Loading...
Note: File does not exist in v3.1.
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#include <linux/string.h>
14
15#include <scsi/fcoe_sysfs.h>
16#include <scsi/libfcoe.h>
17
18/*
19 * OK to include local libfcoe.h for debug_logging, but cannot include
20 * <scsi/libfcoe.h> otherwise non-netdev based fcoe solutions would have
21 * have to include more than fcoe_sysfs.h.
22 */
23#include "libfcoe.h"
24
25static atomic_t ctlr_num;
26static atomic_t fcf_num;
27
28/*
29 * fcoe_fcf_dev_loss_tmo: the default number of seconds that fcoe sysfs
30 * should insulate the loss of a fcf.
31 */
32static unsigned int fcoe_fcf_dev_loss_tmo = 1800; /* seconds */
33
34module_param_named(fcf_dev_loss_tmo, fcoe_fcf_dev_loss_tmo,
35 uint, S_IRUGO|S_IWUSR);
36MODULE_PARM_DESC(fcf_dev_loss_tmo,
37 "Maximum number of seconds that libfcoe should"
38 " insulate the loss of a fcf. Once this value is"
39 " exceeded, the fcf is removed.");
40
41/*
42 * These are used by the fcoe_*_show_function routines, they
43 * are intentionally placed in the .c file as they're not intended
44 * for use throughout the code.
45 */
46#define fcoe_ctlr_id(x) \
47 ((x)->id)
48#define fcoe_ctlr_work_q_name(x) \
49 ((x)->work_q_name)
50#define fcoe_ctlr_work_q(x) \
51 ((x)->work_q)
52#define fcoe_ctlr_devloss_work_q_name(x) \
53 ((x)->devloss_work_q_name)
54#define fcoe_ctlr_devloss_work_q(x) \
55 ((x)->devloss_work_q)
56#define fcoe_ctlr_mode(x) \
57 ((x)->mode)
58#define fcoe_ctlr_fcf_dev_loss_tmo(x) \
59 ((x)->fcf_dev_loss_tmo)
60#define fcoe_ctlr_link_fail(x) \
61 ((x)->lesb.lesb_link_fail)
62#define fcoe_ctlr_vlink_fail(x) \
63 ((x)->lesb.lesb_vlink_fail)
64#define fcoe_ctlr_miss_fka(x) \
65 ((x)->lesb.lesb_miss_fka)
66#define fcoe_ctlr_symb_err(x) \
67 ((x)->lesb.lesb_symb_err)
68#define fcoe_ctlr_err_block(x) \
69 ((x)->lesb.lesb_err_block)
70#define fcoe_ctlr_fcs_error(x) \
71 ((x)->lesb.lesb_fcs_error)
72#define fcoe_ctlr_enabled(x) \
73 ((x)->enabled)
74#define fcoe_fcf_state(x) \
75 ((x)->state)
76#define fcoe_fcf_fabric_name(x) \
77 ((x)->fabric_name)
78#define fcoe_fcf_switch_name(x) \
79 ((x)->switch_name)
80#define fcoe_fcf_fc_map(x) \
81 ((x)->fc_map)
82#define fcoe_fcf_vfid(x) \
83 ((x)->vfid)
84#define fcoe_fcf_mac(x) \
85 ((x)->mac)
86#define fcoe_fcf_priority(x) \
87 ((x)->priority)
88#define fcoe_fcf_fka_period(x) \
89 ((x)->fka_period)
90#define fcoe_fcf_dev_loss_tmo(x) \
91 ((x)->dev_loss_tmo)
92#define fcoe_fcf_selected(x) \
93 ((x)->selected)
94#define fcoe_fcf_vlan_id(x) \
95 ((x)->vlan_id)
96
97/*
98 * dev_loss_tmo attribute
99 */
100static int fcoe_str_to_dev_loss(const char *buf, unsigned long *val)
101{
102 int ret;
103
104 ret = kstrtoul(buf, 0, val);
105 if (ret)
106 return -EINVAL;
107 /*
108 * Check for overflow; dev_loss_tmo is u32
109 */
110 if (*val > UINT_MAX)
111 return -EINVAL;
112
113 return 0;
114}
115
116static int fcoe_fcf_set_dev_loss_tmo(struct fcoe_fcf_device *fcf,
117 unsigned long val)
118{
119 if ((fcf->state == FCOE_FCF_STATE_UNKNOWN) ||
120 (fcf->state == FCOE_FCF_STATE_DISCONNECTED) ||
121 (fcf->state == FCOE_FCF_STATE_DELETED))
122 return -EBUSY;
123 /*
124 * Check for overflow; dev_loss_tmo is u32
125 */
126 if (val > UINT_MAX)
127 return -EINVAL;
128
129 fcoe_fcf_dev_loss_tmo(fcf) = val;
130 return 0;
131}
132
133#define FCOE_DEVICE_ATTR(_prefix, _name, _mode, _show, _store) \
134struct device_attribute device_attr_fcoe_##_prefix##_##_name = \
135 __ATTR(_name, _mode, _show, _store)
136
137#define fcoe_ctlr_show_function(field, format_string, sz, cast) \
138static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
139 struct device_attribute *attr, \
140 char *buf) \
141{ \
142 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); \
