nilfs2: separate constructor of metadata files

[safe/jmp/linux-2.6] / fs / nilfs2 / btnode.c

diff --git a/fs/nilfs2/btnode.c b/fs/nilfs2/btnode.c
index 7e0b61b..84c2538 100644 (file)
--- a/fs/nilfs2/btnode.c
+++ b/fs/nilfs2/btnode.c
@@ -36,6 +36,7 @@
 
 void nilfs_btnode_cache_init_once(struct address_space *btnc)
 {
+       memset(btnc, 0, sizeof(*btnc));
        INIT_RADIX_TREE(&btnc->page_tree, GFP_ATOMIC);
        spin_lock_init(&btnc->tree_lock);
        INIT_LIST_HEAD(&btnc->private_list);
@@ -46,7 +47,7 @@ void nilfs_btnode_cache_init_once(struct address_space *btnc)
        INIT_LIST_HEAD(&btnc->i_mmap_nonlinear);
 }
 
-static struct address_space_operations def_btnode_aops = {
+static const struct address_space_operations def_btnode_aops = {
        .sync_page              = block_sync_page,
 };
 
@@ -86,6 +87,7 @@ int nilfs_btnode_submit_block(struct address_space *btnc, __u64 blocknr,
                        brelse(bh);
                        BUG();
                }
+               memset(bh->b_data, 0, 1 << inode->i_blkbits);
                bh->b_bdev = NILFS_I_NILFS(inode)->ns_bdev;
                bh->b_blocknr = blocknr;
                set_buffer_mapped(bh);
@@ -209,6 +211,7 @@ int nilfs_btnode_prepare_change_key(struct address_space *btnc,
                 * We cannot call radix_tree_preload for the kernels older
                 * than 2.6.23, because it is not exported for modules.
                 */
+retry:
                err = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM);
                if (err)
                        goto failed_unlock;
@@ -219,7 +222,6 @@ int nilfs_btnode_prepare_change_key(struct address_space *btnc,
                                       (unsigned long long)oldkey,
                                       (unsigned long long)newkey);
 
-retry:
                spin_lock_irq(&btnc->tree_lock);
                err = radix_tree_insert(&btnc->page_tree, newkey, obh->b_page);
                spin_unlock_irq(&btnc->tree_lock);
@@ -275,8 +277,7 @@ void nilfs_btnode_commit_change_key(struct address_space *btnc,
                                       "invalid oldkey %lld (newkey=%lld)",
                                       (unsigned long long)oldkey,
                                       (unsigned long long)newkey);
-               if (!test_set_buffer_dirty(obh) && TestSetPageDirty(opage))
-                       BUG();
+               nilfs_btnode_mark_dirty(obh);
 
                spin_lock_irq(&btnc->tree_lock);
                radix_tree_delete(&btnc->page_tree, oldkey);