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2021-01-20Merge tag 'net-5.11-rc5' of ↵Linus Torvalds1-5/+0
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net Pull networking fixes from Jakub Kicinski: "Networking fixes for 5.11-rc5, including fixes from bpf, wireless, and can trees. Current release - regressions: - nfc: nci: fix the wrong NCI_CORE_INIT parameters Current release - new code bugs: - bpf: allow empty module BTFs Previous releases - regressions: - bpf: fix signed_{sub,add32}_overflows type handling - tcp: do not mess with cloned skbs in tcp_add_backlog() - bpf: prevent double bpf_prog_put call from bpf_tracing_prog_attach - bpf: don't leak memory in bpf getsockopt when optlen == 0 - tcp: fix potential use-after-free due to double kfree() - mac80211: fix encryption issues with WEP - devlink: use right genl user_ptr when handling port param get/set - ipv6: set multicast flag on the multicast route - tcp: fix TCP_USER_TIMEOUT with zero window Previous releases - always broken: - bpf: local storage helpers should check nullness of owner ptr passed - mac80211: fix incorrect strlen of .write in debugfs - cls_flower: call nla_ok() before nla_next() - skbuff: back tiny skbs with kmalloc() in __netdev_alloc_skb() too" * tag 'net-5.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (52 commits) net: systemport: free dev before on error path net: usb: cdc_ncm: don't spew notifications net: mscc: ocelot: Fix multicast to the CPU port tcp: Fix potential use-after-free due to double kfree() bpf: Fix signed_{sub,add32}_overflows type handling can: peak_usb: fix use after free bugs can: vxcan: vxcan_xmit: fix use after free bug can: dev: can_restart: fix use after free bug tcp: fix TCP socket rehash stats mis-accounting net: dsa: b53: fix an off by one in checking "vlan->vid" tcp: do not mess with cloned skbs in tcp_add_backlog() selftests: net: fib_tests: remove duplicate log test net: nfc: nci: fix the wrong NCI_CORE_INIT parameters sh_eth: Fix power down vs. is_opened flag ordering net: Disable NETIF_F_HW_TLS_RX when RXCSUM is disabled netfilter: rpfilter: mask ecn bits before fib lookup udp: mask TOS bits in udp_v4_early_demux() xsk: Clear pool even for inactive queues bpf: Fix helper bpf_map_peek_elem_proto pointing to wrong callback sh_eth: Make PHY access aware of Runtime PM to fix reboot crash ...
2021-01-15libperf tests: Fail when failing to get a tracepoint idIan Rogers1-0/+1
Permissions are necessary to get a tracepoint id. Fail the test when the read fails. Signed-off-by: Ian Rogers <irogers@google.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lore.kernel.org/lkml/20210114180250.3853825-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2021-01-15libperf tests: If a test fails return non-zeroIan Rogers4-4/+4
If a test fails return -1 rather than 0. This is consistent with the return value in test-cpumap.c Signed-off-by: Ian Rogers <irogers@google.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lore.kernel.org/lkml/20210114180250.3853825-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2021-01-15libperf tests: Avoid uninitialized variable warningIan Rogers1-2/+2
The variable 'bf' is read (for a write call) without being initialized triggering a memory sanitizer warning. Use 'bf' in the read and switch the write to reading from a string. Signed-off-by: Ian Rogers <irogers@google.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lore.kernel.org/lkml/20210114212304.4018119-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2021-01-12libbpf: Allow loading empty BTFsAndrii Nakryiko1-5/+0
Empty BTFs do come up (e.g., simple kernel modules with no new types and strings, compared to the vmlinux BTF) and there is nothing technically wrong with them. So remove unnecessary check preventing loading empty BTFs. Fixes: d8123624506c ("libbpf: Fix BTF data layout checks and allow empty BTF") Reported-by: Christopher William Snowhill <chris@kode54.net> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210110070341.1380086-2-andrii@kernel.org
2020-12-17Merge remote-tracking branch 'torvalds/master' into perf/coreArnaldo Carvalho de Melo11-554/+1197
To pick up fixes and check what UAPI headers need to be synched. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2020-12-15Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextJakub Kicinski4-24/+48
Daniel Borkmann says: ==================== pull-request: bpf-next 2020-12-14 1) Expose bpf_sk_storage_*() helpers to iterator programs, from Florent Revest. 2) Add AF_XDP selftests based on veth devs to BPF selftests, from Weqaar Janjua. 3) Support for finding BTF based kernel attach targets through libbpf's bpf_program__set_attach_target() API, from Andrii Nakryiko. 4) Permit pointers on stack for helper calls in the verifier, from Yonghong Song. 5) Fix overflows in hash map elem size after rlimit removal, from Eric Dumazet. 6) Get rid of direct invocation of llc in BPF selftests, from Andrew Delgadillo. 7) Fix xsk_recvmsg() to reorder socket state check before access, from Björn Töpel. 8) Add new libbpf API helper to retrieve ring buffer epoll fd, from Brendan Jackman. 9) Batch of minor BPF selftest improvements all over the place, from Florian Lehner, KP Singh, Jiri Olsa and various others. * https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (31 commits) selftests/bpf: Add a test for ptr_to_map_value on stack for helper access bpf: Permits pointers on stack for helper calls libbpf: Expose libbpf ring_buffer epoll_fd selftests/bpf: Add set_attach_target() API selftest for module target libbpf: Support modules in bpf_program__set_attach_target() API selftests/bpf: Silence ima_setup.sh when not running in verbose mode. selftests/bpf: Drop the need for LLVM's llc selftests/bpf: fix bpf_testmod.ko recompilation logic samples/bpf: Fix possible hang in xdpsock with multiple threads selftests/bpf: Make selftest compilation work on clang 11 selftests/bpf: Xsk selftests - adding xdpxceiver to .gitignore selftests/bpf: Drop tcp-{client,server}.py from Makefile selftests/bpf: Xsk selftests - Bi-directional Sockets - SKB, DRV selftests/bpf: Xsk selftests - Socket Teardown - SKB, DRV selftests/bpf: Xsk selftests - DRV POLL, NOPOLL selftests/bpf: Xsk selftests - SKB POLL, NOPOLL selftests/bpf: Xsk selftests framework bpf: Only provide bpf_sock_from_file with CONFIG_NET bpf: Return -ENOTSUPP when attaching to non-kernel BTF xsk: Validate socket state in xsk_recvmsg, prior touching socket members ... ==================== Link: https://lore.kernel.org/r/20201214214316.20642-1-daniel@iogearbox.net Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-12-14libbpf: Expose libbpf ring_buffer epoll_fdBrendan Jackman3-0/+8
