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20#include <linux/kobject.h>
21
22#include "nilfs.h"
23#include "mdt.h"
24#include "sufile.h"
25#include "cpfile.h"
26#include "sysfs.h"
27
28
29static struct kset *nilfs_kset;
30
31#define NILFS_SHOW_TIME(time_t_val, buf) ({ \
32 struct tm res; \
33 int count = 0; \
34 time_to_tm(time_t_val, 0, &res); \
35 res.tm_year += 1900; \
36 res.tm_mon += 1; \
37 count = scnprintf(buf, PAGE_SIZE, \
38 "%ld-%.2d-%.2d %.2d:%.2d:%.2d\n", \
39 res.tm_year, res.tm_mon, res.tm_mday, \
40 res.tm_hour, res.tm_min, res.tm_sec);\
41 count; \
42})
43
44#define NILFS_DEV_INT_GROUP_OPS(name, parent_name) \
45static ssize_t nilfs_##name##_attr_show(struct kobject *kobj, \
46 struct attribute *attr, char *buf) \
47{ \
48 struct the_nilfs *nilfs = container_of(kobj->parent, \
49 struct the_nilfs, \
50 ns_##parent_name##_kobj); \
51 struct nilfs_##name##_attr *a = container_of(attr, \
52 struct nilfs_##name##_attr, \
53 attr); \
54 return a->show ? a->show(a, nilfs, buf) : 0; \
55} \
56static ssize_t nilfs_##name##_attr_store(struct kobject *kobj, \
57 struct attribute *attr, \
58 const char *buf, size_t len) \
59{ \
60 struct the_nilfs *nilfs = container_of(kobj->parent, \
61 struct the_nilfs, \
62 ns_##parent_name##_kobj); \
63 struct nilfs_##name##_attr *a = container_of(attr, \
64 struct nilfs_##name##_attr, \
65 attr); \
66 return a->store ? a->store(a, nilfs, buf, len) : 0; \
67} \
68static const struct sysfs_ops nilfs_##name##_attr_ops = { \
69 .show = nilfs_##name##_attr_show, \
70 .store = nilfs_##name##_attr_store, \
71};
72
73#define NILFS_DEV_INT_GROUP_TYPE(name, parent_name) \
74static void nilfs_##name##_attr_release(struct kobject *kobj) \
75{ \
76 struct nilfs_sysfs_##parent_name##_subgroups *subgroups; \
77 struct the_nilfs *nilfs = container_of(kobj->parent, \
78 struct the_nilfs, \
79 ns_##parent_name##_kobj); \
80 subgroups = nilfs->ns_##parent_name##_subgroups; \
81 complete(&subgroups->sg_##name##_kobj_unregister); \
82} \
83static struct kobj_type nilfs_##name##_ktype = { \
84 .default_attrs = nilfs_##name##_attrs, \
85 .sysfs_ops = &nilfs_##name##_attr_ops, \
86 .release = nilfs_##name##_attr_release, \
87};
88
89#define NILFS_DEV_INT_GROUP_FNS(name, parent_name) \
90static int nilfs_sysfs_create_##name##_group(struct the_nilfs *nilfs) \
91{ \
92 struct kobject *parent; \
93 struct kobject *kobj; \
94 struct completion *kobj_unregister; \
95 struct nilfs_sysfs_##parent_name##_subgroups *subgroups; \
96 int err; \
97 subgroups = nilfs->ns_##parent_name##_subgroups; \
98 kobj = &subgroups->sg_##name##_kobj; \
99 kobj_unregister = &subgroups->sg_##name##_kobj_unregister; \
100 parent = &nilfs->ns_##parent_name##_kobj; \
101 kobj->kset = nilfs_kset; \
102 init_completion(kobj_unregister); \
103 err = kobject_init_and_add(kobj, &nilfs_##name##_ktype, parent, \
104 #name); \
105 if (err) \
106 return err; \
107 return 0; \
108} \
109static void nilfs_sysfs_delete_##name##_group(struct the_nilfs *nilfs) \
110{ \
111 kobject_del(&nilfs->ns_##parent_name##_subgroups->sg_##name##_kobj); \
112}
113
114
115
116
117
118static ssize_t
119nilfs_snapshot_inodes_count_show(struct nilfs_snapshot_attr *attr,
120 struct nilfs_root *root, char *buf)
121{
122 return snprintf(buf, PAGE_SIZE, "%llu\n",
123 (unsigned long long)atomic64_read(&root->inodes_count));
124}
125
126static ssize_t
127nilfs_snapshot_blocks_count_show(struct nilfs_snapshot_attr *attr,
128 struct nilfs_root *root, char *buf)
129{
130 return snprintf(buf, PAGE_SIZE, "%llu\n",
131 (unsigned long long)atomic64_read(&root->blocks_count));
132}
133
134static const char snapshot_readme_str[] =
135 "The group contains details about mounted snapshot.\n\n"
136 "(1) inodes_count\n\tshow number of inodes for snapshot.\n\n"
137 "(2) blocks_count\n\tshow number of blocks for snapshot.\n\n";
138
139static ssize_t
140nilfs_snapshot_README_show(struct nilfs_snapshot_attr *attr,
141 struct nilfs_root *root, char *buf)
142{
143 return snprintf(buf, PAGE_SIZE, snapshot_readme_str);
144}
145
146NILFS_SNAPSHOT_RO_ATTR(inodes_count);
