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2020-07-04net: use mptcp setsockopt function for SOL_SOCKET on mptcp socketsFlorian Westphal2-1/+15
setsockopt(mptcp_fd, SOL_SOCKET, ...)... appears to work (returns 0), but it has no effect -- this is because the MPTCP layer never has a chance to copy the settings to the subflow socket. Skip the generic handling for the mptcp case and instead call the mptcp specific handler instead for SOL_SOCKET too. Next patch adds more specific handling for SOL_SOCKET to mptcp. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextDavid S. Miller8-69/+584
Daniel Borkmann says: ==================== pull-request: bpf-next 2020-07-04 The following pull-request contains BPF updates for your *net-next* tree. We've added 73 non-merge commits during the last 17 day(s) which contain a total of 106 files changed, 5233 insertions(+), 1283 deletions(-). The main changes are: 1) bpftool ability to show PIDs of processes having open file descriptors for BPF map/program/link/BTF objects, relying on BPF iterator progs to extract this info efficiently, from Andrii Nakryiko. 2) Addition of BPF iterator progs for dumping TCP and UDP sockets to seq_files, from Yonghong Song. 3) Support access to BPF map fields in struct bpf_map from programs through BTF struct access, from Andrey Ignatov. 4) Add a bpf_get_task_stack() helper to be able to dump /proc/*/stack via seq_file from BPF iterator progs, from Song Liu. 5) Make SO_KEEPALIVE and related options available to bpf_setsockopt() helper, from Dmitry Yakunin. 6) Optimize BPF sk_storage selection of its caching index, from Martin KaFai Lau. 7) Removal of redundant synchronize_rcu()s from BPF map destruction which has been a historic leftover, from Alexei Starovoitov. 8) Several improvements to test_progs to make it easier to create a shell loop that invokes each test individually which is useful for some CIs, from Jesper Dangaard Brouer. 9) Fix bpftool prog dump segfault when compiled without skeleton code on older clang versions, from John Fastabend. 10) Bunch of cleanups and minor improvements, from various others. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-03ipv6/ping: set skb->mark on icmpv6 socketsWillem de Bruijn1-0/+1
IPv6 ping sockets route based on fwmark, but do not yet set skb->mark. Add this. IPv4 ping sockets also do both. Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-02bridge: Extend br_fill_ifinfo to return MPR statusHoratiu Vultur1-1/+24
This patch extends the function br_fill_ifinfo to return also the MRP status for each instance on a bridge. It also adds a new filter RTEXT_FILTER_MRP to return the MRP status only when this is set, not to interfer with the vlans. The MRP status is return only on the bridge interfaces. Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com> Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-02bridge: mrp: Add br_mrp_fill_infoHoratiu Vultur2-0/+71
Add the function br_mrp_fill_info which populates the MRP attributes regarding the status of each MRP instance. Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com> Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-01mptcp: add receive buffer auto-tuningFlorian Westphal3-8/+127
When mptcp is used, userspace doesn't read from the tcp (subflow) socket but from the parent (mptcp) socket receive queue. skbs are moved from the subflow socket to the mptcp rx queue either from 'data_ready' callback (if mptcp socket can be locked), a work queue, or the socket receive function. This means tcp_rcv_space_adjust() is never called and thus no receive buffer size auto-tuning is done. An earlier (not merged) patch added tcp_rcv_space_adjust() calls to the function that moves skbs from subflow to mptcp socket. While this enabled autotuning, it also meant tuning was done even if userspace was reading the mptcp socket very slowly. This adds mptcp_rcv_space_adjust() and calls it after userspace has read data from the mptcp socket rx queue. Its very similar to tcp_rcv_space_adjust, with two differences: 1. The rtt estimate is the largest one observed on a subflow 2. The rcvbuf size and window clamp of all subflows is adjusted to the mptcp-level rcvbuf. Otherwise, we get spurious drops at tcp (subflow) socket level if the skbs are not moved to the mptcp socket fast enough. Before: time mptcp_connect.sh -t -f $((4*1024*1024)) -d 300 -l 0.01% -r 0 -e "" -m mmap [..] ns4 MPTCP -> ns3 (10.0.3.2:10108 ) MPTCP (duration 40823ms) [ OK ] ns4 MPTCP -> ns3 (10.0.3.2:10109 ) TCP (duration 23119ms) [ OK ] ns4 TCP -> ns3 (10.0.3.2:10110 ) MPTCP (duration 5421ms) [ OK ] ns4 