Commit | Line | Data |
---|---|---|
4d7007b4 HP |
1 | /* |
2 | * Copyright 2012 Cisco Systems, Inc. All rights reserved. | |
3 | * | |
4 | * This program is free software; you may redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; version 2 of the License. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
9 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
10 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
11 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
12 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
13 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
14 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
15 | * SOFTWARE. | |
16 | */ | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <linux/errno.h> | |
20 | #include <linux/debugfs.h> | |
d6472302 | 21 | #include <linux/vmalloc.h> |
4d7007b4 HP |
22 | #include "fnic.h" |
23 | ||
24 | static struct dentry *fnic_trace_debugfs_root; | |
25 | static struct dentry *fnic_trace_debugfs_file; | |
26 | static struct dentry *fnic_trace_enable; | |
67125b02 HP |
27 | static struct dentry *fnic_stats_debugfs_root; |
28 | ||
abb14148 HS |
29 | static struct dentry *fnic_fc_trace_debugfs_file; |
30 | static struct dentry *fnic_fc_rdata_trace_debugfs_file; | |
31 | static struct dentry *fnic_fc_trace_enable; | |
32 | static struct dentry *fnic_fc_trace_clear; | |
33 | ||
34 | struct fc_trace_flag_type { | |
35 | u8 fc_row_file; | |
36 | u8 fc_normal_file; | |
37 | u8 fnic_trace; | |
38 | u8 fc_trace; | |
39 | u8 fc_clear; | |
40 | }; | |
41 | ||
42 | static struct fc_trace_flag_type *fc_trc_flag; | |
43 | ||
67125b02 HP |
44 | /* |
45 | * fnic_debugfs_init - Initialize debugfs for fnic debug logging | |
46 | * | |
47 | * Description: | |
48 | * When Debugfs is configured this routine sets up the fnic debugfs | |
49 | * file system. If not already created, this routine will create the | |
50 | * fnic directory and statistics directory for trace buffer and | |
51 | * stats logging. | |
52 | */ | |
53 | int fnic_debugfs_init(void) | |
54 | { | |
55 | int rc = -1; | |
56 | fnic_trace_debugfs_root = debugfs_create_dir("fnic", NULL); | |
67125b02 HP |
57 | |
58 | fnic_stats_debugfs_root = debugfs_create_dir("statistics", | |
59 | fnic_trace_debugfs_root); | |
67125b02 | 60 | |
abb14148 HS |
61 | /* Allocate memory to structure */ |
62 | fc_trc_flag = (struct fc_trace_flag_type *) | |
63 | vmalloc(sizeof(struct fc_trace_flag_type)); | |
64 | ||
65 | if (fc_trc_flag) { | |
66 | fc_trc_flag->fc_row_file = 0; | |
67 | fc_trc_flag->fc_normal_file = 1; | |
68 | fc_trc_flag->fnic_trace = 2; | |
69 | fc_trc_flag->fc_trace = 3; | |
70 | fc_trc_flag->fc_clear = 4; | |
71 | } | |
72 | ||
67125b02 HP |
73 | rc = 0; |
74 | return rc; | |
75 | } | |
76 | ||
77 | /* | |
78 | * fnic_debugfs_terminate - Tear down debugfs infrastructure | |
79 | * | |
80 | * Description: | |
81 | * When Debugfs is configured this routine removes debugfs file system | |
82 | * elements that are specific to fnic. | |
83 | */ | |
84 | void fnic_debugfs_terminate(void) | |
85 | { | |
86 | debugfs_remove(fnic_stats_debugfs_root); | |
87 | fnic_stats_debugfs_root = NULL; | |
88 | ||
89 | debugfs_remove(fnic_trace_debugfs_root); | |
90 | fnic_trace_debugfs_root = NULL; | |
abb14148 HS |
91 | |
92 | if (fc_trc_flag) | |
93 | vfree(fc_trc_flag); | |
67125b02 | 94 | } |
4d7007b4 | 95 | |
4d7007b4 | 96 | /* |
abb14148 HS |
97 | * fnic_trace_ctrl_read - |