147NILFS_SNAPSHOT_RO_ATTR(blocks_count);
148NILFS_SNAPSHOT_RO_ATTR(README);
149
150static struct attribute *nilfs_snapshot_attrs[] = {
151 NILFS_SNAPSHOT_ATTR_LIST(inodes_count),
152 NILFS_SNAPSHOT_ATTR_LIST(blocks_count),
153 NILFS_SNAPSHOT_ATTR_LIST(README),
154 NULL,
155};
156
157static ssize_t nilfs_snapshot_attr_show(struct kobject *kobj,
158 struct attribute *attr, char *buf)
159{
160 struct nilfs_root *root =
161 container_of(kobj, struct nilfs_root, snapshot_kobj);
162 struct nilfs_snapshot_attr *a =
163 container_of(attr, struct nilfs_snapshot_attr, attr);
164
165 return a->show ? a->show(a, root, buf) : 0;
166}
167
168static ssize_t nilfs_snapshot_attr_store(struct kobject *kobj,
169 struct attribute *attr,
170 const char *buf, size_t len)
171{
172 struct nilfs_root *root =
173 container_of(kobj, struct nilfs_root, snapshot_kobj);
174 struct nilfs_snapshot_attr *a =
175 container_of(attr, struct nilfs_snapshot_attr, attr);
176
177 return a->store ? a->store(a, root, buf, len) : 0;
178}
179
180static void nilfs_snapshot_attr_release(struct kobject *kobj)
181{
182 struct nilfs_root *root = container_of(kobj, struct nilfs_root,
183 snapshot_kobj);
184 complete(&root->snapshot_kobj_unregister);
185}
186
187static const struct sysfs_ops nilfs_snapshot_attr_ops = {
188 .show = nilfs_snapshot_attr_show,
189 .store = nilfs_snapshot_attr_store,
190};
191
192static struct kobj_type nilfs_snapshot_ktype = {
193 .default_attrs = nilfs_snapshot_attrs,
194 .sysfs_ops = &nilfs_snapshot_attr_ops,
195 .release = nilfs_snapshot_attr_release,
196};
197
198int nilfs_sysfs_create_snapshot_group(struct nilfs_root *root)
199{
200 struct the_nilfs *nilfs;
201 struct kobject *parent;
202 int err;
203
204 nilfs = root->nilfs;
205 parent = &nilfs->ns_dev_subgroups->sg_mounted_snapshots_kobj;
206 root->snapshot_kobj.kset = nilfs_kset;
207 init_completion(&root->snapshot_kobj_unregister);
208
209 if (root->cno == NILFS_CPTREE_CURRENT_CNO) {
210 err = kobject_init_and_add(&root->snapshot_kobj,
211 &nilfs_snapshot_ktype,
212 &nilfs->ns_dev_kobj,
213 "current_checkpoint");
214 } else {
215 err = kobject_init_and_add(&root->snapshot_kobj,
216 &nilfs_snapshot_ktype,
217 parent,
218 "%llu", root->cno);
219 }
220
221 if (err)
222 return err;
223
224 return 0;
225}
226
227void nilfs_sysfs_delete_snapshot_group(struct nilfs_root *root)
228{
229 kobject_del(&root->snapshot_kobj);
230}
231
232
233
234
235
236static const char mounted_snapshots_readme_str[] =
237 "The mounted_snapshots group contains group for\n"
238 "every mounted snapshot.\n";
239
240static ssize_t
241nilfs_mounted_snapshots_README_show(struct nilfs_mounted_snapshots_attr *attr,
242 struct the_nilfs *nilfs, char *buf)
243{
244 return snprintf(buf, PAGE_SIZE, mounted_snapshots_readme_str);
245}
246
247NILFS_MOUNTED_SNAPSHOTS_RO_ATTR(README);
248
249static struct attribute *nilfs_mounted_snapshots_attrs[] = {
250 NILFS_MOUNTED_SNAPSHOTS_ATTR_LIST(README),
251 NULL,
252};
253
254NILFS_DEV_INT_GROUP_OPS(mounted_snapshots, dev);
255NILFS_DEV_INT_GROUP_TYPE(mounted_snapshots, dev);
256NILFS_DEV_INT_GROUP_FNS(mounted_snapshots, dev);
257
258
259
260
261
262static ssize_t
263nilfs_checkpoints_checkpoints_number_show(struct nilfs_checkpoints_attr *attr,
264 struct the_nilfs *nilfs,
265 char *buf)
266{
267 __u64 ncheckpoints;
268 struct nilfs_cpstat cpstat;
269 int err;
270
271 down_read(&nilfs->ns_segctor_sem);
272 err = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
273 up_read(&nilfs->ns_segctor_sem);
274 if (err < 0) {
275 printk(KERN_ERR "NILFS: unable to get checkpoint stat: err=%d\n",
276 err);
277 return err;
278 }
279
280 ncheckpoints = cpstat.cs_ncps;
281
282 return snprintf(buf, PAGE_SIZE, "%llu\n", ncheckpoints);
283}
284
285static ssize_t
286nilfs_checkpoints_snapshots_number_show(struct nilfs_checkpoints_attr *attr,
287 struct the_nilfs *nilfs,
288 char *buf)
289{
290 __u64 nsnapshots;
291 struct nilfs_cpstat cpstat;
292 int err;
293
294 down_read(&nilfs->ns_segctor_sem);
295 err = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
