[XFS] split up xlog_recover_process_iunlinks

Split out the body of the main loop into a separate helper to make the
code readable.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Niv Sardi <xaiki@sgi.com>

1 files changed, 66 insertions, 68 deletions

diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 4099618f5fa0..841398d24211 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -3147,6 +3147,70 @@ out_error:
         return;
 }
 
+STATIC xfs_agino_t
+xlog_recover_process_one_iunlink(
+        struct xfs_mount                *mp,
+        xfs_agnumber_t                  agno,
+        xfs_agino_t                     agino,
+        int                             bucket)
+{
+        struct xfs_buf                  *ibp;
+        struct xfs_dinode               *dip;
+        struct xfs_inode                *ip;
+        xfs_ino_t                       ino;
+        int                             error;
+
+        ino = XFS_AGINO_TO_INO(mp, agno, agino);
+        error = xfs_iget(mp, NULL, ino, 0, 0, &ip, 0);
+        if (error)
+                goto fail;
+
+        /*
+         * Get the on disk inode to find the next inode in the bucket.
+         */
+        ASSERT(ip != NULL);
+        error = xfs_itobp(mp, NULL, ip, &dip, &ibp, 0, 0, XFS_BUF_LOCK);
+        if (error)
+                goto fail;
+
+        ASSERT(dip != NULL);
+        ASSERT(ip->i_d.di_nlink == 0);
+
+        /* setup for the next pass */
+        agino = be32_to_cpu(dip->di_next_unlinked);
+        xfs_buf_relse(ibp);
+
+        /*
+         * Prevent any DMAPI event from being sent when the reference on
+         * the inode is dropped.
+         */
+        ip->i_d.di_dmevmask = 0;
+
+        /*
+         * If this is a new inode, handle it specially.  Otherwise, just
+         * drop our reference to the inode.  If there are no other
+         * references, this will send the inode to xfs_inactive() which
+         * will truncate the file and free the inode.
+         */
+        if (ip->i_d.di_mode == 0)
+                xfs_iput_new(ip, 0);
+        else
+                IRELE(ip);
+        return agino;
+
+ fail:
+        /*
+         * We can't read in the inode this bucket points to, or this inode
+         * is messed up.  Just ditch this bucket of inodes.  We will lose
+         * some inodes and space, but at least we won't hang.
+         *
+         * Call xlog_recover_clear_agi_bucket() to perform a transaction to
+         * clear the inode pointer in the bucket.
+         */
+        xlog_recover_clear_agi_bucket(mp, agno, bucket);
+        return NULLAGINO;
+}
+
 /*
  * xlog_iunlink_recover
  *
@@ -3167,11 +3231,7 @@ xlog_recover_process_iunlinks(
         xfs_agnumber_t  agno;
         xfs_agi_t       *agi;
         xfs_buf_t       *agibp;
-        xfs_buf_t       *ibp;
-        xfs_dinode_t    *dip;
-        xfs_inode_t     *ip;
         xfs_agino_t     agino;
-        xfs_ino_t       ino;
         int             bucket;
         int             error;
         uint            mp_dmevmask;
@@ -3201,10 +3261,8 @@ xlog_recover_process_iunlinks(
                 agi = XFS_BUF_TO_AGI(agibp);
 
                 for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) {
-
                         agino = be32_to_cpu(agi->agi_unlinked[bucket]);
                         while (agino != NULLAGINO) {
-
                                 /*
                                  * Release the agi buffer so that it can
                                  * be acquired in the normal course of the
@@ -3212,68 +3270,8 @@ xlog_recover_process_iunlinks(
                                  */
                                 xfs_buf_relse(agibp);
 
-                                ino = XFS_AGINO_TO_INO(mp, agno, agino);
-                                error = xfs_iget(mp, NULL, ino, 0, 0, &ip, 0);
-                                ASSERT(error || (ip != NULL));
-
-                                if (!error) {
-                                        /*
-                                         * Get the on disk inode to find the
-                                         * next inode in the bucket.
-                                         */
-                                        error = xfs_itobp(mp, NULL, ip, &dip,
-                                                        &ibp, 0, 0,
-                                                        XFS_BUF_LOCK);
-                                        ASSERT(error || (dip != NULL));
-                                }
-
-                                if (!error) {
-                                        ASSERT(ip->i_d.di_nlink == 0);
-
-                                        /* setup for the next pass */
-                                        agino = be32_to_cpu(
-                                                        dip->di_next_unlinked);
-                                        xfs_buf_relse(ibp);
-                                        /*
-                                         * Prevent any DMAPI event from
-                                         * being sent when the
-                                         * reference on the inode is
-                                         * dropped.
-                                         */
-                                        ip->i_d.di_dmevmask = 0;
-
-                                        /*
-                                         * If this is a new inode, handle
-                                         * it specially.  Otherwise,
-                                         * just drop our reference to the
-                                         * inode.  If there are no
-                                         * other references, this will
-                                         * send the inode to
-                                         * xfs_inactive() which will
-                                         * truncate the file and free
-                                         * the inode.
-                                         */
-                                        if (ip->i_d.di_mode == 0)
-                                                xfs_iput_new(ip, 0);
-                                        else
-                                                IRELE(ip);
-                                } else {
-                                        /*
-                                         * We can't read in the inode
-                                         * this bucket points to, or
-                                         * this inode is messed up.  Just
-                                         * ditch this bucket of inodes.  We
-                                         * will lose some inodes and space,
-                                         * but at least we won't hang.  Call
-                                         * xlog_recover_clear_agi_bucket()
-                                         * to perform a transaction to clear
-                                         * the inode pointer in the bucket.
-                                         */
-                                        xlog_recover_clear_agi_bucket(mp, agno,
-                                                        bucket);
-
-                                        agino = NULLAGINO;
-                                }
+                                agino = xlog_recover_process_one_iunlink(mp,
+                                                        agno, agino, bucket);
 
                                 /*
                                  * Reacquire the agibuffer and continue around