?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[NET_SCHED]: Fix endless loops caused by inaccurate qlen counters (part 1)
[hh.org.git] / drivers / s390 / scsi / zfcp_aux.c
blob5d39b2df0cc43fdcb49417641bdbb606f3e18ff0
1 /*
2 * This file is part of the zfcp device driver for
3 * FCP adapters for IBM System z9 and zSeries.
4 *
5 * (C) Copyright IBM Corp. 2002, 2006
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22 /*
23 * Driver authors:
24 * Martin Peschke (originator of the driver)
25 * Raimund Schroeder
26 * Aron Zeh
27 * Wolfgang Taphorn
28 * Stefan Bader
29 * Heiko Carstens (kernel 2.6 port of the driver)
30 * Andreas Herrmann
31 * Maxim Shchetynin
32 * Volker Sameske
33 * Ralph Wuerthner
34 */
35
36 #include "zfcp_ext.h"
37
38 /* accumulated log level (module parameter) */
39 static u32 loglevel = ZFCP_LOG_LEVEL_DEFAULTS;
40 static char *device;
41 /*********************** FUNCTION PROTOTYPES *********************************/
42
43 /* written against the module interface */
44 static int __init zfcp_module_init(void);
45
46 /* FCP related */
47 static void zfcp_ns_gid_pn_handler(unsigned long);
48
49 /* miscellaneous */
50 static inline int zfcp_sg_list_alloc(struct zfcp_sg_list *, size_t);
51 static inline void zfcp_sg_list_free(struct zfcp_sg_list *);
52 static inline int zfcp_sg_list_copy_from_user(struct zfcp_sg_list *,
53 void __user *, size_t);
54 static inline int zfcp_sg_list_copy_to_user(void __user *,
55 struct zfcp_sg_list *, size_t);
56
57 static long zfcp_cfdc_dev_ioctl(struct file *, unsigned int, unsigned long);
58
59 #define ZFCP_CFDC_IOC_MAGIC 0xDD
60 #define ZFCP_CFDC_IOC \
61 _IOWR(ZFCP_CFDC_IOC_MAGIC, 0, struct zfcp_cfdc_sense_data)
62
63
64 static struct file_operations zfcp_cfdc_fops = {
65 .unlocked_ioctl = zfcp_cfdc_dev_ioctl,
66 #ifdef CONFIG_COMPAT
67 .compat_ioctl = zfcp_cfdc_dev_ioctl
68 #endif
69 };
70
71 static struct miscdevice zfcp_cfdc_misc = {
72 .minor = ZFCP_CFDC_DEV_MINOR,
73 .name = ZFCP_CFDC_DEV_NAME,
74 .fops = &zfcp_cfdc_fops
75 };
76
77 /*********************** KERNEL/MODULE PARAMETERS ***************************/
78
79 /* declare driver module init/cleanup functions */
80 module_init(zfcp_module_init);
81
82 MODULE_AUTHOR("IBM Deutschland Entwicklung GmbH - linux390@de.ibm.com");
83 MODULE_DESCRIPTION
84 ("FCP (SCSI over Fibre Channel) HBA driver for IBM System z9 and zSeries");
85 MODULE_LICENSE("GPL");
86
87 module_param(device, charp, 0400);
88 MODULE_PARM_DESC(device, "specify initial device");
89
90 module_param(loglevel, uint, 0400);
91 MODULE_PARM_DESC(loglevel,
92 "log levels, 8 nibbles: "
93 "FC ERP QDIO CIO Config FSF SCSI Other, "
94 "levels: 0=none 1=normal 2=devel 3=trace");
95
96 /****************************************************************/
97 /************** Functions without logging ***********************/
98 /****************************************************************/
99
100 void
101 _zfcp_hex_dump(char *addr, int count)
102 {
103 int i;
104 for (i = 0; i < count; i++) {
105 printk("%02x", addr[i]);
106 if ((i % 4) == 3)
107 printk(" ");
108 if ((i % 32) == 31)
109 printk("\n");
110 }
111 if (((i-1) % 32) != 31)
112 printk("\n");
113 }
114
115
116 /****************************************************************/
117 /****** Functions to handle the request ID hash table ********/
118 /****************************************************************/
119
120 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF
121
122 static int zfcp_reqlist_init(struct zfcp_adapter *adapter)
123 {
124 int i;
125
126 adapter->req_list = kcalloc(REQUEST_LIST_SIZE, sizeof(struct list_head),
127 GFP_KERNEL);
128
129 if (!adapter->req_list)
130 return -ENOMEM;
131
132 for (i=0; i<REQUEST_LIST_SIZE; i++)
133 INIT_LIST_HEAD(&adapter->req_list[i]);
134
135 return 0;
136 }
137
138 static void zfcp_reqlist_free(struct zfcp_adapter *adapter)
139 {
140 struct zfcp_fsf_req *request, *tmp;
141 unsigned int i;
142
143 for (i=0; i<REQUEST_LIST_SIZE; i++) {
144 if (list_empty(&adapter->req_list[i]))
145 continue;
146
147 list_for_each_entry_safe(request, tmp,
148 &adapter->req_list[i], list)
149 list_del(&request->list);
150 }
151
152 kfree(adapter->req_list);
153 }
154
155 void zfcp_reqlist_add(struct zfcp_adapter *adapter,
156 struct zfcp_fsf_req *fsf_req)
157 {
158 unsigned int i;
159
160 i = fsf_req->req_id % REQUEST_LIST_SIZE;
161 list_add_tail(&fsf_req->list, &adapter->req_list[i]);
162 }
163
164 void zfcp_reqlist_remove(struct zfcp_adapter *adapter, unsigned long req_id)
165 {
166 struct zfcp_fsf_req *request, *tmp;
167 unsigned int i, counter;
168 u64 dbg_tmp[2];
169
170 i = req_id % REQUEST_LIST_SIZE;
171 BUG_ON(list_empty(&adapter->req_list[i]));
172
173 counter = 0;
174 list_for_each_entry_safe(request, tmp, &adapter->req_list[i], list) {
175 if (request->req_id == req_id) {
176 dbg_tmp[0] = (u64) atomic_read(&adapter->reqs_active);
177 dbg_tmp[1] = (u64) counter;
178 debug_event(adapter->erp_dbf, 4, (void *) dbg_tmp, 16);
179 list_del(&request->list);
180 break;
181 }
182 counter++;
183 }
184 }
185
186 struct zfcp_fsf_req *zfcp_reqlist_ismember(struct zfcp_adapter *adapter,
187 unsigned long req_id)
188 {
189 struct zfcp_fsf_req *request, *tmp;
190 unsigned int i;
191
192 /* 0 is reserved as an invalid req_id */
193 if (req_id == 0)
194 return NULL;
195
196 i = req_id % REQUEST_LIST_SIZE;
197
198 list_for_each_entry_safe(request, tmp, &adapter->req_list[i], list)
199 if (request->req_id == req_id)
200 return request;
201
202 return NULL;
203 }
204
205 int zfcp_reqlist_isempty(struct zfcp_adapter *adapter)
206 {
207 unsigned int i;
208
209 for (i=0; i<REQUEST_LIST_SIZE; i++)
210 if (!list_empty(&adapter->req_list[i]))
211 return 0;
212
213 return 1;
214 }
215
216 #undef ZFCP_LOG_AREA
217
218 /****************************************************************/
219 /************** Uncategorised Functions *************************/
220 /****************************************************************/
221
222 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_OTHER
223
224 /**
225 * zfcp_device_setup - setup function
226 * @str: pointer to parameter string
227 *
228 * Parse "device=..." parameter string.
