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LU-10632 tests: recovery-small test_26 idle_timeout
[fs/lustre-release.git] / lustre / llite / lproc_llite.c
1 /*
2  * GPL HEADER START
3  *
4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 only,
8  * as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * General Public License version 2 for more details (a copy is included
14  * in the LICENSE file that accompanied this code).
15  *
16  * You should have received a copy of the GNU General Public License
17  * version 2 along with this program; If not, see
18  * http://www.gnu.org/licenses/gpl-2.0.html
19  *
20  * GPL HEADER END
21  */
22 /*
23  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24  * Use is subject to license terms.
25  *
26  * Copyright (c) 2012, 2017, Intel Corporation.
27  */
28 /*
29  * This file is part of Lustre, http://www.lustre.org/
30  * Lustre is a trademark of Sun Microsystems, Inc.
31  */
32 #define DEBUG_SUBSYSTEM S_LLITE
33
34 #include <linux/version.h>
35 #include <linux/user_namespace.h>
36 #include <linux/uidgid.h>
37
38 #include <uapi/linux/lustre/lustre_param.h>
39 #include <lprocfs_status.h>
40 #include <obd_support.h>
41
42 #include "llite_internal.h"
43 #include "vvp_internal.h"
44
45 static struct kobject *llite_kobj;
46 static struct dentry *llite_root;
47
48 static void llite_kobj_release(struct kobject *kobj)
49 {
50         if (!IS_ERR_OR_NULL(llite_root)) {
51                 debugfs_remove(llite_root);
52                 llite_root = NULL;
53         }
54
55         kfree(kobj);
56 }
57
58 static struct kobj_type llite_kobj_ktype = {
59         .release        = llite_kobj_release,
60         .sysfs_ops      = &lustre_sysfs_ops,
61 };
62
63 int llite_tunables_register(void)
64 {
65         int rc;
66
67         llite_kobj = kzalloc(sizeof(*llite_kobj), GFP_KERNEL);
68         if (!llite_kobj)
69                 return -ENOMEM;
70
71         llite_kobj->kset = lustre_kset;
72         rc = kobject_init_and_add(llite_kobj, &llite_kobj_ktype,
73                                   &lustre_kset->kobj, "%s", "llite");
74         if (rc)
75                 goto free_kobj;
76
77         llite_root = debugfs_create_dir("llite", debugfs_lustre_root);
78         return 0;
79
80 free_kobj:
81         kobject_put(llite_kobj);
82         llite_kobj = NULL;
83
84         return rc;
85 }
86
87 void llite_tunables_unregister(void)
88 {
89         kobject_put(llite_kobj);
90         llite_kobj = NULL;
91 }
92
93 /* <debugfs>/lustre/llite mount point registration */
94 static const struct file_operations ll_rw_extents_stats_fops;
95 static const struct file_operations ll_rw_extents_stats_pp_fops;
96 static const struct file_operations ll_rw_offset_stats_fops;
97
98 /**
99  * ll_stats_pid_write() - Determine if stats collection should be enabled
100  * @buf: Buffer containing the data written
101  * @len: Number of bytes in the buffer
102  *
103  * Several proc files begin collecting stats when a value is written, and stop
104  * collecting when either '0' or 'disable' is written. This function checks the
105  * written value to see if collection should be enabled or disabled.
106  *
107  * Return: If '0' or 'disable' is provided, 0 is returned. If the text
108  * equivalent of a number is written, that number is returned. Otherwise,
109  * 1 is returned. Non-zero return values indicate collection should be enabled.
110  */
111 static s64 ll_stats_pid_write(const char __user *buf, size_t len)
112 {
113         unsigned long long value = 1;
114         char kernbuf[16];
115         int rc;
116
117         rc = kstrtoull_from_user(buf, len, 0, &value);
118         if (rc < 0 && len < sizeof(kernbuf)) {
119                 if (copy_from_user(kernbuf, buf, len))
120                         return -EFAULT;
121                 kernbuf[len] = 0;
122
123                 if (kernbuf[len - 1] == '\n')
124                         kernbuf[len - 1] = 0;
125
126                 if (strncasecmp(kernbuf, "disable", 7) == 0)
127                         value = 0;
128         }
129
130         return value;
131 }
132
133 static ssize_t blocksize_show(struct kobject *kobj, struct attribute *attr,
134                               char *buf)
135 {
136         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
137                                               ll_kset.kobj);
138         struct obd_statfs osfs;
139         int rc;
140
141         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
142         if (rc)
143                 return rc;
144
145         return sprintf(buf, "%u\n", osfs.os_bsize);
146 }
147 LUSTRE_RO_ATTR(blocksize);
148
149 static ssize_t stat_blocksize_show(struct kobject *kobj, struct attribute *attr,
150                                    char *buf)
151 {
152         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
153                                               ll_kset.kobj);
154
155         return sprintf(buf, "%u\n", sbi->ll_stat_blksize);
156 }
157
158 static ssize_t stat_blocksize_store(struct kobject *kobj,
159                                     struct attribute *attr,
160                                     const char *buffer,
161                                     size_t count)
162 {
163         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
164                                               ll_kset.kobj);
165         unsigned int val;
166         int rc;
167
168         rc = kstrtouint(buffer, 10, &val);
169         if (rc)
170                 return rc;
171
172         if (val != 0 && (val < PAGE_SIZE || (val & (val - 1))) != 0)
173                 return -ERANGE;
174
175         sbi->ll_stat_blksize = val;
176
177         return count;
178 }
179 LUSTRE_RW_ATTR(stat_blocksize);
180
181 static ssize_t kbytestotal_show(struct kobject *kobj, struct attribute *attr,
182                                 char *buf)
183 {
184         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
185                                               ll_kset.kobj);
186         struct obd_statfs osfs;
187         u32 blk_size;
188         u64 result;
189         int rc;
190
191         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
192         if (rc)
193                 return rc;
194
195         blk_size = osfs.os_bsize >> 10;
196         result = osfs.os_blocks;
197
198         while (blk_size >>= 1)
199                 result <<= 1;
200
201         return sprintf(buf, "%llu\n", result);
202 }
203 LUSTRE_RO_ATTR(kbytestotal);
204
205 static ssize_t kbytesfree_show(struct kobject *kobj, struct attribute *attr,
206                                char *buf)
207 {
208         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
209                                               ll_kset.kobj);
210         struct obd_statfs osfs;
211         u32 blk_size;
212         u64 result;
213         int rc;
214
215         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
216         if (rc)
217                 return rc;
218
219         blk_size = osfs.os_bsize >> 10;
220         result = osfs.os_bfree;
221
222         while (blk_size >>= 1)
223                 result <<= 1;
224
225         return sprintf(buf, "%llu\n", result);
226 }
227 LUSTRE_RO_ATTR(kbytesfree);
228
229 static ssize_t kbytesavail_show(struct kobject *kobj, struct attribute *attr,
230                                 char *buf)
231 {
232         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
233                                               ll_kset.kobj);
234         struct obd_statfs osfs;
235         u32 blk_size;
236         u64 result;
237         int rc;
238
239         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
240         if (rc)
241                 return rc;
242
243         blk_size = osfs.os_bsize >> 10;
244         result = osfs.os_bavail;
245
246         while (blk_size >>= 1)
247                 result <<= 1;
248
249         return sprintf(buf, "%llu\n", result);
250 }
251 LUSTRE_RO_ATTR(kbytesavail);
252
253 static ssize_t filestotal_show(struct kobject *kobj, struct attribute *attr,
254                                char *buf)
255 {
256         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
257                                               ll_kset.kobj);
258         struct obd_statfs osfs;
259         int rc;
260
261         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
262         if (rc)
263                 return rc;
264
265         return sprintf(buf, "%llu\n", osfs.os_files);
266 }
267 LUSTRE_RO_ATTR(filestotal);
268
269 static ssize_t filesfree_show(struct kobject *kobj, struct attribute *attr,
270                               char *buf)
271 {
272         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
273                                               ll_kset.kobj);
274         struct obd_statfs osfs;
275         int rc;
276
277         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
278         if (rc)
279                 return rc;
280
281         return sprintf(buf, "%llu\n", osfs.os_ffree);
282 }
283 LUSTRE_RO_ATTR(filesfree);
284
285 static ssize_t client_type_show(struct kobject *kobj, struct attribute *attr,
286                                 char *buf)
287 {
288         return sprintf(buf, "local client\n");
289 }
290 LUSTRE_RO_ATTR(client_type);
291
292 LUSTRE_RW_ATTR(foreign_symlink_enable);
293
294 LUSTRE_RW_ATTR(foreign_symlink_prefix);
295
296 LUSTRE_RW_ATTR(foreign_symlink_upcall);
297
298 LUSTRE_WO_ATTR(foreign_symlink_upcall_info);
299
300 static ssize_t fstype_show(struct kobject *kobj, struct attribute *attr,
301                            char *buf)
302 {
303         return sprintf(buf, "lustre\n");
304 }
305 LUSTRE_RO_ATTR(fstype);
306
307 static ssize_t uuid_show(struct kobject *kobj, struct attribute *attr,
308                          char *buf)
309 {
310         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
311                                               ll_kset.kobj);
312
313         return sprintf(buf, "%s\n", sbi->ll_sb_uuid.uuid);
314 }
315 LUSTRE_RO_ATTR(uuid);
316
317 static int ll_site_stats_seq_show(struct seq_file *m, void *v)
318 {
319         struct super_block *sb = m->private;
320
321         /*
322          * See description of statistical counters in struct cl_site, and
323          * struct lu_site.
