[XFS] propogate return codes from flush routines

This patch handles error return values in fs_flush_pages and
fs_flushinval_pages. It changes the prototype of fs_flushinval_pages so we
can propogate the errors and handle them at higher layers. I also modified
xfs_itruncate_start so that it could propogate the error further.

SGI-PV: 961990
SGI-Modid: xfs-linux-melb:xfs-kern:28231a

Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Stewart Smith <stewart@flamingspork.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

1 files changed, 14 insertions, 7 deletions

diff --git a/fs/xfs/linux-2.6/xfs_fs_subr.c b/fs/xfs/linux-2.6/xfs_fs_subr.c
index dc0562828e76..2eb87cd082af 100644
--- a/fs/xfs/linux-2.6/xfs_fs_subr.c
+++ b/fs/xfs/linux-2.6/xfs_fs_subr.c
@@ -35,7 +35,7 @@ fs_tosspages(
                 truncate_inode_pages(ip->i_mapping, first);
 }
 
-void
+int
 fs_flushinval_pages(
         bhv_desc_t      *bdp,
         xfs_off_t       first,
@@ -44,13 +44,16 @@ fs_flushinval_pages(
 {
         bhv_vnode_t     *vp = BHV_TO_VNODE(bdp);
         struct inode    *ip = vn_to_inode(vp);
+        int             ret = 0;
 
         if (VN_CACHED(vp)) {
                 if (VN_TRUNC(vp))
                         VUNTRUNCATE(vp);
-                filemap_write_and_wait(ip->i_mapping);
-                truncate_inode_pages(ip->i_mapping, first);
+                ret = filemap_write_and_wait(ip->i_mapping);
+                if (!ret)
+                        truncate_inode_pages(ip->i_mapping, first);
         }
+        return ret;
 }
 
 int
@@ -63,14 +66,18 @@ fs_flush_pages(
 {
         bhv_vnode_t     *vp = BHV_TO_VNODE(bdp);
         struct inode    *ip = vn_to_inode(vp);
+        int             ret = 0;
+        int             ret2;
 
         if (VN_DIRTY(vp)) {
                 if (VN_TRUNC(vp))
                         VUNTRUNCATE(vp);
-                filemap_fdatawrite(ip->i_mapping);
+                ret = filemap_fdatawrite(ip->i_mapping);
                 if (flags & XFS_B_ASYNC)
-                        return 0;
-                filemap_fdatawait(ip->i_mapping);
+                        return ret;
+                ret2 = filemap_fdatawait(ip->i_mapping);
+                if (!ret)
+                        ret = ret2;
         }
-        return 0;
+        return ret;
 }