To modify Ixia port numbers and IP in pod.yaml
[kvmfornfv.git] / kernel / drivers / scsi / fcoe / fcoe_sysfs.c
1 /*
2  * Copyright(c) 2011 - 2012 Intel Corporation. All rights reserved.
3  *
4  * This program is free software; you can redistribute it and/or modify it
5  * under the terms and conditions of the GNU General Public License,
6  * version 2, as published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope it will be useful, but WITHOUT
9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
11  * more details.
12  *
13  * You should have received a copy of the GNU General Public License along with
14  * this program; if not, write to the Free Software Foundation, Inc.,
15  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
16  *
17  * Maintained at www.Open-FCoE.org
18  */
19
20 #include <linux/module.h>
21 #include <linux/types.h>
22 #include <linux/kernel.h>
23 #include <linux/etherdevice.h>
24 #include <linux/ctype.h>
25
26 #include <scsi/fcoe_sysfs.h>
27 #include <scsi/libfcoe.h>
28
29 /*
30  * OK to include local libfcoe.h for debug_logging, but cannot include
31  * <scsi/libfcoe.h> otherwise non-netdev based fcoe solutions would have
32  * have to include more than fcoe_sysfs.h.
33  */
34 #include "libfcoe.h"
35
36 static atomic_t ctlr_num;
37 static atomic_t fcf_num;
38
39 /*
40  * fcoe_fcf_dev_loss_tmo: the default number of seconds that fcoe sysfs
41  * should insulate the loss of a fcf.
42  */
43 static unsigned int fcoe_fcf_dev_loss_tmo = 1800;  /* seconds */
44
45 module_param_named(fcf_dev_loss_tmo, fcoe_fcf_dev_loss_tmo,
46                    uint, S_IRUGO|S_IWUSR);
47 MODULE_PARM_DESC(fcf_dev_loss_tmo,
48                  "Maximum number of seconds that libfcoe should"
49                  " insulate the loss of a fcf. Once this value is"
50                  " exceeded, the fcf is removed.");
51
52 /*
53  * These are used by the fcoe_*_show_function routines, they
54  * are intentionally placed in the .c file as they're not intended
55  * for use throughout the code.
56  */
57 #define fcoe_ctlr_id(x)                         \
58         ((x)->id)
59 #define fcoe_ctlr_work_q_name(x)                \
60         ((x)->work_q_name)
61 #define fcoe_ctlr_work_q(x)                     \
62         ((x)->work_q)
63 #define fcoe_ctlr_devloss_work_q_name(x)        \
64         ((x)->devloss_work_q_name)
65 #define fcoe_ctlr_devloss_work_q(x)             \
66         ((x)->devloss_work_q)
67 #define fcoe_ctlr_mode(x)                       \
68         ((x)->mode)
69 #define fcoe_ctlr_fcf_dev_loss_tmo(x)           \
70         ((x)->fcf_dev_loss_tmo)
71 #define fcoe_ctlr_link_fail(x)                  \
72         ((x)->lesb.lesb_link_fail)
73 #define fcoe_ctlr_vlink_fail(x)                 \
74         ((x)->lesb.lesb_vlink_fail)
75 #define fcoe_ctlr_miss_fka(x)                   \
76         ((x)->lesb.lesb_miss_fka)
77 #define fcoe_ctlr_symb_err(x)                   \
78         ((x)->lesb.lesb_symb_err)
79 #define fcoe_ctlr_err_block(x)                  \
80         ((x)->lesb.lesb_err_block)
81 #define fcoe_ctlr_fcs_error(x)                  \
82         ((x)->lesb.lesb_fcs_error)
83 #define fcoe_ctlr_enabled(x)                    \
84         ((x)->enabled)
85 #define fcoe_fcf_state(x)                       \
86         ((x)->state)
87 #define fcoe_fcf_fabric_name(x)                 \
88         ((x)->fabric_name)
89 #define fcoe_fcf_switch_name(x)                 \
90         ((x)->switch_name)
91 #define fcoe_fcf_fc_map(x)                      \
92         ((x)->fc_map)
93 #define fcoe_fcf_vfid(x)                        \
94         ((x)->vfid)
95 #define fcoe_fcf_mac(x)                         \
96         ((x)->mac)
97 #define fcoe_fcf_priority(x)                    \
98         ((x)->priority)
99 #define fcoe_fcf_fka_period(x)                  \
100         ((x)->fka_period)
101 #define fcoe_fcf_dev_loss_tmo(x)                \
102         ((x)->dev_loss_tmo)
103 #define fcoe_fcf_selected(x)                    \
104         ((x)->selected)
105 #define fcoe_fcf_vlan_id(x)                     \
106         ((x)->vlan_id)
107
108 /*
109  * dev_loss_tmo attribute
110  */
111 static int fcoe_str_to_dev_loss(const char *buf, unsigned long *val)
112 {
113         int ret;
114
115         ret = kstrtoul(buf, 0, val);
116         if (ret)
117                 return -EINVAL;
118         /*
119          * Check for overflow; dev_loss_tmo is u32
120          */
121         if (*val > UINT_MAX)
