- 16 Apr, 2016 2 commits
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Hannes Frederic Sowa authored
Due to the fact that the udp socket is destructed asynchronously in a work queue, we have some nondeterministic behavior during shutdown of vxlan tunnels and creating new ones. Fix this by keeping the destruction process synchronous in regards to the user space process so IFF_UP can be reliably set. udp_tunnel_sock_release destroys vs->sock->sk if reference counter indicates so. We expect to have the same lifetime of vxlan_sock and vxlan_sock->sock->sk even in fast paths with only rcu locks held. So only destruct the whole socket after we can be sure it cannot be found by searching vxlan_net->sock_list. Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Jiri Benc <jbenc@redhat.com> Cc: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by:
Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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wangweidong authored
When tested the PHY SGMII Loopback: 1.set the LOOPBACK bit, 2.set the autoneg to AUTONEG_DISABLE, it calls the genphy_setup_forced which will clear the bit. The BMCR_LOOPBACK bit should be preserved. As Florian pointed out that other bits should be preserved too. So I make the BMCR_ISOLATE and BMCR_PDOWN as well. Signed-off-by:
Weidong Wang <wangweidong1@huawei.com> Signed-off-by:
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- 15 Apr, 2016 38 commits
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David S. Miller authored
Xin Long says: ==================== sctp: support sctp_diag in kernel This patchset will add sctp_diag module to implement diag interface on sctp in kernel. For a listening sctp endpoint, we will just dump it's ep info. For a sctp connection, we will the assoc info and it's ep info. The ss dump will looks like: [iproute2]# ./misc/ss --sctp -n -l State Recv-Q Send-Q Local Address:Port Peer Address:Port LISTEN 0 128 172.16.254.254:8888 *:* LISTEN 0 5 127.0.0.1:1234 *:* LISTEN 0 5 127.0.0.1:1234 *:* - ESTAB 0 0 127.0.0.1%lo:1234 127.0.0.1:4321 LISTEN 0 128 172.16.254.254:8888 *:* - ESTAB 0 0 172.16.254.254%eth1:8888 172.16.253.253:8888 - ESTAB 0 0 172.16.254.254%eth1:8888 172.16.1.1:8888 - ESTAB 0 0 172.16.254.254%eth1:8888 172.16.1.2:8888 - ESTAB 0 0 172.16.254.254%eth1:8888 172.16.2.1:8888 - ESTAB 0 0 172.16.254.254%eth1:8888 172.16.2.2:8888 - ESTAB 0 0 172.16.254.254%eth1:8888 172.16.3.1:8888 - ESTAB 0 0 172.16.254.254%eth1:8888 172.16.3.2:8888 LISTEN 0 0 127.0.0.1:4321 *:* - ESTAB 0 0 127.0.0.1%lo:4321 127.0.0.1:1234 The entries with '- ESTAB' are the assocs, some of them may belong to the same endpoint. So we will dump the parent endpoint first, like the entry with 'LISTEN'. then dump the assocs. ep and assocs entries will be dumped in right order so that ss can show them in tree format easily. Besides, this patchset also simplifies sctp proc codes, cause it has some similar codes with sctp diag in sctp transport traversal. v1->v2: 1. inet_diag_get_handler needs to return it as const. 2. merge 5/7 into 2/7 of v1. v2->v3: do some improvements and fixes in patch 1-4, see the details in each patch's comment. ==================== Signed-off-by: -
Xin Long authored
When rhashtable_walk_init return err, no release function should be called, and when rhashtable_walk_start return err, we should only invoke rhashtable_walk_exit to release the source. But now when sctp_transport_walk_start return err, we just call rhashtable_walk_stop/exit, and never care about if rhashtable_walk_init or start return err, which is so bad. We will fix it by calling rhashtable_walk_exit if rhashtable_walk_start return err in sctp_transport_walk_start, and if sctp_transport_walk_start return err, we do not need to call sctp_transport_walk_stop any more. For sctp proc, we will use 'iter->start_fail' to decide if we will call rhashtable_walk_stop/exit. Signed-off-by:
Xin Long <lucien.xin@gmail.com> Signed-off-by:
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Xin Long authored
In sctp proc, these three functions in remaddrs and assocs are the same. we should merge them into one. Signed-off-by:
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Xin Long authored
