http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/linux/dm-ioctl.h

/* * Copyright (C) 2001 - 2003 Sistina Software (UK) Limited. * Copyright (C) 2004 - 2005 Red Hat, Inc. All rights reserved. * * This file is released under the LGPL. */ #ifndef _LINUX_DM_IOCTL_V4_H #define _LINUX_DM_IOCTL_V4_H #include <linux/types.h> #define DM_DIR "mapper" /* Slashes not supported */ #define DM_MAX_TYPE_NAME 16 #define DM_NAME_LEN 128 #define DM_UUID_LEN 129 /* * A traditional ioctl interface for the device mapper. * * Each device can have two tables associated with it, an * 'active' table which is the one currently used by io passing * through the device, and an 'inactive' one which is a table * that is being prepared as a replacement for the 'active' one. * * DM_VERSION: * Just get the version information for the ioctl interface. * * DM_REMOVE_ALL: * Remove all dm devices, destroy all tables. Only really used * for debug. * * DM_LIST_DEVICES: * Get a list of all the dm device names. * * DM_DEV_CREATE: * Create a new device, neither the 'active' or 'inactive' table * slots will be filled. The device will be in suspended state * after creation, however any io to the device will get errored * since it will be out-of-bounds. * * DM_DEV_REMOVE: * Remove a device, destroy any tables. * * DM_DEV_RENAME: * Rename a device. * * DM_SUSPEND: * This performs both suspend and resume, depending which flag is * passed in. * Suspend: This command will not return until all pending io to * the device has completed. Further io will be deferred until * the device is resumed. * Resume: It is no longer an error to issue this command on an * unsuspended device. If a table is present in the 'inactive' * slot, it will be moved to the active slot, then the old table * from the active slot will be _destroyed_. Finally the device * is resumed. * * DM_DEV_STATUS: * Retrieves the status for the table in the 'active' slot. * * DM_DEV_WAIT: * Wait for a significant event to occur to the device. This * could either be caused by an event triggered by one of the * targets of the table in the 'active' slot, or a table change. * * DM_TABLE_LOAD: * Load a table into the 'inactive' slot for the device. The * device does _not_ need to be suspended prior to this command. * * DM_TABLE_CLEAR: * Destroy any table in the 'inactive' slot (ie. abort). * * DM_TABLE_DEPS: * Return a set of device dependencies for the 'active' table. * * DM_TABLE_STATUS: * Return the targets status for the 'active' table. * * DM_TARGET_MSG: * Pass a message string to the target at a specific offset of a device. */ /* * All ioctl arguments consist of a single chunk of memory, with * this structure at the start. If a uuid is specified any * lookup (eg. for a DM_INFO) will be done on that, *not* the * name. */ struct dm_ioctl { /* * The version number is made up of three parts: * major - no backward or forward compatibility, * minor - only backwards compatible, * patch - both backwards and forwards compatible. * * All clients of the ioctl interface should fill in the * version number of the interface that they were * compiled with. * * All recognised