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 22
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
));
403 fc_host
->port_id
= -1;
404 fc_host
->port_type
= FC_PORTTYPE_UNKNOWN
;
405 fc_host
->port_state
= FC_PORTSTATE_UNKNOWN
;
406 memset(fc_host
->active_fc4s
, 0,
407 sizeof(fc_host
->active_fc4s
));
408 fc_host
->speed
= FC_PORTSPEED_UNKNOWN
;
409 fc_host
->fabric_name
= -1;
410 memset(fc_host
->symbolic_name
, 0, sizeof(fc_host
->symbolic_name
));
411 memset(fc_host
->system_hostname
, 0, sizeof(fc_host
->system_hostname
));
413 fc_host
->tgtid_bind_type
= FC_TGTID_BIND_BY_WWPN
;
415 INIT_LIST_HEAD(&fc_host
->rports
);
416 INIT_LIST_HEAD(&fc_host
->rport_bindings
);
417 INIT_LIST_HEAD(&fc_host
->vports
);
418 fc_host
->next_rport_number
= 0;
419 fc_host
->next_target_id
= 0;
420 fc_host
->next_vport_number
= 0;
421 fc_host
->npiv_vports_inuse
= 0;
423 snprintf(fc_host
->work_q_name
, sizeof(fc_host
->work_q_name
),
424 "fc_wq_%d", shost
->host_no
);
425 fc_host
->work_q
= create_singlethread_workqueue(
426 fc_host
->work_q_name
);
427 if (!fc_host
->work_q
)
430 fc_host
->dev_loss_tmo
= fc_dev_loss_tmo
;
431 snprintf(fc_host
->devloss_work_q_name
,
432 sizeof(fc_host
->devloss_work_q_name
),
433 "fc_dl_%d", shost
->host_no
);
434 fc_host
->devloss_work_q
= create_singlethread_workqueue(
435 fc_host
->devloss_work_q_name
);
436 if (!fc_host
->devloss_work_q
) {
437 destroy_workqueue(fc_host
->work_q
);
438 fc_host
->work_q
= NULL
;
442 fc_bsg_hostadd(shost
, fc_host
);
443 /* ignore any bsg add error - we just can't do sgio */
448 static int fc_host_remove(struct transport_container
*tc
, struct device
*dev
,
451 struct Scsi_Host
*shost
= dev_to_shost(dev
);
452 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
454 fc_bsg_remove(fc_host
->rqst_q
);
458 static DECLARE_TRANSPORT_CLASS(fc_host_class
,
465 * Setup and Remove actions for remote ports are handled
466 * in the service functions below.
468 static DECLARE_TRANSPORT_CLASS(fc_rport_class
,
475 * Setup and Remove actions for virtual ports are handled
476 * in the service functions below.
478 static DECLARE_TRANSPORT_CLASS(fc_vport_class
,
485 * Netlink Infrastructure
488 static atomic_t fc_event_seq
;
491 * fc_get_event_number - Obtain the next sequential FC event number
494 * We could have inlined this, but it would have required fc_event_seq to
495 * be exposed. For now, live with the subroutine call.
496 * Atomic used to avoid lock/unlock...
499 fc_get_event_number(void)
501 return atomic_add_return(1, &fc_event_seq
);
503 EXPORT_SYMBOL(fc_get_event_number
);
507 * fc_host_post_event - called to post an even on an fc_host.
508 * @shost: host the event occurred on
509 * @event_number: fc event number obtained from get_fc_event_number()
510 * @event_code: fc_host event being posted
511 * @event_data: 32bits of data for the event being posted
514 * This routine assumes no locks are held on entry.
517 fc_host_post_event(struct Scsi_Host
*shost
, u32 event_number
,
518 enum fc_host_event_code event_code
, u32 event_data
)
521 struct nlmsghdr
*nlh
;
522 struct fc_nl_event
*event
;
532 len
= FC_NL_MSGALIGN(sizeof(*event
));
533 skblen
= NLMSG_SPACE(len
);
535 skb
= alloc_skb(skblen
, GFP_KERNEL
);
541 nlh
= nlmsg_put(skb
, 0, 0, SCSI_TRANSPORT_MSG
,
542 skblen
- sizeof(*nlh
), 0);
547 event
= NLMSG_DATA(nlh
);
549 INIT_SCSI_NL_HDR(&event
->snlh
, SCSI_NL_TRANSPORT_FC
,
550 FC_NL_ASYNC_EVENT
, len
);
551 event
->seconds
= get_seconds();
552 event
->vendor_id
= 0;
553 event
->host_no
= shost
->host_no
;
554 event
->event_datalen
= sizeof(u32
); /* bytes */
555 event
->event_num
= event_number
;
556 event
->event_code
= event_code
;
557 event
->event_data
= event_data
;
559 nlmsg_multicast(scsi_nl_sock
, skb
, 0, SCSI_NL_GRP_FC_EVENTS
,
566 name
= get_fc_host_event_code_name(event_code
);
568 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
569 __func__
, shost
->host_no
,
570 (name
) ? name
: "<unknown>", event_data
, err
);
573 EXPORT_SYMBOL(fc_host_post_event
);
577 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
578 * @shost: host the event occurred on
579 * @event_number: fc event number obtained from get_fc_event_number()
580 * @data_len: amount, in bytes, of vendor unique data
581 * @data_buf: pointer to vendor unique data
582 * @vendor_id: Vendor id
585 * This routine assumes no locks are held on entry.
588 fc_host_post_vendor_event(struct Scsi_Host
*shost
, u32 event_number
,
589 u32 data_len
, char * data_buf
, u64 vendor_id
)
592 struct nlmsghdr
*nlh
;
593 struct fc_nl_event
*event
;
599 goto send_vendor_fail
;
602 len
= FC_NL_MSGALIGN(sizeof(*event
) + data_len
);
603 skblen
= NLMSG_SPACE(len
);
605 skb
= alloc_skb(skblen
, GFP_KERNEL
);
608 goto send_vendor_fail
;
611 nlh
= nlmsg_put(skb
, 0, 0, SCSI_TRANSPORT_MSG
,
612 skblen
- sizeof(*nlh
), 0);
615 goto send_vendor_fail_skb
;
617 event
= NLMSG_DATA(nlh
);
619 INIT_SCSI_NL_HDR(&event
->snlh
, SCSI_NL_TRANSPORT_FC
,
620 FC_NL_ASYNC_EVENT
, len
);
621 event
->seconds
= get_seconds();
622 event
->vendor_id
= vendor_id
;
623 event
->host_no
= shost
->host_no
;
624 event
->event_datalen
= data_len
; /* bytes */
625 event
->event_num
= event_number
;
626 event
->event_code
= FCH_EVT_VENDOR_UNIQUE
;
627 memcpy(&event
->event_data
, data_buf
, data_len
);
629 nlmsg_multicast(scsi_nl_sock
, skb
, 0, SCSI_NL_GRP_FC_EVENTS
,
633 send_vendor_fail_skb
:
637 "%s: Dropped Event : host %d vendor_unique - err %d\n",
638 __func__
, shost
->host_no
, err
);
641 EXPORT_SYMBOL(fc_host_post_vendor_event
);
645 static __init
int fc_transport_init(void)
649 atomic_set(&fc_event_seq
, 0);
651 error
= transport_class_register(&fc_host_class
);
654 error
= transport_class_register(&fc_vport_class
);
656 goto unreg_host_class
;
657 error
= transport_class_register(&fc_rport_class
);
659 goto unreg_vport_class
;
660 error
= transport_class_register(&fc_transport_class
);
662 goto unreg_rport_class
;
666 transport_class_unregister(&fc_rport_class
);
668 transport_class_unregister(&fc_vport_class
);
670 transport_class_unregister(&fc_host_class
);
674 static void __exit
fc_transport_exit(void)
676 transport_class_unregister(&fc_transport_class
);
677 transport_class_unregister(&fc_rport_class
);
678 transport_class_unregister(&fc_host_class
);
679 transport_class_unregister(&fc_vport_class
);
683 * FC Remote Port Attribute Management
686 #define fc_rport_show_function(field, format_string, sz, cast) \
688 show_fc_rport_##field (struct device *dev, \
689 struct device_attribute *attr, char *buf) \
691 struct fc_rport *rport = transport_class_to_rport(dev); \
692 struct Scsi_Host *shost = rport_to_shost(rport); \
693 struct fc_internal *i = to_fc_internal(shost->transportt); \
694 if ((i->f->get_rport_##field) && \
695 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
696 (rport->port_state == FC_PORTSTATE_DELETED) || \
697 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
698 i->f->get_rport_##field(rport); \
699 return snprintf(buf, sz, format_string, cast rport->field); \
702 #define fc_rport_store_function(field) \
704 store_fc_rport_##field(struct device *dev, \
705 struct device_attribute *attr, \
706 const char *buf, size_t count) \
709 struct fc_rport *rport = transport_class_to_rport(dev); \
710 struct Scsi_Host *shost = rport_to_shost(rport); \
711 struct fc_internal *i = to_fc_internal(shost->transportt); \
713 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
714 (rport->port_state == FC_PORTSTATE_DELETED) || \
715 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
717 val = simple_strtoul(buf, &cp, 0); \
718 if (*cp && (*cp != '\n')) \
720 i->f->set_rport_##field(rport, val); \
724 #define fc_rport_rd_attr(field, format_string, sz) \
725 fc_rport_show_function(field, format_string, sz, ) \
726 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
727 show_fc_rport_##field, NULL)
729 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
730 fc_rport_show_function(field, format_string, sz, (cast)) \
731 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
732 show_fc_rport_##field, NULL)
734 #define fc_rport_rw_attr(field, format_string, sz) \
735 fc_rport_show_function(field, format_string, sz, ) \
736 fc_rport_store_function(field) \
737 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
738 show_fc_rport_##field, \
739 store_fc_rport_##field)
742 #define fc_private_rport_show_function(field, format_string, sz, cast) \
744 show_fc_rport_##field (struct device *dev, \
745 struct device_attribute *attr, char *buf) \
747 struct fc_rport *rport = transport_class_to_rport(dev); \
748 return snprintf(buf, sz, format_string, cast rport->field); \
751 #define fc_private_rport_rd_attr(field, format_string, sz) \
752 fc_private_rport_show_function(field, format_string, sz, ) \
753 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
754 show_fc_rport_##field, NULL)
756 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
757 fc_private_rport_show_function(field, format_string, sz, (cast)) \
758 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
759 show_fc_rport_##field, NULL)
762 #define fc_private_rport_rd_enum_attr(title, maxlen) \
764 show_fc_rport_##title (struct device *dev, \
765 struct device_attribute *attr, char *buf) \
767 struct fc_rport *rport = transport_class_to_rport(dev); \
769 name = get_fc_##title##_name(rport->title); \
772 return snprintf(buf, maxlen, "%s\n", name); \
774 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
775 show_fc_rport_##title, NULL)
778 #define SETUP_RPORT_ATTRIBUTE_RD(field) \
779 i->private_rport_attrs[count] = device_attr_rport_##field; \
780 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
781 i->private_rport_attrs[count].store = NULL; \
782 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
783 if (i->f->show_rport_##field) \
786 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
787 i->private_rport_attrs[count] = device_attr_rport_##field; \
788 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
789 i->private_rport_attrs[count].store = NULL; \
790 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
793 #define SETUP_RPORT_ATTRIBUTE_RW(field) \
794 i->private_rport_attrs[count] = device_attr_rport_##field; \
795 if (!i->f->set_rport_##field) { \
796 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
797 i->private_rport_attrs[count].store = NULL; \
799 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
800 if (i->f->show_rport_##field) \
803 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
805 i->private_rport_attrs[count] = device_attr_rport_##field; \
806 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
811 /* The FC Transport Remote Port Attributes: */
813 /* Fixed Remote Port Attributes */
815 fc_private_rport_rd_attr(maxframe_size
, "%u bytes\n", 20);
818 show_fc_rport_supported_classes (struct device
*dev
,
819 struct device_attribute
*attr
, char *buf
)
821 struct fc_rport
*rport
= transport_class_to_rport(dev
);
822 if (rport
->supported_classes
== FC_COS_UNSPECIFIED
)
823 return snprintf(buf
, 20, "unspecified\n");
824 return get_fc_cos_names(rport
->supported_classes
, buf
);
826 static FC_DEVICE_ATTR(rport
, supported_classes
, S_IRUGO
,
827 show_fc_rport_supported_classes
, NULL
);
829 /* Dynamic Remote Port Attributes */
832 * dev_loss_tmo attribute
834 static int fc_str_to_dev_loss(const char *buf
, unsigned long *val
)
838 *val
= simple_strtoul(buf
, &cp
, 0);
839 if ((*cp
&& (*cp
!= '\n')) || (*val
< 0))
842 * Check for overflow; dev_loss_tmo is u32
850 static int fc_rport_set_dev_loss_tmo(struct fc_rport
*rport
,
853 struct Scsi_Host
*shost
= rport_to_shost(rport
);
854 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
856 if ((rport
->port_state
== FC_PORTSTATE_BLOCKED
) ||
857 (rport
->port_state
== FC_PORTSTATE_DELETED
) ||
858 (rport
->port_state
== FC_PORTSTATE_NOTPRESENT
))
861 * Check for overflow; dev_loss_tmo is u32
867 * If fast_io_fail is off we have to cap
868 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
870 if (rport
->fast_io_fail_tmo
== -1 &&
871 val
> SCSI_DEVICE_BLOCK_MAX_TIMEOUT
)
874 i
->f
->set_rport_dev_loss_tmo(rport
, val
);
878 fc_rport_show_function(dev_loss_tmo
, "%d\n", 20, )
880 store_fc_rport_dev_loss_tmo(struct device
*dev
, struct device_attribute
*attr
,
881 const char *buf
, size_t count
)
883 struct fc_rport
*rport
= transport_class_to_rport(dev
);
887 rc
= fc_str_to_dev_loss(buf
, &val
);
891 rc
= fc_rport_set_dev_loss_tmo(rport
, val
);
896 static FC_DEVICE_ATTR(rport
, dev_loss_tmo
, S_IRUGO
| S_IWUSR
,
897 show_fc_rport_dev_loss_tmo
, store_fc_rport_dev_loss_tmo
);
900 /* Private Remote Port Attributes */
902 fc_private_rport_rd_attr_cast(node_name
, "0x%llx\n", 20, unsigned long long);
903 fc_private_rport_rd_attr_cast(port_name
, "0x%llx\n", 20, unsigned long long);
904 fc_private_rport_rd_attr(port_id
, "0x%06x\n", 20);
907 show_fc_rport_roles (struct device
*dev
, struct device_attribute
*attr
,
910 struct fc_rport
*rport
= transport_class_to_rport(dev
);
912 /* identify any roles that are port_id specific */
913 if ((rport
->port_id
!= -1) &&
914 (rport
->port_id
& FC_WELLKNOWN_PORTID_MASK
) ==
915 FC_WELLKNOWN_PORTID_MASK
) {
916 switch (rport
->port_id
& FC_WELLKNOWN_ROLE_MASK
) {
917 case FC_FPORT_PORTID
:
918 return snprintf(buf
, 30, "Fabric Port\n");
919 case FC_FABCTLR_PORTID
:
920 return snprintf(buf
, 30, "Fabric Controller\n");
921 case FC_DIRSRVR_PORTID
:
922 return snprintf(buf
, 30, "Directory Server\n");
923 case FC_TIMESRVR_PORTID
:
924 return snprintf(buf
, 30, "Time Server\n");
925 case FC_MGMTSRVR_PORTID
:
926 return snprintf(buf
, 30, "Management Server\n");
928 return snprintf(buf
, 30, "Unknown Fabric Entity\n");
931 if (rport
->roles
== FC_PORT_ROLE_UNKNOWN
)
932 return snprintf(buf
, 20, "unknown\n");
933 return get_fc_port_roles_names(rport
->roles
, buf
);
936 static FC_DEVICE_ATTR(rport
, roles
, S_IRUGO
,
937 show_fc_rport_roles
, NULL
);
939 fc_private_rport_rd_enum_attr(port_state
, FC_PORTSTATE_MAX_NAMELEN
);
940 fc_private_rport_rd_attr(scsi_target_id
, "%d\n", 20);
943 * fast_io_fail_tmo attribute
946 show_fc_rport_fast_io_fail_tmo (struct device
*dev
,
947 struct device_attribute
*attr
, char *buf
)
949 struct fc_rport
*rport
= transport_class_to_rport(dev
);
951 if (rport
->fast_io_fail_tmo
== -1)
952 return snprintf(buf
, 5, "off\n");
953 return snprintf(buf
, 20, "%d\n", rport
->fast_io_fail_tmo
);
957 store_fc_rport_fast_io_fail_tmo(struct device
*dev
,
958 struct device_attribute
*attr
, const char *buf
,
963 struct fc_rport
*rport
= transport_class_to_rport(dev
);
965 if ((rport
->port_state
== FC_PORTSTATE_BLOCKED
) ||
966 (rport
->port_state
== FC_PORTSTATE_DELETED
) ||
967 (rport
->port_state
== FC_PORTSTATE_NOTPRESENT
))
969 if (strncmp(buf
, "off", 3) == 0)
970 rport
->fast_io_fail_tmo
= -1;
972 val
= simple_strtoul(buf
, &cp
, 0);
973 if ((*cp
&& (*cp
!= '\n')) || (val
< 0))
976 * Cap fast_io_fail by dev_loss_tmo or
977 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
979 if ((val
>= rport
->dev_loss_tmo
) ||
980 (val
> SCSI_DEVICE_BLOCK_MAX_TIMEOUT
))
983 rport
->fast_io_fail_tmo
= val
;
987 static FC_DEVICE_ATTR(rport
, fast_io_fail_tmo
, S_IRUGO
| S_IWUSR
,
988 show_fc_rport_fast_io_fail_tmo
, store_fc_rport_fast_io_fail_tmo
);
992 * FC SCSI Target Attribute Management
996 * Note: in the target show function we recognize when the remote
997 * port is in the hierarchy and do not allow the driver to get
998 * involved in sysfs functions. The driver only gets involved if
999 * it's the "old" style that doesn't use rports.
