| commit | a5d16333612718569ffd26064270e535cb9c3928 | [log] [tgz] |
|---|---|---|
| author | Li Zefan <lizf@cn.fujitsu.com> | Wed Dec 07 20:08:40 2011 -0500 |
| committer | Chris Mason <chris.mason@oracle.com> | Thu Dec 08 08:55:46 2011 -0500 |
| tree | 8c91371ea5f77630ce3683bf4971bd3e6012cd0c | |
| parent | 274bd4fb3ed6b72c1d77ef8850511f09fc6b8e4d [diff] |
Btrfs: check if the to-be-added device is writable If we call ioctl(BTRFS_IOC_ADD_DEV) directly, we'll succeed in adding a readonly device to a btrfs filesystem, and btrfs will write to that device, emitting kernel errors: [ 3109.833692] lost page write due to I/O error on loop2 [ 3109.833720] lost page write due to I/O error on loop2 ... Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>