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) 2004-2005 James Smart, Emulex Corporation
23 * Rewrite for host, target, device, and remote port attributes,
24 * statistics, and service functions...
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <scsi/scsi_device.h>
30 #include <scsi/scsi_host.h>
31 #include <scsi/scsi_transport.h>
32 #include <scsi/scsi_transport_fc.h>
33 #include <scsi/scsi_cmnd.h>
34 #include <linux/netlink.h>
35 #include <net/netlink.h>
36 #include <scsi/scsi_netlink_fc.h>
37 #include "scsi_priv.h"
39 static int fc_queue_work(struct Scsi_Host
*, struct work_struct
*);
42 * Redefine so that we can have same named attributes in the
43 * sdev/starget/host objects.
45 #define FC_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
46 struct class_device_attribute class_device_attr_##_prefix##_##_name = \
47 __ATTR(_name,_mode,_show,_store)
49 #define fc_enum_name_search(title, table_type, table) \
50 static const char *get_fc_##title##_name(enum table_type table_key) \
55 for (i = 0; i < ARRAY_SIZE(table); i++) { \
56 if (table[i].value == table_key) { \
57 name = table[i].name; \
64 #define fc_enum_name_match(title, table_type, table) \
65 static int get_fc_##title##_match(const char *table_key, \
66 enum table_type *value) \
70 for (i = 0; i < ARRAY_SIZE(table); i++) { \
71 if (strncmp(table_key, table[i].name, \
72 table[i].matchlen) == 0) { \
73 *value = table[i].value; \
74 return 0; /* success */ \
77 return 1; /* failure */ \
81 /* Convert fc_port_type values to ascii string name */
83 enum fc_port_type value
;
85 } fc_port_type_names
[] = {
86 { FC_PORTTYPE_UNKNOWN
, "Unknown" },
87 { FC_PORTTYPE_OTHER
, "Other" },
88 { FC_PORTTYPE_NOTPRESENT
, "Not Present" },
89 { FC_PORTTYPE_NPORT
, "NPort (fabric via point-to-point)" },
90 { FC_PORTTYPE_NLPORT
, "NLPort (fabric via loop)" },
91 { FC_PORTTYPE_LPORT
, "LPort (private loop)" },
92 { FC_PORTTYPE_PTP
, "Point-To-Point (direct nport connection" },
94 fc_enum_name_search(port_type
, fc_port_type
, fc_port_type_names
)
95 #define FC_PORTTYPE_MAX_NAMELEN 50
98 /* Convert fc_host_event_code values to ascii string name */
100 enum fc_host_event_code value
;
102 } fc_host_event_code_names
[] = {
103 { FCH_EVT_LIP
, "lip" },
104 { FCH_EVT_LINKUP
, "link_up" },
105 { FCH_EVT_LINKDOWN
, "link_down" },
106 { FCH_EVT_LIPRESET
, "lip_reset" },
107 { FCH_EVT_RSCN
, "rscn" },
108 { FCH_EVT_ADAPTER_CHANGE
, "adapter_chg" },
109 { FCH_EVT_PORT_UNKNOWN
, "port_unknown" },
110 { FCH_EVT_PORT_ONLINE
, "port_online" },
111 { FCH_EVT_PORT_OFFLINE
, "port_offline" },
112 { FCH_EVT_PORT_FABRIC
, "port_fabric" },
113 { FCH_EVT_LINK_UNKNOWN
, "link_unknown" },
114 { FCH_EVT_VENDOR_UNIQUE
, "vendor_unique" },
116 fc_enum_name_search(host_event_code
, fc_host_event_code
,
117 fc_host_event_code_names
)
118 #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
121 /* Convert fc_port_state values to ascii string name */
123 enum fc_port_state value
;
125 } fc_port_state_names
[] = {
126 { FC_PORTSTATE_UNKNOWN
, "Unknown" },
127 { FC_PORTSTATE_NOTPRESENT
, "Not Present" },
128 { FC_PORTSTATE_ONLINE
, "Online" },
129 { FC_PORTSTATE_OFFLINE
, "Offline" },
130 { FC_PORTSTATE_BLOCKED
, "Blocked" },
131 { FC_PORTSTATE_BYPASSED
, "Bypassed" },
132 { FC_PORTSTATE_DIAGNOSTICS
, "Diagnostics" },
133 { FC_PORTSTATE_LINKDOWN
, "Linkdown" },
134 { FC_PORTSTATE_ERROR
, "Error" },
135 { FC_PORTSTATE_LOOPBACK
, "Loopback" },
136 { FC_PORTSTATE_DELETED
, "Deleted" },
138 fc_enum_name_search(port_state
, fc_port_state
, fc_port_state_names
)
139 #define FC_PORTSTATE_MAX_NAMELEN 20
142 /* Convert fc_tgtid_binding_type values to ascii string name */
143 static const struct {
144 enum fc_tgtid_binding_type value
;
147 } fc_tgtid_binding_type_names
[] = {
148 { FC_TGTID_BIND_NONE
, "none", 4 },
149 { FC_TGTID_BIND_BY_WWPN
, "wwpn (World Wide Port Name)", 4 },
150 { FC_TGTID_BIND_BY_WWNN
, "wwnn (World Wide Node Name)", 4 },
151 { FC_TGTID_BIND_BY_ID
, "port_id (FC Address)", 7 },
153 fc_enum_name_search(tgtid_bind_type
, fc_tgtid_binding_type
,
154 fc_tgtid_binding_type_names
)
155 fc_enum_name_match(tgtid_bind_type
, fc_tgtid_binding_type
,
156 fc_tgtid_binding_type_names
)
157 #define FC_BINDTYPE_MAX_NAMELEN 30
160 #define fc_bitfield_name_search(title, table) \
162 get_fc_##title##_names(u32 table_key, char *buf) \
168 for (i = 0; i < ARRAY_SIZE(table); i++) { \
169 if (table[i].value & table_key) { \
170 len += sprintf(buf + len, "%s%s", \
171 prefix, table[i].name); \
175 len += sprintf(buf + len, "\n"); \
180 /* Convert FC_COS bit values to ascii string name */
181 static const struct {
185 { FC_COS_CLASS1
, "Class 1" },
186 { FC_COS_CLASS2
, "Class 2" },
187 { FC_COS_CLASS3
, "Class 3" },
188 { FC_COS_CLASS4
, "Class 4" },
189 { FC_COS_CLASS6
, "Class 6" },
191 fc_bitfield_name_search(cos
, fc_cos_names
)
194 /* Convert FC_PORTSPEED bit values to ascii string name */
195 static const struct {
198 } fc_port_speed_names
[] = {
199 { FC_PORTSPEED_1GBIT
, "1 Gbit" },
200 { FC_PORTSPEED_2GBIT
, "2 Gbit" },
201 { FC_PORTSPEED_4GBIT
, "4 Gbit" },
202 { FC_PORTSPEED_10GBIT
, "10 Gbit" },
203 { FC_PORTSPEED_NOT_NEGOTIATED
, "Not Negotiated" },
205 fc_bitfield_name_search(port_speed
, fc_port_speed_names
)
209 show_fc_fc4s (char *buf
, u8
*fc4_list
)
213 for (i
= 0; i
< FC_FC4_LIST_SIZE
; i
++, fc4_list
++)
214 len
+= sprintf(buf
+ len
, "0x%02x ", *fc4_list
);
215 len
+= sprintf(buf
+ len
, "\n");
220 /* Convert FC_RPORT_ROLE bit values to ascii string name */
221 static const struct {
224 } fc_remote_port_role_names
[] = {
225 { FC_RPORT_ROLE_FCP_TARGET
, "FCP Target" },
226 { FC_RPORT_ROLE_FCP_INITIATOR
, "FCP Initiator" },
227 { FC_RPORT_ROLE_IP_PORT
, "IP Port" },
229 fc_bitfield_name_search(remote_port_roles
, fc_remote_port_role_names
)
232 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
234 #define FC_WELLKNOWN_PORTID_MASK 0xfffff0
235 #define FC_WELLKNOWN_ROLE_MASK 0x00000f
236 #define FC_FPORT_PORTID 0x00000e
237 #define FC_FABCTLR_PORTID 0x00000d
238 #define FC_DIRSRVR_PORTID 0x00000c
239 #define FC_TIMESRVR_PORTID 0x00000b
240 #define FC_MGMTSRVR_PORTID 0x00000a
243 static void fc_timeout_deleted_rport(struct work_struct
*work
);
244 static void fc_timeout_fail_rport_io(struct work_struct
*work
);
245 static void fc_scsi_scan_rport(struct work_struct
*work
);
248 * Attribute counts pre object type...
249 * Increase these values if you add attributes
251 #define FC_STARGET_NUM_ATTRS 3
252 #define FC_RPORT_NUM_ATTRS 10
253 #define FC_HOST_NUM_ATTRS 17
256 struct scsi_transport_template t
;
257 struct fc_function_template
*f
;
260 * For attributes : each object has :
261 * An array of the actual attributes structures
262 * An array of null-terminated pointers to the attribute
263 * structures - used for mid-layer interaction.
265 * The attribute containers for the starget and host are are
266 * part of the midlayer. As the remote port is specific to the
267 * fc transport, we must provide the attribute container.
269 struct class_device_attribute private_starget_attrs
[
270 FC_STARGET_NUM_ATTRS
];
271 struct class_device_attribute
*starget_attrs
[FC_STARGET_NUM_ATTRS
+ 1];
273 struct class_device_attribute private_host_attrs
[FC_HOST_NUM_ATTRS
];
274 struct class_device_attribute
*host_attrs
[FC_HOST_NUM_ATTRS
+ 1];
276 struct transport_container rport_attr_cont
;
277 struct class_device_attribute private_rport_attrs
[FC_RPORT_NUM_ATTRS
];
278 struct class_device_attribute
*rport_attrs
[FC_RPORT_NUM_ATTRS
+ 1];
281 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
283 static int fc_target_setup(struct transport_container
*tc
, struct device
*dev
,
284 struct class_device
*cdev
)
286 struct scsi_target
*starget
= to_scsi_target(dev
);
287 struct fc_rport
*rport
= starget_to_rport(starget
);
290 * if parent is remote port, use values from remote port.
291 * Otherwise, this host uses the fc_transport, but not the
292 * remote port interface. As such, initialize to known non-values.
