2 * FiberChannel transport specific attributes exported to sysfs.
4 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * Copyright (C) 2004-2007 James Smart, Emulex Corporation
23 * Rewrite for host, target, device, and remote port attributes,
24 * statistics, and service functions...
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/delay.h>
32 #include <linux/kernel.h>
33 #include <scsi/scsi_device.h>
34 #include <scsi/scsi_host.h>
35 #include <scsi/scsi_transport.h>
36 #include <scsi/scsi_transport_fc.h>
37 #include <scsi/scsi_cmnd.h>
38 #include <linux/netlink.h>
39 #include <net/netlink.h>
40 #include <scsi/scsi_netlink_fc.h>
41 #include <scsi/scsi_bsg_fc.h>
42 #include "scsi_priv.h"
43 #include "scsi_transport_fc_internal.h"
45 static int fc_queue_work(struct Scsi_Host
*, struct work_struct
*);
46 static void fc_vport_sched_delete(struct work_struct
*work
);
47 static int fc_vport_setup(struct Scsi_Host
*shost
, int channel
,
48 struct device
*pdev
, struct fc_vport_identifiers
*ids
,
49 struct fc_vport
**vport
);
50 static int fc_bsg_hostadd(struct Scsi_Host
*, struct fc_host_attrs
*);
51 static int fc_bsg_rportadd(struct Scsi_Host
*, struct fc_rport
*);
52 static void fc_bsg_remove(struct request_queue
*);
53 static void fc_bsg_goose_queue(struct fc_rport
*);
60 * dev_loss_tmo: the default number of seconds that the FC transport
61 * should insulate the loss of a remote port.
62 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
64 static unsigned int fc_dev_loss_tmo
= 60; /* seconds */
66 module_param_named(dev_loss_tmo
, fc_dev_loss_tmo
, uint
, S_IRUGO
|S_IWUSR
);
67 MODULE_PARM_DESC(dev_loss_tmo
,
68 "Maximum number of seconds that the FC transport should"
69 " insulate the loss of a remote port. Once this value is"
70 " exceeded, the scsi target is removed. Value should be"
71 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
72 " fast_io_fail_tmo is not set.");
75 * Redefine so that we can have same named attributes in the
76 * sdev/starget/host objects.
78 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
79 struct device_attribute device_attr_##_prefix##_##_name = \
80 __ATTR(_name,_mode,_show,_store)
82 #define fc_enum_name_search(title, table_type, table) \
83 static const char *get_fc_##title##_name(enum table_type table_key) \
88 for (i = 0; i < ARRAY_SIZE(table); i++) { \
89 if (table[i].value == table_key) { \
90 name = table[i].name; \
97 #define fc_enum_name_match(title, table_type, table) \
98 static int get_fc_##title##_match(const char *table_key, \
99 enum table_type *value) \
103 for (i = 0; i < ARRAY_SIZE(table); i++) { \
104 if (strncmp(table_key, table[i].name, \
105 table[i].matchlen) == 0) { \
106 *value = table[i].value; \
107 return 0; /* success */ \
110 return 1; /* failure */ \
114 /* Convert fc_port_type values to ascii string name */
116 enum fc_port_type value
;
118 } fc_port_type_names
[] = {
119 { FC_PORTTYPE_UNKNOWN
, "Unknown" },
120 { FC_PORTTYPE_OTHER
, "Other" },
121 { FC_PORTTYPE_NOTPRESENT
, "Not Present" },
122 { FC_PORTTYPE_NPORT
, "NPort (fabric via point-to-point)" },
123 { FC_PORTTYPE_NLPORT
, "NLPort (fabric via loop)" },
124 { FC_PORTTYPE_LPORT
, "LPort (private loop)" },
125 { FC_PORTTYPE_PTP
, "Point-To-Point (direct nport connection)" },
126 { FC_PORTTYPE_NPIV
, "NPIV VPORT" },
128 fc_enum_name_search(port_type
, fc_port_type
, fc_port_type_names
)
129 #define FC_PORTTYPE_MAX_NAMELEN 50
131 /* Reuse fc_port_type enum function for vport_type */
132 #define get_fc_vport_type_name get_fc_port_type_name
135 /* Convert fc_host_event_code values to ascii string name */
136 static const struct {
137 enum fc_host_event_code value
;
139 } fc_host_event_code_names
[] = {
140 { FCH_EVT_LIP
, "lip" },
141 { FCH_EVT_LINKUP
, "link_up" },
142 { FCH_EVT_LINKDOWN
, "link_down" },
143 { FCH_EVT_LIPRESET
, "lip_reset" },
144 { FCH_EVT_RSCN
, "rscn" },
145 { FCH_EVT_ADAPTER_CHANGE
, "adapter_chg" },
146 { FCH_EVT_PORT_UNKNOWN
, "port_unknown" },
147 { FCH_EVT_PORT_ONLINE
, "port_online" },
148 { FCH_EVT_PORT_OFFLINE
, "port_offline" },
149 { FCH_EVT_PORT_FABRIC
, "port_fabric" },
150 { FCH_EVT_LINK_UNKNOWN
, "link_unknown" },
151 { FCH_EVT_VENDOR_UNIQUE
, "vendor_unique" },
153 fc_enum_name_search(host_event_code
, fc_host_event_code
,
154 fc_host_event_code_names
)
155 #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
158 /* Convert fc_port_state values to ascii string name */
160 enum fc_port_state value
;
162 } fc_port_state_names
[] = {
163 { FC_PORTSTATE_UNKNOWN
, "Unknown" },
164 { FC_PORTSTATE_NOTPRESENT
, "Not Present" },
165 { FC_PORTSTATE_ONLINE
, "Online" },
166 { FC_PORTSTATE_OFFLINE
, "Offline" },
167 { FC_PORTSTATE_BLOCKED
, "Blocked" },
168 { FC_PORTSTATE_BYPASSED
, "Bypassed" },
169 { FC_PORTSTATE_DIAGNOSTICS
, "Diagnostics" },
170 { FC_PORTSTATE_LINKDOWN
, "Linkdown" },
171 { FC_PORTSTATE_ERROR
, "Error" },
172 { FC_PORTSTATE_LOOPBACK
, "Loopback" },
173 { FC_PORTSTATE_DELETED
, "Deleted" },
175 fc_enum_name_search(port_state
, fc_port_state
, fc_port_state_names
)
176 #define FC_PORTSTATE_MAX_NAMELEN 20
179 /* Convert fc_vport_state values to ascii string name */
181 enum fc_vport_state value
;
183 } fc_vport_state_names
[] = {
184 { FC_VPORT_UNKNOWN
, "Unknown" },
185 { FC_VPORT_ACTIVE
, "Active" },
186 { FC_VPORT_DISABLED
, "Disabled" },
187 { FC_VPORT_LINKDOWN
, "Linkdown" },
188 { FC_VPORT_INITIALIZING
, "Initializing" },
189 { FC_VPORT_NO_FABRIC_SUPP
, "No Fabric Support" },
190 { FC_VPORT_NO_FABRIC_RSCS
, "No Fabric Resources" },
191 { FC_VPORT_FABRIC_LOGOUT
, "Fabric Logout" },
192 { FC_VPORT_FABRIC_REJ_WWN
, "Fabric Rejected WWN" },
193 { FC_VPORT_FAILED
, "VPort Failed" },
195 fc_enum_name_search(vport_state
, fc_vport_state
, fc_vport_state_names
)
196 #define FC_VPORTSTATE_MAX_NAMELEN 24
198 /* Reuse fc_vport_state enum function for vport_last_state */
199 #define get_fc_vport_last_state_name get_fc_vport_state_name
202 /* Convert fc_tgtid_binding_type values to ascii string name */
203 static const struct {
204 enum fc_tgtid_binding_type value
;
207 } fc_tgtid_binding_type_names
[] = {
208 { FC_TGTID_BIND_NONE
, "none", 4 },
209 { FC_TGTID_BIND_BY_WWPN
, "wwpn (World Wide Port Name)", 4 },
210 { FC_TGTID_BIND_BY_WWNN
, "wwnn (World Wide Node Name)", 4 },
211 { FC_TGTID_BIND_BY_ID
, "port_id (FC Address)", 7 },
213 fc_enum_name_search(tgtid_bind_type
, fc_tgtid_binding_type
,
214 fc_tgtid_binding_type_names
)
215 fc_enum_name_match(tgtid_bind_type
, fc_tgtid_binding_type
,
216 fc_tgtid_binding_type_names
)
217 #define FC_BINDTYPE_MAX_NAMELEN 30
220 #define fc_bitfield_name_search(title, table) \
222 get_fc_##title##_names(u32 table_key, char *buf) \
228 for (i = 0; i < ARRAY_SIZE(table); i++) { \
229 if (table[i].value & table_key) { \
230 len += sprintf(buf + len, "%s%s", \
231 prefix, table[i].name); \
235 len += sprintf(buf + len, "\n"); \
240 /* Convert FC_COS bit values to ascii string name */
241 static const struct {
245 { FC_COS_CLASS1
, "Class 1" },
246 { FC_COS_CLASS2
, "Class 2" },
247 { FC_COS_CLASS3
, "Class 3" },
248 { FC_COS_CLASS4
, "Class 4" },
249 { FC_COS_CLASS6
, "Class 6" },
251 fc_bitfield_name_search(cos
, fc_cos_names
)
254 /* Convert FC_PORTSPEED bit values to ascii string name */
255 static const struct {
258 } fc_port_speed_names
[] = {
259 { FC_PORTSPEED_1GBIT
, "1 Gbit" },
260 { FC_PORTSPEED_2GBIT
, "2 Gbit" },
261 { FC_PORTSPEED_4GBIT
, "4 Gbit" },
262 { FC_PORTSPEED_10GBIT
, "10 Gbit" },
263 { FC_PORTSPEED_8GBIT
, "8 Gbit" },
264 { FC_PORTSPEED_16GBIT
, "16 Gbit" },
265 { FC_PORTSPEED_NOT_NEGOTIATED
, "Not Negotiated" },
267 fc_bitfield_name_search(port_speed
, fc_port_speed_names
)
271 show_fc_fc4s (char *buf
, u8
*fc4_list
)
275 for (i
= 0; i
< FC_FC4_LIST_SIZE
; i
++, fc4_list
++)
276 len
+= sprintf(buf
+ len
, "0x%02x ", *fc4_list
);
277 len
+= sprintf(buf
+ len
, "\n");
282 /* Convert FC_PORT_ROLE bit values to ascii string name */
283 static const struct {
286 } fc_port_role_names
[] = {
287 { FC_PORT_ROLE_FCP_TARGET
, "FCP Target" },
288 { FC_PORT_ROLE_FCP_INITIATOR
, "FCP Initiator" },
289 { FC_PORT_ROLE_IP_PORT
, "IP Port" },
291 fc_bitfield_name_search(port_roles
, fc_port_role_names
)
294 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
296 #define FC_WELLKNOWN_PORTID_MASK 0xfffff0
297 #define FC_WELLKNOWN_ROLE_MASK 0x00000f
298 #define FC_FPORT_PORTID 0x00000e
299 #define FC_FABCTLR_PORTID 0x00000d
300 #define FC_DIRSRVR_PORTID 0x00000c
301 #define FC_TIMESRVR_PORTID 0x00000b
302 #define FC_MGMTSRVR_PORTID 0x00000a
305 static void fc_timeout_deleted_rport(struct work_struct
*work
);
306 static void fc_timeout_fail_rport_io(struct work_struct
*work
);
307 static void fc_scsi_scan_rport(struct work_struct
*work
);
310 * Attribute counts pre object type...
311 * Increase these values if you add attributes
313 #define FC_STARGET_NUM_ATTRS 3
314 #define FC_RPORT_NUM_ATTRS 10
315 #define FC_VPORT_NUM_ATTRS 9
316 #define FC_HOST_NUM_ATTRS 29
319 struct scsi_transport_template t
;
320 struct fc_function_template
*f
;
323 * For attributes : each object has :
324 * An array of the actual attributes structures
325 * An array of null-terminated pointers to the attribute
326 * structures - used for mid-layer interaction.
328 * The attribute containers for the starget and host are are
329 * part of the midlayer. As the remote port is specific to the
330 * fc transport, we must provide the attribute container.
332 struct device_attribute private_starget_attrs
[
333 FC_STARGET_NUM_ATTRS
];
334 struct device_attribute
*starget_attrs
[FC_STARGET_NUM_ATTRS
+ 1];
336 struct device_attribute private_host_attrs
[FC_HOST_NUM_ATTRS
];
337 struct device_attribute
*host_attrs
[FC_HOST_NUM_ATTRS
+ 1];
339 struct transport_container rport_attr_cont
;
340 struct device_attribute private_rport_attrs
[FC_RPORT_NUM_ATTRS
];
341 struct device_attribute
*rport_attrs
[FC_RPORT_NUM_ATTRS
+ 1];
343 struct transport_container vport_attr_cont
;
344 struct device_attribute private_vport_attrs
[FC_VPORT_NUM_ATTRS
];
345 struct device_attribute
*vport_attrs
[FC_VPORT_NUM_ATTRS
+ 1];
348 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
350 static int fc_target_setup(struct transport_container
*tc
, struct device
*dev
,
353 struct scsi_target
*starget
= to_scsi_target(dev
);
354 struct fc_rport
*rport
= starget_to_rport(starget
);
357 * if parent is remote port, use values from remote port.
358 * Otherwise, this host uses the fc_transport, but not the
359 * remote port interface. As such, initialize to known non-values.
362 fc_starget_node_name(starget
) = rport
->node_name
;
363 fc_starget_port_name(starget
) = rport
->port_name
;
364 fc_starget_port_id(starget
) = rport
->port_id
;
366 fc_starget_node_name(starget
) = -1;
367 fc_starget_port_name(starget
) = -1;
368 fc_starget_port_id(starget
) = -1;
374 static DECLARE_TRANSPORT_CLASS(fc_transport_class
,
380 static int fc_host_setup(struct transport_container
*tc
, struct device
*dev
,
383 struct Scsi_Host
*shost
= dev_to_shost(dev
);
384 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
387 * Set default values easily detected by the midlayer as
388 * failure cases. The scsi lldd is responsible for initializing
389 * all transport attributes to valid values per host.
391 fc_host
->node_name
= -1;
392 fc_host
->port_name
= -1;
393 fc_host
->permanent_port_name
= -1;
394 fc_host
->supported_classes
= FC_COS_UNSPECIFIED
;
395 memset(fc_host
->supported_fc4s
, 0,
396 sizeof(fc_host
->supported_fc4s
));
397 fc_host
->supported_speeds
= FC_PORTSPEED_UNKNOWN
;
398 fc_host
->maxframe_size
= -1;
399 fc_host
->max_npiv_vports
= 0;
400 memset(fc_host
->serial_number
, 0,
401 sizeof(fc_host
->serial_number
));
402 memset(fc_host
->manufacturer
, 0,
403 sizeof(fc_host
->manufacturer
));
404 memset(fc_host
->model
, 0,
405 sizeof(fc_host
->model
));
406 memset(fc_host
->model_description
, 0,
407 sizeof(fc_host
->model_description
));
408 memset(fc_host
->hardware_version
, 0,
409 sizeof(fc_host
->hardware_version
));
410 memset(fc_host
->driver_version
, 0,
411 sizeof(fc_host
->driver_version
));
412 memset(fc_host
->firmware_version
, 0,
413 sizeof(fc_host
->firmware_version
));
414 memset(fc_host
->optionrom_version
, 0,
415 sizeof(fc_host
->optionrom_version
));
417 fc_host
->port_id
= -1;
418 fc_host
->port_type
= FC_PORTTYPE_UNKNOWN
;
419 fc_host
->port_state
= FC_PORTSTATE_UNKNOWN
;
420 memset(fc_host
->active_fc4s
, 0,
421 sizeof(fc_host
->active_fc4s
));
422 fc_host
->speed
= FC_PORTSPEED_UNKNOWN
;
423 fc_host
->fabric_name
= -1;
424 memset(fc_host
->symbolic_name
, 0, sizeof(fc_host
->symbolic_name
));
425 memset(fc_host
->system_hostname
, 0, sizeof(fc_host
->system_hostname
));
427 fc_host
->tgtid_bind_type
= FC_TGTID_BIND_BY_WWPN
;
429 INIT_LIST_HEAD(&fc_host
->rports
);
430 INIT_LIST_HEAD(&fc_host
->rport_bindings
);
431 INIT_LIST_HEAD(&fc_host
->vports
);
432 fc_host
->next_rport_number
= 0;
433 fc_host
->next_target_id
= 0;
434 fc_host
->next_vport_number
= 0;
435 fc_host
->npiv_vports_inuse
= 0;
437 snprintf(fc_host
->work_q_name
, sizeof(fc_host
->work_q_name
),
438 "fc_wq_%d", shost
->host_no
);
439 fc_host
->work_q
= alloc_workqueue(fc_host
->work_q_name
, 0, 0);
440 if (!fc_host
->work_q
)
443 fc_host
->dev_loss_tmo
= fc_dev_loss_tmo
;
444 snprintf(fc_host
->devloss_work_q_name
,
445 sizeof(fc_host
->devloss_work_q_name
),
446 "fc_dl_%d", shost
->host_no
);
447 fc_host
->devloss_work_q
=
448 alloc_workqueue(fc_host
->devloss_work_q_name
, 0, 0);
449 if (!fc_host
->devloss_work_q
) {
450 destroy_workqueue(fc_host
->work_q
);
451 fc_host
->work_q
= NULL
;
455 fc_bsg_hostadd(shost
, fc_host
);
456 /* ignore any bsg add error - we just can't do sgio */
461 static int fc_host_remove(struct transport_container
*tc
, struct device
*dev
,
464 struct Scsi_Host
*shost
= dev_to_shost(dev
);
465 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
467 fc_bsg_remove(fc_host
->rqst_q
);
471 static DECLARE_TRANSPORT_CLASS(fc_host_class
,
478 * Setup and Remove actions for remote ports are handled
479 * in the service functions below.
