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
*);
56 * Redefine so that we can have same named attributes in the
57 * sdev/starget/host objects.
59 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
60 struct device_attribute device_attr_##_prefix##_##_name = \
61 __ATTR(_name,_mode,_show,_store)
63 #define fc_enum_name_search(title, table_type, table) \
64 static const char *get_fc_##title##_name(enum table_type table_key) \
69 for (i = 0; i < ARRAY_SIZE(table); i++) { \
70 if (table[i].value == table_key) { \
71 name = table[i].name; \
78 #define fc_enum_name_match(title, table_type, table) \
79 static int get_fc_##title##_match(const char *table_key, \
80 enum table_type *value) \
84 for (i = 0; i < ARRAY_SIZE(table); i++) { \
85 if (strncmp(table_key, table[i].name, \
86 table[i].matchlen) == 0) { \
87 *value = table[i].value; \
88 return 0; /* success */ \
91 return 1; /* failure */ \
95 /* Convert fc_port_type values to ascii string name */
97 enum fc_port_type value
;
99 } fc_port_type_names
[] = {
100 { FC_PORTTYPE_UNKNOWN
, "Unknown" },
101 { FC_PORTTYPE_OTHER
, "Other" },
102 { FC_PORTTYPE_NOTPRESENT
, "Not Present" },
103 { FC_PORTTYPE_NPORT
, "NPort (fabric via point-to-point)" },
104 { FC_PORTTYPE_NLPORT
, "NLPort (fabric via loop)" },
105 { FC_PORTTYPE_LPORT
, "LPort (private loop)" },
106 { FC_PORTTYPE_PTP
, "Point-To-Point (direct nport connection)" },
107 { FC_PORTTYPE_NPIV
, "NPIV VPORT" },
109 fc_enum_name_search(port_type
, fc_port_type
, fc_port_type_names
)
110 #define FC_PORTTYPE_MAX_NAMELEN 50
112 /* Reuse fc_port_type enum function for vport_type */
113 #define get_fc_vport_type_name get_fc_port_type_name
116 /* Convert fc_host_event_code values to ascii string name */
117 static const struct {
118 enum fc_host_event_code value
;
120 } fc_host_event_code_names
[] = {
121 { FCH_EVT_LIP
, "lip" },
122 { FCH_EVT_LINKUP
, "link_up" },
123 { FCH_EVT_LINKDOWN
, "link_down" },
124 { FCH_EVT_LIPRESET
, "lip_reset" },
125 { FCH_EVT_RSCN
, "rscn" },
126 { FCH_EVT_ADAPTER_CHANGE
, "adapter_chg" },
127 { FCH_EVT_PORT_UNKNOWN
, "port_unknown" },
128 { FCH_EVT_PORT_ONLINE
, "port_online" },
129 { FCH_EVT_PORT_OFFLINE
, "port_offline" },
130 { FCH_EVT_PORT_FABRIC
, "port_fabric" },
131 { FCH_EVT_LINK_UNKNOWN
, "link_unknown" },
132 { FCH_EVT_VENDOR_UNIQUE
, "vendor_unique" },
134 fc_enum_name_search(host_event_code
, fc_host_event_code
,
135 fc_host_event_code_names
)
136 #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
139 /* Convert fc_port_state values to ascii string name */
141 enum fc_port_state value
;
143 } fc_port_state_names
[] = {
144 { FC_PORTSTATE_UNKNOWN
, "Unknown" },
145 { FC_PORTSTATE_NOTPRESENT
, "Not Present" },
146 { FC_PORTSTATE_ONLINE
, "Online" },
147 { FC_PORTSTATE_OFFLINE
, "Offline" },
148 { FC_PORTSTATE_BLOCKED
, "Blocked" },
149 { FC_PORTSTATE_BYPASSED
, "Bypassed" },
150 { FC_PORTSTATE_DIAGNOSTICS
, "Diagnostics" },
151 { FC_PORTSTATE_LINKDOWN
, "Linkdown" },
152 { FC_PORTSTATE_ERROR
, "Error" },
153 { FC_PORTSTATE_LOOPBACK
, "Loopback" },
154 { FC_PORTSTATE_DELETED
, "Deleted" },
156 fc_enum_name_search(port_state
, fc_port_state
, fc_port_state_names
)
157 #define FC_PORTSTATE_MAX_NAMELEN 20
160 /* Convert fc_vport_state values to ascii string name */
162 enum fc_vport_state value
;
164 } fc_vport_state_names
[] = {
165 { FC_VPORT_UNKNOWN
, "Unknown" },
166 { FC_VPORT_ACTIVE
, "Active" },
167 { FC_VPORT_DISABLED
, "Disabled" },
168 { FC_VPORT_LINKDOWN
, "Linkdown" },
169 { FC_VPORT_INITIALIZING
, "Initializing" },
170 { FC_VPORT_NO_FABRIC_SUPP
, "No Fabric Support" },
171 { FC_VPORT_NO_FABRIC_RSCS
, "No Fabric Resources" },
172 { FC_VPORT_FABRIC_LOGOUT
, "Fabric Logout" },
173 { FC_VPORT_FABRIC_REJ_WWN
, "Fabric Rejected WWN" },
174 { FC_VPORT_FAILED
, "VPort Failed" },
176 fc_enum_name_search(vport_state
, fc_vport_state
, fc_vport_state_names
)
177 #define FC_VPORTSTATE_MAX_NAMELEN 24
179 /* Reuse fc_vport_state enum function for vport_last_state */
180 #define get_fc_vport_last_state_name get_fc_vport_state_name
183 /* Convert fc_tgtid_binding_type values to ascii string name */
184 static const struct {
185 enum fc_tgtid_binding_type value
;
188 } fc_tgtid_binding_type_names
[] = {
189 { FC_TGTID_BIND_NONE
, "none", 4 },
190 { FC_TGTID_BIND_BY_WWPN
, "wwpn (World Wide Port Name)", 4 },
191 { FC_TGTID_BIND_BY_WWNN
, "wwnn (World Wide Node Name)", 4 },
192 { FC_TGTID_BIND_BY_ID
, "port_id (FC Address)", 7 },
194 fc_enum_name_search(tgtid_bind_type
, fc_tgtid_binding_type
,
195 fc_tgtid_binding_type_names
)
196 fc_enum_name_match(tgtid_bind_type
, fc_tgtid_binding_type
,
197 fc_tgtid_binding_type_names
)
198 #define FC_BINDTYPE_MAX_NAMELEN 30
201 #define fc_bitfield_name_search(title, table) \
203 get_fc_##title##_names(u32 table_key, char *buf) \
209 for (i = 0; i < ARRAY_SIZE(table); i++) { \
210 if (table[i].value & table_key) { \
211 len += sprintf(buf + len, "%s%s", \
212 prefix, table[i].name); \
216 len += sprintf(buf + len, "\n"); \
221 /* Convert FC_COS bit values to ascii string name */
222 static const struct {
226 { FC_COS_CLASS1
, "Class 1" },
227 { FC_COS_CLASS2
, "Class 2" },
228 { FC_COS_CLASS3
, "Class 3" },
229 { FC_COS_CLASS4
, "Class 4" },
230 { FC_COS_CLASS6
, "Class 6" },
232 fc_bitfield_name_search(cos
, fc_cos_names
)
235 /* Convert FC_PORTSPEED bit values to ascii string name */
236 static const struct {
239 } fc_port_speed_names
[] = {
240 { FC_PORTSPEED_1GBIT
, "1 Gbit" },
241 { FC_PORTSPEED_2GBIT
, "2 Gbit" },
242 { FC_PORTSPEED_4GBIT
, "4 Gbit" },
243 { FC_PORTSPEED_10GBIT
, "10 Gbit" },
244 { FC_PORTSPEED_8GBIT
, "8 Gbit" },
245 { FC_PORTSPEED_16GBIT
, "16 Gbit" },
246 { FC_PORTSPEED_NOT_NEGOTIATED
, "Not Negotiated" },
248 fc_bitfield_name_search(port_speed
, fc_port_speed_names
)
252 show_fc_fc4s (char *buf
, u8
*fc4_list
)
256 for (i
= 0; i
< FC_FC4_LIST_SIZE
; i
++, fc4_list
++)
257 len
+= sprintf(buf
+ len
, "0x%02x ", *fc4_list
);
258 len
+= sprintf(buf
+ len
, "\n");
263 /* Convert FC_PORT_ROLE bit values to ascii string name */
264 static const struct {
267 } fc_port_role_names
[] = {
268 { FC_PORT_ROLE_FCP_TARGET
, "FCP Target" },
269 { FC_PORT_ROLE_FCP_INITIATOR
, "FCP Initiator" },
270 { FC_PORT_ROLE_IP_PORT
, "IP Port" },
272 fc_bitfield_name_search(port_roles
, fc_port_role_names
)
275 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
277 #define FC_WELLKNOWN_PORTID_MASK 0xfffff0
278 #define FC_WELLKNOWN_ROLE_MASK 0x00000f
279 #define FC_FPORT_PORTID 0x00000e
280 #define FC_FABCTLR_PORTID 0x00000d
281 #define FC_DIRSRVR_PORTID 0x00000c
282 #define FC_TIMESRVR_PORTID 0x00000b
283 #define FC_MGMTSRVR_PORTID 0x00000a
286 static void fc_timeout_deleted_rport(struct work_struct
*work
);
287 static void fc_timeout_fail_rport_io(struct work_struct
*work
);
288 static void fc_scsi_scan_rport(struct work_struct
*work
);
291 * Attribute counts pre object type...
292 * Increase these values if you add attributes
294 #define FC_STARGET_NUM_ATTRS 3
295 #define FC_RPORT_NUM_ATTRS 10
296 #define FC_VPORT_NUM_ATTRS 9
297 #define FC_HOST_NUM_ATTRS 22
300 struct scsi_transport_template t
;
301 struct fc_function_template
*f
;
304 * For attributes : each object has :
305 * An array of the actual attributes structures
306 * An array of null-terminated pointers to the attribute
307 * structures - used for mid-layer interaction.
309 * The attribute containers for the starget and host are are
310 * part of the midlayer. As the remote port is specific to the
311 * fc transport, we must provide the attribute container.
313 struct device_attribute private_starget_attrs
[
314 FC_STARGET_NUM_ATTRS
];
315 struct device_attribute
*starget_attrs
[FC_STARGET_NUM_ATTRS
+ 1];
317 struct device_attribute private_host_attrs
[FC_HOST_NUM_ATTRS
];
318 struct device_attribute
*host_attrs
[FC_HOST_NUM_ATTRS
+ 1];
320 struct transport_container rport_attr_cont
;
321 struct device_attribute private_rport_attrs
[FC_RPORT_NUM_ATTRS
];
322 struct device_attribute
*rport_attrs
[FC_RPORT_NUM_ATTRS
+ 1];
324 struct transport_container vport_attr_cont
;
325 struct device_attribute private_vport_attrs
[FC_VPORT_NUM_ATTRS
];
326 struct device_attribute
*vport_attrs
[FC_VPORT_NUM_ATTRS
+ 1];
329 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
331 static int fc_target_setup(struct transport_container
*tc
, struct device
*dev
,
334 struct scsi_target
*starget
= to_scsi_target(dev
);
335 struct fc_rport
*rport
= starget_to_rport(starget
);
338 * if parent is remote port, use values from remote port.
339 * Otherwise, this host uses the fc_transport, but not the
340 * remote port interface. As such, initialize to known non-values.
343 fc_starget_node_name(starget
) = rport
->node_name
;
344 fc_starget_port_name(starget
) = rport
->port_name
;
345 fc_starget_port_id(starget
) = rport
->port_id
;
347 fc_starget_node_name(starget
) = -1;
348 fc_starget_port_name(starget
) = -1;
349 fc_starget_port_id(starget
) = -1;
355 static DECLARE_TRANSPORT_CLASS(fc_transport_class
,
361 static int fc_host_setup(struct transport_container
*tc
, struct device
*dev
,
364 struct Scsi_Host
*shost
= dev_to_shost(dev
);
365 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
368 * Set default values easily detected by the midlayer as
369 * failure cases. The scsi lldd is responsible for initializing
370 * all transport attributes to valid values per host.
372 fc_host
->node_name
= -1;
373 fc_host
->port_name
= -1;
374 fc_host
->permanent_port_name
= -1;
375 fc_host
->supported_classes
= FC_COS_UNSPECIFIED
;
376 memset(fc_host
->supported_fc4s
, 0,
377 sizeof(fc_host
->supported_fc4s
));
378 fc_host
->supported_speeds
= FC_PORTSPEED_UNKNOWN
;
379 fc_host
->maxframe_size
= -1;
380 fc_host
->max_npiv_vports
= 0;
381 memset(fc_host
->serial_number
, 0,
382 sizeof(fc_host
->serial_number
));
384 fc_host
->port_id
= -1;
385 fc_host
->port_type
= FC_PORTTYPE_UNKNOWN
;
386 fc_host
->port_state
= FC_PORTSTATE_UNKNOWN
;
387 memset(fc_host
->active_fc4s
, 0,
388 sizeof(fc_host
->active_fc4s
));
389 fc_host
->speed
= FC_PORTSPEED_UNKNOWN
;
390 fc_host
->fabric_name
= -1;
391 memset(fc_host
->symbolic_name
, 0, sizeof(fc_host
->symbolic_name
));
392 memset(fc_host
->system_hostname
, 0, sizeof(fc_host
->system_hostname
));
394 fc_host
->tgtid_bind_type
= FC_TGTID_BIND_BY_WWPN
;
396 INIT_LIST_HEAD(&fc_host
->rports
);
397 INIT_LIST_HEAD(&fc_host
->rport_bindings
);
398 INIT_LIST_HEAD(&fc_host
->vports
);
399 fc_host
->next_rport_number
= 0;
400 fc_host
->next_target_id
= 0;
401 fc_host
->next_vport_number
= 0;
402 fc_host
->npiv_vports_inuse
= 0;
404 snprintf(fc_host
->work_q_name
, sizeof(fc_host
->work_q_name
),
405 "fc_wq_%d", shost
->host_no
);
406 fc_host
->work_q
= create_singlethread_workqueue(
407 fc_host
->work_q_name
);
408 if (!fc_host
->work_q
)
411 snprintf(fc_host
->devloss_work_q_name
,
412 sizeof(fc_host
->devloss_work_q_name
),
413 "fc_dl_%d", shost
->host_no
);
414 fc_host
->devloss_work_q
= create_singlethread_workqueue(
415 fc_host
->devloss_work_q_name
);
416 if (!fc_host
->devloss_work_q
) {
417 destroy_workqueue(fc_host
->work_q
);
418 fc_host
->work_q
= NULL
;
422 fc_bsg_hostadd(shost
, fc_host
);
423 /* ignore any bsg add error - we just can't do sgio */
428 static int fc_host_remove(struct transport_container
*tc
, struct device
*dev
,
431 struct Scsi_Host
*shost
= dev_to_shost(dev
);
432 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
434 fc_bsg_remove(fc_host
->rqst_q
);
438 static DECLARE_TRANSPORT_CLASS(fc_host_class
,
445 * Setup and Remove actions for remote ports are handled
446 * in the service functions below.
448 static DECLARE_TRANSPORT_CLASS(fc_rport_class
,
455 * Setup and Remove actions for virtual ports are handled
456 * in the service functions below.
458 static DECLARE_TRANSPORT_CLASS(fc_vport_class
,
469 * dev_loss_tmo: the default number of seconds that the FC transport
470 * should insulate the loss of a remote port.
471 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
473 static unsigned int fc_dev_loss_tmo
= 60; /* seconds */
475 module_param_named(dev_loss_tmo
, fc_dev_loss_tmo
, uint
, S_IRUGO
|S_IWUSR
);
476 MODULE_PARM_DESC(dev_loss_tmo
,
477 "Maximum number of seconds that the FC transport should"
478 " insulate the loss of a remote port. Once this value is"
479 " exceeded, the scsi target is removed. Value should be"
480 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
481 " fast_io_fail_tmo is not set.");
484 * Netlink Infrastructure
487 static atomic_t fc_event_seq
;
490 * fc_get_event_number - Obtain the next sequential FC event number
493 * We could have inlined this, but it would have required fc_event_seq to
494 * be exposed. For now, live with the subroutine call.
495 * Atomic used to avoid lock/unlock...
498 fc_get_event_number(void)
500 return atomic_add_return(1, &fc_event_seq
);
502 EXPORT_SYMBOL(fc_get_event_number
);
506 * fc_host_post_event - called to post an even on an fc_host.
