1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * FiberChannel transport specific attributes exported to sysfs.
5 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
6 * Copyright (C) 2004-2007 James Smart, Emulex Corporation
7 * Rewrite for host, target, device, and remote port attributes,
8 * statistics, and service functions...
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/slab.h>
14 #include <linux/delay.h>
15 #include <linux/kernel.h>
16 #include <linux/bsg-lib.h>
17 #include <scsi/scsi_device.h>
18 #include <scsi/scsi_host.h>
19 #include <scsi/scsi_transport.h>
20 #include <scsi/scsi_transport_fc.h>
21 #include <scsi/scsi_cmnd.h>
22 #include <net/netlink.h>
23 #include <scsi/scsi_netlink_fc.h>
24 #include <scsi/scsi_bsg_fc.h>
25 #include <uapi/scsi/fc/fc_els.h>
26 #include "scsi_priv.h"
28 static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
29 static void fc_vport_sched_delete(struct work_struct *work);
30 static int fc_vport_setup(struct Scsi_Host *shost, int channel,
31 struct device *pdev, struct fc_vport_identifiers *ids,
32 struct fc_vport **vport);
33 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
34 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
35 static void fc_bsg_remove(struct request_queue *);
36 static void fc_bsg_goose_queue(struct fc_rport *);
37 static void fc_li_stats_update(u16 event_type,
38 struct fc_fpin_stats *stats);
39 static void fc_delivery_stats_update(u32 reason_code,
40 struct fc_fpin_stats *stats);
41 static void fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats);
48 * dev_loss_tmo: the default number of seconds that the FC transport
49 * should insulate the loss of a remote port.
50 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
52 static unsigned int fc_dev_loss_tmo = 60; /* seconds */
54 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
55 MODULE_PARM_DESC(dev_loss_tmo,
56 "Maximum number of seconds that the FC transport should"
57 " insulate the loss of a remote port. Once this value is"
58 " exceeded, the scsi target is removed. Value should be"
59 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
60 " fast_io_fail_tmo is not set.");
63 * Redefine so that we can have same named attributes in the
64 * sdev/starget/host objects.
66 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
67 struct device_attribute device_attr_##_prefix##_##_name = \
68 __ATTR(_name,_mode,_show,_store)
70 #define fc_enum_name_search(title, table_type, table) \
71 static const char *get_fc_##title##_name(enum table_type table_key) \
76 for (i = 0; i < ARRAY_SIZE(table); i++) { \
77 if (table[i].value == table_key) { \
78 name = table[i].name; \
85 #define fc_enum_name_match(title, table_type, table) \
86 static int get_fc_##title##_match(const char *table_key, \
87 enum table_type *value) \
91 for (i = 0; i < ARRAY_SIZE(table); i++) { \
92 if (strncmp(table_key, table[i].name, \
93 table[i].matchlen) == 0) { \
94 *value = table[i].value; \
95 return 0; /* success */ \
98 return 1; /* failure */ \
102 /* Convert fc_port_type values to ascii string name */
104 enum fc_port_type value;
106 } fc_port_type_names[] = {
107 { FC_PORTTYPE_UNKNOWN, "Unknown" },
108 { FC_PORTTYPE_OTHER, "Other" },
109 { FC_PORTTYPE_NOTPRESENT, "Not Present" },
110 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
111 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
112 { FC_PORTTYPE_LPORT, "LPort (private loop)" },
113 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" },
114 { FC_PORTTYPE_NPIV, "NPIV VPORT" },
116 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
117 #define FC_PORTTYPE_MAX_NAMELEN 50
119 /* Reuse fc_port_type enum function for vport_type */
120 #define get_fc_vport_type_name get_fc_port_type_name
123 /* Convert fc_host_event_code values to ascii string name */
124 static const struct {
125 enum fc_host_event_code value;
127 } fc_host_event_code_names[] = {
128 { FCH_EVT_LIP, "lip" },
129 { FCH_EVT_LINKUP, "link_up" },
130 { FCH_EVT_LINKDOWN, "link_down" },
131 { FCH_EVT_LIPRESET, "lip_reset" },
132 { FCH_EVT_RSCN, "rscn" },
133 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
134 { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
135 { FCH_EVT_PORT_ONLINE, "port_online" },
136 { FCH_EVT_PORT_OFFLINE, "port_offline" },
137 { FCH_EVT_PORT_FABRIC, "port_fabric" },
138 { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
139 { FCH_EVT_LINK_FPIN, "link_FPIN" },
140 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
142 fc_enum_name_search(host_event_code, fc_host_event_code,
143 fc_host_event_code_names)
144 #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
147 /* Convert fc_port_state values to ascii string name */
149 enum fc_port_state value;
152 } fc_port_state_names[] = {
153 { FC_PORTSTATE_UNKNOWN, "Unknown", 7},
154 { FC_PORTSTATE_NOTPRESENT, "Not Present", 11 },
155 { FC_PORTSTATE_ONLINE, "Online", 6 },
156 { FC_PORTSTATE_OFFLINE, "Offline", 7 },
157 { FC_PORTSTATE_BLOCKED, "Blocked", 7 },
158 { FC_PORTSTATE_BYPASSED, "Bypassed", 8 },
159 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics", 11 },
160 { FC_PORTSTATE_LINKDOWN, "Linkdown", 8 },
161 { FC_PORTSTATE_ERROR, "Error", 5 },
162 { FC_PORTSTATE_LOOPBACK, "Loopback", 8 },
163 { FC_PORTSTATE_DELETED, "Deleted", 7 },
164 { FC_PORTSTATE_MARGINAL, "Marginal", 8 },
166 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
167 fc_enum_name_match(port_state, fc_port_state, fc_port_state_names)
168 #define FC_PORTSTATE_MAX_NAMELEN 20
171 /* Convert fc_vport_state values to ascii string name */
173 enum fc_vport_state value;
175 } fc_vport_state_names[] = {
176 { FC_VPORT_UNKNOWN, "Unknown" },
177 { FC_VPORT_ACTIVE, "Active" },
178 { FC_VPORT_DISABLED, "Disabled" },
179 { FC_VPORT_LINKDOWN, "Linkdown" },
180 { FC_VPORT_INITIALIZING, "Initializing" },
181 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" },
182 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" },
183 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" },
184 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" },
185 { FC_VPORT_FAILED, "VPort Failed" },
187 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
188 #define FC_VPORTSTATE_MAX_NAMELEN 24
190 /* Reuse fc_vport_state enum function for vport_last_state */
191 #define get_fc_vport_last_state_name get_fc_vport_state_name
194 /* Convert fc_tgtid_binding_type values to ascii string name */
195 static const struct {
196 enum fc_tgtid_binding_type value;
199 } fc_tgtid_binding_type_names[] = {
200 { FC_TGTID_BIND_NONE, "none", 4 },
201 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
202 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
203 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
205 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
206 fc_tgtid_binding_type_names)
207 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
208 fc_tgtid_binding_type_names)
209 #define FC_BINDTYPE_MAX_NAMELEN 30
212 #define fc_bitfield_name_search(title, table) \
214 get_fc_##title##_names(u32 table_key, char *buf) \
220 for (i = 0; i < ARRAY_SIZE(table); i++) { \
221 if (table[i].value & table_key) { \
222 len += sprintf(buf + len, "%s%s", \
223 prefix, table[i].name); \
227 len += sprintf(buf + len, "\n"); \
232 /* Convert FC_COS bit values to ascii string name */
233 static const struct {
237 { FC_COS_CLASS1, "Class 1" },
238 { FC_COS_CLASS2, "Class 2" },
239 { FC_COS_CLASS3, "Class 3" },
240 { FC_COS_CLASS4, "Class 4" },
241 { FC_COS_CLASS6, "Class 6" },
243 fc_bitfield_name_search(cos, fc_cos_names)
246 /* Convert FC_PORTSPEED bit values to ascii string name */
247 static const struct {
250 } fc_port_speed_names[] = {
251 { FC_PORTSPEED_1GBIT, "1 Gbit" },
252 { FC_PORTSPEED_2GBIT, "2 Gbit" },
253 { FC_PORTSPEED_4GBIT, "4 Gbit" },
254 { FC_PORTSPEED_10GBIT, "10 Gbit" },
255 { FC_PORTSPEED_8GBIT, "8 Gbit" },
256 { FC_PORTSPEED_16GBIT, "16 Gbit" },
257 { FC_PORTSPEED_32GBIT, "32 Gbit" },
258 { FC_PORTSPEED_20GBIT, "20 Gbit" },
259 { FC_PORTSPEED_40GBIT, "40 Gbit" },
260 { FC_PORTSPEED_50GBIT, "50 Gbit" },
261 { FC_PORTSPEED_100GBIT, "100 Gbit" },
262 { FC_PORTSPEED_25GBIT, "25 Gbit" },
263 { FC_PORTSPEED_64GBIT, "64 Gbit" },
264 { FC_PORTSPEED_128GBIT, "128 Gbit" },
265 { FC_PORTSPEED_256GBIT, "256 Gbit" },
266 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
268 fc_bitfield_name_search(port_speed, fc_port_speed_names)
272 show_fc_fc4s (char *buf, u8 *fc4_list)
276 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
277 len += sprintf(buf + len , "0x%02x ", *fc4_list);
278 len += sprintf(buf + len, "\n");
283 /* Convert FC_PORT_ROLE bit values to ascii string name */
284 static const struct {
287 } fc_port_role_names[] = {
288 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" },
289 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
290 { FC_PORT_ROLE_IP_PORT, "IP Port" },
291 { FC_PORT_ROLE_FCP_DUMMY_INITIATOR, "FCP Dummy Initiator" },
292 { FC_PORT_ROLE_NVME_INITIATOR, "NVMe Initiator" },
293 { FC_PORT_ROLE_NVME_TARGET, "NVMe Target" },
294 { FC_PORT_ROLE_NVME_DISCOVERY, "NVMe Discovery" },
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));
431 memset(&fc_host->fpin_stats, 0, sizeof(fc_host->fpin_stats));
433 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
435 INIT_LIST_HEAD(&fc_host->rports);
436 INIT_LIST_HEAD(&fc_host->rport_bindings);
437 INIT_LIST_HEAD(&fc_host->vports);
438 fc_host->next_rport_number = 0;
439 fc_host->next_target_id = 0;
440 fc_host->next_vport_number = 0;
441 fc_host->npiv_vports_inuse = 0;
443 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
444 "fc_wq_%d", shost->host_no);
445 fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
446 if (!fc_host->work_q)
449 fc_host->dev_loss_tmo = fc_dev_loss_tmo;
450 snprintf(fc_host->devloss_work_q_name,
451 sizeof(fc_host->devloss_work_q_name),
452 "fc_dl_%d", shost->host_no);
453 fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
454 fc_host->devloss_work_q_name);
455 if (!fc_host->devloss_work_q) {
456 destroy_workqueue(fc_host->work_q);
457 fc_host->work_q = NULL;
461 fc_bsg_hostadd(shost, fc_host);
462 /* ignore any bsg add error - we just can't do sgio */
467 static int fc_host_remove(struct transport_container *tc, struct device *dev,
470 struct Scsi_Host *shost = dev_to_shost(dev);
471 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
473 fc_bsg_remove(fc_host->rqst_q);
477 static DECLARE_TRANSPORT_CLASS(fc_host_class,
484 * Setup and Remove actions for remote ports are handled
485 * in the service functions below.
487 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
494 * Setup and Remove actions for virtual ports are handled
495 * in the service functions below.
497 static DECLARE_TRANSPORT_CLASS(fc_vport_class,
504 * Netlink Infrastructure
507 static atomic_t fc_event_seq;
510 * fc_get_event_number - Obtain the next sequential FC event number
513 * We could have inlined this, but it would have required fc_event_seq to
514 * be exposed. For now, live with the subroutine call.
515 * Atomic used to avoid lock/unlock...
518 fc_get_event_number(void)
520 return atomic_add_return(1, &fc_event_seq);
522 EXPORT_SYMBOL(fc_get_event_number);
525 * fc_host_post_fc_event - routine to do the work of posting an event
527 * @shost: host the event occurred on
528 * @event_number: fc event number obtained from get_fc_event_number()
529 * @event_code: fc_host event being posted
530 * @data_len: amount, in bytes, of event data
531 * @data_buf: pointer to event data
532 * @vendor_id: value for Vendor id
535 * This routine assumes no locks are held on entry.
538 fc_host_post_fc_event(struct Scsi_Host *shost, u32 event_number,
539 enum fc_host_event_code event_code,
540 u32 data_len, char *data_buf, u64 vendor_id)
543 struct nlmsghdr *nlh;
544 struct fc_nl_event *event;
549 if (!data_buf || data_len < 4)
557 len = FC_NL_MSGALIGN(sizeof(*event) - sizeof(event->event_data) + data_len);
559 skb = nlmsg_new(len, GFP_KERNEL);
565 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
570 event = nlmsg_data(nlh);
572 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
573 FC_NL_ASYNC_EVENT, len);
574 event->seconds = ktime_get_real_seconds();
575 event->vendor_id = vendor_id;
576 event->host_no = shost->host_no;
577 event->event_datalen = data_len; /* bytes */
578 event->event_num = event_number;
579 event->event_code = event_code;
581 memcpy(event->event_data_flex, data_buf, data_len);
582 padding = len - offsetof(typeof(*event), event_data_flex) - data_len;
583 memset(event->event_data_flex + data_len, 0, padding);
585 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
592 name = get_fc_host_event_code_name(event_code);
594 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
595 __func__, shost->host_no,
596 (name) ? name : "<unknown>",
597 (data_len) ? *((u32 *)data_buf) : 0xFFFFFFFF, err);
600 EXPORT_SYMBOL(fc_host_post_fc_event);
603 * fc_host_post_event - called to post an even on an fc_host.
604 * @shost: host the event occurred on
605 * @event_number: fc event number obtained from get_fc_event_number()
606 * @event_code: fc_host event being posted
607 * @event_data: 32bits of data for the event being posted
610 * This routine assumes no locks are held on entry.
613 fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
614 enum fc_host_event_code event_code, u32 event_data)
616 fc_host_post_fc_event(shost, event_number, event_code,
617 (u32)sizeof(u32), (char *)&event_data, 0);
619 EXPORT_SYMBOL(fc_host_post_event);
623 * fc_host_post_vendor_event - called to post a vendor unique event
625 * @shost: host the event occurred on
626 * @event_number: fc event number obtained from get_fc_event_number()
627 * @data_len: amount, in bytes, of vendor unique data
628 * @data_buf: pointer to vendor unique data
629 * @vendor_id: Vendor id
632 * This routine assumes no locks are held on entry.
635 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
636 u32 data_len, char * data_buf, u64 vendor_id)
638 fc_host_post_fc_event(shost, event_number, FCH_EVT_VENDOR_UNIQUE,
639 data_len, data_buf, vendor_id);
641 EXPORT_SYMBOL(fc_host_post_vendor_event);
644 * fc_find_rport_by_wwpn - find the fc_rport pointer for a given wwpn
645 * @shost: host the fc_rport is associated with
646 * @wwpn: wwpn of the fc_rport device
649 * This routine assumes no locks are held on entry.
