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2019-08-17selftests/bpf: add sockopt clone/inheritance testStanislav Fomichev1-0/+97
Add a test that calls setsockopt on the listener socket which triggers BPF program. This BPF program writes to the sk storage and sets clone flag. Make sure that sk storage is cloned for a newly accepted connection. We have two cloned maps in the tests to make sure we hit both cases in bpf_sk_storage_clone: first element (sk_storage_alloc) and non-first element(s) (selem_link_map). Cc: Martin KaFai Lau <kafai@fb.com> Cc: Yonghong Song <yhs@fb.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Acked-by: Yonghong Song <yhs@fb.com> Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-08-13Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextJakub Kicinski60-19/+1403
Daniel Borkmann says: ==================== The following pull-request contains BPF updates for your *net-next* tree. There is a small merge conflict in libbpf (Cc Andrii so he's in the loop as well): for (i = 1; i <= btf__get_nr_types(btf); i++) { t = (struct btf_type *)btf__type_by_id(btf, i); if (!has_datasec && btf_is_var(t)) { /* replace VAR with INT */ t->info = BTF_INFO_ENC(BTF_KIND_INT, 0, 0); <<<<<<< HEAD /* * using size = 1 is the safest choice, 4 will be too * big and cause kernel BTF validation failure if * original variable took less than 4 bytes */ t->size = 1; *(int *)(t+1) = BTF_INT_ENC(0, 0, 8); } else if (!has_datasec && kind == BTF_KIND_DATASEC) { ======= t->size = sizeof(int); *(int *)(t + 1) = BTF_INT_ENC(0, 0, 32); } else if (!has_datasec && btf_is_datasec(t)) { >>>>>>> 72ef80b5ee131e96172f19e74b4f98fa3404efe8 /* replace DATASEC with STRUCT */ Conflict is between the two commits 1d4126c4e119 ("libbpf: sanitize VAR to conservative 1-byte INT") and b03bc6853c0e ("libbpf: convert libbpf code to use new btf helpers"), so we need to pick the sanitation fixup as well as use the new btf_is_datasec() helper and the whitespace cleanup. Looks like the following: [...] if (!has_datasec && btf_is_var(t)) { /* replace VAR with INT */ t->info = BTF_INFO_ENC(BTF_KIND_INT, 0, 0); /* * using size = 1 is the safest choice, 4 will be too * big and cause kernel BTF validation failure if * original variable took less than 4 bytes */ t->size = 1; *(int *)(t + 1) = BTF_INT_ENC(0, 0, 8); } else if (!has_datasec && btf_is_datasec(t)) { /* replace DATASEC with STRUCT */ [...] The main changes are: 1) Addition of core parts of compile once - run everywhere (co-re) effort, that is, relocation of fields offsets in libbpf as well as exposure of kernel's own BTF via sysfs and loading through libbpf, from Andrii. More info on co-re: http://vger.kernel.org/bpfconf2019.html#session-2 and http://vger.kernel.org/lpc-bpf2018.html#session-2 2) Enable passing input flags to the BPF flow dissector to customize parsing and allowing it to stop early similar to the C based one, from Stanislav. 3) Add a BPF helper function that allows generating SYN cookies from XDP and tc BPF, from Petar. 4) Add devmap hash-based map type for more flexibility in device lookup for redirects, from Toke. 5) Improvements to XDP forwarding sample code now utilizing recently enabled devmap lookups, from Jesper. 6) Add support for reporting the effective cgroup progs in bpftool, from Jakub and Takshak. 7) Fix reading kernel config from bpftool via /proc/config.gz, from Peter. 8) Fix AF_XDP umem pages mapping for 32 bit architectures, from Ivan. 9) Follow-up to add two more BPF loop tests for the selftest suite, from Alexei. 10) Add perf event output helper also for other skb-based program types, from Allan. 11) Fix a co-re related compilation error in selftests, from Yonghong. ==================== Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
2019-08-13selftests/bpf: fix race in flow dissector testsPetar Penkov1-7/+6
Since the "last_dissection" map holds only the flow keys for the most recent packet, there is a small race in the skb-less flow dissector tests if a new packet comes between transmitting the test packet, and reading its keys from the map. If this happens, the test packet keys will be overwritten and the test will fail. Changing the "last_dissection" map to a hash map, keyed on the source/dest port pair resolves this issue. Additionally, let's clear the last test results from the map between tests to prevent previous test cases from interfering with the following test cases. Fixes: 0905beec9f52 ("selftests/bpf: run flow dissector tests in skb-less mode") Signed-off-by: Petar Penkov <ppenkov@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-08-07tools/bpf: fix core_reloc.c compilation errorYonghong Song1-1/+1
