From patchwork Thu Oct 20 16:58:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sweet Tea Dorminy X-Patchwork-Id: 13013814 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C1A38C4332F for ; Thu, 20 Oct 2022 16:59:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229868AbiJTQ7P (ORCPT ); Thu, 20 Oct 2022 12:59:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45760 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230013AbiJTQ7O (ORCPT ); Thu, 20 Oct 2022 12:59:14 -0400 Received: from box.fidei.email (box.fidei.email [71.19.144.250]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 36CFA1B90D5; Thu, 20 Oct 2022 09:59:11 -0700 (PDT) Received: from authenticated-user (box.fidei.email [71.19.144.250]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by box.fidei.email (Postfix) with ESMTPSA id 5C11A80040; Thu, 20 Oct 2022 12:59:10 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=dorminy.me; s=mail; t=1666285151; bh=S8iPbLVzu3sGfMorvLmsWxObjUU7uNjb50ncPquLkeE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EJUFswhlQnZKL21/ORAmsh+l0zfdvDId3+/PHx4r+2nx+udjzYiCwKgtCs6sVUgQT 8LLTkc2uwDOJKVxPYHNgQyFOu2YJJwpTToDYnOmpd4A7zZE0LcxYFgbP2HyAt7Og32 hWp8s3+wdWM33U/WfUEPBT12t9b+HEyZ3xCsysA94TgccwQMDzGr+PtE8PZ0Z0PDnP mXs2CHj6zupRDg1+I6xEJw+2VdcnlPDpMeGZX0OZG/2phyDegABln2Unjwkc140mua uMJ5ee1RWbaHQp/5IoQZzQhlCh4eApYE329JlGI0lC09Zk6zBaLmdc/L0voczskyXV xNbz2E0WUjsAA== From: Sweet Tea Dorminy To: "Theodore Y. Ts'o" , Jaegeuk Kim , Eric Biggers , Chris Mason , Josef Bacik , David Sterba , linux-fscrypt@vger.kernel.org, linux-btrfs@vger.kernel.org, kernel-team@meta.com Cc: Sweet Tea Dorminy Subject: [PATCH v3 06/22] btrfs: use struct qstr instead of name and namelen Date: Thu, 20 Oct 2022 12:58:25 -0400 Message-Id: In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Many functions throughout btrfs take name buffer and name length arguments. Most of these functions at the highest level are usually called with these arguments extracted from a supplied dentry's name. But the entire name can be passed instead, making each function a little more elegant. Each function whose arguments are currently the name and length extracted from a dentry is herein converted to instead take a pointer to the name in the dentry. The couple of calls to these calls without a struct dentry are converted to create an appropriate qstr to pass in. Additionally, every function which is only called with a name/len extracted directly from a qstr is also converted. Signed-off-by: Sweet Tea Dorminy --- fs/btrfs/ctree.h | 26 ++-- fs/btrfs/dir-item.c | 50 ++++---- fs/btrfs/inode-item.c | 73 ++++++------ fs/btrfs/inode-item.h | 20 ++-- fs/btrfs/inode.c | 128 +++++++++----------- fs/btrfs/ioctl.c | 7 +- fs/btrfs/root-tree.c | 19 ++- fs/btrfs/send.c | 11 +- fs/btrfs/super.c | 3 +- fs/btrfs/transaction.c | 11 +- fs/btrfs/tree-log.c | 263 +++++++++++++++++++---------------------- fs/btrfs/tree-log.h | 4 +- 12 files changed, 283 insertions(+), 332 deletions(-) diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index a8b629a166be..2cb6c1adbfc3 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -2896,11 +2896,11 @@ static inline void btrfs_clear_sb_rdonly(struct super_block *sb) /* root-item.c */ int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, - u64 ref_id, u64 dirid, u64 sequence, const char *name, - int name_len); + u64 ref_id, u64 dirid, u64 sequence, + const struct qstr *name); int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, - u64 ref_id, u64 dirid, u64 *sequence, const char *name, - int name_len); + u64 ref_id, u64 dirid, u64 *sequence, + const struct qstr *name); int btrfs_del_root(struct btrfs_trans_handle *trans, const struct btrfs_key *key); int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, @@ -2929,25 +2929,23 @@ int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info); /* dir-item.c */ int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, - const char *name, int name_len); -int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, - int name_len, struct btrfs_inode *dir, + const struct qstr *name); +int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, + const struct qstr *name, struct btrfs_inode *dir, struct btrfs_key *location, u8 type, u64 index); struct btrfs_dir_item *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); + const struct qstr *name, int mod); struct btrfs_dir_item * btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, u64 dir, - u64 index, const char *name, int name_len, - int mod); + u64 index, const struct qstr *name, int mod); struct btrfs_dir_item * btrfs_search_dir_index_item(struct btrfs_root *root, struct btrfs_path *path, u64 dirid, - const char *name, int name_len); + const struct qstr *name); int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, @@ -3028,10 +3026,10 @@ struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); int btrfs_unlink_inode(struct btrfs_trans_handle *trans, struct btrfs_inode *dir, struct btrfs_inode *inode, - const char *name, int name_len); + const struct qstr *name); int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_inode *parent_inode, struct btrfs_inode *inode, - const char *name, int name_len, int add_backref, u64 index); + const struct qstr *name, int add_backref, u64 index); int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); int btrfs_truncate_block(struct btrfs_inode *inode, loff_t from, loff_t len, int front); diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c index 72fb2c518a2b..8c60f37eb13f 100644 --- a/fs/btrfs/dir-item.c +++ b/fs/btrfs/dir-item.c @@ -103,8 +103,8 @@ int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, * to use for the second index (if one is created). * Will return 0 or -ENOMEM */ -int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, - int name_len, struct btrfs_inode *dir, +int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, + const struct qstr *name, struct btrfs_inode *dir, struct btrfs_key *location, u8 type, u64 index) { int ret = 0; @@ -120,7 +120,7 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, key.objectid = btrfs_ino(dir); key.type = BTRFS_DIR_ITEM_KEY; - key.offset = btrfs_name_hash(name, name_len); + key.offset = btrfs_name_hash(name->name, name->len); path = btrfs_alloc_path(); if (!path) @@ -128,9 +128,9 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, btrfs_cpu_key_to_disk(&disk_key, location); - data_size = sizeof(*dir_item) + name_len; + data_size = sizeof(*dir_item) + name->len; dir_item = insert_with_overflow(trans, root, path, &key, data_size, - name, name_len); + name->name, name->len); if (IS_ERR(dir_item)) { ret = PTR_ERR(dir_item); if (ret == -EEXIST) @@ -142,11 +142,11 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, btrfs_set_dir_item_key(leaf, dir_item, &disk_key); btrfs_set_dir_type(leaf, dir_item, type); btrfs_set_dir_data_len(leaf, dir_item, 0); - btrfs_set_dir_name_len(leaf, dir_item, name_len); + btrfs_set_dir_name_len(leaf, dir_item, name->len); btrfs_set_dir_transid(leaf, dir_item, trans->transid); name_ptr = (unsigned long)(dir_item + 1); - write_extent_buffer(leaf, name, name_ptr, name_len); + write_extent_buffer(leaf, name->name, name_ptr, name->len); btrfs_mark_buffer_dirty(leaf); second_insert: @@ -157,7 +157,7 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, } btrfs_release_path(path); - ret2 = btrfs_insert_delayed_dir_index(trans, name, name_len, dir, + ret2 = btrfs_insert_delayed_dir_index(trans, name->name, name->len, dir, &disk_key, type, index); out_free: btrfs_free_path(path); @@ -206,7 +206,7 @@ static struct btrfs_dir_item *btrfs_lookup_match_dir( struct btrfs_dir_item *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, + const struct qstr *name, int mod) { struct btrfs_key key; @@ -214,9 +214,10 @@ struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, key.objectid = dir; key.type = BTRFS_DIR_ITEM_KEY; - key.offset = btrfs_name_hash(name, name_len); + key.offset = btrfs_name_hash(name->name, name->len); - di = btrfs_lookup_match_dir(trans, root, path, &key, name, name_len, mod); + di = btrfs_lookup_match_dir(trans, root, path, &key, name->name, + name->len, mod); if (IS_ERR(di) && PTR_ERR(di) == -ENOENT) return NULL; @@ -224,7 +225,7 @@ struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, } int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, - const char *name, int name_len) + const struct qstr *name) { int ret; struct btrfs_key key; @@ -240,9 +241,10 @@ int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, key.objectid = dir; key.type = BTRFS_DIR_ITEM_KEY; - key.offset = btrfs_name_hash(name, name_len); + key.offset = btrfs_name_hash(name->name, name->len); - di = btrfs_lookup_match_dir(NULL, root, path, &key, name, name_len, 0); + di = btrfs_lookup_match_dir(NULL, root, path, &key, name->name, + name->len, 0); if (IS_ERR(di)) { ret = PTR_ERR(di); /* Nothing found, we're safe */ @@ -262,11 +264,8 @@ int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, goto out; } - /* - * see if there is room in the item to insert this - * name - */ - data_size = sizeof(*di) + name_len; + /* See if there is room in the item to insert this name. */ + data_size = sizeof(*di) + name->len; leaf = path->nodes[0]; slot = path->slots[0]; if (data_size + btrfs_item_size(leaf, slot) + @@ -303,8 +302,7 @@ struct btrfs_dir_item * btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, u64 dir, - u64 index, const char *name, int name_len, - int mod) + u64 index, const struct qstr *name, int mod) { struct btrfs_dir_item *di; struct btrfs_key key; @@ -313,7 +311,8 @@ btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, key.type = BTRFS_DIR_INDEX_KEY; key.offset = index; - di = btrfs_lookup_match_dir(trans, root, path, &key, name, name_len, mod); + di = btrfs_lookup_match_dir(trans, root, path, &key, name->name, + name->len, mod); if (di == ERR_PTR(-ENOENT)) return NULL; @@ -321,9 +320,8 @@ btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, } struct btrfs_dir_item * -btrfs_search_dir_index_item(struct btrfs_root *root, - struct btrfs_path *path, u64 dirid, - const char *name, int name_len) +btrfs_search_dir_index_item(struct btrfs_root *root, struct btrfs_path *path, + u64 dirid, const struct qstr *name) { struct btrfs_dir_item *di; struct btrfs_key key; @@ -338,7 +336,7 @@ btrfs_search_dir_index_item(struct btrfs_root *root, break; di = btrfs_match_dir_item_name(root->fs_info, path, - name, name_len); + name->name, name->len); if (di) return di; } diff --git a/fs/btrfs/inode-item.c b/fs/btrfs/inode-item.c index 366f3a788c6a..643b0c555064 100644 --- a/fs/btrfs/inode-item.c +++ b/fs/btrfs/inode-item.c @@ -11,8 +11,8 @@ #include "space-info.h" struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, - int slot, const char *name, - int name_len) + int slot, + const struct qstr *name) { struct btrfs_inode_ref *ref; unsigned long ptr; @@ -28,9 +28,10 @@ struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, len = btrfs_inode_ref_name_len(leaf, ref); name_ptr = (unsigned long)(ref + 1); cur_offset += len + sizeof(*ref); - if (len != name_len) + if (len != name->len) continue; - if (memcmp_extent_buffer(leaf, name, name_ptr, name_len) == 0) + if (memcmp_extent_buffer(leaf, name->name, name_ptr, + name->len) == 0) return ref; } return NULL; @@ -38,7 +39,7 @@ struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( struct extent_buffer *leaf, int slot, u64 ref_objectid, - const char *name, int name_len) + const struct qstr *name) { struct btrfs_inode_extref *extref; unsigned long ptr; @@ -61,9 +62,10 @@ struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( name_ptr = (unsigned long)(&extref->name); ref_name_len = btrfs_inode_extref_name_len(leaf, extref); - if (ref_name_len == name_len && + if (ref_name_len == name->len && btrfs_inode_extref_parent(leaf, extref) == ref_objectid && - (memcmp_extent_buffer(leaf, name, name_ptr, name_len) == 0)) + (memcmp_extent_buffer(leaf, name->name, name_ptr, + name->len) == 0)) return extref; cur_offset += ref_name_len + sizeof(*extref); @@ -76,7 +78,7 @@ struct btrfs_inode_extref * btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, - const char *name, int name_len, + const struct qstr *name, u64 inode_objectid, u64 ref_objectid, int ins_len, int cow) { @@ -85,7 +87,7 @@ btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, key.objectid = inode_objectid; key.type = BTRFS_INODE_EXTREF_KEY; - key.offset = btrfs_extref_hash(ref_objectid, name, name_len); + key.offset = btrfs_extref_hash(ref_objectid, name->name, name->len); ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow); if (ret < 0) @@ -93,13 +95,13 @@ btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, if (ret > 0) return NULL; return btrfs_find_name_in_ext_backref(path->nodes[0], path->slots[0], - ref_objectid, name, name_len); + ref_objectid, name); } static int btrfs_del_inode_extref(struct btrfs_trans_handle *trans, struct btrfs_root *root, - const char *name, int name_len, + const struct qstr *name, u64 inode_objectid, u64 ref_objectid, u64 *index) { @@ -108,14 +110,14 @@ static int btrfs_del_inode_extref(struct btrfs_trans_handle *trans, struct btrfs_inode_extref *extref; struct extent_buffer *leaf; int ret; - int del_len = name_len + sizeof(*extref); + int del_len = name->len + sizeof(*extref); unsigned long ptr; unsigned long item_start; u32 item_size; key.objectid = inode_objectid; key.type = BTRFS_INODE_EXTREF_KEY; - key.offset = btrfs_extref_hash(ref_objectid, name, name_len); + key.offset = btrfs_extref_hash(ref_objectid, name->name, name->len); path = btrfs_alloc_path(); if (!path) @@ -133,7 +135,7 @@ static int btrfs_del_inode_extref(struct btrfs_trans_handle *trans, * readonly. */ extref = btrfs_find_name_in_ext_backref(path->nodes[0], path->slots[0], - ref_objectid, name, name_len); + ref_objectid, name); if (!extref) { btrfs_handle_fs_error(root->fs_info, -ENOENT, NULL); ret = -EROFS; @@ -169,8 +171,7 @@ static int btrfs_del_inode_extref(struct btrfs_trans_handle *trans, } int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - const char *name, int name_len, + struct btrfs_root *root, const struct qstr *name, u64 inode_objectid, u64 ref_objectid, u64 *index) { struct btrfs_path *path; @@ -183,7 +184,7 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, u32 sub_item_len; int ret; int search_ext_refs = 0; - int del_len = name_len + sizeof(*ref); + int del_len = name->len + sizeof(*ref); key.objectid = inode_objectid; key.offset = ref_objectid; @@ -202,8 +203,7 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, goto out; } - ref = btrfs_find_name_in_backref(path->nodes[0], path->slots[0], name, - name_len); + ref = btrfs_find_name_in_backref(path->nodes[0], path->slots[0], name); if (!ref) { ret = -ENOENT; search_ext_refs = 1; @@ -220,7 +220,7 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, goto out; } ptr = (unsigned long)ref; - sub_item_len = name_len + sizeof(*ref); + sub_item_len = name->len + sizeof(*ref); item_start = btrfs_item_ptr_offset(leaf, path->slots[0]); memmove_extent_buffer(leaf, ptr, ptr + sub_item_len, item_size - (ptr + sub_item_len - item_start)); @@ -234,7 +234,7 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, * name in our ref array. Find and remove the extended * inode ref then. */ - return btrfs_del_inode_extref(trans, root, name, name_len, + return btrfs_del_inode_extref(trans, root, name, inode_objectid, ref_objectid, index); } @@ -248,12 +248,13 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, */ static int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans, struct btrfs_root *root, - const char *name, int name_len, - u64 inode_objectid, u64 ref_objectid, u64 index) + const struct qstr *name, + u64 inode_objectid, u64 ref_objectid, + u64 index) { struct btrfs_inode_extref *extref; int ret; - int ins_len = name_len + sizeof(*extref); + int ins_len = name->len + sizeof(*extref); unsigned long ptr; struct btrfs_path *path; struct btrfs_key