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 *
|
104
105/*
106 * The g_geom is an instance of a g_class.
107 */
108struct g_geom {
109 u_int protect;
110 char *name;
111 struct g_class *class;
112 LIST_ENTRY(g_geom) geom;
113 LIST_HEAD(,g_consumer) consumer;
114 LIST_HEAD(,g_provider) provider;
115 TAILQ_ENTRY(g_geom) geoms; /* XXX: better name */
116 int rank;
117 g_start_t *start;
118 g_spoiled_t *spoiled;
119 g_dumpconf_t *dumpconf;
120 g_access_t *access;
121 g_orphan_t *orphan;
122 void *softc;
123 struct g_event *event;
124 unsigned flags;
125#define G_GEOM_WITHER 1
126};
127
128/*
129 * The g_bioq is a queue of struct bio's.
130 * XXX: possibly collection point for statistics.
131 * XXX: should (possibly) be collapsed with sys/bio.h::bio_queue_head.
132 */
133struct g_bioq {
134 TAILQ_HEAD(, bio) bio_queue;
135 struct mtx bio_queue_lock;
136 int bio_queue_length;
137};
138
139/*
140 * A g_consumer is an attachment point for a g_provider. One g_consumer
141 * can only be attached to one g_provider, but multiple g_consumers
142 * can be attached to one g_provider.
143 */
144
145struct g_consumer {
146 u_int protect;
147 struct g_geom *geom;
148 LIST_ENTRY(g_consumer) consumer;
149 struct g_provider *provider;
150 LIST_ENTRY(g_consumer) consumers; /* XXX: better name */
151 int acr, acw, ace;
152 struct g_event *event;
153 int spoiled;
154 struct devstat *stat;
155 u_int nstart, nend;
156};
157
158/*
159 * A g_provider is a "logical disk".
160 */
161struct g_provider {
162 u_int protect;
163 char *name;
164 LIST_ENTRY(g_provider) provider;
165 struct g_geom *geom;
166 LIST_HEAD(,g_consumer) consumers;
167 int acr, acw, ace;
168 int error;
169 struct g_event *event;
170 TAILQ_ENTRY(g_provider) orphan;
171 u_int index;
172 off_t mediasize;
173 u_int sectorsize;
174 u_int stripesize;
175 u_int stripeoffset;
176 struct devstat *stat;
177 u_int nstart, nend;
178 u_int flags;
179#define G_PF_CANDELETE 0x1
180};
181
182/*
183 * This gadget is used by userland to pinpoint a particular instance of
184 * something in the kernel. The name is unreadable on purpose, people
185 * should not encounter it directly but use library functions to deal
186 * with it.
187 * If len is zero, "id" contains a cast of the kernel pointer where the
188 * entity is located, (likely derived from the "id=" attribute in the
189 * XML config) and the g_id*() functions will validate this before allowing
190 * it to be used.
191 * If len is non-zero, it is the strlen() of the name which is pointed to
192 * by "name".
