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LU-12631 llite: report latency for filesystem ops
[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 #ifdef HAVE_UIDGID_HEADER
37 # include <linux/uidgid.h>
38 #endif
39 #include <uapi/linux/lustre/lustre_param.h>
40 #include <lprocfs_status.h>
41 #include <obd_support.h>
42
43 #include "llite_internal.h"
44 #include "vvp_internal.h"
45
46 static struct kobject *llite_kobj;
47 static struct dentry *llite_root;
48
49 static void llite_kobj_release(struct kobject *kobj)
50 {
51         if (!IS_ERR_OR_NULL(llite_root)) {
52                 debugfs_remove(llite_root);
53                 llite_root = NULL;
54         }
55
56         kfree(kobj);
57 }
58
59 static struct kobj_type llite_kobj_ktype = {
60         .release        = llite_kobj_release,
61         .sysfs_ops      = &lustre_sysfs_ops,
62 };
63
64 int llite_tunables_register(void)
65 {
66         int rc;
67
68         llite_kobj = kzalloc(sizeof(*llite_kobj), GFP_KERNEL);
69         if (!llite_kobj)
70                 return -ENOMEM;
71
72         llite_kobj->kset = lustre_kset;
73         rc = kobject_init_and_add(llite_kobj, &llite_kobj_ktype,
74                                   &lustre_kset->kobj, "%s", "llite");
75         if (rc)
76                 goto free_kobj;
77
78         llite_root = debugfs_create_dir("llite", debugfs_lustre_root);
79         if (IS_ERR_OR_NULL(llite_root)) {
80                 rc = llite_root ? PTR_ERR(llite_root) : -ENOMEM;
81                 llite_root = NULL;
82 free_kobj:
83                 kobject_put(llite_kobj);
84                 llite_kobj = NULL;
85         }
86
87         return rc;
88 }
89
90 void llite_tunables_unregister(void)
91 {
92         kobject_put(llite_kobj);
93         llite_kobj = NULL;
94 }
95
96 /* <debugfs>/lustre/llite mount point registration */
97 static const struct file_operations ll_rw_extents_stats_fops;
98 static const struct file_operations ll_rw_extents_stats_pp_fops;
99 static const struct file_operations ll_rw_offset_stats_fops;
100
101 /**
102  * ll_stats_pid_write() - Determine if stats collection should be enabled
103  * @buf: Buffer containing the data written
104  * @len: Number of bytes in the buffer
105  *
106  * Several proc files begin collecting stats when a value is written, and stop
107  * collecting when either '0' or 'disable' is written. This function checks the
108  * written value to see if collection should be enabled or disabled.
109  *
110  * Return: If '0' or 'disable' is provided, 0 is returned. If the text
111  * equivalent of a number is written, that number is returned. Otherwise,
112  * 1 is returned. Non-zero return values indicate collection should be enabled.
113  */
114 static s64 ll_stats_pid_write(const char __user *buf, size_t len)
115 {
116         unsigned long long value = 1;
117         char kernbuf[16];
118         int rc;
119
120         rc = kstrtoull_from_user(buf, len, 0, &value);
121         if (rc < 0 && len < sizeof(kernbuf)) {
122                 if (copy_from_user(kernbuf, buf, len))
123                         return -EFAULT;
124                 kernbuf[len] = 0;
125
126                 if (kernbuf[len - 1] == '\n')
127                         kernbuf[len - 1] = 0;
128
129                 if (strncasecmp(kernbuf, "disable", 7) == 0)
130                         value = 0;
131         }
132
133         return value;
134 }
135
136 static ssize_t blocksize_show(struct kobject *kobj, struct attribute *attr,
137                               char *buf)
138 {
139         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
140                                               ll_kset.kobj);
141         struct obd_statfs osfs;
142         int rc;
143
144         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
145         if (rc)
146                 return rc;
147
148         return sprintf(buf, "%u\n", osfs.os_bsize);
149 }
150 LUSTRE_RO_ATTR(blocksize);
151
152 static ssize_t stat_blocksize_show(struct kobject *kobj, struct attribute *attr,
153                                    char *buf)
154 {
155         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
156                                               ll_kset.kobj);
157
158         return sprintf(buf, "%u\n", sbi->ll_stat_blksize);
159 }
160
161 static ssize_t stat_blocksize_store(struct kobject *kobj,
162                                     struct attribute *attr,
163                                     const char *buffer,
164                                     size_t count)
165 {
166         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
167                                               ll_kset.kobj);
168         unsigned int val;
169         int rc;
170
171         rc = kstrtouint(buffer, 10, &val);
172         if (rc)
173                 return rc;
174
175         if (val != 0 && (val < PAGE_SIZE || (val & (val - 1))) != 0)
176                 return -ERANGE;
177
178         sbi->ll_stat_blksize = val;
179
180         return count;
181 }
182 LUSTRE_RW_ATTR(stat_blocksize);
183
184 static ssize_t kbytestotal_show(struct kobject *kobj, struct attribute *attr,
185                                 char *buf)
186 {
187         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
188                                               ll_kset.kobj);
189         struct obd_statfs osfs;
190         u32 blk_size;
191         u64 result;
192         int rc;
193
194         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
195         if (rc)
196                 return rc;
197
198         blk_size = osfs.os_bsize >> 10;
199         result = osfs.os_blocks;
200
201         while (blk_size >>= 1)
202                 result <<= 1;
203
204         return sprintf(buf, "%llu\n", result);
205 }
206 LUSTRE_RO_ATTR(kbytestotal);
207
208 static ssize_t kbytesfree_show(struct kobject *kobj, struct attribute *attr,
209                                char *buf)
210 {
211         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
212                                               ll_kset.kobj);
213         struct obd_statfs osfs;
214         u32 blk_size;
215         u64 result;
216         int rc;
217
218         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
219         if (rc)
220                 return rc;
221
222         blk_size = osfs.os_bsize >> 10;
223         result = osfs.os_bfree;
224
225         while (blk_size >>= 1)
226                 result <<= 1;
227
228         return sprintf(buf, "%llu\n", result);
229 }
230 LUSTRE_RO_ATTR(kbytesfree);
231
232 static ssize_t kbytesavail_show(struct kobject *kobj, struct attribute *attr,
233                                 char *buf)
234 {
235         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
236                                               ll_kset.kobj);
237         struct obd_statfs osfs;
238         u32 blk_size;
239         u64 result;
240         int rc;
241
242         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
243         if (rc)
244                 return rc;
245
246         blk_size = osfs.os_bsize >> 10;
247         result = osfs.os_bavail;
248
249         while (blk_size >>= 1)
250                 result <<= 1;
251
252         return sprintf(buf, "%llu\n", result);
253 }
254 LUSTRE_RO_ATTR(kbytesavail);
255
256 static ssize_t filestotal_show(struct kobject *kobj, struct attribute *attr,
257                                char *buf)
258 {
259         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
260                                               ll_kset.kobj);
261         struct obd_statfs osfs;
262         int rc;
263
264         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
265         if (rc)
266                 return rc;
267
268         return sprintf(buf, "%llu\n", osfs.os_files);
269 }
270 LUSTRE_RO_ATTR(filestotal);
271
272 static ssize_t filesfree_show(struct kobject *kobj, struct attribute *attr,
273                               char *buf)
274 {
275         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
276                                               ll_kset.kobj);
277         struct obd_statfs osfs;
278         int rc;
279
280         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
281         if (rc)
282                 return rc;
283
284         return sprintf(buf, "%llu\n", osfs.os_ffree);
285 }
286 LUSTRE_RO_ATTR(filesfree);
287
288 static ssize_t client_type_show(struct kobject *kobj, struct attribute *attr,
289                                 char *buf)
290 {
291         return sprintf(buf, "local client\n");
292 }
293 LUSTRE_RO_ATTR(client_type);
294
295 static ssize_t fstype_show(struct kobject *kobj, struct attribute *attr,
296                            char *buf)
297 {
298         return sprintf(buf, "lustre\n");
299 }
300 LUSTRE_RO_ATTR(fstype);
301
302 static ssize_t uuid_show(struct kobject *kobj, struct attribute *attr,
303                          char *buf)
304 {
305         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
306                                               ll_kset.kobj);
307
308         return sprintf(buf, "%s\n", sbi->ll_sb_uuid.uuid);
309 }
310 LUSTRE_RO_ATTR(uuid);
311
312 static int ll_site_stats_seq_show(struct seq_file *m, void *v)
313 {
314         struct super_block *sb = m->private;
315
316         /*
317          * See description of statistical counters in struct cl_site, and
318          * struct lu_site.
