From: Toshi Kani <toshi.kani@hpe.com>
To: snitzer@redhat.com, axboe@kernel.dk, dan.j.williams@intel.com
Cc: linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org,
linux-raid@vger.kernel.org, dm-devel@redhat.com,
viro@zeniv.linux.org.uk, agk@redhat.com
Subject: [PATCH v2 3/3] dm linear: add DAX support
Date: Wed, 22 Jun 2016 17:54:54 -0600 [thread overview]
Message-ID: <1466639694-25394-4-git-send-email-toshi.kani@hpe.com> (raw)
In-Reply-To: <1466639694-25394-1-git-send-email-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.
Change dm-linear to sets 'dax_supported' when its target physical device
supports DAX.
Signed-off-by: Toshi Kani <toshi.kani@hpe.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 | 23 ++++++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c
index 05c35aa..c7fdd1d 100644
--- a/drivers/md/dm-linear.c
+++ b/drivers/md/dm-linear.c
@@ -59,6 +59,8 @@ static int linear_ctr(struct dm_target *ti, unsigned int argc, char **argv)
ti->num_flush_bios = 1;
ti->num_discard_bios = 1;
ti->num_write_same_bios = 1;
+ if (blk_queue_dax(lc->dev->bdev->bd_queue))
+ ti->dax_supported = true;
ti->private = lc;
return 0;
@@ -141,9 +143,27 @@ 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 +171,7 @@ 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)
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WARNING: multiple messages have this Message-ID (diff)
From: Toshi Kani <toshi.kani@hpe.com>
To: snitzer@redhat.com, axboe@kernel.dk, dan.j.williams@intel.com
Cc: agk@redhat.com, ross.zwisler@linux.intel.com,
viro@zeniv.linux.org.uk, toshi.kani@hpe.com,
linux-nvdimm@lists.01.org, dm-devel@redhat.com,
linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 3/3] dm linear: add DAX support
Date: Wed, 22 Jun 2016 17:54:54 -0600 [thread overview]
Message-ID: <1466639694-25394-4-git-send-email-toshi.kani@hpe.com> (raw)
In-Reply-To: <1466639694-25394-1-git-send-email-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.
Change dm-linear to sets 'dax_supported' when its target physical device
supports DAX.
Signed-off-by: Toshi Kani <toshi.kani@hpe.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 | 23 ++++++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c
index 05c35aa..c7fdd1d 100644
--- a/drivers/md/dm-linear.c
+++ b/drivers/md/dm-linear.c
@@ -59,6 +59,8 @@ static int linear_ctr(struct dm_target *ti, unsigned int argc, char **argv)
ti->num_flush_bios = 1;
ti->num_discard_bios = 1;
ti->num_write_same_bios = 1;
+ if (blk_queue_dax(lc->dev->bdev->bd_queue))
+ ti->dax_supported = true;
ti->private = lc;
return 0;
@@ -141,9 +143,27 @@ 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 +171,7 @@ 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)
WARNING: multiple messages have this Message-ID (diff)
From: Toshi Kani <toshi.kani@hpe.com>
To: snitzer@redhat.com, axboe@kernel.dk, dan.j.williams@intel.com
Cc: agk@redhat.com, ross.zwisler@linux.intel.com,
viro@zeniv.linux.org.uk, toshi.kani@hpe.com,
linux-nvdimm@ml01.01.org, dm-devel@redhat.com,
linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 3/3] dm linear: add DAX support
Date: Wed, 22 Jun 2016 17:54:54 -0600 [thread overview]
Message-ID: <1466639694-25394-4-git-send-email-toshi.kani@hpe.com> (raw)
In-Reply-To: <1466639694-25394-1-git-send-email-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.
Change dm-linear to sets 'dax_supported' when its target physical device
supports DAX.
Signed-off-by: Toshi Kani <toshi.kani@hpe.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 | 23 ++++++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c
index 05c35aa..c7fdd1d 100644
--- a/drivers/md/dm-linear.c
+++ b/drivers/md/dm-linear.c
@@ -59,6 +59,8 @@ static int linear_ctr(struct dm_target *ti, unsigned int argc, char **argv)
ti->num_flush_bios = 1;
ti->num_discard_bios = 1;
ti->num_write_same_bios = 1;
+ if (blk_queue_dax(lc->dev->bdev->bd_queue))
+ ti->dax_supported = true;
ti->private = lc;
return 0;
@@ -141,9 +143,27 @@ 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 +171,7 @@ 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)
next prev parent reply other threads:[~2016-06-23 0:05 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-22 23:54 [PATCH v2 0/3] Support DAX for device-mapper dm-linear devices Toshi Kani
2016-06-22 23:54 ` Toshi Kani
2016-06-22 23:54 ` Toshi Kani
2016-06-22 23:54 ` [PATCH v2 1/3] block: add QUEUE_FLAG_DAX for devices to advertise their DAX support Toshi Kani
2016-06-22 23:54 ` Toshi Kani
2016-06-22 23:54 ` Toshi Kani
2016-06-23 16:31 ` Yigal Korman
2016-06-23 16:31 ` Yigal Korman
2016-06-23 16:31 ` Yigal Korman
2016-06-23 17:36 ` Kani, Toshimitsu
2016-06-23 17:36 ` Kani, Toshimitsu
2016-06-23 17:36 ` Kani, Toshimitsu
2016-06-23 18:05 ` Yigal Korman
2016-06-23 18:05 ` Yigal Korman
2016-06-23 18:05 ` Yigal Korman
2016-06-23 18:10 ` Dan Williams
2016-06-23 18:10 ` Dan Williams
2016-06-23 18:10 ` Dan Williams
2016-06-23 21:11 ` Mike Snitzer
2016-06-23 21:11 ` Mike Snitzer
2016-06-23 21:11 ` Mike Snitzer
2016-06-22 23:54 ` [PATCH v2 2/3] dm: add infrastructure for " Toshi Kani
2016-06-22 23:54 ` Toshi Kani
2016-06-22 23:54 ` Toshi Kani
2016-06-22 23:54 ` Toshi Kani [this message]
2016-06-22 23:54 ` [PATCH v2 3/3] dm linear: add " Toshi Kani
2016-06-22 23:54 ` Toshi Kani
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