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| author | Wang Shilong <wangsl.fnst@cn.fujitsu.com> | 2014-05-13 17:05:06 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-06-30 20:09:46 -0700 |
| commit | 2d857bc05efe3654da84dec0a1199e8ec4bf6e22 (patch) | |
| tree | 259cf3038b882b5cf3c39bc620dd337542932ad7 /init | |
| parent | 372fad07b99cc6a9959bfe6b8f46135970c52a21 (diff) | |
| download | linux-3.10-2d857bc05efe3654da84dec0a1199e8ec4bf6e22.tar.gz linux-3.10-2d857bc05efe3654da84dec0a1199e8ec4bf6e22.tar.bz2 linux-3.10-2d857bc05efe3654da84dec0a1199e8ec4bf6e22.zip | |
Btrfs: set right total device count for seeding support
commit 298658414a2f0bea1f05a81876a45c1cd96aa2e0 upstream.
Seeding device support allows us to create a new filesystem
based on existed filesystem.
However newly created filesystem's @total_devices should include seed
devices. This patch fix the following problem:
# mkfs.btrfs -f /dev/sdb
# btrfstune -S 1 /dev/sdb
# mount /dev/sdb /mnt
# btrfs device add -f /dev/sdc /mnt --->fs_devices->total_devices = 1
# umount /mnt
# mount /dev/sdc /mnt --->fs_devices->total_devices = 2
This is because we record right @total_devices in superblock, but
@fs_devices->total_devices is reset to be 0 in btrfs_prepare_sprout().
Fix this problem by not resetting @fs_devices->total_devices.
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions