linux/fs/f2fs/sysfs.c
Linus Torvalds 6abaa83c73 f2fs-for-5.15-rc1
In this cycle, we've addressed some performance issues such as lock contention,
 misbehaving compress_cache, allowing extent_cache for compressed files, and new
 sysfs to adjust ra_size for fadvise. In order to diagnose the performance issues
 quickly, we also added an iostat which shows the IO latencies periodically. On
 the stability side, we've found two memory leakage cases in the error path in
 compression flow. And, we've also fixed various corner cases in fiemap, quota,
 checkpoint=disable, zstd, and so on.
 
 Enhancement:
  - avoid long checkpoint latency by releasing nat_tree_lock
  - collect and show iostats periodically
  - support extent_cache for compressed files
  - add a sysfs entry to manage ra_size given fadvise(POSIX_FADV_SEQUENTIAL)
  - report f2fs GC status via sysfs
  - add discard_unit=%s in mount option to handle zoned device
 
 Bug fix:
  - fix two memory leakages when an error happens in the compressed IO flow
  - fix commpress_cache to get the right LBA
  - fix fiemap to deal with compressed case correctly
  - fix wrong EIO returns due to SBI_NEED_FSCK
  - fix missing writes when enabling checkpoint back
  - fix quota deadlock
  - fix zstd level mount option
 
 In addition to the above major updates, we've cleaned up several code paths such
 as dio, unnecessary operations, debugfs/f2fs/status, sanity check, and typos.
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Merge tag 'f2fs-for-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs

Pull f2fs updates from Jaegeuk Kim:
 "In this cycle, we've addressed some performance issues such as lock
  contention, misbehaving compress_cache, allowing extent_cache for
  compressed files, and new sysfs to adjust ra_size for fadvise.

  In order to diagnose the performance issues quickly, we also added an
  iostat which shows the IO latencies periodically.

  On the stability side, we've found two memory leakage cases in the
  error path in compression flow. And, we've also fixed various corner
  cases in fiemap, quota, checkpoint=disable, zstd, and so on.

  Enhancements:
   - avoid long checkpoint latency by releasing nat_tree_lock
   - collect and show iostats periodically
   - support extent_cache for compressed files
   - add a sysfs entry to manage ra_size given fadvise(POSIX_FADV_SEQUENTIAL)
   - report f2fs GC status via sysfs
   - add discard_unit=%s in mount option to handle zoned device

  Bug fixes:
   - fix two memory leakages when an error happens in the compressed IO flow
   - fix commpress_cache to get the right LBA
   - fix fiemap to deal with compressed case correctly
   - fix wrong EIO returns due to SBI_NEED_FSCK
   - fix missing writes when enabling checkpoint back
   - fix quota deadlock
   - fix zstd level mount option

  In addition to the above major updates, we've cleaned up several code
  paths such as dio, unnecessary operations, debugfs/f2fs/status, sanity
  check, and typos"

* tag 'f2fs-for-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (46 commits)
  f2fs: should put a page beyond EOF when preparing a write
  f2fs: deallocate compressed pages when error happens
  f2fs: enable realtime discard iff device supports discard
  f2fs: guarantee to write dirty data when enabling checkpoint back
  f2fs: fix to unmap pages from userspace process in punch_hole()
  f2fs: fix unexpected ENOENT comes from f2fs_map_blocks()
  f2fs: fix to account missing .skipped_gc_rwsem
  f2fs: adjust unlock order for cleanup
  f2fs: Don't create discard thread when device doesn't support realtime discard
  f2fs: rebuild nat_bits during umount
  f2fs: introduce periodic iostat io latency traces
  f2fs: separate out iostat feature
  f2fs: compress: do sanity check on cluster
  f2fs: fix description about main_blkaddr node
  f2fs: convert S_IRUGO to 0444
  f2fs: fix to keep compatibility of fault injection interface
  f2fs: support fault injection for f2fs_kmem_cache_alloc()
  f2fs: compress: allow write compress released file after truncate to zero
  f2fs: correct comment in segment.h
  f2fs: improve sbi status info in debugfs/f2fs/status
  ...
2021-09-04 10:48:47 -07:00

1215 lines
35 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* f2fs sysfs interface
*
* Copyright (c) 2012 Samsung Electronics Co., Ltd.
