fnic_debugfs.c

  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
 10extern int fnic_get_debug_info(struct stats_debug_info *debug_buffer,
 11							   struct fnic *fnic);
 12
 13static struct dentry *fnic_trace_debugfs_root;
 14static struct dentry *fnic_trace_debugfs_file;
 15static struct dentry *fnic_trace_enable;
 16static struct dentry *fnic_stats_debugfs_root;
 17
 18static struct dentry *fnic_fc_trace_debugfs_file;
 19static struct dentry *fnic_fc_rdata_trace_debugfs_file;
 20static struct dentry *fnic_fc_trace_enable;
 21static struct dentry *fnic_fc_trace_clear;
 22
 23struct fc_trace_flag_type {
 24	u8 fc_row_file;
 25	u8 fc_normal_file;
 26	u8 fnic_trace;
 27	u8 fc_trace;
 28	u8 fc_clear;
 29};
 30
 31static struct fc_trace_flag_type *fc_trc_flag;
 32
 33/*
 34 * fnic_debugfs_init - Initialize debugfs for fnic debug logging
 35 *
 36 * Description:
 37 * When Debugfs is configured this routine sets up the fnic debugfs
 38 * file system. If not already created, this routine will create the
 39 * fnic directory and statistics directory for trace buffer and
 40 * stats logging.
 41 */
 42int fnic_debugfs_init(void)
 43{
 44	fnic_trace_debugfs_root = debugfs_create_dir("fnic", NULL);
 45
 46	fnic_stats_debugfs_root = debugfs_create_dir("statistics",
 47						fnic_trace_debugfs_root);
 48
 49	/* Allocate memory to structure */
 50	fc_trc_flag = vmalloc(sizeof(struct fc_trace_flag_type));
 51
 52	if (fc_trc_flag) {
 53		fc_trc_flag->fc_row_file = 0;
 54		fc_trc_flag->fc_normal_file = 1;
 55		fc_trc_flag->fnic_trace = 2;
 56		fc_trc_flag->fc_trace = 3;
 57		fc_trc_flag->fc_clear = 4;
 58		return 0;
 59	}
 60
 61	return -ENOMEM;
 62}
 63
 64/*
 65 * fnic_debugfs_terminate - Tear down debugfs infrastructure
 66 *
 67 * Description:
 68 * When Debugfs is configured this routine removes debugfs file system
 69 * elements that are specific to fnic.
 70 */
 71void fnic_debugfs_terminate(void)
 72{
 73	debugfs_remove(fnic_stats_debugfs_root);
 74	fnic_stats_debugfs_root = NULL;
 75
 76	debugfs_remove(fnic_trace_debugfs_root);
 77	fnic_trace_debugfs_root = NULL;
 78
 79	vfree(fc_trc_flag);
 80}
 81
 82/*
 83 * fnic_trace_ctrl_read -
 84 *          Read  trace_enable ,fc_trace_enable
 85 *              or fc_trace_clear debugfs file
 86 * @filp: The file pointer to read from.
 87 * @ubuf: The buffer to copy the data to.
 88 * @cnt: The number of bytes to read.
 89 * @ppos: The position in the file to start reading from.
 90 *
 91 * Description:
 92 * This routine reads value of variable fnic_tracing_enabled or
 93 * fnic_fc_tracing_enabled or fnic_fc_trace_cleared
 94 * and stores into local @buf.
 95 * It will start reading file at @ppos and
 96 * copy up to @cnt of data to @ubuf from @buf.
 97 *
 98 * Returns:
 99 * This function returns the amount of data that was read.
100 */
101static ssize_t fnic_trace_ctrl_read(struct file *filp,
102				  char __user *ubuf,
103				  size_t cnt, loff_t *ppos)
104{
105	char buf[64];
106	int len;
107	u8 *trace_type;
108	len = 0;
109	trace_type = (u8 *)filp->private_data;
110	if (*trace_type == fc_trc_flag->fnic_trace)
111		len = sprintf(buf, "%d\n", fnic_tracing_enabled);
112	else if (*trace_type == fc_trc_flag->fc_trace)
113		len = sprintf(buf, "%d\n", fnic_fc_tracing_enabled);
114	else if (*trace_type == fc_trc_flag->fc_clear)
115		len = sprintf(buf, "%d\n", fnic_fc_trace_cleared);
116	else
117		pr_err("fnic: Cannot read to any debugfs file\n");
118
119	return simple_read_from_buffer(ubuf, cnt, ppos, buf, len);
120}
121
122/*
123 * fnic_trace_ctrl_write -
124 * Write to trace_enable, fc_trace_enable or
125 *         fc_trace_clear debugfs file
126 * @filp: The file pointer to write from.