193 */
194struct geomidorname {
195 u_int len;
196 union {
197 const char *name;
198 uintptr_t id;
199 } u;
200};
201
202/* geom_dev.c */
203int g_dev_print(void);
204
205/* geom_dump.c */
206void g_hexdump(void *ptr, int length);
207void g_trace(int level, const char *, ...);
208# define G_T_TOPOLOGY 1
209# define G_T_BIO 2
210# define G_T_ACCESS 4
211
212
213/* geom_event.c */
214typedef void g_call_me_t(void *);
215int g_call_me(g_call_me_t *func, void *arg);
216void g_orphan_provider(struct g_provider *pp, int error);
217void g_waitidle(void);
218
219/* geom_subr.c */
220int g_access_abs(struct g_consumer *cp, int nread, int nwrite, int nexcl);
221int g_access_rel(struct g_consumer *cp, int nread, int nwrite, int nexcl);
222void g_add_class(struct g_class *mp);
223int g_attach(struct g_consumer *cp, struct g_provider *pp);
224void g_destroy_consumer(struct g_consumer *cp);
225void g_destroy_geom(struct g_geom *pp);
226void g_destroy_provider(struct g_provider *pp);
227void g_detach(struct g_consumer *cp);
228void g_error_provider(struct g_provider *pp, int error);
229int g_getattr__(const char *attr, struct g_consumer *cp, void *var, int len);
230#define g_getattr(a, c, v) g_getattr__((a), (c), (v), sizeof *(v))
231int g_handleattr(struct bio *bp, const char *attribute, void *val, int len);
232int g_handleattr_int(struct bio *bp, const char *attribute, int val);
233int g_handleattr_off_t(struct bio *bp, const char *attribute, off_t val);
234struct g_geom * g_insert_geom(const char *class, struct g_consumer *cp);
235struct g_consumer * g_new_consumer(struct g_geom *gp);
236struct g_geom * g_new_geomf(struct g_class *mp, const char *fmt, ...);
237struct g_provider * g_new_providerf(struct g_geom *gp, const char *fmt, ...);
238void g_sanity(void *ptr);
239void g_spoil(struct g_provider *pp, struct g_consumer *cp);
240int g_std_access(struct g_provider *pp, int dr, int dw, int de);
241void g_std_done(struct bio *bp);
242void g_std_spoiled(struct g_consumer *cp);
243struct g_class *g_idclass(struct geomidorname *);
244struct g_geom *g_idgeom(struct geomidorname *);
245struct g_provider *g_idprovider(struct geomidorname *);
246
247
248/* geom_io.c */
249struct bio * g_clone_bio(struct bio *);
250void g_destroy_bio(struct bio *);
251void g_io_deliver(struct bio *bp, int error);
252int g_io_getattr(const char *attr, struct g_consumer *cp, int *len, void *ptr);
253void g_io_request(struct bio *bp, struct g_consumer *cp);
254int g_io_setattr(const char *attr, struct g_consumer *cp, int len, void *ptr);
255struct bio *g_new_bio(void);
256void * g_read_data(struct g_consumer *cp, off_t offset, off_t length, int *error);
257int g_write_data(struct g_consumer *cp, off_t offset, void *ptr, off_t length);
258
259/* geom_kern.c / geom_kernsim.c */
260
261#ifndef _SYS_CONF_H_
262typedef int d_ioctl_t(dev_t dev, u_long cmd, caddr_t data,
263 int fflag, struct thread *td);
264#endif
265
266struct g_ioctl {
267 u_long cmd;
268 void *data;
269 int fflag;
270 struct thread *td;
271 d_ioctl_t *func;
272 void *dev;
273};
274
275#ifdef _KERNEL
276
277struct g_kerneldump {
278 off_t offset;
279 off_t length;
280};
281
282MALLOC_DECLARE(M_GEOM);
283
284static __inline void *
285g_malloc(int size, int flags)
286{
287 void *p;
288
289 p = malloc(size, M_GEOM, flags);
290 g_sanity(p);
291 /* printf("malloc(%d, %x) -> %p\n", size, flags, p); */
292 return (p);
293}
294
295static __inline void
296g_free(void *ptr)
297{
298 g_sanity(ptr);
299 /* printf("free(%p)\n", ptr); */
300 free(ptr, M_GEOM);
301}
302
303extern struct sx topology_lock;
304
305#define g_topology_lock() \
306 do { \
307 mtx_assert(&Giant, MA_NOTOWNED); \
308 sx_xlock(&topology_lock); \
309 } while (0)
310
311#define g_topology_unlock() \
312 do { \
313 g_sanity(NULL); \
314 sx_xunlock(&topology_lock); \
315 } while (0)
316
317#define g_topology_assert() \
318 do { \
319 g_sanity(NULL); \
320 sx_assert(&topology_lock, SX_XLOCKED); \
321 } while (0)
322
323#define DECLARE_GEOM_CLASS_INIT(class, name, init) \
324 SYSINIT(name, SI_SUB_DRIVERS, SI_ORDER_FIRST, init, NULL);
325
326#define DECLARE_GEOM_CLASS(class, name) \
327 static void \
328 name##init(void) \
329 { \
330 mtx_unlock(&Giant); \
331 g_add_class(&class); \
332 mtx_lock(&Giant); \
333 } \
334 DECLARE_GEOM_CLASS_INIT(class, name, name##init);
335
336#endif /* _KERNEL */
337
338/*
339 * IOCTLS for talking to the geom.ctl device.