229 */
230 static int __init
231 zfcp_device_setup(char *devstr)
232 {
233 char *tmp, *str;
234 size_t len;
235
236 if (!devstr)
237 return 0;
238
239 len = strlen(devstr) + 1;
240 str = (char *) kmalloc(len, GFP_KERNEL);
241 if (!str)
242 goto err_out;
243 memcpy(str, devstr, len);
244
245 tmp = strchr(str, ',');
246 if (!tmp)
247 goto err_out;
248 *tmp++ = '\0';
249 strncpy(zfcp_data.init_busid, str, BUS_ID_SIZE);
250 zfcp_data.init_busid[BUS_ID_SIZE-1] = '\0';
251
252 zfcp_data.init_wwpn = simple_strtoull(tmp, &tmp, 0);
253 if (*tmp++ != ',')
254 goto err_out;
255 if (*tmp == '\0')
256 goto err_out;
257
258 zfcp_data.init_fcp_lun = simple_strtoull(tmp, &tmp, 0);
259 if (*tmp != '\0')
260 goto err_out;
261 kfree(str);
262 return 1;
263
264 err_out:
265 ZFCP_LOG_NORMAL("Parse error for device parameter string %s\n", str);
266 kfree(str);
267 return 0;
268 }
269
270 static void __init
271 zfcp_init_device_configure(void)
272 {
273 struct zfcp_adapter *adapter;
274 struct zfcp_port *port;
275 struct zfcp_unit *unit;
276
277 down(&zfcp_data.config_sema);
278 read_lock_irq(&zfcp_data.config_lock);
279 adapter = zfcp_get_adapter_by_busid(zfcp_data.init_busid);
280 if (adapter)
281 zfcp_adapter_get(adapter);
282 read_unlock_irq(&zfcp_data.config_lock);
283
284 if (adapter == NULL)
285 goto out_adapter;
286 port = zfcp_port_enqueue(adapter, zfcp_data.init_wwpn, 0, 0);
287 if (!port)
288 goto out_port;
289 unit = zfcp_unit_enqueue(port, zfcp_data.init_fcp_lun);
290 if (!unit)
291 goto out_unit;
292 up(&zfcp_data.config_sema);
293 ccw_device_set_online(adapter->ccw_device);
294 zfcp_erp_wait(adapter);
295 down(&zfcp_data.config_sema);
296 zfcp_unit_put(unit);
297 out_unit:
298 zfcp_port_put(port);
299 out_port:
300 zfcp_adapter_put(adapter);
301 out_adapter:
302 up(&zfcp_data.config_sema);
303 return;
304 }
305
306 static int calc_alignment(int size)
307 {
308 int align = 1;
309
310 if (!size)
311 return 0;
312
313 while ((size - align) > 0)
314 align <<= 1;
315
316 return align;
317 }
318
319 static int __init
320 zfcp_module_init(void)
321 {
322 int retval = -ENOMEM;
323 int size, align;
324
325 size = sizeof(struct zfcp_fsf_req_qtcb);
326 align = calc_alignment(size);
327 zfcp_data.fsf_req_qtcb_cache =
328 kmem_cache_create("zfcp_fsf", size, align, 0, NULL, NULL);
329 if (!zfcp_data.fsf_req_qtcb_cache)
330 goto out;
331
332 size = sizeof(struct fsf_status_read_buffer);
333 align = calc_alignment(size);
334 zfcp_data.sr_buffer_cache =
335 kmem_cache_create("zfcp_sr", size, align, 0, NULL, NULL);
336 if (!zfcp_data.sr_buffer_cache)
337 goto out_sr_cache;
338
339 size = sizeof(struct zfcp_gid_pn_data);
340 align = calc_alignment(size);
341 zfcp_data.gid_pn_cache =
342 kmem_cache_create("zfcp_gid", size, align, 0, NULL, NULL);
343 if (!zfcp_data.gid_pn_cache)
344 goto out_gid_cache;
345
346 atomic_set(&zfcp_data.loglevel, loglevel);
347
348 /* initialize adapter list */
349 INIT_LIST_HEAD(&zfcp_data.adapter_list_head);
350
351 /* initialize adapters to be removed list head */
352 INIT_LIST_HEAD(&zfcp_data.adapter_remove_lh);
353
354 zfcp_data.scsi_transport_template =
355 fc_attach_transport(&zfcp_transport_functions);
356 if (!zfcp_data.scsi_transport_template)
357 goto out_transport;
358
359 retval = misc_register(&zfcp_cfdc_misc);
360 if (retval != 0) {
361 ZFCP_LOG_INFO("registration of misc device "
362 "zfcp_cfdc failed\n");
363 goto out_misc;
364 }
365
366 ZFCP_LOG_TRACE("major/minor for zfcp_cfdc: %d/%d\n",
367 ZFCP_CFDC_DEV_MAJOR, zfcp_cfdc_misc.minor);
368
369 /* Initialise proc semaphores */
370 sema_init(&zfcp_data.config_sema, 1);
371
372 /* initialise configuration rw lock */
373 rwlock_init(&zfcp_data.config_lock);
374
375 /* setup dynamic I/O */
376 retval = zfcp_ccw_register();
377 if (retval) {
378 ZFCP_LOG_NORMAL("registration with common I/O layer failed\n");
379 goto out_ccw_register;
380 }
381
382 if (zfcp_device_setup(device))
383 zfcp_init_device_configure();
384
385 goto out;
386
387 out_ccw_register:
388 misc_deregister(&zfcp_cfdc_misc);
389 out_misc:
390 fc_release_transport(zfcp_data.scsi_transport_template);
391 out_transport:
392 kmem_cache_destroy(zfcp_data.gid_pn_cache);
393 out_gid_cache:
394 kmem_cache_destroy(zfcp_data.sr_buffer_cache);
395 out_sr_cache:
396 kmem_cache_destroy(zfcp_data.fsf_req_qtcb_cache);
397 out:
398 return retval;
399 }
400
401 /*
402 * function: zfcp_cfdc_dev_ioctl
403 *
404 * purpose: Handle control file upload/download transaction via IOCTL
405 * interface
406 *
407 * returns: 0 - Operation completed successfuly
408 * -ENOTTY - Unknown IOCTL command
409 * -EINVAL - Invalid sense data record
410 * -ENXIO - The FCP adapter is not available
411 * -EOPNOTSUPP - The FCP adapter does not have CFDC support
412 * -ENOMEM - Insufficient memory
413 * -EFAULT - User space memory I/O operation fault
414 * -EPERM - Cannot create or queue FSF request or create SBALs
415 * -ERESTARTSYS- Received signal (is mapped to EAGAIN by VFS)
416 */
417 static long
418 zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command,
419 unsigned long buffer)
420 {
421 struct zfcp_cfdc_sense_data *sense_data, __user *sense_data_user;
422 struct zfcp_adapter *adapter = NULL;
423 struct zfcp_fsf_req *fsf_req = NULL;
424 struct zfcp_sg_list *sg_list = NULL;
425 u32 fsf_command, option;
426 char *bus_id = NULL;
427 int retval = 0;
428
429 sense_data = kmalloc(sizeof(struct zfcp_cfdc_sense_data), GFP_KERNEL);
430 if (sense_data == NULL) {
431 retval = -ENOMEM;
432 goto out;
433 }
434
435 sg_list = kzalloc(sizeof(struct zfcp_sg_list), GFP_KERNEL);
436 if (sg_list == NULL) {
437 retval = -ENOMEM;
438 goto out;
439 }
440
441 if (command != ZFCP_CFDC_IOC) {
442 ZFCP_LOG_INFO("IOC request code 0x%x invalid\n", command);
443 retval = -ENOTTY;
444 goto out;
445 }
446
447 if ((sense_data_user = (void __user *) buffer) == NULL) {
448 ZFCP_LOG_INFO("sense data record is required\n");
449 retval = -EINVAL;
450 goto out;
451 }
452
453 retval = copy_from_user(sense_data, sense_data_user,
454 sizeof(struct zfcp_cfdc_sense_data));
455 if (retval) {
456 retval = -EFAULT;
457 goto out;
458 }
459
460 if (sense_data->signature != ZFCP_CFDC_SIGNATURE) {
461 ZFCP_LOG_INFO("invalid sense data request signature 0x%08x\n",
462 ZFCP_CFDC_SIGNATURE);
463 retval = -EINVAL;
464 goto out;
465 }
466
467 switch (sense_data->command) {
468
469 case ZFCP_CFDC_CMND_DOWNLOAD_NORMAL:
470 fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
471 option = FSF_CFDC_OPTION_NORMAL_MODE;
472 break;
473
474 case ZFCP_CFDC_CMND_DOWNLOAD_FORCE:
475 fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
476 option = FSF_CFDC_OPTION_FORCE;
477 break;
478
479 case ZFCP_CFDC_CMND_FULL_ACCESS:
480 fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
481 option = FSF_CFDC_OPTION_FULL_ACCESS;
482 break;
483
484 case ZFCP_CFDC_CMND_RESTRICTED_ACCESS:
485 fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
486 option = FSF_CFDC_OPTION_RESTRICTED_ACCESS;
487 break;
488
489 case ZFCP_CFDC_CMND_UPLOAD:
490 fsf_command = FSF_QTCB_UPLOAD_CONTROL_FILE;
491 option = 0;
492 break;
493
494 default:
495 ZFCP_LOG_INFO("invalid command code 0x%08x\n",
496 sense_data->command);
497 retval = -EINVAL;
498 goto out;
499 }
500
501 bus_id = kmalloc(BUS_ID_SIZE, GFP_KERNEL);
502 if (bus_id == NULL) {
503 retval = -ENOMEM;
504 goto out;
505 }
506 snprintf(bus_id, BUS_ID_SIZE, "%d.%d.%04x",
507 (sense_data->devno >> 24),
508 (sense_data->devno >> 16) & 0xFF,
509 (sense_data->devno & 0xFFFF));
510
511 read_lock_irq(&zfcp_data.config_lock);
512 adapter = zfcp_get_adapter_by_busid(bus_id);
513 if (adapter)
514 zfcp_adapter_get(adapter);
515 read_unlock_irq(&zfcp_data.config_lock);
516
517 kfree(bus_id);
518
519 if (adapter == NULL) {
