forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
603 lines
16 KiB
603 lines
16 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* linux/fs/ext4/sysfs.c |
|
* |
|
* Copyright (C) 1992, 1993, 1994, 1995 |
|
* Remy Card ([email protected]) |
|
* Theodore Ts'o ([email protected]) |
|
* |
|
*/ |
|
|
|
#include <linux/time.h> |
|
#include <linux/fs.h> |
|
#include <linux/seq_file.h> |
|
#include <linux/slab.h> |
|
#include <linux/proc_fs.h> |
|
#include <linux/part_stat.h> |
|
|
|
#include "ext4.h" |
|
#include "ext4_jbd2.h" |
|
|
|
typedef enum { |
|
attr_noop, |
|
attr_delayed_allocation_blocks, |
|
attr_session_write_kbytes, |
|
attr_lifetime_write_kbytes, |
|
attr_reserved_clusters, |
|
attr_sra_exceeded_retry_limit, |
|
attr_inode_readahead, |
|
attr_trigger_test_error, |
|
attr_first_error_time, |
|
attr_last_error_time, |
|
attr_feature, |
|
attr_pointer_ui, |
|
attr_pointer_ul, |
|
attr_pointer_u64, |
|
attr_pointer_u8, |
|
attr_pointer_string, |
|
attr_pointer_atomic, |
|
attr_journal_task, |
|
} attr_id_t; |
|
|
|
typedef enum { |
|
ptr_explicit, |
|
ptr_ext4_sb_info_offset, |
|
ptr_ext4_super_block_offset, |
|
} attr_ptr_t; |
|
|
|
static const char proc_dirname[] = "fs/ext4"; |
|
static struct proc_dir_entry *ext4_proc_root; |
|
|
|
struct ext4_attr { |
|
struct attribute attr; |
|
short attr_id; |
|
short attr_ptr; |
|
unsigned short attr_size; |
|
union { |
|
int offset; |
|
void *explicit_ptr; |
|
} u; |
|
}; |
|
|
|
static ssize_t session_write_kbytes_show(struct ext4_sb_info *sbi, char *buf) |
|
{ |
|
struct super_block *sb = sbi->s_buddy_cache->i_sb; |
|
|
|
return sysfs_emit(buf, "%lu\n", |
|
(part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - |
|
sbi->s_sectors_written_start) >> 1); |
|
} |
|
|
|
static ssize_t lifetime_write_kbytes_show(struct ext4_sb_info *sbi, char *buf) |
|
{ |
|
struct super_block *sb = sbi->s_buddy_cache->i_sb; |
|
|
|
return sysfs_emit(buf, "%llu\n", |
|
(unsigned long long)(sbi->s_kbytes_written + |
|
((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - |
|
EXT4_SB(sb)->s_sectors_written_start) >> 1))); |
|
} |
|
|
|
static ssize_t inode_readahead_blks_store(struct ext4_sb_info *sbi, |
|
const char *buf, size_t count) |
|
{ |
|
unsigned long t; |
|
int ret; |
|
|
|
ret = kstrtoul(skip_spaces(buf), 0, &t); |
|
if (ret) |
|
return ret; |
|
|
|
if (t && (!is_power_of_2(t) || t > 0x40000000)) |
|
return -EINVAL; |
|
|
|
sbi->s_inode_readahead_blks = t; |
|
return count; |
|
} |
|
|
|
static ssize_t reserved_clusters_store(struct ext4_sb_info *sbi, |
|
const char *buf, size_t count) |
|
{ |
|
unsigned long long val; |
|
ext4_fsblk_t clusters = (ext4_blocks_count(sbi->s_es) >> |
|
sbi->s_cluster_bits); |
|
int ret; |
|
|
|
ret = kstrtoull(skip_spaces(buf), 0, &val); |
|
if (ret || val >= clusters) |
|
return -EINVAL; |
|
|
|
atomic64_set(&sbi->s_resv_clusters, val); |
|
return count; |
|
} |
|
|
|
static ssize_t trigger_test_error(struct ext4_sb_info *sbi, |
|
const char *buf, size_t count) |
|
{ |
|
int len = count; |
|
|
|
if (!capable(CAP_SYS_ADMIN)) |
|
return -EPERM; |
|
|
|