* http://www.samsung.com/
* Copyright (c) 2017 Chao Yu <chao@kernel.org>
*/
#include <linux/compiler.h>
#include <linux/proc_fs.h>
#include <linux/f2fs_fs.h>
#include <linux/seq_file.h>
#include <linux/unicode.h>
#include <linux/ioprio.h>
#include <linux/sysfs.h>
#include "f2fs.h"
#include "segment.h"
#include "gc.h"
#include "iostat.h"
#include <trace/events/f2fs.h>
static struct proc_dir_entry *f2fs_proc_root;
/* Sysfs support for f2fs */
enum {
GC_THREAD, /* struct f2fs_gc_thread */
SM_INFO, /* struct f2fs_sm_info */
DCC_INFO, /* struct discard_cmd_control */
NM_INFO, /* struct f2fs_nm_info */
F2FS_SBI, /* struct f2fs_sb_info */
#ifdef CONFIG_F2FS_STAT_FS
STAT_INFO, /* struct f2fs_stat_info */
#endif
#ifdef CONFIG_F2FS_FAULT_INJECTION
FAULT_INFO_RATE, /* struct f2fs_fault_info */
FAULT_INFO_TYPE, /* struct f2fs_fault_info */
#endif
RESERVED_BLOCKS, /* struct f2fs_sb_info */
CPRC_INFO, /* struct ckpt_req_control */
ATGC_INFO, /* struct atgc_management */
};
struct f2fs_attr {
struct attribute attr;
ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
const char *, size_t);
int struct_type;
int offset;
int id;
};
static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf);
static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
{
if (struct_type == GC_THREAD)
return (unsigned char *)sbi->gc_thread;
else if (struct_type == SM_INFO)
return (unsigned char *)SM_I(sbi);
else if (struct_type == DCC_INFO)
return (unsigned char *)SM_I(sbi)->dcc_info;
else if (struct_type == NM_INFO)
return (unsigned char *)NM_I(sbi);
else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
return (unsigned char *)sbi;
#ifdef CONFIG_F2FS_FAULT_INJECTION
else if (struct_type == FAULT_INFO_RATE ||
struct_type == FAULT_INFO_TYPE)
return (unsigned char *)&F2FS_OPTION(sbi).fault_info;
#endif
#ifdef CONFIG_F2FS_STAT_FS
else if (struct_type == STAT_INFO)
return (unsigned char *)F2FS_STAT(sbi);
#endif
else if (struct_type == CPRC_INFO)
return (unsigned char *)&sbi->cprc_info;
else if (struct_type == ATGC_INFO)
return (unsigned char *)&sbi->am;
return NULL;
}
static ssize_t dirty_segments_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
return sprintf(buf, "%llu\n",
(unsigned long long)(dirty_segments(sbi)));
}
static ssize_t free_segments_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
return sprintf(buf, "%llu\n",
(unsigned long long)(free_segments(sbi)));
}
static ssize_t ovp_segments_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
return sprintf(buf, "%llu\n",
(unsigned long long)(overprovision_segments(sbi)));
}
static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
return sprintf(buf, "%llu\n",
(unsigned long long)(sbi->kbytes_written +
((f2fs_get_sectors_written(sbi) -
sbi->sectors_written_start) >> 1)));
}
static ssize_t sb_status_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
return sprintf(buf, "%lx\n", sbi->s_flag);
}
static ssize_t features_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
int len = 0;
if (f2fs_sb_has_encrypt(sbi))
len += scnprintf(buf, PAGE_SIZE - len, "%s",
"encryption");
if (f2fs_sb_has_blkzoned(sbi))
len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
len ? ", " : "", "blkzoned");
if (f2fs_sb_has_extra_attr(sbi))
len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
len ? ", " : "", "extra_attr");
if (f2fs_sb_has_project_quota(sbi))
len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
len ? ", " : "", "projquota");
if (f2fs_sb_has_inode_chksum(sbi))
len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
len ? ", " : "", "inode_checksum");
if (f2fs_sb_has_flexible_inline_xattr(sbi))
len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
len ? ", " : "", "flexible_inline_xattr");
if (f2fs_sb_has_quota_ino(sbi))
len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
len ? ", " : "", "quota_ino");
if (f2fs_sb_has_inode_crtime(sbi))
len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
len ? ", " : "", "inode_crtime");
if (f2fs_sb_has_lost_found(sbi))
len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
len ? ", " : "", "lost_found");
if (f2fs_sb_has_verity(sbi))
len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
len ? ", " : "", "verity");
if (f2fs_sb_has_sb_chksum(sbi))
len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
len ? ", " : "", "sb_checksum");
if (f2fs_sb_has_casefold(sbi))
len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
len ? ", " : "", "casefold");
if (f2fs_sb_has_readonly(sbi))
len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
len ? ", " : "", "readonly");
if (f2fs_sb_has_compression(sbi))
len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
len ? ", " : "", "compression");
len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s",
len ? ", " : "", "pin_file");
len += scnprintf(buf + len, PAGE_SIZE - len, "\n");
return len;
}
