Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2025-01-01 02:36:02 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

f2fs: support errors=remount-ro|continue|panic mountoption

Browse Source 
This patch supports errors=remount-ro|continue|panic mount option
for f2fs.

f2fs behaves as below in three different modes:
mode			continue	remount-ro	panic
access ops		normal		noraml		N/A
syscall errors		-EIO		-EROFS		N/A
mount option		rw		ro		N/A
pending dir write	keep		keep		N/A
pending non-dir write	drop		keep		N/A
pending node write	drop		keep		N/A
pending meta write	keep		keep		N/A

By default it uses "continue" mode.

[Yangtao helps to clean up function's name]
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2023-04-23 23:49:15 +08:00 committed by Jaegeuk Kim
parent ac9a78681b
commit b62e71be21
8 changed files with 167 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
Documentation/filesystems/f2fs.rst
View File

@ -351,6 +351,22 @@ age_extent_cache Enable an age extent cache based on rb-tree. It records
data block update frequency of the extent per inode, in
order to provide better temperature hints for data block
allocation.
errors=%s Specify f2fs behavior on critical errors. This supports modes:
"panic", "continue" and "remount-ro", respectively, trigger
panic immediately, continue without doing anything, and remount
the partition in read-only mode. By default it uses "continue"
mode.
====================== =============== =============== ========
mode continue remount-ro panic
====================== =============== =============== ========
access ops normal noraml N/A
syscall errors -EIO -EROFS N/A
mount option rw ro N/A
pending dir write keep keep N/A
pending non-dir write drop keep N/A
pending node write drop keep N/A
pending meta write keep keep N/A
====================== =============== =============== ========
======================== ============================================================
Debugfs Entries

7
fs/f2fs/checkpoint.c
View File

@ -30,12 +30,9 @@ void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi, bool end_io,
unsigned char reason)
{
f2fs_build_fault_attr(sbi, 0, 0);
set_ckpt_flags(sbi, CP_ERROR_FLAG);
if (!end_io) {
if (!end_io)
f2fs_flush_merged_writes(sbi);
f2fs_handle_stop(sbi, reason);
}
f2fs_handle_critical_error(sbi, reason, end_io);
}
/*

4
fs/f2fs/data.c
View File

@ -2807,6 +2807,10 @@ int f2fs_write_single_data_page(struct page *page, int *submitted,
if (S_ISDIR(inode->i_mode) &&
!is_sbi_flag_set(sbi, SBI_IS_CLOSE))
goto redirty_out;
/* keep data pages in remount-ro mode */
if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_READONLY)
goto redirty_out;
goto out;
}

20
fs/f2fs/f2fs.h
View File

@ -162,6 +162,7 @@ struct f2fs_mount_info {
int fs_mode; /* fs mode: LFS or ADAPTIVE */
int bggc_mode; /* bggc mode: off, on or sync */
int memory_mode; /* memory mode */
int errors; /* errors parameter */
int discard_unit; /*
* discard command's offset/size should
* be aligned to this unit: block,
@ -1370,6 +1371,12 @@ enum {
MEMORY_MODE_LOW, /* memory mode for low memry devices */
};
enum errors_option {
MOUNT_ERRORS_READONLY, /* remount fs ro on errors */
MOUNT_ERRORS_CONTINUE, /* continue on errors */
MOUNT_ERRORS_PANIC, /* panic on errors */
};
static inline int f2fs_test_bit(unsigned int nr, char *addr);
static inline void f2fs_set_bit(unsigned int nr, char *addr);
static inline void f2fs_clear_bit(unsigned int nr, char *addr);
@ -1721,8 +1728,14 @@ struct f2fs_sb_info {
struct workqueue_struct *post_read_wq; /* post read workqueue */
unsigned char errors[MAX_F2FS_ERRORS]; /* error flags */
spinlock_t error_lock; /* protect errors array */
/*
* If we are in irq context, let's update error information into
* on-disk superblock in the work.
*/
struct work_struct s_error_work;
unsigned char errors[MAX_F2FS_ERRORS]; /* error flags */
unsigned char stop_reason[MAX_STOP_REASON]; /* stop reason */
spinlock_t error_lock; /* protect errors/stop_reason array */
bool error_dirty; /* errors of sb is dirty */
struct kmem_cache *inline_xattr_slab; /* inline xattr entry */
@ -3541,8 +3554,9 @@ int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly);
int f2fs_quota_sync(struct super_block *sb, int type);
loff_t max_file_blocks(struct inode *inode);
void f2fs_quota_off_umount(struct super_block *sb);
void f2fs_handle_stop(struct f2fs_sb_info *sbi, unsigned char reason);
void f2fs_save_errors(struct f2fs_sb_info *sbi, unsigned char flag);
void f2fs_handle_critical_error(struct f2fs_sb_info *sbi, unsigned char reason,
bool irq_context);
void f2fs_handle_error(struct f2fs_sb_info *sbi, unsigned char error);
int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover);
int f2fs_sync_fs(struct super_block *sb, int sync);