On my local machine, I have the following compilation errors: ===== In file included from prog_tests/core_reloc.c:3:0: ./progs/core_reloc_types.h:517:46: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘fancy_char_ptr_t’ typedef const char * const volatile restrict fancy_char_ptr_t; ^ ./progs/core_reloc_types.h:527:2: error: unknown type name ‘fancy_char_ptr_t’ fancy_char_ptr_t d; ^ ===== I am using gcc 4.8.5. Later compilers may change their behavior not emitting the error. Nevertheless, let us fix the issue. "restrict" can be tested without typedef. Fixes: 9654e2ae908e ("selftests/bpf: add CO-RE relocs modifiers/typedef tests") Cc: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-08-07selftests/bpf: add CO-RE relocs misc testsAndrii Nakryiko3-0/+87
Add tests validating few edge-cases of capturing offset relocations. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-08-07selftests/bpf: add CO-RE relocs ints testsAndrii Nakryiko10-0/+169
Add various tests validating handling compatible/incompatible integer types. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-08-07selftests/bpf: add CO-RE relocs ptr-as-array testsAndrii Nakryiko4-0/+49
Add test validating correct relocation handling for cases where pointer to something is used as an array. E.g.: int *ptr = ...; int x = ptr[42]; Signed-off-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-08-07selftests/bpf: add CO-RE relocs modifiers/typedef testsAndrii Nakryiko5-0/+143
Add tests validating correct handling of various combinations of typedefs and const/volatile/restrict modifiers. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-08-07selftests/bpf: add CO-RE relocs enum/ptr/func_proto testsAndrii Nakryiko9-0/+131
Test CO-RE relocation handling of ints, enums, pointers, func protos, etc. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-08-07selftests/bpf: add CO-RE relocs array testsAndrii Nakryiko10-0/+160
Add tests for various array handling/relocation scenarios. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-08-07selftests/bpf: add CO-RE relocs nesting testsAndrii Nakryiko15-0/+382
Add a bunch of test validating correct handling of nested structs/unions. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-08-07selftests/bpf: add CO-RE relocs struct flavors testsAndrii Nakryiko4-0/+83
Add tests verifying that BPF program can use various struct/union "flavors" to extract data from the same target struct/union. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-08-07selftests/bpf: add CO-RE relocs testing setupAndrii Nakryiko1-0/+36
Add CO-RE relocation test runner. Add one simple test validating that libbpf's logic for searching for kernel image and loading BTF out of it works. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-08-06selftests/bpf: add loop test 5Alexei Starovoitov1-0/+32
Add a test with multiple exit conditions. It's not an infinite loop only when the verifier can properly track all math on variable 'i' through all possible ways of executing this loop. barrier()s are needed to disable llvm optimization that combines multiple branches into fewer branches. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Yonghong Song <yhs@fb.com>
2019-08-06selftests/bpf: add loop test 4Alexei Starovoitov1-0/+18
Add a test that returns a 'random' number between [0, 2^20) If state pruning is not working correctly for loop body the number of processed insns will be 2^20 * num_of_insns_in_loop_body and the program will be rejected. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Yonghong Song <yhs@fb.com>
2019-08-01selftests/bpf: extend sockopt_sk selftest with TCP_CONGESTION use caseStanislav Fomichev1-0/+22
Ignore SOL_TCP:TCP_CONGESTION in getsockopt and always override SOL_TCP:TCP_CONGESTION with "cubic" in setsockopt hook. Call setsockopt(SOL_TCP, TCP_CONGESTION) with short optval ("nv") to make sure BPF program has enough buffer space to replace it with "cubic". Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-07-30selftests/bpf: add test for bpf_tcp_gen_syncookiePetar Penkov1-5/+43