296 up_read(&nilfs->ns_segctor_sem);
297 if (err < 0) {
298 printk(KERN_ERR "NILFS: unable to get checkpoint stat: err=%d\n",
299 err);
300 return err;
301 }
302
303 nsnapshots = cpstat.cs_nsss;
304
305 return snprintf(buf, PAGE_SIZE, "%llu\n", nsnapshots);
306}
307
308static ssize_t
309nilfs_checkpoints_last_seg_checkpoint_show(struct nilfs_checkpoints_attr *attr,
310 struct the_nilfs *nilfs,
311 char *buf)
312{
313 __u64 last_cno;
314
315 spin_lock(&nilfs->ns_last_segment_lock);
316 last_cno = nilfs->ns_last_cno;
317 spin_unlock(&nilfs->ns_last_segment_lock);
318
319 return snprintf(buf, PAGE_SIZE, "%llu\n", last_cno);
320}
321
322static ssize_t
323nilfs_checkpoints_next_checkpoint_show(struct nilfs_checkpoints_attr *attr,
324 struct the_nilfs *nilfs,
325 char *buf)
326{
327 __u64 cno;
328
329 down_read(&nilfs->ns_sem);
330 cno = nilfs->ns_cno;
331 up_read(&nilfs->ns_sem);
332
333 return snprintf(buf, PAGE_SIZE, "%llu\n", cno);
334}
335
336static const char checkpoints_readme_str[] =
337 "The checkpoints group contains attributes that describe\n"
338 "details about volume's checkpoints.\n\n"
339 "(1) checkpoints_number\n\tshow number of checkpoints on volume.\n\n"
340 "(2) snapshots_number\n\tshow number of snapshots on volume.\n\n"
341 "(3) last_seg_checkpoint\n"
342 "\tshow checkpoint number of the latest segment.\n\n"
343 "(4) next_checkpoint\n\tshow next checkpoint number.\n\n";
344
345static ssize_t
346nilfs_checkpoints_README_show(struct nilfs_checkpoints_attr *attr,
347 struct the_nilfs *nilfs, char *buf)
348{
349 return snprintf(buf, PAGE_SIZE, checkpoints_readme_str);
350}
351
352NILFS_CHECKPOINTS_RO_ATTR(checkpoints_number);
353NILFS_CHECKPOINTS_RO_ATTR(snapshots_number);
354NILFS_CHECKPOINTS_RO_ATTR(last_seg_checkpoint);
355NILFS_CHECKPOINTS_RO_ATTR(next_checkpoint);
356NILFS_CHECKPOINTS_RO_ATTR(README);
357
358static struct attribute *nilfs_checkpoints_attrs[] = {
359 NILFS_CHECKPOINTS_ATTR_LIST(checkpoints_number),
360 NILFS_CHECKPOINTS_ATTR_LIST(snapshots_number),
361 NILFS_CHECKPOINTS_ATTR_LIST(last_seg_checkpoint),
362 NILFS_CHECKPOINTS_ATTR_LIST(next_checkpoint),
363 NILFS_CHECKPOINTS_ATTR_LIST(README),
364 NULL,
365};
366
367NILFS_DEV_INT_GROUP_OPS(checkpoints, dev);
368NILFS_DEV_INT_GROUP_TYPE(checkpoints, dev);
369NILFS_DEV_INT_GROUP_FNS(checkpoints, dev);
370
371
372
373
374
375static ssize_t
376nilfs_segments_segments_number_show(struct nilfs_segments_attr *attr,
377 struct the_nilfs *nilfs,
378 char *buf)
379{
380 return snprintf(buf, PAGE_SIZE, "%lu\n", nilfs->ns_nsegments);
381}
382
383static ssize_t
384nilfs_segments_blocks_per_segment_show(struct nilfs_segments_attr *attr,
385 struct the_nilfs *nilfs,
386 char *buf)
387{
388 return snprintf(buf, PAGE_SIZE, "%lu\n", nilfs->ns_blocks_per_segment);
389}
390
391static ssize_t
392nilfs_segments_clean_segments_show(struct nilfs_segments_attr *attr,
393 struct the_nilfs *nilfs,
394 char *buf)
395{
396 unsigned long ncleansegs;
397
398 down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
399 ncleansegs = nilfs_sufile_get_ncleansegs(nilfs->ns_sufile);
400 up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
401
402 return snprintf(buf, PAGE_SIZE, "%lu\n", ncleansegs);
403}
404
405static ssize_t
406nilfs_segments_dirty_segments_show(struct nilfs_segments_attr *attr,
407 struct the_nilfs *nilfs,
408 char *buf)
409{
410 struct nilfs_sustat sustat;
411 int err;
412
413 down_read(&nilfs->ns_segctor_sem);
414 err = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat);
415 up_read(&nilfs->ns_segctor_sem);
416 if (err < 0) {
417 printk(KERN_ERR "NILFS: unable to get segment stat: err=%d\n",
418 err);
419 return err;
420 }
421
422 return snprintf(buf, PAGE_SIZE, "%llu\n", sustat.ss_ndirtysegs);
423}
424
425static const char segments_readme_str[] =
426 "The segments group contains attributes that describe\n"
427 "details about volume's segments.\n\n"
428 "(1) segments_number\n\tshow number of segments on volume.\n\n"
429 "(2) blocks_per_segment\n\tshow number of blocks in segment.\n\n"
