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* af_unix: Refactor unix_read_skb()Peilin Ye2022-09-261-24/+10
| | | | | | | | | | | | Similar to udp_read_skb(), delete the unnecessary while loop in unix_read_skb() for readability. Since recv_actor() cannot return a value greater than skb->len (see sk_psock_verdict_recv()), remove the redundant check. Suggested-by: Cong Wang <cong.wang@bytedance.com> Signed-off-by: Peilin Ye <peilin.ye@bytedance.com> Link: https://lore.kernel.org/r/7009141683ad6cd3785daced3e4a80ba0eb773b5.1663909008.git.peilin.ye@bytedance.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* af_unix: Show number of inflight fds for sockets in TCP_LISTEN state tooKirill Tkhai2022-08-221-3/+33
| | | | | | | | | | | TCP_LISTEN sockets is a special case. They preserve skb with a newly connected sock till accept() makes it fully functional socket. Receive queue of such socket may grow after connected peer send messages there. Since these messages may contain scm_fds, we should expose correct fdinfo::scm_fds for listening socket too. Signed-off-by: Kirill Tkhai <tkhai@ya.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextJakub Kicinski2022-07-091-14/+9
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Daniel Borkmann says: ==================== pull-request: bpf-next 2022-07-09 We've added 94 non-merge commits during the last 19 day(s) which contain a total of 125 files changed, 5141 insertions(+), 6701 deletions(-). The main changes are: 1) Add new way for performing BTF type queries to BPF, from Daniel Müller. 2) Add inlining of calls to bpf_loop() helper when its function callback is statically known, from Eduard Zingerman. 3) Implement BPF TCP CC framework usability improvements, from Jörn-Thorben Hinz. 4) Add LSM flavor for attaching per-cgroup BPF programs to existing LSM hooks, from Stanislav Fomichev. 5) Remove all deprecated libbpf APIs in prep for 1.0 release, from Andrii Nakryiko. 6) Add benchmarks around local_storage to BPF selftests, from Dave Marchevsky. 7) AF_XDP sample removal (given move to libxdp) and various improvements around AF_XDP selftests, from Magnus Karlsson & Maciej Fijalkowski. 8) Add bpftool improvements for memcg probing and bash completion, from Quentin Monnet. 9) Add arm64 JIT support for BPF-2-BPF coupled with tail calls, from Jakub Sitnicki. 10) Sockmap optimizations around throughput of UDP transmissions which have been improved by 61%, from Cong Wang. 11) Rework perf's BPF prologue code to remove deprecated functions, from Jiri Olsa. 12) Fix sockmap teardown path to avoid sleepable sk_psock_stop, from John Fastabend. 13) Fix libbpf's cleanup around legacy kprobe/uprobe on error case, from Chuang Wang. 14) Fix libbpf's bpf_helpers.h to work with gcc for the case of its sec/pragma macro, from James Hilliard. 15) Fix libbpf's pt_regs macros for riscv to use a0 for RC register, from Yixun Lan. 16) Fix bpftool to show the name of type BPF_OBJ_LINK, from Yafang Shao. * https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (94 commits) selftests/bpf: Fix xdp_synproxy build failure if CONFIG_NF_CONNTRACK=m/n bpf: Correctly propagate errors up from bpf_core_composites_match libbpf: Disable SEC pragma macro on GCC bpf: Check attach_func_proto more carefully in check_return_code selftests/bpf: Add test involving restrict type qualifier bpftool: Add support for KIND_RESTRICT to gen min_core_btf command MAINTAINERS: Add entry for AF_XDP selftests files selftests, xsk: Rename AF_XDP testing app bpf, docs: Remove deprecated xsk libbpf APIs description selftests/bpf: Add benchmark for local_storage RCU Tasks Trace usage libbpf, riscv: Use a0 for RC register libbpf: Remove unnecessary usdt_rel_ip assignments selftests/bpf: Fix few more compiler warnings selftests/bpf: Fix bogus uninitialized variable warning bpftool: Remove zlib feature test from Makefile libbpf: Cleanup the legacy uprobe_event on failed add/attach_event() libbpf: Fix wrong variable used in perf_event_uprobe_open_legacy() libbpf: Cleanup the legacy kprobe_event on failed add/attach_event() selftests/bpf: Add type match test against kernel's task_struct selftests/bpf: Add nested type to type based tests ... ==================== Link: https://lore.kernel.org/r/20220708233145.32365-1-daniel@iogearbox.net Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| * net: Introduce a new proto_ops ->read_skb()Cong Wang2022-06-201-14/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently both splice() and sockmap use ->read_sock() to read skb from receive queue, but for sockmap we only read one entire skb at a time, so ->read_sock() is too conservative to use. Introduce a new proto_ops ->read_skb() which supports this sematic, with this we can finally pass the ownership of skb to recv actors. For non-TCP protocols, all ->read_sock() can be simply converted to ->read_skb(). Signed-off-by: Cong Wang <cong.wang@bytedance.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: John Fastabend <john.fastabend@gmail.com> Link: https://lore.kernel.org/bpf/20220615162014.89193-3-xiyou.wangcong@gmail.com
* | af_unix: fix unix_sysctl_register() error pathEric Dumazet2022-07-091-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | We want to kfree(table) if @table has been kmalloced, ie for non initial network namespace. Fixes: 849d5aa3a1d8 ("af_unix: Do not call kmemdup() for init_net's sysctl table.") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Kuniyuki Iwashima <kuniyu@amazon.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Acked-by: Kuniyuki Iwashima <kuniyu@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | af_unix: Optimise hash table layout.Kuniyuki Iwashima2022-07-071-6/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 6dd4142fb5a9 ("Merge branch 'af_unix-per-netns-socket-hash'") and commit 51bae889fe11 ("af_unix: Put pathname sockets in the global hash table.") changed a hash table layout. Before: unix_socket_table [0 - 255] : abstract & pathname sockets [256 - 511] : unnamed sockets After: per-netns table [0 - 255] : abstract & pathname sockets [256 - 511] : unnamed sockets bsd_socket_table [0 - 255] : pathname sockets (sk_bind_node) Now, while looking up sockets, we traverse the global table for the pathname sockets and the first half of each per-netns hash table for abstract sockets, where pathname sockets are also linked. Thus, the more pathname sockets we have, the longer we take to look up abstract sockets. This characteristic has been there before the layout change, but we can improve it now. This patch changes the per-netns hash table's layout so that sockets not requiring lookup reside in the first half and do not impact the lookup of abstract sockets. per-netns table [0 - 255] : pathname & unnamed sockets [256 - 511] : abstract sockets bsd_socket_table [0 - 255] : pathname sockets (sk_bind_node) We have run a test that bind()s 100,000 abstract/pathname sockets for each, bind()s an abstract socket 100,000 times and measures the time on __unix_find_socket_byname(). The result shows that the patch makes each lookup faster. Without this patch: $ sudo ./funclatency -p 2278 --microseconds __unix_find_socket_byname.isra.44 usec : count distribution 0 -> 1 : 0 | | 2 -> 3 : 0 | | 4 -> 7 : 0 | | 8 -> 15 : 126 | | 16 -> 31 : 1438 |* | 32 -> 63 : 4150 |*** | 64 -> 127 : 9049 |******* | 128 -> 255 : 37704 |******************************* | 256 -> 511 : 47533 |****************************************| With this patch: $ sudo ./funclatency -p 3648 --microseconds __unix_find_socket_byname.isra.46 usec : count distribution 0 -> 1 : 109 | | 2 -> 3 : 318 | | 4 -> 7 : 725 | | 8 -> 15 : 2501 |* | 16 -> 31 : 3061 |** | 32 -> 63 : 4028 |*** | 64 -> 127 : 9312 |******* | 128 -> 255 : 51372 |****************************************| 256 -> 511 : 28574 |********************** | Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> Link: https://lore.kernel.org/r/20220705233715.759-1-kuniyu@amazon.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
