1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * FiberChannel transport specific attributes exported to sysfs.
4 *
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...
9 * Add vports, etc
10 */
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"
27
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);
42
43 /*
44 * Module Parameters
45 */
46
47 /*
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.
51 */
52 static unsigned int fc_dev_loss_tmo = 60; /* seconds */
53
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.");
61
62 /*
63 * Redefine so that we can have same named attributes in the
64 * sdev/starget/host objects.
65 */
66 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
67 struct device_attribute device_attr_##_prefix##_##_name = \
68 __ATTR(_name,_mode,_show,_store)
69
70 #define fc_enum_name_search(title, table_type, table) \
71 static const char *get_fc_##title##_name(enum table_type table_key) \
72 { \
73 int i; \
74 char *name = NULL; \
75 \
76 for (i = 0; i < ARRAY_SIZE(table); i++) { \
77 if (table[i].value == table_key) { \
78 name = table[i].name; \
79 break; \
80 } \
81 } \
82 return name; \
83 }
84
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) \
88 { \
89 int i; \
90 \
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 */ \
96 } \
97 } \
98 return 1; /* failure */ \
99 }
100
101
102 /* Convert fc_port_type values to ascii string name */
103 static struct {
104 enum fc_port_type value;
105 char *name;
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" },
115 };
116 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
117 #define FC_PORTTYPE_MAX_NAMELEN 50
118
119 /* Reuse fc_port_type enum function for vport_type */
120 #define get_fc_vport_type_name get_fc_port_type_name
121
122
123 /* Convert fc_host_event_code values to ascii string name */
124 static const struct {
125 enum fc_host_event_code value;
126 char *name;
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" },
141 };
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
145
146
147 /* Convert fc_port_state values to ascii string name */
148 static struct {
149 enum fc_port_state value;
150 char *name;
151 int matchlen;
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 },
165 };
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
169
170
171 /* Convert fc_vport_state values to ascii string name */
172 static struct {
173 enum fc_vport_state value;
174 char *name;
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" },
186 };
187 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
188 #define FC_VPORTSTATE_MAX_NAMELEN 24
189
190 /* Reuse fc_vport_state enum function for vport_last_state */
191 #define get_fc_vport_last_state_name get_fc_vport_state_name
192
193
194 /* Convert fc_tgtid_binding_type values to ascii string name */
195 static const struct {
196 enum fc_tgtid_binding_type value;
197 char *name;
198 int matchlen;
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 },
204 };
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
210
211
212 #define fc_bitfield_name_search(title, table) \
213 static ssize_t \
214 get_fc_##title##_names(u32 table_key, char *buf) \
215 { \
216 char *prefix = ""; \
217 ssize_t len = 0; \
218 int i; \
219 \
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); \
224 prefix = ", "; \
225 } \
226 } \
227 len += sprintf(buf + len, "\n"); \
228 return len; \
229 }
230
231
232 /* Convert FC_COS bit values to ascii string name */
233 static const struct {
234 u32 value;
235 char *name;
236 } fc_cos_names[] = {
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" },
242 };
243 fc_bitfield_name_search(cos, fc_cos_names)
244
245
246 /* Convert FC_PORTSPEED bit values to ascii string name */
247 static const struct {
248 u32 value;
249 char *name;
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" },
267 };
fc_bitfield_name_search(port_speed,fc_port_speed_names)268 fc_bitfield_name_search(port_speed, fc_port_speed_names)
269
270
271 static int
272 show_fc_fc4s (char *buf, u8 *fc4_list)
273 {
274 int i, len=0;
275
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");
279 return len;
280 }
281
282
283 /* Convert FC_PORT_ROLE bit values to ascii string name */
284 static const struct {
285 u32 value;
286 char *name;
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" },
295 };
296 fc_bitfield_name_search(port_roles, fc_port_role_names)
297
298 /*
299 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
300 */
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
308
309
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);
313
314 /*
315 * Attribute counts pre object type...
316 * Increase these values if you add attributes
317 */
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
322
323 struct fc_internal {
324 struct scsi_transport_template t;
325 struct fc_function_template *f;
326
327 /*
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.
332 *
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.
336 */
337 struct device_attribute private_starget_attrs[
338 FC_STARGET_NUM_ATTRS];
339 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
340
341 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
342 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
343
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];
347
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];
351 };
352
353 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
354
fc_target_setup(struct transport_container * tc,struct device * dev,struct device * cdev)355 static int fc_target_setup(struct transport_container *tc, struct device *dev,
356 struct device *cdev)
357 {
358 struct scsi_target *starget = to_scsi_target(dev);
359 struct fc_rport *rport = starget_to_rport(starget);
360
361 /*
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.
365 */
366 if (rport) {
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;
370 } else {
371 fc_starget_node_name(starget) = -1;
372 fc_starget_port_name(starget) = -1;
373 fc_starget_port_id(starget) = -1;
374 }
375
376 return 0;
377 }
378
379 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
380 "fc_transport",
381 fc_target_setup,
382 NULL,
383 NULL);
384
fc_host_setup(struct transport_container * tc,struct device * dev,struct device * cdev)385 static int fc_host_setup(struct transport_container *tc, struct device *dev,
386 struct device *cdev)
387 {
388 struct Scsi_Host *shost = dev_to_shost(dev);
389 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
390
391 /*
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.
395 */
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));
421
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));
432
433 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
434
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;
442
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)
447 return -ENOMEM;
448
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;
458 return -ENOMEM;
459 }
460
461 fc_bsg_hostadd(shost, fc_host);
462 /* ignore any bsg add error - we just can't do sgio */
463
464 return 0;
465 }
466
fc_host_remove(struct transport_container * tc,struct device * dev,struct device * cdev)467 static int fc_host_remove(struct transport_container *tc, struct device *dev,
468 struct device *cdev)
469 {
470 struct Scsi_Host *shost = dev_to_shost(dev);
471 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
472
473 fc_bsg_remove(fc_host->rqst_q);
474 return 0;
475 }
476
477 static DECLARE_TRANSPORT_CLASS(fc_host_class,
478 "fc_host",
479 fc_host_setup,
480 fc_host_remove,
481 NULL);
482
483 /*
484 * Setup and Remove actions for remote ports are handled
485 * in the service functions below.
486 */
487 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
488 "fc_remote_ports",
489 NULL,
490 NULL,
491 NULL);
492
493 /*
494 * Setup and Remove actions for virtual ports are handled
495 * in the service functions below.
496 */
497 static DECLARE_TRANSPORT_CLASS(fc_vport_class,
498 "fc_vports",
499 NULL,
500 NULL,
501 NULL);
502
503 /*
504 * Netlink Infrastructure
505 */
506
507 static atomic_t fc_event_seq;
508
509 /**
510 * fc_get_event_number - Obtain the next sequential FC event number
511 *
512 * Notes:
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...
516 */
517 u32
fc_get_event_number(void)518 fc_get_event_number(void)
519 {
520 return atomic_add_return(1, &fc_event_seq);
521 }
522 EXPORT_SYMBOL(fc_get_event_number);
523
524 /**
525 * fc_host_post_fc_event - routine to do the work of posting an event
526 * on an fc_host.
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
533 *
534 * Notes:
535 * This routine assumes no locks are held on entry.
536 */
537 void
fc_host_post_fc_event(struct Scsi_Host * shost,u32 event_number,enum fc_host_event_code event_code,u32 data_len,char * data_buf,u64 vendor_id)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)
541 {
542 struct sk_buff *skb;
543 struct nlmsghdr *nlh;
544 struct fc_nl_event *event;
545 const char *name;
546 size_t len, padding;
547 int err;
548
549 if (!data_buf || data_len < 4)
550 data_len = 0;
551
552 if (!scsi_nl_sock) {
553 err = -ENOENT;
554 goto send_fail;
555 }
556
557 len = FC_NL_MSGALIGN(sizeof(*event) - sizeof(event->event_data) + data_len);
558
559 skb = nlmsg_new(len, GFP_KERNEL);
560 if (!skb) {
561 err = -ENOBUFS;
562 goto send_fail;
563 }
564
565 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
566 if (!nlh) {
567 err = -ENOBUFS;
568 goto send_fail_skb;
569 }
570 event = nlmsg_data(nlh);
571
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;
580 if (data_len)
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);
584
585 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
586 GFP_KERNEL);
587 return;
588
589 send_fail_skb:
590 kfree_skb(skb);
591 send_fail:
592 name = get_fc_host_event_code_name(event_code);
593 printk(KERN_WARNING
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);
598 return;
599 }
600 EXPORT_SYMBOL(fc_host_post_fc_event);
601
602 /**
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
608 *
609 * Notes:
610 * This routine assumes no locks are held on entry.
611 */
612 void
fc_host_post_event(struct Scsi_Host * shost,u32 event_number,enum fc_host_event_code event_code,u32 event_data)613 fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
614 enum fc_host_event_code event_code, u32 event_data)
615 {
616 fc_host_post_fc_event(shost, event_number, event_code,
617 (u32)sizeof(u32), (char *)&event_data, 0);
618 }
619 EXPORT_SYMBOL(fc_host_post_event);
620
621
622 /**
623 * fc_host_post_vendor_event - called to post a vendor unique event
624 * on an fc_host
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
630 *
631 * Notes:
632 * This routine assumes no locks are held on entry.
633 */
634 void
fc_host_post_vendor_event(struct Scsi_Host * shost,u32 event_number,u32 data_len,char * data_buf,u64 vendor_id)635 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
636 u32 data_len, char * data_buf, u64 vendor_id)
637 {
638 fc_host_post_fc_event(shost, event_number, FCH_EVT_VENDOR_UNIQUE,
639 data_len, data_buf, vendor_id);
640 }
641 EXPORT_SYMBOL(fc_host_post_vendor_event);
642
643 /**
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
647 *
648 * Notes:
649 * This routine assumes no locks are held on entry.
