/* * Copyright (C) 2001 - 2003 Sistina Software * Copyright (C) 2004 - 2008 Red Hat, Inc. All rights reserved. * * kcopyd provides a simple interface for copying an area of one * block-device to one or more other block-devices, either synchronous * or with an asynchronous completion notification. * * This file is released under the GPL. */ #ifndef _LINUX_DM_KCOPYD_H #define _LINUX_DM_KCOPYD_H #ifdef __KERNEL__ #include <linux/dm-io.h> /* FIXME: make this configurable */ #define DM_KCOPYD_MAX_REGIONS 8 #define DM_KCOPYD_IGNORE_ERROR 1 /* * To use kcopyd you must first create a dm_kcopyd_client object. */ struct dm_kcopyd_client; int dm_kcopyd_client_create(unsigned num_pages, struct dm_kcopyd_client **result); void dm_kcopyd_client_destroy(struct dm_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 (*dm_kcopyd_notify_fn)(int read_err, unsigned long write_err, void *context); 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); #endif /* __KERNEL__ */ #endif /* _LINUX_DM_KCOPYD_H */ -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
