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
9 * DARPA CHATS research program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. The names of the authors may not be used to endorse or promote
20 * products derived from this software without specific prior written
21 * permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 *
| 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
9 * DARPA CHATS research program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. The names of the authors may not be used to endorse or promote
20 * products derived from this software without specific prior written
21 * permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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_disk.c 104542 2002-10-05 21:55:31Z phk $
| 35 * $FreeBSD: head/sys/geom/geom_disk.c 104602 2002-10-07 06:25:26Z phk $
|
36 */
37
38#include "opt_geom.h"
39#ifndef NO_GEOM
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/kernel.h>
44#include <sys/sysctl.h>
45#include <sys/bio.h>
46#include <sys/conf.h>
47#include <sys/disk.h>
48#include <sys/diskslice.h>
49#include <sys/disklabel.h>
50#include <sys/malloc.h>
51#include <sys/sysctl.h>
52#include <sys/stdint.h>
53#include <machine/md_var.h>
54
55
56#include <sys/lock.h>
57#include <sys/mutex.h>
58#include <geom/geom.h>
59
60static g_access_t g_disk_access;
61
62struct g_class g_disk_class = {
63 "DISK",
64 NULL,
65 NULL,
66 G_CLASS_INITIALIZER
67};
68
69static int
70g_disk_access(struct g_provider *pp, int r, int w, int e)
71{
72 struct disk *dp;
73 dev_t dev;
74 int error;
75
76 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
77 pp->name, r, w, e);
78 g_topology_assert();
79 r += pp->acr;
80 w += pp->acw;
81 e += pp->ace;
82 dp = pp->geom->softc;
83 dev = dp->d_dev;
84 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
85 mtx_lock(&Giant);
86 error = devsw(dev)->d_open(dev, 3, 0, NULL);
87 if (error != 0)
88 printf("Opened disk %s -> %d\n", pp->name, error);
89 mtx_unlock(&Giant);
90 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
91 mtx_lock(&Giant);
92 error = devsw(dev)->d_close(dev, 3, 0, NULL);
93 if (error != 0)
94 printf("Closed disk %s -> %d\n", pp->name, error);
95 mtx_unlock(&Giant);
96 } else {
97 error = 0;
98 }
99 pp->mediasize = dp->d_mediasize;
100 return (error);
101}
102
103static void
104g_disk_kerneldump(struct bio *bp, struct disk *dp)
105{
106 int error;
107 struct g_kerneldump *gkd;
108 struct dumperinfo di;
109 struct g_geom *gp;
110
111 gkd = (struct g_kerneldump*)bp->bio_data;
112 gp = bp->bio_to->geom;
113 g_trace(G_T_TOPOLOGY, "g_disk_kernedump(%s, %jd, %jd)",
114 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
115 di.dumper = (dumper_t *)dp->d_devsw->d_dump;
116 di.priv = dp->d_dev;
117 di.blocksize = dp->d_sectorsize;
118 di.mediaoffset = gkd->offset;
119 di.mediasize = gkd->length;
120 error = set_dumper(&di);
121 g_io_deliver(bp, error);
122}
123
124static void
125g_disk_done(struct bio *bp)
126{
127
128 mtx_unlock(&Giant);
129 bp->bio_completed = bp->bio_length - bp->bio_resid;
130 g_std_done(bp);
131 mtx_lock(&Giant);
132}
133
134static void
| 36 */
37
38#include "opt_geom.h"
39#ifndef NO_GEOM
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/kernel.h>
44#include <sys/sysctl.h>
45#include <sys/bio.h>
46#include <sys/conf.h>
47#include <sys/disk.h>
48#include <sys/diskslice.h>
49#include <sys/disklabel.h>
50#include <sys/malloc.h>
51#include <sys/sysctl.h>
52#include <sys/stdint.h>
53#include <machine/md_var.h>
54
55
56#include <sys/lock.h>
57#include <sys/mutex.h>
58#include <geom/geom.h>
59
60static g_access_t g_disk_access;
61
62struct g_class g_disk_class = {
63 "DISK",
64 NULL,
65 NULL,
66 G_CLASS_INITIALIZER
67};
68
69static int
70g_disk_access(struct g_provider *pp, int r, int w, int e)
71{
72 struct disk *dp;
73 dev_t dev;
74 int error;
75
76 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
77 pp->name, r, w, e);
78 g_topology_assert();
79 r += pp->acr;
80 w += pp->acw;
81 e += pp->ace;
82 dp = pp->geom->softc;
83 dev = dp->d_dev;
84 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
85 mtx_lock(&Giant);
86 error = devsw(dev)->d_open(dev, 3, 0, NULL);
87 if (error != 0)
88 printf("Opened disk %s -> %d\n", pp->name, error);
89 mtx_unlock(&Giant);
90 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
91 mtx_lock(&Giant);
92 error = devsw(dev)->d_close(dev, 3, 0, NULL);
93 if (error != 0)
94 printf("Closed disk %s -> %d\n", pp->name, error);
95 mtx_unlock(&Giant);
96 } else {
97 error = 0;
98 }
99 pp->mediasize = dp->d_mediasize;
100 return (error);
101}
102
103static void
104g_disk_kerneldump(struct bio *bp, struct disk *dp)
105{
106 int error;
107 struct g_kerneldump *gkd;
108 struct dumperinfo di;
109 struct g_geom *gp;
110
111 gkd = (struct g_kerneldump*)bp->bio_data;
112 gp = bp->bio_to->geom;
113 g_trace(G_T_TOPOLOGY, "g_disk_kernedump(%s, %jd, %jd)",
114 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
115 di.dumper = (dumper_t *)dp->d_devsw->d_dump;
116 di.priv = dp->d_dev;
117 di.blocksize = dp->d_sectorsize;
118 di.mediaoffset = gkd->offset;
119 di.mediasize = gkd->length;
120 error = set_dumper(&di);
121 g_io_deliver(bp, error);
122}
123
124static void
125g_disk_done(struct bio *bp)
126{
127
128 mtx_unlock(&Giant);
129 bp->bio_completed = bp->bio_length - bp->bio_resid;
130 g_std_done(bp);
131 mtx_lock(&Giant);
132}
133
134static void
|
135g_disk_ioctl(void *arg)
136{
137 struct bio *bp;
138 dev_t dev;
139 struct disk *dp;
140 struct g_ioctl *gio;
141 int error;
142
143 bp = arg;
144 dp = bp->bio_to->geom->softc;
145 dev = dp->d_dev;
146 gio = (struct g_ioctl *)bp->bio_data;
147 mtx_lock(&Giant);
148 error = devsw(dev)->d_ioctl(dev, gio->cmd,
149 gio->data, gio->fflag, gio->td);
150 mtx_unlock(&Giant);
151 g_io_deliver(bp, error);
152}
153
154static void
| |
155g_disk_start(struct bio *bp)
156{
157 struct bio *bp2;
158 dev_t dev;
159 struct disk *dp;
160 struct g_ioctl *gio;
161 int error;
162
163 dp = bp->bio_to->geom->softc;
164 dev = dp->d_dev;
165 error = 0;
166 switch(bp->bio_cmd) {
167 case BIO_READ:
168 case BIO_WRITE:
169 bp2 = g_clone_bio(bp);
170 bp2->bio_done = g_disk_done;
171 bp2->bio_blkno = bp2->bio_offset >> DEV_BSHIFT;
172 bp2->bio_pblkno = bp2->bio_blkno;
173 bp2->bio_bcount = bp2->bio_length;
174 bp2->bio_dev = dev;
175 mtx_lock(&Giant);
176 devsw(dev)->d_strategy(bp2);
177 mtx_unlock(&Giant);
178 break;
179 case BIO_GETATTR:
180 if (g_handleattr_int(bp, "GEOM::sectorsize", dp->d_sectorsize))
181 break;
182 else if (g_handleattr_int(bp, "GEOM::fwsectors", dp->d_fwsectors))
183 break;
184 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
185 break;
186 else if (g_handleattr_off_t(bp, "GEOM::mediasize", dp->d_mediasize))
187 break;
188 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0))
