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authorXin Long <lucien.xin@gmail.com>2018-03-14 14:05:30 +0300
committerDavid S. Miller <davem@davemloft.net>2018-03-14 20:48:27 +0300
commit1b1e0bc9947427ae58bbe7de0ce9cfd591b589b9 (patch)
tree4d113bf0c79a697420a1463d6fe1798ad6f4e0d9 /net/sctp/chunk.c
parentc469012729bda6515779590d9588d3e36fdf449d (diff)
downloadlinux-1b1e0bc9947427ae58bbe7de0ce9cfd591b589b9.tar.xz
sctp: add refcnt support for sh_key
With refcnt support for sh_key, chunks auth sh_keys can be decided before enqueuing it. Changing the active key later will not affect the chunks already enqueued. Furthermore, this is necessary when adding the support for authinfo for sendmsg in next patch. Note that struct sctp_chunk can't be grown due to that performance drop issue on slow cpu, so it just reuses head_skb memory for shkey in sctp_chunk. Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/chunk.c')
-rw-r--r--net/sctp/chunk.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/net/sctp/chunk.c b/net/sctp/chunk.c
index 991a530c6b31..9f28a9aae976 100644
--- a/net/sctp/chunk.c
+++ b/net/sctp/chunk.c
@@ -168,6 +168,7 @@ struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *asoc,
{
size_t len, first_len, max_data, remaining;
size_t msg_len = iov_iter_count(from);
+ struct sctp_shared_key *shkey = NULL;
struct list_head *pos, *temp;
struct sctp_chunk *chunk;
struct sctp_datamsg *msg;
@@ -204,6 +205,8 @@ struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *asoc,
if (hmac_desc)
max_data -= SCTP_PAD4(sizeof(struct sctp_auth_chunk) +
hmac_desc->hmac_len);
+
+ shkey = asoc->shkey;
}
/* Check what's our max considering the above */
@@ -275,6 +278,8 @@ struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *asoc,
if (err < 0)
goto errout_chunk_free;
+ chunk->shkey = shkey;
+
/* Put the chunk->skb back into the form expected by send. */
__skb_pull(chunk->skb, (__u8 *)chunk->chunk_hdr -
chunk->skb->data);