430 "(3) clean_segments\n\tshow count of clean segments.\n\n"
431 "(4) dirty_segments\n\tshow count of dirty segments.\n\n";
432
433static ssize_t
434nilfs_segments_README_show(struct nilfs_segments_attr *attr,
435 struct the_nilfs *nilfs,
436 char *buf)
437{
438 return snprintf(buf, PAGE_SIZE, segments_readme_str);
439}
440
441NILFS_SEGMENTS_RO_ATTR(segments_number);
442NILFS_SEGMENTS_RO_ATTR(blocks_per_segment);
443NILFS_SEGMENTS_RO_ATTR(clean_segments);
444NILFS_SEGMENTS_RO_ATTR(dirty_segments);
445NILFS_SEGMENTS_RO_ATTR(README);
446
447static struct attribute *nilfs_segments_attrs[] = {
448 NILFS_SEGMENTS_ATTR_LIST(segments_number),
449 NILFS_SEGMENTS_ATTR_LIST(blocks_per_segment),
450 NILFS_SEGMENTS_ATTR_LIST(clean_segments),
451 NILFS_SEGMENTS_ATTR_LIST(dirty_segments),
452 NILFS_SEGMENTS_ATTR_LIST(README),
453 NULL,
454};
455
456NILFS_DEV_INT_GROUP_OPS(segments, dev);
457NILFS_DEV_INT_GROUP_TYPE(segments, dev);
458NILFS_DEV_INT_GROUP_FNS(segments, dev);
459
460
461
462
463
464static ssize_t
465nilfs_segctor_last_pseg_block_show(struct nilfs_segctor_attr *attr,
466 struct the_nilfs *nilfs,
467 char *buf)
468{
469 sector_t last_pseg;
470
471 spin_lock(&nilfs->ns_last_segment_lock);
472 last_pseg = nilfs->ns_last_pseg;
473 spin_unlock(&nilfs->ns_last_segment_lock);
474
475 return snprintf(buf, PAGE_SIZE, "%llu\n",
476 (unsigned long long)last_pseg);
477}
478
479static ssize_t
480nilfs_segctor_last_seg_sequence_show(struct nilfs_segctor_attr *attr,
481 struct the_nilfs *nilfs,
482 char *buf)
483{
484 u64 last_seq;
485
486 spin_lock(&nilfs->ns_last_segment_lock);
487 last_seq = nilfs->ns_last_seq;
488 spin_unlock(&nilfs->ns_last_segment_lock);
489
490 return snprintf(buf, PAGE_SIZE, "%llu\n", last_seq);
491}
492
493static ssize_t
494nilfs_segctor_last_seg_checkpoint_show(struct nilfs_segctor_attr *attr,
495 struct the_nilfs *nilfs,
496 char *buf)
497{
498 __u64 last_cno;
499
500 spin_lock(&nilfs->ns_last_segment_lock);
501 last_cno = nilfs->ns_last_cno;
502 spin_unlock(&nilfs->ns_last_segment_lock);
503
504 return snprintf(buf, PAGE_SIZE, "%llu\n", last_cno);
505}
506
507static ssize_t
508nilfs_segctor_current_seg_sequence_show(struct nilfs_segctor_attr *attr,
509 struct the_nilfs *nilfs,
510 char *buf)
511{
512 u64 seg_seq;
513
514 down_read(&nilfs->ns_sem);
515 seg_seq = nilfs->ns_seg_seq;
516 up_read(&nilfs->ns_sem);
517
518 return snprintf(buf, PAGE_SIZE, "%llu\n", seg_seq);
519}
520
521static ssize_t
522nilfs_segctor_current_last_full_seg_show(struct nilfs_segctor_attr *attr,
523 struct the_nilfs *nilfs,
524 char *buf)
525{
526 __u64 segnum;
527
528 down_read(&nilfs->ns_sem);
529 segnum = nilfs->ns_segnum;
530 up_read(&nilfs->ns_sem);
531
532 return snprintf(buf, PAGE_SIZE, "%llu\n", segnum);
533}
534
535static ssize_t
536nilfs_segctor_next_full_seg_show(struct nilfs_segctor_attr *attr,
537 struct the_nilfs *nilfs,
538 char *buf)
539{
540 __u64 nextnum;
541
542 down_read(&nilfs->ns_sem);
543 nextnum = nilfs->ns_nextnum;
544 up_read(&nilfs->ns_sem);
545
546 return snprintf(buf, PAGE_SIZE, "%llu\n", nextnum);
547}
548
549static ssize_t
550nilfs_segctor_next_pseg_offset_show(struct nilfs_segctor_attr *attr,
551 struct the_nilfs *nilfs,
552 char *buf)
553{
554 unsigned long pseg_offset;
555
556 down_read(&nilfs->ns_sem);
557 pseg_offset = nilfs->ns_pseg_offset;
558 up_read(&nilfs->ns_sem);
559
560 return snprintf(buf, PAGE_SIZE, "%lu\n", pseg_offset);
561}
562
563static ssize_t
564nilfs_segctor_next_checkpoint_show(struct nilfs_segctor_attr *attr,
565 struct the_nilfs *nilfs,
566 char *buf)
567{
568 __u64 cno;
569
570 down_read(&nilfs->ns_sem);
571 cno = nilfs->ns_cno;
572 up_read(&nilfs->ns_sem);
573
574 return snprintf(buf, PAGE_SIZE, "%llu\n", cno);
575}
576
577static ssize_t
578nilfs_segctor_last_seg_write_time_show(struct nilfs_segctor_attr *attr,
579 struct the_nilfs *nilfs,
580 char *buf)
581{
582 time_t ctime;
583
584 down_read(&nilfs->ns_sem);
585 ctime = nilfs->ns_ctime;
586 up_read(&nilfs->ns_sem);
587
588 return NILFS_SHOW_TIME(ctime, buf);
589}
590
591static ssize_t
592nilfs_segctor_last_seg_write_time_secs_show(struct nilfs_segctor_attr *attr,