143 if (ctlr->f->get_fcoe_ctlr_##field) \
144 ctlr->f->get_fcoe_ctlr_##field(ctlr); \
145 return snprintf(buf, sz, format_string, \
146 cast fcoe_ctlr_##field(ctlr)); \
147}
148
149#define fcoe_fcf_show_function(field, format_string, sz, cast) \
150static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \
151 struct device_attribute *attr, \
152 char *buf) \
153{ \
154 struct fcoe_fcf_device *fcf = dev_to_fcf(dev); \
155 struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf); \
156 if (ctlr->f->get_fcoe_fcf_##field) \
157 ctlr->f->get_fcoe_fcf_##field(fcf); \
158 return snprintf(buf, sz, format_string, \
159 cast fcoe_fcf_##field(fcf)); \
160}
161
162#define fcoe_ctlr_private_show_function(field, format_string, sz, cast) \
163static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
164 struct device_attribute *attr, \
165 char *buf) \
166{ \
167 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); \
168 return snprintf(buf, sz, format_string, cast fcoe_ctlr_##field(ctlr)); \
169}
170
171#define fcoe_fcf_private_show_function(field, format_string, sz, cast) \
172static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \
173 struct device_attribute *attr, \
174 char *buf) \
175{ \
176 struct fcoe_fcf_device *fcf = dev_to_fcf(dev); \
177 return snprintf(buf, sz, format_string, cast fcoe_fcf_##field(fcf)); \
178}
179
180#define fcoe_ctlr_private_rd_attr(field, format_string, sz) \
181 fcoe_ctlr_private_show_function(field, format_string, sz, ) \
182 static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \
183 show_fcoe_ctlr_device_##field, NULL)
184
185#define fcoe_ctlr_rd_attr(field, format_string, sz) \
186 fcoe_ctlr_show_function(field, format_string, sz, ) \
187 static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \
188 show_fcoe_ctlr_device_##field, NULL)
189
190#define fcoe_fcf_rd_attr(field, format_string, sz) \
191 fcoe_fcf_show_function(field, format_string, sz, ) \
192 static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \
193 show_fcoe_fcf_device_##field, NULL)
194
195#define fcoe_fcf_private_rd_attr(field, format_string, sz) \
196 fcoe_fcf_private_show_function(field, format_string, sz, ) \
197 static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \
198 show_fcoe_fcf_device_##field, NULL)
199
200#define fcoe_ctlr_private_rd_attr_cast(field, format_string, sz, cast) \
201 fcoe_ctlr_private_show_function(field, format_string, sz, (cast)) \
202 static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \
203 show_fcoe_ctlr_device_##field, NULL)
204
205#define fcoe_fcf_private_rd_attr_cast(field, format_string, sz, cast) \
206 fcoe_fcf_private_show_function(field, format_string, sz, (cast)) \
207 static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \
208 show_fcoe_fcf_device_##field, NULL)
209
210#define fcoe_enum_name_search(title, table_type, table) \
211static const char *get_fcoe_##title##_name(enum table_type table_key) \
212{ \
213 if (table_key < 0 || table_key >= ARRAY_SIZE(table)) \
214 return NULL; \
215 return table[table_key]; \
216}
217
218static const char * const fip_conn_type_names[] = {
219 [ FIP_CONN_TYPE_UNKNOWN ] = "Unknown",
220 [ FIP_CONN_TYPE_FABRIC ] = "Fabric",
221 [ FIP_CONN_TYPE_VN2VN ] = "VN2VN",
222};
223fcoe_enum_name_search(ctlr_mode, fip_conn_type, fip_conn_type_names)
224
225static char *fcf_state_names[] = {
226 [ FCOE_FCF_STATE_UNKNOWN ] = "Unknown",
227 [ FCOE_FCF_STATE_DISCONNECTED ] = "Disconnected",
228 [ FCOE_FCF_STATE_CONNECTED ] = "Connected",
229};
230fcoe_enum_name_search(fcf_state, fcf_state, fcf_state_names)
231#define FCOE_FCF_STATE_MAX_NAMELEN 50
232
233static ssize_t show_fcf_state(struct device *dev,
234 struct device_attribute *attr,
235 char *buf)
236{
