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6938 STMF kstat free is using an improper size for kmem_free().
[unleashed.git] / usr / src / uts / common / io / comstar / stmf / stmf.c
bloba209f291e3ddd1256fc88d76ba05691dfa3dc8cf
1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
23 */
24 /*
25 * Copyright 2012, Nexenta Systems, Inc. All rights reserved.
26 * Copyright (c) 2013 by Delphix. All rights reserved.
27 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
28 */
29
30 #include <sys/conf.h>
31 #include <sys/file.h>
32 #include <sys/ddi.h>
33 #include <sys/sunddi.h>
34 #include <sys/modctl.h>
35 #include <sys/scsi/scsi.h>
36 #include <sys/scsi/generic/persist.h>
37 #include <sys/scsi/impl/scsi_reset_notify.h>
38 #include <sys/disp.h>
39 #include <sys/byteorder.h>
40 #include <sys/atomic.h>
41 #include <sys/ethernet.h>
42 #include <sys/sdt.h>
43 #include <sys/nvpair.h>
44 #include <sys/zone.h>
45 #include <sys/id_space.h>
46
47 #include <sys/stmf.h>
48 #include <sys/lpif.h>
49 #include <sys/portif.h>
50 #include <sys/stmf_ioctl.h>
51 #include <sys/pppt_ic_if.h>
52
53 #include "stmf_impl.h"
54 #include "lun_map.h"
55 #include "stmf_state.h"
56 #include "stmf_stats.h"
57
58 /*
59 * Lock order:
60 * stmf_state_lock --> ilport_lock/iss_lockp --> ilu_task_lock
61 */
62
63 static uint64_t stmf_session_counter = 0;
64 static uint16_t stmf_rtpid_counter = 0;
65 /* start messages at 1 */
66 static uint64_t stmf_proxy_msg_id = 1;
67 #define MSG_ID_TM_BIT 0x8000000000000000
68 #define ALIGNED_TO_8BYTE_BOUNDARY(i) (((i) + 7) & ~7)
69
70 /*
71 * When stmf_io_deadman_enabled is set to B_TRUE, we check that finishing up
72 * I/O operations on an offlining LU doesn't take longer than stmf_io_deadman
73 * seconds. If it does, we trigger a panic to inform the user of hung I/O
74 * blocking us for too long.
75 */
76 boolean_t stmf_io_deadman_enabled = B_TRUE;
77 int stmf_io_deadman = 1000; /* seconds */
78
79 struct stmf_svc_clocks;
80
81 static int stmf_attach(dev_info_t *dip, ddi_attach_cmd_t cmd);
82 static int stmf_detach(dev_info_t *dip, ddi_detach_cmd_t cmd);
83 static int stmf_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg,
84 void **result);
85 static int stmf_open(dev_t *devp, int flag, int otype, cred_t *credp);
86 static int stmf_close(dev_t dev, int flag, int otype, cred_t *credp);
87 static int stmf_ioctl(dev_t dev, int cmd, intptr_t data, int mode,
88 cred_t *credp, int *rval);
89 static int stmf_get_stmf_state(stmf_state_desc_t *std);
90 static int stmf_set_stmf_state(stmf_state_desc_t *std);
91 static void stmf_abort_task_offline(scsi_task_t *task, int offline_lu,
92 char *info);
93 static int stmf_set_alua_state(stmf_alua_state_desc_t *alua_state);
94 static void stmf_get_alua_state(stmf_alua_state_desc_t *alua_state);
95
96 static void stmf_task_audit(stmf_i_scsi_task_t *itask,
97 task_audit_event_t te, uint32_t cmd_or_iof, stmf_data_buf_t *dbuf);
98
99 static boolean_t stmf_base16_str_to_binary(char *c, int dplen, uint8_t *dp);
100 static char stmf_ctoi(char c);
101 stmf_xfer_data_t *stmf_prepare_tpgs_data(uint8_t ilu_alua);
102 void stmf_svc_init();
103 stmf_status_t stmf_svc_fini();
104 void stmf_svc(void *arg);
105 static void stmf_wait_ilu_tasks_finish(stmf_i_lu_t *ilu);
106 void stmf_svc_queue(int cmd, void *obj, stmf_state_change_info_t *info);
107 static void stmf_svc_kill_obj_requests(void *obj);
108 static void stmf_svc_timeout(struct stmf_svc_clocks *);
109 void stmf_check_freetask();
110 void stmf_abort_target_reset(scsi_task_t *task);
111 stmf_status_t stmf_lun_reset_poll(stmf_lu_t *lu, struct scsi_task *task,
112 int target_reset);
113 void stmf_target_reset_poll(struct scsi_task *task);
114 void stmf_handle_lun_reset(scsi_task_t *task);
115 void stmf_handle_target_reset(scsi_task_t *task);
116 void stmf_xd_to_dbuf(stmf_data_buf_t *dbuf, int set_rel_off);
117 int stmf_load_ppd_ioctl(stmf_ppioctl_data_t *ppi, uint64_t *ppi_token,
118 uint32_t *err_ret);
119 int stmf_delete_ppd_ioctl(stmf_ppioctl_data_t *ppi);
120 int stmf_get_ppd_ioctl(stmf_ppioctl_data_t *ppi, stmf_ppioctl_data_t *ppi_out,
121 uint32_t *err_ret);
122 void stmf_delete_ppd(stmf_pp_data_t *ppd);
123 void stmf_delete_all_ppds();
124 void stmf_trace_clear();
125 void stmf_worker_init();
126 stmf_status_t stmf_worker_fini();
127 void stmf_worker_mgmt();
128 void stmf_worker_task(void *arg);
129 static void stmf_task_lu_free(scsi_task_t *task, stmf_i_scsi_session_t *iss);
130 static stmf_status_t stmf_ic_lu_reg(stmf_ic_reg_dereg_lun_msg_t *msg,
131 uint32_t type);
132 static stmf_status_t stmf_ic_lu_dereg(stmf_ic_reg_dereg_lun_msg_t *msg);
133 static stmf_status_t stmf_ic_rx_scsi_status(stmf_ic_scsi_status_msg_t *msg);
134 static stmf_status_t stmf_ic_rx_status(stmf_ic_status_msg_t *msg);
135 static stmf_status_t stmf_ic_rx_scsi_data(stmf_ic_scsi_data_msg_t *msg);
136 void stmf_task_lu_killall(stmf_lu_t *lu, scsi_task_t *tm_task, stmf_status_t s);
137
138 /* pppt modhandle */
139 ddi_modhandle_t pppt_mod;
140
141 /* pppt modload imported functions */
142 stmf_ic_reg_port_msg_alloc_func_t ic_reg_port_msg_alloc;
143 stmf_ic_dereg_port_msg_alloc_func_t ic_dereg_port_msg_alloc;
144 stmf_ic_reg_lun_msg_alloc_func_t ic_reg_lun_msg_alloc;
145 stmf_ic_dereg_lun_msg_alloc_func_t ic_dereg_lun_msg_alloc;
146 stmf_ic_lun_active_msg_alloc_func_t ic_lun_active_msg_alloc;
147 stmf_ic_scsi_cmd_msg_alloc_func_t ic_scsi_cmd_msg_alloc;
148 stmf_ic_scsi_data_xfer_done_msg_alloc_func_t ic_scsi_data_xfer_done_msg_alloc;
149 stmf_ic_session_create_msg_alloc_func_t ic_session_reg_msg_alloc;
150 stmf_ic_session_destroy_msg_alloc_func_t ic_session_dereg_msg_alloc;
151 stmf_ic_tx_msg_func_t ic_tx_msg;
152 stmf_ic_msg_free_func_t ic_msg_free;
153
154 static void stmf_itl_task_start(stmf_i_scsi_task_t *itask);
155 static void stmf_itl_lu_new_task(stmf_i_scsi_task_t *itask);
156 static void stmf_itl_task_done(stmf_i_scsi_task_t *itask);
157
158 static void stmf_lport_xfer_start(stmf_i_scsi_task_t *itask,
159 stmf_data_buf_t *dbuf);
160 static void stmf_lport_xfer_done(stmf_i_scsi_task_t *itask,
161 stmf_data_buf_t *dbuf);
162
163 static void stmf_update_kstat_lu_q(scsi_task_t *, void());
164 static void stmf_update_kstat_lport_q(scsi_task_t *, void());
165 static void stmf_update_kstat_lu_io(scsi_task_t *, stmf_data_buf_t *);
166 static void stmf_update_kstat_lport_io(scsi_task_t *, stmf_data_buf_t *);
167
168 static int stmf_irport_compare(const void *void_irport1,
169 const void *void_irport2);
170 static stmf_i_remote_port_t *stmf_irport_create(scsi_devid_desc_t *rport_devid);
171 static void stmf_irport_destroy(stmf_i_remote_port_t *irport);
172 static stmf_i_remote_port_t *stmf_irport_register(
173 scsi_devid_desc_t *rport_devid);
174 static stmf_i_remote_port_t *stmf_irport_lookup_locked(
175 scsi_devid_desc_t *rport_devid);
176 static void stmf_irport_deregister(stmf_i_remote_port_t *irport);
177
178 extern struct mod_ops mod_driverops;
179
180 /* =====[ Tunables ]===== */
181 /* Internal tracing */
182 volatile int stmf_trace_on = 1;
183 volatile int stmf_trace_buf_size = (1 * 1024 * 1024);
184 /*
185 * The reason default task timeout is 75 is because we want the
186 * host to timeout 1st and mostly host timeout is 60 seconds.
187 */
188 volatile int stmf_default_task_timeout = 75;
189 /*
190 * Setting this to one means, you are responsible for config load and keeping
191 * things in sync with persistent database.
192 */
193 volatile int stmf_allow_modunload = 0;
194
195 volatile int stmf_max_nworkers = 256;
196 volatile int stmf_min_nworkers = 4;
197 volatile int stmf_worker_scale_down_delay = 20;
198
199 /* === [ Debugging and fault injection ] === */
200 #ifdef DEBUG
201 volatile uint32_t stmf_drop_task_counter = 0;
202 volatile uint32_t stmf_drop_buf_counter = 0;
203
204 #endif
205
206 stmf_state_t stmf_state;
207 static stmf_lu_t *dlun0;
208
209 static uint8_t stmf_first_zero[] =
210 { 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 0xff };
211 static uint8_t stmf_first_one[] =
212 { 0xff, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0 };
213
214 static kmutex_t trace_buf_lock;
215 static int trace_buf_size;
216 static int trace_buf_curndx;
217 caddr_t stmf_trace_buf;
218
219 static enum {
220 STMF_WORKERS_DISABLED = 0,
221 STMF_WORKERS_ENABLING,
222 STMF_WORKERS_ENABLED
223 } stmf_workers_state = STMF_WORKERS_DISABLED;
224 static int stmf_i_max_nworkers;
225 static int stmf_i_min_nworkers;
226 static int stmf_nworkers_cur; /* # of workers currently running */
227 static int stmf_nworkers_needed; /* # of workers need to be running */
228 static int stmf_worker_sel_counter = 0;
229 static uint32_t stmf_cur_ntasks = 0;
230 static clock_t stmf_wm_last = 0;
231 /*
232 * This is equal to stmf_nworkers_cur while we are increasing # workers and
233 * stmf_nworkers_needed while we are decreasing the worker count.
234 */
235 static int stmf_nworkers_accepting_cmds;
236 static stmf_worker_t *stmf_workers = NULL;
237 static clock_t stmf_worker_mgmt_delay = 2;
238 static clock_t stmf_worker_scale_down_timer = 0;
239 static int stmf_worker_scale_down_qd = 0;
240
241 static struct cb_ops stmf_cb_ops = {
242 stmf_open, /* open */
243 stmf_close, /* close */
244 nodev, /* strategy */
245 nodev, /* print */
246 nodev, /* dump */
247 nodev, /* read */
248 nodev, /* write */
249 stmf_ioctl, /* ioctl */
250 nodev, /* devmap */
251 nodev, /* mmap */
252 nodev, /* segmap */
253 nochpoll, /* chpoll */
254 ddi_prop_op, /* cb_prop_op */
255 0, /* streamtab */
256 D_NEW | D_MP, /* cb_flag */
257 CB_REV, /* rev */
258 nodev, /* aread */
259 nodev /* awrite */
260 };
261
262 static struct dev_ops stmf_ops = {
263 DEVO_REV,
264 0,
265 stmf_getinfo,
266 nulldev, /* identify */
267 nulldev, /* probe */
268 stmf_attach,
269 stmf_detach,
270 nodev, /* reset */
271 &stmf_cb_ops,
272 NULL, /* bus_ops */
273 NULL /* power */
274 };
275
276 #define STMF_NAME "COMSTAR STMF"
277 #define STMF_MODULE_NAME "stmf"
278
279 static struct modldrv modldrv = {
280 &mod_driverops,
281 STMF_NAME,
282 &stmf_ops
283 };
284
285 static struct modlinkage modlinkage = {
286 MODREV_1,
287 &modldrv,
288 NULL
289 };
290
291 int
292 _init(void)
293 {
294 int ret;
295
296 ret = mod_install(&modlinkage);
297 if (ret)
298 return (ret);
299 stmf_trace_buf = kmem_zalloc(stmf_trace_buf_size, KM_SLEEP);
300 trace_buf_size = stmf_trace_buf_size;
301 trace_buf_curndx = 0;
302 mutex_init(&trace_buf_lock, NULL, MUTEX_DRIVER, 0);
303 bzero(&stmf_state, sizeof (stmf_state_t));
304 /* STMF service is off by default */
305 stmf_state.stmf_service_running = 0;
306 /* default lu/lport states are online */
307 stmf_state.stmf_default_lu_state = STMF_STATE_ONLINE;
308 stmf_state.stmf_default_lport_state = STMF_STATE_ONLINE;
309 mutex_init(&stmf_state.stmf_lock, NULL, MUTEX_DRIVER, NULL);
310 cv_init(&stmf_state.stmf_cv, NULL, CV_DRIVER, NULL);
311 stmf_session_counter = (uint64_t)ddi_get_lbolt();
312 avl_create(&stmf_state.stmf_irportlist,
313 stmf_irport_compare, sizeof (stmf_i_remote_port_t),
314 offsetof(stmf_i_remote_port_t, irport_ln));
315 stmf_state.stmf_ilport_inst_space =
316 id_space_create("lport-instances", 0, MAX_ILPORT);
317 stmf_state.stmf_irport_inst_space =
318 id_space_create("rport-instances", 0, MAX_IRPORT);
319 stmf_view_init();
320 stmf_svc_init();
321 stmf_dlun_init();
322 return (ret);
323 }
324
325 int
326 _fini(void)
327 {
328 int ret;
329 stmf_i_remote_port_t *irport;
330 void *avl_dest_cookie = NULL;
331
332 if (stmf_state.stmf_service_running)
333 return (EBUSY);
334 if ((!stmf_allow_modunload) &&
335 (stmf_state.stmf_config_state != STMF_CONFIG_NONE)) {
336 return (EBUSY);
337 }
338 if (stmf_state.stmf_nlps || stmf_state.stmf_npps) {
339 return (EBUSY);
340 }
341 if (stmf_dlun_fini() != STMF_SUCCESS)
342 return (EBUSY);
343 if (stmf_worker_fini() != STMF_SUCCESS) {
344 stmf_dlun_init();
345 return (EBUSY);
346 }
347 if (stmf_svc_fini() != STMF_SUCCESS) {
348 stmf_dlun_init();
349 stmf_worker_init();
350 return (EBUSY);
351 }
352
353 ret = mod_remove(&modlinkage);
354 if (ret) {
355 stmf_svc_init();
356 stmf_dlun_init();
357 stmf_worker_init();
358 return (ret);
359 }
360
361 stmf_view_clear_config();
362
363 while ((irport = avl_destroy_nodes(&stmf_state.stmf_irportlist,
364 &avl_dest_cookie)) != NULL)
365 stmf_irport_destroy(irport);
366 avl_destroy(&stmf_state.stmf_irportlist);
367 id_space_destroy(stmf_state.stmf_ilport_inst_space);
368 id_space_destroy(stmf_state.stmf_irport_inst_space);
369
370 kmem_free(stmf_trace_buf, stmf_trace_buf_size);
371 mutex_destroy(&trace_buf_lock);
372 mutex_destroy(&stmf_state.stmf_lock);
373 cv_destroy(&stmf_state.stmf_cv);
374 return (ret);
375 }
376
377 int
378 _info(struct modinfo *modinfop)
379 {
380 return (mod_info(&modlinkage, modinfop));
381 }
382
383 /* ARGSUSED */
384 static int
385 stmf_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, void **result)
386 {
387 switch (cmd) {
388 case DDI_INFO_DEVT2DEVINFO:
389 *result = stmf_state.stmf_dip;
390 break;
391 case DDI_INFO_DEVT2INSTANCE:
392 *result =
393 (void *)(uintptr_t)ddi_get_instance(stmf_state.stmf_dip);
394 break;
395 default:
396 return (DDI_FAILURE);
397 }
398
399 return (DDI_SUCCESS);
400 }
401
402 static int
403 stmf_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
404 {
405 switch (cmd) {
406 case DDI_ATTACH:
407 stmf_state.stmf_dip = dip;
408
409 if (ddi_create_minor_node(dip, "admin", S_IFCHR, 0,
410 DDI_NT_STMF, 0) != DDI_SUCCESS) {
411 break;
412 }
413 ddi_report_dev(dip);
414 return (DDI_SUCCESS);
415 }
416
417 return (DDI_FAILURE);
418 }
419
420 static int
421 stmf_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
422 {
423 switch (cmd) {
424 case DDI_DETACH:
425 ddi_remove_minor_node(dip, 0);
426 return (DDI_SUCCESS);
427 }
428
429 return (DDI_FAILURE);
430 }
431
432 /* ARGSUSED */
433 static int
434 stmf_open(dev_t *devp, int flag, int otype, cred_t *credp)
435 {
436 mutex_enter(&stmf_state.stmf_lock);
437 if (stmf_state.stmf_exclusive_open) {
438 mutex_exit(&stmf_state.stmf_lock);
439 return (EBUSY);
440 }
441 if (flag & FEXCL) {
442 if (stmf_state.stmf_opened) {
443 mutex_exit(&stmf_state.stmf_lock);
444 return (EBUSY);
445 }
446 stmf_state.stmf_exclusive_open = 1;
447 }
448 stmf_state.stmf_opened = 1;
449 mutex_exit(&stmf_state.stmf_lock);
450 return (0);
451 }
452
453 /* ARGSUSED */
454 static int
455 stmf_close(dev_t dev, int flag, int otype, cred_t *credp)
456 {
457 mutex_enter(&stmf_state.stmf_lock);
458 stmf_state.stmf_opened = 0;
459 if (stmf_state.stmf_exclusive_open &&
460 (stmf_state.stmf_config_state != STMF_CONFIG_INIT_DONE)) {
461 stmf_state.stmf_config_state = STMF_CONFIG_NONE;
462 stmf_delete_all_ppds();
463 stmf_view_clear_config();
464 stmf_view_init();
465 }
466 stmf_state.stmf_exclusive_open = 0;
467 mutex_exit(&stmf_state.stmf_lock);
468 return (0);
469 }
470
471 int
472 stmf_copyin_iocdata(intptr_t data, int mode, stmf_iocdata_t **iocd,
473 void **ibuf, void **obuf)
474 {
475 int ret;
476
477 *ibuf = NULL;
478 *obuf = NULL;
479 *iocd = kmem_zalloc(sizeof (stmf_iocdata_t), KM_SLEEP);
480
481 ret = ddi_copyin((void *)data, *iocd, sizeof (stmf_iocdata_t), mode);
482 if (ret)
483 return (EFAULT);
484 if ((*iocd)->stmf_version != STMF_VERSION_1) {
485 ret = EINVAL;
486 goto copyin_iocdata_done;
487 }
488 if ((*iocd)->stmf_ibuf_size) {
489 *ibuf = kmem_zalloc((*iocd)->stmf_ibuf_size, KM_SLEEP);
490 ret = ddi_copyin((void *)((unsigned long)(*iocd)->stmf_ibuf),
491 *ibuf, (*iocd)->stmf_ibuf_size, mode);
492 }
493 if ((*iocd)->stmf_obuf_size)
494 *obuf = kmem_zalloc((*iocd)->stmf_obuf_size, KM_SLEEP);
495
496 if (ret == 0)
497 return (0);
498 ret = EFAULT;
499 copyin_iocdata_done:;
500 if (*obuf) {
501 kmem_free(*obuf, (*iocd)->stmf_obuf_size);
502 *obuf = NULL;
503 }
504 if (*ibuf) {
505 kmem_free(*ibuf, (*iocd)->stmf_ibuf_size);
506 *ibuf = NULL;
507 }
508 kmem_free(*iocd, sizeof (stmf_iocdata_t));
509 return (ret);
510 }
511
512 int
513 stmf_copyout_iocdata(intptr_t data, int mode, stmf_iocdata_t *iocd, void *obuf)
514 {
515 int ret;
516
517 if (iocd->stmf_obuf_size) {
518 ret = ddi_copyout(obuf, (void *)(unsigned long)iocd->stmf_obuf,
519 iocd->stmf_obuf_size, mode);
520 if (ret)
521 return (EFAULT);
522 }
523 ret = ddi_copyout(iocd, (void *)data, sizeof (stmf_iocdata_t), mode);
524 if (ret)
525 return (EFAULT);
526 return (0);
527 }
528
529 /* ARGSUSED */
530 static int
531 stmf_ioctl(dev_t dev, int cmd, intptr_t data, int mode,
532 cred_t *credp, int *rval)
533 {
534 stmf_iocdata_t *iocd;
535 void *ibuf = NULL, *obuf = NULL;
536 slist_lu_t *luid_list;
537 slist_target_port_t *lportid_list;
538 stmf_i_lu_t *ilu;
539 stmf_i_local_port_t *ilport;
540 stmf_i_scsi_session_t *iss;
541 slist_scsi_session_t *iss_list;
542 sioc_lu_props_t *lup;
543 sioc_target_port_props_t *lportp;
544 stmf_ppioctl_data_t *ppi, *ppi_out = NULL;
545 uint64_t *ppi_token = NULL;
546 uint8_t *p_id, *id;
547 stmf_state_desc_t *std;
548 stmf_status_t ctl_ret;
549 stmf_state_change_info_t ssi;
550 int ret = 0;
551 uint32_t n;
552 int i;
553 stmf_group_op_data_t *grp_entry;
554 stmf_group_name_t *grpname;
555 stmf_view_op_entry_t *ve;
556 stmf_id_type_t idtype;
557 stmf_id_data_t *id_entry;
558 stmf_id_list_t *id_list;
559 stmf_view_entry_t *view_entry;
560 stmf_set_props_t *stmf_set_props;
561 uint32_t veid;
562 if ((cmd & 0xff000000) != STMF_IOCTL) {
563 return (ENOTTY);
564 }
565
566 if (drv_priv(credp) != 0) {
567 return (EPERM);
568 }
569
570 ret = stmf_copyin_iocdata(data, mode, &iocd, &ibuf, &obuf);
571 if (ret)
572 return (ret);
573 iocd->stmf_error = 0;
574
575 switch (cmd) {
576 case STMF_IOCTL_LU_LIST:
577 /* retrieves both registered/unregistered */
578 mutex_enter(&stmf_state.stmf_lock);
579 id_list = &stmf_state.stmf_luid_list;
580 n = min(id_list->id_count,
581 (iocd->stmf_obuf_size)/sizeof (slist_lu_t));
582 iocd->stmf_obuf_max_nentries = id_list->id_count;
583 luid_list = (slist_lu_t *)obuf;
584 id_entry = id_list->idl_head;
585 for (i = 0; i < n; i++) {
586 bcopy(id_entry->id_data, luid_list[i].lu_guid, 16);
587 id_entry = id_entry->id_next;
588 }
589
590 n = iocd->stmf_obuf_size/sizeof (slist_lu_t);
591 for (ilu = stmf_state.stmf_ilulist; ilu; ilu = ilu->ilu_next) {
592 id = (uint8_t *)ilu->ilu_lu->lu_id;
593 if (stmf_lookup_id(id_list, 16, id + 4) == NULL) {
594 iocd->stmf_obuf_max_nentries++;
595 if (i < n) {
596 bcopy(id + 4, luid_list[i].lu_guid,
597 sizeof (slist_lu_t));
598 i++;
599 }
600 }
601 }
602 iocd->stmf_obuf_nentries = i;
603 mutex_exit(&stmf_state.stmf_lock);
604 break;
605
606 case STMF_IOCTL_REG_LU_LIST:
607 mutex_enter(&stmf_state.stmf_lock);
608 iocd->stmf_obuf_max_nentries = stmf_state.stmf_nlus;
609 n = min(stmf_state.stmf_nlus,
610 (iocd->stmf_obuf_size)/sizeof (slist_lu_t));
611 iocd->stmf_obuf_nentries = n;
612 ilu = stmf_state.stmf_ilulist;
613 luid_list = (slist_lu_t *)obuf;
614 for (i = 0; i < n; i++) {
615 uint8_t *id;
616 id = (uint8_t *)ilu->ilu_lu->lu_id;
617 bcopy(id + 4, luid_list[i].lu_guid, 16);
618 ilu = ilu->ilu_next;
619 }
620 mutex_exit(&stmf_state.stmf_lock);
621 break;
622
623 case STMF_IOCTL_VE_LU_LIST:
624 mutex_enter(&stmf_state.stmf_lock);
625 id_list = &stmf_state.stmf_luid_list;
626 n = min(id_list->id_count,
627 (iocd->stmf_obuf_size)/sizeof (slist_lu_t));
628 iocd->stmf_obuf_max_nentries = id_list->id_count;
629 iocd->stmf_obuf_nentries = n;
630 luid_list = (slist_lu_t *)obuf;
631 id_entry = id_list->idl_head;
632 for (i = 0; i < n; i++) {
633 bcopy(id_entry->id_data, luid_list[i].lu_guid, 16);
634 id_entry = id_entry->id_next;
635 }
636 mutex_exit(&stmf_state.stmf_lock);
637 break;
638
639 case STMF_IOCTL_TARGET_PORT_LIST:
640 mutex_enter(&stmf_state.stmf_lock);
641 iocd->stmf_obuf_max_nentries = stmf_state.stmf_nlports;
642 n = min(stmf_state.stmf_nlports,
643 (iocd->stmf_obuf_size)/sizeof (slist_target_port_t));
644 iocd->stmf_obuf_nentries = n;
645 ilport = stmf_state.stmf_ilportlist;
646 lportid_list = (slist_target_port_t *)obuf;
647 for (i = 0; i < n; i++) {
648 uint8_t *id;
649 id = (uint8_t *)ilport->ilport_lport->lport_id;
650 bcopy(id, lportid_list[i].target, id[3] + 4);
651 ilport = ilport->ilport_next;
652 }
653 mutex_exit(&stmf_state.stmf_lock);
654 break;
655
656 case STMF_IOCTL_SESSION_LIST:
657 p_id = (uint8_t *)ibuf;
658 if ((p_id == NULL) || (iocd->stmf_ibuf_size < 4) ||
659 (iocd->stmf_ibuf_size < (p_id[3] + 4))) {
660 ret = EINVAL;
661 break;
662 }
663 mutex_enter(&stmf_state.stmf_lock);
664 for (ilport = stmf_state.stmf_ilportlist; ilport; ilport =
665 ilport->ilport_next) {
666 uint8_t *id;
667 id = (uint8_t *)ilport->ilport_lport->lport_id;
668 if ((p_id[3] == id[3]) &&
669 (bcmp(p_id + 4, id + 4, id[3]) == 0)) {
670 break;
671 }
672 }
673 if (ilport == NULL) {
674 mutex_exit(&stmf_state.stmf_lock);
675 ret = ENOENT;
676 break;
677 }
678 iocd->stmf_obuf_max_nentries = ilport->ilport_nsessions;
679 n = min(ilport->ilport_nsessions,
680 (iocd->stmf_obuf_size)/sizeof (slist_scsi_session_t));
681 iocd->stmf_obuf_nentries = n;
682 iss = ilport->ilport_ss_list;
683 iss_list = (slist_scsi_session_t *)obuf;
684 for (i = 0; i < n; i++) {
685 uint8_t *id;
686 id = (uint8_t *)iss->iss_ss->ss_rport_id;
687 bcopy(id, iss_list[i].initiator, id[3] + 4);
688 iss_list[i].creation_time = (uint32_t)
689 iss->iss_creation_time;
690 if (iss->iss_ss->ss_rport_alias) {
691 (void) strncpy(iss_list[i].alias,
692 iss->iss_ss->ss_rport_alias, 255);
693 iss_list[i].alias[255] = 0;
694 } else {
695 iss_list[i].alias[0] = 0;
696 }
697 iss = iss->iss_next;
698 }
699 mutex_exit(&stmf_state.stmf_lock);
700 break;
701
702 case STMF_IOCTL_GET_LU_PROPERTIES:
703 p_id = (uint8_t *)ibuf;
704 if ((iocd->stmf_ibuf_size < 16) ||
705 (iocd->stmf_obuf_size < sizeof (sioc_lu_props_t)) ||
706 (p_id[0] == 0)) {
707 ret = EINVAL;
708 break;
709 }
710 mutex_enter(&stmf_state.stmf_lock);
711 for (ilu = stmf_state.stmf_ilulist; ilu; ilu = ilu->ilu_next) {
712 if (bcmp(p_id, ilu->ilu_lu->lu_id->ident, 16) == 0)
713 break;
714 }
715 if (ilu == NULL) {
716 mutex_exit(&stmf_state.stmf_lock);
717 ret = ENOENT;
718 break;
719 }
720 lup = (sioc_lu_props_t *)obuf;
721 bcopy(ilu->ilu_lu->lu_id->ident, lup->lu_guid, 16);
722 lup->lu_state = ilu->ilu_state & 0x0f;
723 lup->lu_present = 1; /* XXX */
724 (void) strncpy(lup->lu_provider_name,
725 ilu->ilu_lu->lu_lp->lp_name, 255);
726 lup->lu_provider_name[254] = 0;
727 if (ilu->ilu_lu->lu_alias) {
728 (void) strncpy(lup->lu_alias,
729 ilu->ilu_lu->lu_alias, 255);
730 lup->lu_alias[255] = 0;
731 } else {
732 lup->lu_alias[0] = 0;
733 }
734 mutex_exit(&stmf_state.stmf_lock);
735 break;
736
737 case STMF_IOCTL_GET_TARGET_PORT_PROPERTIES:
738 p_id = (uint8_t *)ibuf;
739 if ((p_id == NULL) ||
740 (iocd->stmf_ibuf_size < (p_id[3] + 4)) ||
741 (iocd->stmf_obuf_size <
742 sizeof (sioc_target_port_props_t))) {
743 ret = EINVAL;
744 break;
745 }
746 mutex_enter(&stmf_state.stmf_lock);
747 for (ilport = stmf_state.stmf_ilportlist; ilport;
748 ilport = ilport->ilport_next) {
749 uint8_t *id;
750 id = (uint8_t *)ilport->ilport_lport->lport_id;
751 if ((p_id[3] == id[3]) &&
752 (bcmp(p_id+4, id+4, id[3]) == 0))
753 break;
754 }
755 if (ilport == NULL) {
756 mutex_exit(&stmf_state.stmf_lock);
757 ret = ENOENT;
758 break;
759 }
760 lportp = (sioc_target_port_props_t *)obuf;
761 bcopy(ilport->ilport_lport->lport_id, lportp->tgt_id,
762 ilport->ilport_lport->lport_id->ident_length + 4);
763 lportp->tgt_state = ilport->ilport_state & 0x0f;
764 lportp->tgt_present = 1; /* XXX */
765 (void) strncpy(lportp->tgt_provider_name,
766 ilport->ilport_lport->lport_pp->pp_name, 255);
767 lportp->tgt_provider_name[254] = 0;
768 if (ilport->ilport_lport->lport_alias) {
769 (void) strncpy(lportp->tgt_alias,
770 ilport->ilport_lport->lport_alias, 255);
771 lportp->tgt_alias[255] = 0;
772 } else {
773 lportp->tgt_alias[0] = 0;
774 }
775 mutex_exit(&stmf_state.stmf_lock);
776 break;
777
778 case STMF_IOCTL_SET_STMF_STATE:
779 if ((ibuf == NULL) ||
780 (iocd->stmf_ibuf_size < sizeof (stmf_state_desc_t))) {
781 ret = EINVAL;
782 break;
783 }
784 ret = stmf_set_stmf_state((stmf_state_desc_t *)ibuf);
785 break;
786
787 case STMF_IOCTL_GET_STMF_STATE:
788 if ((obuf == NULL) ||
789 (iocd->stmf_obuf_size < sizeof (stmf_state_desc_t))) {
790 ret = EINVAL;
791 break;
792 }
793 ret = stmf_get_stmf_state((stmf_state_desc_t *)obuf);
794 break;
795
796 case STMF_IOCTL_SET_ALUA_STATE:
797 if ((ibuf == NULL) ||
798 (iocd->stmf_ibuf_size < sizeof (stmf_alua_state_desc_t))) {
799 ret = EINVAL;
800 break;
801 }
802 ret = stmf_set_alua_state((stmf_alua_state_desc_t *)ibuf);
803 break;
804
805 case STMF_IOCTL_GET_ALUA_STATE:
806 if ((obuf == NULL) ||
807 (iocd->stmf_obuf_size < sizeof (stmf_alua_state_desc_t))) {
808 ret = EINVAL;
809 break;
810 }
811 stmf_get_alua_state((stmf_alua_state_desc_t *)obuf);
812 break;
813
814 case STMF_IOCTL_SET_LU_STATE:
815 ssi.st_rflags = STMF_RFLAG_USER_REQUEST;
816 ssi.st_additional_info = NULL;
817 std = (stmf_state_desc_t *)ibuf;
818 if ((ibuf == NULL) ||
819 (iocd->stmf_ibuf_size < sizeof (stmf_state_desc_t))) {
820 ret = EINVAL;
821 break;
822 }
823 p_id = std->ident;
824 mutex_enter(&stmf_state.stmf_lock);
825 if (stmf_state.stmf_inventory_locked) {
826 mutex_exit(&stmf_state.stmf_lock);
827 ret = EBUSY;
828 break;
829 }
830 for (ilu = stmf_state.stmf_ilulist; ilu; ilu = ilu->ilu_next) {
831 if (bcmp(p_id, ilu->ilu_lu->lu_id->ident, 16) == 0)
832 break;
833 }
834 if (ilu == NULL) {
835 mutex_exit(&stmf_state.stmf_lock);
836 ret = ENOENT;
837 break;
838 }
839 stmf_state.stmf_inventory_locked = 1;
840 mutex_exit(&stmf_state.stmf_lock);
841 cmd = (std->state == STMF_STATE_ONLINE) ? STMF_CMD_LU_ONLINE :
842 STMF_CMD_LU_OFFLINE;
843 ctl_ret = stmf_ctl(cmd, (void *)ilu->ilu_lu, &ssi);
844 if (ctl_ret == STMF_ALREADY)
845 ret = 0;
846 else if (ctl_ret == STMF_BUSY)
847 ret = EBUSY;
848 else if (ctl_ret != STMF_SUCCESS)
849 ret = EIO;
850 mutex_enter(&stmf_state.stmf_lock);
851 stmf_state.stmf_inventory_locked = 0;
852 mutex_exit(&stmf_state.stmf_lock);
853 break;
854
855 case STMF_IOCTL_SET_STMF_PROPS:
856 if ((ibuf == NULL) ||
857 (iocd->stmf_ibuf_size < sizeof (stmf_set_props_t))) {
858 ret = EINVAL;
859 break;
860 }
861 stmf_set_props = (stmf_set_props_t *)ibuf;
862 mutex_enter(&stmf_state.stmf_lock);
863 if ((stmf_set_props->default_lu_state_value ==
864 STMF_STATE_OFFLINE) ||
865 (stmf_set_props->default_lu_state_value ==
866 STMF_STATE_ONLINE)) {
867 stmf_state.stmf_default_lu_state =
868 stmf_set_props->default_lu_state_value;
869 }
870 if ((stmf_set_props->default_target_state_value ==
871 STMF_STATE_OFFLINE) ||
872 (stmf_set_props->default_target_state_value ==
873 STMF_STATE_ONLINE)) {
874 stmf_state.stmf_default_lport_state =
875 stmf_set_props->default_target_state_value;
876 }
877
878 mutex_exit(&stmf_state.stmf_lock);
879 break;
880
881 case STMF_IOCTL_SET_TARGET_PORT_STATE:
882 ssi.st_rflags = STMF_RFLAG_USER_REQUEST;
883 ssi.st_additional_info = NULL;
884 std = (stmf_state_desc_t *)ibuf;
885 if ((ibuf == NULL) ||
886 (iocd->stmf_ibuf_size < sizeof (stmf_state_desc_t))) {
887 ret = EINVAL;
888 break;
889 }
890 p_id = std->ident;
891 mutex_enter(&stmf_state.stmf_lock);
892 if (stmf_state.stmf_inventory_locked) {
893 mutex_exit(&stmf_state.stmf_lock);
894 ret = EBUSY;
895 break;
896 }
897 for (ilport = stmf_state.stmf_ilportlist; ilport;
898 ilport = ilport->ilport_next) {
899 uint8_t *id;
900 id = (uint8_t *)ilport->ilport_lport->lport_id;
901 if ((id[3] == p_id[3]) &&
902 (bcmp(id+4, p_id+4, id[3]) == 0)) {
903 break;
904 }
905 }
906 if (ilport == NULL) {
907 mutex_exit(&stmf_state.stmf_lock);
908 ret = ENOENT;
909 break;
910 }
911 stmf_state.stmf_inventory_locked = 1;
912 mutex_exit(&stmf_state.stmf_lock);
913 cmd = (std->state == STMF_STATE_ONLINE) ?
