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 <linux/bsg-lib.h>
34 #include <scsi/scsi_device.h>
35 #include <scsi/scsi_host.h>
36 #include <scsi/scsi_transport.h>
37 #include <scsi/scsi_transport_fc.h>
38 #include <scsi/scsi_cmnd.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"
44 static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
45 static void fc_vport_sched_delete(struct work_struct *work);
46 static int fc_vport_setup(struct Scsi_Host *shost, int channel,
47 struct device *pdev, struct fc_vport_identifiers *ids,
48 struct fc_vport **vport);
49 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
50 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
51 static void fc_bsg_remove(struct request_queue *);
52 static void fc_bsg_goose_queue(struct fc_rport *);
59 * dev_loss_tmo: the default number of seconds that the FC transport
60 * should insulate the loss of a remote port.
61 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
63 static unsigned int fc_dev_loss_tmo = 60; /* seconds */
65 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
66 MODULE_PARM_DESC(dev_loss_tmo,
67 "Maximum number of seconds that the FC transport should"
68 " insulate the loss of a remote port. Once this value is"
69 " exceeded, the scsi target is removed. Value should be"
70 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
71 " fast_io_fail_tmo is not set.");
74 * Redefine so that we can have same named attributes in the
75 * sdev/starget/host objects.
77 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
78 struct device_attribute device_attr_##_prefix##_##_name = \
79 __ATTR(_name,_mode,_show,_store)
81 #define fc_enum_name_search(title, table_type, table) \
82 static const char *get_fc_##title##_name(enum table_type table_key) \
87 for (i = 0; i < ARRAY_SIZE(table); i++) { \
88 if (table[i].value == table_key) { \
89 name = table[i].name; \
96 #define fc_enum_name_match(title, table_type, table) \
97 static int get_fc_##title##_match(const char *table_key, \
98 enum table_type *value) \
102 for (i = 0; i < ARRAY_SIZE(table); i++) { \
103 if (strncmp(table_key, table[i].name, \
104 table[i].matchlen) == 0) { \
105 *value = table[i].value; \
106 return 0; /* success */ \
109 return 1; /* failure */ \
113 /* Convert fc_port_type values to ascii string name */
115 enum fc_port_type value;
117 } fc_port_type_names[] = {
118 { FC_PORTTYPE_UNKNOWN, "Unknown" },
119 { FC_PORTTYPE_OTHER, "Other" },
120 { FC_PORTTYPE_NOTPRESENT, "Not Present" },
121 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
122 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
123 { FC_PORTTYPE_LPORT, "LPort (private loop)" },
124 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" },
125 { FC_PORTTYPE_NPIV, "NPIV VPORT" },
127 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
128 #define FC_PORTTYPE_MAX_NAMELEN 50
130 /* Reuse fc_port_type enum function for vport_type */
131 #define get_fc_vport_type_name get_fc_port_type_name
134 /* Convert fc_host_event_code values to ascii string name */
135 static const struct {
136 enum fc_host_event_code value;
138 } fc_host_event_code_names[] = {
139 { FCH_EVT_LIP, "lip" },
140 { FCH_EVT_LINKUP, "link_up" },
141 { FCH_EVT_LINKDOWN, "link_down" },
142 { FCH_EVT_LIPRESET, "lip_reset" },
143 { FCH_EVT_RSCN, "rscn" },
144 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
145 { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
146 { FCH_EVT_PORT_ONLINE, "port_online" },
147 { FCH_EVT_PORT_OFFLINE, "port_offline" },
148 { FCH_EVT_PORT_FABRIC, "port_fabric" },
149 { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
150 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
152 fc_enum_name_search(host_event_code, fc_host_event_code,
153 fc_host_event_code_names)
154 #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
157 /* Convert fc_port_state values to ascii string name */
159 enum fc_port_state value;
161 } fc_port_state_names[] = {
162 { FC_PORTSTATE_UNKNOWN, "Unknown" },
163 { FC_PORTSTATE_NOTPRESENT, "Not Present" },
164 { FC_PORTSTATE_ONLINE, "Online" },
165 { FC_PORTSTATE_OFFLINE, "Offline" },
166 { FC_PORTSTATE_BLOCKED, "Blocked" },
167 { FC_PORTSTATE_BYPASSED, "Bypassed" },
168 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
169 { FC_PORTSTATE_LINKDOWN, "Linkdown" },
170 { FC_PORTSTATE_ERROR, "Error" },
171 { FC_PORTSTATE_LOOPBACK, "Loopback" },
172 { FC_PORTSTATE_DELETED, "Deleted" },
174 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
175 #define FC_PORTSTATE_MAX_NAMELEN 20
178 /* Convert fc_vport_state values to ascii string name */
180 enum fc_vport_state value;
182 } fc_vport_state_names[] = {
183 { FC_VPORT_UNKNOWN, "Unknown" },
184 { FC_VPORT_ACTIVE, "Active" },
185 { FC_VPORT_DISABLED, "Disabled" },
186 { FC_VPORT_LINKDOWN, "Linkdown" },
187 { FC_VPORT_INITIALIZING, "Initializing" },
188 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" },
189 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" },
190 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" },
191 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" },
192 { FC_VPORT_FAILED, "VPort Failed" },
194 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
195 #define FC_VPORTSTATE_MAX_NAMELEN 24
197 /* Reuse fc_vport_state enum function for vport_last_state */
198 #define get_fc_vport_last_state_name get_fc_vport_state_name
201 /* Convert fc_tgtid_binding_type values to ascii string name */
202 static const struct {
203 enum fc_tgtid_binding_type value;
206 } fc_tgtid_binding_type_names[] = {
207 { FC_TGTID_BIND_NONE, "none", 4 },
208 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
209 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
210 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
212 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
213 fc_tgtid_binding_type_names)
214 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
215 fc_tgtid_binding_type_names)
216 #define FC_BINDTYPE_MAX_NAMELEN 30
219 #define fc_bitfield_name_search(title, table) \
221 get_fc_##title##_names(u32 table_key, char *buf) \
227 for (i = 0; i < ARRAY_SIZE(table); i++) { \
228 if (table[i].value & table_key) { \
229 len += sprintf(buf + len, "%s%s", \
230 prefix, table[i].name); \
234 len += sprintf(buf + len, "\n"); \
239 /* Convert FC_COS bit values to ascii string name */
240 static const struct {
244 { FC_COS_CLASS1, "Class 1" },
245 { FC_COS_CLASS2, "Class 2" },
246 { FC_COS_CLASS3, "Class 3" },
247 { FC_COS_CLASS4, "Class 4" },
248 { FC_COS_CLASS6, "Class 6" },
250 fc_bitfield_name_search(cos, fc_cos_names)
253 /* Convert FC_PORTSPEED bit values to ascii string name */
254 static const struct {
257 } fc_port_speed_names[] = {
258 { FC_PORTSPEED_1GBIT, "1 Gbit" },
259 { FC_PORTSPEED_2GBIT, "2 Gbit" },
260 { FC_PORTSPEED_4GBIT, "4 Gbit" },
261 { FC_PORTSPEED_10GBIT, "10 Gbit" },
262 { FC_PORTSPEED_8GBIT, "8 Gbit" },
263 { FC_PORTSPEED_16GBIT, "16 Gbit" },
264 { FC_PORTSPEED_32GBIT, "32 Gbit" },
265 { FC_PORTSPEED_20GBIT, "20 Gbit" },
266 { FC_PORTSPEED_40GBIT, "40 Gbit" },
267 { FC_PORTSPEED_50GBIT, "50 Gbit" },
268 { FC_PORTSPEED_100GBIT, "100 Gbit" },
269 { FC_PORTSPEED_25GBIT, "25 Gbit" },
270 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
272 fc_bitfield_name_search(port_speed, fc_port_speed_names)
276 show_fc_fc4s (char *buf, u8 *fc4_list)
280 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
281 len += sprintf(buf + len , "0x%02x ", *fc4_list);
282 len += sprintf(buf + len, "\n");
287 /* Convert FC_PORT_ROLE bit values to ascii string name */
288 static const struct {
291 } fc_port_role_names[] = {
292 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" },
293 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
294 { FC_PORT_ROLE_IP_PORT, "IP Port" },
296 fc_bitfield_name_search(port_roles, fc_port_role_names)
299 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
301 #define FC_WELLKNOWN_PORTID_MASK 0xfffff0
302 #define FC_WELLKNOWN_ROLE_MASK 0x00000f
303 #define FC_FPORT_PORTID 0x00000e
304 #define FC_FABCTLR_PORTID 0x00000d
305 #define FC_DIRSRVR_PORTID 0x00000c
306 #define FC_TIMESRVR_PORTID 0x00000b
307 #define FC_MGMTSRVR_PORTID 0x00000a
310 static void fc_timeout_deleted_rport(struct work_struct *work);
311 static void fc_timeout_fail_rport_io(struct work_struct *work);
312 static void fc_scsi_scan_rport(struct work_struct *work);
315 * Attribute counts pre object type...
316 * Increase these values if you add attributes
318 #define FC_STARGET_NUM_ATTRS 3
319 #define FC_RPORT_NUM_ATTRS 10
320 #define FC_VPORT_NUM_ATTRS 9
321 #define FC_HOST_NUM_ATTRS 29
324 struct scsi_transport_template t;
325 struct fc_function_template *f;
328 * For attributes : each object has :
329 * An array of the actual attributes structures
330 * An array of null-terminated pointers to the attribute
331 * structures - used for mid-layer interaction.
333 * The attribute containers for the starget and host are are
334 * part of the midlayer. As the remote port is specific to the
335 * fc transport, we must provide the attribute container.
337 struct device_attribute private_starget_attrs[
338 FC_STARGET_NUM_ATTRS];
339 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
341 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
342 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
344 struct transport_container rport_attr_cont;
345 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
346 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
348 struct transport_container vport_attr_cont;
349 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
350 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
353 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
355 static int fc_target_setup(struct transport_container *tc, struct device *dev,
358 struct scsi_target *starget = to_scsi_target(dev);
359 struct fc_rport *rport = starget_to_rport(starget);
362 * if parent is remote port, use values from remote port.
363 * Otherwise, this host uses the fc_transport, but not the
364 * remote port interface. As such, initialize to known non-values.
367 fc_starget_node_name(starget) = rport->node_name;
368 fc_starget_port_name(starget) = rport->port_name;
369 fc_starget_port_id(starget) = rport->port_id;
371 fc_starget_node_name(starget) = -1;
372 fc_starget_port_name(starget) = -1;
373 fc_starget_port_id(starget) = -1;
379 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
385 static int fc_host_setup(struct transport_container *tc, struct device *dev,
388 struct Scsi_Host *shost = dev_to_shost(dev);
389 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
392 * Set default values easily detected by the midlayer as
393 * failure cases. The scsi lldd is responsible for initializing
394 * all transport attributes to valid values per host.
396 fc_host->node_name = -1;
397 fc_host->port_name = -1;
398 fc_host->permanent_port_name = -1;
399 fc_host->supported_classes = FC_COS_UNSPECIFIED;
400 memset(fc_host->supported_fc4s, 0,
401 sizeof(fc_host->supported_fc4s));
402 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
403 fc_host->maxframe_size = -1;
404 fc_host->max_npiv_vports = 0;
405 memset(fc_host->serial_number, 0,
406 sizeof(fc_host->serial_number));
407 memset(fc_host->manufacturer, 0,
408 sizeof(fc_host->manufacturer));
409 memset(fc_host->model, 0,
410 sizeof(fc_host->model));
411 memset(fc_host->model_description, 0,
412 sizeof(fc_host->model_description));
413 memset(fc_host->hardware_version, 0,
414 sizeof(fc_host->hardware_version));
415 memset(fc_host->driver_version, 0,
416 sizeof(fc_host->driver_version));
417 memset(fc_host->firmware_version, 0,
418 sizeof(fc_host->firmware_version));
419 memset(fc_host->optionrom_version, 0,
420 sizeof(fc_host->optionrom_version));
422 fc_host->port_id = -1;
423 fc_host->port_type = FC_PORTTYPE_UNKNOWN;
424 fc_host->port_state = FC_PORTSTATE_UNKNOWN;
425 memset(fc_host->active_fc4s, 0,
426 sizeof(fc_host->active_fc4s));
427 fc_host->speed = FC_PORTSPEED_UNKNOWN;
428 fc_host->fabric_name = -1;
429 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
430 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
432 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
434 INIT_LIST_HEAD(&fc_host->rports);
435 INIT_LIST_HEAD(&fc_host->rport_bindings);
436 INIT_LIST_HEAD(&fc_host->vports);
437 fc_host->next_rport_number = 0;
438 fc_host->next_target_id = 0;
439 fc_host->next_vport_number = 0;
440 fc_host->npiv_vports_inuse = 0;
442 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
443 "fc_wq_%d", shost->host_no);
444 fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
445 if (!fc_host->work_q)
448 fc_host->dev_loss_tmo = fc_dev_loss_tmo;
449 snprintf(fc_host->devloss_work_q_name,
450 sizeof(fc_host->devloss_work_q_name),
451 "fc_dl_%d", shost->host_no);
452 fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
453 fc_host->devloss_work_q_name);
454 if (!fc_host->devloss_work_q) {
455 destroy_workqueue(fc_host->work_q);
456 fc_host->work_q = NULL;
460 fc_bsg_hostadd(shost, fc_host);
461 /* ignore any bsg add error - we just can't do sgio */
466 static int fc_host_remove(struct transport_container *tc, struct device *dev,
469 struct Scsi_Host *shost = dev_to_shost(dev);
470 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
472 fc_bsg_remove(fc_host->rqst_q);
476 static DECLARE_TRANSPORT_CLASS(fc_host_class,
483 * Setup and Remove actions for remote ports are handled
484 * in the service functions below.