319          */
320         return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site), m);
321 }
322
323 LDEBUGFS_SEQ_FOPS_RO(ll_site_stats);
324
325 static int ll_max_readahead_mb_seq_show(struct seq_file *m, void *v)
326 {
327         struct super_block *sb = m->private;
328         struct ll_sb_info *sbi = ll_s2sbi(sb);
329         unsigned long ra_max_mb;
330
331         spin_lock(&sbi->ll_lock);
332         ra_max_mb = PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages);
333         spin_unlock(&sbi->ll_lock);
334
335         seq_printf(m, "%lu\n", ra_max_mb);
336         return 0;
337 }
338
339 static ssize_t
340 ll_max_readahead_mb_seq_write(struct file *file, const char __user *buffer,
341                               size_t count, loff_t *off)
342 {
343         struct seq_file *m = file->private_data;
344         struct super_block *sb = m->private;
345         struct ll_sb_info *sbi = ll_s2sbi(sb);
346         s64 ra_max_mb, pages_number;
347         int rc;
348
349         rc = lprocfs_str_with_units_to_s64(buffer, count, &ra_max_mb, 'M');
350         if (rc)
351                 return rc;
352
353         pages_number = round_up(ra_max_mb, 1024 * 1024) >> PAGE_SHIFT;
354         if (pages_number < 0 || pages_number > cfs_totalram_pages() / 2) {
355                 /* 1/2 of RAM */
356                 CERROR("%s: can't set max_readahead_mb=%llu > %luMB\n",
357                        sbi->ll_fsname, PAGES_TO_MiB(pages_number),
358                        PAGES_TO_MiB(cfs_totalram_pages()));
359                 return -ERANGE;
360         }
361
362         spin_lock(&sbi->ll_lock);
363         sbi->ll_ra_info.ra_max_pages = pages_number;
364         spin_unlock(&sbi->ll_lock);
365
366         return count;
367 }
368
369 LDEBUGFS_SEQ_FOPS(ll_max_readahead_mb);
370
371 static int ll_max_readahead_per_file_mb_seq_show(struct seq_file *m, void *v)
372 {
373         struct super_block *sb = m->private;
374         struct ll_sb_info *sbi = ll_s2sbi(sb);
375         unsigned long ra_max_file_mb;
376
377         spin_lock(&sbi->ll_lock);
378         ra_max_file_mb = PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages_per_file);
379         spin_unlock(&sbi->ll_lock);
380
381         seq_printf(m, "%lu\n", ra_max_file_mb);
382         return 0;
383 }
384
385 static ssize_t
386 ll_max_readahead_per_file_mb_seq_write(struct file *file,
387                                        const char __user *buffer,
388                                        size_t count, loff_t *off)
389 {
390         struct seq_file *m = file->private_data;
391         struct super_block *sb = m->private;
392         struct ll_sb_info *sbi = ll_s2sbi(sb);
393         s64 ra_max_file_mb, pages_number;
394         int rc;
395
396         rc = lprocfs_str_with_units_to_s64(buffer, count, &ra_max_file_mb,
397                                            'M');
398         if (rc)
399                 return rc;
400
401         pages_number = round_up(ra_max_file_mb, 1024 * 1024) >> PAGE_SHIFT;
402         if (pages_number < 0 || pages_number > sbi->ll_ra_info.ra_max_pages) {
403                 CERROR("%s: can't set max_readahead_per_file_mb=%llu > max_read_ahead_mb=%lu\n",
404                        sbi->ll_fsname, PAGES_TO_MiB(pages_number),
405                        PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages));
406                 return -ERANGE;
407         }
408
409         spin_lock(&sbi->ll_lock);
410         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
411         spin_unlock(&sbi->ll_lock);
412
413         return count;
414 }
415
416 LDEBUGFS_SEQ_FOPS(ll_max_readahead_per_file_mb);
417
418 static int ll_max_read_ahead_whole_mb_seq_show(struct seq_file *m, void *v)
419 {
420         struct super_block *sb = m->private;
421         struct ll_sb_info *sbi = ll_s2sbi(sb);
422         unsigned long ra_max_whole_mb;
423
424         spin_lock(&sbi->ll_lock);
425         ra_max_whole_mb = PAGES_TO_MiB(sbi->ll_ra_info.ra_max_read_ahead_whole_pages);
426         spin_unlock(&sbi->ll_lock);
427
428         seq_printf(m, "%lu\n", ra_max_whole_mb);
429         return 0;
430 }
431
432 static ssize_t
433 ll_max_read_ahead_whole_mb_seq_write(struct file *file,
434                                      const char __user *buffer,
435                                      size_t count, loff_t *off)
436 {
437         struct seq_file *m = file->private_data;
438         struct super_block *sb = m->private;
439         struct ll_sb_info *sbi = ll_s2sbi(sb);
440         s64 ra_max_whole_mb, pages_number;
441         int rc;
442
443         rc = lprocfs_str_with_units_to_s64(buffer, count, &ra_max_whole_mb,
444                                            'M');
445         if (rc)
446                 return rc;
447
448         pages_number = round_up(ra_max_whole_mb, 1024 * 1024) >> PAGE_SHIFT;
449         /* Cap this at the current max readahead window size, the readahead
450          * algorithm does this anyway so it's pointless to set it larger.
451          */
452         if (pages_number < 0 ||
453             pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
454                 CERROR("%s: can't set max_read_ahead_whole_mb=%llu > max_read_ahead_per_file_mb=%lu\n",
455                        sbi->ll_fsname, PAGES_TO_MiB(pages_number),
456                        PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages_per_file));
457                 return -ERANGE;
458         }
459
460         spin_lock(&sbi->ll_lock);
461         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
462         spin_unlock(&sbi->ll_lock);
463
464         return count;
465 }
466
467 LDEBUGFS_SEQ_FOPS(ll_max_read_ahead_whole_mb);
468
469 static int ll_max_cached_mb_seq_show(struct seq_file *m, void *v)
470 {
471         struct super_block     *sb    = m->private;
472         struct ll_sb_info      *sbi   = ll_s2sbi(sb);
473         struct cl_client_cache *cache = sbi->ll_cache;
474         long max_cached_mb;
475         long unused_mb;
476
477         max_cached_mb = PAGES_TO_MiB(cache->ccc_lru_max);
478         unused_mb = PAGES_TO_MiB(atomic_long_read(&cache->ccc_lru_left));
479         seq_printf(m, "users: %d\n"
480                       "max_cached_mb: %ld\n"
481                       "used_mb: %ld\n"
482                       "unused_mb: %ld\n"
483                       "reclaim_count: %u\n",
484                    atomic_read(&cache->ccc_users),
485                    max_cached_mb,
486                    max_cached_mb - unused_mb,
487                    unused_mb,
488                    cache->ccc_lru_shrinkers);
489         return 0;
490 }
491
492 static ssize_t ll_max_cached_mb_seq_write(struct file *file,
493                                           const char __user *buffer,
494                                           size_t count, loff_t *off)
495 {
496         struct seq_file *m = file->private_data;
497         struct super_block *sb = m->private;
498         struct ll_sb_info *sbi = ll_s2sbi(sb);
499         struct cl_client_cache *cache = sbi->ll_cache;
500         struct lu_env *env;
501         long diff = 0;
502         long nrpages = 0;
503         __u16 refcheck;
504         __s64 pages_number;
505         int rc;
506         char kernbuf[128];
507
508         ENTRY;
509         if (count >= sizeof(kernbuf))
510                 RETURN(-EINVAL);
511
512         if (copy_from_user(kernbuf, buffer, count))
513                 RETURN(-EFAULT);
514         kernbuf[count] = 0;
515
516         buffer += lprocfs_find_named_value(kernbuf, "max_cached_mb:", &count) -
517                   kernbuf;
518         rc = lprocfs_str_with_units_to_s64(buffer, count, &pages_number, 'M');
519         if (rc)
520                 RETURN(rc);
521
522         pages_number >>= PAGE_SHIFT;
523
524         if (pages_number < 0 || pages_number > cfs_totalram_pages()) {
525                 CERROR("%s: can't set max cache more than %lu MB\n",
526                        sbi->ll_fsname,
527                        PAGES_TO_MiB(cfs_totalram_pages()));
528                 RETURN(-ERANGE);
529         }
530         /* Allow enough cache so clients can make well-formed RPCs */
531         pages_number = max_t(long, pages_number, PTLRPC_MAX_BRW_PAGES);
532
533         spin_lock(&sbi->ll_lock);
534         diff = pages_number - cache->ccc_lru_max;
535         spin_unlock(&sbi->ll_lock);
536
537         /* easy - add more LRU slots. */
538         if (diff >= 0) {
539                 atomic_long_add(diff, &cache->ccc_lru_left);
540                 GOTO(out, rc = 0);
541         }
542
543         env = cl_env_get(&refcheck);
544         if (IS_ERR(env))
545                 RETURN(PTR_ERR(env));
546
547         diff = -diff;
548         while (diff > 0) {
549                 long tmp;
550
551                 /* reduce LRU budget from free slots. */
552                 do {
553                         long ov, nv;
554
555                         ov = atomic_long_read(&cache->ccc_lru_left);
556                         if (ov == 0)
557                                 break;
558
559                         nv = ov > diff ? ov - diff : 0;
560                         rc = atomic_long_cmpxchg(&cache->ccc_lru_left, ov, nv);
561                         if (likely(ov == rc)) {
562                                 diff -= ov - nv;
563                                 nrpages += ov - nv;
564                                 break;
565                         }
566                 } while (1);
567
568                 if (diff <= 0)
569                         break;
570
571                 if (sbi->ll_dt_exp == NULL) { /* being initialized */
572                         rc = -ENODEV;
573                         break;
574                 }
575
576                 /* difficult - have to ask OSCs to drop LRU slots. */
577                 tmp = diff << 1;
578                 rc = obd_set_info_async(env, sbi->ll_dt_exp,
579                                 sizeof(KEY_CACHE_LRU_SHRINK),
580                                 KEY_CACHE_LRU_SHRINK,
581                                 sizeof(tmp), &tmp, NULL);
582                 if (rc < 0)
583                         break;
584         }
585         cl_env_put(env, &refcheck);
586
587 out:
588         if (rc >= 0) {
589                 spin_lock(&sbi->ll_lock);
590                 cache->ccc_lru_max = pages_number;
591                 spin_unlock(&sbi->ll_lock);
592                 rc = count;
593         } else {
594                 atomic_long_add(nrpages, &cache->ccc_lru_left);
595         }
596         return rc;
597 }
598
599 LDEBUGFS_SEQ_FOPS(ll_max_cached_mb);
600
601 static ssize_t checksums_show(struct kobject *kobj, struct attribute *attr,
602                               char *buf)
603 {
604         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
605                                               ll_kset.kobj);
606
607         return sprintf(buf, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
608 }
609
610 static ssize_t checksums_store(struct kobject *kobj, struct attribute *attr,
611                                const char *buffer, size_t count)
612 {
613         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
614                                               ll_kset.kobj);
615         bool val;