340 */
341
342/*
343 * This is the structure used internally in the kernel, it is created and
344 * populated by geom_ctl.c.
345 */
346struct g_configargs {
347 /* Valid on call */
348 struct g_class *class;
349 struct g_geom *geom;
350 struct g_provider *provider;
351 u_int flag;
352 u_int len;
353 void *ptr;
354};
355
356/*
357 * This is the structure used to communicate with userland.
358 */
359struct geomconfiggeom {
360 /* Valid on call */
361 struct geomidorname class;
362 struct geomidorname geom;
363 struct geomidorname provider;
364 u_int flag;
365 u_int len;
366 void *ptr;
367};
368
369#define GEOMCONFIGGEOM _IOW('G', 0, struct geomconfiggeom)
370
371#define GCFG_GENERIC0 0x00000000
372 /*
373 * Generic requests suitable for all classes.
374 */
375#define GCFG_CLASS0 0x10000000
376 /*
377 * Class specific verbs. Allocations in this part of the numberspace
378 * can only be done after review and approval of phk@FreeBSD.org.
379 * All allocations in this space will be listed in this file.
380 */
381#define GCFG_PRIVATE0 0x20000000
382 /*
383 * Lowest allocation for private flag definitions.
384 * If you define you own private "verbs", please express them in
385 * your code as (GCFG_PRIVATE0 + somenumber), where somenumber is
386 * a magic number in the range [0x0 ... 0xfffffff] chosen the way
387 * magic numbers are chosen. Such allocation SHALL NOT be listed
388 * here but SHOULD be listed in some suitable .h file.
389 */
390#define GCFG_RESERVED0 0x30000000
391#define GCFG_RESERVEDN 0xffffffff
392 /*
393 * This area is reserved for the future.
394 */
395
396#define GCFG_CREATE (GCFG_GENERIC0 + 0x0)
397 /*
398 * Request geom construction.
399 * ptr/len is class-specific.
400 */
401#define GCFG_DISMANTLE (GCFG_GENERIC0 + 0x1)
402 /*
403 * Request orderly geom dismantling.
404 * ptr/len is class-specific.
405 */
406
407
408struct gcfg_magicrw {
409 off_t offset;
410 u_int len;
411};
412
413#define GCFG_MAGICREAD (GCFG_GENERIC0 + 0x100)
414 /*
415 * Read of magic spaces.
416 * ptr/len is gcfgmagicrw structure followed by bufferspace
417 * for data to be read.
418 */
419#define GCFG_MAGICWRITE (GCFG_GENERIC0 + 0x101)
420 /*
421 * Write of magic spaces.
422 * as above, only the other way.
423 */
424
425
426/* geom_enc.c */
427uint16_t g_dec_be2(const u_char *p);
428uint32_t g_dec_be4(const u_char *p);
429uint16_t g_dec_le2(const u_char *p);
430uint32_t g_dec_le4(const u_char *p);
431uint64_t g_dec_le8(const u_char *p);
432void g_enc_le2(u_char *p, uint16_t u);
433void g_enc_le4(u_char *p, uint32_t u);
434void g_enc_le8(u_char *p, uint64_t u);
435
436#endif /* _GEOM_GEOM_H_ */
| 108
109/*
110 * The g_geom is an instance of a g_class.