295 fc_starget_node_name(starget
) = rport
->node_name
;
296 fc_starget_port_name(starget
) = rport
->port_name
;
297 fc_starget_port_id(starget
) = rport
->port_id
;
299 fc_starget_node_name(starget
) = -1;
300 fc_starget_port_name(starget
) = -1;
301 fc_starget_port_id(starget
) = -1;
307 static DECLARE_TRANSPORT_CLASS(fc_transport_class
,
313 static int fc_host_setup(struct transport_container
*tc
, struct device
*dev
,
314 struct class_device
*cdev
)
316 struct Scsi_Host
*shost
= dev_to_shost(dev
);
317 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
320 * Set default values easily detected by the midlayer as
321 * failure cases. The scsi lldd is responsible for initializing
322 * all transport attributes to valid values per host.
324 fc_host
->node_name
= -1;
325 fc_host
->port_name
= -1;
326 fc_host
->permanent_port_name
= -1;
327 fc_host
->supported_classes
= FC_COS_UNSPECIFIED
;
328 memset(fc_host
->supported_fc4s
, 0,
329 sizeof(fc_host
->supported_fc4s
));
330 fc_host
->supported_speeds
= FC_PORTSPEED_UNKNOWN
;
331 fc_host
->maxframe_size
= -1;
332 memset(fc_host
->serial_number
, 0,
333 sizeof(fc_host
->serial_number
));
335 fc_host
->port_id
= -1;
336 fc_host
->port_type
= FC_PORTTYPE_UNKNOWN
;
337 fc_host
->port_state
= FC_PORTSTATE_UNKNOWN
;
338 memset(fc_host
->active_fc4s
, 0,
339 sizeof(fc_host
->active_fc4s
));
340 fc_host
->speed
= FC_PORTSPEED_UNKNOWN
;
341 fc_host
->fabric_name
= -1;
342 memset(fc_host
->symbolic_name
, 0, sizeof(fc_host
->symbolic_name
));
343 memset(fc_host
->system_hostname
, 0, sizeof(fc_host
->system_hostname
));
345 fc_host
->tgtid_bind_type
= FC_TGTID_BIND_BY_WWPN
;
347 INIT_LIST_HEAD(&fc_host
->rports
);
348 INIT_LIST_HEAD(&fc_host
->rport_bindings
);
349 fc_host
->next_rport_number
= 0;
350 fc_host
->next_target_id
= 0;
352 snprintf(fc_host
->work_q_name
, KOBJ_NAME_LEN
, "fc_wq_%d",
354 fc_host
->work_q
= create_singlethread_workqueue(
355 fc_host
->work_q_name
);
356 if (!fc_host
->work_q
)
359 snprintf(fc_host
->devloss_work_q_name
, KOBJ_NAME_LEN
, "fc_dl_%d",
361 fc_host
->devloss_work_q
= create_singlethread_workqueue(
362 fc_host
->devloss_work_q_name
);
363 if (!fc_host
->devloss_work_q
) {
364 destroy_workqueue(fc_host
->work_q
);
365 fc_host
->work_q
= NULL
;
372 static DECLARE_TRANSPORT_CLASS(fc_host_class
,
379 * Setup and Remove actions for remote ports are handled
380 * in the service functions below.
382 static DECLARE_TRANSPORT_CLASS(fc_rport_class
,
393 * dev_loss_tmo: the default number of seconds that the FC transport
394 * should insulate the loss of a remote port.
395 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
397 static unsigned int fc_dev_loss_tmo
= 60; /* seconds */
399 module_param_named(dev_loss_tmo
, fc_dev_loss_tmo
, int, S_IRUGO
|S_IWUSR
);
400 MODULE_PARM_DESC(dev_loss_tmo
,
401 "Maximum number of seconds that the FC transport should"
402 " insulate the loss of a remote port. Once this value is"
403 " exceeded, the scsi target is removed. Value should be"
404 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT.");
407 * Netlink Infrastructure
410 static atomic_t fc_event_seq
;
413 * fc_get_event_number - Obtain the next sequential FC event number
416 * We could have inline'd this, but it would have required fc_event_seq to
417 * be exposed. For now, live with the subroutine call.
418 * Atomic used to avoid lock/unlock...
421 fc_get_event_number(void)
423 return atomic_add_return(1, &fc_event_seq
);
425 EXPORT_SYMBOL(fc_get_event_number
);
429 * fc_host_post_event - called to post an even on an fc_host.
431 * @shost: host the event occurred on
432 * @event_number: fc event number obtained from get_fc_event_number()
433 * @event_code: fc_host event being posted
434 * @event_data: 32bits of data for the event being posted
437 * This routine assumes no locks are held on entry.
440 fc_host_post_event(struct Scsi_Host
*shost
, u32 event_number
,
441 enum fc_host_event_code event_code
, u32 event_data
)
444 struct nlmsghdr
*nlh
;
445 struct fc_nl_event
*event
;
455 len
= FC_NL_MSGALIGN(sizeof(*event
));
456 skblen
= NLMSG_SPACE(len
);
458 skb
= alloc_skb(skblen
, GFP_KERNEL
);
464 nlh
= nlmsg_put(skb
, 0, 0, SCSI_TRANSPORT_MSG
,
465 skblen
- sizeof(*nlh
), 0);
470 event
= NLMSG_DATA(nlh
);
472 INIT_SCSI_NL_HDR(&event
->snlh
, SCSI_NL_TRANSPORT_FC
,
473 FC_NL_ASYNC_EVENT
, len
);
474 event
->seconds
= get_seconds();
475 event
->vendor_id
= 0;
476 event
->host_no
= shost
->host_no
;
477 event
->event_datalen
= sizeof(u32
); /* bytes */
478 event
->event_num
= event_number
;
479 event
->event_code
= event_code
;
480 event
->event_data
= event_data
;
482 err
= nlmsg_multicast(scsi_nl_sock
, skb
, 0, SCSI_NL_GRP_FC_EVENTS
,
484 if (err
&& (err
!= -ESRCH
)) /* filter no recipient errors */
485 /* nlmsg_multicast already kfree_skb'd */
493 name
= get_fc_host_event_code_name(event_code
);
495 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
496 __FUNCTION__
, shost
->host_no
,
497 (name
) ? name
: "<unknown>", event_data
, err
);
500 EXPORT_SYMBOL(fc_host_post_event
);
504 * fc_host_post_vendor_event - called to post a vendor unique event on
507 * @shost: host the event occurred on
508 * @event_number: fc event number obtained from get_fc_event_number()
509 * @data_len: amount, in bytes, of vendor unique data
510 * @data_buf: pointer to vendor unique data
513 * This routine assumes no locks are held on entry.
516 fc_host_post_vendor_event(struct Scsi_Host
*shost
, u32 event_number
,
517 u32 data_len
, char * data_buf
, u64 vendor_id
)
520 struct nlmsghdr
*nlh
;
521 struct fc_nl_event
*event
;
527 goto send_vendor_fail
;
530 len
= FC_NL_MSGALIGN(sizeof(*event
) + data_len
);
531 skblen
= NLMSG_SPACE(len
);
533 skb
= alloc_skb(skblen
, GFP_KERNEL
);
536 goto send_vendor_fail
;
539 nlh
= nlmsg_put(skb
, 0, 0, SCSI_TRANSPORT_MSG
,
540 skblen
- sizeof(*nlh
), 0);
543 goto send_vendor_fail_skb
;
545 event
= NLMSG_DATA(nlh
);
547 INIT_SCSI_NL_HDR(&event
->snlh
, SCSI_NL_TRANSPORT_FC
,
548 FC_NL_ASYNC_EVENT
, len
);
549 event
->seconds
= get_seconds();
550 event
->vendor_id
= vendor_id
;
551 event
->host_no
= shost
->host_no
;
552 event
->event_datalen
= data_len
; /* bytes */
553 event
->event_num
= event_number
;
554 event
->event_code
= FCH_EVT_VENDOR_UNIQUE
;
555 memcpy(&event
->event_data
, data_buf
, data_len
);
557 err
= nlmsg_multicast(scsi_nl_sock
, skb
, 0, SCSI_NL_GRP_FC_EVENTS
,
559 if (err
&& (err
!= -ESRCH
)) /* filter no recipient errors */
560 /* nlmsg_multicast already kfree_skb'd */
561 goto send_vendor_fail
;
565 send_vendor_fail_skb
:
569 "%s: Dropped Event : host %d vendor_unique - err %d\n",
570 __FUNCTION__
, shost
->host_no
, err
);
573 EXPORT_SYMBOL(fc_host_post_vendor_event
);
577 static __init
int fc_transport_init(void)
581 atomic_set(&fc_event_seq
, 0);
583 error
= transport_class_register(&fc_host_class
);
586 error
= transport_class_register(&fc_rport_class
);
589 return transport_class_register(&fc_transport_class
);
592 static void __exit
fc_transport_exit(void)
594 transport_class_unregister(&fc_transport_class
);
595 transport_class_unregister(&fc_rport_class
);
596 transport_class_unregister(&fc_host_class
);
600 * FC Remote Port Attribute Management
603 #define fc_rport_show_function(field, format_string, sz, cast) \
605 show_fc_rport_##field (struct class_device *cdev, char *buf) \
607 struct fc_rport *rport = transport_class_to_rport(cdev); \
608 struct Scsi_Host *shost = rport_to_shost(rport); \
609 struct fc_internal *i = to_fc_internal(shost->transportt); \
610 if ((i->f->get_rport_##field) && \
611 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
612 (rport->port_state == FC_PORTSTATE_DELETED) || \
613 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
614 i->f->get_rport_##field(rport); \
