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sctp: introduce sctp_assoc_set_pmtu

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All changes to asoc PMTU should now go through this wrapper, making it
easier to track them and to do other actions upon it.

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 16:58:53 -03:00 committed by David S. Miller
parent c88da20f95
commit c4b2893dae
3 changed files with 15 additions and 9 deletions
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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_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);
void sctp_assoc_rwnd_decrease(struct sctp_association *, unsigned int);

21
net/sctp/associola.c
View File

@ -660,13 +660,9 @@ struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc,
* If not and the current association PMTU is higher than the new
* peer's PMTU, reset the association PMTU to the new peer's PMTU.
*/
if (asoc->pathmtu)
asoc->pathmtu = min_t(int, peer->pathmtu, asoc->pathmtu);
else
asoc->pathmtu = peer->pathmtu;
pr_debug("%s: association:%p PMTU set to %d\n", __func__, asoc,
asoc->pathmtu);
sctp_assoc_set_pmtu(asoc, asoc->pathmtu ?
min_t(int, peer->pathmtu, asoc->pathmtu) :
peer->pathmtu);
peer->pmtu_pending = 0;
@ -1374,6 +1370,15 @@ sctp_assoc_choose_alter_transport(struct sctp_association *asoc,
}
}
void sctp_assoc_set_pmtu(struct sctp_association *asoc, __u32 pmtu)
{
if (asoc->pathmtu != pmtu)
asoc->pathmtu = pmtu;
pr_debug("%s: asoc:%p, pmtu:%d, frag_point:%d\n", __func__, asoc,
asoc->pathmtu, asoc->frag_point);
}
/* Update the association's pmtu and frag_point by going through all the
* transports. This routine is called when a transport's PMTU has changed.
*/
@ -1397,7 +1402,7 @@ void sctp_assoc_sync_pmtu(struct sctp_association *asoc)
pmtu = t->pathmtu;
}
asoc->pathmtu = pmtu;
sctp_assoc_set_pmtu(asoc, pmtu);
asoc->frag_point = sctp_frag_point(asoc, pmtu);
pr_debug("%s: asoc:%p, pmtu:%d, frag_point:%d\n", __func__, asoc,

2
net/sctp/socket.c
View File

@ -2539,7 +2539,7 @@ static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params,
trans->pathmtu = params->spp_pathmtu;
sctp_assoc_sync_pmtu(asoc);
} else if (asoc) {
asoc->pathmtu = params->spp_pathmtu;
sctp_assoc_set_pmtu(asoc, params->spp_pathmtu);
} else {
sp->pathmtu = params->spp_pathmtu;
}