Commit 7de98954 authored by Kundan Kumar's avatar Kundan Kumar Committed by Jens Axboe
Browse files

block: Added folio-ized version of bio_add_hw_page() 



Added new bio_add_hw_folio() function as a wrapper around
bio_add_hw_page(). This is a prep patch.

Signed-off-by: default avatarKundan Kumar <kundan.kumar@samsung.com>
Tested-by: default avatarLuis Chamberlain <mcgrof@kernel.org>
Reviewed-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Link: https://lore.kernel.org/r/20240911064935.5630-2-kundan.kumar@samsung.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent a7609d2a

block/bio.c

+23 −0
Original line number Diff line number Diff line
@@ -1016,6 +1016,29 @@ int bio_add_hw_page(struct request_queue *q, struct bio *bio, 
	return len;

}



/**

 * bio_add_hw_folio - attempt to add a folio to a bio with hw constraints

 * @q: the target queue

 * @bio: destination bio

 * @folio: folio to add

 * @len: vec entry length

 * @offset: vec entry offset in the folio

 * @max_sectors: maximum number of sectors that can be added

 * @same_page: return if the segment has been merged inside the same folio

 *

 * Add a folio to a bio while respecting the hardware max_sectors, max_segment

 * and gap limitations.

 */

int bio_add_hw_folio(struct request_queue *q, struct bio *bio,

		struct folio *folio, size_t len, size_t offset,

		unsigned int max_sectors, bool *same_page)

{

	if (len > UINT_MAX || offset > UINT_MAX)

		return 0;

	return bio_add_hw_page(q, bio, folio_page(folio, 0), len, offset,

			       max_sectors, same_page);

}



/**

 * bio_add_pc_page	- attempt to add page to passthrough bio

 * @q: the target queue

block/blk.h

+4 −0
Original line number Diff line number Diff line
@@ -574,6 +574,10 @@ int bio_add_hw_page(struct request_queue *q, struct bio *bio, 
		struct page *page, unsigned int len, unsigned int offset,

		unsigned int max_sectors, bool *same_page);



int bio_add_hw_folio(struct request_queue *q, struct bio *bio,

		struct folio *folio, size_t len, size_t offset,

		unsigned int max_sectors, bool *same_page);



/*

 * Clean up a page appropriately, where the page may be pinned, may have a

 * ref taken on it or neither.