MPTCP -> ns3 (dead:beef:3::2:10111) MPTCP (duration 41446ms) [ OK ] ns4 MPTCP -> ns3 (dead:beef:3::2:10112) TCP (duration 23427ms) [ OK ] ns4 TCP -> ns3 (dead:beef:3::2:10113) MPTCP (duration 5426ms) [ OK ] Time: 1396 seconds After: ns4 MPTCP -> ns3 (10.0.3.2:10108 ) MPTCP (duration 5417ms) [ OK ] ns4 MPTCP -> ns3 (10.0.3.2:10109 ) TCP (duration 5427ms) [ OK ] ns4 TCP -> ns3 (10.0.3.2:10110 ) MPTCP (duration 5422ms) [ OK ] ns4 MPTCP -> ns3 (dead:beef:3::2:10111) MPTCP (duration 5415ms) [ OK ] ns4 MPTCP -> ns3 (dead:beef:3::2:10112) TCP (duration 5422ms) [ OK ] ns4 TCP -> ns3 (dead:beef:3::2:10113) MPTCP (duration 5423ms) [ OK ] Time: 296 seconds Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-01net: sched: Allow changing default qdisc to FQ-PIEDanny Lin1-0/+4
Similar to fq_codel and the other qdiscs that can set as default, fq_pie is also suitable for general use without explicit configuration, which makes it a valid choice for this. This is useful in situations where a painless out-of-the-box solution for reducing bufferbloat is desired but fq_codel is not necessarily the best choice. For example, fq_pie can be better for DASH streaming, but there could be more cases where it's the better choice of the two simple AQMs available in the kernel. Signed-off-by: Danny Lin <danny@kdrag0n.dev> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-01net/packet: remove redundant initialization of variable errColin Ian King1-1/+1
The variable err is being initialized with a value that is never read and it is being updated later with a new value. The initialization is redundant and can be removed. Addresses-Coverity: ("Unused value") Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-01bpf: Fix net/core/filter build errors when INET is not enabledRandy Dunlap1-0/+4
Fix build errors when CONFIG_INET is not set/enabled. (.text+0x2b1b): undefined reference to `tcp_prot' (.text+0x2b3b): undefined reference to `tcp_prot' Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/b1a858ec-7e04-56bc-248a-62cb9bbee726@infradead.org
2020-06-30net: devres: rename the release callback of devm_register_netdev()Bartosz Golaszewski1-2/+2
Make it an explicit counterpart to devm_register_netdev() just like we do with devm_free_netdev() for better clarity. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-30tcp: call tcp_ack_tstamp() when not fully ackedYousuk Seung1-2/+5
When skb is coalesced tcp_ack_tstamp() still needs to be called when not fully acked in tcp_clean_rtx_queue(), otherwise SCM_TSTAMP_ACK timestamps may never be fired. Since the original patch series had dependent commits, this patch fixes the issue instead of reverting by restoring calls to tcp_ack_tstamp() when skb is not fully acked. Fixes: fdb7eb21ddd3 ("tcp: stamp SCM_TSTAMP_ACK later in tcp_clean_rtx_queue()") Signed-off-by: Yousuk Seung <ysseung@google.com> Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-30mptcp: do nonce initialization at subflow creation timePaolo Abeni1-34/+20
This clean-up the code a bit, reduces the number of used hooks and indirect call requested, and allow better error reporting from __mptcp_subflow_connect() Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-30Merge tag 'batadv-next-for-davem-20200630' of ↵David S. Miller21-96/+123
git://git.open-mesh.org/linux-merge Simon Wunderlich says: ==================== This feature/cleanup patchset includes the following patches: - bump version strings, by Simon Wunderlich - update mailing list URL, by Sven Eckelmann - fix typos and grammar in documentation, by Sven Eckelmann - introduce a configurable per interface hop penalty, by Linus Luessing ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-30net: dsa: Improve subordinate PHY error messageFlorian Fainelli1-1/+2
It is not very informative to know the DSA master device when a subordinate network device fails to get its PHY setup. Provide the device name and capitalize PHY while we are it. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-29ethtool: Add link extended stateAmit Cohen1-4/+48
