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Ext4: fail if we try to use hole punch

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Ext4 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,

Acked-by: Jan Kara <jack@suse.cz>
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 20:46:18 -05:00 committed by Al Viro
parent db47fef2cd
commit d6dc8462f4
1 changed files with 4 additions and 0 deletions
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4
fs/ext4/extents.c
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@ -3644,6 +3644,10 @@ long ext4_fallocate(struct inode *inode, int mode, loff_t offset, loff_t len)
struct ext4_map_blocks map;
unsigned int credits, blkbits = inode->i_blkbits;
/* We only support the FALLOC_FL_KEEP_SIZE mode */
if (mode && (mode != FALLOC_FL_KEEP_SIZE))
return -EOPNOTSUPP;
/*
* currently supporting (pre)allocate mode for extent-based
* files _only_