affs: add ->sync_fs
Add a ->sync_fs method for data integrity syncs. Factor out common code
between affs_put_super, affs_write_super and the new affs_sync_fs into
a helper.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/affs/super.c b/fs/affs/super.c
index c481493..104fdcb 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -25,6 +25,19 @@
static int affs_remount (struct super_block *sb, int *flags, char *data);
static void
+affs_commit_super(struct super_block *sb, int clean)
+{
+ struct affs_sb_info *sbi = AFFS_SB(sb);
+ struct buffer_head *bh = sbi->s_root_bh;
+ struct affs_root_tail *tail = AFFS_ROOT_TAIL(sb, bh);
+
+ tail->bm_flag = cpu_to_be32(clean);
+ secs_to_datestamp(get_seconds(), &tail->disk_change);
+ affs_fix_checksum(sb, bh);
+ mark_buffer_dirty(bh);
+}
+
+static void
affs_put_super(struct super_block *sb)
{
struct affs_sb_info *sbi = AFFS_SB(sb);
@@ -32,13 +45,8 @@
lock_kernel();
- if (!(sb->s_flags & MS_RDONLY)) {
- AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->bm_flag = cpu_to_be32(1);
- secs_to_datestamp(get_seconds(),
- &AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->disk_change);
- affs_fix_checksum(sb, sbi->s_root_bh);
- mark_buffer_dirty(sbi->s_root_bh);
- }
+ if (!(sb->s_flags & MS_RDONLY))
+ affs_commit_super(sb, 1);
kfree(sbi->s_prefix);
affs_free_bitmap(sb);
@@ -53,18 +61,13 @@
affs_write_super(struct super_block *sb)
{
int clean = 2;
- struct affs_sb_info *sbi = AFFS_SB(sb);
lock_super(sb);
if (!(sb->s_flags & MS_RDONLY)) {
// if (sbi->s_bitmap[i].bm_bh) {
// if (buffer_dirty(sbi->s_bitmap[i].bm_bh)) {
// clean = 0;
- AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->bm_flag = cpu_to_be32(clean);
- secs_to_datestamp(get_seconds(),
- &AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->disk_change);
- affs_fix_checksum(sb, sbi->s_root_bh);
- mark_buffer_dirty(sbi->s_root_bh);
+ affs_commit_super(sb, clean);
sb->s_dirt = !clean; /* redo until bitmap synced */
} else
sb->s_dirt = 0;
@@ -73,6 +76,16 @@
pr_debug("AFFS: write_super() at %lu, clean=%d\n", get_seconds(), clean);
}
+static int
+affs_sync_fs(struct super_block *sb, int wait)
+{
+ lock_super(sb);
+ affs_commit_super(sb, 2);
+ sb->s_dirt = 0;
+ unlock_super(sb);
+ return 0;
+}
+
static struct kmem_cache * affs_inode_cachep;
static struct inode *affs_alloc_inode(struct super_block *sb)
@@ -130,6 +143,7 @@
.clear_inode = affs_clear_inode,
.put_super = affs_put_super,
.write_super = affs_write_super,
+ .sync_fs = affs_sync_fs,
.statfs = affs_statfs,
.remount_fs = affs_remount,
.show_options = generic_show_options,