key; @@ -261,7 +262,7 @@ static int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans, key.objectid = inode_objectid; key.type = BTRFS_INODE_EXTREF_KEY; - key.offset = btrfs_extref_hash(ref_objectid, name, name_len); + key.offset = btrfs_extref_hash(ref_objectid, name->name, name->len); path = btrfs_alloc_path(); if (!path) @@ -273,7 +274,7 @@ static int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans, if (btrfs_find_name_in_ext_backref(path->nodes[0], path->slots[0], ref_objectid, - name, name_len)) + name)) goto out; btrfs_extend_item(path, ins_len); @@ -287,12 +288,12 @@ static int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans, ptr += btrfs_item_size(leaf, path->slots[0]) - ins_len; extref = (struct btrfs_inode_extref *)ptr; - btrfs_set_inode_extref_name_len(path->nodes[0], extref, name_len); + btrfs_set_inode_extref_name_len(path->nodes[0], extref, name->len); btrfs_set_inode_extref_index(path->nodes[0], extref, index); btrfs_set_inode_extref_parent(path->nodes[0], extref, ref_objectid); ptr = (unsigned long)&extref->name; - write_extent_buffer(path->nodes[0], name, ptr, name_len); + write_extent_buffer(path->nodes[0], name->name, ptr, name->len); btrfs_mark_buffer_dirty(path->nodes[0]); out: @@ -302,8 +303,7 @@ static int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans, /* Will return 0, -ENOMEM, -EMLINK, or -EEXIST or anything from the CoW path */ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - const char *name, int name_len, + struct btrfs_root *root, const struct qstr *name, u64 inode_objectid, u64 ref_objectid, u64 index) { struct btrfs_fs_info *fs_info = root->fs_info; @@ -312,7 +312,7 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, struct btrfs_inode_ref *ref; unsigned long ptr; int ret; - int ins_len = name_len + sizeof(*ref); + int ins_len = name->len + sizeof(*ref); key.objectid = inode_objectid; key.offset = ref_objectid; @@ -328,7 +328,7 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, if (ret == -EEXIST) { u32 old_size; ref = btrfs_find_name_in_backref(path->nodes[0], path->slots[0], - name, name_len); + name); if (ref) goto out; @@ -337,7 +337,7 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, ref = btrfs_item_ptr(path->nodes[0], path->slots[0], struct btrfs_inode_ref); ref = (struct btrfs_inode_ref *)((unsigned long)ref + old_size); - btrfs_set_inode_ref_name_len(path->nodes[0], ref, name_len); + btrfs_set_inode_ref_name_len(path->nodes[0], ref, name->len); btrfs_set_inode_ref_index(path->nodes[0], ref, index); ptr = (unsigned long)(ref + 1); ret = 0; @@ -345,7 +345,7 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, if (ret == -EOVERFLOW) { if (btrfs_find_name_in_backref(path->nodes[0], path->slots[0], - name, name_len)) + name)) ret = -EEXIST; else ret = -EMLINK; @@ -354,11 +354,11 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, } else { ref = btrfs_item_ptr(path->nodes[0], path->slots[0], struct btrfs_inode_ref); - btrfs_set_inode_ref_name_len(path->nodes[0], ref, name_len); + btrfs_set_inode_ref_name_len(path->nodes[0], ref, name->len); btrfs_set_inode_ref_index(path->nodes[0], ref, index); ptr = (unsigned long)(ref + 1); } - write_extent_buffer(path->nodes[0], name, ptr, name_len); + write_extent_buffer(path->nodes[0], name->name, ptr, name->len); btrfs_mark_buffer_dirty(path->nodes[0]); out: @@ -371,7 +371,6 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, if (btrfs_super_incompat_flags(disk_super) & BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) ret = btrfs_insert_inode_extref(trans, root, name, - name_len, inode_objectid, ref_objectid, index); } diff --git a/fs/btrfs/inode-item.h b/fs/btrfs/inode-item.h index a8fc16d0147f..3c657c670cfd 100644 --- a/fs/btrfs/inode-item.h +++ b/fs/btrfs/inode-item.h @@ -64,33 +64,31 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_truncate_control *control); int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - const char *name, int name_len, + struct btrfs_root *root, const struct qstr *name, u64 inode_objectid, u64 ref_objectid, u64 index); int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - const char *name, int name_len, - u64 inode_objectid, u64 ref_objectid, u64 *index); + struct btrfs_root *root, const struct qstr *name, + u64 inode_objectid, u64 ref_objectid, u64 *index); int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, u64 objectid); -int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root - *root, struct btrfs_path *path, +int btrfs_lookup_inode(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct btrfs_path *path, struct btrfs_key *location, int mod); struct btrfs_inode_extref *btrfs_lookup_inode_extref( struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, - const char *name, int name_len, + const struct qstr *name, u64 inode_objectid, u64 ref_objectid, int ins_len, int cow); struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, - int slot, const char *name, - int name_len); + int slot, + const struct qstr *name); struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( struct extent_buffer *leaf, int slot, u64 ref_objectid, - const char *name, int name_len); + const struct qstr *name); #endif diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 28328bc2e7d6..bcba5d434ad4 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -3639,7 +3639,7 @@ void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info) spin_unlock(&fs_info->delayed_iput_lock); } -/** +/* * Wait for flushing all delayed iputs * * @fs_info: the filesystem @@ -4284,7 +4284,7 @@ int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, static int __btrfs_unlink_inode(struct btrfs_trans_handle *trans, struct btrfs_inode *dir, struct btrfs_inode *inode, - const char *name, int name_len, + const struct qstr *name, struct btrfs_rename_ctx *rename_ctx) { struct btrfs_root *root = dir->root; @@ -4302,8 +4302,7 @@ static int __btrfs_unlink_inode(struct btrfs_trans_handle *trans, goto out; } - di = btrfs_lookup_dir_item(trans, root, path, dir_ino, - name, name_len, -1); + di = btrfs_lookup_dir_item(trans, root, path, dir_ino, name, -1); if (IS_ERR_OR_NULL(di)) { ret = di ? PTR_ERR(di) : -ENOENT; goto err; @@ -4331,12 +4330,11 @@ static int __btrfs_unlink_inode(struct btrfs_trans_handle *trans, } } - ret = btrfs_del_inode_ref(trans, root, name, name_len, ino, - dir_ino, &index); + ret = btrfs_del_inode_ref(trans, root, name, ino, dir_ino, &index); if (ret) { btrfs_info(fs_info, "failed to delete reference to %.*s, inode %llu parent %llu", - name_len, name, ino, dir_ino); + name->len, name->name, ino, dir_ino); btrfs_abort_transaction(trans, ret); goto err; } @@ -4357,10 +4355,8 @@ static int __btrfs_unlink_inode(struct btrfs_trans_handle *trans, * operations on the log tree, increasing latency for applications. */ if (!rename_ctx) { - btrfs_del_inode_ref_in_log(trans, root, name, name_len, inode, - dir_ino); - btrfs_del_dir_entries_in_log(trans, root, name, name_len, dir, - index); + btrfs_del_inode_ref_in_log(trans, root, name, inode, dir_ino); + btrfs_del_dir_entries_in_log(trans, root, name, dir, index); } /* @@ -4378,7 +4374,7 @@ static int __btrfs_unlink_inode(struct btrfs_trans_handle *trans, if (ret) goto out; - btrfs_i_size_write(dir, dir->vfs_inode.i_size - name_len * 2); + btrfs_i_size_write(dir, dir->vfs_inode.i_size - name->len * 2); inode_inc_iversion(&inode->vfs_inode); inode_inc_iversion(&dir->vfs_inode); inode->vfs_inode.i_ctime = current_time(&inode->vfs_inode); @@ -4391,10 +4387,10 @@ static int __btrfs_unlink_inode(struct btrfs_trans_handle *trans, int btrfs_unlink_inode(struct btrfs_trans_handle *trans, struct btrfs_inode *dir, struct btrfs_inode *inode, - const char *name, int name_len) + const struct qstr *name) { int ret; - ret = __btrfs_unlink_inode(trans, dir, inode, name, name_len, NULL); + ret = __btrfs_unlink_inode(trans, dir, inode, name, NULL); if (!ret) { drop_nlink(&inode->vfs_inode); ret = btrfs_update_inode(trans, inode->root, inode); @@ -4438,9 +4434,8 @@ static int btrfs_unlink(struct inode *dir, struct dentry *dentry) btrfs_record_unlink_dir(trans, BTRFS_I(dir), BTRFS_I(d_inode(dentry)), 0); - ret = btrfs_unlink_inode(trans, BTRFS_I(dir), - BTRFS_I(d_inode(dentry)), dentry->d_name.name, - dentry->d_name.len); + ret = btrfs_unlink_inode(trans, BTRFS_I(dir), BTRFS_I(d_inode(dentry)), + &dentry->d_name); if (ret) goto out; @@ -4465,8 +4460,7 @@ static int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, struct extent_buffer *leaf; struct btrfs_dir_item *di; struct btrfs_key key; - const char *name = dentry->d_name.name; - int name_len = dentry->d_name.len; + const struct qstr *name = &dentry->d_name; u64 index; int ret; u64 objectid; @@ -4486,7 +4480,7 @@ static int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, return -ENOMEM; di = btrfs_lookup_dir_item(trans, root, path, dir_ino, - name, name_len, -1); + name, -1); if (IS_ERR_OR_NULL(di)) { ret = di ? PTR_ERR(di) : -ENOENT; goto out; @@ -4512,8 +4506,7 @@ static int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, * call btrfs_del_root_ref, and it _shouldn't_ fail. */ if (btrfs_ino(inode) == BTRFS_EMPTY_SUBVOL_DIR_OBJECTID) { - di = btrfs_search_dir_index_item(root, path, dir_ino, - name, name_len); + di = btrfs_search_dir_index_item(root, path, dir_ino, name); if (IS_ERR_OR_NULL(di)) { if (!di) ret = -ENOENT; @@ -4530,7 +4523,7 @@ static int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, } else { ret = btrfs_del_root_ref(trans, objectid, root->root_key.objectid, dir_ino, - &index, name, name_len); + &index, name); if (ret) { btrfs_abort_transaction(trans, ret); goto out; @@ -4543,7 +4536,7 @@ static int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, goto out; } - btrfs_i_size_write(BTRFS_I(dir), dir->i_size - name_len * 2); + btrfs_i_size_write(BTRFS_I(dir), dir->i_size - name->len * 2); inode_inc_iversion(dir); dir->i_mtime = current_time(dir); dir->i_ctime = dir->i_mtime; @@ -4565,6 +4558,7 @@ static noinline int may_destroy_subvol(struct btrfs_root *root) struct btrfs_path *path; struct btrfs_dir_item *di; struct btrfs_key key; + struct qstr name = QSTR_INIT("default", 7); u64 dir_id; int ret; @@ -4575,7 +4569,7 @@ static noinline int may_destroy_subvol(struct btrfs_root *root) /* Make sure this root isn't set as the default subvol */ dir_id = btrfs_super_root_dir(fs_info->super_copy); di = btrfs_lookup_dir_item(NULL, fs_info->tree_root, path, - dir_id, "default", 7, 0); + dir_id, &name, 0); if (di && !IS_ERR(di)) { btrfs_dir_item_key_to_cpu(path->nodes[0], di, &key); if (key.objectid == root->root_key.objectid) { @@ -4842,9 +4836,8 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry) last_unlink_trans = BTRFS_I(inode)->last_unlink_trans; /* now the directory is empty */ - err = btrfs_unlink_inode(trans, BTRFS_I(dir), - BTRFS_I(d_inode(dentry)), dentry->d_name.name, - dentry->d_name.len); + err = btrfs_unlink_inode(trans, BTRFS_I(dir), BTRFS_I(d_inode(dentry)), + &dentry->d_name); if (!err) { btrfs_i_size_write(BTRFS_I(inode), 0); /* @@ -5536,8 +5529,7 @@ void btrfs_evict_inode(struct inode *inode) static int btrfs_inode_by_name(struct inode *dir, struct dentry *dentry, struct btrfs_key *location, u8 *type) { - const char *name = dentry->d_name.name; - int namelen = dentry->d_name.len; + const struct qstr *name = &dentry->d_name; struct btrfs_dir_item *di; struct btrfs_path *path; struct btrfs_root *root = BTRFS_I(dir)->root; @@ -5548,7 +5540,7 @@ static int btrfs_inode_by_name(struct inode *dir, struct dentry *dentry, return -ENOMEM; di = btrfs_lookup_dir_item(NULL, root, path, btrfs_ino(BTRFS_I(dir)), - name, namelen, 0); + name, 0); if (IS_ERR_OR_NULL(di)) { ret = di ? PTR_ERR(di) : -ENOENT; goto out; @@ -5560,7 +5552,7 @@ static int btrfs_inode_by_name(struct inode *dir, struct dentry *dentry, ret = -EUCLEAN; btrfs_warn(root->fs_info, "%s gets something invalid in DIR_ITEM (name %s, directory ino %llu, location(%llu %u %llu))", - __func__, name, btrfs_ino(BTRFS_I(dir)), + __func__, name->name, btrfs_ino(BTRFS_I(dir)), location->objectid, location->type, location->offset); } if (!ret) @@ -6319,8 +6311,7 @@ int btrfs_create_new_inode(struct btrfs_trans_handle *trans, { struct inode *dir = args->dir; struct inode *inode = args->inode; - const char *name = args->orphan ? NULL : args->dentry->d_name.name; - int name_len = args->orphan ? 0 : args->dentry->d_name.len; + const struct qstr *name = args->orphan ? NULL : &args->dentry->d_name; struct btrfs_fs_info *fs_info = btrfs_sb(dir->i_sb); struct btrfs_root *root; struct btrfs_inode_item *inode_item; @@ -6421,7 +6412,7 @@ int btrfs_create_new_inode(struct btrfs_trans_handle *trans, sizes[1] = 2 + sizeof(*ref); } else { key[1].offset = btrfs_ino(BTRFS_I(dir)); - sizes[1] = name_len + sizeof(*ref); + sizes[1] = name->len + sizeof(*ref); } } @@ -6460,10 +6451,12 @@ int btrfs_create_new_inode(struct btrfs_trans_handle *trans, btrfs_set_inode_ref_index(path->nodes[0], ref, 0); write_extent_buffer(path->nodes[0], "..", ptr, 2); } else { - btrfs_set_inode_ref_name_len(path->nodes[0], ref, name_len); + btrfs_set_inode_ref_name_len(path->nodes[0], ref, + name->len); btrfs_set_inode_ref_index(path->nodes[0], ref, BTRFS_I(inode)->dir_index); - write_extent_buffer(path->nodes[0], name, ptr, name_len); + write_extent_buffer(path->nodes[0], name->name, ptr, + name->len); } } @@ -6524,7 +6517,7 @@ int btrfs_create_new_inode(struct btrfs_trans_handle *trans, ret = btrfs_orphan_add(trans, BTRFS_I(inode)); } else { ret = btrfs_add_link(trans, BTRFS_I(dir), BTRFS_I(inode), name, - name_len, 0, BTRFS_I(inode)->dir_index); + 0, BTRFS_I(inode)->dir_index); } if (ret) { btrfs_abort_transaction(trans, ret); @@ -6553,7 +6546,7 @@ int btrfs_create_new_inode(struct btrfs_trans_handle *trans, */ int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_inode *parent_inode, struct btrfs_inode *inode, - const char *name, int name_len, int add_backref, u64 index) + const struct qstr *name, int add_backref, u64 index) { int ret = 0; struct btrfs_key key; @@ -6572,17 +6565,17 @@ int btrfs_add_link(struct btrfs_trans_handle *trans, if (unlikely(ino == BTRFS_FIRST_FREE_OBJECTID)) { ret = btrfs_add_root_ref(trans, key.objectid, root->root_key.objectid, parent_ino, - index, name, name_len); + index, name); } else if (add_backref) { - ret = btrfs_insert_inode_ref(trans, root, name, name_len, ino, - parent_ino, index); + ret = btrfs_insert_inode_ref(trans, root, name, + ino, parent_ino, index); } /* Nothing to clean up yet */ if (ret) return ret; - ret = btrfs_insert_dir_item(trans, name, name_len, parent_inode, &key, + ret = btrfs_insert_dir_item(trans, name, parent_inode, &key, btrfs_inode_type(&inode->vfs_inode), index); if (ret == -EEXIST || ret == -EOVERFLOW) goto fail_dir_item; @@ -6592,7 +6585,7 @@ int btrfs_add_link(struct btrfs_trans_handle *trans, } btrfs_i_size_write(parent_inode, parent_inode->vfs_inode.i_size + - name_len * 2); + name->len * 2); inode_inc_iversion(&parent_inode->vfs_inode); /* * If we are replaying a log tree, we do not want to update the mtime @@ -6617,15 +6610,15 @@ int btrfs_add_link(struct btrfs_trans_handle *trans, int err; err = btrfs_del_root_ref(trans, key.objectid, root->root_key.objectid, parent_ino, - &local_index, name, name_len); + &local_index, name); if (err) btrfs_abort_transaction(trans, err); } else if (add_backref) { u64 local_index; int err; - err = btrfs_del_inode_ref(trans, root, name, name_len, - ino, parent_ino, &local_index); + err = btrfs_del_inode_ref(trans, root, name, ino, parent_ino, + &local_index); if (err) btrfs_abort_transaction(trans, err); } @@ -6745,7 +6738,7 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir, set_bit(BTRFS_INODE_COPY_EVERYTHING, &BTRFS_I(inode)->runtime_flags); err = btrfs_add_link(trans, BTRFS_I(dir), BTRFS_I(inode), - dentry->d_name.name, dentry->d_name.len, 1, index); + &dentry->d_name, 1, index); if (err) { drop_inode = 1; @@ -9078,9 +9071,7 @@ static int btrfs_rename_exchange(struct