From patchwork Mon Jan 28 04:10:23 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anand Jain X-Patchwork-Id: 2053161 Return-Path: X-Original-To: patchwork-linux-btrfs@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 1B31AE00E6 for ; Mon, 28 Jan 2013 04:04:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753664Ab3A1EEg (ORCPT ); Sun, 27 Jan 2013 23:04:36 -0500 Received: from aserp1040.oracle.com ([141.146.126.69]:33160 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753412Ab3A1EEd (ORCPT ); Sun, 27 Jan 2013 23:04:33 -0500 Received: from acsinet21.oracle.com (acsinet21.oracle.com [141.146.126.237]) by aserp1040.oracle.com (Sentrion-MTA-4.3.1/Sentrion-MTA-4.3.1) with ESMTP id r0S43j3p009482 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Mon, 28 Jan 2013 04:03:46 GMT Received: from acsmt357.oracle.com (acsmt357.oracle.com [141.146.40.157]) by acsinet21.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id r0S43iE5017142 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 28 Jan 2013 04:03:45 GMT Received: from abhmt117.oracle.com (abhmt117.oracle.com [141.146.116.69]) by acsmt357.oracle.com (8.12.11.20060308/8.12.11) with ESMTP id r0S43ij0000407; Sun, 27 Jan 2013 22:03:44 -0600 Received: from wish.sg.oracle.com (/10.186.101.18) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Sun, 27 Jan 2013 20:03:44 -0800 From: Anand Jain To: linux-btrfs@vger.kernel.org, dsterba@suse.cz, gene@czarc.net Subject: [PATCH 05/10] Btrfs-progs: add function btrfs_get_subvol to get root_info of a subvol Date: Mon, 28 Jan 2013 12:10:23 +0800 Message-Id: <1359346228-24804-6-git-send-email-anand.jain@oracle.com> X-Mailer: git-send-email 1.8.1.164.g2d0029e In-Reply-To: <1359346228-24804-1-git-send-email-anand.jain@oracle.com> References: <1359346228-24804-1-git-send-email-anand.jain@oracle.com> X-Source-IP: acsinet21.oracle.com [141.146.126.237] Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org We need a function which can get the root_info of a given subvol. This is in preparation to add support for the show sub-cli. Signed-off-by: Anand Jain --- btrfs-list.c | 38 ++++++++++++++++++++++++++++++++++++++ btrfs-list.h | 1 + 2 files changed, 39 insertions(+) diff --git a/btrfs-list.c b/btrfs-list.c index 909d814..0ee13b6 100644 --- a/btrfs-list.c +++ b/btrfs-list.c @@ -1453,6 +1453,44 @@ int btrfs_list_subvols_print(int fd, struct btrfs_list_filter_set *filter_set, return 0; } +int btrfs_get_subvol(int fd, struct root_info *the_ri) +{ + int ret = -1; + struct root_lookup rl; + struct rb_node *rbn; + struct root_info *ri; + u64 root_id = btrfs_list_get_path_rootid(fd); + + if (btrfs_list_subvols(fd, &rl)) + return 1; + + rbn = rb_first(&rl.root); + while(rbn) { + ri = rb_entry(rbn, struct root_info, rb_node); + resolve_root(&rl, ri, root_id); + if (!comp_entry_with_rootid(the_ri, ri, 0)) { + memcpy(the_ri, ri, offsetof(struct root_info, path)); + if (ri->path) + the_ri->path = strdup(ri->path); + else + the_ri->path = NULL; + if (ri->name) + the_ri->name = strdup(ri->name); + else + the_ri->name = NULL; + if (ri->full_path) + the_ri->full_path = strdup(ri->full_path); + else + the_ri->name = NULL; + ret = 0; + break; + } + rbn = rb_next(rbn); + } + __free_all_subvolumn(&rl); + return ret; +} + static int print_one_extent(int fd, struct btrfs_ioctl_search_header *sh, struct btrfs_file_extent_item *item, u64 found_gen, u64 *cache_dirid, diff --git a/btrfs-list.h b/btrfs-list.h index 3b7b680..580d4d1 100644 --- a/btrfs-list.h +++ b/btrfs-list.h @@ -151,3 +151,4 @@ int btrfs_list_find_updated_files(int fd, u64 root_id, u64 oldest_gen); int btrfs_list_get_default_subvolume(int fd, u64 *default_id); char *btrfs_list_path_for_root(int fd, u64 root); u64 btrfs_list_get_path_rootid(int fd); +int btrfs_get_subvol(int fd, struct root_info *the_ri);