On Mon, Nov 25, 2019 at 11:59:50AM +0800, Xin Long wrote: > Commit 312434617cb1 ("sctp: cache netns in sctp_ep_common") set netns > in asoc and ep base since they're created, and it will never change. > It's a better way to get netns from asoc and ep base, comparing to > calling sock_net(). > > This patch is to replace them. > I don't see anything expressly wrong with this, but I'm not sure I see it as better either. It makes things more consistent with commit 312434617cb1, sure, but both sock_net, and its called read_pnet are both static inline functions, so it should reduce to the same thing. In fact, I think it may be better to ammend the fix from 312434617cb1, to, instead of caching the net structure in the ep_common struct, instead, update sctp_assoc_migrate so that the new value base.sk is atomically exchanged before any calls to sock_put/sock_hold are made, so that the rhashtable lookup is consistent. That would allow us to consistently use sock_net the way other protocols do Neil > Suggested-by: Marcelo Ricardo Leitner <marcelo.leitner@xxxxxxxxx> > Signed-off-by: Xin Long <lucien.xin@xxxxxxxxx> > --- > net/sctp/associola.c | 10 +++++----- > net/sctp/chunk.c | 2 +- > net/sctp/endpointola.c | 6 +++--- > net/sctp/input.c | 5 ++--- > net/sctp/output.c | 2 +- > net/sctp/outqueue.c | 6 +++--- > net/sctp/sm_make_chunk.c | 7 +++---- > net/sctp/sm_sideeffect.c | 16 ++++++---------- > net/sctp/sm_statefuns.c | 2 +- > net/sctp/socket.c | 12 +++++------- > net/sctp/stream.c | 3 +-- > net/sctp/stream_interleave.c | 23 ++++++++++------------- > net/sctp/transport.c | 2 +- > net/sctp/ulpqueue.c | 15 +++++++-------- > 14 files changed, 49 insertions(+), 62 deletions(-) > > diff --git a/net/sctp/associola.c b/net/sctp/associola.c > index 41839b8..a725f53 100644 > --- a/net/sctp/associola.c > +++ b/net/sctp/associola.c > @@ -579,7 +579,6 @@ struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc, > const gfp_t gfp, > const int peer_state) > { > - struct net *net = sock_net(asoc->base.sk); > struct sctp_transport *peer; > struct sctp_sock *sp; > unsigned short port; > @@ -609,7 +608,7 @@ struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc, > return peer; > } > > - peer = sctp_transport_new(net, addr, gfp); > + peer = sctp_transport_new(asoc->base.net, addr, gfp); > if (!peer) > return NULL; > > @@ -978,7 +977,7 @@ static void sctp_assoc_bh_rcv(struct work_struct *work) > struct sctp_association *asoc = > container_of(work, struct sctp_association, > base.inqueue.immediate); > - struct net *net = sock_net(asoc->base.sk); > + struct net *net = asoc->base.net; > union sctp_subtype subtype; > struct sctp_endpoint *ep; > struct sctp_chunk *chunk; > @@ -1446,7 +1445,8 @@ void sctp_assoc_sync_pmtu(struct sctp_association *asoc) > /* Should we send a SACK to update our peer? */ > static inline bool sctp_peer_needs_update(struct sctp_association *asoc) > { > - struct net *net = sock_net(asoc->base.sk); > + struct net *net = asoc->base.net; > + > switch (asoc->state) { > case SCTP_STATE_ESTABLISHED: > case SCTP_STATE_SHUTDOWN_PENDING: > @@ -1580,7 +1580,7 @@ int sctp_assoc_set_bind_addr_from_ep(struct