tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
bpf: Add bpf_verify_program() to the library.
This allows a test case to load a BPF program and unconditionally
acquire the verifier log.
It also allows specification of the strict alignment flag.
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
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+22
tools/lib/bpf/bpf.c
+22
tools/lib/bpf/bpf.c
···
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return sys_bpf(BPF_PROG_LOAD, &attr, sizeof(attr));
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}
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int bpf_verify_program(enum bpf_prog_type type, const struct bpf_insn *insns,
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size_t insns_cnt, int strict_alignment,
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const char *license, __u32 kern_version,
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char *log_buf, size_t log_buf_sz)
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{
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union bpf_attr attr;
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bzero(&attr, sizeof(attr));
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attr.prog_type = type;
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attr.insn_cnt = (__u32)insns_cnt;
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attr.insns = ptr_to_u64(insns);
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attr.license = ptr_to_u64(license);
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attr.log_buf = ptr_to_u64(log_buf);
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attr.log_size = log_buf_sz;
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attr.log_level = 2;
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log_buf[0] = 0;
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attr.kern_version = kern_version;
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attr.prog_flags = strict_alignment ? BPF_F_STRICT_ALIGNMENT : 0;
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return sys_bpf(BPF_PROG_LOAD, &attr, sizeof(attr));
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}
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int bpf_map_update_elem(int fd, const void *key, const void *value,
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__u64 flags)
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{
+4
tools/lib/bpf/bpf.h
+4
tools/lib/bpf/bpf.h
···
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size_t insns_cnt, const char *license,
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__u32 kern_version, char *log_buf,
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size_t log_buf_sz);
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int bpf_verify_program(enum bpf_prog_type type, const struct bpf_insn *insns,
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size_t insns_cnt, int strict_alignment,
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const char *license, __u32 kern_version,
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char *log_buf, size_t log_buf_sz);
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int bpf_map_update_elem(int fd, const void *key, const void *value,
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__u64 flags);