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https://github.com/varun-r-mallya/Python-BPF.git
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49 lines
1023 B
Python
49 lines
1023 B
Python
from ctypes import c_int32, c_int64, c_uint64
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from vmlinux import struct_pt_regs, struct_request
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from pythonbpf import bpf, bpfglobal, compile, map, section
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from pythonbpf.helper import ktime
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from pythonbpf.maps import HashMap
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@bpf
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@map
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def start() -> HashMap:
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return HashMap(key=c_uint64, value=c_uint64, max_entries=10240)
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@bpf
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@section("kprobe/blk_mq_end_request")
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def trace_completion(ctx: struct_pt_regs) -> c_int64:
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req_ptr = ctx.di
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req = struct_request(ctx.di)
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data_len = req.__data_len
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cmd_flags = req.cmd_flags
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req_tsp = start.lookup(req_ptr)
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if req_tsp:
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delta = ktime() - req_tsp
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delta_us = delta // 1000
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print(f"{data_len} {cmd_flags:x} {delta_us}\n")
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start.delete(req_ptr)
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return c_int64(0)
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@bpf
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@section("kprobe/blk_mq_start_request")
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def trace_start(ctx1: struct_pt_regs) -> c_int32:
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req = ctx1.di
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ts = ktime()
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start.update(req, ts)
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return c_int32(0)
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@bpf
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@bpfglobal
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def LICENSE() -> str:
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return "GPL"
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compile()
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