1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * f2fs sysfs interface
  4 *
  5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
  6 *             http://www.samsung.com/
  7 * Copyright (c) 2017 Chao Yu <chao@kernel.org>
  8 */
  9#include <linux/compiler.h>
 10#include <linux/proc_fs.h>
 11#include <linux/f2fs_fs.h>
 12#include <linux/seq_file.h>
 13#include <linux/unicode.h>
 
 
 14
 15#include "f2fs.h"
 16#include "segment.h"
 17#include "gc.h"
 
 18
 19static struct proc_dir_entry *f2fs_proc_root;
 20
 21/* Sysfs support for f2fs */
 22enum {
 23	GC_THREAD,	/* struct f2fs_gc_thread */
 24	SM_INFO,	/* struct f2fs_sm_info */
 25	DCC_INFO,	/* struct discard_cmd_control */
 26	NM_INFO,	/* struct f2fs_nm_info */
 27	F2FS_SBI,	/* struct f2fs_sb_info */
 
 
 
 28#ifdef CONFIG_F2FS_FAULT_INJECTION
 29	FAULT_INFO_RATE,	/* struct f2fs_fault_info */
 30	FAULT_INFO_TYPE,	/* struct f2fs_fault_info */
 31#endif
 32	RESERVED_BLOCKS,	/* struct f2fs_sb_info */
 
 
 33};
 34
 35struct f2fs_attr {
 36	struct attribute attr;
 37	ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
 38	ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
 39			 const char *, size_t);
 40	int struct_type;
 41	int offset;
 42	int id;
 43};
 44
 
 
 
 45static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
 46{
 47	if (struct_type == GC_THREAD)
 48		return (unsigned char *)sbi->gc_thread;
 49	else if (struct_type == SM_INFO)
 50		return (unsigned char *)SM_I(sbi);
 51	else if (struct_type == DCC_INFO)
 52		return (unsigned char *)SM_I(sbi)->dcc_info;
 53	else if (struct_type == NM_INFO)
 54		return (unsigned char *)NM_I(sbi);
 55	else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
 56		return (unsigned char *)sbi;
 57#ifdef CONFIG_F2FS_FAULT_INJECTION
 58	else if (struct_type == FAULT_INFO_RATE ||
 59					struct_type == FAULT_INFO_TYPE)
 60		return (unsigned char *)&F2FS_OPTION(sbi).fault_info;
 61#endif
 
 
 
 
 
 
 
 
 62	return NULL;
 63}
 64
 65static ssize_t dirty_segments_show(struct f2fs_attr *a,
 66		struct f2fs_sb_info *sbi, char *buf)
 67{
 68	return snprintf(buf, PAGE_SIZE, "%llu\n",
 69		(unsigned long long)(dirty_segments(sbi)));
 70}
 71
 72static ssize_t unusable_show(struct f2fs_attr *a,
 73		struct f2fs_sb_info *sbi, char *buf)
 74{
 75	block_t unusable;
 76
 77	if (test_opt(sbi, DISABLE_CHECKPOINT))
 78		unusable = sbi->unusable_block_count;
 79	else
 80		unusable = f2fs_get_unusable_blocks(sbi);
 81	return snprintf(buf, PAGE_SIZE, "%llu\n",
 82		(unsigned long long)unusable);
 83}
 84
 85static ssize_t encoding_show(struct f2fs_attr *a,
 86		struct f2fs_sb_info *sbi, char *buf)
 87{
 88#ifdef CONFIG_UNICODE
 89	if (f2fs_sb_has_casefold(sbi))
 90		return snprintf(buf, PAGE_SIZE, "%s (%d.%d.%d)\n",
 91			sbi->s_encoding->charset,
 92			(sbi->s_encoding->version >> 16) & 0xff,
 93			(sbi->s_encoding->version >> 8) & 0xff,
 94			sbi->s_encoding->version & 0xff);
 95#endif
 96	return snprintf(buf, PAGE_SIZE, "(none)");
 97}
 98
 99static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
100		struct f2fs_sb_info *sbi, char *buf)
101{
102	struct super_block *sb = sbi->sb;
103
104	if (!sb->s_bdev->bd_part)
105		return snprintf(buf, PAGE_SIZE, "0\n");
 