static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
return sprintf(buf, "%u\n", sbi->current_reserved_blocks);
}
static ssize_t unusable_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
block_t unusable;
if (test_opt(sbi, DISABLE_CHECKPOINT))
unusable = sbi->unusable_block_count;
else
unusable = f2fs_get_unusable_blocks(sbi);
return sprintf(buf, "%llu\n", (unsigned long long)unusable);
}
static ssize_t encoding_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
#ifdef CONFIG_UNICODE
struct super_block *sb = sbi->sb;
if (f2fs_sb_has_casefold(sbi))
return snprintf(buf, PAGE_SIZE, "%s (%d.%d.%d)\n",
sb->s_encoding->charset,
(sb->s_encoding->version >> 16) & 0xff,
(sb->s_encoding->version >> 8) & 0xff,
sb->s_encoding->version & 0xff);
#endif
return sprintf(buf, "(none)");
}
static ssize_t mounted_time_sec_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
return sprintf(buf, "%llu", SIT_I(sbi)->mounted_time);
}
#ifdef CONFIG_F2FS_STAT_FS
static ssize_t moved_blocks_foreground_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
struct f2fs_stat_info *si = F2FS_STAT(sbi);
return sprintf(buf, "%llu\n",
(unsigned long long)(si->tot_blks -
(si->bg_data_blks + si->bg_node_blks)));
}
static ssize_t moved_blocks_background_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
struct f2fs_stat_info *si = F2FS_STAT(sbi);
return sprintf(buf, "%llu\n",
(unsigned long long)(si->bg_data_blks + si->bg_node_blks));
}
static ssize_t avg_vblocks_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
struct f2fs_stat_info *si = F2FS_STAT(sbi);
si->dirty_count = dirty_segments(sbi);
f2fs_update_sit_info(sbi);
return sprintf(buf, "%llu\n", (unsigned long long)(si->avg_vblocks));
}
#endif
static ssize_t main_blkaddr_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%llu\n",
(unsigned long long)MAIN_BLKADDR(sbi));
}
static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
unsigned char *ptr = NULL;
unsigned int *ui;
ptr = __struct_ptr(sbi, a->struct_type);
if (!ptr)
return -EINVAL;
if (!strcmp(a->attr.name, "extension_list")) {
__u8 (*extlist)[F2FS_EXTENSION_LEN] =
sbi->raw_super->extension_list;
int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
int hot_count = sbi->raw_super->hot_ext_count;
int len = 0, i;
len += scnprintf(buf + len, PAGE_SIZE - len,
"cold file extension:\n");
for (i = 0; i < cold_count; i++)
len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
extlist[i]);
len += scnprintf(buf + len, PAGE_SIZE - len,
"hot file extension:\n");
for (i = cold_count; i < cold_count + hot_count; i++)
len += scnprintf(buf + len, PAGE_SIZE - len, "%s\n",
extlist[i]);
return len;
}
if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
struct ckpt_req_control *cprc = &sbi->cprc_info;
int len = 0;
int class = IOPRIO_PRIO_CLASS(cprc->ckpt_thread_ioprio);
int data = IOPRIO_PRIO_DATA(cprc->ckpt_thread_ioprio);
if (class == IOPRIO_CLASS_RT)
len += scnprintf(buf + len, PAGE_SIZE - len, "rt,");
else if (class == IOPRIO_CLASS_BE)
len += scnprintf(buf + len, PAGE_SIZE - len, "be,");
else
return -EINVAL;
len += scnprintf(buf + len, PAGE_SIZE - len, "%d\n", data);
return len;
}
#ifdef CONFIG_F2FS_FS_COMPRESSION
if (!strcmp(a->attr.name, "compr_written_block"))
return sysfs_emit(buf, "%llu\n", sbi->compr_written_block);
if (!strcmp(a->attr.name, "compr_saved_block"))
return sysfs_emit(buf, "%llu\n", sbi->compr_saved_block);
if (!strcmp(a->attr.name, "compr_new_inode"))
return sysfs_emit(buf, "%u\n", sbi->compr_new_inode);
#endif
if (!strcmp(a->attr.name, "gc_segment_mode"))
return sysfs_emit(buf, "%u\n", sbi->gc_segment_mode);
if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
return sysfs_emit(buf, "%u\n",
sbi->gc_reclaimed_segs[sbi->gc_segment_mode]);
}
ui = (unsigned int *)(ptr + a->offset);
return sprintf(buf, "%u\n", *ui);
}
static ssize_t __sbi_store(struct f2fs_attr *a,
struct f2fs_sb_info *sbi,
const char *buf, size_t count)
{
unsigned char *ptr;
unsigned long t;
unsigned int *ui;
ssize_t ret;
ptr = __struct_ptr(sbi, a->struct_type);
if (!ptr)
return -EINVAL;
if (!strcmp(a->attr.name, "extension_list")) {
const char *name = strim((char *)buf);
bool set = true, hot;
if (!strncmp(name, "[h]", 3))
hot = true;
else if (!strncmp(name, "[c]", 3))
hot = false;
else
return -EINVAL;
name += 3;
if (*name == '!') {
name++;
set = false;
}
if (!strlen(name) || strlen(name) >= F2FS_EXTENSION_LEN)
return -EINVAL;
down_write(&sbi->sb_lock);
ret = f2fs_update_extension_list(sbi, name, hot, set);
if (ret)
goto out;
ret = f2fs_commit_super(sbi, false);
if (ret)
f2fs_update_extension_list(sbi, name, hot, !set);
out:
up_write(&sbi->sb_lock);
return ret ? ret : count;
}
if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
const char *name = strim((char *)buf);
struct ckpt_req_control *cprc = &sbi->cprc_info;
int class;
long data;
int ret;
if (!strncmp(name, "rt,", 3))
class = IOPRIO_CLASS_RT;