This provides a convenient perf ringbuf -> libbpf ringbuf migration path for users of external polling systems. It is analogous to perf_buffer__epoll_fd. Signed-off-by: Brendan Jackman <jackmanb@google.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20201214113812.305274-1-jackmanb@google.com
2020-12-14libbpf: Support modules in bpf_program__set_attach_target() APIAndrii Nakryiko1-24/+40
Support finding kernel targets in kernel modules when using bpf_program__set_attach_target() API. This brings it up to par with what libbpf supports when doing declarative SEC()-based target determination. Some minor internal refactoring was needed to make sure vmlinux BTF can be loaded before bpf_object's load phase. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20201211215825.3646154-2-andrii@kernel.org
2020-12-12Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski1-1/+1
xdp_return_frame_bulk() needs to pass a xdp_buff to __xdp_return(). strlcpy got converted to strscpy but here it makes no functional difference, so just keep the right code. Conflicts: net/netfilter/nf_tables_api.c Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-12-04Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextJakub Kicinski8-195/+659
Alexei Starovoitov says: ==================== pull-request: bpf-next 2020-12-03 The main changes are: 1) Support BTF in kernel modules, from Andrii. 2) Introduce preferred busy-polling, from Björn. 3) bpf_ima_inode_hash() and bpf_bprm_opts_set() helpers, from KP Singh. 4) Memcg-based memory accounting for bpf objects, from Roman. 5) Allow bpf_{s,g}etsockopt from cgroup bind{4,6} hooks, from Stanislav. * https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (118 commits) selftests/bpf: Fix invalid use of strncat in test_sockmap libbpf: Use memcpy instead of strncpy to please GCC selftests/bpf: Add fentry/fexit/fmod_ret selftest for kernel module selftests/bpf: Add tp_btf CO-RE reloc test for modules libbpf: Support attachment of BPF tracing programs to kernel modules libbpf: Factor out low-level BPF program loading helper bpf: Allow to specify kernel module BTFs when attaching BPF programs bpf: Remove hard-coded btf_vmlinux assumption from BPF verifier selftests/bpf: Add CO-RE relocs selftest relying on kernel module BTF selftests/bpf: Add support for marking sub-tests as skipped selftests/bpf: Add bpf_testmod kernel module for testing libbpf: Add kernel module BTF support for CO-RE relocations libbpf: Refactor CO-RE relocs to not assume a single BTF object libbpf: Add internal helper to load BTF data by FD bpf: Keep module's btf_data_size intact after load bpf: Fix bpf_put_raw_tracepoint()'s use of __module_address() selftests/bpf: Add Userspace tests for TCP_WINDOW_CLAMP bpf: Adds support for setting window clamp samples/bpf: Fix spelling mistake "recieving" -> "receiving" bpf: Fix cold build of test_progs-no_alu32 ... ==================== Link: https://lore.kernel.org/r/20201204021936.85653-1-alexei.starovoitov@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-12-04libbpf: Use memcpy instead of strncpy to please GCCAndrii Nakryiko1-1/+1
Some versions of GCC are really nit-picky about strncpy() use. Use memcpy(), as they are pretty much equivalent for the case of fixed length strings. Fixes: e459f49b4394 ("libbpf: Separate XDP program load with xsk socket creation") Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20201203235440.2302137-1-andrii@kernel.org
2020-12-04libbpf: Support attachment of BPF tracing programs to kernel modulesAndrii Nakryiko3-32/+112
Teach libbpf to search for BTF types in kernel modules for tracing BPF programs. This allows attachment of raw_tp/fentry/fexit/fmod_ret/etc BPF program types to tracepoints and functions in kernel modules. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20201203204634.1325171-13-andrii@kernel.org
2020-12-04libbpf: Factor out low-level BPF program loading helperAndrii Nakryiko3-50/+113
Refactor low-level API for BPF program loading to not rely on public API types. This allows painless extension without constant efforts to cleverly not break backwards compatibility. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20201203204634.1325171-12-andrii@kernel.org
2020-12-04libbpf: Add kernel module BTF support for CO-RE relocationsAndrii Nakryiko1-10/+169
Teach libbpf to search for candidate types for CO-RE relocations across kernel modules BTFs, in addition to vmlinux BTF. If at least one candidate type is found in vmlinux BTF, kernel module BTFs are not iterated. If vmlinux BTF has no matching candidates, then find all kernel module BTFs and search for all matching candidates across all of them. Kernel's support for module BTFs are inferred from the support for BTF name pointer in BPF UAPI. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20201203204634.1325171-6-andrii@kernel.org
2020-12-04libbpf: Refactor CO-RE relocs to not assume a single BTF objectAndrii Nakryiko1-76/+111
Refactor CO-RE relocation candidate search to not expect a single BTF, rather return all candidate types with their corresponding BTF objects. This will allow to extend CO-RE relocations to accommodate kernel module BTFs. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20201203204634.1325171-5-andrii@kernel.org
2020-12-04libbpf: Add internal helper to load BTF data by FDAndrii Nakryiko2-26/+36
Add a btf_get_from_fd() helper, which constructs struct btf from in-kernel BTF data by FD. This is used for loading module BTFs. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20201203204634.1325171-4-andrii@kernel.org
2020-12-03libbpf: Cap retries in sys_bpf_prog_loadStanislav Fomichev1-1/+2