106
107	return snprintf(buf, PAGE_SIZE, "%llu\n",
108		(unsigned long long)(sbi->kbytes_written +
109			BD_PART_WRITTEN(sbi)));
 
110}
111
112static ssize_t features_show(struct f2fs_attr *a,
113		struct f2fs_sb_info *sbi, char *buf)
114{
115	struct super_block *sb = sbi->sb;
116	int len = 0;
117
118	if (!sb->s_bdev->bd_part)
119		return snprintf(buf, PAGE_SIZE, "0\n");
120
121	if (f2fs_sb_has_encrypt(sbi))
122		len += snprintf(buf, PAGE_SIZE - len, "%s",
123						"encryption");
124	if (f2fs_sb_has_blkzoned(sbi))
125		len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
126				len ? ", " : "", "blkzoned");
127	if (f2fs_sb_has_extra_attr(sbi))
128		len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
129				len ? ", " : "", "extra_attr");
130	if (f2fs_sb_has_project_quota(sbi))
131		len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
132				len ? ", " : "", "projquota");
133	if (f2fs_sb_has_inode_chksum(sbi))
134		len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
135				len ? ", " : "", "inode_checksum");
136	if (f2fs_sb_has_flexible_inline_xattr(sbi))
137		len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
138				len ? ", " : "", "flexible_inline_xattr");
139	if (f2fs_sb_has_quota_ino(sbi))
140		len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
141				len ? ", " : "", "quota_ino");
142	if (f2fs_sb_has_inode_crtime(sbi))
143		len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
144				len ? ", " : "", "inode_crtime");
145	if (f2fs_sb_has_lost_found(sbi))
146		len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
147				len ? ", " : "", "lost_found");
148	if (f2fs_sb_has_verity(sbi))
149		len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
150				len ? ", " : "", "verity");
151	if (f2fs_sb_has_sb_chksum(sbi))
152		len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
153				len ? ", " : "", "sb_checksum");
154	if (f2fs_sb_has_casefold(sbi))
155		len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
156				len ? ", " : "", "casefold");
157	len += snprintf(buf + len, PAGE_SIZE - len, "\n");
 
 
 
 
 
 
 