127 * @ubuf: The buffer to copy the data from.
128 * @cnt: The number of bytes to write.
129 * @ppos: The position in the file to start writing to.
130 *
131 * Description:
132 * This routine writes data from user buffer @ubuf to buffer @buf and
133 * sets fc_trace_enable ,tracing_enable or fnic_fc_trace_cleared
134 * value as per user input.
135 *
136 * Returns:
137 * This function returns the amount of data that was written.
138 */
139static ssize_t fnic_trace_ctrl_write(struct file *filp,
140				  const char __user *ubuf,
141				  size_t cnt, loff_t *ppos)
142{
143	char buf[64];
144	unsigned long val;
145	int ret;
146	u8 *trace_type;
147	trace_type = (u8 *)filp->private_data;
148
149	if (cnt >= sizeof(buf))
150		return -EINVAL;
151
152	if (copy_from_user(&buf, ubuf, cnt))
153		return -EFAULT;
154
155	buf[cnt] = 0;
156
157	ret = kstrtoul(buf, 10, &val);
158	if (ret < 0)
159		return ret;
160
161	if (*trace_type == fc_trc_flag->fnic_trace)
162		fnic_tracing_enabled = val;
163	else if (*trace_type == fc_trc_flag->fc_trace)
164		fnic_fc_tracing_enabled = val;
165	else if (*trace_type == fc_trc_flag->fc_clear)
166		fnic_fc_trace_cleared = val;
167	else
168		pr_err("fnic: cannot write to any debugfs file\n");
169
170	(*ppos)++;
171
172	return cnt;
173}
174
175static const struct file_operations fnic_trace_ctrl_fops = {
176	.owner = THIS_MODULE,
177	.open = simple_open,
178	.read = fnic_trace_ctrl_read,
179	.write = fnic_trace_ctrl_write,
180};
181
182/*
183 * fnic_trace_debugfs_open - Open the fnic trace log
184 * @inode: The inode pointer
185 * @file: The file pointer to attach the log output
186 *
187 * Description:
188 * This routine is the entry point for the debugfs open file operation.
189 * It allocates the necessary buffer for the log, fills the buffer from
190 * the in-memory log and then returns a pointer to that log in
191 * the private_data field in @file.
192 *
193 * Returns:
194 * This function returns zero if successful. On error it will return
195 * a negative error value.
196 */
197static int fnic_trace_debugfs_open(struct inode *inode,
198				  struct file *file)
199{
200	fnic_dbgfs_t *fnic_dbg_prt;
201	u8 *rdata_ptr;
202	rdata_ptr = (u8 *)inode->i_private;
203	fnic_dbg_prt = kzalloc(sizeof(fnic_dbgfs_t), GFP_KERNEL);
204	if (!fnic_dbg_prt)
205		return -ENOMEM;
206
207	if (*rdata_ptr == fc_trc_flag->fnic_trace) {
208		fnic_dbg_prt->buffer = vzalloc(array3_size(3, trace_max_pages,
209							   PAGE_SIZE));
210		if (!fnic_dbg_prt->buffer) {
211			kfree(fnic_dbg_prt);
212			return -ENOMEM;
213		}
214		fnic_dbg_prt->buffer_len = fnic_get_trace_data(fnic_dbg_prt);
215	} else {
216		fnic_dbg_prt->buffer =
217			vzalloc(array3_size(3, fnic_fc_trace_max_pages,
218					    PAGE_SIZE));
219		if (!fnic_dbg_prt->buffer) {
220			kfree(fnic_dbg_prt);
221			return -ENOMEM;
222		}
223		fnic_dbg_prt->buffer_len =
224			fnic_fc_trace_get_data(fnic_dbg_prt, *rdata_ptr);
225	}
226	file->private_data = fnic_dbg_prt;
227
228	return 0;
229}
230
231/*
232 * fnic_trace_debugfs_lseek - Seek through a debugfs file
233 * @file: The file pointer to seek through.
234 * @offset: The offset to seek to or the amount to seek by.
235 * @howto: Indicates how to seek.
236 *
237 * Description:
238 * This routine is the entry point for the debugfs lseek file operation.
