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io_uring: warn about unhandled opcode 

Now that we have all the opcodes handled in terms of command prep and
SQE reuse, add a printk_once() to warn about any potentially new and
unhandled ones.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2019-12-17 19:45:06 -07:00
parent d625c6ee49
commit e781573e2f
1 changed files with 6 additions and 2 deletions
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8
fs/io_uring.c
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@ -3079,9 +3079,11 @@ static int io_req_defer_prep(struct io_kiocb *req)
struct iovec inline_vecs[UIO_FASTIOV], *iovec = inline_vecs;
struct io_async_ctx *io = req->io;
struct iov_iter iter;
ssize_t ret;
ssize_t ret = 0;
switch (req->opcode) {
case IORING_OP_NOP:
break;
case IORING_OP_READV:
case IORING_OP_READ_FIXED:
/* ensure prep does right import */
@ -3141,7 +3143,9 @@ static int io_req_defer_prep(struct io_kiocb *req)
ret = io_accept_prep(req);
break;
default:
ret = 0;
printk_once(KERN_WARNING "io_uring: unhandled opcode %d\n",
req->opcode);
ret = -EINVAL;
break;
}