507 * @shost: host the event occurred on
508 * @event_number: fc event number obtained from get_fc_event_number()
509 * @event_code: fc_host event being posted
510 * @event_data: 32bits of data for the event being posted
513 * This routine assumes no locks are held on entry.
516 fc_host_post_event(struct Scsi_Host
*shost
, u32 event_number
,
517 enum fc_host_event_code event_code
, u32 event_data
)
520 struct nlmsghdr
*nlh
;
521 struct fc_nl_event
*event
;
531 len
= FC_NL_MSGALIGN(sizeof(*event
));
532 skblen
= NLMSG_SPACE(len
);
534 skb
= alloc_skb(skblen
, GFP_KERNEL
);
540 nlh
= nlmsg_put(skb
, 0, 0, SCSI_TRANSPORT_MSG
,
541 skblen
- sizeof(*nlh
), 0);
546 event
= NLMSG_DATA(nlh
);
548 INIT_SCSI_NL_HDR(&event
->snlh
, SCSI_NL_TRANSPORT_FC
,
549 FC_NL_ASYNC_EVENT
, len
);
550 event
->seconds
= get_seconds();
551 event
->vendor_id
= 0;
552 event
->host_no
= shost
->host_no
;
553 event
->event_datalen
= sizeof(u32
); /* bytes */
554 event
->event_num
= event_number
;
555 event
->event_code
= event_code
;
556 event
->event_data
= event_data
;
558 nlmsg_multicast(scsi_nl_sock
, skb
, 0, SCSI_NL_GRP_FC_EVENTS
,
565 name
= get_fc_host_event_code_name(event_code
);
567 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
568 __func__
, shost
->host_no
,
569 (name
) ? name
: "<unknown>", event_data
, err
);
572 EXPORT_SYMBOL(fc_host_post_event
);
576 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
577 * @shost: host the event occurred on
578 * @event_number: fc event number obtained from get_fc_event_number()
579 * @data_len: amount, in bytes, of vendor unique data
580 * @data_buf: pointer to vendor unique data
581 * @vendor_id: Vendor id
584 * This routine assumes no locks are held on entry.
587 fc_host_post_vendor_event(struct Scsi_Host
*shost
, u32 event_number
,
588 u32 data_len
, char * data_buf
, u64 vendor_id
)
591 struct nlmsghdr
*nlh
;
592 struct fc_nl_event
*event
;
598 goto send_vendor_fail
;
601 len
= FC_NL_MSGALIGN(sizeof(*event
) + data_len
);
602 skblen
= NLMSG_SPACE(len
);
604 skb
= alloc_skb(skblen
, GFP_KERNEL
);
607 goto send_vendor_fail
;
610 nlh
= nlmsg_put(skb
, 0, 0, SCSI_TRANSPORT_MSG
,
611 skblen
- sizeof(*nlh
), 0);
614 goto send_vendor_fail_skb
;
616 event
= NLMSG_DATA(nlh
);
618 INIT_SCSI_NL_HDR(&event
->snlh
, SCSI_NL_TRANSPORT_FC
,
619 FC_NL_ASYNC_EVENT
, len
);
620 event
->seconds
= get_seconds();
621 event
->vendor_id
= vendor_id
;
622 event
->host_no
= shost
->host_no
;
623 event
->event_datalen
= data_len
; /* bytes */
624 event
->event_num
= event_number
;
625 event
->event_code
= FCH_EVT_VENDOR_UNIQUE
;
626 memcpy(&event
->event_data
, data_buf
, data_len
);
628 nlmsg_multicast(scsi_nl_sock
, skb
, 0, SCSI_NL_GRP_FC_EVENTS
,
632 send_vendor_fail_skb
:
636 "%s: Dropped Event : host %d vendor_unique - err %d\n",
637 __func__
, shost
->host_no
, err
);
640 EXPORT_SYMBOL(fc_host_post_vendor_event
);
644 static __init
int fc_transport_init(void)
648 atomic_set(&fc_event_seq
, 0);
650 error
= transport_class_register(&fc_host_class
);
653 error
= transport_class_register(&fc_vport_class
);
655 goto unreg_host_class
;
656 error
= transport_class_register(&fc_rport_class
);
658 goto unreg_vport_class
;
659 error
= transport_class_register(&fc_transport_class
);
661 goto unreg_rport_class
;
665 transport_class_unregister(&fc_rport_class
);
667 transport_class_unregister(&fc_vport_class
);
669 transport_class_unregister(&fc_host_class
);
673 static void __exit
fc_transport_exit(void)
675 transport_class_unregister(&fc_transport_class
);
676 transport_class_unregister(&fc_rport_class
);
677 transport_class_unregister(&fc_host_class
);
678 transport_class_unregister(&fc_vport_class
);
682 * FC Remote Port Attribute Management
685 #define fc_rport_show_function(field, format_string, sz, cast) \
687 show_fc_rport_##field (struct device *dev, \
688 struct device_attribute *attr, char *buf) \
690 struct fc_rport *rport = transport_class_to_rport(dev); \
691 struct Scsi_Host *shost = rport_to_shost(rport); \
692 struct fc_internal *i = to_fc_internal(shost->transportt); \
693 if ((i->f->get_rport_##field) && \
694 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
695 (rport->port_state == FC_PORTSTATE_DELETED) || \
696 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
697 i->f->get_rport_##field(rport); \
698 return snprintf(buf, sz, format_string, cast rport->field); \
701 #define fc_rport_store_function(field) \
703 store_fc_rport_##field(struct device *dev, \
704 struct device_attribute *attr, \
705 const char *buf, size_t count) \
708 struct fc_rport *rport = transport_class_to_rport(dev); \
709 struct Scsi_Host *shost = rport_to_shost(rport); \
710 struct fc_internal *i = to_fc_internal(shost->transportt); \
712 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
713 (rport->port_state == FC_PORTSTATE_DELETED) || \
714 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
716 val = simple_strtoul(buf, &cp, 0); \
717 if (*cp && (*cp != '\n')) \
719 i->f->set_rport_##field(rport, val); \
723 #define fc_rport_rd_attr(field, format_string, sz) \
724 fc_rport_show_function(field, format_string, sz, ) \
725 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
726 show_fc_rport_##field, NULL)
728 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
729 fc_rport_show_function(field, format_string, sz, (cast)) \
730 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
731 show_fc_rport_##field, NULL)
733 #define fc_rport_rw_attr(field, format_string, sz) \
734 fc_rport_show_function(field, format_string, sz, ) \
735 fc_rport_store_function(field) \
736 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
737 show_fc_rport_##field, \
738 store_fc_rport_##field)
741 #define fc_private_rport_show_function(field, format_string, sz, cast) \
743 show_fc_rport_##field (struct device *dev, \
744 struct device_attribute *attr, char *buf) \
746 struct fc_rport *rport = transport_class_to_rport(dev); \
747 return snprintf(buf, sz, format_string, cast rport->field); \
750 #define fc_private_rport_rd_attr(field, format_string, sz) \
751 fc_private_rport_show_function(field, format_string, sz, ) \
752 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
753 show_fc_rport_##field, NULL)
755 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
756 fc_private_rport_show_function(field, format_string, sz, (cast)) \
757 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
758 show_fc_rport_##field, NULL)
761 #define fc_private_rport_rd_enum_attr(title, maxlen) \
763 show_fc_rport_##title (struct device *dev, \
764 struct device_attribute *attr, char *buf) \
766 struct fc_rport *rport = transport_class_to_rport(dev); \
768 name = get_fc_##title##_name(rport->title); \
771 return snprintf(buf, maxlen, "%s\n", name); \
773 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
774 show_fc_rport_##title, NULL)
777 #define SETUP_RPORT_ATTRIBUTE_RD(field) \
778 i->private_rport_attrs[count] = device_attr_rport_##field; \
779 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
780 i->private_rport_attrs[count].store = NULL; \
781 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
782 if (i->f->show_rport_##field) \
785 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
786 i->private_rport_attrs[count] = device_attr_rport_##field; \
787 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
788 i->private_rport_attrs[count].store = NULL; \
789 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
792 #define SETUP_RPORT_ATTRIBUTE_RW(field) \
793 i->private_rport_attrs[count] = device_attr_rport_##field; \
794 if (!i->f->set_rport_##field) { \
795 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
796 i->private_rport_attrs[count].store = NULL; \
798 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
799 if (i->f->show_rport_##field) \
802 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
804 i->private_rport_attrs[count] = device_attr_rport_##field; \
805 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
810 /* The FC Transport Remote Port Attributes: */
812 /* Fixed Remote Port Attributes */
814 fc_private_rport_rd_attr(maxframe_size
, "%u bytes\n", 20);
817 show_fc_rport_supported_classes (struct device
*dev
,
818 struct device_attribute
*attr
, char *buf
)
820 struct fc_rport
*rport
= transport_class_to_rport(dev
);
821 if (rport
->supported_classes
== FC_COS_UNSPECIFIED
)
822 return snprintf(buf
, 20, "unspecified\n");
823 return get_fc_cos_names(rport
->supported_classes
, buf
);
825 static FC_DEVICE_ATTR(rport
, supported_classes
, S_IRUGO
,
826 show_fc_rport_supported_classes
, NULL
);
828 /* Dynamic Remote Port Attributes */
831 * dev_loss_tmo attribute
833 fc_rport_show_function(dev_loss_tmo
, "%d\n", 20, )
835 store_fc_rport_dev_loss_tmo(struct device
*dev
, struct device_attribute
*attr
,
836 const char *buf
, size_t count
)
839 struct fc_rport
*rport
= transport_class_to_rport(dev
);
840 struct Scsi_Host
*shost
= rport_to_shost(rport
);
841 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
843 if ((rport
->port_state
== FC_PORTSTATE_BLOCKED
) ||
844 (rport
->port_state
== FC_PORTSTATE_DELETED
) ||
845 (rport
->port_state
== FC_PORTSTATE_NOTPRESENT
))
847 val
= simple_strtoul(buf
, &cp
, 0);
848 if ((*cp
&& (*cp
!= '\n')) || (val
< 0))
852 * Check for overflow; dev_loss_tmo is u32
858 * If fast_io_fail is off we have to cap
859 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
861 if (rport
->fast_io_fail_tmo
== -1 &&
862 val
> SCSI_DEVICE_BLOCK_MAX_TIMEOUT
)
865 i
->f
->set_rport_dev_loss_tmo(rport
, val
);
868 static FC_DEVICE_ATTR(rport
, dev_loss_tmo
, S_IRUGO
| S_IWUSR
,
869 show_fc_rport_dev_loss_tmo
, store_fc_rport_dev_loss_tmo
);
872 /* Private Remote Port Attributes */
874 fc_private_rport_rd_attr_cast(node_name
, "0x%llx\n", 20, unsigned long long);
875 fc_private_rport_rd_attr_cast(port_name
, "0x%llx\n", 20, unsigned long long);
876 fc_private_rport_rd_attr(port_id
, "0x%06x\n", 20);
879 show_fc_rport_roles (struct device
*dev
, struct device_attribute
*attr
,
882 struct fc_rport
*rport
= transport_class_to_rport(dev
);
884 /* identify any roles that are port_id specific */
885 if ((rport
->port_id
!= -1) &&
886 (rport
->port_id
& FC_WELLKNOWN_PORTID_MASK
) ==
887 FC_WELLKNOWN_PORTID_MASK
) {
888 switch (rport
->port_id
& FC_WELLKNOWN_ROLE_MASK
) {
889 case FC_FPORT_PORTID
:
890 return snprintf(buf
, 30, "Fabric Port\n");
891 case FC_FABCTLR_PORTID
:
892 return snprintf(buf
, 30, "Fabric Controller\n");
893 case FC_DIRSRVR_PORTID
:
894 return snprintf(buf
, 30, "Directory Server\n");
895 case FC_TIMESRVR_PORTID
:
896 return snprintf(buf
, 30, "Time Server\n");
897 case FC_MGMTSRVR_PORTID
:
898 return snprintf(buf
, 30, "Management Server\n");
900 return snprintf(buf
, 30, "Unknown Fabric Entity\n");
903 if (rport
->roles
== FC_PORT_ROLE_UNKNOWN
)
904 return snprintf(buf
, 20, "unknown\n");
905 return get_fc_port_roles_names(rport
->roles
, buf
);
908 static FC_DEVICE_ATTR(rport
, roles
, S_IRUGO
,
909 show_fc_rport_roles
, NULL
);
911 fc_private_rport_rd_enum_attr(port_state
, FC_PORTSTATE_MAX_NAMELEN
);
912 fc_private_rport_rd_attr(scsi_target_id
, "%d\n", 20);
915 * fast_io_fail_tmo attribute
918 show_fc_rport_fast_io_fail_tmo (struct device
*dev
,
919 struct device_attribute
*attr
, char *buf
)
921 struct fc_rport
*rport
= transport_class_to_rport(dev
);
923 if (rport
->fast_io_fail_tmo
== -1)
924 return snprintf(buf
, 5, "off\n");
925 return snprintf(buf
, 20, "%d\n", rport
->fast_io_fail_tmo
);
929 store_fc_rport_fast_io_fail_tmo(struct device
*dev
,
930 struct device_attribute
*attr
, const char *buf
,
935 struct fc_rport
*rport
= transport_class_to_rport(dev
);
937 if ((rport
->port_state
== FC_PORTSTATE_BLOCKED
) ||
938 (rport
->port_state
== FC_PORTSTATE_DELETED
) ||
939 (rport
->port_state
== FC_PORTSTATE_NOTPRESENT
))
941 if (strncmp(buf
, "off", 3) == 0)
942 rport
->fast_io_fail_tmo
= -1;
944 val
= simple_strtoul(buf
, &cp
, 0);
945 if ((*cp
&& (*cp
!= '\n')) || (val
< 0))
948 * Cap fast_io_fail by dev_loss_tmo or
949 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
951 if ((val
>= rport
->dev_loss_tmo
) ||
952 (val
> SCSI_DEVICE_BLOCK_MAX_TIMEOUT
))
955 rport
->fast_io_fail_tmo
= val
;
959 static FC_DEVICE_ATTR(rport
, fast_io_fail_tmo
, S_IRUGO
| S_IWUSR
,
960 show_fc_rport_fast_io_fail_tmo
, store_fc_rport_fast_io_fail_tmo
);
964 * FC SCSI Target Attribute Management
968 * Note: in the target show function we recognize when the remote
969 * port is in the hierarchy and do not allow the driver to get
970 * involved in sysfs functions. The driver only gets involved if
971 * it's the "old" style that doesn't use rports.