652 fc_find_rport_by_wwpn(struct Scsi_Host *shost, u64 wwpn)
654 struct fc_rport *rport;
657 spin_lock_irqsave(shost->host_lock, flags);
659 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
660 if (rport->port_state != FC_PORTSTATE_ONLINE)
663 if (rport->port_name == wwpn) {
664 spin_unlock_irqrestore(shost->host_lock, flags);
669 spin_unlock_irqrestore(shost->host_lock, flags);
672 EXPORT_SYMBOL(fc_find_rport_by_wwpn);
675 fc_li_stats_update(u16 event_type,
676 struct fc_fpin_stats *stats)
679 switch (event_type) {
680 case FPIN_LI_UNKNOWN:
681 stats->li_failure_unknown++;
683 case FPIN_LI_LINK_FAILURE:
684 stats->li_link_failure_count++;
686 case FPIN_LI_LOSS_OF_SYNC:
687 stats->li_loss_of_sync_count++;
689 case FPIN_LI_LOSS_OF_SIG:
690 stats->li_loss_of_signals_count++;
692 case FPIN_LI_PRIM_SEQ_ERR:
693 stats->li_prim_seq_err_count++;
695 case FPIN_LI_INVALID_TX_WD:
696 stats->li_invalid_tx_word_count++;
698 case FPIN_LI_INVALID_CRC:
699 stats->li_invalid_crc_count++;
701 case FPIN_LI_DEVICE_SPEC:
702 stats->li_device_specific++;
708 fc_delivery_stats_update(u32 reason_code, struct fc_fpin_stats *stats)
711 switch (reason_code) {
712 case FPIN_DELI_UNKNOWN:
715 case FPIN_DELI_TIMEOUT:
718 case FPIN_DELI_UNABLE_TO_ROUTE:
719 stats->dn_unable_to_route++;
721 case FPIN_DELI_DEVICE_SPEC:
722 stats->dn_device_specific++;
728 fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats)
731 switch (event_type) {
732 case FPIN_CONGN_CLEAR:
735 case FPIN_CONGN_LOST_CREDIT:
736 stats->cn_lost_credit++;
738 case FPIN_CONGN_CREDIT_STALL:
739 stats->cn_credit_stall++;
741 case FPIN_CONGN_OVERSUBSCRIPTION:
742 stats->cn_oversubscription++;
744 case FPIN_CONGN_DEVICE_SPEC:
745 stats->cn_device_specific++;
750 * fc_fpin_li_stats_update - routine to update Link Integrity
752 * @shost: host the FPIN was received on
753 * @tlv: pointer to link integrity descriptor
757 fc_fpin_li_stats_update(struct Scsi_Host *shost, struct fc_tlv_desc *tlv)
760 struct fc_rport *rport = NULL;
761 struct fc_rport *attach_rport = NULL;
762 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
763 struct fc_fn_li_desc *li_desc = (struct fc_fn_li_desc *)tlv;
764 u16 event_type = be16_to_cpu(li_desc->event_type);
767 rport = fc_find_rport_by_wwpn(shost,
768 be64_to_cpu(li_desc->attached_wwpn));
770 (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
771 rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
772 attach_rport = rport;
773 fc_li_stats_update(event_type, &attach_rport->fpin_stats);
776 if (be32_to_cpu(li_desc->pname_count) > 0) {
778 i < be32_to_cpu(li_desc->pname_count);
780 wwpn = be64_to_cpu(li_desc->pname_list[i]);
781 rport = fc_find_rport_by_wwpn(shost, wwpn);
783 (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
784 rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
785 if (rport == attach_rport)
787 fc_li_stats_update(event_type,
793 if (fc_host->port_name == be64_to_cpu(li_desc->attached_wwpn))
794 fc_li_stats_update(event_type, &fc_host->fpin_stats);
798 * fc_fpin_delivery_stats_update - routine to update Delivery Notification
800 * @shost: host the FPIN was received on
801 * @tlv: pointer to delivery descriptor
805 fc_fpin_delivery_stats_update(struct Scsi_Host *shost,
806 struct fc_tlv_desc *tlv)
808 struct fc_rport *rport = NULL;
809 struct fc_rport *attach_rport = NULL;
810 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
811 struct fc_fn_deli_desc *dn_desc = (struct fc_fn_deli_desc *)tlv;
812 u32 reason_code = be32_to_cpu(dn_desc->deli_reason_code);
814 rport = fc_find_rport_by_wwpn(shost,
815 be64_to_cpu(dn_desc->attached_wwpn));
817 (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
818 rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
819 attach_rport = rport;
820 fc_delivery_stats_update(reason_code,
821 &attach_rport->fpin_stats);
824 if (fc_host->port_name == be64_to_cpu(dn_desc->attached_wwpn))
825 fc_delivery_stats_update(reason_code, &fc_host->fpin_stats);
829 * fc_fpin_peer_congn_stats_update - routine to update Peer Congestion
831 * @shost: host the FPIN was received on
832 * @tlv: pointer to peer congestion descriptor
836 fc_fpin_peer_congn_stats_update(struct Scsi_Host *shost,
837 struct fc_tlv_desc *tlv)
840 struct fc_rport *rport = NULL;
841 struct fc_rport *attach_rport = NULL;
842 struct fc_fn_peer_congn_desc *pc_desc =
843 (struct fc_fn_peer_congn_desc *)tlv;
844 u16 event_type = be16_to_cpu(pc_desc->event_type);
847 rport = fc_find_rport_by_wwpn(shost,
848 be64_to_cpu(pc_desc->attached_wwpn));
850 (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
851 rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
852 attach_rport = rport;
853 fc_cn_stats_update(event_type, &attach_rport->fpin_stats);
856 if (be32_to_cpu(pc_desc->pname_count) > 0) {
858 i < be32_to_cpu(pc_desc->pname_count);
860 wwpn = be64_to_cpu(pc_desc->pname_list[i]);
861 rport = fc_find_rport_by_wwpn(shost, wwpn);
863 (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
864 rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
865 if (rport == attach_rport)
867 fc_cn_stats_update(event_type,
875 * fc_fpin_congn_stats_update - routine to update Congestion
877 * @shost: host the FPIN was received on
878 * @tlv: pointer to congestion descriptor
882 fc_fpin_congn_stats_update(struct Scsi_Host *shost,
883 struct fc_tlv_desc *tlv)
885 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
886 struct fc_fn_congn_desc *congn = (struct fc_fn_congn_desc *)tlv;
888 fc_cn_stats_update(be16_to_cpu(congn->event_type),
889 &fc_host->fpin_stats);
893 * fc_host_fpin_rcv - routine to process a received FPIN.
894 * @shost: host the FPIN was received on
895 * @fpin_len: length of FPIN payload, in bytes
896 * @fpin_buf: pointer to FPIN payload
899 * This routine assumes no locks are held on entry.
902 fc_host_fpin_rcv(struct Scsi_Host *shost, u32 fpin_len, char *fpin_buf)
904 struct fc_els_fpin *fpin = (struct fc_els_fpin *)fpin_buf;
905 struct fc_tlv_desc *tlv;
906 u32 desc_cnt = 0, bytes_remain;
909 /* Update Statistics */
910 tlv = (struct fc_tlv_desc *)&fpin->fpin_desc[0];
911 bytes_remain = fpin_len - offsetof(struct fc_els_fpin, fpin_desc);
912 bytes_remain = min_t(u32, bytes_remain, be32_to_cpu(fpin->desc_len));
914 while (bytes_remain >= FC_TLV_DESC_HDR_SZ &&
915 bytes_remain >= FC_TLV_DESC_SZ_FROM_LENGTH(tlv)) {
916 dtag = be32_to_cpu(tlv->desc_tag);
918 case ELS_DTAG_LNK_INTEGRITY:
919 fc_fpin_li_stats_update(shost, tlv);
921 case ELS_DTAG_DELIVERY:
922 fc_fpin_delivery_stats_update(shost, tlv);
924 case ELS_DTAG_PEER_CONGEST:
925 fc_fpin_peer_congn_stats_update(shost, tlv);
927 case ELS_DTAG_CONGESTION:
928 fc_fpin_congn_stats_update(shost, tlv);
932 bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
933 tlv = fc_tlv_next_desc(tlv);
936 fc_host_post_fc_event(shost, fc_get_event_number(),
937 FCH_EVT_LINK_FPIN, fpin_len, fpin_buf, 0);
939 EXPORT_SYMBOL(fc_host_fpin_rcv);
942 static __init int fc_transport_init(void)
946 atomic_set(&fc_event_seq, 0);
948 error = transport_class_register(&fc_host_class);
951 error = transport_class_register(&fc_vport_class);
953 goto unreg_host_class;
954 error = transport_class_register(&fc_rport_class);
956 goto unreg_vport_class;
957 error = transport_class_register(&fc_transport_class);
959 goto unreg_rport_class;
963 transport_class_unregister(&fc_rport_class);
965 transport_class_unregister(&fc_vport_class);
967 transport_class_unregister(&fc_host_class);
971 static void __exit fc_transport_exit(void)
973 transport_class_unregister(&fc_transport_class);
974 transport_class_unregister(&fc_rport_class);
975 transport_class_unregister(&fc_host_class);
976 transport_class_unregister(&fc_vport_class);
980 * FC Remote Port Attribute Management
983 #define fc_rport_show_function(field, format_string, sz, cast) \
985 show_fc_rport_##field (struct device *dev, \
986 struct device_attribute *attr, char *buf) \
988 struct fc_rport *rport = transport_class_to_rport(dev); \
989 struct Scsi_Host *shost = rport_to_shost(rport); \
990 struct fc_internal *i = to_fc_internal(shost->transportt); \
991 if ((i->f->get_rport_##field) && \
992 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
993 (rport->port_state == FC_PORTSTATE_DELETED) || \
994 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
995 i->f->get_rport_##field(rport); \
996 return snprintf(buf, sz, format_string, cast rport->field); \
999 #define fc_rport_store_function(field) \
1001 store_fc_rport_##field(struct device *dev, \
1002 struct device_attribute *attr, \
1003 const char *buf, size_t count) \
1006 struct fc_rport *rport = transport_class_to_rport(dev); \
1007 struct Scsi_Host *shost = rport_to_shost(rport); \
1008 struct fc_internal *i = to_fc_internal(shost->transportt); \
1010 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
1011 (rport->port_state == FC_PORTSTATE_DELETED) || \
1012 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
1014 val = simple_strtoul(buf, &cp, 0); \
1015 if (*cp && (*cp != '\n')) \
1017 i->f->set_rport_##field(rport, val); \
1021 #define fc_rport_rd_attr(field, format_string, sz) \
1022 fc_rport_show_function(field, format_string, sz, ) \
1023 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1024 show_fc_rport_##field, NULL)
1026 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
1027 fc_rport_show_function(field, format_string, sz, (cast)) \
1028 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1029 show_fc_rport_##field, NULL)
1031 #define fc_rport_rw_attr(field, format_string, sz) \
1032 fc_rport_show_function(field, format_string, sz, ) \
1033 fc_rport_store_function(field) \
1034 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
1035 show_fc_rport_##field, \
1036 store_fc_rport_##field)
1039 #define fc_private_rport_show_function(field, format_string, sz, cast) \
1041 show_fc_rport_##field (struct device *dev, \
1042 struct device_attribute *attr, char *buf) \
1044 struct fc_rport *rport = transport_class_to_rport(dev); \
1045 return snprintf(buf, sz, format_string, cast rport->field); \
1048 #define fc_private_rport_rd_attr(field, format_string, sz) \
1049 fc_private_rport_show_function(field, format_string, sz, ) \
1050 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1051 show_fc_rport_##field, NULL)
1053 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
1054 fc_private_rport_show_function(field, format_string, sz, (cast)) \
1055 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1056 show_fc_rport_##field, NULL)
1059 #define fc_private_rport_rd_enum_attr(title, maxlen) \
1061 show_fc_rport_##title (struct device *dev, \
1062 struct device_attribute *attr, char *buf) \
1064 struct fc_rport *rport = transport_class_to_rport(dev); \
1066 name = get_fc_##title##_name(rport->title); \
1069 return snprintf(buf, maxlen, "%s\n", name); \
1071 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
1072 show_fc_rport_##title, NULL)
1075 #define SETUP_RPORT_ATTRIBUTE_RD(field) \
1076 i->private_rport_attrs[count] = device_attr_rport_##field; \
1077 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
1078 i->private_rport_attrs[count].store = NULL; \
1079 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
1080 if (i->f->show_rport_##field) \
1083 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
1084 i->private_rport_attrs[count] = device_attr_rport_##field; \
1085 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
1086 i->private_rport_attrs[count].store = NULL; \
1087 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
1090 #define SETUP_RPORT_ATTRIBUTE_RW(field) \
1091 i->private_rport_attrs[count] = device_attr_rport_##field; \
1092 if (!i->f->set_rport_##field) { \
1093 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
1094 i->private_rport_attrs[count].store = NULL; \
1096 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
1097 if (i->f->show_rport_##field) \
1100 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
1102 i->private_rport_attrs[count] = device_attr_rport_##field; \
1103 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
1108 /* The FC Transport Remote Port Attributes: */
1110 /* Fixed Remote Port Attributes */
1112 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
1115 show_fc_rport_supported_classes (struct device *dev,
1116 struct device_attribute *attr, char *buf)
1118 struct fc_rport *rport = transport_class_to_rport(dev);
1119 if (rport->supported_classes == FC_COS_UNSPECIFIED)
1120 return snprintf(buf, 20, "unspecified\n");
1121 return get_fc_cos_names(rport->supported_classes, buf);
1123 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
1124 show_fc_rport_supported_classes, NULL);
1126 /* Dynamic Remote Port Attributes */
1129 * dev_loss_tmo attribute
1131 static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
1135 *val = simple_strtoul(buf, &cp, 0);
1136 if (*cp && (*cp != '\n'))
1139 * Check for overflow; dev_loss_tmo is u32
1141 if (*val > UINT_MAX)
1147 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
1150 struct Scsi_Host *shost = rport_to_shost(rport);
1151 struct fc_internal *i = to_fc_internal(shost->transportt);
1153 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
1154 (rport->port_state == FC_PORTSTATE_DELETED) ||
1155 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
1158 * Check for overflow; dev_loss_tmo is u32
1164 * If fast_io_fail is off we have to cap
1165 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
1167 if (rport->fast_io_fail_tmo == -1 &&
1168 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
1171 i->f->set_rport_dev_loss_tmo(rport, val);
1175 fc_rport_show_function(dev_loss_tmo, "%u\n", 20, )
1177 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
1178 const char *buf, size_t count)
1180 struct fc_rport *rport = transport_class_to_rport(dev);
1184 rc = fc_str_to_dev_loss(buf, &val);
1188 rc = fc_rport_set_dev_loss_tmo(rport, val);
1193 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
1194 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
1197 /* Private Remote Port Attributes */
1199 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1200 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1201 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
1204 show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
1207 struct fc_rport *rport = transport_class_to_rport(dev);
1209 /* identify any roles that are port_id specific */
1210 if ((rport->port_id != -1) &&
1211 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
1212 FC_WELLKNOWN_PORTID_MASK) {
1213 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
1214 case FC_FPORT_PORTID:
1215 return snprintf(buf, 30, "Fabric Port\n");
1216 case FC_FABCTLR_PORTID:
1217 return snprintf(buf, 30, "Fabric Controller\n");
1218 case FC_DIRSRVR_PORTID:
1219 return snprintf(buf, 30, "Directory Server\n");
1220 case FC_TIMESRVR_PORTID:
1221 return snprintf(buf, 30, "Time Server\n");
1222 case FC_MGMTSRVR_PORTID:
1223 return snprintf(buf, 30, "Management Server\n");
1225 return snprintf(buf, 30, "Unknown Fabric Entity\n");
1228 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
1229 return snprintf(buf, 20, "unknown\n");
1230 return get_fc_port_roles_names(rport->roles, buf);
1233 static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
1234 show_fc_rport_roles, NULL);
1236 static ssize_t fc_rport_set_marginal_state(struct device *dev,
1237 struct device_attribute *attr,
1238 const char *buf, size_t count)
1240 struct fc_rport *rport = transport_class_to_rport(dev);
1241 enum fc_port_state port_state;
1244 ret = get_fc_port_state_match(buf, &port_state);
1247 if (port_state == FC_PORTSTATE_MARGINAL) {
1249 * Change the state to Marginal only if the
1250 * current rport state is Online
1251 * Allow only Online->Marginal
1253 if (rport->port_state == FC_PORTSTATE_ONLINE)
1254 rport->port_state = port_state;
1257 } else if (port_state == FC_PORTSTATE_ONLINE) {
1259 * Change the state to Online only if the
1260 * current rport state is Marginal
1261 * Allow only Marginal->Online
1263 if (rport->port_state == FC_PORTSTATE_MARGINAL)
1264 rport->port_state = port_state;
1273 show_fc_rport_port_state(struct device *dev,
1274 struct device_attribute *attr, char *buf)
1277 struct fc_rport *rport = transport_class_to_rport(dev);
1279 name = get_fc_port_state_name(rport->port_state);
