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    Subject[PATCH 4/6] Ext4: fail if we try to use hole punch
    Date
    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>
    ---
    fs/ext4/extents.c | 4 ++++
    1 files changed, 4 insertions(+), 0 deletions(-)

    diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
    index 0554c48..35bca73 100644
    --- a/fs/ext4/extents.c
    +++ b/fs/ext4/extents.c
    @@ -3622,6 +3622,10 @@ 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_
    --
    1.6.6.1


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