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Diffstat (limited to 'crypto/af_alg.c')
-rw-r--r--crypto/af_alg.c24
1 files changed, 22 insertions, 2 deletions
diff --git a/crypto/af_alg.c b/crypto/af_alg.c
index fd56ccff6fed..9c12530d604a 100644
--- a/crypto/af_alg.c
+++ b/crypto/af_alg.c
@@ -985,7 +985,7 @@ int af_alg_sendmsg(struct socket *sock, struct msghdr *msg, size_t size,
while (size) {
struct scatterlist *sg;
size_t len = size;
- size_t plen;
+ ssize_t plen;
/* use the existing memory in an allocated page */
if (ctx->merge) {
@@ -1030,7 +1030,27 @@ int af_alg_sendmsg(struct socket *sock, struct msghdr *msg, size_t size,
if (sgl->cur)
sg_unmark_end(sg + sgl->cur - 1);
- if (1 /* TODO check MSG_SPLICE_PAGES */) {
+ if (msg->msg_flags & MSG_SPLICE_PAGES) {
+ struct sg_table sgtable = {
+ .sgl = sg,
+ .nents = sgl->cur,
+ .orig_nents = sgl->cur,
+ };
+
+ plen = extract_iter_to_sg(&msg->msg_iter, len, &sgtable,
+ MAX_SGL_ENTS, 0);
+ if (plen < 0) {
+ err = plen;
+ goto unlock;
+ }
+
+ for (; sgl->cur < sgtable.nents; sgl->cur++)
+ get_page(sg_page(&sg[sgl->cur]));
+ len -= plen;
+ ctx->used += plen;
+ copied += plen;
+ size -= plen;
+ } else {
do {
struct page *pg;
unsigned int i = sgl->cur;