481 static DECLARE_TRANSPORT_CLASS(fc_rport_class
,
488 * Setup and Remove actions for virtual ports are handled
489 * in the service functions below.
491 static DECLARE_TRANSPORT_CLASS(fc_vport_class
,
498 * Netlink Infrastructure
501 static atomic_t fc_event_seq
;
504 * fc_get_event_number - Obtain the next sequential FC event number
507 * We could have inlined this, but it would have required fc_event_seq to
508 * be exposed. For now, live with the subroutine call.
509 * Atomic used to avoid lock/unlock...
512 fc_get_event_number(void)
514 return atomic_add_return(1, &fc_event_seq
);
516 EXPORT_SYMBOL(fc_get_event_number
);
520 * fc_host_post_event - called to post an even on an fc_host.
521 * @shost: host the event occurred on
522 * @event_number: fc event number obtained from get_fc_event_number()
523 * @event_code: fc_host event being posted
524 * @event_data: 32bits of data for the event being posted
527 * This routine assumes no locks are held on entry.
530 fc_host_post_event(struct Scsi_Host
*shost
, u32 event_number
,
531 enum fc_host_event_code event_code
, u32 event_data
)
534 struct nlmsghdr
*nlh
;
535 struct fc_nl_event
*event
;
545 len
= FC_NL_MSGALIGN(sizeof(*event
));
546 skblen
= NLMSG_SPACE(len
);
548 skb
= alloc_skb(skblen
, GFP_KERNEL
);
554 nlh
= nlmsg_put(skb
, 0, 0, SCSI_TRANSPORT_MSG
,
555 skblen
- sizeof(*nlh
), 0);
560 event
= NLMSG_DATA(nlh
);
562 INIT_SCSI_NL_HDR(&event
->snlh
, SCSI_NL_TRANSPORT_FC
,
563 FC_NL_ASYNC_EVENT
, len
);
564 event
->seconds
= get_seconds();
565 event
->vendor_id
= 0;
566 event
->host_no
= shost
->host_no
;
567 event
->event_datalen
= sizeof(u32
); /* bytes */
568 event
->event_num
= event_number
;
569 event
->event_code
= event_code
;
570 event
->event_data
= event_data
;
572 nlmsg_multicast(scsi_nl_sock
, skb
, 0, SCSI_NL_GRP_FC_EVENTS
,
579 name
= get_fc_host_event_code_name(event_code
);
581 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
582 __func__
, shost
->host_no
,
583 (name
) ? name
: "<unknown>", event_data
, err
);
586 EXPORT_SYMBOL(fc_host_post_event
);
590 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
591 * @shost: host the event occurred on
592 * @event_number: fc event number obtained from get_fc_event_number()
593 * @data_len: amount, in bytes, of vendor unique data
594 * @data_buf: pointer to vendor unique data
595 * @vendor_id: Vendor id
598 * This routine assumes no locks are held on entry.
601 fc_host_post_vendor_event(struct Scsi_Host
*shost
, u32 event_number
,
602 u32 data_len
, char * data_buf
, u64 vendor_id
)
605 struct nlmsghdr
*nlh
;
606 struct fc_nl_event
*event
;
612 goto send_vendor_fail
;
615 len
= FC_NL_MSGALIGN(sizeof(*event
) + data_len
);
616 skblen
= NLMSG_SPACE(len
);
618 skb
= alloc_skb(skblen
, GFP_KERNEL
);
621 goto send_vendor_fail
;
624 nlh
= nlmsg_put(skb
, 0, 0, SCSI_TRANSPORT_MSG
,
625 skblen
- sizeof(*nlh
), 0);
628 goto send_vendor_fail_skb
;
630 event
= NLMSG_DATA(nlh
);
632 INIT_SCSI_NL_HDR(&event
->snlh
, SCSI_NL_TRANSPORT_FC
,
633 FC_NL_ASYNC_EVENT
, len
);
634 event
->seconds
= get_seconds();
635 event
->vendor_id
= vendor_id
;
636 event
->host_no
= shost
->host_no
;
637 event
->event_datalen
= data_len
; /* bytes */
638 event
->event_num
= event_number
;
639 event
->event_code
= FCH_EVT_VENDOR_UNIQUE
;
640 memcpy(&event
->event_data
, data_buf
, data_len
);
642 nlmsg_multicast(scsi_nl_sock
, skb
, 0, SCSI_NL_GRP_FC_EVENTS
,
646 send_vendor_fail_skb
:
650 "%s: Dropped Event : host %d vendor_unique - err %d\n",
651 __func__
, shost
->host_no
, err
);
654 EXPORT_SYMBOL(fc_host_post_vendor_event
);
658 static __init
int fc_transport_init(void)
662 atomic_set(&fc_event_seq
, 0);
664 error
= transport_class_register(&fc_host_class
);
667 error
= transport_class_register(&fc_vport_class
);
669 goto unreg_host_class
;
670 error
= transport_class_register(&fc_rport_class
);
672 goto unreg_vport_class
;
673 error
= transport_class_register(&fc_transport_class
);
675 goto unreg_rport_class
;
679 transport_class_unregister(&fc_rport_class
);
681 transport_class_unregister(&fc_vport_class
);
683 transport_class_unregister(&fc_host_class
);
687 static void __exit
fc_transport_exit(void)
689 transport_class_unregister(&fc_transport_class
);
690 transport_class_unregister(&fc_rport_class
);
691 transport_class_unregister(&fc_host_class
);
692 transport_class_unregister(&fc_vport_class
);
696 * FC Remote Port Attribute Management
699 #define fc_rport_show_function(field, format_string, sz, cast) \
701 show_fc_rport_##field (struct device *dev, \
702 struct device_attribute *attr, char *buf) \
704 struct fc_rport *rport = transport_class_to_rport(dev); \
705 struct Scsi_Host *shost = rport_to_shost(rport); \
706 struct fc_internal *i = to_fc_internal(shost->transportt); \
707 if ((i->f->get_rport_##field) && \
708 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
709 (rport->port_state == FC_PORTSTATE_DELETED) || \
710 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
711 i->f->get_rport_##field(rport); \
712 return snprintf(buf, sz, format_string, cast rport->field); \
715 #define fc_rport_store_function(field) \
717 store_fc_rport_##field(struct device *dev, \
718 struct device_attribute *attr, \
719 const char *buf, size_t count) \
722 struct fc_rport *rport = transport_class_to_rport(dev); \
723 struct Scsi_Host *shost = rport_to_shost(rport); \
724 struct fc_internal *i = to_fc_internal(shost->transportt); \
726 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
727 (rport->port_state == FC_PORTSTATE_DELETED) || \
728 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
730 val = simple_strtoul(buf, &cp, 0); \
731 if (*cp && (*cp != '\n')) \
733 i->f->set_rport_##field(rport, val); \
737 #define fc_rport_rd_attr(field, format_string, sz) \
738 fc_rport_show_function(field, format_string, sz, ) \
739 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
740 show_fc_rport_##field, NULL)
742 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
743 fc_rport_show_function(field, format_string, sz, (cast)) \
744 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
745 show_fc_rport_##field, NULL)
747 #define fc_rport_rw_attr(field, format_string, sz) \
748 fc_rport_show_function(field, format_string, sz, ) \
749 fc_rport_store_function(field) \
750 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
751 show_fc_rport_##field, \
752 store_fc_rport_##field)
755 #define fc_private_rport_show_function(field, format_string, sz, cast) \
757 show_fc_rport_##field (struct device *dev, \
758 struct device_attribute *attr, char *buf) \
760 struct fc_rport *rport = transport_class_to_rport(dev); \
761 return snprintf(buf, sz, format_string, cast rport->field); \
764 #define fc_private_rport_rd_attr(field, format_string, sz) \
765 fc_private_rport_show_function(field, format_string, sz, ) \
766 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
767 show_fc_rport_##field, NULL)
769 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
770 fc_private_rport_show_function(field, format_string, sz, (cast)) \
771 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
772 show_fc_rport_##field, NULL)
775 #define fc_private_rport_rd_enum_attr(title, maxlen) \
777 show_fc_rport_##title (struct device *dev, \
778 struct device_attribute *attr, char *buf) \
780 struct fc_rport *rport = transport_class_to_rport(dev); \
782 name = get_fc_##title##_name(rport->title); \
785 return snprintf(buf, maxlen, "%s\n", name); \
787 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
788 show_fc_rport_##title, NULL)
791 #define SETUP_RPORT_ATTRIBUTE_RD(field) \
792 i->private_rport_attrs[count] = device_attr_rport_##field; \
793 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
794 i->private_rport_attrs[count].store = NULL; \
795 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
796 if (i->f->show_rport_##field) \
799 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
800 i->private_rport_attrs[count] = device_attr_rport_##field; \
801 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
802 i->private_rport_attrs[count].store = NULL; \
803 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
806 #define SETUP_RPORT_ATTRIBUTE_RW(field) \
807 i->private_rport_attrs[count] = device_attr_rport_##field; \
808 if (!i->f->set_rport_##field) { \
809 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
810 i->private_rport_attrs[count].store = NULL; \
812 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
813 if (i->f->show_rport_##field) \
816 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
818 i->private_rport_attrs[count] = device_attr_rport_##field; \
819 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
824 /* The FC Transport Remote Port Attributes: */
826 /* Fixed Remote Port Attributes */
828 fc_private_rport_rd_attr(maxframe_size
, "%u bytes\n", 20);
831 show_fc_rport_supported_classes (struct device
*dev
,
832 struct device_attribute
*attr
, char *buf
)
834 struct fc_rport
*rport
= transport_class_to_rport(dev
);
835 if (rport
->supported_classes
== FC_COS_UNSPECIFIED
)
836 return snprintf(buf
, 20, "unspecified\n");
837 return get_fc_cos_names(rport
->supported_classes
, buf
);
839 static FC_DEVICE_ATTR(rport
, supported_classes
, S_IRUGO
,
840 show_fc_rport_supported_classes
, NULL
);
842 /* Dynamic Remote Port Attributes */
845 * dev_loss_tmo attribute
847 static int fc_str_to_dev_loss(const char *buf
, unsigned long *val
)
851 *val
= simple_strtoul(buf
, &cp
, 0);
852 if ((*cp
&& (*cp
!= '\n')) || (*val
< 0))
855 * Check for overflow; dev_loss_tmo is u32
863 static int fc_rport_set_dev_loss_tmo(struct fc_rport
*rport
,
866 struct Scsi_Host
*shost
= rport_to_shost(rport
);
867 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
869 if ((rport
->port_state
== FC_PORTSTATE_BLOCKED
) ||
870 (rport
->port_state
== FC_PORTSTATE_DELETED
) ||
871 (rport
->port_state
== FC_PORTSTATE_NOTPRESENT
))
874 * Check for overflow; dev_loss_tmo is u32
880 * If fast_io_fail is off we have to cap
881 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
883 if (rport
->fast_io_fail_tmo
== -1 &&
884 val
> SCSI_DEVICE_BLOCK_MAX_TIMEOUT
)
887 i
->f
->set_rport_dev_loss_tmo(rport
, val
);
891 fc_rport_show_function(dev_loss_tmo
, "%d\n", 20, )
893 store_fc_rport_dev_loss_tmo(struct device
*dev
, struct device_attribute
*attr
,
894 const char *buf
, size_t count
)
896 struct fc_rport
*rport
= transport_class_to_rport(dev
);
900 rc
= fc_str_to_dev_loss(buf
, &val
);
904 rc
= fc_rport_set_dev_loss_tmo(rport
, val
);
909 static FC_DEVICE_ATTR(rport
, dev_loss_tmo
, S_IRUGO
| S_IWUSR
,
910 show_fc_rport_dev_loss_tmo
, store_fc_rport_dev_loss_tmo
);
913 /* Private Remote Port Attributes */
915 fc_private_rport_rd_attr_cast(node_name
, "0x%llx\n", 20, unsigned long long);
916 fc_private_rport_rd_attr_cast(port_name
, "0x%llx\n", 20, unsigned long long);
917 fc_private_rport_rd_attr(port_id
, "0x%06x\n", 20);
920 show_fc_rport_roles (struct device
*dev
, struct device_attribute
*attr
,
923 struct fc_rport
*rport
= transport_class_to_rport(dev
);
925 /* identify any roles that are port_id specific */
926 if ((rport
->port_id
!= -1) &&
927 (rport
->port_id
& FC_WELLKNOWN_PORTID_MASK
) ==
928 FC_WELLKNOWN_PORTID_MASK
) {
929 switch (rport
->port_id
& FC_WELLKNOWN_ROLE_MASK
) {
930 case FC_FPORT_PORTID
:
931 return snprintf(buf
, 30, "Fabric Port\n");
932 case FC_FABCTLR_PORTID
:
933 return snprintf(buf
, 30, "Fabric Controller\n");
934 case FC_DIRSRVR_PORTID
:
935 return snprintf(buf
, 30, "Directory Server\n");
936 case FC_TIMESRVR_PORTID
:
937 return snprintf(buf
, 30, "Time Server\n");
938 case FC_MGMTSRVR_PORTID
:
939 return snprintf(buf
, 30, "Management Server\n");
941 return snprintf(buf
, 30, "Unknown Fabric Entity\n");
944 if (rport
->roles
== FC_PORT_ROLE_UNKNOWN
)
945 return snprintf(buf
, 20, "unknown\n");
946 return get_fc_port_roles_names(rport
->roles
, buf
);
949 static FC_DEVICE_ATTR(rport
, roles
, S_IRUGO
,
950 show_fc_rport_roles
, NULL
);
952 fc_private_rport_rd_enum_attr(port_state
, FC_PORTSTATE_MAX_NAMELEN
);
953 fc_private_rport_rd_attr(scsi_target_id
, "%d\n", 20);
956 * fast_io_fail_tmo attribute
959 show_fc_rport_fast_io_fail_tmo (struct device
*dev
,
960 struct device_attribute
*attr
, char *buf
)
962 struct fc_rport
*rport
= transport_class_to_rport(dev
);
964 if (rport
->fast_io_fail_tmo
== -1)
965 return snprintf(buf
, 5, "off\n");
966 return snprintf(buf
, 20, "%d\n", rport
->fast_io_fail_tmo
);
970 store_fc_rport_fast_io_fail_tmo(struct device
*dev
,
971 struct device_attribute
*attr
, const char *buf
,
976 struct fc_rport
*rport
= transport_class_to_rport(dev
);
978 if ((rport
->port_state
== FC_PORTSTATE_BLOCKED
) ||
979 (rport
->port_state
== FC_PORTSTATE_DELETED
) ||
980 (rport
->port_state
== FC_PORTSTATE_NOTPRESENT
))
982 if (strncmp(buf
, "off", 3) == 0)
983 rport
->fast_io_fail_tmo
= -1;
985 val
= simple_strtoul(buf
, &cp
, 0);
986 if ((*cp
&& (*cp
!= '\n')) || (val
< 0))
989 * Cap fast_io_fail by dev_loss_tmo or
990 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
992 if ((val
>= rport
->dev_loss_tmo
) ||
993 (val
> SCSI_DEVICE_BLOCK_MAX_TIMEOUT
))
996 rport
->fast_io_fail_tmo
= val
;
1000 static FC_DEVICE_ATTR(rport
, fast_io_fail_tmo
, S_IRUGO
| S_IWUSR
,
1001 show_fc_rport_fast_io_fail_tmo
, store_fc_rport_fast_io_fail_tmo
);
1005 * FC SCSI Target Attribute Management
1009 * Note: in the target show function we recognize when the remote
1010 * port is in the hierarchy and do not allow the driver to get
1011 * involved in sysfs functions. The driver only gets involved if
1012 * it's the "old" style that doesn't use rports.
