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qemu/hw/nvme/dif.c
Naveen Nagar 44219b6029 hw/nvme: 64-bit pi support 
This adds support for one possible new protection information format
introduced in TP4068 (and integrated in NVMe 2.0): the 64-bit CRC guard
and 48-bit reference tag. This version does not support storage tags.

Like the CRC16 support already present, this uses a software
implementation of CRC64 (so it is naturally pretty slow). But its good
enough for verification purposes.

This may go nicely hand-in-hand with the support that Keith submitted
for the Linux kernel[1].

  [1]: https://lore.kernel.org/linux-nvme/20220126165214.GA1782352@dhcp-10-100-145-180.wdc.com/T/

Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Naveen Nagar <naveen.n1@samsung.com>
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
2022-03-03 09:30:21 +01:00

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/*
* QEMU NVM Express End-to-End Data Protection support
*
* Copyright (c) 2021 Samsung Electronics Co., Ltd.
*
* Authors:
* Klaus Jensen <k.jensen@samsung.com>
* Gollu Appalanaidu <anaidu.gollu@samsung.com>
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "sysemu/block-backend.h"
#include "nvme.h"
#include "dif.h"
#include "trace.h"
uint16_t nvme_check_prinfo(NvmeNamespace *ns, uint8_t prinfo, uint64_t slba,
uint64_t reftag)
{
uint64_t mask = ns->pif ? 0xffffffffffff : 0xffffffff;
if ((NVME_ID_NS_DPS_TYPE(ns->id_ns.dps) == NVME_ID_NS_DPS_TYPE_1) &&
(prinfo & NVME_PRINFO_PRCHK_REF) && (slba & mask) != reftag) {
return NVME_INVALID_PROT_INFO | NVME_DNR;
}
return NVME_SUCCESS;
}
/* from Linux kernel (crypto/crct10dif_common.c) */
static uint16_t crc16_t10dif(uint16_t crc, const unsigned char *buffer,
size_t len)
{
unsigned int i;
for (i = 0; i < len; i++) {
crc = (crc << 8) ^ crc16_t10dif_table[((crc >> 8) ^ buffer[i]) & 0xff];
}
return crc;
}
/* from Linux kernel (lib/crc64.c) */
static uint64_t crc64_nvme(uint64_t crc, const unsigned char *buffer,
size_t len)
{
size_t i;
for (i = 0; i < len; i++) {
crc = (crc >> 8) ^ crc64_nvme_table[(crc & 0xff) ^ buffer[i]];
}
return crc ^ (uint64_t)~0;
}
static void nvme_dif_pract_generate_dif_crc16(NvmeNamespace *ns, uint8_t *buf,
size_t len, uint8_t *mbuf,
size_t mlen, uint16_t apptag,
uint64_t *reftag)
{
uint8_t *end = buf + len;
int16_t pil = 0;
if (!(ns->id_ns.dps & NVME_ID_NS_DPS_FIRST_EIGHT)) {
pil = ns->lbaf.ms - nvme_pi_tuple_size(ns);
}
trace_pci_nvme_dif_pract_generate_dif_crc16(len, ns->lbasz,
ns->lbasz + pil, apptag,
*reftag);
for (; buf < end; buf += ns->lbasz, mbuf += ns->lbaf.ms) {
NvmeDifTuple *dif = (NvmeDifTuple *)(mbuf + pil);
uint16_t crc = crc16_t10dif(0x0, buf, ns->lbasz);
if (pil) {
crc = crc16_t10dif(crc, mbuf, pil);
}
dif->g16.guard = cpu_to_be16(crc);
dif->g16.apptag = cpu_to_be16(apptag);
dif->g16.reftag = cpu_to_be32(*reftag);
