?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Linux 4.16-rc1
[cris-mirror.git] / fs / f2fs / sysfs.c
blobd978c7b6ea04a6c6062ec4c55c1b74adb53274a1
1 /*
2 * f2fs sysfs interface
3 *
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
6 * Copyright (c) 2017 Chao Yu <chao@kernel.org>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12 #include <linux/proc_fs.h>
13 #include <linux/f2fs_fs.h>
14 #include <linux/seq_file.h>
15
16 #include "f2fs.h"
17 #include "segment.h"
18 #include "gc.h"
19
20 static struct proc_dir_entry *f2fs_proc_root;
21
22 /* Sysfs support for f2fs */
23 enum {
24 GC_THREAD, /* struct f2fs_gc_thread */
25 SM_INFO, /* struct f2fs_sm_info */
26 DCC_INFO, /* struct discard_cmd_control */
27 NM_INFO, /* struct f2fs_nm_info */
28 F2FS_SBI, /* struct f2fs_sb_info */
29 #ifdef CONFIG_F2FS_FAULT_INJECTION
30 FAULT_INFO_RATE, /* struct f2fs_fault_info */
31 FAULT_INFO_TYPE, /* struct f2fs_fault_info */
32 #endif
33 RESERVED_BLOCKS, /* struct f2fs_sb_info */
34 };
35
36 struct f2fs_attr {
37 struct attribute attr;
38 ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
39 ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
40 const char *, size_t);
41 int struct_type;
42 int offset;
43 int id;
44 };
45
46 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
47 {
48 if (struct_type == GC_THREAD)
49 return (unsigned char *)sbi->gc_thread;
50 else if (struct_type == SM_INFO)
51 return (unsigned char *)SM_I(sbi);
52 else if (struct_type == DCC_INFO)
53 return (unsigned char *)SM_I(sbi)->dcc_info;
54 else if (struct_type == NM_INFO)
55 return (unsigned char *)NM_I(sbi);
56 else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
57 return (unsigned char *)sbi;
58 #ifdef CONFIG_F2FS_FAULT_INJECTION
59 else if (struct_type == FAULT_INFO_RATE ||
60 struct_type == FAULT_INFO_TYPE)
61 return (unsigned char *)&sbi->fault_info;
62 #endif
63 return NULL;
64 }
65
66 static ssize_t dirty_segments_show(struct f2fs_attr *a,
67 struct f2fs_sb_info *sbi, char *buf)
68 {
69 return snprintf(buf, PAGE_SIZE, "%llu\n",
70 (unsigned long long)(dirty_segments(sbi)));
71 }
72
73 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
74 struct f2fs_sb_info *sbi, char *buf)
75 {
76 struct super_block *sb = sbi->sb;
77
78 if (!sb->s_bdev->bd_part)
79 return snprintf(buf, PAGE_SIZE, "0\n");
80
81 return snprintf(buf, PAGE_SIZE, "%llu\n",
82 (unsigned long long)(sbi->kbytes_written +
83 BD_PART_WRITTEN(sbi)));
84 }
85
86 static ssize_t features_show(struct f2fs_attr *a,
87 struct f2fs_sb_info *sbi, char *buf)
88 {
89 struct super_block *sb = sbi->sb;
90 int len = 0;
91
92 if (!sb->s_bdev->bd_part)
93 return snprintf(buf, PAGE_SIZE, "0\n");
94
95 if (f2fs_sb_has_crypto(sb))
96 len += snprintf(buf, PAGE_SIZE - len, "%s",
97 "encryption");
98 if (f2fs_sb_mounted_blkzoned(sb))
99 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
100 len ? ", " : "", "blkzoned");
101 if (f2fs_sb_has_extra_attr(sb))
102 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
103 len ? ", " : "", "extra_attr");
104 if (f2fs_sb_has_project_quota(sb))
105 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
106 len ? ", " : "", "projquota");
107 if (f2fs_sb_has_inode_chksum(sb))
108 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
109 len ? ", " : "", "inode_checksum");
110 if (f2fs_sb_has_flexible_inline_xattr(sb))
111 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
112 len ? ", " : "", "flexible_inline_xattr");
113 if (f2fs_sb_has_quota_ino(sb))
114 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
115 len ? ", " : "", "quota_ino");
116 if (f2fs_sb_has_inode_crtime(sb))
