- 21 Feb, 2022 2 commits
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Ido Schimmel authored
In case user space sends a packet destined to a broadcast address when a matching broadcast route is not configured, the kernel will create a unicast neighbour entry that will never be resolved [1]. When the broadcast route is configured, the unicast neighbour entry will not be invalidated and continue to linger, resulting in packets being dropped. Solve this by invalidating unresolved neighbour entries for broadcast addresses after routes for these addresses are internally configured by the kernel. This allows the kernel to create a broadcast neighbour entry following the next route lookup. Another possible solution that is more generic but also more complex is to have the ARP code register a listener to the FIB notification chain and invalidate matching neighbour entries upon the addition of broadcast routes. It is also possible to wave off the issue as a user space problem, but it seems a bit excessive to expect user space to be that intimately familiar with the inner workings of the FIB/neighbour kernel code. [1] https://lore.kernel.org/netdev/55a04a8f-56f3-f73c-2aea-2195923f09d1@huawei.com/Reported-by:
Wang Hai <wanghai38@huawei.com> Signed-off-by:
Ido Schimmel <idosch@nvidia.com> Tested-by:
David S. Miller <davem@davemloft.net>
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Christophe Leroy authored
Open coded calculation can be avoided and replaced by the equivalent csum_replace_by_diff() and csum_sub(). Signed-off-by:
Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by:
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- 20 Feb, 2022 10 commits
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David S. Miller authored
Menglong Dong says: ==================== net: add skb drop reasons to TCP packet receive In the commit c504e5c2 ("net: skb: introduce kfree_skb_reason()"), we added the support of reporting the reasons of skb drops to kfree_skb tracepoint. And in this series patches, reasons for skb drops are added to TCP layer (both TCPv4 and TCPv6 are considered). Following functions are processed: tcp_v4_rcv() tcp_v6_rcv() tcp_v4_inbound_md5_hash() tcp_v6_inbound_md5_hash() tcp_add_backlog() tcp_v4_do_rcv() tcp_v6_do_rcv() tcp_rcv_established() tcp_data_queue() tcp_data_queue_ofo() The functions we handled are mostly for packet ingress, as skb drops hardly happens in the egress path of TCP layer. However, it's a little complex for TCP state processing, as I find that it's hard to report skb drop reasons to where it is freed. For example, when skb is dropped in tcp_rcv_state_process(), the reason can be caused by the call of tcp_v4_conn_request(), and it's hard to return a drop reason from tcp_v4_conn_request(). So such cases are skipped for this moment. Following new drop reasons are introduced (what they mean can be see in the document for them): /* SKB_DROP_REASON_TCP_MD5* corresponding to LINUX_MIB_TCPMD5* */ SKB_DROP_REASON_TCP_MD5NOTFOUND SKB_DROP_REASON_TCP_MD5UNEXPECTED SKB_DROP_REASON_TCP_MD5FAILURE SKB_DROP_REASON_SOCKET_BACKLOG SKB_DROP_REASON_TCP_FLAGS SKB_DROP_REASON_TCP_ZEROWINDOW SKB_DROP_REASON_TCP_OLD_DATA SKB_DROP_REASON_TCP_OVERWINDOW /* corresponding to LINUX_MIB_TCPOFOMERGE */ SKB_DROP_REASON_TCP_OFOMERGE Here is a example to get TCP packet drop reasons from ftrace: $ echo 1 > /sys/kernel/debug/tracing/events/skb/kfree_skb/enable $ cat /sys/kernel/debug/tracing/trace $ <idle>-0 [036] ..s1. 647.428165: kfree_skb: skbaddr=000000004d037db6 protocol=2048 location=0000000074cd1243 reason: NO_SOCKET $ <idle>-0 [020] ..s2. 639.676674: kfree_skb: skbaddr=00000000bcbfa42d protocol=2048 location=00000000bfe89d35 reason: PROTO_MEM From the reason 'PROTO_MEM' we can know that the skb is dropped because the memory configured in net.ipv4.tcp_mem is up to the limition. Changes since v2: - remove the 'inline' of tcp_drop() in the 1th patch, as Jakub suggested Changes since v1: - enrich the document for this series patches in the cover letter, as Eric suggested - fix compile warning report by Jakub in the 6th patch - let NO_SOCKET trump the XFRM failure in the 2th and 3th patches ==================== Signed-off-by:
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Menglong Dong authored
Replace tcp_drop() used in tcp_data_queue_ofo with tcp_drop_reason(). Following drop reasons are introduced: SKB_DROP_REASON_TCP_OFOMERGE Reviewed-by:
Mengen Sun <mengensun@tencent.com> Reviewed-by:
Hao Peng <flyingpeng@tencent.com> Signed-off-by:
Menglong Dong <imagedong@tencent.com> Reviewed-by:
Eric Dumazet <edumazet@google.com> Reviewed-by:
David Ahern <dsahern@kernel.org> Signed-off-by:
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Menglong Dong authored
Replace tcp_drop() used in tcp_data_queue() with tcp_drop_reason(). Following drop reasons are introduced: SKB_DROP_REASON_TCP_ZEROWINDOW SKB_DROP_REASON_TCP_OLD_DATA SKB_DROP_REASON_TCP_OVERWINDOW SKB_DROP_REASON_TCP_OLD_DATA is used for the case that end_seq of skb less than the left edges of receive window. (Maybe there is a better name?) Reviewed-by:
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Menglong Dong authored
Replace tcp_drop() used in tcp_rcv_established() with tcp_drop_reason(). Following drop reasons are added: SKB_DROP_REASON_TCP_FLAGS Reviewed-by:
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Menglong Dong authored
Replace kfree_skb() used in tcp_v4_do_rcv() and tcp_v6_do_rcv() with kfree_skb_reason(). Reviewed-by:
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Menglong Dong authored
Pass the address of drop_reason to tcp_add_backlog() to store the reasons for skb drops when fails. Following drop reasons are introduced: SKB_DROP_REASON_SOCKET_BACKLOG Reviewed-by:
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Menglong Dong authored
Pass the address of drop reason to tcp_v4_inbound_md5_hash() and tcp_v6_inbound_md5_hash() to store the reasons for skb drops when this function fails. Therefore, the drop reason can be passed to kfree_skb_reason() when the skb needs to be freed. Following drop reasons are added: SKB_DROP_REASON_TCP_MD5NOTFOUND SKB_DROP_REASON_TCP_MD5UNEXPECTED SKB_DROP_REASON_TCP_MD5FAILURE SKB_DROP_REASON_TCP_MD5* above correspond to LINUX_MIB_TCPMD5* Reviewed-by:
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Menglong Dong authored
Replace kfree_skb() used in tcp_v6_rcv() with kfree_skb_reason(). Reviewed-by:
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Menglong Dong authored
Use kfree_skb_reason() for some path in tcp_v4_rcv() that missed before, including: SKB_DROP_REASON_SOCKET_FILTER SKB_DROP_REASON_XFRM_POLICY Reviewed-by:
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Menglong Dong authored
For TCP protocol, tcp_drop() is used to free the skb when it needs to be dropped. To make use of kfree_skb_reason() and pass the drop reason to it, introduce the function tcp_drop_reason(). Meanwhile, make tcp_drop() an inline call to tcp_drop_reason(). Reviewed-by:
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- 19 Feb, 2022 28 commits
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Volodymyr Mytnyk authored
smatch warnings: drivers/net/ethernet/marvell/prestera/prestera_acl.c:103 prestera_acl_chain_to_client() error: buffer overflow 'client_map' 3 <= 3 prestera_acl_chain_to_client(u32 chain_index, ...) ... u32 client_map[] = { PRESTERA_HW_COUNTER_CLIENT_LOOKUP_0, PRESTERA_HW_COUNTER_CLIENT_LOOKUP_1, PRESTERA_HW_COUNTER_CLIENT_LOOKUP_2 }; if (chain_index > ARRAY_SIZE(client_map)) ... Fixes: fa5d824c ("net: prestera: acl: add multi-chain support offload") Reported-by:kernel test robot <lkp@intel.com> Reported-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
Volodymyr Mytnyk <vmytnyk@marvell.com> Signed-off-by:
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Ahmad Fatoum authored
