mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-16 10:20:30 +00:00
54bab03f04
No objection from: phk
349 lines
11 KiB
C
349 lines
11 KiB
C
/*-
|
|
* Copyright (c) 2002 Poul-Henning Kamp
|
|
* Copyright (c) 2002 Networks Associates Technology, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed for the FreeBSD Project by Poul-Henning Kamp
|
|
* and NAI Labs, the Security Research Division of Network Associates, Inc.
|
|
* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
|
|
* DARPA CHATS research program.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The names of the authors may not be used to endorse or promote
|
|
* products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _GEOM_GEOM_H_
|
|
#define _GEOM_GEOM_H_
|
|
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/sx.h>
|
|
#include <sys/queue.h>
|
|
#include <sys/ioccom.h>
|
|
#include <sys/sbuf.h>
|
|
#include <sys/module.h>
|
|
|
|
struct g_class;
|
|
struct g_geom;
|
|
struct g_consumer;
|
|
struct g_provider;
|
|
struct g_stat;
|
|
struct thread;
|
|
struct bio;
|
|
struct sbuf;
|
|
struct gctl_req;
|
|
struct g_configargs;
|
|
|
|
typedef int g_config_t (struct g_configargs *ca);
|
|
typedef void g_ctl_req_t (struct gctl_req *, struct g_class *cp, char const *verb);
|
|
typedef int g_ctl_create_geom_t (struct gctl_req *, struct g_class *cp, struct g_provider *pp);
|
|
typedef int g_ctl_destroy_geom_t (struct gctl_req *, struct g_class *cp, struct g_geom *gp);
|
|
typedef int g_ctl_config_geom_t (struct gctl_req *, struct g_geom *gp, const char *verb);
|
|
typedef void g_init_t (struct g_class *mp);
|
|
typedef void g_fini_t (struct g_class *mp);
|
|
typedef struct g_geom * g_taste_t (struct g_class *, struct g_provider *, int flags);
|
|
typedef int g_ioctl_t(struct g_provider *pp, u_long cmd, void *data, int fflag, struct thread *td);
|
|
#define G_TF_NORMAL 0
|
|
#define G_TF_INSIST 1
|
|
#define G_TF_TRANSPARENT 2
|
|
typedef int g_access_t (struct g_provider *, int, int, int);
|
|
/* XXX: not sure about the thread arg */
|
|
typedef void g_orphan_t (struct g_consumer *);
|
|
|
|
typedef void g_start_t (struct bio *);
|
|
typedef void g_spoiled_t (struct g_consumer *);
|
|
typedef void g_dumpconf_t (struct sbuf *, const char *indent, struct g_geom *,
|
|
struct g_consumer *, struct g_provider *);
|
|
|
|
/*
|
|
* The g_class structure describes a transformation class. In other words
|
|
* all BSD disklabel handlers share one g_class, all MBR handlers share
|
|
* one common g_class and so on.
|
|
* Certain operations are instantiated on the class, most notably the
|
|
* taste and config_geom functions.
|
|
*/
|
|
struct g_class {
|
|
const char *name;
|
|
u_int version;
|
|
g_taste_t *taste;
|
|
g_config_t *config;
|
|
g_ctl_req_t *ctlreq;
|
|
g_init_t *init;
|
|
g_fini_t *fini;
|
|
g_ctl_destroy_geom_t *destroy_geom;
|
|
/*
|
|
* Defaults values for geom methods
|
|
*/
|
|
g_start_t *start;
|
|
g_spoiled_t *spoiled;
|
|
g_dumpconf_t *dumpconf;
|
|
g_access_t *access;
|
|
g_orphan_t *orphan;
|
|
g_ioctl_t *ioctl;
|
|
/*
|
|
* The remaining elements are private
|
|
*/
|
|
LIST_ENTRY(g_class) class;
|
|
LIST_HEAD(,g_geom) geom;
|
|
};
|
|
|
|
#define G_VERSION_00 0x19950323
|
|
#define G_VERSION_01 0x20041207 /* add fflag to g_ioctl_t */
|
|
#define G_VERSION G_VERSION_01
|
|
|
|
/*
|
|
* The g_geom is an instance of a g_class.
|
|
*/
|
|
struct g_geom {
|
|
char *name;
|
|
struct g_class *class;
|
|
LIST_ENTRY(g_geom) geom;
|
|
LIST_HEAD(,g_consumer) consumer;
|
|
LIST_HEAD(,g_provider) provider;
|
|
TAILQ_ENTRY(g_geom) geoms; /* XXX: better name */
|
|
int rank;
|
|
g_start_t *start;
|
|
g_spoiled_t *spoiled;
|
|
g_dumpconf_t *dumpconf;
|
|
g_access_t *access;
|
|
g_orphan_t *orphan;
|
|
g_ioctl_t *ioctl;
|
|
void *softc;
|
|
unsigned flags;
|
|
#define G_GEOM_WITHER 1
|
|
};
|
|
|
|
/*
|
|
* The g_bioq is a queue of struct bio's.
