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block: Added folio-ized version of bio_add_hw_page()

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

Signed-off-by: Kundan Kumar <kundan.kumar@samsung.com>
Tested-by: Luis Chamberlain <mcgrof@kernel.org>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: https://lore.kernel.org/r/20240911064935.5630-2-kundan.kumar@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Kundan Kumar 2024-09-11 12:19:32 +05:30 committed by Jens Axboe
parent a7609d2aec
commit 7de9895468
2 changed files with 27 additions and 0 deletions
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23
block/bio.c
View File

@ -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

4
block/blk.h
View File

@ -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.