122                 return -EINVAL;
123
124         return 0;
125 }
126
127 static int fcoe_fcf_set_dev_loss_tmo(struct fcoe_fcf_device *fcf,
128                                      unsigned long val)
129 {
130         if ((fcf->state == FCOE_FCF_STATE_UNKNOWN) ||
131             (fcf->state == FCOE_FCF_STATE_DISCONNECTED) ||
132             (fcf->state == FCOE_FCF_STATE_DELETED))
133                 return -EBUSY;
134         /*
135          * Check for overflow; dev_loss_tmo is u32
136          */
137         if (val > UINT_MAX)
138                 return -EINVAL;
139
140         fcoe_fcf_dev_loss_tmo(fcf) = val;
141         return 0;
142 }
143
144 #define FCOE_DEVICE_ATTR(_prefix, _name, _mode, _show, _store)  \
145 struct device_attribute device_attr_fcoe_##_prefix##_##_name =  \
146         __ATTR(_name, _mode, _show, _store)
147
148 #define fcoe_ctlr_show_function(field, format_string, sz, cast) \
149 static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
150                                             struct device_attribute *attr, \
151                                             char *buf)                  \
152 {                                                                       \
153         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);               \
154         if (ctlr->f->get_fcoe_ctlr_##field)                             \
155                 ctlr->f->get_fcoe_ctlr_##field(ctlr);                   \
156         return snprintf(buf, sz, format_string,                         \
157                         cast fcoe_ctlr_##field(ctlr));                  \
158 }
159
160 #define fcoe_fcf_show_function(field, format_string, sz, cast)  \
161 static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \
162                                            struct device_attribute *attr, \
163                                            char *buf)                   \
164 {                                                                       \
165         struct fcoe_fcf_device *fcf = dev_to_fcf(dev);                  \
166         struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);  \
167         if (ctlr->f->get_fcoe_fcf_##field)                              \
168                 ctlr->f->get_fcoe_fcf_##field(fcf);                     \
169         return snprintf(buf, sz, format_string,                         \
170                         cast fcoe_fcf_##field(fcf));                    \
171 }
172
173 #define fcoe_ctlr_private_show_function(field, format_string, sz, cast) \
174 static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
175                                             struct device_attribute *attr, \
176                                             char *buf)                  \
177 {                                                                       \
178         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);               \
179         return snprintf(buf, sz, format_string, cast fcoe_ctlr_##field(ctlr)); \
180 }
181
182 #define fcoe_fcf_private_show_function(field, format_string, sz, cast)  \
183 static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \
184                                            struct device_attribute *attr, \
185                                            char *buf)                   \
186 {                                                               \
187         struct fcoe_fcf_device *fcf = dev_to_fcf(dev);                  \
188         return snprintf(buf, sz, format_string, cast fcoe_fcf_##field(fcf)); \
189 }
190
191 #define fcoe_ctlr_private_rd_attr(field, format_string, sz)             \
192         fcoe_ctlr_private_show_function(field, format_string, sz, )     \
193         static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO,                   \
194                                 show_fcoe_ctlr_device_##field, NULL)
195
196 #define fcoe_ctlr_rd_attr(field, format_string, sz)                     \
197         fcoe_ctlr_show_function(field, format_string, sz, )             \
198         static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO,                   \
199                                 show_fcoe_ctlr_device_##field, NULL)
200
201 #define fcoe_fcf_rd_attr(field, format_string, sz)                      \
202         fcoe_fcf_show_function(field, format_string, sz, )              \
203         static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO,                    \
