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git.openfabrics.org - ~emulex/infiniband.git/commit
Btrfs: Fix the problem that the replace destroys the seed filesystem
The seed filesystem was destroyed by the device replace, the reproduce
method is:
# mkfs.btrfs -f <dev0>
# btrfstune -S 1 <dev0>
# mount <dev0> <mnt>
# btrfs device add <dev1> <mnt>
# umount <mnt>
# mount <dev1> <mnt>
# btrfs replace start -f <dev0> <dev2> <mnt>
# umount <mnt>
# mount <dev0> <mnt>
It is because we erase the super block on the seed device. It is wrong,
we should not change anything on the seed device.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>