这些宏的定义有一定的规律,例如对Socket进行操作的宏都以'S'开头, //<include/linux/sockios.h>0x0000890BSIOCADDRTconststructrtentry *//MORE0x0000890CSIOCDELRTconststructrtentry *//MORE0x00008910SIOCGIFNAMEchar[]0x00008911SIOCSIFLINKvoid0x00008912SIOCGIFCONFstructifconf *//MORE//I-O0x00008913SIOCGIFFLAG...
struct udp_tunnel_nic *udp_tunnel_nic; /* protected by rtnl_lock */ struct bpf_xdp_entity xdp_state[__MAX_XDP_MODE]; u8 dev_addr_shadow[MAX_ADDR_LEN]; netdevice_tracker linkwatch_dev_tracker; netdevice_tracker watchdog_dev_tracker; netdevice_tracker dev_registered_tracker; struct rtnl_hw...
sizeof(e->filename), (void *)ctx + fname_off); /* successfully submit it to user-space for post-processing */ bpf_ringbuf_submit(e, 0);//将填充的event提交到BPF缓冲区,以供用户空间进行后续处理 return 0; } /*这段代码似乎是BPF跟踪程序的一部分,用于捕获和记录有关进程执行的信息,并将...
I am using ubuntu 22.04.2 with the intel ice driver v 1.11.14 downloaded from intel.com When using an XDP redirect based bpf program, I noticed
struct block *link; /* link field used by optimizer */ uset dom; // uset的定义 typedef bpf_u_int32 *uset; uset closure; struct edge *in_edges; atomset def, kill; // typedef bpf_u_int32 *uset; 定义 atomset in_use;
.ndo_bpf = veth_xdp, .ndo_xdp_xmit = veth_ndo_xdp_xmit, .ndo_get_peer_dev = veth_peer_dev, }; 从上面的定义我们可以看到几个语义很直观的方法:ndo_start_xmit 用于发送数据包,newlink 用于创建一个新的设备。 对于接收数据包,Linux 的收包动作并不是由各个进程自己去完成的,而是由 ksoftirqd 内...
/** 'ptraced' is the list of tasks this task is using ptrace on.** This includes both natural children and PTRACE_ATTACH targets.* 'ptrace_entry' is this task's link on the p->parent->ptraced list.*/structlist_headptraced;structlist_headptrace_entry; ...
The patch introduces BPF_MAP_TYPE_STRUCT_OPS. The map value is a kernel struct with its func ptr implemented in bpf prog. This new map is the interface to register/unregister/introspect a bpf implemented kernel struct. The kernel struct is actually embedded inside another new struct (or calle...
fd = bpf_prog_get_fd_by_id(id); @@ -1671,17 +1701,23 @@ static struct xdp_multiprog *xdp_multiprog__from_id(__u32 id, int ifindex) pr_warn("couldn't get program fd: %s", strerror(-err)); return ERR_PTR(err); } mp = xdp_multiprog__from_fd(fd, ifindex);...
内容概要:本文讨论了BPF(Berkeley Packet Filter)中struct_ops的功能及其在内核操作接口中的应用,重点介绍struct_ops允许BPF程序为内核实施特定操作。文档还深入探讨了kfunc(kernel functions)在不同struct_ops回调中调用的安全性和局限性。作者提出了一种支持将kfunc权限限制于具体struct_ops回调的方法,并讨论了用于追踪...