inode *old_dir, /* force full log commit if subvolume involved. */ btrfs_set_log_full_commit(trans); } else { - ret = btrfs_insert_inode_ref(trans, dest, - new_dentry->d_name.name, - new_dentry->d_name.len, + ret = btrfs_insert_inode_ref(trans, dest, &new_dentry->d_name, old_ino, btrfs_ino(BTRFS_I(new_dir)), old_idx); @@ -9094,9 +9085,7 @@ static int btrfs_rename_exchange(struct inode *old_dir, /* force full log commit if subvolume involved. */ btrfs_set_log_full_commit(trans); } else { - ret = btrfs_insert_inode_ref(trans, root, - old_dentry->d_name.name, - old_dentry->d_name.len, + ret = btrfs_insert_inode_ref(trans, root, &old_dentry->d_name, new_ino, btrfs_ino(BTRFS_I(old_dir)), new_idx); @@ -9132,8 +9121,7 @@ static int btrfs_rename_exchange(struct inode *old_dir, } else { /* src is an inode */ ret = __btrfs_unlink_inode(trans, BTRFS_I(old_dir), BTRFS_I(old_dentry->d_inode), - old_dentry->d_name.name, - old_dentry->d_name.len, + &old_dentry->d_name, &old_rename_ctx); if (!ret) ret = btrfs_update_inode(trans, root, BTRFS_I(old_inode)); @@ -9149,8 +9137,7 @@ static int btrfs_rename_exchange(struct inode *old_dir, } else { /* dest is an inode */ ret = __btrfs_unlink_inode(trans, BTRFS_I(new_dir), BTRFS_I(new_dentry->d_inode), - new_dentry->d_name.name, - new_dentry->d_name.len, + &new_dentry->d_name, &new_rename_ctx); if (!ret) ret = btrfs_update_inode(trans, dest, BTRFS_I(new_inode)); @@ -9161,16 +9148,14 @@ static int btrfs_rename_exchange(struct inode *old_dir, } ret = btrfs_add_link(trans, BTRFS_I(new_dir), BTRFS_I(old_inode), - new_dentry->d_name.name, - new_dentry->d_name.len, 0, old_idx); + &new_dentry->d_name, 0, old_idx); if (ret) { btrfs_abort_transaction(trans, ret); goto out_fail; } ret = btrfs_add_link(trans, BTRFS_I(old_dir), BTRFS_I(new_inode), - old_dentry->d_name.name, - old_dentry->d_name.len, 0, new_idx); + &old_dentry->d_name, 0, new_idx); if (ret) { btrfs_abort_transaction(trans, ret); goto out_fail; @@ -9271,8 +9256,7 @@ static int btrfs_rename(struct user_namespace *mnt_userns, /* check for collisions, even if the name isn't there */ ret = btrfs_check_dir_item_collision(dest, new_dir->i_ino, - new_dentry->d_name.name, - new_dentry->d_name.len); + &new_dentry->d_name); if (ret) { if (ret == -EEXIST) { @@ -9366,9 +9350,7 @@ static int btrfs_rename(struct user_namespace *mnt_userns, /* force full log commit if subvolume involved. */ btrfs_set_log_full_commit(trans); } else { - ret = btrfs_insert_inode_ref(trans, dest, - new_dentry->d_name.name, - new_dentry->d_name.len, + ret = btrfs_insert_inode_ref(trans, dest, &new_dentry->d_name, old_ino, btrfs_ino(BTRFS_I(new_dir)), index); if (ret) @@ -9392,10 +9374,8 @@ static int btrfs_rename(struct user_namespace *mnt_userns, ret = btrfs_unlink_subvol(trans, old_dir, old_dentry); } else { ret = __btrfs_unlink_inode(trans, BTRFS_I(old_dir), - BTRFS_I(d_inode(old_dentry)), - old_dentry->d_name.name, - old_dentry->d_name.len, - &rename_ctx); + BTRFS_I(d_inode(old_dentry)), + &old_dentry->d_name, &rename_ctx); if (!ret) ret = btrfs_update_inode(trans, root, BTRFS_I(old_inode)); } @@ -9414,8 +9394,7 @@ static int btrfs_rename(struct user_namespace *mnt_userns, } else { ret = btrfs_unlink_inode(trans, BTRFS_I(new_dir), BTRFS_I(d_inode(new_dentry)), - new_dentry->d_name.name, - new_dentry->d_name.len); + &new_dentry->d_name); } if (!ret && new_inode->i_nlink == 0) ret = btrfs_orphan_add(trans, @@ -9427,8 +9406,7 @@ static int btrfs_rename(struct user_namespace *mnt_userns, } ret = btrfs_add_link(trans, BTRFS_I(new_dir), BTRFS_I(old_inode), - new_dentry->d_name.name, - new_dentry->d_name.len, 0, index); + &new_dentry->d_name, 0, index); if (ret) { btrfs_abort_transaction(trans, ret); goto out_fail; diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index d5dd8bed1488..8a381182ec42 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -949,6 +949,7 @@ static noinline int btrfs_mksubvol(const struct path *parent, struct inode *dir = d_inode(parent->dentry); struct btrfs_fs_info *fs_info = btrfs_sb(dir->i_sb); struct dentry *dentry; + struct qstr name_str = QSTR_INIT(name, namelen); int error; error = down_write_killable_nested(&dir->i_rwsem, I_MUTEX_PARENT); @@ -969,8 +970,7 @@ static noinline int btrfs_mksubvol(const struct path *parent, * check for them now when we can safely fail */ error = btrfs_check_dir_item_collision(BTRFS_I(dir)->root, - dir->i_ino, name, - namelen); + dir->i_ino, &name_str); if (error) goto out_dput; @@ -3774,6 +3774,7 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp) struct btrfs_trans_handle *trans; struct btrfs_path *path = NULL; struct btrfs_disk_key disk_key; + struct qstr name = QSTR_INIT("default", 7); u64 objectid = 0; u64 dir_id; int ret; @@ -3817,7 +3818,7 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp) dir_id = btrfs_super_root_dir(fs_info->super_copy); di = btrfs_lookup_dir_item(trans, fs_info->tree_root, path, - dir_id, "default", 7, 1); + dir_id, &name, 1); if (IS_ERR_OR_NULL(di)) { btrfs_release_path(path); btrfs_end_transaction(trans); diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c index e1f599d7a916..cf29241b9b31 100644 --- a/fs/btrfs/root-tree.c +++ b/fs/btrfs/root-tree.c @@ -327,9 +327,8 @@ int btrfs_del_root(struct btrfs_trans_handle *trans, } int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, - u64 ref_id, u64 dirid, u64 *sequence, const char *name, - int name_len) - + u64 ref_id, u64 dirid, u64 *sequence, + const struct qstr *name) { struct btrfs_root *tree_root = trans->fs_info->tree_root; struct btrfs_path *path; @@ -356,8 +355,8 @@ int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, struct btrfs_root_ref); ptr = (unsigned long)(ref + 1); if ((btrfs_root_ref_dirid(leaf, ref) != dirid) || - (btrfs_root_ref_name_len(leaf, ref) != name_len) || - memcmp_extent_buffer(leaf, name, ptr, name_len)) { + (btrfs_root_ref_name_len(leaf, ref) != name->len) || + memcmp_extent_buffer(leaf, name->name, ptr, name->len)) { ret = -ENOENT; goto out; } @@ -400,8 +399,8 @@ int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, * Will return 0, -ENOMEM, or anything from the CoW path */ int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, - u64 ref_id, u64 dirid, u64 sequence, const char *name, - int name_len) + u64 ref_id, u64 dirid, u64 sequence, + const struct qstr *name) { struct btrfs_root *tree_root = trans->fs_info->tree_root; struct btrfs_key key; @@ -420,7 +419,7 @@ int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, key.offset = ref_id; again: ret = btrfs_insert_empty_item(trans, tree_root, path, &key, - sizeof(*ref) + name_len); + sizeof(*ref) + name->len); if (ret) { btrfs_abort_transaction(trans, ret); btrfs_free_path(path); @@ -431,9 +430,9 @@ int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, ref = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_root_ref); btrfs_set_root_ref_dirid(leaf, ref, dirid); btrfs_set_root_ref_sequence(leaf, ref, sequence); - btrfs_set_root_ref_name_len(leaf, ref, name_len); + btrfs_set_root_ref_name_len(leaf, ref, name->len); ptr = (unsigned long)(ref + 1); - write_extent_buffer(leaf, name, ptr, name_len); + write_extent_buffer(leaf, name->name, ptr, name->len); btrfs_mark_buffer_dirty(leaf); if (key.type == BTRFS_ROOT_BACKREF_KEY) { diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c index ec6e1752af2c..b7566023954a 100644 --- a/fs/btrfs/send.c +++ b/fs/btrfs/send.c @@ -1596,13 +1596,16 @@ static int gen_unique_name(struct send_ctx *sctx, return -ENOMEM; while (1) { + struct qstr tmp_name; len = snprintf(tmp, sizeof(tmp), "o%llu-%llu-%llu", ino, gen, idx); ASSERT(len < sizeof(tmp)); + tmp_name.name = tmp; + tmp_name.len = strlen(tmp); di = btrfs_lookup_dir_item(NULL, sctx->send_root, path, BTRFS_FIRST_FREE_OBJECTID, - tmp, strlen(tmp), 0); + &tmp_name, 0); btrfs_release_path(path); if (IS_ERR(di)) { ret = PTR_ERR(di); @@ -1622,7 +1625,7 @@ static int gen_unique_name(struct send_ctx *sctx, di = btrfs_lookup_dir_item(NULL, sctx->parent_root, path, BTRFS_FIRST_FREE_OBJECTID, - tmp, strlen(tmp), 