diff options
| author |   YiFei Zhu <zhuyifei@google.com> | 2020-09-15 16:45:41 -0700 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2020-09-15 18:28:27 -0700 |
| commit | 5d23328dccd93c47e2719cb9d2ae303c235d277d (patch) | |
| tree | 9e6e301201a9a5f400125dcfa8d9cd1e9c5ec4ef /tools/lib/bpf/bpf.c | |
| parent | bpf: Add BPF_PROG_BIND_MAP syscall (diff) | |
| download | linux-dev-5d23328dccd93c47e2719cb9d2ae303c235d277d.tar.xz linux-dev-5d23328dccd93c47e2719cb9d2ae303c235d277d.zip | |
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.c')
| -rw-r--r-- | tools/lib/bpf/bpf.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 82b983ff6569..2baa1308737c 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -872,3 +872,19 @@ int bpf_enable_stats(enum bpf_stats_type type) return sys_bpf(BPF_ENABLE_STATS, &attr, sizeof(attr)); } + +int bpf_prog_bind_map(int prog_fd, int map_fd, + const struct bpf_prog_bind_opts *opts) +{ + union bpf_attr attr; + + if (!OPTS_VALID(opts, bpf_prog_bind_opts)) + return -EINVAL; + + memset(&attr, 0, sizeof(attr)); + attr.prog_bind_map.prog_fd = prog_fd; + attr.prog_bind_map.map_fd = map_fd; + attr.prog_bind_map.flags = OPTS_GET(opts, flags, 0); + + return sys_bpf(BPF_PROG_BIND_MAP, &attr, sizeof(attr)); +} |