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Helper Function 'bpf_copy_from_user_task' |
This page documents the 'bpf_copy_from_user_task' eBPF helper function, including its defintion, usage, program types that can use it, and examples. |
Copyright (c) 2015 The Libbpf Authors. All rights reserved.
Read size bytes from user space address user_ptr in tsk's address space, and stores the data in dst. flags is not used yet and is provided for future extensibility. This helper can only be used by sleepable programs.
0 on success, or a negative error in case of failure. On error dst buffer is zeroed out.
#!c static long (* const bpf_copy_from_user_task)(void *dst, __u32 size, const void *user_ptr, struct task_struct *tsk, __u64 flags) = (void *) 191;
!!! 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_KPROBE
- BPF_PROG_TYPE_LSM
- BPF_PROG_TYPE_PERF_EVENT
- BPF_PROG_TYPE_RAW_TRACEPOINT
- BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE
- 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