914 STMF_CMD_LPORT_ONLINE : STMF_CMD_LPORT_OFFLINE;
915 ctl_ret = stmf_ctl(cmd, (void *)ilport->ilport_lport, &ssi);
916 if (ctl_ret == STMF_ALREADY)
917 ret = 0;
918 else if (ctl_ret == STMF_BUSY)
919 ret = EBUSY;
920 else if (ctl_ret != STMF_SUCCESS)
921 ret = EIO;
922 mutex_enter(&stmf_state.stmf_lock);
923 stmf_state.stmf_inventory_locked = 0;
924 mutex_exit(&stmf_state.stmf_lock);
925 break;
926
927 case STMF_IOCTL_ADD_HG_ENTRY:
928 idtype = STMF_ID_TYPE_HOST;
929 /* FALLTHROUGH */
930 case STMF_IOCTL_ADD_TG_ENTRY:
931 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
932 ret = EACCES;
933 iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
934 break;
935 }
936 if (cmd == STMF_IOCTL_ADD_TG_ENTRY) {
937 idtype = STMF_ID_TYPE_TARGET;
938 }
939 grp_entry = (stmf_group_op_data_t *)ibuf;
940 if ((ibuf == NULL) ||
941 (iocd->stmf_ibuf_size < sizeof (stmf_group_op_data_t))) {
942 ret = EINVAL;
943 break;
944 }
945 if (grp_entry->group.name[0] == '*') {
946 ret = EINVAL;
947 break; /* not allowed */
948 }
949 mutex_enter(&stmf_state.stmf_lock);
950 ret = stmf_add_group_member(grp_entry->group.name,
951 grp_entry->group.name_size,
952 grp_entry->ident + 4,
953 grp_entry->ident[3],
954 idtype,
955 &iocd->stmf_error);
956 mutex_exit(&stmf_state.stmf_lock);
957 break;
958 case STMF_IOCTL_REMOVE_HG_ENTRY:
959 idtype = STMF_ID_TYPE_HOST;
960 /* FALLTHROUGH */
961 case STMF_IOCTL_REMOVE_TG_ENTRY:
962 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
963 ret = EACCES;
964 iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
965 break;
966 }
967 if (cmd == STMF_IOCTL_REMOVE_TG_ENTRY) {
968 idtype = STMF_ID_TYPE_TARGET;
969 }
970 grp_entry = (stmf_group_op_data_t *)ibuf;
971 if ((ibuf == NULL) ||
972 (iocd->stmf_ibuf_size < sizeof (stmf_group_op_data_t))) {
973 ret = EINVAL;
974 break;
975 }
976 if (grp_entry->group.name[0] == '*') {
977 ret = EINVAL;
978 break; /* not allowed */
979 }
980 mutex_enter(&stmf_state.stmf_lock);
981 ret = stmf_remove_group_member(grp_entry->group.name,
982 grp_entry->group.name_size,
983 grp_entry->ident + 4,
984 grp_entry->ident[3],
985 idtype,
986 &iocd->stmf_error);
987 mutex_exit(&stmf_state.stmf_lock);
988 break;
989 case STMF_IOCTL_CREATE_HOST_GROUP:
990 idtype = STMF_ID_TYPE_HOST_GROUP;
991 /* FALLTHROUGH */
992 case STMF_IOCTL_CREATE_TARGET_GROUP:
993 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
994 ret = EACCES;
995 iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
996 break;
997 }
998 grpname = (stmf_group_name_t *)ibuf;
999
1000 if (cmd == STMF_IOCTL_CREATE_TARGET_GROUP)
1001 idtype = STMF_ID_TYPE_TARGET_GROUP;
1002 if ((ibuf == NULL) ||
1003 (iocd->stmf_ibuf_size < sizeof (stmf_group_name_t))) {
1004 ret = EINVAL;
1005 break;
1006 }
1007 if (grpname->name[0] == '*') {
1008 ret = EINVAL;
1009 break; /* not allowed */
1010 }
1011 mutex_enter(&stmf_state.stmf_lock);
1012 ret = stmf_add_group(grpname->name,
1013 grpname->name_size, idtype, &iocd->stmf_error);
1014 mutex_exit(&stmf_state.stmf_lock);
1015 break;
1016 case STMF_IOCTL_REMOVE_HOST_GROUP:
1017 idtype = STMF_ID_TYPE_HOST_GROUP;
1018 /* FALLTHROUGH */
1019 case STMF_IOCTL_REMOVE_TARGET_GROUP:
1020 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
1021 ret = EACCES;
1022 iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
1023 break;
1024 }
1025 grpname = (stmf_group_name_t *)ibuf;
1026 if (cmd == STMF_IOCTL_REMOVE_TARGET_GROUP)
1027 idtype = STMF_ID_TYPE_TARGET_GROUP;
1028 if ((ibuf == NULL) ||
1029 (iocd->stmf_ibuf_size < sizeof (stmf_group_name_t))) {
1030 ret = EINVAL;
1031 break;
1032 }
1033 if (grpname->name[0] == '*') {
1034 ret = EINVAL;
1035 break; /* not allowed */
1036 }
1037 mutex_enter(&stmf_state.stmf_lock);
1038 ret = stmf_remove_group(grpname->name,
1039 grpname->name_size, idtype, &iocd->stmf_error);
1040 mutex_exit(&stmf_state.stmf_lock);
1041 break;
1042 case STMF_IOCTL_VALIDATE_VIEW:
1043 case STMF_IOCTL_ADD_VIEW_ENTRY:
1044 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
1045 ret = EACCES;
1046 iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
1047 break;
1048 }
1049 ve = (stmf_view_op_entry_t *)ibuf;
1050 if ((ibuf == NULL) ||
1051 (iocd->stmf_ibuf_size < sizeof (stmf_view_op_entry_t))) {
1052 ret = EINVAL;
1053 break;
1054 }
1055 if (!ve->ve_lu_number_valid)
1056 ve->ve_lu_nbr[2] = 0xFF;
1057 if (ve->ve_all_hosts) {
1058 ve->ve_host_group.name[0] = '*';
1059 ve->ve_host_group.name_size = 1;
1060 }
1061 if (ve->ve_all_targets) {
1062 ve->ve_target_group.name[0] = '*';
1063 ve->ve_target_group.name_size = 1;
1064 }
1065 if (ve->ve_ndx_valid)
1066 veid = ve->ve_ndx;
1067 else
1068 veid = 0xffffffff;
1069 mutex_enter(&stmf_state.stmf_lock);
1070 if (cmd == STMF_IOCTL_ADD_VIEW_ENTRY) {
1071 ret = stmf_add_ve(ve->ve_host_group.name,
1072 ve->ve_host_group.name_size,
1073 ve->ve_target_group.name,
1074 ve->ve_target_group.name_size,
1075 ve->ve_guid,
1076 &veid,
1077 ve->ve_lu_nbr,
1078 &iocd->stmf_error);
1079 } else { /* STMF_IOCTL_VALIDATE_VIEW */
1080 ret = stmf_validate_lun_ve(ve->ve_host_group.name,
1081 ve->ve_host_group.name_size,
1082 ve->ve_target_group.name,
1083 ve->ve_target_group.name_size,
1084 ve->ve_lu_nbr,
1085 &iocd->stmf_error);
1086 }
1087 mutex_exit(&stmf_state.stmf_lock);
1088 if (ret == 0 &&
1089 (!ve->ve_ndx_valid || !ve->ve_lu_number_valid) &&
1090 iocd->stmf_obuf_size >= sizeof (stmf_view_op_entry_t)) {
1091 stmf_view_op_entry_t *ve_ret =
1092 (stmf_view_op_entry_t *)obuf;
1093 iocd->stmf_obuf_nentries = 1;
1094 iocd->stmf_obuf_max_nentries = 1;
1095 if (!ve->ve_ndx_valid) {
1096 ve_ret->ve_ndx = veid;
1097 ve_ret->ve_ndx_valid = 1;
1098 }
1099 if (!ve->ve_lu_number_valid) {
1100 ve_ret->ve_lu_number_valid = 1;
1101 bcopy(ve->ve_lu_nbr, ve_ret->ve_lu_nbr, 8);
1102 }
1103 }
1104 break;
1105 case STMF_IOCTL_REMOVE_VIEW_ENTRY:
1106 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
1107 ret = EACCES;
1108 iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
1109 break;
1110 }
1111 ve = (stmf_view_op_entry_t *)ibuf;
1112 if ((ibuf == NULL) ||
1113 (iocd->stmf_ibuf_size < sizeof (stmf_view_op_entry_t))) {
1114 ret = EINVAL;
1115 break;
1116 }
1117 if (!ve->ve_ndx_valid) {
1118 ret = EINVAL;
1119 break;
1120 }
1121 mutex_enter(&stmf_state.stmf_lock);
1122 ret = stmf_remove_ve_by_id(ve->ve_guid, ve->ve_ndx,
1123 &iocd->stmf_error);
1124 mutex_exit(&stmf_state.stmf_lock);
1125 break;
1126 case STMF_IOCTL_GET_HG_LIST:
1127 id_list = &stmf_state.stmf_hg_list;
1128 /* FALLTHROUGH */
1129 case STMF_IOCTL_GET_TG_LIST:
1130 if (cmd == STMF_IOCTL_GET_TG_LIST)
1131 id_list = &stmf_state.stmf_tg_list;
1132 mutex_enter(&stmf_state.stmf_lock);
1133 iocd->stmf_obuf_max_nentries = id_list->id_count;
1134 n = min(id_list->id_count,
1135 (iocd->stmf_obuf_size)/sizeof (stmf_group_name_t));
1136 iocd->stmf_obuf_nentries = n;
1137 id_entry = id_list->idl_head;
1138 grpname = (stmf_group_name_t *)obuf;
1139 for (i = 0; i < n; i++) {
1140 if (id_entry->id_data[0] == '*') {
1141 if (iocd->stmf_obuf_nentries > 0) {
1142 iocd->stmf_obuf_nentries--;
1143 }
1144 id_entry = id_entry->id_next;
1145 continue;
1146 }
1147 grpname->name_size = id_entry->id_data_size;
1148 bcopy(id_entry->id_data, grpname->name,
1149 id_entry->id_data_size);
1150 grpname++;
1151 id_entry = id_entry->id_next;
1152 }
1153 mutex_exit(&stmf_state.stmf_lock);
1154 break;
1155 case STMF_IOCTL_GET_HG_ENTRIES:
1156 id_list = &stmf_state.stmf_hg_list;
1157 /* FALLTHROUGH */
1158 case STMF_IOCTL_GET_TG_ENTRIES:
1159 grpname = (stmf_group_name_t *)ibuf;
1160 if ((ibuf == NULL) ||
1161 (iocd->stmf_ibuf_size < sizeof (stmf_group_name_t))) {
1162 ret = EINVAL;
1163 break;
1164 }
1165 if (cmd == STMF_IOCTL_GET_TG_ENTRIES) {
1166 id_list = &stmf_state.stmf_tg_list;
1167 }
1168 mutex_enter(&stmf_state.stmf_lock);
1169 id_entry = stmf_lookup_id(id_list, grpname->name_size,
1170 grpname->name);
1171 if (!id_entry)
1172 ret = ENODEV;
1173 else {
1174 stmf_ge_ident_t *grp_entry;
1175 id_list = (stmf_id_list_t *)id_entry->id_impl_specific;
1176 iocd->stmf_obuf_max_nentries = id_list->id_count;
1177 n = min(id_list->id_count,
1178 iocd->stmf_obuf_size/sizeof (stmf_ge_ident_t));
1179 iocd->stmf_obuf_nentries = n;
1180 id_entry = id_list->idl_head;
1181 grp_entry = (stmf_ge_ident_t *)obuf;
1182 for (i = 0; i < n; i++) {
1183 bcopy(id_entry->id_data, grp_entry->ident,
1184 id_entry->id_data_size);
1185 grp_entry->ident_size = id_entry->id_data_size;
1186 id_entry = id_entry->id_next;
1187 grp_entry++;
1188 }
1189 }
1190 mutex_exit(&stmf_state.stmf_lock);
1191 break;
1192
1193 case STMF_IOCTL_GET_VE_LIST:
1194 n = iocd->stmf_obuf_size/sizeof (stmf_view_op_entry_t);
1195 mutex_enter(&stmf_state.stmf_lock);
1196 ve = (stmf_view_op_entry_t *)obuf;
1197 for (id_entry = stmf_state.stmf_luid_list.idl_head;
1198 id_entry; id_entry = id_entry->id_next) {
1199 for (view_entry = (stmf_view_entry_t *)
1200 id_entry->id_impl_specific; view_entry;
1201 view_entry = view_entry->ve_next) {
1202 iocd->stmf_obuf_max_nentries++;
1203 if (iocd->stmf_obuf_nentries >= n)
1204 continue;
1205 ve->ve_ndx_valid = 1;
1206 ve->ve_ndx = view_entry->ve_id;
1207 ve->ve_lu_number_valid = 1;
1208 bcopy(view_entry->ve_lun, ve->ve_lu_nbr, 8);
1209 bcopy(view_entry->ve_luid->id_data, ve->ve_guid,
1210 view_entry->ve_luid->id_data_size);
1211 if (view_entry->ve_hg->id_data[0] == '*') {
1212 ve->ve_all_hosts = 1;
1213 } else {
1214 bcopy(view_entry->ve_hg->id_data,
1215 ve->ve_host_group.name,
1216 view_entry->ve_hg->id_data_size);
1217 ve->ve_host_group.name_size =
1218 view_entry->ve_hg->id_data_size;
1219 }
1220
1221 if (view_entry->ve_tg->id_data[0] == '*') {
1222 ve->ve_all_targets = 1;
1223 } else {
1224 bcopy(view_entry->ve_tg->id_data,
1225 ve->ve_target_group.name,
1226 view_entry->ve_tg->id_data_size);
1227 ve->ve_target_group.name_size =
1228 view_entry->ve_tg->id_data_size;
1229 }
1230 ve++;
1231 iocd->stmf_obuf_nentries++;
1232 }
1233 }
1234 mutex_exit(&stmf_state.stmf_lock);
1235 break;
1236
1237 case STMF_IOCTL_LU_VE_LIST:
1238 p_id = (uint8_t *)ibuf;
1239 if ((iocd->stmf_ibuf_size != 16) ||
1240 (iocd->stmf_obuf_size < sizeof (stmf_view_op_entry_t))) {
1241 ret = EINVAL;
1242 break;
1243 }
1244
1245 n = iocd->stmf_obuf_size/sizeof (stmf_view_op_entry_t);
1246 mutex_enter(&stmf_state.stmf_lock);
1247 ve = (stmf_view_op_entry_t *)obuf;
1248 for (id_entry = stmf_state.stmf_luid_list.idl_head;
1249 id_entry; id_entry = id_entry->id_next) {
1250 if (bcmp(id_entry->id_data, p_id, 16) != 0)
1251 continue;
1252 for (view_entry = (stmf_view_entry_t *)
1253 id_entry->id_impl_specific; view_entry;
1254 view_entry = view_entry->ve_next) {
1255 iocd->stmf_obuf_max_nentries++;
1256 if (iocd->stmf_obuf_nentries >= n)
1257 continue;
1258 ve->ve_ndx_valid = 1;
1259 ve->ve_ndx = view_entry->ve_id;
1260 ve->ve_lu_number_valid = 1;
1261 bcopy(view_entry->ve_lun, ve->ve_lu_nbr, 8);
1262 bcopy(view_entry->ve_luid->id_data, ve->ve_guid,
1263 view_entry->ve_luid->id_data_size);
1264 if (view_entry->ve_hg->id_data[0] == '*') {
1265 ve->ve_all_hosts = 1;
1266 } else {
1267 bcopy(view_entry->ve_hg->id_data,
1268 ve->ve_host_group.name,
1269 view_entry->ve_hg->id_data_size);
1270 ve->ve_host_group.name_size =
1271 view_entry->ve_hg->id_data_size;
1272 }
1273
1274 if (view_entry->ve_tg->id_data[0] == '*') {
1275 ve->ve_all_targets = 1;
1276 } else {
1277 bcopy(view_entry->ve_tg->id_data,
1278 ve->ve_target_group.name,
1279 view_entry->ve_tg->id_data_size);
1280 ve->ve_target_group.name_size =
1281 view_entry->ve_tg->id_data_size;
1282 }
1283 ve++;
1284 iocd->stmf_obuf_nentries++;
1285 }
1286 break;
1287 }
1288 mutex_exit(&stmf_state.stmf_lock);
1289 break;
1290
1291 case STMF_IOCTL_LOAD_PP_DATA:
1292 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
1293 ret = EACCES;
1294 iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
1295 break;
1296 }
1297 ppi = (stmf_ppioctl_data_t *)ibuf;
1298 if ((ppi == NULL) ||
1299 (iocd->stmf_ibuf_size < sizeof (stmf_ppioctl_data_t))) {
1300 ret = EINVAL;
1301 break;
1302 }
1303 /* returned token */
1304 ppi_token = (uint64_t *)obuf;
1305 if ((ppi_token == NULL) ||
1306 (iocd->stmf_obuf_size < sizeof (uint64_t))) {
1307 ret = EINVAL;
1308 break;
1309 }
1310 ret = stmf_load_ppd_ioctl(ppi, ppi_token, &iocd->stmf_error);
1311 break;
1312
1313 case STMF_IOCTL_GET_PP_DATA:
1314 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
1315 ret = EACCES;
1316 iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
1317 break;
1318 }
1319 ppi = (stmf_ppioctl_data_t *)ibuf;
1320 if (ppi == NULL ||
1321 (iocd->stmf_ibuf_size < sizeof (stmf_ppioctl_data_t))) {
1322 ret = EINVAL;
1323 break;
1324 }
1325 ppi_out = (stmf_ppioctl_data_t *)obuf;
1326 if ((ppi_out == NULL) ||
1327 (iocd->stmf_obuf_size < sizeof (stmf_ppioctl_data_t))) {
1328 ret = EINVAL;
1329 break;
1330 }
1331 ret = stmf_get_ppd_ioctl(ppi, ppi_out, &iocd->stmf_error);
1332 break;
1333
1334 case STMF_IOCTL_CLEAR_PP_DATA:
1335 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
1336 ret = EACCES;
1337 iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
1338 break;
1339 }
1340 ppi = (stmf_ppioctl_data_t *)ibuf;
1341 if ((ppi == NULL) ||
1342 (iocd->stmf_ibuf_size < sizeof (stmf_ppioctl_data_t))) {
1343 ret = EINVAL;
1344 break;
1345 }
1346 ret = stmf_delete_ppd_ioctl(ppi);
1347 break;
1348
1349 case STMF_IOCTL_CLEAR_TRACE:
1350 stmf_trace_clear();
1351 break;
1352
1353 case STMF_IOCTL_ADD_TRACE:
1354 if (iocd->stmf_ibuf_size && ibuf) {
1355 ((uint8_t *)ibuf)[iocd->stmf_ibuf_size - 1] = 0;
1356 stmf_trace("\nstradm", "%s\n", ibuf);
1357 }
1358 break;
1359
1360 case STMF_IOCTL_GET_TRACE_POSITION:
1361 if (obuf && (iocd->stmf_obuf_size > 3)) {
1362 mutex_enter(&trace_buf_lock);
1363 *((int *)obuf) = trace_buf_curndx;
1364 mutex_exit(&trace_buf_lock);
1365 } else {
1366 ret = EINVAL;
1367 }
1368 break;
1369
1370 case STMF_IOCTL_GET_TRACE:
1371 if ((iocd->stmf_obuf_size == 0) || (iocd->stmf_ibuf_size < 4)) {
1372 ret = EINVAL;
1373 break;
1374 }
1375 i = *((int *)ibuf);
1376 if ((i > trace_buf_size) || ((i + iocd->stmf_obuf_size) >
1377 trace_buf_size)) {
1378 ret = EINVAL;
1379 break;
1380 }
1381 mutex_enter(&trace_buf_lock);
1382 bcopy(stmf_trace_buf + i, obuf, iocd->stmf_obuf_size);
1383 mutex_exit(&trace_buf_lock);
1384 break;
1385
1386 default:
1387 ret = ENOTTY;
1388 }
1389
1390 if (ret == 0) {
1391 ret = stmf_copyout_iocdata(data, mode, iocd, obuf);
1392 } else if (iocd->stmf_error) {
1393 (void) stmf_copyout_iocdata(data, mode, iocd, obuf);
1394 }
1395 if (obuf) {
1396 kmem_free(obuf, iocd->stmf_obuf_size);
1397 obuf = NULL;
1398 }
1399 if (ibuf) {
1400 kmem_free(ibuf, iocd->stmf_ibuf_size);
1401 ibuf = NULL;
1402 }
1403 kmem_free(iocd, sizeof (stmf_iocdata_t));
1404 return (ret);
1405 }
1406
1407 static int
1408 stmf_get_service_state()
1409 {
1410 stmf_i_local_port_t *ilport;
1411 stmf_i_lu_t *ilu;
1412 int online = 0;
1413 int offline = 0;
1414 int onlining = 0;
1415 int offlining = 0;
1416
1417 ASSERT(mutex_owned(&stmf_state.stmf_lock));
1418 for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
1419 ilport = ilport->ilport_next) {
1420 if (ilport->ilport_state == STMF_STATE_OFFLINE)
1421 offline++;
1422 else if (ilport->ilport_state == STMF_STATE_ONLINE)
1423 online++;
1424 else if (ilport->ilport_state == STMF_STATE_ONLINING)
1425 onlining++;
1426 else if (ilport->ilport_state == STMF_STATE_OFFLINING)
1427 offlining++;
1428 }
1429
1430 for (ilu = stmf_state.stmf_ilulist; ilu != NULL;
1431 ilu = ilu->ilu_next) {
1432 if (ilu->ilu_state == STMF_STATE_OFFLINE)
1433 offline++;
1434 else if (ilu->ilu_state == STMF_STATE_ONLINE)
1435 online++;
1436 else if (ilu->ilu_state == STMF_STATE_ONLINING)
1437 onlining++;
1438 else if (ilu->ilu_state == STMF_STATE_OFFLINING)
1439 offlining++;
1440 }
1441
1442 if (stmf_state.stmf_service_running) {
1443 if (onlining)
1444 return (STMF_STATE_ONLINING);
1445 else
1446 return (STMF_STATE_ONLINE);
1447 }
1448
1449 if (offlining) {
1450 return (STMF_STATE_OFFLINING);
1451 }
1452
1453 return (STMF_STATE_OFFLINE);
1454 }
1455
1456 static int
1457 stmf_set_stmf_state(stmf_state_desc_t *std)
1458 {
1459 stmf_i_local_port_t *ilport;
1460 stmf_i_lu_t *ilu;
1461 stmf_state_change_info_t ssi;
1462 int svc_state;
1463
1464 ssi.st_rflags = STMF_RFLAG_USER_REQUEST;
1465 ssi.st_additional_info = NULL;
1466
1467 mutex_enter(&stmf_state.stmf_lock);
1468 if (!stmf_state.stmf_exclusive_open) {
1469 mutex_exit(&stmf_state.stmf_lock);
1470 return (EACCES);
1471 }
1472
1473 if (stmf_state.stmf_inventory_locked) {
1474 mutex_exit(&stmf_state.stmf_lock);
1475 return (EBUSY);
1476 }
1477
1478 if ((std->state != STMF_STATE_ONLINE) &&
1479 (std->state != STMF_STATE_OFFLINE)) {
1480 mutex_exit(&stmf_state.stmf_lock);
1481 return (EINVAL);
1482 }
1483
1484 svc_state = stmf_get_service_state();
1485 if ((svc_state == STMF_STATE_OFFLINING) ||
1486 (svc_state == STMF_STATE_ONLINING)) {
1487 mutex_exit(&stmf_state.stmf_lock);
1488 return (EBUSY);
1489 }
1490
1491 if (svc_state == STMF_STATE_OFFLINE) {
1492 if (std->config_state == STMF_CONFIG_INIT) {
1493 if (std->state != STMF_STATE_OFFLINE) {
1494 mutex_exit(&stmf_state.stmf_lock);
1495 return (EINVAL);
1496 }
1497 stmf_state.stmf_config_state = STMF_CONFIG_INIT;
1498 stmf_delete_all_ppds();
1499 stmf_view_clear_config();
1500 stmf_view_init();
1501 mutex_exit(&stmf_state.stmf_lock);
1502 return (0);
1503 }
1504 if ((stmf_state.stmf_config_state == STMF_CONFIG_INIT) ||
1505 (stmf_state.stmf_config_state == STMF_CONFIG_NONE)) {
1506 if (std->config_state != STMF_CONFIG_INIT_DONE) {
1507 mutex_exit(&stmf_state.stmf_lock);
1508 return (EINVAL);
1509 }
1510 stmf_state.stmf_config_state = STMF_CONFIG_INIT_DONE;
1511 }
1512 if (std->state == STMF_STATE_OFFLINE) {
1513 mutex_exit(&stmf_state.stmf_lock);
1514 return (0);
1515 }
1516 if (stmf_state.stmf_config_state == STMF_CONFIG_INIT) {
1517 mutex_exit(&stmf_state.stmf_lock);
1518 return (EINVAL);
1519 }
1520 stmf_state.stmf_inventory_locked = 1;
1521 stmf_state.stmf_service_running = 1;
1522 mutex_exit(&stmf_state.stmf_lock);
1523
1524 for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
1525 ilport = ilport->ilport_next) {
1526 if (stmf_state.stmf_default_lport_state !=
1527 STMF_STATE_ONLINE)
1528 continue;
1529 (void) stmf_ctl(STMF_CMD_LPORT_ONLINE,
1530 ilport->ilport_lport, &ssi);
1531 }
1532
1533 for (ilu = stmf_state.stmf_ilulist; ilu != NULL;
1534 ilu = ilu->ilu_next) {
1535 if (stmf_state.stmf_default_lu_state !=
1536 STMF_STATE_ONLINE)
1537 continue;
1538 (void) stmf_ctl(STMF_CMD_LU_ONLINE, ilu->ilu_lu, &ssi);
1539 }
1540 mutex_enter(&stmf_state.stmf_lock);
1541 stmf_state.stmf_inventory_locked = 0;
1542 mutex_exit(&stmf_state.stmf_lock);
1543 return (0);
1544 }
1545
1546 /* svc_state is STMF_STATE_ONLINE here */
1547 if ((std->state != STMF_STATE_OFFLINE) ||
1548 (std->config_state == STMF_CONFIG_INIT)) {
1549 mutex_exit(&stmf_state.stmf_lock);
1550 return (EACCES);
1551 }
1552
1553 stmf_state.stmf_inventory_locked = 1;
1554 stmf_state.stmf_service_running = 0;
1555
1556 mutex_exit(&stmf_state.stmf_lock);
1557 for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
1558 ilport = ilport->ilport_next) {
1559 if (ilport->ilport_state != STMF_STATE_ONLINE)
1560 continue;
1561 (void) stmf_ctl(STMF_CMD_LPORT_OFFLINE,
1562 ilport->ilport_lport, &ssi);
1563 }
1564
1565 for (ilu = stmf_state.stmf_ilulist; ilu != NULL;
1566 ilu = ilu->ilu_next) {
1567 if (ilu->ilu_state != STMF_STATE_ONLINE)
1568 continue;
1569 (void) stmf_ctl(STMF_CMD_LU_OFFLINE, ilu->ilu_lu, &ssi);
1570 }
1571 mutex_enter(&stmf_state.stmf_lock);
1572 stmf_state.stmf_inventory_locked = 0;
1573 mutex_exit(&stmf_state.stmf_lock);
1574 return (0);
1575 }
1576
1577 static int
1578 stmf_get_stmf_state(stmf_state_desc_t *std)
1579 {
1580 mutex_enter(&stmf_state.stmf_lock);
1581 std->state = stmf_get_service_state();
1582 std->config_state = stmf_state.stmf_config_state;
1583 mutex_exit(&stmf_state.stmf_lock);
1584
1585 return (0);
1586 }
1587
1588 /*
1589 * handles registration message from pppt for a logical unit
1590 */
1591 stmf_status_t
1592 stmf_ic_lu_reg(stmf_ic_reg_dereg_lun_msg_t *msg, uint32_t type)
1593 {
1594 stmf_i_lu_provider_t *ilp;
1595 stmf_lu_provider_t *lp;
1596 mutex_enter(&stmf_state.stmf_lock);
1597 for (ilp = stmf_state.stmf_ilplist; ilp != NULL; ilp = ilp->ilp_next) {
1598 if (strcmp(msg->icrl_lu_provider_name,
1599 ilp->ilp_lp->lp_name) == 0) {
1600 lp = ilp->ilp_lp;
1601 mutex_exit(&stmf_state.stmf_lock);
1602 lp->lp_proxy_msg(msg->icrl_lun_id, msg->icrl_cb_arg,
1603 msg->icrl_cb_arg_len, type);
1604 return (STMF_SUCCESS);
1605 }
1606 }
1607 mutex_exit(&stmf_state.stmf_lock);
1608 return (STMF_SUCCESS);
1609 }
1610
1611 /*
1612 * handles de-registration message from pppt for a logical unit
1613 */
1614 stmf_status_t
1615 stmf_ic_lu_dereg(stmf_ic_reg_dereg_lun_msg_t *msg)
1616 {
1617 stmf_i_lu_provider_t *ilp;
1618 stmf_lu_provider_t *lp;
1619 mutex_enter(&stmf_state.stmf_lock);
1620 for (ilp = stmf_state.stmf_ilplist; ilp != NULL; ilp = ilp->ilp_next) {
1621 if (strcmp(msg->icrl_lu_provider_name,
1622 ilp->ilp_lp->lp_name) == 0) {
1623 lp = ilp->ilp_lp;
1624 mutex_exit(&stmf_state.stmf_lock);
1625 lp->lp_proxy_msg(msg->icrl_lun_id, NULL, 0,
1626 STMF_MSG_LU_DEREGISTER);
1627 return (STMF_SUCCESS);
1628 }
1629 }
1630 mutex_exit(&stmf_state.stmf_lock);
1631 return (STMF_SUCCESS);
1632 }
1633
1634 /*
1635 * helper function to find a task that matches a task_msgid
1636 */
1637 scsi_task_t *
1638 find_task_from_msgid(uint8_t *lu_id, stmf_ic_msgid_t task_msgid)
1639 {
1640 stmf_i_lu_t *ilu;
1641 stmf_i_scsi_task_t *itask;
1642
1643 mutex_enter(&stmf_state.stmf_lock);
1644 for (ilu = stmf_state.stmf_ilulist; ilu != NULL; ilu = ilu->ilu_next) {
1645 if (bcmp(lu_id, ilu->ilu_lu->lu_id->ident, 16) == 0) {
1646 break;
1647 }
1648 }
1649
1650 if (ilu == NULL) {
1651 mutex_exit(&stmf_state.stmf_lock);
1652 return (NULL);
1653 }
1654
1655 mutex_enter(&ilu->ilu_task_lock);
1656 for (itask = ilu->ilu_tasks; itask != NULL;
1657 itask = itask->itask_lu_next) {
1658 if (itask->itask_flags & (ITASK_IN_FREE_LIST |
1659 ITASK_BEING_ABORTED)) {
1660 continue;
1661 }
1662 if (itask->itask_proxy_msg_id == task_msgid) {
1663 break;
1664 }
1665 }
1666 mutex_exit(&ilu->ilu_task_lock);
1667 mutex_exit(&stmf_state.stmf_lock);
1668
1669 if (itask != NULL) {
1670 return (itask->itask_task);
1671 } else {
1672 /* task not found. Likely already aborted. */
1673 return (NULL);
1674 }
1675 }
1676
1677 /*
1678 * message received from pppt/ic
1679 */
1680 stmf_status_t
1681 stmf_msg_rx(stmf_ic_msg_t *msg)
1682 {
1683 mutex_enter(&stmf_state.stmf_lock);
1684 if (stmf_state.stmf_alua_state != 1) {
1685 mutex_exit(&stmf_state.stmf_lock);
1686 cmn_err(CE_WARN, "stmf alua state is disabled");
1687 ic_msg_free(msg);
1688 return (STMF_FAILURE);
1689 }
1690 mutex_exit(&stmf_state.stmf_lock);
1691
1692 switch (msg->icm_msg_type) {
1693 case STMF_ICM_REGISTER_LUN:
1694 (void) stmf_ic_lu_reg(
1695 (stmf_ic_reg_dereg_lun_msg_t *)msg->icm_msg,
1696 STMF_MSG_LU_REGISTER);
1697 break;
1698 case STMF_ICM_LUN_ACTIVE:
1699 (void) stmf_ic_lu_reg(
1700 (stmf_ic_reg_dereg_lun_msg_t *)msg->icm_msg,
1701 STMF_MSG_LU_ACTIVE);
1702 break;
1703 case STMF_ICM_DEREGISTER_LUN:
1704 (void) stmf_ic_lu_dereg(
1705 (stmf_ic_reg_dereg_lun_msg_t *)msg->icm_msg);
1706 break;
1707 case STMF_ICM_SCSI_DATA:
1708 (void) stmf_ic_rx_scsi_data(
1709 (stmf_ic_scsi_data_msg_t *)msg->icm_msg);
1710 break;
1711 case STMF_ICM_SCSI_STATUS:
1712 (void) stmf_ic_rx_scsi_status(
1713 (stmf_ic_scsi_status_msg_t *)msg->icm_msg);
1714 break;
1715 case STMF_ICM_STATUS:
1716 (void) stmf_ic_rx_status(
1717 (stmf_ic_status_msg_t *)msg->icm_msg);
1718 break;
1719 default:
1720 cmn_err(CE_WARN, "unknown message received %d",
1721 msg->icm_msg_type);
1722 ic_msg_free(msg);
1723 return (STMF_FAILURE);
1724 }
1725 ic_msg_free(msg);
1726 return (STMF_SUCCESS);
1727 }
1728
1729 stmf_status_t
1730 stmf_ic_rx_status(stmf_ic_status_msg_t *msg)
1731 {
1732 stmf_i_local_port_t *ilport;
1733
1734 if (msg->ics_msg_type != STMF_ICM_REGISTER_PROXY_PORT) {
1735 /* for now, ignore other message status */
1736 return (STMF_SUCCESS);
1737 }
1738
1739 if (msg->ics_status != STMF_SUCCESS) {
1740 return (STMF_SUCCESS);
1741 }
1742
1743 mutex_enter(&stmf_state.stmf_lock);
1744 for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
1745 ilport = ilport->ilport_next) {
1746 if (msg->ics_msgid == ilport->ilport_reg_msgid) {
1747 ilport->ilport_proxy_registered = 1;
1748 break;
1749 }
1750 }
1751 mutex_exit(&stmf_state.stmf_lock);
1752 return (STMF_SUCCESS);
1753 }
1754
1755 /*
1756 * handles scsi status message from pppt
1757 */
1758 stmf_status_t
1759 stmf_ic_rx_scsi_status(stmf_ic_scsi_status_msg_t *msg)
1760 {
1761 scsi_task_t *task;
1762
1763 /* is this a task management command */
1764 if (msg->icss_task_msgid & MSG_ID_TM_BIT) {
1765 return (STMF_SUCCESS);
1766 }
1767
1768 task = find_task_from_msgid(msg->icss_lun_id, msg->icss_task_msgid);
1769
1770 if (task == NULL) {
1771 return (STMF_SUCCESS);
1772 }
1773
1774 task->task_scsi_status = msg->icss_status;
1775 task->task_sense_data = msg->icss_sense;
1776 task->task_sense_length = msg->icss_sense_len;
1777 (void) stmf_send_scsi_status(task, STMF_IOF_LU_DONE);
1778
1779 return (STMF_SUCCESS);
1780 }
1781
1782 /*
1783 * handles scsi data message from pppt
1784 */
1785 stmf_status_t
1786 stmf_ic_rx_scsi_data(stmf_ic_scsi_data_msg_t *msg)
1787 {
1788 stmf_i_scsi_task_t *itask;
1789 scsi_task_t *task;
1790 stmf_xfer_data_t *xd = NULL;
1791 stmf_data_buf_t *dbuf;
1792 uint32_t sz, minsz, xd_sz, asz;
1793
1794 /* is this a task management command */
1795 if (msg->icsd_task_msgid & MSG_ID_TM_BIT) {
1796 return (STMF_SUCCESS);
1797 }
1798
1799 task = find_task_from_msgid(msg->icsd_lun_id, msg->icsd_task_msgid);
1800 if (task == NULL) {
1801 stmf_ic_msg_t *ic_xfer_done_msg = NULL;
1802 static uint64_t data_msg_id;
1803 stmf_status_t ic_ret = STMF_FAILURE;
1804 mutex_enter(&stmf_state.stmf_lock);
1805 data_msg_id = stmf_proxy_msg_id++;
1806 mutex_exit(&stmf_state.stmf_lock);
1807 /*
1808 * send xfer done status to pppt
1809 * for now, set the session id to 0 as we cannot
1810 * ascertain it since we cannot find the task
1811 */
1812 ic_xfer_done_msg = ic_scsi_data_xfer_done_msg_alloc(
1813 msg->icsd_task_msgid, 0, STMF_FAILURE, data_msg_id);
1814 if (ic_xfer_done_msg) {
1815 ic_ret = ic_tx_msg(ic_xfer_done_msg);
1816 if (ic_ret != STMF_IC_MSG_SUCCESS) {
1817 cmn_err(CE_WARN, "unable to xmit proxy msg");
1818 }
1819 }
1820 return (STMF_FAILURE);
1821 }
1822
1823 itask = (stmf_i_scsi_task_t *)task->task_stmf_private;
1824 dbuf = itask->itask_proxy_dbuf;
1825
1826 task->task_cmd_xfer_length += msg->icsd_data_len;
1827
1828 if (task->task_additional_flags &
1829 TASK_AF_NO_EXPECTED_XFER_LENGTH) {
1830 task->task_expected_xfer_length =
1831 task->task_cmd_xfer_length;
1832 }
1833
1834 sz = min(task->task_expected_xfer_length,
1835 task->task_cmd_xfer_length);
1836
1837 xd_sz = msg->icsd_data_len;
1838 asz = xd_sz + sizeof (*xd) - 4;
1839 xd = (stmf_xfer_data_t *)kmem_zalloc(asz, KM_NOSLEEP);
1840
1841 if (xd == NULL) {
1842 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
1843 STMF_ALLOC_FAILURE, NULL);
1844 return (STMF_FAILURE);
1845 }
1846
1847 xd->alloc_size = asz;
1848 xd->size_left = xd_sz;
1849 bcopy(msg->icsd_data, xd->buf, xd_sz);
1850
1851 sz = min(sz, xd->size_left);
1852 xd->size_left = sz;
1853 minsz = min(512, sz);
1854
1855 if (dbuf == NULL)
1856 dbuf = stmf_alloc_dbuf(task, sz, &minsz, 0);
1857 if (dbuf == NULL) {
1858 kmem_free(xd, xd->alloc_size);
1859 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
1860 STMF_ALLOC_FAILURE, NULL);
1861 return (STMF_FAILURE);
1862 }
1863 dbuf->db_lu_private = xd;
1864 dbuf->db_relative_offset = task->task_nbytes_transferred;
1865 stmf_xd_to_dbuf(dbuf, 0);
1866
1867 dbuf->db_flags = DB_DIRECTION_TO_RPORT;
1868 (void) stmf_xfer_data(task, dbuf, 0);
1869 return (STMF_SUCCESS);
1870 }
1871
1872 stmf_status_t
1873 stmf_proxy_scsi_cmd(scsi_task_t *task, stmf_data_buf_t *dbuf)
1874 {
1875 stmf_i_scsi_task_t *itask =
1876 (stmf_i_scsi_task_t *)task->task_stmf_private;
1877 stmf_i_local_port_t *ilport =
1878 (stmf_i_local_port_t *)task->task_lport->lport_stmf_private;
1879 stmf_ic_msg_t *ic_cmd_msg;
1880 stmf_ic_msg_status_t ic_ret;
1881 stmf_status_t ret = STMF_FAILURE;
1882
1883 if (stmf_state.stmf_alua_state != 1) {
1884 cmn_err(CE_WARN, "stmf alua state is disabled");
1885 return (STMF_FAILURE);
1886 }
1887
1888 if (ilport->ilport_proxy_registered == 0) {
1889 return (STMF_FAILURE);
1890 }
1891
1892 mutex_enter(&stmf_state.stmf_lock);
1893 itask->itask_proxy_msg_id = stmf_proxy_msg_id++;
1894 mutex_exit(&stmf_state.stmf_lock);
1895 itask->itask_proxy_dbuf = dbuf;
1896
1897 /*
1898 * stmf will now take over the task handling for this task
1899 * but it still needs to be treated differently from other
1900 * default handled tasks, hence the ITASK_PROXY_TASK.
1901 * If this is a task management function, we're really just
1902 * duping the command to the peer. Set the TM bit so that
1903 * we can recognize this on return since we won't be completing
1904 * the proxied task in that case.