1283 return snprintf(buf, 20, "%s\n", name);
1286 static FC_DEVICE_ATTR(rport, port_state, 0444 | 0200,
1287 show_fc_rport_port_state, fc_rport_set_marginal_state);
1289 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
1292 * fast_io_fail_tmo attribute
1295 show_fc_rport_fast_io_fail_tmo (struct device *dev,
1296 struct device_attribute *attr, char *buf)
1298 struct fc_rport *rport = transport_class_to_rport(dev);
1300 if (rport->fast_io_fail_tmo == -1)
1301 return snprintf(buf, 5, "off\n");
1302 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
1306 store_fc_rport_fast_io_fail_tmo(struct device *dev,
1307 struct device_attribute *attr, const char *buf,
1312 struct fc_rport *rport = transport_class_to_rport(dev);
1314 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
1315 (rport->port_state == FC_PORTSTATE_DELETED) ||
1316 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
1318 if (strncmp(buf, "off", 3) == 0)
1319 rport->fast_io_fail_tmo = -1;
1321 val = simple_strtoul(buf, &cp, 0);
1322 if ((*cp && (*cp != '\n')) || (val < 0))
1325 * Cap fast_io_fail by dev_loss_tmo or
1326 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
1328 if ((val >= rport->dev_loss_tmo) ||
1329 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
1332 rport->fast_io_fail_tmo = val;
1336 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
1337 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1339 #define fc_rport_fpin_statistic(name) \
1340 static ssize_t fc_rport_fpinstat_##name(struct device *cd, \
1341 struct device_attribute *attr, \
1344 struct fc_rport *rport = transport_class_to_rport(cd); \
1346 return snprintf(buf, 20, "0x%llx\n", rport->fpin_stats.name); \
1348 static FC_DEVICE_ATTR(rport, fpin_##name, 0444, fc_rport_fpinstat_##name, NULL)
1350 fc_rport_fpin_statistic(dn);
1351 fc_rport_fpin_statistic(dn_unknown);
1352 fc_rport_fpin_statistic(dn_timeout);
1353 fc_rport_fpin_statistic(dn_unable_to_route);
1354 fc_rport_fpin_statistic(dn_device_specific);
1355 fc_rport_fpin_statistic(cn);
1356 fc_rport_fpin_statistic(cn_clear);
1357 fc_rport_fpin_statistic(cn_lost_credit);
1358 fc_rport_fpin_statistic(cn_credit_stall);
1359 fc_rport_fpin_statistic(cn_oversubscription);
1360 fc_rport_fpin_statistic(cn_device_specific);
1361 fc_rport_fpin_statistic(li);
1362 fc_rport_fpin_statistic(li_failure_unknown);
1363 fc_rport_fpin_statistic(li_link_failure_count);
1364 fc_rport_fpin_statistic(li_loss_of_sync_count);
1365 fc_rport_fpin_statistic(li_loss_of_signals_count);
1366 fc_rport_fpin_statistic(li_prim_seq_err_count);
1367 fc_rport_fpin_statistic(li_invalid_tx_word_count);
1368 fc_rport_fpin_statistic(li_invalid_crc_count);
1369 fc_rport_fpin_statistic(li_device_specific);
1371 static struct attribute *fc_rport_statistics_attrs[] = {
1372 &device_attr_rport_fpin_dn.attr,
1373 &device_attr_rport_fpin_dn_unknown.attr,
1374 &device_attr_rport_fpin_dn_timeout.attr,
1375 &device_attr_rport_fpin_dn_unable_to_route.attr,
1376 &device_attr_rport_fpin_dn_device_specific.attr,
1377 &device_attr_rport_fpin_li.attr,
1378 &device_attr_rport_fpin_li_failure_unknown.attr,
1379 &device_attr_rport_fpin_li_link_failure_count.attr,
1380 &device_attr_rport_fpin_li_loss_of_sync_count.attr,
1381 &device_attr_rport_fpin_li_loss_of_signals_count.attr,
1382 &device_attr_rport_fpin_li_prim_seq_err_count.attr,
1383 &device_attr_rport_fpin_li_invalid_tx_word_count.attr,
1384 &device_attr_rport_fpin_li_invalid_crc_count.attr,
1385 &device_attr_rport_fpin_li_device_specific.attr,
1386 &device_attr_rport_fpin_cn.attr,
1387 &device_attr_rport_fpin_cn_clear.attr,
1388 &device_attr_rport_fpin_cn_lost_credit.attr,
1389 &device_attr_rport_fpin_cn_credit_stall.attr,
1390 &device_attr_rport_fpin_cn_oversubscription.attr,
1391 &device_attr_rport_fpin_cn_device_specific.attr,
1395 static struct attribute_group fc_rport_statistics_group = {
1396 .name = "statistics",
1397 .attrs = fc_rport_statistics_attrs,
1402 * FC SCSI Target Attribute Management
1406 * Note: in the target show function we recognize when the remote
1407 * port is in the hierarchy and do not allow the driver to get
1408 * involved in sysfs functions. The driver only gets involved if
1409 * it's the "old" style that doesn't use rports.
1411 #define fc_starget_show_function(field, format_string, sz, cast) \
1413 show_fc_starget_##field (struct device *dev, \
1414 struct device_attribute *attr, char *buf) \
1416 struct scsi_target *starget = transport_class_to_starget(dev); \
1417 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
1418 struct fc_internal *i = to_fc_internal(shost->transportt); \
1419 struct fc_rport *rport = starget_to_rport(starget); \
1421 fc_starget_##field(starget) = rport->field; \
1422 else if (i->f->get_starget_##field) \
1423 i->f->get_starget_##field(starget); \
1424 return snprintf(buf, sz, format_string, \
1425 cast fc_starget_##field(starget)); \
1428 #define fc_starget_rd_attr(field, format_string, sz) \
1429 fc_starget_show_function(field, format_string, sz, ) \
1430 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1431 show_fc_starget_##field, NULL)
1433 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
1434 fc_starget_show_function(field, format_string, sz, (cast)) \
1435 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1436 show_fc_starget_##field, NULL)
1438 #define SETUP_STARGET_ATTRIBUTE_RD(field) \
1439 i->private_starget_attrs[count] = device_attr_starget_##field; \
1440 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1441 i->private_starget_attrs[count].store = NULL; \
1442 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1443 if (i->f->show_starget_##field) \
1446 #define SETUP_STARGET_ATTRIBUTE_RW(field) \
1447 i->private_starget_attrs[count] = device_attr_starget_##field; \
1448 if (!i->f->set_starget_##field) { \
1449 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1450 i->private_starget_attrs[count].store = NULL; \
1452 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1453 if (i->f->show_starget_##field) \
1456 /* The FC Transport SCSI Target Attributes: */
1457 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1458 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1459 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1463 * FC Virtual Port Attribute Management
1466 #define fc_vport_show_function(field, format_string, sz, cast) \
1468 show_fc_vport_##field (struct device *dev, \
1469 struct device_attribute *attr, char *buf) \
1471 struct fc_vport *vport = transport_class_to_vport(dev); \
1472 struct Scsi_Host *shost = vport_to_shost(vport); \
1473 struct fc_internal *i = to_fc_internal(shost->transportt); \
1474 if ((i->f->get_vport_##field) && \
1475 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1476 i->f->get_vport_##field(vport); \
1477 return snprintf(buf, sz, format_string, cast vport->field); \
1480 #define fc_vport_store_function(field) \
1482 store_fc_vport_##field(struct device *dev, \
1483 struct device_attribute *attr, \
1484 const char *buf, size_t count) \
1487 struct fc_vport *vport = transport_class_to_vport(dev); \
1488 struct Scsi_Host *shost = vport_to_shost(vport); \
1489 struct fc_internal *i = to_fc_internal(shost->transportt); \
1491 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1493 val = simple_strtoul(buf, &cp, 0); \
1494 if (*cp && (*cp != '\n')) \
1496 i->f->set_vport_##field(vport, val); \
1500 #define fc_vport_store_str_function(field, slen) \
1502 store_fc_vport_##field(struct device *dev, \
1503 struct device_attribute *attr, \
1504 const char *buf, size_t count) \
1506 struct fc_vport *vport = transport_class_to_vport(dev); \
1507 struct Scsi_Host *shost = vport_to_shost(vport); \
1508 struct fc_internal *i = to_fc_internal(shost->transportt); \
1509 unsigned int cnt=count; \
1511 /* count may include a LF at end of string */ \
1512 if (buf[cnt-1] == '\n') \
1514 if (cnt > ((slen) - 1)) \
1516 memcpy(vport->field, buf, cnt); \
1517 i->f->set_vport_##field(vport); \
1521 #define fc_vport_rd_attr(field, format_string, sz) \
1522 fc_vport_show_function(field, format_string, sz, ) \
1523 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1524 show_fc_vport_##field, NULL)
1526 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1527 fc_vport_show_function(field, format_string, sz, (cast)) \
1528 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1529 show_fc_vport_##field, NULL)
1531 #define fc_vport_rw_attr(field, format_string, sz) \
1532 fc_vport_show_function(field, format_string, sz, ) \
1533 fc_vport_store_function(field) \
1534 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1535 show_fc_vport_##field, \
1536 store_fc_vport_##field)
1538 #define fc_private_vport_show_function(field, format_string, sz, cast) \
1540 show_fc_vport_##field (struct device *dev, \
1541 struct device_attribute *attr, char *buf) \
1543 struct fc_vport *vport = transport_class_to_vport(dev); \
1544 return snprintf(buf, sz, format_string, cast vport->field); \
1547 #define fc_private_vport_store_u32_function(field) \
1549 store_fc_vport_##field(struct device *dev, \
1550 struct device_attribute *attr, \
1551 const char *buf, size_t count) \
1554 struct fc_vport *vport = transport_class_to_vport(dev); \
1556 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1558 val = simple_strtoul(buf, &cp, 0); \
1559 if (*cp && (*cp != '\n')) \
1561 vport->field = val; \
1566 #define fc_private_vport_rd_attr(field, format_string, sz) \
1567 fc_private_vport_show_function(field, format_string, sz, ) \
1568 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1569 show_fc_vport_##field, NULL)
1571 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1572 fc_private_vport_show_function(field, format_string, sz, (cast)) \
1573 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1574 show_fc_vport_##field, NULL)
1576 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1577 fc_private_vport_show_function(field, format_string, sz, ) \
1578 fc_private_vport_store_u32_function(field) \
1579 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1580 show_fc_vport_##field, \
1581 store_fc_vport_##field)
1584 #define fc_private_vport_rd_enum_attr(title, maxlen) \
1586 show_fc_vport_##title (struct device *dev, \
1587 struct device_attribute *attr, \
1590 struct fc_vport *vport = transport_class_to_vport(dev); \
1592 name = get_fc_##title##_name(vport->title); \
1595 return snprintf(buf, maxlen, "%s\n", name); \
1597 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
1598 show_fc_vport_##title, NULL)
1601 #define SETUP_VPORT_ATTRIBUTE_RD(field) \
1602 i->private_vport_attrs[count] = device_attr_vport_##field; \
1603 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1604 i->private_vport_attrs[count].store = NULL; \
1605 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1606 if (i->f->get_##field) \
1608 /* NOTE: Above MACRO differs: checks function not show bit */
1610 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
1611 i->private_vport_attrs[count] = device_attr_vport_##field; \
1612 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1613 i->private_vport_attrs[count].store = NULL; \
1614 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1617 #define SETUP_VPORT_ATTRIBUTE_WR(field) \
1618 i->private_vport_attrs[count] = device_attr_vport_##field; \
1619 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1622 /* NOTE: Above MACRO differs: checks function */
1624 #define SETUP_VPORT_ATTRIBUTE_RW(field) \
1625 i->private_vport_attrs[count] = device_attr_vport_##field; \
1626 if (!i->f->set_vport_##field) { \
1627 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1628 i->private_vport_attrs[count].store = NULL; \
1630 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1632 /* NOTE: Above MACRO differs: does not check show bit */
1634 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1636 i->private_vport_attrs[count] = device_attr_vport_##field; \
1637 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1642 /* The FC Transport Virtual Port Attributes: */
1644 /* Fixed Virtual Port Attributes */
1646 /* Dynamic Virtual Port Attributes */
1648 /* Private Virtual Port Attributes */
1650 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1651 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1652 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1653 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1656 show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1659 struct fc_vport *vport = transport_class_to_vport(dev);
1661 if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1662 return snprintf(buf, 20, "unknown\n");
1663 return get_fc_port_roles_names(vport->roles, buf);
1665 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1667 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1669 fc_private_vport_show_function(symbolic_name, "%s\n",
1670 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1671 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1672 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1673 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1676 store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1677 const char *buf, size_t count)
1679 struct fc_vport *vport = transport_class_to_vport(dev);
1680 struct Scsi_Host *shost = vport_to_shost(vport);
1681 unsigned long flags;
1683 spin_lock_irqsave(shost->host_lock, flags);
1684 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
1685 spin_unlock_irqrestore(shost->host_lock, flags);
1688 vport->flags |= FC_VPORT_DELETING;
1689 spin_unlock_irqrestore(shost->host_lock, flags);
1691 fc_queue_work(shost, &vport->vport_delete_work);
1694 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1695 NULL, store_fc_vport_delete);
1699 * Enable/Disable vport
1700 * Write "1" to disable, write "0" to enable
1703 store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1707 struct fc_vport *vport = transport_class_to_vport(dev);
1708 struct Scsi_Host *shost = vport_to_shost(vport);
1709 struct fc_internal *i = to_fc_internal(shost->transportt);
1712 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1716 if (vport->vport_state != FC_VPORT_DISABLED)
1718 } else if (*buf == '1') {
1719 if (vport->vport_state == FC_VPORT_DISABLED)
1724 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1725 return stat ? stat : count;
1727 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1728 NULL, store_fc_vport_disable);
1732 * Host Attribute Management
1735 #define fc_host_show_function(field, format_string, sz, cast) \
1737 show_fc_host_##field (struct device *dev, \
1738 struct device_attribute *attr, char *buf) \
1740 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1741 struct fc_internal *i = to_fc_internal(shost->transportt); \
1742 if (i->f->get_host_##field) \
1743 i->f->get_host_##field(shost); \
1744 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1747 #define fc_host_store_function(field) \
1749 store_fc_host_##field(struct device *dev, \
1750 struct device_attribute *attr, \
1751 const char *buf, size_t count) \
1754 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1755 struct fc_internal *i = to_fc_internal(shost->transportt); \
1758 val = simple_strtoul(buf, &cp, 0); \
1759 if (*cp && (*cp != '\n')) \
1761 i->f->set_host_##field(shost, val); \
1765 #define fc_host_store_str_function(field, slen) \
1767 store_fc_host_##field(struct device *dev, \
1768 struct device_attribute *attr, \
1769 const char *buf, size_t count) \
1771 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1772 struct fc_internal *i = to_fc_internal(shost->transportt); \
1773 unsigned int cnt=count; \
1775 /* count may include a LF at end of string */ \
1776 if (buf[cnt-1] == '\n') \
1778 if (cnt > ((slen) - 1)) \
1780 memcpy(fc_host_##field(shost), buf, cnt); \
1781 i->f->set_host_##field(shost); \
1785 #define fc_host_rd_attr(field, format_string, sz) \
1786 fc_host_show_function(field, format_string, sz, ) \
1787 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1788 show_fc_host_##field, NULL)
1790 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1791 fc_host_show_function(field, format_string, sz, (cast)) \
1792 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1793 show_fc_host_##field, NULL)
1795 #define fc_host_rw_attr(field, format_string, sz) \
1796 fc_host_show_function(field, format_string, sz, ) \