650 */
651 struct fc_rport *
fc_find_rport_by_wwpn(struct Scsi_Host * shost,u64 wwpn)652 fc_find_rport_by_wwpn(struct Scsi_Host *shost, u64 wwpn)
653 {
654 struct fc_rport *rport;
655 unsigned long flags;
656
657 spin_lock_irqsave(shost->host_lock, flags);
658
659 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
660 if (rport->port_state != FC_PORTSTATE_ONLINE)
661 continue;
662
663 if (rport->port_name == wwpn) {
664 spin_unlock_irqrestore(shost->host_lock, flags);
665 return rport;
666 }
667 }
668
669 spin_unlock_irqrestore(shost->host_lock, flags);
670 return NULL;
671 }
672 EXPORT_SYMBOL(fc_find_rport_by_wwpn);
673
674 static void
fc_li_stats_update(u16 event_type,struct fc_fpin_stats * stats)675 fc_li_stats_update(u16 event_type,
676 struct fc_fpin_stats *stats)
677 {
678 stats->li++;
679 switch (event_type) {
680 case FPIN_LI_UNKNOWN:
681 stats->li_failure_unknown++;
682 break;
683 case FPIN_LI_LINK_FAILURE:
684 stats->li_link_failure_count++;
685 break;
686 case FPIN_LI_LOSS_OF_SYNC:
687 stats->li_loss_of_sync_count++;
688 break;
689 case FPIN_LI_LOSS_OF_SIG:
690 stats->li_loss_of_signals_count++;
691 break;
692 case FPIN_LI_PRIM_SEQ_ERR:
693 stats->li_prim_seq_err_count++;
694 break;
695 case FPIN_LI_INVALID_TX_WD:
696 stats->li_invalid_tx_word_count++;
697 break;
698 case FPIN_LI_INVALID_CRC:
699 stats->li_invalid_crc_count++;
700 break;
701 case FPIN_LI_DEVICE_SPEC:
702 stats->li_device_specific++;
703 break;
704 }
705 }
706
707 static void
fc_delivery_stats_update(u32 reason_code,struct fc_fpin_stats * stats)708 fc_delivery_stats_update(u32 reason_code, struct fc_fpin_stats *stats)
709 {
710 stats->dn++;
711 switch (reason_code) {
712 case FPIN_DELI_UNKNOWN:
713 stats->dn_unknown++;
714 break;
715 case FPIN_DELI_TIMEOUT:
716 stats->dn_timeout++;
717 break;
718 case FPIN_DELI_UNABLE_TO_ROUTE:
719 stats->dn_unable_to_route++;
720 break;
721 case FPIN_DELI_DEVICE_SPEC:
722 stats->dn_device_specific++;
723 break;
724 }
725 }
726
727 static void
fc_cn_stats_update(u16 event_type,struct fc_fpin_stats * stats)728 fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats)
729 {
730 stats->cn++;
731 switch (event_type) {
732 case FPIN_CONGN_CLEAR:
733 stats->cn_clear++;
734 break;
735 case FPIN_CONGN_LOST_CREDIT:
736 stats->cn_lost_credit++;
737 break;
738 case FPIN_CONGN_CREDIT_STALL:
739 stats->cn_credit_stall++;
740 break;
741 case FPIN_CONGN_OVERSUBSCRIPTION:
742 stats->cn_oversubscription++;
743 break;
744 case FPIN_CONGN_DEVICE_SPEC:
745 stats->cn_device_specific++;
746 }
747 }
748
749 /*
750 * fc_fpin_li_stats_update - routine to update Link Integrity
751 * event statistics.
752 * @shost: host the FPIN was received on
753 * @tlv: pointer to link integrity descriptor
754 *
755 */
756 static void
fc_fpin_li_stats_update(struct Scsi_Host * shost,struct fc_tlv_desc * tlv)757 fc_fpin_li_stats_update(struct Scsi_Host *shost, struct fc_tlv_desc *tlv)
758 {
759 u8 i;
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);
765 u64 wwpn;
766
767 rport = fc_find_rport_by_wwpn(shost,
768 be64_to_cpu(li_desc->attached_wwpn));
769 if (rport &&
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);
774 }
775
776 if (be32_to_cpu(li_desc->pname_count) > 0) {
777 for (i = 0;
778 i < be32_to_cpu(li_desc->pname_count);
779 i++) {
780 wwpn = be64_to_cpu(li_desc->pname_list[i]);
781 rport = fc_find_rport_by_wwpn(shost, wwpn);
782 if (rport &&
783 (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
784 rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
785 if (rport == attach_rport)
786 continue;
787 fc_li_stats_update(event_type,
788 &rport->fpin_stats);
789 }
790 }
791 }
792
793 if (fc_host->port_name == be64_to_cpu(li_desc->attached_wwpn))
794 fc_li_stats_update(event_type, &fc_host->fpin_stats);
795 }
796
797 /*
798 * fc_fpin_delivery_stats_update - routine to update Delivery Notification
799 * event statistics.
800 * @shost: host the FPIN was received on
801 * @tlv: pointer to delivery descriptor
802 *
803 */
804 static void
fc_fpin_delivery_stats_update(struct Scsi_Host * shost,struct fc_tlv_desc * tlv)805 fc_fpin_delivery_stats_update(struct Scsi_Host *shost,
806 struct fc_tlv_desc *tlv)
807 {
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);
813
814 rport = fc_find_rport_by_wwpn(shost,
815 be64_to_cpu(dn_desc->attached_wwpn));
816 if (rport &&
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);
822 }
823
824 if (fc_host->port_name == be64_to_cpu(dn_desc->attached_wwpn))
825 fc_delivery_stats_update(reason_code, &fc_host->fpin_stats);
826 }
827
828 /*
829 * fc_fpin_peer_congn_stats_update - routine to update Peer Congestion
830 * event statistics.
831 * @shost: host the FPIN was received on
832 * @tlv: pointer to peer congestion descriptor
833 *
834 */
835 static void
fc_fpin_peer_congn_stats_update(struct Scsi_Host * shost,struct fc_tlv_desc * tlv)836 fc_fpin_peer_congn_stats_update(struct Scsi_Host *shost,
837 struct fc_tlv_desc *tlv)
838 {
839 u8 i;
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);
845 u64 wwpn;
846
847 rport = fc_find_rport_by_wwpn(shost,
848 be64_to_cpu(pc_desc->attached_wwpn));
849 if (rport &&
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);
854 }
855
856 if (be32_to_cpu(pc_desc->pname_count) > 0) {
857 for (i = 0;
858 i < be32_to_cpu(pc_desc->pname_count);
859 i++) {
860 wwpn = be64_to_cpu(pc_desc->pname_list[i]);
861 rport = fc_find_rport_by_wwpn(shost, wwpn);
862 if (rport &&
863 (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
864 rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
865 if (rport == attach_rport)
866 continue;
867 fc_cn_stats_update(event_type,
868 &rport->fpin_stats);
869 }
870 }
871 }
872 }
873
874 /*
875 * fc_fpin_congn_stats_update - routine to update Congestion
876 * event statistics.
877 * @shost: host the FPIN was received on
878 * @tlv: pointer to congestion descriptor
879 *
880 */
881 static void
fc_fpin_congn_stats_update(struct Scsi_Host * shost,struct fc_tlv_desc * tlv)882 fc_fpin_congn_stats_update(struct Scsi_Host *shost,
883 struct fc_tlv_desc *tlv)
884 {
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;
887
888 fc_cn_stats_update(be16_to_cpu(congn->event_type),
889 &fc_host->fpin_stats);
890 }
891
892 /**
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
897 *
898 * Notes:
899 * This routine assumes no locks are held on entry.
900 */
901 void
fc_host_fpin_rcv(struct Scsi_Host * shost,u32 fpin_len,char * fpin_buf)902 fc_host_fpin_rcv(struct Scsi_Host *shost, u32 fpin_len, char *fpin_buf)
903 {
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;
907 u32 dtag;
908
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));
913
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);
917 switch (dtag) {
918 case ELS_DTAG_LNK_INTEGRITY:
919 fc_fpin_li_stats_update(shost, tlv);
920 break;
921 case ELS_DTAG_DELIVERY:
922 fc_fpin_delivery_stats_update(shost, tlv);
923 break;
924 case ELS_DTAG_PEER_CONGEST:
925 fc_fpin_peer_congn_stats_update(shost, tlv);
926 break;
927 case ELS_DTAG_CONGESTION:
928 fc_fpin_congn_stats_update(shost, tlv);
929 }
930
931 desc_cnt++;
932 bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
933 tlv = fc_tlv_next_desc(tlv);
934 }
935
936 fc_host_post_fc_event(shost, fc_get_event_number(),
937 FCH_EVT_LINK_FPIN, fpin_len, fpin_buf, 0);
938 }
939 EXPORT_SYMBOL(fc_host_fpin_rcv);
940
941
fc_transport_init(void)942 static __init int fc_transport_init(void)
943 {
944 int error;
945
946 atomic_set(&fc_event_seq, 0);
947
948 error = transport_class_register(&fc_host_class);
949 if (error)
950 return error;
951 error = transport_class_register(&fc_vport_class);
952 if (error)
953 goto unreg_host_class;
954 error = transport_class_register(&fc_rport_class);
955 if (error)
956 goto unreg_vport_class;
957 error = transport_class_register(&fc_transport_class);
958 if (error)
959 goto unreg_rport_class;
960 return 0;
961
962 unreg_rport_class:
963 transport_class_unregister(&fc_rport_class);
964 unreg_vport_class:
965 transport_class_unregister(&fc_vport_class);
966 unreg_host_class:
967 transport_class_unregister(&fc_host_class);
968 return error;
969 }
970
fc_transport_exit(void)971 static void __exit fc_transport_exit(void)
972 {
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);
977 }
978
979 /*
980 * FC Remote Port Attribute Management
981 */
982
983 #define fc_rport_show_function(field, format_string, sz, cast) \
984 static ssize_t \
985 show_fc_rport_##field (struct device *dev, \
986 struct device_attribute *attr, char *buf) \
987 { \
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); \
997 }
998
999 #define fc_rport_store_function(field) \
1000 static ssize_t \
1001 store_fc_rport_##field(struct device *dev, \
1002 struct device_attribute *attr, \
1003 const char *buf, size_t count) \
1004 { \
1005 int val; \
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); \
1009 char *cp; \
1010 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
1011 (rport->port_state == FC_PORTSTATE_DELETED) || \
1012 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
1013 return -EBUSY; \
1014 val = simple_strtoul(buf, &cp, 0); \
1015 if (*cp && (*cp != '\n')) \
1016 return -EINVAL; \
1017 i->f->set_rport_##field(rport, val); \
1018 return count; \
1019 }
1020
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)
1025
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)
1030
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)
1037
1038
1039 #define fc_private_rport_show_function(field, format_string, sz, cast) \
1040 static ssize_t \
1041 show_fc_rport_##field (struct device *dev, \
1042 struct device_attribute *attr, char *buf) \
1043 { \
1044 struct fc_rport *rport = transport_class_to_rport(dev); \
1045 return snprintf(buf, sz, format_string, cast rport->field); \
1046 }
1047
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)
1052
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)
1057
1058
1059 #define fc_private_rport_rd_enum_attr(title, maxlen) \
1060 static ssize_t \
1061 show_fc_rport_##title (struct device *dev, \
1062 struct device_attribute *attr, char *buf) \
1063 { \
1064 struct fc_rport *rport = transport_class_to_rport(dev); \
1065 const char *name; \
1066 name = get_fc_##title##_name(rport->title); \
1067 if (!name) \
1068 return -EINVAL; \
1069 return snprintf(buf, maxlen, "%s\n", name); \
1070 } \
1071 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
1072 show_fc_rport_##title, NULL)
1073
1074
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) \
1081 count++
1082
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]; \
1088 count++
1089
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; \
1095 } \
1096 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
1097 if (i->f->show_rport_##field) \
1098 count++
1099
1100 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
1101 { \
1102 i->private_rport_attrs[count] = device_attr_rport_##field; \
1103 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
1104 count++; \
1105 }
1106
1107
1108 /* The FC Transport Remote Port Attributes: */
1109
1110 /* Fixed Remote Port Attributes */
1111
1112 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
1113
1114 static ssize_t
show_fc_rport_supported_classes(struct device * dev,struct device_attribute * attr,char * buf)1115 show_fc_rport_supported_classes (struct device *dev,
1116 struct device_attribute *attr, char *buf)
1117 {
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);
1122 }
1123 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
1124 show_fc_rport_supported_classes, NULL);
1125
1126 /* Dynamic Remote Port Attributes */
1127
1128 /*
1129 * dev_loss_tmo attribute
1130 */
