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Btrfs: fail if we try to use hole punch

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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@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Josef Bacik 2010-11-17 20:46:19 -05:00 committed by Al Viro
parent d6dc8462f4
commit 23a8519b55
1 changed files with 4 additions and 0 deletions
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4
fs/btrfs/inode.c
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@ -7115,6 +7115,10 @@ 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.