520 ZFCP_LOG_INFO("invalid adapter\n");
521 retval = -ENXIO;
522 goto out;
523 }
524
525 if (sense_data->command & ZFCP_CFDC_WITH_CONTROL_FILE) {
526 retval = zfcp_sg_list_alloc(sg_list,
527 ZFCP_CFDC_MAX_CONTROL_FILE_SIZE);
528 if (retval) {
529 retval = -ENOMEM;
530 goto out;
531 }
532 }
533
534 if ((sense_data->command & ZFCP_CFDC_DOWNLOAD) &&
535 (sense_data->command & ZFCP_CFDC_WITH_CONTROL_FILE)) {
536 retval = zfcp_sg_list_copy_from_user(
537 sg_list, &sense_data_user->control_file,
538 ZFCP_CFDC_MAX_CONTROL_FILE_SIZE);
539 if (retval) {
540 retval = -EFAULT;
541 goto out;
542 }
543 }
544
545 retval = zfcp_fsf_control_file(adapter, &fsf_req, fsf_command,
546 option, sg_list);
547 if (retval)
548 goto out;
549
550 if ((fsf_req->qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
551 (fsf_req->qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
552 retval = -ENXIO;
553 goto out;
554 }
555
556 sense_data->fsf_status = fsf_req->qtcb->header.fsf_status;
557 memcpy(&sense_data->fsf_status_qual,
558 &fsf_req->qtcb->header.fsf_status_qual,
559 sizeof(union fsf_status_qual));
560 memcpy(&sense_data->payloads, &fsf_req->qtcb->bottom.support.els, 256);
561
562 retval = copy_to_user(sense_data_user, sense_data,
563 sizeof(struct zfcp_cfdc_sense_data));
564 if (retval) {
565 retval = -EFAULT;
566 goto out;
567 }
568
569 if (sense_data->command & ZFCP_CFDC_UPLOAD) {
570 retval = zfcp_sg_list_copy_to_user(
571 &sense_data_user->control_file, sg_list,
572 ZFCP_CFDC_MAX_CONTROL_FILE_SIZE);
573 if (retval) {
574 retval = -EFAULT;
575 goto out;
576 }
577 }
578
579 out:
580 if (fsf_req != NULL)
581 zfcp_fsf_req_free(fsf_req);
582
583 if ((adapter != NULL) && (retval != -ENXIO))
584 zfcp_adapter_put(adapter);
585
586 if (sg_list != NULL) {
587 zfcp_sg_list_free(sg_list);
588 kfree(sg_list);
589 }
590
591 kfree(sense_data);
592
593 return retval;
594 }
595
596
597 /**
598 * zfcp_sg_list_alloc - create a scatter-gather list of the specified size
599 * @sg_list: structure describing a scatter gather list
600 * @size: size of scatter-gather list
601 * Return: 0 on success, else -ENOMEM
602 *
603 * In sg_list->sg a pointer to the created scatter-gather list is returned,
604 * or NULL if we run out of memory. sg_list->count specifies the number of
605 * elements of the scatter-gather list. The maximum size of a single element
606 * in the scatter-gather list is PAGE_SIZE.
607 */
608 static inline int
609 zfcp_sg_list_alloc(struct zfcp_sg_list *sg_list, size_t size)
610 {
611 struct scatterlist *sg;
612 unsigned int i;
613 int retval = 0;
614 void *address;
615
616 BUG_ON(sg_list == NULL);
617
618 sg_list->count = size >> PAGE_SHIFT;
619 if (size & ~PAGE_MASK)
620 sg_list->count++;
621 sg_list->sg = kcalloc(sg_list->count, sizeof(struct scatterlist),
622 GFP_KERNEL);
623 if (sg_list->sg == NULL) {
624 sg_list->count = 0;
625 retval = -ENOMEM;
626 goto out;
627 }
628
629 for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++) {
630 sg->length = min(size, PAGE_SIZE);
631 sg->offset = 0;
632 address = (void *) get_zeroed_page(GFP_KERNEL);
633 if (address == NULL) {
634 sg_list->count = i;
635 zfcp_sg_list_free(sg_list);
636 retval = -ENOMEM;
637 goto out;
638 }
639 zfcp_address_to_sg(address, sg);
640 size -= sg->length;
641 }
642
643 out:
644 return retval;
645 }
646
647
648 /**
649 * zfcp_sg_list_free - free memory of a scatter-gather list
650 * @sg_list: structure describing a scatter-gather list
651 *
652 * Memory for each element in the scatter-gather list is freed.
653 * Finally sg_list->sg is freed itself and sg_list->count is reset.
654 */
655 static inline void
656 zfcp_sg_list_free(struct zfcp_sg_list *sg_list)
657 {
658 struct scatterlist *sg;
659 unsigned int i;
660
661 BUG_ON(sg_list == NULL);
662
663 for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++)
664 free_page((unsigned long) zfcp_sg_to_address(sg));
665
666 sg_list->count = 0;
667 kfree(sg_list->sg);
668 }
669
670 /**
671 * zfcp_sg_size - determine size of a scatter-gather list
672 * @sg: array of (struct scatterlist)
673 * @sg_count: elements in array
674 * Return: size of entire scatter-gather list
675 */
676 size_t
677 zfcp_sg_size(struct scatterlist *sg, unsigned int sg_count)
678 {
679 unsigned int i;
680 struct scatterlist *p;
681 size_t size;
682
683 size = 0;
684 for (i = 0, p = sg; i < sg_count; i++, p++) {
685 BUG_ON(p == NULL);
686 size += p->length;
687 }
688
689 return size;
690 }
691
692
693 /**
694 * zfcp_sg_list_copy_from_user -copy data from user space to scatter-gather list
695 * @sg_list: structure describing a scatter-gather list
696 * @user_buffer: pointer to buffer in user space
697 * @size: number of bytes to be copied
698 * Return: 0 on success, -EFAULT if copy_from_user fails.
699 */
700 static inline int
701 zfcp_sg_list_copy_from_user(struct zfcp_sg_list *sg_list,
702 void __user *user_buffer,
703 size_t size)
704 {
705 struct scatterlist *sg;
706 unsigned int length;
707 void *zfcp_buffer;
708 int retval = 0;
709
710 BUG_ON(sg_list == NULL);
711
712 if (zfcp_sg_size(sg_list->sg, sg_list->count) < size)
713 return -EFAULT;
714
715 for (sg = sg_list->sg; size > 0; sg++) {
716 length = min((unsigned int)size, sg->length);
717 zfcp_buffer = zfcp_sg_to_address(sg);
718 if (copy_from_user(zfcp_buffer, user_buffer, length)) {
719 retval = -EFAULT;
720 goto out;
721 }
722 user_buffer += length;
723 size -= length;
724 }
725
726 out:
727 return retval;
728 }
729
730
731 /**
732 * zfcp_sg_list_copy_to_user - copy data from scatter-gather list to user space
733 * @user_buffer: pointer to buffer in user space
734 * @sg_list: structure describing a scatter-gather list
735 * @size: number of bytes to be copied
736 * Return: 0 on success, -EFAULT if copy_to_user fails
737 */
738 static inline int
739 zfcp_sg_list_copy_to_user(void __user *user_buffer,
740 struct zfcp_sg_list *sg_list,
741 size_t size)
742 {
743 struct scatterlist *sg;
744 unsigned int length;
745 void *zfcp_buffer;
746 int retval = 0;
747
748 BUG_ON(sg_list == NULL);
749
750 if (zfcp_sg_size(sg_list->sg, sg_list->count) < size)
751 return -EFAULT;
752
753 for (sg = sg_list->sg; size > 0; sg++) {
754 length = min((unsigned int) size, sg->length);
755 zfcp_buffer = zfcp_sg_to_address(sg);
756 if (copy_to_user(user_buffer, zfcp_buffer, length)) {
757 retval = -EFAULT;
758 goto out;
759 }
760 user_buffer += length;
761 size -= length;
762 }
763
764 out:
765 return retval;
766 }
767
768
769 #undef ZFCP_LOG_AREA
770
771 /****************************************************************/
772 /****** Functions for configuration/set-up of structures ********/
773 /****************************************************************/
774
775 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG
776
777 /**
778 * zfcp_get_unit_by_lun - find unit in unit list of port by FCP LUN
779 * @port: pointer to port to search for unit
780 * @fcp_lun: FCP LUN to search for
781 * Traverse list of all units of a port and return pointer to a unit
782 * with the given FCP LUN.
783 */
784 struct zfcp_unit *
785 zfcp_get_unit_by_lun(struct zfcp_port *port, fcp_lun_t fcp_lun)
786 {
787 struct zfcp_unit *unit;
788 int found = 0;
789
790 list_for_each_entry(unit, &port->unit_list_head, list) {
791 if ((unit->fcp_lun == fcp_lun) &&
792 !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status))
793 {
794 found = 1;
795 break;
796 }
797 }
798 return found ? unit : NULL;
799 }
800
801 /**
802 * zfcp_get_port_by_wwpn - find port in port list of adapter by wwpn
803 * @adapter: pointer to adapter to search for port
804 * @wwpn: wwpn to search for
805 * Traverse list of all ports of an adapter and return pointer to a port
806 * with the given wwpn.
