summaryrefslogtreecommitdiffstats
path: root/net/sctp/outqueue.c
Commit message (Collapse)AuthorAgeFilesLines
* sctp: delete the nested flexible array variableXin Long2023-04-211-4/+7
| | | | | | | | | | | | | This patch deletes the flexible-array variable[] from the structure sctp_sackhdr and sctp_errhdr to avoid some sparse warnings: # make C=2 CF="-Wflexible-array-nested" M=./net/sctp/ net/sctp/sm_statefuns.c: note: in included file (through include/net/sctp/structs.h, include/net/sctp/sctp.h): ./include/linux/sctp.h:451:28: warning: nested flexible array ./include/linux/sctp.h:393:29: warning: nested flexible array Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: clear out_curr if all frag chunks of current msg are prunedXin Long2022-11-071-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A crash was reported by Zhen Chen: list_del corruption, ffffa035ddf01c18->next is NULL WARNING: CPU: 1 PID: 250682 at lib/list_debug.c:49 __list_del_entry_valid+0x59/0xe0 RIP: 0010:__list_del_entry_valid+0x59/0xe0 Call Trace: sctp_sched_dequeue_common+0x17/0x70 [sctp] sctp_sched_fcfs_dequeue+0x37/0x50 [sctp] sctp_outq_flush_data+0x85/0x360 [sctp] sctp_outq_uncork+0x77/0xa0 [sctp] sctp_cmd_interpreter.constprop.0+0x164/0x1450 [sctp] sctp_side_effects+0x37/0xe0 [sctp] sctp_do_sm+0xd0/0x230 [sctp] sctp_primitive_SEND+0x2f/0x40 [sctp] sctp_sendmsg_to_asoc+0x3fa/0x5c0 [sctp] sctp_sendmsg+0x3d5/0x440 [sctp] sock_sendmsg+0x5b/0x70 and in sctp_sched_fcfs_dequeue() it dequeued a chunk from stream out_curr outq while this outq was empty. Normally stream->out_curr must be set to NULL once all frag chunks of current msg are dequeued, as we can see in sctp_sched_dequeue_done(). However, in sctp_prsctp_prune_unsent() as it is not a proper dequeue, sctp_sched_dequeue_done() is not called to do this. This patch is to fix it by simply setting out_curr to NULL when the last frag chunk of current msg is dequeued from out_curr stream in sctp_prsctp_prune_unsent(). Fixes: 5bbbbe32a431 ("sctp: introduce stream scheduler foundations") Reported-by: Zhen Chen <chenzhen126@huawei.com> Tested-by: Caowangbao <caowangbao@huawei.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* sctp: remove the unnecessary sinfo_stream check in sctp_prsctp_prune_unsentXin Long2022-11-071-5/+3
| | | | | | | | | | Since commit 5bbbbe32a431 ("sctp: introduce stream scheduler foundations"), sctp_stream_outq_migrate() has been called in sctp_stream_init/update to removes those chunks to streams higher than the new max. There is no longer need to do such check in sctp_prsctp_prune_unsent(). Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* sctp: count singleton chunks in assoc user statsJamie Bainbridge2022-04-051-1/+5
| | | | | | | | | | | | | | | | Singleton chunks (INIT, HEARTBEAT PMTU probes, and SHUTDOWN- COMPLETE) are not counted in SCTP_GET_ASOC_STATS "sas_octrlchunks" counter available to the assoc owner. These are all control chunks so they should be counted as such. Add counting of singleton chunks so they are properly accounted for. Fixes: 196d67593439 ("sctp: Add support to per-association statistics via a new SCTP_GET_ASSOC_STATS call") Signed-off-by: Jamie Bainbridge <jamie.bainbridge@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Link: https://lore.kernel.org/r/c9ba8785789880cf07923b8a5051e174442ea9ee.1649029663.git.jamie.bainbridge@gmail.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
* sctp: make the raise timer more simple and accurateXin Long2021-11-251-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, the probe timer is reused as the raise timer when PLPMTUD is in the Search Complete state. raise_count was introduced to count how many times the probe timer has timed out. When raise_count reaches to 30, the raise timer handler will be triggered. During the whole processing above, the timer keeps timing out every probe_ interval. It is a waste for the Search Complete state, as the raise timer only needs to time out after 30 * probe_interval. Since the raise timer and probe timer are never used at the same time, it is no need to keep probe timer 'alive' in the Search Complete state. This patch to introduce sctp_transport_reset_raise_timer() to start the timer as the raise timer when entering the Search Complete state. When entering the other states, sctp_transport_reset_probe_timer() will still be called to reset the timer to the probe timer. raise_count can be removed from sctp_transport as no need to count probe timer timeout for raise timer timeout. last_rtx_chunks can be removed as sctp_transport_reset_probe_timer() can be called in the place where asoc rtx_data_chunks is changed. Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Link: https://lore.kernel.org/r/edb0e48988ea85997488478b705b11ddc1ba724a.1637781974.git.lucien.xin@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* sctp: do the basic send and recv for PLPMTUD probeXin Long2021-06-221-2/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch does exactly what rfc8899#section-6.2.1.2 says: The SCTP sender needs to be able to determine the total size of a probe packet. The HEARTBEAT chunk could carry a Heartbeat Information parameter that includes, besides the information suggested in [RFC4960], the probe size to help an implementation associate a HEARTBEAT ACK with the size of probe that was sent. The sender could also use other methods, such as sending a nonce and verifying the information returned also contains the corresponding nonce. The length of the PAD chunk is computed by reducing the probing size by the size of the SCTP common header and the HEARTBEAT chunk. Note that HB ACK chunk will carry back whatever HB chunk carried, including the probe_size we put it in; We also check hbinfo->probe_size in the HB ACK against link->pl.probe_size to validate this HB ACK chunk. v1->v2: - Remove the unused 'sp' and add static for sctp_packet_bundle_pad(). Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: move sk_route_caps check and set into sctp_outq_flush_transportsXin Long2021-03-191-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | The sk's sk_route_caps is set in sctp_packet_config, and later it only needs to change when traversing the transport_list in a loop, as the dst might be changed in the tx path. So move sk_route_caps check and set into sctp_outq_flush_transports from sctp_packet_transmit. This also fixes a dst leak reported by Chen Yi: https://bugzilla.kernel.org/show_bug.cgi?id=212227 As calling sk_setup_caps() in sctp_packet_transmit may also set the sk_route_caps for the ctrl sock in a netns. When the netns is being deleted, the ctrl sock's releasing is later than dst dev's deleting, which will cause this dev's deleting to hang and dmesg error occurs: unregister_netdevice: waiting for xxx to become free. Usage count = 1 Reported-by: Chen Yi <yiche@redhat.com> Fixes: bcd623d8e9fa ("sctp: call sk_setup_caps in sctp_packet_transmit instead") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* treewide: Use fallthrough pseudo-keywordGustavo A. R. Silva2020-08-231-3/+3
| | | | | | | | | | Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary fall-through markings when it is the case. [1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
* sctp: add enabled check for path tracepoint loop.Kevin Kou2019-12-301-2/+3
| | | | | | | | | | | | | | | | | | | | | sctp_outq_sack is the main function handles SACK, it is called very frequently. As the commit "move trace_sctp_probe_path into sctp_outq_sack" added below code to this function, sctp tracepoint is disabled most of time, but the loop of transport list will be always called even though the tracepoint is disabled, this is unnecessary. + /* SCTP path tracepoint for congestion control debugging. */ + list_for_each_entry(transport, transport_list, transports) { + trace_sctp_probe_path(transport, asoc); + } This patch is to add tracepoint enabled check at outside of the loop of transport list, and avoid traversing the loop when trace is disabled, it is a small optimization. Signed-off-by: Kevin Kou <qdkevin.kou@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: move trace_sctp_probe_path into sctp_outq_sackKevin Kou2019-12-261-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The original patch bringed in the "SCTP ACK tracking trace event" feature was committed at Dec.20, 2017, it replaced jprobe usage with trace events, and bringed in two trace events, one is TRACE_EVENT(sctp_probe), another one is TRACE_EVENT(sctp_probe_path). The original patch intended to trigger the trace_sctp_probe_path in TRACE_EVENT(sctp_probe) as below code, +TRACE_EVENT(sctp_probe, + + TP_PROTO(const struct sctp_endpoint *ep, + const struct sctp_association *asoc, + struct sctp_chunk *chunk), + + TP_ARGS(ep, asoc, chunk), + + TP_STRUCT__entry( + __field(__u64, asoc) + __field(__u32, mark) + __field(__u16, bind_port) + __field(__u16, peer_port) + __field(__u32, pathmtu) + __field(__u32, rwnd) + __field(__u16, unack_data) + ), + + TP_fast_assign( + struct