[XFS] make inode reclaim wait for log I/O to complete

During a forced shutdown a xfs inode can be destroyed before log I/O
involving that inode is complete. We need to wait for the inode to be
unpinned before tearing it down. Version 2 cleans up the code a bit by
relying on xfs_iflush() to do the unpinning and forced shutdown check.

SGI-PV: 981240

SGI-Modid: xfs-linux-melb:xfs-kern:31326a

Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: David Chinner <dgc@sgi.com>

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 199a36a..fcb1dcc 100644 (file)
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -3082,8 +3082,6 @@ xfs_iflush(
         * flush lock and do nothing.
         */
        if (xfs_inode_clean(ip)) {
-               ASSERT((iip != NULL) ?
-                        !(iip->ili_item.li_flags & XFS_LI_IN_AIL) : 1);
                xfs_ifunlock(ip);
                return 0;
        }

diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index b6a065e..d76565b 100644 (file)
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -3260,7 +3260,6 @@ xfs_finish_reclaim(
 {
        xfs_perag_t     *pag = xfs_get_perag(ip->i_mount, ip->i_ino);
        bhv_vnode_t     *vp = XFS_ITOV_NULL(ip);
-       int             error;
 
        if (vp && VN_BAD(vp))
                goto reclaim;
@@ -3303,29 +3302,16 @@ xfs_finish_reclaim(
                xfs_iflock(ip);
        }
 
-       if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) {
-               if (ip->i_update_core ||
-                   ((ip->i_itemp != NULL) &&
-                    (ip->i_itemp->ili_format.ilf_fields != 0))) {
-                       error = xfs_iflush(ip, sync_mode);
-                       /*
-                        * If we hit an error, typically because of filesystem
-                        * shutdown, we don't need to let vn_reclaim to know
-                        * because we're gonna reclaim the inode anyway.
-                        */
-                       if (error) {
-                               xfs_iunlock(ip, XFS_ILOCK_EXCL);
-                               goto reclaim;
-                       }
-                       xfs_iflock(ip); /* synchronize with xfs_iflush_done */
-               }
-
-               ASSERT(ip->i_update_core == 0);
-               ASSERT(ip->i_itemp == NULL ||
-                      ip->i_itemp->ili_format.ilf_fields == 0);
+       /*
+        * In the case of a forced shutdown we rely on xfs_iflush() to
+        * wait for the inode to be unpinned before returning an error.
+        */
+       if (xfs_iflush(ip, sync_mode) == 0) {
+               /* synchronize with xfs_iflush_done */
+               xfs_iflock(ip);
+               xfs_ifunlock(ip);
        }
 
-       xfs_ifunlock(ip);
        xfs_iunlock(ip, XFS_ILOCK_EXCL);
 
  reclaim: