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