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[76.182.20.124]) by smtp.gmail.com with ESMTPSA id d134-20020a0ddb8c000000b005ffd1bf706fsm61261ywe.96.2024.01.24.09.20.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Jan 2024 09:20:04 -0800 (PST) From: Josef Bacik To: linux-btrfs@vger.kernel.org, kernel-team@fb.com Subject: [PATCH v5 44/52] btrfs: don't search back for dir inode item in INO_LOOKUP_USER Date: Wed, 24 Jan 2024 12:19:06 -0500 Message-ID: X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit We don't need to search back to the inode item, the directory inode number is in key.offset, so simply use that. If we can't find the directory we'll get an ENOENT at the iget. Signed-off-by: Josef Bacik --- fs/btrfs/ioctl.c | 23 +++-------------------- 1 file changed, 3 insertions(+), 20 deletions(-) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 2740f0359446..f5dc281121d2 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -1902,7 +1902,7 @@ static int btrfs_search_path_in_tree_user(struct mnt_idmap *idmap, struct btrfs_root_ref *rref; struct btrfs_root *root = NULL; struct btrfs_path *path; - struct btrfs_key key, key2; + struct btrfs_key key; struct extent_buffer *leaf; struct inode *temp_inode; char *ptr; @@ -1956,24 +1956,6 @@ static int btrfs_search_path_in_tree_user(struct mnt_idmap *idmap, read_extent_buffer(leaf, ptr, (unsigned long)(iref + 1), len); - /* Check the read+exec permission of this directory */ - ret = btrfs_previous_item(root, path, dirid, - BTRFS_INODE_ITEM_KEY); - if (ret < 0) { - goto out_put; - } else if (ret > 0) { - ret = -ENOENT; - goto out_put; - } - - leaf = path->nodes[0]; - slot = path->slots[0]; - btrfs_item_key_to_cpu(leaf, &key2, slot); - if (key2.objectid != dirid) { - ret = -ENOENT; - goto out_put; - } - /* * We don't need the path anymore, so release it and * avoid deadlocks and lockdep warnings in case @@ -1981,11 +1963,12 @@ static int btrfs_search_path_in_tree_user(struct mnt_idmap *idmap, * btree and lock the same leaf. */ btrfs_release_path(path); - temp_inode = btrfs_iget(sb, key2.objectid, root); + temp_inode = btrfs_iget(sb, key.offset, root); if (IS_ERR(temp_inode)) { ret = PTR_ERR(temp_inode); goto out_put; } + /* Check the read+exec permission of this directory */ ret = inode_permission(idmap, temp_inode, MAY_READ | MAY_EXEC); iput(temp_inode); -- 2.43.0