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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | /* |
| 2 | * Copyright (C) 2001 Sistina Software (UK) Limited. |
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| 3 | * |
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| 4 | * This file is released under the LGPL. |
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| 5 | */ |
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| 6 | |||
| 7 | #ifndef _LINUX_DM_IOCTL_V1_H |
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| 8 | #define _LINUX_DM_IOCTL_V1_H |
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| 9 | |||
| 10 | #include <linux/types.h> |
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| 11 | |||
| 12 | #define DM_DIR "mapper" /* Slashes not supported */ |
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| 13 | #define DM_MAX_TYPE_NAME 16 |
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| 14 | #define DM_NAME_LEN 128 |
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| 15 | #define DM_UUID_LEN 129 |
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| 16 | |||
| 17 | /* |
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| 18 | * Implements a traditional ioctl interface to the device mapper. |
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| 19 | */ |
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| 20 | |||
| 21 | /* |
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| 22 | * All ioctl arguments consist of a single chunk of memory, with |
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| 23 | * this structure at the start. If a uuid is specified any |
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| 24 | * lookup (eg. for a DM_INFO) will be done on that, *not* the |
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| 25 | * name. |
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| 26 | */ |
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| 27 | struct dm_ioctl { |
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| 28 | /* |
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| 29 | * The version number is made up of three parts: |
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| 30 | * major - no backward or forward compatibility, |
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| 31 | * minor - only backwards compatible, |
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| 32 | * patch - both backwards and forwards compatible. |
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| 33 | * |
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| 34 | * All clients of the ioctl interface should fill in the |
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| 35 | * version number of the interface that they were |
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| 36 | * compiled with. |
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| 37 | * |
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| 38 | * All recognised ioctl commands (ie. those that don't |
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| 39 | * return -ENOTTY) fill out this field, even if the |
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| 40 | * command failed. |
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| 41 | */ |
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| 42 | uint32_t version[3]; /* in/out */ |
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| 43 | uint32_t data_size; /* total size of data passed in |
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| 44 | * including this struct */ |
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| 45 | |||
| 46 | uint32_t data_start; /* offset to start of data |
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| 47 | * relative to start of this struct */ |
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| 48 | |||
| 49 | uint32_t target_count; /* in/out */ |
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| 50 | uint32_t open_count; /* out */ |
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| 51 | uint32_t flags; /* in/out */ |
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| 52 | |||
| 53 | __kernel_old_dev_t dev; /* in/out */ |
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| 54 | |||
| 55 | char name[DM_NAME_LEN]; /* device name */ |
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| 56 | char uuid[DM_UUID_LEN]; /* unique identifier for |
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| 57 | * the block device */ |
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| 58 | }; |
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| 59 | |||
| 60 | /* |
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| 61 | * Used to specify tables. These structures appear after the |
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| 62 | * dm_ioctl. |
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| 63 | */ |
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| 64 | struct dm_target_spec { |
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| 65 | int32_t status; /* used when reading from kernel only */ |
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| 66 | uint64_t sector_start; |
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| 67 | uint32_t length; |
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| 68 | |||
| 69 | /* |
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| 70 | * Offset in bytes (from the start of this struct) to |
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| 71 | * next target_spec. |
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| 72 | */ |
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| 73 | uint32_t next; |
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| 74 | |||
| 75 | char target_type[DM_MAX_TYPE_NAME]; |
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| 76 | |||
| 77 | /* |
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| 78 | * Parameter string starts immediately after this object. |
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| 79 | * Be careful to add padding after string to ensure correct |
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| 80 | * alignment of subsequent dm_target_spec. |
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| 81 | */ |
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| 82 | }; |
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| 83 | |||
| 84 | /* |
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| 85 | * Used to retrieve the target dependencies. |
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| 86 | */ |
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| 87 | struct dm_target_deps { |
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| 88 | uint32_t count; |
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| 89 | |||
| 90 | __kernel_old_dev_t dev[0]; /* out */ |
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| 91 | }; |
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| 92 | |||
| 93 | /* |
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| 94 | * If you change this make sure you make the corresponding change |
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| 95 | * to dm-ioctl.c:lookup_ioctl() |
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| 96 | */ |
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| 97 | enum { |
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| 98 | /* Top level cmds */ |
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| 99 | DM_VERSION_CMD = 0, |
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| 100 | DM_REMOVE_ALL_CMD, |
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| 101 | |||
| 102 | /* device level cmds */ |
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| 103 | DM_DEV_CREATE_CMD, |
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| 104 | DM_DEV_REMOVE_CMD, |
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| 105 | DM_DEV_RELOAD_CMD, |
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| 106 | DM_DEV_RENAME_CMD, |
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| 107 | DM_DEV_SUSPEND_CMD, |
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| 108 | DM_DEV_DEPS_CMD, |
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| 109 | DM_DEV_STATUS_CMD, |
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| 110 | |||
| 111 | /* target level cmds */ |
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| 112 | DM_TARGET_STATUS_CMD, |
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| 113 | DM_TARGET_WAIT_CMD |
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| 114 | }; |
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| 115 | |||
| 116 | #define DM_IOCTL 0xfd |
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| 117 | |||
| 118 | #define DM_VERSION _IOWR(DM_IOCTL, DM_VERSION_CMD, struct dm_ioctl) |
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| 119 | #define DM_REMOVE_ALL _IOWR(DM_IOCTL, DM_REMOVE_ALL_CMD, struct dm_ioctl) |
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| 120 | |||
| 121 | #define DM_DEV_CREATE _IOWR(DM_IOCTL, DM_DEV_CREATE_CMD, struct dm_ioctl) |
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| 122 | #define DM_DEV_REMOVE _IOWR(DM_IOCTL, DM_DEV_REMOVE_CMD, struct dm_ioctl) |
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| 123 | #define DM_DEV_RELOAD _IOWR(DM_IOCTL, DM_DEV_RELOAD_CMD, struct dm_ioctl) |
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| 124 | #define DM_DEV_SUSPEND _IOWR(DM_IOCTL, DM_DEV_SUSPEND_CMD, struct dm_ioctl) |
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| 125 | #define DM_DEV_RENAME _IOWR(DM_IOCTL, DM_DEV_RENAME_CMD, struct dm_ioctl) |
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| 126 | #define DM_DEV_DEPS _IOWR(DM_IOCTL, DM_DEV_DEPS_CMD, struct dm_ioctl) |
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| 127 | #define DM_DEV_STATUS _IOWR(DM_IOCTL, DM_DEV_STATUS_CMD, struct dm_ioctl) |
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| 128 | |||
| 129 | #define DM_TARGET_STATUS _IOWR(DM_IOCTL, DM_TARGET_STATUS_CMD, struct dm_ioctl) |
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| 130 | #define DM_TARGET_WAIT _IOWR(DM_IOCTL, DM_TARGET_WAIT_CMD, struct dm_ioctl) |
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| 131 | |||
| 132 | #define DM_VERSION_MAJOR 1 |
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| 133 | #define DM_VERSION_MINOR 0 |
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| 134 | #define DM_VERSION_PATCHLEVEL 6 |
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| 135 | #define DM_VERSION_EXTRA "-ioctl (2002-10-15)" |
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| 136 | |||
| 137 | /* Status bits */ |
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| 138 | #define DM_READONLY_FLAG 0x00000001 |
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| 139 | #define DM_SUSPEND_FLAG 0x00000002 |
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| 140 | #define DM_EXISTS_FLAG 0x00000004 |
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| 141 | #define DM_PERSISTENT_DEV_FLAG 0x00000008 |
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| 142 | |||
| 143 | /* |
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| 144 | * Flag passed into ioctl STATUS command to get table information |
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| 145 | * rather than current status. |
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| 146 | */ |
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| 147 | #define DM_STATUS_TABLE_FLAG 0x00000010 |
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| 148 | |||
| 149 | #endif /* _LINUX_DM_IOCTL_H */ |