117 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
118 len ? ", " : "", "inode_crtime");
119 len += snprintf(buf + len, PAGE_SIZE - len, "\n");
120 return len;
121 }
122
123 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
124 struct f2fs_sb_info *sbi, char *buf)
125 {
126 return snprintf(buf, PAGE_SIZE, "%u\n", sbi->current_reserved_blocks);
127 }
128
129 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
130 struct f2fs_sb_info *sbi, char *buf)
131 {
132 unsigned char *ptr = NULL;
133 unsigned int *ui;
134
135 ptr = __struct_ptr(sbi, a->struct_type);
136 if (!ptr)
137 return -EINVAL;
138
139 ui = (unsigned int *)(ptr + a->offset);
140
141 return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
142 }
143
144 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
145 struct f2fs_sb_info *sbi,
146 const char *buf, size_t count)
147 {
148 unsigned char *ptr;
149 unsigned long t;
150 unsigned int *ui;
151 ssize_t ret;
152
153 ptr = __struct_ptr(sbi, a->struct_type);
154 if (!ptr)
155 return -EINVAL;
156
157 ui = (unsigned int *)(ptr + a->offset);
158
159 ret = kstrtoul(skip_spaces(buf), 0, &t);
160 if (ret < 0)
161 return ret;
162 #ifdef CONFIG_F2FS_FAULT_INJECTION
163 if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
164 return -EINVAL;
165 #endif
166 if (a->struct_type == RESERVED_BLOCKS) {
167 spin_lock(&sbi->stat_lock);
168 if (t > (unsigned long)(sbi->user_block_count -
169 sbi->root_reserved_blocks)) {
170 spin_unlock(&sbi->stat_lock);
171 return -EINVAL;
172 }
173 *ui = t;
174 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
175 sbi->user_block_count - valid_user_blocks(sbi));
176 spin_unlock(&sbi->stat_lock);
177 return count;
178 }
179
180 if (!strcmp(a->attr.name, "discard_granularity")) {
181 if (t == 0 || t > MAX_PLIST_NUM)
182 return -EINVAL;
183 if (t == *ui)
184 return count;
185 *ui = t;
186 return count;
187 }
188
189 *ui = t;
190
191 if (!strcmp(a->attr.name, "iostat_enable") && *ui == 0)
192 f2fs_reset_iostat(sbi);
193 if (!strcmp(a->attr.name, "gc_urgent") && t == 1 && sbi->gc_thread) {
194 sbi->gc_thread->gc_wake = 1;
195 wake_up_interruptible_all(&sbi->gc_thread->gc_wait_queue_head);
196 wake_up_discard_thread(sbi, true);
197 }
198
199 return count;
200 }
201
202 static ssize_t f2fs_attr_show(struct kobject *kobj,
203 struct attribute *attr, char *buf)
204 {
205 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
206 s_kobj);
207 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
208
209 return a->show ? a->show(a, sbi, buf) : 0;
210 }
211
212 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
213 const char *buf, size_t len)
214 {
215 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
216 s_kobj);
217 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
218
219 return a->store ? a->store(a, sbi, buf, len) : 0;
220 }
221
222 static void f2fs_sb_release(struct kobject *kobj)
223 {
224 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
225 s_kobj);
226 complete(&sbi->s_kobj_unregister);
227 }
228
229 enum feat_id {
230 FEAT_CRYPTO = 0,
231 FEAT_BLKZONED,
232 FEAT_ATOMIC_WRITE,
233 FEAT_EXTRA_ATTR,
234 FEAT_PROJECT_QUOTA,
235 FEAT_INODE_CHECKSUM,
236 FEAT_FLEXIBLE_INLINE_XATTR,
237 FEAT_QUOTA_INO,
238 FEAT_INODE_CRTIME,
239 };
240
241 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
242 struct f2fs_sb_info *sbi, char *buf)
243 {
244 switch (a->id) {
245 case FEAT_CRYPTO:
246 case FEAT_BLKZONED:
247 case FEAT_ATOMIC_WRITE:
248 case FEAT_EXTRA_ATTR:
249 case FEAT_PROJECT_QUOTA:
250 case FEAT_INODE_CHECKSUM:
251 case FEAT_FLEXIBLE_INLINE_XATTR:
252 case FEAT_QUOTA_INO:
