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| author |   Toshi Kani <toshi.kani@hpe.com> | 2016-06-22 17:54:54 -0600 |
|---|---|---|
| committer |   Mike Snitzer <snitzer@redhat.com> | 2016-07-20 23:49:49 -0400 |
| commit | 84b22f8378cf493524043a0a8dd567c58c64546f (patch) | |
| tree | 875436c2bf200ce6ca5a70c0a6426926a8386176 /drivers/md | |
| parent | dm: add infrastructure for DAX support (diff) | |
| download | linux-dev-84b22f8378cf493524043a0a8dd567c58c64546f.tar.xz linux-dev-84b22f8378cf493524043a0a8dd567c58c64546f.zip | |
dm linear: add DAX support
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>
Diffstat (limited to '')
| -rw-r--r-- | drivers/md/dm-linear.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c index 05c35aacb3aa..6d35dd4e9efb 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) |