1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright(c) 2011 - 2012 Intel Corporation. All rights reserved.
4 *
5 * Maintained at www.Open-FCoE.org
6 */
7
8#include <linux/module.h>
9#include <linux/types.h>
10#include <linux/kernel.h>
11#include <linux/etherdevice.h>
12#include <linux/ctype.h>
13
14#include <scsi/fcoe_sysfs.h>
15#include <scsi/libfcoe.h>
16
17/*
18 * OK to include local libfcoe.h for debug_logging, but cannot include
19 * <scsi/libfcoe.h> otherwise non-netdev based fcoe solutions would have
20 * have to include more than fcoe_sysfs.h.
21 */
22#include "libfcoe.h"
23
24static atomic_t ctlr_num;
25static atomic_t fcf_num;
26
27/*
28 * fcoe_fcf_dev_loss_tmo: the default number of seconds that fcoe sysfs
29 * should insulate the loss of a fcf.
30 */
31static unsigned int fcoe_fcf_dev_loss_tmo = 1800; /* seconds */
32
33module_param_named(fcf_dev_loss_tmo, fcoe_fcf_dev_loss_tmo,
34 uint, S_IRUGO|S_IWUSR);
35MODULE_PARM_DESC(fcf_dev_loss_tmo,
36 "Maximum number of seconds that libfcoe should"
37 " insulate the loss of a fcf. Once this value is"
38 " exceeded, the fcf is removed.");
39
40/*
41 * These are used by the fcoe_*_show_function routines, they
42 * are intentionally placed in the .c file as they're not intended
43 * for use throughout the code.
44 */
45#define fcoe_ctlr_id(x) \
46 ((x)->id)
47#define fcoe_ctlr_work_q_name(x) \
48 ((x)->work_q_name)
49#define fcoe_ctlr_work_q(x) \
50 ((x)->work_q)
51#define fcoe_ctlr_devloss_work_q_name(x) \
52 ((x)->devloss_work_q_name)
53#define fcoe_ctlr_devloss_work_q(x) \
54 ((x)->devloss_work_q)
55#define fcoe_ctlr_mode(x) \
56 ((x)->mode)
57#define fcoe_ctlr_fcf_dev_loss_tmo(x) \
58 ((x)->fcf_dev_loss_tmo)
59#define fcoe_ctlr_link_fail(x) \
60 ((x)->lesb.lesb_link_fail)
61#define fcoe_ctlr_vlink_fail(x) \
62 ((x)->lesb.lesb_vlink_fail)
63#define fcoe_ctlr_miss_fka(x) \
64 ((x)->lesb.lesb_miss_fka)
65#define fcoe_ctlr_symb_err(x) \
66 ((x)->lesb.lesb_symb_err)
67#define fcoe_ctlr_err_block(x) \
68 ((x)->lesb.lesb_err_block)
69#define fcoe_ctlr_fcs_error(x) \
70 ((x)->lesb.lesb_fcs_error)
71#define fcoe_ctlr_enabled(x) \
72 ((x)->enabled)
73#define fcoe_fcf_state(x) \
74 ((x)->state)
75#define fcoe_fcf_fabric_name(x) \
76 ((x)->fabric_name)
77#define fcoe_fcf_switch_name(x) \
78 ((x)->switch_name)
79#define fcoe_fcf_fc_map(x) \
80 ((x)->fc_map)
81#define fcoe_fcf_vfid(x) \
82 ((x)->vfid)
83#define fcoe_fcf_mac(x) \
84 ((x)->mac)
85#define fcoe_fcf_priority(x) \
86 ((x)->priority)
87#define fcoe_fcf_fka_period(x) \
88 ((x)->fka_period)
89#define fcoe_fcf_dev_loss_tmo(x) \
90 ((x)->dev_loss_tmo)
91#define fcoe_fcf_selected(x) \
92 ((x)->selected)
93#define fcoe_fcf_vlan_id(x) \
94 ((x)->vlan_id)
95
96/*
97 * dev_loss_tmo attribute
98 */
99static int fcoe_str_to_dev_loss(const char *buf, unsigned long *val)
100{
101 int ret;
102
103 ret = kstrtoul(s: buf, base: 0, res: val);
104 if (ret)
105 return -EINVAL;
106 /*
107 * Check for overflow; dev_loss_tmo is u32
108 */
109 if (*val > UINT_MAX)
110 return -EINVAL;
111
112 return 0;
113}
114
115static int fcoe_fcf_set_dev_loss_tmo(struct fcoe_fcf_device *fcf,
116 unsigned long val)
117{
118 if ((fcf->state == FCOE_FCF_STATE_UNKNOWN) ||
119 (fcf->state == FCOE_FCF_STATE_DISCONNECTED) ||
120 (fcf->state == FCOE_FCF_STATE_DELETED))
121 return -EBUSY;
122 /*
123 * Check for overflow; dev_loss_tmo is u32
124 */
125 if (val > UINT_MAX)
126 return -EINVAL;
127
128 fcoe_fcf_dev_loss_tmo(fcf) = val;
129 return 0;
130}
131
132#define FCOE_DEVICE_ATTR(_prefix, _name, _mode, _show, _store) \
133struct device_attribute device_attr_fcoe_##_prefix##_##_name = \
134 __ATTR(_name, _mode, _show, _store)
135
136#define fcoe_ctlr_show_function(field, format_string, sz, cast) \
137static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
138 struct device_attribute *attr, \
139 char *buf) \
140{ \
