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
__struct_ptr(struct f2fs_sb_info * sbi,int struct_type)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 *)&F2FS_OPTION(sbi).fault_info;
62 #endif
63 return NULL;
64 }
65
dirty_segments_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)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
lifetime_write_kbytes_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)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
features_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)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_encrypt(sb))
96 len += snprintf(buf, PAGE_SIZE - len, "%s",
97 "encryption");
98 if (f2fs_sb_has_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 if (f2fs_sb_has_lost_found(sb))
120 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
121 len ? ", " : "", "lost_found");
122 len += snprintf(buf + len, PAGE_SIZE - len, "\n");
123 return len;
124 }
125
current_reserved_blocks_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)126 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
127 struct f2fs_sb_info *sbi, char *buf)
128 {
129 return snprintf(buf, PAGE_SIZE, "%u\n", sbi->current_reserved_blocks);
130 }
131
f2fs_sbi_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)132 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
133 struct f2fs_sb_info *sbi, char *buf)
134 {
135 unsigned char *ptr = NULL;
136 unsigned int *ui;
137
138 ptr = __struct_ptr(sbi, a->struct_type);
139 if (!ptr)
140 return -EINVAL;
141
142 if (!strcmp(a->attr.name, "extension_list")) {
143 __u8 (*extlist)[F2FS_EXTENSION_LEN] =
144 sbi->raw_super->extension_list;
145 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
146 int hot_count = sbi->raw_super->hot_ext_count;
147 int len = 0, i;
148
149 len += snprintf(buf + len, PAGE_SIZE - len,
150 "cold file extenstion:\n");
151 for (i = 0; i < cold_count; i++)
152 len += snprintf(buf + len, PAGE_SIZE - len, "%s\n",
153 extlist[i]);
154
155 len += snprintf(buf + len, PAGE_SIZE - len,
156 "hot file extenstion:\n");
157 for (i = cold_count; i < cold_count + hot_count; i++)
158 len += snprintf(buf + len, PAGE_SIZE - len, "%s\n",
159 extlist[i]);
160 return len;
161 }
162
163 ui = (unsigned int *)(ptr + a->offset);
164
165 return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
166 }
167
f2fs_sbi_store(struct f2fs_attr * a,struct f2fs_sb_info * sbi,const char * buf,size_t count)168 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
169 struct f2fs_sb_info *sbi,
170 const char *buf, size_t count)
171 {
172 unsigned char *ptr;
173 unsigned long t;
174 unsigned int *ui;
175 ssize_t ret;
176
177 ptr = __struct_ptr(sbi, a->struct_type);
178 if (!ptr)
179 return -EINVAL;
180
181 if (!strcmp(a->attr.name, "extension_list")) {
182 const char *name = strim((char *)buf);
183 bool set = true, hot;
184
185 if (!strncmp(name, "[h]", 3))
186 hot = true;
187 else if (!strncmp(name, "[c]", 3))
188 hot = false;
189 else
190 return -EINVAL;
191
192 name += 3;
193
194 if (*name == '!') {
195 name++;
196 set = false;
197 }
198
199 if (strlen(name) >= F2FS_EXTENSION_LEN)
200 return -EINVAL;
201
202 down_write(&sbi->sb_lock);
203
204 ret = update_extension_list(sbi, name, hot, set);
205 if (ret)
206 goto out;
207
208 ret = f2fs_commit_super(sbi, false);
209 if (ret)
210 update_extension_list(sbi, name, hot, !set);
211 out:
212 up_write(&sbi->sb_lock);
213 return ret ? ret : count;
214 }
215
216 ui = (unsigned int *)(ptr + a->offset);
217
218 ret = kstrtoul(skip_spaces(buf), 0, &t);
