[XFS] Prevent free space oversubscription and xfssyncd looping.

[safe/jmp/linux-2.6] / fs / xfs / xfs_fsops.c

diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index 502483c..c064e72 100644 (file)
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -24,14 +24,12 @@
 #include "xfs_trans.h"
 #include "xfs_sb.h"
 #include "xfs_ag.h"
-#include "xfs_dir.h"
 #include "xfs_dir2.h"
 #include "xfs_dmapi.h"
 #include "xfs_mount.h"
 #include "xfs_bmap_btree.h"
 #include "xfs_alloc_btree.h"
 #include "xfs_ialloc_btree.h"
-#include "xfs_dir_sf.h"
 #include "xfs_dir2_sf.h"
 #include "xfs_attr_sf.h"
 #include "xfs_dinode.h"
@@ -464,7 +462,7 @@ xfs_fs_counts(
 
        xfs_icsb_sync_counters_lazy(mp);
        s = XFS_SB_LOCK(mp);
-       cnt->freedata = mp->m_sb.sb_fdblocks;
+       cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
        cnt->freertx = mp->m_sb.sb_frextents;
        cnt->freeino = mp->m_sb.sb_ifree;
        cnt->allocino = mp->m_sb.sb_icount;
@@ -521,15 +519,19 @@ xfs_reserve_blocks(
                }
                mp->m_resblks = request;
        } else {
+               __int64_t       free;
+
+               free =  mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
                delta = request - mp->m_resblks;
-               lcounter = mp->m_sb.sb_fdblocks - delta;
+               lcounter = free - delta;
                if (lcounter < 0) {
                        /* We can't satisfy the request, just get what we can */
-                       mp->m_resblks += mp->m_sb.sb_fdblocks;
-                       mp->m_resblks_avail += mp->m_sb.sb_fdblocks;
-                       mp->m_sb.sb_fdblocks = 0;
+                       mp->m_resblks += free;
+                       mp->m_resblks_avail += free;
+                       mp->m_sb.sb_fdblocks = XFS_ALLOC_SET_ASIDE(mp);
                } else {
-                       mp->m_sb.sb_fdblocks = lcounter;
+                       mp->m_sb.sb_fdblocks =
+                               lcounter + XFS_ALLOC_SET_ASIDE(mp);
                        mp->m_resblks = request;
                        mp->m_resblks_avail += delta;
                }
@@ -542,14 +544,13 @@ xfs_reserve_blocks(
 }
 
 void
-xfs_fs_log_dummy(xfs_mount_t *mp)
+xfs_fs_log_dummy(
+       xfs_mount_t     *mp)
 {
-       xfs_trans_t *tp;
-       xfs_inode_t *ip;
-
+       xfs_trans_t     *tp;
+       xfs_inode_t     *ip;
 
        tp = _xfs_trans_alloc(mp, XFS_TRANS_DUMMY1);
-       atomic_inc(&mp->m_active_trans);
        if (xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0)) {
                xfs_trans_cancel(tp, 0);
                return;