package devmapper // import "github.com/docker/docker/daemon/graphdriver/devmapper" // Definition of struct dm_task and sub structures (from lvm2) // // 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 recognized 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 */ // /* // * event_nr holds either the event number (input and output) or the // * udev cookie value (input only). // * The DM_DEV_WAIT ioctl takes an event number as input. // * The DM_SUSPEND, DM_DEV_REMOVE and DM_DEV_RENAME ioctls // * use the field as a cookie to return in the DM_COOKIE // * variable with the uevents they issue. // * For output, the ioctls return the event number, not the cookie. // */ // 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 */ // char data[7]; /* padding or data */ // }; // struct target { // uint64_t start; // uint64_t length; // char *type; // char *params; // struct target *next; // }; // typedef enum { // DM_ADD_NODE_ON_RESUME, /* add /dev/mapper node with dmsetup resume */ // DM_ADD_NODE_ON_CREATE /* add /dev/mapper node with dmsetup create */ // } dm_add_node_t; // struct dm_task { // int type; // char *dev_name; // char *mangled_dev_name; // struct target *head, *tail; // int read_only; // uint32_t event_nr; // int major; // int minor; // int allow_default_major_fallback; // uid_t uid; // gid_t gid; // mode_t mode; // uint32_t read_ahead; // uint32_t read_ahead_flags; // union { // struct dm_ioctl *v4; // } dmi; // char *newname; // char *message; // char *geometry; // uint64_t sector; // int no_flush; // int no_open_count; // int skip_lockfs; // int query_inactive_table; // int suppress_identical_reload; // dm_add_node_t add_node; // uint64_t existing_table_size; // int cookie_set; // int new_uuid; // int secure_data; // int retry_remove; // int enable_checks; // int expected_errno; // char *uuid; // char *mangled_uuid; // }; //