From: Mike Snitzer <snitzer-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> To: axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org, toshi.kani-ZPxbGqLxI0U@public.gmane.org, dan.j.williams-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org Cc: linux-nvdimm-y27Ovi1pjclAfugRpC6u6w@public.gmane.org, dm-devel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, viro-RmSDqhL/yNMiFSDQTTA3OLVCufUGDwFn@public.gmane.org Subject: [PATCH v3 4/4] dm linear: add DAX support Date: Thu, 23 Jun 2016 17:05:53 -0400 [thread overview] Message-ID: <1466715953-40692-5-git-send-email-snitzer@redhat.com> (raw) In-Reply-To: <1466715953-40692-1-git-send-email-snitzer-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> From: Toshi Kani <toshi.kani-ZPxbGqLxI0U@public.gmane.org> Change dm-linear to implement direct_access function, linear_direct_access(), which maps sector and calls direct_access function of its physical target device. Signed-off-by: Toshi Kani <toshi.kani-ZPxbGqLxI0U@public.gmane.org> Signed-off-by: Mike Snitzer <snitzer-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> Cc: Alasdair Kergon <agk-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> Cc: Dan Williams <dan.j.williams-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> Cc: Ross Zwisler <ross.zwisler-VuQAYsv1563Yd54FQh9/CA@public.gmane.org> --- drivers/md/dm-linear.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c index 05c35aa..6d35dd4 100644 --- a/drivers/md/dm-linear.c +++ b/drivers/md/dm-linear.c @@ -141,9 +141,27 @@ static int linear_iterate_devices(struct dm_target *ti, return fn(ti, lc->dev, lc->start, ti->len, data); } +static long linear_direct_access(struct dm_target *ti, sector_t sector, + void __pmem **kaddr, pfn_t *pfn, long size) +{ + struct linear_c *lc = ti->private; + struct block_device *bdev = lc->dev->bdev; + struct blk_dax_ctl dax = { + .sector = linear_map_sector(ti, sector), + .size = size, + }; + long ret; + + ret = bdev_direct_access(bdev, &dax); + *kaddr = dax.addr; + *pfn = dax.pfn; + + return ret; +} + static struct target_type linear_target = { .name = "linear", - .version = {1, 2, 1}, + .version = {1, 3, 0}, .module = THIS_MODULE, .ctr = linear_ctr, .dtr = linear_dtr, @@ -151,6 +169,7 @@ static struct target_type linear_target = { .status = linear_status, .prepare_ioctl = linear_prepare_ioctl, .iterate_devices = linear_iterate_devices, + .direct_access = linear_direct_access, }; int __init dm_linear_init(void) -- 2.7.4 (Apple Git-66)
WARNING: multiple messages have this Message-ID (diff)
From: Mike Snitzer <snitzer@redhat.com> To: axboe@kernel.dk, toshi.kani@hpe.com, dan.j.williams@intel.com Cc: ross.zwisler@linux.intel.com, viro@zeniv.linux.org.uk, linux-nvdimm@ml01.01.org, dm-devel@redhat.com, linux-kernel@vger.kernel.org, yigal@plexistor.com Subject: [PATCH v3 4/4] dm linear: add DAX support Date: Thu, 23 Jun 2016 17:05:53 -0400 [thread overview] Message-ID: <1466715953-40692-5-git-send-email-snitzer@redhat.com> (raw) In-Reply-To: <1466715953-40692-1-git-send-email-snitzer@redhat.com> From: Toshi Kani <toshi.kani@hpe.com> Change dm-linear to implement direct_access function, linear_direct_access(), which maps sector and calls direct_access function of its physical target device. Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Cc: Alasdair Kergon <agk@redhat.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> --- drivers/md/dm-linear.