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nvme/tcp: Factor out operation to append multiple SGL entries

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Such small refactoring will be helpful to add DIF insert/strip
feature, and is done in this patch.

Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Change-Id: I4b16a041d176acef948d2af1a5a1811380287738
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/458527
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
This commit is contained in:
Shuhei Matsumoto 2019-06-19 09:04:42 +09:00 committed by Darek Stojaczyk
parent b2982b7d44
commit ade7d070f2
1 changed files with 19 additions and 10 deletions
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29
include/spdk_internal/nvme_tcp.h
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@ -247,12 +247,26 @@ _nvme_tcp_sgl_append(struct _nvme_tcp_sgl *s, uint8_t *data, uint32_t data_len)
return true;
}
static inline bool
_nvme_tcp_sgl_append_multi(struct _nvme_tcp_sgl *s, struct iovec *iov, int iovcnt)
{
int i;
for (i = 0; i < iovcnt; i++) {
if (!_nvme_tcp_sgl_append(s, iov[i].iov_base, iov[i].iov_len)) {
return false;
}
}
return true;
}
static int
nvme_tcp_build_iovs(struct iovec *iov, int iovcnt, struct nvme_tcp_pdu *pdu,
bool hdgst_enable, bool ddgst_enable, uint32_t *_mapped_length)
{
int enable_digest;
uint32_t hlen, plen, i;
uint32_t hlen, plen;
struct _nvme_tcp_sgl *sgl;
if (iovcnt == 0) {
@ -295,10 +309,8 @@ nvme_tcp_build_iovs(struct iovec *iov, int iovcnt, struct nvme_tcp_pdu *pdu,
/* Data Segment */
plen += pdu->data_len;
for (i = 0; i < pdu->data_iovcnt; i++) {
if (!_nvme_tcp_sgl_append(sgl, pdu->data_iov[i].iov_base, pdu->data_iov[i].iov_len)) {
goto end;
}
if (!_nvme_tcp_sgl_append_multi(sgl, pdu->data_iov, pdu->data_iovcnt)) {
goto end;
}
/* Data Digest */
@ -325,7 +337,6 @@ nvme_tcp_build_payload_iovs(struct iovec *iov, int iovcnt, struct nvme_tcp_pdu *
bool ddgst_enable, uint32_t *_mapped_length)
{
struct _nvme_tcp_sgl *sgl;
uint32_t i;
if (iovcnt == 0) {
return 0;
@ -334,10 +345,8 @@ nvme_tcp_build_payload_iovs(struct iovec *iov, int iovcnt, struct nvme_tcp_pdu *
sgl = &pdu->sgl;
_nvme_tcp_sgl_init(sgl, iov, iovcnt, pdu->readv_offset);
for (i = 0; i < pdu->data_iovcnt; i++) {
if (!_nvme_tcp_sgl_append(sgl, pdu->data_iov[i].iov_base, pdu->data_iov[i].iov_len)) {
goto end;
}
if (!_nvme_tcp_sgl_append_multi(sgl, pdu->data_iov, pdu->data_iovcnt)) {
goto end;
}
/* Data Digest */