1014 #define fc_starget_show_function(field, format_string, sz, cast) \
1016 show_fc_starget_##field (struct device *dev, \
1017 struct device_attribute *attr, char *buf) \
1019 struct scsi_target *starget = transport_class_to_starget(dev); \
1020 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
1021 struct fc_internal *i = to_fc_internal(shost->transportt); \
1022 struct fc_rport *rport = starget_to_rport(starget); \
1024 fc_starget_##field(starget) = rport->field; \
1025 else if (i->f->get_starget_##field) \
1026 i->f->get_starget_##field(starget); \
1027 return snprintf(buf, sz, format_string, \
1028 cast fc_starget_##field(starget)); \
1031 #define fc_starget_rd_attr(field, format_string, sz) \
1032 fc_starget_show_function(field, format_string, sz, ) \
1033 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1034 show_fc_starget_##field, NULL)
1036 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
1037 fc_starget_show_function(field, format_string, sz, (cast)) \
1038 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1039 show_fc_starget_##field, NULL)
1041 #define SETUP_STARGET_ATTRIBUTE_RD(field) \
1042 i->private_starget_attrs[count] = device_attr_starget_##field; \
1043 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1044 i->private_starget_attrs[count].store = NULL; \
1045 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1046 if (i->f->show_starget_##field) \
1049 #define SETUP_STARGET_ATTRIBUTE_RW(field) \
1050 i->private_starget_attrs[count] = device_attr_starget_##field; \
1051 if (!i->f->set_starget_##field) { \
1052 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1053 i->private_starget_attrs[count].store = NULL; \
1055 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1056 if (i->f->show_starget_##field) \
1059 /* The FC Transport SCSI Target Attributes: */
1060 fc_starget_rd_attr_cast(node_name
, "0x%llx\n", 20, unsigned long long);
1061 fc_starget_rd_attr_cast(port_name
, "0x%llx\n", 20, unsigned long long);
1062 fc_starget_rd_attr(port_id
, "0x%06x\n", 20);
1066 * FC Virtual Port Attribute Management
1069 #define fc_vport_show_function(field, format_string, sz, cast) \
1071 show_fc_vport_##field (struct device *dev, \
1072 struct device_attribute *attr, char *buf) \
1074 struct fc_vport *vport = transport_class_to_vport(dev); \
1075 struct Scsi_Host *shost = vport_to_shost(vport); \
1076 struct fc_internal *i = to_fc_internal(shost->transportt); \
1077 if ((i->f->get_vport_##field) && \
1078 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1079 i->f->get_vport_##field(vport); \
1080 return snprintf(buf, sz, format_string, cast vport->field); \
1083 #define fc_vport_store_function(field) \
1085 store_fc_vport_##field(struct device *dev, \
1086 struct device_attribute *attr, \
1087 const char *buf, size_t count) \
1090 struct fc_vport *vport = transport_class_to_vport(dev); \
1091 struct Scsi_Host *shost = vport_to_shost(vport); \
1092 struct fc_internal *i = to_fc_internal(shost->transportt); \
1094 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1096 val = simple_strtoul(buf, &cp, 0); \
1097 if (*cp && (*cp != '\n')) \
1099 i->f->set_vport_##field(vport, val); \
1103 #define fc_vport_store_str_function(field, slen) \
1105 store_fc_vport_##field(struct device *dev, \
1106 struct device_attribute *attr, \
1107 const char *buf, size_t count) \
1109 struct fc_vport *vport = transport_class_to_vport(dev); \
1110 struct Scsi_Host *shost = vport_to_shost(vport); \
1111 struct fc_internal *i = to_fc_internal(shost->transportt); \
1112 unsigned int cnt=count; \
1114 /* count may include a LF at end of string */ \
1115 if (buf[cnt-1] == '\n') \
1117 if (cnt > ((slen) - 1)) \
1119 memcpy(vport->field, buf, cnt); \
1120 i->f->set_vport_##field(vport); \
1124 #define fc_vport_rd_attr(field, format_string, sz) \
1125 fc_vport_show_function(field, format_string, sz, ) \
1126 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1127 show_fc_vport_##field, NULL)
1129 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1130 fc_vport_show_function(field, format_string, sz, (cast)) \
1131 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1132 show_fc_vport_##field, NULL)
1134 #define fc_vport_rw_attr(field, format_string, sz) \
1135 fc_vport_show_function(field, format_string, sz, ) \
1136 fc_vport_store_function(field) \
1137 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1138 show_fc_vport_##field, \
1139 store_fc_vport_##field)
1141 #define fc_private_vport_show_function(field, format_string, sz, cast) \
1143 show_fc_vport_##field (struct device *dev, \
1144 struct device_attribute *attr, char *buf) \
1146 struct fc_vport *vport = transport_class_to_vport(dev); \
1147 return snprintf(buf, sz, format_string, cast vport->field); \
1150 #define fc_private_vport_store_u32_function(field) \
1152 store_fc_vport_##field(struct device *dev, \
1153 struct device_attribute *attr, \
1154 const char *buf, size_t count) \
1157 struct fc_vport *vport = transport_class_to_vport(dev); \
1159 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1161 val = simple_strtoul(buf, &cp, 0); \
1162 if (*cp && (*cp != '\n')) \
1164 vport->field = val; \
1169 #define fc_private_vport_rd_attr(field, format_string, sz) \
1170 fc_private_vport_show_function(field, format_string, sz, ) \
1171 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1172 show_fc_vport_##field, NULL)
1174 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1175 fc_private_vport_show_function(field, format_string, sz, (cast)) \
1176 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1177 show_fc_vport_##field, NULL)
1179 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1180 fc_private_vport_show_function(field, format_string, sz, ) \
1181 fc_private_vport_store_u32_function(field) \
1182 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1183 show_fc_vport_##field, \
1184 store_fc_vport_##field)
1187 #define fc_private_vport_rd_enum_attr(title, maxlen) \
1189 show_fc_vport_##title (struct device *dev, \
1190 struct device_attribute *attr, \
1193 struct fc_vport *vport = transport_class_to_vport(dev); \
1195 name = get_fc_##title##_name(vport->title); \
1198 return snprintf(buf, maxlen, "%s\n", name); \
1200 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
1201 show_fc_vport_##title, NULL)
1204 #define SETUP_VPORT_ATTRIBUTE_RD(field) \
1205 i->private_vport_attrs[count] = device_attr_vport_##field; \
1206 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1207 i->private_vport_attrs[count].store = NULL; \
1208 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1209 if (i->f->get_##field) \
1211 /* NOTE: Above MACRO differs: checks function not show bit */
1213 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
1214 i->private_vport_attrs[count] = device_attr_vport_##field; \
1215 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1216 i->private_vport_attrs[count].store = NULL; \
1217 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1220 #define SETUP_VPORT_ATTRIBUTE_WR(field) \
1221 i->private_vport_attrs[count] = device_attr_vport_##field; \
1222 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1225 /* NOTE: Above MACRO differs: checks function */
1227 #define SETUP_VPORT_ATTRIBUTE_RW(field) \
1228 i->private_vport_attrs[count] = device_attr_vport_##field; \
1229 if (!i->f->set_vport_##field) { \
1230 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1231 i->private_vport_attrs[count].store = NULL; \
1233 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1235 /* NOTE: Above MACRO differs: does not check show bit */
1237 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1239 i->private_vport_attrs[count] = device_attr_vport_##field; \
1240 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1245 /* The FC Transport Virtual Port Attributes: */
1247 /* Fixed Virtual Port Attributes */
1249 /* Dynamic Virtual Port Attributes */
1251 /* Private Virtual Port Attributes */
1253 fc_private_vport_rd_enum_attr(vport_state
, FC_VPORTSTATE_MAX_NAMELEN
);
1254 fc_private_vport_rd_enum_attr(vport_last_state
, FC_VPORTSTATE_MAX_NAMELEN
);
1255 fc_private_vport_rd_attr_cast(node_name
, "0x%llx\n", 20, unsigned long long);
1256 fc_private_vport_rd_attr_cast(port_name
, "0x%llx\n", 20, unsigned long long);
1259 show_fc_vport_roles (struct device
*dev
, struct device_attribute
*attr
,
1262 struct fc_vport
*vport
= transport_class_to_vport(dev
);
1264 if (vport
->roles
== FC_PORT_ROLE_UNKNOWN
)
1265 return snprintf(buf
, 20, "unknown\n");
1266 return get_fc_port_roles_names(vport
->roles
, buf
);
1268 static FC_DEVICE_ATTR(vport
, roles
, S_IRUGO
, show_fc_vport_roles
, NULL
);
1270 fc_private_vport_rd_enum_attr(vport_type
, FC_PORTTYPE_MAX_NAMELEN
);
1272 fc_private_vport_show_function(symbolic_name
, "%s\n",
1273 FC_VPORT_SYMBOLIC_NAMELEN
+ 1, )
1274 fc_vport_store_str_function(symbolic_name
, FC_VPORT_SYMBOLIC_NAMELEN
)
1275 static FC_DEVICE_ATTR(vport
, symbolic_name
, S_IRUGO
| S_IWUSR
,
1276 show_fc_vport_symbolic_name
, store_fc_vport_symbolic_name
);
1279 store_fc_vport_delete(struct device
*dev
, struct device_attribute
*attr
,
1280 const char *buf
, size_t count
)
1282 struct fc_vport
*vport
= transport_class_to_vport(dev
);
1283 struct Scsi_Host
*shost
= vport_to_shost(vport
);
1284 unsigned long flags
;
1286 spin_lock_irqsave(shost
->host_lock
, flags
);
1287 if (vport
->flags
& (FC_VPORT_DEL
| FC_VPORT_CREATING
)) {
1288 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1291 vport
->flags
|= FC_VPORT_DELETING
;
1292 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1294 fc_queue_work(shost
, &vport
->vport_delete_work
);
1297 static FC_DEVICE_ATTR(vport
, vport_delete
, S_IWUSR
,
1298 NULL
, store_fc_vport_delete
);
1302 * Enable/Disable vport
1303 * Write "1" to disable, write "0" to enable
1306 store_fc_vport_disable(struct device
*dev
, struct device_attribute
*attr
,
1310 struct fc_vport
*vport
= transport_class_to_vport(dev
);
1311 struct Scsi_Host
*shost
= vport_to_shost(vport
);
1312 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1315 if (vport
->flags
& (FC_VPORT_DEL
| FC_VPORT_CREATING
))
1319 if (vport
->vport_state
!= FC_VPORT_DISABLED
)
1321 } else if (*buf
== '1') {
1322 if (vport
->vport_state
== FC_VPORT_DISABLED
)
1327 stat
= i
->f
->vport_disable(vport
, ((*buf
== '0') ? false : true));
1328 return stat
? stat
: count
;
1330 static FC_DEVICE_ATTR(vport
, vport_disable
, S_IWUSR
,
1331 NULL
, store_fc_vport_disable
);
1335 * Host Attribute Management
1338 #define fc_host_show_function(field, format_string, sz, cast) \
1340 show_fc_host_##field (struct device *dev, \
1341 struct device_attribute *attr, char *buf) \
1343 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1344 struct fc_internal *i = to_fc_internal(shost->transportt); \
1345 if (i->f->get_host_##field) \
1346 i->f->get_host_##field(shost); \
1347 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1350 #define fc_host_store_function(field) \
1352 store_fc_host_##field(struct device *dev, \
1353 struct device_attribute *attr, \
1354 const char *buf, size_t count) \
1357 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1358 struct fc_internal *i = to_fc_internal(shost->transportt); \
1361 val = simple_strtoul(buf, &cp, 0); \
1362 if (*cp && (*cp != '\n')) \
1364 i->f->set_host_##field(shost, val); \
1368 #define fc_host_store_str_function(field, slen) \
1370 store_fc_host_##field(struct device *dev, \
1371 struct device_attribute *attr, \
1372 const char *buf, size_t count) \
1374 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1375 struct fc_internal *i = to_fc_internal(shost->transportt); \
1376 unsigned int cnt=count; \
1378 /* count may include a LF at end of string */ \
1379 if (buf[cnt-1] == '\n') \
1381 if (cnt > ((slen) - 1)) \
1383 memcpy(fc_host_##field(shost), buf, cnt); \
1384 i->f->set_host_##field(shost); \
1388 #define fc_host_rd_attr(field, format_string, sz) \
1389 fc_host_show_function(field, format_string, sz, ) \
1390 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1391 show_fc_host_##field, NULL)
1393 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1394 fc_host_show_function(field, format_string, sz, (cast)) \
1395 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1396 show_fc_host_##field, NULL)
1398 #define fc_host_rw_attr(field, format_string, sz) \
1399 fc_host_show_function(field, format_string, sz, ) \
1400 fc_host_store_function(field) \
1401 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1402 show_fc_host_##field, \
1403 store_fc_host_##field)
1405 #define fc_host_rd_enum_attr(title, maxlen) \
1407 show_fc_host_##title (struct device *dev, \
1408 struct device_attribute *attr, char *buf) \
1410 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1411 struct fc_internal *i = to_fc_internal(shost->transportt); \
1413 if (i->f->get_host_##title) \
1414 i->f->get_host_##title(shost); \
1415 name = get_fc_##title##_name(fc_host_##title(shost)); \
1418 return snprintf(buf, maxlen, "%s\n", name); \
1420 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1422 #define SETUP_HOST_ATTRIBUTE_RD(field) \
1423 i->private_host_attrs[count] = device_attr_host_##field; \
1424 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1425 i->private_host_attrs[count].store = NULL; \
1426 i->host_attrs[count] = &i->private_host_attrs[count]; \
1427 if (i->f->show_host_##field) \
1430 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
1431 i->private_host_attrs[count] = device_attr_host_##field; \
1432 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1433 i->private_host_attrs[count].store = NULL; \
1434 i->host_attrs[count] = &i->private_host_attrs[count]; \
1437 #define SETUP_HOST_ATTRIBUTE_RW(field) \
1438 i->private_host_attrs[count] = device_attr_host_##field; \
1439 if (!i->f->set_host_##field) { \
1440 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1441 i->private_host_attrs[count].store = NULL; \
1443 i->host_attrs[count] = &i->private_host_attrs[count]; \
1444 if (i->f->show_host_##field) \
1448 #define fc_private_host_show_function(field, format_string, sz, cast) \
1450 show_fc_host_##field (struct device *dev, \
1451 struct device_attribute *attr, char *buf) \
1453 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1454 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1457 #define fc_private_host_rd_attr(field, format_string, sz) \
1458 fc_private_host_show_function(field, format_string, sz, ) \
1459 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1460 show_fc_host_##field, NULL)
1462 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1463 fc_private_host_show_function(field, format_string, sz, (cast)) \
1464 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1465 show_fc_host_##field, NULL)
1467 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
1468 i->private_host_attrs[count] = device_attr_host_##field; \
1469 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1470 i->private_host_attrs[count].store = NULL; \
1471 i->host_attrs[count] = &i->private_host_attrs[count]; \
1474 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
1476 i->private_host_attrs[count] = device_attr_host_##field; \
1477 i->host_attrs[count] = &i->private_host_attrs[count]; \
1482 /* Fixed Host Attributes */
1485 show_fc_host_supported_classes (struct device
*dev
,
1486 struct device_attribute
*attr
, char *buf
)
1488 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1490 if (fc_host_supported_classes(shost
) == FC_COS_UNSPECIFIED
)
1491 return snprintf(buf
, 20, "unspecified\n");
1493 return get_fc_cos_names(fc_host_supported_classes(shost
), buf
);
1495 static FC_DEVICE_ATTR(host
, supported_classes
, S_IRUGO
,
1496 show_fc_host_supported_classes
, NULL
);
1499 show_fc_host_supported_fc4s (struct device
*dev
,
1500 struct device_attribute
*attr
, char *buf
)
1502 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1503 return (ssize_t
)show_fc_fc4s(buf
, fc_host_supported_fc4s(shost
));
1505 static FC_DEVICE_ATTR(host
, supported_fc4s
, S_IRUGO
,
