diff options
Diffstat (limited to 'libdde-linux26/libdde_linux26/contrib/include/linux/device-mapper.h')
| -rw-r--r-- | libdde-linux26/libdde_linux26/contrib/include/linux/device-mapper.h | 393 |
1 files changed, 0 insertions, 393 deletions
diff --git a/libdde-linux26/libdde_linux26/contrib/include/linux/device-mapper.h b/libdde-linux26/libdde_linux26/contrib/include/linux/device-mapper.h deleted file mode 100644 index 8209e089..00000000 --- a/libdde-linux26/libdde_linux26/contrib/include/linux/device-mapper.h +++ /dev/null @@ -1,393 +0,0 @@ -/* - * Copyright (C) 2001 Sistina Software (UK) Limited. - * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. - * - * This file is released under the LGPL. - */ - -#ifndef _LINUX_DEVICE_MAPPER_H -#define _LINUX_DEVICE_MAPPER_H - -#include <linux/bio.h> -#include <linux/blkdev.h> - -struct dm_target; -struct dm_table; -struct mapped_device; -struct bio_vec; - -typedef enum { STATUSTYPE_INFO, STATUSTYPE_TABLE } status_type_t; - -union map_info { - void *ptr; - unsigned long long ll; -}; - -/* - * In the constructor the target parameter will already have the - * table, type, begin and len fields filled in. - */ -typedef int (*dm_ctr_fn) (struct dm_target *target, - unsigned int argc, char **argv); - -/* - * The destructor doesn't need to free the dm_target, just - * anything hidden ti->private. - */ -typedef void (*dm_dtr_fn) (struct dm_target *ti); - -/* - * The map function must return: - * < 0: error - * = 0: The target will handle the io by resubmitting it later - * = 1: simple remap complete - * = 2: The target wants to push back the io - */ -typedef int (*dm_map_fn) (struct dm_target *ti, struct bio *bio, - union map_info *map_context); -typedef int (*dm_map_request_fn) (struct dm_target *ti, struct request *clone, - union map_info *map_context); - -/* - * Returns: - * < 0 : error (currently ignored) - * 0 : ended successfully - * 1 : for some reason the io has still not completed (eg, - * multipath target might want to requeue a failed io). - * 2 : The target wants to push back the io - */ -typedef int (*dm_endio_fn) (struct dm_target *ti, - struct bio *bio, int error, - union map_info *map_context); -typedef int (*dm_request_endio_fn) (struct dm_target *ti, - struct request *clone, int error, - union map_info *map_context); - -typedef void (*dm_flush_fn) (struct dm_target *ti); -typedef void (*dm_presuspend_fn) (struct dm_target *ti); -typedef void (*dm_postsuspend_fn) (struct dm_target *ti); -typedef int (*dm_preresume_fn) (struct dm_target *ti); -typedef void (*dm_resume_fn) (struct dm_target *ti); - -typedef int (*dm_status_fn) (struct dm_target *ti, status_type_t status_type, - char *result, unsigned int maxlen); - -typedef int (*dm_message_fn) (struct dm_target *ti, unsigned argc, char **argv); - -typedef int (*dm_ioctl_fn) (struct dm_target *ti, unsigned int cmd, - unsigned long arg); - -typedef int (*dm_merge_fn) (struct dm_target *ti, struct bvec_merge_data *bvm, - struct bio_vec *biovec, int max_size); - -/* - * Returns: - * 0: The target can handle the next I/O immediately. - * 1: The target can't handle the next I/O immediately. - */ -typedef int (*dm_busy_fn) (struct dm_target *ti); - -void dm_error(const char *message); - -/* - * Combine device limits. - */ -void dm_set_device_limits(struct dm_target *ti, struct block_device *bdev); - -struct dm_dev { - struct block_device *bdev; - fmode_t mode; - char name[16]; -}; - -/* - * Constructors should call these functions to ensure destination devices - * are opened/closed correctly. - * FIXME: too many arguments. - */ -int dm_get_device(struct dm_target *ti, const char *path, sector_t start, - sector_t len, fmode_t mode, struct