Cross Reference: /net/sctp/outqueue.c

History log of /net/sctp/outqueue.c
Revision	Date	Author	Comments
526cbef778ad8e763b95608d7e5c988b96bf4af5	22-Jul-2014	David Laight <David.Laight@ACULAB.COM>	net: sctp: Rename SCTP_XMIT_NAGLE_DELAY to SCTP_XMIT_DELAY MSG_MORE and 'corking' a socket would require that the transmit of a data chunk be delayed. Rename the return value to be less specific. Signed-off-by: David Laight <david.laight@aculab.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
138ce9102468ef3ad42214b2878004522f357a2a	14-Jul-2014	Fabian Frederick <fabf@skynet.be>	net: sctp: remove unnecessary break after return/goto Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: David S. Miller <davem@davemloft.net>
619a60ee04be33238721a15c1f9704a2a515a33e	02-Jan-2014	Vlad Yasevich <vyasevich@gmail.com>	sctp: Remove outqueue empty state The SCTP outqueue structure maintains a data chunks that are pending transmission, the list of chunks that are pending a retransmission and a length of data in flight. It also tries to keep the emtpy state so that it can performe shutdown sequence or notify user. The problem is that the empy state is inconsistently tracked. It is possible to completely drain the queue without sending anything when using PR-SCTP. In this case, the empty state will not be correctly state as report by Jamal Hadi Salim <jhs@mojatatu.com>. This can cause an association to be perminantly stuck in the SHUTDOWN_PENDING state. Additionally, SCTP is incredibly inefficient when setting the empty state. Even though all the data is availaible in the outqueue structure, we ignore it and walk a list of trasnports. In the end, we can completely remove the extra empty state and figure out if the queue is empty by looking at 3 things: length of pending data, length of in-flight data, and exisiting of retransmit data. All of these are already in the strucutre. Reported-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Vlad Yasevich <vyasevich@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Tested-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
cb3f837ba95d7774978e86fc17ddf970cf7d15a4	22-Dec-2013	wangweidong <wangweidong1@huawei.com>	sctp: fix checkpatch errors with space required or prohibited fix checkpatch errors while the space is required or prohibited to the "=,()++..." Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Wang Weidong <wangweidong1@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
4b2f13a25133b115eb56771bd4a8e71a82aea968	06-Dec-2013	Jeff Kirsher <jeffrey.t.kirsher@intel.com>	sctp: Fix FSF address in file headers Several files refer to an old address for the Free Software Foundation in the file header comment. Resolve by replacing the address with the URL <http://www.gnu.org/licenses/> so that we do not have to keep updating the header comments anytime the address changes. CC: Vlad Yasevich <vyasevich@gmail.com> CC: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
6eabca54d6781f61c7318517c1463a098acb7a87	25-Nov-2013	Xufeng Zhang <xufeng.zhang@windriver.com>	sctp: Restore 'resent' bit to avoid retransmitted chunks for RTT measurements Currently retransmitted DATA chunks could also be used for RTT measurements since there are no flag to identify whether the transmitted DATA chunk is a new one or a retransmitted one. This problem is introduced by commit ae19c5486 ("sctp: remove 'resent' bit from the chunk") which inappropriately removed the 'resent' bit completely, instead of doing this, we should set the resent bit only for the retransmitted DATA chunks. Signed-off-by: Xufeng Zhang <xufeng.zhang@windriver.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
d6c416148545bd99d3cc05e672460168245cc156	21-Nov-2013	Chang Xiangzhong <changxiangzhong@gmail.com>	net: sctp: find the correct highest_new_tsn in sack Function sctp_check_transmitted(transport t, ...) would iterate all of transport->transmitted queue and looking for the highest __newly__ acked tsn. The original algorithm would depend on the order of the assoc->transport_list (in function sctp_outq_sack line 1215 - 1226). The result might not be the expected due to the order of the tranport_list. Solution: checking if the exising is smaller than the new one before assigning Signed-off-by: Chang Xiangzhong <changxiangzhong@gmail.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