615 return snprintf(buf, sz, format_string, cast rport->field); \
618 #define fc_rport_store_function(field) \
620 store_fc_rport_##field(struct class_device *cdev, const char *buf, \
624 struct fc_rport *rport = transport_class_to_rport(cdev); \
625 struct Scsi_Host *shost = rport_to_shost(rport); \
626 struct fc_internal *i = to_fc_internal(shost->transportt); \
628 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
629 (rport->port_state == FC_PORTSTATE_DELETED) || \
630 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
632 val = simple_strtoul(buf, &cp, 0); \
633 if (*cp && (*cp != '\n')) \
635 i->f->set_rport_##field(rport, val); \
639 #define fc_rport_rd_attr(field, format_string, sz) \
640 fc_rport_show_function(field, format_string, sz, ) \
641 static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
642 show_fc_rport_##field, NULL)
644 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
645 fc_rport_show_function(field, format_string, sz, (cast)) \
646 static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
647 show_fc_rport_##field, NULL)
649 #define fc_rport_rw_attr(field, format_string, sz) \
650 fc_rport_show_function(field, format_string, sz, ) \
651 fc_rport_store_function(field) \
652 static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
653 show_fc_rport_##field, \
654 store_fc_rport_##field)
657 #define fc_private_rport_show_function(field, format_string, sz, cast) \
659 show_fc_rport_##field (struct class_device *cdev, char *buf) \
661 struct fc_rport *rport = transport_class_to_rport(cdev); \
662 return snprintf(buf, sz, format_string, cast rport->field); \
665 #define fc_private_rport_rd_attr(field, format_string, sz) \
666 fc_private_rport_show_function(field, format_string, sz, ) \
667 static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
668 show_fc_rport_##field, NULL)
670 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
671 fc_private_rport_show_function(field, format_string, sz, (cast)) \
672 static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
673 show_fc_rport_##field, NULL)
676 #define fc_private_rport_rd_enum_attr(title, maxlen) \
678 show_fc_rport_##title (struct class_device *cdev, char *buf) \
680 struct fc_rport *rport = transport_class_to_rport(cdev); \
682 name = get_fc_##title##_name(rport->title); \
685 return snprintf(buf, maxlen, "%s\n", name); \
687 static FC_CLASS_DEVICE_ATTR(rport, title, S_IRUGO, \
688 show_fc_rport_##title, NULL)
691 #define SETUP_RPORT_ATTRIBUTE_RD(field) \
692 i->private_rport_attrs[count] = class_device_attr_rport_##field; \
693 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
694 i->private_rport_attrs[count].store = NULL; \
695 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
696 if (i->f->show_rport_##field) \
699 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
700 i->private_rport_attrs[count] = class_device_attr_rport_##field; \
701 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
702 i->private_rport_attrs[count].store = NULL; \
703 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
706 #define SETUP_RPORT_ATTRIBUTE_RW(field) \
707 i->private_rport_attrs[count] = class_device_attr_rport_##field; \
708 if (!i->f->set_rport_##field) { \
709 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
710 i->private_rport_attrs[count].store = NULL; \
712 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
713 if (i->f->show_rport_##field) \
716 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
718 i->private_rport_attrs[count] = class_device_attr_rport_##field; \
719 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
724 /* The FC Transport Remote Port Attributes: */
726 /* Fixed Remote Port Attributes */
728 fc_private_rport_rd_attr(maxframe_size
, "%u bytes\n", 20);
731 show_fc_rport_supported_classes (struct class_device
*cdev
, char *buf
)
733 struct fc_rport
*rport
= transport_class_to_rport(cdev
);
734 if (rport
->supported_classes
== FC_COS_UNSPECIFIED
)
735 return snprintf(buf
, 20, "unspecified\n");
736 return get_fc_cos_names(rport
->supported_classes
, buf
);
738 static FC_CLASS_DEVICE_ATTR(rport
, supported_classes
, S_IRUGO
,
739 show_fc_rport_supported_classes
, NULL
);
741 /* Dynamic Remote Port Attributes */
744 * dev_loss_tmo attribute
746 fc_rport_show_function(dev_loss_tmo
, "%d\n", 20, )
748 store_fc_rport_dev_loss_tmo(struct class_device
*cdev
, const char *buf
,
752 struct fc_rport
*rport
= transport_class_to_rport(cdev
);
753 struct Scsi_Host
*shost
= rport_to_shost(rport
);
754 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
756 if ((rport
->port_state
== FC_PORTSTATE_BLOCKED
) ||
757 (rport
->port_state
== FC_PORTSTATE_DELETED
) ||
758 (rport
->port_state
== FC_PORTSTATE_NOTPRESENT
))
760 val
= simple_strtoul(buf
, &cp
, 0);
761 if ((*cp
&& (*cp
!= '\n')) ||
762 (val
< 0) || (val
> SCSI_DEVICE_BLOCK_MAX_TIMEOUT
))
764 i
->f
->set_rport_dev_loss_tmo(rport
, val
);
767 static FC_CLASS_DEVICE_ATTR(rport
, dev_loss_tmo
, S_IRUGO
| S_IWUSR
,
768 show_fc_rport_dev_loss_tmo
, store_fc_rport_dev_loss_tmo
);
771 /* Private Remote Port Attributes */
773 fc_private_rport_rd_attr_cast(node_name
, "0x%llx\n", 20, unsigned long long);
774 fc_private_rport_rd_attr_cast(port_name
, "0x%llx\n", 20, unsigned long long);
775 fc_private_rport_rd_attr(port_id
, "0x%06x\n", 20);
778 show_fc_rport_roles (struct class_device
*cdev
, char *buf
)
780 struct fc_rport
*rport
= transport_class_to_rport(cdev
);
782 /* identify any roles that are port_id specific */
783 if ((rport
->port_id
!= -1) &&
784 (rport
->port_id
& FC_WELLKNOWN_PORTID_MASK
) ==
785 FC_WELLKNOWN_PORTID_MASK
) {
786 switch (rport
->port_id
& FC_WELLKNOWN_ROLE_MASK
) {
787 case FC_FPORT_PORTID
:
788 return snprintf(buf
, 30, "Fabric Port\n");
789 case FC_FABCTLR_PORTID
:
790 return snprintf(buf
, 30, "Fabric Controller\n");
791 case FC_DIRSRVR_PORTID
:
792 return snprintf(buf
, 30, "Directory Server\n");
793 case FC_TIMESRVR_PORTID
:
794 return snprintf(buf
, 30, "Time Server\n");
795 case FC_MGMTSRVR_PORTID
:
796 return snprintf(buf
, 30, "Management Server\n");
798 return snprintf(buf
, 30, "Unknown Fabric Entity\n");
801 if (rport
->roles
== FC_RPORT_ROLE_UNKNOWN
)
802 return snprintf(buf
, 20, "unknown\n");
803 return get_fc_remote_port_roles_names(rport
->roles
, buf
);
806 static FC_CLASS_DEVICE_ATTR(rport
, roles
, S_IRUGO
,
807 show_fc_rport_roles
, NULL
);
809 fc_private_rport_rd_enum_attr(port_state
, FC_PORTSTATE_MAX_NAMELEN
);
810 fc_private_rport_rd_attr(scsi_target_id
, "%d\n", 20);
813 * fast_io_fail_tmo attribute
816 show_fc_rport_fast_io_fail_tmo (struct class_device
*cdev
, char *buf
)
818 struct fc_rport
*rport
= transport_class_to_rport(cdev
);
820 if (rport
->fast_io_fail_tmo
== -1)
821 return snprintf(buf
, 5, "off\n");
822 return snprintf(buf
, 20, "%d\n", rport
->fast_io_fail_tmo
);
826 store_fc_rport_fast_io_fail_tmo(struct class_device
*cdev
, const char *buf
,
831 struct fc_rport
*rport
= transport_class_to_rport(cdev
);
833 if ((rport
->port_state
== FC_PORTSTATE_BLOCKED
) ||
834 (rport
->port_state
== FC_PORTSTATE_DELETED
) ||
835 (rport
->port_state
== FC_PORTSTATE_NOTPRESENT
))
837 if (strncmp(buf
, "off", 3) == 0)
838 rport
->fast_io_fail_tmo
= -1;
840 val
= simple_strtoul(buf
, &cp
, 0);
841 if ((*cp
&& (*cp
!= '\n')) ||
842 (val
< 0) || (val
>= rport
->dev_loss_tmo
))
844 rport
->fast_io_fail_tmo
= val
;
848 static FC_CLASS_DEVICE_ATTR(rport
, fast_io_fail_tmo
, S_IRUGO
| S_IWUSR
,
849 show_fc_rport_fast_io_fail_tmo
, store_fc_rport_fast_io_fail_tmo
);
853 * FC SCSI Target Attribute Management
857 * Note: in the target show function we recognize when the remote
858 * port is in the hierarchy and do not allow the driver to get
859 * involved in sysfs functions. The driver only gets involved if
860 * it's the "old" style that doesn't use rports.
