diff options
| author | Sage Weil <sage@newdream.net> | 2010-12-10 01:36:28 +0100 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2010-12-10 22:29:10 +0100 |
| commit | 75eaa0e22c055e38982df267d0f84cc510ba38bf (patch) | |
| tree | 073828ec809c95dbae9368b7f83a3734dad82b45 /fs/btrfs | |
| parent | Btrfs: Fix page leak in compressed writeback path (diff) | |
| download | linux-75eaa0e22c055e38982df267d0f84cc510ba38bf.tar.xz linux-75eaa0e22c055e38982df267d0f84cc510ba38bf.zip | |
Btrfs: fix sync subvol/snapshot creation
We were incorrectly taking the async path even for the sync ioctls by
passing in &transid unconditionally.
There's ample room for further cleanup here, but this keeps the fix simple.
Signed-off-by: Sage Weil <sage@newdream.net>
Reviewed-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to '')
| -rw-r--r-- | fs/btrfs/ioctl.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index f1c9bb4079ed..7cc2e8e075b4 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -964,6 +964,15 @@ static noinline int btrfs_ioctl_snap_create(struct file *file, name = async_vol_args->name; fd = async_vol_args->fd; async_vol_args->name[BTRFS_SNAPSHOT_NAME_MAX] = '\0'; + + ret = btrfs_ioctl_snap_create_transid(file, name, fd, + subvol, &transid); + + if (ret == 0 && + copy_to_user(arg + + offsetof(struct btrfs_ioctl_async_vol_args, + transid), &transid, sizeof(transid))) + ret = -EFAULT; } else { vol_args = memdup_user(arg, sizeof(*vol_args)); if (IS_ERR(vol_args)) @@ -971,16 +980,9 @@ static noinline int btrfs_ioctl_snap_create(struct file *file, name = vol_args->name; fd = vol_args->fd; vol_args->name[BTRFS_PATH_NAME_MAX] = '\0'; - } - ret = btrfs_ioctl_snap_create_transid(file, name, fd, - subvol, &transid); - - if (!ret && async) { - if (copy_to_user(arg + - offsetof(struct btrfs_ioctl_async_vol_args, - transid), &transid, sizeof(transid))) - return -EFAULT; + ret = btrfs_ioctl_snap_create_transid(file, name, fd, + subvol, NULL); } kfree(vol_args); |