The KSZ9477 SPI driver already has support for the KSZ8563. The same switch chip can also be managed via i2c and we have an KSZ9477 I2C driver, but that one lacks the relevant compatible entry. Add it. DT bindings already describe this compatible. Signed-off-by:
Ahmad Fatoum <a.fatoum@pengutronix.de> Signed-off-by:
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Dan Carpenter authored
These two error paths need to release_sock(sk) before returning. Fixes: a6a6fe27 ("net/smc: Dynamic control handshake limitation by socket options") Signed-off-by:
D. Wythe <alibuda@linux.alibaba.com> Signed-off-by:
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Oleksij Rempel authored
Provide access to HW offloaded packets over stats64 interface. The rx/tx_bytes values needed some fixing since HW is accounting size of the Ethernet frame together with FCS. Signed-off-by:
Oleksij Rempel <o.rempel@pengutronix.de> Reviewed-by:
Vladimir Oltean <olteanv@gmail.com> Signed-off-by:
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David S. Miller authored
Russell King says: ==================== net: phylink: remove pcs_poll This small series removes the now unused pcs_poll members from DSA and phylink. "git grep pcs_poll drivers/net/ net/" on net-next confirms that the only places that reference this are in DSA core code and phylink code: drivers/net/phy/phylink.c: if (pl->config->pcs_poll || pcs->poll) drivers/net/phy/phylink.c: poll |= pl->config->pcs_poll; net/dsa/port.c: dp->pl_config.pcs_poll = ds->pcs_poll; ==================== Signed-off-by: -
Russell King (Oracle) authored
phylink_config's pcs_poll is no longer used, let's get rid of it. Signed-off-by:
Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Signed-off-by:
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Russell King (Oracle) authored
With drivers converted over to using phylink PCS, there is no need for the struct dsa_switch member "pcs_poll" to exist anymore - there is a flag in the struct phylink_pcs which indicates whether this PCS needs to be polled which supersedes this. Signed-off-by:
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Juhee Kang authored
When hsr_create_self_node() calls hsr_node_get_first(), the suspicious RCU usage warning is occurred. The reason why this warning is raised is the callers of hsr_node_get_first() use rcu_read_lock_bh() and other different synchronization mechanisms. Thus, this patch solved by replacing rcu_dereference() with rcu_dereference_bh_check(). The kernel test robot reports: [ 50.083470][ T3596] ============================= [ 50.088648][ T3596] WARNING: suspicious RCU usage [ 50.093785][ T3596] 5.17.0-rc3-next-20220208-syzkaller #0 Not tainted [ 50.100669][ T3596] ----------------------------- [ 50.105513][ T3596] net/hsr/hsr_framereg.c:34 suspicious rcu_dereference_check() usage! [ 50.113799][ T3596] [ 50.113799][ T3596] other info that might help us debug this: [ 50.113799][ T3596] [ 50.124257][ T3596] [ 50.124257][ T3596] rcu_scheduler_active = 2, debug_locks = 1 [ 50.132368][ T3596] 2 locks held by syz-executor.0/3596: [ 50.137863][ T3596] #0: ffffffff8d3357e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3be/0xb80 [ 50.147470][ T3596] #1: ffff88807ec9d5f0 (&hsr->list_lock){+...}-{2:2}, at: hsr_create_self_node+0x225/0x650 [ 50.157623][ T3596] [ 50.157623][ T3596] stack backtrace: [ 50.163510][ T3596] CPU: 1 PID: 3596 Comm: syz-executor.0 Not tainted 5.17.0-rc3-next-20220208-syzkaller #0 [ 50.173381][ T3596] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.183623][ T3596] Call Trace: [ 50.186904][ T3596] <TASK> [ 50.189844][ T3596] dump_stack_lvl+0xcd/0x134 [ 50.194640][ T3596] hsr_node_get_first+0x9b/0xb0 [ 50.199499][ T3596] hsr_create_self_node+0x22d/0x650 [ 50.204688][ T3596] hsr_dev_finalize+0x2c1/0x7d0 [ 50.209669][ T3596] hsr_newlink+0x315/0x730 [ 50.214113][ T3596] ? hsr_dellink+0x130/0x130 [ 50.218789][ T3596] ? rtnl_create_link+0x7e8/0xc00 [ 50.223803][ T3596] ? hsr_dellink+0x130/0x130 [ 50.228397][ T3596] __rtnl_newlink+0x107c/0x1760 [ 50.233249][ T3596] ? rtnl_setlink+0x3c0/0x3c0 [ 50.238043][ T3596] ? is_bpf_text_address+0x77/0x170 [ 50.243362][ T3596] ? lock_downgrade+0x6e0/0x6e0 [ 50.248219][ T3596] ? unwind_next_frame+0xee1/0x1ce0 [ 50.253605][ T3596] ? entry_SYSCALL_64_after_hwframe+0x44/0xae [ 50.259669][ T3596] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 50.265423][ T3596] ? is_bpf_text_address+0x99/0x170 [ 50.270819][ T3596] ? kernel_text_address+0x39/0x80 [ 50.275950][ T3596] ? __kernel_text_address+0x9/0x30 [ 50.281336][ T3596] ? unwind_get_return_address+0x51/0x90 [ 50.286975][ T3596] ? create_prof_cpu_mask+0x20/0x20 [ 50.292178][ T3596] ? arch_stack_walk+0x93/0xe0 [ 50.297172][ T3596] ? kmem_cache_alloc_trace+0x42/0x2c0 [ 50.302637][ T3596] ? rcu_read_lock_sched_held+0x3a/0x70 [ 50.308194][ T3596] rtnl_newlink+0x64/0xa0 [ 50.312524][ T3596] ? __rtnl_newlink+0x1760/0x1760 [ 50.317545][ T3596] rtnetlink_rcv_msg+0x413/0xb80 [ 50.322631][ T3596] ? rtnl_newlink+0xa0/0xa0 [ 50.327159][ T3596] netlink_rcv_skb+0x153/0x420 [ 50.331931][ T3596] ? rtnl_newlink+0xa0/0xa0 [ 50.336436][ T3596] ? netlink_ack+0xa80/0xa80 [ 50.341095][ T3596] ? netlink_deliver_tap+0x1a2/0xc40 [ 50.346532][ T3596] ? netlink_deliver_tap+0x1b1/0xc40 [ 50.351839][ T3596] netlink_unicast+0x539/0x7e0 [ 50.356633][ T3596] ? netlink_attachskb+0x880/0x880 [ 50.361750][ T3596] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 50.368003][ T3596] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 50.374707][ T3596] ? __phys_addr_symbol+0x2c/0x70 [ 50.379753][ T3596] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 50.385568][ T3596] ? __check_object_size+0x16c/0x4f0 [ 50.390859][ T3596] netlink_sendmsg+0x904/0xe00 [ 50.395715][ T3596] ? netlink_unicast+0x7e0/0x7e0 [ 50.400722][ T3596] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 50.407003][ T3596] ? netlink_unicast+0x7e0/0x7e0 [ 50.412119][ T3596] sock_sendmsg+0xcf/0x120 [ 50.416548][ T3596] __sys_sendto+0x21c/0x320 [ 50.421052][ T3596] ? __ia32_sys_getpeername+0xb0/0xb0 [ 50.426427][ T3596] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 50.432721][ T3596] ? __context_tracking_exit+0xb8/0xe0 [ 50.438188][ T3596] ? lock_downgrade+0x6e0/0x6e0 [ 50.443041][ T3596] ? lock_downgrade+0x6e0/0x6e0 [ 50.447902][ T3596] __x64_sys_sendto+0xdd/0x1b0 [ 50.452759][ T3596] ? lockdep_hardirqs_on+0x79/0x100 [ 50.457964][ T3596] ? syscall_enter_from_user_mode+0x21/0x70 [ 50.464150][ T3596] do_syscall_64+0x35/0xb0 [ 50.468565][ T3596] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 50.474452][ T3596] RIP: 0033:0x7f3148504e1c [ 50.479052][ T3596] Code: fa fa ff ff 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 20 fb ff ff 48 8b [ 50.498926][ T3596] RSP: 002b:00007ffeab5f2ab0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c [ 50.507342][ T3596] RAX: ffffffffffffffda RBX: 00007f314959d320 RCX: 00007f3148504e1c [ 50.515393][ T3596] RDX: 0000000000000048 RSI: 00007f314959d370 RDI: 0000000000000003 [ 50.523444][ T3596] RBP: 0000000000000000 R08: 00007ffeab5f2b04 R09: 000000000000000c [ 50.531492][ T3596] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 [ 50.539455][ T3596] R13: 00007f314959d370 R14: 0000000000000003 R15: 0000000000000000 Fixes: 4acc45db ("net: hsr: use hlist_head instead of list_head for mac addresses") Reported-by:Eric Dumazet <eric.dumazet@gmail.com> Reported-and-tested-by: syzbot+f0eb4f3876de066b128c@syzkaller.appspotmail.com Signed-off-by:
Juhee Kang <claudiajkang@gmail.com> Signed-off-by:
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Christophe JAILLET authored
Use kcalloc() instead of kmalloc_array() and a loop to set all the values of the array to NULL. While at it, remove a duplicated assignment to 'scq->num_entries'. Signed-off-by:
Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by:
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David S. Miller authored