477143e3fece3dc12629bb1ebd7b47e8e6e72b2b	06-Aug-2013	Daniel Borkmann <dborkman@redhat.com>	net: sctp: trivial: update bug report in header comment With the restructuring of the lksctp.org site, we only allow bug reports through the SCTP mailing list linux-sctp@vger.kernel.org, not via SF, as SF is only used for web hosting and nothing more. While at it, also remove the obvious statement that bugs will be fixed and incooperated into the kernel. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
91705c61b52029ab5da67a15a23eef08667bf40e	23-Jul-2013	Daniel Borkmann <dborkman@redhat.com>	net: sctp: trivial: update mailing list address The SCTP mailing list address to send patches or questions to is linux-sctp@vger.kernel.org and not lksctp-developers@lists.sourceforge.net anymore. Therefore, update all occurences. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
8c2f414ad1b3aa3af05791cd7312eb8ff9d80e0d	09-Jul-2013	Daniel Borkmann <dborkman@redhat.com>	net: sctp: confirm route during forward progress This fix has been proposed originally by Vlad Yasevich. He says: When SCTP makes forward progress (receives a SACK that acks new chunks, renegs, or answeres 0-window probes) or when HB-ACK arrives, mark the route as confirmed so we don't unnecessarily send NUD probes. Having a simple SCTP client/server that exchange data chunks every 1sec, without this patch ARP requests are sent periodically every 40-60sec. With this fix applied, an ARP request is only done once right at the "session" beginning. Also, when clearing the related ARP cache entry manually during the session, a new request is correctly done. I have only "backported" this to net-next and tested that it works, so full credit goes to Vlad. Signed-off-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
e02010adeeb21ef56d6b9b68c785ed1ecc832aee	01-Jul-2013	Daniel Borkmann <dborkman@redhat.com>	net: sctp: get rid of SCTP_DBG_TSNS entirely After having reworked the debugging framework, Neil and Vlad agreed to get rid of the leftover SCTP_DBG_TSNS code for a couple of reasons: We can use systemtap scripts to investigate these things, we now have pr_debug() helpers that make life easier, and if we really need anything else besides those tools, we will be forced to come up with something better than we have there. Therefore, get rid of this ifdef debugging code entirely for now. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> CC: Vlad Yasevich <vyasevich@gmail.com> CC: Neil Horman <nhorman@tuxdriver.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
bb33381d0c97cdee25f2cdab540b6e2bd16fa03b	28-Jun-2013	Daniel Borkmann <dborkman@redhat.com>	net: sctp: rework debugging framework to use pr_debug and friends We should get rid of all own SCTP debug printk macros and use the ones that the kernel offers anyway instead. This makes the code more readable and conform to the kernel code, and offers all the features of dynamic debbuging that pr_debug() et al has, such as only turning on/off portions of debug messages at runtime through debugfs. The runtime cost of having CONFIG_DYNAMIC_DEBUG enabled, but none of the debug statements printing, is negligible [1]. If kernel debugging is completly turned off, then these statements will also compile into "empty" functions. While we're at it, we also need to change the Kconfig option as it /now/ only refers to the ifdef'ed code portions in outqueue.c that enable further debugging/tracing of SCTP transaction fields. Also, since SCTP_ASSERT code was enabled with this Kconfig option and has now been removed, we transform those code parts into WARNs resp. where appropriate BUG_ONs so that those bugs can be more easily detected as probably not many people have SCTP debugging permanently turned on. To turn on all SCTP debugging, the following steps are needed: # mount -t debugfs none /sys/kernel/debug # echo -n 'module sctp +p' > /sys/kernel/debug/dynamic_debug/control This can be done more fine-grained on a per file, per line basis and others as described in [2]. [1] https://www.kernel.org/doc/ols/2009/ols2009-pages-39-46.pdf [2] Documentation/dynamic-debug-howto.txt Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