Currently, drivers can only tell whether the link is up/down using LINKSTATE_GET, but no additional information is given. Add attributes to LINKSTATE_GET command in order to allow drivers to expose the user more information in addition to link state to ease the debug process, for example, reason for link down state. Extended state consists of two attributes - link_ext_state and link_ext_substate. The idea is to avoid 'vendor specific' states in order to prevent drivers to use specific link_ext_state that can be in the future common link_ext_state. The substates allows drivers to add more information to the common link_ext_state. For example, vendor can expose 'Autoneg' as link_ext_state and add 'No partner detected during force mode' as link_ext_substate. If a driver cannot pinpoint the extended state with the substate accuracy, it is free to expose only the extended state and omit the substate attribute. Signed-off-by: Amit Cohen <amitc@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Reviewed-by: Petr Machata <petrm@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-29net:qos: police action offloading parameter 'burst' change to the original valuePo Liu1-1/+1
Since 'tcfp_burst' with TICK factor, driver side always need to recover it to the original value, this patch moves the generic calculation and recover to the 'burst' original value before offloading to device driver. Signed-off-by: Po Liu <po.liu@nxp.com> Acked-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-29mptcp: close poll() racesPaolo Abeni1-5/+20
mptcp_poll always return POLLOUT for unblocking connect(), ensure that the socket is a suitable state. The MPTCP_DATA_READY bit is never cleared on accept: ensure we don't leave mptcp_accept() with an empty accept queue and such bit set. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-29mptcp: __mptcp_tcp_fallback() returns a struct sockPaolo Abeni1-12/+10
Currently __mptcp_tcp_fallback() always return NULL on incoming connections, because MPTCP does not create the additional socket for the first subflow. Since the previous commit no __mptcp_tcp_fallback() caller needs a struct socket, so let __mptcp_tcp_fallback() return the first subflow sock and cope correctly even with incoming connections. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-29mptcp: create first subflow at msk creation timePaolo Abeni1-33/+20
This cleans the code a bit and makes the behavior more consistent. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-29mptcp: check for plain TCP sock at accept timePaolo Abeni1-62/+7
This cleanup the code a bit and avoid corrupted states on weird syscall sequence (accept(), connect()). Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-29mptcp: fallback in case of simultaneous connectDavide Caratti2-0/+20
when a MPTCP client tries to connect to itself, tcp_finish_connect() is never reached. Because of this, depending on the socket current state, multiple faulty behaviours can be observed: 1) a WARN_ON() in subflow_data_ready() is hit WARNING: CPU: 2 PID: 882 at net/mptcp/subflow.c:911 subflow_data_ready+0x18b/0x230 [...] CPU: 2 PID: 882 Comm: gh35 Not tainted 5.7.0+ #187 [...] RIP: 0010:subflow_data_ready+0x18b/0x230 [...] Call Trace: tcp_data_queue+0xd2f/0x4250 tcp_rcv_state_process+0xb1c/0x49d3 tcp_v4_do_rcv+0x2bc/0x790 __release_sock+0x153/0x2d0 release_sock+0x4f/0x170 mptcp_shutdown+0x167/0x4e0 __sys_shutdown+0xe6/0x180 __x64_sys_shutdown+0x50/0x70 do_syscall_64+0x9a/0x370 entry_SYSCALL_64_after_hwframe+0x44/0xa9 2) client is stuck forever in mptcp_sendmsg() because the socket is not TCP_ESTABLISHED crash> bt 4847 PID: 4847 TASK: ffff88814b2fb100 CPU: 1 COMMAND: "gh35" #0 [ffff8881376ff680] __schedule at ffffffff97248da4 #1 [ffff8881376ff778] schedule at ffffffff9724a34f #2 [ffff8881376ff7a0] schedule_timeout at ffffffff97252ba0 #3 [ffff8881376ff8a8] wait_woken at ffffffff958ab4ba #4 [ffff8881376ff940] sk_stream_wait_connect at ffffffff96c2d859 #5 [ffff8881376ffa28] mptcp_sendmsg at ffffffff97207fca #6 [ffff8881376ffbc0] sock_sendmsg at ffffffff96be1b5b #7 [ffff8881376ffbe8] sock_write_iter at ffffffff96be1daa #8 [ffff8881376ffce8] new_sync_write at ffffffff95e5cb52 #9 [ffff8881376ffe50] vfs_write at ffffffff95e6547f #10 [ffff8881376ffe90] ksys_write at ffffffff95e65d26 #11 [ffff8881376fff28] do_syscall_64 at ffffffff956088ba #12 [ffff8881376fff50] entry_SYSCALL_64_after_hwframe at ffffffff9740008c RIP: 00007f126f6956ed RSP: 00007ffc2a320278 RFLAGS: 00000217 RAX: ffffffffffffffda RBX: 0000000020000044 RCX: 00007f126f6956ed RDX: 0000000000000004 RSI: 00000000004007b8 RDI: 0000000000000003 RBP: 00007ffc2a3202a0 R8: 0000000000400720 R9: 0000000000400720 R10: 0000000000400720 R11: 0000000000000217 R12: 00000000004004b0 R13: 00007ffc2a320380 R14: 0000000000000000 R15: 0000000000000000 ORIG_RAX: 0000000000000001 CS: 0033 SS: 002b 3) tcpdump captures show that DSS is exchanged even when MP_CAPABLE handshake didn't complete. $ tcpdump -tnnr bad.pcap IP 127.0.0.1.20000 > 127.0.0.1.20000: Flags [S], seq 3208913911, win 65483, options [mss 65495,sackOK,TS val 3291706876 ecr 3291694721,nop,wscale 7,mptcp capable v1], length 0 IP 127.0.0.1.20000 > 