324          */
325         return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site), m);
326 }
327
328 LDEBUGFS_SEQ_FOPS_RO(ll_site_stats);
329
330 static ssize_t max_read_ahead_mb_show(struct kobject *kobj,
331                                       struct attribute *attr, char *buf)
332 {
333         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
334                                               ll_kset.kobj);
335
336         return scnprintf(buf, PAGE_SIZE, "%lu\n",
337                         PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages));
338 }
339
340 static ssize_t max_read_ahead_mb_store(struct kobject *kobj,
341                                        struct attribute *attr,
342                                        const char *buffer, size_t count)
343 {
344         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
345                                               ll_kset.kobj);
346         u64 ra_max_mb, pages_number;
347         int rc;
348
349         rc = sysfs_memparse(buffer, count, &ra_max_mb, "MiB");
350         if (rc)
351                 return rc;
352
353         pages_number = round_up(ra_max_mb, 1024 * 1024) >> PAGE_SHIFT;
354         CDEBUG(D_INFO, "%s: set max_read_ahead_mb=%llu (%llu pages)\n",
355                sbi->ll_fsname, PAGES_TO_MiB(pages_number), pages_number);
356         if (pages_number > cfs_totalram_pages() / 2) {
357                 /* 1/2 of RAM */
358                 CERROR("%s: cannot set max_read_ahead_mb=%llu > totalram/2=%luMB\n",
359                        sbi->ll_fsname, PAGES_TO_MiB(pages_number),
360                        PAGES_TO_MiB(cfs_totalram_pages() / 2));
361                 return -ERANGE;
362         }
363
364         spin_lock(&sbi->ll_lock);
365         sbi->ll_ra_info.ra_max_pages = pages_number;
366         spin_unlock(&sbi->ll_lock);
367
368         return count;
369 }
370 LUSTRE_RW_ATTR(max_read_ahead_mb);
371
372 static ssize_t max_read_ahead_per_file_mb_show(struct kobject *kobj,
373                                                struct attribute *attr,
374                                                char *buf)
375 {
376         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
377                                               ll_kset.kobj);
378
379         return scnprintf(buf, PAGE_SIZE, "%lu\n",
380                          PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages_per_file));
381 }
382
383 static ssize_t max_read_ahead_per_file_mb_store(struct kobject *kobj,
384                                                 struct attribute *attr,
385                                                 const char *buffer,
386                                                 size_t count)
387 {
388         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
389                                               ll_kset.kobj);
390         u64 ra_max_file_mb, pages_number;
391         int rc;
392
393         rc = sysfs_memparse(buffer, count, &ra_max_file_mb, "MiB");
394         if (rc)
395                 return rc;
396
397         pages_number = round_up(ra_max_file_mb, 1024 * 1024) >> PAGE_SHIFT;
398         if (pages_number > sbi->ll_ra_info.ra_max_pages) {
399                 CERROR("%s: cannot set max_read_ahead_per_file_mb=%llu > max_read_ahead_mb=%lu\n",
400                        sbi->ll_fsname, PAGES_TO_MiB(pages_number),
401                        PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages));
402                 return -ERANGE;
403         }
404
405         spin_lock(&sbi->ll_lock);
406         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
407         spin_unlock(&sbi->ll_lock);
408
409         return count;
410 }
411 LUSTRE_RW_ATTR(max_read_ahead_per_file_mb);
412
413 static ssize_t max_read_ahead_whole_mb_show(struct kobject *kobj,
414                                             struct attribute *attr, char *buf)
415 {
416         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
417                                               ll_kset.kobj);
418
419         return scnprintf(buf, PAGE_SIZE, "%lu\n",
420                          PAGES_TO_MiB(sbi->ll_ra_info.ra_max_read_ahead_whole_pages));
421 }
422
423 static ssize_t max_read_ahead_whole_mb_store(struct kobject *kobj,
424                                              struct attribute *attr,
425                                              const char *buffer, size_t count)
426 {
427         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
428                                               ll_kset.kobj);
429         u64 ra_max_whole_mb, pages_number;
430         int rc;
431
432         rc = sysfs_memparse(buffer, count, &ra_max_whole_mb, "MiB");
433         if (rc)
434                 return rc;
435
436         pages_number = round_up(ra_max_whole_mb, 1024 * 1024) >> PAGE_SHIFT;
437         /* Cap this at the current max readahead window size, the readahead
438          * algorithm does this anyway so it's pointless to set it larger.
439          */
440         if (pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
441                 CERROR("%s: cannot set max_read_ahead_whole_mb=%llu > max_read_ahead_per_file_mb=%lu\n",
442                        sbi->ll_fsname, PAGES_TO_MiB(pages_number),
443                        PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages_per_file));
444
445                 return -ERANGE;
446         }
447
448         spin_lock(&sbi->ll_lock);
449         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
450         spin_unlock(&sbi->ll_lock);
451
452         return count;
453 }
454 LUSTRE_RW_ATTR(max_read_ahead_whole_mb);
455
456 static int ll_max_cached_mb_seq_show(struct seq_file *m, void *v)
457 {
458         struct super_block     *sb    = m->private;
459         struct ll_sb_info      *sbi   = ll_s2sbi(sb);
460         struct cl_client_cache *cache = sbi->ll_cache;
461         long max_cached_mb;
462         long unused_mb;
463
464         mutex_lock(&cache->ccc_max_cache_mb_lock);
465         max_cached_mb = PAGES_TO_MiB(cache->ccc_lru_max);
466         unused_mb = PAGES_TO_MiB(atomic_long_read(&cache->ccc_lru_left));
467         mutex_unlock(&cache->ccc_max_cache_mb_lock);
468         seq_printf(m, "users: %d\n"
469                       "max_cached_mb: %ld\n"
470                       "used_mb: %ld\n"
471                       "unused_mb: %ld\n"
472                       "reclaim_count: %u\n",
473                    atomic_read(&cache->ccc_users),
474                    max_cached_mb,
475                    max_cached_mb - unused_mb,
476                    unused_mb,
477                    cache->ccc_lru_shrinkers);
478         return 0;
479 }
480
481 static ssize_t ll_max_cached_mb_seq_write(struct file *file,
482                                           const char __user *buffer,
483                                           size_t count, loff_t *off)
484 {
485         struct seq_file *m = file->private_data;
486         struct super_block *sb = m->private;
487         struct ll_sb_info *sbi = ll_s2sbi(sb);
488         struct cl_client_cache *cache = sbi->ll_cache;
489         struct lu_env *env;
490         long diff = 0;
491         long nrpages = 0;
492         __u16 refcheck;
493         u64 pages_number;
494         int rc;
495         char kernbuf[128], *ptr;
496
497         ENTRY;
498         if (count >= sizeof(kernbuf))
499                 RETURN(-EINVAL);
500
501         if (copy_from_user(kernbuf, buffer, count))
502                 RETURN(-EFAULT);
503         kernbuf[count] = '\0';
504
505         ptr = lprocfs_find_named_value(kernbuf, "max_cached_mb:", &count);
506         rc = sysfs_memparse(ptr, count, &pages_number, "MiB");
507         if (rc)
508                 RETURN(rc);
509
510         pages_number >>= PAGE_SHIFT;
511
512         if (pages_number < 0 || pages_number > cfs_totalram_pages()) {
513                 CERROR("%s: can't set max cache more than %lu MB\n",
514                        sbi->ll_fsname,
515                        PAGES_TO_MiB(cfs_totalram_pages()));
516                 RETURN(-ERANGE);
517         }
518         /* Allow enough cache so clients can make well-formed RPCs */
519         pages_number = max_t(long, pages_number, PTLRPC_MAX_BRW_PAGES);
520
521         mutex_lock(&cache->ccc_max_cache_mb_lock);
522         diff = pages_number - cache->ccc_lru_max;
523
524         /* easy - add more LRU slots. */
525         if (diff >= 0) {
526                 atomic_long_add(diff, &cache->ccc_lru_left);
527                 GOTO(out, rc = 0);
528         }
529
530         env = cl_env_get(&refcheck);
531         if (IS_ERR(env))
532                 GOTO(out_unlock, rc = PTR_ERR(env));
533
534         diff = -diff;
535         while (diff > 0) {
536                 long tmp;
537
538                 /* reduce LRU budget from free slots. */
539                 do {
540                         long lru_left_old, lru_left_new, lru_left_ret;
541
542                         lru_left_old = atomic_long_read(&cache->ccc_lru_left);
543                         if (lru_left_old == 0)
544                                 break;
545
546                         lru_left_new = lru_left_old > diff ?
547                                         lru_left_old - diff : 0;
548                         lru_left_ret =
549                                 atomic_long_cmpxchg(&cache->ccc_lru_left,
550                                                     lru_left_old,
551                                                     lru_left_new);
552                         if (likely(lru_left_old == lru_left_ret)) {
553                                 diff -= lru_left_old - lru_left_new;
554                                 nrpages += lru_left_old - lru_left_new;
555                                 break;
556                         }
557                 } while (1);
558
559                 if (diff <= 0)
560                         break;
561
562                 if (sbi->ll_dt_exp == NULL) { /* being initialized */
563                         rc = -ENODEV;
564                         break;
565                 }
566
567                 /* Request extra free slots to avoid them all being used
568                  * by other processes before this can continue shrinking.