1797 fc_host_store_function(field) \
1798 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1799 show_fc_host_##field, \
1800 store_fc_host_##field)
1802 #define fc_host_rd_enum_attr(title, maxlen) \
1804 show_fc_host_##title (struct device *dev, \
1805 struct device_attribute *attr, char *buf) \
1807 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1808 struct fc_internal *i = to_fc_internal(shost->transportt); \
1810 if (i->f->get_host_##title) \
1811 i->f->get_host_##title(shost); \
1812 name = get_fc_##title##_name(fc_host_##title(shost)); \
1815 return snprintf(buf, maxlen, "%s\n", name); \
1817 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1819 #define SETUP_HOST_ATTRIBUTE_RD(field) \
1820 i->private_host_attrs[count] = device_attr_host_##field; \
1821 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1822 i->private_host_attrs[count].store = NULL; \
1823 i->host_attrs[count] = &i->private_host_attrs[count]; \
1824 if (i->f->show_host_##field) \
1827 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
1828 i->private_host_attrs[count] = device_attr_host_##field; \
1829 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1830 i->private_host_attrs[count].store = NULL; \
1831 i->host_attrs[count] = &i->private_host_attrs[count]; \
1834 #define SETUP_HOST_ATTRIBUTE_RW(field) \
1835 i->private_host_attrs[count] = device_attr_host_##field; \
1836 if (!i->f->set_host_##field) { \
1837 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1838 i->private_host_attrs[count].store = NULL; \
1840 i->host_attrs[count] = &i->private_host_attrs[count]; \
1841 if (i->f->show_host_##field) \
1845 #define fc_private_host_show_function(field, format_string, sz, cast) \
1847 show_fc_host_##field (struct device *dev, \
1848 struct device_attribute *attr, char *buf) \
1850 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1851 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1854 #define fc_private_host_rd_attr(field, format_string, sz) \
1855 fc_private_host_show_function(field, format_string, sz, ) \
1856 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1857 show_fc_host_##field, NULL)
1859 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1860 fc_private_host_show_function(field, format_string, sz, (cast)) \
1861 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1862 show_fc_host_##field, NULL)
1864 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
1865 i->private_host_attrs[count] = device_attr_host_##field; \
1866 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1867 i->private_host_attrs[count].store = NULL; \
1868 i->host_attrs[count] = &i->private_host_attrs[count]; \
1871 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
1873 i->private_host_attrs[count] = device_attr_host_##field; \
1874 i->host_attrs[count] = &i->private_host_attrs[count]; \
1879 /* Fixed Host Attributes */
1882 show_fc_host_supported_classes (struct device *dev,
1883 struct device_attribute *attr, char *buf)
1885 struct Scsi_Host *shost = transport_class_to_shost(dev);
1887 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1888 return snprintf(buf, 20, "unspecified\n");
1890 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1892 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1893 show_fc_host_supported_classes, NULL);
1896 show_fc_host_supported_fc4s (struct device *dev,
1897 struct device_attribute *attr, char *buf)
1899 struct Scsi_Host *shost = transport_class_to_shost(dev);
1900 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1902 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1903 show_fc_host_supported_fc4s, NULL);
1906 show_fc_host_supported_speeds (struct device *dev,
1907 struct device_attribute *attr, char *buf)
1909 struct Scsi_Host *shost = transport_class_to_shost(dev);
1911 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1912 return snprintf(buf, 20, "unknown\n");
1914 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1916 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1917 show_fc_host_supported_speeds, NULL);
1920 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1921 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1922 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1923 unsigned long long);
1924 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1925 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1926 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1927 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1928 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1929 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1930 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1931 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1932 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1933 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1936 /* Dynamic Host Attributes */
1939 show_fc_host_active_fc4s (struct device *dev,
1940 struct device_attribute *attr, char *buf)
1942 struct Scsi_Host *shost = transport_class_to_shost(dev);
1943 struct fc_internal *i = to_fc_internal(shost->transportt);
1945 if (i->f->get_host_active_fc4s)
1946 i->f->get_host_active_fc4s(shost);
1948 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1950 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1951 show_fc_host_active_fc4s, NULL);
1954 show_fc_host_speed (struct device *dev,
1955 struct device_attribute *attr, char *buf)
1957 struct Scsi_Host *shost = transport_class_to_shost(dev);
1958 struct fc_internal *i = to_fc_internal(shost->transportt);
1960 if (i->f->get_host_speed)
1961 i->f->get_host_speed(shost);
1963 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1964 return snprintf(buf, 20, "unknown\n");
1966 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1968 static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1969 show_fc_host_speed, NULL);
1972 fc_host_rd_attr(port_id, "0x%06x\n", 20);
1973 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1974 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1975 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
1976 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1978 fc_private_host_show_function(system_hostname, "%s\n",
1979 FC_SYMBOLIC_NAME_SIZE + 1, )
1980 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1981 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1982 show_fc_host_system_hostname, store_fc_host_system_hostname);
1985 /* Private Host Attributes */
1988 show_fc_private_host_tgtid_bind_type(struct device *dev,
1989 struct device_attribute *attr, char *buf)
1991 struct Scsi_Host *shost = transport_class_to_shost(dev);
1994 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1997 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
2000 #define get_list_head_entry(pos, head, member) \
2001 pos = list_entry((head)->next, typeof(*pos), member)
2004 store_fc_private_host_tgtid_bind_type(struct device *dev,
2005 struct device_attribute *attr, const char *buf, size_t count)
2007 struct Scsi_Host *shost = transport_class_to_shost(dev);
2008 struct fc_rport *rport;
2009 enum fc_tgtid_binding_type val;
2010 unsigned long flags;
2012 if (get_fc_tgtid_bind_type_match(buf, &val))
2015 /* if changing bind type, purge all unused consistent bindings */
2016 if (val != fc_host_tgtid_bind_type(shost)) {
2017 spin_lock_irqsave(shost->host_lock, flags);
2018 while (!list_empty(&fc_host_rport_bindings(shost))) {
2019 get_list_head_entry(rport,
2020 &fc_host_rport_bindings(shost), peers);
2021 list_del(&rport->peers);
2022 rport->port_state = FC_PORTSTATE_DELETED;
2023 fc_queue_work(shost, &rport->rport_delete_work);
2025 spin_unlock_irqrestore(shost->host_lock, flags);
2028 fc_host_tgtid_bind_type(shost) = val;
2032 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
2033 show_fc_private_host_tgtid_bind_type,
2034 store_fc_private_host_tgtid_bind_type);
2037 store_fc_private_host_issue_lip(struct device *dev,
2038 struct device_attribute *attr, const char *buf, size_t count)
2040 struct Scsi_Host *shost = transport_class_to_shost(dev);
2041 struct fc_internal *i = to_fc_internal(shost->transportt);
2044 /* ignore any data value written to the attribute */
2045 if (i->f->issue_fc_host_lip) {
2046 ret = i->f->issue_fc_host_lip(shost);
2047 return ret ? ret: count;
2053 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
2054 store_fc_private_host_issue_lip);
2057 store_fc_private_host_dev_loss_tmo(struct device *dev,
2058 struct device_attribute *attr,
2059 const char *buf, size_t count)
2061 struct Scsi_Host *shost = transport_class_to_shost(dev);
2062 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2063 struct fc_rport *rport;
2064 unsigned long val, flags;
2067 rc = fc_str_to_dev_loss(buf, &val);
2071 fc_host_dev_loss_tmo(shost) = val;
2072 spin_lock_irqsave(shost->host_lock, flags);
2073 list_for_each_entry(rport, &fc_host->rports, peers)
2074 fc_rport_set_dev_loss_tmo(rport, val);
2075 spin_unlock_irqrestore(shost->host_lock, flags);
2079 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
2080 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
2081 show_fc_host_dev_loss_tmo,
2082 store_fc_private_host_dev_loss_tmo);
2084 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
2087 * Host Statistics Management
2090 /* Show a given attribute in the statistics group */
2092 fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
2094 struct Scsi_Host *shost = transport_class_to_shost(dev);
2095 struct fc_internal *i = to_fc_internal(shost->transportt);
2096 struct fc_host_statistics *stats;
2097 ssize_t ret = -ENOENT;
2099 if (offset > sizeof(struct fc_host_statistics) ||
2100 offset % sizeof(u64) != 0)
2103 if (i->f->get_fc_host_stats) {
2104 stats = (i->f->get_fc_host_stats)(shost);
2106 ret = snprintf(buf, 20, "0x%llx\n",
2107 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
2113 /* generate a read-only statistics attribute */
2114 #define fc_host_statistic(name) \
2115 static ssize_t show_fcstat_##name(struct device *cd, \
2116 struct device_attribute *attr, \
2119 return fc_stat_show(cd, buf, \
2120 offsetof(struct fc_host_statistics, name)); \
2122 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
2124 fc_host_statistic(seconds_since_last_reset);
2125 fc_host_statistic(tx_frames);
2126 fc_host_statistic(tx_words);
2127 fc_host_statistic(rx_frames);
2128 fc_host_statistic(rx_words);
2129 fc_host_statistic(lip_count);
2130 fc_host_statistic(nos_count);
2131 fc_host_statistic(error_frames);
2132 fc_host_statistic(dumped_frames);
2133 fc_host_statistic(link_failure_count);
2134 fc_host_statistic(loss_of_sync_count);
2135 fc_host_statistic(loss_of_signal_count);
2136 fc_host_statistic(prim_seq_protocol_err_count);
2137 fc_host_statistic(invalid_tx_word_count);
2138 fc_host_statistic(invalid_crc_count);
2139 fc_host_statistic(fcp_input_requests);
2140 fc_host_statistic(fcp_output_requests);
2141 fc_host_statistic(fcp_control_requests);
2142 fc_host_statistic(fcp_input_megabytes);
2143 fc_host_statistic(fcp_output_megabytes);
2144 fc_host_statistic(fcp_packet_alloc_failures);
2145 fc_host_statistic(fcp_packet_aborts);
2146 fc_host_statistic(fcp_frame_alloc_failures);
2147 fc_host_statistic(fc_no_free_exch);
2148 fc_host_statistic(fc_no_free_exch_xid);
2149 fc_host_statistic(fc_xid_not_found);
2150 fc_host_statistic(fc_xid_busy);
2151 fc_host_statistic(fc_seq_not_found);
2152 fc_host_statistic(fc_non_bls_resp);
2153 fc_host_statistic(cn_sig_warn);
2154 fc_host_statistic(cn_sig_alarm);
2157 #define fc_host_fpin_statistic(name) \
2158 static ssize_t fc_host_fpinstat_##name(struct device *cd, \
2159 struct device_attribute *attr, \
2162 struct Scsi_Host *shost = transport_class_to_shost(cd); \
2163 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); \
2165 return snprintf(buf, 20, "0x%llx\n", fc_host->fpin_stats.name); \
2167 static FC_DEVICE_ATTR(host, fpin_##name, 0444, fc_host_fpinstat_##name, NULL)
2169 fc_host_fpin_statistic(dn);
2170 fc_host_fpin_statistic(dn_unknown);
2171 fc_host_fpin_statistic(dn_timeout);
2172 fc_host_fpin_statistic(dn_unable_to_route);
2173 fc_host_fpin_statistic(dn_device_specific);
2174 fc_host_fpin_statistic(cn);
2175 fc_host_fpin_statistic(cn_clear);
2176 fc_host_fpin_statistic(cn_lost_credit);
2177 fc_host_fpin_statistic(cn_credit_stall);
2178 fc_host_fpin_statistic(cn_oversubscription);
2179 fc_host_fpin_statistic(cn_device_specific);
2180 fc_host_fpin_statistic(li);
2181 fc_host_fpin_statistic(li_failure_unknown);
2182 fc_host_fpin_statistic(li_link_failure_count);
2183 fc_host_fpin_statistic(li_loss_of_sync_count);
2184 fc_host_fpin_statistic(li_loss_of_signals_count);
2185 fc_host_fpin_statistic(li_prim_seq_err_count);
2186 fc_host_fpin_statistic(li_invalid_tx_word_count);
2187 fc_host_fpin_statistic(li_invalid_crc_count);
2188 fc_host_fpin_statistic(li_device_specific);
2191 fc_reset_statistics(struct device *dev, struct device_attribute *attr,
2192 const char *buf, size_t count)
2194 struct Scsi_Host *shost = transport_class_to_shost(dev);
2195 struct fc_internal *i = to_fc_internal(shost->transportt);
2197 /* ignore any data value written to the attribute */
2198 if (i->f->reset_fc_host_stats) {
2199 i->f->reset_fc_host_stats(shost);
2205 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
2206 fc_reset_statistics);
2208 static struct attribute *fc_statistics_attrs[] = {
2209 &device_attr_host_seconds_since_last_reset.attr,
2210 &device_attr_host_tx_frames.attr,
2211 &device_attr_host_tx_words.attr,
2212 &device_attr_host_rx_frames.attr,
2213 &device_attr_host_rx_words.attr,
2214 &device_attr_host_lip_count.attr,
2215 &device_attr_host_nos_count.attr,
2216 &device_attr_host_error_frames.attr,
2217 &device_attr_host_dumped_frames.attr,
2218 &device_attr_host_link_failure_count.attr,
2219 &device_attr_host_loss_of_sync_count.attr,
2220 &device_attr_host_loss_of_signal_count.attr,
2221 &device_attr_host_prim_seq_protocol_err_count.attr,
2222 &device_attr_host_invalid_tx_word_count.attr,
2223 &device_attr_host_invalid_crc_count.attr,
2224 &device_attr_host_fcp_input_requests.attr,
2225 &device_attr_host_fcp_output_requests.attr,
2226 &device_attr_host_fcp_control_requests.attr,
2227 &device_attr_host_fcp_input_megabytes.attr,
2228 &device_attr_host_fcp_output_megabytes.attr,
2229 &device_attr_host_fcp_packet_alloc_failures.attr,
2230 &device_attr_host_fcp_packet_aborts.attr,
2231 &device_attr_host_fcp_frame_alloc_failures.attr,
2232 &device_attr_host_fc_no_free_exch.attr,
2233 &device_attr_host_fc_no_free_exch_xid.attr,
2234 &device_attr_host_fc_xid_not_found.attr,
2235 &device_attr_host_fc_xid_busy.attr,
2236 &device_attr_host_fc_seq_not_found.attr,
2237 &device_attr_host_fc_non_bls_resp.attr,
2238 &device_attr_host_cn_sig_warn.attr,
2239 &device_attr_host_cn_sig_alarm.attr,
2240 &device_attr_host_reset_statistics.attr,
2241 &device_attr_host_fpin_dn.attr,
2242 &device_attr_host_fpin_dn_unknown.attr,
2243 &device_attr_host_fpin_dn_timeout.attr,
2244 &device_attr_host_fpin_dn_unable_to_route.attr,
2245 &device_attr_host_fpin_dn_device_specific.attr,
2246 &device_attr_host_fpin_li.attr,
2247 &device_attr_host_fpin_li_failure_unknown.attr,
2248 &device_attr_host_fpin_li_link_failure_count.attr,
2249 &device_attr_host_fpin_li_loss_of_sync_count.attr,
2250 &device_attr_host_fpin_li_loss_of_signals_count.attr,
2251 &device_attr_host_fpin_li_prim_seq_err_count.attr,
2252 &device_attr_host_fpin_li_invalid_tx_word_count.attr,
2253 &device_attr_host_fpin_li_invalid_crc_count.attr,
2254 &device_attr_host_fpin_li_device_specific.attr,
2255 &device_attr_host_fpin_cn.attr,
2256 &device_attr_host_fpin_cn_clear.attr,
2257 &device_attr_host_fpin_cn_lost_credit.attr,
2258 &device_attr_host_fpin_cn_credit_stall.attr,
2259 &device_attr_host_fpin_cn_oversubscription.attr,
2260 &device_attr_host_fpin_cn_device_specific.attr,
2264 static struct attribute_group fc_statistics_group = {
2265 .name = "statistics",
2266 .attrs = fc_statistics_attrs,
2270 /* Host Vport Attributes */
2273 fc_parse_wwn(const char *ns, u64 *nm)
2278 memset(wwn, 0, sizeof(wwn));
2280 /* Validate and store the new name */
2281 for (i=0, j=0; i < 16; i++) {
2284 value = hex_to_bin(*ns++);
2286 j = (j << 4) | value;
2290 wwn[i/2] = j & 0xff;
2295 *nm = wwn_to_u64(wwn);
2302 * "Short-cut" sysfs variable to create a new vport on a FC Host.