127.0.0.1.20000: Flags [S.], seq 3208913911, ack 3208913912, win 65483, options [mss 65495,sackOK,TS val 3291706876 ecr 3291706876,nop,wscale 7,mptcp capable v1], length 0 IP 127.0.0.1.20000 > 127.0.0.1.20000: Flags [.], ack 1, win 512, options [nop,nop,TS val 3291706876 ecr 3291706876], length 0 IP 127.0.0.1.20000 > 127.0.0.1.20000: Flags [F.], seq 1, ack 1, win 512, options [nop,nop,TS val 3291707876 ecr 3291706876,mptcp dss fin seq 0 subseq 0 len 1,nop,nop], length 0 IP 127.0.0.1.20000 > 127.0.0.1.20000: Flags [.], ack 2, win 512, options [nop,nop,TS val 3291707876 ecr 3291707876], length 0 force a fallback to TCP in these cases, and adjust the main socket state to avoid hanging in mptcp_sendmsg(). Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/35 Reported-by: Christoph Paasch <cpaasch@apple.com> Suggested-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-29net: mptcp: improve fallback to TCPDavide Caratti4-89/+98
Keep using MPTCP sockets and a use "dummy mapping" in case of fallback to regular TCP. When fallback is triggered, skip addition of the MPTCP option on send. Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/11 Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/22 Co-developed-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-29Merge tag 'mlx5-tls-2020-06-26' of ↵David S. Miller1-6/+54
git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux Saeed Mahameed says: ==================== mlx5-tls-2020-06-26 1) Improve hardware layouts and structure for kTLS support 2) Generalize ICOSQ (Internal Channel Operations Send Queue) Due to the asynchronous nature of adding new kTLS flows and handling HW asynchronous kTLS resync requests, the XSK ICOSQ was extended to support generic async operations, such as kTLS add flow and resync, in addition to the existing XSK usages. 3) kTLS hardware flow steering and classification: The driver already has the means to classify TCP ipv4/6 flows to send them to the corresponding RSS HW engine, as reflected in patches 3 through 5, the series will add a steering layer that will hook to the driver's TCP classifiers and will match on well known kTLS connection, in case of a match traffic will be redirected to the kTLS decryption engine, otherwise traffic will continue flowing normally to the TCP RSS engine. 3) kTLS add flow RX HW offload support New offload contexts post their static/progress params WQEs (Work Queue Element) to communicate the newly added kTLS contexts over the per-channel async ICOSQ. The Channel/RQ is selected according to the socket's rxq index. A new TLS-RX workqueue is used to allow asynchronous addition of steering rules, out of the NAPI context. It will be also used in a downstream patch in the resync procedure. Feature is OFF by default. Can be turned on by: $ ethtool -K <if> tls-hw-rx-offload on 4) Added mlx5 kTLS sw stats and new counters are documented in Documentation/networking/tls-offload.rst rx_tls_ctx - number of TLS RX HW offload contexts added to device for decryption. rx_tls_ooo - number of RX packets which were part of a TLS stream but did not arrive in the expected order and triggered the resync procedure. rx_tls_del - number of TLS RX HW offload contexts deleted from device (connection has finished). rx_tls_err - number of RX packets which were part of a TLS stream but were not decrypted due to unexpected error in the state machine. 5) Asynchronous RX resync a. The NIC driver indicates that it would like to resync on some TLS record within the received packet (P), but the driver does not know (yet) which of the TLS records within the packet. At this stage, the NIC driver will query the device to find the exact TCP sequence for resync (tcpsn), however, the driver does not wait for the device to provide the response. b. Eventually, the device responds, and the driver provides the tcpsn within the resync packet to KTLS. Now, KTLS can check the tcpsn against any processed TLS records within packet P, and also against any record that is processed in the future within packet P. The asynchronous resync path simplifies the device driver, as it can save bits on the packet completion (32-bit TCP sequence), and pass this information on an asynchronous command instead. Performance: CPU: Intel(R) Xeon(R) CPU E5-2687W v4 @ 3.00GHz, 24 cores, HT off NIC: ConnectX-6 Dx 100GbE dual port Goodput (app-layer throughput) comparison: +---------------+-------+-------+---------+ | # connections | 1 | 4 | 8 | +---------------+-------+-------+---------+ | SW (Gbps) | 7.26 | 24.70 | 50.30 | +---------------+-------+-------+---------+ | HW (Gbps) | 18.50 | 64.30 | 92.90 | +---------------+-------+-------+---------+ | Speedup | 2.55x | 2.56x | 1.85x * | +---------------+-------+-------+---------+ * After linerate is reached, diff is observed in CPU util ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-29net: sched: sch_red: Add qevents "early_drop" and "mark"Petr Machata1-2/+56
