[JFFS2] Correct parameter names of jffs2_compress() in comments
[linux-2.6/mini2440.git] / include / linux / dm-kcopyd.h
blob5db21631169567af72279f3d2fc65bec48c511ea
1 /*
2 * Copyright (C) 2001 - 2003 Sistina Software
3 * Copyright (C) 2004 - 2008 Red Hat, Inc. All rights reserved.
5 * kcopyd provides a simple interface for copying an area of one
6 * block-device to one or more other block-devices, either synchronous
7 * or with an asynchronous completion notification.
9 * This file is released under the GPL.
12 #ifndef _LINUX_DM_KCOPYD_H
13 #define _LINUX_DM_KCOPYD_H
15 #ifdef __KERNEL__
17 #include <linux/dm-io.h>
19 /* FIXME: make this configurable */
20 #define DM_KCOPYD_MAX_REGIONS 8
22 #define DM_KCOPYD_IGNORE_ERROR 1
25 * To use kcopyd you must first create a dm_kcopyd_client object.
27 struct dm_kcopyd_client;
28 int dm_kcopyd_client_create(unsigned num_pages,
29 struct dm_kcopyd_client **result);
30 void dm_kcopyd_client_destroy(struct dm_kcopyd_client *kc);
33 * Submit a copy job to kcopyd. This is built on top of the
34 * previous three fns.
36 * read_err is a boolean,
37 * write_err is a bitset, with 1 bit for each destination region
39 typedef void (*dm_kcopyd_notify_fn)(int read_err, unsigned long write_err,
40 void *context);
42 int dm_kcopyd_copy(struct dm_kcopyd_client *kc, struct dm_io_region *from,
43 unsigned num_dests, struct dm_io_region *dests,
44 unsigned flags, dm_kcopyd_notify_fn fn, void *context);
46 #endif /* __KERNEL__ */
47 #endif /* _LINUX_DM_KCOPYD_H */