fc_str_to_dev_loss(const char * buf,unsigned long * val)1131 static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
1132 {
1133 char *cp;
1134
1135 *val = simple_strtoul(buf, &cp, 0);
1136 if (*cp && (*cp != '\n'))
1137 return -EINVAL;
1138 /*
1139 * Check for overflow; dev_loss_tmo is u32
1140 */
1141 if (*val > UINT_MAX)
1142 return -EINVAL;
1143
1144 return 0;
1145 }
1146
fc_rport_set_dev_loss_tmo(struct fc_rport * rport,unsigned long val)1147 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
1148 unsigned long val)
1149 {
1150 struct Scsi_Host *shost = rport_to_shost(rport);
1151 struct fc_internal *i = to_fc_internal(shost->transportt);
1152
1153 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
1154 (rport->port_state == FC_PORTSTATE_DELETED) ||
1155 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
1156 return -EBUSY;
1157 /*
1158 * Check for overflow; dev_loss_tmo is u32
1159 */
1160 if (val > UINT_MAX)
1161 return -EINVAL;
1162
1163 /*
1164 * If fast_io_fail is off we have to cap
1165 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
1166 */
1167 if (rport->fast_io_fail_tmo == -1 &&
1168 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
1169 return -EINVAL;
1170
1171 i->f->set_rport_dev_loss_tmo(rport, val);
1172 return 0;
1173 }
1174
1175 fc_rport_show_function(dev_loss_tmo, "%u\n", 20, )
1176 static ssize_t
store_fc_rport_dev_loss_tmo(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1177 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
1178 const char *buf, size_t count)
1179 {
1180 struct fc_rport *rport = transport_class_to_rport(dev);
1181 unsigned long val;
1182 int rc;
1183
1184 rc = fc_str_to_dev_loss(buf, &val);
1185 if (rc)
1186 return rc;
1187
1188 rc = fc_rport_set_dev_loss_tmo(rport, val);
1189 if (rc)
1190 return rc;
1191 return count;
1192 }
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);
1195
1196
1197 /* Private Remote Port Attributes */
1198
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);
1202
1203 static ssize_t
show_fc_rport_roles(struct device * dev,struct device_attribute * attr,char * buf)1204 show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
1205 char *buf)
1206 {
1207 struct fc_rport *rport = transport_class_to_rport(dev);
1208
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");
1224 default:
1225 return snprintf(buf, 30, "Unknown Fabric Entity\n");
1226 }
1227 } else {
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);
1231 }
1232 }
1233 static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
1234 show_fc_rport_roles, NULL);
1235
fc_rport_set_marginal_state(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1236 static ssize_t fc_rport_set_marginal_state(struct device *dev,
1237 struct device_attribute *attr,
1238 const char *buf, size_t count)
1239 {
1240 struct fc_rport *rport = transport_class_to_rport(dev);
1241 enum fc_port_state port_state;
1242 int ret = 0;
1243
1244 ret = get_fc_port_state_match(buf, &port_state);
1245 if (ret)
1246 return -EINVAL;
1247 if (port_state == FC_PORTSTATE_MARGINAL) {
1248 /*
1249 * Change the state to Marginal only if the
1250 * current rport state is Online
1251 * Allow only Online->Marginal
1252 */
1253 if (rport->port_state == FC_PORTSTATE_ONLINE)
1254 rport->port_state = port_state;
1255 else
1256 return -EINVAL;
1257 } else if (port_state == FC_PORTSTATE_ONLINE) {
1258 /*
1259 * Change the state to Online only if the
1260 * current rport state is Marginal
1261 * Allow only Marginal->Online
1262 */
1263 if (rport->port_state == FC_PORTSTATE_MARGINAL)
1264 rport->port_state = port_state;
1265 else
1266 return -EINVAL;
1267 } else
1268 return -EINVAL;
1269 return count;
1270 }
1271
1272 static ssize_t
show_fc_rport_port_state(struct device * dev,struct device_attribute * attr,char * buf)1273 show_fc_rport_port_state(struct device *dev,
1274 struct device_attribute *attr, char *buf)
1275 {
1276 const char *name;
1277 struct fc_rport *rport = transport_class_to_rport(dev);
1278
1279 name = get_fc_port_state_name(rport->port_state);
1280 if (!name)
1281 return -EINVAL;
1282
1283 return snprintf(buf, 20, "%s\n", name);
1284 }
1285
1286 static FC_DEVICE_ATTR(rport, port_state, 0444 | 0200,
1287 show_fc_rport_port_state, fc_rport_set_marginal_state);
1288
1289 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
1290
1291 /*
1292 * fast_io_fail_tmo attribute
1293 */
1294 static ssize_t
show_fc_rport_fast_io_fail_tmo(struct device * dev,struct device_attribute * attr,char * buf)1295 show_fc_rport_fast_io_fail_tmo (struct device *dev,
1296 struct device_attribute *attr, char *buf)
1297 {
1298 struct fc_rport *rport = transport_class_to_rport(dev);
1299
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);
1303 }
1304
1305 static ssize_t
store_fc_rport_fast_io_fail_tmo(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1306 store_fc_rport_fast_io_fail_tmo(struct device *dev,
1307 struct device_attribute *attr, const char *buf,
1308 size_t count)
1309 {
1310 int val;
1311 char *cp;
1312 struct fc_rport *rport = transport_class_to_rport(dev);
1313
1314 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
1315 (rport->port_state == FC_PORTSTATE_DELETED) ||
1316 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
1317 return -EBUSY;
1318 if (strncmp(buf, "off", 3) == 0)
1319 rport->fast_io_fail_tmo = -1;
1320 else {
1321 val = simple_strtoul(buf, &cp, 0);
1322 if ((*cp && (*cp != '\n')) || (val < 0))
1323 return -EINVAL;
1324 /*
1325 * Cap fast_io_fail by dev_loss_tmo or
1326 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
1327 */
1328 if ((val >= rport->dev_loss_tmo) ||
1329 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
1330 return -EINVAL;
1331
1332 rport->fast_io_fail_tmo = val;
1333 }
1334 return count;
1335 }
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);
1338
1339 #define fc_rport_fpin_statistic(name) \
1340 static ssize_t fc_rport_fpinstat_##name(struct device *cd, \
1341 struct device_attribute *attr, \
1342 char *buf) \
1343 { \
1344 struct fc_rport *rport = transport_class_to_rport(cd); \
1345 \
1346 return snprintf(buf, 20, "0x%llx\n", rport->fpin_stats.name); \
1347 } \
1348 static FC_DEVICE_ATTR(rport, fpin_##name, 0444, fc_rport_fpinstat_##name, NULL)
1349
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);
1370
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,
1392 NULL
1393 };
1394
1395 static struct attribute_group fc_rport_statistics_group = {
1396 .name = "statistics",
1397 .attrs = fc_rport_statistics_attrs,
1398 };
1399
1400
1401 /*
1402 * FC SCSI Target Attribute Management
1403 */
1404
1405 /*
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.
1410 */
1411 #define fc_starget_show_function(field, format_string, sz, cast) \
1412 static ssize_t \
1413 show_fc_starget_##field (struct device *dev, \
1414 struct device_attribute *attr, char *buf) \
1415 { \
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); \
1420 if (rport) \
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)); \
1426 }
1427
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)
1432
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)
1437
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) \
1444 count++
1445
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; \
1451 } \
1452 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1453 if (i->f->show_starget_##field) \
1454 count++
1455
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);
1460
1461
1462 /*
1463 * FC Virtual Port Attribute Management
1464 */
1465
1466 #define fc_vport_show_function(field, format_string, sz, cast) \
1467 static ssize_t \
1468 show_fc_vport_##field (struct device *dev, \
1469 struct device_attribute *attr, char *buf) \
1470 { \
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); \
1478 }
1479
1480 #define fc_vport_store_function(field) \
1481 static ssize_t \
1482 store_fc_vport_##field(struct device *dev, \
1483 struct device_attribute *attr, \
1484 const char *buf, size_t count) \
1485 { \
1486 int val; \
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); \
1490 char *cp; \
1491 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1492 return -EBUSY; \
1493 val = simple_strtoul(buf, &cp, 0); \
1494 if (*cp && (*cp != '\n')) \
1495 return -EINVAL; \
1496 i->f->set_vport_##field(vport, val); \
1497 return count; \
1498 }
1499
1500 #define fc_vport_store_str_function(field, slen) \
1501 static ssize_t \
1502 store_fc_vport_##field(struct device *dev, \
1503 struct device_attribute *attr, \
1504 const char *buf, size_t count) \
1505 { \
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; \
1510 \
1511 /* count may include a LF at end of string */ \
1512 if (buf[cnt-1] == '\n') \
1513 cnt--; \
1514 if (cnt > ((slen) - 1)) \
1515 return -EINVAL; \
1516 memcpy(vport->field, buf, cnt); \
1517 i->f->set_vport_##field(vport); \
1518 return count; \
1519 }
1520
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)
1525
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)
1530
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)
1537
1538 #define fc_private_vport_show_function(field, format_string, sz, cast) \
1539 static ssize_t \
1540 show_fc_vport_##field (struct device *dev, \
1541 struct device_attribute *attr, char *buf) \
1542 { \
1543 struct fc_vport *vport = transport_class_to_vport(dev); \
1544 return snprintf(buf, sz, format_string, cast vport->field); \
1545 }
1546
1547 #define fc_private_vport_store_u32_function(field) \
1548 static ssize_t \
1549 store_fc_vport_##field(struct device *dev, \
1550 struct device_attribute *attr, \
1551 const char *buf, size_t count) \
1552 { \
1553 u32 val; \
1554 struct fc_vport *vport = transport_class_to_vport(dev); \
1555 char *cp; \
1556 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1557 return -EBUSY; \
1558 val = simple_strtoul(buf, &cp, 0); \
1559 if (*cp && (*cp != '\n')) \
1560 return -EINVAL; \
1561 vport->field = val; \
1562 return count; \
1563 }
1564
1565
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)
1570
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)
1575
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)
1582
1583
1584 #define fc_private_vport_rd_enum_attr(title, maxlen) \
1585 static ssize_t \
1586 show_fc_vport_##title (struct device *dev, \
1587 struct device_attribute *attr, \
1588 char *buf) \
1589 { \
1590 struct fc_vport *vport = transport_class_to_vport(dev); \
1591 const char *name; \
1592 name = get_fc_##title##_name(vport->title); \
1593 if (!name) \
1594 return -EINVAL; \
1595 return snprintf(buf, maxlen, "%s\n", name); \
1596 } \
1597 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
1598 show_fc_vport_##title, NULL)
1599
1600
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) \
1607 count++
1608 /* NOTE: Above MACRO differs: checks function not show bit */
1609
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]; \
1615 count++
1616
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]; \
1620 if (i->f->field) \
1621 count++
1622 /* NOTE: Above MACRO differs: checks function */
1623
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; \
1629 } \
1630 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1631 count++
1632 /* NOTE: Above MACRO differs: does not check show bit */
1633
1634 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1635 { \
1636 i->private_vport_attrs[count] = device_attr_vport_##field; \
1637 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1638 count++; \
1639 }
1640
1641
1642 /* The FC Transport Virtual Port Attributes: */
1643
1644 /* Fixed Virtual Port Attributes */
1645
1646 /* Dynamic Virtual Port Attributes */
1647
1648 /* Private Virtual Port Attributes */
1649
