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5df7e9d8 MM |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
1d3ba0bf | 9 | * or https://opensource.org/licenses/CDDL-1.0. |
5df7e9d8 MM |
10 | * See the License for the specific language governing permissions |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | ||
22 | #ifndef _SYS_ZVOL_IMPL_H | |
23 | #define _SYS_ZVOL_IMPL_H | |
24 | ||
25 | #include <sys/zfs_context.h> | |
26 | ||
27 | #define ZVOL_RDONLY 0x1 | |
28 | /* | |
29 | * Whether the zvol has been written to (as opposed to ZVOL_RDONLY, which | |
30 | * specifies whether or not the zvol _can_ be written to) | |
31 | */ | |
32 | #define ZVOL_WRITTEN_TO 0x2 | |
33 | ||
34 | #define ZVOL_DUMPIFIED 0x4 | |
35 | ||
36 | #define ZVOL_EXCL 0x8 | |
37 | ||
38 | /* | |
39 | * The in-core state of each volume. | |
40 | */ | |
41 | typedef struct zvol_state { | |
42 | char zv_name[MAXNAMELEN]; /* name */ | |
43 | uint64_t zv_volsize; /* advertised space */ | |
44 | uint64_t zv_volblocksize; /* volume block size */ | |
45 | objset_t *zv_objset; /* objset handle */ | |
46 | uint32_t zv_flags; /* ZVOL_* flags */ | |
47 | uint32_t zv_open_count; /* open counts */ | |
48 | uint32_t zv_changed; /* disk changed */ | |
0ca45cb3 | 49 | uint32_t zv_volmode; /* volmode */ |
5df7e9d8 | 50 | zilog_t *zv_zilog; /* ZIL handle */ |
bd4dde8e | 51 | zfs_rangelock_t zv_rangelock; /* for range locking */ |
5df7e9d8 | 52 | dnode_t *zv_dn; /* dnode hold */ |
4547fc4e | 53 | dataset_kstats_t zv_kstat; /* zvol kstats */ |
5df7e9d8 MM |
54 | list_node_t zv_next; /* next zvol_state_t linkage */ |
55 | uint64_t zv_hash; /* name hash */ | |
56 | struct hlist_node zv_hlink; /* hash link */ | |
57 | kmutex_t zv_state_lock; /* protects zvol_state_t */ | |
58 | atomic_t zv_suspend_ref; /* refcount for suspend */ | |
59 | krwlock_t zv_suspend_lock; /* suspend lock */ | |
60 | struct zvol_state_os *zv_zso; /* private platform state */ | |
60387fac | 61 | boolean_t zv_threading; /* volthreading property */ |
5df7e9d8 MM |
62 | } zvol_state_t; |
63 | ||
64 | ||
5df7e9d8 MM |
65 | extern krwlock_t zvol_state_lock; |
66 | #define ZVOL_HT_SIZE 1024 | |
67 | extern struct hlist_head *zvol_htable; | |
68 | #define ZVOL_HT_HEAD(hash) (&zvol_htable[(hash) & (ZVOL_HT_SIZE-1)]) | |
18168da7 | 69 | extern zil_replay_func_t *const zvol_replay_vector[TX_MAX_TYPE]; |
5df7e9d8 MM |
70 | |
71 | extern unsigned int zvol_volmode; | |
72 | extern unsigned int zvol_inhibit_dev; | |
73 | ||
74 | /* | |
75 | * platform independent functions exported to platform code | |
76 | */ | |
77 | zvol_state_t *zvol_find_by_name_hash(const char *name, | |
78 | uint64_t hash, int mode); | |
79 | int zvol_first_open(zvol_state_t *zv, boolean_t readonly); | |
80 | uint64_t zvol_name_hash(const char *name); | |
81 | void zvol_remove_minors_impl(const char *name); | |
82 | void zvol_last_close(zvol_state_t *zv); | |
83 | void zvol_insert(zvol_state_t *zv); | |
84 | void zvol_log_truncate(zvol_state_t *zv, dmu_tx_t *tx, uint64_t off, | |
c3773de1 | 85 | uint64_t len); |
5df7e9d8 | 86 | void zvol_log_write(zvol_state_t *zv, dmu_tx_t *tx, uint64_t offset, |
c3773de1 | 87 | uint64_t size, boolean_t commit); |
296a4a36 CC |
88 | int zvol_get_data(void *arg, uint64_t arg2, lr_write_t *lr, char *buf, |
89 | struct lwb *lwb, zio_t *zio); | |
5df7e9d8 MM |
90 | int zvol_init_impl(void); |
91 | void zvol_fini_impl(void); | |
0ca45cb3 | 92 | void zvol_wait_close(zvol_state_t *zv); |
5df7e9d8 MM |
93 | |
94 | /* | |
95 | * platform dependent functions exported to platform independent code | |
96 | */ | |
1dccfd7a CS |
97 | void zvol_os_free(zvol_state_t *zv); |
98 | void zvol_os_rename_minor(zvol_state_t *zv, const char *newname); | |
99 | int zvol_os_create_minor(const char *name); | |
100 | int zvol_os_update_volsize(zvol_state_t *zv, uint64_t volsize); | |
101 | boolean_t zvol_os_is_zvol(const char *path); | |
102 | void zvol_os_clear_private(zvol_state_t *zv); | |
103 | void zvol_os_set_disk_ro(zvol_state_t *zv, int flags); | |
104 | void zvol_os_set_capacity(zvol_state_t *zv, uint64_t capacity); | |
5df7e9d8 MM |
105 | |
106 | #endif |