1001 #define fc_starget_show_function(field, format_string, sz, cast) \
1003 show_fc_starget_##field (struct device *dev, \
1004 struct device_attribute *attr, char *buf) \
1006 struct scsi_target *starget = transport_class_to_starget(dev); \
1007 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
1008 struct fc_internal *i = to_fc_internal(shost->transportt); \
1009 struct fc_rport *rport = starget_to_rport(starget); \
1011 fc_starget_##field(starget) = rport->field; \
1012 else if (i->f->get_starget_##field) \
1013 i->f->get_starget_##field(starget); \
1014 return snprintf(buf, sz, format_string, \
1015 cast fc_starget_##field(starget)); \
1018 #define fc_starget_rd_attr(field, format_string, sz) \
1019 fc_starget_show_function(field, format_string, sz, ) \
1020 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1021 show_fc_starget_##field, NULL)
1023 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
1024 fc_starget_show_function(field, format_string, sz, (cast)) \
1025 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1026 show_fc_starget_##field, NULL)
1028 #define SETUP_STARGET_ATTRIBUTE_RD(field) \
1029 i->private_starget_attrs[count] = device_attr_starget_##field; \
1030 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1031 i->private_starget_attrs[count].store = NULL; \
1032 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1033 if (i->f->show_starget_##field) \
1036 #define SETUP_STARGET_ATTRIBUTE_RW(field) \
1037 i->private_starget_attrs[count] = device_attr_starget_##field; \
1038 if (!i->f->set_starget_##field) { \
1039 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1040 i->private_starget_attrs[count].store = NULL; \
1042 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1043 if (i->f->show_starget_##field) \
1046 /* The FC Transport SCSI Target Attributes: */
1047 fc_starget_rd_attr_cast(node_name
, "0x%llx\n", 20, unsigned long long);
1048 fc_starget_rd_attr_cast(port_name
, "0x%llx\n", 20, unsigned long long);
1049 fc_starget_rd_attr(port_id
, "0x%06x\n", 20);
1053 * FC Virtual Port Attribute Management
1056 #define fc_vport_show_function(field, format_string, sz, cast) \
1058 show_fc_vport_##field (struct device *dev, \
1059 struct device_attribute *attr, char *buf) \
1061 struct fc_vport *vport = transport_class_to_vport(dev); \
1062 struct Scsi_Host *shost = vport_to_shost(vport); \
1063 struct fc_internal *i = to_fc_internal(shost->transportt); \
1064 if ((i->f->get_vport_##field) && \
1065 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1066 i->f->get_vport_##field(vport); \
1067 return snprintf(buf, sz, format_string, cast vport->field); \
1070 #define fc_vport_store_function(field) \
1072 store_fc_vport_##field(struct device *dev, \
1073 struct device_attribute *attr, \
1074 const char *buf, size_t count) \
1077 struct fc_vport *vport = transport_class_to_vport(dev); \
1078 struct Scsi_Host *shost = vport_to_shost(vport); \
1079 struct fc_internal *i = to_fc_internal(shost->transportt); \
1081 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1083 val = simple_strtoul(buf, &cp, 0); \
1084 if (*cp && (*cp != '\n')) \
1086 i->f->set_vport_##field(vport, val); \
1090 #define fc_vport_store_str_function(field, slen) \
1092 store_fc_vport_##field(struct device *dev, \
1093 struct device_attribute *attr, \
1094 const char *buf, size_t count) \
1096 struct fc_vport *vport = transport_class_to_vport(dev); \
1097 struct Scsi_Host *shost = vport_to_shost(vport); \
1098 struct fc_internal *i = to_fc_internal(shost->transportt); \
1099 unsigned int cnt=count; \
1101 /* count may include a LF at end of string */ \
1102 if (buf[cnt-1] == '\n') \
1104 if (cnt > ((slen) - 1)) \
1106 memcpy(vport->field, buf, cnt); \
1107 i->f->set_vport_##field(vport); \
1111 #define fc_vport_rd_attr(field, format_string, sz) \
1112 fc_vport_show_function(field, format_string, sz, ) \
1113 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1114 show_fc_vport_##field, NULL)
1116 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1117 fc_vport_show_function(field, format_string, sz, (cast)) \
1118 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1119 show_fc_vport_##field, NULL)
1121 #define fc_vport_rw_attr(field, format_string, sz) \
1122 fc_vport_show_function(field, format_string, sz, ) \
1123 fc_vport_store_function(field) \
1124 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1125 show_fc_vport_##field, \
1126 store_fc_vport_##field)
1128 #define fc_private_vport_show_function(field, format_string, sz, cast) \
1130 show_fc_vport_##field (struct device *dev, \
1131 struct device_attribute *attr, char *buf) \
1133 struct fc_vport *vport = transport_class_to_vport(dev); \
1134 return snprintf(buf, sz, format_string, cast vport->field); \
1137 #define fc_private_vport_store_u32_function(field) \
1139 store_fc_vport_##field(struct device *dev, \
1140 struct device_attribute *attr, \
1141 const char *buf, size_t count) \
1144 struct fc_vport *vport = transport_class_to_vport(dev); \
1146 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1148 val = simple_strtoul(buf, &cp, 0); \
1149 if (*cp && (*cp != '\n')) \
1151 vport->field = val; \
1156 #define fc_private_vport_rd_attr(field, format_string, sz) \
1157 fc_private_vport_show_function(field, format_string, sz, ) \
1158 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1159 show_fc_vport_##field, NULL)
1161 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1162 fc_private_vport_show_function(field, format_string, sz, (cast)) \
1163 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1164 show_fc_vport_##field, NULL)
1166 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1167 fc_private_vport_show_function(field, format_string, sz, ) \
1168 fc_private_vport_store_u32_function(field) \
1169 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1170 show_fc_vport_##field, \
1171 store_fc_vport_##field)
1174 #define fc_private_vport_rd_enum_attr(title, maxlen) \
1176 show_fc_vport_##title (struct device *dev, \
1177 struct device_attribute *attr, \
1180 struct fc_vport *vport = transport_class_to_vport(dev); \
1182 name = get_fc_##title##_name(vport->title); \
1185 return snprintf(buf, maxlen, "%s\n", name); \
1187 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
1188 show_fc_vport_##title, NULL)
1191 #define SETUP_VPORT_ATTRIBUTE_RD(field) \
1192 i->private_vport_attrs[count] = device_attr_vport_##field; \
1193 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1194 i->private_vport_attrs[count].store = NULL; \
1195 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1196 if (i->f->get_##field) \
1198 /* NOTE: Above MACRO differs: checks function not show bit */
1200 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
1201 i->private_vport_attrs[count] = device_attr_vport_##field; \
1202 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1203 i->private_vport_attrs[count].store = NULL; \
1204 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1207 #define SETUP_VPORT_ATTRIBUTE_WR(field) \
1208 i->private_vport_attrs[count] = device_attr_vport_##field; \
1209 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1212 /* NOTE: Above MACRO differs: checks function */
1214 #define SETUP_VPORT_ATTRIBUTE_RW(field) \
1215 i->private_vport_attrs[count] = device_attr_vport_##field; \
1216 if (!i->f->set_vport_##field) { \
1217 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1218 i->private_vport_attrs[count].store = NULL; \
1220 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1222 /* NOTE: Above MACRO differs: does not check show bit */
1224 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1226 i->private_vport_attrs[count] = device_attr_vport_##field; \
1227 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1232 /* The FC Transport Virtual Port Attributes: */
1234 /* Fixed Virtual Port Attributes */
1236 /* Dynamic Virtual Port Attributes */
1238 /* Private Virtual Port Attributes */
1240 fc_private_vport_rd_enum_attr(vport_state
, FC_VPORTSTATE_MAX_NAMELEN
);
1241 fc_private_vport_rd_enum_attr(vport_last_state
, FC_VPORTSTATE_MAX_NAMELEN
);
1242 fc_private_vport_rd_attr_cast(node_name
, "0x%llx\n", 20, unsigned long long);
1243 fc_private_vport_rd_attr_cast(port_name
, "0x%llx\n", 20, unsigned long long);
1246 show_fc_vport_roles (struct device
*dev
, struct device_attribute
*attr
,
1249 struct fc_vport
*vport
= transport_class_to_vport(dev
);
1251 if (vport
->roles
== FC_PORT_ROLE_UNKNOWN
)
1252 return snprintf(buf
, 20, "unknown\n");
1253 return get_fc_port_roles_names(vport
->roles
, buf
);
1255 static FC_DEVICE_ATTR(vport
, roles
, S_IRUGO
, show_fc_vport_roles
, NULL
);
1257 fc_private_vport_rd_enum_attr(vport_type
, FC_PORTTYPE_MAX_NAMELEN
);
1259 fc_private_vport_show_function(symbolic_name
, "%s\n",
1260 FC_VPORT_SYMBOLIC_NAMELEN
+ 1, )
1261 fc_vport_store_str_function(symbolic_name
, FC_VPORT_SYMBOLIC_NAMELEN
)
1262 static FC_DEVICE_ATTR(vport
, symbolic_name
, S_IRUGO
| S_IWUSR
,
1263 show_fc_vport_symbolic_name
, store_fc_vport_symbolic_name
);
1266 store_fc_vport_delete(struct device
*dev
, struct device_attribute
*attr
,
1267 const char *buf
, size_t count
)
1269 struct fc_vport
*vport
= transport_class_to_vport(dev
);
1270 struct Scsi_Host
*shost
= vport_to_shost(vport
);
1271 unsigned long flags
;
1273 spin_lock_irqsave(shost
->host_lock
, flags
);
1274 if (vport
->flags
& (FC_VPORT_DEL
| FC_VPORT_CREATING
)) {
1275 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1278 vport
->flags
|= FC_VPORT_DELETING
;
1279 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1281 fc_queue_work(shost
, &vport
->vport_delete_work
);
1284 static FC_DEVICE_ATTR(vport
, vport_delete
, S_IWUSR
,
1285 NULL
, store_fc_vport_delete
);
1289 * Enable/Disable vport
1290 * Write "1" to disable, write "0" to enable
1293 store_fc_vport_disable(struct device
*dev
, struct device_attribute
*attr
,
1297 struct fc_vport
*vport
= transport_class_to_vport(dev
);
1298 struct Scsi_Host
*shost
= vport_to_shost(vport
);
1299 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1302 if (vport
->flags
& (FC_VPORT_DEL
| FC_VPORT_CREATING
))
1306 if (vport
->vport_state
!= FC_VPORT_DISABLED
)
1308 } else if (*buf
== '1') {
1309 if (vport
->vport_state
== FC_VPORT_DISABLED
)
1314 stat
= i
->f
->vport_disable(vport
, ((*buf
== '0') ? false : true));
1315 return stat
? stat
: count
;
1317 static FC_DEVICE_ATTR(vport
, vport_disable
, S_IWUSR
,
1318 NULL
, store_fc_vport_disable
);
1322 * Host Attribute Management
1325 #define fc_host_show_function(field, format_string, sz, cast) \
1327 show_fc_host_##field (struct device *dev, \
1328 struct device_attribute *attr, char *buf) \
1330 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1331 struct fc_internal *i = to_fc_internal(shost->transportt); \
1332 if (i->f->get_host_##field) \
1333 i->f->get_host_##field(shost); \
1334 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1337 #define fc_host_store_function(field) \
1339 store_fc_host_##field(struct device *dev, \
1340 struct device_attribute *attr, \
1341 const char *buf, size_t count) \
1344 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1345 struct fc_internal *i = to_fc_internal(shost->transportt); \
1348 val = simple_strtoul(buf, &cp, 0); \
1349 if (*cp && (*cp != '\n')) \
1351 i->f->set_host_##field(shost, val); \
1355 #define fc_host_store_str_function(field, slen) \
1357 store_fc_host_##field(struct device *dev, \
1358 struct device_attribute *attr, \
1359 const char *buf, size_t count) \
1361 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1362 struct fc_internal *i = to_fc_internal(shost->transportt); \
1363 unsigned int cnt=count; \
1365 /* count may include a LF at end of string */ \
1366 if (buf[cnt-1] == '\n') \
1368 if (cnt > ((slen) - 1)) \
1370 memcpy(fc_host_##field(shost), buf, cnt); \
1371 i->f->set_host_##field(shost); \
1375 #define fc_host_rd_attr(field, format_string, sz) \
1376 fc_host_show_function(field, format_string, sz, ) \
1377 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1378 show_fc_host_##field, NULL)
1380 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1381 fc_host_show_function(field, format_string, sz, (cast)) \
1382 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1383 show_fc_host_##field, NULL)
1385 #define fc_host_rw_attr(field, format_string, sz) \
1386 fc_host_show_function(field, format_string, sz, ) \
1387 fc_host_store_function(field) \
1388 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1389 show_fc_host_##field, \
1390 store_fc_host_##field)
1392 #define fc_host_rd_enum_attr(title, maxlen) \
1394 show_fc_host_##title (struct device *dev, \
1395 struct device_attribute *attr, char *buf) \