239 * The @howto parameter indicates whether @offset is the offset to directly
240 * seek to, or if it is a value to seek forward or reverse by. This function
241 * figures out what the new offset of the debugfs file will be and assigns
242 * that value to the f_pos field of @file.
243 *
244 * Returns:
245 * This function returns the new offset if successful and returns a negative
246 * error if unable to process the seek.
247 */
248static loff_t fnic_trace_debugfs_lseek(struct file *file,
249					loff_t offset,
250					int howto)
251{
252	fnic_dbgfs_t *fnic_dbg_prt = file->private_data;
253	return fixed_size_llseek(file, offset, howto,
254				fnic_dbg_prt->buffer_len);
255}
256
257/*
258 * fnic_trace_debugfs_read - Read a debugfs file
259 * @file: The file pointer to read from.
260 * @ubuf: The buffer to copy the data to.
261 * @nbytes: The number of bytes to read.
262 * @pos: The position in the file to start reading from.
263 *
264 * Description:
265 * This routine reads data from the buffer indicated in the private_data
266 * field of @file. It will start reading at @pos and copy up to @nbytes of
267 * data to @ubuf.
268 *
269 * Returns:
270 * This function returns the amount of data that was read (this could be
271 * less than @nbytes if the end of the file was reached).
272 */
273static ssize_t fnic_trace_debugfs_read(struct file *file,
274					char __user *ubuf,
275					size_t nbytes,
276					loff_t *pos)
277{
278	fnic_dbgfs_t *fnic_dbg_prt = file->private_data;
279	int rc = 0;
280	rc = simple_read_from_buffer(ubuf, nbytes, pos,
281				  fnic_dbg_prt->buffer,
282				  fnic_dbg_prt->buffer_len);
283	return rc;
284}
285
286/*
287 * fnic_trace_debugfs_release - Release the buffer used to store
288 * debugfs file data
289 * @inode: The inode pointer
290 * @file: The file pointer that contains the buffer to release
291 *
292 * Description:
293 * This routine frees the buffer that was allocated when the debugfs
294 * file was opened.
295 *
296 * Returns:
297 * This function returns zero.
298 */
299static int fnic_trace_debugfs_release(struct inode *inode,
300					  struct file *file)
301{
302	fnic_dbgfs_t *fnic_dbg_prt = file->private_data;
303
304	vfree(fnic_dbg_prt->buffer);
305	kfree(fnic_dbg_prt);
306	return 0;
307}
308
309static const struct file_operations fnic_trace_debugfs_fops = {
310	.owner = THIS_MODULE,
311	.open = fnic_trace_debugfs_open,
312	.llseek = fnic_trace_debugfs_lseek,
313	.read = fnic_trace_debugfs_read,
314	.release = fnic_trace_debugfs_release,
315};
316
317/*
318 * fnic_trace_debugfs_init - Initialize debugfs for fnic trace logging
319 *
320 * Description:
321 * When Debugfs is configured this routine sets up the fnic debugfs
322 * file system. If not already created, this routine will create the
323 * create file trace to log fnic trace buffer output into debugfs and
324 * it will also create file trace_enable to control enable/disable of
325 * trace logging into trace buffer.
326 */
327void fnic_trace_debugfs_init(void)
328{
329	fnic_trace_enable = debugfs_create_file("tracing_enable",
330					S_IFREG|S_IRUGO|S_IWUSR,
331					fnic_trace_debugfs_root,
332					&(fc_trc_flag->fnic_trace),
333					&fnic_trace_ctrl_fops);
334
335	fnic_trace_debugfs_file = debugfs_create_file("trace",
336					S_IFREG|S_IRUGO|S_IWUSR,
337					fnic_trace_debugfs_root,
338					&(fc_trc_flag->fnic_trace),
339					&fnic_trace_debugfs_fops);
340}
341
342/*
343 * fnic_trace_debugfs_terminate - Tear down debugfs infrastructure
344 *
345 * Description:
346 * When Debugfs is configured this routine removes debugfs file system
347 * elements that are specific to fnic trace logging.