ioctl commands (ie. those that don't * return -ENOTTY) fill out this field, even if the * command failed. */ uint32_t version[3]; /* in/out */ uint32_t data_size; /* total size of data passed in * including this struct */ uint32_t data_start; /* offset to start of data * relative to start of this struct */ uint32_t target_count; /* in/out */ int32_t open_count; /* out */ uint32_t flags; /* in/out */ uint32_t event_nr; /* in/out */ uint32_t padding; uint64_t dev; /* in/out */ char name[DM_NAME_LEN]; /* device name */ char uuid[DM_UUID_LEN]; /* unique identifier for * the block device */ }; /* * Used to specify tables. These structures appear after the * dm_ioctl. */ struct dm_target_spec { uint64_t sector_start; uint64_t length; int32_t status; /* used when reading from kernel only */ /* * Location of the next dm_target_spec. * - When specifying targets on a DM_TABLE_LOAD command, this value is * the number of bytes from the start of the "current" dm_target_spec * to the start of the "next" dm_target_spec. * - When retrieving targets on a DM_TABLE_STATUS command, this value * is the number of bytes from the start of the first dm_target_spec * (that follows the dm_ioctl struct) to the start of the "next" * dm_target_spec. */ uint32_t next; char target_type[DM_MAX_TYPE_NAME]; /* * Parameter string starts immediately after this object. * Be careful to add padding after string to ensure correct * alignment of subsequent dm_target_spec. */ }; /* * Used to retrieve the target dependencies. */ struct dm_target_deps { uint32_t count; /* Array size */ uint32_t padding; /* unused */ uint64_t dev[0]; /* out */ }; /* * Used to get a list of all dm devices. */ struct dm_name_list { uint64_t dev; uint32_t next; /* offset to the next record from the _start_ of this */ char name[0]; }; /* * Used to retrieve the target versions */ struct dm_target_versions { uint32_t next; uint32_t version[3]; char name[0]; }; /* * Used to pass message to a target */ struct dm_target_msg { uint64_t sector; /* Device sector */ char message[0]; }; /* * If you change this make sure you make the corresponding change * to dm-ioctl.c:lookup_ioctl() */ enum { /* Top level cmds */ DM_VERSION_CMD = 0, DM_REMOVE_ALL_CMD, DM_LIST_DEVICES_CMD, /* device level cmds */ DM_DEV_CREATE_CMD, DM_DEV_REMOVE_CMD, DM_DEV_RENAME_CMD, DM_DEV_SUSPEND_CMD, DM_DEV_STATUS_CMD, DM_DEV_WAIT_CMD, /* Table level cmds */ DM_TABLE_LOAD_CMD, DM_TABLE_CLEAR_CMD, DM_TABLE_DEPS_CMD, DM_TABLE_STATUS_CMD, /* Added later */ DM_LIST_VERSIONS_CMD, DM_TARGET_MSG_CMD, }; /* * The dm_ioctl struct passed into the ioctl is just the header * on a larger chunk of memory. On x86-64 and other * architectures the dm-ioctl struct will be padded to an 8 byte * boundary so the size will be different, which would change the * ioctl code - yes I really messed up. This hack forces these * architectures to have the correct ioctl code. */ #ifdef CONFIG_COMPAT typedef char ioctl_struct[308]; #define DM_VERSION_32 _IOWR(DM_IOCTL, DM_VERSION_CMD, ioctl_struct) #define DM_REMOVE_ALL_32 _IOWR(DM_IOCTL, DM_REMOVE_ALL_CMD, ioctl_struct) #define DM_LIST_DEVICES_32 _IOWR(DM_IOCTL, DM_LIST_DEVICES_CMD, ioctl_struct) #define DM_DEV_CREATE_32 _IOWR(DM_IOCTL, DM_DEV_CREATE_CMD, ioctl_struct) #define DM_DEV_REMOVE_32 _IOWR(DM_IOCTL, DM_DEV_REMOVE_CMD, ioctl_struct) #define DM_DEV_RENAME_32 _IOWR(DM_IOCTL, DM_DEV_RENAME_CMD, ioctl_struct) #define DM_DEV_SUSPEND_32 _IOWR(DM_IOCTL, DM_DEV_SUSPEND_CMD, ioctl_struct) #define DM_DEV_STATUS_32 _IOWR(DM_IOCTL, DM_DEV_STATUS_CMD, ioctl_struct) #define DM_DEV_WAIT_32 _IOWR(DM_IOCTL, DM_DEV_WAIT_CMD, ioctl_struct) #define DM_TABLE_LOAD_32 _IOWR(DM_IOCTL, DM_TABLE_LOAD_CMD, ioctl_struct) #define DM_TABLE_CLEAR_32 _IOWR(DM_IOCTL, DM_TABLE_CLEAR_CMD, ioctl_struct) #define DM_TABLE_DEPS_32 _IOWR(DM_IOCTL, DM_TABLE_DEPS_CMD, ioctl_struct) #define DM_TABLE_STATUS_32 _IOWR(DM_IOCTL, DM_TABLE_STATUS_CMD, ioctl_struct) #define DM_LIST_VERSIONS_32 _IOWR(DM_IOCTL, DM_LIST_VERSIONS_CMD, ioctl_struct) #define DM_TARGET_MSG_32 _IOWR(DM_IOCTL, DM_TARGET_MSG_CMD, ioctl_struct) #endif #define DM_IOCTL 0xfd #define DM_VERSION _IOWR(DM_IOCTL, DM_VERSION_CMD, struct dm_ioctl) #define DM_REMOVE_ALL _IOWR(DM_IOCTL, DM_REMOVE_ALL_CMD, struct dm_ioctl) #define DM_LIST_DEVICES _IOWR(DM_IOCTL, DM_LIST_DEVICES_CMD, struct dm_ioctl) #define DM_DEV_CREATE _IOWR(DM_IOCTL, DM_DEV_CREATE_CMD, struct dm_ioctl) #define DM_DEV_REMOVE _IOWR(DM_IOCTL, DM_DEV_REMOVE_CMD, struct dm_ioctl) #define DM_DEV_RENAME _IOWR(DM_IOCTL, DM_DEV_RENAME_CMD, struct dm_ioctl) #define DM_DEV_SUSPEND _IOWR(DM_IOCTL, DM_DEV_SUSPEND_CMD, struct dm_ioctl) #define DM_DEV_STATUS _IOWR(DM_IOCTL, DM_DEV_STATUS_CMD, struct dm_ioctl) #define DM_DEV_WAIT _IOWR(DM_IOCTL, DM_DEV_WAIT_CMD, struct dm_ioctl) #define DM_TABLE_LOAD _IOWR(DM_IOCTL, DM_TABLE_LOAD_CMD, struct dm_ioctl) #define DM_TABLE_CLEAR _IOWR(DM_IOCTL, DM_TABLE_CLEAR_CMD, struct dm_ioctl) #define DM_TABLE_DEPS _IOWR(DM_IOCTL, DM_TABLE_DEPS_CMD, struct dm_ioctl) #define DM_TABLE_STATUS _IOWR(DM_IOCTL, DM_TABLE_STATUS_CMD, struct dm_ioctl) #define DM_LIST_VERSIONS _IOWR(DM_IOCTL, DM_LIST_VERSIONS_CMD, struct dm_ioctl) #define DM_TARGET_MSG _IOWR(DM_IOCTL, DM_TARGET_MSG_CMD, struct dm_ioctl) #define DM_VERSION_MAJOR 4 #define DM_VERSION_MINOR 5 #define DM_VERSION_PATCHLEVEL 0 #define DM_VERSION_EXTRA "-ioctl (2005-10-04)" /* Status bits */ #define DM_READONLY_FLAG (1 << 0) /* In/Out */ #define DM_SUSPEND_FLAG (1 << 1) /* In/Out */ #define DM_PERSISTENT_DEV_FLAG (1 << 3) /* In */ /* * Flag passed into ioctl STATUS command to get table information * rather than current status. */ #define DM_STATUS_TABLE_FLAG (1 << 4) /* In */ /* * Flags that indicate whether a table is present in either of * the two table slots that a device has. */ #define DM_ACTIVE_PRESENT_FLAG (1 << 5) /* Out */ #define DM_INACTIVE_PRESENT_FLAG (1 << 6) /* Out */ /* * Indicates that the buffer passed in wasn't big enough for the * results. */ #define DM_BUFFER_FULL_FLAG (1 << 8) /* Out */ /* * Set this to improve performance when you aren't going to use open_count. */ #define DM_SKIP_BDGET_FLAG (1 << 9) /* In */ /* * Set this to avoid attempting to freeze any filesystem when suspending. */ #define DM_SKIP_LOCKFS_FLAG (1 << 10) /* In */ #endif /* _LINUX_DM_IOCTL_H */