if (len && buf[len-1] == '\n') |
|
len--; |
|
|
|
if (len) |
|
ext4_error(sbi->s_sb, "%.*s", len, buf); |
|
return count; |
|
} |
|
|
|
static ssize_t journal_task_show(struct ext4_sb_info *sbi, char *buf) |
|
{ |
|
if (!sbi->s_journal) |
|
return sysfs_emit(buf, "<none>\n"); |
|
return sysfs_emit(buf, "%d\n", |
|
task_pid_vnr(sbi->s_journal->j_task)); |
|
} |
|
|
|
#define EXT4_ATTR(_name,_mode,_id) \ |
|
static struct ext4_attr ext4_attr_##_name = { \ |
|
.attr = {.name = __stringify(_name), .mode = _mode }, \ |
|
.attr_id = attr_##_id, \ |
|
} |
|
|
|
#define EXT4_ATTR_FUNC(_name,_mode) EXT4_ATTR(_name,_mode,_name) |
|
|
|
#define EXT4_ATTR_FEATURE(_name) EXT4_ATTR(_name, 0444, feature) |
|
|
|
#define EXT4_ATTR_OFFSET(_name,_mode,_id,_struct,_elname) \ |
|
static struct ext4_attr ext4_attr_##_name = { \ |
|
.attr = {.name = __stringify(_name), .mode = _mode }, \ |
|
.attr_id = attr_##_id, \ |
|
.attr_ptr = ptr_##_struct##_offset, \ |
|
.u = { \ |
|
.offset = offsetof(struct _struct, _elname),\ |
|
}, \ |
|
} |
|
|
|
#define EXT4_ATTR_STRING(_name,_mode,_size,_struct,_elname) \ |
|
static struct ext4_attr ext4_attr_##_name = { \ |
|
.attr = {.name = __stringify(_name), .mode = _mode }, \ |
|
.attr_id = attr_pointer_string, \ |
|
.attr_size = _size, \ |
|
.attr_ptr = ptr_##_struct##_offset, \ |
|
.u = { \ |
|
.offset = offsetof(struct _struct, _elname),\ |
|
}, \ |
|
} |
|
|
|
#define EXT4_RO_ATTR_ES_UI(_name,_elname) \ |
|
EXT4_ATTR_OFFSET(_name, 0444, pointer_ui, ext4_super_block, _elname) |
|
|
|
#define EXT4_RO_ATTR_ES_U8(_name,_elname) \ |
|
EXT4_ATTR_OFFSET(_name, 0444, pointer_u8, ext4_super_block, _elname) |
|
|
|
#define EXT4_RO_ATTR_ES_U64(_name,_elname) \ |
|
EXT4_ATTR_OFFSET(_name, 0444, pointer_u64, ext4_super_block, _elname) |
|
|
|
#define EXT4_RO_ATTR_ES_STRING(_name,_elname,_size) \ |
|
EXT4_ATTR_STRING(_name, 0444, _size, ext4_super_block, _elname) |
|
|
|
#define EXT4_RW_ATTR_SBI_UI(_name,_elname) \ |
|
EXT4_ATTR_OFFSET(_name, 0644, pointer_ui, ext4_sb_info, _elname) |
|
|
|
#define EXT4_RW_ATTR_SBI_UL(_name,_elname) \ |
|
EXT4_ATTR_OFFSET(_name, 0644, pointer_ul, ext4_sb_info, _elname) |
|
|
|
#define EXT4_RO_ATTR_SBI_ATOMIC(_name,_elname) \ |
|
EXT4_ATTR_OFFSET(_name, 0444, pointer_atomic, ext4_sb_info, _elname) |
|
|
|
#define EXT4_ATTR_PTR(_name,_mode,_id,_ptr) \ |
|
static struct ext4_attr ext4_attr_##_name = { \ |
|
.attr = {.name = __stringify(_name), .mode = _mode }, \ |
|
.attr_id = attr_##_id, \ |
|
.attr_ptr = ptr_explicit, \ |
|
.u = { \ |
|
.explicit_ptr = _ptr, \ |
|
}, \ |
|
} |
|
|
|
#define ATTR_LIST(name) &ext4_attr_##name.attr |
|
|
|
EXT4_ATTR_FUNC(delayed_allocation_blocks, 0444); |
|
EXT4_ATTR_FUNC(session_write_kbytes, 0444); |
|
EXT4_ATTR_FUNC(lifetime_write_kbytes, 0444); |
|
EXT4_ATTR_FUNC(reserved_clusters, 0644); |
|
EXT4_ATTR_FUNC(sra_exceeded_retry_limit, 0444); |
|
|
|
EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, inode_readahead, |
|
ext4_sb_info, s_inode_readahead_blks); |
|
EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); |
|
EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); |
