1/*-
2 * Copyright (c) 2002 Poul-Henning Kamp
3 * Copyright (c) 2002 Networks Associates Technology, Inc.
4 * All rights reserved.
5 *
6 * This software was developed for the FreeBSD Project by Poul-Henning Kamp
7 * and NAI Labs, the Security Research Division of Network Associates, Inc.
8 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the

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27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * $FreeBSD: head/sys/geom/geom_mbr.c 93776 2002-04-04 09:54:13Z phk $
36 */
37
38#include <sys/param.h>
39#ifndef _KERNEL
40#include <stdio.h>
41#include <string.h>
42#include <signal.h>
43#include <sys/param.h>

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164}
165
166static struct g_geom *
167g_mbr_taste(struct g_class *mp, struct g_provider *pp, int insist)
168{
169 struct g_geom *gp;
170 struct g_consumer *cp;
171 struct g_provider *pp2;
172 int error, i, j, npart;
173 struct dos_partition dp[NDOSPART];
174 struct g_mbr_softc *ms;
175 u_char *buf;
176
177 if (sizeof(struct dos_partition) != 16) {
178 printf("WARNING: struct dos_partition compiles to %d bytes, should be 16.\n",
179 (int)sizeof(struct dos_partition));
180 return (NULL);
181 }
182 g_trace(G_T_TOPOLOGY, "mbr_taste(%s,%s)", mp->name, pp->name);
183 g_topology_assert();
184 gp = g_slice_new(mp, NDOSPART, pp, &cp, &ms, sizeof *ms, g_mbr_start);
185 if (gp == NULL)
186 return (NULL);
187 g_topology_unlock();
188 gp->dumpconf = g_mbr_dumpconf;
189 npart = 0;
190 while (1) { /* a trick to allow us to use break */
191 if (gp->rank != 2 && insist == 0)
192 break;
193 j = sizeof i;
194 /* For now we only support 512 bytes sectors */
195 error = g_io_getattr("GEOM::sectorsize", cp, &j, &i);
196 if (!error && i != 512)
197 break;
198 buf = g_read_data(cp, 0, 512, &error);
199 if (buf == NULL || error != 0)
200 break;
201 if (buf[0x1fe] != 0x55 && buf[0x1ff] != 0xaa) {
202 g_free(buf);
203 break;
204 }
205 for (i = 0; i < NDOSPART; i++)
206 g_dec_dos_partition(

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302}
303
304static struct g_geom *
305g_mbrext_taste(struct g_class *mp, struct g_provider *pp, int insist __unused)
306{
307 struct g_geom *gp;
308 struct g_consumer *cp;
309 struct g_provider *pp2;
310 int error, i, j, slice;
311 struct g_mbrext_softc *ms;
312 off_t off;
313 u_char *buf;
314 struct dos_partition dp[4];
315
316 g_trace(G_T_TOPOLOGY, "g_mbrext_taste(%s,%s)", mp->name, pp->name);
317 g_topology_assert();
318 if (strcmp(pp->geom->class->name, MBR_CLASS_NAME))
319 return (NULL);
320 gp = g_slice_new(mp, NDOSEXTPART, pp, &cp, &ms, sizeof *ms, g_mbrext_start);
321 if (gp == NULL)
322 return (NULL);
323 g_topology_unlock();
324 gp->dumpconf = g_mbrext_dumpconf;
325 off = 0;
326 slice = 0;
327 while (1) { /* a trick to allow us to use break */
328 j = sizeof i;
329 error = g_io_getattr("MBR::type", cp, &j, &i);
330 if (error || i != DOSPTYP_EXT)
331 break;
332 for (;;) {
333 buf = g_read_data(cp, off, DEV_BSIZE, &error);
334 if (buf == NULL || error != 0)
335 break;
336 if (buf[0x1fe] != 0x55 && buf[0x1ff] != 0xaa)
337 break;
338 for (i = 0; i < NDOSPART; i++)
339 g_dec_dos_partition(
340 buf + DOSPARTOFF + i * sizeof(struct dos_partition),
341 dp + i);

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