From: Christian Borntraeger <borntraeger@de.ibm.com>
Date: Sat, 15 May 2010 04:00:00 +0000 (-0400)
Subject: ext4: allow defrag (EXT4_IOC_MOVE_EXT) in 32bit compat mode
X-Git-Tag: v2.6.35-rc1~39^2~34
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b684b2ee9409f2890a8b3aea98525bbe5f84e276;p=pandora-kernel.git

ext4: allow defrag (EXT4_IOC_MOVE_EXT) in 32bit compat mode

I have an x86_64 kernel with i386 userspace. e4defrag fails on the
EXT4_IOC_MOVE_EXT ioctl because it is not wired up for the compat
case. It seems that struct move_extent is compat save, only types
with fixed widths are used:
{
        __u32 reserved;         /* should be zero */
        __u32 donor_fd;         /* donor file descriptor */
        __u64 orig_start;       /* logical start offset in block for orig */
        __u64 donor_start;      /* logical start offset in block for donor */
        __u64 len;              /* block length to be moved */
        __u64 moved_len;        /* moved block length */
};

Lets just wire up EXT4_IOC_MOVE_EXT for the compat case.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
CC: Akira Fujita <a-fujita@rs.jp.nec.com>
---

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