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author | Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> | 2018-04-26 16:58:55 -0300 |
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committer | David S. Miller <davem@davemloft.net> | 2018-04-27 14:35:23 -0400 |
commit | 2f5e3c9df6938b823664869ec87af3da8df272f6 (patch) | |
tree | 22be567d684b1c89bc40f433099a2909fdbbfb2e | |
parent | feddd6c1af30ab11d73ce0e4e76b40dfc899dbda (diff) | |
download | linux-2f5e3c9df6938b823664869ec87af3da8df272f6.tar.gz linux-2f5e3c9df6938b823664869ec87af3da8df272f6.tar.bz2 linux-2f5e3c9df6938b823664869ec87af3da8df272f6.zip |
sctp: introduce sctp_assoc_update_frag_point
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>
-rw-r--r-- | include/net/sctp/sctp.h | 20 | ||||
-rw-r--r-- | include/net/sctp/structs.h | 1 | ||||
-rw-r--r-- | net/sctp/associola.c | 24 | ||||
-rw-r--r-- | net/sctp/chunk.c | 12 | ||||
-rw-r--r-- | net/sctp/socket.c | 2 |
5 files changed, 20 insertions, 39 deletions
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h index 0b98e4683f10..350c65620a4e 100644 --- a/include/net/sctp/sctp.h +++ b/include/net/sctp/sctp.h @@ -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); diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index c5e244be8f1e..ebf809eed33a 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -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); diff --git a/net/sctp/associola.c b/net/sctp/associola.c index 85b362324084..a29025418b96 100644 --- a/net/sctp/associola.c +++ b/net/sctp/associola.c @@ -666,8 +666,6 @@ struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc, peer->pmtu_pending = 0; - asoc->frag_point = sctp_frag_point(asoc, asoc->pathmtu); - /* The asoc->peer.port might not be meaningful yet, but * initialize the packet structure anyway. */ @@ -1370,10 +1368,26 @@ sctp_assoc_choose_alter_transport(struct sctp_association *asoc, } } +void sctp_assoc_update_frag_point(struct sctp_association *asoc) +{ + int frag = sctp_mtu_payload(sctp_sk(asoc->base.sk), asoc->pathmtu, + sctp_datachk_len(&asoc->stream)); + + if (asoc->user_frag) + frag = min_t(int, frag, asoc->user_frag); + + frag = min_t(int, frag, SCTP_MAX_CHUNK_LEN - + sctp_datachk_len(&asoc->stream)); + + asoc->frag_point = SCTP_TRUNC4(frag); +} + void sctp_assoc_set_pmtu(struct sctp_association *asoc, __u32 pmtu) { - if (asoc->pathmtu != pmtu) + if (asoc->pathmtu != pmtu) { asoc->pathmtu = pmtu; + sctp_assoc_update_frag_point(asoc); + } pr_debug("%s: asoc:%p, pmtu:%d, frag_point:%d\n", __func__, asoc, asoc->pathmtu, asoc->frag_point); @@ -1403,10 +1417,6 @@ void sctp_assoc_sync_pmtu(struct sctp_association *asoc) } 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, - asoc->pathmtu, asoc->frag_point); } /* Should we send a SACK to update our peer? */ diff --git a/net/sctp/chunk.c b/net/sctp/chunk.c index be296d633e95..79daa98208c3 100644 --- a/net/sctp/chunk.c +++ b/net/sctp/chunk.c @@ -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; diff --git a/net/sctp/socket.c b/net/sctp/socket.c index b9d14f57146b..21bf457be3ea 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -3251,7 +3251,7 @@ static int sctp_setsockopt_maxseg(struct sock *sk, char __user *optval, unsigned sctp_datachk_len(&asoc->stream); } asoc->user_frag = val; - asoc->frag_point = sctp_frag_point(asoc, asoc->pathmtu); + sctp_assoc_update_frag_point(asoc); } else { if (params.assoc_id && sctp_style(sk, UDP)) return -EINVAL; |