219 if (ret < 0)
220 return ret;
221 #ifdef CONFIG_F2FS_FAULT_INJECTION
222 if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
223 return -EINVAL;
224 #endif
225 if (a->struct_type == RESERVED_BLOCKS) {
226 spin_lock(&sbi->stat_lock);
227 if (t > (unsigned long)(sbi->user_block_count -
228 F2FS_OPTION(sbi).root_reserved_blocks)) {
229 spin_unlock(&sbi->stat_lock);
230 return -EINVAL;
231 }
232 *ui = t;
233 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
234 sbi->user_block_count - valid_user_blocks(sbi));
235 spin_unlock(&sbi->stat_lock);
236 return count;
237 }
238
239 if (!strcmp(a->attr.name, "discard_granularity")) {
240 if (t == 0 || t > MAX_PLIST_NUM)
241 return -EINVAL;
242 if (t == *ui)
243 return count;
244 *ui = t;
245 return count;
246 }
247
248 if (!strcmp(a->attr.name, "trim_sections"))
249 return -EINVAL;
250
251 *ui = t;
252
253 if (!strcmp(a->attr.name, "iostat_enable") && *ui == 0)
254 f2fs_reset_iostat(sbi);
255 if (!strcmp(a->attr.name, "gc_urgent") && t == 1 && sbi->gc_thread) {
256 sbi->gc_thread->gc_wake = 1;
257 wake_up_interruptible_all(&sbi->gc_thread->gc_wait_queue_head);
258 wake_up_discard_thread(sbi, true);
259 }
260
261 return count;
262 }
263
f2fs_attr_show(struct kobject * kobj,struct attribute * attr,char * buf)264 static ssize_t f2fs_attr_show(struct kobject *kobj,
265 struct attribute *attr, char *buf)
266 {
267 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
268 s_kobj);
269 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
270
271 return a->show ? a->show(a, sbi, buf) : 0;
272 }
273
f2fs_attr_store(struct kobject * kobj,struct attribute * attr,const char * buf,size_t len)274 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
275 const char *buf, size_t len)
276 {
277 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
278 s_kobj);
279 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
280
281 return a->store ? a->store(a, sbi, buf, len) : 0;
282 }
283
f2fs_sb_release(struct kobject * kobj)284 static void f2fs_sb_release(struct kobject *kobj)
285 {
286 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
287 s_kobj);
288 complete(&sbi->s_kobj_unregister);
289 }
290
291 enum feat_id {
292 FEAT_CRYPTO = 0,
293 FEAT_BLKZONED,
294 FEAT_ATOMIC_WRITE,
295 FEAT_EXTRA_ATTR,
296 FEAT_PROJECT_QUOTA,
297 FEAT_INODE_CHECKSUM,
298 FEAT_FLEXIBLE_INLINE_XATTR,
299 FEAT_QUOTA_INO,
300 FEAT_INODE_CRTIME,
301 FEAT_LOST_FOUND,
302 };
303
f2fs_feature_show(struct f2fs_attr * a,struct f2fs_sb_info * sbi,char * buf)304 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
305 struct f2fs_sb_info *sbi, char *buf)
306 {
307 switch (a->id) {
308 case FEAT_CRYPTO:
309 case FEAT_BLKZONED:
310 case FEAT_ATOMIC_WRITE:
311 case FEAT_EXTRA_ATTR:
312 case FEAT_PROJECT_QUOTA:
313 case FEAT_INODE_CHECKSUM:
314 case FEAT_FLEXIBLE_INLINE_XATTR:
315 case FEAT_QUOTA_INO:
316 case FEAT_INODE_CRTIME:
317 case FEAT_LOST_FOUND:
318 return snprintf(buf, PAGE_SIZE, "supported\n");
319 }
320 return 0;
321 }
322
323 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
324 static struct f2fs_attr f2fs_attr_##_name = { \
325 .attr = {.name = __stringify(_name), .mode = _mode }, \
326 .show = _show, \
327 .store = _store, \
328 .struct_type = _struct_type, \
329 .offset = _offset \
330 }
331
332 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \
333 F2FS_ATTR_OFFSET(struct_type, name, 0644, \
334 f2fs_sbi_show, f2fs_sbi_store, \
335 offsetof(struct struct_name, elname))
336
337 #define F2FS_GENERAL_RO_ATTR(name) \
338 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