Modify the existing bpf_tcp_check_syncookie test to also generate a SYN cookie, pass the packet to the kernel, and verify that the two cookies are the same (and both valid). Since cloned SKBs are skipped during generic XDP, this test does not issue a SYN cookie when run in XDP mode. We therefore only check that a valid SYN cookie was issued at the TC hook. Additionally, verify that the MSS for that SYN cookie is within expected range. Signed-off-by: Petar Penkov <ppenkov@google.com> Reviewed-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-07-25selftests/bpf: support BPF_FLOW_DISSECTOR_F_STOP_AT_ENCAPStanislav Fomichev1-0/+8
Exit as soon as we found that packet is encapped when BPF_FLOW_DISSECTOR_F_STOP_AT_ENCAP is passed. Add appropriate selftest cases. v2: * Subtract sizeof(struct iphdr) from .iph_inner.tot_len (Willem de Bruijn) Acked-by: Petar Penkov <ppenkov@google.com> Acked-by: Willem de Bruijn <willemb@google.com> Acked-by: Song Liu <songliubraving@fb.com> Cc: Song Liu <songliubraving@fb.com> Cc: Willem de Bruijn <willemb@google.com> Cc: Petar Penkov <ppenkov@google.com> Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-07-25bpf/flow_dissector: support ipv6 flow_label and BPF_FLOW_DISSECTOR_F_STOP_AT_FLOW_LABELStanislav Fomichev1-0/+10
Add support for exporting ipv6 flow label via bpf_flow_keys. Export flow label from bpf_flow.c and also return early when BPF_FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL is passed. Acked-by: Petar Penkov <ppenkov@google.com> Acked-by: Willem de Bruijn <willemb@google.com> Acked-by: Song Liu <songliubraving@fb.com> Cc: Song Liu <songliubraving@fb.com> Cc: Willem de Bruijn <willemb@google.com> Cc: Petar Penkov <ppenkov@google.com> Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-07-25selftests/bpf: support BPF_FLOW_DISSECTOR_F_PARSE_1ST_FRAGStanislav Fomichev1-6/+23
bpf_flow.c: exit early unless BPF_FLOW_DISSECTOR_F_PARSE_1ST_FRAG is passed in flags. Also, set ip_proto earlier, this makes sure we have correct value with fragmented packets. Add selftest cases to test ipv4/ipv6 fragments and skip eth_get_headlen tests that don't have BPF_FLOW_DISSECTOR_F_PARSE_1ST_FRAG flag. eth_get_headlen calls flow dissector with BPF_FLOW_DISSECTOR_F_PARSE_1ST_FRAG flag so we can't run tests that have different set of input flags against it. v2: * sefltests -> selftests (Willem de Bruijn) * Reword a comment about eth_get_headlen flags (Song Liu) Acked-by: Petar Penkov <ppenkov@google.com> Acked-by: Willem de Bruijn <willemb@google.com> Acked-by: Song Liu <songliubraving@fb.com> Cc: Song Liu <songliubraving@fb.com> Cc: Willem de Bruijn <willemb@google.com> Cc: Petar Penkov <ppenkov@google.com> Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-07-23selftests/bpf: convert test_get_stack_raw_tp to perf_buffer APIAndrii Nakryiko1-1/+1
Convert test_get_stack_raw_tp test to new perf_buffer API. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-07-22selftests/bpf: fix sendmsg6_prog on s390Ilya Leoshkevich1-2/+1
"sendmsg6: rewrite IP & port (C)" fails on s390, because the code in sendmsg_v6_prog() assumes that (ctx->user_ip6[0] & 0xFFFF) refers to leading IPv6 address digits, which is not the case on big-endian machines. Since checking bitwise operations doesn't seem to be the point of the test, replace two short comparisons with a single int comparison. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Acked-by: Andrey Ignatov <rdna@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-07-18selftests/bpf: fix test_xdp_noinline on s390Ilya Leoshkevich1-8/+9
test_xdp_noinline fails on s390 due to a handful of endianness issues. Use ntohs for parsing eth_proto. Replace bswaps with ntohs/htons. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Acked-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-07-15selftests/bpf: use typedef'ed arrays as map valuesAndrii Nakryiko3-4/+4
Convert few tests that couldn't use typedef'ed arrays due to kernel bug. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-07-12selftests/bpf: fix compiling loop{1, 2, 3}.c on s390Ilya Leoshkevich3-3/+3
Use PT_REGS_RC(ctx) instead of ctx->rax, which is not present on s390. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Stanislav Fomichev <sdf@google.com> Tested-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-07-08Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-6/+6
Two cases of overlapping changes, nothing fancy. Signed-off-by: David S. Miller <davem@davemloft.net>
2019-07-08selftests/bpf: fix test_attach_probe map definitionAndrii Nakryiko1-8/+5