I've seen a situation, where a process that's under pprof constantly generates SIGPROF which prevents program loading indefinitely. The right thing to do probably is to disable signals in the upper layers while loading, but it still would be nice to get some error from libbpf instead of an endless loop. Let's add some small retry limit to the program loading: try loading the program 5 (arbitrary) times and give up. v2: * 10 -> 5 retires (Andrii Nakryiko) Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20201202231332.3923644-1-sdf@google.com
2020-12-03libbpf: Sanitise map names before pinningToke Høiland-Jørgensen1-0/+12
When we added sanitising of map names before loading programs to libbpf, we still allowed periods in the name. While the kernel will accept these for the map names themselves, they are not allowed in file names when pinning maps. This means that bpf_object__pin_maps() will fail if called on an object that contains internal maps (such as sections .rodata). Fix this by replacing periods with underscores when constructing map pin paths. This only affects the paths generated by libbpf when bpf_object__pin_maps() is called with a path argument. Any pin paths set by bpf_map__set_pin_path() are unaffected, and it will still be up to the caller to avoid invalid characters in those. Fixes: 113e6b7e15e2 ("libbpf: Sanitise internal map names so they are not rejected by the kernel") Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20201203093306.107676-1-toke@redhat.com
2020-12-03libbpf: Fail early when loading programs with unspecified typeAndrei Matei1-1/+14
Before this patch, a program with unspecified type (BPF_PROG_TYPE_UNSPEC) would be passed to the BPF syscall, only to have the kernel reject it with an opaque invalid argument error. This patch makes libbpf reject such programs with a nicer error message - in particular libbpf now tries to diagnose bad ELF section names at both open time and load time. Signed-off-by: Andrei Matei <andreimatei1@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20201203043410.59699-1-andreimatei1@gmail.com
2020-12-03libbpf: Separate XDP program load with xsk socket creationMariusz Dudek3-9/+90
Add support for separation of eBPF program load and xsk socket creation. This is needed for use-case when you want to privide as little privileges as possible to the data plane application that will handle xsk socket creation and incoming traffic. With this patch the data entity container can be run with only CAP_NET_RAW capability to fulfill its purpose of creating xsk socket and handling packages. In case your umem is larger or equal process limit for MEMLOCK you need either increase the limit or CAP_IPC_LOCK capability. To resolve privileges issue two APIs are introduced: - xsk_setup_xdp_prog - loads the built in XDP program. It can also return xsks_map_fd which is needed by unprivileged process to update xsks_map with AF_XDP socket "fd" - xsk_socket__update_xskmap - inserts an AF_XDP socket into an xskmap for a particular xsk_socket Signed-off-by: Mariusz Dudek <mariuszx.dudek@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Magnus Karlsson <magnus.karlsson@intel.com> Link: https://lore.kernel.org/bpf/20201203090546.11976-2-mariuszx.dudek@intel.com
2020-12-03libbpf: Add base BTF accessorAndrii Nakryiko3-0/+7
Add ability to get base BTF. It can be also used to check if BTF is split BTF. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20201202065244.530571-3-andrii@kernel.org
2020-12-02libbpf: Fix ring_buffer__poll() to return number of consumed samplesAndrii Nakryiko1-1/+1
Fix ring_buffer__poll() to return the number of non-discarded records consumed, just like its documentation states. It's also consistent with ring_buffer__consume() return. Fix up selftests with wrong expected results. Fixes: bf99c936f947 ("libbpf: Add BPF ring buffer support") Fixes: cb1c9ddd5525 ("selftests/bpf: Add BPF ringbuf selftests") Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20201130223336.904192-1-andrii@kernel.org
2020-11-30Merge remote-tracking branch 'torvalds/master' into perf/coreArnaldo Carvalho de Melo4-19/+30
To pick up fixes. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2020-11-27libbpf: Replace size_t with __u32 in xsk interfacesMagnus Karlsson1-9/+6
Replace size_t with __u32 in the xsk interfaces that contain this. There is no reason to have size_t since the internal variable that is manipulated is a __u32. The following APIs are affected: __u32 xsk_ring_prod__reserve(struct xsk_ring_prod *prod, __u32 nb, __u32 *idx) void xsk_ring_prod__submit(struct xsk_ring_prod *prod, __u32 nb) __u32 xsk_ring_cons__peek(struct xsk_ring_cons *cons, __u32 nb, __u32 *idx) void xsk_ring_cons__cancel(struct xsk_ring_cons *cons, __u32 nb) void xsk_ring_cons__release(struct xsk_ring_cons *cons, __u32 nb) The "nb" variable and the return values have been changed from size_t to __u32. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/1606383455-8243-1-git-send-email-magnus.karlsson@gmail.com
2020-11-27tools lib: Adopt memchr_inv() from kernelJiri Olsa1-0/+58
We'll use it to check for undefined/zero data. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Song Liu <songliubraving@fb.com> Cc: Stephane Eranian <eranian@google.com> Link: http://lore.kernel.org/lkml/20201126170026.2619053-6-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2020-11-25libbpf: Add support for canceling cached_cons advanceLi RongQing1-0/+6
Add a new function for returning descriptors the user received after an xsk_ring_cons__peek call. After the application has gotten a number of descriptors from a ring, it might not be able to or want to process them all for various reasons. Therefore, it would be useful to have an interface for returning or cancelling a number of them so that they are returned to the ring. This patch adds a new function called xsk_ring_cons__cancel that performs this operation on nb descriptors counted from the end of the batch of descriptors that was received through the peek call. Signed-off-by: Li RongQing <lirongqing@baidu.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> [ Magnus Karlsson: rewrote changelog ] Acked-by: Magnus Karlsson <magnus.karlsson@intel.com> Link: https://lore.kernel.org/bpf/1606202474-8119-1-git-send-email-lirongqing@baidu.com
2020-11-20Merge https://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski2-10/+15
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-19libbpf: Fix VERSIONED_SYM_COUNT number parsingJiri Olsa1-0/+2