486 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
493 * Setup and Remove actions for virtual ports are handled
494 * in the service functions below.
496 static DECLARE_TRANSPORT_CLASS(fc_vport_class,
503 * Netlink Infrastructure
506 static atomic_t fc_event_seq;
509 * fc_get_event_number - Obtain the next sequential FC event number
512 * We could have inlined this, but it would have required fc_event_seq to
513 * be exposed. For now, live with the subroutine call.
514 * Atomic used to avoid lock/unlock...
517 fc_get_event_number(void)
519 return atomic_add_return(1, &fc_event_seq);
521 EXPORT_SYMBOL(fc_get_event_number);
525 * fc_host_post_event - called to post an even on an fc_host.
526 * @shost: host the event occurred on
527 * @event_number: fc event number obtained from get_fc_event_number()
528 * @event_code: fc_host event being posted
529 * @event_data: 32bits of data for the event being posted
532 * This routine assumes no locks are held on entry.
535 fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
536 enum fc_host_event_code event_code, u32 event_data)
539 struct nlmsghdr *nlh;
540 struct fc_nl_event *event;
550 len = FC_NL_MSGALIGN(sizeof(*event));
552 skb = nlmsg_new(len, GFP_KERNEL);
558 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
563 event = nlmsg_data(nlh);
565 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
566 FC_NL_ASYNC_EVENT, len);
567 event->seconds = get_seconds();
568 event->vendor_id = 0;
569 event->host_no = shost->host_no;
570 event->event_datalen = sizeof(u32); /* bytes */
571 event->event_num = event_number;
572 event->event_code = event_code;
573 event->event_data = event_data;
575 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
582 name = get_fc_host_event_code_name(event_code);
584 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
585 __func__, shost->host_no,
586 (name) ? name : "<unknown>", event_data, err);
589 EXPORT_SYMBOL(fc_host_post_event);
593 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
594 * @shost: host the event occurred on
595 * @event_number: fc event number obtained from get_fc_event_number()
596 * @data_len: amount, in bytes, of vendor unique data
597 * @data_buf: pointer to vendor unique data
598 * @vendor_id: Vendor id
601 * This routine assumes no locks are held on entry.
604 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
605 u32 data_len, char * data_buf, u64 vendor_id)
608 struct nlmsghdr *nlh;
609 struct fc_nl_event *event;
615 goto send_vendor_fail;
618 len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
620 skb = nlmsg_new(len, GFP_KERNEL);
623 goto send_vendor_fail;
626 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
629 goto send_vendor_fail_skb;
631 event = nlmsg_data(nlh);
633 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
634 FC_NL_ASYNC_EVENT, len);
635 event->seconds = get_seconds();
636 event->vendor_id = vendor_id;
637 event->host_no = shost->host_no;
638 event->event_datalen = data_len; /* bytes */
639 event->event_num = event_number;
640 event->event_code = FCH_EVT_VENDOR_UNIQUE;
641 memcpy(&event->event_data, data_buf, data_len);
643 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
647 send_vendor_fail_skb:
651 "%s: Dropped Event : host %d vendor_unique - err %d\n",
652 __func__, shost->host_no, err);
655 EXPORT_SYMBOL(fc_host_post_vendor_event);
659 static __init int fc_transport_init(void)
663 atomic_set(&fc_event_seq, 0);
665 error = transport_class_register(&fc_host_class);
668 error = transport_class_register(&fc_vport_class);
670 goto unreg_host_class;
671 error = transport_class_register(&fc_rport_class);
673 goto unreg_vport_class;
674 error = transport_class_register(&fc_transport_class);
676 goto unreg_rport_class;
680 transport_class_unregister(&fc_rport_class);
682 transport_class_unregister(&fc_vport_class);
684 transport_class_unregister(&fc_host_class);
688 static void __exit fc_transport_exit(void)
690 transport_class_unregister(&fc_transport_class);
691 transport_class_unregister(&fc_rport_class);
692 transport_class_unregister(&fc_host_class);
693 transport_class_unregister(&fc_vport_class);
697 * FC Remote Port Attribute Management
700 #define fc_rport_show_function(field, format_string, sz, cast) \
702 show_fc_rport_##field (struct device *dev, \
703 struct device_attribute *attr, char *buf) \
705 struct fc_rport *rport = transport_class_to_rport(dev); \
706 struct Scsi_Host *shost = rport_to_shost(rport); \
707 struct fc_internal *i = to_fc_internal(shost->transportt); \
708 if ((i->f->get_rport_##field) && \
709 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
710 (rport->port_state == FC_PORTSTATE_DELETED) || \
711 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
712 i->f->get_rport_##field(rport); \
713 return snprintf(buf, sz, format_string, cast rport->field); \
716 #define fc_rport_store_function(field) \
718 store_fc_rport_##field(struct device *dev, \
719 struct device_attribute *attr, \
720 const char *buf, size_t count) \
723 struct fc_rport *rport = transport_class_to_rport(dev); \
724 struct Scsi_Host *shost = rport_to_shost(rport); \
725 struct fc_internal *i = to_fc_internal(shost->transportt); \
727 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
728 (rport->port_state == FC_PORTSTATE_DELETED) || \
729 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
731 val = simple_strtoul(buf, &cp, 0); \
732 if (*cp && (*cp != '\n')) \
734 i->f->set_rport_##field(rport, val); \
738 #define fc_rport_rd_attr(field, format_string, sz) \
739 fc_rport_show_function(field, format_string, sz, ) \
740 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
741 show_fc_rport_##field, NULL)
743 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
744 fc_rport_show_function(field, format_string, sz, (cast)) \
745 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
746 show_fc_rport_##field, NULL)
748 #define fc_rport_rw_attr(field, format_string, sz) \
749 fc_rport_show_function(field, format_string, sz, ) \
750 fc_rport_store_function(field) \
751 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
752 show_fc_rport_##field, \
753 store_fc_rport_##field)
756 #define fc_private_rport_show_function(field, format_string, sz, cast) \
758 show_fc_rport_##field (struct device *dev, \
759 struct device_attribute *attr, char *buf) \
761 struct fc_rport *rport = transport_class_to_rport(dev); \
762 return snprintf(buf, sz, format_string, cast rport->field); \
765 #define fc_private_rport_rd_attr(field, format_string, sz) \
766 fc_private_rport_show_function(field, format_string, sz, ) \
767 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
768 show_fc_rport_##field, NULL)
770 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
771 fc_private_rport_show_function(field, format_string, sz, (cast)) \
772 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
773 show_fc_rport_##field, NULL)
776 #define fc_private_rport_rd_enum_attr(title, maxlen) \
778 show_fc_rport_##title (struct device *dev, \
779 struct device_attribute *attr, char *buf) \
781 struct fc_rport *rport = transport_class_to_rport(dev); \
783 name = get_fc_##title##_name(rport->title); \
786 return snprintf(buf, maxlen, "%s\n", name); \
788 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
789 show_fc_rport_##title, NULL)
792 #define SETUP_RPORT_ATTRIBUTE_RD(field) \
793 i->private_rport_attrs[count] = device_attr_rport_##field; \
794 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
795 i->private_rport_attrs[count].store = NULL; \
796 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
797 if (i->f->show_rport_##field) \
800 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
801 i->private_rport_attrs[count] = device_attr_rport_##field; \
802 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
803 i->private_rport_attrs[count].store = NULL; \
804 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
807 #define SETUP_RPORT_ATTRIBUTE_RW(field) \
808 i->private_rport_attrs[count] = device_attr_rport_##field; \
809 if (!i->f->set_rport_##field) { \
810 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
811 i->private_rport_attrs[count].store = NULL; \
813 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
814 if (i->f->show_rport_##field) \
817 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
819 i->private_rport_attrs[count] = device_attr_rport_##field; \
820 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
825 /* The FC Transport Remote Port Attributes: */
827 /* Fixed Remote Port Attributes */
829 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
832 show_fc_rport_supported_classes (struct device *dev,
833 struct device_attribute *attr, char *buf)
835 struct fc_rport *rport = transport_class_to_rport(dev);
836 if (rport->supported_classes == FC_COS_UNSPECIFIED)
837 return snprintf(buf, 20, "unspecified\n");
838 return get_fc_cos_names(rport->supported_classes, buf);
840 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
841 show_fc_rport_supported_classes, NULL);
843 /* Dynamic Remote Port Attributes */
846 * dev_loss_tmo attribute
848 static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
852 *val = simple_strtoul(buf, &cp, 0);
853 if ((*cp && (*cp != '\n')) || (*val < 0))
856 * Check for overflow; dev_loss_tmo is u32
864 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
867 struct Scsi_Host *shost = rport_to_shost(rport);
868 struct fc_internal *i = to_fc_internal(shost->transportt);
870 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
871 (rport->port_state == FC_PORTSTATE_DELETED) ||
872 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
875 * Check for overflow; dev_loss_tmo is u32
881 * If fast_io_fail is off we have to cap
882 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
884 if (rport->fast_io_fail_tmo == -1 &&
885 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
888 i->f->set_rport_dev_loss_tmo(rport, val);
892 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
894 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
895 const char *buf, size_t count)
897 struct fc_rport *rport = transport_class_to_rport(dev);
901 rc = fc_str_to_dev_loss(buf, &val);
905 rc = fc_rport_set_dev_loss_tmo(rport, val);
910 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
911 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
914 /* Private Remote Port Attributes */
916 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
917 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
918 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
921 show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
924 struct fc_rport *rport = transport_class_to_rport(dev);
926 /* identify any roles that are port_id specific */
927 if ((rport->port_id != -1) &&
928 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
929 FC_WELLKNOWN_PORTID_MASK) {
930 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
931 case FC_FPORT_PORTID:
932 return snprintf(buf, 30, "Fabric Port\n");
933 case FC_FABCTLR_PORTID:
934 return snprintf(buf, 30, "Fabric Controller\n");
935 case FC_DIRSRVR_PORTID:
936 return snprintf(buf, 30, "Directory Server\n");
937 case FC_TIMESRVR_PORTID:
938 return snprintf(buf, 30, "Time Server\n");
939 case FC_MGMTSRVR_PORTID:
940 return snprintf(buf, 30, "Management Server\n");
942 return snprintf(buf, 30, "Unknown Fabric Entity\n");
945 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
946 return snprintf(buf, 20, "unknown\n");
947 return get_fc_port_roles_names(rport->roles, buf);
950 static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
951 show_fc_rport_roles, NULL);
953 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
954 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
957 * fast_io_fail_tmo attribute
960 show_fc_rport_fast_io_fail_tmo (struct device *dev,
961 struct device_attribute *attr, char *buf)
963 struct fc_rport *rport = transport_class_to_rport(dev);
965 if (rport->fast_io_fail_tmo == -1)
966 return snprintf(buf, 5, "off\n");
967 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
971 store_fc_rport_fast_io_fail_tmo(struct device *dev,
972 struct device_attribute *attr, const char *buf,
977 struct fc_rport *rport = transport_class_to_rport(dev);
979 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
980 (rport->port_state == FC_PORTSTATE_DELETED) ||
981 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
983 if (strncmp(buf, "off", 3) == 0)
984 rport->fast_io_fail_tmo = -1;
986 val = simple_strtoul(buf, &cp, 0);
987 if ((*cp && (*cp != '\n')) || (val < 0))
990 * Cap fast_io_fail by dev_loss_tmo or
991 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
993 if ((val >= rport->dev_loss_tmo) ||
994 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
997 rport->fast_io_fail_tmo = val;
1001 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
1002 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1006 * FC SCSI Target Attribute Management
1010 * Note: in the target show function we recognize when the remote
1011 * port is in the hierarchy and do not allow the driver to get
1012 * involved in sysfs functions. The driver only gets involved if
1013 * it's the "old" style that doesn't use rports.
