1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright 2012 Cisco Systems, Inc. All rights reserved.
3
4 #include <linux/module.h>
5 #include <linux/errno.h>
6 #include <linux/debugfs.h>
7 #include <linux/vmalloc.h>
8 #include "fnic.h"
9
10 static struct dentry *fnic_trace_debugfs_root;
11 static struct dentry *fnic_trace_debugfs_file;
12 static struct dentry *fnic_trace_enable;
13 static struct dentry *fnic_stats_debugfs_root;
14
15 static struct dentry *fnic_fc_trace_debugfs_file;
16 static struct dentry *fnic_fc_rdata_trace_debugfs_file;
17 static struct dentry *fnic_fc_trace_enable;
18 static struct dentry *fnic_fc_trace_clear;
19
20 struct fc_trace_flag_type {
21 u8 fc_row_file;
22 u8 fc_normal_file;
23 u8 fnic_trace;
24 u8 fc_trace;
25 u8 fc_clear;
26 };
27
28 static struct fc_trace_flag_type *fc_trc_flag;
29
30 /*
31 * fnic_debugfs_init - Initialize debugfs for fnic debug logging
32 *
33 * Description:
34 * When Debugfs is configured this routine sets up the fnic debugfs
35 * file system. If not already created, this routine will create the
36 * fnic directory and statistics directory for trace buffer and
37 * stats logging.
38 */
fnic_debugfs_init(void)39 int fnic_debugfs_init(void)
40 {
41 fnic_trace_debugfs_root = debugfs_create_dir("fnic", NULL);
42
43 fnic_stats_debugfs_root = debugfs_create_dir("statistics",
44 fnic_trace_debugfs_root);
45
46 /* Allocate memory to structure */
47 fc_trc_flag = vmalloc(sizeof(struct fc_trace_flag_type));
48
49 if (fc_trc_flag) {
50 fc_trc_flag->fc_row_file = 0;
51 fc_trc_flag->fc_normal_file = 1;
52 fc_trc_flag->fnic_trace = 2;
53 fc_trc_flag->fc_trace = 3;
54 fc_trc_flag->fc_clear = 4;
55 }
56
57 return 0;
58 }
59
60 /*
61 * fnic_debugfs_terminate - Tear down debugfs infrastructure
62 *
63 * Description:
64 * When Debugfs is configured this routine removes debugfs file system
65 * elements that are specific to fnic.
66 */
fnic_debugfs_terminate(void)67 void fnic_debugfs_terminate(void)
68 {
69 debugfs_remove(fnic_stats_debugfs_root);
70 fnic_stats_debugfs_root = NULL;
71
72 debugfs_remove(fnic_trace_debugfs_root);
73 fnic_trace_debugfs_root = NULL;
74
75 vfree(fc_trc_flag);
76 }
77
78 /*
79 * fnic_trace_ctrl_read -
80 * Read trace_enable ,fc_trace_enable
81 * or fc_trace_clear debugfs file
82 * @filp: The file pointer to read from.
83 * @ubuf: The buffer to copy the data to.
84 * @cnt: The number of bytes to read.
85 * @ppos: The position in the file to start reading from.
86 *
87 * Description:
88 * This routine reads value of variable fnic_tracing_enabled or
89 * fnic_fc_tracing_enabled or fnic_fc_trace_cleared
90 * and stores into local @buf.
91 * It will start reading file at @ppos and
92 * copy up to @cnt of data to @ubuf from @buf.
93 *
94 * Returns:
95 * This function returns the amount of data that was read.
