hfsplus: 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/hfsplus/super.c b/fs/hfsplus/super.c
index 1aab8aa..9fc3af0 100644 (file)
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -152,7 +152,7 @@ static void hfsplus_clear_inode(struct inode *inode)
        }
 }
 
-static void hfsplus_write_super(struct super_block *sb)
+static int hfsplus_sync_fs(struct super_block *sb, int wait)
 {
        struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
 
@@ -160,9 +160,6 @@ static void hfsplus_write_super(struct super_block *sb)
 
        lock_super(sb);
        sb->s_dirt = 0;
-       if (sb->s_flags & MS_RDONLY)
-               /* warn? */
-               goto out;
 
        vhdr->free_blocks = cpu_to_be32(HFSPLUS_SB(sb).free_blocks);
        vhdr->next_alloc = cpu_to_be32(HFSPLUS_SB(sb).next_alloc);
@@ -194,8 +191,16 @@ static void hfsplus_write_super(struct super_block *sb)
                }
                HFSPLUS_SB(sb).flags &= ~HFSPLUS_SB_WRITEBACKUP;
        }
- out:
        unlock_super(sb);
+       return 0;
+}
+
+static void hfsplus_write_super(struct super_block *sb)
+{
+       if (!(sb->s_flags & MS_RDONLY))
+               hfsplus_sync_fs(sb, 1);
+       else
+               sb->s_dirt = 0;
 }
 
 static void hfsplus_put_super(struct super_block *sb)
@@ -290,6 +295,7 @@ static const struct super_operations hfsplus_sops = {
        .clear_inode    = hfsplus_clear_inode,
        .put_super      = hfsplus_put_super,
        .write_super    = hfsplus_write_super,
+       .sync_fs        = hfsplus_sync_fs,
        .statfs         = hfsplus_statfs,
        .remount_fs     = hfsplus_remount,
        .show_options   = hfsplus_show_options,