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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26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: head/sys/geom/geom_mbr.c 119660 2003-09-01 20:45:32Z phk $");
35
36#include <sys/param.h>
37#include <sys/errno.h>
38#include <sys/endian.h>
39#include <sys/systm.h>
40#include <sys/kernel.h>
41#include <sys/malloc.h>
42#include <sys/bio.h>

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147 g_slice_config(gp, i, G_SLICE_CONFIG_SET,
148 (off_t)dp[i].dp_start * ms->sectorsize, l[i],
149 ms->sectorsize, "%ss%d", gp->name, 1 + i);
150 }
151 bcopy(sec0, ms->sec0, 512);
152 return (0);
153}
154
155static int
156g_mbr_ioctl(struct g_provider *pp, u_long cmd, void *data, struct thread *td)
157{
158 struct g_geom *gp;
159 struct g_mbr_softc *ms;
160 struct g_slicer *gsp;
161 struct g_consumer *cp;
162 int error;
163
164 gp = pp->geom;
165 gsp = gp->softc;
166 ms = gsp->softc;
167
168 switch(cmd) {
169 case DIOCSMBR: {
170 DROP_GIANT();
171 g_topology_lock();
172 /* Validate and modify our slicer instance to match. */
173 error = g_mbr_modify(gp, ms, data);
174 cp = LIST_FIRST(&gp->consumer);
175 error = g_write_data(cp, 0, data, 512);
176 g_topology_unlock();
177 PICKUP_GIANT();
178 return(error);
179 }
180 default:
181 return (ENOIOCTL);
182 }
183}
184
185static int
186g_mbr_start(struct bio *bp)
187{
188 struct g_provider *pp;
189 struct g_geom *gp;
190 struct g_mbr_softc *mp;
191 struct g_slicer *gsp;
192 int idx;
193
194 pp = bp->bio_to;
195 idx = pp->index;
196 gp = pp->geom;
197 gsp = gp->softc;
198 mp = gsp->softc;
199 if (bp->bio_cmd == BIO_GETATTR) {
200 if (g_handleattr_int(bp, "MBR::type", mp->type[idx]))
201 return (1);
202 if (g_handleattr_off_t(bp, "MBR::offset",
203 gsp->slices[idx].offset))
204 return (1);
205 }
206
207 return (0);
208}
209
210static void
211g_mbr_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp __unused, struct g_provider *pp)
212{
213 struct g_mbr_softc *mp;
214 struct g_slicer *gsp;
215

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237
238 g_trace(G_T_TOPOLOGY, "mbr_taste(%s,%s)", mp->name, pp->name);
239 g_topology_assert();
240 gp = g_slice_new(mp, NDOSPART, pp, &cp, &ms, sizeof *ms, g_mbr_start);
241 if (gp == NULL)
242 return (NULL);
243 g_topology_unlock();
244 gp->dumpconf = g_mbr_dumpconf;
245 gp->ioctl = g_mbr_ioctl;
246 do {
247 if (gp->rank != 2 && insist == 0)
248 break;
249 error = g_getattr("GEOM::fwsectors", cp, &fwsectors);
250 if (error)
251 fwsectors = 17;
252 sectorsize = cp->provider->sectorsize;
253 if (sectorsize < 512)

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