110 lines
3.7 KiB
C
110 lines
3.7 KiB
C
/*
|
|
* CDDL HEADER START
|
|
*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License (the "License").
|
|
* You may not use this file except in compliance with the License.
|
|
*
|
|
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
|
|
* or http://www.opensolaris.org/os/licensing.
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
*
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
|
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
|
* If applicable, add the following below this CDDL HEADER, with the
|
|
* fields enclosed by brackets "[]" replaced with your own identifying
|
|
* information: Portions Copyright [yyyy] [name of copyright owner]
|
|
*
|
|
* CDDL HEADER END
|
|
*/
|
|
|
|
#ifndef _SYS_ZVOL_IMPL_H
|
|
#define _SYS_ZVOL_IMPL_H
|
|
|
|
#include <sys/zfs_context.h>
|
|
|
|
#define ZVOL_RDONLY 0x1
|
|
/*
|
|
* Whether the zvol has been written to (as opposed to ZVOL_RDONLY, which
|
|
* specifies whether or not the zvol _can_ be written to)
|
|
*/
|
|
#define ZVOL_WRITTEN_TO 0x2
|
|
|
|
#define ZVOL_DUMPIFIED 0x4
|
|
|
|
#define ZVOL_EXCL 0x8
|
|
|
|
/*
|
|
* The in-core state of each volume.
|
|
*/
|
|
typedef struct zvol_state {
|
|
char zv_name[MAXNAMELEN]; /* name */
|
|
uint64_t zv_volsize; /* advertised space */
|
|
uint64_t zv_volblocksize; /* volume block size */
|
|
objset_t *zv_objset; /* objset handle */
|
|
uint32_t zv_flags; /* ZVOL_* flags */
|
|
uint32_t zv_open_count; /* open counts */
|
|
uint32_t zv_changed; /* disk changed */
|
|
uint32_t zv_volmode; /* volmode */
|
|
zilog_t *zv_zilog; /* ZIL handle */
|
|
zfs_rangelock_t zv_rangelock; /* for range locking */
|
|
dnode_t *zv_dn; /* dnode hold */
|
|
dataset_kstats_t zv_kstat; /* zvol kstats */
|
|
list_node_t zv_next; /* next zvol_state_t linkage */
|
|
uint64_t zv_hash; /* name hash */
|
|
struct hlist_node zv_hlink; /* hash link */
|
|
kmutex_t zv_state_lock; /* protects zvol_state_t */
|
|
atomic_t zv_suspend_ref; /* refcount for suspend */
|
|
krwlock_t zv_suspend_lock; /* suspend lock */
|
|
struct zvol_state_os *zv_zso; /* private platform state */
|
|
} zvol_state_t;
|
|
|
|
|
|
extern krwlock_t zvol_state_lock;
|
|
#define ZVOL_HT_SIZE 1024
|
|
extern struct hlist_head *zvol_htable;
|
|
#define ZVOL_HT_HEAD(hash) (&zvol_htable[(hash) & (ZVOL_HT_SIZE-1)])
|
|
extern zil_replay_func_t *const zvol_replay_vector[TX_MAX_TYPE];
|
|
|
|
extern unsigned int zvol_volmode;
|
|
extern unsigned int zvol_inhibit_dev;
|
|
|
|
/*
|
|
* platform independent functions exported to platform code
|
|
*/
|
|
zvol_state_t *zvol_find_by_name_hash(const char *name,
|
|
uint64_t hash, int mode);
|
|
int zvol_first_open(zvol_state_t *zv, boolean_t readonly);
|
|
uint64_t zvol_name_hash(const char *name);
|
|
void zvol_remove_minors_impl(const char *name);
|
|
void zvol_last_close(zvol_state_t *zv);
|
|
void zvol_insert(zvol_state_t *zv);
|
|
void zvol_log_truncate(zvol_state_t *zv, dmu_tx_t *tx, uint64_t off,
|
|
uint64_t len, boolean_t sync);
|
|
void zvol_log_write(zvol_state_t *zv, dmu_tx_t *tx, uint64_t offset,
|
|
uint64_t size, int sync);
|
|
int zvol_get_data(void *arg, uint64_t arg2, lr_write_t *lr, char *buf,
|
|
struct lwb *lwb, zio_t *zio);
|
|
int zvol_init_impl(void);
|
|
void zvol_fini_impl(void);
|
|
void zvol_wait_close(zvol_state_t *zv);
|
|
|
|
/*
|
|
* platform dependent functions exported to platform independent code
|
|
*/
|
|
typedef struct zvol_platform_ops {
|
|
void (*zv_free)(zvol_state_t *);
|
|
void (*zv_rename_minor)(zvol_state_t *, const char *);
|
|
int (*zv_create_minor)(const char *);
|
|
int (*zv_update_volsize)(zvol_state_t *, uint64_t);
|
|
boolean_t (*zv_is_zvol)(const char *);
|
|
void (*zv_clear_private)(zvol_state_t *);
|
|
void (*zv_set_disk_ro)(zvol_state_t *, int flags);
|
|
void (*zv_set_capacity)(zvol_state_t *, uint64_t capacity);
|
|
} zvol_platform_ops_t;
|
|
|
|
void zvol_register_ops(const zvol_platform_ops_t *ops);
|
|
|
|
#endif
|