237 struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
238 const char *name;
239 name = get_fcoe_fcf_state_name(fcf->state);
240 if (!name)
241 return -EINVAL;
242 return snprintf(buf, FCOE_FCF_STATE_MAX_NAMELEN, "%s\n", name);
243}
244static FCOE_DEVICE_ATTR(fcf, state, S_IRUGO, show_fcf_state, NULL);
245
246#define FCOE_MAX_MODENAME_LEN 20
247static ssize_t show_ctlr_mode(struct device *dev,
248 struct device_attribute *attr,
249 char *buf)
250{
251 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
252 const char *name;
253
254 name = get_fcoe_ctlr_mode_name(ctlr->mode);
255 if (!name)
256 return -EINVAL;
257 return snprintf(buf, FCOE_MAX_MODENAME_LEN,
258 "%s\n", name);
259}
260
261static ssize_t store_ctlr_mode(struct device *dev,
262 struct device_attribute *attr,
263 const char *buf, size_t count)
264{
265 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
266 int res;
267
268 if (count > FCOE_MAX_MODENAME_LEN)
269 return -EINVAL;
270
271
272 switch (ctlr->enabled) {
273 case FCOE_CTLR_ENABLED:
274 LIBFCOE_SYSFS_DBG(ctlr, "Cannot change mode when enabled.\n");
275 return -EBUSY;
276 case FCOE_CTLR_DISABLED:
277 if (!ctlr->f->set_fcoe_ctlr_mode) {
278 LIBFCOE_SYSFS_DBG(ctlr,
279 "Mode change not supported by LLD.\n");
280 return -ENOTSUPP;
281 }
282
283 res = sysfs_match_string(fip_conn_type_names, buf);
284 if (res < 0 || res == FIP_CONN_TYPE_UNKNOWN) {
285 LIBFCOE_SYSFS_DBG(ctlr, "Unknown mode %s provided.\n",
286 buf);
287 return -EINVAL;
288 }
289 ctlr->mode = res;
290
291 ctlr->f->set_fcoe_ctlr_mode(ctlr);
292 LIBFCOE_SYSFS_DBG(ctlr, "Mode changed to %s.\n", buf);
293
294 return count;
295 case FCOE_CTLR_UNUSED:
296 default:
297 LIBFCOE_SYSFS_DBG(ctlr, "Mode change not supported.\n");
298 return -ENOTSUPP;
299 }
300}
301
302static FCOE_DEVICE_ATTR(ctlr, mode, S_IRUGO | S_IWUSR,
303 show_ctlr_mode, store_ctlr_mode);
304
305static ssize_t store_ctlr_enabled(struct device *dev,
306 struct device_attribute *attr,
307 const char *buf, size_t count)
308{
309 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
310 bool enabled;
311 int rc;
312
313 if (*buf == '1')
314 enabled = true;
315 else if (*buf == '0')
316 enabled = false;
317 else
318 return -EINVAL;
319
320 switch (ctlr->enabled) {
321 case FCOE_CTLR_ENABLED:
322 if (enabled)
323 return count;
324 ctlr->enabled = FCOE_CTLR_DISABLED;
325 break;
326 case FCOE_CTLR_DISABLED:
327 if (!enabled)
328 return count;
329 ctlr->enabled = FCOE_CTLR_ENABLED;
330 break;
331 case FCOE_CTLR_UNUSED:
332 return -ENOTSUPP;
333 }
334
335 rc = ctlr->f->set_fcoe_ctlr_enabled(ctlr);
336 if (rc)
337 return rc;
338
339 return count;
340}
341
342static char *ctlr_enabled_state_names[] = {
343 [ FCOE_CTLR_ENABLED ] = "1",
344 [ FCOE_CTLR_DISABLED ] = "0",
345};
346fcoe_enum_name_search(ctlr_enabled_state, ctlr_enabled_state,
347 ctlr_enabled_state_names)
348#define FCOE_CTLR_ENABLED_MAX_NAMELEN 50
349
350static ssize_t show_ctlr_enabled_state(struct device *dev,
351 struct device_attribute *attr,
352 char *buf)
353{
354 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
355 const char *name;
356
357 name = get_fcoe_ctlr_enabled_state_name(ctlr->enabled);
358 if (!name)
359 return -EINVAL;
360 return snprintf(buf, FCOE_CTLR_ENABLED_MAX_NAMELEN,
361 "%s\n", name);
362}
363
364static FCOE_DEVICE_ATTR(ctlr, enabled, S_IRUGO | S_IWUSR,
365 show_ctlr_enabled_state,
366 store_ctlr_enabled);
367
368static ssize_t store_ctlr_fip_resp(struct device *dev,
369 struct device_attribute *attr,
370 const char *buf, size_t count)
371{
372 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
373 struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr);
374
375 mutex_lock(&fip->ctlr_mutex);
376 if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