0); + &tmp_name, 0); btrfs_release_path(path); if (IS_ERR(di)) { ret = PTR_ERR(di); @@ -1752,13 +1755,13 @@ static int lookup_dir_item_inode(struct btrfs_root *root, struct btrfs_dir_item *di; struct btrfs_key key; struct btrfs_path *path; + struct qstr name_str = QSTR_INIT(name, name_len); path = alloc_path_for_send(); if (!path) return -ENOMEM; - di = btrfs_lookup_dir_item(NULL, root, path, - dir, name, name_len, 0); + di = btrfs_lookup_dir_item(NULL, root, path, dir, &name_str, 0); if (IS_ERR_OR_NULL(di)) { ret = di ? PTR_ERR(di) : -ENOENT; goto out; diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 688f7704d3fd..571224170d99 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1394,6 +1394,7 @@ static int get_default_subvol_objectid(struct btrfs_fs_info *fs_info, u64 *objec struct btrfs_dir_item *di; struct btrfs_path *path; struct btrfs_key location; + struct qstr name = QSTR_INIT("default", 7); u64 dir_id; path = btrfs_alloc_path(); @@ -1406,7 +1407,7 @@ static int get_default_subvol_objectid(struct btrfs_fs_info *fs_info, u64 *objec * to mount. */ dir_id = btrfs_super_root_dir(fs_info->super_copy); - di = btrfs_lookup_dir_item(NULL, root, path, dir_id, "default", 7, 0); + di = btrfs_lookup_dir_item(NULL, root, path, dir_id, &name, 0); if (IS_ERR(di)) { btrfs_free_path(path); return PTR_ERR(di); diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index ae7d4aca771d..65a79ca4ac81 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -1676,8 +1676,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, /* check if there is a file/dir which has the same name. */ dir_item = btrfs_lookup_dir_item(NULL, parent_root, path, btrfs_ino(BTRFS_I(parent_inode)), - dentry->d_name.name, - dentry->d_name.len, 0); + &dentry->d_name, 0); if (dir_item != NULL && !IS_ERR(dir_item)) { pending->error = -EEXIST; goto dir_item_existed; @@ -1772,7 +1771,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, ret = btrfs_add_root_ref(trans, objectid, parent_root->root_key.objectid, btrfs_ino(BTRFS_I(parent_inode)), index, - dentry->d_name.name, dentry->d_name.len); + &dentry->d_name); if (ret) { btrfs_abort_transaction(trans, ret); goto fail; @@ -1804,9 +1803,9 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, if (ret < 0) goto fail; - ret = btrfs_insert_dir_item(trans, dentry->d_name.name, - dentry->d_name.len, BTRFS_I(parent_inode), - &key, BTRFS_FT_DIR, index); + ret = btrfs_insert_dir_item(trans, &dentry->d_name, + BTRFS_I(parent_inode), &key, BTRFS_FT_DIR, + index); /* We have check then name at the beginning, so it is impossible. */ BUG_ON(ret == -EEXIST || ret == -EOVERFLOW); if (ret) { diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 813986e38258..139429d0f905 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -595,6 +595,20 @@ static int overwrite_item(struct btrfs_trans_handle *trans, return do_overwrite_item(trans, root, path, eb, slot, key); } +static int read_one_name(struct extent_buffer *eb, void *start, int len, + struct qstr *name) +{ + char *buf = kmalloc(len, GFP_NOFS); + + if (!buf) + return -ENOMEM; + + read_extent_buffer(eb, buf, (unsigned long)start, len); + name->name = buf; + name->len = len; + return 0; +} + /* * simple helper to read an inode off the disk from a given root * This can only be called for subvolume roots and not for the log @@ -901,12 +915,11 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans, static int unlink_inode_for_log_replay(struct btrfs_trans_handle *trans, struct btrfs_inode *dir, struct btrfs_inode *inode, - const char *name, - int name_len) + const struct qstr *name) { int ret; - ret = btrfs_unlink_inode(trans, dir, inode, name, name_len); + ret = btrfs_unlink_inode(trans, dir, inode, name); if (ret) return ret; /* @@ -933,8 +946,7 @@ static noinline int drop_one_dir_item(struct btrfs_trans_handle *trans, { struct btrfs_root *root = dir->root; struct inode *inode; - char *name; - int name_len; + struct qstr name; struct extent_buffer *leaf; struct btrfs_key location; int ret; @@ -942,12 +954,10 @@ static noinline int drop_one_dir_item(struct btrfs_trans_handle *trans, leaf = path->nodes[0]; btrfs_dir_item_key_to_cpu(leaf, di, &location); - name_len = btrfs_dir_name_len(leaf, di); - name = kmalloc(name_len, GFP_NOFS); - if (!name) + ret = read_one_name(leaf, di + 1, btrfs_dir_name_len(leaf, di), &name); + if (ret) return -ENOMEM; - read_extent_buffer(leaf, name, (unsigned long)(di + 1), name_len); btrfs_release_path(path); inode = read_one_inode(root, location.objectid); @@ -960,10 +970,9 @@ static noinline int drop_one_dir_item(struct btrfs_trans_handle *trans, if (ret) goto out; - ret = unlink_inode_for_log_replay(trans, dir, BTRFS_I(inode), name, - name_len); + ret = unlink_inode_for_log_replay(trans, dir, BTRFS_I(inode), &name); out: - kfree(name); + kfree(name.name); iput(inode); return ret; } @@ -978,14 +987,14 @@ static noinline int drop_one_dir_item(struct btrfs_trans_handle *trans, static noinline int inode_in_dir(struct btrfs_root *root, struct btrfs_path *path, u64 dirid, u64 objectid, u64 index, - const char *name, int name_len) + struct qstr *name) { struct btrfs_dir_item *di; struct btrfs_key location; int ret = 0; di = btrfs_lookup_dir_index_item(NULL, root, path, dirid, - index, name, name_len, 0); + index, name, 0); if (IS_ERR(di)) { ret = PTR_ERR(di); goto out; @@ -998,7 +1007,7 @@ static noinline int inode_in_dir(struct btrfs_root *root, } btrfs_release_path(path); - di = btrfs_lookup_dir_item(NULL, root, path, dirid, name, name_len, 0); + di = btrfs_lookup_dir_item(NULL, root, path, dirid, name, 0); if (IS_ERR(di)) { ret = PTR_ERR(di); goto out; @@ -1025,7 +1034,7 @@ static noinline int inode_in_dir(struct btrfs_root *root, static noinline int backref_in_log(struct btrfs_root *log, struct btrfs_key *key, u64 ref_objectid, - const char *name, int namelen) + const struct qstr *name) { struct btrfs_path *path; int ret; @@ -1045,12 +1054,10 @@ static noinline int backref_in_log(struct btrfs_root *log, if (key->type == BTRFS_INODE_EXTREF_KEY) ret = !!btrfs_find_name_in_ext_backref(path->nodes[0], path->slots[0], - ref_objectid, - name, namelen); + ref_objectid, name); else ret = !!btrfs_find_name_in_backref(path->nodes[0], - path->slots[0], - name, namelen); + path->slots[0], name); out: btrfs_free_path(path); return ret; @@ -1063,11 +1070,9 @@ static inline int __add_inode_ref(struct btrfs_trans_handle *trans, struct btrfs_inode *dir, struct btrfs_inode *inode, u64 inode_objectid, u64 parent_objectid, - u64 ref_index, char *name, int namelen) + u64 ref_index, struct qstr *name) { int ret; - char *victim_name; - int victim_name_len; struct extent_buffer *leaf; struct btrfs_dir_item *di; struct btrfs_key search_key; @@ -1099,43 +1104,39 @@ static inline int __add_inode_ref(struct btrfs_trans_handle *trans, ptr = btrfs_item_ptr_offset(leaf, path->slots[0]); ptr_end = ptr + btrfs_item_size(leaf, path->slots[0]); while (ptr < ptr_end) { + struct qstr victim_name; victim_ref = (struct btrfs_inode_ref *)ptr; - victim_name_len = btrfs_inode_ref_name_len(leaf, - victim_ref); - victim_name = kmalloc(victim_name_len, GFP_NOFS); - if (!victim_name) - return -ENOMEM; - - read_extent_buffer(leaf, victim_name, - (unsigned long)(victim_ref + 1), - victim_name_len); + ret = read_one_name(leaf, (victim_ref + 1), + btrfs_inode_ref_name_len(leaf, victim_ref), + &victim_name); + if (ret) + return ret; ret = backref_in_log(log_root, &search_key, - parent_objectid, victim_name, - victim_name_len); + parent_objectid, &victim_name); if (ret < 0) { - kfree(victim_name); + kfree(victim_name.name); return ret; } else if (!ret) { inc_nlink(&inode->vfs_inode); btrfs_release_path(path); ret = unlink_inode_for_log_replay(trans, dir, inode, - victim_name, victim_name_len); - kfree(victim_name); + &victim_name); + kfree(victim_name.name); if (ret) return ret; goto again; } - kfree(victim_name); + kfree(victim_name.name); - ptr = (unsigned long)(victim_ref + 1) + victim_name_len; + ptr = (unsigned long)(victim_ref + 1) + victim_name.len; } } btrfs_release_path(path); /* Same search but for extended refs */ - extref = btrfs_lookup_inode_extref(NULL, root, path, name, namelen, + extref = btrfs_lookup_inode_extref(NULL, root, path, name, inode_objectid, parent_objectid, 0, 0); if (IS_ERR(extref)) { @@ -1152,29 +1153,27 @@ static inline int __add_inode_ref(struct btrfs_trans_handle *trans, base = btrfs_item_ptr_offset(leaf, path->slots[0]); while (cur_offset < item_size) { + struct qstr victim_name; extref = (struct btrfs_inode_extref *)(base + cur_offset); - victim_name_len = btrfs_inode_extref_name_len(leaf, extref); - if (btrfs_inode_extref_parent(leaf, extref) != parent_objectid) goto next; - victim_name = kmalloc(victim_name_len, GFP_NOFS); - if (!victim_name) - return -ENOMEM; - read_extent_buffer(leaf, victim_name, (unsigned long)&extref->name, - victim_name_len); + ret = read_one_name(leaf, &extref->name, + btrfs_inode_extref_name_len(leaf, extref), + &victim_name); + if (ret) + return ret; search_key.objectid = inode_objectid; search_key.type = BTRFS_INODE_EXTREF_KEY; search_key.offset = btrfs_extref_hash(parent_objectid, - victim_name, - victim_name_len); + victim_name.name, + victim_name.len); ret = backref_in_log(log_root, &search_key, - parent_objectid, victim_name, - victim_name_len); + parent_objectid, &victim_name); if (ret < 0) { - kfree(victim_name); + kfree(victim_name.name); return ret; } else if (!ret) { ret = -ENOENT; @@ -1186,26 +1185,24 @@ static inline int __add_inode_ref(struct btrfs_trans_handle *trans, ret = unlink_inode_for_log_replay(trans, BTRFS_I(victim_parent), - inode, - victim_name, - victim_name_len); + inode, &victim_name); } iput(victim_parent); - kfree(victim_name); + kfree(victim_name.name); if (ret) return ret; goto again; } - kfree(victim_name); + kfree(victim_name.name); next: - cur_offset += victim_name_len + sizeof(*extref); + cur_offset += victim_name.len + sizeof(*extref); } } btrfs_release_path(path); /* look for a conflicting sequence number */ di = btrfs_lookup_dir_index_item(trans, root, path, btrfs_ino(dir), - ref_index, name, namelen, 0); + ref_index, name, 0); if (IS_ERR(di)) { return PTR_ERR(di); } else if (di) { @@ -1216,8 +1213,7 @@ static inline int __add_inode_ref(struct btrfs_trans_handle *trans, btrfs_release_path(path); /* look for a conflicting name */ - di = btrfs_lookup_dir_item(trans, root, path, btrfs_ino(dir), - name, namelen, 0); + di = btrfs_lookup_dir_item(trans, root, path, btrfs_ino(dir), name, 0); if (IS_ERR(di)) { return PTR_ERR(di); } else if (di) { @@ -1231,20 +1227,18 @@ static inline int __add_inode_ref(struct btrfs_trans_handle *trans, } static int extref_get_fields(struct extent_buffer *eb, unsigned long ref_ptr, - u32 *namelen, char **name, u64 *index, + struct qstr *name, u64 *index, u64 *parent_objectid) { struct btrfs_inode_extref *extref; + int ret; extref = (struct btrfs_inode_extref *)ref_ptr; - *namelen = btrfs_inode_extref_name_len(eb, extref); - *name = kmalloc(*namelen, GFP_NOFS); - if (*name == NULL) - return -ENOMEM; - - read_extent_buffer(eb, *name, (unsigned long)&extref->name, - *namelen); + ret = read_one_name(eb, &extref->name, + btrfs_inode_extref_name_len(eb, extref), name); + if (ret) + return ret; if (index) *index = btrfs_inode_extref_index(eb, extref); @@ -1255,18 +1249,17 @@ static int extref_get_fields(struct extent_buffer *eb, unsigned long ref_ptr, } static int ref_get_fields(struct extent_buffer *eb, unsigned long ref_ptr, - u32 *namelen, char **name, u64 *index) + struct qstr *name, u64 *index) { struct btrfs_inode_ref *ref; + int ret; ref = (struct btrfs_inode_ref *)ref_ptr; - *namelen = btrfs_inode_ref_name_len(eb, ref); - *name = kmalloc(*namelen, GFP_NOFS); - if (*name == NULL) - return -ENOMEM; - - read_extent_buffer(eb, *name, (unsigned long)(ref + 1), *namelen); + ret = read_one_name(eb, ref + 1, btrfs_inode_ref_name_len(eb, ref), + name); + if (ret) + return ret; if (index) *index = btrfs_inode_ref_index(eb, ref); @@ -1308,28 +1301,26 @@ static int unlink_old_inode_refs(struct btrfs_trans_handle *trans, ref_ptr = btrfs_item_ptr_offset(eb, path->slots[0]); ref_end = ref_ptr + btrfs_item_size(eb, path->slots[0]); while (ref_ptr < ref_end) { - char *name = NULL; - int namelen; + struct qstr name; u64 parent_id; if (key->type == BTRFS_INODE_EXTREF_KEY) { - ret = extref_get_fields(eb, ref_ptr, &namelen, &name, + ret = extref_get_fields(eb, ref_ptr, &name, NULL, &parent_id); } else { parent_id = key->offset; - ret = ref_get_fields(eb, ref_ptr, &namelen, &name, - NULL); + ret = ref_get_fields(eb, ref_ptr, &name, NULL); } if (ret) goto out; if (key->type == BTRFS_INODE_EXTREF_KEY) ret = !!btrfs_find_name_in_ext_backref(log_eb, log_slot, - parent_id, name, - namelen); + parent_id, + &name); else ret = !!btrfs_find_name_in_backref(log_eb, log_slot, - name, namelen); + &name); if (!ret) { struct inode *dir; @@ -1338,20 +1329,20 @@ static int unlink_old_inode_refs(struct btrfs_trans_handle *trans, dir = read_one_inode(root, parent_id); if (!dir) { ret = -ENOENT; - kfree(name); + kfree(name.name); goto out; } ret = unlink_inode_for_log_replay(trans, BTRFS_I(dir), - inode, name, namelen); - kfree(name); + inode, &name); + kfree(name.name); iput(dir); if (ret) goto out; goto again; } - kfree(name); - ref_ptr += namelen; + kfree(name.name); + ref_ptr += name.len; if (key->type == BTRFS_INODE_EXTREF_KEY) ref_ptr += sizeof(struct btrfs_inode_extref); else @@ -1380,8 +1371,7 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans, struct inode *inode = NULL; unsigned long ref_ptr; unsigned long ref_end; - char *name = NULL; - int namelen; + struct qstr name; int ret; int log_ref_ver = 0; u64 parent_objectid; @@ -1425,7 +1415,7 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans, while (ref_ptr < ref_end) { if (log_ref_ver) { - ret = extref_get_fields(eb, ref_ptr, &namelen, &name, + ret = extref_get_fields(eb, ref_ptr, &name, &ref_index, &parent_objectid); /* * parent object can change from one array @@ -1438,15 +1428,14 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans, goto out; } } else { - ret = ref_get_fields(eb, ref_ptr, &namelen, &name, - &ref_index); + ret = ref_get_fields(eb, ref_ptr, &name, &ref_index); } if (ret) goto out; ret = inode_in_dir(root, path, btrfs_ino(BTRFS_I(dir)), btrfs_ino(BTRFS_I(inode)), ref_index, - name, namelen); + &name); if (ret < 0) { goto out; } else if (ret == 0) { @@ -1460,7 +1449,7 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans, ret = __add_inode_ref(trans, root, path, log, BTRFS_I(dir), BTRFS_I(inode), inode_objectid, parent_objectid, - ref_index, name, namelen); + ref_index, &name); if (ret) { if (ret == 1) ret = 0; @@ -1469,7 +1458,7 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans, /* insert our name */ ret = btrfs_add_link(trans, BTRFS_I(dir), BTRFS_I(inode), - name, namelen, 0, ref_index); + &name, 0, ref_index); if (ret) goto out; @@ -1479,9 +1468,9 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans, } /* Else, ret == 1, we already have a perfect match, we're done. */ - ref_ptr = (unsigned long)(ref_ptr + ref_struct_size) + namelen; - kfree(name); - name = NULL; + ref_ptr = (unsigned long)(ref_ptr + ref_struct_size) + name.len; + kfree(name.name); + name.name = NULL; if (log_ref_ver) { iput(dir); dir = NULL; @@ -1505,7 +1494,7 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans, ret = overwrite_item(trans, root, path, eb, slot, key); out: btrfs_release_path(path); - kfree(name); + kfree(name.name); iput(dir); iput(inode); return ret; @@ -1777,7 +1766,7 @@ static noinline int link_to_fixup_dir(struct btrfs_trans_handle *trans, static noinline int insert_one_name(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 dirid, u64 index, - char *name, int name_len, + const struct qstr *name, struct btrfs_key *location) { struct inode *inode; @@ -1795,7 +1784,7 @@ static noinline int insert_one_name(struct