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qlcnic: Fix trivial typo in comment
[linux-2.6/btrfs-unstable.git] / drivers / scsi / scsi_transport_iscsi.c
blob67d43e35693df9e9e119bb6a4c2faac56f1bc260
1 /*
2 * iSCSI transport class definitions
3 *
4 * Copyright (C) IBM Corporation, 2004
5 * Copyright (C) Mike Christie, 2004 - 2005
6 * Copyright (C) Dmitry Yusupov, 2004 - 2005
7 * Copyright (C) Alex Aizman, 2004 - 2005
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23 #include <linux/module.h>
24 #include <linux/mutex.h>
25 #include <linux/slab.h>
26 #include <linux/bsg-lib.h>
27 #include <linux/idr.h>
28 #include <net/tcp.h>
29 #include <scsi/scsi.h>
30 #include <scsi/scsi_host.h>
31 #include <scsi/scsi_device.h>
32 #include <scsi/scsi_transport.h>
33 #include <scsi/scsi_transport_iscsi.h>
34 #include <scsi/iscsi_if.h>
35 #include <scsi/scsi_cmnd.h>
36 #include <scsi/scsi_bsg_iscsi.h>
37
38 #define ISCSI_TRANSPORT_VERSION "2.0-870"
39
40 static int dbg_session;
41 module_param_named(debug_session, dbg_session, int,
42 S_IRUGO | S_IWUSR);
43 MODULE_PARM_DESC(debug_session,
44 "Turn on debugging for sessions in scsi_transport_iscsi "
45 "module. Set to 1 to turn on, and zero to turn off. Default "
46 "is off.");
47
48 static int dbg_conn;
49 module_param_named(debug_conn, dbg_conn, int,
50 S_IRUGO | S_IWUSR);
51 MODULE_PARM_DESC(debug_conn,
52 "Turn on debugging for connections in scsi_transport_iscsi "
53 "module. Set to 1 to turn on, and zero to turn off. Default "
54 "is off.");
55
56 #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \
57 do { \
58 if (dbg_session) \
59 iscsi_cls_session_printk(KERN_INFO, _session, \
60 "%s: " dbg_fmt, \
61 __func__, ##arg); \
62 } while (0);
63
64 #define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \
65 do { \
66 if (dbg_conn) \
67 iscsi_cls_conn_printk(KERN_INFO, _conn, \
68 "%s: " dbg_fmt, \
69 __func__, ##arg); \
70 } while (0);
71
72 struct iscsi_internal {
73 struct scsi_transport_template t;
74 struct iscsi_transport *iscsi_transport;
75 struct list_head list;
76 struct device dev;
77
78 struct transport_container conn_cont;
79 struct transport_container session_cont;
80 };
81
82 static atomic_t iscsi_session_nr; /* sysfs session id for next new session */
83 static struct workqueue_struct *iscsi_eh_timer_workq;
84
85 static DEFINE_IDA(iscsi_sess_ida);
86 /*
87 * list of registered transports and lock that must
88 * be held while accessing list. The iscsi_transport_lock must
89 * be acquired after the rx_queue_mutex.
90 */
91 static LIST_HEAD(iscsi_transports);
92 static DEFINE_SPINLOCK(iscsi_transport_lock);
93
94 #define to_iscsi_internal(tmpl) \
95 container_of(tmpl, struct iscsi_internal, t)
96
97 #define dev_to_iscsi_internal(_dev) \
98 container_of(_dev, struct iscsi_internal, dev)
99
100 static void iscsi_transport_release(struct device *dev)
101 {
102 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
103 kfree(priv);
104 }
105
106 /*
107 * iscsi_transport_class represents the iscsi_transports that are
108 * registered.
109 */
110 static struct class iscsi_transport_class = {
111 .name = "iscsi_transport",
112 .dev_release = iscsi_transport_release,
113 };
114
115 static ssize_t
116 show_transport_handle(struct device *dev, struct device_attribute *attr,
117 char *buf)
118 {
119 struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
120 return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
121 }
122 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
123
124 #define show_transport_attr(name, format) \
125 static ssize_t \
126 show_transport_##name(struct device *dev, \
127 struct device_attribute *attr,char *buf) \
128 { \
129 struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
130 return sprintf(buf, format"\n", priv->iscsi_transport->name); \
131 } \
132 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
133
134 show_transport_attr(caps, "0x%x");
135
136 static struct attribute *iscsi_transport_attrs[] = {
137 &dev_attr_handle.attr,
138 &dev_attr_caps.attr,
139 NULL,
140 };
141
142 static struct attribute_group iscsi_transport_group = {
143 .attrs = iscsi_transport_attrs,
144 };
145
146 /*
147 * iSCSI endpoint attrs
148 */
149 #define iscsi_dev_to_endpoint(_dev) \
150 container_of(_dev, struct iscsi_endpoint, dev)
151
152 #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \
153 struct device_attribute dev_attr_##_prefix##_##_name = \
154 __ATTR(_name,_mode,_show,_store)
155
156 static void iscsi_endpoint_release(struct device *dev)
157 {
158 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
159 kfree(ep);
160 }
161
162 static struct class iscsi_endpoint_class = {
163 .name = "iscsi_endpoint",
164 .dev_release = iscsi_endpoint_release,
165 };
166
167 static ssize_t
168 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
169 {
170 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
171 return sprintf(buf, "%llu\n", (unsigned long long) ep->id);
172 }
173 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
174
175 static struct attribute *iscsi_endpoint_attrs[] = {
176 &dev_attr_ep_handle.attr,
177 NULL,
178 };
179
180 static struct attribute_group iscsi_endpoint_group = {
181 .attrs = iscsi_endpoint_attrs,
182 };
183
184 #define ISCSI_MAX_EPID -1
185
186 static int iscsi_match_epid(struct device *dev, const void *data)
187 {
188 struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
189 const uint64_t *epid = data;
190
191 return *epid == ep->id;
192 }
193
194 struct iscsi_endpoint *
195 iscsi_create_endpoint(int dd_size)
196 {
197 struct device *dev;
198 struct iscsi_endpoint *ep;
199 uint64_t id;
200 int err;
201
202 for (id = 1; id < ISCSI_MAX_EPID; id++) {
203 dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
204 iscsi_match_epid);
205 if (!dev)
206 break;
207 }
208 if (id == ISCSI_MAX_EPID) {
209 printk(KERN_ERR "Too many connections. Max supported %u\n",
210 ISCSI_MAX_EPID - 1);
211 return NULL;
212 }
213
214 ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
215 if (!ep)
216 return NULL;
217
218 ep->id = id;
219 ep->dev.class = &iscsi_endpoint_class;
220 dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
221 err = device_register(&ep->dev);
222 if (err)
223 goto free_ep;
224
225 err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
226 if (err)
227 goto unregister_dev;
228
229 if (dd_size)
230 ep->dd_data = &ep[1];
231 return ep;
232
233 unregister_dev:
234 device_unregister(&ep->dev);
235 return NULL;
236
237 free_ep:
238 kfree(ep);
239 return NULL;
240 }
241 EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
242
243 void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
244 {
245 sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
246 device_unregister(&ep->dev);
247 }
248 EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
249
250 struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
251 {
252 struct iscsi_endpoint *ep;
253 struct device *dev;
254
255 dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
256 iscsi_match_epid);
257 if (!dev)
258 return NULL;
259
260 ep = iscsi_dev_to_endpoint(dev);
261 /*
262 * we can drop this now because the interface will prevent
263 * removals and lookups from racing.
264 */
265 put_device(dev);
266 return ep;
267 }
268 EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
269
270 /*
271 * Interface to display network param to sysfs
272 */
273
274 static void iscsi_iface_release(struct device *dev)
275 {
276 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
277 struct device *parent = iface->dev.parent;
278
279 kfree(iface);
280 put_device(parent);
281 }
282
283
284 static struct class iscsi_iface_class = {
285 .name = "iscsi_iface",
286 .dev_release = iscsi_iface_release,
287 };
288
289 #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \
290 struct device_attribute dev_attr_##_prefix##_##_name = \
291 __ATTR(_name, _mode, _show, _store)
292
293 /* iface attrs show */
294 #define iscsi_iface_attr_show(type, name, param_type, param) \
295 static ssize_t \
296 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
297 char *buf) \
298 { \
299 struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \
300 struct iscsi_transport *t = iface->transport; \
301 return t->get_iface_param(iface, param_type, param, buf); \
302 } \
303
304 #define iscsi_iface_net_attr(type, name, param) \
305 iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \
306 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
307
308 #define iscsi_iface_attr(type, name, param) \
309 iscsi_iface_attr_show(type, name, ISCSI_IFACE_PARAM, param) \
310 static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
311
312 /* generic read only ipv4 attribute */
313 iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR);
314 iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW);
315 iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET);
316 iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO);
317 iscsi_iface_net_attr(ipv4_iface, dhcp_dns_address_en,
318 ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN);
319 iscsi_iface_net_attr(ipv4_iface, dhcp_slp_da_info_en,
320 ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN);
321 iscsi_iface_net_attr(ipv4_iface, tos_en, ISCSI_NET_PARAM_IPV4_TOS_EN);
322 iscsi_iface_net_attr(ipv4_iface, tos, ISCSI_NET_PARAM_IPV4_TOS);
323 iscsi_iface_net_attr(ipv4_iface, grat_arp_en,
324 ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN);
325 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id_en,
326 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN);
327 iscsi_iface_net_attr(ipv4_iface, dhcp_alt_client_id,
328 ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID);
329 iscsi_iface_net_attr(ipv4_iface, dhcp_req_vendor_id_en,
330 ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN);
331 iscsi_iface_net_attr(ipv4_iface, dhcp_use_vendor_id_en,
332 ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN);
333 iscsi_iface_net_attr(ipv4_iface, dhcp_vendor_id,
334 ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID);
335 iscsi_iface_net_attr(ipv4_iface, dhcp_learn_iqn_en,
336 ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN);
337 iscsi_iface_net_attr(ipv4_iface, fragment_disable,
338 ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE);
339 iscsi_iface_net_attr(ipv4_iface, incoming_forwarding_en,
340 ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN);
341 iscsi_iface_net_attr(ipv4_iface, ttl, ISCSI_NET_PARAM_IPV4_TTL);
342
343 /* generic read only ipv6 attribute */
344 iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);
345 iscsi_iface_net_attr(ipv6_iface, link_local_addr,
346 ISCSI_NET_PARAM_IPV6_LINKLOCAL);
347 iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER);
348 iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg,
349 ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG);
350 iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,
351 ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);
352 iscsi_iface_net_attr(ipv6_iface, link_local_state,
353 ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE);
354 iscsi_iface_net_attr(ipv6_iface, router_state,
355 ISCSI_NET_PARAM_IPV6_ROUTER_STATE);
356 iscsi_iface_net_attr(ipv6_iface, grat_neighbor_adv_en,
357 ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN);
358 iscsi_iface_net_attr(ipv6_iface, mld_en, ISCSI_NET_PARAM_IPV6_MLD_EN);
359 iscsi_iface_net_attr(ipv6_iface, flow_label, ISCSI_NET_PARAM_IPV6_FLOW_LABEL);
360 iscsi_iface_net_attr(ipv6_iface, traffic_class,
361 ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS);
362 iscsi_iface_net_attr(ipv6_iface, hop_limit, ISCSI_NET_PARAM_IPV6_HOP_LIMIT);
363 iscsi_iface_net_attr(ipv6_iface, nd_reachable_tmo,
364 ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO);
365 iscsi_iface_net_attr(ipv6_iface, nd_rexmit_time,
366 ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME);
367 iscsi_iface_net_attr(ipv6_iface, nd_stale_tmo,
368 ISCSI_NET_PARAM_IPV6_ND_STALE_TMO);
369 iscsi_iface_net_attr(ipv6_iface, dup_addr_detect_cnt,
370 ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT);
371 iscsi_iface_net_attr(ipv6_iface, router_adv_link_mtu,
372 ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU);
373
374 /* common read only iface attribute */
375 iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);
376 iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);
377 iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);
378 iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);
379 iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);
380 iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);
381 iscsi_iface_net_attr(iface, ipaddress_state, ISCSI_NET_PARAM_IPADDR_STATE);
382 iscsi_iface_net_attr(iface, delayed_ack_en, ISCSI_NET_PARAM_DELAYED_ACK_EN);
383 iscsi_iface_net_attr(iface, tcp_nagle_disable,
384 ISCSI_NET_PARAM_TCP_NAGLE_DISABLE);
385 iscsi_iface_net_attr(iface, tcp_wsf_disable, ISCSI_NET_PARAM_TCP_WSF_DISABLE);
386 iscsi_iface_net_attr(iface, tcp_wsf, ISCSI_NET_PARAM_TCP_WSF);
387 iscsi_iface_net_attr(iface, tcp_timer_scale, ISCSI_NET_PARAM_TCP_TIMER_SCALE);
388 iscsi_iface_net_attr(iface, tcp_timestamp_en, ISCSI_NET_PARAM_TCP_TIMESTAMP_EN);
389 iscsi_iface_net_attr(iface, cache_id, ISCSI_NET_PARAM_CACHE_ID);
390 iscsi_iface_net_attr(iface, redirect_en, ISCSI_NET_PARAM_REDIRECT_EN);
391
392 /* common iscsi specific settings attributes */
393 iscsi_iface_attr(iface, def_taskmgmt_tmo, ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO);
394 iscsi_iface_attr(iface, header_digest, ISCSI_IFACE_PARAM_HDRDGST_EN);
395 iscsi_iface_attr(iface, data_digest, ISCSI_IFACE_PARAM_DATADGST_EN);
396 iscsi_iface_attr(iface, immediate_data, ISCSI_IFACE_PARAM_IMM_DATA_EN);
397 iscsi_iface_attr(iface, initial_r2t, ISCSI_IFACE_PARAM_INITIAL_R2T_EN);
398 iscsi_iface_attr(iface, data_seq_in_order,
399 ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN);
400 iscsi_iface_attr(iface, data_pdu_in_order, ISCSI_IFACE_PARAM_PDU_INORDER_EN);
401 iscsi_iface_attr(iface, erl, ISCSI_IFACE_PARAM_ERL);
402 iscsi_iface_attr(iface, max_recv_dlength, ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH);
403 iscsi_iface_attr(iface, first_burst_len, ISCSI_IFACE_PARAM_FIRST_BURST);
404 iscsi_iface_attr(iface, max_outstanding_r2t, ISCSI_IFACE_PARAM_MAX_R2T);
405 iscsi_iface_attr(iface, max_burst_len, ISCSI_IFACE_PARAM_MAX_BURST);
406 iscsi_iface_attr(iface, chap_auth, ISCSI_IFACE_PARAM_CHAP_AUTH_EN);
407 iscsi_iface_attr(iface, bidi_chap, ISCSI_IFACE_PARAM_BIDI_CHAP_EN);
408 iscsi_iface_attr(iface, discovery_auth_optional,
409 ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL);
410 iscsi_iface_attr(iface, discovery_logout,
411 ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN);
412 iscsi_iface_attr(iface, strict_login_comp_en,
413 ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN);
414 iscsi_iface_attr(iface, initiator_name, ISCSI_IFACE_PARAM_INITIATOR_NAME);
415
416 static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
417 struct attribute *attr, int i)
418 {
419 struct device *dev = container_of(kobj, struct device, kobj);
420 struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
421 struct iscsi_transport *t = iface->transport;
422 int param;
423 int param_type;
424
425 if (attr == &dev_attr_iface_enabled.attr)
426 param = ISCSI_NET_PARAM_IFACE_ENABLE;
427 else if (attr == &dev_attr_iface_vlan_id.attr)
428 param = ISCSI_NET_PARAM_VLAN_ID;
429 else if (attr == &dev_attr_iface_vlan_priority.attr)
430 param = ISCSI_NET_PARAM_VLAN_PRIORITY;
431 else if (attr == &dev_attr_iface_vlan_enabled.attr)
432 param = ISCSI_NET_PARAM_VLAN_ENABLED;
433 else if (attr == &dev_attr_iface_mtu.attr)
434 param = ISCSI_NET_PARAM_MTU;
435 else if (attr == &dev_attr_iface_port.attr)
436 param = ISCSI_NET_PARAM_PORT;
437 else if (attr == &dev_attr_iface_ipaddress_state.attr)
438 param = ISCSI_NET_PARAM_IPADDR_STATE;
439 else if (attr == &dev_attr_iface_delayed_ack_en.attr)
440 param = ISCSI_NET_PARAM_DELAYED_ACK_EN;
441 else if (attr == &dev_attr_iface_tcp_nagle_disable.attr)
442 param = ISCSI_NET_PARAM_TCP_NAGLE_DISABLE;
443 else if (attr == &dev_attr_iface_tcp_wsf_disable.attr)
444 param = ISCSI_NET_PARAM_TCP_WSF_DISABLE;
445 else if (attr == &dev_attr_iface_tcp_wsf.attr)
446 param = ISCSI_NET_PARAM_TCP_WSF;
447 else if (attr == &dev_attr_iface_tcp_timer_scale.attr)
448 param = ISCSI_NET_PARAM_TCP_TIMER_SCALE;
449 else if (attr == &dev_attr_iface_tcp_timestamp_en.attr)
450 param = ISCSI_NET_PARAM_TCP_TIMESTAMP_EN;
451 else if (attr == &dev_attr_iface_cache_id.attr)
452 param = ISCSI_NET_PARAM_CACHE_ID;
453 else if (attr == &dev_attr_iface_redirect_en.attr)
454 param = ISCSI_NET_PARAM_REDIRECT_EN;
455 else if (attr == &dev_attr_iface_def_taskmgmt_tmo.attr)
456 param = ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO;
457 else if (attr == &dev_attr_iface_header_digest.attr)
458 param = ISCSI_IFACE_PARAM_HDRDGST_EN;
459 else if (attr == &dev_attr_iface_data_digest.attr)
460 param = ISCSI_IFACE_PARAM_DATADGST_EN;
461 else if (attr == &dev_attr_iface_immediate_data.attr)
462 param = ISCSI_IFACE_PARAM_IMM_DATA_EN;
463 else if (attr == &dev_attr_iface_initial_r2t.attr)
464 param = ISCSI_IFACE_PARAM_INITIAL_R2T_EN;
465 else if (attr == &dev_attr_iface_data_seq_in_order.attr)
466 param = ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN;
467 else if (attr == &dev_attr_iface_data_pdu_in_order.attr)
468 param = ISCSI_IFACE_PARAM_PDU_INORDER_EN;
469 else if (attr == &dev_attr_iface_erl.attr)
470 param = ISCSI_IFACE_PARAM_ERL;
471 else if (attr == &dev_attr_iface_max_recv_dlength.attr)
472 param = ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH;
473 else if (attr == &dev_attr_iface_first_burst_len.attr)
474 param = ISCSI_IFACE_PARAM_FIRST_BURST;
475 else if (attr == &dev_attr_iface_max_outstanding_r2t.attr)
476 param = ISCSI_IFACE_PARAM_MAX_R2T;
477 else if (attr == &dev_attr_iface_max_burst_len.attr)
478 param = ISCSI_IFACE_PARAM_MAX_BURST;
479 else if (attr == &dev_attr_iface_chap_auth.attr)
480 param = ISCSI_IFACE_PARAM_CHAP_AUTH_EN;
481 else if (attr == &dev_attr_iface_bidi_chap.attr)
482 param = ISCSI_IFACE_PARAM_BIDI_CHAP_EN;
483 else if (attr == &dev_attr_iface_discovery_auth_optional.attr)
484 param = ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL;
485 else if (attr == &dev_attr_iface_discovery_logout.attr)
486 param = ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN;
487 else if (attr == &dev_attr_iface_strict_login_comp_en.attr)
488 param = ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN;
489 else if (attr == &dev_attr_iface_initiator_name.attr)
490 param = ISCSI_IFACE_PARAM_INITIATOR_NAME;
491 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {
492 if (attr == &dev_attr_ipv4_iface_ipaddress.attr)
493 param = ISCSI_NET_PARAM_IPV4_ADDR;
494 else if (attr == &dev_attr_ipv4_iface_gateway.attr)
495 param = ISCSI_NET_PARAM_IPV4_GW;
496 else if (attr == &dev_attr_ipv4_iface_subnet.attr)
497 param = ISCSI_NET_PARAM_IPV4_SUBNET;