else if (!strncmp(name, "be,", 3))
class = IOPRIO_CLASS_BE;
else
return -EINVAL;
name += 3;
ret = kstrtol(name, 10, &data);
if (ret)
return ret;
if (data >= IOPRIO_NR_LEVELS || data < 0)
return -EINVAL;
cprc->ckpt_thread_ioprio = IOPRIO_PRIO_VALUE(class, data);
if (test_opt(sbi, MERGE_CHECKPOINT)) {
ret = set_task_ioprio(cprc->f2fs_issue_ckpt,
cprc->ckpt_thread_ioprio);
if (ret)
return ret;
}
return count;
}
ui = (unsigned int *)(ptr + a->offset);
ret = kstrtoul(skip_spaces(buf), 0, &t);
if (ret < 0)
return ret;
#ifdef CONFIG_F2FS_FAULT_INJECTION
if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
return -EINVAL;
if (a->struct_type == FAULT_INFO_RATE && t >= UINT_MAX)
return -EINVAL;
#endif
if (a->struct_type == RESERVED_BLOCKS) {
spin_lock(&sbi->stat_lock);
if (t > (unsigned long)(sbi->user_block_count -
F2FS_OPTION(sbi).root_reserved_blocks)) {
spin_unlock(&sbi->stat_lock);
return -EINVAL;
}
*ui = t;
sbi->current_reserved_blocks = min(sbi->reserved_blocks,
sbi->user_block_count - valid_user_blocks(sbi));
spin_unlock(&sbi->stat_lock);
return count;
}
if (!strcmp(a->attr.name, "discard_granularity")) {
if (t == 0 || t > MAX_PLIST_NUM)
return -EINVAL;
if (!f2fs_block_unit_discard(sbi))
return -EINVAL;
if (t == *ui)
return count;
*ui = t;
return count;
}
if (!strcmp(a->attr.name, "migration_granularity")) {
if (t == 0 || t > sbi->segs_per_sec)
return -EINVAL;
}
if (!strcmp(a->attr.name, "trim_sections"))
return -EINVAL;
if (!strcmp(a->attr.name, "gc_urgent")) {
if (t == 0) {
sbi->gc_mode = GC_NORMAL;
} else if (t == 1) {
sbi->gc_mode = GC_URGENT_HIGH;
if (sbi->gc_thread) {
sbi->gc_thread->gc_wake = 1;
wake_up_interruptible_all(
&sbi->gc_thread->gc_wait_queue_head);
wake_up_discard_thread(sbi, true);
}
} else if (t == 2) {
sbi->gc_mode = GC_URGENT_LOW;
} else {
return -EINVAL;
}
return count;
}
if (!strcmp(a->attr.name, "gc_idle")) {
if (t == GC_IDLE_CB) {
sbi->gc_mode = GC_IDLE_CB;
} else if (t == GC_IDLE_GREEDY) {
sbi->gc_mode = GC_IDLE_GREEDY;
} else if (t == GC_IDLE_AT) {
if (!sbi->am.atgc_enabled)
return -EINVAL;
sbi->gc_mode = GC_AT;
} else {
sbi->gc_mode = GC_NORMAL;
}
return count;
}
#ifdef CONFIG_F2FS_IOSTAT
if (!strcmp(a->attr.name, "iostat_enable")) {
sbi->iostat_enable = !!t;
if (!sbi->iostat_enable)
f2fs_reset_iostat(sbi);
return count;
}
if (!strcmp(a->attr.name, "iostat_period_ms")) {
if (t < MIN_IOSTAT_PERIOD_MS || t > MAX_IOSTAT_PERIOD_MS)
return -EINVAL;
spin_lock(&sbi->iostat_lock);
sbi->iostat_period_ms = (unsigned int)t;
spin_unlock(&sbi->iostat_lock);
return count;
}
#endif
#ifdef CONFIG_F2FS_FS_COMPRESSION
if (!strcmp(a->attr.name, "compr_written_block") ||
!strcmp(a->attr.name, "compr_saved_block")) {
if (t != 0)
return -EINVAL;
sbi->compr_written_block = 0;
sbi->compr_saved_block = 0;
return count;
}
if (!strcmp(a->attr.name, "compr_new_inode")) {
if (t != 0)
return -EINVAL;
sbi->compr_new_inode = 0;
return count;
}
#endif
if (!strcmp(a->attr.name, "atgc_candidate_ratio")) {
if (t > 100)
return -EINVAL;
sbi->am.candidate_ratio = t;
return count;
}
if (!strcmp(a->attr.name, "atgc_age_weight")) {
if (t > 100)
return -EINVAL;
sbi->am.age_weight = t;
return count;
}
if (!strcmp(a->attr.name, "gc_segment_mode")) {
if (t < MAX_GC_MODE)
sbi->gc_segment_mode = t;
else
return -EINVAL;
return count;
}
if (!strcmp(a->attr.name, "gc_reclaimed_segments")) {
if (t != 0)
return -EINVAL;
sbi->gc_reclaimed_segs[sbi->gc_segment_mode] = 0;
return count;
}
if (!strcmp(a->attr.name, "seq_file_ra_mul")) {
if (t >= MIN_RA_MUL && t <= MAX_RA_MUL)
sbi->seq_file_ra_mul = t;
else
return -EINVAL;
return count;
}
*ui = (unsigned int)t;
return count;
}
static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
struct f2fs_sb_info *sbi,
const char *buf, size_t count)
{
ssize_t ret;
bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
a->struct_type == GC_THREAD);
if (gc_entry) {
if (!down_read_trylock(&sbi->sb->s_umount))
return -EAGAIN;
}
ret = __sbi_store(a, sbi, buf, count);
if (gc_entry)
up_read(&sbi->sb->s_umount);
return ret;
}
static ssize_t f2fs_attr_show(struct kobject *kobj,
struct attribute *attr, char *buf)
{
struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
s_kobj);
struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
return a->show ? a->show(a, sbi, buf) : 0;
}
static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
const char *buf, size_t len)
{
struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
s_kobj);
struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
return a->store ? a->store(a, sbi, buf, len) : 0;
}
static void f2fs_sb_release(struct kobject *kobj)
{
struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
s_kobj);
complete(&sbi->s_kobj_unregister);
}
/*
* Note that there are three feature list entries:
* 1) /sys/fs/f2fs/features
* : shows runtime features supported by in-kernel f2fs along with Kconfig.