if (NVME_ID_NS_DPS_TYPE(ns->id_ns.dps) != NVME_ID_NS_DPS_TYPE_3) {
(*reftag)++;
}
}
}
static void nvme_dif_pract_generate_dif_crc64(NvmeNamespace *ns, uint8_t *buf,
size_t len, uint8_t *mbuf,
size_t mlen, uint16_t apptag,
uint64_t *reftag)
{
uint8_t *end = buf + len;
int16_t pil = 0;
if (!(ns->id_ns.dps & NVME_ID_NS_DPS_FIRST_EIGHT)) {
pil = ns->lbaf.ms - 16;
}
trace_pci_nvme_dif_pract_generate_dif_crc64(len, ns->lbasz,
ns->lbasz + pil, apptag,
*reftag);
for (; buf < end; buf += ns->lbasz, mbuf += ns->lbaf.ms) {
NvmeDifTuple *dif = (NvmeDifTuple *)(mbuf + pil);
uint64_t crc = crc64_nvme(~0ULL, buf, ns->lbasz);
if (pil) {
crc = crc64_nvme(crc, mbuf, pil);
}
dif->g64.guard = cpu_to_be64(crc);
dif->g64.apptag = cpu_to_be16(apptag);
dif->g64.sr[0] = *reftag >> 40;
dif->g64.sr[1] = *reftag >> 32;
dif->g64.sr[2] = *reftag >> 24;
dif->g64.sr[3] = *reftag >> 16;
dif->g64.sr[4] = *reftag >> 8;
dif->g64.sr[5] = *reftag;
if (NVME_ID_NS_DPS_TYPE(ns->id_ns.dps) != NVME_ID_NS_DPS_TYPE_3) {
(*reftag)++;
}
}
}
void nvme_dif_pract_generate_dif(NvmeNamespace *ns, uint8_t *buf, size_t len,
uint8_t *mbuf, size_t mlen, uint16_t apptag,
uint64_t *reftag)
{
switch (ns->pif) {
case NVME_PI_GUARD_16:
return nvme_dif_pract_generate_dif_crc16(ns, buf, len, mbuf, mlen,
apptag, reftag);
case NVME_PI_GUARD_64:
return nvme_dif_pract_generate_dif_crc64(ns, buf, len, mbuf, mlen,
apptag, reftag);
}
abort();
}
static uint16_t nvme_dif_prchk_crc16(NvmeNamespace *ns, NvmeDifTuple *dif,
uint8_t *buf, uint8_t *mbuf, size_t pil,
uint8_t prinfo, uint16_t apptag,
uint16_t appmask, uint64_t reftag)
{
switch (NVME_ID_NS_DPS_TYPE(ns->id_ns.dps)) {
case NVME_ID_NS_DPS_TYPE_3:
if (be32_to_cpu(dif->g16.reftag) != 0xffffffff) {
break;
}
/* fallthrough */
case NVME_ID_NS_DPS_TYPE_1:
case NVME_ID_NS_DPS_TYPE_2:
if (be16_to_cpu(dif->g16.apptag) != 0xffff) {
break;
}
trace_pci_nvme_dif_prchk_disabled_crc16(be16_to_cpu(dif->g16.apptag),
be32_to_cpu(dif->g16.reftag));
return NVME_SUCCESS;
}
if (prinfo & NVME_PRINFO_PRCHK_GUARD) {
uint16_t crc = crc16_t10dif(0x0, buf, ns->lbasz);
if (pil) {
crc = crc16_t10dif(crc, mbuf, pil);
}
trace_pci_nvme_dif_prchk_guard_crc16(be16_to_cpu(dif->g16.guard), crc);
if (be16_to_cpu(dif->g16.guard) != crc) {
return NVME_E2E_GUARD_ERROR;
}
}
if (prinfo & NVME_PRINFO_PRCHK_APP) {
trace_pci_nvme_dif_prchk_apptag(be16_to_cpu(dif->g16.apptag), apptag,
appmask);
if ((be16_to_cpu(dif->g16.apptag) & appmask) != (apptag & appmask)) {
return NVME_E2E_APP_ERROR;
}
}
if (prinfo & NVME_PRINFO_PRCHK_REF) {
trace_pci_nvme_dif_prchk_reftag_crc16(be32_to_cpu(dif->g16.reftag),
reftag);
if (be32_to_cpu(dif->g16.reftag) != reftag) {
return NVME_E2E_REF_ERROR;
}
}
return NVME_SUCCESS;
}
static uint16_t nvme_dif_prchk_crc64(NvmeNamespace *ns, NvmeDifTuple *dif,
uint8_t *buf, uint8_t *mbuf, size_t pil,
