disk.c revision 8192 
1/*
2 * ----------------------------------------------------------------------------
3 * "THE BEER-WARE LICENSE" (Revision 42):
4 * <phk@login.dknet.dk> wrote this file.  As long as you retain this notice you
5 * can do whatever you want with this stuff. If we meet some day, and you think
6 * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
7 * ----------------------------------------------------------------------------
8 *
9 * $Id: disk.c,v 1.8 1995/04/30 11:04:13 phk Exp $
10 *
11 */
12
13#include <stdio.h>
14#include <stdlib.h>
15#include <unistd.h>
16#include <fcntl.h>
17#include <string.h>
18#include <err.h>
19#include <sys/types.h>
20#include <sys/stat.h>
21#include <sys/ioctl.h>
22#include <sys/disklabel.h>
23#include <sys/diskslice.h>
24#include "libdisk.h"
25
26#define DOSPTYP_EXTENDED        5
27#define DOSPTYP_ONTRACK         84
28
29struct disk *
30Open_Disk(char *name)
31{
32	return Int_Open_Disk(name,0);
33}
34
35struct disk *
36Int_Open_Disk(char *name, u_long size)
37{
38	int i,fd;
39	struct diskslices ds;
40	struct disklabel dl;
41	char device[64];
42	struct disk *d;
43	struct dos_partition *dp;
44	void *p;
45
46	strcpy(device,"/dev/r");
47	strcat(device,name);
48
49	d = (struct disk *)malloc(sizeof *d);
50	if(!d) err(1,"malloc failed");
51	memset(d,0,sizeof *d);
52
53	fd = open(device,O_RDONLY);
54	if (fd < 0) {
55		warn("open(%s) failed",device);
56		return 0;
57	}
58
59	memset(&dl,0,sizeof dl);
60	ioctl(fd,DIOCGDINFO,&dl);
61	i = ioctl(fd,DIOCGSLICEINFO,&ds);
62	if (i < 0) {
63		warn("DIOCGSLICEINFO(%s) failed",device);
64		close(fd);
65		return 0;
66	}
67
68	for(i=0;i<ds.dss_nslices;i++)
69		if(ds.dss_slices[i].ds_openmask)
70			printf("  open(%d)=0x%2x",
71				i,ds.dss_slices[i].ds_openmask);
72	printf("\n");
73
74	if (!size)
75		size = ds.dss_slices[WHOLE_DISK_SLICE].ds_size;
76
77	p = read_block(fd,0);
78	dp = (struct dos_partition*)(p+DOSPARTOFF);
79	for(i=0;i<NDOSPART;i++) {
80		if (dp->dp_start >= size) continue;
81		if (dp->dp_start+dp->dp_size >= size) continue;
82		if (!dp->dp_size) continue;
83
84		if (dp->dp_typ == DOSPTYP_ONTRACK)
85			d->flags |= DISK_ON_TRACK;
86
87	}
88	free(p);
89
90	d->bios_sect = dl.d_nsectors;
91	d->bios_hd = dl.d_ntracks;
92
93	d->name = strdup(name);
94
95
96	if (dl.d_ntracks && dl.d_nsectors)
97		d->bios_cyl = size/(dl.d_ntracks*dl.d_nsectors);
98
99	if (Add_Chunk(d, 0, size, name,whole,0,0))
100		warn("Failed to add 'whole' chunk");
101
102	for(i=BASE_SLICE;i<ds.dss_nslices;i++) {
103		char sname[20];
104		chunk_e ce;
105		u_long flags=0;
106		int subtype=0;
107		if (! ds.dss_slices[i].ds_size)
108			continue;
109		sprintf(sname,"%ss%d",name,i-1);
110		subtype = ds.dss_slices[i].ds_type;
111		switch (ds.dss_slices[i].ds_type) {
112			case 0xa5:
113				ce = freebsd;
114				break;
115			case 0x1:
116			case 0x4:
117				ce = fat;
118				break;
119			case DOSPTYP_EXTENDED:
120				ce = extended;
121				break;
122			default:
123				ce = foo;
124				break;
125		}
126		flags |= CHUNK_ALIGN;
127		if (Add_Chunk(d,ds.dss_slices[i].ds_offset,
128			ds.dss_slices[i].ds_size, sname,ce,subtype,flags))
129			warn("failed to add chunk for slice %d",i - 1);
130
131		if (ds.dss_slices[i].ds_type != 0xa5)
132			continue;
133		{
134		struct disklabel dl;
135		char pname[20];
136		int j,k;
137
138		strcpy(pname,"/dev/r");
139		strcat(pname,sname);
140		j = open(pname,O_RDONLY);
141		if (j < 0) {
142			warn("open(%s)",pname);
143			continue;
144		}
145		k = ioctl(j,DIOCGDINFO,&dl);
146		if (k < 0) {
147			warn("ioctl(%s,DIOCGDINFO)",pname);
148			close(j);
149			continue;
150		}
151		close(j);
152
153		for(j=0; j <= dl.d_npartitions; j++) {
