Helper function bpf_ringbuf_reserve_dynptr
Definition
Copyright (c) 2015 The Libbpf Authors. All rights reserved.
Reserve size bytes of payload in a ring buffer ringbuf through the dynptr interface. flags must be 0.
Please note that a corresponding bpf_ringbuf_submit_dynptr or bpf_ringbuf_discard_dynptr must be called on ptr, even if the reservation fails. This is enforced by the verifier.
Returns
0 on success, or a negative error in case of failure.
static long (* const bpf_ringbuf_reserve_dynptr)(void *ringbuf, __u32 size, __u64 flags, struct bpf_dynptr *ptr) = (void *) 198;
Usage
Docs could be improved
This part of the docs is incomplete, contributions are very welcome
Program types
This helper call can be used in the following program types:
- BPF_PROG_TYPE_CGROUP_SOCK
- BPF_PROG_TYPE_CGROUP_SOCK_ADDR
- BPF_PROG_TYPE_KPROBE
- BPF_PROG_TYPE_LSM
- BPF_PROG_TYPE_PERF_EVENT
- BPF_PROG_TYPE_RAW_TRACEPOINT
- BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE
- BPF_PROG_TYPE_SK_MSG
- BPF_PROG_TYPE_SYSCALL
- BPF_PROG_TYPE_TRACEPOINT
- BPF_PROG_TYPE_TRACING
Example
Docs could be improved
This part of the docs is incomplete, contributions are very welcome