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 94175 2002-04-08 08:00:40Z phk $
| 35 * $FreeBSD: head/sys/geom/geom_disk.c 94287 2002-04-09 15:43:32Z phk $
|
36 */
37
38#include "opt_geom.h"
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/kernel.h>
43#include <sys/sysctl.h>
44#include <sys/bio.h>
45#include <sys/conf.h>
46#include <sys/disk.h>
47#include <sys/malloc.h>
48#include <sys/sysctl.h>
49#include <machine/md_var.h>
50#include <sys/ctype.h>
51
52
53#include <sys/lock.h>
54#include <sys/mutex.h>
55#include <geom/geom.h>
56
57static g_access_t g_disk_access;
58
59struct g_class g_disk_class = {
60 "DISK-class",
61 NULL,
62 NULL,
63 G_CLASS_INITSTUFF
64};
65
66static int
67g_disk_access(struct g_provider *pp, int r, int w, int e)
68{
69 struct disk *dp;
70 dev_t dev;
71 int error;
72
73 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
74 pp->name, r, w, e);
75 g_topology_assert();
76 r += pp->acr;
77 w += pp->acw;
78 e += pp->ace;
79 dp = pp->geom->softc;
80 dev = dp->d_dev;
81 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
82 mtx_lock(&Giant);
83 error = devsw(dev)->d_open(dev, 3, 0, NULL);
84 if (error != 0)
85 printf("Opened disk %s -> %d\n", pp->name, error);
86 mtx_unlock(&Giant);
87 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
88 mtx_lock(&Giant);
89 error = devsw(dev)->d_close(dev, 3, 0, NULL);
90 if (error != 0)
91 printf("Closed disk %s -> %d\n", pp->name, error);
92 mtx_unlock(&Giant);
93 } else {
94 error = 0;
95 }
96 pp->mediasize =
97 dp->d_label.d_secsize * (off_t)dp->d_label.d_secperunit;
98 return (error);
99}
100
101static void
102g_disk_done(struct bio *bp)
103{
104
105 mtx_unlock(&Giant);
106 bp->bio_completed = bp->bio_length - bp->bio_resid;
107 g_std_done(bp);
108 mtx_lock(&Giant);
109}
110
111static void
112g_disk_start(struct bio *bp)
113{
114 struct bio *bp2;
115 dev_t dev;
116 struct disk *dp;
117 struct g_ioctl *gio;
118 int error;
119
120 dp = bp->bio_to->geom->softc;
121 dev = dp->d_dev;
122 error = 0;
123 switch(bp->bio_cmd) {
124 case BIO_READ:
125 case BIO_WRITE:
126 bp2 = g_clone_bio(bp);
127 bp2->bio_done = g_disk_done;
128 bp2->bio_blkno = bp2->bio_offset >> DEV_BSHIFT;
129 bp2->bio_pblkno = bp2->bio_blkno;
130 bp2->bio_bcount = bp2->bio_length;
131 bp2->bio_dev = dev;
132 mtx_lock(&Giant);
133 devsw(dev)->d_strategy(bp2);
134 mtx_unlock(&Giant);
135 break;
136 case BIO_GETATTR:
137 if (g_haveattr_int(bp, "GEOM::sectorsize",
138 dp->d_label.d_secsize))
139 break;
140 else if (g_haveattr_int(bp, "GEOM::fwsectors",
141 dp->d_label.d_nsectors))
142 break;
143 else if (g_haveattr_int(bp, "GEOM::fwheads",
144 dp->d_label.d_ntracks))
145 break;
146 else if (g_haveattr_off_t(bp, "GEOM::mediasize",
147 dp->d_label.d_secsize * (off_t)dp->d_label.d_secperunit))
148 break;
| 36 */
37
38#include "opt_geom.h"
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/kernel.h>
43#include <sys/sysctl.h>
44#include <sys/bio.h>
45#include <sys/conf.h>
46#include <sys/disk.h>
47#include <sys/malloc.h>
48#include <sys/sysctl.h>
49#include <machine/md_var.h>
50#include <sys/ctype.h>
51
52
53#include <sys/lock.h>
54#include <sys/mutex.h>
55#include <geom/geom.h>
56
57static g_access_t g_disk_access;
58
59struct g_class g_disk_class = {