ef99b02b23ef ("libbpf: capture value in BTF type info for BTF-defined map defs") changed BTF-defined maps syntax, while independently merged 1e8611bbdfc9 ("selftests/bpf: add kprobe/uprobe selftests") added new test using outdated syntax of maps. This patch fixes this test after corresponding patch sets were merged. Fixes: ef99b02b23ef ("libbpf: capture value in BTF type info for BTF-defined map defs") Fixes: 1e8611bbdfc9 ("selftests/bpf: add kprobe/uprobe selftests") Signed-off-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-07-08selftests/bpf: test perf buffer APIAndrii Nakryiko1-0/+25
Add test verifying perf buffer API functionality. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Acked-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-07-05selftests/bpf: convert legacy BPF maps to BTF-defined onesAndrii Nakryiko9-166/+158
Convert selftests that were originally left out and new ones added recently to consistently use BTF-defined maps. Reported-by: kernel test robot <rong.a.chen@intel.com> Signed-off-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Acked-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-07-05selftests/bpf: convert selftests using BTF-defined maps to new syntaxAndrii Nakryiko20-494/+300
Convert all the existing selftests that are already using BTF-defined maps to use new syntax (with no static data initialization). Signed-off-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Acked-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-07-05selftests/bpf: add kprobe/uprobe selftestsAndrii Nakryiko1-0/+55
Add tests verifying kprobe/kretprobe/uprobe/uretprobe APIs work as expected. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Reviewed-by: Stanislav Fomichev <sdf@google.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-07-03selftests/bpf: test BPF_SOCK_OPS_RTT_CBStanislav Fomichev1-0/+61
Make sure the callback is invoked for syn-ack and data packet. Cc: Eric Dumazet <edumazet@google.com> Cc: Priyaranjan Jha <priyarjha@google.com> Cc: Yuchung Cheng <ycheng@google.com> Cc: Soheil Hassas Yeganeh <soheil@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Acked-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-07-03selftests: bpf: fix inlines in test_lwt_seg6localJiri Benc1-6/+6
Selftests are reporting this failure in test_lwt_seg6local.sh: + ip netns exec ns2 ip -6 route add fb00::6 encap bpf in obj test_lwt_seg6local.o sec encap_srh dev veth2 Error fetching program/map! Failed to parse eBPF program: Operation not permitted The problem is __attribute__((always_inline)) alone is not enough to prevent clang from inserting those functions in .text. In that case, .text is not marked as relocateable. See the output of objdump -h test_lwt_seg6local.o: Idx Name Size VMA LMA File off Algn 0 .text 00003530 0000000000000000 0000000000000000 00000040 2**3 CONTENTS, ALLOC, LOAD, READONLY, CODE This causes the iproute bpf loader to fail in bpf_fetch_prog_sec: bpf_has_call_data returns true but bpf_fetch_prog_relo fails as there's no relocateable .text section in the file. To fix this, convert to 'static __always_inline'. v2: Use 'static __always_inline' instead of 'static inline __attribute__((always_inline))' Fixes: c99a84eac026 ("selftests/bpf: test for seg6local End.BPF action") Signed-off-by: Jiri Benc <jbenc@redhat.com> Acked-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-07-03selftests: bpf: standardize to static __always_inlineJiri Benc5-35/+38
The progs for bpf selftests use several different notations to force function inlining. Standardize to what most of them use, static __always_inline. Suggested-by: Song Liu <liu.song.a23@gmail.com> Signed-off-by: Jiri Benc <jbenc@redhat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-06-27selftests/bpf: add sockopt test that exercises BPF_F_ALLOW_MULTIStanislav Fomichev1-0/+71
sockopt test that verifies chaining behavior. v9: * setsockopt chaining example v7: * rework the test to verify cgroup getsockopt chaining Cc: Andrii Nakryiko <andriin@fb.com> Cc: Martin Lau <kafai@fb.com> Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-06-27selftests/bpf: add sockopt test that exercises sk helpersStanislav Fomichev1-0/+111
socktop test that introduces new SOL_CUSTOM sockopt level and stores whatever users sets in sk storage. Whenever getsockopt is called, the original value is retrieved. v9: * SO_SNDBUF example to override user-supplied buffer v7: * use retval=0 and optlen-1 v6: * test 'ret=1' use-case as well (Alexei Starovoitov) v4: * don't call bpf_sk_fullsock helper v3: * drop (__u8 *)(long) casts for optval{,_end} v2: * new test Cc: Andrii Nakryiko <andriin@fb.com> Cc: Martin Lau <kafai@fb.com> Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-06-24selftests, bpf: Add test for veth native XDPToshiaki Makita2-0/+43