189 break;
190 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
191 g_disk_kerneldump(bp, dp);
192 else if (!strcmp(bp->bio_attribute, "GEOM::ioctl") &&
193 bp->bio_length == sizeof *gio) {
| 135g_disk_start(struct bio *bp)
136{
137 struct bio *bp2;
138 dev_t dev;
139 struct disk *dp;
140 struct g_ioctl *gio;
141 int error;
142
143 dp = bp->bio_to->geom->softc;
144 dev = dp->d_dev;
145 error = 0;
146 switch(bp->bio_cmd) {
147 case BIO_READ:
148 case BIO_WRITE:
149 bp2 = g_clone_bio(bp);
150 bp2->bio_done = g_disk_done;
151 bp2->bio_blkno = bp2->bio_offset >> DEV_BSHIFT;
152 bp2->bio_pblkno = bp2->bio_blkno;
153 bp2->bio_bcount = bp2->bio_length;
154 bp2->bio_dev = dev;
155 mtx_lock(&Giant);
156 devsw(dev)->d_strategy(bp2);
157 mtx_unlock(&Giant);
158 break;
159 case BIO_GETATTR:
160 if (g_handleattr_int(bp, "GEOM::sectorsize", dp->d_sectorsize))
161 break;
162 else if (g_handleattr_int(bp, "GEOM::fwsectors", dp->d_fwsectors))
163 break;
164 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
165 break;
166 else if (g_handleattr_off_t(bp, "GEOM::mediasize", dp->d_mediasize))
167 break;
168 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0))
169 break;
170 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
171 g_disk_kerneldump(bp, dp);
172 else if (!strcmp(bp->bio_attribute, "GEOM::ioctl") &&
173 bp->bio_length == sizeof *gio) {
|
194 g_call_me(g_disk_ioctl, bp);
195 return;
| 174 gio = (struct g_ioctl *)bp->bio_data;
175 gio->func = devsw(dp->d_dev)->d_ioctl;
176 gio->dev = dp->d_dev;
177 error = EDIRIOCTL;
|
196 } else
197 error = ENOIOCTL;
198 break;
199 case BIO_SETATTR:
200 if (!strcmp(bp->bio_attribute, "GEOM::ioctl") &&
201 bp->bio_length == sizeof *gio) {
| 178 } else
179 error = ENOIOCTL;
180 break;
181 case BIO_SETATTR:
182 if (!strcmp(bp->bio_attribute, "GEOM::ioctl") &&
183 bp->bio_length == sizeof *gio) {
|
202 g_call_me(g_disk_ioctl, bp);
203 return;
| 184 gio = (struct g_ioctl *)bp->bio_data;
185 gio->func = devsw(dp->d_dev)->d_ioctl;
186 gio->dev = dp->d_dev;
187 error = EDIRIOCTL;
|
204 } else
205 error = ENOIOCTL;
206 break;
207 default:
208 error = EOPNOTSUPP;
209 break;
210 }
211 if (error) {
212 g_io_deliver(bp, error);
213 }
214 return;
215}
216
217dev_t
218disk_create(int unit, struct disk *dp, int flags, struct cdevsw *cdevsw, struct cdevsw *proto)
219{
220 static int once;
221 struct g_geom *gp;
222 struct g_provider *pp;
223 dev_t dev;
224
225 mtx_unlock(&Giant);
226 if (!once) {
227 g_add_class(&g_disk_class);
228 once++;
229 }
230 dev = g_malloc(sizeof *dev, M_WAITOK | M_ZERO);
231 dp->d_dev = dev;
232 dp->d_devsw = cdevsw;
233 dev->si_devsw = cdevsw;
234 dev->si_disk = dp;
235 dev->si_udev = dkmakeminor(unit, WHOLE_DISK_SLICE, RAW_PART);
236 g_topology_lock();
237 gp = g_new_geomf(&g_disk_class, "%s%d", cdevsw->d_name, unit);
238 strcpy(dev->si_name, gp->name);
239 gp->start = g_disk_start;
240 gp->access = g_disk_access;
241 gp->softc = dp;
242 dp->d_softc = gp;
243 pp = g_new_providerf(gp, "%s", gp->name);
244 g_error_provider(pp, 0);
245 g_topology_unlock();
246 mtx_lock(&Giant);
247 return (dev);
248}
249
250void disk_dev_synth(dev_t dev);
251
252void
253disk_dev_synth(dev_t dev)
254{
255
256 return;
257}
258
259void
260disk_destroy(dev_t dev)
261{
262 struct disk *dp;
263 struct g_geom *gp;
264
265 dp = dev->si_disk;
266 gp = dp->d_softc;
267 g_free(dev);
268 gp->flags |= G_GEOM_WITHER;
