sysv: add ->sync_fs

Add a ->sync_fs method for data integrity syncs, and reimplement
->write_super ontop of it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/sysv/inode.c b/fs/sysv/inode.c
index 425c976cfcd205586979befe08c5f9ed01fda968..479923456a542e34103d76001f149b642fc91df1 100644 (file)
--- a/fs/sysv/inode.c
+++ b/fs/sysv/inode.c
@@ -31,16 +31,13 @@
 #include <asm/byteorder.h>
 #include "sysv.h"
 
-/* This is only called on sync() and umount(), when s_dirt=1. */
-static void sysv_write_super(struct super_block *sb)
+static int sysv_sync_fs(struct super_block *sb, int wait)
 {
        struct sysv_sb_info *sbi = SYSV_SB(sb);
        unsigned long time = get_seconds(), old_time;
 
        lock_super(sb);
        lock_kernel();
-       if (sb->s_flags & MS_RDONLY)
-               goto clean;
 
        /*
         * If we are going to write out the super block,
@@ -54,10 +51,19 @@ static void sysv_write_super(struct super_block *sb)
                *sbi->s_sb_time = cpu_to_fs32(sbi, time);
                mark_buffer_dirty(sbi->s_bh2);
        }
-clean:
-       sb->s_dirt = 0;
+
        unlock_kernel();
        unlock_super(sb);
+
+       return 0;
+}
+
+static void sysv_write_super(struct super_block *sb)
+{
+       if (!(sb->s_flags & MS_RDONLY))
+               sysv_sync_fs(sb, 1);
+       else
+               sb->s_dirt = 0;
 }
 
 static int sysv_remount(struct super_block *sb, int *flags, char *data)
@@ -345,6 +351,7 @@ const struct super_operations sysv_sops = {
        .delete_inode   = sysv_delete_inode,
        .put_super      = sysv_put_super,
        .write_super    = sysv_write_super,
+       .sync_fs        = sysv_sync_fs,
        .remount_fs     = sysv_remount,
        .statfs         = sysv_statfs,
 };