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);
1654
1655 static ssize_t
show_fc_vport_roles(struct device * dev,struct device_attribute * attr,char * buf)1656 show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1657 char *buf)
1658 {
1659 struct fc_vport *vport = transport_class_to_vport(dev);
1660
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);
1664 }
1665 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1666
1667 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1668
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);
1674
1675 static ssize_t
store_fc_vport_delete(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1676 store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1677 const char *buf, size_t count)
1678 {
1679 struct fc_vport *vport = transport_class_to_vport(dev);
1680 struct Scsi_Host *shost = vport_to_shost(vport);
1681 unsigned long flags;
1682
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);
1686 return -EBUSY;
1687 }
1688 vport->flags |= FC_VPORT_DELETING;
1689 spin_unlock_irqrestore(shost->host_lock, flags);
1690
1691 fc_queue_work(shost, &vport->vport_delete_work);
1692 return count;
1693 }
1694 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1695 NULL, store_fc_vport_delete);
1696
1697
1698 /*
1699 * Enable/Disable vport
1700 * Write "1" to disable, write "0" to enable
1701 */
1702 static ssize_t
store_fc_vport_disable(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1703 store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1704 const char *buf,
1705 size_t count)
1706 {
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);
1710 int stat;
1711
1712 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1713 return -EBUSY;
1714
1715 if (*buf == '0') {
1716 if (vport->vport_state != FC_VPORT_DISABLED)
1717 return -EALREADY;
1718 } else if (*buf == '1') {
1719 if (vport->vport_state == FC_VPORT_DISABLED)
1720 return -EALREADY;
1721 } else
1722 return -EINVAL;
1723
1724 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1725 return stat ? stat : count;
1726 }
1727 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1728 NULL, store_fc_vport_disable);
1729
1730
1731 /*
1732 * Host Attribute Management
1733 */
1734
1735 #define fc_host_show_function(field, format_string, sz, cast) \
1736 static ssize_t \
1737 show_fc_host_##field (struct device *dev, \
1738 struct device_attribute *attr, char *buf) \
1739 { \
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)); \
1745 }
1746
1747 #define fc_host_store_function(field) \
1748 static ssize_t \
1749 store_fc_host_##field(struct device *dev, \
1750 struct device_attribute *attr, \
1751 const char *buf, size_t count) \
1752 { \
1753 int val; \
1754 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1755 struct fc_internal *i = to_fc_internal(shost->transportt); \
1756 char *cp; \
1757 \
1758 val = simple_strtoul(buf, &cp, 0); \
1759 if (*cp && (*cp != '\n')) \
1760 return -EINVAL; \
1761 i->f->set_host_##field(shost, val); \
1762 return count; \
1763 }
1764
1765 #define fc_host_store_str_function(field, slen) \
1766 static ssize_t \
1767 store_fc_host_##field(struct device *dev, \
1768 struct device_attribute *attr, \
1769 const char *buf, size_t count) \
1770 { \
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; \
1774 \
1775 /* count may include a LF at end of string */ \
1776 if (buf[cnt-1] == '\n') \
1777 cnt--; \
1778 if (cnt > ((slen) - 1)) \
1779 return -EINVAL; \
1780 memcpy(fc_host_##field(shost), buf, cnt); \
1781 i->f->set_host_##field(shost); \
1782 return count; \
1783 }
1784
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)
1789
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)
1794
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)
1801
1802 #define fc_host_rd_enum_attr(title, maxlen) \
1803 static ssize_t \
1804 show_fc_host_##title (struct device *dev, \
1805 struct device_attribute *attr, char *buf) \
1806 { \
1807 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1808 struct fc_internal *i = to_fc_internal(shost->transportt); \
1809 const char *name; \
1810 if (i->f->get_host_##title) \
1811 i->f->get_host_##title(shost); \
1812 name = get_fc_##title##_name(fc_host_##title(shost)); \
1813 if (!name) \
1814 return -EINVAL; \
1815 return snprintf(buf, maxlen, "%s\n", name); \
1816 } \
1817 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1818
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) \
1825 count++
1826
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]; \
1832 count++
1833
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; \
1839 } \
1840 i->host_attrs[count] = &i->private_host_attrs[count]; \
1841 if (i->f->show_host_##field) \
1842 count++
1843
1844
1845 #define fc_private_host_show_function(field, format_string, sz, cast) \
1846 static ssize_t \
1847 show_fc_host_##field (struct device *dev, \
1848 struct device_attribute *attr, char *buf) \
1849 { \
1850 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1851 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1852 }
1853
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)
1858
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)
1863
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]; \
1869 count++
1870
1871 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
1872 { \
1873 i->private_host_attrs[count] = device_attr_host_##field; \
1874 i->host_attrs[count] = &i->private_host_attrs[count]; \
1875 count++; \
1876 }
1877
1878
1879 /* Fixed Host Attributes */
1880
1881 static ssize_t
show_fc_host_supported_classes(struct device * dev,struct device_attribute * attr,char * buf)1882 show_fc_host_supported_classes (struct device *dev,
1883 struct device_attribute *attr, char *buf)
1884 {
1885 struct Scsi_Host *shost = transport_class_to_shost(dev);
1886
1887 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1888 return snprintf(buf, 20, "unspecified\n");
1889
1890 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1891 }
1892 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1893 show_fc_host_supported_classes, NULL);
1894
1895 static ssize_t
show_fc_host_supported_fc4s(struct device * dev,struct device_attribute * attr,char * buf)1896 show_fc_host_supported_fc4s (struct device *dev,
1897 struct device_attribute *attr, char *buf)
1898 {
1899 struct Scsi_Host *shost = transport_class_to_shost(dev);
1900 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1901 }
1902 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1903 show_fc_host_supported_fc4s, NULL);
1904
1905 static ssize_t
show_fc_host_supported_speeds(struct device * dev,struct device_attribute * attr,char * buf)1906 show_fc_host_supported_speeds (struct device *dev,
1907 struct device_attribute *attr, char *buf)
1908 {
1909 struct Scsi_Host *shost = transport_class_to_shost(dev);
1910
1911 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1912 return snprintf(buf, 20, "unknown\n");
1913
1914 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1915 }
1916 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1917 show_fc_host_supported_speeds, NULL);
1918
1919
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);
1934
1935
1936 /* Dynamic Host Attributes */
1937
1938 static ssize_t
show_fc_host_active_fc4s(struct device * dev,struct device_attribute * attr,char * buf)1939 show_fc_host_active_fc4s (struct device *dev,
1940 struct device_attribute *attr, char *buf)
1941 {
1942 struct Scsi_Host *shost = transport_class_to_shost(dev);
1943 struct fc_internal *i = to_fc_internal(shost->transportt);
1944
1945 if (i->f->get_host_active_fc4s)
1946 i->f->get_host_active_fc4s(shost);
1947
1948 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1949 }
1950 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1951 show_fc_host_active_fc4s, NULL);
1952
1953 static ssize_t
show_fc_host_speed(struct device * dev,struct device_attribute * attr,char * buf)1954 show_fc_host_speed (struct device *dev,
1955 struct device_attribute *attr, char *buf)
1956 {
1957 struct Scsi_Host *shost = transport_class_to_shost(dev);
1958 struct fc_internal *i = to_fc_internal(shost->transportt);
1959
1960 if (i->f->get_host_speed)
1961 i->f->get_host_speed(shost);
1962
1963 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1964 return snprintf(buf, 20, "unknown\n");
1965
1966 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1967 }
1968 static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1969 show_fc_host_speed, NULL);
1970
1971
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);
1977
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);
1983
1984
1985 /* Private Host Attributes */
1986
1987 static ssize_t
show_fc_private_host_tgtid_bind_type(struct device * dev,struct device_attribute * attr,char * buf)1988 show_fc_private_host_tgtid_bind_type(struct device *dev,
1989 struct device_attribute *attr, char *buf)
1990 {
1991 struct Scsi_Host *shost = transport_class_to_shost(dev);
1992 const char *name;
1993
1994 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1995 if (!name)
1996 return -EINVAL;
1997 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1998 }
1999
2000 #define get_list_head_entry(pos, head, member) \
2001 pos = list_entry((head)->next, typeof(*pos), member)
2002
2003 static ssize_t
store_fc_private_host_tgtid_bind_type(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2004 store_fc_private_host_tgtid_bind_type(struct device *dev,
2005 struct device_attribute *attr, const char *buf, size_t count)
2006 {
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;
2011
2012 if (get_fc_tgtid_bind_type_match(buf, &val))
2013 return -EINVAL;
2014
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);
2024 }
2025 spin_unlock_irqrestore(shost->host_lock, flags);
2026 }
2027
2028 fc_host_tgtid_bind_type(shost) = val;
2029 return count;
2030 }
2031
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);
2035
2036 static ssize_t
store_fc_private_host_issue_lip(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2037 store_fc_private_host_issue_lip(struct device *dev,
2038 struct device_attribute *attr, const char *buf, size_t count)
2039 {
2040 struct Scsi_Host *shost = transport_class_to_shost(dev);
2041 struct fc_internal *i = to_fc_internal(shost->transportt);
2042 int ret;
2043
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;
2048 }
2049
2050 return -ENOENT;
2051 }
2052
2053 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
2054 store_fc_private_host_issue_lip);
2055
2056 static ssize_t
store_fc_private_host_dev_loss_tmo(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2057 store_fc_private_host_dev_loss_tmo(struct device *dev,
2058 struct device_attribute *attr,
2059 const char *buf, size_t count)
2060 {
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;
2065 int rc;
2066
2067 rc = fc_str_to_dev_loss(buf, &val);
2068 if (rc)
2069 return rc;
2070
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);
2076 return count;
2077 }
2078
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);
2083
2084 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
2085
2086 /*
2087 * Host Statistics Management
2088 */
2089
2090 /* Show a given attribute in the statistics group */
2091 static ssize_t
fc_stat_show(const struct device * dev,char * buf,unsigned long offset)2092 fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
2093 {
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;
2098
2099 if (offset > sizeof(struct fc_host_statistics) ||
2100 offset % sizeof(u64) != 0)
2101 WARN_ON(1);
2102
2103 if (i->f->get_fc_host_stats) {
2104 stats = (i->f->get_fc_host_stats)(shost);
2105 if (stats)
2106 ret = snprintf(buf, 20, "0x%llx\n",