204                                 show_fcoe_fcf_device_##field, NULL)
205
206 #define fcoe_fcf_private_rd_attr(field, format_string, sz)              \
207         fcoe_fcf_private_show_function(field, format_string, sz, )      \
208         static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO,                    \
209                                 show_fcoe_fcf_device_##field, NULL)
210
211 #define fcoe_ctlr_private_rd_attr_cast(field, format_string, sz, cast)  \
212         fcoe_ctlr_private_show_function(field, format_string, sz, (cast)) \
213         static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO,                   \
214                                 show_fcoe_ctlr_device_##field, NULL)
215
216 #define fcoe_fcf_private_rd_attr_cast(field, format_string, sz, cast)   \
217         fcoe_fcf_private_show_function(field, format_string, sz, (cast)) \
218         static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO,                    \
219                                 show_fcoe_fcf_device_##field, NULL)
220
221 #define fcoe_enum_name_search(title, table_type, table)                 \
222 static const char *get_fcoe_##title##_name(enum table_type table_key)   \
223 {                                                                       \
224         if (table_key < 0 || table_key >= ARRAY_SIZE(table))            \
225                 return NULL;                                            \
226         return table[table_key];                                        \
227 }
228
229 static char *fip_conn_type_names[] = {
230         [ FIP_CONN_TYPE_UNKNOWN ] = "Unknown",
231         [ FIP_CONN_TYPE_FABRIC ]  = "Fabric",
232         [ FIP_CONN_TYPE_VN2VN ]   = "VN2VN",
233 };
234 fcoe_enum_name_search(ctlr_mode, fip_conn_type, fip_conn_type_names)
235
236 static enum fip_conn_type fcoe_parse_mode(const char *buf)
237 {
238         int i;
239
240         for (i = 0; i < ARRAY_SIZE(fip_conn_type_names); i++) {
241                 if (strcasecmp(buf, fip_conn_type_names[i]) == 0)
242                         return i;
243         }
244
245         return FIP_CONN_TYPE_UNKNOWN;
246 }
247
248 static char *fcf_state_names[] = {
249         [ FCOE_FCF_STATE_UNKNOWN ]      = "Unknown",
250         [ FCOE_FCF_STATE_DISCONNECTED ] = "Disconnected",
251         [ FCOE_FCF_STATE_CONNECTED ]    = "Connected",
252 };
253 fcoe_enum_name_search(fcf_state, fcf_state, fcf_state_names)
254 #define FCOE_FCF_STATE_MAX_NAMELEN 50
255
256 static ssize_t show_fcf_state(struct device *dev,
257                               struct device_attribute *attr,
258                               char *buf)
259 {
260         struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
261         const char *name;
262         name = get_fcoe_fcf_state_name(fcf->state);
263         if (!name)
264                 return -EINVAL;
265         return snprintf(buf, FCOE_FCF_STATE_MAX_NAMELEN, "%s\n", name);
266 }
267 static FCOE_DEVICE_ATTR(fcf, state, S_IRUGO, show_fcf_state, NULL);
268
269 #define FCOE_MAX_MODENAME_LEN 20
270 static ssize_t show_ctlr_mode(struct device *dev,
271                               struct device_attribute *attr,
272                               char *buf)
273 {
274         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
275         const char *name;
276
277         name = get_fcoe_ctlr_mode_name(ctlr->mode);
278         if (!name)
279                 return -EINVAL;
280         return snprintf(buf, FCOE_MAX_MODENAME_LEN,
281                         "%s\n", name);
282 }
283
284 static ssize_t store_ctlr_mode(struct device *dev,
285                                struct device_attribute *attr,
286                                const char *buf, size_t count)
287 {
288         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
289         char mode[FCOE_MAX_MODENAME_LEN + 1];
290
291         if (count > FCOE_MAX_MODENAME_LEN)
292                 return -EINVAL;
293
294         strncpy(mode, buf, count);
295
296         if (mode[count - 1] == '\n')
297                 mode[count - 1] = '\0';
298         else
299                 mode[count] = '\0';
300
301         switch (ctlr->enabled) {
302         case FCOE_CTLR_ENABLED:
303                 LIBFCOE_SYSFS_DBG(ctlr, "Cannot change mode when enabled.\n");
304                 return -EBUSY;
305         case FCOE_CTLR_DISABLED:
306                 if (!ctlr->f->set_fcoe_ctlr_mode) {
307                         LIBFCOE_SYSFS_DBG(ctlr,
