xfs: factor out debug checks from xfs_dialloc and xfs_difree

Factor out a common helper from repeated debug checks in xfs_dialloc and
xfs_difree.

[hch: split out from Dave's dynamic allocation policy patches]

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alex Elder <aelder@sgi.com>
Signed-off-by: Felix Blyakher <felixb@sgi.com>

diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c
index 8819cda..18bf6ee 100644 (file)
--- a/fs/xfs/xfs_ialloc.c
+++ b/fs/xfs/xfs_ialloc.c
@@ -148,6 +148,47 @@ xfs_inobt_get_rec(
 }
 
 /*
+ * Verify that the number of free inodes in the AGI is correct.
+ */
+#ifdef DEBUG
+STATIC int
+xfs_check_agi_freecount(
+       struct xfs_btree_cur    *cur,
+       struct xfs_agi          *agi)
+{
+       if (cur->bc_nlevels == 1) {
+               xfs_inobt_rec_incore_t rec;
+               int             freecount = 0;
+               int             error;
+               int             i;
+
+               error = xfs_inobt_lookup_ge(cur, 0, 0, 0, &i);
+               if (error)
+                       return error;
+
+               do {
+                       error = xfs_inobt_get_rec(cur, &rec, &i);
+                       if (error)
+                               return error;
+
+                       if (i) {
+                               freecount += rec.ir_freecount;
+                               error = xfs_btree_increment(cur, 0, &i);
+                               if (error)
+                                       return error;
+                       }
+               } while (i == 1);
+
+               if (!XFS_FORCED_SHUTDOWN(cur->bc_mp))
+                       ASSERT(freecount == be32_to_cpu(agi->agi_freecount));
+       }
+       return 0;
+}
+#else
+#define xfs_check_agi_freecount(cur, agi)      0
+#endif
+
+/*
  * Initialise a new set of inodes.
  */
 STATIC void
@@ -548,6 +589,7 @@ nextag:
        }
 }
 
+
 /*
  * Visible inode allocation functions.
  */
@@ -733,27 +775,11 @@ nextag:
         */
        if (!pagino)
                pagino = be32_to_cpu(agi->agi_newino);
-#ifdef DEBUG
-       if (cur->bc_nlevels == 1) {
-               int     freecount = 0;
 
-               if ((error = xfs_inobt_lookup_ge(cur, 0, 0, 0, &i)))
-                       goto error0;
-               XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
-               do {
-                       error = xfs_inobt_get_rec(cur, &rec, &i);
-                       if (error)
-                               goto error0;
-                       XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
-                       freecount += rec.ir_freecount;
-                       if ((error = xfs_btree_increment(cur, 0, &i)))
-                               goto error0;
-               } while (i == 1);
+       error = xfs_check_agi_freecount(cur, agi);
+       if (error)
+               goto error0;
 
-               ASSERT(freecount == be32_to_cpu(agi->agi_freecount) ||
-                      XFS_FORCED_SHUTDOWN(mp));
-       }
-#endif
        /*
         * If in the same a.g. as the parent, try to get near the parent.
         */
@@ -951,25 +977,11 @@ nextag:
        down_read(&mp->m_peraglock);
        mp->m_perag[tagno].pagi_freecount--;
        up_read(&mp->m_peraglock);
-#ifdef DEBUG
-       if (cur->bc_nlevels == 1) {
-               int     freecount = 0;
 
-               if ((error = xfs_inobt_lookup_ge(cur, 0, 0, 0, &i)))
-                       goto error0;
-               do {
-                       error = xfs_inobt_get_rec(cur, &rec, &i);
-                       if (error)
-                               goto error0;
-                       XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
-                       freecount += rec.ir_freecount;
-                       if ((error = xfs_btree_increment(cur, 0, &i)))
-                               goto error0;
-               } while (i == 1);
-               ASSERT(freecount == be32_to_cpu(agi->agi_freecount) ||
-                      XFS_FORCED_SHUTDOWN(mp));
-       }
-#endif
+       error = xfs_check_agi_freecount(cur, agi);
+       if (error)
+               goto error0;
+
        xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
        xfs_trans_mod_sb(tp, XFS_TRANS_SB_IFREE, -1);
        *inop = ino;
@@ -1060,26 +1072,11 @@ xfs_difree(
         * Initialize the cursor.
         */
        cur = xfs_inobt_init_cursor(mp, tp, agbp, agno);
-#ifdef DEBUG
-       if (cur->bc_nlevels == 1) {
-               int freecount = 0;
 
-               if ((error = xfs_inobt_lookup_ge(cur, 0, 0, 0, &i)))
-                       goto error0;
-               do {
-                       error = xfs_inobt_get_rec(cur, &rec, &i);
-                       if (error)
-                               goto error0;
-                       if (i) {
-                               freecount += rec.ir_freecount;
-                               if ((error = xfs_btree_increment(cur, 0, &i)))
-                                       goto error0;
-                       }
-               } while (i == 1);
-               ASSERT(freecount == be32_to_cpu(agi->agi_freecount) ||
-                      XFS_FORCED_SHUTDOWN(mp));
-       }
-#endif
+       error = xfs_check_agi_freecount(cur, agi);
+       if (error)
+               goto error0;
+
        /*
         * Look for the entry describing this inode.
         */
@@ -1165,26 +1162,10 @@ xfs_difree(
                xfs_trans_mod_sb(tp, XFS_TRANS_SB_IFREE, 1);
        }
 
-#ifdef DEBUG
-       if (cur->bc_nlevels == 1) {
-               int freecount = 0;
+       error = xfs_check_agi_freecount(cur, agi);
+       if (error)
+               goto error0;
 
-               if ((error = xfs_inobt_lookup_ge(cur, 0, 0, 0, &i)))
-                       goto error0;
-               do {
-                       error = xfs_inobt_get_rec(cur, &rec, &i);
-                       if (error)
-                               goto error0;
-                       if (i) {
-                               freecount += rec.ir_freecount;
-                               if ((error = xfs_btree_increment(cur, 0, &i)))
-                                       goto error0;
-                       }
-               } while (i == 1);
-               ASSERT(freecount == be32_to_cpu(agi->agi_freecount) ||
-                      XFS_FORCED_SHUTDOWN(mp));
-       }
-#endif
        xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
        return 0;