diff options
Diffstat (limited to 'fs/btrfs/qgroup.c')
| -rw-r--r-- | fs/btrfs/qgroup.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index b53d2e7b938d..2272419ade7e 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -1013,16 +1013,22 @@ out_add_root: btrfs_abort_transaction(trans, ret); goto out_free_path; } - spin_lock(&fs_info->qgroup_lock); - fs_info->quota_root = quota_root; - set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags); - spin_unlock(&fs_info->qgroup_lock); ret = btrfs_commit_transaction(trans); trans = NULL; if (ret) goto out_free_path; + /* + * Set quota enabled flag after committing the transaction, to avoid + * deadlocks on fs_info->qgroup_ioctl_lock with concurrent snapshot + * creation. + */ + spin_lock(&fs_info->qgroup_lock); + fs_info->quota_root = quota_root; + set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags); + spin_unlock(&fs_info->qgroup_lock); + ret = qgroup_rescan_init(fs_info, 0, 1); if (!ret) { qgroup_rescan_zero_tracking(fs_info); |