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| author | Toshi Kani <toshi.kani@hpe.com> | 2016-06-24 12:23:30 -0600 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2016-07-20 23:49:51 -0400 |
| commit | beec25b4573bc310f5a12cf33207b20ecc30945c (patch) | |
| tree | 849ccb24756e46b0d37a3cacc65331698e725732 /drivers/md/dm-stripe.c | |
| parent | f8df1fdf18839cb4ef2035310bb9b6ec02025598 (diff) | |
| download | linux-beec25b4573bc310f5a12cf33207b20ecc30945c.tar.bz2 | |
dm stripe: add DAX support
Change dm-stripe to implement direct_access function,
stripe_direct_access(), which maps bdev and 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 'drivers/md/dm-stripe.c')
| -rw-r--r-- | drivers/md/dm-stripe.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c index 48f1c01d7b9f..01bb9cf2a8c2 100644 --- a/drivers/md/dm-stripe.c +++ b/drivers/md/dm-stripe.c @@ -308,6 +308,29 @@ static int stripe_map(struct dm_target *ti, struct bio *bio) return DM_MAPIO_REMAPPED; } +static long stripe_direct_access(struct dm_target *ti, sector_t sector, + void __pmem **kaddr, pfn_t *pfn, long size) +{ + struct stripe_c *sc = ti->private; + uint32_t stripe; + struct block_device *bdev; + struct blk_dax_ctl dax = { + .size = size, + }; + long ret; + + stripe_map_sector(sc, sector, &stripe, &dax.sector); + + dax.sector += sc->stripe[stripe].physical_start; + bdev = sc->stripe[stripe].dev->bdev; + + ret = bdev_direct_access(bdev, &dax); + *kaddr = dax.addr; + *pfn = dax.pfn; + + return ret; +} + /* * Stripe status: * @@ -416,7 +439,7 @@ static void stripe_io_hints(struct dm_target *ti, static struct target_type stripe_target = { .name = "striped", - .version = {1, 5, 1}, + .version = {1, 6, 0}, .module = THIS_MODULE, .ctr = stripe_ctr, .dtr = stripe_dtr, @@ -425,6 +448,7 @@ static struct target_type stripe_target = { .status = stripe_status, .iterate_devices = stripe_iterate_devices, .io_hints = stripe_io_hints, + .direct_access = stripe_direct_access, }; int __init dm_stripe_init(void) |