593 struct the_nilfs *nilfs,
594 char *buf)
595{
596 time_t ctime;
597
598 down_read(&nilfs->ns_sem);
599 ctime = nilfs->ns_ctime;
600 up_read(&nilfs->ns_sem);
601
602 return snprintf(buf, PAGE_SIZE, "%llu\n", (unsigned long long)ctime);
603}
604
605static ssize_t
606nilfs_segctor_last_nongc_write_time_show(struct nilfs_segctor_attr *attr,
607 struct the_nilfs *nilfs,
608 char *buf)
609{
610 time_t nongc_ctime;
611
612 down_read(&nilfs->ns_sem);
613 nongc_ctime = nilfs->ns_nongc_ctime;
614 up_read(&nilfs->ns_sem);
615
616 return NILFS_SHOW_TIME(nongc_ctime, buf);
617}
618
619static ssize_t
620nilfs_segctor_last_nongc_write_time_secs_show(struct nilfs_segctor_attr *attr,
621 struct the_nilfs *nilfs,
622 char *buf)
623{
624 time_t nongc_ctime;
625
626 down_read(&nilfs->ns_sem);
627 nongc_ctime = nilfs->ns_nongc_ctime;
628 up_read(&nilfs->ns_sem);
629
630 return snprintf(buf, PAGE_SIZE, "%llu\n",
631 (unsigned long long)nongc_ctime);
632}
633
634static ssize_t
635nilfs_segctor_dirty_data_blocks_count_show(struct nilfs_segctor_attr *attr,
636 struct the_nilfs *nilfs,
637 char *buf)
638{
639 u32 ndirtyblks;
640
641 down_read(&nilfs->ns_sem);
642 ndirtyblks = atomic_read(&nilfs->ns_ndirtyblks);
643 up_read(&nilfs->ns_sem);
644
645 return snprintf(buf, PAGE_SIZE, "%u\n", ndirtyblks);
646}
647
648static const char segctor_readme_str[] =
649 "The segctor group contains attributes that describe\n"
650 "segctor thread activity details.\n\n"
651 "(1) last_pseg_block\n"
652 "\tshow start block number of the latest segment.\n\n"
653 "(2) last_seg_sequence\n"
654 "\tshow sequence value of the latest segment.\n\n"
655 "(3) last_seg_checkpoint\n"
656 "\tshow checkpoint number of the latest segment.\n\n"
657 "(4) current_seg_sequence\n\tshow segment sequence counter.\n\n"
658 "(5) current_last_full_seg\n"
659 "\tshow index number of the latest full segment.\n\n"
660 "(6) next_full_seg\n"
661 "\tshow index number of the full segment index to be used next.\n\n"
662 "(7) next_pseg_offset\n"
663 "\tshow offset of next partial segment in the current full segment.\n\n"
664 "(8) next_checkpoint\n\tshow next checkpoint number.\n\n"
665 "(9) last_seg_write_time\n"
666 "\tshow write time of the last segment in human-readable format.\n\n"
667 "(10) last_seg_write_time_secs\n"
668 "\tshow write time of the last segment in seconds.\n\n"
669 "(11) last_nongc_write_time\n"
670 "\tshow write time of the last segment not for cleaner operation "
671 "in human-readable format.\n\n"
672 "(12) last_nongc_write_time_secs\n"
673 "\tshow write time of the last segment not for cleaner operation "
674 "in seconds.\n\n"
675 "(13) dirty_data_blocks_count\n"
676 "\tshow number of dirty data blocks.\n\n";
677
678static ssize_t
679nilfs_segctor_README_show(struct nilfs_segctor_attr *attr,
680 struct the_nilfs *nilfs, char *buf)
681{
682 return snprintf(buf, PAGE_SIZE, segctor_readme_str);
683}
684
685NILFS_SEGCTOR_RO_ATTR(last_pseg_block);
686NILFS_SEGCTOR_RO_ATTR(last_seg_sequence);
687NILFS_SEGCTOR_RO_ATTR(last_seg_checkpoint);
688NILFS_SEGCTOR_RO_ATTR(current_seg_sequence);
689NILFS_SEGCTOR_RO_ATTR(current_last_full_seg);
690NILFS_SEGCTOR_RO_ATTR(next_full_seg);
691NILFS_SEGCTOR_RO_ATTR(next_pseg_offset);
692NILFS_SEGCTOR_RO_ATTR(next_checkpoint);
693NILFS_SEGCTOR_RO_ATTR(last_seg_write_time);
694NILFS_SEGCTOR_RO_ATTR(last_seg_write_time_secs);
695NILFS_SEGCTOR_RO_ATTR(last_nongc_write_time);
696NILFS_SEGCTOR_RO_ATTR(last_nongc_write_time_secs);
697NILFS_SEGCTOR_RO_ATTR(dirty_data_blocks_count);
698NILFS_SEGCTOR_RO_ATTR(README);
699
700static struct attribute *nilfs_segctor_attrs[] = {
701 NILFS_SEGCTOR_ATTR_LIST(last_pseg_block),
702 NILFS_SEGCTOR_ATTR_LIST(last_seg_sequence),
703 NILFS_SEGCTOR_ATTR_LIST(last_seg_checkpoint),
704 NILFS_SEGCTOR_ATTR_LIST(current_seg_sequence),
705 NILFS_SEGCTOR_ATTR_LIST(current_last_full_seg),
706 NILFS_SEGCTOR_ATTR_LIST(next_full_seg),
707 NILFS_SEGCTOR_ATTR_LIST(next_pseg_offset),
708 NILFS_SEGCTOR_ATTR_LIST(next_checkpoint),
709 NILFS_SEGCTOR_ATTR_LIST(last_seg_write_time),