1905 */
1906 if (task->task_mgmt_function) {
1907 itask->itask_proxy_msg_id |= MSG_ID_TM_BIT;
1908 } else {
1909 uint32_t new, old;
1910 do {
1911 new = old = itask->itask_flags;
1912 if (new & ITASK_BEING_ABORTED)
1913 return (STMF_FAILURE);
1914 new |= ITASK_DEFAULT_HANDLING | ITASK_PROXY_TASK;
1915 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
1916 }
1917 if (dbuf) {
1918 ic_cmd_msg = ic_scsi_cmd_msg_alloc(itask->itask_proxy_msg_id,
1919 task, dbuf->db_data_size, dbuf->db_sglist[0].seg_addr,
1920 itask->itask_proxy_msg_id);
1921 } else {
1922 ic_cmd_msg = ic_scsi_cmd_msg_alloc(itask->itask_proxy_msg_id,
1923 task, 0, NULL, itask->itask_proxy_msg_id);
1924 }
1925 if (ic_cmd_msg) {
1926 ic_ret = ic_tx_msg(ic_cmd_msg);
1927 if (ic_ret == STMF_IC_MSG_SUCCESS) {
1928 ret = STMF_SUCCESS;
1929 }
1930 }
1931 return (ret);
1932 }
1933
1934
1935 stmf_status_t
1936 pppt_modload()
1937 {
1938 int error;
1939
1940 if (pppt_mod == NULL && ((pppt_mod =
1941 ddi_modopen("drv/pppt", KRTLD_MODE_FIRST, &error)) == NULL)) {
1942 cmn_err(CE_WARN, "Unable to load pppt");
1943 return (STMF_FAILURE);
1944 }
1945
1946 if (ic_reg_port_msg_alloc == NULL && ((ic_reg_port_msg_alloc =
1947 (stmf_ic_reg_port_msg_alloc_func_t)
1948 ddi_modsym(pppt_mod, "stmf_ic_reg_port_msg_alloc",
1949 &error)) == NULL)) {
1950 cmn_err(CE_WARN,
1951 "Unable to find symbol - stmf_ic_reg_port_msg_alloc");
1952 return (STMF_FAILURE);
1953 }
1954
1955
1956 if (ic_dereg_port_msg_alloc == NULL && ((ic_dereg_port_msg_alloc =
1957 (stmf_ic_dereg_port_msg_alloc_func_t)
1958 ddi_modsym(pppt_mod, "stmf_ic_dereg_port_msg_alloc",
1959 &error)) == NULL)) {
1960 cmn_err(CE_WARN,
1961 "Unable to find symbol - stmf_ic_dereg_port_msg_alloc");
1962 return (STMF_FAILURE);
1963 }
1964
1965 if (ic_reg_lun_msg_alloc == NULL && ((ic_reg_lun_msg_alloc =
1966 (stmf_ic_reg_lun_msg_alloc_func_t)
1967 ddi_modsym(pppt_mod, "stmf_ic_reg_lun_msg_alloc",
1968 &error)) == NULL)) {
1969 cmn_err(CE_WARN,
1970 "Unable to find symbol - stmf_ic_reg_lun_msg_alloc");
1971 return (STMF_FAILURE);
1972 }
1973
1974 if (ic_lun_active_msg_alloc == NULL && ((ic_lun_active_msg_alloc =
1975 (stmf_ic_lun_active_msg_alloc_func_t)
1976 ddi_modsym(pppt_mod, "stmf_ic_lun_active_msg_alloc",
1977 &error)) == NULL)) {
1978 cmn_err(CE_WARN,
1979 "Unable to find symbol - stmf_ic_lun_active_msg_alloc");
1980 return (STMF_FAILURE);
1981 }
1982
1983 if (ic_dereg_lun_msg_alloc == NULL && ((ic_dereg_lun_msg_alloc =
1984 (stmf_ic_dereg_lun_msg_alloc_func_t)
1985 ddi_modsym(pppt_mod, "stmf_ic_dereg_lun_msg_alloc",
1986 &error)) == NULL)) {
1987 cmn_err(CE_WARN,
1988 "Unable to find symbol - stmf_ic_dereg_lun_msg_alloc");
1989 return (STMF_FAILURE);
1990 }
1991
1992 if (ic_scsi_cmd_msg_alloc == NULL && ((ic_scsi_cmd_msg_alloc =
1993 (stmf_ic_scsi_cmd_msg_alloc_func_t)
1994 ddi_modsym(pppt_mod, "stmf_ic_scsi_cmd_msg_alloc",
1995 &error)) == NULL)) {
1996 cmn_err(CE_WARN,
1997 "Unable to find symbol - stmf_ic_scsi_cmd_msg_alloc");
1998 return (STMF_FAILURE);
1999 }
2000
2001 if (ic_scsi_data_xfer_done_msg_alloc == NULL &&
2002 ((ic_scsi_data_xfer_done_msg_alloc =
2003 (stmf_ic_scsi_data_xfer_done_msg_alloc_func_t)
2004 ddi_modsym(pppt_mod, "stmf_ic_scsi_data_xfer_done_msg_alloc",
2005 &error)) == NULL)) {
2006 cmn_err(CE_WARN,
2007 "Unable to find symbol -"
2008 "stmf_ic_scsi_data_xfer_done_msg_alloc");
2009 return (STMF_FAILURE);
2010 }
2011
2012 if (ic_session_reg_msg_alloc == NULL &&
2013 ((ic_session_reg_msg_alloc =
2014 (stmf_ic_session_create_msg_alloc_func_t)
2015 ddi_modsym(pppt_mod, "stmf_ic_session_create_msg_alloc",
2016 &error)) == NULL)) {
2017 cmn_err(CE_WARN,
2018 "Unable to find symbol -"
2019 "stmf_ic_session_create_msg_alloc");
2020 return (STMF_FAILURE);
2021 }
2022
2023 if (ic_session_dereg_msg_alloc == NULL &&
2024 ((ic_session_dereg_msg_alloc =
2025 (stmf_ic_session_destroy_msg_alloc_func_t)
2026 ddi_modsym(pppt_mod, "stmf_ic_session_destroy_msg_alloc",
2027 &error)) == NULL)) {
2028 cmn_err(CE_WARN,
2029 "Unable to find symbol -"
2030 "stmf_ic_session_destroy_msg_alloc");
2031 return (STMF_FAILURE);
2032 }
2033
2034 if (ic_tx_msg == NULL && ((ic_tx_msg =
2035 (stmf_ic_tx_msg_func_t)ddi_modsym(pppt_mod, "stmf_ic_tx_msg",
2036 &error)) == NULL)) {
2037 cmn_err(CE_WARN, "Unable to find symbol - stmf_ic_tx_msg");
2038 return (STMF_FAILURE);
2039 }
2040
2041 if (ic_msg_free == NULL && ((ic_msg_free =
2042 (stmf_ic_msg_free_func_t)ddi_modsym(pppt_mod, "stmf_ic_msg_free",
2043 &error)) == NULL)) {
2044 cmn_err(CE_WARN, "Unable to find symbol - stmf_ic_msg_free");
2045 return (STMF_FAILURE);
2046 }
2047 return (STMF_SUCCESS);
2048 }
2049
2050 static void
2051 stmf_get_alua_state(stmf_alua_state_desc_t *alua_state)
2052 {
2053 mutex_enter(&stmf_state.stmf_lock);
2054 alua_state->alua_node = stmf_state.stmf_alua_node;
2055 alua_state->alua_state = stmf_state.stmf_alua_state;
2056 mutex_exit(&stmf_state.stmf_lock);
2057 }
2058
2059
2060 static int
2061 stmf_set_alua_state(stmf_alua_state_desc_t *alua_state)
2062 {
2063 stmf_i_local_port_t *ilport;
2064 stmf_i_lu_t *ilu;
2065 stmf_lu_t *lu;
2066 stmf_ic_msg_status_t ic_ret;
2067 stmf_ic_msg_t *ic_reg_lun, *ic_reg_port;
2068 stmf_local_port_t *lport;
2069 int ret = 0;
2070
2071 if (alua_state->alua_state > 1 || alua_state->alua_node > 1) {
2072 return (EINVAL);
2073 }
2074
2075 mutex_enter(&stmf_state.stmf_lock);
2076 if (alua_state->alua_state == 1) {
2077 if (pppt_modload() == STMF_FAILURE) {
2078 ret = EIO;
2079 goto err;
2080 }
2081 if (alua_state->alua_node != 0) {
2082 /* reset existing rtpids to new base */
2083 stmf_rtpid_counter = 255;
2084 }
2085 stmf_state.stmf_alua_node = alua_state->alua_node;
2086 stmf_state.stmf_alua_state = 1;
2087 /* register existing local ports with ppp */
2088 for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
2089 ilport = ilport->ilport_next) {
2090 /* skip standby ports and non-alua participants */
2091 if (ilport->ilport_standby == 1 ||
2092 ilport->ilport_alua == 0) {
2093 continue;
2094 }
2095 if (alua_state->alua_node != 0) {
2096 ilport->ilport_rtpid =
2097 atomic_inc_16_nv(&stmf_rtpid_counter);
2098 }
2099 lport = ilport->ilport_lport;
2100 ic_reg_port = ic_reg_port_msg_alloc(
2101 lport->lport_id, ilport->ilport_rtpid,
2102 0, NULL, stmf_proxy_msg_id);
2103 if (ic_reg_port) {
2104 ic_ret = ic_tx_msg(ic_reg_port);
2105 if (ic_ret == STMF_IC_MSG_SUCCESS) {
2106 ilport->ilport_reg_msgid =
2107 stmf_proxy_msg_id++;
2108 } else {
2109 cmn_err(CE_WARN,
2110 "error on port registration "
2111 "port - %s",
2112 ilport->ilport_kstat_tgt_name);
2113 }
2114 }
2115 }
2116 /* register existing logical units */
2117 for (ilu = stmf_state.stmf_ilulist; ilu != NULL;
2118 ilu = ilu->ilu_next) {
2119 if (ilu->ilu_access != STMF_LU_ACTIVE) {
2120 continue;
2121 }
2122 /* register with proxy module */
2123 lu = ilu->ilu_lu;
2124 if (lu->lu_lp && lu->lu_lp->lp_lpif_rev == LPIF_REV_2 &&
2125 lu->lu_lp->lp_alua_support) {
2126 ilu->ilu_alua = 1;
2127 /* allocate the register message */
2128 ic_reg_lun = ic_reg_lun_msg_alloc(
2129 lu->lu_id->ident, lu->lu_lp->lp_name,
2130 lu->lu_proxy_reg_arg_len,
2131 (uint8_t *)lu->lu_proxy_reg_arg,
2132 stmf_proxy_msg_id);
2133 /* send the message */
2134 if (ic_reg_lun) {
2135 ic_ret = ic_tx_msg(ic_reg_lun);
2136 if (ic_ret == STMF_IC_MSG_SUCCESS) {
2137 stmf_proxy_msg_id++;
2138 }
2139 }
2140 }
2141 }
2142 } else {
2143 stmf_state.stmf_alua_state = 0;
2144 }
2145
2146 err:
2147 mutex_exit(&stmf_state.stmf_lock);
2148 return (ret);
2149 }
2150
2151
2152 typedef struct {
2153 void *bp; /* back pointer from internal struct to main struct */
2154 int alloc_size;
2155 } __istmf_t;
2156
2157 typedef struct {
2158 __istmf_t *fp; /* Framework private */
2159 void *cp; /* Caller private */
2160 void *ss; /* struct specific */
2161 } __stmf_t;
2162
2163 static struct {
2164 int shared;
2165 int fw_private;
2166 } stmf_sizes[] = { { 0, 0 },
2167 { GET_STRUCT_SIZE(stmf_lu_provider_t),
2168 GET_STRUCT_SIZE(stmf_i_lu_provider_t) },
2169 { GET_STRUCT_SIZE(stmf_port_provider_t),
2170 GET_STRUCT_SIZE(stmf_i_port_provider_t) },
2171 { GET_STRUCT_SIZE(stmf_local_port_t),
2172 GET_STRUCT_SIZE(stmf_i_local_port_t) },
2173 { GET_STRUCT_SIZE(stmf_lu_t),
2174 GET_STRUCT_SIZE(stmf_i_lu_t) },
2175 { GET_STRUCT_SIZE(stmf_scsi_session_t),
2176 GET_STRUCT_SIZE(stmf_i_scsi_session_t) },
2177 { GET_STRUCT_SIZE(scsi_task_t),
2178 GET_STRUCT_SIZE(stmf_i_scsi_task_t) },
2179 { GET_STRUCT_SIZE(stmf_data_buf_t),
2180 GET_STRUCT_SIZE(__istmf_t) },
2181 { GET_STRUCT_SIZE(stmf_dbuf_store_t),
2182 GET_STRUCT_SIZE(__istmf_t) }
2183
2184 };
2185
2186 void *
2187 stmf_alloc(stmf_struct_id_t struct_id, int additional_size, int flags)
2188 {
2189 int stmf_size;
2190 int kmem_flag;
2191 __stmf_t *sh;
2192
2193 if ((struct_id == 0) || (struct_id >= STMF_MAX_STRUCT_IDS))
2194 return (NULL);
2195
2196 if ((curthread->t_flag & T_INTR_THREAD) || (flags & AF_FORCE_NOSLEEP)) {
2197 kmem_flag = KM_NOSLEEP;
2198 } else {
2199 kmem_flag = KM_SLEEP;
2200 }
2201
2202 additional_size = (additional_size + 7) & (~7);
2203 stmf_size = stmf_sizes[struct_id].shared +
2204 stmf_sizes[struct_id].fw_private + additional_size;
2205
2206 if (flags & AF_DONTZERO)
2207 sh = (__stmf_t *)kmem_alloc(stmf_size, kmem_flag);
2208 else
2209 sh = (__stmf_t *)kmem_zalloc(stmf_size, kmem_flag);
2210
2211 if (sh == NULL)
2212 return (NULL);
2213
2214 /*
2215 * In principle, the implementation inside stmf_alloc should not
2216 * be changed anyway. But the original order of framework private
2217 * data and caller private data does not support sglist in the caller
2218 * private data.
2219 * To work around this, the memory segments of framework private
2220 * data and caller private data are re-ordered here.
2221 * A better solution is to provide a specific interface to allocate
2222 * the sglist, then we will not need this workaround any more.
2223 * But before the new interface is available, the memory segment
2224 * ordering should be kept as is.
2225 */
2226 sh->cp = GET_BYTE_OFFSET(sh, stmf_sizes[struct_id].shared);
2227 sh->fp = (__istmf_t *)GET_BYTE_OFFSET(sh,
2228 stmf_sizes[struct_id].shared + additional_size);
2229
2230 sh->fp->bp = sh;
2231 /* Just store the total size instead of storing additional size */
2232 sh->fp->alloc_size = stmf_size;
2233
2234 return (sh);
2235 }
2236
2237 void
2238 stmf_free(void *ptr)
2239 {
2240 __stmf_t *sh = (__stmf_t *)ptr;
2241
2242 /*
2243 * So far we dont need any struct specific processing. If such
2244 * a need ever arises, then store the struct id in the framework
2245 * private section and get it here as sh->fp->struct_id.
2246 */
2247 kmem_free(ptr, sh->fp->alloc_size);
2248 }
2249
2250 /*
2251 * Given a pointer to stmf_lu_t, verifies if this lu is registered with the
2252 * framework and returns a pointer to framework private data for the lu.
2253 * Returns NULL if the lu was not found.
2254 */
2255 stmf_i_lu_t *
2256 stmf_lookup_lu(stmf_lu_t *lu)
2257 {
2258 stmf_i_lu_t *ilu;
2259 ASSERT(mutex_owned(&stmf_state.stmf_lock));
2260
2261 for (ilu = stmf_state.stmf_ilulist; ilu != NULL; ilu = ilu->ilu_next) {
2262 if (ilu->ilu_lu == lu)
2263 return (ilu);
2264 }
2265 return (NULL);
2266 }
2267
2268 /*
2269 * Given a pointer to stmf_local_port_t, verifies if this lport is registered
2270 * with the framework and returns a pointer to framework private data for
2271 * the lport.
2272 * Returns NULL if the lport was not found.
2273 */
2274 stmf_i_local_port_t *
2275 stmf_lookup_lport(stmf_local_port_t *lport)
2276 {
2277 stmf_i_local_port_t *ilport;
2278 ASSERT(mutex_owned(&stmf_state.stmf_lock));
2279
2280 for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
2281 ilport = ilport->ilport_next) {
2282 if (ilport->ilport_lport == lport)
2283 return (ilport);
2284 }
2285 return (NULL);
2286 }
2287
2288 stmf_status_t
2289 stmf_register_lu_provider(stmf_lu_provider_t *lp)
2290 {
2291 stmf_i_lu_provider_t *ilp = (stmf_i_lu_provider_t *)lp->lp_stmf_private;
2292 stmf_pp_data_t *ppd;
2293 uint32_t cb_flags;
2294
2295 if (lp->lp_lpif_rev != LPIF_REV_1 && lp->lp_lpif_rev != LPIF_REV_2)
2296 return (STMF_FAILURE);
2297
2298 mutex_enter(&stmf_state.stmf_lock);
2299 ilp->ilp_next = stmf_state.stmf_ilplist;
2300 stmf_state.stmf_ilplist = ilp;
2301 stmf_state.stmf_nlps++;
2302
2303 /* See if we need to do a callback */
2304 for (ppd = stmf_state.stmf_ppdlist; ppd != NULL; ppd = ppd->ppd_next) {
2305 if (strcmp(ppd->ppd_name, lp->lp_name) == 0) {
2306 break;
2307 }
2308 }
2309 if ((ppd == NULL) || (ppd->ppd_nv == NULL)) {
2310 goto rlp_bail_out;
2311 }
2312 ilp->ilp_ppd = ppd;
2313 ppd->ppd_provider = ilp;
2314 if (lp->lp_cb == NULL)
2315 goto rlp_bail_out;
2316 ilp->ilp_cb_in_progress = 1;
2317 cb_flags = STMF_PCB_PREG_COMPLETE;
2318 if (stmf_state.stmf_config_state == STMF_CONFIG_INIT)
2319 cb_flags |= STMF_PCB_STMF_ONLINING;
2320 mutex_exit(&stmf_state.stmf_lock);
2321 lp->lp_cb(lp, STMF_PROVIDER_DATA_UPDATED, ppd->ppd_nv, cb_flags);
2322 mutex_enter(&stmf_state.stmf_lock);
2323 ilp->ilp_cb_in_progress = 0;
2324
2325 rlp_bail_out:
2326 mutex_exit(&stmf_state.stmf_lock);
2327
2328 return (STMF_SUCCESS);
2329 }
2330
2331 stmf_status_t
2332 stmf_deregister_lu_provider(stmf_lu_provider_t *lp)
2333 {
2334 stmf_i_lu_provider_t **ppilp;
2335 stmf_i_lu_provider_t *ilp = (stmf_i_lu_provider_t *)lp->lp_stmf_private;
2336
2337 mutex_enter(&stmf_state.stmf_lock);
2338 if (ilp->ilp_nlus || ilp->ilp_cb_in_progress) {
2339 mutex_exit(&stmf_state.stmf_lock);
2340 return (STMF_BUSY);
2341 }
2342 for (ppilp = &stmf_state.stmf_ilplist; *ppilp != NULL;
2343 ppilp = &((*ppilp)->ilp_next)) {
2344 if (*ppilp == ilp) {
2345 *ppilp = ilp->ilp_next;
2346 stmf_state.stmf_nlps--;
2347 if (ilp->ilp_ppd) {
2348 ilp->ilp_ppd->ppd_provider = NULL;
2349 ilp->ilp_ppd = NULL;
2350 }
2351 mutex_exit(&stmf_state.stmf_lock);
2352 return (STMF_SUCCESS);
2353 }
2354 }
2355 mutex_exit(&stmf_state.stmf_lock);
2356 return (STMF_NOT_FOUND);
2357 }
2358
2359 stmf_status_t
2360 stmf_register_port_provider(stmf_port_provider_t *pp)
2361 {
2362 stmf_i_port_provider_t *ipp =
2363 (stmf_i_port_provider_t *)pp->pp_stmf_private;
2364 stmf_pp_data_t *ppd;
2365 uint32_t cb_flags;
2366
2367 if (pp->pp_portif_rev != PORTIF_REV_1)
2368 return (STMF_FAILURE);
2369
2370 mutex_enter(&stmf_state.stmf_lock);
2371 ipp->ipp_next = stmf_state.stmf_ipplist;
2372 stmf_state.stmf_ipplist = ipp;
2373 stmf_state.stmf_npps++;
2374 /* See if we need to do a callback */
2375 for (ppd = stmf_state.stmf_ppdlist; ppd != NULL; ppd = ppd->ppd_next) {
2376 if (strcmp(ppd->ppd_name, pp->pp_name) == 0) {
2377 break;
2378 }
2379 }
2380 if ((ppd == NULL) || (ppd->ppd_nv == NULL)) {
2381 goto rpp_bail_out;
2382 }
2383 ipp->ipp_ppd = ppd;
2384 ppd->ppd_provider = ipp;
2385 if (pp->pp_cb == NULL)
2386 goto rpp_bail_out;
2387 ipp->ipp_cb_in_progress = 1;
2388 cb_flags = STMF_PCB_PREG_COMPLETE;
2389 if (stmf_state.stmf_config_state == STMF_CONFIG_INIT)
2390 cb_flags |= STMF_PCB_STMF_ONLINING;
2391 mutex_exit(&stmf_state.stmf_lock);
2392 pp->pp_cb(pp, STMF_PROVIDER_DATA_UPDATED, ppd->ppd_nv, cb_flags);
2393 mutex_enter(&stmf_state.stmf_lock);
2394 ipp->ipp_cb_in_progress = 0;
2395
2396 rpp_bail_out:
2397 mutex_exit(&stmf_state.stmf_lock);
2398
2399 return (STMF_SUCCESS);
2400 }
2401
2402 stmf_status_t
2403 stmf_deregister_port_provider(stmf_port_provider_t *pp)
2404 {
2405 stmf_i_port_provider_t *ipp =
2406 (stmf_i_port_provider_t *)pp->pp_stmf_private;
2407 stmf_i_port_provider_t **ppipp;
2408
2409 mutex_enter(&stmf_state.stmf_lock);
2410 if (ipp->ipp_npps || ipp->ipp_cb_in_progress) {
2411 mutex_exit(&stmf_state.stmf_lock);
2412 return (STMF_BUSY);
2413 }
2414 for (ppipp = &stmf_state.stmf_ipplist; *ppipp != NULL;
2415 ppipp = &((*ppipp)->ipp_next)) {
2416 if (*ppipp == ipp) {
2417 *ppipp = ipp->ipp_next;
2418 stmf_state.stmf_npps--;
2419 if (ipp->ipp_ppd) {
2420 ipp->ipp_ppd->ppd_provider = NULL;
2421 ipp->ipp_ppd = NULL;
2422 }
2423 mutex_exit(&stmf_state.stmf_lock);
2424 return (STMF_SUCCESS);
2425 }
2426 }
2427 mutex_exit(&stmf_state.stmf_lock);
2428 return (STMF_NOT_FOUND);
2429 }
2430
2431 int
2432 stmf_load_ppd_ioctl(stmf_ppioctl_data_t *ppi, uint64_t *ppi_token,
2433 uint32_t *err_ret)
2434 {
2435 stmf_i_port_provider_t *ipp;
2436 stmf_i_lu_provider_t *ilp;
2437 stmf_pp_data_t *ppd;
2438 nvlist_t *nv;
2439 int s;
2440 int ret;
2441
2442 *err_ret = 0;
2443
2444 if ((ppi->ppi_lu_provider + ppi->ppi_port_provider) != 1) {
2445 return (EINVAL);
2446 }
2447
2448 mutex_enter(&stmf_state.stmf_lock);
2449 for (ppd = stmf_state.stmf_ppdlist; ppd != NULL; ppd = ppd->ppd_next) {
2450 if (ppi->ppi_lu_provider) {
2451 if (!ppd->ppd_lu_provider)
2452 continue;
2453 } else if (ppi->ppi_port_provider) {
2454 if (!ppd->ppd_port_provider)
2455 continue;
2456 }
2457 if (strncmp(ppi->ppi_name, ppd->ppd_name, 254) == 0)
2458 break;
2459 }
2460
2461 if (ppd == NULL) {
2462 /* New provider */
2463 s = strlen(ppi->ppi_name);
2464 if (s > 254) {
2465 mutex_exit(&stmf_state.stmf_lock);
2466 return (EINVAL);
2467 }
2468 s += sizeof (stmf_pp_data_t) - 7;
2469
2470 ppd = kmem_zalloc(s, KM_NOSLEEP);
2471 if (ppd == NULL) {
2472 mutex_exit(&stmf_state.stmf_lock);
2473 return (ENOMEM);
2474 }
2475 ppd->ppd_alloc_size = s;
2476 (void) strcpy(ppd->ppd_name, ppi->ppi_name);
2477
2478 /* See if this provider already exists */
2479 if (ppi->ppi_lu_provider) {
2480 ppd->ppd_lu_provider = 1;
2481 for (ilp = stmf_state.stmf_ilplist; ilp != NULL;
2482 ilp = ilp->ilp_next) {
2483 if (strcmp(ppi->ppi_name,
2484 ilp->ilp_lp->lp_name) == 0) {
2485 ppd->ppd_provider = ilp;
2486 ilp->ilp_ppd = ppd;
2487 break;
2488 }
2489 }
2490 } else {
2491 ppd->ppd_port_provider = 1;
2492 for (ipp = stmf_state.stmf_ipplist; ipp != NULL;
2493 ipp = ipp->ipp_next) {
2494 if (strcmp(ppi->ppi_name,
2495 ipp->ipp_pp->pp_name) == 0) {
2496 ppd->ppd_provider = ipp;
2497 ipp->ipp_ppd = ppd;
2498 break;
2499 }
2500 }
2501 }
2502
2503 /* Link this ppd in */
2504 ppd->ppd_next = stmf_state.stmf_ppdlist;
2505 stmf_state.stmf_ppdlist = ppd;
2506 }
2507
2508 /*
2509 * User is requesting that the token be checked.
2510 * If there was another set after the user's get
2511 * it's an error
2512 */
2513 if (ppi->ppi_token_valid) {
2514 if (ppi->ppi_token != ppd->ppd_token) {
2515 *err_ret = STMF_IOCERR_PPD_UPDATED;
2516 mutex_exit(&stmf_state.stmf_lock);
2517 return (EINVAL);
2518 }
2519 }
2520
2521 if ((ret = nvlist_unpack((char *)ppi->ppi_data,
2522 (size_t)ppi->ppi_data_size, &nv, KM_NOSLEEP)) != 0) {
2523 mutex_exit(&stmf_state.stmf_lock);
2524 return (ret);
2525 }
2526
2527 /* Free any existing lists and add this one to the ppd */
2528 nvlist_free(ppd->ppd_nv);
2529 ppd->ppd_nv = nv;
2530
2531 /* set the token for writes */
2532 ppd->ppd_token++;
2533 /* return token to caller */
2534 if (ppi_token) {
2535 *ppi_token = ppd->ppd_token;
2536 }
2537
2538 /* If there is a provider registered, do the notifications */
2539 if (ppd->ppd_provider) {
2540 uint32_t cb_flags = 0;
2541
2542 if (stmf_state.stmf_config_state == STMF_CONFIG_INIT)
2543 cb_flags |= STMF_PCB_STMF_ONLINING;
2544 if (ppi->ppi_lu_provider) {
2545 ilp = (stmf_i_lu_provider_t *)ppd->ppd_provider;
2546 if (ilp->ilp_lp->lp_cb == NULL)
2547 goto bail_out;
2548 ilp->ilp_cb_in_progress = 1;
2549 mutex_exit(&stmf_state.stmf_lock);
2550 ilp->ilp_lp->lp_cb(ilp->ilp_lp,
2551 STMF_PROVIDER_DATA_UPDATED, ppd->ppd_nv, cb_flags);
2552 mutex_enter(&stmf_state.stmf_lock);
2553 ilp->ilp_cb_in_progress = 0;
2554 } else {
2555 ipp = (stmf_i_port_provider_t *)ppd->ppd_provider;
2556 if (ipp->ipp_pp->pp_cb == NULL)
2557 goto bail_out;
2558 ipp->ipp_cb_in_progress = 1;
2559 mutex_exit(&stmf_state.stmf_lock);
2560 ipp->ipp_pp->pp_cb(ipp->ipp_pp,
2561 STMF_PROVIDER_DATA_UPDATED, ppd->ppd_nv, cb_flags);
2562 mutex_enter(&stmf_state.stmf_lock);
2563 ipp->ipp_cb_in_progress = 0;
2564 }
2565 }
2566
2567 bail_out:
2568 mutex_exit(&stmf_state.stmf_lock);
2569
2570 return (0);
2571 }
2572
2573 void
2574 stmf_delete_ppd(stmf_pp_data_t *ppd)
2575 {
2576 stmf_pp_data_t **pppd;
2577
2578 ASSERT(mutex_owned(&stmf_state.stmf_lock));
2579 if (ppd->ppd_provider) {
2580 if (ppd->ppd_lu_provider) {
2581 ((stmf_i_lu_provider_t *)
2582 ppd->ppd_provider)->ilp_ppd = NULL;
2583 } else {
2584 ((stmf_i_port_provider_t *)
2585 ppd->ppd_provider)->ipp_ppd = NULL;
2586 }
2587 ppd->ppd_provider = NULL;
2588 }
2589
2590 for (pppd = &stmf_state.stmf_ppdlist; *pppd != NULL;
2591 pppd = &((*pppd)->ppd_next)) {
2592 if (*pppd == ppd)
2593 break;
2594 }
2595
2596 if (*pppd == NULL)
2597 return;
2598
2599 *pppd = ppd->ppd_next;
2600 nvlist_free(ppd->ppd_nv);
2601
2602 kmem_free(ppd, ppd->ppd_alloc_size);
2603 }
2604
2605 int
2606 stmf_delete_ppd_ioctl(stmf_ppioctl_data_t *ppi)
2607 {
2608 stmf_pp_data_t *ppd;
2609 int ret = ENOENT;
2610
2611 if ((ppi->ppi_lu_provider + ppi->ppi_port_provider) != 1) {
2612 return (EINVAL);
2613 }
2614
2615 mutex_enter(&stmf_state.stmf_lock);
2616
2617 for (ppd = stmf_state.stmf_ppdlist; ppd != NULL; ppd = ppd->ppd_next) {
2618 if (ppi->ppi_lu_provider) {
2619 if (!ppd->ppd_lu_provider)
2620 continue;
2621 } else if (ppi->ppi_port_provider) {
2622 if (!ppd->ppd_port_provider)
2623 continue;
2624 }
2625 if (strncmp(ppi->ppi_name, ppd->ppd_name, 254) == 0)
2626 break;
2627 }
2628
2629 if (ppd) {
2630 ret = 0;
2631 stmf_delete_ppd(ppd);
2632 }
2633 mutex_exit(&stmf_state.stmf_lock);
2634
2635 return (ret);
2636 }
2637
2638 int
2639 stmf_get_ppd_ioctl(stmf_ppioctl_data_t *ppi, stmf_ppioctl_data_t *ppi_out,
2640 uint32_t *err_ret)
2641 {
2642 stmf_pp_data_t *ppd;
2643 size_t req_size;
2644 int ret = ENOENT;
2645 char *bufp = (char *)ppi_out->ppi_data;
2646
2647 if ((ppi->ppi_lu_provider + ppi->ppi_port_provider) != 1) {
2648 return (EINVAL);
2649 }
2650
2651 mutex_enter(&stmf_state.stmf_lock);
2652
2653 for (ppd = stmf_state.stmf_ppdlist; ppd != NULL; ppd = ppd->ppd_next) {
2654 if (ppi->ppi_lu_provider) {
2655 if (!ppd->ppd_lu_provider)
2656 continue;
2657 } else if (ppi->ppi_port_provider) {
2658 if (!ppd->ppd_port_provider)
2659 continue;
2660 }
2661 if (strncmp(ppi->ppi_name, ppd->ppd_name, 254) == 0)
2662 break;
2663 }
2664
2665 if (ppd && ppd->ppd_nv) {
2666 ppi_out->ppi_token = ppd->ppd_token;
2667 if ((ret = nvlist_size(ppd->ppd_nv, &req_size,
2668 NV_ENCODE_XDR)) != 0) {
2669 goto done;
2670 }
2671 ppi_out->ppi_data_size = req_size;
2672 if (req_size > ppi->ppi_data_size) {
2673 *err_ret = STMF_IOCERR_INSUFFICIENT_BUF;
2674 ret = EINVAL;
2675 goto done;
2676 }
2677
2678 if ((ret = nvlist_pack(ppd->ppd_nv, &bufp, &req_size,
2679 NV_ENCODE_XDR, 0)) != 0) {
2680 goto done;
2681 }
2682 ret = 0;
2683 }
2684
2685 done:
2686 mutex_exit(&stmf_state.stmf_lock);
2687
2688 return (ret);
2689 }
2690
2691 void
2692 stmf_delete_all_ppds()
2693 {
2694 stmf_pp_data_t *ppd, *nppd;
2695
2696 ASSERT(mutex_owned(&stmf_state.stmf_lock));
2697 for (ppd = stmf_state.stmf_ppdlist; ppd != NULL; ppd = nppd) {
2698 nppd = ppd->ppd_next;
2699 stmf_delete_ppd(ppd);
2700 }
2701 }
2702
2703 /*
2704 * 16 is the max string length of a protocol_ident, increase
2705 * the size if needed.
2706 */
2707 #define STMF_KSTAT_LU_SZ (STMF_GUID_INPUT + 1 + 256)
2708 #define STMF_KSTAT_TGT_SZ (256 * 2 + 16)
2709
2710 /*
2711 * This array matches the Protocol Identifier in stmf_ioctl.h
2712 */
2713 #define MAX_PROTO_STR_LEN 32
2714
2715 char *protocol_ident[PROTOCOL_ANY] = {
2716 "Fibre Channel",
2717 "Parallel SCSI",
2718 "SSA",
2719 "IEEE_1394",
2720 "SRP",
2721 "iSCSI",
2722 "SAS",
2723 "ADT",
2724 "ATAPI",
2725 "UNKNOWN", "UNKNOWN", "UNKNOWN", "UNKNOWN", "UNKNOWN", "UNKNOWN"
2726 };
2727
2728 /*
2729 * Update the lun wait/run queue count
2730 */
2731 static void
2732 stmf_update_kstat_lu_q(scsi_task_t *task, void func())
2733 {
2734 stmf_i_lu_t *ilu;
2735 kstat_io_t *kip;
2736
2737 if (task->task_lu == dlun0)
2738 return;
2739 ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
2740 if (ilu != NULL && ilu->ilu_kstat_io != NULL) {
2741 kip = KSTAT_IO_PTR(ilu->ilu_kstat_io);
2742 if (kip != NULL) {
2743 func(kip);
2744 }
2745 }
2746 }
2747
2748 /*
2749 * Update the target(lport) wait/run queue count
2750 */
2751 static void
2752 stmf_update_kstat_lport_q(scsi_task_t *task, void func())
2753 {
2754 stmf_i_local_port_t *ilp;
2755 kstat_io_t *kip;
2756
2757 ilp = (stmf_i_local_port_t *)task->task_lport->lport_stmf_private;
2758 if (ilp != NULL && ilp->ilport_kstat_io != NULL) {
2759 kip = KSTAT_IO_PTR(ilp->ilport_kstat_io);
2760 if (kip != NULL) {
2761 mutex_enter(ilp->ilport_kstat_io->ks_lock);
2762 func(kip);
2763 mutex_exit(ilp->ilport_kstat_io->ks_lock);
2764 }
2765 }
2766 }
2767
2768 static void
2769 stmf_update_kstat_lport_io(scsi_task_t *task, stmf_data_buf_t *dbuf)
2770 {
2771 stmf_i_local_port_t *ilp;
2772 kstat_io_t *kip;
2773
2774 ilp = (stmf_i_local_port_t *)task->task_lport->lport_stmf_private;
2775 if (ilp != NULL && ilp->ilport_kstat_io != NULL) {
2776 kip = KSTAT_IO_PTR(ilp->ilport_kstat_io);
2777 if (kip != NULL) {
2778 mutex_enter(ilp->ilport_kstat_io->ks_lock);
2779 STMF_UPDATE_KSTAT_IO(kip, dbuf);
2780 mutex_exit(ilp->ilport_kstat_io->ks_lock);
2781 }
2782 }
2783 }
2784
2785 static void
2786 stmf_update_kstat_lu_io(scsi_task_t *task, stmf_data_buf_t *dbuf)
2787 {
2788 stmf_i_lu_t *ilu;
2789 kstat_io_t *kip;
2790
2791 ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
2792 if (ilu != NULL && ilu->ilu_kstat_io != NULL) {
2793 kip = KSTAT_IO_PTR(ilu->ilu_kstat_io);
2794 if (kip != NULL) {
2795 mutex_enter(ilu->ilu_kstat_io->ks_lock);
2796 STMF_UPDATE_KSTAT_IO(kip, dbuf);
2797 mutex_exit(ilu->ilu_kstat_io->ks_lock);
2798 }
2799 }
2800 }
2801
2802 static void
2803 stmf_create_kstat_lu(stmf_i_lu_t *ilu)
2804 {
2805 char ks_nm[KSTAT_STRLEN];
2806 stmf_kstat_lu_info_t *ks_lu;
2807
2808 /* create kstat lun info */
2809 ks_lu = (stmf_kstat_lu_info_t *)kmem_zalloc(STMF_KSTAT_LU_SZ,
2810 KM_NOSLEEP);
2811 if (ks_lu == NULL) {
2812 cmn_err(CE_WARN, "STMF: kmem_zalloc failed");
2813 return;
2814 }
2815
2816 bzero(ks_nm, sizeof (ks_nm));
2817 (void) sprintf(ks_nm, "stmf_lu_%"PRIxPTR"", (uintptr_t)ilu);
2818 if ((ilu->ilu_kstat_info = kstat_create(STMF_MODULE_NAME, 0,
2819 ks_nm, "misc", KSTAT_TYPE_NAMED,
2820 sizeof (stmf_kstat_lu_info_t) / sizeof (kstat_named_t),
2821 KSTAT_FLAG_VIRTUAL)) == NULL) {
2822 kmem_free(ks_lu, STMF_KSTAT_LU_SZ);
2823 cmn_err(CE_WARN, "STMF: kstat_create lu failed");
2824 return;
2825 }
2826
2827 ilu->ilu_kstat_info->ks_data_size = STMF_KSTAT_LU_SZ;
2828 ilu->ilu_kstat_info->ks_data = ks_lu;
2829
2830 kstat_named_init(&ks_lu->i_lun_guid, "lun-guid",
2831 KSTAT_DATA_STRING);
2832 kstat_named_init(&ks_lu->i_lun_alias, "lun-alias",
2833 KSTAT_DATA_STRING);
2834
2835 /* convert guid to hex string */
2836 int i;
2837 uint8_t *p = ilu->ilu_lu->lu_id->ident;
2838 bzero(ilu->ilu_ascii_hex_guid, sizeof (ilu->ilu_ascii_hex_guid));
2839 for (i = 0; i < STMF_GUID_INPUT / 2; i++) {
2840 (void) sprintf(&ilu->ilu_ascii_hex_guid[i * 2], "%02x", p[i]);
2841 }
2842 kstat_named_setstr(&ks_lu->i_lun_guid,
2843 (const char *)ilu->ilu_ascii_hex_guid);
2844 kstat_named_setstr(&ks_lu->i_lun_alias,
2845 (const char *)ilu->ilu_lu->lu_alias);
2846 kstat_install(ilu->ilu_kstat_info);
2847
2848 /* create kstat lun io */
2849 bzero(ks_nm, sizeof (ks_nm));
2850 (void) sprintf(ks_nm, "stmf_lu_io_%"PRIxPTR"", (uintptr_t)ilu);
2851 if ((ilu->ilu_kstat_io = kstat_create(STMF_MODULE_NAME, 0,
2852 ks_nm, "io", KSTAT_TYPE_IO, 1, 0)) == NULL) {
2853 cmn_err(CE_WARN, "STMF: kstat_create lu_io failed");
2854 return;
2855 }
2856 mutex_init(&ilu->ilu_kstat_lock, NULL, MUTEX_DRIVER, 0);
2857 ilu->ilu_kstat_io->ks_lock = &ilu->ilu_kstat_lock;
2858 kstat_install(ilu->ilu_kstat_io);
2859 }
2860
2861 static void
2862 stmf_create_kstat_lport(stmf_i_local_port_t *ilport)
2863 {
2864 char ks_nm[KSTAT_STRLEN];
2865 stmf_kstat_tgt_info_t *ks_tgt;
2866 int id, len;
2867
2868 /* create kstat lport info */
2869 ks_tgt = (stmf_kstat_tgt_info_t *)kmem_zalloc(STMF_KSTAT_TGT_SZ,
2870 KM_NOSLEEP);
2871 if (ks_tgt == NULL) {
2872 cmn_err(CE_WARN, "STMF: kmem_zalloc failed");
2873 return;
2874 }
2875
2876 bzero(ks_nm, sizeof (ks_nm));
2877 (void) sprintf(ks_nm, "stmf_tgt_%"PRIxPTR"", (uintptr_t)ilport);
2878 if ((ilport->ilport_kstat_info = kstat_create(STMF_MODULE_NAME,
2879 0, ks_nm, "misc", KSTAT_TYPE_NAMED,
2880 sizeof (stmf_kstat_tgt_info_t) / sizeof (kstat_named_t),
2881 KSTAT_FLAG_VIRTUAL)) == NULL) {
2882 kmem_free(ks_tgt, STMF_KSTAT_TGT_SZ);
2883 cmn_err(CE_WARN, "STMF: kstat_create target failed");
2884 return;
2885 }
2886
2887 ilport->ilport_kstat_info->ks_data_size = STMF_KSTAT_TGT_SZ;
2888 ilport->ilport_kstat_info->ks_data = ks_tgt;
2889
2890 kstat_named_init(&ks_tgt->i_tgt_name, "target-name",
2891 KSTAT_DATA_STRING);
2892 kstat_named_init(&ks_tgt->i_tgt_alias, "target-alias",
2893 KSTAT_DATA_STRING);
2894 kstat_named_init(&ks_tgt->i_protocol, "protocol",
2895 KSTAT_DATA_STRING);
2896
2897 /* ident might not be null terminated */
2898 len = ilport->ilport_lport->lport_id->ident_length;
2899 bcopy(ilport->ilport_lport->lport_id->ident,
2900 ilport->ilport_kstat_tgt_name, len);
2901 ilport->ilport_kstat_tgt_name[len + 1] = NULL;
2902 kstat_named_setstr(&ks_tgt->i_tgt_name,
2903 (const char *)ilport->ilport_kstat_tgt_name);
2904 kstat_named_setstr(&ks_tgt->i_tgt_alias,
2905 (const char *)ilport->ilport_lport->lport_alias);
2906 /* protocol */
2907 if ((id = ilport->ilport_lport->lport_id->protocol_id) > PROTOCOL_ANY) {
2908 cmn_err(CE_WARN, "STMF: protocol_id out of bound");
2909 id = PROTOCOL_ANY;
2910 }
2911 kstat_named_setstr(&ks_tgt->i_protocol, protocol_ident[id]);
2912 kstat_install(ilport->ilport_kstat_info);
2913
2914 /* create kstat lport io */
2915 bzero(ks_nm, sizeof (ks_nm));
2916 (void) sprintf(ks_nm, "stmf_tgt_io_%"PRIxPTR"", (uintptr_t)ilport);
2917 if ((ilport->ilport_kstat_io = kstat_create(STMF_MODULE_NAME, 0,
2918 ks_nm, "io", KSTAT_TYPE_IO, 1, 0)) == NULL) {
2919 cmn_err(CE_WARN, "STMF: kstat_create target_io failed");
2920 return;
2921 }
2922 mutex_init(&ilport->ilport_kstat_lock, NULL, MUTEX_DRIVER, 0);
2923 ilport->ilport_kstat_io->ks_lock = &ilport->ilport_kstat_lock;
2924 kstat_install(ilport->ilport_kstat_io);
2925 }
2926
2927 /*
2928 * set the asymmetric access state for a logical unit
2929 * caller is responsible for establishing SCSI unit attention on
2930 * state change
2931 */
2932 stmf_status_t
2933 stmf_set_lu_access(stmf_lu_t *lu, uint8_t access_state)
2934 {
2935 stmf_i_lu_t *ilu;
2936 uint8_t *p1, *p2;
2937
2938 if ((access_state != STMF_LU_STANDBY) &&
2939 (access_state != STMF_LU_ACTIVE)) {
2940 return (STMF_INVALID_ARG);
2941 }
2942
2943 p1 = &lu->lu_id->ident[0];
2944 mutex_enter(&stmf_state.stmf_lock);
2945 if (stmf_state.stmf_inventory_locked) {
2946 mutex_exit(&stmf_state.stmf_lock);
2947 return (STMF_BUSY);
2948 }
2949
2950 for (ilu = stmf_state.stmf_ilulist; ilu != NULL; ilu = ilu->ilu_next) {
2951 p2 = &ilu->ilu_lu->lu_id->ident[0];
2952 if (bcmp(p1, p2, 16) == 0) {
2953 break;
2954 }
2955 }
2956
2957 if (!ilu) {
2958 ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
2959 } else {
2960 /*
2961 * We're changing access state on an existing logical unit
2962 * Send the proxy registration message for this logical unit
2963 * if we're in alua mode.
2964 * If the requested state is STMF_LU_ACTIVE, we want to register
2965 * this logical unit.
2966 * If the requested state is STMF_LU_STANDBY, we're going to
2967 * abort all tasks for this logical unit.