|
EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); |
|
EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); |
|
EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); |
|
EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); |
|
EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); |
|
EXT4_RW_ATTR_SBI_UI(mb_max_inode_prealloc, s_mb_max_inode_prealloc); |
|
EXT4_RW_ATTR_SBI_UI(mb_max_linear_groups, s_mb_max_linear_groups); |
|
EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); |
|
EXT4_ATTR(trigger_fs_error, 0200, trigger_test_error); |
|
EXT4_RW_ATTR_SBI_UI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval); |
|
EXT4_RW_ATTR_SBI_UI(err_ratelimit_burst, s_err_ratelimit_state.burst); |
|
EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.interval); |
|
EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst); |
|
EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval); |
|
EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst); |
|
#ifdef CONFIG_EXT4_DEBUG |
|
EXT4_RW_ATTR_SBI_UL(simulate_fail, s_simulate_fail); |
|
#endif |
|
EXT4_RO_ATTR_SBI_ATOMIC(warning_count, s_warning_count); |
|
EXT4_RO_ATTR_SBI_ATOMIC(msg_count, s_msg_count); |
|
EXT4_RO_ATTR_ES_UI(errors_count, s_error_count); |
|
EXT4_RO_ATTR_ES_U8(first_error_errcode, s_first_error_errcode); |
|
EXT4_RO_ATTR_ES_U8(last_error_errcode, s_last_error_errcode); |
|
EXT4_RO_ATTR_ES_UI(first_error_ino, s_first_error_ino); |
|
EXT4_RO_ATTR_ES_UI(last_error_ino, s_last_error_ino); |
|
EXT4_RO_ATTR_ES_U64(first_error_block, s_first_error_block); |
|
EXT4_RO_ATTR_ES_U64(last_error_block, s_last_error_block); |
|
EXT4_RO_ATTR_ES_UI(first_error_line, s_first_error_line); |
|
EXT4_RO_ATTR_ES_UI(last_error_line, s_last_error_line); |
|
EXT4_RO_ATTR_ES_STRING(first_error_func, s_first_error_func, 32); |
|
EXT4_RO_ATTR_ES_STRING(last_error_func, s_last_error_func, 32); |
|
EXT4_ATTR(first_error_time, 0444, first_error_time); |
|
EXT4_ATTR(last_error_time, 0444, last_error_time); |
|
EXT4_ATTR(journal_task, 0444, journal_task); |
|
EXT4_RW_ATTR_SBI_UI(mb_prefetch, s_mb_prefetch); |
|
EXT4_RW_ATTR_SBI_UI(mb_prefetch_limit, s_mb_prefetch_limit); |
|
EXT4_RW_ATTR_SBI_UL(last_trim_minblks, s_last_trim_minblks); |
|
|
|
static unsigned int old_bump_val = 128; |
|
EXT4_ATTR_PTR(max_writeback_mb_bump, 0444, pointer_ui, &old_bump_val); |
|
|
|
static struct attribute *ext4_attrs[] = { |
|
ATTR_LIST(delayed_allocation_blocks), |
|
ATTR_LIST(session_write_kbytes), |
|
ATTR_LIST(lifetime_write_kbytes), |
|
ATTR_LIST(reserved_clusters), |
|
ATTR_LIST(sra_exceeded_retry_limit), |
|
ATTR_LIST(inode_readahead_blks), |
|
ATTR_LIST(inode_goal), |
|
ATTR_LIST(mb_stats), |
|
ATTR_LIST(mb_max_to_scan), |
|
ATTR_LIST(mb_min_to_scan), |
|
ATTR_LIST(mb_order2_req), |
|
ATTR_LIST(mb_stream_req), |
|
ATTR_LIST(mb_group_prealloc), |
|
ATTR_LIST(mb_max_inode_prealloc), |
|
ATTR_LIST(mb_max_linear_groups), |
|
ATTR_LIST(max_writeback_mb_bump), |
|
ATTR_LIST(extent_max_zeroout_kb), |
|
ATTR_LIST(trigger_fs_error), |
|
ATTR_LIST(err_ratelimit_interval_ms), |
|