In order to allow acting on dropped and/or ECN-marked packets, add two new qevents to the RED qdisc: "early_drop" and "mark". Filters attached at "early_drop" block are executed as packets are early-dropped, those attached at the "mark" block are executed as packets are ECN-marked. Two new attributes are introduced: TCA_RED_EARLY_DROP_BLOCK with the block index for the "early_drop" qevent, and TCA_RED_MARK_BLOCK for the "mark" qevent. Absence of these attributes signifies "don't care": no block is allocated in that case, or the existing blocks are left intact in case of the change callback. For purposes of offloading, blocks attached to these qevents appear with newly-introduced binder types, FLOW_BLOCK_BINDER_TYPE_RED_EARLY_DROP and FLOW_BLOCK_BINDER_TYPE_RED_MARK. Signed-off-by: Petr Machata <petrm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-29net: sched: sch_red: Split init and change callbacksPetr Machata1-12/+30
In the following patches, RED will get two qevents. The implementation will be clearer if the callback for change is not a pure subset of the callback for init. Split the two and promote attribute parsing to the callbacks themselves from the common code, because it will be handy there. Signed-off-by: Petr Machata <petrm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-29net: sched: Introduce helpers for qevent blocksPetr Machata1-0/+119
Qevents are attach points for TC blocks, where filters can be put that are executed when "interesting events" take place in a qdisc. The data to keep and the functions to invoke to maintain a qevent will be largely the same between qevents. Therefore introduce sched-wide helpers for qevent management. Currently, similarly to ingress and egress blocks of clsact pseudo-qdisc, blocks attachment cannot be changed after the qdisc is created. To that end, add a helper tcf_qevent_validate_change(), which verifies whether block index attribute is not attached, or if it is, whether its value matches the current one (i.e. there is no material change). The function tcf_qevent_handle() should be invoked when qdisc hits the "interesting event" corresponding to a block. This function releases root lock for the duration of executing the attached filters, to allow packets generated through user actions (notably mirred) to be reinserted to the same qdisc tree. Signed-off-by: Petr Machata <petrm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-29net: sched: Pass root lock to Qdisc_ops.enqueuePetr Machata34-69/+69
A following patch introduces qevents, points in qdisc algorithm where packet can be processed by user-defined filters. Should this processing lead to a situation where a new packet is to be enqueued on the same port, holding the root lock would lead to deadlocks. To solve the issue, qevent handler needs to unlock and relock the root lock when necessary. To that end, add the root lock argument to the qdisc op enqueue, and propagate throughout. Signed-off-by: Petr Machata <petrm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-28l2tp: fix l2tp_eth_dev_xmit()'s return typeLuc Van Oostenryck1-1/+1
The method ndo_start_xmit() is defined as returning an 'netdev_tx_t', which is a typedef for an enum type, but the implementation in this driver returns an 'int'. Fix this by returning 'netdev_tx_t' in this driver too. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-28net/hsr: fix hsr_dev_xmit()'s return typeLuc Van Oostenryck1-1/+1
The method ndo_start_xmit() is defined as returning an 'netdev_tx_t', which is a typedef for an enum type, but the implementation in this driver returns an 'int'. Fix this by returning 'netdev_tx_t' in this driver too. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-27tcp: update delivered_ce with deliveredYousuk Seung1-8/+21
Currently tp->delivered is updated in various places in tcp_ack() but tp->delivered_ce is updated once at the end. As a result two counts in OPT_STATS of SCM_TSTAMP_ACK timestamps generated in tcp_ack() may not be in sync. This patch updates both counts at the same in tcp_ack(). Signed-off-by: Yousuk Seung <ysseung@google.com> Signed-off-by: Yuchung Cheng <ycheng@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-27tcp: count sacked packets in tcp_sacktag_stateYousuk Seung1-0/+4
