From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934100AbcI3TOM (ORCPT ); Fri, 30 Sep 2016 15:14:12 -0400 Received: from mail-it0-f68.google.com ([209.85.214.68]:36677 "EHLO mail-it0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934011AbcI3TN6 (ORCPT ); Fri, 30 Sep 2016 15:13:58 -0400 From: Shaun Tancheff To: Jens Axboe Cc: Hannes Reinecke , linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Christoph Hellwig , "Martin K . Petersen" , "James E . J . Bottomley" , Damien Le Moal , Michael T Lombardi Subject: [PATCH v6 2/7] blk-sysfs: Add 'chunk_sectors' to sysfs attributes Date: Fri, 30 Sep 2016 14:12:31 -0500 Message-Id: <20160930191237.13695-3-shaun@tancheff.com> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20160930191237.13695-1-shaun@tancheff.com> References: <20160930191237.13695-1-shaun@tancheff.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Hannes Reinecke The queue limits already have a 'chunk_sectors' setting, so we should be presenting it via sysfs. Signed-off-by: Hannes Reinecke [Damien: Updated Documentation/ABI/testing/sysfs-block] Signed-off-by: Damien Le Moal Reviewed-by: Christoph Hellwig Reviewed-by: Martin K. Petersen Reviewed-by: Shaun Tancheff Tested-by: Shaun Tancheff --- Documentation/ABI/testing/sysfs-block | 13 +++++++++++++ block/blk-sysfs.c | 11 +++++++++++ 2 files changed, 24 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-block b/Documentation/ABI/testing/sysfs-block index 75a5055..ee2d5cd 100644 --- a/Documentation/ABI/testing/sysfs-block +++ b/Documentation/ABI/testing/sysfs-block @@ -251,3 +251,16 @@ Description: since drive-managed zoned block devices do not support zone commands, they will be treated as regular block devices and zoned will report "none". + +What: /sys/block//queue/chunk_sectors +Date: September 2016 +Contact: Hannes Reinecke +Description: + chunk_sectors has different meaning depending on the type + of the disk. For a RAID device (dm-raid), chunk_sectors + indicates the size in 512B sectors of the RAID volume + stripe segment. For a zoned block device, either + host-aware or host-managed, chunk_sectors indicates the + size of 512B sectors of the zones of the device, with + the eventual exception of the last zone of the device + which may be smaller. diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index ff9cd9c..488c2e2 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -130,6 +130,11 @@ static ssize_t queue_physical_block_size_show(struct request_queue *q, char *pag return queue_var_show(queue_physical_block_size(q), page); } +static ssize_t queue_chunk_sectors_show(struct request_queue *q, char *page) +{ + return queue_var_show(q->limits.chunk_sectors, page); +} + static ssize_t queue_io_min_show(struct request_queue *q, char *page) { return queue_var_show(queue_io_min(q), page); @@ -455,6 +460,11 @@ static struct queue_sysfs_entry queue_physical_block_size_entry = { .show = queue_physical_block_size_show, }; +static struct queue_sysfs_entry queue_chunk_sectors_entry = { + .attr = {.name = "chunk_sectors", .mode = S_IRUGO }, + .show = queue_chunk_sectors_show, +}; + static struct queue_sysfs_entry queue_io_min_entry = { .attr = {.name = "minimum_io_size", .mode = S_IRUGO }, .show = queue_io_min_show, @@ -555,6 +565,7 @@ static struct attribute *default_attrs[] = { &queue_hw_sector_size_entry.attr, &queue_logical_block_size_entry.attr, &queue_physical_block_size_entry.attr, + &queue_chunk_sectors_entry.attr, &queue_io_min_entry.attr, &queue_io_opt_entry.attr, &queue_discard_granularity_entry.attr, -- 2.9.3