498 else if (attr == &dev_attr_ipv4_iface_bootproto.attr)
499 param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;
500 else if (attr ==
501 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr)
502 param = ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN;
503 else if (attr ==
504 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr)
505 param = ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN;
506 else if (attr == &dev_attr_ipv4_iface_tos_en.attr)
507 param = ISCSI_NET_PARAM_IPV4_TOS_EN;
508 else if (attr == &dev_attr_ipv4_iface_tos.attr)
509 param = ISCSI_NET_PARAM_IPV4_TOS;
510 else if (attr == &dev_attr_ipv4_iface_grat_arp_en.attr)
511 param = ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN;
512 else if (attr ==
513 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr)
514 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN;
515 else if (attr == &dev_attr_ipv4_iface_dhcp_alt_client_id.attr)
516 param = ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID;
517 else if (attr ==
518 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr)
519 param = ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN;
520 else if (attr ==
521 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr)
522 param = ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN;
523 else if (attr == &dev_attr_ipv4_iface_dhcp_vendor_id.attr)
524 param = ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID;
525 else if (attr ==
526 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr)
527 param = ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN;
528 else if (attr ==
529 &dev_attr_ipv4_iface_fragment_disable.attr)
530 param = ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE;
531 else if (attr ==
532 &dev_attr_ipv4_iface_incoming_forwarding_en.attr)
533 param = ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN;
534 else if (attr == &dev_attr_ipv4_iface_ttl.attr)
535 param = ISCSI_NET_PARAM_IPV4_TTL;
536 else
537 return 0;
538 } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {
539 if (attr == &dev_attr_ipv6_iface_ipaddress.attr)
540 param = ISCSI_NET_PARAM_IPV6_ADDR;
541 else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)
542 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;
543 else if (attr == &dev_attr_ipv6_iface_router_addr.attr)
544 param = ISCSI_NET_PARAM_IPV6_ROUTER;
545 else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)
546 param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;
547 else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)
548 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;
549 else if (attr == &dev_attr_ipv6_iface_link_local_state.attr)
550 param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE;
551 else if (attr == &dev_attr_ipv6_iface_router_state.attr)
552 param = ISCSI_NET_PARAM_IPV6_ROUTER_STATE;
553 else if (attr ==
554 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr)
555 param = ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN;
556 else if (attr == &dev_attr_ipv6_iface_mld_en.attr)
557 param = ISCSI_NET_PARAM_IPV6_MLD_EN;
558 else if (attr == &dev_attr_ipv6_iface_flow_label.attr)
559 param = ISCSI_NET_PARAM_IPV6_FLOW_LABEL;
560 else if (attr == &dev_attr_ipv6_iface_traffic_class.attr)
561 param = ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS;
562 else if (attr == &dev_attr_ipv6_iface_hop_limit.attr)
563 param = ISCSI_NET_PARAM_IPV6_HOP_LIMIT;
564 else if (attr == &dev_attr_ipv6_iface_nd_reachable_tmo.attr)
565 param = ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO;
566 else if (attr == &dev_attr_ipv6_iface_nd_rexmit_time.attr)
567 param = ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME;
568 else if (attr == &dev_attr_ipv6_iface_nd_stale_tmo.attr)
569 param = ISCSI_NET_PARAM_IPV6_ND_STALE_TMO;
570 else if (attr == &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr)
571 param = ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT;
572 else if (attr == &dev_attr_ipv6_iface_router_adv_link_mtu.attr)
573 param = ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU;
574 else
575 return 0;
576 } else {
577 WARN_ONCE(1, "Invalid iface attr");
578 return 0;
579 }
580
581 switch (param) {
582 case ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO:
583 case ISCSI_IFACE_PARAM_HDRDGST_EN:
584 case ISCSI_IFACE_PARAM_DATADGST_EN:
585 case ISCSI_IFACE_PARAM_IMM_DATA_EN:
586 case ISCSI_IFACE_PARAM_INITIAL_R2T_EN:
587 case ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN:
588 case ISCSI_IFACE_PARAM_PDU_INORDER_EN:
589 case ISCSI_IFACE_PARAM_ERL:
590 case ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH:
591 case ISCSI_IFACE_PARAM_FIRST_BURST:
592 case ISCSI_IFACE_PARAM_MAX_R2T:
593 case ISCSI_IFACE_PARAM_MAX_BURST:
594 case ISCSI_IFACE_PARAM_CHAP_AUTH_EN:
595 case ISCSI_IFACE_PARAM_BIDI_CHAP_EN:
596 case ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL:
597 case ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN:
598 case ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN:
599 case ISCSI_IFACE_PARAM_INITIATOR_NAME:
600 param_type = ISCSI_IFACE_PARAM;
601 break;
602 default:
603 param_type = ISCSI_NET_PARAM;
604 }
605
606 return t->attr_is_visible(param_type, param);
607 }
608
609 static struct attribute *iscsi_iface_attrs[] = {
610 &dev_attr_iface_enabled.attr,
611 &dev_attr_iface_vlan_id.attr,
612 &dev_attr_iface_vlan_priority.attr,
613 &dev_attr_iface_vlan_enabled.attr,
614 &dev_attr_ipv4_iface_ipaddress.attr,
615 &dev_attr_ipv4_iface_gateway.attr,
616 &dev_attr_ipv4_iface_subnet.attr,
617 &dev_attr_ipv4_iface_bootproto.attr,
618 &dev_attr_ipv6_iface_ipaddress.attr,
619 &dev_attr_ipv6_iface_link_local_addr.attr,
620 &dev_attr_ipv6_iface_router_addr.attr,
621 &dev_attr_ipv6_iface_ipaddr_autocfg.attr,
622 &dev_attr_ipv6_iface_link_local_autocfg.attr,
623 &dev_attr_iface_mtu.attr,
624 &dev_attr_iface_port.attr,
625 &dev_attr_iface_ipaddress_state.attr,
626 &dev_attr_iface_delayed_ack_en.attr,
627 &dev_attr_iface_tcp_nagle_disable.attr,
628 &dev_attr_iface_tcp_wsf_disable.attr,
629 &dev_attr_iface_tcp_wsf.attr,
630 &dev_attr_iface_tcp_timer_scale.attr,
631 &dev_attr_iface_tcp_timestamp_en.attr,
632 &dev_attr_iface_cache_id.attr,
633 &dev_attr_iface_redirect_en.attr,
634 &dev_attr_iface_def_taskmgmt_tmo.attr,
635 &dev_attr_iface_header_digest.attr,
636 &dev_attr_iface_data_digest.attr,
637 &dev_attr_iface_immediate_data.attr,
638 &dev_attr_iface_initial_r2t.attr,
639 &dev_attr_iface_data_seq_in_order.attr,
640 &dev_attr_iface_data_pdu_in_order.attr,
641 &dev_attr_iface_erl.attr,
642 &dev_attr_iface_max_recv_dlength.attr,
643 &dev_attr_iface_first_burst_len.attr,
644 &dev_attr_iface_max_outstanding_r2t.attr,
645 &dev_attr_iface_max_burst_len.attr,
646 &dev_attr_iface_chap_auth.attr,
647 &dev_attr_iface_bidi_chap.attr,
648 &dev_attr_iface_discovery_auth_optional.attr,
649 &dev_attr_iface_discovery_logout.attr,
650 &dev_attr_iface_strict_login_comp_en.attr,
651 &dev_attr_iface_initiator_name.attr,
652 &dev_attr_ipv4_iface_dhcp_dns_address_en.attr,
653 &dev_attr_ipv4_iface_dhcp_slp_da_info_en.attr,
654 &dev_attr_ipv4_iface_tos_en.attr,
655 &dev_attr_ipv4_iface_tos.attr,
656 &dev_attr_ipv4_iface_grat_arp_en.attr,
657 &dev_attr_ipv4_iface_dhcp_alt_client_id_en.attr,
658 &dev_attr_ipv4_iface_dhcp_alt_client_id.attr,
659 &dev_attr_ipv4_iface_dhcp_req_vendor_id_en.attr,
660 &dev_attr_ipv4_iface_dhcp_use_vendor_id_en.attr,
661 &dev_attr_ipv4_iface_dhcp_vendor_id.attr,
662 &dev_attr_ipv4_iface_dhcp_learn_iqn_en.attr,
663 &dev_attr_ipv4_iface_fragment_disable.attr,
664 &dev_attr_ipv4_iface_incoming_forwarding_en.attr,
665 &dev_attr_ipv4_iface_ttl.attr,
666 &dev_attr_ipv6_iface_link_local_state.attr,
667 &dev_attr_ipv6_iface_router_state.attr,
668 &dev_attr_ipv6_iface_grat_neighbor_adv_en.attr,
669 &dev_attr_ipv6_iface_mld_en.attr,
670 &dev_attr_ipv6_iface_flow_label.attr,
671 &dev_attr_ipv6_iface_traffic_class.attr,
672 &dev_attr_ipv6_iface_hop_limit.attr,
673 &dev_attr_ipv6_iface_nd_reachable_tmo.attr,
674 &dev_attr_ipv6_iface_nd_rexmit_time.attr,
675 &dev_attr_ipv6_iface_nd_stale_tmo.attr,
676 &dev_attr_ipv6_iface_dup_addr_detect_cnt.attr,
677 &dev_attr_ipv6_iface_router_adv_link_mtu.attr,
678 NULL,
679 };
680
681 static struct attribute_group iscsi_iface_group = {
682 .attrs = iscsi_iface_attrs,
683 .is_visible = iscsi_iface_attr_is_visible,
684 };
685
686 /* convert iscsi_ipaddress_state values to ascii string name */
687 static const struct {
688 enum iscsi_ipaddress_state value;
689 char *name;
690 } iscsi_ipaddress_state_names[] = {
691 {ISCSI_IPDDRESS_STATE_UNCONFIGURED, "Unconfigured" },
692 {ISCSI_IPDDRESS_STATE_ACQUIRING, "Acquiring" },
693 {ISCSI_IPDDRESS_STATE_TENTATIVE, "Tentative" },
694 {ISCSI_IPDDRESS_STATE_VALID, "Valid" },
695 {ISCSI_IPDDRESS_STATE_DISABLING, "Disabling" },
696 {ISCSI_IPDDRESS_STATE_INVALID, "Invalid" },
697 {ISCSI_IPDDRESS_STATE_DEPRECATED, "Deprecated" },
698 };
699
700 char *iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state)
701 {
702 int i;
703 char *state = NULL;
704
705 for (i = 0; i < ARRAY_SIZE(iscsi_ipaddress_state_names); i++) {
706 if (iscsi_ipaddress_state_names[i].value == port_state) {
707 state = iscsi_ipaddress_state_names[i].name;
708 break;
709 }
710 }
711 return state;
712 }
713 EXPORT_SYMBOL_GPL(iscsi_get_ipaddress_state_name);
714
715 /* convert iscsi_router_state values to ascii string name */
716 static const struct {
717 enum iscsi_router_state value;
718 char *name;
719 } iscsi_router_state_names[] = {
720 {ISCSI_ROUTER_STATE_UNKNOWN, "Unknown" },
721 {ISCSI_ROUTER_STATE_ADVERTISED, "Advertised" },
722 {ISCSI_ROUTER_STATE_MANUAL, "Manual" },
723 {ISCSI_ROUTER_STATE_STALE, "Stale" },
724 };
725
726 char *iscsi_get_router_state_name(enum iscsi_router_state router_state)
727 {
728 int i;
729 char *state = NULL;
730
731 for (i = 0; i < ARRAY_SIZE(iscsi_router_state_names); i++) {
732 if (iscsi_router_state_names[i].value == router_state) {
733 state = iscsi_router_state_names[i].name;
734 break;
735 }
736 }
737 return state;
738 }
739 EXPORT_SYMBOL_GPL(iscsi_get_router_state_name);
740
741 struct iscsi_iface *
742 iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,
743 uint32_t iface_type, uint32_t iface_num, int dd_size)
744 {
745 struct iscsi_iface *iface;
746 int err;
747
748 iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);
749 if (!iface)
750 return NULL;
751
752 iface->transport = transport;
753 iface->iface_type = iface_type;
754 iface->iface_num = iface_num;
755 iface->dev.release = iscsi_iface_release;
756 iface->dev.class = &iscsi_iface_class;
757 /* parent reference released in iscsi_iface_release */
758 iface->dev.parent = get_device(&shost->shost_gendev);
759 if (iface_type == ISCSI_IFACE_TYPE_IPV4)
760 dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no,
761 iface_num);
762 else
763 dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,
764 iface_num);
765
766 err = device_register(&iface->dev);
767 if (err)
768 goto free_iface;
769
770 err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);
771 if (err)
772 goto unreg_iface;
773
774 if (dd_size)
775 iface->dd_data = &iface[1];
776 return iface;
777
778 unreg_iface:
779 device_unregister(&iface->dev);
780 return NULL;
781
782 free_iface:
783 put_device(iface->dev.parent);
784 kfree(iface);
785 return NULL;
786 }
787 EXPORT_SYMBOL_GPL(iscsi_create_iface);
788
789 void iscsi_destroy_iface(struct iscsi_iface *iface)
790 {
791 sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);
792 device_unregister(&iface->dev);
793 }
794 EXPORT_SYMBOL_GPL(iscsi_destroy_iface);
795
796 /*
797 * Interface to display flash node params to sysfs
798 */
799
800 #define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \
801 struct device_attribute dev_attr_##_prefix##_##_name = \
802 __ATTR(_name, _mode, _show, _store)
803
804 /* flash node session attrs show */
805 #define iscsi_flashnode_sess_attr_show(type, name, param) \
806 static ssize_t \
807 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
808 char *buf) \
809 { \
810 struct iscsi_bus_flash_session *fnode_sess = \
811 iscsi_dev_to_flash_session(dev);\
812 struct iscsi_transport *t = fnode_sess->transport; \
813 return t->get_flashnode_param(fnode_sess, param, buf); \
814 } \
815
816
817 #define iscsi_flashnode_sess_attr(type, name, param) \
818 iscsi_flashnode_sess_attr_show(type, name, param) \
819 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
820 show_##type##_##name, NULL);
821
822 /* Flash node session attributes */
823
824 iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable,
825 ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE);
826 iscsi_flashnode_sess_attr(fnode, discovery_session,
827 ISCSI_FLASHNODE_DISCOVERY_SESS);
828 iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE);
829 iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN);
830 iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN);
831 iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN);
832 iscsi_flashnode_sess_attr(fnode, data_seq_in_order,
833 ISCSI_FLASHNODE_DATASEQ_INORDER);
834 iscsi_flashnode_sess_attr(fnode, data_pdu_in_order,
835 ISCSI_FLASHNODE_PDU_INORDER);
836 iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN);
837 iscsi_flashnode_sess_attr(fnode, discovery_logout,
838 ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN);
839 iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN);
840 iscsi_flashnode_sess_attr(fnode, discovery_auth_optional,
841 ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL);
842 iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL);
843 iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST);
844 iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT);
845 iscsi_flashnode_sess_attr(fnode, def_time2retain,
846 ISCSI_FLASHNODE_DEF_TIME2RETAIN);
847 iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T);
848 iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID);
849 iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID);
850 iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST);
851 iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo,
852 ISCSI_FLASHNODE_DEF_TASKMGMT_TMO);
853 iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS);
854 iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME);
855 iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT);
856 iscsi_flashnode_sess_attr(fnode, discovery_parent_idx,
857 ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX);
858 iscsi_flashnode_sess_attr(fnode, discovery_parent_type,
859 ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE);
860 iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX);
861 iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX);
862 iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME);
863 iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN);
864 iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD);
865 iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN);
866 iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT);
867
868 static struct attribute *iscsi_flashnode_sess_attrs[] = {
869 &dev_attr_fnode_auto_snd_tgt_disable.attr,
870 &dev_attr_fnode_discovery_session.attr,
871 &dev_attr_fnode_portal_type.attr,
872 &dev_attr_fnode_entry_enable.attr,
873 &dev_attr_fnode_immediate_data.attr,
874 &dev_attr_fnode_initial_r2t.attr,
875 &dev_attr_fnode_data_seq_in_order.attr,
876 &dev_attr_fnode_data_pdu_in_order.attr,
877 &dev_attr_fnode_chap_auth.attr,
878 &dev_attr_fnode_discovery_logout.attr,
879 &dev_attr_fnode_bidi_chap.attr,
880 &dev_attr_fnode_discovery_auth_optional.attr,
881 &dev_attr_fnode_erl.attr,
882 &dev_attr_fnode_first_burst_len.attr,
883 &dev_attr_fnode_def_time2wait.attr,
884 &dev_attr_fnode_def_time2retain.attr,
885 &dev_attr_fnode_max_outstanding_r2t.attr,
886 &dev_attr_fnode_isid.attr,
887 &dev_attr_fnode_tsid.attr,
888 &dev_attr_fnode_max_burst_len.attr,
889 &dev_attr_fnode_def_taskmgmt_tmo.attr,
890 &dev_attr_fnode_targetalias.attr,
891 &dev_attr_fnode_targetname.attr,
892 &dev_attr_fnode_tpgt.attr,
893 &dev_attr_fnode_discovery_parent_idx.attr,
894 &dev_attr_fnode_discovery_parent_type.attr,
895 &dev_attr_fnode_chap_in_idx.attr,
896 &dev_attr_fnode_chap_out_idx.attr,
897 &dev_attr_fnode_username.attr,
898 &dev_attr_fnode_username_in.attr,
899 &dev_attr_fnode_password.attr,
900 &dev_attr_fnode_password_in.attr,
901 &dev_attr_fnode_is_boot_target.attr,
902 NULL,
903 };
904
905 static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,
906 struct attribute *attr,
907 int i)
908 {
909 struct device *dev = container_of(kobj, struct device, kobj);
910 struct iscsi_bus_flash_session *fnode_sess =
911 iscsi_dev_to_flash_session(dev);
912 struct iscsi_transport *t = fnode_sess->transport;
913 int param;
914
915 if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) {
916 param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE;
917 } else if (attr == &dev_attr_fnode_discovery_session.attr) {
918 param = ISCSI_FLASHNODE_DISCOVERY_SESS;
919 } else if (attr == &dev_attr_fnode_portal_type.attr) {
920 param = ISCSI_FLASHNODE_PORTAL_TYPE;
921 } else if (attr == &dev_attr_fnode_entry_enable.attr) {
922 param = ISCSI_FLASHNODE_ENTRY_EN;
923 } else if (attr == &dev_attr_fnode_immediate_data.attr) {
924 param = ISCSI_FLASHNODE_IMM_DATA_EN;
925 } else if (attr == &dev_attr_fnode_initial_r2t.attr) {
926 param = ISCSI_FLASHNODE_INITIAL_R2T_EN;
927 } else if (attr == &dev_attr_fnode_data_seq_in_order.attr) {
928 param = ISCSI_FLASHNODE_DATASEQ_INORDER;
929 } else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) {
930 param = ISCSI_FLASHNODE_PDU_INORDER;
931 } else if (attr == &dev_attr_fnode_chap_auth.attr) {
932 param = ISCSI_FLASHNODE_CHAP_AUTH_EN;
933 } else if (attr == &dev_attr_fnode_discovery_logout.attr) {
934 param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN;
935 } else if (attr == &dev_attr_fnode_bidi_chap.attr) {
936 param = ISCSI_FLASHNODE_BIDI_CHAP_EN;
937 } else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) {
938 param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL;
939 } else if (attr == &dev_attr_fnode_erl.attr) {
940 param = ISCSI_FLASHNODE_ERL;
941 } else if (attr == &dev_attr_fnode_first_burst_len.attr) {
942 param = ISCSI_FLASHNODE_FIRST_BURST;
943 } else if (attr == &dev_attr_fnode_def_time2wait.attr) {
944 param = ISCSI_FLASHNODE_DEF_TIME2WAIT;
945 } else if (attr == &dev_attr_fnode_def_time2retain.attr) {
946 param = ISCSI_FLASHNODE_DEF_TIME2RETAIN;
947 } else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) {
948 param = ISCSI_FLASHNODE_MAX_R2T;
949 } else if (attr == &dev_attr_fnode_isid.attr) {
950 param = ISCSI_FLASHNODE_ISID;
951 } else if (attr == &dev_attr_fnode_tsid.attr) {
952 param = ISCSI_FLASHNODE_TSID;
953 } else if (attr == &dev_attr_fnode_max_burst_len.attr) {
954 param = ISCSI_FLASHNODE_MAX_BURST;
955 } else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) {