253 case FEAT_INODE_CRTIME:
254 return snprintf(buf, PAGE_SIZE, "supported\n");
255 }
256 return 0;
257 }
258
259 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
260 static struct f2fs_attr f2fs_attr_##_name = { \
261 .attr = {.name = __stringify(_name), .mode = _mode }, \
262 .show = _show, \
263 .store = _store, \
264 .struct_type = _struct_type, \
265 .offset = _offset \
266 }
267
268 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \
269 F2FS_ATTR_OFFSET(struct_type, name, 0644, \
270 f2fs_sbi_show, f2fs_sbi_store, \
271 offsetof(struct struct_name, elname))
272
273 #define F2FS_GENERAL_RO_ATTR(name) \
274 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
275
276 #define F2FS_FEATURE_RO_ATTR(_name, _id) \
277 static struct f2fs_attr f2fs_attr_##_name = { \
278 .attr = {.name = __stringify(_name), .mode = 0444 }, \
279 .show = f2fs_feature_show, \
280 .id = _id, \
281 }
282
283 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
284 urgent_sleep_time);
285 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
286 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
287 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
288 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle);
289 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent, gc_urgent);
290 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
291 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
292 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
293 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
294 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
295 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
296 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
297 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
298 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
299 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
300 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
301 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
302 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
303 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
304 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
305 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
306 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
307 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
308 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
309 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
310 #ifdef CONFIG_F2FS_FAULT_INJECTION
311 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
312 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
313 #endif
314 F2FS_GENERAL_RO_ATTR(dirty_segments);
315 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
316 F2FS_GENERAL_RO_ATTR(features);
317 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
318
319 #ifdef CONFIG_F2FS_FS_ENCRYPTION
320 F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
321 #endif
322 #ifdef CONFIG_BLK_DEV_ZONED
323 F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED);
324 #endif
325 F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE);
326 F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR);
327 F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA);
328 F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM);
329 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR);
330 F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO);
331 F2FS_FEATURE_RO_ATTR(inode_crtime, FEAT_INODE_CRTIME);
332
333 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
334 static struct attribute *f2fs_attrs[] = {
335 ATTR_LIST(gc_urgent_sleep_time),