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c index 05c35aa..6d35dd4 100644 --- a/drivers/md/dm-linear.c +++ b/drivers/md/dm-linear.c @@ -141,9 +141,27 @@ static int linear_iterate_devices(struct dm_target *ti, return fn(ti, lc->dev, lc->start, ti->len, data); } +static long linear_direct_access(struct dm_target *ti, sector_t sector, + void __pmem **kaddr, pfn_t *pfn, long size) +{ + struct linear_c *lc = ti->private; + struct block_device *bdev = lc->dev->bdev; + struct blk_dax_ctl dax = { + .sector = linear_map_sector(ti, sector), + .size = size, + }; + long ret; + + ret = bdev_direct_access(bdev, &dax); + *kaddr = dax.addr; + *pfn = dax.pfn; + + return ret; +} + static struct target_type linear_target = { .name = "linear", - .version = {1, 2, 1}, + .version = {1, 3, 0}, .module = THIS_MODULE, .ctr = linear_ctr, .dtr = linear_dtr, @@ -151,6 +169,7 @@ static struct target_type linear_target = { .status = linear_status, .prepare_ioctl = linear_prepare_ioctl, .iterate_devices = linear_iterate_devices, + .direct_access = linear_direct_access, }; int __init dm_linear_init(void) -- 2.7.4 (Apple Git-66)
next prev parent reply other threads:[~2016-06-23 21:05 UTC|newest] Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-06-23 21:05 [PATCH v3 0/4] Support DAX for device-mapper linear devices Mike Snitzer 2016-06-23 21:05 ` Mike Snitzer [not found] ` <1466715953-40692-1-git-send-email-snitzer-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> 2016-06-23 21:05 ` [PATCH v3 1/4] block: add QUEUE_FLAG_DAX for devices to advertise their DAX support Mike Snitzer 2016-06-23 21:05 ` Mike Snitzer 2016-06-23 21:05 ` [PATCH v3 2/4] block: expose QUEUE_FLAG_DAX in sysfs Mike Snitzer 2016-06-23 21:05 ` Mike Snitzer 2016-06-23 21:05 ` [PATCH v3 3/4] dm: add infrastructure for DAX support Mike Snitzer 2016-06-23 21:05 ` Mike Snitzer [not found] ` <1466715953-40692-4-git-send-email-snitzer-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> 2016-06-23 23:36 ` Kani, Toshimitsu 2016-06-23 23:36 ` Kani, Toshimitsu [not found] ` <1466724984.3504.380.camel-ZPxbGqLxI0U@public.gmane.org> 2016-06-24 1:49 ` Mike Snitzer 2016-06-24 1:49 ` Mike Snitzer [not found] ` <20160624014930.GA10540-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> 2016-06-24 15:40 ` Kani, Toshimitsu 2016-06-24 15:40 ` Kani, Toshimitsu [not found] ` <1466782822.3504.391.camel-ZPxbGqLxI0U@public.gmane.org> 2016-06-24 15:44 ` Mike Snitzer 2016-06-24 15:44 ` Mike Snitzer [not found] ` <20160624154446.GB13898-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> 2016-06-24 15:56 ` Kani, Toshimitsu 2016-06-24 15:56 ` Kani, Toshimitsu 2016-06-23 21:05 ` Mike Snitzer [this message] 2016-06-23 21:05 ` [PATCH v3 4/4] dm linear: add " Mike Snitzer 2016-06-30 17:00 ` [PATCH v3 0/4] Support DAX for device-mapper linear devices Mike Snitzer 2016-06-30 17:00 ` Mike Snitzer [not found] ` <20160630170053.GA20750-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> 2016-07-08 19:30 ` Mike Snitzer 2016-07-08 19:30 ` Mike Snitzer
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=1466715953-40692-5-git-send-email-snitzer@redhat.com \ --to=snitzer-h+wxahxf7alqt0dzr+alfa@public.gmane.org \ --cc=axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org \ --cc=dan.j.williams-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org \ --cc=dm-devel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org \ --cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \ --cc=linux-nvdimm-y27Ovi1pjclAfugRpC6u6w@public.gmane.org \ --cc=toshi.kani-ZPxbGqLxI0U@public.gmane.org \ --cc=viro-RmSDqhL/yNMiFSDQTTA3OLVCufUGDwFn@public.gmane.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.