348 */
349void fnic_trace_debugfs_terminate(void)
350{
351	debugfs_remove(fnic_trace_debugfs_file);
352	fnic_trace_debugfs_file = NULL;
353
354	debugfs_remove(fnic_trace_enable);
355	fnic_trace_enable = NULL;
356}
357
358/*
359 * fnic_fc_trace_debugfs_init -
360 * Initialize debugfs for fnic control frame trace logging
361 *
362 * Description:
363 * When Debugfs is configured this routine sets up the fnic_fc debugfs
364 * file system. If not already created, this routine will create the
365 * create file trace to log fnic fc trace buffer output into debugfs and
366 * it will also create file fc_trace_enable to control enable/disable of
367 * trace logging into trace buffer.
368 */
369
370void fnic_fc_trace_debugfs_init(void)
371{
372	fnic_fc_trace_enable = debugfs_create_file("fc_trace_enable",
373					S_IFREG|S_IRUGO|S_IWUSR,
374					fnic_trace_debugfs_root,
375					&(fc_trc_flag->fc_trace),
376					&fnic_trace_ctrl_fops);
377
378	fnic_fc_trace_clear = debugfs_create_file("fc_trace_clear",
379					S_IFREG|S_IRUGO|S_IWUSR,
380					fnic_trace_debugfs_root,
381					&(fc_trc_flag->fc_clear),
382					&fnic_trace_ctrl_fops);
383
384	fnic_fc_rdata_trace_debugfs_file =
385		debugfs_create_file("fc_trace_rdata",
386				    S_IFREG|S_IRUGO|S_IWUSR,
387				    fnic_trace_debugfs_root,
388				    &(fc_trc_flag->fc_normal_file),
389				    &fnic_trace_debugfs_fops);
390
391	fnic_fc_trace_debugfs_file =
392		debugfs_create_file("fc_trace",
393				    S_IFREG|S_IRUGO|S_IWUSR,
394				    fnic_trace_debugfs_root,
395				    &(fc_trc_flag->fc_row_file),
396				    &fnic_trace_debugfs_fops);
397}
398
399/*
400 * fnic_fc_trace_debugfs_terminate - Tear down debugfs infrastructure
401 *
402 * Description:
403 * When Debugfs is configured this routine removes debugfs file system
404 * elements that are specific to fnic_fc trace logging.
405 */
406
407void fnic_fc_trace_debugfs_terminate(void)
408{
409	debugfs_remove(fnic_fc_trace_debugfs_file);
410	fnic_fc_trace_debugfs_file = NULL;
411
412	debugfs_remove(fnic_fc_rdata_trace_debugfs_file);
413	fnic_fc_rdata_trace_debugfs_file = NULL;
414
415	debugfs_remove(fnic_fc_trace_enable);
416	fnic_fc_trace_enable = NULL;
417
418	debugfs_remove(fnic_fc_trace_clear);
419	fnic_fc_trace_clear = NULL;
420}
421
422/*
423 * fnic_reset_stats_open - Open the reset_stats file
424 * @inode: The inode pointer.
425 * @file: The file pointer to attach the stats reset flag.
426 *
427 * Description:
428 * This routine opens a debugsfs file reset_stats and stores i_private data
429 * to debug structure to retrieve later for while performing other
430 * file oprations.
431 *
432 * Returns:
433 * This function returns zero if successful.
434 */
435static int fnic_reset_stats_open(struct inode *inode, struct file *file)
436{
437	struct stats_debug_info *debug;
438
439	debug = kzalloc(sizeof(struct stats_debug_info), GFP_KERNEL);
440	if (!debug)
441		return -ENOMEM;
442
443	debug->i_private = inode->i_private;
444
445	file->private_data = debug;
446
447	return 0;
448}
449
450/*
451 * fnic_reset_stats_read - Read a reset_stats debugfs file
452 * @filp: The file pointer to read from.
453 * @ubuf: The buffer to copy the data to.
454 * @cnt: The number of bytes to read.
455 * @ppos: The position in the file to start reading from.
456 *
457 * Description:
458 * This routine reads value of variable reset_stats
459 * and stores into local @buf. It will start reading file at @ppos and
460 * copy up to @cnt of data to @ubuf from @buf.
461 *
462 * Returns:
463 * This function returns the amount of data that was read.
464 */
465static ssize_t fnic_reset_stats_read(struct file *file,
466					char __user *ubuf,
467					size_t cnt, loff_t *ppos)
468{
469	struct stats_debug_info *debug = file->private_data;
470	struct fnic *fnic = (struct fnic *)debug->i_private;
471	char buf[64];
472	int len;
473
474	len = sprintf(buf, "%u\n", fnic->reset_stats);
475
476	return simple_read_from_buffer(ubuf, cnt, ppos, buf, len);
477}
478
479/*
480 * fnic_reset_stats_write - Write to reset_stats debugfs file
481 * @filp: The file pointer to write from.
