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Commit c4b2893d authored by Marcelo Ricardo Leitner's avatar Marcelo Ricardo Leitner Committed by David S. Miller
Browse files

sctp: introduce sctp_assoc_set_pmtu 



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: default avatarMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c88da20f

include/net/sctp/structs.h

+1 −0
Original line number Diff line number Diff line
@@ -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);

net/sctp/associola.c

+13 −8
Original line number Diff line number Diff line
@@ -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,

net/sctp/socket.c

+1 −1
Original line number Diff line number Diff line
@@ -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;

		}