377 if (buf[0] == '1') {
378 fip->fip_resp = 1;
379 mutex_unlock(&fip->ctlr_mutex);
380 return count;
381 }
382 if (buf[0] == '0') {
383 fip->fip_resp = 0;
384 mutex_unlock(&fip->ctlr_mutex);
385 return count;
386 }
387 }
388 mutex_unlock(&fip->ctlr_mutex);
389 return -EINVAL;
390}
391
392static ssize_t show_ctlr_fip_resp(struct device *dev,
393 struct device_attribute *attr,
394 char *buf)
395{
396 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
397 struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr);
398
399 return sprintf(buf, "%d\n", fip->fip_resp ? 1 : 0);
400}
401
402static FCOE_DEVICE_ATTR(ctlr, fip_vlan_responder, S_IRUGO | S_IWUSR,
403 show_ctlr_fip_resp,
404 store_ctlr_fip_resp);
405
406static ssize_t
407fcoe_ctlr_var_store(u32 *var, const char *buf, size_t count)
408{
409 int err;
410 unsigned long v;
411
412 err = kstrtoul(buf, 10, &v);
413 if (err || v > UINT_MAX)
414 return -EINVAL;
415
416 *var = v;
417
418 return count;
419}
420
421static ssize_t store_ctlr_r_a_tov(struct device *dev,
422 struct device_attribute *attr,
423 const char *buf, size_t count)
424{
425 struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
426 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
427
428 if (ctlr_dev->enabled == FCOE_CTLR_ENABLED)
429 return -EBUSY;
430 if (ctlr_dev->enabled == FCOE_CTLR_DISABLED)
431 return fcoe_ctlr_var_store(&ctlr->lp->r_a_tov, buf, count);
432 return -ENOTSUPP;
433}
434
435static ssize_t show_ctlr_r_a_tov(struct device *dev,
436 struct device_attribute *attr,
437 char *buf)
438{
439 struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
440 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
441
442 return sprintf(buf, "%d\n", ctlr->lp->r_a_tov);
443}
444
445static FCOE_DEVICE_ATTR(ctlr, r_a_tov, S_IRUGO | S_IWUSR,
446 show_ctlr_r_a_tov, store_ctlr_r_a_tov);
447
448static ssize_t store_ctlr_e_d_tov(struct device *dev,
449 struct device_attribute *attr,
450 const char *buf, size_t count)
451{
452 struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
453 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
454
455 if (ctlr_dev->enabled == FCOE_CTLR_ENABLED)
456 return -EBUSY;
457 if (ctlr_dev->enabled == FCOE_CTLR_DISABLED)
458 return fcoe_ctlr_var_store(&ctlr->lp->e_d_tov, buf, count);
459 return -ENOTSUPP;
460}
461
462static ssize_t show_ctlr_e_d_tov(struct device *dev,
463 struct device_attribute *attr,
464 char *buf)
465{
466 struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
467 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
468
469 return sprintf(buf, "%d\n", ctlr->lp->e_d_tov);
470}
471
472static FCOE_DEVICE_ATTR(ctlr, e_d_tov, S_IRUGO | S_IWUSR,
473 show_ctlr_e_d_tov, store_ctlr_e_d_tov);
474
475static ssize_t
476store_private_fcoe_ctlr_fcf_dev_loss_tmo(struct device *dev,
477 struct device_attribute *attr,
478 const char *buf, size_t count)
479{
480 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
481 struct fcoe_fcf_device *fcf;
482 unsigned long val;
483 int rc;
484
485 rc = fcoe_str_to_dev_loss(buf, &val);
486 if (rc)
487 return rc;
488
489 fcoe_ctlr_fcf_dev_loss_tmo(ctlr) = val;
490 mutex_lock(&ctlr->lock);
491 list_for_each_entry(fcf, &ctlr->fcfs, peers)
492 fcoe_fcf_set_dev_loss_tmo(fcf, val);
493 mutex_unlock(&ctlr->lock);
494 return count;
495}
496fcoe_ctlr_private_show_function(fcf_dev_loss_tmo, "%d\n", 20, );
497static FCOE_DEVICE_ATTR(ctlr, fcf_dev_loss_tmo, S_IRUGO | S_IWUSR,
498 show_fcoe_ctlr_device_fcf_dev_loss_tmo,
499 store_private_fcoe_ctlr_fcf_dev_loss_tmo);
500
501/* Link Error Status Block (LESB) */
502fcoe_ctlr_rd_attr(link_fail, "%u\n", 20);
503fcoe_ctlr_rd_attr(vlink_fail, "%u\n", 20);
504fcoe_ctlr_rd_attr(miss_fka, "%u\n", 20);