We remove "other info" from "readelf -s --wide" output when parsing GLOBAL_SYM_COUNT variable, which was added in [1]. But we don't do that for VERSIONED_SYM_COUNT and it's failing the check_abi target on powerpc Fedora 33. The extra "other info" wasn't problem for VERSIONED_SYM_COUNT parsing until commit [2] added awk in the pipe, which assumes that the last column is symbol, but it can be "other info". Adding "other info" removal for VERSIONED_SYM_COUNT the same way as we did for GLOBAL_SYM_COUNT parsing. [1] aa915931ac3e ("libbpf: Fix readelf output parsing for Fedora") [2] 746f534a4809 ("tools/libbpf: Avoid counting local symbols in ABI check") Fixes: 746f534a4809 ("tools/libbpf: Avoid counting local symbols in ABI check") Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20201118211350.1493421-1-jolsa@kernel.org
2020-11-17libbpf: bpf__find_by_name[_kind] should use btf__get_nr_types()Alan Maguire1-4/+4
When operating on split BTF, btf__find_by_name[_kind] will not iterate over all types since they use btf->nr_types to show the number of types to iterate over. For split BTF this is the number of types _on top of base BTF_, so it will underestimate the number of types to iterate over, especially for vmlinux + module BTF, where the latter is much smaller. Use btf__get_nr_types() instead. Fixes: ba451366bf44 ("libbpf: Implement basic split BTF support") Signed-off-by: Alan Maguire <alan.maguire@oracle.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/1605437195-2175-1-git-send-email-alan.maguire@oracle.com
2020-11-14Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextJakub Kicinski4-335/+490
Daniel Borkmann says: ==================== pull-request: bpf-next 2020-11-14 1) Add BTF generation for kernel modules and extend BTF infra in kernel e.g. support for split BTF loading and validation, from Andrii Nakryiko. 2) Support for pointers beyond pkt_end to recognize LLVM generated patterns on inlined branch conditions, from Alexei Starovoitov. 3) Implements bpf_local_storage for task_struct for BPF LSM, from KP Singh. 4) Enable FENTRY/FEXIT/RAW_TP tracing program to use the bpf_sk_storage infra, from Martin KaFai Lau. 5) Add XDP bulk APIs that introduce a defer/flush mechanism to optimize the XDP_REDIRECT path, from Lorenzo Bianconi. 6) Fix a potential (although rather theoretical) deadlock of hashtab in NMI context, from Song Liu. 7) Fixes for cross and out-of-tree build of bpftool and runqslower allowing build for different target archs on same source tree, from Jean-Philippe Brucker. 8) Fix error path in htab_map_alloc() triggered from syzbot, from Eric Dumazet. 9) Move functionality from test_tcpbpf_user into the test_progs framework so it can run in BPF CI, from Alexander Duyck. 10) Lift hashtab key_size limit to be larger than MAX_BPF_STACK, from Florian Lehner. Note that for the fix from Song we have seen a sparse report on context imbalance which requires changes in sparse itself for proper annotation detection where this is currently being discussed on linux-sparse among developers [0]. Once we have more clarification/guidance after their fix, Song will follow-up. [0] https://lore.kernel.org/linux-sparse/CAHk-=wh4bx8A8dHnX612MsDO13st6uzAz1mJ1PaHHVevJx_ZCw@mail.gmail.com/T/ https://lore.kernel.org/linux-sparse/20201109221345.uklbp3lzgq6g42zb@ltop.local/T/ * git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (66 commits) net: mlx5: Add xdp tx return bulking support net: mvpp2: Add xdp tx return bulking support net: mvneta: Add xdp tx return bulking support net: page_pool: Add bulk support for ptr_ring net: xdp: Introduce bulking for xdp tx return path bpf: Expose bpf_d_path helper to sleepable LSM hooks bpf: Augment the set of sleepable LSM hooks bpf: selftest: Use bpf_sk_storage in FENTRY/FEXIT/RAW_TP bpf: Allow using bpf_sk_storage in FENTRY/FEXIT/RAW_TP bpf: Rename some functions in bpf_sk_storage bpf: Folding omem_charge() into sk_storage_charge() selftests/bpf: Add asm tests for pkt vs pkt_end comparison. selftests/bpf: Add skb_pkt_end test bpf: Support for pointers beyond pkt_end. tools/bpf: Always run the *-clean recipes tools/bpf: Add bootstrap/ to .gitignore bpf: Fix NULL dereference in bpf_task_storage tools/bpftool: Fix build slowdown tools/runqslower: Build bpftool using HOSTCC tools/runqslower: Enable out-of-tree build ... ==================== Link: https://lore.kernel.org/r/20201114020819.29584-1-daniel@iogearbox.net Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-10libbpf: Don't attempt to load unused subprog as an entry-point BPF programAndrii Nakryiko1-10/+13
If BPF code contains unused BPF subprogram and there are no other subprogram calls (which can realistically happen in real-world applications given sufficiently smart Clang code optimizations), libbpf will erroneously assume that subprograms are entry-point programs and will attempt to load them with UNSPEC program type. Fix by not relying on subcall instructions and rather detect it based on the structure of BPF object's sections. Fixes: 9a94f277c4fb ("tools: libbpf: restore the ability to load programs from .text section") Reported-by: Dmitrii Banshchikov <dbanschikov@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20201107000251.256821-1-andrii@kernel.org
2020-11-06libbpf: Add support for task local storageKP Singh1-0/+1
Updates the bpf_probe_map_type API to also support BPF_MAP_TYPE_TASK_STORAGE similar to other local storage maps. Signed-off-by: KP Singh <kpsingh@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20201106103747.2780972-4-kpsingh@chromium.org
2020-11-06libbpf: Accomodate DWARF/compiler bug with duplicated identical arraysAndrii Nakryiko1-2/+25
In some cases compiler seems to generate distinct DWARF types for identical arrays within the same CU. That seems like a bug, but it's already out there and breaks type graph equivalence checks, so accommodate it anyway by checking for identical arrays, regardless of their type ID. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20201105043402.2530976-10-andrii@kernel.org
2020-11-06libbpf: Support BTF dedup of split BTFsAndrii Nakryiko1-53/+168
Add support for deduplication split BTFs. When deduplicating split BTF, base BTF is considered to be immutable and can't be modified or adjusted. 99% of BTF deduplication logic is left intact (module some type numbering adjustments). There are only two differences. First, each type in base BTF gets hashed (expect VAR and DATASEC, of course, those are always considered to be self-canonical instances) and added into a table of canonical table candidates. Hashing is a shallow, fast operation, so mostly eliminates the overhead of having entire base BTF to be a part of BTF dedup. Second difference is very critical and subtle. While deduplicating split BTF types, it is possible to discover that one of immutable base BTF BTF_KIND_FWD types can and should be resolved to a full STRUCT/UNION type from the split BTF part. This is, obviously, can't happen because we can't modify the base BTF types anymore. So because of that, any type in split BTF that directly or indirectly references that newly-to-be-resolved FWD type can't be considered to be equivalent to the corresponding canonical types in base BTF, because that would result in a loss of type resolution information. So in such case, split BTF types will be deduplicated separately and will cause some duplication of type information, which is unavoidable. With those two changes, the rest of the algorithm manages to deduplicate split BTF correctly, pointing all the duplicates to their canonical counter-parts in base BTF, but also is deduplicating whatever unique types are present in split BTF on their own. Also, theoretically, split BTF after deduplication could end up with either empty type section or empty string section. This is handled by libbpf correctly in one of previous patches in the series. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20201105043402.2530976-9-andrii@kernel.org
2020-11-06libbpf: Fix BTF data layout checks and allow empty BTFAndrii Nakryiko1-10/+6
Make data section layout checks stricter, disallowing overlap of types and strings data. Additionally, allow BTFs with no type data. There is nothing inherently wrong with having BTF with no types (put potentially with some strings). This could be a situation with kernel module BTFs, if module doesn't introduce any new type information. Also fix invalid offset alignment check for btf->hdr->type_off. Fixes: 8a138aed4a80 ("bpf: btf: Add BTF support to libbpf") Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20201105043402.2530976-8-andrii@kernel.org
2020-11-06libbpf: Implement basic split BTF supportAndrii Nakryiko3-45/+169
Support split BTF operation, in which one BTF (base BTF) provides basic set of types and strings, while another one (split BTF) builds on top of base's types and strings and adds its own new types and strings. From API standpoint, the fact that the split BTF is built on top of the base BTF is transparent. Type numeration is transparent. If the base BTF had last type ID #N, then all types in the split BTF start at type ID N+1. Any type in split BTF can reference base BTF types, but not vice versa. Programmatically construction of a split BTF on top of a base BTF is supported: one can create an empty split BTF with btf__new_empty_split() and pass base BTF as an input, or pass raw binary data to btf__new_split(), or use btf__parse_xxx_split() variants to get initial set of split types/strings from the ELF file with .BTF section. String offsets are similarly transparent and are a logical continuation of base BTF's strings. When building BTF programmatically and adding a new string (explicitly with btf__add_str() or implicitly through appending new types/members), string-to-be-added would first be looked up from the base BTF's string section and re-used if it's there. If not, it will be looked up and/or added to the split BTF string section. Similarly to type IDs, types in split BTF can refer to strings from base BTF absolutely transparently (but not vice versa, of course, because base BTF doesn't "know" about existence of split BTF). Internal type index is slightly adjusted to be zero-indexed, ignoring a fake [0] VOID type. This allows to handle split/base BTF type lookups transparently by using btf->start_id type ID offset, which is always 1 for base/non-split BTF and equals btf__get_nr_types(base_btf) + 1 for the split BTF. BTF deduplication is not yet supported for split BTF and support for it will be added in separate patch. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20201105043402.2530976-5-andrii@kernel.org
2020-11-06libbpf: Unify and speed up BTF string deduplicationAndrii Nakryiko1-165/+98
Revamp BTF dedup's string deduplication to match the approach of writable BTF string management. This allows to transfer deduplicated strings index back to BTF object after deduplication without expensive extra memory copying and hash map re-construction. It also simplifies the code and speeds it up, because hashmap-based string deduplication is faster than sort + unique approach. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20201105043402.2530976-4-andrii@kernel.org
2020-11-06libbpf: Factor out common operations in BTF writing APIsAndrii Nakryiko1-80/+43
Factor out commiting of appended type data. Also extract fetching the very last type in the BTF (to append members to). These two operations are common across many APIs and will be easier to refactor with split BTF, if they are extracted into a single place. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20201105043402.2530976-2-andrii@kernel.org
2020-11-04libbpf: Fix possible use after free in xsk_socket__deleteMagnus Karlsson1-2/+4
Fix a possible use after free in xsk_socket__delete that will happen if xsk_put_ctx() frees the ctx. To fix, save the umem reference taken from the context and just use that instead. Fixes: 2f6324a3937f ("libbpf: Support shared umems between queues and devices") Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/1604396490-12129-3-git-send-email-magnus.karlsson@gmail.com
2020-11-04libbpf: Fix null dereference in xsk_socket__deleteMagnus Karlsson1-1/+2
Fix a possible null pointer dereference in xsk_socket__delete that will occur if a null pointer is fed into the function. Fixes: 2f6324a3937f ("libbpf: Support shared umems between queues and devices") Reported-by: Andrii Nakryiko <andrii.nakryiko@gmail.com> Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/1604396490-12129-2-git-send-email-magnus.karlsson@gmail.com
