mirror of
https://gitee.com/bianbu-linux/linux-6.6
synced 2025-07-08 00:23:23 -04:00
- Use /usr/bin/env for shebang lines in scripts - Remove useless -Wnested-externs warning flag - Update documents - Refactor log handling in modpost - Stop building modules without MODULE_LICENSE() tag - Make the insane combination of 'static' and EXPORT_SYMBOL an error - Improve genksyms to handle _Static_assert() -----BEGIN PGP SIGNATURE----- iQJJBAABCgAzFiEEbmPs18K1szRHjPqEPYsBB53g2wYFAl/iIY8VHG1hc2FoaXJv eUBrZXJuZWwub3JnAAoJED2LAQed4NsGbfsP+gMv3F+ztqfYNoMNmZcj+fLh4zrA 8I3d0t0AoxovV1bsyVDk9nebsYLbDdsyCdHM1ZNFAFEpf9QLL8sxtpHvaaxy+rCq PCmy+E6iO5B91oORhuqpYpcmmgPHf4RrpUcnEEiWOMrHE5giYbXz3AiqGAt/88J5 Y8yaPCQVhNJNkx73KHCMYLVp97xPGa5HvNrcskAueA8uG+FCRDFaIqFX+OYbGnmC /3kVAJmX6i2kNPzvnXpAW6mTbI/z7+s/k5yRbEFYNUtJqN+BfaFadV8pyOGXQr1T fwXVtXdWqVg7rbqupyVYItLHaOq2RBm4PJuee/8s7ooBI1y7U6N0HZCj+jES92ML wuqEyED+lLzmxRyfhmrFH/5XhxacciO7dQb9Woe5FQ6QOm+tQPtwCnxwrSSAK4XU k7CsJ+OMJI+JulFrgPuC/rcESjTAsgL2j4SDhsO0GLV+Qb/P9kXR88jt5eJygmSx xZWpI+FUUY/Ihw648i2pkHGS/NmfOrT78X4nvbOWMDKOV02NEoMmLDYnZPUIoetn yUo8+xSBp6n3aTy5TDtrMblNRUJwL9OzDlDiEjsPtNUJZ6sdQzFRsxJ7+FCw2Ley rKN2r+i5FdyAq0LLHDhoEcJxFY7cj+yAsd0QqtBb0NZLgLsaPiP7w45CXRNpqkWG BbK+F1E9jP8VfiZu =+27V -----END PGP SIGNATURE----- Merge tag 'kbuild-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - Use /usr/bin/env for shebang lines in scripts - Remove useless -Wnested-externs warning flag - Update documents - Refactor log handling in modpost - Stop building modules without MODULE_LICENSE() tag - Make the insane combination of 'static' and EXPORT_SYMBOL an error - Improve genksyms to handle _Static_assert() * tag 'kbuild-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: Documentation/kbuild: Document platform dependency practises Documentation/kbuild: Document COMPILE_TEST dependencies genksyms: Ignore module scoped _Static_assert() modpost: turn static exports into error modpost: turn section mismatches to error from fatal() modpost: change license incompatibility to error() from fatal() modpost: turn missing MODULE_LICENSE() into error modpost: refactor error handling and clarify error/fatal difference modpost: rename merror() to error() kbuild: don't hardcode depmod path kbuild: doc: document subdir-y syntax kbuild: doc: clarify the difference between extra-y and always-y kbuild: doc: split if_changed explanation to a separate section kbuild: doc: merge 'Special Rules' and 'Custom kbuild commands' sections kbuild: doc: fix 'List directories to visit when descending' section kbuild: doc: replace arch/$(ARCH)/ with arch/$(SRCARCH)/ kbuild: doc: update the description about kbuild Makefiles Makefile.extrawarn: remove -Wnested-externs warning tweewide: Fix most Shebang lines |
||
---|---|---|
.. | ||
benchs | ||
bpf_testmod | ||
gnu | ||
map_tests | ||
prog_tests | ||
progs | ||
verifier | ||
.gitignore | ||
bench.c | ||
bench.h | ||
bpf_legacy.h | ||
bpf_rand.h | ||
bpf_rlimit.h | ||
bpf_tcp_helpers.h | ||
bpf_util.h | ||
btf_helpers.c | ||
btf_helpers.h | ||
cgroup_helpers.c | ||
cgroup_helpers.h | ||
config | ||
flow_dissector_load.c | ||
flow_dissector_load.h | ||
get_cgroup_id_user.c | ||
ima_setup.sh | ||
Makefile | ||
netcnt_common.h | ||
network_helpers.c | ||
network_helpers.h | ||
README.rst | ||
settings | ||
test_bpftool.py | ||
test_bpftool.sh | ||
test_bpftool_build.sh | ||
test_bpftool_metadata.sh | ||
test_btf.h | ||
test_cgroup_storage.c | ||
test_cpp.cpp | ||
test_current_pid_tgid_new_ns.c | ||
test_dev_cgroup.c | ||
test_flow_dissector.c | ||
test_flow_dissector.sh | ||
test_ftrace.sh | ||
test_iptunnel_common.h | ||
test_kmod.sh | ||
test_lirc_mode2.sh | ||
test_lirc_mode2_user.c | ||
test_lpm_map.c | ||
test_lru_map.c | ||
test_lwt_ip_encap.sh | ||
test_lwt_seg6local.sh | ||
test_maps.c | ||
test_maps.h | ||
test_netcnt.c | ||
test_offload.py | ||
test_progs.c | ||
test_progs.h | ||
test_select_reuseport_common.h | ||
test_skb_cgroup_id.sh | ||
test_skb_cgroup_id_user.c | ||
test_sock.c | ||
test_sock_addr.c | ||
test_sock_addr.sh | ||
test_socket_cookie.c | ||
test_sockmap.c | ||
