xfs: reserve blocks for refcount / rmap log item recovery

During log recovery, the per-AG reservations aren't yet set up, so log
recovery has to reserve enough blocks to handle all possible btree
splits.

Reported-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>

diff --git a/fs/xfs/xfs_refcount_item.c b/fs/xfs/xfs_refcount_item.c
index 3a55d6f..7a39f40 100644 (file)
--- a/fs/xfs/xfs_refcount_item.c
+++ b/fs/xfs/xfs_refcount_item.c
@@ -23,6 +23,7 @@
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_bit.h"
+#include "xfs_shared.h"
 #include "xfs_mount.h"
 #include "xfs_defer.h"
 #include "xfs_trans.h"
@@ -456,10 +457,12 @@ xfs_cui_recover(
         * transaction.  Normally, any work that needs to be deferred
         * gets attached to the same defer_ops that scheduled the
         * refcount update.  However, we're in log recovery here, so we
-        * we create our own defer_ops and use that to finish up any
-        * work that doesn't fit.
+        * we use the passed in defer_ops and to finish up any work that
+        * doesn't fit.  We need to reserve enough blocks to handle a
+        * full btree split on either end of the refcount range.
         */
-       error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp);
+       error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate,
+                       mp->m_refc_maxlevels * 2, 0, XFS_TRANS_RESERVE, &tp);
        if (error)
                return error;
        cudp = xfs_trans_get_cud(tp, cuip);

diff --git a/fs/xfs/xfs_rmap_item.c b/fs/xfs/xfs_rmap_item.c
index f3b139c..49d3124 100644 (file)
--- a/fs/xfs/xfs_rmap_item.c
+++ b/fs/xfs/xfs_rmap_item.c
@@ -23,6 +23,7 @@
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_bit.h"
+#include "xfs_shared.h"
 #include "xfs_mount.h"
 #include "xfs_defer.h"
 #include "xfs_trans.h"
@@ -470,7 +471,8 @@ xfs_rui_recover(
                }
        }
 
-       error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp);
+       error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate,
+                       mp->m_rmap_maxlevels, 0, XFS_TRANS_RESERVE, &tp);
        if (error)
                return error;
        rudp = xfs_trans_get_rud(tp, ruip);