From patchwork Fri Jul 31 13:36:18 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hannes Reinecke X-Patchwork-Id: 6911571 Return-Path: X-Original-To: patchwork-linux-scsi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 48C53C05AC for ; Fri, 31 Jul 2015 13:38:25 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 69BB120452 for ; Fri, 31 Jul 2015 13:38:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 82F87203B8 for ; Fri, 31 Jul 2015 13:38:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751492AbbGaNgZ (ORCPT ); Fri, 31 Jul 2015 09:36:25 -0400 Received: from mx2.suse.de ([195.135.220.15]:59593 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751180AbbGaNgY (ORCPT ); Fri, 31 Jul 2015 09:36:24 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id F303EADA7; Fri, 31 Jul 2015 13:36:21 +0000 (UTC) From: Hannes Reinecke To: James Bottomley Cc: Christoph Hellwig , linux-scsi@vger.kernel.org, Jens Axboe , linux-kernel@vger.kernel.org, Hannes Reinecke Subject: [PATCH 6/8] block: Add 'zoned' sysfs queue attribute Date: Fri, 31 Jul 2015 15:36:18 +0200 Message-Id: <1438349780-116429-7-git-send-email-hare@suse.de> X-Mailer: git-send-email 1.8.5.2 In-Reply-To: <1438349780-116429-1-git-send-email-hare@suse.de> References: <1438349780-116429-1-git-send-email-hare@suse.de> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Spam-Status: No, score=-8.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add a sysfs queue attribute 'zoned' to display the zone layout for zoned devices. Signed-off-by: Hannes Reinecke --- block/blk-sysfs.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index e419f1f..5e2ba53 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -211,6 +211,43 @@ static ssize_t queue_max_hw_sectors_show(struct request_queue *q, char *page) return queue_var_show(max_hw_sectors_kb, (page)); } +#ifdef CONFIG_BLK_DEV_ZONED +static ssize_t queue_zoned_show(struct request_queue *q, char *page) +{ + struct rb_node *node; + struct blk_zone *zone; + ssize_t offset = 0, end = 0; + int size = 0, num = 0; + enum blk_zone_type type = BLK_ZONE_TYPE_UNKNOWN; + + for (node = rb_first(&q->zones); node; node = rb_next(node)) { + zone = rb_entry(node, struct blk_zone, node); + if (zone->type != type || + zone->len != size || + end != zone->start) { + if (size != 0) + offset += sprintf(page + offset, "%u\n", num); + /* We can only store one page ... */ + if (offset + 42 > PAGE_SIZE) { + offset += sprintf(page + offset, "...\n"); + return offset; + } + size = zone->len; + type = zone->type; + offset += sprintf(page + offset, "%llu %u %d ", + zone->start, size, type); + num = 0; + end = zone->start + size; + } else + end += zone->len; + num++; + } + if (num > 0) + offset += sprintf(page + offset, "%u\n", num); + return offset > 0 ? offset : -EINVAL; +} +#endif + #define QUEUE_SYSFS_BIT_FNS(name, flag, neg) \ static ssize_t \ queue_show_##name(struct request_queue *q, char *page) \ @@ -401,6 +438,13 @@ static struct queue_sysfs_entry queue_write_same_max_entry = { .show = queue_write_same_max_show, }; +#ifdef CONFIG_BLK_DEV_ZONED +static struct queue_sysfs_entry queue_zoned_entry = { + .attr = {.name = "zoned", .mode = S_IRUGO }, + .show = queue_zoned_show, +}; +#endif + static struct queue_sysfs_entry queue_nonrot_entry = { .attr = {.name = "rotational", .mode = S_IRUGO | S_IWUSR }, .show = queue_show_nonrot, @@ -451,6 +495,9 @@ static struct attribute *default_attrs[] = { &queue_discard_zeroes_data_entry.attr, &queue_write_same_max_entry.attr, &queue_nonrot_entry.attr, +#ifdef CONFIG_BLK_DEV_ZONED + &queue_zoned_entry.attr, +#endif &queue_nomerges_entry.attr, &queue_rq_affinity_entry.attr, &queue_iostats_entry.attr,