luck/tmp_suning_uos_patched
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[GFS2] Fix locking for Direct I/O reads

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We need to hold i_mutex when doing direct i/o reads.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Steven Whitehouse 2006-07-05 08:24:34 -04:00
parent b0dd9308b7
commit faac9bd0e3
1 changed files with 7 additions and 3 deletions
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6
fs/gfs2/ops_address.c
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@ -642,6 +642,7 @@ static ssize_t gfs2_direct_IO(int rw, struct kiocb *iocb,
struct inode *inode = file->f_mapping->host;
struct gfs2_inode *ip = GFS2_I(inode);
struct gfs2_sbd *sdp = GFS2_SB(inode);
int ret;
if (rw == WRITE)
return gfs2_direct_IO_write(iocb, iov, offset, nr_segs);
@ -650,9 +651,12 @@ static ssize_t gfs2_direct_IO(int rw, struct kiocb *iocb,
gfs2_assert_warn(sdp, !gfs2_is_stuffed(ip)))
return -EINVAL;
return __blockdev_direct_IO(READ, iocb, inode, inode->i_sb->s_bdev, iov,
mutex_lock(&inode->i_mutex);
ret = __blockdev_direct_IO(READ, iocb, inode, inode->i_sb->s_bdev, iov,
offset, nr_segs, gfs2_get_block, NULL,
DIO_OWN_LOCKING);
mutex_unlock(&inode->i_mutex);
return ret;
}
const struct address_space_operations gfs2_file_aops = {