geom_ctl.c (3117e5448429a5c7974888e6c1d1512ae437061d) geom_ctl.c (d49d7ca5919cd4befb49517b79963db154c5c377)
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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54#include <vm/vm_extern.h>
55
56#include <geom/geom.h>
57#include <geom/geom_int.h>
58#define GEOM_CTL_TABLE 1
59#include <geom/geom_ctl.h>
60#include <geom/geom_ext.h>
61
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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54#include <vm/vm_extern.h>
55
56#include <geom/geom.h>
57#include <geom/geom_int.h>
58#define GEOM_CTL_TABLE 1
59#include <geom/geom_ctl.h>
60#include <geom/geom_ext.h>
61
62
63static g_access_t g_ctl_access;
64static g_start_t g_ctl_start;
65static void g_ctl_init(void);
66static d_ioctl_t g_ctl_ioctl;
67
62static d_ioctl_t g_ctl_ioctl;
63
68struct g_class g_ctl_class = {
69 "GEOMCTL",
70 NULL,
71 NULL,
72 G_CLASS_INITIALIZER
64static struct cdevsw g_ctl_cdevsw = {
65 .d_open = nullopen,
66 .d_close = nullclose,
67 .d_ioctl = g_ctl_ioctl,
68 .d_name = "g_ctl",
73};
74
69};
70
75DECLARE_GEOM_CLASS_INIT(g_ctl_class, g_ctl, g_ctl_init);
76
77/*
78 * We cannot do create our geom.ctl geom/provider in g_ctl_init() because
79 * the event thread has to finish adding our class first and that doesn't
80 * happen until later. We know however, that the events are processed in
81 * FIFO order, so scheduling g_ctl_init2() with g_call_me() is safe.
82 */
83
84static void
85g_ctl_init2(void *p __unused)
86{
87 struct g_geom *gp;
88 struct g_provider *pp;
89
90 g_topology_assert();
91 gp = g_new_geomf(&g_ctl_class, "geom.ctl");
92 gp->start = g_ctl_start;
93 gp->access = g_ctl_access;
94 pp = g_new_providerf(gp, "%s", gp->name);
95 pp->sectorsize = 512;
96 g_error_provider(pp, 0);
97}
98
99static void
71void
100g_ctl_init(void)
101{
72g_ctl_init(void)
73{
102 mtx_unlock(&Giant);
103 g_add_class(&g_ctl_class);
104 g_call_me(g_ctl_init2, NULL);
105 mtx_lock(&Giant);
106}
107
74
108/*
109 * We allow any kind of access. Access control is handled at the devfs
110 * level.
111 */
112
113static int
114g_ctl_access(struct g_provider *pp, int r, int w, int e)
115{
116 int error;
117
118 g_trace(G_T_ACCESS, "g_ctl_access(%s, %d, %d, %d)",
119 pp->name, r, w, e);
120
121 g_topology_assert();
122 error = 0;
123 return (error);
75 make_dev(&g_ctl_cdevsw, 0,
76 UID_ROOT, GID_OPERATOR, 0640, PATH_GEOM_CTL);
124}
125
77}
78
126static void
127g_ctl_start(struct bio *bp)
128{
129 struct g_ioctl *gio;
130 int error;
131
132 switch(bp->bio_cmd) {
133 case BIO_DELETE:
134 case BIO_READ:
135 case BIO_WRITE:
136 error = EOPNOTSUPP;
137 break;
138 case BIO_GETATTR:
139 case BIO_SETATTR:
140 if (strcmp(bp->bio_attribute, "GEOM::ioctl") ||
141 bp->bio_length != sizeof *gio) {
142 error = EOPNOTSUPP;
143 break;
144 }
145 gio = (struct g_ioctl *)bp->bio_data;
146 gio->func = g_ctl_ioctl;
147 error = EDIRIOCTL;
148 break;
149 default:
150 error = EOPNOTSUPP;
151 break;
152 }
153 g_io_deliver(bp, error);
154 return;
155}
156
157/*
158 * All the stuff above is really just needed to get to the stuff below
159 */
160
161static int
162g_ctl_ioctl_configgeom(dev_t dev, u_long cmd, caddr_t data, int fflag, struct thread *td)
163{
164 struct geomconfiggeom *gcp;
165 struct g_configargs ga;
166 int error;
167
168 error = 0;

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366 req->reqt = &gcrt[i];
367 break;
368 }
369 if (gcrt[i].request == GEOM_INVALID_REQUEST)
370 return (g_ctl_seterror(req, "Invalid request"));
371 error = geom_ctl_copyin(req);
372 if (error)
373 return (error);
79static int
80g_ctl_ioctl_configgeom(dev_t dev, u_long cmd, caddr_t data, int fflag, struct thread *td)
81{
82 struct geomconfiggeom *gcp;
83 struct g_configargs ga;
84 int error;
85
86 error = 0;

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284 req->reqt = &gcrt[i];
285 break;
286 }
287 if (gcrt[i].request == GEOM_INVALID_REQUEST)
288 return (g_ctl_seterror(req, "Invalid request"));
289 error = geom_ctl_copyin(req);
290 if (error)
291 return (error);
292 req->reqt = &gcrt[i];
293 g_stall_events();
374 geom_ctl_dump(req);
294 geom_ctl_dump(req);
295 g_release_events();
375 return (0);
376}
377
378static int
379g_ctl_ioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, struct thread *td)
380{
381 int error;
382
296 return (0);
297}
298
299static int
300g_ctl_ioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, struct thread *td)
301{
302 int error;
303
383 DROP_GIANT();
384 g_topology_lock();
385 switch(cmd) {
386 case GEOMCONFIGGEOM:
304 switch(cmd) {
305 case GEOMCONFIGGEOM:
306 DROP_GIANT();
307 g_topology_lock();
387 error = g_ctl_ioctl_configgeom(dev, cmd, data, fflag, td);
308 error = g_ctl_ioctl_configgeom(dev, cmd, data, fflag, td);
309 g_topology_unlock();
310 PICKUP_GIANT();
388 break;
389 case GEOM_CTL:
390 error = g_ctl_ioctl_ctl(dev, cmd, data, fflag, td);
391 break;
392 default:
393 error = ENOTTY;
394 break;
395 }
311 break;
312 case GEOM_CTL:
313 error = g_ctl_ioctl_ctl(dev, cmd, data, fflag, td);
314 break;
315 default:
316 error = ENOTTY;
317 break;
318 }
396 g_topology_unlock();
397 PICKUP_GIANT();
398 return (error);
399
400}
319 return (error);
320
321}