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| author | Daniel T. Lee <danieltimlee@gmail.com> | 2020-08-23 17:53:33 +0900 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2020-08-24 20:59:35 -0700 |
| commit | 3677d0a13171bb1dc8db0af84d48dea14a899962 (patch) | |
| tree | 3de96b317e44d7e1eb175a4be093101f317e88ff /samples/bpf/test_probe_write_user_kern.c | |
| parent | 35a8b6dd339f04cbcb0b2d085334263542a12b70 (diff) | |
| download | linux-3677d0a13171bb1dc8db0af84d48dea14a899962.tar.gz linux-3677d0a13171bb1dc8db0af84d48dea14a899962.tar.bz2 linux-3677d0a13171bb1dc8db0af84d48dea14a899962.zip | |
samples: bpf: Refactor kprobe tracing programs with libbpf
For the problem of increasing fragmentation of the bpf loader programs,
instead of using bpf_loader.o, which is used in samples/bpf, this
commit refactors the existing kprobe tracing programs with libbbpf
bpf loader.
- For kprobe events pointing to system calls, the SYSCALL() macro in
trace_common.h was used.
- Adding a kprobe event and attaching a bpf program to it was done
through bpf_program_attach().
- Instead of using the existing BPF MAP definition, MAP definition
has been refactored with the new BTF-defined MAP format.
Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200823085334.9413-3-danieltimlee@gmail.com
Diffstat (limited to 'samples/bpf/test_probe_write_user_kern.c')
| -rw-r--r-- | samples/bpf/test_probe_write_user_kern.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/samples/bpf/test_probe_write_user_kern.c b/samples/bpf/test_probe_write_user_kern.c index fd651a65281e..220a96438d75 100644 --- a/samples/bpf/test_probe_write_user_kern.c +++ b/samples/bpf/test_probe_write_user_kern.c @@ -13,12 +13,12 @@ #include <bpf/bpf_core_read.h> #include "trace_common.h" -struct bpf_map_def SEC("maps") dnat_map = { - .type = BPF_MAP_TYPE_HASH, - .key_size = sizeof(struct sockaddr_in), - .value_size = sizeof(struct sockaddr_in), - .max_entries = 256, -}; +struct { + __uint(type, BPF_MAP_TYPE_HASH); + __type(key, struct sockaddr_in); + __type(value, struct sockaddr_in); + __uint(max_entries, 256); +} dnat_map SEC(".maps"); /* kprobe is NOT a stable ABI * kernel functions can be removed, renamed or completely change semantics. |