973 #define fc_starget_show_function(field, format_string, sz, cast) \
975 show_fc_starget_##field (struct device *dev, \
976 struct device_attribute *attr, char *buf) \
978 struct scsi_target *starget = transport_class_to_starget(dev); \
979 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
980 struct fc_internal *i = to_fc_internal(shost->transportt); \
981 struct fc_rport *rport = starget_to_rport(starget); \
983 fc_starget_##field(starget) = rport->field; \
984 else if (i->f->get_starget_##field) \
985 i->f->get_starget_##field(starget); \
986 return snprintf(buf, sz, format_string, \
987 cast fc_starget_##field(starget)); \
990 #define fc_starget_rd_attr(field, format_string, sz) \
991 fc_starget_show_function(field, format_string, sz, ) \
992 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
993 show_fc_starget_##field, NULL)
995 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
996 fc_starget_show_function(field, format_string, sz, (cast)) \
997 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
998 show_fc_starget_##field, NULL)
1000 #define SETUP_STARGET_ATTRIBUTE_RD(field) \
1001 i->private_starget_attrs[count] = device_attr_starget_##field; \
1002 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1003 i->private_starget_attrs[count].store = NULL; \
1004 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1005 if (i->f->show_starget_##field) \
1008 #define SETUP_STARGET_ATTRIBUTE_RW(field) \
1009 i->private_starget_attrs[count] = device_attr_starget_##field; \
1010 if (!i->f->set_starget_##field) { \
1011 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1012 i->private_starget_attrs[count].store = NULL; \
1014 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1015 if (i->f->show_starget_##field) \
1018 /* The FC Transport SCSI Target Attributes: */
1019 fc_starget_rd_attr_cast(node_name
, "0x%llx\n", 20, unsigned long long);
1020 fc_starget_rd_attr_cast(port_name
, "0x%llx\n", 20, unsigned long long);
1021 fc_starget_rd_attr(port_id
, "0x%06x\n", 20);
1025 * FC Virtual Port Attribute Management
1028 #define fc_vport_show_function(field, format_string, sz, cast) \
1030 show_fc_vport_##field (struct device *dev, \
1031 struct device_attribute *attr, char *buf) \
1033 struct fc_vport *vport = transport_class_to_vport(dev); \
1034 struct Scsi_Host *shost = vport_to_shost(vport); \
1035 struct fc_internal *i = to_fc_internal(shost->transportt); \
1036 if ((i->f->get_vport_##field) && \
1037 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1038 i->f->get_vport_##field(vport); \
1039 return snprintf(buf, sz, format_string, cast vport->field); \
1042 #define fc_vport_store_function(field) \
1044 store_fc_vport_##field(struct device *dev, \
1045 struct device_attribute *attr, \
1046 const char *buf, size_t count) \
1049 struct fc_vport *vport = transport_class_to_vport(dev); \
1050 struct Scsi_Host *shost = vport_to_shost(vport); \
1051 struct fc_internal *i = to_fc_internal(shost->transportt); \
1053 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1055 val = simple_strtoul(buf, &cp, 0); \
1056 if (*cp && (*cp != '\n')) \
1058 i->f->set_vport_##field(vport, val); \
1062 #define fc_vport_store_str_function(field, slen) \
1064 store_fc_vport_##field(struct device *dev, \
1065 struct device_attribute *attr, \
1066 const char *buf, size_t count) \
1068 struct fc_vport *vport = transport_class_to_vport(dev); \
1069 struct Scsi_Host *shost = vport_to_shost(vport); \
1070 struct fc_internal *i = to_fc_internal(shost->transportt); \
1071 unsigned int cnt=count; \
1073 /* count may include a LF at end of string */ \
1074 if (buf[cnt-1] == '\n') \
1076 if (cnt > ((slen) - 1)) \
1078 memcpy(vport->field, buf, cnt); \
1079 i->f->set_vport_##field(vport); \
1083 #define fc_vport_rd_attr(field, format_string, sz) \
1084 fc_vport_show_function(field, format_string, sz, ) \
1085 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1086 show_fc_vport_##field, NULL)
1088 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1089 fc_vport_show_function(field, format_string, sz, (cast)) \
1090 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1091 show_fc_vport_##field, NULL)
1093 #define fc_vport_rw_attr(field, format_string, sz) \
1094 fc_vport_show_function(field, format_string, sz, ) \
1095 fc_vport_store_function(field) \
1096 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1097 show_fc_vport_##field, \
1098 store_fc_vport_##field)
1100 #define fc_private_vport_show_function(field, format_string, sz, cast) \
1102 show_fc_vport_##field (struct device *dev, \
1103 struct device_attribute *attr, char *buf) \
1105 struct fc_vport *vport = transport_class_to_vport(dev); \
1106 return snprintf(buf, sz, format_string, cast vport->field); \
1109 #define fc_private_vport_store_u32_function(field) \
1111 store_fc_vport_##field(struct device *dev, \
1112 struct device_attribute *attr, \
1113 const char *buf, size_t count) \
1116 struct fc_vport *vport = transport_class_to_vport(dev); \
1118 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1120 val = simple_strtoul(buf, &cp, 0); \
1121 if (*cp && (*cp != '\n')) \
1123 vport->field = val; \
1128 #define fc_private_vport_rd_attr(field, format_string, sz) \
1129 fc_private_vport_show_function(field, format_string, sz, ) \
1130 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1131 show_fc_vport_##field, NULL)
1133 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1134 fc_private_vport_show_function(field, format_string, sz, (cast)) \
1135 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1136 show_fc_vport_##field, NULL)
1138 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1139 fc_private_vport_show_function(field, format_string, sz, ) \
1140 fc_private_vport_store_u32_function(field) \
1141 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1142 show_fc_vport_##field, \
1143 store_fc_vport_##field)
1146 #define fc_private_vport_rd_enum_attr(title, maxlen) \
1148 show_fc_vport_##title (struct device *dev, \
1149 struct device_attribute *attr, \
1152 struct fc_vport *vport = transport_class_to_vport(dev); \
1154 name = get_fc_##title##_name(vport->title); \
1157 return snprintf(buf, maxlen, "%s\n", name); \
1159 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
1160 show_fc_vport_##title, NULL)
1163 #define SETUP_VPORT_ATTRIBUTE_RD(field) \
1164 i->private_vport_attrs[count] = device_attr_vport_##field; \
1165 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1166 i->private_vport_attrs[count].store = NULL; \
1167 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1168 if (i->f->get_##field) \
1170 /* NOTE: Above MACRO differs: checks function not show bit */
1172 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
1173 i->private_vport_attrs[count] = device_attr_vport_##field; \
1174 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1175 i->private_vport_attrs[count].store = NULL; \
1176 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1179 #define SETUP_VPORT_ATTRIBUTE_WR(field) \
1180 i->private_vport_attrs[count] = device_attr_vport_##field; \
1181 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1184 /* NOTE: Above MACRO differs: checks function */
1186 #define SETUP_VPORT_ATTRIBUTE_RW(field) \
1187 i->private_vport_attrs[count] = device_attr_vport_##field; \
1188 if (!i->f->set_vport_##field) { \
1189 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1190 i->private_vport_attrs[count].store = NULL; \
1192 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1194 /* NOTE: Above MACRO differs: does not check show bit */
1196 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1198 i->private_vport_attrs[count] = device_attr_vport_##field; \
1199 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1204 /* The FC Transport Virtual Port Attributes: */
1206 /* Fixed Virtual Port Attributes */
1208 /* Dynamic Virtual Port Attributes */
1210 /* Private Virtual Port Attributes */
1212 fc_private_vport_rd_enum_attr(vport_state
, FC_VPORTSTATE_MAX_NAMELEN
);
1213 fc_private_vport_rd_enum_attr(vport_last_state
, FC_VPORTSTATE_MAX_NAMELEN
);
1214 fc_private_vport_rd_attr_cast(node_name
, "0x%llx\n", 20, unsigned long long);
1215 fc_private_vport_rd_attr_cast(port_name
, "0x%llx\n", 20, unsigned long long);
1218 show_fc_vport_roles (struct device
*dev
, struct device_attribute
*attr
,
1221 struct fc_vport
*vport
= transport_class_to_vport(dev
);
1223 if (vport
->roles
== FC_PORT_ROLE_UNKNOWN
)
1224 return snprintf(buf
, 20, "unknown\n");
1225 return get_fc_port_roles_names(vport
->roles
, buf
);
1227 static FC_DEVICE_ATTR(vport
, roles
, S_IRUGO
, show_fc_vport_roles
, NULL
);
1229 fc_private_vport_rd_enum_attr(vport_type
, FC_PORTTYPE_MAX_NAMELEN
);
1231 fc_private_vport_show_function(symbolic_name
, "%s\n",
1232 FC_VPORT_SYMBOLIC_NAMELEN
+ 1, )
1233 fc_vport_store_str_function(symbolic_name
, FC_VPORT_SYMBOLIC_NAMELEN
)
1234 static FC_DEVICE_ATTR(vport
, symbolic_name
, S_IRUGO
| S_IWUSR
,
1235 show_fc_vport_symbolic_name
, store_fc_vport_symbolic_name
);
1238 store_fc_vport_delete(struct device
*dev
, struct device_attribute
*attr
,
1239 const char *buf
, size_t count
)
1241 struct fc_vport
*vport
= transport_class_to_vport(dev
);
1242 struct Scsi_Host
*shost
= vport_to_shost(vport
);
1243 unsigned long flags
;
1245 spin_lock_irqsave(shost
->host_lock
, flags
);
1246 if (vport
->flags
& (FC_VPORT_DEL
| FC_VPORT_CREATING
)) {
1247 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1250 vport
->flags
|= FC_VPORT_DELETING
;
1251 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1253 fc_queue_work(shost
, &vport
->vport_delete_work
);
1256 static FC_DEVICE_ATTR(vport
, vport_delete
, S_IWUSR
,
1257 NULL
, store_fc_vport_delete
);
1261 * Enable/Disable vport
1262 * Write "1" to disable, write "0" to enable
1265 store_fc_vport_disable(struct device
*dev
, struct device_attribute
*attr
,
1269 struct fc_vport
*vport
= transport_class_to_vport(dev
);
1270 struct Scsi_Host
*shost
= vport_to_shost(vport
);
1271 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1274 if (vport
->flags
& (FC_VPORT_DEL
| FC_VPORT_CREATING
))
1278 if (vport
->vport_state
!= FC_VPORT_DISABLED
)
1280 } else if (*buf
== '1') {
1281 if (vport
->vport_state
== FC_VPORT_DISABLED
)
1286 stat
= i
->f
->vport_disable(vport
, ((*buf
== '0') ? false : true));
1287 return stat
? stat
: count
;
1289 static FC_DEVICE_ATTR(vport
, vport_disable
, S_IWUSR
,
1290 NULL
, store_fc_vport_disable
);
1294 * Host Attribute Management
1297 #define fc_host_show_function(field, format_string, sz, cast) \
1299 show_fc_host_##field (struct device *dev, \
1300 struct device_attribute *attr, char *buf) \
1302 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1303 struct fc_internal *i = to_fc_internal(shost->transportt); \
1304 if (i->f->get_host_##field) \
1305 i->f->get_host_##field(shost); \
1306 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1309 #define fc_host_store_function(field) \
1311 store_fc_host_##field(struct device *dev, \
1312 struct device_attribute *attr, \
1313 const char *buf, size_t count) \
1316 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1317 struct fc_internal *i = to_fc_internal(shost->transportt); \
1320 val = simple_strtoul(buf, &cp, 0); \
1321 if (*cp && (*cp != '\n')) \
1323 i->f->set_host_##field(shost, val); \
1327 #define fc_host_store_str_function(field, slen) \
1329 store_fc_host_##field(struct device *dev, \
1330 struct device_attribute *attr, \
1331 const char *buf, size_t count) \
1333 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1334 struct fc_internal *i = to_fc_internal(shost->transportt); \
1335 unsigned int cnt=count; \
1337 /* count may include a LF at end of string */ \
1338 if (buf[cnt-1] == '\n') \
1340 if (cnt > ((slen) - 1)) \
1342 memcpy(fc_host_##field(shost), buf, cnt); \
1343 i->f->set_host_##field(shost); \
1347 #define fc_host_rd_attr(field, format_string, sz) \
1348 fc_host_show_function(field, format_string, sz, ) \
1349 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1350 show_fc_host_##field, NULL)
1352 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1353 fc_host_show_function(field, format_string, sz, (cast)) \
1354 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1355 show_fc_host_##field, NULL)
1357 #define fc_host_rw_attr(field, format_string, sz) \
1358 fc_host_show_function(field, format_string, sz, ) \
1359 fc_host_store_function(field) \
1360 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1361 show_fc_host_##field, \
1362 store_fc_host_##field)
1364 #define fc_host_rd_enum_attr(title, maxlen) \
1366 show_fc_host_##title (struct device *dev, \
1367 struct device_attribute *attr, char *buf) \
1369 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1370 struct fc_internal *i = to_fc_internal(shost->transportt); \
1372 if (i->f->get_host_##title) \
1373 i->f->get_host_##title(shost); \
1374 name = get_fc_##title##_name(fc_host_##title(shost)); \
1377 return snprintf(buf, maxlen, "%s\n", name); \
1379 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1381 #define SETUP_HOST_ATTRIBUTE_RD(field) \
1382 i->private_host_attrs[count] = device_attr_host_##field; \
1383 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1384 i->private_host_attrs[count].store = NULL; \
1385 i->host_attrs[count] = &i->private_host_attrs[count]; \
1386 if (i->f->show_host_##field) \
1389 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
1390 i->private_host_attrs[count] = device_attr_host_##field; \
1391 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1392 i->private_host_attrs[count].store = NULL; \
1393 i->host_attrs[count] = &i->private_host_attrs[count]; \
1396 #define SETUP_HOST_ATTRIBUTE_RW(field) \
1397 i->private_host_attrs[count] = device_attr_host_##field; \
1398 if (!i->f->set_host_##field) { \
1399 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1400 i->private_host_attrs[count].store = NULL; \
1402 i->host_attrs[count] = &i->private_host_attrs[count]; \
1403 if (i->f->show_host_##field) \
1407 #define fc_private_host_show_function(field, format_string, sz, cast) \
1409 show_fc_host_##field (struct device *dev, \
1410 struct device_attribute *attr, char *buf) \
1412 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1413 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1416 #define fc_private_host_rd_attr(field, format_string, sz) \
1417 fc_private_host_show_function(field, format_string, sz, ) \
1418 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1419 show_fc_host_##field, NULL)
1421 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1422 fc_private_host_show_function(field, format_string, sz, (cast)) \
1423 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1424 show_fc_host_##field, NULL)
1426 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
1427 i->private_host_attrs[count] = device_attr_host_##field; \
1428 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1429 i->private_host_attrs[count].store = NULL; \
1430 i->host_attrs[count] = &i->private_host_attrs[count]; \
1433 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
1435 i->private_host_attrs[count] = device_attr_host_##field; \
1436 i->host_attrs[count] = &i->private_host_attrs[count]; \
1441 /* Fixed Host Attributes */
1444 show_fc_host_supported_classes (struct device
*dev
,
1445 struct device_attribute
*attr
, char *buf
)
1447 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1449 if (fc_host_supported_classes(shost
) == FC_COS_UNSPECIFIED
)
1450 return snprintf(buf
, 20, "unspecified\n");
1452 return get_fc_cos_names(fc_host_supported_classes(shost
), buf
);
1454 static FC_DEVICE_ATTR(host
, supported_classes
, S_IRUGO
,
1455 show_fc_host_supported_classes
, NULL
);
1458 show_fc_host_supported_fc4s (struct device
*dev
,
1459 struct device_attribute
*attr
, char *buf
)
1461 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1462 return (ssize_t
)show_fc_fc4s(buf
, fc_host_supported_fc4s(shost
));
1464 static FC_DEVICE_ATTR(host