96 */
fnic_trace_ctrl_read(struct file * filp,char __user * ubuf,size_t cnt,loff_t * ppos)97 static ssize_t fnic_trace_ctrl_read(struct file *filp,
98 char __user *ubuf,
99 size_t cnt, loff_t *ppos)
100 {
101 char buf[64];
102 int len;
103 u8 *trace_type;
104 len = 0;
105 trace_type = (u8 *)filp->private_data;
106 if (*trace_type == fc_trc_flag->fnic_trace)
107 len = sprintf(buf, "%d\n", fnic_tracing_enabled);
108 else if (*trace_type == fc_trc_flag->fc_trace)
109 len = sprintf(buf, "%d\n", fnic_fc_tracing_enabled);
110 else if (*trace_type == fc_trc_flag->fc_clear)
111 len = sprintf(buf, "%d\n", fnic_fc_trace_cleared);
112 else
113 pr_err("fnic: Cannot read to any debugfs file\n");
114
115 return simple_read_from_buffer(ubuf, cnt, ppos, buf, len);
116 }
117
118 /*
119 * fnic_trace_ctrl_write -
120 * Write to trace_enable, fc_trace_enable or
121 * fc_trace_clear debugfs file
122 * @filp: The file pointer to write from.
123 * @ubuf: The buffer to copy the data from.
124 * @cnt: The number of bytes to write.
125 * @ppos: The position in the file to start writing to.
126 *
127 * Description:
128 * This routine writes data from user buffer @ubuf to buffer @buf and
129 * sets fc_trace_enable ,tracing_enable or fnic_fc_trace_cleared
130 * value as per user input.
131 *
132 * Returns:
133 * This function returns the amount of data that was written.
134 */
fnic_trace_ctrl_write(struct file * filp,const char __user * ubuf,size_t cnt,loff_t * ppos)135 static ssize_t fnic_trace_ctrl_write(struct file *filp,
136 const char __user *ubuf,
137 size_t cnt, loff_t *ppos)
138 {
139 char buf[64];
140 unsigned long val;
141 int ret;
142 u8 *trace_type;
143 trace_type = (u8 *)filp->private_data;
144
145 if (cnt >= sizeof(buf))
146 return -EINVAL;
147
148 if (copy_from_user(&buf, ubuf, cnt))
149 return -EFAULT;
150
151 buf[cnt] = 0;
152
153 ret = kstrtoul(buf, 10, &val);
154 if (ret < 0)
155 return ret;
156
157 if (*trace_type == fc_trc_flag->fnic_trace)
158 fnic_tracing_enabled = val;
159 else if (*trace_type == fc_trc_flag->fc_trace)
160 fnic_fc_tracing_enabled = val;
161 else if (*trace_type == fc_trc_flag->fc_clear)
162 fnic_fc_trace_cleared = val;
163 else
164 pr_err("fnic: cannot write to any debugfs file\n");
165
166 (*ppos)++;
167
168 return cnt;
169 }
170
171 static const struct file_operations fnic_trace_ctrl_fops = {
172 .owner = THIS_MODULE,
173 .open = simple_open,
174 .read = fnic_trace_ctrl_read,
175 .write = fnic_trace_ctrl_write,
176 };
177
178 /*
179 * fnic_trace_debugfs_open - Open the fnic trace log
180 * @inode: The inode pointer
181 * @file: The file pointer to attach the log output
182 *
183 * Description:
184 * This routine is the entry point for the debugfs open file operation.
185 * It allocates the necessary buffer for the log, fills the buffer from
186 * the in-memory log and then returns a pointer to that log in
187 * the private_data field in @file.
188 *
189 * Returns:
190 * This function returns zero if successful. On error it will return
191 * a negative error value.