1397 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1398 struct fc_internal *i = to_fc_internal(shost->transportt); \
1400 if (i->f->get_host_##title) \
1401 i->f->get_host_##title(shost); \
1402 name = get_fc_##title##_name(fc_host_##title(shost)); \
1405 return snprintf(buf, maxlen, "%s\n", name); \
1407 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1409 #define SETUP_HOST_ATTRIBUTE_RD(field) \
1410 i->private_host_attrs[count] = device_attr_host_##field; \
1411 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1412 i->private_host_attrs[count].store = NULL; \
1413 i->host_attrs[count] = &i->private_host_attrs[count]; \
1414 if (i->f->show_host_##field) \
1417 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
1418 i->private_host_attrs[count] = device_attr_host_##field; \
1419 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1420 i->private_host_attrs[count].store = NULL; \
1421 i->host_attrs[count] = &i->private_host_attrs[count]; \
1424 #define SETUP_HOST_ATTRIBUTE_RW(field) \
1425 i->private_host_attrs[count] = device_attr_host_##field; \
1426 if (!i->f->set_host_##field) { \
1427 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1428 i->private_host_attrs[count].store = NULL; \
1430 i->host_attrs[count] = &i->private_host_attrs[count]; \
1431 if (i->f->show_host_##field) \
1435 #define fc_private_host_show_function(field, format_string, sz, cast) \
1437 show_fc_host_##field (struct device *dev, \
1438 struct device_attribute *attr, char *buf) \
1440 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1441 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1444 #define fc_private_host_rd_attr(field, format_string, sz) \
1445 fc_private_host_show_function(field, format_string, sz, ) \
1446 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1447 show_fc_host_##field, NULL)
1449 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1450 fc_private_host_show_function(field, format_string, sz, (cast)) \
1451 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1452 show_fc_host_##field, NULL)
1454 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
1455 i->private_host_attrs[count] = device_attr_host_##field; \
1456 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1457 i->private_host_attrs[count].store = NULL; \
1458 i->host_attrs[count] = &i->private_host_attrs[count]; \
1461 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
1463 i->private_host_attrs[count] = device_attr_host_##field; \
1464 i->host_attrs[count] = &i->private_host_attrs[count]; \
1469 /* Fixed Host Attributes */
1472 show_fc_host_supported_classes (struct device
*dev
,
1473 struct device_attribute
*attr
, char *buf
)
1475 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1477 if (fc_host_supported_classes(shost
) == FC_COS_UNSPECIFIED
)
1478 return snprintf(buf
, 20, "unspecified\n");
1480 return get_fc_cos_names(fc_host_supported_classes(shost
), buf
);
1482 static FC_DEVICE_ATTR(host
, supported_classes
, S_IRUGO
,
1483 show_fc_host_supported_classes
, NULL
);
1486 show_fc_host_supported_fc4s (struct device
*dev
,
1487 struct device_attribute
*attr
, char *buf
)
1489 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1490 return (ssize_t
)show_fc_fc4s(buf
, fc_host_supported_fc4s(shost
));
1492 static FC_DEVICE_ATTR(host
, supported_fc4s
, S_IRUGO
,
1493 show_fc_host_supported_fc4s
, NULL
);
1496 show_fc_host_supported_speeds (struct device
*dev
,
1497 struct device_attribute
*attr
, char *buf
)
1499 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1501 if (fc_host_supported_speeds(shost
) == FC_PORTSPEED_UNKNOWN
)
1502 return snprintf(buf
, 20, "unknown\n");
1504 return get_fc_port_speed_names(fc_host_supported_speeds(shost
), buf
);
1506 static FC_DEVICE_ATTR(host
, supported_speeds
, S_IRUGO
,
1507 show_fc_host_supported_speeds
, NULL
);
1510 fc_private_host_rd_attr_cast(node_name
, "0x%llx\n", 20, unsigned long long);
1511 fc_private_host_rd_attr_cast(port_name
, "0x%llx\n", 20, unsigned long long);
1512 fc_private_host_rd_attr_cast(permanent_port_name
, "0x%llx\n", 20,
1513 unsigned long long);
1514 fc_private_host_rd_attr(maxframe_size
, "%u bytes\n", 20);
1515 fc_private_host_rd_attr(max_npiv_vports
, "%u\n", 20);
1516 fc_private_host_rd_attr(serial_number
, "%s\n", (FC_SERIAL_NUMBER_SIZE
+1));
1519 /* Dynamic Host Attributes */
1522 show_fc_host_active_fc4s (struct device
*dev
,
1523 struct device_attribute
*attr
, char *buf
)
1525 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1526 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1528 if (i
->f
->get_host_active_fc4s
)
1529 i
->f
->get_host_active_fc4s(shost
);
1531 return (ssize_t
)show_fc_fc4s(buf
, fc_host_active_fc4s(shost
));
1533 static FC_DEVICE_ATTR(host
, active_fc4s
, S_IRUGO
,
1534 show_fc_host_active_fc4s
, NULL
);
1537 show_fc_host_speed (struct device
*dev
,
1538 struct device_attribute
*attr
, char *buf
)
1540 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1541 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1543 if (i
->f
->get_host_speed
)
1544 i
->f
->get_host_speed(shost
);
1546 if (fc_host_speed(shost
) == FC_PORTSPEED_UNKNOWN
)
1547 return snprintf(buf
, 20, "unknown\n");
1549 return get_fc_port_speed_names(fc_host_speed(shost
), buf
);
1551 static FC_DEVICE_ATTR(host
, speed
, S_IRUGO
,
1552 show_fc_host_speed
, NULL
);
1555 fc_host_rd_attr(port_id
, "0x%06x\n", 20);
1556 fc_host_rd_enum_attr(port_type
, FC_PORTTYPE_MAX_NAMELEN
);
1557 fc_host_rd_enum_attr(port_state
, FC_PORTSTATE_MAX_NAMELEN
);
1558 fc_host_rd_attr_cast(fabric_name
, "0x%llx\n", 20, unsigned long long);
1559 fc_host_rd_attr(symbolic_name
, "%s\n", FC_SYMBOLIC_NAME_SIZE
+ 1);
1561 fc_private_host_show_function(system_hostname
, "%s\n",
1562 FC_SYMBOLIC_NAME_SIZE
+ 1, )
1563 fc_host_store_str_function(system_hostname
, FC_SYMBOLIC_NAME_SIZE
)
1564 static FC_DEVICE_ATTR(host
, system_hostname
, S_IRUGO
| S_IWUSR
,
1565 show_fc_host_system_hostname
, store_fc_host_system_hostname
);
1568 /* Private Host Attributes */
1571 show_fc_private_host_tgtid_bind_type(struct device
*dev
,
1572 struct device_attribute
*attr
, char *buf
)
1574 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1577 name
= get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost
));
1580 return snprintf(buf
, FC_BINDTYPE_MAX_NAMELEN
, "%s\n", name
);
1583 #define get_list_head_entry(pos, head, member) \
1584 pos = list_entry((head)->next, typeof(*pos), member)
1587 store_fc_private_host_tgtid_bind_type(struct device
*dev
,
1588 struct device_attribute
*attr
, const char *buf
, size_t count
)
1590 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1591 struct fc_rport
*rport
;
1592 enum fc_tgtid_binding_type val
;
1593 unsigned long flags
;
1595 if (get_fc_tgtid_bind_type_match(buf
, &val
))
1598 /* if changing bind type, purge all unused consistent bindings */
1599 if (val
!= fc_host_tgtid_bind_type(shost
)) {
1600 spin_lock_irqsave(shost
->host_lock
, flags
);
1601 while (!list_empty(&fc_host_rport_bindings(shost
))) {
1602 get_list_head_entry(rport
,
1603 &fc_host_rport_bindings(shost
), peers
);
1604 list_del(&rport
->peers
);
1605 rport
->port_state
= FC_PORTSTATE_DELETED
;
1606 fc_queue_work(shost
, &rport
->rport_delete_work
);
1608 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1611 fc_host_tgtid_bind_type(shost
) = val
;
1615 static FC_DEVICE_ATTR(host
, tgtid_bind_type
, S_IRUGO
| S_IWUSR
,
1616 show_fc_private_host_tgtid_bind_type
,
1617 store_fc_private_host_tgtid_bind_type
);
1620 store_fc_private_host_issue_lip(struct device
*dev
,
1621 struct device_attribute
*attr
, const char *buf
, size_t count
)
1623 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1624 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1627 /* ignore any data value written to the attribute */
1628 if (i
->f
->issue_fc_host_lip
) {
1629 ret
= i
->f
->issue_fc_host_lip(shost
);
1630 return ret
? ret
: count
;
1636 static FC_DEVICE_ATTR(host
, issue_lip
, S_IWUSR
, NULL
,
1637 store_fc_private_host_issue_lip
);
1640 store_fc_private_host_dev_loss_tmo(struct device
*dev
,
1641 struct device_attribute
*attr
,
1642 const char *buf
, size_t count
)
1644 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1645 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
1646 struct fc_rport
*rport
;
1647 unsigned long val
, flags
;
1650 rc
= fc_str_to_dev_loss(buf
, &val
);
1654 fc_host_dev_loss_tmo(shost
) = val
;
1655 spin_lock_irqsave(shost
->host_lock
, flags
);
1656 list_for_each_entry(rport
, &fc_host
->rports
, peers
)
1657 fc_rport_set_dev_loss_tmo(rport
, val
);
1658 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1662 fc_private_host_show_function(dev_loss_tmo
, "%d\n", 20, );
1663 static FC_DEVICE_ATTR(host
, dev_loss_tmo
, S_IRUGO
| S_IWUSR
,
1664 show_fc_host_dev_loss_tmo
,
1665 store_fc_private_host_dev_loss_tmo
);
1667 fc_private_host_rd_attr(npiv_vports_inuse
, "%u\n", 20);
1670 * Host Statistics Management
1673 /* Show a given an attribute in the statistics group */
1675 fc_stat_show(const struct device
*dev
, char *buf
, unsigned long offset
)
1677 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1678 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1679 struct fc_host_statistics
*stats
;
1680 ssize_t ret
= -ENOENT
;
1682 if (offset
> sizeof(struct fc_host_statistics
) ||
1683 offset
% sizeof(u64
) != 0)
1686 if (i
->f
->get_fc_host_stats
) {
1687 stats
= (i
->f
->get_fc_host_stats
)(shost
);
1689 ret
= snprintf(buf
, 20, "0x%llx\n",
1690 (unsigned long long)*(u64
*)(((u8
*) stats
) + offset
));
1696 /* generate a read-only statistics attribute */
1697 #define fc_host_statistic(name) \
1698 static ssize_t show_fcstat_##name(struct device *cd, \
1699 struct device_attribute *attr, \
1702 return fc_stat_show(cd, buf, \
1703 offsetof(struct fc_host_statistics, name)); \
1705 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1707 fc_host_statistic(seconds_since_last_reset
);
1708 fc_host_statistic(tx_frames
);
1709 fc_host_statistic(tx_words
);
1710 fc_host_statistic(rx_frames
);
1711 fc_host_statistic(rx_words
);
1712 fc_host_statistic(lip_count
);
1713 fc_host_statistic(nos_count
);
1714 fc_host_statistic(error_frames
);
1715 fc_host_statistic(dumped_frames
);
1716 fc_host_statistic(link_failure_count
);
1717 fc_host_statistic(loss_of_sync_count
);
1718 fc_host_statistic(loss_of_signal_count
);
1719 fc_host_statistic(prim_seq_protocol_err_count
);
1720 fc_host_statistic(invalid_tx_word_count
);
1721 fc_host_statistic(invalid_crc_count
);
1722 fc_host_statistic(fcp_input_requests
);
1723 fc_host_statistic(fcp_output_requests
);
1724 fc_host_statistic(fcp_control_requests
);
1725 fc_host_statistic(fcp_input_megabytes
);
1726 fc_host_statistic(fcp_output_megabytes
);
1729 fc_reset_statistics(struct device
*dev
, struct device_attribute
*attr
,
1730 const char *buf
, size_t count
)
1732 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1733 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1735 /* ignore any data value written to the attribute */
1736 if (i
->f
->reset_fc_host_stats
) {
1737 i
->f
->reset_fc_host_stats(shost
);
1743 static FC_DEVICE_ATTR(host
, reset_statistics
, S_IWUSR
, NULL
,
1744 fc_reset_statistics
);
1746 static struct attribute
*fc_statistics_attrs
[] = {
1747 &device_attr_host_seconds_since_last_reset
.attr
,
1748 &device_attr_host_tx_frames
.attr
,
1749 &device_attr_host_tx_words
.attr
,
1750 &device_attr_host_rx_frames
.attr
,
1751 &device_attr_host_rx_words
.attr
,
1752 &device_attr_host_lip_count
.attr
,
1753 &device_attr_host_nos_count
.attr
,
1754 &device_attr_host_error_frames
.attr
,
1755 &device_attr_host_dumped_frames
.attr
,
1756 &device_attr_host_link_failure_count
.attr
,
1757 &device_attr_host_loss_of_sync_count
.attr
,
1758 &device_attr_host_loss_of_signal_count
.attr
,
1759 &device_attr_host_prim_seq_protocol_err_count
.attr
,
1760 &device_attr_host_invalid_tx_word_count
.attr
,
1761 &device_attr_host_invalid_crc_count
.attr
,
1762 &device_attr_host_fcp_input_requests
.attr
,
1763 &device_attr_host_fcp_output_requests
.attr
,
1764 &device_attr_host_fcp_control_requests
.attr
,
1765 &device_attr_host_fcp_input_megabytes
.attr
,
1766 &device_attr_host_fcp_output_megabytes
.attr
,
1767 &device_attr_host_reset_statistics
.attr
,
1771 static struct attribute_group fc_statistics_group
= {
1772 .name
= "statistics",
1773 .attrs
= fc_statistics_attrs
,
1777 /* Host Vport Attributes */
1780 fc_parse_wwn(const char *ns
, u64
*nm
)
1785 memset(wwn
, 0, sizeof(wwn
));
1787 /* Validate and store the new name */
1788 for (i
=0, j
=0; i
< 16; i
++) {
1791 value
= hex_to_bin(*ns
++);
1793 j
= (j
<< 4) | value
;
1797 wwn
[i
/2] = j
& 0xff;
1802 *nm
= wwn_to_u64(wwn
);
1809 * "Short-cut" sysfs variable to create a new vport on a FC Host.