* - ref. F2FS_FEATURE_RO_ATTR()
*
* 2) /sys/fs/f2fs/$s_id/features <deprecated>
* : shows on-disk features enabled by mkfs.f2fs, used for old kernels. This
* won't add new feature anymore, and thus, users should check entries in 3)
* instead of this 2).
*
* 3) /sys/fs/f2fs/$s_id/feature_list
* : shows on-disk features enabled by mkfs.f2fs per instance, which follows
* sysfs entry rule where each entry should expose single value.
* This list covers old feature list provided by 2) and beyond. Therefore,
* please add new on-disk feature in this list only.
* - ref. F2FS_SB_FEATURE_RO_ATTR()
*/
static ssize_t f2fs_feature_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
return sprintf(buf, "supported\n");
}
#define F2FS_FEATURE_RO_ATTR(_name) \
static struct f2fs_attr f2fs_attr_##_name = { \
.attr = {.name = __stringify(_name), .mode = 0444 }, \
.show = f2fs_feature_show, \
}
static ssize_t f2fs_sb_feature_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
if (F2FS_HAS_FEATURE(sbi, a->id))
return sprintf(buf, "supported\n");
return sprintf(buf, "unsupported\n");
}
#define F2FS_SB_FEATURE_RO_ATTR(_name, _feat) \
static struct f2fs_attr f2fs_attr_sb_##_name = { \
.attr = {.name = __stringify(_name), .mode = 0444 }, \
.show = f2fs_sb_feature_show, \
.id = F2FS_FEATURE_##_feat, \
}
#define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
static struct f2fs_attr f2fs_attr_##_name = { \
.attr = {.name = __stringify(_name), .mode = _mode }, \
.show = _show, \
.store = _store, \
.struct_type = _struct_type, \
.offset = _offset \
}
#define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \
F2FS_ATTR_OFFSET(struct_type, name, 0644, \
f2fs_sbi_show, f2fs_sbi_store, \
offsetof(struct struct_name, elname))
#define F2FS_GENERAL_RO_ATTR(name) \
static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
#define F2FS_STAT_ATTR(_struct_type, _struct_name, _name, _elname) \
static struct f2fs_attr f2fs_attr_##_name = { \
.attr = {.name = __stringify(_name), .mode = 0444 }, \
.show = f2fs_sbi_show, \
.struct_type = _struct_type, \
.offset = offsetof(struct _struct_name, _elname), \
}
F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
urgent_sleep_time);
F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode);
F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks);
F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, migration_granularity, migration_granularity);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, discard_idle_interval,
interval_time[DISCARD_TIME]);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info,
umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
#ifdef CONFIG_F2FS_IOSTAT
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_period_ms, iostat_period_ms);
#endif
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_io_bytes, max_io_bytes);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
#ifdef CONFIG_F2FS_FAULT_INJECTION
F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
#endif
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, data_io_flag, data_io_flag);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, node_io_flag, node_io_flag);
F2FS_RW_ATTR(CPRC_INFO, ckpt_req_control, ckpt_thread_ioprio, ckpt_thread_ioprio);
F2FS_GENERAL_RO_ATTR(dirty_segments);
F2FS_GENERAL_RO_ATTR(free_segments);
F2FS_GENERAL_RO_ATTR(ovp_segments);
F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
F2FS_GENERAL_RO_ATTR(features);
F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
F2FS_GENERAL_RO_ATTR(unusable);
F2FS_GENERAL_RO_ATTR(encoding);
F2FS_GENERAL_RO_ATTR(mounted_time_sec);
F2FS_GENERAL_RO_ATTR(main_blkaddr);
#ifdef CONFIG_F2FS_STAT_FS
F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_foreground_calls, cp_count);
F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_background_calls, bg_cp_count);
F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_foreground_calls, call_count);
F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, gc_background_calls, bg_gc);
F2FS_GENERAL_RO_ATTR(moved_blocks_background);
F2FS_GENERAL_RO_ATTR(moved_blocks_foreground);
F2FS_GENERAL_RO_ATTR(avg_vblocks);
#endif
#ifdef CONFIG_FS_ENCRYPTION
F2FS_FEATURE_RO_ATTR(encryption);
F2FS_FEATURE_RO_ATTR(test_dummy_encryption_v2);
