From: Christian Brauner <christian.brauner@xxxxxxxxxx> Setting flags on subvolumes or snapshots are core features of btrfs. The BTRFS_IOC_SUBVOL_SETFLAGS ioctl is especially important as it allows to make subvolumes and snapshots read-only or read-write. Allow setting flags on btrfs subvolumes and snapshots on idmapped mounts. This is a fairly straightforward operation since all the permission checking helpers are already capable of handling idmapped mounts. So we just need to pass down the mount's userns. Cc: Chris Mason <clm@xxxxxx> Cc: Josef Bacik <josef@xxxxxxxxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx> Cc: David Sterba <dsterba@xxxxxxxx> Cc: linux-btrfs@xxxxxxxxxxxxxxx Signed-off-by: Christian Brauner <christian.brauner@xxxxxxxxxx> --- fs/btrfs/ioctl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 9e6c9dfae981..8c1ca9f05f4f 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -1981,7 +1981,7 @@ static noinline int btrfs_ioctl_subvol_setflags(struct file *file, u64 flags; int ret = 0; - if (!inode_owner_or_capable(&init_user_ns, inode)) + if (!inode_owner_or_capable(file_mnt_user_ns(file), inode)) return -EPERM; ret = mnt_want_write_file(file); -- 2.30.2