, supported_fc4s
, S_IRUGO
,
1465 show_fc_host_supported_fc4s
, NULL
);
1468 show_fc_host_supported_speeds (struct device
*dev
,
1469 struct device_attribute
*attr
, char *buf
)
1471 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1473 if (fc_host_supported_speeds(shost
) == FC_PORTSPEED_UNKNOWN
)
1474 return snprintf(buf
, 20, "unknown\n");
1476 return get_fc_port_speed_names(fc_host_supported_speeds(shost
), buf
);
1478 static FC_DEVICE_ATTR(host
, supported_speeds
, S_IRUGO
,
1479 show_fc_host_supported_speeds
, NULL
);
1482 fc_private_host_rd_attr_cast(node_name
, "0x%llx\n", 20, unsigned long long);
1483 fc_private_host_rd_attr_cast(port_name
, "0x%llx\n", 20, unsigned long long);
1484 fc_private_host_rd_attr_cast(permanent_port_name
, "0x%llx\n", 20,
1485 unsigned long long);
1486 fc_private_host_rd_attr(maxframe_size
, "%u bytes\n", 20);
1487 fc_private_host_rd_attr(max_npiv_vports
, "%u\n", 20);
1488 fc_private_host_rd_attr(serial_number
, "%s\n", (FC_SERIAL_NUMBER_SIZE
+1));
1491 /* Dynamic Host Attributes */
1494 show_fc_host_active_fc4s (struct device
*dev
,
1495 struct device_attribute
*attr
, char *buf
)
1497 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1498 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1500 if (i
->f
->get_host_active_fc4s
)
1501 i
->f
->get_host_active_fc4s(shost
);
1503 return (ssize_t
)show_fc_fc4s(buf
, fc_host_active_fc4s(shost
));
1505 static FC_DEVICE_ATTR(host
, active_fc4s
, S_IRUGO
,
1506 show_fc_host_active_fc4s
, NULL
);
1509 show_fc_host_speed (struct device
*dev
,
1510 struct device_attribute
*attr
, char *buf
)
1512 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1513 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1515 if (i
->f
->get_host_speed
)
1516 i
->f
->get_host_speed(shost
);
1518 if (fc_host_speed(shost
) == FC_PORTSPEED_UNKNOWN
)
1519 return snprintf(buf
, 20, "unknown\n");
1521 return get_fc_port_speed_names(fc_host_speed(shost
), buf
);
1523 static FC_DEVICE_ATTR(host
, speed
, S_IRUGO
,
1524 show_fc_host_speed
, NULL
);
1527 fc_host_rd_attr(port_id
, "0x%06x\n", 20);
1528 fc_host_rd_enum_attr(port_type
, FC_PORTTYPE_MAX_NAMELEN
);
1529 fc_host_rd_enum_attr(port_state
, FC_PORTSTATE_MAX_NAMELEN
);
1530 fc_host_rd_attr_cast(fabric_name
, "0x%llx\n", 20, unsigned long long);
1531 fc_host_rd_attr(symbolic_name
, "%s\n", FC_SYMBOLIC_NAME_SIZE
+ 1);
1533 fc_private_host_show_function(system_hostname
, "%s\n",
1534 FC_SYMBOLIC_NAME_SIZE
+ 1, )
1535 fc_host_store_str_function(system_hostname
, FC_SYMBOLIC_NAME_SIZE
)
1536 static FC_DEVICE_ATTR(host
, system_hostname
, S_IRUGO
| S_IWUSR
,
1537 show_fc_host_system_hostname
, store_fc_host_system_hostname
);
1540 /* Private Host Attributes */
1543 show_fc_private_host_tgtid_bind_type(struct device
*dev
,
1544 struct device_attribute
*attr
, char *buf
)
1546 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1549 name
= get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost
));
1552 return snprintf(buf
, FC_BINDTYPE_MAX_NAMELEN
, "%s\n", name
);
1555 #define get_list_head_entry(pos, head, member) \
1556 pos = list_entry((head)->next, typeof(*pos), member)
1559 store_fc_private_host_tgtid_bind_type(struct device
*dev
,
1560 struct device_attribute
*attr
, const char *buf
, size_t count
)
1562 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1563 struct fc_rport
*rport
;
1564 enum fc_tgtid_binding_type val
;
1565 unsigned long flags
;
1567 if (get_fc_tgtid_bind_type_match(buf
, &val
))
1570 /* if changing bind type, purge all unused consistent bindings */
1571 if (val
!= fc_host_tgtid_bind_type(shost
)) {
1572 spin_lock_irqsave(shost
->host_lock
, flags
);
1573 while (!list_empty(&fc_host_rport_bindings(shost
))) {
1574 get_list_head_entry(rport
,
1575 &fc_host_rport_bindings(shost
), peers
);
1576 list_del(&rport
->peers
);
1577 rport
->port_state
= FC_PORTSTATE_DELETED
;
1578 fc_queue_work(shost
, &rport
->rport_delete_work
);
1580 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1583 fc_host_tgtid_bind_type(shost
) = val
;
1587 static FC_DEVICE_ATTR(host
, tgtid_bind_type
, S_IRUGO
| S_IWUSR
,
1588 show_fc_private_host_tgtid_bind_type
,
1589 store_fc_private_host_tgtid_bind_type
);
1592 store_fc_private_host_issue_lip(struct device
*dev
,
1593 struct device_attribute
*attr
, const char *buf
, size_t count
)
1595 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1596 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1599 /* ignore any data value written to the attribute */
1600 if (i
->f
->issue_fc_host_lip
) {
1601 ret
= i
->f
->issue_fc_host_lip(shost
);
1602 return ret
? ret
: count
;
1608 static FC_DEVICE_ATTR(host
, issue_lip
, S_IWUSR
, NULL
,
1609 store_fc_private_host_issue_lip
);
1611 fc_private_host_rd_attr(npiv_vports_inuse
, "%u\n", 20);
1615 * Host Statistics Management
1618 /* Show a given an attribute in the statistics group */
1620 fc_stat_show(const struct device
*dev
, char *buf
, unsigned long offset
)
1622 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1623 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1624 struct fc_host_statistics
*stats
;
1625 ssize_t ret
= -ENOENT
;
1627 if (offset
> sizeof(struct fc_host_statistics
) ||
1628 offset
% sizeof(u64
) != 0)
1631 if (i
->f
->get_fc_host_stats
) {
1632 stats
= (i
->f
->get_fc_host_stats
)(shost
);
1634 ret
= snprintf(buf
, 20, "0x%llx\n",
1635 (unsigned long long)*(u64
*)(((u8
*) stats
) + offset
));
1641 /* generate a read-only statistics attribute */
1642 #define fc_host_statistic(name) \
1643 static ssize_t show_fcstat_##name(struct device *cd, \
1644 struct device_attribute *attr, \
1647 return fc_stat_show(cd, buf, \
1648 offsetof(struct fc_host_statistics, name)); \
1650 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1652 fc_host_statistic(seconds_since_last_reset
);
1653 fc_host_statistic(tx_frames
);
1654 fc_host_statistic(tx_words
);
1655 fc_host_statistic(rx_frames
);
1656 fc_host_statistic(rx_words
);
1657 fc_host_statistic(lip_count
);
1658 fc_host_statistic(nos_count
);
1659 fc_host_statistic(error_frames
);
1660 fc_host_statistic(dumped_frames
);
1661 fc_host_statistic(link_failure_count
);
1662 fc_host_statistic(loss_of_sync_count
);
1663 fc_host_statistic(loss_of_signal_count
);
1664 fc_host_statistic(prim_seq_protocol_err_count
);
1665 fc_host_statistic(invalid_tx_word_count
);
1666 fc_host_statistic(invalid_crc_count
);
1667 fc_host_statistic(fcp_input_requests
);
1668 fc_host_statistic(fcp_output_requests
);
1669 fc_host_statistic(fcp_control_requests
);
1670 fc_host_statistic(fcp_input_megabytes
);
1671 fc_host_statistic(fcp_output_megabytes
);
1674 fc_reset_statistics(struct device
*dev
, struct device_attribute
*attr
,
1675 const char *buf
, size_t count
)
1677 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1678 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1680 /* ignore any data value written to the attribute */
1681 if (i
->f
->reset_fc_host_stats
) {
1682 i
->f
->reset_fc_host_stats(shost
);
1688 static FC_DEVICE_ATTR(host
, reset_statistics
, S_IWUSR
, NULL
,
1689 fc_reset_statistics
);
1691 static struct attribute
*fc_statistics_attrs
[] = {
1692 &device_attr_host_seconds_since_last_reset
.attr
,
1693 &device_attr_host_tx_frames
.attr
,
1694 &device_attr_host_tx_words
.attr
,
1695 &device_attr_host_rx_frames
.attr
,
1696 &device_attr_host_rx_words
.attr
,
1697 &device_attr_host_lip_count
.attr
,
1698 &device_attr_host_nos_count
.attr
,
1699 &device_attr_host_error_frames
.attr
,
1700 &device_attr_host_dumped_frames
.attr
,
1701 &device_attr_host_link_failure_count
.attr
,
1702 &device_attr_host_loss_of_sync_count
.attr
,
1703 &device_attr_host_loss_of_signal_count
.attr
,
1704 &device_attr_host_prim_seq_protocol_err_count
.attr
,
1705 &device_attr_host_invalid_tx_word_count
.attr
,
1706 &device_attr_host_invalid_crc_count
.attr
,
1707 &device_attr_host_fcp_input_requests
.attr
,
1708 &device_attr_host_fcp_output_requests
.attr
,
1709 &device_attr_host_fcp_control_requests
.attr
,
1710 &device_attr_host_fcp_input_megabytes
.attr
,
1711 &device_attr_host_fcp_output_megabytes
.attr
,
1712 &device_attr_host_reset_statistics
.attr
,
1716 static struct attribute_group fc_statistics_group
= {
1717 .name
= "statistics",
1718 .attrs
= fc_statistics_attrs
,
1722 /* Host Vport Attributes */
1725 fc_parse_wwn(const char *ns
, u64
*nm
)
1730 memset(wwn
, 0, sizeof(wwn
));
1732 /* Validate and store the new name */
1733 for (i
=0, j
=0; i
< 16; i
++) {
1736 value
= hex_to_bin(*ns
++);
1738 j
= (j
<< 4) | value
;
1742 wwn
[i
/2] = j
& 0xff;
1747 *nm
= wwn_to_u64(wwn
);
1754 * "Short-cut" sysfs variable to create a new vport on a FC Host.
1755 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1756 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1757 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1760 store_fc_host_vport_create(struct device
*dev
, struct device_attribute
*attr
,
1761 const char *buf
, size_t count
)
1763 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1764 struct fc_vport_identifiers vid
;
1765 struct fc_vport
*vport
;
1766 unsigned int cnt
=count
;
1769 memset(&vid
, 0, sizeof(vid
));
1771 /* count may include a LF at end of string */
1772 if (buf
[cnt
-1] == '\n')
1775 /* validate we have enough characters for WWPN */
1776 if ((cnt
!= (16+1+16)) || (buf
[16] != ':'))
1779 stat
= fc_parse_wwn(&buf
[0], &vid
.port_name
);
1783 stat
= fc_parse_wwn(&buf
[17], &vid
.node_name
);
1787 vid
.roles
= FC_PORT_ROLE_FCP_INITIATOR
;
1788 vid
.vport_type
= FC_PORTTYPE_NPIV
;
1789 /* vid.symbolic_name is already zero/NULL's */
1790 vid
.disable
= false; /* always enabled */
1792 /* we only allow support on Channel 0 !!! */
1793 stat
= fc_vport_setup(shost
, 0, &shost
->shost_gendev
, &vid
, &vport
);
1794 return stat
? stat
: count
;
1796 static FC_DEVICE_ATTR(host
, vport_create
, S_IWUSR
, NULL
,
1797 store_fc_host_vport_create
);
1801 * "Short-cut" sysfs variable to delete a vport on a FC Host.
1802 * Vport is identified by a string containing "<WWPN>:<WWNN>".
1803 * The WWNs are specified as hex characters, and may *not* contain
1804 * any prefixes (e.g. 0x, x, etc)
1807 store_fc_host_vport_delete(struct device
*dev
, struct device_attribute
*attr
,
1808 const char *buf
, size_t count
)
1810 struct Scsi_Host
*shost
= transport_class_to_shost(dev
);
1811 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
1812 struct fc_vport
*vport
;
1814 unsigned long flags
;
1815 unsigned int cnt
=count
;
1818 /* count may include a LF at end of string */
1819 if (buf
[cnt
-1] == '\n')
1822 /* validate we have enough characters for WWPN */
1823 if ((cnt
!= (16+1+16)) || (buf
[16] != ':'))
1826 stat
= fc_parse_wwn(&buf
[0], &wwpn
);
1830 stat
= fc_parse_wwn(&buf
[17], &wwnn
);
1834 spin_lock_irqsave(shost
->host_lock
, flags
);
1836 /* we only allow support on Channel 0 !!! */
1837 list_for_each_entry(vport
, &fc_host
->vports
, peers
) {
1838 if ((vport
->channel
== 0) &&
1839 (vport
->port_name
== wwpn
) && (vport
->node_name
== wwnn
)) {
1840 if (vport
->flags
& (FC_VPORT_DEL
| FC_VPORT_CREATING
))
1842 vport
->flags
|= FC_VPORT_DELETING
;
1847 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1852 stat
= fc_vport_terminate(vport
);
1853 return stat
? stat
: count
;
1855 static FC_DEVICE_ATTR(host
, vport_delete
, S_IWUSR
, NULL
,
1856 store_fc_host_vport_delete
);
1859 static int fc_host_match(struct attribute_container
*cont
,
1862 struct Scsi_Host
*shost
;
1863 struct fc_internal
*i
;
1865 if (!scsi_is_host_device(dev
))
1868 shost
= dev_to_shost(dev
);
1869 if (!shost
->transportt
|| shost
->transportt
->host_attrs
.ac
.class
1870 != &fc_host_class
.class)
1873 i
= to_fc_internal(shost
->transportt
);
1875 return &i
->t
.host_attrs
.ac
== cont
;
1878 static int fc_target_match(struct attribute_container
*cont
,
1881 struct Scsi_Host
*shost
;
1882 struct fc_internal
*i
;
1884 if (!scsi_is_target_device(dev
))
1887 shost
= dev_to_shost(dev
->parent
);
1888 if (!shost
->transportt
|| shost
->transportt
->host_attrs
.ac
.class
1889 != &fc_host_class
.class)
1892 i
= to_fc_internal(shost
->transportt
);
1894 return &i
->t
.target_attrs
.ac
== cont
;
1897 static void fc_rport_dev_release(struct device
*dev
)
1899 struct fc_rport
*rport
= dev_to_rport(dev
);
1900 put_device(dev
->parent
);
1904 int scsi_is_fc_rport(const struct device
*dev
)
1906 return dev
->release
== fc_rport_dev_release
;
1908 EXPORT_SYMBOL(scsi_is_fc_rport
);
1910 static int fc_rport_match(struct attribute_container
*cont
,
1913 struct Scsi_Host
*shost
;
1914 struct fc_internal
*i
;
1916 if (!scsi_is_fc_rport(dev
))
1919 shost
= dev_to_shost(dev
->parent
);
1920 if (!shost
->transportt
|| shost
->transportt
->host_attrs
.ac
.class
1921 != &fc_host_class
.class)
1924 i
= to_fc_internal(shost
->transportt
);
1926 return &i
->rport_attr_cont
.ac
== cont
;
1930 static void fc_vport_dev_release(struct device
*dev
)
1932 struct fc_vport
*vport
= dev_to_vport(dev
);
1933 put_device(dev
->parent
); /* release kobj parent */
1937 int scsi_is_fc_vport(const struct device
*dev
)
1939 return dev
->release
== fc_vport_dev_release
;
1941 EXPORT_SYMBOL(scsi_is_fc_vport
);
1943 static int fc_vport_match(struct attribute_container
*cont
,
1946 struct fc_vport
*vport
;
1947 struct Scsi_Host
*shost
;
1948 struct fc_internal
*i
;
1950 if (!scsi_is_fc_vport(dev
))
1952 vport
= dev_to_vport(dev
);
1954 shost
= vport_to_shost(vport
);
1955 if (!shost
->transportt
|| shost
->transportt
->host_attrs
.ac
.class
1956 != &fc_host_class
.class)
1959 i
= to_fc_internal(shost
->transportt
);
1960 return &i
->vport_attr_cont
.ac
== cont
;
1965 * fc_timed_out - FC Transport I/O timeout intercept handler
1966 * @scmd: The SCSI command which timed out
1968 * This routine protects against error handlers getting invoked while a
1969 * rport is in a blocked state, typically due to a temporarily loss of
1970 * connectivity. If the error handlers are allowed to proceed, requests
1971 * to abort i/o, reset the target, etc will likely fail as there is no way
1972 * to communicate with the device to perform the requested function. These
1973 * failures may result in the midlayer taking the device offline, requiring
1974 * manual intervention to restore operation.
1976 * This routine, called whenever an i/o times out, validates the state of
1977 * the underlying rport. If the rport is blocked, it returns
1978 * EH_RESET_TIMER, which will continue to reschedule the timeout.
1979 * Eventually, either the device will return, or devloss_tmo will fire,
1980 * and when the timeout then fires, it will be handled normally.
1981 * If the rport is not blocked, normal error handling continues.
1984 * This routine assumes no locks are held on entry.
1986 static enum blk_eh_timer_return
1987 fc_timed_out(struct scsi_cmnd
*scmd
)
1989 struct fc_rport
*rport
= starget_to_rport(scsi_target(scmd
->device
));
1991 if (rport
->port_state
== FC_PORTSTATE_BLOCKED
)
1992 return BLK_EH_RESET_TIMER
;
1994 return BLK_EH_NOT_HANDLED
;
1998 * Called by fc_user_scan to locate an rport on the shost that
1999 * matches the channel and target id, and invoke scsi_scan_target()
2003 fc_user_scan_tgt(struct Scsi_Host
*shost
, uint channel
, uint id
, uint lun
)
2005 struct fc_rport
*rport
;
2006 unsigned long flags
;
2008 spin_lock_irqsave(shost
->host_lock
, flags
);
2010 list_for_each_entry(rport
, &fc_host_rports(shost
), peers
) {
2011 if (rport
->scsi_target_id
== -1)
2014 if (rport
->port_state
!= FC_PORTSTATE_ONLINE
)
2017 if ((channel
== rport
->channel
) &&
2018 (id
== rport
->scsi_target_id
)) {
2019 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2020 scsi_scan_target(&rport
->dev
, channel
, id
, lun
, 1);
2025 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2029 * Called via sysfs scan routines. Necessary, as the FC transport
2030 * wants to place all target objects below the rport object. So this
2031 * routine must invoke the scsi_scan_target() routine with the rport
2032 * object as the parent.
