5 files changed, 44 insertions, 13 deletions

diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index c40f81ba9b13..34dcb43a7837 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -1390,11 +1390,19 @@ xfs_vm_direct_IO(
 
 	iocb->private = xfs_alloc_ioend(inode, IOMAP_UNWRITTEN);
 
-	ret = blockdev_direct_IO_own_locking(rw, iocb, inode,
-		iomap.iomap_target->bt_bdev,
-		iov, offset, nr_segs,
-		xfs_get_blocks_direct,
-		xfs_end_io_direct);
+	if (rw == WRITE) {
+		ret = blockdev_direct_IO_own_locking(rw, iocb, inode,
+			iomap.iomap_target->bt_bdev,
+			iov, offset, nr_segs,
+			xfs_get_blocks_direct,
+			xfs_end_io_direct);
+	} else {
+		ret = blockdev_direct_IO_no_locking(rw, iocb, inode,
+			iomap.iomap_target->bt_bdev,
+			iov, offset, nr_segs,
+			xfs_get_blocks_direct,
+			xfs_end_io_direct);
+	}
 
 	if (unlikely(ret <= 0 && iocb->private))
 		xfs_destroy_ioend(iocb->private);
diff --git a/fs/xfs/linux-2.6/xfs_buf.h b/fs/xfs/linux-2.6/xfs_buf.h
index ceda3a2859d2..7858703ed84c 100644
--- a/fs/xfs/linux-2.6/xfs_buf.h
+++ b/fs/xfs/linux-2.6/xfs_buf.h
@@ -246,8 +246,8 @@ extern void xfs_buf_trace(xfs_buf_t *, char *, void *, void *);
 #define BUF_BUSY		XBF_DONT_BLOCK
 
 #define XFS_BUF_BFLAGS(bp)	((bp)->b_flags)
-#define XFS_BUF_ZEROFLAGS(bp)	\
-	((bp)->b_flags &= ~(XBF_READ|XBF_WRITE|XBF_ASYNC|XBF_DELWRI))
+#define XFS_BUF_ZEROFLAGS(bp)	((bp)->b_flags &= \
+		~(XBF_READ|XBF_WRITE|XBF_ASYNC|XBF_DELWRI|XBF_ORDERED))
 
 #define XFS_BUF_STALE(bp)	((bp)->b_flags |= XFS_B_STALE)
 #define XFS_BUF_UNSTALE(bp)	((bp)->b_flags &= ~XFS_B_STALE)
diff --git a/fs/xfs/linux-2.6/xfs_linux.h b/fs/xfs/linux-2.6/xfs_linux.h
index 8c021dc57d1f..a13f75c1a936 100644
--- a/fs/xfs/linux-2.6/xfs_linux.h
+++ b/fs/xfs/linux-2.6/xfs_linux.h
@@ -215,7 +215,6 @@ BUFFER_FNS(PrivateStart, unwritten);
 #define MIN(a,b)	(min(a,b))
 #define MAX(a,b)	(max(a,b))
 #define howmany(x, y)	(((x)+((y)-1))/(y))
-#define roundup(x, y)	((((x)+((y)-1))/(y))*(y))
 
 /*
  * Various platform dependent calls that don't fit anywhere else
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index 5d9cfd91ad08..ee788b1cb364 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -264,7 +264,9 @@ xfs_read(
 					dmflags, &locktype);
 		if (ret) {
 			xfs_iunlock(ip, XFS_IOLOCK_SHARED);
-			goto unlock_mutex;
+			if (unlikely(ioflags & IO_ISDIRECT))
+				mutex_unlock(&inode->i_mutex);
+			return ret;
 		}
 	}
 
@@ -272,6 +274,9 @@ xfs_read(
 		bhv_vop_flushinval_pages(vp, ctooff(offtoct(*offset)),
 						-1, FI_REMAPF_LOCKED);
 
+	if (unlikely(ioflags & IO_ISDIRECT))
+		mutex_unlock(&inode->i_mutex);
+
 	xfs_rw_enter_trace(XFS_READ_ENTER, &ip->i_iocore,
 				(void *)iovp, segs, *offset, ioflags);
 	ret = __generic_file_aio_read(iocb, iovp, segs, offset);
@@ -281,10 +286,6 @@ xfs_read(
 		XFS_STATS_ADD(xs_read_bytes, ret);
 
 	xfs_iunlock(ip, XFS_IOLOCK_SHARED);
-
-unlock_mutex:
-	if (unlikely(ioflags & IO_ISDIRECT))
-		mutex_unlock(&inode->i_mutex);
 	return ret;
 }
 
@@ -390,6 +391,8 @@ xfs_splice_write(
 	xfs_inode_t		*ip = XFS_BHVTOI(bdp);
 	xfs_mount_t		*mp = ip->i_mount;
 	ssize_t			ret;
+	struct inode		*inode = outfilp->f_mapping->host;
+	xfs_fsize_t		isize;
 
 	XFS_STATS_INC(xs_write_calls);
 	if (XFS_FORCED_SHUTDOWN(ip->i_mount))
@@ -416,6 +419,20 @@ xfs_splice_write(
 	if (ret > 0)
 		XFS_STATS_ADD(xs_write_bytes, ret);
 
+	isize = i_size_read(inode);
+	if (unlikely(ret < 0 && ret != -EFAULT && *ppos > isize))
+		*ppos = isize;
+
+	if (*ppos > ip->i_d.di_size) {
+		xfs_ilock(ip, XFS_ILOCK_EXCL);
+		if (*ppos > ip->i_d.di_size) {
+			ip->i_d.di_size = *ppos;
+			i_size_write(inode, *ppos);
+			ip->i_update_core = 1;
+			ip->i_update_size = 1;
+		}
+		xfs_iunlock(ip, XFS_ILOCK_EXCL);
+	}
 	xfs_iunlock(ip, XFS_IOLOCK_EXCL);
 	return ret;
 }
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 9bdef9d51900..4754f342a5d3 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -314,6 +314,13 @@ xfs_mountfs_check_barriers(xfs_mount_t *mp)
 		return;
 	}
 
+	if (xfs_readonly_buftarg(mp->m_ddev_targp)) {
+		xfs_fs_cmn_err(CE_NOTE, mp,
+		  "Disabling barriers, underlying device is readonly");
+		mp->m_flags &= ~XFS_MOUNT_BARRIER;
+		return;
+	}
+
 	error = xfs_barrier_test(mp);
 	if (error) {
 		xfs_fs_cmn_err(CE_NOTE, mp,