5
fs/f2fs/file.c
View File

@ -2225,7 +2225,6 @@ static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
ret = 0;
f2fs_stop_checkpoint(sbi, false,
STOP_CP_REASON_SHUTDOWN);
set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
trace_f2fs_shutdown(sbi, in, ret);
}
return ret;
@ -2238,7 +2237,6 @@ static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
if (ret)
goto out;
f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN);
set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
thaw_bdev(sb->s_bdev);
break;
case F2FS_GOING_DOWN_METASYNC:
@ -2247,16 +2245,13 @@ static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
if (ret)
goto out;
f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN);
set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
break;
case F2FS_GOING_DOWN_NOSYNC:
f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN);
set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
break;
case F2FS_GOING_DOWN_METAFLUSH:
f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_META_IO);
f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN);
set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
break;
case F2FS_GOING_DOWN_NEED_FSCK:
set_sbi_flag(sbi, SBI_NEED_FSCK);

2
fs/f2fs/gc.c
View File

@ -59,7 +59,7 @@ static int gc_thread_func(void *data)
if (gc_th->gc_wake)
gc_th->gc_wake = false;
if (try_to_freeze()) {
if (try_to_freeze() || f2fs_readonly(sbi->sb)) {
stat_other_skip_bggc_count(sbi);
continue;
}

3
fs/f2fs/node.c
View File

@ -1596,6 +1596,9 @@ static int __write_node_page(struct page *page, bool atomic, bool *submitted,
trace_f2fs_writepage(page, NODE);
if (unlikely(f2fs_cp_error(sbi))) {
/* keep node pages in remount-ro mode */
if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_READONLY)
goto redirty_out;
ClearPageUptodate(page);
dec_page_count(sbi, F2FS_DIRTY_NODES);
unlock_page(page);