269 g_orphan_provider(LIST_FIRST(&gp->provider), ENXIO);
270}
271
272void
273disk_invalidate (struct disk *disk)
274{
275}
276
277static void
278g_kern_disks(void *p)
279{
280 struct sbuf *sb;
281 struct g_geom *gp;
282 char *sp;
283
284 sb = p;
285 sp = "";
286 g_topology_assert();
287 LIST_FOREACH(gp, &g_disk_class.geom, geom) {
288 sbuf_printf(sb, "%s%s", sp, gp->name);
289 sp = " ";
290 }
291 sbuf_finish(sb);
292 wakeup(sb);
293}
294
295static int
296sysctl_disks(SYSCTL_HANDLER_ARGS)
297{
298 int error;
299 struct sbuf *sb;
300
301 sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND);
302 sbuf_clear(sb);
303 g_call_me(g_kern_disks, sb);
304 do {
305 tsleep(sb, PZERO, "kern.disks", hz);
306 } while(!sbuf_done(sb));
307 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb));
308 sbuf_delete(sb);
309 return error;
310}
311
312SYSCTL_PROC(_kern, OID_AUTO, disks, CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NOLOCK, 0, 0,
313 sysctl_disks, "A", "names of available disks");
314
315#endif
| 188 } else
189 error = ENOIOCTL;
190 break;
191 default:
192 error = EOPNOTSUPP;
193 break;
194 }
195 if (error) {
196 g_io_deliver(bp, error);
197 }
198 return;
199}
200
201dev_t
202disk_create(int unit, struct disk *dp, int flags, struct cdevsw *cdevsw, struct cdevsw *proto)
203{
204 static int once;
205 struct g_geom *gp;
206 struct g_provider *pp;
207 dev_t dev;
208
209 mtx_unlock(&Giant);
210 if (!once) {
211 g_add_class(&g_disk_class);
212 once++;
213 }
214 dev = g_malloc(sizeof *dev, M_WAITOK | M_ZERO);
215 dp->d_dev = dev;
216 dp->d_devsw = cdevsw;
217 dev->si_devsw = cdevsw;
218 dev->si_disk = dp;
219 dev->si_udev = dkmakeminor(unit, WHOLE_DISK_SLICE, RAW_PART);
220 g_topology_lock();
221 gp = g_new_geomf(&g_disk_class, "%s%d", cdevsw->d_name, unit);
222 strcpy(dev->si_name, gp->name);
223 gp->start = g_disk_start;
224 gp->access = g_disk_access;
225 gp->softc = dp;
226 dp->d_softc = gp;
227 pp = g_new_providerf(gp, "%s", gp->name);
228 g_error_provider(pp, 0);
229 g_topology_unlock();
230 mtx_lock(&Giant);
231 return (dev);
232}
233
234void disk_dev_synth(dev_t dev);
235
236void
237disk_dev_synth(dev_t dev)
238{
239
240 return;
241}
242
243void
244disk_destroy(dev_t dev)
245{
246 struct disk *dp;
247 struct g_geom *gp;
248
249 dp = dev->si_disk;
250 gp = dp->d_softc;
251 g_free(dev);
252 gp->flags |= G_GEOM_WITHER;
253 g_orphan_provider(LIST_FIRST(&gp->provider), ENXIO);
254}
255
256void
257disk_invalidate (struct disk *disk)
258{
259}
260
261static void
262g_kern_disks(void *p)
263{
264 struct sbuf *sb;
265 struct g_geom *gp;
266 char *sp;
267
268 sb = p;
269 sp = "";
270 g_topology_assert();
271 LIST_FOREACH(gp, &g_disk_class.geom, geom) {
272 sbuf_printf(sb, "%s%s", sp, gp->name);
273 sp = " ";
274 }
275 sbuf_finish(sb);
276 wakeup(sb);
277}
278
279static int
280sysctl_disks(SYSCTL_HANDLER_ARGS)
281{
282 int error;
283 struct sbuf *sb;
284
285 sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND);
286 sbuf_clear(sb);
287 g_call_me(g_kern_disks, sb);
288 do {
289 tsleep(sb, PZERO, "kern.disks", hz);
290 } while(!sbuf_done(sb));
291 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb));
292 sbuf_delete(sb);
293 return error;
294}
295
296SYSCTL_PROC(_kern, OID_AUTO, disks, CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NOLOCK, 0, 0,
297 sysctl_disks, "A", "names of available disks");
298
299#endif
|