336 ATTR_LIST(gc_min_sleep_time),
337 ATTR_LIST(gc_max_sleep_time),
338 ATTR_LIST(gc_no_gc_sleep_time),
339 ATTR_LIST(gc_idle),
340 ATTR_LIST(gc_urgent),
341 ATTR_LIST(reclaim_segments),
342 ATTR_LIST(max_small_discards),
343 ATTR_LIST(discard_granularity),
344 ATTR_LIST(batched_trim_sections),
345 ATTR_LIST(ipu_policy),
346 ATTR_LIST(min_ipu_util),
347 ATTR_LIST(min_fsync_blocks),
348 ATTR_LIST(min_hot_blocks),
349 ATTR_LIST(min_ssr_sections),
350 ATTR_LIST(max_victim_search),
351 ATTR_LIST(dir_level),
352 ATTR_LIST(ram_thresh),
353 ATTR_LIST(ra_nid_pages),
354 ATTR_LIST(dirty_nats_ratio),
355 ATTR_LIST(cp_interval),
356 ATTR_LIST(idle_interval),
357 ATTR_LIST(iostat_enable),
358 ATTR_LIST(readdir_ra),
359 ATTR_LIST(gc_pin_file_thresh),
360 #ifdef CONFIG_F2FS_FAULT_INJECTION
361 ATTR_LIST(inject_rate),
362 ATTR_LIST(inject_type),
363 #endif
364 ATTR_LIST(dirty_segments),
365 ATTR_LIST(lifetime_write_kbytes),
366 ATTR_LIST(features),
367 ATTR_LIST(reserved_blocks),
368 ATTR_LIST(current_reserved_blocks),
369 NULL,
370 };
371
372 static struct attribute *f2fs_feat_attrs[] = {
373 #ifdef CONFIG_F2FS_FS_ENCRYPTION
374 ATTR_LIST(encryption),
375 #endif
376 #ifdef CONFIG_BLK_DEV_ZONED
377 ATTR_LIST(block_zoned),
378 #endif
379 ATTR_LIST(atomic_write),
380 ATTR_LIST(extra_attr),
381 ATTR_LIST(project_quota),
382 ATTR_LIST(inode_checksum),
383 ATTR_LIST(flexible_inline_xattr),
384 ATTR_LIST(quota_ino),
385 ATTR_LIST(inode_crtime),
386 NULL,
387 };
388
389 static const struct sysfs_ops f2fs_attr_ops = {
390 .show = f2fs_attr_show,
391 .store = f2fs_attr_store,
392 };
393
394 static struct kobj_type f2fs_sb_ktype = {
395 .default_attrs = f2fs_attrs,
396 .sysfs_ops = &f2fs_attr_ops,
397 .release = f2fs_sb_release,
398 };
399
400 static struct kobj_type f2fs_ktype = {
401 .sysfs_ops = &f2fs_attr_ops,
402 };
403
404 static struct kset f2fs_kset = {
405 .kobj = {.ktype = &f2fs_ktype},
406 };
407
408 static struct kobj_type f2fs_feat_ktype = {
409 .default_attrs = f2fs_feat_attrs,
410 .sysfs_ops = &f2fs_attr_ops,
411 };
412
413 static struct kobject f2fs_feat = {
414 .kset = &f2fs_kset,
415 };
416
417 static int segment_info_seq_show(struct seq_file *seq, void *offset)
418 {
419 struct super_block *sb = seq->private;
420 struct f2fs_sb_info *sbi = F2FS_SB(sb);
421 unsigned int total_segs =
422 le32_to_cpu(sbi->raw_super->segment_count_main);
423 int i;
424
425 seq_puts(seq, "format: segment_type|valid_blocks\n"
426 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
427
428 for (i = 0; i < total_segs; i++) {
429 struct seg_entry *se = get_seg_entry(sbi, i);
430
431 if ((i % 10) == 0)
432 seq_printf(seq, "%-10d", i);
433 seq_printf(seq, "%d|%-3u", se->type,
434 get_valid_blocks(sbi, i, false));
435 if ((i % 10) == 9 || i == (total_segs - 1))
436 seq_putc(seq, '\n');
437 else
438 seq_putc(seq, ' ');
439 }
440
441 return 0;
442 }
443
444 static int segment_bits_seq_show(struct seq_file *seq, void *offset)
445 {
446 struct super_block *sb = seq->private;
447 struct f2fs_sb_info *sbi = F2FS_SB(sb);
448 unsigned int total_segs =
449 le32_to_cpu(sbi->raw_super->segment_count_main);
450 int i, j;
451
452 seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
453 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
454
455 for (i = 0; i < total_segs; i++) {
456 struct seg_entry *se = get_seg_entry(sbi, i);
457
458 seq_printf(seq, "%-10d", i);
459 seq_printf(seq, "%d|%-3u|", se->type,
460 get_valid_blocks(sbi, i, false));
461 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
462 seq_printf(seq, " %.2x", se->cur_valid_map[j]);
463 seq_putc(seq, '\n');
464 }
465 return 0;
466 }