1015 #define fc_starget_show_function(field, format_string, sz, cast) \
1017 show_fc_starget_##field (struct device *dev, \
1018 struct device_attribute *attr, char *buf) \
1020 struct scsi_target *starget = transport_class_to_starget(dev); \
1021 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
1022 struct fc_internal *i = to_fc_internal(shost->transportt); \
1023 struct fc_rport *rport = starget_to_rport(starget); \
1025 fc_starget_##field(starget) = rport->field; \
1026 else if (i->f->get_starget_##field) \
1027 i->f->get_starget_##field(starget); \
1028 return snprintf(buf, sz, format_string, \
1029 cast fc_starget_##field(starget)); \
1032 #define fc_starget_rd_attr(field, format_string, sz) \
1033 fc_starget_show_function(field, format_string, sz, ) \
1034 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1035 show_fc_starget_##field, NULL)
1037 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
1038 fc_starget_show_function(field, format_string, sz, (cast)) \
1039 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1040 show_fc_starget_##field, NULL)
1042 #define SETUP_STARGET_ATTRIBUTE_RD(field) \
1043 i->private_starget_attrs[count] = device_attr_starget_##field; \
1044 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1045 i->private_starget_attrs[count].store = NULL; \
1046 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1047 if (i->f->show_starget_##field) \
1050 #define SETUP_STARGET_ATTRIBUTE_RW(field) \
1051 i->private_starget_attrs[count] = device_attr_starget_##field; \
1052 if (!i->f->set_starget_##field) { \
1053 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1054 i->private_starget_attrs[count].store = NULL; \
1056 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1057 if (i->f->show_starget_##field) \
1060 /* The FC Transport SCSI Target Attributes: */
1061 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1062 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1063 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1067 * FC Virtual Port Attribute Management
1070 #define fc_vport_show_function(field, format_string, sz, cast) \
1072 show_fc_vport_##field (struct device *dev, \
1073 struct device_attribute *attr, char *buf) \
1075 struct fc_vport *vport = transport_class_to_vport(dev); \
1076 struct Scsi_Host *shost = vport_to_shost(vport); \
1077 struct fc_internal *i = to_fc_internal(shost->transportt); \
1078 if ((i->f->get_vport_##field) && \
1079 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1080 i->f->get_vport_##field(vport); \
1081 return snprintf(buf, sz, format_string, cast vport->field); \
1084 #define fc_vport_store_function(field) \
1086 store_fc_vport_##field(struct device *dev, \
1087 struct device_attribute *attr, \
1088 const char *buf, size_t count) \
1091 struct fc_vport *vport = transport_class_to_vport(dev); \
1092 struct Scsi_Host *shost = vport_to_shost(vport); \
1093 struct fc_internal *i = to_fc_internal(shost->transportt); \
1095 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1097 val = simple_strtoul(buf, &cp, 0); \
1098 if (*cp && (*cp != '\n')) \
1100 i->f->set_vport_##field(vport, val); \
1104 #define fc_vport_store_str_function(field, slen) \
1106 store_fc_vport_##field(struct device *dev, \
1107 struct device_attribute *attr, \
1108 const char *buf, size_t count) \
1110 struct fc_vport *vport = transport_class_to_vport(dev); \
1111 struct Scsi_Host *shost = vport_to_shost(vport); \
1112 struct fc_internal *i = to_fc_internal(shost->transportt); \
1113 unsigned int cnt=count; \
1115 /* count may include a LF at end of string */ \
1116 if (buf[cnt-1] == '\n') \
1118 if (cnt > ((slen) - 1)) \
1120 memcpy(vport->field, buf, cnt); \
1121 i->f->set_vport_##field(vport); \
1125 #define fc_vport_rd_attr(field, format_string, sz) \
1126 fc_vport_show_function(field, format_string, sz, ) \
1127 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1128 show_fc_vport_##field, NULL)
1130 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1131 fc_vport_show_function(field, format_string, sz, (cast)) \
1132 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1133 show_fc_vport_##field, NULL)
1135 #define fc_vport_rw_attr(field, format_string, sz) \
1136 fc_vport_show_function(field, format_string, sz, ) \
1137 fc_vport_store_function(field) \
1138 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1139 show_fc_vport_##field, \
1140 store_fc_vport_##field)
1142 #define fc_private_vport_show_function(field, format_string, sz, cast) \
1144 show_fc_vport_##field (struct device *dev, \
1145 struct device_attribute *attr, char *buf) \
1147 struct fc_vport *vport = transport_class_to_vport(dev); \
1148 return snprintf(buf, sz, format_string, cast vport->field); \
1151 #define fc_private_vport_store_u32_function(field) \
1153 store_fc_vport_##field(struct device *dev, \
1154 struct device_attribute *attr, \
1155 const char *buf, size_t count) \
1158 struct fc_vport *vport = transport_class_to_vport(dev); \
1160 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1162 val = simple_strtoul(buf, &cp, 0); \
1163 if (*cp && (*cp != '\n')) \
1165 vport->field = val; \
1170 #define fc_private_vport_rd_attr(field, format_string, sz) \
1171 fc_private_vport_show_function(field, format_string, sz, ) \
1172 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1173 show_fc_vport_##field, NULL)
1175 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1176 fc_private_vport_show_function(field, format_string, sz, (cast)) \
1177 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1178 show_fc_vport_##field, NULL)
1180 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1181 fc_private_vport_show_function(field, format_string, sz, ) \
1182 fc_private_vport_store_u32_function(field) \
1183 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1184 show_fc_vport_##field, \
1185 store_fc_vport_##field)
1188 #define fc_private_vport_rd_enum_attr(title, maxlen) \
1190 show_fc_vport_##title (struct device *dev, \
1191 struct device_attribute *attr, \
1194 struct fc_vport *vport = transport_class_to_vport(dev); \
1196 name = get_fc_##title##_name(vport->title); \
1199 return snprintf(buf, maxlen, "%s\n", name); \
1201 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
1202 show_fc_vport_##title, NULL)
1205 #define SETUP_VPORT_ATTRIBUTE_RD(field) \
1206 i->private_vport_attrs[count] = device_attr_vport_##field; \
1207 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1208 i->private_vport_attrs[count].store = NULL; \
1209 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1210 if (i->f->get_##field) \
1212 /* NOTE: Above MACRO differs: checks function not show bit */
1214 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
1215 i->private_vport_attrs[count] = device_attr_vport_##field; \
1216 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1217 i->private_vport_attrs[count].store = NULL; \
1218 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1221 #define SETUP_VPORT_ATTRIBUTE_WR(field) \
1222 i->private_vport_attrs[count] = device_attr_vport_##field; \
1223 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1226 /* NOTE: Above MACRO differs: checks function */
1228 #define SETUP_VPORT_ATTRIBUTE_RW(field) \
1229 i->private_vport_attrs[count] = device_attr_vport_##field; \
1230 if (!i->f->set_vport_##field) { \
1231 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1232 i->private_vport_attrs[count].store = NULL; \
1234 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1236 /* NOTE: Above MACRO differs: does not check show bit */
1238 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1240 i->private_vport_attrs[count] = device_attr_vport_##field; \
1241 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1246 /* The FC Transport Virtual Port Attributes: */
1248 /* Fixed Virtual Port Attributes */
1250 /* Dynamic Virtual Port Attributes */
1252 /* Private Virtual Port Attributes */
1254 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1255 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1256 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1257 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1260 show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1263 struct fc_vport *vport = transport_class_to_vport(dev);
1265 if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1266 return snprintf(buf, 20, "unknown\n");
1267 return get_fc_port_roles_names(vport->roles, buf);
1269 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1271 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1273 fc_private_vport_show_function(symbolic_name, "%s\n",
1274 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1275 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1276 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1277 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1280 store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1281 const char *buf, size_t count)
1283 struct fc_vport *vport = transport_class_to_vport(dev);
1284 struct Scsi_Host *shost = vport_to_shost(vport);
1285 unsigned long flags;
1287 spin_lock_irqsave(shost->host_lock, flags);
1288 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
1289 spin_unlock_irqrestore(shost->host_lock, flags);
1292 vport->flags |= FC_VPORT_DELETING;
1293 spin_unlock_irqrestore(shost->host_lock, flags);
1295 fc_queue_work(shost, &vport->vport_delete_work);
1298 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1299 NULL, store_fc_vport_delete);
1303 * Enable/Disable vport
1304 * Write "1" to disable, write "0" to enable
1307 store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1311 struct fc_vport *vport = transport_class_to_vport(dev);
1312 struct Scsi_Host *shost = vport_to_shost(vport);
1313 struct fc_internal *i = to_fc_internal(shost->transportt);
1316 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1320 if (vport->vport_state != FC_VPORT_DISABLED)
1322 } else if (*buf == '1') {
1323 if (vport->vport_state == FC_VPORT_DISABLED)
1328 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1329 return stat ? stat : count;
1331 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1332 NULL, store_fc_vport_disable);
1336 * Host Attribute Management
1339 #define fc_host_show_function(field, format_string, sz, cast) \
1341 show_fc_host_##field (struct device *dev, \
1342 struct device_attribute *attr, char *buf) \
1344 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1345 struct fc_internal *i = to_fc_internal(shost->transportt); \
1346 if (i->f->get_host_##field) \
1347 i->f->get_host_##field(shost); \
1348 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1351 #define fc_host_store_function(field) \
1353 store_fc_host_##field(struct device *dev, \
1354 struct device_attribute *attr, \
1355 const char *buf, size_t count) \
1358 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1359 struct fc_internal *i = to_fc_internal(shost->transportt); \
1362 val = simple_strtoul(buf, &cp, 0); \
1363 if (*cp && (*cp != '\n')) \
1365 i->f->set_host_##field(shost, val); \
1369 #define fc_host_store_str_function(field, slen) \
1371 store_fc_host_##field(struct device *dev, \
1372 struct device_attribute *attr, \
1373 const char *buf, size_t count) \
1375 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1376 struct fc_internal *i = to_fc_internal(shost->transportt); \
1377 unsigned int cnt=count; \
1379 /* count may include a LF at end of string */ \
1380 if (buf[cnt-1] == '\n') \
1382 if (cnt > ((slen) - 1)) \
1384 memcpy(fc_host_##field(shost), buf, cnt); \
1385 i->f->set_host_##field(shost); \
1389 #define fc_host_rd_attr(field, format_string, sz) \
1390 fc_host_show_function(field, format_string, sz, ) \
1391 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1392 show_fc_host_##field, NULL)
1394 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1395 fc_host_show_function(field, format_string, sz, (cast)) \
1396 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1397 show_fc_host_##field, NULL)
1399 #define fc_host_rw_attr(field, format_string, sz) \
1400 fc_host_show_function(field, format_string, sz, ) \
1401 fc_host_store_function(field) \
1402 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1403 show_fc_host_##field, \
1404 store_fc_host_##field)
1406 #define fc_host_rd_enum_attr(title, maxlen) \
1408 show_fc_host_##title (struct device *dev, \
1409 struct device_attribute *attr, char *buf) \
1411 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1412 struct fc_internal *i = to_fc_internal(shost->transportt); \
1414 if (i->f->get_host_##title) \
1415 i->f->get_host_##title(shost); \
1416 name = get_fc_##title##_name(fc_host_##title(shost)); \
1419 return snprintf(buf, maxlen, "%s\n", name); \
1421 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1423 #define SETUP_HOST_ATTRIBUTE_RD(field) \
1424 i->private_host_attrs[count] = device_attr_host_##field; \
1425 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1426 i->private_host_attrs[count].store = NULL; \
1427 i->host_attrs[count] = &i->private_host_attrs[count]; \
1428 if (i->f->show_host_##field) \
1431 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
1432 i->private_host_attrs[count] = device_attr_host_##field; \
1433 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1434 i->private_host_attrs[count].store = NULL; \
1435 i->host_attrs[count] = &i->private_host_attrs[count]; \
1438 #define SETUP_HOST_ATTRIBUTE_RW(field) \
1439 i->private_host_attrs[count] = device_attr_host_##field; \
1440 if (!i->f->set_host_##field) { \
1441 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1442 i->private_host_attrs[count].store = NULL; \