btrfs_trans_handle *trans, } ret = btrfs_add_link(trans, BTRFS_I(dir), BTRFS_I(inode), name, - name_len, 1, index); + 1, index); /* FIXME, put inode into FIXUP list */ @@ -1855,8 +1844,7 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans, struct btrfs_dir_item *di, struct btrfs_key *key) { - char *name; - int name_len; + struct qstr name; struct btrfs_dir_item *dir_dst_di; struct btrfs_dir_item *index_dst_di; bool dir_dst_matches = false; @@ -1874,17 +1862,11 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans, if (!dir) return -EIO; - name_len = btrfs_dir_name_len(eb, di); - name = kmalloc(name_len, GFP_NOFS); - if (!name) { - ret = -ENOMEM; + ret = read_one_name(eb, di + 1, btrfs_dir_name_len(eb, di), &name); + if (ret) goto out; - } log_type = btrfs_dir_type(eb, di); - read_extent_buffer(eb, name, (unsigned long)(di + 1), - name_len); - btrfs_dir_item_key_to_cpu(eb, di, &log_key); ret = btrfs_lookup_inode(trans, root, path, &log_key, 0); btrfs_release_path(path); @@ -1894,7 +1876,7 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans, ret = 0; dir_dst_di = btrfs_lookup_dir_item(trans, root, path, key->objectid, - name, name_len, 1); + &name, 1); if (IS_ERR(dir_dst_di)) { ret = PTR_ERR(dir_dst_di); goto out; @@ -1911,7 +1893,7 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans, index_dst_di = btrfs_lookup_dir_index_item(trans, root, path, key->objectid, key->offset, - name, name_len, 1); + &name, 1); if (IS_ERR(index_dst_di)) { ret = PTR_ERR(index_dst_di); goto out; @@ -1939,7 +1921,7 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans, search_key.objectid = log_key.objectid; search_key.type = BTRFS_INODE_REF_KEY; search_key.offset = key->objectid; - ret = backref_in_log(root->log_root, &search_key, 0, name, name_len); + ret = backref_in_log(root->log_root, &search_key, 0, &name); if (ret < 0) { goto out; } else if (ret) { @@ -1952,8 +1934,7 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans, search_key.objectid = log_key.objectid; search_key.type = BTRFS_INODE_EXTREF_KEY; search_key.offset = key->objectid; - ret = backref_in_log(root->log_root, &search_key, key->objectid, name, - name_len); + ret = backref_in_log(root->log_root, &search_key, key->objectid, &name); if (ret < 0) { goto out; } else if (ret) { @@ -1964,7 +1945,7 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans, } btrfs_release_path(path); ret = insert_one_name(trans, root, key->objectid, key->offset, - name, name_len, &log_key); + &name, &log_key); if (ret && ret != -ENOENT && ret != -EEXIST) goto out; if (!ret) @@ -1974,10 +1955,10 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans, out: if (!ret && update_size) { - btrfs_i_size_write(BTRFS_I(dir), dir->i_size + name_len * 2); + btrfs_i_size_write(BTRFS_I(dir), dir->i_size + name.len * 2); ret = btrfs_update_inode(trans, root, BTRFS_I(dir)); } - kfree(name); + kfree(name.name); iput(dir); if (!ret && name_added) ret = 1; @@ -2143,8 +2124,7 @@ static noinline int check_item_in_log(struct btrfs_trans_handle *trans, struct extent_buffer *eb; int slot; struct btrfs_dir_item *di; - int name_len; - char *name; + struct qstr name; struct inode *inode = NULL; struct btrfs_key location; @@ -2159,22 +2139,16 @@ static noinline int check_item_in_log(struct btrfs_trans_handle *trans, eb = path->nodes[0]; slot = path->slots[0]; di = btrfs_item_ptr(eb, slot, struct btrfs_dir_item); - name_len = btrfs_dir_name_len(eb, di); - name = kmalloc(name_len, GFP_NOFS); - if (!name) { - ret = -ENOMEM; + ret = read_one_name(eb, di + 1, btrfs_dir_name_len(eb, di), &name); + if (ret) goto out; - } - - read_extent_buffer(eb, name, (unsigned long)(di + 1), name_len); if (log) { struct btrfs_dir_item *log_di; log_di = btrfs_lookup_dir_index_item(trans, log, log_path, dir_key->objectid, - dir_key->offset, - name, name_len, 0); + dir_key->offset, &name, 0); if (IS_ERR(log_di)) { ret = PTR_ERR(log_di); goto out; @@ -2200,7 +2174,7 @@ static noinline int check_item_in_log(struct btrfs_trans_handle *trans, inc_nlink(inode); ret = unlink_inode_for_log_replay(trans, BTRFS_I(dir), BTRFS_I(inode), - name, name_len); + &name); /* * Unlike dir item keys, dir index keys can only have one name (entry) in * them, as there are no key collisions since each key has a unique offset @@ -2209,7 +2183,7 @@ static noinline int check_item_in_log(struct btrfs_trans_handle *trans, out: btrfs_release_path(path); btrfs_release_path(log_path); - kfree(name); + kfree(name.name); iput(inode); return ret; } @@ -3448,7 +3422,7 @@ static int del_logged_dentry(struct btrfs_trans_handle *trans, struct btrfs_root *log, struct btrfs_path *path, u64 dir_ino, - const char *name, int name_len, + const struct qstr *name, u64 index) { struct btrfs_dir_item *di; @@ -3458,7 +3432,7 @@ static int del_logged_dentry(struct btrfs_trans_handle *trans, * for dir item keys. */ di = btrfs_lookup_dir_index_item(trans, log, path, dir_ino, - index, name, name_len, -1); + index, name, -1); if (IS_ERR(di)) return PTR_ERR(di); else if (!di) @@ -3495,7 +3469,7 @@ static int del_logged_dentry(struct btrfs_trans_handle *trans, */ void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans, struct btrfs_root *root, - const char *name, int name_len, + const struct qstr *name, struct btrfs_inode *dir, u64 index) { struct btrfs_path *path; @@ -3522,7 +3496,7 @@ void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans, } ret = del_logged_dentry(trans, root->log_root, path, btrfs_ino(dir), - name, name_len, index); + name, index); btrfs_free_path(path); out_unlock: mutex_unlock(&dir->log_mutex); @@ -3534,7 +3508,7 @@ void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans, /* see comments for btrfs_del_dir_entries_in_log */ void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans, struct btrfs_root *root, - const char *name, int name_len, + const struct qstr *name, struct btrfs_inode *inode, u64 dirid) { struct btrfs_root *log; @@ -3555,7 +3529,7 @@ void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans, log = root->log_root; mutex_lock(&inode->log_mutex); - ret = btrfs_del_inode_ref(trans, log, name, name_len, btrfs_ino(inode), + ret = btrfs_del_inode_ref(trans, log, name, btrfs_ino(inode), dirid, &index); mutex_unlock(&inode->log_mutex); if (ret < 0 && ret != -ENOENT) @@ -5218,6 +5192,7 @@ static int btrfs_check_ref_name_override(struct extent_buffer *eb, u32 this_len; unsigned long name_ptr; struct btrfs_dir_item *di; + struct qstr name_str; if (key->type == BTRFS_INODE_REF_KEY) { struct btrfs_inode_ref *iref; @@ -5251,8 +5226,11 @@ static int btrfs_check_ref_name_override(struct extent_buffer *eb, } read_extent_buffer(eb, name, name_ptr, this_name_len); + + name_str.name = name; + name_str.len = this_name_len; di = btrfs_lookup_dir_item(NULL, inode->root, search_path, - parent, name, this_name_len, 0); + parent, &name_str, 0); if (di && !IS_ERR(di)) { struct btrfs_key di_key; @@ -7453,8 +7431,7 @@ void btrfs_log_new_name(struct btrfs_trans_handle *trans, */ mutex_lock(&old_dir->log_mutex); ret = del_logged_dentry(trans, log, path, btrfs_ino(old_dir), - old_dentry->d_name.name, - old_dentry->d_name.len, old_dir_index); + &old_dentry->d_name, old_dir_index); if (ret > 0) { /* * The dentry does not exist in the log, so record its diff --git a/fs/btrfs/tree-log.h b/fs/btrfs/tree-log.h index aed1e05e9879..59dc4359c8c4 100644 --- a/fs/btrfs/tree-log.h +++ b/fs/btrfs/tree-log.h @@ -86,11 +86,11 @@ int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans, struct btrfs_log_ctx *ctx); void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans, struct btrfs_root *root, - const char *name, int name_len, + const struct qstr *name, struct btrfs_inode *dir, u64 index); void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans, struct btrfs_root *root, - const char *name, int name_len, + const struct qstr *name, struct btrfs_inode *inode, u64 dirid); void btrfs_end_log_trans(struct btrfs_root *root); void btrfs_pin_log_trans(struct btrfs_root *root);