1506 show_fc_host_supported_fc4s
, NULL
);
1509 show_fc_host_supported_speeds (struct device
*dev
,
1510 struct device_attribute
*attr
, char *buf
)
1512 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1514 if (fc_host_supported_speeds(shost
) == FC_PORTSPEED_UNKNOWN
)
1515 return snprintf(buf
, 20, "unknown\n");
1517 return get_fc_port_speed_names(fc_host_supported_speeds(shost
), buf
);
1519 static FC_DEVICE_ATTR(host
, supported_speeds
, S_IRUGO
,
1520 show_fc_host_supported_speeds
, NULL
);
1523 fc_private_host_rd_attr_cast(node_name
, "0x%llx\n", 20, unsigned long long);
1524 fc_private_host_rd_attr_cast(port_name
, "0x%llx\n", 20, unsigned long long);
1525 fc_private_host_rd_attr_cast(permanent_port_name
, "0x%llx\n", 20,
1526 unsigned long long);
1527 fc_private_host_rd_attr(maxframe_size
, "%u bytes\n", 20);
1528 fc_private_host_rd_attr(max_npiv_vports
, "%u\n", 20);
1529 fc_private_host_rd_attr(serial_number
, "%s\n", (FC_SERIAL_NUMBER_SIZE
+1));
1530 fc_private_host_rd_attr(manufacturer
, "%s\n", FC_SERIAL_NUMBER_SIZE
+ 1);
1531 fc_private_host_rd_attr(model
, "%s\n", FC_SYMBOLIC_NAME_SIZE
+ 1);
1532 fc_private_host_rd_attr(model_description
, "%s\n", FC_SYMBOLIC_NAME_SIZE
+ 1);
1533 fc_private_host_rd_attr(hardware_version
, "%s\n", FC_VERSION_STRING_SIZE
+ 1);
1534 fc_private_host_rd_attr(driver_version
, "%s\n", FC_VERSION_STRING_SIZE
+ 1);
1535 fc_private_host_rd_attr(firmware_version
, "%s\n", FC_VERSION_STRING_SIZE
+ 1);
1536 fc_private_host_rd_attr(optionrom_version
, "%s\n", FC_VERSION_STRING_SIZE
+ 1);
1539 /* Dynamic Host Attributes */
1542 show_fc_host_active_fc4s (struct device
*dev
,
1543 struct device_attribute
*attr
, char *buf
)
1545 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1546 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1548 if (i
->f
->get_host_active_fc4s
)
1549 i
->f
->get_host_active_fc4s(shost
);
1551 return (ssize_t
)show_fc_fc4s(buf
, fc_host_active_fc4s(shost
));
1553 static FC_DEVICE_ATTR(host
, active_fc4s
, S_IRUGO
,
1554 show_fc_host_active_fc4s
, NULL
);
1557 show_fc_host_speed (struct device
*dev
,
1558 struct device_attribute
*attr
, char *buf
)
1560 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1561 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1563 if (i
->f
->get_host_speed
)
1564 i
->f
->get_host_speed(shost
);
1566 if (fc_host_speed(shost
) == FC_PORTSPEED_UNKNOWN
)
1567 return snprintf(buf
, 20, "unknown\n");
1569 return get_fc_port_speed_names(fc_host_speed(shost
), buf
);
1571 static FC_DEVICE_ATTR(host
, speed
, S_IRUGO
,
1572 show_fc_host_speed
, NULL
);
1575 fc_host_rd_attr(port_id
, "0x%06x\n", 20);
1576 fc_host_rd_enum_attr(port_type
, FC_PORTTYPE_MAX_NAMELEN
);
1577 fc_host_rd_enum_attr(port_state
, FC_PORTSTATE_MAX_NAMELEN
);
1578 fc_host_rd_attr_cast(fabric_name
, "0x%llx\n", 20, unsigned long long);
1579 fc_host_rd_attr(symbolic_name
, "%s\n", FC_SYMBOLIC_NAME_SIZE
+ 1);
1581 fc_private_host_show_function(system_hostname
, "%s\n",
1582 FC_SYMBOLIC_NAME_SIZE
+ 1, )
1583 fc_host_store_str_function(system_hostname
, FC_SYMBOLIC_NAME_SIZE
)
1584 static FC_DEVICE_ATTR(host
, system_hostname
, S_IRUGO
| S_IWUSR
,
1585 show_fc_host_system_hostname
, store_fc_host_system_hostname
);
1588 /* Private Host Attributes */
1591 show_fc_private_host_tgtid_bind_type(struct device
*dev
,
1592 struct device_attribute
*attr
, char *buf
)
1594 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1597 name
= get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost
));
1600 return snprintf(buf
, FC_BINDTYPE_MAX_NAMELEN
, "%s\n", name
);
1603 #define get_list_head_entry(pos, head, member) \
1604 pos = list_entry((head)->next, typeof(*pos), member)
1607 store_fc_private_host_tgtid_bind_type(struct device
*dev
,
1608 struct device_attribute
*attr
, const char *buf
, size_t count
)
1610 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1611 struct fc_rport
*rport
;
1612 enum fc_tgtid_binding_type val
;
1613 unsigned long flags
;
1615 if (get_fc_tgtid_bind_type_match(buf
, &val
))
1618 /* if changing bind type, purge all unused consistent bindings */
1619 if (val
!= fc_host_tgtid_bind_type(shost
)) {
1620 spin_lock_irqsave(shost
->host_lock
, flags
);
1621 while (!list_empty(&fc_host_rport_bindings(shost
))) {
1622 get_list_head_entry(rport
,
1623 &fc_host_rport_bindings(shost
), peers
);
1624 list_del(&rport
->peers
);
1625 rport
->port_state
= FC_PORTSTATE_DELETED
;
1626 fc_queue_work(shost
, &rport
->rport_delete_work
);
1628 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1631 fc_host_tgtid_bind_type(shost
) = val
;
1635 static FC_DEVICE_ATTR(host
, tgtid_bind_type
, S_IRUGO
| S_IWUSR
,
1636 show_fc_private_host_tgtid_bind_type
,
1637 store_fc_private_host_tgtid_bind_type
);
1640 store_fc_private_host_issue_lip(struct device
*dev
,
1641 struct device_attribute
*attr
, const char *buf
, size_t count
)
1643 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1644 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1647 /* ignore any data value written to the attribute */
1648 if (i
->f
->issue_fc_host_lip
) {
1649 ret
= i
->f
->issue_fc_host_lip(shost
);
1650 return ret
? ret
: count
;
1656 static FC_DEVICE_ATTR(host
, issue_lip
, S_IWUSR
, NULL
,
1657 store_fc_private_host_issue_lip
);
1660 store_fc_private_host_dev_loss_tmo(struct device
*dev
,
1661 struct device_attribute
*attr
,
1662 const char *buf
, size_t count
)
1664 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1665 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
1666 struct fc_rport
*rport
;
1667 unsigned long val
, flags
;
1670 rc
= fc_str_to_dev_loss(buf
, &val
);
1674 fc_host_dev_loss_tmo(shost
) = val
;
1675 spin_lock_irqsave(shost
->host_lock
, flags
);
1676 list_for_each_entry(rport
, &fc_host
->rports
, peers
)
1677 fc_rport_set_dev_loss_tmo(rport
, val
);
1678 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1682 fc_private_host_show_function(dev_loss_tmo
, "%d\n", 20, );
1683 static FC_DEVICE_ATTR(host
, dev_loss_tmo
, S_IRUGO
| S_IWUSR
,
1684 show_fc_host_dev_loss_tmo
,
1685 store_fc_private_host_dev_loss_tmo
);
1687 fc_private_host_rd_attr(npiv_vports_inuse
, "%u\n", 20);
1690 * Host Statistics Management
1693 /* Show a given an attribute in the statistics group */
1695 fc_stat_show(const struct device
*dev
, char *buf
, unsigned long offset
)
1697 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1698 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1699 struct fc_host_statistics
*stats
;
1700 ssize_t ret
= -ENOENT
;
1702 if (offset
> sizeof(struct fc_host_statistics
) ||
1703 offset
% sizeof(u64
) != 0)
1706 if (i
->f
->get_fc_host_stats
) {
1707 stats
= (i
->f
->get_fc_host_stats
)(shost
);
1709 ret
= snprintf(buf
, 20, "0x%llx\n",
1710 (unsigned long long)*(u64
*)(((u8
*) stats
) + offset
));
1716 /* generate a read-only statistics attribute */
1717 #define fc_host_statistic(name) \
1718 static ssize_t show_fcstat_##name(struct device *cd, \
1719 struct device_attribute *attr, \
1722 return fc_stat_show(cd, buf, \
1723 offsetof(struct fc_host_statistics, name)); \
1725 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1727 fc_host_statistic(seconds_since_last_reset
);
1728 fc_host_statistic(tx_frames
);
1729 fc_host_statistic(tx_words
);
1730 fc_host_statistic(rx_frames
);
1731 fc_host_statistic(rx_words
);
1732 fc_host_statistic(lip_count
);
1733 fc_host_statistic(nos_count
);
1734 fc_host_statistic(error_frames
);
1735 fc_host_statistic(dumped_frames
);
1736 fc_host_statistic(link_failure_count
);
1737 fc_host_statistic(loss_of_sync_count
);
1738 fc_host_statistic(loss_of_signal_count
);
1739 fc_host_statistic(prim_seq_protocol_err_count
);
1740 fc_host_statistic(invalid_tx_word_count
);
1741 fc_host_statistic(invalid_crc_count
);
1742 fc_host_statistic(fcp_input_requests
);
1743 fc_host_statistic(fcp_output_requests
);
1744 fc_host_statistic(fcp_control_requests
);
1745 fc_host_statistic(fcp_input_megabytes
);
1746 fc_host_statistic(fcp_output_megabytes
);
1749 fc_reset_statistics(struct device
*dev
, struct device_attribute
*attr
,
1750 const char *buf
, size_t count
)
1752 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1753 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1755 /* ignore any data value written to the attribute */
1756 if (i
->f
->reset_fc_host_stats
) {
1757 i
->f
->reset_fc_host_stats(shost
);
1763 static FC_DEVICE_ATTR(host
, reset_statistics
, S_IWUSR
, NULL
,
1764 fc_reset_statistics
);
1766 static struct attribute
*fc_statistics_attrs
[] = {
1767 &device_attr_host_seconds_since_last_reset
.attr
,
1768 &device_attr_host_tx_frames
.attr
,
1769 &device_attr_host_tx_words
.attr
,
1770 &device_attr_host_rx_frames
.attr
,
1771 &device_attr_host_rx_words
.attr
,
1772 &device_attr_host_lip_count
.attr
,
1773 &device_attr_host_nos_count
.attr
,
1774 &device_attr_host_error_frames
.attr
,
1775 &device_attr_host_dumped_frames
.attr
,
1776 &device_attr_host_link_failure_count
.attr
,
1777 &device_attr_host_loss_of_sync_count
.attr
,
1778 &device_attr_host_loss_of_signal_count
.attr
,
1779 &device_attr_host_prim_seq_protocol_err_count
.attr
,
1780 &device_attr_host_invalid_tx_word_count
.attr
,
1781 &device_attr_host_invalid_crc_count
.attr
,
1782 &device_attr_host_fcp_input_requests
.attr
,
1783 &device_attr_host_fcp_output_requests
.attr
,
1784 &device_attr_host_fcp_control_requests
.attr
,
1785 &device_attr_host_fcp_input_megabytes
.attr
,
1786 &device_attr_host_fcp_output_megabytes
.attr
,
1787 &device_attr_host_reset_statistics
.attr
,
1791 static struct attribute_group fc_statistics_group
= {
1792 .name
= "statistics",
1793 .attrs
= fc_statistics_attrs
,
1797 /* Host Vport Attributes */
1800 fc_parse_wwn(const char *ns
, u64
*nm
)
1805 memset(wwn
, 0, sizeof(wwn
));
1807 /* Validate and store the new name */
1808 for (i
=0, j
=0; i
< 16; i
++) {
1811 value
= hex_to_bin(*ns
++);
1813 j
= (j
<< 4) | value
;
1817 wwn
[i
/2] = j
& 0xff;
1822 *nm
= wwn_to_u64(wwn
);
1829 * "Short-cut" sysfs variable to create a new vport on a FC Host.
1830 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1831 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1832 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1835 store_fc_host_vport_create(struct device
*dev
, struct device_attribute
*attr
,
1836 const char *buf
, size_t count
)
1838 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1839 struct fc_vport_identifiers vid
;
1840 struct fc_vport
*vport
;
1841 unsigned int cnt
=count
;
1844 memset(&vid
, 0, sizeof(vid
));
1846 /* count may include a LF at end of string */
1847 if (buf
[cnt
-1] == '\n')
1850 /* validate we have enough characters for WWPN */
1851 if ((cnt
!= (16+1+16)) || (buf
[16] != ':'))
1854 stat
= fc_parse_wwn(&buf
[0], &vid
.port_name
);
1858 stat
= fc_parse_wwn(&buf
[17], &vid
.node_name
);
1862 vid
.roles
= FC_PORT_ROLE_FCP_INITIATOR
;
1863 vid
.vport_type
= FC_PORTTYPE_NPIV
;
1864 /* vid.symbolic_name is already zero/NULL's */
1865 vid
.disable
= false; /* always enabled */
1867 /* we only allow support on Channel 0 !!! */
1868 stat
= fc_vport_setup(shost
, 0, &shost
->shost_gendev
, &vid
, &vport
);
1869 return stat
? stat
: count
;
1871 static FC_DEVICE_ATTR(host
, vport_create
, S_IWUSR
, NULL
,
1872 store_fc_host_vport_create
);
1876 * "Short-cut" sysfs variable to delete a vport on a FC Host.
1877 * Vport is identified by a string containing "<WWPN>:<WWNN>".
1878 * The WWNs are specified as hex characters, and may *not* contain
1879 * any prefixes (e.g. 0x, x, etc)
1882 store_fc_host_vport_delete(struct device
*dev
, struct device_attribute
*attr
,
1883 const char *buf
, size_t count
)
1885 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1886 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
1887 struct fc_vport
*vport
;
1889 unsigned long flags
;
1890 unsigned int cnt
=count
;
1893 /* count may include a LF at end of string */
1894 if (buf
[cnt
-1] == '\n')
1897 /* validate we have enough characters for WWPN */
1898 if ((cnt
!= (16+1+16)) || (buf
[16] != ':'))
1901 stat
= fc_parse_wwn(&buf
[0], &wwpn
);
1905 stat
= fc_parse_wwn(&buf
[17], &wwnn
);
1909 spin_lock_irqsave(shost
->host_lock
, flags
);
1911 /* we only allow support on Channel 0 !!! */
1912 list_for_each_entry(vport
, &fc_host
->vports
, peers
) {
1913 if ((vport
->channel
== 0) &&
1914 (vport
->port_name
== wwpn
) && (vport
->node_name
== wwnn
)) {
1915 if (vport
->flags
& (FC_VPORT_DEL
| FC_VPORT_CREATING
))
1917 vport
->flags
|= FC_VPORT_DELETING
;
1922 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1927 stat
= fc_vport_terminate(vport
);
1928 return stat
? stat
: count
;
1930 static FC_DEVICE_ATTR(host
, vport_delete
, S_IWUSR
, NULL
,
1931 store_fc_host_vport_delete
);
1934 static int fc_host_match(struct attribute_container
*cont
,
1937 struct Scsi_Host
*shost
;
1938 struct fc_internal
*i
;
1940 if (!scsi_is_host_device(dev
))
1943 shost
= dev_to_shost(dev
);
1944 if (!shost
->transportt
|| shost
->transportt
->host_attrs
.ac
.class
1945 != &fc_host_class
.class)
1948 i
= to_fc_internal(shost
->transportt
);
1950 return &i
->t
.host_attrs
.ac
== cont
;
1953 static int fc_target_match(struct attribute_container
*cont
,
1956 struct Scsi_Host
*shost
;
1957 struct fc_internal
*i
;
1959 if (!scsi_is_target_device(dev
))
1962 shost
= dev_to_shost(dev
->parent
);
1963 if (!shost
->transportt
|| shost
->transportt
->host_attrs
.ac
.class
1964 != &fc_host_class
.class)
1967 i
= to_fc_internal(shost
->transportt
);
1969 return &i
->t
.target_attrs
.ac
== cont
;
1972 static void fc_rport_dev_release(struct device
*dev
)
1974 struct fc_rport
*rport
= dev_to_rport(dev
);
1975 put_device(dev
->parent
);
1979 int scsi_is_fc_rport(const struct device
*dev
)
1981 return dev
->release
== fc_rport_dev_release
;
1983 EXPORT_SYMBOL(scsi_is_fc_rport
);
1985 static int fc_rport_match(struct attribute_container
*cont
,
1988 struct Scsi_Host
*shost
;
1989 struct fc_internal
*i
;
1991 if (!scsi_is_fc_rport(dev
))
1994 shost
= dev_to_shost(dev
->parent
);
1995 if (!shost
->transportt
|| shost
->transportt
->host_attrs
.ac
.class
1996 != &fc_host_class
.class)
1999 i
= to_fc_internal(shost
->transportt
);
2001 return &i
->rport_attr_cont
.ac
== cont
;
2005 static void fc_vport_dev_release(struct device
*dev
)
2007 struct fc_vport
*vport
= dev_to_vport(dev
);
2008 put_device(dev
->parent
); /* release kobj parent */
2012 int scsi_is_fc_vport(const struct device
*dev
)
2014 return dev
->release
== fc_vport_dev_release
;
2016 EXPORT_SYMBOL(scsi_is_fc_vport
);
2018 static int fc_vport_match(struct attribute_container
*cont
,
2021 struct fc_vport
*vport
;
2022 struct Scsi_Host
*shost
;
2023 struct fc_internal
*i
;
2025 if (!scsi_is_fc_vport(dev
))
2027 vport
= dev_to_vport(dev
);
2029 shost
= vport_to_shost(vport
);
2030 if (!shost
->transportt
|| shost
->transportt
->host_attrs
.ac
.class
2031 != &fc_host_class
.class)
2034 i
= to_fc_internal(shost
->transportt
);
2035 return &i
->vport_attr_cont
.ac
== cont
;
2040 * fc_timed_out - FC Transport I/O timeout intercept handler
2041 * @scmd: The SCSI command which timed out
2043 * This routine protects against error handlers getting invoked while a
2044 * rport is in a blocked state, typically due to a temporarily loss of
2045 * connectivity. If the error handlers are allowed to proceed, requests
2046 * to abort i/o, reset the target, etc will likely fail as there is no way
2047 * to communicate with the device to perform the requested function. These
2048 * failures may result in the midlayer taking the device offline, requiring
2049 * manual intervention to restore operation.
2051 * This routine, called whenever an i/o times out, validates the state of
2052 * the underlying rport. If the rport is blocked, it returns
2053 * EH_RESET_TIMER, which will continue to reschedule the timeout.
2054 * Eventually, either the device will return, or devloss_tmo will fire,
2055 * and when the timeout then fires, it will be handled normally.
2056 * If the rport is not blocked, normal error handling continues.
