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Date: Wed, 22 Jan 2020 12:22:19 -0800 From: Daniel Xu <dxu@...uu.xyz> To: bpf@...r.kernel.org, ast@...nel.org, daniel@...earbox.net, songliubraving@...com, yhs@...com, andriin@...com Cc: Daniel Xu <dxu@...uu.xyz>, linux-kernel@...r.kernel.org, kernel-team@...com, peterz@...radead.org, mingo@...hat.com, acme@...nel.org Subject: [PATCH v2 bpf-next 2/3] tools/bpf: Sync uapi header bpf.h Signed-off-by: Daniel Xu <dxu@...uu.xyz> --- tools/include/uapi/linux/bpf.h | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index 033d90a2282d..7350c5be6158 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -2885,6 +2885,16 @@ union bpf_attr { * **-EPERM** if no permission to send the *sig*. * * **-EAGAIN** if bpf program can try again. + * + * int bpf_perf_prog_read_branches(struct bpf_perf_event_data *ctx, void *buf, u32 buf_size) + * Description + * For en eBPF program attached to a perf event, retrieve the + * branch records (struct perf_branch_entry) associated to *ctx* + * and store it in the buffer pointed by *buf* up to size + * *buf_size* bytes. + * Return + * On success, number of bytes written to *buf*. On error, a + * negative value. */ #define __BPF_FUNC_MAPPER(FN) \ FN(unspec), \ @@ -3004,7 +3014,8 @@ union bpf_attr { FN(probe_read_user_str), \ FN(probe_read_kernel_str), \ FN(tcp_send_ack), \ - FN(send_signal_thread), + FN(send_signal_thread), \ + FN(perf_prog_read_branches), /* integer value in 'imm' field of BPF_CALL instruction selects which helper * function eBPF program intends to call -- 2.21.1
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