98 | * Read trace_enable ,fc_trace_enable | |
99 | * or fc_trace_clear debugfs file | |
4d7007b4 HP |
100 | * @filp: The file pointer to read from. |
101 | * @ubuf: The buffer to copy the data to. | |
102 | * @cnt: The number of bytes to read. | |
103 | * @ppos: The position in the file to start reading from. | |
104 | * | |
105 | * Description: | |
abb14148 HS |
106 | * This routine reads value of variable fnic_tracing_enabled or |
107 | * fnic_fc_tracing_enabled or fnic_fc_trace_cleared | |
108 | * and stores into local @buf. | |
109 | * It will start reading file at @ppos and | |
4d7007b4 HP |
110 | * copy up to @cnt of data to @ubuf from @buf. |
111 | * | |
112 | * Returns: | |
113 | * This function returns the amount of data that was read. | |
114 | */ | |
115 | static ssize_t fnic_trace_ctrl_read(struct file *filp, | |
116 | char __user *ubuf, | |
117 | size_t cnt, loff_t *ppos) | |
118 | { | |
119 | char buf[64]; | |
120 | int len; | |
abb14148 HS |
121 | u8 *trace_type; |
122 | len = 0; | |
123 | trace_type = (u8 *)filp->private_data; | |
124 | if (*trace_type == fc_trc_flag->fnic_trace) | |
125 | len = sprintf(buf, "%u\n", fnic_tracing_enabled); | |
126 | else if (*trace_type == fc_trc_flag->fc_trace) | |
127 | len = sprintf(buf, "%u\n", fnic_fc_tracing_enabled); | |
128 | else if (*trace_type == fc_trc_flag->fc_clear) | |
129 | len = sprintf(buf, "%u\n", fnic_fc_trace_cleared); | |
130 | else | |
131 | pr_err("fnic: Cannot read to any debugfs file\n"); | |
4d7007b4 HP |
132 | |
133 | return simple_read_from_buffer(ubuf, cnt, ppos, buf, len); | |
134 | } | |
135 | ||
136 | /* | |
abb14148 HS |
137 | * fnic_trace_ctrl_write - |
138 | * Write to trace_enable, fc_trace_enable or | |
139 | * fc_trace_clear debugfs file | |
4d7007b4 HP |
140 | * @filp: The file pointer to write from. |
141 | * @ubuf: The buffer to copy the data from. | |
142 | * @cnt: The number of bytes to write. | |
143 | * @ppos: The position in the file to start writing to. | |
144 | * | |
145 | * Description: | |
146 | * This routine writes data from user buffer @ubuf to buffer @buf and | |
abb14148 HS |
147 | * sets fc_trace_enable ,tracing_enable or fnic_fc_trace_cleared |
148 | * value as per user input. | |
4d7007b4 HP |
149 | * |
150 | * Returns: | |
151 | * This function returns the amount of data that was written. | |
152 | */ | |
153 | static ssize_t fnic_trace_ctrl_write(struct file *filp, | |
154 | const char __user *ubuf, | |
155 | size_t cnt, loff_t *ppos) | |
156 | { | |
157 | char buf[64]; | |
158 | unsigned long val; | |
159 | int ret; | |
abb14148 HS |
160 | u8 *trace_type; |
161 | trace_type = (u8 *)filp->private_data; | |
4d7007b4 HP |
162 | |
163 | if (cnt >= sizeof(buf)) | |
164 | return -EINVAL; | |
165 | ||
166 | if (copy_from_user(&buf, ubuf, cnt)) | |
167 | return -EFAULT; | |
168 | ||
169 | buf[cnt] = 0; | |
170 | ||
171 | ret = kstrtoul(buf, 10, &val); | |
172 | if (ret < 0) | |
173 | return ret; | |
174 | ||
abb14148 HS |
175 | if (*trace_type == fc_trc_flag->fnic_trace) |
176 | fnic_tracing_enabled = val; | |
177 | else if (*trace_type == fc_trc_flag->fc_trace) | |
178 | fnic_fc_tracing_enabled = val; | |
179 | else if (*trace_type == fc_trc_flag->fc_clear) | |
180 | fnic_fc_trace_cleared = val; | |
181 | else | |
1a84db56 | 182 | pr_err("fnic: cannot write to any debugfs file\n"); |
abb14148 | 183 | |
4d7007b4 HP |
184 | (*ppos)++; |
185 | ||
186 | return cnt; | |
187 | } | |
188 | ||
abb14148 HS |
189 | static const struct file_operations fnic_trace_ctrl_fops = { |
190 | .owner = THIS_MODULE, | |
d9462140 | 191 | .open = simple_open, |
abb14148 HS |
192 | .read = fnic_trace_ctrl_read, |
193 | .write = fnic_trace_ctrl_write, | |
194 | }; | |
195 | ||
4d7007b4 HP |
196 | /* |
197 | * fnic_trace_debugfs_open - Open the fnic trace log | |
198 | * @inode: The inode pointer | |
199 | * @file: The file pointer to attach the log output | |
200 | * | |
201 | * Description: | |
202 | * This routine is the entry point for the debugfs open file operation. | |
203 | * It allocates the necessary buffer for the log, fills the buffer from | |
204 | * the in-memory log and then returns a pointer to that log in | |
205 | * the private_data field in @file. | |
206 | * | |
207 | * Returns: | |
208 | * This function returns zero if successful. On error it will return | |
209 | * a negative error value. | |
210 | */ | |
211 | static int fnic_trace_debugfs_open(struct inode *inode, | |
212 | struct file *file) | |
213 | { | |
214 | fnic_dbgfs_t *fnic_dbg_prt; | |
abb14148 HS |
215 | u8 *rdata_ptr; |
216 | rdata_ptr = (u8 *)inode->i_private; | |
4d7007b4 HP |
217 | fnic_dbg_prt = kzalloc(sizeof(fnic_dbgfs_t), GFP_KERNEL); |
218 | if (!fnic_dbg_prt) | |
219 | return -ENOMEM; | |
220 | ||
abb14148 | 221 | if (*rdata_ptr == fc_trc_flag->fnic_trace) { |
42bc47b3 KC |
222 | fnic_dbg_prt->buffer = vmalloc(array3_size(3, trace_max_pages, |
223 | PAGE_SIZE)); | |
abb14148 HS |
224 | if (!fnic_dbg_prt->buffer) { |
225 | kfree(fnic_dbg_prt); | |
226 | return -ENOMEM; | |
227 | } | |
228 | memset((void *)fnic_dbg_prt->buffer, 0, | |
229 | 3 * (trace_max_pages * PAGE_SIZE)); | |
230 | fnic_dbg_prt->buffer_len = fnic_get_trace_data(fnic_dbg_prt); | |
231 | } else { | |
232 | fnic_dbg_prt->buffer = | |
42bc47b3 KC |
233 | vmalloc(array3_size(3, fnic_fc_trace_max_pages, |
234 | PAGE_SIZE)); | |
abb14148 HS |
235 | if (!fnic_dbg_prt->buffer) { |
236 | kfree(fnic_dbg_prt); | |
237 | return -ENOMEM; | |
238 | } | |
239 | memset((void *)fnic_dbg_prt->buffer, 0, | |
240 | 3 * (fnic_fc_trace_max_pages * PAGE_SIZE)); | |
241 | fnic_dbg_prt->buffer_len = | |
242 | fnic_fc_trace_get_data(fnic_dbg_prt, *rdata_ptr); | |
4d7007b4 | 243 | } |
4d7007b4 | 244 | file->private_data = fnic_dbg_prt; |
abb14148 | 245 | |
4d7007b4 HP |
246 | return 0; |
247 | } | |
248 | ||
249 | /* | |
250 | * fnic_trace_debugfs_lseek - Seek through a debugfs file | |
251 | * @file: The file pointer to seek through. | |
252 | * @offset: The offset to seek to or the amount to seek by. | |
253 | * @howto: Indicates how to seek. | |
254 | * | |
255 | * Description: | |
256 | * This routine is the entry point for the debugfs lseek file operation. | |
257 | * The @howto parameter indicates whether @offset is the offset to directly | |
258 | * seek to, or if it is a value to seek forward or reverse by. This function | |
259 | * figures out what the new offset of the debugfs file will be and assigns | |
260 | * that value to the f_pos field of @file. | |
261 | * | |
262 | * Returns: | |
263 | * This function returns the new offset if successful and returns a negative | |
264 | * error if unable to process the seek. | |
265 | */ | |
266 | static loff_t fnic_trace_debugfs_lseek(struct file *file, | |
267 | loff_t offset, | |
268 | int howto) | |
269 | { | |
270 | fnic_dbgfs_t *fnic_dbg_prt = file->private_data; | |
eb5881d3 AV |
271 | return fixed_size_llseek(file, offset, howto, |