60 "DISK-class",
61 NULL,
62 NULL,
63 G_CLASS_INITSTUFF
64};
65
66static int
67g_disk_access(struct g_provider *pp, int r, int w, int e)
68{
69 struct disk *dp;
70 dev_t dev;
71 int error;
72
73 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
74 pp->name, r, w, e);
75 g_topology_assert();
76 r += pp->acr;
77 w += pp->acw;
78 e += pp->ace;
79 dp = pp->geom->softc;
80 dev = dp->d_dev;
81 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
82 mtx_lock(&Giant);
83 error = devsw(dev)->d_open(dev, 3, 0, NULL);
84 if (error != 0)
85 printf("Opened disk %s -> %d\n", pp->name, error);
86 mtx_unlock(&Giant);
87 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
88 mtx_lock(&Giant);
89 error = devsw(dev)->d_close(dev, 3, 0, NULL);
90 if (error != 0)
91 printf("Closed disk %s -> %d\n", pp->name, error);
92 mtx_unlock(&Giant);
93 } else {
94 error = 0;
95 }
96 pp->mediasize =
97 dp->d_label.d_secsize * (off_t)dp->d_label.d_secperunit;
98 return (error);
99}
100
101static void
102g_disk_done(struct bio *bp)
103{
104
105 mtx_unlock(&Giant);
106 bp->bio_completed = bp->bio_length - bp->bio_resid;
107 g_std_done(bp);
108 mtx_lock(&Giant);
109}
110
111static void
112g_disk_start(struct bio *bp)
113{
114 struct bio *bp2;
115 dev_t dev;
116 struct disk *dp;
117 struct g_ioctl *gio;
118 int error;
119
120 dp = bp->bio_to->geom->softc;
121 dev = dp->d_dev;
122 error = 0;
123 switch(bp->bio_cmd) {
124 case BIO_READ:
125 case BIO_WRITE:
126 bp2 = g_clone_bio(bp);
127 bp2->bio_done = g_disk_done;
128 bp2->bio_blkno = bp2->bio_offset >> DEV_BSHIFT;
129 bp2->bio_pblkno = bp2->bio_blkno;
130 bp2->bio_bcount = bp2->bio_length;
131 bp2->bio_dev = dev;
132 mtx_lock(&Giant);
133 devsw(dev)->d_strategy(bp2);
134 mtx_unlock(&Giant);
135 break;
136 case BIO_GETATTR:
137 if (g_haveattr_int(bp, "GEOM::sectorsize",
138 dp->d_label.d_secsize))
139 break;
140 else if (g_haveattr_int(bp, "GEOM::fwsectors",
141 dp->d_label.d_nsectors))
142 break;
143 else if (g_haveattr_int(bp, "GEOM::fwheads",
144 dp->d_label.d_ntracks))
145 break;
146 else if (g_haveattr_off_t(bp, "GEOM::mediasize",
147 dp->d_label.d_secsize * (off_t)dp->d_label.d_secperunit))
148 break;
|
| 149 else if (g_haveattr_off_t(bp, "GEOM::frontstuff", 0))
150 break;
|
149 else if (!strcmp(bp->bio_attribute, "GEOM::ioctl") &&
150 bp->bio_length == sizeof *gio) {
151 gio = (struct g_ioctl *)bp->bio_data;
152 mtx_lock(&Giant);
153 error = devsw(dev)->d_ioctl(dev, gio->cmd,
154 gio->data, gio->fflag, gio->td);
155 mtx_unlock(&Giant);
156 } else
157 error = ENOIOCTL;
158 break;
159 default:
160 error = EOPNOTSUPP;
161 break;
162 }
163 if (error) {
164 bp->bio_error = error;
165 g_io_deliver(bp);
166 }
167 return;
168}
169
170dev_t
171disk_create(int unit, struct disk *dp, int flags, struct cdevsw *cdevsw, struct cdevsw *proto)
172{
173 static int once;
174 struct g_geom *gp;
175 struct g_provider *pp;
176 dev_t dev;
177
178 mtx_unlock(&Giant);
179 if (!once) {
180 g_add_class(&g_disk_class);
181 once++;
182 }
183 dev = g_malloc(sizeof *dev, M_WAITOK | M_ZERO);
184 dp->d_dev = dev;
185 dp->d_devsw = cdevsw;
186 dev->si_devsw = cdevsw;
187 dev->si_disk = dp;
188 dev->si_udev = dkmakeminor(unit, WHOLE_DISK_SLICE, RAW_PART);
