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dif: Merge single and multiple iovec cases of spdk_dif_generate_stream

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As same as spdk_dif_set_md_interleave_iovs, no noticeable performance
difference was observed even if dif_generate_stream and
dif_generate_stream_split are merged into the latter.

spdk_dif_generate_stream will be updated in subsequent patches anyway.
Hence merge them into dif_generate_stream_split.

Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Change-Id: I77b588527bc7533dc38a36e450972758ce57d6bb
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/457760
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
This commit is contained in:
Shuhei Matsumoto 2019-06-13 07:33:40 +09:00 committed by Darek Stojaczyk
parent 759a700f2a
commit df2164f6f4
1 changed files with 8 additions and 56 deletions
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60
lib/util/dif.c
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@ -1438,49 +1438,18 @@ end:
return iovcnt - dif_sgl.iovcnt;
}
static int
dif_generate_stream(uint8_t *buf, uint32_t buf_len,
uint32_t data_offset, uint32_t data_len,
const struct spdk_dif_ctx *ctx)
{
uint32_t data_block_size, offset_blocks, num_blocks, i;
uint16_t guard = 0;
data_block_size = ctx->block_size - ctx->md_size;
offset_blocks = data_offset / data_block_size;
data_len += data_offset % data_block_size;
data_offset = offset_blocks * ctx->block_size;
num_blocks = data_len / data_block_size;
if (data_offset + num_blocks * ctx->block_size > buf_len) {
return -ERANGE;
}
buf += data_offset;
for (i = 0; i < num_blocks; i++) {
if (ctx->dif_flags & SPDK_DIF_FLAGS_GUARD_CHECK) {
guard = spdk_crc16_t10dif(ctx->guard_seed, buf, ctx->guard_interval);
}
_dif_generate(buf + ctx->guard_interval, guard, offset_blocks + i, ctx);
buf += ctx->block_size;
}
return 0;
}
static int
dif_generate_stream_split(struct iovec *iovs, int iovcnt,
int
spdk_dif_generate_stream(struct iovec *iovs, int iovcnt,
uint32_t data_offset, uint32_t data_len,
const struct spdk_dif_ctx *ctx)
{
uint32_t data_block_size, offset_blocks, num_blocks, i;
struct _dif_sgl sgl;
if (iovs == NULL || iovcnt == 0) {
return -EINVAL;
}
data_block_size = ctx->block_size - ctx->md_size;
offset_blocks = data_offset / data_block_size;
@ -1503,20 +1472,3 @@ dif_generate_stream_split(struct iovec *iovs, int iovcnt,
return 0;
}
int
spdk_dif_generate_stream(struct iovec *iovs, int iovcnt,
uint32_t data_offset, uint32_t data_len,
const struct spdk_dif_ctx *ctx)
{
if (iovs == NULL || iovcnt == 0) {
return -EINVAL;
}
if (iovcnt == 1) {
return dif_generate_stream(iovs[0].iov_base, iovs[0].iov_len,
data_offset, data_len, ctx);
} else {
return dif_generate_stream_split(iovs, iovcnt, data_offset, data_len, ctx);
}
}