2303 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
2304 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
2305 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
2308 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
2309 const char *buf, size_t count)
2311 struct Scsi_Host *shost = transport_class_to_shost(dev);
2312 struct fc_vport_identifiers vid;
2313 struct fc_vport *vport;
2314 unsigned int cnt=count;
2317 memset(&vid, 0, sizeof(vid));
2319 /* count may include a LF at end of string */
2320 if (buf[cnt-1] == '\n')
2323 /* validate we have enough characters for WWPN */
2324 if ((cnt != (16+1+16)) || (buf[16] != ':'))
2327 stat = fc_parse_wwn(&buf[0], &vid.port_name);
2331 stat = fc_parse_wwn(&buf[17], &vid.node_name);
2335 vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
2336 vid.vport_type = FC_PORTTYPE_NPIV;
2337 /* vid.symbolic_name is already zero/NULL's */
2338 vid.disable = false; /* always enabled */
2340 /* we only allow support on Channel 0 !!! */
2341 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
2342 return stat ? stat : count;
2344 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
2345 store_fc_host_vport_create);
2349 * "Short-cut" sysfs variable to delete a vport on a FC Host.
2350 * Vport is identified by a string containing "<WWPN>:<WWNN>".
2351 * The WWNs are specified as hex characters, and may *not* contain
2352 * any prefixes (e.g. 0x, x, etc)
2355 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
2356 const char *buf, size_t count)
2358 struct Scsi_Host *shost = transport_class_to_shost(dev);
2359 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2360 struct fc_vport *vport;
2362 unsigned long flags;
2363 unsigned int cnt=count;
2366 /* count may include a LF at end of string */
2367 if (buf[cnt-1] == '\n')
2370 /* validate we have enough characters for WWPN */
2371 if ((cnt != (16+1+16)) || (buf[16] != ':'))
2374 stat = fc_parse_wwn(&buf[0], &wwpn);
2378 stat = fc_parse_wwn(&buf[17], &wwnn);
2382 spin_lock_irqsave(shost->host_lock, flags);
2384 /* we only allow support on Channel 0 !!! */
2385 list_for_each_entry(vport, &fc_host->vports, peers) {
2386 if ((vport->channel == 0) &&
2387 (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
2388 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
2390 vport->flags |= FC_VPORT_DELETING;
2395 spin_unlock_irqrestore(shost->host_lock, flags);
2400 stat = fc_vport_terminate(vport);
2401 return stat ? stat : count;
2403 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
2404 store_fc_host_vport_delete);
2407 static int fc_host_match(struct attribute_container *cont,
2410 struct Scsi_Host *shost;
2411 struct fc_internal *i;
2413 if (!scsi_is_host_device(dev))
2416 shost = dev_to_shost(dev);
2417 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2418 != &fc_host_class.class)
2421 i = to_fc_internal(shost->transportt);
2423 return &i->t.host_attrs.ac == cont;
2426 static int fc_target_match(struct attribute_container *cont,
2429 struct Scsi_Host *shost;
2430 struct fc_internal *i;
2432 if (!scsi_is_target_device(dev))
2435 shost = dev_to_shost(dev->parent);
2436 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2437 != &fc_host_class.class)
2440 i = to_fc_internal(shost->transportt);
2442 return &i->t.target_attrs.ac == cont;
2445 static void fc_rport_dev_release(struct device *dev)
2447 struct fc_rport *rport = dev_to_rport(dev);
2448 put_device(dev->parent);
2452 int scsi_is_fc_rport(const struct device *dev)
2454 return dev->release == fc_rport_dev_release;
2456 EXPORT_SYMBOL(scsi_is_fc_rport);
2458 static int fc_rport_match(struct attribute_container *cont,
2461 struct Scsi_Host *shost;
2462 struct fc_internal *i;
2464 if (!scsi_is_fc_rport(dev))
2467 shost = dev_to_shost(dev->parent);
2468 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2469 != &fc_host_class.class)
2472 i = to_fc_internal(shost->transportt);
2474 return &i->rport_attr_cont.ac == cont;
2478 static void fc_vport_dev_release(struct device *dev)
2480 struct fc_vport *vport = dev_to_vport(dev);
2481 put_device(dev->parent); /* release kobj parent */
2485 static int scsi_is_fc_vport(const struct device *dev)
2487 return dev->release == fc_vport_dev_release;
2490 static int fc_vport_match(struct attribute_container *cont,
2493 struct fc_vport *vport;
2494 struct Scsi_Host *shost;
2495 struct fc_internal *i;
2497 if (!scsi_is_fc_vport(dev))
2499 vport = dev_to_vport(dev);
2501 shost = vport_to_shost(vport);
2502 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2503 != &fc_host_class.class)
2506 i = to_fc_internal(shost->transportt);
2507 return &i->vport_attr_cont.ac == cont;
2512 * fc_eh_timed_out - FC Transport I/O timeout intercept handler
2513 * @scmd: The SCSI command which timed out
2515 * This routine protects against error handlers getting invoked while a
2516 * rport is in a blocked state, typically due to a temporarily loss of
2517 * connectivity. If the error handlers are allowed to proceed, requests
2518 * to abort i/o, reset the target, etc will likely fail as there is no way
2519 * to communicate with the device to perform the requested function. These
2520 * failures may result in the midlayer taking the device offline, requiring
2521 * manual intervention to restore operation.
2523 * This routine, called whenever an i/o times out, validates the state of
2524 * the underlying rport. If the rport is blocked, it returns
2525 * EH_RESET_TIMER, which will continue to reschedule the timeout.
2526 * Eventually, either the device will return, or devloss_tmo will fire,
2527 * and when the timeout then fires, it will be handled normally.
2528 * If the rport is not blocked, normal error handling continues.
2531 * This routine assumes no locks are held on entry.
2533 enum blk_eh_timer_return
2534 fc_eh_timed_out(struct scsi_cmnd *scmd)
2536 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2538 if (rport->port_state == FC_PORTSTATE_BLOCKED)
2539 return BLK_EH_RESET_TIMER;
2543 EXPORT_SYMBOL(fc_eh_timed_out);
2546 * Called by fc_user_scan to locate an rport on the shost that
2547 * matches the channel and target id, and invoke scsi_scan_target()
2551 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2553 struct fc_rport *rport;
2554 unsigned long flags;
2556 spin_lock_irqsave(shost->host_lock, flags);
2558 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2559 if (rport->scsi_target_id == -1)
2562 if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
2563 (rport->port_state != FC_PORTSTATE_MARGINAL))
2566 if ((channel == rport->channel) &&
2567 (id == rport->scsi_target_id)) {
2568 spin_unlock_irqrestore(shost->host_lock, flags);
2569 scsi_scan_target(&rport->dev, channel, id, lun,
2575 spin_unlock_irqrestore(shost->host_lock, flags);
2579 * Called via sysfs scan routines. Necessary, as the FC transport
2580 * wants to place all target objects below the rport object. So this
2581 * routine must invoke the scsi_scan_target() routine with the rport
2582 * object as the parent.
2585 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2590 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2591 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2592 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2595 if (channel == SCAN_WILD_CARD) {
2597 chhi = shost->max_channel + 1;
2603 if (id == SCAN_WILD_CARD) {
2605 tgthi = shost->max_id;
2611 for ( ; chlo < chhi; chlo++)
2612 for ( ; tgtlo < tgthi; tgtlo++)
2613 fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2618 struct scsi_transport_template *
2619 fc_attach_transport(struct fc_function_template *ft)
2622 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2628 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2629 i->t.target_attrs.ac.class = &fc_transport_class.class;
2630 i->t.target_attrs.ac.match = fc_target_match;
2631 i->t.target_size = sizeof(struct fc_starget_attrs);
2632 transport_container_register(&i->t.target_attrs);
2634 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2635 i->t.host_attrs.ac.class = &fc_host_class.class;
2636 i->t.host_attrs.ac.match = fc_host_match;
2637 i->t.host_size = sizeof(struct fc_host_attrs);
2638 if (ft->get_fc_host_stats)
2639 i->t.host_attrs.statistics = &fc_statistics_group;
2640 transport_container_register(&i->t.host_attrs);
2642 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2643 i->rport_attr_cont.ac.class = &fc_rport_class.class;
2644 i->rport_attr_cont.ac.match = fc_rport_match;
2645 i->rport_attr_cont.statistics = &fc_rport_statistics_group;
2646 transport_container_register(&i->rport_attr_cont);
2648 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2649 i->vport_attr_cont.ac.class = &fc_vport_class.class;
2650 i->vport_attr_cont.ac.match = fc_vport_match;
2651 transport_container_register(&i->vport_attr_cont);
2655 /* Transport uses the shost workq for scsi scanning */
2656 i->t.create_work_queue = 1;
2658 i->t.user_scan = fc_user_scan;
2661 * Setup SCSI Target Attributes.
2664 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2665 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2666 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2668 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2670 i->starget_attrs[count] = NULL;
2674 * Setup SCSI Host Attributes.
2677 SETUP_HOST_ATTRIBUTE_RD(node_name);
2678 SETUP_HOST_ATTRIBUTE_RD(port_name);
2679 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
2680 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2681 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
2682 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2683 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
2684 if (ft->vport_create) {
2685 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2686 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2688 SETUP_HOST_ATTRIBUTE_RD(serial_number);
2689 SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2690 SETUP_HOST_ATTRIBUTE_RD(model);
2691 SETUP_HOST_ATTRIBUTE_RD(model_description);
2692 SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2693 SETUP_HOST_ATTRIBUTE_RD(driver_version);
2694 SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2695 SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
2697 SETUP_HOST_ATTRIBUTE_RD(port_id);
2698 SETUP_HOST_ATTRIBUTE_RD(port_type);
2699 SETUP_HOST_ATTRIBUTE_RD(port_state);
2700 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2701 SETUP_HOST_ATTRIBUTE_RD(speed);
2702 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
2703 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
2704 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
2706 /* Transport-managed attributes */
2707 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
2708 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
2709 if (ft->issue_fc_host_lip)
2710 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
2711 if (ft->vport_create)
2712 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2713 if (ft->vport_delete)
2714 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
2716 BUG_ON(count > FC_HOST_NUM_ATTRS);
2718 i->host_attrs[count] = NULL;
2721 * Setup Remote Port Attributes.
2724 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2725 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2726 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2727 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2728 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2729 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2730 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2731 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(port_state);
2732 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
2733 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
2735 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2737 i->rport_attrs[count] = NULL;
2740 * Setup Virtual Port Attributes.
2743 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2744 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2745 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2746 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2747 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2748 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2749 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2750 SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2751 SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2753 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2755 i->vport_attrs[count] = NULL;
2759 EXPORT_SYMBOL(fc_attach_transport);
2761 void fc_release_transport(struct scsi_transport_template *t)
2763 struct fc_internal *i = to_fc_internal(t);
2765 transport_container_unregister(&i->t.target_attrs);
2766 transport_container_unregister(&i->t.host_attrs);
2767 transport_container_unregister(&i->rport_attr_cont);
2768 transport_container_unregister(&i->vport_attr_cont);
2772 EXPORT_SYMBOL(fc_release_transport);
2775 * fc_queue_work - Queue work to the fc_host workqueue.