1444 i->host_attrs[count] = &i->private_host_attrs[count]; \
1445 if (i->f->show_host_##field) \
1449 #define fc_private_host_show_function(field, format_string, sz, cast) \
1451 show_fc_host_##field (struct device *dev, \
1452 struct device_attribute *attr, char *buf) \
1454 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1455 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1458 #define fc_private_host_rd_attr(field, format_string, sz) \
1459 fc_private_host_show_function(field, format_string, sz, ) \
1460 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1461 show_fc_host_##field, NULL)
1463 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1464 fc_private_host_show_function(field, format_string, sz, (cast)) \
1465 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1466 show_fc_host_##field, NULL)
1468 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
1469 i->private_host_attrs[count] = device_attr_host_##field; \
1470 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1471 i->private_host_attrs[count].store = NULL; \
1472 i->host_attrs[count] = &i->private_host_attrs[count]; \
1475 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
1477 i->private_host_attrs[count] = device_attr_host_##field; \
1478 i->host_attrs[count] = &i->private_host_attrs[count]; \
1483 /* Fixed Host Attributes */
1486 show_fc_host_supported_classes (struct device *dev,
1487 struct device_attribute *attr, char *buf)
1489 struct Scsi_Host *shost = transport_class_to_shost(dev);
1491 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1492 return snprintf(buf, 20, "unspecified\n");
1494 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1496 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1497 show_fc_host_supported_classes, NULL);
1500 show_fc_host_supported_fc4s (struct device *dev,
1501 struct device_attribute *attr, char *buf)
1503 struct Scsi_Host *shost = transport_class_to_shost(dev);
1504 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1506 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1507 show_fc_host_supported_fc4s, NULL);
1510 show_fc_host_supported_speeds (struct device *dev,
1511 struct device_attribute *attr, char *buf)
1513 struct Scsi_Host *shost = transport_class_to_shost(dev);
1515 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1516 return snprintf(buf, 20, "unknown\n");
1518 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1520 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1521 show_fc_host_supported_speeds, NULL);
1524 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1525 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1526 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1527 unsigned long long);
1528 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1529 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1530 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1531 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1532 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1533 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1534 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1535 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1536 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1537 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1540 /* Dynamic Host Attributes */
1543 show_fc_host_active_fc4s (struct device *dev,
1544 struct device_attribute *attr, char *buf)
1546 struct Scsi_Host *shost = transport_class_to_shost(dev);
1547 struct fc_internal *i = to_fc_internal(shost->transportt);
1549 if (i->f->get_host_active_fc4s)
1550 i->f->get_host_active_fc4s(shost);
1552 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1554 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1555 show_fc_host_active_fc4s, NULL);
1558 show_fc_host_speed (struct device *dev,
1559 struct device_attribute *attr, char *buf)
1561 struct Scsi_Host *shost = transport_class_to_shost(dev);
1562 struct fc_internal *i = to_fc_internal(shost->transportt);
1564 if (i->f->get_host_speed)
1565 i->f->get_host_speed(shost);
1567 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1568 return snprintf(buf, 20, "unknown\n");
1570 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1572 static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1573 show_fc_host_speed, NULL);
1576 fc_host_rd_attr(port_id, "0x%06x\n", 20);
1577 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1578 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1579 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
1580 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1582 fc_private_host_show_function(system_hostname, "%s\n",
1583 FC_SYMBOLIC_NAME_SIZE + 1, )
1584 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1585 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1586 show_fc_host_system_hostname, store_fc_host_system_hostname);
1589 /* Private Host Attributes */
1592 show_fc_private_host_tgtid_bind_type(struct device *dev,
1593 struct device_attribute *attr, char *buf)
1595 struct Scsi_Host *shost = transport_class_to_shost(dev);
1598 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1601 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1604 #define get_list_head_entry(pos, head, member) \
1605 pos = list_entry((head)->next, typeof(*pos), member)
1608 store_fc_private_host_tgtid_bind_type(struct device *dev,
1609 struct device_attribute *attr, const char *buf, size_t count)
1611 struct Scsi_Host *shost = transport_class_to_shost(dev);
1612 struct fc_rport *rport;
1613 enum fc_tgtid_binding_type val;
1614 unsigned long flags;
1616 if (get_fc_tgtid_bind_type_match(buf, &val))
1619 /* if changing bind type, purge all unused consistent bindings */
1620 if (val != fc_host_tgtid_bind_type(shost)) {
1621 spin_lock_irqsave(shost->host_lock, flags);
1622 while (!list_empty(&fc_host_rport_bindings(shost))) {
1623 get_list_head_entry(rport,
1624 &fc_host_rport_bindings(shost), peers);
1625 list_del(&rport->peers);
1626 rport->port_state = FC_PORTSTATE_DELETED;
1627 fc_queue_work(shost, &rport->rport_delete_work);
1629 spin_unlock_irqrestore(shost->host_lock, flags);
1632 fc_host_tgtid_bind_type(shost) = val;
1636 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1637 show_fc_private_host_tgtid_bind_type,
1638 store_fc_private_host_tgtid_bind_type);
1641 store_fc_private_host_issue_lip(struct device *dev,
1642 struct device_attribute *attr, const char *buf, size_t count)
1644 struct Scsi_Host *shost = transport_class_to_shost(dev);
1645 struct fc_internal *i = to_fc_internal(shost->transportt);
1648 /* ignore any data value written to the attribute */
1649 if (i->f->issue_fc_host_lip) {
1650 ret = i->f->issue_fc_host_lip(shost);
1651 return ret ? ret: count;
1657 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
1658 store_fc_private_host_issue_lip);
1661 store_fc_private_host_dev_loss_tmo(struct device *dev,
1662 struct device_attribute *attr,
1663 const char *buf, size_t count)
1665 struct Scsi_Host *shost = transport_class_to_shost(dev);
1666 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1667 struct fc_rport *rport;
1668 unsigned long val, flags;
1671 rc = fc_str_to_dev_loss(buf, &val);
1675 fc_host_dev_loss_tmo(shost) = val;
1676 spin_lock_irqsave(shost->host_lock, flags);
1677 list_for_each_entry(rport, &fc_host->rports, peers)
1678 fc_rport_set_dev_loss_tmo(rport, val);
1679 spin_unlock_irqrestore(shost->host_lock, flags);
1683 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
1684 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
1685 show_fc_host_dev_loss_tmo,
1686 store_fc_private_host_dev_loss_tmo);
1688 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
1691 * Host Statistics Management
1694 /* Show a given an attribute in the statistics group */
1696 fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1698 struct Scsi_Host *shost = transport_class_to_shost(dev);
1699 struct fc_internal *i = to_fc_internal(shost->transportt);
1700 struct fc_host_statistics *stats;
1701 ssize_t ret = -ENOENT;
1703 if (offset > sizeof(struct fc_host_statistics) ||
1704 offset % sizeof(u64) != 0)
1707 if (i->f->get_fc_host_stats) {
1708 stats = (i->f->get_fc_host_stats)(shost);
1710 ret = snprintf(buf, 20, "0x%llx\n",
1711 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1717 /* generate a read-only statistics attribute */
1718 #define fc_host_statistic(name) \
1719 static ssize_t show_fcstat_##name(struct device *cd, \
1720 struct device_attribute *attr, \
1723 return fc_stat_show(cd, buf, \
1724 offsetof(struct fc_host_statistics, name)); \
1726 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1728 fc_host_statistic(seconds_since_last_reset);
1729 fc_host_statistic(tx_frames);
1730 fc_host_statistic(tx_words);
1731 fc_host_statistic(rx_frames);
1732 fc_host_statistic(rx_words);
1733 fc_host_statistic(lip_count);
1734 fc_host_statistic(nos_count);
1735 fc_host_statistic(error_frames);
1736 fc_host_statistic(dumped_frames);
1737 fc_host_statistic(link_failure_count);
1738 fc_host_statistic(loss_of_sync_count);
1739 fc_host_statistic(loss_of_signal_count);
1740 fc_host_statistic(prim_seq_protocol_err_count);
1741 fc_host_statistic(invalid_tx_word_count);
1742 fc_host_statistic(invalid_crc_count);
1743 fc_host_statistic(fcp_input_requests);
1744 fc_host_statistic(fcp_output_requests);
1745 fc_host_statistic(fcp_control_requests);
1746 fc_host_statistic(fcp_input_megabytes);
1747 fc_host_statistic(fcp_output_megabytes);
1748 fc_host_statistic(fcp_packet_alloc_failures);
1749 fc_host_statistic(fcp_packet_aborts);
1750 fc_host_statistic(fcp_frame_alloc_failures);
1751 fc_host_statistic(fc_no_free_exch);
1752 fc_host_statistic(fc_no_free_exch_xid);
1753 fc_host_statistic(fc_xid_not_found);
1754 fc_host_statistic(fc_xid_busy);
1755 fc_host_statistic(fc_seq_not_found);
1756 fc_host_statistic(fc_non_bls_resp);
1759 fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1760 const char *buf, size_t count)
1762 struct Scsi_Host *shost = transport_class_to_shost(dev);
1763 struct fc_internal *i = to_fc_internal(shost->transportt);
1765 /* ignore any data value written to the attribute */
1766 if (i->f->reset_fc_host_stats) {
1767 i->f->reset_fc_host_stats(shost);
1773 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1774 fc_reset_statistics);
1776 static struct attribute *fc_statistics_attrs[] = {
1777 &device_attr_host_seconds_since_last_reset.attr,
1778 &device_attr_host_tx_frames.attr,
1779 &device_attr_host_tx_words.attr,
1780 &device_attr_host_rx_frames.attr,
1781 &device_attr_host_rx_words.attr,
1782 &device_attr_host_lip_count.attr,
1783 &device_attr_host_nos_count.attr,
1784 &device_attr_host_error_frames.attr,
1785 &device_attr_host_dumped_frames.attr,
1786 &device_attr_host_link_failure_count.attr,
1787 &device_attr_host_loss_of_sync_count.attr,
1788 &device_attr_host_loss_of_signal_count.attr,
1789 &device_attr_host_prim_seq_protocol_err_count.attr,
1790 &device_attr_host_invalid_tx_word_count.attr,
1791 &device_attr_host_invalid_crc_count.attr,
1792 &device_attr_host_fcp_input_requests.attr,
1793 &device_attr_host_fcp_output_requests.attr,
1794 &device_attr_host_fcp_control_requests.attr,
1795 &device_attr_host_fcp_input_megabytes.attr,
1796 &device_attr_host_fcp_output_megabytes.attr,
1797 &device_attr_host_fcp_packet_alloc_failures.attr,
1798 &device_attr_host_fcp_packet_aborts.attr,
1799 &device_attr_host_fcp_frame_alloc_failures.attr,
1800 &device_attr_host_fc_no_free_exch.attr,
1801 &device_attr_host_fc_no_free_exch_xid.attr,
1802 &device_attr_host_fc_xid_not_found.attr,
1803 &device_attr_host_fc_xid_busy.attr,
1804 &device_attr_host_fc_seq_not_found.attr,
1805 &device_attr_host_fc_non_bls_resp.attr,
1806 &device_attr_host_reset_statistics.attr,
1810 static struct attribute_group fc_statistics_group = {
1811 .name = "statistics",
1812 .attrs = fc_statistics_attrs,
1816 /* Host Vport Attributes */
1819 fc_parse_wwn(const char *ns, u64 *nm)
1824 memset(wwn, 0, sizeof(wwn));
1826 /* Validate and store the new name */
1827 for (i=0, j=0; i < 16; i++) {
1830 value = hex_to_bin(*ns++);
1832 j = (j << 4) | value;
1836 wwn[i/2] = j & 0xff;
1841 *nm = wwn_to_u64(wwn);
1848 * "Short-cut" sysfs variable to create a new vport on a FC Host.
1849 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1850 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1851 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1854 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1855 const char *buf, size_t count)
1857 struct Scsi_Host *shost = transport_class_to_shost(dev);
1858 struct fc_vport_identifiers vid;
1859 struct fc_vport *vport;
1860 unsigned int cnt=count;
1863 memset(&vid, 0, sizeof(vid));
1865 /* count may include a LF at end of string */
1866 if (buf[cnt-1] == '\n')
1869 /* validate we have enough characters for WWPN */
1870 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1873 stat = fc_parse_wwn(&buf[0], &vid.port_name);
1877 stat = fc_parse_wwn(&buf[17], &vid.node_name);
1881 vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1882 vid.vport_type = FC_PORTTYPE_NPIV;
1883 /* vid.symbolic_name is already zero/NULL's */
1884 vid.disable = false; /* always enabled */
1886 /* we only allow support on Channel 0 !!! */
1887 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
1888 return stat ? stat : count;
1890 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
1891 store_fc_host_vport_create);
1895 * "Short-cut" sysfs variable to delete a vport on a FC Host.
1896 * Vport is identified by a string containing "<WWPN>:<WWNN>".
1897 * The WWNs are specified as hex characters, and may *not* contain
1898 * any prefixes (e.g. 0x, x, etc)
1901 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1902 const char *buf, size_t count)
1904 struct Scsi_Host *shost = transport_class_to_shost(dev);
1905 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1906 struct fc_vport *vport;
1908 unsigned long flags;
1909 unsigned int cnt=count;
1912 /* count may include a LF at end of string */
1913 if (buf[cnt-1] == '\n')
1916 /* validate we have enough characters for WWPN */
1917 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1920 stat = fc_parse_wwn(&buf[0], &wwpn);
1924 stat = fc_parse_wwn(&buf[17], &wwnn);
1928 spin_lock_irqsave(shost->host_lock, flags);
1930 /* we only allow support on Channel 0 !!! */
1931 list_for_each_entry(vport, &fc_host->vports, peers) {
1932 if ((vport->channel == 0) &&
1933 (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
1934 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1936 vport->flags |= FC_VPORT_DELETING;
1941 spin_unlock_irqrestore(shost->host_lock, flags);
1946 stat = fc_vport_terminate(vport);
1947 return stat ? stat : count;
1949 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
1950 store_fc_host_vport_delete);
1953 static int fc_host_match(struct attribute_container *cont,
1956 struct Scsi_Host *shost;
1957 struct fc_internal *i;
1959 if (!scsi_is_host_device(dev))
1962 shost = dev_to_shost(dev);
1963 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1964 != &fc_host_class.class)
1967 i = to_fc_internal(shost->transportt);
1969 return &i->t.host_attrs.ac == cont;
1972 static int fc_target_match(struct attribute_container *cont,
1975 struct Scsi_Host *shost;
1976 struct fc_internal *i;
1978 if (!scsi_is_target_device(dev))
1981 shost = dev_to_shost(dev->parent);
1982 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1983 != &fc_host_class.class)
1986 i = to_fc_internal(shost->transportt);
1988 return &i->t.target_attrs.ac == cont;
1991 static void fc_rport_dev_release(struct device *dev)
1993 struct fc_rport *rport = dev_to_rport(dev);
1994 put_device(dev->parent);
1998 int scsi_is_fc_rport(const struct device *dev)
2000 return dev->release == fc_rport_dev_release;
2002 EXPORT_SYMBOL(scsi_is_fc_rport);
2004 static int fc_rport_match(struct attribute_container *cont,
2007 struct Scsi_Host *shost;
2008 struct fc_internal *i;
2010 if (!scsi_is_fc_rport(dev))
2013 shost = dev_to_shost(dev->parent);
2014 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2015 != &fc_host_class.class)
2018 i = to_fc_internal(shost->transportt);
2020 return &i->rport_attr_cont.ac == cont;
2024 static void fc_vport_dev_release(struct device *dev)
2026 struct fc_vport *vport = dev_to_vport(dev);
2027 put_device(dev->parent); /* release kobj parent */
2031 static int scsi_is_fc_vport(const struct device *dev)
2033 return dev->release == fc_vport_dev_release;
2036 static int fc_vport_match(struct attribute_container *cont,
2039 struct fc_vport *vport;
2040 struct Scsi_Host *shost;
2041 struct fc_internal *i;
2043 if (!scsi_is_fc_vport(dev))
2045 vport = dev_to_vport(dev);
2047 shost = vport_to_shost(vport);
2048 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2049 != &fc_host_class.class)
2052 i = to_fc_internal(shost->transportt);
2053 return &i->vport_attr_cont.ac == cont;
2058 * fc_eh_timed_out - FC Transport I/O timeout intercept handler
2059 * @scmd: The SCSI command which timed out
2061 * This routine protects against error handlers getting invoked while a
2062 * rport is in a blocked state, typically due to a temporarily loss of
2063 * connectivity. If the error handlers are allowed to proceed, requests
2064 * to abort i/o, reset the target, etc will likely fail as there is no way
2065 * to communicate with the device to perform the requested function. These
2066 * failures may result in the midlayer taking the device offline, requiring
2067 * manual intervention to restore operation.
2069 * This routine, called whenever an i/o times out, validates the state of
2070 * the underlying rport. If the rport is blocked, it returns
2071 * EH_RESET_TIMER, which will continue to reschedule the timeout.
2072 * Eventually, either the device will return, or devloss_tmo will fire,
2073 * and when the timeout then fires, it will be handled normally.
2074 * If the rport is not blocked, normal error handling continues.
2077 * This routine assumes no locks are held on entry.
2079 enum blk_eh_timer_return
2080 fc_eh_timed_out(struct scsi_cmnd *scmd)
2082 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2084 if (rport->port_state == FC_PORTSTATE_BLOCKED)
2085 return BLK_EH_RESET_TIMER;
2087 return BLK_EH_NOT_HANDLED;
2089 EXPORT_SYMBOL(fc_eh_timed_out);
2092 * Called by fc_user_scan to locate an rport on the shost that
2093 * matches the channel and target id, and invoke scsi_scan_target()
2097 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2099 struct fc_rport *rport;
2100 unsigned long flags;
2102 spin_lock_irqsave(shost->host_lock, flags);
2104 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2105 if (rport->scsi_target_id == -1)
2108 if (rport->port_state != FC_PORTSTATE_ONLINE)
2111 if ((channel == rport->channel) &&
2112 (id == rport->scsi_target_id)) {
2113 spin_unlock_irqrestore(shost->host_lock, flags);
2114 scsi_scan_target(&rport->dev, channel, id, lun,
2120 spin_unlock_irqrestore(shost->host_lock, flags);
2124 * Called via sysfs scan routines. Necessary, as the FC transport
2125 * wants to place all target objects below the rport object. So this
2126 * routine must invoke the scsi_scan_target() routine with the rport
2127 * object as the parent.
2130 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2135 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2136 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2137 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2140 if (channel == SCAN_WILD_CARD) {
2142 chhi = shost->max_channel + 1;
2148 if (id == SCAN_WILD_CARD) {
2150 tgthi = shost->max_id;
2156 for ( ; chlo < chhi; chlo++)
2157 for ( ; tgtlo < tgthi; tgtlo++)
2158 fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2163 struct scsi_transport_template *
2164 fc_attach_transport(struct fc_function_template *ft)
2167 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2173 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2174 i->t.target_attrs.ac.class = &fc_transport_class.class;
2175 i->t.target_attrs.ac.match = fc_target_match;
2176 i->t.target_size = sizeof(struct fc_starget_attrs);
2177 transport_container_register(&i->t.target_attrs);
2179 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2180 i->t.host_attrs.ac.class = &fc_host_class.class;
2181 i->t.host_attrs.ac.match = fc_host_match;
2182 i->t.host_size = sizeof(struct fc_host_attrs);
2183 if (ft->get_fc_host_stats)
2184 i->t.host_attrs.statistics = &fc_statistics_group;
2185 transport_container_register(&i->t.host_attrs);
2187 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2188 i->rport_attr_cont.ac.class = &fc_rport_class.class;
2189 i->rport_attr_cont.ac.match = fc_rport_match;
2190 transport_container_register(&i->rport_attr_cont);
2192 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2193 i->vport_attr_cont.ac.class = &fc_vport_class.class;
2194 i->vport_attr_cont.ac.match = fc_vport_match;
2195 transport_container_register(&i->vport_attr_cont);
2199 /* Transport uses the shost workq for scsi scanning */
2200 i->t.create_work_queue = 1;
2202 i->t.user_scan = fc_user_scan;
2205 * Setup SCSI Target Attributes.
2208 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2209 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2210 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2212 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2214 i->starget_attrs[count] = NULL;
2218 * Setup SCSI Host Attributes.
2221 SETUP_HOST_ATTRIBUTE_RD(node_name);
2222 SETUP_HOST_ATTRIBUTE_RD(port_name);
2223 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
2224 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2225 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
2226 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2227 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
2228 if (ft->vport_create) {
2229 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2230 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2232 SETUP_HOST_ATTRIBUTE_RD(serial_number);
2233 SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2234 SETUP_HOST_ATTRIBUTE_RD(model);
2235 SETUP_HOST_ATTRIBUTE_RD(model_description);
2236 SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2237 SETUP_HOST_ATTRIBUTE_RD(driver_version);
2238 SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2239 SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
2241 SETUP_HOST_ATTRIBUTE_RD(port_id);
2242 SETUP_HOST_ATTRIBUTE_RD(port_type);
2243 SETUP_HOST_ATTRIBUTE_RD(port_state);
2244 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2245 SETUP_HOST_ATTRIBUTE_RD(speed);
2246 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
2247 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
2248 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
2250 /* Transport-managed attributes */
2251 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
2252 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
2253 if (ft->issue_fc_host_lip)
2254 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
2255 if (ft->vport_create)
2256 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2257 if (ft->vport_delete)
2258 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
2260 BUG_ON(count > FC_HOST_NUM_ATTRS);
2262 i->host_attrs[count] = NULL;
2265 * Setup Remote Port Attributes.
2268 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2269 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2270 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2271 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2272 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2273 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2274 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2275 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2276 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
2277 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
2279 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2281 i->rport_attrs[count] = NULL;
2284 * Setup Virtual Port Attributes.
2287 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2288 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2289 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2290 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2291 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2292 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2293 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2294 SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2295 SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2297 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2299 i->vport_attrs[count] = NULL;
2303 EXPORT_SYMBOL(fc_attach_transport);
2305 void fc_release_transport(struct scsi_transport_template *t)
2307 struct fc_internal *i = to_fc_internal(t);
2309 transport_container_unregister(&i->t.target_attrs);
2310 transport_container_unregister(&i->t.host_attrs);
2311 transport_container_unregister(&i->rport_attr_cont);
2312 transport_container_unregister(&i->vport_attr_cont);
2316 EXPORT_SYMBOL(fc_release_transport);
2319 * fc_queue_work - Queue work to the fc_host workqueue.
2320 * @shost: Pointer to Scsi_Host bound to fc_host.
2321 * @work: Work to queue for execution.
2324 * 1 - work queued for execution
2325 * 0 - work is already queued
2326 * -EINVAL - work queue doesn't exist
2329 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2331 if (unlikely(!fc_host_work_q(shost))) {
2333 "ERROR: FC host '%s' attempted to queue work, "
2334 "when no workqueue created.\n", shost->hostt->name);
2340 return queue_work(fc_host_work_q(shost), work);
2344 * fc_flush_work - Flush a fc_host's workqueue.
2345 * @shost: Pointer to Scsi_Host bound to fc_host.
2348 fc_flush_work(struct Scsi_Host *shost)
2350 if (!fc_host_work_q(shost)) {
2352 "ERROR: FC host '%s' attempted to flush work, "
2353 "when no workqueue created.\n", shost->hostt->name);
2358 flush_workqueue(fc_host_work_q(shost));
2362 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2363 * @shost: Pointer to Scsi_Host bound to fc_host.
2364 * @work: Work to queue for execution.
2365 * @delay: jiffies to delay the work queuing
2368 * 1 on success / 0 already queued / < 0 for error
2371 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2372 unsigned long delay)
2374 if (unlikely(!fc_host_devloss_work_q(shost))) {
2376 "ERROR: FC host '%s' attempted to queue work, "
2377 "when no workqueue created.\n", shost->hostt->name);
2383 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2387 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2388 * @shost: Pointer to Scsi_Host bound to fc_host.
2391 fc_flush_devloss(struct Scsi_Host *shost)
2393 if (!fc_host_devloss_work_q(shost)) {
2395 "ERROR: FC host '%s' attempted to flush work, "
2396 "when no workqueue created.\n", shost->hostt->name);
2401 flush_workqueue(fc_host_devloss_work_q(shost));
2406 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2407 * @shost: Which &Scsi_Host
2409 * This routine is expected to be called immediately preceding the
2410 * a driver's call to scsi_remove_host().
2412 * WARNING: A driver utilizing the fc_transport, which fails to call
2413 * this routine prior to scsi_remove_host(), will leave dangling
2414 * objects in /sys/class/fc_remote_ports. Access to any of these
2415 * objects can result in a system crash !!!
2418 * This routine assumes no locks are held on entry.
2421 fc_remove_host(struct Scsi_Host *shost)
2423 struct fc_vport *vport = NULL, *next_vport = NULL;
2424 struct fc_rport *rport = NULL, *next_rport = NULL;
2425 struct workqueue_struct *work_q;
2426 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2427 unsigned long flags;
2429 spin_lock_irqsave(shost->host_lock, flags);
2431 /* Remove any vports */
2432 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2433 fc_queue_work(shost, &vport->vport_delete_work);
2435 /* Remove any remote ports */
2436 list_for_each_entry_safe(rport, next_rport,
2437 &fc_host->rports, peers) {
2438 list_del(&rport->peers);
2439 rport->port_state = FC_PORTSTATE_DELETED;
2440 fc_queue_work(shost, &rport->rport_delete_work);
2443 list_for_each_entry_safe(rport, next_rport,
2444 &fc_host->rport_bindings, peers) {
2445 list_del(&rport->peers);
2446 rport->port_state = FC_PORTSTATE_DELETED;
2447 fc_queue_work(shost, &rport->rport_delete_work);
2450 spin_unlock_irqrestore(shost->host_lock, flags);
2452 /* flush all scan work items */
2453 scsi_flush_work(shost);
2455 /* flush all stgt delete, and rport delete work items, then kill it */
2456 if (fc_host->work_q) {
2457 work_q = fc_host->work_q;
2458 fc_host->work_q = NULL;
2459 destroy_workqueue(work_q);
2462 /* flush all devloss work items, then kill it */
2463 if (fc_host->devloss_work_q) {
2464 work_q = fc_host->devloss_work_q;
2465 fc_host->devloss_work_q = NULL;
2466 destroy_workqueue(work_q);
2469 EXPORT_SYMBOL(fc_remove_host);
2471 static void fc_terminate_rport_io(struct fc_rport *rport)
2473 struct Scsi_Host *shost = rport_to_shost(rport);
2474 struct fc_internal *i = to_fc_internal(shost->transportt);
2476 /* Involve the LLDD if possible to terminate all io on the rport. */
2477 if (i->f->terminate_rport_io)
2478 i->f->terminate_rport_io(rport);
2481 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
2483 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
2487 * fc_starget_delete - called to delete the scsi descendants of an rport
2488 * @work: remote port to be operated on.
