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| author | Baokun Li <libaokun1@huawei.com> | 2025-01-22 14:41:25 +0300 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2025-03-13 17:16:34 +0300 |
| commit | f3054e53c2f367bd3cf6535afe9ab13198d2d739 (patch) | |
| tree | 59de17d65da4dbf04a25f4c9fdf688d70544fa8f | |
| parent | 99708f8a9d30081a71638d6f4e216350a4340cc3 (diff) | |
| download | linux-f3054e53c2f367bd3cf6535afe9ab13198d2d739.tar.xz | |
ext4: add EXT4_FLAGS_EMERGENCY_RO bit
EXT4_FLAGS_EMERGENCY_RO Indicates that the current file system has become
read-only due to some error. Compared to SB_RDONLY, setting it does not
require a lock because we won't clear it, which avoids over-coupling with
vfs freeze. Also, add a helper function ext4_emergency_ro() to check if
the bit is set.
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Zhang Yi <yi.zhang@huawei.com>
Link: https://patch.msgid.link/20250122114130.229709-3-libaokun@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| -rw-r--r-- | fs/ext4/ext4.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 8f6bfa25fa6f..81cb16b5f8da 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -2239,6 +2239,7 @@ enum { EXT4_FLAGS_RESIZING, /* Avoid superblock update and resize race */ EXT4_FLAGS_SHUTDOWN, /* Prevent access to the file system */ EXT4_FLAGS_BDEV_IS_DAX, /* Current block device support DAX */ + EXT4_FLAGS_EMERGENCY_RO,/* Emergency read-only due to fs errors */ }; static inline int ext4_forced_shutdown(struct super_block *sb) @@ -2246,6 +2247,11 @@ static inline int ext4_forced_shutdown(struct super_block *sb) return test_bit(EXT4_FLAGS_SHUTDOWN, &EXT4_SB(sb)->s_ext4_flags); } +static inline int ext4_emergency_ro(struct super_block *sb) +{ + return test_bit(EXT4_FLAGS_EMERGENCY_RO, &EXT4_SB(sb)->s_ext4_flags); +} + /* * Default values for user and/or group using reserved blocks */ |