467
468 static int iostat_info_seq_show(struct seq_file *seq, void *offset)
469 {
470 struct super_block *sb = seq->private;
471 struct f2fs_sb_info *sbi = F2FS_SB(sb);
472 time64_t now = ktime_get_real_seconds();
473
474 if (!sbi->iostat_enable)
475 return 0;
476
477 seq_printf(seq, "time: %-16llu\n", now);
478
479 /* print app IOs */
480 seq_printf(seq, "app buffered: %-16llu\n",
481 sbi->write_iostat[APP_BUFFERED_IO]);
482 seq_printf(seq, "app direct: %-16llu\n",
483 sbi->write_iostat[APP_DIRECT_IO]);
484 seq_printf(seq, "app mapped: %-16llu\n",
485 sbi->write_iostat[APP_MAPPED_IO]);
486
487 /* print fs IOs */
488 seq_printf(seq, "fs data: %-16llu\n",
489 sbi->write_iostat[FS_DATA_IO]);
490 seq_printf(seq, "fs node: %-16llu\n",
491 sbi->write_iostat[FS_NODE_IO]);
492 seq_printf(seq, "fs meta: %-16llu\n",
493 sbi->write_iostat[FS_META_IO]);
494 seq_printf(seq, "fs gc data: %-16llu\n",
495 sbi->write_iostat[FS_GC_DATA_IO]);
496 seq_printf(seq, "fs gc node: %-16llu\n",
497 sbi->write_iostat[FS_GC_NODE_IO]);
498 seq_printf(seq, "fs cp data: %-16llu\n",
499 sbi->write_iostat[FS_CP_DATA_IO]);
500 seq_printf(seq, "fs cp node: %-16llu\n",
501 sbi->write_iostat[FS_CP_NODE_IO]);
502 seq_printf(seq, "fs cp meta: %-16llu\n",
503 sbi->write_iostat[FS_CP_META_IO]);
504 seq_printf(seq, "fs discard: %-16llu\n",
505 sbi->write_iostat[FS_DISCARD]);
506
507 return 0;
508 }
509
510 #define F2FS_PROC_FILE_DEF(_name) \
511 static int _name##_open_fs(struct inode *inode, struct file *file) \
512 { \
513 return single_open(file, _name##_seq_show, PDE_DATA(inode)); \
514 } \
515 \
516 static const struct file_operations f2fs_seq_##_name##_fops = { \
517 .open = _name##_open_fs, \
518 .read = seq_read, \
519 .llseek = seq_lseek, \
520 .release = single_release, \
521 };
522
523 F2FS_PROC_FILE_DEF(segment_info);
524 F2FS_PROC_FILE_DEF(segment_bits);
525 F2FS_PROC_FILE_DEF(iostat_info);
526
527 int __init f2fs_init_sysfs(void)
528 {
529 int ret;
530
531 kobject_set_name(&f2fs_kset.kobj, "f2fs");
532 f2fs_kset.kobj.parent = fs_kobj;
533 ret = kset_register(&f2fs_kset);
534 if (ret)
535 return ret;
536
537 ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
538 NULL, "features");
539 if (ret)
540 kset_unregister(&f2fs_kset);
541 else
542 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
543 return ret;
544 }
545
546 void f2fs_exit_sysfs(void)
547 {
548 kobject_put(&f2fs_feat);
549 kset_unregister(&f2fs_kset);
550 remove_proc_entry("fs/f2fs", NULL);
551 f2fs_proc_root = NULL;
552 }
553
554 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
555 {
556 struct super_block *sb = sbi->sb;
557 int err;
558
559 sbi->s_kobj.kset = &f2fs_kset;
560 init_completion(&sbi->s_kobj_unregister);
561 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
562 "%s", sb->s_id);
563 if (err)
564 return err;
565
566 if (f2fs_proc_root)
567 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
568
569 if (sbi->s_proc) {
570 proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
571 &f2fs_seq_segment_info_fops, sb);
572 proc_create_data("segment_bits", S_IRUGO, sbi->s_proc,
573 &f2fs_seq_segment_bits_fops, sb);
574 proc_create_data("iostat_info", S_IRUGO, sbi->s_proc,
575 &f2fs_seq_iostat_info_fops, sb);
576 }
577 return 0;
578 }
579
580 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
581 {
582 if (sbi->s_proc) {
583 remove_proc_entry("iostat_info", sbi->s_proc);
584 remove_proc_entry("segment_info", sbi->s_proc);
585 remove_proc_entry("segment_bits", sbi->s_proc);
586 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
587 }
588 kobject_del(&sbi->s_kobj);
589 }
CRIS linux kernel tree