 
158	return len;
159}
160
161static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
162					struct f2fs_sb_info *sbi, char *buf)
163{
164	return snprintf(buf, PAGE_SIZE, "%u\n", sbi->current_reserved_blocks);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
165}
166
167static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
168			struct f2fs_sb_info *sbi, char *buf)
169{
170	unsigned char *ptr = NULL;
171	unsigned int *ui;
172
173	ptr = __struct_ptr(sbi, a->struct_type);
174	if (!ptr)
175		return -EINVAL;
176
177	if (!strcmp(a->attr.name, "extension_list")) {
178		__u8 (*extlist)[F2FS_EXTENSION_LEN] =
179					sbi->raw_super->extension_list;
180		int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
181		int hot_count = sbi->raw_super->hot_ext_count;
182		int len = 0, i;
183
184		len += snprintf(buf + len, PAGE_SIZE - len,
185						"cold file extension:\n");
186		for (i = 0; i < cold_count; i++)
187			len += snprintf(buf + len, PAGE_SIZE - len, "%s\n",
188								extlist[i]);
189
190		len += snprintf(buf + len, PAGE_SIZE - len,
191						"hot file extension:\n");
192		for (i = cold_count; i < cold_count + hot_count; i++)
193			len += snprintf(buf + len, PAGE_SIZE - len, "%s\n",
194								extlist[i]);
195		return len;
196	}
197
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
198	ui = (unsigned int *)(ptr + a->offset);
199
200	return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
201}
202
203static ssize_t __sbi_store(struct f2fs_attr *a,
204			struct f2fs_sb_info *sbi,
205			const char *buf, size_t count)
206{
207	unsigned char *ptr;
208	unsigned long t;
209	unsigned int *ui;
210	ssize_t ret;
211
212	ptr = __struct_ptr(sbi, a->struct_type);
213	if (!ptr)
214		return -EINVAL;
215
216	if (!strcmp(a->attr.name, "extension_list")) {
217		const char *name = strim((char *)buf);
218		bool set = true, hot;
219
220		if (!strncmp(name, "[h]", 3))
221			hot = true;
222		else if (!strncmp(name, "[c]", 3))
223			hot = false;
224		else
225			return -EINVAL;
226
227		name += 3;
228
229		if (*name == '!') {
230			name++;
231			set = false;
232		}
233
234		if (strlen(name) >= F2FS_EXTENSION_LEN)
235			return -EINVAL;
236
237		down_write(&sbi->sb_lock);
238
239		ret = f2fs_update_extension_list(sbi, name, hot, set);
240		if (ret)
241			goto out;
242
243		ret = f2fs_commit_super(sbi, false);
244		if (ret)
245			f2fs_update_extension_list(sbi, name, hot, !set);
246out:
247		up_write(&sbi->sb_lock);
248		return ret ? ret : count;
249	}
250
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
251	ui = (unsigned int *)(ptr + a->offset);
252
253	ret = kstrtoul(skip_spaces(buf), 0, &t);
254	if (ret < 0)
255		return ret;
256#ifdef CONFIG_F2FS_FAULT_INJECTION
257	if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
258		return -EINVAL;
259	if (a->struct_type == FAULT_INFO_RATE && t >= UINT_MAX)
260		return -EINVAL;
261#endif
262	if (a->struct_type == RESERVED_BLOCKS) {
263		spin_lock(&sbi->stat_lock);
264		if (t > (unsigned long)(sbi->user_block_count -
265				F2FS_OPTION(sbi).root_reserved_blocks)) {
266			spin_unlock(&sbi->stat_lock);
267			return -EINVAL;
268		}
269		*ui = t;
270		sbi->current_reserved_blocks = min(sbi->reserved_blocks,
271				sbi->user_block_count - valid_user_blocks(sbi));
272		spin_unlock(&sbi->stat_lock);
273		return count;
274	}
275
276	if (!strcmp(a->attr.name, "discard_granularity")) {
277		if (t == 0 || t > MAX_PLIST_NUM)
278			return -EINVAL;
279		if (t == *ui)
280			return count;
281		*ui = t;
282		return count;
283	}
284
285	if (!strcmp(a->attr.name, "migration_granularity")) {
286		if (t == 0 || t > sbi->segs_per_sec)
287			return -EINVAL;
288	}
289
290	if (!strcmp(a->attr.name, "trim_sections"))
291		return -EINVAL;
292
293	if (!strcmp(a->attr.name, "gc_urgent")) {
294		if (t >= 1) {
295			sbi->gc_mode = GC_URGENT;
 
 
296			if (sbi->gc_thread) {
297				sbi->gc_thread->gc_wake = 1;
298				wake_up_interruptible_all(
299					&sbi->gc_thread->gc_wait_queue_head);
300				wake_up_discard_thread(sbi, true);
301			}
 
 
302		} else {
303			sbi->gc_mode = GC_NORMAL;
304		}
305		return count;
306	}
307	if (!strcmp(a->attr.name, "gc_idle")) {
308		if (t == GC_IDLE_CB)
309			sbi->gc_mode = GC_IDLE_CB;
310		else if (t == GC_IDLE_GREEDY)
311			sbi->gc_mode = GC_IDLE_GREEDY;
312		else
 
 
 
 
313			sbi->gc_mode = GC_NORMAL;
 