192 */
fnic_trace_debugfs_open(struct inode * inode,struct file * file)193 static int fnic_trace_debugfs_open(struct inode *inode,
194 struct file *file)
195 {
196 fnic_dbgfs_t *fnic_dbg_prt;
197 u8 *rdata_ptr;
198 rdata_ptr = (u8 *)inode->i_private;
199 fnic_dbg_prt = kzalloc(sizeof(fnic_dbgfs_t), GFP_KERNEL);
200 if (!fnic_dbg_prt)
201 return -ENOMEM;
202
203 if (*rdata_ptr == fc_trc_flag->fnic_trace) {
204 fnic_dbg_prt->buffer = vzalloc(array3_size(3, trace_max_pages,
205 PAGE_SIZE));
206 if (!fnic_dbg_prt->buffer) {
207 kfree(fnic_dbg_prt);
208 return -ENOMEM;
209 }
210 fnic_dbg_prt->buffer_len = fnic_get_trace_data(fnic_dbg_prt);
211 } else {
212 fnic_dbg_prt->buffer =
213 vzalloc(array3_size(3, fnic_fc_trace_max_pages,
214 PAGE_SIZE));
215 if (!fnic_dbg_prt->buffer) {
216 kfree(fnic_dbg_prt);
217 return -ENOMEM;
218 }
219 fnic_dbg_prt->buffer_len =
220 fnic_fc_trace_get_data(fnic_dbg_prt, *rdata_ptr);
221 }
222 file->private_data = fnic_dbg_prt;
223
224 return 0;
225 }
226
227 /*
228 * fnic_trace_debugfs_lseek - Seek through a debugfs file
229 * @file: The file pointer to seek through.
230 * @offset: The offset to seek to or the amount to seek by.
231 * @howto: Indicates how to seek.
232 *
233 * Description:
234 * This routine is the entry point for the debugfs lseek file operation.
235 * The @howto parameter indicates whether @offset is the offset to directly
236 * seek to, or if it is a value to seek forward or reverse by. This function
237 * figures out what the new offset of the debugfs file will be and assigns
238 * that value to the f_pos field of @file.
239 *
240 * Returns:
241 * This function returns the new offset if successful and returns a negative
242 * error if unable to process the seek.
243 */
fnic_trace_debugfs_lseek(struct file * file,loff_t offset,int howto)244 static loff_t fnic_trace_debugfs_lseek(struct file *file,
245 loff_t offset,
246 int howto)
247 {
248 fnic_dbgfs_t *fnic_dbg_prt = file->private_data;
249 return fixed_size_llseek(file, offset, howto,
250 fnic_dbg_prt->buffer_len);
251 }
252
253 /*
254 * fnic_trace_debugfs_read - Read a debugfs file
255 * @file: The file pointer to read from.
256 * @ubuf: The buffer to copy the data to.
257 * @nbytes: The number of bytes to read.
258 * @pos: The position in the file to start reading from.
259 *
260 * Description:
261 * This routine reads data from the buffer indicated in the private_data
262 * field of @file. It will start reading at @pos and copy up to @nbytes of
263 * data to @ubuf.
264 *
265 * Returns:
266 * This function returns the amount of data that was read (this could be
267 * less than @nbytes if the end of the file was reached).
268 */
fnic_trace_debugfs_read(struct file * file,char __user * ubuf,size_t nbytes,loff_t * pos)269 static ssize_t fnic_trace_debugfs_read(struct file *file,
270 char __user *ubuf,
271 size_t nbytes,
272 loff_t *pos)
273 {
274 fnic_dbgfs_t *fnic_dbg_prt = file->private_data;
275 int rc = 0;
276 rc = simple_read_from_buffer(ubuf, nbytes, pos,
277 fnic_dbg_prt->buffer,
278 fnic_dbg_prt->buffer_len);
279 return rc;
280 }
281
282 /*
283 * fnic_trace_debugfs_release - Release the buffer used to store
284 * debugfs file data
285 * @inode: The inode pointer
286 * @file: The file pointer that contains the buffer to release
287 *
288 * Description:
289 * This routine frees the buffer that was allocated when the debugfs
290 * file was opened.
291 *
292 * Returns:
293 * This function returns zero.