807 */
808 struct zfcp_port *
809 zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter, wwn_t wwpn)
810 {
811 struct zfcp_port *port;
812 int found = 0;
813
814 list_for_each_entry(port, &adapter->port_list_head, list) {
815 if ((port->wwpn == wwpn) &&
816 !(atomic_read(&port->status) &
817 (ZFCP_STATUS_PORT_NO_WWPN | ZFCP_STATUS_COMMON_REMOVE))) {
818 found = 1;
819 break;
820 }
821 }
822 return found ? port : NULL;
823 }
824
825 /**
826 * zfcp_get_port_by_did - find port in port list of adapter by d_id
827 * @adapter: pointer to adapter to search for port
828 * @d_id: d_id to search for
829 * Traverse list of all ports of an adapter and return pointer to a port
830 * with the given d_id.
831 */
832 struct zfcp_port *
833 zfcp_get_port_by_did(struct zfcp_adapter *adapter, u32 d_id)
834 {
835 struct zfcp_port *port;
836 int found = 0;
837
838 list_for_each_entry(port, &adapter->port_list_head, list) {
839 if ((port->d_id == d_id) &&
840 !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status))
841 {
842 found = 1;
843 break;
844 }
845 }
846 return found ? port : NULL;
847 }
848
849 /**
850 * zfcp_get_adapter_by_busid - find adpater in adapter list by bus_id
851 * @bus_id: bus_id to search for
852 * Traverse list of all adapters and return pointer to an adapter
853 * with the given bus_id.
854 */
855 struct zfcp_adapter *
856 zfcp_get_adapter_by_busid(char *bus_id)
857 {
858 struct zfcp_adapter *adapter;
859 int found = 0;
860
861 list_for_each_entry(adapter, &zfcp_data.adapter_list_head, list) {
862 if ((strncmp(bus_id, zfcp_get_busid_by_adapter(adapter),
863 BUS_ID_SIZE) == 0) &&
864 !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE,
865 &adapter->status)){
866 found = 1;
867 break;
868 }
869 }
870 return found ? adapter : NULL;
871 }
872
873 /**
874 * zfcp_unit_enqueue - enqueue unit to unit list of a port.
875 * @port: pointer to port where unit is added
876 * @fcp_lun: FCP LUN of unit to be enqueued
877 * Return: pointer to enqueued unit on success, NULL on error
878 * Locks: config_sema must be held to serialize changes to the unit list
879 *
880 * Sets up some unit internal structures and creates sysfs entry.
881 */
882 struct zfcp_unit *
883 zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun)
884 {
885 struct zfcp_unit *unit, *tmp_unit;
886 unsigned int scsi_lun;
887 int found;
888
889 /*
890 * check that there is no unit with this FCP_LUN already in list
891 * and enqueue it.
892 * Note: Unlike for the adapter and the port, this is an error
893 */
894 read_lock_irq(&zfcp_data.config_lock);
895 unit = zfcp_get_unit_by_lun(port, fcp_lun);
896 read_unlock_irq(&zfcp_data.config_lock);
897 if (unit)
898 return NULL;
899
900 unit = kzalloc(sizeof (struct zfcp_unit), GFP_KERNEL);
901 if (!unit)
902 return NULL;
903
904 /* initialise reference count stuff */
905 atomic_set(&unit->refcount, 0);
906 init_waitqueue_head(&unit->remove_wq);
907
908 unit->port = port;
909 unit->fcp_lun = fcp_lun;
910
911 /* setup for sysfs registration */
912 snprintf(unit->sysfs_device.bus_id, BUS_ID_SIZE, "0x%016llx", fcp_lun);
913 unit->sysfs_device.parent = &port->sysfs_device;
914 unit->sysfs_device.release = zfcp_sysfs_unit_release;
915 dev_set_drvdata(&unit->sysfs_device, unit);
916
917 /* mark unit unusable as long as sysfs registration is not complete */
918 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
919
920 if (device_register(&unit->sysfs_device)) {
921 kfree(unit);
922 return NULL;
923 }
924
925 if (zfcp_sysfs_unit_create_files(&unit->sysfs_device)) {
926 device_unregister(&unit->sysfs_device);
927 return NULL;
928 }
929
930 zfcp_unit_get(unit);
931
932 scsi_lun = 0;
933 found = 0;
934 write_lock_irq(&zfcp_data.config_lock);
935 list_for_each_entry(tmp_unit, &port->unit_list_head, list) {
936 if (tmp_unit->scsi_lun != scsi_lun) {
937 found = 1;
938 break;
939 }
940 scsi_lun++;
941 }
942 unit->scsi_lun = scsi_lun;
943 if (found)
944 list_add_tail(&unit->list, &tmp_unit->list);
945 else
946 list_add_tail(&unit->list, &port->unit_list_head);
947 atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
948 atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status);
949 write_unlock_irq(&zfcp_data.config_lock);
950
951 port->units++;
952 zfcp_port_get(port);
953
954 return unit;
955 }
956
957 void
958 zfcp_unit_dequeue(struct zfcp_unit *unit)
959 {
960 zfcp_unit_wait(unit);
961 write_lock_irq(&zfcp_data.config_lock);
962 list_del(&unit->list);
963 write_unlock_irq(&zfcp_data.config_lock);
964 unit->port->units--;
965 zfcp_port_put(unit->port);
966 zfcp_sysfs_unit_remove_files(&unit->sysfs_device);
967 device_unregister(&unit->sysfs_device);
968 }
969
970 /*
971 * Allocates a combined QTCB/fsf_req buffer for erp actions and fcp/SCSI
972 * commands.
973 * It also genrates fcp-nameserver request/response buffer and unsolicited
974 * status read fsf_req buffers.
975 *
976 * locks: must only be called with zfcp_data.config_sema taken
977 */
978 static int
979 zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter)
980 {
981 adapter->pool.fsf_req_erp =
982 mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_ERP_NR,
983 zfcp_data.fsf_req_qtcb_cache);
984 if (!adapter->pool.fsf_req_erp)
985 return -ENOMEM;
986
987 adapter->pool.fsf_req_scsi =
988 mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_SCSI_NR,
989 zfcp_data.fsf_req_qtcb_cache);
990 if (!adapter->pool.fsf_req_scsi)
991 return -ENOMEM;
992
993 adapter->pool.fsf_req_abort =
994 mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_ABORT_NR,
995 zfcp_data.fsf_req_qtcb_cache);
996 if (!adapter->pool.fsf_req_abort)
997 return -ENOMEM;
998
999 adapter->pool.fsf_req_status_read =
1000 mempool_create_kmalloc_pool(ZFCP_POOL_STATUS_READ_NR,
1001 sizeof(struct zfcp_fsf_req));
1002 if (!adapter->pool.fsf_req_status_read)
1003 return -ENOMEM;
1004
1005 adapter->pool.data_status_read =
1006 mempool_create_slab_pool(ZFCP_POOL_STATUS_READ_NR,
1007 zfcp_data.sr_buffer_cache);
1008 if (!adapter->pool.data_status_read)
1009 return -ENOMEM;
1010
1011 adapter->pool.data_gid_pn =
1012 mempool_create_slab_pool(ZFCP_POOL_DATA_GID_PN_NR,
1013 zfcp_data.gid_pn_cache);
1014 if (!adapter->pool.data_gid_pn)
1015 return -ENOMEM;
1016
1017 return 0;
1018 }
1019
1020 /**
1021 * zfcp_free_low_mem_buffers - free memory pools of an adapter
1022 * @adapter: pointer to zfcp_adapter for which memory pools should be freed
1023 * locking: zfcp_data.config_sema must be held
1024 */
1025 static void
1026 zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter)
1027 {
1028 if (adapter->pool.fsf_req_erp)
1029 mempool_destroy(adapter->pool.fsf_req_erp);
1030 if (adapter->pool.fsf_req_scsi)
1031 mempool_destroy(adapter->pool.fsf_req_scsi);
1032 if (adapter->pool.fsf_req_abort)
1033 mempool_destroy(adapter->pool.fsf_req_abort);
1034 if (adapter->pool.fsf_req_status_read)
1035 mempool_destroy(adapter->pool.fsf_req_status_read);
1036 if (adapter->pool.data_status_read)
1037 mempool_destroy(adapter->pool.data_status_read);
1038 if (adapter->pool.data_gid_pn)
1039 mempool_destroy(adapter->pool.data_gid_pn);
1040 }
1041
1042 void
1043 zfcp_dummy_release(struct device *dev)
1044 {
1045 return;
1046 }
1047
1048 /*
1049 * Enqueues an adapter at the end of the adapter list in the driver data.
1050 * All adapter internal structures are set up.
1051 * Proc-fs entries are also created.