sk_buff *skb = chunk->skb; + + __entry->asoc = (unsigned long)asoc; + __entry->mark = skb->mark; + __entry->bind_port = ep->base.bind_addr.port; + __entry->peer_port = asoc->peer.port; + __entry->pathmtu = asoc->pathmtu; + __entry->rwnd = asoc->peer.rwnd; + __entry->unack_data = asoc->unack_data; + + if (trace_sctp_probe_path_enabled()) { + struct sctp_transport *sp; + + list_for_each_entry(sp, &asoc->peer.transport_addr_list, + transports) { + trace_sctp_probe_path(sp, asoc); + } + } + ), But I found it did not work when I did testing, and trace_sctp_probe_path had no output, I finally found that there is trace buffer lock operation(trace_event_buffer_reserve) in include/trace/trace_events.h: static notrace void \ trace_event_raw_event_##call(void *__data, proto) \ { \ struct trace_event_file *trace_file = __data; \ struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\ struct trace_event_buffer fbuffer; \ struct trace_event_raw_##call *entry; \ int __data_size; \ \ if (trace_trigger_soft_disabled(trace_file)) \ return; \ \ __data_size = trace_event_get_offsets_##call(&__data_offsets, args); \ \ entry = trace_event_buffer_reserve(&fbuffer, trace_file, \ sizeof(*entry) + __data_size); \ \ if (!entry) \ return; \ \ tstruct \ \ { assign; } \ \ trace_event_buffer_commit(&fbuffer); \ } The reason caused no output of trace_sctp_probe_path is that trace_sctp_probe_path written in TP_fast_assign part of TRACE_EVENT(sctp_probe), and it will be placed( { assign; } ) after the trace_event_buffer_reserve() when compiler expands Macro, entry = trace_event_buffer_reserve(&fbuffer, trace_file, \ sizeof(*entry) + __data_size); \ \ if (!entry) \ return; \ \ tstruct \ \ { assign; } \ so trace_sctp_probe_path finally can not acquire trace_event_buffer and return no output, that is to say the nest of tracepoint entry function is not allowed. The function call flow is: trace_sctp_probe() -> trace_event_raw_event_sctp_probe() -> lock buffer -> trace_sctp_probe_path() -> trace_event_raw_event_sctp_probe_path() --nested -> buffer has been locked and return no output. This patch is to remove trace_sctp_probe_path from the TP_fast_assign part of TRACE_EVENT(sctp_probe) to avoid the nest of entry function, and trigger sctp_probe_path_trace in sctp_outq_sack. After this patch, you can enable both events individually, # cd /sys/kernel/debug/tracing # echo 1 > events/sctp/sctp_probe/enable # echo 1 > events/sctp/sctp_probe_path/enable Or, you can enable all the events under sctp. # echo 1 > events/sctp/enable Signed-off-by: Kevin Kou <qdkevin.kou@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: get netns from asoc and ep baseXin Long2019-12-091-3/+3
| | | | | | | | | | | | | | | | | | 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. v1->v2: - no change. Suggested-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 104Thomas Gleixner2019-05-241-16/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Based on 1 normalized pattern(s): this sctp implementation is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 or at your option any later version this sctp implementation is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with gnu cc see the file copying if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 42 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190523091649.683323110@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* sctp: add SCTP_FUTURE_ASOC and SCTP_CURRENT_ASSOC for SCTP_STREAM_SCHEDULER ↵Xin Long2019-01-301-1/+1
| | | | | | | | | | | | | | | sockopt Check with SCTP_ALL_ASSOC instead in sctp_setsockopt_scheduler and check with SCTP_FUTURE_ASSOC instead in sctp_getsockopt_scheduler, it's compatible with 0. SCTP_CURRENT_ASSOC is supported for SCTP_STREAM_SCHEDULER in this patch. It also adds default_ss in sctp_sock to support SCTP_FUTURE_ASSOC. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: define SCTP_SS_DEFAULT for Stream schedulersXin Long2018-11-031-1/+1
| | | | | | | | | | | | According to rfc8260#section-4.3.2, SCTP_SS_DEFAULT is required to defined as SCTP_SS_FCFS or SCTP_SS_RR. SCTP_SS_FCFS is used for SCTP_SS_DEFAULT's value in this patch. Fixes: 5bbbbe32a431 ("sctp: introduce stream scheduler foundations") Reported-by: Jianwen Ji <jiji@redhat.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: count both sk and asoc sndbuf with skb truesize and sctp_chunk sizeXin Long2018-10-181-6/+2
