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sctp: introduce sctp_assoc_update_frag_point

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and avoid the open-coded versions of it.

Now sctp_datamsg_from_user can just re-use asoc->frag_point as it will
always be updated.

Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Marcelo Ricardo Leitner 2018-04-26 16:58:55 -03:00 • committed by David S. Miller
parent feddd6c1af
commit 2f5e3c9df6
5 changed files with 20 additions and 39 deletions
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12
net/sctp/chunk.c
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@ -172,8 +172,6 @@ struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *asoc,
struct list_head *pos, *temp;
struct sctp_chunk *chunk;
struct sctp_datamsg *msg;
struct sctp_sock *sp;
struct sctp_af *af;
int err;
msg = sctp_datamsg_new(GFP_KERNEL);
@ -192,12 +190,7 @@ struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *asoc,
/* This is the biggest possible DATA chunk that can fit into
* the packet
*/
sp = sctp_sk(asoc->base.sk);
af = sp->pf->af;
max_data = asoc->pathmtu - af->net_header_len -
sizeof(struct sctphdr) - sctp_datachk_len(&asoc->stream) -
af->ip_options_len(asoc->base.sk);
max_data = SCTP_TRUNC4(max_data);
max_data = asoc->frag_point;
/* If the the peer requested that we authenticate DATA chunks
* we need to account for bundling of the AUTH chunks along with
@ -222,9 +215,6 @@ struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *asoc,
}
}
/* Check what's our max considering the above */
max_data = min_t(size_t, max_data, asoc->frag_point);
/* Set first_len and then account for possible bundles on first frag */
first_len = max_data;