569                  */
570                 tmp = diff + min_t(long, diff, MiB_TO_PAGES(1024));
571                 /* difficult - have to ask OSCs to drop LRU slots. */
572                 rc = obd_set_info_async(env, sbi->ll_dt_exp,
573                                 sizeof(KEY_CACHE_LRU_SHRINK),
574                                 KEY_CACHE_LRU_SHRINK,
575                                 sizeof(tmp), &tmp, NULL);
576                 if (rc < 0)
577                         break;
578         }
579         cl_env_put(env, &refcheck);
580
581 out:
582         if (rc >= 0) {
583                 cache->ccc_lru_max = pages_number;
584                 rc = count;
585         } else {
586                 atomic_long_add(nrpages, &cache->ccc_lru_left);
587         }
588 out_unlock:
589         mutex_unlock(&cache->ccc_max_cache_mb_lock);
590         return rc;
591 }
592 LDEBUGFS_SEQ_FOPS(ll_max_cached_mb);
593
594 static ssize_t checksums_show(struct kobject *kobj, struct attribute *attr,
595                               char *buf)
596 {
597         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
598                                               ll_kset.kobj);
599
600         return sprintf(buf, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
601 }
602
603 static ssize_t checksums_store(struct kobject *kobj, struct attribute *attr,
604                                const char *buffer, size_t count)
605 {
606         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
607                                               ll_kset.kobj);
608         bool val;
609         int tmp;
610         int rc;
611
612         if (!sbi->ll_dt_exp)
613                 /* Not set up yet */
614                 return -EAGAIN;
615
616         rc = kstrtobool(buffer, &val);
617         if (rc)
618                 return rc;
619         if (val)
620                 sbi->ll_flags |= LL_SBI_CHECKSUM;
621         else
622                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
623         tmp = val;
624
625         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
626                                 KEY_CHECKSUM, sizeof(tmp), &tmp, NULL);
627         if (rc)
628                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
629
630         return count;
631 }
632 LUSTRE_RW_ATTR(checksums);
633
634 LUSTRE_ATTR(checksum_pages, 0644, checksums_show, checksums_store);
635
636 static ssize_t ll_rd_track_id(struct kobject *kobj, char *buf,
637                               enum stats_track_type type)
638 {
639         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
640                                               ll_kset.kobj);
641
642         if (sbi->ll_stats_track_type == type)
643                 return sprintf(buf, "%d\n", sbi->ll_stats_track_id);
644         else if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
645                 return sprintf(buf, "0 (all)\n");
646
647         return sprintf(buf, "untracked\n");
648 }
649
650 static ssize_t ll_wr_track_id(struct kobject *kobj, const char *buffer,
651                               size_t count, enum stats_track_type type)
652 {
653         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
654                                               ll_kset.kobj);
655         unsigned long pid;
656         int rc;
657
658         rc = kstrtoul(buffer, 10, &pid);
659         if (rc)
660                 return rc;
661
662         sbi->ll_stats_track_id = pid;
663         if (pid == 0)
664                 sbi->ll_stats_track_type = STATS_TRACK_ALL;
665         else
666                 sbi->ll_stats_track_type = type;
667         lprocfs_clear_stats(sbi->ll_stats);
668         return count;
669 }
670
671 static ssize_t stats_track_pid_show(struct kobject *kobj,
672                                     struct attribute *attr,
673                                     char *buf)
674 {
675         return ll_rd_track_id(kobj, buf, STATS_TRACK_PID);
676 }
677
678 static ssize_t stats_track_pid_store(struct kobject *kobj,
679                                      struct attribute *attr,
680                                      const char *buffer,
681                                      size_t count)
682 {
683         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_PID);
684 }
685 LUSTRE_RW_ATTR(stats_track_pid);
686
687 static ssize_t stats_track_ppid_show(struct kobject *kobj,
688                                      struct attribute *attr,
689                                      char *buf)
690 {
691         return ll_rd_track_id(kobj, buf, STATS_TRACK_PPID);
692 }
693
694 static ssize_t stats_track_ppid_store(struct kobject *kobj,
695                                       struct attribute *attr,
696                                       const char *buffer,
697                                       size_t count)
698 {
699         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_PPID);
700 }
701 LUSTRE_RW_ATTR(stats_track_ppid);
702
703 static ssize_t stats_track_gid_show(struct kobject *kobj,
704                                     struct attribute *attr,
705                                     char *buf)
706 {
707         return ll_rd_track_id(kobj, buf, STATS_TRACK_GID);
708 }
709
710 static ssize_t stats_track_gid_store(struct kobject *kobj,
711                                      struct attribute *attr,
712                                      const char *buffer,
713                                      size_t count)
714 {
715         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_GID);
716 }
717 LUSTRE_RW_ATTR(stats_track_gid);
718
719 static ssize_t statahead_running_max_show(struct kobject *kobj,
720                                           struct attribute *attr,
721                                           char *buf)
722 {
723         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
724                                               ll_kset.kobj);
725
726         return scnprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_sa_running_max);
727 }
728
729 static ssize_t statahead_running_max_store(struct kobject *kobj,
730                                            struct attribute *attr,
731                                            const char *buffer,
732                                            size_t count)
733 {
734         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
735                                               ll_kset.kobj);
736         unsigned long val;
737         int rc;
738
739         rc = kstrtoul(buffer, 0, &val);
740         if (rc)
741                 return rc;
742
743         if (val <= LL_SA_RUNNING_MAX) {
744                 sbi->ll_sa_running_max = val;
745                 return count;
746         }
747
748         CERROR("Bad statahead_running_max value %lu. Valid values "
749                "are in the range [0, %d]\n", val, LL_SA_RUNNING_MAX);
750
751         return -ERANGE;
752 }
753 LUSTRE_RW_ATTR(statahead_running_max);
754
755 static ssize_t statahead_max_show(struct kobject *kobj,
756                                   struct attribute *attr,
757                                   char *buf)
758 {
759         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
760                                               ll_kset.kobj);
761
762         return sprintf(buf, "%u\n", sbi->ll_sa_max);
763 }
764
765 static ssize_t statahead_max_store(struct kobject *kobj,
766                                    struct attribute *attr,
767                                    const char *buffer,
768                                    size_t count)
769 {
770         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
771                                               ll_kset.kobj);
772         unsigned long val;
773         int rc;
774
775         rc = kstrtoul(buffer, 0, &val);
776         if (rc)
777                 return rc;
778
779         if (val <= LL_SA_RPC_MAX)
780                 sbi->ll_sa_max = val;
781         else
782                 CERROR("Bad statahead_max value %lu. Valid values are in the range [0, %d]\n",
783                        val, LL_SA_RPC_MAX);
784
785         return count;
786 }
787 LUSTRE_RW_ATTR(statahead_max);
788
789 static ssize_t statahead_agl_show(struct kobject *kobj,
790                                   struct attribute *attr,
791                                   char *buf)
792 {
793         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
794                                               ll_kset.kobj);
795
796         return sprintf(buf, "%u\n", sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
797 }
798
799 static ssize_t statahead_agl_store(struct kobject *kobj,
800                                    struct attribute *attr,
801                                    const char *buffer,
802                                    size_t count)
803 {
804         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
805                                               ll_kset.kobj);
806         bool val;
807         int rc;
808
809         rc = kstrtobool(buffer, &val);
810         if (rc)
811                 return rc;
812
813         if (val)
814                 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
815         else
816                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
817
818         return count;
819 }
820 LUSTRE_RW_ATTR(statahead_agl);
821
822 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
823 {
824         struct super_block *sb = m->private;
825         struct ll_sb_info *sbi = ll_s2sbi(sb);
826
827         seq_printf(m, "statahead total: %u\n"
828                       "statahead wrong: %u\n"
829                       "agl total: %u\n",
830                    atomic_read(&sbi->ll_sa_total),
831                    atomic_read(&sbi->ll_sa_wrong),
832                    atomic_read(&sbi->ll_agl_total));
833         return 0;
834 }
835
836 LDEBUGFS_SEQ_FOPS_RO(ll_statahead_stats);
837
838 static ssize_t lazystatfs_show(struct kobject *kobj,
839                                struct attribute *attr,
840                                char *buf)
841 {
842         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
843                                               ll_kset.kobj);
844
845         return sprintf(buf, "%u\n", (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
846 }
847
848 static ssize_t lazystatfs_store(struct kobject *kobj,
849                                 struct attribute *attr,
850                                 const char *buffer,
851                                 size_t count)
852 {
853         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
854                                               ll_kset.kobj);
855         bool val;
856         int rc;
857
858         rc = kstrtobool(buffer, &val);
859         if (rc)
860                 return rc;
861
862         if (val)
863                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
864         else
865                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
866
867         return count;
868 }
869 LUSTRE_RW_ATTR(lazystatfs);
870
871 static ssize_t statfs_max_age_show(struct kobject *kobj, struct attribute *attr,
872                                    char *buf)
873 {
874         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
875                                               ll_kset.kobj);
876
877         return scnprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_statfs_max_age);
878 }
879
880 static ssize_t statfs_max_age_store(struct kobject *kobj,
881                                     struct attribute *attr, const char *buffer,
882                                     size_t count)
883 {
884         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
885                                               ll_kset.kobj);
886         unsigned int val;
887         int rc;
888
889         rc = kstrtouint(buffer, 10, &val);
890         if (rc)
891                 return rc;
892         if (val > OBD_STATFS_CACHE_MAX_AGE)
893                 return -EINVAL;
894
895         sbi->ll_statfs_max_age = val;
896
897         return count;
898 }
899 LUSTRE_RW_ATTR(statfs_max_age);
900
901 static ssize_t max_easize_show(struct kobject *kobj,
902                                struct attribute *attr,
903                                char *buf)
904 {
905         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
906                                               ll_kset.kobj);
907         unsigned int ealen;
908         int rc;
909
910         rc = ll_get_max_mdsize(sbi, &ealen);
911         if (rc)
912                 return rc;
913
914         /* Limit xattr size returned to userspace based on kernel maximum */
915         return scnprintf(buf, PAGE_SIZE, "%u\n",
916                          ealen > XATTR_SIZE_MAX ? XATTR_SIZE_MAX : ealen);
917 }
918 LUSTRE_RO_ATTR(max_easize);
919
920 /**
921  * Get default_easize.