| | | | | | | | | | | | | | | | Now it's confusing that asoc sndbuf_used is doing memory accounting with SCTP_DATA_SNDSIZE(chunk) + sizeof(sk_buff) + sizeof(sctp_chunk) while sk sk_wmem_alloc is doing that with skb->truesize + sizeof(sctp_chunk). It also causes sctp_prsctp_prune to count with a wrong freed memory when sndbuf_policy is not set. To make this right and also keep consistent between asoc sndbuf_used, sk sk_wmem_alloc and sk_wmem_queued, use skb->truesize + sizeof(sctp_chunk) for them. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: fix fall-through annotationGustavo A. R. Silva2018-10-031-1/+1
| | | | | | | | | | Replace "fallthru" with a proper "fall through" annotation. This fix is part of the ongoing efforts to enabling -Wimplicit-fallthrough Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net/sctp: Make wrappers for accessing in/out streamsKonstantin Khorenko2018-08-111-5/+6
| | | | | | | | | | | This patch introduces wrappers for accessing in/out streams indirectly. This will enable to replace physically contiguous memory arrays of streams with flexible arrays (or maybe any other appropriate mechanism) which do memory allocation on a per-page basis. Signed-off-by: Oleg Babin <obabin@virtuozzo.com> Signed-off-by: Konstantin Khorenko <khorenko@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: checkpatch fixupsMarcelo Ricardo Leitner2018-05-141-13/+7
| | | | | | | | A collection of fixups from previous patches, left for later to not introduce unnecessary changes while moving code around. Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: add asoc and packet to sctp_flush_ctxMarcelo Ricardo Leitner2018-05-141-53/+44
| | | | | | | | | | | Pre-compute these so the compiler won't reload them (due to no-strict-aliasing). Changes since v2: - Do not replace a return with a break in sctp_outq_flush_data Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: add sctp_flush_ctx, a context struct on outq_flush routinesMarcelo Ricardo Leitner2018-05-141-94/+88
| | | | | | | | With this struct we avoid passing lots of variables around and taking care of updating the current transport/packet. Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: rework switch cases in sctp_outq_flush_dataMarcelo Ricardo Leitner2018-05-141-98/+93
| | | | | | | | | | | | | Remove an inner one, which tended to be error prone due to the cascading and it can be replaced by a simple if (). Rework the outer one so that the actual flush code is not inside it. Now we first validate if we can or cannot send data, return if not, and then the flush code. Suggested-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: make use of gfp on retransmissionsMarcelo Ricardo Leitner2018-05-141-8/+9
| | | | | | | | Retransmissions may be triggered when in user context, so lets make use of gfp. Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: move transport flush code out of sctp_outq_flushMarcelo Ricardo Leitner2018-05-141-30/+26
| | | | | | | | | | | | | | To the new sctp_outq_flush_transports. Comment on Nagle is outdated and removed. Nagle is performed earlier, while checking if the chunk fits the packet: if the outq length is not enough to fill the packet, it returns SCTP_XMIT_DELAY. So by when it gets to sctp_outq_flush_transports, it has to go through all enlisted transports. Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: move flushing of data chunks out of sctp_outq_flushMarcelo Ricardo Leitner2018-05-141-74/+75
| | | | | | | | To the new sctp_outq_flush_data. Again, smaller functions and with well defined objectives. Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: move outq data rtx code out of sctp_outq_flushMarcelo Ricardo Leitner2018-05-141-43/+58
| | | | | | | | | | | | | | This patch renames current sctp_outq_flush_rtx to __sctp_outq_flush_rtx and create a new sctp_outq_flush_rtx, with the code that was on sctp_outq_flush. Again, the idea is to have functions with small and defined objectives. Yes, there is an open-coded path selection in the now sctp_outq_flush_rtx. That is kept as is for now because it may be very different when we implement retransmission path selection algorithms for CMT-SCTP. Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: move the flush of ctrl chunks into its own functionMarcelo Ricardo Leitner2018-05-141-36/+56