505fcoe_ctlr_rd_attr(symb_err, "%u\n", 20);
506fcoe_ctlr_rd_attr(err_block, "%u\n", 20);
507fcoe_ctlr_rd_attr(fcs_error, "%u\n", 20);
508
509fcoe_fcf_private_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
510fcoe_fcf_private_rd_attr_cast(switch_name, "0x%llx\n", 20, unsigned long long);
511fcoe_fcf_private_rd_attr(priority, "%u\n", 20);
512fcoe_fcf_private_rd_attr(fc_map, "0x%x\n", 20);
513fcoe_fcf_private_rd_attr(vfid, "%u\n", 20);
514fcoe_fcf_private_rd_attr(mac, "%pM\n", 20);
515fcoe_fcf_private_rd_attr(fka_period, "%u\n", 20);
516fcoe_fcf_rd_attr(selected, "%u\n", 20);
517fcoe_fcf_rd_attr(vlan_id, "%u\n", 20);
518
519fcoe_fcf_private_show_function(dev_loss_tmo, "%d\n", 20, )
520static ssize_t
521store_fcoe_fcf_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
522 const char *buf, size_t count)
523{
524 struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
525 unsigned long val;
526 int rc;
527
528 rc = fcoe_str_to_dev_loss(buf, &val);
529 if (rc)
530 return rc;
531
532 rc = fcoe_fcf_set_dev_loss_tmo(fcf, val);
533 if (rc)
534 return rc;
535 return count;
536}
537static FCOE_DEVICE_ATTR(fcf, dev_loss_tmo, S_IRUGO | S_IWUSR,
538 show_fcoe_fcf_device_dev_loss_tmo,
539 store_fcoe_fcf_dev_loss_tmo);
540
541static struct attribute *fcoe_ctlr_lesb_attrs[] = {
542 &device_attr_fcoe_ctlr_link_fail.attr,
543 &device_attr_fcoe_ctlr_vlink_fail.attr,
544 &device_attr_fcoe_ctlr_miss_fka.attr,
545 &device_attr_fcoe_ctlr_symb_err.attr,
546 &device_attr_fcoe_ctlr_err_block.attr,
547 &device_attr_fcoe_ctlr_fcs_error.attr,
548 NULL,
549};
550
551static struct attribute_group fcoe_ctlr_lesb_attr_group = {
552 .name = "lesb",
553 .attrs = fcoe_ctlr_lesb_attrs,
554};
555
556static struct attribute *fcoe_ctlr_attrs[] = {
557 &device_attr_fcoe_ctlr_fip_vlan_responder.attr,
558 &device_attr_fcoe_ctlr_fcf_dev_loss_tmo.attr,
559 &device_attr_fcoe_ctlr_r_a_tov.attr,
560 &device_attr_fcoe_ctlr_e_d_tov.attr,
561 &device_attr_fcoe_ctlr_enabled.attr,
562 &device_attr_fcoe_ctlr_mode.attr,
563 NULL,
564};
565
566static struct attribute_group fcoe_ctlr_attr_group = {
567 .attrs = fcoe_ctlr_attrs,
568};
569
570static const struct attribute_group *fcoe_ctlr_attr_groups[] = {
571 &fcoe_ctlr_attr_group,
572 &fcoe_ctlr_lesb_attr_group,
573 NULL,
574};
575
576static struct attribute *fcoe_fcf_attrs[] = {
577 &device_attr_fcoe_fcf_fabric_name.attr,
578 &device_attr_fcoe_fcf_switch_name.attr,
579 &device_attr_fcoe_fcf_dev_loss_tmo.attr,
580 &device_attr_fcoe_fcf_fc_map.attr,
581 &device_attr_fcoe_fcf_vfid.attr,
582 &device_attr_fcoe_fcf_mac.attr,
583 &device_attr_fcoe_fcf_priority.attr,
584 &device_attr_fcoe_fcf_fka_period.attr,
585 &device_attr_fcoe_fcf_state.attr,
586 &device_attr_fcoe_fcf_selected.attr,
587 &device_attr_fcoe_fcf_vlan_id.attr,
588 NULL
589};
590
591static struct attribute_group fcoe_fcf_attr_group = {
592 .attrs = fcoe_fcf_attrs,
593};
594
595static const struct attribute_group *fcoe_fcf_attr_groups[] = {
596 &fcoe_fcf_attr_group,
597 NULL,
598};
599
600static struct bus_type fcoe_bus_type;
601
602static int fcoe_bus_match(struct device *dev,
603 struct device_driver *drv)
604{
605 if (dev->bus == &fcoe_bus_type)
606 return 1;
607 return 0;
608}
609
610/**
611 * fcoe_ctlr_device_release() - Release the FIP ctlr memory
612 * @dev: Pointer to the FIP ctlr's embedded device
613 *
614 * Called when the last FIP ctlr reference is released.
615 */
616static void fcoe_ctlr_device_release(struct device *dev)
617{
618 struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
619 kfree(ctlr);
620}
621
622/**
623 * fcoe_fcf_device_release() - Release the FIP fcf memory
624 * @dev: Pointer to the fcf's embedded device
625 *
626 * Called when the last FIP fcf reference is released.
