| title | description |
|---|---|
Helper Function 'bpf_timer_cancel' |
This page documents the 'bpf_timer_cancel' eBPF helper function, including its defintion, usage, program types that can use it, and examples. |
This helper cancels a pending timer.
Copyright (c) 2015 The Libbpf Authors. All rights reserved.
Cancel the timer and wait for callback_fn to finish if it was running.
0 if the timer was not active. 1 if the timer was active. -EINVAL if timer was not initialized with bpf_timer_init() earlier. -EDEADLK if callback_fn tried to call bpf_timer_cancel() on its own timer which would have led to a deadlock otherwise.
#!c static long (* const bpf_timer_cancel)(struct bpf_timer *timer) = (void *) 172;
!!! example "Docs could be improved" This part of the docs is incomplete, contributions are very welcome
This helper call can be used in the following program types:
- BPF_PROG_TYPE_CGROUP_DEVICE
- BPF_PROG_TYPE_CGROUP_SKB
- BPF_PROG_TYPE_CGROUP_SOCK
- BPF_PROG_TYPE_CGROUP_SOCKOPT
- BPF_PROG_TYPE_CGROUP_SOCK_ADDR
- BPF_PROG_TYPE_CGROUP_SYSCTL
- BPF_PROG_TYPE_FLOW_DISSECTOR
- BPF_PROG_TYPE_LSM
- BPF_PROG_TYPE_LWT_IN
- BPF_PROG_TYPE_LWT_OUT
- BPF_PROG_TYPE_LWT_SEG6LOCAL
- BPF_PROG_TYPE_LWT_XMIT
- BPF_PROG_TYPE_SCHED_ACT
- BPF_PROG_TYPE_SCHED_CLS
- BPF_PROG_TYPE_SK_LOOKUP
- BPF_PROG_TYPE_SK_MSG
- BPF_PROG_TYPE_SK_REUSEPORT
- BPF_PROG_TYPE_SK_SKB
- BPF_PROG_TYPE_SOCKET_FILTER
- BPF_PROG_TYPE_SOCK_OPS
- BPF_PROG_TYPE_SYSCALL
- BPF_PROG_TYPE_TRACING
- BPF_PROG_TYPE_XDP
!!! example "Docs could be improved" This part of the docs is incomplete, contributions are very welcome