141 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); \
142 if (ctlr->f->get_fcoe_ctlr_##field) \
143 ctlr->f->get_fcoe_ctlr_##field(ctlr); \
144 return snprintf(buf, sz, format_string, \
145 cast fcoe_ctlr_##field(ctlr)); \
146}
147
148#define fcoe_fcf_show_function(field, format_string, sz, cast) \
149static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \
150 struct device_attribute *attr, \
151 char *buf) \
152{ \
153 struct fcoe_fcf_device *fcf = dev_to_fcf(dev); \
154 struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf); \
155 if (ctlr->f->get_fcoe_fcf_##field) \
156 ctlr->f->get_fcoe_fcf_##field(fcf); \
157 return snprintf(buf, sz, format_string, \
158 cast fcoe_fcf_##field(fcf)); \
159}
160
161#define fcoe_ctlr_private_show_function(field, format_string, sz, cast) \
162static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
163 struct device_attribute *attr, \
164 char *buf) \
165{ \
166 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); \
167 return snprintf(buf, sz, format_string, cast fcoe_ctlr_##field(ctlr)); \
168}
169
170#define fcoe_fcf_private_show_function(field, format_string, sz, cast) \
171static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \
172 struct device_attribute *attr, \
173 char *buf) \
174{ \
175 struct fcoe_fcf_device *fcf = dev_to_fcf(dev); \
176 return snprintf(buf, sz, format_string, cast fcoe_fcf_##field(fcf)); \
177}
178
179#define fcoe_ctlr_private_rd_attr(field, format_string, sz) \
180 fcoe_ctlr_private_show_function(field, format_string, sz, ) \
181 static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \
182 show_fcoe_ctlr_device_##field, NULL)
183
184#define fcoe_ctlr_rd_attr(field, format_string, sz) \
185 fcoe_ctlr_show_function(field, format_string, sz, ) \
186 static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \
187 show_fcoe_ctlr_device_##field, NULL)
188
189#define fcoe_fcf_rd_attr(field, format_string, sz) \
190 fcoe_fcf_show_function(field, format_string, sz, ) \
191 static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \
192 show_fcoe_fcf_device_##field, NULL)
193
194#define fcoe_fcf_private_rd_attr(field, format_string, sz) \
195 fcoe_fcf_private_show_function(field, format_string, sz, ) \
196 static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \
197 show_fcoe_fcf_device_##field, NULL)
198
199#define fcoe_ctlr_private_rd_attr_cast(field, format_string, sz, cast) \
200 fcoe_ctlr_private_show_function(field, format_string, sz, (cast)) \
201 static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \
202 show_fcoe_ctlr_device_##field, NULL)
203
204#define fcoe_fcf_private_rd_attr_cast(field, format_string, sz, cast) \
205 fcoe_fcf_private_show_function(field, format_string, sz, (cast)) \
206 static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \
207 show_fcoe_fcf_device_##field, NULL)
208
209#define fcoe_enum_name_search(title, table_type, table) \
210static const char *get_fcoe_##title##_name(enum table_type table_key) \
211{ \
212 if (table_key < 0 || table_key >= ARRAY_SIZE(table)) \
213 return NULL; \
214 return table[table_key]; \
215}
216
217static char *fip_conn_type_names[] = {
218 [ FIP_CONN_TYPE_UNKNOWN ] = "Unknown",
219 [ FIP_CONN_TYPE_FABRIC ] = "Fabric",
220 [ FIP_CONN_TYPE_VN2VN ] = "VN2VN",
221};
222fcoe_enum_name_search(ctlr_mode, fip_conn_type, fip_conn_type_names)
223
224static enum fip_conn_type fcoe_parse_mode(const char *buf)
225{
226 int i;
227
228 for (i = 0; i < ARRAY_SIZE(fip_conn_type_names); i++) {
229 if (strcasecmp(s1: buf, s2: fip_conn_type_names[i]) == 0)
230 return i;
231 }
232
233 return FIP_CONN_TYPE_UNKNOWN;
234}
235
236static char *fcf_state_names[] = {
237 [ FCOE_FCF_STATE_UNKNOWN ] = "Unknown",
238 [ FCOE_FCF_STATE_DISCONNECTED ] = "Disconnected",
239 [ FCOE_FCF_STATE_CONNECTED ] = "Connected",
240};
241fcoe_enum_name_search(fcf_state, fcf_state, fcf_state_names)
