From patchwork Mon May 25 06:32:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qu Wenruo X-Patchwork-Id: 1297118 X-Patchwork-Delegate: trini@ti.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; helo=phobos.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=suse.com Received: from phobos.denx.de (phobos.denx.de [IPv6:2a01:238:438b:c500:173d:9f52:ddab:ee01]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 49VnSf6HVtz9sSd for ; Mon, 25 May 2020 16:37:06 +1000 (AEST) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id 3AC6B818E7; Mon, 25 May 2020 08:36:24 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=none (p=none dis=none) header.from=suse.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Received: by phobos.denx.de (Postfix, from userid 109) id C6672815F5; Mon, 25 May 2020 08:34:23 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on phobos.denx.de X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.2 Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by phobos.denx.de (Postfix) with ESMTPS id 2759981589 for ; Mon, 25 May 2020 08:34:12 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=none (p=none dis=none) header.from=suse.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=wqu@suse.com Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 8CC01AD1E; Mon, 25 May 2020 06:34:14 +0000 (UTC) From: Qu Wenruo To: linux-btrfs@vger.kernel.org, u-boot@lists.denx.de Cc: marek.behun@nic.cz Subject: [PATCH U-BOOT v2 21/30] fs: btrfs: Use btrfs_lookup_path() to implement btrfs_exists() and btrfs_size() Date: Mon, 25 May 2020 14:32:48 +0800 Message-Id: <20200525063257.46757-22-wqu@suse.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200525063257.46757-1-wqu@suse.com> References: <20200525063257.46757-1-wqu@suse.com> MIME-Version: 1.0 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.30rc1 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.102.2 at phobos.denx.de X-Virus-Status: Clean The remaining function that still utilize __btrfs_lookup_path() is btrfs_read(). Signed-off-by: Qu Wenruo --- fs/btrfs/btrfs.c | 65 +++++++++++++++++++++++++++++++++++------------- fs/btrfs/inode.c | 1 - 2 files changed, 48 insertions(+), 18 deletions(-) diff --git a/fs/btrfs/btrfs.c b/fs/btrfs/btrfs.c index 2278b52e4d0e..aec91a57eceb 100644 --- a/fs/btrfs/btrfs.c +++ b/fs/btrfs/btrfs.c @@ -188,37 +188,66 @@ int btrfs_ls(const char *path) int btrfs_exists(const char *file) { - struct __btrfs_root root = btrfs_info.fs_root; - u64 inr; + struct btrfs_fs_info *fs_info = current_fs_info; + struct btrfs_root *root; + u64 ino; u8 type; + int ret; + + ASSERT(fs_info); - inr = __btrfs_lookup_path(&root, root.root_dirid, file, &type, NULL, 40); + ret = btrfs_lookup_path(fs_info->fs_root, BTRFS_FIRST_FREE_OBJECTID, + file, &root, &ino, &type, 40); + if (ret < 0) + return 0; - return (inr != -1ULL && type == BTRFS_FT_REG_FILE); + if (type == BTRFS_FT_REG_FILE) + return 1; + return 0; } int btrfs_size(const char *file, loff_t *size) { - struct __btrfs_root root = btrfs_info.fs_root; - struct btrfs_inode_item inode; - u64 inr; + struct btrfs_fs_info *fs_info = current_fs_info; + struct btrfs_inode_item *ii; + struct btrfs_root *root; + struct btrfs_path path; + struct btrfs_key key; + u64 ino; u8 type; + int ret; - inr = __btrfs_lookup_path(&root, root.root_dirid, file, &type, &inode, - 40); - - if (inr == -1ULL) { + ret = btrfs_lookup_path(fs_info->fs_root, BTRFS_FIRST_FREE_OBJECTID, + file, &root, &ino, &type, 40); + if (ret < 0) { printf("Cannot lookup file %s\n", file); - return -1; + return ret; } - if (type != BTRFS_FT_REG_FILE) { printf("Not a regular file: %s\n", file); - return -1; + return -ENOENT; } + btrfs_init_path(&path); + key.objectid = ino; + key.type = BTRFS_INODE_ITEM_KEY; + key.offset = 0; - *size = inode.size; - return 0; + ret = btrfs_search_slot(NULL, root, &key, &path, 0, 0); + if (ret < 0) { + printf("Cannot lookup ino %llu\n", ino); + return ret; + } + if (ret > 0) { + printf("Ino %llu does not exist\n", ino); + ret = -ENOENT; + goto out; + } + ii = btrfs_item_ptr(path.nodes[0], path.slots[0], + struct btrfs_inode_item); + *size = btrfs_inode_size(path.nodes[0], ii); +out: + btrfs_release_path(&path); + return ret; } int btrfs_read(const char *file, void *buf, loff_t offset, loff_t len, @@ -270,7 +299,9 @@ void btrfs_close(void) int btrfs_uuid(char *uuid_str) { #ifdef CONFIG_LIB_UUID - uuid_bin_to_str(btrfs_info.sb.fsid, uuid_str, UUID_STR_FORMAT_STD); + if (current_fs_info) + uuid_bin_to_str(current_fs_info->super_copy->fsid, uuid_str, + UUID_STR_FORMAT_STD); return 0; #endif return -ENOSYS; diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 34511d11353e..ba4121bb7adb 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -409,7 +409,6 @@ int btrfs_lookup_path(struct btrfs_root *root, u64 ino, const char *filename, } while (*cur != '\0') { - cur = skip_current_directories(cur); len = next_length(cur); if (len > BTRFS_NAME_LEN) {