2490 * Deletes target and all sdevs.
2493 fc_starget_delete(struct work_struct *work)
2495 struct fc_rport *rport =
2496 container_of(work, struct fc_rport, stgt_delete_work);
2498 fc_terminate_rport_io(rport);
2499 scsi_remove_target(&rport->dev);
2504 * fc_rport_final_delete - finish rport termination and delete it.
2505 * @work: remote port to be deleted.
2508 fc_rport_final_delete(struct work_struct *work)
2510 struct fc_rport *rport =
2511 container_of(work, struct fc_rport, rport_delete_work);
2512 struct device *dev = &rport->dev;
2513 struct Scsi_Host *shost = rport_to_shost(rport);
2514 struct fc_internal *i = to_fc_internal(shost->transportt);
2515 unsigned long flags;
2516 int do_callback = 0;
2518 fc_terminate_rport_io(rport);
2521 * if a scan is pending, flush the SCSI Host work_q so that
2522 * that we can reclaim the rport scan work element.
2524 if (rport->flags & FC_RPORT_SCAN_PENDING)
2525 scsi_flush_work(shost);
2528 * Cancel any outstanding timers. These should really exist
2529 * only when rmmod'ing the LLDD and we're asking for
2530 * immediate termination of the rports
2532 spin_lock_irqsave(shost->host_lock, flags);
2533 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2534 spin_unlock_irqrestore(shost->host_lock, flags);
2535 if (!cancel_delayed_work(&rport->fail_io_work))
2536 fc_flush_devloss(shost);
2537 if (!cancel_delayed_work(&rport->dev_loss_work))
2538 fc_flush_devloss(shost);
2539 cancel_work_sync(&rport->scan_work);
2540 spin_lock_irqsave(shost->host_lock, flags);
2541 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2543 spin_unlock_irqrestore(shost->host_lock, flags);
2545 /* Delete SCSI target and sdevs */
2546 if (rport->scsi_target_id != -1)
2547 fc_starget_delete(&rport->stgt_delete_work);
2550 * Notify the driver that the rport is now dead. The LLDD will
2551 * also guarantee that any communication to the rport is terminated
2553 * Avoid this call if we already called it when we preserved the
2554 * rport for the binding.
2556 spin_lock_irqsave(shost->host_lock, flags);
2557 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
2558 (i->f->dev_loss_tmo_callbk)) {
2559 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2562 spin_unlock_irqrestore(shost->host_lock, flags);
2565 i->f->dev_loss_tmo_callbk(rport);
2567 fc_bsg_remove(rport->rqst_q);
2569 transport_remove_device(dev);
2571 transport_destroy_device(dev);
2572 scsi_host_put(shost); /* for fc_host->rport list */
2573 put_device(dev); /* for self-reference */
2578 * fc_remote_port_create - allocates and creates a remote FC port.
2579 * @shost: scsi host the remote port is connected to.
2580 * @channel: Channel on shost port connected to.
2581 * @ids: The world wide names, fc address, and FC4 port
2582 * roles for the remote port.
2584 * Allocates and creates the remoter port structure, including the
2585 * class and sysfs creation.
2588 * This routine assumes no locks are held on entry.
2590 static struct fc_rport *
2591 fc_remote_port_create(struct Scsi_Host *shost, int channel,
2592 struct fc_rport_identifiers *ids)
2594 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2595 struct fc_internal *fci = to_fc_internal(shost->transportt);
2596 struct fc_rport *rport;
2598 unsigned long flags;
2602 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
2603 rport = kzalloc(size, GFP_KERNEL);
2604 if (unlikely(!rport)) {
2605 printk(KERN_ERR "%s: allocation failure\n", __func__);
2609 rport->maxframe_size = -1;
2610 rport->supported_classes = FC_COS_UNSPECIFIED;
2611 rport->dev_loss_tmo = fc_host->dev_loss_tmo;
2612 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2613 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2614 rport->port_id = ids->port_id;
2615 rport->roles = ids->roles;
2616 rport->port_state = FC_PORTSTATE_ONLINE;
2617 if (fci->f->dd_fcrport_size)
2618 rport->dd_data = &rport[1];
2619 rport->channel = channel;
2620 rport->fast_io_fail_tmo = -1;
2622 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2623 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2624 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2625 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2626 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
2628 spin_lock_irqsave(shost->host_lock, flags);
2630 rport->number = fc_host->next_rport_number++;
2631 if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
2632 rport->scsi_target_id = fc_host->next_target_id++;
2634 rport->scsi_target_id = -1;
2635 list_add_tail(&rport->peers, &fc_host->rports);
2636 scsi_host_get(shost); /* for fc_host->rport list */
2638 spin_unlock_irqrestore(shost->host_lock, flags);
2641 device_initialize(dev); /* takes self reference */
2642 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
2643 dev->release = fc_rport_dev_release;
2644 dev_set_name(dev, "rport-%d:%d-%d",
2645 shost->host_no, channel, rport->number);
2646 transport_setup_device(dev);
2648 error = device_add(dev);
2650 printk(KERN_ERR "FC Remote Port device_add failed\n");
2653 transport_add_device(dev);
2654 transport_configure_device(dev);
2656 fc_bsg_rportadd(shost, rport);
2657 /* ignore any bsg add error - we just can't do sgio */
2659 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
2660 /* initiate a scan of the target */
2661 rport->flags |= FC_RPORT_SCAN_PENDING;
2662 scsi_queue_work(shost, &rport->scan_work);
2668 transport_destroy_device(dev);
2669 spin_lock_irqsave(shost->host_lock, flags);
2670 list_del(&rport->peers);
2671 scsi_host_put(shost); /* for fc_host->rport list */
2672 spin_unlock_irqrestore(shost->host_lock, flags);
2673 put_device(dev->parent);
2679 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
2680 * @shost: scsi host the remote port is connected to.
2681 * @channel: Channel on shost port connected to.
2682 * @ids: The world wide names, fc address, and FC4 port
2683 * roles for the remote port.
2685 * The LLDD calls this routine to notify the transport of the existence
2686 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2687 * of the port, it's FC address (port_id), and the FC4 roles that are
2688 * active for the port.
2690 * For ports that are FCP targets (aka scsi targets), the FC transport
2691 * maintains consistent target id bindings on behalf of the LLDD.
2692 * A consistent target id binding is an assignment of a target id to
2693 * a remote port identifier, which persists while the scsi host is
2694 * attached. The remote port can disappear, then later reappear, and
2695 * it's target id assignment remains the same. This allows for shifts
2696 * in FC addressing (if binding by wwpn or wwnn) with no apparent
2697 * changes to the scsi subsystem which is based on scsi host number and
2698 * target id values. Bindings are only valid during the attachment of
2699 * the scsi host. If the host detaches, then later re-attaches, target
2700 * id bindings may change.
2702 * This routine is responsible for returning a remote port structure.
2703 * The routine will search the list of remote ports it maintains
2704 * internally on behalf of consistent target id mappings. If found, the
2705 * remote port structure will be reused. Otherwise, a new remote port
2706 * structure will be allocated.
2708 * Whenever a remote port is allocated, a new fc_remote_port class
2709 * device is created.
2711 * Should not be called from interrupt context.
2714 * This routine assumes no locks are held on entry.
2717 fc_remote_port_add(struct Scsi_Host *shost, int channel,
2718 struct fc_rport_identifiers *ids)
2720 struct fc_internal *fci = to_fc_internal(shost->transportt);
2721 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2722 struct fc_rport *rport;
2723 unsigned long flags;
2726 /* ensure any stgt delete functions are done */
2727 fc_flush_work(shost);
2730 * Search the list of "active" rports, for an rport that has been
2731 * deleted, but we've held off the real delete while the target
2732 * is in a "blocked" state.
2734 spin_lock_irqsave(shost->host_lock, flags);
2736 list_for_each_entry(rport, &fc_host->rports, peers) {
2738 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2739 (rport->channel == channel)) {
2741 switch (fc_host->tgtid_bind_type) {
2742 case FC_TGTID_BIND_BY_WWPN:
2743 case FC_TGTID_BIND_NONE:
2744 if (rport->port_name == ids->port_name)
2747 case FC_TGTID_BIND_BY_WWNN:
2748 if (rport->node_name == ids->node_name)
2751 case FC_TGTID_BIND_BY_ID:
2752 if (rport->port_id == ids->port_id)
2759 memcpy(&rport->node_name, &ids->node_name,
2760 sizeof(rport->node_name));
2761 memcpy(&rport->port_name, &ids->port_name,
2762 sizeof(rport->port_name));
2763 rport->port_id = ids->port_id;
2765 rport->port_state = FC_PORTSTATE_ONLINE;
2766 rport->roles = ids->roles;
2768 spin_unlock_irqrestore(shost->host_lock, flags);
2770 if (fci->f->dd_fcrport_size)
2771 memset(rport->dd_data, 0,
2772 fci->f->dd_fcrport_size);
2775 * If we were not a target, cancel the
2776 * io terminate and rport timers, and
2779 * If we were a target, but our new role
2780 * doesn't indicate a target, leave the
2781 * timers running expecting the role to
2782 * change as the target fully logs in. If
2783 * it doesn't, the target will be torn down.
2785 * If we were a target, and our role shows
2786 * we're still a target, cancel the timers
2787 * and kick off a scan.
2790 /* was a target, not in roles */
2791 if ((rport->scsi_target_id != -1) &&
2792 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
2796 * Stop the fail io and dev_loss timers.
2797 * If they flush, the port_state will
2798 * be checked and will NOOP the function.
2800 if (!cancel_delayed_work(&rport->fail_io_work))
2801 fc_flush_devloss(shost);
2802 if (!cancel_delayed_work(&rport->dev_loss_work))
2803 fc_flush_devloss(shost);
2805 spin_lock_irqsave(shost->host_lock, flags);
2807 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2808 FC_RPORT_DEVLOSS_PENDING |
2809 FC_RPORT_DEVLOSS_CALLBK_DONE);
2811 spin_unlock_irqrestore(shost->host_lock, flags);
2813 /* if target, initiate a scan */
2814 if (rport->scsi_target_id != -1) {
2815 scsi_target_unblock(&rport->dev,
2817 spin_lock_irqsave(shost->host_lock,
2819 rport->flags |= FC_RPORT_SCAN_PENDING;
2820 scsi_queue_work(shost,
2822 spin_unlock_irqrestore(shost->host_lock,
2826 fc_bsg_goose_queue(rport);
2834 * Search the bindings array
2835 * Note: if never a FCP target, you won't be on this list
2837 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
2839 /* search for a matching consistent binding */
2841 list_for_each_entry(rport, &fc_host->rport_bindings,
2843 if (rport->channel != channel)
2846 switch (fc_host->tgtid_bind_type) {
2847 case FC_TGTID_BIND_BY_WWPN:
2848 if (rport->port_name == ids->port_name)
2851 case FC_TGTID_BIND_BY_WWNN:
2852 if (rport->node_name == ids->node_name)
2855 case FC_TGTID_BIND_BY_ID:
2856 if (rport->port_id == ids->port_id)
2859 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2864 list_move_tail(&rport->peers, &fc_host->rports);
2870 memcpy(&rport->node_name, &ids->node_name,
2871 sizeof(rport->node_name));
2872 memcpy(&rport->port_name, &ids->port_name,
2873 sizeof(rport->port_name));
2874 rport->port_id = ids->port_id;
2875 rport->roles = ids->roles;
2876 rport->port_state = FC_PORTSTATE_ONLINE;
2877 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
2879 if (fci->f->dd_fcrport_size)
2880 memset(rport->dd_data, 0,
2881 fci->f->dd_fcrport_size);
2882 spin_unlock_irqrestore(shost->host_lock, flags);
2884 if (ids->roles & FC_PORT_ROLE_FCP_TARGET) {
2885 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
2887 /* initiate a scan of the target */
2888 spin_lock_irqsave(shost->host_lock, flags);
2889 rport->flags |= FC_RPORT_SCAN_PENDING;
2890 scsi_queue_work(shost, &rport->scan_work);
2891 spin_unlock_irqrestore(shost->host_lock, flags);
2897 spin_unlock_irqrestore(shost->host_lock, flags);
2899 /* No consistent binding found - create new remote port entry */
2900 rport = fc_remote_port_create(shost, channel, ids);
2904 EXPORT_SYMBOL(fc_remote_port_add);
2908 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
2909 * @rport: The remote port that no longer exists
2911 * The LLDD calls this routine to notify the transport that a remote
2912 * port is no longer part of the topology. Note: Although a port
2913 * may no longer be part of the topology, it may persist in the remote
2914 * ports displayed by the fc_host. We do this under 2 conditions:
2915 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
2916 * This allows the port to temporarily disappear, then reappear without
2917 * disrupting the SCSI device tree attached to it. During the "blocked"
2918 * period the port will still exist.