uint8_t prinfo, uint16_t apptag,
uint16_t appmask, uint64_t reftag)
{
uint64_t r = 0;
r |= (uint64_t)dif->g64.sr[0] << 40;
r |= (uint64_t)dif->g64.sr[1] << 32;
r |= (uint64_t)dif->g64.sr[2] << 24;
r |= (uint64_t)dif->g64.sr[3] << 16;
r |= (uint64_t)dif->g64.sr[4] << 8;
r |= (uint64_t)dif->g64.sr[5];
switch (NVME_ID_NS_DPS_TYPE(ns->id_ns.dps)) {
case NVME_ID_NS_DPS_TYPE_3:
if (r != 0xffffffffffff) {
break;
}
/* fallthrough */
case NVME_ID_NS_DPS_TYPE_1:
case NVME_ID_NS_DPS_TYPE_2:
if (be16_to_cpu(dif->g64.apptag) != 0xffff) {
break;
}
trace_pci_nvme_dif_prchk_disabled_crc64(be16_to_cpu(dif->g16.apptag),
r);
return NVME_SUCCESS;
}
if (prinfo & NVME_PRINFO_PRCHK_GUARD) {
uint64_t crc = crc64_nvme(~0ULL, buf, ns->lbasz);
if (pil) {
crc = crc64_nvme(crc, mbuf, pil);
}
trace_pci_nvme_dif_prchk_guard_crc64(be64_to_cpu(dif->g64.guard), crc);
if (be64_to_cpu(dif->g64.guard) != crc) {
return NVME_E2E_GUARD_ERROR;
}
}
if (prinfo & NVME_PRINFO_PRCHK_APP) {
trace_pci_nvme_dif_prchk_apptag(be16_to_cpu(dif->g64.apptag), apptag,
appmask);
if ((be16_to_cpu(dif->g64.apptag) & appmask) != (apptag & appmask)) {
return NVME_E2E_APP_ERROR;
}
}
if (prinfo & NVME_PRINFO_PRCHK_REF) {
trace_pci_nvme_dif_prchk_reftag_crc64(r, reftag);
if (r != reftag) {
return NVME_E2E_REF_ERROR;
}
}
return NVME_SUCCESS;
}
static uint16_t nvme_dif_prchk(NvmeNamespace *ns, NvmeDifTuple *dif,
uint8_t *buf, uint8_t *mbuf, size_t pil,
uint8_t prinfo, uint16_t apptag,
uint16_t appmask, uint64_t reftag)
{
switch (ns->pif) {
case NVME_PI_GUARD_16:
return nvme_dif_prchk_crc16(ns, dif, buf, mbuf, pil, prinfo, apptag,
appmask, reftag);
case NVME_PI_GUARD_64:
return nvme_dif_prchk_crc64(ns, dif, buf, mbuf, pil, prinfo, apptag,
appmask, reftag);
}
abort();
}
uint16_t nvme_dif_check(NvmeNamespace *ns, uint8_t *buf, size_t len,
uint8_t *mbuf, size_t mlen, uint8_t prinfo,
uint64_t slba, uint16_t apptag,
uint16_t appmask, uint64_t *reftag)
{
uint8_t *bufp, *end = buf + len;
int16_t pil = 0;
uint16_t status;
status = nvme_check_prinfo(ns, prinfo, slba, *reftag);
if (status) {
return status;
}
if (!(ns->id_ns.dps & NVME_ID_NS_DPS_FIRST_EIGHT)) {
pil = ns->lbaf.ms - nvme_pi_tuple_size(ns);
}
trace_pci_nvme_dif_check(prinfo, ns->lbasz + pil);
for (bufp = buf; bufp < end; bufp += ns->lbasz, mbuf += ns->lbaf.ms) {
NvmeDifTuple *dif = (NvmeDifTuple *)(mbuf + pil);
status = nvme_dif_prchk(ns, dif, bufp, mbuf, pil, prinfo, apptag,
appmask, *reftag);
if (status) {
/*
* The first block of a 'raw' image is always allocated, so we
* cannot reliably know if the block is all zeroes or not. For
* CRC16 this works fine because the T10 CRC16 is 0x0 for all
* zeroes, but the Rocksoft CRC64 is not. Thus, if a guard error is
* detected for the first block, check if it is zeroed and manually
* set the protection information to all ones to disable protection
* information checking.
