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ntfs3: replace ll_rw_block()

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ll_rw_block() is not safe for the sync read path because it cannot
guarantee that submitting read IO if the buffer has been locked. We
could get false positive EIO after wait_on_buffer() if the buffer has
been locked by others. So stop using ll_rw_block() in
ntfs_get_block_vbo().

Link: https://lkml.kernel.org/r/20220901133505.2510834-8-yi.zhang@huawei.com
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Zhang Yi 2022-09-01 21:34:58 +08:00 committed by Andrew Morton
parent 8c004d1fc1
commit 6bf414a00a
1 changed files with 2 additions and 5 deletions
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7
fs/ntfs3/inode.c
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@ -630,12 +630,9 @@ static noinline int ntfs_get_block_vbo(struct inode *inode, u64 vbo,
bh->b_size = block_size;
off = vbo & (PAGE_SIZE - 1);
set_bh_page(bh, page, off);
ll_rw_block(REQ_OP_READ, 1, &bh);
wait_on_buffer(bh);
if (!buffer_uptodate(bh)) {
err = -EIO;
err = bh_read(bh, 0);
if (err < 0)
goto out;
}
zero_user_segment(page, off + voff, off + block_size);
}
}