242#define FCOE_FCF_STATE_MAX_NAMELEN 50
243
244static ssize_t show_fcf_state(struct device *dev,
245 struct device_attribute *attr,
246 char *buf)
247{
248 struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
249 const char *name;
250 name = get_fcoe_fcf_state_name(table_key: fcf->state);
251 if (!name)
252 return -EINVAL;
253 return snprintf(buf, FCOE_FCF_STATE_MAX_NAMELEN, fmt: "%s\n", name);
254}
255static FCOE_DEVICE_ATTR(fcf, state, S_IRUGO, show_fcf_state, NULL);
256
257#define FCOE_MAX_MODENAME_LEN 20
258static ssize_t show_ctlr_mode(struct device *dev,
259 struct device_attribute *attr,
260 char *buf)
261{
262 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
263 const char *name;
264
265 name = get_fcoe_ctlr_mode_name(table_key: ctlr->mode);
266 if (!name)
267 return -EINVAL;
268 return snprintf(buf, FCOE_MAX_MODENAME_LEN,
269 fmt: "%s\n", name);
270}
271
272static ssize_t store_ctlr_mode(struct device *dev,
273 struct device_attribute *attr,
274 const char *buf, size_t count)
275{
276 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
277 char mode[FCOE_MAX_MODENAME_LEN + 1];
278
279 if (count > FCOE_MAX_MODENAME_LEN)
280 return -EINVAL;
281
282 strncpy(p: mode, q: buf, size: count);
283
284 if (mode[count - 1] == '\n')
285 mode[count - 1] = '\0';
286 else
287 mode[count] = '\0';
288
289 switch (ctlr->enabled) {
290 case FCOE_CTLR_ENABLED:
291 LIBFCOE_SYSFS_DBG(ctlr, "Cannot change mode when enabled.\n");
292 return -EBUSY;
293 case FCOE_CTLR_DISABLED:
294 if (!ctlr->f->set_fcoe_ctlr_mode) {
295 LIBFCOE_SYSFS_DBG(ctlr,
296 "Mode change not supported by LLD.\n");
297 return -ENOTSUPP;
298 }
299
300 ctlr->mode = fcoe_parse_mode(buf: mode);
301 if (ctlr->mode == FIP_CONN_TYPE_UNKNOWN) {
302 LIBFCOE_SYSFS_DBG(ctlr, "Unknown mode %s provided.\n",
303 buf);
304 return -EINVAL;
305 }
306
307 ctlr->f->set_fcoe_ctlr_mode(ctlr);
308 LIBFCOE_SYSFS_DBG(ctlr, "Mode changed to %s.\n", buf);
309
310 return count;
311 case FCOE_CTLR_UNUSED:
312 default:
313 LIBFCOE_SYSFS_DBG(ctlr, "Mode change not supported.\n");
314 return -ENOTSUPP;
315 }
316}
317
318static FCOE_DEVICE_ATTR(ctlr, mode, S_IRUGO | S_IWUSR,
319 show_ctlr_mode, store_ctlr_mode);
320
321static ssize_t store_ctlr_enabled(struct device *dev,
322 struct device_attribute *attr,
323 const char *buf, size_t count)
324{
325 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
326 bool enabled;
327 int rc;
328
329 if (*buf == '1')
330 enabled = true;
331 else if (*buf == '0')
332 enabled = false;
333 else
334 return -EINVAL;
335
336 switch (ctlr->enabled) {
337 case FCOE_CTLR_ENABLED:
338 if (enabled)
339 return count;
340 ctlr->enabled = FCOE_CTLR_DISABLED;
341 break;
342 case FCOE_CTLR_DISABLED:
343 if (!enabled)
344 return count;
345 ctlr->enabled = FCOE_CTLR_ENABLED;
346 break;
347 case FCOE_CTLR_UNUSED:
348 return -ENOTSUPP;
349 }
350
351 rc = ctlr->f->set_fcoe_ctlr_enabled(ctlr);
352 if (rc)
353 return rc;
354
355 return count;
356}
357
358static char *ctlr_enabled_state_names[] = {
359 [ FCOE_CTLR_ENABLED ] = "1",
360 [ FCOE_CTLR_DISABLED ] = "0",
361};
362fcoe_enum_name_search(ctlr_enabled_state, ctlr_enabled_state,
363 ctlr_enabled_state_names)
364#define FCOE_CTLR_ENABLED_MAX_NAMELEN 50
365
366static ssize_t show_ctlr_enabled_state(struct device *dev,
367 struct device_attribute *attr,
368 char *buf)
369{
370 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
371 const char *name;
372
373 name = get_fcoe_ctlr_enabled_state_name(table_key: ctlr->enabled);
374 if (!name)
375 return -EINVAL;
376 return snprintf(buf, FCOE_CTLR_ENABLED_MAX_NAMELEN,
377 fmt: "%s\n", name);
378}
379
380static FCOE_DEVICE_ATTR(ctlr, enabled, S_IRUGO | S_IWUSR,
381 show_ctlr_enabled_state,
382 store_ctlr_enabled);
383
384static ssize_t store_ctlr_fip_resp(struct device *dev,
385 struct device_attribute *attr,
386 const char *buf, size_t count)
387{