339
340 #define F2FS_FEATURE_RO_ATTR(_name, _id) \
341 static struct f2fs_attr f2fs_attr_##_name = { \
342 .attr = {.name = __stringify(_name), .mode = 0444 }, \
343 .show = f2fs_feature_show, \
344 .id = _id, \
345 }
346
347 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
348 urgent_sleep_time);
349 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
350 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
351 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
352 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle);
353 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent, gc_urgent);
354 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
355 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
356 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
357 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
358 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
359 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
360 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
361 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
362 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
363 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
364 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
365 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
366 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
367 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
368 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
369 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
370 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
371 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
372 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
373 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
374 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
375 #ifdef CONFIG_F2FS_FAULT_INJECTION
376 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
377 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
378 #endif
379 F2FS_GENERAL_RO_ATTR(dirty_segments);
380 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
381 F2FS_GENERAL_RO_ATTR(features);
382 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
383
384 #ifdef CONFIG_F2FS_FS_ENCRYPTION
385 F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
386 #endif
387 #ifdef CONFIG_BLK_DEV_ZONED
388 F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED);
389 #endif
390 F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE);
391 F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR);
392 F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA);
393 F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM);
394 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR);
395 F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO);
396 F2FS_FEATURE_RO_ATTR(inode_crtime, FEAT_INODE_CRTIME);
397 F2FS_FEATURE_RO_ATTR(lost_found, FEAT_LOST_FOUND);
398
399 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
400 static struct attribute *f2fs_attrs[] = {
401 ATTR_LIST(gc_urgent_sleep_time),
402 ATTR_LIST(gc_min_sleep_time),
403 ATTR_LIST(gc_max_sleep_time),
404 ATTR_LIST(gc_no_gc_sleep_time),
405 ATTR_LIST(gc_idle),
406 ATTR_LIST(gc_urgent),
407 ATTR_LIST(reclaim_segments),
408 ATTR_LIST(max_small_discards),
409 ATTR_LIST(discard_granularity),
410 ATTR_LIST(batched_trim_sections),
411 ATTR_LIST(ipu_policy),
412 ATTR_LIST(min_ipu_util),
413 ATTR_LIST(min_fsync_blocks),
414 ATTR_LIST(min_hot_blocks),
415 ATTR_LIST(min_ssr_sections),
416 ATTR_LIST(max_victim_search),
417 ATTR_LIST(dir_level),