111 */
112struct g_geom {
113 u_int protect;
114 char *name;
115 struct g_class *class;
116 LIST_ENTRY(g_geom) geom;
117 LIST_HEAD(,g_consumer) consumer;
118 LIST_HEAD(,g_provider) provider;
119 TAILQ_ENTRY(g_geom) geoms; /* XXX: better name */
120 int rank;
121 g_start_t *start;
122 g_spoiled_t *spoiled;
123 g_dumpconf_t *dumpconf;
124 g_access_t *access;
125 g_orphan_t *orphan;
126 void *softc;
127 struct g_event *event;
128 unsigned flags;
129#define G_GEOM_WITHER 1
130};
131
132/*
133 * The g_bioq is a queue of struct bio's.
134 * XXX: possibly collection point for statistics.
135 * XXX: should (possibly) be collapsed with sys/bio.h::bio_queue_head.
136 */
137struct g_bioq {
138 TAILQ_HEAD(, bio) bio_queue;
139 struct mtx bio_queue_lock;
140 int bio_queue_length;
141};
142
143/*
144 * A g_consumer is an attachment point for a g_provider. One g_consumer
145 * can only be attached to one g_provider, but multiple g_consumers
146 * can be attached to one g_provider.
147 */
148
149struct g_consumer {
150 u_int protect;
151 struct g_geom *geom;
152 LIST_ENTRY(g_consumer) consumer;
153 struct g_provider *provider;
154 LIST_ENTRY(g_consumer) consumers; /* XXX: better name */
155 int acr, acw, ace;
156 struct g_event *event;
157 int spoiled;
158 struct devstat *stat;
159 u_int nstart, nend;
160};
161
162/*
163 * A g_provider is a "logical disk".
164 */
165struct g_provider {
166 u_int protect;
167 char *name;
168 LIST_ENTRY(g_provider) provider;
169 struct g_geom *geom;
170 LIST_HEAD(,g_consumer) consumers;
171 int acr, acw, ace;
172 int error;
173 struct g_event *event;
174 TAILQ_ENTRY(g_provider) orphan;
175 u_int index;
176 off_t mediasize;
177 u_int sectorsize;
178 u_int stripesize;
179 u_int stripeoffset;
180 struct devstat *stat;
181 u_int nstart, nend;
182 u_int flags;
183#define G_PF_CANDELETE 0x1
184};
185
186/*
187 * This gadget is used by userland to pinpoint a particular instance of
188 * something in the kernel. The name is unreadable on purpose, people
189 * should not encounter it directly but use library functions to deal
190 * with it.
191 * If len is zero, "id" contains a cast of the kernel pointer where the
192 * entity is located, (likely derived from the "id=" attribute in the
193 * XML config) and the g_id*() functions will validate this before allowing
194 * it to be used.
195 * If len is non-zero, it is the strlen() of the name which is pointed to
196 * by "name".