* | af_unix: Put pathname sockets in the global hash table.Kuniyuki Iwashima2022-07-051-10/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit cf2f225e2653 ("af_unix: Put a socket into a per-netns hash table.") accidentally broke user API for pathname sockets. A socket was able to connect() to a pathname socket whose file was visible even if they were in different network namespaces. The commit puts all sockets into a per-netns hash table. As a result, connect() to a pathname socket in a different netns fails to find it in the caller's per-netns hash table and returns -ECONNREFUSED even when the task can view the peer socket file. We can reproduce this issue by: Console A: # python3 >>> from socket import * >>> s = socket(AF_UNIX, SOCK_STREAM, 0) >>> s.bind('test') >>> s.listen(32) Console B: # ip netns add test # ip netns exec test sh # python3 >>> from socket import * >>> s = socket(AF_UNIX, SOCK_STREAM, 0) >>> s.connect('test') Note when dumping sockets by sock_diag, procfs, and bpf_iter, they are filtered only by netns. In other words, even if they are visible and connect()able, all sockets in different netns are skipped while iterating sockets. Thus, we need a fix only for finding a peer pathname socket. This patch adds a global hash table for pathname sockets, links them with sk_bind_node, and uses it in unix_find_socket_byinode(). By doing so, we can keep sockets in per-netns hash tables and dump them easily. Thanks to Sachin Sant and Leonard Crestez for reports, logs and a reproducer. Fixes: cf2f225e2653 ("af_unix: Put a socket into a per-netns hash table.") Reported-by: Sachin Sant <sachinp@linux.ibm.com> Reported-by: Leonard Crestez <cdleonard@gmail.com> Tested-by: Sachin Sant <sachinp@linux.ibm.com> Tested-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> Tested-by: Leonard Crestez <cdleonard@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
* | af_unix: Do not call kmemdup() for init_net's sysctl table.Kuniyuki Iwashima2022-06-281-6/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | While setting up init_net's sysctl table, we need not duplicate the global table and can use it directly as ipv4_sysctl_init_net() does. Unlike IPv4, AF_UNIX does not have a huge sysctl table for now, so it cannot be a problem, but this patch makes code consistent. Acked-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> Link: https://lore.kernel.org/r/20220627233627.51646-1-kuniyu@amazon.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* | af_unix: Remove unix_table_locks.Kuniyuki Iwashima2022-06-222-41/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | unix_table_locks are to protect the global hash table, unix_socket_table. The previous commit removed it, so let's clean up the unnecessary locks. Here is a test result on EC2 c5.9xlarge where 10 processes run concurrently in different netns and bind 100,000 sockets for each. without this series : 1m 38s with this series : 11s It is ~10x faster because the global hash table is split into 10 netns in this case. Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | af_unix: Put a socket into a per-netns hash table.Kuniyuki Iwashima2022-06-222-36/+23
| | | | | | | | | | | | | | | | | | | | | | This commit replaces the global hash table with a per-netns one and removes the global one. We now link a socket in each netns's hash table so we can save some netns comparisons when iterating through a hash bucket. Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | af_unix: Acquire/Release per-netns hash table's locks.Kuniyuki Iwashima2022-06-222-32/+66
| | | | | | | | | | | | | | | | | | | | | | | | | | This commit adds extra spin_lock/spin_unlock() for a per-netns hash table inside the existing ones for unix_table_locks. As of this commit, sockets are still linked in the global hash table. After putting sockets in a per-netns hash table and removing the old one in the next patch, we remove the global locks in the last patch. Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | af_unix: Define a per-netns hash table.Kuniyuki Iwashima2022-06-221-6/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This commit adds a per netns hash table for AF_UNIX, which size is fixed as UNIX_HASH_SIZE for now. The first implementation defines a per-netns hash table as a single array of lock and list: struct unix_hashbucket { spinlock_t lock; struct hlist_head head; }; struct netns_unix { struct unix_hashbucket *hash; ... }; But, Eric pointed out memory cost that the structure has holes because of sizeof(spinlock_t), which is 4 (or more if LOCKDEP is enabled). [0] It could be expensive on a host with thousands of netns and few AF_UNIX sockets. For this reason, a per-netns hash table uses two dense arrays. struct unix_table { spinlock_t *locks; struct hlist_head *buckets; }; struct netns_unix { struct unix_table table; ... }; Note the length of the list has a significant impact rather than lock contention, so having shared locks can be an option. But, per-netns locks and lists still perform better than the global locks and per-netns lists. [1] Also, this patch adds a change so that struct netns_unix disappears from struct net if CONFIG_UNIX is disabled. [0]: https://lore.kernel.org/netdev/CANn89iLVxO5aqx16azNU7p7Z-nz5NrnM5QTqOzueVxEnkVTxyg@mail.gmail.com/ [1]: https://lore.kernel.org/netdev/20220617175215.1769-1-kuniyu@amazon.com/ Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | af_unix: Include the whole hash table size in UNIX_HASH_SIZE.Kuniyuki Iwashima2022-06-222-13/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, the size of AF_UNIX hash table is UNIX_HASH_SIZE * 2, the first half for bind()ed sockets and the second half for unbound ones. UNIX_HASH_SIZE * 2 is used to define the table and iterate over it. In some places, we use ARRAY_SIZE(unix_socket_table) instead of UNIX_HASH_SIZE * 2. However, we cannot use it anymore because we will allocate the hash table dynamically. Then, we would have to add UNIX_HASH_SIZE * 2 in many places, which would be troublesome. This patch adapts the UNIX_HASH_SIZE definition to include bound and unbound sockets and defines a new UNIX_HASH_MOD macro to ease calculations. Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | af_unix: Clean up some sock_net() uses.Kuniyuki Iwashima2022-06-222-21/+15