Add sack_delivered to tcp_sacktag_state and count the number of sacked and dsacked packets. This is pure refactor for future patches to improve tracking delivered counts. Signed-off-by: Yousuk Seung <ysseung@google.com> Signed-off-by: Yuchung Cheng <ycheng@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-27tcp: add ece_ack flag to reno sack functionsYousuk Seung1-10/+12
Pass a boolean flag that tells the ECE state of the current ack to reno sack functions. This is pure refactor for future patches to improve tracking delivered counts. Signed-off-by: Yousuk Seung <ysseung@google.com> Signed-off-by: Yuchung Cheng <ycheng@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-27tcp: stamp SCM_TSTAMP_ACK later in tcp_clean_rtx_queue()Yousuk Seung1-2/+2
Currently tp->delivered is updated with sacked packets but not cumulatively acked when SCP_TSTAMP_ACK is timestamped. This patch moves a tcp_ack_tstamp() call in tcp_clean_rtx_queue() to later in the loop so that when a skb is fully acked OPT_STATS of SCM_TSTAMP_ACK will include the current skb in the delivered count. When not fully acked tcp_ack_tstamp() is a no-op and there is no change in behavior. Signed-off-by: Yousuk Seung <ysseung@google.com> Signed-off-by: Yuchung Cheng <ycheng@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-27net/tls: Add asynchronous resyncBoris Pismenny1-0/+51
This patch adds support for asynchronous resynchronization in tls_device. Async resync follows two distinct stages: 1. The NIC driver indicates that it would like to resync on some TLS record within the received packet (P), but the driver does not know (yet) which of the TLS records within the packet. At this stage, the NIC driver will query the device to find the exact TCP sequence for resync (tcpsn), however, the driver does not wait for the device to provide the response. 2. Eventually, the device responds, and the driver provides the tcpsn within the resync packet to KTLS. Now, KTLS can check the tcpsn against any processed TLS records within packet P, and also against any record that is processed in the future within packet P. The asynchronous resync path simplifies the device driver, as it can save bits on the packet completion (32-bit TCP sequence), and pass this information on an asynchronous command instead. Signed-off-by: Boris Pismenny <borisp@mellanox.com> Signed-off-by: Tariq Toukan <tariqt@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-06-27Revert "net/tls: Add force_resync for driver resync"Boris Pismenny1-6/+3
This reverts commit b3ae2459f89773adcbf16fef4b68deaaa3be1929. Revert the force resync API. Not in use. To be replaced by a better async resync API downstream. Signed-off-by: Boris Pismenny <borisp@mellanox.com> Signed-off-by: Tariq Toukan <tariqt@mellanox.com> Reviewed-by: Maxim Mikityanskiy <maximmi@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-06-26mptcp: introduce token KUNIT self-testsPaolo Abeni4-2/+152
Unit tests for the internal MPTCP token APIs, using KUNIT v1 -> v2: - use the correct RCU annotation when initializing icsk ulp - fix a few checkpatch issues Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-26mptcp: move crypto test to KUNITPaolo Abeni4-67/+91
currently MPTCP uses a custom hook to executed unit tests at boot time. Let's use the KUNIT framework instead. Additionally move the relevant code to a separate file and export the function needed by the test when self-tests are build as a module. Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-26mptcp: refactor token containerPaolo Abeni4-113/+236
Replace the radix tree with a hash table allocated at boot time. The radix tree has some shortcoming: a single lock is contented by all the mptcp operation, the lookup currently use such lock, and traversing all the items would require a lock, too. With hash table instead we trade a little memory to address all the above - a per bucket lock is used. To hash the MPTCP sockets, we re-use the msk' sk_node entry: the MPTCP sockets are never hashed by the stack. Replace the existing hash proto callbacks with a dummy implementation, annotating the above constraint. Additionally refactor the token creation to code to: - limit the number of consecutive attempts to a fixed maximum. Hitting a hash bucket with a long chain is considered a failed attempt - accept() no longer can fail to token management. - if token creation fails at connect() time, we do fallback to TCP (before the connection was closed) v1 -> v2: - fix "no newline at end of file" - Jakub Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-26mptcp: add __init annotation on setup functionsPaolo Abeni5-10/+10