Add a test case for veth native XDP. It checks if XDP_PASS, XDP_TX and XDP_REDIRECT work properly. $ cd tools/testing/selftests/bpf $ make \ TEST_CUSTOM_PROGS= \ TEST_GEN_PROGS= \ TEST_GEN_PROGS_EXTENDED= \ TEST_PROGS_EXTENDED= \ TEST_PROGS="test_xdp_veth.sh" \ run_tests TAP version 13 1..1 # selftests: bpf: test_xdp_veth.sh # PING 10.1.1.33 (10.1.1.33) 56(84) bytes of data. # 64 bytes from 10.1.1.33: icmp_seq=1 ttl=64 time=0.073 ms # # --- 10.1.1.33 ping statistics --- # 1 packets transmitted, 1 received, 0% packet loss, time 0ms # rtt min/avg/max/mdev = 0.073/0.073/0.073/0.000 ms # selftests: xdp_veth [PASS] ok 1 selftests: bpf: test_xdp_veth.sh Signed-off-by: Toshiaki Makita <toshiaki.makita1@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-06-20Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextDavid S. Miller38-230/+1766
Alexei Starovoitov says: ==================== pull-request: bpf-next 2019-06-19 The following pull-request contains BPF updates for your *net-next* tree. The main changes are: 1) new SO_REUSEPORT_DETACH_BPF setsocktopt, from Martin. 2) BTF based map definition, from Andrii. 3) support bpf_map_lookup_elem for xskmap, from Jonathan. 4) bounded loops and scalar precision logic in the verifier, from Alexei. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2019-06-19selftests/bpf: add realistic loop testsAlexei Starovoitov14-1/+1291
Add a bunch of loop tests. Most of them are created by replacing '#pragma unroll' with '#pragma clang loop unroll(disable)' Several tests are artificially large: /* partial unroll. llvm will unroll loop ~150 times. * C loop count -> 600. * Asm loop count -> 4. * 16k insns in loop body. * Total of 5 such loops. Total program size ~82k insns. */ "./pyperf600.o", /* no unroll at all. * C loop count -> 600. * ASM loop count -> 600. * ~110 insns in loop body. * Total of 5 such loops. Total program size ~1500 insns. */ "./pyperf600_nounroll.o", /* partial unroll. 19k insn in a loop. * Total program size 20.8k insn. * ~350k processed_insns */ "./strobemeta.o", Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-06-18selftests/bpf: convert tests w/ custom values to BTF-defined mapsAndrii Nakryiko14-140/+285
Convert a bulk of selftests that have maps with custom (not integer) key and/or value. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-06-18selftests/bpf: switch BPF_ANNOTATE_KV_PAIR tests to BTF-defined mapsAndrii Nakryiko5-72/+87
Switch tests that already rely on BTF to BTF-defined map definitions. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-06-18selftests/bpf: add test for BTF-defined mapsAndrii Nakryiko1-0/+73
Add file test for BTF-defined map definition. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-06-15selftests/bpf: convert socket_cookie test to sk storageStanislav Fomichev1-17/+29
This lets us test that both BPF_PROG_TYPE_CGROUP_SOCK_ADDR and BPF_PROG_TYPE_SOCK_OPS can access underlying bpf_sock. Cc: Martin Lau <kafai@fb.com> Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-06-11selftests/bpf: remove bpf_util.h from BPF C progsHechao Li4-4/+5
Though currently there is no problem including bpf_util.h in kernel space BPF C programs, in next patch in this stack, I will reuse libbpf_num_possible_cpus() in bpf_util.h thus include libbpf.h in it, which will cause BPF C programs compile error. Therefore I will first remove bpf_util.h from all test BPF programs. This can also make it clear that bpf_util.h is a user-space utility while bpf_helpers.h is a kernel space utility. Signed-off-by: Hechao Li <hechaol@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-06-07Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller3-12/+3
Some ISDN files that got removed in net-next had some changes done in mainline, take the removals. Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-31selftests/bpf: measure RTT from xdp using xdpingAlan Maguire1-0/+184
