From 1f8919b170318e7e13e303eedac363d44057995f Mon Sep 17 00:00:00 2001 From: Peter Wu Date: Wed, 21 Aug 2019 00:09:00 +0100 Subject: bpf: sync bpf.h to tools/ Fix a 'struct pt_reg' typo and clarify when bpf_trace_printk discards lines. Affects documentation only. Signed-off-by: Peter Wu Signed-off-by: Alexei Starovoitov --- tools/include/uapi/linux/bpf.h | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) (limited to 'tools') diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index 8aa6126f0b6e..b5889257cc33 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -580,6 +580,8 @@ union bpf_attr { * limited to five). * * Each time the helper is called, it appends a line to the trace. + * Lines are discarded while *\/sys/kernel/debug/tracing/trace* is + * open, use *\/sys/kernel/debug/tracing/trace_pipe* to avoid this. * The format of the trace is customizable, and the exact output * one will get depends on the options set in * *\/sys/kernel/debug/tracing/trace_options* (see also the @@ -1018,7 +1020,7 @@ union bpf_attr { * The realm of the route for the packet associated to *skb*, or 0 * if none was found. * - * int bpf_perf_event_output(struct pt_reg *ctx, struct bpf_map *map, u64 flags, void *data, u64 size) + * int bpf_perf_event_output(struct pt_regs *ctx, struct bpf_map *map, u64 flags, void *data, u64 size) * Description * Write raw *data* blob into a special BPF perf event held by * *map* of type **BPF_MAP_TYPE_PERF_EVENT_ARRAY**. This perf @@ -1080,7 +1082,7 @@ union bpf_attr { * Return * 0 on success, or a negative error in case of failure. * - * int bpf_get_stackid(struct pt_reg *ctx, struct bpf_map *map, u64 flags) + * int bpf_get_stackid(struct pt_regs *ctx, struct bpf_map *map, u64 flags) * Description * Walk a user or a kernel stack and return its id. To achieve * this, the helper needs *ctx*, which is a pointer to the context @@ -1729,7 +1731,7 @@ union bpf_attr { * Return * 0 on success, or a negative error in case of failure. * - * int bpf_override_return(struct pt_reg *regs, u64 rc) + * int bpf_override_return(struct pt_regs *regs, u64 rc) * Description * Used for error injection, this helper uses kprobes to override * the return value of the probed function, and to set it to *rc*. -- cgit v1.2.3