c5c7774d7eb4397891edca9ebdf750ba90977a69	12-Jun-2013	Neil Horman <nhorman@tuxdriver.com>	sctp: fully initialize sctp_outq in sctp_outq_init In commit 2f94aabd9f6c925d77aecb3ff020f1cc12ed8f86 (refactor sctp_outq_teardown to insure proper re-initalization) we modified sctp_outq_teardown to use sctp_outq_init to fully re-initalize the outq structure. Steve West recently asked me why I removed the q->error = 0 initalization from sctp_outq_teardown. I did so because I was operating under the impression that sctp_outq_init would properly initalize that value for us, but it doesn't. sctp_outq_init operates under the assumption that the outq struct is all 0's (as it is when called from sctp_association_init), but using it in __sctp_outq_teardown violates that assumption. We should do a memset in sctp_outq_init to ensure that the entire structure is in a known state there instead. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Reported-by: "West, Steve (NSN - US/Fort Worth)" <steve.west@nsn.com> CC: Vlad Yasevich <vyasevich@gmail.com> CC: netdev@vger.kernel.org CC: davem@davemloft.net Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
dacda32ee694d9139c336c5e1cdfb826f6296186	16-Apr-2013	Daniel Borkmann <dborkman@redhat.com>	net: sctp: outqueue: simplify sctp_outq_uncork function Just a minor edit to simplify the function. No need for this error variable here. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
165a4c31278c980862b2c2ddec408cf30341f3ec	16-Apr-2013	Daniel Borkmann <dborkman@redhat.com>	net: sctp: sctp_outq: remove 'malloced' from its struct sctp_outq is embedded into sctp_association, and thus never kmalloced in any way. Also, malloced is always 0, thus kfree() is never called. Therefore, remove that dead piece of code. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
25cc4ae913a46bcc11b03c37bec59568f2122a36	03-Feb-2013	Ying Xue <ying.xue@windriver.com>	net: remove redundant check for timer pending state before del_timer As in del_timer() there has already placed a timer_pending() function to check whether the timer to be deleted is pending or not, it's unnecessary to check timer pending state again before del_timer() is called. Signed-off-by: Ying Xue <ying.xue@windriver.com> Cc: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2f94aabd9f6c925d77aecb3ff020f1cc12ed8f86	17-Jan-2013	Neil Horman <nhorman@tuxdriver.com>	sctp: refactor sctp_outq_teardown to insure proper re-initalization Jamie Parsons reported a problem recently, in which the re-initalization of an association (The duplicate init case), resulted in a loss of receive window space. He tracked down the root cause to sctp_outq_teardown, which discarded all the data on an outq during a re-initalization of the corresponding association, but never reset the outq->outstanding_data field to zero. I wrote, and he tested this fix, which does a proper full re-initalization of the outq, fixing this problem, and hopefully future proofing us from simmilar issues down the road. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Reported-by: Jamie Parsons <Jamie.Parsons@metaswitch.com> Tested-by: Jamie Parsons <Jamie.Parsons@metaswitch.com> CC: Jamie Parsons <Jamie.Parsons@metaswitch.com> CC: Vlad Yasevich <vyasevich@gmail.com> CC: "David S. Miller" <davem@davemloft.net> CC: netdev@vger.kernel.org Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
196d67593439b03088913227093e374235596e33	01-Dec-2012	Michele Baldessari <michele@acksyn.org>	sctp: Add support to per-association statistics via a new SCTP_GET_ASSOC_STATS call The current SCTP stack is lacking a mechanism to have per association statistics. This is an implementation modeled after OpenSolaris' SCTP_GET_ASSOC_STATS. Userspace part will follow on lksctp if/when there is a general ACK on this. V4: - Move ipackets++ before q->immediate.func() for consistency reasons - Move sctp_max_rto() at the end of sctp_transport_update_rto() to avoid returning bogus RTO values - return asoc->rto_min when max_obs_rto value has not changed V3: - Increase ictrlchunks in sctp_assoc_bh_rcv() as well - Move ipackets++ to sctp_inq_push() - return 0 when no rto updates took place since the last call V2: - Implement partial retrieval of stat struct to cope for future expansion - Kill the rtxpackets counter as it cannot be precise anyway - Rename outseqtsns to outofseqtsns to make it clearer that these are out of sequence unexpected TSNs - Move asoc->ipackets++ under a lock to avoid potential miscounts - Fold asoc->opackets++ into the already existing asoc check - Kill unneeded (q->asoc) test when increasing rtxchunks - Do not count octrlchunks if sending failed (SCTP_XMIT_OK != 0) - Don't count SHUTDOWNs as SACKs - Move SCTP_GET_ASSOC_STATS to the private space API - Adjust the len check in sctp_getsockopt_assoc_stats() to allow for future struct growth - Move association statistics in their own struct - Update idupchunks when we send a SACK with dup TSNs - return min_rto in max_rto when RTO has not changed. Also return the transport when max_rto last changed. Signed-off: Michele Baldessari <michele@acksyn.org> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