294 */
fnic_trace_debugfs_release(struct inode * inode,struct file * file)295 static int fnic_trace_debugfs_release(struct inode *inode,
296 struct file *file)
297 {
298 fnic_dbgfs_t *fnic_dbg_prt = file->private_data;
299
300 vfree(fnic_dbg_prt->buffer);
301 kfree(fnic_dbg_prt);
302 return 0;
303 }
304
305 static const struct file_operations fnic_trace_debugfs_fops = {
306 .owner = THIS_MODULE,
307 .open = fnic_trace_debugfs_open,
308 .llseek = fnic_trace_debugfs_lseek,
309 .read = fnic_trace_debugfs_read,
310 .release = fnic_trace_debugfs_release,
311 };
312
313 /*
314 * fnic_trace_debugfs_init - Initialize debugfs for fnic trace logging
315 *
316 * Description:
317 * When Debugfs is configured this routine sets up the fnic debugfs
318 * file system. If not already created, this routine will create the
319 * create file trace to log fnic trace buffer output into debugfs and
320 * it will also create file trace_enable to control enable/disable of
321 * trace logging into trace buffer.
322 */
fnic_trace_debugfs_init(void)323 void fnic_trace_debugfs_init(void)
324 {
325 fnic_trace_enable = debugfs_create_file("tracing_enable",
326 S_IFREG|S_IRUGO|S_IWUSR,
327 fnic_trace_debugfs_root,
328 &(fc_trc_flag->fnic_trace),
329 &fnic_trace_ctrl_fops);
330
331 fnic_trace_debugfs_file = debugfs_create_file("trace",
332 S_IFREG|S_IRUGO|S_IWUSR,
333 fnic_trace_debugfs_root,
334 &(fc_trc_flag->fnic_trace),
335 &fnic_trace_debugfs_fops);
336 }
337
338 /*
339 * fnic_trace_debugfs_terminate - Tear down debugfs infrastructure
340 *
341 * Description:
342 * When Debugfs is configured this routine removes debugfs file system
343 * elements that are specific to fnic trace logging.
344 */
fnic_trace_debugfs_terminate(void)345 void fnic_trace_debugfs_terminate(void)
346 {
347 debugfs_remove(fnic_trace_debugfs_file);
348 fnic_trace_debugfs_file = NULL;
349
350 debugfs_remove(fnic_trace_enable);
351 fnic_trace_enable = NULL;
352 }
353
354 /*
355 * fnic_fc_trace_debugfs_init -
356 * Initialize debugfs for fnic control frame trace logging
357 *
358 * Description:
359 * When Debugfs is configured this routine sets up the fnic_fc debugfs
360 * file system. If not already created, this routine will create the
361 * create file trace to log fnic fc trace buffer output into debugfs and
362 * it will also create file fc_trace_enable to control enable/disable of
363 * trace logging into trace buffer.
364 */
365
fnic_fc_trace_debugfs_init(void)366 void fnic_fc_trace_debugfs_init(void)
367 {
368 fnic_fc_trace_enable = debugfs_create_file("fc_trace_enable",
369 S_IFREG|S_IRUGO|S_IWUSR,
370 fnic_trace_debugfs_root,
371 &(fc_trc_flag->fc_trace),
372 &fnic_trace_ctrl_fops);
373
374 fnic_fc_trace_clear = debugfs_create_file("fc_trace_clear",
375 S_IFREG|S_IRUGO|S_IWUSR,
376 fnic_trace_debugfs_root,
377 &(fc_trc_flag->fc_clear),
378 &fnic_trace_ctrl_fops);
379
380 fnic_fc_rdata_trace_debugfs_file =
381 debugfs_create_file("fc_trace_rdata",
382 S_IFREG|S_IRUGO|S_IWUSR,
383 fnic_trace_debugfs_root,
384 &(fc_trc_flag->fc_normal_file),
385 &fnic_trace_debugfs_fops);
386
387 fnic_fc_trace_debugfs_file =
388 debugfs_create_file("fc_trace",
389 S_IFREG|S_IRUGO|S_IWUSR,
390 fnic_trace_debugfs_root,
391 &(fc_trc_flag->fc_row_file),
392 &fnic_trace_debugfs_fops);
393 }
394
395 /*
396 * fnic_fc_trace_debugfs_terminate - Tear down debugfs infrastructure
397 *
398 * Description:
399 * When Debugfs is configured this routine removes debugfs file system
400 * elements that are specific to fnic_fc trace logging.