2968 */
2969 if (stmf_state.stmf_alua_state == 1 &&
2970 access_state == STMF_LU_ACTIVE) {
2971 stmf_ic_msg_status_t ic_ret = STMF_IC_MSG_SUCCESS;
2972 stmf_ic_msg_t *ic_reg_lun;
2973 if (lu->lu_lp && lu->lu_lp->lp_lpif_rev == LPIF_REV_2 &&
2974 lu->lu_lp->lp_alua_support) {
2975 ilu->ilu_alua = 1;
2976 /* allocate the register message */
2977 ic_reg_lun = ic_lun_active_msg_alloc(p1,
2978 lu->lu_lp->lp_name,
2979 lu->lu_proxy_reg_arg_len,
2980 (uint8_t *)lu->lu_proxy_reg_arg,
2981 stmf_proxy_msg_id);
2982 /* send the message */
2983 if (ic_reg_lun) {
2984 ic_ret = ic_tx_msg(ic_reg_lun);
2985 if (ic_ret == STMF_IC_MSG_SUCCESS) {
2986 stmf_proxy_msg_id++;
2987 }
2988 }
2989 }
2990 } else if (stmf_state.stmf_alua_state == 1 &&
2991 access_state == STMF_LU_STANDBY) {
2992 /* abort all tasks for this lu */
2993 stmf_task_lu_killall(lu, NULL, STMF_ABORTED);
2994 }
2995 }
2996
2997 ilu->ilu_access = access_state;
2998
2999 mutex_exit(&stmf_state.stmf_lock);
3000 return (STMF_SUCCESS);
3001 }
3002
3003
3004 stmf_status_t
3005 stmf_register_lu(stmf_lu_t *lu)
3006 {
3007 stmf_i_lu_t *ilu;
3008 uint8_t *p1, *p2;
3009 stmf_state_change_info_t ssci;
3010 stmf_id_data_t *luid;
3011
3012 if ((lu->lu_id->ident_type != ID_TYPE_NAA) ||
3013 (lu->lu_id->ident_length != 16) ||
3014 ((lu->lu_id->ident[0] & 0xf0) != 0x60)) {
3015 return (STMF_INVALID_ARG);
3016 }
3017 p1 = &lu->lu_id->ident[0];
3018 mutex_enter(&stmf_state.stmf_lock);
3019 if (stmf_state.stmf_inventory_locked) {
3020 mutex_exit(&stmf_state.stmf_lock);
3021 return (STMF_BUSY);
3022 }
3023
3024 for (ilu = stmf_state.stmf_ilulist; ilu != NULL; ilu = ilu->ilu_next) {
3025 p2 = &ilu->ilu_lu->lu_id->ident[0];
3026 if (bcmp(p1, p2, 16) == 0) {
3027 mutex_exit(&stmf_state.stmf_lock);
3028 return (STMF_ALREADY);
3029 }
3030 }
3031
3032 ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
3033 luid = stmf_lookup_id(&stmf_state.stmf_luid_list,
3034 lu->lu_id->ident_length, lu->lu_id->ident);
3035 if (luid) {
3036 luid->id_pt_to_object = (void *)ilu;
3037 ilu->ilu_luid = luid;
3038 }
3039 ilu->ilu_alias = NULL;
3040
3041 ilu->ilu_next = stmf_state.stmf_ilulist;
3042 ilu->ilu_prev = NULL;
3043 if (ilu->ilu_next)
3044 ilu->ilu_next->ilu_prev = ilu;
3045 stmf_state.stmf_ilulist = ilu;
3046 stmf_state.stmf_nlus++;
3047 if (lu->lu_lp) {
3048 ((stmf_i_lu_provider_t *)
3049 (lu->lu_lp->lp_stmf_private))->ilp_nlus++;
3050 }
3051 ilu->ilu_cur_task_cntr = &ilu->ilu_task_cntr1;
3052 STMF_EVENT_ALLOC_HANDLE(ilu->ilu_event_hdl);
3053 cv_init(&ilu->ilu_offline_pending_cv, NULL, CV_DRIVER, NULL);
3054 stmf_create_kstat_lu(ilu);
3055 /*
3056 * register with proxy module if available and logical unit
3057 * is in active state
3058 */
3059 if (stmf_state.stmf_alua_state == 1 &&
3060 ilu->ilu_access == STMF_LU_ACTIVE) {
3061 stmf_ic_msg_status_t ic_ret = STMF_IC_MSG_SUCCESS;
3062 stmf_ic_msg_t *ic_reg_lun;
3063 if (lu->lu_lp && lu->lu_lp->lp_lpif_rev == LPIF_REV_2 &&
3064 lu->lu_lp->lp_alua_support) {
3065 ilu->ilu_alua = 1;
3066 /* allocate the register message */
3067 ic_reg_lun = ic_reg_lun_msg_alloc(p1,
3068 lu->lu_lp->lp_name, lu->lu_proxy_reg_arg_len,
3069 (uint8_t *)lu->lu_proxy_reg_arg, stmf_proxy_msg_id);
3070 /* send the message */
3071 if (ic_reg_lun) {
3072 ic_ret = ic_tx_msg(ic_reg_lun);
3073 if (ic_ret == STMF_IC_MSG_SUCCESS) {
3074 stmf_proxy_msg_id++;
3075 }
3076 }
3077 }
3078 }
3079 mutex_exit(&stmf_state.stmf_lock);
3080
3081 /* check the default state for lu */
3082 if (stmf_state.stmf_default_lu_state == STMF_STATE_OFFLINE) {
3083 ilu->ilu_prev_state = STMF_STATE_OFFLINE;
3084 } else {
3085 ilu->ilu_prev_state = STMF_STATE_ONLINE;
3086 if (stmf_state.stmf_service_running) {
3087 ssci.st_rflags = 0;
3088 ssci.st_additional_info = NULL;
3089 (void) stmf_ctl(STMF_CMD_LU_ONLINE, lu, &ssci);
3090 }
3091 }
3092
3093 /* XXX: Generate event */
3094 return (STMF_SUCCESS);
3095 }
3096
3097 stmf_status_t
3098 stmf_deregister_lu(stmf_lu_t *lu)
3099 {
3100 stmf_i_lu_t *ilu;
3101
3102 mutex_enter(&stmf_state.stmf_lock);
3103 if (stmf_state.stmf_inventory_locked) {
3104 mutex_exit(&stmf_state.stmf_lock);
3105 return (STMF_BUSY);
3106 }
3107 ilu = stmf_lookup_lu(lu);
3108 if (ilu == NULL) {
3109 mutex_exit(&stmf_state.stmf_lock);
3110 return (STMF_INVALID_ARG);
3111 }
3112 if (ilu->ilu_state == STMF_STATE_OFFLINE) {
3113 ASSERT(ilu->ilu_ntasks == ilu->ilu_ntasks_free);
3114 while (ilu->ilu_flags & ILU_STALL_DEREGISTER) {
3115 cv_wait(&stmf_state.stmf_cv, &stmf_state.stmf_lock);
3116 }
3117 if (ilu->ilu_ntasks) {
3118 stmf_i_scsi_task_t *itask, *nitask;
3119
3120 nitask = ilu->ilu_tasks;
3121 do {
3122 itask = nitask;
3123 nitask = itask->itask_lu_next;
3124 lu->lu_task_free(itask->itask_task);
3125 stmf_free(itask->itask_task);
3126 } while (nitask != NULL);
3127
3128 ilu->ilu_tasks = ilu->ilu_free_tasks = NULL;
3129 ilu->ilu_ntasks = ilu->ilu_ntasks_free = 0;
3130 }
3131 /* de-register with proxy if available */
3132 if (ilu->ilu_access == STMF_LU_ACTIVE &&
3133 stmf_state.stmf_alua_state == 1) {
3134 /* de-register with proxy module */
3135 stmf_ic_msg_status_t ic_ret = STMF_IC_MSG_SUCCESS;
3136 stmf_ic_msg_t *ic_dereg_lun;
3137 if (lu->lu_lp && lu->lu_lp->lp_lpif_rev == LPIF_REV_2 &&
3138 lu->lu_lp->lp_alua_support) {
3139 ilu->ilu_alua = 1;
3140 /* allocate the de-register message */
3141 ic_dereg_lun = ic_dereg_lun_msg_alloc(
3142 lu->lu_id->ident, lu->lu_lp->lp_name, 0,
3143 NULL, stmf_proxy_msg_id);
3144 /* send the message */
3145 if (ic_dereg_lun) {
3146 ic_ret = ic_tx_msg(ic_dereg_lun);
3147 if (ic_ret == STMF_IC_MSG_SUCCESS) {
3148 stmf_proxy_msg_id++;
3149 }
3150 }
3151 }
3152 }
3153
3154 if (ilu->ilu_next)
3155 ilu->ilu_next->ilu_prev = ilu->ilu_prev;
3156 if (ilu->ilu_prev)
3157 ilu->ilu_prev->ilu_next = ilu->ilu_next;
3158 else
3159 stmf_state.stmf_ilulist = ilu->ilu_next;
3160 stmf_state.stmf_nlus--;
3161
3162 if (ilu == stmf_state.stmf_svc_ilu_draining) {
3163 stmf_state.stmf_svc_ilu_draining = ilu->ilu_next;
3164 }
3165 if (ilu == stmf_state.stmf_svc_ilu_timing) {
3166 stmf_state.stmf_svc_ilu_timing = ilu->ilu_next;
3167 }
3168 if (lu->lu_lp) {
3169 ((stmf_i_lu_provider_t *)
3170 (lu->lu_lp->lp_stmf_private))->ilp_nlus--;
3171 }
3172 if (ilu->ilu_luid) {
3173 ((stmf_id_data_t *)ilu->ilu_luid)->id_pt_to_object =
3174 NULL;
3175 ilu->ilu_luid = NULL;
3176 }
3177 STMF_EVENT_FREE_HANDLE(ilu->ilu_event_hdl);
3178 } else {
3179 mutex_exit(&stmf_state.stmf_lock);
3180 return (STMF_BUSY);
3181 }
3182 if (ilu->ilu_kstat_info) {
3183 kmem_free(ilu->ilu_kstat_info->ks_data, STMF_KSTAT_LU_SZ);
3184 kstat_delete(ilu->ilu_kstat_info);
3185 }
3186 if (ilu->ilu_kstat_io) {
3187 kstat_delete(ilu->ilu_kstat_io);
3188 mutex_destroy(&ilu->ilu_kstat_lock);
3189 }
3190 cv_destroy(&ilu->ilu_offline_pending_cv);
3191 mutex_exit(&stmf_state.stmf_lock);
3192 return (STMF_SUCCESS);
3193 }
3194
3195 void
3196 stmf_set_port_standby(stmf_local_port_t *lport, uint16_t rtpid)
3197 {
3198 stmf_i_local_port_t *ilport =
3199 (stmf_i_local_port_t *)lport->lport_stmf_private;
3200 ilport->ilport_rtpid = rtpid;
3201 ilport->ilport_standby = 1;
3202 }
3203
3204 void
3205 stmf_set_port_alua(stmf_local_port_t *lport)
3206 {
3207 stmf_i_local_port_t *ilport =
3208 (stmf_i_local_port_t *)lport->lport_stmf_private;
3209 ilport->ilport_alua = 1;
3210 }
3211
3212 stmf_status_t
3213 stmf_register_local_port(stmf_local_port_t *lport)
3214 {
3215 stmf_i_local_port_t *ilport;
3216 stmf_state_change_info_t ssci;
3217 int start_workers = 0;
3218
3219 mutex_enter(&stmf_state.stmf_lock);
3220 if (stmf_state.stmf_inventory_locked) {
3221 mutex_exit(&stmf_state.stmf_lock);
3222 return (STMF_BUSY);
3223 }
3224 ilport = (stmf_i_local_port_t *)lport->lport_stmf_private;
3225 rw_init(&ilport->ilport_lock, NULL, RW_DRIVER, NULL);
3226
3227 ilport->ilport_instance =
3228 id_alloc_nosleep(stmf_state.stmf_ilport_inst_space);
3229 if (ilport->ilport_instance == -1) {
3230 mutex_exit(&stmf_state.stmf_lock);
3231 return (STMF_FAILURE);
3232 }
3233 ilport->ilport_next = stmf_state.stmf_ilportlist;
3234 ilport->ilport_prev = NULL;
3235 if (ilport->ilport_next)
3236 ilport->ilport_next->ilport_prev = ilport;
3237 stmf_state.stmf_ilportlist = ilport;
3238 stmf_state.stmf_nlports++;
3239 if (lport->lport_pp) {
3240 ((stmf_i_port_provider_t *)
3241 (lport->lport_pp->pp_stmf_private))->ipp_npps++;
3242 }
3243 ilport->ilport_tg =
3244 stmf_lookup_group_for_target(lport->lport_id->ident,
3245 lport->lport_id->ident_length);
3246
3247 /*
3248 * rtpid will/must be set if this is a standby port
3249 * only register ports that are not standby (proxy) ports
3250 * and ports that are alua participants (ilport_alua == 1)
3251 */
3252 if (ilport->ilport_standby == 0) {
3253 ilport->ilport_rtpid = atomic_inc_16_nv(&stmf_rtpid_counter);
3254 }
3255
3256 if (stmf_state.stmf_alua_state == 1 &&
3257 ilport->ilport_standby == 0 &&
3258 ilport->ilport_alua == 1) {
3259 stmf_ic_msg_t *ic_reg_port;
3260 stmf_ic_msg_status_t ic_ret;
3261 stmf_local_port_t *lport;
3262 lport = ilport->ilport_lport;
3263 ic_reg_port = ic_reg_port_msg_alloc(
3264 lport->lport_id, ilport->ilport_rtpid,
3265 0, NULL, stmf_proxy_msg_id);
3266 if (ic_reg_port) {
3267 ic_ret = ic_tx_msg(ic_reg_port);
3268 if (ic_ret == STMF_IC_MSG_SUCCESS) {
3269 ilport->ilport_reg_msgid = stmf_proxy_msg_id++;
3270 } else {
3271 cmn_err(CE_WARN, "error on port registration "
3272 "port - %s", ilport->ilport_kstat_tgt_name);
3273 }
3274 }
3275 }
3276 STMF_EVENT_ALLOC_HANDLE(ilport->ilport_event_hdl);
3277 stmf_create_kstat_lport(ilport);
3278 if (stmf_workers_state == STMF_WORKERS_DISABLED) {
3279 stmf_workers_state = STMF_WORKERS_ENABLING;
3280 start_workers = 1;
3281 }
3282 mutex_exit(&stmf_state.stmf_lock);
3283
3284 if (start_workers)
3285 stmf_worker_init();
3286
3287 /* the default state of LPORT */
3288
3289 if (stmf_state.stmf_default_lport_state == STMF_STATE_OFFLINE) {
3290 ilport->ilport_prev_state = STMF_STATE_OFFLINE;
3291 } else {
3292 ilport->ilport_prev_state = STMF_STATE_ONLINE;
3293 if (stmf_state.stmf_service_running) {
3294 ssci.st_rflags = 0;
3295 ssci.st_additional_info = NULL;
3296 (void) stmf_ctl(STMF_CMD_LPORT_ONLINE, lport, &ssci);
3297 }
3298 }
3299
3300 /* XXX: Generate event */
3301 return (STMF_SUCCESS);
3302 }
3303
3304 stmf_status_t
3305 stmf_deregister_local_port(stmf_local_port_t *lport)
3306 {
3307 stmf_i_local_port_t *ilport;
3308
3309 mutex_enter(&stmf_state.stmf_lock);
3310 if (stmf_state.stmf_inventory_locked) {
3311 mutex_exit(&stmf_state.stmf_lock);
3312 return (STMF_BUSY);
3313 }
3314
3315 /* dequeue all object requests from active queue */
3316 stmf_svc_kill_obj_requests(lport);
3317
3318 ilport = (stmf_i_local_port_t *)lport->lport_stmf_private;
3319
3320 /*
3321 * deregister ports that are not standby (proxy)
3322 */
3323 if (stmf_state.stmf_alua_state == 1 &&
3324 ilport->ilport_standby == 0 &&
3325 ilport->ilport_alua == 1) {
3326 stmf_ic_msg_t *ic_dereg_port;
3327 stmf_ic_msg_status_t ic_ret;
3328 ic_dereg_port = ic_dereg_port_msg_alloc(
3329 lport->lport_id, 0, NULL, stmf_proxy_msg_id);
3330 if (ic_dereg_port) {
3331 ic_ret = ic_tx_msg(ic_dereg_port);
3332 if (ic_ret == STMF_IC_MSG_SUCCESS) {
3333 stmf_proxy_msg_id++;
3334 }
3335 }
3336 }
3337
3338 if (ilport->ilport_nsessions == 0) {
3339 if (ilport->ilport_next)
3340 ilport->ilport_next->ilport_prev = ilport->ilport_prev;
3341 if (ilport->ilport_prev)
3342 ilport->ilport_prev->ilport_next = ilport->ilport_next;
3343 else
3344 stmf_state.stmf_ilportlist = ilport->ilport_next;
3345 id_free(stmf_state.stmf_ilport_inst_space,
3346 ilport->ilport_instance);
3347 rw_destroy(&ilport->ilport_lock);
3348 stmf_state.stmf_nlports--;
3349 if (lport->lport_pp) {
3350 ((stmf_i_port_provider_t *)
3351 (lport->lport_pp->pp_stmf_private))->ipp_npps--;
3352 }
3353 ilport->ilport_tg = NULL;
3354 STMF_EVENT_FREE_HANDLE(ilport->ilport_event_hdl);
3355 } else {
3356 mutex_exit(&stmf_state.stmf_lock);
3357 return (STMF_BUSY);
3358 }
3359 if (ilport->ilport_kstat_info) {
3360 kmem_free(ilport->ilport_kstat_info->ks_data,
3361 STMF_KSTAT_TGT_SZ);
3362 kstat_delete(ilport->ilport_kstat_info);
3363 }
3364 if (ilport->ilport_kstat_io) {
3365 kstat_delete(ilport->ilport_kstat_io);
3366 mutex_destroy(&ilport->ilport_kstat_lock);
3367 }
3368 mutex_exit(&stmf_state.stmf_lock);
3369 return (STMF_SUCCESS);
3370 }
3371
3372 /*
3373 * Rport id/instance mappings remain valid until STMF is unloaded
3374 */
3375 static int
3376 stmf_irport_compare(const void *void_irport1, const void *void_irport2)
3377 {
3378 const stmf_i_remote_port_t *irport1 = void_irport1;
3379 const stmf_i_remote_port_t *irport2 = void_irport2;
3380 int result;
3381
3382 /* Sort by code set then ident */
3383 if (irport1->irport_id->code_set <
3384 irport2->irport_id->code_set) {
3385 return (-1);
3386 } else if (irport1->irport_id->code_set >
3387 irport2->irport_id->code_set) {
3388 return (1);
3389 }
3390
3391 /* Next by ident length */
3392 if (irport1->irport_id->ident_length <
3393 irport2->irport_id->ident_length) {
3394 return (-1);
3395 } else if (irport1->irport_id->ident_length >
3396 irport2->irport_id->ident_length) {
3397 return (1);
3398 }
3399
3400 /* Code set and ident length both match, now compare idents */
3401 result = memcmp(irport1->irport_id->ident,
3402 irport2->irport_id->ident,
3403 irport1->irport_id->ident_length);
3404
3405 if (result < 0) {
3406 return (-1);
3407 } else if (result > 0) {
3408 return (1);
3409 }
3410
3411 return (0);
3412 }
3413
3414 static stmf_i_remote_port_t *
3415 stmf_irport_create(scsi_devid_desc_t *rport_devid)
3416 {
3417 int alloc_len;
3418 stmf_i_remote_port_t *irport;
3419
3420 /*
3421 * Lookup will bump the refcnt if there's an existing rport
3422 * context for this identifier.
3423 */
3424 ASSERT(mutex_owned(&stmf_state.stmf_lock));
3425
3426 alloc_len = sizeof (*irport) + sizeof (scsi_devid_desc_t) +
3427 rport_devid->ident_length - 1;
3428 irport = kmem_zalloc(alloc_len, KM_NOSLEEP);
3429 if (irport == NULL) {
3430 return (NULL);
3431 }
3432
3433 irport->irport_instance =
3434 id_alloc_nosleep(stmf_state.stmf_irport_inst_space);
3435 if (irport->irport_instance == -1) {
3436 kmem_free(irport, alloc_len);
3437 return (NULL);
3438 }
3439
3440 irport->irport_id =
3441 (struct scsi_devid_desc *)(irport + 1); /* Ptr. Arith. */
3442 bcopy(rport_devid, irport->irport_id,
3443 sizeof (scsi_devid_desc_t) + rport_devid->ident_length - 1);
3444 irport->irport_refcnt = 1;
3445 mutex_init(&irport->irport_mutex, NULL, MUTEX_DEFAULT, NULL);
3446
3447 return (irport);
3448 }
3449
3450 static void
3451 stmf_irport_destroy(stmf_i_remote_port_t *irport)
3452 {
3453 id_free(stmf_state.stmf_irport_inst_space, irport->irport_instance);
3454 mutex_destroy(&irport->irport_mutex);
3455 kmem_free(irport, sizeof (*irport) + sizeof (scsi_devid_desc_t) +
3456 irport->irport_id->ident_length - 1);
3457 }
3458
3459 static stmf_i_remote_port_t *
3460 stmf_irport_register(scsi_devid_desc_t *rport_devid)
3461 {
3462 stmf_i_remote_port_t *irport;
3463
3464 mutex_enter(&stmf_state.stmf_lock);
3465
3466 /*
3467 * Lookup will bump the refcnt if there's an existing rport
3468 * context for this identifier.
3469 */
3470 if ((irport = stmf_irport_lookup_locked(rport_devid)) != NULL) {
3471 mutex_exit(&stmf_state.stmf_lock);
3472 return (irport);
3473 }
3474
3475 irport = stmf_irport_create(rport_devid);
3476 if (irport == NULL) {
3477 mutex_exit(&stmf_state.stmf_lock);
3478 return (NULL);
3479 }
3480
3481 avl_add(&stmf_state.stmf_irportlist, irport);
3482 mutex_exit(&stmf_state.stmf_lock);
3483
3484 return (irport);
3485 }
3486
3487 static stmf_i_remote_port_t *
3488 stmf_irport_lookup_locked(scsi_devid_desc_t *rport_devid)
3489 {
3490 stmf_i_remote_port_t *irport;
3491 stmf_i_remote_port_t tmp_irport;
3492
3493 ASSERT(mutex_owned(&stmf_state.stmf_lock));
3494 tmp_irport.irport_id = rport_devid;
3495 irport = avl_find(&stmf_state.stmf_irportlist, &tmp_irport, NULL);
3496 if (irport != NULL) {
3497 mutex_enter(&irport->irport_mutex);
3498 irport->irport_refcnt++;
3499 mutex_exit(&irport->irport_mutex);
3500 }
3501
3502 return (irport);
3503 }
3504
3505 static void
3506 stmf_irport_deregister(stmf_i_remote_port_t *irport)
3507 {
3508 /*
3509 * If we were actually going to remove unreferenced remote ports
3510 * we would want to acquire stmf_state.stmf_lock before getting
3511 * the irport mutex.
3512 *
3513 * Instead we're just going to leave it there even if unreferenced.
3514 */
3515 mutex_enter(&irport->irport_mutex);
3516 irport->irport_refcnt--;
3517 mutex_exit(&irport->irport_mutex);
3518 }
3519
3520 /*
3521 * Port provider has to make sure that register/deregister session and
3522 * port are serialized calls.
3523 */
3524 stmf_status_t
3525 stmf_register_scsi_session(stmf_local_port_t *lport, stmf_scsi_session_t *ss)
3526 {
3527 stmf_i_scsi_session_t *iss;
3528 stmf_i_local_port_t *ilport = (stmf_i_local_port_t *)
3529 lport->lport_stmf_private;
3530 uint8_t lun[8];
3531
3532 /*
3533 * Port state has to be online to register a scsi session. It is
3534 * possible that we started an offline operation and a new SCSI
3535 * session started at the same time (in that case also we are going
3536 * to fail the registeration). But any other state is simply
3537 * a bad port provider implementation.
3538 */
3539 if (ilport->ilport_state != STMF_STATE_ONLINE) {
3540 if (ilport->ilport_state != STMF_STATE_OFFLINING) {
3541 stmf_trace(lport->lport_alias, "Port is trying to "
3542 "register a session while the state is neither "
3543 "online nor offlining");
3544 }
3545 return (STMF_FAILURE);
3546 }
3547 bzero(lun, 8);
3548 iss = (stmf_i_scsi_session_t *)ss->ss_stmf_private;
3549 if ((iss->iss_irport = stmf_irport_register(ss->ss_rport_id)) == NULL) {
3550 stmf_trace(lport->lport_alias, "Could not register "
3551 "remote port during session registration");
3552 return (STMF_FAILURE);
3553 }
3554
3555 iss->iss_flags |= ISS_BEING_CREATED;
3556
3557 if (ss->ss_rport == NULL) {
3558 iss->iss_flags |= ISS_NULL_TPTID;
3559 ss->ss_rport = stmf_scsilib_devid_to_remote_port(
3560 ss->ss_rport_id);
3561 if (ss->ss_rport == NULL) {
3562 iss->iss_flags &= ~(ISS_NULL_TPTID | ISS_BEING_CREATED);
3563 stmf_trace(lport->lport_alias, "Device id to "
3564 "remote port conversion failed");
3565 return (STMF_FAILURE);
3566 }
3567 } else {
3568 if (!stmf_scsilib_tptid_validate(ss->ss_rport->rport_tptid,
3569 ss->ss_rport->rport_tptid_sz, NULL)) {
3570 iss->iss_flags &= ~ISS_BEING_CREATED;
3571 stmf_trace(lport->lport_alias, "Remote port "
3572 "transport id validation failed");
3573 return (STMF_FAILURE);
3574 }
3575 }
3576
3577 /* sessions use the ilport_lock. No separate lock is required */
3578 iss->iss_lockp = &ilport->ilport_lock;
3579
3580 if (iss->iss_sm != NULL)
3581 cmn_err(CE_PANIC, "create lun map called with non NULL map");
3582 iss->iss_sm = (stmf_lun_map_t *)kmem_zalloc(sizeof (stmf_lun_map_t),
3583 KM_SLEEP);
3584
3585 mutex_enter(&stmf_state.stmf_lock);
3586 rw_enter(&ilport->ilport_lock, RW_WRITER);
3587 (void) stmf_session_create_lun_map(ilport, iss);
3588 ilport->ilport_nsessions++;
3589 iss->iss_next = ilport->ilport_ss_list;
3590 ilport->ilport_ss_list = iss;
3591 rw_exit(&ilport->ilport_lock);
3592 mutex_exit(&stmf_state.stmf_lock);
3593
3594 iss->iss_creation_time = ddi_get_time();
3595 ss->ss_session_id = atomic_inc_64_nv(&stmf_session_counter);
3596 iss->iss_flags &= ~ISS_BEING_CREATED;
3597 /* XXX should we remove ISS_LUN_INVENTORY_CHANGED on new session? */
3598 iss->iss_flags &= ~ISS_LUN_INVENTORY_CHANGED;
3599 DTRACE_PROBE2(session__online, stmf_local_port_t *, lport,
3600 stmf_scsi_session_t *, ss);
3601 return (STMF_SUCCESS);
3602 }
3603
3604 void
3605 stmf_deregister_scsi_session(stmf_local_port_t *lport, stmf_scsi_session_t *ss)
3606 {
3607 stmf_i_local_port_t *ilport = (stmf_i_local_port_t *)
3608 lport->lport_stmf_private;
3609 stmf_i_scsi_session_t *iss, **ppss;
3610 int found = 0;
3611 stmf_ic_msg_t *ic_session_dereg;
3612 stmf_status_t ic_ret = STMF_FAILURE;
3613
3614 DTRACE_PROBE2(session__offline, stmf_local_port_t *, lport,
3615 stmf_scsi_session_t *, ss);
3616
3617 iss = (stmf_i_scsi_session_t *)ss->ss_stmf_private;
3618 if (ss->ss_rport_alias) {
3619 ss->ss_rport_alias = NULL;
3620 }
3621
3622 try_dereg_ss_again:
3623 mutex_enter(&stmf_state.stmf_lock);
3624 atomic_and_32(&iss->iss_flags,
3625 ~(ISS_LUN_INVENTORY_CHANGED | ISS_GOT_INITIAL_LUNS));
3626 if (iss->iss_flags & ISS_EVENT_ACTIVE) {
3627 mutex_exit(&stmf_state.stmf_lock);
3628 delay(1);
3629 goto try_dereg_ss_again;
3630 }
3631
3632 /* dereg proxy session if not standby port */
3633 if (stmf_state.stmf_alua_state == 1 &&
3634 ilport->ilport_standby == 0 &&
3635 ilport->ilport_alua == 1) {
3636 ic_session_dereg = ic_session_dereg_msg_alloc(
3637 ss, stmf_proxy_msg_id);
3638 if (ic_session_dereg) {
3639 ic_ret = ic_tx_msg(ic_session_dereg);
3640 if (ic_ret == STMF_IC_MSG_SUCCESS) {
3641 stmf_proxy_msg_id++;
3642 }
3643 }
3644 }
3645
3646 rw_enter(&ilport->ilport_lock, RW_WRITER);
3647 for (ppss = &ilport->ilport_ss_list; *ppss != NULL;
3648 ppss = &((*ppss)->iss_next)) {
3649 if (iss == (*ppss)) {
3650 *ppss = (*ppss)->iss_next;
3651 found = 1;
3652 break;
3653 }
3654 }
3655 if (!found) {
3656 cmn_err(CE_PANIC, "Deregister session called for non existent"
3657 " session");
3658 }
3659 ilport->ilport_nsessions--;
3660
3661 stmf_irport_deregister(iss->iss_irport);
3662 (void) stmf_session_destroy_lun_map(ilport, iss);
3663 rw_exit(&ilport->ilport_lock);
3664 mutex_exit(&stmf_state.stmf_lock);
3665
3666 if (iss->iss_flags & ISS_NULL_TPTID) {
3667 stmf_remote_port_free(ss->ss_rport);
3668 }
3669 }
3670
3671 stmf_i_scsi_session_t *
3672 stmf_session_id_to_issptr(uint64_t session_id, int stay_locked)
3673 {
3674 stmf_i_local_port_t *ilport;
3675 stmf_i_scsi_session_t *iss;
3676
3677 mutex_enter(&stmf_state.stmf_lock);
3678 for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
3679 ilport = ilport->ilport_next) {
3680 rw_enter(&ilport->ilport_lock, RW_WRITER);
3681 for (iss = ilport->ilport_ss_list; iss != NULL;
3682 iss = iss->iss_next) {
3683 if (iss->iss_ss->ss_session_id == session_id) {
3684 if (!stay_locked)
3685 rw_exit(&ilport->ilport_lock);
3686 mutex_exit(&stmf_state.stmf_lock);
3687 return (iss);
3688 }
3689 }
3690 rw_exit(&ilport->ilport_lock);
3691 }
3692 mutex_exit(&stmf_state.stmf_lock);
3693 return (NULL);
3694 }
3695
3696 void
3697 stmf_release_itl_handle(stmf_lu_t *lu, stmf_itl_data_t *itl)
3698 {
3699 stmf_itl_data_t **itlpp;
3700 stmf_i_lu_t *ilu;
3701
3702 ASSERT(itl->itl_flags & STMF_ITL_BEING_TERMINATED);
3703
3704 ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
3705 mutex_enter(&ilu->ilu_task_lock);
3706 for (itlpp = &ilu->ilu_itl_list; (*itlpp) != NULL;
3707 itlpp = &(*itlpp)->itl_next) {
3708 if ((*itlpp) == itl)
3709 break;
3710 }
3711 ASSERT((*itlpp) != NULL);
3712 *itlpp = itl->itl_next;
3713 mutex_exit(&ilu->ilu_task_lock);
3714 lu->lu_abort(lu, STMF_LU_ITL_HANDLE_REMOVED, itl->itl_handle,
3715 (uint32_t)itl->itl_hdlrm_reason);
3716
3717 kmem_free(itl, sizeof (*itl));
3718 }
3719
3720 stmf_status_t
3721 stmf_register_itl_handle(stmf_lu_t *lu, uint8_t *lun,
3722 stmf_scsi_session_t *ss, uint64_t session_id, void *itl_handle)
3723 {
3724 stmf_itl_data_t *itl;
3725 stmf_i_scsi_session_t *iss;
3726 stmf_lun_map_ent_t *lun_map_ent;
3727 stmf_i_lu_t *ilu;
3728 uint16_t n;
3729
3730 ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
3731 if (ss == NULL) {
3732 iss = stmf_session_id_to_issptr(session_id, 1);
3733 if (iss == NULL)
3734 return (STMF_NOT_FOUND);
3735 } else {
3736 iss = (stmf_i_scsi_session_t *)ss->ss_stmf_private;
3737 }
3738
3739 mutex_enter(&stmf_state.stmf_lock);
3740 rw_enter(iss->iss_lockp, RW_WRITER);
3741 n = ((uint16_t)lun[1] | (((uint16_t)(lun[0] & 0x3F)) << 8));
3742 lun_map_ent = (stmf_lun_map_ent_t *)
3743 stmf_get_ent_from_map(iss->iss_sm, n);
3744 if ((lun_map_ent == NULL) || (lun_map_ent->ent_lu != lu)) {
3745 rw_exit(iss->iss_lockp);
3746 mutex_exit(&stmf_state.stmf_lock);
3747 return (STMF_NOT_FOUND);
3748 }
3749 if (lun_map_ent->ent_itl_datap != NULL) {
3750 rw_exit(iss->iss_lockp);
3751 mutex_exit(&stmf_state.stmf_lock);
3752 return (STMF_ALREADY);
3753 }
3754
3755 itl = (stmf_itl_data_t *)kmem_zalloc(sizeof (*itl), KM_NOSLEEP);
3756 if (itl == NULL) {
3757 rw_exit(iss->iss_lockp);
3758 mutex_exit(&stmf_state.stmf_lock);
3759 return (STMF_ALLOC_FAILURE);
3760 }
3761
3762 itl->itl_ilu = ilu;
3763 itl->itl_session = iss;
3764 itl->itl_counter = 1;
3765 itl->itl_lun = n;
3766 itl->itl_handle = itl_handle;
3767
3768 mutex_enter(&ilu->ilu_task_lock);
3769 itl->itl_next = ilu->ilu_itl_list;
3770 ilu->ilu_itl_list = itl;
3771 mutex_exit(&ilu->ilu_task_lock);
3772 lun_map_ent->ent_itl_datap = itl;
3773 rw_exit(iss->iss_lockp);
3774 mutex_exit(&stmf_state.stmf_lock);
3775
3776 return (STMF_SUCCESS);
3777 }
3778
3779 void
3780 stmf_do_itl_dereg(stmf_lu_t *lu, stmf_itl_data_t *itl, uint8_t hdlrm_reason)
3781 {
3782 uint8_t old, new;
3783
3784 do {
3785 old = new = itl->itl_flags;
3786 if (old & STMF_ITL_BEING_TERMINATED)
3787 return;
3788 new |= STMF_ITL_BEING_TERMINATED;
3789 } while (atomic_cas_8(&itl->itl_flags, old, new) != old);
3790 itl->itl_hdlrm_reason = hdlrm_reason;
3791
3792 ASSERT(itl->itl_counter);
3793
3794 if (atomic_dec_32_nv(&itl->itl_counter))
3795 return;
3796
3797 stmf_release_itl_handle(lu, itl);
3798 }
3799
3800 stmf_status_t
3801 stmf_deregister_all_lu_itl_handles(stmf_lu_t *lu)
3802 {
3803 stmf_i_lu_t *ilu;
3804 stmf_i_local_port_t *ilport;
3805 stmf_i_scsi_session_t *iss;
3806 stmf_lun_map_t *lm;
3807 stmf_lun_map_ent_t *ent;
3808 uint32_t nmaps, nu;
3809 stmf_itl_data_t **itl_list;
3810 int i;
3811
3812 ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
3813
3814 dereg_itl_start:;
3815 nmaps = ilu->ilu_ref_cnt;
3816 if (nmaps == 0)
3817 return (STMF_NOT_FOUND);
3818 itl_list = (stmf_itl_data_t **)kmem_zalloc(
3819 nmaps * sizeof (stmf_itl_data_t *), KM_SLEEP);
3820 mutex_enter(&stmf_state.stmf_lock);
3821 if (nmaps != ilu->ilu_ref_cnt) {
3822 /* Something changed, start all over */
3823 mutex_exit(&stmf_state.stmf_lock);
3824 kmem_free(itl_list, nmaps * sizeof (stmf_itl_data_t *));
3825 goto dereg_itl_start;
3826 }
3827 nu = 0;
3828 for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
3829 ilport = ilport->ilport_next) {
3830 rw_enter(&ilport->ilport_lock, RW_WRITER);
3831 for (iss = ilport->ilport_ss_list; iss != NULL;
3832 iss = iss->iss_next) {
3833 lm = iss->iss_sm;
3834 if (!lm)
3835 continue;
3836 for (i = 0; i < lm->lm_nentries; i++) {
3837 if (lm->lm_plus[i] == NULL)
3838 continue;
3839 ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
3840 if ((ent->ent_lu == lu) &&
3841 (ent->ent_itl_datap)) {
3842 itl_list[nu++] = ent->ent_itl_datap;
3843 ent->ent_itl_datap = NULL;
3844 if (nu == nmaps) {
3845 rw_exit(&ilport->ilport_lock);
3846 goto dai_scan_done;
3847 }
3848 }
3849 } /* lun table for a session */
3850 } /* sessions */
3851 rw_exit(&ilport->ilport_lock);
3852 } /* ports */
3853
3854 dai_scan_done:
3855 mutex_exit(&stmf_state.stmf_lock);
3856
3857 for (i = 0; i < nu; i++) {
3858 stmf_do_itl_dereg(lu, itl_list[i],
3859 STMF_ITL_REASON_DEREG_REQUEST);
3860 }
3861 kmem_free(itl_list, nmaps * sizeof (stmf_itl_data_t *));
3862
3863 return (STMF_SUCCESS);
3864 }
3865
3866 stmf_status_t
3867 stmf_get_itl_handle(stmf_lu_t *lu, uint8_t *lun, stmf_scsi_session_t *ss,
3868 uint64_t session_id, void **itl_handle_retp)
3869 {
3870 stmf_i_scsi_session_t *iss;
3871 stmf_lun_map_ent_t *ent;
3872 stmf_lun_map_t *lm;
3873 stmf_status_t ret;
3874 int i;
3875 uint16_t n;
3876
3877 if (ss == NULL) {
3878 iss = stmf_session_id_to_issptr(session_id, 1);
3879 if (iss == NULL)
3880 return (STMF_NOT_FOUND);
3881 } else {
3882 iss = (stmf_i_scsi_session_t *)ss->ss_stmf_private;
3883 rw_enter(iss->iss_lockp, RW_WRITER);
3884 }
3885
3886 ent = NULL;
3887 if (lun == NULL) {
3888 lm = iss->iss_sm;
3889 for (i = 0; i < lm->lm_nentries; i++) {
3890 if (lm->lm_plus[i] == NULL)
3891 continue;
3892 ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
3893 if (ent->ent_lu == lu)
3894 break;
3895 }
3896 } else {
3897 n = ((uint16_t)lun[1] | (((uint16_t)(lun[0] & 0x3F)) << 8));
3898 ent = (stmf_lun_map_ent_t *)
3899 stmf_get_ent_from_map(iss->iss_sm, n);
3900 if (lu && (ent->ent_lu != lu))
3901 ent = NULL;
3902 }
3903 if (ent && ent->ent_itl_datap) {
3904 *itl_handle_retp = ent->ent_itl_datap->itl_handle;
3905 ret = STMF_SUCCESS;
3906 } else {
3907 ret = STMF_NOT_FOUND;
3908 }
3909
3910 rw_exit(iss->iss_lockp);
3911 return (ret);
3912 }
3913
3914 stmf_data_buf_t *
3915 stmf_alloc_dbuf(scsi_task_t *task, uint32_t size, uint32_t *pminsize,
3916 uint32_t flags)
3917 {
3918 stmf_i_scsi_task_t *itask =
3919 (stmf_i_scsi_task_t *)task->task_stmf_private;
3920 stmf_local_port_t *lport = task->task_lport;
3921 stmf_data_buf_t *dbuf;
3922 uint8_t ndx;
3923
3924 ndx = stmf_first_zero[itask->itask_allocated_buf_map];
3925 if (ndx == 0xff)
3926 return (NULL);
3927 dbuf = itask->itask_dbufs[ndx] = lport->lport_ds->ds_alloc_data_buf(
3928 task, size, pminsize, flags);
3929 if (dbuf) {
3930 task->task_cur_nbufs++;
3931 itask->itask_allocated_buf_map |= (1 << ndx);
3932 dbuf->db_flags &= ~DB_LPORT_XFER_ACTIVE;
3933 dbuf->db_handle = ndx;
3934 return (dbuf);
3935 }
3936
3937 return (NULL);
3938 }
3939
3940 stmf_status_t
3941 stmf_setup_dbuf(scsi_task_t *task, stmf_data_buf_t *dbuf, uint32_t flags)
3942 {
3943 stmf_i_scsi_task_t *itask =
3944 (stmf_i_scsi_task_t *)task->task_stmf_private;
3945 stmf_local_port_t *lport = task->task_lport;
3946 uint8_t ndx;
3947 stmf_status_t ret;
3948
3949 ASSERT(task->task_additional_flags & TASK_AF_ACCEPT_LU_DBUF);
3950 ASSERT(lport->lport_ds->ds_setup_dbuf != NULL);
3951 ASSERT(dbuf->db_flags & DB_LU_DATA_BUF);
3952
3953 if ((task->task_additional_flags & TASK_AF_ACCEPT_LU_DBUF) == 0)
3954 return (STMF_FAILURE);
3955 if (lport->lport_ds->ds_setup_dbuf == NULL)
3956 return (STMF_FAILURE);
3957
3958 ndx = stmf_first_zero[itask->itask_allocated_buf_map];
3959 if (ndx == 0xff)
3960 return (STMF_FAILURE);
3961 ret = lport->lport_ds->ds_setup_dbuf(task, dbuf, flags);
3962 if (ret == STMF_FAILURE)
3963 return (STMF_FAILURE);
3964 itask->itask_dbufs[ndx] = dbuf;
3965 task->task_cur_nbufs++;
3966 itask->itask_allocated_buf_map |= (1 << ndx);
3967 dbuf->db_handle = ndx;
3968
3969 return (STMF_SUCCESS);
3970 }
3971
3972 void
3973 stmf_teardown_dbuf(scsi_task_t *task, stmf_data_buf_t *dbuf)
3974 {
3975 stmf_i_scsi_task_t *itask =
3976 (stmf_i_scsi_task_t *)task->task_stmf_private;
3977 stmf_local_port_t *lport = task->task_lport;
3978
3979 ASSERT(task->task_additional_flags & TASK_AF_ACCEPT_LU_DBUF);
3980 ASSERT(lport->lport_ds->ds_teardown_dbuf != NULL);
3981 ASSERT(dbuf->db_flags & DB_LU_DATA_BUF);
3982
3983 itask->itask_allocated_buf_map &= ~(1 << dbuf->db_handle);
3984 task->task_cur_nbufs--;
3985 lport->lport_ds->ds_teardown_dbuf(lport->lport_ds, dbuf);
3986 }
3987
3988 void
3989 stmf_free_dbuf(scsi_task_t *task, stmf_data_buf_t *dbuf)
3990 {
3991 stmf_i_scsi_task_t *itask =
3992 (stmf_i_scsi_task_t *)task->task_stmf_private;
3993 stmf_local_port_t *lport = task->task_lport;
3994
3995 itask->itask_allocated_buf_map &= ~(1 << dbuf->db_handle);
3996 task->task_cur_nbufs--;
3997 lport->lport_ds->ds_free_data_buf(lport->lport_ds, dbuf);
3998 }
3999
4000 stmf_data_buf_t *
4001 stmf_handle_to_buf(scsi_task_t *task, uint8_t h)
4002 {
4003 stmf_i_scsi_task_t *itask;
4004
4005 itask = (stmf_i_scsi_task_t *)task->task_stmf_private;
4006 if (h > 3)
4007 return (NULL);
4008 return (itask->itask_dbufs[h]);
4009 }
4010
4011 /* ARGSUSED */
4012 struct scsi_task *
4013 stmf_task_alloc(struct stmf_local_port *lport, stmf_scsi_session_t *ss,
4014 uint8_t *lun, uint16_t cdb_length_in, uint16_t ext_id)
4015 {
4016 stmf_lu_t *lu;
4017 stmf_i_scsi_session_t *iss;
4018 stmf_i_lu_t *ilu;
4019 stmf_i_scsi_task_t *itask;
4020 stmf_i_scsi_task_t **ppitask;
4021 scsi_task_t *task;
4022 uint8_t *l;
4023 stmf_lun_map_ent_t *lun_map_ent;
4024 uint16_t cdb_length;
4025 uint16_t luNbr;
4026 uint8_t new_task = 0;
4027
4028 /*
4029 * We allocate 7 extra bytes for CDB to provide a cdb pointer which
4030 * is guaranteed to be 8 byte aligned. Some LU providers like OSD
4031 * depend upon this alignment.