edfee0339e681a784ebacec7e8c2dc97dc6d2839	03-Oct-2012	Nicolas Dichtel <nicolas.dichtel@6wind.com>	sctp: check src addr when processing SACK to update transport state Suppose we have an SCTP connection with two paths. After connection is established, path1 is not available, thus this path is marked as inactive. Then traffic goes through path2, but for some reasons packets are delayed (after rto.max). Because packets are delayed, the retransmit mechanism will switch again to path1. At this time, we receive a delayed SACK from path2. When we update the state of the path in sctp_check_transmitted(), we do not take into account the source address of the SACK, hence we update the wrong path. Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
54a27924237eeb9767135a423dea14a0d1b5954f	04-Sep-2012	Wei Yongjun <yongjun_wei@trendmicro.com.cn>	sctp: use list_move_tail instead of list_del/list_add_tail Using list_move_tail() instead of list_del() + list_add_tail(). spatch with a semantic match is used to found this problem. (http://coccinelle.lip6.fr/) Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: David S. Miller <davem@davemloft.net>
b01a24078fa3fc4f0f447d1306ce5adc495ead86	06-Aug-2012	Eric W. Biederman <ebiederm@xmission.com>	sctp: Make the mib per network namespace Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
5aa93bcf66f4af094d6f11096e81d5501a0b4ba5	21-Jul-2012	Neil Horman <nhorman@tuxdriver.com>	sctp: Implement quick failover draft from tsvwg I've seen several attempts recently made to do quick failover of sctp transports by reducing various retransmit timers and counters. While its possible to implement a faster failover on multihomed sctp associations, its not particularly robust, in that it can lead to unneeded retransmits, as well as false connection failures due to intermittent latency on a network. Instead, lets implement the new ietf quick failover draft found here: http://tools.ietf.org/html/draft-nishida-tsvwg-sctp-failover-05 This will let the sctp stack identify transports that have had a small number of errors, and avoid using them quickly until their reliability can be re-established. I've tested this out on two virt guests connected via multiple isolated virt networks and believe its in compliance with the above draft and works well. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> CC: Vlad Yasevich <vyasevich@gmail.com> CC: Sridhar Samudrala <sri@us.ibm.com> CC: "David S. Miller" <davem@davemloft.net> CC: linux-sctp@vger.kernel.org CC: joe@perches.com Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
95c961747284a6b83a5e2d81240e214b0fa3464d	15-Apr-2012	Eric Dumazet <eric.dumazet@gmail.com>	net: cleanup unsigned to unsigned int Use of "unsigned int" is preferred to bare "unsigned" in net tree. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
a76c0adf60f6ca5ff3481992e4ea0383776b24d2	19-Dec-2011	Thomas Graf <tgraf@redhat.com>	sctp: Do not account for sizeof(struct sk_buff) in estimated rwnd When checking whether a DATA chunk fits into the estimated rwnd a full sizeof(struct sk_buff) is added to the needed chunk size. This quickly exhausts the available rwnd space and leads to packets being sent which are much below the PMTU limit. This can lead to much worse performance. The reason for this behaviour was to avoid putting too much memory pressure on the receiver. The concept is not completely irational because a Linux receiver does in fact clone an skb for each DATA chunk delivered. However, Linux also reserves half the available socket buffer space for data structures therefore usage of it is already accounted for. When proposing to change this the last time it was noted that this behaviour was introduced to solve a performance issue caused by rwnd overusage in combination with small DATA chunks. Trying to reproduce this I found that with the sk_buff overhead removed, the performance would improve significantly unless socket buffer limits are increased. The following numbers have been gathered using a patched iperf supporting SCTP over a live 1 Gbit ethernet network. The -l option was used to limit DATA chunk sizes. The numbers listed are based on the average of 3 test runs each. Default values have been used for sk_(r\|w)mem. Chunk Size Unpatched No Overhead ------------------------------------- 4 15.2 Kbit [!] 12.2 Mbit [!] 8 35.8 Kbit [!] 26.0 Mbit [!] 16 95.5 Kbit [!] 54.4 Mbit [!] 32 106.7 Mbit 102.3 Mbit 64 189.2 Mbit 188.3 Mbit 128 331.2 Mbit 334.8 Mbit 256 537.7 Mbit 536.0 Mbit 512 766.9 Mbit 766.6 Mbit 1024 810.1 Mbit 808.6 Mbit Signed-off-by: Thomas Graf <tgraf@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