1052 *
1053 * returns: 0 if a new adapter was successfully enqueued
1054 * ZFCP_KNOWN if an adapter with this devno was already present
1055 * -ENOMEM if alloc failed
1056 * locks: config_sema must be held to serialise changes to the adapter list
1057 */
1058 struct zfcp_adapter *
1059 zfcp_adapter_enqueue(struct ccw_device *ccw_device)
1060 {
1061 int retval = 0;
1062 struct zfcp_adapter *adapter;
1063
1064 /*
1065 * Note: It is safe to release the list_lock, as any list changes
1066 * are protected by the config_sema, which must be held to get here
1067 */
1068
1069 /* try to allocate new adapter data structure (zeroed) */
1070 adapter = kzalloc(sizeof (struct zfcp_adapter), GFP_KERNEL);
1071 if (!adapter) {
1072 ZFCP_LOG_INFO("error: allocation of base adapter "
1073 "structure failed\n");
1074 goto out;
1075 }
1076
1077 ccw_device->handler = NULL;
1078
1079 /* save ccw_device pointer */
1080 adapter->ccw_device = ccw_device;
1081
1082 retval = zfcp_qdio_allocate_queues(adapter);
1083 if (retval)
1084 goto queues_alloc_failed;
1085
1086 retval = zfcp_qdio_allocate(adapter);
1087 if (retval)
1088 goto qdio_allocate_failed;
1089
1090 retval = zfcp_allocate_low_mem_buffers(adapter);
1091 if (retval) {
1092 ZFCP_LOG_INFO("error: pool allocation failed\n");
1093 goto failed_low_mem_buffers;
1094 }
1095
1096 /* initialise reference count stuff */
1097 atomic_set(&adapter->refcount, 0);
1098 init_waitqueue_head(&adapter->remove_wq);
1099
1100 /* initialise list of ports */
1101 INIT_LIST_HEAD(&adapter->port_list_head);
1102
1103 /* initialise list of ports to be removed */
1104 INIT_LIST_HEAD(&adapter->port_remove_lh);
1105
1106 /* initialize list of fsf requests */
1107 spin_lock_init(&adapter->req_list_lock);
1108 retval = zfcp_reqlist_init(adapter);
1109 if (retval) {
1110 ZFCP_LOG_INFO("request list initialization failed\n");
1111 goto failed_low_mem_buffers;
1112 }
1113
1114 /* initialize debug locks */
1115
1116 spin_lock_init(&adapter->erp_dbf_lock);
1117 spin_lock_init(&adapter->hba_dbf_lock);
1118 spin_lock_init(&adapter->san_dbf_lock);
1119 spin_lock_init(&adapter->scsi_dbf_lock);
1120
1121 /* initialize error recovery stuff */
1122
1123 rwlock_init(&adapter->erp_lock);
1124 sema_init(&adapter->erp_ready_sem, 0);
1125 INIT_LIST_HEAD(&adapter->erp_ready_head);
1126 INIT_LIST_HEAD(&adapter->erp_running_head);
1127
1128 /* initialize abort lock */
1129 rwlock_init(&adapter->abort_lock);
1130
1131 /* initialise some erp stuff */
1132 init_waitqueue_head(&adapter->erp_thread_wqh);
1133 init_waitqueue_head(&adapter->erp_done_wqh);
1134
1135 /* initialize lock of associated request queue */
1136 rwlock_init(&adapter->request_queue.queue_lock);
1137
1138 /* mark adapter unusable as long as sysfs registration is not complete */
1139 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
1140
1141 adapter->ccw_device = ccw_device;
1142 dev_set_drvdata(&ccw_device->dev, adapter);
1143
1144 if (zfcp_sysfs_adapter_create_files(&ccw_device->dev))
1145 goto sysfs_failed;
1146
1147 adapter->generic_services.parent = &adapter->ccw_device->dev;
1148 adapter->generic_services.release = zfcp_dummy_release;
1149 snprintf(adapter->generic_services.bus_id, BUS_ID_SIZE,
1150 "generic_services");
1151
1152 if (device_register(&adapter->generic_services))
1153 goto generic_services_failed;
1154
1155 /* put allocated adapter at list tail */
1156 write_lock_irq(&zfcp_data.config_lock);
1157 atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
1158 list_add_tail(&adapter->list, &zfcp_data.adapter_list_head);
1159 write_unlock_irq(&zfcp_data.config_lock);
1160
1161 zfcp_data.adapters++;
1162
1163 goto out;
1164
1165 generic_services_failed:
1166 zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev);
1167 sysfs_failed:
1168 dev_set_drvdata(&ccw_device->dev, NULL);
1169 failed_low_mem_buffers:
1170 zfcp_free_low_mem_buffers(adapter);
1171 if (qdio_free(ccw_device) != 0)
1172 ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n",
1173 zfcp_get_busid_by_adapter(adapter));
1174 qdio_allocate_failed:
1175 zfcp_qdio_free_queues(adapter);
1176 queues_alloc_failed:
1177 kfree(adapter);
1178 adapter = NULL;
1179 out:
1180 return adapter;
1181 }
1182
1183 /*
1184 * returns: 0 - struct zfcp_adapter data structure successfully removed
1185 * !0 - struct zfcp_adapter data structure could not be removed
1186 * (e.g. still used)
1187 * locks: adapter list write lock is assumed to be held by caller
1188 */
1189 void
1190 zfcp_adapter_dequeue(struct zfcp_adapter *adapter)
1191 {
1192 int retval = 0;
1193 unsigned long flags;
1194
1195 device_unregister(&adapter->generic_services);
1196 zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev);
1197 dev_set_drvdata(&adapter->ccw_device->dev, NULL);
1198 /* sanity check: no pending FSF requests */
1199 spin_lock_irqsave(&adapter->req_list_lock, flags);
1200 retval = zfcp_reqlist_isempty(adapter);
1201 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
1202 if (!retval) {
1203 ZFCP_LOG_NORMAL("bug: adapter %s (%p) still in use, "
1204 "%i requests outstanding\n",
1205 zfcp_get_busid_by_adapter(adapter), adapter,
1206 atomic_read(&adapter->reqs_active));
1207 retval = -EBUSY;
1208 goto out;
1209 }
1210
1211 /* remove specified adapter data structure from list */
1212 write_lock_irq(&zfcp_data.config_lock);
1213 list_del(&adapter->list);
1214 write_unlock_irq(&zfcp_data.config_lock);
1215
1216 /* decrease number of adapters in list */
1217 zfcp_data.adapters--;
1218
1219 ZFCP_LOG_TRACE("adapter %s (%p) removed from list, "
1220 "%i adapters still in list\n",
1221 zfcp_get_busid_by_adapter(adapter),
1222 adapter, zfcp_data.adapters);
1223
1224 retval = qdio_free(adapter->ccw_device);
1225 if (retval)
1226 ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n",
1227 zfcp_get_busid_by_adapter(adapter));
1228
1229 zfcp_free_low_mem_buffers(adapter);
1230 /* free memory of adapter data structure and queues */
1231 zfcp_qdio_free_queues(adapter);
1232 zfcp_reqlist_free(adapter);
1233 kfree(adapter->fc_stats);
1234 kfree(adapter->stats_reset_data);
1235 ZFCP_LOG_TRACE("freeing adapter structure\n");
1236 kfree(adapter);
1237 out:
1238 return;
1239 }
1240
1241 /**
1242 * zfcp_port_enqueue - enqueue port to port list of adapter
1243 * @adapter: adapter where remote port is added
1244 * @wwpn: WWPN of the remote port to be enqueued
1245 * @status: initial status for the port
1246 * @d_id: destination id of the remote port to be enqueued
1247 * Return: pointer to enqueued port on success, NULL on error
1248 * Locks: config_sema must be held to serialize changes to the port list
1249 *
1250 * All port internal structures are set up and the sysfs entry is generated.
1251 * d_id is used to enqueue ports with a well known address like the Directory
1252 * Service for nameserver lookup.