627 */
628static void fcoe_fcf_device_release(struct device *dev)
629{
630 struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
631 kfree(fcf);
632}
633
634static const struct device_type fcoe_ctlr_device_type = {
635 .name = "fcoe_ctlr",
636 .groups = fcoe_ctlr_attr_groups,
637 .release = fcoe_ctlr_device_release,
638};
639
640static const struct device_type fcoe_fcf_device_type = {
641 .name = "fcoe_fcf",
642 .groups = fcoe_fcf_attr_groups,
643 .release = fcoe_fcf_device_release,
644};
645
646static ssize_t ctlr_create_store(const struct bus_type *bus, const char *buf,
647 size_t count)
648{
649 return fcoe_ctlr_create_store(buf, count);
650}
651static BUS_ATTR_WO(ctlr_create);
652
653static ssize_t ctlr_destroy_store(const struct bus_type *bus, const char *buf,
654 size_t count)
655{
656 return fcoe_ctlr_destroy_store(buf, count);
657}
658static BUS_ATTR_WO(ctlr_destroy);
659
660static struct attribute *fcoe_bus_attrs[] = {
661 &bus_attr_ctlr_create.attr,
662 &bus_attr_ctlr_destroy.attr,
663 NULL,
664};
665ATTRIBUTE_GROUPS(fcoe_bus);
666
667static struct bus_type fcoe_bus_type = {
668 .name = "fcoe",
669 .match = &fcoe_bus_match,
670 .bus_groups = fcoe_bus_groups,
671};
672
673/**
674 * fcoe_ctlr_device_flush_work() - Flush a FIP ctlr's workqueue
675 * @ctlr: Pointer to the FIP ctlr whose workqueue is to be flushed
676 */
677static void fcoe_ctlr_device_flush_work(struct fcoe_ctlr_device *ctlr)
678{
679 if (!fcoe_ctlr_work_q(ctlr)) {
680 printk(KERN_ERR
681 "ERROR: FIP Ctlr '%d' attempted to flush work, "
682 "when no workqueue created.\n", ctlr->id);
683 dump_stack();
684 return;
685 }
686
687 flush_workqueue(fcoe_ctlr_work_q(ctlr));
688}
689
690/**
691 * fcoe_ctlr_device_queue_work() - Schedule work for a FIP ctlr's workqueue
692 * @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue
693 * @work: Work to queue for execution
694 *
695 * Return value:
696 * 1 on success / 0 already queued / < 0 for error
697 */
698static int fcoe_ctlr_device_queue_work(struct fcoe_ctlr_device *ctlr,
699 struct work_struct *work)
700{
701 if (unlikely(!fcoe_ctlr_work_q(ctlr))) {
702 printk(KERN_ERR
703 "ERROR: FIP Ctlr '%d' attempted to queue work, "
704 "when no workqueue created.\n", ctlr->id);
705 dump_stack();
706
707 return -EINVAL;
708 }
709
710 return queue_work(fcoe_ctlr_work_q(ctlr), work);
711}
712
713/**
714 * fcoe_ctlr_device_flush_devloss() - Flush a FIP ctlr's devloss workqueue
715 * @ctlr: Pointer to FIP ctlr whose workqueue is to be flushed
716 */
717static void fcoe_ctlr_device_flush_devloss(struct fcoe_ctlr_device *ctlr)
718{
719 if (!fcoe_ctlr_devloss_work_q(ctlr)) {
720 printk(KERN_ERR
721 "ERROR: FIP Ctlr '%d' attempted to flush work, "
722 "when no workqueue created.\n", ctlr->id);
723 dump_stack();
724 return;
725 }
726
727 flush_workqueue(fcoe_ctlr_devloss_work_q(ctlr));
728}
729
730/**
731 * fcoe_ctlr_device_queue_devloss_work() - Schedule work for a FIP ctlr's devloss workqueue
732 * @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue
733 * @work: Work to queue for execution
734 * @delay: jiffies to delay the work queuing
735 *
736 * Return value:
737 * 1 on success / 0 already queued / < 0 for error
738 */
739static int fcoe_ctlr_device_queue_devloss_work(struct fcoe_ctlr_device *ctlr,
740 struct delayed_work *work,
741 unsigned long delay)
742{
743 if (unlikely(!fcoe_ctlr_devloss_work_q(ctlr))) {
744 printk(KERN_ERR
745 "ERROR: FIP Ctlr '%d' attempted to queue work, "
746 "when no workqueue created.\n", ctlr->id);
747 dump_stack();
748
749 return -EINVAL;
750 }
751
752 return queue_delayed_work(fcoe_ctlr_devloss_work_q(ctlr), work, delay);
753}
754
755static int fcoe_fcf_device_match(struct fcoe_fcf_device *new,
756 struct fcoe_fcf_device *old)
757{
758 if (new->switch_name == old->switch_name &&
759 new->fabric_name == old->fabric_name &&
760 new->fc_map == old->fc_map &&
761 ether_addr_equal(new->mac, old->mac))
762 return 1;
763 return 0;
764}
765
766/**
767 * fcoe_ctlr_device_add() - Add a FIP ctlr to sysfs
768 * @parent: The parent device to which the fcoe_ctlr instance
769 * should be attached
770 * @f: The LLD's FCoE sysfs function template pointer
771 * @priv_size: Size to be allocated with the fcoe_ctlr_device for the LLD
772 *
773 * This routine allocates a FIP ctlr object with some additional memory
774 * for the LLD. The FIP ctlr is initialized, added to sysfs and then
775 * attributes are added to it.