616         int tmp;
617         int rc;
618
619         if (!sbi->ll_dt_exp)
620                 /* Not set up yet */
621                 return -EAGAIN;
622
623         rc = kstrtobool(buffer, &val);
624         if (rc)
625                 return rc;
626         if (val)
627                 sbi->ll_flags |= LL_SBI_CHECKSUM;
628         else
629                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
630         tmp = val;
631
632         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
633                                 KEY_CHECKSUM, sizeof(tmp), &tmp, NULL);
634         if (rc)
635                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
636
637         return count;
638 }
639 LUSTRE_RW_ATTR(checksums);
640
641 LUSTRE_ATTR(checksum_pages, 0644, checksums_show, checksums_store);
642
643 static ssize_t ll_rd_track_id(struct kobject *kobj, char *buf,
644                               enum stats_track_type type)
645 {
646         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
647                                               ll_kset.kobj);
648
649         if (sbi->ll_stats_track_type == type)
650                 return sprintf(buf, "%d\n", sbi->ll_stats_track_id);
651         else if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
652                 return sprintf(buf, "0 (all)\n");
653
654         return sprintf(buf, "untracked\n");
655 }
656
657 static ssize_t ll_wr_track_id(struct kobject *kobj, const char *buffer,
658                               size_t count, enum stats_track_type type)
659 {
660         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
661                                               ll_kset.kobj);
662         unsigned long pid;
663         int rc;
664
665         rc = kstrtoul(buffer, 10, &pid);
666         if (rc)
667                 return rc;
668
669         sbi->ll_stats_track_id = pid;
670         if (pid == 0)
671                 sbi->ll_stats_track_type = STATS_TRACK_ALL;
672         else
673                 sbi->ll_stats_track_type = type;
674         lprocfs_clear_stats(sbi->ll_stats);
675         return count;
676 }
677
678 static ssize_t stats_track_pid_show(struct kobject *kobj,
679                                     struct attribute *attr,
680                                     char *buf)
681 {
682         return ll_rd_track_id(kobj, buf, STATS_TRACK_PID);
683 }
684
685 static ssize_t stats_track_pid_store(struct kobject *kobj,
686                                      struct attribute *attr,
687                                      const char *buffer,
688                                      size_t count)
689 {
690         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_PID);
691 }
692 LUSTRE_RW_ATTR(stats_track_pid);
693
694 static ssize_t stats_track_ppid_show(struct kobject *kobj,
695                                      struct attribute *attr,
696                                      char *buf)
697 {
698         return ll_rd_track_id(kobj, buf, STATS_TRACK_PPID);
699 }
700
701 static ssize_t stats_track_ppid_store(struct kobject *kobj,
702                                       struct attribute *attr,
703                                       const char *buffer,
704                                       size_t count)
705 {
706         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_PPID);
707 }
708 LUSTRE_RW_ATTR(stats_track_ppid);
709
710 static ssize_t stats_track_gid_show(struct kobject *kobj,
711                                     struct attribute *attr,
712                                     char *buf)
713 {
714         return ll_rd_track_id(kobj, buf, STATS_TRACK_GID);
715 }
716
717 static ssize_t stats_track_gid_store(struct kobject *kobj,
718                                      struct attribute *attr,
719                                      const char *buffer,
720                                      size_t count)
721 {
722         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_GID);
723 }
724 LUSTRE_RW_ATTR(stats_track_gid);
725
726 static ssize_t statahead_running_max_show(struct kobject *kobj,
727                                           struct attribute *attr,
728                                           char *buf)
729 {
730         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
731                                               ll_kset.kobj);
732
733         return snprintf(buf, 16, "%u\n", sbi->ll_sa_running_max);
734 }
735
736 static ssize_t statahead_running_max_store(struct kobject *kobj,
737                                            struct attribute *attr,
738                                            const char *buffer,
739                                            size_t count)
740 {
741         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
742                                               ll_kset.kobj);
743         unsigned long val;
744         int rc;
745
746         rc = kstrtoul(buffer, 0, &val);
747         if (rc)
748                 return rc;
749
750         if (val <= LL_SA_RUNNING_MAX) {
751                 sbi->ll_sa_running_max = val;
752                 return count;
753         }
754
755         CERROR("Bad statahead_running_max value %lu. Valid values "
756                "are in the range [0, %d]\n", val, LL_SA_RUNNING_MAX);
757
758         return -ERANGE;
759 }
760 LUSTRE_RW_ATTR(statahead_running_max);
761
762 static ssize_t statahead_max_show(struct kobject *kobj,
763                                   struct attribute *attr,
764                                   char *buf)
765 {
766         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
767                                               ll_kset.kobj);
768
769         return sprintf(buf, "%u\n", sbi->ll_sa_max);
770 }
771
772 static ssize_t statahead_max_store(struct kobject *kobj,
773                                    struct attribute *attr,
774                                    const char *buffer,
775                                    size_t count)
776 {
777         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
778                                               ll_kset.kobj);
779         unsigned long val;
780         int rc;
781
782         rc = kstrtoul(buffer, 0, &val);
783         if (rc)
784                 return rc;
785
786         if (val <= LL_SA_RPC_MAX)
787                 sbi->ll_sa_max = val;
788         else
789                 CERROR("Bad statahead_max value %lu. Valid values are in the range [0, %d]\n",
790                        val, LL_SA_RPC_MAX);
791
792         return count;
793 }
794 LUSTRE_RW_ATTR(statahead_max);
795
796 static ssize_t statahead_agl_show(struct kobject *kobj,
797                                   struct attribute *attr,
798                                   char *buf)
799 {
800         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
801                                               ll_kset.kobj);
802
803         return sprintf(buf, "%u\n", sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
804 }
805
806 static ssize_t statahead_agl_store(struct kobject *kobj,
807                                    struct attribute *attr,
808                                    const char *buffer,
809                                    size_t count)
810 {
811         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
812                                               ll_kset.kobj);
813         bool val;
814         int rc;
815
816         rc = kstrtobool(buffer, &val);
817         if (rc)
818                 return rc;
819
820         if (val)
821                 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
822         else
823                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
824
825         return count;
826 }
827 LUSTRE_RW_ATTR(statahead_agl);
828
829 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
830 {
831         struct super_block *sb = m->private;
832         struct ll_sb_info *sbi = ll_s2sbi(sb);
833
834         seq_printf(m, "statahead total: %u\n"
835                       "statahead wrong: %u\n"
836                       "agl total: %u\n",
837                    atomic_read(&sbi->ll_sa_total),
838                    atomic_read(&sbi->ll_sa_wrong),
839                    atomic_read(&sbi->ll_agl_total));
840         return 0;
841 }
842
843 LDEBUGFS_SEQ_FOPS_RO(ll_statahead_stats);
844
845 static ssize_t lazystatfs_show(struct kobject *kobj,
846                                struct attribute *attr,
847                                char *buf)
848 {
849         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
850                                               ll_kset.kobj);
851
852         return sprintf(buf, "%u\n", (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
853 }
854
855 static ssize_t lazystatfs_store(struct kobject *kobj,
856                                 struct attribute *attr,
857                                 const char *buffer,
858                                 size_t count)
859 {
860         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
861                                               ll_kset.kobj);
862         bool val;
863         int rc;
864
865         rc = kstrtobool(buffer, &val);
866         if (rc)
867                 return rc;
868
869         if (val)
870                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
871         else
872                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
873
874         return count;
875 }
876 LUSTRE_RW_ATTR(lazystatfs);
877
878 static ssize_t statfs_max_age_show(struct kobject *kobj, struct attribute *attr,
879                                    char *buf)
880 {
881         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
882                                               ll_kset.kobj);
883
884         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_statfs_max_age);
885 }
886
887 static ssize_t statfs_max_age_store(struct kobject *kobj,
888                                     struct attribute *attr, const char *buffer,
889                                     size_t count)
890 {
891         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
892                                               ll_kset.kobj);
893         unsigned int val;
894         int rc;
895
896         rc = kstrtouint(buffer, 10, &val);
897         if (rc)
898                 return rc;
899         if (val > OBD_STATFS_CACHE_MAX_AGE)
900                 return -EINVAL;
901
902         sbi->ll_statfs_max_age = val;
903
904         return count;
905 }
906 LUSTRE_RW_ATTR(statfs_max_age);
907
908 static ssize_t max_easize_show(struct kobject *kobj,
909                                struct attribute *attr,
910                                char *buf)
911 {
912         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
913                                               ll_kset.kobj);
914         unsigned int ealen;
915         int rc;
916
917         rc = ll_get_max_mdsize(sbi, &ealen);
918         if (rc)
919                 return rc;
920
921         /* Limit xattr size returned to userspace based on kernel maximum */
922         return snprintf(buf, PAGE_SIZE, "%u\n",
923                         ealen > XATTR_SIZE_MAX ? XATTR_SIZE_MAX : ealen);
924 }
925 LUSTRE_RO_ATTR(max_easize);
926
927 /**
928  * Get default_easize.