#ifdef CONFIG_UNICODE
F2FS_FEATURE_RO_ATTR(encrypted_casefold);
#endif
#endif /* CONFIG_FS_ENCRYPTION */
#ifdef CONFIG_BLK_DEV_ZONED
F2FS_FEATURE_RO_ATTR(block_zoned);
#endif
F2FS_FEATURE_RO_ATTR(atomic_write);
F2FS_FEATURE_RO_ATTR(extra_attr);
F2FS_FEATURE_RO_ATTR(project_quota);
F2FS_FEATURE_RO_ATTR(inode_checksum);
F2FS_FEATURE_RO_ATTR(flexible_inline_xattr);
F2FS_FEATURE_RO_ATTR(quota_ino);
F2FS_FEATURE_RO_ATTR(inode_crtime);
F2FS_FEATURE_RO_ATTR(lost_found);
#ifdef CONFIG_FS_VERITY
F2FS_FEATURE_RO_ATTR(verity);
#endif
F2FS_FEATURE_RO_ATTR(sb_checksum);
#ifdef CONFIG_UNICODE
F2FS_FEATURE_RO_ATTR(casefold);
#endif
F2FS_FEATURE_RO_ATTR(readonly);
#ifdef CONFIG_F2FS_FS_COMPRESSION
F2FS_FEATURE_RO_ATTR(compression);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_written_block, compr_written_block);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_saved_block, compr_saved_block);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, compr_new_inode, compr_new_inode);
#endif
F2FS_FEATURE_RO_ATTR(pin_file);
/* For ATGC */
F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_candidate_ratio, candidate_ratio);
F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_candidate_count, max_candidate_count);
F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_age_weight, age_weight);
F2FS_RW_ATTR(ATGC_INFO, atgc_management, atgc_age_threshold, age_threshold);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, seq_file_ra_mul, seq_file_ra_mul);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_segment_mode, gc_segment_mode);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_reclaimed_segments, gc_reclaimed_segs);
#define ATTR_LIST(name) (&f2fs_attr_##name.attr)
static struct attribute *f2fs_attrs[] = {
ATTR_LIST(gc_urgent_sleep_time),
ATTR_LIST(gc_min_sleep_time),
ATTR_LIST(gc_max_sleep_time),
ATTR_LIST(gc_no_gc_sleep_time),
ATTR_LIST(gc_idle),
ATTR_LIST(gc_urgent),
ATTR_LIST(reclaim_segments),
ATTR_LIST(main_blkaddr),
ATTR_LIST(max_small_discards),
ATTR_LIST(discard_granularity),
ATTR_LIST(batched_trim_sections),
ATTR_LIST(ipu_policy),
ATTR_LIST(min_ipu_util),
ATTR_LIST(min_fsync_blocks),
ATTR_LIST(min_seq_blocks),
ATTR_LIST(min_hot_blocks),
ATTR_LIST(min_ssr_sections),
ATTR_LIST(max_victim_search),
ATTR_LIST(migration_granularity),
ATTR_LIST(dir_level),
ATTR_LIST(ram_thresh),
ATTR_LIST(ra_nid_pages),
ATTR_LIST(dirty_nats_ratio),
ATTR_LIST(cp_interval),
ATTR_LIST(idle_interval),
ATTR_LIST(discard_idle_interval),
ATTR_LIST(gc_idle_interval),
ATTR_LIST(umount_discard_timeout),
#ifdef CONFIG_F2FS_IOSTAT
ATTR_LIST(iostat_enable),
ATTR_LIST(iostat_period_ms),
#endif
ATTR_LIST(readdir_ra),
ATTR_LIST(max_io_bytes),
ATTR_LIST(gc_pin_file_thresh),
ATTR_LIST(extension_list),
#ifdef CONFIG_F2FS_FAULT_INJECTION
ATTR_LIST(inject_rate),
ATTR_LIST(inject_type),
#endif
ATTR_LIST(data_io_flag),
ATTR_LIST(node_io_flag),
ATTR_LIST(ckpt_thread_ioprio),
ATTR_LIST(dirty_segments),
ATTR_LIST(free_segments),
ATTR_LIST(ovp_segments),
ATTR_LIST(unusable),
ATTR_LIST(lifetime_write_kbytes),
ATTR_LIST(features),
ATTR_LIST(reserved_blocks),
ATTR_LIST(current_reserved_blocks),
ATTR_LIST(encoding),
ATTR_LIST(mounted_time_sec),
#ifdef CONFIG_F2FS_STAT_FS
ATTR_LIST(cp_foreground_calls),
ATTR_LIST(cp_background_calls),
ATTR_LIST(gc_foreground_calls),
ATTR_LIST(gc_background_calls),
ATTR_LIST(moved_blocks_foreground),
ATTR_LIST(moved_blocks_background),
ATTR_LIST(avg_vblocks),
#endif
#ifdef CONFIG_F2FS_FS_COMPRESSION
ATTR_LIST(compr_written_block),
ATTR_LIST(compr_saved_block),
ATTR_LIST(compr_new_inode),
#endif
/* For ATGC */
ATTR_LIST(atgc_candidate_ratio),
ATTR_LIST(atgc_candidate_count),
ATTR_LIST(atgc_age_weight),
ATTR_LIST(atgc_age_threshold),
ATTR_LIST(seq_file_ra_mul),
ATTR_LIST(gc_segment_mode),
ATTR_LIST(gc_reclaimed_segments),
NULL,
};
ATTRIBUTE_GROUPS(f2fs);
static struct attribute *f2fs_feat_attrs[] = {
#ifdef CONFIG_FS_ENCRYPTION
ATTR_LIST(encryption),
ATTR_LIST(test_dummy_encryption_v2),
#ifdef CONFIG_UNICODE
ATTR_LIST(encrypted_casefold),
#endif
#endif /* CONFIG_FS_ENCRYPTION */
#ifdef CONFIG_BLK_DEV_ZONED
ATTR_LIST(block_zoned),
#endif
ATTR_LIST(atomic_write),
ATTR_LIST(extra_attr),
ATTR_LIST(project_quota),
ATTR_LIST(inode_checksum),