314		return count;
315	}
316
317
318	if (!strcmp(a->attr.name, "iostat_enable")) {
319		sbi->iostat_enable = !!t;
320		if (!sbi->iostat_enable)
321			f2fs_reset_iostat(sbi);
322		return count;
323	}
324
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
325	*ui = (unsigned int)t;
326
327	return count;
328}
329
330static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
331			struct f2fs_sb_info *sbi,
332			const char *buf, size_t count)
333{
334	ssize_t ret;
335	bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
336					a->struct_type == GC_THREAD);
337
338	if (gc_entry) {
339		if (!down_read_trylock(&sbi->sb->s_umount))
340			return -EAGAIN;
341	}
342	ret = __sbi_store(a, sbi, buf, count);
343	if (gc_entry)
344		up_read(&sbi->sb->s_umount);
345
346	return ret;
347}
348
349static ssize_t f2fs_attr_show(struct kobject *kobj,
350				struct attribute *attr, char *buf)
351{
352	struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
353								s_kobj);
354	struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
355
356	return a->show ? a->show(a, sbi, buf) : 0;
357}
358
359static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
360						const char *buf, size_t len)
361{
362	struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
363									s_kobj);
364	struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
365
366	return a->store ? a->store(a, sbi, buf, len) : 0;
367}
368
369static void f2fs_sb_release(struct kobject *kobj)
370{
371	struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
372								s_kobj);
373	complete(&sbi->s_kobj_unregister);
374}
375
376enum feat_id {
377	FEAT_CRYPTO = 0,
378	FEAT_BLKZONED,
379	FEAT_ATOMIC_WRITE,
380	FEAT_EXTRA_ATTR,
381	FEAT_PROJECT_QUOTA,
382	FEAT_INODE_CHECKSUM,
383	FEAT_FLEXIBLE_INLINE_XATTR,
384	FEAT_QUOTA_INO,
385	FEAT_INODE_CRTIME,
386	FEAT_LOST_FOUND,
387	FEAT_VERITY,
388	FEAT_SB_CHECKSUM,
389	FEAT_CASEFOLD,
390};
391
 
 
392static ssize_t f2fs_feature_show(struct f2fs_attr *a,
393		struct f2fs_sb_info *sbi, char *buf)
394{
395	switch (a->id) {
396	case FEAT_CRYPTO:
397	case FEAT_BLKZONED:
398	case FEAT_ATOMIC_WRITE:
399	case FEAT_EXTRA_ATTR:
400	case FEAT_PROJECT_QUOTA:
401	case FEAT_INODE_CHECKSUM:
402	case FEAT_FLEXIBLE_INLINE_XATTR:
403	case FEAT_QUOTA_INO:
404	case FEAT_INODE_CRTIME:
405	case FEAT_LOST_FOUND:
406	case FEAT_VERITY:
407	case FEAT_SB_CHECKSUM:
408	case FEAT_CASEFOLD:
409		return snprintf(buf, PAGE_SIZE, "supported\n");
410	}
411	return 0;
 
 
 
 
 
412}
413
414#define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
415static struct f2fs_attr f2fs_attr_##_name = {			\
416	.attr = {.name = __stringify(_name), .mode = _mode },	\
417	.show	= _show,					\
418	.store	= _store,					\
419	.struct_type = _struct_type,				\
420	.offset = _offset					\
421}
422
423#define F2FS_RW_ATTR(struct_type, struct_name, name, elname)	\
424	F2FS_ATTR_OFFSET(struct_type, name, 0644,		\
425		f2fs_sbi_show, f2fs_sbi_store,			\
426		offsetof(struct struct_name, elname))
427
428#define F2FS_GENERAL_RO_ATTR(name) \
429static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
430
431#define F2FS_FEATURE_RO_ATTR(_name, _id)			\
432static struct f2fs_attr f2fs_attr_##_name = {			\
433	.attr = {.name = __stringify(_name), .mode = 0444 },	\
434	.show	= f2fs_feature_show,				\
435	.id	= _id,						\
 
436}
437
438F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
439							urgent_sleep_time);
440F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
441F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
442F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
443F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode);
444F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode);
445F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
446F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
447F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
448F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
449F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
450F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
451F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
452F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
453F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks);
454F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
455F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
456F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
457F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
458F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
459F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
460F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, migration_granularity, migration_granularity);
461F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
462F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
463F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
464F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, discard_idle_interval,
465					interval_time[DISCARD_TIME]);
466F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]);
467F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info,
468		umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
469F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
 