*/
if (status == NVME_E2E_GUARD_ERROR && slba == 0x0 && bufp == buf) {
g_autofree uint8_t *zeroes = g_malloc0(ns->lbasz);
if (memcmp(bufp, zeroes, ns->lbasz) == 0) {
memset(mbuf + pil, 0xff, nvme_pi_tuple_size(ns));
}
} else {
return status;
}
}
if (NVME_ID_NS_DPS_TYPE(ns->id_ns.dps) != NVME_ID_NS_DPS_TYPE_3) {
(*reftag)++;
}
}
return NVME_SUCCESS;
}
uint16_t nvme_dif_mangle_mdata(NvmeNamespace *ns, uint8_t *mbuf, size_t mlen,
uint64_t slba)
{
BlockBackend *blk = ns->blkconf.blk;
BlockDriverState *bs = blk_bs(blk);
int64_t moffset = 0, offset = nvme_l2b(ns, slba);
uint8_t *mbufp, *end;
bool zeroed;
int16_t pil = 0;
int64_t bytes = (mlen / ns->lbaf.ms) << ns->lbaf.ds;
int64_t pnum = 0;
Error *err = NULL;
if (!(ns->id_ns.dps & NVME_ID_NS_DPS_FIRST_EIGHT)) {
pil = ns->lbaf.ms - nvme_pi_tuple_size(ns);
}
do {
int ret;
bytes -= pnum;
ret = bdrv_block_status(bs, offset, bytes, &pnum, NULL, NULL);
if (ret < 0) {
error_setg_errno(&err, -ret, "unable to get block status");
error_report_err(err);
return NVME_INTERNAL_DEV_ERROR;
}
zeroed = !!(ret & BDRV_BLOCK_ZERO);
trace_pci_nvme_block_status(offset, bytes, pnum, ret, zeroed);
if (zeroed) {
mbufp = mbuf + moffset;
mlen = (pnum >> ns->lbaf.ds) * ns->lbaf.ms;
end = mbufp + mlen;
for (; mbufp < end; mbufp += ns->lbaf.ms) {
memset(mbufp + pil, 0xff, nvme_pi_tuple_size(ns));
}
}
moffset += (pnum >> ns->lbaf.ds) * ns->lbaf.ms;
offset += pnum;
} while (pnum != bytes);
return NVME_SUCCESS;
}
static void nvme_dif_rw_cb(void *opaque, int ret)
{
NvmeBounceContext *ctx = opaque;
NvmeRequest *req = ctx->req;
NvmeNamespace *ns = req->ns;
BlockBackend *blk = ns->blkconf.blk;
trace_pci_nvme_dif_rw_cb(nvme_cid(req), blk_name(blk));
qemu_iovec_destroy(&ctx->data.iov);
g_free(ctx->data.bounce);
qemu_iovec_destroy(&ctx->mdata.iov);
g_free(ctx->mdata.bounce);
g_free(ctx);
nvme_rw_complete_cb(req, ret);
}
static void nvme_dif_rw_check_cb(void *opaque, int ret)
{
NvmeBounceContext *ctx = opaque;
NvmeRequest *req = ctx->req;
NvmeNamespace *ns = req->ns;
NvmeCtrl *n = nvme_ctrl(req);
NvmeRwCmd *rw = (NvmeRwCmd *)&req->cmd;
uint64_t slba = le64_to_cpu(rw->slba);
uint8_t prinfo = NVME_RW_PRINFO(le16_to_cpu(rw->control));
uint16_t apptag = le16_to_cpu(rw->apptag);
uint16_t appmask = le16_to_cpu(rw->appmask);
uint64_t reftag = le32_to_cpu(rw->reftag);
uint64_t cdw3 = le32_to_cpu(rw->cdw3);
uint16_t status;
reftag |= cdw3 << 32;
trace_pci_nvme_dif_rw_check_cb(nvme_cid(req), prinfo, apptag, appmask,
reftag);
if (ret) {
goto out;
}
status = nvme_dif_mangle_mdata(ns, ctx->mdata.bounce, ctx->mdata.iov.size,
slba);
if (status) {
req->status = status;
goto out;
}
status = nvme_dif_check(ns, ctx->data.bounce, ctx->data.iov.size,
ctx->mdata.bounce, ctx->mdata.iov.size, prinfo,
slba, apptag, appmask, &reftag);
if (status) {
req->status = status;
goto out;
}
status = nvme_bounce_data(n, ctx->data.bounce, ctx->data.iov.size,