710 NILFS_SEGCTOR_ATTR_LIST(last_seg_write_time_secs),
711 NILFS_SEGCTOR_ATTR_LIST(last_nongc_write_time),
712 NILFS_SEGCTOR_ATTR_LIST(last_nongc_write_time_secs),
713 NILFS_SEGCTOR_ATTR_LIST(dirty_data_blocks_count),
714 NILFS_SEGCTOR_ATTR_LIST(README),
715 NULL,
716};
717
718NILFS_DEV_INT_GROUP_OPS(segctor, dev);
719NILFS_DEV_INT_GROUP_TYPE(segctor, dev);
720NILFS_DEV_INT_GROUP_FNS(segctor, dev);
721
722
723
724
725
726static ssize_t
727nilfs_superblock_sb_write_time_show(struct nilfs_superblock_attr *attr,
728 struct the_nilfs *nilfs,
729 char *buf)
730{
731 time_t sbwtime;
732
733 down_read(&nilfs->ns_sem);
734 sbwtime = nilfs->ns_sbwtime;
735 up_read(&nilfs->ns_sem);
736
737 return NILFS_SHOW_TIME(sbwtime, buf);
738}
739
740static ssize_t
741nilfs_superblock_sb_write_time_secs_show(struct nilfs_superblock_attr *attr,
742 struct the_nilfs *nilfs,
743 char *buf)
744{
745 time_t sbwtime;
746
747 down_read(&nilfs->ns_sem);
748 sbwtime = nilfs->ns_sbwtime;
749 up_read(&nilfs->ns_sem);
750
751 return snprintf(buf, PAGE_SIZE, "%llu\n", (unsigned long long)sbwtime);
752}
753
754static ssize_t
755nilfs_superblock_sb_write_count_show(struct nilfs_superblock_attr *attr,
756 struct the_nilfs *nilfs,
757 char *buf)
758{
759 unsigned sbwcount;
760
761 down_read(&nilfs->ns_sem);
762 sbwcount = nilfs->ns_sbwcount;
763 up_read(&nilfs->ns_sem);
764
765 return snprintf(buf, PAGE_SIZE, "%u\n", sbwcount);
766}
767
768static ssize_t
769nilfs_superblock_sb_update_frequency_show(struct nilfs_superblock_attr *attr,
770 struct the_nilfs *nilfs,
771 char *buf)
772{
773 unsigned sb_update_freq;
774
775 down_read(&nilfs->ns_sem);
776 sb_update_freq = nilfs->ns_sb_update_freq;
777 up_read(&nilfs->ns_sem);
778
779 return snprintf(buf, PAGE_SIZE, "%u\n", sb_update_freq);
780}
781
782static ssize_t
783nilfs_superblock_sb_update_frequency_store(struct nilfs_superblock_attr *attr,
784 struct the_nilfs *nilfs,
785 const char *buf, size_t count)
786{
787 unsigned val;
788 int err;
789
790 err = kstrtouint(skip_spaces(buf), 0, &val);
791 if (err) {
792 printk(KERN_ERR "NILFS: unable to convert string: err=%d\n",
793 err);
794 return err;
795 }
796
797 if (val < NILFS_SB_FREQ) {
798 val = NILFS_SB_FREQ;
799 printk(KERN_WARNING "NILFS: superblock update frequency cannot be lesser than 10 seconds\n");
800 }
801
802 down_write(&nilfs->ns_sem);
803 nilfs->ns_sb_update_freq = val;
804 up_write(&nilfs->ns_sem);
805
806 return count;
807}
808
809static const char sb_readme_str[] =
810 "The superblock group contains attributes that describe\n"
811 "superblock's details.\n\n"
812 "(1) sb_write_time\n\tshow previous write time of super block "
813 "in human-readable format.\n\n"
814 "(2) sb_write_time_secs\n\tshow previous write time of super block "
815 "in seconds.\n\n"
816 "(3) sb_write_count\n\tshow write count of super block.\n\n"
817 "(4) sb_update_frequency\n"
818 "\tshow/set interval of periodical update of superblock (in seconds).\n\n"
819 "\tYou can set preferable frequency of superblock update by command:\n\n"
820 "\t'echo <val> > /sys/fs/<nilfs>/<dev>/superblock/sb_update_frequency'\n";
821
822static ssize_t
823nilfs_superblock_README_show(struct nilfs_superblock_attr *attr,
824 struct the_nilfs *nilfs, char *buf)
825{
826 return snprintf(buf, PAGE_SIZE, sb_readme_str);
827}
828
829NILFS_SUPERBLOCK_RO_ATTR(sb_write_time);
830NILFS_SUPERBLOCK_RO_ATTR(sb_write_time_secs);
831NILFS_SUPERBLOCK_RO_ATTR(sb_write_count);
832NILFS_SUPERBLOCK_RW_ATTR(sb_update_frequency);
833NILFS_SUPERBLOCK_RO_ATTR(README);
834
835static struct attribute *nilfs_superblock_attrs[] = {
836 NILFS_SUPERBLOCK_ATTR_LIST(sb_write_time),
837 NILFS_SUPERBLOCK_ATTR_LIST(sb_write_time_secs),
838 NILFS_SUPERBLOCK_ATTR_LIST(sb_write_count),
839 NILFS_SUPERBLOCK_ATTR_LIST(sb_update_frequency),
840 NILFS_SUPERBLOCK_ATTR_LIST(README),
841 NULL,
842};
843
844NILFS_DEV_INT_GROUP_OPS(superblock, dev);
845NILFS_DEV_INT_GROUP_TYPE(superblock, dev);
846NILFS_DEV_INT_GROUP_FNS(superblock, dev);
847
848
849
850
851
852static
853ssize_t nilfs_dev_revision_show(struct nilfs_dev_attr *attr,