401 */
402
fnic_fc_trace_debugfs_terminate(void)403 void fnic_fc_trace_debugfs_terminate(void)
404 {
405 debugfs_remove(fnic_fc_trace_debugfs_file);
406 fnic_fc_trace_debugfs_file = NULL;
407
408 debugfs_remove(fnic_fc_rdata_trace_debugfs_file);
409 fnic_fc_rdata_trace_debugfs_file = NULL;
410
411 debugfs_remove(fnic_fc_trace_enable);
412 fnic_fc_trace_enable = NULL;
413
414 debugfs_remove(fnic_fc_trace_clear);
415 fnic_fc_trace_clear = NULL;
416 }
417
418 /*
419 * fnic_reset_stats_open - Open the reset_stats file
420 * @inode: The inode pointer.
421 * @file: The file pointer to attach the stats reset flag.
422 *
423 * Description:
424 * This routine opens a debugsfs file reset_stats and stores i_private data
425 * to debug structure to retrieve later for while performing other
426 * file oprations.
427 *
428 * Returns:
429 * This function returns zero if successful.
430 */
fnic_reset_stats_open(struct inode * inode,struct file * file)431 static int fnic_reset_stats_open(struct inode *inode, struct file *file)
432 {
433 struct stats_debug_info *debug;
434
435 debug = kzalloc(sizeof(struct stats_debug_info), GFP_KERNEL);
436 if (!debug)
437 return -ENOMEM;
438
439 debug->i_private = inode->i_private;
440
441 file->private_data = debug;
442
443 return 0;
444 }
445
446 /*
447 * fnic_reset_stats_read - Read a reset_stats debugfs file
448 * @filp: The file pointer to read from.
449 * @ubuf: The buffer to copy the data to.
450 * @cnt: The number of bytes to read.
451 * @ppos: The position in the file to start reading from.
452 *
453 * Description:
454 * This routine reads value of variable reset_stats
455 * and stores into local @buf. It will start reading file at @ppos and
456 * copy up to @cnt of data to @ubuf from @buf.
457 *
458 * Returns:
459 * This function returns the amount of data that was read.
460 */
fnic_reset_stats_read(struct file * file,char __user * ubuf,size_t cnt,loff_t * ppos)461 static ssize_t fnic_reset_stats_read(struct file *file,
462 char __user *ubuf,
463 size_t cnt, loff_t *ppos)
464 {
465 struct stats_debug_info *debug = file->private_data;
466 struct fnic *fnic = (struct fnic *)debug->i_private;
467 char buf[64];
468 int len;
469
470 len = sprintf(buf, "%u\n", fnic->reset_stats);
471
472 return simple_read_from_buffer(ubuf, cnt, ppos, buf, len);
473 }
474
475 /*
476 * fnic_reset_stats_write - Write to reset_stats debugfs file
477 * @filp: The file pointer to write from.
478 * @ubuf: The buffer to copy the data from.
479 * @cnt: The number of bytes to write.
480 * @ppos: The position in the file to start writing to.
481 *
482 * Description:
483 * This routine writes data from user buffer @ubuf to buffer @buf and
484 * resets cumulative stats of fnic.
485 *
486 * Returns:
487 * This function returns the amount of data that was written.