388 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
389 struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr);
390
391 mutex_lock(&fip->ctlr_mutex);
392 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
393 if (buf[0] == '1') {
394 fip->fip_resp = 1;
395 mutex_unlock(lock: &fip->ctlr_mutex);
396 return count;
397 }
398 if (buf[0] == '0') {
399 fip->fip_resp = 0;
400 mutex_unlock(lock: &fip->ctlr_mutex);
401 return count;
402 }
403 }
404 mutex_unlock(lock: &fip->ctlr_mutex);
405 return -EINVAL;
406}
407
408static ssize_t show_ctlr_fip_resp(struct device *dev,
409 struct device_attribute *attr,
410 char *buf)
411{
412 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
413 struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr);
414
415 return sprintf(buf, fmt: "%d\n", fip->fip_resp ? 1 : 0);
416}
417
418static FCOE_DEVICE_ATTR(ctlr, fip_vlan_responder, S_IRUGO | S_IWUSR,
419 show_ctlr_fip_resp,
420 store_ctlr_fip_resp);
421
422static ssize_t
423fcoe_ctlr_var_store(u32 *var, const char *buf, size_t count)
424{
425 int err;
426 unsigned long v;
427
428 err = kstrtoul(s: buf, base: 10, res: &v);
429 if (err || v > UINT_MAX)
430 return -EINVAL;
431
432 *var = v;
433
434 return count;
435}
436
437static ssize_t store_ctlr_r_a_tov(struct device *dev,
438 struct device_attribute *attr,
439 const char *buf, size_t count)
440{
441 struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
442 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr: ctlr_dev);
443
444 if (ctlr_dev->enabled == FCOE_CTLR_ENABLED)
445 return -EBUSY;
446 if (ctlr_dev->enabled == FCOE_CTLR_DISABLED)
447 return fcoe_ctlr_var_store(var: &ctlr->lp->r_a_tov, buf, count);
448 return -ENOTSUPP;
449}
450
451static ssize_t show_ctlr_r_a_tov(struct device *dev,
452 struct device_attribute *attr,
453 char *buf)
454{
455 struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
456 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr: ctlr_dev);
457
458 return sprintf(buf, fmt: "%d\n", ctlr->lp->r_a_tov);
459}
460
461static FCOE_DEVICE_ATTR(ctlr, r_a_tov, S_IRUGO | S_IWUSR,
462 show_ctlr_r_a_tov, store_ctlr_r_a_tov);
463
464static ssize_t store_ctlr_e_d_tov(struct device *dev,
465 struct device_attribute *attr,
466 const char *buf, size_t count)
467{
468 struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
469 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr: ctlr_dev);
470
471 if (ctlr_dev->enabled == FCOE_CTLR_ENABLED)
472 return -EBUSY;
473 if (ctlr_dev->enabled == FCOE_CTLR_DISABLED)
474 return fcoe_ctlr_var_store(var: &ctlr->lp->e_d_tov, buf, count);
475 return -ENOTSUPP;
476}
477
478static ssize_t show_ctlr_e_d_tov(struct device *dev,
479 struct device_attribute *attr,
480 char *buf)
481{
482 struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
483 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr: ctlr_dev);
484
485 return sprintf(buf, fmt: "%d\n", ctlr->lp->e_d_tov);
486}
487
488static FCOE_DEVICE_ATTR(ctlr, e_d_tov, S_IRUGO | S_IWUSR,
489 show_ctlr_e_d_tov, store_ctlr_e_d_tov);
490
491static ssize_t
492store_private_fcoe_ctlr_fcf_dev_loss_tmo(struct device *dev,
493 struct device_attribute *attr,
494 const char *buf, size_t count)
495{
496 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
497 struct fcoe_fcf_device *fcf;
498 unsigned long val;
499 int rc;
500
501 rc = fcoe_str_to_dev_loss(buf, val: &val);
502 if (rc)
503 return rc;
504
505 fcoe_ctlr_fcf_dev_loss_tmo(ctlr) = val;
506 mutex_lock(&ctlr->lock);
507 list_for_each_entry(fcf, &ctlr->fcfs, peers)
508 fcoe_fcf_set_dev_loss_tmo(fcf, val);
509 mutex_unlock(lock: &ctlr->lock);
510 return count;
511}
512fcoe_ctlr_private_show_function(fcf_dev_loss_tmo, "%d\n", 20, );
513static FCOE_DEVICE_ATTR(ctlr, fcf_dev_loss_tmo, S_IRUGO | S_IWUSR,
514 show_fcoe_ctlr_device_fcf_dev_loss_tmo,
515 store_private_fcoe_ctlr_fcf_dev_loss_tmo);
516
517/* Link Error Status Block (LESB) */