| | | | | | | | | | | | | | | | | | | Named sctp_outq_flush_ctrl and, with that, keep the contexts contained. One small fix embedded is the reset of one_packet at every iteration. This allows bundling of some control chunks in case they were preceeded by another control chunk that cannot be bundled. Other than this, it has the same behavior. Changes since v2: - Fixed panic reported by kbuild test robot if building with only up to this patch applied, due to bad parameter to sctp_outq_select_transport and by not initializing packet after calling sctp_outq_flush_ctrl. Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: factor out sctp_outq_select_transportMarcelo Ricardo Leitner2018-05-141-97/+90
| | | | | | | | | | | | We had two spots doing such complex operation and they were very close to each other, a bit more tailored to here or there. This patch unifies these under the same function, sctp_outq_select_transport, which knows how to handle control chunks and original transmissions (but not retransmissions). Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: add sctp_packet_singletonMarcelo Ricardo Leitner2018-05-141-7/+15
| | | | | | | | | | Factor out the code for generating singletons. It's used only once, but helps to keep the context contained. The const variables are to ease the reading of subsequent calls in there. Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: fix identification of new acks for SFR-CACCMarcelo Ricardo Leitner2018-04-251-25/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's currently written as: if (!tchunk->tsn_gap_acked) { [1] tchunk->tsn_gap_acked = 1; ... } if (TSN_lte(tsn, sack_ctsn)) { if (!tchunk->tsn_gap_acked) { /* SFR-CACC processing */ ... } } Which causes the SFR-CACC processing on ack reception to never process, as tchunk->tsn_gap_acked is always true by then. Block [1] was moved to that position by the commit marked below. This patch fixes it by doing SFR-CACC processing earlier, before tsn_gap_acked is set to true. Fixes: 31b02e154940 ("sctp: Failover transmitted list on transport delete") Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Reviewed-by: Xin Long <lucien.xin@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2018-01-171-2/+2
|\ | | | | | | | | | | | | | | Overlapping changes all over. The mini-qdisc bits were a little bit tricky, however. Signed-off-by: David S. Miller <davem@davemloft.net>
| * sctp: avoid compiler warning on implicit fallthruMarcelo Ricardo Leitner2018-01-151-2/+2
| | | | | | | | | | | | | | | | | | These fall-through are expected. Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Reviewed-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sctp: implement generate_ftsn for sctp_stream_interleaveXin Long2017-12-151-6/+6
|/ | | | | | | | | | | | | generate_ftsn is added as a member of sctp_stream_interleave, used to create fwdtsn or ifwdtsn chunk according to abandoned chunks, called in sctp_retransmit and sctp_outq_sack. sctp_generate_iftsn works for ifwdtsn, and sctp_generate_fwdtsn is still used for making fwdtsn. Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo R. Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: do not abandon the other frags in unsent outq if one msg has ↵Xin Long2017-12-011-1/+2
| | | | | | | | | | | | | | | | | | | | | | outstanding frags Now for the abandoned chunks in unsent outq, it would just free the chunks. Because no tsn is assigned to them yet, there's no need to send fwd tsn to peer, unlike for the abandoned chunks in sent outq. The problem is when parts of the msg have been sent and the other frags are still in unsent outq, if they are abandoned/dropped, the peer would never get this msg reassembled. So these frags in unsent outq can't be dropped if this msg already has outstanding frags. This patch does the check in sctp_chunk_abandoned and sctp_prsctp_prune_unsent. Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: abandon the whole msg if one part of a fragmented message is abandonedXin Long2017-12-011-4/+8
