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module/bdev: add zcopy abilities to virtual bdevs.

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These bdevs claim native support for zcopy operations. They should
actually support them when running on top of a bdev that claims zcopy
support.

For example, if you were to build a part or passthru bdev on top of a
malloc_bdev (which is just for testing primarily) and then try to run
bdevperf on top of that, you will currently get errors. This patch fixes
that problem.

Change-Id: I023557a3a5b1baf177cc29f1cbc1cd391cc67a8a
Signed-off-by: Seth Howell <seth.howell@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/478243
Community-CI: Broadcom SPDK FC-NVMe CI <spdk-ci.pdl@broadcom.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
This commit is contained in:
Seth Howell 2019-12-17 17:00:37 -07:00 committed by Tomasz Zawadzki
parent 912ad8e3aa
commit 1384ad007c
2 changed files with 44 additions and 0 deletions
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16
lib/bdev/part.c
View File

@ -279,6 +279,17 @@ spdk_bdev_part_complete_io(struct spdk_bdev_io *bdev_io, bool success, void *cb_
spdk_bdev_free_io(bdev_io);
}
static void
spdk_bdev_part_complete_zcopy_io(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
{
struct spdk_bdev_io *part_io = cb_arg;
int status = success ? SPDK_BDEV_IO_STATUS_SUCCESS : SPDK_BDEV_IO_STATUS_FAILED;
spdk_bdev_io_set_buf(part_io, bdev_io->u.bdev.iovs[0].iov_base, bdev_io->u.bdev.iovs[0].iov_len);
spdk_bdev_io_complete(part_io, status);
spdk_bdev_free_io(bdev_io);
}
int
spdk_bdev_part_submit_request(struct spdk_bdev_part_channel *ch, struct spdk_bdev_io *bdev_io)
{
@ -347,6 +358,11 @@ spdk_bdev_part_submit_request(struct spdk_bdev_part_channel *ch, struct spdk_bde
rc = spdk_bdev_reset(base_desc, base_ch,
spdk_bdev_part_complete_io, bdev_io);
break;
case SPDK_BDEV_IO_TYPE_ZCOPY:
rc = spdk_bdev_zcopy_start(base_desc, base_ch, remapped_offset,
bdev_io->u.bdev.num_blocks, bdev_io->u.bdev.zcopy.populate,
spdk_bdev_part_complete_zcopy_io, bdev_io);
break;
default:
SPDK_ERRLOG("unknown I/O type %d\n", bdev_io->type);
return SPDK_BDEV_IO_STATUS_FAILED;

28
module/bdev/passthru/vbdev_passthru.c
View File

@ -179,6 +179,29 @@ _pt_complete_io(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
spdk_bdev_free_io(bdev_io);
}
static void
_pt_complete_zcopy_io(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
{
struct spdk_bdev_io *orig_io = cb_arg;
int status = success ? SPDK_BDEV_IO_STATUS_SUCCESS : SPDK_BDEV_IO_STATUS_FAILED;
struct passthru_bdev_io *io_ctx = (struct passthru_bdev_io *)orig_io->driver_ctx;
/* We setup this value in the submission routine, just showing here that it is
* passed back to us.
*/
if (io_ctx->test != 0x5a) {
SPDK_ERRLOG("Error, original IO device_ctx is wrong! 0x%x\n",
io_ctx->test);
}
/* Complete the original IO and then free the one that we created here
* as a result of issuing an IO via submit_request.
*/
spdk_bdev_io_set_buf(orig_io, bdev_io->u.bdev.iovs[0].iov_base, bdev_io->u.bdev.iovs[0].iov_len);
spdk_bdev_io_complete(orig_io, status);
spdk_bdev_free_io(bdev_io);
}
static void
vbdev_passthru_resubmit_io(void *arg)
{
@ -310,6 +333,11 @@ vbdev_passthru_submit_request(struct spdk_io_channel *ch, struct spdk_bdev_io *b
rc = spdk_bdev_reset(pt_node->base_desc, pt_ch->base_ch,
_pt_complete_io, bdev_io);
break;
case SPDK_BDEV_IO_TYPE_ZCOPY:
rc = spdk_bdev_zcopy_start(pt_node->base_desc, pt_ch->base_ch, bdev_io->u.bdev.offset_blocks,
bdev_io->u.bdev.num_blocks, bdev_io->u.bdev.zcopy.populate,
_pt_complete_zcopy_io, bdev_io);
break;
default:
SPDK_ERRLOG("passthru: unknown I/O type %d\n", bdev_io->type);
spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_FAILED);