922  *
923  * \see client_obd::cl_default_mds_easize
924  *
925  * \param[in] m         seq_file handle
926  * \param[in] v         unused for single entry
927  *
928  * \retval 0            on success
929  * \retval negative     negated errno on failure
930  */
931 static ssize_t default_easize_show(struct kobject *kobj,
932                                    struct attribute *attr,
933                                    char *buf)
934 {
935         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
936                                               ll_kset.kobj);
937         unsigned int ealen;
938         int rc;
939
940         rc = ll_get_default_mdsize(sbi, &ealen);
941         if (rc)
942                 return rc;
943
944         /* Limit xattr size returned to userspace based on kernel maximum */
945         return scnprintf(buf, PAGE_SIZE, "%u\n",
946                          ealen > XATTR_SIZE_MAX ? XATTR_SIZE_MAX : ealen);
947 }
948
949 /**
950  * Set default_easize.
951  *
952  * Range checking on the passed value is handled by
953  * ll_set_default_mdsize().
954  *
955  * \see client_obd::cl_default_mds_easize
956  *
957  * \param[in] file      proc file
958  * \param[in] buffer    string passed from user space
959  * \param[in] count     \a buffer length
960  * \param[in] off       unused for single entry
961  *
962  * \retval positive     \a count on success
963  * \retval negative     negated errno on failure
964  */
965 static ssize_t default_easize_store(struct kobject *kobj,
966                                     struct attribute *attr,
967                                     const char *buffer,
968                                     size_t count)
969 {
970         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
971                                               ll_kset.kobj);
972         unsigned int val;
973         int rc;
974
975         if (count == 0)
976                 return 0;
977
978         rc = kstrtouint(buffer, 10, &val);
979         if (rc)
980                 return rc;
981
982         rc = ll_set_default_mdsize(sbi, val);
983         if (rc)
984                 return rc;
985
986         return count;
987 }
988 LUSTRE_RW_ATTR(default_easize);
989
990 static int ll_sbi_flags_seq_show(struct seq_file *m, void *v)
991 {
992         const char *const str[] = LL_SBI_FLAGS;
993         struct super_block *sb = m->private;
994         int flags = ll_s2sbi(sb)->ll_flags;
995         int i = 0;
996
997         while (flags != 0) {
998                 if (ARRAY_SIZE(str) <= i) {
999                         CERROR("%s: Revise array LL_SBI_FLAGS to match sbi "
1000                                 "flags please.\n", ll_s2sbi(sb)->ll_fsname);
1001                         return -EINVAL;
1002                 }
1003
1004                 if (flags & 0x1)
1005                         seq_printf(m, "%s ", str[i]);
1006                 flags >>= 1;
1007                 ++i;
1008         }
1009         seq_printf(m, "\b\n");
1010         return 0;
1011 }
1012
1013 LDEBUGFS_SEQ_FOPS_RO(ll_sbi_flags);
1014
1015 static ssize_t xattr_cache_show(struct kobject *kobj,
1016                                 struct attribute *attr,
1017                                 char *buf)
1018 {
1019         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1020                                               ll_kset.kobj);
1021
1022         return sprintf(buf, "%u\n", sbi->ll_xattr_cache_enabled);
1023 }
1024
1025 static ssize_t xattr_cache_store(struct kobject *kobj,
1026                                  struct attribute *attr,
1027                                  const char *buffer,
1028                                  size_t count)
1029 {
1030         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1031                                               ll_kset.kobj);
1032         bool val;
1033         int rc;
1034
1035         rc = kstrtobool(buffer, &val);
1036         if (rc)
1037                 return rc;
1038
1039         if (val && !(sbi->ll_flags & LL_SBI_XATTR_CACHE))
1040                 return -ENOTSUPP;
1041
1042         sbi->ll_xattr_cache_enabled = val;
1043         sbi->ll_xattr_cache_set = 1;
1044
1045         return count;
1046 }
1047 LUSTRE_RW_ATTR(xattr_cache);
1048
1049 static ssize_t tiny_write_show(struct kobject *kobj,
1050                                struct attribute *attr,
1051                                char *buf)
1052 {
1053         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1054                                               ll_kset.kobj);
1055
1056         return sprintf(buf, "%u\n", !!(sbi->ll_flags & LL_SBI_TINY_WRITE));
1057 }
1058
1059 static ssize_t tiny_write_store(struct kobject *kobj,
1060                                 struct attribute *attr,
1061                                 const char *buffer,
1062                                 size_t count)
1063 {
1064         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1065                                               ll_kset.kobj);
1066         bool val;
1067         int rc;
1068
1069         rc = kstrtobool(buffer, &val);
1070         if (rc)
1071                 return rc;
1072
1073         spin_lock(&sbi->ll_lock);
1074         if (val)
1075                 sbi->ll_flags |= LL_SBI_TINY_WRITE;
1076         else
1077                 sbi->ll_flags &= ~LL_SBI_TINY_WRITE;
1078         spin_unlock(&sbi->ll_lock);
1079
1080         return count;
1081 }
1082 LUSTRE_RW_ATTR(tiny_write);
1083
1084 static ssize_t max_read_ahead_async_active_show(struct kobject *kobj,
1085                                                struct attribute *attr,
1086                                                char *buf)
1087 {
1088         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1089                                               ll_kset.kobj);
1090
1091         return scnprintf(buf, PAGE_SIZE, "%u\n",
1092                          sbi->ll_ra_info.ra_async_max_active);
1093 }
1094
1095 static ssize_t max_read_ahead_async_active_store(struct kobject *kobj,
1096                                                  struct attribute *attr,
1097                                                  const char *buffer,
1098                                                  size_t count)
1099 {
1100         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1101                                               ll_kset.kobj);
1102         unsigned int val;
1103         int rc;
1104
1105         rc = kstrtouint(buffer, 10, &val);
1106         if (rc)
1107                 return rc;
1108
1109         /**
1110          * It doesn't make any sense to make it exceed what
1111          * workqueue could acutally support. This can easily
1112          * over subscripe the cores but Lustre internally
1113          * throttles to avoid those impacts.
1114          */
1115         if (val > WQ_UNBOUND_MAX_ACTIVE) {
1116                 CERROR("%s: cannot set max_read_ahead_async_active=%u larger than %u\n",
1117                        sbi->ll_fsname, val, WQ_UNBOUND_MAX_ACTIVE);
1118                 return -ERANGE;
1119         }
1120
1121         spin_lock(&sbi->ll_lock);
1122         sbi->ll_ra_info.ra_async_max_active = val;
1123         spin_unlock(&sbi->ll_lock);
1124
1125         return count;
1126 }
1127 LUSTRE_RW_ATTR(max_read_ahead_async_active);
1128
1129 static ssize_t read_ahead_async_file_threshold_mb_show(struct kobject *kobj,
1130                                                        struct attribute *attr,
1131                                                        char *buf)
1132 {
1133         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1134                                               ll_kset.kobj);
1135
1136         return scnprintf(buf, PAGE_SIZE, "%lu\n", PAGES_TO_MiB(
1137                          sbi->ll_ra_info.ra_async_pages_per_file_threshold));
1138 }
1139
1140 static ssize_t
1141 read_ahead_async_file_threshold_mb_store(struct kobject *kobj,
1142                                          struct attribute *attr,
1143                                          const char *buffer, size_t count)
1144 {
1145         unsigned long pages_number;
1146         unsigned long max_ra_per_file;
1147         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1148                                               ll_kset.kobj);
1149         int rc;
1150
1151         rc = kstrtoul(buffer, 10, &pages_number);
1152         if (rc)
1153                 return rc;
1154
1155         pages_number = MiB_TO_PAGES(pages_number);
1156         max_ra_per_file = sbi->ll_ra_info.ra_max_pages_per_file;
1157         if (pages_number < 0 || pages_number > max_ra_per_file) {
1158                 CERROR("%s: can't set read_ahead_async_file_threshold_mb=%lu > "
1159                        "max_read_readahead_per_file_mb=%lu\n", sbi->ll_fsname,
1160                        PAGES_TO_MiB(pages_number),
1161                        PAGES_TO_MiB(max_ra_per_file));
1162                 return -ERANGE;
1163         }
1164         sbi->ll_ra_info.ra_async_pages_per_file_threshold = pages_number;
1165
1166         return count;
1167 }
1168 LUSTRE_RW_ATTR(read_ahead_async_file_threshold_mb);
1169
1170 static ssize_t read_ahead_range_kb_show(struct kobject *kobj,
1171                                         struct attribute *attr,char *buf)
1172 {
1173         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1174                                               ll_kset.kobj);
1175
1176         return snprintf(buf, PAGE_SIZE, "%lu\n",
1177                         sbi->ll_ra_info.ra_range_pages << (PAGE_SHIFT - 10));
1178 }
1179
1180 static ssize_t
1181 read_ahead_range_kb_store(struct kobject *kobj,
1182                                struct attribute *attr,
1183                                const char *buffer, size_t count)
1184 {
1185         unsigned long pages_number;
1186         unsigned long max_ra_per_file;
1187         u64 val;
1188         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1189                                               ll_kset.kobj);
