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[PATCH 3/6] Ocfs2: handle hole punching via fallocate properly

To: david@xxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-btrfs@xxxxxxxxxxxxxxx, linux-ext4@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx, cmm@xxxxxxxxxx, cluster-devel@xxxxxxxxxx, ocfs2-devel@xxxxxxxxxxxxxx
Subject: [PATCH 3/6] Ocfs2: handle hole punching via fallocate properly
From: Josef Bacik <josef@xxxxxxxxxx>
Date: Mon, 15 Nov 2010 12:05:20 -0500
In-reply-to: <1289840723-3056-1-git-send-email-josef@xxxxxxxxxx>
References: <1289840723-3056-1-git-send-email-josef@xxxxxxxxxx>
This patch just makes ocfs2 use its UNRESERVP ioctl when we get the hole punch
flag in fallocate.  I didn't test it, but it seems simple enough.  Thanks,

Signed-off-by: Josef Bacik <josef@xxxxxxxxxx>
---
 fs/ocfs2/file.c |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 77b4c04..181ae52 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1992,6 +1992,7 @@ static long ocfs2_fallocate(struct inode *inode, int 
mode, loff_t offset,
        struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
        struct ocfs2_space_resv sr;
        int change_size = 1;
+       int cmd = OCFS2_IOC_RESVSP64;
 
        if (!ocfs2_writes_unwritten_extents(osb))
                return -EOPNOTSUPP;
@@ -2002,12 +2003,17 @@ static long ocfs2_fallocate(struct inode *inode, int 
mode, loff_t offset,
        if (mode & FALLOC_FL_KEEP_SIZE)
                change_size = 0;
 
+       if (mode & FALLOC_FL_PUNCH_HOLE) {
+               cmd = OCFS2_IOC_UNRESVSP64;
+               change_size = 0;
+       }
+
        sr.l_whence = 0;
        sr.l_start = (s64)offset;
        sr.l_len = (s64)len;
 
-       return __ocfs2_change_file_space(NULL, inode, offset,
-                                        OCFS2_IOC_RESVSP64, &sr, change_size);
+       return __ocfs2_change_file_space(NULL, inode, offset, cmd, &sr,
+                                        change_size);
 }
 
 int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos,
-- 
1.6.6.1

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