Radu Bulie says: ==================== Provide direct access to 1588 one step register DPAA2 MAC supports 1588 one step timestamping. If this option is enabled then for each transmitted PTP event packet, the 1588 SINGLE_STEP register is accessed to modify the following fields: -offset of the correction field inside the PTP packet -UDP checksum update bit, in case the PTP event packet has UDP encapsulation These values can change any time, because there may be multiple PTP clients connected, that receive various 1588 frame types: - L2 only frame - UDP / Ipv4 - UDP / Ipv6 - other The current implementation uses dpni_set_single_step_cfg to update the SINLGE_STEP register. Using an MC command on the Tx datapath for each transmitted 1588 message introduces high delays, leading to low throughput and consequently to a small number of supported PTP clients. Besides these, the nanosecond correction field from the PTP packet will contain the high delay from the driver which together with the originTimestamp will render timestamp values that are unacceptable in a GM clock implementation. This patch series replaces the dpni_set_single_step_cfg function call from the Tx datapath for 1588 messages (when one step timestamping is enabled) with a callback that either implements direct access to the SINGLE_STEP register, eliminating the overhead caused by the MC command that will need to be dispatched by the MC firmware through the MC command portal interface or falls back to the dpni_set_single_step_cfg in case the MC version does not have support for returning the single step register base address. In other words all the delay introduced by dpni_set_single_step_cfg function will be eliminated (if MC version has support for returning the base address of the single step register), improving the egress driver performance for PTP packets when single step timestamping is enabled. The first patch adds a new attribute that contains the base address of the SINGLE_STEP register. It will be used to directly update the register on the Tx datapath. The second patch updates the driver such that the SINGLE_STEP register is either accessed directly if MC version >= 10.32 or is accessed through dpni_set_single_step_cfg command when 1588 messages are transmitted. Changes in v2: - move global function pointer into the driver's private structure in 2/2 - move repetitive code outside the body of the callback functions in 2/2 - update function dpaa2_ptp_onestep_reg_update_method and remove goto statement from non error path in 2/2 Changes in v3: - remove static storage class specifier from within the structure in 2/2 ==================== Signed-off-by: -
Radu Bulie authored
DPAA2 MAC supports 1588 one step timestamping. If this option is enabled then for each transmitted PTP event packet, the 1588 SINGLE_STEP register is accessed to modify the following fields: -offset of the correction field inside the PTP packet -UDP checksum update bit, in case the PTP event packet has UDP encapsulation These values can change any time, because there may be multiple PTP clients connected, that receive various 1588 frame types: - L2 only frame - UDP / Ipv4 - UDP / Ipv6 - other The current implementation uses dpni_set_single_step_cfg to update the SINLGE_STEP register. Using an MC command on the Tx datapath for each transmitted 1588 message introduces high delays, leading to low throughput and consequently to a small number of supported PTP clients. Besides these, the nanosecond correction field from the PTP packet will contain the high delay from the driver which together with the originTimestamp will render timestamp values that are unacceptable in a GM clock implementation. This patch updates the Tx datapath for 1588 messages when single step timestamp is enabled and provides direct access to SINGLE_STEP register, eliminating the overhead caused by the dpni_set_single_step_cfg MC command. MC version >= 10.32 implements this functionality. If the MC version does not have support for returning the single step register base address, the driver will use dpni_set_single_step_cfg command for updates operations. All the delay introduced by dpni_set_single_step_cfg function will be eliminated (if MC version has support for returning the base address of the single step register), improving the egress driver performance for PTP packets when single step timestamping is enabled. Before these changes the maximum throughput for 1588 messages with single step hardware timestamp enabled was around 2000pps. After the updates the throughput increased up to 32.82 Mbps / 46631.02 pps. Signed-off-by:
Radu Bulie <radu-andrei.bulie@nxp.com> Signed-off-by:
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Radu Bulie authored
dpni_get_single_step_cfg is an MC firmware command used for retrieving the contents of SINGLE_STEP 1588 register available in a DPMAC. This patch adds a new version of this command that returns as an extra argument the physical base address of the aforementioned register. The address will be used to directly modify the contents of the SINGLE_STEP register instead of invoking the MC command dpni_set_single_step_cgf. The former approach introduced huge delays on the TX datapath when one step PTP events were transmitted. This led to low throughput and high latencies observed in the PTP correction field. Signed-off-by:
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Eric Dumazet authored
After recent patches, and in particular commits faab39f6 ("net: allow out-of-order netdev unregistration") and e5f80fcf ("ipv6: give an IPv6 dev to blackhole_netdev") we no longer need the barrier implemented in rtnl_lock_unregistering(). Signed-off-by:
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Volodymyr Mytnyk authored
Fix flower destroy template callback to release template only for specific tc chain instead of all chain tempaltes. The issue was intruduced by previous commit that introduced multi-chain support. Fixes: fa5d824c ("net: prestera: acl: add multi-chain support offload") Signed-off-by:
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Eric Dumazet authored
cleanup_net() is competing with other rtnl users. Instead of calling br_net_exit() for each netns, call br_net_exit_batch() once. This gives cleanup_net() ability to group more devices and call unregister_netdevice_many() only once for all bridge devices. Signed-off-by:
Nikolay Aleksandrov <razor@blackwall.org> Signed-off-by:
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David S. Miller authored
Matt Johnston says: ==================== MCTP I2C driver This patch series adds a netdev driver providing MCTP transport over I2C. I think I've addressed all the points raised in v5. It now has mctp_i2c_unregister() to run things in the correct order, waiting for the worker thread and I2C rx to complete. Cheers, Matt -- v6: - Changed netdev register/unregister/free to avoid races. Ensure that netif functions are not used by irq handler/threads after unregister. - Fix incoming I2C hwaddr that was previously incorrect (left shifted 1 bit) - Add a check that byte_count wire header matches the length received - Renamed I2C driver to mctp-i2c-interface - Removed __func__ from print messages, added missing newlines - Removed sysfs mctp_current_mux file which was used for debug - Renamed curr_lock to sel_lock - Tidied comment formatting - Fix newline in Kconfig v5: - Fix incorrect format string v4: - Switch to __i2c_transfer() rather than __i2c_smbus_xfer(), drop 255 byte smbus patches - Use wait_event_idle() for the sleeping TX thread - Use dev_addr_set() v3: - Added Reviewed-bys for npcm7xx - Resend with net-next open v2: - Simpler Kconfig condition for i2c-mux dependency, from Randy Dunlap ==================== Signed-off-by: -
Matt Johnston authored
