struct bpf_program bpf_filter;//过滤规则char bpf_filter_string[]="";bpf_u_int32 net_mask;//网络掩码bpf_u_int32 net_ip;//网络地址net_interface=pcap_lookupdev(error_content);//获得网络接口pcap_lookupnet(net_interface,&net_ip,&ne
bpf中可以通过bpf_core_read获取结构体成员,所以通过task_struct是否可以逐步获取cgroup目录?答案是可以间接获取,无法直接获取。 bpf中通过task_struct可以获取到对应subgroup的knid,但是通过knid找到目录需要用户态来获取。 查找方法: 1)task_struct->cgroups->subsys[CGROUP_SUBSYS_COUNT]->cgroup->kn->id.id ...
bpf prog 可以通过 bpf_spin_lock / bpf_spin_unlock 访问 struct bpf_spin_lock 。 不允许读写 struct bpf_spin_lock lock; 属性。 为了使用 bpf_spin_lock 帮助函数,map value 的 BTF 信息必须是一个 struct,而且 struct bpf_spin_lock anyname; 属性需要在最外层。不允许将 bpf_spin_lock 内嵌到其它 ...
(CONFIG_NF_TABLES_MODULE) struct netns_nftables nft; #endif #endif #ifdef CONFIG_WEXT_CORE struct sk_buff_head wext_nlevents; #endif struct net_generic __rcu *gen; /* Used to store attached BPF programs */ struct netns_bpf bpf; /* Note : following structs are cache line aligned */...
Structure that keeps a single BPF instuction; it is repeated 'ninsn' times according to the 'rpcap_filterbpf' header. More... #include <pcap-remote.h> Data Fields uint16code opcode of the instuction uint8jt relative offset to jump to in case of 'true' ...
442 445 * fexit = a set of program to run after original function 443 446 */ 444 - int arch_prepare_bpf_trampoline(void *image, struct btf_func_model *m, u32 flags, 447 + int arch_prepare_bpf_trampoline(void *image, void *image_end, 448 + const struct btf_func_model *m...
{{type}}.IPIngressFilterPath, config_parse_ip_filter_bpf_progs, 0, offsetof({{type}}, cgroup_context.ip_filters_ingress) {{type}}.IPEgressFilterPath, config_parse_ip_filter_bpf_progs, 0, offsetof({{type}}, cgroup_context.ip_filters_egress) {{type}}.ManagedOOMSwap, config_parse_manage...
Pointer to the event on which the read calls on this instance must wait. PUCHARbpfprogram UINTMinToCopy LARGE_INTEGERTimeOut intmode Working mode of the driver. See PacketSetMode() for details. LARGE_INTEGERNbytes Amount of bytes accepted by the filter when this instance is in statistical mode...
因为无法充分检查 kprobe bpf prog 的抢占情况,所以目前不允许在 kprobe 里使用 spinlock 。 当前,以下 bpf prog 类型都不允许使用 spinlock 。 BPF_PROG_TYPE_SOCKET_FILTER BPF_PROG_TYPE_KPROBE BPF_PROG_TYPE_TRACEPOINT BPF_PROG_TYPE_PERF_EVENT
* This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in ...