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| author | Yongqiang Yang <xiaoqiangnk@gmail.com> | 2011-07-27 03:39:09 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2011-07-27 03:39:09 +0200 |
| commit | ce723c31b58f54fb865036805475ee7a8c5dc173 (patch) | |
| tree | d84f2de76ce1acc4072ce512636d686046066ee6 /fs/ext4 | |
| parent | ext4: prevent parallel resizers by atomic bit ops (diff) | |
| download | linux-ce723c31b58f54fb865036805475ee7a8c5dc173.tar.xz linux-ce723c31b58f54fb865036805475ee7a8c5dc173.zip | |
ext4: prevent a fs with errors from being resized
A filesystem with errors is not allowed to being resized, otherwise,
it is easy to destroy the filesystem.
Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/resize.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c index 0213f631271f..53d979541b31 100644 --- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -23,6 +23,16 @@ int ext4_resize_begin(struct super_block *sb) if (!capable(CAP_SYS_RESOURCE)) return -EPERM; + /* + * We are not allowed to do online-resizing on a filesystem mounted + * with error, because it can destroy the filesystem easily. + */ + if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { + ext4_warning(sb, "There are errors in the filesystem, " + "so online resizing is not allowed\n"); + return -EPERM; + } + if (test_and_set_bit_lock(EXT4_RESIZING, &EXT4_SB(sb)->s_resize_flags)) ret = -EBUSY; |