| | | | | | | | | | | | | | | | | | | | As rfc3758#section-3.1 demands: A3) When a TSN is "abandoned", if it is part of a fragmented message, all other TSN's within that fragmented message MUST be abandoned at the same time. Besides, if it couldn't handle this, the rest frags would never get assembled in peer side. This patch supports it by adding abandoned flag in sctp_datamsg, when one chunk is being abandoned, set chunk->msg->abandoned as well. Next time when checking for abandoned, go checking chunk->msg->abandoned first. Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: only update outstanding_bytes for transmitted queue when doing ↵Xin Long2017-12-011-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | prsctp_prune Now outstanding_bytes is only increased when appending chunks into one packet and sending it at 1st time, while decreased when it is about to move into retransmit queue. It means outstanding_bytes value is already decreased for all chunks in retransmit queue. However sctp_prsctp_prune_sent is a common function to check the chunks in both transmitted and retransmit queue, it decrease outstanding_bytes when moving a chunk into abandoned queue from either of them. It could cause outstanding_bytes underflow, as it also decreases it's value for the chunks in retransmit queue. This patch fixes it by only updating outstanding_bytes for transmitted queue when pruning queues for prsctp prio policy, the same fix is also needed in sctp_check_transmitted. Fixes: 8dbdf1f5b09c ("sctp: implement prsctp PRIO policy") Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: introduce stream scheduler foundationsMarcelo Ricardo Leitner2017-10-031-27/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch introduces the hooks necessary to do stream scheduling, as per RFC Draft ndata. It also introduces the first scheduler, which is what we do today but now factored out: first come first served (FCFS). With stream scheduling now we have to track which chunk was enqueued on which stream and be able to select another other than the in front of the main outqueue. So we introduce a list on sctp_stream_out_ext structure for this purpose. We reuse sctp_chunk->transmitted_list space for the list above, as the chunk cannot belong to the two lists at the same time. By using the union in there, we can have distinct names for these moments. sctp_sched_ops are the operations expected to be implemented by each scheduler. The dequeueing is a bit particular to this implementation but it is to match how we dequeue packets today. We first dequeue and then check if it fits the packet and if not, we requeue it at head. Thus why we don't have a peek operation but have dequeue_done instead, which is called once the chunk can be safely considered as transmitted. The check removed from sctp_outq_flush is now performed by sctp_stream_outq_migrate, which is only called during assoc setup. (sctp_sendmsg() also checks for it) The only operation that is foreseen but not yet added here is a way to signalize that a new packet is starting or that the packet is done, for round robin scheduler per packet, but is intentionally left to the patch that actually implements it. Support for I-DATA chunks, also described in this RFC, with user message interleaving is straightforward as it just requires the schedulers to probe for the feature and ignore datamsg boundaries when dequeueing. See-also: https://tools.ietf.org/html/draft-ietf-tsvwg-sctp-ndata-13 Tested-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: introduce struct sctp_stream_out_extMarcelo Ricardo Leitner2017-10-031-2/+2
| | | | | | | | | | | | | | | | | | | | | | With the stream schedulers, sctp_stream_out will become too big to be allocated by kmalloc and as we need to allocate with BH disabled, we cannot use __vmalloc in sctp_stream_init(). This patch moves out the stats from sctp_stream_out to sctp_stream_out_ext, which will be allocated only when the application tries to sendmsg something on it. Just the introduction of sctp_stream_out_ext would already fix the issue described above by splitting the allocation in two. Moving the stats to it also reduces the pressure on the allocator as we will ask for less memory atomically when creating the socket and we will use GFP_KERNEL later. Then, for stream schedulers, we will just use sctp_stream_out_ext. Tested-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: remove the typedef sctp_xmit_tXin Long2017-08-061-4/+4
| | | | | | | | | This patch is to remove the typedef sctp_xmit_t, and replace with enum sctp_xmit in the places where it's using this typedef. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: remove the typedef sctp_retransmit_reason_tXin Long2017-08-061-1/+1
| | | | | | | | | This patch is to remove the typedef sctp_retransmit_reason_t, and replace with enum sctp_retransmit_reason in the places where it's using this typedef. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: remove the typedef sctp_sack_variable_tXin Long2017-07-241-5/+5
