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authorTadeusz Struk <tadeusz.struk@intel.com>2014-12-08 20:03:42 (GMT)
committerHerbert Xu <herbert@gondor.apana.org.au>2014-12-22 12:02:41 (GMT)
commit0f477b655a524515ec9a263d70d51f460c05a161 (patch)
tree5cfb69e0ac66a1edcfe7eb10cb1b6d7a131a9c8a /crypto
parent2d2ec0642a85966b6a299bbcd94707982327ace8 (diff)
crypto: algif - Mark sgl end at the end of data
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>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/algif_skcipher.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/crypto/algif_skcipher.c b/crypto/algif_skcipher.c
index c12207c..38a6757 100644
--- a/crypto/algif_skcipher.c
+++ b/crypto/algif_skcipher.c
@@ -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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