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2012-12-07sctp: Add RCU protection to assoc->transport_addr_listThomas Graf1-0/+2
peer.transport_addr_list is currently only protected by sk_sock which is inpractical to acquire for procfs dumping purposes. This patch adds RCU protection allowing for the procfs readers to enter RCU read-side critical sections. Modification of the list continues to be serialized via sk_lock. V2: Use list_del_rcu() in sctp_association_free() to be safe Skip transports marked dead when dumping for procfs Cc: Vlad Yasevich <vyasevich@gmail.com> Cc: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Thomas Graf <tgraf@suug.ch> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-12-03sctp: Add support to per-association statistics via a new ↵Michele Baldessari3-0/+75
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>
2012-11-21sctp: send abort chunk when max_retrans exceededNeil Horman1-0/+2
In the event that an association exceeds its max_retrans attempts, we should send an ABORT chunk indicating that we are closing the assocation as a result. Because of the nature of the error, its unlikely to be received, but its a nice clean way to close the association if it does make it through, and it will give anyone watching via tcpdump a clue as to what happened. Change notes: v2) * Removed erroneous changes from sctp_make_violation_parmlen Signed-off-by: Neil Horman <nhorman@tuxdriver.com> CC: Vlad Yasevich <vyasevich@gmail.com> CC: "David S. Miller" <davem@davemloft.net> CC: linux-sctp@vger.kernel.org Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-11-03sctp: Clean up type-punning in sctp_cmd_t unionNeil Horman2-17/+23
Lots of points in the sctp_cmd_interpreter function treat the sctp_cmd_t arg as a void pointer, even though they are written as various other types. Theres no need for this as doing so just leads to possible type-punning issues that could cause crashes, and if we remain type-consistent we can actually just remove the void * member of the union entirely. Change Notes: v2) * Dropped chunk that modified SCTP_NULL to create a marker pattern should anyone try to use a SCTP_NULL() assigned sctp_arg_t, Assigning to .zero provides the same effect and should be faster, per Vlad Y. v3) * Reverted part of V2, opting to use memset instead of .zero, so that the entire union is initalized thus avoiding the i164 speculative load problems previously encountered, per Dave M.. Also rewrote SCTP_[NO]FORCE so as to use common infrastructure a little more Signed-off-by: Neil Horman <nhorman@tuxdriver.com CC: Vlad Yasevich <vyasevich@gmail.com> CC: "David S. Miller" <davem@davemloft.net> CC: linux-sctp@vger.kernel.org Signed-off-by: David S. Miller <davem@davemloft.net>
2012-10-26sctp: Make hmac algorithm selection for cookie generation dynamicNeil Horman2-8/+1
Currently sctp allows for the optional use of md5 of sha1 hmac algorithms to generate cookie values when establishing new connections via two build time config options. Theres no real reason to make this a static selection. We can add a sysctl that allows for the dynamic selection of these algorithms at run time, with the default value determined by the corresponding crypto library availability. This comes in handy when, for example running a system in FIPS mode, where use of md5 is disallowed, but SHA1 is permitted. Note: This new sysctl has no corresponding socket option to select the cookie hmac algorithm. I chose not to implement that intentionally, as RFC 6458 contains no option for this value, and I opted not to pollute the socket option namespace. Change notes: v2) * Updated subject to have the proper sctp prefix as per Dave M. * Replaced deafult selection options with new options that allow developers to explicitly select available hmac algs at build time as per suggestion by Vlad Y. Signed-off-by: Neil Horman <nhorman@tuxdriver.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>
2012-10-04sctp: check src addr when processing SACK to update transport stateNicolas Dichtel1-1/+1
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>
2012-08-15sctp: fix a compile error in sctp.hCong Wang1-2/+2
I got the following compile error: In file included from include/net/sctp/checksum.h:46:0, from net/ipv4/netfilter/nf_nat_proto_sctp.c:14: include/net/sctp/sctp.h: In function ‘sctp_dbg_objcnt_init’: include/net/sctp/sctp.h:370:88: error: parameter name omitted include/net/sctp/sctp.h: In function ‘sctp_dbg_objcnt_exit’: include/net/sctp/sctp.h:371:88: error: parameter name omitted which is caused by commit 13d782f6b4fbbaf9d0380a9947deb45a9de46ae7 Author: Eric W. Biederman <ebiederm@xmission.com> Date: Mon Aug 6 08:45:15 2012 +0000 sctp: Make the proc files per network namespace. This patch could fix it. Cc: David S. Miller <davem@davemloft.net> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-08-15sctp: Make sysctl tunables per netEric W. Biederman1-116/+0
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-08-15sctp: Push struct net down into sctp_verify_ext_paramEric W. Biederman1-3/+3
