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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=ham 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 90474C43381 for ; Tue, 19 Mar 2019 10:02:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5870820857 for ; Tue, 19 Mar 2019 10:02:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="gBHgJQKu" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727599AbfCSKCB (ORCPT ); Tue, 19 Mar 2019 06:02:01 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:37030 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727500AbfCSKCA (ORCPT ); Tue, 19 Mar 2019 06:02:00 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x2J9wwII193453 for ; Tue, 19 Mar 2019 10:01:59 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : subject : date : message-id : in-reply-to : references; s=corp-2018-07-02; bh=6xsjW0a6Mh130bz9FEHliziANLE3HUWx6kVGTVzsq1s=; b=gBHgJQKuI3j7+uZDMUdzsCOUmJQ2dYknQ6RoY5533IN4iCZMl2PIiWJC2s5T2BvLTTe3 1FVmDv3/KHA46liFVhFnJPsKAuFzo1Js4iP2ynqtgkYXZlu1Vke7FINsBM8On2Npoc7j CryYj5ucLmmJtA3g7GNAik+0ce/uYx8RT/KU5Wo+pGuQ8eVhDKBDO0FU3tccIg3W0XRr Cmx3YeuCCMw665lciklCmNhwLciWVzgLIJA5c0MDuTMqoPWIaaTcXGbNezYbf53ODCoU kYM+R2be+xLtovjUNRGHYMK5iDJgH+FgStWvBrPWsrL7l5ofiD+NL1l5omGIhjSeVfm2 Xg== Received: from userv0021.oracle.com (userv0021.oracle.com [156.151.31.71]) by userp2120.oracle.com with ESMTP id 2r8ssrbgk3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 19 Mar 2019 10:01:59 +0000 Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by userv0021.oracle.com (8.14.4/8.14.4) with ESMTP id x2JA1xqi013510 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 19 Mar 2019 10:01:59 GMT Received: from abhmp0011.oracle.com (abhmp0011.oracle.com [141.146.116.17]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id x2JA1wrx019967 for ; Tue, 19 Mar 2019 10:01:58 GMT Received: from tpasj.wifi.oracle.com (/192.188.170.109) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 19 Mar 2019 03:01:58 -0700 From: Anand Jain To: linux-btrfs@vger.kernel.org Subject: [PATCH RFC 2/2] btrfs-progs: add readmirror policy Date: Tue, 19 Mar 2019 18:02:12 +0800 Message-Id: <1552989732-30310-2-git-send-email-anand.jain@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1552989732-30310-1-git-send-email-anand.jain@oracle.com> References: <1552989624-29577-1-git-send-email-anand.jain@oracle.com> <1552989732-30310-1-git-send-email-anand.jain@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9199 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=3 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1903190076 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org This sets the readmirror= as a btrfs. extentded attribute. Signed-off-by: Anand Jain --- props.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) diff --git a/props.c b/props.c index 3a498bd9e904..1d1a2c7f9d14 100644 --- a/props.c +++ b/props.c @@ -178,6 +178,53 @@ out: return ret; } +static int prop_readmirror(enum prop_object_type type, const char *object, + const char *name, const char *value) +{ + int fd; + int ret; + char buf[256] = {0}; + char *xattr_name; + DIR *dirstream = NULL; + + fd = open_file_or_dir3(object, &dirstream, value ? O_RDWR : O_RDONLY); + if (fd < 0) { + ret = -errno; + error("failed to open %s: %m", object); + return ret; + } + + xattr_name = alloc_xattr_name(name); + if (IS_ERR(xattr_name)) { + error("failed to alloc xattr_name %s: %m", object); + return PTR_ERR(xattr_name); + } + + ret = 0; + if (value) { + if (fsetxattr(fd, xattr_name, value, strlen(value), 0) < 0) { + ret = -errno; + error("failed to set readmirror for %s: %m", object); + } + } else { + if (fgetxattr(fd, xattr_name, buf, 256) < 0) { + if (errno != ENOATTR) { + ret = -errno; + error("failed to get readmirror for %s: %m", + object); + } + } else { + fprintf(stdout, "readmirror=%.*s\n", (int) strlen(buf), + buf); + } + } + + free(xattr_name); + close_file_or_dir(fd, dirstream); + + return ret; +} + const struct prop_handler prop_handlers[] = { {"ro", "Set/get read-only flag of subvolume.", 0, prop_object_subvol, prop_read_only}, @@ -185,5 +232,7 @@ const struct prop_handler prop_handlers[] = { prop_object_dev | prop_object_root, prop_label}, {"compression", "Set/get compression for a file or directory", 0, prop_object_inode, prop_compression}, + {"readmirror", "set/get readmirror policy for filesystem", 0, + prop_object_root, prop_readmirror}, {NULL, NULL, 0, 0, NULL} }; -- 1.8.3.1