272 | fnic_dbg_prt->buffer_len); | |
4d7007b4 HP |
273 | } |
274 | ||
275 | /* | |
276 | * fnic_trace_debugfs_read - Read a debugfs file | |
277 | * @file: The file pointer to read from. | |
278 | * @ubuf: The buffer to copy the data to. | |
279 | * @nbytes: The number of bytes to read. | |
280 | * @pos: The position in the file to start reading from. | |
281 | * | |
282 | * Description: | |
283 | * This routine reads data from the buffer indicated in the private_data | |
284 | * field of @file. It will start reading at @pos and copy up to @nbytes of | |
285 | * data to @ubuf. | |
286 | * | |
287 | * Returns: | |
288 | * This function returns the amount of data that was read (this could be | |
289 | * less than @nbytes if the end of the file was reached). | |
290 | */ | |
291 | static ssize_t fnic_trace_debugfs_read(struct file *file, | |
292 | char __user *ubuf, | |
293 | size_t nbytes, | |
294 | loff_t *pos) | |
295 | { | |
296 | fnic_dbgfs_t *fnic_dbg_prt = file->private_data; | |
297 | int rc = 0; | |
298 | rc = simple_read_from_buffer(ubuf, nbytes, pos, | |
299 | fnic_dbg_prt->buffer, | |
300 | fnic_dbg_prt->buffer_len); | |
301 | return rc; | |
302 | } | |
303 | ||
304 | /* | |
305 | * fnic_trace_debugfs_release - Release the buffer used to store | |
306 | * debugfs file data | |
307 | * @inode: The inode pointer | |
308 | * @file: The file pointer that contains the buffer to release | |
309 | * | |
310 | * Description: | |
311 | * This routine frees the buffer that was allocated when the debugfs | |
312 | * file was opened. | |
313 | * | |
314 | * Returns: | |
315 | * This function returns zero. | |
316 | */ | |
317 | static int fnic_trace_debugfs_release(struct inode *inode, | |
318 | struct file *file) | |
319 | { | |
320 | fnic_dbgfs_t *fnic_dbg_prt = file->private_data; | |
321 | ||
322 | vfree(fnic_dbg_prt->buffer); | |
323 | kfree(fnic_dbg_prt); | |
324 | return 0; | |
325 | } | |
326 | ||
4d7007b4 HP |
327 | static const struct file_operations fnic_trace_debugfs_fops = { |
328 | .owner = THIS_MODULE, | |
329 | .open = fnic_trace_debugfs_open, | |
330 | .llseek = fnic_trace_debugfs_lseek, | |
331 | .read = fnic_trace_debugfs_read, | |
332 | .release = fnic_trace_debugfs_release, | |
333 | }; | |
334 | ||
335 | /* | |
336 | * fnic_trace_debugfs_init - Initialize debugfs for fnic trace logging | |
337 | * | |
338 | * Description: | |
339 | * When Debugfs is configured this routine sets up the fnic debugfs | |
340 | * file system. If not already created, this routine will create the | |
67125b02 HP |
341 | * create file trace to log fnic trace buffer output into debugfs and |
342 | * it will also create file trace_enable to control enable/disable of | |
343 | * trace logging into trace buffer. | |
4d7007b4 | 344 | */ |
1dbaa379 | 345 | void fnic_trace_debugfs_init(void) |
4d7007b4 | 346 | { |
4d7007b4 | 347 | fnic_trace_enable = debugfs_create_file("tracing_enable", |
abb14148 HS |
348 | S_IFREG|S_IRUGO|S_IWUSR, |
349 | fnic_trace_debugfs_root, | |
350 | &(fc_trc_flag->fnic_trace), | |
351 | &fnic_trace_ctrl_fops); | |
4d7007b4 | 352 | |
4d7007b4 | 353 | fnic_trace_debugfs_file = debugfs_create_file("trace", |
abb14148 HS |
354 | S_IFREG|S_IRUGO|S_IWUSR, |
355 | fnic_trace_debugfs_root, | |
356 | &(fc_trc_flag->fnic_trace), | |
357 | &fnic_trace_debugfs_fops); | |
4d7007b4 HP |
358 | } |
359 | ||
360 | /* | |
361 | * fnic_trace_debugfs_terminate - Tear down debugfs infrastructure | |
