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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Internal header file for device mapper | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Sistina Software | |
2b06cfff | 5 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
1da177e4 LT |
6 | * |
7 | * This file is released under the LGPL. | |
8 | */ | |
9 | ||
10 | #ifndef DM_INTERNAL_H | |
11 | #define DM_INTERNAL_H | |
12 | ||
13 | #include <linux/fs.h> | |
14 | #include <linux/device-mapper.h> | |
15 | #include <linux/list.h> | |
16 | #include <linux/blkdev.h> | |
3ac51e74 | 17 | #include <linux/hdreg.h> |
1da177e4 | 18 | |
a3d77d35 KU |
19 | /* |
20 | * Suspend feature flags | |
21 | */ | |
22 | #define DM_SUSPEND_LOCKFS_FLAG (1 << 0) | |
81fdb096 | 23 | #define DM_SUSPEND_NOFLUSH_FLAG (1 << 1) |
a3d77d35 | 24 | |
1f4e0ff0 AK |
25 | /* |
26 | * Status feature flags | |
27 | */ | |
28 | #define DM_STATUS_NOFLUSH_FLAG (1 << 0) | |
29 | ||
e6ee8c0b KU |
30 | /* |
31 | * Type of table and mapped_device's mempool | |
32 | */ | |
33 | #define DM_TYPE_NONE 0 | |
34 | #define DM_TYPE_BIO_BASED 1 | |
35 | #define DM_TYPE_REQUEST_BASED 2 | |
36 | ||
1da177e4 LT |
37 | /* |
38 | * List of devices that a metadevice uses and should open/close. | |
39 | */ | |
82b1519b | 40 | struct dm_dev_internal { |
1da177e4 | 41 | struct list_head list; |
1da177e4 | 42 | atomic_t count; |
82b1519b | 43 | struct dm_dev dm_dev; |
1da177e4 LT |
44 | }; |
45 | ||
46 | struct dm_table; | |
e6ee8c0b | 47 | struct dm_md_mempools; |
1da177e4 LT |
48 | |
49 | /*----------------------------------------------------------------- | |
17b2f66f | 50 | * Internal table functions. |
1da177e4 | 51 | *---------------------------------------------------------------*/ |
d5816876 | 52 | void dm_table_destroy(struct dm_table *t); |
1da177e4 LT |
53 | void dm_table_event_callback(struct dm_table *t, |
54 | void (*fn)(void *), void *context); | |
1da177e4 LT |
55 | struct dm_target *dm_table_get_target(struct dm_table *t, unsigned int index); |
56 | struct dm_target *dm_table_find_target(struct dm_table *t, sector_t sector); | |
3ae70656 | 57 | bool dm_table_has_no_data_devices(struct dm_table *table); |
754c5fc7 MS |
58 | int dm_calculate_queue_limits(struct dm_table *table, |
59 | struct queue_limits *limits); | |
60 | void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, | |
61 | struct queue_limits *limits); | |
1da177e4 | 62 | struct list_head *dm_table_get_devices(struct dm_table *t); |
1da177e4 LT |
63 | void dm_table_presuspend_targets(struct dm_table *t); |
64 | void dm_table_postsuspend_targets(struct dm_table *t); | |
8757b776 | 65 | int dm_table_resume_targets(struct dm_table *t); |
1da177e4 | 66 | int dm_table_any_congested(struct dm_table *t, int bdi_bits); |
cec47e3d | 67 | int dm_table_any_busy_target(struct dm_table *t); |
e6ee8c0b | 68 | unsigned dm_table_get_type(struct dm_table *t); |
36a0456f | 69 | struct target_type *dm_table_get_immutable_target_type(struct dm_table *t); |
e6ee8c0b | 70 | bool dm_table_request_based(struct dm_table *t); |
5ae89a87 | 71 | bool dm_table_supports_discards(struct dm_table *t); |
e6ee8c0b KU |
72 | int dm_table_alloc_md_mempools(struct dm_table *t); |
73 | void dm_table_free_md_mempools(struct dm_table *t); | |
74 | struct dm_md_mempools *dm_table_get_md_mempools(struct dm_table *t); | |
1da177e4 | 75 | |
d5b9dd04 MP |
76 | int dm_queue_merge_is_compulsory(struct request_queue *q); |
77 | ||
a5664dad MS |