776 */
777struct fcoe_ctlr_device *fcoe_ctlr_device_add(struct device *parent,
778 struct fcoe_sysfs_function_template *f,
779 int priv_size)
780{
781 struct fcoe_ctlr_device *ctlr;
782 int error = 0;
783
784 ctlr = kzalloc(sizeof(struct fcoe_ctlr_device) + priv_size,
785 GFP_KERNEL);
786 if (!ctlr)
787 goto out;
788
789 ctlr->id = atomic_inc_return(&ctlr_num) - 1;
790 ctlr->f = f;
791 ctlr->mode = FIP_CONN_TYPE_FABRIC;
792 INIT_LIST_HEAD(&ctlr->fcfs);
793 mutex_init(&ctlr->lock);
794 ctlr->dev.parent = parent;
795 ctlr->dev.bus = &fcoe_bus_type;
796 ctlr->dev.type = &fcoe_ctlr_device_type;
797
798 ctlr->fcf_dev_loss_tmo = fcoe_fcf_dev_loss_tmo;
799
800 snprintf(ctlr->work_q_name, sizeof(ctlr->work_q_name),
801 "ctlr_wq_%d", ctlr->id);
802 ctlr->work_q = create_singlethread_workqueue(
803 ctlr->work_q_name);
804 if (!ctlr->work_q)
805 goto out_del;
806
807 snprintf(ctlr->devloss_work_q_name,
808 sizeof(ctlr->devloss_work_q_name),
809 "ctlr_dl_wq_%d", ctlr->id);
810 ctlr->devloss_work_q = create_singlethread_workqueue(
811 ctlr->devloss_work_q_name);
812 if (!ctlr->devloss_work_q)
813 goto out_del_q;
814
815 dev_set_name(&ctlr->dev, "ctlr_%d", ctlr->id);
816 error = device_register(&ctlr->dev);
817 if (error) {
818 destroy_workqueue(ctlr->devloss_work_q);
819 destroy_workqueue(ctlr->work_q);
820 put_device(&ctlr->dev);
821 return NULL;
822 }
823
824 return ctlr;
825
826out_del_q:
827 destroy_workqueue(ctlr->work_q);
828 ctlr->work_q = NULL;
829out_del:
830 kfree(ctlr);
831out:
832 return NULL;
833}
834EXPORT_SYMBOL_GPL(fcoe_ctlr_device_add);
835
836/**
837 * fcoe_ctlr_device_delete() - Delete a FIP ctlr and its subtree from sysfs
838 * @ctlr: A pointer to the ctlr to be deleted
839 *
840 * Deletes a FIP ctlr and any fcfs attached
841 * to it. Deleting fcfs will cause their childen
842 * to be deleted as well.
843 *
844 * The ctlr is detached from sysfs and it's resources
845 * are freed (work q), but the memory is not freed
846 * until its last reference is released.
847 *
848 * This routine expects no locks to be held before
849 * calling.
850 *
851 * TODO: Currently there are no callbacks to clean up LLD data
852 * for a fcoe_fcf_device. LLDs must keep this in mind as they need
853 * to clean up each of their LLD data for all fcoe_fcf_device before
854 * calling fcoe_ctlr_device_delete.
855 */
856void fcoe_ctlr_device_delete(struct fcoe_ctlr_device *ctlr)
857{
858 struct fcoe_fcf_device *fcf, *next;
859 /* Remove any attached fcfs */
860 mutex_lock(&ctlr->lock);
861 list_for_each_entry_safe(fcf, next,
862 &ctlr->fcfs, peers) {
863 list_del(&fcf->peers);
864 fcf->state = FCOE_FCF_STATE_DELETED;
865 fcoe_ctlr_device_queue_work(ctlr, &fcf->delete_work);
866 }
867 mutex_unlock(&ctlr->lock);
868
869 fcoe_ctlr_device_flush_work(ctlr);
870
871 destroy_workqueue(ctlr->devloss_work_q);
872 ctlr->devloss_work_q = NULL;
873 destroy_workqueue(ctlr->work_q);
874 ctlr->work_q = NULL;
875
876 device_unregister(&ctlr->dev);
877}
878EXPORT_SYMBOL_GPL(fcoe_ctlr_device_delete);
879
880/**
881 * fcoe_fcf_device_final_delete() - Final delete routine
882 * @work: The FIP fcf's embedded work struct
883 *
884 * It is expected that the fcf has been removed from
885 * the FIP ctlr's list before calling this routine.
886 */
887static void fcoe_fcf_device_final_delete(struct work_struct *work)
888{
889 struct fcoe_fcf_device *fcf =
890 container_of(work, struct fcoe_fcf_device, delete_work);
891 struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
892
893 /*
894 * Cancel any outstanding timers. These should really exist
895 * only when rmmod'ing the LLDD and we're asking for
896 * immediate termination of the rports
897 */
898 if (!cancel_delayed_work(&fcf->dev_loss_work))
899 fcoe_ctlr_device_flush_devloss(ctlr);
900
901 device_unregister(&fcf->dev);
902}
903
904/**
905 * fip_timeout_deleted_fcf() - Delete a fcf when the devloss timer fires
906 * @work: The FIP fcf's embedded work struct
907 *
908 * Removes the fcf from the FIP ctlr's list of fcfs and
909 * queues the final deletion.
910 */
911static void fip_timeout_deleted_fcf(struct work_struct *work)
912{
913 struct fcoe_fcf_device *fcf =
914 container_of(work, struct fcoe_fcf_device, dev_loss_work.work);
915 struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
916
917 mutex_lock(&ctlr->lock);
918
919 /*
920 * If the fcf is deleted or reconnected before the timer
921 * fires the devloss queue will be flushed, but the state will
922 * either be CONNECTED or DELETED. If that is the case we
923 * cancel deleting the fcf.