862 #define fc_starget_show_function(field, format_string, sz, cast) \
864 show_fc_starget_##field (struct class_device *cdev, char *buf) \
866 struct scsi_target *starget = transport_class_to_starget(cdev); \
867 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
868 struct fc_internal *i = to_fc_internal(shost->transportt); \
869 struct fc_rport *rport = starget_to_rport(starget); \
871 fc_starget_##field(starget) = rport->field; \
872 else if (i->f->get_starget_##field) \
873 i->f->get_starget_##field(starget); \
874 return snprintf(buf, sz, format_string, \
875 cast fc_starget_##field(starget)); \
878 #define fc_starget_rd_attr(field, format_string, sz) \
879 fc_starget_show_function(field, format_string, sz, ) \
880 static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \
881 show_fc_starget_##field, NULL)
883 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
884 fc_starget_show_function(field, format_string, sz, (cast)) \
885 static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \
886 show_fc_starget_##field, NULL)
888 #define SETUP_STARGET_ATTRIBUTE_RD(field) \
889 i->private_starget_attrs[count] = class_device_attr_starget_##field; \
890 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
891 i->private_starget_attrs[count].store = NULL; \
892 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
893 if (i->f->show_starget_##field) \
896 #define SETUP_STARGET_ATTRIBUTE_RW(field) \
897 i->private_starget_attrs[count] = class_device_attr_starget_##field; \
898 if (!i->f->set_starget_##field) { \
899 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
900 i->private_starget_attrs[count].store = NULL; \
902 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
903 if (i->f->show_starget_##field) \
906 /* The FC Transport SCSI Target Attributes: */
907 fc_starget_rd_attr_cast(node_name
, "0x%llx\n", 20, unsigned long long);
908 fc_starget_rd_attr_cast(port_name
, "0x%llx\n", 20, unsigned long long);
909 fc_starget_rd_attr(port_id
, "0x%06x\n", 20);
913 * Host Attribute Management
916 #define fc_host_show_function(field, format_string, sz, cast) \
918 show_fc_host_##field (struct class_device *cdev, char *buf) \
920 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
921 struct fc_internal *i = to_fc_internal(shost->transportt); \
922 if (i->f->get_host_##field) \
923 i->f->get_host_##field(shost); \
924 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
927 #define fc_host_store_function(field) \
929 store_fc_host_##field(struct class_device *cdev, const char *buf, \
933 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
934 struct fc_internal *i = to_fc_internal(shost->transportt); \
937 val = simple_strtoul(buf, &cp, 0); \
938 if (*cp && (*cp != '\n')) \
940 i->f->set_host_##field(shost, val); \
944 #define fc_host_store_str_function(field, slen) \
946 store_fc_host_##field(struct class_device *cdev, const char *buf, \
949 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
950 struct fc_internal *i = to_fc_internal(shost->transportt); \
951 unsigned int cnt=count; \
953 /* count may include a LF at end of string */ \
954 if (buf[cnt-1] == '\n') \
956 if (cnt > ((slen) - 1)) \
958 memcpy(fc_host_##field(shost), buf, cnt); \
959 i->f->set_host_##field(shost); \
963 #define fc_host_rd_attr(field, format_string, sz) \
964 fc_host_show_function(field, format_string, sz, ) \
965 static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
966 show_fc_host_##field, NULL)
968 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \
969 fc_host_show_function(field, format_string, sz, (cast)) \
970 static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
971 show_fc_host_##field, NULL)
973 #define fc_host_rw_attr(field, format_string, sz) \
974 fc_host_show_function(field, format_string, sz, ) \
975 fc_host_store_function(field) \
976 static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
977 show_fc_host_##field, \
978 store_fc_host_##field)
980 #define fc_host_rd_enum_attr(title, maxlen) \
982 show_fc_host_##title (struct class_device *cdev, char *buf) \
984 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
985 struct fc_internal *i = to_fc_internal(shost->transportt); \
987 if (i->f->get_host_##title) \
988 i->f->get_host_##title(shost); \
989 name = get_fc_##title##_name(fc_host_##title(shost)); \
992 return snprintf(buf, maxlen, "%s\n", name); \
994 static FC_CLASS_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
996 #define SETUP_HOST_ATTRIBUTE_RD(field) \
997 i->private_host_attrs[count] = class_device_attr_host_##field; \
998 i->private_host_attrs[count].attr.mode = S_IRUGO; \
999 i->private_host_attrs[count].store = NULL; \
1000 i->host_attrs[count] = &i->private_host_attrs[count]; \
1001 if (i->f->show_host_##field) \
1004 #define SETUP_HOST_ATTRIBUTE_RW(field) \
1005 i->private_host_attrs[count] = class_device_attr_host_##field; \
1006 if (!i->f->set_host_##field) { \
1007 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1008 i->private_host_attrs[count].store = NULL; \
1010 i->host_attrs[count] = &i->private_host_attrs[count]; \
1011 if (i->f->show_host_##field) \
1015 #define fc_private_host_show_function(field, format_string, sz, cast) \
1017 show_fc_host_##field (struct class_device *cdev, char *buf) \
1019 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
1020 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1023 #define fc_private_host_rd_attr(field, format_string, sz) \
1024 fc_private_host_show_function(field, format_string, sz, ) \
1025 static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
1026 show_fc_host_##field, NULL)
1028 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1029 fc_private_host_show_function(field, format_string, sz, (cast)) \
1030 static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
1031 show_fc_host_##field, NULL)
1033 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
1034 i->private_host_attrs[count] = class_device_attr_host_##field; \
1035 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1036 i->private_host_attrs[count].store = NULL; \
1037 i->host_attrs[count] = &i->private_host_attrs[count]; \
1040 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
1042 i->private_host_attrs[count] = class_device_attr_host_##field; \
1043 i->host_attrs[count] = &i->private_host_attrs[count]; \
1048 /* Fixed Host Attributes */
1051 show_fc_host_supported_classes (struct class_device
*cdev
, char *buf
)
1053 struct Scsi_Host
*shost
= transport_class_to_shost(cdev
);
1055 if (fc_host_supported_classes(shost
) == FC_COS_UNSPECIFIED
)
1056 return snprintf(buf
, 20, "unspecified\n");
1058 return get_fc_cos_names(fc_host_supported_classes(shost
), buf
);
1060 static FC_CLASS_DEVICE_ATTR(host
, supported_classes
, S_IRUGO
,
1061 show_fc_host_supported_classes
, NULL
);
1064 show_fc_host_supported_fc4s (struct class_device
*cdev
, char *buf
)
1066 struct Scsi_Host
*shost
= transport_class_to_shost(cdev
);
1067 return (ssize_t
)show_fc_fc4s(buf
, fc_host_supported_fc4s(shost
));
1069 static FC_CLASS_DEVICE_ATTR(host
, supported_fc4s
, S_IRUGO
,
1070 show_fc_host_supported_fc4s
, NULL
);
1073 show_fc_host_supported_speeds (struct class_device
*cdev
, char *buf
)
1075 struct Scsi_Host
*shost
= transport_class_to_shost(cdev
);
1077 if (fc_host_supported_speeds(shost
) == FC_PORTSPEED_UNKNOWN
)
1078 return snprintf(buf
, 20, "unknown\n");
1080 return get_fc_port_speed_names(fc_host_supported_speeds(shost
), buf
);
1082 static FC_CLASS_DEVICE_ATTR(host
, supported_speeds
, S_IRUGO
,
1083 show_fc_host_supported_speeds
, NULL
);
1086 fc_private_host_rd_attr_cast(node_name
, "0x%llx\n", 20, unsigned long long);
1087 fc_private_host_rd_attr_cast(port_name
, "0x%llx\n", 20, unsigned long long);
1088 fc_private_host_rd_attr_cast(permanent_port_name
, "0x%llx\n", 20,
1089 unsigned long long);
1090 fc_private_host_rd_attr(maxframe_size
, "%u bytes\n", 20);
1091 fc_private_host_rd_attr(serial_number
, "%s\n", (FC_SERIAL_NUMBER_SIZE
+1));
1094 /* Dynamic Host Attributes */
1097 show_fc_host_active_fc4s (struct class_device
*cdev
, char *buf
)
1099 struct Scsi_Host
*shost
= transport_class_to_shost(cdev
);
1100 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1102 if (i
->f
->get_host_active_fc4s
)
1103 i
->f
->get_host_active_fc4s(shost
);
1105 return (ssize_t
)show_fc_fc4s(buf
, fc_host_active_fc4s(shost
));
1107 static FC_CLASS_DEVICE_ATTR(host
, active_fc4s
, S_IRUGO
,
1108 show_fc_host_active_fc4s
, NULL
);
1111 show_fc_host_speed (struct class_device
*cdev
, char *buf
)
1113 struct Scsi_Host
*shost
= transport_class_to_shost(cdev
);
1114 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1116 if (i
->f
->get_host_speed
)
1117 i
->f
->get_host_speed(shost
);
1119 if (fc_host_speed(shost
) == FC_PORTSPEED_UNKNOWN
)
1120 return snprintf(buf
, 20, "unknown\n");
1122 return get_fc_port_speed_names(fc_host_speed(shost
), buf
);
1124 static FC_CLASS_DEVICE_ATTR(host
, speed
, S_IRUGO
,
1125 show_fc_host_speed
, NULL
);
1128 fc_host_rd_attr(port_id
, "0x%06x\n", 20);
1129 fc_host_rd_enum_attr(port_type
, FC_PORTTYPE_MAX_NAMELEN
);
1130 fc_host_rd_enum_attr(port_state
, FC_PORTSTATE_MAX_NAMELEN
);
1131 fc_host_rd_attr_cast(fabric_name
, "0x%llx\n", 20, unsigned long long);
1132 fc_host_rd_attr(symbolic_name
, "%s\n", FC_SYMBOLIC_NAME_SIZE
+ 1);
1134 fc_private_host_show_function(system_hostname
, "%s\n",
1135 FC_SYMBOLIC_NAME_SIZE
+ 1, )
1136 fc_host_store_str_function(system_hostname
, FC_SYMBOLIC_NAME_SIZE
)
1137 static FC_CLASS_DEVICE_ATTR(host
, system_hostname
, S_IRUGO
| S_IWUSR
,
1138 show_fc_host_system_hostname
, store_fc_host_system_hostname
);
1141 /* Private Host Attributes */
1144 show_fc_private_host_tgtid_bind_type(struct class_device
*cdev
, char *buf
)
1146 struct Scsi_Host
*shost
= transport_class_to_shost(cdev
);
1149 name
= get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost
));
1152 return snprintf(buf
, FC_BINDTYPE_MAX_NAMELEN
, "%s\n", name
);
1155 #define get_list_head_entry(pos, head, member) \
1156 pos = list_entry((head)->next, typeof(*pos), member)