134
fs/f2fs/super.c
View File

@ -164,6 +164,7 @@ enum {
Opt_discard_unit,
Opt_memory_mode,
Opt_age_extent_cache,
Opt_errors,
Opt_err,
};
@ -243,6 +244,7 @@ static match_table_t f2fs_tokens = {
{Opt_discard_unit, "discard_unit=%s"},
{Opt_memory_mode, "memory=%s"},
{Opt_age_extent_cache, "age_extent_cache"},
{Opt_errors, "errors=%s"},
{Opt_err, NULL},
};
@ -1268,6 +1270,25 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount)
case Opt_age_extent_cache:
set_opt(sbi, AGE_EXTENT_CACHE);
break;
case Opt_errors:
name = match_strdup(&args[0]);
if (!name)
return -ENOMEM;
if (!strcmp(name, "remount-ro")) {
F2FS_OPTION(sbi).errors =
MOUNT_ERRORS_READONLY;
} else if (!strcmp(name, "continue")) {
F2FS_OPTION(sbi).errors =
MOUNT_ERRORS_CONTINUE;
} else if (!strcmp(name, "panic")) {
F2FS_OPTION(sbi).errors =
MOUNT_ERRORS_PANIC;
} else {
kfree(name);
return -EINVAL;
}
kfree(name);
break;
default:
f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
p);
@ -1622,6 +1643,9 @@ static void f2fs_put_super(struct super_block *sb)
f2fs_destroy_node_manager(sbi);
f2fs_destroy_segment_manager(sbi);
/* flush s_error_work before sbi destroy */
flush_work(&sbi->s_error_work);
f2fs_destroy_post_read_wq(sbi);
kvfree(sbi->ckpt);
@ -2052,6 +2076,13 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
else if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW)
seq_printf(seq, ",memory=%s", "low");
if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_READONLY)
seq_printf(seq, ",errors=%s", "remount-ro");
else if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_CONTINUE)
seq_printf(seq, ",errors=%s", "continue");
else if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_PANIC)
seq_printf(seq, ",errors=%s", "panic");
return 0;
}
@ -2080,6 +2111,7 @@ static void default_options(struct f2fs_sb_info *sbi)
}
F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
F2FS_OPTION(sbi).memory_mode = MEMORY_MODE_NORMAL;
F2FS_OPTION(sbi).errors = MOUNT_ERRORS_CONTINUE;
sbi->sb->s_flags &= ~SB_INLINECRYPT;
@ -2281,6 +2313,9 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data)
if (err)
goto restore_opts;
/* flush outstanding errors before changing fs state */
flush_work(&sbi->s_error_work);
/*
* Previous and new state of filesystem is RO,
* so skip checking GC and FLUSH_MERGE conditions.
@ -3926,45 +3961,60 @@ int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
return err;
}
void f2fs_handle_stop(struct f2fs_sb_info *sbi, unsigned char reason)
static void save_stop_reason(struct f2fs_sb_info *sbi, unsigned char reason)
{
unsigned long flags;
spin_lock_irqsave(&sbi->error_lock, flags);
if (sbi->stop_reason[reason] < GENMASK(BITS_PER_BYTE - 1, 0))
sbi->stop_reason[reason]++;
spin_unlock_irqrestore(&sbi->error_lock, flags);
}
static void f2fs_record_stop_reason(struct f2fs_sb_info *sbi)
{
struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
unsigned long flags;
int err;
f2fs_down_write(&sbi->sb_lock);
if (raw_super->s_stop_reason[reason] < GENMASK(BITS_PER_BYTE - 1, 0))
raw_super->s_stop_reason[reason]++;
spin_lock_irqsave(&sbi->error_lock, flags);
memcpy(raw_super->s_stop_reason, sbi->stop_reason, MAX_STOP_REASON);
spin_unlock_irqrestore(&sbi->error_lock, flags);
err = f2fs_commit_super(sbi, false);
if (err)
f2fs_err(sbi, "f2fs_commit_super fails to record reason:%u err:%d",
reason, err);
f2fs_up_write(&sbi->sb_lock);
if (err)
f2fs_err(sbi, "f2fs_commit_super fails to record err:%d", err);
}
void f2fs_save_errors(struct f2fs_sb_info *sbi, unsigned char flag)
{
spin_lock(&sbi->error_lock);
unsigned long flags;
spin_lock_irqsave(&sbi->error_lock, flags);
if (!test_bit(flag, (unsigned long *)sbi->errors)) {
set_bit(flag, (unsigned long *)sbi->errors);
sbi->error_dirty = true;
}
spin_unlock(&sbi->error_lock);
spin_unlock_irqrestore(&sbi->error_lock, flags);
}
static bool f2fs_update_errors(struct f2fs_sb_info *sbi)
{
unsigned long flags;
bool need_update = false;
spin_lock(&sbi->error_lock);
spin_lock_irqsave(&sbi->error_lock, flags);
if (sbi->error_dirty) {
memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
MAX_F2FS_ERRORS);
sbi->error_dirty = false;
need_update = true;
}
spin_unlock(&sbi->error_lock);
spin_unlock_irqrestore(&sbi->error_lock, flags);
return need_update;
}
@ -3988,6 +4038,66 @@ void f2fs_handle_error(struct f2fs_sb_info *sbi, unsigned char error)
f2fs_up_write(&sbi->sb_lock);
}
static bool system_going_down(void)
{
return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF
|| system_state == SYSTEM_RESTART;
}
void f2fs_handle_critical_error(struct f2fs_sb_info *sbi, unsigned char reason,
bool irq_context)
{
struct super_block *sb = sbi->sb;
bool shutdown = reason == STOP_CP_REASON_SHUTDOWN;
bool continue_fs = !shutdown &&
F2FS_OPTION(sbi).errors == MOUNT_ERRORS_CONTINUE;
set_ckpt_flags(sbi, CP_ERROR_FLAG);
if (!f2fs_hw_is_readonly(sbi)) {
save_stop_reason(sbi, reason);
if (irq_context && !shutdown)
schedule_work(&sbi->s_error_work);
else
f2fs_record_stop_reason(sbi);
}
/*
* We force ERRORS_RO behavior when system is rebooting. Otherwise we
* could panic during 'reboot -f' as the underlying device got already
* disabled.
*/
if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_PANIC &&
!shutdown && !system_going_down() &&
!is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN))
panic("F2FS-fs (device %s): panic forced after error\n",
sb->s_id);
if (shutdown)
set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
/* continue filesystem operators if errors=continue */
if (continue_fs || f2fs_readonly(sb))
return;
f2fs_warn(sbi, "Remounting filesystem read-only");
/*
* Make sure updated value of ->s_mount_flags will be visible before
* ->s_flags update
*/
smp_wmb();
sb->s_flags |= SB_RDONLY;
}
static void f2fs_record_error_work(struct work_struct *work)
{
struct f2fs_sb_info *sbi = container_of(work,
struct f2fs_sb_info, s_error_work);
f2fs_record_stop_reason(sbi);
}
static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
{
struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
@ -4218,7 +4328,9 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_fs_info = sbi;
sbi->raw_super = raw_super;
INIT_WORK(&sbi->s_error_work, f2fs_record_error_work);
memcpy(sbi->errors, raw_super->s_errors, MAX_F2FS_ERRORS);
memcpy(sbi->stop_reason, raw_super->s_stop_reason, MAX_STOP_REASON);
/* precompute checksum seed for metadata */
if (f2fs_sb_has_inode_chksum(sbi))
@ -4615,6 +4727,8 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
f2fs_destroy_segment_manager(sbi);
stop_ckpt_thread:
f2fs_stop_ckpt_thread(sbi);
/* flush s_error_work before sbi destroy */
flush_work(&sbi->s_error_work);
f2fs_destroy_post_read_wq(sbi);
free_devices:
destroy_device_list(sbi);