From faac9bd0e3ce7cb0572ec66e0a426cacf6afa970 Mon Sep 17 00:00:00 2001 From: Steven Whitehouse Date: Wed, 5 Jul 2006 08:24:34 -0400 Subject: [GFS2] Fix locking for Direct I/O reads We need to hold i_mutex when doing direct i/o reads. Signed-off-by: Steven Whitehouse --- fs/gfs2/ops_address.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) (limited to 'fs') diff --git a/fs/gfs2/ops_address.c b/fs/gfs2/ops_address.c index 26db333..27ce301 100644 --- a/fs/gfs2/ops_address.c +++ b/fs/gfs2/ops_address.c @@ -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, - offset, nr_segs, gfs2_get_block, NULL, - DIO_OWN_LOCKING); + 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 = { -- cgit v1.1