bcc/tools/vfscount.c at yhs_dev · dqminh/bcc

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* vfscount.c Count some VFS calls.

* For Linux, uses BCC, eBPF. See the Python front-end.

* USAGE: vfscount.py

* This program is free software; you can redistribute it and/or

* modify it under the terms of version 2 of the GNU General Public

* License as published by the Free Software Foundation.

* 14-Aug-2015 Brendan Gregg Created this.

#include <uapi/linux/ptrace.h>

struct key_t {

u64 ip;

};

BPF_TABLE("hash", struct key_t, u64, counts, 256);

int do_count(struct pt_regs *ctx) {

struct key_t key = {};

u64 zero = 0, *val;

key.ip = ctx->ip;

val = counts.lookup_or_init(&key, &zero);

(*val)++;

return 0;

}