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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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20
include/net/sctp/sctp.h
View file

@ -428,26 +428,6 @@ static inline int sctp_list_single_entry(struct list_head *head)
return (head->next != head) && (head->next == head->prev);
}
/* Break down data chunks at this point. */
static inline int sctp_frag_point(const struct sctp_association *asoc, int pmtu)
{
struct sctp_sock *sp = sctp_sk(asoc->base.sk);
struct sctp_af *af = sp->pf->af;
int frag = pmtu;
frag -= af->ip_options_len(asoc->base.sk);
frag -= af->net_header_len;
frag -= sizeof(struct sctphdr) + sctp_datachk_len(&asoc->stream);
if (asoc->user_frag)
frag = min_t(int, frag, asoc->user_frag);
frag = SCTP_TRUNC4(min_t(int, frag, SCTP_MAX_CHUNK_LEN -
sctp_datachk_len(&asoc->stream)));
return frag;
}
static inline void sctp_assoc_pending_pmtu(struct sctp_association *asoc)
{
sctp_assoc_sync_pmtu(asoc);

1
include/net/sctp/structs.h
View file

@ -2097,6 +2097,7 @@ int sctp_assoc_update(struct sctp_association *old,
__u32 sctp_association_get_next_tsn(struct sctp_association *);
void sctp_assoc_update_frag_point(struct sctp_association *asoc);
void sctp_assoc_set_pmtu(struct sctp_association *asoc, __u32 pmtu);
void sctp_assoc_sync_pmtu(struct sctp_association *asoc);
void sctp_assoc_rwnd_increase(struct sctp_association *, unsigned int);