mirror of
https://git.proxmox.com/git/mirror_iproute2
synced 2025-10-04 23:05:29 +00:00
6256f8c9e4
This work finalizes both eBPF front-ends for the classifier and action part in tc, it allows for custom ELF section selection, a simplified tc command frontend (while keeping compat), reusing of common maps between classifier and actions residing in the same object file, and exporting of all map fds to an eBPF agent for handing off further control in user space. It also adds an extensive example of how eBPF can be used, and a minimal self-contained example agent that dumps map data. The example is well documented and hopefully provides a good starting point into programming cls_bpf and act_bpf. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jiri Pirko <jiri@resnulli.us> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Thomas Graf <tgraf@suug.ch> Acked-by: Jiri Pirko <jiri@resnulli.us> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
24 lines
462 B
C
24 lines
462 B
C
#ifndef __BPF_SYS__
|
|
#define __BPF_SYS__
|
|
|
|
#include <sys/syscall.h>
|
|
#include <linux/bpf.h>
|
|
|
|
static inline __u64 bpf_ptr_to_u64(const void *ptr)
|
|
{
|
|
return (__u64) (unsigned long) ptr;
|
|
}
|
|
|
|
static inline int bpf_lookup_elem(int fd, void *key, void *value)
|
|
{
|
|
union bpf_attr attr = {
|
|
.map_fd = fd,
|
|
.key = bpf_ptr_to_u64(key),
|
|
.value = bpf_ptr_to_u64(value),
|
|
};
|
|
|
|
return syscall(__NR_bpf, BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));
|
|
}
|
|
|
|
#endif /* __BPF_SYS__ */
|