362 | * | |
363 | * Description: | |
364 | * When Debugfs is configured this routine removes debugfs file system | |
365 | * elements that are specific to fnic trace logging. | |
366 | */ | |
367 | void fnic_trace_debugfs_terminate(void) | |
368 | { | |
abb14148 HS |
369 | debugfs_remove(fnic_trace_debugfs_file); |
370 | fnic_trace_debugfs_file = NULL; | |
371 | ||
372 | debugfs_remove(fnic_trace_enable); | |
373 | fnic_trace_enable = NULL; | |
374 | } | |
375 | ||
376 | /* | |
377 | * fnic_fc_trace_debugfs_init - | |
378 | * Initialize debugfs for fnic control frame trace logging | |
379 | * | |
380 | * Description: | |
381 | * When Debugfs is configured this routine sets up the fnic_fc debugfs | |
382 | * file system. If not already created, this routine will create the | |
383 | * create file trace to log fnic fc trace buffer output into debugfs and | |
384 | * it will also create file fc_trace_enable to control enable/disable of | |
385 | * trace logging into trace buffer. | |
386 | */ | |
387 | ||
1dbaa379 | 388 | void fnic_fc_trace_debugfs_init(void) |
abb14148 | 389 | { |
abb14148 HS |
390 | fnic_fc_trace_enable = debugfs_create_file("fc_trace_enable", |
391 | S_IFREG|S_IRUGO|S_IWUSR, | |
392 | fnic_trace_debugfs_root, | |
393 | &(fc_trc_flag->fc_trace), | |
394 | &fnic_trace_ctrl_fops); | |
395 | ||
abb14148 HS |
396 | fnic_fc_trace_clear = debugfs_create_file("fc_trace_clear", |
397 | S_IFREG|S_IRUGO|S_IWUSR, | |
398 | fnic_trace_debugfs_root, | |
399 | &(fc_trc_flag->fc_clear), | |
400 | &fnic_trace_ctrl_fops); | |
401 | ||
abb14148 HS |
402 | fnic_fc_rdata_trace_debugfs_file = |
403 | debugfs_create_file("fc_trace_rdata", | |
404 | S_IFREG|S_IRUGO|S_IWUSR, | |
405 | fnic_trace_debugfs_root, | |
406 | &(fc_trc_flag->fc_normal_file), | |
407 | &fnic_trace_debugfs_fops); | |
408 | ||
abb14148 HS |
409 | fnic_fc_trace_debugfs_file = |
410 | debugfs_create_file("fc_trace", | |
411 | S_IFREG|S_IRUGO|S_IWUSR, | |
412 | fnic_trace_debugfs_root, | |
413 | &(fc_trc_flag->fc_row_file), | |
414 | &fnic_trace_debugfs_fops); | |
abb14148 HS |
415 | } |
416 | ||
417 | /* | |
418 | * fnic_fc_trace_debugfs_terminate - Tear down debugfs infrastructure | |
419 | * | |
420 | * Description: | |
421 | * When Debugfs is configured this routine removes debugfs file system | |
422 | * elements that are specific to fnic_fc trace logging. | |
423 | */ | |
424 | ||
425 | void fnic_fc_trace_debugfs_terminate(void) | |
426 | { | |
427 | debugfs_remove(fnic_fc_trace_debugfs_file); | |
428 | fnic_fc_trace_debugfs_file = NULL; | |
429 | ||
430 | debugfs_remove(fnic_fc_rdata_trace_debugfs_file); | |
431 | fnic_fc_rdata_trace_debugfs_file = NULL; | |
432 | ||
433 | debugfs_remove(fnic_fc_trace_enable); | |
434 | fnic_fc_trace_enable = NULL; | |
435 | ||
436 | debugfs_remove(fnic_fc_trace_clear); | |
437 | fnic_fc_trace_clear = NULL; | |
67125b02 HP |
438 | } |
439 | ||
440 | /* | |
441 | * fnic_reset_stats_open - Open the reset_stats file | |
442 | * @inode: The inode pointer. | |
443 | * @file: The file pointer to attach the stats reset flag. | |
444 | * | |
445 | * Description: | |
446 | * This routine opens a debugsfs file reset_stats and stores i_private data | |
447 | * to debug structure to retrieve later for while performing other | |
448 | * file oprations. | |
449 | * | |
450 | * Returns: | |
451 | * This function returns zero if successful. | |
452 | */ | |
