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authorLi Zefan <lizf@cn.fujitsu.com>2011-12-08 02:08:40 +0100
committerChris Mason <chris.mason@oracle.com>2011-12-08 14:55:46 +0100
commita5d16333612718569ffd26064270e535cb9c3928 (patch)
tree8c91371ea5f77630ce3683bf4971bd3e6012cd0c /Documentation/sysfs-rules.txt
parentBtrfs: try cluster but don't advance in search list (diff)
downloadlinux-a5d16333612718569ffd26064270e535cb9c3928.tar.xz
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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>
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