From 8ae808eb853e3789b81b8a502cdf22bb01b76880 Mon Sep 17 00:00:00 2001 From: Xin Long Date: Sat, 8 Oct 2016 11:40:16 +0800 Subject: [PATCH] sctp: remove the old ttl expires policy The prsctp polices include ttl expires policy already, we should remove the old ttl expires codes, and just adjust the new polices' codes to be compatible with the old one for users. This patch is to remove all the old expires codes, and if prsctp polices are not set, it will still set msg's expires_at and check the expires in sctp_check_abandoned. Note that asoc->prsctp_enable is set by default, so users can't feel any difference even if they use the old expires api in userspace. Signed-off-by: Xin Long Acked-by: Marcelo Ricardo Leitner Signed-off-by: David S. Miller --- include/net/sctp/structs.h | 1 - net/sctp/chunk.c | 32 ++++++++------------------------ net/sctp/output.c | 3 --- 3 files changed, 8 insertions(+), 28 deletions(-) diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index 27a933e..bd4a3de 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -530,7 +530,6 @@ struct sctp_datamsg { /* Did the messenge fail to send? */ int send_error; u8 send_failed:1, - can_abandon:1, /* can chunks from this message can be abandoned. */ can_delay; /* should this message be Nagle delayed */ }; diff --git a/net/sctp/chunk.c b/net/sctp/chunk.c index 7a1cdf4..615f0dd 100644 --- a/net/sctp/chunk.c +++ b/net/sctp/chunk.c @@ -52,7 +52,6 @@ static void sctp_datamsg_init(struct sctp_datamsg *msg) atomic_set(&msg->refcnt, 1); msg->send_failed = 0; msg->send_error = 0; - msg->can_abandon = 0; msg->can_delay = 1; msg->expires_at = 0; INIT_LIST_HEAD(&msg->chunks); @@ -182,20 +181,11 @@ struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *asoc, /* Note: Calculate this outside of the loop, so that all fragments * have the same expiration. */ - if (sinfo->sinfo_timetolive) { - /* sinfo_timetolive is in milliseconds */ + if (asoc->peer.prsctp_capable && sinfo->sinfo_timetolive && + (SCTP_PR_TTL_ENABLED(sinfo->sinfo_flags) || + !SCTP_PR_POLICY(sinfo->sinfo_flags))) msg->expires_at = jiffies + msecs_to_jiffies(sinfo->sinfo_timetolive); - msg->can_abandon = 1; - - pr_debug("%s: msg:%p expires_at:%ld jiffies:%ld\n", __func__, - msg, msg->expires_at, jiffies); - } - - if (asoc->peer.prsctp_capable && - SCTP_PR_TTL_ENABLED(sinfo->sinfo_flags)) - msg->expires_at = - jiffies + msecs_to_jiffies(sinfo->sinfo_timetolive); /* This is the biggest possible DATA chunk that can fit into * the packet @@ -354,18 +344,8 @@ errout: /* Check whether this message has expired. */ int sctp_chunk_abandoned(struct sctp_chunk *chunk) { - if (!chunk->asoc->peer.prsctp_capable || - !SCTP_PR_POLICY(chunk->sinfo.sinfo_flags)) { - struct sctp_datamsg *msg = chunk->msg; - - if (!msg->can_abandon) - return 0; - - if (time_after(jiffies, msg->expires_at)) - return 1; - + if (!chunk->asoc->peer.prsctp_capable) return 0; - } if (SCTP_PR_TTL_ENABLED(chunk->sinfo.sinfo_flags) && time_after(jiffies, chunk->msg->expires_at)) { @@ -378,6 +358,10 @@ int sctp_chunk_abandoned(struct sctp_chunk *chunk) chunk->sent_count > chunk->sinfo.sinfo_timetolive) { chunk->asoc->abandoned_sent[SCTP_PR_INDEX(RTX)]++; return 1; + } else if (!SCTP_PR_POLICY(chunk->sinfo.sinfo_flags) && + chunk->msg->expires_at && + time_after(jiffies, chunk->msg->expires_at)) { + return 1; } /* PRIO policy is processed by sendmsg, not here */ diff --git a/net/sctp/output.c b/net/sctp/output.c index 84f66d5..4282b48 100644 --- a/net/sctp/output.c +++ b/net/sctp/output.c @@ -866,9 +866,6 @@ static void sctp_packet_append_data(struct sctp_packet *packet, rwnd = 0; asoc->peer.rwnd = rwnd; - /* Has been accepted for transmission. */ - if (!asoc->peer.prsctp_capable) - chunk->msg->can_abandon = 0; sctp_chunk_assign_tsn(chunk); sctp_chunk_assign_ssn(chunk); } -- 2.7.4