Add the missing annotation in some setup-only functions. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-26batman-adv: Introduce a configurable per interface hop penaltyLinus Lüssing5-12/+38
In some setups multiple hard interfaces with similar link qualities or throughput values are available. But people have expressed the desire to consider one of them as a backup only. Some creative solutions are currently in use: Such people are configuring multiple batman-adv mesh/soft interfaces, wire them together with some veth pairs and then tune the hop penalty to achieve an effect similar to a tunable per interface hop penalty. This patch introduces a new, configurable, per hard interface hop penalty to simplify such setups. Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2020-06-26batman-adv: Fix typos and grammar in documentationSven Eckelmann21-83/+84
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2020-06-26batman-adv: Start new development cycleSimon Wunderlich1-1/+1
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2020-06-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller107-283/+590
Minor overlapping changes in xfrm_device.c, between the double ESP trailing bug fix setting the XFRM_INIT flag and the changes in net-next preparing for bonding encryption support. Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netLinus Torvalds105-270/+580
Pull networking fixes from David Miller: 1) Don't insert ESP trailer twice in IPSEC code, from Huy Nguyen. 2) The default crypto algorithm selection in Kconfig for IPSEC is out of touch with modern reality, fix this up. From Eric Biggers. 3) bpftool is missing an entry for BPF_MAP_TYPE_RINGBUF, from Andrii Nakryiko. 4) Missing init of ->frame_sz in xdp_convert_zc_to_xdp_frame(), from Hangbin Liu. 5) Adjust packet alignment handling in ax88179_178a driver to match what the hardware actually does. From Jeremy Kerr. 6) register_netdevice can leak in the case one of the notifiers fail, from Yang Yingliang. 7) Use after free in ip_tunnel_lookup(), from Taehee Yoo. 8) VLAN checks in sja1105 DSA driver need adjustments, from Vladimir Oltean. 9) tg3 driver can sleep forever when we get enough EEH errors, fix from David Christensen. 10) Missing {READ,WRITE}_ONCE() annotations in various Intel ethernet drivers, from Ciara Loftus. 11) Fix scanning loop break condition in of_mdiobus_register(), from Florian Fainelli. 12) MTU limit is incorrect in ibmveth driver, from Thomas Falcon. 13) Endianness fix in mlxsw, from Ido Schimmel. 14) Use after free in smsc95xx usbnet driver, from Tuomas Tynkkynen. 15) Missing bridge mrp configuration validation, from Horatiu Vultur. 16) Fix circular netns references in wireguard, from Jason A. Donenfeld. 17) PTP initialization on recovery is not done properly in qed driver, from Alexander Lobakin. 18) Endian conversion of L4 ports in filters of cxgb4 driver is wrong, from Rahul Lakkireddy. 19) Don't clear bound device TX queue of socket prematurely otherwise we get problems with ktls hw offloading, from Tariq Toukan. 20) ipset can do atomics on unaligned memory, fix from Russell King. 21) Align ethernet addresses properly in bridging code, from Thomas Martitz. 22) Don't advertise ipv4 addresses on SCTP sockets having ipv6only set, from Marcelo Ricardo Leitner. * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (149 commits) rds: transport module should be auto loaded when transport is set sch_cake: fix a few style nits sch_cake: don't call diffserv parsing code when it is not needed sch_cake: don't try to reallocate or unshare skb unconditionally ethtool: fix error handling in linkstate_prepare_data() wil6210: account for napi_gro_receive never returning GRO_DROP hns: do not cast return value of napi_gro_receive to null socionext: account for napi_gro_receive never returning GRO_DROP wireguard: receive: account for napi_gro_receive never returning GRO_DROP vxlan: fix last fdb index during dump of fdb with nhid sctp: Don't advertise IPv4 addresses if ipv6only is set on the socket tc-testing: avoid action cookies with odd length. bpf: tcp: bpf_cubic: fix spurious HYSTART_DELAY exit upon drop in min RTT tcp_cubic: fix spurious HYSTART_DELAY exit upon drop in min RTT net: dsa: sja1105: fix tc-gate schedule with single element net: dsa: sja1105: recalculate gating subschedule after deleting tc-gate rules net: dsa: sja1105: unconditionally free old gating config net: dsa: sja1105: move sja1105_compose_gating_subschedule at the top net: macb: free resources on failure path of at91ether_open() net: macb: call pm_runtime_put_sync on failure path ...
