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@@ -232,9 +232,85 @@ fail:
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return ERR_PTR(ret);
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}
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+static int btrfs_get_name(struct dentry *parent, char *name,
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+ struct dentry *child)
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+{
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+ struct inode *inode = child->d_inode;
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+ struct inode *dir = parent->d_inode;
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+ struct btrfs_path *path;
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+ struct btrfs_root *root = BTRFS_I(dir)->root;
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+ struct btrfs_inode_ref *iref;
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+ struct btrfs_root_ref *rref;
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+ struct extent_buffer *leaf;
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+ unsigned long name_ptr;
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+ struct btrfs_key key;
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+ int name_len;
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+ int ret;
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+
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+ if (!dir || !inode)
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+ return -EINVAL;
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+
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+ if (!S_ISDIR(dir->i_mode))
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+ return -EINVAL;
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+
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+ path = btrfs_alloc_path();
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+ if (!path)
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+ return -ENOMEM;
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+ path->leave_spinning = 1;
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+
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+ if (inode->i_ino == BTRFS_FIRST_FREE_OBJECTID) {
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+ key.objectid = BTRFS_I(inode)->root->root_key.objectid;
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+ key.type = BTRFS_ROOT_BACKREF_KEY;
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+ key.offset = (u64)-1;
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+ root = root->fs_info->tree_root;
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+ } else {
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+ key.objectid = inode->i_ino;
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+ key.offset = dir->i_ino;
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+ key.type = BTRFS_INODE_REF_KEY;
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+ }
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+
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+ ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
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+ if (ret < 0) {
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+ btrfs_free_path(path);
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+ return ret;
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+ } else if (ret > 0) {
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+ if (inode->i_ino == BTRFS_FIRST_FREE_OBJECTID) {
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+ path->slots[0]--;
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+ } else {
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+ btrfs_free_path(path);
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+ return -ENOENT;
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+ }
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+ }
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+ leaf = path->nodes[0];
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+
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+ if (inode->i_ino == BTRFS_FIRST_FREE_OBJECTID) {
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+ rref = btrfs_item_ptr(leaf, path->slots[0],
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+ struct btrfs_root_ref);
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+ name_ptr = (unsigned long)(rref + 1);
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+ name_len = btrfs_root_ref_name_len(leaf, rref);
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+ } else {
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+ iref = btrfs_item_ptr(leaf, path->slots[0],
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+ struct btrfs_inode_ref);
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+ name_ptr = (unsigned long)(iref + 1);
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+ name_len = btrfs_inode_ref_name_len(leaf, iref);
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+ }
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+
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+ read_extent_buffer(leaf, name, name_ptr, name_len);
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+ btrfs_free_path(path);
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+
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+ /*
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+ * have to add the null termination to make sure that reconnect_path
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+ * gets the right len for strlen
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+ */
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+ name[name_len] = '\0';
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+
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+ return 0;
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+}
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+
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const struct export_operations btrfs_export_ops = {
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.encode_fh = btrfs_encode_fh,
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.fh_to_dentry = btrfs_fh_to_dentry,
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.fh_to_parent = btrfs_fh_to_parent,
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.get_parent = btrfs_get_parent,
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+ .get_name = btrfs_get_name,
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};
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