]>
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 | |
1da177e4 LT |
25 | /* |
26 | * List of devices that a metadevice uses and should open/close. | |
27 | */ | |
28 | struct dm_dev { | |
29 | struct list_head list; | |
30 | ||
31 | atomic_t count; | |
32 | int mode; | |
33 | struct block_device *bdev; | |
34 | char name[16]; | |
35 | }; | |
36 | ||
37 | struct dm_table; | |
1da177e4 LT |
38 | |
39 | /*----------------------------------------------------------------- | |
17b2f66f | 40 | * Internal table functions. |
1da177e4 | 41 | *---------------------------------------------------------------*/ |
1da177e4 LT |
42 | void dm_table_event_callback(struct dm_table *t, |
43 | void (*fn)(void *), void *context); | |
1da177e4 LT |
44 | struct dm_target *dm_table_get_target(struct dm_table *t, unsigned int index); |
45 | struct dm_target *dm_table_find_target(struct dm_table *t, sector_t sector); | |
46 | void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q); | |
1da177e4 | 47 | struct list_head *dm_table_get_devices(struct dm_table *t); |
1da177e4 LT |
48 | void dm_table_presuspend_targets(struct dm_table *t); |
49 | void dm_table_postsuspend_targets(struct dm_table *t); | |
8757b776 | 50 | int dm_table_resume_targets(struct dm_table *t); |
1da177e4 LT |
51 | int dm_table_any_congested(struct dm_table *t, int bdi_bits); |
52 | void dm_table_unplug_all(struct dm_table *t); | |
1da177e4 | 53 | |
512875bd JN |
54 | /* |
55 | * To check the return value from dm_table_find_target(). | |
56 | */ | |
57 | #define dm_target_is_valid(t) ((t)->table) | |
58 | ||
1da177e4 LT |
59 | /*----------------------------------------------------------------- |
60 | * A registry of target types. | |
61 | *---------------------------------------------------------------*/ | |
62 | int dm_target_init(void); | |
63 | void dm_target_exit(void); | |
64 | struct target_type *dm_get_target_type(const char *name); | |
65 | void dm_put_target_type(struct target_type *t); | |
66 | int dm_target_iterate(void (*iter_func)(struct target_type *tt, | |
67 | void *param), void *param); | |
68 | ||
1da177e4 LT |
69 | /*----------------------------------------------------------------- |
70 | * Useful inlines. | |
71 | *---------------------------------------------------------------*/ | |
72 | static inline int array_too_big(unsigned long fixed, unsigned long obj, | |
73 | unsigned long num) | |
74 | { | |
75 | return (num > (ULONG_MAX - fixed) / obj); | |
76 | } | |
77 | ||
1da177e4 LT |
78 | int dm_split_args(int *argc, char ***argvp, char *input); |
79 | ||
80 | /* | |
81 | * The device-mapper can be driven through one of two interfaces; | |
82 | * ioctl or filesystem, depending which patch you have applied. | |
83 | */ | |
84 | int dm_interface_init(void); | |
85 | void dm_interface_exit(void); | |
86 | ||
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 | ||
96 | void *dm_vcalloc(unsigned long nmemb, unsigned long elem_size); | |
97 | union map_info *dm_get_mapinfo(struct bio *bio); | |
5c6bd75d AK |
98 | int dm_open_count(struct mapped_device *md); |
99 | int dm_lock_for_deletion(struct mapped_device *md); | |
1da177e4 | 100 | |
69267a30 AK |
101 | void dm_kobject_uevent(struct mapped_device *md); |
102 | ||
416cd17b HM |
103 | /* |
104 | * Dirty log | |
105 | */ | |
106 | int dm_dirty_log_init(void); | |
107 | void dm_dirty_log_exit(void); | |
108 | ||
945fa4d2 MP |
109 | int dm_kcopyd_init(void); |
110 | void dm_kcopyd_exit(void); | |
111 | ||
1da177e4 | 112 | #endif |