2059 * This routine assumes no locks are held on entry.
2061 static enum blk_eh_timer_return
2062 fc_timed_out(struct scsi_cmnd
*scmd
)
2064 struct fc_rport
*rport
= starget_to_rport(scsi_target(scmd
->device
));
2066 if (rport
->port_state
== FC_PORTSTATE_BLOCKED
)
2067 return BLK_EH_RESET_TIMER
;
2069 return BLK_EH_NOT_HANDLED
;
2073 * Called by fc_user_scan to locate an rport on the shost that
2074 * matches the channel and target id, and invoke scsi_scan_target()
2078 fc_user_scan_tgt(struct Scsi_Host
*shost
, uint channel
, uint id
, uint lun
)
2080 struct fc_rport
*rport
;
2081 unsigned long flags
;
2083 spin_lock_irqsave(shost
->host_lock
, flags
);
2085 list_for_each_entry(rport
, &fc_host_rports(shost
), peers
) {
2086 if (rport
->scsi_target_id
== -1)
2089 if (rport
->port_state
!= FC_PORTSTATE_ONLINE
)
2092 if ((channel
== rport
->channel
) &&
2093 (id
== rport
->scsi_target_id
)) {
2094 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2095 scsi_scan_target(&rport
->dev
, channel
, id
, lun
, 1);
2100 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2104 * Called via sysfs scan routines. Necessary, as the FC transport
2105 * wants to place all target objects below the rport object. So this
2106 * routine must invoke the scsi_scan_target() routine with the rport
2107 * object as the parent.
2110 fc_user_scan(struct Scsi_Host
*shost
, uint channel
, uint id
, uint lun
)
2115 if (((channel
!= SCAN_WILD_CARD
) && (channel
> shost
->max_channel
)) ||
2116 ((id
!= SCAN_WILD_CARD
) && (id
>= shost
->max_id
)) ||
2117 ((lun
!= SCAN_WILD_CARD
) && (lun
> shost
->max_lun
)))
2120 if (channel
== SCAN_WILD_CARD
) {
2122 chhi
= shost
->max_channel
+ 1;
2128 if (id
== SCAN_WILD_CARD
) {
2130 tgthi
= shost
->max_id
;
2136 for ( ; chlo
< chhi
; chlo
++)
2137 for ( ; tgtlo
< tgthi
; tgtlo
++)
2138 fc_user_scan_tgt(shost
, chlo
, tgtlo
, lun
);
2143 static int fc_tsk_mgmt_response(struct Scsi_Host
*shost
, u64 nexus
, u64 tm_id
,
2146 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
2147 return i
->f
->tsk_mgmt_response(shost
, nexus
, tm_id
, result
);
2150 static int fc_it_nexus_response(struct Scsi_Host
*shost
, u64 nexus
, int result
)
2152 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
2153 return i
->f
->it_nexus_response(shost
, nexus
, result
);
2156 struct scsi_transport_template
*
2157 fc_attach_transport(struct fc_function_template
*ft
)
2160 struct fc_internal
*i
= kzalloc(sizeof(struct fc_internal
),
2166 i
->t
.target_attrs
.ac
.attrs
= &i
->starget_attrs
[0];
2167 i
->t
.target_attrs
.ac
.class = &fc_transport_class
.class;
2168 i
->t
.target_attrs
.ac
.match
= fc_target_match
;
2169 i
->t
.target_size
= sizeof(struct fc_starget_attrs
);
2170 transport_container_register(&i
->t
.target_attrs
);
2172 i
->t
.host_attrs
.ac
.attrs
= &i
->host_attrs
[0];
2173 i
->t
.host_attrs
.ac
.class = &fc_host_class
.class;
2174 i
->t
.host_attrs
.ac
.match
= fc_host_match
;
2175 i
->t
.host_size
= sizeof(struct fc_host_attrs
);
2176 if (ft
->get_fc_host_stats
)
2177 i
->t
.host_attrs
.statistics
= &fc_statistics_group
;
2178 transport_container_register(&i
->t
.host_attrs
);
2180 i
->rport_attr_cont
.ac
.attrs
= &i
->rport_attrs
[0];
2181 i
->rport_attr_cont
.ac
.class = &fc_rport_class
.class;
2182 i
->rport_attr_cont
.ac
.match
= fc_rport_match
;
2183 transport_container_register(&i
->rport_attr_cont
);
2185 i
->vport_attr_cont
.ac
.attrs
= &i
->vport_attrs
[0];
2186 i
->vport_attr_cont
.ac
.class = &fc_vport_class
.class;
2187 i
->vport_attr_cont
.ac
.match
= fc_vport_match
;
2188 transport_container_register(&i
->vport_attr_cont
);
2192 /* Transport uses the shost workq for scsi scanning */
2193 i
->t
.create_work_queue
= 1;
2195 i
->t
.eh_timed_out
= fc_timed_out
;
2197 i
->t
.user_scan
= fc_user_scan
;
2199 /* target-mode drivers' functions */
2200 i
->t
.tsk_mgmt_response
= fc_tsk_mgmt_response
;
2201 i
->t
.it_nexus_response
= fc_it_nexus_response
;
2204 * Setup SCSI Target Attributes.
2207 SETUP_STARGET_ATTRIBUTE_RD(node_name
);
2208 SETUP_STARGET_ATTRIBUTE_RD(port_name
);
2209 SETUP_STARGET_ATTRIBUTE_RD(port_id
);
2211 BUG_ON(count
> FC_STARGET_NUM_ATTRS
);
2213 i
->starget_attrs
[count
] = NULL
;
2217 * Setup SCSI Host Attributes.
2220 SETUP_HOST_ATTRIBUTE_RD(node_name
);
2221 SETUP_HOST_ATTRIBUTE_RD(port_name
);
2222 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name
);
2223 SETUP_HOST_ATTRIBUTE_RD(supported_classes
);
2224 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s
);
2225 SETUP_HOST_ATTRIBUTE_RD(supported_speeds
);
2226 SETUP_HOST_ATTRIBUTE_RD(maxframe_size
);
2227 if (ft
->vport_create
) {
2228 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports
);
2229 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse
);
2231 SETUP_HOST_ATTRIBUTE_RD(serial_number
);
2232 SETUP_HOST_ATTRIBUTE_RD(manufacturer
);
2233 SETUP_HOST_ATTRIBUTE_RD(model
);
2234 SETUP_HOST_ATTRIBUTE_RD(model_description
);
2235 SETUP_HOST_ATTRIBUTE_RD(hardware_version
);
2236 SETUP_HOST_ATTRIBUTE_RD(driver_version
);
2237 SETUP_HOST_ATTRIBUTE_RD(firmware_version
);
2238 SETUP_HOST_ATTRIBUTE_RD(optionrom_version
);
2240 SETUP_HOST_ATTRIBUTE_RD(port_id
);
2241 SETUP_HOST_ATTRIBUTE_RD(port_type
);
2242 SETUP_HOST_ATTRIBUTE_RD(port_state
);
2243 SETUP_HOST_ATTRIBUTE_RD(active_fc4s
);
2244 SETUP_HOST_ATTRIBUTE_RD(speed
);
2245 SETUP_HOST_ATTRIBUTE_RD(fabric_name
);
2246 SETUP_HOST_ATTRIBUTE_RD(symbolic_name
);
2247 SETUP_HOST_ATTRIBUTE_RW(system_hostname
);
2249 /* Transport-managed attributes */
2250 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo
);
2251 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type
);
2252 if (ft
->issue_fc_host_lip
)
2253 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip
);
2254 if (ft
->vport_create
)
2255 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create
);
2256 if (ft
->vport_delete
)
2257 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete
);
2259 BUG_ON(count
> FC_HOST_NUM_ATTRS
);
2261 i
->host_attrs
[count
] = NULL
;
2264 * Setup Remote Port Attributes.
2267 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size
);
2268 SETUP_RPORT_ATTRIBUTE_RD(supported_classes
);
2269 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo
);
2270 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name
);
2271 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name
);
2272 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id
);
2273 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles
);
2274 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state
);
2275 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id
);
2276 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo
);
2278 BUG_ON(count
> FC_RPORT_NUM_ATTRS
);
2280 i
->rport_attrs
[count
] = NULL
;
2283 * Setup Virtual Port Attributes.
2286 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state
);
2287 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state
);
2288 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name
);
2289 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name
);
2290 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles
);
2291 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type
);
2292 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name
);
2293 SETUP_VPORT_ATTRIBUTE_WR(vport_delete
);
2294 SETUP_VPORT_ATTRIBUTE_WR(vport_disable
);
2296 BUG_ON(count
> FC_VPORT_NUM_ATTRS
);
2298 i
->vport_attrs
[count
] = NULL
;
2302 EXPORT_SYMBOL(fc_attach_transport
);
2304 void fc_release_transport(struct scsi_transport_template
*t
)
2306 struct fc_internal
*i
= to_fc_internal(t
);
2308 transport_container_unregister(&i
->t
.target_attrs
);
2309 transport_container_unregister(&i
->t
.host_attrs
);
2310 transport_container_unregister(&i
->rport_attr_cont
);
2311 transport_container_unregister(&i
->vport_attr_cont
);
2315 EXPORT_SYMBOL(fc_release_transport
);
2318 * fc_queue_work - Queue work to the fc_host workqueue.
2319 * @shost: Pointer to Scsi_Host bound to fc_host.
2320 * @work: Work to queue for execution.
2323 * 1 - work queued for execution
2324 * 0 - work is already queued
2325 * -EINVAL - work queue doesn't exist
2328 fc_queue_work(struct Scsi_Host
*shost
, struct work_struct
*work
)
2330 if (unlikely(!fc_host_work_q(shost
))) {
2332 "ERROR: FC host '%s' attempted to queue work, "
2333 "when no workqueue created.\n", shost
->hostt
->name
);
2339 return queue_work(fc_host_work_q(shost
), work
);
2343 * fc_flush_work - Flush a fc_host's workqueue.
2344 * @shost: Pointer to Scsi_Host bound to fc_host.
2347 fc_flush_work(struct Scsi_Host
*shost
)
2349 if (!fc_host_work_q(shost
)) {
2351 "ERROR: FC host '%s' attempted to flush work, "
2352 "when no workqueue created.\n", shost
->hostt
->name
);
2357 flush_workqueue(fc_host_work_q(shost
));
2361 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2362 * @shost: Pointer to Scsi_Host bound to fc_host.
2363 * @work: Work to queue for execution.
2364 * @delay: jiffies to delay the work queuing
2367 * 1 on success / 0 already queued / < 0 for error
2370 fc_queue_devloss_work(struct Scsi_Host
*shost
, struct delayed_work
*work
,
2371 unsigned long delay
)
2373 if (unlikely(!fc_host_devloss_work_q(shost
))) {
2375 "ERROR: FC host '%s' attempted to queue work, "
2376 "when no workqueue created.\n", shost
->hostt
->name
);
2382 return queue_delayed_work(fc_host_devloss_work_q(shost
), work
, delay
);
2386 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2387 * @shost: Pointer to Scsi_Host bound to fc_host.
2390 fc_flush_devloss(struct Scsi_Host
*shost
)
2392 if (!fc_host_devloss_work_q(shost
)) {
2394 "ERROR: FC host '%s' attempted to flush work, "
2395 "when no workqueue created.\n", shost
->hostt
->name
);
2400 flush_workqueue(fc_host_devloss_work_q(shost
));
2405 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2406 * @shost: Which &Scsi_Host
2408 * This routine is expected to be called immediately preceding the
2409 * a driver's call to scsi_remove_host().
2411 * WARNING: A driver utilizing the fc_transport, which fails to call
2412 * this routine prior to scsi_remove_host(), will leave dangling
2413 * objects in /sys/class/fc_remote_ports. Access to any of these
2414 * objects can result in a system crash !!!
2417 * This routine assumes no locks are held on entry.
2420 fc_remove_host(struct Scsi_Host
*shost
)
2422 struct fc_vport
*vport
= NULL
, *next_vport
= NULL
;
2423 struct fc_rport
*rport
= NULL
, *next_rport
= NULL
;
2424 struct workqueue_struct
*work_q
;
2425 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
2426 unsigned long flags
;
2428 spin_lock_irqsave(shost
->host_lock
, flags
);
2430 /* Remove any vports */
2431 list_for_each_entry_safe(vport
, next_vport
, &fc_host
->vports
, peers
)
2432 fc_queue_work(shost
, &vport
->vport_delete_work
);
2434 /* Remove any remote ports */
2435 list_for_each_entry_safe(rport
, next_rport
,
2436 &fc_host
->rports
, peers
) {
2437 list_del(&rport
->peers
);
2438 rport
->port_state
= FC_PORTSTATE_DELETED
;
2439 fc_queue_work(shost
, &rport
->rport_delete_work
);
2442 list_for_each_entry_safe(rport
, next_rport
,
2443 &fc_host
->rport_bindings
, peers
) {
2444 list_del(&rport
->peers
);
2445 rport
->port_state
= FC_PORTSTATE_DELETED
;
2446 fc_queue_work(shost
, &rport
->rport_delete_work
);
2449 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2451 /* flush all scan work items */
2452 scsi_flush_work(shost
);
2454 /* flush all stgt delete, and rport delete work items, then kill it */
2455 if (fc_host
->work_q
) {
2456 work_q
= fc_host
->work_q
;
2457 fc_host
->work_q
= NULL
;
2458 destroy_workqueue(work_q
);
2461 /* flush all devloss work items, then kill it */
2462 if (fc_host
->devloss_work_q
) {
2463 work_q
= fc_host
->devloss_work_q
;
2464 fc_host
->devloss_work_q
= NULL
;
2465 destroy_workqueue(work_q
);
2468 EXPORT_SYMBOL(fc_remove_host
);
2470 static void fc_terminate_rport_io(struct fc_rport
*rport
)
2472 struct Scsi_Host
*shost
= rport_to_shost(rport
);
2473 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
2475 /* Involve the LLDD if possible to terminate all io on the rport. */
2476 if (i
->f
->terminate_rport_io
)
2477 i
->f
->terminate_rport_io(rport
);
2480 * must unblock to flush queued IO. The caller will have set
2481 * the port_state or flags, so that fc_remote_port_chkready will
2484 scsi_target_unblock(&rport
->dev
);
2488 * fc_starget_delete - called to delete the scsi descendants of an rport
2489 * @work: remote port to be operated on.
2491 * Deletes target and all sdevs.
2494 fc_starget_delete(struct work_struct
*work
)
2496 struct fc_rport
*rport
=
2497 container_of(work
, struct fc_rport
, stgt_delete_work
);
2499 fc_terminate_rport_io(rport
);
2500 scsi_remove_target(&rport
->dev
);
2505 * fc_rport_final_delete - finish rport termination and delete it.
2506 * @work: remote port to be deleted.
2509 fc_rport_final_delete(struct work_struct
*work
)
2511 struct fc_rport
*rport
=
2512 container_of(work
, struct fc_rport
, rport_delete_work
);
2513 struct device
*dev
= &rport
->dev
;
2514 struct Scsi_Host
*shost
= rport_to_shost(rport
);
2515 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
2516 unsigned long flags
;
2517 int do_callback
= 0;
2519 fc_terminate_rport_io(rport
);
2522 * if a scan is pending, flush the SCSI Host work_q so that
2523 * that we can reclaim the rport scan work element.
2525 if (rport
->flags
& FC_RPORT_SCAN_PENDING
)
2526 scsi_flush_work(shost
);
2529 * Cancel any outstanding timers. These should really exist
2530 * only when rmmod'ing the LLDD and we're asking for
2531 * immediate termination of the rports
2533 spin_lock_irqsave(shost
->host_lock
, flags
);
2534 if (rport
->flags
& FC_RPORT_DEVLOSS_PENDING
) {
2535 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2536 if (!cancel_delayed_work(&rport
->fail_io_work
))
2537 fc_flush_devloss(shost
);
2538 if (!cancel_delayed_work(&rport
->dev_loss_work
))
2539 fc_flush_devloss(shost
);
2540 spin_lock_irqsave(shost
->host_lock
, flags
);
2541 rport
->flags
&= ~FC_RPORT_DEVLOSS_PENDING
;
2543 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2545 /* Delete SCSI target and sdevs */
2546 if (rport
->scsi_target_id
!= -1)
2547 fc_starget_delete(&rport
->stgt_delete_work
);
2550 * Notify the driver that the rport is now dead. The LLDD will
2551 * also guarantee that any communication to the rport is terminated
2553 * Avoid this call if we already called it when we preserved the
2554 * rport for the binding.
2556 spin_lock_irqsave(shost
->host_lock
, flags
);
2557 if (!(rport
->flags
& FC_RPORT_DEVLOSS_CALLBK_DONE
) &&
2558 (i
->f
->dev_loss_tmo_callbk
)) {
2559 rport
->flags
|= FC_RPORT_DEVLOSS_CALLBK_DONE
;
2562 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2565 i
->f
->dev_loss_tmo_callbk(rport
);
2567 fc_bsg_remove(rport
->rqst_q
);
2569 transport_remove_device(dev
);
2571 transport_destroy_device(dev
);
2572 put_device(&shost
->shost_gendev
); /* for fc_host->rport list */
2573 put_device(dev
); /* for self-reference */
2578 * fc_rport_create - allocates and creates a remote FC port.