Add struct net as a parameter to sctp_verify_param so it can be passed to sctp_verify_ext_param where struct net will be needed when the sctp tunables become per net tunables. Add struct net as a parameter to sctp_verify_init so struct net can be passed to sctp_verify_param. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-08-15sctp: Push struct net down into all of the state machine functionsEric W. Biederman1-1/+2
There are a handle of state machine functions primarily those dealing with processing INIT packets where there is neither a valid endpoint nor a valid assoication from which to derive a struct net. Therefore add struct net * to the parameter list of sctp_state_fn_t and update all of the state machine functions. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-08-15sctp: Push struct net down into sctp_in_scopeEric W. Biederman1-1/+1
struct net will be needed shortly when the tunables are made per network namespace. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-08-15sctp: Push struct net down into sctp_transport_initEric W. Biederman1-1/+1
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-08-15sctp: Push struct net down to sctp_chunk_event_lookupEric W. Biederman2-8/+9
This trickles up through sctp_sm_lookup_event up to sctp_do_sm and up further into sctp_primitiv_NAME before the code reaches places where struct net can be reliably found. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-08-15sctp: Add infrastructure for per net sysctlsEric W. Biederman1-0/+4
Start with an empty sctp_net_table that will be populated as the various tunable sysctls are made per net. 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>
2012-08-15sctp: Make the mib per network namespaceEric W. Biederman1-5/+4
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>
2012-08-15sctp: Make the proc files per network namespace.Eric W. Biederman1-13/+12
- Convert all of the files under /proc/net/sctp to be per network namespace. - Don't print anything for /proc/net/sctp/snmp except in the initial network namespaces as the snmp counters still have to be converted to be 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>
2012-08-15sctp: Make the ctl_sock per network namespaceEric W. Biederman1-1/+0
- Kill sctp_get_ctl_sock, it is useless now. - Pass struct net where needed so net->sctp.ctl_sock is accessible. 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>
2012-08-15sctp: Make the address lists per network namespaceEric W. Biederman2-23/+3
- Move the address lists into struct net - Add per network namespace initialization and cleanup - Pass around struct net so it is everywhere I need it. - Rename all of the global variable references into references to the variables moved into struct net 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>
2012-08-15sctp: Make the association hashtable handle multiple network namespacesEric W. Biederman2-4/+5
- Use struct net in the hash calculation - Use sock_net(association.base.sk) in the association lookups. - On receive calculate the network namespace from skb->dev. - Pass struct net from receive down to the functions that actually do the association lookup. 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>
2012-08-15sctp: Make the endpoint hashtable handle multiple network namespacesEric W. Biederman2-3/+3
- Use struct net in the hash calculation - Use sock_net(endpoint.base.sk) in the endpoint lookups. - On receive calculate the network namespace from skb->dev. 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>
2012-08-15sctp: Make the port hash table use struct net in it's key.Eric W. Biederman2-2/+3
- Add struct net into the port hash table hash calculation - Add struct net inot the struct sctp_bind_bucket so there is a memory of which network namespace a port is allocated in. No need for a ref count because sctp_bind_bucket only exists when there are sockets in the hash table and sockets can not change their network namspace, and sockets already ref count their network namespace. - Add struct net into the key comparison when we are testing to see if we have found the port hash table entry we are looking for. With these changes lookups in the port hash table becomes safe to use in multiple network namespaces. 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>
2012-07-22sctp: Implement quick failover draft from tsvwgNeil Horman3-1/+31
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>
2012-07-16sctp: Adjust PMTU updates to accomodate route invalidation.David S. Miller2-4/+4
This adjusts the call to dst_ops->update_pmtu() so that we can transparently handle the fact that, in the future, the dst itself can be invalidated by the PMTU update (when we have non-host routes cached in sockets). Signed-off-by: David S. Miller <davem@davemloft.net>
2012-07-12ipv6: Add redirect support to all protocol icmp error handlers.David S. Miller1-0/+2
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-07-01sctp: be more restrictive in transport selection on bundled sacksNeil Horman2-1/+6