4032 */
4033 if (cdb_length_in >= 16)
4034 cdb_length = cdb_length_in + 7;
4035 else
4036 cdb_length = 16 + 7;
4037 iss = (stmf_i_scsi_session_t *)ss->ss_stmf_private;
4038 luNbr = ((uint16_t)lun[1] | (((uint16_t)(lun[0] & 0x3F)) << 8));
4039 rw_enter(iss->iss_lockp, RW_READER);
4040 lun_map_ent =
4041 (stmf_lun_map_ent_t *)stmf_get_ent_from_map(iss->iss_sm, luNbr);
4042 if (!lun_map_ent) {
4043 lu = dlun0;
4044 } else {
4045 lu = lun_map_ent->ent_lu;
4046 }
4047 ilu = lu->lu_stmf_private;
4048 if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
4049 rw_exit(iss->iss_lockp);
4050 return (NULL);
4051 }
4052 ASSERT(lu == dlun0 || (ilu->ilu_state != STMF_STATE_OFFLINING &&
4053 ilu->ilu_state != STMF_STATE_OFFLINE));
4054 do {
4055 if (ilu->ilu_free_tasks == NULL) {
4056 new_task = 1;
4057 break;
4058 }
4059 mutex_enter(&ilu->ilu_task_lock);
4060 for (ppitask = &ilu->ilu_free_tasks; (*ppitask != NULL) &&
4061 ((*ppitask)->itask_cdb_buf_size < cdb_length);
4062 ppitask = &((*ppitask)->itask_lu_free_next))
4063 ;
4064 if (*ppitask) {
4065 itask = *ppitask;
4066 *ppitask = (*ppitask)->itask_lu_free_next;
4067 ilu->ilu_ntasks_free--;
4068 if (ilu->ilu_ntasks_free < ilu->ilu_ntasks_min_free)
4069 ilu->ilu_ntasks_min_free = ilu->ilu_ntasks_free;
4070 } else {
4071 new_task = 1;
4072 }
4073 mutex_exit(&ilu->ilu_task_lock);
4074 /* CONSTCOND */
4075 } while (0);
4076
4077 if (!new_task) {
4078 /*
4079 * Save the task_cdb pointer and zero per cmd fields.
4080 * We know the task_cdb_length is large enough by task
4081 * selection process above.
4082 */
4083 uint8_t *save_cdb;
4084 uintptr_t t_start, t_end;
4085
4086 task = itask->itask_task;
4087 save_cdb = task->task_cdb; /* save */
4088 t_start = (uintptr_t)&task->task_flags;
4089 t_end = (uintptr_t)&task->task_extended_cmd;
4090 bzero((void *)t_start, (size_t)(t_end - t_start));
4091 task->task_cdb = save_cdb; /* restore */
4092 itask->itask_ncmds = 0;
4093 } else {
4094 task = (scsi_task_t *)stmf_alloc(STMF_STRUCT_SCSI_TASK,
4095 cdb_length, AF_FORCE_NOSLEEP);
4096 if (task == NULL) {
4097 rw_exit(iss->iss_lockp);
4098 return (NULL);
4099 }
4100 task->task_lu = lu;
4101 l = task->task_lun_no;
4102 l[0] = lun[0];
4103 l[1] = lun[1];
4104 l[2] = lun[2];
4105 l[3] = lun[3];
4106 l[4] = lun[4];
4107 l[5] = lun[5];
4108 l[6] = lun[6];
4109 l[7] = lun[7];
4110 task->task_cdb = (uint8_t *)task->task_port_private;
4111 if ((ulong_t)(task->task_cdb) & 7ul) {
4112 task->task_cdb = (uint8_t *)(((ulong_t)
4113 (task->task_cdb) + 7ul) & ~(7ul));
4114 }
4115 itask = (stmf_i_scsi_task_t *)task->task_stmf_private;
4116 itask->itask_cdb_buf_size = cdb_length;
4117 mutex_init(&itask->itask_audit_mutex, NULL, MUTEX_DRIVER, NULL);
4118 }
4119 task->task_session = ss;
4120 task->task_lport = lport;
4121 task->task_cdb_length = cdb_length_in;
4122 itask->itask_flags = ITASK_IN_TRANSITION;
4123 itask->itask_waitq_time = 0;
4124 itask->itask_lu_read_time = itask->itask_lu_write_time = 0;
4125 itask->itask_lport_read_time = itask->itask_lport_write_time = 0;
4126 itask->itask_read_xfer = itask->itask_write_xfer = 0;
4127 itask->itask_audit_index = 0;
4128
4129 if (new_task) {
4130 if (lu->lu_task_alloc(task) != STMF_SUCCESS) {
4131 rw_exit(iss->iss_lockp);
4132 stmf_free(task);
4133 return (NULL);
4134 }
4135 mutex_enter(&ilu->ilu_task_lock);
4136 if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
4137 mutex_exit(&ilu->ilu_task_lock);
4138 rw_exit(iss->iss_lockp);
4139 stmf_free(task);
4140 return (NULL);
4141 }
4142 itask->itask_lu_next = ilu->ilu_tasks;
4143 if (ilu->ilu_tasks)
4144 ilu->ilu_tasks->itask_lu_prev = itask;
4145 ilu->ilu_tasks = itask;
4146 /* kmem_zalloc automatically makes itask->itask_lu_prev NULL */
4147 ilu->ilu_ntasks++;
4148 mutex_exit(&ilu->ilu_task_lock);
4149 }
4150
4151 itask->itask_ilu_task_cntr = ilu->ilu_cur_task_cntr;
4152 atomic_inc_32(itask->itask_ilu_task_cntr);
4153 itask->itask_start_time = ddi_get_lbolt();
4154
4155 if ((lun_map_ent != NULL) && ((itask->itask_itl_datap =
4156 lun_map_ent->ent_itl_datap) != NULL)) {
4157 atomic_inc_32(&itask->itask_itl_datap->itl_counter);
4158 task->task_lu_itl_handle = itask->itask_itl_datap->itl_handle;
4159 } else {
4160 itask->itask_itl_datap = NULL;
4161 task->task_lu_itl_handle = NULL;
4162 }
4163
4164 rw_exit(iss->iss_lockp);
4165 return (task);
4166 }
4167
4168 static void
4169 stmf_task_lu_free(scsi_task_t *task, stmf_i_scsi_session_t *iss)
4170 {
4171 stmf_i_scsi_task_t *itask =
4172 (stmf_i_scsi_task_t *)task->task_stmf_private;
4173 stmf_i_lu_t *ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
4174
4175 ASSERT(rw_lock_held(iss->iss_lockp));
4176 itask->itask_flags = ITASK_IN_FREE_LIST;
4177 itask->itask_proxy_msg_id = 0;
4178 mutex_enter(&ilu->ilu_task_lock);
4179 itask->itask_lu_free_next = ilu->ilu_free_tasks;
4180 ilu->ilu_free_tasks = itask;
4181 ilu->ilu_ntasks_free++;
4182 if (ilu->ilu_ntasks == ilu->ilu_ntasks_free)
4183 cv_signal(&ilu->ilu_offline_pending_cv);
4184 mutex_exit(&ilu->ilu_task_lock);
4185 atomic_dec_32(itask->itask_ilu_task_cntr);
4186 }
4187
4188 void
4189 stmf_task_lu_check_freelist(stmf_i_lu_t *ilu)
4190 {
4191 uint32_t num_to_release, ndx;
4192 stmf_i_scsi_task_t *itask;
4193 stmf_lu_t *lu = ilu->ilu_lu;
4194
4195 ASSERT(ilu->ilu_ntasks_min_free <= ilu->ilu_ntasks_free);
4196
4197 /* free half of the minimal free of the free tasks */
4198 num_to_release = (ilu->ilu_ntasks_min_free + 1) / 2;
4199 if (!num_to_release) {
4200 return;
4201 }
4202 for (ndx = 0; ndx < num_to_release; ndx++) {
4203 mutex_enter(&ilu->ilu_task_lock);
4204 itask = ilu->ilu_free_tasks;
4205 if (itask == NULL) {
4206 mutex_exit(&ilu->ilu_task_lock);
4207 break;
4208 }
4209 ilu->ilu_free_tasks = itask->itask_lu_free_next;
4210 ilu->ilu_ntasks_free--;
4211 mutex_exit(&ilu->ilu_task_lock);
4212
4213 lu->lu_task_free(itask->itask_task);
4214 mutex_enter(&ilu->ilu_task_lock);
4215 if (itask->itask_lu_next)
4216 itask->itask_lu_next->itask_lu_prev =
4217 itask->itask_lu_prev;
4218 if (itask->itask_lu_prev)
4219 itask->itask_lu_prev->itask_lu_next =
4220 itask->itask_lu_next;
4221 else
4222 ilu->ilu_tasks = itask->itask_lu_next;
4223
4224 ilu->ilu_ntasks--;
4225 mutex_exit(&ilu->ilu_task_lock);
4226 stmf_free(itask->itask_task);
4227 }
4228 }
4229
4230 /*
4231 * Called with stmf_lock held
4232 */
4233 void
4234 stmf_check_freetask()
4235 {
4236 stmf_i_lu_t *ilu;
4237 clock_t endtime = ddi_get_lbolt() + drv_usectohz(10000);
4238
4239 /* stmf_svc_ilu_draining may get changed after stmf_lock is released */
4240 while ((ilu = stmf_state.stmf_svc_ilu_draining) != NULL) {
4241 stmf_state.stmf_svc_ilu_draining = ilu->ilu_next;
4242 if (!ilu->ilu_ntasks_min_free) {
4243 ilu->ilu_ntasks_min_free = ilu->ilu_ntasks_free;
4244 continue;
4245 }
4246 ilu->ilu_flags |= ILU_STALL_DEREGISTER;
4247 mutex_exit(&stmf_state.stmf_lock);
4248 stmf_task_lu_check_freelist(ilu);
4249 /*
4250 * we do not care about the accuracy of
4251 * ilu_ntasks_min_free, so we don't lock here
4252 */
4253 ilu->ilu_ntasks_min_free = ilu->ilu_ntasks_free;
4254 mutex_enter(&stmf_state.stmf_lock);
4255 ilu->ilu_flags &= ~ILU_STALL_DEREGISTER;
4256 cv_broadcast(&stmf_state.stmf_cv);
4257 if (ddi_get_lbolt() >= endtime)
4258 break;
4259 }
4260 }
4261
4262 void
4263 stmf_do_ilu_timeouts(stmf_i_lu_t *ilu)
4264 {
4265 clock_t l = ddi_get_lbolt();
4266 clock_t ps = drv_usectohz(1000000);
4267 stmf_i_scsi_task_t *itask;
4268 scsi_task_t *task;
4269 uint32_t to;
4270
4271 mutex_enter(&ilu->ilu_task_lock);
4272 for (itask = ilu->ilu_tasks; itask != NULL;
4273 itask = itask->itask_lu_next) {
4274 if (itask->itask_flags & (ITASK_IN_FREE_LIST |
4275 ITASK_BEING_ABORTED)) {
4276 continue;
4277 }
4278 task = itask->itask_task;
4279 if (task->task_timeout == 0)
4280 to = stmf_default_task_timeout;
4281 else
4282 to = task->task_timeout;
4283 if ((itask->itask_start_time + (to * ps)) > l)
4284 continue;
4285 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
4286 STMF_TIMEOUT, NULL);
4287 }
4288 mutex_exit(&ilu->ilu_task_lock);
4289 }
4290
4291 /*
4292 * Called with stmf_lock held
4293 */
4294 void
4295 stmf_check_ilu_timing()
4296 {
4297 stmf_i_lu_t *ilu;
4298 clock_t endtime = ddi_get_lbolt() + drv_usectohz(10000);
4299
4300 /* stmf_svc_ilu_timing may get changed after stmf_lock is released */
4301 while ((ilu = stmf_state.stmf_svc_ilu_timing) != NULL) {
4302 stmf_state.stmf_svc_ilu_timing = ilu->ilu_next;
4303 if (ilu->ilu_cur_task_cntr == (&ilu->ilu_task_cntr1)) {
4304 if (ilu->ilu_task_cntr2 == 0) {
4305 ilu->ilu_cur_task_cntr = &ilu->ilu_task_cntr2;
4306 continue;
4307 }
4308 } else {
4309 if (ilu->ilu_task_cntr1 == 0) {
4310 ilu->ilu_cur_task_cntr = &ilu->ilu_task_cntr1;
4311 continue;
4312 }
4313 }
4314 /*
4315 * If we are here then it means that there is some slowdown
4316 * in tasks on this lu. We need to check.
4317 */
4318 ilu->ilu_flags |= ILU_STALL_DEREGISTER;
4319 mutex_exit(&stmf_state.stmf_lock);
4320 stmf_do_ilu_timeouts(ilu);
4321 mutex_enter(&stmf_state.stmf_lock);
4322 ilu->ilu_flags &= ~ILU_STALL_DEREGISTER;
4323 cv_broadcast(&stmf_state.stmf_cv);
4324 if (ddi_get_lbolt() >= endtime)
4325 break;
4326 }
4327 }
4328
4329 /*
4330 * Kills all tasks on a lu except tm_task
4331 */
4332 void
4333 stmf_task_lu_killall(stmf_lu_t *lu, scsi_task_t *tm_task, stmf_status_t s)
4334 {
4335 stmf_i_lu_t *ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
4336 stmf_i_scsi_task_t *itask;
4337
4338 mutex_enter(&ilu->ilu_task_lock);
4339
4340 for (itask = ilu->ilu_tasks; itask != NULL;
4341 itask = itask->itask_lu_next) {
4342 if (itask->itask_flags & ITASK_IN_FREE_LIST)
4343 continue;
4344 if (itask->itask_task == tm_task)
4345 continue;
4346 stmf_abort(STMF_QUEUE_TASK_ABORT, itask->itask_task, s, NULL);
4347 }
4348 mutex_exit(&ilu->ilu_task_lock);
4349 }
4350
4351 void
4352 stmf_free_task_bufs(stmf_i_scsi_task_t *itask, stmf_local_port_t *lport)
4353 {
4354 int i;
4355 uint8_t map;
4356
4357 if ((map = itask->itask_allocated_buf_map) == 0)
4358 return;
4359 for (i = 0; i < 4; i++) {
4360 if (map & 1) {
4361 stmf_data_buf_t *dbuf;
4362
4363 dbuf = itask->itask_dbufs[i];
4364 if (dbuf->db_xfer_start_timestamp) {
4365 stmf_lport_xfer_done(itask, dbuf);
4366 }
4367 if (dbuf->db_flags & DB_LU_DATA_BUF) {
4368 /*
4369 * LU needs to clean up buffer.
4370 * LU is required to free the buffer
4371 * in the xfer_done handler.
4372 */
4373 scsi_task_t *task = itask->itask_task;
4374 stmf_lu_t *lu = task->task_lu;
4375
4376 lu->lu_dbuf_free(task, dbuf);
4377 ASSERT(((itask->itask_allocated_buf_map>>i)
4378 & 1) == 0); /* must be gone */
4379 } else {
4380 ASSERT(dbuf->db_lu_private == NULL);
4381 dbuf->db_lu_private = NULL;
4382 lport->lport_ds->ds_free_data_buf(
4383 lport->lport_ds, dbuf);
4384 }
4385 }
4386 map >>= 1;
4387 }
4388 itask->itask_allocated_buf_map = 0;
4389 }
4390
4391 void
4392 stmf_task_free(scsi_task_t *task)
4393 {
4394 stmf_local_port_t *lport = task->task_lport;
4395 stmf_i_scsi_task_t *itask = (stmf_i_scsi_task_t *)
4396 task->task_stmf_private;
4397 stmf_i_scsi_session_t *iss = (stmf_i_scsi_session_t *)
4398 task->task_session->ss_stmf_private;
4399
4400 stmf_task_audit(itask, TE_TASK_FREE, CMD_OR_IOF_NA, NULL);
4401
4402 stmf_free_task_bufs(itask, lport);
4403 stmf_itl_task_done(itask);
4404 DTRACE_PROBE2(stmf__task__end, scsi_task_t *, task,
4405 hrtime_t,
4406 itask->itask_done_timestamp - itask->itask_start_timestamp);
4407 if (itask->itask_itl_datap) {
4408 if (atomic_dec_32_nv(&itask->itask_itl_datap->itl_counter) ==
4409 0) {
4410 stmf_release_itl_handle(task->task_lu,
4411 itask->itask_itl_datap);
4412 }
4413 }
4414
4415 rw_enter(iss->iss_lockp, RW_READER);
4416 lport->lport_task_free(task);
4417 if (itask->itask_worker) {
4418 atomic_dec_32(&stmf_cur_ntasks);
4419 atomic_dec_32(&itask->itask_worker->worker_ref_count);
4420 }
4421 /*
4422 * After calling stmf_task_lu_free, the task pointer can no longer
4423 * be trusted.
4424 */
4425 stmf_task_lu_free(task, iss);
4426 rw_exit(iss->iss_lockp);
4427 }
4428
4429 void
4430 stmf_post_task(scsi_task_t *task, stmf_data_buf_t *dbuf)
4431 {
4432 stmf_i_scsi_task_t *itask = (stmf_i_scsi_task_t *)
4433 task->task_stmf_private;
4434 stmf_i_lu_t *ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
4435 int nv;
4436 uint32_t old, new;
4437 uint32_t ct;
4438 stmf_worker_t *w, *w1;
4439 uint8_t tm;
4440
4441 if (task->task_max_nbufs > 4)
4442 task->task_max_nbufs = 4;
4443 task->task_cur_nbufs = 0;
4444 /* Latest value of currently running tasks */
4445 ct = atomic_inc_32_nv(&stmf_cur_ntasks);
4446
4447 /* Select the next worker using round robin */
4448 nv = (int)atomic_inc_32_nv((uint32_t *)&stmf_worker_sel_counter);
4449 if (nv >= stmf_nworkers_accepting_cmds) {
4450 int s = nv;
4451 do {
4452 nv -= stmf_nworkers_accepting_cmds;
4453 } while (nv >= stmf_nworkers_accepting_cmds);
4454 if (nv < 0)
4455 nv = 0;
4456 /* Its ok if this cas fails */
4457 (void) atomic_cas_32((uint32_t *)&stmf_worker_sel_counter,
4458 s, nv);
4459 }
4460 w = &stmf_workers[nv];
4461
4462 /*
4463 * A worker can be pinned by interrupt. So select the next one
4464 * if it has lower load.
4465 */
4466 if ((nv + 1) >= stmf_nworkers_accepting_cmds) {
4467 w1 = stmf_workers;
4468 } else {
4469 w1 = &stmf_workers[nv + 1];
4470 }
4471 if (w1->worker_queue_depth < w->worker_queue_depth)
4472 w = w1;
4473
4474 mutex_enter(&w->worker_lock);
4475 if (((w->worker_flags & STMF_WORKER_STARTED) == 0) ||
4476 (w->worker_flags & STMF_WORKER_TERMINATE)) {
4477 /*
4478 * Maybe we are in the middle of a change. Just go to
4479 * the 1st worker.
4480 */
4481 mutex_exit(&w->worker_lock);
4482 w = stmf_workers;
4483 mutex_enter(&w->worker_lock);
4484 }
4485 itask->itask_worker = w;
4486 /*
4487 * Track max system load inside the worker as we already have the
4488 * worker lock (no point implementing another lock). The service
4489 * thread will do the comparisons and figure out the max overall
4490 * system load.
4491 */
4492 if (w->worker_max_sys_qdepth_pu < ct)
4493 w->worker_max_sys_qdepth_pu = ct;
4494
4495 do {
4496 old = new = itask->itask_flags;
4497 new |= ITASK_KNOWN_TO_TGT_PORT | ITASK_IN_WORKER_QUEUE;
4498 if (task->task_mgmt_function) {
4499 tm = task->task_mgmt_function;
4500 if ((tm == TM_TARGET_RESET) ||
4501 (tm == TM_TARGET_COLD_RESET) ||
4502 (tm == TM_TARGET_WARM_RESET)) {
4503 new |= ITASK_DEFAULT_HANDLING;
4504 }
4505 } else if (task->task_cdb[0] == SCMD_REPORT_LUNS) {
4506 new |= ITASK_DEFAULT_HANDLING;
4507 }
4508 new &= ~ITASK_IN_TRANSITION;
4509 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4510
4511 stmf_itl_task_start(itask);
4512
4513 itask->itask_worker_next = NULL;
4514 if (w->worker_task_tail) {
4515 w->worker_task_tail->itask_worker_next = itask;
4516 } else {
4517 w->worker_task_head = itask;
4518 }
4519 w->worker_task_tail = itask;
4520 if (++(w->worker_queue_depth) > w->worker_max_qdepth_pu) {
4521 w->worker_max_qdepth_pu = w->worker_queue_depth;
4522 }
4523 /* Measure task waitq time */
4524 itask->itask_waitq_enter_timestamp = gethrtime();
4525 atomic_inc_32(&w->worker_ref_count);
4526 itask->itask_cmd_stack[0] = ITASK_CMD_NEW_TASK;
4527 itask->itask_ncmds = 1;
4528 stmf_task_audit(itask, TE_TASK_START, CMD_OR_IOF_NA, dbuf);
4529 if (dbuf) {
4530 itask->itask_allocated_buf_map = 1;
4531 itask->itask_dbufs[0] = dbuf;
4532 dbuf->db_handle = 0;
4533 } else {
4534 itask->itask_allocated_buf_map = 0;
4535 itask->itask_dbufs[0] = NULL;
4536 }
4537
4538 if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0) {
4539 w->worker_signal_timestamp = gethrtime();
4540 DTRACE_PROBE2(worker__signal, stmf_worker_t *, w,
4541 scsi_task_t *, task);
4542 cv_signal(&w->worker_cv);
4543 }
4544 mutex_exit(&w->worker_lock);
4545
4546 /*
4547 * This can only happen if during stmf_task_alloc(), ILU_RESET_ACTIVE
4548 * was set between checking of ILU_RESET_ACTIVE and clearing of the
4549 * ITASK_IN_FREE_LIST flag. Take care of these "sneaked-in" tasks here.
4550 */
4551 if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
4552 stmf_abort(STMF_QUEUE_TASK_ABORT, task, STMF_ABORTED, NULL);
4553 }
4554 }
4555
4556 static void
4557 stmf_task_audit(stmf_i_scsi_task_t *itask,
4558 task_audit_event_t te, uint32_t cmd_or_iof, stmf_data_buf_t *dbuf)
4559 {
4560 stmf_task_audit_rec_t *ar;
4561
4562 mutex_enter(&itask->itask_audit_mutex);
4563 ar = &itask->itask_audit_records[itask->itask_audit_index++];
4564 itask->itask_audit_index &= (ITASK_TASK_AUDIT_DEPTH - 1);
4565 ar->ta_event = te;
4566 ar->ta_cmd_or_iof = cmd_or_iof;
4567 ar->ta_itask_flags = itask->itask_flags;
4568 ar->ta_dbuf = dbuf;
4569 gethrestime(&ar->ta_timestamp);
4570 mutex_exit(&itask->itask_audit_mutex);
4571 }
4572
4573
4574 /*
4575 * ++++++++++++++ ABORT LOGIC ++++++++++++++++++++
4576 * Once ITASK_BEING_ABORTED is set, ITASK_KNOWN_TO_LU can be reset already
4577 * i.e. before ITASK_BEING_ABORTED being set. But if it was not, it cannot
4578 * be reset until the LU explicitly calls stmf_task_lu_aborted(). Of course
4579 * the LU will make this call only if we call the LU's abort entry point.
4580 * we will only call that entry point if ITASK_KNOWN_TO_LU was set.
4581 *
4582 * Same logic applies for the port.
4583 *
4584 * Also ITASK_BEING_ABORTED will not be allowed to set if both KNOWN_TO_LU
4585 * and KNOWN_TO_TGT_PORT are reset.
4586 *
4587 * +++++++++++++++++++++++++++++++++++++++++++++++
4588 */
4589
4590 stmf_status_t
4591 stmf_xfer_data(scsi_task_t *task, stmf_data_buf_t *dbuf, uint32_t ioflags)
4592 {
4593 stmf_status_t ret = STMF_SUCCESS;
4594
4595 stmf_i_scsi_task_t *itask =
4596 (stmf_i_scsi_task_t *)task->task_stmf_private;
4597
4598 stmf_task_audit(itask, TE_XFER_START, ioflags, dbuf);
4599
4600 if (ioflags & STMF_IOF_LU_DONE) {
4601 uint32_t new, old;
4602 do {
4603 new = old = itask->itask_flags;
4604 if (new & ITASK_BEING_ABORTED)
4605 return (STMF_ABORTED);
4606 new &= ~ITASK_KNOWN_TO_LU;
4607 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4608 }
4609 if (itask->itask_flags & ITASK_BEING_ABORTED)
4610 return (STMF_ABORTED);
4611 #ifdef DEBUG
4612 if (!(ioflags & STMF_IOF_STATS_ONLY) && stmf_drop_buf_counter > 0) {
4613 if (atomic_dec_32_nv(&stmf_drop_buf_counter) == 1)
4614 return (STMF_SUCCESS);
4615 }
4616 #endif
4617
4618 stmf_update_kstat_lu_io(task, dbuf);
4619 stmf_update_kstat_lport_io(task, dbuf);
4620 stmf_lport_xfer_start(itask, dbuf);
4621 if (ioflags & STMF_IOF_STATS_ONLY) {
4622 stmf_lport_xfer_done(itask, dbuf);
4623 return (STMF_SUCCESS);
4624 }
4625
4626 dbuf->db_flags |= DB_LPORT_XFER_ACTIVE;
4627 ret = task->task_lport->lport_xfer_data(task, dbuf, ioflags);
4628
4629 /*
4630 * Port provider may have already called the buffer callback in
4631 * which case dbuf->db_xfer_start_timestamp will be 0.
4632 */
4633 if (ret != STMF_SUCCESS) {
4634 dbuf->db_flags &= ~DB_LPORT_XFER_ACTIVE;
4635 if (dbuf->db_xfer_start_timestamp != 0)
4636 stmf_lport_xfer_done(itask, dbuf);
4637 }
4638
4639 return (ret);
4640 }
4641
4642 void
4643 stmf_data_xfer_done(scsi_task_t *task, stmf_data_buf_t *dbuf, uint32_t iof)
4644 {
4645 stmf_i_scsi_task_t *itask =
4646 (stmf_i_scsi_task_t *)task->task_stmf_private;
4647 stmf_i_local_port_t *ilport;
4648 stmf_worker_t *w = itask->itask_worker;
4649 uint32_t new, old;
4650 uint8_t update_queue_flags, free_it, queue_it;
4651
4652 stmf_lport_xfer_done(itask, dbuf);
4653
4654 stmf_task_audit(itask, TE_XFER_DONE, iof, dbuf);
4655
4656 /* Guard against unexpected completions from the lport */
4657 if (dbuf->db_flags & DB_LPORT_XFER_ACTIVE) {
4658 dbuf->db_flags &= ~DB_LPORT_XFER_ACTIVE;
4659 } else {
4660 /*
4661 * This should never happen.
4662 */
4663 ilport = task->task_lport->lport_stmf_private;
4664 ilport->ilport_unexpected_comp++;
4665 cmn_err(CE_PANIC, "Unexpected xfer completion task %p dbuf %p",
4666 (void *)task, (void *)dbuf);
4667 return;
4668 }
4669
4670 mutex_enter(&w->worker_lock);
4671 do {
4672 new = old = itask->itask_flags;
4673 if (old & ITASK_BEING_ABORTED) {
4674 mutex_exit(&w->worker_lock);
4675 return;
4676 }
4677 free_it = 0;
4678 if (iof & STMF_IOF_LPORT_DONE) {
4679 new &= ~ITASK_KNOWN_TO_TGT_PORT;
4680 task->task_completion_status = dbuf->db_xfer_status;
4681 free_it = 1;
4682 }
4683 /*
4684 * If the task is known to LU then queue it. But if
4685 * it is already queued (multiple completions) then
4686 * just update the buffer information by grabbing the
4687 * worker lock. If the task is not known to LU,
4688 * completed/aborted, then see if we need to
4689 * free this task.
4690 */
4691 if (old & ITASK_KNOWN_TO_LU) {
4692 free_it = 0;
4693 update_queue_flags = 1;
4694 if (old & ITASK_IN_WORKER_QUEUE) {
4695 queue_it = 0;
4696 } else {
4697 queue_it = 1;
4698 new |= ITASK_IN_WORKER_QUEUE;
4699 }
4700 } else {
4701 update_queue_flags = 0;
4702 queue_it = 0;
4703 }
4704 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4705
4706 if (update_queue_flags) {
4707 uint8_t cmd = (dbuf->db_handle << 5) | ITASK_CMD_DATA_XFER_DONE;
4708
4709 ASSERT(itask->itask_ncmds < ITASK_MAX_NCMDS);
4710 itask->itask_cmd_stack[itask->itask_ncmds++] = cmd;
4711 if (queue_it) {
4712 itask->itask_worker_next = NULL;
4713 if (w->worker_task_tail) {
4714 w->worker_task_tail->itask_worker_next = itask;
4715 } else {
4716 w->worker_task_head = itask;
4717 }
4718 w->worker_task_tail = itask;
4719 /* Measure task waitq time */
4720 itask->itask_waitq_enter_timestamp = gethrtime();
4721 if (++(w->worker_queue_depth) >
4722 w->worker_max_qdepth_pu) {
4723 w->worker_max_qdepth_pu = w->worker_queue_depth;
4724 }
4725 if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0)
4726 cv_signal(&w->worker_cv);
4727 }
4728 }
4729 mutex_exit(&w->worker_lock);
4730
4731 if (free_it) {
4732 if ((itask->itask_flags & (ITASK_KNOWN_TO_LU |
4733 ITASK_KNOWN_TO_TGT_PORT | ITASK_IN_WORKER_QUEUE |
4734 ITASK_BEING_ABORTED)) == 0) {
4735 stmf_task_free(task);
4736 }
4737 }
4738 }
4739
4740 stmf_status_t
4741 stmf_send_scsi_status(scsi_task_t *task, uint32_t ioflags)
4742 {
4743 DTRACE_PROBE1(scsi__send__status, scsi_task_t *, task);
4744
4745 stmf_i_scsi_task_t *itask =
4746 (stmf_i_scsi_task_t *)task->task_stmf_private;
4747
4748 stmf_task_audit(itask, TE_SEND_STATUS, ioflags, NULL);
4749
4750 if (ioflags & STMF_IOF_LU_DONE) {
4751 uint32_t new, old;
4752 do {
4753 new = old = itask->itask_flags;
4754 if (new & ITASK_BEING_ABORTED)
4755 return (STMF_ABORTED);
4756 new &= ~ITASK_KNOWN_TO_LU;
4757 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4758 }
4759
4760 if (!(itask->itask_flags & ITASK_KNOWN_TO_TGT_PORT)) {
4761 return (STMF_SUCCESS);
4762 }
4763
4764 if (itask->itask_flags & ITASK_BEING_ABORTED)
4765 return (STMF_ABORTED);
4766
4767 if (task->task_additional_flags & TASK_AF_NO_EXPECTED_XFER_LENGTH) {
4768 task->task_status_ctrl = 0;
4769 task->task_resid = 0;
4770 } else if (task->task_cmd_xfer_length >
4771 task->task_expected_xfer_length) {
4772 task->task_status_ctrl = TASK_SCTRL_OVER;
4773 task->task_resid = task->task_cmd_xfer_length -
4774 task->task_expected_xfer_length;
4775 } else if (task->task_nbytes_transferred <
4776 task->task_expected_xfer_length) {
4777 task->task_status_ctrl = TASK_SCTRL_UNDER;
4778 task->task_resid = task->task_expected_xfer_length -
4779 task->task_nbytes_transferred;
4780 } else {
4781 task->task_status_ctrl = 0;
4782 task->task_resid = 0;
4783 }
4784 return (task->task_lport->lport_send_status(task, ioflags));
4785 }
4786
4787 void
4788 stmf_send_status_done(scsi_task_t *task, stmf_status_t s, uint32_t iof)
4789 {
4790 stmf_i_scsi_task_t *itask =
4791 (stmf_i_scsi_task_t *)task->task_stmf_private;
4792 stmf_worker_t *w = itask->itask_worker;
4793 uint32_t new, old;
4794 uint8_t free_it, queue_it;
4795
4796 stmf_task_audit(itask, TE_SEND_STATUS_DONE, iof, NULL);
4797
4798 mutex_enter(&w->worker_lock);
4799 do {
4800 new = old = itask->itask_flags;
4801 if (old & ITASK_BEING_ABORTED) {
4802 mutex_exit(&w->worker_lock);
4803 return;
4804 }
4805 free_it = 0;
4806 if (iof & STMF_IOF_LPORT_DONE) {
4807 new &= ~ITASK_KNOWN_TO_TGT_PORT;
4808 free_it = 1;
4809 }
4810 /*
4811 * If the task is known to LU then queue it. But if
4812 * it is already queued (multiple completions) then
4813 * just update the buffer information by grabbing the
4814 * worker lock. If the task is not known to LU,
4815 * completed/aborted, then see if we need to
4816 * free this task.