470F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
 
471F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
472F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
473#ifdef CONFIG_F2FS_FAULT_INJECTION
474F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
475F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
476#endif
 
 
 
477F2FS_GENERAL_RO_ATTR(dirty_segments);
 
 
478F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
479F2FS_GENERAL_RO_ATTR(features);
480F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
481F2FS_GENERAL_RO_ATTR(unusable);
482F2FS_GENERAL_RO_ATTR(encoding);
 
 
 
 
 
 
 
 
 
 
 
483
484#ifdef CONFIG_FS_ENCRYPTION
485F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
 
 
 
486#endif
 
487#ifdef CONFIG_BLK_DEV_ZONED
488F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED);
489#endif
490F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE);
491F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR);
492F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA);
493F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM);
494F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR);
495F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO);
496F2FS_FEATURE_RO_ATTR(inode_crtime, FEAT_INODE_CRTIME);
497F2FS_FEATURE_RO_ATTR(lost_found, FEAT_LOST_FOUND);
498#ifdef CONFIG_FS_VERITY
499F2FS_FEATURE_RO_ATTR(verity, FEAT_VERITY);
500#endif
501F2FS_FEATURE_RO_ATTR(sb_checksum, FEAT_SB_CHECKSUM);
502F2FS_FEATURE_RO_ATTR(casefold, FEAT_CASEFOLD);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
503
504#define ATTR_LIST(name) (&f2fs_attr_##name.attr)
505static struct attribute *f2fs_attrs[] = {
506	ATTR_LIST(gc_urgent_sleep_time),
507	ATTR_LIST(gc_min_sleep_time),
508	ATTR_LIST(gc_max_sleep_time),
509	ATTR_LIST(gc_no_gc_sleep_time),
510	ATTR_LIST(gc_idle),
511	ATTR_LIST(gc_urgent),
512	ATTR_LIST(reclaim_segments),
 
513	ATTR_LIST(max_small_discards),
514	ATTR_LIST(discard_granularity),
515	ATTR_LIST(batched_trim_sections),
516	ATTR_LIST(ipu_policy),
517	ATTR_LIST(min_ipu_util),
518	ATTR_LIST(min_fsync_blocks),
519	ATTR_LIST(min_seq_blocks),
520	ATTR_LIST(min_hot_blocks),
521	ATTR_LIST(min_ssr_sections),
522	ATTR_LIST(max_victim_search),
523	ATTR_LIST(migration_granularity),
524	ATTR_LIST(dir_level),
525	ATTR_LIST(ram_thresh),
526	ATTR_LIST(ra_nid_pages),
527	ATTR_LIST(dirty_nats_ratio),
528	ATTR_LIST(cp_interval),
529	ATTR_LIST(idle_interval),
530	ATTR_LIST(discard_idle_interval),
531	ATTR_LIST(gc_idle_interval),
532	ATTR_LIST(umount_discard_timeout),
533	ATTR_LIST(iostat_enable),
 
534	ATTR_LIST(readdir_ra),
 
535	ATTR_LIST(gc_pin_file_thresh),
536	ATTR_LIST(extension_list),
537#ifdef CONFIG_F2FS_FAULT_INJECTION
538	ATTR_LIST(inject_rate),
539	ATTR_LIST(inject_type),
540#endif
 
 
 
541	ATTR_LIST(dirty_segments),
 
 
542	ATTR_LIST(unusable),
543	ATTR_LIST(lifetime_write_kbytes),
544	ATTR_LIST(features),
545	ATTR_LIST(reserved_blocks),
546	ATTR_LIST(current_reserved_blocks),
547	ATTR_LIST(encoding),
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
548	NULL,
549};
550ATTRIBUTE_GROUPS(f2fs);
551
552static struct attribute *f2fs_feat_attrs[] = {
553#ifdef CONFIG_FS_ENCRYPTION
554	ATTR_LIST(encryption),
 
 
 