|/ | | | | | | | | Some functions define a net pointer only for one-shot use. Others call sock_net() redundantly even when a net pointer is available. Let's fix these and make the code simpler. Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* af_unix: use DEBUG_NET_WARN_ON_ONCE()Eric Dumazet2022-06-091-4/+4
| | | | | | | | Replace four WARN_ON() that have not triggered recently with DEBUG_NET_WARN_ON_ONCE(). Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* af_unix: Fix a data-race in unix_dgram_peer_wake_me().Kuniyuki Iwashima2022-06-071-1/+1
| | | | | | | | | | | | unix_dgram_poll() calls unix_dgram_peer_wake_me() without `other`'s lock held and check if its receive queue is full. Here we need to use unix_recvq_full_lockless() instead of unix_recvq_full(), otherwise KCSAN will report a data-race. Fixes: 7d267278a9ec ("unix: avoid use-after-free in ep_remove_wait_queue") Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> Link: https://lore.kernel.org/r/20220605232325.11804-1-kuniyu@amazon.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
* Merge tag 'net-next-5.19' of ↵Linus Torvalds2022-05-252-9/+7
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core ---- - Support TCPv6 segmentation offload with super-segments larger than 64k bytes using the IPv6 Jumbogram extension header (AKA BIG TCP). - Generalize skb freeing deferral to per-cpu lists, instead of per-socket lists. - Add a netdev statistic for packets dropped due to L2 address mismatch (rx_otherhost_dropped). - Continue work annotating skb drop reasons. - Accept alternative netdev names (ALT_IFNAME) in more netlink requests. - Add VLAN support for AF_PACKET SOCK_RAW GSO. - Allow receiving skb mark from the socket as a cmsg. - Enable memcg accounting for veth queues, sysctl tables and IPv6. BPF --- - Add libbpf support for User Statically-Defined Tracing (USDTs). - Speed up symbol resolution for kprobes multi-link attachments. - Support storing typed pointers to referenced and unreferenced objects in BPF maps. - Add support for BPF link iterator. - Introduce access to remote CPU map elements in BPF per-cpu map. - Allow middle-of-the-road settings for the kernel.unprivileged_bpf_disabled sysctl. - Implement basic types of dynamic pointers e.g. to allow for dynamically sized ringbuf reservations without extra memory copies. Protocols --------- - Retire port only listening_hash table, add a second bind table hashed by port and address. Avoid linear list walk when binding to very popular ports (e.g. 443). - Add bridge FDB bulk flush filtering support allowing user space to remove all FDB entries matching a condition. - Introduce accept_unsolicited_na sysctl for IPv6 to implement router-side changes for RFC9131. - Support for MPTCP path manager in user space. - Add MPTCP support for fallback to regular TCP for connections that have never connected additional subflows or transmitted out-of-sequence data (partial support for RFC8684 fallback). - Avoid races in MPTCP-level window tracking, stabilize and improve throughput. - Support lockless operation of GRE tunnels with seq numbers enabled. - WiFi support for host based BSS color collision detection. - Add support for SO_TXTIME/SCM_TXTIME on CAN sockets. - Support transmission w/o flow control in CAN ISOTP (ISO 15765-2). - Support zero-copy Tx with TLS 1.2 crypto offload (sendfile). - Allow matching on the number of VLAN tags via tc-flower. - Add tracepoint for tcp_set_ca_state(). Driver API ---------- - Improve error reporting from classifier and action offload. - Add support for listing line cards in switches (devlink). - Add helpers for reporting page pool statistics with ethtool -S. - Add support for reading clock cycles when using PTP virtual clocks, instead of having the driver convert to time before reporting. This makes it possible to report time from different vclocks. - Support configuring low-latency Tx descriptor push via ethtool. - Separate Clause 22 and Clause 45 MDIO accesses more explicitly. New hardware / drivers ---------------------- - Ethernet: - Marvell's Octeon NIC PCI Endpoint support (octeon_ep) - Sunplus SP7021 SoC (sp7021_emac) - Add support for Renesas RZ/V2M (in ravb) - Add support for MediaTek mt7986 switches (in mtk_eth_soc) - Ethernet PHYs: - ADIN1100 industrial PHYs (w/ 10BASE-T1L and SQI reporting) - TI DP83TD510 PHY - Microchip LAN8742/LAN88xx PHYs - WiFi: - Driver for pureLiFi X, XL, XC devices (plfxlc) - Driver for Silicon Labs devices (wfx) - Support for WCN6750 (in ath11k) - Support Realtek 8852ce devices (in rtw89) - Mobile: - MediaTek T700 modems (Intel 5G 5000 M.2 cards) - CAN: - ctucanfd: add support for CTU CAN FD open-source IP core from Czech Technical University in Prague Drivers ------- - Delete a number of old drivers still using virt_to_bus(). - Ethernet NICs: - intel: support TSO on tunnels MPLS - broadcom: support multi-buffer XDP - nfp: support VF rate limiting - sfc: use hardware tx timestamps for more than PTP - mlx5: multi-port eswitch support - hyper-v: add support for XDP_REDIRECT - atlantic: XDP support (including multi-buffer) - macb: improve real-time perf by deferring Tx processing to NAPI - High-speed Ethernet switches: - mlxsw: implement basic line card information querying - prestera: add support for traffic policing on ingress and egress - Embedded Ethernet switches: - lan966x: add support for packet DMA (FDMA) - lan966x: add support for PTP programmable pins - ti: cpsw_new: enable bc/mc storm prevention - Qualcomm 802.11ax WiFi (ath11k): - Wake-on-WLAN support for QCA6390 and WCN6855 - device recovery (firmware restart) support - support setting Specific Absorption Rate (SAR) for WCN6855 - read country code from SMBIOS for WCN6855/QCA6390 - enable keep-alive during WoWLAN suspend - implement remain-on-channel support - MediaTek WiFi (mt76): - support Wireless Ethernet Dispatch offloading packet movement between the Ethernet switch and WiFi interfaces - non-standard VHT MCS10-11 support - mt7921 AP mode support - mt7921 IPv6 NS offload support - Ethernet PHYs: - micrel: ksz9031/ksz9131: cabletest support - lan87xx: SQI support for T1 PHYs - lan937x: add interrupt support for link detection" * tag 'net-next-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1809 commits) ptp: ocp: Add firmware header checks ptp: ocp: fix PPS source selector debugfs reporting ptp: ocp: add .init function for sma_op vector ptp: ocp: vectorize the sma accessor functions ptp: ocp: constify selectors ptp: ocp: parameterize input/output sma selectors ptp: ocp: revise firmware display ptp: ocp: add Celestica timecard PCI ids ptp: ocp: Remove #ifdefs around PCI IDs ptp: ocp: 32-bit fixups for pci start address Revert "net/smc: fix listen processing for SMC-Rv2" ath6kl: Use cc-disable-warning to disable -Wdangling-pointer selftests/bpf: Dynptr tests bpf: Add dynptr data slices bpf: Add bpf_dynptr_read and bpf_dynptr_write bpf: Dynptr support for ring buffers bpf: Add bpf_dynptr_from_mem for local dynptrs bpf: Add verifier support for dynptrs bpf: Suppress 'passing zero to PTR_ERR' warning bpf: Introduce bpf_arch_text_invalidate for bpf_prog_pack ...
