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 | |
1da177e4 LT |
25 | /* |
26 | * List of devices that a metadevice uses and should open/close. | |
27 | */ | |
82b1519b | 28 | struct dm_dev_internal { |
1da177e4 | 29 | struct list_head list; |
1da177e4 | 30 | atomic_t count; |
82b1519b | 31 | struct dm_dev dm_dev; |
1da177e4 LT |
32 | }; |
33 | ||
34 | struct dm_table; | |
1da177e4 LT |
35 | |
36 | /*----------------------------------------------------------------- | |
17b2f66f | 37 | * Internal table functions. |
1da177e4 | 38 | *---------------------------------------------------------------*/ |
d5816876 | 39 | void dm_table_destroy(struct dm_table *t); |
1da177e4 LT |
40 | void dm_table_event_callback(struct dm_table *t, |
41 | void (*fn)(void *), void *context); | |
1da177e4 LT |
42 | struct dm_target *dm_table_get_target(struct dm_table *t, unsigned int index); |
43 | struct dm_target *dm_table_find_target(struct dm_table *t, sector_t sector); | |
754c5fc7 MS |
44 | int dm_calculate_queue_limits(struct dm_table *table, |
45 | struct queue_limits *limits); | |
46 | void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, | |
47 | struct queue_limits *limits); | |
1da177e4 | 48 | struct list_head *dm_table_get_devices(struct dm_table *t); |
1da177e4 LT |
49 | void dm_table_presuspend_targets(struct dm_table *t); |
50 | void dm_table_postsuspend_targets(struct dm_table *t); | |
8757b776 | 51 | int dm_table_resume_targets(struct dm_table *t); |
1da177e4 | 52 | int dm_table_any_congested(struct dm_table *t, int bdi_bits); |
cec47e3d | 53 | int dm_table_any_busy_target(struct dm_table *t); |
1da177e4 | 54 | |
512875bd JN |
55 | /* |
56 | * To check the return value from dm_table_find_target(). | |
57 | */ | |
58 | #define dm_target_is_valid(t) ((t)->table) | |
59 | ||
1da177e4 LT |
60 | /*----------------------------------------------------------------- |
61 | * A registry of target types. | |
62 | *---------------------------------------------------------------*/ | |
63 | int dm_target_init(void); | |
64 | void dm_target_exit(void); | |
65 | struct target_type *dm_get_target_type(const char *name); | |
45194e4f | 66 | void dm_put_target_type(struct target_type *tt); |
1da177e4 LT |
67 | int dm_target_iterate(void (*iter_func)(struct target_type *tt, |
68 | void *param), void *param); | |
69 | ||
1da177e4 LT |
70 | int dm_split_args(int *argc, char ***argvp, char *input); |
71 | ||
72 | /* | |
73 | * The device-mapper can be driven through one of two interfaces; | |
74 | * ioctl or filesystem, depending which patch you have applied. | |
75 | */ | |
76 | int dm_interface_init(void); | |
77 | void dm_interface_exit(void); | |
78 | ||
784aae73 MB |
79 | /* |
80 | * sysfs interface | |
81 | */ | |
82 | int dm_sysfs_init(struct mapped_device *md); | |
83 | void dm_sysfs_exit(struct mapped_device *md); | |
84 | struct kobject *dm_kobject(struct mapped_device *md); | |
85 | struct mapped_device *dm_get_from_kobject(struct kobject *kobj); | |
86 | ||
1da177e4 LT |
87 | /* |
88 | * Targets for linear and striped mappings | |
89 | */ | |
90 | int dm_linear_init(void); | |
91 | void dm_linear_exit(void); | |
92 | ||
93 | int dm_stripe_init(void); | |
94 | void dm_stripe_exit(void); | |
95 | ||
5c6bd75d AK |
96 | int dm_open_count(struct mapped_device *md); |
97 | int dm_lock_for_deletion(struct mapped_device *md); | |
1da177e4 | 98 | |
60935eb2 MB |
99 | void dm_kobject_uevent(struct mapped_device *md, enum kobject_action action, |
100 | unsigned cookie); | |
69267a30 | 101 | |
945fa4d2 MP |
102 | int dm_kcopyd_init(void); |
103 | void dm_kcopyd_exit(void); | |
104 | ||
1da177e4 | 105 | #endif |