Jens Axboe 9e3aa61ae3
io_uring: ensure we return -EINVAL on unknown opcode ...
If we submit an unknown opcode and have fd == -1, io_op_needs_file()
will return true as we default to needing a file. Then when we go and
assign the file, we find the 'fd' invalid and return -EBADF. We really
should be returning -EINVAL for that case, as we normally do for
unsupported opcodes.
Change io_op_needs_file() to have the following return values:
0 - does not need a file
1 - does need a file
< 0 - error value
and use this to pass back the right value for this invalid case.
Signed-off-by: Jens Axboe <axboe@kernel.dk >
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