From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9FCCFC433DF for ; Mon, 24 Aug 2020 09:22:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7E9142074D for ; Mon, 24 Aug 2020 09:22:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598260922; bh=C6zcMQdfWST2uH7HAuv1/2Y7TTwR978n6yFKsEYL96c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=hhbFNAKUmCw8/68Y/b9m1PDEXq0nKK64JFP94brBZgU++wnaypO4RO1sUS6SnLzOd 5J2qDJBatp97wrJEfSdCJWL94HJ28QpQDhb/3azsossIvkK6Jc7TrhId1tHu5NhWQk J92iJph6JoC21Dm8+zPyCqchV6gw+iIG+gRd1STI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728879AbgHXJVv (ORCPT ); Mon, 24 Aug 2020 05:21:51 -0400 Received: from mail.kernel.org ([198.145.29.99]:37952 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729792AbgHXIzi (ORCPT ); Mon, 24 Aug 2020 04:55:38 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id ADE01204FD; Mon, 24 Aug 2020 08:55:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598259337; bh=C6zcMQdfWST2uH7HAuv1/2Y7TTwR978n6yFKsEYL96c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rW6+D8vaBoEeJ+n9XO9ToflfkiNnp/QzjnCEPuiu7XKUN1OaCgY8eY2g94Jmj2uP8 OirTowXMOydmBjHL4UD1b4Sw7XGei0MrA4r7I5R7HKB7WS1mwtlb0iRhlhgcYsZO9Q fypN9ebZrz8FRnUe3aplqkIl+w+EKNP2Y6ELw3Og= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Marcos Paulo de Souza , David Sterba , Sasha Levin Subject: [PATCH 4.19 05/71] btrfs: export helpers for subvolume name/id resolution Date: Mon, 24 Aug 2020 10:30:56 +0200 Message-Id: <20200824082356.140981583@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200824082355.848475917@linuxfoundation.org> References: <20200824082355.848475917@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Marcos Paulo de Souza [ Upstream commit c0c907a47dccf2cf26251a8fb4a8e7a3bf79ce84 ] The functions will be used outside of export.c and super.c to allow resolving subvolume name from a given id, eg. for subvolume deletion by id ioctl. Signed-off-by: Marcos Paulo de Souza Reviewed-by: David Sterba [ split from the next patch ] Signed-off-by: David Sterba Signed-off-by: Sasha Levin --- fs/btrfs/ctree.h | 2 ++ fs/btrfs/export.c | 8 ++++---- fs/btrfs/export.h | 5 +++++ fs/btrfs/super.c | 8 ++++---- 4 files changed, 15 insertions(+), 8 deletions(-) diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 15cb96ad15d8c..554727d82d432 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -3271,6 +3271,8 @@ void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info); int btrfs_parse_options(struct btrfs_fs_info *info, char *options, unsigned long new_flags); int btrfs_sync_fs(struct super_block *sb, int wait); +char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info, + u64 subvol_objectid); static inline __printf(2, 3) __cold void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) diff --git a/fs/btrfs/export.c b/fs/btrfs/export.c index 1f3755b3a37ae..665ec85cb09b8 100644 --- a/fs/btrfs/export.c +++ b/fs/btrfs/export.c @@ -57,9 +57,9 @@ static int btrfs_encode_fh(struct inode *inode, u32 *fh, int *max_len, return type; } -static struct dentry *btrfs_get_dentry(struct super_block *sb, u64 objectid, - u64 root_objectid, u32 generation, - int check_generation) +struct dentry *btrfs_get_dentry(struct super_block *sb, u64 objectid, + u64 root_objectid, u32 generation, + int check_generation) { struct btrfs_fs_info *fs_info = btrfs_sb(sb); struct btrfs_root *root; @@ -152,7 +152,7 @@ static struct dentry *btrfs_fh_to_dentry(struct super_block *sb, struct fid *fh, return btrfs_get_dentry(sb, objectid, root_objectid, generation, 1); } -static struct dentry *btrfs_get_parent(struct dentry *child) +struct dentry *btrfs_get_parent(struct dentry *child) { struct inode *dir = d_inode(child); struct btrfs_fs_info *fs_info = btrfs_sb(dir->i_sb); diff --git a/fs/btrfs/export.h b/fs/btrfs/export.h index 57488ecd7d4ef..f32f4113c976a 100644 --- a/fs/btrfs/export.h +++ b/fs/btrfs/export.h @@ -18,4 +18,9 @@ struct btrfs_fid { u64 parent_root_objectid; } __attribute__ ((packed)); +struct dentry *btrfs_get_dentry(struct super_block *sb, u64 objectid, + u64 root_objectid, u32 generation, + int check_generation); +struct dentry *btrfs_get_parent(struct dentry *child); + #endif diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index ed539496089f1..3e6e21a7c5e6f 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1000,8 +1000,8 @@ out: return error; } -static char *get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info, - u64 subvol_objectid) +char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info, + u64 subvol_objectid) { struct btrfs_root *root = fs_info->tree_root; struct btrfs_root *fs_root; @@ -1412,8 +1412,8 @@ static struct dentry *mount_subvol(const char *subvol_name, u64 subvol_objectid, goto out; } } - subvol_name = get_subvol_name_from_objectid(btrfs_sb(mnt->mnt_sb), - subvol_objectid); + subvol_name = btrfs_get_subvol_name_from_objectid( + btrfs_sb(mnt->mnt_sb), subvol_objectid); if (IS_ERR(subvol_name)) { root = ERR_CAST(subvol_name); subvol_name = NULL; -- 2.25.1