From patchwork Fri Oct 12 05:20:53 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anand Jain X-Patchwork-Id: 1585301 Return-Path: X-Original-To: patchwork-linux-btrfs@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id 0B38340276 for ; Fri, 12 Oct 2012 05:17:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932749Ab2JLFRl (ORCPT ); Fri, 12 Oct 2012 01:17:41 -0400 Received: from acsinet15.oracle.com ([141.146.126.227]:19340 "EHLO acsinet15.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932417Ab2JLFRj (ORCPT ); Fri, 12 Oct 2012 01:17:39 -0400 Received: from acsinet22.oracle.com (acsinet22.oracle.com [141.146.126.238]) by acsinet15.oracle.com (Sentrion-MTA-4.2.2/Sentrion-MTA-4.2.2) with ESMTP id q9C5HbSU002059 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Fri, 12 Oct 2012 05:17:38 GMT Received: from acsmt356.oracle.com (acsmt356.oracle.com [141.146.40.156]) by acsinet22.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id q9C5HbMQ011116 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 12 Oct 2012 05:17:37 GMT Received: from abhmt109.oracle.com (abhmt109.oracle.com [141.146.116.61]) by acsmt356.oracle.com (8.12.11.20060308/8.12.11) with ESMTP id q9C5HbW2015328 for ; Fri, 12 Oct 2012 00:17:37 -0500 Received: from localhost.localdomain (/10.186.101.18) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 11 Oct 2012 22:17:36 -0700 From: Anand jain To: linux-btrfs@vger.kernel.org Cc: Anand Jain Subject: [PATCH 3/4] Btrfs-progs: method to fetch root info for subvol Date: Fri, 12 Oct 2012 13:20:53 +0800 Message-Id: <1350019254-22036-4-git-send-email-Anand.Jain@oracle.com> X-Mailer: git-send-email 1.7.7 In-Reply-To: <1350019254-22036-1-git-send-email-Anand.Jain@oracle.com> References: <1350019254-22036-1-git-send-email-Anand.Jain@oracle.com> X-Source-IP: acsinet22.oracle.com [141.146.126.238] Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org From: Anand Jain Signed-off-by: Anand Jain --- btrfs-list.c | 37 +++++++++++++++++++++++++++++++++++++ btrfs-list.h | 1 + 2 files changed, 38 insertions(+), 0 deletions(-) diff --git a/btrfs-list.c b/btrfs-list.c index c0407c9..5eada92 100644 --- a/btrfs-list.c +++ b/btrfs-list.c @@ -1296,6 +1296,43 @@ static int btrfs_get_subvols(int fd, struct root_lookup *root_lookup) return ret; } +int btrfs_get_a_subvol(int fd, struct root_info *the_ri) +{ + int ret = -1; + struct root_lookup rl; + struct rb_node *rbn; + struct root_info *ri; + u64 top_id = btrfs_list_get_path_rootid(fd); + + if (btrfs_get_subvols(fd, &rl)) + return 13; + + rbn = rb_first(&rl.root); + while(rbn) { + ri = rb_entry(rbn, struct root_info, rb_node); + resolve_root(&rl, ri, top_id); + if (!comp_entry_with_path(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; + } + rbn = rb_next(rbn); + } + __free_all_subvolumn(&rl); + return ret; +} + static void print_subvolume_column(struct root_info *subv, enum btrfs_list_column_enum column) { diff --git a/btrfs-list.h b/btrfs-list.h index bd5e23a..fc04f05 100644 --- a/btrfs-list.h +++ b/btrfs-list.h @@ -152,3 +152,4 @@ 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_a_subvol(int fd, struct root_info *the_ri);