3 files changed, 21 insertions, 43 deletions

diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index 15412fe15c3a..b552f816de15 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -852,8 +852,8 @@ xfs_convert_page(
                 SetPageUptodate(page);
 
         if (count) {
-                wbc->nr_to_write--;
-                if (wbc->nr_to_write <= 0)
+                if (--wbc->nr_to_write <= 0 &&
+                    wbc->sync_mode == WB_SYNC_NONE)
                         done = 1;
         }
         xfs_start_page_writeback(page, !page_dirty, count);
@@ -1068,7 +1068,7 @@ xfs_vm_writepage(
          * by themselves.
          */
         if ((current->flags & (PF_MEMALLOC|PF_KSWAPD)) == PF_MEMALLOC)
-                goto out_fail;
+                goto redirty;
 
         /*
          * We need a transaction if there are delalloc or unwritten buffers
@@ -1080,7 +1080,7 @@ xfs_vm_writepage(
          */
         xfs_count_page_state(page, &delalloc, &unwritten);
         if ((current->flags & PF_FSTRANS) && (delalloc || unwritten))
-                goto out_fail;
+                goto redirty;
 
         /* Is this page beyond the end of the file? */
         offset = i_size_read(inode);
@@ -1245,12 +1245,15 @@ error:
         if (iohead)
                 xfs_cancel_ioend(iohead);
 
+        if (err == -EAGAIN)
+                goto redirty;
+
         xfs_aops_discard_page(page);
         ClearPageUptodate(page);
         unlock_page(page);
         return err;
 
-out_fail:
+redirty:
         redirty_page_for_writepage(wbc, page);
         unlock_page(page);
         return 0;
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 15c35b62ff14..a4e07974955b 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -1226,6 +1226,7 @@ xfs_fs_statfs(
         struct xfs_inode        *ip = XFS_I(dentry->d_inode);
         __uint64_t              fakeinos, id;
         xfs_extlen_t            lsize;
+        __int64_t               ffree;
 
         statp->f_type = XFS_SB_MAGIC;
         statp->f_namelen = MAXNAMELEN - 1;
@@ -1249,7 +1250,11 @@ xfs_fs_statfs(
                 statp->f_files = min_t(typeof(statp->f_files),
                                         statp->f_files,
                                         mp->m_maxicount);
-        statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
+
+        /* make sure statp->f_ffree does not underflow */
+        ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
+        statp->f_ffree = max_t(__int64_t, ffree, 0);
+
         spin_unlock(&mp->m_sb_lock);
 
         if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) ||
@@ -1402,7 +1407,7 @@ xfs_fs_freeze(
 
         xfs_save_resvblks(mp);
         xfs_quiesce_attr(mp);
-        return -xfs_fs_log_dummy(mp);
+        return -xfs_fs_log_dummy(mp, SYNC_WAIT);
 }
 
 STATIC int
diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c
index dfcbd98d1599..d59c4a65d492 100644
--- a/fs/xfs/linux-2.6/xfs_sync.c
+++ b/fs/xfs/linux-2.6/xfs_sync.c
@@ -34,6 +34,7 @@
 #include "xfs_inode_item.h"
 #include "xfs_quota.h"
 #include "xfs_trace.h"
+#include "xfs_fsops.h"
 
 #include <linux/kthread.h>
 #include <linux/freezer.h>
@@ -341,38 +342,6 @@ xfs_sync_attr(
 }
 
 STATIC int
-xfs_commit_dummy_trans(
-        struct xfs_mount        *mp,
-        uint                    flags)
-{
-        struct xfs_inode        *ip = mp->m_rootip;
-        struct xfs_trans        *tp;
-        int                     error;
-
-        /*
-         * Put a dummy transaction in the log to tell recovery
-         * that all others are OK.
-         */
-        tp = xfs_trans_alloc(mp, XFS_TRANS_DUMMY1);
-        error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
-        if (error) {
-                xfs_trans_cancel(tp, 0);
-                return error;
-        }
-
-        xfs_ilock(ip, XFS_ILOCK_EXCL);
-
-        xfs_trans_ijoin(tp, ip);
-        xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
-        error = xfs_trans_commit(tp, 0);
-        xfs_iunlock(ip, XFS_ILOCK_EXCL);
-
-        /* the log force ensures this transaction is pushed to disk */
-        xfs_log_force(mp, (flags & SYNC_WAIT) ? XFS_LOG_SYNC : 0);
-        return error;
-}
-
-STATIC int
 xfs_sync_fsdata(
         struct xfs_mount        *mp)
 {
@@ -432,7 +401,7 @@ xfs_quiesce_data(
 
         /* mark the log as covered if needed */
         if (xfs_log_need_covered(mp))
-                error2 = xfs_commit_dummy_trans(mp, SYNC_WAIT);
+                error2 = xfs_fs_log_dummy(mp, SYNC_WAIT);
 
         /* flush data-only devices */
         if (mp->m_rtdev_targp)
@@ -563,7 +532,7 @@ xfs_flush_inodes(
 /*
  * Every sync period we need to unpin all items, reclaim inodes and sync
  * disk quotas.  We might need to cover the log to indicate that the
- * filesystem is idle.
+ * filesystem is idle and not frozen.
  */
 STATIC void
 xfs_sync_worker(
@@ -577,8 +546,9 @@ xfs_sync_worker(
                 xfs_reclaim_inodes(mp, 0);
                 /* dgc: errors ignored here */
                 error = xfs_qm_sync(mp, SYNC_TRYLOCK);
-                if (xfs_log_need_covered(mp))
-                        error = xfs_commit_dummy_trans(mp, 0);
+                if (mp->m_super->s_frozen == SB_UNFROZEN &&
+                    xfs_log_need_covered(mp))
+                        error = xfs_fs_log_dummy(mp, 0);
         }
         mp->m_sync_seq++;
         wake_up(&mp->m_wait_single_sync_task);