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9f239f68f2
Stanislav Fomichev says: ==================== If test_maps/test_verifier is running against the kernel which doesn't have _all_ BPF features enabled, it fails with an error. This patch series tries to probe kernel support for each failed test and skip it instead. This lets users run BPF selftests in the not-all-bpf-yes environments and received correct PASS/NON-PASS result. See https://www.spinics.net/lists/netdev/msg539331.html for more context. The series goes like this: * patch #1 skips sockmap tests in test_maps.c if BPF_MAP_TYPE_SOCKMAP map is not supported (if bpf_create_map fails, we probe the kernel for support) * patch #2 skips verifier tests if test->prog_type is not supported (if bpf_verify_program fails, we probe the kernel for support) * patch #3 skips verifier tests if test fixup map is not supported (if create_map fails, we probe the kernel for support) * next patches fix various small issues that arise from the first four: * patch #4 sets "unknown func bpf_trace_printk#6" prog_type to BPF_PROG_TYPE_TRACEPOINT so it is correctly skipped in CONFIG_BPF_EVENTS=n case * patch #5 exposes BPF_PROG_TYPE_CGROUP_{SKB,SOCK,SOCK_ADDR} only when CONFIG_CGROUP_BPF=y, this makes verifier correctly skip appropriate tests v3 changes: * rebased on top of Quentin's series which adds probes to libbpf v2 changes: * don't sprinkle "ifdef CONFIG_CGROUP_BPF" all around net/core/filter.c, doing it only in the bpf_types.h is enough to disable BPF_PROG_TYPE_CGROUP_{SKB,SOCK,SOCK_ADDR} prog types for non-cgroup enabled kernels ==================== Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.