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block-5.13-2021-05-09

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Merge tag 'block-5.13-2021-05-09' of git://git.kernel.dk/linux-block

Pull block fix from Jens Axboe:
 "Turns out the bio max size change still has issues, so let's get it
  reverted for 5.13-rc1. We'll shake out the issues there and defer it
  to 5.14 instead"

* tag 'block-5.13-2021-05-09' of git://git.kernel.dk/linux-block:
  Revert "bio: limit bio max size"
This commit is contained in:
Linus Torvalds 2021-05-09 13:25:14 -07:00
commit 506c30790f
4 changed files with 3 additions and 21 deletions
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13
block/bio.c
View File

@ -255,13 +255,6 @@ void bio_init(struct bio *bio, struct bio_vec *table,
}
EXPORT_SYMBOL(bio_init);
unsigned int bio_max_size(struct bio *bio)
{
struct block_device *bdev = bio->bi_bdev;
return bdev ? bdev->bd_disk->queue->limits.bio_max_bytes : UINT_MAX;
}
/**
* bio_reset - reinitialize a bio
* @bio: bio to reset
@ -873,7 +866,7 @@ bool __bio_try_merge_page(struct bio *bio, struct page *page,
struct bio_vec *bv = &bio->bi_io_vec[bio->bi_vcnt - 1];
if (page_is_mergeable(bv, page, len, off, same_page)) {
if (bio->bi_iter.bi_size > bio_max_size(bio) - len) {
if (bio->bi_iter.bi_size > UINT_MAX - len) {
*same_page = false;
return false;
}
@ -1002,7 +995,6 @@ static int __bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter)
{
unsigned short nr_pages = bio->bi_max_vecs - bio->bi_vcnt;
unsigned short entries_left = bio->bi_max_vecs - bio->bi_vcnt;
unsigned int bytes_left = bio_max_size(bio) - bio->bi_iter.bi_size;
struct bio_vec *bv = bio->bi_io_vec + bio->bi_vcnt;
struct page **pages = (struct page **)bv;
bool same_page = false;
@ -1018,8 +1010,7 @@ static int __bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter)
BUILD_BUG_ON(PAGE_PTRS_PER_BVEC < 2);
pages += entries_left * (PAGE_PTRS_PER_BVEC - 1);
size = iov_iter_get_pages(iter, pages, bytes_left, nr_pages,
&offset);
size = iov_iter_get_pages(iter, pages, LONG_MAX, nr_pages, &offset);
if (unlikely(size <= 0))
return size ? size : -EFAULT;

5
block/blk-settings.c
View File

@ -32,7 +32,6 @@ EXPORT_SYMBOL_GPL(blk_queue_rq_timeout);
*/
void blk_set_default_limits(struct queue_limits *lim)
{
lim->bio_max_bytes = UINT_MAX;
lim->max_segments = BLK_MAX_SEGMENTS;
lim->max_discard_segments = 1;
lim->max_integrity_segments = 0;
@ -141,10 +140,6 @@ void blk_queue_max_hw_sectors(struct request_queue *q, unsigned int max_hw_secto
limits->logical_block_size >> SECTOR_SHIFT);
limits->max_sectors = max_sectors;
if (check_shl_overflow(max_sectors, SECTOR_SHIFT,
&limits->bio_max_bytes))
limits->bio_max_bytes = UINT_MAX;
q->backing_dev_info->io_pages = max_sectors >> (PAGE_SHIFT - 9);
}
EXPORT_SYMBOL(blk_queue_max_hw_sectors);

4
include/linux/bio.h
View File

@ -106,8 +106,6 @@ static inline void *bio_data(struct bio *bio)
return NULL;
}
extern unsigned int bio_max_size(struct bio *bio);
/**
* bio_full - check if the bio is full
* @bio: bio to check
@ -121,7 +119,7 @@ static inline bool bio_full(struct bio *bio, unsigned len)
if (bio->bi_vcnt >= bio->bi_max_vecs)
return true;
if (bio->bi_iter.bi_size > bio_max_size(bio) - len)
if (bio->bi_iter.bi_size > UINT_MAX - len)
return true;
return false;

2
include/linux/blkdev.h
View File

@ -326,8 +326,6 @@ enum blk_bounce {
};
struct queue_limits {
unsigned int bio_max_bytes;
enum blk_bounce bounce;
unsigned long seg_boundary_mask;
unsigned long virt_boundary_mask;