| | | | | | | | | | | This patch is to remove the typedef sctp_sack_variable_t, and replace with union sctp_sack_variable in the places where it's using this typedef. It is also to fix some indents in sctp_acked(). Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: convert sk_buff.users from atomic_t to refcount_tReshetova, Elena2017-07-011-1/+1
| | | | | | | | | | | | | | refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: David Windsor <dwindsor@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: define the member stream as an object instead of pointer in asocXin Long2017-06-021-5/+5
| | | | | | | | | | | As Marcelo's suggestion, stream is a fixed size member of asoc and would not grow with more streams. To avoid an allocation for it, this patch is to define it as an object instead of pointer and update the places using it, also create sctp_stream_update() called in sctp_assoc_update() to migrate the stream info from one stream to another. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2017-04-061-2/+1
|\ | | | | | | | | | | | | Mostly simple cases of overlapping changes (adding code nearby, a function whose name changes, for example). Signed-off-by: David S. Miller <davem@davemloft.net>
| * sctp: use right in and out stream cntXin Long2017-04-011-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | Since sctp reconf was added in sctp, the real cnt of in/out stream have not been c.sinit_max_instreams and c.sinit_num_ostreams any more. This patch is to replace them with stream->in/outcnt. Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sctp: add SCTP_PR_STREAM_STATUS sockopt for prsctpXin Long2017-04-031-0/+10
|/ | | | | | | | | | | | | | | | | | Before when implementing sctp prsctp, SCTP_PR_STREAM_STATUS wasn't added, as it needs to save abandoned_(un)sent for every stream. After sctp stream reconf is added in sctp, assoc has structure sctp_stream_out to save per stream info. This patch is to add SCTP_PR_STREAM_STATUS by putting the prsctp per stream statistics into sctp_stream_out. v1->v2: fix an indent issue. Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: out_qlen should be updated when pruning unsent queueXin Long2017-03-211-6/+5
| | | | | | | | | | This patch is to fix the issue that sctp_prsctp_prune_sent forgot to update q->out_qlen when removing a chunk from unsent queue. Fixes: 8dbdf1f5b09c ("sctp: implement prsctp PRIO policy") Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: add dst_pending_confirm flagJulian Anastasov2017-02-071-1/+1
| | | | | | | | | | | | | | | | Add new transport flag to allow sockets to confirm neighbour. When same struct dst_entry can be used for many different neighbours we can not use it for pending confirmations. The flag is propagated from transport to every packet. It is reset when cached dst is reset. Reported-by: YueHaibing <yuehaibing@huawei.com> Fixes: 5110effee8fd ("net: Do delayed neigh confirmation.") Fixes: f2bb4bedf35d ("ipv4: Cache output routes in fib_info nexthops.") Signed-off-by: Julian Anastasov <ja@ssi.bg> Acked-by: Eric Dumazet <edumazet@google.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: implement sender-side procedures for SSN Reset Request ParameterXin Long2017-01-181-10/+23
| | | | | | | | | | | | | | | | This patch is to implement sender-side procedures for the Outgoing and Incoming SSN Reset Request Parameter described in rfc6525 section 5.1.2 and 5.1.3. It is also add sockopt SCTP_RESET_STREAMS in rfc6525 section 6.3.2 for users. Note that the new asoc member strreset_outstanding is to make sure only one reconf request chunk on the fly as rfc6525 section 5.1.1 demands. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: Fix spelling mistake: "Atempt" -> "Attempt"Colin Ian King2017-01-111-1/+1
| | | | | | | | Trivial fix to spelling mistake in WARN_ONCE message Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: reuse sent_count to avoid retransmitted chunks for RTT measurementsXin Long2016-10-131-3/+1
| | | | | | | | | | | | | | | Now sctp uses chunk->resent to record if a chunk is retransmitted, for RTT measurements with retransmitted DATA chunks. chunk->sent_count was introduced to record how many times one chunk has been sent for prsctp RTX policy before. We actually can know if one chunk is retransmitted by checking chunk->sent_count is greater than 1. This patch is to remove resent from sctp_chunk and reuse sent_count to avoid retransmitted chunks for RTT measurements. Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 11:30:13 +0000