2579 * @shost: scsi host the remote port is connected to.
2580 * @channel: Channel on shost port connected to.
2581 * @ids: The world wide names, fc address, and FC4 port
2582 * roles for the remote port.
2584 * Allocates and creates the remoter port structure, including the
2585 * class and sysfs creation.
2588 * This routine assumes no locks are held on entry.
2590 static struct fc_rport
*
2591 fc_rport_create(struct Scsi_Host
*shost
, int channel
,
2592 struct fc_rport_identifiers
*ids
)
2594 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
2595 struct fc_internal
*fci
= to_fc_internal(shost
->transportt
);
2596 struct fc_rport
*rport
;
2598 unsigned long flags
;
2602 size
= (sizeof(struct fc_rport
) + fci
->f
->dd_fcrport_size
);
2603 rport
= kzalloc(size
, GFP_KERNEL
);
2604 if (unlikely(!rport
)) {
2605 printk(KERN_ERR
"%s: allocation failure\n", __func__
);
2609 rport
->maxframe_size
= -1;
2610 rport
->supported_classes
= FC_COS_UNSPECIFIED
;
2611 rport
->dev_loss_tmo
= fc_host
->dev_loss_tmo
;
2612 memcpy(&rport
->node_name
, &ids
->node_name
, sizeof(rport
->node_name
));
2613 memcpy(&rport
->port_name
, &ids
->port_name
, sizeof(rport
->port_name
));
2614 rport
->port_id
= ids
->port_id
;
2615 rport
->roles
= ids
->roles
;
2616 rport
->port_state
= FC_PORTSTATE_ONLINE
;
2617 if (fci
->f
->dd_fcrport_size
)
2618 rport
->dd_data
= &rport
[1];
2619 rport
->channel
= channel
;
2620 rport
->fast_io_fail_tmo
= -1;
2622 INIT_DELAYED_WORK(&rport
->dev_loss_work
, fc_timeout_deleted_rport
);
2623 INIT_DELAYED_WORK(&rport
->fail_io_work
, fc_timeout_fail_rport_io
);
2624 INIT_WORK(&rport
->scan_work
, fc_scsi_scan_rport
);
2625 INIT_WORK(&rport
->stgt_delete_work
, fc_starget_delete
);
2626 INIT_WORK(&rport
->rport_delete_work
, fc_rport_final_delete
);
2628 spin_lock_irqsave(shost
->host_lock
, flags
);
2630 rport
->number
= fc_host
->next_rport_number
++;
2631 if (rport
->roles
& FC_PORT_ROLE_FCP_TARGET
)
2632 rport
->scsi_target_id
= fc_host
->next_target_id
++;
2634 rport
->scsi_target_id
= -1;
2635 list_add_tail(&rport
->peers
, &fc_host
->rports
);
2636 get_device(&shost
->shost_gendev
); /* for fc_host->rport list */
2638 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2641 device_initialize(dev
); /* takes self reference */
2642 dev
->parent
= get_device(&shost
->shost_gendev
); /* parent reference */
2643 dev
->release
= fc_rport_dev_release
;
2644 dev_set_name(dev
, "rport-%d:%d-%d",
2645 shost
->host_no
, channel
, rport
->number
);
2646 transport_setup_device(dev
);
2648 error
= device_add(dev
);
2650 printk(KERN_ERR
"FC Remote Port device_add failed\n");
2653 transport_add_device(dev
);
2654 transport_configure_device(dev
);
2656 fc_bsg_rportadd(shost
, rport
);
2657 /* ignore any bsg add error - we just can't do sgio */
2659 if (rport
->roles
& FC_PORT_ROLE_FCP_TARGET
) {
2660 /* initiate a scan of the target */
2661 rport
->flags
|= FC_RPORT_SCAN_PENDING
;
2662 scsi_queue_work(shost
, &rport
->scan_work
);
2668 transport_destroy_device(dev
);
2669 spin_lock_irqsave(shost
->host_lock
, flags
);
2670 list_del(&rport
->peers
);
2671 put_device(&shost
->shost_gendev
); /* for fc_host->rport list */
2672 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2673 put_device(dev
->parent
);
2679 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
2680 * @shost: scsi host the remote port is connected to.
2681 * @channel: Channel on shost port connected to.
2682 * @ids: The world wide names, fc address, and FC4 port
2683 * roles for the remote port.
2685 * The LLDD calls this routine to notify the transport of the existence
2686 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2687 * of the port, it's FC address (port_id), and the FC4 roles that are
2688 * active for the port.
2690 * For ports that are FCP targets (aka scsi targets), the FC transport
2691 * maintains consistent target id bindings on behalf of the LLDD.
2692 * A consistent target id binding is an assignment of a target id to
2693 * a remote port identifier, which persists while the scsi host is
2694 * attached. The remote port can disappear, then later reappear, and
2695 * it's target id assignment remains the same. This allows for shifts
2696 * in FC addressing (if binding by wwpn or wwnn) with no apparent
2697 * changes to the scsi subsystem which is based on scsi host number and
2698 * target id values. Bindings are only valid during the attachment of
2699 * the scsi host. If the host detaches, then later re-attaches, target
2700 * id bindings may change.
2702 * This routine is responsible for returning a remote port structure.
2703 * The routine will search the list of remote ports it maintains
2704 * internally on behalf of consistent target id mappings. If found, the
2705 * remote port structure will be reused. Otherwise, a new remote port
2706 * structure will be allocated.
2708 * Whenever a remote port is allocated, a new fc_remote_port class
2709 * device is created.
2711 * Should not be called from interrupt context.
2714 * This routine assumes no locks are held on entry.
2717 fc_remote_port_add(struct Scsi_Host
*shost
, int channel
,
2718 struct fc_rport_identifiers
*ids
)
2720 struct fc_internal
*fci
= to_fc_internal(shost
->transportt
);
2721 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
2722 struct fc_rport
*rport
;
2723 unsigned long flags
;
2726 /* ensure any stgt delete functions are done */
2727 fc_flush_work(shost
);
2730 * Search the list of "active" rports, for an rport that has been
2731 * deleted, but we've held off the real delete while the target
2732 * is in a "blocked" state.
2734 spin_lock_irqsave(shost
->host_lock
, flags
);
2736 list_for_each_entry(rport
, &fc_host
->rports
, peers
) {
2738 if ((rport
->port_state
== FC_PORTSTATE_BLOCKED
) &&
2739 (rport
->channel
== channel
)) {
2741 switch (fc_host
->tgtid_bind_type
) {
2742 case FC_TGTID_BIND_BY_WWPN
:
2743 case FC_TGTID_BIND_NONE
:
2744 if (rport
->port_name
== ids
->port_name
)
2747 case FC_TGTID_BIND_BY_WWNN
:
2748 if (rport
->node_name
== ids
->node_name
)
2751 case FC_TGTID_BIND_BY_ID
:
2752 if (rport
->port_id
== ids
->port_id
)
2759 memcpy(&rport
->node_name
, &ids
->node_name
,
2760 sizeof(rport
->node_name
));
2761 memcpy(&rport
->port_name
, &ids
->port_name
,
2762 sizeof(rport
->port_name
));
2763 rport
->port_id
= ids
->port_id
;
2765 rport
->port_state
= FC_PORTSTATE_ONLINE
;
2766 rport
->roles
= ids
->roles
;
2768 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2770 if (fci
->f
->dd_fcrport_size
)
2771 memset(rport
->dd_data
, 0,
2772 fci
->f
->dd_fcrport_size
);
2775 * If we were not a target, cancel the
2776 * io terminate and rport timers, and
2779 * If we were a target, but our new role
2780 * doesn't indicate a target, leave the
2781 * timers running expecting the role to
2782 * change as the target fully logs in. If
2783 * it doesn't, the target will be torn down.
2785 * If we were a target, and our role shows
2786 * we're still a target, cancel the timers
2787 * and kick off a scan.
2790 /* was a target, not in roles */
2791 if ((rport
->scsi_target_id
!= -1) &&
2792 (!(ids
->roles
& FC_PORT_ROLE_FCP_TARGET
)))
2796 * Stop the fail io and dev_loss timers.
2797 * If they flush, the port_state will
2798 * be checked and will NOOP the function.
2800 if (!cancel_delayed_work(&rport
->fail_io_work
))
2801 fc_flush_devloss(shost
);
2802 if (!cancel_delayed_work(&rport
->dev_loss_work
))
2803 fc_flush_devloss(shost
);
2805 spin_lock_irqsave(shost
->host_lock
, flags
);
2807 rport
->flags
&= ~(FC_RPORT_FAST_FAIL_TIMEDOUT
|
2808 FC_RPORT_DEVLOSS_PENDING
|
2809 FC_RPORT_DEVLOSS_CALLBK_DONE
);
2811 /* if target, initiate a scan */
2812 if (rport
->scsi_target_id
!= -1) {
2813 rport
->flags
|= FC_RPORT_SCAN_PENDING
;
2814 scsi_queue_work(shost
,
2816 spin_unlock_irqrestore(shost
->host_lock
,
2818 scsi_target_unblock(&rport
->dev
);
2820 spin_unlock_irqrestore(shost
->host_lock
,
2823 fc_bsg_goose_queue(rport
);
2831 * Search the bindings array
2832 * Note: if never a FCP target, you won't be on this list
2834 if (fc_host
->tgtid_bind_type
!= FC_TGTID_BIND_NONE
) {
2836 /* search for a matching consistent binding */
2838 list_for_each_entry(rport
, &fc_host
->rport_bindings
,
2840 if (rport
->channel
!= channel
)
2843 switch (fc_host
->tgtid_bind_type
) {
2844 case FC_TGTID_BIND_BY_WWPN
:
2845 if (rport
->port_name
== ids
->port_name
)
2848 case FC_TGTID_BIND_BY_WWNN
:
2849 if (rport
->node_name
== ids
->node_name
)
2852 case FC_TGTID_BIND_BY_ID
:
2853 if (rport
->port_id
== ids
->port_id
)
2856 case FC_TGTID_BIND_NONE
: /* to keep compiler happy */
2861 list_move_tail(&rport
->peers
, &fc_host
->rports
);
2867 memcpy(&rport
->node_name
, &ids
->node_name
,
2868 sizeof(rport
->node_name
));
2869 memcpy(&rport
->port_name
, &ids
->port_name
,
2870 sizeof(rport
->port_name
));
2871 rport
->port_id
= ids
->port_id
;
2872 rport
->roles
= ids
->roles
;
2873 rport
->port_state
= FC_PORTSTATE_ONLINE
;
2874 rport
->flags
&= ~FC_RPORT_FAST_FAIL_TIMEDOUT
;
2876 if (fci
->f
->dd_fcrport_size
)
2877 memset(rport
->dd_data
, 0,
2878 fci
->f
->dd_fcrport_size
);
2880 if (rport
->roles
& FC_PORT_ROLE_FCP_TARGET
) {
2881 /* initiate a scan of the target */
2882 rport
->flags
|= FC_RPORT_SCAN_PENDING
;
2883 scsi_queue_work(shost
, &rport
->scan_work
);
2884 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2885 scsi_target_unblock(&rport
->dev
);
2887 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2893 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2895 /* No consistent binding found - create new remote port entry */
2896 rport
= fc_rport_create(shost
, channel
, ids
);
2900 EXPORT_SYMBOL(fc_remote_port_add
);
2904 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
2905 * @rport: The remote port that no longer exists
2907 * The LLDD calls this routine to notify the transport that a remote
2908 * port is no longer part of the topology. Note: Although a port
2909 * may no longer be part of the topology, it may persist in the remote
2910 * ports displayed by the fc_host. We do this under 2 conditions:
2911 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
2912 * This allows the port to temporarily disappear, then reappear without
2913 * disrupting the SCSI device tree attached to it. During the "blocked"
2914 * period the port will still exist.
2915 * 2) If the port was a scsi target and disappears for longer than we
2916 * expect, we'll delete the port and the tear down the SCSI device tree
2917 * attached to it. However, we want to semi-persist the target id assigned
2918 * to that port if it eventually does exist. The port structure will
2919 * remain (although with minimal information) so that the target id
2922 * If the remote port is not an FCP Target, it will be fully torn down
2923 * and deallocated, including the fc_remote_port class device.
2925 * If the remote port is an FCP Target, the port will be placed in a
2926 * temporary blocked state. From the LLDD's perspective, the rport no
2927 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2928 * exists, but all sdevs on it are blocked from further I/O. The following
2931 * If the remote port does not return (signaled by a LLDD call to
2932 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2933 * scsi target is removed - killing all outstanding i/o and removing the
2934 * scsi devices attached ot it. The port structure will be marked Not
2935 * Present and be partially cleared, leaving only enough information to
2936 * recognize the remote port relative to the scsi target id binding if
2937 * it later appears. The port will remain as long as there is a valid
2938 * binding (e.g. until the user changes the binding type or unloads the
2939 * scsi host with the binding).
2941 * If the remote port returns within the dev_loss_tmo value (and matches
2942 * according to the target id binding type), the port structure will be
2943 * reused. If it is no longer a SCSI target, the target will be torn
2944 * down. If it continues to be a SCSI target, then the target will be
2945 * unblocked (allowing i/o to be resumed), and a scan will be activated
2946 * to ensure that all luns are detected.
2948 * Called from normal process context only - cannot be called from interrupt.
2951 * This routine assumes no locks are held on entry.
2954 fc_remote_port_delete(struct fc_rport
*rport
)
2956 struct Scsi_Host
*shost
= rport_to_shost(rport
);
2957 unsigned long timeout
= rport
->dev_loss_tmo
;
2958 unsigned long flags
;
2961 * No need to flush the fc_host work_q's, as all adds are synchronous.
2963 * We do need to reclaim the rport scan work element, so eventually
2964 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2965 * there's still a scan pending.
2968 spin_lock_irqsave(shost
->host_lock
, flags
);
2970 if (rport
->port_state
!= FC_PORTSTATE_ONLINE
) {
2971 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2976 * In the past, we if this was not an FCP-Target, we would
2977 * unconditionally just jump to deleting the rport.
2978 * However, rports can be used as node containers by the LLDD,
2979 * and its not appropriate to just terminate the rport at the
2980 * first sign of a loss in connectivity. The LLDD may want to
2981 * send ELS traffic to re-validate the login. If the rport is
2982 * immediately deleted, it makes it inappropriate for a node
2984 * So... we now unconditionally wait dev_loss_tmo before
2985 * destroying an rport.
2988 rport
->port_state
= FC_PORTSTATE_BLOCKED
;
2990 rport
->flags
|= FC_RPORT_DEVLOSS_PENDING
;
2992 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2994 if (rport
->roles
& FC_PORT_ROLE_FCP_INITIATOR
&&
2995 shost
->active_mode
& MODE_TARGET
)
2996 fc_tgt_it_nexus_destroy(shost
, (unsigned long)rport
);
2998 scsi_target_block(&rport
->dev
);
3000 /* see if we need to kill io faster than waiting for device loss */
3001 if ((rport
->fast_io_fail_tmo
!= -1) &&
3002 (rport
->fast_io_fail_tmo
< timeout
))
3003 fc_queue_devloss_work(shost
, &rport
->fail_io_work
,
3004 rport
->fast_io_fail_tmo
* HZ
);
3006 /* cap the length the devices can be blocked until they are deleted */
3007 fc_queue_devloss_work(shost
, &rport
->dev_loss_work
, timeout
* HZ
);
3009 EXPORT_SYMBOL(fc_remote_port_delete
);
3012 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
3013 * @rport: The remote port that changed.
3014 * @roles: New roles for this port.
3016 * Description: The LLDD calls this routine to notify the transport that the
3017 * roles on a remote port may have changed. The largest effect of this is
3018 * if a port now becomes a FCP Target, it must be allocated a
3019 * scsi target id. If the port is no longer a FCP target, any
3020 * scsi target id value assigned to it will persist in case the
3021 * role changes back to include FCP Target. No changes in the scsi
3022 * midlayer will be invoked if the role changes (in the expectation
3023 * that the role will be resumed. If it doesn't normal error processing
3026 * Should not be called from interrupt context.
3029 * This routine assumes no locks are held on entry.
3032 fc_remote_port_rolechg(struct fc_rport
*rport
, u32 roles
)
3034 struct Scsi_Host
*shost
= rport_to_shost(rport
);
3035 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
3036 unsigned long flags
;
3040 spin_lock_irqsave(shost
->host_lock
, flags
);
3041 if (roles
& FC_PORT_ROLE_FCP_TARGET
) {
3042 if (rport
->scsi_target_id
== -1) {
3043 rport
->scsi_target_id
= fc_host
->next_target_id
++;
3045 } else if (!(rport
->roles
& FC_PORT_ROLE_FCP_TARGET
))
3047 } else if (shost
->active_mode
& MODE_TARGET
) {
3048 ret
= fc_tgt_it_nexus_create(shost
, (unsigned long)rport
,
3049 (char *)&rport
->node_name
);
3051 printk(KERN_ERR
"FC Remore Port tgt nexus failed %d\n",
3055 rport
->roles
= roles
;
3057 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3061 * There may have been a delete timer running on the
3062 * port. Ensure that it is cancelled as we now know
3063 * the port is an FCP Target.