189 g_topology_lock();
190 gp = g_new_geomf(&g_disk_class, "%s%d", cdevsw->d_name, unit);
191 gp->start = g_disk_start;
192 gp->access = g_disk_access;
193 gp->softc = dp;
194 dp->d_softc = gp;
195 pp = g_new_providerf(gp, "%s", gp->name);
196 g_error_provider(pp, 0);
197 g_topology_unlock();
198 mtx_lock(&Giant);
199 return (dev);
200}
201
202void disk_dev_synth(dev_t dev);
203
204void
205disk_dev_synth(dev_t dev)
206{
207
208 return;
209}
210
211void
212disk_destroy(dev_t dev)
213{
214 struct disk *dp;
215 struct g_geom *gp;
216
217 dp = dev->si_disk;
218 gp = dp->d_softc;
219 g_free(dev);
220 gp->flags |= G_GEOM_WITHER;
221 g_orphan_provider(LIST_FIRST(&gp->provider), ENXIO);
222}
223
224void
225disk_invalidate (struct disk *disk)
226{
227}
228
229
230SYSCTL_INT(_debug_sizeof, OID_AUTO, disklabel, CTLFLAG_RD,
231 0, sizeof(struct disklabel), "sizeof(struct disklabel)");
232
233SYSCTL_INT(_debug_sizeof, OID_AUTO, diskslices, CTLFLAG_RD,
234 0, sizeof(struct diskslices), "sizeof(struct diskslices)");
235
236SYSCTL_INT(_debug_sizeof, OID_AUTO, disk, CTLFLAG_RD,
237 0, sizeof(struct disk), "sizeof(struct disk)");
| 151 else if (!strcmp(bp->bio_attribute, "GEOM::ioctl") &&
152 bp->bio_length == sizeof *gio) {
153 gio = (struct g_ioctl *)bp->bio_data;
154 mtx_lock(&Giant);
155 error = devsw(dev)->d_ioctl(dev, gio->cmd,
156 gio->data, gio->fflag, gio->td);
157 mtx_unlock(&Giant);
158 } else
159 error = ENOIOCTL;
160 break;
161 default:
162 error = EOPNOTSUPP;
163 break;
164 }
165 if (error) {
166 bp->bio_error = error;
167 g_io_deliver(bp);
168 }
169 return;
170}
171
172dev_t
173disk_create(int unit, struct disk *dp, int flags, struct cdevsw *cdevsw, struct cdevsw *proto)
174{
175 static int once;
176 struct g_geom *gp;
177 struct g_provider *pp;
178 dev_t dev;
179
180 mtx_unlock(&Giant);
181 if (!once) {
182 g_add_class(&g_disk_class);
183 once++;
184 }
185 dev = g_malloc(sizeof *dev, M_WAITOK | M_ZERO);
186 dp->d_dev = dev;
187 dp->d_devsw = cdevsw;
188 dev->si_devsw = cdevsw;
189 dev->si_disk = dp;
190 dev->si_udev = dkmakeminor(unit, WHOLE_DISK_SLICE, RAW_PART);
191 g_topology_lock();
192 gp = g_new_geomf(&g_disk_class, "%s%d", cdevsw->d_name, unit);
193 gp->start = g_disk_start;
194 gp->access = g_disk_access;
195 gp->softc = dp;
196 dp->d_softc = gp;
197 pp = g_new_providerf(gp, "%s", gp->name);
198 g_error_provider(pp, 0);
199 g_topology_unlock();
200 mtx_lock(&Giant);
201 return (dev);
202}
203
204void disk_dev_synth(dev_t dev);
205
206void
207disk_dev_synth(dev_t dev)
208{
209
210 return;
211}
212
213void
214disk_destroy(dev_t dev)
215{
216 struct disk *dp;
217 struct g_geom *gp;
218
219 dp = dev->si_disk;
220 gp = dp->d_softc;
221 g_free(dev);
222 gp->flags |= G_GEOM_WITHER;
223 g_orphan_provider(LIST_FIRST(&gp->provider), ENXIO);
224}
225
226void
227disk_invalidate (struct disk *disk)
228{
229}
230
231
232SYSCTL_INT(_debug_sizeof, OID_AUTO, disklabel, CTLFLAG_RD,
233 0, sizeof(struct disklabel), "sizeof(struct disklabel)");
234
235SYSCTL_INT(_debug_sizeof, OID_AUTO, diskslices, CTLFLAG_RD,
236 0, sizeof(struct diskslices), "sizeof(struct diskslices)");
237
238SYSCTL_INT(_debug_sizeof, OID_AUTO, disk, CTLFLAG_RD,
239 0, sizeof(struct disk), "sizeof(struct disk)");
|