| * net: remove noblock parameter from recvmsg() entitiesOliver Hartkopp2022-04-122-7/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The internal recvmsg() functions have two parameters 'flags' and 'noblock' that were merged inside skb_recv_datagram(). As a follow up patch to commit f4b41f062c42 ("net: remove noblock parameter from skb_recv_datagram()") this patch removes the separate 'noblock' parameter for recvmsg(). Analogue to the referenced patch for skb_recv_datagram() the 'flags' and 'noblock' parameters are unnecessarily split up with e.g. err = sk->sk_prot->recvmsg(sk, msg, size, flags & MSG_DONTWAIT, flags & ~MSG_DONTWAIT, &addr_len); or in err = INDIRECT_CALL_2(sk->sk_prot->recvmsg, tcp_recvmsg, udp_recvmsg, sk, msg, size, flags & MSG_DONTWAIT, flags & ~MSG_DONTWAIT, &addr_len); instead of simply using only flags all the time and check for MSG_DONTWAIT where needed (to preserve for the formerly separated no(n)block condition). Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Link: https://lore.kernel.org/r/20220411124955.154876-1-socketcan@hartkopp.net Signed-off-by: Paolo Abeni <pabeni@redhat.com>
| * net: remove noblock parameter from skb_recv_datagram()Oliver Hartkopp2022-04-061-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | skb_recv_datagram() has two parameters 'flags' and 'noblock' that are merged inside skb_recv_datagram() by 'flags | (noblock ? MSG_DONTWAIT : 0)' As 'flags' may contain MSG_DONTWAIT as value most callers split the 'flags' into 'flags' and 'noblock' with finally obsolete bit operations like this: skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &rc); And this is not even done consistently with the 'flags' parameter. This patch removes the obsolete and costly splitting into two parameters and only performs bit operations when really needed on the caller side. One missing conversion thankfully reported by kernel test robot. I missed to enable kunit tests to build the mctp code. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* | af_unix: Silence randstruct GCC plugin warningKees Cook2022-05-161-5/+3
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | While preparing for Clang randstruct support (which duplicated many of the warnings the randstruct GCC plugin warned about), one strange one remained only for the randstruct GCC plugin. Eliminating this rids the plugin of the last exception. It seems the plugin is happy to dereference individual members of a cross-struct cast, but it is upset about casting to a whole object pointer. This only manifests in one place in the kernel, so just replace the variable with individual member accesses. There is no change in executable instruction output. Drop the last exception from the randstruct GCC plugin. Cc: "David S. Miller" <davem@davemloft.net> Cc: Christoph Hellwig <hch@infradead.org> Cc: Paolo Abeni <pabeni@redhat.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Cong Wang <cong.wang@bytedance.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: netdev@vger.kernel.org Cc: linux-hardening@vger.kernel.org Acked-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Link: https://lore.kernel.org/lkml/20220511022217.58586-1-kuniyu@amazon.co.jp Acked-by: Jakub Kicinski <kuba@kernel.org> Link: https://lore.kernel.org/lkml/20220511151542.4cb3ff17@kernel.org Signed-off-by: Kees Cook <keescook@chromium.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski2022-03-231-7/+9
|\ | | | | | | | | | | Merge in overtime fixes, no conflicts. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| * af_unix: Support POLLPRI for OOB.Kuniyuki Iwashima2022-03-181-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The commit 314001f0bf92 ("af_unix: Add OOB support") introduced OOB for AF_UNIX, but it lacks some changes for POLLPRI. Let's add the missing piece. In the selftest, normal datagrams are sent followed by OOB data, so this commit replaces `POLLIN | POLLPRI` with just `POLLPRI` in the first test case. Fixes: 314001f0bf92 ("af_unix: Add OOB support") Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
| * af_unix: Fix some data-races around unix_sk(sk)->oob_skb.Kuniyuki Iwashima2022-03-181-7/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Out-of-band data automatically places a "mark" showing wherein the sequence the out-of-band data would have been. If the out-of-band data implies cancelling everything sent so far, the "mark" is helpful to flush them. When the socket's read pointer reaches the "mark", the ioctl() below sets a non zero value to the arg `atmark`: The out-of-band data is queued in sk->sk_receive_queue as well as ordinary data and also saved in unix_sk(sk)->oob_skb. It can be used to test if the head of the receive queue is the out-of-band data meaning the socket is at the "mark". While testing that, unix_ioctl() reads unix_sk(sk)->oob_skb locklessly. Thus, all accesses to oob_skb need some basic protection to avoid load/store tearing which KCSAN detects when these are called concurrently: - ioctl(fd_a, SIOCATMARK, &atmark, sizeof(atmark)) - send(fd_b_connected_to_a, buf, sizeof(buf), MSG_OOB) BUG: KCSAN: data-race in unix_ioctl / unix_stream_sendmsg write to 0xffff888003d9cff0 of 8 bytes by task 175 on cpu 1: unix_stream_sendmsg (net/unix/af_unix.c:2087 net/unix/af_unix.c:2191) sock_sendmsg (net/socket.c:705 net/socket.c:725) __sys_sendto (net/socket.c:2040) __x64_sys_sendto (net/socket.c:2048) do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:113) read to 0xffff888003d9cff0 of 8 bytes by task 176 on cpu 0: unix_ioctl (net/unix/af_unix.c:3101 (discriminator 1)) sock_do_ioctl (net/socket.c:1128) sock_ioctl (net/socket.c:1242) __x64_sys_ioctl (fs/ioctl.c:52 fs/ioctl.c:874 fs/ioctl.c:860 fs/ioctl.c:860) do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:113) value changed: 0xffff888003da0c00 -> 0xffff888003da0d00 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 176 Comm: unix_race_oob_i Not tainted 5.17.0-rc5-59529-g83dc4c2af682 #12 Hardware name: Red Hat KVM, BIOS 1.11.0-2.amzn2 04/01/2014 Fixes: 314001f0bf92 ("af_unix: Add OOB support") Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