1159 store_fc_private_host_tgtid_bind_type(struct class_device
*cdev
,
1160 const char *buf
, size_t count
)
1162 struct Scsi_Host
*shost
= transport_class_to_shost(cdev
);
1163 struct fc_rport
*rport
;
1164 enum fc_tgtid_binding_type val
;
1165 unsigned long flags
;
1167 if (get_fc_tgtid_bind_type_match(buf
, &val
))
1170 /* if changing bind type, purge all unused consistent bindings */
1171 if (val
!= fc_host_tgtid_bind_type(shost
)) {
1172 spin_lock_irqsave(shost
->host_lock
, flags
);
1173 while (!list_empty(&fc_host_rport_bindings(shost
))) {
1174 get_list_head_entry(rport
,
1175 &fc_host_rport_bindings(shost
), peers
);
1176 list_del(&rport
->peers
);
1177 rport
->port_state
= FC_PORTSTATE_DELETED
;
1178 fc_queue_work(shost
, &rport
->rport_delete_work
);
1180 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1183 fc_host_tgtid_bind_type(shost
) = val
;
1187 static FC_CLASS_DEVICE_ATTR(host
, tgtid_bind_type
, S_IRUGO
| S_IWUSR
,
1188 show_fc_private_host_tgtid_bind_type
,
1189 store_fc_private_host_tgtid_bind_type
);
1192 store_fc_private_host_issue_lip(struct class_device
*cdev
,
1193 const char *buf
, size_t count
)
1195 struct Scsi_Host
*shost
= transport_class_to_shost(cdev
);
1196 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1199 /* ignore any data value written to the attribute */
1200 if (i
->f
->issue_fc_host_lip
) {
1201 ret
= i
->f
->issue_fc_host_lip(shost
);
1202 return ret
? ret
: count
;
1208 static FC_CLASS_DEVICE_ATTR(host
, issue_lip
, S_IWUSR
, NULL
,
1209 store_fc_private_host_issue_lip
);
1212 * Host Statistics Management
1215 /* Show a given an attribute in the statistics group */
1217 fc_stat_show(const struct class_device
*cdev
, char *buf
, unsigned long offset
)
1219 struct Scsi_Host
*shost
= transport_class_to_shost(cdev
);
1220 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1221 struct fc_host_statistics
*stats
;
1222 ssize_t ret
= -ENOENT
;
1224 if (offset
> sizeof(struct fc_host_statistics
) ||
1225 offset
% sizeof(u64
) != 0)
1228 if (i
->f
->get_fc_host_stats
) {
1229 stats
= (i
->f
->get_fc_host_stats
)(shost
);
1231 ret
= snprintf(buf
, 20, "0x%llx\n",
1232 (unsigned long long)*(u64
*)(((u8
*) stats
) + offset
));
1238 /* generate a read-only statistics attribute */
1239 #define fc_host_statistic(name) \
1240 static ssize_t show_fcstat_##name(struct class_device *cd, char *buf) \
1242 return fc_stat_show(cd, buf, \
1243 offsetof(struct fc_host_statistics, name)); \
1245 static FC_CLASS_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1247 fc_host_statistic(seconds_since_last_reset
);
1248 fc_host_statistic(tx_frames
);
1249 fc_host_statistic(tx_words
);
1250 fc_host_statistic(rx_frames
);
1251 fc_host_statistic(rx_words
);
1252 fc_host_statistic(lip_count
);
1253 fc_host_statistic(nos_count
);
1254 fc_host_statistic(error_frames
);
1255 fc_host_statistic(dumped_frames
);
1256 fc_host_statistic(link_failure_count
);
1257 fc_host_statistic(loss_of_sync_count
);
1258 fc_host_statistic(loss_of_signal_count
);
1259 fc_host_statistic(prim_seq_protocol_err_count
);
1260 fc_host_statistic(invalid_tx_word_count
);
1261 fc_host_statistic(invalid_crc_count
);
1262 fc_host_statistic(fcp_input_requests
);
1263 fc_host_statistic(fcp_output_requests
);
1264 fc_host_statistic(fcp_control_requests
);
1265 fc_host_statistic(fcp_input_megabytes
);
1266 fc_host_statistic(fcp_output_megabytes
);
1269 fc_reset_statistics(struct class_device
*cdev
, const char *buf
,
1272 struct Scsi_Host
*shost
= transport_class_to_shost(cdev
);
1273 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1275 /* ignore any data value written to the attribute */
1276 if (i
->f
->reset_fc_host_stats
) {
1277 i
->f
->reset_fc_host_stats(shost
);
1283 static FC_CLASS_DEVICE_ATTR(host
, reset_statistics
, S_IWUSR
, NULL
,
1284 fc_reset_statistics
);
1287 static struct attribute
*fc_statistics_attrs
[] = {
1288 &class_device_attr_host_seconds_since_last_reset
.attr
,
1289 &class_device_attr_host_tx_frames
.attr
,
1290 &class_device_attr_host_tx_words
.attr
,
1291 &class_device_attr_host_rx_frames
.attr
,
1292 &class_device_attr_host_rx_words
.attr
,
1293 &class_device_attr_host_lip_count
.attr
,
1294 &class_device_attr_host_nos_count
.attr
,
1295 &class_device_attr_host_error_frames
.attr
,
1296 &class_device_attr_host_dumped_frames
.attr
,
1297 &class_device_attr_host_link_failure_count
.attr
,
1298 &class_device_attr_host_loss_of_sync_count
.attr
,
1299 &class_device_attr_host_loss_of_signal_count
.attr
,
1300 &class_device_attr_host_prim_seq_protocol_err_count
.attr
,
1301 &class_device_attr_host_invalid_tx_word_count
.attr
,
1302 &class_device_attr_host_invalid_crc_count
.attr
,
1303 &class_device_attr_host_fcp_input_requests
.attr
,
1304 &class_device_attr_host_fcp_output_requests
.attr
,
1305 &class_device_attr_host_fcp_control_requests
.attr
,
1306 &class_device_attr_host_fcp_input_megabytes
.attr
,
1307 &class_device_attr_host_fcp_output_megabytes
.attr
,
1308 &class_device_attr_host_reset_statistics
.attr
,
1312 static struct attribute_group fc_statistics_group
= {
1313 .name
= "statistics",
1314 .attrs
= fc_statistics_attrs
,
1317 static int fc_host_match(struct attribute_container
*cont
,
1320 struct Scsi_Host
*shost
;
1321 struct fc_internal
*i
;
1323 if (!scsi_is_host_device(dev
))
1326 shost
= dev_to_shost(dev
);
1327 if (!shost
->transportt
|| shost
->transportt
->host_attrs
.ac
.class
1328 != &fc_host_class
.class)
1331 i
= to_fc_internal(shost
->transportt
);
1333 return &i
->t
.host_attrs
.ac
== cont
;
1336 static int fc_target_match(struct attribute_container
*cont
,
1339 struct Scsi_Host
*shost
;
1340 struct fc_internal
*i
;
1342 if (!scsi_is_target_device(dev
))
1345 shost
= dev_to_shost(dev
->parent
);
1346 if (!shost
->transportt
|| shost
->transportt
->host_attrs
.ac
.class
1347 != &fc_host_class
.class)
1350 i
= to_fc_internal(shost
->transportt
);
1352 return &i
->t
.target_attrs
.ac
== cont
;
1355 static void fc_rport_dev_release(struct device
*dev
)
1357 struct fc_rport
*rport
= dev_to_rport(dev
);
1358 put_device(dev
->parent
);
1362 int scsi_is_fc_rport(const struct device
*dev
)
1364 return dev
->release
== fc_rport_dev_release
;
1366 EXPORT_SYMBOL(scsi_is_fc_rport
);
1368 static int fc_rport_match(struct attribute_container
*cont
,
1371 struct Scsi_Host
*shost
;
1372 struct fc_internal
*i
;
1374 if (!scsi_is_fc_rport(dev
))
1377 shost
= dev_to_shost(dev
->parent
);
1378 if (!shost
->transportt
|| shost
->transportt
->host_attrs
.ac
.class
1379 != &fc_host_class
.class)
1382 i
= to_fc_internal(shost
->transportt
);
1384 return &i
->rport_attr_cont
.ac
== cont
;
1389 * fc_timed_out - FC Transport I/O timeout intercept handler
1391 * @scmd: The SCSI command which timed out
1393 * This routine protects against error handlers getting invoked while a
1394 * rport is in a blocked state, typically due to a temporarily loss of
1395 * connectivity. If the error handlers are allowed to proceed, requests
1396 * to abort i/o, reset the target, etc will likely fail as there is no way
1397 * to communicate with the device to perform the requested function. These
1398 * failures may result in the midlayer taking the device offline, requiring
1399 * manual intervention to restore operation.
1401 * This routine, called whenever an i/o times out, validates the state of
1402 * the underlying rport. If the rport is blocked, it returns
1403 * EH_RESET_TIMER, which will continue to reschedule the timeout.
1404 * Eventually, either the device will return, or devloss_tmo will fire,
1405 * and when the timeout then fires, it will be handled normally.
1406 * If the rport is not blocked, normal error handling continues.
1409 * This routine assumes no locks are held on entry.
1411 static enum scsi_eh_timer_return
1412 fc_timed_out(struct scsi_cmnd
*scmd
)
1414 struct fc_rport
*rport
= starget_to_rport(scsi_target(scmd
->device
));
1416 if (rport
->port_state
== FC_PORTSTATE_BLOCKED
)
1417 return EH_RESET_TIMER
;
1419 return EH_NOT_HANDLED
;
1423 * Must be called with shost->host_lock held
1425 static int fc_user_scan(struct Scsi_Host
*shost
, uint channel
,
1428 struct fc_rport
*rport
;
1430 list_for_each_entry(rport
, &fc_host_rports(shost
), peers
) {
1431 if (rport
->scsi_target_id
== -1)
1434 if ((channel
== SCAN_WILD_CARD
|| channel
== rport
->channel
) &&
1435 (id
== SCAN_WILD_CARD
|| id
== rport
->scsi_target_id
)) {
1436 scsi_scan_target(&rport
->dev
, rport
->channel
,
1437 rport
->scsi_target_id
, lun
, 1);
1444 struct scsi_transport_template
*
1445 fc_attach_transport(struct fc_function_template
*ft
)
1448 struct fc_internal
*i
= kzalloc(sizeof(struct fc_internal
),
1454 i
->t
.target_attrs
.ac
.attrs
= &i
->starget_attrs
[0];
1455 i
->t
.target_attrs
.ac
.class = &fc_transport_class
.class;
1456 i
->t
.target_attrs
.ac
.match
= fc_target_match
;
1457 i
->t
.target_size
= sizeof(struct fc_starget_attrs
);
1458 transport_container_register(&i
->t
.target_attrs
);
1460 i
->t
.host_attrs
.ac
.attrs
= &i
->host_attrs
[0];
1461 i
->t
.host_attrs
.ac
.class = &fc_host_class
.class;
1462 i
->t
.host_attrs
.ac
.match
= fc_host_match
;
1463 i
->t
.host_size
= sizeof(struct fc_host_attrs
);
1464 if (ft
->get_fc_host_stats
)
1465 i
->t
.host_attrs
.statistics
= &fc_statistics_group
;
1466 transport_container_register(&i
->t
.host_attrs
);
1468 i
->rport_attr_cont
.ac
.attrs
= &i
->rport_attrs
[0];
1469 i
->rport_attr_cont
.ac
.class = &fc_rport_class
.class;
1470 i
->rport_attr_cont
.ac
.match
= fc_rport_match
;
1471 transport_container_register(&i
->rport_attr_cont
);
1475 /* Transport uses the shost workq for scsi scanning */
1476 i
->t
.create_work_queue
= 1;
1478 i
->t
.eh_timed_out
= fc_timed_out
;
1480 i
->t
.user_scan
= fc_user_scan
;
1483 * Setup SCSI Target Attributes.
1486 SETUP_STARGET_ATTRIBUTE_RD(node_name
);
1487 SETUP_STARGET_ATTRIBUTE_RD(port_name
);
1488 SETUP_STARGET_ATTRIBUTE_RD(port_id
);
1490 BUG_ON(count
> FC_STARGET_NUM_ATTRS
);
1492 i
->starget_attrs
[count
] = NULL
;
1496 * Setup SCSI Host Attributes.
