/*

 * 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);

	}

}