diff options
Diffstat (limited to 'include/uapi/linux')
| -rw-r--r-- | include/uapi/linux/bpf.h | 59 |
1 files changed, 55 insertions, 4 deletions
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index 793103b10eab..3075018a4ef8 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -110,6 +110,12 @@ union bpf_iter_link_info { __u32 cgroup_fd; __u64 cgroup_id; } cgroup; + /* Parameters of task iterators. */ + struct { + __u32 tid; + __u32 pid; + __u32 pid_fd; + } task; }; /* BPF syscall commands, see bpf(2) man-page for more details. */ @@ -928,6 +934,7 @@ enum bpf_map_type { BPF_MAP_TYPE_INODE_STORAGE, BPF_MAP_TYPE_TASK_STORAGE, BPF_MAP_TYPE_BLOOM_FILTER, + BPF_MAP_TYPE_USER_RINGBUF, }; /* Note that tracing related programs such as @@ -4950,6 +4957,7 @@ union bpf_attr { * Get address of the traced function (for tracing and kprobe programs). * Return * Address of the traced function. + * 0 for kprobes placed within the function (not at the entry). * * u64 bpf_get_attach_cookie(void *ctx) * Description @@ -5079,12 +5087,12 @@ union bpf_attr { * * long bpf_get_func_arg(void *ctx, u32 n, u64 *value) * Description - * Get **n**-th argument (zero based) of the traced function (for tracing programs) + * Get **n**-th argument register (zero based) of the traced function (for tracing programs) * returned in **value**. * * Return * 0 on success. - * **-EINVAL** if n >= arguments count of traced function. + * **-EINVAL** if n >= argument register count of traced function. * * long bpf_get_func_ret(void *ctx, u64 *value) * Description @@ -5097,10 +5105,11 @@ union bpf_attr { * * long bpf_get_func_arg_cnt(void *ctx) * Description - * Get number of arguments of the traced function (for tracing programs). + * Get number of registers of the traced function (for tracing programs) where + * function arguments are stored in these registers. * * Return - * The number of arguments of the traced function. + * The number of argument registers of the traced function. * * int bpf_get_retval(void) * Description @@ -5386,6 +5395,43 @@ union bpf_attr { * Return * Current *ktime*. * + * long bpf_user_ringbuf_drain(struct bpf_map *map, void *callback_fn, void *ctx, u64 flags) + * Description + * Drain samples from the specified user ring buffer, and invoke + * the provided callback for each such sample: + * + * long (\*callback_fn)(struct bpf_dynptr \*dynptr, void \*ctx); + * + * If **callback_fn** returns 0, the helper will continue to try + * and drain the next sample, up to a maximum of + * BPF_MAX_USER_RINGBUF_SAMPLES samples. If the return value is 1, + * the helper will skip the rest of the samples and return. Other + * return values are not used now, and will be rejected by the + * verifier. + * Return + * The number of drained samples if no error was encountered while + * draining samples, or 0 if no samples were present in the ring + * buffer. If a user-space producer was epoll-waiting on this map, + * and at least one sample was drained, they will receive an event + * notification notifying them of available space in the ring + * buffer. If the BPF_RB_NO_WAKEUP flag is passed to this + * function, no wakeup notification will be sent. If the + * BPF_RB_FORCE_WAKEUP flag is passed, a wakeup notification will + * be sent even if no sample was drained. + * + * On failure, the returned value is one of the following: + * + * **-EBUSY** if the ring buffer is contended, and another calling + * context was concurrently draining the ring buffer. + * + * **-EINVAL** if user-space is not properly tracking the ring + * buffer due to the producer position not being aligned to 8 + * bytes, a sample not being aligned to 8 bytes, or the producer + * position not matching the advertised length of a sample. + * + * **-E2BIG** if user-space has tried to publish a sample which is + * larger than the size of the ring buffer, or which cannot fit + * within a struct bpf_dynptr. */ #define __BPF_FUNC_MAPPER(FN) \ FN(unspec), \ @@ -5597,6 +5643,7 @@ union bpf_attr { FN(tcp_raw_check_syncookie_ipv4), \ FN(tcp_raw_check_syncookie_ipv6), \ FN(ktime_get_tai_ns), \ + FN(user_ringbuf_drain), \ /* */ /* integer value in 'imm' field of BPF_CALL instruction selects which helper @@ -6218,6 +6265,10 @@ struct bpf_link_info { __u64 cgroup_id; __u32 order; } cgroup; + struct { + __u32 tid; + __u32 pid; + } task; }; } iter; struct { |