It was noticed recently that when we send data on a transport, its possible that we might bundle a sack that arrived on a different transport. While this isn't a major problem, it does go against the SHOULD requirement in section 6.4 of RFC 2960: An endpoint SHOULD transmit reply chunks (e.g., SACK, HEARTBEAT ACK, etc.) to the same destination transport address from which it received the DATA or control chunk to which it is replying. This rule should also be followed if the endpoint is bundling DATA chunks together with the reply chunk. This patch seeks to correct that. It restricts the bundling of sack operations to only those transports which have moved the ctsn of the association forward since the last sack. By doing this we guarantee that we only bundle outbound saks on a transport that has received a chunk since the last sack. This brings us into stricter compliance with the RFC. Vlad had initially suggested that we strictly allow only sack bundling on the transport that last moved the ctsn forward. While this makes sense, I was concerned that doing so prevented us from bundling in the case where we had received chunks that moved the ctsn on multiple transports. In those cases, the RFC allows us to select any of the transports having received chunks to bundle the sack on. so I've modified the approach to allow for that, by adding a state variable to each transport that tracks weather it has moved the ctsn since the last sack. This I think keeps our behavior (and performance), close enough to our current profile that I think we can do this without a sysctl knob to enable/disable it. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> CC: Vlad Yaseivch <vyasevich@gmail.com> CC: David S. Miller <davem@davemloft.net> CC: linux-sctp@vger.kernel.org Reported-by: Michele Baldessari <michele@redhat.com> Reported-by: sorin serban <sserban@redhat.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-17Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-0/+13
2012-05-11sctp: check cached dst before using itNicolas Dichtel1-0/+13
dst_check() will take care of SA (and obsolete field), hence IPsec rekeying scenario is taken into account. Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Acked-by: Vlad Yaseivch <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-04-15net: cleanup unsigned to unsigned intEric Dumazet1-4/+4
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>
2012-03-09sctp: Export sctp_do_peeloffBenjamin Poirier1-0/+1
lookup sctp_association within sctp_do_peeloff() to enable its use outside of the sctp code with minimal knowledge of the former. Signed-off-by: Benjamin Poirier <bpoirier@suse.de> Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-24Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-0/+4
Conflicts: net/bluetooth/l2cap_core.c Just two overlapping changes, one added an initialization of a local variable, and another change added a new local variable. Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-20module_param: make bool parameters really bool (net & drivers/net)Rusty Russell1-1/+1
module_param(bool) used to counter-intuitively take an int. In fddd5201 (mid-2009) we allowed bool or int/unsigned int using a messy trick. It's time to remove the int/unsigned int option. For this version it'll simply give a warning, but it'll break next kernel version. (Thanks to Joe Perches for suggesting coccinelle for 0/1 -> true/false). Cc: "David S. Miller" <davem@davemloft.net> Cc: netdev@vger.kernel.org Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-20sctp: fix incorrect overflow check on autocloseXi Wang1-0/+4
Commit 8ffd3208 voids the previous patches f6778aab and 810c0719 for limiting the autoclose value. If userspace passes in -1 on 32-bit platform, the overflow check didn't work and autoclose would be set to 0xffffffff. This patch defines a max_autoclose (in seconds) for limiting the value and exposes it through sysctl, with the following intentions. 1) Avoid overflowing autoclose * HZ. 2) Keep the default autoclose bound consistent across 32- and 64-bit platforms (INT_MAX / HZ in this patch). 3) Keep the autoclose value consistent between setsockopt() and getsockopt() calls. Suggested-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: Xi Wang <xi.wang@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-12net: use IS_ENABLED(CONFIG_IPV6)Eric Dumazet2-3/+3
Instead of testing defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-11-09sctp: fasthandoff with ASCONF at mobile-nodeMichio Honda1-0/+1
Fast retransmission after changing the last address with ASCONF negotiation Signed-off-by: Michio Honda <micchie@sfc.wide.ad.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-09-22Merge branch 'master' of github.com:davem330/netDavid S. Miller1-0/+1
Conflicts: MAINTAINERS drivers/net/Kconfig drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c drivers/net/ethernet/broadcom/tg3.c drivers/net/wireless/iwlwifi/iwl-pci.c drivers/net/wireless/iwlwifi/iwl-trans-tx-pcie.c drivers/net/wireless/rt2x00/rt2800usb.c drivers/net/wireless/wl12xx/main.c
2011-09-17sctp: deal with multiple COOKIE_ECHO chunksMax Matveev1-0/+1
Attempt to reduce the number of IP packets emitted in response to single SCTP packet (2e3216cd) introduced a complication - if a packet contains two COOKIE_ECHO chunks and nothing else then SCTP state machine corks the socket while processing first COOKIE_ECHO and then loses the association and forgets to uncork the socket. To deal with the issue add new SCTP command which can be used to set association explictly. Use this new command when processing second COOKIE_ECHO chunk to restore the context for SCTP state machine. Signed-off-by: Max Matveev <makc@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-08-25sctp: Bundle HEAERTBEAT into ASCONF_ACKMichio Honda1-0/+1