924 */
925 if (fcf->state != FCOE_FCF_STATE_DISCONNECTED)
926 goto out;
927
928 dev_printk(KERN_ERR, &fcf->dev,
929 "FIP fcf connection time out: removing fcf\n");
930
931 list_del(&fcf->peers);
932 fcf->state = FCOE_FCF_STATE_DELETED;
933 fcoe_ctlr_device_queue_work(ctlr, &fcf->delete_work);
934
935out:
936 mutex_unlock(&ctlr->lock);
937}
938
939/**
940 * fcoe_fcf_device_delete() - Delete a FIP fcf
941 * @fcf: Pointer to the fcf which is to be deleted
942 *
943 * Queues the FIP fcf on the devloss workqueue
944 *
945 * Expects the ctlr_attrs mutex to be held for fcf
946 * state change.
947 */
948void fcoe_fcf_device_delete(struct fcoe_fcf_device *fcf)
949{
950 struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
951 int timeout = fcf->dev_loss_tmo;
952
953 if (fcf->state != FCOE_FCF_STATE_CONNECTED)
954 return;
955
956 fcf->state = FCOE_FCF_STATE_DISCONNECTED;
957
958 /*
959 * FCF will only be re-connected by the LLD calling
960 * fcoe_fcf_device_add, and it should be setting up
961 * priv then.
962 */
963 fcf->priv = NULL;
964
965 fcoe_ctlr_device_queue_devloss_work(ctlr, &fcf->dev_loss_work,
966 timeout * HZ);
967}
968EXPORT_SYMBOL_GPL(fcoe_fcf_device_delete);
969
970/**
971 * fcoe_fcf_device_add() - Add a FCoE sysfs fcoe_fcf_device to the system
972 * @ctlr: The fcoe_ctlr_device that will be the fcoe_fcf_device parent
973 * @new_fcf: A temporary FCF used for lookups on the current list of fcfs
974 *
975 * Expects to be called with the ctlr->lock held
976 */
977struct fcoe_fcf_device *fcoe_fcf_device_add(struct fcoe_ctlr_device *ctlr,
978 struct fcoe_fcf_device *new_fcf)
979{
980 struct fcoe_fcf_device *fcf;
981 int error = 0;
982
983 list_for_each_entry(fcf, &ctlr->fcfs, peers) {
984 if (fcoe_fcf_device_match(new_fcf, fcf)) {
985 if (fcf->state == FCOE_FCF_STATE_CONNECTED)
986 return fcf;
987
988 fcf->state = FCOE_FCF_STATE_CONNECTED;
989
990 if (!cancel_delayed_work(&fcf->dev_loss_work))
991 fcoe_ctlr_device_flush_devloss(ctlr);
992
993 return fcf;
994 }
995 }
996
997 fcf = kzalloc(sizeof(struct fcoe_fcf_device), GFP_ATOMIC);
998 if (unlikely(!fcf))
999 goto out;
1000
1001 INIT_WORK(&fcf->delete_work, fcoe_fcf_device_final_delete);
1002 INIT_DELAYED_WORK(&fcf->dev_loss_work, fip_timeout_deleted_fcf);
1003
1004 fcf->dev.parent = &ctlr->dev;
1005 fcf->dev.bus = &fcoe_bus_type;
1006 fcf->dev.type = &fcoe_fcf_device_type;
1007 fcf->id = atomic_inc_return(&fcf_num) - 1;
1008 fcf->state = FCOE_FCF_STATE_UNKNOWN;
1009
1010 fcf->dev_loss_tmo = ctlr->fcf_dev_loss_tmo;
1011
1012 dev_set_name(&fcf->dev, "fcf_%d", fcf->id);
1013
1014 fcf->fabric_name = new_fcf->fabric_name;
1015 fcf->switch_name = new_fcf->switch_name;
1016 fcf->fc_map = new_fcf->fc_map;
1017 fcf->vfid = new_fcf->vfid;
1018 memcpy(fcf->mac, new_fcf->mac, ETH_ALEN);
1019 fcf->priority = new_fcf->priority;
1020 fcf->fka_period = new_fcf->fka_period;
1021 fcf->selected = new_fcf->selected;
1022
1023 error = device_register(&fcf->dev);
1024 if (error) {
1025 put_device(&fcf->dev);
1026 goto out;
1027 }
1028
1029 fcf->state = FCOE_FCF_STATE_CONNECTED;
1030 list_add_tail(&fcf->peers, &ctlr->fcfs);
1031
1032 return fcf;
1033
1034out:
1035 return NULL;
1036}
1037EXPORT_SYMBOL_GPL(fcoe_fcf_device_add);
1038
1039int __init fcoe_sysfs_setup(void)
1040{
1041 atomic_set(&ctlr_num, 0);
1042 atomic_set(&fcf_num, 0);
1043
1044 return bus_register(&fcoe_bus_type);
1045}
1046
1047void __exit fcoe_sysfs_teardown(void)
1048{
1049 bus_unregister(&fcoe_bus_type);
1050}