* | af_unix: Remove unnecessary brackets around CONFIG_AF_UNIX_OOB.Kuniyuki Iwashima2022-03-181-3/+3
| | | | | | | | | | | | | | | | Let's remove unnecessary brackets around CONFIG_AF_UNIX_OOB. Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Link: https://lore.kernel.org/r/20220317032308.65372-1-kuniyu@amazon.co.jp Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* | Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextJakub Kicinski2022-01-241-28/+222
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Daniel Borkmann says: ==================== pull-request: bpf-next 2022-01-24 We've added 80 non-merge commits during the last 14 day(s) which contain a total of 128 files changed, 4990 insertions(+), 895 deletions(-). The main changes are: 1) Add XDP multi-buffer support and implement it for the mvneta driver, from Lorenzo Bianconi, Eelco Chaudron and Toke Høiland-Jørgensen. 2) Add unstable conntrack lookup helpers for BPF by using the BPF kfunc infra, from Kumar Kartikeya Dwivedi. 3) Extend BPF cgroup programs to export custom ret value to userspace via two helpers bpf_get_retval() and bpf_set_retval(), from YiFei Zhu. 4) Add support for AF_UNIX iterator batching, from Kuniyuki Iwashima. 5) Complete missing UAPI BPF helper description and change bpf_doc.py script to enforce consistent & complete helper documentation, from Usama Arif. 6) Deprecate libbpf's legacy BPF map definitions and streamline XDP APIs to follow tc-based APIs, from Andrii Nakryiko. 7) Support BPF_PROG_QUERY for BPF programs attached to sockmap, from Di Zhu. 8) Deprecate libbpf's bpf_map__def() API and replace users with proper getters and setters, from Christy Lee. 9) Extend libbpf's btf__add_btf() with an additional hashmap for strings to reduce overhead, from Kui-Feng Lee. 10) Fix bpftool and libbpf error handling related to libbpf's hashmap__new() utility function, from Mauricio Vásquez. 11) Add support to BTF program names in bpftool's program dump, from Raman Shukhau. 12) Fix resolve_btfids build to pick up host flags, from Connor O'Brien. * https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (80 commits) selftests, bpf: Do not yet switch to new libbpf XDP APIs selftests, xsk: Fix rx_full stats test bpf: Fix flexible_array.cocci warnings xdp: disable XDP_REDIRECT for xdp frags bpf: selftests: add CPUMAP/DEVMAP selftests for xdp frags bpf: selftests: introduce bpf_xdp_{load,store}_bytes selftest net: xdp: introduce bpf_xdp_pointer utility routine bpf: generalise tail call map compatibility check libbpf: Add SEC name for xdp frags programs bpf: selftests: update xdp_adjust_tail selftest to include xdp frags bpf: test_run: add xdp_shared_info pointer in bpf_test_finish signature bpf: introduce frags support to bpf_prog_test_run_xdp() bpf: move user_size out of bpf_test_init bpf: add frags support to xdp copy helpers bpf: add frags support to the bpf_xdp_adjust_tail() API bpf: introduce bpf_xdp_get_buff_len helper net: mvneta: enable jumbo frames if the loaded XDP program support frags bpf: introduce BPF_F_XDP_HAS_FRAGS flag in prog_flags loading the ebpf program net: mvneta: add frags support to XDP_TX xdp: add frags support to xdp_return_{buff/frame} ... ==================== Link: https://lore.kernel.org/r/20220124221235.18993-1-daniel@iogearbox.net Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| * bpf: Support bpf_(get|set)sockopt() in bpf unix iter.Kuniyuki Iwashima2022-01-181-0/+15
| | | | | | | | | | | | | | | | | | This patch makes bpf_(get|set)sockopt() available when iterating AF_UNIX sockets. Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Link: https://lore.kernel.org/r/20220113002849.4384-4-kuniyu@amazon.co.jp Signed-off-by: Alexei Starovoitov <ast@kernel.org>
| * bpf: af_unix: Use batching algorithm in bpf unix iter.Kuniyuki Iwashima2022-01-181-7/+177
| | | | | | | | | | | | | | | | | | | | | | | | The commit 04c7820b776f ("bpf: tcp: Bpf iter batching and lock_sock") introduces the batching algorithm to iterate TCP sockets with more consistency. This patch uses the same algorithm to iterate AF_UNIX sockets. Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Link: https://lore.kernel.org/r/20220113002849.4384-3-kuniyu@amazon.co.jp Signed-off-by: Alexei Starovoitov <ast@kernel.org>
| * af_unix: Refactor unix_next_socket().Kuniyuki Iwashima2022-01-181-21/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, unix_next_socket() is overloaded depending on the 2nd argument. If it is NULL, unix_next_socket() returns the first socket in the hash. If not NULL, it returns the next socket in the same hash list or the first socket in the next non-empty hash list. This patch refactors unix_next_socket() into two functions unix_get_first() and unix_get_next(). unix_get_first() newly acquires a lock and returns the first socket in the list. unix_get_next() returns the next socket in a list or releases a lock and falls back to unix_get_first(). In the following patch, bpf iter holds entire sockets in a list and always releases the lock before .show(). It always calls unix_get_first() to acquire a lock in each iteration. So, this patch makes the change easier to follow. Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Link: https://lore.kernel.org/r/20220113002849.4384-2-kuniyu@amazon.co.jp Signed-off-by: Alexei Starovoitov <ast@kernel.org>
* | af_unix: annote lockless accesses to unix_tot_inflight & gc_in_progressEric Dumazet2022-01-142-5/+15