2776 * @shost: Pointer to Scsi_Host bound to fc_host.
2777 * @work: Work to queue for execution.
2780 * 1 - work queued for execution
2781 * 0 - work is already queued
2782 * -EINVAL - work queue doesn't exist
2785 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2787 if (unlikely(!fc_host_work_q(shost))) {
2789 "ERROR: FC host '%s' attempted to queue work, "
2790 "when no workqueue created.\n", shost->hostt->name);
2796 return queue_work(fc_host_work_q(shost), work);
2800 * fc_flush_work - Flush a fc_host's workqueue.
2801 * @shost: Pointer to Scsi_Host bound to fc_host.
2804 fc_flush_work(struct Scsi_Host *shost)
2806 if (!fc_host_work_q(shost)) {
2808 "ERROR: FC host '%s' attempted to flush work, "
2809 "when no workqueue created.\n", shost->hostt->name);
2814 flush_workqueue(fc_host_work_q(shost));
2818 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2819 * @shost: Pointer to Scsi_Host bound to fc_host.
2820 * @work: Work to queue for execution.
2821 * @delay: jiffies to delay the work queuing
2824 * 1 on success / 0 already queued / < 0 for error
2827 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2828 unsigned long delay)
2830 if (unlikely(!fc_host_devloss_work_q(shost))) {
2832 "ERROR: FC host '%s' attempted to queue work, "
2833 "when no workqueue created.\n", shost->hostt->name);
2839 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2843 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2844 * @shost: Pointer to Scsi_Host bound to fc_host.
2847 fc_flush_devloss(struct Scsi_Host *shost)
2849 if (!fc_host_devloss_work_q(shost)) {
2851 "ERROR: FC host '%s' attempted to flush work, "
2852 "when no workqueue created.\n", shost->hostt->name);
2857 flush_workqueue(fc_host_devloss_work_q(shost));
2862 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2863 * @shost: Which &Scsi_Host
2865 * This routine is expected to be called immediately preceding the
2866 * a driver's call to scsi_remove_host().
2868 * WARNING: A driver utilizing the fc_transport, which fails to call
2869 * this routine prior to scsi_remove_host(), will leave dangling
2870 * objects in /sys/class/fc_remote_ports. Access to any of these
2871 * objects can result in a system crash !!!
2874 * This routine assumes no locks are held on entry.
2877 fc_remove_host(struct Scsi_Host *shost)
2879 struct fc_vport *vport = NULL, *next_vport = NULL;
2880 struct fc_rport *rport = NULL, *next_rport = NULL;
2881 struct workqueue_struct *work_q;
2882 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2883 unsigned long flags;
2885 spin_lock_irqsave(shost->host_lock, flags);
2887 /* Remove any vports */
2888 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2889 vport->flags |= FC_VPORT_DELETING;
2890 fc_queue_work(shost, &vport->vport_delete_work);
2893 /* Remove any remote ports */
2894 list_for_each_entry_safe(rport, next_rport,
2895 &fc_host->rports, peers) {
2896 list_del(&rport->peers);
2897 rport->port_state = FC_PORTSTATE_DELETED;
2898 fc_queue_work(shost, &rport->rport_delete_work);
2901 list_for_each_entry_safe(rport, next_rport,
2902 &fc_host->rport_bindings, peers) {
2903 list_del(&rport->peers);
2904 rport->port_state = FC_PORTSTATE_DELETED;
2905 fc_queue_work(shost, &rport->rport_delete_work);
2908 spin_unlock_irqrestore(shost->host_lock, flags);
2910 /* flush all scan work items */
2911 scsi_flush_work(shost);
2913 /* flush all stgt delete, and rport delete work items, then kill it */
2914 if (fc_host->work_q) {
2915 work_q = fc_host->work_q;
2916 fc_host->work_q = NULL;
2917 destroy_workqueue(work_q);
2920 /* flush all devloss work items, then kill it */
2921 if (fc_host->devloss_work_q) {
2922 work_q = fc_host->devloss_work_q;
2923 fc_host->devloss_work_q = NULL;
2924 destroy_workqueue(work_q);
2927 EXPORT_SYMBOL(fc_remove_host);
2929 static void fc_terminate_rport_io(struct fc_rport *rport)
2931 struct Scsi_Host *shost = rport_to_shost(rport);
2932 struct fc_internal *i = to_fc_internal(shost->transportt);
2934 /* Involve the LLDD if possible to terminate all io on the rport. */
2935 if (i->f->terminate_rport_io)
2936 i->f->terminate_rport_io(rport);
2939 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
2941 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
2945 * fc_starget_delete - called to delete the scsi descendants of an rport
2946 * @work: remote port to be operated on.
2948 * Deletes target and all sdevs.
2951 fc_starget_delete(struct work_struct *work)
2953 struct fc_rport *rport =
2954 container_of(work, struct fc_rport, stgt_delete_work);
2956 fc_terminate_rport_io(rport);
2957 scsi_remove_target(&rport->dev);
2962 * fc_rport_final_delete - finish rport termination and delete it.
2963 * @work: remote port to be deleted.
2966 fc_rport_final_delete(struct work_struct *work)
2968 struct fc_rport *rport =
2969 container_of(work, struct fc_rport, rport_delete_work);
2970 struct device *dev = &rport->dev;
2971 struct Scsi_Host *shost = rport_to_shost(rport);
2972 struct fc_internal *i = to_fc_internal(shost->transportt);
2973 unsigned long flags;
2974 int do_callback = 0;
2976 fc_terminate_rport_io(rport);
2979 * if a scan is pending, flush the SCSI Host work_q so that
2980 * that we can reclaim the rport scan work element.
2982 if (rport->flags & FC_RPORT_SCAN_PENDING)
2983 scsi_flush_work(shost);
2986 * Cancel any outstanding timers. These should really exist
2987 * only when rmmod'ing the LLDD and we're asking for
2988 * immediate termination of the rports
2990 spin_lock_irqsave(shost->host_lock, flags);
2991 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2992 spin_unlock_irqrestore(shost->host_lock, flags);
2993 if (!cancel_delayed_work(&rport->fail_io_work))
2994 fc_flush_devloss(shost);
2995 if (!cancel_delayed_work(&rport->dev_loss_work))
2996 fc_flush_devloss(shost);
2997 cancel_work_sync(&rport->scan_work);
2998 spin_lock_irqsave(shost->host_lock, flags);
2999 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3001 spin_unlock_irqrestore(shost->host_lock, flags);
3003 /* Delete SCSI target and sdevs */
3004 if (rport->scsi_target_id != -1)
3005 fc_starget_delete(&rport->stgt_delete_work);
3008 * Notify the driver that the rport is now dead. The LLDD will
3009 * also guarantee that any communication to the rport is terminated
3011 * Avoid this call if we already called it when we preserved the
3012 * rport for the binding.
3014 spin_lock_irqsave(shost->host_lock, flags);
3015 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
3016 (i->f->dev_loss_tmo_callbk)) {
3017 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3020 spin_unlock_irqrestore(shost->host_lock, flags);
3023 i->f->dev_loss_tmo_callbk(rport);
3025 fc_bsg_remove(rport->rqst_q);
3027 transport_remove_device(dev);
3029 transport_destroy_device(dev);
3030 scsi_host_put(shost); /* for fc_host->rport list */
3031 put_device(dev); /* for self-reference */
3036 * fc_remote_port_create - allocates and creates a remote FC port.
3037 * @shost: scsi host the remote port is connected to.
3038 * @channel: Channel on shost port connected to.
3039 * @ids: The world wide names, fc address, and FC4 port
3040 * roles for the remote port.
3042 * Allocates and creates the remoter port structure, including the
3043 * class and sysfs creation.
3046 * This routine assumes no locks are held on entry.
3048 static struct fc_rport *
3049 fc_remote_port_create(struct Scsi_Host *shost, int channel,
3050 struct fc_rport_identifiers *ids)
3052 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3053 struct fc_internal *fci = to_fc_internal(shost->transportt);
3054 struct fc_rport *rport;
3056 unsigned long flags;
3060 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
3061 rport = kzalloc(size, GFP_KERNEL);
3062 if (unlikely(!rport)) {
3063 printk(KERN_ERR "%s: allocation failure\n", __func__);
3067 rport->maxframe_size = -1;
3068 rport->supported_classes = FC_COS_UNSPECIFIED;
3069 rport->dev_loss_tmo = fc_host->dev_loss_tmo;
3070 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
3071 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
3072 rport->port_id = ids->port_id;
3073 rport->roles = ids->roles;
3074 rport->port_state = FC_PORTSTATE_ONLINE;
3075 if (fci->f->dd_fcrport_size)
3076 rport->dd_data = &rport[1];
3077 rport->channel = channel;
3078 rport->fast_io_fail_tmo = -1;
3080 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
3081 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
3082 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
3083 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
3084 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
3086 spin_lock_irqsave(shost->host_lock, flags);
3088 rport->number = fc_host->next_rport_number++;
3089 if ((rport->roles & FC_PORT_ROLE_FCP_TARGET) ||
3090 (rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR))
3091 rport->scsi_target_id = fc_host->next_target_id++;
3093 rport->scsi_target_id = -1;
3094 list_add_tail(&rport->peers, &fc_host->rports);
3095 scsi_host_get(shost); /* for fc_host->rport list */
3097 spin_unlock_irqrestore(shost->host_lock, flags);
3100 device_initialize(dev); /* takes self reference */
3101 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
3102 dev->release = fc_rport_dev_release;
3103 dev_set_name(dev, "rport-%d:%d-%d",
3104 shost->host_no, channel, rport->number);
3105 transport_setup_device(dev);
3107 error = device_add(dev);
3109 printk(KERN_ERR "FC Remote Port device_add failed\n");
3112 transport_add_device(dev);
3113 transport_configure_device(dev);
3115 fc_bsg_rportadd(shost, rport);
3116 /* ignore any bsg add error - we just can't do sgio */
3118 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
3119 /* initiate a scan of the target */
3120 rport->flags |= FC_RPORT_SCAN_PENDING;
3121 scsi_queue_work(shost, &rport->scan_work);
3127 transport_destroy_device(dev);
3128 spin_lock_irqsave(shost->host_lock, flags);
3129 list_del(&rport->peers);
3130 scsi_host_put(shost); /* for fc_host->rport list */
3131 spin_unlock_irqrestore(shost->host_lock, flags);
3132 put_device(dev->parent);
3138 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
3139 * @shost: scsi host the remote port is connected to.
3140 * @channel: Channel on shost port connected to.
3141 * @ids: The world wide names, fc address, and FC4 port
3142 * roles for the remote port.
3144 * The LLDD calls this routine to notify the transport of the existence
3145 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
3146 * of the port, it's FC address (port_id), and the FC4 roles that are
3147 * active for the port.
3149 * For ports that are FCP targets (aka scsi targets), the FC transport
3150 * maintains consistent target id bindings on behalf of the LLDD.
3151 * A consistent target id binding is an assignment of a target id to
3152 * a remote port identifier, which persists while the scsi host is
3153 * attached. The remote port can disappear, then later reappear, and
3154 * it's target id assignment remains the same. This allows for shifts
3155 * in FC addressing (if binding by wwpn or wwnn) with no apparent
3156 * changes to the scsi subsystem which is based on scsi host number and
3157 * target id values. Bindings are only valid during the attachment of
3158 * the scsi host. If the host detaches, then later re-attaches, target
3159 * id bindings may change.
3161 * This routine is responsible for returning a remote port structure.
3162 * The routine will search the list of remote ports it maintains
3163 * internally on behalf of consistent target id mappings. If found, the
3164 * remote port structure will be reused. Otherwise, a new remote port
3165 * structure will be allocated.
3167 * Whenever a remote port is allocated, a new fc_remote_port class
3168 * device is created.
3170 * Should not be called from interrupt context.
3173 * This routine assumes no locks are held on entry.
3176 fc_remote_port_add(struct Scsi_Host *shost, int channel,
3177 struct fc_rport_identifiers *ids)
3179 struct fc_internal *fci = to_fc_internal(shost->transportt);
3180 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3181 struct fc_rport *rport;
3182 unsigned long flags;
3185 /* ensure any stgt delete functions are done */
3186 fc_flush_work(shost);
3189 * Search the list of "active" rports, for an rport that has been
3190 * deleted, but we've held off the real delete while the target
3191 * is in a "blocked" state.
3193 spin_lock_irqsave(shost->host_lock, flags);
3195 list_for_each_entry(rport, &fc_host->rports, peers) {
3197 if ((rport->port_state == FC_PORTSTATE_BLOCKED ||
3198 rport->port_state == FC_PORTSTATE_NOTPRESENT) &&
3199 (rport->channel == channel)) {
3201 switch (fc_host->tgtid_bind_type) {
3202 case FC_TGTID_BIND_BY_WWPN:
3203 case FC_TGTID_BIND_NONE:
3204 if (rport->port_name == ids->port_name)
3207 case FC_TGTID_BIND_BY_WWNN:
3208 if (rport->node_name == ids->node_name)
3211 case FC_TGTID_BIND_BY_ID:
3212 if (rport->port_id == ids->port_id)
3219 memcpy(&rport->node_name, &ids->node_name,
3220 sizeof(rport->node_name));
3221 memcpy(&rport->port_name, &ids->port_name,
3222 sizeof(rport->port_name));
3223 rport->port_id = ids->port_id;
3225 rport->port_state = FC_PORTSTATE_ONLINE;
3226 rport->roles = ids->roles;
3228 spin_unlock_irqrestore(shost->host_lock, flags);
3230 if (fci->f->dd_fcrport_size)
3231 memset(rport->dd_data, 0,
3232 fci->f->dd_fcrport_size);
3235 * If we were not a target, cancel the
3236 * io terminate and rport timers, and
3239 * If we were a target, but our new role
3240 * doesn't indicate a target, leave the
3241 * timers running expecting the role to
3242 * change as the target fully logs in. If
3243 * it doesn't, the target will be torn down.
3245 * If we were a target, and our role shows
3246 * we're still a target, cancel the timers
3247 * and kick off a scan.
3250 /* was a target, not in roles */
3251 if ((rport->scsi_target_id != -1) &&
3252 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
3256 * Stop the fail io and dev_loss timers.
3257 * If they flush, the port_state will
3258 * be checked and will NOOP the function.
