在执行bpf_tail_call之前,打印before tail_call handle_udp 在bpf_tail_call调用函数handle_udp函数中,打印new udp packet captured (XDP) 在执行bpf_tail_call之后,打印after tail_call handle_udp 按照bpf_tail_call特性,如果bpf_tail_call执行成功,对应的eBPF程序将会执行并替换当前栈帧(当前eBPF的函数体就不再...
bpf_tail_call_static(skb, &jmp_table, PARSE_VLAN); bpf_tail_call(skb, &jmp_table, PARSE_VLAN); break; case ETH_P_MPLS_UC: case ETH_P_MPLS_MC: bpf_tail_call_static(skb, &jmp_table, PARSE_MPLS); bpf_tail_call(skb, &jmp_table, PARSE_MPLS); break; case ETH_P_IP: bpf_tail...
tailcall 目标 bpf prog 复用当前 subprog 的栈空间,而不是 subprog caller 的栈空间。 subprog caller 能获取到 tailcall 目标 bpf prog 的返回值。 tailcall in bpf2bpf 支持情况 从5.10 内核开始,x86 架构里 bpf2bpf 支持了 tailcall 特性,即在 bpf2bpf 调用链中,可以通过 tailcall 调用另一个 eBPF ...
bpf_tail_call_static(skb,&jmp_table,PARSE_IPV6); bpf_tail_call(skb,&jmp_table,PARSE_IPV6); break; } } Expand Down 2 changes: 2 additions & 0 deletions2tools/lib/bpf/bpf_helpers.h Original file line numberDiff line numberDiff line change ...
bpf(BPF_MAP_CREATE, {map_type=BPF_MAP_TYPE_PERF_EVENT_ARRAY, , key_size=4, value_size=4, max_entries=4, ... map_name="output", ...}, 128) = 4 You can probably guess from the command name BPF_MAP_CREATE that this call creates an eBPF map. You can see that the type of ...
Presentation of vessel SHI ZI ZUO built in 2005 (19 years old) of type Crude Oil Tanker currently sailing under the flag of China with IMO number 9303704, MMSI number 413137000. She is under the call sign BPFR. Find more about size, dwt, dimensions, curr
bpf_jit_emit_func_call_rel() to simplify bpf function call JIT code. We don't actually need to load/restore TOC across a call out to a different kernel helper or to a different bpf program since they all work with the kernel TOC. We only need to do it if we have to call out ...
最近在学习linux内置的沙盒:Seccomp-bpf,资料略少,最后找到了这个网站提供的例子。这个例子我已实验成功,能够正常阻止禁止的系统调用并结束程序,去掉禁止的系统调用后也能正常运行。但是当我尝试用execv运行另外一个程序时却失败了,显示Bad System Call。我已经使用syscall-reporter检查了需要允许的System Call,但是仍旧无...
> > Wiring up uretprobe system call, which comes in following changes. > > We need to do the wiring before, because the uretprobe implementation > > needs the syscall number. > > > > Note at the moment uretprobe syscall is supported only for native ...
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