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | wait_for_unix_gc() reads unix_tot_inflight & gc_in_progress without synchronization. Adds READ_ONCE()/WRITE_ONCE() and their associated comments to better document the intent. BUG: KCSAN: data-race in unix_inflight / wait_for_unix_gc write to 0xffffffff86e2b7c0 of 4 bytes by task 9380 on cpu 0: unix_inflight+0x1e8/0x260 net/unix/scm.c:63 unix_attach_fds+0x10c/0x1e0 net/unix/scm.c:121 unix_scm_to_skb net/unix/af_unix.c:1674 [inline] unix_dgram_sendmsg+0x679/0x16b0 net/unix/af_unix.c:1817 unix_seqpacket_sendmsg+0xcc/0x110 net/unix/af_unix.c:2258 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] ____sys_sendmsg+0x39a/0x510 net/socket.c:2409 ___sys_sendmsg net/socket.c:2463 [inline] __sys_sendmmsg+0x267/0x4c0 net/socket.c:2549 __do_sys_sendmmsg net/socket.c:2578 [inline] __se_sys_sendmmsg net/socket.c:2575 [inline] __x64_sys_sendmmsg+0x53/0x60 net/socket.c:2575 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffffffff86e2b7c0 of 4 bytes by task 9375 on cpu 1: wait_for_unix_gc+0x24/0x160 net/unix/garbage.c:196 unix_dgram_sendmsg+0x8e/0x16b0 net/unix/af_unix.c:1772 unix_seqpacket_sendmsg+0xcc/0x110 net/unix/af_unix.c:2258 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] ____sys_sendmsg+0x39a/0x510 net/socket.c:2409 ___sys_sendmsg net/socket.c:2463 [inline] __sys_sendmmsg+0x267/0x4c0 net/socket.c:2549 __do_sys_sendmmsg net/socket.c:2578 [inline] __se_sys_sendmmsg net/socket.c:2575 [inline] __x64_sys_sendmmsg+0x53/0x60 net/socket.c:2575 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x00000002 -> 0x00000004 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 9375 Comm: syz-executor.1 Not tainted 5.16.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Fixes: 9915672d4127 ("af_unix: limit unix_tot_inflight") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: syzbot <syzkaller@googlegroups.com> Link: https://lore.kernel.org/r/20220114164328.2038499-1-eric.dumazet@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextDavid S. Miller2021-12-311-0/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Alexei Starovoitov says: ==================== pull-request: bpf-next 2021-12-30 The following pull-request contains BPF updates for your *net-next* tree. We've added 72 non-merge commits during the last 20 day(s) which contain a total of 223 files changed, 3510 insertions(+), 1591 deletions(-). The main changes are: 1) Automatic setrlimit in libbpf when bpf is memcg's in the kernel, from Andrii. 2) Beautify and de-verbose verifier logs, from Christy. 3) Composable verifier types, from Hao. 4) bpf_strncmp helper, from Hou. 5) bpf.h header dependency cleanup, from Jakub. 6) get_func_[arg|ret|arg_cnt] helpers, from Jiri. 7) Sleepable local storage, from KP. 8) Extend kfunc with PTR_TO_CTX, PTR_TO_MEM argument support, from Kumar. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| * net: Don't include filter.h from net/sock.hJakub Kicinski2021-12-291-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | sock.h is pretty heavily used (5k objects rebuilt on x86 after it's touched). We can drop the include of filter.h from it and add a forward declaration of struct sk_filter instead. This decreases the number of rebuilt objects when bpf.h is touched from ~5k to ~1k. There's a lot of missing includes this was masking. Primarily in networking tho, this time. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Marc Kleine-Budde <mkl@pengutronix.de> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Acked-by: Nikolay Aleksandrov <nikolay@nvidia.com> Acked-by: Stefano Garzarella <sgarzare@redhat.com> Link: https://lore.kernel.org/bpf/20211229004913.513372-1-kuba@kernel.org
* | net: Enable max_dgram_qlen unix sysctl to be configurable by non-init user ↵Joanne Koong2021-12-131-4/+0
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | namespaces This patch enables the "/proc/sys/net/unix/max_dgram_qlen" sysctl to be exposed to non-init user namespaces. max_dgram_qlen is used as the default "sk_max_ack_backlog" value for when a unix socket is created. Currently, when a networking namespace is initialized, its unix sysctls are exposed only if the user namespace that "owns" it is the init user namespace. If there is an non-init user namespace that "owns" a networking namespace (for example, in the case after we call clone() with both CLONE_NEWUSER and CLONE_NEWNET set), the sysctls are hidden from view and not configurable. Exposing the unix sysctl is safe because any changes made to it will be limited in scope to the networking namespace the non-init user namespace "owns" and has privileges over (changes won't affect any other net namespace). There is also no possibility of a non-privileged user namespace messing up the net namespace sysctls it shares with its parent user namespace. When a new user namespace is created without unsharing the network namespace (eg calling clone() with CLONE_NEWUSER), the new user namespace shares its parent's network namespace. Write access is protected by the mode set in the sysctl's ctl_table (and enforced by procfs). Here in the case of "max_dgram_qlen", 0644 is set; only the user owner has write access. v1 -> v2: * Add more detail to commit message, specify the "/proc/sys/net/unix/max_dgram_qlen" sysctl in commit message. Signed-off-by: Joanne Koong <joannekoong@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* af_unix: Relax race in unix_autobind().Kuniyuki Iwashima2021-11-261-10/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we bind an AF_UNIX socket without a name specified, the kernel selects an available one from 0x00000 to 0xFFFFF. unix_autobind() starts searching from a number in the 'static' variable and increments it after acquiring two locks. If multiple processes try autobind, they obtain the same lock and check if a socket in the hash list has the same name. If not, one process uses it, and all except one end up retrying the _next_ number (actually not, it may be incremented by the other processes). The more we autobind sockets in parallel, the longer the latency gets. We can avoid such a race by searching for a name from a random number. These show latency in unix_autobind() while 64 CPUs are simultaneously autobind-ing 1024 sockets for each. Without this patch: usec : count distribution 0 : 1176 |*** | 2 : 3655 |*********** | 4 : 4094 |************* | 6 : 3831 |************ | 8 : 3829 |************ | 10 : 3844 |************ | 12 : 3638 |*********** | 14 : 2992 |********* | 16 : 2485 |******* | 18 : 2230 |******* | 20 : 2095 |****** | 22 : 1853 |***** | 24 : 1827 |***** | 26 : 1677 |***** | 28 : 1473 |**** | 30 : 1573 |***** | 32 : 1417 |**** | 34 : 1385 |**** | 36 : 1345 |**** | 38 : 1344 |**** | 40 : 1200 |*** | With this patch: usec : count distribution 0 : 1855 |****** | 2 : 6464 |********************* | 4 : 9936 |******************************** | 6 : 12107 |****************************************| 8 : 10441 |********************************** | 10 : 7264 |*********************** | 12 : 4254 |************** | 14 : 2538 |******** | 16 : 1596 |***** | 18 : 1088 |*** | 20 : 800 |** | 22 : 670 |** | 24 : 601 |* | 26 : 562 |* | 28 : 525 |* | 30 : 446 |* | 32 : 378 |* | 34 : 337 |* | 36 : 317 |* | 38 : 314 |* | 40 : 298 | | Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* af_unix: Replace the big lock with small locks.Kuniyuki Iwashima2021-11-262-48/+70