2035 fc_user_scan(struct Scsi_Host
*shost
, uint channel
, uint id
, uint lun
)
2040 if (((channel
!= SCAN_WILD_CARD
) && (channel
> shost
->max_channel
)) ||
2041 ((id
!= SCAN_WILD_CARD
) && (id
>= shost
->max_id
)) ||
2042 ((lun
!= SCAN_WILD_CARD
) && (lun
> shost
->max_lun
)))
2045 if (channel
== SCAN_WILD_CARD
) {
2047 chhi
= shost
->max_channel
+ 1;
2053 if (id
== SCAN_WILD_CARD
) {
2055 tgthi
= shost
->max_id
;
2061 for ( ; chlo
< chhi
; chlo
++)
2062 for ( ; tgtlo
< tgthi
; tgtlo
++)
2063 fc_user_scan_tgt(shost
, chlo
, tgtlo
, lun
);
2068 static int fc_tsk_mgmt_response(struct Scsi_Host
*shost
, u64 nexus
, u64 tm_id
,
2071 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
2072 return i
->f
->tsk_mgmt_response(shost
, nexus
, tm_id
, result
);
2075 static int fc_it_nexus_response(struct Scsi_Host
*shost
, u64 nexus
, int result
)
2077 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
2078 return i
->f
->it_nexus_response(shost
, nexus
, result
);
2081 struct scsi_transport_template
*
2082 fc_attach_transport(struct fc_function_template
*ft
)
2085 struct fc_internal
*i
= kzalloc(sizeof(struct fc_internal
),
2091 i
->t
.target_attrs
.ac
.attrs
= &i
->starget_attrs
[0];
2092 i
->t
.target_attrs
.ac
.class = &fc_transport_class
.class;
2093 i
->t
.target_attrs
.ac
.match
= fc_target_match
;
2094 i
->t
.target_size
= sizeof(struct fc_starget_attrs
);
2095 transport_container_register(&i
->t
.target_attrs
);
2097 i
->t
.host_attrs
.ac
.attrs
= &i
->host_attrs
[0];
2098 i
->t
.host_attrs
.ac
.class = &fc_host_class
.class;
2099 i
->t
.host_attrs
.ac
.match
= fc_host_match
;
2100 i
->t
.host_size
= sizeof(struct fc_host_attrs
);
2101 if (ft
->get_fc_host_stats
)
2102 i
->t
.host_attrs
.statistics
= &fc_statistics_group
;
2103 transport_container_register(&i
->t
.host_attrs
);
2105 i
->rport_attr_cont
.ac
.attrs
= &i
->rport_attrs
[0];
2106 i
->rport_attr_cont
.ac
.class = &fc_rport_class
.class;
2107 i
->rport_attr_cont
.ac
.match
= fc_rport_match
;
2108 transport_container_register(&i
->rport_attr_cont
);
2110 i
->vport_attr_cont
.ac
.attrs
= &i
->vport_attrs
[0];
2111 i
->vport_attr_cont
.ac
.class = &fc_vport_class
.class;
2112 i
->vport_attr_cont
.ac
.match
= fc_vport_match
;
2113 transport_container_register(&i
->vport_attr_cont
);
2117 /* Transport uses the shost workq for scsi scanning */
2118 i
->t
.create_work_queue
= 1;
2120 i
->t
.eh_timed_out
= fc_timed_out
;
2122 i
->t
.user_scan
= fc_user_scan
;
2124 /* target-mode drivers' functions */
2125 i
->t
.tsk_mgmt_response
= fc_tsk_mgmt_response
;
2126 i
->t
.it_nexus_response
= fc_it_nexus_response
;
2129 * Setup SCSI Target Attributes.
2132 SETUP_STARGET_ATTRIBUTE_RD(node_name
);
2133 SETUP_STARGET_ATTRIBUTE_RD(port_name
);
2134 SETUP_STARGET_ATTRIBUTE_RD(port_id
);
2136 BUG_ON(count
> FC_STARGET_NUM_ATTRS
);
2138 i
->starget_attrs
[count
] = NULL
;
2142 * Setup SCSI Host Attributes.
2145 SETUP_HOST_ATTRIBUTE_RD(node_name
);
2146 SETUP_HOST_ATTRIBUTE_RD(port_name
);
2147 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name
);
2148 SETUP_HOST_ATTRIBUTE_RD(supported_classes
);
2149 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s
);
2150 SETUP_HOST_ATTRIBUTE_RD(supported_speeds
);
2151 SETUP_HOST_ATTRIBUTE_RD(maxframe_size
);
2152 if (ft
->vport_create
) {
2153 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports
);
2154 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse
);
2156 SETUP_HOST_ATTRIBUTE_RD(serial_number
);
2158 SETUP_HOST_ATTRIBUTE_RD(port_id
);
2159 SETUP_HOST_ATTRIBUTE_RD(port_type
);
2160 SETUP_HOST_ATTRIBUTE_RD(port_state
);
2161 SETUP_HOST_ATTRIBUTE_RD(active_fc4s
);
2162 SETUP_HOST_ATTRIBUTE_RD(speed
);
2163 SETUP_HOST_ATTRIBUTE_RD(fabric_name
);
2164 SETUP_HOST_ATTRIBUTE_RD(symbolic_name
);
2165 SETUP_HOST_ATTRIBUTE_RW(system_hostname
);
2167 /* Transport-managed attributes */
2168 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type
);
2169 if (ft
->issue_fc_host_lip
)
2170 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip
);
2171 if (ft
->vport_create
)
2172 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create
);
2173 if (ft
->vport_delete
)
2174 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete
);
2176 BUG_ON(count
> FC_HOST_NUM_ATTRS
);
2178 i
->host_attrs
[count
] = NULL
;
2181 * Setup Remote Port Attributes.
2184 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size
);
2185 SETUP_RPORT_ATTRIBUTE_RD(supported_classes
);
2186 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo
);
2187 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name
);
2188 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name
);
2189 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id
);
2190 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles
);
2191 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state
);
2192 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id
);
2193 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo
);
2195 BUG_ON(count
> FC_RPORT_NUM_ATTRS
);
2197 i
->rport_attrs
[count
] = NULL
;
2200 * Setup Virtual Port Attributes.
2203 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state
);
2204 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state
);
2205 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name
);
2206 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name
);
2207 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles
);
2208 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type
);
2209 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name
);
2210 SETUP_VPORT_ATTRIBUTE_WR(vport_delete
);
2211 SETUP_VPORT_ATTRIBUTE_WR(vport_disable
);
2213 BUG_ON(count
> FC_VPORT_NUM_ATTRS
);
2215 i
->vport_attrs
[count
] = NULL
;
2219 EXPORT_SYMBOL(fc_attach_transport
);
2221 void fc_release_transport(struct scsi_transport_template
*t
)
2223 struct fc_internal
*i
= to_fc_internal(t
);
2225 transport_container_unregister(&i
->t
.target_attrs
);
2226 transport_container_unregister(&i
->t
.host_attrs
);
2227 transport_container_unregister(&i
->rport_attr_cont
);
2228 transport_container_unregister(&i
->vport_attr_cont
);
2232 EXPORT_SYMBOL(fc_release_transport
);
2235 * fc_queue_work - Queue work to the fc_host workqueue.
2236 * @shost: Pointer to Scsi_Host bound to fc_host.
2237 * @work: Work to queue for execution.
2240 * 1 - work queued for execution
2241 * 0 - work is already queued
2242 * -EINVAL - work queue doesn't exist
2245 fc_queue_work(struct Scsi_Host
*shost
, struct work_struct
*work
)
2247 if (unlikely(!fc_host_work_q(shost
))) {
2249 "ERROR: FC host '%s' attempted to queue work, "
2250 "when no workqueue created.\n", shost
->hostt
->name
);
2256 return queue_work(fc_host_work_q(shost
), work
);
2260 * fc_flush_work - Flush a fc_host's workqueue.
2261 * @shost: Pointer to Scsi_Host bound to fc_host.
2264 fc_flush_work(struct Scsi_Host
*shost
)
2266 if (!fc_host_work_q(shost
)) {
2268 "ERROR: FC host '%s' attempted to flush work, "
2269 "when no workqueue created.\n", shost
->hostt
->name
);
2274 flush_workqueue(fc_host_work_q(shost
));
2278 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2279 * @shost: Pointer to Scsi_Host bound to fc_host.
2280 * @work: Work to queue for execution.
2281 * @delay: jiffies to delay the work queuing
2284 * 1 on success / 0 already queued / < 0 for error
2287 fc_queue_devloss_work(struct Scsi_Host
*shost
, struct delayed_work
*work
,
2288 unsigned long delay
)
2290 if (unlikely(!fc_host_devloss_work_q(shost
))) {
2292 "ERROR: FC host '%s' attempted to queue work, "
2293 "when no workqueue created.\n", shost
->hostt
->name
);
2299 return queue_delayed_work(fc_host_devloss_work_q(shost
), work
, delay
);
2303 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2304 * @shost: Pointer to Scsi_Host bound to fc_host.
2307 fc_flush_devloss(struct Scsi_Host
*shost
)
2309 if (!fc_host_devloss_work_q(shost
)) {
2311 "ERROR: FC host '%s' attempted to flush work, "
2312 "when no workqueue created.\n", shost
->hostt
->name
);
2317 flush_workqueue(fc_host_devloss_work_q(shost
));
2322 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2323 * @shost: Which &Scsi_Host
2325 * This routine is expected to be called immediately preceeding the
2326 * a driver's call to scsi_remove_host().
2328 * WARNING: A driver utilizing the fc_transport, which fails to call
2329 * this routine prior to scsi_remove_host(), will leave dangling
2330 * objects in /sys/class/fc_remote_ports. Access to any of these
2331 * objects can result in a system crash !!!
2334 * This routine assumes no locks are held on entry.
2337 fc_remove_host(struct Scsi_Host
*shost
)
2339 struct fc_vport
*vport
= NULL
, *next_vport
= NULL
;
2340 struct fc_rport
*rport
= NULL
, *next_rport
= NULL
;
2341 struct workqueue_struct
*work_q
;
2342 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
2343 unsigned long flags
;
2345 spin_lock_irqsave(shost
->host_lock
, flags
);
2347 /* Remove any vports */
2348 list_for_each_entry_safe(vport
, next_vport
, &fc_host
->vports
, peers
)
2349 fc_queue_work(shost
, &vport
->vport_delete_work
);
2351 /* Remove any remote ports */
2352 list_for_each_entry_safe(rport
, next_rport
,
2353 &fc_host
->rports
, peers
) {
2354 list_del(&rport
->peers
);
2355 rport
->port_state
= FC_PORTSTATE_DELETED
;
2356 fc_queue_work(shost
, &rport
->rport_delete_work
);
2359 list_for_each_entry_safe(rport
, next_rport
,
2360 &fc_host
->rport_bindings
, peers
) {
2361 list_del(&rport
->peers
);
2362 rport
->port_state
= FC_PORTSTATE_DELETED
;
2363 fc_queue_work(shost
, &rport
->rport_delete_work
);
2366 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2368 /* flush all scan work items */
2369 scsi_flush_work(shost
);
2371 /* flush all stgt delete, and rport delete work items, then kill it */
2372 if (fc_host
->work_q
) {
2373 work_q
= fc_host
->work_q
;
2374 fc_host
->work_q
= NULL
;
2375 destroy_workqueue(work_q
);
2378 /* flush all devloss work items, then kill it */
2379 if (fc_host
->devloss_work_q
) {
2380 work_q
= fc_host
->devloss_work_q
;
2381 fc_host
->devloss_work_q
= NULL
;
2382 destroy_workqueue(work_q
);
2385 EXPORT_SYMBOL(fc_remove_host
);
2387 static void fc_terminate_rport_io(struct fc_rport
*rport
)
2389 struct Scsi_Host
*shost
= rport_to_shost(rport
);
2390 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
2392 /* Involve the LLDD if possible to terminate all io on the rport. */
2393 if (i
->f
->terminate_rport_io
)
2394 i
->f
->terminate_rport_io(rport
);
2397 * must unblock to flush queued IO. The caller will have set
2398 * the port_state or flags, so that fc_remote_port_chkready will
2401 scsi_target_unblock(&rport
->dev
);
2405 * fc_starget_delete - called to delete the scsi decendents of an rport
2406 * @work: remote port to be operated on.
2408 * Deletes target and all sdevs.
2411 fc_starget_delete(struct work_struct
*work
)
2413 struct fc_rport
*rport
=
2414 container_of(work
, struct fc_rport
, stgt_delete_work
);
2416 fc_terminate_rport_io(rport
);
2417 scsi_remove_target(&rport
->dev
);
2422 * fc_rport_final_delete - finish rport termination and delete it.
2423 * @work: remote port to be deleted.
2426 fc_rport_final_delete(struct work_struct
*work
)
2428 struct fc_rport
*rport
=
2429 container_of(work
, struct fc_rport
, rport_delete_work
);
2430 struct device
*dev
= &rport
->dev
;
2431 struct Scsi_Host
*shost
= rport_to_shost(rport
);
2432 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
2433 unsigned long flags
;
2434 int do_callback
= 0;
2437 * if a scan is pending, flush the SCSI Host work_q so that
2438 * that we can reclaim the rport scan work element.
2440 if (rport
->flags
& FC_RPORT_SCAN_PENDING
)
2441 scsi_flush_work(shost
);
2443 fc_terminate_rport_io(rport
);
2446 * Cancel any outstanding timers. These should really exist
2447 * only when rmmod'ing the LLDD and we're asking for
2448 * immediate termination of the rports
2450 spin_lock_irqsave(shost
->host_lock
, flags
);
2451 if (rport
->flags
& FC_RPORT_DEVLOSS_PENDING
) {
2452 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2453 if (!cancel_delayed_work(&rport
->fail_io_work
))
2454 fc_flush_devloss(shost
);
2455 if (!cancel_delayed_work(&rport
->dev_loss_work
))
2456 fc_flush_devloss(shost
);
2457 spin_lock_irqsave(shost
->host_lock
, flags
);
2458 rport
->flags
&= ~FC_RPORT_DEVLOSS_PENDING
;
2460 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2462 /* Delete SCSI target and sdevs */
2463 if (rport
->scsi_target_id
!= -1)
2464 fc_starget_delete(&rport
->stgt_delete_work
);
2467 * Notify the driver that the rport is now dead. The LLDD will
2468 * also guarantee that any communication to the rport is terminated
2470 * Avoid this call if we already called it when we preserved the
2471 * rport for the binding.
2473 spin_lock_irqsave(shost
->host_lock
, flags
);
2474 if (!(rport
->flags
& FC_RPORT_DEVLOSS_CALLBK_DONE
) &&
2475 (i
->f
->dev_loss_tmo_callbk
)) {
2476 rport
->flags
|= FC_RPORT_DEVLOSS_CALLBK_DONE
;
2479 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2482 i
->f
->dev_loss_tmo_callbk(rport
);
2484 fc_bsg_remove(rport
->rqst_q
);
2486 transport_remove_device(dev
);
2488 transport_destroy_device(dev
);
2489 put_device(&shost
->shost_gendev
); /* for fc_host->rport list */
2490 put_device(dev
); /* for self-reference */
2495 * fc_rport_create - allocates and creates a remote FC port.
2496 * @shost: scsi host the remote port is connected to.
2497 * @channel: Channel on shost port connected to.
2498 * @ids: The world wide names, fc address, and FC4 port
2499 * roles for the remote port.
2501 * Allocates and creates the remoter port structure, including the
2502 * class and sysfs creation.
2505 * This routine assumes no locks are held on entry.