482 * @ubuf: The buffer to copy the data from.
483 * @cnt: The number of bytes to write.
484 * @ppos: The position in the file to start writing to.
485 *
486 * Description:
487 * This routine writes data from user buffer @ubuf to buffer @buf and
488 * resets cumulative stats of fnic.
489 *
490 * Returns:
491 * This function returns the amount of data that was written.
492 */
493static ssize_t fnic_reset_stats_write(struct file *file,
494					const char __user *ubuf,
495					size_t cnt, loff_t *ppos)
496{
497	struct stats_debug_info *debug = file->private_data;
498	struct fnic *fnic = (struct fnic *)debug->i_private;
499	struct fnic_stats *stats = &fnic->fnic_stats;
500	u64 *io_stats_p = (u64 *)&stats->io_stats;
501	u64 *fw_stats_p = (u64 *)&stats->fw_stats;
502	char buf[64];
503	unsigned long val;
504	int ret;
505
506	if (cnt >= sizeof(buf))
507		return -EINVAL;
508
509	if (copy_from_user(&buf, ubuf, cnt))
510		return -EFAULT;
511
512	buf[cnt] = 0;
513
514	ret = kstrtoul(buf, 10, &val);
515	if (ret < 0)
516		return ret;
517
518	fnic->reset_stats = val;
519
520	if (fnic->reset_stats) {
521		/* Skip variable is used to avoid descrepancies to Num IOs
522		 * and IO Completions stats. Skip incrementing No IO Compls
523		 * for pending active IOs after reset stats
524		 */
525		atomic64_set(&fnic->io_cmpl_skip,
526			atomic64_read(&stats->io_stats.active_ios));
527		memset(&stats->abts_stats, 0, sizeof(struct abort_stats));
528		memset(&stats->term_stats, 0,
529			sizeof(struct terminate_stats));
530		memset(&stats->reset_stats, 0, sizeof(struct reset_stats));
531		memset(&stats->misc_stats, 0, sizeof(struct misc_stats));
532		memset(&stats->vlan_stats, 0, sizeof(struct vlan_stats));
533		memset(io_stats_p+1, 0,
534			sizeof(struct io_path_stats) - sizeof(u64));
535		memset(fw_stats_p+1, 0,
536			sizeof(struct fw_stats) - sizeof(u64));
537		ktime_get_real_ts64(&stats->stats_timestamps.last_reset_time);
538	}
539
540	(*ppos)++;
541	return cnt;
542}
543
544/*
545 * fnic_reset_stats_release - Release the buffer used to store
546 * debugfs file data
547 * @inode: The inode pointer
548 * @file: The file pointer that contains the buffer to release
549 *
550 * Description:
551 * This routine frees the buffer that was allocated when the debugfs
552 * file was opened.
553 *
554 * Returns:
555 * This function returns zero.
556 */
557static int fnic_reset_stats_release(struct inode *inode,
558					struct file *file)
559{
560	struct stats_debug_info *debug = file->private_data;
561	kfree(debug);
562	return 0;
563}
564
565/*
566 * fnic_stats_debugfs_open - Open the stats file for specific host
567 * and get fnic stats.
568 * @inode: The inode pointer.
569 * @file: The file pointer to attach the specific host statistics.
570 *
571 * Description:
572 * This routine opens a debugsfs file stats of specific host and print
573 * fnic stats.
574 *
575 * Returns:
576 * This function returns zero if successful.
577 */
578static int fnic_stats_debugfs_open(struct inode *inode,
579					struct file *file)
580{
581	struct fnic *fnic = inode->i_private;
582	struct fnic_stats *fnic_stats = &fnic->fnic_stats;
583	struct stats_debug_info *debug;
584	int buf_size = 2 * PAGE_SIZE;
585
586	debug = kzalloc(sizeof(struct stats_debug_info), GFP_KERNEL);
587	if (!debug)
588		return -ENOMEM;
589
590	debug->debug_buffer = vmalloc(buf_size);
591	if (!debug->debug_buffer) {
592		kfree(debug);
593		return -ENOMEM;
594	}
595
596	debug->buf_size = buf_size;
597	memset((void *)debug->debug_buffer, 0, buf_size);
598	debug->buffer_len = fnic_get_stats_data(debug, fnic_stats);
599	debug->buffer_len += fnic_get_debug_info(debug, fnic);
600
601	file->private_data = debug;
602
603	return 0;
604}
605
606/*
607 * fnic_stats_debugfs_read - Read a debugfs file
608 * @file: The file pointer to read from.