3260 if (!cancel_delayed_work(&rport->fail_io_work))
3261 fc_flush_devloss(shost);
3262 if (!cancel_delayed_work(&rport->dev_loss_work))
3263 fc_flush_devloss(shost);
3265 spin_lock_irqsave(shost->host_lock, flags);
3267 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3268 FC_RPORT_DEVLOSS_PENDING |
3269 FC_RPORT_DEVLOSS_CALLBK_DONE);
3271 spin_unlock_irqrestore(shost->host_lock, flags);
3273 /* if target, initiate a scan */
3274 if (rport->scsi_target_id != -1) {
3275 scsi_target_unblock(&rport->dev,
3277 spin_lock_irqsave(shost->host_lock,
3279 rport->flags |= FC_RPORT_SCAN_PENDING;
3280 scsi_queue_work(shost,
3282 spin_unlock_irqrestore(shost->host_lock,
3286 fc_bsg_goose_queue(rport);
3294 * Search the bindings array
3295 * Note: if never a FCP target, you won't be on this list
3297 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
3299 /* search for a matching consistent binding */
3301 list_for_each_entry(rport, &fc_host->rport_bindings,
3303 if (rport->channel != channel)
3306 switch (fc_host->tgtid_bind_type) {
3307 case FC_TGTID_BIND_BY_WWPN:
3308 if (rport->port_name == ids->port_name)
3311 case FC_TGTID_BIND_BY_WWNN:
3312 if (rport->node_name == ids->node_name)
3315 case FC_TGTID_BIND_BY_ID:
3316 if (rport->port_id == ids->port_id)
3319 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3324 list_move_tail(&rport->peers, &fc_host->rports);
3330 memcpy(&rport->node_name, &ids->node_name,
3331 sizeof(rport->node_name));
3332 memcpy(&rport->port_name, &ids->port_name,
3333 sizeof(rport->port_name));
3334 rport->port_id = ids->port_id;
3335 rport->port_state = FC_PORTSTATE_ONLINE;
3336 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3338 if (fci->f->dd_fcrport_size)
3339 memset(rport->dd_data, 0,
3340 fci->f->dd_fcrport_size);
3341 spin_unlock_irqrestore(shost->host_lock, flags);
3343 fc_remote_port_rolechg(rport, ids->roles);
3348 spin_unlock_irqrestore(shost->host_lock, flags);
3350 /* No consistent binding found - create new remote port entry */
3351 rport = fc_remote_port_create(shost, channel, ids);
3355 EXPORT_SYMBOL(fc_remote_port_add);
3359 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
3360 * @rport: The remote port that no longer exists
3362 * The LLDD calls this routine to notify the transport that a remote
3363 * port is no longer part of the topology. Note: Although a port
3364 * may no longer be part of the topology, it may persist in the remote
3365 * ports displayed by the fc_host. We do this under 2 conditions:
3367 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
3368 * This allows the port to temporarily disappear, then reappear without
3369 * disrupting the SCSI device tree attached to it. During the "blocked"
3370 * period the port will still exist.
3372 * 2) If the port was a scsi target and disappears for longer than we
3373 * expect, we'll delete the port and the tear down the SCSI device tree
3374 * attached to it. However, we want to semi-persist the target id assigned
3375 * to that port if it eventually does exist. The port structure will
3376 * remain (although with minimal information) so that the target id
3377 * bindings also remain.
3379 * If the remote port is not an FCP Target, it will be fully torn down
3380 * and deallocated, including the fc_remote_port class device.
3382 * If the remote port is an FCP Target, the port will be placed in a
3383 * temporary blocked state. From the LLDD's perspective, the rport no
3384 * longer exists. From the SCSI midlayer's perspective, the SCSI target
3385 * exists, but all sdevs on it are blocked from further I/O. The following
3388 * If the remote port does not return (signaled by a LLDD call to
3389 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
3390 * scsi target is removed - killing all outstanding i/o and removing the
3391 * scsi devices attached to it. The port structure will be marked Not
3392 * Present and be partially cleared, leaving only enough information to
3393 * recognize the remote port relative to the scsi target id binding if
3394 * it later appears. The port will remain as long as there is a valid
3395 * binding (e.g. until the user changes the binding type or unloads the
3396 * scsi host with the binding).
3398 * If the remote port returns within the dev_loss_tmo value (and matches
3399 * according to the target id binding type), the port structure will be
3400 * reused. If it is no longer a SCSI target, the target will be torn
3401 * down. If it continues to be a SCSI target, then the target will be
3402 * unblocked (allowing i/o to be resumed), and a scan will be activated
3403 * to ensure that all luns are detected.
3405 * Called from normal process context only - cannot be called from interrupt.
3408 * This routine assumes no locks are held on entry.
3411 fc_remote_port_delete(struct fc_rport *rport)
3413 struct Scsi_Host *shost = rport_to_shost(rport);
3414 unsigned long timeout = rport->dev_loss_tmo;
3415 unsigned long flags;
3418 * No need to flush the fc_host work_q's, as all adds are synchronous.
3420 * We do need to reclaim the rport scan work element, so eventually
3421 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
3422 * there's still a scan pending.
3425 spin_lock_irqsave(shost->host_lock, flags);
3427 if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
3428 (rport->port_state != FC_PORTSTATE_MARGINAL)) {
3429 spin_unlock_irqrestore(shost->host_lock, flags);
3434 * In the past, we if this was not an FCP-Target, we would
3435 * unconditionally just jump to deleting the rport.
3436 * However, rports can be used as node containers by the LLDD,
3437 * and its not appropriate to just terminate the rport at the
3438 * first sign of a loss in connectivity. The LLDD may want to
3439 * send ELS traffic to re-validate the login. If the rport is
3440 * immediately deleted, it makes it inappropriate for a node
3442 * So... we now unconditionally wait dev_loss_tmo before
3443 * destroying an rport.
3446 rport->port_state = FC_PORTSTATE_BLOCKED;
3448 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
3450 spin_unlock_irqrestore(shost->host_lock, flags);
3452 scsi_target_block(&rport->dev);
3454 /* see if we need to kill io faster than waiting for device loss */
3455 if ((rport->fast_io_fail_tmo != -1) &&
3456 (rport->fast_io_fail_tmo < timeout))
3457 fc_queue_devloss_work(shost, &rport->fail_io_work,
3458 rport->fast_io_fail_tmo * HZ);
3460 /* cap the length the devices can be blocked until they are deleted */
3461 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
3463 EXPORT_SYMBOL(fc_remote_port_delete);
3466 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
3467 * @rport: The remote port that changed.
3468 * @roles: New roles for this port.
3470 * Description: The LLDD calls this routine to notify the transport that the
3471 * roles on a remote port may have changed. The largest effect of this is
3472 * if a port now becomes a FCP Target, it must be allocated a
3473 * scsi target id. If the port is no longer a FCP target, any
3474 * scsi target id value assigned to it will persist in case the
3475 * role changes back to include FCP Target. No changes in the scsi
3476 * midlayer will be invoked if the role changes (in the expectation
3477 * that the role will be resumed. If it doesn't normal error processing
3480 * Should not be called from interrupt context.
3483 * This routine assumes no locks are held on entry.
3486 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
3488 struct Scsi_Host *shost = rport_to_shost(rport);
3489 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3490 unsigned long flags;
3493 spin_lock_irqsave(shost->host_lock, flags);
3494 if (roles & FC_PORT_ROLE_FCP_TARGET) {
3495 if (rport->scsi_target_id == -1) {
3496 rport->scsi_target_id = fc_host->next_target_id++;
3498 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
3502 rport->roles = roles;
3504 spin_unlock_irqrestore(shost->host_lock, flags);
3508 * There may have been a delete timer running on the
3509 * port. Ensure that it is cancelled as we now know
3510 * the port is an FCP Target.
3511 * Note: we know the rport exists and is in an online
3512 * state as the LLDD would not have had an rport
3513 * reference to pass us.
3515 * Take no action on the del_timer failure as the state
3516 * machine state change will validate the
3519 if (!cancel_delayed_work(&rport->fail_io_work))
3520 fc_flush_devloss(shost);
3521 if (!cancel_delayed_work(&rport->dev_loss_work))
3522 fc_flush_devloss(shost);
3524 spin_lock_irqsave(shost->host_lock, flags);
3525 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3526 FC_RPORT_DEVLOSS_PENDING |
3527 FC_RPORT_DEVLOSS_CALLBK_DONE);
3528 spin_unlock_irqrestore(shost->host_lock, flags);
3530 /* ensure any stgt delete functions are done */
3531 fc_flush_work(shost);
3533 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
3534 /* initiate a scan of the target */
3535 spin_lock_irqsave(shost->host_lock, flags);
3536 rport->flags |= FC_RPORT_SCAN_PENDING;
3537 scsi_queue_work(shost, &rport->scan_work);
3538 spin_unlock_irqrestore(shost->host_lock, flags);
3541 EXPORT_SYMBOL(fc_remote_port_rolechg);
3544 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3545 * @work: rport target that failed to reappear in the allotted time.
3547 * Description: An attempt to delete a remote port blocks, and if it fails
3548 * to return in the allotted time this gets called.
3551 fc_timeout_deleted_rport(struct work_struct *work)
3553 struct fc_rport *rport =
3554 container_of(work, struct fc_rport, dev_loss_work.work);
3555 struct Scsi_Host *shost = rport_to_shost(rport);
3556 struct fc_internal *i = to_fc_internal(shost->transportt);
3557 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3558 unsigned long flags;
3559 int do_callback = 0;
3561 spin_lock_irqsave(shost->host_lock, flags);
3563 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3566 * If the port is ONLINE, then it came back. If it was a SCSI
3567 * target, validate it still is. If not, tear down the
3568 * scsi_target on it.
3570 if (((rport->port_state == FC_PORTSTATE_ONLINE) ||
3571 (rport->port_state == FC_PORTSTATE_MARGINAL)) &&
3572 (rport->scsi_target_id != -1) &&
3573 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
3574 dev_printk(KERN_ERR, &rport->dev,
3575 "blocked FC remote port time out: no longer"
3576 " a FCP target, removing starget\n");
3577 spin_unlock_irqrestore(shost->host_lock, flags);
3578 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
3579 fc_queue_work(shost, &rport->stgt_delete_work);
3583 /* NOOP state - we're flushing workq's */
3584 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3585 spin_unlock_irqrestore(shost->host_lock, flags);
3586 dev_printk(KERN_ERR, &rport->dev,
3587 "blocked FC remote port time out: leaving"
3589 (rport->scsi_target_id != -1) ? " and starget" : "");
3593 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3594 (rport->scsi_target_id == -1)) {
3595 list_del(&rport->peers);
3596 rport->port_state = FC_PORTSTATE_DELETED;
3597 dev_printk(KERN_ERR, &rport->dev,
3598 "blocked FC remote port time out: removing"
3600 (rport->scsi_target_id != -1) ? " and starget" : "");
3601 fc_queue_work(shost, &rport->rport_delete_work);
3602 spin_unlock_irqrestore(shost->host_lock, flags);
3606 dev_printk(KERN_ERR, &rport->dev,
3607 "blocked FC remote port time out: removing target and "
3608 "saving binding\n");
3610 list_move_tail(&rport->peers, &fc_host->rport_bindings);
3613 * Note: We do not remove or clear the hostdata area. This allows
3614 * host-specific target data to persist along with the
3615 * scsi_target_id. It's up to the host to manage it's hostdata area.
3619 * Reinitialize port attributes that may change if the port comes back.
3621 rport->maxframe_size = -1;
3622 rport->supported_classes = FC_COS_UNSPECIFIED;
3623 rport->roles = FC_PORT_ROLE_UNKNOWN;
3624 rport->port_state = FC_PORTSTATE_NOTPRESENT;
3625 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3628 * Pre-emptively kill I/O rather than waiting for the work queue
3629 * item to teardown the starget. (FCOE libFC folks prefer this
3630 * and to have the rport_port_id still set when it's done).
3632 spin_unlock_irqrestore(shost->host_lock, flags);
3633 fc_terminate_rport_io(rport);
3635 spin_lock_irqsave(shost->host_lock, flags);
3637 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */
3639 /* remove the identifiers that aren't used in the consisting binding */
3640 switch (fc_host->tgtid_bind_type) {
3641 case FC_TGTID_BIND_BY_WWPN:
3642 rport->node_name = -1;
3643 rport->port_id = -1;
3645 case FC_TGTID_BIND_BY_WWNN:
3646 rport->port_name = -1;
3647 rport->port_id = -1;
3649 case FC_TGTID_BIND_BY_ID:
3650 rport->node_name = -1;
3651 rport->port_name = -1;
3653 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3658 * As this only occurs if the remote port (scsi target)
3659 * went away and didn't come back - we'll remove
3660 * all attached scsi devices.
3662 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3663 fc_queue_work(shost, &rport->stgt_delete_work);
3668 spin_unlock_irqrestore(shost->host_lock, flags);
3671 * Notify the driver that the rport is now dead. The LLDD will
3672 * also guarantee that any communication to the rport is terminated
3674 * Note: we set the CALLBK_DONE flag above to correspond
3676 if (do_callback && i->f->dev_loss_tmo_callbk)
3677 i->f->dev_loss_tmo_callbk(rport);
3682 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3683 * @work: rport to terminate io on.
3685 * Notes: Only requests the failure of the io, not that all are flushed
3686 * prior to returning.
3689 fc_timeout_fail_rport_io(struct work_struct *work)
3691 struct fc_rport *rport =
3692 container_of(work, struct fc_rport, fail_io_work.work);
3694 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3697 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3698 fc_terminate_rport_io(rport);
3702 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3703 * @work: remote port to be scanned.
3706 fc_scsi_scan_rport(struct work_struct *work)
3708 struct fc_rport *rport =
3709 container_of(work, struct fc_rport, scan_work);
3710 struct Scsi_Host *shost = rport_to_shost(rport);
3711 struct fc_internal *i = to_fc_internal(shost->transportt);
3712 unsigned long flags;
3714 if (((rport->port_state == FC_PORTSTATE_ONLINE) ||
3715 (rport->port_state == FC_PORTSTATE_MARGINAL)) &&
3716 (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3717 !(i->f->disable_target_scan)) {
3718 scsi_scan_target(&rport->dev, rport->channel,
3719 rport->scsi_target_id, SCAN_WILD_CARD,
3723 spin_lock_irqsave(shost->host_lock, flags);
3724 rport->flags &= ~FC_RPORT_SCAN_PENDING;
3725 spin_unlock_irqrestore(shost->host_lock, flags);
3729 * fc_block_rport() - Block SCSI eh thread for blocked fc_rport.
3730 * @rport: Remote port that scsi_eh is trying to recover.
3732 * This routine can be called from a FC LLD scsi_eh callback. It
3733 * blocks the scsi_eh thread until the fc_rport leaves the
3734 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3735 * necessary to avoid the scsi_eh failing recovery actions for blocked
3736 * rports which would lead to offlined SCSI devices.
3738 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3739 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3740 * passed back to scsi_eh.
3742 int fc_block_rport(struct fc_rport *rport)
3744 struct Scsi_Host *shost = rport_to_shost(rport);
3745 unsigned long flags;
3747 spin_lock_irqsave(shost->host_lock, flags);
3748 while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3749 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
3750 spin_unlock_irqrestore(shost->host_lock, flags);
3752 spin_lock_irqsave(shost->host_lock, flags);
3754 spin_unlock_irqrestore(shost->host_lock, flags);
3756 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3757 return FAST_IO_FAIL;
3761 EXPORT_SYMBOL(fc_block_rport);
3764 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3765 * @cmnd: SCSI command that scsi_eh is trying to recover
3767 * This routine can be called from a FC LLD scsi_eh callback. It
3768 * blocks the scsi_eh thread until the fc_rport leaves the
3769 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3770 * necessary to avoid the scsi_eh failing recovery actions for blocked
3771 * rports which would lead to offlined SCSI devices.
