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author | Dave Marchevsky <davemarchevsky@fb.com> | 2021-09-17 11:29:03 -0700 |
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committer | Alexei Starovoitov <ast@kernel.org> | 2021-09-17 14:02:05 -0700 |
commit | 335ff4990cf3bfa42d8846f9b3d8c09456f51801 (patch) | |
tree | d412d05c1ed76a3a1d2f44b2361bcdf7a24b7cd6 /include/linux/bpf.h | |
parent | af54faab84f754ebd42ecdda871f8d71940ae40b (diff) | |
download | linux-stable-335ff4990cf3bfa42d8846f9b3d8c09456f51801.tar.gz linux-stable-335ff4990cf3bfa42d8846f9b3d8c09456f51801.tar.bz2 linux-stable-335ff4990cf3bfa42d8846f9b3d8c09456f51801.zip |
bpf: Merge printk and seq_printf VARARG max macros
MAX_SNPRINTF_VARARGS and MAX_SEQ_PRINTF_VARARGS are used by bpf helpers
bpf_snprintf and bpf_seq_printf to limit their varargs. Both call into
bpf_bprintf_prepare for print formatting logic and have convenience
macros in libbpf (BPF_SNPRINTF, BPF_SEQ_PRINTF) which use the same
helper macros to convert varargs to a byte array.
Changing shared functionality to support more varargs for either bpf
helper would affect the other as well, so let's combine the _VARARGS
macros to make this more obvious.
Signed-off-by: Dave Marchevsky <davemarchevsky@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210917182911.2426606-2-davemarchevsky@fb.com
Diffstat (limited to 'include/linux/bpf.h')
-rw-r--r-- | include/linux/bpf.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h index f4c16f19f83e..be8d57e6e78a 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -2216,6 +2216,8 @@ int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t, struct btf_id_set; bool btf_id_set_contains(const struct btf_id_set *set, u32 id); +#define MAX_BPRINTF_VARARGS 12 + int bpf_bprintf_prepare(char *fmt, u32 fmt_size, const u64 *raw_args, u32 **bin_buf, u32 num_args); void bpf_bprintf_cleanup(void); |