1810 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1811 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1812 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1815 store_fc_host_vport_create(struct device
*dev
, struct device_attribute
*attr
,
1816 const char *buf
, size_t count
)
1818 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1819 struct fc_vport_identifiers vid
;
1820 struct fc_vport
*vport
;
1821 unsigned int cnt
=count
;
1824 memset(&vid
, 0, sizeof(vid
));
1826 /* count may include a LF at end of string */
1827 if (buf
[cnt
-1] == '\n')
1830 /* validate we have enough characters for WWPN */
1831 if ((cnt
!= (16+1+16)) || (buf
[16] != ':'))
1834 stat
= fc_parse_wwn(&buf
[0], &vid
.port_name
);
1838 stat
= fc_parse_wwn(&buf
[17], &vid
.node_name
);
1842 vid
.roles
= FC_PORT_ROLE_FCP_INITIATOR
;
1843 vid
.vport_type
= FC_PORTTYPE_NPIV
;
1844 /* vid.symbolic_name is already zero/NULL's */
1845 vid
.disable
= false; /* always enabled */
1847 /* we only allow support on Channel 0 !!! */
1848 stat
= fc_vport_setup(shost
, 0, &shost
->shost_gendev
, &vid
, &vport
);
1849 return stat
? stat
: count
;
1851 static FC_DEVICE_ATTR(host
, vport_create
, S_IWUSR
, NULL
,
1852 store_fc_host_vport_create
);
1856 * "Short-cut" sysfs variable to delete a vport on a FC Host.
1857 * Vport is identified by a string containing "<WWPN>:<WWNN>".
1858 * The WWNs are specified as hex characters, and may *not* contain
1859 * any prefixes (e.g. 0x, x, etc)
1862 store_fc_host_vport_delete(struct device
*dev
, struct device_attribute
*attr
,
1863 const char *buf
, size_t count
)
1865 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1866 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
1867 struct fc_vport
*vport
;
1869 unsigned long flags
;
1870 unsigned int cnt
=count
;
1873 /* count may include a LF at end of string */
1874 if (buf
[cnt
-1] == '\n')
1877 /* validate we have enough characters for WWPN */
1878 if ((cnt
!= (16+1+16)) || (buf
[16] != ':'))
1881 stat
= fc_parse_wwn(&buf
[0], &wwpn
);
1885 stat
= fc_parse_wwn(&buf
[17], &wwnn
);
1889 spin_lock_irqsave(shost
->host_lock
, flags
);
1891 /* we only allow support on Channel 0 !!! */
1892 list_for_each_entry(vport
, &fc_host
->vports
, peers
) {
1893 if ((vport
->channel
== 0) &&
1894 (vport
->port_name
== wwpn
) && (vport
->node_name
== wwnn
)) {
1895 if (vport
->flags
& (FC_VPORT_DEL
| FC_VPORT_CREATING
))
1897 vport
->flags
|= FC_VPORT_DELETING
;
1902 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1907 stat
= fc_vport_terminate(vport
);
1908 return stat
? stat
: count
;
1910 static FC_DEVICE_ATTR(host
, vport_delete
, S_IWUSR
, NULL
,
1911 store_fc_host_vport_delete
);
1914 static int fc_host_match(struct attribute_container
*cont
,
1917 struct Scsi_Host
*shost
;
1918 struct fc_internal
*i
;
1920 if (!scsi_is_host_device(dev
))
1923 shost
= dev_to_shost(dev
);
1924 if (!shost
->transportt
|| shost
->transportt
->host_attrs
.ac
.class
1925 != &fc_host_class
.class)
1928 i
= to_fc_internal(shost
->transportt
);
1930 return &i
->t
.host_attrs
.ac
== cont
;
1933 static int fc_target_match(struct attribute_container
*cont
,
1936 struct Scsi_Host
*shost
;
1937 struct fc_internal
*i
;
1939 if (!scsi_is_target_device(dev
))
1942 shost
= dev_to_shost(dev
->parent
);
1943 if (!shost
->transportt
|| shost
->transportt
->host_attrs
.ac
.class
1944 != &fc_host_class
.class)
1947 i
= to_fc_internal(shost
->transportt
);
1949 return &i
->t
.target_attrs
.ac
== cont
;
1952 static void fc_rport_dev_release(struct device
*dev
)
1954 struct fc_rport
*rport
= dev_to_rport(dev
);
1955 put_device(dev
->parent
);
1959 int scsi_is_fc_rport(const struct device
*dev
)
1961 return dev
->release
== fc_rport_dev_release
;
1963 EXPORT_SYMBOL(scsi_is_fc_rport
);
1965 static int fc_rport_match(struct attribute_container
*cont
,
1968 struct Scsi_Host
*shost
;
1969 struct fc_internal
*i
;
1971 if (!scsi_is_fc_rport(dev
))
1974 shost
= dev_to_shost(dev
->parent
);
1975 if (!shost
->transportt
|| shost
->transportt
->host_attrs
.ac
.class
1976 != &fc_host_class
.class)
1979 i
= to_fc_internal(shost
->transportt
);
1981 return &i
->rport_attr_cont
.ac
== cont
;
1985 static void fc_vport_dev_release(struct device
*dev
)
1987 struct fc_vport
*vport
= dev_to_vport(dev
);
1988 put_device(dev
->parent
); /* release kobj parent */
1992 int scsi_is_fc_vport(const struct device
*dev
)
1994 return dev
->release
== fc_vport_dev_release
;
1996 EXPORT_SYMBOL(scsi_is_fc_vport
);
1998 static int fc_vport_match(struct attribute_container
*cont
,
2001 struct fc_vport
*vport
;
2002 struct Scsi_Host
*shost
;
2003 struct fc_internal
*i
;
2005 if (!scsi_is_fc_vport(dev
))
2007 vport
= dev_to_vport(dev
);
2009 shost
= vport_to_shost(vport
);
2010 if (!shost
->transportt
|| shost
->transportt
->host_attrs
.ac
.class
2011 != &fc_host_class
.class)
2014 i
= to_fc_internal(shost
->transportt
);
2015 return &i
->vport_attr_cont
.ac
== cont
;
2020 * fc_timed_out - FC Transport I/O timeout intercept handler
2021 * @scmd: The SCSI command which timed out
2023 * This routine protects against error handlers getting invoked while a
2024 * rport is in a blocked state, typically due to a temporarily loss of
2025 * connectivity. If the error handlers are allowed to proceed, requests
2026 * to abort i/o, reset the target, etc will likely fail as there is no way
2027 * to communicate with the device to perform the requested function. These
2028 * failures may result in the midlayer taking the device offline, requiring
2029 * manual intervention to restore operation.
2031 * This routine, called whenever an i/o times out, validates the state of
2032 * the underlying rport. If the rport is blocked, it returns
2033 * EH_RESET_TIMER, which will continue to reschedule the timeout.
2034 * Eventually, either the device will return, or devloss_tmo will fire,
2035 * and when the timeout then fires, it will be handled normally.
2036 * If the rport is not blocked, normal error handling continues.
2039 * This routine assumes no locks are held on entry.
2041 static enum blk_eh_timer_return
2042 fc_timed_out(struct scsi_cmnd
*scmd
)
2044 struct fc_rport
*rport
= starget_to_rport(scsi_target(scmd
->device
));
2046 if (rport
->port_state
== FC_PORTSTATE_BLOCKED
)
2047 return BLK_EH_RESET_TIMER
;
2049 return BLK_EH_NOT_HANDLED
;
2053 * Called by fc_user_scan to locate an rport on the shost that
2054 * matches the channel and target id, and invoke scsi_scan_target()
2058 fc_user_scan_tgt(struct Scsi_Host
*shost
, uint channel
, uint id
, uint lun
)
2060 struct fc_rport
*rport
;
2061 unsigned long flags
;
2063 spin_lock_irqsave(shost
->host_lock
, flags
);
2065 list_for_each_entry(rport
, &fc_host_rports(shost
), peers
) {
2066 if (rport
->scsi_target_id
== -1)
2069 if (rport
->port_state
!= FC_PORTSTATE_ONLINE
)
2072 if ((channel
== rport
->channel
) &&
2073 (id
== rport
->scsi_target_id
)) {
2074 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2075 scsi_scan_target(&rport
->dev
, channel
, id
, lun
, 1);
2080 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2084 * Called via sysfs scan routines. Necessary, as the FC transport
2085 * wants to place all target objects below the rport object. So this
2086 * routine must invoke the scsi_scan_target() routine with the rport
2087 * object as the parent.
2090 fc_user_scan(struct Scsi_Host
*shost
, uint channel
, uint id
, uint lun
)
2095 if (((channel
!= SCAN_WILD_CARD
) && (channel
> shost
->max_channel
)) ||
2096 ((id
!= SCAN_WILD_CARD
) && (id
>= shost
->max_id
)) ||
2097 ((lun
!= SCAN_WILD_CARD
) && (lun
> shost
->max_lun
)))
2100 if (channel
== SCAN_WILD_CARD
) {
2102 chhi
= shost
->max_channel
+ 1;
2108 if (id
== SCAN_WILD_CARD
) {
2110 tgthi
= shost
->max_id
;
2116 for ( ; chlo
< chhi
; chlo
++)
2117 for ( ; tgtlo
< tgthi
; tgtlo
++)
2118 fc_user_scan_tgt(shost
, chlo
, tgtlo
, lun
);
2123 static int fc_tsk_mgmt_response(struct Scsi_Host
*shost
, u64 nexus
, u64 tm_id
,
2126 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
2127 return i
->f
->tsk_mgmt_response(shost
, nexus
, tm_id
, result
);
2130 static int fc_it_nexus_response(struct Scsi_Host
*shost
, u64 nexus
, int result
)
2132 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
2133 return i
->f
->it_nexus_response(shost
, nexus
, result
);
2136 struct scsi_transport_template
*
2137 fc_attach_transport(struct fc_function_template
*ft
)
2140 struct fc_internal
*i
= kzalloc(sizeof(struct fc_internal
),
2146 i
->t
.target_attrs
.ac
.attrs
= &i
->starget_attrs
[0];
2147 i
->t
.target_attrs
.ac
.class = &fc_transport_class
.class;
2148 i
->t
.target_attrs
.ac
.match
= fc_target_match
;
2149 i
->t
.target_size
= sizeof(struct fc_starget_attrs
);
2150 transport_container_register(&i
->t
.target_attrs
);
2152 i
->t
.host_attrs
.ac
.attrs
= &i
->host_attrs
[0];
2153 i
->t
.host_attrs
.ac
.class = &fc_host_class
.class;
2154 i
->t
.host_attrs
.ac
.match
= fc_host_match
;
2155 i
->t
.host_size
= sizeof(struct fc_host_attrs
);
2156 if (ft
->get_fc_host_stats
)
2157 i
->t
.host_attrs
.statistics
= &fc_statistics_group
;
2158 transport_container_register(&i
->t
.host_attrs
);
2160 i
->rport_attr_cont
.ac
.attrs
= &i
->rport_attrs
[0];
2161 i
->rport_attr_cont
.ac
.class = &fc_rport_class
.class;
2162 i
->rport_attr_cont
.ac
.match
= fc_rport_match
;
2163 transport_container_register(&i
->rport_attr_cont
);
2165 i
->vport_attr_cont
.ac
.attrs
= &i
->vport_attrs
[0];
2166 i
->vport_attr_cont
.ac
.class = &fc_vport_class
.class;
2167 i
->vport_attr_cont
.ac
.match
= fc_vport_match
;
2168 transport_container_register(&i
->vport_attr_cont
);
2172 /* Transport uses the shost workq for scsi scanning */
2173 i
->t
.create_work_queue
= 1;
2175 i
->t
.eh_timed_out
= fc_timed_out
;
2177 i
->t
.user_scan
= fc_user_scan
;
2179 /* target-mode drivers' functions */
2180 i
->t
.tsk_mgmt_response
= fc_tsk_mgmt_response
;
2181 i
->t
.it_nexus_response
= fc_it_nexus_response
;
2184 * Setup SCSI Target Attributes.
2187 SETUP_STARGET_ATTRIBUTE_RD(node_name
);
2188 SETUP_STARGET_ATTRIBUTE_RD(port_name
);
2189 SETUP_STARGET_ATTRIBUTE_RD(port_id
);
2191 BUG_ON(count
> FC_STARGET_NUM_ATTRS
);
2193 i
->starget_attrs
[count
] = NULL
;
2197 * Setup SCSI Host Attributes.
2200 SETUP_HOST_ATTRIBUTE_RD(node_name
);
2201 SETUP_HOST_ATTRIBUTE_RD(port_name
);
2202 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name
);
2203 SETUP_HOST_ATTRIBUTE_RD(supported_classes
);
2204 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s
);
2205 SETUP_HOST_ATTRIBUTE_RD(supported_speeds
);
2206 SETUP_HOST_ATTRIBUTE_RD(maxframe_size
);
2207 if (ft
->vport_create
) {
2208 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports
);
2209 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse
);
2211 SETUP_HOST_ATTRIBUTE_RD(serial_number
);
2213 SETUP_HOST_ATTRIBUTE_RD(port_id
);
2214 SETUP_HOST_ATTRIBUTE_RD(port_type
);
2215 SETUP_HOST_ATTRIBUTE_RD(port_state
);
2216 SETUP_HOST_ATTRIBUTE_RD(active_fc4s
);
2217 SETUP_HOST_ATTRIBUTE_RD(speed
);
2218 SETUP_HOST_ATTRIBUTE_RD(fabric_name
);
2219 SETUP_HOST_ATTRIBUTE_RD(symbolic_name
);
2220 SETUP_HOST_ATTRIBUTE_RW(system_hostname
);
2222 /* Transport-managed attributes */
2223 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo
);
2224 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type
);
2225 if (ft
->issue_fc_host_lip
)
2226 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip
);
2227 if (ft
->vport_create
)
2228 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create
);
2229 if (ft
->vport_delete
)
2230 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete
);
2232 BUG_ON(count
> FC_HOST_NUM_ATTRS
);
2234 i
->host_attrs
[count
] = NULL
;
2237 * Setup Remote Port Attributes.
2240 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size
);
2241 SETUP_RPORT_ATTRIBUTE_RD(supported_classes
);
2242 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo
);
2243 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name
);
2244 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name
);
2245 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id
);
2246 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles
);
2247 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state
);
2248 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id
);
2249 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo
);
2251 BUG_ON(count
> FC_RPORT_NUM_ATTRS
);
2253 i
->rport_attrs
[count
] = NULL
;
2256 * Setup Virtual Port Attributes.
2259 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state
);
2260 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state
);
2261 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name
);
2262 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name
);
2263 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles
);
2264 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type
);
2265 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name
);
2266 SETUP_VPORT_ATTRIBUTE_WR(vport_delete
);
2267 SETUP_VPORT_ATTRIBUTE_WR(vport_disable
);
2269 BUG_ON(count
> FC_VPORT_NUM_ATTRS
);
2271 i
->vport_attrs
[count
] = NULL
;
2275 EXPORT_SYMBOL(fc_attach_transport
);
2277 void fc_release_transport(struct scsi_transport_template
*t
)
2279 struct fc_internal
*i
= to_fc_internal(t
);
2281 transport_container_unregister(&i
->t
.target_attrs
);
2282 transport_container_unregister(&i
->t
.host_attrs
);
2283 transport_container_unregister(&i
->rport_attr_cont
);
2284 transport_container_unregister(&i
->vport_attr_cont
);
2288 EXPORT_SYMBOL(fc_release_transport
);
2291 * fc_queue_work - Queue work to the fc_host workqueue.
