From: Josef Bacik Subject: [PATCH 5/6] Btrfs: fail if we try to use hole punch Date: Mon, 8 Nov 2010 15:32:06 -0500 Message-ID: <1289248327-16308-5-git-send-email-josef@redhat.com> References: <1289248327-16308-1-git-send-email-josef@redhat.com> To: linux-kernel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, xfs@oss.sgi.com, joel.becker@oracle.com, cmm@us.ibm.com, cluster- Return-path: In-Reply-To: <1289248327-16308-1-git-send-email-josef@redhat.com> Sender: linux-btrfs-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org Btrfs doesn't have the ability to punch holes yet, so make sure we return EOPNOTSUPP if we try to use hole punching through fallocate. This support can be added later. Thanks, Signed-off-by: Josef Bacik --- fs/btrfs/inode.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 78877d7..c590add 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -6936,6 +6936,10 @@ static long btrfs_fallocate(struct inode *inode, int mode, alloc_start = offset & ~mask; alloc_end = (offset + len + mask) & ~mask; + /* We only support the FALLOC_FL_KEEP_SIZE mode */ + if (mode && (mode & FALLOC_FL_KEEP_SIZE)) + return -EOPNOTSUPP; + /* * wait for ordered IO before we have any locks. We'll loop again * below with the locks held. -- 1.6.6.1