2020-11-03libbpf, hashmap: Fix undefined behavior in hash_bitsIan Rogers1-6/+9
If bits is 0, the case when the map is empty, then the >> is the size of the register which is undefined behavior - on x86 it is the same as a shift by 0. Fix by handling the 0 case explicitly and guarding calls to hash_bits for empty maps in hashmap__for_each_key_entry and hashmap__for_each_entry_safe. Fixes: e3b924224028 ("libbpf: add resizable non-thread safe internal hashmap") Suggested-by: Andrii Nakryiko <andriin@fb.com>, Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20201029223707.494059-1-irogers@google.com
2020-10-23Merge tag 'net-5.10-rc1' of ↵Linus Torvalds1-0/+2
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net Pull networking fixes from Jakub Kicinski: "Cross-tree/merge window issues: - rtl8150: don't incorrectly assign random MAC addresses; fix late in the 5.9 cycle started depending on a return code from a function which changed with the 5.10 PR from the usb subsystem Current release regressions: - Revert "virtio-net: ethtool configurable RXCSUM", it was causing crashes at probe when control vq was not negotiated/available Previous release regressions: - ixgbe: fix probing of multi-port 10 Gigabit Intel NICs with an MDIO bus, only first device would be probed correctly - nexthop: Fix performance regression in nexthop deletion by effectively switching from recently added synchronize_rcu() to synchronize_rcu_expedited() - netsec: ignore 'phy-mode' device property on ACPI systems; the property is not populated correctly by the firmware, but firmware configures the PHY so just keep boot settings Previous releases - always broken: - tcp: fix to update snd_wl1 in bulk receiver fast path, addressing bulk transfers getting "stuck" - icmp: randomize the global rate limiter to prevent attackers from getting useful signal - r8169: fix operation under forced interrupt threading, make the driver always use hard irqs, even on RT, given the handler is light and only wants to schedule napi (and do so through a _irqoff() variant, preferably) - bpf: Enforce pointer id generation for all may-be-null register type to avoid pointers erroneously getting marked as null-checked - tipc: re-configure queue limit for broadcast link - net/sched: act_tunnel_key: fix OOB write in case of IPv6 ERSPAN tunnels - fix various issues in chelsio inline tls driver Misc: - bpf: improve just-added bpf_redirect_neigh() helper api to support supplying nexthop by the caller - in case BPF program has already done a lookup we can avoid doing another one - remove unnecessary break statements - make MCTCP not select IPV6, but rather depend on it" * tag 'net-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (62 commits) tcp: fix to update snd_wl1 in bulk receiver fast path net: Properly typecast int values to set sk_max_pacing_rate netfilter: nf_fwd_netdev: clear timestamp in forwarding path ibmvnic: save changed mac address to adapter->mac_addr selftests: mptcp: depends on built-in IPv6 Revert "virtio-net: ethtool configurable RXCSUM" rtnetlink: fix data overflow in rtnl_calcit() net: ethernet: mtk-star-emac: select REGMAP_MMIO net: hdlc_raw_eth: Clear the IFF_TX_SKB_SHARING flag after calling ether_setup net: hdlc: In hdlc_rcv, check to make sure dev is an HDLC device bpf, libbpf: Guard bpf inline asm from bpf_tail_call_static bpf, selftests: Extend test_tc_redirect to use modified bpf_redirect_neigh() bpf: Fix bpf_redirect_neigh helper api to support supplying nexthop mptcp: depends on IPV6 but not as a module sfc: move initialisation of efx->filter_sem to efx_init_struct() mpls: load mpls_gso after mpls_iptunnel net/sched: act_tunnel_key: fix OOB write in case of IPv6 ERSPAN tunnels net/sched: act_gate: Unlock ->tcfa_lock in tc_setup_flow_action() net: dsa: bcm_sf2: make const array static, makes object smaller mptcp: MPTCP_IPV6 should depend on IPV6 instead of selecting it ...
2020-10-22bpf, libbpf: Guard bpf inline asm from bpf_tail_call_staticDaniel Borkmann1-0/+2
Yaniv reported a compilation error after pulling latest libbpf: [...] ../libbpf/src/root/usr/include/bpf/bpf_helpers.h:99:10: error: unknown register name 'r0' in asm : "r0", "r1", "r2", "r3", "r4", "r5"); [...] The issue got triggered given Yaniv was compiling tracing programs with native target (e.g. x86) instead of BPF target, hence no BTF generated vmlinux.h nor CO-RE used, and later llc with -march=bpf was invoked to compile from LLVM IR to BPF object file. Given that clang was expecting x86 inline asm and not BPF one the error complained that these regs don't exist on the former. Guard bpf_tail_call_static() with defined(__bpf__) where BPF inline asm is valid to use. BPF tracing programs on more modern kernels use BPF target anyway and thus the bpf_tail_call_static() function will be available for them. BPF inline asm is supported since clang 7 (clang <= 6 otherwise throws same above error), and __bpf_unreachable() since clang 8, therefore include the latter condition in order to prevent compilation errors for older clang versions. Given even an old Ubuntu 18.04 LTS has official LLVM packages all the way up to llvm-10, I did not bother to special case the __bpf_unreachable() inside bpf_tail_call_static() further. Also, undo the sockex3_kern's use of bpf_tail_call_static() sample given they still have the old hacky way to even compile networking progs with native instead of BPF target so bpf_tail_call_static() won't be defined there anymore. Fixes: 0e9f6841f664 ("bpf, libbpf: Add bpf_tail_call_static helper for bpf programs") Reported-by: Yaniv Agman <yanivagman@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Tested-by: Yaniv Agman <yanivagman@gmail.com> Link: https://lore.kernel.org/bpf/CAMy7=ZUk08w5Gc2Z-EKi4JFtuUCaZYmE4yzhJjrExXpYKR4L8w@mail.gmail.com Link: https://lore.kernel.org/bpf/20201021203257.26223-1-daniel@iogearbox.net
2020-10-17Merge tag 'perf-tools-for-v5.10-2020-10-15' of ↵Linus Torvalds8-108/+101