|
|
* XXX: possibly collection point for statistics.
|
|
* XXX: should (possibly) be collapsed with sys/bio.h::bio_queue_head.
|
|
*/
|
|
struct g_bioq {
|
|
TAILQ_HEAD(, bio) bio_queue;
|
|
struct mtx bio_queue_lock;
|
|
int bio_queue_length;
|
|
};
|
|
|
|
/*
|
|
* A g_consumer is an attachment point for a g_provider. One g_consumer
|
|
* can only be attached to one g_provider, but multiple g_consumers
|
|
* can be attached to one g_provider.
|
|
*/
|
|
|
|
struct g_consumer {
|
|
struct g_geom *geom;
|
|
LIST_ENTRY(g_consumer) consumer;
|
|
struct g_provider *provider;
|
|
LIST_ENTRY(g_consumer) consumers; /* XXX: better name */
|
|
int acr, acw, ace;
|
|
int spoiled;
|
|
struct devstat *stat;
|
|
u_int nstart, nend;
|
|
|
|
/* Two fields for the implementing class to use */
|
|
void *private;
|
|
u_int index;
|
|
};
|
|
|
|
/*
|
|
* A g_provider is a "logical disk".
|
|
*/
|
|
struct g_provider {
|
|
char *name;
|
|
LIST_ENTRY(g_provider) provider;
|
|
struct g_geom *geom;
|
|
LIST_HEAD(,g_consumer) consumers;
|
|
int acr, acw, ace;
|
|
int error;
|
|
TAILQ_ENTRY(g_provider) orphan;
|
|
off_t mediasize;
|
|
u_int sectorsize;
|
|
u_int stripesize;
|
|
u_int stripeoffset;
|
|
struct devstat *stat;
|
|
u_int nstart, nend;
|
|
u_int flags;
|
|
#define G_PF_CANDELETE 0x1
|
|
#define G_PF_WITHER 0x2
|
|
#define G_PF_ORPHAN 0x4
|
|
|
|
/* Two fields for the implementing class to use */
|
|
void *private;
|
|
u_int index;
|
|
};
|
|
|
|
/* geom_dev.c */
|
|
struct cdev;
|
|
void g_dev_print(void);
|
|
struct g_provider *g_dev_getprovider(struct cdev *dev);
|
|
|
|
/* geom_dump.c */
|
|
void g_trace(int level, const char *, ...);
|
|
# define G_T_TOPOLOGY 1
|
|
# define G_T_BIO 2
|
|
# define G_T_ACCESS 4
|
|
|
|
|
|
/* geom_event.c */
|
|
typedef void g_event_t(void *, int flag);
|
|
#define EV_CANCEL 1
|
|
int g_post_event(g_event_t *func, void *arg, int flag, ...);
|
|
int g_waitfor_event(g_event_t *func, void *arg, int flag, ...);
|
|
void g_cancel_event(void *ref);
|
|
void g_orphan_provider(struct g_provider *pp, int error);
|
|
void g_waitidlelock(void);
|
|
|
|
/* geom_subr.c */
|
|
int g_access(struct g_consumer *cp, int nread, int nwrite, int nexcl);
|
|
int g_attach(struct g_consumer *cp, struct g_provider *pp);
|
|
void g_destroy_consumer(struct g_consumer *cp);
|
|
void g_destroy_geom(struct g_geom *pp);
|
|
void g_destroy_provider(struct g_provider *pp);
|
|
void g_detach(struct g_consumer *cp);
|
|
void g_error_provider(struct g_provider *pp, int error);
|
|
struct g_provider *g_provider_by_name(char const *arg);
|
|
int g_getattr__(const char *attr, struct g_consumer *cp, void *var, int len);
|
|
#define g_getattr(a, c, v) g_getattr__((a), (c), (v), sizeof *(v))
|
|
int g_handleattr(struct bio *bp, const char *attribute, void *val, int len);
|
|
int g_handleattr_int(struct bio *bp, const char *attribute, int val);
|
|
int g_handleattr_off_t(struct bio *bp, const char *attribute, off_t val);
|
|
struct g_consumer * g_new_consumer(struct g_geom *gp);
|
|
struct g_geom * g_new_geomf(struct g_class *mp, const char *fmt, ...);
|
|
struct g_provider * g_new_providerf(struct g_geom *gp, const char *fmt, ...);
|
|
void g_spoil(struct g_provider *pp, struct g_consumer *cp);
|
|
int g_std_access(struct g_provider *pp, int dr, int dw, int de);
|
|
void g_std_done(struct bio *bp);
|
|
void g_std_spoiled(struct g_consumer *cp);
|
|