453 | static int fnic_reset_stats_open(struct inode *inode, struct file *file) | |
454 | { | |
455 | struct stats_debug_info *debug; | |
456 | ||
457 | debug = kzalloc(sizeof(struct stats_debug_info), GFP_KERNEL); | |
458 | if (!debug) | |
459 | return -ENOMEM; | |
460 | ||
461 | debug->i_private = inode->i_private; | |
462 | ||
463 | file->private_data = debug; | |
464 | ||
465 | return 0; | |
466 | } | |
467 | ||
468 | /* | |
469 | * fnic_reset_stats_read - Read a reset_stats debugfs file | |
470 | * @filp: The file pointer to read from. | |
471 | * @ubuf: The buffer to copy the data to. | |
472 | * @cnt: The number of bytes to read. | |
473 | * @ppos: The position in the file to start reading from. | |
474 | * | |
475 | * Description: | |
476 | * This routine reads value of variable reset_stats | |
477 | * and stores into local @buf. It will start reading file at @ppos and | |
478 | * copy up to @cnt of data to @ubuf from @buf. | |
479 | * | |
480 | * Returns: | |
481 | * This function returns the amount of data that was read. | |
482 | */ | |
483 | static ssize_t fnic_reset_stats_read(struct file *file, | |
484 | char __user *ubuf, | |
485 | size_t cnt, loff_t *ppos) | |
486 | { | |
487 | struct stats_debug_info *debug = file->private_data; | |
488 | struct fnic *fnic = (struct fnic *)debug->i_private; | |
489 | char buf[64]; | |
490 | int len; | |
491 | ||
492 | len = sprintf(buf, "%u\n", fnic->reset_stats); | |
493 | ||
494 | return simple_read_from_buffer(ubuf, cnt, ppos, buf, len); | |
495 | } | |
496 | ||
497 | /* | |
498 | * fnic_reset_stats_write - Write to reset_stats debugfs file | |
499 | * @filp: The file pointer to write from. | |
500 | * @ubuf: The buffer to copy the data from. | |
501 | * @cnt: The number of bytes to write. | |
502 | * @ppos: The position in the file to start writing to. | |
503 | * | |
504 | * Description: | |
505 | * This routine writes data from user buffer @ubuf to buffer @buf and | |
506 | * resets cumulative stats of fnic. | |
507 | * | |
508 | * Returns: | |
509 | * This function returns the amount of data that was written. | |
510 | */ | |
511 | static ssize_t fnic_reset_stats_write(struct file *file, | |
512 | const char __user *ubuf, | |
513 | size_t cnt, loff_t *ppos) | |
514 | { | |
515 | struct stats_debug_info *debug = file->private_data; | |
516 | struct fnic *fnic = (struct fnic *)debug->i_private; | |
517 | struct fnic_stats *stats = &fnic->fnic_stats; | |
518 | u64 *io_stats_p = (u64 *)&stats->io_stats; | |
519 | u64 *fw_stats_p = (u64 *)&stats->fw_stats; | |
520 | char buf[64]; | |
521 | unsigned long val; | |
522 | int ret; | |
523 | ||
524 | if (cnt >= sizeof(buf)) | |
525 | return -EINVAL; | |
526 | ||
527 | if (copy_from_user(&buf, ubuf, cnt)) | |
528 | return -EFAULT; | |
529 | ||
530 | buf[cnt] = 0; | |
531 | ||
532 | ret = kstrtoul(buf, 10, &val); | |
533 | if (ret < 0) | |
534 | return ret; | |
535 | ||
536 | fnic->reset_stats = val; | |
537 | ||
538 | if (fnic->reset_stats) { | |
539 | /* Skip variable is used to avoid descrepancies to Num IOs | |
540 | * and IO Completions stats. Skip incrementing No IO Compls | |
541 | * for pending active IOs after reset stats | |
542 | */ | |
543 | atomic64_set(&fnic->io_cmpl_skip, | |
544 | atomic64_read(&stats->io_stats.active_ios)); | |
545 | memset(&stats->abts_stats, 0, sizeof(struct abort_stats)); | |
546 | memset(&stats->term_stats, 0, | |
547 | sizeof(struct terminate_stats)); | |