488 */
fnic_reset_stats_write(struct file * file,const char __user * ubuf,size_t cnt,loff_t * ppos)489 static ssize_t fnic_reset_stats_write(struct file *file,
490 const char __user *ubuf,
491 size_t cnt, loff_t *ppos)
492 {
493 struct stats_debug_info *debug = file->private_data;
494 struct fnic *fnic = (struct fnic *)debug->i_private;
495 struct fnic_stats *stats = &fnic->fnic_stats;
496 u64 *io_stats_p = (u64 *)&stats->io_stats;
497 u64 *fw_stats_p = (u64 *)&stats->fw_stats;
498 char buf[64];
499 unsigned long val;
500 int ret;
501
502 if (cnt >= sizeof(buf))
503 return -EINVAL;
504
505 if (copy_from_user(&buf, ubuf, cnt))
506 return -EFAULT;
507
508 buf[cnt] = 0;
509
510 ret = kstrtoul(buf, 10, &val);
511 if (ret < 0)
512 return ret;
513
514 fnic->reset_stats = val;
515
516 if (fnic->reset_stats) {
517 /* Skip variable is used to avoid descrepancies to Num IOs
518 * and IO Completions stats. Skip incrementing No IO Compls
519 * for pending active IOs after reset stats
520 */
521 atomic64_set(&fnic->io_cmpl_skip,
522 atomic64_read(&stats->io_stats.active_ios));
523 memset(&stats->abts_stats, 0, sizeof(struct abort_stats));
524 memset(&stats->term_stats, 0,
525 sizeof(struct terminate_stats));
526 memset(&stats->reset_stats, 0, sizeof(struct reset_stats));
527 memset(&stats->misc_stats, 0, sizeof(struct misc_stats));
528 memset(&stats->vlan_stats, 0, sizeof(struct vlan_stats));
529 memset(io_stats_p+1, 0,
530 sizeof(struct io_path_stats) - sizeof(u64));
531 memset(fw_stats_p+1, 0,
532 sizeof(struct fw_stats) - sizeof(u64));
533 ktime_get_real_ts64(&stats->stats_timestamps.last_reset_time);
534 }
535
536 (*ppos)++;
537 return cnt;
538 }
539
540 /*
541 * fnic_reset_stats_release - Release the buffer used to store
542 * debugfs file data
543 * @inode: The inode pointer
544 * @file: The file pointer that contains the buffer to release
545 *
546 * Description:
547 * This routine frees the buffer that was allocated when the debugfs
548 * file was opened.
549 *
550 * Returns:
551 * This function returns zero.
552 */
fnic_reset_stats_release(struct inode * inode,struct file * file)553 static int fnic_reset_stats_release(struct inode *inode,
554 struct file *file)
555 {
556 struct stats_debug_info *debug = file->private_data;
557 kfree(debug);
558 return 0;
559 }
560
561 /*
562 * fnic_stats_debugfs_open - Open the stats file for specific host
563 * and get fnic stats.
564 * @inode: The inode pointer.
565 * @file: The file pointer to attach the specific host statistics.
566 *
567 * Description:
568 * This routine opens a debugsfs file stats of specific host and print
569 * fnic stats.
570 *
571 * Returns:
572 * This function returns zero if successful.
573 */
fnic_stats_debugfs_open(struct inode * inode,struct file * file)574 static int fnic_stats_debugfs_open(struct inode *inode,
575 struct file *file)
576 {
577 struct fnic *fnic = inode->i_private;
578 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
579 struct stats_debug_info *debug;
580 int buf_size = 2 * PAGE_SIZE;
581
582 debug = kzalloc(sizeof(struct stats_debug_info), GFP_KERNEL);
583 if (!debug)
584 return -ENOMEM;
585
586 debug->debug_buffer = vmalloc(buf_size);
587 if (!debug->debug_buffer) {
588 kfree(debug);
589 return -ENOMEM;
590 }
591
592 debug->buf_size = buf_size;
593 memset((void *)debug->debug_buffer, 0, buf_size);
594 debug->buffer_len = fnic_get_stats_data(debug, fnic_stats);
595
596 file->private_data = debug;
597
598 return 0;
599 }
600
601 /*
602 * fnic_stats_debugfs_read - Read a debugfs file
603 * @file: The file pointer to read from.
604 * @ubuf: The buffer to copy the data to.
605 * @nbytes: The number of bytes to read.
606 * @pos: The position in the file to start reading from.
607 *
608 * Description:
609 * This routine reads data from the buffer indicated in the private_data
610 * field of @file. It will start reading at @pos and copy up to @nbytes of
611 * data to @ubuf.
612 *
613 * Returns:
614 * This function returns the amount of data that was read (this could be
615 * less than @nbytes if the end of the file was reached).