308                                           "Mode change not supported by LLD.\n");
309                         return -ENOTSUPP;
310                 }
311
312                 ctlr->mode = fcoe_parse_mode(mode);
313                 if (ctlr->mode == FIP_CONN_TYPE_UNKNOWN) {
314                         LIBFCOE_SYSFS_DBG(ctlr, "Unknown mode %s provided.\n",
315                                           buf);
316                         return -EINVAL;
317                 }
318
319                 ctlr->f->set_fcoe_ctlr_mode(ctlr);
320                 LIBFCOE_SYSFS_DBG(ctlr, "Mode changed to %s.\n", buf);
321
322                 return count;
323         case FCOE_CTLR_UNUSED:
324         default:
325                 LIBFCOE_SYSFS_DBG(ctlr, "Mode change not supported.\n");
326                 return -ENOTSUPP;
327         };
328 }
329
330 static FCOE_DEVICE_ATTR(ctlr, mode, S_IRUGO | S_IWUSR,
331                         show_ctlr_mode, store_ctlr_mode);
332
333 static ssize_t store_ctlr_enabled(struct device *dev,
334                                   struct device_attribute *attr,
335                                   const char *buf, size_t count)
336 {
337         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
338         int rc;
339
340         switch (ctlr->enabled) {
341         case FCOE_CTLR_ENABLED:
342                 if (*buf == '1')
343                         return count;
344                 ctlr->enabled = FCOE_CTLR_DISABLED;
345                 break;
346         case FCOE_CTLR_DISABLED:
347                 if (*buf == '0')
348                         return count;
349                 ctlr->enabled = FCOE_CTLR_ENABLED;
350                 break;
351         case FCOE_CTLR_UNUSED:
352                 return -ENOTSUPP;
353         };
354
355         rc = ctlr->f->set_fcoe_ctlr_enabled(ctlr);
356         if (rc)
357                 return rc;
358
359         return count;
360 }
361
362 static char *ctlr_enabled_state_names[] = {
363         [ FCOE_CTLR_ENABLED ]  = "1",
364         [ FCOE_CTLR_DISABLED ] = "0",
365 };
366 fcoe_enum_name_search(ctlr_enabled_state, ctlr_enabled_state,
367                       ctlr_enabled_state_names)
368 #define FCOE_CTLR_ENABLED_MAX_NAMELEN 50
369
370 static ssize_t show_ctlr_enabled_state(struct device *dev,
371                                        struct device_attribute *attr,
372                                        char *buf)
373 {
374         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
375         const char *name;
376
377         name = get_fcoe_ctlr_enabled_state_name(ctlr->enabled);
378         if (!name)
379                 return -EINVAL;
380         return snprintf(buf, FCOE_CTLR_ENABLED_MAX_NAMELEN,
381                         "%s\n", name);
382 }
383
384 static FCOE_DEVICE_ATTR(ctlr, enabled, S_IRUGO | S_IWUSR,
385                         show_ctlr_enabled_state,
386                         store_ctlr_enabled);
387
388 static ssize_t
389 store_private_fcoe_ctlr_fcf_dev_loss_tmo(struct device *dev,
390                                          struct device_attribute *attr,
391                                          const char *buf, size_t count)
392 {
393         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
394         struct fcoe_fcf_device *fcf;
395         unsigned long val;
396         int rc;
397
398         rc = fcoe_str_to_dev_loss(buf, &val);
399         if (rc)
400                 return rc;
401
402         fcoe_ctlr_fcf_dev_loss_tmo(ctlr) = val;
403         mutex_lock(&ctlr->lock);
404         list_for_each_entry(fcf, &ctlr->fcfs, peers)
405                 fcoe_fcf_set_dev_loss_tmo(fcf, val);
406         mutex_unlock(&ctlr->lock);
407         return count;
408 }
409 fcoe_ctlr_private_show_function(fcf_dev_loss_tmo, "%d\n", 20, );
410 static FCOE_DEVICE_ATTR(ctlr, fcf_dev_loss_tmo, S_IRUGO | S_IWUSR,
411                         show_fcoe_ctlr_device_fcf_dev_loss_tmo,
412                         store_private_fcoe_ctlr_fcf_dev_loss_tmo);
413
414 /* Link Error Status Block (LESB) */
415 fcoe_ctlr_rd_attr(link_fail, "%u\n", 20);
416 fcoe_ctlr_rd_attr(vlink_fail, "%u\n", 20);
417 fcoe_ctlr_rd_attr(miss_fka, "%u\n", 20);
418 fcoe_ctlr_rd_attr(symb_err, "%u\n", 20);
419 fcoe_ctlr_rd_attr(err_block, "%u\n", 20);
420 fcoe_ctlr_rd_attr(fcs_error, "%u\n", 20);
421
422 fcoe_fcf_private_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
423 fcoe_fcf_private_rd_attr_cast(switch_name, "0x%llx\n", 20, unsigned long long);
