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affs: add ->sync_fs

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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>
This commit is contained in:
Christoph Hellwig 2009-06-08 10:03:15 +02:00 committed by Al Viro
parent c475879556
commit e28964365f
1 changed files with 27 additions and 13 deletions
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40
fs/affs/super.c
View file

@ -24,6 +24,19 @@ extern struct timezone sys_tz;
static int affs_statfs(struct dentry *dentry, struct kstatfs *buf);
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)
{
@ -32,13 +45,8 @@ affs_put_super(struct super_block *sb)
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 @@ static void
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 @@ affs_write_super(struct super_block *sb)
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 @@ static const struct super_operations affs_sops = {
.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,