NVME_TX_DIRECTION_FROM_DEVICE, req);
if (status) {
req->status = status;
goto out;
}
if (prinfo & NVME_PRINFO_PRACT && ns->lbaf.ms == nvme_pi_tuple_size(ns)) {
goto out;
}
status = nvme_bounce_mdata(n, ctx->mdata.bounce, ctx->mdata.iov.size,
NVME_TX_DIRECTION_FROM_DEVICE, req);
if (status) {
req->status = status;
}
out:
nvme_dif_rw_cb(ctx, ret);
}
static void nvme_dif_rw_mdata_in_cb(void *opaque, int ret)
{
NvmeBounceContext *ctx = opaque;
NvmeRequest *req = ctx->req;
NvmeNamespace *ns = req->ns;
NvmeRwCmd *rw = (NvmeRwCmd *)&req->cmd;
uint64_t slba = le64_to_cpu(rw->slba);
uint32_t nlb = le16_to_cpu(rw->nlb) + 1;
size_t mlen = nvme_m2b(ns, nlb);
uint64_t offset = nvme_moff(ns, slba);
BlockBackend *blk = ns->blkconf.blk;
trace_pci_nvme_dif_rw_mdata_in_cb(nvme_cid(req), blk_name(blk));
if (ret) {
goto out;
}
ctx->mdata.bounce = g_malloc(mlen);
qemu_iovec_reset(&ctx->mdata.iov);
qemu_iovec_add(&ctx->mdata.iov, ctx->mdata.bounce, mlen);
req->aiocb = blk_aio_preadv(blk, offset, &ctx->mdata.iov, 0,
nvme_dif_rw_check_cb, ctx);
return;
out:
nvme_dif_rw_cb(ctx, ret);
}
static void nvme_dif_rw_mdata_out_cb(void *opaque, int ret)
{
NvmeBounceContext *ctx = opaque;
NvmeRequest *req = ctx->req;
NvmeNamespace *ns = req->ns;
NvmeRwCmd *rw = (NvmeRwCmd *)&req->cmd;
uint64_t slba = le64_to_cpu(rw->slba);
uint64_t offset = nvme_moff(ns, slba);
BlockBackend *blk = ns->blkconf.blk;
trace_pci_nvme_dif_rw_mdata_out_cb(nvme_cid(req), blk_name(blk));
if (ret) {
goto out;
}
req->aiocb = blk_aio_pwritev(blk, offset, &ctx->mdata.iov, 0,
nvme_dif_rw_cb, ctx);
return;
out:
nvme_dif_rw_cb(ctx, ret);
}
uint16_t nvme_dif_rw(NvmeCtrl *n, NvmeRequest *req)
{
NvmeRwCmd *rw = (NvmeRwCmd *)&req->cmd;
NvmeNamespace *ns = req->ns;
BlockBackend *blk = ns->blkconf.blk;
bool wrz = rw->opcode == NVME_CMD_WRITE_ZEROES;
uint32_t nlb = le16_to_cpu(rw->nlb) + 1;
uint64_t slba = le64_to_cpu(rw->slba);
size_t len = nvme_l2b(ns, nlb);
size_t mlen = nvme_m2b(ns, nlb);
size_t mapped_len = len;
int64_t offset = nvme_l2b(ns, slba);
uint8_t prinfo = NVME_RW_PRINFO(le16_to_cpu(rw->control));
uint16_t apptag = le16_to_cpu(rw->apptag);
uint16_t appmask = le16_to_cpu(rw->appmask);
uint64_t reftag = le32_to_cpu(rw->reftag);
uint64_t cdw3 = le32_to_cpu(rw->cdw3);
bool pract = !!(prinfo & NVME_PRINFO_PRACT);
NvmeBounceContext *ctx;
uint16_t status;
reftag |= cdw3 << 32;
trace_pci_nvme_dif_rw(pract, prinfo);
ctx = g_new0(NvmeBounceContext, 1);
ctx->req = req;
if (wrz) {
BdrvRequestFlags flags = BDRV_REQ_MAY_UNMAP;
if (prinfo & NVME_PRINFO_PRCHK_MASK) {
status = NVME_INVALID_PROT_INFO | NVME_DNR;
goto err;
}
if (pract) {
uint8_t *mbuf, *end;
int16_t pil = ns->lbaf.ms - nvme_pi_tuple_size(ns);
status = nvme_check_prinfo(ns, prinfo, slba, reftag);
if (status) {
goto err;
}
flags = 0;
ctx->mdata.bounce = g_malloc0(mlen);
qemu_iovec_init(&ctx->mdata.iov, 1);