424 fcoe_fcf_private_rd_attr(priority, "%u\n", 20);
425 fcoe_fcf_private_rd_attr(fc_map, "0x%x\n", 20);
426 fcoe_fcf_private_rd_attr(vfid, "%u\n", 20);
427 fcoe_fcf_private_rd_attr(mac, "%pM\n", 20);
428 fcoe_fcf_private_rd_attr(fka_period, "%u\n", 20);
429 fcoe_fcf_rd_attr(selected, "%u\n", 20);
430 fcoe_fcf_rd_attr(vlan_id, "%u\n", 20);
431
432 fcoe_fcf_private_show_function(dev_loss_tmo, "%d\n", 20, )
433 static ssize_t
434 store_fcoe_fcf_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
435                             const char *buf, size_t count)
436 {
437         struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
438         unsigned long val;
439         int rc;
440
441         rc = fcoe_str_to_dev_loss(buf, &val);
442         if (rc)
443                 return rc;
444
445         rc = fcoe_fcf_set_dev_loss_tmo(fcf, val);
446         if (rc)
447                 return rc;
448         return count;
449 }
450 static FCOE_DEVICE_ATTR(fcf, dev_loss_tmo, S_IRUGO | S_IWUSR,
451                         show_fcoe_fcf_device_dev_loss_tmo,
452                         store_fcoe_fcf_dev_loss_tmo);
453
454 static struct attribute *fcoe_ctlr_lesb_attrs[] = {
455         &device_attr_fcoe_ctlr_link_fail.attr,
456         &device_attr_fcoe_ctlr_vlink_fail.attr,
457         &device_attr_fcoe_ctlr_miss_fka.attr,
458         &device_attr_fcoe_ctlr_symb_err.attr,
459         &device_attr_fcoe_ctlr_err_block.attr,
460         &device_attr_fcoe_ctlr_fcs_error.attr,
461         NULL,
462 };
463
464 static struct attribute_group fcoe_ctlr_lesb_attr_group = {
465         .name = "lesb",
466         .attrs = fcoe_ctlr_lesb_attrs,
467 };
468
469 static struct attribute *fcoe_ctlr_attrs[] = {
470         &device_attr_fcoe_ctlr_fcf_dev_loss_tmo.attr,
471         &device_attr_fcoe_ctlr_enabled.attr,
472         &device_attr_fcoe_ctlr_mode.attr,
473         NULL,
474 };
475
476 static struct attribute_group fcoe_ctlr_attr_group = {
477         .attrs = fcoe_ctlr_attrs,
478 };
479
480 static const struct attribute_group *fcoe_ctlr_attr_groups[] = {
481         &fcoe_ctlr_attr_group,
482         &fcoe_ctlr_lesb_attr_group,
483         NULL,
484 };
485
486 static struct attribute *fcoe_fcf_attrs[] = {
487         &device_attr_fcoe_fcf_fabric_name.attr,
488         &device_attr_fcoe_fcf_switch_name.attr,
489         &device_attr_fcoe_fcf_dev_loss_tmo.attr,
490         &device_attr_fcoe_fcf_fc_map.attr,
491         &device_attr_fcoe_fcf_vfid.attr,
492         &device_attr_fcoe_fcf_mac.attr,
493         &device_attr_fcoe_fcf_priority.attr,
494         &device_attr_fcoe_fcf_fka_period.attr,
495         &device_attr_fcoe_fcf_state.attr,
496         &device_attr_fcoe_fcf_selected.attr,
497         &device_attr_fcoe_fcf_vlan_id.attr,
498         NULL
499 };
500
501 static struct attribute_group fcoe_fcf_attr_group = {
502         .attrs = fcoe_fcf_attrs,
503 };
504
505 static const struct attribute_group *fcoe_fcf_attr_groups[] = {
506         &fcoe_fcf_attr_group,
507         NULL,
508 };
509
510 static struct bus_type fcoe_bus_type;
511
512 static int fcoe_bus_match(struct device *dev,
513                           struct device_driver *drv)
514 {
515         if (dev->bus == &fcoe_bus_type)
516                 return 1;
517         return 0;
518 }
519
520 /**
521  * fcoe_ctlr_device_release() - Release the FIP ctlr memory
522  * @dev: Pointer to the FIP ctlr's embedded device
523  *
524  * Called when the last FIP ctlr reference is released.
525  */
526 static void fcoe_ctlr_device_release(struct device *dev)
527 {
528         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
529         kfree(ctlr);
530 }
531
532 /**
533  * fcoe_fcf_device_release() - Release the FIP fcf memory
534  * @dev: Pointer to the fcf's embedded device
535  *
536  * Called when the last FIP fcf reference is released.
537  */
538 static void fcoe_fcf_device_release(struct device *dev)
539 {
540         struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
541         kfree(fcf);
542 }
543
544 static struct device_type fcoe_ctlr_device_type = {
545         .name = "fcoe_ctlr",
546         .groups = fcoe_ctlr_attr_groups,
547         .release = fcoe_ctlr_device_release,
548 };
549
550 static struct device_type fcoe_fcf_device_type = {
551         .name = "fcoe_fcf",
552         .groups = fcoe_fcf_attr_groups,
553         .release = fcoe_fcf_device_release,
554 };
555
556 static BUS_ATTR(ctlr_create, S_IWUSR, NULL, fcoe_ctlr_create_store);