f207c050fb1c385e34946e57107e639831c7d557	16-Jun-2011	Michio Honda <micchie@sfc.wide.ad.jp>	sctp: HEARTBEAT negotiation after ASCONF This patch fixes BUG that the ASCONF receiver transmits DATA chunks to the newly added UNCONFIRMED destination. Signed-off-by: Michio Honda <micchie@sfc.wide.ad.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
f8d9605243280f1870dd2c6c37a735b925c15f3c	07-Jul-2011	Thomas Graf <tgraf@infradead.org>	sctp: Enforce retransmission limit during shutdown When initiating a graceful shutdown while having data chunks on the retransmission queue with a peer which is in zero window mode the shutdown is never completed because the retransmission error count is reset periodically by the following two rules: - Do not timeout association while doing zero window probe. - Reset overall error count when a heartbeat request has been acknowledged. The graceful shutdown will wait for all outstanding TSN to be acknowledged before sending the SHUTDOWN request. This never happens due to the peer's zero window not acknowledging the continuously retransmitted data chunks. Although the error counter is incremented for each failed retransmission, the receiving of the SACK announcing the zero window clears the error count again immediately. Also heartbeat requests continue to be sent periodically. The peer acknowledges these requests causing the error counter to be reset as well. This patch changes behaviour to only reset the overall error counter for the above rules while not in shutdown. After reaching the maximum number of retransmission attempts, the T5 shutdown guard timer is scheduled to give the receiver some additional time to recover. The timer is stopped as soon as the receiver acknowledges any data. The issue can be easily reproduced by establishing a sctp association over the loopback device, constantly queueing data at the sender while not reading any at the receiver. Wait for the window to reach zero, then initiate a shutdown by killing both processes simultaneously. The association will never be freed and the chunks on the retransmission queue will be retransmitted indefinitely. Signed-off-by: Thomas Graf <tgraf@infradead.org> Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
8a07eb0a50aebc8c95478d49c28c7f8419a26cef	26-Apr-2011	Michio Honda <micchie@sfc.wide.ad.jp>	sctp: Add ASCONF operation on the single-homed host In this case, the SCTP association transmits an ASCONF packet including addition of the new IP address and deletion of the old address. This patch implements this functionality. In this case, the ASCONF chunk is added to the beginning of the queue, because the other chunks cannot be transmitted in this state. Signed-off-by: Michio Honda <micchie@sfc.wide.ad.jp> Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Acked-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
4c6a6f42131dd750dcfe3c71e63bfc046e5a227e	19-Apr-2011	Wei Yongjun <yjwei@cn.fujitsu.com>	sctp: move chunk from retransmit queue to abandoned list If there is still data waiting to retransmit and remain in retransmit queue, while doing the next retransmit, if the chunk is abandoned, we should move it to abandoned list. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
0b8f9e25b0aaf5a5d9fd844a97e5c17746b865d4	19-Apr-2011	Vlad Yasevich <vladislav.yasevich@hp.com>	sctp: remove completely unsed EMPTY state SCTP does not SCTP_STATE_EMPTY and we can never be in that state. Remove useless code. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
f246a7b7c5b9df0ea0f0807a7101995af5e83213	18-Apr-2011	Vlad Yasevich <vladislav.yasevich@hp.com>	sctp: teach CACC algorithm about removed transports When we have have to remove a transport due to ASCONF, we move the data to a new active path. This can trigger CACC algorithm to not mark that data as missing when SACKs arrive. This is because the transport passed to the CACC algorithm is the one this data is sitting on, not the one it was sent on (that one may be gone). So, by sending the original transport (even if it's NULL), we may start marking data as missing. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
