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authorMilan Broz <mbroz@redhat.com>2007-05-09 02:33:05 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-09 12:30:47 -0700
commitbf17ce3a604d943f29bf1bc1a66a4e0d2ad4ec96 (patch)
tree531058ab5ad63fb2e104bfadddbdbde080a0289b /drivers/md/dm-io.h
parent88be163abb5324bab09f5eff9646590eec5314eb (diff)
downloadop-kernel-dev-bf17ce3a604d943f29bf1bc1a66a4e0d2ad4ec96.zip
op-kernel-dev-bf17ce3a604d943f29bf1bc1a66a4e0d2ad4ec96.tar.gz
dm io: remove old interface
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>
Diffstat (limited to 'drivers/md/dm-io.h')
-rw-r--r--drivers/md/dm-io.h51
1 files changed, 3 insertions, 48 deletions
diff --git a/drivers/md/dm-io.h b/drivers/md/dm-io.h
index 05b1338..f647e2c 100644
--- a/drivers/md/dm-io.h
+++ b/drivers/md/dm-io.h
@@ -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 {
@@ -63,16 +59,6 @@ struct dm_io_request {
};
/*
- * 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.
*
@@ -83,40 +69,9 @@ 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);
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