2107 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
2108 }
2109 return ret;
2110 }
2111
2112
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, \
2117 char *buf) \
2118 { \
2119 return fc_stat_show(cd, buf, \
2120 offsetof(struct fc_host_statistics, name)); \
2121 } \
2122 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
2123
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);
2155
2156
2157 #define fc_host_fpin_statistic(name) \
2158 static ssize_t fc_host_fpinstat_##name(struct device *cd, \
2159 struct device_attribute *attr, \
2160 char *buf) \
2161 { \
2162 struct Scsi_Host *shost = transport_class_to_shost(cd); \
2163 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); \
2164 \
2165 return snprintf(buf, 20, "0x%llx\n", fc_host->fpin_stats.name); \
2166 } \
2167 static FC_DEVICE_ATTR(host, fpin_##name, 0444, fc_host_fpinstat_##name, NULL)
2168
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);
2189
2190 static ssize_t
fc_reset_statistics(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2191 fc_reset_statistics(struct device *dev, struct device_attribute *attr,
2192 const char *buf, size_t count)
2193 {
2194 struct Scsi_Host *shost = transport_class_to_shost(dev);
2195 struct fc_internal *i = to_fc_internal(shost->transportt);
2196
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);
2200 return count;
2201 }
2202
2203 return -ENOENT;
2204 }
2205 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
2206 fc_reset_statistics);
2207
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,
2261 NULL
2262 };
2263
2264 static struct attribute_group fc_statistics_group = {
2265 .name = "statistics",
2266 .attrs = fc_statistics_attrs,
2267 };
2268
2269
2270 /* Host Vport Attributes */
2271
2272 static int
fc_parse_wwn(const char * ns,u64 * nm)2273 fc_parse_wwn(const char *ns, u64 *nm)
2274 {
2275 unsigned int i, j;
2276 u8 wwn[8];
2277
2278 memset(wwn, 0, sizeof(wwn));
2279
2280 /* Validate and store the new name */
2281 for (i=0, j=0; i < 16; i++) {
2282 int value;
2283
2284 value = hex_to_bin(*ns++);
2285 if (value >= 0)
2286 j = (j << 4) | value;
2287 else
2288 return -EINVAL;
2289 if (i % 2) {
2290 wwn[i/2] = j & 0xff;
2291 j = 0;
2292 }
2293 }
2294
2295 *nm = wwn_to_u64(wwn);
2296
2297 return 0;
2298 }
2299
2300
2301 /*
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)
2306 */
2307 static ssize_t
store_fc_host_vport_create(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2308 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
2309 const char *buf, size_t count)
2310 {
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;
2315 int stat;
2316
2317 memset(&vid, 0, sizeof(vid));
2318
2319 /* count may include a LF at end of string */
2320 if (buf[cnt-1] == '\n')
2321 cnt--;
2322
2323 /* validate we have enough characters for WWPN */
2324 if ((cnt != (16+1+16)) || (buf[16] != ':'))
2325 return -EINVAL;
2326
2327 stat = fc_parse_wwn(&buf[0], &vid.port_name);
2328 if (stat)
2329 return stat;
2330
2331 stat = fc_parse_wwn(&buf[17], &vid.node_name);
2332 if (stat)
2333 return stat;
2334
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 */
2339
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;
2343 }
2344 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
2345 store_fc_host_vport_create);
2346
2347
2348 /*
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)
2353 */
2354 static ssize_t
store_fc_host_vport_delete(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2355 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
2356 const char *buf, size_t count)
2357 {
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;
2361 u64 wwpn, wwnn;
2362 unsigned long flags;
2363 unsigned int cnt=count;
2364 int stat, match;
2365
2366 /* count may include a LF at end of string */
2367 if (buf[cnt-1] == '\n')
2368 cnt--;
2369
2370 /* validate we have enough characters for WWPN */
2371 if ((cnt != (16+1+16)) || (buf[16] != ':'))
2372 return -EINVAL;
2373
2374 stat = fc_parse_wwn(&buf[0], &wwpn);
2375 if (stat)
2376 return stat;
2377
2378 stat = fc_parse_wwn(&buf[17], &wwnn);
2379 if (stat)
2380 return stat;
2381
2382 spin_lock_irqsave(shost->host_lock, flags);
2383 match = 0;
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))
2389 break;
2390 vport->flags |= FC_VPORT_DELETING;
2391 match = 1;
2392 break;
2393 }
2394 }
2395 spin_unlock_irqrestore(shost->host_lock, flags);
2396
2397 if (!match)
2398 return -ENODEV;
2399
2400 stat = fc_vport_terminate(vport);
2401 return stat ? stat : count;
2402 }
2403 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
2404 store_fc_host_vport_delete);
2405
2406
fc_host_match(struct attribute_container * cont,struct device * dev)2407 static int fc_host_match(struct attribute_container *cont,
2408 struct device *dev)
2409 {
2410 struct Scsi_Host *shost;
2411 struct fc_internal *i;
2412
2413 if (!scsi_is_host_device(dev))
2414 return 0;
2415
2416 shost = dev_to_shost(dev);
2417 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2418 != &fc_host_class.class)
2419 return 0;
2420
2421 i = to_fc_internal(shost->transportt);
2422
2423 return &i->t.host_attrs.ac == cont;
2424 }
2425
fc_target_match(struct attribute_container * cont,struct device * dev)2426 static int fc_target_match(struct attribute_container *cont,
2427 struct device *dev)
2428 {
2429 struct Scsi_Host *shost;
2430 struct fc_internal *i;
2431
2432 if (!scsi_is_target_device(dev))
2433 return 0;
2434
2435 shost = dev_to_shost(dev->parent);
2436 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2437 != &fc_host_class.class)
2438 return 0;
2439
2440 i = to_fc_internal(shost->transportt);
2441
2442 return &i->t.target_attrs.ac == cont;
2443 }
2444
fc_rport_dev_release(struct device * dev)2445 static void fc_rport_dev_release(struct device *dev)
2446 {
2447 struct fc_rport *rport = dev_to_rport(dev);
2448 put_device(dev->parent);
2449 kfree(rport);
2450 }
2451
scsi_is_fc_rport(const struct device * dev)2452 int scsi_is_fc_rport(const struct device *dev)
2453 {
2454 return dev->release == fc_rport_dev_release;
2455 }
2456 EXPORT_SYMBOL(scsi_is_fc_rport);
2457
fc_rport_match(struct attribute_container * cont,struct device * dev)2458 static int fc_rport_match(struct attribute_container *cont,
2459 struct device *dev)
2460 {
2461 struct Scsi_Host *shost;
2462 struct fc_internal *i;
2463
2464 if (!scsi_is_fc_rport(dev))
2465 return 0;
2466
2467 shost = dev_to_shost(dev->parent);
2468 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2469 != &fc_host_class.class)
2470 return 0;
2471
2472 i = to_fc_internal(shost->transportt);
2473
2474 return &i->rport_attr_cont.ac == cont;
2475 }
2476
2477
fc_vport_dev_release(struct device * dev)2478 static void fc_vport_dev_release(struct device *dev)
2479 {
2480 struct fc_vport *vport = dev_to_vport(dev);
2481 put_device(dev->parent); /* release kobj parent */
2482 kfree(vport);
2483 }
2484
scsi_is_fc_vport(const struct device * dev)2485 static int scsi_is_fc_vport(const struct device *dev)
2486 {
2487 return dev->release == fc_vport_dev_release;
2488 }
2489
fc_vport_match(struct attribute_container * cont,struct device * dev)2490 static int fc_vport_match(struct attribute_container *cont,
2491 struct device *dev)
2492 {
2493 struct fc_vport *vport;
2494 struct Scsi_Host *shost;
2495 struct fc_internal *i;
2496
2497 if (!scsi_is_fc_vport(dev))
2498 return 0;
2499 vport = dev_to_vport(dev);
2500
2501 shost = vport_to_shost(vport);
2502 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2503 != &fc_host_class.class)
2504 return 0;
2505
2506 i = to_fc_internal(shost->transportt);
2507 return &i->vport_attr_cont.ac == cont;
2508 }
2509
2510
2511 /**
2512 * fc_eh_timed_out - FC Transport I/O timeout intercept handler
2513 * @scmd: The SCSI command which timed out
2514 *
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.
2522 *
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.
2529 *
2530 * Notes:
2531 * This routine assumes no locks are held on entry.
2532 */
2533 enum blk_eh_timer_return
fc_eh_timed_out(struct scsi_cmnd * scmd)2534 fc_eh_timed_out(struct scsi_cmnd *scmd)
2535 {
2536 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2537
2538 if (rport->port_state == FC_PORTSTATE_BLOCKED)
2539 return BLK_EH_RESET_TIMER;
2540
2541 return BLK_EH_DONE;
2542 }
2543 EXPORT_SYMBOL(fc_eh_timed_out);
2544
2545 /*
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()
2548 * on the rport.
2549 */
2550 static void
fc_user_scan_tgt(struct Scsi_Host * shost,uint channel,uint id,u64 lun)2551 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2552 {
2553 struct fc_rport *rport;
2554 unsigned long flags;
2555
2556 spin_lock_irqsave(shost->host_lock, flags);
2557
2558 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2559 if (rport->scsi_target_id == -1)
2560 continue;
2561
2562 if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
2563 (rport->port_state != FC_PORTSTATE_MARGINAL))
2564 continue;
2565
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,
2570 SCSI_SCAN_MANUAL);
2571 return;
2572 }
2573 }
2574
2575 spin_unlock_irqrestore(shost->host_lock, flags);
2576 }
2577
2578 /*
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.
2583 */
2584 static int
fc_user_scan(struct Scsi_Host * shost,uint channel,uint id,u64 lun)2585 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2586 {
2587 uint chlo, chhi;
2588 uint tgtlo, tgthi;
2589
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)))
2593 return -EINVAL;
2594
2595 if (channel == SCAN_WILD_CARD) {
2596 chlo = 0;
2597 chhi = shost->max_channel + 1;
2598 } else {
2599 chlo = channel;
2600 chhi = channel + 1;
2601 }
2602
2603 if (id == SCAN_WILD_CARD) {
2604 tgtlo = 0;
2605 tgthi = shost->max_id;
2606 } else {
2607 tgtlo = id;
2608 tgthi = id + 1;
2609 }
2610
2611 for ( ; chlo < chhi; chlo++)
2612 for ( ; tgtlo < tgthi; tgtlo++)
2613 fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2614
2615 return 0;
2616 }
2617
2618 struct scsi_transport_template *
fc_attach_transport(struct fc_function_template * ft)2619 fc_attach_transport(struct fc_function_template *ft)
2620 {
2621 int count;
2622 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2623 GFP_KERNEL);
2624
2625 if (unlikely(!i))
2626 return NULL;
2627
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);
2633
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);
2641
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);
2647
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);
2652
2653 i->f = ft;
2654
2655 /* Transport uses the shost workq for scsi scanning */
2656 i->t.create_work_queue = 1;
2657
2658 i->t.user_scan = fc_user_scan;
2659
2660 /*
2661 * Setup SCSI Target Attributes.
2662 */
2663 count = 0;
2664 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2665 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2666 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2667
2668 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2669
2670 i->starget_attrs[count] = NULL;
2671
2672
2673 /*
2674 * Setup SCSI Host Attributes.
2675 */
2676 count=0;
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);
2687 }
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);
2696
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);
2705
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);
2715
2716 BUG_ON(count > FC_HOST_NUM_ATTRS);
2717
2718 i->host_attrs[count] = NULL;
2719
2720 /*
2721 * Setup Remote Port Attributes.
2722 */
2723 count=0;
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);
2734
2735 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2736
2737 i->rport_attrs[count] = NULL;
2738
2739 /*
2740 * Setup Virtual Port Attributes.