Provides MCTP network transport over an I2C bus, as specified in DMTF DSP0237. All messages between nodes are sent as SMBus Block Writes. Each I2C bus to be used for MCTP is flagged in devicetree by a 'mctp-controller' property on the bus node. Each flagged bus gets a mctpi2cX net device created based on the bus number. A 'mctp-i2c-controller' I2C client needs to be added under the adapter. In an I2C mux situation the mctp-i2c-controller node must be attached only to the root I2C bus. The I2C client will handle incoming I2C slave block write data for subordinate busses as well as its own bus. In configurations without devicetree a driver instance can be attached to a bus using the I2C slave new_device mechanism. The MCTP core will hold/release the MCTP I2C device while responses are pending (a 6 second timeout or once a socket is closed, response received etc). While held the MCTP I2C driver will lock the I2C bus so that the correct I2C mux remains selected while responses are received. (Ideally we would just lock the mux to keep the current bus selected for the response rather than a full I2C bus lock, but that isn't exposed in the I2C mux API) Signed-off-by:
Matt Johnston <matt@codeconstruct.com.au> Signed-off-by:
Jeremy Kerr <jk@codeconstruct.com.au> Reviewed-by: Wolfram Sang <wsa@kernel.org> # I2C transport parts Signed-off-by:
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Matt Johnston authored
Used to define a local endpoint to communicate with MCTP peripherals attached to an I2C bus. This I2C endpoint can communicate with remote MCTP devices on the I2C bus. In the example I2C topology below (matching the second yaml example) we have MCTP devices on busses i2c1 and i2c6. MCTP-supporting busses are indicated by the 'mctp-controller' DT property on an I2C bus node. A mctp-i2c-controller I2C client DT node is placed at the top of the mux topology, since only the root I2C adapter will support I2C slave functionality. .-------. |eeprom | .------------. .------. /'-------' | adapter | | mux --@0,i2c5------' | i2c1 ----.*| --@1,i2c6--.--. |............| \'------' \ \ ......... | mctp-i2c- | \ \ \ .mctpB . | controller | \ \ '.0x30 . | | \ ......... \ '.......' | 0x50 | \ .mctpA . \ ......... '------------' '.0x1d . '.mctpC . '.......' '.0x31 . '.......' (mctpX boxes above are remote MCTP devices not included in the DT at present, they can be hotplugged/probed at runtime. A DT binding for specific fixed MCTP devices could be added later if required) Signed-off-by:Rob Herring <robh@kernel.org> Acked-by:
Wolfram Sang <wsa@kernel.org> Signed-off-by:
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Mobashshera Rasool authored
This patch adds support for MRT6MSG_WRMIFWHOLE which is used to pass full packet and real vif id when the incoming interface is wrong. While the RP and FHR are setting up state we need to be sending the registers encapsulated with all the data inside otherwise we lose it. The RP then decapsulates it and forwards it to the interested parties. Currently with WRONGMIF we can only be sending empty register packets and will lose that data. This behaviour can be enabled by using MRT_PIM with val == MRT6MSG_WRMIFWHOLE. This doesn't prevent MRT6MSG_WRONGMIF from happening, it happens in addition to it, also it is controlled by the same throttling parameters as WRONGMIF (i.e. 1 packet per 3 seconds currently). Both messages are generated to keep backwards compatibily and avoid breaking someone who was enabling MRT_PIM with val == 4, since any positive val is accepted and treated the same. Signed-off-by:
Mobashshera Rasool <mobash.rasool.linux@gmail.com> Signed-off-by:
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Alexander Lobakin authored
The 'if (ntu == rx_ring->count)' block in i40e_alloc_rx_buffers_zc() was previously residing in the loop, but after introducing the batched interface it is used only to wrap-around the NTU descriptor, thus no more need to assign 'xdp'. 'cleaned_count' in i40e_clean_rx_irq_zc() was previously being incremented in the loop, but after commit f12738b6 ("i40e: remove unnecessary cleaned_count updates") it gets assigned only once after it, so the initialization can be dropped. Fixes: 6aab0bb0 ("i40e: Use the xsk batched rx allocation interface") Fixes: f12738b6 ("i40e: remove unnecessary cleaned_count updates") Signed-off-by:
Alexander Lobakin <alexandr.lobakin@intel.com> Acked-by:
Maciej Fijalkowski <maciej.fijalkowski@intel.com> Tested-by:
George Kuruvinakunnel <george.kuruvinakunnel@intel.com> Signed-off-by:
Tony Nguyen <anthony.l.nguyen@intel.com> Signed-off-by:
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Jakub Kicinski authored
Jeremy Kerr says: ==================== Add checks for incoming packet addresses This series adds a couple of checks for valid addresses on incoming MCTP packets. We introduce a couple of helpers in 1/2, and use them in the ingress path in 2/2. ==================== Link: https://lore.kernel.org/r/20220218042554.564787-1-jk@codeconstruct.com.auSigned-off-by:
Jakub Kicinski <kuba@kernel.org>
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Jeremy Kerr authored
This change adds some basic sanity checks for the source and dest headers of packets on initial receive. Signed-off-by:
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Jeremy Kerr authored
Currently, we have mctp_address_ok(), which checks if an EID is in the "valid" range of 8-254 inclusive. However, 0 and 255 may also be valid addresses, depending on context. 0 is the NULL EID, which may be set when physical addressing is used. 255 is valid as a destination address for broadcasts. This change renames mctp_address_ok to mctp_address_unicast, and adds similar helpers for broadcast and null EIDs, which will be used in an upcoming commit. Signed-off-by:
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Jacques de Laval authored
This patch adds a new protocol attribute to IPv4 and IPv6 addresses. Inspiration was taken from the protocol attribute of routes. User space applications like iproute2 can set/get the protocol with the Netlink API. The attribute is stored as an 8-bit unsigned integer. The protocol attribute is set by kernel for these categories: - IPv4 and IPv6 loopback addresses - IPv6 addresses generated from router announcements - IPv6 link local addresses User space may pass custom protocols, not defined by the kernel. Grouping addresses on their origin is useful in scenarios where you want to distinguish between addresses based on who added them, e.g. kernel vs. user space. Tagging addresses with a string label is an existing feature that could be used as a solution. Unfortunately the max length of a label is 15 characters, and for compatibility reasons the label must be prefixed with the name of the device followed by a colon. Since device names also have a max length of 15 characters, only -1 characters is guaranteed to be available for any origin tag, which is not that much. A reference implementation of user space setting and getting protocols is available for iproute2: https://github.com/westermo/iproute2/commit/9a6ea18bd79f47f293e5edc7780f315ea42ff540Signed-off-by:
Jacques de Laval <Jacques.De.Laval@westermo.com> Reviewed-by:
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Jakub Kicinski authored
Shannon Nelson says: ==================== ionic: driver updates These are a couple of checkpatch cleanup patches, a bug fix, and something to alleviate memory pressure in tight places. ==================== Link: https://lore.kernel.org/r/20220217220252.52293-1-snelson@pensando.ioSigned-off-by:
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Shannon Nelson authored
Fix up some checkpatch complaints that have crept in: doubled words words, mispellled words, doubled lines. Signed-off-by:
Shannon Nelson <snelson@pensando.io> Signed-off-by:
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Shannon Nelson authored
Replace strlcpy with strscpy to clean up a checkpatch complaint. Signed-off-by:
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Brett Creeley authored
Use vzalloc for per-queue info structs that don't need any DMA mapping to help relieve memory pressure found when used in our limited SOC environment. Signed-off-by:
Brett Creeley <brett@pensando.io> Signed-off-by:
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