2507 static struct fc_rport
*
2508 fc_rport_create(struct Scsi_Host
*shost
, int channel
,
2509 struct fc_rport_identifiers
*ids
)
2511 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
2512 struct fc_internal
*fci
= to_fc_internal(shost
->transportt
);
2513 struct fc_rport
*rport
;
2515 unsigned long flags
;
2519 size
= (sizeof(struct fc_rport
) + fci
->f
->dd_fcrport_size
);
2520 rport
= kzalloc(size
, GFP_KERNEL
);
2521 if (unlikely(!rport
)) {
2522 printk(KERN_ERR
"%s: allocation failure\n", __func__
);
2526 rport
->maxframe_size
= -1;
2527 rport
->supported_classes
= FC_COS_UNSPECIFIED
;
2528 rport
->dev_loss_tmo
= fc_dev_loss_tmo
;
2529 memcpy(&rport
->node_name
, &ids
->node_name
, sizeof(rport
->node_name
));
2530 memcpy(&rport
->port_name
, &ids
->port_name
, sizeof(rport
->port_name
));
2531 rport
->port_id
= ids
->port_id
;
2532 rport
->roles
= ids
->roles
;
2533 rport
->port_state
= FC_PORTSTATE_ONLINE
;
2534 if (fci
->f
->dd_fcrport_size
)
2535 rport
->dd_data
= &rport
[1];
2536 rport
->channel
= channel
;
2537 rport
->fast_io_fail_tmo
= -1;
2539 INIT_DELAYED_WORK(&rport
->dev_loss_work
, fc_timeout_deleted_rport
);
2540 INIT_DELAYED_WORK(&rport
->fail_io_work
, fc_timeout_fail_rport_io
);
2541 INIT_WORK(&rport
->scan_work
, fc_scsi_scan_rport
);
2542 INIT_WORK(&rport
->stgt_delete_work
, fc_starget_delete
);
2543 INIT_WORK(&rport
->rport_delete_work
, fc_rport_final_delete
);
2545 spin_lock_irqsave(shost
->host_lock
, flags
);
2547 rport
->number
= fc_host
->next_rport_number
++;
2548 if (rport
->roles
& FC_PORT_ROLE_FCP_TARGET
)
2549 rport
->scsi_target_id
= fc_host
->next_target_id
++;
2551 rport
->scsi_target_id
= -1;
2552 list_add_tail(&rport
->peers
, &fc_host
->rports
);
2553 get_device(&shost
->shost_gendev
); /* for fc_host->rport list */
2555 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2558 device_initialize(dev
); /* takes self reference */
2559 dev
->parent
= get_device(&shost
->shost_gendev
); /* parent reference */
2560 dev
->release
= fc_rport_dev_release
;
2561 dev_set_name(dev
, "rport-%d:%d-%d",
2562 shost
->host_no
, channel
, rport
->number
);
2563 transport_setup_device(dev
);
2565 error
= device_add(dev
);
2567 printk(KERN_ERR
"FC Remote Port device_add failed\n");
2570 transport_add_device(dev
);
2571 transport_configure_device(dev
);
2573 fc_bsg_rportadd(shost
, rport
);
2574 /* ignore any bsg add error - we just can't do sgio */
2576 if (rport
->roles
& FC_PORT_ROLE_FCP_TARGET
) {
2577 /* initiate a scan of the target */
2578 rport
->flags
|= FC_RPORT_SCAN_PENDING
;
2579 scsi_queue_work(shost
, &rport
->scan_work
);
2585 transport_destroy_device(dev
);
2586 spin_lock_irqsave(shost
->host_lock
, flags
);
2587 list_del(&rport
->peers
);
2588 put_device(&shost
->shost_gendev
); /* for fc_host->rport list */
2589 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2590 put_device(dev
->parent
);
2596 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
2597 * @shost: scsi host the remote port is connected to.
2598 * @channel: Channel on shost port connected to.
2599 * @ids: The world wide names, fc address, and FC4 port
2600 * roles for the remote port.
2602 * The LLDD calls this routine to notify the transport of the existence
2603 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2604 * of the port, it's FC address (port_id), and the FC4 roles that are
2605 * active for the port.
2607 * For ports that are FCP targets (aka scsi targets), the FC transport
2608 * maintains consistent target id bindings on behalf of the LLDD.
2609 * A consistent target id binding is an assignment of a target id to
2610 * a remote port identifier, which persists while the scsi host is
2611 * attached. The remote port can disappear, then later reappear, and
2612 * it's target id assignment remains the same. This allows for shifts
2613 * in FC addressing (if binding by wwpn or wwnn) with no apparent
2614 * changes to the scsi subsystem which is based on scsi host number and
2615 * target id values. Bindings are only valid during the attachment of
2616 * the scsi host. If the host detaches, then later re-attaches, target
2617 * id bindings may change.
2619 * This routine is responsible for returning a remote port structure.
2620 * The routine will search the list of remote ports it maintains
2621 * internally on behalf of consistent target id mappings. If found, the
2622 * remote port structure will be reused. Otherwise, a new remote port
2623 * structure will be allocated.
2625 * Whenever a remote port is allocated, a new fc_remote_port class
2626 * device is created.
2628 * Should not be called from interrupt context.
2631 * This routine assumes no locks are held on entry.
2634 fc_remote_port_add(struct Scsi_Host
*shost
, int channel
,
2635 struct fc_rport_identifiers
*ids
)
2637 struct fc_internal
*fci
= to_fc_internal(shost
->transportt
);
2638 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
2639 struct fc_rport
*rport
;
2640 unsigned long flags
;
2643 /* ensure any stgt delete functions are done */
2644 fc_flush_work(shost
);
2647 * Search the list of "active" rports, for an rport that has been
2648 * deleted, but we've held off the real delete while the target
2649 * is in a "blocked" state.
2651 spin_lock_irqsave(shost
->host_lock
, flags
);
2653 list_for_each_entry(rport
, &fc_host
->rports
, peers
) {
2655 if ((rport
->port_state
== FC_PORTSTATE_BLOCKED
) &&
2656 (rport
->channel
== channel
)) {
2658 switch (fc_host
->tgtid_bind_type
) {
2659 case FC_TGTID_BIND_BY_WWPN
:
2660 case FC_TGTID_BIND_NONE
:
2661 if (rport
->port_name
== ids
->port_name
)
2664 case FC_TGTID_BIND_BY_WWNN
:
2665 if (rport
->node_name
== ids
->node_name
)
2668 case FC_TGTID_BIND_BY_ID
:
2669 if (rport
->port_id
== ids
->port_id
)
2676 memcpy(&rport
->node_name
, &ids
->node_name
,
2677 sizeof(rport
->node_name
));
2678 memcpy(&rport
->port_name
, &ids
->port_name
,
2679 sizeof(rport
->port_name
));
2680 rport
->port_id
= ids
->port_id
;
2682 rport
->port_state
= FC_PORTSTATE_ONLINE
;
2683 rport
->roles
= ids
->roles
;
2685 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2687 if (fci
->f
->dd_fcrport_size
)
2688 memset(rport
->dd_data
, 0,
2689 fci
->f
->dd_fcrport_size
);
2692 * If we were not a target, cancel the
2693 * io terminate and rport timers, and
2696 * If we were a target, but our new role
2697 * doesn't indicate a target, leave the
2698 * timers running expecting the role to
2699 * change as the target fully logs in. If
2700 * it doesn't, the target will be torn down.
2702 * If we were a target, and our role shows
2703 * we're still a target, cancel the timers
2704 * and kick off a scan.
2707 /* was a target, not in roles */
2708 if ((rport
->scsi_target_id
!= -1) &&
2709 (!(ids
->roles
& FC_PORT_ROLE_FCP_TARGET
)))
2713 * Stop the fail io and dev_loss timers.
2714 * If they flush, the port_state will
2715 * be checked and will NOOP the function.
2717 if (!cancel_delayed_work(&rport
->fail_io_work
))
2718 fc_flush_devloss(shost
);
2719 if (!cancel_delayed_work(&rport
->dev_loss_work
))
2720 fc_flush_devloss(shost
);
2722 spin_lock_irqsave(shost
->host_lock
, flags
);
2724 rport
->flags
&= ~(FC_RPORT_FAST_FAIL_TIMEDOUT
|
2725 FC_RPORT_DEVLOSS_PENDING
|
2726 FC_RPORT_DEVLOSS_CALLBK_DONE
);
2728 /* if target, initiate a scan */
2729 if (rport
->scsi_target_id
!= -1) {
2730 rport
->flags
|= FC_RPORT_SCAN_PENDING
;
2731 scsi_queue_work(shost
,
2733 spin_unlock_irqrestore(shost
->host_lock
,
2735 scsi_target_unblock(&rport
->dev
);
2737 spin_unlock_irqrestore(shost
->host_lock
,
2740 fc_bsg_goose_queue(rport
);
2748 * Search the bindings array
2749 * Note: if never a FCP target, you won't be on this list
2751 if (fc_host
->tgtid_bind_type
!= FC_TGTID_BIND_NONE
) {
2753 /* search for a matching consistent binding */
2755 list_for_each_entry(rport
, &fc_host
->rport_bindings
,
2757 if (rport
->channel
!= channel
)
2760 switch (fc_host
->tgtid_bind_type
) {
2761 case FC_TGTID_BIND_BY_WWPN
:
2762 if (rport
->port_name
== ids
->port_name
)
2765 case FC_TGTID_BIND_BY_WWNN
:
2766 if (rport
->node_name
== ids
->node_name
)
2769 case FC_TGTID_BIND_BY_ID
:
2770 if (rport
->port_id
== ids
->port_id
)
2773 case FC_TGTID_BIND_NONE
: /* to keep compiler happy */
2778 list_move_tail(&rport
->peers
, &fc_host
->rports
);
2784 memcpy(&rport
->node_name
, &ids
->node_name
,
2785 sizeof(rport
->node_name
));
2786 memcpy(&rport
->port_name
, &ids
->port_name
,
2787 sizeof(rport
->port_name
));
2788 rport
->port_id
= ids
->port_id
;
2789 rport
->roles
= ids
->roles
;
2790 rport
->port_state
= FC_PORTSTATE_ONLINE
;
2791 rport
->flags
&= ~FC_RPORT_FAST_FAIL_TIMEDOUT
;
2793 if (fci
->f
->dd_fcrport_size
)
2794 memset(rport
->dd_data
, 0,
2795 fci
->f
->dd_fcrport_size
);
2797 if (rport
->roles
& FC_PORT_ROLE_FCP_TARGET
) {
2798 /* initiate a scan of the target */
2799 rport
->flags
|= FC_RPORT_SCAN_PENDING
;
2800 scsi_queue_work(shost
, &rport
->scan_work
);
2801 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2802 scsi_target_unblock(&rport
->dev
);
2804 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2810 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2812 /* No consistent binding found - create new remote port entry */
2813 rport
= fc_rport_create(shost
, channel
, ids
);
2817 EXPORT_SYMBOL(fc_remote_port_add
);
2821 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
2822 * @rport: The remote port that no longer exists
2824 * The LLDD calls this routine to notify the transport that a remote
2825 * port is no longer part of the topology. Note: Although a port
2826 * may no longer be part of the topology, it may persist in the remote
2827 * ports displayed by the fc_host. We do this under 2 conditions:
2828 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
2829 * This allows the port to temporarily disappear, then reappear without
2830 * disrupting the SCSI device tree attached to it. During the "blocked"
2831 * period the port will still exist.
2832 * 2) If the port was a scsi target and disappears for longer than we
2833 * expect, we'll delete the port and the tear down the SCSI device tree
2834 * attached to it. However, we want to semi-persist the target id assigned
2835 * to that port if it eventually does exist. The port structure will
2836 * remain (although with minimal information) so that the target id
2839 * If the remote port is not an FCP Target, it will be fully torn down
2840 * and deallocated, including the fc_remote_port class device.
2842 * If the remote port is an FCP Target, the port will be placed in a
2843 * temporary blocked state. From the LLDD's perspective, the rport no
2844 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2845 * exists, but all sdevs on it are blocked from further I/O. The following
2848 * If the remote port does not return (signaled by a LLDD call to
2849 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2850 * scsi target is removed - killing all outstanding i/o and removing the
2851 * scsi devices attached ot it. The port structure will be marked Not
2852 * Present and be partially cleared, leaving only enough information to
2853 * recognize the remote port relative to the scsi target id binding if
2854 * it later appears. The port will remain as long as there is a valid
2855 * binding (e.g. until the user changes the binding type or unloads the
2856 * scsi host with the binding).
2858 * If the remote port returns within the dev_loss_tmo value (and matches
2859 * according to the target id binding type), the port structure will be
2860 * reused. If it is no longer a SCSI target, the target will be torn
2861 * down. If it continues to be a SCSI target, then the target will be
2862 * unblocked (allowing i/o to be resumed), and a scan will be activated
2863 * to ensure that all luns are detected.
2865 * Called from normal process context only - cannot be called from interrupt.
2868 * This routine assumes no locks are held on entry.
2871 fc_remote_port_delete(struct fc_rport
*rport
)
2873 struct Scsi_Host
*shost
= rport_to_shost(rport
);
2874 unsigned long timeout
= rport
->dev_loss_tmo
;
2875 unsigned long flags
;
2878 * No need to flush the fc_host work_q's, as all adds are synchronous.
2880 * We do need to reclaim the rport scan work element, so eventually
2881 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2882 * there's still a scan pending.
2885 spin_lock_irqsave(shost
->host_lock
, flags
);
2887 if (rport
->port_state
!= FC_PORTSTATE_ONLINE
) {
2888 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2893 * In the past, we if this was not an FCP-Target, we would
2894 * unconditionally just jump to deleting the rport.
2895 * However, rports can be used as node containers by the LLDD,
2896 * and its not appropriate to just terminate the rport at the
2897 * first sign of a loss in connectivity. The LLDD may want to
2898 * send ELS traffic to re-validate the login. If the rport is
2899 * immediately deleted, it makes it inappropriate for a node
2901 * So... we now unconditionally wait dev_loss_tmo before
2902 * destroying an rport.
2905 rport
->port_state
= FC_PORTSTATE_BLOCKED
;
2907 rport
->flags
|= FC_RPORT_DEVLOSS_PENDING
;
2909 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2911 if (rport
->roles
& FC_PORT_ROLE_FCP_INITIATOR
&&
2912 shost
->active_mode
& MODE_TARGET
)
2913 fc_tgt_it_nexus_destroy(shost
, (unsigned long)rport
);
2915 scsi_target_block(&rport
->dev
);
2917 /* see if we need to kill io faster than waiting for device loss */
2918 if ((rport
->fast_io_fail_tmo
!= -1) &&
2919 (rport
->fast_io_fail_tmo
< timeout
))
2920 fc_queue_devloss_work(shost
, &rport
->fail_io_work
,
2921 rport
->fast_io_fail_tmo
* HZ
);
2923 /* cap the length the devices can be blocked until they are deleted */
2924 fc_queue_devloss_work(shost
, &rport
->dev_loss_work
, timeout
* HZ
);
2926 EXPORT_SYMBOL(fc_remote_port_delete
);
2929 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
2930 * @rport: The remote port that changed.
2931 * @roles: New roles for this port.
2933 * Description: The LLDD calls this routine to notify the transport that the
2934 * roles on a remote port may have changed. The largest effect of this is
2935 * if a port now becomes a FCP Target, it must be allocated a
2936 * scsi target id. If the port is no longer a FCP target, any
2937 * scsi target id value assigned to it will persist in case the
2938 * role changes back to include FCP Target. No changes in the scsi
2939 * midlayer will be invoked if the role changes (in the expectation
2940 * that the role will be resumed. If it doesn't normal error processing
2943 * Should not be called from interrupt context.
2946 * This routine assumes no locks are held on entry.
2949 fc_remote_port_rolechg(struct fc_rport
*rport
, u32 roles
)
2951 struct Scsi_Host
*shost
= rport_to_shost(rport
);
2952 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
2953 unsigned long flags
;
2957 spin_lock_irqsave(shost
->host_lock
, flags
);
2958 if (roles
& FC_PORT_ROLE_FCP_TARGET
) {
2959 if (rport
->scsi_target_id
== -1) {
2960 rport
->scsi_target_id
= fc_host
->next_target_id
++;
2962 } else if (!(rport
->roles
& FC_PORT_ROLE_FCP_TARGET
))
2964 } else if (shost
->active_mode
& MODE_TARGET
) {
2965 ret
= fc_tgt_it_nexus_create(shost
, (unsigned long)rport
,
2966 (char *)&rport
->node_name
);
2968 printk(KERN_ERR
"FC Remore Port tgt nexus failed %d\n",
2972 rport
->roles
= roles
;
2974 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2978 * There may have been a delete timer running on the
2979 * port. Ensure that it is cancelled as we now know
2980 * the port is an FCP Target.
2981 * Note: we know the rport is exists and in an online
2982 * state as the LLDD would not have had an rport
2983 * reference to pass us.
2985 * Take no action on the del_timer failure as the state
2986 * machine state change will validate the
2989 if (!cancel_delayed_work(&rport
->fail_io_work
))
2990 fc_flush_devloss(shost
);
2991 if (!cancel_delayed_work(&rport
->dev_loss_work
))
2992 fc_flush_devloss(shost
);
2994 spin_lock_irqsave(shost
->host_lock
, flags
);
2995 rport
->flags
&= ~(FC_RPORT_FAST_FAIL_TIMEDOUT
|
2996 FC_RPORT_DEVLOSS_PENDING
);
2997 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2999 /* ensure any stgt delete functions are done */
3000 fc_flush_work(shost
);
3002 /* initiate a scan of the target */
3003 spin_lock_irqsave(shost
->host_lock
, flags
);
3004 rport
->flags
|= FC_RPORT_SCAN_PENDING
;
3005 scsi_queue_work(shost
, &rport
->scan_work
);
3006 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3007 scsi_target_unblock(&rport
->dev
);
3010 EXPORT_SYMBOL(fc_remote_port_rolechg
);
3013 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3014 * @work: rport target that failed to reappear in the allotted time.