ATTR_LIST(flexible_inline_xattr),
ATTR_LIST(quota_ino),
ATTR_LIST(inode_crtime),
ATTR_LIST(lost_found),
#ifdef CONFIG_FS_VERITY
ATTR_LIST(verity),
#endif
ATTR_LIST(sb_checksum),
#ifdef CONFIG_UNICODE
ATTR_LIST(casefold),
#endif
ATTR_LIST(readonly),
#ifdef CONFIG_F2FS_FS_COMPRESSION
ATTR_LIST(compression),
#endif
ATTR_LIST(pin_file),
NULL,
};
ATTRIBUTE_GROUPS(f2fs_feat);
F2FS_GENERAL_RO_ATTR(sb_status);
static struct attribute *f2fs_stat_attrs[] = {
ATTR_LIST(sb_status),
NULL,
};
ATTRIBUTE_GROUPS(f2fs_stat);
F2FS_SB_FEATURE_RO_ATTR(encryption, ENCRYPT);
F2FS_SB_FEATURE_RO_ATTR(block_zoned, BLKZONED);
F2FS_SB_FEATURE_RO_ATTR(extra_attr, EXTRA_ATTR);
F2FS_SB_FEATURE_RO_ATTR(project_quota, PRJQUOTA);
F2FS_SB_FEATURE_RO_ATTR(inode_checksum, INODE_CHKSUM);
F2FS_SB_FEATURE_RO_ATTR(flexible_inline_xattr, FLEXIBLE_INLINE_XATTR);
F2FS_SB_FEATURE_RO_ATTR(quota_ino, QUOTA_INO);
F2FS_SB_FEATURE_RO_ATTR(inode_crtime, INODE_CRTIME);
F2FS_SB_FEATURE_RO_ATTR(lost_found, LOST_FOUND);
F2FS_SB_FEATURE_RO_ATTR(verity, VERITY);
F2FS_SB_FEATURE_RO_ATTR(sb_checksum, SB_CHKSUM);
F2FS_SB_FEATURE_RO_ATTR(casefold, CASEFOLD);
F2FS_SB_FEATURE_RO_ATTR(compression, COMPRESSION);
F2FS_SB_FEATURE_RO_ATTR(readonly, RO);
static struct attribute *f2fs_sb_feat_attrs[] = {
ATTR_LIST(sb_encryption),
ATTR_LIST(sb_block_zoned),
ATTR_LIST(sb_extra_attr),
ATTR_LIST(sb_project_quota),
ATTR_LIST(sb_inode_checksum),
ATTR_LIST(sb_flexible_inline_xattr),
ATTR_LIST(sb_quota_ino),
ATTR_LIST(sb_inode_crtime),
ATTR_LIST(sb_lost_found),
ATTR_LIST(sb_verity),
ATTR_LIST(sb_sb_checksum),
ATTR_LIST(sb_casefold),
ATTR_LIST(sb_compression),
ATTR_LIST(sb_readonly),
NULL,
};
ATTRIBUTE_GROUPS(f2fs_sb_feat);
static const struct sysfs_ops f2fs_attr_ops = {
.show = f2fs_attr_show,
.store = f2fs_attr_store,
};
static struct kobj_type f2fs_sb_ktype = {
.default_groups = f2fs_groups,
.sysfs_ops = &f2fs_attr_ops,
.release = f2fs_sb_release,
};
static struct kobj_type f2fs_ktype = {
.sysfs_ops = &f2fs_attr_ops,
};
static struct kset f2fs_kset = {
.kobj = {.ktype = &f2fs_ktype},
};
static struct kobj_type f2fs_feat_ktype = {
.default_groups = f2fs_feat_groups,
.sysfs_ops = &f2fs_attr_ops,
};
static struct kobject f2fs_feat = {
.kset = &f2fs_kset,
};
static ssize_t f2fs_stat_attr_show(struct kobject *kobj,
struct attribute *attr, char *buf)
{
struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
s_stat_kobj);
struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
return a->show ? a->show(a, sbi, buf) : 0;
}
static ssize_t f2fs_stat_attr_store(struct kobject *kobj, struct attribute *attr,
const char *buf, size_t len)
{
struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
s_stat_kobj);
struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
return a->store ? a->store(a, sbi, buf, len) : 0;
}
static void f2fs_stat_kobj_release(struct kobject *kobj)
{
struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
s_stat_kobj);
complete(&sbi->s_stat_kobj_unregister);
}
static const struct sysfs_ops f2fs_stat_attr_ops = {
.show = f2fs_stat_attr_show,
.store = f2fs_stat_attr_store,
};
static struct kobj_type f2fs_stat_ktype = {
.default_groups = f2fs_stat_groups,
.sysfs_ops = &f2fs_stat_attr_ops,
.release = f2fs_stat_kobj_release,
};
static ssize_t f2fs_sb_feat_attr_show(struct kobject *kobj,
struct attribute *attr, char *buf)
{
struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
s_feature_list_kobj);
struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
return a->show ? a->show(a, sbi, buf) : 0;
}
static void f2fs_feature_list_kobj_release(struct kobject *kobj)
{
struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
s_feature_list_kobj);
complete(&sbi->s_feature_list_kobj_unregister);
}
static const struct sysfs_ops f2fs_feature_list_attr_ops = {
.show = f2fs_sb_feat_attr_show,
};
static struct kobj_type f2fs_feature_list_ktype = {
.default_groups = f2fs_sb_feat_groups,
.sysfs_ops = &f2fs_feature_list_attr_ops,
.release = f2fs_feature_list_kobj_release,
};
static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
void *offset)
{
struct super_block *sb = seq->private;
struct f2fs_sb_info *sbi = F2FS_SB(sb);
unsigned int total_segs =
le32_to_cpu(sbi->raw_super->segment_count_main);
int i;
