diff options
Diffstat (limited to 'drivers/md/dm-io.h')
-rw-r--r-- | drivers/md/dm-io.h | 85 |
1 files changed, 0 insertions, 85 deletions
diff --git a/drivers/md/dm-io.h b/drivers/md/dm-io.h deleted file mode 100644 index b6bf17e..0000000 --- a/drivers/md/dm-io.h +++ /dev/null @@ -1,85 +0,0 @@ -/* - * Copyright (C) 2003 Sistina Software - * Copyright (C) 2004 - 2008 Red Hat, Inc. All rights reserved. - * - * Device-Mapper low-level I/O. - * - * This file is released under the GPL. - */ - -#ifndef _LINUX_DM_IO_H -#define _LINUX_DM_IO_H - -#ifdef __KERNEL__ - -#include <linux/types.h> - -struct dm_io_region { - struct block_device *bdev; - sector_t sector; - sector_t count; /* If this is zero the region is ignored. */ -}; - -struct page_list { - struct page_list *next; - struct page *page; -}; - -typedef void (*io_notify_fn)(unsigned long error, void *context); - -enum dm_io_mem_type { - DM_IO_PAGE_LIST,/* Page list */ - DM_IO_BVEC, /* Bio vector */ - DM_IO_VMA, /* Virtual memory area */ - DM_IO_KMEM, /* Kernel memory */ -}; - -struct dm_io_memory { - enum dm_io_mem_type type; - - union { - struct page_list *pl; - struct bio_vec *bvec; - void *vma; - void *addr; - } ptr; - - unsigned offset; -}; - -struct dm_io_notify { - io_notify_fn fn; /* Callback for asynchronous requests */ - void *context; /* Passed to callback */ -}; - -/* - * IO request structure - */ -struct dm_io_client; -struct dm_io_request { - int bi_rw; /* READ|WRITE - not READA */ - struct dm_io_memory mem; /* Memory to use for io */ - struct dm_io_notify notify; /* Synchronous if notify.fn is NULL */ - struct dm_io_client *client; /* Client memory handler */ -}; - -/* - * For async io calls, users can alternatively use the dm_io() function below - * and dm_io_client_create() to create private mempools for the client. - * - * Create/destroy may block. - */ -struct dm_io_client *dm_io_client_create(unsigned num_pages); -int dm_io_client_resize(unsigned num_pages, struct dm_io_client *client); -void dm_io_client_destroy(struct dm_io_client *client); - -/* - * IO interface using private per-client pools. - * Each bit in the optional 'sync_error_bits' bitset indicates whether an - * error occurred doing io to the corresponding region. - */ -int dm_io(struct dm_io_request *io_req, unsigned num_regions, - struct dm_io_region *region, unsigned long *sync_error_bits); - -#endif /* __KERNEL__ */ -#endif /* _LINUX_DM_IO_H */ |