mirror of
https://github.com/torvalds/linux.git
synced 2024-11-27 06:31:52 +00:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
43 lines
1.1 KiB
C
43 lines
1.1 KiB
C
/*
|
|
* Copyright (C) 2001 Sistina Software
|
|
*
|
|
* This file is released under the GPL.
|
|
*
|
|
* Kcopyd provides a simple interface for copying an area of one
|
|
* block-device to one or more other block-devices, with an asynchronous
|
|
* completion notification.
|
|
*/
|
|
|
|
#ifndef DM_KCOPYD_H
|
|
#define DM_KCOPYD_H
|
|
|
|
#include "dm-io.h"
|
|
|
|
/* FIXME: make this configurable */
|
|
#define KCOPYD_MAX_REGIONS 8
|
|
|
|
#define KCOPYD_IGNORE_ERROR 1
|
|
|
|
/*
|
|
* To use kcopyd you must first create a kcopyd client object.
|
|
*/
|
|
struct kcopyd_client;
|
|
int kcopyd_client_create(unsigned int num_pages, struct kcopyd_client **result);
|
|
void kcopyd_client_destroy(struct kcopyd_client *kc);
|
|
|
|
/*
|
|
* Submit a copy job to kcopyd. This is built on top of the
|
|
* previous three fns.
|
|
*
|
|
* read_err is a boolean,
|
|
* write_err is a bitset, with 1 bit for each destination region
|
|
*/
|
|
typedef void (*kcopyd_notify_fn)(int read_err,
|
|
unsigned int write_err, void *context);
|
|
|
|
int kcopyd_copy(struct kcopyd_client *kc, struct io_region *from,
|
|
unsigned int num_dests, struct io_region *dests,
|
|
unsigned int flags, kcopyd_notify_fn fn, void *context);
|
|
|
|
#endif
|