xdping allows us to get latency estimates from XDP. Output looks like this: ./xdping -I eth4 192.168.55.8 Setting up XDP for eth4, please wait... XDP setup disrupts network connectivity, hit Ctrl+C to quit Normal ping RTT data [Ignore final RTT; it is distorted by XDP using the reply] PING 192.168.55.8 (192.168.55.8) from 192.168.55.7 eth4: 56(84) bytes of data. 64 bytes from 192.168.55.8: icmp_seq=1 ttl=64 time=0.302 ms 64 bytes from 192.168.55.8: icmp_seq=2 ttl=64 time=0.208 ms 64 bytes from 192.168.55.8: icmp_seq=3 ttl=64 time=0.163 ms 64 bytes from 192.168.55.8: icmp_seq=8 ttl=64 time=0.275 ms 4 packets transmitted, 4 received, 0% packet loss, time 3079ms rtt min/avg/max/mdev = 0.163/0.237/0.302/0.054 ms XDP RTT data: 64 bytes from 192.168.55.8: icmp_seq=5 ttl=64 time=0.02808 ms 64 bytes from 192.168.55.8: icmp_seq=6 ttl=64 time=0.02804 ms 64 bytes from 192.168.55.8: icmp_seq=7 ttl=64 time=0.02815 ms 64 bytes from 192.168.55.8: icmp_seq=8 ttl=64 time=0.02805 ms The xdping program loads the associated xdping_kern.o BPF program and attaches it to the specified interface. If run in client mode (the default), it will add a map entry keyed by the target IP address; this map will store RTT measurements, current sequence number etc. Finally in client mode the ping command is executed, and the xdping BPF program will use the last ICMP reply, reformulate it as an ICMP request with the next sequence number and XDP_TX it. After the reply to that request is received we can measure RTT and repeat until the desired number of measurements is made. This is why the sequence numbers in the normal ping are 1, 2, 3 and 8. We XDP_TX a modified version of ICMP reply 4 and keep doing this until we get the 4 replies we need; hence the networking stack only sees reply 8, where we have XDP_PASSed it upstream since we are done. In server mode (-s), xdping simply takes ICMP requests and replies to them in XDP rather than passing the request up to the networking stack. No map entry is required. xdping can be run in native XDP mode (the default, or specified via -N) or in skb mode (-S). A test program test_xdping.sh exercises some of these options. Note that native XDP does not seem to XDP_TX for veths, hence -N is not tested. Looking at the code, it looks like XDP_TX is supported so I'm not sure if that's expected. Running xdping in native mode for ixgbe as both client and server works fine. Changes since v4 - close fds on cleanup (Song Liu) Changes since v3 - fixed seq to be __be16 (Song Liu) - fixed fd checks in xdping.c (Song Liu) Changes since v2 - updated commit message to explain why seq number of last ICMP reply is 8 not 4 (Song Liu) - updated types of seq number, raddr and eliminated csum variable in xdpclient/xdpserver functions as it was not needed (Song Liu) - added XDPING_DEFAULT_COUNT definition and usage specification of default/max counts (Song Liu) Changes since v1 - moved from RFC to PATCH - removed unused variable in ipv4_csum() (Song Liu) - refactored ICMP checks into icmp_check() function called by client and server programs and reworked client and server programs due to lack of shared code (Song Liu) - added checks to ensure that SKB and native mode are not requested together (Song Liu) Signed-off-by: Alan Maguire <alan.maguire@oracle.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206Thomas Gleixner3-12/+3
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of version 2 of the gnu general public license as published by the free software foundation extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 107 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528171438.615055994@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-24tools/bpf: add selftest in test_progs for bpf_send_signal() helperYonghong Song1-0/+51
The test covered both nmi and tracepoint perf events. $ ./test_progs ... test_send_signal_tracepoint:PASS:tracepoint 0 nsec ... test_send_signal_common:PASS:tracepoint 0 nsec ... test_send_signal_common:PASS:perf_event 0 nsec ... test_send_signal:OK Acked-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-05-24selftests/bpf: add btf_dump BTF-to-C conversion testsAndrii Nakryiko7-0/+678
Add new test_btf_dump set of tests, validating BTF-to-C conversion correctness. Tests rely on clang to generate BTF from provided C test cases. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-05-24selftests: bpf: Move bpf_printk to bpf_helpers.hMichal Rostecki5-35/+0
bpf_printk is a macro which is commonly used to print out debug messages in BPF programs and it was copied in many selftests and samples. Since all of them include bpf_helpers.h, this change moves the macro there. Signed-off-by: Michal Rostecki <mrostecki@opensuse.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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