3016 * Description: An attempt to delete a remote port blocks, and if it fails
3017 * to return in the allotted time this gets called.
3020 fc_timeout_deleted_rport(struct work_struct
*work
)
3022 struct fc_rport
*rport
=
3023 container_of(work
, struct fc_rport
, dev_loss_work
.work
);
3024 struct Scsi_Host
*shost
= rport_to_shost(rport
);
3025 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3026 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
3027 unsigned long flags
;
3028 int do_callback
= 0;
3030 spin_lock_irqsave(shost
->host_lock
, flags
);
3032 rport
->flags
&= ~FC_RPORT_DEVLOSS_PENDING
;
3035 * If the port is ONLINE, then it came back. If it was a SCSI
3036 * target, validate it still is. If not, tear down the
3037 * scsi_target on it.
3039 if ((rport
->port_state
== FC_PORTSTATE_ONLINE
) &&
3040 (rport
->scsi_target_id
!= -1) &&
3041 !(rport
->roles
& FC_PORT_ROLE_FCP_TARGET
)) {
3042 dev_printk(KERN_ERR
, &rport
->dev
,
3043 "blocked FC remote port time out: no longer"
3044 " a FCP target, removing starget\n");
3045 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3046 scsi_target_unblock(&rport
->dev
);
3047 fc_queue_work(shost
, &rport
->stgt_delete_work
);
3051 /* NOOP state - we're flushing workq's */
3052 if (rport
->port_state
!= FC_PORTSTATE_BLOCKED
) {
3053 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3054 dev_printk(KERN_ERR
, &rport
->dev
,
3055 "blocked FC remote port time out: leaving"
3057 (rport
->scsi_target_id
!= -1) ? " and starget" : "");
3061 if ((fc_host
->tgtid_bind_type
== FC_TGTID_BIND_NONE
) ||
3062 (rport
->scsi_target_id
== -1)) {
3063 list_del(&rport
->peers
);
3064 rport
->port_state
= FC_PORTSTATE_DELETED
;
3065 dev_printk(KERN_ERR
, &rport
->dev
,
3066 "blocked FC remote port time out: removing"
3068 (rport
->scsi_target_id
!= -1) ? " and starget" : "");
3069 fc_queue_work(shost
, &rport
->rport_delete_work
);
3070 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3074 dev_printk(KERN_ERR
, &rport
->dev
,
3075 "blocked FC remote port time out: removing target and "
3076 "saving binding\n");
3078 list_move_tail(&rport
->peers
, &fc_host
->rport_bindings
);
3081 * Note: We do not remove or clear the hostdata area. This allows
3082 * host-specific target data to persist along with the
3083 * scsi_target_id. It's up to the host to manage it's hostdata area.
3087 * Reinitialize port attributes that may change if the port comes back.
3089 rport
->maxframe_size
= -1;
3090 rport
->supported_classes
= FC_COS_UNSPECIFIED
;
3091 rport
->roles
= FC_PORT_ROLE_UNKNOWN
;
3092 rport
->port_state
= FC_PORTSTATE_NOTPRESENT
;
3093 rport
->flags
&= ~FC_RPORT_FAST_FAIL_TIMEDOUT
;
3096 * Pre-emptively kill I/O rather than waiting for the work queue
3097 * item to teardown the starget. (FCOE libFC folks prefer this
3098 * and to have the rport_port_id still set when it's done).
3100 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3101 fc_terminate_rport_io(rport
);
3103 spin_lock_irqsave(shost
->host_lock
, flags
);
3105 if (rport
->port_state
== FC_PORTSTATE_NOTPRESENT
) { /* still missing */
3107 /* remove the identifiers that aren't used in the consisting binding */
3108 switch (fc_host
->tgtid_bind_type
) {
3109 case FC_TGTID_BIND_BY_WWPN
:
3110 rport
->node_name
= -1;
3111 rport
->port_id
= -1;
3113 case FC_TGTID_BIND_BY_WWNN
:
3114 rport
->port_name
= -1;
3115 rport
->port_id
= -1;
3117 case FC_TGTID_BIND_BY_ID
:
3118 rport
->node_name
= -1;
3119 rport
->port_name
= -1;
3121 case FC_TGTID_BIND_NONE
: /* to keep compiler happy */
3126 * As this only occurs if the remote port (scsi target)
3127 * went away and didn't come back - we'll remove
3128 * all attached scsi devices.
3130 rport
->flags
|= FC_RPORT_DEVLOSS_CALLBK_DONE
;
3131 fc_queue_work(shost
, &rport
->stgt_delete_work
);
3136 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3139 * Notify the driver that the rport is now dead. The LLDD will
3140 * also guarantee that any communication to the rport is terminated
3142 * Note: we set the CALLBK_DONE flag above to correspond
3144 if (do_callback
&& i
->f
->dev_loss_tmo_callbk
)
3145 i
->f
->dev_loss_tmo_callbk(rport
);
3150 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3151 * @work: rport to terminate io on.
3153 * Notes: Only requests the failure of the io, not that all are flushed
3154 * prior to returning.
3157 fc_timeout_fail_rport_io(struct work_struct
*work
)
3159 struct fc_rport
*rport
=
3160 container_of(work
, struct fc_rport
, fail_io_work
.work
);
3162 if (rport
->port_state
!= FC_PORTSTATE_BLOCKED
)
3165 rport
->flags
|= FC_RPORT_FAST_FAIL_TIMEDOUT
;
3166 fc_terminate_rport_io(rport
);
3170 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3171 * @work: remote port to be scanned.
3174 fc_scsi_scan_rport(struct work_struct
*work
)
3176 struct fc_rport
*rport
=
3177 container_of(work
, struct fc_rport
, scan_work
);
3178 struct Scsi_Host
*shost
= rport_to_shost(rport
);
3179 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3180 unsigned long flags
;
3182 if ((rport
->port_state
== FC_PORTSTATE_ONLINE
) &&
3183 (rport
->roles
& FC_PORT_ROLE_FCP_TARGET
) &&
3184 !(i
->f
->disable_target_scan
)) {
3185 scsi_scan_target(&rport
->dev
, rport
->channel
,
3186 rport
->scsi_target_id
, SCAN_WILD_CARD
, 1);
3189 spin_lock_irqsave(shost
->host_lock
, flags
);
3190 rport
->flags
&= ~FC_RPORT_SCAN_PENDING
;
3191 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3195 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3196 * @cmnd: SCSI command that scsi_eh is trying to recover
3198 * This routine can be called from a FC LLD scsi_eh callback. It
3199 * blocks the scsi_eh thread until the fc_rport leaves the
3200 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3201 * necessary to avoid the scsi_eh failing recovery actions for blocked
3202 * rports which would lead to offlined SCSI devices.
3204 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3205 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3206 * passed back to scsi_eh.
3208 int fc_block_scsi_eh(struct scsi_cmnd
*cmnd
)
3210 struct Scsi_Host
*shost
= cmnd
->device
->host
;
3211 struct fc_rport
*rport
= starget_to_rport(scsi_target(cmnd
->device
));
3212 unsigned long flags
;
3214 spin_lock_irqsave(shost
->host_lock
, flags
);
3215 while (rport
->port_state
== FC_PORTSTATE_BLOCKED
&&
3216 !(rport
->flags
& FC_RPORT_FAST_FAIL_TIMEDOUT
)) {
3217 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3219 spin_lock_irqsave(shost
->host_lock
, flags
);
3221 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3223 if (rport
->flags
& FC_RPORT_FAST_FAIL_TIMEDOUT
)
3224 return FAST_IO_FAIL
;
3228 EXPORT_SYMBOL(fc_block_scsi_eh
);
3231 * fc_vport_setup - allocates and creates a FC virtual port.
3232 * @shost: scsi host the virtual port is connected to.
3233 * @channel: Channel on shost port connected to.
3234 * @pdev: parent device for vport
3235 * @ids: The world wide names, FC4 port roles, etc for
3237 * @ret_vport: The pointer to the created vport.
3239 * Allocates and creates the vport structure, calls the parent host
3240 * to instantiate the vport, the completes w/ class and sysfs creation.
3243 * This routine assumes no locks are held on entry.
3246 fc_vport_setup(struct Scsi_Host
*shost
, int channel
, struct device
*pdev
,
3247 struct fc_vport_identifiers
*ids
, struct fc_vport
**ret_vport
)
3249 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
3250 struct fc_internal
*fci
= to_fc_internal(shost
->transportt
);
3251 struct fc_vport
*vport
;
3253 unsigned long flags
;
3259 if ( ! fci
->f
->vport_create
)
3262 size
= (sizeof(struct fc_vport
) + fci
->f
->dd_fcvport_size
);
3263 vport
= kzalloc(size
, GFP_KERNEL
);
3264 if (unlikely(!vport
)) {
3265 printk(KERN_ERR
"%s: allocation failure\n", __func__
);
3269 vport
->vport_state
= FC_VPORT_UNKNOWN
;
3270 vport
->vport_last_state
= FC_VPORT_UNKNOWN
;
3271 vport
->node_name
= ids
->node_name
;
3272 vport
->port_name
= ids
->port_name
;
3273 vport
->roles
= ids
->roles
;
3274 vport
->vport_type
= ids
->vport_type
;
3275 if (fci
->f
->dd_fcvport_size
)
3276 vport
->dd_data
= &vport
[1];
3277 vport
->shost
= shost
;
3278 vport
->channel
= channel
;
3279 vport
->flags
= FC_VPORT_CREATING
;
3280 INIT_WORK(&vport
->vport_delete_work
, fc_vport_sched_delete
);
3282 spin_lock_irqsave(shost
->host_lock
, flags
);
3284 if (fc_host
->npiv_vports_inuse
>= fc_host
->max_npiv_vports
) {
3285 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3289 fc_host
->npiv_vports_inuse
++;
3290 vport
->number
= fc_host
->next_vport_number
++;
3291 list_add_tail(&vport
->peers
, &fc_host
->vports
);
3292 get_device(&shost
->shost_gendev
); /* for fc_host->vport list */
3294 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3297 device_initialize(dev
); /* takes self reference */
3298 dev
->parent
= get_device(pdev
); /* takes parent reference */
3299 dev
->release
= fc_vport_dev_release
;
3300 dev_set_name(dev
, "vport-%d:%d-%d",
3301 shost
->host_no
, channel
, vport
->number
);
3302 transport_setup_device(dev
);
3304 error
= device_add(dev
);
3306 printk(KERN_ERR
"FC Virtual Port device_add failed\n");
3309 transport_add_device(dev
);
3310 transport_configure_device(dev
);
3312 error
= fci
->f
->vport_create(vport
, ids
->disable
);
3314 printk(KERN_ERR
"FC Virtual Port LLDD Create failed\n");
3315 goto delete_vport_all
;
3319 * if the parent isn't the physical adapter's Scsi_Host, ensure
3320 * the Scsi_Host at least contains ia symlink to the vport.
3322 if (pdev
!= &shost
->shost_gendev
) {
3323 error
= sysfs_create_link(&shost
->shost_gendev
.kobj
,
3324 &dev
->kobj
, dev_name(dev
));
3327 "%s: Cannot create vport symlinks for "
3329 __func__
, dev_name(dev
), error
);
3331 spin_lock_irqsave(shost
->host_lock
, flags
);
3332 vport
->flags
&= ~FC_VPORT_CREATING
;
3333 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3335 dev_printk(KERN_NOTICE
, pdev
,
3336 "%s created via shost%d channel %d\n", dev_name(dev
),
3337 shost
->host_no
, channel
);
3344 transport_remove_device(dev
);
3347 transport_destroy_device(dev
);
3348 spin_lock_irqsave(shost
->host_lock
, flags
);
3349 list_del(&vport
->peers
);
3350 put_device(&shost
->shost_gendev
); /* for fc_host->vport list */
3351 fc_host
->npiv_vports_inuse
--;
3352 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3353 put_device(dev
->parent
);
3360 * fc_vport_create - Admin App or LLDD requests creation of a vport
3361 * @shost: scsi host the virtual port is connected to.
3362 * @channel: channel on shost port connected to.
3363 * @ids: The world wide names, FC4 port roles, etc for
3367 * This routine assumes no locks are held on entry.
3370 fc_vport_create(struct Scsi_Host
*shost
, int channel
,
3371 struct fc_vport_identifiers
*ids
)
3374 struct fc_vport
*vport
;
3376 stat
= fc_vport_setup(shost
, channel
, &shost
->shost_gendev
,
3378 return stat
? NULL
: vport
;
3380 EXPORT_SYMBOL(fc_vport_create
);
3383 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3384 * @vport: fc_vport to be terminated
3386 * Calls the LLDD vport_delete() function, then deallocates and removes
3387 * the vport from the shost and object tree.
3390 * This routine assumes no locks are held on entry.
3393 fc_vport_terminate(struct fc_vport
*vport
)
3395 struct Scsi_Host
*shost
= vport_to_shost(vport
);
3396 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
3397 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3398 struct device
*dev
= &vport
->dev
;
3399 unsigned long flags
;
3402 if (i
->f
->vport_delete
)
3403 stat
= i
->f
->vport_delete(vport
);
3407 spin_lock_irqsave(shost
->host_lock
, flags
);
3408 vport
->flags
&= ~FC_VPORT_DELETING
;
3410 vport
->flags
|= FC_VPORT_DELETED
;
3411 list_del(&vport
->peers
);
3412 fc_host
->npiv_vports_inuse
--;
3413 put_device(&shost
->shost_gendev
); /* for fc_host->vport list */
3415 spin_unlock_irqrestore(shost
->host_lock
, flags
);
3420 if (dev
->parent
!= &shost
->shost_gendev
)
3421 sysfs_remove_link(&shost
->shost_gendev
.kobj
, dev_name(dev
));
3422 transport_remove_device(dev
);
3424 transport_destroy_device(dev
);
3427 * Removing our self-reference should mean our
3428 * release function gets called, which will drop the remaining
3429 * parent reference and free the data structure.
3431 put_device(dev
); /* for self-reference */
3433 return 0; /* SUCCESS */
3435 EXPORT_SYMBOL(fc_vport_terminate
);
3438 * fc_vport_sched_delete - workq-based delete request for a vport
3439 * @work: vport to be deleted.