854 struct the_nilfs *nilfs,
855 char *buf)
856{
857 struct nilfs_super_block **sbp = nilfs->ns_sbp;
858 u32 major = le32_to_cpu(sbp[0]->s_rev_level);
859 u16 minor = le16_to_cpu(sbp[0]->s_minor_rev_level);
860
861 return snprintf(buf, PAGE_SIZE, "%d.%d\n", major, minor);
862}
863
864static
865ssize_t nilfs_dev_blocksize_show(struct nilfs_dev_attr *attr,
866 struct the_nilfs *nilfs,
867 char *buf)
868{
869 return snprintf(buf, PAGE_SIZE, "%u\n", nilfs->ns_blocksize);
870}
871
872static
873ssize_t nilfs_dev_device_size_show(struct nilfs_dev_attr *attr,
874 struct the_nilfs *nilfs,
875 char *buf)
876{
877 struct nilfs_super_block **sbp = nilfs->ns_sbp;
878 u64 dev_size = le64_to_cpu(sbp[0]->s_dev_size);
879
880 return snprintf(buf, PAGE_SIZE, "%llu\n", dev_size);
881}
882
883static
884ssize_t nilfs_dev_free_blocks_show(struct nilfs_dev_attr *attr,
885 struct the_nilfs *nilfs,
886 char *buf)
887{
888 sector_t free_blocks = 0;
889
890 nilfs_count_free_blocks(nilfs, &free_blocks);
891 return snprintf(buf, PAGE_SIZE, "%llu\n",
892 (unsigned long long)free_blocks);
893}
894
895static
896ssize_t nilfs_dev_uuid_show(struct nilfs_dev_attr *attr,
897 struct the_nilfs *nilfs,
898 char *buf)
899{
900 struct nilfs_super_block **sbp = nilfs->ns_sbp;
901
902 return snprintf(buf, PAGE_SIZE, "%pUb\n", sbp[0]->s_uuid);
903}
904
905static
906ssize_t nilfs_dev_volume_name_show(struct nilfs_dev_attr *attr,
907 struct the_nilfs *nilfs,
908 char *buf)
909{
910 struct nilfs_super_block **sbp = nilfs->ns_sbp;
911
912 return scnprintf(buf, sizeof(sbp[0]->s_volume_name), "%s\n",
913 sbp[0]->s_volume_name);
914}
915
916static const char dev_readme_str[] =
917 "The <device> group contains attributes that describe file system\n"
918 "partition's details.\n\n"
919 "(1) revision\n\tshow NILFS file system revision.\n\n"
920 "(2) blocksize\n\tshow volume block size in bytes.\n\n"
921 "(3) device_size\n\tshow volume size in bytes.\n\n"
922 "(4) free_blocks\n\tshow count of free blocks on volume.\n\n"
923 "(5) uuid\n\tshow volume's UUID.\n\n"
924 "(6) volume_name\n\tshow volume's name.\n\n";
925
926static ssize_t nilfs_dev_README_show(struct nilfs_dev_attr *attr,
927 struct the_nilfs *nilfs,
928 char *buf)
929{
930 return snprintf(buf, PAGE_SIZE, dev_readme_str);
931}
932
933NILFS_DEV_RO_ATTR(revision);
934NILFS_DEV_RO_ATTR(blocksize);
935NILFS_DEV_RO_ATTR(device_size);
936NILFS_DEV_RO_ATTR(free_blocks);
937NILFS_DEV_RO_ATTR(uuid);
938NILFS_DEV_RO_ATTR(volume_name);
939NILFS_DEV_RO_ATTR(README);
940
941static struct attribute *nilfs_dev_attrs[] = {
942 NILFS_DEV_ATTR_LIST(revision),
943 NILFS_DEV_ATTR_LIST(blocksize),
944 NILFS_DEV_ATTR_LIST(device_size),
945 NILFS_DEV_ATTR_LIST(free_blocks),
946 NILFS_DEV_ATTR_LIST(uuid),
947 NILFS_DEV_ATTR_LIST(volume_name),
948 NILFS_DEV_ATTR_LIST(README),
949 NULL,
950};
951
952static ssize_t nilfs_dev_attr_show(struct kobject *kobj,
953 struct attribute *attr, char *buf)
954{
955 struct the_nilfs *nilfs = container_of(kobj, struct the_nilfs,
956 ns_dev_kobj);
957 struct nilfs_dev_attr *a = container_of(attr, struct nilfs_dev_attr,
958 attr);
959
960 return a->show ? a->show(a, nilfs, buf) : 0;
961}
962
963static ssize_t nilfs_dev_attr_store(struct kobject *kobj,
964 struct attribute *attr,
965 const char *buf, size_t len)
966{
967 struct the_nilfs *nilfs = container_of(kobj, struct the_nilfs,
968 ns_dev_kobj);
969 struct nilfs_dev_attr *a = container_of(attr, struct nilfs_dev_attr,
970 attr);
971
972 return a->store ? a->store(a, nilfs, buf, len) : 0;
973}
974
975static void nilfs_dev_attr_release(struct kobject *kobj)
976{
977 struct the_nilfs *nilfs = container_of(kobj, struct the_nilfs,
978 ns_dev_kobj);
979 complete(&nilfs->ns_dev_kobj_unregister);
980}
981
982static const struct sysfs_ops nilfs_dev_attr_ops = {
983 .show = nilfs_dev_attr_show,
984 .store = nilfs_dev_attr_store,
985};
986
987static struct kobj_type nilfs_dev_ktype = {
988 .default_attrs = nilfs_dev_attrs,
989 .sysfs_ops = &nilfs_dev_attr_ops,
990 .release = nilfs_dev_attr_release,
991};
992