1253 */
1254 struct zfcp_port *
1255 zfcp_port_enqueue(struct zfcp_adapter *adapter, wwn_t wwpn, u32 status,
1256 u32 d_id)
1257 {
1258 struct zfcp_port *port;
1259 int check_wwpn;
1260
1261 check_wwpn = !(status & ZFCP_STATUS_PORT_NO_WWPN);
1262 /*
1263 * check that there is no port with this WWPN already in list
1264 */
1265 if (check_wwpn) {
1266 read_lock_irq(&zfcp_data.config_lock);
1267 port = zfcp_get_port_by_wwpn(adapter, wwpn);
1268 read_unlock_irq(&zfcp_data.config_lock);
1269 if (port)
1270 return NULL;
1271 }
1272
1273 port = kzalloc(sizeof (struct zfcp_port), GFP_KERNEL);
1274 if (!port)
1275 return NULL;
1276
1277 /* initialise reference count stuff */
1278 atomic_set(&port->refcount, 0);
1279 init_waitqueue_head(&port->remove_wq);
1280
1281 INIT_LIST_HEAD(&port->unit_list_head);
1282 INIT_LIST_HEAD(&port->unit_remove_lh);
1283
1284 port->adapter = adapter;
1285
1286 if (check_wwpn)
1287 port->wwpn = wwpn;
1288
1289 atomic_set_mask(status, &port->status);
1290
1291 /* setup for sysfs registration */
1292 if (status & ZFCP_STATUS_PORT_WKA) {
1293 switch (d_id) {
1294 case ZFCP_DID_DIRECTORY_SERVICE:
1295 snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
1296 "directory");
1297 break;
1298 case ZFCP_DID_MANAGEMENT_SERVICE:
1299 snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
1300 "management");
1301 break;
1302 case ZFCP_DID_KEY_DISTRIBUTION_SERVICE:
1303 snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
1304 "key_distribution");
1305 break;
1306 case ZFCP_DID_ALIAS_SERVICE:
1307 snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
1308 "alias");
1309 break;
1310 case ZFCP_DID_TIME_SERVICE:
1311 snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
1312 "time");
1313 break;
1314 default:
1315 kfree(port);
1316 return NULL;
1317 }
1318 port->d_id = d_id;
1319 port->sysfs_device.parent = &adapter->generic_services;
1320 } else {
1321 snprintf(port->sysfs_device.bus_id,
1322 BUS_ID_SIZE, "0x%016llx", wwpn);
1323 port->sysfs_device.parent = &adapter->ccw_device->dev;
1324 }
1325 port->sysfs_device.release = zfcp_sysfs_port_release;
1326 dev_set_drvdata(&port->sysfs_device, port);
1327
1328 /* mark port unusable as long as sysfs registration is not complete */
1329 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
1330
1331 if (device_register(&port->sysfs_device)) {
1332 kfree(port);
1333 return NULL;
1334 }
1335
1336 if (zfcp_sysfs_port_create_files(&port->sysfs_device, status)) {
1337 device_unregister(&port->sysfs_device);
1338 return NULL;
1339 }
1340
1341 zfcp_port_get(port);
1342
1343 write_lock_irq(&zfcp_data.config_lock);
1344 list_add_tail(&port->list, &adapter->port_list_head);
1345 atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
1346 atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &port->status);
1347 if (d_id == ZFCP_DID_DIRECTORY_SERVICE)
1348 if (!adapter->nameserver_port)
1349 adapter->nameserver_port = port;
1350 adapter->ports++;
1351 write_unlock_irq(&zfcp_data.config_lock);
1352
1353 zfcp_adapter_get(adapter);
1354
1355 return port;
1356 }
1357
1358 void
1359 zfcp_port_dequeue(struct zfcp_port *port)
1360 {
1361 zfcp_port_wait(port);
1362 write_lock_irq(&zfcp_data.config_lock);
1363 list_del(&port->list);
1364 port->adapter->ports--;
1365 write_unlock_irq(&zfcp_data.config_lock);
1366 if (port->rport)
1367 fc_remote_port_delete(port->rport);
1368 port->rport = NULL;
1369 zfcp_adapter_put(port->adapter);
1370 zfcp_sysfs_port_remove_files(&port->sysfs_device,
1371 atomic_read(&port->status));
1372 device_unregister(&port->sysfs_device);
1373 }
1374
1375 /* Enqueues a nameserver port */
1376 int
1377 zfcp_nameserver_enqueue(struct zfcp_adapter *adapter)
1378 {
1379 struct zfcp_port *port;
1380
1381 port = zfcp_port_enqueue(adapter, 0, ZFCP_STATUS_PORT_WKA,
1382 ZFCP_DID_DIRECTORY_SERVICE);
1383 if (!port) {
1384 ZFCP_LOG_INFO("error: enqueue of nameserver port for "
1385 "adapter %s failed\n",
1386 zfcp_get_busid_by_adapter(adapter));
1387 return -ENXIO;
1388 }
1389 zfcp_port_put(port);
1390
1391 return 0;
1392 }
1393
1394 #undef ZFCP_LOG_AREA
1395
1396 /****************************************************************/
1397 /******* Fibre Channel Standard related Functions **************/
1398 /****************************************************************/
1399
1400 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_FC
1401
1402 void
1403 zfcp_fsf_incoming_els_rscn(struct zfcp_adapter *adapter,
1404 struct fsf_status_read_buffer *status_buffer)
1405 {
1406 struct fcp_rscn_head *fcp_rscn_head;
1407 struct fcp_rscn_element *fcp_rscn_element;
1408 struct zfcp_port *port;
1409 u16 i;
1410 u16 no_entries;
1411 u32 range_mask;
1412 unsigned long flags;
1413
1414 fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload;
1415 fcp_rscn_element = (struct fcp_rscn_element *) status_buffer->payload;
1416
1417 /* see FC-FS */
1418 no_entries = (fcp_rscn_head->payload_len / 4);
1419
1420 for (i = 1; i < no_entries; i++) {
1421 /* skip head and start with 1st element */
1422 fcp_rscn_element++;
1423 switch (fcp_rscn_element->addr_format) {
1424 case ZFCP_PORT_ADDRESS:
1425 range_mask = ZFCP_PORTS_RANGE_PORT;
1426 break;
1427 case ZFCP_AREA_ADDRESS:
1428 range_mask = ZFCP_PORTS_RANGE_AREA;
1429 break;
1430 case ZFCP_DOMAIN_ADDRESS:
1431 range_mask = ZFCP_PORTS_RANGE_DOMAIN;
1432 break;
1433 case ZFCP_FABRIC_ADDRESS:
1434 range_mask = ZFCP_PORTS_RANGE_FABRIC;
1435 break;
1436 default:
1437 ZFCP_LOG_INFO("incoming RSCN with unknown "
1438 "address format\n");
1439 continue;
1440 }
1441 read_lock_irqsave(&zfcp_data.config_lock, flags);
1442 list_for_each_entry(port, &adapter->port_list_head, list) {
1443 if (atomic_test_mask
1444 (ZFCP_STATUS_PORT_WKA, &port->status))
1445 continue;
1446 /* Do we know this port? If not skip it. */
1447 if (!atomic_test_mask
1448 (ZFCP_STATUS_PORT_DID_DID, &port->status)) {
1449 ZFCP_LOG_INFO("incoming RSCN, trying to open "
1450 "port 0x%016Lx\n", port->wwpn);
1451 zfcp_erp_port_reopen(port,
1452 ZFCP_STATUS_COMMON_ERP_FAILED);
1453 continue;
1454 }
1455
1456 /*
1457 * FIXME: race: d_id might being invalidated
1458 * (...DID_DID reset)
1459 */
1460 if ((port->d_id & range_mask)
1461 == (fcp_rscn_element->nport_did & range_mask)) {
1462 ZFCP_LOG_TRACE("reopen did 0x%08x\n",
1463 fcp_rscn_element->nport_did);
1464 /*
1465 * Unfortunately, an RSCN does not specify the
1466 * type of change a target underwent. We assume
1467 * that it makes sense to reopen the link.
1468 * FIXME: Shall we try to find out more about
1469 * the target and link state before closing it?
1470 * How to accomplish this? (nameserver?)
1471 * Where would such code be put in?