518fcoe_ctlr_rd_attr(link_fail, "%u\n", 20);
519fcoe_ctlr_rd_attr(vlink_fail, "%u\n", 20);
520fcoe_ctlr_rd_attr(miss_fka, "%u\n", 20);
521fcoe_ctlr_rd_attr(symb_err, "%u\n", 20);
522fcoe_ctlr_rd_attr(err_block, "%u\n", 20);
523fcoe_ctlr_rd_attr(fcs_error, "%u\n", 20);
524
525fcoe_fcf_private_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
526fcoe_fcf_private_rd_attr_cast(switch_name, "0x%llx\n", 20, unsigned long long);
527fcoe_fcf_private_rd_attr(priority, "%u\n", 20);
528fcoe_fcf_private_rd_attr(fc_map, "0x%x\n", 20);
529fcoe_fcf_private_rd_attr(vfid, "%u\n", 20);
530fcoe_fcf_private_rd_attr(mac, "%pM\n", 20);
531fcoe_fcf_private_rd_attr(fka_period, "%u\n", 20);
532fcoe_fcf_rd_attr(selected, "%u\n", 20);
533fcoe_fcf_rd_attr(vlan_id, "%u\n", 20);
534
535fcoe_fcf_private_show_function(dev_loss_tmo, "%d\n", 20, )
536static ssize_t
537store_fcoe_fcf_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
538 const char *buf, size_t count)
539{
540 struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
541 unsigned long val;
542 int rc;
543
544 rc = fcoe_str_to_dev_loss(buf, val: &val);
545 if (rc)
546 return rc;
547
548 rc = fcoe_fcf_set_dev_loss_tmo(fcf, val);
549 if (rc)
550 return rc;
551 return count;
552}
553static FCOE_DEVICE_ATTR(fcf, dev_loss_tmo, S_IRUGO | S_IWUSR,
554 show_fcoe_fcf_device_dev_loss_tmo,
555 store_fcoe_fcf_dev_loss_tmo);
556
557static struct attribute *fcoe_ctlr_lesb_attrs[] = {
558 &device_attr_fcoe_ctlr_link_fail.attr,
559 &device_attr_fcoe_ctlr_vlink_fail.attr,
560 &device_attr_fcoe_ctlr_miss_fka.attr,
561 &device_attr_fcoe_ctlr_symb_err.attr,
562 &device_attr_fcoe_ctlr_err_block.attr,
563 &device_attr_fcoe_ctlr_fcs_error.attr,
564 NULL,
565};
566
567static struct attribute_group fcoe_ctlr_lesb_attr_group = {
568 .name = "lesb",
569 .attrs = fcoe_ctlr_lesb_attrs,
570};
571
572static struct attribute *fcoe_ctlr_attrs[] = {
573 &device_attr_fcoe_ctlr_fip_vlan_responder.attr,
574 &device_attr_fcoe_ctlr_fcf_dev_loss_tmo.attr,
575 &device_attr_fcoe_ctlr_r_a_tov.attr,
576 &device_attr_fcoe_ctlr_e_d_tov.attr,
577 &device_attr_fcoe_ctlr_enabled.attr,
578 &device_attr_fcoe_ctlr_mode.attr,
579 NULL,
580};
581
582static struct attribute_group fcoe_ctlr_attr_group = {
583 .attrs = fcoe_ctlr_attrs,
584};
585
586static const struct attribute_group *fcoe_ctlr_attr_groups[] = {
587 &fcoe_ctlr_attr_group,
588 &fcoe_ctlr_lesb_attr_group,
589 NULL,
590};
591
592static struct attribute *fcoe_fcf_attrs[] = {
593 &device_attr_fcoe_fcf_fabric_name.attr,
594 &device_attr_fcoe_fcf_switch_name.attr,
595 &device_attr_fcoe_fcf_dev_loss_tmo.attr,
596 &device_attr_fcoe_fcf_fc_map.attr,
597 &device_attr_fcoe_fcf_vfid.attr,
598 &device_attr_fcoe_fcf_mac.attr,
599 &device_attr_fcoe_fcf_priority.attr,
600 &device_attr_fcoe_fcf_fka_period.attr,
601 &device_attr_fcoe_fcf_state.attr,
602 &device_attr_fcoe_fcf_selected.attr,
603 &device_attr_fcoe_fcf_vlan_id.attr,
604 NULL
605};
606
607static struct attribute_group fcoe_fcf_attr_group = {
608 .attrs = fcoe_fcf_attrs,
609};
610
611static const struct attribute_group *fcoe_fcf_attr_groups[] = {
612 &fcoe_fcf_attr_group,
613 NULL,
614};
615
616static struct bus_type fcoe_bus_type;
617
618static int fcoe_bus_match(struct device *dev,
619 struct device_driver *drv)
620{
621 if (dev->bus == &fcoe_bus_type)
622 return 1;
623 return 0;
624}
625
626/**
627 * fcoe_ctlr_device_release() - Release the FIP ctlr memory
628 * @dev: Pointer to the FIP ctlr's embedded device
629 *
630 * Called when the last FIP ctlr reference is released.
631 */
632static void fcoe_ctlr_device_release(struct device *dev)
633{
634 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
635 kfree(objp: ctlr);
636}
637
638/**
639 * fcoe_fcf_device_release() - Release the FIP fcf memory
640 * @dev: Pointer to the fcf's embedded device
641 *
642 * Called when the last FIP fcf reference is released.