929  *
930  * \see client_obd::cl_default_mds_easize
931  *
932  * \param[in] m         seq_file handle
933  * \param[in] v         unused for single entry
934  *
935  * \retval 0            on success
936  * \retval negative     negated errno on failure
937  */
938 static ssize_t default_easize_show(struct kobject *kobj,
939                                    struct attribute *attr,
940                                    char *buf)
941 {
942         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
943                                               ll_kset.kobj);
944         unsigned int ealen;
945         int rc;
946
947         rc = ll_get_default_mdsize(sbi, &ealen);
948         if (rc)
949                 return rc;
950
951         /* Limit xattr size returned to userspace based on kernel maximum */
952         return snprintf(buf, PAGE_SIZE, "%u\n",
953                         ealen > XATTR_SIZE_MAX ? XATTR_SIZE_MAX : ealen);
954 }
955
956 /**
957  * Set default_easize.
958  *
959  * Range checking on the passed value is handled by
960  * ll_set_default_mdsize().
961  *
962  * \see client_obd::cl_default_mds_easize
963  *
964  * \param[in] file      proc file
965  * \param[in] buffer    string passed from user space
966  * \param[in] count     \a buffer length
967  * \param[in] off       unused for single entry
968  *
969  * \retval positive     \a count on success
970  * \retval negative     negated errno on failure
971  */
972 static ssize_t default_easize_store(struct kobject *kobj,
973                                     struct attribute *attr,
974                                     const char *buffer,
975                                     size_t count)
976 {
977         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
978                                               ll_kset.kobj);
979         unsigned int val;
980         int rc;
981
982         if (count == 0)
983                 return 0;
984
985         rc = kstrtouint(buffer, 10, &val);
986         if (rc)
987                 return rc;
988
989         rc = ll_set_default_mdsize(sbi, val);
990         if (rc)
991                 return rc;
992
993         return count;
994 }
995 LUSTRE_RW_ATTR(default_easize);
996
997 static int ll_sbi_flags_seq_show(struct seq_file *m, void *v)
998 {
999         const char *str[] = LL_SBI_FLAGS;
1000         struct super_block *sb = m->private;
1001         int flags = ll_s2sbi(sb)->ll_flags;
1002         int i = 0;
1003
1004         while (flags != 0) {
1005                 if (ARRAY_SIZE(str) <= i) {
1006                         CERROR("%s: Revise array LL_SBI_FLAGS to match sbi "
1007                                 "flags please.\n", ll_s2sbi(sb)->ll_fsname);
1008                         return -EINVAL;
1009                 }
1010
1011                 if (flags & 0x1)
1012                         seq_printf(m, "%s ", str[i]);
1013                 flags >>= 1;
1014                 ++i;
1015         }
1016         seq_printf(m, "\b\n");
1017         return 0;
1018 }
1019
1020 LDEBUGFS_SEQ_FOPS_RO(ll_sbi_flags);
1021
1022 static ssize_t xattr_cache_show(struct kobject *kobj,
1023                                 struct attribute *attr,
1024                                 char *buf)
1025 {
1026         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1027                                               ll_kset.kobj);
1028
1029         return sprintf(buf, "%u\n", sbi->ll_xattr_cache_enabled);
1030 }
1031
1032 static ssize_t xattr_cache_store(struct kobject *kobj,
1033                                  struct attribute *attr,
1034                                  const char *buffer,
1035                                  size_t count)
1036 {
1037         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1038                                               ll_kset.kobj);
1039         bool val;
1040         int rc;
1041
1042         rc = kstrtobool(buffer, &val);
1043         if (rc)
1044                 return rc;
1045
1046         if (val && !(sbi->ll_flags & LL_SBI_XATTR_CACHE))
1047                 return -ENOTSUPP;
1048
1049         sbi->ll_xattr_cache_enabled = val;
1050         sbi->ll_xattr_cache_set = 1;
1051
1052         return count;
1053 }
1054 LUSTRE_RW_ATTR(xattr_cache);
1055
1056 static ssize_t tiny_write_show(struct kobject *kobj,
1057                                struct attribute *attr,
1058                                char *buf)
1059 {
1060         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1061                                               ll_kset.kobj);
1062
1063         return sprintf(buf, "%u\n", !!(sbi->ll_flags & LL_SBI_TINY_WRITE));
1064 }
1065
1066 static ssize_t tiny_write_store(struct kobject *kobj,
1067                                 struct attribute *attr,
1068                                 const char *buffer,
1069                                 size_t count)
1070 {
1071         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1072                                               ll_kset.kobj);
1073         bool val;
1074         int rc;
1075
1076         rc = kstrtobool(buffer, &val);
1077         if (rc)
1078                 return rc;
1079
1080         spin_lock(&sbi->ll_lock);
1081         if (val)
1082                 sbi->ll_flags |= LL_SBI_TINY_WRITE;
1083         else
1084                 sbi->ll_flags &= ~LL_SBI_TINY_WRITE;
1085         spin_unlock(&sbi->ll_lock);
1086
1087         return count;
1088 }
1089 LUSTRE_RW_ATTR(tiny_write);
1090
1091 static ssize_t max_read_ahead_async_active_show(struct kobject *kobj,
1092                                                struct attribute *attr,
1093                                                char *buf)
1094 {
1095         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1096                                               ll_kset.kobj);
1097
1098         return snprintf(buf, PAGE_SIZE, "%u\n",
1099                         sbi->ll_ra_info.ra_async_max_active);
1100 }
1101
1102 static ssize_t max_read_ahead_async_active_store(struct kobject *kobj,
1103                                                 struct attribute *attr,
1104                                                 const char *buffer,
1105                                                 size_t count)
1106 {
1107         unsigned int val;
1108         int rc;
1109         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1110                                               ll_kset.kobj);
1111
1112         rc = kstrtouint(buffer, 10, &val);
1113         if (rc)
1114                 return rc;
1115
1116         if (val < 1 || val > WQ_UNBOUND_MAX_ACTIVE) {
1117                 CERROR("%s: cannot set max_read_ahead_async_active=%u %s than %u\n",
1118                        sbi->ll_fsname, val,
1119                        val < 1 ? "smaller" : "larger",
1120                        val < 1 ? 1 : WQ_UNBOUND_MAX_ACTIVE);
1121                 return -ERANGE;
1122         }
1123
1124         sbi->ll_ra_info.ra_async_max_active = val;
1125         workqueue_set_max_active(sbi->ll_ra_info.ll_readahead_wq, val);
1126
1127         return count;
1128 }
1129 LUSTRE_RW_ATTR(max_read_ahead_async_active);
1130
1131 static ssize_t read_ahead_async_file_threshold_mb_show(struct kobject *kobj,
1132                                                        struct attribute *attr,
1133                                                        char *buf)
1134 {
1135         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1136                                               ll_kset.kobj);
1137
1138         return snprintf(buf, PAGE_SIZE, "%lu\n",
1139              PAGES_TO_MiB(sbi->ll_ra_info.ra_async_pages_per_file_threshold));
1140 }
1141
1142 static ssize_t
1143 read_ahead_async_file_threshold_mb_store(struct kobject *kobj,
1144                                          struct attribute *attr,
1145                                          const char *buffer, size_t count)
1146 {
1147         unsigned long pages_number;
1148         unsigned long max_ra_per_file;
1149         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1150                                               ll_kset.kobj);
1151         int rc;
1152
1153         rc = kstrtoul(buffer, 10, &pages_number);
1154         if (rc)
1155                 return rc;
1156
1157         pages_number = MiB_TO_PAGES(pages_number);
1158         max_ra_per_file = sbi->ll_ra_info.ra_max_pages_per_file;
1159         if (pages_number < 0 || pages_number > max_ra_per_file) {
1160                 CERROR("%s: can't set read_ahead_async_file_threshold_mb=%lu > "
1161                        "max_read_readahead_per_file_mb=%lu\n", sbi->ll_fsname,
1162                        PAGES_TO_MiB(pages_number),
1163                        PAGES_TO_MiB(max_ra_per_file));
1164                 return -ERANGE;
1165         }
1166         sbi->ll_ra_info.ra_async_pages_per_file_threshold = pages_number;
1167
1168         return count;
1169 }
1170 LUSTRE_RW_ATTR(read_ahead_async_file_threshold_mb);
1171
1172 static ssize_t fast_read_show(struct kobject *kobj,
1173                               struct attribute *attr,
1174                               char *buf)
1175 {
1176         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1177                                               ll_kset.kobj);
1178
1179         return sprintf(buf, "%u\n", !!(sbi->ll_flags & LL_SBI_FAST_READ));
1180 }
1181
1182 static ssize_t fast_read_store(struct kobject *kobj,
1183                                struct attribute *attr,
1184                                const char *buffer,
1185                                size_t count)
1186 {
1187         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1188                                               ll_kset.kobj);
1189         bool val;
1190         int rc;
1191
1192         rc = kstrtobool(buffer, &val);
1193         if (rc)
