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dm snapshot: use dm-bufio

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Use dm-bufio for initial loading of the exceptions.
Introduce a new function dm_bufio_forget that frees the given buffer.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mikulas Patocka
2014-01-13 19:12:36 -05:00
committed by Mike Snitzer
parent 2cadabd512
commit 55494bf294
4 changed files with 62 additions and 7 deletions
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7
drivers/md/dm-bufio.h
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@@ -108,6 +108,13 @@ int dm_bufio_issue_flush(struct dm_bufio_client *c);
*/
void dm_bufio_release_move(struct dm_buffer *b, sector_t new_block);
/*
* Free the given buffer.
* This is just a hint, if the buffer is in use or dirty, this function
* does nothing.
*/
void dm_bufio_forget(struct dm_bufio_client *c, sector_t block);
unsigned dm_bufio_get_block_size(struct dm_bufio_client *c);
sector_t dm_bufio_get_device_size(struct dm_bufio_client *c);
sector_t dm_bufio_get_block_number(struct dm_buffer *b);