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d486bbecc9
Delegate to bdev_rw_virt when operating on non-vmalloc memory and use bio_add_vmalloc_chunk to insulate xfs from the details of adding vmalloc memory to a bio. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Link: https://lore.kernel.org/r/20250507120451.4000627-17-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
53 lines
1.1 KiB
C
53 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2019 Christoph Hellwig.
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*/
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#include "xfs.h"
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static inline unsigned int bio_max_vecs(unsigned int count)
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{
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return bio_max_segs(howmany(count, PAGE_SIZE));
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}
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int
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xfs_rw_bdev(
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struct block_device *bdev,
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sector_t sector,
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unsigned int count,
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char *data,
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enum req_op op)
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{
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unsigned int done = 0, added;
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int error;
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struct bio *bio;
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op |= REQ_META | REQ_SYNC;
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if (!is_vmalloc_addr(data))
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return bdev_rw_virt(bdev, sector, data, count, op);
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bio = bio_alloc(bdev, bio_max_vecs(count), op, GFP_KERNEL);
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bio->bi_iter.bi_sector = sector;
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do {
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added = bio_add_vmalloc_chunk(bio, data + done, count - done);
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if (!added) {
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struct bio *prev = bio;
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bio = bio_alloc(prev->bi_bdev,
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bio_max_vecs(count - done),
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prev->bi_opf, GFP_KERNEL);
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bio->bi_iter.bi_sector = bio_end_sector(prev);
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bio_chain(prev, bio);
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submit_bio(prev);
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}
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done += added;
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} while (done < count);
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error = submit_bio_wait(bio);
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bio_put(bio);
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if (op == REQ_OP_READ)
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invalidate_kernel_vmap_range(data, count);
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return error;
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}
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