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The hash table of AF_UNIX sockets is protected by the single lock. This patch replaces it with per-hash locks. The effect is noticeable when we handle multiple sockets simultaneously. Here is a test result on an EC2 c5.24xlarge instance. It shows latency (under 10us only) in unix_insert_unbound_socket() while 64 CPUs creating 1024 sockets for each in parallel. Without this patch: nsec : count distribution 0 : 179 | | 500 : 3021 |********* | 1000 : 6271 |******************* | 1500 : 6318 |******************* | 2000 : 5828 |***************** | 2500 : 5124 |*************** | 3000 : 4426 |************* | 3500 : 3672 |*********** | 4000 : 3138 |********* | 4500 : 2811 |******** | 5000 : 2384 |******* | 5500 : 2023 |****** | 6000 : 1954 |***** | 6500 : 1737 |***** | 7000 : 1749 |***** | 7500 : 1520 |**** | 8000 : 1469 |**** | 8500 : 1394 |**** | 9000 : 1232 |*** | 9500 : 1138 |*** | 10000 : 994 |*** | With this patch: nsec : count distribution 0 : 1634 |**** | 500 : 13170 |****************************************| 1000 : 13156 |*************************************** | 1500 : 9010 |*************************** | 2000 : 6363 |******************* | 2500 : 4443 |************* | 3000 : 3240 |********* | 3500 : 2549 |******* | 4000 : 1872 |***** | 4500 : 1504 |**** | 5000 : 1247 |*** | 5500 : 1035 |*** | 6000 : 889 |** | 6500 : 744 |** | 7000 : 634 |* | 7500 : 498 |* | 8000 : 433 |* | 8500 : 355 |* | 9000 : 336 |* | 9500 : 284 | | 10000 : 243 | | Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* af_unix: Save hash in sk_hash.Kuniyuki Iwashima2021-11-261-19/+23
| | | | | | | | | | | | | | | | | | | | | | | To replace unix_table_lock with per-hash locks in the next patch, we need to save a hash in each socket because /proc/net/unix or BPF prog iterate sockets while holding a hash table lock and release it later in a different function. Currently, we store a real/pseudo hash in struct unix_address. However, we do not allocate it to unbound sockets, nor should we do just for that. For this purpose, we can use sk_hash. Then, we no longer use the hash field in struct unix_address and can remove it. Also, this patch does - rename unix_insert_socket() to unix_insert_unbound_socket() - remove the redundant list argument from __unix_insert_socket() and unix_insert_unbound_socket() - use 'unsigned int' instead of 'unsigned' in __unix_set_addr_hash() - remove 'inline' from unix_remove_socket() and unix_insert_unbound_socket(). Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* af_unix: Add helpers to calculate hashes.Kuniyuki Iwashima2021-11-261-29/+35
| | | | | | | | This patch adds three helper functions that calculate hashes for unbound sockets and bound sockets with BSD/abstract addresses. Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* af_unix: Remove UNIX_ABSTRACT() macro and test sun_path[0] instead.Kuniyuki Iwashima2021-11-261-4/+2
| | | | | | | | | | | | | | | | | In BSD and abstract address cases, we store sockets in the hash table with keys between 0 and UNIX_HASH_SIZE - 1. However, the hash saved in a socket varies depending on its address type; sockets with BSD addresses always have UNIX_HASH_SIZE in their unix_sk(sk)->addr->hash. This is just for the UNIX_ABSTRACT() macro used to check the address type. The difference of the saved hashes comes from the first byte of the address in the first place. So, we can test it directly. Then we can keep a real hash in each socket and replace unix_table_lock with per-hash locks in the later patch. Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* af_unix: Allocate unix_address in unix_bind_(bsd|abstract)().Kuniyuki Iwashima2021-11-261-40/+67
| | | | | | | | | | | | To terminate address with '\0' in unix_bind_bsd(), we add unix_create_addr() and call it in unix_bind_bsd() and unix_bind_abstract(). Also, unix_bind_abstract() does not return -EEXIST. Only kern_path_create() and vfs_mknod() in unix_bind_bsd() can return it, so we move the last error check in unix_bind() to unix_bind_bsd(). Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* af_unix: Remove unix_mkname().Kuniyuki Iwashima2021-11-261-23/+11
| | | | | | | | | This patch removes unix_mkname() and postpones calculating a hash to unix_bind_abstract(). Some BSD stuffs still remain in unix_bind() though, the next patch packs them into unix_bind_bsd(). Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* af_unix: Copy unix_mkname() into unix_find_(bsd|abstract)().Kuniyuki Iwashima2021-11-261-38/+25
| | | | | | | | | | | We should not call unix_mkname() before unix_find_other() and instead do the same thing where necessary based on the address type: - terminating the address with '\0' in unix_find_bsd() - calculating the hash in unix_find_abstract(). Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* af_unix: Cut unix_validate_addr() out of unix_mkname().Kuniyuki Iwashima2021-11-261-10/+30
| | | | | | | | | | | | | | | | | | unix_mkname() tests socket address length and family and does some processing based on the address type. It is called in the early stage, and therefore some instructions are redundant and can end up in vain. The address length/family tests are done twice in unix_bind(). Also, the address type is rechecked later in unix_bind() and unix_find_other(), where we can do the same processing. Moreover, in the BSD address case, the hash is set to 0 but never used and confusing. This patch moves the address tests out of unix_mkname(), and the following patches move the other part into appropriate places and remove unix_mkname() finally. Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* af_unix: Return an error as a pointer in unix_find_other().Kuniyuki Iwashima2021-11-261-18/+22