2919 * 2) If the port was a scsi target and disappears for longer than we
2920 * expect, we'll delete the port and the tear down the SCSI device tree
2921 * attached to it. However, we want to semi-persist the target id assigned
2922 * to that port if it eventually does exist. The port structure will
2923 * remain (although with minimal information) so that the target id
2926 * If the remote port is not an FCP Target, it will be fully torn down
2927 * and deallocated, including the fc_remote_port class device.
2929 * If the remote port is an FCP Target, the port will be placed in a
2930 * temporary blocked state. From the LLDD's perspective, the rport no
2931 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2932 * exists, but all sdevs on it are blocked from further I/O. The following
2935 * If the remote port does not return (signaled by a LLDD call to
2936 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2937 * scsi target is removed - killing all outstanding i/o and removing the
2938 * scsi devices attached ot it. The port structure will be marked Not
2939 * Present and be partially cleared, leaving only enough information to
2940 * recognize the remote port relative to the scsi target id binding if
2941 * it later appears. The port will remain as long as there is a valid
2942 * binding (e.g. until the user changes the binding type or unloads the
2943 * scsi host with the binding).
2945 * If the remote port returns within the dev_loss_tmo value (and matches
2946 * according to the target id binding type), the port structure will be
2947 * reused. If it is no longer a SCSI target, the target will be torn
2948 * down. If it continues to be a SCSI target, then the target will be
2949 * unblocked (allowing i/o to be resumed), and a scan will be activated
2950 * to ensure that all luns are detected.
2952 * Called from normal process context only - cannot be called from interrupt.
2955 * This routine assumes no locks are held on entry.
2958 fc_remote_port_delete(struct fc_rport *rport)
2960 struct Scsi_Host *shost = rport_to_shost(rport);
2961 unsigned long timeout = rport->dev_loss_tmo;
2962 unsigned long flags;
2965 * No need to flush the fc_host work_q's, as all adds are synchronous.
2967 * We do need to reclaim the rport scan work element, so eventually
2968 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2969 * there's still a scan pending.
2972 spin_lock_irqsave(shost->host_lock, flags);
2974 if (rport->port_state != FC_PORTSTATE_ONLINE) {
2975 spin_unlock_irqrestore(shost->host_lock, flags);
2980 * In the past, we if this was not an FCP-Target, we would
2981 * unconditionally just jump to deleting the rport.
2982 * However, rports can be used as node containers by the LLDD,
2983 * and its not appropriate to just terminate the rport at the
2984 * first sign of a loss in connectivity. The LLDD may want to
2985 * send ELS traffic to re-validate the login. If the rport is
2986 * immediately deleted, it makes it inappropriate for a node
2988 * So... we now unconditionally wait dev_loss_tmo before
2989 * destroying an rport.
2992 rport->port_state = FC_PORTSTATE_BLOCKED;
2994 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
2996 spin_unlock_irqrestore(shost->host_lock, flags);
2998 scsi_target_block(&rport->dev);
3000 /* see if we need to kill io faster than waiting for device loss */
3001 if ((rport->fast_io_fail_tmo != -1) &&
3002 (rport->fast_io_fail_tmo < timeout))
3003 fc_queue_devloss_work(shost, &rport->fail_io_work,
3004 rport->fast_io_fail_tmo * HZ);
3006 /* cap the length the devices can be blocked until they are deleted */
3007 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
3009 EXPORT_SYMBOL(fc_remote_port_delete);
3012 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
3013 * @rport: The remote port that changed.
3014 * @roles: New roles for this port.
3016 * Description: The LLDD calls this routine to notify the transport that the
3017 * roles on a remote port may have changed. The largest effect of this is
3018 * if a port now becomes a FCP Target, it must be allocated a
3019 * scsi target id. If the port is no longer a FCP target, any
3020 * scsi target id value assigned to it will persist in case the
3021 * role changes back to include FCP Target. No changes in the scsi
3022 * midlayer will be invoked if the role changes (in the expectation
3023 * that the role will be resumed. If it doesn't normal error processing
3026 * Should not be called from interrupt context.
3029 * This routine assumes no locks are held on entry.
3032 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
3034 struct Scsi_Host *shost = rport_to_shost(rport);
3035 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3036 unsigned long flags;
3039 spin_lock_irqsave(shost->host_lock, flags);
3040 if (roles & FC_PORT_ROLE_FCP_TARGET) {
3041 if (rport->scsi_target_id == -1) {
3042 rport->scsi_target_id = fc_host->next_target_id++;
3044 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
3048 rport->roles = roles;
3050 spin_unlock_irqrestore(shost->host_lock, flags);
3054 * There may have been a delete timer running on the
3055 * port. Ensure that it is cancelled as we now know
3056 * the port is an FCP Target.
3057 * Note: we know the rport is exists and in an online
3058 * state as the LLDD would not have had an rport
3059 * reference to pass us.
3061 * Take no action on the del_timer failure as the state
3062 * machine state change will validate the
3065 if (!cancel_delayed_work(&rport->fail_io_work))
3066 fc_flush_devloss(shost);
3067 if (!cancel_delayed_work(&rport->dev_loss_work))
3068 fc_flush_devloss(shost);
3070 spin_lock_irqsave(shost->host_lock, flags);
3071 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3072 FC_RPORT_DEVLOSS_PENDING |
3073 FC_RPORT_DEVLOSS_CALLBK_DONE);
3074 spin_unlock_irqrestore(shost->host_lock, flags);
3076 /* ensure any stgt delete functions are done */
3077 fc_flush_work(shost);
3079 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
3080 /* initiate a scan of the target */
3081 spin_lock_irqsave(shost->host_lock, flags);
3082 rport->flags |= FC_RPORT_SCAN_PENDING;
3083 scsi_queue_work(shost, &rport->scan_work);
3084 spin_unlock_irqrestore(shost->host_lock, flags);
3087 EXPORT_SYMBOL(fc_remote_port_rolechg);
3090 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3091 * @work: rport target that failed to reappear in the allotted time.
3093 * Description: An attempt to delete a remote port blocks, and if it fails
3094 * to return in the allotted time this gets called.
3097 fc_timeout_deleted_rport(struct work_struct *work)
3099 struct fc_rport *rport =
3100 container_of(work, struct fc_rport, dev_loss_work.work);
3101 struct Scsi_Host *shost = rport_to_shost(rport);
3102 struct fc_internal *i = to_fc_internal(shost->transportt);
3103 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3104 unsigned long flags;
3105 int do_callback = 0;
3107 spin_lock_irqsave(shost->host_lock, flags);
3109 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3112 * If the port is ONLINE, then it came back. If it was a SCSI
3113 * target, validate it still is. If not, tear down the
3114 * scsi_target on it.
3116 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3117 (rport->scsi_target_id != -1) &&
3118 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
3119 dev_printk(KERN_ERR, &rport->dev,
3120 "blocked FC remote port time out: no longer"
3121 " a FCP target, removing starget\n");
3122 spin_unlock_irqrestore(shost->host_lock, flags);
3123 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
3124 fc_queue_work(shost, &rport->stgt_delete_work);
3128 /* NOOP state - we're flushing workq's */
3129 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3130 spin_unlock_irqrestore(shost->host_lock, flags);
3131 dev_printk(KERN_ERR, &rport->dev,
3132 "blocked FC remote port time out: leaving"
3134 (rport->scsi_target_id != -1) ? " and starget" : "");
3138 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3139 (rport->scsi_target_id == -1)) {
3140 list_del(&rport->peers);
3141 rport->port_state = FC_PORTSTATE_DELETED;
3142 dev_printk(KERN_ERR, &rport->dev,
3143 "blocked FC remote port time out: removing"
3145 (rport->scsi_target_id != -1) ? " and starget" : "");
3146 fc_queue_work(shost, &rport->rport_delete_work);
3147 spin_unlock_irqrestore(shost->host_lock, flags);
3151 dev_printk(KERN_ERR, &rport->dev,
3152 "blocked FC remote port time out: removing target and "
3153 "saving binding\n");
3155 list_move_tail(&rport->peers, &fc_host->rport_bindings);
3158 * Note: We do not remove or clear the hostdata area. This allows
3159 * host-specific target data to persist along with the
3160 * scsi_target_id. It's up to the host to manage it's hostdata area.
3164 * Reinitialize port attributes that may change if the port comes back.
3166 rport->maxframe_size = -1;
3167 rport->supported_classes = FC_COS_UNSPECIFIED;
3168 rport->roles = FC_PORT_ROLE_UNKNOWN;
3169 rport->port_state = FC_PORTSTATE_NOTPRESENT;
3170 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3173 * Pre-emptively kill I/O rather than waiting for the work queue
3174 * item to teardown the starget. (FCOE libFC folks prefer this
3175 * and to have the rport_port_id still set when it's done).
3177 spin_unlock_irqrestore(shost->host_lock, flags);
3178 fc_terminate_rport_io(rport);
3180 spin_lock_irqsave(shost->host_lock, flags);
3182 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */
3184 /* remove the identifiers that aren't used in the consisting binding */
3185 switch (fc_host->tgtid_bind_type) {
3186 case FC_TGTID_BIND_BY_WWPN:
3187 rport->node_name = -1;
3188 rport->port_id = -1;
3190 case FC_TGTID_BIND_BY_WWNN:
3191 rport->port_name = -1;
3192 rport->port_id = -1;
3194 case FC_TGTID_BIND_BY_ID:
3195 rport->node_name = -1;
3196 rport->port_name = -1;
3198 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3203 * As this only occurs if the remote port (scsi target)
3204 * went away and didn't come back - we'll remove
3205 * all attached scsi devices.
3207 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3208 fc_queue_work(shost, &rport->stgt_delete_work);
3213 spin_unlock_irqrestore(shost->host_lock, flags);
3216 * Notify the driver that the rport is now dead. The LLDD will
3217 * also guarantee that any communication to the rport is terminated
3219 * Note: we set the CALLBK_DONE flag above to correspond
3221 if (do_callback && i->f->dev_loss_tmo_callbk)
3222 i->f->dev_loss_tmo_callbk(rport);
3227 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3228 * @work: rport to terminate io on.
3230 * Notes: Only requests the failure of the io, not that all are flushed
3231 * prior to returning.
3234 fc_timeout_fail_rport_io(struct work_struct *work)
3236 struct fc_rport *rport =
3237 container_of(work, struct fc_rport, fail_io_work.work);
3239 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3242 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3243 fc_terminate_rport_io(rport);
3247 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3248 * @work: remote port to be scanned.
3251 fc_scsi_scan_rport(struct work_struct *work)
3253 struct fc_rport *rport =
3254 container_of(work, struct fc_rport, scan_work);
3255 struct Scsi_Host *shost = rport_to_shost(rport);
3256 struct fc_internal *i = to_fc_internal(shost->transportt);
3257 unsigned long flags;
3259 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3260 (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3261 !(i->f->disable_target_scan)) {
3262 scsi_scan_target(&rport->dev, rport->channel,
3263 rport->scsi_target_id, SCAN_WILD_CARD,
3267 spin_lock_irqsave(shost->host_lock, flags);
3268 rport->flags &= ~FC_RPORT_SCAN_PENDING;
3269 spin_unlock_irqrestore(shost->host_lock, flags);
3273 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3274 * @cmnd: SCSI command that scsi_eh is trying to recover
3276 * This routine can be called from a FC LLD scsi_eh callback. It
3277 * blocks the scsi_eh thread until the fc_rport leaves the
3278 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3279 * necessary to avoid the scsi_eh failing recovery actions for blocked
3280 * rports which would lead to offlined SCSI devices.
3282 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3283 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3284 * passed back to scsi_eh.
3286 int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
3288 struct Scsi_Host *shost = cmnd->device->host;
3289 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3290 unsigned long flags;
3292 spin_lock_irqsave(shost->host_lock, flags);
3293 while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3294 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
3295 spin_unlock_irqrestore(shost->host_lock, flags);
3297 spin_lock_irqsave(shost->host_lock, flags);
3299 spin_unlock_irqrestore(shost->host_lock, flags);
3301 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3302 return FAST_IO_FAIL;
3306 EXPORT_SYMBOL(fc_block_scsi_eh);
3309 * fc_vport_setup - allocates and creates a FC virtual port.
3310 * @shost: scsi host the virtual port is connected to.
3311 * @channel: Channel on shost port connected to.
3312 * @pdev: parent device for vport
3313 * @ids: The world wide names, FC4 port roles, etc for
3315 * @ret_vport: The pointer to the created vport.
3317 * Allocates and creates the vport structure, calls the parent host
3318 * to instantiate the vport, the completes w/ class and sysfs creation.
3321 * This routine assumes no locks are held on entry.