555#endif
 
556#ifdef CONFIG_BLK_DEV_ZONED
557	ATTR_LIST(block_zoned),
558#endif
559	ATTR_LIST(atomic_write),
560	ATTR_LIST(extra_attr),
561	ATTR_LIST(project_quota),
562	ATTR_LIST(inode_checksum),
563	ATTR_LIST(flexible_inline_xattr),
564	ATTR_LIST(quota_ino),
565	ATTR_LIST(inode_crtime),
566	ATTR_LIST(lost_found),
567#ifdef CONFIG_FS_VERITY
568	ATTR_LIST(verity),
569#endif
570	ATTR_LIST(sb_checksum),
 
571	ATTR_LIST(casefold),
 
 
 
 
 
 
572	NULL,
573};
574ATTRIBUTE_GROUPS(f2fs_feat);
575
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
576static const struct sysfs_ops f2fs_attr_ops = {
577	.show	= f2fs_attr_show,
578	.store	= f2fs_attr_store,
579};
580
581static struct kobj_type f2fs_sb_ktype = {
582	.default_groups = f2fs_groups,
583	.sysfs_ops	= &f2fs_attr_ops,
584	.release	= f2fs_sb_release,
585};
586
587static struct kobj_type f2fs_ktype = {
588	.sysfs_ops	= &f2fs_attr_ops,
589};
590
591static struct kset f2fs_kset = {
592	.kobj   = {.ktype = &f2fs_ktype},
593};
594
595static struct kobj_type f2fs_feat_ktype = {
596	.default_groups = f2fs_feat_groups,
597	.sysfs_ops	= &f2fs_attr_ops,
598};
599
600static struct kobject f2fs_feat = {
601	.kset	= &f2fs_kset,
602};
603
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
604static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
605						void *offset)
606{
607	struct super_block *sb = seq->private;
608	struct f2fs_sb_info *sbi = F2FS_SB(sb);
609	unsigned int total_segs =
610			le32_to_cpu(sbi->raw_super->segment_count_main);
611	int i;
612
613	seq_puts(seq, "format: segment_type|valid_blocks\n"
614		"segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
615
616	for (i = 0; i < total_segs; i++) {
617		struct seg_entry *se = get_seg_entry(sbi, i);
618
619		if ((i % 10) == 0)
620			seq_printf(seq, "%-10d", i);
621		seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
622		if ((i % 10) == 9 || i == (total_segs - 1))
623			seq_putc(seq, '\n');
624		else
625			seq_putc(seq, ' ');
626	}
627
628	return 0;
629}
630
631static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
632						void *offset)
633{
634	struct super_block *sb = seq->private;
635	struct f2fs_sb_info *sbi = F2FS_SB(sb);
636	unsigned int total_segs =
637			le32_to_cpu(sbi->raw_super->segment_count_main);
638	int i, j;
639
640	seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
641		"segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
642
643	for (i = 0; i < total_segs; i++) {
644		struct seg_entry *se = get_seg_entry(sbi, i);
645
646		seq_printf(seq, "%-10d", i);
647		seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
648		for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
649			seq_printf(seq, " %.2x", se->cur_valid_map[j]);
650		seq_putc(seq, '\n');
651	}
652	return 0;
653}
654
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
655static int __maybe_unused iostat_info_seq_show(struct seq_file *seq,
656					       void *offset)
657{
658	struct super_block *sb = seq->private;
659	struct f2fs_sb_info *sbi = F2FS_SB(sb);
660	time64_t now = ktime_get_real_seconds();
661
662	if (!sbi->iostat_enable)
663		return 0;
664
665	seq_printf(seq, "time:		%-16llu\n", now);
666
667	/* print app IOs */
 
