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@xxxxxxxxxxxx>
---
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 41614c3..4c2d7c4 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -970,6 +970,15 @@ 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))
@@ -977,16 +986,9 @@ 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);
--
1.6.6.1
--
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