2292 * @shost: Pointer to Scsi_Host bound to fc_host.
2293 * @work: Work to queue for execution.
2296 * 1 - work queued for execution
2297 * 0 - work is already queued
2298 * -EINVAL - work queue doesn't exist
2301 fc_queue_work(struct Scsi_Host
*shost
, struct work_struct
*work
)
2303 if (unlikely(!fc_host_work_q(shost
))) {
2305 "ERROR: FC host '%s' attempted to queue work, "
2306 "when no workqueue created.\n", shost
->hostt
->name
);
2312 return queue_work(fc_host_work_q(shost
), work
);
2316 * fc_flush_work - Flush a fc_host's workqueue.
2317 * @shost: Pointer to Scsi_Host bound to fc_host.
2320 fc_flush_work(struct Scsi_Host
*shost
)
2322 if (!fc_host_work_q(shost
)) {
2324 "ERROR: FC host '%s' attempted to flush work, "
2325 "when no workqueue created.\n", shost
->hostt
->name
);
2330 flush_workqueue(fc_host_work_q(shost
));
2334 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2335 * @shost: Pointer to Scsi_Host bound to fc_host.
2336 * @work: Work to queue for execution.
2337 * @delay: jiffies to delay the work queuing
2340 * 1 on success / 0 already queued / < 0 for error
2343 fc_queue_devloss_work(struct Scsi_Host
*shost
, struct delayed_work
*work
,
2344 unsigned long delay
)
2346 if (unlikely(!fc_host_devloss_work_q(shost
))) {
2348 "ERROR: FC host '%s' attempted to queue work, "
2349 "when no workqueue created.\n", shost
->hostt
->name
);
2355 return queue_delayed_work(fc_host_devloss_work_q(shost
), work
, delay
);
2359 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2360 * @shost: Pointer to Scsi_Host bound to fc_host.
2363 fc_flush_devloss(struct Scsi_Host
*shost
)
2365 if (!fc_host_devloss_work_q(shost
)) {
2367 "ERROR: FC host '%s' attempted to flush work, "
2368 "when no workqueue created.\n", shost
->hostt
->name
);
2373 flush_workqueue(fc_host_devloss_work_q(shost
));
2378 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2379 * @shost: Which &Scsi_Host
2381 * This routine is expected to be called immediately preceeding the
2382 * a driver's call to scsi_remove_host().
2384 * WARNING: A driver utilizing the fc_transport, which fails to call
2385 * this routine prior to scsi_remove_host(), will leave dangling
2386 * objects in /sys/class/fc_remote_ports. Access to any of these
2387 * objects can result in a system crash !!!
2390 * This routine assumes no locks are held on entry.
2393 fc_remove_host(struct Scsi_Host
*shost
)
2395 struct fc_vport
*vport
= NULL
, *next_vport
= NULL
;
2396 struct fc_rport
*rport
= NULL
, *next_rport
= NULL
;
2397 struct workqueue_struct
*work_q
;
2398 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
2399 unsigned long flags
;
2401 spin_lock_irqsave(shost
->host_lock
, flags
);
2403 /* Remove any vports */
2404 list_for_each_entry_safe(vport
, next_vport
, &fc_host
->vports
, peers
)
2405 fc_queue_work(shost
, &vport
->vport_delete_work
);
2407 /* Remove any remote ports */
2408 list_for_each_entry_safe(rport
, next_rport
,
2409 &fc_host
->rports
, peers
) {
2410 list_del(&rport
->peers
);
2411 rport
->port_state
= FC_PORTSTATE_DELETED
;
2412 fc_queue_work(shost
, &rport
->rport_delete_work
);
2415 list_for_each_entry_safe(rport
, next_rport
,
2416 &fc_host
->rport_bindings
, peers
) {
2417 list_del(&rport
->peers
);
2418 rport
->port_state
= FC_PORTSTATE_DELETED
;
2419 fc_queue_work(shost
, &rport
->rport_delete_work
);
2422 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2424 /* flush all scan work items */
2425 scsi_flush_work(shost
);
2427 /* flush all stgt delete, and rport delete work items, then kill it */
2428 if (fc_host
->work_q
) {
2429 work_q
= fc_host
->work_q
;
2430 fc_host
->work_q
= NULL
;
2431 destroy_workqueue(work_q
);
2434 /* flush all devloss work items, then kill it */
2435 if (fc_host
->devloss_work_q
) {
2436 work_q
= fc_host
->devloss_work_q
;
2437 fc_host
->devloss_work_q
= NULL
;
2438 destroy_workqueue(work_q
);
2441 EXPORT_SYMBOL(fc_remove_host
);
2443 static void fc_terminate_rport_io(struct fc_rport
*rport
)
2445 struct Scsi_Host
*shost
= rport_to_shost(rport
);
2446 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
2448 /* Involve the LLDD if possible to terminate all io on the rport. */
2449 if (i
->f
->terminate_rport_io
)
2450 i
->f
->terminate_rport_io(rport
);
2453 * must unblock to flush queued IO. The caller will have set
2454 * the port_state or flags, so that fc_remote_port_chkready will
2457 scsi_target_unblock(&rport
->dev
);
2461 * fc_starget_delete - called to delete the scsi decendents of an rport
2462 * @work: remote port to be operated on.
2464 * Deletes target and all sdevs.
2467 fc_starget_delete(struct work_struct
*work
)
2469 struct fc_rport
*rport
=
2470 container_of(work
, struct fc_rport
, stgt_delete_work
);
2472 fc_terminate_rport_io(rport
);
2473 scsi_remove_target(&rport
->dev
);
2478 * fc_rport_final_delete - finish rport termination and delete it.
2479 * @work: remote port to be deleted.
2482 fc_rport_final_delete(struct work_struct
*work
)
2484 struct fc_rport
*rport
=
2485 container_of(work
, struct fc_rport
, rport_delete_work
);
2486 struct device
*dev
= &rport
->dev
;
2487 struct Scsi_Host
*shost
= rport_to_shost(rport
);
2488 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
2489 unsigned long flags
;
2490 int do_callback
= 0;
2493 * if a scan is pending, flush the SCSI Host work_q so that
2494 * that we can reclaim the rport scan work element.
2496 if (rport
->flags
& FC_RPORT_SCAN_PENDING
)
2497 scsi_flush_work(shost
);
2499 fc_terminate_rport_io(rport
);
2502 * Cancel any outstanding timers. These should really exist
2503 * only when rmmod'ing the LLDD and we're asking for
2504 * immediate termination of the rports
2506 spin_lock_irqsave(shost
->host_lock
, flags
);
2507 if (rport
->flags
& FC_RPORT_DEVLOSS_PENDING
) {
2508 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2509 if (!cancel_delayed_work(&rport
->fail_io_work
))
2510 fc_flush_devloss(shost
);
2511 if (!cancel_delayed_work(&rport
->dev_loss_work
))
2512 fc_flush_devloss(shost
);
2513 spin_lock_irqsave(shost
->host_lock
, flags
);
2514 rport
->flags
&= ~FC_RPORT_DEVLOSS_PENDING
;
2516 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2518 /* Delete SCSI target and sdevs */
2519 if (rport
->scsi_target_id
!= -1)
2520 fc_starget_delete(&rport
->stgt_delete_work
);
2523 * Notify the driver that the rport is now dead. The LLDD will
2524 * also guarantee that any communication to the rport is terminated
2526 * Avoid this call if we already called it when we preserved the
2527 * rport for the binding.
2529 spin_lock_irqsave(shost
->host_lock
, flags
);
2530 if (!(rport
->flags
& FC_RPORT_DEVLOSS_CALLBK_DONE
) &&
2531 (i
->f
->dev_loss_tmo_callbk
)) {
2532 rport
->flags
|= FC_RPORT_DEVLOSS_CALLBK_DONE
;
2535 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2538 i
->f
->dev_loss_tmo_callbk(rport
);
2540 fc_bsg_remove(rport
->rqst_q
);
2542 transport_remove_device(dev
);
2544 transport_destroy_device(dev
);
2545 put_device(&shost
->shost_gendev
); /* for fc_host->rport list */
2546 put_device(dev
); /* for self-reference */
2551 * fc_rport_create - allocates and creates a remote FC port.
2552 * @shost: scsi host the remote port is connected to.
2553 * @channel: Channel on shost port connected to.
2554 * @ids: The world wide names, fc address, and FC4 port
2555 * roles for the remote port.
2557 * Allocates and creates the remoter port structure, including the
2558 * class and sysfs creation.
2561 * This routine assumes no locks are held on entry.
2563 static struct fc_rport
*
2564 fc_rport_create(struct Scsi_Host
*shost
, int channel
,
2565 struct fc_rport_identifiers
*ids
)
2567 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
2568 struct fc_internal
*fci
= to_fc_internal(shost
->transportt
);
2569 struct fc_rport
*rport
;
2571 unsigned long flags
;
2575 size
= (sizeof(struct fc_rport
) + fci
->f
->dd_fcrport_size
);
2576 rport
= kzalloc(size
, GFP_KERNEL
);
2577 if (unlikely(!rport
)) {
2578 printk(KERN_ERR
"%s: allocation failure\n", __func__
);
2582 rport
->maxframe_size
= -1;
2583 rport
->supported_classes
= FC_COS_UNSPECIFIED
;
2584 rport
->dev_loss_tmo
= fc_host
->dev_loss_tmo
;
2585 memcpy(&rport
->node_name
, &ids
->node_name
, sizeof(rport
->node_name
));
2586 memcpy(&rport
->port_name
, &ids
->port_name
, sizeof(rport
->port_name
));
2587 rport
->port_id
= ids
->port_id
;
2588 rport
->roles
= ids
->roles
;
2589 rport
->port_state
= FC_PORTSTATE_ONLINE
;
2590 if (fci
->f
->dd_fcrport_size
)
2591 rport
->dd_data
= &rport
[1];
2592 rport
->channel
= channel
;
2593 rport
->fast_io_fail_tmo
= -1;
2595 INIT_DELAYED_WORK(&rport
->dev_loss_work
, fc_timeout_deleted_rport
);
2596 INIT_DELAYED_WORK(&rport
->fail_io_work
, fc_timeout_fail_rport_io
);
2597 INIT_WORK(&rport
->scan_work
, fc_scsi_scan_rport
);
2598 INIT_WORK(&rport
->stgt_delete_work
, fc_starget_delete
);
2599 INIT_WORK(&rport
->rport_delete_work
, fc_rport_final_delete
);
2601 spin_lock_irqsave(shost
->host_lock
, flags
);
2603 rport
->number
= fc_host
->next_rport_number
++;
2604 if (rport
->roles
& FC_PORT_ROLE_FCP_TARGET
)
2605 rport
->scsi_target_id
= fc_host
->next_target_id
++;
2607 rport
->scsi_target_id
= -1;
2608 list_add_tail(&rport
->peers
, &fc_host
->rports
);
2609 get_device(&shost
->shost_gendev
); /* for fc_host->rport list */
2611 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2614 device_initialize(dev
); /* takes self reference */
2615 dev
->parent
= get_device(&shost
->shost_gendev
); /* parent reference */
2616 dev
->release
= fc_rport_dev_release
;
2617 dev_set_name(dev
, "rport-%d:%d-%d",
2618 shost
->host_no
, channel
, rport
->number
);
2619 transport_setup_device(dev
);
2621 error
= device_add(dev
);
2623 printk(KERN_ERR
"FC Remote Port device_add failed\n");
2626 transport_add_device(dev
);
2627 transport_configure_device(dev
);
2629 fc_bsg_rportadd(shost
, rport
);
2630 /* ignore any bsg add error - we just can't do sgio */
2632 if (rport
->roles
& FC_PORT_ROLE_FCP_TARGET
) {
2633 /* initiate a scan of the target */
2634 rport
->flags
|= FC_RPORT_SCAN_PENDING
;
2635 scsi_queue_work(shost
, &rport
->scan_work
);
2641 transport_destroy_device(dev
);
2642 spin_lock_irqsave(shost
->host_lock
, flags
);
2643 list_del(&rport
->peers
);
2644 put_device(&shost
->shost_gendev
); /* for fc_host->rport list */
2645 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2646 put_device(dev
->parent
);
2652 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
2653 * @shost: scsi host the remote port is connected to.
2654 * @channel: Channel on shost port connected to.
2655 * @ids: The world wide names, fc address, and FC4 port
2656 * roles for the remote port.
2658 * The LLDD calls this routine to notify the transport of the existence
2659 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2660 * of the port, it's FC address (port_id), and the FC4 roles that are
2661 * active for the port.
2663 * For ports that are FCP targets (aka scsi targets), the FC transport
2664 * maintains consistent target id bindings on behalf of the LLDD.
2665 * A consistent target id binding is an assignment of a target id to
2666 * a remote port identifier, which persists while the scsi host is
2667 * attached. The remote port can disappear, then later reappear, and
2668 * it's target id assignment remains the same. This allows for shifts
2669 * in FC addressing (if binding by wwpn or wwnn) with no apparent
2670 * changes to the scsi subsystem which is based on scsi host number and
2671 * target id values. Bindings are only valid during the attachment of
2672 * the scsi host. If the host detaches, then later re-attaches, target
2673 * id bindings may change.
2675 * This routine is responsible for returning a remote port structure.
2676 * The routine will search the list of remote ports it maintains
2677 * internally on behalf of consistent target id mappings. If found, the
2678 * remote port structure will be reused. Otherwise, a new remote port
2679 * structure will be allocated.
2681 * Whenever a remote port is allocated, a new fc_remote_port class
2682 * device is created.
2684 * Should not be called from interrupt context.
2687 * This routine assumes no locks are held on entry.
2690 fc_remote_port_add(struct Scsi_Host
*shost
, int channel
,
2691 struct fc_rport_identifiers
*ids
)
2693 struct fc_internal
*fci
= to_fc_internal(shost
->transportt
);
2694 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
2695 struct fc_rport
*rport
;
2696 unsigned long flags
;
2699 /* ensure any stgt delete functions are done */
2700 fc_flush_work(shost
);
2703 * Search the list of "active" rports, for an rport that has been
2704 * deleted, but we've held off the real delete while the target
2705 * is in a "blocked" state.