4817 */
4818 if (old & ITASK_KNOWN_TO_LU) {
4819 free_it = 0;
4820 queue_it = 1;
4821 if (old & ITASK_IN_WORKER_QUEUE) {
4822 cmn_err(CE_PANIC, "status completion received"
4823 " when task is already in worker queue "
4824 " task = %p", (void *)task);
4825 }
4826 new |= ITASK_IN_WORKER_QUEUE;
4827 } else {
4828 queue_it = 0;
4829 }
4830 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4831 task->task_completion_status = s;
4832
4833
4834 if (queue_it) {
4835 ASSERT(itask->itask_ncmds < ITASK_MAX_NCMDS);
4836 itask->itask_cmd_stack[itask->itask_ncmds++] =
4837 ITASK_CMD_STATUS_DONE;
4838 itask->itask_worker_next = NULL;
4839 if (w->worker_task_tail) {
4840 w->worker_task_tail->itask_worker_next = itask;
4841 } else {
4842 w->worker_task_head = itask;
4843 }
4844 w->worker_task_tail = itask;
4845 /* Measure task waitq time */
4846 itask->itask_waitq_enter_timestamp = gethrtime();
4847 if (++(w->worker_queue_depth) > w->worker_max_qdepth_pu) {
4848 w->worker_max_qdepth_pu = w->worker_queue_depth;
4849 }
4850 if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0)
4851 cv_signal(&w->worker_cv);
4852 }
4853 mutex_exit(&w->worker_lock);
4854
4855 if (free_it) {
4856 if ((itask->itask_flags & (ITASK_KNOWN_TO_LU |
4857 ITASK_KNOWN_TO_TGT_PORT | ITASK_IN_WORKER_QUEUE |
4858 ITASK_BEING_ABORTED)) == 0) {
4859 stmf_task_free(task);
4860 } else {
4861 cmn_err(CE_PANIC, "LU is done with the task but LPORT "
4862 " is not done, itask %p itask_flags %x",
4863 (void *)itask, itask->itask_flags);
4864 }
4865 }
4866 }
4867
4868 void
4869 stmf_task_lu_done(scsi_task_t *task)
4870 {
4871 stmf_i_scsi_task_t *itask =
4872 (stmf_i_scsi_task_t *)task->task_stmf_private;
4873 stmf_worker_t *w = itask->itask_worker;
4874 uint32_t new, old;
4875
4876 mutex_enter(&w->worker_lock);
4877 do {
4878 new = old = itask->itask_flags;
4879 if (old & ITASK_BEING_ABORTED) {
4880 mutex_exit(&w->worker_lock);
4881 return;
4882 }
4883 if (old & ITASK_IN_WORKER_QUEUE) {
4884 cmn_err(CE_PANIC, "task_lu_done received"
4885 " when task is in worker queue "
4886 " task = %p", (void *)task);
4887 }
4888 new &= ~ITASK_KNOWN_TO_LU;
4889 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4890
4891 mutex_exit(&w->worker_lock);
4892
4893 if ((itask->itask_flags & (ITASK_KNOWN_TO_LU |
4894 ITASK_KNOWN_TO_TGT_PORT | ITASK_IN_WORKER_QUEUE |
4895 ITASK_BEING_ABORTED)) == 0) {
4896 stmf_task_free(task);
4897 } else {
4898 cmn_err(CE_PANIC, "stmf_lu_done should be the last stage but "
4899 " the task is still not done, task = %p", (void *)task);
4900 }
4901 }
4902
4903 void
4904 stmf_queue_task_for_abort(scsi_task_t *task, stmf_status_t s)
4905 {
4906 stmf_i_scsi_task_t *itask =
4907 (stmf_i_scsi_task_t *)task->task_stmf_private;
4908 stmf_worker_t *w;
4909 uint32_t old, new;
4910
4911 stmf_task_audit(itask, TE_TASK_ABORT, CMD_OR_IOF_NA, NULL);
4912
4913 do {
4914 old = new = itask->itask_flags;
4915 if ((old & ITASK_BEING_ABORTED) ||
4916 ((old & (ITASK_KNOWN_TO_TGT_PORT |
4917 ITASK_KNOWN_TO_LU)) == 0)) {
4918 return;
4919 }
4920 new |= ITASK_BEING_ABORTED;
4921 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4922 task->task_completion_status = s;
4923 itask->itask_start_time = ddi_get_lbolt();
4924
4925 if (((w = itask->itask_worker) == NULL) ||
4926 (itask->itask_flags & ITASK_IN_TRANSITION)) {
4927 return;
4928 }
4929
4930 /* Queue it and get out */
4931 mutex_enter(&w->worker_lock);
4932 if (itask->itask_flags & ITASK_IN_WORKER_QUEUE) {
4933 mutex_exit(&w->worker_lock);
4934 return;
4935 }
4936 atomic_or_32(&itask->itask_flags, ITASK_IN_WORKER_QUEUE);
4937 itask->itask_worker_next = NULL;
4938 if (w->worker_task_tail) {
4939 w->worker_task_tail->itask_worker_next = itask;
4940 } else {
4941 w->worker_task_head = itask;
4942 }
4943 w->worker_task_tail = itask;
4944 if (++(w->worker_queue_depth) > w->worker_max_qdepth_pu) {
4945 w->worker_max_qdepth_pu = w->worker_queue_depth;
4946 }
4947 if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0)
4948 cv_signal(&w->worker_cv);
4949 mutex_exit(&w->worker_lock);
4950 }
4951
4952 void
4953 stmf_abort(int abort_cmd, scsi_task_t *task, stmf_status_t s, void *arg)
4954 {
4955 stmf_i_scsi_task_t *itask = NULL;
4956 uint32_t old, new, f, rf;
4957
4958 DTRACE_PROBE2(scsi__task__abort, scsi_task_t *, task,
4959 stmf_status_t, s);
4960
4961 switch (abort_cmd) {
4962 case STMF_QUEUE_ABORT_LU:
4963 stmf_task_lu_killall((stmf_lu_t *)arg, task, s);
4964 return;
4965 case STMF_QUEUE_TASK_ABORT:
4966 stmf_queue_task_for_abort(task, s);
4967 return;
4968 case STMF_REQUEUE_TASK_ABORT_LPORT:
4969 rf = ITASK_TGT_PORT_ABORT_CALLED;
4970 f = ITASK_KNOWN_TO_TGT_PORT;
4971 break;
4972 case STMF_REQUEUE_TASK_ABORT_LU:
4973 rf = ITASK_LU_ABORT_CALLED;
4974 f = ITASK_KNOWN_TO_LU;
4975 break;
4976 default:
4977 return;
4978 }
4979 itask = (stmf_i_scsi_task_t *)task->task_stmf_private;
4980 f |= ITASK_BEING_ABORTED | rf;
4981 do {
4982 old = new = itask->itask_flags;
4983 if ((old & f) != f) {
4984 return;
4985 }
4986 new &= ~rf;
4987 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4988 }
4989
4990 void
4991 stmf_task_lu_aborted(scsi_task_t *task, stmf_status_t s, uint32_t iof)
4992 {
4993 char info[STMF_CHANGE_INFO_LEN];
4994 stmf_i_scsi_task_t *itask = TASK_TO_ITASK(task);
4995 unsigned long long st;
4996
4997 stmf_task_audit(itask, TE_TASK_LU_ABORTED, iof, NULL);
4998
4999 st = s; /* gcc fix */
5000 if ((s != STMF_ABORT_SUCCESS) && (s != STMF_NOT_FOUND)) {
5001 (void) snprintf(info, sizeof (info),
5002 "task %p, lu failed to abort ret=%llx", (void *)task, st);
5003 } else if ((iof & STMF_IOF_LU_DONE) == 0) {
5004 (void) snprintf(info, sizeof (info),
5005 "Task aborted but LU is not finished, task ="
5006 "%p, s=%llx, iof=%x", (void *)task, st, iof);
5007 } else {
5008 /*
5009 * LU abort successfully
5010 */
5011 atomic_and_32(&itask->itask_flags, ~ITASK_KNOWN_TO_LU);
5012 return;
5013 }
5014
5015 stmf_abort_task_offline(task, 1, info);
5016 }
5017
5018 void
5019 stmf_task_lport_aborted(scsi_task_t *task, stmf_status_t s, uint32_t iof)
5020 {
5021 char info[STMF_CHANGE_INFO_LEN];
5022 stmf_i_scsi_task_t *itask = TASK_TO_ITASK(task);
5023 unsigned long long st;
5024 uint32_t old, new;
5025
5026 stmf_task_audit(itask, TE_TASK_LPORT_ABORTED, iof, NULL);
5027
5028 st = s;
5029 if ((s != STMF_ABORT_SUCCESS) && (s != STMF_NOT_FOUND)) {
5030 (void) snprintf(info, sizeof (info),
5031 "task %p, tgt port failed to abort ret=%llx", (void *)task,
5032 st);
5033 } else if ((iof & STMF_IOF_LPORT_DONE) == 0) {
5034 (void) snprintf(info, sizeof (info),
5035 "Task aborted but tgt port is not finished, "
5036 "task=%p, s=%llx, iof=%x", (void *)task, st, iof);
5037 } else {
5038 /*
5039 * LPORT abort successfully
5040 */
5041 do {
5042 old = new = itask->itask_flags;
5043 if (!(old & ITASK_KNOWN_TO_TGT_PORT))
5044 return;
5045 new &= ~ITASK_KNOWN_TO_TGT_PORT;
5046 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
5047 return;
5048 }
5049
5050 stmf_abort_task_offline(task, 0, info);
5051 }
5052
5053 stmf_status_t
5054 stmf_task_poll_lu(scsi_task_t *task, uint32_t timeout)
5055 {
5056 stmf_i_scsi_task_t *itask = (stmf_i_scsi_task_t *)
5057 task->task_stmf_private;
5058 stmf_worker_t *w = itask->itask_worker;
5059 int i;
5060
5061 ASSERT(itask->itask_flags & ITASK_KNOWN_TO_LU);
5062 mutex_enter(&w->worker_lock);
5063 if (itask->itask_ncmds >= ITASK_MAX_NCMDS) {
5064 mutex_exit(&w->worker_lock);
5065 return (STMF_BUSY);
5066 }
5067 for (i = 0; i < itask->itask_ncmds; i++) {
5068 if (itask->itask_cmd_stack[i] == ITASK_CMD_POLL_LU) {
5069 mutex_exit(&w->worker_lock);
5070 return (STMF_SUCCESS);
5071 }
5072 }
5073 itask->itask_cmd_stack[itask->itask_ncmds++] = ITASK_CMD_POLL_LU;
5074 if (timeout == ITASK_DEFAULT_POLL_TIMEOUT) {
5075 itask->itask_poll_timeout = ddi_get_lbolt() + 1;
5076 } else {
5077 clock_t t = drv_usectohz(timeout * 1000);
5078 if (t == 0)
5079 t = 1;
5080 itask->itask_poll_timeout = ddi_get_lbolt() + t;
5081 }
5082 if ((itask->itask_flags & ITASK_IN_WORKER_QUEUE) == 0) {
5083 itask->itask_worker_next = NULL;
5084 if (w->worker_task_tail) {
5085 w->worker_task_tail->itask_worker_next = itask;
5086 } else {
5087 w->worker_task_head = itask;
5088 }
5089 w->worker_task_tail = itask;
5090 if (++(w->worker_queue_depth) > w->worker_max_qdepth_pu) {
5091 w->worker_max_qdepth_pu = w->worker_queue_depth;
5092 }
5093 atomic_or_32(&itask->itask_flags, ITASK_IN_WORKER_QUEUE);
5094 if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0)
5095 cv_signal(&w->worker_cv);
5096 }
5097 mutex_exit(&w->worker_lock);
5098 return (STMF_SUCCESS);
5099 }
5100
5101 stmf_status_t
5102 stmf_task_poll_lport(scsi_task_t *task, uint32_t timeout)
5103 {
5104 stmf_i_scsi_task_t *itask = (stmf_i_scsi_task_t *)
5105 task->task_stmf_private;
5106 stmf_worker_t *w = itask->itask_worker;
5107 int i;
5108
5109 ASSERT(itask->itask_flags & ITASK_KNOWN_TO_TGT_PORT);
5110 mutex_enter(&w->worker_lock);
5111 if (itask->itask_ncmds >= ITASK_MAX_NCMDS) {
5112 mutex_exit(&w->worker_lock);
5113 return (STMF_BUSY);
5114 }
5115 for (i = 0; i < itask->itask_ncmds; i++) {
5116 if (itask->itask_cmd_stack[i] == ITASK_CMD_POLL_LPORT) {
5117 mutex_exit(&w->worker_lock);
5118 return (STMF_SUCCESS);
5119 }
5120 }
5121 itask->itask_cmd_stack[itask->itask_ncmds++] = ITASK_CMD_POLL_LPORT;
5122 if (timeout == ITASK_DEFAULT_POLL_TIMEOUT) {
5123 itask->itask_poll_timeout = ddi_get_lbolt() + 1;
5124 } else {
5125 clock_t t = drv_usectohz(timeout * 1000);
5126 if (t == 0)
5127 t = 1;
5128 itask->itask_poll_timeout = ddi_get_lbolt() + t;
5129 }
5130 if ((itask->itask_flags & ITASK_IN_WORKER_QUEUE) == 0) {
5131 itask->itask_worker_next = NULL;
5132 if (w->worker_task_tail) {
5133 w->worker_task_tail->itask_worker_next = itask;
5134 } else {
5135 w->worker_task_head = itask;
5136 }
5137 w->worker_task_tail = itask;
5138 if (++(w->worker_queue_depth) > w->worker_max_qdepth_pu) {
5139 w->worker_max_qdepth_pu = w->worker_queue_depth;
5140 }
5141 if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0)
5142 cv_signal(&w->worker_cv);
5143 }
5144 mutex_exit(&w->worker_lock);
5145 return (STMF_SUCCESS);
5146 }
5147
5148 void
5149 stmf_do_task_abort(scsi_task_t *task)
5150 {
5151 stmf_i_scsi_task_t *itask = TASK_TO_ITASK(task);
5152 stmf_lu_t *lu;
5153 stmf_local_port_t *lport;
5154 unsigned long long ret;
5155 uint32_t old, new;
5156 uint8_t call_lu_abort, call_port_abort;
5157 char info[STMF_CHANGE_INFO_LEN];
5158
5159 lu = task->task_lu;
5160 lport = task->task_lport;
5161 do {
5162 old = new = itask->itask_flags;
5163 if ((old & (ITASK_KNOWN_TO_LU | ITASK_LU_ABORT_CALLED)) ==
5164 ITASK_KNOWN_TO_LU) {
5165 new |= ITASK_LU_ABORT_CALLED;
5166 call_lu_abort = 1;
5167 } else {
5168 call_lu_abort = 0;
5169 }
5170 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
5171
5172 if (call_lu_abort) {
5173 if ((itask->itask_flags & ITASK_DEFAULT_HANDLING) == 0) {
5174 ret = lu->lu_abort(lu, STMF_LU_ABORT_TASK, task, 0);
5175 } else {
5176 ret = dlun0->lu_abort(lu, STMF_LU_ABORT_TASK, task, 0);
5177 }
5178 if ((ret == STMF_ABORT_SUCCESS) || (ret == STMF_NOT_FOUND)) {
5179 stmf_task_lu_aborted(task, ret, STMF_IOF_LU_DONE);
5180 } else if (ret == STMF_BUSY) {
5181 atomic_and_32(&itask->itask_flags,
5182 ~ITASK_LU_ABORT_CALLED);
5183 } else if (ret != STMF_SUCCESS) {
5184 (void) snprintf(info, sizeof (info),
5185 "Abort failed by LU %p, ret %llx", (void *)lu, ret);
5186 stmf_abort_task_offline(task, 1, info);
5187 }
5188 } else if (itask->itask_flags & ITASK_KNOWN_TO_LU) {
5189 if (ddi_get_lbolt() > (itask->itask_start_time +
5190 STMF_SEC2TICK(lu->lu_abort_timeout?
5191 lu->lu_abort_timeout : ITASK_DEFAULT_ABORT_TIMEOUT))) {
5192 (void) snprintf(info, sizeof (info),
5193 "lu abort timed out");
5194 stmf_abort_task_offline(itask->itask_task, 1, info);
5195 }
5196 }
5197
5198 do {
5199 old = new = itask->itask_flags;
5200 if ((old & (ITASK_KNOWN_TO_TGT_PORT |
5201 ITASK_TGT_PORT_ABORT_CALLED)) == ITASK_KNOWN_TO_TGT_PORT) {
5202 new |= ITASK_TGT_PORT_ABORT_CALLED;
5203 call_port_abort = 1;
5204 } else {
5205 call_port_abort = 0;
5206 }
5207 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
5208 if (call_port_abort) {
5209 ret = lport->lport_abort(lport, STMF_LPORT_ABORT_TASK, task, 0);
5210 if ((ret == STMF_ABORT_SUCCESS) || (ret == STMF_NOT_FOUND)) {
5211 stmf_task_lport_aborted(task, ret, STMF_IOF_LPORT_DONE);
5212 } else if (ret == STMF_BUSY) {
5213 atomic_and_32(&itask->itask_flags,
5214 ~ITASK_TGT_PORT_ABORT_CALLED);
5215 } else if (ret != STMF_SUCCESS) {
5216 (void) snprintf(info, sizeof (info),
5217 "Abort failed by tgt port %p ret %llx",
5218 (void *)lport, ret);
5219 stmf_abort_task_offline(task, 0, info);
5220 }
5221 } else if (itask->itask_flags & ITASK_KNOWN_TO_TGT_PORT) {
5222 if (ddi_get_lbolt() > (itask->itask_start_time +
5223 STMF_SEC2TICK(lport->lport_abort_timeout?
5224 lport->lport_abort_timeout :
5225 ITASK_DEFAULT_ABORT_TIMEOUT))) {
5226 (void) snprintf(info, sizeof (info),
5227 "lport abort timed out");
5228 stmf_abort_task_offline(itask->itask_task, 0, info);
5229 }
5230 }
5231 }
5232
5233 stmf_status_t
5234 stmf_ctl(int cmd, void *obj, void *arg)
5235 {
5236 stmf_status_t ret;
5237 stmf_i_lu_t *ilu;
5238 stmf_i_local_port_t *ilport;
5239 stmf_state_change_info_t *ssci = (stmf_state_change_info_t *)arg;
5240
5241 mutex_enter(&stmf_state.stmf_lock);
5242 ret = STMF_INVALID_ARG;
5243 if (cmd & STMF_CMD_LU_OP) {
5244 ilu = stmf_lookup_lu((stmf_lu_t *)obj);
5245 if (ilu == NULL) {
5246 goto stmf_ctl_lock_exit;
5247 }
5248 DTRACE_PROBE3(lu__state__change,
5249 stmf_lu_t *, ilu->ilu_lu,
5250 int, cmd, stmf_state_change_info_t *, ssci);
5251 } else if (cmd & STMF_CMD_LPORT_OP) {
5252 ilport = stmf_lookup_lport((stmf_local_port_t *)obj);
5253 if (ilport == NULL) {
5254 goto stmf_ctl_lock_exit;
5255 }
5256 DTRACE_PROBE3(lport__state__change,
5257 stmf_local_port_t *, ilport->ilport_lport,
5258 int, cmd, stmf_state_change_info_t *, ssci);
5259 } else {
5260 goto stmf_ctl_lock_exit;
5261 }
5262
5263 switch (cmd) {
5264 case STMF_CMD_LU_ONLINE:
5265 switch (ilu->ilu_state) {
5266 case STMF_STATE_OFFLINE:
5267 ret = STMF_SUCCESS;
5268 break;
5269 case STMF_STATE_ONLINE:
5270 case STMF_STATE_ONLINING:
5271 ret = STMF_ALREADY;
5272 break;
5273 case STMF_STATE_OFFLINING:
5274 ret = STMF_BUSY;
5275 break;
5276 default:
5277 ret = STMF_BADSTATE;
5278 break;
5279 }
5280 if (ret != STMF_SUCCESS)
5281 goto stmf_ctl_lock_exit;
5282
5283 ilu->ilu_state = STMF_STATE_ONLINING;
5284 mutex_exit(&stmf_state.stmf_lock);
5285 stmf_svc_queue(cmd, obj, (stmf_state_change_info_t *)arg);
5286 break;
5287
5288 case STMF_CMD_LU_ONLINE_COMPLETE:
5289 if (ilu->ilu_state != STMF_STATE_ONLINING) {
5290 ret = STMF_BADSTATE;
5291 goto stmf_ctl_lock_exit;
5292 }
5293 if (((stmf_change_status_t *)arg)->st_completion_status ==
5294 STMF_SUCCESS) {
5295 ilu->ilu_state = STMF_STATE_ONLINE;
5296 mutex_exit(&stmf_state.stmf_lock);
5297 ((stmf_lu_t *)obj)->lu_ctl((stmf_lu_t *)obj,
5298 STMF_ACK_LU_ONLINE_COMPLETE, arg);
5299 mutex_enter(&stmf_state.stmf_lock);
5300 stmf_add_lu_to_active_sessions((stmf_lu_t *)obj);
5301 } else {
5302 /* XXX: should throw a meesage an record more data */
5303 ilu->ilu_state = STMF_STATE_OFFLINE;
5304 }
5305 ret = STMF_SUCCESS;
5306 goto stmf_ctl_lock_exit;
5307
5308 case STMF_CMD_LU_OFFLINE:
5309 switch (ilu->ilu_state) {
5310 case STMF_STATE_ONLINE:
5311 ret = STMF_SUCCESS;
5312 break;
5313 case STMF_STATE_OFFLINE:
5314 case STMF_STATE_OFFLINING:
5315 ret = STMF_ALREADY;
5316 break;
5317 case STMF_STATE_ONLINING:
5318 ret = STMF_BUSY;
5319 break;
5320 default:
5321 ret = STMF_BADSTATE;
5322 break;
5323 }
5324 if (ret != STMF_SUCCESS)
5325 goto stmf_ctl_lock_exit;
5326 ilu->ilu_state = STMF_STATE_OFFLINING;
5327 mutex_exit(&stmf_state.stmf_lock);
5328 stmf_svc_queue(cmd, obj, (stmf_state_change_info_t *)arg);
5329 break;
5330
5331 case STMF_CMD_LU_OFFLINE_COMPLETE:
5332 if (ilu->ilu_state != STMF_STATE_OFFLINING) {
5333 ret = STMF_BADSTATE;
5334 goto stmf_ctl_lock_exit;
5335 }
5336 if (((stmf_change_status_t *)arg)->st_completion_status ==
5337 STMF_SUCCESS) {
5338 ilu->ilu_state = STMF_STATE_OFFLINE;
5339 mutex_exit(&stmf_state.stmf_lock);
5340 ((stmf_lu_t *)obj)->lu_ctl((stmf_lu_t *)obj,
5341 STMF_ACK_LU_OFFLINE_COMPLETE, arg);
5342 mutex_enter(&stmf_state.stmf_lock);
5343 } else {
5344 ilu->ilu_state = STMF_STATE_ONLINE;
5345 stmf_add_lu_to_active_sessions((stmf_lu_t *)obj);
5346 }
5347 mutex_exit(&stmf_state.stmf_lock);
5348 break;
5349
5350 /*
5351 * LPORT_ONLINE/OFFLINE has nothing to do with link offline/online.
5352 * It's related with hardware disable/enable.
5353 */
5354 case STMF_CMD_LPORT_ONLINE:
5355 switch (ilport->ilport_state) {
5356 case STMF_STATE_OFFLINE:
5357 ret = STMF_SUCCESS;
5358 break;
5359 case STMF_STATE_ONLINE:
5360 case STMF_STATE_ONLINING:
5361 ret = STMF_ALREADY;
5362 break;
5363 case STMF_STATE_OFFLINING:
5364 ret = STMF_BUSY;
5365 break;
5366 default:
5367 ret = STMF_BADSTATE;
5368 break;
5369 }
5370 if (ret != STMF_SUCCESS)
5371 goto stmf_ctl_lock_exit;
5372
5373 /*
5374 * Only user request can recover the port from the
5375 * FORCED_OFFLINE state
5376 */
5377 if (ilport->ilport_flags & ILPORT_FORCED_OFFLINE) {
5378 if (!(ssci->st_rflags & STMF_RFLAG_USER_REQUEST)) {
5379 ret = STMF_FAILURE;
5380 goto stmf_ctl_lock_exit;
5381 }
5382 }
5383
5384 /*
5385 * Avoid too frequent request to online
5386 */
5387 if (ssci->st_rflags & STMF_RFLAG_USER_REQUEST) {
5388 ilport->ilport_online_times = 0;
5389 ilport->ilport_avg_interval = 0;
5390 }
5391 if ((ilport->ilport_avg_interval < STMF_AVG_ONLINE_INTERVAL) &&
5392 (ilport->ilport_online_times >= 4)) {
5393 ret = STMF_FAILURE;
5394 ilport->ilport_flags |= ILPORT_FORCED_OFFLINE;
5395 stmf_trace(NULL, "stmf_ctl: too frequent request to "
5396 "online the port");
5397 cmn_err(CE_WARN, "stmf_ctl: too frequent request to "
5398 "online the port, set FORCED_OFFLINE now");
5399 goto stmf_ctl_lock_exit;
5400 }
5401 if (ilport->ilport_online_times > 0) {
5402 if (ilport->ilport_online_times == 1) {
5403 ilport->ilport_avg_interval = ddi_get_lbolt() -
5404 ilport->ilport_last_online_clock;
5405 } else {
5406 ilport->ilport_avg_interval =
5407 (ilport->ilport_avg_interval +
5408 ddi_get_lbolt() -
5409 ilport->ilport_last_online_clock) >> 1;
5410 }
5411 }
5412 ilport->ilport_last_online_clock = ddi_get_lbolt();
5413 ilport->ilport_online_times++;
5414
5415 /*
5416 * Submit online service request
5417 */
5418 ilport->ilport_flags &= ~ILPORT_FORCED_OFFLINE;
5419 ilport->ilport_state = STMF_STATE_ONLINING;
5420 mutex_exit(&stmf_state.stmf_lock);
5421 stmf_svc_queue(cmd, obj, (stmf_state_change_info_t *)arg);
5422 break;
5423
5424 case STMF_CMD_LPORT_ONLINE_COMPLETE:
5425 if (ilport->ilport_state != STMF_STATE_ONLINING) {
5426 ret = STMF_BADSTATE;
5427 goto stmf_ctl_lock_exit;
5428 }
5429 if (((stmf_change_status_t *)arg)->st_completion_status ==
5430 STMF_SUCCESS) {
5431 ilport->ilport_state = STMF_STATE_ONLINE;
5432 mutex_exit(&stmf_state.stmf_lock);
5433 ((stmf_local_port_t *)obj)->lport_ctl(
5434 (stmf_local_port_t *)obj,
5435 STMF_ACK_LPORT_ONLINE_COMPLETE, arg);
5436 mutex_enter(&stmf_state.stmf_lock);
5437 } else {
5438 ilport->ilport_state = STMF_STATE_OFFLINE;
5439 }
5440 ret = STMF_SUCCESS;
5441 goto stmf_ctl_lock_exit;
5442
5443 case STMF_CMD_LPORT_OFFLINE:
5444 switch (ilport->ilport_state) {
5445 case STMF_STATE_ONLINE:
5446 ret = STMF_SUCCESS;
5447 break;
5448 case STMF_STATE_OFFLINE:
5449 case STMF_STATE_OFFLINING:
5450 ret = STMF_ALREADY;
5451 break;
5452 case STMF_STATE_ONLINING:
5453 ret = STMF_BUSY;
5454 break;
5455 default:
5456 ret = STMF_BADSTATE;
5457 break;
5458 }
5459 if (ret != STMF_SUCCESS)
5460 goto stmf_ctl_lock_exit;
5461
5462 ilport->ilport_state = STMF_STATE_OFFLINING;
5463 mutex_exit(&stmf_state.stmf_lock);
5464 stmf_svc_queue(cmd, obj, (stmf_state_change_info_t *)arg);
5465 break;
5466
5467 case STMF_CMD_LPORT_OFFLINE_COMPLETE:
5468 if (ilport->ilport_state != STMF_STATE_OFFLINING) {
5469 ret = STMF_BADSTATE;
5470 goto stmf_ctl_lock_exit;
5471 }
5472 if (((stmf_change_status_t *)arg)->st_completion_status ==
5473 STMF_SUCCESS) {
5474 ilport->ilport_state = STMF_STATE_OFFLINE;
5475 mutex_exit(&stmf_state.stmf_lock);
5476 ((stmf_local_port_t *)obj)->lport_ctl(
5477 (stmf_local_port_t *)obj,
5478 STMF_ACK_LPORT_OFFLINE_COMPLETE, arg);
5479 mutex_enter(&stmf_state.stmf_lock);
5480 } else {
5481 ilport->ilport_state = STMF_STATE_ONLINE;
5482 }
5483 mutex_exit(&stmf_state.stmf_lock);
5484 break;
5485
5486 default:
5487 cmn_err(CE_WARN, "Invalid ctl cmd received %x", cmd);
5488 ret = STMF_INVALID_ARG;
5489 goto stmf_ctl_lock_exit;
5490 }
5491
5492 return (STMF_SUCCESS);
5493
5494 stmf_ctl_lock_exit:;
5495 mutex_exit(&stmf_state.stmf_lock);
5496 return (ret);
5497 }
5498
5499 /* ARGSUSED */
5500 stmf_status_t
5501 stmf_info_impl(uint32_t cmd, void *arg1, void *arg2, uint8_t *buf,
5502 uint32_t *bufsizep)
5503 {
5504 return (STMF_NOT_SUPPORTED);
5505 }
5506
5507 /* ARGSUSED */
5508 stmf_status_t
5509 stmf_info(uint32_t cmd, void *arg1, void *arg2, uint8_t *buf,
5510 uint32_t *bufsizep)
5511 {
5512 uint32_t cl = SI_GET_CLASS(cmd);
5513
5514 if (cl == SI_STMF) {
5515 return (stmf_info_impl(cmd, arg1, arg2, buf, bufsizep));
5516 }
5517 if (cl == SI_LPORT) {
5518 return (((stmf_local_port_t *)arg1)->lport_info(cmd, arg1,
5519 arg2, buf, bufsizep));
5520 } else if (cl == SI_LU) {
5521 return (((stmf_lu_t *)arg1)->lu_info(cmd, arg1, arg2, buf,
5522 bufsizep));
5523 }
5524
5525 return (STMF_NOT_SUPPORTED);
5526 }
5527
5528 /*
5529 * Used by port providers. pwwn is 8 byte wwn, sdid is the devid used by
5530 * stmf to register local ports. The ident should have 20 bytes in buffer
5531 * space to convert the wwn to "wwn.xxxxxxxxxxxxxxxx" string.
5532 */
5533 void
5534 stmf_wwn_to_devid_desc(scsi_devid_desc_t *sdid, uint8_t *wwn,
5535 uint8_t protocol_id)
5536 {
5537 char wwn_str[20+1];
5538
5539 sdid->protocol_id = protocol_id;
5540 sdid->piv = 1;
5541 sdid->code_set = CODE_SET_ASCII;
5542 sdid->association = ID_IS_TARGET_PORT;
5543 sdid->ident_length = 20;
5544 /* Convert wwn value to "wwn.XXXXXXXXXXXXXXXX" format */
5545 (void) snprintf(wwn_str, sizeof (wwn_str),
5546 "wwn.%02X%02X%02X%02X%02X%02X%02X%02X",
5547 wwn[0], wwn[1], wwn[2], wwn[3], wwn[4], wwn[5], wwn[6], wwn[7]);
5548 bcopy(wwn_str, (char *)sdid->ident, 20);
5549 }
5550
5551
5552 stmf_xfer_data_t *
5553 stmf_prepare_tpgs_data(uint8_t ilu_alua)
5554 {
5555 stmf_xfer_data_t *xd;
5556 stmf_i_local_port_t *ilport;
5557 uint8_t *p;
5558 uint32_t sz, asz, nports = 0, nports_standby = 0;
5559
5560 mutex_enter(&stmf_state.stmf_lock);
5561 /* check if any ports are standby and create second group */
5562 for (ilport = stmf_state.stmf_ilportlist; ilport;
5563 ilport = ilport->ilport_next) {
5564 if (ilport->ilport_standby == 1) {
5565 nports_standby++;
5566 } else {
5567 nports++;
5568 }
5569 }
5570
5571 /* The spec only allows for 255 ports to be reported per group */
5572 nports = min(nports, 255);
5573 nports_standby = min(nports_standby, 255);
5574 sz = (nports * 4) + 12;
5575 if (nports_standby && ilu_alua) {
5576 sz += (nports_standby * 4) + 8;
5577 }
5578 asz = sz + sizeof (*xd) - 4;
5579 xd = (stmf_xfer_data_t *)kmem_zalloc(asz, KM_NOSLEEP);
5580 if (xd == NULL) {
5581 mutex_exit(&stmf_state.stmf_lock);
5582 return (NULL);
5583 }
5584 xd->alloc_size = asz;
5585 xd->size_left = sz;
5586
5587 p = xd->buf;
5588
5589 *((uint32_t *)p) = BE_32(sz - 4);
5590 p += 4;
5591 p[0] = 0x80; /* PREF */
5592 p[1] = 5; /* AO_SUP, S_SUP */
5593 if (stmf_state.stmf_alua_node == 1) {
5594 p[3] = 1; /* Group 1 */
5595 } else {
5596 p[3] = 0; /* Group 0 */
5597 }
5598 p[7] = nports & 0xff;
5599 p += 8;
5600 for (ilport = stmf_state.stmf_ilportlist; ilport;
5601 ilport = ilport->ilport_next) {
5602 if (ilport->ilport_standby == 1) {
5603 continue;
5604 }
5605 ((uint16_t *)p)[1] = BE_16(ilport->ilport_rtpid);
5606 p += 4;
5607 }
5608 if (nports_standby && ilu_alua) {
5609 p[0] = 0x02; /* Non PREF, Standby */
5610 p[1] = 5; /* AO_SUP, S_SUP */
5611 if (stmf_state.stmf_alua_node == 1) {
5612 p[3] = 0; /* Group 0 */
5613 } else {
5614 p[3] = 1; /* Group 1 */
5615 }
5616 p[7] = nports_standby & 0xff;
5617 p += 8;
5618 for (ilport = stmf_state.stmf_ilportlist; ilport;
5619 ilport = ilport->ilport_next) {
5620 if (ilport->ilport_standby == 0) {
5621 continue;
5622 }
5623 ((uint16_t *)p)[1] = BE_16(ilport->ilport_rtpid);
5624 p += 4;
5625 }
5626 }
5627
5628 mutex_exit(&stmf_state.stmf_lock);
5629
5630 return (xd);
5631 }
5632
5633 struct scsi_devid_desc *
5634 stmf_scsilib_get_devid_desc(uint16_t rtpid)
5635 {
5636 scsi_devid_desc_t *devid = NULL;
5637 stmf_i_local_port_t *ilport;
5638
5639 mutex_enter(&stmf_state.stmf_lock);
5640
5641 for (ilport = stmf_state.stmf_ilportlist; ilport;
5642 ilport = ilport->ilport_next) {
5643 if (ilport->ilport_rtpid == rtpid) {
5644 scsi_devid_desc_t *id = ilport->ilport_lport->lport_id;
5645 uint32_t id_sz = sizeof (scsi_devid_desc_t) +
5646 id->ident_length;
5647 devid = (scsi_devid_desc_t *)kmem_zalloc(id_sz,
5648 KM_NOSLEEP);
5649 if (devid != NULL) {
5650 bcopy(id, devid, id_sz);
5651 }
5652 break;
5653 }
5654 }
5655
5656 mutex_exit(&stmf_state.stmf_lock);
5657 return (devid);
5658 }
5659
5660 uint16_t
5661 stmf_scsilib_get_lport_rtid(struct scsi_devid_desc *devid)
5662 {
5663 stmf_i_local_port_t *ilport;
5664 scsi_devid_desc_t *id;
5665 uint16_t rtpid = 0;
5666
5667 mutex_enter(&stmf_state.stmf_lock);
5668 for (ilport = stmf_state.stmf_ilportlist; ilport;
5669 ilport = ilport->ilport_next) {
5670 id = ilport->ilport_lport->lport_id;
5671 if ((devid->ident_length == id->ident_length) &&
5672 (memcmp(devid->ident, id->ident, id->ident_length) == 0)) {
5673 rtpid = ilport->ilport_rtpid;
5674 break;
5675 }
5676 }
5677 mutex_exit(&stmf_state.stmf_lock);
5678 return (rtpid);
5679 }
5680
5681 static uint16_t stmf_lu_id_gen_number = 0;
5682
5683 stmf_status_t
5684 stmf_scsilib_uniq_lu_id(uint32_t company_id, scsi_devid_desc_t *lu_id)
5685 {
5686 return (stmf_scsilib_uniq_lu_id2(company_id, 0, lu_id));
5687 }
5688
5689 stmf_status_t
5690 stmf_scsilib_uniq_lu_id2(uint32_t company_id, uint32_t host_id,
5691 scsi_devid_desc_t *lu_id)
5692 {
5693 uint8_t *p;
5694 struct timeval32 timestamp32;
5695 uint32_t *t = (uint32_t *)&timestamp32;
5696 struct ether_addr mac;
5697 uint8_t *e = (uint8_t *)&mac;
5698 int hid = (int)host_id;
5699 uint16_t gen_number;
5700
5701 if (company_id == COMPANY_ID_NONE)
5702 company_id = COMPANY_ID_SUN;
5703
5704 if (lu_id->ident_length != 0x10)
5705 return (STMF_INVALID_ARG);
5706
5707 p = (uint8_t *)lu_id;
5708
5709 gen_number = atomic_inc_16_nv(&stmf_lu_id_gen_number);
5710
5711 p[0] = 0xf1; p[1] = 3; p[2] = 0; p[3] = 0x10;
5712 p[4] = ((company_id >> 20) & 0xf) | 0x60;
5713 p[5] = (company_id >> 12) & 0xff;
5714 p[6] = (company_id >> 4) & 0xff;
5715 p[7] = (company_id << 4) & 0xf0;
5716 if (hid == 0 && !localetheraddr((struct ether_addr *)NULL, &mac)) {
5717 hid = BE_32((int)zone_get_hostid(NULL));
5718 }
5719 if (hid != 0) {
5720 e[0] = (hid >> 24) & 0xff;
5721 e[1] = (hid >> 16) & 0xff;
5722 e[2] = (hid >> 8) & 0xff;
5723 e[3] = hid & 0xff;
5724 e[4] = e[5] = 0;
5725 }
5726 bcopy(e, p+8, 6);
5727 uniqtime32(&timestamp32);
5728 *t = BE_32(*t);
5729 bcopy(t, p+14, 4);
5730 p[18] = (gen_number >> 8) & 0xff;
5731 p[19] = gen_number & 0xff;
5732
5733 return (STMF_SUCCESS);
5734 }
5735
5736 /*
5737 * saa is sense key, ASC, ASCQ
5738 */
5739 void
5740 stmf_scsilib_send_status(scsi_task_t *task, uint8_t st, uint32_t saa)
5741 {
5742 uint8_t sd[18];
5743 task->task_scsi_status = st;
5744 if (st == 2) {
5745 bzero(sd, 18);
5746 sd[0] = 0x70;
5747 sd[2] = (saa >> 16) & 0xf;
5748 sd[7] = 10;
5749 sd[12] = (saa >> 8) & 0xff;
5750 sd[13] = saa & 0xff;
5751 task->task_sense_data = sd;
5752 task->task_sense_length = 18;
5753 } else {
5754 task->task_sense_data = NULL;
5755 task->task_sense_length = 0;
5756 }
5757 (void) stmf_send_scsi_status(task, STMF_IOF_LU_DONE);
5758 }
5759
5760 uint32_t
5761 stmf_scsilib_prepare_vpd_page83(scsi_task_t *task, uint8_t *page,
5762 uint32_t page_len, uint8_t byte0, uint32_t vpd_mask)
5763 {
5764 uint8_t *p = NULL;
5765 uint8_t small_buf[32];
5766 uint32_t sz = 0;
5767 uint32_t n = 4;
5768 uint32_t m = 0;
5769 uint32_t last_bit = 0;
5770
5771 if (page_len < 4)
5772 return (0);
5773 if (page_len > 65535)
5774 page_len = 65535;
5775
5776 page[0] = byte0;
5777 page[1] = 0x83;
5778
5779 /* CONSTCOND */
5780 while (1) {
5781 m += sz;
5782 if (sz && (page_len > n)) {
5783 uint32_t copysz;
5784 copysz = page_len > (n + sz) ? sz : page_len - n;
5785 bcopy(p, page + n, copysz);
5786 n += copysz;
5787 }
5788 vpd_mask &= ~last_bit;
5789 if (vpd_mask == 0)
5790 break;
5791
5792 if (vpd_mask & STMF_VPD_LU_ID) {
5793 last_bit = STMF_VPD_LU_ID;
5794 sz = task->task_lu->lu_id->ident_length + 4;
5795 p = (uint8_t *)task->task_lu->lu_id;
5796 continue;
5797 } else if (vpd_mask & STMF_VPD_TARGET_ID) {
5798 last_bit = STMF_VPD_TARGET_ID;
5799 sz = task->task_lport->lport_id->ident_length + 4;
5800 p = (uint8_t *)task->task_lport->lport_id;
5801 continue;
5802 } else if (vpd_mask & STMF_VPD_TP_GROUP) {
5803 stmf_i_local_port_t *ilport;
5804 last_bit = STMF_VPD_TP_GROUP;
5805 p = small_buf;
5806 bzero(p, 8);
5807 p[0] = 1;
5808 p[1] = 0x15;
5809 p[3] = 4;
5810 ilport = (stmf_i_local_port_t *)
5811 task->task_lport->lport_stmf_private;
5812 /*
5813 * If we're in alua mode, group 1 contains all alua
5814 * participating ports and all standby ports
5815 * > 255. Otherwise, if we're in alua mode, any local
5816 * ports (non standby/pppt) are also in group 1 if the
5817 * alua node is 1. Otherwise the group is 0.
5818 */
5819 if ((stmf_state.stmf_alua_state &&
5820 (ilport->ilport_alua || ilport->ilport_standby) &&
5821 ilport->ilport_rtpid > 255) ||
5822 (stmf_state.stmf_alua_node == 1 &&
5823 ilport->ilport_standby != 1)) {
5824 p[7] = 1; /* Group 1 */
5825 }
5826 sz = 8;
5827 continue;
5828 } else if (vpd_mask & STMF_VPD_RELATIVE_TP_ID) {
5829 stmf_i_local_port_t *ilport;
5830
5831 last_bit = STMF_VPD_RELATIVE_TP_ID;
5832 p = small_buf;
5833 bzero(p, 8);
5834 p[0] = 1;
5835 p[1] = 0x14;
5836 p[3] = 4;
5837 ilport = (stmf_i_local_port_t *)
5838 task->task_lport->lport_stmf_private;
5839 p[6] = (ilport->ilport_rtpid >> 8) & 0xff;
5840 p[7] = ilport->ilport_rtpid & 0xff;
5841 sz = 8;
5842 continue;
5843 } else {
5844 cmn_err(CE_WARN, "Invalid vpd_mask");
5845 break;
5846 }
5847 }
5848
5849 page[2] = (m >> 8) & 0xff;
5850 page[3] = m & 0xff;
5851
5852 return (n);
5853 }
5854
5855 void
5856 stmf_scsilib_handle_report_tpgs(scsi_task_t *task, stmf_data_buf_t *dbuf)
5857 {
5858 stmf_i_scsi_task_t *itask =
5859 (stmf_i_scsi_task_t *)task->task_stmf_private;
5860 stmf_i_lu_t *ilu =
5861 (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
5862 stmf_xfer_data_t *xd;
5863 uint32_t sz, minsz;
5864
5865 itask->itask_flags |= ITASK_DEFAULT_HANDLING;
5866 task->task_cmd_xfer_length =
5867 ((((uint32_t)task->task_cdb[6]) << 24) |
5868 (((uint32_t)task->task_cdb[7]) << 16) |
5869 (((uint32_t)task->task_cdb[8]) << 8) |
5870 ((uint32_t)task->task_cdb[9]));
5871
5872 if (task->task_additional_flags &
5873 TASK_AF_NO_EXPECTED_XFER_LENGTH) {
5874 task->task_expected_xfer_length =
5875 task->task_cmd_xfer_length;
5876 }
5877
5878 if (task->task_cmd_xfer_length == 0) {
5879 stmf_scsilib_send_status(task, STATUS_GOOD, 0);
5880 return;
5881 }
5882 if (task->task_cmd_xfer_length < 4) {
5883 stmf_scsilib_send_status(task, STATUS_CHECK,
5884 STMF_SAA_INVALID_FIELD_IN_CDB);
5885 return;
5886 }
5887
5888 sz = min(task->task_expected_xfer_length,
5889 task->task_cmd_xfer_length);
5890
5891 xd = stmf_prepare_tpgs_data(ilu->ilu_alua);
5892
5893 if (xd == NULL) {
5894 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
5895 STMF_ALLOC_FAILURE, NULL);
5896 return;
5897 }
5898
5899 sz = min(sz, xd->size_left);
5900 xd->size_left = sz;
5901 minsz = min(512, sz);
5902
5903 if (dbuf == NULL)
5904 dbuf = stmf_alloc_dbuf(task, sz, &minsz, 0);
5905 if (dbuf == NULL) {
5906 kmem_free(xd, xd->alloc_size);
5907 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
5908 STMF_ALLOC_FAILURE, NULL);
5909 return;
5910 }
5911 dbuf->db_lu_private = xd;
5912 stmf_xd_to_dbuf(dbuf, 1);
5913
5914 dbuf->db_flags = DB_DIRECTION_TO_RPORT;
5915 (void) stmf_xfer_data(task, dbuf, 0);
5916
5917 }
5918
5919 void
5920 stmf_scsilib_handle_task_mgmt(scsi_task_t *task)
5921 {
5922
5923 switch (task->task_mgmt_function) {
5924 /*
5925 * For now we will abort all I/Os on the LU in case of ABORT_TASK_SET
5926 * and ABORT_TASK. But unlike LUN_RESET we will not reset LU state
5927 * in these cases. This needs to be changed to abort only the required
5928 * set.
5929 */
5930 case TM_ABORT_TASK:
5931 case TM_ABORT_TASK_SET:
5932 case TM_CLEAR_TASK_SET:
5933 case TM_LUN_RESET:
5934 stmf_handle_lun_reset(task);
5935 /* issue the reset to the proxy node as well */
5936 if (stmf_state.stmf_alua_state == 1) {
5937 (void) stmf_proxy_scsi_cmd(task, NULL);
5938 }
5939 return;
5940 case TM_TARGET_RESET:
5941 case TM_TARGET_COLD_RESET:
5942 case TM_TARGET_WARM_RESET:
5943 stmf_handle_target_reset(task);
5944 return;
5945 default:
5946 /* We dont support this task mgmt function */
5947 stmf_scsilib_send_status(task, STATUS_CHECK,
5948 STMF_SAA_INVALID_FIELD_IN_CMD_IU);
5949 return;
5950 }
5951 }
5952
5953 void
5954 stmf_handle_lun_reset(scsi_task_t *task)
5955 {
5956 stmf_i_scsi_task_t *itask;
5957 stmf_i_lu_t *ilu;
5958
5959 itask = (stmf_i_scsi_task_t *)task->task_stmf_private;
5960 ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
5961
5962 /*
5963 * To sync with target reset, grab this lock. The LU is not going
5964 * anywhere as there is atleast one task pending (this task).