2020-06-25sch_cake: add RFC 8622 LE PHB support to CAKE diffserv handlingKevin Darbyshire-Bryant1-4/+4
Change tin mapping on diffserv3, 4 & 8 for LE PHB support, in essence making LE a member of the Bulk tin. Bulk has the least priority and minimum of 1/16th total bandwidth in the face of higher priority traffic. NB: Diffserv 3 & 4 swap tin 0 & 1 priorities from the default order as found in diffserv8, in case anyone is wondering why it looks a bit odd. Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk> [ reword commit message slightly ] Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-25rds: transport module should be auto loaded when transport is setRao Shoaib1-9/+17
This enhancement auto loads transport module when the transport is set via SO_RDS_TRANSPORT socket option. Reviewed-by: Ka-Cheong Poon <ka-cheong.poon@oracle.com> Reviewed-by: Håkon Bugge <haakon.bugge@oracle.com> Signed-off-by: Rao Shoaib <rao.shoaib@oracle.com> Signed-off-by: Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-25sch_cake: fix a few style nitsToke Høiland-Jørgensen1-2/+2
I spotted a few nits when comparing the in-tree version of sch_cake with the out-of-tree one: A redundant error variable declaration shadowing an outer declaration, and an indentation alignment issue. Fix both of these. Fixes: 046f6fd5daef ("sched: Add Common Applications Kept Enhanced (cake) qdisc") Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-25sch_cake: don't call diffserv parsing code when it is not neededToke Høiland-Jørgensen1-4/+9
As a further optimisation of the diffserv parsing codepath, we can skip it entirely if CAKE is configured to neither use diffserv-based classification, nor to zero out the diffserv bits. Fixes: c87b4ecdbe8d ("sch_cake: Make sure we can write the IP header before changing DSCP bits") Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-25sch_cake: don't try to reallocate or unshare skb unconditionallyIlya Ponetayev1-11/+30
cake_handle_diffserv() tries to linearize mac and network header parts of skb and to make it writable unconditionally. In some cases it leads to full skb reallocation, which reduces throughput and increases CPU load. Some measurements of IPv4 forward + NAPT on MIPS router with 580 MHz single-core CPU was conducted. It appears that on kernel 4.9 skb_try_make_writable() reallocates skb, if skb was allocated in ethernet driver via so-called 'build skb' method from page cache (it was discovered by strange increase of kmalloc-2048 slab at first). Obtain DSCP value via read-only skb_header_pointer() call, and leave linearization only for DSCP bleaching or ECN CE setting. And, as an additional optimisation, skip diffserv parsing entirely if it is not needed by the current configuration. Fixes: c87b4ecdbe8d ("sch_cake: Make sure we can write the IP header before changing DSCP bits") Signed-off-by: Ilya Ponetayev <i.ponetaev@ndmsystems.com> [ fix a few style issues, reflow commit message ] Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-25ethtool: fix error handling in linkstate_prepare_data()Michal Kubecek1-6/+5
When getting SQI or maximum SQI value fails in linkstate_prepare_data(), we must not return without calling ethnl_ops_complete(dev) as that could result in imbalance between ethtool_ops ->begin() and ->complete() calls. Fixes: 806602191592 ("ethtool: provide UAPI for PHY Signal Quality Index (SQI)") Signed-off-by: Michal Kubecek <mkubecek@suse.cz> Signed-off-by: David S. Miller <davem@davemloft.net>
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