crypto: algif - Mark sgl end at the end of data (0f477b65) · Commits · 戴 / test

algif_skcipher sends 127 sgl buffers for encryption regardless of how many buffers acctually have data to process, where the few first with valid len and the rest with zero len. This is not very eficient. This patch marks the last one with data as the last one to process. Signed-off-by:

Tadeusz Struk <tadeusz.struk@intel.com> Signed-off-by:

Herbert Xu <herbert@gondor.apana.org.au>

crypto/algif_skcipher.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -330,6 +330,7 @@ static int skcipher_sendmsg(struct kiocb unused, struct socket sock,

		sgl = list_entry(ctx->tsgl.prev, struct skcipher_sg_list, list);
		sg = sgl->sg;
		sg_unmark_end(sg + sgl->cur);
		do {
		i = sgl->cur;
		plen = min_t(int, len, PAGE_SIZE);
		@@ -355,6 +356,9 @@ static int skcipher_sendmsg(struct kiocb unused, struct socket sock,
		sgl->cur++;
		} while (len && sgl->cur < MAX_SGL_ENTS);

		if (!size)
		sg_mark_end(sg + sgl->cur - 1);

		ctx->merge = plen & (PAGE_SIZE - 1);
		}

		@@ -401,6 +405,10 @@ static ssize_t skcipher_sendpage(struct socket sock, struct page page,
		ctx->merge = 0;
		sgl = list_entry(ctx->tsgl.prev, struct skcipher_sg_list, list);

		if (sgl->cur)
		sg_unmark_end(sgl->sg + sgl->cur - 1);

		sg_mark_end(sgl->sg + sgl->cur);
		get_page(page);
		sg_set_page(sgl->sg + sgl->cur, page, size, offset);
		sgl->cur++;

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