557 static BUS_ATTR(ctlr_destroy, S_IWUSR, NULL, fcoe_ctlr_destroy_store);
558
559 static struct attribute *fcoe_bus_attrs[] = {
560         &bus_attr_ctlr_create.attr,
561         &bus_attr_ctlr_destroy.attr,
562         NULL,
563 };
564 ATTRIBUTE_GROUPS(fcoe_bus);
565
566 static struct bus_type fcoe_bus_type = {
567         .name = "fcoe",
568         .match = &fcoe_bus_match,
569         .bus_groups = fcoe_bus_groups,
570 };
571
572 /**
573  * fcoe_ctlr_device_flush_work() - Flush a FIP ctlr's workqueue
574  * @ctlr: Pointer to the FIP ctlr whose workqueue is to be flushed
575  */
576 static void fcoe_ctlr_device_flush_work(struct fcoe_ctlr_device *ctlr)
577 {
578         if (!fcoe_ctlr_work_q(ctlr)) {
579                 printk(KERN_ERR
580                        "ERROR: FIP Ctlr '%d' attempted to flush work, "
581                        "when no workqueue created.\n", ctlr->id);
582                 dump_stack();
583                 return;
584         }
585
586         flush_workqueue(fcoe_ctlr_work_q(ctlr));
587 }
588
589 /**
590  * fcoe_ctlr_device_queue_work() - Schedule work for a FIP ctlr's workqueue
591  * @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue
592  * @work:   Work to queue for execution
593  *
594  * Return value:
595  *      1 on success / 0 already queued / < 0 for error
596  */
597 static int fcoe_ctlr_device_queue_work(struct fcoe_ctlr_device *ctlr,
598                                        struct work_struct *work)
599 {
600         if (unlikely(!fcoe_ctlr_work_q(ctlr))) {
601                 printk(KERN_ERR
602                        "ERROR: FIP Ctlr '%d' attempted to queue work, "
603                        "when no workqueue created.\n", ctlr->id);
604                 dump_stack();
605
606                 return -EINVAL;
607         }
608
609         return queue_work(fcoe_ctlr_work_q(ctlr), work);
610 }
611
612 /**
613  * fcoe_ctlr_device_flush_devloss() - Flush a FIP ctlr's devloss workqueue
614  * @ctlr: Pointer to FIP ctlr whose workqueue is to be flushed
615  */
616 static void fcoe_ctlr_device_flush_devloss(struct fcoe_ctlr_device *ctlr)
617 {
618         if (!fcoe_ctlr_devloss_work_q(ctlr)) {
619                 printk(KERN_ERR
620                        "ERROR: FIP Ctlr '%d' attempted to flush work, "
621                        "when no workqueue created.\n", ctlr->id);
622                 dump_stack();
623                 return;
624         }
625
626         flush_workqueue(fcoe_ctlr_devloss_work_q(ctlr));
627 }
628
629 /**
630  * fcoe_ctlr_device_queue_devloss_work() - Schedule work for a FIP ctlr's devloss workqueue
631  * @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue
632  * @work:   Work to queue for execution
633  * @delay:  jiffies to delay the work queuing
634  *
635  * Return value:
636  *      1 on success / 0 already queued / < 0 for error
637  */
638 static int fcoe_ctlr_device_queue_devloss_work(struct fcoe_ctlr_device *ctlr,
639                                                struct delayed_work *work,
640                                                unsigned long delay)
641 {
642         if (unlikely(!fcoe_ctlr_devloss_work_q(ctlr))) {
643                 printk(KERN_ERR
644                        "ERROR: FIP Ctlr '%d' attempted to queue work, "
645                        "when no workqueue created.\n", ctlr->id);
646                 dump_stack();
647
648                 return -EINVAL;
649         }
650
651         return queue_delayed_work(fcoe_ctlr_devloss_work_q(ctlr), work, delay);
652 }
653
654 static int fcoe_fcf_device_match(struct fcoe_fcf_device *new,
655                                  struct fcoe_fcf_device *old)
656 {
657         if (new->switch_name == old->switch_name &&
658             new->fabric_name == old->fabric_name &&
659             new->fc_map == old->fc_map &&
660             ether_addr_equal(new->mac, old->mac))
661                 return 1;
662         return 0;
663 }
664
665 /**
666  * fcoe_ctlr_device_add() - Add a FIP ctlr to sysfs
667  * @parent:    The parent device to which the fcoe_ctlr instance
668  *             should be attached
669  * @f:         The LLD's FCoE sysfs function template pointer
670  * @priv_size: Size to be allocated with the fcoe_ctlr_device for the LLD
671  *
672  * This routine allocates a FIP ctlr object with some additional memory
673  * for the LLD. The FIP ctlr is initialized, added to sysfs and then
674  * attributes are added to it.