956 param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO;
957 } else if (attr == &dev_attr_fnode_targetalias.attr) {
958 param = ISCSI_FLASHNODE_ALIAS;
959 } else if (attr == &dev_attr_fnode_targetname.attr) {
960 param = ISCSI_FLASHNODE_NAME;
961 } else if (attr == &dev_attr_fnode_tpgt.attr) {
962 param = ISCSI_FLASHNODE_TPGT;
963 } else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) {
964 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX;
965 } else if (attr == &dev_attr_fnode_discovery_parent_type.attr) {
966 param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE;
967 } else if (attr == &dev_attr_fnode_chap_in_idx.attr) {
968 param = ISCSI_FLASHNODE_CHAP_IN_IDX;
969 } else if (attr == &dev_attr_fnode_chap_out_idx.attr) {
970 param = ISCSI_FLASHNODE_CHAP_OUT_IDX;
971 } else if (attr == &dev_attr_fnode_username.attr) {
972 param = ISCSI_FLASHNODE_USERNAME;
973 } else if (attr == &dev_attr_fnode_username_in.attr) {
974 param = ISCSI_FLASHNODE_USERNAME_IN;
975 } else if (attr == &dev_attr_fnode_password.attr) {
976 param = ISCSI_FLASHNODE_PASSWORD;
977 } else if (attr == &dev_attr_fnode_password_in.attr) {
978 param = ISCSI_FLASHNODE_PASSWORD_IN;
979 } else if (attr == &dev_attr_fnode_is_boot_target.attr) {
980 param = ISCSI_FLASHNODE_IS_BOOT_TGT;
981 } else {
982 WARN_ONCE(1, "Invalid flashnode session attr");
983 return 0;
984 }
985
986 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
987 }
988
989 static struct attribute_group iscsi_flashnode_sess_attr_group = {
990 .attrs = iscsi_flashnode_sess_attrs,
991 .is_visible = iscsi_flashnode_sess_attr_is_visible,
992 };
993
994 static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {
995 &iscsi_flashnode_sess_attr_group,
996 NULL,
997 };
998
999 static void iscsi_flashnode_sess_release(struct device *dev)
1000 {
1001 struct iscsi_bus_flash_session *fnode_sess =
1002 iscsi_dev_to_flash_session(dev);
1003
1004 kfree(fnode_sess->targetname);
1005 kfree(fnode_sess->targetalias);
1006 kfree(fnode_sess->portal_type);
1007 kfree(fnode_sess);
1008 }
1009
1010 struct device_type iscsi_flashnode_sess_dev_type = {
1011 .name = "iscsi_flashnode_sess_dev_type",
1012 .groups = iscsi_flashnode_sess_attr_groups,
1013 .release = iscsi_flashnode_sess_release,
1014 };
1015
1016 /* flash node connection attrs show */
1017 #define iscsi_flashnode_conn_attr_show(type, name, param) \
1018 static ssize_t \
1019 show_##type##_##name(struct device *dev, struct device_attribute *attr, \
1020 char *buf) \
1021 { \
1022 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\
1023 struct iscsi_bus_flash_session *fnode_sess = \
1024 iscsi_flash_conn_to_flash_session(fnode_conn);\
1025 struct iscsi_transport *t = fnode_conn->transport; \
1026 return t->get_flashnode_param(fnode_sess, param, buf); \
1027 } \
1028
1029
1030 #define iscsi_flashnode_conn_attr(type, name, param) \
1031 iscsi_flashnode_conn_attr_show(type, name, param) \
1032 static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
1033 show_##type##_##name, NULL);
1034
1035 /* Flash node connection attributes */
1036
1037 iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,
1038 ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);
1039 iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);
1040 iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);
1041 iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);
1042 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,
1043 ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);
1044 iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,
1045 ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);
1046 iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,
1047 ISCSI_FLASHNODE_TCP_WSF_DISABLE);
1048 iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,
1049 ISCSI_FLASHNODE_TCP_TIMER_SCALE);
1050 iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,
1051 ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);
1052 iscsi_flashnode_conn_attr(fnode, fragment_disable,
1053 ISCSI_FLASHNODE_IP_FRAG_DISABLE);
1054 iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);
1055 iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);
1056 iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);
1057 iscsi_flashnode_conn_attr(fnode, max_recv_dlength,
1058 ISCSI_FLASHNODE_MAX_RECV_DLENGTH);
1059 iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,
1060 ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);
1061 iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);
1062 iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);
1063 iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);
1064 iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,
1065 ISCSI_FLASHNODE_IPV6_FLOW_LABEL);
1066 iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,
1067 ISCSI_FLASHNODE_REDIRECT_IPADDR);
1068 iscsi_flashnode_conn_attr(fnode, max_segment_size,
1069 ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);
1070 iscsi_flashnode_conn_attr(fnode, link_local_ipv6,
1071 ISCSI_FLASHNODE_LINK_LOCAL_IPV6);
1072 iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);
1073 iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);
1074 iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);
1075 iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);
1076
1077 static struct attribute *iscsi_flashnode_conn_attrs[] = {
1078 &dev_attr_fnode_is_fw_assigned_ipv6.attr,
1079 &dev_attr_fnode_header_digest.attr,
1080 &dev_attr_fnode_data_digest.attr,
1081 &dev_attr_fnode_snack_req.attr,
1082 &dev_attr_fnode_tcp_timestamp_stat.attr,
1083 &dev_attr_fnode_tcp_nagle_disable.attr,
1084 &dev_attr_fnode_tcp_wsf_disable.attr,
1085 &dev_attr_fnode_tcp_timer_scale.attr,
1086 &dev_attr_fnode_tcp_timestamp_enable.attr,
1087 &dev_attr_fnode_fragment_disable.attr,
1088 &dev_attr_fnode_max_recv_dlength.attr,
1089 &dev_attr_fnode_max_xmit_dlength.attr,
1090 &dev_attr_fnode_keepalive_tmo.attr,
1091 &dev_attr_fnode_port.attr,
1092 &dev_attr_fnode_ipaddress.attr,
1093 &dev_attr_fnode_redirect_ipaddr.attr,
1094 &dev_attr_fnode_max_segment_size.attr,
1095 &dev_attr_fnode_local_port.attr,
1096 &dev_attr_fnode_ipv4_tos.attr,
1097 &dev_attr_fnode_ipv6_traffic_class.attr,
1098 &dev_attr_fnode_ipv6_flow_label.attr,
1099 &dev_attr_fnode_link_local_ipv6.attr,
1100 &dev_attr_fnode_tcp_xmit_wsf.attr,
1101 &dev_attr_fnode_tcp_recv_wsf.attr,
1102 &dev_attr_fnode_statsn.attr,
1103 &dev_attr_fnode_exp_statsn.attr,
1104 NULL,
1105 };
1106
1107 static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
1108 struct attribute *attr,
1109 int i)
1110 {
1111 struct device *dev = container_of(kobj, struct device, kobj);
1112 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1113 struct iscsi_transport *t = fnode_conn->transport;
1114 int param;
1115
1116 if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {
1117 param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;
1118 } else if (attr == &dev_attr_fnode_header_digest.attr) {
1119 param = ISCSI_FLASHNODE_HDR_DGST_EN;
1120 } else if (attr == &dev_attr_fnode_data_digest.attr) {
1121 param = ISCSI_FLASHNODE_DATA_DGST_EN;
1122 } else if (attr == &dev_attr_fnode_snack_req.attr) {
1123 param = ISCSI_FLASHNODE_SNACK_REQ_EN;
1124 } else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {
1125 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;
1126 } else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {
1127 param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;
1128 } else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {
1129 param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;
1130 } else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {
1131 param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;
1132 } else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {
1133 param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;
1134 } else if (attr == &dev_attr_fnode_fragment_disable.attr) {
1135 param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;
1136 } else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {
1137 param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;
1138 } else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {
1139 param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;
1140 } else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {
1141 param = ISCSI_FLASHNODE_KEEPALIVE_TMO;
1142 } else if (attr == &dev_attr_fnode_port.attr) {
1143 param = ISCSI_FLASHNODE_PORT;
1144 } else if (attr == &dev_attr_fnode_ipaddress.attr) {
1145 param = ISCSI_FLASHNODE_IPADDR;
1146 } else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {
1147 param = ISCSI_FLASHNODE_REDIRECT_IPADDR;
1148 } else if (attr == &dev_attr_fnode_max_segment_size.attr) {
1149 param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;
1150 } else if (attr == &dev_attr_fnode_local_port.attr) {
1151 param = ISCSI_FLASHNODE_LOCAL_PORT;
1152 } else if (attr == &dev_attr_fnode_ipv4_tos.attr) {
1153 param = ISCSI_FLASHNODE_IPV4_TOS;
1154 } else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {
1155 param = ISCSI_FLASHNODE_IPV6_TC;
1156 } else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {
1157 param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;
1158 } else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {
1159 param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;
1160 } else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {
1161 param = ISCSI_FLASHNODE_TCP_XMIT_WSF;
1162 } else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {
1163 param = ISCSI_FLASHNODE_TCP_RECV_WSF;
1164 } else if (attr == &dev_attr_fnode_statsn.attr) {
1165 param = ISCSI_FLASHNODE_STATSN;
1166 } else if (attr == &dev_attr_fnode_exp_statsn.attr) {
1167 param = ISCSI_FLASHNODE_EXP_STATSN;
1168 } else {
1169 WARN_ONCE(1, "Invalid flashnode connection attr");
1170 return 0;
1171 }
1172
1173 return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
1174 }
1175
1176 static struct attribute_group iscsi_flashnode_conn_attr_group = {
1177 .attrs = iscsi_flashnode_conn_attrs,
1178 .is_visible = iscsi_flashnode_conn_attr_is_visible,
1179 };
1180
1181 static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
1182 &iscsi_flashnode_conn_attr_group,
1183 NULL,
1184 };
1185
1186 static void iscsi_flashnode_conn_release(struct device *dev)
1187 {
1188 struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
1189
1190 kfree(fnode_conn->ipaddress);
1191 kfree(fnode_conn->redirect_ipaddr);
1192 kfree(fnode_conn->link_local_ipv6_addr);
1193 kfree(fnode_conn);
1194 }
1195
1196 struct device_type iscsi_flashnode_conn_dev_type = {
1197 .name = "iscsi_flashnode_conn_dev_type",
1198 .groups = iscsi_flashnode_conn_attr_groups,
1199 .release = iscsi_flashnode_conn_release,
1200 };
1201
1202 struct bus_type iscsi_flashnode_bus;
1203
1204 int iscsi_flashnode_bus_match(struct device *dev,
1205 struct device_driver *drv)
1206 {
1207 if (dev->bus == &iscsi_flashnode_bus)
1208 return 1;
1209 return 0;
1210 }
1211 EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);
1212
1213 struct bus_type iscsi_flashnode_bus = {
1214 .name = "iscsi_flashnode",
1215 .match = &iscsi_flashnode_bus_match,
1216 };
1217
1218 /**
1219 * iscsi_create_flashnode_sess - Add flashnode session entry in sysfs
1220 * @shost: pointer to host data
1221 * @index: index of flashnode to add in sysfs
1222 * @transport: pointer to transport data
1223 * @dd_size: total size to allocate
1224 *
1225 * Adds a sysfs entry for the flashnode session attributes
1226 *
1227 * Returns:
1228 * pointer to allocated flashnode sess on success
1229 * %NULL on failure
1230 */
1231 struct iscsi_bus_flash_session *
1232 iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,
1233 struct iscsi_transport *transport,
1234 int dd_size)
1235 {
1236 struct iscsi_bus_flash_session *fnode_sess;
1237 int err;
1238
1239 fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);
1240 if (!fnode_sess)
1241 return NULL;
1242
1243 fnode_sess->transport = transport;
1244 fnode_sess->target_id = index;
1245 fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type;
1246 fnode_sess->dev.bus = &iscsi_flashnode_bus;
1247 fnode_sess->dev.parent = &shost->shost_gendev;
1248 dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u",
1249 shost->host_no, index);
1250
1251 err = device_register(&fnode_sess->dev);
1252 if (err)
1253 goto free_fnode_sess;
1254
1255 if (dd_size)
1256 fnode_sess->dd_data = &fnode_sess[1];
1257
1258 return fnode_sess;
1259
1260 free_fnode_sess:
1261 kfree(fnode_sess);
1262 return NULL;
1263 }
1264 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);
1265
1266 /**
1267 * iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs
1268 * @shost: pointer to host data
1269 * @fnode_sess: pointer to the parent flashnode session entry
1270 * @transport: pointer to transport data
1271 * @dd_size: total size to allocate
1272 *
1273 * Adds a sysfs entry for the flashnode connection attributes
1274 *
1275 * Returns:
1276 * pointer to allocated flashnode conn on success
1277 * %NULL on failure
1278 */
1279 struct iscsi_bus_flash_conn *
1280 iscsi_create_flashnode_conn(struct Scsi_Host *shost,
1281 struct iscsi_bus_flash_session *fnode_sess,
1282 struct iscsi_transport *transport,
1283 int dd_size)
1284 {
1285 struct iscsi_bus_flash_conn *fnode_conn;
1286 int err;
1287
1288 fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);
1289 if (!fnode_conn)
1290 return NULL;
1291
1292 fnode_conn->transport = transport;
1293 fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type;
1294 fnode_conn->dev.bus = &iscsi_flashnode_bus;
1295 fnode_conn->dev.parent = &fnode_sess->dev;
1296 dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0",
1297 shost->host_no, fnode_sess->target_id);
1298
1299 err = device_register(&fnode_conn->dev);
1300 if (err)
1301 goto free_fnode_conn;
1302
1303 if (dd_size)
1304 fnode_conn->dd_data = &fnode_conn[1];
1305
1306 return fnode_conn;
1307
1308 free_fnode_conn:
1309 kfree(fnode_conn);
1310 return NULL;
1311 }
1312 EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);
1313
1314 /**
1315 * iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn
1316 * @dev: device to verify
1317 * @data: pointer to data containing value to use for verification
1318 *
1319 * Verifies if the passed device is flashnode conn device
1320 *
1321 * Returns:
1322 * 1 on success
1323 * 0 on failure
1324 */
1325 int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
1326 {
1327 return dev->bus == &iscsi_flashnode_bus;
1328 }
1329 EXPORT_SYMBOL_GPL(iscsi_is_flashnode_conn_dev);
1330
1331 static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
1332 {
1333 device_unregister(&fnode_conn->dev);
1334 return 0;
1335 }
1336
1337 static int flashnode_match_index(struct device *dev, void *data)
1338 {
1339 struct iscsi_bus_flash_session *fnode_sess = NULL;
1340 int ret = 0;
1341
1342 if (!iscsi_flashnode_bus_match(dev, NULL))
1343 goto exit_match_index;
1344
1345 fnode_sess = iscsi_dev_to_flash_session(dev);
1346 ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;
1347
1348 exit_match_index:
1349 return ret;
1350 }
1351
1352 /**
1353 * iscsi_get_flashnode_by_index -finds flashnode session entry by index
1354 * @shost: pointer to host data
1355 * @idx: index to match
1356 *
1357 * Finds the flashnode session object for the passed index
1358 *
1359 * Returns:
1360 * pointer to found flashnode session object on success
1361 * %NULL on failure
1362 */
1363 static struct iscsi_bus_flash_session *
1364 iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
1365 {
1366 struct iscsi_bus_flash_session *fnode_sess = NULL;
1367 struct device *dev;
1368
1369 dev = device_find_child(&shost->shost_gendev, &idx,
1370 flashnode_match_index);
1371 if (dev)
1372 fnode_sess = iscsi_dev_to_flash_session(dev);
1373
1374 return fnode_sess;
1375 }
1376
1377 /**
1378 * iscsi_find_flashnode_sess - finds flashnode session entry
1379 * @shost: pointer to host data
1380 * @data: pointer to data containing value to use for comparison
1381 * @fn: function pointer that does actual comparison
1382 *
1383 * Finds the flashnode session object comparing the data passed using logic
1384 * defined in passed function pointer
1385 *
1386 * Returns:
1387 * pointer to found flashnode session device object on success
1388 * %NULL on failure
1389 */
1390 struct device *
1391 iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
1392 int (*fn)(struct device *dev, void *data))
1393 {
1394 return device_find_child(&shost->shost_gendev, data, fn);
1395 }
1396 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
1397
1398 /**
1399 * iscsi_find_flashnode_conn - finds flashnode connection entry
1400 * @fnode_sess: pointer to parent flashnode session entry
1401 *
1402 * Finds the flashnode connection object comparing the data passed using logic
1403 * defined in passed function pointer
1404 *
1405 * Returns:
1406 * pointer to found flashnode connection device object on success
1407 * %NULL on failure
1408 */
1409 struct device *
1410 iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
1411 {
1412 return device_find_child(&fnode_sess->dev, NULL,
1413 iscsi_is_flashnode_conn_dev);
1414 }
1415 EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
1416
1417 static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
1418 {
1419 if (!iscsi_is_flashnode_conn_dev(dev, NULL))
1420 return 0;
1421
1422 return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
1423 }
1424
1425 /**
1426 * iscsi_destroy_flashnode_sess - destroy flashnode session entry
1427 * @fnode_sess: pointer to flashnode session entry to be destroyed
1428 *
1429 * Deletes the flashnode session entry and all children flashnode connection
1430 * entries from sysfs
1431 */
1432 void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
1433 {
1434 int err;
1435
1436 err = device_for_each_child(&fnode_sess->dev, NULL,
1437 iscsi_iter_destroy_flashnode_conn_fn);
1438 if (err)
1439 pr_err("Could not delete all connections for %s. Error %d.\n",
1440 fnode_sess->dev.kobj.name, err);
1441
1442 device_unregister(&fnode_sess->dev);
1443 }
1444 EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
1445
1446 static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
1447 {
1448 if (!iscsi_flashnode_bus_match(dev, NULL))
1449 return 0;
1450
1451 iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
1452 return 0;
1453 }
1454
1455 /**
1456 * iscsi_destroy_all_flashnode - destroy all flashnode session entries
1457 * @shost: pointer to host data
1458 *
1459 * Destroys all the flashnode session entries and all corresponding children
1460 * flashnode connection entries from sysfs
1461 */
1462 void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
1463 {
1464 device_for_each_child(&shost->shost_gendev, NULL,
1465 iscsi_iter_destroy_flashnode_fn);
1466 }
1467 EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
1468
1469 /*
1470 * BSG support
1471 */
1472 /**
1473 * iscsi_bsg_host_dispatch - Dispatch command to LLD.