3064 * Note: we know the rport is exists and in an online
3065 * state as the LLDD would not have had an rport
3066 * reference to pass us.
3068 * Take no action on the del_timer failure as the state
3069 * machine state change will validate the
3072 if (!cancel_delayed_work(&rport
->fail_io_work
))
3073 fc_flush_devloss(shost
);
3074 if (!cancel_delayed_work(&rport
->dev_loss_work
))
3075 fc_flush_devloss(shost
);
3077 spin_lock_irqsave(shost
->host_lock
, flags
);
3078 rport
->flags
&= ~(FC_RPORT_FAST_FAIL_TIMEDOUT
|
3079 FC_RPORT_DEVLOSS_PENDING
|
3080 FC_RPORT_DEVLOSS_CALLBK_DONE
);
3081 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3083 /* ensure any stgt delete functions are done */
3084 fc_flush_work(shost
);
3086 /* initiate a scan of the target */
3087 spin_lock_irqsave(shost
->host_lock
, flags
);
3088 rport
->flags
|= FC_RPORT_SCAN_PENDING
;
3089 scsi_queue_work(shost
, &rport
->scan_work
);
3090 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3091 scsi_target_unblock(&rport
->dev
);
3094 EXPORT_SYMBOL(fc_remote_port_rolechg
);
3097 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3098 * @work: rport target that failed to reappear in the allotted time.
3100 * Description: An attempt to delete a remote port blocks, and if it fails
3101 * to return in the allotted time this gets called.
3104 fc_timeout_deleted_rport(struct work_struct
*work
)
3106 struct fc_rport
*rport
=
3107 container_of(work
, struct fc_rport
, dev_loss_work
.work
);
3108 struct Scsi_Host
*shost
= rport_to_shost(rport
);
3109 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3110 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
3111 unsigned long flags
;
3112 int do_callback
= 0;
3114 spin_lock_irqsave(shost
->host_lock
, flags
);
3116 rport
->flags
&= ~FC_RPORT_DEVLOSS_PENDING
;
3119 * If the port is ONLINE, then it came back. If it was a SCSI
3120 * target, validate it still is. If not, tear down the
3121 * scsi_target on it.
3123 if ((rport
->port_state
== FC_PORTSTATE_ONLINE
) &&
3124 (rport
->scsi_target_id
!= -1) &&
3125 !(rport
->roles
& FC_PORT_ROLE_FCP_TARGET
)) {
3126 dev_printk(KERN_ERR
, &rport
->dev
,
3127 "blocked FC remote port time out: no longer"
3128 " a FCP target, removing starget\n");
3129 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3130 scsi_target_unblock(&rport
->dev
);
3131 fc_queue_work(shost
, &rport
->stgt_delete_work
);
3135 /* NOOP state - we're flushing workq's */
3136 if (rport
->port_state
!= FC_PORTSTATE_BLOCKED
) {
3137 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3138 dev_printk(KERN_ERR
, &rport
->dev
,
3139 "blocked FC remote port time out: leaving"
3141 (rport
->scsi_target_id
!= -1) ? " and starget" : "");
3145 if ((fc_host
->tgtid_bind_type
== FC_TGTID_BIND_NONE
) ||
3146 (rport
->scsi_target_id
== -1)) {
3147 list_del(&rport
->peers
);
3148 rport
->port_state
= FC_PORTSTATE_DELETED
;
3149 dev_printk(KERN_ERR
, &rport
->dev
,
3150 "blocked FC remote port time out: removing"
3152 (rport
->scsi_target_id
!= -1) ? " and starget" : "");
3153 fc_queue_work(shost
, &rport
->rport_delete_work
);
3154 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3158 dev_printk(KERN_ERR
, &rport
->dev
,
3159 "blocked FC remote port time out: removing target and "
3160 "saving binding\n");
3162 list_move_tail(&rport
->peers
, &fc_host
->rport_bindings
);
3165 * Note: We do not remove or clear the hostdata area. This allows
3166 * host-specific target data to persist along with the
3167 * scsi_target_id. It's up to the host to manage it's hostdata area.
3171 * Reinitialize port attributes that may change if the port comes back.
3173 rport
->maxframe_size
= -1;
3174 rport
->supported_classes
= FC_COS_UNSPECIFIED
;
3175 rport
->roles
= FC_PORT_ROLE_UNKNOWN
;
3176 rport
->port_state
= FC_PORTSTATE_NOTPRESENT
;
3177 rport
->flags
&= ~FC_RPORT_FAST_FAIL_TIMEDOUT
;
3180 * Pre-emptively kill I/O rather than waiting for the work queue
3181 * item to teardown the starget. (FCOE libFC folks prefer this
3182 * and to have the rport_port_id still set when it's done).
3184 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3185 fc_terminate_rport_io(rport
);
3187 spin_lock_irqsave(shost
->host_lock
, flags
);
3189 if (rport
->port_state
== FC_PORTSTATE_NOTPRESENT
) { /* still missing */
3191 /* remove the identifiers that aren't used in the consisting binding */
3192 switch (fc_host
->tgtid_bind_type
) {
3193 case FC_TGTID_BIND_BY_WWPN
:
3194 rport
->node_name
= -1;
3195 rport
->port_id
= -1;
3197 case FC_TGTID_BIND_BY_WWNN
:
3198 rport
->port_name
= -1;
3199 rport
->port_id
= -1;
3201 case FC_TGTID_BIND_BY_ID
:
3202 rport
->node_name
= -1;
3203 rport
->port_name
= -1;
3205 case FC_TGTID_BIND_NONE
: /* to keep compiler happy */
3210 * As this only occurs if the remote port (scsi target)
3211 * went away and didn't come back - we'll remove
3212 * all attached scsi devices.
3214 rport
->flags
|= FC_RPORT_DEVLOSS_CALLBK_DONE
;
3215 fc_queue_work(shost
, &rport
->stgt_delete_work
);
3220 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3223 * Notify the driver that the rport is now dead. The LLDD will
3224 * also guarantee that any communication to the rport is terminated
3226 * Note: we set the CALLBK_DONE flag above to correspond
3228 if (do_callback
&& i
->f
->dev_loss_tmo_callbk
)
3229 i
->f
->dev_loss_tmo_callbk(rport
);
3234 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3235 * @work: rport to terminate io on.
3237 * Notes: Only requests the failure of the io, not that all are flushed
3238 * prior to returning.
3241 fc_timeout_fail_rport_io(struct work_struct
*work
)
3243 struct fc_rport
*rport
=
3244 container_of(work
, struct fc_rport
, fail_io_work
.work
);
3246 if (rport
->port_state
!= FC_PORTSTATE_BLOCKED
)
3249 rport
->flags
|= FC_RPORT_FAST_FAIL_TIMEDOUT
;
3250 fc_terminate_rport_io(rport
);
3254 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3255 * @work: remote port to be scanned.
3258 fc_scsi_scan_rport(struct work_struct
*work
)
3260 struct fc_rport
*rport
=
3261 container_of(work
, struct fc_rport
, scan_work
);
3262 struct Scsi_Host
*shost
= rport_to_shost(rport
);
3263 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3264 unsigned long flags
;
3266 if ((rport
->port_state
== FC_PORTSTATE_ONLINE
) &&
3267 (rport
->roles
& FC_PORT_ROLE_FCP_TARGET
) &&
3268 !(i
->f
->disable_target_scan
)) {
3269 scsi_scan_target(&rport
->dev
, rport
->channel
,
3270 rport
->scsi_target_id
, SCAN_WILD_CARD
, 1);
3273 spin_lock_irqsave(shost
->host_lock
, flags
);
3274 rport
->flags
&= ~FC_RPORT_SCAN_PENDING
;
3275 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3279 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3280 * @cmnd: SCSI command that scsi_eh is trying to recover
3282 * This routine can be called from a FC LLD scsi_eh callback. It
3283 * blocks the scsi_eh thread until the fc_rport leaves the
3284 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3285 * necessary to avoid the scsi_eh failing recovery actions for blocked
3286 * rports which would lead to offlined SCSI devices.
3288 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3289 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3290 * passed back to scsi_eh.
3292 int fc_block_scsi_eh(struct scsi_cmnd
*cmnd
)
3294 struct Scsi_Host
*shost
= cmnd
->device
->host
;
3295 struct fc_rport
*rport
= starget_to_rport(scsi_target(cmnd
->device
));
3296 unsigned long flags
;
3298 spin_lock_irqsave(shost
->host_lock
, flags
);
3299 while (rport
->port_state
== FC_PORTSTATE_BLOCKED
&&
3300 !(rport
->flags
& FC_RPORT_FAST_FAIL_TIMEDOUT
)) {
3301 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3303 spin_lock_irqsave(shost
->host_lock
, flags
);
3305 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3307 if (rport
->flags
& FC_RPORT_FAST_FAIL_TIMEDOUT
)
3308 return FAST_IO_FAIL
;
3312 EXPORT_SYMBOL(fc_block_scsi_eh
);
3315 * fc_vport_setup - allocates and creates a FC virtual port.
3316 * @shost: scsi host the virtual port is connected to.
3317 * @channel: Channel on shost port connected to.
3318 * @pdev: parent device for vport
3319 * @ids: The world wide names, FC4 port roles, etc for
3321 * @ret_vport: The pointer to the created vport.
3323 * Allocates and creates the vport structure, calls the parent host
3324 * to instantiate the vport, the completes w/ class and sysfs creation.
3327 * This routine assumes no locks are held on entry.
3330 fc_vport_setup(struct Scsi_Host
*shost
, int channel
, struct device
*pdev
,
3331 struct fc_vport_identifiers
*ids
, struct fc_vport
**ret_vport
)
3333 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
3334 struct fc_internal
*fci
= to_fc_internal(shost
->transportt
);
3335 struct fc_vport
*vport
;
3337 unsigned long flags
;
3343 if ( ! fci
->f
->vport_create
)
3346 size
= (sizeof(struct fc_vport
) + fci
->f
->dd_fcvport_size
);
3347 vport
= kzalloc(size
, GFP_KERNEL
);
3348 if (unlikely(!vport
)) {
3349 printk(KERN_ERR
"%s: allocation failure\n", __func__
);
3353 vport
->vport_state
= FC_VPORT_UNKNOWN
;
3354 vport
->vport_last_state
= FC_VPORT_UNKNOWN
;
3355 vport
->node_name
= ids
->node_name
;
3356 vport
->port_name
= ids
->port_name
;
3357 vport
->roles
= ids
->roles
;
3358 vport
->vport_type
= ids
->vport_type
;
3359 if (fci
->f
->dd_fcvport_size
)
3360 vport
->dd_data
= &vport
[1];
3361 vport
->shost
= shost
;
3362 vport
->channel
= channel
;
3363 vport
->flags
= FC_VPORT_CREATING
;
3364 INIT_WORK(&vport
->vport_delete_work
, fc_vport_sched_delete
);
3366 spin_lock_irqsave(shost
->host_lock
, flags
);
3368 if (fc_host
->npiv_vports_inuse
>= fc_host
->max_npiv_vports
) {
3369 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3373 fc_host
->npiv_vports_inuse
++;
3374 vport
->number
= fc_host
->next_vport_number
++;
3375 list_add_tail(&vport
->peers
, &fc_host
->vports
);
3376 get_device(&shost
->shost_gendev
); /* for fc_host->vport list */
3378 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3381 device_initialize(dev
); /* takes self reference */
3382 dev
->parent
= get_device(pdev
); /* takes parent reference */
3383 dev
->release
= fc_vport_dev_release
;
3384 dev_set_name(dev
, "vport-%d:%d-%d",
3385 shost
->host_no
, channel
, vport
->number
);
3386 transport_setup_device(dev
);
3388 error
= device_add(dev
);
3390 printk(KERN_ERR
"FC Virtual Port device_add failed\n");
3393 transport_add_device(dev
);
3394 transport_configure_device(dev
);
3396 error
= fci
->f
->vport_create(vport
, ids
->disable
);
3398 printk(KERN_ERR
"FC Virtual Port LLDD Create failed\n");
3399 goto delete_vport_all
;
3403 * if the parent isn't the physical adapter's Scsi_Host, ensure
3404 * the Scsi_Host at least contains ia symlink to the vport.
3406 if (pdev
!= &shost
->shost_gendev
) {
3407 error
= sysfs_create_link(&shost
->shost_gendev
.kobj
,
3408 &dev
->kobj
, dev_name(dev
));
3411 "%s: Cannot create vport symlinks for "
3413 __func__
, dev_name(dev
), error
);
3415 spin_lock_irqsave(shost
->host_lock
, flags
);
3416 vport
->flags
&= ~FC_VPORT_CREATING
;
3417 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3419 dev_printk(KERN_NOTICE
, pdev
,
3420 "%s created via shost%d channel %d\n", dev_name(dev
),
3421 shost
->host_no
, channel
);
3428 transport_remove_device(dev
);
3431 transport_destroy_device(dev
);
3432 spin_lock_irqsave(shost
->host_lock
, flags
);
3433 list_del(&vport
->peers
);
3434 put_device(&shost
->shost_gendev
); /* for fc_host->vport list */
3435 fc_host
->npiv_vports_inuse
--;
3436 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3437 put_device(dev
->parent
);
3444 * fc_vport_create - Admin App or LLDD requests creation of a vport
3445 * @shost: scsi host the virtual port is connected to.
3446 * @channel: channel on shost port connected to.
3447 * @ids: The world wide names, FC4 port roles, etc for
3451 * This routine assumes no locks are held on entry.
3454 fc_vport_create(struct Scsi_Host
*shost
, int channel
,
3455 struct fc_vport_identifiers
*ids
)
3458 struct fc_vport
*vport
;
3460 stat
= fc_vport_setup(shost
, channel
, &shost
->shost_gendev
,
3462 return stat
? NULL
: vport
;
3464 EXPORT_SYMBOL(fc_vport_create
);
3467 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3468 * @vport: fc_vport to be terminated
3470 * Calls the LLDD vport_delete() function, then deallocates and removes
3471 * the vport from the shost and object tree.
3474 * This routine assumes no locks are held on entry.
3477 fc_vport_terminate(struct fc_vport
*vport
)
3479 struct Scsi_Host
*shost
= vport_to_shost(vport
);
3480 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
3481 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3482 struct device
*dev
= &vport
->dev
;
3483 unsigned long flags
;
3486 if (i
->f
->vport_delete
)
3487 stat
= i
->f
->vport_delete(vport
);
3491 spin_lock_irqsave(shost
->host_lock
, flags
);
3492 vport
->flags
&= ~FC_VPORT_DELETING
;
3494 vport
->flags
|= FC_VPORT_DELETED
;
3495 list_del(&vport
->peers
);
3496 fc_host
->npiv_vports_inuse
--;
3497 put_device(&shost
->shost_gendev
); /* for fc_host->vport list */
3499 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3504 if (dev
->parent
!= &shost
->shost_gendev
)
3505 sysfs_remove_link(&shost
->shost_gendev
.kobj
, dev_name(dev
));
3506 transport_remove_device(dev
);
3508 transport_destroy_device(dev
);
3511 * Removing our self-reference should mean our
3512 * release function gets called, which will drop the remaining
3513 * parent reference and free the data structure.
3515 put_device(dev
); /* for self-reference */
3517 return 0; /* SUCCESS */
3519 EXPORT_SYMBOL(fc_vport_terminate
);
3522 * fc_vport_sched_delete - workq-based delete request for a vport
3523 * @work: vport to be deleted.