616 */
fnic_stats_debugfs_read(struct file * file,char __user * ubuf,size_t nbytes,loff_t * pos)617 static ssize_t fnic_stats_debugfs_read(struct file *file,
618 char __user *ubuf,
619 size_t nbytes,
620 loff_t *pos)
621 {
622 struct stats_debug_info *debug = file->private_data;
623 int rc = 0;
624 rc = simple_read_from_buffer(ubuf, nbytes, pos,
625 debug->debug_buffer,
626 debug->buffer_len);
627 return rc;
628 }
629
630 /*
631 * fnic_stats_stats_release - Release the buffer used to store
632 * debugfs file data
633 * @inode: The inode pointer
634 * @file: The file pointer that contains the buffer to release
635 *
636 * Description:
637 * This routine frees the buffer that was allocated when the debugfs
638 * file was opened.
639 *
640 * Returns:
641 * This function returns zero.
642 */
fnic_stats_debugfs_release(struct inode * inode,struct file * file)643 static int fnic_stats_debugfs_release(struct inode *inode,
644 struct file *file)
645 {
646 struct stats_debug_info *debug = file->private_data;
647 vfree(debug->debug_buffer);
648 kfree(debug);
649 return 0;
650 }
651
652 static const struct file_operations fnic_stats_debugfs_fops = {
653 .owner = THIS_MODULE,
654 .open = fnic_stats_debugfs_open,
655 .read = fnic_stats_debugfs_read,
656 .release = fnic_stats_debugfs_release,
657 };
658
659 static const struct file_operations fnic_reset_debugfs_fops = {
660 .owner = THIS_MODULE,
661 .open = fnic_reset_stats_open,
662 .read = fnic_reset_stats_read,
663 .write = fnic_reset_stats_write,
664 .release = fnic_reset_stats_release,
665 };
666
667 /*
668 * fnic_stats_init - Initialize stats struct and create stats file per fnic
669 *
670 * Description:
671 * When Debugfs is configured this routine sets up the stats file per fnic
672 * It will create file stats and reset_stats under statistics/host# directory
673 * to log per fnic stats.
674 */
fnic_stats_debugfs_init(struct fnic * fnic)675 void fnic_stats_debugfs_init(struct fnic *fnic)
676 {
677 char name[16];
678
679 snprintf(name, sizeof(name), "host%d", fnic->lport->host->host_no);
680
681 fnic->fnic_stats_debugfs_host = debugfs_create_dir(name,
682 fnic_stats_debugfs_root);
683
684 fnic->fnic_stats_debugfs_file = debugfs_create_file("stats",
685 S_IFREG|S_IRUGO|S_IWUSR,
686 fnic->fnic_stats_debugfs_host,
687 fnic,
688 &fnic_stats_debugfs_fops);
689
690 fnic->fnic_reset_debugfs_file = debugfs_create_file("reset_stats",
691 S_IFREG|S_IRUGO|S_IWUSR,
692 fnic->fnic_stats_debugfs_host,
693 fnic,
694 &fnic_reset_debugfs_fops);
695 }
696
697 /*
698 * fnic_stats_debugfs_remove - Tear down debugfs infrastructure of stats
699 *
700 * Description:
701 * When Debugfs is configured this routine removes debugfs file system
702 * elements that are specific to fnic stats.
703 */
fnic_stats_debugfs_remove(struct fnic * fnic)704 void fnic_stats_debugfs_remove(struct fnic *fnic)
705 {
706 if (!fnic)
707 return;
708
709 debugfs_remove(fnic->fnic_stats_debugfs_file);
710 fnic->fnic_stats_debugfs_file = NULL;
711
712 debugfs_remove(fnic->fnic_reset_debugfs_file);
713 fnic->fnic_reset_debugfs_file = NULL;
714
715 debugfs_remove(fnic->fnic_stats_debugfs_host);
716 fnic->fnic_stats_debugfs_host = NULL;
717 }
718