675  */
676 struct fcoe_ctlr_device *fcoe_ctlr_device_add(struct device *parent,
677                                     struct fcoe_sysfs_function_template *f,
678                                     int priv_size)
679 {
680         struct fcoe_ctlr_device *ctlr;
681         int error = 0;
682
683         ctlr = kzalloc(sizeof(struct fcoe_ctlr_device) + priv_size,
684                        GFP_KERNEL);
685         if (!ctlr)
686                 goto out;
687
688         ctlr->id = atomic_inc_return(&ctlr_num) - 1;
689         ctlr->f = f;
690         ctlr->mode = FIP_CONN_TYPE_FABRIC;
691         INIT_LIST_HEAD(&ctlr->fcfs);
692         mutex_init(&ctlr->lock);
693         ctlr->dev.parent = parent;
694         ctlr->dev.bus = &fcoe_bus_type;
695         ctlr->dev.type = &fcoe_ctlr_device_type;
696
697         ctlr->fcf_dev_loss_tmo = fcoe_fcf_dev_loss_tmo;
698
699         snprintf(ctlr->work_q_name, sizeof(ctlr->work_q_name),
700                  "ctlr_wq_%d", ctlr->id);
701         ctlr->work_q = create_singlethread_workqueue(
702                 ctlr->work_q_name);
703         if (!ctlr->work_q)
704                 goto out_del;
705
706         snprintf(ctlr->devloss_work_q_name,
707                  sizeof(ctlr->devloss_work_q_name),
708                  "ctlr_dl_wq_%d", ctlr->id);
709         ctlr->devloss_work_q = create_singlethread_workqueue(
710                 ctlr->devloss_work_q_name);
711         if (!ctlr->devloss_work_q)
712                 goto out_del_q;
713
714         dev_set_name(&ctlr->dev, "ctlr_%d", ctlr->id);
715         error = device_register(&ctlr->dev);
716         if (error)
717                 goto out_del_q2;
718
719         return ctlr;
720
721 out_del_q2:
722         destroy_workqueue(ctlr->devloss_work_q);
723         ctlr->devloss_work_q = NULL;
724 out_del_q:
725         destroy_workqueue(ctlr->work_q);
726         ctlr->work_q = NULL;
727 out_del:
728         kfree(ctlr);
729 out:
730         return NULL;
731 }
732 EXPORT_SYMBOL_GPL(fcoe_ctlr_device_add);
733
734 /**
735  * fcoe_ctlr_device_delete() - Delete a FIP ctlr and its subtree from sysfs
736  * @ctlr: A pointer to the ctlr to be deleted
737  *
738  * Deletes a FIP ctlr and any fcfs attached
739  * to it. Deleting fcfs will cause their childen
740  * to be deleted as well.
741  *
742  * The ctlr is detached from sysfs and it's resources
743  * are freed (work q), but the memory is not freed
744  * until its last reference is released.
745  *
746  * This routine expects no locks to be held before
747  * calling.
748  *
749  * TODO: Currently there are no callbacks to clean up LLD data
750  * for a fcoe_fcf_device. LLDs must keep this in mind as they need
751  * to clean up each of their LLD data for all fcoe_fcf_device before
752  * calling fcoe_ctlr_device_delete.
753  */
754 void fcoe_ctlr_device_delete(struct fcoe_ctlr_device *ctlr)
755 {
756         struct fcoe_fcf_device *fcf, *next;
757         /* Remove any attached fcfs */
758         mutex_lock(&ctlr->lock);
759         list_for_each_entry_safe(fcf, next,
760                                  &ctlr->fcfs, peers) {
761                 list_del(&fcf->peers);
762                 fcf->state = FCOE_FCF_STATE_DELETED;
763                 fcoe_ctlr_device_queue_work(ctlr, &fcf->delete_work);
764         }
765         mutex_unlock(&ctlr->lock);
766
767         fcoe_ctlr_device_flush_work(ctlr);
768
769         destroy_workqueue(ctlr->devloss_work_q);
770         ctlr->devloss_work_q = NULL;
771         destroy_workqueue(ctlr->work_q);
772         ctlr->work_q = NULL;
773
774         device_unregister(&ctlr->dev);
775 }
776 EXPORT_SYMBOL_GPL(fcoe_ctlr_device_delete);
777
778 /**
779  * fcoe_fcf_device_final_delete() - Final delete routine
780  * @work: The FIP fcf's embedded work struct
781  *
782  * It is expected that the fcf has been removed from
783  * the FIP ctlr's list before calling this routine.
784  */
785 static void fcoe_fcf_device_final_delete(struct work_struct *work)
786 {
787         struct fcoe_fcf_device *fcf =
788                 container_of(work, struct fcoe_fcf_device, delete_work);
789         struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
790
791         /*
792          * Cancel any outstanding timers. These should really exist
793          * only when rmmod'ing the LLDD and we're asking for
794          * immediate termination of the rports
795          */
796         if (!cancel_delayed_work(&fcf->dev_loss_work))
797                 fcoe_ctlr_device_flush_devloss(ctlr);
798
799         device_unregister(&fcf->dev);
800 }
801
802 /**
803  * fip_timeout_deleted_fcf() - Delete a fcf when the devloss timer fires
804  * @work: The FIP fcf's embedded work struct
805  *
806  * Removes the fcf from the FIP ctlr's list of fcfs and
807  * queues the final deletion.
808  */
809 static void fip_timeout_deleted_fcf(struct work_struct *work)
810 {
811         struct fcoe_fcf_device *fcf =
812                 container_of(work, struct fcoe_fcf_device, dev_loss_work.work);
813         struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
814
815         mutex_lock(&ctlr->lock);
816
817         /*
818          * If the fcf is deleted or reconnected before the timer
819          * fires the devloss queue will be flushed, but the state will
820          * either be CONNECTED or DELETED. If that is the case we
821          * cancel deleting the fcf.