3526 fc_vport_sched_delete(struct work_struct
*work
)
3528 struct fc_vport
*vport
=
3529 container_of(work
, struct fc_vport
, vport_delete_work
);
3532 stat
= fc_vport_terminate(vport
);
3534 dev_printk(KERN_ERR
, vport
->dev
.parent
,
3535 "%s: %s could not be deleted created via "
3536 "shost%d channel %d - error %d\n", __func__
,
3537 dev_name(&vport
->dev
), vport
->shost
->host_no
,
3538 vport
->channel
, stat
);
3548 * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job
3549 * @job: fc_bsg_job that is to be torn down
3552 fc_destroy_bsgjob(struct fc_bsg_job
*job
)
3554 unsigned long flags
;
3556 spin_lock_irqsave(&job
->job_lock
, flags
);
3558 spin_unlock_irqrestore(&job
->job_lock
, flags
);
3561 spin_unlock_irqrestore(&job
->job_lock
, flags
);
3563 put_device(job
->dev
); /* release reference for the request */
3565 kfree(job
->request_payload
.sg_list
);
3566 kfree(job
->reply_payload
.sg_list
);
3571 * fc_bsg_jobdone - completion routine for bsg requests that the LLD has
3573 * @job: fc_bsg_job that is complete
3576 fc_bsg_jobdone(struct fc_bsg_job
*job
)
3578 struct request
*req
= job
->req
;
3579 struct request
*rsp
= req
->next_rq
;
3582 err
= job
->req
->errors
= job
->reply
->result
;
3585 /* we're only returning the result field in the reply */
3586 job
->req
->sense_len
= sizeof(uint32_t);
3588 job
->req
->sense_len
= job
->reply_len
;
3590 /* we assume all request payload was transferred, residual == 0 */
3594 WARN_ON(job
->reply
->reply_payload_rcv_len
> rsp
->resid_len
);
3596 /* set reply (bidi) residual */
3597 rsp
->resid_len
-= min(job
->reply
->reply_payload_rcv_len
,
3600 blk_complete_request(req
);
3604 * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests
3605 * @rq: BSG request that holds the job to be destroyed
3607 static void fc_bsg_softirq_done(struct request
*rq
)
3609 struct fc_bsg_job
*job
= rq
->special
;
3610 unsigned long flags
;
3612 spin_lock_irqsave(&job
->job_lock
, flags
);
3613 job
->state_flags
|= FC_RQST_STATE_DONE
;
3615 spin_unlock_irqrestore(&job
->job_lock
, flags
);
3617 blk_end_request_all(rq
, rq
->errors
);
3618 fc_destroy_bsgjob(job
);
3622 * fc_bsg_job_timeout - handler for when a bsg request timesout
3623 * @req: request that timed out
3625 static enum blk_eh_timer_return
3626 fc_bsg_job_timeout(struct request
*req
)
3628 struct fc_bsg_job
*job
= (void *) req
->special
;
3629 struct Scsi_Host
*shost
= job
->shost
;
3630 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3631 unsigned long flags
;
3632 int err
= 0, done
= 0;
3634 if (job
->rport
&& job
->rport
->port_state
== FC_PORTSTATE_BLOCKED
)
3635 return BLK_EH_RESET_TIMER
;
3637 spin_lock_irqsave(&job
->job_lock
, flags
);
3638 if (job
->state_flags
& FC_RQST_STATE_DONE
)
3642 spin_unlock_irqrestore(&job
->job_lock
, flags
);
3644 if (!done
&& i
->f
->bsg_timeout
) {
3645 /* call LLDD to abort the i/o as it has timed out */
3646 err
= i
->f
->bsg_timeout(job
);
3647 if (err
== -EAGAIN
) {
3649 return BLK_EH_RESET_TIMER
;
3651 printk(KERN_ERR
"ERROR: FC BSG request timeout - LLD "
3652 "abort failed with status %d\n", err
);
3655 /* the blk_end_sync_io() doesn't check the error */
3657 return BLK_EH_NOT_HANDLED
;
3659 return BLK_EH_HANDLED
;
3663 fc_bsg_map_buffer(struct fc_bsg_buffer
*buf
, struct request
*req
)
3665 size_t sz
= (sizeof(struct scatterlist
) * req
->nr_phys_segments
);
3667 BUG_ON(!req
->nr_phys_segments
);
3669 buf
->sg_list
= kzalloc(sz
, GFP_KERNEL
);
3672 sg_init_table(buf
->sg_list
, req
->nr_phys_segments
);
3673 buf
->sg_cnt
= blk_rq_map_sg(req
->q
, req
, buf
->sg_list
);
3674 buf
->payload_len
= blk_rq_bytes(req
);
3680 * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the
3682 * @shost: SCSI Host corresponding to the bsg object
3683 * @rport: (optional) FC Remote Port corresponding to the bsg object
3684 * @req: BSG request that needs a job structure
3687 fc_req_to_bsgjob(struct Scsi_Host
*shost
, struct fc_rport
*rport
,
3688 struct request
*req
)
3690 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3691 struct request
*rsp
= req
->next_rq
;
3692 struct fc_bsg_job
*job
;
3695 BUG_ON(req
->special
);
3697 job
= kzalloc(sizeof(struct fc_bsg_job
) + i
->f
->dd_bsg_size
,
3703 * Note: this is a bit silly.
3704 * The request gets formatted as a SGIO v4 ioctl request, which
3705 * then gets reformatted as a blk request, which then gets
3706 * reformatted as a fc bsg request. And on completion, we have
3707 * to wrap return results such that SGIO v4 thinks it was a scsi
3708 * status. I hope this was all worth it.
3715 if (i
->f
->dd_bsg_size
)
3716 job
->dd_data
= (void *)&job
[1];
3717 spin_lock_init(&job
->job_lock
);
3718 job
->request
= (struct fc_bsg_request
*)req
->cmd
;
3719 job
->request_len
= req
->cmd_len
;
3720 job
->reply
= req
->sense
;
3721 job
->reply_len
= SCSI_SENSE_BUFFERSIZE
; /* Size of sense buffer
3724 ret
= fc_bsg_map_buffer(&job
->request_payload
, req
);
3726 goto failjob_rls_job
;
3728 if (rsp
&& rsp
->bio
) {
3729 ret
= fc_bsg_map_buffer(&job
->reply_payload
, rsp
);
3731 goto failjob_rls_rqst_payload
;
3733 job
->job_done
= fc_bsg_jobdone
;
3735 job
->dev
= &rport
->dev
;
3737 job
->dev
= &shost
->shost_gendev
;
3738 get_device(job
->dev
); /* take a reference for the request */
3745 failjob_rls_rqst_payload
:
3746 kfree(job
->request_payload
.sg_list
);
3753 enum fc_dispatch_result
{
3754 FC_DISPATCH_BREAK
, /* on return, q is locked, break from q loop */
3755 FC_DISPATCH_LOCKED
, /* on return, q is locked, continue on */
3756 FC_DISPATCH_UNLOCKED
, /* on return, q is unlocked, continue on */
3761 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
3762 * @q: fc host request queue
3763 * @shost: scsi host rport attached to
3764 * @job: bsg job to be processed
3766 static enum fc_dispatch_result
3767 fc_bsg_host_dispatch(struct request_queue
*q
, struct Scsi_Host
*shost
,
3768 struct fc_bsg_job
*job
)
3770 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3771 int cmdlen
= sizeof(uint32_t); /* start with length of msgcode */
3774 /* Validate the host command */
3775 switch (job
->request
->msgcode
) {
3776 case FC_BSG_HST_ADD_RPORT
:
3777 cmdlen
+= sizeof(struct fc_bsg_host_add_rport
);
3780 case FC_BSG_HST_DEL_RPORT
:
3781 cmdlen
+= sizeof(struct fc_bsg_host_del_rport
);
3784 case FC_BSG_HST_ELS_NOLOGIN
:
3785 cmdlen
+= sizeof(struct fc_bsg_host_els
);
3786 /* there better be a xmt and rcv payloads */
3787 if ((!job
->request_payload
.payload_len
) ||
3788 (!job
->reply_payload
.payload_len
)) {
3795 cmdlen
+= sizeof(struct fc_bsg_host_ct
);
3796 /* there better be xmt and rcv payloads */
3797 if ((!job
->request_payload
.payload_len
) ||
3798 (!job
->reply_payload
.payload_len
)) {
3804 case FC_BSG_HST_VENDOR
:
3805 cmdlen
+= sizeof(struct fc_bsg_host_vendor
);
3806 if ((shost
->hostt
->vendor_id
== 0L) ||
3807 (job
->request
->rqst_data
.h_vendor
.vendor_id
!=
3808 shost
->hostt
->vendor_id
)) {
3819 /* check if we really have all the request data needed */
3820 if (job
->request_len
< cmdlen
) {
3825 ret
= i
->f
->bsg_request(job
);
3827 return FC_DISPATCH_UNLOCKED
;
3830 /* return the errno failure code as the only status */
3831 BUG_ON(job
->reply_len
< sizeof(uint32_t));
3832 job
->reply
->reply_payload_rcv_len
= 0;
3833 job
->reply
->result
= ret
;
3834 job
->reply_len
= sizeof(uint32_t);
3835 fc_bsg_jobdone(job
);
3836 return FC_DISPATCH_UNLOCKED
;
3841 * fc_bsg_goose_queue - restart rport queue in case it was stopped
3842 * @rport: rport to be restarted
3845 fc_bsg_goose_queue(struct fc_rport
*rport
)
3851 * This get/put dance makes no sense
3853 get_device(&rport
->dev
);
3854 blk_run_queue_async(rport
->rqst_q
);
3855 put_device(&rport
->dev
);
3859 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
3860 * @q: rport request queue
3861 * @shost: scsi host rport attached to
3862 * @rport: rport request destined to
3863 * @job: bsg job to be processed
3865 static enum fc_dispatch_result
3866 fc_bsg_rport_dispatch(struct request_queue
*q
, struct Scsi_Host
*shost
,
3867 struct fc_rport
*rport
, struct fc_bsg_job
*job
)
3869 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3870 int cmdlen
= sizeof(uint32_t); /* start with length of msgcode */
3873 /* Validate the rport command */
3874 switch (job
->request
->msgcode
) {
3875 case FC_BSG_RPT_ELS
:
3876 cmdlen
+= sizeof(struct fc_bsg_rport_els
);
3880 cmdlen
+= sizeof(struct fc_bsg_rport_ct
);
3882 /* there better be xmt and rcv payloads */
3883 if ((!job
->request_payload
.payload_len
) ||
3884 (!job
->reply_payload
.payload_len
)) {
3886 goto fail_rport_msg
;
3891 goto fail_rport_msg
;
3894 /* check if we really have all the request data needed */
3895 if (job
->request_len
< cmdlen
) {
3897 goto fail_rport_msg
;
3900 ret
= i
->f
->bsg_request(job
);
3902 return FC_DISPATCH_UNLOCKED
;
3905 /* return the errno failure code as the only status */
3906 BUG_ON(job
->reply_len
< sizeof(uint32_t));
3907 job
->reply
->reply_payload_rcv_len
= 0;
3908 job
->reply
->result
= ret
;
3909 job
->reply_len
= sizeof(uint32_t);
3910 fc_bsg_jobdone(job
);
3911 return FC_DISPATCH_UNLOCKED
;
3916 * fc_bsg_request_handler - generic handler for bsg requests
3917 * @q: request queue to manage
3918 * @shost: Scsi_Host related to the bsg object
3919 * @rport: FC remote port related to the bsg object (optional)
3920 * @dev: device structure for bsg object
3923 fc_bsg_request_handler(struct request_queue
*q
, struct Scsi_Host
*shost
,
3924 struct fc_rport
*rport
, struct device
*dev
)
3926 struct request
*req
;
3927 struct fc_bsg_job
*job
;
3928 enum fc_dispatch_result ret
;
3930 if (!get_device(dev
))
3934 if (rport
&& (rport
->port_state
== FC_PORTSTATE_BLOCKED
) &&
3935 !(rport
->flags
& FC_RPORT_FAST_FAIL_TIMEDOUT
))
3938 req
= blk_fetch_request(q
);
3942 if (rport
&& (rport
->port_state
!= FC_PORTSTATE_ONLINE
)) {
3943 req
->errors
= -ENXIO
;
3944 spin_unlock_irq(q
->queue_lock
);
3945 blk_end_request_all(req
, -ENXIO
);
3946 spin_lock_irq(q
->queue_lock
);
3950 spin_unlock_irq(q
->queue_lock
);
3952 ret
= fc_req_to_bsgjob(shost
, rport
, req
);
3955 blk_end_request_all(req
, ret
);
3956 spin_lock_irq(q
->queue_lock
);
3962 /* check if we have the msgcode value at least */
3963 if (job
->request_len
< sizeof(uint32_t)) {
3964 BUG_ON(job
->reply_len
< sizeof(uint32_t));
3965 job
->reply
->reply_payload_rcv_len
= 0;
3966 job
->reply
->result
= -ENOMSG
;
3967 job
->reply_len
= sizeof(uint32_t);
3968 fc_bsg_jobdone(job
);
3969 spin_lock_irq(q
->queue_lock
);
3973 /* the dispatch routines will unlock the queue_lock */
3975 ret
= fc_bsg_rport_dispatch(q
, shost
, rport
, job
);
3977 ret
= fc_bsg_host_dispatch(q
, shost
, job
);
3979 /* did dispatcher hit state that can't process any more */
3980 if (ret
== FC_DISPATCH_BREAK
)
3983 /* did dispatcher had released the lock */
3984 if (ret
== FC_DISPATCH_UNLOCKED
)
3985 spin_lock_irq(q
->queue_lock
);
3988 spin_unlock_irq(q
->queue_lock
);
3990 spin_lock_irq(q
->queue_lock
);
3995 * fc_bsg_host_handler - handler for bsg requests for a fc host
3996 * @q: fc host request queue
3999 fc_bsg_host_handler(struct request_queue
*q
)
4001 struct Scsi_Host
*shost
= q
->queuedata
;
4003 fc_bsg_request_handler(q
, shost
, NULL
, &shost
->shost_gendev
);
4008 * fc_bsg_rport_handler - handler for bsg requests for a fc rport
4009 * @q: rport request queue
4012 fc_bsg_rport_handler(struct request_queue
*q
)
4014 struct fc_rport
*rport
= q
->queuedata
;
4015 struct Scsi_Host
*shost
= rport_to_shost(rport
);
4017 fc_bsg_request_handler(q
, shost
, rport
, &rport
->dev
);
4022 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
4023 * @shost: shost for fc_host
4024 * @fc_host: fc_host adding the structures to
4027 fc_bsg_hostadd(struct Scsi_Host
*shost
, struct fc_host_attrs
*fc_host
)
4029 struct device
*dev
= &shost
->shost_gendev
;
4030 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
4031 struct request_queue
*q
;
4035 fc_host
->rqst_q
= NULL
;
4037 if (!i
->f
->bsg_request
)
4040 snprintf(bsg_name
, sizeof(bsg_name
),
4041 "fc_host%d", shost
->host_no
);
4043 q
= __scsi_alloc_queue(shost
, fc_bsg_host_handler
);
4045 printk(KERN_ERR
"fc_host%d: bsg interface failed to "
4046 "initialize - no request queue\n",
4051 q
->queuedata
= shost
;
4052 queue_flag_set_unlocked(QUEUE_FLAG_BIDI
, q
);
4053 blk_queue_softirq_done(q
, fc_bsg_softirq_done
);
4054 blk_queue_rq_timed_out(q
, fc_bsg_job_timeout
);
4055 blk_queue_rq_timeout(q
, FC_DEFAULT_BSG_TIMEOUT
);
4057 err
= bsg_register_queue(q
, dev
, bsg_name
, NULL
);
4059 printk(KERN_ERR
"fc_host%d: bsg interface failed to "
4060 "initialize - register queue\n",
4062 blk_cleanup_queue(q
);
4066 fc_host
->rqst_q
= q
;
4072 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
4073 * @shost: shost that rport is attached to
4074 * @rport: rport that the bsg hooks are being attached to
4077 fc_bsg_rportadd(struct Scsi_Host
*shost
, struct fc_rport
*rport
)
4079 struct device
*dev
= &rport
->dev
;
4080 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
4081 struct request_queue
*q
;
4084 rport
->rqst_q
= NULL
;
4086 if (!i
->f
->bsg_request
)
4089 q
= __scsi_alloc_queue(shost
, fc_bsg_rport_handler
);
4091 printk(KERN_ERR
"%s: bsg interface failed to "
4092 "initialize - no request queue\n",
4097 q
->queuedata
= rport
;
4098 queue_flag_set_unlocked(QUEUE_FLAG_BIDI
, q
);
4099 blk_queue_softirq_done(q
, fc_bsg_softirq_done
);
4100 blk_queue_rq_timed_out(q
, fc_bsg_job_timeout
);
4101 blk_queue_rq_timeout(q
, BLK_DEFAULT_SG_TIMEOUT
);
4103 err
= bsg_register_queue(q
, dev
, NULL
, NULL
);
4105 printk(KERN_ERR
"%s: bsg interface failed to "
4106 "initialize - register queue\n",
4108 blk_cleanup_queue(q
);
4118 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
4119 * @q: the request_queue that is to be torn down.
4122 * Before unregistering the queue empty any requests that are blocked
4127 fc_bsg_remove(struct request_queue
*q
)
4129 struct request
*req
; /* block request */
4130 int counts
; /* totals for request_list count and starved */
4133 /* Stop taking in new requests */
4134 spin_lock_irq(q
->queue_lock
);
4137 /* drain all requests in the queue */
4139 /* need the lock to fetch a request
4140 * this may fetch the same reqeust as the previous pass
4142 req
= blk_fetch_request(q
);
4143 /* save requests in use and starved */
4144 counts
= q
->rq
.count
[0] + q
->rq
.count
[1] +
4145 q
->rq
.starved
[0] + q
->rq
.starved
[1];
4146 spin_unlock_irq(q
->queue_lock
);
4147 /* any requests still outstanding? */
4151 /* This may be the same req as the previous iteration,
4152 * always send the blk_end_request_all after a prefetch.
4153 * It is not okay to not end the request because the
4154 * prefetch started the request.
4157 /* return -ENXIO to indicate that this queue is
4160 req
->errors
= -ENXIO
;
4161 blk_end_request_all(req
, -ENXIO
);
4164 msleep(200); /* allow bsg to possibly finish */
4165 spin_lock_irq(q
->queue_lock
);
4168 bsg_unregister_queue(q
);
4169 blk_cleanup_queue(q
);
4174 /* Original Author: Martin Hicks */
4175 MODULE_AUTHOR("James Smart");
4176 MODULE_DESCRIPTION("FC Transport Attributes");
4177 MODULE_LICENSE("GPL");
4179 module_init(fc_transport_init
);
4180 module_exit(fc_transport_exit
);