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux Pull perf tools updates from Arnaldo Carvalho de Melo: - cgroup improvements for 'perf stat', allowing for compact specification of events and cgroups in the command line. - Support per thread topdown metrics in 'perf stat'. - Support sample-read topdown metric group in 'perf record' - Show start of latency in addition to its start in 'perf sched latency'. - Add min, max to 'perf script' futex-contention output, in addition to avg. - Allow usage of 'perf_event_attr->exclusive' attribute via the new ':e' event modifier. - Add 'snapshot' command to 'perf record --control', using it with Intel PT. - Support FIFO file names as alternative options to 'perf record --control'. - Introduce branch history "streams", to compare 'perf record' runs with 'perf diff' based on branch records and report hot streams. - Support PE executable symbol tables using libbfd, to profile, for instance, wine binaries. - Add filter support for option 'perf ftrace -F/--funcs'. - Allow configuring the 'disassembler_style' 'perf annotate' knob via 'perf config' - Update CascadelakeX and SkylakeX JSON vendor events files. - Add support for parsing perchip/percore JSON vendor events. - Add power9 hv_24x7 core level metric events. - Add L2 prefetch, ITLB instruction fetch hits JSON events for AMD zen1. - Enable Family 19h users by matching Zen2 AMD vendor events. - Use debuginfod in 'perf probe' when required debug files not found locally. - Display negative tid in non-sample events in 'perf script'. - Make GTK2 support opt-in - Add build test with GTK+ - Add missing -lzstd to the fast path feature detection - Add scripts to auto generate 'mmap', 'mremap' string<->id tables for use in 'perf trace'. - Show python test script in verbose mode. - Fix uncore metric expressions - Msan uninitialized use fixes. - Use condition variables in 'perf bench numa' - Autodetect python3 binary in systems without python2. - Support md5 build ids in addition to sha1. - Add build id 'perf test' regression test. - Fix printable strings in python3 scripts. - Fix off by ones in 'perf trace' in arches using libaudit. - Fix JSON event code for events referencing std arch events. - Introduce 'perf test' shell script for Arm CoreSight testing. - Add rdtsc() for Arm64 for used in the PERF_RECORD_TIME_CONV metadata event and in 'perf test tsc'. - 'perf c2c' improvements: Add "RMT Load Hit" metric, "Total Stores", fixes and documentation update. - Fix usage of reloc_sym in 'perf probe' when using both kallsyms and debuginfo files. - Do not print 'Metric Groups:' unnecessarily in 'perf list' - Refcounting fixes in the event parsing code. - Add expand cgroup event 'perf test' entry. - Fix out of bounds CPU map access when handling armv8_pmu events in 'perf stat'. - Add build-id injection 'perf bench' benchmark. - Enter namespace when reading build-id in 'perf inject'. - Do not load map/dso when injecting build-id speeding up the 'perf inject' process. - Add --buildid-all option to avoid processing all samples, just the mmap metadata events. - Add feature test to check if libbfd has buildid support - Add 'perf test' entry for PE binary format support. - Fix typos in power8 PMU vendor events JSON files. - Hide libtraceevent non API functions. * tag 'perf-tools-for-v5.10-2020-10-15' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux: (113 commits) perf c2c: Update documentation for metrics reorganization perf c2c: Add metrics "RMT Load Hit" perf c2c: Correct LLC load hit metrics perf c2c: Change header for LLC local hit perf c2c: Use more explicit headers for HITM perf c2c: Change header from "LLC Load Hitm" to "Load Hitm" perf c2c: Organize metrics based on memory hierarchy perf c2c: Display "Total Stores" as a standalone metrics perf c2c: Display the total numbers continuously perf bench: Use condition variables in numa. perf jevents: Fix event code for events referencing std arch events perf diff: Support hot streams comparison perf streams: Report hot streams perf streams: Calculate the sum of total streams hits perf streams: Link stream pair perf streams: Compare two streams perf streams: Get the evsel_streams by evsel_idx perf streams: Introduce branch history "streams" perf intel-pt: Improve PT documentation slightly perf tools: Add support for exclusive groups/events ...
2020-10-16Merge tag 'net-next-5.10' of ↵Linus Torvalds23-1574/+4726
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: - Add redirect_neigh() BPF packet redirect helper, allowing to limit stack traversal in common container configs and improving TCP back-pressure. Daniel reports ~10Gbps => ~15Gbps single stream TCP performance gain. - Expand netlink policy support and improve policy export to user space. (Ge)netlink core performs request validation according to declared policies. Expand the expressiveness of those policies (min/max length and bitmasks). Allow dumping policies for particular commands. This is used for feature discovery by user space (instead of kernel version parsing or trial and error). - Support IGMPv3/MLDv2 multicast listener discovery protocols in bridge. - Allow more than 255 IPv4 multicast interfaces. - Add support for Type of Service (ToS) reflection in SYN/SYN-ACK packets of TCPv6. - In Multi-patch TCP (MPTCP) support concurrent transmission of data on multiple subflows in a load balancing scenario. Enhance advertising addresses via the RM_ADDR/ADD_ADDR options. - Support SMC-Dv2 version of SMC, which enables multi-subnet deployments. - Allow more calls to same peer in RxRPC. - Support two new Controller Area Network (CAN) protocols - CAN-FD and ISO 15765-2:2016. - Add xfrm/IPsec compat layer, solving the 32bit user space on 64bit kernel problem. - Add TC actions for implementing MPLS L2 VPNs. - Improve nexthop code - e.g. handle various corner cases when nexthop objects are removed from groups better, skip unnecessary notifications and make it easier to offload nexthops into HW by converting to a blocking notifier. - Support adding and consuming TCP header options by BPF programs, opening the doors for easy experimental and deployment-specific TCP option use. - Reorganize TCP congestion control (CC) initialization to simplify life of TCP CC implemented in BPF. - Add support for shipping BPF programs with the kernel and loading them early on boot via the User Mode Driver mechanism, hence reusing all the user space infra we have. - Support sleepable BPF programs, initially targeting LSM and tracing. - Add bpf_d_path() helper for returning