3324 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
3325 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3327 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3328 struct fc_internal *fci = to_fc_internal(shost->transportt);
3329 struct fc_vport *vport;
3331 unsigned long flags;
3337 if ( ! fci->f->vport_create)
3340 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3341 vport = kzalloc(size, GFP_KERNEL);
3342 if (unlikely(!vport)) {
3343 printk(KERN_ERR "%s: allocation failure\n", __func__);
3347 vport->vport_state = FC_VPORT_UNKNOWN;
3348 vport->vport_last_state = FC_VPORT_UNKNOWN;
3349 vport->node_name = ids->node_name;
3350 vport->port_name = ids->port_name;
3351 vport->roles = ids->roles;
3352 vport->vport_type = ids->vport_type;
3353 if (fci->f->dd_fcvport_size)
3354 vport->dd_data = &vport[1];
3355 vport->shost = shost;
3356 vport->channel = channel;
3357 vport->flags = FC_VPORT_CREATING;
3358 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
3360 spin_lock_irqsave(shost->host_lock, flags);
3362 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3363 spin_unlock_irqrestore(shost->host_lock, flags);
3367 fc_host->npiv_vports_inuse++;
3368 vport->number = fc_host->next_vport_number++;
3369 list_add_tail(&vport->peers, &fc_host->vports);
3370 scsi_host_get(shost); /* for fc_host->vport list */
3372 spin_unlock_irqrestore(shost->host_lock, flags);
3375 device_initialize(dev); /* takes self reference */
3376 dev->parent = get_device(pdev); /* takes parent reference */
3377 dev->release = fc_vport_dev_release;
3378 dev_set_name(dev, "vport-%d:%d-%d",
3379 shost->host_no, channel, vport->number);
3380 transport_setup_device(dev);
3382 error = device_add(dev);
3384 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3387 transport_add_device(dev);
3388 transport_configure_device(dev);
3390 error = fci->f->vport_create(vport, ids->disable);
3392 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3393 goto delete_vport_all;
3397 * if the parent isn't the physical adapter's Scsi_Host, ensure
3398 * the Scsi_Host at least contains ia symlink to the vport.
3400 if (pdev != &shost->shost_gendev) {
3401 error = sysfs_create_link(&shost->shost_gendev.kobj,
3402 &dev->kobj, dev_name(dev));
3405 "%s: Cannot create vport symlinks for "
3407 __func__, dev_name(dev), error);
3409 spin_lock_irqsave(shost->host_lock, flags);
3410 vport->flags &= ~FC_VPORT_CREATING;
3411 spin_unlock_irqrestore(shost->host_lock, flags);
3413 dev_printk(KERN_NOTICE, pdev,
3414 "%s created via shost%d channel %d\n", dev_name(dev),
3415 shost->host_no, channel);
3422 transport_remove_device(dev);
3425 transport_destroy_device(dev);
3426 spin_lock_irqsave(shost->host_lock, flags);
3427 list_del(&vport->peers);
3428 scsi_host_put(shost); /* for fc_host->vport list */
3429 fc_host->npiv_vports_inuse--;
3430 spin_unlock_irqrestore(shost->host_lock, flags);
3431 put_device(dev->parent);
3438 * fc_vport_create - Admin App or LLDD requests creation of a vport
3439 * @shost: scsi host the virtual port is connected to.
3440 * @channel: channel on shost port connected to.
3441 * @ids: The world wide names, FC4 port roles, etc for
3445 * This routine assumes no locks are held on entry.
3448 fc_vport_create(struct Scsi_Host *shost, int channel,
3449 struct fc_vport_identifiers *ids)
3452 struct fc_vport *vport;
3454 stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3456 return stat ? NULL : vport;
3458 EXPORT_SYMBOL(fc_vport_create);
3461 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3462 * @vport: fc_vport to be terminated
3464 * Calls the LLDD vport_delete() function, then deallocates and removes
3465 * the vport from the shost and object tree.
3468 * This routine assumes no locks are held on entry.
3471 fc_vport_terminate(struct fc_vport *vport)
3473 struct Scsi_Host *shost = vport_to_shost(vport);
3474 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3475 struct fc_internal *i = to_fc_internal(shost->transportt);
3476 struct device *dev = &vport->dev;
3477 unsigned long flags;
3480 if (i->f->vport_delete)
3481 stat = i->f->vport_delete(vport);
3485 spin_lock_irqsave(shost->host_lock, flags);
3486 vport->flags &= ~FC_VPORT_DELETING;
3488 vport->flags |= FC_VPORT_DELETED;
3489 list_del(&vport->peers);
3490 fc_host->npiv_vports_inuse--;
3491 scsi_host_put(shost); /* for fc_host->vport list */
3493 spin_unlock_irqrestore(shost->host_lock, flags);
3498 if (dev->parent != &shost->shost_gendev)
3499 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
3500 transport_remove_device(dev);
3502 transport_destroy_device(dev);
3505 * Removing our self-reference should mean our
3506 * release function gets called, which will drop the remaining
3507 * parent reference and free the data structure.
3509 put_device(dev); /* for self-reference */
3511 return 0; /* SUCCESS */
3513 EXPORT_SYMBOL(fc_vport_terminate);
3516 * fc_vport_sched_delete - workq-based delete request for a vport
3517 * @work: vport to be deleted.
3520 fc_vport_sched_delete(struct work_struct *work)
3522 struct fc_vport *vport =
3523 container_of(work, struct fc_vport, vport_delete_work);
3526 stat = fc_vport_terminate(vport);
3528 dev_printk(KERN_ERR, vport->dev.parent,
3529 "%s: %s could not be deleted created via "
3530 "shost%d channel %d - error %d\n", __func__,
3531 dev_name(&vport->dev), vport->shost->host_no,
3532 vport->channel, stat);
3541 * fc_bsg_job_timeout - handler for when a bsg request timesout
3542 * @req: request that timed out
3544 static enum blk_eh_timer_return
3545 fc_bsg_job_timeout(struct request *req)
3547 struct bsg_job *job = (void *) req->special;
3548 struct Scsi_Host *shost = fc_bsg_to_shost(job);
3549 struct fc_rport *rport = fc_bsg_to_rport(job);
3550 struct fc_internal *i = to_fc_internal(shost->transportt);
3551 int err = 0, inflight = 0;
3553 if (rport && rport->port_state == FC_PORTSTATE_BLOCKED)
3554 return BLK_EH_RESET_TIMER;
3556 inflight = bsg_job_get(job);
3558 if (inflight && i->f->bsg_timeout) {
3559 /* call LLDD to abort the i/o as it has timed out */
3560 err = i->f->bsg_timeout(job);
3561 if (err == -EAGAIN) {
3563 return BLK_EH_RESET_TIMER;
3565 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3566 "abort failed with status %d\n", err);
3569 /* the blk_end_sync_io() doesn't check the error */
3571 return BLK_EH_NOT_HANDLED;
3573 return BLK_EH_HANDLED;
3577 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
3578 * @shost: scsi host rport attached to
3579 * @job: bsg job to be processed
3581 static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
3583 struct fc_internal *i = to_fc_internal(shost->transportt);
3584 struct fc_bsg_request *bsg_request = job->request;
3585 struct fc_bsg_reply *bsg_reply = job->reply;
3586 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3589 /* check if we really have all the request data needed */
3590 if (job->request_len < cmdlen) {
3595 /* Validate the host command */
3596 switch (bsg_request->msgcode) {
3597 case FC_BSG_HST_ADD_RPORT:
3598 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3601 case FC_BSG_HST_DEL_RPORT:
3602 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3605 case FC_BSG_HST_ELS_NOLOGIN:
3606 cmdlen += sizeof(struct fc_bsg_host_els);
3607 /* there better be a xmt and rcv payloads */
3608 if ((!job->request_payload.payload_len) ||
3609 (!job->reply_payload.payload_len)) {
3616 cmdlen += sizeof(struct fc_bsg_host_ct);
3617 /* there better be xmt and rcv payloads */
3618 if ((!job->request_payload.payload_len) ||
3619 (!job->reply_payload.payload_len)) {
3625 case FC_BSG_HST_VENDOR:
3626 cmdlen += sizeof(struct fc_bsg_host_vendor);
3627 if ((shost->hostt->vendor_id == 0L) ||
3628 (bsg_request->rqst_data.h_vendor.vendor_id !=
3629 shost->hostt->vendor_id)) {
3640 ret = i->f->bsg_request(job);
3645 /* return the errno failure code as the only status */
3646 BUG_ON(job->reply_len < sizeof(uint32_t));
3647 bsg_reply->reply_payload_rcv_len = 0;
3648 bsg_reply->result = ret;
3649 job->reply_len = sizeof(uint32_t);
3650 bsg_job_done(job, bsg_reply->result,
3651 bsg_reply->reply_payload_rcv_len);
3657 * fc_bsg_goose_queue - restart rport queue in case it was stopped
3658 * @rport: rport to be restarted
3661 fc_bsg_goose_queue(struct fc_rport *rport)
3663 struct request_queue *q = rport->rqst_q;
3664 unsigned long flags;
3669 spin_lock_irqsave(q->queue_lock, flags);
3670 blk_run_queue_async(q);
3671 spin_unlock_irqrestore(q->queue_lock, flags);
3675 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
3676 * @shost: scsi host rport attached to
3677 * @job: bsg job to be processed
3679 static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
3681 struct fc_internal *i = to_fc_internal(shost->transportt);
3682 struct fc_bsg_request *bsg_request = job->request;
3683 struct fc_bsg_reply *bsg_reply = job->reply;
3684 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3687 /* check if we really have all the request data needed */
3688 if (job->request_len < cmdlen) {
3690 goto fail_rport_msg;
3693 /* Validate the rport command */
3694 switch (bsg_request->msgcode) {
3695 case FC_BSG_RPT_ELS:
3696 cmdlen += sizeof(struct fc_bsg_rport_els);
3700 cmdlen += sizeof(struct fc_bsg_rport_ct);
3702 /* there better be xmt and rcv payloads */
3703 if ((!job->request_payload.payload_len) ||
3704 (!job->reply_payload.payload_len)) {
3706 goto fail_rport_msg;
3711 goto fail_rport_msg;
3714 ret = i->f->bsg_request(job);
3719 /* return the errno failure code as the only status */
3720 BUG_ON(job->reply_len < sizeof(uint32_t));
3721 bsg_reply->reply_payload_rcv_len = 0;
3722 bsg_reply->result = ret;
3723 job->reply_len = sizeof(uint32_t);
3724 bsg_job_done(job, bsg_reply->result,
3725 bsg_reply->reply_payload_rcv_len);
3729 static int fc_bsg_dispatch(struct bsg_job *job)
3731 struct Scsi_Host *shost = fc_bsg_to_shost(job);
3733 if (scsi_is_fc_rport(job->dev))
3734 return fc_bsg_rport_dispatch(shost, job);
3736 return fc_bsg_host_dispatch(shost, job);
3740 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
3741 * @shost: shost for fc_host
3742 * @fc_host: fc_host adding the structures to
3745 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
3747 struct device *dev = &shost->shost_gendev;
3748 struct fc_internal *i = to_fc_internal(shost->transportt);
3749 struct request_queue *q;
3752 fc_host->rqst_q = NULL;
3754 if (!i->f->bsg_request)
3757 snprintf(bsg_name, sizeof(bsg_name),
3758 "fc_host%d", shost->host_no);
3760 q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, i->f->dd_bsg_size);
3763 "fc_host%d: bsg interface failed to initialize - setup queue\n",
3767 __scsi_init_queue(shost, q);
3768 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
3769 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
3770 fc_host->rqst_q = q;
3774 static int fc_bsg_rport_prep(struct request_queue *q, struct request *req)
3776 struct fc_rport *rport = dev_to_rport(q->queuedata);
3778 if (rport->port_state == FC_PORTSTATE_BLOCKED &&
3779 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
3780 return BLKPREP_DEFER;
3782 if (rport->port_state != FC_PORTSTATE_ONLINE)
3783 return BLKPREP_KILL;
3789 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
3790 * @shost: shost that rport is attached to
3791 * @rport: rport that the bsg hooks are being attached to
3794 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
3796 struct device *dev = &rport->dev;
3797 struct fc_internal *i = to_fc_internal(shost->transportt);
3798 struct request_queue *q;
3800 rport->rqst_q = NULL;
3802 if (!i->f->bsg_request)
3805 q = bsg_setup_queue(dev, NULL, fc_bsg_dispatch, i->f->dd_bsg_size);
3807 dev_err(dev, "failed to setup bsg queue\n");
3810 __scsi_init_queue(shost, q);
3811 blk_queue_prep_rq(q, fc_bsg_rport_prep);
3812 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
3813 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
3820 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
3821 * @q: the request_queue that is to be torn down.
3824 * Before unregistering the queue empty any requests that are blocked
3829 fc_bsg_remove(struct request_queue *q)
3832 bsg_unregister_queue(q);
3833 blk_cleanup_queue(q);
3838 /* Original Author: Martin Hicks */
3839 MODULE_AUTHOR("James Smart");
3840 MODULE_DESCRIPTION("FC Transport Attributes");
3841 MODULE_LICENSE("GPL");
3843 module_init(fc_transport_init);
3844 module_exit(fc_transport_exit);