2707 spin_lock_irqsave(shost
->host_lock
, flags
);
2709 list_for_each_entry(rport
, &fc_host
->rports
, peers
) {
2711 if ((rport
->port_state
== FC_PORTSTATE_BLOCKED
) &&
2712 (rport
->channel
== channel
)) {
2714 switch (fc_host
->tgtid_bind_type
) {
2715 case FC_TGTID_BIND_BY_WWPN
:
2716 case FC_TGTID_BIND_NONE
:
2717 if (rport
->port_name
== ids
->port_name
)
2720 case FC_TGTID_BIND_BY_WWNN
:
2721 if (rport
->node_name
== ids
->node_name
)
2724 case FC_TGTID_BIND_BY_ID
:
2725 if (rport
->port_id
== ids
->port_id
)
2732 memcpy(&rport
->node_name
, &ids
->node_name
,
2733 sizeof(rport
->node_name
));
2734 memcpy(&rport
->port_name
, &ids
->port_name
,
2735 sizeof(rport
->port_name
));
2736 rport
->port_id
= ids
->port_id
;
2738 rport
->port_state
= FC_PORTSTATE_ONLINE
;
2739 rport
->roles
= ids
->roles
;
2741 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2743 if (fci
->f
->dd_fcrport_size
)
2744 memset(rport
->dd_data
, 0,
2745 fci
->f
->dd_fcrport_size
);
2748 * If we were not a target, cancel the
2749 * io terminate and rport timers, and
2752 * If we were a target, but our new role
2753 * doesn't indicate a target, leave the
2754 * timers running expecting the role to
2755 * change as the target fully logs in. If
2756 * it doesn't, the target will be torn down.
2758 * If we were a target, and our role shows
2759 * we're still a target, cancel the timers
2760 * and kick off a scan.
2763 /* was a target, not in roles */
2764 if ((rport
->scsi_target_id
!= -1) &&
2765 (!(ids
->roles
& FC_PORT_ROLE_FCP_TARGET
)))
2769 * Stop the fail io and dev_loss timers.
2770 * If they flush, the port_state will
2771 * be checked and will NOOP the function.
2773 if (!cancel_delayed_work(&rport
->fail_io_work
))
2774 fc_flush_devloss(shost
);
2775 if (!cancel_delayed_work(&rport
->dev_loss_work
))
2776 fc_flush_devloss(shost
);
2778 spin_lock_irqsave(shost
->host_lock
, flags
);
2780 rport
->flags
&= ~(FC_RPORT_FAST_FAIL_TIMEDOUT
|
2781 FC_RPORT_DEVLOSS_PENDING
|
2782 FC_RPORT_DEVLOSS_CALLBK_DONE
);
2784 /* if target, initiate a scan */
2785 if (rport
->scsi_target_id
!= -1) {
2786 rport
->flags
|= FC_RPORT_SCAN_PENDING
;
2787 scsi_queue_work(shost
,
2789 spin_unlock_irqrestore(shost
->host_lock
,
2791 scsi_target_unblock(&rport
->dev
);
2793 spin_unlock_irqrestore(shost
->host_lock
,
2796 fc_bsg_goose_queue(rport
);
2804 * Search the bindings array
2805 * Note: if never a FCP target, you won't be on this list
2807 if (fc_host
->tgtid_bind_type
!= FC_TGTID_BIND_NONE
) {
2809 /* search for a matching consistent binding */
2811 list_for_each_entry(rport
, &fc_host
->rport_bindings
,
2813 if (rport
->channel
!= channel
)
2816 switch (fc_host
->tgtid_bind_type
) {
2817 case FC_TGTID_BIND_BY_WWPN
:
2818 if (rport
->port_name
== ids
->port_name
)
2821 case FC_TGTID_BIND_BY_WWNN
:
2822 if (rport
->node_name
== ids
->node_name
)
2825 case FC_TGTID_BIND_BY_ID
:
2826 if (rport
->port_id
== ids
->port_id
)
2829 case FC_TGTID_BIND_NONE
: /* to keep compiler happy */
2834 list_move_tail(&rport
->peers
, &fc_host
->rports
);
2840 memcpy(&rport
->node_name
, &ids
->node_name
,
2841 sizeof(rport
->node_name
));
2842 memcpy(&rport
->port_name
, &ids
->port_name
,
2843 sizeof(rport
->port_name
));
2844 rport
->port_id
= ids
->port_id
;
2845 rport
->roles
= ids
->roles
;
2846 rport
->port_state
= FC_PORTSTATE_ONLINE
;
2847 rport
->flags
&= ~FC_RPORT_FAST_FAIL_TIMEDOUT
;
2849 if (fci
->f
->dd_fcrport_size
)
2850 memset(rport
->dd_data
, 0,
2851 fci
->f
->dd_fcrport_size
);
2853 if (rport
->roles
& FC_PORT_ROLE_FCP_TARGET
) {
2854 /* initiate a scan of the target */
2855 rport
->flags
|= FC_RPORT_SCAN_PENDING
;
2856 scsi_queue_work(shost
, &rport
->scan_work
);
2857 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2858 scsi_target_unblock(&rport
->dev
);
2860 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2866 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2868 /* No consistent binding found - create new remote port entry */
2869 rport
= fc_rport_create(shost
, channel
, ids
);
2873 EXPORT_SYMBOL(fc_remote_port_add
);
2877 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
2878 * @rport: The remote port that no longer exists
2880 * The LLDD calls this routine to notify the transport that a remote
2881 * port is no longer part of the topology. Note: Although a port
2882 * may no longer be part of the topology, it may persist in the remote
2883 * ports displayed by the fc_host. We do this under 2 conditions:
2884 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
2885 * This allows the port to temporarily disappear, then reappear without
2886 * disrupting the SCSI device tree attached to it. During the "blocked"
2887 * period the port will still exist.
2888 * 2) If the port was a scsi target and disappears for longer than we
2889 * expect, we'll delete the port and the tear down the SCSI device tree
2890 * attached to it. However, we want to semi-persist the target id assigned
2891 * to that port if it eventually does exist. The port structure will
2892 * remain (although with minimal information) so that the target id
2895 * If the remote port is not an FCP Target, it will be fully torn down
2896 * and deallocated, including the fc_remote_port class device.
2898 * If the remote port is an FCP Target, the port will be placed in a
2899 * temporary blocked state. From the LLDD's perspective, the rport no
2900 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2901 * exists, but all sdevs on it are blocked from further I/O. The following
2904 * If the remote port does not return (signaled by a LLDD call to
2905 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2906 * scsi target is removed - killing all outstanding i/o and removing the
2907 * scsi devices attached ot it. The port structure will be marked Not
2908 * Present and be partially cleared, leaving only enough information to
2909 * recognize the remote port relative to the scsi target id binding if
2910 * it later appears. The port will remain as long as there is a valid
2911 * binding (e.g. until the user changes the binding type or unloads the
2912 * scsi host with the binding).
2914 * If the remote port returns within the dev_loss_tmo value (and matches
2915 * according to the target id binding type), the port structure will be
2916 * reused. If it is no longer a SCSI target, the target will be torn
2917 * down. If it continues to be a SCSI target, then the target will be
2918 * unblocked (allowing i/o to be resumed), and a scan will be activated
2919 * to ensure that all luns are detected.
2921 * Called from normal process context only - cannot be called from interrupt.
2924 * This routine assumes no locks are held on entry.
2927 fc_remote_port_delete(struct fc_rport
*rport
)
2929 struct Scsi_Host
*shost
= rport_to_shost(rport
);
2930 unsigned long timeout
= rport
->dev_loss_tmo
;
2931 unsigned long flags
;
2934 * No need to flush the fc_host work_q's, as all adds are synchronous.
2936 * We do need to reclaim the rport scan work element, so eventually
2937 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2938 * there's still a scan pending.
2941 spin_lock_irqsave(shost
->host_lock
, flags
);
2943 if (rport
->port_state
!= FC_PORTSTATE_ONLINE
) {
2944 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2949 * In the past, we if this was not an FCP-Target, we would
2950 * unconditionally just jump to deleting the rport.
2951 * However, rports can be used as node containers by the LLDD,
2952 * and its not appropriate to just terminate the rport at the
2953 * first sign of a loss in connectivity. The LLDD may want to
2954 * send ELS traffic to re-validate the login. If the rport is
2955 * immediately deleted, it makes it inappropriate for a node
2957 * So... we now unconditionally wait dev_loss_tmo before
2958 * destroying an rport.
2961 rport
->port_state
= FC_PORTSTATE_BLOCKED
;
2963 rport
->flags
|= FC_RPORT_DEVLOSS_PENDING
;
2965 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2967 if (rport
->roles
& FC_PORT_ROLE_FCP_INITIATOR
&&
2968 shost
->active_mode
& MODE_TARGET
)
2969 fc_tgt_it_nexus_destroy(shost
, (unsigned long)rport
);
2971 scsi_target_block(&rport
->dev
);
2973 /* see if we need to kill io faster than waiting for device loss */
2974 if ((rport
->fast_io_fail_tmo
!= -1) &&
2975 (rport
->fast_io_fail_tmo
< timeout
))
2976 fc_queue_devloss_work(shost
, &rport
->fail_io_work
,
2977 rport
->fast_io_fail_tmo
* HZ
);
2979 /* cap the length the devices can be blocked until they are deleted */
2980 fc_queue_devloss_work(shost
, &rport
->dev_loss_work
, timeout
* HZ
);
2982 EXPORT_SYMBOL(fc_remote_port_delete
);
2985 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
2986 * @rport: The remote port that changed.
2987 * @roles: New roles for this port.
2989 * Description: The LLDD calls this routine to notify the transport that the
2990 * roles on a remote port may have changed. The largest effect of this is
2991 * if a port now becomes a FCP Target, it must be allocated a
2992 * scsi target id. If the port is no longer a FCP target, any
2993 * scsi target id value assigned to it will persist in case the
2994 * role changes back to include FCP Target. No changes in the scsi
2995 * midlayer will be invoked if the role changes (in the expectation
2996 * that the role will be resumed. If it doesn't normal error processing
2999 * Should not be called from interrupt context.
3002 * This routine assumes no locks are held on entry.
3005 fc_remote_port_rolechg(struct fc_rport
*rport
, u32 roles
)
3007 struct Scsi_Host
*shost
= rport_to_shost(rport
);
3008 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
3009 unsigned long flags
;
3013 spin_lock_irqsave(shost
->host_lock
, flags
);
3014 if (roles
& FC_PORT_ROLE_FCP_TARGET
) {
3015 if (rport
->scsi_target_id
== -1) {
3016 rport
->scsi_target_id
= fc_host
->next_target_id
++;
3018 } else if (!(rport
->roles
& FC_PORT_ROLE_FCP_TARGET
))
3020 } else if (shost
->active_mode
& MODE_TARGET
) {
3021 ret
= fc_tgt_it_nexus_create(shost
, (unsigned long)rport
,
3022 (char *)&rport
->node_name
);
3024 printk(KERN_ERR
"FC Remore Port tgt nexus failed %d\n",
3028 rport
->roles
= roles
;
3030 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3034 * There may have been a delete timer running on the
3035 * port. Ensure that it is cancelled as we now know
3036 * the port is an FCP Target.
3037 * Note: we know the rport is exists and in an online
3038 * state as the LLDD would not have had an rport
3039 * reference to pass us.
3041 * Take no action on the del_timer failure as the state
3042 * machine state change will validate the
3045 if (!cancel_delayed_work(&rport
->fail_io_work
))
3046 fc_flush_devloss(shost
);
3047 if (!cancel_delayed_work(&rport
->dev_loss_work
))
3048 fc_flush_devloss(shost
);
3050 spin_lock_irqsave(shost
->host_lock
, flags
);
3051 rport
->flags
&= ~(FC_RPORT_FAST_FAIL_TIMEDOUT
|
3052 FC_RPORT_DEVLOSS_PENDING
);
3053 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3055 /* ensure any stgt delete functions are done */
3056 fc_flush_work(shost
);
3058 /* initiate a scan of the target */
3059 spin_lock_irqsave(shost
->host_lock
, flags
);
3060 rport
->flags
|= FC_RPORT_SCAN_PENDING
;
3061 scsi_queue_work(shost
, &rport
->scan_work
);
3062 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3063 scsi_target_unblock(&rport
->dev
);
3066 EXPORT_SYMBOL(fc_remote_port_rolechg
);
3069 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3070 * @work: rport target that failed to reappear in the allotted time.
3072 * Description: An attempt to delete a remote port blocks, and if it fails
3073 * to return in the allotted time this gets called.
3076 fc_timeout_deleted_rport(struct work_struct
*work
)
3078 struct fc_rport
*rport
=
3079 container_of(work
, struct fc_rport
, dev_loss_work
.work
);
3080 struct Scsi_Host
*shost
= rport_to_shost(rport
);
3081 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3082 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
3083 unsigned long flags
;
3084 int do_callback
= 0;
3086 spin_lock_irqsave(shost
->host_lock
, flags
);
3088 rport
->flags
&= ~FC_RPORT_DEVLOSS_PENDING
;
3091 * If the port is ONLINE, then it came back. If it was a SCSI
3092 * target, validate it still is. If not, tear down the
3093 * scsi_target on it.
3095 if ((rport
->port_state
== FC_PORTSTATE_ONLINE
) &&
3096 (rport
->scsi_target_id
!= -1) &&
3097 !(rport
->roles
& FC_PORT_ROLE_FCP_TARGET
)) {
3098 dev_printk(KERN_ERR
, &rport
->dev
,
3099 "blocked FC remote port time out: no longer"
3100 " a FCP target, removing starget\n");
3101 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3102 scsi_target_unblock(&rport
->dev
);
3103 fc_queue_work(shost
, &rport
->stgt_delete_work
);
3107 /* NOOP state - we're flushing workq's */
3108 if (rport
->port_state
!= FC_PORTSTATE_BLOCKED
) {
3109 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3110 dev_printk(KERN_ERR
, &rport
->dev
,
3111 "blocked FC remote port time out: leaving"
3113 (rport
->scsi_target_id
!= -1) ? " and starget" : "");
3117 if ((fc_host
->tgtid_bind_type
== FC_TGTID_BIND_NONE
) ||
3118 (rport
->scsi_target_id
== -1)) {
3119 list_del(&rport
->peers
);
3120 rport
->port_state
= FC_PORTSTATE_DELETED
;
3121 dev_printk(KERN_ERR
, &rport
->dev
,
3122 "blocked FC remote port time out: removing"
3124 (rport
->scsi_target_id
!= -1) ? " and starget" : "");
3125 fc_queue_work(shost
, &rport
->rport_delete_work
);
3126 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3130 dev_printk(KERN_ERR
, &rport
->dev
,
3131 "blocked FC remote port time out: removing target and "
3132 "saving binding\n");
3134 list_move_tail(&rport
->peers
, &fc_host
->rport_bindings
);
3137 * Note: We do not remove or clear the hostdata area. This allows
3138 * host-specific target data to persist along with the
3139 * scsi_target_id. It's up to the host to manage it's hostdata area.
3143 * Reinitialize port attributes that may change if the port comes back.
3145 rport
->maxframe_size
= -1;
3146 rport
->supported_classes
= FC_COS_UNSPECIFIED
;
3147 rport
->roles
= FC_PORT_ROLE_UNKNOWN
;
3148 rport
->port_state
= FC_PORTSTATE_NOTPRESENT
;
3149 rport
->flags
&= ~FC_RPORT_FAST_FAIL_TIMEDOUT
;
3152 * Pre-emptively kill I/O rather than waiting for the work queue
3153 * item to teardown the starget. (FCOE libFC folks prefer this
3154 * and to have the rport_port_id still set when it's done).