1474 * @job: bsg job to be processed
1475 */
1476 static int iscsi_bsg_host_dispatch(struct bsg_job *job)
1477 {
1478 struct Scsi_Host *shost = iscsi_job_to_shost(job);
1479 struct iscsi_bsg_request *req = job->request;
1480 struct iscsi_bsg_reply *reply = job->reply;
1481 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1482 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
1483 int ret;
1484
1485 /* check if we have the msgcode value at least */
1486 if (job->request_len < sizeof(uint32_t)) {
1487 ret = -ENOMSG;
1488 goto fail_host_msg;
1489 }
1490
1491 /* Validate the host command */
1492 switch (req->msgcode) {
1493 case ISCSI_BSG_HST_VENDOR:
1494 cmdlen += sizeof(struct iscsi_bsg_host_vendor);
1495 if ((shost->hostt->vendor_id == 0L) ||
1496 (req->rqst_data.h_vendor.vendor_id !=
1497 shost->hostt->vendor_id)) {
1498 ret = -ESRCH;
1499 goto fail_host_msg;
1500 }
1501 break;
1502 default:
1503 ret = -EBADR;
1504 goto fail_host_msg;
1505 }
1506
1507 /* check if we really have all the request data needed */
1508 if (job->request_len < cmdlen) {
1509 ret = -ENOMSG;
1510 goto fail_host_msg;
1511 }
1512
1513 ret = i->iscsi_transport->bsg_request(job);
1514 if (!ret)
1515 return 0;
1516
1517 fail_host_msg:
1518 /* return the errno failure code as the only status */
1519 BUG_ON(job->reply_len < sizeof(uint32_t));
1520 reply->reply_payload_rcv_len = 0;
1521 reply->result = ret;
1522 job->reply_len = sizeof(uint32_t);
1523 bsg_job_done(job, ret, 0);
1524 return 0;
1525 }
1526
1527 /**
1528 * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests
1529 * @shost: shost for iscsi_host
1530 * @ihost: iscsi_cls_host adding the structures to
1531 */
1532 static int
1533 iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
1534 {
1535 struct device *dev = &shost->shost_gendev;
1536 struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
1537 struct request_queue *q;
1538 char bsg_name[20];
1539 int ret;
1540
1541 if (!i->iscsi_transport->bsg_request)
1542 return -ENOTSUPP;
1543
1544 snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
1545
1546 q = __scsi_alloc_queue(shost, bsg_request_fn);
1547 if (!q)
1548 return -ENOMEM;
1549
1550 ret = bsg_setup_queue(dev, q, bsg_name, iscsi_bsg_host_dispatch, 0);
1551 if (ret) {
1552 shost_printk(KERN_ERR, shost, "bsg interface failed to "
1553 "initialize - no request queue\n");
1554 blk_cleanup_queue(q);
1555 return ret;
1556 }
1557
1558 ihost->bsg_q = q;
1559 return 0;
1560 }
1561
1562 static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
1563 struct device *cdev)
1564 {
1565 struct Scsi_Host *shost = dev_to_shost(dev);
1566 struct iscsi_cls_host *ihost = shost->shost_data;
1567
1568 memset(ihost, 0, sizeof(*ihost));
1569 atomic_set(&ihost->nr_scans, 0);
1570 mutex_init(&ihost->mutex);
1571
1572 iscsi_bsg_host_add(shost, ihost);
1573 /* ignore any bsg add error - we just can't do sgio */
1574
1575 return 0;
1576 }
1577
1578 static int iscsi_remove_host(struct transport_container *tc,
1579 struct device *dev, struct device *cdev)
1580 {
1581 struct Scsi_Host *shost = dev_to_shost(dev);
1582 struct iscsi_cls_host *ihost = shost->shost_data;
1583
1584 if (ihost->bsg_q) {
1585 bsg_unregister_queue(ihost->bsg_q);
1586 blk_cleanup_queue(ihost->bsg_q);
1587 }
1588 return 0;
1589 }
1590
1591 static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
1592 "iscsi_host",
1593 iscsi_setup_host,
1594 iscsi_remove_host,
1595 NULL);
1596
1597 static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
1598 "iscsi_session",
1599 NULL,
1600 NULL,
1601 NULL);
1602
1603 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
1604 "iscsi_connection",
1605 NULL,
1606 NULL,
1607 NULL);
1608
1609 static struct sock *nls;
1610 static DEFINE_MUTEX(rx_queue_mutex);
1611
1612 static LIST_HEAD(sesslist);
1613 static DEFINE_SPINLOCK(sesslock);
1614 static LIST_HEAD(connlist);
1615 static DEFINE_SPINLOCK(connlock);
1616
1617 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
1618 {
1619 struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
1620 return sess->sid;
1621 }
1622
1623 /*
1624 * Returns the matching session to a given sid
1625 */
1626 static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
1627 {
1628 unsigned long flags;
1629 struct iscsi_cls_session *sess;
1630
1631 spin_lock_irqsave(&sesslock, flags);
1632 list_for_each_entry(sess, &sesslist, sess_list) {
1633 if (sess->sid == sid) {
1634 spin_unlock_irqrestore(&sesslock, flags);
1635 return sess;
1636 }
1637 }
1638 spin_unlock_irqrestore(&sesslock, flags);
1639 return NULL;
1640 }
1641
1642 /*
1643 * Returns the matching connection to a given sid / cid tuple
1644 */
1645 static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
1646 {
1647 unsigned long flags;
1648 struct iscsi_cls_conn *conn;
1649
1650 spin_lock_irqsave(&connlock, flags);
1651 list_for_each_entry(conn, &connlist, conn_list) {
1652 if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
1653 spin_unlock_irqrestore(&connlock, flags);
1654 return conn;
1655 }
1656 }
1657 spin_unlock_irqrestore(&connlock, flags);
1658 return NULL;
1659 }
1660
1661 /*
1662 * The following functions can be used by LLDs that allocate
1663 * their own scsi_hosts or by software iscsi LLDs
1664 */
1665 static struct {
1666 int value;
1667 char *name;
1668 } iscsi_session_state_names[] = {
1669 { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
1670 { ISCSI_SESSION_FAILED, "FAILED" },
1671 { ISCSI_SESSION_FREE, "FREE" },
1672 };
1673
1674 static const char *iscsi_session_state_name(int state)
1675 {
1676 int i;
1677 char *name = NULL;
1678
1679 for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
1680 if (iscsi_session_state_names[i].value == state) {
1681 name = iscsi_session_state_names[i].name;
1682 break;
1683 }
1684 }
1685 return name;
1686 }
1687
1688 int iscsi_session_chkready(struct iscsi_cls_session *session)
1689 {
1690 unsigned long flags;
1691 int err;
1692
1693 spin_lock_irqsave(&session->lock, flags);
1694 switch (session->state) {
1695 case ISCSI_SESSION_LOGGED_IN:
1696 err = 0;
1697 break;
1698 case ISCSI_SESSION_FAILED:
1699 err = DID_IMM_RETRY << 16;
1700 break;
1701 case ISCSI_SESSION_FREE:
1702 err = DID_TRANSPORT_FAILFAST << 16;
1703 break;
1704 default:
1705 err = DID_NO_CONNECT << 16;
1706 break;
1707 }
1708 spin_unlock_irqrestore(&session->lock, flags);
1709 return err;
1710 }
1711 EXPORT_SYMBOL_GPL(iscsi_session_chkready);
1712
1713 int iscsi_is_session_online(struct iscsi_cls_session *session)
1714 {
1715 unsigned long flags;
1716 int ret = 0;
1717
1718 spin_lock_irqsave(&session->lock, flags);
1719 if (session->state == ISCSI_SESSION_LOGGED_IN)
1720 ret = 1;
1721 spin_unlock_irqrestore(&session->lock, flags);
1722 return ret;
1723 }
1724 EXPORT_SYMBOL_GPL(iscsi_is_session_online);
1725
1726 static void iscsi_session_release(struct device *dev)
1727 {
1728 struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
1729 struct Scsi_Host *shost;
1730
1731 shost = iscsi_session_to_shost(session);
1732 scsi_host_put(shost);
1733 ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
1734 kfree(session);
1735 }
1736
1737 int iscsi_is_session_dev(const struct device *dev)
1738 {
1739 return dev->release == iscsi_session_release;
1740 }
1741 EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
1742
1743 static int iscsi_iter_session_fn(struct device *dev, void *data)
1744 {
1745 void (* fn) (struct iscsi_cls_session *) = data;
1746
1747 if (!iscsi_is_session_dev(dev))
1748 return 0;
1749 fn(iscsi_dev_to_session(dev));
1750 return 0;
1751 }
1752
1753 void iscsi_host_for_each_session(struct Scsi_Host *shost,
1754 void (*fn)(struct iscsi_cls_session *))
1755 {
1756 device_for_each_child(&shost->shost_gendev, fn,
1757 iscsi_iter_session_fn);
1758 }
1759 EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
1760
1761 /**
1762 * iscsi_scan_finished - helper to report when running scans are done
1763 * @shost: scsi host
1764 * @time: scan run time
1765 *
1766 * This function can be used by drives like qla4xxx to report to the scsi
1767 * layer when the scans it kicked off at module load time are done.
1768 */
1769 int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
1770 {
1771 struct iscsi_cls_host *ihost = shost->shost_data;
1772 /*
1773 * qla4xxx will have kicked off some session unblocks before calling
1774 * scsi_scan_host, so just wait for them to complete.
1775 */
1776 return !atomic_read(&ihost->nr_scans);
1777 }
1778 EXPORT_SYMBOL_GPL(iscsi_scan_finished);
1779
1780 struct iscsi_scan_data {
1781 unsigned int channel;
1782 unsigned int id;
1783 u64 lun;
1784 };
1785
1786 static int iscsi_user_scan_session(struct device *dev, void *data)
1787 {
1788 struct iscsi_scan_data *scan_data = data;
1789 struct iscsi_cls_session *session;
1790 struct Scsi_Host *shost;
1791 struct iscsi_cls_host *ihost;
1792 unsigned long flags;
1793 unsigned int id;
1794
1795 if (!iscsi_is_session_dev(dev))
1796 return 0;
1797
1798 session = iscsi_dev_to_session(dev);
1799
1800 ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
1801
1802 shost = iscsi_session_to_shost(session);
1803 ihost = shost->shost_data;
1804
1805 mutex_lock(&ihost->mutex);
1806 spin_lock_irqsave(&session->lock, flags);
1807 if (session->state != ISCSI_SESSION_LOGGED_IN) {
1808 spin_unlock_irqrestore(&session->lock, flags);
1809 goto user_scan_exit;
1810 }
1811 id = session->target_id;
1812 spin_unlock_irqrestore(&session->lock, flags);
1813
1814 if (id != ISCSI_MAX_TARGET) {
1815 if ((scan_data->channel == SCAN_WILD_CARD ||
1816 scan_data->channel == 0) &&
1817 (scan_data->id == SCAN_WILD_CARD ||
1818 scan_data->id == id))
1819 scsi_scan_target(&session->dev, 0, id,
1820 scan_data->lun, 1);
1821 }
1822
1823 user_scan_exit:
1824 mutex_unlock(&ihost->mutex);
1825 ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
1826 return 0;
1827 }
1828
1829 static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
1830 uint id, u64 lun)
1831 {
1832 struct iscsi_scan_data scan_data;
1833
1834 scan_data.channel = channel;
1835 scan_data.id = id;
1836 scan_data.lun = lun;
1837
1838 return device_for_each_child(&shost->shost_gendev, &scan_data,
1839 iscsi_user_scan_session);
1840 }
1841
1842 static void iscsi_scan_session(struct work_struct *work)
1843 {
1844 struct iscsi_cls_session *session =
1845 container_of(work, struct iscsi_cls_session, scan_work);
1846 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1847 struct iscsi_cls_host *ihost = shost->shost_data;
1848 struct iscsi_scan_data scan_data;
1849
1850 scan_data.channel = 0;
1851 scan_data.id = SCAN_WILD_CARD;
1852 scan_data.lun = SCAN_WILD_CARD;
1853
1854 iscsi_user_scan_session(&session->dev, &scan_data);
1855 atomic_dec(&ihost->nr_scans);
1856 }
1857
1858 /**
1859 * iscsi_block_scsi_eh - block scsi eh until session state has transistioned
1860 * @cmd: scsi cmd passed to scsi eh handler
1861 *
1862 * If the session is down this function will wait for the recovery
1863 * timer to fire or for the session to be logged back in. If the
1864 * recovery timer fires then FAST_IO_FAIL is returned. The caller
1865 * should pass this error value to the scsi eh.
1866 */
1867 int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
1868 {
1869 struct iscsi_cls_session *session =
1870 starget_to_session(scsi_target(cmd->device));
1871 unsigned long flags;
1872 int ret = 0;
1873
1874 spin_lock_irqsave(&session->lock, flags);
1875 while (session->state != ISCSI_SESSION_LOGGED_IN) {
1876 if (session->state == ISCSI_SESSION_FREE) {
1877 ret = FAST_IO_FAIL;
1878 break;
1879 }
1880 spin_unlock_irqrestore(&session->lock, flags);
1881 msleep(1000);
1882 spin_lock_irqsave(&session->lock, flags);
1883 }
1884 spin_unlock_irqrestore(&session->lock, flags);
1885 return ret;
1886 }
1887 EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
1888
1889 static void session_recovery_timedout(struct work_struct *work)
1890 {
1891 struct iscsi_cls_session *session =
1892 container_of(work, struct iscsi_cls_session,
1893 recovery_work.work);
1894 unsigned long flags;
1895
1896 iscsi_cls_session_printk(KERN_INFO, session,
1897 "session recovery timed out after %d secs\n",
1898 session->recovery_tmo);
1899
1900 spin_lock_irqsave(&session->lock, flags);
1901 switch (session->state) {
1902 case ISCSI_SESSION_FAILED:
1903 session->state = ISCSI_SESSION_FREE;
1904 break;
1905 case ISCSI_SESSION_LOGGED_IN:
1906 case ISCSI_SESSION_FREE:
1907 /* we raced with the unblock's flush */
1908 spin_unlock_irqrestore(&session->lock, flags);
1909 return;
1910 }
1911 spin_unlock_irqrestore(&session->lock, flags);
1912
1913 if (session->transport->session_recovery_timedout)
1914 session->transport->session_recovery_timedout(session);
1915
1916 ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
1917 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
1918 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
1919 }
1920
1921 static void __iscsi_unblock_session(struct work_struct *work)
1922 {
1923 struct iscsi_cls_session *session =
1924 container_of(work, struct iscsi_cls_session,
1925 unblock_work);
1926 struct Scsi_Host *shost = iscsi_session_to_shost(session);
1927 struct iscsi_cls_host *ihost = shost->shost_data;
1928 unsigned long flags;
1929
1930 ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
1931 /*
1932 * The recovery and unblock work get run from the same workqueue,
1933 * so try to cancel it if it was going to run after this unblock.
1934 */
1935 cancel_delayed_work(&session->recovery_work);
1936 spin_lock_irqsave(&session->lock, flags);
1937 session->state = ISCSI_SESSION_LOGGED_IN;
1938 spin_unlock_irqrestore(&session->lock, flags);
1939 /* start IO */
1940 scsi_target_unblock(&session->dev, SDEV_RUNNING);
1941 /*
1942 * Only do kernel scanning if the driver is properly hooked into
1943 * the async scanning code (drivers like iscsi_tcp do login and
1944 * scanning from userspace).
1945 */
1946 if (shost->hostt->scan_finished) {
1947 if (scsi_queue_work(shost, &session->scan_work))
1948 atomic_inc(&ihost->nr_scans);
1949 }
1950 ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
1951 }
1952
1953 /**
1954 * iscsi_unblock_session - set a session as logged in and start IO.
1955 * @session: iscsi session
1956 *
1957 * Mark a session as ready to accept IO.
1958 */
1959 void iscsi_unblock_session(struct iscsi_cls_session *session)
1960 {
1961 queue_work(iscsi_eh_timer_workq, &session->unblock_work);
1962 /*
1963 * make sure all the events have completed before tell the driver
1964 * it is safe
1965 */
1966 flush_workqueue(iscsi_eh_timer_workq);
1967 }
1968 EXPORT_SYMBOL_GPL(iscsi_unblock_session);
1969
1970 static void __iscsi_block_session(struct work_struct *work)
1971 {
1972 struct iscsi_cls_session *session =
1973 container_of(work, struct iscsi_cls_session,
1974 block_work);
1975 unsigned long flags;
1976
1977 ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
1978 spin_lock_irqsave(&session->lock, flags);
1979 session->state = ISCSI_SESSION_FAILED;
1980 spin_unlock_irqrestore(&session->lock, flags);
1981 scsi_target_block(&session->dev);
1982 ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
1983 if (session->recovery_tmo >= 0)
1984 queue_delayed_work(iscsi_eh_timer_workq,
1985 &session->recovery_work,
1986 session->recovery_tmo * HZ);
1987 }
1988
1989 void iscsi_block_session(struct iscsi_cls_session *session)
1990 {
1991 queue_work(iscsi_eh_timer_workq, &session->block_work);
1992 }
1993 EXPORT_SYMBOL_GPL(iscsi_block_session);
1994
1995 static void __iscsi_unbind_session(struct work_struct *work)
1996 {
1997 struct iscsi_cls_session *session =
1998 container_of(work, struct iscsi_cls_session,
1999 unbind_work);
2000 struct Scsi_Host *shost = iscsi_session_to_shost(session);
2001 struct iscsi_cls_host *ihost = shost->shost_data;
2002 unsigned long flags;
2003 unsigned int target_id;
2004
2005 ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
2006
2007 /* Prevent new scans and make sure scanning is not in progress */
2008 mutex_lock(&ihost->mutex);
2009 spin_lock_irqsave(&session->lock, flags);
2010 if (session->target_id == ISCSI_MAX_TARGET) {
2011 spin_unlock_irqrestore(&session->lock, flags);
2012 mutex_unlock(&ihost->mutex);
2013 return;
2014 }
2015
2016 target_id = session->target_id;
2017 session->target_id = ISCSI_MAX_TARGET;
2018 spin_unlock_irqrestore(&session->lock, flags);
2019 mutex_unlock(&ihost->mutex);
2020
2021 if (session->ida_used)
2022 ida_simple_remove(&iscsi_sess_ida, target_id);
2023
2024 scsi_remove_target(&session->dev);
2025 iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
2026 ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
2027 }
2028
2029 struct iscsi_cls_session *
2030 iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2031 int dd_size)
2032 {
2033 struct iscsi_cls_session *session;
2034
2035 session = kzalloc(sizeof(*session) + dd_size,
2036 GFP_KERNEL);
2037 if (!session)
2038 return NULL;
2039
2040 session->transport = transport;
2041 session->creator = -1;
2042 session->recovery_tmo = 120;
2043 session->state = ISCSI_SESSION_FREE;
2044 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
2045 INIT_LIST_HEAD(&session->sess_list);
2046 INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
2047 INIT_WORK(&session->block_work, __iscsi_block_session);
2048 INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
2049 INIT_WORK(&session->scan_work, iscsi_scan_session);
2050 spin_lock_init(&session->lock);
2051
2052 /* this is released in the dev's release function */
2053 scsi_host_get(shost);
2054 session->dev.parent = &shost->shost_gendev;
2055 session->dev.release = iscsi_session_release;
2056 device_initialize(&session->dev);
2057 if (dd_size)
2058 session->dd_data = &session[1];
2059
2060 ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
2061 return session;
2062 }
2063 EXPORT_SYMBOL_GPL(iscsi_alloc_session);
2064
2065 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
2066 {
2067 struct Scsi_Host *shost = iscsi_session_to_shost(session);
2068 struct iscsi_cls_host *ihost;
2069 unsigned long flags;
2070 int id = 0;
2071 int err;
2072
2073 ihost = shost->shost_data;
2074 session->sid = atomic_add_return(1, &iscsi_session_nr);
2075
2076 if (target_id == ISCSI_MAX_TARGET) {
2077 id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
2078
2079 if (id < 0) {
2080 iscsi_cls_session_printk(KERN_ERR, session,
2081 "Failure in Target ID Allocation\n");
2082 return id;
2083 }
2084 session->target_id = (unsigned int)id;
2085 session->ida_used = true;
2086 } else
2087 session->target_id = target_id;
2088
2089 dev_set_name(&session->dev, "session%u", session->sid);
2090 err = device_add(&session->dev);
2091 if (err) {
2092 iscsi_cls_session_printk(KERN_ERR, session,
2093 "could not register session's dev\n");
2094 goto release_ida;
2095 }
2096 transport_register_device(&session->dev);
2097
2098 spin_lock_irqsave(&sesslock, flags);
2099 list_add(&session->sess_list, &sesslist);
2100 spin_unlock_irqrestore(&sesslock, flags);
2101
2102 iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
2103 ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
2104 return 0;
2105
2106 release_ida:
2107 if (session->ida_used)
2108 ida_simple_remove(&iscsi_sess_ida, session->target_id);
2109
2110 return err;
2111 }
2112 EXPORT_SYMBOL_GPL(iscsi_add_session);
2113
2114 /**
2115 * iscsi_create_session - create iscsi class session
2116 * @shost: scsi host
2117 * @transport: iscsi transport
2118 * @dd_size: private driver data size
2119 * @target_id: which target
2120 *
2121 * This can be called from a LLD or iscsi_transport.
2122 */
2123 struct iscsi_cls_session *
2124 iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
2125 int dd_size, unsigned int target_id)
2126 {
2127 struct iscsi_cls_session *session;
2128
2129 session = iscsi_alloc_session(shost, transport, dd_size);
2130 if (!session)
2131 return NULL;
2132
2133 if (iscsi_add_session(session, target_id)) {
2134 iscsi_free_session(session);
2135 return NULL;
2136 }
2137 return session;
2138 }
2139 EXPORT_SYMBOL_GPL(iscsi_create_session);
2140
2141 static void iscsi_conn_release(struct device *dev)
2142 {
2143 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
2144 struct device *parent = conn->dev.parent;
2145
2146 ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
2147 kfree(conn);
2148 put_device(parent);
2149 }
2150
2151 static int iscsi_is_conn_dev(const struct device *dev)
2152 {
2153 return dev->release == iscsi_conn_release;
2154 }
2155
2156 static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
2157 {
2158 if (!iscsi_is_conn_dev(dev))
2159 return 0;
2160 return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
2161 }
2162
2163 void iscsi_remove_session(struct iscsi_cls_session *session)
2164 {
2165 struct Scsi_Host *shost = iscsi_session_to_shost(session);
2166 unsigned long flags;
2167 int err;
2168
2169 ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
2170
2171 spin_lock_irqsave(&sesslock, flags);
2172 list_del(&session->sess_list);
2173 spin_unlock_irqrestore(&sesslock, flags);
2174
2175 /* make sure there are no blocks/unblocks queued */
2176 flush_workqueue(iscsi_eh_timer_workq);
2177 /* make sure the timedout callout is not running */
2178 if (!cancel_delayed_work(&session->recovery_work))
2179 flush_workqueue(iscsi_eh_timer_workq);
2180 /*
2181 * If we are blocked let commands flow again. The lld or iscsi
2182 * layer should set up the queuecommand to fail commands.
2183 * We assume that LLD will not be calling block/unblock while
2184 * removing the session.
2185 */
2186 spin_lock_irqsave(&session->lock, flags);
2187 session->state = ISCSI_SESSION_FREE;
2188 spin_unlock_irqrestore(&session->lock, flags);
2189
2190 scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
2191 /* flush running scans then delete devices */
2192 scsi_flush_work(shost);
2193 __iscsi_unbind_session(&session->unbind_work);
2194
2195 /* hw iscsi may not have removed all connections from session */
2196 err = device_for_each_child(&session->dev, NULL,
2197 iscsi_iter_destroy_conn_fn);
2198 if (err)
2199 iscsi_cls_session_printk(KERN_ERR, session,
2200 "Could not delete all connections "
2201 "for session. Error %d.\n", err);
2202
2203 transport_unregister_device(&session->dev);
2204
2205 ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
2206 device_del(&session->dev);
2207 }
2208 EXPORT_SYMBOL_GPL(iscsi_remove_session);
2209
2210 void iscsi_free_session(struct iscsi_cls_session *session)
2211 {
2212 ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
2213 iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
2214 put_device(&session->dev);
2215 }
2216 EXPORT_SYMBOL_GPL(iscsi_free_session);
2217
2218 /**
2219 * iscsi_destroy_session - destroy iscsi session
2220 * @session: iscsi_session
2221 *
2222 * Can be called by a LLD or iscsi_transport. There must not be
2223 * any running connections.
2224 */
2225 int iscsi_destroy_session(struct iscsi_cls_session *session)
2226 {
2227 iscsi_remove_session(session);
2228 ISCSI_DBG_TRANS_SESSION(session, "Completing session destruction\n");
2229 iscsi_free_session(session);
2230 return 0;
2231 }
2232 EXPORT_SYMBOL_GPL(iscsi_destroy_session);
2233
2234 /**
2235 * iscsi_create_conn - create iscsi class connection
2236 * @session: iscsi cls session
2237 * @dd_size: private driver data size
2238 * @cid: connection id
2239 *
2240 * This can be called from a LLD or iscsi_transport. The connection
2241 * is child of the session so cid must be unique for all connections
2242 * on the session.
2243 *
2244 * Since we do not support MCS, cid will normally be zero. In some cases
2245 * for software iscsi we could be trying to preallocate a connection struct
2246 * in which case there could be two connection structs and cid would be
2247 * non-zero.
