267 lines
7.9 KiB
C
267 lines
7.9 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/sx.h>
|
|
#include <sys/queue.h>
|
|
|
|
#ifndef _KERNEL
|
|
/*
|
|
* The GEOM subsystem makes a few concessions in order to be able to run as a
|
|
* user-land simulation as well as a kernel component.
|
|
*/
|
|
#include <geom_sim.h>
|
|
#endif
|
|
|
|
struct g_class;
|
|
struct g_geom;
|
|
struct g_consumer;
|
|
struct g_provider;
|
|
struct g_event;
|
|
struct thread;
|
|
struct bio;
|
|
struct sbuf;
|
|
|
|
|
|
typedef struct g_geom * g_create_geom_t (struct g_class *mp,
|
|
struct g_provider *pp, char *name);
|
|
typedef struct g_geom * g_taste_t (struct g_class *, struct g_provider *,
|
|
int flags);
|
|
#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 *, 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 create_geom functions.
|
|
*/
|
|
struct g_class {
|
|
char *name;
|
|
g_taste_t *taste;
|
|
g_create_geom_t *create_geom;
|
|
/*
|
|
* The remaning elements are private and classes should use
|
|
* the G_CLASS_INITSTUFF macro to initialize them.
|
|
*/
|
|
LIST_ENTRY(g_class) class;
|
|
LIST_HEAD(,g_geom) geom;
|
|
struct g_event *event;
|
|
};
|
|
|
|
#define G_CLASS_INITSTUFF { 0, 0 }, { 0 }, 0
|
|
|
|
/*
|
|
* 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;
|
|
void *softc;
|
|
struct g_event *event;
|
|
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;
|
|
struct g_event *event;
|
|
|
|
int biocount;
|
|
int spoiled;
|
|
};
|
|
|
|
/*
|
|
* 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;
|
|
struct g_event *event;
|
|
TAILQ_ENTRY(g_provider) orphan;
|
|
int index;
|
|
};
|
|
|
|
/* geom_dump.c */
|
|
void g_hexdump(void *ptr, int length);
|
|
void g_trace(int level, char *, ...);
|
|
# define G_T_TOPOLOGY 1
|
|
# define G_T_BIO 2
|
|
# define G_T_ACCESS 4
|
|
|
|
/* geom_enc.c */
|
|
uint32_t g_dec_be2(u_char *p);
|
|
uint32_t g_dec_be4(u_char *p);
|
|
uint32_t g_dec_le2(u_char *p);
|
|
uint32_t g_dec_le4(u_char *p);
|
|
void g_enc_le4(u_char *p, uint32_t u);
|
|
|
|
/* geom_event.c */
|
|
void g_orphan_provider(struct g_provider *pp, int error);
|
|
void g_rattle(void);
|
|
void g_silence(void);
|
|
|
|
/* geom_subr.c */
|
|
int g_access_abs(struct g_consumer *cp, int read, int write, int exclusive);
|
|
int g_access_rel(struct g_consumer *cp, int read, int write, int exclusive);
|
|
void g_add_class(struct g_class *mp);
|
|
int g_attach(struct g_consumer *cp, struct g_provider *pp);
|
|
struct g_geom *g_create_geomf(char *class, struct g_provider *, char *fmt, ...);
|
|
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_dettach(struct g_consumer *cp);
|
|
void g_error_provider(struct g_provider *pp, int error);
|
|
int g_haveattr(struct bio *bp, char *attribute, void *val, int len);
|
|
int g_haveattr_int(struct bio *bp, char *attribute, int val);
|
|
int g_haveattr_off_t(struct bio *bp, char *attribute, off_t val);
|
|
struct g_geom * g_insert_geom(char *class, struct g_consumer *cp);
|
|
struct g_consumer * g_new_consumer(struct g_geom *gp);
|
|
struct g_geom * g_new_geomf(struct g_class *mp, char *fmt, ...);
|
|
struct g_provider * g_new_providerf(struct g_geom *gp, 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);
|
|
|
|
/* geom_io.c */
|
|
struct bio * g_clone_bio(struct bio *);
|
|
void g_destroy_bio(struct bio *);
|
|
void g_io_deliver(struct bio *bp);
|
|
void g_io_fail(struct bio *bp, int error);
|
|
int g_io_getattr(char *attr, struct g_consumer *cp, int *len, void *ptr);
|
|
void g_io_request(struct bio *bp, struct g_consumer *cp);
|
|
int g_io_setattr(char *attr, struct g_consumer *cp, int len, void *ptr);
|
|
struct bio *g_new_bio(void);
|
|
void * g_read_data(struct g_consumer *cp, off_t offset, off_t length, int *error);
|
|
|
|
/* geom_kern.c / geom_kernsim.c */
|
|
|
|
struct g_ioctl {
|
|
u_long cmd;
|
|
void *data;
|
|
int fflag;
|
|
struct thread *td;
|
|
};
|
|
|
|
#ifdef _KERNEL
|
|
|
|
MALLOC_DECLARE(M_GEOM);
|
|
|
|
static __inline void *
|
|
g_malloc(int size, int flags)
|
|
{
|
|
void *p;
|
|
|
|
mtx_lock(&Giant);
|
|
p = malloc(size, M_GEOM, flags);
|
|
mtx_unlock(&Giant);
|
|
return (p);
|
|
}
|
|
|
|
static __inline void
|
|
g_free(void *ptr)
|
|
{
|
|
mtx_lock(&Giant);
|
|
free(ptr, M_GEOM);
|
|
mtx_unlock(&Giant);
|
|
}
|
|
|
|
extern struct sx topology_lock;
|
|
#define g_topology_lock() do { mtx_assert(&Giant, MA_NOTOWNED); sx_xlock(&topology_lock); } while (0)
|
|
#define g_topology_unlock() sx_xunlock(&topology_lock)
|
|
#define g_topology_assert() sx_assert(&topology_lock, SX_XLOCKED)
|
|
|
|
#define DECLARE_GEOM_CLASS(class, name) \
|
|
static void \
|
|
name##init(void) \
|
|
{ \
|
|
mtx_unlock(&Giant); \
|
|
g_add_class(&class); \
|
|
mtx_lock(&Giant); \
|
|
} \
|
|
SYSINIT(name, SI_SUB_PSEUDO, SI_ORDER_FIRST, name##init, NULL);
|
|
|
|
#endif
|
|
|