1472 * (inside or outside erp)
1473 */
1474 ZFCP_LOG_INFO("incoming RSCN, trying to open "
1475 "port 0x%016Lx\n", port->wwpn);
1476 zfcp_test_link(port);
1477 }
1478 }
1479 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1480 }
1481 }
1482
1483 static void
1484 zfcp_fsf_incoming_els_plogi(struct zfcp_adapter *adapter,
1485 struct fsf_status_read_buffer *status_buffer)
1486 {
1487 struct fsf_plogi *els_plogi;
1488 struct zfcp_port *port;
1489 unsigned long flags;
1490
1491 els_plogi = (struct fsf_plogi *) status_buffer->payload;
1492 read_lock_irqsave(&zfcp_data.config_lock, flags);
1493 list_for_each_entry(port, &adapter->port_list_head, list) {
1494 if (port->wwpn == (*(wwn_t *) &els_plogi->serv_param.wwpn))
1495 break;
1496 }
1497 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1498
1499 if (!port || (port->wwpn != (*(wwn_t *) &els_plogi->serv_param.wwpn))) {
1500 ZFCP_LOG_DEBUG("ignored incoming PLOGI for nonexisting port "
1501 "with d_id 0x%08x on adapter %s\n",
1502 status_buffer->d_id,
1503 zfcp_get_busid_by_adapter(adapter));
1504 } else {
1505 zfcp_erp_port_forced_reopen(port, 0);
1506 }
1507 }
1508
1509 static void
1510 zfcp_fsf_incoming_els_logo(struct zfcp_adapter *adapter,
1511 struct fsf_status_read_buffer *status_buffer)
1512 {
1513 struct fcp_logo *els_logo = (struct fcp_logo *) status_buffer->payload;
1514 struct zfcp_port *port;
1515 unsigned long flags;
1516
1517 read_lock_irqsave(&zfcp_data.config_lock, flags);
1518 list_for_each_entry(port, &adapter->port_list_head, list) {
1519 if (port->wwpn == els_logo->nport_wwpn)
1520 break;
1521 }
1522 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1523
1524 if (!port || (port->wwpn != els_logo->nport_wwpn)) {
1525 ZFCP_LOG_DEBUG("ignored incoming LOGO for nonexisting port "
1526 "with d_id 0x%08x on adapter %s\n",
1527 status_buffer->d_id,
1528 zfcp_get_busid_by_adapter(adapter));
1529 } else {
1530 zfcp_erp_port_forced_reopen(port, 0);
1531 }
1532 }
1533
1534 static void
1535 zfcp_fsf_incoming_els_unknown(struct zfcp_adapter *adapter,
1536 struct fsf_status_read_buffer *status_buffer)
1537 {
1538 ZFCP_LOG_NORMAL("warning: unknown incoming ELS 0x%08x "
1539 "for adapter %s\n", *(u32 *) (status_buffer->payload),
1540 zfcp_get_busid_by_adapter(adapter));
1541
1542 }
1543
1544 void
1545 zfcp_fsf_incoming_els(struct zfcp_fsf_req *fsf_req)
1546 {
1547 struct fsf_status_read_buffer *status_buffer;
1548 u32 els_type;
1549 struct zfcp_adapter *adapter;
1550
1551 status_buffer = (struct fsf_status_read_buffer *) fsf_req->data;
1552 els_type = *(u32 *) (status_buffer->payload);
1553 adapter = fsf_req->adapter;
1554
1555 zfcp_san_dbf_event_incoming_els(fsf_req);
1556 if (els_type == LS_PLOGI)
1557 zfcp_fsf_incoming_els_plogi(adapter, status_buffer);
1558 else if (els_type == LS_LOGO)
1559 zfcp_fsf_incoming_els_logo(adapter, status_buffer);
1560 else if ((els_type & 0xffff0000) == LS_RSCN)
1561 /* we are only concerned with the command, not the length */
1562 zfcp_fsf_incoming_els_rscn(adapter, status_buffer);
1563 else
1564 zfcp_fsf_incoming_els_unknown(adapter, status_buffer);
1565 }
1566
1567
1568 /**
1569 * zfcp_gid_pn_buffers_alloc - allocate buffers for GID_PN nameserver request
1570 * @gid_pn: pointer to return pointer to struct zfcp_gid_pn_data
1571 * @pool: pointer to mempool_t if non-null memory pool is used for allocation
1572 */
1573 static int
1574 zfcp_gid_pn_buffers_alloc(struct zfcp_gid_pn_data **gid_pn, mempool_t *pool)
1575 {
1576 struct zfcp_gid_pn_data *data;
1577
1578 if (pool != NULL) {
1579 data = mempool_alloc(pool, GFP_ATOMIC);
1580 if (likely(data != NULL)) {
1581 data->ct.pool = pool;
1582 }
1583 } else {
1584 data = kmalloc(sizeof(struct zfcp_gid_pn_data), GFP_ATOMIC);
1585 }
1586
1587 if (NULL == data)
1588 return -ENOMEM;
1589
1590 memset(data, 0, sizeof(*data));
1591 data->ct.req = &data->req;
1592 data->ct.resp = &data->resp;
1593 data->ct.req_count = data->ct.resp_count = 1;
1594 zfcp_address_to_sg(&data->ct_iu_req, &data->req);
1595 zfcp_address_to_sg(&data->ct_iu_resp, &data->resp);
1596 data->req.length = sizeof(struct ct_iu_gid_pn_req);
1597 data->resp.length = sizeof(struct ct_iu_gid_pn_resp);
1598
1599 *gid_pn = data;
1600 return 0;
1601 }
1602
1603 /**
1604 * zfcp_gid_pn_buffers_free - free buffers for GID_PN nameserver request
1605 * @gid_pn: pointer to struct zfcp_gid_pn_data which has to be freed
1606 */
1607 static void
1608 zfcp_gid_pn_buffers_free(struct zfcp_gid_pn_data *gid_pn)
1609 {
1610 if ((gid_pn->ct.pool != 0))
1611 mempool_free(gid_pn, gid_pn->ct.pool);
1612 else
1613 kfree(gid_pn);
1614
1615 return;
1616 }
1617
1618 /**
1619 * zfcp_ns_gid_pn_request - initiate GID_PN nameserver request
1620 * @erp_action: pointer to zfcp_erp_action where GID_PN request is needed
1621 */
1622 int
1623 zfcp_ns_gid_pn_request(struct zfcp_erp_action *erp_action)
1624 {
1625 int ret;
1626 struct ct_iu_gid_pn_req *ct_iu_req;
1627 struct zfcp_gid_pn_data *gid_pn;
1628 struct zfcp_adapter *adapter = erp_action->adapter;
1629
1630 ret = zfcp_gid_pn_buffers_alloc(&gid_pn, adapter->pool.data_gid_pn);
1631 if (ret < 0) {
1632 ZFCP_LOG_INFO("error: buffer allocation for gid_pn nameserver "
1633 "request failed for adapter %s\n",
1634 zfcp_get_busid_by_adapter(adapter));
1635 goto out;
1636 }
1637
1638 /* setup nameserver request */
1639 ct_iu_req = zfcp_sg_to_address(gid_pn->ct.req);
1640 ct_iu_req->header.revision = ZFCP_CT_REVISION;
1641 ct_iu_req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE;
1642 ct_iu_req->header.gs_subtype = ZFCP_CT_NAME_SERVER;
1643 ct_iu_req->header.options = ZFCP_CT_SYNCHRONOUS;
1644 ct_iu_req->header.cmd_rsp_code = ZFCP_CT_GID_PN;
1645 ct_iu_req->header.max_res_size = ZFCP_CT_MAX_SIZE;
1646 ct_iu_req->wwpn = erp_action->port->wwpn;
1647
1648 /* setup parameters for send generic command */
1649 gid_pn->ct.port = adapter->nameserver_port;
1650 gid_pn->ct.handler = zfcp_ns_gid_pn_handler;
1651 gid_pn->ct.handler_data = (unsigned long) gid_pn;
1652 gid_pn->ct.timeout = ZFCP_NS_GID_PN_TIMEOUT;
1653 gid_pn->port = erp_action->port;
1654
1655 ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.fsf_req_erp,
1656 erp_action);
1657 if (ret) {
1658 ZFCP_LOG_INFO("error: initiation of gid_pn nameserver request "
1659 "failed for adapter %s\n",
1660 zfcp_get_busid_by_adapter(adapter));
1661
1662 zfcp_gid_pn_buffers_free(gid_pn);
1663 }
1664
1665 out:
1666 return ret;
1667 }
1668
1669 /**
1670 * zfcp_ns_gid_pn_handler - handler for GID_PN nameserver request
1671 * @data: unsigned long, contains pointer to struct zfcp_gid_pn_data
1672 */
1673 static void zfcp_ns_gid_pn_handler(unsigned long data)
1674 {
1675 struct zfcp_port *port;
1676 struct zfcp_send_ct *ct;
1677 struct ct_iu_gid_pn_req *ct_iu_req;
1678 struct ct_iu_gid_pn_resp *ct_iu_resp;
1679 struct zfcp_gid_pn_data *gid_pn;
1680
1681
1682 gid_pn = (struct zfcp_gid_pn_data *) data;
1683 port = gid_pn->port;
1684 ct = &gid_pn->ct;
1685 ct_iu_req = zfcp_sg_to_address(ct->req);
1686 ct_iu_resp = zfcp_sg_to_address(ct->resp);
1687
1688 if (ct->status != 0)
1689 goto failed;
1690
1691 if (zfcp_check_ct_response(&ct_iu_resp->header)) {
1692 /* FIXME: do we need some specific erp entry points */
1693 atomic_set_mask(ZFCP_STATUS_PORT_INVALID_WWPN, &port->status);
1694 goto failed;
1695 }
1696 /* paranoia */
1697 if (ct_iu_req->wwpn != port->wwpn) {
1698 ZFCP_LOG_NORMAL("bug: wwpn 0x%016Lx returned by nameserver "