2248 */
2249 struct iscsi_cls_conn *
2250 iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
2251 {
2252 struct iscsi_transport *transport = session->transport;
2253 struct iscsi_cls_conn *conn;
2254 unsigned long flags;
2255 int err;
2256
2257 conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
2258 if (!conn)
2259 return NULL;
2260 if (dd_size)
2261 conn->dd_data = &conn[1];
2262
2263 mutex_init(&conn->ep_mutex);
2264 INIT_LIST_HEAD(&conn->conn_list);
2265 conn->transport = transport;
2266 conn->cid = cid;
2267
2268 /* this is released in the dev's release function */
2269 if (!get_device(&session->dev))
2270 goto free_conn;
2271
2272 dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
2273 conn->dev.parent = &session->dev;
2274 conn->dev.release = iscsi_conn_release;
2275 err = device_register(&conn->dev);
2276 if (err) {
2277 iscsi_cls_session_printk(KERN_ERR, session, "could not "
2278 "register connection's dev\n");
2279 goto release_parent_ref;
2280 }
2281 transport_register_device(&conn->dev);
2282
2283 spin_lock_irqsave(&connlock, flags);
2284 list_add(&conn->conn_list, &connlist);
2285 spin_unlock_irqrestore(&connlock, flags);
2286
2287 ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
2288 return conn;
2289
2290 release_parent_ref:
2291 put_device(&session->dev);
2292 free_conn:
2293 kfree(conn);
2294 return NULL;
2295 }
2296
2297 EXPORT_SYMBOL_GPL(iscsi_create_conn);
2298
2299 /**
2300 * iscsi_destroy_conn - destroy iscsi class connection
2301 * @conn: iscsi cls session
2302 *
2303 * This can be called from a LLD or iscsi_transport.
2304 */
2305 int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
2306 {
2307 unsigned long flags;
2308
2309 spin_lock_irqsave(&connlock, flags);
2310 list_del(&conn->conn_list);
2311 spin_unlock_irqrestore(&connlock, flags);
2312
2313 transport_unregister_device(&conn->dev);
2314 ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
2315 device_unregister(&conn->dev);
2316 return 0;
2317 }
2318 EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
2319
2320 /*
2321 * iscsi interface functions
2322 */
2323 static struct iscsi_internal *
2324 iscsi_if_transport_lookup(struct iscsi_transport *tt)
2325 {
2326 struct iscsi_internal *priv;
2327 unsigned long flags;
2328
2329 spin_lock_irqsave(&iscsi_transport_lock, flags);
2330 list_for_each_entry(priv, &iscsi_transports, list) {
2331 if (tt == priv->iscsi_transport) {
2332 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2333 return priv;
2334 }
2335 }
2336 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
2337 return NULL;
2338 }
2339
2340 static int
2341 iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
2342 {
2343 return nlmsg_multicast(nls, skb, 0, group, gfp);
2344 }
2345
2346 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
2347 char *data, uint32_t data_size)
2348 {
2349 struct nlmsghdr *nlh;
2350 struct sk_buff *skb;
2351 struct iscsi_uevent *ev;
2352 char *pdu;
2353 struct iscsi_internal *priv;
2354 int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
2355 data_size);
2356
2357 priv = iscsi_if_transport_lookup(conn->transport);
2358 if (!priv)
2359 return -EINVAL;
2360
2361 skb = alloc_skb(len, GFP_ATOMIC);
2362 if (!skb) {
2363 iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
2364 iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
2365 "control PDU: OOM\n");
2366 return -ENOMEM;
2367 }
2368
2369 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2370 ev = nlmsg_data(nlh);
2371 memset(ev, 0, sizeof(*ev));
2372 ev->transport_handle = iscsi_handle(conn->transport);
2373 ev->type = ISCSI_KEVENT_RECV_PDU;
2374 ev->r.recv_req.cid = conn->cid;
2375 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
2376 pdu = (char*)ev + sizeof(*ev);
2377 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
2378 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
2379
2380 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2381 }
2382 EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
2383
2384 int iscsi_offload_mesg(struct Scsi_Host *shost,
2385 struct iscsi_transport *transport, uint32_t type,
2386 char *data, uint16_t data_size)
2387 {
2388 struct nlmsghdr *nlh;
2389 struct sk_buff *skb;
2390 struct iscsi_uevent *ev;
2391 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2392
2393 skb = alloc_skb(len, GFP_ATOMIC);
2394 if (!skb) {
2395 printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
2396 return -ENOMEM;
2397 }
2398
2399 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2400 ev = nlmsg_data(nlh);
2401 memset(ev, 0, sizeof(*ev));
2402 ev->type = type;
2403 ev->transport_handle = iscsi_handle(transport);
2404 switch (type) {
2405 case ISCSI_KEVENT_PATH_REQ:
2406 ev->r.req_path.host_no = shost->host_no;
2407 break;
2408 case ISCSI_KEVENT_IF_DOWN:
2409 ev->r.notify_if_down.host_no = shost->host_no;
2410 break;
2411 }
2412
2413 memcpy((char *)ev + sizeof(*ev), data, data_size);
2414
2415 return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
2416 }
2417 EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
2418
2419 void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
2420 {
2421 struct nlmsghdr *nlh;
2422 struct sk_buff *skb;
2423 struct iscsi_uevent *ev;
2424 struct iscsi_internal *priv;
2425 int len = nlmsg_total_size(sizeof(*ev));
2426
2427 priv = iscsi_if_transport_lookup(conn->transport);
2428 if (!priv)
2429 return;
2430
2431 skb = alloc_skb(len, GFP_ATOMIC);
2432 if (!skb) {
2433 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2434 "conn error (%d)\n", error);
2435 return;
2436 }
2437
2438 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2439 ev = nlmsg_data(nlh);
2440 ev->transport_handle = iscsi_handle(conn->transport);
2441 ev->type = ISCSI_KEVENT_CONN_ERROR;
2442 ev->r.connerror.error = error;
2443 ev->r.connerror.cid = conn->cid;
2444 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
2445
2446 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2447
2448 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
2449 error);
2450 }
2451 EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
2452
2453 void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
2454 enum iscsi_conn_state state)
2455 {
2456 struct nlmsghdr *nlh;
2457 struct sk_buff *skb;
2458 struct iscsi_uevent *ev;
2459 struct iscsi_internal *priv;
2460 int len = nlmsg_total_size(sizeof(*ev));
2461
2462 priv = iscsi_if_transport_lookup(conn->transport);
2463 if (!priv)
2464 return;
2465
2466 skb = alloc_skb(len, GFP_ATOMIC);
2467 if (!skb) {
2468 iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
2469 "conn login (%d)\n", state);
2470 return;
2471 }
2472
2473 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2474 ev = nlmsg_data(nlh);
2475 ev->transport_handle = iscsi_handle(conn->transport);
2476 ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
2477 ev->r.conn_login.state = state;
2478 ev->r.conn_login.cid = conn->cid;
2479 ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
2480 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
2481
2482 iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
2483 state);
2484 }
2485 EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
2486
2487 void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
2488 enum iscsi_host_event_code code, uint32_t data_size,
2489 uint8_t *data)
2490 {
2491 struct nlmsghdr *nlh;
2492 struct sk_buff *skb;
2493 struct iscsi_uevent *ev;
2494 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2495
2496 skb = alloc_skb(len, GFP_NOIO);
2497 if (!skb) {
2498 printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
2499 host_no, code);
2500 return;
2501 }
2502
2503 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2504 ev = nlmsg_data(nlh);
2505 ev->transport_handle = iscsi_handle(transport);
2506 ev->type = ISCSI_KEVENT_HOST_EVENT;
2507 ev->r.host_event.host_no = host_no;
2508 ev->r.host_event.code = code;
2509 ev->r.host_event.data_size = data_size;
2510
2511 if (data_size)
2512 memcpy((char *)ev + sizeof(*ev), data, data_size);
2513
2514 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2515 }
2516 EXPORT_SYMBOL_GPL(iscsi_post_host_event);
2517
2518 void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
2519 uint32_t status, uint32_t pid, uint32_t data_size,
2520 uint8_t *data)
2521 {
2522 struct nlmsghdr *nlh;
2523 struct sk_buff *skb;
2524 struct iscsi_uevent *ev;
2525 int len = nlmsg_total_size(sizeof(*ev) + data_size);
2526
2527 skb = alloc_skb(len, GFP_NOIO);
2528 if (!skb) {
2529 printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
2530 return;
2531 }
2532
2533 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2534 ev = nlmsg_data(nlh);
2535 ev->transport_handle = iscsi_handle(transport);
2536 ev->type = ISCSI_KEVENT_PING_COMP;
2537 ev->r.ping_comp.host_no = host_no;
2538 ev->r.ping_comp.status = status;
2539 ev->r.ping_comp.pid = pid;
2540 ev->r.ping_comp.data_size = data_size;
2541 memcpy((char *)ev + sizeof(*ev), data, data_size);
2542
2543 iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
2544 }
2545 EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
2546
2547 static int
2548 iscsi_if_send_reply(uint32_t group, int seq, int type, int done, int multi,
2549 void *payload, int size)
2550 {
2551 struct sk_buff *skb;
2552 struct nlmsghdr *nlh;
2553 int len = nlmsg_total_size(size);
2554 int flags = multi ? NLM_F_MULTI : 0;
2555 int t = done ? NLMSG_DONE : type;
2556
2557 skb = alloc_skb(len, GFP_ATOMIC);
2558 if (!skb) {
2559 printk(KERN_ERR "Could not allocate skb to send reply.\n");
2560 return -ENOMEM;
2561 }
2562
2563 nlh = __nlmsg_put(skb, 0, 0, t, (len - sizeof(*nlh)), 0);
2564 nlh->nlmsg_flags = flags;
2565 memcpy(nlmsg_data(nlh), payload, size);
2566 return iscsi_multicast_skb(skb, group, GFP_ATOMIC);
2567 }
2568
2569 static int
2570 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
2571 {
2572 struct iscsi_uevent *ev = nlmsg_data(nlh);
2573 struct iscsi_stats *stats;
2574 struct sk_buff *skbstat;
2575 struct iscsi_cls_conn *conn;
2576 struct nlmsghdr *nlhstat;
2577 struct iscsi_uevent *evstat;
2578 struct iscsi_internal *priv;
2579 int len = nlmsg_total_size(sizeof(*ev) +
2580 sizeof(struct iscsi_stats) +
2581 sizeof(struct iscsi_stats_custom) *
2582 ISCSI_STATS_CUSTOM_MAX);
2583 int err = 0;
2584
2585 priv = iscsi_if_transport_lookup(transport);
2586 if (!priv)
2587 return -EINVAL;
2588
2589 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
2590 if (!conn)
2591 return -EEXIST;
2592
2593 do {
2594 int actual_size;
2595
2596 skbstat = alloc_skb(len, GFP_ATOMIC);
2597 if (!skbstat) {
2598 iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
2599 "deliver stats: OOM\n");
2600 return -ENOMEM;
2601 }
2602
2603 nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
2604 (len - sizeof(*nlhstat)), 0);
2605 evstat = nlmsg_data(nlhstat);
2606 memset(evstat, 0, sizeof(*evstat));
2607 evstat->transport_handle = iscsi_handle(conn->transport);
2608 evstat->type = nlh->nlmsg_type;
2609 evstat->u.get_stats.cid =
2610 ev->u.get_stats.cid;
2611 evstat->u.get_stats.sid =
2612 ev->u.get_stats.sid;
2613 stats = (struct iscsi_stats *)
2614 ((char*)evstat + sizeof(*evstat));
2615 memset(stats, 0, sizeof(*stats));
2616
2617 transport->get_stats(conn, stats);
2618 actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
2619 sizeof(struct iscsi_stats) +
2620 sizeof(struct iscsi_stats_custom) *
2621 stats->custom_length);
2622 actual_size -= sizeof(*nlhstat);
2623 actual_size = nlmsg_msg_size(actual_size);
2624 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
2625 nlhstat->nlmsg_len = actual_size;
2626
2627 err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
2628 GFP_ATOMIC);
2629 } while (err < 0 && err != -ECONNREFUSED);
2630
2631 return err;
2632 }
2633
2634 /**
2635 * iscsi_session_event - send session destr. completion event
2636 * @session: iscsi class session
2637 * @event: type of event
2638 */
2639 int iscsi_session_event(struct iscsi_cls_session *session,
2640 enum iscsi_uevent_e event)
2641 {
2642 struct iscsi_internal *priv;
2643 struct Scsi_Host *shost;
2644 struct iscsi_uevent *ev;
2645 struct sk_buff *skb;
2646 struct nlmsghdr *nlh;
2647 int rc, len = nlmsg_total_size(sizeof(*ev));
2648
2649 priv = iscsi_if_transport_lookup(session->transport);
2650 if (!priv)
2651 return -EINVAL;
2652 shost = iscsi_session_to_shost(session);
2653
2654 skb = alloc_skb(len, GFP_KERNEL);
2655 if (!skb) {
2656 iscsi_cls_session_printk(KERN_ERR, session,
2657 "Cannot notify userspace of session "
2658 "event %u\n", event);
2659 return -ENOMEM;
2660 }
2661
2662 nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
2663 ev = nlmsg_data(nlh);
2664 ev->transport_handle = iscsi_handle(session->transport);
2665
2666 ev->type = event;
2667 switch (event) {
2668 case ISCSI_KEVENT_DESTROY_SESSION:
2669 ev->r.d_session.host_no = shost->host_no;
2670 ev->r.d_session.sid = session->sid;
2671 break;
2672 case ISCSI_KEVENT_CREATE_SESSION:
2673 ev->r.c_session_ret.host_no = shost->host_no;
2674 ev->r.c_session_ret.sid = session->sid;
2675 break;
2676 case ISCSI_KEVENT_UNBIND_SESSION:
2677 ev->r.unbind_session.host_no = shost->host_no;
2678 ev->r.unbind_session.sid = session->sid;
2679 break;
2680 default:
2681 iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
2682 "%u.\n", event);
2683 kfree_skb(skb);
2684 return -EINVAL;
2685 }
2686
2687 /*
2688 * this will occur if the daemon is not up, so we just warn
2689 * the user and when the daemon is restarted it will handle it
2690 */
2691 rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
2692 if (rc == -ESRCH)
2693 iscsi_cls_session_printk(KERN_ERR, session,
2694 "Cannot notify userspace of session "
2695 "event %u. Check iscsi daemon\n",
2696 event);
2697
2698 ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
2699 event, rc);
2700 return rc;
2701 }
2702 EXPORT_SYMBOL_GPL(iscsi_session_event);
2703
2704 static int
2705 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
2706 struct iscsi_uevent *ev, pid_t pid,
2707 uint32_t initial_cmdsn, uint16_t cmds_max,
2708 uint16_t queue_depth)
2709 {
2710 struct iscsi_transport *transport = priv->iscsi_transport;
2711 struct iscsi_cls_session *session;
2712 struct Scsi_Host *shost;
2713
2714 session = transport->create_session(ep, cmds_max, queue_depth,
2715 initial_cmdsn);
2716 if (!session)
2717 return -ENOMEM;
2718
2719 session->creator = pid;
2720 shost = iscsi_session_to_shost(session);
2721 ev->r.c_session_ret.host_no = shost->host_no;
2722 ev->r.c_session_ret.sid = session->sid;
2723 ISCSI_DBG_TRANS_SESSION(session,
2724 "Completed creating transport session\n");
2725 return 0;
2726 }
2727
2728 static int
2729 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2730 {
2731 struct iscsi_cls_conn *conn;
2732 struct iscsi_cls_session *session;
2733
2734 session = iscsi_session_lookup(ev->u.c_conn.sid);
2735 if (!session) {
2736 printk(KERN_ERR "iscsi: invalid session %d.\n",
2737 ev->u.c_conn.sid);
2738 return -EINVAL;
2739 }
2740
2741 conn = transport->create_conn(session, ev->u.c_conn.cid);
2742 if (!conn) {
2743 iscsi_cls_session_printk(KERN_ERR, session,
2744 "couldn't create a new connection.");
2745 return -ENOMEM;
2746 }
2747
2748 ev->r.c_conn_ret.sid = session->sid;
2749 ev->r.c_conn_ret.cid = conn->cid;
2750
2751 ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
2752 return 0;
2753 }
2754
2755 static int
2756 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2757 {
2758 struct iscsi_cls_conn *conn;
2759
2760 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
2761 if (!conn)
2762 return -EINVAL;
2763
2764 ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
2765 if (transport->destroy_conn)
2766 transport->destroy_conn(conn);
2767
2768 return 0;
2769 }
2770
2771 static int
2772 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2773 {
2774 char *data = (char*)ev + sizeof(*ev);
2775 struct iscsi_cls_conn *conn;
2776 struct iscsi_cls_session *session;
2777 int err = 0, value = 0;
2778
2779 session = iscsi_session_lookup(ev->u.set_param.sid);
2780 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
2781 if (!conn || !session)
2782 return -EINVAL;
2783
2784 switch (ev->u.set_param.param) {
2785 case ISCSI_PARAM_SESS_RECOVERY_TMO:
2786 sscanf(data, "%d", &value);
2787 session->recovery_tmo = value;
2788 break;
2789 default:
2790 err = transport->set_param(conn, ev->u.set_param.param,
2791 data, ev->u.set_param.len);
2792 }
2793
2794 return err;
2795 }
2796
2797 static int iscsi_if_ep_connect(struct iscsi_transport *transport,
2798 struct iscsi_uevent *ev, int msg_type)
2799 {
2800 struct iscsi_endpoint *ep;
2801 struct sockaddr *dst_addr;
2802 struct Scsi_Host *shost = NULL;
2803 int non_blocking, err = 0;
2804
2805 if (!transport->ep_connect)
2806 return -EINVAL;
2807
2808 if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
2809 shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
2810 if (!shost) {
2811 printk(KERN_ERR "ep connect failed. Could not find "
2812 "host no %u\n",
2813 ev->u.ep_connect_through_host.host_no);
2814 return -ENODEV;
2815 }
2816 non_blocking = ev->u.ep_connect_through_host.non_blocking;
2817 } else
2818 non_blocking = ev->u.ep_connect.non_blocking;
2819
2820 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2821 ep = transport->ep_connect(shost, dst_addr, non_blocking);
2822 if (IS_ERR(ep)) {
2823 err = PTR_ERR(ep);
2824 goto release_host;
2825 }
2826
2827 ev->r.ep_connect_ret.handle = ep->id;
2828 release_host:
2829 if (shost)
2830 scsi_host_put(shost);
2831 return err;
2832 }
2833
2834 static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
2835 u64 ep_handle)
2836 {
2837 struct iscsi_cls_conn *conn;
2838 struct iscsi_endpoint *ep;
2839
2840 if (!transport->ep_disconnect)
2841 return -EINVAL;
2842
2843 ep = iscsi_lookup_endpoint(ep_handle);
2844 if (!ep)
2845 return -EINVAL;
2846 conn = ep->conn;
2847 if (conn) {
2848 mutex_lock(&conn->ep_mutex);
2849 conn->ep = NULL;
2850 mutex_unlock(&conn->ep_mutex);
2851 }
2852
2853 transport->ep_disconnect(ep);
2854 return 0;
2855 }
2856
2857 static int
2858 iscsi_if_transport_ep(struct iscsi_transport *transport,
2859 struct iscsi_uevent *ev, int msg_type)
2860 {
2861 struct iscsi_endpoint *ep;
2862 int rc = 0;
2863
2864 switch (msg_type) {
2865 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
2866 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
2867 rc = iscsi_if_ep_connect(transport, ev, msg_type);
2868 break;
2869 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
2870 if (!transport->ep_poll)
2871 return -EINVAL;
2872
2873 ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
2874 if (!ep)
2875 return -EINVAL;
2876
2877 ev->r.retcode = transport->ep_poll(ep,
2878 ev->u.ep_poll.timeout_ms);
2879 break;
2880 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
2881 rc = iscsi_if_ep_disconnect(transport,
2882 ev->u.ep_disconnect.ep_handle);
2883 break;
2884 }
2885 return rc;
2886 }
2887
2888 static int
2889 iscsi_tgt_dscvr(struct iscsi_transport *transport,
2890 struct iscsi_uevent *ev)
2891 {
2892 struct Scsi_Host *shost;
2893 struct sockaddr *dst_addr;
2894 int err;
2895
2896 if (!transport->tgt_dscvr)
2897 return -EINVAL;
2898
2899 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
2900 if (!shost) {
2901 printk(KERN_ERR "target discovery could not find host no %u\n",
2902 ev->u.tgt_dscvr.host_no);
2903 return -ENODEV;
2904 }
2905
2906
2907 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
2908 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
2909 ev->u.tgt_dscvr.enable, dst_addr);
2910 scsi_host_put(shost);
2911 return err;
2912 }
2913
2914 static int
2915 iscsi_set_host_param(struct iscsi_transport *transport,
2916 struct iscsi_uevent *ev)
2917 {
2918 char *data = (char*)ev + sizeof(*ev);
2919 struct Scsi_Host *shost;
2920 int err;
2921
2922 if (!transport->set_host_param)
2923 return -ENOSYS;
2924
2925 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
2926 if (!shost) {
2927 printk(KERN_ERR "set_host_param could not find host no %u\n",
2928 ev->u.set_host_param.host_no);
2929 return -ENODEV;
2930 }
2931
2932 err = transport->set_host_param(shost, ev->u.set_host_param.param,
2933 data, ev->u.set_host_param.len);
2934 scsi_host_put(shost);
2935 return err;
2936 }
2937
2938 static int
2939 iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2940 {
2941 struct Scsi_Host *shost;
2942 struct iscsi_path *params;
2943 int err;
2944
2945 if (!transport->set_path)
2946 return -ENOSYS;
2947
2948 shost = scsi_host_lookup(ev->u.set_path.host_no);
