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Revision 0a35d1622d5cd7693d75b7124913c75a7e3fabd0 authored by Linus Torvalds on 01 July 2022, 17:52:01 UTC, committed by Linus Torvalds on 01 July 2022, 17:52:01 UTC 
Merge tag 'io_uring-5.19-2022-07-01' of git://git.kernel.dk/linux-block
 
Pull io_uring fixes from Jens Axboe:
 "Two minor tweaks:

   - While we still can, adjust the send/recv based flags to be in
     ->ioprio rather than in ->addr2. This is consistent with eg accept,
     and also doesn't waste a full 64-bit field for flags (Pavel)

   - 5.18-stable fix for re-importing provided buffers. Not much real
     world relevance here as it'll only impact non-pollable files gone
     async, which is more of a practical test case rather than something
     that is used in the wild (Dylan)"

* tag 'io_uring-5.19-2022-07-01' of git://git.kernel.dk/linux-block:
  io_uring: fix provided buffer import
  io_uring: keep sendrecv flags in ioprio
2 parent s d516e22 + 09007af
Raw File
xfs_bio_io.c 
// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2019 Christoph Hellwig.
 */
#include "xfs.h"

static inline unsigned int bio_max_vecs(unsigned int count)
{
	return bio_max_segs(howmany(count, PAGE_SIZE));
}

int
xfs_rw_bdev(
	struct block_device	*bdev,
	sector_t		sector,
	unsigned int		count,
	char			*data,
	unsigned int		op)

{
	unsigned int		is_vmalloc = is_vmalloc_addr(data);
	unsigned int		left = count;
	int			error;
	struct bio		*bio;

	if (is_vmalloc && op == REQ_OP_WRITE)
		flush_kernel_vmap_range(data, count);

	bio = bio_alloc(bdev, bio_max_vecs(left), op | REQ_META | REQ_SYNC,
			GFP_KERNEL);
	bio->bi_iter.bi_sector = sector;

	do {
		struct page	*page = kmem_to_page(data);
		unsigned int	off = offset_in_page(data);
		unsigned int	len = min_t(unsigned, left, PAGE_SIZE - off);

		while (bio_add_page(bio, page, len, off) != len) {
			struct bio	*prev = bio;

			bio = bio_alloc(prev->bi_bdev, bio_max_vecs(left),
					prev->bi_opf, GFP_KERNEL);
			bio->bi_iter.bi_sector = bio_end_sector(prev);
			bio_chain(prev, bio);

			submit_bio(prev);
		}

		data += len;
		left -= len;
	} while (left > 0);

	error = submit_bio_wait(bio);
	bio_put(bio);

	if (is_vmalloc && op == REQ_OP_READ)
		invalidate_kernel_vmap_range(data, count);
	return error;
}
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