418 ATTR_LIST(ram_thresh),
419 ATTR_LIST(ra_nid_pages),
420 ATTR_LIST(dirty_nats_ratio),
421 ATTR_LIST(cp_interval),
422 ATTR_LIST(idle_interval),
423 ATTR_LIST(iostat_enable),
424 ATTR_LIST(readdir_ra),
425 ATTR_LIST(gc_pin_file_thresh),
426 ATTR_LIST(extension_list),
427 #ifdef CONFIG_F2FS_FAULT_INJECTION
428 ATTR_LIST(inject_rate),
429 ATTR_LIST(inject_type),
430 #endif
431 ATTR_LIST(dirty_segments),
432 ATTR_LIST(lifetime_write_kbytes),
433 ATTR_LIST(features),
434 ATTR_LIST(reserved_blocks),
435 ATTR_LIST(current_reserved_blocks),
436 NULL,
437 };
438
439 static struct attribute *f2fs_feat_attrs[] = {
440 #ifdef CONFIG_F2FS_FS_ENCRYPTION
441 ATTR_LIST(encryption),
442 #endif
443 #ifdef CONFIG_BLK_DEV_ZONED
444 ATTR_LIST(block_zoned),
445 #endif
446 ATTR_LIST(atomic_write),
447 ATTR_LIST(extra_attr),
448 ATTR_LIST(project_quota),
449 ATTR_LIST(inode_checksum),
450 ATTR_LIST(flexible_inline_xattr),
451 ATTR_LIST(quota_ino),
452 ATTR_LIST(inode_crtime),
453 ATTR_LIST(lost_found),
454 NULL,
455 };
456
457 static const struct sysfs_ops f2fs_attr_ops = {
458 .show = f2fs_attr_show,
459 .store = f2fs_attr_store,
460 };
461
462 static struct kobj_type f2fs_sb_ktype = {
463 .default_attrs = f2fs_attrs,
464 .sysfs_ops = &f2fs_attr_ops,
465 .release = f2fs_sb_release,
466 };
467
468 static struct kobj_type f2fs_ktype = {
469 .sysfs_ops = &f2fs_attr_ops,
470 };
471
472 static struct kset f2fs_kset = {
473 .kobj = {.ktype = &f2fs_ktype},
474 };
475
476 static struct kobj_type f2fs_feat_ktype = {
477 .default_attrs = f2fs_feat_attrs,
478 .sysfs_ops = &f2fs_attr_ops,
479 };
480
481 static struct kobject f2fs_feat = {
482 .kset = &f2fs_kset,
483 };
484
segment_info_seq_show(struct seq_file * seq,void * offset)485 static int segment_info_seq_show(struct seq_file *seq, void *offset)
486 {
487 struct super_block *sb = seq->private;
488 struct f2fs_sb_info *sbi = F2FS_SB(sb);
489 unsigned int total_segs =
490 le32_to_cpu(sbi->raw_super->segment_count_main);
491 int i;
492
493 seq_puts(seq, "format: segment_type|valid_blocks\n"
494 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
495
496 for (i = 0; i < total_segs; i++) {
497 struct seg_entry *se = get_seg_entry(sbi, i);
498
499 if ((i % 10) == 0)
500 seq_printf(seq, "%-10d", i);
501 seq_printf(seq, "%d|%-3u", se->type,
502 get_valid_blocks(sbi, i, false));
503 if ((i % 10) == 9 || i == (total_segs - 1))
504 seq_putc(seq, '\n');
505 else
506 seq_putc(seq, ' ');
507 }
508
509 return 0;
510 }
511
segment_bits_seq_show(struct seq_file * seq,void * offset)512 static int segment_bits_seq_show(struct seq_file *seq, void *offset)
513 {
514 struct super_block *sb = seq->private;
515 struct f2fs_sb_info *sbi = F2FS_SB(sb);
516 unsigned int total_segs =
517 le32_to_cpu(sbi->raw_super->segment_count_main);
518 int i, j;
519
520 seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
521 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
522
523 for (i = 0; i < total_segs; i++) {
524 struct seg_entry *se = get_seg_entry(sbi, i);
525
526 seq_printf(seq, "%-10d", i);
527 seq_printf(seq, "%d|%-3u|", se->type,
528 get_valid_blocks(sbi, i, false));
529 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
530 seq_printf(seq, " %.2x", se->cur_valid_map[j]);
531 seq_putc(seq, '\n');
532 }
533 return 0;
534 }
535
iostat_info_seq_show(struct seq_file * seq,void * offset)536 static int iostat_info_seq_show(struct seq_file *seq, void *offset)
537 {
538 struct super_block *sb = seq->private;
539 struct f2fs_sb_info *sbi = F2FS_SB(sb);