This one will implement all the interface of inet_diag, inet_diag_handler. which includes sctp_diag_dump, sctp_diag_dump_one and sctp_diag_get_info. It will work as a module, and register inet_diag_handler when loading. v2->v3: - fix the mistake in inet_assoc_attr_size(). - change inet_diag_msg_laddrs_fill() name to inet_diag_msg_sctpladdrs_fill. - change inet_diag_msg_paddrs_fill() name to inet_diag_msg_sctpaddrs_fill. - add inet_diag_msg_sctpinfo_fill() to make asoc/ep fill code clearer. - add inet_diag_msg_sctpasoc_fill() to make asoc fill code clearer. - merge inet_asoc_diag_fill() and inet_ep_diag_fill() to inet_sctp_diag_fill(). - call sctp_diag_get_info() directly, instead by handler, cause the caller is in the same file with it. - call lock_sock in sctp_tsp_dump_one() to make sure we call get sctp info safely. - after lock_sock(sk), we should check sk != assoc->base.sk. - change mem[SK_MEMINFO_WMEM_ALLOC] to asoc->sndbuf_used for asoc dump when asoc->ep->sndbuf_policy is set. don't use INET_DIAG_MEMINFO attr any more. Signed-off-by:
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Xin Long authored
inet_diag_msg_common_fill is used to fill the diag msg common info, we need to use it in sctp_diag as well, so export it. inet_diag_msg_attrs_fill is used to fill some common attrs info between sctp diag and tcp diag. v2->v3: - do not need to define and export inet_diag_get_handler any more. cause all the functions in it are in sctp_diag.ko, we just call them in sctp_diag.ko. - add inet_diag_msg_attrs_fill to make codes clear. Signed-off-by:
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Xin Long authored
For some main variables in sctp.ko, we couldn't export it to other modules, so we have to define some api to access them. It will include sctp transport and endpoint's traversal. There are some transport traversal functions for sctp_diag, we can also use it for sctp_proc. cause they have the similar situation to traversal transport. v2->v3: - rhashtable_walk_init need the parameter gfp, because of recent upstrem update Signed-off-by:
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Xin Long authored
sctp_diag will dump some important details of sctp's assoc or ep, we use sctp_info to describe them, sctp_get_sctp_info to get them, and export it to sctp_diag.ko. v2->v3: - we will not use list_for_each_safe in sctp_get_sctp_info, cause all the callers of it will use lock_sock. - fix the holes in struct sctp_info with __reserved* field. because sctp_diag is a new feature, and sctp_info is just for now, it may be changed in the future. Signed-off-by:
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Marcelo Ricardo Leitner authored
SCTP already serializes access to rcvbuf through its sock lock: sctp_recvmsg takes it right in the start and release at the end, while rx path will also take the lock before doing any socket processing. On sctp_rcv() it will check if there is an user using the socket and, if there is, it will queue incoming packets to the backlog. The backlog processing will do the same. Even timers will do such check and re-schedule if an user is using the socket. Simplifying this will allow us to remove sctp_skb_list_tail and get ride of some expensive lockings. The lists that it is used on are also mangled with functions like __skb_queue_tail and __skb_unlink in the same context, like on sctp_ulpq_tail_event() and sctp_clear_pd(). sctp_close() will also purge those while using only the sock lock. Therefore the lockings performed by sctp_skb_list_tail() are not necessary. This patch removes this function and replaces its calls with just skb_queue_splice_tail_init() instead. The biggest gain is at sctp_ulpq_tail_event(), because the events always contain a list, even if it's queueing a single skb and this was triggering expensive calls to spin_lock_irqsave/_irqrestore for every data chunk received. As SCTP will deliver each data chunk on a corresponding recvmsg, the more effective the change will be. Before this patch, with chunks with 30 bytes: netperf -t SCTP_STREAM -H 192.168.1.2 -cC -l 60 -- -m 30 -S 400000 400000 -s 400000 400000 on a 10Gbit link with 1500 MTU: SCTP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.1.1 () port 0 AF_INET Recv Send Send Utilization Service Demand Socket Socket Message Elapsed Send Recv Send Recv Size Size Size Time Throughput local remote local remote bytes bytes bytes secs. 10^6bits/s % S % S us/KB us/KB 425984 425984 30 60.00 137.45 7.34 7.36 52.504 52.608 With it: SCTP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.1.1 () port 0 AF_INET Recv Send Send Utilization Service Demand Socket Socket Message Elapsed Send Recv Send Recv Size Size Size Time Throughput local remote local remote bytes bytes bytes secs. 10^6bits/s % S % S us/KB us/KB 425984 425984 30 60.00 179.10 7.97 6.70 43.740 36.788 Signed-off-by:
Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by:
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David S. Miller authored
Saeed Mahameed says: ==================== mlx5_core: mlx5_ifc updates This series include mlx5_core updates for both net-next and rdma trees for 4.7 kernel cycle. This is the only shared code planned for 4.7 between rdma and net trees. Hopefully, this will prevent future conflicts when merging between ib-next and net-next once 4.7 cycle is over and merge window is opened. Both Mellanox rdma and net submissions will proceed once this series is applied into both trees. Future shared code will be sent to both maintainers as pull requests from Mellanox's kernel.org tree. We have included all the maintainers of respective drivers. Kindly review the change and let us know in case of any review comments. ==================== Signed-off-by: -
Saeed Mahameed authored
Adding the needed mlx5_ifc hardware bits and structs for the following feature: * Add vport to steering commands for SRIOV ACL support * Add mlcr, pcmr and mcia registers for dump module EEPROM * Add support for FCS, baeacon led and disable_link bits to hca caps * Add CQE period mode bit in CQ context for CQE based CQ moderation support * Add umr SQ bit for fragmented memory registration * Add needed bits and caps for Striding RQ support Signed-off-by:
Saeed Mahameed <saeedm@mellanox.com> Signed-off-by:
Matan Barak <matanb@mellanox.com> Signed-off-by:
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Tariq Toukan authored
All reserved fields after early_vf_enable are off by 1, since early_vf_enable was not explicitly declared as array of size 1. Reserved field before cqe_zip had a wrong size, it should be 0x80 + 0x3f. Fixes: b0844444 ("net/mlx5_core: Introduce access function to read internal timer ") Fixes: b4ff3a36 ("net/mlx5: Use offset based reserved field names in the IFC header file") Signed-off-by:
Tariq Toukan <tariqt@mellanox.com> Signed-off-by:
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David S. Miller authored
Manish Chopra says: ==================== qed/qede: Add tunneling support This patch series adds support for VXLAN, GRE and GENEVE tunnels to be used over this driver. With this support, adapter can perform TSO offload, inner/outer checksums offloads on TX and RX for encapsulated packets. V1->V2 [ Comments from Jesse Gross incorporated ] * Drop general infrastructure change patch. "net: Make vxlan/geneve default udp ports public" * Remove by default Linux default UDP ports configurations in driver. Instead, use general registration APIs for UDP port configurations * Removing .ndo_features_check - we will add it later with proper change. Please consider applying this series to net-next. ==================== Signed-off-by: -
Manish Chopra authored
This patch enables netdev tunneling features and adds TX/RX fastpath support for tunneling in driver. Signed-off-by:
Manish Chopra <manish.chopra@qlogic.com> Signed-off-by:
Yuval Mintz <Yuval.Mintz@qlogic.com> Signed-off-by:
Ariel Elior <Ariel.Elior@qlogic.com> Signed-off-by:
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Manish Chopra authored
Signed-off-by:
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Manish Chopra authored
This patch enables GENEVE tunnel on the adapter and add support for driver hooks to configure UDP ports for GENEVE tunnel offload to be performed by the adapter. Signed-off-by:
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Manish Chopra authored
This patch enables VXLAN tunnel on the adapter and add support for driver hooks to configure UDP ports for VXLAN tunnel offload to be performed by the adapter. Signed-off-by:
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Manish Chopra authored
This patch adds various structure/APIs needed to configure/enable different tunnel [VXLAN/GRE/GENEVE] parameters on the adapter. Signed-off-by:
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Peter Heise authored
This patch adds support for the newer version 1 of the HSR networking standard. Version 0 is still default and the new version has to be selected via iproute2. Main changes are in the supervision frame handling and its ethertype field. Signed-off-by:
Peter Heise <peter.heise@airbus.com> Signed-off-by:
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David S. Miller authored
Eric Dumazet says: ==================== tcp: final work on SYNFLOOD behavior In the first patch, I remove the costly association of SYNACK+COOKIES to a listener. I believe other parts of the stack should be ready. The second patch removes a useless write into listener socket in tcp_rcv_state_process(), incurring false sharing in tcp_conn_request() Performance under SYNFLOOD goes from 3.2 Mpps to 6 Mpps. Test was using a single TCP listener, on a host with 8 RX queues on the NIC, and 24 cores (48 ht) ==================== Signed-off-by: -
Eric Dumazet authored
Last known hot point during SYNFLOOD attack is the clearing of rx_opt.saw_tstamp in tcp_rcv_state_process() It is not needed for a listener, so we move it where it matters. Performance while a SYNFLOOD hits a single listener socket went from 5 Mpps to 6 Mpps on my test server (24 cores, 8 NIC RX queues) Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
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Eric Dumazet authored
When removing sk_refcnt manipulation on synflood, I missed that using skb_set_owner_w() was racy, if sk->sk_wmem_alloc had already transitioned to 0. We should hold sk_refcnt instead, but this is a big deal under attack. (Doing so increase performance from 3.2 Mpps to 3.8 Mpps only) In this patch, I chose to not attach a socket to syncookies skb. Performance is now 5 Mpps instead of 3.2 Mpps. Following patch will remove last known false sharing in tcp_rcv_state_process() Fixes: 3b24d854 ("tcp/dccp: do not touch listener sk_refcnt under synflood") Signed-off-by:
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Amitoj Kaur Chawla authored
Replace deprecated create_singlethread_workqueue with alloc_ordered_workqueue. Work items include getting tx/rx frame sizes, resetting MPI processor, setting asic recovery bit so ordering seems necessary as only one work item should be in queue/executing at any given time, hence the use of alloc_ordered_workqueue. WQ_MEM_RECLAIM flag has been set since ethernet devices seem to sit in memory reclaim path, so to guarantee forward progress regardless of memory pressure. Signed-off-by:
Amitoj Kaur Chawla <amitoj1606@gmail.com> Acked-by:
Tejun Heo <tj@kernel.org> Signed-off-by:
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David S. Miller authored
Jon Maloy says: ==================== tipc: improvements to the link setup algorithm This series addresses some smaller issues regarding the link setup algorithm. The first commit fixes a rare bug we have discovered during testing; the second one may have some future impact on cluster scalabilty, while remaining ones can be regarded as cosmetic in a wider sense of the word. ==================== Signed-off-by: -
Jon Paul Maloy authored
According to the link FSM, a received traffic packet can take a link from state ESTABLISHING to ESTABLISHED, but the link can still not be fully set up in one atomic operation. This means that even if the the very first packet on the link is a traffic packet with sequence number 1 (one), it has to be dropped and retransmitted. This can be avoided if we let the mentioned packet be preceded by a LINK_PROTOCOL/STATE message, which takes up the endpoint before the arrival of the traffic. We add this small feature in this commit. This is a fully compatible change. Acked-by:
Ying Xue <ying.xue@windriver.com> Signed-off-by:
Jon Maloy <jon.maloy@ericsson.com> Signed-off-by:
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Jon Paul Maloy authored
In some link establishment scenarios we see that packet #2 may be sent out before packet #1, forcing the receiver to demand retransmission of the missing packet. This is harmless, but may cause confusion among people tracing the packet flow. Since this is extremely easy to fix, we do so by adding en extra send call to the bearer immediately after the link has come up. Acked-by:
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Jon Paul Maloy authored
The function tipc_link_timeout() is unnecessary complex, and can easily be made more readable. We do that with this commit. The only functional change is that we remove a redundant test for whether the broadcast link is up or not. Acked-by:
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Jon Paul Maloy authored
When a link is down, it will continuously try to re-establish contact with the peer by sending out a RESET or an ACTIVATE message at each timeout interval. The default value for this interval is currently 375 ms. This is wasteful, and may become a problem in very large clusters with dozens or hundreds of nodes being down simultaneously. We now introduce a simple backoff algorithm for these cases. The first five messages are sent at default rate; thereafter a message is sent only each 16th timer interval. This will cover the vast majority of link recycling cases, since the endpoint starting last will transmit at the higher speed, and the link should normally be established well be before the rate needs to be reduced. The only case where we will see a degradation of link re-establishment times is when the endpoints remain intact, and a glitch in the transmission media is causing the link reset. We will then experience a worst-case re-establishing time of 6 seconds, something we deem acceptable. Acked-by:
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Jon Paul Maloy authored
When a link endpoint is going down locally, e.g., because its interface is being stopped, it will spontaneously send out a RESET message to its peer, informing it about this fact. This saves the peer from detecting the failure via probing, and hence gives both speedier and less resource consuming failure detection on the peer side. According to the link FSM, a receiver of a RESET message, ignoring the reason for it, must now consider the sender ready to come back up, and starts periodically sending out ACTIVATE messages to the peer in order to re-establish the link. Also, according to the FSM, the receiver of an ACTIVATE message can now go directly to state ESTABLISHED and start sending regular traffic packets. This is a well-proven and robust FSM. However, in the case of a reboot, there is a small possibilty that link endpoint on the rebooted node may have been re-created with a new bearer identity between the moment it sent its (pre-boot) RESET and the moment it receives the ACTIVATE from the peer. The new bearer identity cannot be known by the peer according to this scenario, since traffic headers don't convey such information. This is a problem, because both endpoints need to know the correct value of the peer's bearer id at any moment in time in order to be able to produce correct link events for their users. The only way to guarantee this is to enforce a full setup message exchange (RESET + ACTIVATE) even after the reboot, since those messages carry the bearer idientity in their header. In this commit we do this by introducing and setting a "stopping" bit in the header of the spontaneously generated RESET messages, informing the peer that the sender will not be immediately ready to re-establish the link. A receiver seeing this bit must act as if this were a locally detected connectivity failure, and hence has to go through a full two- way setup message exchange before any link can be re-established. Although never reported, this problem seems to have always been around. This protocol addition is fully backwards compatible. Acked-by:
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David S. Miller authored
Jiri Pirko says: ==================== mlxsw: spectrum_buffers: couple of cosmetic patches As suggested by David Laight ==================== Signed-off-by: -
Jiri Pirko authored
Suggested-by:
David Laight <David.Laight@ACULAB.COM> Signed-off-by:
Jiri Pirko <jiri@mellanox.com> Signed-off-by:
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Jiri Pirko authored
Suggested-by:
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Jiri Pirko authored
Reported-by:
kbuild test robot <fengguang.wu@intel.com> Fixes: bf797471 ("devlink: add shared buffer configuration") Signed-off-by:
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Paolo Abeni authored