197 */
198struct geomidorname {
199 u_int len;
200 union {
201 const char *name;
202 uintptr_t id;
203 } u;
204};
205
206/* geom_dev.c */
207int g_dev_print(void);
208
209/* geom_dump.c */
210void g_hexdump(void *ptr, int length);
211void g_trace(int level, const char *, ...);
212# define G_T_TOPOLOGY 1
213# define G_T_BIO 2
214# define G_T_ACCESS 4
215
216
217/* geom_event.c */
218typedef void g_call_me_t(void *);
219int g_call_me(g_call_me_t *func, void *arg);
220void g_orphan_provider(struct g_provider *pp, int error);
221void g_waitidle(void);
222
223/* geom_subr.c */
224int g_access_abs(struct g_consumer *cp, int nread, int nwrite, int nexcl);
225int g_access_rel(struct g_consumer *cp, int nread, int nwrite, int nexcl);
226void g_add_class(struct g_class *mp);
227int g_attach(struct g_consumer *cp, struct g_provider *pp);
228void g_destroy_consumer(struct g_consumer *cp);
229void g_destroy_geom(struct g_geom *pp);
230void g_destroy_provider(struct g_provider *pp);
231void g_detach(struct g_consumer *cp);
232void g_error_provider(struct g_provider *pp, int error);
233int g_getattr__(const char *attr, struct g_consumer *cp, void *var, int len);
234#define g_getattr(a, c, v) g_getattr__((a), (c), (v), sizeof *(v))
235int g_handleattr(struct bio *bp, const char *attribute, void *val, int len);
236int g_handleattr_int(struct bio *bp, const char *attribute, int val);
237int g_handleattr_off_t(struct bio *bp, const char *attribute, off_t val);
238struct g_geom * g_insert_geom(const char *class, struct g_consumer *cp);
239struct g_consumer * g_new_consumer(struct g_geom *gp);
240struct g_geom * g_new_geomf(struct g_class *mp, const char *fmt, ...);
241struct g_provider * g_new_providerf(struct g_geom *gp, const char *fmt, ...);
242void g_sanity(void *ptr);
243void g_spoil(struct g_provider *pp, struct g_consumer *cp);
244int g_std_access(struct g_provider *pp, int dr, int dw, int de);
245void g_std_done(struct bio *bp);
246void g_std_spoiled(struct g_consumer *cp);
247struct g_class *g_idclass(struct geomidorname *);
248struct g_geom *g_idgeom(struct geomidorname *);
249struct g_provider *g_idprovider(struct geomidorname *);
250
251
252/* geom_io.c */
253struct bio * g_clone_bio(struct bio *);
254void g_destroy_bio(struct bio *);
255void g_io_deliver(struct bio *bp, int error);
256int g_io_getattr(const char *attr, struct g_consumer *cp, int *len, void *ptr);
257void g_io_request(struct bio *bp, struct g_consumer *cp);
258int g_io_setattr(const char *attr, struct g_consumer *cp, int len, void *ptr);
259struct bio *g_new_bio(void);
260void * g_read_data(struct g_consumer *cp, off_t offset, off_t length, int *error);
261int g_write_data(struct g_consumer *cp, off_t offset, void *ptr, off_t length);
262
263/* geom_kern.c / geom_kernsim.c */
264
265#ifndef _SYS_CONF_H_
266typedef int d_ioctl_t(dev_t dev, u_long cmd, caddr_t data,
267 int fflag, struct thread *td);
268#endif
269
270struct g_ioctl {
271 u_long cmd;
272 void *data;
273 int fflag;
274 struct thread *td;
275 d_ioctl_t *func;
276 void *dev;
277};
278
279#ifdef _KERNEL
280
281struct g_kerneldump {
282 off_t offset;
283 off_t length;
284};
285
286MALLOC_DECLARE(M_GEOM);
287
288static __inline void *
289g_malloc(int size, int flags)
290{
291 void *p;
292
293 p = malloc(size, M_GEOM, flags);
294 g_sanity(p);
295 /* printf("malloc(%d, %x) -> %p\n", size, flags, p); */
296 return (p);
297}
298
299static __inline void
300g_free(void *ptr)
301{
302 g_sanity(ptr);
303 /* printf("free(%p)\n", ptr); */
304 free(ptr, M_GEOM);
305}
306
307extern struct sx topology_lock;
308
309#define g_topology_lock() \
310 do { \
311 mtx_assert(&Giant, MA_NOTOWNED); \
312 sx_xlock(&topology_lock); \
313 } while (0)
314
315#define g_topology_unlock() \
316 do { \
317 g_sanity(NULL); \
318 sx_xunlock(&topology_lock); \
319 } while (0)
320
321#define g_topology_assert() \
322 do { \
323 g_sanity(NULL); \
324 sx_assert(&topology_lock, SX_XLOCKED); \
325 } while (0)
326
327#define DECLARE_GEOM_CLASS_INIT(class, name, init) \
328 SYSINIT(name, SI_SUB_DRIVERS, SI_ORDER_FIRST, init, NULL);
329
330#define DECLARE_GEOM_CLASS(class, name) \
331 static void \
332 name##init(void) \
333 { \
334 mtx_unlock(&Giant); \
335 g_add_class(&class); \
336 mtx_lock(&Giant); \
337 } \
338 DECLARE_GEOM_CLASS_INIT(class, name, name##init);
339
340#endif /* _KERNEL */
341
342/*
343 * IOCTLS for talking to the geom.ctl device.
