Btrfs: more inode indexed directory work

Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 87c5622..61d7b47 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -921,6 +921,10 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
 int btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
                          *root, struct btrfs_path *path, u64 dir,
                          const char *name, int name_len, int mod);
+int btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
+                               struct btrfs_root *root,
+                               struct btrfs_path *path, u64 dir,
+                               u64 objectid, int mod);
 int btrfs_match_dir_item_name(struct btrfs_root *root, struct btrfs_path *path,
                              const char *name, int name_len);
 /* inode-map.c */

diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c
index 2a87e23..62d0c09 100644 (file)
--- a/fs/btrfs/dir-item.c
+++ b/fs/btrfs/dir-item.c
@@ -80,6 +80,24 @@ int btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
        return ret;
 }
 
+int btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
+                               struct btrfs_root *root,
+                               struct btrfs_path *path, u64 dir,
+                               u64 objectid, int mod)
+{
+       int ret;
+       struct btrfs_key key;
+       int ins_len = mod < 0 ? -1 : 0;
+       int cow = mod != 0;
+
+       key.objectid = dir;
+       key.flags = 0;
+       btrfs_set_key_type(&key, BTRFS_DIR_INDEX_KEY);
+       key.offset = objectid;
+       ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow);
+       return ret;
+}
+
 int btrfs_match_dir_item_name(struct btrfs_root *root,
                              struct btrfs_path *path,
                              const char *name, int name_len)

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 688aa86..7c21f63 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -224,6 +224,7 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
        path = btrfs_alloc_path();
        BUG_ON(!path);
        btrfs_init_path(path);
+
        ret = btrfs_search_slot(trans, extent_root, &key, path, -1, 1);
        if (ret) {
                printk("failed to find %Lu\n", key.objectid);
@@ -363,8 +364,6 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
        if (root->fs_info->last_insert.objectid > search_start)
                search_start = root->fs_info->last_insert.objectid;
 
-       path = btrfs_alloc_path();
-
 check_failed:
        btrfs_init_path(path);
        ins->objectid = search_start;

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 4b04246..d776b29 100644 (file)
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -132,13 +132,20 @@ static int btrfs_unlink_trans(struct btrfs_trans_handle *trans,
 
        ret = btrfs_del_item(trans, root, path);
        BUG_ON(ret);
+
+       btrfs_release_path(root, path);
+       ret = btrfs_lookup_dir_index_item(trans, root, path, dir->i_ino,
+                                         objectid, -1);
+       BUG_ON(ret);
+       ret = btrfs_del_item(trans, root, path);
+       BUG_ON(ret);
        dentry->d_inode->i_ctime = dir->i_ctime;
 err:
        btrfs_release_path(root, path);
        btrfs_free_path(path);
        if (ret == 0) {
                inode_dec_link_count(dentry->d_inode);
-               dir->i_size -= name_len;
+               dir->i_size -= name_len * 2;
                mark_inode_dirty(dir);
        }
        return ret;
@@ -168,8 +175,10 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry)
        struct btrfs_path *path;
        struct btrfs_key key;
        struct btrfs_trans_handle *trans;
-       struct btrfs_disk_key *found_key;
+       struct btrfs_key found_key;
+       int found_type;
        struct btrfs_leaf *leaf;
+       char *goodnames = "..";
 
        path = btrfs_alloc_path();
        BUG_ON(!path);
@@ -178,46 +187,42 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry)
        trans = btrfs_start_transaction(root, 1);
        key.objectid = inode->i_ino;
        key.offset = (u64)-1;
-       key.flags = 0;
-       btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY);
-       ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
-       if (ret < 0) {
-               err = ret;
-               goto out;
-       }
+       key.flags = (u32)-1;
+       while(1) {
+               ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
+               if (ret < 0) {
+                       err = ret;
+                       goto out;
+               }
+               BUG_ON(ret == 0);
+               if (path->slots[0] == 0) {
+                       err = -ENOENT;
+                       goto out;
+               }
+               path->slots[0]--;
+               leaf = btrfs_buffer_leaf(path->nodes[0]);
+               btrfs_disk_key_to_cpu(&found_key,
+                                     &leaf->items[path->slots[0]].key);
+               found_type = btrfs_key_type(&found_key);
+               if (found_key.objectid != inode->i_ino) {
+                       err = -ENOENT;
+                       goto out;
+               }
+               if ((found_type != BTRFS_DIR_ITEM_KEY &&
+                    found_type != BTRFS_DIR_INDEX_KEY) ||
+                   (!btrfs_match_dir_item_name(root, path, goodnames, 2) &&
+                   !btrfs_match_dir_item_name(root, path, goodnames, 1))) {
+                       err = -ENOTEMPTY;
+                       goto out;
+               }
+               ret = btrfs_del_item(trans, root, path);
+               BUG_ON(ret);
 
-       BUG_ON(ret == 0);
-       BUG_ON(path->slots[0] == 0);
-       path->slots[0]--;
-       leaf = btrfs_buffer_leaf(path->nodes[0]);
-       found_key = &leaf->items[path->slots[0]].key;
-       if (btrfs_disk_key_objectid(found_key) != inode->i_ino) {
-               err = -ENOENT;
-               goto out;
-       }
-       if (btrfs_disk_key_type(found_key) != BTRFS_DIR_ITEM_KEY ||
-           btrfs_disk_key_offset(found_key) != 2) {
-               err = -ENOTEMPTY;
-               goto out;
-       }
-       ret = btrfs_del_item(trans, root, path);
-       BUG_ON(ret);
-       btrfs_release_path(root, path);
-       key.offset = 1;
-       ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
-       if (ret < 0) {
-               err = ret;
-               goto out;
-       }
-       if (ret > 0) {
-               err = -ENOTEMPTY;
-               goto out;
-       }
-       ret = btrfs_del_item(trans, root, path);
-       if (ret) {
-               err = ret;
-               goto out;
+               if (found_type == BTRFS_DIR_ITEM_KEY && found_key.offset == 1)
+                       break;
+               btrfs_release_path(root, path);
        }
+       ret = 0;
        btrfs_release_path(root, path);
 
        /* now the directory is empty */
@@ -676,7 +681,7 @@ static int btrfs_add_link(struct btrfs_trans_handle *trans,
                                    dentry->d_parent->d_inode->i_ino,
                                    inode->i_ino, 0);
        if (ret == 0) {
-               dentry->d_parent->d_inode->i_size += dentry->d_name.len;
+               dentry->d_parent->d_inode->i_size += dentry->d_name.len * 2;
                ret = btrfs_update_inode(trans, btrfs_sb(inode->i_sb),
                                         dentry->d_parent->d_inode);
        }
@@ -754,7 +759,7 @@ static int btrfs_make_empty_dir(struct btrfs_trans_handle *trans,
                                    dir->i_ino, 1);
        if (ret)
                goto error;
-       inode->i_size = 3;
+       inode->i_size = 6;
        ret = btrfs_update_inode(trans, root, inode);
 error:
        return ret;
@@ -915,7 +920,6 @@ static int btrfs_get_block_lock(struct inode *inode, sector_t iblock,
        if (create)
                trans = btrfs_start_transaction(root, 1);
 
-
        ret = btrfs_lookup_file_extent(trans, root, path,
                                       inode->i_ino,
                                       iblock << inode->i_blkbits, 0);