1190         int rc;
1191
1192         rc = sysfs_memparse(buffer, count, &val, "KiB");
1193         if (rc < 0)
1194                 return rc;
1195
1196         pages_number = val >> PAGE_SHIFT;
1197         /* Disable mmap range read */
1198         if (pages_number == 0)
1199                 goto out;
1200
1201         max_ra_per_file = sbi->ll_ra_info.ra_max_pages_per_file;
1202         if (pages_number > max_ra_per_file ||
1203             pages_number < RA_MIN_MMAP_RANGE_PAGES)
1204                 return -ERANGE;
1205
1206 out:
1207         spin_lock(&sbi->ll_lock);
1208         sbi->ll_ra_info.ra_range_pages = pages_number;
1209         spin_unlock(&sbi->ll_lock);
1210
1211         return count;
1212 }
1213 LUSTRE_RW_ATTR(read_ahead_range_kb);
1214
1215 static ssize_t fast_read_show(struct kobject *kobj,
1216                               struct attribute *attr,
1217                               char *buf)
1218 {
1219         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1220                                               ll_kset.kobj);
1221
1222         return sprintf(buf, "%u\n", !!(sbi->ll_flags & LL_SBI_FAST_READ));
1223 }
1224
1225 static ssize_t fast_read_store(struct kobject *kobj,
1226                                struct attribute *attr,
1227                                const char *buffer,
1228                                size_t count)
1229 {
1230         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1231                                               ll_kset.kobj);
1232         bool val;
1233         int rc;
1234
1235         rc = kstrtobool(buffer, &val);
1236         if (rc)
1237                 return rc;
1238
1239         spin_lock(&sbi->ll_lock);
1240         if (val)
1241                 sbi->ll_flags |= LL_SBI_FAST_READ;
1242         else
1243                 sbi->ll_flags &= ~LL_SBI_FAST_READ;
1244         spin_unlock(&sbi->ll_lock);
1245
1246         return count;
1247 }
1248 LUSTRE_RW_ATTR(fast_read);
1249
1250 static ssize_t file_heat_show(struct kobject *kobj,
1251                               struct attribute *attr,
1252                               char *buf)
1253 {
1254         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1255                                               ll_kset.kobj);
1256
1257         return scnprintf(buf, PAGE_SIZE, "%u\n",
1258                          !!(sbi->ll_flags & LL_SBI_FILE_HEAT));
1259 }
1260
1261 static ssize_t file_heat_store(struct kobject *kobj,
1262                                struct attribute *attr,
1263                                const char *buffer,
1264                                size_t count)
1265 {
1266         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1267                                               ll_kset.kobj);
1268         bool val;
1269         int rc;
1270
1271         rc = kstrtobool(buffer, &val);
1272         if (rc)
1273                 return rc;
1274
1275         spin_lock(&sbi->ll_lock);
1276         if (val)
1277                 sbi->ll_flags |= LL_SBI_FILE_HEAT;
1278         else
1279                 sbi->ll_flags &= ~LL_SBI_FILE_HEAT;
1280         spin_unlock(&sbi->ll_lock);
1281
1282         return count;
1283 }
1284 LUSTRE_RW_ATTR(file_heat);
1285
1286 static ssize_t heat_decay_percentage_show(struct kobject *kobj,
1287                                           struct attribute *attr,
1288                                           char *buf)
1289 {
1290         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1291                                               ll_kset.kobj);
1292
1293         return scnprintf(buf, PAGE_SIZE, "%u\n",
1294                          (sbi->ll_heat_decay_weight * 100 + 128) / 256);
1295 }
1296
1297 static ssize_t heat_decay_percentage_store(struct kobject *kobj,
1298                                            struct attribute *attr,
1299                                            const char *buffer,
1300                                            size_t count)
1301 {
1302         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1303                                               ll_kset.kobj);
1304         unsigned long val;
1305         int rc;
1306
1307         rc = kstrtoul(buffer, 10, &val);
1308         if (rc)
1309                 return rc;
1310
1311         if (val < 0 || val > 100)
1312                 return -ERANGE;
1313
1314         sbi->ll_heat_decay_weight = (val * 256 + 50) / 100;
1315
1316         return count;
1317 }
1318 LUSTRE_RW_ATTR(heat_decay_percentage);
1319
1320 static ssize_t heat_period_second_show(struct kobject *kobj,
1321                                        struct attribute *attr,
1322                                        char *buf)
1323 {
1324         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1325                                               ll_kset.kobj);
1326
1327         return scnprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_heat_period_second);
1328 }
1329
1330 static ssize_t heat_period_second_store(struct kobject *kobj,
1331                                         struct attribute *attr,
1332                                         const char *buffer,
1333                                         size_t count)
1334 {
1335         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1336                                               ll_kset.kobj);
1337         unsigned long val;
1338         int rc;
1339
1340         rc = kstrtoul(buffer, 10, &val);
1341         if (rc)
1342                 return rc;
1343
1344         if (val <= 0)
1345                 return -ERANGE;
1346
1347         sbi->ll_heat_period_second = val;
1348
1349         return count;
1350 }
1351 LUSTRE_RW_ATTR(heat_period_second);
1352
1353 static int ll_unstable_stats_seq_show(struct seq_file *m, void *v)
1354 {
1355         struct super_block      *sb    = m->private;
1356         struct ll_sb_info       *sbi   = ll_s2sbi(sb);
1357         struct cl_client_cache  *cache = sbi->ll_cache;
1358         long pages;
1359         int mb;
1360
1361         pages = atomic_long_read(&cache->ccc_unstable_nr);
1362         mb    = (pages * PAGE_SIZE) >> 20;
1363
1364         seq_printf(m, "unstable_check:     %8d\n"
1365                       "unstable_pages: %12ld\n"
1366                       "unstable_mb:        %8d\n",
1367                    cache->ccc_unstable_check, pages, mb);
1368         return 0;
1369 }
1370
1371 static ssize_t ll_unstable_stats_seq_write(struct file *file,
1372                                            const char __user *buffer,
1373                                            size_t count, loff_t *unused)
1374 {
1375         struct seq_file *seq = file->private_data;
1376         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)seq->private);
1377         char kernbuf[128];
1378         bool val;
1379         int rc;
1380
1381         if (count == 0)
1382                 return 0;
1383         if (count >= sizeof(kernbuf))
1384                 return -EINVAL;
1385
1386         if (copy_from_user(kernbuf, buffer, count))
1387                 return -EFAULT;
1388         kernbuf[count] = 0;
1389
1390         buffer += lprocfs_find_named_value(kernbuf, "unstable_check:", &count) -
1391                   kernbuf;
1392         rc = kstrtobool_from_user(buffer, count, &val);
1393         if (rc < 0)
1394                 return rc;
1395
1396         /* borrow lru lock to set the value */
1397         spin_lock(&sbi->ll_cache->ccc_lru_lock);
1398         sbi->ll_cache->ccc_unstable_check = val;
1399         spin_unlock(&sbi->ll_cache->ccc_lru_lock);
1400
1401         return count;
1402 }
1403
1404 LDEBUGFS_SEQ_FOPS(ll_unstable_stats);
1405
1406 static int ll_root_squash_seq_show(struct seq_file *m, void *v)
1407 {
1408         struct super_block *sb = m->private;
1409         struct ll_sb_info *sbi = ll_s2sbi(sb);
1410         struct root_squash_info *squash = &sbi->ll_squash;
1411
1412         seq_printf(m, "%u:%u\n", squash->rsi_uid, squash->rsi_gid);
1413         return 0;
1414 }
1415
1416 static ssize_t ll_root_squash_seq_write(struct file *file,
1417                                         const char __user *buffer,
1418                                         size_t count, loff_t *off)
1419 {
1420         struct seq_file *m = file->private_data;
1421         struct super_block *sb = m->private;
1422         struct ll_sb_info *sbi = ll_s2sbi(sb);
1423         struct root_squash_info *squash = &sbi->ll_squash;
1424
1425         return lprocfs_wr_root_squash(buffer, count, squash, sbi->ll_fsname);
1426 }
1427
1428 LDEBUGFS_SEQ_FOPS(ll_root_squash);
1429
1430 static int ll_nosquash_nids_seq_show(struct seq_file *m, void *v)
1431 {
1432         struct super_block *sb = m->private;
1433         struct ll_sb_info *sbi = ll_s2sbi(sb);
1434         struct root_squash_info *squash = &sbi->ll_squash;
1435         int len;
1436
1437         spin_lock(&squash->rsi_lock);
1438         if (!list_empty(&squash->rsi_nosquash_nids)) {
1439                 len = cfs_print_nidlist(m->buf + m->count, m->size - m->count,
1440                                         &squash->rsi_nosquash_nids);
1441                 m->count += len;
1442                 seq_putc(m, '\n');
1443         } else {
1444                 seq_puts(m, "NONE\n");
1445         }
1446         spin_unlock(&squash->rsi_lock);
1447
1448         return 0;
1449 }
1450
1451 static ssize_t ll_nosquash_nids_seq_write(struct file *file,
1452                                           const char __user *buffer,
1453                                           size_t count, loff_t *off)
1454 {
1455         struct seq_file *m = file->private_data;
1456         struct super_block *sb = m->private;
1457         struct ll_sb_info *sbi = ll_s2sbi(sb);
1458         struct root_squash_info *squash = &sbi->ll_squash;
1459         int rc;
1460
1461         rc = lprocfs_wr_nosquash_nids(buffer, count, squash, sbi->ll_fsname);
1462         if (rc < 0)
1463                 return rc;
1464