1194                 return rc;
1195
1196         spin_lock(&sbi->ll_lock);
1197         if (val)
1198                 sbi->ll_flags |= LL_SBI_FAST_READ;
1199         else
1200                 sbi->ll_flags &= ~LL_SBI_FAST_READ;
1201         spin_unlock(&sbi->ll_lock);
1202
1203         return count;
1204 }
1205 LUSTRE_RW_ATTR(fast_read);
1206
1207 static ssize_t file_heat_show(struct kobject *kobj,
1208                               struct attribute *attr,
1209                               char *buf)
1210 {
1211         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1212                                               ll_kset.kobj);
1213
1214         return snprintf(buf, PAGE_SIZE, "%u\n",
1215                         !!(sbi->ll_flags & LL_SBI_FILE_HEAT));
1216 }
1217
1218 static ssize_t file_heat_store(struct kobject *kobj,
1219                                struct attribute *attr,
1220                                const char *buffer,
1221                                size_t count)
1222 {
1223         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1224                                               ll_kset.kobj);
1225         bool val;
1226         int rc;
1227
1228         rc = kstrtobool(buffer, &val);
1229         if (rc)
1230                 return rc;
1231
1232         spin_lock(&sbi->ll_lock);
1233         if (val)
1234                 sbi->ll_flags |= LL_SBI_FILE_HEAT;
1235         else
1236                 sbi->ll_flags &= ~LL_SBI_FILE_HEAT;
1237         spin_unlock(&sbi->ll_lock);
1238
1239         return count;
1240 }
1241 LUSTRE_RW_ATTR(file_heat);
1242
1243 static ssize_t heat_decay_percentage_show(struct kobject *kobj,
1244                                           struct attribute *attr,
1245                                           char *buf)
1246 {
1247         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1248                                               ll_kset.kobj);
1249
1250         return snprintf(buf, PAGE_SIZE, "%u\n",
1251                        (sbi->ll_heat_decay_weight * 100 + 128) / 256);
1252 }
1253
1254 static ssize_t heat_decay_percentage_store(struct kobject *kobj,
1255                                            struct attribute *attr,
1256                                            const char *buffer,
1257                                            size_t count)
1258 {
1259         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1260                                               ll_kset.kobj);
1261         unsigned long val;
1262         int rc;
1263
1264         rc = kstrtoul(buffer, 10, &val);
1265         if (rc)
1266                 return rc;
1267
1268         if (val < 0 || val > 100)
1269                 return -ERANGE;
1270
1271         sbi->ll_heat_decay_weight = (val * 256 + 50) / 100;
1272
1273         return count;
1274 }
1275 LUSTRE_RW_ATTR(heat_decay_percentage);
1276
1277 static ssize_t heat_period_second_show(struct kobject *kobj,
1278                                        struct attribute *attr,
1279                                        char *buf)
1280 {
1281         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1282                                               ll_kset.kobj);
1283
1284         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_heat_period_second);
1285 }
1286
1287 static ssize_t heat_period_second_store(struct kobject *kobj,
1288                                         struct attribute *attr,
1289                                         const char *buffer,
1290                                         size_t count)
1291 {
1292         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1293                                               ll_kset.kobj);
1294         unsigned long val;
1295         int rc;
1296
1297         rc = kstrtoul(buffer, 10, &val);
1298         if (rc)
1299                 return rc;
1300
1301         if (val <= 0)
1302                 return -ERANGE;
1303
1304         sbi->ll_heat_period_second = val;
1305
1306         return count;
1307 }
1308 LUSTRE_RW_ATTR(heat_period_second);
1309
1310 static int ll_unstable_stats_seq_show(struct seq_file *m, void *v)
1311 {
1312         struct super_block      *sb    = m->private;
1313         struct ll_sb_info       *sbi   = ll_s2sbi(sb);
1314         struct cl_client_cache  *cache = sbi->ll_cache;
1315         long pages;
1316         int mb;
1317
1318         pages = atomic_long_read(&cache->ccc_unstable_nr);
1319         mb    = (pages * PAGE_SIZE) >> 20;
1320
1321         seq_printf(m, "unstable_check:     %8d\n"
1322                       "unstable_pages: %12ld\n"
1323                       "unstable_mb:        %8d\n",
1324                    cache->ccc_unstable_check, pages, mb);
1325         return 0;
1326 }
1327
1328 static ssize_t ll_unstable_stats_seq_write(struct file *file,
1329                                            const char __user *buffer,
1330                                            size_t count, loff_t *unused)
1331 {
1332         struct seq_file *seq = file->private_data;
1333         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)seq->private);
1334         char kernbuf[128];
1335         bool val;
1336         int rc;
1337
1338         if (count == 0)
1339                 return 0;
1340         if (count >= sizeof(kernbuf))
1341                 return -EINVAL;
1342
1343         if (copy_from_user(kernbuf, buffer, count))
1344                 return -EFAULT;
1345         kernbuf[count] = 0;
1346
1347         buffer += lprocfs_find_named_value(kernbuf, "unstable_check:", &count) -
1348                   kernbuf;
1349         rc = kstrtobool_from_user(buffer, count, &val);
1350         if (rc < 0)
1351                 return rc;
1352
1353         /* borrow lru lock to set the value */
1354         spin_lock(&sbi->ll_cache->ccc_lru_lock);
1355         sbi->ll_cache->ccc_unstable_check = val;
1356         spin_unlock(&sbi->ll_cache->ccc_lru_lock);
1357
1358         return count;
1359 }
1360
1361 LDEBUGFS_SEQ_FOPS(ll_unstable_stats);
1362
1363 static int ll_root_squash_seq_show(struct seq_file *m, void *v)
1364 {
1365         struct super_block *sb = m->private;
1366         struct ll_sb_info *sbi = ll_s2sbi(sb);
1367         struct root_squash_info *squash = &sbi->ll_squash;
1368
1369         seq_printf(m, "%u:%u\n", squash->rsi_uid, squash->rsi_gid);
1370         return 0;
1371 }
1372
1373 static ssize_t ll_root_squash_seq_write(struct file *file,
1374                                         const char __user *buffer,
1375                                         size_t count, loff_t *off)
1376 {
1377         struct seq_file *m = file->private_data;
1378         struct super_block *sb = m->private;
1379         struct ll_sb_info *sbi = ll_s2sbi(sb);
1380         struct root_squash_info *squash = &sbi->ll_squash;
1381
1382         return lprocfs_wr_root_squash(buffer, count, squash, sbi->ll_fsname);
1383 }
1384
1385 LDEBUGFS_SEQ_FOPS(ll_root_squash);
1386
1387 static int ll_nosquash_nids_seq_show(struct seq_file *m, void *v)
1388 {
1389         struct super_block *sb = m->private;
1390         struct ll_sb_info *sbi = ll_s2sbi(sb);
1391         struct root_squash_info *squash = &sbi->ll_squash;
1392         int len;
1393
1394         spin_lock(&squash->rsi_lock);
1395         if (!list_empty(&squash->rsi_nosquash_nids)) {
1396                 len = cfs_print_nidlist(m->buf + m->count, m->size - m->count,
1397                                         &squash->rsi_nosquash_nids);
1398                 m->count += len;
1399                 seq_putc(m, '\n');
1400         } else {
1401                 seq_puts(m, "NONE\n");
1402         }
1403         spin_unlock(&squash->rsi_lock);
1404
1405         return 0;
1406 }
1407
1408 static ssize_t ll_nosquash_nids_seq_write(struct file *file,
1409                                           const char __user *buffer,
1410                                           size_t count, loff_t *off)
1411 {
1412         struct seq_file *m = file->private_data;
1413         struct super_block *sb = m->private;
1414         struct ll_sb_info *sbi = ll_s2sbi(sb);
1415         struct root_squash_info *squash = &sbi->ll_squash;
1416         int rc;
1417
1418         rc = lprocfs_wr_nosquash_nids(buffer, count, squash, sbi->ll_fsname);
1419         if (rc < 0)
1420                 return rc;
1421
1422         ll_compute_rootsquash_state(sbi);
1423
1424         return rc;
1425 }
1426
1427 LDEBUGFS_SEQ_FOPS(ll_nosquash_nids);
1428
1429 static int ll_pcc_seq_show(struct seq_file *m, void *v)
1430 {
1431         struct super_block *sb = m->private;
1432         struct ll_sb_info *sbi = ll_s2sbi(sb);
1433
1434         return pcc_super_dump(&sbi->ll_pcc_super, m);
1435 }
1436
1437 static ssize_t ll_pcc_seq_write(struct file *file, const char __user *buffer,
1438                                 size_t count, loff_t *off)
1439 {
1440         struct seq_file *m = file->private_data;
1441         struct super_block *sb = m->private;
1442         struct ll_sb_info *sbi = ll_s2sbi(sb);
1443         int rc;
1444         char *kernbuf;
1445
1446         if (count >= LPROCFS_WR_PCC_MAX_CMD)
1447                 return -EINVAL;
1448
1449         if (!(exp_connect_flags2(sbi->ll_md_exp) & OBD_CONNECT2_PCC))
1450                 return -EOPNOTSUPP;
1451
1452         OBD_ALLOC(kernbuf, count + 1);
1453         if (kernbuf == NULL)
1454                 return -ENOMEM;
1455
1456         if (copy_from_user(kernbuf, buffer, count))
1457                 GOTO(out_free_kernbuff, rc = -EFAULT);
1458
1459         rc = pcc_cmd_handle(kernbuf, count, &sbi->ll_pcc_super);
1460 out_free_kernbuff:
1461         OBD_FREE(kernbuf, count + 1);
1462         return rc ? rc : count;
1463 }
1464 LPROC_SEQ_FOPS(ll_pcc);
1465
1466 struct lprocfs_vars lprocfs_llite_obd_vars[] = {
1467         { .name =       "site",
1468           .fops =       &ll_site_stats_fops                     },