154			if (j == RAW_PART)
155				continue;
156			if (j == 3)
157				continue;
158			if (j == dl.d_npartitions) {
159				j = 3;
160				dl.d_npartitions=0;
161			}
162			if (!dl.d_partitions[j].p_size)
163				continue;
164			if (dl.d_partitions[j].p_size +
165			    dl.d_partitions[j].p_offset >
166			    ds.dss_slices[i].ds_size)
167				continue;
168			sprintf(pname,"%s%c",sname,j+'a');
169			if (Add_Chunk(d,
170				dl.d_partitions[j].p_offset +
171				ds.dss_slices[i].ds_offset,
172				dl.d_partitions[j].p_size,
173				pname,part,
174				dl.d_partitions[j].p_fstype,
175				0) && j != 3)
176				warn(
177			"Failed to add chunk for partition %c [%lu,%lu]",
178			j + 'a',dl.d_partitions[j].p_offset,
179			dl.d_partitions[j].p_size);
180		}
181		}
182	}
183	close(fd);
184	return d;
185}
186
187void
188Debug_Disk(struct disk *d)
189{
190	printf("Debug_Disk(%s)",d->name);
191	printf("  flags=%lx",d->flags);
192	printf("  real_geom=%lu/%lu/%lu",d->real_cyl,d->real_hd,d->real_sect);
193	printf("  bios_geom=%lu/%lu/%lu\n",d->bios_cyl,d->bios_hd,d->bios_sect);
194	printf("  boot1=%p, boot2=%p, bootmgr=%p\n",
195		d->boot1,d->boot2,d->bootmgr);
196	Debug_Chunk(d->chunks);
197}
198
199void
200Free_Disk(struct disk *d)
201{
202	if(d->chunks) Free_Chunk(d->chunks);
203	if(d->name) free(d->name);
204	if(d->bootmgr) free(d->bootmgr);
205	if(d->boot1) free(d->boot1);
206	if(d->boot2) free(d->boot2);
207	free(d);
208}
209
210struct disk *
211Clone_Disk(struct disk *d)
212{
213	struct disk *d2;
214
215	d2 = (struct disk*) malloc(sizeof *d2);
216	if(!d2) err(1,"malloc failed");
217	*d2 = *d;
218	d2->name = strdup(d2->name);
219	d2->chunks = Clone_Chunk(d2->chunks);
220	if(d2->bootmgr) {
221		d2->bootmgr = malloc(DOSPARTOFF);
222		memcpy(d2->bootmgr,d->bootmgr,DOSPARTOFF);
223	}
224	if(d2->boot1) {
225		d2->boot1 = malloc(512);
226		memcpy(d2->boot1,d->boot1,512);
227	}
228	if(d2->boot2) {
229		d2->boot2 = malloc(512*15);
230		memcpy(d2->boot2,d->boot2,512*15);
231	}
232	return d2;
233}
234
235void
236Collapse_Disk(struct disk *d)
237{
238
239	while(Collapse_Chunk(d,d->chunks))
240		;
241}
242
243static char * device_list[] = {"wd","sd",0};
244
245char **
246Disk_Names()
247{
248    int i,j,k;
249    char disk[25];
250    char diskname[25];
251    struct stat st;
252    struct diskslices ds;
253    int fd;
254    static char **disks;
255
256    disks = malloc(sizeof *disks * (1 + MAX_NO_DISKS));
257    memset(disks,0,sizeof *disks * (1 + MAX_NO_DISKS));
258    k = 0;
259	for (j = 0; device_list[j]; j++) {
260		for (i = 0; i < 10; i++) {
261			sprintf(diskname, "%s%d", device_list[j], i);
262			sprintf(disk, "/dev/r%s", diskname);
263			if (stat(disk, &st) || !(st.st_mode & S_IFCHR))
264				continue;
265			if ((fd = open(disk, O_RDWR)) == -1)
266				continue;
267			if (ioctl(fd, DIOCGSLICEINFO, &ds) == -1) {
268				close(fd);
269				continue;
270			}
271			disks[k++] = strdup(diskname);
272			if(k == MAX_NO_DISKS)
273				return disks;
274		}
275	}
276	return disks;
277}
278
279void
280Set_Boot_Mgr(struct disk *d, u_char *b)
281{
282	if (d->bootmgr)
283		free(d->bootmgr);
284	if (!b) {
285		d->bootmgr = 0;
286	} else {
287		d->bootmgr = malloc(DOSPARTOFF);
288		if(!d->bootmgr) err(1,"malloc failed");
289		memcpy(d->bootmgr,b,DOSPARTOFF);
290	}
291}
292
293void
294Set_Boot_Blocks(struct disk *d, u_char *b1, u_char *b2)
295{
296	if (d->boot1) free(d->boot1);
297	d->boot1 = malloc(512);
298	if(!d->boot1) err(1,"malloc failed");
299	memcpy(d->boot1,b1,512);
300	if (d->boot2) free(d->boot2);
301	d->boot2 = malloc(15*512);
302	if(!d->boot2) err(1,"malloc failed");
303	memcpy(d->boot2,b2,15*512);
304}
305