2741 */
2742 count=0;
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);
2752
2753 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2754
2755 i->vport_attrs[count] = NULL;
2756
2757 return &i->t;
2758 }
2759 EXPORT_SYMBOL(fc_attach_transport);
2760
fc_release_transport(struct scsi_transport_template * t)2761 void fc_release_transport(struct scsi_transport_template *t)
2762 {
2763 struct fc_internal *i = to_fc_internal(t);
2764
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);
2769
2770 kfree(i);
2771 }
2772 EXPORT_SYMBOL(fc_release_transport);
2773
2774 /**
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.
2778 *
2779 * Return value:
2780 * 1 - work queued for execution
2781 * 0 - work is already queued
2782 * -EINVAL - work queue doesn't exist
2783 */
2784 static int
fc_queue_work(struct Scsi_Host * shost,struct work_struct * work)2785 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2786 {
2787 if (unlikely(!fc_host_work_q(shost))) {
2788 printk(KERN_ERR
2789 "ERROR: FC host '%s' attempted to queue work, "
2790 "when no workqueue created.\n", shost->hostt->name);
2791 dump_stack();
2792
2793 return -EINVAL;
2794 }
2795
2796 return queue_work(fc_host_work_q(shost), work);
2797 }
2798
2799 /**
2800 * fc_flush_work - Flush a fc_host's workqueue.
2801 * @shost: Pointer to Scsi_Host bound to fc_host.
2802 */
2803 static void
fc_flush_work(struct Scsi_Host * shost)2804 fc_flush_work(struct Scsi_Host *shost)
2805 {
2806 if (!fc_host_work_q(shost)) {
2807 printk(KERN_ERR
2808 "ERROR: FC host '%s' attempted to flush work, "
2809 "when no workqueue created.\n", shost->hostt->name);
2810 dump_stack();
2811 return;
2812 }
2813
2814 flush_workqueue(fc_host_work_q(shost));
2815 }
2816
2817 /**
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
2822 *
2823 * Return value:
2824 * 1 on success / 0 already queued / < 0 for error
2825 */
2826 static int
fc_queue_devloss_work(struct Scsi_Host * shost,struct delayed_work * work,unsigned long delay)2827 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2828 unsigned long delay)
2829 {
2830 if (unlikely(!fc_host_devloss_work_q(shost))) {
2831 printk(KERN_ERR
2832 "ERROR: FC host '%s' attempted to queue work, "
2833 "when no workqueue created.\n", shost->hostt->name);
2834 dump_stack();
2835
2836 return -EINVAL;
2837 }
2838
2839 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2840 }
2841
2842 /**
2843 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2844 * @shost: Pointer to Scsi_Host bound to fc_host.
2845 */
2846 static void
fc_flush_devloss(struct Scsi_Host * shost)2847 fc_flush_devloss(struct Scsi_Host *shost)
2848 {
2849 if (!fc_host_devloss_work_q(shost)) {
2850 printk(KERN_ERR
2851 "ERROR: FC host '%s' attempted to flush work, "
2852 "when no workqueue created.\n", shost->hostt->name);
2853 dump_stack();
2854 return;
2855 }
2856
2857 flush_workqueue(fc_host_devloss_work_q(shost));
2858 }
2859
2860
2861 /**
2862 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2863 * @shost: Which &Scsi_Host
2864 *
2865 * This routine is expected to be called immediately preceding the
2866 * a driver's call to scsi_remove_host().
2867 *
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 !!!
2872 *
2873 * Notes:
2874 * This routine assumes no locks are held on entry.
2875 */
2876 void
fc_remove_host(struct Scsi_Host * shost)2877 fc_remove_host(struct Scsi_Host *shost)
2878 {
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;
2884
2885 spin_lock_irqsave(shost->host_lock, flags);
2886
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);
2891 }
2892
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);
2899 }
2900
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);
2906 }
2907
2908 spin_unlock_irqrestore(shost->host_lock, flags);
2909
2910 /* flush all scan work items */
2911 scsi_flush_work(shost);
2912
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);
2918 }
2919
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);
2925 }
2926 }
2927 EXPORT_SYMBOL(fc_remove_host);
2928
fc_terminate_rport_io(struct fc_rport * rport)2929 static void fc_terminate_rport_io(struct fc_rport *rport)
2930 {
2931 struct Scsi_Host *shost = rport_to_shost(rport);
2932 struct fc_internal *i = to_fc_internal(shost->transportt);
2933
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);
2937
2938 /*
2939 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
2940 */
2941 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
2942 }
2943
2944 /**
2945 * fc_starget_delete - called to delete the scsi descendants of an rport
2946 * @work: remote port to be operated on.
2947 *
2948 * Deletes target and all sdevs.
2949 */
2950 static void
fc_starget_delete(struct work_struct * work)2951 fc_starget_delete(struct work_struct *work)
2952 {
2953 struct fc_rport *rport =
2954 container_of(work, struct fc_rport, stgt_delete_work);
2955
2956 fc_terminate_rport_io(rport);
2957 scsi_remove_target(&rport->dev);
2958 }
2959
2960
2961 /**
2962 * fc_rport_final_delete - finish rport termination and delete it.
2963 * @work: remote port to be deleted.
2964 */
2965 static void
fc_rport_final_delete(struct work_struct * work)2966 fc_rport_final_delete(struct work_struct *work)
2967 {
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;
2975
2976 fc_terminate_rport_io(rport);
2977
2978 /*
2979 * if a scan is pending, flush the SCSI Host work_q so that
2980 * that we can reclaim the rport scan work element.
2981 */
2982 if (rport->flags & FC_RPORT_SCAN_PENDING)
2983 scsi_flush_work(shost);
2984
2985 /*
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
2989 */
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;
3000 }
3001 spin_unlock_irqrestore(shost->host_lock, flags);
3002
3003 /* Delete SCSI target and sdevs */
3004 if (rport->scsi_target_id != -1)
3005 fc_starget_delete(&rport->stgt_delete_work);
3006
3007 /*
3008 * Notify the driver that the rport is now dead. The LLDD will
3009 * also guarantee that any communication to the rport is terminated
3010 *
3011 * Avoid this call if we already called it when we preserved the
3012 * rport for the binding.
3013 */
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;
3018 do_callback = 1;
3019 }
3020 spin_unlock_irqrestore(shost->host_lock, flags);
3021
3022 if (do_callback)
3023 i->f->dev_loss_tmo_callbk(rport);
3024
3025 fc_bsg_remove(rport->rqst_q);
3026
3027 transport_remove_device(dev);
3028 device_del(dev);
3029 transport_destroy_device(dev);
3030 scsi_host_put(shost); /* for fc_host->rport list */
3031 put_device(dev); /* for self-reference */
3032 }
3033
3034
3035 /**
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.
3041 *
3042 * Allocates and creates the remoter port structure, including the
3043 * class and sysfs creation.
3044 *
3045 * Notes:
3046 * This routine assumes no locks are held on entry.
3047 */
3048 static struct fc_rport *
fc_remote_port_create(struct Scsi_Host * shost,int channel,struct fc_rport_identifiers * ids)3049 fc_remote_port_create(struct Scsi_Host *shost, int channel,
3050 struct fc_rport_identifiers *ids)
3051 {
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;
3055 struct device *dev;
3056 unsigned long flags;
3057 int error;
3058 size_t size;
3059
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__);
3064 return NULL;
3065 }
3066
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;
3079
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);
3085
3086 spin_lock_irqsave(shost->host_lock, flags);
3087
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++;
3092 else
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 */
3096
3097 spin_unlock_irqrestore(shost->host_lock, flags);
3098
3099 dev = &rport->dev;
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);
3106
3107 error = device_add(dev);
3108 if (error) {
3109 printk(KERN_ERR "FC Remote Port device_add failed\n");
3110 goto delete_rport;
3111 }
3112 transport_add_device(dev);
3113 transport_configure_device(dev);
3114
3115 fc_bsg_rportadd(shost, rport);
3116 /* ignore any bsg add error - we just can't do sgio */
3117
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);
3122 }
3123
3124 return rport;
3125
3126 delete_rport:
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);
3133 kfree(rport);
3134 return NULL;
3135 }
3136
3137 /**
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.
3143 *
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.
3148 *
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.
3160 *
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.
3166 *
3167 * Whenever a remote port is allocated, a new fc_remote_port class
3168 * device is created.
3169 *
3170 * Should not be called from interrupt context.
3171 *
3172 * Notes:
3173 * This routine assumes no locks are held on entry.
3174 */
3175 struct fc_rport *
fc_remote_port_add(struct Scsi_Host * shost,int channel,struct fc_rport_identifiers * ids)3176 fc_remote_port_add(struct Scsi_Host *shost, int channel,
3177 struct fc_rport_identifiers *ids)
3178 {
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;
3183 int match = 0;
3184
3185 /* ensure any stgt delete functions are done */
3186 fc_flush_work(shost);
3187
3188 /*
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.
3192 */
3193 spin_lock_irqsave(shost->host_lock, flags);
3194
3195 list_for_each_entry(rport, &fc_host->rports, peers) {
3196
3197 if ((rport->port_state == FC_PORTSTATE_BLOCKED ||
3198 rport->port_state == FC_PORTSTATE_NOTPRESENT) &&
3199 (rport->channel == channel)) {
3200
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)
3205 match = 1;
3206 break;
3207 case FC_TGTID_BIND_BY_WWNN:
3208 if (rport->node_name == ids->node_name)
3209 match = 1;
3210 break;
3211 case FC_TGTID_BIND_BY_ID:
3212 if (rport->port_id == ids->port_id)
3213 match = 1;
3214 break;
3215 }
3216
3217 if (match) {
3218
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;
3224
3225 rport->port_state = FC_PORTSTATE_ONLINE;
3226 rport->roles = ids->roles;
3227
3228 spin_unlock_irqrestore(shost->host_lock, flags);
3229
3230 if (fci->f->dd_fcrport_size)
3231 memset(rport->dd_data, 0,
3232 fci->f->dd_fcrport_size);
3233
3234 /*
3235 * If we were not a target, cancel the
3236 * io terminate and rport timers, and
3237 * we're done.
3238 *
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.
3244 *
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.
3248 */
3249
3250 /* was a target, not in roles */
3251 if ((rport->scsi_target_id != -1) &&
3252 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
3253 return rport;
3254
3255 /*
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.
