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| name: kvm_watcher | ||
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| on: | ||
| push: | ||
| branches: | ||
| - "*" | ||
| paths: | ||
| - 'eBPF_Supermarket/kvm_watcher/**' | ||
| - '.github/workflows/kvm_watcher.yml' | ||
| pull_request: | ||
| branches: | ||
| - "*" | ||
| paths: | ||
| - 'eBPF_Supermarket/kvm_watcher/**' | ||
| - '.github/workflows/kvm_watcher.yml' | ||
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| jobs: | ||
| kvm_watcher-project-build-and-test: | ||
| runs-on: ubuntu-22.04 | ||
| steps: | ||
| - uses: actions/checkout@v3 | ||
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| - name: Install dependencies | ||
| run: | | ||
| sudo apt install clang libelf1 libelf-dev zlib1g-dev | ||
| sudo apt install libbpf-dev | ||
| sudo apt install linux-tools-$(uname -r) | ||
| sudo apt install linux-cloud-tools-$(uname -r) | ||
| sudo modprobe kvm | ||
| - name: Run kvm_exits | ||
| run: | | ||
| cd eBPF_Supermarket/kvm_watcher/kvm_exits | ||
| make | ||
| sudo ./kvm_exits |
339 changes: 221 additions & 118 deletions
339
eBPF_Supermarket/Network_Subsystem/net_watcher/netwatcher.bpf.c
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| ARCH ?= $(shell uname -m | sed 's/x86_64/x86/' \ | ||
| | sed 's/arm.*/arm/' \ | ||
| | sed 's/aarch64/arm64/' \ | ||
| | sed 's/ppc64le/powerpc/' \ | ||
| | sed 's/mips.*/mips/' \ | ||
| | sed 's/riscv64/riscv/' \ | ||
| | sed 's/loongarch64/loongarch/') | ||
| APP = kvm_exits | ||
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| all: $(APP) | ||
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| .PHONY: $(APP) | ||
| $(APP): | ||
| ifeq ($(wildcard ./vmlinux.h),) | ||
| bpftool btf dump file /sys/kernel/btf/vmlinux format c > vmlinux.h | ||
| endif | ||
| clang -g -O2 -target bpf -D__TARGET_ARCH_$(ARCH) -I/usr/include/x86_64-linux-gnu -I. -c [email protected] -o [email protected] | ||
| bpftool gen skeleton [email protected] > [email protected] | ||
| clang -g -O2 -Wall -I . -c [email protected] -o [email protected] | ||
| clang -Wall -O2 -g [email protected] -static -lbpf -lelf -lz -o $@ | ||
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| clean: | ||
| rm -f *.o *.skel.h $(APP) |
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| // Copyright 2023 The LMP Authors. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // https://github.com/linuxkerneltravel/lmp/blob/develop/LICENSE | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
| // | ||
| // author: [email protected] | ||
| // | ||
| // Kernel space BPF program used for counting VM exit reason. | ||
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| #include "vmlinux.h" | ||
| #include "kvm_exits.h" | ||
| #include <bpf/bpf_helpers.h> | ||
| #include <bpf/bpf_core_read.h> | ||
| #include <bpf/bpf_tracing.h> | ||
| char LICENSE[] SEC("license") = "Dual BSD/GPL"; | ||
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| struct { | ||
| __uint(type, BPF_MAP_TYPE_HASH); | ||
| __uint(max_entries, 8192); | ||
| __type(key, pid_t); | ||
| __type(value, struct reason_info); | ||
| } times SEC(".maps"); | ||
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| struct { | ||
| __uint(type, BPF_MAP_TYPE_HASH); | ||
| __uint(max_entries, 8192); | ||
| __type(key, u32); | ||
| __type(value, u32); | ||
| } counts SEC(".maps"); | ||
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| struct { | ||
| __uint(type, BPF_MAP_TYPE_RINGBUF); | ||
| __uint(max_entries, 256 * 1024); | ||
| } rb SEC(".maps"); | ||
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| struct exit{ | ||
| u64 pad; | ||
| unsigned int exit_reason; | ||
| unsigned long guest_rip; | ||
| u32 isa; | ||
| u64 info1; | ||
| u64 info2; | ||
| u32 intr_info; | ||
| u32 error_code; | ||
| unsigned int vcpu_id; | ||
| }; | ||
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| int total=0; | ||
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| SEC("tp/kvm/kvm_exit") | ||
| int handle_kvm_exit(struct exit *ctx) | ||
| { | ||
| pid_t tid; | ||
| u64 id,ts; | ||
| id = bpf_get_current_pid_tgid(); | ||
| tid = (u32)id; | ||
| ts = bpf_ktime_get_ns(); | ||
| u32 reason; | ||
| reason=(u32)ctx->exit_reason; | ||
| struct reason_info reas={}; | ||
| reas.reason=reason; | ||
| reas.time=ts; | ||
| u32 *count; | ||
| count=bpf_map_lookup_elem(&counts, &reason); | ||
| if(count){ | ||
| (*count)++; | ||
| reas.count=*count; | ||
| }else{ | ||
| u32 new_count = 1; | ||
| reas.count=new_count; | ||
| bpf_map_update_elem(&counts, &reason, &new_count, BPF_ANY); | ||
| } | ||
| bpf_map_update_elem(×, &tid, &reas, BPF_ANY); | ||
| return 0; | ||
| } | ||
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| SEC("tp/kvm/kvm_entry") | ||
| int handle_kvm_entry() | ||
| { | ||
| struct reason_info *reas; | ||
| pid_t pid, tid; | ||
| u64 id, ts, *start_ts, duration_ns=0; | ||
| id = bpf_get_current_pid_tgid(); | ||
| pid = id >> 32; | ||
| tid = (u32)id; | ||
| reas = bpf_map_lookup_elem(×, &tid); | ||
| if(reas){ | ||
| u32 reason; | ||
| struct event *e; | ||
| int count=0; | ||
| duration_ns=bpf_ktime_get_ns() - reas->time; | ||
| bpf_map_delete_elem(×, &tid); | ||
| reason=reas->reason; | ||
| count=reas->count; | ||
| e = bpf_ringbuf_reserve(&rb, sizeof(*e), 0); | ||
| if (!e){ | ||
| return 0; | ||
| } | ||
| e->reason_number=reason; | ||
| e->pid=pid; | ||
| e->duration_ns = duration_ns; | ||
| bpf_get_current_comm(&e->comm, sizeof(e->comm)); | ||
| e->tid=tid; | ||
| e->total=++total; | ||
| if (count) { | ||
| e->count = count; | ||
| } else { | ||
| e->count = 1; | ||
| } | ||
| bpf_ringbuf_submit(e, 0); | ||
| return 0; | ||
| } | ||
| else{ | ||
| return 0; | ||
| } | ||
| } | ||
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