seq_puts(seq, "format: segment_type|valid_blocks\n"
"segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
for (i = 0; i < total_segs; i++) {
struct seg_entry *se = get_seg_entry(sbi, i);
if ((i % 10) == 0)
seq_printf(seq, "%-10d", i);
seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
if ((i % 10) == 9 || i == (total_segs - 1))
seq_putc(seq, '\n');
else
seq_putc(seq, ' ');
}
return 0;
}
static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
void *offset)
{
struct super_block *sb = seq->private;
struct f2fs_sb_info *sbi = F2FS_SB(sb);
unsigned int total_segs =
le32_to_cpu(sbi->raw_super->segment_count_main);
int i, j;
seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
"segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
for (i = 0; i < total_segs; i++) {
struct seg_entry *se = get_seg_entry(sbi, i);
seq_printf(seq, "%-10d", i);
seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
seq_printf(seq, " %.2x", se->cur_valid_map[j]);
seq_putc(seq, '\n');
}
return 0;
}
static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
void *offset)
{
struct super_block *sb = seq->private;
struct f2fs_sb_info *sbi = F2FS_SB(sb);
struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
int i;
seq_puts(seq, "format: victim_secmap bitmaps\n");
for (i = 0; i < MAIN_SECS(sbi); i++) {
if ((i % 10) == 0)
seq_printf(seq, "%-10d", i);
seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
seq_putc(seq, '\n');
else
seq_putc(seq, ' ');
}
return 0;
}
int __init f2fs_init_sysfs(void)
{
int ret;
kobject_set_name(&f2fs_kset.kobj, "f2fs");
f2fs_kset.kobj.parent = fs_kobj;
ret = kset_register(&f2fs_kset);
if (ret)
return ret;
ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
NULL, "features");
if (ret) {
kobject_put(&f2fs_feat);
kset_unregister(&f2fs_kset);
} else {
f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
}
return ret;
}
void f2fs_exit_sysfs(void)
{
kobject_put(&f2fs_feat);
kset_unregister(&f2fs_kset);
remove_proc_entry("fs/f2fs", NULL);
f2fs_proc_root = NULL;
}
int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
{
struct super_block *sb = sbi->sb;
int err;
sbi->s_kobj.kset = &f2fs_kset;
init_completion(&sbi->s_kobj_unregister);
err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
"%s", sb->s_id);
if (err)
goto put_sb_kobj;
sbi->s_stat_kobj.kset = &f2fs_kset;
init_completion(&sbi->s_stat_kobj_unregister);
err = kobject_init_and_add(&sbi->s_stat_kobj, &f2fs_stat_ktype,
&sbi->s_kobj, "stat");
if (err)
goto put_stat_kobj;
sbi->s_feature_list_kobj.kset = &f2fs_kset;
init_completion(&sbi->s_feature_list_kobj_unregister);
err = kobject_init_and_add(&sbi->s_feature_list_kobj,
&f2fs_feature_list_ktype,
&sbi->s_kobj, "feature_list");
if (err)
goto put_feature_list_kobj;
if (f2fs_proc_root)
sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
if (sbi->s_proc) {
proc_create_single_data("segment_info", 0444, sbi->s_proc,
segment_info_seq_show, sb);
proc_create_single_data("segment_bits", 0444, sbi->s_proc,
segment_bits_seq_show, sb);
#ifdef CONFIG_F2FS_IOSTAT
proc_create_single_data("iostat_info", 0444, sbi->s_proc,
iostat_info_seq_show, sb);
#endif
proc_create_single_data("victim_bits", 0444, sbi->s_proc,
victim_bits_seq_show, sb);
}
return 0;
put_feature_list_kobj:
kobject_put(&sbi->s_feature_list_kobj);
wait_for_completion(&sbi->s_feature_list_kobj_unregister);
put_stat_kobj:
kobject_put(&sbi->s_stat_kobj);
wait_for_completion(&sbi->s_stat_kobj_unregister);
put_sb_kobj:
kobject_put(&sbi->s_kobj);
wait_for_completion(&sbi->s_kobj_unregister);
return err;
}
void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
{
if (sbi->s_proc) {
#ifdef CONFIG_F2FS_IOSTAT
remove_proc_entry("iostat_info", sbi->s_proc);
#endif
remove_proc_entry("segment_info", sbi->s_proc);
remove_proc_entry("segment_bits", sbi->s_proc);
remove_proc_entry("victim_bits", sbi->s_proc);
remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
}
kobject_del(&sbi->s_stat_kobj);
kobject_put(&sbi->s_stat_kobj);
wait_for_completion(&sbi->s_stat_kobj_unregister);
kobject_del(&sbi->s_feature_list_kobj);
kobject_put(&sbi->s_feature_list_kobj);
wait_for_completion(&sbi->s_feature_list_kobj_unregister);
kobject_del(&sbi->s_kobj);
kobject_put(&sbi->s_kobj);
wait_for_completion(&sbi->s_kobj_unregister);
}