3259 */
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);
3264
3265 spin_lock_irqsave(shost->host_lock, flags);
3266
3267 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3268 FC_RPORT_DEVLOSS_PENDING |
3269 FC_RPORT_DEVLOSS_CALLBK_DONE);
3270
3271 spin_unlock_irqrestore(shost->host_lock, flags);
3272
3273 /* if target, initiate a scan */
3274 if (rport->scsi_target_id != -1) {
3275 scsi_target_unblock(&rport->dev,
3276 SDEV_RUNNING);
3277 spin_lock_irqsave(shost->host_lock,
3278 flags);
3279 rport->flags |= FC_RPORT_SCAN_PENDING;
3280 scsi_queue_work(shost,
3281 &rport->scan_work);
3282 spin_unlock_irqrestore(shost->host_lock,
3283 flags);
3284 }
3285
3286 fc_bsg_goose_queue(rport);
3287
3288 return rport;
3289 }
3290 }
3291 }
3292
3293 /*
3294 * Search the bindings array
3295 * Note: if never a FCP target, you won't be on this list
3296 */
3297 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
3298
3299 /* search for a matching consistent binding */
3300
3301 list_for_each_entry(rport, &fc_host->rport_bindings,
3302 peers) {
3303 if (rport->channel != channel)
3304 continue;
3305
3306 switch (fc_host->tgtid_bind_type) {
3307 case FC_TGTID_BIND_BY_WWPN:
3308 if (rport->port_name == ids->port_name)
3309 match = 1;
3310 break;
3311 case FC_TGTID_BIND_BY_WWNN:
3312 if (rport->node_name == ids->node_name)
3313 match = 1;
3314 break;
3315 case FC_TGTID_BIND_BY_ID:
3316 if (rport->port_id == ids->port_id)
3317 match = 1;
3318 break;
3319 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3320 break;
3321 }
3322
3323 if (match) {
3324 list_move_tail(&rport->peers, &fc_host->rports);
3325 break;
3326 }
3327 }
3328
3329 if (match) {
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;
3337
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);
3342
3343 fc_remote_port_rolechg(rport, ids->roles);
3344 return rport;
3345 }
3346 }
3347
3348 spin_unlock_irqrestore(shost->host_lock, flags);
3349
3350 /* No consistent binding found - create new remote port entry */
3351 rport = fc_remote_port_create(shost, channel, ids);
3352
3353 return rport;
3354 }
3355 EXPORT_SYMBOL(fc_remote_port_add);
3356
3357
3358 /**
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
3361 *
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:
3366 *
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.
3371 *
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.
3378 *
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.
3381 *
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
3386 * is then expected.
3387 *
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).
3397 *
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.
3404 *
3405 * Called from normal process context only - cannot be called from interrupt.
3406 *
3407 * Notes:
3408 * This routine assumes no locks are held on entry.
3409 */
3410 void
fc_remote_port_delete(struct fc_rport * rport)3411 fc_remote_port_delete(struct fc_rport *rport)
3412 {
3413 struct Scsi_Host *shost = rport_to_shost(rport);
3414 unsigned long timeout = rport->dev_loss_tmo;
3415 unsigned long flags;
3416
3417 /*
3418 * No need to flush the fc_host work_q's, as all adds are synchronous.
3419 *
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.
3423 */
3424
3425 spin_lock_irqsave(shost->host_lock, flags);
3426
3427 if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
3428 (rport->port_state != FC_PORTSTATE_MARGINAL)) {
3429 spin_unlock_irqrestore(shost->host_lock, flags);
3430 return;
3431 }
3432
3433 /*
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
3441 * container.
3442 * So... we now unconditionally wait dev_loss_tmo before
3443 * destroying an rport.
3444 */
3445
3446 rport->port_state = FC_PORTSTATE_BLOCKED;
3447
3448 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
3449
3450 spin_unlock_irqrestore(shost->host_lock, flags);
3451
3452 scsi_target_block(&rport->dev);
3453
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);
3459
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);
3462 }
3463 EXPORT_SYMBOL(fc_remote_port_delete);
3464
3465 /**
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.
3469 *
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
3478 * will take place).
3479 *
3480 * Should not be called from interrupt context.
3481 *
3482 * Notes:
3483 * This routine assumes no locks are held on entry.
3484 */
3485 void
fc_remote_port_rolechg(struct fc_rport * rport,u32 roles)3486 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
3487 {
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;
3491 int create = 0;
3492
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++;
3497 create = 1;
3498 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
3499 create = 1;
3500 }
3501
3502 rport->roles = roles;
3503
3504 spin_unlock_irqrestore(shost->host_lock, flags);
3505
3506 if (create) {
3507 /*
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.
3514 *
3515 * Take no action on the del_timer failure as the state
3516 * machine state change will validate the
3517 * transaction.
3518 */
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);
3523
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);
3529
3530 /* ensure any stgt delete functions are done */
3531 fc_flush_work(shost);
3532
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);
3539 }
3540 }
3541 EXPORT_SYMBOL(fc_remote_port_rolechg);
3542
3543 /**
3544 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3545 * @work: rport target that failed to reappear in the allotted time.
3546 *
3547 * Description: An attempt to delete a remote port blocks, and if it fails
3548 * to return in the allotted time this gets called.
3549 */
3550 static void
fc_timeout_deleted_rport(struct work_struct * work)3551 fc_timeout_deleted_rport(struct work_struct *work)
3552 {
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;
3560
3561 spin_lock_irqsave(shost->host_lock, flags);
3562
3563 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3564
3565 /*
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.
3569 */
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);
3580 return;
3581 }
3582
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"
3588 " rport%s alone\n",
3589 (rport->scsi_target_id != -1) ? " and starget" : "");
3590 return;
3591 }
3592
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"
3599 " rport%s\n",
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);
3603 return;
3604 }
3605
3606 dev_printk(KERN_ERR, &rport->dev,
3607 "blocked FC remote port time out: removing target and "
3608 "saving binding\n");
3609
3610 list_move_tail(&rport->peers, &fc_host->rport_bindings);
3611
3612 /*
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.
3616 */
3617
3618 /*
3619 * Reinitialize port attributes that may change if the port comes back.
3620 */
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;
3626
3627 /*
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).
3631 */
3632 spin_unlock_irqrestore(shost->host_lock, flags);
3633 fc_terminate_rport_io(rport);
3634
3635 spin_lock_irqsave(shost->host_lock, flags);
3636
3637 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */
3638
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;
3644 break;
3645 case FC_TGTID_BIND_BY_WWNN:
3646 rport->port_name = -1;
3647 rport->port_id = -1;
3648 break;
3649 case FC_TGTID_BIND_BY_ID:
3650 rport->node_name = -1;
3651 rport->port_name = -1;
3652 break;
3653 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3654 break;
3655 }
3656
3657 /*
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.
3661 */
3662 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3663 fc_queue_work(shost, &rport->stgt_delete_work);
3664
3665 do_callback = 1;
3666 }
3667
3668 spin_unlock_irqrestore(shost->host_lock, flags);
3669
3670 /*
3671 * Notify the driver that the rport is now dead. The LLDD will
3672 * also guarantee that any communication to the rport is terminated
3673 *
3674 * Note: we set the CALLBK_DONE flag above to correspond
3675 */
3676 if (do_callback && i->f->dev_loss_tmo_callbk)
3677 i->f->dev_loss_tmo_callbk(rport);
3678 }
3679
3680
3681 /**
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.
3684 *
3685 * Notes: Only requests the failure of the io, not that all are flushed
3686 * prior to returning.
3687 */
3688 static void
fc_timeout_fail_rport_io(struct work_struct * work)3689 fc_timeout_fail_rport_io(struct work_struct *work)
3690 {
3691 struct fc_rport *rport =
3692 container_of(work, struct fc_rport, fail_io_work.work);
3693
3694 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3695 return;
3696
3697 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3698 fc_terminate_rport_io(rport);
3699 }
3700
3701 /**
3702 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3703 * @work: remote port to be scanned.
3704 */
3705 static void
fc_scsi_scan_rport(struct work_struct * work)3706 fc_scsi_scan_rport(struct work_struct *work)
3707 {
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;
3713
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,
3720 SCSI_SCAN_RESCAN);
3721 }
3722
3723 spin_lock_irqsave(shost->host_lock, flags);
3724 rport->flags &= ~FC_RPORT_SCAN_PENDING;
3725 spin_unlock_irqrestore(shost->host_lock, flags);
3726 }
3727
3728 /**
3729 * fc_block_rport() - Block SCSI eh thread for blocked fc_rport.
3730 * @rport: Remote port that scsi_eh is trying to recover.
3731 *
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.
3737 *
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.
3741 */
fc_block_rport(struct fc_rport * rport)3742 int fc_block_rport(struct fc_rport *rport)
3743 {
3744 struct Scsi_Host *shost = rport_to_shost(rport);
3745 unsigned long flags;
3746
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);
3751 msleep(1000);
3752 spin_lock_irqsave(shost->host_lock, flags);
3753 }
3754 spin_unlock_irqrestore(shost->host_lock, flags);
3755
3756 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3757 return FAST_IO_FAIL;
3758
3759 return 0;
3760 }
3761 EXPORT_SYMBOL(fc_block_rport);
3762
3763 /**
3764 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3765 * @cmnd: SCSI command that scsi_eh is trying to recover
3766 *
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.
3772 *
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.
3776 */
fc_block_scsi_eh(struct scsi_cmnd * cmnd)3777 int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
3778 {
3779 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3780
3781 if (WARN_ON_ONCE(!rport))
3782 return FAST_IO_FAIL;
3783
3784 return fc_block_rport(rport);
3785 }
3786 EXPORT_SYMBOL(fc_block_scsi_eh);
3787
3788 /*
3789 * fc_eh_should_retry_cmd - Checks if the cmd should be retried or not
3790 * @scmd: The SCSI command to be checked
3791 *
3792 * This checks the rport state to decide if a cmd is
3793 * retryable.
3794 *
3795 * Returns: true if the rport state is not in marginal state.
3796 */
fc_eh_should_retry_cmd(struct scsi_cmnd * scmd)3797 bool fc_eh_should_retry_cmd(struct scsi_cmnd *scmd)
3798 {
3799 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
3800
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);
3804 return false;
3805 }
3806 return true;
3807 }
3808 EXPORT_SYMBOL_GPL(fc_eh_should_retry_cmd);
3809
3810 /**
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
3816 * the virtual port.
3817 * @ret_vport: The pointer to the created vport.
3818 *
3819 * Allocates and creates the vport structure, calls the parent host
3820 * to instantiate the vport, this completes w/ class and sysfs creation.
3821 *
3822 * Notes:
3823 * This routine assumes no locks are held on entry.
3824 */
3825 static int
fc_vport_setup(struct Scsi_Host * shost,int channel,struct device * pdev,struct fc_vport_identifiers * ids,struct fc_vport ** ret_vport)3826 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
3827 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3828 {
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;
3832 struct device *dev;
3833 unsigned long flags;
3834 size_t size;
3835 int error;
3836
3837 *ret_vport = NULL;
3838
3839 if ( ! fci->f->vport_create)
3840 return -ENOENT;
3841
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__);
3846 return -ENOMEM;
3847 }
3848
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);
3861
3862 spin_lock_irqsave(shost->host_lock, flags);
3863
3864 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3865 spin_unlock_irqrestore(shost->host_lock, flags);
3866 kfree(vport);
3867 return -ENOSPC;
3868 }
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 */
3873
3874 spin_unlock_irqrestore(shost->host_lock, flags);
3875
3876 dev = &vport->dev;
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);
3883
3884 error = device_add(dev);
3885 if (error) {
3886 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3887 goto delete_vport;
3888 }
3889 transport_add_device(dev);
3890 transport_configure_device(dev);
3891
3892 error = fci->f->vport_create(vport, ids->disable);
3893 if (error) {
3894 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3895 goto delete_vport_all;
3896 }
3897
3898 /*
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.