void g_wither_geom(struct g_geom *gp, int error);
|
|
void g_wither_geom_close(struct g_geom *gp, int error);
|
|
|
|
#ifdef DIAGNOSTIC
|
|
int g_valid_obj(void const *ptr);
|
|
#define G_VALID_CLASS(foo) \
|
|
KASSERT(g_valid_obj(foo) == 1, ("%p is not a g_class", foo))
|
|
#define G_VALID_GEOM(foo) \
|
|
KASSERT(g_valid_obj(foo) == 2, ("%p is not a g_geom", foo))
|
|
#define G_VALID_CONSUMER(foo) \
|
|
KASSERT(g_valid_obj(foo) == 3, ("%p is not a g_consumer", foo))
|
|
#define G_VALID_PROVIDER(foo) \
|
|
KASSERT(g_valid_obj(foo) == 4, ("%p is not a g_provider", foo))
|
|
#else
|
|
#define G_VALID_CLASS(foo) do { } while (0)
|
|
#define G_VALID_GEOM(foo) do { } while (0)
|
|
#define G_VALID_CONSUMER(foo) do { } while (0)
|
|
#define G_VALID_PROVIDER(foo) do { } while (0)
|
|
#endif
|
|
|
|
int g_modevent(module_t, int, void *);
|
|
|
|
/* geom_io.c */
|
|
struct bio * g_clone_bio(struct bio *);
|
|
void g_destroy_bio(struct bio *);
|
|
void g_io_deliver(struct bio *bp, int error);
|
|
int g_io_getattr(const char *attr, struct g_consumer *cp, int *len, void *ptr);
|
|
void g_io_request(struct bio *bp, struct g_consumer *cp);
|
|
struct bio *g_new_bio(void);
|
|
struct bio *g_alloc_bio(void);
|
|
void * g_read_data(struct g_consumer *cp, off_t offset, off_t length, int *error);
|
|
int g_write_data(struct g_consumer *cp, off_t offset, void *ptr, off_t length);
|
|
void g_print_bio(struct bio *bp);
|
|
|
|
/* geom_kern.c / geom_kernsim.c */
|
|
|
|
#ifdef _KERNEL
|
|
|
|
struct g_kerneldump {
|
|
off_t offset;
|
|
off_t length;
|
|
};
|
|
|
|
MALLOC_DECLARE(M_GEOM);
|
|
|
|
static __inline void *
|
|
g_malloc(int size, int flags)
|
|
{
|
|
void *p;
|
|
|
|
p = malloc(size, M_GEOM, flags);
|
|
return (p);
|
|
}
|
|
|
|
static __inline void
|
|
g_free(void *ptr)
|
|
{
|
|
|
|
#ifdef DIAGNOSTIC
|
|
KASSERT(g_valid_obj(ptr) == 0,
|
|
("g_free(%p) of live object, type %d", ptr, g_valid_obj(ptr)));
|
|
#endif
|
|
free(ptr, M_GEOM);
|
|
}
|
|
|
|
extern struct sx topology_lock;
|
|
|
|
#define g_topology_lock() \
|
|
do { \
|
|
mtx_assert(&Giant, MA_NOTOWNED); \
|
|
sx_xlock(&topology_lock); \
|
|
} while (0)
|
|
|
|
#define g_topology_try_lock() sx_try_xlock(&topology_lock)
|
|
|
|
#define g_topology_unlock() \
|
|
do { \
|
|
sx_xunlock(&topology_lock); \
|
|
} while (0)
|
|
|
|
#define g_topology_assert() \
|
|
do { \
|
|
sx_assert(&topology_lock, SX_XLOCKED); \
|
|
} while (0)
|
|
|
|
#define g_topology_assert_not() \
|
|
do { \
|
|
sx_assert(&topology_lock, SX_UNLOCKED); \
|
|
} while (0)
|
|
|
|
#define DECLARE_GEOM_CLASS(class, name) \
|
|
static moduledata_t name##_mod = { \
|
|
#name, g_modevent, &class \
|
|
}; \
|
|
DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
/* geom_ctl.c */
|
|
void gctl_set_param(struct gctl_req *req, const char *param, void const *ptr, int len);
|
|
void *gctl_get_param(struct gctl_req *req, const char *param, int *len);
|
|
char const *gctl_get_asciiparam(struct gctl_req *req, const char *param);
|
|
void *gctl_get_paraml(struct gctl_req *req, const char *param, int len);
|
|
int gctl_error(struct gctl_req *req, const char *fmt, ...);
|
|
struct g_class *gctl_get_class(struct gctl_req *req, char const *arg);
|
|
struct g_geom *gctl_get_geom(struct gctl_req *req, struct g_class *mpr, char const *arg);
|
|
struct g_provider *gctl_get_provider(struct gctl_req *req, char const *arg);
|
|
|
|
#endif /* _GEOM_GEOM_H_ */
|