1499 SETUP_HOST_ATTRIBUTE_RD(node_name
);
1500 SETUP_HOST_ATTRIBUTE_RD(port_name
);
1501 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name
);
1502 SETUP_HOST_ATTRIBUTE_RD(supported_classes
);
1503 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s
);
1504 SETUP_HOST_ATTRIBUTE_RD(supported_speeds
);
1505 SETUP_HOST_ATTRIBUTE_RD(maxframe_size
);
1506 SETUP_HOST_ATTRIBUTE_RD(serial_number
);
1508 SETUP_HOST_ATTRIBUTE_RD(port_id
);
1509 SETUP_HOST_ATTRIBUTE_RD(port_type
);
1510 SETUP_HOST_ATTRIBUTE_RD(port_state
);
1511 SETUP_HOST_ATTRIBUTE_RD(active_fc4s
);
1512 SETUP_HOST_ATTRIBUTE_RD(speed
);
1513 SETUP_HOST_ATTRIBUTE_RD(fabric_name
);
1514 SETUP_HOST_ATTRIBUTE_RD(symbolic_name
);
1515 SETUP_HOST_ATTRIBUTE_RW(system_hostname
);
1517 /* Transport-managed attributes */
1518 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type
);
1519 if (ft
->issue_fc_host_lip
)
1520 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip
);
1522 BUG_ON(count
> FC_HOST_NUM_ATTRS
);
1524 i
->host_attrs
[count
] = NULL
;
1527 * Setup Remote Port Attributes.
1530 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size
);
1531 SETUP_RPORT_ATTRIBUTE_RD(supported_classes
);
1532 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo
);
1533 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name
);
1534 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name
);
1535 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id
);
1536 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles
);
1537 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state
);
1538 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id
);
1539 if (ft
->terminate_rport_io
)
1540 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo
);
1542 BUG_ON(count
> FC_RPORT_NUM_ATTRS
);
1544 i
->rport_attrs
[count
] = NULL
;
1548 EXPORT_SYMBOL(fc_attach_transport
);
1550 void fc_release_transport(struct scsi_transport_template
*t
)
1552 struct fc_internal
*i
= to_fc_internal(t
);
1554 transport_container_unregister(&i
->t
.target_attrs
);
1555 transport_container_unregister(&i
->t
.host_attrs
);
1556 transport_container_unregister(&i
->rport_attr_cont
);
1560 EXPORT_SYMBOL(fc_release_transport
);
1563 * fc_queue_work - Queue work to the fc_host workqueue.
1564 * @shost: Pointer to Scsi_Host bound to fc_host.
1565 * @work: Work to queue for execution.
1568 * 1 - work queued for execution
1569 * 0 - work is already queued
1570 * -EINVAL - work queue doesn't exist
1573 fc_queue_work(struct Scsi_Host
*shost
, struct work_struct
*work
)
1575 if (unlikely(!fc_host_work_q(shost
))) {
1577 "ERROR: FC host '%s' attempted to queue work, "
1578 "when no workqueue created.\n", shost
->hostt
->name
);
1584 return queue_work(fc_host_work_q(shost
), work
);
1588 * fc_flush_work - Flush a fc_host's workqueue.
1589 * @shost: Pointer to Scsi_Host bound to fc_host.
1592 fc_flush_work(struct Scsi_Host
*shost
)
1594 if (!fc_host_work_q(shost
)) {
1596 "ERROR: FC host '%s' attempted to flush work, "
1597 "when no workqueue created.\n", shost
->hostt
->name
);
1602 flush_workqueue(fc_host_work_q(shost
));
1606 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
1607 * @shost: Pointer to Scsi_Host bound to fc_host.
1608 * @work: Work to queue for execution.
1609 * @delay: jiffies to delay the work queuing
1612 * 1 on success / 0 already queued / < 0 for error
1615 fc_queue_devloss_work(struct Scsi_Host
*shost
, struct delayed_work
*work
,
1616 unsigned long delay
)
1618 if (unlikely(!fc_host_devloss_work_q(shost
))) {
1620 "ERROR: FC host '%s' attempted to queue work, "
1621 "when no workqueue created.\n", shost
->hostt
->name
);
1627 return queue_delayed_work(fc_host_devloss_work_q(shost
), work
, delay
);
1631 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
1632 * @shost: Pointer to Scsi_Host bound to fc_host.
1635 fc_flush_devloss(struct Scsi_Host
*shost
)
1637 if (!fc_host_devloss_work_q(shost
)) {
1639 "ERROR: FC host '%s' attempted to flush work, "
1640 "when no workqueue created.\n", shost
->hostt
->name
);
1645 flush_workqueue(fc_host_devloss_work_q(shost
));
1650 * fc_remove_host - called to terminate any fc_transport-related elements
1652 * @rport: remote port to be unblocked.
1654 * This routine is expected to be called immediately preceeding the
1655 * a driver's call to scsi_remove_host().
1657 * WARNING: A driver utilizing the fc_transport, which fails to call
1658 * this routine prior to scsi_remote_host(), will leave dangling
1659 * objects in /sys/class/fc_remote_ports. Access to any of these
1660 * objects can result in a system crash !!!
1663 * This routine assumes no locks are held on entry.
1666 fc_remove_host(struct Scsi_Host
*shost
)
1668 struct fc_rport
*rport
, *next_rport
;
1669 struct workqueue_struct
*work_q
;
1670 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
1672 /* Remove any remote ports */
1673 list_for_each_entry_safe(rport
, next_rport
,
1674 &fc_host
->rports
, peers
) {
1675 list_del(&rport
->peers
);
1676 rport
->port_state
= FC_PORTSTATE_DELETED
;
1677 fc_queue_work(shost
, &rport
->rport_delete_work
);
1680 list_for_each_entry_safe(rport
, next_rport
,
1681 &fc_host
->rport_bindings
, peers
) {
1682 list_del(&rport
->peers
);
1683 rport
->port_state
= FC_PORTSTATE_DELETED
;
1684 fc_queue_work(shost
, &rport
->rport_delete_work
);
1687 /* flush all scan work items */
1688 scsi_flush_work(shost
);
1690 /* flush all stgt delete, and rport delete work items, then kill it */
1691 if (fc_host
->work_q
) {
1692 work_q
= fc_host
->work_q
;
1693 fc_host
->work_q
= NULL
;
1694 destroy_workqueue(work_q
);
1697 /* flush all devloss work items, then kill it */
1698 if (fc_host
->devloss_work_q
) {
1699 work_q
= fc_host
->devloss_work_q
;
1700 fc_host
->devloss_work_q
= NULL
;
1701 destroy_workqueue(work_q
);
1704 EXPORT_SYMBOL(fc_remove_host
);
1708 * fc_starget_delete - called to delete the scsi decendents of an rport
1709 * (target and all sdevs)
1711 * @work: remote port to be operated on.
1714 fc_starget_delete(struct work_struct
*work
)
1716 struct fc_rport
*rport
=
1717 container_of(work
, struct fc_rport
, stgt_delete_work
);
1718 struct Scsi_Host
*shost
= rport_to_shost(rport
);
1719 unsigned long flags
;
1720 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1723 * Involve the LLDD if possible. All io on the rport is to
1724 * be terminated, either as part of the dev_loss_tmo callback
1725 * processing, or via the terminate_rport_io function.
1727 if (i
->f
->dev_loss_tmo_callbk
)
1728 i
->f
->dev_loss_tmo_callbk(rport
);
1729 else if (i
->f
->terminate_rport_io
)
1730 i
->f
->terminate_rport_io(rport
);
1732 spin_lock_irqsave(shost
->host_lock
, flags
);
1733 if (rport
->flags
& FC_RPORT_DEVLOSS_PENDING
) {
1734 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1735 if (!cancel_delayed_work(&rport
->fail_io_work
))
1736 fc_flush_devloss(shost
);
1737 if (!cancel_delayed_work(&rport
->dev_loss_work
))
1738 fc_flush_devloss(shost
);
1739 spin_lock_irqsave(shost
->host_lock
, flags
);
1740 rport
->flags
&= ~FC_RPORT_DEVLOSS_PENDING
;
1742 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1744 scsi_remove_target(&rport
->dev
);
1749 * fc_rport_final_delete - finish rport termination and delete it.
1751 * @work: remote port to be deleted.
1754 fc_rport_final_delete(struct work_struct
*work
)
1756 struct fc_rport
*rport
=
1757 container_of(work
, struct fc_rport
, rport_delete_work
);
1758 struct device
*dev
= &rport
->dev
;
1759 struct Scsi_Host
*shost
= rport_to_shost(rport
);
1760 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
1763 * if a scan is pending, flush the SCSI Host work_q so that
1764 * that we can reclaim the rport scan work element.
1766 if (rport
->flags
& FC_RPORT_SCAN_PENDING
)
1767 scsi_flush_work(shost
);
1769 /* Delete SCSI target and sdevs */
1770 if (rport
->scsi_target_id
!= -1)
1771 fc_starget_delete(&rport
->stgt_delete_work
);
1772 else if (i
->f
->dev_loss_tmo_callbk
)
1773 i
->f
->dev_loss_tmo_callbk(rport
);
1774 else if (i
->f
->terminate_rport_io
)
1775 i
->f
->terminate_rport_io(rport
);
1777 transport_remove_device(dev
);
1779 transport_destroy_device(dev
);
1780 put_device(&shost
->shost_gendev
); /* for fc_host->rport list */
1781 put_device(dev
); /* for self-reference */
1786 * fc_rport_create - allocates and creates a remote FC port.
1787 * @shost: scsi host the remote port is connected to.
1788 * @channel: Channel on shost port connected to.
1789 * @ids: The world wide names, fc address, and FC4 port
1790 * roles for the remote port.
1792 * Allocates and creates the remoter port structure, including the
1793 * class and sysfs creation.
1796 * This routine assumes no locks are held on entry.
