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authorYiFei Zhu <zhuyifei@google.com>2020-09-16 02:45:41 +0300
committerAlexei Starovoitov <ast@kernel.org>2020-09-16 04:28:27 +0300
commit5d23328dccd93c47e2719cb9d2ae303c235d277d (patch)
tree9e6e301201a9a5f400125dcfa8d9cd1e9c5ec4ef /tools/lib/bpf/bpf.h
parentef15314aa5de955c6afd87d512e8b00f5ac08d06 (diff)
downloadlinux-5d23328dccd93c47e2719cb9d2ae303c235d277d.tar.xz
libbpf: Add BPF_PROG_BIND_MAP syscall and use it on .rodata section
The patch adds a simple wrapper bpf_prog_bind_map around the syscall. When the libbpf tries to load a program, it will probe the kernel for the support of this syscall and unconditionally bind .rodata section to the program. Signed-off-by: YiFei Zhu <zhuyifei@google.com> Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Cc: YiFei Zhu <zhuyifei1999@gmail.com> Link: https://lore.kernel.org/bpf/20200915234543.3220146-4-sdf@google.com
Diffstat (limited to 'tools/lib/bpf/bpf.h')
-rw-r--r--tools/lib/bpf/bpf.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index 015d13f25fcc..8c1ac4b42f90 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -243,6 +243,14 @@ LIBBPF_API int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf,
enum bpf_stats_type; /* defined in up-to-date linux/bpf.h */
LIBBPF_API int bpf_enable_stats(enum bpf_stats_type type);
+struct bpf_prog_bind_opts {
+ size_t sz; /* size of this struct for forward/backward compatibility */
+ __u32 flags;
+};
+#define bpf_prog_bind_opts__last_field flags
+
+LIBBPF_API int bpf_prog_bind_map(int prog_fd, int map_fd,
+ const struct bpf_prog_bind_opts *opts);
#ifdef __cplusplus
} /* extern "C" */
#endif