[XFS] move xfssyncd code to xfs_sync.c

Move all the xfssyncd code to the new xfs_sync.c file. This places it
closer to the actual code that it interacts with, rather than just being
associated with high level VFS code.

SGI-PV: 988139

SGI-Modid: xfs-linux-melb:xfs-kern:32283a

Signed-off-by: David Chinner <david@fromorbit.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>

1 files changed, 56 insertions, 0 deletions

diff --git a/fs/xfs/linux-2.6/xfs_sync.h b/fs/xfs/linux-2.6/xfs_sync.h
index f4c3b1ea64c0..3746d153ec8e 100644
--- a/fs/xfs/linux-2.6/xfs_sync.h
+++ b/fs/xfs/linux-2.6/xfs_sync.h
@@ -1,7 +1,63 @@
+/*
+ * Copyright (c) 2000-2006 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
 #ifndef XFS_SYNC_H
 #define XFS_SYNC_H 1
 
+struct xfs_mount;
+
+typedef struct bhv_vfs_sync_work {
+        struct list_head        w_list;
+        struct xfs_mount        *w_mount;
+        void                    *w_data;        /* syncer routine argument */
+        void                    (*w_syncer)(struct xfs_mount *, void *);
+} bhv_vfs_sync_work_t;
+
+#define SYNC_ATTR               0x0001  /* sync attributes */
+#define SYNC_CLOSE              0x0002  /* close file system down */
+#define SYNC_DELWRI             0x0004  /* look at delayed writes */
+#define SYNC_WAIT               0x0008  /* wait for i/o to complete */
+#define SYNC_BDFLUSH            0x0010  /* BDFLUSH is calling -- don't block */
+#define SYNC_FSDATA             0x0020  /* flush fs data (e.g. superblocks) */
+#define SYNC_REFCACHE           0x0040  /* prune some of the nfs ref cache */
+#define SYNC_REMOUNT            0x0080  /* remount readonly, no dummy LRs */
+#define SYNC_IOWAIT             0x0100  /* wait for all I/O to complete */
+
+/*
+ * When remounting a filesystem read-only or freezing the filesystem,
+ * we have two phases to execute. This first phase is syncing the data
+ * before we quiesce the fielsystem, and the second is flushing all the
+ * inodes out after we've waited for all the transactions created by
+ * the first phase to complete. The second phase uses SYNC_INODE_QUIESCE
+ * to ensure that the inodes are written to their location on disk
+ * rather than just existing in transactions in the log. This means
+ * after a quiesce there is no log replay required to write the inodes
+ * to disk (this is the main difference between a sync and a quiesce).
+ */
+#define SYNC_DATA_QUIESCE       (SYNC_DELWRI|SYNC_FSDATA|SYNC_WAIT|SYNC_IOWAIT)
+#define SYNC_INODE_QUIESCE      (SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT)
+
+int xfs_syncd_init(struct xfs_mount *mp);
+void xfs_syncd_stop(struct xfs_mount *mp);
+
 int xfs_sync(struct xfs_mount *mp, int flags);
 int xfs_syncsub(struct xfs_mount *mp, int flags, int *bypassed);
 
+void xfs_flush_inode(struct xfs_inode *ip);
+void xfs_flush_device(struct xfs_inode *ip);
+
 #endif