643 */
644static void fcoe_fcf_device_release(struct device *dev)
645{
646 struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
647 kfree(objp: fcf);
648}
649
650static const struct device_type fcoe_ctlr_device_type = {
651 .name = "fcoe_ctlr",
652 .groups = fcoe_ctlr_attr_groups,
653 .release = fcoe_ctlr_device_release,
654};
655
656static const struct device_type fcoe_fcf_device_type = {
657 .name = "fcoe_fcf",
658 .groups = fcoe_fcf_attr_groups,
659 .release = fcoe_fcf_device_release,
660};
661
662static ssize_t ctlr_create_store(const struct bus_type *bus, const char *buf,
663 size_t count)
664{
665 return fcoe_ctlr_create_store(buf, count);
666}
667static BUS_ATTR_WO(ctlr_create);
668
669static ssize_t ctlr_destroy_store(const struct bus_type *bus, const char *buf,
670 size_t count)
671{
672 return fcoe_ctlr_destroy_store(buf, count);
673}
674static BUS_ATTR_WO(ctlr_destroy);
675
676static struct attribute *fcoe_bus_attrs[] = {
677 &bus_attr_ctlr_create.attr,
678 &bus_attr_ctlr_destroy.attr,
679 NULL,
680};
681ATTRIBUTE_GROUPS(fcoe_bus);
682
683static struct bus_type fcoe_bus_type = {
684 .name = "fcoe",
685 .match = &fcoe_bus_match,
686 .bus_groups = fcoe_bus_groups,
687};
688
689/**
690 * fcoe_ctlr_device_flush_work() - Flush a FIP ctlr's workqueue
691 * @ctlr: Pointer to the FIP ctlr whose workqueue is to be flushed
692 */
693static void fcoe_ctlr_device_flush_work(struct fcoe_ctlr_device *ctlr)
694{
695 if (!fcoe_ctlr_work_q(ctlr)) {
696 printk(KERN_ERR
697 "ERROR: FIP Ctlr '%d' attempted to flush work, "
698 "when no workqueue created.\n", ctlr->id);
699 dump_stack();
700 return;
701 }
702
703 flush_workqueue(fcoe_ctlr_work_q(ctlr));
704}
705
706/**
707 * fcoe_ctlr_device_queue_work() - Schedule work for a FIP ctlr's workqueue
708 * @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue
709 * @work: Work to queue for execution
710 *
711 * Return value:
712 * 1 on success / 0 already queued / < 0 for error
713 */
714static int fcoe_ctlr_device_queue_work(struct fcoe_ctlr_device *ctlr,
715 struct work_struct *work)
716{
717 if (unlikely(!fcoe_ctlr_work_q(ctlr))) {
718 printk(KERN_ERR
719 "ERROR: FIP Ctlr '%d' attempted to queue work, "
720 "when no workqueue created.\n", ctlr->id);
721 dump_stack();
722
723 return -EINVAL;
724 }
725
726 return queue_work(fcoe_ctlr_work_q(ctlr), work);
727}
728
729/**
730 * fcoe_ctlr_device_flush_devloss() - Flush a FIP ctlr's devloss workqueue
731 * @ctlr: Pointer to FIP ctlr whose workqueue is to be flushed
732 */
733static void fcoe_ctlr_device_flush_devloss(struct fcoe_ctlr_device *ctlr)
734{
735 if (!fcoe_ctlr_devloss_work_q(ctlr)) {
736 printk(KERN_ERR
737 "ERROR: FIP Ctlr '%d' attempted to flush work, "
738 "when no workqueue created.\n", ctlr->id);
739 dump_stack();
740 return;
741 }
742
743 flush_workqueue(fcoe_ctlr_devloss_work_q(ctlr));
744}
745
746/**
747 * fcoe_ctlr_device_queue_devloss_work() - Schedule work for a FIP ctlr's devloss workqueue
748 * @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue
749 * @work: Work to queue for execution
750 * @delay: jiffies to delay the work queuing
751 *
752 * Return value:
753 * 1 on success / 0 already queued / < 0 for error
754 */
755static int fcoe_ctlr_device_queue_devloss_work(struct fcoe_ctlr_device *ctlr,
756 struct delayed_work *work,
757 unsigned long delay)
758{
759 if (unlikely(!fcoe_ctlr_devloss_work_q(ctlr))) {
760 printk(KERN_ERR
761 "ERROR: FIP Ctlr '%d' attempted to queue work, "
762 "when no workqueue created.\n", ctlr->id);
763 dump_stack();
764
765 return -EINVAL;
766 }
767
768 return queue_delayed_work(fcoe_ctlr_devloss_work_q(ctlr), dwork: work, delay);
769}
770
771static int fcoe_fcf_device_match(struct fcoe_fcf_device *new,
772 struct fcoe_fcf_device *old)
773{
774 if (new->switch_name == old->switch_name &&
775 new->fabric_name == old->fabric_name &&
776 new->fc_map == old->fc_map &&
777 ether_addr_equal(addr1: new->mac, addr2: old->mac))
778 return 1;
779 return 0;
780}
781
782/**
783 * fcoe_ctlr_device_add() - Add a FIP ctlr to sysfs
784 * @parent: The parent device to which the fcoe_ctlr instance
785 * should be attached
786 * @f: The LLD's FCoE sysfs function template pointer
787 * @priv_size: Size to be allocated with the fcoe_ctlr_device for the LLD
788 *
789 * This routine allocates a FIP ctlr object with some additional memory
790 * for the LLD. The FIP ctlr is initialized, added to sysfs and then
791 * attributes are added to it.