1799 fc_rport_create(struct Scsi_Host
*shost
, int channel
,
1800 struct fc_rport_identifiers
*ids
)
1802 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
1803 struct fc_internal
*fci
= to_fc_internal(shost
->transportt
);
1804 struct fc_rport
*rport
;
1806 unsigned long flags
;
1810 size
= (sizeof(struct fc_rport
) + fci
->f
->dd_fcrport_size
);
1811 rport
= kzalloc(size
, GFP_KERNEL
);
1812 if (unlikely(!rport
)) {
1813 printk(KERN_ERR
"%s: allocation failure\n", __FUNCTION__
);
1817 rport
->maxframe_size
= -1;
1818 rport
->supported_classes
= FC_COS_UNSPECIFIED
;
1819 rport
->dev_loss_tmo
= fc_dev_loss_tmo
;
1820 memcpy(&rport
->node_name
, &ids
->node_name
, sizeof(rport
->node_name
));
1821 memcpy(&rport
->port_name
, &ids
->port_name
, sizeof(rport
->port_name
));
1822 rport
->port_id
= ids
->port_id
;
1823 rport
->roles
= ids
->roles
;
1824 rport
->port_state
= FC_PORTSTATE_ONLINE
;
1825 if (fci
->f
->dd_fcrport_size
)
1826 rport
->dd_data
= &rport
[1];
1827 rport
->channel
= channel
;
1828 rport
->fast_io_fail_tmo
= -1;
1830 INIT_DELAYED_WORK(&rport
->dev_loss_work
, fc_timeout_deleted_rport
);
1831 INIT_DELAYED_WORK(&rport
->fail_io_work
, fc_timeout_fail_rport_io
);
1832 INIT_WORK(&rport
->scan_work
, fc_scsi_scan_rport
);
1833 INIT_WORK(&rport
->stgt_delete_work
, fc_starget_delete
);
1834 INIT_WORK(&rport
->rport_delete_work
, fc_rport_final_delete
);
1836 spin_lock_irqsave(shost
->host_lock
, flags
);
1838 rport
->number
= fc_host
->next_rport_number
++;
1839 if (rport
->roles
& FC_RPORT_ROLE_FCP_TARGET
)
1840 rport
->scsi_target_id
= fc_host
->next_target_id
++;
1842 rport
->scsi_target_id
= -1;
1843 list_add_tail(&rport
->peers
, &fc_host
->rports
);
1844 get_device(&shost
->shost_gendev
); /* for fc_host->rport list */
1846 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1849 device_initialize(dev
); /* takes self reference */
1850 dev
->parent
= get_device(&shost
->shost_gendev
); /* parent reference */
1851 dev
->release
= fc_rport_dev_release
;
1852 sprintf(dev
->bus_id
, "rport-%d:%d-%d",
1853 shost
->host_no
, channel
, rport
->number
);
1854 transport_setup_device(dev
);
1856 error
= device_add(dev
);
1858 printk(KERN_ERR
"FC Remote Port device_add failed\n");
1861 transport_add_device(dev
);
1862 transport_configure_device(dev
);
1864 if (rport
->roles
& FC_RPORT_ROLE_FCP_TARGET
) {
1865 /* initiate a scan of the target */
1866 rport
->flags
|= FC_RPORT_SCAN_PENDING
;
1867 scsi_queue_work(shost
, &rport
->scan_work
);
1873 transport_destroy_device(dev
);
1874 spin_lock_irqsave(shost
->host_lock
, flags
);
1875 list_del(&rport
->peers
);
1876 put_device(&shost
->shost_gendev
); /* for fc_host->rport list */
1877 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1878 put_device(dev
->parent
);
1884 * fc_remote_port_add - notifies the fc transport of the existence
1885 * of a remote FC port.
1886 * @shost: scsi host the remote port is connected to.
1887 * @channel: Channel on shost port connected to.
1888 * @ids: The world wide names, fc address, and FC4 port
1889 * roles for the remote port.
1891 * The LLDD calls this routine to notify the transport of the existence
1892 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
1893 * of the port, it's FC address (port_id), and the FC4 roles that are
1894 * active for the port.
1896 * For ports that are FCP targets (aka scsi targets), the FC transport
1897 * maintains consistent target id bindings on behalf of the LLDD.
1898 * A consistent target id binding is an assignment of a target id to
1899 * a remote port identifier, which persists while the scsi host is
1900 * attached. The remote port can disappear, then later reappear, and
1901 * it's target id assignment remains the same. This allows for shifts
1902 * in FC addressing (if binding by wwpn or wwnn) with no apparent
1903 * changes to the scsi subsystem which is based on scsi host number and
1904 * target id values. Bindings are only valid during the attachment of
1905 * the scsi host. If the host detaches, then later re-attaches, target
1906 * id bindings may change.
1908 * This routine is responsible for returning a remote port structure.
1909 * The routine will search the list of remote ports it maintains
1910 * internally on behalf of consistent target id mappings. If found, the
1911 * remote port structure will be reused. Otherwise, a new remote port
1912 * structure will be allocated.
1914 * Whenever a remote port is allocated, a new fc_remote_port class
1915 * device is created.
1917 * Should not be called from interrupt context.
1920 * This routine assumes no locks are held on entry.
1923 fc_remote_port_add(struct Scsi_Host
*shost
, int channel
,
1924 struct fc_rport_identifiers
*ids
)
1926 struct fc_internal
*fci
= to_fc_internal(shost
->transportt
);
1927 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
1928 struct fc_rport
*rport
;
1929 unsigned long flags
;
1932 /* ensure any stgt delete functions are done */
1933 fc_flush_work(shost
);
1936 * Search the list of "active" rports, for an rport that has been
1937 * deleted, but we've held off the real delete while the target
1938 * is in a "blocked" state.
1940 spin_lock_irqsave(shost
->host_lock
, flags
);
1942 list_for_each_entry(rport
, &fc_host
->rports
, peers
) {
1944 if ((rport
->port_state
== FC_PORTSTATE_BLOCKED
) &&
1945 (rport
->channel
== channel
)) {
1947 switch (fc_host
->tgtid_bind_type
) {
1948 case FC_TGTID_BIND_BY_WWPN
:
1949 case FC_TGTID_BIND_NONE
:
1950 if (rport
->port_name
== ids
->port_name
)
1953 case FC_TGTID_BIND_BY_WWNN
:
1954 if (rport
->node_name
== ids
->node_name
)
1957 case FC_TGTID_BIND_BY_ID
:
1958 if (rport
->port_id
== ids
->port_id
)
1964 struct delayed_work
*work
=
1965 &rport
->dev_loss_work
;
1967 memcpy(&rport
->node_name
, &ids
->node_name
,
1968 sizeof(rport
->node_name
));
1969 memcpy(&rport
->port_name
, &ids
->port_name
,
1970 sizeof(rport
->port_name
));
1971 rport
->port_id
= ids
->port_id
;
1973 rport
->port_state
= FC_PORTSTATE_ONLINE
;
1974 rport
->roles
= ids
->roles
;
1976 spin_unlock_irqrestore(shost
->host_lock
, flags
);
1978 if (fci
->f
->dd_fcrport_size
)
1979 memset(rport
->dd_data
, 0,
1980 fci
->f
->dd_fcrport_size
);
1983 * If we were blocked, we were a target.
1984 * If no longer a target, we leave the timer
1985 * running in case the port changes roles
1986 * prior to the timer expiring. If the timer
1987 * fires, the target will be torn down.
1989 if (!(ids
->roles
& FC_RPORT_ROLE_FCP_TARGET
))
1992 /* restart the target */
1995 * Stop the target timers first. Take no action
1996 * on the del_timer failure as the state
1997 * machine state change will validate the
2000 if (!cancel_delayed_work(&rport
->fail_io_work
))
2001 fc_flush_devloss(shost
);
2002 if (!cancel_delayed_work(work
))
2003 fc_flush_devloss(shost
);
2005 spin_lock_irqsave(shost
->host_lock
, flags
);
2007 rport
->flags
&= ~FC_RPORT_DEVLOSS_PENDING
;
2009 /* initiate a scan of the target */
2010 rport
->flags
|= FC_RPORT_SCAN_PENDING
;
2011 scsi_queue_work(shost
, &rport
->scan_work
);
2013 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2015 scsi_target_unblock(&rport
->dev
);
2022 /* Search the bindings array */
2023 if (fc_host
->tgtid_bind_type
!= FC_TGTID_BIND_NONE
) {
2025 /* search for a matching consistent binding */
2027 list_for_each_entry(rport
, &fc_host
->rport_bindings
,
2029 if (rport
->channel
!= channel
)
2032 switch (fc_host
->tgtid_bind_type
) {
2033 case FC_TGTID_BIND_BY_WWPN
:
2034 if (rport
->port_name
== ids
->port_name
)
2037 case FC_TGTID_BIND_BY_WWNN
:
2038 if (rport
->node_name
== ids
->node_name
)
2041 case FC_TGTID_BIND_BY_ID
:
2042 if (rport
->port_id
== ids
->port_id
)
2045 case FC_TGTID_BIND_NONE
: /* to keep compiler happy */
2050 list_move_tail(&rport
->peers
, &fc_host
->rports
);
2056 memcpy(&rport
->node_name
, &ids
->node_name
,
2057 sizeof(rport
->node_name
));
2058 memcpy(&rport
->port_name
, &ids
->port_name
,
2059 sizeof(rport
->port_name
));
2060 rport
->port_id
= ids
->port_id
;
2061 rport
->roles
= ids
->roles
;
2062 rport
->port_state
= FC_PORTSTATE_ONLINE
;
2064 if (fci
->f
->dd_fcrport_size
)
2065 memset(rport
->dd_data
, 0,
2066 fci
->f
->dd_fcrport_size
);
2068 if (rport
->roles
& FC_RPORT_ROLE_FCP_TARGET
) {
2069 /* initiate a scan of the target */
2070 rport
->flags
|= FC_RPORT_SCAN_PENDING
;
2071 scsi_queue_work(shost
, &rport
->scan_work
);
2072 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2073 scsi_target_unblock(&rport
->dev
);
2075 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2081 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2083 /* No consistent binding found - create new remote port entry */
2084 rport
= fc_rport_create(shost
, channel
, ids
);
2088 EXPORT_SYMBOL(fc_remote_port_add
);
2092 * fc_remote_port_delete - notifies the fc transport that a remote
2093 * port is no longer in existence.
2094 * @rport: The remote port that no longer exists
2096 * The LLDD calls this routine to notify the transport that a remote
2097 * port is no longer part of the topology. Note: Although a port
2098 * may no longer be part of the topology, it may persist in the remote
2099 * ports displayed by the fc_host. We do this under 2 conditions:
2100 * - If the port was a scsi target, we delay its deletion by "blocking" it.
2101 * This allows the port to temporarily disappear, then reappear without
2102 * disrupting the SCSI device tree attached to it. During the "blocked"
2103 * period the port will still exist.
2104 * - If the port was a scsi target and disappears for longer than we
2105 * expect, we'll delete the port and the tear down the SCSI device tree
2106 * attached to it. However, we want to semi-persist the target id assigned
2107 * to that port if it eventually does exist. The port structure will
2108 * remain (although with minimal information) so that the target id
2111 * If the remote port is not an FCP Target, it will be fully torn down
2112 * and deallocated, including the fc_remote_port class device.
2114 * If the remote port is an FCP Target, the port will be placed in a
2115 * temporary blocked state. From the LLDD's perspective, the rport no
2116 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2117 * exists, but all sdevs on it are blocked from further I/O. The following
2119 * If the remote port does not return (signaled by a LLDD call to
2120 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2121 * scsi target is removed - killing all outstanding i/o and removing the
2122 * scsi devices attached ot it. The port structure will be marked Not
2123 * Present and be partially cleared, leaving only enough information to
2124 * recognize the remote port relative to the scsi target id binding if
2125 * it later appears. The port will remain as long as there is a valid
2126 * binding (e.g. until the user changes the binding type or unloads the
2127 * scsi host with the binding).