993int nilfs_sysfs_create_device_group(struct super_block *sb)
994{
995 struct the_nilfs *nilfs = sb->s_fs_info;
996 size_t devgrp_size = sizeof(struct nilfs_sysfs_dev_subgroups);
997 int err;
998
999 nilfs->ns_dev_subgroups = kzalloc(devgrp_size, GFP_KERNEL);
1000 if (unlikely(!nilfs->ns_dev_subgroups)) {
1001 err = -ENOMEM;
1002 printk(KERN_ERR "NILFS: unable to allocate memory for device group\n");
1003 goto failed_create_device_group;
1004 }
1005
1006 nilfs->ns_dev_kobj.kset = nilfs_kset;
1007 init_completion(&nilfs->ns_dev_kobj_unregister);
1008 err = kobject_init_and_add(&nilfs->ns_dev_kobj, &nilfs_dev_ktype, NULL,
1009 "%s", sb->s_id);
1010 if (err)
1011 goto free_dev_subgroups;
1012
1013 err = nilfs_sysfs_create_mounted_snapshots_group(nilfs);
1014 if (err)
1015 goto cleanup_dev_kobject;
1016
1017 err = nilfs_sysfs_create_checkpoints_group(nilfs);
1018 if (err)
1019 goto delete_mounted_snapshots_group;
1020
1021 err = nilfs_sysfs_create_segments_group(nilfs);
1022 if (err)
1023 goto delete_checkpoints_group;
1024
1025 err = nilfs_sysfs_create_superblock_group(nilfs);
1026 if (err)
1027 goto delete_segments_group;
1028
1029 err = nilfs_sysfs_create_segctor_group(nilfs);
1030 if (err)
1031 goto delete_superblock_group;
1032
1033 return 0;
1034
1035delete_superblock_group:
1036 nilfs_sysfs_delete_superblock_group(nilfs);
1037
1038delete_segments_group:
1039 nilfs_sysfs_delete_segments_group(nilfs);
1040
1041delete_checkpoints_group:
1042 nilfs_sysfs_delete_checkpoints_group(nilfs);
1043
1044delete_mounted_snapshots_group:
1045 nilfs_sysfs_delete_mounted_snapshots_group(nilfs);
1046
1047cleanup_dev_kobject:
1048 kobject_del(&nilfs->ns_dev_kobj);
1049
1050free_dev_subgroups:
1051 kfree(nilfs->ns_dev_subgroups);
1052
1053failed_create_device_group:
1054 return err;
1055}
1056
1057void nilfs_sysfs_delete_device_group(struct the_nilfs *nilfs)
1058{
1059 nilfs_sysfs_delete_mounted_snapshots_group(nilfs);
1060 nilfs_sysfs_delete_checkpoints_group(nilfs);
1061 nilfs_sysfs_delete_segments_group(nilfs);
1062 nilfs_sysfs_delete_superblock_group(nilfs);
1063 nilfs_sysfs_delete_segctor_group(nilfs);
1064 kobject_del(&nilfs->ns_dev_kobj);
1065 kfree(nilfs->ns_dev_subgroups);
1066}
1067
1068
1069
1070
1071
1072static ssize_t nilfs_feature_revision_show(struct kobject *kobj,
1073 struct attribute *attr, char *buf)
1074{
1075 return snprintf(buf, PAGE_SIZE, "%d.%d\n",
1076 NILFS_CURRENT_REV, NILFS_MINOR_REV);
1077}
1078
1079static const char features_readme_str[] =
1080 "The features group contains attributes that describe NILFS file\n"
1081 "system driver features.\n\n"
1082 "(1) revision\n\tshow current revision of NILFS file system driver.\n";
1083
1084static ssize_t nilfs_feature_README_show(struct kobject *kobj,
1085 struct attribute *attr,
1086 char *buf)
1087{
1088 return snprintf(buf, PAGE_SIZE, features_readme_str);
1089}
1090
1091NILFS_FEATURE_RO_ATTR(revision);
1092NILFS_FEATURE_RO_ATTR(README);
1093
1094static struct attribute *nilfs_feature_attrs[] = {
1095 NILFS_FEATURE_ATTR_LIST(revision),
1096 NILFS_FEATURE_ATTR_LIST(README),
1097 NULL,
1098};
1099
1100static const struct attribute_group nilfs_feature_attr_group = {
1101 .name = "features",
1102 .attrs = nilfs_feature_attrs,
1103};
1104
1105int __init nilfs_sysfs_init(void)
1106{
1107 int err;
1108
1109 nilfs_kset = kset_create_and_add(NILFS_ROOT_GROUP_NAME, NULL, fs_kobj);
1110 if (!nilfs_kset) {
1111 err = -ENOMEM;
1112 printk(KERN_ERR "NILFS: unable to create sysfs entry: err %d\n",
1113 err);
1114 goto failed_sysfs_init;
1115 }
1116
1117 err = sysfs_create_group(&nilfs_kset->kobj, &nilfs_feature_attr_group);
1118 if (unlikely(err)) {
1119 printk(KERN_ERR "NILFS: unable to create feature group: err %d\n",
1120 err);
1121 goto cleanup_sysfs_init;
1122 }
1123
1124 return 0;
1125
1126cleanup_sysfs_init:
1127 kset_unregister(nilfs_kset);
1128
1129failed_sysfs_init:
1130 return err;
1131}
1132
1133void nilfs_sysfs_exit(void)
1134{
1135 sysfs_remove_group(&nilfs_kset->kobj, &nilfs_feature_attr_group);
1136 kset_unregister(nilfs_kset);
1137}
1138