3442 fc_vport_sched_delete(struct work_struct
*work
)
3444 struct fc_vport
*vport
=
3445 container_of(work
, struct fc_vport
, vport_delete_work
);
3448 stat
= fc_vport_terminate(vport
);
3450 dev_printk(KERN_ERR
, vport
->dev
.parent
,
3451 "%s: %s could not be deleted created via "
3452 "shost%d channel %d - error %d\n", __func__
,
3453 dev_name(&vport
->dev
), vport
->shost
->host_no
,
3454 vport
->channel
, stat
);
3464 * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job
3465 * @job: fc_bsg_job that is to be torn down
3468 fc_destroy_bsgjob(struct fc_bsg_job
*job
)
3470 unsigned long flags
;
3472 spin_lock_irqsave(&job
->job_lock
, flags
);
3474 spin_unlock_irqrestore(&job
->job_lock
, flags
);
3477 spin_unlock_irqrestore(&job
->job_lock
, flags
);
3479 put_device(job
->dev
); /* release reference for the request */
3481 kfree(job
->request_payload
.sg_list
);
3482 kfree(job
->reply_payload
.sg_list
);
3487 * fc_bsg_jobdone - completion routine for bsg requests that the LLD has
3489 * @job: fc_bsg_job that is complete
3492 fc_bsg_jobdone(struct fc_bsg_job
*job
)
3494 struct request
*req
= job
->req
;
3495 struct request
*rsp
= req
->next_rq
;
3498 err
= job
->req
->errors
= job
->reply
->result
;
3501 /* we're only returning the result field in the reply */
3502 job
->req
->sense_len
= sizeof(uint32_t);
3504 job
->req
->sense_len
= job
->reply_len
;
3506 /* we assume all request payload was transferred, residual == 0 */
3510 WARN_ON(job
->reply
->reply_payload_rcv_len
> rsp
->resid_len
);
3512 /* set reply (bidi) residual */
3513 rsp
->resid_len
-= min(job
->reply
->reply_payload_rcv_len
,
3516 blk_complete_request(req
);
3520 * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests
3521 * @rq: BSG request that holds the job to be destroyed
3523 static void fc_bsg_softirq_done(struct request
*rq
)
3525 struct fc_bsg_job
*job
= rq
->special
;
3526 unsigned long flags
;
3528 spin_lock_irqsave(&job
->job_lock
, flags
);
3529 job
->state_flags
|= FC_RQST_STATE_DONE
;
3531 spin_unlock_irqrestore(&job
->job_lock
, flags
);
3533 blk_end_request_all(rq
, rq
->errors
);
3534 fc_destroy_bsgjob(job
);
3538 * fc_bsg_job_timeout - handler for when a bsg request timesout
3539 * @req: request that timed out
3541 static enum blk_eh_timer_return
3542 fc_bsg_job_timeout(struct request
*req
)
3544 struct fc_bsg_job
*job
= (void *) req
->special
;
3545 struct Scsi_Host
*shost
= job
->shost
;
3546 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3547 unsigned long flags
;
3548 int err
= 0, done
= 0;
3550 if (job
->rport
&& job
->rport
->port_state
== FC_PORTSTATE_BLOCKED
)
3551 return BLK_EH_RESET_TIMER
;
3553 spin_lock_irqsave(&job
->job_lock
, flags
);
3554 if (job
->state_flags
& FC_RQST_STATE_DONE
)
3558 spin_unlock_irqrestore(&job
->job_lock
, flags
);
3560 if (!done
&& i
->f
->bsg_timeout
) {
3561 /* call LLDD to abort the i/o as it has timed out */
3562 err
= i
->f
->bsg_timeout(job
);
3563 if (err
== -EAGAIN
) {
3565 return BLK_EH_RESET_TIMER
;
3567 printk(KERN_ERR
"ERROR: FC BSG request timeout - LLD "
3568 "abort failed with status %d\n", err
);
3571 /* the blk_end_sync_io() doesn't check the error */
3573 return BLK_EH_NOT_HANDLED
;
3575 return BLK_EH_HANDLED
;
3579 fc_bsg_map_buffer(struct fc_bsg_buffer
*buf
, struct request
*req
)
3581 size_t sz
= (sizeof(struct scatterlist
) * req
->nr_phys_segments
);
3583 BUG_ON(!req
->nr_phys_segments
);
3585 buf
->sg_list
= kzalloc(sz
, GFP_KERNEL
);
3588 sg_init_table(buf
->sg_list
, req
->nr_phys_segments
);
3589 buf
->sg_cnt
= blk_rq_map_sg(req
->q
, req
, buf
->sg_list
);
3590 buf
->payload_len
= blk_rq_bytes(req
);
3596 * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the
3598 * @shost: SCSI Host corresponding to the bsg object
3599 * @rport: (optional) FC Remote Port corresponding to the bsg object
3600 * @req: BSG request that needs a job structure
3603 fc_req_to_bsgjob(struct Scsi_Host
*shost
, struct fc_rport
*rport
,
3604 struct request
*req
)
3606 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3607 struct request
*rsp
= req
->next_rq
;
3608 struct fc_bsg_job
*job
;
3611 BUG_ON(req
->special
);
3613 job
= kzalloc(sizeof(struct fc_bsg_job
) + i
->f
->dd_bsg_size
,
3619 * Note: this is a bit silly.
3620 * The request gets formatted as a SGIO v4 ioctl request, which
3621 * then gets reformatted as a blk request, which then gets
3622 * reformatted as a fc bsg request. And on completion, we have
3623 * to wrap return results such that SGIO v4 thinks it was a scsi
3624 * status. I hope this was all worth it.
3631 if (i
->f
->dd_bsg_size
)
3632 job
->dd_data
= (void *)&job
[1];
3633 spin_lock_init(&job
->job_lock
);
3634 job
->request
= (struct fc_bsg_request
*)req
->cmd
;
3635 job
->request_len
= req
->cmd_len
;
3636 job
->reply
= req
->sense
;
3637 job
->reply_len
= SCSI_SENSE_BUFFERSIZE
; /* Size of sense buffer
3640 ret
= fc_bsg_map_buffer(&job
->request_payload
, req
);
3642 goto failjob_rls_job
;
3644 if (rsp
&& rsp
->bio
) {
3645 ret
= fc_bsg_map_buffer(&job
->reply_payload
, rsp
);
3647 goto failjob_rls_rqst_payload
;
3649 job
->job_done
= fc_bsg_jobdone
;
3651 job
->dev
= &rport
->dev
;
3653 job
->dev
= &shost
->shost_gendev
;
3654 get_device(job
->dev
); /* take a reference for the request */
3661 failjob_rls_rqst_payload
:
3662 kfree(job
->request_payload
.sg_list
);
3669 enum fc_dispatch_result
{
3670 FC_DISPATCH_BREAK
, /* on return, q is locked, break from q loop */
3671 FC_DISPATCH_LOCKED
, /* on return, q is locked, continue on */
3672 FC_DISPATCH_UNLOCKED
, /* on return, q is unlocked, continue on */
3677 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
3678 * @q: fc host request queue
3679 * @shost: scsi host rport attached to
3680 * @job: bsg job to be processed
3682 static enum fc_dispatch_result
3683 fc_bsg_host_dispatch(struct request_queue
*q
, struct Scsi_Host
*shost
,
3684 struct fc_bsg_job
*job
)
3686 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3687 int cmdlen
= sizeof(uint32_t); /* start with length of msgcode */
3690 /* Validate the host command */
3691 switch (job
->request
->msgcode
) {
3692 case FC_BSG_HST_ADD_RPORT
:
3693 cmdlen
+= sizeof(struct fc_bsg_host_add_rport
);
3696 case FC_BSG_HST_DEL_RPORT
:
3697 cmdlen
+= sizeof(struct fc_bsg_host_del_rport
);
3700 case FC_BSG_HST_ELS_NOLOGIN
:
3701 cmdlen
+= sizeof(struct fc_bsg_host_els
);
3702 /* there better be a xmt and rcv payloads */
3703 if ((!job
->request_payload
.payload_len
) ||
3704 (!job
->reply_payload
.payload_len
)) {
3711 cmdlen
+= sizeof(struct fc_bsg_host_ct
);
3712 /* there better be xmt and rcv payloads */
3713 if ((!job
->request_payload
.payload_len
) ||
3714 (!job
->reply_payload
.payload_len
)) {
3720 case FC_BSG_HST_VENDOR
:
3721 cmdlen
+= sizeof(struct fc_bsg_host_vendor
);
3722 if ((shost
->hostt
->vendor_id
== 0L) ||
3723 (job
->request
->rqst_data
.h_vendor
.vendor_id
!=
3724 shost
->hostt
->vendor_id
)) {
3735 /* check if we really have all the request data needed */
3736 if (job
->request_len
< cmdlen
) {
3741 ret
= i
->f
->bsg_request(job
);
3743 return FC_DISPATCH_UNLOCKED
;
3746 /* return the errno failure code as the only status */
3747 BUG_ON(job
->reply_len
< sizeof(uint32_t));
3748 job
->reply
->reply_payload_rcv_len
= 0;
3749 job
->reply
->result
= ret
;
3750 job
->reply_len
= sizeof(uint32_t);
3751 fc_bsg_jobdone(job
);
3752 return FC_DISPATCH_UNLOCKED
;
3757 * fc_bsg_goose_queue - restart rport queue in case it was stopped
3758 * @rport: rport to be restarted
3761 fc_bsg_goose_queue(struct fc_rport
*rport
)
3764 unsigned long flags
;
3769 get_device(&rport
->dev
);
3771 spin_lock_irqsave(rport
->rqst_q
->queue_lock
, flags
);
3772 flagset
= test_bit(QUEUE_FLAG_REENTER
, &rport
->rqst_q
->queue_flags
) &&
3773 !test_bit(QUEUE_FLAG_REENTER
, &rport
->rqst_q
->queue_flags
);
3775 queue_flag_set(QUEUE_FLAG_REENTER
, rport
->rqst_q
);
3776 __blk_run_queue(rport
->rqst_q
);
3778 queue_flag_clear(QUEUE_FLAG_REENTER
, rport
->rqst_q
);
3779 spin_unlock_irqrestore(rport
->rqst_q
->queue_lock
, flags
);
3781 put_device(&rport
->dev
);
3786 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
3787 * @q: rport request queue
3788 * @shost: scsi host rport attached to
3789 * @rport: rport request destined to
3790 * @job: bsg job to be processed
3792 static enum fc_dispatch_result
3793 fc_bsg_rport_dispatch(struct request_queue
*q
, struct Scsi_Host
*shost
,
3794 struct fc_rport
*rport
, struct fc_bsg_job
*job
)
3796 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3797 int cmdlen
= sizeof(uint32_t); /* start with length of msgcode */
3800 /* Validate the rport command */
3801 switch (job
->request
->msgcode
) {
3802 case FC_BSG_RPT_ELS
:
3803 cmdlen
+= sizeof(struct fc_bsg_rport_els
);
3807 cmdlen
+= sizeof(struct fc_bsg_rport_ct
);
3809 /* there better be xmt and rcv payloads */
3810 if ((!job
->request_payload
.payload_len
) ||
3811 (!job
->reply_payload
.payload_len
)) {
3813 goto fail_rport_msg
;
3818 goto fail_rport_msg
;
3821 /* check if we really have all the request data needed */
3822 if (job
->request_len
< cmdlen
) {
3824 goto fail_rport_msg
;
3827 ret
= i
->f
->bsg_request(job
);
3829 return FC_DISPATCH_UNLOCKED
;
3832 /* return the errno failure code as the only status */
3833 BUG_ON(job
->reply_len
< sizeof(uint32_t));
3834 job
->reply
->reply_payload_rcv_len
= 0;
3835 job
->reply
->result
= ret
;
3836 job
->reply_len
= sizeof(uint32_t);
3837 fc_bsg_jobdone(job
);
3838 return FC_DISPATCH_UNLOCKED
;
3843 * fc_bsg_request_handler - generic handler for bsg requests
3844 * @q: request queue to manage
3845 * @shost: Scsi_Host related to the bsg object
3846 * @rport: FC remote port related to the bsg object (optional)
3847 * @dev: device structure for bsg object
3850 fc_bsg_request_handler(struct request_queue
*q
, struct Scsi_Host
*shost
,
3851 struct fc_rport
*rport
, struct device
*dev
)
3853 struct request
*req
;
3854 struct fc_bsg_job
*job
;
3855 enum fc_dispatch_result ret
;
3857 if (!get_device(dev
))
3860 while (!blk_queue_plugged(q
)) {
3861 if (rport
&& (rport
->port_state
== FC_PORTSTATE_BLOCKED
) &&
3862 !(rport
->flags
& FC_RPORT_FAST_FAIL_TIMEDOUT
))
3865 req
= blk_fetch_request(q
);
3869 if (rport
&& (rport
->port_state
!= FC_PORTSTATE_ONLINE
)) {
3870 req
->errors
= -ENXIO
;
3871 spin_unlock_irq(q
->queue_lock
);
3872 blk_end_request_all(req
, -ENXIO
);
3873 spin_lock_irq(q
->queue_lock
);
3877 spin_unlock_irq(q
->queue_lock
);
3879 ret
= fc_req_to_bsgjob(shost
, rport
, req
);
3882 blk_end_request_all(req
, ret
);
3883 spin_lock_irq(q
->queue_lock
);
3889 /* check if we have the msgcode value at least */
3890 if (job
->request_len
< sizeof(uint32_t)) {
3891 BUG_ON(job
->reply_len
< sizeof(uint32_t));
3892 job
->reply
->reply_payload_rcv_len
= 0;
3893 job
->reply
->result
= -ENOMSG
;
3894 job
->reply_len
= sizeof(uint32_t);
3895 fc_bsg_jobdone(job
);
3896 spin_lock_irq(q
->queue_lock
);
3900 /* the dispatch routines will unlock the queue_lock */
3902 ret
= fc_bsg_rport_dispatch(q
, shost
, rport
, job
);
3904 ret
= fc_bsg_host_dispatch(q
, shost
, job
);
3906 /* did dispatcher hit state that can't process any more */
3907 if (ret
== FC_DISPATCH_BREAK
)
3910 /* did dispatcher had released the lock */
3911 if (ret
== FC_DISPATCH_UNLOCKED
)
3912 spin_lock_irq(q
->queue_lock
);
3915 spin_unlock_irq(q
->queue_lock
);
3917 spin_lock_irq(q
->queue_lock
);
3922 * fc_bsg_host_handler - handler for bsg requests for a fc host
3923 * @q: fc host request queue
3926 fc_bsg_host_handler(struct request_queue
*q
)
3928 struct Scsi_Host
*shost
= q
->queuedata
;
3930 fc_bsg_request_handler(q
, shost
, NULL
, &shost
->shost_gendev
);
3935 * fc_bsg_rport_handler - handler for bsg requests for a fc rport
3936 * @q: rport request queue
3939 fc_bsg_rport_handler(struct request_queue
*q
)
3941 struct fc_rport
*rport
= q
->queuedata
;
3942 struct Scsi_Host
*shost
= rport_to_shost(rport
);
3944 fc_bsg_request_handler(q
, shost
, rport
, &rport
->dev
);
3949 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
3950 * @shost: shost for fc_host
3951 * @fc_host: fc_host adding the structures to
3954 fc_bsg_hostadd(struct Scsi_Host
*shost
, struct fc_host_attrs
*fc_host
)
3956 struct device
*dev
= &shost
->shost_gendev
;
3957 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
3958 struct request_queue
*q
;
3962 fc_host
->rqst_q
= NULL
;
3964 if (!i
->f
->bsg_request
)
3967 snprintf(bsg_name
, sizeof(bsg_name
),
3968 "fc_host%d", shost
->host_no
);
3970 q
= __scsi_alloc_queue(shost
, fc_bsg_host_handler
);
3972 printk(KERN_ERR
"fc_host%d: bsg interface failed to "
3973 "initialize - no request queue\n",
3978 q
->queuedata
= shost
;
3979 queue_flag_set_unlocked(QUEUE_FLAG_BIDI
, q
);
3980 blk_queue_softirq_done(q
, fc_bsg_softirq_done
);
3981 blk_queue_rq_timed_out(q
, fc_bsg_job_timeout
);
3982 blk_queue_rq_timeout(q
, FC_DEFAULT_BSG_TIMEOUT
);
3984 err
= bsg_register_queue(q
, dev
, bsg_name
, NULL
);
3986 printk(KERN_ERR
"fc_host%d: bsg interface failed to "
3987 "initialize - register queue\n",
3989 blk_cleanup_queue(q
);
3993 fc_host
->rqst_q
= q
;
3999 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
4000 * @shost: shost that rport is attached to
4001 * @rport: rport that the bsg hooks are being attached to
4004 fc_bsg_rportadd(struct Scsi_Host
*shost
, struct fc_rport
*rport
)
4006 struct device
*dev
= &rport
->dev
;
4007 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
4008 struct request_queue
*q
;
4011 rport
->rqst_q
= NULL
;
4013 if (!i
->f
->bsg_request
)
4016 q
= __scsi_alloc_queue(shost
, fc_bsg_rport_handler
);
4018 printk(KERN_ERR
"%s: bsg interface failed to "
4019 "initialize - no request queue\n",
4024 q
->queuedata
= rport
;
4025 queue_flag_set_unlocked(QUEUE_FLAG_BIDI
, q
);
4026 blk_queue_softirq_done(q
, fc_bsg_softirq_done
);
4027 blk_queue_rq_timed_out(q
, fc_bsg_job_timeout
);
4028 blk_queue_rq_timeout(q
, BLK_DEFAULT_SG_TIMEOUT
);
4030 err
= bsg_register_queue(q
, dev
, NULL
, NULL
);
4032 printk(KERN_ERR
"%s: bsg interface failed to "
4033 "initialize - register queue\n",
4035 blk_cleanup_queue(q
);
4045 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
4046 * @q: the request_queue that is to be torn down.
4049 fc_bsg_remove(struct request_queue
*q
)
4052 bsg_unregister_queue(q
);
4053 blk_cleanup_queue(q
);
4058 /* Original Author: Martin Hicks */
4059 MODULE_AUTHOR("James Smart");
4060 MODULE_DESCRIPTION("FC Transport Attributes");
4061 MODULE_LICENSE("GPL");
4063 module_init(fc_transport_init
);
4064 module_exit(fc_transport_exit
);