1469         { .name =       "max_read_ahead_mb",
1470           .fops =       &ll_max_readahead_mb_fops               },
1471         { .name =       "max_read_ahead_per_file_mb",
1472           .fops =       &ll_max_readahead_per_file_mb_fops      },
1473         { .name =       "max_read_ahead_whole_mb",
1474           .fops =       &ll_max_read_ahead_whole_mb_fops        },
1475         { .name =       "max_cached_mb",
1476           .fops =       &ll_max_cached_mb_fops                  },
1477         { .name =       "statahead_stats",
1478           .fops =       &ll_statahead_stats_fops                },
1479         { .name =       "unstable_stats",
1480           .fops =       &ll_unstable_stats_fops                 },
1481         { .name =       "sbi_flags",
1482           .fops =       &ll_sbi_flags_fops                      },
1483         { .name =       "root_squash",
1484           .fops =       &ll_root_squash_fops                    },
1485         { .name =       "nosquash_nids",
1486           .fops =       &ll_nosquash_nids_fops                  },
1487         { .name =       "pcc",
1488           .fops =       &ll_pcc_fops,                           },
1489         { NULL }
1490 };
1491
1492 #define MAX_STRING_SIZE 128
1493
1494 static struct attribute *llite_attrs[] = {
1495         &lustre_attr_blocksize.attr,
1496         &lustre_attr_stat_blocksize.attr,
1497         &lustre_attr_kbytestotal.attr,
1498         &lustre_attr_kbytesfree.attr,
1499         &lustre_attr_kbytesavail.attr,
1500         &lustre_attr_filestotal.attr,
1501         &lustre_attr_filesfree.attr,
1502         &lustre_attr_client_type.attr,
1503         &lustre_attr_fstype.attr,
1504         &lustre_attr_uuid.attr,
1505         &lustre_attr_checksums.attr,
1506         &lustre_attr_checksum_pages.attr,
1507         &lustre_attr_stats_track_pid.attr,
1508         &lustre_attr_stats_track_ppid.attr,
1509         &lustre_attr_stats_track_gid.attr,
1510         &lustre_attr_statahead_running_max.attr,
1511         &lustre_attr_statahead_max.attr,
1512         &lustre_attr_statahead_agl.attr,
1513         &lustre_attr_lazystatfs.attr,
1514         &lustre_attr_statfs_max_age.attr,
1515         &lustre_attr_max_easize.attr,
1516         &lustre_attr_default_easize.attr,
1517         &lustre_attr_xattr_cache.attr,
1518         &lustre_attr_fast_read.attr,
1519         &lustre_attr_tiny_write.attr,
1520         &lustre_attr_file_heat.attr,
1521         &lustre_attr_heat_decay_percentage.attr,
1522         &lustre_attr_heat_period_second.attr,
1523         &lustre_attr_max_read_ahead_async_active.attr,
1524         &lustre_attr_read_ahead_async_file_threshold_mb.attr,
1525         NULL,
1526 };
1527
1528 static void sbi_kobj_release(struct kobject *kobj)
1529 {
1530         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1531                                               ll_kset.kobj);
1532         complete(&sbi->ll_kobj_unregister);
1533 }
1534
1535 static struct kobj_type sbi_ktype = {
1536         .default_attrs  = llite_attrs,
1537         .sysfs_ops      = &lustre_sysfs_ops,
1538         .release        = sbi_kobj_release,
1539 };
1540
1541 #define LPROCFS_TYPE_LATENCY \
1542         (LPROCFS_TYPE_USEC | LPROCFS_CNTR_AVGMINMAX | LPROCFS_CNTR_STDDEV)
1543 static const struct llite_file_opcode {
1544         __u32           opcode;
1545         __u32           type;
1546         const char      *opname;
1547 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
1548         /* file operation */
1549         { LPROC_LL_READ_BYTES,  LPROCFS_CNTR_AVGMINMAX | LPROCFS_TYPE_BYTES,
1550                 "read_bytes" },
1551         { LPROC_LL_WRITE_BYTES, LPROCFS_CNTR_AVGMINMAX | LPROCFS_TYPE_BYTES,
1552                 "write_bytes" },
1553         { LPROC_LL_READ,        LPROCFS_TYPE_LATENCY,   "read" },
1554         { LPROC_LL_WRITE,       LPROCFS_TYPE_LATENCY,   "write" },
1555         { LPROC_LL_IOCTL,       LPROCFS_TYPE_REQS,      "ioctl" },
1556         { LPROC_LL_OPEN,        LPROCFS_TYPE_LATENCY,   "open" },
1557         { LPROC_LL_RELEASE,     LPROCFS_TYPE_LATENCY,   "close" },
1558         { LPROC_LL_MMAP,        LPROCFS_TYPE_LATENCY,   "mmap" },
1559         { LPROC_LL_FAULT,       LPROCFS_TYPE_LATENCY,   "page_fault" },
1560         { LPROC_LL_MKWRITE,     LPROCFS_TYPE_LATENCY,   "page_mkwrite" },
1561         { LPROC_LL_LLSEEK,      LPROCFS_TYPE_LATENCY,   "seek" },
1562         { LPROC_LL_FSYNC,       LPROCFS_TYPE_LATENCY,   "fsync" },
1563         { LPROC_LL_READDIR,     LPROCFS_TYPE_LATENCY,   "readdir" },
1564         /* inode operation */
1565         { LPROC_LL_SETATTR,     LPROCFS_TYPE_LATENCY,   "setattr" },
1566         { LPROC_LL_TRUNC,       LPROCFS_TYPE_LATENCY,   "truncate" },
1567         { LPROC_LL_FLOCK,       LPROCFS_TYPE_LATENCY,   "flock" },
1568         { LPROC_LL_GETATTR,     LPROCFS_TYPE_LATENCY,   "getattr" },
1569         /* dir inode operation */
1570         { LPROC_LL_CREATE,      LPROCFS_TYPE_LATENCY,   "create" },
1571         { LPROC_LL_LINK,        LPROCFS_TYPE_LATENCY,   "link" },
1572         { LPROC_LL_UNLINK,      LPROCFS_TYPE_LATENCY,   "unlink" },
1573         { LPROC_LL_SYMLINK,     LPROCFS_TYPE_LATENCY,   "symlink" },
1574         { LPROC_LL_MKDIR,       LPROCFS_TYPE_LATENCY,   "mkdir" },
1575         { LPROC_LL_RMDIR,       LPROCFS_TYPE_LATENCY,   "rmdir" },
1576         { LPROC_LL_MKNOD,       LPROCFS_TYPE_LATENCY,   "mknod" },
1577         { LPROC_LL_RENAME,      LPROCFS_TYPE_LATENCY,   "rename" },
1578         /* special inode operation */
1579         { LPROC_LL_STATFS,      LPROCFS_TYPE_LATENCY,   "statfs" },
1580         { LPROC_LL_SETXATTR,    LPROCFS_TYPE_LATENCY,   "setxattr" },
1581         { LPROC_LL_GETXATTR,    LPROCFS_TYPE_LATENCY,   "getxattr" },
1582         { LPROC_LL_GETXATTR_HITS, LPROCFS_TYPE_REQS,    "getxattr_hits" },
1583         { LPROC_LL_LISTXATTR,   LPROCFS_TYPE_LATENCY,   "listxattr" },
1584         { LPROC_LL_REMOVEXATTR, LPROCFS_TYPE_LATENCY,   "removexattr" },
1585         { LPROC_LL_INODE_PERM,  LPROCFS_TYPE_LATENCY,   "inode_permission" },
1586 };
1587
1588 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, long count)
1589 {
1590         if (!sbi->ll_stats)
1591                 return;
1592
1593         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
1594                 lprocfs_counter_add(sbi->ll_stats, op, count);
1595         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
1596                  sbi->ll_stats_track_id == current->pid)
1597                 lprocfs_counter_add(sbi->ll_stats, op, count);
1598         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
1599                  sbi->ll_stats_track_id == current->parent->pid)
1600                 lprocfs_counter_add(sbi->ll_stats, op, count);
1601         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
1602                  sbi->ll_stats_track_id ==
1603                         from_kgid(&init_user_ns, current_gid()))
1604                 lprocfs_counter_add(sbi->ll_stats, op, count);
1605 }
1606 EXPORT_SYMBOL(ll_stats_ops_tally);
1607
1608 static const char *ra_stat_string[] = {
1609         [RA_STAT_HIT] = "hits",
1610         [RA_STAT_MISS] = "misses",
1611         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
1612         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
1613         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
1614         [RA_STAT_FAILED_MATCH] = "failed lock match",
1615         [RA_STAT_DISCARDED] = "read but discarded",
1616         [RA_STAT_ZERO_LEN] = "zero length file",
1617         [RA_STAT_ZERO_WINDOW] = "zero size window",
1618         [RA_STAT_EOF] = "read-ahead to EOF",
1619         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
1620         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
1621         [RA_STAT_FAILED_REACH_END] = "failed to reach end",
1622         [RA_STAT_ASYNC] = "async readahead",
1623         [RA_STAT_FAILED_FAST_READ] = "failed to fast read",
1624 };
1625
1626 int ll_debugfs_register_super(struct super_block *sb, const char *name)
1627 {
1628         struct lustre_sb_info *lsi = s2lsi(sb);
1629         struct ll_sb_info *sbi = ll_s2sbi(sb);
1630         int err, id, rc;
1631
1632         ENTRY;
1633         LASSERT(sbi);
1634
1635         if (IS_ERR_OR_NULL(llite_root))
1636                 goto out_ll_kset;
1637
1638         sbi->ll_debugfs_entry = ldebugfs_register(name, llite_root,
1639                                                   lprocfs_llite_obd_vars, sb);
1640         if (IS_ERR_OR_NULL(sbi->ll_debugfs_entry)) {
1641                 err = sbi->ll_debugfs_entry ? PTR_ERR(sbi->ll_debugfs_entry) :
1642                                               -ENOMEM;
1643                 sbi->ll_debugfs_entry = NULL;
1644                 RETURN(err);
1645         }
1646
1647         rc = ldebugfs_seq_create(sbi->ll_debugfs_entry, "dump_page_cache",0444,
1648                                  &vvp_dump_pgcache_file_ops, sbi);
1649         if (rc)
1650                 CWARN("Error adding the dump_page_cache file\n");
1651
1652         rc = ldebugfs_seq_create(sbi->ll_debugfs_entry, "extents_stats", 0644,
1653                                  &ll_rw_extents_stats_fops, sbi);
1654         if (rc)
1655                 CWARN("Error adding the extent_stats file\n");
1656
1657         rc = ldebugfs_seq_create(sbi->ll_debugfs_entry,
1658                                  "extents_stats_per_process", 0644,
1659                                  &ll_rw_extents_stats_pp_fops, sbi);
1660         if (rc)
1661                 CWARN("Error adding the extents_stats_per_process file\n");
1662
1663         rc = ldebugfs_seq_create(sbi->ll_debugfs_entry, "offset_stats", 0644,
1664                                  &ll_rw_offset_stats_fops, sbi);
1665         if (rc)
