kernel subsystem is allowing eBPF programs to call this function, * inside its own verifier_ops->get_func_proto() callback it should return * bpf_map_lookup_elem_proto, so that verifier can properly check the arguments * * Different map implementations will rely on rcu in map methods ...
/* If we're handed a bigger struct than we know of,* ensure all the unknown bits are 0 - i.e. new* user-space does not rely on any kernel feature* extensions we dont know about yet.*/if (size > sizeof(attr)) {unsigned char __user *addr;unsigned char __user *end;unsigned c...
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if (unlikely(uaccess_kernel())) return -EPERM; if (unlikely(!nmi_uaccess_okay())) return -EPERM; /* Task should not be pid=1 to avoid kernel panic. */ if (unlikely(is_global_init(current))) return -EPERM; if (irqs_disabled()) { /* Do an early check ...
1.1.3、bpf JIT/kernel interpreter 1.1.4、fd分配 1.2、bpf map操作 1.2.1、map的创建 1.2.2、map的查找 1.2.3、BPF_FUNC_map_lookup_elem 1.3、objpin 1.3.1、bpf_obj_pin() 1.3.2、bpf_obj_get() 2、Tracing类型的BPF程序 2.1、bpf程序的绑定 ...
1.1.1、bpf内存空间分配1.1.2、bpf verifier1.1.3、bpf JIT/kernel interpreter1.1.4、fd分配1.2、bpf map操作1.2.1、map的创建1.2.2、map的查找1.2.3、BPF_FUNC_map_lookup_elem1.3、obj pin1.3.1、bpf_obj_pin()1.3.2、bpf_obj_get() 2、Tracing类型的BPF程序 2.1、bpf程序的绑定2.2、bpf程序的执行 ...
1.1.3、bpf JIT/kernel interpreter 1.1.4、fd分配 1.2、bpf map操作 1.2.1、map的创建 1.2.2、map的查找 1.2.3、BPF_FUNC_map_lookup_elem 1.3、obj pin 1.3.1、bpf_obj_pin() 1.3.2、bpf_obj_get() 2、Tracing类型的BPF程序 2.1、bpf程序的绑定 ...
kernel / trace / bpf_trace.c v6 v5 v4 v4.20 v4.19 v4.18 v4.17 v4.16 v4.15 v4.15.18 v4.15.17 v4.15.16 v4.15.15 v4.15.14 v4.15.13 v4.15.12 v4.15.11 v4.15.10 v4.15.9 v4.15.8 v4.15.7 v4.15.6 v4.15.5 v4.15.4 v4.15.3 v4.15.2 v4.15.1 ...
Elixir Cross Referencer - Explore source code in your browser - Particularly useful for the Linux kernel and other low-level projects in C/C++ (bootloaders, C libraries...)
BPF的字面上意思Berkeley Packet Filter意味着它是从包过滤而来。如果在开始前对BPF缺乏感性的认识建议先看一下参考文档:“3.1、Berkeley Packet Filter (BPF) (Kernel Document)”、“3.2、BPF and XDP Reference Guide”。 本质上它是一种内核代码注入的技术: ...