548 | memset(&stats->reset_stats, 0, sizeof(struct reset_stats)); | |
549 | memset(&stats->misc_stats, 0, sizeof(struct misc_stats)); | |
550 | memset(&stats->vlan_stats, 0, sizeof(struct vlan_stats)); | |
551 | memset(io_stats_p+1, 0, | |
552 | sizeof(struct io_path_stats) - sizeof(u64)); | |
553 | memset(fw_stats_p+1, 0, | |
554 | sizeof(struct fw_stats) - sizeof(u64)); | |
22807aa8 | 555 | ktime_get_real_ts64(&stats->stats_timestamps.last_reset_time); |
4d7007b4 | 556 | } |
67125b02 HP |
557 | |
558 | (*ppos)++; | |
559 | return cnt; | |
560 | } | |
561 | ||
562 | /* | |
563 | * fnic_reset_stats_release - Release the buffer used to store | |
564 | * debugfs file data | |
565 | * @inode: The inode pointer | |
566 | * @file: The file pointer that contains the buffer to release | |
567 | * | |
568 | * Description: | |
569 | * This routine frees the buffer that was allocated when the debugfs | |
570 | * file was opened. | |
571 | * | |
572 | * Returns: | |
573 | * This function returns zero. | |
574 | */ | |
575 | static int fnic_reset_stats_release(struct inode *inode, | |
576 | struct file *file) | |
577 | { | |
578 | struct stats_debug_info *debug = file->private_data; | |
579 | kfree(debug); | |
580 | return 0; | |
581 | } | |
582 | ||
583 | /* | |
584 | * fnic_stats_debugfs_open - Open the stats file for specific host | |
585 | * and get fnic stats. | |
586 | * @inode: The inode pointer. | |
587 | * @file: The file pointer to attach the specific host statistics. | |
588 | * | |
589 | * Description: | |
590 | * This routine opens a debugsfs file stats of specific host and print | |
591 | * fnic stats. | |
592 | * | |
593 | * Returns: | |
594 | * This function returns zero if successful. | |
595 | */ | |
596 | static int fnic_stats_debugfs_open(struct inode *inode, | |
597 | struct file *file) | |
598 | { | |
599 | struct fnic *fnic = inode->i_private; | |
600 | struct fnic_stats *fnic_stats = &fnic->fnic_stats; | |
601 | struct stats_debug_info *debug; | |
602 | int buf_size = 2 * PAGE_SIZE; | |
603 | ||
604 | debug = kzalloc(sizeof(struct stats_debug_info), GFP_KERNEL); | |
605 | if (!debug) | |
606 | return -ENOMEM; | |
607 | ||
608 | debug->debug_buffer = vmalloc(buf_size); | |
609 | if (!debug->debug_buffer) { | |
610 | kfree(debug); | |
611 | return -ENOMEM; | |
612 | } | |
613 | ||
614 | debug->buf_size = buf_size; | |
615 | memset((void *)debug->debug_buffer, 0, buf_size); | |
616 | debug->buffer_len = fnic_get_stats_data(debug, fnic_stats); | |
617 | ||
618 | file->private_data = debug; | |
619 | ||
620 | return 0; | |
621 | } | |
622 | ||
623 | /* | |
624 | * fnic_stats_debugfs_read - Read a debugfs file | |
625 | * @file: The file pointer to read from. | |
626 | * @ubuf: The buffer to copy the data to. | |
627 | * @nbytes: The number of bytes to read. | |
628 | * @pos: The position in the file to start reading from. | |
629 | * | |
630 | * Description: | |
631 | * This routine reads data from the buffer indicated in the private_data | |
632 | * field of @file. It will start reading at @pos and copy up to @nbytes of | |
633 | * data to @ubuf. | |
634 | * | |
635 | * Returns: | |
636 | * This function returns the amount of data that was read (this could be | |
637 | * less than @nbytes if the end of the file was reached). | |
638 | */ | |
639 | static ssize_t fnic_stats_debugfs_read(struct file *file, | |
640 | char __user *ubuf, | |
641 | size_t nbytes, | |
642 | loff_t *pos) | |
643 | { | |
