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block: Replace BIO_NO_PAGE_REF with BIO_PAGE_REFFED with inverted logic

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Replace BIO_NO_PAGE_REF with a BIO_PAGE_REFFED flag that has the inverted
meaning is only set when a page reference has been acquired that needs to
be released by bio_release_pages().

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
cc: Al Viro <viro@zeniv.linux.org.uk>
cc: Jens Axboe <axboe@kernel.dk>
cc: Jan Kara <jack@suse.cz>
cc: Matthew Wilcox <willy@infradead.org>
cc: Logan Gunthorpe <logang@deltatee.com>
cc: linux-block@vger.kernel.org
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230522205744.2825689-4-dhowells@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2023-05-22 21:57:41 +01:00 committed by Jens Axboe
parent 09e8c25341
commit e51bab4e20
6 changed files with 6 additions and 4 deletions
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2
block/bio.c
View File

@ -1191,7 +1191,6 @@ void bio_iov_bvec_set(struct bio *bio, struct iov_iter *iter)
bio->bi_io_vec = (struct bio_vec *)iter->bvec;
bio->bi_iter.bi_bvec_done = iter->iov_offset;
bio->bi_iter.bi_size = size;
bio_set_flag(bio, BIO_NO_PAGE_REF);
bio_set_flag(bio, BIO_CLONED);
}
@ -1336,6 +1335,7 @@ int bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter)
return 0;
}
bio_set_flag(bio, BIO_PAGE_REFFED);
do {
ret = __bio_iov_iter_get_pages(bio, iter);
} while (!ret && iov_iter_count(iter) && !bio_full(bio, 0));

1
block/blk-map.c
View File

@ -282,6 +282,7 @@ static int bio_map_user_iov(struct request *rq, struct iov_iter *iter,
if (blk_queue_pci_p2pdma(rq->q))
extraction_flags |= ITER_ALLOW_P2PDMA;
bio_set_flag(bio, BIO_PAGE_REFFED);
while (iov_iter_count(iter)) {
struct page **pages, *stack_pages[UIO_FASTIOV];
ssize_t bytes;

2
fs/direct-io.c
View File

@ -402,6 +402,8 @@ dio_bio_alloc(struct dio *dio, struct dio_submit *sdio,
bio->bi_end_io = dio_bio_end_aio;
else
bio->bi_end_io = dio_bio_end_io;
/* for now require references for all pages */
bio_set_flag(bio, BIO_PAGE_REFFED);
sdio->bio = bio;
sdio->logical_offset_in_bio = sdio->cur_page_fs_offset;
}

1
fs/iomap/direct-io.c
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@ -203,7 +203,6 @@ static void iomap_dio_zero(const struct iomap_iter *iter, struct iomap_dio *dio,
bio->bi_private = dio;
bio->bi_end_io = iomap_dio_bio_end_io;
bio_set_flag(bio, BIO_NO_PAGE_REF);
__bio_add_page(bio, page, len, 0);
iomap_dio_submit_bio(iter, dio, bio, pos);
}

2
include/linux/bio.h
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@ -488,7 +488,7 @@ void zero_fill_bio(struct bio *bio);
static inline void bio_release_pages(struct bio *bio, bool mark_dirty)
{
if (!bio_flagged(bio, BIO_NO_PAGE_REF))
if (bio_flagged(bio, BIO_PAGE_REFFED))
__bio_release_pages(bio, mark_dirty);
}

2
include/linux/blk_types.h
View File

@ -323,7 +323,7 @@ struct bio {
* bio flags
*/
enum {
BIO_NO_PAGE_REF, /* don't put release vec pages */
BIO_PAGE_REFFED, /* put pages in bio_release_pages() */
BIO_CLONED, /* doesn't own data */
BIO_BOUNCED, /* bio is a bounce bio */
BIO_QUIET, /* Make BIO Quiet */