full path for given 'struct path'. - Make bpf_tail_call compatible with bpf-to-bpf calls. - Allow BPF programs to call map_update_elem on sockmaps. - Add BPF Type Format (BTF) support for type and enum discovery, as well as support for using BTF within the kernel itself (current use is for pretty printing structures). - Support listing and getting information about bpf_links via the bpf syscall. - Enhance kernel interfaces around NIC firmware update. Allow specifying overwrite mask to control if settings etc. are reset during update; report expected max time operation may take to users; support firmware activation without machine reboot incl. limits of how much impact reset may have (e.g. dropping link or not). - Extend ethtool configuration interface to report IEEE-standard counters, to limit the need for per-vendor logic in user space. - Adopt or extend devlink use for debug, monitoring, fw update in many drivers (dsa loop, ice, ionic, sja1105, qed, mlxsw, mv88e6xxx, dpaa2-eth). - In mlxsw expose critical and emergency SFP module temperature alarms. Refactor port buffer handling to make the defaults more suitable and support setting these values explicitly via the DCBNL interface. - Add XDP support for Intel's igb driver. - Support offloading TC flower classification and filtering rules to mscc_ocelot switches. - Add PTP support for Marvell Octeontx2 and PP2.2 hardware, as well as fixed interval period pulse generator and one-step timestamping in dpaa-eth. - Add support for various auth offloads in WiFi APs, e.g. SAE (WPA3) offload. - Add Lynx PHY/PCS MDIO module, and convert various drivers which have this HW to use it. Convert mvpp2 to split PCS. - Support Marvell Prestera 98DX3255 24-port switch ASICs, as well as 7-port Mediatek MT7531 IP. - Add initial support for QCA6390 and IPQ6018 in ath11k WiFi driver, and wcn3680 support in wcn36xx. - Improve performance for packets which don't require much offloads on recent Mellanox NICs by 20% by making multiple packets share a descriptor entry. - Move chelsio inline crypto drivers (for TLS and IPsec) from the crypto subtree to drivers/net. Move MDIO drivers out of the phy directory. - Clean up a lot of W=1 warnings, reportedly the actively developed subsections of networking drivers should now build W=1 warning free. - Make sure drivers don't use in_interrupt() to dynamically adapt their code. Convert tasklets to use new tasklet_setup API (sadly this conversion is not yet complete). * tag 'net-next-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2583 commits) Revert "bpfilter: Fix build error with CONFIG_BPFILTER_UMH" net, sockmap: Don't call bpf_prog_put() on NULL pointer bpf, selftest: Fix flaky tcp_hdr_options test when adding addr to lo bpf, sockmap: Add locking annotations to iterator netfilter: nftables: allow re-computing sctp CRC-32C in 'payload' statements net: fix pos incrementment in ipv6_route_seq_next net/smc: fix invalid return code in smcd_new_buf_create() net/smc: fix valid DMBE buffer sizes net/smc: fix use-after-free of delayed events bpfilter: Fix build error with CONFIG_BPFILTER_UMH cxgb4/ch_ipsec: Replace the module name to ch_ipsec from chcr net: sched: Fix suspicious RCU usage while accessing tcf_tunnel_info bpf: Fix register equivalence tracking. rxrpc: Fix loss of final ack on shutdown rxrpc: Fix bundle counting for exclusive connections netfilter: restore NF_INET_NUMHOOKS ibmveth: Identify ingress large send packets. ibmveth: Switch order of ibmveth_helper calls. cxgb4: handle 4-tuple PEDIT to NAT mode translation selftests: Add VRF route leaking tests ...
2020-10-15Merge tag 'linux-kselftest-fixes-5.10-rc1' of ↵Linus Torvalds1-4/+6
git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pull kselftest updates from Shuah Khan: - a selftests harness fix to flush stdout before forking to avoid parent and child printing duplicates messages. This is evident when test output is redirected to a file. - a tools/ wide change to avoid comma separated statements from Joe Perches. This fix spans tools/lib, tools/power/cpupower, and selftests. * tag 'linux-kselftest-fixes-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: tools: Avoid comma separated statements selftests/harness: Flush stdout before forking
2020-10-14perf tools: Add size to 'struct perf_record_header_build_id'Jiri Olsa1-1/+11
We do not store size with build ids in perf data, but there's enough space to do it. Adding misc bit PERF_RECORD_MISC_BUILD_ID_SIZE to mark build id event with size. With this fix the dso with md5 build id will have correct build id data and will be usable for debuginfod processing if needed (coming in following patches). Committer notes: Use %zu with size_t to fix this error on 32-bit arches: util/header.c: In function '__event_process_build_id': util/header.c:2105:3: error: format '%lu' expects argument of type 'long unsigned int', but argument 6 has type 'size_t' [-Werror=format=] pr_debug("build id event received for %s: %s [%lu]\n", ^ Signed-off-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20201013192441.1299447-8-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2020-10-13Merge branch 'perf/urgent' into perf/coreArnaldo Carvalho de Melo1-0/+3
To pick fixes that missed v5.9. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2020-10-13tools lib traceevent: Hide non API functionsTzvetomir Stoyanov (VMware)6-107/+83
There are internal library functions, which are not declared as a static. They are used inside the library from different files. Hide them from the library users, as they are not part of the API. These functions are made hidden and are renamed without the prefix "tep_": tep_free_plugin_paths tep_peek_char tep_buffer_init tep_get_input_buf_ptr tep_get_input_buf tep_read_token tep_free_token tep_free_event tep_free_format_field __tep_parse_format Link: https://lore.kernel.org/linux-trace-devel/e4afdd82deb5e023d53231bb13e08dca78085fb0.camel@decadent.org.uk/ Reported-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com> Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: linux-trace-devel@vger.kernel.org Link: http://lore.kernel.org/lkml/20200930110733.280534-1-tz.stoyanov@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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