78 | void dm_lock_md_type(struct mapped_device *md); |
79 | void dm_unlock_md_type(struct mapped_device *md); | |
80 | void dm_set_md_type(struct mapped_device *md, unsigned type); | |
81 | unsigned dm_get_md_type(struct mapped_device *md); | |
36a0456f | 82 | struct target_type *dm_get_immutable_target_type(struct mapped_device *md); |
a5664dad | 83 | |
4a0b4ddf MS |
84 | int dm_setup_md_queue(struct mapped_device *md); |
85 | ||
512875bd JN |
86 | /* |
87 | * To check the return value from dm_table_find_target(). | |
88 | */ | |
89 | #define dm_target_is_valid(t) ((t)->table) | |
90 | ||
e6ee8c0b KU |
91 | /* |
92 | * To check whether the target type is request-based or not (bio-based). | |
93 | */ | |
94 | #define dm_target_request_based(t) ((t)->type->map_rq != NULL) | |
95 | ||
1da177e4 LT |
96 | /*----------------------------------------------------------------- |
97 | * A registry of target types. | |
98 | *---------------------------------------------------------------*/ | |
99 | int dm_target_init(void); | |
100 | void dm_target_exit(void); | |
101 | struct target_type *dm_get_target_type(const char *name); | |
45194e4f | 102 | void dm_put_target_type(struct target_type *tt); |
1da177e4 LT |
103 | int dm_target_iterate(void (*iter_func)(struct target_type *tt, |
104 | void *param), void *param); | |
105 | ||
1da177e4 LT |
106 | int dm_split_args(int *argc, char ***argvp, char *input); |
107 | ||
432a212c MA |
108 | /* |
109 | * Is this mapped_device being deleted? | |
110 | */ | |
111 | int dm_deleting_md(struct mapped_device *md); | |
112 | ||
4f186f8b KU |
113 | /* |
114 | * Is this mapped_device suspended? | |
115 | */ | |
116 | int dm_suspended_md(struct mapped_device *md); | |
117 | ||
1da177e4 LT |
118 | /* |
119 | * The device-mapper can be driven through one of two interfaces; | |
120 | * ioctl or filesystem, depending which patch you have applied. | |
121 | */ | |
122 | int dm_interface_init(void); | |
123 | void dm_interface_exit(void); | |
124 | ||
784aae73 MB |
125 | /* |
126 | * sysfs interface | |
127 | */ | |
128 | int dm_sysfs_init(struct mapped_device *md); | |
129 | void dm_sysfs_exit(struct mapped_device *md); | |
130 | struct kobject *dm_kobject(struct mapped_device *md); | |
131 | struct mapped_device *dm_get_from_kobject(struct kobject *kobj); | |
132 | ||
1da177e4 LT |
133 | /* |
134 | * Targets for linear and striped mappings | |
135 | */ | |
136 | int dm_linear_init(void); | |
137 | void dm_linear_exit(void); | |
138 | ||
139 | int dm_stripe_init(void); | |
140 | void dm_stripe_exit(void); | |
141 | ||
3f77316d KU |
142 | /* |
143 | * mapped_device operations | |
144 | */ | |
145 | void dm_destroy(struct mapped_device *md); | |
146 | void dm_destroy_immediate(struct mapped_device *md); | |
5c6bd75d AK |
147 | int dm_open_count(struct mapped_device *md); |
148 | int dm_lock_for_deletion(struct mapped_device *md); | |
1da177e4 | 149 | |
3abf85b5 PR |
150 | int dm_kobject_uevent(struct mapped_device *md, enum kobject_action action, |
151 | unsigned cookie); | |
69267a30 | 152 | |
952b3557 MP |
153 | int dm_io_init(void); |
154 | void dm_io_exit(void); | |
155 | ||
945fa4d2 MP |
156 | int dm_kcopyd_init(void); |
157 | void dm_kcopyd_exit(void); | |
158 | ||
e6ee8c0b KU |
159 | /* |
160 | * Mempool operations | |
161 | */ | |
a91a2785 | 162 | struct dm_md_mempools *dm_alloc_md_mempools(unsigned type, unsigned integrity); |
e6ee8c0b KU |
163 | void dm_free_md_mempools(struct dm_md_mempools *pools); |
164 | ||
1da177e4 | 165 | #endif |