dm_dev **result); -void dm_put_device(struct dm_target *ti, struct dm_dev *d); - -/* - * Information about a target type - */ - -/* - * Target features - */ -#define DM_TARGET_SUPPORTS_BARRIERS 0x00000001 - -struct target_type { - uint64_t features; - const char *name; - struct module *module; - unsigned version[3]; - dm_ctr_fn ctr; - dm_dtr_fn dtr; - dm_map_fn map; - dm_map_request_fn map_rq; - dm_endio_fn end_io; - dm_request_endio_fn rq_end_io; - dm_flush_fn flush; - dm_presuspend_fn presuspend; - dm_postsuspend_fn postsuspend; - dm_preresume_fn preresume; - dm_resume_fn resume; - dm_status_fn status; - dm_message_fn message; - dm_ioctl_fn ioctl; - dm_merge_fn merge; - dm_busy_fn busy; -}; - -struct io_restrictions { - unsigned long bounce_pfn; - unsigned long seg_boundary_mask; - unsigned max_hw_sectors; - unsigned max_sectors; - unsigned max_segment_size; - unsigned short hardsect_size; - unsigned short max_hw_segments; - unsigned short max_phys_segments; - unsigned char no_cluster; /* inverted so that 0 is default */ -}; - -struct dm_target { - struct dm_table *table; - struct target_type *type; - - /* target limits */ - sector_t begin; - sector_t len; - - /* FIXME: turn this into a mask, and merge with io_restrictions */ - /* Always a power of 2 */ - sector_t split_io; - - /* - * These are automatically filled in by - * dm_table_get_device. - */ - struct io_restrictions limits; - - /* target specific data */ - void *private; - - /* Used to provide an error string from the ctr */ - char *error; -}; - -int dm_register_target(struct target_type *t); -void dm_unregister_target(struct target_type *t); - -/*----------------------------------------------------------------- - * Functions for creating and manipulating mapped devices. - * Drop the reference with dm_put when you finish with the object. - *---------------------------------------------------------------*/ - -/* - * DM_ANY_MINOR chooses the next available minor number. - */ -#define DM_ANY_MINOR (-1) -int dm_create(int minor, struct mapped_device **md); - -/* - * Reference counting for md. - */ -struct mapped_device *dm_get_md(dev_t dev); -void dm_get(struct mapped_device *md); -void dm_put(struct mapped_device *md); - -/* - * An arbitrary pointer may be stored alongside a mapped device. - */ -void dm_set_mdptr(struct mapped_device *md, void *ptr); -void *dm_get_mdptr(struct mapped_device *md); - -/* - * A device can still be used while suspended, but I/O is deferred. - */ -int dm_suspend(struct mapped_device *md, unsigned suspend_flags); -int dm_resume(struct mapped_device *md); - -/* - * Event functions. - */ -uint32_t dm_get_event_nr(struct mapped_device *md); -int dm_wait_event(struct mapped_device *md, int event_nr); -uint32_t dm_next_uevent_seq(struct mapped_device *md); -void dm_uevent_add(struct mapped_device *md, struct list_head *elist); - -/* - * Info functions. - */ -const char *dm_device_name(struct mapped_device *md); -int dm_copy_name_and_uuid(struct mapped_device *md, char *name, char *uuid); -struct gendisk *dm_disk(struct mapped_device *md); -int dm_suspended(struct mapped_device *md); -int dm_noflush_suspending(struct dm_target *ti); -union map_info *dm_get_mapinfo(struct bio *bio); - -/* - * Geometry functions. - */ -int dm_get_geometry(struct mapped_device *md, struct hd_geometry *geo); -int dm_set_geometry(struct mapped_device *md, struct hd_geometry *geo); - - -/*----------------------------------------------------------------- - * Functions for manipulating device-mapper tables. - *---------------------------------------------------------------*/ - -/* - * First create an empty table. - */ -int dm_table_create(struct dm_table **result, fmode_t