[Ocfs2-devel] [PATCH 5/6] Btrfs: fail if we try to use hole punch

Josef Bacik josef at redhat.com
Mon Nov 15 09:14:54 PST 2010


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 <josef at redhat.com>
---
 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..6f08892 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




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