| /* |
| * 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 list_t zvol_state_list; |
| 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 *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 |