1666                 CWARN("Error adding the offset_stats file\n");
1667
1668         /* File operations stats */
1669         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
1670                                             LPROCFS_STATS_FLAG_NONE);
1671         if (sbi->ll_stats == NULL)
1672                 GOTO(out_debugfs, err = -ENOMEM);
1673
1674         /* do counter init */
1675         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
1676                 u32 type = llite_opcode_table[id].type;
1677                 void *ptr = NULL;
1678
1679                 if (type & LPROCFS_TYPE_REQS)
1680                         ptr = "reqs";
1681                 else if (type & LPROCFS_TYPE_BYTES)
1682                         ptr = "bytes";
1683                 else if (type & LPROCFS_TYPE_PAGES)
1684                         ptr = "pages";
1685                 else if (type & LPROCFS_TYPE_USEC)
1686                         ptr = "usec";
1687                 lprocfs_counter_init(sbi->ll_stats,
1688                                      llite_opcode_table[id].opcode,
1689                                      (type & LPROCFS_CNTR_AVGMINMAX),
1690                                      llite_opcode_table[id].opname, ptr);
1691         }
1692
1693         err = ldebugfs_register_stats(sbi->ll_debugfs_entry, "stats",
1694                                       sbi->ll_stats);
1695         if (err)
1696                 GOTO(out_stats, err);
1697
1698         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
1699                                                LPROCFS_STATS_FLAG_NONE);
1700         if (sbi->ll_ra_stats == NULL)
1701                 GOTO(out_stats, err = -ENOMEM);
1702
1703         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
1704                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
1705                                      ra_stat_string[id], "pages");
1706
1707         err = ldebugfs_register_stats(sbi->ll_debugfs_entry, "read_ahead_stats",
1708                                       sbi->ll_ra_stats);
1709         if (err)
1710                 GOTO(out_ra_stats, err);
1711
1712 out_ll_kset:
1713         /* Yes we also register sysfs mount kset here as well */
1714         sbi->ll_kset.kobj.parent = llite_kobj;
1715         sbi->ll_kset.kobj.ktype = &sbi_ktype;
1716         init_completion(&sbi->ll_kobj_unregister);
1717         err = kobject_set_name(&sbi->ll_kset.kobj, "%s", name);
1718         if (err)
1719                 GOTO(out_ra_stats, err);
1720
1721         err = kset_register(&sbi->ll_kset);
1722         if (err)
1723                 GOTO(out_ra_stats, err);
1724
1725         lsi->lsi_kobj = kobject_get(&sbi->ll_kset.kobj);
1726
1727         RETURN(0);
1728 out_ra_stats:
1729         lprocfs_free_stats(&sbi->ll_ra_stats);
1730 out_stats:
1731         lprocfs_free_stats(&sbi->ll_stats);
1732 out_debugfs:
1733         ldebugfs_remove(&sbi->ll_debugfs_entry);
1734
1735         RETURN(err);
1736 }
1737
1738 void ll_debugfs_unregister_super(struct super_block *sb)
1739 {
1740         struct lustre_sb_info *lsi = s2lsi(sb);
1741         struct ll_sb_info *sbi = ll_s2sbi(sb);
1742
1743         if (!IS_ERR_OR_NULL(sbi->ll_debugfs_entry))
1744                 ldebugfs_remove(&sbi->ll_debugfs_entry);
1745
1746         if (sbi->ll_dt_obd)
1747                 sysfs_remove_link(&sbi->ll_kset.kobj,
1748                                   sbi->ll_dt_obd->obd_type->typ_name);
1749
1750         if (sbi->ll_md_obd)
1751                 sysfs_remove_link(&sbi->ll_kset.kobj,
1752                                   sbi->ll_md_obd->obd_type->typ_name);
1753
1754         kobject_put(lsi->lsi_kobj);
1755
1756         kset_unregister(&sbi->ll_kset);
1757         wait_for_completion(&sbi->ll_kobj_unregister);
1758
1759         lprocfs_free_stats(&sbi->ll_ra_stats);
1760         lprocfs_free_stats(&sbi->ll_stats);
1761 }
1762 #undef MAX_STRING_SIZE
1763
1764 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1765                                    struct seq_file *seq, int which)
1766 {
1767         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1768         unsigned long start, end, r, w;
1769         char *unitp = "KMGTPEZY";
1770         int i, units = 10;
1771         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1772
1773         read_cum = 0;
1774         write_cum = 0;
1775         start = 0;
1776
1777         for(i = 0; i < LL_HIST_MAX; i++) {
1778                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1779                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1780         }
1781
1782         for(i = 0; i < LL_HIST_MAX; i++) {
1783                 r = pp_info->pp_r_hist.oh_buckets[i];
1784                 w = pp_info->pp_w_hist.oh_buckets[i];
1785                 read_cum += r;
1786                 write_cum += w;
1787                 end = BIT(i + LL_HIST_START - units);
1788                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4u %4u  | "
1789                            "%14lu %4u %4u\n", start, *unitp, end, *unitp,
1790                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1791                            r, pct(r, read_tot), pct(read_cum, read_tot),
1792                            w, pct(w, write_tot), pct(write_cum, write_tot));
1793                 start = end;
1794                 if (start == BIT(10)) {
1795                         start = 1;
1796                         units += 10;
1797                         unitp++;
1798                 }
1799                 if (read_cum == read_tot && write_cum == write_tot)
1800                         break;
1801         }
1802 }
1803
1804 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1805 {
1806         struct timespec64 now;
1807         struct ll_sb_info *sbi = seq->private;
1808         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1809         int k;
1810
1811         ktime_get_real_ts64(&now);
1812
1813         if (!sbi->ll_rw_stats_on) {
1814                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
1815                 return 0;
1816         }
1817         seq_printf(seq, "snapshot_time:         %llu.%09lu (secs.nsecs)\n",
1818                    (s64)now.tv_sec, now.tv_nsec);
1819         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1820         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1821                    "extents", "calls", "%", "cum%",
1822                    "calls", "%", "cum%");
1823         spin_lock(&sbi->ll_pp_extent_lock);
1824         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1825                 if (io_extents->pp_extents[k].pid != 0) {
1826                         seq_printf(seq, "\nPID: %d\n",
1827                                    io_extents->pp_extents[k].pid);
1828                         ll_display_extents_info(io_extents, seq, k);
1829                 }
1830         }
1831         spin_unlock(&sbi->ll_pp_extent_lock);
1832         return 0;
1833 }
1834
1835 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1836                                                 const char __user *buf,
1837                                                 size_t len,
1838                                                 loff_t *off)
1839 {
1840         struct seq_file *seq = file->private_data;
1841         struct ll_sb_info *sbi = seq->private;
1842         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1843         int i;
1844         __s64 value;
1845
1846         if (len == 0)
1847                 return -EINVAL;
1848
1849         value = ll_stats_pid_write(buf, len);
1850
1851         if (value == 0)
1852                 sbi->ll_rw_stats_on = 0;
1853         else
1854                 sbi->ll_rw_stats_on = 1;
1855
1856         spin_lock(&sbi->ll_pp_extent_lock);
1857         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1858                 io_extents->pp_extents[i].pid = 0;
1859                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1860                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1861         }
1862         spin_unlock(&sbi->ll_pp_extent_lock);
1863         return len;
1864 }
1865
1866 LDEBUGFS_SEQ_FOPS(ll_rw_extents_stats_pp);
1867
1868 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1869 {
1870         struct timespec64 now;
1871         struct ll_sb_info *sbi = seq->private;
1872         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1873
1874         ktime_get_real_ts64(&now);
1875
1876         if (!sbi->ll_rw_stats_on) {
1877                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
1878                 return 0;
1879         }
1880         seq_printf(seq, "snapshot_time:         %llu.%09lu (secs.nsecs)\n",
1881                    (s64)now.tv_sec, now.tv_nsec);
1882
1883         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1884         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1885                    "extents", "calls", "%", "cum%",
1886                    "calls", "%", "cum%");
1887         spin_lock(&sbi->ll_lock);
1888         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1889         spin_unlock(&sbi->ll_lock);
1890
1891         return 0;
1892 }
1893
1894 static ssize_t ll_rw_extents_stats_seq_write(struct file *file,
1895                                              const char __user *buf,
1896                                              size_t len, loff_t *off)
1897 {
1898         struct seq_file *seq = file->private_data;
1899         struct ll_sb_info *sbi = seq->private;
1900         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1901         int i;
1902         __s64 value;
1903
1904         if (len == 0)
1905                 return -EINVAL;
1906
1907         value = ll_stats_pid_write(buf, len);
1908
1909         if (value == 0)
1910                 sbi->ll_rw_stats_on = 0;
1911         else