644 | struct stats_debug_info *debug = file->private_data; | |
645 | int rc = 0; | |
646 | rc = simple_read_from_buffer(ubuf, nbytes, pos, | |
647 | debug->debug_buffer, | |
648 | debug->buffer_len); | |
649 | return rc; | |
650 | } | |
651 | ||
652 | /* | |
653 | * fnic_stats_stats_release - Release the buffer used to store | |
654 | * debugfs file data | |
655 | * @inode: The inode pointer | |
656 | * @file: The file pointer that contains the buffer to release | |
657 | * | |
658 | * Description: | |
659 | * This routine frees the buffer that was allocated when the debugfs | |
660 | * file was opened. | |
661 | * | |
662 | * Returns: | |
663 | * This function returns zero. | |
664 | */ | |
665 | static int fnic_stats_debugfs_release(struct inode *inode, | |
666 | struct file *file) | |
667 | { | |
668 | struct stats_debug_info *debug = file->private_data; | |
669 | vfree(debug->debug_buffer); | |
670 | kfree(debug); | |
671 | return 0; | |
672 | } | |
673 | ||
674 | static const struct file_operations fnic_stats_debugfs_fops = { | |
675 | .owner = THIS_MODULE, | |
676 | .open = fnic_stats_debugfs_open, | |
677 | .read = fnic_stats_debugfs_read, | |
678 | .release = fnic_stats_debugfs_release, | |
679 | }; | |
680 | ||
681 | static const struct file_operations fnic_reset_debugfs_fops = { | |
682 | .owner = THIS_MODULE, | |
683 | .open = fnic_reset_stats_open, | |
684 | .read = fnic_reset_stats_read, | |
685 | .write = fnic_reset_stats_write, | |
686 | .release = fnic_reset_stats_release, | |
687 | }; | |
688 | ||
689 | /* | |
690 | * fnic_stats_init - Initialize stats struct and create stats file per fnic | |
691 | * | |
692 | * Description: | |
693 | * When Debugfs is configured this routine sets up the stats file per fnic | |
694 | * It will create file stats and reset_stats under statistics/host# directory | |
695 | * to log per fnic stats. | |
696 | */ | |
1dbaa379 | 697 | void fnic_stats_debugfs_init(struct fnic *fnic) |
67125b02 | 698 | { |
67125b02 HP |
699 | char name[16]; |
700 | ||
701 | snprintf(name, sizeof(name), "host%d", fnic->lport->host->host_no); | |
702 | ||
67125b02 HP |
703 | fnic->fnic_stats_debugfs_host = debugfs_create_dir(name, |
704 | fnic_stats_debugfs_root); | |
67125b02 HP |
705 | |
706 | fnic->fnic_stats_debugfs_file = debugfs_create_file("stats", | |
707 | S_IFREG|S_IRUGO|S_IWUSR, | |
708 | fnic->fnic_stats_debugfs_host, | |
709 | fnic, | |
710 | &fnic_stats_debugfs_fops); | |
67125b02 HP |
711 | |
712 | fnic->fnic_reset_debugfs_file = debugfs_create_file("reset_stats", | |
713 | S_IFREG|S_IRUGO|S_IWUSR, | |
714 | fnic->fnic_stats_debugfs_host, | |
715 | fnic, | |
716 | &fnic_reset_debugfs_fops); | |
67125b02 HP |
717 | } |
718 | ||
719 | /* | |
720 | * fnic_stats_debugfs_remove - Tear down debugfs infrastructure of stats | |
721 | * | |
722 | * Description: | |
723 | * When Debugfs is configured this routine removes debugfs file system | |
724 | * elements that are specific to fnic stats. | |
725 | */ | |
726 | void fnic_stats_debugfs_remove(struct fnic *fnic) | |
727 | { | |
728 | if (!fnic) | |
729 | return; | |
730 | ||
731 | debugfs_remove(fnic->fnic_stats_debugfs_file); | |
732 | fnic->fnic_stats_debugfs_file = NULL; | |
733 | ||
734 | debugfs_remove(fnic->fnic_reset_debugfs_file); | |
735 | fnic->fnic_reset_debugfs_file = NULL; | |
736 | ||
737 | debugfs_remove(fnic->fnic_stats_debugfs_host); | |
738 | fnic->fnic_stats_debugfs_host = NULL; | |
4d7007b4 | 739 | } |