qemu_iovec_add(&ctx->mdata.iov, ctx->mdata.bounce, mlen);
mbuf = ctx->mdata.bounce;
end = mbuf + mlen;
if (ns->id_ns.dps & NVME_ID_NS_DPS_FIRST_EIGHT) {
pil = 0;
}
for (; mbuf < end; mbuf += ns->lbaf.ms) {
NvmeDifTuple *dif = (NvmeDifTuple *)(mbuf + pil);
switch (ns->pif) {
case NVME_PI_GUARD_16:
dif->g16.apptag = cpu_to_be16(apptag);
dif->g16.reftag = cpu_to_be32(reftag);
break;
case NVME_PI_GUARD_64:
dif->g64.guard = cpu_to_be64(0x6482d367eb22b64e);
dif->g64.apptag = cpu_to_be16(apptag);
dif->g64.sr[0] = reftag >> 40;
dif->g64.sr[1] = reftag >> 32;
dif->g64.sr[2] = reftag >> 24;
dif->g64.sr[3] = reftag >> 16;
dif->g64.sr[4] = reftag >> 8;
dif->g64.sr[5] = reftag;
break;
default:
abort();
}
switch (NVME_ID_NS_DPS_TYPE(ns->id_ns.dps)) {
case NVME_ID_NS_DPS_TYPE_1:
case NVME_ID_NS_DPS_TYPE_2:
reftag++;
}
}
}
req->aiocb = blk_aio_pwrite_zeroes(blk, offset, len, flags,
nvme_dif_rw_mdata_out_cb, ctx);
return NVME_NO_COMPLETE;
}
if (nvme_ns_ext(ns) && !(pract && ns->lbaf.ms == nvme_pi_tuple_size(ns))) {
mapped_len += mlen;
}
status = nvme_map_dptr(n, &req->sg, mapped_len, &req->cmd);
if (status) {
goto err;
}
ctx->data.bounce = g_malloc(len);
qemu_iovec_init(&ctx->data.iov, 1);
qemu_iovec_add(&ctx->data.iov, ctx->data.bounce, len);
if (req->cmd.opcode == NVME_CMD_READ) {
block_acct_start(blk_get_stats(blk), &req->acct, ctx->data.iov.size,
BLOCK_ACCT_READ);
req->aiocb = blk_aio_preadv(ns->blkconf.blk, offset, &ctx->data.iov, 0,
nvme_dif_rw_mdata_in_cb, ctx);
return NVME_NO_COMPLETE;
}
status = nvme_bounce_data(n, ctx->data.bounce, ctx->data.iov.size,
NVME_TX_DIRECTION_TO_DEVICE, req);
if (status) {
goto err;
}
ctx->mdata.bounce = g_malloc(mlen);
qemu_iovec_init(&ctx->mdata.iov, 1);
qemu_iovec_add(&ctx->mdata.iov, ctx->mdata.bounce, mlen);
if (!(pract && ns->lbaf.ms == nvme_pi_tuple_size(ns))) {
status = nvme_bounce_mdata(n, ctx->mdata.bounce, ctx->mdata.iov.size,
NVME_TX_DIRECTION_TO_DEVICE, req);
if (status) {
goto err;
}
}
status = nvme_check_prinfo(ns, prinfo, slba, reftag);
if (status) {
goto err;
}
if (pract) {
/* splice generated protection information into the buffer */
nvme_dif_pract_generate_dif(ns, ctx->data.bounce, ctx->data.iov.size,
ctx->mdata.bounce, ctx->mdata.iov.size,
apptag, &reftag);
} else {
status = nvme_dif_check(ns, ctx->data.bounce, ctx->data.iov.size,
ctx->mdata.bounce, ctx->mdata.iov.size, prinfo,
slba, apptag, appmask, &reftag);
if (status) {
goto err;
}
}
block_acct_start(blk_get_stats(blk), &req->acct, ctx->data.iov.size,
BLOCK_ACCT_WRITE);
req->aiocb = blk_aio_pwritev(ns->blkconf.blk, offset, &ctx->data.iov, 0,
nvme_dif_rw_mdata_out_cb, ctx);
return NVME_NO_COMPLETE;
err:
qemu_iovec_destroy(&ctx->data.iov);
g_free(ctx->data.bounce);
qemu_iovec_destroy(&ctx->mdata.iov);
g_free(ctx->mdata.bounce);
g_free(ctx);
return status;
}
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