From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com ([209.132.183.28]:44652 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964830AbcDLQnG (ORCPT ); Tue, 12 Apr 2016 12:43:06 -0400 From: Brian Foster To: xfs@oss.sgi.com Cc: linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, dm-devel@redhat.com, Mike Snitzer Subject: [RFC v2 PATCH 04/10] dm: add methods to set and get reserved space Date: Tue, 12 Apr 2016 12:42:47 -0400 Message-Id: <1460479373-63317-5-git-send-email-bfoster@redhat.com> In-Reply-To: <1460479373-63317-1-git-send-email-bfoster@redhat.com> References: <1460479373-63317-1-git-send-email-bfoster@redhat.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: From: Mike Snitzer [BF: Condensed to single function.] Signed-off-by: Mike Snitzer --- drivers/md/dm.c | 41 +++++++++++++++++++++++++++++++++++++++++ include/linux/device-mapper.h | 5 +++++ 2 files changed, 46 insertions(+) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index be49057..8f95e78 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -664,6 +664,46 @@ out: return r; } +/* + * FIXME: factor out common helper that can be used by + * multiple block_device_operations -> target methods + * (including dm_blk_ioctl above) + */ + +static int dm_blk_reserve_space(struct block_device *bdev, int mode, + sector_t offset, sector_t len, sector_t *res) +{ + struct mapped_device *md = bdev->bd_disk->private_data; + int srcu_idx; + struct dm_table *map; + struct dm_target *tgt; + int r = -EINVAL; + + map = dm_get_live_table(md, &srcu_idx); + + if (!map || !dm_table_get_size(map)) + goto out; + + /* We only support devices that have a single target */ + if (dm_table_get_num_targets(map) != 1) + goto out; + + tgt = dm_table_get_target(map, 0); + if (!tgt->type->reserve_space) + goto out; + + if (dm_suspended_md(md)) { + r = -EAGAIN; + goto out; + } + + r = tgt->type->reserve_space(tgt, mode, offset, len, res); +out: + dm_put_live_table(md, srcu_idx); + + return r; +} + static struct dm_io *alloc_io(struct mapped_device *md) { return mempool_alloc(md->io_pool, GFP_NOIO); @@ -3723,6 +3763,7 @@ static const struct block_device_operations dm_blk_dops = { .ioctl = dm_blk_ioctl, .getgeo = dm_blk_getgeo, .pr_ops = &dm_pr_ops, + .reserve_space = dm_blk_reserve_space, .owner = THIS_MODULE }; diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index 0830c9e..b4825db 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -116,6 +116,10 @@ typedef void (*dm_io_hints_fn) (struct dm_target *ti, */ typedef int (*dm_busy_fn) (struct dm_target *ti); +typedef int (*dm_reserve_space_fn) (struct dm_target *ti, int mode, + sector_t offset, sector_t len, + sector_t *res); + void dm_error(const char *message); struct dm_dev { @@ -162,6 +166,7 @@ struct target_type { dm_busy_fn busy; dm_iterate_devices_fn iterate_devices; dm_io_hints_fn io_hints; + dm_reserve_space_fn reserve_space; /* For internal device-mapper use. */ struct list_head list; -- 2.4.11 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (Postfix) with ESMTP id 08DA57CA0 for ; Tue, 12 Apr 2016 11:42:57 -0500 (CDT) Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by relay2.corp.sgi.com (Postfix) with ESMTP id CC97D30406B for ; Tue, 12 Apr 2016 09:42:56 -0700 (PDT) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id A9sdyN7gFcoIVCyg (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Tue, 12 Apr 2016 09:42:55 -0700 (PDT) From: Brian Foster Subject: [RFC v2 PATCH 04/10] dm: add methods to set and get reserved space Date: Tue, 12 Apr 2016 12:42:47 -0400 Message-Id: <1460479373-63317-5-git-send-email-bfoster@redhat.com> In-Reply-To: <1460479373-63317-1-git-send-email-bfoster@redhat.com> References: <1460479373-63317-1-git-send-email-bfoster@redhat.com> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: xfs@oss.sgi.com Cc: linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, dm-devel@redhat.com, Mike Snitzer From: Mike Snitzer [BF: Condensed to single function.] Signed-off-by: Mike Snitzer --- drivers/md/dm.c | 41 +++++++++++++++++++++++++++++++++++++++++ include/linux/device-mapper.h | 5 +++++ 2 files changed, 46 insertions(+) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index be49057..8f95e78 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -664,6 +664,46 @@ out: return r; } +/* + * FIXME: factor out common helper that can be used by + * multiple block_device_operations -> target methods + * (including dm_blk_ioctl above) + */ + +static int dm_blk_reserve_space(struct block_device *bdev, int mode, + sector_t offset, sector_t len, sector_t *res) +{ + struct mapped_device *md = bdev->bd_disk->private_data; + int srcu_idx; + struct dm_table *map; + struct dm_target *tgt; + int r = -EINVAL; + + map = dm_get_live_table(md, &srcu_idx); + + if (!map || !dm_table_get_size(map)) + goto out; + + /* We only support devices that have a single target */ + if (dm_table_get_num_targets(map) != 1) + goto out; + + tgt = dm_table_get_target(map, 0); + if (!tgt->type->reserve_space) + goto out; + + if (dm_suspended_md(md)) { + r = -EAGAIN; + goto out; + } + + r = tgt->type->reserve_space(tgt, mode, offset, len, res); +out: + dm_put_live_table(md, srcu_idx); + + return r; +} + static struct dm_io *alloc_io(struct mapped_device *md) { return mempool_alloc(md->io_pool, GFP_NOIO); @@ -3723,6 +3763,7 @@ static const struct block_device_operations dm_blk_dops = { .ioctl = dm_blk_ioctl, .getgeo = dm_blk_getgeo, .pr_ops = &dm_pr_ops, + .reserve_space = dm_blk_reserve_space, .owner = THIS_MODULE }; diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index 0830c9e..b4825db 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -116,6 +116,10 @@ typedef void (*dm_io_hints_fn) (struct dm_target *ti, */ typedef int (*dm_busy_fn) (struct dm_target *ti); +typedef int (*dm_reserve_space_fn) (struct dm_target *ti, int mode, + sector_t offset, sector_t len, + sector_t *res); + void dm_error(const char *message); struct dm_dev { @@ -162,6 +166,7 @@ struct target_type { dm_busy_fn busy; dm_iterate_devices_fn iterate_devices; dm_io_hints_fn io_hints; + dm_reserve_space_fn reserve_space; /* For internal device-mapper use. */ struct list_head list; -- 2.4.11 _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs