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nvmf/tcp: use the nvme_tcp_readv_data

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The purpose is to use the single readv to read both
the payload the digest(if there is a possible one).

And this patch will be prepared to support the
multiple SGL in NVMe tcp transport later.

Change-Id: Ia30a5e0080b041a65461d2be13db4e0592a70305
Signed-off-by: Ziye Yang <ziye.yang@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/447670
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
This commit is contained in:
Ziye Yang 2019-03-12 02:21:56 +08:00 committed by Jim Harris
parent 78a24106d4
commit 58739014a3
3 changed files with 91 additions and 74 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

79
include/spdk_internal/nvme_tcp.h
View File

@ -68,6 +68,14 @@
typedef void (*nvme_tcp_qpair_xfer_complete_cb)(void *cb_arg);
struct _iov_ctx {
struct iovec *iov;
int num_iovs;
uint32_t iov_offset;
int iovcnt;
uint32_t mapped_len;
};
struct nvme_tcp_pdu {
union {
/* to hold error pdu data */
@ -85,13 +93,12 @@ struct nvme_tcp_pdu {
} hdr;
bool has_hdgst;
bool ddgst_enable;
uint8_t data_digest[SPDK_NVME_TCP_DIGEST_LEN];
int32_t padding_valid_bytes;
uint32_t ddigest_valid_bytes;
uint32_t ch_valid_bytes;
uint32_t psh_valid_bytes;
uint32_t data_valid_bytes;
nvme_tcp_qpair_xfer_complete_cb cb_fn;
void *cb_arg;
@ -99,10 +106,12 @@ struct nvme_tcp_pdu {
void *data;
uint32_t data_len;
uint32_t readv_offset;
uint32_t writev_offset;
TAILQ_ENTRY(nvme_tcp_pdu) tailq;
uint32_t remaining;
uint32_t padding_len;
struct _iov_ctx iov_ctx;
void *ctx; /* data tied to a tcp request */
};
@ -137,14 +146,6 @@ enum nvme_tcp_qpair_state {
NVME_TCP_QPAIR_STATE_EXITED = 3,
};
struct _iov_ctx {
struct iovec *iov;
int num_iovs;
uint32_t iov_offset;
int iovcnt;
uint32_t mapped_len;
};
static uint32_t
nvme_tcp_pdu_calc_header_digest(struct nvme_tcp_pdu *pdu)
{
@ -216,15 +217,16 @@ static int
nvme_tcp_build_iovecs(struct iovec *iovec, int num_iovs, struct nvme_tcp_pdu *pdu,
bool hdgst_enable, bool ddgst_enable, uint32_t *_mapped_length)
{
struct _iov_ctx ctx;
int enable_digest;
uint32_t hlen, plen;
struct _iov_ctx *ctx;
if (num_iovs == 0) {
return 0;
}
_iov_ctx_init(&ctx, iovec, num_iovs, pdu->writev_offset);
ctx = &pdu->iov_ctx;
_iov_ctx_init(ctx, iovec, num_iovs, pdu->writev_offset);
hlen = pdu->hdr.common.hlen;
enable_digest = 1;
if (pdu->hdr.common.pdu_type == SPDK_NVME_TCP_PDU_TYPE_IC_REQ ||
@ -243,7 +245,7 @@ nvme_tcp_build_iovecs(struct iovec *iovec, int num_iovs, struct nvme_tcp_pdu *pd
plen = hlen;
if (!pdu->data_len || !pdu->data) {
/* PDU header + possible header digest */
_iov_ctx_set_iov(&ctx, (uint8_t *)&pdu->hdr.raw, hlen);
_iov_ctx_set_iov(ctx, (uint8_t *)&pdu->hdr.raw, hlen);
goto end;
}
@ -253,25 +255,25 @@ nvme_tcp_build_iovecs(struct iovec *iovec, int num_iovs, struct nvme_tcp_pdu *pd
plen = hlen;
}
if (!_iov_ctx_set_iov(&ctx, (uint8_t *)&pdu->hdr.raw, hlen)) {
if (!_iov_ctx_set_iov(ctx, (uint8_t *)&pdu->hdr.raw, hlen)) {
goto end;
}
/* Data Segment */
plen += pdu->data_len;
if (!_iov_ctx_set_iov(&ctx, pdu->data, pdu->data_len)) {
if (!_iov_ctx_set_iov(ctx, pdu->data, pdu->data_len)) {
goto end;
}
/* Data Digest */
if (enable_digest && ddgst_enable) {
plen += SPDK_NVME_TCP_DIGEST_LEN;
_iov_ctx_set_iov(&ctx, pdu->data_digest, SPDK_NVME_TCP_DIGEST_LEN);
_iov_ctx_set_iov(ctx, pdu->data_digest, SPDK_NVME_TCP_DIGEST_LEN);
}
end:
if (_mapped_length != NULL) {
*_mapped_length = ctx.mapped_len;
*_mapped_length = ctx->mapped_len;
}
/* check the plen for the first time constructing iov */
@ -279,7 +281,35 @@ end:
assert(plen == pdu->hdr.common.plen);
}
return ctx.iovcnt;
return ctx->iovcnt;
}
static int
nvme_tcp_build_payload_iovecs(struct iovec *iovec, int num_iovs, struct nvme_tcp_pdu *pdu,
bool ddgst_enable, uint32_t *_mapped_length)
{
struct _iov_ctx *ctx;
if (num_iovs == 0) {
return 0;
}
ctx = &pdu->iov_ctx;
_iov_ctx_init(ctx, iovec, num_iovs, pdu->readv_offset);
if (!_iov_ctx_set_iov(ctx, pdu->data, pdu->data_len)) {
goto end;
}
/* Data Digest */
if (ddgst_enable) {
_iov_ctx_set_iov(ctx, pdu->data_digest, SPDK_NVME_TCP_DIGEST_LEN);
}
end:
if (_mapped_length != NULL) {
*_mapped_length = ctx->mapped_len;
}
return ctx->iovcnt;
}
static int
@ -329,4 +359,17 @@ nvme_tcp_read_data(struct spdk_sock *sock, int bytes,
return nvme_tcp_readv_data(sock, &iov, 1);
}
static int
nvme_tcp_read_payload_data(struct spdk_sock *sock, struct nvme_tcp_pdu *pdu)
{
struct iovec iovec_array[2];
struct iovec *iov = iovec_array;
int iovec_cnt;
iovec_cnt = nvme_tcp_build_payload_iovecs(iovec_array, 2, pdu, pdu->ddgst_enable, NULL);
assert(iovec_cnt >= 0);
return nvme_tcp_readv_data(sock, iov, iovec_cnt);
}
#endif /* SPDK_INTERNAL_NVME_TCP_H */

47
lib/nvme/nvme_tcp.c
View File

@ -1018,7 +1018,7 @@ nvme_tcp_pdu_payload_handle(struct nvme_tcp_qpair *tqpair,
SPDK_DEBUGLOG(SPDK_LOG_NVME, "enter\n");
/* check data digest if need */
if (pdu->ddigest_valid_bytes) {
if (pdu->ddgst_enable) {
crc32c = nvme_tcp_pdu_calc_data_digest(pdu);
rc = MATCH_DIGEST_WORD(pdu->data_digest, crc32c);
if (rc == 0) {
@ -1499,39 +1499,26 @@ nvme_tcp_read_pdu(struct nvme_tcp_qpair *tqpair, uint32_t *reaped)
}
data_len = pdu->data_len;
/* data len */
if (pdu->data_valid_bytes < data_len) {
rc = nvme_tcp_read_data(tqpair->sock,
data_len - pdu->data_valid_bytes,
(uint8_t *)pdu->data + pdu->data_valid_bytes);
if (rc < 0) {
nvme_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_ERROR);
break;
}
pdu->data_valid_bytes += rc;
if (pdu->data_valid_bytes < data_len) {
return NVME_TCP_PDU_IN_PROGRESS;
}
}
/* data digest */
if ((pdu->hdr.common.pdu_type == SPDK_NVME_TCP_PDU_TYPE_C2H_DATA) &&
tqpair->host_ddgst_enable && (pdu->ddigest_valid_bytes < SPDK_NVME_TCP_DIGEST_LEN)) {
rc = nvme_tcp_read_data(tqpair->sock,
SPDK_NVME_TCP_DIGEST_LEN - pdu->ddigest_valid_bytes,
pdu->data_digest + pdu->ddigest_valid_bytes);
if (rc < 0) {
nvme_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_ERROR);
break;
}
if (spdk_unlikely((pdu->hdr.common.pdu_type == SPDK_NVME_TCP_PDU_TYPE_C2H_DATA) &&
tqpair->host_ddgst_enable)) {
data_len += SPDK_NVME_TCP_DIGEST_LEN;
pdu->ddgst_enable = true;
pdu->ddigest_valid_bytes += rc;
if (pdu->ddigest_valid_bytes < SPDK_NVME_TCP_DIGEST_LEN) {
return NVME_TCP_PDU_IN_PROGRESS;
}
}
rc = nvme_tcp_read_payload_data(tqpair->sock, pdu);
if (rc < 0) {
nvme_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_ERROR);
break;
}
pdu->readv_offset += rc;
if (pdu->readv_offset < data_len) {
return NVME_TCP_PDU_IN_PROGRESS;
}
assert(pdu->readv_offset == data_len);
/* All of this PDU has now been read from the socket. */
nvme_tcp_pdu_payload_handle(tqpair, reaped);
break;

39
lib/nvmf/tcp.c
View File

@ -1631,7 +1631,7 @@ spdk_nvmf_tcp_pdu_payload_handle(struct spdk_nvmf_tcp_qpair *tqpair)
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "enter\n");
/* check data digest if need */
if (pdu->ddigest_valid_bytes) {
if (pdu->ddgst_enable) {
crc32c = nvme_tcp_pdu_calc_data_digest(pdu);
rc = MATCH_DIGEST_WORD(pdu->data_digest, crc32c);
if (rc == 0) {
@ -1965,34 +1965,21 @@ spdk_nvmf_tcp_sock_process(struct spdk_nvmf_tcp_qpair *tqpair)
}
data_len = pdu->data_len;
/* data len */
if (pdu->data_valid_bytes < data_len) {
rc = nvme_tcp_read_data(tqpair->sock, data_len - pdu->data_valid_bytes,
(void *)pdu->data + pdu->data_valid_bytes);
if (rc < 0) {
return NVME_TCP_PDU_FATAL;
}
pdu->data_valid_bytes += rc;
if (pdu->data_valid_bytes < data_len) {
return NVME_TCP_PDU_IN_PROGRESS;
}
/* data digest */
if (spdk_unlikely((pdu->hdr.common.pdu_type != SPDK_NVME_TCP_PDU_TYPE_H2C_TERM_REQ) &&
tqpair->host_ddgst_enable)) {
data_len += SPDK_NVME_TCP_DIGEST_LEN;
pdu->ddgst_enable = true;
}
/* data digest */
if ((pdu->hdr.common.pdu_type != SPDK_NVME_TCP_PDU_TYPE_H2C_TERM_REQ) &&
tqpair->host_ddgst_enable && (pdu->ddigest_valid_bytes < SPDK_NVME_TCP_DIGEST_LEN)) {
rc = nvme_tcp_read_data(tqpair->sock,
SPDK_NVME_TCP_DIGEST_LEN - pdu->ddigest_valid_bytes,
pdu->data_digest + pdu->ddigest_valid_bytes);
if (rc < 0) {
return NVME_TCP_PDU_FATAL;
}
rc = nvme_tcp_read_payload_data(tqpair->sock, pdu);
if (rc < 0) {
return NVME_TCP_PDU_IN_PROGRESS;
}
pdu->ddigest_valid_bytes += rc;
if (pdu->ddigest_valid_bytes < SPDK_NVME_TCP_DIGEST_LEN) {
return NVME_TCP_PDU_IN_PROGRESS;
}
pdu->readv_offset += rc;
if (pdu->readv_offset < data_len) {
return NVME_TCP_PDU_IN_PROGRESS;
}
/* All of this PDU has now been read from the socket. */