5965 */
5966 mutex_enter(&stmf_state.stmf_lock);
5967
5968 if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
5969 mutex_exit(&stmf_state.stmf_lock);
5970 stmf_scsilib_send_status(task, STATUS_CHECK,
5971 STMF_SAA_OPERATION_IN_PROGRESS);
5972 return;
5973 }
5974 atomic_or_32(&ilu->ilu_flags, ILU_RESET_ACTIVE);
5975 mutex_exit(&stmf_state.stmf_lock);
5976
5977 /*
5978 * Mark this task as the one causing LU reset so that we know who
5979 * was responsible for setting the ILU_RESET_ACTIVE. In case this
5980 * task itself gets aborted, we will clear ILU_RESET_ACTIVE.
5981 */
5982 itask->itask_flags |= ITASK_DEFAULT_HANDLING | ITASK_CAUSING_LU_RESET;
5983
5984 /* Initiatiate abort on all commands on this LU except this one */
5985 stmf_abort(STMF_QUEUE_ABORT_LU, task, STMF_ABORTED, task->task_lu);
5986
5987 /* Start polling on this task */
5988 if (stmf_task_poll_lu(task, ITASK_DEFAULT_POLL_TIMEOUT)
5989 != STMF_SUCCESS) {
5990 stmf_abort(STMF_QUEUE_TASK_ABORT, task, STMF_ALLOC_FAILURE,
5991 NULL);
5992 return;
5993 }
5994 }
5995
5996 void
5997 stmf_handle_target_reset(scsi_task_t *task)
5998 {
5999 stmf_i_scsi_task_t *itask;
6000 stmf_i_lu_t *ilu;
6001 stmf_i_scsi_session_t *iss;
6002 stmf_lun_map_t *lm;
6003 stmf_lun_map_ent_t *lm_ent;
6004 int i, lf;
6005
6006 itask = (stmf_i_scsi_task_t *)task->task_stmf_private;
6007 iss = (stmf_i_scsi_session_t *)task->task_session->ss_stmf_private;
6008 ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
6009
6010 /*
6011 * To sync with LUN reset, grab this lock. The session is not going
6012 * anywhere as there is atleast one task pending (this task).
6013 */
6014 mutex_enter(&stmf_state.stmf_lock);
6015
6016 /* Grab the session lock as a writer to prevent any changes in it */
6017 rw_enter(iss->iss_lockp, RW_WRITER);
6018
6019 if (iss->iss_flags & ISS_RESET_ACTIVE) {
6020 rw_exit(iss->iss_lockp);
6021 mutex_exit(&stmf_state.stmf_lock);
6022 stmf_scsilib_send_status(task, STATUS_CHECK,
6023 STMF_SAA_OPERATION_IN_PROGRESS);
6024 return;
6025 }
6026 atomic_or_32(&iss->iss_flags, ISS_RESET_ACTIVE);
6027
6028 /*
6029 * Now go through each LUN in this session and make sure all of them
6030 * can be reset.
6031 */
6032 lm = iss->iss_sm;
6033 for (i = 0, lf = 0; i < lm->lm_nentries; i++) {
6034 if (lm->lm_plus[i] == NULL)
6035 continue;
6036 lf++;
6037 lm_ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
6038 ilu = (stmf_i_lu_t *)(lm_ent->ent_lu->lu_stmf_private);
6039 if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
6040 atomic_and_32(&iss->iss_flags, ~ISS_RESET_ACTIVE);
6041 rw_exit(iss->iss_lockp);
6042 mutex_exit(&stmf_state.stmf_lock);
6043 stmf_scsilib_send_status(task, STATUS_CHECK,
6044 STMF_SAA_OPERATION_IN_PROGRESS);
6045 return;
6046 }
6047 }
6048 if (lf == 0) {
6049 /* No luns in this session */
6050 atomic_and_32(&iss->iss_flags, ~ISS_RESET_ACTIVE);
6051 rw_exit(iss->iss_lockp);
6052 mutex_exit(&stmf_state.stmf_lock);
6053 stmf_scsilib_send_status(task, STATUS_GOOD, 0);
6054 return;
6055 }
6056
6057 /* ok, start the damage */
6058 itask->itask_flags |= ITASK_DEFAULT_HANDLING |
6059 ITASK_CAUSING_TARGET_RESET;
6060 for (i = 0; i < lm->lm_nentries; i++) {
6061 if (lm->lm_plus[i] == NULL)
6062 continue;
6063 lm_ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
6064 ilu = (stmf_i_lu_t *)(lm_ent->ent_lu->lu_stmf_private);
6065 atomic_or_32(&ilu->ilu_flags, ILU_RESET_ACTIVE);
6066 }
6067
6068 for (i = 0; i < lm->lm_nentries; i++) {
6069 if (lm->lm_plus[i] == NULL)
6070 continue;
6071 lm_ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
6072 stmf_abort(STMF_QUEUE_ABORT_LU, task, STMF_ABORTED,
6073 lm_ent->ent_lu);
6074 }
6075
6076 rw_exit(iss->iss_lockp);
6077 mutex_exit(&stmf_state.stmf_lock);
6078
6079 /* Start polling on this task */
6080 if (stmf_task_poll_lu(task, ITASK_DEFAULT_POLL_TIMEOUT)
6081 != STMF_SUCCESS) {
6082 stmf_abort(STMF_QUEUE_TASK_ABORT, task, STMF_ALLOC_FAILURE,
6083 NULL);
6084 return;
6085 }
6086 }
6087
6088 int
6089 stmf_handle_cmd_during_ic(stmf_i_scsi_task_t *itask)
6090 {
6091 scsi_task_t *task = itask->itask_task;
6092 stmf_i_scsi_session_t *iss = (stmf_i_scsi_session_t *)
6093 task->task_session->ss_stmf_private;
6094
6095 rw_enter(iss->iss_lockp, RW_WRITER);
6096 if (((iss->iss_flags & ISS_LUN_INVENTORY_CHANGED) == 0) ||
6097 (task->task_cdb[0] == SCMD_INQUIRY)) {
6098 rw_exit(iss->iss_lockp);
6099 return (0);
6100 }
6101 atomic_and_32(&iss->iss_flags,
6102 ~(ISS_LUN_INVENTORY_CHANGED | ISS_GOT_INITIAL_LUNS));
6103 rw_exit(iss->iss_lockp);
6104
6105 if (task->task_cdb[0] == SCMD_REPORT_LUNS) {
6106 return (0);
6107 }
6108 stmf_scsilib_send_status(task, STATUS_CHECK,
6109 STMF_SAA_REPORT_LUN_DATA_HAS_CHANGED);
6110 return (1);
6111 }
6112
6113 void
6114 stmf_worker_init()
6115 {
6116 uint32_t i;
6117
6118 /* Make local copy of global tunables */
6119 stmf_i_max_nworkers = stmf_max_nworkers;
6120 stmf_i_min_nworkers = stmf_min_nworkers;
6121
6122 ASSERT(stmf_workers == NULL);
6123 if (stmf_i_min_nworkers < 4) {
6124 stmf_i_min_nworkers = 4;
6125 }
6126 if (stmf_i_max_nworkers < stmf_i_min_nworkers) {
6127 stmf_i_max_nworkers = stmf_i_min_nworkers;
6128 }
6129 stmf_workers = (stmf_worker_t *)kmem_zalloc(
6130 sizeof (stmf_worker_t) * stmf_i_max_nworkers, KM_SLEEP);
6131 for (i = 0; i < stmf_i_max_nworkers; i++) {
6132 stmf_worker_t *w = &stmf_workers[i];
6133 mutex_init(&w->worker_lock, NULL, MUTEX_DRIVER, NULL);
6134 cv_init(&w->worker_cv, NULL, CV_DRIVER, NULL);
6135 }
6136 stmf_worker_mgmt_delay = drv_usectohz(20 * 1000);
6137 stmf_workers_state = STMF_WORKERS_ENABLED;
6138
6139 /* Workers will be started by stmf_worker_mgmt() */
6140
6141 /* Lets wait for atleast one worker to start */
6142 while (stmf_nworkers_cur == 0)
6143 delay(drv_usectohz(20 * 1000));
6144 stmf_worker_mgmt_delay = drv_usectohz(3 * 1000 * 1000);
6145 }
6146
6147 stmf_status_t
6148 stmf_worker_fini()
6149 {
6150 int i;
6151 clock_t sb;
6152
6153 if (stmf_workers_state == STMF_WORKERS_DISABLED)
6154 return (STMF_SUCCESS);
6155 ASSERT(stmf_workers);
6156 stmf_workers_state = STMF_WORKERS_DISABLED;
6157 stmf_worker_mgmt_delay = drv_usectohz(20 * 1000);
6158 cv_signal(&stmf_state.stmf_cv);
6159
6160 sb = ddi_get_lbolt() + drv_usectohz(10 * 1000 * 1000);
6161 /* Wait for all the threads to die */
6162 while (stmf_nworkers_cur != 0) {
6163 if (ddi_get_lbolt() > sb) {
6164 stmf_workers_state = STMF_WORKERS_ENABLED;
6165 return (STMF_BUSY);
6166 }
6167 delay(drv_usectohz(100 * 1000));
6168 }
6169 for (i = 0; i < stmf_i_max_nworkers; i++) {
6170 stmf_worker_t *w = &stmf_workers[i];
6171 mutex_destroy(&w->worker_lock);
6172 cv_destroy(&w->worker_cv);
6173 }
6174 kmem_free(stmf_workers, sizeof (stmf_worker_t) * stmf_i_max_nworkers);
6175 stmf_workers = NULL;
6176
6177 return (STMF_SUCCESS);
6178 }
6179
6180 void
6181 stmf_worker_task(void *arg)
6182 {
6183 stmf_worker_t *w;
6184 stmf_i_scsi_session_t *iss;
6185 scsi_task_t *task;
6186 stmf_i_scsi_task_t *itask;
6187 stmf_data_buf_t *dbuf;
6188 stmf_lu_t *lu;
6189 clock_t wait_timer = 0;
6190 clock_t wait_ticks, wait_delta = 0;
6191 uint32_t old, new;
6192 uint8_t curcmd;
6193 uint8_t abort_free;
6194 uint8_t wait_queue;
6195 uint8_t dec_qdepth;
6196
6197 w = (stmf_worker_t *)arg;
6198 wait_ticks = drv_usectohz(10000);
6199
6200 DTRACE_PROBE1(worker__create, stmf_worker_t, w);
6201 mutex_enter(&w->worker_lock);
6202 w->worker_flags |= STMF_WORKER_STARTED | STMF_WORKER_ACTIVE;
6203 stmf_worker_loop:;
6204 if ((w->worker_ref_count == 0) &&
6205 (w->worker_flags & STMF_WORKER_TERMINATE)) {
6206 w->worker_flags &= ~(STMF_WORKER_STARTED |
6207 STMF_WORKER_ACTIVE | STMF_WORKER_TERMINATE);
6208 w->worker_tid = NULL;
6209 mutex_exit(&w->worker_lock);
6210 DTRACE_PROBE1(worker__destroy, stmf_worker_t, w);
6211 thread_exit();
6212 }
6213 /* CONSTCOND */
6214 while (1) {
6215 dec_qdepth = 0;
6216 if (wait_timer && (ddi_get_lbolt() >= wait_timer)) {
6217 wait_timer = 0;
6218 wait_delta = 0;
6219 if (w->worker_wait_head) {
6220 ASSERT(w->worker_wait_tail);
6221 if (w->worker_task_head == NULL)
6222 w->worker_task_head =
6223 w->worker_wait_head;
6224 else
6225 w->worker_task_tail->itask_worker_next =
6226 w->worker_wait_head;
6227 w->worker_task_tail = w->worker_wait_tail;
6228 w->worker_wait_head = w->worker_wait_tail =
6229 NULL;
6230 }
6231 }
6232 if ((itask = w->worker_task_head) == NULL) {
6233 break;
6234 }
6235 task = itask->itask_task;
6236 DTRACE_PROBE2(worker__active, stmf_worker_t, w,
6237 scsi_task_t *, task);
6238 w->worker_task_head = itask->itask_worker_next;
6239 if (w->worker_task_head == NULL)
6240 w->worker_task_tail = NULL;
6241
6242 wait_queue = 0;
6243 abort_free = 0;
6244 if (itask->itask_ncmds > 0) {
6245 curcmd = itask->itask_cmd_stack[itask->itask_ncmds - 1];
6246 } else {
6247 ASSERT(itask->itask_flags & ITASK_BEING_ABORTED);
6248 }
6249 do {
6250 old = itask->itask_flags;
6251 if (old & ITASK_BEING_ABORTED) {
6252 itask->itask_ncmds = 1;
6253 curcmd = itask->itask_cmd_stack[0] =
6254 ITASK_CMD_ABORT;
6255 goto out_itask_flag_loop;
6256 } else if ((curcmd & ITASK_CMD_MASK) ==
6257 ITASK_CMD_NEW_TASK) {
6258 /*
6259 * set ITASK_KSTAT_IN_RUNQ, this flag
6260 * will not reset until task completed
6261 */
6262 new = old | ITASK_KNOWN_TO_LU |
6263 ITASK_KSTAT_IN_RUNQ;
6264 } else {
6265 goto out_itask_flag_loop;
6266 }
6267 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
6268
6269 out_itask_flag_loop:
6270
6271 /*
6272 * Decide if this task needs to go to a queue and/or if
6273 * we can decrement the itask_cmd_stack.
6274 */
6275 if (curcmd == ITASK_CMD_ABORT) {
6276 if (itask->itask_flags & (ITASK_KNOWN_TO_LU |
6277 ITASK_KNOWN_TO_TGT_PORT)) {
6278 wait_queue = 1;
6279 } else {
6280 abort_free = 1;
6281 }
6282 } else if ((curcmd & ITASK_CMD_POLL) &&
6283 (itask->itask_poll_timeout > ddi_get_lbolt())) {
6284 wait_queue = 1;
6285 }
6286
6287 if (wait_queue) {
6288 itask->itask_worker_next = NULL;
6289 if (w->worker_wait_tail) {
6290 w->worker_wait_tail->itask_worker_next = itask;
6291 } else {
6292 w->worker_wait_head = itask;
6293 }
6294 w->worker_wait_tail = itask;
6295 if (wait_timer == 0) {
6296 wait_timer = ddi_get_lbolt() + wait_ticks;
6297 wait_delta = wait_ticks;
6298 }
6299 } else if ((--(itask->itask_ncmds)) != 0) {
6300 itask->itask_worker_next = NULL;
6301 if (w->worker_task_tail) {
6302 w->worker_task_tail->itask_worker_next = itask;
6303 } else {
6304 w->worker_task_head = itask;
6305 }
6306 w->worker_task_tail = itask;
6307 } else {
6308 atomic_and_32(&itask->itask_flags,
6309 ~ITASK_IN_WORKER_QUEUE);
6310 /*
6311 * This is where the queue depth should go down by
6312 * one but we delay that on purpose to account for
6313 * the call into the provider. The actual decrement
6314 * happens after the worker has done its job.
6315 */
6316 dec_qdepth = 1;
6317 itask->itask_waitq_time +=
6318 gethrtime() - itask->itask_waitq_enter_timestamp;
6319 }
6320
6321 /* We made it here means we are going to call LU */
6322 if ((itask->itask_flags & ITASK_DEFAULT_HANDLING) == 0)
6323 lu = task->task_lu;
6324 else
6325 lu = dlun0;
6326 dbuf = itask->itask_dbufs[ITASK_CMD_BUF_NDX(curcmd)];
6327 mutex_exit(&w->worker_lock);
6328 curcmd &= ITASK_CMD_MASK;
6329 stmf_task_audit(itask, TE_PROCESS_CMD, curcmd, dbuf);
6330 switch (curcmd) {
6331 case ITASK_CMD_NEW_TASK:
6332 iss = (stmf_i_scsi_session_t *)
6333 task->task_session->ss_stmf_private;
6334 stmf_itl_lu_new_task(itask);
6335 if (iss->iss_flags & ISS_LUN_INVENTORY_CHANGED) {
6336 if (stmf_handle_cmd_during_ic(itask))
6337 break;
6338 }
6339 #ifdef DEBUG
6340 if (stmf_drop_task_counter > 0) {
6341 if (atomic_dec_32_nv(&stmf_drop_task_counter)
6342 == 1)
6343 break;
6344 }
6345 #endif
6346 DTRACE_PROBE1(scsi__task__start, scsi_task_t *, task);
6347 lu->lu_new_task(task, dbuf);
6348 break;
6349 case ITASK_CMD_DATA_XFER_DONE:
6350 lu->lu_dbuf_xfer_done(task, dbuf);
6351 break;
6352 case ITASK_CMD_STATUS_DONE:
6353 lu->lu_send_status_done(task);
6354 break;
6355 case ITASK_CMD_ABORT:
6356 if (abort_free) {
6357 stmf_task_free(task);
6358 } else {
6359 stmf_do_task_abort(task);
6360 }
6361 break;
6362 case ITASK_CMD_POLL_LU:
6363 if (!wait_queue) {
6364 lu->lu_task_poll(task);
6365 }
6366 break;
6367 case ITASK_CMD_POLL_LPORT:
6368 if (!wait_queue)
6369 task->task_lport->lport_task_poll(task);
6370 break;
6371 case ITASK_CMD_SEND_STATUS:
6372 /* case ITASK_CMD_XFER_DATA: */
6373 break;
6374 }
6375 mutex_enter(&w->worker_lock);
6376 if (dec_qdepth) {
6377 w->worker_queue_depth--;
6378 }
6379 }
6380 if ((w->worker_flags & STMF_WORKER_TERMINATE) && (wait_timer == 0)) {
6381 if (w->worker_ref_count == 0)
6382 goto stmf_worker_loop;
6383 else {
6384 wait_timer = ddi_get_lbolt() + 1;
6385 wait_delta = 1;
6386 }
6387 }
6388 w->worker_flags &= ~STMF_WORKER_ACTIVE;
6389 if (wait_timer) {
6390 DTRACE_PROBE1(worker__timed__sleep, stmf_worker_t, w);
6391 (void) cv_reltimedwait(&w->worker_cv, &w->worker_lock,
6392 wait_delta, TR_CLOCK_TICK);
6393 } else {
6394 DTRACE_PROBE1(worker__sleep, stmf_worker_t, w);
6395 cv_wait(&w->worker_cv, &w->worker_lock);
6396 }
6397 DTRACE_PROBE1(worker__wakeup, stmf_worker_t, w);
6398 w->worker_flags |= STMF_WORKER_ACTIVE;
6399 goto stmf_worker_loop;
6400 }
6401
6402 void
6403 stmf_worker_mgmt()
6404 {
6405 int i;
6406 int workers_needed;
6407 uint32_t qd;
6408 clock_t tps, d = 0;
6409 uint32_t cur_max_ntasks = 0;
6410 stmf_worker_t *w;
6411
6412 /* Check if we are trying to increase the # of threads */
6413 for (i = stmf_nworkers_cur; i < stmf_nworkers_needed; i++) {
6414 if (stmf_workers[i].worker_flags & STMF_WORKER_STARTED) {
6415 stmf_nworkers_cur++;
6416 stmf_nworkers_accepting_cmds++;
6417 } else {
6418 /* Wait for transition to complete */
6419 return;
6420 }
6421 }
6422 /* Check if we are trying to decrease the # of workers */
6423 for (i = (stmf_nworkers_cur - 1); i >= stmf_nworkers_needed; i--) {
6424 if ((stmf_workers[i].worker_flags & STMF_WORKER_STARTED) == 0) {
6425 stmf_nworkers_cur--;
6426 /*
6427 * stmf_nworkers_accepting_cmds has already been
6428 * updated by the request to reduce the # of workers.
6429 */
6430 } else {
6431 /* Wait for transition to complete */
6432 return;
6433 }
6434 }
6435 /* Check if we are being asked to quit */
6436 if (stmf_workers_state != STMF_WORKERS_ENABLED) {
6437 if (stmf_nworkers_cur) {
6438 workers_needed = 0;
6439 goto worker_mgmt_trigger_change;
6440 }
6441 return;
6442 }
6443 /* Check if we are starting */
6444 if (stmf_nworkers_cur < stmf_i_min_nworkers) {
6445 workers_needed = stmf_i_min_nworkers;
6446 goto worker_mgmt_trigger_change;
6447 }
6448
6449 tps = drv_usectohz(1 * 1000 * 1000);
6450 if ((stmf_wm_last != 0) &&
6451 ((d = ddi_get_lbolt() - stmf_wm_last) > tps)) {
6452 qd = 0;
6453 for (i = 0; i < stmf_nworkers_accepting_cmds; i++) {
6454 qd += stmf_workers[i].worker_max_qdepth_pu;
6455 stmf_workers[i].worker_max_qdepth_pu = 0;
6456 if (stmf_workers[i].worker_max_sys_qdepth_pu >
6457 cur_max_ntasks) {
6458 cur_max_ntasks =
6459 stmf_workers[i].worker_max_sys_qdepth_pu;
6460 }
6461 stmf_workers[i].worker_max_sys_qdepth_pu = 0;
6462 }
6463 }
6464 stmf_wm_last = ddi_get_lbolt();
6465 if (d <= tps) {
6466 /* still ramping up */
6467 return;
6468 }
6469 /* max qdepth cannot be more than max tasks */
6470 if (qd > cur_max_ntasks)
6471 qd = cur_max_ntasks;
6472
6473 /* See if we have more workers */
6474 if (qd < stmf_nworkers_accepting_cmds) {
6475 /*
6476 * Since we dont reduce the worker count right away, monitor
6477 * the highest load during the scale_down_delay.
6478 */
6479 if (qd > stmf_worker_scale_down_qd)
6480 stmf_worker_scale_down_qd = qd;
6481 if (stmf_worker_scale_down_timer == 0) {
6482 stmf_worker_scale_down_timer = ddi_get_lbolt() +
6483 drv_usectohz(stmf_worker_scale_down_delay *
6484 1000 * 1000);
6485 return;
6486 }
6487 if (ddi_get_lbolt() < stmf_worker_scale_down_timer) {
6488 return;
6489 }
6490 /* Its time to reduce the workers */
6491 if (stmf_worker_scale_down_qd < stmf_i_min_nworkers)
6492 stmf_worker_scale_down_qd = stmf_i_min_nworkers;
6493 if (stmf_worker_scale_down_qd > stmf_i_max_nworkers)
6494 stmf_worker_scale_down_qd = stmf_i_max_nworkers;
6495 if (stmf_worker_scale_down_qd == stmf_nworkers_cur)
6496 return;
6497 workers_needed = stmf_worker_scale_down_qd;
6498 stmf_worker_scale_down_qd = 0;
6499 goto worker_mgmt_trigger_change;
6500 }
6501 stmf_worker_scale_down_qd = 0;
6502 stmf_worker_scale_down_timer = 0;
6503 if (qd > stmf_i_max_nworkers)
6504 qd = stmf_i_max_nworkers;
6505 if (qd < stmf_i_min_nworkers)
6506 qd = stmf_i_min_nworkers;
6507 if (qd == stmf_nworkers_cur)
6508 return;
6509 workers_needed = qd;
6510 goto worker_mgmt_trigger_change;
6511
6512 /* NOTREACHED */
6513 return;
6514
6515 worker_mgmt_trigger_change:
6516 ASSERT(workers_needed != stmf_nworkers_cur);
6517 if (workers_needed > stmf_nworkers_cur) {
6518 stmf_nworkers_needed = workers_needed;
6519 for (i = stmf_nworkers_cur; i < workers_needed; i++) {
6520 w = &stmf_workers[i];
6521 w->worker_tid = thread_create(NULL, 0, stmf_worker_task,
6522 (void *)&stmf_workers[i], 0, &p0, TS_RUN,
6523 minclsyspri);
6524 }
6525 return;
6526 }
6527 /* At this point we know that we are decreasing the # of workers */
6528 stmf_nworkers_accepting_cmds = workers_needed;
6529 stmf_nworkers_needed = workers_needed;
6530 /* Signal the workers that its time to quit */
6531 for (i = (stmf_nworkers_cur - 1); i >= stmf_nworkers_needed; i--) {
6532 w = &stmf_workers[i];
6533 ASSERT(w && (w->worker_flags & STMF_WORKER_STARTED));
6534 mutex_enter(&w->worker_lock);
6535 w->worker_flags |= STMF_WORKER_TERMINATE;
6536 if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0)
6537 cv_signal(&w->worker_cv);
6538 mutex_exit(&w->worker_lock);
6539 }
6540 }
6541
6542 /*
6543 * Fills out a dbuf from stmf_xfer_data_t (contained in the db_lu_private).
6544 * If all the data has been filled out, frees the xd and makes
6545 * db_lu_private NULL.
6546 */
6547 void
6548 stmf_xd_to_dbuf(stmf_data_buf_t *dbuf, int set_rel_off)
6549 {
6550 stmf_xfer_data_t *xd;
6551 uint8_t *p;
6552 int i;
6553 uint32_t s;
6554
6555 xd = (stmf_xfer_data_t *)dbuf->db_lu_private;
6556 dbuf->db_data_size = 0;
6557 if (set_rel_off)
6558 dbuf->db_relative_offset = xd->size_done;
6559 for (i = 0; i < dbuf->db_sglist_length; i++) {
6560 s = min(xd->size_left, dbuf->db_sglist[i].seg_length);
6561 p = &xd->buf[xd->size_done];
6562 bcopy(p, dbuf->db_sglist[i].seg_addr, s);
6563 xd->size_left -= s;
6564 xd->size_done += s;
6565 dbuf->db_data_size += s;
6566 if (xd->size_left == 0) {
6567 kmem_free(xd, xd->alloc_size);
6568 dbuf->db_lu_private = NULL;
6569 return;
6570 }
6571 }
6572 }
6573
6574 /* ARGSUSED */
6575 stmf_status_t
6576 stmf_dlun0_task_alloc(scsi_task_t *task)
6577 {
6578 return (STMF_SUCCESS);
6579 }
6580
6581 void
6582 stmf_dlun0_new_task(scsi_task_t *task, stmf_data_buf_t *dbuf)
6583 {
6584 uint8_t *cdbp = (uint8_t *)&task->task_cdb[0];
6585 stmf_i_scsi_session_t *iss;
6586 uint32_t sz, minsz;
6587 uint8_t *p;
6588 stmf_xfer_data_t *xd;
6589 uint8_t inq_page_length = 31;
6590
6591 if (task->task_mgmt_function) {
6592 stmf_scsilib_handle_task_mgmt(task);
6593 return;
6594 }
6595
6596 switch (cdbp[0]) {
6597 case SCMD_INQUIRY:
6598 /*
6599 * Basic protocol checks. In addition, only reply to
6600 * standard inquiry. Otherwise, the LU provider needs
6601 * to respond.
6602 */
6603
6604 if (cdbp[2] || (cdbp[1] & 1) || cdbp[5]) {
6605 stmf_scsilib_send_status(task, STATUS_CHECK,
6606 STMF_SAA_INVALID_FIELD_IN_CDB);
6607 return;
6608 }
6609
6610 task->task_cmd_xfer_length =
6611 (((uint32_t)cdbp[3]) << 8) | cdbp[4];
6612
6613 if (task->task_additional_flags &
6614 TASK_AF_NO_EXPECTED_XFER_LENGTH) {
6615 task->task_expected_xfer_length =
6616 task->task_cmd_xfer_length;
6617 }
6618
6619 sz = min(task->task_expected_xfer_length,
6620 min(36, task->task_cmd_xfer_length));
6621 minsz = 36;
6622
6623 if (sz == 0) {
6624 stmf_scsilib_send_status(task, STATUS_GOOD, 0);
6625 return;
6626 }
6627
6628 if (dbuf && (dbuf->db_sglist[0].seg_length < 36)) {
6629 /*
6630 * Ignore any preallocated dbuf if the size is less
6631 * than 36. It will be freed during the task_free.
6632 */
6633 dbuf = NULL;
6634 }
6635 if (dbuf == NULL)
6636 dbuf = stmf_alloc_dbuf(task, minsz, &minsz, 0);
6637 if ((dbuf == NULL) || (dbuf->db_sglist[0].seg_length < sz)) {
6638 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
6639 STMF_ALLOC_FAILURE, NULL);
6640 return;
6641 }
6642 dbuf->db_lu_private = NULL;
6643
6644 p = dbuf->db_sglist[0].seg_addr;
6645
6646 /*
6647 * Standard inquiry handling only.
6648 */
6649
6650 bzero(p, inq_page_length + 5);
6651
6652 p[0] = DPQ_SUPPORTED | DTYPE_UNKNOWN;
6653 p[2] = 5;
6654 p[3] = 0x12;
6655 p[4] = inq_page_length;
6656 p[6] = 0x80;
6657
6658 (void) strncpy((char *)p+8, "SUN ", 8);
6659 (void) strncpy((char *)p+16, "COMSTAR ", 16);
6660 (void) strncpy((char *)p+32, "1.0 ", 4);
6661
6662 dbuf->db_data_size = sz;
6663 dbuf->db_relative_offset = 0;
6664 dbuf->db_flags = DB_DIRECTION_TO_RPORT;
6665 (void) stmf_xfer_data(task, dbuf, 0);
6666
6667 return;
6668
6669 case SCMD_REPORT_LUNS:
6670 task->task_cmd_xfer_length =
6671 ((((uint32_t)task->task_cdb[6]) << 24) |
6672 (((uint32_t)task->task_cdb[7]) << 16) |
6673 (((uint32_t)task->task_cdb[8]) << 8) |
6674 ((uint32_t)task->task_cdb[9]));
6675
6676 if (task->task_additional_flags &
6677 TASK_AF_NO_EXPECTED_XFER_LENGTH) {
6678 task->task_expected_xfer_length =
6679 task->task_cmd_xfer_length;
6680 }
6681
6682 sz = min(task->task_expected_xfer_length,
6683 task->task_cmd_xfer_length);
6684
6685 if (sz < 16) {
6686 stmf_scsilib_send_status(task, STATUS_CHECK,
6687 STMF_SAA_INVALID_FIELD_IN_CDB);
6688 return;
6689 }
6690
6691 iss = (stmf_i_scsi_session_t *)
6692 task->task_session->ss_stmf_private;
6693 rw_enter(iss->iss_lockp, RW_WRITER);
6694 xd = stmf_session_prepare_report_lun_data(iss->iss_sm);
6695 rw_exit(iss->iss_lockp);
6696
6697 if (xd == NULL) {
6698 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
6699 STMF_ALLOC_FAILURE, NULL);
6700 return;
6701 }
6702
6703 sz = min(sz, xd->size_left);
6704 xd->size_left = sz;
6705 minsz = min(512, sz);
6706
6707 if (dbuf == NULL)
6708 dbuf = stmf_alloc_dbuf(task, sz, &minsz, 0);
6709 if (dbuf == NULL) {
6710 kmem_free(xd, xd->alloc_size);
6711 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
6712 STMF_ALLOC_FAILURE, NULL);
6713 return;
6714 }
6715 dbuf->db_lu_private = xd;
6716 stmf_xd_to_dbuf(dbuf, 1);
6717
6718 atomic_and_32(&iss->iss_flags,
6719 ~(ISS_LUN_INVENTORY_CHANGED | ISS_GOT_INITIAL_LUNS));
6720 dbuf->db_flags = DB_DIRECTION_TO_RPORT;
6721 (void) stmf_xfer_data(task, dbuf, 0);
6722 return;
6723 }
6724
6725 stmf_scsilib_send_status(task, STATUS_CHECK, STMF_SAA_INVALID_OPCODE);
6726 }
6727
6728 void
6729 stmf_dlun0_dbuf_done(scsi_task_t *task, stmf_data_buf_t *dbuf)
6730 {
6731 stmf_i_scsi_task_t *itask =
6732 (stmf_i_scsi_task_t *)task->task_stmf_private;
6733
6734 if (dbuf->db_xfer_status != STMF_SUCCESS) {
6735 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
6736 dbuf->db_xfer_status, NULL);
6737 return;
6738 }
6739 task->task_nbytes_transferred += dbuf->db_data_size;
6740 if (dbuf->db_lu_private) {
6741 /* There is more */
6742 stmf_xd_to_dbuf(dbuf, 1);
6743 (void) stmf_xfer_data(task, dbuf, 0);
6744 return;
6745 }
6746
6747 stmf_free_dbuf(task, dbuf);
6748 /*
6749 * If this is a proxy task, it will need to be completed from the
6750 * proxy port provider. This message lets pppt know that the xfer
6751 * is complete. When we receive the status from pppt, we will
6752 * then relay that status back to the lport.
6753 */
6754 if (itask->itask_flags & ITASK_PROXY_TASK) {
6755 stmf_ic_msg_t *ic_xfer_done_msg = NULL;
6756 stmf_status_t ic_ret = STMF_FAILURE;
6757 uint64_t session_msg_id;
6758 mutex_enter(&stmf_state.stmf_lock);
6759 session_msg_id = stmf_proxy_msg_id++;
6760 mutex_exit(&stmf_state.stmf_lock);
6761 /* send xfer done status to pppt */
6762 ic_xfer_done_msg = ic_scsi_data_xfer_done_msg_alloc(
6763 itask->itask_proxy_msg_id,
6764 task->task_session->ss_session_id,
6765 STMF_SUCCESS, session_msg_id);
6766 if (ic_xfer_done_msg) {
6767 ic_ret = ic_tx_msg(ic_xfer_done_msg);
6768 if (ic_ret != STMF_IC_MSG_SUCCESS) {
6769 cmn_err(CE_WARN, "unable to xmit session msg");
6770 }
6771 }
6772 /* task will be completed from pppt */
6773 return;
6774 }
6775 stmf_scsilib_send_status(task, STATUS_GOOD, 0);
6776 }
6777
6778 /* ARGSUSED */
6779 void
6780 stmf_dlun0_status_done(scsi_task_t *task)
6781 {
6782 }
6783
6784 /* ARGSUSED */
6785 void
6786 stmf_dlun0_task_free(scsi_task_t *task)
6787 {
6788 }
6789
6790 /* ARGSUSED */
6791 stmf_status_t
6792 stmf_dlun0_abort(struct stmf_lu *lu, int abort_cmd, void *arg, uint32_t flags)
6793 {
6794 scsi_task_t *task = (scsi_task_t *)arg;
6795 stmf_i_scsi_task_t *itask =
6796 (stmf_i_scsi_task_t *)task->task_stmf_private;
6797 stmf_i_lu_t *ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
6798 int i;
6799 uint8_t map;
6800
6801 if ((task->task_mgmt_function) && (itask->itask_flags &
6802 (ITASK_CAUSING_LU_RESET | ITASK_CAUSING_TARGET_RESET))) {
6803 switch (task->task_mgmt_function) {
6804 case TM_ABORT_TASK:
6805 case TM_ABORT_TASK_SET:
6806 case TM_CLEAR_TASK_SET:
6807 case TM_LUN_RESET:
6808 atomic_and_32(&ilu->ilu_flags, ~ILU_RESET_ACTIVE);
6809 break;
6810 case TM_TARGET_RESET:
6811 case TM_TARGET_COLD_RESET:
6812 case TM_TARGET_WARM_RESET:
6813 stmf_abort_target_reset(task);
6814 break;
6815 }
6816 return (STMF_ABORT_SUCCESS);
6817 }
6818
6819 /*
6820 * OK so its not a task mgmt. Make sure we free any xd sitting
6821 * inside any dbuf.
6822 */
6823 if ((map = itask->itask_allocated_buf_map) != 0) {
6824 for (i = 0; i < 4; i++) {
6825 if ((map & 1) &&
6826 ((itask->itask_dbufs[i])->db_lu_private)) {
6827 stmf_xfer_data_t *xd;
6828 stmf_data_buf_t *dbuf;
6829
6830 dbuf = itask->itask_dbufs[i];
6831 xd = (stmf_xfer_data_t *)dbuf->db_lu_private;
6832 dbuf->db_lu_private = NULL;
6833 kmem_free(xd, xd->alloc_size);
6834 }
6835 map >>= 1;
6836 }
6837 }
6838 return (STMF_ABORT_SUCCESS);
6839 }
6840
6841 void
6842 stmf_dlun0_task_poll(struct scsi_task *task)
6843 {
6844 /* Right now we only do this for handling task management functions */
6845 ASSERT(task->task_mgmt_function);
6846
6847 switch (task->task_mgmt_function) {
6848 case TM_ABORT_TASK:
6849 case TM_ABORT_TASK_SET:
6850 case TM_CLEAR_TASK_SET:
6851 case TM_LUN_RESET:
6852 (void) stmf_lun_reset_poll(task->task_lu, task, 0);
6853 return;
6854 case TM_TARGET_RESET:
6855 case TM_TARGET_COLD_RESET:
6856 case TM_TARGET_WARM_RESET:
6857 stmf_target_reset_poll(task);
6858 return;
6859 }
6860 }
6861
6862 /* ARGSUSED */
6863 void
6864 stmf_dlun0_ctl(struct stmf_lu *lu, int cmd, void *arg)
6865 {
6866 /* This function will never be called */
6867 cmn_err(CE_WARN, "stmf_dlun0_ctl called with cmd %x", cmd);
6868 }
6869
6870 void
6871 stmf_dlun_init()
6872 {
6873 stmf_i_lu_t *ilu;
6874
6875 dlun0 = stmf_alloc(STMF_STRUCT_STMF_LU, 0, 0);
6876 dlun0->lu_task_alloc = stmf_dlun0_task_alloc;
6877 dlun0->lu_new_task = stmf_dlun0_new_task;
6878 dlun0->lu_dbuf_xfer_done = stmf_dlun0_dbuf_done;
6879 dlun0->lu_send_status_done = stmf_dlun0_status_done;
6880 dlun0->lu_task_free = stmf_dlun0_task_free;
6881 dlun0->lu_abort = stmf_dlun0_abort;
6882 dlun0->lu_task_poll = stmf_dlun0_task_poll;
6883 dlun0->lu_ctl = stmf_dlun0_ctl;
6884
6885 ilu = (stmf_i_lu_t *)dlun0->lu_stmf_private;
6886 ilu->ilu_cur_task_cntr = &ilu->ilu_task_cntr1;
6887 }
6888
6889 stmf_status_t
6890 stmf_dlun_fini()
6891 {
6892 stmf_i_lu_t *ilu;
6893
6894 ilu = (stmf_i_lu_t *)dlun0->lu_stmf_private;
6895
6896 ASSERT(ilu->ilu_ntasks == ilu->ilu_ntasks_free);
6897 if (ilu->ilu_ntasks) {
6898 stmf_i_scsi_task_t *itask, *nitask;
6899
6900 nitask = ilu->ilu_tasks;
6901 do {
6902 itask = nitask;
6903 nitask = itask->itask_lu_next;
6904 dlun0->lu_task_free(itask->itask_task);
6905 stmf_free(itask->itask_task);
6906 } while (nitask != NULL);
6907
6908 }
6909 stmf_free(dlun0);
6910 return (STMF_SUCCESS);
6911 }
6912
6913 void
6914 stmf_abort_target_reset(scsi_task_t *task)
6915 {
6916 stmf_i_scsi_session_t *iss = (stmf_i_scsi_session_t *)
6917 task->task_session->ss_stmf_private;
6918 stmf_lun_map_t *lm;
6919 stmf_lun_map_ent_t *lm_ent;
6920 stmf_i_lu_t *ilu;
6921 int i;
6922
6923 rw_enter(iss->iss_lockp, RW_READER);
6924 lm = iss->iss_sm;
6925 for (i = 0; i < lm->lm_nentries; i++) {
6926 if (lm->lm_plus[i] == NULL)
6927 continue;
6928 lm_ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
6929 ilu = (stmf_i_lu_t *)lm_ent->ent_lu->lu_stmf_private;
6930 if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
6931 atomic_and_32(&ilu->ilu_flags, ~ILU_RESET_ACTIVE);
6932 }
6933 }
6934 atomic_and_32(&iss->iss_flags, ~ISS_RESET_ACTIVE);
6935 rw_exit(iss->iss_lockp);
6936 }
6937
6938 /*
6939 * The return value is only used by function managing target reset.
6940 */
6941 stmf_status_t
6942 stmf_lun_reset_poll(stmf_lu_t *lu, struct scsi_task *task, int target_reset)
6943 {
6944 stmf_i_lu_t *ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
6945 int ntasks_pending;
6946
6947 ntasks_pending = ilu->ilu_ntasks - ilu->ilu_ntasks_free;
6948 /*
6949 * This function is also used during Target reset. The idea is that
6950 * once all the commands are aborted, call the LU's reset entry
6951 * point (abort entry point with a reset flag). But if this Task
6952 * mgmt is running on this LU then all the tasks cannot be aborted.
6953 * one task (this task) will still be running which is OK.