1465         ll_compute_rootsquash_state(sbi);
1466
1467         return rc;
1468 }
1469
1470 LDEBUGFS_SEQ_FOPS(ll_nosquash_nids);
1471
1472 static int ll_pcc_seq_show(struct seq_file *m, void *v)
1473 {
1474         struct super_block *sb = m->private;
1475         struct ll_sb_info *sbi = ll_s2sbi(sb);
1476
1477         return pcc_super_dump(&sbi->ll_pcc_super, m);
1478 }
1479
1480 static ssize_t ll_pcc_seq_write(struct file *file, const char __user *buffer,
1481                                 size_t count, loff_t *off)
1482 {
1483         struct seq_file *m = file->private_data;
1484         struct super_block *sb = m->private;
1485         struct ll_sb_info *sbi = ll_s2sbi(sb);
1486         int rc;
1487         char *kernbuf;
1488
1489         if (count >= LPROCFS_WR_PCC_MAX_CMD)
1490                 return -EINVAL;
1491
1492         if (!(exp_connect_flags2(sbi->ll_md_exp) & OBD_CONNECT2_PCC))
1493                 return -EOPNOTSUPP;
1494
1495         OBD_ALLOC(kernbuf, count + 1);
1496         if (kernbuf == NULL)
1497                 return -ENOMEM;
1498
1499         if (copy_from_user(kernbuf, buffer, count))
1500                 GOTO(out_free_kernbuff, rc = -EFAULT);
1501
1502         rc = pcc_cmd_handle(kernbuf, count, &sbi->ll_pcc_super);
1503 out_free_kernbuff:
1504         OBD_FREE(kernbuf, count + 1);
1505         return rc ? rc : count;
1506 }
1507 LDEBUGFS_SEQ_FOPS(ll_pcc);
1508
1509 struct ldebugfs_vars lprocfs_llite_obd_vars[] = {
1510         { .name =       "site",
1511           .fops =       &ll_site_stats_fops                     },
1512         { .name =       "max_cached_mb",
1513           .fops =       &ll_max_cached_mb_fops                  },
1514         { .name =       "statahead_stats",
1515           .fops =       &ll_statahead_stats_fops                },
1516         { .name =       "unstable_stats",
1517           .fops =       &ll_unstable_stats_fops                 },
1518         { .name =       "sbi_flags",
1519           .fops =       &ll_sbi_flags_fops                      },
1520         { .name =       "root_squash",
1521           .fops =       &ll_root_squash_fops                    },
1522         { .name =       "nosquash_nids",
1523           .fops =       &ll_nosquash_nids_fops                  },
1524         { .name =       "pcc",
1525           .fops =       &ll_pcc_fops,                           },
1526         { NULL }
1527 };
1528
1529 #define MAX_STRING_SIZE 128
1530
1531 static struct attribute *llite_attrs[] = {
1532         &lustre_attr_blocksize.attr,
1533         &lustre_attr_stat_blocksize.attr,
1534         &lustre_attr_kbytestotal.attr,
1535         &lustre_attr_kbytesfree.attr,
1536         &lustre_attr_kbytesavail.attr,
1537         &lustre_attr_filestotal.attr,
1538         &lustre_attr_filesfree.attr,
1539         &lustre_attr_client_type.attr,
1540         &lustre_attr_foreign_symlink_enable.attr,
1541         &lustre_attr_foreign_symlink_prefix.attr,
1542         &lustre_attr_foreign_symlink_upcall.attr,
1543         &lustre_attr_foreign_symlink_upcall_info.attr,
1544         &lustre_attr_fstype.attr,
1545         &lustre_attr_uuid.attr,
1546         &lustre_attr_checksums.attr,
1547         &lustre_attr_checksum_pages.attr,
1548         &lustre_attr_max_read_ahead_mb.attr,
1549         &lustre_attr_max_read_ahead_per_file_mb.attr,
1550         &lustre_attr_max_read_ahead_whole_mb.attr,
1551         &lustre_attr_max_read_ahead_async_active.attr,
1552         &lustre_attr_read_ahead_async_file_threshold_mb.attr,
1553         &lustre_attr_read_ahead_range_kb.attr,
1554         &lustre_attr_stats_track_pid.attr,
1555         &lustre_attr_stats_track_ppid.attr,
1556         &lustre_attr_stats_track_gid.attr,
1557         &lustre_attr_statahead_running_max.attr,
1558         &lustre_attr_statahead_max.attr,
1559         &lustre_attr_statahead_agl.attr,
1560         &lustre_attr_lazystatfs.attr,
1561         &lustre_attr_statfs_max_age.attr,
1562         &lustre_attr_max_easize.attr,
1563         &lustre_attr_default_easize.attr,
1564         &lustre_attr_xattr_cache.attr,
1565         &lustre_attr_fast_read.attr,
1566         &lustre_attr_tiny_write.attr,
1567         &lustre_attr_file_heat.attr,
1568         &lustre_attr_heat_decay_percentage.attr,
1569         &lustre_attr_heat_period_second.attr,
1570         NULL,
1571 };
1572
1573 static void sbi_kobj_release(struct kobject *kobj)
1574 {
1575         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1576                                               ll_kset.kobj);
1577         complete(&sbi->ll_kobj_unregister);
1578 }
1579
1580 static struct kobj_type sbi_ktype = {
1581         .default_attrs  = llite_attrs,
1582         .sysfs_ops      = &lustre_sysfs_ops,
1583         .release        = sbi_kobj_release,
1584 };
1585
1586 static const struct llite_file_opcode {
1587         __u32           opcode;
1588         __u32           type;
1589         const char      *opname;
1590 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
1591         /* file operation */
1592         { LPROC_LL_READ_BYTES,  LPROCFS_TYPE_BYTES_FULL, "read_bytes" },
1593         { LPROC_LL_WRITE_BYTES, LPROCFS_TYPE_BYTES_FULL, "write_bytes" },
1594         { LPROC_LL_READ,        LPROCFS_TYPE_LATENCY,   "read" },
1595         { LPROC_LL_WRITE,       LPROCFS_TYPE_LATENCY,   "write" },
1596         { LPROC_LL_IOCTL,       LPROCFS_TYPE_REQS,      "ioctl" },
1597         { LPROC_LL_OPEN,        LPROCFS_TYPE_LATENCY,   "open" },
1598         { LPROC_LL_RELEASE,     LPROCFS_TYPE_LATENCY,   "close" },
1599         { LPROC_LL_MMAP,        LPROCFS_TYPE_LATENCY,   "mmap" },
1600         { LPROC_LL_FAULT,       LPROCFS_TYPE_LATENCY,   "page_fault" },
1601         { LPROC_LL_MKWRITE,     LPROCFS_TYPE_LATENCY,   "page_mkwrite" },
1602         { LPROC_LL_LLSEEK,      LPROCFS_TYPE_LATENCY,   "seek" },
1603         { LPROC_LL_FSYNC,       LPROCFS_TYPE_LATENCY,   "fsync" },
1604         { LPROC_LL_READDIR,     LPROCFS_TYPE_LATENCY,   "readdir" },
1605         /* inode operation */
1606         { LPROC_LL_SETATTR,     LPROCFS_TYPE_LATENCY,   "setattr" },
1607         { LPROC_LL_TRUNC,       LPROCFS_TYPE_LATENCY,   "truncate" },
1608         { LPROC_LL_FLOCK,       LPROCFS_TYPE_LATENCY,   "flock" },
1609         { LPROC_LL_GETATTR,     LPROCFS_TYPE_LATENCY,   "getattr" },
1610         { LPROC_LL_FALLOCATE,   LPROCFS_TYPE_LATENCY, "fallocate"},
1611         /* dir inode operation */
1612         { LPROC_LL_CREATE,      LPROCFS_TYPE_LATENCY,   "create" },
1613         { LPROC_LL_LINK,        LPROCFS_TYPE_LATENCY,   "link" },
1614         { LPROC_LL_UNLINK,      LPROCFS_TYPE_LATENCY,   "unlink" },
1615         { LPROC_LL_SYMLINK,     LPROCFS_TYPE_LATENCY,   "symlink" },
1616         { LPROC_LL_MKDIR,       LPROCFS_TYPE_LATENCY,   "mkdir" },
1617         { LPROC_LL_RMDIR,       LPROCFS_TYPE_LATENCY,   "rmdir" },
1618         { LPROC_LL_MKNOD,       LPROCFS_TYPE_LATENCY,   "mknod" },
1619         { LPROC_LL_RENAME,      LPROCFS_TYPE_LATENCY,   "rename" },
1620         /* special inode operation */
1621         { LPROC_LL_STATFS,      LPROCFS_TYPE_LATENCY,   "statfs" },
1622         { LPROC_LL_SETXATTR,    LPROCFS_TYPE_LATENCY,   "setxattr" },
1623         { LPROC_LL_GETXATTR,    LPROCFS_TYPE_LATENCY,   "getxattr" },
1624         { LPROC_LL_GETXATTR_HITS, LPROCFS_TYPE_REQS,    "getxattr_hits" },
1625         { LPROC_LL_LISTXATTR,   LPROCFS_TYPE_LATENCY,   "listxattr" },
1626         { LPROC_LL_REMOVEXATTR, LPROCFS_TYPE_LATENCY,   "removexattr" },
1627         { LPROC_LL_INODE_PERM,  LPROCFS_TYPE_LATENCY,   "inode_permission" },
1628 };
1629
1630 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, long count)
1631 {
1632         if (!sbi->ll_stats)
1633                 return;
1634
1635         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
1636                 lprocfs_counter_add(sbi->ll_stats, op, count);
1637         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
1638                  sbi->ll_stats_track_id == current->pid)
1639                 lprocfs_counter_add(sbi->ll_stats, op, count);
1640         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
1641                  sbi->ll_stats_track_id == current->parent->pid)
1642                 lprocfs_counter_add(sbi->ll_stats, op, count);
1643         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
1644                  sbi->ll_stats_track_id ==
1645                         from_kgid(&init_user_ns, current_gid()))
1646                 lprocfs_counter_add(sbi->ll_stats, op, count);
1647 }
1648 EXPORT_SYMBOL(ll_stats_ops_tally);
1649
1650 static const char *const ra_stat_string[] = {
1651         [RA_STAT_HIT] = "hits",
1652         [RA_STAT_MISS] = "misses",
1653         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
1654         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
1655         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
1656         [RA_STAT_FAILED_MATCH] = "failed lock match",
1657         [RA_STAT_DISCARDED] = "read but discarded",
1658         [RA_STAT_ZERO_LEN] = "zero length file",
1659         [RA_STAT_ZERO_WINDOW] = "zero size window",
1660         [RA_STAT_EOF] = "read-ahead to EOF",
1661         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
1662         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
1663         [RA_STAT_FAILED_REACH_END] = "failed to reach end",
1664         [RA_STAT_ASYNC] = "async readahead",
1665         [RA_STAT_FAILED_FAST_READ] = "failed to fast read",
1666         [RA_STAT_MMAP_RANGE_READ] = "mmap range read",
1667 };
1668
1669 int ll_debugfs_register_super(struct super_block *sb, const char *name)
1670 {
1671         struct lustre_sb_info *lsi = s2lsi(sb);
1672         struct ll_sb_info *sbi = ll_s2sbi(sb);
1673         int err, id;
1674
1675         ENTRY;
1676         LASSERT(sbi);
1677
1678         if (IS_ERR_OR_NULL(llite_root))
1679                 goto out_ll_kset;
1680
1681         sbi->ll_debugfs_entry = debugfs_create_dir(name, llite_root);