3156 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3157 fc_terminate_rport_io(rport
);
3159 spin_lock_irqsave(shost
->host_lock
, flags
);
3161 if (rport
->port_state
== FC_PORTSTATE_NOTPRESENT
) { /* still missing */
3163 /* remove the identifiers that aren't used in the consisting binding */
3164 switch (fc_host
->tgtid_bind_type
) {
3165 case FC_TGTID_BIND_BY_WWPN
:
3166 rport
->node_name
= -1;
3167 rport
->port_id
= -1;
3169 case FC_TGTID_BIND_BY_WWNN
:
3170 rport
->port_name
= -1;
3171 rport
->port_id
= -1;
3173 case FC_TGTID_BIND_BY_ID
:
3174 rport
->node_name
= -1;
3175 rport
->port_name
= -1;
3177 case FC_TGTID_BIND_NONE
: /* to keep compiler happy */
3182 * As this only occurs if the remote port (scsi target)
3183 * went away and didn't come back - we'll remove
3184 * all attached scsi devices.
3186 rport
->flags
|= FC_RPORT_DEVLOSS_CALLBK_DONE
;
3187 fc_queue_work(shost
, &rport
->stgt_delete_work
);
3192 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3195 * Notify the driver that the rport is now dead. The LLDD will
3196 * also guarantee that any communication to the rport is terminated
3198 * Note: we set the CALLBK_DONE flag above to correspond
3200 if (do_callback
&& i
->f
->dev_loss_tmo_callbk
)
3201 i
->f
->dev_loss_tmo_callbk(rport
);
3206 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3207 * @work: rport to terminate io on.
3209 * Notes: Only requests the failure of the io, not that all are flushed
3210 * prior to returning.
3213 fc_timeout_fail_rport_io(struct work_struct
*work
)
3215 struct fc_rport
*rport
=
3216 container_of(work
, struct fc_rport
, fail_io_work
.work
);
3218 if (rport
->port_state
!= FC_PORTSTATE_BLOCKED
)
3221 rport
->flags
|= FC_RPORT_FAST_FAIL_TIMEDOUT
;
3222 fc_terminate_rport_io(rport
);
3226 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3227 * @work: remote port to be scanned.
3230 fc_scsi_scan_rport(struct work_struct
*work
)
3232 struct fc_rport
*rport
=
3233 container_of(work
, struct fc_rport
, scan_work
);
3234 struct Scsi_Host
*shost
= rport_to_shost(rport
);
3235 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3236 unsigned long flags
;
3238 if ((rport
->port_state
== FC_PORTSTATE_ONLINE
) &&
3239 (rport
->roles
& FC_PORT_ROLE_FCP_TARGET
) &&
3240 !(i
->f
->disable_target_scan
)) {
3241 scsi_scan_target(&rport
->dev
, rport
->channel
,
3242 rport
->scsi_target_id
, SCAN_WILD_CARD
, 1);
3245 spin_lock_irqsave(shost
->host_lock
, flags
);
3246 rport
->flags
&= ~FC_RPORT_SCAN_PENDING
;
3247 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3251 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3252 * @cmnd: SCSI command that scsi_eh is trying to recover
3254 * This routine can be called from a FC LLD scsi_eh callback. It
3255 * blocks the scsi_eh thread until the fc_rport leaves the
3256 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3257 * necessary to avoid the scsi_eh failing recovery actions for blocked
3258 * rports which would lead to offlined SCSI devices.
3260 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3261 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3262 * passed back to scsi_eh.
3264 int fc_block_scsi_eh(struct scsi_cmnd
*cmnd
)
3266 struct Scsi_Host
*shost
= cmnd
->device
->host
;
3267 struct fc_rport
*rport
= starget_to_rport(scsi_target(cmnd
->device
));
3268 unsigned long flags
;
3270 spin_lock_irqsave(shost
->host_lock
, flags
);
3271 while (rport
->port_state
== FC_PORTSTATE_BLOCKED
&&
3272 !(rport
->flags
& FC_RPORT_FAST_FAIL_TIMEDOUT
)) {
3273 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3275 spin_lock_irqsave(shost
->host_lock
, flags
);
3277 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3279 if (rport
->flags
& FC_RPORT_FAST_FAIL_TIMEDOUT
)
3280 return FAST_IO_FAIL
;
3284 EXPORT_SYMBOL(fc_block_scsi_eh
);
3287 * fc_vport_setup - allocates and creates a FC virtual port.
3288 * @shost: scsi host the virtual port is connected to.
3289 * @channel: Channel on shost port connected to.
3290 * @pdev: parent device for vport
3291 * @ids: The world wide names, FC4 port roles, etc for
3293 * @ret_vport: The pointer to the created vport.
3295 * Allocates and creates the vport structure, calls the parent host
3296 * to instantiate the vport, the completes w/ class and sysfs creation.
3299 * This routine assumes no locks are held on entry.
3302 fc_vport_setup(struct Scsi_Host
*shost
, int channel
, struct device
*pdev
,
3303 struct fc_vport_identifiers
*ids
, struct fc_vport
**ret_vport
)
3305 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
3306 struct fc_internal
*fci
= to_fc_internal(shost
->transportt
);
3307 struct fc_vport
*vport
;
3309 unsigned long flags
;
3315 if ( ! fci
->f
->vport_create
)
3318 size
= (sizeof(struct fc_vport
) + fci
->f
->dd_fcvport_size
);
3319 vport
= kzalloc(size
, GFP_KERNEL
);
3320 if (unlikely(!vport
)) {
3321 printk(KERN_ERR
"%s: allocation failure\n", __func__
);
3325 vport
->vport_state
= FC_VPORT_UNKNOWN
;
3326 vport
->vport_last_state
= FC_VPORT_UNKNOWN
;
3327 vport
->node_name
= ids
->node_name
;
3328 vport
->port_name
= ids
->port_name
;
3329 vport
->roles
= ids
->roles
;
3330 vport
->vport_type
= ids
->vport_type
;
3331 if (fci
->f
->dd_fcvport_size
)
3332 vport
->dd_data
= &vport
[1];
3333 vport
->shost
= shost
;
3334 vport
->channel
= channel
;
3335 vport
->flags
= FC_VPORT_CREATING
;
3336 INIT_WORK(&vport
->vport_delete_work
, fc_vport_sched_delete
);
3338 spin_lock_irqsave(shost
->host_lock
, flags
);
3340 if (fc_host
->npiv_vports_inuse
>= fc_host
->max_npiv_vports
) {
3341 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3345 fc_host
->npiv_vports_inuse
++;
3346 vport
->number
= fc_host
->next_vport_number
++;
3347 list_add_tail(&vport
->peers
, &fc_host
->vports
);
3348 get_device(&shost
->shost_gendev
); /* for fc_host->vport list */
3350 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3353 device_initialize(dev
); /* takes self reference */
3354 dev
->parent
= get_device(pdev
); /* takes parent reference */
3355 dev
->release
= fc_vport_dev_release
;
3356 dev_set_name(dev
, "vport-%d:%d-%d",
3357 shost
->host_no
, channel
, vport
->number
);
3358 transport_setup_device(dev
);
3360 error
= device_add(dev
);
3362 printk(KERN_ERR
"FC Virtual Port device_add failed\n");
3365 transport_add_device(dev
);
3366 transport_configure_device(dev
);
3368 error
= fci
->f
->vport_create(vport
, ids
->disable
);
3370 printk(KERN_ERR
"FC Virtual Port LLDD Create failed\n");
3371 goto delete_vport_all
;
3375 * if the parent isn't the physical adapter's Scsi_Host, ensure
3376 * the Scsi_Host at least contains ia symlink to the vport.
3378 if (pdev
!= &shost
->shost_gendev
) {
3379 error
= sysfs_create_link(&shost
->shost_gendev
.kobj
,
3380 &dev
->kobj
, dev_name(dev
));
3383 "%s: Cannot create vport symlinks for "
3385 __func__
, dev_name(dev
), error
);
3387 spin_lock_irqsave(shost
->host_lock
, flags
);
3388 vport
->flags
&= ~FC_VPORT_CREATING
;
3389 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3391 dev_printk(KERN_NOTICE
, pdev
,
3392 "%s created via shost%d channel %d\n", dev_name(dev
),
3393 shost
->host_no
, channel
);
3400 transport_remove_device(dev
);
3403 transport_destroy_device(dev
);
3404 spin_lock_irqsave(shost
->host_lock
, flags
);
3405 list_del(&vport
->peers
);
3406 put_device(&shost
->shost_gendev
); /* for fc_host->vport list */
3407 fc_host
->npiv_vports_inuse
--;
3408 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3409 put_device(dev
->parent
);
3416 * fc_vport_create - Admin App or LLDD requests creation of a vport
3417 * @shost: scsi host the virtual port is connected to.
3418 * @channel: channel on shost port connected to.
3419 * @ids: The world wide names, FC4 port roles, etc for
3423 * This routine assumes no locks are held on entry.
3426 fc_vport_create(struct Scsi_Host
*shost
, int channel
,
3427 struct fc_vport_identifiers
*ids
)
3430 struct fc_vport
*vport
;
3432 stat
= fc_vport_setup(shost
, channel
, &shost
->shost_gendev
,
3434 return stat
? NULL
: vport
;
3436 EXPORT_SYMBOL(fc_vport_create
);
3439 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3440 * @vport: fc_vport to be terminated
3442 * Calls the LLDD vport_delete() function, then deallocates and removes
3443 * the vport from the shost and object tree.
3446 * This routine assumes no locks are held on entry.
3449 fc_vport_terminate(struct fc_vport
*vport
)
3451 struct Scsi_Host
*shost
= vport_to_shost(vport
);
3452 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
3453 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3454 struct device
*dev
= &vport
->dev
;
3455 unsigned long flags
;
3458 if (i
->f
->vport_delete
)
3459 stat
= i
->f
->vport_delete(vport
);
3463 spin_lock_irqsave(shost
->host_lock
, flags
);
3464 vport
->flags
&= ~FC_VPORT_DELETING
;
3466 vport
->flags
|= FC_VPORT_DELETED
;
3467 list_del(&vport
->peers
);
3468 fc_host
->npiv_vports_inuse
--;
3469 put_device(&shost
->shost_gendev
); /* for fc_host->vport list */
3471 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3476 if (dev
->parent
!= &shost
->shost_gendev
)
3477 sysfs_remove_link(&shost
->shost_gendev
.kobj
, dev_name(dev
));
3478 transport_remove_device(dev
);
3480 transport_destroy_device(dev
);
3483 * Removing our self-reference should mean our
3484 * release function gets called, which will drop the remaining
3485 * parent reference and free the data structure.
3487 put_device(dev
); /* for self-reference */
3489 return 0; /* SUCCESS */
3491 EXPORT_SYMBOL(fc_vport_terminate
);
3494 * fc_vport_sched_delete - workq-based delete request for a vport
3495 * @work: vport to be deleted.
3498 fc_vport_sched_delete(struct work_struct
*work
)
3500 struct fc_vport
*vport
=
3501 container_of(work
, struct fc_vport
, vport_delete_work
);
3504 stat
= fc_vport_terminate(vport
);
3506 dev_printk(KERN_ERR
, vport
->dev
.parent
,
3507 "%s: %s could not be deleted created via "
3508 "shost%d channel %d - error %d\n", __func__
,
3509 dev_name(&vport
->dev
), vport
->shost
->host_no
,
3510 vport
->channel
, stat
);
3520 * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job
3521 * @job: fc_bsg_job that is to be torn down
3524 fc_destroy_bsgjob(struct fc_bsg_job
*job
)
3526 unsigned long flags
;
3528 spin_lock_irqsave(&job
->job_lock
, flags
);
3530 spin_unlock_irqrestore(&job
->job_lock
, flags
);
3533 spin_unlock_irqrestore(&job
->job_lock
, flags
);
3535 put_device(job
->dev
); /* release reference for the request */
3537 kfree(job
->request_payload
.sg_list
);
3538 kfree(job
->reply_payload
.sg_list
);
3543 * fc_bsg_jobdone - completion routine for bsg requests that the LLD has
3545 * @job: fc_bsg_job that is complete
3548 fc_bsg_jobdone(struct fc_bsg_job
*job
)
3550 struct request
*req
= job
->req
;
3551 struct request
*rsp
= req
->next_rq
;
3554 err
= job
->req
->errors
= job
->reply
->result
;
3557 /* we're only returning the result field in the reply */
3558 job
->req
->sense_len
= sizeof(uint32_t);
3560 job
->req
->sense_len
= job
->reply_len
;
3562 /* we assume all request payload was transferred, residual == 0 */
3566 WARN_ON(job
->reply
->reply_payload_rcv_len
> rsp
->resid_len
);
3568 /* set reply (bidi) residual */
3569 rsp
->resid_len
-= min(job
->reply
->reply_payload_rcv_len
,
3572 blk_complete_request(req
);
3576 * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests
3577 * @rq: BSG request that holds the job to be destroyed
3579 static void fc_bsg_softirq_done(struct request
*rq
)
3581 struct fc_bsg_job
*job
= rq
->special
;
3582 unsigned long flags
;
3584 spin_lock_irqsave(&job
->job_lock
, flags
);
3585 job
->state_flags
|= FC_RQST_STATE_DONE
;
3587 spin_unlock_irqrestore(&job
->job_lock
, flags
);
3589 blk_end_request_all(rq
, rq
->errors
);
3590 fc_destroy_bsgjob(job
);
3594 * fc_bsg_job_timeout - handler for when a bsg request timesout
3595 * @req: request that timed out
3597 static enum blk_eh_timer_return
3598 fc_bsg_job_timeout(struct request
*req
)
3600 struct fc_bsg_job
*job
= (void *) req
->special
;
3601 struct Scsi_Host
*shost
= job
->shost
;
3602 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3603 unsigned long flags
;
3604 int err
= 0, done
= 0;
3606 if (job
->rport
&& job
->rport
->port_state
== FC_PORTSTATE_BLOCKED
)
3607 return BLK_EH_RESET_TIMER
;
3609 spin_lock_irqsave(&job
->job_lock
, flags
);
3610 if (job
->state_flags
& FC_RQST_STATE_DONE
)
3614 spin_unlock_irqrestore(&job
->job_lock
, flags
);
3616 if (!done
&& i
->f
->bsg_timeout
) {
3617 /* call LLDD to abort the i/o as it has timed out */
3618 err
= i
->f
->bsg_timeout(job
);
3619 if (err
== -EAGAIN
) {
3621 return BLK_EH_RESET_TIMER
;
3623 printk(KERN_ERR
"ERROR: FC BSG request timeout - LLD "
3624 "abort failed with status %d\n", err
);
3627 /* the blk_end_sync_io() doesn't check the error */
3629 return BLK_EH_NOT_HANDLED
;
3631 return BLK_EH_HANDLED
;
3635 fc_bsg_map_buffer(struct fc_bsg_buffer
*buf
, struct request
*req
)
3637 size_t sz
= (sizeof(struct scatterlist
) * req
->nr_phys_segments
);
3639 BUG_ON(!req
->nr_phys_segments
);
3641 buf
->sg_list
= kzalloc(sz
, GFP_KERNEL
);
3644 sg_init_table(buf
->sg_list
, req
->nr_phys_segments
);
3645 buf
->sg_cnt
= blk_rq_map_sg(req
->q
, req
, buf
->sg_list
);
3646 buf
->payload_len
= blk_rq_bytes(req
);
3652 * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the
3654 * @shost: SCSI Host corresponding to the bsg object
3655 * @rport: (optional) FC Remote Port corresponding to the bsg object
3656 * @req: BSG request that needs a job structure
3659 fc_req_to_bsgjob(struct Scsi_Host
*shost
, struct fc_rport
*rport
,
3660 struct request
*req
)
3662 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3663 struct request
*rsp
= req
->next_rq
;
3664 struct fc_bsg_job
*job
;
3667 BUG_ON(req
->special
);
3669 job
= kzalloc(sizeof(struct fc_bsg_job
) + i
->f
->dd_bsg_size
,
3675 * Note: this is a bit silly.