6954 */
6955 if ((ntasks_pending == 0) || ((task->task_lu == lu) &&
6956 (ntasks_pending == 1))) {
6957 stmf_status_t ret;
6958
6959 if ((task->task_mgmt_function == TM_LUN_RESET) ||
6960 (task->task_mgmt_function == TM_TARGET_RESET) ||
6961 (task->task_mgmt_function == TM_TARGET_WARM_RESET) ||
6962 (task->task_mgmt_function == TM_TARGET_COLD_RESET)) {
6963 ret = lu->lu_abort(lu, STMF_LU_RESET_STATE, task, 0);
6964 } else {
6965 ret = STMF_SUCCESS;
6966 }
6967 if (ret == STMF_SUCCESS) {
6968 atomic_and_32(&ilu->ilu_flags, ~ILU_RESET_ACTIVE);
6969 }
6970 if (target_reset) {
6971 return (ret);
6972 }
6973 if (ret == STMF_SUCCESS) {
6974 stmf_scsilib_send_status(task, STATUS_GOOD, 0);
6975 return (ret);
6976 }
6977 if (ret != STMF_BUSY) {
6978 stmf_abort(STMF_QUEUE_TASK_ABORT, task, ret, NULL);
6979 return (ret);
6980 }
6981 }
6982
6983 if (target_reset) {
6984 /* Tell target reset polling code that we are not done */
6985 return (STMF_BUSY);
6986 }
6987
6988 if (stmf_task_poll_lu(task, ITASK_DEFAULT_POLL_TIMEOUT)
6989 != STMF_SUCCESS) {
6990 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
6991 STMF_ALLOC_FAILURE, NULL);
6992 return (STMF_SUCCESS);
6993 }
6994
6995 return (STMF_SUCCESS);
6996 }
6997
6998 void
6999 stmf_target_reset_poll(struct scsi_task *task)
7000 {
7001 stmf_i_scsi_session_t *iss = (stmf_i_scsi_session_t *)
7002 task->task_session->ss_stmf_private;
7003 stmf_lun_map_t *lm;
7004 stmf_lun_map_ent_t *lm_ent;
7005 stmf_i_lu_t *ilu;
7006 stmf_status_t ret;
7007 int i;
7008 int not_done = 0;
7009
7010 ASSERT(iss->iss_flags & ISS_RESET_ACTIVE);
7011
7012 rw_enter(iss->iss_lockp, RW_READER);
7013 lm = iss->iss_sm;
7014 for (i = 0; i < lm->lm_nentries; i++) {
7015 if (lm->lm_plus[i] == NULL)
7016 continue;
7017 lm_ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
7018 ilu = (stmf_i_lu_t *)lm_ent->ent_lu->lu_stmf_private;
7019 if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
7020 rw_exit(iss->iss_lockp);
7021 ret = stmf_lun_reset_poll(lm_ent->ent_lu, task, 1);
7022 rw_enter(iss->iss_lockp, RW_READER);
7023 if (ret == STMF_SUCCESS)
7024 continue;
7025 not_done = 1;
7026 if (ret != STMF_BUSY) {
7027 rw_exit(iss->iss_lockp);
7028 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
7029 STMF_ABORTED, NULL);
7030 return;
7031 }
7032 }
7033 }
7034 rw_exit(iss->iss_lockp);
7035
7036 if (not_done) {
7037 if (stmf_task_poll_lu(task, ITASK_DEFAULT_POLL_TIMEOUT)
7038 != STMF_SUCCESS) {
7039 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
7040 STMF_ALLOC_FAILURE, NULL);
7041 return;
7042 }
7043 return;
7044 }
7045
7046 atomic_and_32(&iss->iss_flags, ~ISS_RESET_ACTIVE);
7047
7048 stmf_scsilib_send_status(task, STATUS_GOOD, 0);
7049 }
7050
7051 stmf_status_t
7052 stmf_lu_add_event(stmf_lu_t *lu, int eventid)
7053 {
7054 stmf_i_lu_t *ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
7055
7056 if ((eventid < 0) || (eventid >= STMF_MAX_NUM_EVENTS)) {
7057 return (STMF_INVALID_ARG);
7058 }
7059
7060 STMF_EVENT_ADD(ilu->ilu_event_hdl, eventid);
7061 return (STMF_SUCCESS);
7062 }
7063
7064 stmf_status_t
7065 stmf_lu_remove_event(stmf_lu_t *lu, int eventid)
7066 {
7067 stmf_i_lu_t *ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
7068
7069 if (eventid == STMF_EVENT_ALL) {
7070 STMF_EVENT_CLEAR_ALL(ilu->ilu_event_hdl);
7071 return (STMF_SUCCESS);
7072 }
7073
7074 if ((eventid < 0) || (eventid >= STMF_MAX_NUM_EVENTS)) {
7075 return (STMF_INVALID_ARG);
7076 }
7077
7078 STMF_EVENT_REMOVE(ilu->ilu_event_hdl, eventid);
7079 return (STMF_SUCCESS);
7080 }
7081
7082 stmf_status_t
7083 stmf_lport_add_event(stmf_local_port_t *lport, int eventid)
7084 {
7085 stmf_i_local_port_t *ilport =
7086 (stmf_i_local_port_t *)lport->lport_stmf_private;
7087
7088 if ((eventid < 0) || (eventid >= STMF_MAX_NUM_EVENTS)) {
7089 return (STMF_INVALID_ARG);
7090 }
7091
7092 STMF_EVENT_ADD(ilport->ilport_event_hdl, eventid);
7093 return (STMF_SUCCESS);
7094 }
7095
7096 stmf_status_t
7097 stmf_lport_remove_event(stmf_local_port_t *lport, int eventid)
7098 {
7099 stmf_i_local_port_t *ilport =
7100 (stmf_i_local_port_t *)lport->lport_stmf_private;
7101
7102 if (eventid == STMF_EVENT_ALL) {
7103 STMF_EVENT_CLEAR_ALL(ilport->ilport_event_hdl);
7104 return (STMF_SUCCESS);
7105 }
7106
7107 if ((eventid < 0) || (eventid >= STMF_MAX_NUM_EVENTS)) {
7108 return (STMF_INVALID_ARG);
7109 }
7110
7111 STMF_EVENT_REMOVE(ilport->ilport_event_hdl, eventid);
7112 return (STMF_SUCCESS);
7113 }
7114
7115 void
7116 stmf_generate_lu_event(stmf_i_lu_t *ilu, int eventid, void *arg, uint32_t flags)
7117 {
7118 if (STMF_EVENT_ENABLED(ilu->ilu_event_hdl, eventid) &&
7119 (ilu->ilu_lu->lu_event_handler != NULL)) {
7120 ilu->ilu_lu->lu_event_handler(ilu->ilu_lu, eventid, arg, flags);
7121 }
7122 }
7123
7124 void
7125 stmf_generate_lport_event(stmf_i_local_port_t *ilport, int eventid, void *arg,
7126 uint32_t flags)
7127 {
7128 if (STMF_EVENT_ENABLED(ilport->ilport_event_hdl, eventid) &&
7129 (ilport->ilport_lport->lport_event_handler != NULL)) {
7130 ilport->ilport_lport->lport_event_handler(
7131 ilport->ilport_lport, eventid, arg, flags);
7132 }
7133 }
7134
7135 /*
7136 * With the possibility of having multiple itl sessions pointing to the
7137 * same itl_kstat_info, the ilu_kstat_lock mutex is used to synchronize
7138 * the kstat update of the ilu_kstat_io, itl_kstat_taskq and itl_kstat_lu_xfer
7139 * statistics.
7140 */
7141 void
7142 stmf_itl_task_start(stmf_i_scsi_task_t *itask)
7143 {
7144 stmf_itl_data_t *itl = itask->itask_itl_datap;
7145 scsi_task_t *task = itask->itask_task;
7146 stmf_i_lu_t *ilu;
7147
7148 if (itl == NULL || task->task_lu == dlun0)
7149 return;
7150 ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
7151 itask->itask_start_timestamp = gethrtime();
7152 if (ilu->ilu_kstat_io != NULL) {
7153 mutex_enter(ilu->ilu_kstat_io->ks_lock);
7154 stmf_update_kstat_lu_q(itask->itask_task, kstat_waitq_enter);
7155 mutex_exit(ilu->ilu_kstat_io->ks_lock);
7156 }
7157
7158 stmf_update_kstat_lport_q(itask->itask_task, kstat_waitq_enter);
7159 }
7160
7161 void
7162 stmf_itl_lu_new_task(stmf_i_scsi_task_t *itask)
7163 {
7164 stmf_itl_data_t *itl = itask->itask_itl_datap;
7165 scsi_task_t *task = itask->itask_task;
7166 stmf_i_lu_t *ilu;
7167
7168 if (itl == NULL || task->task_lu == dlun0)
7169 return;
7170 ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
7171 if (ilu->ilu_kstat_io != NULL) {
7172 mutex_enter(ilu->ilu_kstat_io->ks_lock);
7173 stmf_update_kstat_lu_q(itask->itask_task, kstat_waitq_to_runq);
7174 mutex_exit(ilu->ilu_kstat_io->ks_lock);
7175 }
7176
7177 stmf_update_kstat_lport_q(itask->itask_task, kstat_waitq_to_runq);
7178 }
7179
7180 void
7181 stmf_itl_task_done(stmf_i_scsi_task_t *itask)
7182 {
7183 stmf_itl_data_t *itl = itask->itask_itl_datap;
7184 scsi_task_t *task = itask->itask_task;
7185 stmf_i_lu_t *ilu;
7186
7187 itask->itask_done_timestamp = gethrtime();
7188
7189 if (itl == NULL || task->task_lu == dlun0)
7190 return;
7191 ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
7192
7193 if (ilu->ilu_kstat_io == NULL)
7194 return;
7195
7196 mutex_enter(ilu->ilu_kstat_io->ks_lock);
7197
7198 if (itask->itask_flags & ITASK_KSTAT_IN_RUNQ) {
7199 stmf_update_kstat_lu_q(task, kstat_runq_exit);
7200 mutex_exit(ilu->ilu_kstat_io->ks_lock);
7201 stmf_update_kstat_lport_q(task, kstat_runq_exit);
7202 } else {
7203 stmf_update_kstat_lu_q(task, kstat_waitq_exit);
7204 mutex_exit(ilu->ilu_kstat_io->ks_lock);
7205 stmf_update_kstat_lport_q(task, kstat_waitq_exit);
7206 }
7207 }
7208
7209 static void
7210 stmf_lport_xfer_start(stmf_i_scsi_task_t *itask, stmf_data_buf_t *dbuf)
7211 {
7212 stmf_itl_data_t *itl = itask->itask_itl_datap;
7213
7214 if (itl == NULL)
7215 return;
7216
7217 DTRACE_PROBE2(scsi__xfer__start, scsi_task_t *, itask->itask_task,
7218 stmf_data_buf_t *, dbuf);
7219
7220 dbuf->db_xfer_start_timestamp = gethrtime();
7221 }
7222
7223 static void
7224 stmf_lport_xfer_done(stmf_i_scsi_task_t *itask, stmf_data_buf_t *dbuf)
7225 {
7226 stmf_itl_data_t *itl = itask->itask_itl_datap;
7227 hrtime_t elapsed_time;
7228 uint64_t xfer_size;
7229
7230 if (itl == NULL)
7231 return;
7232
7233 xfer_size = (dbuf->db_xfer_status == STMF_SUCCESS) ?
7234 dbuf->db_data_size : 0;
7235
7236 elapsed_time = gethrtime() - dbuf->db_xfer_start_timestamp;
7237 if (dbuf->db_flags & DB_DIRECTION_TO_RPORT) {
7238 atomic_add_64((uint64_t *)&itask->itask_lport_read_time,
7239 elapsed_time);
7240 atomic_add_64((uint64_t *)&itask->itask_read_xfer,
7241 xfer_size);
7242 } else {
7243 atomic_add_64((uint64_t *)&itask->itask_lport_write_time,
7244 elapsed_time);
7245 atomic_add_64((uint64_t *)&itask->itask_write_xfer,
7246 xfer_size);
7247 }
7248
7249 DTRACE_PROBE3(scsi__xfer__end, scsi_task_t *, itask->itask_task,
7250 stmf_data_buf_t *, dbuf, hrtime_t, elapsed_time);
7251
7252 dbuf->db_xfer_start_timestamp = 0;
7253 }
7254
7255 void
7256 stmf_svc_init()
7257 {
7258 if (stmf_state.stmf_svc_flags & STMF_SVC_STARTED)
7259 return;
7260 stmf_state.stmf_svc_tailp = &stmf_state.stmf_svc_active;
7261 stmf_state.stmf_svc_taskq = ddi_taskq_create(0, "STMF_SVC_TASKQ", 1,
7262 TASKQ_DEFAULTPRI, 0);
7263 (void) ddi_taskq_dispatch(stmf_state.stmf_svc_taskq,
7264 stmf_svc, 0, DDI_SLEEP);
7265 }
7266
7267 stmf_status_t
7268 stmf_svc_fini()
7269 {
7270 uint32_t i;
7271
7272 mutex_enter(&stmf_state.stmf_lock);
7273 if (stmf_state.stmf_svc_flags & STMF_SVC_STARTED) {
7274 stmf_state.stmf_svc_flags |= STMF_SVC_TERMINATE;
7275 cv_signal(&stmf_state.stmf_cv);
7276 }
7277 mutex_exit(&stmf_state.stmf_lock);
7278
7279 /* Wait for 5 seconds */
7280 for (i = 0; i < 500; i++) {
7281 if (stmf_state.stmf_svc_flags & STMF_SVC_STARTED)
7282 delay(drv_usectohz(10000));
7283 else
7284 break;
7285 }
7286 if (i == 500)
7287 return (STMF_BUSY);
7288
7289 ddi_taskq_destroy(stmf_state.stmf_svc_taskq);
7290
7291 return (STMF_SUCCESS);
7292 }
7293
7294 struct stmf_svc_clocks {
7295 clock_t drain_start, drain_next;
7296 clock_t timing_start, timing_next;
7297 clock_t worker_delay;
7298 };
7299
7300 /* ARGSUSED */
7301 void
7302 stmf_svc(void *arg)
7303 {
7304 stmf_svc_req_t *req;
7305 stmf_lu_t *lu;
7306 stmf_i_lu_t *ilu;
7307 stmf_local_port_t *lport;
7308 struct stmf_svc_clocks clks = { 0 };
7309
7310 mutex_enter(&stmf_state.stmf_lock);
7311 stmf_state.stmf_svc_flags |= STMF_SVC_STARTED | STMF_SVC_ACTIVE;
7312
7313 while (!(stmf_state.stmf_svc_flags & STMF_SVC_TERMINATE)) {
7314 if (stmf_state.stmf_svc_active == NULL) {
7315 stmf_svc_timeout(&clks);
7316 continue;
7317 }
7318
7319 /*
7320 * Pop the front request from the active list. After this,
7321 * the request will no longer be referenced by global state,
7322 * so it should be safe to access it without holding the
7323 * stmf state lock.
7324 */
7325 req = stmf_state.stmf_svc_active;
7326 stmf_state.stmf_svc_active = req->svc_next;
7327
7328 if (stmf_state.stmf_svc_active == NULL)
7329 stmf_state.stmf_svc_tailp = &stmf_state.stmf_svc_active;
7330
7331 switch (req->svc_cmd) {
7332 case STMF_CMD_LPORT_ONLINE:
7333 /* Fallthrough */
7334 case STMF_CMD_LPORT_OFFLINE:
7335 mutex_exit(&stmf_state.stmf_lock);
7336 lport = (stmf_local_port_t *)req->svc_obj;
7337 lport->lport_ctl(lport, req->svc_cmd, &req->svc_info);
7338 break;
7339 case STMF_CMD_LU_ONLINE:
7340 mutex_exit(&stmf_state.stmf_lock);
7341 lu = (stmf_lu_t *)req->svc_obj;
7342 lu->lu_ctl(lu, req->svc_cmd, &req->svc_info);
7343 break;
7344 case STMF_CMD_LU_OFFLINE:
7345 /* Remove all mappings of this LU */
7346 stmf_session_lu_unmapall((stmf_lu_t *)req->svc_obj);
7347 /* Kill all the pending I/Os for this LU */
7348 mutex_exit(&stmf_state.stmf_lock);
7349 stmf_task_lu_killall((stmf_lu_t *)req->svc_obj, NULL,
7350 STMF_ABORTED);
7351 lu = (stmf_lu_t *)req->svc_obj;
7352 ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
7353 stmf_wait_ilu_tasks_finish(ilu);
7354 lu->lu_ctl(lu, req->svc_cmd, &req->svc_info);
7355 break;
7356 default:
7357 cmn_err(CE_PANIC, "stmf_svc: unknown cmd %d",
7358 req->svc_cmd);
7359 }
7360
7361 kmem_free(req, req->svc_req_alloc_size);
7362 mutex_enter(&stmf_state.stmf_lock);
7363 }
7364
7365 stmf_state.stmf_svc_flags &= ~(STMF_SVC_STARTED | STMF_SVC_ACTIVE);
7366 mutex_exit(&stmf_state.stmf_lock);
7367 }
7368
7369 static void
7370 stmf_svc_timeout(struct stmf_svc_clocks *clks)
7371 {
7372 clock_t td;
7373 stmf_i_local_port_t *ilport, *next_ilport;
7374 stmf_i_scsi_session_t *iss;
7375
7376 ASSERT(mutex_owned(&stmf_state.stmf_lock));
7377
7378 td = drv_usectohz(20000);
7379
7380 /* Do timeouts */
7381 if (stmf_state.stmf_nlus &&
7382 ((!clks->timing_next) || (ddi_get_lbolt() >= clks->timing_next))) {
7383 if (!stmf_state.stmf_svc_ilu_timing) {
7384 /* we are starting a new round */
7385 stmf_state.stmf_svc_ilu_timing =
7386 stmf_state.stmf_ilulist;
7387 clks->timing_start = ddi_get_lbolt();
7388 }
7389
7390 stmf_check_ilu_timing();
7391 if (!stmf_state.stmf_svc_ilu_timing) {
7392 /* we finished a complete round */
7393 clks->timing_next =
7394 clks->timing_start + drv_usectohz(5*1000*1000);
7395 } else {
7396 /* we still have some ilu items to check */
7397 clks->timing_next =
7398 ddi_get_lbolt() + drv_usectohz(1*1000*1000);
7399 }
7400
7401 if (stmf_state.stmf_svc_active)
7402 return;
7403 }
7404
7405 /* Check if there are free tasks to clear */
7406 if (stmf_state.stmf_nlus &&
7407 ((!clks->drain_next) || (ddi_get_lbolt() >= clks->drain_next))) {
7408 if (!stmf_state.stmf_svc_ilu_draining) {
7409 /* we are starting a new round */
7410 stmf_state.stmf_svc_ilu_draining =
7411 stmf_state.stmf_ilulist;
7412 clks->drain_start = ddi_get_lbolt();
7413 }
7414
7415 stmf_check_freetask();
7416 if (!stmf_state.stmf_svc_ilu_draining) {
7417 /* we finished a complete round */
7418 clks->drain_next =
7419 clks->drain_start + drv_usectohz(10*1000*1000);
7420 } else {
7421 /* we still have some ilu items to check */
7422 clks->drain_next =
7423 ddi_get_lbolt() + drv_usectohz(1*1000*1000);
7424 }
7425
7426 if (stmf_state.stmf_svc_active)
7427 return;
7428 }
7429
7430 /* Check if we need to run worker_mgmt */
7431 if (ddi_get_lbolt() > clks->worker_delay) {
7432 stmf_worker_mgmt();
7433 clks->worker_delay = ddi_get_lbolt() +
7434 stmf_worker_mgmt_delay;
7435 }
7436
7437 /* Check if any active session got its 1st LUN */
7438 if (stmf_state.stmf_process_initial_luns) {
7439 int stmf_level = 0;
7440 int port_level;
7441
7442 for (ilport = stmf_state.stmf_ilportlist; ilport;
7443 ilport = next_ilport) {
7444 int ilport_lock_held;
7445 next_ilport = ilport->ilport_next;
7446
7447 if ((ilport->ilport_flags &
7448 ILPORT_SS_GOT_INITIAL_LUNS) == 0)
7449 continue;
7450
7451 port_level = 0;
7452 rw_enter(&ilport->ilport_lock, RW_READER);
7453 ilport_lock_held = 1;
7454
7455 for (iss = ilport->ilport_ss_list; iss;
7456 iss = iss->iss_next) {
7457 if ((iss->iss_flags &
7458 ISS_GOT_INITIAL_LUNS) == 0)
7459 continue;
7460
7461 port_level++;
7462 stmf_level++;
7463 atomic_and_32(&iss->iss_flags,
7464 ~ISS_GOT_INITIAL_LUNS);
7465 atomic_or_32(&iss->iss_flags,
7466 ISS_EVENT_ACTIVE);
7467 rw_exit(&ilport->ilport_lock);
7468 ilport_lock_held = 0;
7469 mutex_exit(&stmf_state.stmf_lock);
7470 stmf_generate_lport_event(ilport,
7471 LPORT_EVENT_INITIAL_LUN_MAPPED,
7472 iss->iss_ss, 0);
7473 atomic_and_32(&iss->iss_flags,
7474 ~ISS_EVENT_ACTIVE);
7475 mutex_enter(&stmf_state.stmf_lock);
7476 /*
7477 * scan all the ilports again as the
7478 * ilport list might have changed.
7479 */
7480 next_ilport = stmf_state.stmf_ilportlist;
7481 break;
7482 }
7483
7484 if (port_level == 0)
7485 atomic_and_32(&ilport->ilport_flags,
7486 ~ILPORT_SS_GOT_INITIAL_LUNS);
7487 /* drop the lock if we are holding it. */
7488 if (ilport_lock_held == 1)
7489 rw_exit(&ilport->ilport_lock);
7490
7491 /* Max 4 session at a time */
7492 if (stmf_level >= 4)
7493 break;
7494 }
7495
7496 if (stmf_level == 0)
7497 stmf_state.stmf_process_initial_luns = 0;
7498 }
7499
7500 stmf_state.stmf_svc_flags &= ~STMF_SVC_ACTIVE;
7501 (void) cv_reltimedwait(&stmf_state.stmf_cv,
7502 &stmf_state.stmf_lock, td, TR_CLOCK_TICK);
7503 stmf_state.stmf_svc_flags |= STMF_SVC_ACTIVE;
7504 }
7505
7506 /*
7507 * Waits for ongoing I/O tasks to finish on an LU in preparation for
7508 * the LU's offlining. The LU should already be in an Offlining state
7509 * (otherwise I/O to the LU might never end). There is an additional
7510 * enforcement of this via a deadman timer check.
7511 */
7512 static void
7513 stmf_wait_ilu_tasks_finish(stmf_i_lu_t *ilu)
7514 {
7515 clock_t start, now, deadline;
7516
7517 start = now = ddi_get_lbolt();
7518 deadline = start + drv_usectohz(stmf_io_deadman * 1000000llu);
7519 mutex_enter(&ilu->ilu_task_lock);
7520 while (ilu->ilu_ntasks != ilu->ilu_ntasks_free) {
7521 (void) cv_timedwait(&ilu->ilu_offline_pending_cv,
7522 &ilu->ilu_task_lock, deadline);
7523 now = ddi_get_lbolt();
7524 if (now > deadline) {
7525 if (stmf_io_deadman_enabled) {
7526 cmn_err(CE_PANIC, "stmf_svc: I/O deadman hit "
7527 "on STMF_CMD_LU_OFFLINE after %d seconds",
7528 stmf_io_deadman);
7529 } else {
7530 /* keep on spinning */
7531 deadline = now + drv_usectohz(stmf_io_deadman *
7532 1000000llu);
7533 }
7534 }
7535 }
7536 mutex_exit(&ilu->ilu_task_lock);
7537 DTRACE_PROBE1(deadman__timeout__wait, clock_t, now - start);
7538 }
7539
7540 void
7541 stmf_svc_queue(int cmd, void *obj, stmf_state_change_info_t *info)
7542 {
7543 stmf_svc_req_t *req;
7544 int s;
7545
7546 ASSERT(!mutex_owned(&stmf_state.stmf_lock));
7547 s = sizeof (stmf_svc_req_t);
7548 if (info->st_additional_info) {
7549 s += strlen(info->st_additional_info) + 1;
7550 }
7551 req = kmem_zalloc(s, KM_SLEEP);
7552
7553 req->svc_cmd = cmd;
7554 req->svc_obj = obj;
7555 req->svc_info.st_rflags = info->st_rflags;
7556 if (info->st_additional_info) {
7557 req->svc_info.st_additional_info = (char *)(GET_BYTE_OFFSET(req,
7558 sizeof (stmf_svc_req_t)));
7559 (void) strcpy(req->svc_info.st_additional_info,
7560 info->st_additional_info);
7561 }
7562 req->svc_req_alloc_size = s;
7563 req->svc_next = NULL;
7564
7565 mutex_enter(&stmf_state.stmf_lock);
7566 *stmf_state.stmf_svc_tailp = req;
7567 stmf_state.stmf_svc_tailp = &req->svc_next;
7568 if ((stmf_state.stmf_svc_flags & STMF_SVC_ACTIVE) == 0) {
7569 cv_signal(&stmf_state.stmf_cv);
7570 }
7571 mutex_exit(&stmf_state.stmf_lock);
7572 }
7573
7574 static void
7575 stmf_svc_kill_obj_requests(void *obj)
7576 {
7577 stmf_svc_req_t *prev_req = NULL;
7578 stmf_svc_req_t *next_req;
7579 stmf_svc_req_t *req;
7580
7581 ASSERT(mutex_owned(&stmf_state.stmf_lock));
7582
7583 for (req = stmf_state.stmf_svc_active; req != NULL; req = next_req) {
7584 next_req = req->svc_next;
7585
7586 if (req->svc_obj == obj) {
7587 if (prev_req != NULL)
7588 prev_req->svc_next = next_req;
7589 else
7590 stmf_state.stmf_svc_active = next_req;
7591
7592 if (next_req == NULL)
7593 stmf_state.stmf_svc_tailp = (prev_req != NULL) ?
7594 &prev_req->svc_next :
7595 &stmf_state.stmf_svc_active;
7596
7597 kmem_free(req, req->svc_req_alloc_size);
7598 } else {
7599 prev_req = req;
7600 }
7601 }
7602 }
7603
7604 void
7605 stmf_trace(caddr_t ident, const char *fmt, ...)
7606 {
7607 va_list args;
7608 char tbuf[160];
7609 int len;
7610
7611 if (!stmf_trace_on)
7612 return;
7613 len = snprintf(tbuf, 158, "%s:%07lu: ", ident ? ident : "",
7614 ddi_get_lbolt());
7615 va_start(args, fmt);
7616 len += vsnprintf(tbuf + len, 158 - len, fmt, args);
7617 va_end(args);
7618
7619 if (len > 158) {
7620 len = 158;
7621 }
7622 tbuf[len++] = '\n';
7623 tbuf[len] = 0;
7624
7625 mutex_enter(&trace_buf_lock);
7626 bcopy(tbuf, &stmf_trace_buf[trace_buf_curndx], len+1);
7627 trace_buf_curndx += len;
7628 if (trace_buf_curndx > (trace_buf_size - 320))
7629 trace_buf_curndx = 0;
7630 mutex_exit(&trace_buf_lock);
7631 }
7632
7633 void
7634 stmf_trace_clear()
7635 {
7636 if (!stmf_trace_on)
7637 return;
7638 mutex_enter(&trace_buf_lock);
7639 trace_buf_curndx = 0;
7640 if (trace_buf_size > 0)
7641 stmf_trace_buf[0] = 0;
7642 mutex_exit(&trace_buf_lock);
7643 }
7644
7645 static void
7646 stmf_abort_task_offline(scsi_task_t *task, int offline_lu, char *info)
7647 {
7648 stmf_state_change_info_t change_info;
7649 void *ctl_private;
7650 uint32_t ctl_cmd;
7651 int msg = 0;
7652
7653 stmf_trace("FROM STMF", "abort_task_offline called for %s: %s",
7654 offline_lu ? "LU" : "LPORT", info ? info : "no additional info");
7655 change_info.st_additional_info = info;
7656 if (offline_lu) {
7657 change_info.st_rflags = STMF_RFLAG_RESET |
7658 STMF_RFLAG_LU_ABORT;
7659 ctl_private = task->task_lu;
7660 if (((stmf_i_lu_t *)
7661 task->task_lu->lu_stmf_private)->ilu_state ==
7662 STMF_STATE_ONLINE) {
7663 msg = 1;
7664 }
7665 ctl_cmd = STMF_CMD_LU_OFFLINE;
7666 } else {
7667 change_info.st_rflags = STMF_RFLAG_RESET |
7668 STMF_RFLAG_LPORT_ABORT;
7669 ctl_private = task->task_lport;
7670 if (((stmf_i_local_port_t *)
7671 task->task_lport->lport_stmf_private)->ilport_state ==
7672 STMF_STATE_ONLINE) {
7673 msg = 1;
7674 }
7675 ctl_cmd = STMF_CMD_LPORT_OFFLINE;
7676 }
7677
7678 if (msg) {
7679 stmf_trace(0, "Calling stmf_ctl to offline %s : %s",
7680 offline_lu ? "LU" : "LPORT", info ? info :
7681 "<no additional info>");
7682 }
7683 (void) stmf_ctl(ctl_cmd, ctl_private, &change_info);
7684 }
7685
7686 static char
7687 stmf_ctoi(char c)
7688 {
7689 if ((c >= '0') && (c <= '9'))
7690 c -= '0';
7691 else if ((c >= 'A') && (c <= 'F'))
7692 c = c - 'A' + 10;
7693 else if ((c >= 'a') && (c <= 'f'))
7694 c = c - 'a' + 10;
7695 else
7696 c = -1;
7697 return (c);
7698 }
7699
7700 /* Convert from Hex value in ASCII format to the equivalent bytes */
7701 static boolean_t
7702 stmf_base16_str_to_binary(char *c, int dplen, uint8_t *dp)
7703 {
7704 int ii;
7705
7706 for (ii = 0; ii < dplen; ii++) {
7707 char nibble1, nibble2;
7708 char enc_char = *c++;
7709 nibble1 = stmf_ctoi(enc_char);
7710
7711 enc_char = *c++;
7712 nibble2 = stmf_ctoi(enc_char);
7713 if (nibble1 == -1 || nibble2 == -1)
7714 return (B_FALSE);
7715
7716 dp[ii] = (nibble1 << 4) | nibble2;
7717 }
7718 return (B_TRUE);
7719 }
7720
7721 boolean_t
7722 stmf_scsilib_tptid_validate(scsi_transport_id_t *tptid, uint32_t total_sz,
7723 uint16_t *tptid_sz)
7724 {
7725 uint16_t tpd_len = SCSI_TPTID_SIZE;
7726
7727 if (tptid_sz)
7728 *tptid_sz = 0;
7729 if (total_sz < sizeof (scsi_transport_id_t))
7730 return (B_FALSE);
7731
7732 switch (tptid->protocol_id) {
7733
7734 case PROTOCOL_FIBRE_CHANNEL:
7735 /* FC Transport ID validation checks. SPC3 rev23, Table 284 */
7736 if (total_sz < tpd_len || tptid->format_code != 0)
7737 return (B_FALSE);
7738 break;
7739
7740 case PROTOCOL_iSCSI:
7741 {
7742 iscsi_transport_id_t *iscsiid;
7743 uint16_t adn_len, name_len;
7744
7745 /* Check for valid format code, SPC3 rev 23 Table 288 */
7746 if ((total_sz < tpd_len) ||
7747 (tptid->format_code != 0 && tptid->format_code != 1))
7748 return (B_FALSE);
7749
7750 iscsiid = (iscsi_transport_id_t *)tptid;
7751 adn_len = READ_SCSI16(iscsiid->add_len, uint16_t);
7752 tpd_len = sizeof (iscsi_transport_id_t) + adn_len - 1;
7753
7754 /*
7755 * iSCSI Transport ID validation checks.
7756 * As per SPC3 rev 23 Section 7.5.4.6 and Table 289 & Table 290
7757 */
7758 if (adn_len < 20 || (adn_len % 4 != 0))
7759 return (B_FALSE);
7760
7761 name_len = strnlen(iscsiid->iscsi_name, adn_len);
7762 if (name_len == 0 || name_len >= adn_len)
7763 return (B_FALSE);
7764
7765 /* If the format_code is 1 check for ISID seperator */
7766 if ((tptid->format_code == 1) && (strstr(iscsiid->iscsi_name,
7767 SCSI_TPTID_ISCSI_ISID_SEPERATOR) == NULL))
7768 return (B_FALSE);
7769
7770 }
7771 break;
7772
7773 case PROTOCOL_SRP:
7774 /* SRP Transport ID validation checks. SPC3 rev23, Table 287 */
7775 if (total_sz < tpd_len || tptid->format_code != 0)
7776 return (B_FALSE);
7777 break;
7778
7779 case PROTOCOL_PARALLEL_SCSI:
7780 case PROTOCOL_SSA:
7781 case PROTOCOL_IEEE_1394:
7782 case PROTOCOL_SAS:
7783 case PROTOCOL_ADT:
7784 case PROTOCOL_ATAPI:
7785 default:
7786 {
7787 stmf_dflt_scsi_tptid_t *dflttpd;
7788
7789 tpd_len = sizeof (stmf_dflt_scsi_tptid_t);
7790 if (total_sz < tpd_len)
7791 return (B_FALSE);
7792 dflttpd = (stmf_dflt_scsi_tptid_t *)tptid;
7793 tpd_len = tpd_len + SCSI_READ16(&dflttpd->ident_len) - 1;
7794 if (total_sz < tpd_len)
7795 return (B_FALSE);
7796 }
7797 break;
7798 }
7799 if (tptid_sz)
7800 *tptid_sz = tpd_len;
7801 return (B_TRUE);
7802 }
7803
7804 boolean_t
7805 stmf_scsilib_tptid_compare(scsi_transport_id_t *tpd1,
7806 scsi_transport_id_t *tpd2)
7807 {
7808 if ((tpd1->protocol_id != tpd2->protocol_id) ||
7809 (tpd1->format_code != tpd2->format_code))
7810 return (B_FALSE);
7811
7812 switch (tpd1->protocol_id) {
7813
7814 case PROTOCOL_iSCSI:
7815 {
7816 iscsi_transport_id_t *iscsitpd1, *iscsitpd2;
7817 uint16_t len;
7818
7819 iscsitpd1 = (iscsi_transport_id_t *)tpd1;
7820 iscsitpd2 = (iscsi_transport_id_t *)tpd2;
7821 len = SCSI_READ16(&iscsitpd1->add_len);
7822 if ((memcmp(iscsitpd1->add_len, iscsitpd2->add_len, 2) != 0) ||
7823 (memcmp(iscsitpd1->iscsi_name, iscsitpd2->iscsi_name, len)
7824 != 0))
7825 return (B_FALSE);
7826 }
7827 break;
7828
7829 case PROTOCOL_SRP:
7830 {
7831 scsi_srp_transport_id_t *srptpd1, *srptpd2;
7832
7833 srptpd1 = (scsi_srp_transport_id_t *)tpd1;
7834 srptpd2 = (scsi_srp_transport_id_t *)tpd2;
7835 if (memcmp(srptpd1->srp_name, srptpd2->srp_name,
7836 sizeof (srptpd1->srp_name)) != 0)
7837 return (B_FALSE);
7838 }
7839 break;
7840
7841 case PROTOCOL_FIBRE_CHANNEL:
7842 {
7843 scsi_fc_transport_id_t *fctpd1, *fctpd2;
7844
7845 fctpd1 = (scsi_fc_transport_id_t *)tpd1;
7846 fctpd2 = (scsi_fc_transport_id_t *)tpd2;
7847 if (memcmp(fctpd1->port_name, fctpd2->port_name,
7848 sizeof (fctpd1->port_name)) != 0)
7849 return (B_FALSE);
7850 }
7851 break;
7852
7853 case PROTOCOL_PARALLEL_SCSI:
7854 case PROTOCOL_SSA:
7855 case PROTOCOL_IEEE_1394:
7856 case PROTOCOL_SAS:
7857 case PROTOCOL_ADT:
7858 case PROTOCOL_ATAPI:
7859 default:
7860 {
7861 stmf_dflt_scsi_tptid_t *dflt1, *dflt2;
7862 uint16_t len;
7863
7864 dflt1 = (stmf_dflt_scsi_tptid_t *)tpd1;
7865 dflt2 = (stmf_dflt_scsi_tptid_t *)tpd2;
7866 len = SCSI_READ16(&dflt1->ident_len);
7867 if ((memcmp(dflt1->ident_len, dflt2->ident_len, 2) != 0) ||
7868 (memcmp(dflt1->ident, dflt2->ident, len) != 0))
7869 return (B_FALSE);
7870 }
7871 break;
7872 }
7873 return (B_TRUE);
7874 }
7875
7876 /*
7877 * Changes devid_desc to corresponding TransportID format
7878 * Returns :- pointer to stmf_remote_port_t
7879 * Note :- Allocates continous memory for stmf_remote_port_t and TransportID,
7880 * This memory need to be freed when this remote_port is no longer
7881 * used.
7882 */
7883 stmf_remote_port_t *
7884 stmf_scsilib_devid_to_remote_port(scsi_devid_desc_t *devid)
7885 {
7886 struct scsi_fc_transport_id *fc_tpd;
7887 struct iscsi_transport_id *iscsi_tpd;
7888 struct scsi_srp_transport_id *srp_tpd;
7889 struct stmf_dflt_scsi_tptid *dflt_tpd;
7890 uint16_t ident_len, sz = 0;
7891 stmf_remote_port_t *rpt = NULL;
7892
7893 ident_len = devid->ident_length;
7894 ASSERT(ident_len);
7895 switch (devid->protocol_id) {
7896 case PROTOCOL_FIBRE_CHANNEL:
7897 sz = sizeof (scsi_fc_transport_id_t);
7898 rpt = stmf_remote_port_alloc(sz);
7899 rpt->rport_tptid->format_code = 0;
7900 rpt->rport_tptid->protocol_id = devid->protocol_id;
7901 fc_tpd = (scsi_fc_transport_id_t *)rpt->rport_tptid;
7902 /*
7903 * convert from "wwn.xxxxxxxxxxxxxxxx" to 8-byte binary
7904 * skip first 4 byte for "wwn."
7905 */
7906 ASSERT(strncmp("wwn.", (char *)devid->ident, 4) == 0);
7907 if ((ident_len < SCSI_TPTID_FC_PORT_NAME_SIZE * 2 + 4) ||
7908 !stmf_base16_str_to_binary((char *)devid->ident + 4,
7909 SCSI_TPTID_FC_PORT_NAME_SIZE, fc_tpd->port_name))
7910 goto devid_to_remote_port_fail;
7911 break;
7912
7913 case PROTOCOL_iSCSI:
7914 sz = ALIGNED_TO_8BYTE_BOUNDARY(sizeof (iscsi_transport_id_t) +
7915 ident_len - 1);
7916 rpt = stmf_remote_port_alloc(sz);
7917 rpt->rport_tptid->format_code = 0;
7918 rpt->rport_tptid->protocol_id = devid->protocol_id;
7919 iscsi_tpd = (iscsi_transport_id_t *)rpt->rport_tptid;
7920 SCSI_WRITE16(iscsi_tpd->add_len, ident_len);
7921 (void) memcpy(iscsi_tpd->iscsi_name, devid->ident, ident_len);
7922 break;
7923
7924 case PROTOCOL_SRP:
7925 sz = sizeof (scsi_srp_transport_id_t);
7926 rpt = stmf_remote_port_alloc(sz);
7927 rpt->rport_tptid->format_code = 0;
7928 rpt->rport_tptid->protocol_id = devid->protocol_id;
7929 srp_tpd = (scsi_srp_transport_id_t *)rpt->rport_tptid;
7930 /*
7931 * convert from "eui.xxxxxxxxxxxxxxx" to 8-byte binary
7932 * skip first 4 byte for "eui."
7933 * Assume 8-byte initiator-extension part of srp_name is NOT
7934 * stored in devid and hence will be set as zero
7935 */
7936 ASSERT(strncmp("eui.", (char *)devid->ident, 4) == 0);
7937 if ((ident_len < (SCSI_TPTID_SRP_PORT_NAME_LEN - 8) * 2 + 4) ||
7938 !stmf_base16_str_to_binary((char *)devid->ident+4,
7939 SCSI_TPTID_SRP_PORT_NAME_LEN, srp_tpd->srp_name))
7940 goto devid_to_remote_port_fail;
7941 break;
7942
7943 case PROTOCOL_PARALLEL_SCSI:
7944 case PROTOCOL_SSA:
7945 case PROTOCOL_IEEE_1394:
7946 case PROTOCOL_SAS:
7947 case PROTOCOL_ADT:
7948 case PROTOCOL_ATAPI:
7949 default :
7950 ident_len = devid->ident_length;
7951 sz = ALIGNED_TO_8BYTE_BOUNDARY(sizeof (stmf_dflt_scsi_tptid_t) +
7952 ident_len - 1);
7953 rpt = stmf_remote_port_alloc(sz);
7954 rpt->rport_tptid->format_code = 0;
7955 rpt->rport_tptid->protocol_id = devid->protocol_id;
7956 dflt_tpd = (stmf_dflt_scsi_tptid_t *)rpt->rport_tptid;
7957 SCSI_WRITE16(dflt_tpd->ident_len, ident_len);
7958 (void) memcpy(dflt_tpd->ident, devid->ident, ident_len);
7959 break;
7960 }
7961 return (rpt);
7962
7963 devid_to_remote_port_fail:
7964 stmf_remote_port_free(rpt);
7965 return (NULL);
7966
7967 }
7968
7969 stmf_remote_port_t *
7970 stmf_remote_port_alloc(uint16_t tptid_sz) {
7971 stmf_remote_port_t *rpt;
7972 rpt = (stmf_remote_port_t *)kmem_zalloc(
7973 sizeof (stmf_remote_port_t) + tptid_sz, KM_SLEEP);
7974 rpt->rport_tptid_sz = tptid_sz;
7975 rpt->rport_tptid = (scsi_transport_id_t *)(rpt + 1);
7976 return (rpt);
7977 }
7978
7979 void
7980 stmf_remote_port_free(stmf_remote_port_t *rpt)
7981 {
7982 /*
7983 * Note: stmf_scsilib_devid_to_remote_port() function allocates
7984 * remote port structures for all transports in the same way, So
7985 * it is safe to deallocate it in a protocol independent manner.
7986 * If any of the allocation method changes, corresponding changes
7987 * need to be made here too.
7988 */
7989 kmem_free(rpt, sizeof (stmf_remote_port_t) + rpt->rport_tptid_sz);
7990 }
Unleashed OS