blob: 5fc1cb20c6c852d0f3448430a6850bf40b1dc87e [file] [log] [blame]
/*
* blktrace output analysis: generate a timeline & gather statistics
*
* Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <stdio.h>
#include "globals.h"
struct devmap {
struct list_head head;
char device[PATH_MAX], devno[PATH_MAX];
};
LIST_HEAD(all_devmaps);
static int dev_map_add(char *line)
{
struct devmap *dmp;
if (strstr(line, "Device") != NULL)
return 1;
dmp = malloc(sizeof(struct devmap));
if (sscanf(line, "%s %s", dmp->device, dmp->devno) != 2) {
free(dmp);
return 1;
}
list_add_tail(&dmp->head, &all_devmaps);
return 0;
}
char *dev_map_find(__u32 device)
{
char this[128];
struct list_head *p;
sprintf(this, "%u,%u", MAJOR(device), MINOR(device));
__list_for_each(p, &all_devmaps) {
struct devmap *dmp = list_entry(p, struct devmap, head);
if (!strcmp(this, dmp->devno))
return dmp->device;
}
return NULL;
}
int dev_map_read(char *fname)
{
char line[256];
FILE *fp = my_fopen(fname, "r");
if (!fp) {
perror(fname);
return 1;
}
while (fscanf(fp, "%255[a-zA-Z0-9 :.,/_-]\n", line) == 1) {
if (dev_map_add(line))
break;
}
fclose(fp);
return 0;
}
void dev_map_exit(void)
{
struct list_head *p, *q;
list_for_each_safe(p, q, &all_devmaps) {
struct devmap *dmp = list_entry(p, struct devmap, head);
list_del(&dmp->head);
free(dmp);
}
}