ATTR_LIST(err_ratelimit_burst), |
|
ATTR_LIST(warning_ratelimit_interval_ms), |
|
ATTR_LIST(warning_ratelimit_burst), |
|
ATTR_LIST(msg_ratelimit_interval_ms), |
|
ATTR_LIST(msg_ratelimit_burst), |
|
ATTR_LIST(errors_count), |
|
ATTR_LIST(warning_count), |
|
ATTR_LIST(msg_count), |
|
ATTR_LIST(first_error_ino), |
|
ATTR_LIST(last_error_ino), |
|
ATTR_LIST(first_error_block), |
|
ATTR_LIST(last_error_block), |
|
ATTR_LIST(first_error_line), |
|
ATTR_LIST(last_error_line), |
|
ATTR_LIST(first_error_func), |
|
ATTR_LIST(last_error_func), |
|
ATTR_LIST(first_error_errcode), |
|
ATTR_LIST(last_error_errcode), |
|
ATTR_LIST(first_error_time), |
|
ATTR_LIST(last_error_time), |
|
ATTR_LIST(journal_task), |
|
#ifdef CONFIG_EXT4_DEBUG |
|
ATTR_LIST(simulate_fail), |
|
#endif |
|
ATTR_LIST(mb_prefetch), |
|
ATTR_LIST(mb_prefetch_limit), |
|
ATTR_LIST(last_trim_minblks), |
|
NULL, |
|
}; |
|
ATTRIBUTE_GROUPS(ext4); |
|
|
|
/* Features this copy of ext4 supports */ |
|
EXT4_ATTR_FEATURE(lazy_itable_init); |
|
EXT4_ATTR_FEATURE(batched_discard); |
|
EXT4_ATTR_FEATURE(meta_bg_resize); |
|
#ifdef CONFIG_FS_ENCRYPTION |
|
EXT4_ATTR_FEATURE(encryption); |
|
EXT4_ATTR_FEATURE(test_dummy_encryption_v2); |
|
#endif |
|
#if IS_ENABLED(CONFIG_UNICODE) |
|
EXT4_ATTR_FEATURE(casefold); |
|
#endif |
|
#ifdef CONFIG_FS_VERITY |
|
EXT4_ATTR_FEATURE(verity); |
|
#endif |
|
EXT4_ATTR_FEATURE(metadata_csum_seed); |
|
EXT4_ATTR_FEATURE(fast_commit); |
|
#if IS_ENABLED(CONFIG_UNICODE) && defined(CONFIG_FS_ENCRYPTION) |
|
EXT4_ATTR_FEATURE(encrypted_casefold); |
|
#endif |
|
|
|
static struct attribute *ext4_feat_attrs[] = { |
|
ATTR_LIST(lazy_itable_init), |
|
ATTR_LIST(batched_discard), |
|
ATTR_LIST(meta_bg_resize), |
|
#ifdef CONFIG_FS_ENCRYPTION |
|
ATTR_LIST(encryption), |
|
ATTR_LIST(test_dummy_encryption_v2), |
|
#endif |
|
#if IS_ENABLED(CONFIG_UNICODE) |
|
ATTR_LIST(casefold), |
|
#endif |
|
#ifdef CONFIG_FS_VERITY |
|
ATTR_LIST(verity), |
|
#endif |
|
ATTR_LIST(metadata_csum_seed), |
|
ATTR_LIST(fast_commit), |
|
#if IS_ENABLED(CONFIG_UNICODE) && defined(CONFIG_FS_ENCRYPTION) |
|
ATTR_LIST(encrypted_casefold), |
|
#endif |
|
NULL, |
|
}; |
|
ATTRIBUTE_GROUPS(ext4_feat); |
|
|
|
static void *calc_ptr(struct ext4_attr *a, struct ext4_sb_info *sbi) |
|
{ |
|
switch (a->attr_ptr) { |
|
case ptr_explicit: |
|
return a->u.explicit_ptr; |
|
case ptr_ext4_sb_info_offset: |
|
return (void *) (((char *) sbi) + a->u.offset); |
|
case ptr_ext4_super_block_offset: |
|
return (void *) (((char *) sbi->s_es) + a->u.offset); |
|
} |
|
return NULL; |
|
} |
|
|
|
static ssize_t __print_tstamp(char *buf, __le32 lo, __u8 hi) |
|
{ |
|
return sysfs_emit(buf, "%lld\n", |
|
((time64_t)hi << 32) + le32_to_cpu(lo)); |
|
} |
|
|
|
#define print_tstamp(buf, es, tstamp) \ |
|
__print_tstamp(buf, (es)->tstamp, (es)->tstamp ## _hi) |
|
|
|
static ssize_t ext4_attr_show(struct kobject *kobj, |
|
struct attribute *attr, char *buf) |
|
{ |
|
struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, |
|
s_kobj); |
|
struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); |
|
void *ptr = calc_ptr(a, sbi); |
