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

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* vfsstat.c Count some VFS calls.

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

* USAGE: vfsstat.py [interval [count]]

* 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>

enum stat_types {

S_READ = 1,

S_WRITE,

S_FSYNC,

S_OPEN,

S_CREATE,

S_MAXSTAT

};

BPF_TABLE("array", int, u64, stats, S_MAXSTAT + 1);

void stats_increment(int key) {

u64 *leaf = stats.lookup(&key);

if (leaf) (*leaf)++;

}

void do_read(struct pt_regs *ctx) { stats_increment(S_READ); }

void do_write(struct pt_regs *ctx) { stats_increment(S_WRITE); }

void do_fsync(struct pt_regs *ctx) { stats_increment(S_FSYNC); }

void do_open(struct pt_regs *ctx) { stats_increment(S_OPEN); }

void do_create(struct pt_regs *ctx) { stats_increment(S_CREATE); }