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dm io: remove old interface

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Remove old dm-io interface.

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Milan Broz
2007-05-09 02:33:05 -07:00
committed by Linus Torvalds
parent 88be163abb
commit bf17ce3a60
2 changed files with 7 additions and 175 deletions
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51
drivers/md/dm-io.h
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@@ -12,7 +12,7 @@
struct io_region {
struct block_device *bdev;
sector_t sector;
sector_t count;
sector_t count; /* If this is zero the region is ignored. */
};
struct page_list {
@@ -20,10 +20,6 @@ struct page_list {
struct page *page;
};
/*
* 'error' is a bitset, with each bit indicating whether an error
* occurred doing io to the corresponding region.
*/
typedef void (*io_notify_fn)(unsigned long error, void *context);
enum dm_io_mem_type {
@@ -62,16 +58,6 @@ struct dm_io_request {
struct dm_io_client *client; /* Client memory handler */
};
/*
* Before anyone uses the IO interface they should call
* dm_io_get(), specifying roughly how many pages they are
* expecting to perform io on concurrently.
*
* This function may block.
*/
int dm_io_get(unsigned int num_pages);
void dm_io_put(unsigned int num_pages);
/*
* 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.
@@ -82,41 +68,10 @@ 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);
/*
* Synchronous IO.
*
* Please ensure that the rw flag in the next two functions is
* either READ or WRITE, ie. we don't take READA. Any
* regions with a zero count field will be ignored.
*/
int dm_io_sync(unsigned int num_regions, struct io_region *where, int rw,
struct page_list *pl, unsigned int offset,
unsigned long *error_bits);
int dm_io_sync_bvec(unsigned int num_regions, struct io_region *where, int rw,
struct bio_vec *bvec, unsigned long *error_bits);
int dm_io_sync_vm(unsigned int num_regions, struct io_region *where, int rw,
void *data, unsigned long *error_bits);
/*
* Aynchronous IO.
*
* The 'where' array may be safely allocated on the stack since
* the function takes a copy.
*/
int dm_io_async(unsigned int num_regions, struct io_region *where, int rw,
struct page_list *pl, unsigned int offset,
io_notify_fn fn, void *context);
int dm_io_async_bvec(unsigned int num_regions, struct io_region *where, int rw,
struct bio_vec *bvec, io_notify_fn fn, void *context);
int dm_io_async_vm(unsigned int num_regions, struct io_region *where, int rw,
void *data, io_notify_fn fn, void *context);
/*
* 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 io_region *region, unsigned long *sync_error_bits);