540 time64_t now = ktime_get_real_seconds();
541
542 if (!sbi->iostat_enable)
543 return 0;
544
545 seq_printf(seq, "time: %-16llu\n", now);
546
547 /* print app IOs */
548 seq_printf(seq, "app buffered: %-16llu\n",
549 sbi->write_iostat[APP_BUFFERED_IO]);
550 seq_printf(seq, "app direct: %-16llu\n",
551 sbi->write_iostat[APP_DIRECT_IO]);
552 seq_printf(seq, "app mapped: %-16llu\n",
553 sbi->write_iostat[APP_MAPPED_IO]);
554
555 /* print fs IOs */
556 seq_printf(seq, "fs data: %-16llu\n",
557 sbi->write_iostat[FS_DATA_IO]);
558 seq_printf(seq, "fs node: %-16llu\n",
559 sbi->write_iostat[FS_NODE_IO]);
560 seq_printf(seq, "fs meta: %-16llu\n",
561 sbi->write_iostat[FS_META_IO]);
562 seq_printf(seq, "fs gc data: %-16llu\n",
563 sbi->write_iostat[FS_GC_DATA_IO]);
564 seq_printf(seq, "fs gc node: %-16llu\n",
565 sbi->write_iostat[FS_GC_NODE_IO]);
566 seq_printf(seq, "fs cp data: %-16llu\n",
567 sbi->write_iostat[FS_CP_DATA_IO]);
568 seq_printf(seq, "fs cp node: %-16llu\n",
569 sbi->write_iostat[FS_CP_NODE_IO]);
570 seq_printf(seq, "fs cp meta: %-16llu\n",
571 sbi->write_iostat[FS_CP_META_IO]);
572 seq_printf(seq, "fs discard: %-16llu\n",
573 sbi->write_iostat[FS_DISCARD]);
574
575 return 0;
576 }
577
578 #define F2FS_PROC_FILE_DEF(_name) \
579 static int _name##_open_fs(struct inode *inode, struct file *file) \
580 { \
581 return single_open(file, _name##_seq_show, PDE_DATA(inode)); \
582 } \
583 \
584 static const struct file_operations f2fs_seq_##_name##_fops = { \
585 .open = _name##_open_fs, \
586 .read = seq_read, \
587 .llseek = seq_lseek, \
588 .release = single_release, \
589 };
590
591 F2FS_PROC_FILE_DEF(segment_info);
592 F2FS_PROC_FILE_DEF(segment_bits);
593 F2FS_PROC_FILE_DEF(iostat_info);
594
f2fs_init_sysfs(void)595 int __init f2fs_init_sysfs(void)
596 {
597 int ret;
598
599 kobject_set_name(&f2fs_kset.kobj, "f2fs");
600 f2fs_kset.kobj.parent = fs_kobj;
601 ret = kset_register(&f2fs_kset);
602 if (ret)
603 return ret;
604
605 ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
606 NULL, "features");
607 if (ret)
608 kset_unregister(&f2fs_kset);
609 else
610 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
611 return ret;
612 }
613
f2fs_exit_sysfs(void)614 void f2fs_exit_sysfs(void)
615 {
616 kobject_put(&f2fs_feat);
617 kset_unregister(&f2fs_kset);
618 remove_proc_entry("fs/f2fs", NULL);
619 f2fs_proc_root = NULL;
620 }
621
f2fs_register_sysfs(struct f2fs_sb_info * sbi)622 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
623 {
624 struct super_block *sb = sbi->sb;
625 int err;
626
627 sbi->s_kobj.kset = &f2fs_kset;
628 init_completion(&sbi->s_kobj_unregister);
629 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
630 "%s", sb->s_id);
631 if (err)
632 return err;
633
634 if (f2fs_proc_root)
635 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
636
637 if (sbi->s_proc) {
638 proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
639 &f2fs_seq_segment_info_fops, sb);
640 proc_create_data("segment_bits", S_IRUGO, sbi->s_proc,
641 &f2fs_seq_segment_bits_fops, sb);
642 proc_create_data("iostat_info", S_IRUGO, sbi->s_proc,
643 &f2fs_seq_iostat_info_fops, sb);
644 }
645 return 0;
646 }
647
f2fs_unregister_sysfs(struct f2fs_sb_info * sbi)648 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
649 {
650 if (sbi->s_proc) {
651 remove_proc_entry("iostat_info", sbi->s_proc);
652 remove_proc_entry("segment_info", sbi->s_proc);
653 remove_proc_entry("segment_bits", sbi->s_proc);
654 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
655 }
656 kobject_del(&sbi->s_kobj);
657 }
658