test_stub.c | ||
test_sysctl.c | ||
test_tag.c | ||
test_tc_edt.sh | ||
test_tc_redirect.sh | ||
test_tc_tunnel.sh | ||
test_tcp_check_syncookie.sh | ||
test_tcp_check_syncookie_user.c | ||
test_tcp_hdr_options.h | ||
test_tcpbpf.h | ||
test_tcpnotify.h | ||
test_tcpnotify_user.c | ||
test_tunnel.sh | ||
test_verifier.c | ||
test_verifier_log.c | ||
test_xdp_meta.sh | ||
test_xdp_redirect.sh | ||
test_xdp_veth.sh | ||
test_xdp_vlan.sh | ||
test_xdp_vlan_mode_generic.sh | ||
test_xdp_vlan_mode_native.sh | ||
test_xdping.sh | ||
test_xsk.sh | ||
testing_helpers.c | ||
testing_helpers.h | ||
trace_helpers.c | ||
trace_helpers.h | ||
urandom_read.c | ||
with_addr.sh | ||
with_tunnels.sh | ||
xdping.c | ||
xdping.h | ||
xdpxceiver.c | ||
xdpxceiver.h | ||
xsk_prereqs.sh |
================== BPF Selftest Notes ================== General instructions on running selftests can be found in `Documentation/bpf/bpf_devel_QA.rst`__. __ /Documentation/bpf/bpf_devel_QA.rst#q-how-to-run-bpf-selftests Additional information about selftest failures are documented here. profiler[23] test failures with clang/llvm <12.0.0 ================================================== With clang/llvm <12.0.0, the profiler[23] test may fail. The symptom looks like .. code-block:: c // r9 is a pointer to map_value // r7 is a scalar 17: bf 96 00 00 00 00 00 00 r6 = r9 18: 0f 76 00 00 00 00 00 00 r6 += r7 math between map_value pointer and register with unbounded min value is not allowed // the instructions below will not be seen in the verifier log 19: a5 07 01 00 01 01 00 00 if r7 < 257 goto +1 20: bf 96 00 00 00 00 00 00 r6 = r9 // r6 is used here The verifier will reject such code with above error. At insn 18 the r7 is indeed unbounded. The later insn 19 checks the bounds and the insn 20 undoes map_value addition. It is currently impossible for the verifier to understand such speculative pointer arithmetic. Hence `this patch`__ addresses it on the compiler side. It was committed on llvm 12. __ https://reviews.llvm.org/D85570 The corresponding C code .. code-block:: c for (int i = 0; i < MAX_CGROUPS_PATH_DEPTH; i++) { filepart_length = bpf_probe_read_str(payload, ...); if (filepart_length <= MAX_PATH) { barrier_var(filepart_length); // workaround payload += filepart_length; } } bpf_iter test failures with clang/llvm 10.0.0 ============================================= With clang/llvm 10.0.0, the following two bpf_iter tests failed: * ``bpf_iter/ipv6_route`` * ``bpf_iter/netlink`` The symptom for ``bpf_iter/ipv6_route`` looks like .. code-block:: c 2: (79) r8 = *(u64 *)(r1 +8) ... 14: (bf) r2 = r8 15: (0f) r2 += r1 ; BPF_SEQ_PRINTF(seq, "%pi6 %02x ", &rt->fib6_dst.addr, rt->fib6_dst.plen); 16: (7b) *(u64 *)(r8 +64) = r2 only read is supported The symptom for ``bpf_iter/netlink`` looks like .. code-block:: c ; struct netlink_sock *nlk = ctx->sk; 2: (79) r7 = *(u64 *)(r1 +8) ... 15: (bf) r2 = r7 16: (0f) r2 += r1 ; BPF_SEQ_PRINTF(seq, "%pK %-3d ", s, s->sk_protocol); 17: (7b) *(u64 *)(r7 +0) = r2 only read is supported This is due to a llvm BPF backend bug. `The fix`__ has been pushed to llvm 10.x release branch and will be available in 10.0.1. The patch is available in llvm 11.0.0 trunk. __ https://reviews.llvm.org/D78466 BPF CO-RE-based tests and Clang version ======================================= A set of selftests use BPF target-specific built-ins, which might require bleeding-edge Clang versions (Clang 12 nightly at this time). Few sub-tests of core_reloc test suit (part of test_progs test runner) require the following built-ins, listed with corresponding Clang diffs introducing them to Clang/LLVM. These sub-tests are going to be skipped if Clang is too old to support them, they shouldn't cause build failures or runtime test failures: - __builtin_btf_type_id() [0_, 1_, 2_]; - __builtin_preserve_type_info(), __builtin_preserve_enum_value() [3_, 4_]. .. _0: https://reviews.llvm.org/D74572 .. _1: https://reviews.llvm.org/D74668 .. _2: https://reviews.llvm.org/D85174 .. _3: https://reviews.llvm.org/D83878 .. _4: https://reviews.llvm.org/D83242