792 */
793struct fcoe_ctlr_device *fcoe_ctlr_device_add(struct device *parent,
794 struct fcoe_sysfs_function_template *f,
795 int priv_size)
796{
797 struct fcoe_ctlr_device *ctlr;
798 int error = 0;
799
800 ctlr = kzalloc(size: sizeof(struct fcoe_ctlr_device) + priv_size,
801 GFP_KERNEL);
802 if (!ctlr)
803 goto out;
804
805 ctlr->id = atomic_inc_return(v: &ctlr_num) - 1;
806 ctlr->f = f;
807 ctlr->mode = FIP_CONN_TYPE_FABRIC;
808 INIT_LIST_HEAD(list: &ctlr->fcfs);
809 mutex_init(&ctlr->lock);
810 ctlr->dev.parent = parent;
811 ctlr->dev.bus = &fcoe_bus_type;
812 ctlr->dev.type = &fcoe_ctlr_device_type;
813
814 ctlr->fcf_dev_loss_tmo = fcoe_fcf_dev_loss_tmo;
815
816 snprintf(buf: ctlr->work_q_name, size: sizeof(ctlr->work_q_name),
817 fmt: "ctlr_wq_%d", ctlr->id);
818 ctlr->work_q = create_singlethread_workqueue(
819 ctlr->work_q_name);
820 if (!ctlr->work_q)
821 goto out_del;
822
823 snprintf(buf: ctlr->devloss_work_q_name,
824 size: sizeof(ctlr->devloss_work_q_name),
825 fmt: "ctlr_dl_wq_%d", ctlr->id);
826 ctlr->devloss_work_q = create_singlethread_workqueue(
827 ctlr->devloss_work_q_name);
828 if (!ctlr->devloss_work_q)
829 goto out_del_q;
830
831 dev_set_name(dev: &ctlr->dev, name: "ctlr_%d", ctlr->id);
832 error = device_register(dev: &ctlr->dev);
833 if (error) {
834 destroy_workqueue(wq: ctlr->devloss_work_q);
835 destroy_workqueue(wq: ctlr->work_q);
836 put_device(dev: &ctlr->dev);
837 return NULL;
838 }
839
840 return ctlr;
841
842out_del_q:
843 destroy_workqueue(wq: ctlr->work_q);
844 ctlr->work_q = NULL;
845out_del:
846 kfree(objp: ctlr);
847out:
848 return NULL;
849}
850EXPORT_SYMBOL_GPL(fcoe_ctlr_device_add);
851
852/**
853 * fcoe_ctlr_device_delete() - Delete a FIP ctlr and its subtree from sysfs
854 * @ctlr: A pointer to the ctlr to be deleted
855 *
856 * Deletes a FIP ctlr and any fcfs attached
857 * to it. Deleting fcfs will cause their childen
858 * to be deleted as well.
859 *
860 * The ctlr is detached from sysfs and it's resources
861 * are freed (work q), but the memory is not freed
862 * until its last reference is released.
863 *
864 * This routine expects no locks to be held before
865 * calling.
866 *
867 * TODO: Currently there are no callbacks to clean up LLD data
868 * for a fcoe_fcf_device. LLDs must keep this in mind as they need
869 * to clean up each of their LLD data for all fcoe_fcf_device before
870 * calling fcoe_ctlr_device_delete.
871 */
872void fcoe_ctlr_device_delete(struct fcoe_ctlr_device *ctlr)
873{
874 struct fcoe_fcf_device *fcf, *next;
875 /* Remove any attached fcfs */
876 mutex_lock(&ctlr->lock);
877 list_for_each_entry_safe(fcf, next,
878 &ctlr->fcfs, peers) {
879 list_del(entry: &fcf->peers);
880 fcf->state = FCOE_FCF_STATE_DELETED;
881 fcoe_ctlr_device_queue_work(ctlr, work: &fcf->delete_work);
882 }
883 mutex_unlock(lock: &ctlr->lock);
884
885 fcoe_ctlr_device_flush_work(ctlr);
886
887 destroy_workqueue(wq: ctlr->devloss_work_q);
888 ctlr->devloss_work_q = NULL;
889 destroy_workqueue(wq: ctlr->work_q);
890 ctlr->work_q = NULL;
891
892 device_unregister(dev: &ctlr->dev);
893}
894EXPORT_SYMBOL_GPL(fcoe_ctlr_device_delete);
895
896/**
897 * fcoe_fcf_device_final_delete() - Final delete routine
898 * @work: The FIP fcf's embedded work struct
899 *
900 * It is expected that the fcf has been removed from
901 * the FIP ctlr's list before calling this routine.
902 */
903static void fcoe_fcf_device_final_delete(struct work_struct *work)
904{
905 struct fcoe_fcf_device *fcf =
906 container_of(work, struct fcoe_fcf_device, delete_work);
907 struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
908
909 /*
910 * Cancel any outstanding timers. These should really exist
911 * only when rmmod'ing the LLDD and we're asking for
912 * immediate termination of the rports
913 */
914 if (!cancel_delayed_work(dwork: &fcf->dev_loss_work))
915 fcoe_ctlr_device_flush_devloss(ctlr);
916
917 device_unregister(dev: &fcf->dev);
918}
919
920/**
921 * fip_timeout_deleted_fcf() - Delete a fcf when the devloss timer fires
922 * @work: The FIP fcf's embedded work struct
923 *
924 * Removes the fcf from the FIP ctlr's list of fcfs and
925 * queues the final deletion.
926 */
927static void fip_timeout_deleted_fcf(struct work_struct *work)
928{
929 struct fcoe_fcf_device *fcf =
930 container_of(work, struct fcoe_fcf_device, dev_loss_work.work);
931 struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
932
933 mutex_lock(&ctlr->lock);
934
935 /*
936 * If the fcf is deleted or reconnected before the timer
937 * fires the devloss queue will be flushed, but the state will
938 * either be CONNECTED or DELETED. If that is the case we
939 * cancel deleting the fcf.