|
|
|
switch (a->attr_id) { |
|
case attr_delayed_allocation_blocks: |
|
return sysfs_emit(buf, "%llu\n", |
|
(s64) EXT4_C2B(sbi, |
|
percpu_counter_sum(&sbi->s_dirtyclusters_counter))); |
|
case attr_session_write_kbytes: |
|
return session_write_kbytes_show(sbi, buf); |
|
case attr_lifetime_write_kbytes: |
|
return lifetime_write_kbytes_show(sbi, buf); |
|
case attr_reserved_clusters: |
|
return sysfs_emit(buf, "%llu\n", |
|
(unsigned long long) |
|
atomic64_read(&sbi->s_resv_clusters)); |
|
case attr_sra_exceeded_retry_limit: |
|
return sysfs_emit(buf, "%llu\n", |
|
(unsigned long long) |
|
percpu_counter_sum(&sbi->s_sra_exceeded_retry_limit)); |
|
case attr_inode_readahead: |
|
case attr_pointer_ui: |
|
if (!ptr) |
|
return 0; |
|
if (a->attr_ptr == ptr_ext4_super_block_offset) |
|
return sysfs_emit(buf, "%u\n", |
|
le32_to_cpup(ptr)); |
|
else |
|
return sysfs_emit(buf, "%u\n", |
|
*((unsigned int *) ptr)); |
|
case attr_pointer_ul: |
|
if (!ptr) |
|
return 0; |
|
return sysfs_emit(buf, "%lu\n", |
|
*((unsigned long *) ptr)); |
|
case attr_pointer_u8: |
|
if (!ptr) |
|
return 0; |
|
return sysfs_emit(buf, "%u\n", |
|
*((unsigned char *) ptr)); |
|
case attr_pointer_u64: |
|
if (!ptr) |
|
return 0; |
|
if (a->attr_ptr == ptr_ext4_super_block_offset) |
|
return sysfs_emit(buf, "%llu\n", |
|
le64_to_cpup(ptr)); |
|
else |
|
return sysfs_emit(buf, "%llu\n", |
|
*((unsigned long long *) ptr)); |
|
case attr_pointer_string: |
|
if (!ptr) |
|
return 0; |
|
return sysfs_emit(buf, "%.*s\n", a->attr_size, |
|
(char *) ptr); |
|
case attr_pointer_atomic: |
|
if (!ptr) |
|
return 0; |
|
return sysfs_emit(buf, "%d\n", |
|
atomic_read((atomic_t *) ptr)); |
|
case attr_feature: |
|
return sysfs_emit(buf, "supported\n"); |
|
case attr_first_error_time: |
|
return print_tstamp(buf, sbi->s_es, s_first_error_time); |
|
case attr_last_error_time: |
|
return print_tstamp(buf, sbi->s_es, s_last_error_time); |
|
case attr_journal_task: |
|
return journal_task_show(sbi, buf); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static ssize_t ext4_attr_store(struct kobject *kobj, |
|
struct attribute *attr, |
|
const char *buf, size_t len) |
|
{ |
|
struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, |
|
s_kobj); |
|
struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); |
|
void *ptr = calc_ptr(a, sbi); |
|
unsigned long t; |
|
int ret; |
|
|
|
switch (a->attr_id) { |
|
case attr_reserved_clusters: |
|
return reserved_clusters_store(sbi, buf, len); |
|
case attr_pointer_ui: |
|
if (!ptr) |
|
return 0; |
|
ret = kstrtoul(skip_spaces(buf), 0, &t); |
|
if (ret) |
|
return ret; |
|
if (a->attr_ptr == ptr_ext4_super_block_offset) |
|
*((__le32 *) ptr) = cpu_to_le32(t); |
|
else |
|
*((unsigned int *) ptr) = t; |
|
return len; |
|
case attr_pointer_ul: |
|
if (!ptr) |
|
return 0; |
|
ret = kstrtoul(skip_spaces(buf), 0, &t); |
|
if (ret) |
|
return ret; |
|
*((unsigned long *) ptr) = t; |
|
return len; |
|
case attr_inode_readahead: |
|
return inode_readahead_blks_store(sbi, buf, len); |
|
case attr_trigger_test_error: |
|
return trigger_test_error(sbi, buf, len); |
