1 /*
2 * blktrace output analysis: generate a timeline & gather statistics
3 *
4 * Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21 #include <stdio.h>
22 #include "globals.h"
23
24 struct devmap {
25 struct list_head head;
26 char device[32], devno[32];
27 };
28
29 LIST_HEAD(all_devmaps);
30
dev_map_add(char * line)31 static int dev_map_add(char *line)
32 {
33 struct devmap *dmp;
34
35 if (strstr(line, "Device") != NULL)
36 return 1;
37
38 dmp = malloc(sizeof(struct devmap));
39 if (sscanf(line, "%s %s", dmp->device, dmp->devno) != 2) {
40 free(dmp);
41 return 1;
42 }
43
44 list_add_tail(&dmp->head, &all_devmaps);
45 return 0;
46 }
47
dev_map_find(__u32 device)48 char *dev_map_find(__u32 device)
49 {
50 char this[128];
51 struct list_head *p;
52
53 sprintf(this, "%u,%u", MAJOR(device), MINOR(device));
54 __list_for_each(p, &all_devmaps) {
55 struct devmap *dmp = list_entry(p, struct devmap, head);
56
57 if (!strcmp(this, dmp->devno))
58 return dmp->device;
59 }
60
61 return NULL;
62 }
63
dev_map_read(char * fname)64 int dev_map_read(char *fname)
65 {
66 char line[256];
67 FILE *fp = my_fopen(fname, "r");
68
69 if (!fp) {
70 perror(fname);
71 return 1;
72 }
73
74 while (fscanf(fp, "%255[a-zA-Z0-9 :.,/_-]\n", line) == 1) {
75 if (dev_map_add(line))
76 break;
77 }
78
79 return 0;
80 }
81
dev_map_exit(void)82 void dev_map_exit(void)
83 {
84 struct list_head *p, *q;
85
86 list_for_each_safe(p, q, &all_devmaps) {
87 struct devmap *dmp = list_entry(p, struct devmap, head);
88
89 list_del(&dmp->head);
90 free(dmp);
91 }
92 }
93