609 * @ubuf: The buffer to copy the data to.
610 * @nbytes: The number of bytes to read.
611 * @pos: The position in the file to start reading from.
612 *
613 * Description:
614 * This routine reads data from the buffer indicated in the private_data
615 * field of @file. It will start reading at @pos and copy up to @nbytes of
616 * data to @ubuf.
617 *
618 * Returns:
619 * This function returns the amount of data that was read (this could be
620 * less than @nbytes if the end of the file was reached).
621 */
622static ssize_t fnic_stats_debugfs_read(struct file *file,
623					char __user *ubuf,
624					size_t nbytes,
625					loff_t *pos)
626{
627	struct stats_debug_info *debug = file->private_data;
628	int rc = 0;
629	rc = simple_read_from_buffer(ubuf, nbytes, pos,
630					debug->debug_buffer,
631					debug->buffer_len);
632	return rc;
633}
634
635/*
636 * fnic_stats_stats_release - Release the buffer used to store
637 * debugfs file data
638 * @inode: The inode pointer
639 * @file: The file pointer that contains the buffer to release
640 *
641 * Description:
642 * This routine frees the buffer that was allocated when the debugfs
643 * file was opened.
644 *
645 * Returns:
646 * This function returns zero.
647 */
648static int fnic_stats_debugfs_release(struct inode *inode,
649					struct file *file)
650{
651	struct stats_debug_info *debug = file->private_data;
652	vfree(debug->debug_buffer);
653	kfree(debug);
654	return 0;
655}
656
657static const struct file_operations fnic_stats_debugfs_fops = {
658	.owner = THIS_MODULE,
659	.open = fnic_stats_debugfs_open,
660	.read = fnic_stats_debugfs_read,
661	.release = fnic_stats_debugfs_release,
662};
663
664static const struct file_operations fnic_reset_debugfs_fops = {
665	.owner = THIS_MODULE,
666	.open = fnic_reset_stats_open,
667	.read = fnic_reset_stats_read,
668	.write = fnic_reset_stats_write,
669	.release = fnic_reset_stats_release,
670};
671
672/*
673 * fnic_stats_init - Initialize stats struct and create stats file per fnic
674 *
675 * Description:
676 * When Debugfs is configured this routine sets up the stats file per fnic
677 * It will create file stats and reset_stats under statistics/host# directory
678 * to log per fnic stats.
679 */
680int fnic_stats_debugfs_init(struct fnic *fnic)
681{
682	char name[16];
683
684	snprintf(name, sizeof(name), "host%d", fnic->host->host_no);
685
686	fnic->fnic_stats_debugfs_host = debugfs_create_dir(name,
687						fnic_stats_debugfs_root);
688	fnic->fnic_stats_debugfs_file = debugfs_create_file("stats",
689						S_IFREG|S_IRUGO|S_IWUSR,
690						fnic->fnic_stats_debugfs_host,
691						fnic,
692						&fnic_stats_debugfs_fops);
693	fnic->fnic_reset_debugfs_file = debugfs_create_file("reset_stats",
694						S_IFREG|S_IRUGO|S_IWUSR,
695						fnic->fnic_stats_debugfs_host,
696						fnic,
697						&fnic_reset_debugfs_fops);
698	return 0;
699}
700
701/*
702 * fnic_stats_debugfs_remove - Tear down debugfs infrastructure of stats
703 *
704 * Description:
705 * When Debugfs is configured this routine removes debugfs file system
706 * elements that are specific to fnic stats.
707 */
708void fnic_stats_debugfs_remove(struct fnic *fnic)
709{
710	if (!fnic)
711		return;
712
713	debugfs_remove(fnic->fnic_stats_debugfs_file);
714	fnic->fnic_stats_debugfs_file = NULL;
715
716	debugfs_remove(fnic->fnic_reset_debugfs_file);
717	fnic->fnic_reset_debugfs_file = NULL;
718
719	debugfs_remove(fnic->fnic_stats_debugfs_host);
720	fnic->fnic_stats_debugfs_host = NULL;
721}