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| author |   Daniel Borkmann <daniel@iogearbox.net> | 2018-11-20 00:53:40 +0100 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-11-20 00:53:41 +0100 |
| commit | bbe5d311be6624d15df1d060094cfcb3259f3ccd (patch) | |
| tree | d134d18f7e5d8932d474d5765ed07b051fc31360 /include | |
| parent | bpf: libbpf: retry map creation without the name (diff) | |
| parent | tools: add selftest for BPF_F_ZERO_SEED (diff) | |
| download | linux-dev-bbe5d311be6624d15df1d060094cfcb3259f3ccd.tar.xz linux-dev-bbe5d311be6624d15df1d060094cfcb3259f3ccd.zip | |
Merge branch 'bpf-zero-hash-seed'
Lorenz Bauer says:
====================
Allow forcing the seed of a hash table to zero, for deterministic
execution during benchmarking and testing.
Changes from v2:
* Change ordering of BPF_F_ZERO_SEED in linux/bpf.h
Comments adressed from v1:
* Add comment to discourage production use to linux/bpf.h
* Require CAP_SYS_ADMIN
====================
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/bpf.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index 47d606d744cc..05d95290b848 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -257,9 +257,6 @@ enum bpf_attach_type { /* Specify numa node during map creation */ #define BPF_F_NUMA_NODE (1U << 2) -/* flags for BPF_PROG_QUERY */ -#define BPF_F_QUERY_EFFECTIVE (1U << 0) - #define BPF_OBJ_NAME_LEN 16U /* Flags for accessing BPF object */ @@ -269,6 +266,12 @@ enum bpf_attach_type { /* Flag for stack_map, store build_id+offset instead of pointer */ #define BPF_F_STACK_BUILD_ID (1U << 5) +/* Zero-initialize hash function seed. This should only be used for testing. */ +#define BPF_F_ZERO_SEED (1U << 6) + +/* flags for BPF_PROG_QUERY */ +#define BPF_F_QUERY_EFFECTIVE (1U << 0) + enum bpf_stack_build_id_status { /* user space need an empty entry to identify end of a trace */ BPF_STACK_BUILD_ID_EMPTY = 0, |