|
} |
|
return 0; |
|
} |
|
|
|
static void ext4_sb_release(struct kobject *kobj) |
|
{ |
|
struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, |
|
s_kobj); |
|
complete(&sbi->s_kobj_unregister); |
|
} |
|
|
|
static const struct sysfs_ops ext4_attr_ops = { |
|
.show = ext4_attr_show, |
|
.store = ext4_attr_store, |
|
}; |
|
|
|
static struct kobj_type ext4_sb_ktype = { |
|
.default_groups = ext4_groups, |
|
.sysfs_ops = &ext4_attr_ops, |
|
.release = ext4_sb_release, |
|
}; |
|
|
|
static struct kobj_type ext4_feat_ktype = { |
|
.default_groups = ext4_feat_groups, |
|
.sysfs_ops = &ext4_attr_ops, |
|
.release = (void (*)(struct kobject *))kfree, |
|
}; |
|
|
|
void ext4_notify_error_sysfs(struct ext4_sb_info *sbi) |
|
{ |
|
sysfs_notify(&sbi->s_kobj, NULL, "errors_count"); |
|
} |
|
|
|
static struct kobject *ext4_root; |
|
|
|
static struct kobject *ext4_feat; |
|
|
|
int ext4_register_sysfs(struct super_block *sb) |
|
{ |
|
struct ext4_sb_info *sbi = EXT4_SB(sb); |
|
int err; |
|
|
|
init_completion(&sbi->s_kobj_unregister); |
|
err = kobject_init_and_add(&sbi->s_kobj, &ext4_sb_ktype, ext4_root, |
|
"%s", sb->s_id); |
|
if (err) { |
|
kobject_put(&sbi->s_kobj); |
|
wait_for_completion(&sbi->s_kobj_unregister); |
|
return err; |
|
} |
|
|
|
if (ext4_proc_root) |
|
sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); |
|
if (sbi->s_proc) { |
|
proc_create_single_data("options", S_IRUGO, sbi->s_proc, |
|
ext4_seq_options_show, sb); |
|
proc_create_single_data("es_shrinker_info", S_IRUGO, |
|
sbi->s_proc, ext4_seq_es_shrinker_info_show, |
|
sb); |
|
proc_create_single_data("fc_info", 0444, sbi->s_proc, |
|
ext4_fc_info_show, sb); |
|
proc_create_seq_data("mb_groups", S_IRUGO, sbi->s_proc, |
|
&ext4_mb_seq_groups_ops, sb); |
|
proc_create_single_data("mb_stats", 0444, sbi->s_proc, |
|
ext4_seq_mb_stats_show, sb); |
|
proc_create_seq_data("mb_structs_summary", 0444, sbi->s_proc, |
|
&ext4_mb_seq_structs_summary_ops, sb); |
|
} |
|
return 0; |
|
} |
|
|
|
void ext4_unregister_sysfs(struct super_block *sb) |
|
{ |
|
struct ext4_sb_info *sbi = EXT4_SB(sb); |
|
|
|
if (sbi->s_proc) |
|
remove_proc_subtree(sb->s_id, ext4_proc_root); |
|
kobject_del(&sbi->s_kobj); |
|
} |
|
|
|
int __init ext4_init_sysfs(void) |
|
{ |
|
int ret; |
|
|
|
ext4_root = kobject_create_and_add("ext4", fs_kobj); |
|
if (!ext4_root) |
|
return -ENOMEM; |
|
|
|
ext4_feat = kzalloc(sizeof(*ext4_feat), GFP_KERNEL); |
|
if (!ext4_feat) { |
|
ret = -ENOMEM; |
|
goto root_err; |
|
} |
|
|
|
ret = kobject_init_and_add(ext4_feat, &ext4_feat_ktype, |
|
ext4_root, "features"); |
|
if (ret) |
|
goto feat_err; |
|
|
|
ext4_proc_root = proc_mkdir(proc_dirname, NULL); |
|
return ret; |
|
|
|
feat_err: |
|
kobject_put(ext4_feat); |
|
ext4_feat = NULL; |
|
root_err: |
|
kobject_put(ext4_root); |
|
ext4_root = NULL; |
|
return ret; |
|
} |
|
|
|
void ext4_exit_sysfs(void) |
|
{ |
|
kobject_put(ext4_feat); |
|
ext4_feat = NULL; |
|
kobject_put(ext4_root); |
|
ext4_root = NULL; |
|
remove_proc_entry(proc_dirname, NULL); |
|
ext4_proc_root = NULL; |
|
} |
|
|
|
|