Currently the tun device accounting uses dev->stats without applying any kind of protection, regardless that accounting happens in preemptible process context. This patch move the tun stats to a per cpu data structure, and protect the updates with u64_stats_update_begin()/u64_stats_update_end() or this_cpu_inc according to the stat type. The per cpu stats are aggregated by the newly added ndo_get_stats64 ops. Signed-off-by:
Paolo Abeni <pabeni@redhat.com> Signed-off-by:
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David S. Miller authored
Merge branch 'bpf-ARG_PTR_TO_RAW_STACK' Daniel Borkmann says: ==================== BPF updates This series adds a new verifier argument type called ARG_PTR_TO_RAW_STACK and converts related helpers to make use of it. Basic idea is that we can save init of stack memory when the helper function is guaranteed to fully fill out the passed buffer in every path. Series also adds test cases and converts samples. For more details, please see individual patches. ==================== Signed-off-by: -
Daniel Borkmann authored
This adds test cases mostly around ARG_PTR_TO_RAW_STACK to check the verifier behaviour. [...] #84 raw_stack: no skb_load_bytes OK #85 raw_stack: skb_load_bytes, no init OK #86 raw_stack: skb_load_bytes, init OK #87 raw_stack: skb_load_bytes, spilled regs around bounds OK #88 raw_stack: skb_load_bytes, spilled regs corruption OK #89 raw_stack: skb_load_bytes, spilled regs corruption 2 OK #90 raw_stack: skb_load_bytes, spilled regs + data OK #91 raw_stack: skb_load_bytes, invalid access 1 OK #92 raw_stack: skb_load_bytes, invalid access 2 OK #93 raw_stack: skb_load_bytes, invalid access 3 OK #94 raw_stack: skb_load_bytes, invalid access 4 OK #95 raw_stack: skb_load_bytes, invalid access 5 OK #96 raw_stack: skb_load_bytes, invalid access 6 OK #97 raw_stack: skb_load_bytes, large access OK Summary: 98 PASSED, 0 FAILED Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Acked-by:
Alexei Starovoitov <ast@kernel.org> Signed-off-by:
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Daniel Borkmann authored
Remove the zero initialization in the sample programs where appropriate. Note that this is an optimization which is now possible, old programs still doing the zero initialization are just fine as well. Also, make sure we don't have padding issues when we don't memset() the entire struct anymore. Signed-off-by:
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Daniel Borkmann authored
This patch converts all helpers that can use ARG_PTR_TO_RAW_STACK as argument type. For tc programs this is bpf_skb_load_bytes(), bpf_skb_get_tunnel_key(), bpf_skb_get_tunnel_opt(). For tracing, this optimizes bpf_get_current_comm() and bpf_probe_read(). The check in bpf_skb_load_bytes() for MAX_BPF_STACK can also be removed since the verifier already makes sure we stay within bounds on stack buffers. Signed-off-by:
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Daniel Borkmann authored
When passing buffers from eBPF stack space into a helper function, we have ARG_PTR_TO_STACK argument type for helpers available. The verifier makes sure that such buffers are initialized, within boundaries, etc. However, the downside with this is that we have a couple of helper functions such as bpf_skb_load_bytes() that fill out the passed buffer in the expected success case anyway, so zero initializing them prior to the helper call is unneeded/wasted instructions in the eBPF program that can be avoided. Therefore, add a new helper function argument type called ARG_PTR_TO_RAW_STACK. The idea is to skip the STACK_MISC check in check_stack_boundary() and color the related stack slots as STACK_MISC after we checked all call arguments. Helper functions using ARG_PTR_TO_RAW_STACK must make sure that every path of the helper function will fill the provided buffer area, so that we cannot leak any uninitialized stack memory. This f.e. means that error paths need to memset() the buffers, but the expected fast-path doesn't have to do this anymore. Since there's no such helper needing more than at most one ARG_PTR_TO_RAW_STACK argument, we can keep it simple and don't need to check for multiple areas. Should in future such a use-case really appear, we have check_raw_mode() that will make sure we implement support for it first. Signed-off-by:
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