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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/moduleparam.h>
17 #include <linux/blkdev.h>
18 #include <linux/backing-dev.h>
19 #include <linux/hdreg.h>
20 #include <linux/completion.h>
21 #include <linux/kobject.h>
22 #include <linux/refcount.h>
23
24 #include "dm-stats.h"
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26
27
28
29 #define DM_SUSPEND_LOCKFS_FLAG (1 << 0)
30 #define DM_SUSPEND_NOFLUSH_FLAG (1 << 1)
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35 #define DM_STATUS_NOFLUSH_FLAG (1 << 0)
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39
40 struct dm_dev_internal {
41 struct list_head list;
42 refcount_t count;
43 struct dm_dev *dm_dev;
44 };
45
46 struct dm_table;
47 struct dm_md_mempools;
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51
52 void dm_table_event_callback(struct dm_table *t,
53 void (*fn)(void *), void *context);
54 struct dm_target *dm_table_get_target(struct dm_table *t, unsigned int index);
55 struct dm_target *dm_table_find_target(struct dm_table *t, sector_t sector);
56 bool dm_table_has_no_data_devices(struct dm_table *table);
57 int dm_calculate_queue_limits(struct dm_table *table,
58 struct queue_limits *limits);
59 void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
60 struct queue_limits *limits);
61 struct list_head *dm_table_get_devices(struct dm_table *t);
62 void dm_table_presuspend_targets(struct dm_table *t);
63 void dm_table_presuspend_undo_targets(struct dm_table *t);
64 void dm_table_postsuspend_targets(struct dm_table *t);
65 int dm_table_resume_targets(struct dm_table *t);
66 int dm_table_any_congested(struct dm_table *t, int bdi_bits);
67 enum dm_queue_mode dm_table_get_type(struct dm_table *t);
68 struct target_type *dm_table_get_immutable_target_type(struct dm_table *t);
69 struct dm_target *dm_table_get_immutable_target(struct dm_table *t);
70 struct dm_target *dm_table_get_wildcard_target(struct dm_table *t);
71 bool dm_table_bio_based(struct dm_table *t);
72 bool dm_table_request_based(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);
75 bool dm_table_supports_dax(struct dm_table *t, iterate_devices_callout_fn fn,
76 int *blocksize);
77 int device_supports_dax(struct dm_target *ti, struct dm_dev *dev,
78 sector_t start, sector_t len, void *data);
79
80 void dm_lock_md_type(struct mapped_device *md);
81 void dm_unlock_md_type(struct mapped_device *md);
82 void dm_set_md_type(struct mapped_device *md, enum dm_queue_mode type);
83 enum dm_queue_mode dm_get_md_type(struct mapped_device *md);
84 struct target_type *dm_get_immutable_target_type(struct mapped_device *md);
85
86 int dm_setup_md_queue(struct mapped_device *md, struct dm_table *t);
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91 #define dm_target_bio_based(t) ((t)->type->map != NULL)
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96 #define dm_target_request_based(t) ((t)->type->clone_and_map_rq != NULL)
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102 #define dm_target_hybrid(t) (dm_target_bio_based(t) && dm_target_request_based(t))
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107 int dm_target_init(void);
108 void dm_target_exit(void);
109 struct target_type *dm_get_target_type(const char *name);
110 void dm_put_target_type(struct target_type *tt);
111 int dm_target_iterate(void (*iter_func)(struct target_type *tt,
112 void *param), void *param);
113
114 int dm_split_args(int *argc, char ***argvp, char *input);
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119 int dm_deleting_md(struct mapped_device *md);
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124 int dm_suspended_md(struct mapped_device *md);
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129 int dm_suspended_internally_md(struct mapped_device *md);
130 void dm_internal_suspend_fast(struct mapped_device *md);
131 void dm_internal_resume_fast(struct mapped_device *md);
132 void dm_internal_suspend_noflush(struct mapped_device *md);
133 void dm_internal_resume(struct mapped_device *md);
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138 int dm_test_deferred_remove_flag(struct mapped_device *md);
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143 void dm_deferred_remove(void);
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149 int dm_interface_init(void);
150 void dm_interface_exit(void);
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155 int dm_sysfs_init(struct mapped_device *md);
156 void dm_sysfs_exit(struct mapped_device *md);
157 struct kobject *dm_kobject(struct mapped_device *md);
158 struct mapped_device *dm_get_from_kobject(struct kobject *kobj);
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163 void dm_kobject_release(struct kobject *kobj);
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168 int dm_linear_init(void);
169 void dm_linear_exit(void);
170
171 int dm_stripe_init(void);
172 void dm_stripe_exit(void);
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177 void dm_destroy(struct mapped_device *md);
178 void dm_destroy_immediate(struct mapped_device *md);
179 int dm_open_count(struct mapped_device *md);
180 int dm_lock_for_deletion(struct mapped_device *md, bool mark_deferred, bool only_deferred);
181 int dm_cancel_deferred_remove(struct mapped_device *md);
182 int dm_request_based(struct mapped_device *md);
183 sector_t dm_get_size(struct mapped_device *md);
184 struct request_queue *dm_get_md_queue(struct mapped_device *md);
185 int dm_get_table_device(struct mapped_device *md, dev_t dev, fmode_t mode,
186 struct dm_dev **result);
187 void dm_put_table_device(struct mapped_device *md, struct dm_dev *d);
188 struct dm_stats *dm_get_stats(struct mapped_device *md);
189
190 int dm_kobject_uevent(struct mapped_device *md, enum kobject_action action,
191 unsigned cookie);
192
193 void dm_internal_suspend(struct mapped_device *md);
194 void dm_internal_resume(struct mapped_device *md);
195
196 int dm_io_init(void);
197 void dm_io_exit(void);
198
199 int dm_kcopyd_init(void);
200 void dm_kcopyd_exit(void);
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205 struct dm_md_mempools *dm_alloc_md_mempools(struct mapped_device *md, enum dm_queue_mode type,
206 unsigned integrity, unsigned per_bio_data_size,
207 unsigned min_pool_size);
208 void dm_free_md_mempools(struct dm_md_mempools *pools);
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213 unsigned dm_get_reserved_bio_based_ios(void);
214
215 #endif