2949 if (!shost) {
2950 printk(KERN_ERR "set path could not find host no %u\n",
2951 ev->u.set_path.host_no);
2952 return -ENODEV;
2953 }
2954
2955 params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
2956 err = transport->set_path(shost, params);
2957
2958 scsi_host_put(shost);
2959 return err;
2960 }
2961
2962 static int
2963 iscsi_set_iface_params(struct iscsi_transport *transport,
2964 struct iscsi_uevent *ev, uint32_t len)
2965 {
2966 char *data = (char *)ev + sizeof(*ev);
2967 struct Scsi_Host *shost;
2968 int err;
2969
2970 if (!transport->set_iface_param)
2971 return -ENOSYS;
2972
2973 shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
2974 if (!shost) {
2975 printk(KERN_ERR "set_iface_params could not find host no %u\n",
2976 ev->u.set_iface_params.host_no);
2977 return -ENODEV;
2978 }
2979
2980 err = transport->set_iface_param(shost, data, len);
2981 scsi_host_put(shost);
2982 return err;
2983 }
2984
2985 static int
2986 iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
2987 {
2988 struct Scsi_Host *shost;
2989 struct sockaddr *dst_addr;
2990 int err;
2991
2992 if (!transport->send_ping)
2993 return -ENOSYS;
2994
2995 shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
2996 if (!shost) {
2997 printk(KERN_ERR "iscsi_ping could not find host no %u\n",
2998 ev->u.iscsi_ping.host_no);
2999 return -ENODEV;
3000 }
3001
3002 dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
3003 err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
3004 ev->u.iscsi_ping.iface_type,
3005 ev->u.iscsi_ping.payload_size,
3006 ev->u.iscsi_ping.pid,
3007 dst_addr);
3008 scsi_host_put(shost);
3009 return err;
3010 }
3011
3012 static int
3013 iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3014 {
3015 struct iscsi_uevent *ev = nlmsg_data(nlh);
3016 struct Scsi_Host *shost = NULL;
3017 struct iscsi_chap_rec *chap_rec;
3018 struct iscsi_internal *priv;
3019 struct sk_buff *skbchap;
3020 struct nlmsghdr *nlhchap;
3021 struct iscsi_uevent *evchap;
3022 uint32_t chap_buf_size;
3023 int len, err = 0;
3024 char *buf;
3025
3026 if (!transport->get_chap)
3027 return -EINVAL;
3028
3029 priv = iscsi_if_transport_lookup(transport);
3030 if (!priv)
3031 return -EINVAL;
3032
3033 chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
3034 len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3035
3036 shost = scsi_host_lookup(ev->u.get_chap.host_no);
3037 if (!shost) {
3038 printk(KERN_ERR "%s: failed. Cound not find host no %u\n",
3039 __func__, ev->u.get_chap.host_no);
3040 return -ENODEV;
3041 }
3042
3043 do {
3044 int actual_size;
3045
3046 skbchap = alloc_skb(len, GFP_KERNEL);
3047 if (!skbchap) {
3048 printk(KERN_ERR "can not deliver chap: OOM\n");
3049 err = -ENOMEM;
3050 goto exit_get_chap;
3051 }
3052
3053 nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
3054 (len - sizeof(*nlhchap)), 0);
3055 evchap = nlmsg_data(nlhchap);
3056 memset(evchap, 0, sizeof(*evchap));
3057 evchap->transport_handle = iscsi_handle(transport);
3058 evchap->type = nlh->nlmsg_type;
3059 evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
3060 evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
3061 evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
3062 buf = (char *)evchap + sizeof(*evchap);
3063 memset(buf, 0, chap_buf_size);
3064
3065 err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
3066 &evchap->u.get_chap.num_entries, buf);
3067
3068 actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
3069 skb_trim(skbchap, NLMSG_ALIGN(actual_size));
3070 nlhchap->nlmsg_len = actual_size;
3071
3072 err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
3073 GFP_KERNEL);
3074 } while (err < 0 && err != -ECONNREFUSED);
3075
3076 exit_get_chap:
3077 scsi_host_put(shost);
3078 return err;
3079 }
3080
3081 static int iscsi_set_chap(struct iscsi_transport *transport,
3082 struct iscsi_uevent *ev, uint32_t len)
3083 {
3084 char *data = (char *)ev + sizeof(*ev);
3085 struct Scsi_Host *shost;
3086 int err = 0;
3087
3088 if (!transport->set_chap)
3089 return -ENOSYS;
3090
3091 shost = scsi_host_lookup(ev->u.set_path.host_no);
3092 if (!shost) {
3093 pr_err("%s could not find host no %u\n",
3094 __func__, ev->u.set_path.host_no);
3095 return -ENODEV;
3096 }
3097
3098 err = transport->set_chap(shost, data, len);
3099 scsi_host_put(shost);
3100 return err;
3101 }
3102
3103 static int iscsi_delete_chap(struct iscsi_transport *transport,
3104 struct iscsi_uevent *ev)
3105 {
3106 struct Scsi_Host *shost;
3107 int err = 0;
3108
3109 if (!transport->delete_chap)
3110 return -ENOSYS;
3111
3112 shost = scsi_host_lookup(ev->u.delete_chap.host_no);
3113 if (!shost) {
3114 printk(KERN_ERR "%s could not find host no %u\n",
3115 __func__, ev->u.delete_chap.host_no);
3116 return -ENODEV;
3117 }
3118
3119 err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
3120 scsi_host_put(shost);
3121 return err;
3122 }
3123
3124 static const struct {
3125 enum iscsi_discovery_parent_type value;
3126 char *name;
3127 } iscsi_discovery_parent_names[] = {
3128 {ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
3129 {ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
3130 {ISCSI_DISC_PARENT_ISNS, "isns" },
3131 };
3132
3133 char *iscsi_get_discovery_parent_name(int parent_type)
3134 {
3135 int i;
3136 char *state = "Unknown!";
3137
3138 for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
3139 if (iscsi_discovery_parent_names[i].value & parent_type) {
3140 state = iscsi_discovery_parent_names[i].name;
3141 break;
3142 }
3143 }
3144 return state;
3145 }
3146 EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
3147
3148 static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
3149 struct iscsi_uevent *ev, uint32_t len)
3150 {
3151 char *data = (char *)ev + sizeof(*ev);
3152 struct Scsi_Host *shost;
3153 struct iscsi_bus_flash_session *fnode_sess;
3154 struct iscsi_bus_flash_conn *fnode_conn;
3155 struct device *dev;
3156 uint32_t idx;
3157 int err = 0;
3158
3159 if (!transport->set_flashnode_param) {
3160 err = -ENOSYS;
3161 goto exit_set_fnode;
3162 }
3163
3164 shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
3165 if (!shost) {
3166 pr_err("%s could not find host no %u\n",
3167 __func__, ev->u.set_flashnode.host_no);
3168 err = -ENODEV;
3169 goto put_host;
3170 }
3171
3172 idx = ev->u.set_flashnode.flashnode_idx;
3173 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3174 if (!fnode_sess) {
3175 pr_err("%s could not find flashnode %u for host no %u\n",
3176 __func__, idx, ev->u.set_flashnode.host_no);
3177 err = -ENODEV;
3178 goto put_host;
3179 }
3180
3181 dev = iscsi_find_flashnode_conn(fnode_sess);
3182 if (!dev) {
3183 err = -ENODEV;
3184 goto put_sess;
3185 }
3186
3187 fnode_conn = iscsi_dev_to_flash_conn(dev);
3188 err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
3189 put_device(dev);
3190
3191 put_sess:
3192 put_device(&fnode_sess->dev);
3193
3194 put_host:
3195 scsi_host_put(shost);
3196
3197 exit_set_fnode:
3198 return err;
3199 }
3200
3201 static int iscsi_new_flashnode(struct iscsi_transport *transport,
3202 struct iscsi_uevent *ev, uint32_t len)
3203 {
3204 char *data = (char *)ev + sizeof(*ev);
3205 struct Scsi_Host *shost;
3206 int index;
3207 int err = 0;
3208
3209 if (!transport->new_flashnode) {
3210 err = -ENOSYS;
3211 goto exit_new_fnode;
3212 }
3213
3214 shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
3215 if (!shost) {
3216 pr_err("%s could not find host no %u\n",
3217 __func__, ev->u.new_flashnode.host_no);
3218 err = -ENODEV;
3219 goto put_host;
3220 }
3221
3222 index = transport->new_flashnode(shost, data, len);
3223
3224 if (index >= 0)
3225 ev->r.new_flashnode_ret.flashnode_idx = index;
3226 else
3227 err = -EIO;
3228
3229 put_host:
3230 scsi_host_put(shost);
3231
3232 exit_new_fnode:
3233 return err;
3234 }
3235
3236 static int iscsi_del_flashnode(struct iscsi_transport *transport,
3237 struct iscsi_uevent *ev)
3238 {
3239 struct Scsi_Host *shost;
3240 struct iscsi_bus_flash_session *fnode_sess;
3241 uint32_t idx;
3242 int err = 0;
3243
3244 if (!transport->del_flashnode) {
3245 err = -ENOSYS;
3246 goto exit_del_fnode;
3247 }
3248
3249 shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
3250 if (!shost) {
3251 pr_err("%s could not find host no %u\n",
3252 __func__, ev->u.del_flashnode.host_no);
3253 err = -ENODEV;
3254 goto put_host;
3255 }
3256
3257 idx = ev->u.del_flashnode.flashnode_idx;
3258 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3259 if (!fnode_sess) {
3260 pr_err("%s could not find flashnode %u for host no %u\n",
3261 __func__, idx, ev->u.del_flashnode.host_no);
3262 err = -ENODEV;
3263 goto put_host;
3264 }
3265
3266 err = transport->del_flashnode(fnode_sess);
3267 put_device(&fnode_sess->dev);
3268
3269 put_host:
3270 scsi_host_put(shost);
3271
3272 exit_del_fnode:
3273 return err;
3274 }
3275
3276 static int iscsi_login_flashnode(struct iscsi_transport *transport,
3277 struct iscsi_uevent *ev)
3278 {
3279 struct Scsi_Host *shost;
3280 struct iscsi_bus_flash_session *fnode_sess;
3281 struct iscsi_bus_flash_conn *fnode_conn;
3282 struct device *dev;
3283 uint32_t idx;
3284 int err = 0;
3285
3286 if (!transport->login_flashnode) {
3287 err = -ENOSYS;
3288 goto exit_login_fnode;
3289 }
3290
3291 shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
3292 if (!shost) {
3293 pr_err("%s could not find host no %u\n",
3294 __func__, ev->u.login_flashnode.host_no);
3295 err = -ENODEV;
3296 goto put_host;
3297 }
3298
3299 idx = ev->u.login_flashnode.flashnode_idx;
3300 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3301 if (!fnode_sess) {
3302 pr_err("%s could not find flashnode %u for host no %u\n",
3303 __func__, idx, ev->u.login_flashnode.host_no);
3304 err = -ENODEV;
3305 goto put_host;
3306 }
3307
3308 dev = iscsi_find_flashnode_conn(fnode_sess);
3309 if (!dev) {
3310 err = -ENODEV;
3311 goto put_sess;
3312 }
3313
3314 fnode_conn = iscsi_dev_to_flash_conn(dev);
3315 err = transport->login_flashnode(fnode_sess, fnode_conn);
3316 put_device(dev);
3317
3318 put_sess:
3319 put_device(&fnode_sess->dev);
3320
3321 put_host:
3322 scsi_host_put(shost);
3323
3324 exit_login_fnode:
3325 return err;
3326 }
3327
3328 static int iscsi_logout_flashnode(struct iscsi_transport *transport,
3329 struct iscsi_uevent *ev)
3330 {
3331 struct Scsi_Host *shost;
3332 struct iscsi_bus_flash_session *fnode_sess;
3333 struct iscsi_bus_flash_conn *fnode_conn;
3334 struct device *dev;
3335 uint32_t idx;
3336 int err = 0;
3337
3338 if (!transport->logout_flashnode) {
3339 err = -ENOSYS;
3340 goto exit_logout_fnode;
3341 }
3342
3343 shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
3344 if (!shost) {
3345 pr_err("%s could not find host no %u\n",
3346 __func__, ev->u.logout_flashnode.host_no);
3347 err = -ENODEV;
3348 goto put_host;
3349 }
3350
3351 idx = ev->u.logout_flashnode.flashnode_idx;
3352 fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
3353 if (!fnode_sess) {
3354 pr_err("%s could not find flashnode %u for host no %u\n",
3355 __func__, idx, ev->u.logout_flashnode.host_no);
3356 err = -ENODEV;
3357 goto put_host;
3358 }
3359
3360 dev = iscsi_find_flashnode_conn(fnode_sess);
3361 if (!dev) {
3362 err = -ENODEV;
3363 goto put_sess;
3364 }
3365
3366 fnode_conn = iscsi_dev_to_flash_conn(dev);
3367
3368 err = transport->logout_flashnode(fnode_sess, fnode_conn);
3369 put_device(dev);
3370
3371 put_sess:
3372 put_device(&fnode_sess->dev);
3373
3374 put_host:
3375 scsi_host_put(shost);
3376
3377 exit_logout_fnode:
3378 return err;
3379 }
3380
3381 static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
3382 struct iscsi_uevent *ev)
3383 {
3384 struct Scsi_Host *shost;
3385 struct iscsi_cls_session *session;
3386 int err = 0;
3387
3388 if (!transport->logout_flashnode_sid) {
3389 err = -ENOSYS;
3390 goto exit_logout_sid;
3391 }
3392
3393 shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
3394 if (!shost) {
3395 pr_err("%s could not find host no %u\n",
3396 __func__, ev->u.logout_flashnode.host_no);
3397 err = -ENODEV;
3398 goto put_host;
3399 }
3400
3401 session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
3402 if (!session) {
3403 pr_err("%s could not find session id %u\n",
3404 __func__, ev->u.logout_flashnode_sid.sid);
3405 err = -EINVAL;
3406 goto put_host;
3407 }
3408
3409 err = transport->logout_flashnode_sid(session);
3410
3411 put_host:
3412 scsi_host_put(shost);
3413
3414 exit_logout_sid:
3415 return err;
3416 }
3417
3418 static int
3419 iscsi_get_host_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
3420 {
3421 struct iscsi_uevent *ev = nlmsg_data(nlh);
3422 struct Scsi_Host *shost = NULL;
3423 struct iscsi_internal *priv;
3424 struct sk_buff *skbhost_stats;
3425 struct nlmsghdr *nlhhost_stats;
3426 struct iscsi_uevent *evhost_stats;
3427 int host_stats_size = 0;
3428 int len, err = 0;
3429 char *buf;
3430
3431 if (!transport->get_host_stats)
3432 return -ENOSYS;
3433
3434 priv = iscsi_if_transport_lookup(transport);
3435 if (!priv)
3436 return -EINVAL;
3437
3438 host_stats_size = sizeof(struct iscsi_offload_host_stats);
3439 len = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3440
3441 shost = scsi_host_lookup(ev->u.get_host_stats.host_no);
3442 if (!shost) {
3443 pr_err("%s: failed. Cound not find host no %u\n",
3444 __func__, ev->u.get_host_stats.host_no);
3445 return -ENODEV;
3446 }
3447
3448 do {
3449 int actual_size;
3450
3451 skbhost_stats = alloc_skb(len, GFP_KERNEL);
3452 if (!skbhost_stats) {
3453 pr_err("cannot deliver host stats: OOM\n");
3454 err = -ENOMEM;
3455 goto exit_host_stats;
3456 }
3457
3458 nlhhost_stats = __nlmsg_put(skbhost_stats, 0, 0, 0,
3459 (len - sizeof(*nlhhost_stats)), 0);
3460 evhost_stats = nlmsg_data(nlhhost_stats);
3461 memset(evhost_stats, 0, sizeof(*evhost_stats));
3462 evhost_stats->transport_handle = iscsi_handle(transport);
3463 evhost_stats->type = nlh->nlmsg_type;
3464 evhost_stats->u.get_host_stats.host_no =
3465 ev->u.get_host_stats.host_no;
3466 buf = (char *)evhost_stats + sizeof(*evhost_stats);
3467 memset(buf, 0, host_stats_size);
3468
3469 err = transport->get_host_stats(shost, buf, host_stats_size);
3470 if (err) {
3471 kfree_skb(skbhost_stats);
3472 goto exit_host_stats;
3473 }
3474
3475 actual_size = nlmsg_total_size(sizeof(*ev) + host_stats_size);
3476 skb_trim(skbhost_stats, NLMSG_ALIGN(actual_size));
3477 nlhhost_stats->nlmsg_len = actual_size;
3478
3479 err = iscsi_multicast_skb(skbhost_stats, ISCSI_NL_GRP_ISCSID,
3480 GFP_KERNEL);
3481 } while (err < 0 && err != -ECONNREFUSED);
3482
3483 exit_host_stats:
3484 scsi_host_put(shost);
3485 return err;
3486 }
3487
3488
3489 static int
3490 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
3491 {
3492 int err = 0;
3493 struct iscsi_uevent *ev = nlmsg_data(nlh);
3494 struct iscsi_transport *transport = NULL;
3495 struct iscsi_internal *priv;
3496 struct iscsi_cls_session *session;
3497 struct iscsi_cls_conn *conn;
3498 struct iscsi_endpoint *ep = NULL;
3499
3500 if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
3501 *group = ISCSI_NL_GRP_UIP;
3502 else
3503 *group = ISCSI_NL_GRP_ISCSID;
3504
3505 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
3506 if (!priv)
3507 return -EINVAL;
3508 transport = priv->iscsi_transport;
3509
3510 if (!try_module_get(transport->owner))
3511 return -EINVAL;
3512
3513 switch (nlh->nlmsg_type) {
3514 case ISCSI_UEVENT_CREATE_SESSION:
3515 err = iscsi_if_create_session(priv, ep, ev,
3516 NETLINK_CB(skb).portid,
3517 ev->u.c_session.initial_cmdsn,
3518 ev->u.c_session.cmds_max,
3519 ev->u.c_session.queue_depth);
3520 break;
3521 case ISCSI_UEVENT_CREATE_BOUND_SESSION:
3522 ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
3523 if (!ep) {
3524 err = -EINVAL;
3525 break;
3526 }
3527
3528 err = iscsi_if_create_session(priv, ep, ev,
3529 NETLINK_CB(skb).portid,
3530 ev->u.c_bound_session.initial_cmdsn,
3531 ev->u.c_bound_session.cmds_max,
3532 ev->u.c_bound_session.queue_depth);
3533 break;
3534 case ISCSI_UEVENT_DESTROY_SESSION:
3535 session = iscsi_session_lookup(ev->u.d_session.sid);
3536 if (session)
3537 transport->destroy_session(session);
3538 else
3539 err = -EINVAL;
3540 break;
3541 case ISCSI_UEVENT_UNBIND_SESSION:
3542 session = iscsi_session_lookup(ev->u.d_session.sid);
3543 if (session)
3544 scsi_queue_work(iscsi_session_to_shost(session),
3545 &session->unbind_work);
3546 else
3547 err = -EINVAL;
3548 break;
3549 case ISCSI_UEVENT_CREATE_CONN:
3550 err = iscsi_if_create_conn(transport, ev);
3551 break;
3552 case ISCSI_UEVENT_DESTROY_CONN:
3553 err = iscsi_if_destroy_conn(transport, ev);
3554 break;
3555 case ISCSI_UEVENT_BIND_CONN:
3556 session = iscsi_session_lookup(ev->u.b_conn.sid);
3557 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
3558
3559 if (conn && conn->ep)
3560 iscsi_if_ep_disconnect(transport, conn->ep->id);
3561
3562 if (!session || !conn) {
3563 err = -EINVAL;
3564 break;
3565 }
3566
3567 ev->r.retcode = transport->bind_conn(session, conn,
3568 ev->u.b_conn.transport_eph,
3569 ev->u.b_conn.is_leading);
3570 if (ev->r.retcode || !transport->ep_connect)
3571 break;
3572
3573 ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
3574 if (ep) {
3575 ep->conn = conn;
3576
3577 mutex_lock(&conn->ep_mutex);
3578 conn->ep = ep;
3579 mutex_unlock(&conn->ep_mutex);
3580 } else
3581 iscsi_cls_conn_printk(KERN_ERR, conn,
3582 "Could not set ep conn "
3583 "binding\n");
3584 break;
3585 case ISCSI_UEVENT_SET_PARAM:
3586 err = iscsi_set_param(transport, ev);
3587 break;
3588 case ISCSI_UEVENT_START_CONN:
3589 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
3590 if (conn)
3591 ev->r.retcode = transport->start_conn(conn);
3592 else
3593 err = -EINVAL;
3594 break;
3595 case ISCSI_UEVENT_STOP_CONN:
3596 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
3597 if (conn)
3598 transport->stop_conn(conn, ev->u.stop_conn.flag);
3599 else
3600 err = -EINVAL;
3601 break;
3602 case ISCSI_UEVENT_SEND_PDU:
3603 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
3604 if (conn)
3605 ev->r.retcode = transport->send_pdu(conn,
3606 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
3607 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
3608 ev->u.send_pdu.data_size);
3609 else
3610 err = -EINVAL;
3611 break;
3612 case ISCSI_UEVENT_GET_STATS:
3613 err = iscsi_if_get_stats(transport, nlh);
3614 break;
3615 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
3616 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
3617 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
3618 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
3619 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
3620 break;
3621 case ISCSI_UEVENT_TGT_DSCVR:
3622 err = iscsi_tgt_dscvr(transport, ev);
3623 break;
3624 case ISCSI_UEVENT_SET_HOST_PARAM:
3625 err = iscsi_set_host_param(transport, ev);
3626 break;
3627 case ISCSI_UEVENT_PATH_UPDATE:
3628 err = iscsi_set_path(transport, ev);
3629 break;
3630 case ISCSI_UEVENT_SET_IFACE_PARAMS:
3631 err = iscsi_set_iface_params(transport, ev,
3632 nlmsg_attrlen(nlh, sizeof(*ev)));
3633 break;
3634 case ISCSI_UEVENT_PING:
3635 err = iscsi_send_ping(transport, ev);
3636 break;
3637 case ISCSI_UEVENT_GET_CHAP:
3638 err = iscsi_get_chap(transport, nlh);
3639 break;
3640 case ISCSI_UEVENT_DELETE_CHAP:
3641 err = iscsi_delete_chap(transport, ev);
3642 break;
3643 case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
3644 err = iscsi_set_flashnode_param(transport, ev,
3645 nlmsg_attrlen(nlh,
3646 sizeof(*ev)));
3647 break;
3648 case ISCSI_UEVENT_NEW_FLASHNODE:
3649 err = iscsi_new_flashnode(transport, ev,
3650 nlmsg_attrlen(nlh, sizeof(*ev)));
3651 break;
3652 case ISCSI_UEVENT_DEL_FLASHNODE:
3653 err = iscsi_del_flashnode(transport, ev);
3654 break;
3655 case ISCSI_UEVENT_LOGIN_FLASHNODE:
3656 err = iscsi_login_flashnode(transport, ev);
3657 break;
3658 case ISCSI_UEVENT_LOGOUT_FLASHNODE:
3659 err = iscsi_logout_flashnode(transport, ev);
3660 break;
3661 case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
3662 err = iscsi_logout_flashnode_sid(transport, ev);
3663 break;
3664 case ISCSI_UEVENT_SET_CHAP:
3665 err = iscsi_set_chap(transport, ev,
3666 nlmsg_attrlen(nlh, sizeof(*ev)));
3667 break;
3668 case ISCSI_UEVENT_GET_HOST_STATS:
3669 err = iscsi_get_host_stats(transport, nlh);
3670 break;
3671 default:
3672 err = -ENOSYS;
3673 break;
3674 }
3675
3676 module_put(transport->owner);
3677 return err;
3678 }
3679
3680 /*
3681 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
3682 * Malformed skbs with wrong lengths or invalid creds are not processed.