mode, - unsigned num_targets, struct mapped_device *md); - -/* - * Then call this once for each target. - */ -int dm_table_add_target(struct dm_table *t, const char *type, - sector_t start, sector_t len, char *params); - -/* - * Finally call this to make the table ready for use. - */ -int dm_table_complete(struct dm_table *t); - -/* - * Unplug all devices in a table. - */ -void dm_table_unplug_all(struct dm_table *t); - -/* - * Table reference counting. - */ -struct dm_table *dm_get_table(struct mapped_device *md); -void dm_table_get(struct dm_table *t); -void dm_table_put(struct dm_table *t); - -/* - * Queries - */ -sector_t dm_table_get_size(struct dm_table *t); -unsigned int dm_table_get_num_targets(struct dm_table *t); -fmode_t dm_table_get_mode(struct dm_table *t); -struct mapped_device *dm_table_get_md(struct dm_table *t); - -/* - * Trigger an event. - */ -void dm_table_event(struct dm_table *t); - -/* - * The device must be suspended before calling this method. - */ -int dm_swap_table(struct mapped_device *md, struct dm_table *t); - -/* - * A wrapper around vmalloc. - */ -void *dm_vcalloc(unsigned long nmemb, unsigned long elem_size); - -/*----------------------------------------------------------------- - * Macros. - *---------------------------------------------------------------*/ -#define DM_NAME "device-mapper" - -#define DMCRIT(f, arg...) \ - printk(KERN_CRIT DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg) - -#define DMERR(f, arg...) \ - printk(KERN_ERR DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg) -#define DMERR_LIMIT(f, arg...) \ - do { \ - if (printk_ratelimit()) \ - printk(KERN_ERR DM_NAME ": " DM_MSG_PREFIX ": " \ - f "\n", ## arg); \ - } while (0) - -#define DMWARN(f, arg...) \ - printk(KERN_WARNING DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg) -#define DMWARN_LIMIT(f, arg...) \ - do { \ - if (printk_ratelimit()) \ - printk(KERN_WARNING DM_NAME ": " DM_MSG_PREFIX ": " \ - f "\n", ## arg); \ - } while (0) - -#define DMINFO(f, arg...) \ - printk(KERN_INFO DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg) -#define DMINFO_LIMIT(f, arg...) \ - do { \ - if (printk_ratelimit()) \ - printk(KERN_INFO DM_NAME ": " DM_MSG_PREFIX ": " f \ - "\n", ## arg); \ - } while (0) - -#ifdef CONFIG_DM_DEBUG -# define DMDEBUG(f, arg...) \ - printk(KERN_DEBUG DM_NAME ": " DM_MSG_PREFIX " DEBUG: " f "\n", ## arg) -# define DMDEBUG_LIMIT(f, arg...) \ - do { \ - if (printk_ratelimit()) \ - printk(KERN_DEBUG DM_NAME ": " DM_MSG_PREFIX ": " f \ - "\n", ## arg); \ - } while (0) -#else -# define DMDEBUG(f, arg...) do {} while (0) -# define DMDEBUG_LIMIT(f, arg...) do {} while (0) -#endif - -#define DMEMIT(x...) sz += ((sz >= maxlen) ? \ - 0 : scnprintf(result + sz, maxlen - sz, x)) - -#define SECTOR_SHIFT 9 - -/* - * Definitions of return values from target end_io function. - */ -#define DM_ENDIO_INCOMPLETE 1 -#define DM_ENDIO_REQUEUE 2 - -/* - * Definitions of return values from target map function. - */ -#define DM_MAPIO_SUBMITTED 0 -#define DM_MAPIO_REMAPPED 1 -#define DM_MAPIO_REQUEUE DM_ENDIO_REQUEUE - -/* - * Ceiling(n / sz) - */ -#define dm_div_up(n, sz) (((n) + (sz) - 1) / (sz)) - -#define dm_sector_div_up(n, sz) ( \ -{ \ - sector_t _r = ((n) + (sz) - 1); \ - sector_div(_r, (sz)); \ - _r; \ -} \ -) - -/* - * ceiling(n / size) * size - */ -#define dm_round_up(n, sz) (dm_div_up((n), (sz)) * (sz)) - -#define dm_array_too_big(fixed, obj, num) \ - ((num) > (UINT_MAX - (fixed)) / (obj)) - -static inline sector_t to_sector(unsigned long n) -{ - return (n >> SECTOR_SHIFT); -} - -static inline unsigned long to_bytes(sector_t n) -{ - return (n << SECTOR_SHIFT); -} - -#endif /* _LINUX_DEVICE_MAPPER_H */ |