668	seq_printf(seq, "app buffered:	%-16llu\n",
669				sbi->write_iostat[APP_BUFFERED_IO]);
670	seq_printf(seq, "app direct:	%-16llu\n",
671				sbi->write_iostat[APP_DIRECT_IO]);
672	seq_printf(seq, "app mapped:	%-16llu\n",
673				sbi->write_iostat[APP_MAPPED_IO]);
674
675	/* print fs IOs */
676	seq_printf(seq, "fs data:	%-16llu\n",
677				sbi->write_iostat[FS_DATA_IO]);
678	seq_printf(seq, "fs node:	%-16llu\n",
679				sbi->write_iostat[FS_NODE_IO]);
680	seq_printf(seq, "fs meta:	%-16llu\n",
681				sbi->write_iostat[FS_META_IO]);
682	seq_printf(seq, "fs gc data:	%-16llu\n",
683				sbi->write_iostat[FS_GC_DATA_IO]);
684	seq_printf(seq, "fs gc node:	%-16llu\n",
685				sbi->write_iostat[FS_GC_NODE_IO]);
686	seq_printf(seq, "fs cp data:	%-16llu\n",
687				sbi->write_iostat[FS_CP_DATA_IO]);
688	seq_printf(seq, "fs cp node:	%-16llu\n",
689				sbi->write_iostat[FS_CP_NODE_IO]);
690	seq_printf(seq, "fs cp meta:	%-16llu\n",
691				sbi->write_iostat[FS_CP_META_IO]);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
692	seq_printf(seq, "fs discard:	%-16llu\n",
693				sbi->write_iostat[FS_DISCARD]);
694
695	return 0;
696}
697
698static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
699						void *offset)
700{
701	struct super_block *sb = seq->private;
702	struct f2fs_sb_info *sbi = F2FS_SB(sb);
703	struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
704	int i;
705
706	seq_puts(seq, "format: victim_secmap bitmaps\n");
707
708	for (i = 0; i < MAIN_SECS(sbi); i++) {
709		if ((i % 10) == 0)
710			seq_printf(seq, "%-10d", i);
711		seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
712		if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
713			seq_putc(seq, '\n');
714		else
715			seq_putc(seq, ' ');
716	}
717	return 0;
718}
719
720int __init f2fs_init_sysfs(void)
721{
722	int ret;
723
724	kobject_set_name(&f2fs_kset.kobj, "f2fs");
725	f2fs_kset.kobj.parent = fs_kobj;
726	ret = kset_register(&f2fs_kset);
727	if (ret)
728		return ret;
729
730	ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
731				   NULL, "features");
732	if (ret)
 
733		kset_unregister(&f2fs_kset);
734	else
735		f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
 
736	return ret;
737}
738
739void f2fs_exit_sysfs(void)
740{
741	kobject_put(&f2fs_feat);
742	kset_unregister(&f2fs_kset);
743	remove_proc_entry("fs/f2fs", NULL);
744	f2fs_proc_root = NULL;
745}
746
747int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
748{
749	struct super_block *sb = sbi->sb;
750	int err;
751
752	sbi->s_kobj.kset = &f2fs_kset;
753	init_completion(&sbi->s_kobj_unregister);
754	err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
755				"%s", sb->s_id);
756	if (err)
757		return err;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
758
759	if (f2fs_proc_root)
760		sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
761
762	if (sbi->s_proc) {
763		proc_create_single_data("segment_info", S_IRUGO, sbi->s_proc,
764				segment_info_seq_show, sb);
765		proc_create_single_data("segment_bits", S_IRUGO, sbi->s_proc,
766				segment_bits_seq_show, sb);
767		proc_create_single_data("iostat_info", S_IRUGO, sbi->s_proc,
768				iostat_info_seq_show, sb);
769		proc_create_single_data("victim_bits", S_IRUGO, sbi->s_proc,
770				victim_bits_seq_show, sb);
771	}
772	return 0;
 
 
 
 
 
 
 
 
 
 
773}
774
775void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
776{
777	if (sbi->s_proc) {
778		remove_proc_entry("iostat_info", sbi->s_proc);
779		remove_proc_entry("segment_info", sbi->s_proc);
780		remove_proc_entry("segment_bits", sbi->s_proc);
781		remove_proc_entry("victim_bits", sbi->s_proc);
782		remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
783	}
 
 
 
 
 
 
 
 
784	kobject_del(&sbi->s_kobj);
 
 
785}