3683 */
3684 static void
3685 iscsi_if_rx(struct sk_buff *skb)
3686 {
3687 mutex_lock(&rx_queue_mutex);
3688 while (skb->len >= NLMSG_HDRLEN) {
3689 int err;
3690 uint32_t rlen;
3691 struct nlmsghdr *nlh;
3692 struct iscsi_uevent *ev;
3693 uint32_t group;
3694
3695 nlh = nlmsg_hdr(skb);
3696 if (nlh->nlmsg_len < sizeof(*nlh) ||
3697 skb->len < nlh->nlmsg_len) {
3698 break;
3699 }
3700
3701 ev = nlmsg_data(nlh);
3702 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
3703 if (rlen > skb->len)
3704 rlen = skb->len;
3705
3706 err = iscsi_if_recv_msg(skb, nlh, &group);
3707 if (err) {
3708 ev->type = ISCSI_KEVENT_IF_ERROR;
3709 ev->iferror = err;
3710 }
3711 do {
3712 /*
3713 * special case for GET_STATS:
3714 * on success - sending reply and stats from
3715 * inside of if_recv_msg(),
3716 * on error - fall through.
3717 */
3718 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
3719 break;
3720 if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
3721 break;
3722 err = iscsi_if_send_reply(group, nlh->nlmsg_seq,
3723 nlh->nlmsg_type, 0, 0, ev, sizeof(*ev));
3724 } while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
3725 skb_pull(skb, rlen);
3726 }
3727 mutex_unlock(&rx_queue_mutex);
3728 }
3729
3730 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
3731 struct device_attribute dev_attr_##_prefix##_##_name = \
3732 __ATTR(_name,_mode,_show,_store)
3733
3734 /*
3735 * iSCSI connection attrs
3736 */
3737 #define iscsi_conn_attr_show(param) \
3738 static ssize_t \
3739 show_conn_param_##param(struct device *dev, \
3740 struct device_attribute *attr, char *buf) \
3741 { \
3742 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3743 struct iscsi_transport *t = conn->transport; \
3744 return t->get_conn_param(conn, param, buf); \
3745 }
3746
3747 #define iscsi_conn_attr(field, param) \
3748 iscsi_conn_attr_show(param) \
3749 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
3750 NULL);
3751
3752 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
3753 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
3754 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
3755 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
3756 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
3757 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
3758 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
3759 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
3760 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
3761 iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
3762 iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
3763 iscsi_conn_attr(local_port, ISCSI_PARAM_LOCAL_PORT);
3764 iscsi_conn_attr(statsn, ISCSI_PARAM_STATSN);
3765 iscsi_conn_attr(keepalive_tmo, ISCSI_PARAM_KEEPALIVE_TMO);
3766 iscsi_conn_attr(max_segment_size, ISCSI_PARAM_MAX_SEGMENT_SIZE);
3767 iscsi_conn_attr(tcp_timestamp_stat, ISCSI_PARAM_TCP_TIMESTAMP_STAT);
3768 iscsi_conn_attr(tcp_wsf_disable, ISCSI_PARAM_TCP_WSF_DISABLE);
3769 iscsi_conn_attr(tcp_nagle_disable, ISCSI_PARAM_TCP_NAGLE_DISABLE);
3770 iscsi_conn_attr(tcp_timer_scale, ISCSI_PARAM_TCP_TIMER_SCALE);
3771 iscsi_conn_attr(tcp_timestamp_enable, ISCSI_PARAM_TCP_TIMESTAMP_EN);
3772 iscsi_conn_attr(fragment_disable, ISCSI_PARAM_IP_FRAGMENT_DISABLE);
3773 iscsi_conn_attr(ipv4_tos, ISCSI_PARAM_IPV4_TOS);
3774 iscsi_conn_attr(ipv6_traffic_class, ISCSI_PARAM_IPV6_TC);
3775 iscsi_conn_attr(ipv6_flow_label, ISCSI_PARAM_IPV6_FLOW_LABEL);
3776 iscsi_conn_attr(is_fw_assigned_ipv6, ISCSI_PARAM_IS_FW_ASSIGNED_IPV6);
3777 iscsi_conn_attr(tcp_xmit_wsf, ISCSI_PARAM_TCP_XMIT_WSF);
3778 iscsi_conn_attr(tcp_recv_wsf, ISCSI_PARAM_TCP_RECV_WSF);
3779 iscsi_conn_attr(local_ipaddr, ISCSI_PARAM_LOCAL_IPADDR);
3780
3781
3782 #define iscsi_conn_ep_attr_show(param) \
3783 static ssize_t show_conn_ep_param_##param(struct device *dev, \
3784 struct device_attribute *attr,\
3785 char *buf) \
3786 { \
3787 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
3788 struct iscsi_transport *t = conn->transport; \
3789 struct iscsi_endpoint *ep; \
3790 ssize_t rc; \
3791 \
3792 /* \
3793 * Need to make sure ep_disconnect does not free the LLD's \
3794 * interconnect resources while we are trying to read them. \
3795 */ \
3796 mutex_lock(&conn->ep_mutex); \
3797 ep = conn->ep; \
3798 if (!ep && t->ep_connect) { \
3799 mutex_unlock(&conn->ep_mutex); \
3800 return -ENOTCONN; \
3801 } \
3802 \
3803 if (ep) \
3804 rc = t->get_ep_param(ep, param, buf); \
3805 else \
3806 rc = t->get_conn_param(conn, param, buf); \
3807 mutex_unlock(&conn->ep_mutex); \
3808 return rc; \
3809 }
3810
3811 #define iscsi_conn_ep_attr(field, param) \
3812 iscsi_conn_ep_attr_show(param) \
3813 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
3814 show_conn_ep_param_##param, NULL);
3815
3816 iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
3817 iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
3818
3819 static struct attribute *iscsi_conn_attrs[] = {
3820 &dev_attr_conn_max_recv_dlength.attr,
3821 &dev_attr_conn_max_xmit_dlength.attr,
3822 &dev_attr_conn_header_digest.attr,
3823 &dev_attr_conn_data_digest.attr,
3824 &dev_attr_conn_ifmarker.attr,
3825 &dev_attr_conn_ofmarker.attr,
3826 &dev_attr_conn_address.attr,
3827 &dev_attr_conn_port.attr,
3828 &dev_attr_conn_exp_statsn.attr,
3829 &dev_attr_conn_persistent_address.attr,
3830 &dev_attr_conn_persistent_port.attr,
3831 &dev_attr_conn_ping_tmo.attr,
3832 &dev_attr_conn_recv_tmo.attr,
3833 &dev_attr_conn_local_port.attr,
3834 &dev_attr_conn_statsn.attr,
3835 &dev_attr_conn_keepalive_tmo.attr,
3836 &dev_attr_conn_max_segment_size.attr,
3837 &dev_attr_conn_tcp_timestamp_stat.attr,
3838 &dev_attr_conn_tcp_wsf_disable.attr,
3839 &dev_attr_conn_tcp_nagle_disable.attr,
3840 &dev_attr_conn_tcp_timer_scale.attr,
3841 &dev_attr_conn_tcp_timestamp_enable.attr,
3842 &dev_attr_conn_fragment_disable.attr,
3843 &dev_attr_conn_ipv4_tos.attr,
3844 &dev_attr_conn_ipv6_traffic_class.attr,
3845 &dev_attr_conn_ipv6_flow_label.attr,
3846 &dev_attr_conn_is_fw_assigned_ipv6.attr,
3847 &dev_attr_conn_tcp_xmit_wsf.attr,
3848 &dev_attr_conn_tcp_recv_wsf.attr,
3849 &dev_attr_conn_local_ipaddr.attr,
3850 NULL,
3851 };
3852
3853 static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
3854 struct attribute *attr, int i)
3855 {
3856 struct device *cdev = container_of(kobj, struct device, kobj);
3857 struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
3858 struct iscsi_transport *t = conn->transport;
3859 int param;
3860
3861 if (attr == &dev_attr_conn_max_recv_dlength.attr)
3862 param = ISCSI_PARAM_MAX_RECV_DLENGTH;
3863 else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
3864 param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
3865 else if (attr == &dev_attr_conn_header_digest.attr)
3866 param = ISCSI_PARAM_HDRDGST_EN;
3867 else if (attr == &dev_attr_conn_data_digest.attr)
3868 param = ISCSI_PARAM_DATADGST_EN;
3869 else if (attr == &dev_attr_conn_ifmarker.attr)
3870 param = ISCSI_PARAM_IFMARKER_EN;
3871 else if (attr == &dev_attr_conn_ofmarker.attr)
3872 param = ISCSI_PARAM_OFMARKER_EN;
3873 else if (attr == &dev_attr_conn_address.attr)
3874 param = ISCSI_PARAM_CONN_ADDRESS;
3875 else if (attr == &dev_attr_conn_port.attr)
3876 param = ISCSI_PARAM_CONN_PORT;
3877 else if (attr == &dev_attr_conn_exp_statsn.attr)
3878 param = ISCSI_PARAM_EXP_STATSN;
3879 else if (attr == &dev_attr_conn_persistent_address.attr)
3880 param = ISCSI_PARAM_PERSISTENT_ADDRESS;
3881 else if (attr == &dev_attr_conn_persistent_port.attr)
3882 param = ISCSI_PARAM_PERSISTENT_PORT;
3883 else if (attr == &dev_attr_conn_ping_tmo.attr)
3884 param = ISCSI_PARAM_PING_TMO;
3885 else if (attr == &dev_attr_conn_recv_tmo.attr)
3886 param = ISCSI_PARAM_RECV_TMO;
3887 else if (attr == &dev_attr_conn_local_port.attr)
3888 param = ISCSI_PARAM_LOCAL_PORT;
3889 else if (attr == &dev_attr_conn_statsn.attr)
3890 param = ISCSI_PARAM_STATSN;
3891 else if (attr == &dev_attr_conn_keepalive_tmo.attr)
3892 param = ISCSI_PARAM_KEEPALIVE_TMO;
3893 else if (attr == &dev_attr_conn_max_segment_size.attr)
3894 param = ISCSI_PARAM_MAX_SEGMENT_SIZE;
3895 else if (attr == &dev_attr_conn_tcp_timestamp_stat.attr)
3896 param = ISCSI_PARAM_TCP_TIMESTAMP_STAT;
3897 else if (attr == &dev_attr_conn_tcp_wsf_disable.attr)
3898 param = ISCSI_PARAM_TCP_WSF_DISABLE;
3899 else if (attr == &dev_attr_conn_tcp_nagle_disable.attr)
3900 param = ISCSI_PARAM_TCP_NAGLE_DISABLE;
3901 else if (attr == &dev_attr_conn_tcp_timer_scale.attr)
3902 param = ISCSI_PARAM_TCP_TIMER_SCALE;
3903 else if (attr == &dev_attr_conn_tcp_timestamp_enable.attr)
3904 param = ISCSI_PARAM_TCP_TIMESTAMP_EN;
3905 else if (attr == &dev_attr_conn_fragment_disable.attr)
3906 param = ISCSI_PARAM_IP_FRAGMENT_DISABLE;
3907 else if (attr == &dev_attr_conn_ipv4_tos.attr)
3908 param = ISCSI_PARAM_IPV4_TOS;
3909 else if (attr == &dev_attr_conn_ipv6_traffic_class.attr)
3910 param = ISCSI_PARAM_IPV6_TC;
3911 else if (attr == &dev_attr_conn_ipv6_flow_label.attr)
3912 param = ISCSI_PARAM_IPV6_FLOW_LABEL;
3913 else if (attr == &dev_attr_conn_is_fw_assigned_ipv6.attr)
3914 param = ISCSI_PARAM_IS_FW_ASSIGNED_IPV6;
3915 else if (attr == &dev_attr_conn_tcp_xmit_wsf.attr)
3916 param = ISCSI_PARAM_TCP_XMIT_WSF;
3917 else if (attr == &dev_attr_conn_tcp_recv_wsf.attr)
3918 param = ISCSI_PARAM_TCP_RECV_WSF;
3919 else if (attr == &dev_attr_conn_local_ipaddr.attr)
3920 param = ISCSI_PARAM_LOCAL_IPADDR;
3921 else {
3922 WARN_ONCE(1, "Invalid conn attr");
3923 return 0;
3924 }
3925
3926 return t->attr_is_visible(ISCSI_PARAM, param);
3927 }
3928
3929 static struct attribute_group iscsi_conn_group = {
3930 .attrs = iscsi_conn_attrs,
3931 .is_visible = iscsi_conn_attr_is_visible,
3932 };
3933
3934 /*
3935 * iSCSI session attrs
3936 */
3937 #define iscsi_session_attr_show(param, perm) \
3938 static ssize_t \
3939 show_session_param_##param(struct device *dev, \
3940 struct device_attribute *attr, char *buf) \
3941 { \
3942 struct iscsi_cls_session *session = \
3943 iscsi_dev_to_session(dev->parent); \
3944 struct iscsi_transport *t = session->transport; \
3945 \
3946 if (perm && !capable(CAP_SYS_ADMIN)) \
3947 return -EACCES; \
3948 return t->get_session_param(session, param, buf); \
3949 }
3950
3951 #define iscsi_session_attr(field, param, perm) \
3952 iscsi_session_attr_show(param, perm) \
3953 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
3954 NULL);
3955 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
3956 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
3957 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
3958 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
3959 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
3960 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
3961 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
3962 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
3963 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
3964 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
3965 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
3966 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
3967 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
3968 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
3969 iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
3970 iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
3971 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
3972 iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
3973 iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
3974 iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
3975 iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
3976 iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
3977 iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
3978 iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
3979 iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
3980 iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
3981 iscsi_session_attr(auto_snd_tgt_disable, ISCSI_PARAM_AUTO_SND_TGT_DISABLE, 0);
3982 iscsi_session_attr(discovery_session, ISCSI_PARAM_DISCOVERY_SESS, 0);
3983 iscsi_session_attr(portal_type, ISCSI_PARAM_PORTAL_TYPE, 0);
3984 iscsi_session_attr(chap_auth, ISCSI_PARAM_CHAP_AUTH_EN, 0);
3985 iscsi_session_attr(discovery_logout, ISCSI_PARAM_DISCOVERY_LOGOUT_EN, 0);
3986 iscsi_session_attr(bidi_chap, ISCSI_PARAM_BIDI_CHAP_EN, 0);
3987 iscsi_session_attr(discovery_auth_optional,
3988 ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL, 0);
3989 iscsi_session_attr(def_time2wait, ISCSI_PARAM_DEF_TIME2WAIT, 0);
3990 iscsi_session_attr(def_time2retain, ISCSI_PARAM_DEF_TIME2RETAIN, 0);
3991 iscsi_session_attr(isid, ISCSI_PARAM_ISID, 0);
3992 iscsi_session_attr(tsid, ISCSI_PARAM_TSID, 0);
3993 iscsi_session_attr(def_taskmgmt_tmo, ISCSI_PARAM_DEF_TASKMGMT_TMO, 0);
3994 iscsi_session_attr(discovery_parent_idx, ISCSI_PARAM_DISCOVERY_PARENT_IDX, 0);
3995 iscsi_session_attr(discovery_parent_type, ISCSI_PARAM_DISCOVERY_PARENT_TYPE, 0);
3996
3997 static ssize_t
3998 show_priv_session_state(struct device *dev, struct device_attribute *attr,
3999 char *buf)
4000 {
4001 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4002 return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
4003 }
4004 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
4005 NULL);
4006 static ssize_t
4007 show_priv_session_creator(struct device *dev, struct device_attribute *attr,
4008 char *buf)
4009 {
4010 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4011 return sprintf(buf, "%d\n", session->creator);
4012 }
4013 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
4014 NULL);
4015 static ssize_t
4016 show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
4017 char *buf)
4018 {
4019 struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
4020 return sprintf(buf, "%d\n", session->target_id);
4021 }
4022 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
4023 show_priv_session_target_id, NULL);
4024
4025 #define iscsi_priv_session_attr_show(field, format) \
4026 static ssize_t \
4027 show_priv_session_##field(struct device *dev, \
4028 struct device_attribute *attr, char *buf) \
4029 { \
4030 struct iscsi_cls_session *session = \
4031 iscsi_dev_to_session(dev->parent); \
4032 if (session->field == -1) \
4033 return sprintf(buf, "off\n"); \
4034 return sprintf(buf, format"\n", session->field); \
4035 }
4036
4037 #define iscsi_priv_session_attr_store(field) \
4038 static ssize_t \
4039 store_priv_session_##field(struct device *dev, \
4040 struct device_attribute *attr, \
4041 const char *buf, size_t count) \
4042 { \
4043 int val; \
4044 char *cp; \
4045 struct iscsi_cls_session *session = \
4046 iscsi_dev_to_session(dev->parent); \
4047 if ((session->state == ISCSI_SESSION_FREE) || \
4048 (session->state == ISCSI_SESSION_FAILED)) \
4049 return -EBUSY; \
4050 if (strncmp(buf, "off", 3) == 0) \
4051 session->field = -1; \
4052 else { \
4053 val = simple_strtoul(buf, &cp, 0); \
4054 if (*cp != '\0' && *cp != '\n') \
4055 return -EINVAL; \
4056 session->field = val; \
4057 } \
4058 return count; \
4059 }
4060
4061 #define iscsi_priv_session_rw_attr(field, format) \
4062 iscsi_priv_session_attr_show(field, format) \
4063 iscsi_priv_session_attr_store(field) \
4064 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
4065 show_priv_session_##field, \
4066 store_priv_session_##field)
4067 iscsi_priv_session_rw_attr(recovery_tmo, "%d");
4068
4069 static struct attribute *iscsi_session_attrs[] = {
4070 &dev_attr_sess_initial_r2t.attr,
4071 &dev_attr_sess_max_outstanding_r2t.attr,
4072 &dev_attr_sess_immediate_data.attr,
4073 &dev_attr_sess_first_burst_len.attr,
4074 &dev_attr_sess_max_burst_len.attr,
4075 &dev_attr_sess_data_pdu_in_order.attr,
4076 &dev_attr_sess_data_seq_in_order.attr,
4077 &dev_attr_sess_erl.attr,
4078 &dev_attr_sess_targetname.attr,
4079 &dev_attr_sess_tpgt.attr,
4080 &dev_attr_sess_password.attr,
4081 &dev_attr_sess_password_in.attr,
4082 &dev_attr_sess_username.attr,
4083 &dev_attr_sess_username_in.attr,
4084 &dev_attr_sess_fast_abort.attr,
4085 &dev_attr_sess_abort_tmo.attr,
4086 &dev_attr_sess_lu_reset_tmo.attr,
4087 &dev_attr_sess_tgt_reset_tmo.attr,
4088 &dev_attr_sess_ifacename.attr,
4089 &dev_attr_sess_initiatorname.attr,
4090 &dev_attr_sess_targetalias.attr,
4091 &dev_attr_sess_boot_root.attr,
4092 &dev_attr_sess_boot_nic.attr,
4093 &dev_attr_sess_boot_target.attr,
4094 &dev_attr_priv_sess_recovery_tmo.attr,
4095 &dev_attr_priv_sess_state.attr,
4096 &dev_attr_priv_sess_creator.attr,
4097 &dev_attr_sess_chap_out_idx.attr,
4098 &dev_attr_sess_chap_in_idx.attr,
4099 &dev_attr_priv_sess_target_id.attr,
4100 &dev_attr_sess_auto_snd_tgt_disable.attr,
4101 &dev_attr_sess_discovery_session.attr,
4102 &dev_attr_sess_portal_type.attr,
4103 &dev_attr_sess_chap_auth.attr,
4104 &dev_attr_sess_discovery_logout.attr,
4105 &dev_attr_sess_bidi_chap.attr,
4106 &dev_attr_sess_discovery_auth_optional.attr,