1912                 sbi->ll_rw_stats_on = 1;
1913
1914         spin_lock(&sbi->ll_pp_extent_lock);
1915         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1916                 io_extents->pp_extents[i].pid = 0;
1917                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1918                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1919         }
1920         spin_unlock(&sbi->ll_pp_extent_lock);
1921
1922         return len;
1923 }
1924
1925 LDEBUGFS_SEQ_FOPS(ll_rw_extents_stats);
1926
1927 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1928                        struct ll_file_data *file, loff_t pos,
1929                        size_t count, int rw)
1930 {
1931         int i, cur = -1;
1932         struct ll_rw_process_info *process;
1933         struct ll_rw_process_info *offset;
1934         int *off_count = &sbi->ll_rw_offset_entry_count;
1935         int *process_count = &sbi->ll_offset_process_count;
1936         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1937
1938         if(!sbi->ll_rw_stats_on)
1939                 return;
1940         process = sbi->ll_rw_process_info;
1941         offset = sbi->ll_rw_offset_info;
1942
1943         spin_lock(&sbi->ll_pp_extent_lock);
1944         /* Extent statistics */
1945         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1946                 if(io_extents->pp_extents[i].pid == pid) {
1947                         cur = i;
1948                         break;
1949                 }
1950         }
1951
1952         if (cur == -1) {
1953                 /* new process */
1954                 sbi->ll_extent_process_count =
1955                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1956                 cur = sbi->ll_extent_process_count;
1957                 io_extents->pp_extents[cur].pid = pid;
1958                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1959                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1960         }
1961
1962         for (i = 0; (count >= BIT(LL_HIST_START + i)) &&
1963              (i < (LL_HIST_MAX - 1)); i++);
1964         if (rw == 0) {
1965                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1966                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1967         } else {
1968                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1969                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1970         }
1971         spin_unlock(&sbi->ll_pp_extent_lock);
1972
1973         spin_lock(&sbi->ll_process_lock);
1974         /* Offset statistics */
1975         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1976                 if (process[i].rw_pid == pid) {
1977                         if (process[i].rw_last_file != file) {
1978                                 process[i].rw_range_start = pos;
1979                                 process[i].rw_last_file_pos = pos + count;
1980                                 process[i].rw_smallest_extent = count;
1981                                 process[i].rw_largest_extent = count;
1982                                 process[i].rw_offset = 0;
1983                                 process[i].rw_last_file = file;
1984                                 spin_unlock(&sbi->ll_process_lock);
1985                                 return;
1986                         }
1987                         if (process[i].rw_last_file_pos != pos) {
1988                                 *off_count =
1989                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1990                                 offset[*off_count].rw_op = process[i].rw_op;
1991                                 offset[*off_count].rw_pid = pid;
1992                                 offset[*off_count].rw_range_start =
1993                                         process[i].rw_range_start;
1994                                 offset[*off_count].rw_range_end =
1995                                         process[i].rw_last_file_pos;
1996                                 offset[*off_count].rw_smallest_extent =
1997                                         process[i].rw_smallest_extent;
1998                                 offset[*off_count].rw_largest_extent =
1999                                         process[i].rw_largest_extent;
2000                                 offset[*off_count].rw_offset =
2001                                         process[i].rw_offset;
2002                                 process[i].rw_op = rw;
2003                                 process[i].rw_range_start = pos;
2004                                 process[i].rw_smallest_extent = count;
2005                                 process[i].rw_largest_extent = count;
2006                                 process[i].rw_offset = pos -
2007                                         process[i].rw_last_file_pos;
2008                         }
2009                         if(process[i].rw_smallest_extent > count)
2010                                 process[i].rw_smallest_extent = count;
2011                         if(process[i].rw_largest_extent < count)
2012                                 process[i].rw_largest_extent = count;
2013                         process[i].rw_last_file_pos = pos + count;
2014                         spin_unlock(&sbi->ll_process_lock);
2015                         return;
2016                 }
2017         }
2018         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
2019         process[*process_count].rw_pid = pid;
2020         process[*process_count].rw_op = rw;
2021         process[*process_count].rw_range_start = pos;
2022         process[*process_count].rw_last_file_pos = pos + count;
2023         process[*process_count].rw_smallest_extent = count;
2024         process[*process_count].rw_largest_extent = count;
2025         process[*process_count].rw_offset = 0;
2026         process[*process_count].rw_last_file = file;
2027         spin_unlock(&sbi->ll_process_lock);
2028 }
2029
2030 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
2031 {
2032         struct timespec64 now;
2033         struct ll_sb_info *sbi = seq->private;
2034         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
2035         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
2036         int i;
2037
2038         ktime_get_real_ts64(&now);
2039
2040         if (!sbi->ll_rw_stats_on) {
2041                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
2042                 return 0;
2043         }
2044         spin_lock(&sbi->ll_process_lock);
2045
2046         seq_printf(seq, "snapshot_time:         %llu.%09lu (secs.nsecs)\n",
2047                    (s64)now.tv_sec, now.tv_nsec);
2048         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
2049                    "R/W", "PID", "RANGE START", "RANGE END",
2050                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
2051
2052         /* We stored the discontiguous offsets here; print them first */
2053         for (i = 0; i < LL_OFFSET_HIST_MAX; i++) {
2054                 if (offset[i].rw_pid != 0)
2055                         seq_printf(seq,
2056                                   "%3c %10d %14llu %14llu %17lu %17lu %14lld\n",
2057                                    offset[i].rw_op == READ ? 'R' : 'W',
2058                                    offset[i].rw_pid,
2059                                    offset[i].rw_range_start,
2060                                    offset[i].rw_range_end,
2061                                    (unsigned long)offset[i].rw_smallest_extent,
2062                                    (unsigned long)offset[i].rw_largest_extent,
2063                                    offset[i].rw_offset);
2064         }
2065
2066         /* Then print the current offsets for each process */
2067         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
2068                 if (process[i].rw_pid != 0)
2069                         seq_printf(seq,
2070                                   "%3c %10d %14llu %14llu %17lu %17lu %14lld\n",
2071                                    process[i].rw_op == READ ? 'R' : 'W',
2072                                    process[i].rw_pid,
2073                                    process[i].rw_range_start,
2074                                    process[i].rw_last_file_pos,
2075                                    (unsigned long)process[i].rw_smallest_extent,
2076                                    (unsigned long)process[i].rw_largest_extent,
2077                                    process[i].rw_offset);
2078         }
2079         spin_unlock(&sbi->ll_process_lock);
2080
2081         return 0;
2082 }
2083
2084 static ssize_t ll_rw_offset_stats_seq_write(struct file *file,
2085                                             const char __user *buf,
2086                                             size_t len, loff_t *off)
2087 {
2088         struct seq_file *seq = file->private_data;
2089         struct ll_sb_info *sbi = seq->private;
2090         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
2091         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
2092         __s64 value;
2093
2094         if (len == 0)
2095                 return -EINVAL;
2096
2097         value = ll_stats_pid_write(buf, len);
2098
2099         if (value == 0)
2100                 sbi->ll_rw_stats_on = 0;
2101         else
2102                 sbi->ll_rw_stats_on = 1;
2103
2104         spin_lock(&sbi->ll_process_lock);
2105         sbi->ll_offset_process_count = 0;
2106         sbi->ll_rw_offset_entry_count = 0;
2107         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
2108                LL_PROCESS_HIST_MAX);
2109         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
2110                LL_OFFSET_HIST_MAX);
2111         spin_unlock(&sbi->ll_process_lock);
2112
2113         return len;
2114 }
2115
2116 LDEBUGFS_SEQ_FOPS(ll_rw_offset_stats);