[XFS] Ensure file size updates have been completed before writing inode to disk.

SGI-PV: 968767
SGI-Modid: xfs-linux-melb:xfs-kern:29675a

Signed-off-by: Lachlan McIlroy <[e-mail]>
Signed-off-by: David Chinner <[e-mail]>
Signed-off-by: Tim Shimmin <[e-mail]>

fs/xfs/linux-2.6/xfs_aops.c

···
 		ip->i_d.di_size = isize;
 		ip->i_update_core = 1;
 		ip->i_update_size = 1;
+		mark_inode_dirty_sync(vn_to_inode(ioend->io_vnode));
 	}
 
 	xfs_iunlock(ip, XFS_ILOCK_EXCL);

fs/xfs/linux-2.6/xfs_super.c

···
 
 	if (vp) {
 		vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
-		if (sync)
+		if (sync) {
+			filemap_fdatawait(inode->i_mapping);
 			flags |= FLUSH_SYNC;
+		}
 		error = bhv_vop_iflush(vp, flags);
 		if (error == EAGAIN)
 			error = sync? bhv_vop_iflush(vp, flags | FLUSH_LOG) : 0;

fs/xfs/xfs_vnodeops.c

···
 	if (XFS_FORCED_SHUTDOWN(ip->i_mount))
 		return XFS_ERROR(EIO);
 
+	if (flag & FSYNC_DATA)
+		filemap_fdatawait(vn_to_inode(XFS_ITOV(ip))->i_mapping);
+
 	/*
 	 * We always need to make sure that the required inode state
 	 * is safe on disk.  The vnode might be clean but because
···
 			sync_lsn = log->l_last_sync_lsn;
 			GRANT_UNLOCK(log, s);
 
-			if ((XFS_LSN_CMP(iip->ili_last_lsn, sync_lsn) <= 0))
-				return 0;
+			if ((XFS_LSN_CMP(iip->ili_last_lsn, sync_lsn) > 0)) {
+				if (flags & FLUSH_SYNC)
+					log_flags |= XFS_LOG_SYNC;
+				error = xfs_log_force(mp, iip->ili_last_lsn, log_flags);
+				if (error)
+					return error;
+			}
 
-			if (flags & FLUSH_SYNC)
-				log_flags |= XFS_LOG_SYNC;
-			return xfs_log_force(mp, iip->ili_last_lsn, log_flags);
+			if (ip->i_update_core == 0)
+				return 0;
 		}
 	}
 
···
 	 */
 	if (flags & FLUSH_INODE) {
 		int	flush_flags;
-
-		if (xfs_ipincount(ip))
-			return EAGAIN;
 
 		if (flags & FLUSH_SYNC) {
 			xfs_ilock(ip, XFS_ILOCK_SHARED);