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Jan Kara authored
Assume a filesystem with 4KB blocks. When a file has size 1000 bytes and we issue direct IO read at offset 1024, blockdev_direct_IO() reads the tail of the last block and the logic for handling short DIO reads in dio_complete() results in a return value -24 (1000 - 1024) which obviously confuses userspace. Fix the problem by bailing out early once we sample i_size and can reliably check that direct IO read starts beyond i_size. Reported-by:
Avi Kivity <avi@scylladb.com> Fixes: 9fe55eea CC: stable@vger.kernel.org CC: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by:
Jan Kara <jack@suse.cz> Signed-off-by:
Jens Axboe <axboe@fb.com>
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