3676 * The request gets formatted as a SGIO v4 ioctl request, which
3677 * then gets reformatted as a blk request, which then gets
3678 * reformatted as a fc bsg request. And on completion, we have
3679 * to wrap return results such that SGIO v4 thinks it was a scsi
3680 * status. I hope this was all worth it.
3687 if (i
->f
->dd_bsg_size
)
3688 job
->dd_data
= (void *)&job
[1];
3689 spin_lock_init(&job
->job_lock
);
3690 job
->request
= (struct fc_bsg_request
*)req
->cmd
;
3691 job
->request_len
= req
->cmd_len
;
3692 job
->reply
= req
->sense
;
3693 job
->reply_len
= SCSI_SENSE_BUFFERSIZE
; /* Size of sense buffer
3696 ret
= fc_bsg_map_buffer(&job
->request_payload
, req
);
3698 goto failjob_rls_job
;
3700 if (rsp
&& rsp
->bio
) {
3701 ret
= fc_bsg_map_buffer(&job
->reply_payload
, rsp
);
3703 goto failjob_rls_rqst_payload
;
3705 job
->job_done
= fc_bsg_jobdone
;
3707 job
->dev
= &rport
->dev
;
3709 job
->dev
= &shost
->shost_gendev
;
3710 get_device(job
->dev
); /* take a reference for the request */
3717 failjob_rls_rqst_payload
:
3718 kfree(job
->request_payload
.sg_list
);
3725 enum fc_dispatch_result
{
3726 FC_DISPATCH_BREAK
, /* on return, q is locked, break from q loop */
3727 FC_DISPATCH_LOCKED
, /* on return, q is locked, continue on */
3728 FC_DISPATCH_UNLOCKED
, /* on return, q is unlocked, continue on */
3733 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
3734 * @q: fc host request queue
3735 * @shost: scsi host rport attached to
3736 * @job: bsg job to be processed
3738 static enum fc_dispatch_result
3739 fc_bsg_host_dispatch(struct request_queue
*q
, struct Scsi_Host
*shost
,
3740 struct fc_bsg_job
*job
)
3742 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3743 int cmdlen
= sizeof(uint32_t); /* start with length of msgcode */
3746 /* Validate the host command */
3747 switch (job
->request
->msgcode
) {
3748 case FC_BSG_HST_ADD_RPORT
:
3749 cmdlen
+= sizeof(struct fc_bsg_host_add_rport
);
3752 case FC_BSG_HST_DEL_RPORT
:
3753 cmdlen
+= sizeof(struct fc_bsg_host_del_rport
);
3756 case FC_BSG_HST_ELS_NOLOGIN
:
3757 cmdlen
+= sizeof(struct fc_bsg_host_els
);
3758 /* there better be a xmt and rcv payloads */
3759 if ((!job
->request_payload
.payload_len
) ||
3760 (!job
->reply_payload
.payload_len
)) {
3767 cmdlen
+= sizeof(struct fc_bsg_host_ct
);
3768 /* there better be xmt and rcv payloads */
3769 if ((!job
->request_payload
.payload_len
) ||
3770 (!job
->reply_payload
.payload_len
)) {
3776 case FC_BSG_HST_VENDOR
:
3777 cmdlen
+= sizeof(struct fc_bsg_host_vendor
);
3778 if ((shost
->hostt
->vendor_id
== 0L) ||
3779 (job
->request
->rqst_data
.h_vendor
.vendor_id
!=
3780 shost
->hostt
->vendor_id
)) {
3791 /* check if we really have all the request data needed */
3792 if (job
->request_len
< cmdlen
) {
3797 ret
= i
->f
->bsg_request(job
);
3799 return FC_DISPATCH_UNLOCKED
;
3802 /* return the errno failure code as the only status */
3803 BUG_ON(job
->reply_len
< sizeof(uint32_t));
3804 job
->reply
->reply_payload_rcv_len
= 0;
3805 job
->reply
->result
= ret
;
3806 job
->reply_len
= sizeof(uint32_t);
3807 fc_bsg_jobdone(job
);
3808 return FC_DISPATCH_UNLOCKED
;
3813 * fc_bsg_goose_queue - restart rport queue in case it was stopped
3814 * @rport: rport to be restarted
3817 fc_bsg_goose_queue(struct fc_rport
*rport
)
3820 unsigned long flags
;
3825 get_device(&rport
->dev
);
3827 spin_lock_irqsave(rport
->rqst_q
->queue_lock
, flags
);
3828 flagset
= test_bit(QUEUE_FLAG_REENTER
, &rport
->rqst_q
->queue_flags
) &&
3829 !test_bit(QUEUE_FLAG_REENTER
, &rport
->rqst_q
->queue_flags
);
3831 queue_flag_set(QUEUE_FLAG_REENTER
, rport
->rqst_q
);
3832 __blk_run_queue(rport
->rqst_q
, false);
3834 queue_flag_clear(QUEUE_FLAG_REENTER
, rport
->rqst_q
);
3835 spin_unlock_irqrestore(rport
->rqst_q
->queue_lock
, flags
);
3837 put_device(&rport
->dev
);
3842 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
3843 * @q: rport request queue
3844 * @shost: scsi host rport attached to
3845 * @rport: rport request destined to
3846 * @job: bsg job to be processed
3848 static enum fc_dispatch_result
3849 fc_bsg_rport_dispatch(struct request_queue
*q
, struct Scsi_Host
*shost
,
3850 struct fc_rport
*rport
, struct fc_bsg_job
*job
)
3852 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3853 int cmdlen
= sizeof(uint32_t); /* start with length of msgcode */
3856 /* Validate the rport command */
3857 switch (job
->request
->msgcode
) {
3858 case FC_BSG_RPT_ELS
:
3859 cmdlen
+= sizeof(struct fc_bsg_rport_els
);
3863 cmdlen
+= sizeof(struct fc_bsg_rport_ct
);
3865 /* there better be xmt and rcv payloads */
3866 if ((!job
->request_payload
.payload_len
) ||
3867 (!job
->reply_payload
.payload_len
)) {
3869 goto fail_rport_msg
;
3874 goto fail_rport_msg
;
3877 /* check if we really have all the request data needed */
3878 if (job
->request_len
< cmdlen
) {
3880 goto fail_rport_msg
;
3883 ret
= i
->f
->bsg_request(job
);
3885 return FC_DISPATCH_UNLOCKED
;
3888 /* return the errno failure code as the only status */
3889 BUG_ON(job
->reply_len
< sizeof(uint32_t));
3890 job
->reply
->reply_payload_rcv_len
= 0;
3891 job
->reply
->result
= ret
;
3892 job
->reply_len
= sizeof(uint32_t);
3893 fc_bsg_jobdone(job
);
3894 return FC_DISPATCH_UNLOCKED
;
3899 * fc_bsg_request_handler - generic handler for bsg requests
3900 * @q: request queue to manage
3901 * @shost: Scsi_Host related to the bsg object
3902 * @rport: FC remote port related to the bsg object (optional)
3903 * @dev: device structure for bsg object
3906 fc_bsg_request_handler(struct request_queue
*q
, struct Scsi_Host
*shost
,
3907 struct fc_rport
*rport
, struct device
*dev
)
3909 struct request
*req
;
3910 struct fc_bsg_job
*job
;
3911 enum fc_dispatch_result ret
;
3913 if (!get_device(dev
))
3916 while (!blk_queue_plugged(q
)) {
3917 if (rport
&& (rport
->port_state
== FC_PORTSTATE_BLOCKED
) &&
3918 !(rport
->flags
& FC_RPORT_FAST_FAIL_TIMEDOUT
))
3921 req
= blk_fetch_request(q
);
3925 if (rport
&& (rport
->port_state
!= FC_PORTSTATE_ONLINE
)) {
3926 req
->errors
= -ENXIO
;
3927 spin_unlock_irq(q
->queue_lock
);
3928 blk_end_request_all(req
, -ENXIO
);
3929 spin_lock_irq(q
->queue_lock
);
3933 spin_unlock_irq(q
->queue_lock
);
3935 ret
= fc_req_to_bsgjob(shost
, rport
, req
);
3938 blk_end_request_all(req
, ret
);
3939 spin_lock_irq(q
->queue_lock
);
3945 /* check if we have the msgcode value at least */
3946 if (job
->request_len
< sizeof(uint32_t)) {
3947 BUG_ON(job
->reply_len
< sizeof(uint32_t));
3948 job
->reply
->reply_payload_rcv_len
= 0;
3949 job
->reply
->result
= -ENOMSG
;
3950 job
->reply_len
= sizeof(uint32_t);
3951 fc_bsg_jobdone(job
);
3952 spin_lock_irq(q
->queue_lock
);
3956 /* the dispatch routines will unlock the queue_lock */
3958 ret
= fc_bsg_rport_dispatch(q
, shost
, rport
, job
);
3960 ret
= fc_bsg_host_dispatch(q
, shost
, job
);
3962 /* did dispatcher hit state that can't process any more */
3963 if (ret
== FC_DISPATCH_BREAK
)
3966 /* did dispatcher had released the lock */
3967 if (ret
== FC_DISPATCH_UNLOCKED
)
3968 spin_lock_irq(q
->queue_lock
);
3971 spin_unlock_irq(q
->queue_lock
);
3973 spin_lock_irq(q
->queue_lock
);
3978 * fc_bsg_host_handler - handler for bsg requests for a fc host
3979 * @q: fc host request queue
3982 fc_bsg_host_handler(struct request_queue
*q
)
3984 struct Scsi_Host
*shost
= q
->queuedata
;
3986 fc_bsg_request_handler(q
, shost
, NULL
, &shost
->shost_gendev
);
3991 * fc_bsg_rport_handler - handler for bsg requests for a fc rport
3992 * @q: rport request queue
3995 fc_bsg_rport_handler(struct request_queue
*q
)
3997 struct fc_rport
*rport
= q
->queuedata
;
3998 struct Scsi_Host
*shost
= rport_to_shost(rport
);
4000 fc_bsg_request_handler(q
, shost
, rport
, &rport
->dev
);
4005 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
4006 * @shost: shost for fc_host
4007 * @fc_host: fc_host adding the structures to
4010 fc_bsg_hostadd(struct Scsi_Host
*shost
, struct fc_host_attrs
*fc_host
)
4012 struct device
*dev
= &shost
->shost_gendev
;
4013 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
4014 struct request_queue
*q
;
4018 fc_host
->rqst_q
= NULL
;
4020 if (!i
->f
->bsg_request
)
4023 snprintf(bsg_name
, sizeof(bsg_name
),
4024 "fc_host%d", shost
->host_no
);
4026 q
= __scsi_alloc_queue(shost
, fc_bsg_host_handler
);
4028 printk(KERN_ERR
"fc_host%d: bsg interface failed to "
4029 "initialize - no request queue\n",
4034 q
->queuedata
= shost
;
4035 queue_flag_set_unlocked(QUEUE_FLAG_BIDI
, q
);
4036 blk_queue_softirq_done(q
, fc_bsg_softirq_done
);
4037 blk_queue_rq_timed_out(q
, fc_bsg_job_timeout
);
4038 blk_queue_rq_timeout(q
, FC_DEFAULT_BSG_TIMEOUT
);
4040 err
= bsg_register_queue(q
, dev
, bsg_name
, NULL
);
4042 printk(KERN_ERR
"fc_host%d: bsg interface failed to "
4043 "initialize - register queue\n",
4045 blk_cleanup_queue(q
);
4049 fc_host
->rqst_q
= q
;
4055 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
4056 * @shost: shost that rport is attached to
4057 * @rport: rport that the bsg hooks are being attached to
4060 fc_bsg_rportadd(struct Scsi_Host
*shost
, struct fc_rport
*rport
)
4062 struct device
*dev
= &rport
->dev
;
4063 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
4064 struct request_queue
*q
;
4067 rport
->rqst_q
= NULL
;
4069 if (!i
->f
->bsg_request
)
4072 q
= __scsi_alloc_queue(shost
, fc_bsg_rport_handler
);
4074 printk(KERN_ERR
"%s: bsg interface failed to "
4075 "initialize - no request queue\n",
4080 q
->queuedata
= rport
;
4081 queue_flag_set_unlocked(QUEUE_FLAG_BIDI
, q
);
4082 blk_queue_softirq_done(q
, fc_bsg_softirq_done
);
4083 blk_queue_rq_timed_out(q
, fc_bsg_job_timeout
);
4084 blk_queue_rq_timeout(q
, BLK_DEFAULT_SG_TIMEOUT
);
4086 err
= bsg_register_queue(q
, dev
, NULL
, NULL
);
4088 printk(KERN_ERR
"%s: bsg interface failed to "
4089 "initialize - register queue\n",
4091 blk_cleanup_queue(q
);
4101 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
4102 * @q: the request_queue that is to be torn down.
4105 * Before unregistering the queue empty any requests that are blocked
4110 fc_bsg_remove(struct request_queue
*q
)
4112 struct request
*req
; /* block request */
4113 int counts
; /* totals for request_list count and starved */
4116 /* Stop taking in new requests */
4117 spin_lock_irq(q
->queue_lock
);
4120 /* drain all requests in the queue */
4122 /* need the lock to fetch a request
4123 * this may fetch the same reqeust as the previous pass
4125 req
= blk_fetch_request(q
);
4126 /* save requests in use and starved */
4127 counts
= q
->rq
.count
[0] + q
->rq
.count
[1] +
4128 q
->rq
.starved
[0] + q
->rq
.starved
[1];
4129 spin_unlock_irq(q
->queue_lock
);
4130 /* any requests still outstanding? */
4134 /* This may be the same req as the previous iteration,
4135 * always send the blk_end_request_all after a prefetch.
4136 * It is not okay to not end the request because the
4137 * prefetch started the request.
4140 /* return -ENXIO to indicate that this queue is
4143 req
->errors
= -ENXIO
;
4144 blk_end_request_all(req
, -ENXIO
);
4147 msleep(200); /* allow bsg to possibly finish */
4148 spin_lock_irq(q
->queue_lock
);
4151 bsg_unregister_queue(q
);
4152 blk_cleanup_queue(q
);
4157 /* Original Author: Martin Hicks */
4158 MODULE_AUTHOR("James Smart");
4159 MODULE_DESCRIPTION("FC Transport Attributes");
4160 MODULE_LICENSE("GPL");
4162 module_init(fc_transport_init
);
4163 module_exit(fc_transport_exit
);