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| author | Anand Jain <anand.jain@oracle.com> | 2018-11-11 22:22:18 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2018-12-17 14:51:34 +0100 |
| commit | 05c49e6bc1e8866ecfd674ebeeb58cdbff9145c2 (patch) | |
| tree | 99df505a980404508a8e38c69f3b22e9214aed92 /fs/btrfs/dev-replace.c | |
| parent | 0d228ece59a35a9b9e8ff0d40653234a6d90f61e (diff) | |
| download | linux-05c49e6bc1e8866ecfd674ebeeb58cdbff9145c2.tar.gz linux-05c49e6bc1e8866ecfd674ebeeb58cdbff9145c2.tar.bz2 linux-05c49e6bc1e8866ecfd674ebeeb58cdbff9145c2.zip | |
btrfs: dev-replace: go back to suspend state if another EXCL_OP is running
In a secnario where balance and replace co-exists as below,
- start balance
- pause balance
- start replace
- reboot
and when system restarts, balance resumes first. Then the replace is
attempted to restart but will fail as the EXCL_OP lock is already held
by the balance. If so place the replace state back to
BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED state.
Fixes: 010a47bde9420 ("btrfs: add proper safety check before resuming dev-replace")
CC: stable@vger.kernel.org # 4.18+
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/dev-replace.c')
| -rw-r--r-- | fs/btrfs/dev-replace.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c index 11df8f778b63..33d07c426c59 100644 --- a/fs/btrfs/dev-replace.c +++ b/fs/btrfs/dev-replace.c @@ -903,6 +903,10 @@ int btrfs_resume_dev_replace_async(struct btrfs_fs_info *fs_info) * dev-replace to start anyway. */ if (test_and_set_bit(BTRFS_FS_EXCL_OP, &fs_info->flags)) { + btrfs_dev_replace_write_lock(dev_replace); + dev_replace->replace_state = + BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED; + btrfs_dev_replace_write_unlock(dev_replace); btrfs_info(fs_info, "cannot resume dev-replace, other exclusive operation running"); return 0; |