1682         ldebugfs_add_vars(sbi->ll_debugfs_entry, lprocfs_llite_obd_vars, sb);
1683
1684         debugfs_create_file("dump_page_cache", 0444, sbi->ll_debugfs_entry, sbi,
1685                             &vvp_dump_pgcache_file_ops);
1686
1687         debugfs_create_file("extents_stats", 0644, sbi->ll_debugfs_entry, sbi,
1688                                  &ll_rw_extents_stats_fops);
1689
1690         debugfs_create_file("extents_stats_per_process", 0644,
1691                             sbi->ll_debugfs_entry, sbi,
1692                             &ll_rw_extents_stats_pp_fops);
1693
1694         debugfs_create_file("offset_stats", 0644, sbi->ll_debugfs_entry, sbi,
1695                             &ll_rw_offset_stats_fops);
1696
1697         /* File operations stats */
1698         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
1699                                             LPROCFS_STATS_FLAG_NONE);
1700         if (sbi->ll_stats == NULL)
1701                 GOTO(out_debugfs, err = -ENOMEM);
1702
1703         /* do counter init */
1704         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
1705                 u32 type = llite_opcode_table[id].type;
1706                 void *ptr = "unknown";
1707
1708                 if (type & LPROCFS_TYPE_REQS)
1709                         ptr = "reqs";
1710                 else if (type & LPROCFS_TYPE_BYTES)
1711                         ptr = "bytes";
1712                 else if (type & LPROCFS_TYPE_USEC)
1713                         ptr = "usec";
1714                 lprocfs_counter_init(sbi->ll_stats,
1715                                      llite_opcode_table[id].opcode, type,
1716                                      llite_opcode_table[id].opname, ptr);
1717         }
1718
1719         debugfs_create_file("stats", 0644, sbi->ll_debugfs_entry,
1720                             sbi->ll_stats, &ldebugfs_stats_seq_fops);
1721
1722         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
1723                                                LPROCFS_STATS_FLAG_NONE);
1724         if (sbi->ll_ra_stats == NULL)
1725                 GOTO(out_stats, err = -ENOMEM);
1726
1727         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
1728                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
1729                                      ra_stat_string[id], "pages");
1730
1731         debugfs_create_file("read_ahead_stats", 0644, sbi->ll_debugfs_entry,
1732                             sbi->ll_ra_stats, &ldebugfs_stats_seq_fops);
1733
1734 out_ll_kset:
1735         /* Yes we also register sysfs mount kset here as well */
1736         sbi->ll_kset.kobj.parent = llite_kobj;
1737         sbi->ll_kset.kobj.ktype = &sbi_ktype;
1738         init_completion(&sbi->ll_kobj_unregister);
1739         err = kobject_set_name(&sbi->ll_kset.kobj, "%s", name);
1740         if (err)
1741                 GOTO(out_ra_stats, err);
1742
1743         err = kset_register(&sbi->ll_kset);
1744         if (err)
1745                 GOTO(out_ra_stats, err);
1746
1747         lsi->lsi_kobj = kobject_get(&sbi->ll_kset.kobj);
1748
1749         RETURN(0);
1750 out_ra_stats:
1751         lprocfs_free_stats(&sbi->ll_ra_stats);
1752 out_stats:
1753         lprocfs_free_stats(&sbi->ll_stats);
1754 out_debugfs:
1755         debugfs_remove_recursive(sbi->ll_debugfs_entry);
1756
1757         RETURN(err);
1758 }
1759
1760 void ll_debugfs_unregister_super(struct super_block *sb)
1761 {
1762         struct lustre_sb_info *lsi = s2lsi(sb);
1763         struct ll_sb_info *sbi = ll_s2sbi(sb);
1764
1765         debugfs_remove_recursive(sbi->ll_debugfs_entry);
1766
1767         if (sbi->ll_dt_obd)
1768                 sysfs_remove_link(&sbi->ll_kset.kobj,
1769                                   sbi->ll_dt_obd->obd_type->typ_name);
1770
1771         if (sbi->ll_md_obd)
1772                 sysfs_remove_link(&sbi->ll_kset.kobj,
1773                                   sbi->ll_md_obd->obd_type->typ_name);
1774
1775         kobject_put(lsi->lsi_kobj);
1776
1777         kset_unregister(&sbi->ll_kset);
1778         wait_for_completion(&sbi->ll_kobj_unregister);
1779
1780         lprocfs_free_stats(&sbi->ll_ra_stats);
1781         lprocfs_free_stats(&sbi->ll_stats);
1782 }
1783 #undef MAX_STRING_SIZE
1784
1785 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1786                                    struct seq_file *seq, int which)
1787 {
1788         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1789         unsigned long start, end, r, w;
1790         char *unitp = "KMGTPEZY";
1791         int i, units = 10;
1792         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1793
1794         read_cum = 0;
1795         write_cum = 0;
1796         start = 0;
1797
1798         for(i = 0; i < LL_HIST_MAX; i++) {
1799                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1800                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1801         }
1802
1803         for(i = 0; i < LL_HIST_MAX; i++) {
1804                 r = pp_info->pp_r_hist.oh_buckets[i];
1805                 w = pp_info->pp_w_hist.oh_buckets[i];
1806                 read_cum += r;
1807                 write_cum += w;
1808                 end = 1 << (i + LL_HIST_START - units);
1809                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4u %4u  | "
1810                            "%14lu %4u %4u\n", start, *unitp, end, *unitp,
1811                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1812                            r, pct(r, read_tot), pct(read_cum, read_tot),
1813                            w, pct(w, write_tot), pct(write_cum, write_tot));
1814                 start = end;
1815                 if (start == (1 << 10)) {
1816                         start = 1;
1817                         units += 10;
1818                         unitp++;
1819                 }
1820                 if (read_cum == read_tot && write_cum == write_tot)
1821                         break;
1822         }
1823 }
1824
1825 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1826 {
1827         struct timespec64 now;
1828         struct ll_sb_info *sbi = seq->private;
1829         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1830         int k;
1831
1832         ktime_get_real_ts64(&now);
1833
1834         if (!sbi->ll_rw_stats_on) {
1835                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
1836                 return 0;
1837         }
1838         seq_printf(seq, "snapshot_time:         %llu.%09lu (secs.nsecs)\n",
1839                    (s64)now.tv_sec, now.tv_nsec);
1840         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1841         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1842                    "extents", "calls", "%", "cum%",
1843                    "calls", "%", "cum%");
1844         spin_lock(&sbi->ll_pp_extent_lock);
1845         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1846                 if (io_extents->pp_extents[k].pid != 0) {
1847                         seq_printf(seq, "\nPID: %d\n",
1848                                    io_extents->pp_extents[k].pid);
1849                         ll_display_extents_info(io_extents, seq, k);
1850                 }
1851         }
1852         spin_unlock(&sbi->ll_pp_extent_lock);
1853         return 0;
1854 }
1855
1856 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1857                                                 const char __user *buf,
1858                                                 size_t len,
1859                                                 loff_t *off)
1860 {
1861         struct seq_file *seq = file->private_data;
1862         struct ll_sb_info *sbi = seq->private;
1863         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1864         int i;
1865         __s64 value;
1866
1867         if (len == 0)
1868                 return -EINVAL;
1869
1870         value = ll_stats_pid_write(buf, len);
1871
1872         if (value == 0)
1873                 sbi->ll_rw_stats_on = 0;
1874         else
1875                 sbi->ll_rw_stats_on = 1;
1876
1877         spin_lock(&sbi->ll_pp_extent_lock);
1878         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1879                 io_extents->pp_extents[i].pid = 0;
1880                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1881                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1882         }
1883         spin_unlock(&sbi->ll_pp_extent_lock);
1884         return len;
1885 }
1886
1887 LDEBUGFS_SEQ_FOPS(ll_rw_extents_stats_pp);
1888
1889 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1890 {
1891         struct timespec64 now;
1892         struct ll_sb_info *sbi = seq->private;
1893         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1894
1895         ktime_get_real_ts64(&now);
1896
1897         if (!sbi->ll_rw_stats_on) {
1898                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
1899                 return 0;
1900         }
1901         seq_printf(seq, "snapshot_time:         %llu.%09lu (secs.nsecs)\n",
1902                    (s64)now.tv_sec, now.tv_nsec);
1903
1904         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1905         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1906                    "extents", "calls", "%", "cum%",
1907                    "calls", "%", "cum%");
1908         spin_lock(&sbi->ll_lock);
1909         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1910         spin_unlock(&sbi->ll_lock);
1911
1912         return 0;
1913 }
1914
1915 static ssize_t ll_rw_extents_stats_seq_write(struct file *file,
1916                                              const char __user *buf,
1917                                              size_t len, loff_t *off)
1918 {
1919         struct seq_file *seq = file->private_data;
1920         struct ll_sb_info *sbi = seq->private;
1921         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1922         int i;
1923         __s64 value;
1924
1925         if (len == 0)
1926                 return -EINVAL;
1927
1928         value = ll_stats_pid_write(buf, len);
1929
1930         if (value == 0)
1931                 sbi->ll_rw_stats_on = 0;
1932         else
1933                 sbi->ll_rw_stats_on = 1;
1934
1935         spin_lock(&sbi->ll_pp_extent_lock);
1936         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1937                 io_extents->pp_extents[i].pid = 0;
1938                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1939                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1940         }
1941         spin_unlock(&sbi->ll_pp_extent_lock);
1942
1943         return len;
1944 }
1945
1946 LDEBUGFS_SEQ_FOPS(ll_rw_extents_stats);
1947
1948 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1949                        struct ll_file_data *file, loff_t pos,
1950                        size_t count, int rw)
1951 {
1952         int i, cur = -1;
1953         struct ll_rw_process_info *process;
1954         struct ll_rw_process_info *offset;
1955         int *off_count = &sbi->ll_rw_offset_entry_count;
1956         int *process_count = &sbi->ll_offset_process_count;
1957         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1958
1959         if(!sbi->ll_rw_stats_on)
1960                 return;
1961         process = sbi->ll_rw_process_info;
1962         offset = sbi->ll_rw_offset_info;
1963
1964         spin_lock(&sbi->ll_pp_extent_lock);
1965         /* Extent statistics */
1966         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1967                 if(io_extents->pp_extents[i].pid == pid) {
1968                         cur = i;
1969                         break;
1970                 }
1971         }
1972
1973         if (cur == -1) {
1974                 /* new process */
1975                 sbi->ll_extent_process_count =
1976                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1977                 cur = sbi->ll_extent_process_count;
1978                 io_extents->pp_extents[cur].pid = pid;
1979                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1980                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1981         }
1982
1983         for (i = 0; (count >= 1 << (LL_HIST_START + i)) &&
1984              (i < (LL_HIST_MAX - 1)); i++);
1985         if (rw == 0) {
1986                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1987                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1988         } else {
1989                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1990                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1991         }
1992         spin_unlock(&sbi->ll_pp_extent_lock);
1993
1994         spin_lock(&sbi->ll_process_lock);
1995         /* Offset statistics */
1996         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1997                 if (process[i].rw_pid == pid) {
1998                         if (process[i].rw_last_file != file) {
1999                                 process[i].rw_range_start = pos;
2000                                 process[i].rw_last_file_pos = pos + count;
2001                                 process[i].rw_smallest_extent = count;
2002                                 process[i].rw_largest_extent = count;
2003                                 process[i].rw_offset = 0;
2004                                 process[i].rw_last_file = file;
2005                                 spin_unlock(&sbi->ll_process_lock);
2006                                 return;
2007                         }
2008                         if (process[i].rw_last_file_pos != pos) {
2009                                 *off_count =
2010                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
2011                                 offset[*off_count].rw_op = process[i].rw_op;
2012                                 offset[*off_count].rw_pid = pid;
2013                                 offset[*off_count].rw_range_start =
2014                                         process[i].rw_range_start;
2015                                 offset[*off_count].rw_range_end =
2016                                         process[i].rw_last_file_pos;
2017                                 offset[*off_count].rw_smallest_extent =
2018                                         process[i].rw_smallest_extent;
2019                                 offset[*off_count].rw_largest_extent =
2020                                         process[i].rw_largest_extent;
2021                                 offset[*off_count].rw_offset =
2022                                         process[i].rw_offset;
2023                                 process[i].rw_op = rw;
2024                                 process[i].rw_range_start = pos;
2025                                 process[i].rw_smallest_extent = count;
2026                                 process[i].rw_largest_extent = count;
2027                                 process[i].rw_offset = pos -
2028                                         process[i].rw_last_file_pos;
2029                         }
2030                         if(process[i].rw_smallest_extent > count)
2031                                 process[i].rw_smallest_extent = count;
2032                         if(process[i].rw_largest_extent < count)
2033                                 process[i].rw_largest_extent = count;
2034                         process[i].rw_last_file_pos = pos + count;
2035                         spin_unlock(&sbi->ll_process_lock);
2036                         return;
2037                 }
2038         }
2039         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
2040         process[*process_count].rw_pid = pid;
2041         process[*process_count].rw_op = rw;
2042         process[*process_count].rw_range_start = pos;
2043         process[*process_count].rw_last_file_pos = pos + count;
2044         process[*process_count].rw_smallest_extent = count;
2045         process[*process_count].rw_largest_extent = count;
2046         process[*process_count].rw_offset = 0;
2047         process[*process_count].rw_last_file = file;
2048         spin_unlock(&sbi->ll_process_lock);
2049 }
2050
2051 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
2052 {
2053         struct timespec64 now;
2054         struct ll_sb_info *sbi = seq->private;
2055         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
2056         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
2057         int i;
2058
2059         ktime_get_real_ts64(&now);
2060
2061         if (!sbi->ll_rw_stats_on) {
2062                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
2063                 return 0;
2064         }
2065         spin_lock(&sbi->ll_process_lock);
2066
2067         seq_printf(seq, "snapshot_time:         %llu.%09lu (secs.nsecs)\n",
2068                    (s64)now.tv_sec, now.tv_nsec);
2069         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
2070                    "R/W", "PID", "RANGE START", "RANGE END",
2071                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
2072
2073         /* We stored the discontiguous offsets here; print them first */
2074         for (i = 0; i < LL_OFFSET_HIST_MAX; i++) {
2075                 if (offset[i].rw_pid != 0)
2076                         seq_printf(seq,
2077                                   "%3c %10d %14llu %14llu %17lu %17lu %14lld\n",
2078                                    offset[i].rw_op == READ ? 'R' : 'W',
2079                                    offset[i].rw_pid,
2080                                    offset[i].rw_range_start,
2081                                    offset[i].rw_range_end,
2082                                    (unsigned long)offset[i].rw_smallest_extent,
2083                                    (unsigned long)offset[i].rw_largest_extent,
2084                                    offset[i].rw_offset);
2085         }
2086
2087         /* Then print the current offsets for each process */
2088         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
2089                 if (process[i].rw_pid != 0)
2090                         seq_printf(seq,
2091                                   "%3c %10d %14llu %14llu %17lu %17lu %14lld\n",
2092                                    process[i].rw_op == READ ? 'R' : 'W',
2093                                    process[i].rw_pid,
2094                                    process[i].rw_range_start,
2095                                    process[i].rw_last_file_pos,
2096                                    (unsigned long)process[i].rw_smallest_extent,
2097                                    (unsigned long)process[i].rw_largest_extent,
2098                                    process[i].rw_offset);
2099         }
2100         spin_unlock(&sbi->ll_process_lock);
2101
2102         return 0;
2103 }
2104
2105 static ssize_t ll_rw_offset_stats_seq_write(struct file *file,
2106                                             const char __user *buf,
2107                                             size_t len, loff_t *off)
2108 {
2109         struct seq_file *seq = file->private_data;
2110         struct ll_sb_info *sbi = seq->private;
2111         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
2112         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
2113         __s64 value;
2114
2115         if (len == 0)
2116                 return -EINVAL;
2117
2118         value = ll_stats_pid_write(buf, len);
2119
2120         if (value == 0)
2121                 sbi->ll_rw_stats_on = 0;
2122         else
2123                 sbi->ll_rw_stats_on = 1;
2124
2125         spin_lock(&sbi->ll_process_lock);
2126         sbi->ll_offset_process_count = 0;
2127         sbi->ll_rw_offset_entry_count = 0;
2128         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
2129                LL_PROCESS_HIST_MAX);
2130         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
2131                LL_OFFSET_HIST_MAX);
2132         spin_unlock(&sbi->ll_process_lock);
2133
2134         return len;
2135 }
2136
2137 LDEBUGFS_SEQ_FOPS(ll_rw_offset_stats);