344 */
345
346/*
347 * This is the structure used internally in the kernel, it is created and
348 * populated by geom_ctl.c.
349 */
350struct g_configargs {
351 /* Valid on call */
352 struct g_class *class;
353 struct g_geom *geom;
354 struct g_provider *provider;
355 u_int flag;
356 u_int len;
357 void *ptr;
358};
359
360/*
361 * This is the structure used to communicate with userland.
362 */
363struct geomconfiggeom {
364 /* Valid on call */
365 struct geomidorname class;
366 struct geomidorname geom;
367 struct geomidorname provider;
368 u_int flag;
369 u_int len;
370 void *ptr;
371};
372
373#define GEOMCONFIGGEOM _IOW('G', 0, struct geomconfiggeom)
374
375#define GCFG_GENERIC0 0x00000000
376 /*
377 * Generic requests suitable for all classes.
378 */
379#define GCFG_CLASS0 0x10000000
380 /*
381 * Class specific verbs. Allocations in this part of the numberspace
382 * can only be done after review and approval of phk@FreeBSD.org.
383 * All allocations in this space will be listed in this file.
384 */
385#define GCFG_PRIVATE0 0x20000000
386 /*
387 * Lowest allocation for private flag definitions.
388 * If you define you own private "verbs", please express them in
389 * your code as (GCFG_PRIVATE0 + somenumber), where somenumber is
390 * a magic number in the range [0x0 ... 0xfffffff] chosen the way
391 * magic numbers are chosen. Such allocation SHALL NOT be listed
392 * here but SHOULD be listed in some suitable .h file.
393 */
394#define GCFG_RESERVED0 0x30000000
395#define GCFG_RESERVEDN 0xffffffff
396 /*
397 * This area is reserved for the future.
398 */
399
400#define GCFG_CREATE (GCFG_GENERIC0 + 0x0)
401 /*
402 * Request geom construction.
403 * ptr/len is class-specific.
404 */
405#define GCFG_DISMANTLE (GCFG_GENERIC0 + 0x1)
406 /*
407 * Request orderly geom dismantling.
408 * ptr/len is class-specific.
409 */
410
411
412struct gcfg_magicrw {
413 off_t offset;
414 u_int len;
415};
416
417#define GCFG_MAGICREAD (GCFG_GENERIC0 + 0x100)
418 /*
419 * Read of magic spaces.
420 * ptr/len is gcfgmagicrw structure followed by bufferspace
421 * for data to be read.
422 */
423#define GCFG_MAGICWRITE (GCFG_GENERIC0 + 0x101)
424 /*
425 * Write of magic spaces.
426 * as above, only the other way.
427 */
428
429
430/* geom_enc.c */
431uint16_t g_dec_be2(const u_char *p);
432uint32_t g_dec_be4(const u_char *p);
433uint16_t g_dec_le2(const u_char *p);
434uint32_t g_dec_le4(const u_char *p);
435uint64_t g_dec_le8(const u_char *p);
436void g_enc_le2(u_char *p, uint16_t u);
437void g_enc_le4(u_char *p, uint32_t u);
438void g_enc_le8(u_char *p, uint64_t u);
439
440#endif /* _GEOM_GEOM_H_ */
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