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| author | Xin Long <lucien.xin@gmail.com> | 2018-03-14 14:05:30 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-03-14 20:48:27 +0300 |
| commit | 1b1e0bc9947427ae58bbe7de0ce9cfd591b589b9 (patch) | |
| tree | 4d113bf0c79a697420a1463d6fe1798ad6f4e0d9 /net/sctp/chunk.c | |
| parent | c469012729bda6515779590d9588d3e36fdf449d (diff) | |
| download | linux-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.c | 5 |
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); |