3901 */
3902 if (pdev != &shost->shost_gendev) {
3903 error = sysfs_create_link(&shost->shost_gendev.kobj,
3904 &dev->kobj, dev_name(dev));
3905 if (error)
3906 printk(KERN_ERR
3907 "%s: Cannot create vport symlinks for "
3908 "%s, err=%d\n",
3909 __func__, dev_name(dev), error);
3910 }
3911 spin_lock_irqsave(shost->host_lock, flags);
3912 vport->flags &= ~FC_VPORT_CREATING;
3913 spin_unlock_irqrestore(shost->host_lock, flags);
3914
3915 dev_printk(KERN_NOTICE, pdev,
3916 "%s created via shost%d channel %d\n", dev_name(dev),
3917 shost->host_no, channel);
3918
3919 *ret_vport = vport;
3920
3921 return 0;
3922
3923 delete_vport_all:
3924 transport_remove_device(dev);
3925 device_del(dev);
3926 delete_vport:
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);
3934 kfree(vport);
3935
3936 return error;
3937 }
3938
3939 /**
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
3944 * the virtual port.
3945 *
3946 * Notes:
3947 * This routine assumes no locks are held on entry.
3948 */
3949 struct fc_vport *
fc_vport_create(struct Scsi_Host * shost,int channel,struct fc_vport_identifiers * ids)3950 fc_vport_create(struct Scsi_Host *shost, int channel,
3951 struct fc_vport_identifiers *ids)
3952 {
3953 int stat;
3954 struct fc_vport *vport;
3955
3956 stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3957 ids, &vport);
3958 return stat ? NULL : vport;
3959 }
3960 EXPORT_SYMBOL(fc_vport_create);
3961
3962 /**
3963 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3964 * @vport: fc_vport to be terminated
3965 *
3966 * Calls the LLDD vport_delete() function, then deallocates and removes
3967 * the vport from the shost and object tree.
3968 *
3969 * Notes:
3970 * This routine assumes no locks are held on entry.
3971 */
3972 int
fc_vport_terminate(struct fc_vport * vport)3973 fc_vport_terminate(struct fc_vport *vport)
3974 {
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;
3980 int stat;
3981
3982 if (i->f->vport_delete)
3983 stat = i->f->vport_delete(vport);
3984 else
3985 stat = -ENOENT;
3986
3987 spin_lock_irqsave(shost->host_lock, flags);
3988 vport->flags &= ~FC_VPORT_DELETING;
3989 if (!stat) {
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 */
3994 }
3995 spin_unlock_irqrestore(shost->host_lock, flags);
3996
3997 if (stat)
3998 return stat;
3999
4000 if (dev->parent != &shost->shost_gendev)
4001 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
4002 transport_remove_device(dev);
4003 device_del(dev);
4004 transport_destroy_device(dev);
4005
4006 /*
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.
4010 */
4011 put_device(dev); /* for self-reference */
4012
4013 return 0; /* SUCCESS */
4014 }
4015 EXPORT_SYMBOL(fc_vport_terminate);
4016
4017 /**
4018 * fc_vport_sched_delete - workq-based delete request for a vport
4019 * @work: vport to be deleted.
4020 */
4021 static void
fc_vport_sched_delete(struct work_struct * work)4022 fc_vport_sched_delete(struct work_struct *work)
4023 {
4024 struct fc_vport *vport =
4025 container_of(work, struct fc_vport, vport_delete_work);
4026 int stat;
4027
4028 stat = fc_vport_terminate(vport);
4029 if (stat)
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);
4035 }
4036
4037
4038 /*
4039 * BSG support
4040 */
4041
4042 /**
4043 * fc_bsg_job_timeout - handler for when a bsg request timesout
4044 * @req: request that timed out
4045 */
4046 static enum blk_eh_timer_return
fc_bsg_job_timeout(struct request * req)4047 fc_bsg_job_timeout(struct request *req)
4048 {
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;
4054
4055 if (rport && rport->port_state == FC_PORTSTATE_BLOCKED)
4056 return BLK_EH_RESET_TIMER;
4057
4058 inflight = bsg_job_get(job);
4059
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) {
4064 bsg_job_put(job);
4065 return BLK_EH_RESET_TIMER;
4066 } else if (err)
4067 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
4068 "abort failed with status %d\n", err);
4069 }
4070
4071 /* the blk_end_sync_io() doesn't check the error */
4072 if (inflight)
4073 blk_mq_end_request(req, BLK_STS_IOERR);
4074 return BLK_EH_DONE;
4075 }
4076
4077 /**
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
4081 */
fc_bsg_host_dispatch(struct Scsi_Host * shost,struct bsg_job * job)4082 static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
4083 {
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 */
4088 int ret;
4089
4090 /* check if we really have all the request data needed */
4091 if (job->request_len < cmdlen) {
4092 ret = -ENOMSG;
4093 goto fail_host_msg;
4094 }
4095
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);
4100 break;
4101
4102 case FC_BSG_HST_DEL_RPORT:
4103 cmdlen += sizeof(struct fc_bsg_host_del_rport);
4104 break;
4105
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)) {
4111 ret = -EINVAL;
4112 goto fail_host_msg;
4113 }
4114 break;
4115
4116 case FC_BSG_HST_CT:
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)) {
4121 ret = -EINVAL;
4122 goto fail_host_msg;
4123 }
4124 break;
4125
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)) {
4131 ret = -ESRCH;
4132 goto fail_host_msg;
4133 }
4134 break;
4135
4136 default:
4137 ret = -EBADR;
4138 goto fail_host_msg;
4139 }
4140
4141 ret = i->f->bsg_request(job);
4142 if (!ret)
4143 return 0;
4144
4145 fail_host_msg:
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);
4153 return 0;
4154 }
4155
4156
4157 /*
4158 * fc_bsg_goose_queue - restart rport queue in case it was stopped
4159 * @rport: rport to be restarted
4160 */
4161 static void
fc_bsg_goose_queue(struct fc_rport * rport)4162 fc_bsg_goose_queue(struct fc_rport *rport)
4163 {
4164 struct request_queue *q = rport->rqst_q;
4165
4166 if (q)
4167 blk_mq_run_hw_queues(q, true);
4168 }
4169
4170 /**
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
4174 */
fc_bsg_rport_dispatch(struct Scsi_Host * shost,struct bsg_job * job)4175 static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
4176 {
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 */
4181 int ret;
4182
4183 /* check if we really have all the request data needed */
4184 if (job->request_len < cmdlen) {
4185 ret = -ENOMSG;
4186 goto fail_rport_msg;
4187 }
4188
4189 /* Validate the rport command */
4190 switch (bsg_request->msgcode) {
4191 case FC_BSG_RPT_ELS:
4192 cmdlen += sizeof(struct fc_bsg_rport_els);
4193 goto check_bidi;
4194
4195 case FC_BSG_RPT_CT:
4196 cmdlen += sizeof(struct fc_bsg_rport_ct);
4197 check_bidi:
4198 /* there better be xmt and rcv payloads */
4199 if ((!job->request_payload.payload_len) ||
4200 (!job->reply_payload.payload_len)) {
4201 ret = -EINVAL;
4202 goto fail_rport_msg;
4203 }
4204 break;
4205 default:
4206 ret = -EBADR;
4207 goto fail_rport_msg;
4208 }
4209
4210 ret = i->f->bsg_request(job);
4211 if (!ret)
4212 return 0;
4213
4214 fail_rport_msg:
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);
4222 return 0;
4223 }
4224
fc_bsg_dispatch(struct bsg_job * job)4225 static int fc_bsg_dispatch(struct bsg_job *job)
4226 {
4227 struct Scsi_Host *shost = fc_bsg_to_shost(job);
4228
4229 if (scsi_is_fc_rport(job->dev))
4230 return fc_bsg_rport_dispatch(shost, job);
4231 else
4232 return fc_bsg_host_dispatch(shost, job);
4233 }
4234
fc_bsg_rport_prep(struct fc_rport * rport)4235 static blk_status_t fc_bsg_rport_prep(struct fc_rport *rport)
4236 {
4237 if (rport->port_state == FC_PORTSTATE_BLOCKED &&
4238 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
4239 return BLK_STS_RESOURCE;
4240
4241 if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
4242 (rport->port_state != FC_PORTSTATE_MARGINAL))
4243 return BLK_STS_IOERR;
4244
4245 return BLK_STS_OK;
4246 }
4247
4248
fc_bsg_dispatch_prep(struct bsg_job * job)4249 static int fc_bsg_dispatch_prep(struct bsg_job *job)
4250 {
4251 struct fc_rport *rport = fc_bsg_to_rport(job);
4252 blk_status_t ret;
4253
4254 ret = fc_bsg_rport_prep(rport);
4255 switch (ret) {
4256 case BLK_STS_OK:
4257 break;
4258 case BLK_STS_RESOURCE:
4259 return -EAGAIN;
4260 default:
4261 return -EIO;
4262 }
4263
4264 return fc_bsg_dispatch(job);
4265 }
4266
4267 /**
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
4271 */
4272 static int
fc_bsg_hostadd(struct Scsi_Host * shost,struct fc_host_attrs * fc_host)4273 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
4274 {
4275 struct device *dev = &shost->shost_gendev;
4276 struct fc_internal *i = to_fc_internal(shost->transportt);
4277 struct request_queue *q;
4278 char bsg_name[20];
4279
4280 fc_host->rqst_q = NULL;
4281
4282 if (!i->f->bsg_request)
4283 return -ENOTSUPP;
4284
4285 snprintf(bsg_name, sizeof(bsg_name),
4286 "fc_host%d", shost->host_no);
4287
4288 q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, fc_bsg_job_timeout,
4289 i->f->dd_bsg_size);
4290 if (IS_ERR(q)) {
4291 dev_err(dev,
4292 "fc_host%d: bsg interface failed to initialize - setup queue\n",
4293 shost->host_no);
4294 return PTR_ERR(q);
4295 }
4296 __scsi_init_queue(shost, q);
4297 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
4298 fc_host->rqst_q = q;
4299 return 0;
4300 }
4301
4302 /**
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
4306 */
4307 static int
fc_bsg_rportadd(struct Scsi_Host * shost,struct fc_rport * rport)4308 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
4309 {
4310 struct device *dev = &rport->dev;
4311 struct fc_internal *i = to_fc_internal(shost->transportt);
4312 struct request_queue *q;
4313
4314 rport->rqst_q = NULL;
4315
4316 if (!i->f->bsg_request)
4317 return -ENOTSUPP;
4318
4319 q = bsg_setup_queue(dev, dev_name(dev), fc_bsg_dispatch_prep,
4320 fc_bsg_job_timeout, i->f->dd_bsg_size);
4321 if (IS_ERR(q)) {
4322 dev_err(dev, "failed to setup bsg queue\n");
4323 return PTR_ERR(q);
4324 }
4325 __scsi_init_queue(shost, q);
4326 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
4327 rport->rqst_q = q;
4328 return 0;
4329 }
4330
4331
4332 /**
4333 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
4334 * @q: the request_queue that is to be torn down.
4335 *
4336 * Notes:
4337 * Before unregistering the queue empty any requests that are blocked
4338 *
4339 *
4340 */
4341 static void
fc_bsg_remove(struct request_queue * q)4342 fc_bsg_remove(struct request_queue *q)
4343 {
4344 bsg_remove_queue(q);
4345 }
4346
4347
4348 /* Original Author: Martin Hicks */
4349 MODULE_AUTHOR("James Smart");
4350 MODULE_DESCRIPTION("FC Transport Attributes");
4351 MODULE_LICENSE("GPL");
4352
4353 module_init(fc_transport_init);
4354 module_exit(fc_transport_exit);
4355