With this patch a HEARTBEAT chunk is bundled into the ASCONF-ACK for ADD IP ADDRESS, confirming the new destination as quickly as possible. Signed-off-by: Michio Honda <micchie@sfc.wide.ad.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-27atomic: use <linux/atomic.h>Arun Sharma1-1/+1
This allows us to move duplicated code in <asm/atomic.h> (atomic_inc_not_zero() for now) to <linux/atomic.h> Signed-off-by: Arun Sharma <asharma@fb.com> Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-14Merge branch 'master' of ↵David S. Miller2-1/+2
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: net/bluetooth/l2cap_core.c
2011-07-08sctp: ABORT if receive, reassmbly, or reodering queue is not empty while ↵Thomas Graf1-1/+1
closing socket Trigger user ABORT if application closes a socket which has data queued on the socket receive queue or chunks waiting on the reassembly or ordering queue as this would imply data being lost which defeats the point of a graceful shutdown. This behavior is already practiced in TCP. We do not check the input queue because that would mean to parse all chunks on it to look for unacknowledged data which seems too much of an effort. Control chunks or duplicated chunks may also be in the input queue and should not be stopping a graceful shutdown. 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>
2011-07-08sctp: Enforce retransmission limit during shutdownThomas Graf1-0/+1
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>
2011-06-06include/net: Remove unnecessary semicolonsJoe Perches1-2/+2
Semicolons are not necessary after switch/while/for/if braces so remove them. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-02sctp: Add ASCONF operation on the single-homed hostMichio Honda1-0/+2
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>
2011-06-02sctp: Add socket option operation for Auto-ASCONF.Michio Honda1-0/+1
This patch allows the application to operate Auto-ASCONF on/off behavior via setsockopt() and getsockopt(). 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>
2011-06-02sctp: Add Auto-ASCONF support (core).Michio Honda2-0/+17
SCTP reconfigure the IP addresses in the association by using ASCONF chunks as mentioned in RFC5061. For example, we can start to use the newly configured IP address in the existing association. This patch implements automatic ASCONF operation in the SCTP stack with address events in the host computer, which is called auto_asconf. 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>
2011-06-02sctp: Allow regular C expression in 4th argument for ↵YOSHIFUJI Hideaki1-4/+5
SCTP_DEBUG_PRINTK_IPADDR macro. 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>
2011-06-01sctp: stop pending timers and purge queues when peer restart asocWei Yongjun2-1/+2
If the peer restart the asoc, we should not only fail any unsent/unacked data, but also stop the T3-rtx, SACK, T4-rto timers, and teardown ASCONF queues. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-21Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6Linus Torvalds7-29/+54
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1446 commits) macvlan: fix panic if lowerdev in a bond tg3: Add braces around 5906 workaround. tg3: Fix NETIF_F_LOOPBACK error macvlan: remove one synchronize_rcu() call networking: NET_CLS_ROUTE4 depends on INET irda: Fix error propagation in ircomm_lmp_connect_response() irda: Kill set but unused variable 'bytes' in irlan_check_command_param() irda: Kill set but unused variable 'clen' in ircomm_connect_indication() rxrpc: Fix set but unused variable 'usage' in rxrpc_get_transport() be2net: Kill set but unused variable 'req' in lancer_fw_download() irda: Kill set but unused vars 'saddr' and 'daddr' in irlan_provider_connect_indication() atl1c: atl1c_resume() is only used when CONFIG_PM_SLEEP is defined. rxrpc: Fix set but unused variable 'usage' in rxrpc_get_peer(). rxrpc: Kill set but unused variable 'local' in rxrpc_UDP_error_handler() rxrpc: Kill set but unused variable 'sp' in rxrpc_process_connection() rxrpc: Kill set but unused variable 'sp' in rxrpc_rotate_tx_window() pkt_sched: Kill set but unused variable 'protocol' in tc_classify() isdn: capi: Use pr_debug() instead of ifdefs. tg3: Update version to 3.119 tg3: Apply rx_discards fix to 5719/5720 ... Fix up trivial conflicts in arch/x86/Kconfig and net/mac80211/agg-tx.c as per Davem.
2011-05-09sctp: Store a flowi in transports to provide persistent keying.David S. Miller1-0/+1
Several future simplifications are possible now because of this. For example, the sctp_addr unions can simply refer directly to the flowi information. Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-08net,rcu: convert call_rcu(sctp_local_addr_free) to kfree_rcu()Lai Jiangshan1-1/+0
The rcu callback sctp_local_addr_free() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(sctp_local_addr_free). Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>