From patchwork Wed Jun 26 08:37:23 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anand Jain X-Patchwork-Id: 11017255 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AACFA76 for ; Wed, 26 Jun 2019 08:37:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9B12228672 for ; Wed, 26 Jun 2019 08:37:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8F9FD286C8; Wed, 26 Jun 2019 08:37:38 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 37EC228672 for ; Wed, 26 Jun 2019 08:37:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726329AbfFZIhh (ORCPT ); Wed, 26 Jun 2019 04:37:37 -0400 Received: from aserp2120.oracle.com ([141.146.126.78]:36188 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725379AbfFZIhh (ORCPT ); Wed, 26 Jun 2019 04:37:37 -0400 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x5Q8XTai094511 for ; Wed, 26 Jun 2019 08:37:35 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 : mime-version : content-transfer-encoding; s=corp-2018-07-02; bh=6xsjW0a6Mh130bz9FEHliziANLE3HUWx6kVGTVzsq1s=; b=CelM7N1LMB+cUebkp6FnTYboVjdFQs0nxzgezK/NJCTTFAuxSJJRiYrbHaEoeyiesjqq hQJFAnbFgOxH3PQoZND+7PTwNjG/ZtG2/IxfPTCK7scLjcjeXVvAnojUK8v03iiOlr+W cokcMPGEM7YUGSBVnqraxEFGxAWoGizXPDGlDYJp0QXI9cdJ2oKqojSLZxCXgoJ11M8I UiGDaRB6pur4oqfBM6CK7rWD+OwzjxOvE1IGfmAkwIN4kUY1GyZLSbv2zZcowU3haGQ1 04TXU5XEG9AKMjZrQ+DNTdA5D8BJQa/se166R3LdFP88Nfa+CHblDcI4Yb+2fyxRaYL7 Aw== Received: from aserp3020.oracle.com (aserp3020.oracle.com [141.146.126.70]) by aserp2120.oracle.com with ESMTP id 2t9c9prus8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Wed, 26 Jun 2019 08:37:35 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x5Q8bZZR035918 for ; Wed, 26 Jun 2019 08:37:35 GMT Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by aserp3020.oracle.com with ESMTP id 2t9p6unmbu-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Wed, 26 Jun 2019 08:37:30 +0000 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 x5Q8bT85003963 for ; Wed, 26 Jun 2019 08:37:29 GMT Received: from mb.wifi.oracle.com (/192.188.170.109) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 26 Jun 2019 01:37:28 -0700 From: Anand Jain To: linux-btrfs@vger.kernel.org Subject: [PATCH 2/2 RESEND Rebased] btrfs-progs: add readmirror policy Date: Wed, 26 Jun 2019 16:37:23 +0800 Message-Id: <20190626083723.2094-2-anand.jain@oracle.com> X-Mailer: git-send-email 2.20.1 (Apple Git-117) In-Reply-To: <20190626083723.2094-1-anand.jain@oracle.com> References: <20190626083402.1895-1-anand.jain@oracle.com> <20190626083723.2094-1-anand.jain@oracle.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9299 signatures=668687 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=3 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1906260105 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9299 signatures=668687 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-1906260104 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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} };