3773 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3774 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3775 * passed back to scsi_eh.
3777 int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
3779 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3781 if (WARN_ON_ONCE(!rport))
3782 return FAST_IO_FAIL;
3784 return fc_block_rport(rport);
3786 EXPORT_SYMBOL(fc_block_scsi_eh);
3789 * fc_eh_should_retry_cmd - Checks if the cmd should be retried or not
3790 * @scmd: The SCSI command to be checked
3792 * This checks the rport state to decide if a cmd is
3795 * Returns: true if the rport state is not in marginal state.
3797 bool fc_eh_should_retry_cmd(struct scsi_cmnd *scmd)
3799 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
3801 if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
3802 (scsi_cmd_to_rq(scmd)->cmd_flags & REQ_FAILFAST_TRANSPORT)) {
3803 set_host_byte(scmd, DID_TRANSPORT_MARGINAL);
3808 EXPORT_SYMBOL_GPL(fc_eh_should_retry_cmd);
3811 * fc_vport_setup - allocates and creates a FC virtual port.
3812 * @shost: scsi host the virtual port is connected to.
3813 * @channel: Channel on shost port connected to.
3814 * @pdev: parent device for vport
3815 * @ids: The world wide names, FC4 port roles, etc for
3817 * @ret_vport: The pointer to the created vport.
3819 * Allocates and creates the vport structure, calls the parent host
3820 * to instantiate the vport, this completes w/ class and sysfs creation.
3823 * This routine assumes no locks are held on entry.
3826 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
3827 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3829 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3830 struct fc_internal *fci = to_fc_internal(shost->transportt);
3831 struct fc_vport *vport;
3833 unsigned long flags;
3839 if ( ! fci->f->vport_create)
3842 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3843 vport = kzalloc(size, GFP_KERNEL);
3844 if (unlikely(!vport)) {
3845 printk(KERN_ERR "%s: allocation failure\n", __func__);
3849 vport->vport_state = FC_VPORT_UNKNOWN;
3850 vport->vport_last_state = FC_VPORT_UNKNOWN;
3851 vport->node_name = ids->node_name;
3852 vport->port_name = ids->port_name;
3853 vport->roles = ids->roles;
3854 vport->vport_type = ids->vport_type;
3855 if (fci->f->dd_fcvport_size)
3856 vport->dd_data = &vport[1];
3857 vport->shost = shost;
3858 vport->channel = channel;
3859 vport->flags = FC_VPORT_CREATING;
3860 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
3862 spin_lock_irqsave(shost->host_lock, flags);
3864 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3865 spin_unlock_irqrestore(shost->host_lock, flags);
3869 fc_host->npiv_vports_inuse++;
3870 vport->number = fc_host->next_vport_number++;
3871 list_add_tail(&vport->peers, &fc_host->vports);
3872 scsi_host_get(shost); /* for fc_host->vport list */
3874 spin_unlock_irqrestore(shost->host_lock, flags);
3877 device_initialize(dev); /* takes self reference */
3878 dev->parent = get_device(pdev); /* takes parent reference */
3879 dev->release = fc_vport_dev_release;
3880 dev_set_name(dev, "vport-%d:%d-%d",
3881 shost->host_no, channel, vport->number);
3882 transport_setup_device(dev);
3884 error = device_add(dev);
3886 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3889 transport_add_device(dev);
3890 transport_configure_device(dev);
3892 error = fci->f->vport_create(vport, ids->disable);
3894 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3895 goto delete_vport_all;
3899 * if the parent isn't the physical adapter's Scsi_Host, ensure
3900 * the Scsi_Host at least contains a symlink to the vport.
3902 if (pdev != &shost->shost_gendev) {
3903 error = sysfs_create_link(&shost->shost_gendev.kobj,
3904 &dev->kobj, dev_name(dev));
3907 "%s: Cannot create vport symlinks for "
3909 __func__, dev_name(dev), error);
3911 spin_lock_irqsave(shost->host_lock, flags);
3912 vport->flags &= ~FC_VPORT_CREATING;
3913 spin_unlock_irqrestore(shost->host_lock, flags);
3915 dev_printk(KERN_NOTICE, pdev,
3916 "%s created via shost%d channel %d\n", dev_name(dev),
3917 shost->host_no, channel);
3924 transport_remove_device(dev);
3927 transport_destroy_device(dev);
3928 spin_lock_irqsave(shost->host_lock, flags);
3929 list_del(&vport->peers);
3930 scsi_host_put(shost); /* for fc_host->vport list */
3931 fc_host->npiv_vports_inuse--;
3932 spin_unlock_irqrestore(shost->host_lock, flags);
3933 put_device(dev->parent);
3940 * fc_vport_create - Admin App or LLDD requests creation of a vport
3941 * @shost: scsi host the virtual port is connected to.
3942 * @channel: channel on shost port connected to.
3943 * @ids: The world wide names, FC4 port roles, etc for
3947 * This routine assumes no locks are held on entry.
3950 fc_vport_create(struct Scsi_Host *shost, int channel,
3951 struct fc_vport_identifiers *ids)
3954 struct fc_vport *vport;
3956 stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3958 return stat ? NULL : vport;
3960 EXPORT_SYMBOL(fc_vport_create);
3963 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3964 * @vport: fc_vport to be terminated
3966 * Calls the LLDD vport_delete() function, then deallocates and removes
3967 * the vport from the shost and object tree.
3970 * This routine assumes no locks are held on entry.
3973 fc_vport_terminate(struct fc_vport *vport)
3975 struct Scsi_Host *shost = vport_to_shost(vport);
3976 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3977 struct fc_internal *i = to_fc_internal(shost->transportt);
3978 struct device *dev = &vport->dev;
3979 unsigned long flags;
3982 if (i->f->vport_delete)
3983 stat = i->f->vport_delete(vport);
3987 spin_lock_irqsave(shost->host_lock, flags);
3988 vport->flags &= ~FC_VPORT_DELETING;
3990 vport->flags |= FC_VPORT_DELETED;
3991 list_del(&vport->peers);
3992 fc_host->npiv_vports_inuse--;
3993 scsi_host_put(shost); /* for fc_host->vport list */
3995 spin_unlock_irqrestore(shost->host_lock, flags);
4000 if (dev->parent != &shost->shost_gendev)
4001 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
4002 transport_remove_device(dev);
4004 transport_destroy_device(dev);
4007 * Removing our self-reference should mean our
4008 * release function gets called, which will drop the remaining
4009 * parent reference and free the data structure.
4011 put_device(dev); /* for self-reference */
4013 return 0; /* SUCCESS */
4015 EXPORT_SYMBOL(fc_vport_terminate);
4018 * fc_vport_sched_delete - workq-based delete request for a vport
4019 * @work: vport to be deleted.
4022 fc_vport_sched_delete(struct work_struct *work)
4024 struct fc_vport *vport =
4025 container_of(work, struct fc_vport, vport_delete_work);
4028 stat = fc_vport_terminate(vport);
4030 dev_printk(KERN_ERR, vport->dev.parent,
4031 "%s: %s could not be deleted created via "
4032 "shost%d channel %d - error %d\n", __func__,
4033 dev_name(&vport->dev), vport->shost->host_no,
4034 vport->channel, stat);
4043 * fc_bsg_job_timeout - handler for when a bsg request timesout
4044 * @req: request that timed out
4046 static enum blk_eh_timer_return
4047 fc_bsg_job_timeout(struct request *req)
4049 struct bsg_job *job = blk_mq_rq_to_pdu(req);
4050 struct Scsi_Host *shost = fc_bsg_to_shost(job);
4051 struct fc_rport *rport = fc_bsg_to_rport(job);
4052 struct fc_internal *i = to_fc_internal(shost->transportt);
4053 int err = 0, inflight = 0;
4055 if (rport && rport->port_state == FC_PORTSTATE_BLOCKED)
4056 return BLK_EH_RESET_TIMER;
4058 inflight = bsg_job_get(job);
4060 if (inflight && i->f->bsg_timeout) {
4061 /* call LLDD to abort the i/o as it has timed out */
4062 err = i->f->bsg_timeout(job);
4063 if (err == -EAGAIN) {
4065 return BLK_EH_RESET_TIMER;
4067 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
4068 "abort failed with status %d\n", err);
4071 /* the blk_end_sync_io() doesn't check the error */
4073 blk_mq_end_request(req, BLK_STS_IOERR);
4078 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
4079 * @shost: scsi host rport attached to
4080 * @job: bsg job to be processed
4082 static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
4084 struct fc_internal *i = to_fc_internal(shost->transportt);
4085 struct fc_bsg_request *bsg_request = job->request;
4086 struct fc_bsg_reply *bsg_reply = job->reply;
4087 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
4090 /* check if we really have all the request data needed */
4091 if (job->request_len < cmdlen) {
4096 /* Validate the host command */
4097 switch (bsg_request->msgcode) {
4098 case FC_BSG_HST_ADD_RPORT:
4099 cmdlen += sizeof(struct fc_bsg_host_add_rport);
4102 case FC_BSG_HST_DEL_RPORT:
4103 cmdlen += sizeof(struct fc_bsg_host_del_rport);
4106 case FC_BSG_HST_ELS_NOLOGIN:
4107 cmdlen += sizeof(struct fc_bsg_host_els);
4108 /* there better be a xmt and rcv payloads */
4109 if ((!job->request_payload.payload_len) ||
4110 (!job->reply_payload.payload_len)) {
4117 cmdlen += sizeof(struct fc_bsg_host_ct);
4118 /* there better be xmt and rcv payloads */
4119 if ((!job->request_payload.payload_len) ||
4120 (!job->reply_payload.payload_len)) {
4126 case FC_BSG_HST_VENDOR:
4127 cmdlen += sizeof(struct fc_bsg_host_vendor);
4128 if ((shost->hostt->vendor_id == 0L) ||
4129 (bsg_request->rqst_data.h_vendor.vendor_id !=
4130 shost->hostt->vendor_id)) {
4141 ret = i->f->bsg_request(job);
4146 /* return the errno failure code as the only status */
4147 BUG_ON(job->reply_len < sizeof(uint32_t));
4148 bsg_reply->reply_payload_rcv_len = 0;
4149 bsg_reply->result = ret;
4150 job->reply_len = sizeof(uint32_t);
4151 bsg_job_done(job, bsg_reply->result,
4152 bsg_reply->reply_payload_rcv_len);
4158 * fc_bsg_goose_queue - restart rport queue in case it was stopped
4159 * @rport: rport to be restarted
4162 fc_bsg_goose_queue(struct fc_rport *rport)
4164 struct request_queue *q = rport->rqst_q;
4167 blk_mq_run_hw_queues(q, true);
4171 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
4172 * @shost: scsi host rport attached to
4173 * @job: bsg job to be processed
4175 static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
4177 struct fc_internal *i = to_fc_internal(shost->transportt);
4178 struct fc_bsg_request *bsg_request = job->request;
4179 struct fc_bsg_reply *bsg_reply = job->reply;
4180 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
4183 /* check if we really have all the request data needed */
4184 if (job->request_len < cmdlen) {
4186 goto fail_rport_msg;
4189 /* Validate the rport command */
4190 switch (bsg_request->msgcode) {
4191 case FC_BSG_RPT_ELS:
4192 cmdlen += sizeof(struct fc_bsg_rport_els);
4196 cmdlen += sizeof(struct fc_bsg_rport_ct);
4198 /* there better be xmt and rcv payloads */
4199 if ((!job->request_payload.payload_len) ||
4200 (!job->reply_payload.payload_len)) {
4202 goto fail_rport_msg;
4207 goto fail_rport_msg;
4210 ret = i->f->bsg_request(job);
4215 /* return the errno failure code as the only status */
4216 BUG_ON(job->reply_len < sizeof(uint32_t));
4217 bsg_reply->reply_payload_rcv_len = 0;
4218 bsg_reply->result = ret;
4219 job->reply_len = sizeof(uint32_t);
4220 bsg_job_done(job, bsg_reply->result,
4221 bsg_reply->reply_payload_rcv_len);
4225 static int fc_bsg_dispatch(struct bsg_job *job)
4227 struct Scsi_Host *shost = fc_bsg_to_shost(job);
4229 if (scsi_is_fc_rport(job->dev))
4230 return fc_bsg_rport_dispatch(shost, job);
4232 return fc_bsg_host_dispatch(shost, job);
4235 static blk_status_t fc_bsg_rport_prep(struct fc_rport *rport)
4237 if (rport->port_state == FC_PORTSTATE_BLOCKED &&
4238 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
4239 return BLK_STS_RESOURCE;
4241 if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
4242 (rport->port_state != FC_PORTSTATE_MARGINAL))
4243 return BLK_STS_IOERR;
4249 static int fc_bsg_dispatch_prep(struct bsg_job *job)
4251 struct fc_rport *rport = fc_bsg_to_rport(job);
4254 ret = fc_bsg_rport_prep(rport);
4258 case BLK_STS_RESOURCE:
4264 return fc_bsg_dispatch(job);
4268 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
4269 * @shost: shost for fc_host
4270 * @fc_host: fc_host adding the structures to
4273 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
4275 struct device *dev = &shost->shost_gendev;
4276 struct fc_internal *i = to_fc_internal(shost->transportt);
4277 struct request_queue *q;
4280 fc_host->rqst_q = NULL;
4282 if (!i->f->bsg_request)
4285 snprintf(bsg_name, sizeof(bsg_name),
4286 "fc_host%d", shost->host_no);
4288 q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, fc_bsg_job_timeout,
4292 "fc_host%d: bsg interface failed to initialize - setup queue\n",
4296 __scsi_init_queue(shost, q);
4297 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
4298 fc_host->rqst_q = q;
4303 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
4304 * @shost: shost that rport is attached to
4305 * @rport: rport that the bsg hooks are being attached to
4308 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
4310 struct device *dev = &rport->dev;
4311 struct fc_internal *i = to_fc_internal(shost->transportt);
4312 struct request_queue *q;
4314 rport->rqst_q = NULL;
4316 if (!i->f->bsg_request)
4319 q = bsg_setup_queue(dev, dev_name(dev), fc_bsg_dispatch_prep,
4320 fc_bsg_job_timeout, i->f->dd_bsg_size);
4322 dev_err(dev, "failed to setup bsg queue\n");
4325 __scsi_init_queue(shost, q);
4326 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
4333 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
4334 * @q: the request_queue that is to be torn down.
4337 * Before unregistering the queue empty any requests that are blocked
4342 fc_bsg_remove(struct request_queue *q)
4344 bsg_remove_queue(q);
4348 /* Original Author: Martin Hicks */
4349 MODULE_AUTHOR("James Smart");
4350 MODULE_DESCRIPTION("FC Transport Attributes");
4351 MODULE_LICENSE("GPL");
4353 module_init(fc_transport_init);
4354 module_exit(fc_transport_exit);