822          */
823         if (fcf->state != FCOE_FCF_STATE_DISCONNECTED)
824                 goto out;
825
826         dev_printk(KERN_ERR, &fcf->dev,
827                    "FIP fcf connection time out: removing fcf\n");
828
829         list_del(&fcf->peers);
830         fcf->state = FCOE_FCF_STATE_DELETED;
831         fcoe_ctlr_device_queue_work(ctlr, &fcf->delete_work);
832
833 out:
834         mutex_unlock(&ctlr->lock);
835 }
836
837 /**
838  * fcoe_fcf_device_delete() - Delete a FIP fcf
839  * @fcf: Pointer to the fcf which is to be deleted
840  *
841  * Queues the FIP fcf on the devloss workqueue
842  *
843  * Expects the ctlr_attrs mutex to be held for fcf
844  * state change.
845  */
846 void fcoe_fcf_device_delete(struct fcoe_fcf_device *fcf)
847 {
848         struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
849         int timeout = fcf->dev_loss_tmo;
850
851         if (fcf->state != FCOE_FCF_STATE_CONNECTED)
852                 return;
853
854         fcf->state = FCOE_FCF_STATE_DISCONNECTED;
855
856         /*
857          * FCF will only be re-connected by the LLD calling
858          * fcoe_fcf_device_add, and it should be setting up
859          * priv then.
860          */
861         fcf->priv = NULL;
862
863         fcoe_ctlr_device_queue_devloss_work(ctlr, &fcf->dev_loss_work,
864                                            timeout * HZ);
865 }
866 EXPORT_SYMBOL_GPL(fcoe_fcf_device_delete);
867
868 /**
869  * fcoe_fcf_device_add() - Add a FCoE sysfs fcoe_fcf_device to the system
870  * @ctlr:    The fcoe_ctlr_device that will be the fcoe_fcf_device parent
871  * @new_fcf: A temporary FCF used for lookups on the current list of fcfs
872  *
873  * Expects to be called with the ctlr->lock held
874  */
875 struct fcoe_fcf_device *fcoe_fcf_device_add(struct fcoe_ctlr_device *ctlr,
876                                             struct fcoe_fcf_device *new_fcf)
877 {
878         struct fcoe_fcf_device *fcf;
879         int error = 0;
880
881         list_for_each_entry(fcf, &ctlr->fcfs, peers) {
882                 if (fcoe_fcf_device_match(new_fcf, fcf)) {
883                         if (fcf->state == FCOE_FCF_STATE_CONNECTED)
884                                 return fcf;
885
886                         fcf->state = FCOE_FCF_STATE_CONNECTED;
887
888                         if (!cancel_delayed_work(&fcf->dev_loss_work))
889                                 fcoe_ctlr_device_flush_devloss(ctlr);
890
891                         return fcf;
892                 }
893         }
894
895         fcf = kzalloc(sizeof(struct fcoe_fcf_device), GFP_ATOMIC);
896         if (unlikely(!fcf))
897                 goto out;
898
899         INIT_WORK(&fcf->delete_work, fcoe_fcf_device_final_delete);
900         INIT_DELAYED_WORK(&fcf->dev_loss_work, fip_timeout_deleted_fcf);
901
902         fcf->dev.parent = &ctlr->dev;
903         fcf->dev.bus = &fcoe_bus_type;
904         fcf->dev.type = &fcoe_fcf_device_type;
905         fcf->id = atomic_inc_return(&fcf_num) - 1;
906         fcf->state = FCOE_FCF_STATE_UNKNOWN;
907
908         fcf->dev_loss_tmo = ctlr->fcf_dev_loss_tmo;
909
910         dev_set_name(&fcf->dev, "fcf_%d", fcf->id);
911
912         fcf->fabric_name = new_fcf->fabric_name;
913         fcf->switch_name = new_fcf->switch_name;
914         fcf->fc_map = new_fcf->fc_map;
915         fcf->vfid = new_fcf->vfid;
916         memcpy(fcf->mac, new_fcf->mac, ETH_ALEN);
917         fcf->priority = new_fcf->priority;
918         fcf->fka_period = new_fcf->fka_period;
919         fcf->selected = new_fcf->selected;
920
921         error = device_register(&fcf->dev);
922         if (error)
923                 goto out_del;
924
925         fcf->state = FCOE_FCF_STATE_CONNECTED;
926         list_add_tail(&fcf->peers, &ctlr->fcfs);
927
928         return fcf;
929
930 out_del:
931         kfree(fcf);
932 out:
933         return NULL;
934 }
935 EXPORT_SYMBOL_GPL(fcoe_fcf_device_add);
936
937 int __init fcoe_sysfs_setup(void)
938 {
939         int error;
940
941         atomic_set(&ctlr_num, 0);
942         atomic_set(&fcf_num, 0);
943
944         error = bus_register(&fcoe_bus_type);
945         if (error)
946                 return error;
947
948         return 0;
949 }
950
951 void __exit fcoe_sysfs_teardown(void)
952 {
953         bus_unregister(&fcoe_bus_type);
954 }