25985edcedea6396277003854657b5f3cb31a628	31-Mar-2011	Lucas De Marchi <lucas.demarchi@profusion.mobi>	Fix common misspellings Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
efea2c6b2efc1716b2c0cf257cc428d6cd3ed6e2	04-Mar-2011	Hagen Paul Pfeifer <hagen@jauu.net>	sctp: several declared/set but unused fixes Signed-off-by: Hagen Paul Pfeifer <hagen@jauu.net> Signed-off-by: David S. Miller <davem@davemloft.net>
145ce502e44b57c074c72cfdc855557e19026999	24-Aug-2010	Joe Perches <joe@perches.com>	net/sctp: Use pr_fmt and pr_<level> Change SCTP_DEBUG_PRINTK and SCTP_DEBUG_PRINTK_IPADDR to use do { print } while (0) guards. Add SCTP_DEBUG_PRINTK_CONT to fix errors in log when lines were continued. Add #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt Add a missing newline in "Failed bind hash alloc" Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
3fa21e07e6acefa31f974d57fba2b6920a7ebd1a	18-May-2010	Joe Perches <joe@perches.com>	net: Remove unnecessary returns from void function()s This patch removes from net/ (but not any netfilter files) all the unnecessary return; statements that precede the last closing brace of void functions. It does not remove the returns that are immediately preceded by a label as gcc doesn't like that. Done via: $ grep -rP --include=*.[ch] -l "return;\n}" net/ \| \ xargs perl -i -e 'local $/ ; while (<>) { s/\n[ \t\n]+return;\n}/\n}/g; print; }' Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
bfa0d9843ac5feb9667990706b4524390fee4df9	01-May-2010	Vlad Yasevich <vladislav.yasevich@hp.com>	sctp: Optimize computation of highest new tsn in SACK. Right now, if the highest tsn in the SACK doesn't change, we'll end up scanning the transmitted lists on the transports twice: once for locating the highest _new_ tsn, and once for actually tagging chunks as acked. This is a waste, since we can record the highest _new_ tsn at the same time as tagging chunks. Long ago this was not possible because we would try to mark chunks as missing at the same time as tagging them acked and this approach didn't work. Now that the two steps are separate, we can re-use the old approach. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
ea862c8d1f4a0d193979c7412c3b946f600721ce	01-May-2010	Vlad Yasevich <vladislav.yasevich@hp.com>	sctp: correctly mark missing chunks in fast recovery According to RFC 4960 Section 7.2.4: If an endpoint is in Fast Recovery and a SACK arrives that advances the Cumulative TSN Ack Point, the miss indications are incremented for all TSNs reported missing in the SACK. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
d9efc2231b28bc199f9de4dd594248b7341188e5	01-May-2010	Vlad Yasevich <vladislav.yasevich@hp.com>	sctp: Do not force T3 timer on fast retransmissions. We don't need to force the T3 timer any more and it's actually wrong to do as it causes too long of a delay. The timer will be started if one is not running, but if one is running, we leave it alone. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
ae19c54866450f6c6f79223ca7d37965859a54e1	01-May-2010	Vlad Yasevich <vladislav.yasevich@hp.com>	sctp: remove 'resent' bit from the chunk The 'resent' bit is used to make sure that we don't update rto estimate based on retransmitted chunks. However, we already have the 'rto_pending' bit that we test when need to update rto, so 'resent' bit is just extra. Additionally, we currently have a bug in that we always set a 'resent' bit and thus rto estimate is only updated by Heartbeats. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
ec7b9519509061bbc09a43284c3570aa492e07f0	01-May-2010	Shan Wei <shanwei@cn.fujitsu.com>	sctp: use sctp_chunk_is_data macro to decide a chunk is data chunk sctp_chunk_is_data macro is defined to decide that whether a chunk is data chunk or not. Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com> Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
bc4f841a05364b2572bcc266e9fd7e9cf5f06d5b	01-May-2010	Wei Yongjun <yjwei@cn.fujitsu.com>	sctp: fix to retranmit at least one DATA chunk While doing retranmit, if control chunk exists, such as FORWARD TSN chunk, and the DATA chunk can not be bundled with this control chunk because of PMTU limit, no DATA chunk will be retranmitted in the current implementation. This patch makes sure to retranmit at least one DATA chunk in this case. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>