2129 * If the remote port returns within the dev_loss_tmo value (and matches
2130 * according to the target id binding type), the port structure will be
2131 * reused. If it is no longer a SCSI target, the target will be torn
2132 * down. If it continues to be a SCSI target, then the target will be
2133 * unblocked (allowing i/o to be resumed), and a scan will be activated
2134 * to ensure that all luns are detected.
2136 * Called from normal process context only - cannot be called from interrupt.
2139 * This routine assumes no locks are held on entry.
2142 fc_remote_port_delete(struct fc_rport
*rport
)
2144 struct Scsi_Host
*shost
= rport_to_shost(rport
);
2145 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
2146 int timeout
= rport
->dev_loss_tmo
;
2147 unsigned long flags
;
2150 * No need to flush the fc_host work_q's, as all adds are synchronous.
2152 * We do need to reclaim the rport scan work element, so eventually
2153 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2154 * there's still a scan pending.
2157 spin_lock_irqsave(shost
->host_lock
, flags
);
2159 /* If no scsi target id mapping, delete it */
2160 if (rport
->scsi_target_id
== -1) {
2161 list_del(&rport
->peers
);
2162 rport
->port_state
= FC_PORTSTATE_DELETED
;
2163 fc_queue_work(shost
, &rport
->rport_delete_work
);
2164 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2168 rport
->port_state
= FC_PORTSTATE_BLOCKED
;
2170 rport
->flags
|= FC_RPORT_DEVLOSS_PENDING
;
2172 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2174 scsi_target_block(&rport
->dev
);
2176 /* see if we need to kill io faster than waiting for device loss */
2177 if ((rport
->fast_io_fail_tmo
!= -1) &&
2178 (rport
->fast_io_fail_tmo
< timeout
) && (i
->f
->terminate_rport_io
))
2179 fc_queue_devloss_work(shost
, &rport
->fail_io_work
,
2180 rport
->fast_io_fail_tmo
* HZ
);
2182 /* cap the length the devices can be blocked until they are deleted */
2183 fc_queue_devloss_work(shost
, &rport
->dev_loss_work
, timeout
* HZ
);
2185 EXPORT_SYMBOL(fc_remote_port_delete
);
2188 * fc_remote_port_rolechg - notifies the fc transport that the roles
2189 * on a remote may have changed.
2190 * @rport: The remote port that changed.
2192 * The LLDD calls this routine to notify the transport that the roles
2193 * on a remote port may have changed. The largest effect of this is
2194 * if a port now becomes a FCP Target, it must be allocated a
2195 * scsi target id. If the port is no longer a FCP target, any
2196 * scsi target id value assigned to it will persist in case the
2197 * role changes back to include FCP Target. No changes in the scsi
2198 * midlayer will be invoked if the role changes (in the expectation
2199 * that the role will be resumed. If it doesn't normal error processing
2202 * Should not be called from interrupt context.
2205 * This routine assumes no locks are held on entry.
2208 fc_remote_port_rolechg(struct fc_rport
*rport
, u32 roles
)
2210 struct Scsi_Host
*shost
= rport_to_shost(rport
);
2211 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
2212 unsigned long flags
;
2215 spin_lock_irqsave(shost
->host_lock
, flags
);
2216 if (roles
& FC_RPORT_ROLE_FCP_TARGET
) {
2217 if (rport
->scsi_target_id
== -1) {
2218 rport
->scsi_target_id
= fc_host
->next_target_id
++;
2220 } else if (!(rport
->roles
& FC_RPORT_ROLE_FCP_TARGET
))
2224 rport
->roles
= roles
;
2226 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2230 * There may have been a delete timer running on the
2231 * port. Ensure that it is cancelled as we now know
2232 * the port is an FCP Target.
2233 * Note: we know the rport is exists and in an online
2234 * state as the LLDD would not have had an rport
2235 * reference to pass us.
2237 * Take no action on the del_timer failure as the state
2238 * machine state change will validate the
2241 if (!cancel_delayed_work(&rport
->fail_io_work
))
2242 fc_flush_devloss(shost
);
2243 if (!cancel_delayed_work(&rport
->dev_loss_work
))
2244 fc_flush_devloss(shost
);
2246 spin_lock_irqsave(shost
->host_lock
, flags
);
2247 rport
->flags
&= ~FC_RPORT_DEVLOSS_PENDING
;
2248 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2250 /* ensure any stgt delete functions are done */
2251 fc_flush_work(shost
);
2253 /* initiate a scan of the target */
2254 spin_lock_irqsave(shost
->host_lock
, flags
);
2255 rport
->flags
|= FC_RPORT_SCAN_PENDING
;
2256 scsi_queue_work(shost
, &rport
->scan_work
);
2257 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2258 scsi_target_unblock(&rport
->dev
);
2261 EXPORT_SYMBOL(fc_remote_port_rolechg
);
2264 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port that
2265 * was a SCSI target (thus was blocked), and failed
2266 * to return in the alloted time.
2268 * @work: rport target that failed to reappear in the alloted time.
2271 fc_timeout_deleted_rport(struct work_struct
*work
)
2273 struct fc_rport
*rport
=
2274 container_of(work
, struct fc_rport
, dev_loss_work
.work
);
2275 struct Scsi_Host
*shost
= rport_to_shost(rport
);
2276 struct fc_host_attrs
*fc_host
= shost_to_fc_host(shost
);
2277 unsigned long flags
;
2279 spin_lock_irqsave(shost
->host_lock
, flags
);
2281 rport
->flags
&= ~FC_RPORT_DEVLOSS_PENDING
;
2284 * If the port is ONLINE, then it came back. Validate it's still an
2285 * FCP target. If not, tear down the scsi_target on it.
2287 if ((rport
->port_state
== FC_PORTSTATE_ONLINE
) &&
2288 !(rport
->roles
& FC_RPORT_ROLE_FCP_TARGET
)) {
2289 dev_printk(KERN_ERR
, &rport
->dev
,
2290 "blocked FC remote port time out: no longer"
2291 " a FCP target, removing starget\n");
2292 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2293 scsi_target_unblock(&rport
->dev
);
2294 fc_queue_work(shost
, &rport
->stgt_delete_work
);
2298 if (rport
->port_state
!= FC_PORTSTATE_BLOCKED
) {
2299 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2300 dev_printk(KERN_ERR
, &rport
->dev
,
2301 "blocked FC remote port time out: leaving target alone\n");
2305 if (fc_host
->tgtid_bind_type
== FC_TGTID_BIND_NONE
) {
2306 list_del(&rport
->peers
);
2307 rport
->port_state
= FC_PORTSTATE_DELETED
;
2308 dev_printk(KERN_ERR
, &rport
->dev
,
2309 "blocked FC remote port time out: removing target\n");
2310 fc_queue_work(shost
, &rport
->rport_delete_work
);
2311 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2315 dev_printk(KERN_ERR
, &rport
->dev
,
2316 "blocked FC remote port time out: removing target and "
2317 "saving binding\n");
2319 list_move_tail(&rport
->peers
, &fc_host
->rport_bindings
);
2322 * Note: We do not remove or clear the hostdata area. This allows
2323 * host-specific target data to persist along with the
2324 * scsi_target_id. It's up to the host to manage it's hostdata area.
2328 * Reinitialize port attributes that may change if the port comes back.
2330 rport
->maxframe_size
= -1;
2331 rport
->supported_classes
= FC_COS_UNSPECIFIED
;
2332 rport
->roles
= FC_RPORT_ROLE_UNKNOWN
;
2333 rport
->port_state
= FC_PORTSTATE_NOTPRESENT
;
2335 /* remove the identifiers that aren't used in the consisting binding */
2336 switch (fc_host
->tgtid_bind_type
) {
2337 case FC_TGTID_BIND_BY_WWPN
:
2338 rport
->node_name
= -1;
2339 rport
->port_id
= -1;
2341 case FC_TGTID_BIND_BY_WWNN
:
2342 rport
->port_name
= -1;
2343 rport
->port_id
= -1;
2345 case FC_TGTID_BIND_BY_ID
:
2346 rport
->node_name
= -1;
2347 rport
->port_name
= -1;
2349 case FC_TGTID_BIND_NONE
: /* to keep compiler happy */
2354 * As this only occurs if the remote port (scsi target)
2355 * went away and didn't come back - we'll remove
2356 * all attached scsi devices.
2358 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2360 scsi_target_unblock(&rport
->dev
);
2361 fc_queue_work(shost
, &rport
->stgt_delete_work
);
2365 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a
2366 * disconnected SCSI target.
2368 * @work: rport to terminate io on.
2370 * Notes: Only requests the failure of the io, not that all are flushed
2371 * prior to returning.
2374 fc_timeout_fail_rport_io(struct work_struct
*work
)
2376 struct fc_rport
*rport
=
2377 container_of(work
, struct fc_rport
, fail_io_work
.work
);
2378 struct Scsi_Host
*shost
= rport_to_shost(rport
);
2379 struct fc_internal
*i
= to_fc_internal(shost
->transportt
);
2381 if (rport
->port_state
!= FC_PORTSTATE_BLOCKED
)
2384 i
->f
->terminate_rport_io(rport
);
2388 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
2390 * @work: remote port to be scanned.
2393 fc_scsi_scan_rport(struct work_struct
*work
)
2395 struct fc_rport
*rport
=
2396 container_of(work
, struct fc_rport
, scan_work
);
2397 struct Scsi_Host
*shost
= rport_to_shost(rport
);
2398 unsigned long flags
;
2400 if ((rport
->port_state
== FC_PORTSTATE_ONLINE
) &&
2401 (rport
->roles
& FC_RPORT_ROLE_FCP_TARGET
)) {
2402 scsi_scan_target(&rport
->dev
, rport
->channel
,
2403 rport
->scsi_target_id
, SCAN_WILD_CARD
, 1);
2406 spin_lock_irqsave(shost
->host_lock
, flags
);
2407 rport
->flags
&= ~FC_RPORT_SCAN_PENDING
;
2408 spin_unlock_irqrestore(shost
->host_lock
, flags
);
2412 MODULE_AUTHOR("Martin Hicks");
2413 MODULE_DESCRIPTION("FC Transport Attributes");
2414 MODULE_LICENSE("GPL");
2416 module_init(fc_transport_init
);
2417 module_exit(fc_transport_exit
);