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Merge git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm

Browse source 
* git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm: (34 commits)
  dm table: set flush capability based on underlying devices
  dm crypt: optionally support discard requests
  dm raid: add md raid1 support
  dm raid: support metadata devices
  dm raid: add write_mostly parameter
  dm raid: add region_size parameter
  dm raid: improve table parameters documentation
  dm ioctl: forbid multiple device specifiers
  dm ioctl: introduce __get_dev_cell
  dm ioctl: fill in device parameters in more ioctls
  dm flakey: add corrupt_bio_byte feature
  dm flakey: add drop_writes
  dm flakey: support feature args
  dm flakey: use dm_target_offset and support discards
  dm table: share target argument parsing functions
  dm snapshot: skip reading origin when overwriting complete chunk
  dm: ignore merge_bvec for snapshots when safe
  dm table: clean dm_get_device and move exports
  dm raid: tidy includes
  dm ioctl: prevent empty message
  ...
This commit is contained in:
Linus Torvalds 2011-08-02 20:49:21 -10:00
commit f3406816bb
21 changed files with 1561 additions and 404 deletions
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43
include/linux/device-mapper.h
View file

@ -208,6 +208,49 @@ struct dm_target_callbacks {
int dm_register_target(struct target_type *t);
void dm_unregister_target(struct target_type *t);
/*
* Target argument parsing.
*/
struct dm_arg_set {
unsigned argc;
char **argv;
};
/*
* The minimum and maximum value of a numeric argument, together with
* the error message to use if the number is found to be outside that range.
*/
struct dm_arg {
unsigned min;
unsigned max;
char *error;
};
/*
* Validate the next argument, either returning it as *value or, if invalid,
* returning -EINVAL and setting *error.
*/
int dm_read_arg(struct dm_arg *arg, struct dm_arg_set *arg_set,
unsigned *value, char **error);
/*
* Process the next argument as the start of a group containing between
* arg->min and arg->max further arguments. Either return the size as
* *num_args or, if invalid, return -EINVAL and set *error.
*/
int dm_read_arg_group(struct dm_arg *arg, struct dm_arg_set *arg_set,
unsigned *num_args, char **error);
/*
* Return the current argument and shift to the next.
*/
const char *dm_shift_arg(struct dm_arg_set *as);
/*
* Move through num_args arguments.
*/
void dm_consume_args(struct dm_arg_set *as, unsigned num_args);
/*-----------------------------------------------------------------
* Functions for creating and manipulating mapped devices.
* Drop the reference with dm_put when you finish with the object.

4
include/linux/dm-ioctl.h
View file

@ -267,9 +267,9 @@ enum {
#define DM_DEV_SET_GEOMETRY _IOWR(DM_IOCTL, DM_DEV_SET_GEOMETRY_CMD, struct dm_ioctl)
#define DM_VERSION_MAJOR 4
#define DM_VERSION_MINOR 20
#define DM_VERSION_MINOR 21
#define DM_VERSION_PATCHLEVEL 0
#define DM_VERSION_EXTRA "-ioctl (2011-02-02)"
#define DM_VERSION_EXTRA "-ioctl (2011-07-06)"
/* Status bits */
#define DM_READONLY_FLAG (1 << 0) /* In/Out */

15
include/linux/dm-kcopyd.h
View file

@ -42,5 +42,20 @@ int dm_kcopyd_copy(struct dm_kcopyd_client *kc, struct dm_io_region *from,
unsigned num_dests, struct dm_io_region *dests,
unsigned flags, dm_kcopyd_notify_fn fn, void *context);
/*
* Prepare a callback and submit it via the kcopyd thread.
*
* dm_kcopyd_prepare_callback allocates a callback structure and returns it.
* It must not be called from interrupt context.
* The returned value should be passed into dm_kcopyd_do_callback.
*
* dm_kcopyd_do_callback submits the callback.
* It may be called from interrupt context.
* The callback is issued from the kcopyd thread.
*/
void *dm_kcopyd_prepare_callback(struct dm_kcopyd_client *kc,
dm_kcopyd_notify_fn fn, void *context);
void dm_kcopyd_do_callback(void *job, int read_err, unsigned long write_err);
#endif /* __KERNEL__ */
#endif /* _LINUX_DM_KCOPYD_H */