4107 &dev_attr_sess_def_time2wait.attr,
4108 &dev_attr_sess_def_time2retain.attr,
4109 &dev_attr_sess_isid.attr,
4110 &dev_attr_sess_tsid.attr,
4111 &dev_attr_sess_def_taskmgmt_tmo.attr,
4112 &dev_attr_sess_discovery_parent_idx.attr,
4113 &dev_attr_sess_discovery_parent_type.attr,
4114 NULL,
4115 };
4116
4117 static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
4118 struct attribute *attr, int i)
4119 {
4120 struct device *cdev = container_of(kobj, struct device, kobj);
4121 struct iscsi_cls_session *session = transport_class_to_session(cdev);
4122 struct iscsi_transport *t = session->transport;
4123 int param;
4124
4125 if (attr == &dev_attr_sess_initial_r2t.attr)
4126 param = ISCSI_PARAM_INITIAL_R2T_EN;
4127 else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
4128 param = ISCSI_PARAM_MAX_R2T;
4129 else if (attr == &dev_attr_sess_immediate_data.attr)
4130 param = ISCSI_PARAM_IMM_DATA_EN;
4131 else if (attr == &dev_attr_sess_first_burst_len.attr)
4132 param = ISCSI_PARAM_FIRST_BURST;
4133 else if (attr == &dev_attr_sess_max_burst_len.attr)
4134 param = ISCSI_PARAM_MAX_BURST;
4135 else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
4136 param = ISCSI_PARAM_PDU_INORDER_EN;
4137 else if (attr == &dev_attr_sess_data_seq_in_order.attr)
4138 param = ISCSI_PARAM_DATASEQ_INORDER_EN;
4139 else if (attr == &dev_attr_sess_erl.attr)
4140 param = ISCSI_PARAM_ERL;
4141 else if (attr == &dev_attr_sess_targetname.attr)
4142 param = ISCSI_PARAM_TARGET_NAME;
4143 else if (attr == &dev_attr_sess_tpgt.attr)
4144 param = ISCSI_PARAM_TPGT;
4145 else if (attr == &dev_attr_sess_chap_in_idx.attr)
4146 param = ISCSI_PARAM_CHAP_IN_IDX;
4147 else if (attr == &dev_attr_sess_chap_out_idx.attr)
4148 param = ISCSI_PARAM_CHAP_OUT_IDX;
4149 else if (attr == &dev_attr_sess_password.attr)
4150 param = ISCSI_PARAM_USERNAME;
4151 else if (attr == &dev_attr_sess_password_in.attr)
4152 param = ISCSI_PARAM_USERNAME_IN;
4153 else if (attr == &dev_attr_sess_username.attr)
4154 param = ISCSI_PARAM_PASSWORD;
4155 else if (attr == &dev_attr_sess_username_in.attr)
4156 param = ISCSI_PARAM_PASSWORD_IN;
4157 else if (attr == &dev_attr_sess_fast_abort.attr)
4158 param = ISCSI_PARAM_FAST_ABORT;
4159 else if (attr == &dev_attr_sess_abort_tmo.attr)
4160 param = ISCSI_PARAM_ABORT_TMO;
4161 else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
4162 param = ISCSI_PARAM_LU_RESET_TMO;
4163 else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
4164 param = ISCSI_PARAM_TGT_RESET_TMO;
4165 else if (attr == &dev_attr_sess_ifacename.attr)
4166 param = ISCSI_PARAM_IFACE_NAME;
4167 else if (attr == &dev_attr_sess_initiatorname.attr)
4168 param = ISCSI_PARAM_INITIATOR_NAME;
4169 else if (attr == &dev_attr_sess_targetalias.attr)
4170 param = ISCSI_PARAM_TARGET_ALIAS;
4171 else if (attr == &dev_attr_sess_boot_root.attr)
4172 param = ISCSI_PARAM_BOOT_ROOT;
4173 else if (attr == &dev_attr_sess_boot_nic.attr)
4174 param = ISCSI_PARAM_BOOT_NIC;
4175 else if (attr == &dev_attr_sess_boot_target.attr)
4176 param = ISCSI_PARAM_BOOT_TARGET;
4177 else if (attr == &dev_attr_sess_auto_snd_tgt_disable.attr)
4178 param = ISCSI_PARAM_AUTO_SND_TGT_DISABLE;
4179 else if (attr == &dev_attr_sess_discovery_session.attr)
4180 param = ISCSI_PARAM_DISCOVERY_SESS;
4181 else if (attr == &dev_attr_sess_portal_type.attr)
4182 param = ISCSI_PARAM_PORTAL_TYPE;
4183 else if (attr == &dev_attr_sess_chap_auth.attr)
4184 param = ISCSI_PARAM_CHAP_AUTH_EN;
4185 else if (attr == &dev_attr_sess_discovery_logout.attr)
4186 param = ISCSI_PARAM_DISCOVERY_LOGOUT_EN;
4187 else if (attr == &dev_attr_sess_bidi_chap.attr)
4188 param = ISCSI_PARAM_BIDI_CHAP_EN;
4189 else if (attr == &dev_attr_sess_discovery_auth_optional.attr)
4190 param = ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL;
4191 else if (attr == &dev_attr_sess_def_time2wait.attr)
4192 param = ISCSI_PARAM_DEF_TIME2WAIT;
4193 else if (attr == &dev_attr_sess_def_time2retain.attr)
4194 param = ISCSI_PARAM_DEF_TIME2RETAIN;
4195 else if (attr == &dev_attr_sess_isid.attr)
4196 param = ISCSI_PARAM_ISID;
4197 else if (attr == &dev_attr_sess_tsid.attr)
4198 param = ISCSI_PARAM_TSID;
4199 else if (attr == &dev_attr_sess_def_taskmgmt_tmo.attr)
4200 param = ISCSI_PARAM_DEF_TASKMGMT_TMO;
4201 else if (attr == &dev_attr_sess_discovery_parent_idx.attr)
4202 param = ISCSI_PARAM_DISCOVERY_PARENT_IDX;
4203 else if (attr == &dev_attr_sess_discovery_parent_type.attr)
4204 param = ISCSI_PARAM_DISCOVERY_PARENT_TYPE;
4205 else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
4206 return S_IRUGO | S_IWUSR;
4207 else if (attr == &dev_attr_priv_sess_state.attr)
4208 return S_IRUGO;
4209 else if (attr == &dev_attr_priv_sess_creator.attr)
4210 return S_IRUGO;
4211 else if (attr == &dev_attr_priv_sess_target_id.attr)
4212 return S_IRUGO;
4213 else {
4214 WARN_ONCE(1, "Invalid session attr");
4215 return 0;
4216 }
4217
4218 return t->attr_is_visible(ISCSI_PARAM, param);
4219 }
4220
4221 static struct attribute_group iscsi_session_group = {
4222 .attrs = iscsi_session_attrs,
4223 .is_visible = iscsi_session_attr_is_visible,
4224 };
4225
4226 /*
4227 * iSCSI host attrs
4228 */
4229 #define iscsi_host_attr_show(param) \
4230 static ssize_t \
4231 show_host_param_##param(struct device *dev, \
4232 struct device_attribute *attr, char *buf) \
4233 { \
4234 struct Scsi_Host *shost = transport_class_to_shost(dev); \
4235 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
4236 return priv->iscsi_transport->get_host_param(shost, param, buf); \
4237 }
4238
4239 #define iscsi_host_attr(field, param) \
4240 iscsi_host_attr_show(param) \
4241 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
4242 NULL);
4243
4244 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
4245 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
4246 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
4247 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
4248 iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
4249 iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
4250
4251 static struct attribute *iscsi_host_attrs[] = {
4252 &dev_attr_host_netdev.attr,
4253 &dev_attr_host_hwaddress.attr,
4254 &dev_attr_host_ipaddress.attr,
4255 &dev_attr_host_initiatorname.attr,
4256 &dev_attr_host_port_state.attr,
4257 &dev_attr_host_port_speed.attr,
4258 NULL,
4259 };
4260
4261 static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
4262 struct attribute *attr, int i)
4263 {
4264 struct device *cdev = container_of(kobj, struct device, kobj);
4265 struct Scsi_Host *shost = transport_class_to_shost(cdev);
4266 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
4267 int param;
4268
4269 if (attr == &dev_attr_host_netdev.attr)
4270 param = ISCSI_HOST_PARAM_NETDEV_NAME;
4271 else if (attr == &dev_attr_host_hwaddress.attr)
4272 param = ISCSI_HOST_PARAM_HWADDRESS;
4273 else if (attr == &dev_attr_host_ipaddress.attr)
4274 param = ISCSI_HOST_PARAM_IPADDRESS;
4275 else if (attr == &dev_attr_host_initiatorname.attr)
4276 param = ISCSI_HOST_PARAM_INITIATOR_NAME;
4277 else if (attr == &dev_attr_host_port_state.attr)
4278 param = ISCSI_HOST_PARAM_PORT_STATE;
4279 else if (attr == &dev_attr_host_port_speed.attr)
4280 param = ISCSI_HOST_PARAM_PORT_SPEED;
4281 else {
4282 WARN_ONCE(1, "Invalid host attr");
4283 return 0;
4284 }
4285
4286 return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
4287 }
4288
4289 static struct attribute_group iscsi_host_group = {
4290 .attrs = iscsi_host_attrs,
4291 .is_visible = iscsi_host_attr_is_visible,
4292 };
4293
4294 /* convert iscsi_port_speed values to ascii string name */
4295 static const struct {
4296 enum iscsi_port_speed value;
4297 char *name;
4298 } iscsi_port_speed_names[] = {
4299 {ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
4300 {ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
4301 {ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
4302 {ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
4303 {ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
4304 };
4305
4306 char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
4307 {
4308 int i;
4309 char *speed = "Unknown!";
4310 struct iscsi_cls_host *ihost = shost->shost_data;
4311 uint32_t port_speed = ihost->port_speed;
4312
4313 for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
4314 if (iscsi_port_speed_names[i].value & port_speed) {
4315 speed = iscsi_port_speed_names[i].name;
4316 break;
4317 }
4318 }
4319 return speed;
4320 }
4321 EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
4322
4323 /* convert iscsi_port_state values to ascii string name */
4324 static const struct {
4325 enum iscsi_port_state value;
4326 char *name;
4327 } iscsi_port_state_names[] = {
4328 {ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
4329 {ISCSI_PORT_STATE_UP, "LINK UP" },
4330 };
4331
4332 char *iscsi_get_port_state_name(struct Scsi_Host *shost)
4333 {
4334 int i;
4335 char *state = "Unknown!";
4336 struct iscsi_cls_host *ihost = shost->shost_data;
4337 uint32_t port_state = ihost->port_state;
4338
4339 for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
4340 if (iscsi_port_state_names[i].value & port_state) {
4341 state = iscsi_port_state_names[i].name;
4342 break;
4343 }
4344 }
4345 return state;
4346 }
4347 EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
4348
4349 static int iscsi_session_match(struct attribute_container *cont,
4350 struct device *dev)
4351 {
4352 struct iscsi_cls_session *session;
4353 struct Scsi_Host *shost;
4354 struct iscsi_internal *priv;
4355
4356 if (!iscsi_is_session_dev(dev))
4357 return 0;
4358
4359 session = iscsi_dev_to_session(dev);
4360 shost = iscsi_session_to_shost(session);
4361 if (!shost->transportt)
4362 return 0;
4363
4364 priv = to_iscsi_internal(shost->transportt);
4365 if (priv->session_cont.ac.class != &iscsi_session_class.class)
4366 return 0;
4367
4368 return &priv->session_cont.ac == cont;
4369 }
4370
4371 static int iscsi_conn_match(struct attribute_container *cont,
4372 struct device *dev)
4373 {
4374 struct iscsi_cls_session *session;
4375 struct iscsi_cls_conn *conn;
4376 struct Scsi_Host *shost;
4377 struct iscsi_internal *priv;
4378
4379 if (!iscsi_is_conn_dev(dev))
4380 return 0;
4381
4382 conn = iscsi_dev_to_conn(dev);
4383 session = iscsi_dev_to_session(conn->dev.parent);
4384 shost = iscsi_session_to_shost(session);
4385
4386 if (!shost->transportt)
4387 return 0;
4388
4389 priv = to_iscsi_internal(shost->transportt);
4390 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
4391 return 0;
4392
4393 return &priv->conn_cont.ac == cont;
4394 }
4395
4396 static int iscsi_host_match(struct attribute_container *cont,
4397 struct device *dev)
4398 {
4399 struct Scsi_Host *shost;
4400 struct iscsi_internal *priv;
4401
4402 if (!scsi_is_host_device(dev))
4403 return 0;
4404
4405 shost = dev_to_shost(dev);
4406 if (!shost->transportt ||
4407 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
4408 return 0;
4409
4410 priv = to_iscsi_internal(shost->transportt);
4411 return &priv->t.host_attrs.ac == cont;
4412 }
4413
4414 struct scsi_transport_template *
4415 iscsi_register_transport(struct iscsi_transport *tt)
4416 {
4417 struct iscsi_internal *priv;
4418 unsigned long flags;
4419 int err;
4420
4421 BUG_ON(!tt);
4422
4423 priv = iscsi_if_transport_lookup(tt);
4424 if (priv)
4425 return NULL;
4426
4427 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
4428 if (!priv)
4429 return NULL;
4430 INIT_LIST_HEAD(&priv->list);
4431 priv->iscsi_transport = tt;
4432 priv->t.user_scan = iscsi_user_scan;
4433 priv->t.create_work_queue = 1;
4434
4435 priv->dev.class = &iscsi_transport_class;
4436 dev_set_name(&priv->dev, "%s", tt->name);
4437 err = device_register(&priv->dev);
4438 if (err)
4439 goto free_priv;
4440
4441 err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
4442 if (err)
4443 goto unregister_dev;
4444
4445 /* host parameters */
4446 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
4447 priv->t.host_attrs.ac.match = iscsi_host_match;
4448 priv->t.host_attrs.ac.grp = &iscsi_host_group;
4449 priv->t.host_size = sizeof(struct iscsi_cls_host);
4450 transport_container_register(&priv->t.host_attrs);
4451
4452 /* connection parameters */
4453 priv->conn_cont.ac.class = &iscsi_connection_class.class;
4454 priv->conn_cont.ac.match = iscsi_conn_match;
4455 priv->conn_cont.ac.grp = &iscsi_conn_group;
4456 transport_container_register(&priv->conn_cont);
4457
4458 /* session parameters */
4459 priv->session_cont.ac.class = &iscsi_session_class.class;
4460 priv->session_cont.ac.match = iscsi_session_match;
4461 priv->session_cont.ac.grp = &iscsi_session_group;
4462 transport_container_register(&priv->session_cont);
4463
4464 spin_lock_irqsave(&iscsi_transport_lock, flags);
4465 list_add(&priv->list, &iscsi_transports);
4466 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4467
4468 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
4469 return &priv->t;
4470
4471 unregister_dev:
4472 device_unregister(&priv->dev);
4473 return NULL;
4474 free_priv:
4475 kfree(priv);
4476 return NULL;
4477 }
4478 EXPORT_SYMBOL_GPL(iscsi_register_transport);
4479
4480 int iscsi_unregister_transport(struct iscsi_transport *tt)
4481 {
4482 struct iscsi_internal *priv;
4483 unsigned long flags;
4484
4485 BUG_ON(!tt);
4486
4487 mutex_lock(&rx_queue_mutex);
4488
4489 priv = iscsi_if_transport_lookup(tt);
4490 BUG_ON (!priv);
4491
4492 spin_lock_irqsave(&iscsi_transport_lock, flags);
4493 list_del(&priv->list);
4494 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
4495
4496 transport_container_unregister(&priv->conn_cont);
4497 transport_container_unregister(&priv->session_cont);
4498 transport_container_unregister(&priv->t.host_attrs);
4499
4500 sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
4501 device_unregister(&priv->dev);
4502 mutex_unlock(&rx_queue_mutex);
4503
4504 return 0;
4505 }
4506 EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
4507
4508 static __init int iscsi_transport_init(void)
4509 {
4510 int err;
4511 struct netlink_kernel_cfg cfg = {
4512 .groups = 1,
4513 .input = iscsi_if_rx,
4514 };
4515 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
4516 ISCSI_TRANSPORT_VERSION);
4517
4518 atomic_set(&iscsi_session_nr, 0);
4519
4520 err = class_register(&iscsi_transport_class);
4521 if (err)
4522 return err;
4523
4524 err = class_register(&iscsi_endpoint_class);
4525 if (err)
4526 goto unregister_transport_class;
4527
4528 err = class_register(&iscsi_iface_class);
4529 if (err)
4530 goto unregister_endpoint_class;
4531
4532 err = transport_class_register(&iscsi_host_class);
4533 if (err)
4534 goto unregister_iface_class;
4535
4536 err = transport_class_register(&iscsi_connection_class);
4537 if (err)
4538 goto unregister_host_class;
4539
4540 err = transport_class_register(&iscsi_session_class);
4541 if (err)
4542 goto unregister_conn_class;
4543
4544 err = bus_register(&iscsi_flashnode_bus);
4545 if (err)
4546 goto unregister_session_class;
4547
4548 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
4549 if (!nls) {
4550 err = -ENOBUFS;
4551 goto unregister_flashnode_bus;
4552 }
4553
4554 iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh");
4555 if (!iscsi_eh_timer_workq) {
4556 err = -ENOMEM;
4557 goto release_nls;
4558 }
4559
4560 return 0;
4561
4562 release_nls:
4563 netlink_kernel_release(nls);
4564 unregister_flashnode_bus:
4565 bus_unregister(&iscsi_flashnode_bus);
4566 unregister_session_class:
4567 transport_class_unregister(&iscsi_session_class);
4568 unregister_conn_class:
4569 transport_class_unregister(&iscsi_connection_class);
4570 unregister_host_class:
4571 transport_class_unregister(&iscsi_host_class);
4572 unregister_iface_class:
4573 class_unregister(&iscsi_iface_class);
4574 unregister_endpoint_class:
4575 class_unregister(&iscsi_endpoint_class);
4576 unregister_transport_class:
4577 class_unregister(&iscsi_transport_class);
4578 return err;
4579 }
4580
4581 static void __exit iscsi_transport_exit(void)
4582 {
4583 destroy_workqueue(iscsi_eh_timer_workq);
4584 netlink_kernel_release(nls);
4585 bus_unregister(&iscsi_flashnode_bus);
4586 transport_class_unregister(&iscsi_connection_class);
4587 transport_class_unregister(&iscsi_session_class);
4588 transport_class_unregister(&iscsi_host_class);
4589 class_unregister(&iscsi_endpoint_class);
4590 class_unregister(&iscsi_iface_class);
4591 class_unregister(&iscsi_transport_class);
4592 }
4593
4594 module_init(iscsi_transport_init);
4595 module_exit(iscsi_transport_exit);
4596
4597 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
4598 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
4599 "Alex Aizman <itn780@yahoo.com>");
4600 MODULE_DESCRIPTION("iSCSI Transport Interface");
4601 MODULE_LICENSE("GPL");
4602 MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
4603 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);
(deprecated) Btrfs devel tree