| | | | | | | | We can return an error as a pointer and need not pass an additional argument to unix_find_other(). Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* af_unix: Factorise unix_find_other() based on address types.Kuniyuki Iwashima2021-11-261-55/+81
| | | | | | | | | As done in the commit fa42d910a38e ("unix_bind(): take BSD and abstract address cases into new helpers"), this patch moves BSD and abstract address cases from unix_find_other() into unix_find_bsd() and unix_find_abstract(). Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* af_unix: Pass struct sock to unix_autobind().Kuniyuki Iwashima2021-11-261-15/+21
| | | | | | | | | | | | | | | | | | | | We do not use struct socket in unix_autobind() and pass struct sock to unix_bind_bsd() and unix_bind_abstract(). Let's pass it to unix_autobind() as well. Also, this patch fixes these errors by checkpatch.pl. ERROR: do not use assignment in if condition #1795: FILE: net/unix/af_unix.c:1795: + if (test_bit(SOCK_PASSCRED, &sock->flags) && !u->addr CHECK: Logical continuations should be on the previous line #1796: FILE: net/unix/af_unix.c:1796: + if (test_bit(SOCK_PASSCRED, &sock->flags) && !u->addr + && (err = unix_autobind(sock)) != 0) Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* af_unix: Use offsetof() instead of sizeof().Kuniyuki Iwashima2021-11-262-8/+14
| | | | | | | | | | | | | | | | The length of the AF_UNIX socket address contains an offset to the member sun_path of struct sockaddr_un. Currently, the preceding member is just sun_family, and its type is sa_family_t and resolved to short. Therefore, the offset is represented by sizeof(short). However, it is not clear and fragile to changes in struct sockaddr_storage or sockaddr_un. This commit makes it clear and robust by rewriting sizeof() with offsetof(). Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski2021-11-261-3/+0
|\ | | | | | | | | | | | | | | | | | | drivers/net/ipa/ipa_main.c 8afc7e471ad3 ("net: ipa: separate disabling setup from modem stop") 76b5fbcd6b47 ("net: ipa: kill ipa_modem_init()") Duplicated include, drop one. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| * af_unix: fix regression in read after shutdownVincent Whitchurch2021-11-201-3/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On kernels before v5.15, calling read() on a unix socket after shutdown(SHUT_RD) or shutdown(SHUT_RDWR) would return the data previously written or EOF. But now, while read() after shutdown(SHUT_RD) still behaves the same way, read() after shutdown(SHUT_RDWR) always fails with -EINVAL. This behaviour change was apparently inadvertently introduced as part of a bug fix for a different regression caused by the commit adding sockmap support to af_unix, commit 94531cfcbe79c359 ("af_unix: Add unix_stream_proto for sockmap"). Those commits, for unclear reasons, started setting the socket state to TCP_CLOSE on shutdown(SHUT_RDWR), while this state change had previously only been done in unix_release_sock(). Restore the original behaviour. The sockmap tests in tests/selftests/bpf continue to pass after this patch. Fixes: d0c6416bd7091647f60 ("unix: Fix an issue in unix_shutdown causing the other end read/write failures") Link: https://lore.kernel.org/lkml/20211111140000.GA10779@axis.com/ Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com> Tested-by: Casey Schaufler <casey@schaufler-ca.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: drop nopreempt requirement on sock_prot_inuse_add()Eric Dumazet2021-11-161-4/+0
|/ | | | | | | | | | This is distracting really, let's make this simpler, because many callers had to take care of this by themselves, even if on x86 this adds more code than really needed. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: Implement ->sock_is_readable() for UDP and AF_UNIXCong Wang2021-10-262-0/+6
| | | | | | | | | | | | | | Yucong noticed we can't poll() sockets in sockmap even when they are the destination sockets of redirections. This is because we never poll any psock queues in ->poll(), except for TCP. With ->sock_is_readable() now we can overwrite >sock_is_readable(), invoke and implement it for both UDP and AF_UNIX sockets. Reported-by: Yucong Sun <sunyucong@gmail.com> Signed-off-by: Cong Wang <cong.wang@bytedance.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20211008203306.37525-4-xiyou.wangcong@gmail.com
* af_unix: Rename UNIX-DGRAM to UNIX to maintain backwards compatabilityStephen Boyd2021-10-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | Then name of this protocol changed in commit 94531cfcbe79 ("af_unix: Add unix_stream_proto for sockmap") because that commit added stream support to the af_unix protocol. Renaming the existing protocol makes a ChromeOS protocol test[1] fail now that the name has changed in /proc/net/protocols from "UNIX" to "UNIX-DGRAM". Let's put the name back to how it was while keeping the stream protocol as "UNIX-STREAM" so that the procfs interface doesn't change. This fixes the test and maintains backwards compatibility in proc. Cc: Jiang Wang <jiang.wang@bytedance.com> Cc: Andrii Nakryiko <andrii@kernel.org> Cc: Cong Wang <cong.wang@bytedance.com> Cc: Jakub Sitnicki <jakub@cloudflare.com> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Dmitry Osipenko <digetx@gmail.com> Link: https://source.chromium.org/chromiumos/chromiumos/codesearch/+/main:src/platform/tast-tests/src/chromiumos/tast/local/bundles/cros/network/supported_protocols.go;l=50;drc=e8b1c3f94cb40a054f4aa1ef1aff61e75dc38f18 [1] Fixes: 94531cfcbe79 ("af_unix: Add unix_stream_proto for sockmap") Signed-off-by: Stephen Boyd <swboyd@chromium.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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