1699 "lookup does not match expected wwpn 0x%016Lx "
1700 "for adapter %s\n", ct_iu_req->wwpn, port->wwpn,
1701 zfcp_get_busid_by_port(port));
1702 goto mismatch;
1703 }
1704
1705 /* looks like a valid d_id */
1706 port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK;
1707 atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status);
1708 ZFCP_LOG_DEBUG("adapter %s: wwpn=0x%016Lx ---> d_id=0x%08x\n",
1709 zfcp_get_busid_by_port(port), port->wwpn, port->d_id);
1710 goto out;
1711
1712 mismatch:
1713 ZFCP_LOG_DEBUG("CT IUs do not match:\n");
1714 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) ct_iu_req,
1715 sizeof(struct ct_iu_gid_pn_req));
1716 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) ct_iu_resp,
1717 sizeof(struct ct_iu_gid_pn_resp));
1718
1719 failed:
1720 ZFCP_LOG_NORMAL("warning: failed gid_pn nameserver request for wwpn "
1721 "0x%016Lx for adapter %s\n",
1722 port->wwpn, zfcp_get_busid_by_port(port));
1723 out:
1724 zfcp_gid_pn_buffers_free(gid_pn);
1725 return;
1726 }
1727
1728 /* reject CT_IU reason codes acc. to FC-GS-4 */
1729 static const struct zfcp_rc_entry zfcp_ct_rc[] = {
1730 {0x01, "invalid command code"},
1731 {0x02, "invalid version level"},
1732 {0x03, "logical error"},
1733 {0x04, "invalid CT_IU size"},
1734 {0x05, "logical busy"},
1735 {0x07, "protocol error"},
1736 {0x09, "unable to perform command request"},
1737 {0x0b, "command not supported"},
1738 {0x0d, "server not available"},
1739 {0x0e, "session could not be established"},
1740 {0xff, "vendor specific error"},
1741 {0, NULL},
1742 };
1743
1744 /* LS_RJT reason codes acc. to FC-FS */
1745 static const struct zfcp_rc_entry zfcp_ls_rjt_rc[] = {
1746 {0x01, "invalid LS_Command code"},
1747 {0x03, "logical error"},
1748 {0x05, "logical busy"},
1749 {0x07, "protocol error"},
1750 {0x09, "unable to perform command request"},
1751 {0x0b, "command not supported"},
1752 {0x0e, "command already in progress"},
1753 {0xff, "vendor specific error"},
1754 {0, NULL},
1755 };
1756
1757 /* reject reason codes according to FC-PH/FC-FS */
1758 static const struct zfcp_rc_entry zfcp_p_rjt_rc[] = {
1759 {0x01, "invalid D_ID"},
1760 {0x02, "invalid S_ID"},
1761 {0x03, "Nx_Port not available, temporary"},
1762 {0x04, "Nx_Port not available, permament"},
1763 {0x05, "class not supported"},
1764 {0x06, "delimiter usage error"},
1765 {0x07, "TYPE not supported"},
1766 {0x08, "invalid Link_Control"},
1767 {0x09, "invalid R_CTL field"},
1768 {0x0a, "invalid F_CTL field"},
1769 {0x0b, "invalid OX_ID"},
1770 {0x0c, "invalid RX_ID"},
1771 {0x0d, "invalid SEQ_ID"},
1772 {0x0e, "invalid DF_CTL"},
1773 {0x0f, "invalid SEQ_CNT"},
1774 {0x10, "invalid parameter field"},
1775 {0x11, "exchange error"},
1776 {0x12, "protocol error"},
1777 {0x13, "incorrect length"},
1778 {0x14, "unsupported ACK"},
1779 {0x15, "class of service not supported by entity at FFFFFE"},
1780 {0x16, "login required"},
1781 {0x17, "excessive sequences attempted"},
1782 {0x18, "unable to establish exchange"},
1783 {0x1a, "fabric path not available"},
1784 {0x1b, "invalid VC_ID (class 4)"},
1785 {0x1c, "invalid CS_CTL field"},
1786 {0x1d, "insufficient resources for VC (class 4)"},
1787 {0x1f, "invalid class of service"},
1788 {0x20, "preemption request rejected"},
1789 {0x21, "preemption not enabled"},
1790 {0x22, "multicast error"},
1791 {0x23, "multicast error terminate"},
1792 {0x24, "process login required"},
1793 {0xff, "vendor specific reject"},
1794 {0, NULL},
1795 };
1796
1797 /**
1798 * zfcp_rc_description - return description for given reaon code
1799 * @code: reason code
1800 * @rc_table: table of reason codes and descriptions
1801 */
1802 static inline const char *
1803 zfcp_rc_description(u8 code, const struct zfcp_rc_entry *rc_table)
1804 {
1805 const char *descr = "unknown reason code";
1806
1807 do {
1808 if (code == rc_table->code) {
1809 descr = rc_table->description;
1810 break;
1811 }
1812 rc_table++;
1813 } while (rc_table->code && rc_table->description);
1814
1815 return descr;
1816 }
1817
1818 /**
1819 * zfcp_check_ct_response - evaluate reason code for CT_IU
1820 * @rjt: response payload to an CT_IU request
1821 * Return: 0 for accept CT_IU, 1 for reject CT_IU or invlid response code
1822 */
1823 int
1824 zfcp_check_ct_response(struct ct_hdr *rjt)
1825 {
1826 if (rjt->cmd_rsp_code == ZFCP_CT_ACCEPT)
1827 return 0;
1828
1829 if (rjt->cmd_rsp_code != ZFCP_CT_REJECT) {
1830 ZFCP_LOG_NORMAL("error: invalid Generic Service command/"
1831 "response code (0x%04hx)\n",
1832 rjt->cmd_rsp_code);
1833 return 1;
1834 }
1835
1836 ZFCP_LOG_INFO("Generic Service command rejected\n");
1837 ZFCP_LOG_INFO("%s (0x%02x, 0x%02x, 0x%02x)\n",
1838 zfcp_rc_description(rjt->reason_code, zfcp_ct_rc),
1839 (u32) rjt->reason_code, (u32) rjt->reason_code_expl,
1840 (u32) rjt->vendor_unique);
1841
1842 return 1;
1843 }
1844
1845 /**
1846 * zfcp_print_els_rjt - print reject parameter and description for ELS reject
1847 * @rjt_par: reject parameter acc. to FC-PH/FC-FS
1848 * @rc_table: table of reason codes and descriptions
1849 */
1850 static inline void
1851 zfcp_print_els_rjt(struct zfcp_ls_rjt_par *rjt_par,
1852 const struct zfcp_rc_entry *rc_table)
1853 {
1854 ZFCP_LOG_INFO("%s (%02x %02x %02x %02x)\n",
1855 zfcp_rc_description(rjt_par->reason_code, rc_table),
1856 (u32) rjt_par->action, (u32) rjt_par->reason_code,
1857 (u32) rjt_par->reason_expl, (u32) rjt_par->vendor_unique);
1858 }
1859
1860 /**
1861 * zfcp_fsf_handle_els_rjt - evaluate status qualifier/reason code on ELS reject
1862 * @sq: status qualifier word
1863 * @rjt_par: reject parameter as described in FC-PH and FC-FS
1864 * Return: -EROMTEIO for LS_RJT, -EREMCHG for invalid D_ID, -EIO else
1865 */
1866 int
1867 zfcp_handle_els_rjt(u32 sq, struct zfcp_ls_rjt_par *rjt_par)
1868 {
1869 int ret = -EIO;
1870
1871 if (sq == FSF_IOSTAT_NPORT_RJT) {
1872 ZFCP_LOG_INFO("ELS rejected (P_RJT)\n");
1873 zfcp_print_els_rjt(rjt_par, zfcp_p_rjt_rc);
1874 /* invalid d_id */
1875 if (rjt_par->reason_code == 0x01)
1876 ret = -EREMCHG;
1877 } else if (sq == FSF_IOSTAT_FABRIC_RJT) {
1878 ZFCP_LOG_INFO("ELS rejected (F_RJT)\n");
1879 zfcp_print_els_rjt(rjt_par, zfcp_p_rjt_rc);
1880 /* invalid d_id */
1881 if (rjt_par->reason_code == 0x01)
1882 ret = -EREMCHG;
1883 } else if (sq == FSF_IOSTAT_LS_RJT) {
1884 ZFCP_LOG_INFO("ELS rejected (LS_RJT)\n");
1885 zfcp_print_els_rjt(rjt_par, zfcp_ls_rjt_rc);
1886 ret = -EREMOTEIO;
1887 } else
1888 ZFCP_LOG_INFO("unexpected SQ: 0x%02x\n", sq);
1889
1890 return ret;
1891 }
1892
1893 /**
1894 * zfcp_plogi_evaluate - evaluate PLOGI playload and copy important fields
1895 * into zfcp_port structure
1896 * @port: zfcp_port structure
1897 * @plogi: plogi payload
1898 */
1899 void
1900 zfcp_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi)
1901 {
1902 port->maxframe_size = plogi->serv_param.common_serv_param[7] |
1903 ((plogi->serv_param.common_serv_param[6] & 0x0F) << 8);
1904 if (plogi->serv_param.class1_serv_param[0] & 0x80)
1905 port->supported_classes |= FC_COS_CLASS1;
1906 if (plogi->serv_param.class2_serv_param[0] & 0x80)
1907 port->supported_classes |= FC_COS_CLASS2;
1908 if (plogi->serv_param.class3_serv_param[0] & 0x80)
1909 port->supported_classes |= FC_COS_CLASS3;
1910 if (plogi->serv_param.class4_serv_param[0] & 0x80)
1911 port->supported_classes |= FC_COS_CLASS4;
1912 }
1913
1914 #undef ZFCP_LOG_AREA
hh.org GIT migration