Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Internal header file for device mapper |
| 3 | * |
| 4 | * Copyright (C) 2001, 2002 Sistina Software |
Alasdair G Kergon | 2b06cff | 2006-06-26 00:27:32 -0700 | [diff] [blame] | 5 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Darrick J. Wong | 3ac51e7 | 2006-03-27 01:17:54 -0800 | [diff] [blame] | 17 | #include <linux/hdreg.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | |
Kiyoshi Ueda | 45cbcd7 | 2006-12-08 02:41:05 -0800 | [diff] [blame] | 19 | /* |
Kiyoshi Ueda | a3d77d3 | 2006-12-08 02:41:04 -0800 | [diff] [blame] | 20 | * Suspend feature flags |
| 21 | */ |
| 22 | #define DM_SUSPEND_LOCKFS_FLAG (1 << 0) |
Kiyoshi Ueda | 81fdb09 | 2006-12-08 02:41:07 -0800 | [diff] [blame] | 23 | #define DM_SUSPEND_NOFLUSH_FLAG (1 << 1) |
Kiyoshi Ueda | a3d77d3 | 2006-12-08 02:41:04 -0800 | [diff] [blame] | 24 | |
| 25 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | * List of devices that a metadevice uses and should open/close. |
| 27 | */ |
Mikulas Patocka | 82b1519 | 2008-10-10 13:37:09 +0100 | [diff] [blame] | 28 | struct dm_dev_internal { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | struct list_head list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | atomic_t count; |
Mikulas Patocka | 82b1519 | 2008-10-10 13:37:09 +0100 | [diff] [blame] | 31 | struct dm_dev dm_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | }; |
| 33 | |
| 34 | struct dm_table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
| 36 | /*----------------------------------------------------------------- |
Alasdair G Kergon | 17b2f66 | 2006-06-26 00:27:33 -0700 | [diff] [blame] | 37 | * Internal table functions. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | *---------------------------------------------------------------*/ |
Mikulas Patocka | d581687 | 2009-01-06 03:05:10 +0000 | [diff] [blame] | 39 | void dm_table_destroy(struct dm_table *t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | void dm_table_event_callback(struct dm_table *t, |
| 41 | void (*fn)(void *), void *context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
| 44 | void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | struct list_head *dm_table_get_devices(struct dm_table *t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | void dm_table_presuspend_targets(struct dm_table *t); |
| 47 | void dm_table_postsuspend_targets(struct dm_table *t); |
Milan Broz | 8757b77 | 2006-10-03 01:15:36 -0700 | [diff] [blame] | 48 | int dm_table_resume_targets(struct dm_table *t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | int dm_table_any_congested(struct dm_table *t, int bdi_bits); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
Jun'ichi Nomura | 512875b | 2007-12-13 14:15:25 +0000 | [diff] [blame] | 51 | /* |
| 52 | * To check the return value from dm_table_find_target(). |
| 53 | */ |
| 54 | #define dm_target_is_valid(t) ((t)->table) |
Andi Kleen | ab4c14248 | 2009-01-06 03:05:09 +0000 | [diff] [blame] | 55 | int dm_table_barrier_ok(struct dm_table *t); |
Jun'ichi Nomura | 512875b | 2007-12-13 14:15:25 +0000 | [diff] [blame] | 56 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | /*----------------------------------------------------------------- |
| 58 | * A registry of target types. |
| 59 | *---------------------------------------------------------------*/ |
| 60 | int dm_target_init(void); |
| 61 | void dm_target_exit(void); |
| 62 | struct target_type *dm_get_target_type(const char *name); |
Cheng Renquan | 45194e4 | 2009-04-02 19:55:28 +0100 | [diff] [blame^] | 63 | void dm_put_target_type(struct target_type *tt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | int dm_target_iterate(void (*iter_func)(struct target_type *tt, |
| 65 | void *param), void *param); |
| 66 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | int dm_split_args(int *argc, char ***argvp, char *input); |
| 68 | |
| 69 | /* |
| 70 | * The device-mapper can be driven through one of two interfaces; |
| 71 | * ioctl or filesystem, depending which patch you have applied. |
| 72 | */ |
| 73 | int dm_interface_init(void); |
| 74 | void dm_interface_exit(void); |
| 75 | |
| 76 | /* |
Milan Broz | 784aae7 | 2009-01-06 03:05:12 +0000 | [diff] [blame] | 77 | * sysfs interface |
| 78 | */ |
| 79 | int dm_sysfs_init(struct mapped_device *md); |
| 80 | void dm_sysfs_exit(struct mapped_device *md); |
| 81 | struct kobject *dm_kobject(struct mapped_device *md); |
| 82 | struct mapped_device *dm_get_from_kobject(struct kobject *kobj); |
| 83 | |
| 84 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | * Targets for linear and striped mappings |
| 86 | */ |
| 87 | int dm_linear_init(void); |
| 88 | void dm_linear_exit(void); |
| 89 | |
| 90 | int dm_stripe_init(void); |
| 91 | void dm_stripe_exit(void); |
| 92 | |
Alasdair G Kergon | 5c6bd75 | 2006-06-26 00:27:34 -0700 | [diff] [blame] | 93 | int dm_open_count(struct mapped_device *md); |
| 94 | int dm_lock_for_deletion(struct mapped_device *md); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | |
Alasdair G Kergon | 69267a3 | 2007-12-13 14:15:57 +0000 | [diff] [blame] | 96 | void dm_kobject_uevent(struct mapped_device *md); |
| 97 | |
Mikulas Patocka | 945fa4d | 2008-04-24 21:43:49 +0100 | [diff] [blame] | 98 | int dm_kcopyd_init(void); |
| 99 | void dm_kcopyd_exit(void); |
| 100 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | #endif |