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btrfs: calculate end of bio offset properly
Use the bvec offset and len members to prepare for multipage bvecs. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David Sterba <dsterba@suse.com>
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1 changed files with 8 additions and 2 deletions
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@ -445,6 +445,13 @@ int btrfs_submit_compressed_write(struct inode *inode, u64 start,
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return 0;
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}
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static u64 bio_end_offset(struct bio *bio)
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{
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struct bio_vec *last = &bio->bi_io_vec[bio->bi_vcnt - 1];
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return page_offset(last->bv_page) + last->bv_len + last->bv_offset;
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}
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static noinline int add_ra_bio_pages(struct inode *inode,
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u64 compressed_end,
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struct compressed_bio *cb)
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@ -463,8 +470,7 @@ static noinline int add_ra_bio_pages(struct inode *inode,
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u64 end;
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int misses = 0;
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page = cb->orig_bio->bi_io_vec[cb->orig_bio->bi_vcnt - 1].bv_page;
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last_offset = (page_offset(page) + PAGE_SIZE);
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last_offset = bio_end_offset(cb->orig_bio);
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em_tree = &BTRFS_I(inode)->extent_tree;
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tree = &BTRFS_I(inode)->io_tree;
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