940 */
941 if (fcf->state != FCOE_FCF_STATE_DISCONNECTED)
942 goto out;
943
944 dev_printk(KERN_ERR, &fcf->dev,
945 "FIP fcf connection time out: removing fcf\n");
946
947 list_del(entry: &fcf->peers);
948 fcf->state = FCOE_FCF_STATE_DELETED;
949 fcoe_ctlr_device_queue_work(ctlr, work: &fcf->delete_work);
950
951out:
952 mutex_unlock(lock: &ctlr->lock);
953}
954
955/**
956 * fcoe_fcf_device_delete() - Delete a FIP fcf
957 * @fcf: Pointer to the fcf which is to be deleted
958 *
959 * Queues the FIP fcf on the devloss workqueue
960 *
961 * Expects the ctlr_attrs mutex to be held for fcf
962 * state change.
963 */
964void fcoe_fcf_device_delete(struct fcoe_fcf_device *fcf)
965{
966 struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
967 int timeout = fcf->dev_loss_tmo;
968
969 if (fcf->state != FCOE_FCF_STATE_CONNECTED)
970 return;
971
972 fcf->state = FCOE_FCF_STATE_DISCONNECTED;
973
974 /*
975 * FCF will only be re-connected by the LLD calling
976 * fcoe_fcf_device_add, and it should be setting up
977 * priv then.
978 */
979 fcf->priv = NULL;
980
981 fcoe_ctlr_device_queue_devloss_work(ctlr, work: &fcf->dev_loss_work,
982 delay: timeout * HZ);
983}
984EXPORT_SYMBOL_GPL(fcoe_fcf_device_delete);
985
986/**
987 * fcoe_fcf_device_add() - Add a FCoE sysfs fcoe_fcf_device to the system
988 * @ctlr: The fcoe_ctlr_device that will be the fcoe_fcf_device parent
989 * @new_fcf: A temporary FCF used for lookups on the current list of fcfs
990 *
991 * Expects to be called with the ctlr->lock held
992 */
993struct fcoe_fcf_device *fcoe_fcf_device_add(struct fcoe_ctlr_device *ctlr,
994 struct fcoe_fcf_device *new_fcf)
995{
996 struct fcoe_fcf_device *fcf;
997 int error = 0;
998
999 list_for_each_entry(fcf, &ctlr->fcfs, peers) {
1000 if (fcoe_fcf_device_match(new: new_fcf, old: fcf)) {
1001 if (fcf->state == FCOE_FCF_STATE_CONNECTED)
1002 return fcf;
1003
1004 fcf->state = FCOE_FCF_STATE_CONNECTED;
1005
1006 if (!cancel_delayed_work(dwork: &fcf->dev_loss_work))
1007 fcoe_ctlr_device_flush_devloss(ctlr);
1008
1009 return fcf;
1010 }
1011 }
1012
1013 fcf = kzalloc(size: sizeof(struct fcoe_fcf_device), GFP_ATOMIC);
1014 if (unlikely(!fcf))
1015 goto out;
1016
1017 INIT_WORK(&fcf->delete_work, fcoe_fcf_device_final_delete);
1018 INIT_DELAYED_WORK(&fcf->dev_loss_work, fip_timeout_deleted_fcf);
1019
1020 fcf->dev.parent = &ctlr->dev;
1021 fcf->dev.bus = &fcoe_bus_type;
1022 fcf->dev.type = &fcoe_fcf_device_type;
1023 fcf->id = atomic_inc_return(v: &fcf_num) - 1;
1024 fcf->state = FCOE_FCF_STATE_UNKNOWN;
1025
1026 fcf->dev_loss_tmo = ctlr->fcf_dev_loss_tmo;
1027
1028 dev_set_name(dev: &fcf->dev, name: "fcf_%d", fcf->id);
1029
1030 fcf->fabric_name = new_fcf->fabric_name;
1031 fcf->switch_name = new_fcf->switch_name;
1032 fcf->fc_map = new_fcf->fc_map;
1033 fcf->vfid = new_fcf->vfid;
1034 memcpy(fcf->mac, new_fcf->mac, ETH_ALEN);
1035 fcf->priority = new_fcf->priority;
1036 fcf->fka_period = new_fcf->fka_period;
1037 fcf->selected = new_fcf->selected;
1038
1039 error = device_register(dev: &fcf->dev);
1040 if (error) {
1041 put_device(dev: &fcf->dev);
1042 goto out;
1043 }
1044
1045 fcf->state = FCOE_FCF_STATE_CONNECTED;
1046 list_add_tail(new: &fcf->peers, head: &ctlr->fcfs);
1047
1048 return fcf;
1049
1050out:
1051 return NULL;
1052}
1053EXPORT_SYMBOL_GPL(fcoe_fcf_device_add);
1054
1055int __init fcoe_sysfs_setup(void)
1056{
1057 atomic_set(v: &ctlr_num, i: 0);
1058 atomic_set(v: &fcf_num, i: 0);
1059
1060 return bus_register(bus: &fcoe_bus_type);
1061}
1062
1063void __exit fcoe_sysfs_teardown(void)
1064{
1065 bus_unregister(bus: &fcoe_bus_type);
1066}
1067

source code of linux/drivers/scsi/fcoe/fcoe_sysfs.c