trunk/masters-pmf/blk/blktrace_start.c

   1 #include <sys/types.h>
   2 #include <unistd.h>
   3 #include <fcntl.h>
   4 #include <sys/ioctl.h>
   5 #include <string.h>
   6 #include <stdio.h>
   7
   8 #include "blktrace_api.h"
   9
  10 int start(int fd)
  11 {
  12         struct blk_user_trace_setup buts;
  13
  14         memset(&buts, 0, sizeof(buts));
  15 //      buts.buf_size = 512*1024;
  16 //      buts.buf_nr = 4;
  17 //      buts.act_mask = ~0;
  18
  19         if (ioctl(fd, BLKTRACESETUP, &buts) < 0) {
  20                 perror("BLKTRACESETUP");
  21                 return 1;
  22         }
  23
  24         return 0;
  25 }
  26
  27 int stop(int fd)
  28 {
  29         ioctl(fd, BLKTRACESTOP);
  30         if(ioctl(fd, BLKTRACETEARDOWN) < 0)
  31                 perror("BLKTRACETEARDOWN");
  32
  33         return 0;
  34 }
  35
  36 int main(int argc, char **argv)
  37 {
  38         int fd;
  39
  40         if(argc < 3) {
  41                 fprintf(stderr, "usage: --start|--stop %s BLKDEV\n", argv[0]);
  42                 return 1;
  43         }
  44
  45         fd = open(argv[2], O_RDONLY | O_NONBLOCK);
  46         if (fd < 0) {
  47                 perror(argv[0]);
  48                 return 1;
  49         }
  50
  51         if(!strcmp("--start", argv[1]))
  52                 start(fd);
  53         else if(!strcmp("--stop", argv[1]))
  54                 stop(fd);
  55
  56         close(fd);
  57
  58         return 0;
  59 }