sctp_association *asoc, > if (asoc->peer.ipv6_address) > flags |= SCTP_ADDR6_PEERSUPP; > > - return sctp_bind_addr_copy(sock_net(asoc->base.sk), > + return sctp_bind_addr_copy(asoc->base.net, > &asoc->base.bind_addr, > &asoc->ep->base.bind_addr, > scope, gfp, flags); > diff --git a/net/sctp/chunk.c b/net/sctp/chunk.c > index cc0405c..064675b 100644 > --- a/net/sctp/chunk.c > +++ b/net/sctp/chunk.c > @@ -227,7 +227,7 @@ struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *asoc, > if (msg_len >= first_len) { > msg->can_delay = 0; > if (msg_len > first_len) > - SCTP_INC_STATS(sock_net(asoc->base.sk), > + SCTP_INC_STATS(asoc->base.net, > SCTP_MIB_FRAGUSRMSGS); > } else { > /* Which may be the only one... */ > diff --git a/net/sctp/endpointola.c b/net/sctp/endpointola.c > index 3067deb..6e7e0d3 100644 > --- a/net/sctp/endpointola.c > +++ b/net/sctp/endpointola.c > @@ -244,7 +244,7 @@ struct sctp_endpoint *sctp_endpoint_is_match(struct sctp_endpoint *ep, > struct sctp_endpoint *retval = NULL; > > if ((htons(ep->base.bind_addr.port) == laddr->v4.sin_port) && > - net_eq(sock_net(ep->base.sk), net)) { > + net_eq(ep->base.net, net)) { > if (sctp_bind_addr_match(&ep->base.bind_addr, laddr, > sctp_sk(ep->base.sk))) > retval = ep; > @@ -292,8 +292,8 @@ bool sctp_endpoint_is_peeled_off(struct sctp_endpoint *ep, > const union sctp_addr *paddr) > { > struct sctp_sockaddr_entry *addr; > + struct net *net = ep->base.net; > struct sctp_bind_addr *bp; > - struct net *net = sock_net(ep->base.sk); > > bp = &ep->base.bind_addr; > /* This function is called with the socket lock held, > @@ -384,7 +384,7 @@ static void sctp_endpoint_bh_rcv(struct work_struct *work) > if (asoc && sctp_chunk_is_data(chunk)) > asoc->peer.last_data_from = chunk->transport; > else { > - SCTP_INC_STATS(sock_net(ep->base.sk), SCTP_MIB_INCTRLCHUNKS); > + SCTP_INC_STATS(ep->base.net, SCTP_MIB_INCTRLCHUNKS); > if (asoc) > asoc->stats.ictrlchunks++; > } > diff --git a/net/sctp/input.c b/net/sctp/input.c > index 4d2bcfc..efaaefc 100644 > --- a/net/sctp/input.c > +++ b/net/sctp/input.c > @@ -937,7 +937,7 @@ int sctp_hash_transport(struct sctp_transport *t) > if (t->asoc->temp) > return 0; > > - arg.net = sock_net(t->asoc->base.sk); > + arg.net = t->asoc->base.net; > arg.paddr = &t->ipaddr; > arg.lport = htons(t->asoc->base.bind_addr.port); > > @@ -1004,12 +1004,11 @@ struct sctp_transport *sctp_epaddr_lookup_transport( > const struct sctp_endpoint *ep, > const union sctp_addr *paddr) > { > - struct net *net = sock_net(ep->base.sk); > struct rhlist_head *tmp, *list; > struct sctp_transport *t; > struct sctp_hash_cmp_arg arg = { > .paddr = paddr, > - .net = net, > + .net = ep->base.net, > .lport = htons(ep->base.bind_addr.port), > }; > > diff --git a/net/sctp/output.c b/net/sctp/output.c > index dbda7e7..1441eaf 100644 > --- a/net/sctp/output.c > +++ b/net/sctp/output.c > @@ -282,7 +282,7 @@ static enum sctp_xmit sctp_packet_bundle_sack(struct sctp_packet *pkt, > sctp_chunk_free(sack); > goto out; > } > - SCTP_INC_STATS(sock_net(asoc->base.sk), > + SCTP_INC_STATS(asoc->base.net, > SCTP_MIB_OUTCTRLCHUNKS); > asoc->stats.octrlchunks++; > asoc->peer.sack_needed = 0; > diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c > index 0dab62b..a031d11 100644 > --- a/net/sctp/outqueue.c > +++ b/net/sctp/outqueue.c > @@ -279,7 +279,7 @@ void sctp_outq_free(struct sctp_outq *q) > /* Put a new chunk in an sctp_outq. */ > void sctp_outq_tail(struct sctp_outq *q, struct sctp_chunk *chunk, gfp_t gfp) > { > - struct net *net = sock_net(q->asoc->base.sk); > + struct net *net = q->asoc->base.net; > > pr_debug("%s: outq:%p, chunk:%p[%s]\n", __func__, q, chunk, > chunk && chunk->chunk_hdr ? > @@ -533,7 +533,7 @@ void sctp_retransmit_mark(struct sctp_outq *q, > void sctp_retransmit(struct sctp_outq *q, struct sctp_transport *transport, > enum sctp_retransmit_reason reason) > { > - struct net *net = sock_net(q->asoc->base.sk); > + struct net *net = q->asoc->base.net; > > switch (reason) { > case SCTP_RTXR_T3_RTX: > @@ -1884,6 +1884,6 @@ void sctp_generate_fwdtsn(struct sctp_outq *q, __u32 ctsn) > > if (ftsn_chunk) { > list_add_tail(&ftsn_chunk->list, &q->control_chunk_list); > - SCTP_INC_STATS(sock_net(asoc->base.sk), SCTP_MIB_OUTCTRLCHUNKS); > + SCTP_INC_STATS(asoc->base.net, SCTP_MIB_OUTCTRLCHUNKS); > } > } > diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c > index 48d6395..09050c1 100644 > --- a/net/sctp/sm_make_chunk.c > +++ b/net/sctp/sm_make_chunk.c > @@ -2307,7 +2307,6 @@ int sctp_process_init(struct sctp_association *asoc, struct sctp_chunk *chunk, > const union sctp_addr *peer_addr, > struct sctp_init_chunk *peer_init, gfp_t gfp) > { > - struct net *net = sock_net(asoc->base.sk); > struct sctp_transport *transport; > struct list_head *pos, *temp; > union sctp_params param; > @@ -2363,8 +2362,8 @@ int sctp_process_init(struct sctp_association *asoc, struct sctp_chunk *chunk, > * also give us an option to silently ignore the packet, which > * is what we'll do here. > */ > - if (!net->sctp.addip_noauth && > - (asoc->peer.asconf_capable && !asoc->peer.auth_capable)) { > + if (!asoc->base.net->sctp.addip_noauth && > + (asoc->peer.asconf_capable && !asoc->peer.auth_capable)) { > asoc->peer.addip_disabled_mask |= (SCTP_PARAM_ADD_IP | > SCTP_PARAM_DEL_IP | > SCTP_PARAM_SET_PRIMARY); > @@ -2491,9 +2490,9 @@ static int sctp_process_param(struct sctp_association *asoc, > const union sctp_addr *peer_addr, > gfp_t gfp) > { > - struct net *net = sock_net(asoc->base.sk); > struct sctp_endpoint *ep = asoc->ep; > union sctp_addr_param *addr_param; > + struct net *net = asoc->base.net; > struct sctp_transport *t; > enum sctp_scope scope; > union sctp_addr addr; > diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c > index e52b212..20b0281 100644 > --- a/net/sctp/sm_sideeffect.c > +++ b/net/sctp/sm_sideeffect.c > @@ -516,8 +516,6 @@ static void sctp_do_8_2_transport_strike(struct sctp_cmd_seq *commands, > struct sctp_transport *transport, > int is_hb) > { > - struct net *net = sock_net(asoc->base.sk); > - > /* The check for association's overall error counter exceeding the > * threshold is done in the state function. > */ > @@ -544,10 +542,10 @@ static void sctp_do_8_2_transport_strike(struct sctp_cmd_seq *commands, > * is SCTP_ACTIVE, then mark this transport as Partially Failed, > * see SCTP Quick Failover Draft, section 5.1 > */ > - if (net->sctp.pf_enable && > - (transport->state == SCTP_ACTIVE) && > - (transport->error_count < transport->pathmaxrxt) && > - (transport->error_count > transport->pf_retrans)) { > + if (asoc->base.net->sctp.pf_enable && > + transport->state == SCTP_ACTIVE && > + transport->error_count < transport->pathmaxrxt && > + transport->error_count > transport->pf_retrans) { > > sctp_assoc_control_transport(asoc, transport, > SCTP_TRANSPORT_PF, > @@ -793,10 +791,8 @@ static int sctp_cmd_process_sack(struct sctp_cmd_seq *cmds, > int err = 0; > > if (sctp_outq_sack(&asoc->outqueue, chunk)) { > - struct net *net = sock_net(asoc->base.sk); > - > /* There are no more TSNs awaiting SACK. */ > - err = sctp_do_sm(net, SCTP_EVENT_T_OTHER, > + err = sctp_do_sm(asoc->base.net, SCTP_EVENT_T_OTHER, > SCTP_ST_OTHER(SCTP_EVENT_NO_PENDING_TSN), > asoc->state, asoc->ep, asoc, NULL, > GFP_ATOMIC); > @@ -829,7 +825,7 @@ static void sctp_cmd_assoc_update(struct sctp_cmd_seq *cmds, > struct sctp_association *asoc, > struct sctp_association *new) > { > - struct net *net = sock_net(asoc->base.sk); > + struct net *net = asoc->base.net; > struct sctp_chunk *abort; > > if (!sctp_assoc_update(asoc, new)) > diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c > index 4ab8208..42558fa 100644 > --- a/net/sctp/sm_statefuns.c > +++ b/net/sctp/sm_statefuns.c > @@ -1320,7 +1320,7 @@ static int sctp_sf_check_restart_addrs(const struct sctp_association *new_asoc, > struct sctp_chunk *init, > struct sctp_cmd_seq *commands) > { > - struct net *net = sock_net(new_asoc->base.sk); > + struct net *net = new_asoc->base.net; > struct sctp_transport *new_addr; > int ret = 1; > > diff --git a/net/sctp/socket.c b/net/sctp/socket.c > index ffd3262..5e0efbc 100644 > --- a/net/sctp/socket.c > +++ b/net/sctp/socket.c > @@ -436,8 +436,7 @@ static int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len) > static int sctp_send_asconf(struct sctp_association *asoc, > struct sctp_chunk *chunk) > { > - struct net *net = sock_net(asoc->base.sk); > - int retval = 0; > + int retval = 0; > > /* If there is an outstanding ASCONF chunk, queue it for later > * transmission. > @@ -449,7 +448,7 @@ static int sctp_send_asconf(struct sctp_association *asoc, > > /* Hold the chunk until an ASCONF_ACK is received. */ > sctp_chunk_hold(chunk); > - retval = sctp_primitive_ASCONF(net, asoc, chunk); > + retval = sctp_primitive_ASCONF(asoc->base.net, asoc, chunk); > if (retval) > sctp_chunk_free(chunk); > else > @@ -2428,9 +2427,8 @@ static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params, > int error; > > if (params->spp_flags & SPP_HB_DEMAND && trans) { > - struct net *net = sock_net(trans->asoc->base.sk); > - > - error = sctp_primitive_REQUESTHEARTBEAT(net, trans->asoc, trans); > + error = sctp_primitive_REQUESTHEARTBEAT(trans->asoc->base.net, > + trans->asoc, trans); > if (error) > return error; > } > @@ -5308,7 +5306,7 @@ struct sctp_transport *sctp_transport_get_next(struct net *net, > if (!sctp_transport_hold(t)) > continue; > > - if (net_eq(sock_net(t->asoc->base.sk), net) && > + if (net_eq(t->asoc->base.net, net) && > t->asoc->peer.primary_path == t) > break; > > diff --git a/net/sctp/stream.c b/net/sctp/stream.c > index e83cdaa..df60b5e 100644 > --- a/net/sctp/stream.c > +++ b/net/sctp/stream.c > @@ -218,10 +218,9 @@ void sctp_stream_update(struct sctp_stream *stream, struct sctp_stream *new) > static int sctp_send_reconf(struct sctp_association *asoc, > struct sctp_chunk *chunk) > { > - struct net *net = sock_net(asoc->base.sk); > int retval = 0; > > - retval = sctp_primitive_RECONF(net, asoc, chunk); > + retval = sctp_primitive_RECONF(asoc->base.net, asoc, chunk); > if (retval) > sctp_chunk_free(chunk); > > diff --git a/net/sctp/stream_interleave.c b/net/sctp/stream_interleave.c > index 40c40be..6b13f73 100644 > --- a/net/sctp/stream_interleave.c > +++ b/net/sctp/stream_interleave.c > @@ -241,9 +241,8 @@ static struct sctp_ulpevent *sctp_intl_retrieve_partial( > if (!first_frag) > return NULL; > > - retval = sctp_make_reassembled_event(sock_net(ulpq->asoc->base.sk), > - &ulpq->reasm, first_frag, > - last_frag); > + retval = sctp_make_reassembled_event(ulpq->asoc->base.net, &ulpq->reasm, > + first_frag, last_frag); > if (retval) { > sin->fsn = next_fsn; > if (is_last) { > @@ -326,7 +325,7 @@ static struct sctp_ulpevent *sctp_intl_retrieve_reassembled( > > pd_point = sctp_sk(asoc->base.sk)->pd_point; > if (pd_point && pd_point <= pd_len) { > - retval = sctp_make_reassembled_event(sock_net(asoc->base.sk), > + retval = sctp_make_reassembled_event(asoc->base.net, > &ulpq->reasm, > pd_first, pd_last); > if (retval) { > @@ -337,8 +336,7 @@ static struct sctp_ulpevent *sctp_intl_retrieve_reassembled( > goto out; > > found: > - retval = sctp_make_reassembled_event(sock_net(asoc->base.sk), > - &ulpq->reasm, > + retval = sctp_make_reassembled_event(asoc->base.net, &ulpq->reasm, > first_frag, pos); > if (retval) > retval->msg_flags |= MSG_EOR; > @@ -630,7 +628,7 @@ static struct sctp_ulpevent *sctp_intl_retrieve_partial_uo( > if (!first_frag) > return NULL; > > - retval = sctp_make_reassembled_event(sock_net(ulpq->asoc->base.sk), > + retval = sctp_make_reassembled_event(ulpq->asoc->base.net, > &ulpq->reasm_uo, first_frag, > last_frag); > if (retval) { > @@ -716,7 +714,7 @@ static struct sctp_ulpevent *sctp_intl_retrieve_reassembled_uo( > > pd_point = sctp_sk(asoc->base.sk)->pd_point; > if (pd_point && pd_point <= pd_len) { > - retval = sctp_make_reassembled_event(sock_net(asoc->base.sk), > + retval = sctp_make_reassembled_event(asoc->base.net, > &ulpq->reasm_uo, > pd_first, pd_last); > if (retval) { > @@ -727,8 +725,7 @@ static struct sctp_ulpevent *sctp_intl_retrieve_reassembled_uo( > goto out; > > found: > - retval = sctp_make_reassembled_event(sock_net(asoc->base.sk), > - &ulpq->reasm_uo, > + retval = sctp_make_reassembled_event(asoc->base.net, &ulpq->reasm_uo, > first_frag, pos); > if (retval) > retval->msg_flags |= MSG_EOR; > @@ -814,7 +811,7 @@ static struct sctp_ulpevent *sctp_intl_retrieve_first_uo(struct sctp_ulpq *ulpq) > return NULL; > > out: > - retval = sctp_make_reassembled_event(sock_net(ulpq->asoc->base.sk), > + retval = sctp_make_reassembled_event(ulpq->asoc->base.net, > &ulpq->reasm_uo, first_frag, > last_frag); > if (retval) { > @@ -921,7 +918,7 @@ static struct sctp_ulpevent *sctp_intl_retrieve_first(struct sctp_ulpq *ulpq) > return NULL; > > out: > - retval = sctp_make_reassembled_event(sock_net(ulpq->asoc->base.sk), > + retval = sctp_make_reassembled_event(ulpq->asoc->base.net, > &ulpq->reasm, first_frag, > last_frag); > if (retval) { > @@ -1159,7 +1156,7 @@ static void sctp_generate_iftsn(struct sctp_outq *q, __u32 ctsn) > > if (ftsn_chunk) { > list_add_tail(&ftsn_chunk->list, &q->control_chunk_list); > - SCTP_INC_STATS(sock_net(asoc->base.sk), SCTP_MIB_OUTCTRLCHUNKS); > + SCTP_INC_STATS(asoc->base.net, SCTP_MIB_OUTCTRLCHUNKS); > } > } > > diff --git a/net/sctp/transport.c b/net/sctp/transport.c > index 7235a60..f4de064 100644 > --- a/net/sctp/transport.c > +++ b/net/sctp/transport.c > @@ -334,7 +334,7 @@ void sctp_transport_update_rto(struct sctp_transport *tp, __u32 rtt) > pr_debug("%s: rto_pending not set on transport %p!\n", __func__, tp); > > if (tp->rttvar || tp->srtt) { > - struct net *net = sock_net(tp->asoc->base.sk); > + struct net *net = tp->asoc->base.net; > /* 6.3.1 C3) When a new RTT measurement R' is made, set > * RTTVAR <- (1 - RTO.Beta) * RTTVAR + RTO.Beta * |SRTT - R'| > * SRTT <- (1 - RTO.Alpha) * SRTT + RTO.Alpha * R' > diff --git a/net/sctp/ulpqueue.c b/net/sctp/ulpqueue.c > index b6536b7..1c6c640 100644 > --- a/net/sctp/ulpqueue.c > +++ b/net/sctp/ulpqueue.c > @@ -486,10 +486,9 @@ static struct sctp_ulpevent *sctp_ulpq_retrieve_reassembled(struct sctp_ulpq *ul > cevent = sctp_skb2event(pd_first); > pd_point = sctp_sk(asoc->base.sk)->pd_point; > if (pd_point && pd_point <= pd_len) { > - retval = sctp_make_reassembled_event(sock_net(asoc->base.sk), > + retval = sctp_make_reassembled_event(asoc->base.net, > &ulpq->reasm, > - pd_first, > - pd_last); > + pd_first, pd_last); > if (retval) > sctp_ulpq_set_pd(ulpq); > } > @@ -497,7 +496,7 @@ static struct sctp_ulpevent *sctp_ulpq_retrieve_reassembled(struct sctp_ulpq *ul > done: > return retval; > found: > - retval = sctp_make_reassembled_event(sock_net(ulpq->asoc->base.sk), > + retval = sctp_make_reassembled_event(ulpq->asoc->base.net, > &ulpq->reasm, first_frag, pos); > if (retval) > retval->msg_flags |= MSG_EOR; > @@ -563,8 +562,8 @@ static struct sctp_ulpevent *sctp_ulpq_retrieve_partial(struct sctp_ulpq *ulpq) > * further. > */ > done: > - retval = sctp_make_reassembled_event(sock_net(ulpq->asoc->base.sk), > - &ulpq->reasm, first_frag, last_frag); > + retval = sctp_make_reassembled_event(ulpq->asoc->base.net, &ulpq->reasm, > + first_frag, last_frag); > if (retval && is_last) > retval->msg_flags |= MSG_EOR; > > @@ -664,8 +663,8 @@ static struct sctp_ulpevent *sctp_ulpq_retrieve_first(struct sctp_ulpq *ulpq) > * further. > */ > done: > - retval = sctp_make_reassembled_event(sock_net(ulpq->asoc->base.sk), > - &ulpq->reasm, first_frag, last_frag); > + retval = sctp_make_reassembled_event(ulpq->asoc->base.net, &ulpq->reasm, > + first_frag, last_frag); > return retval; > } > > -- > 2.1.0 > >