io_uring/cmd: Pass compat mode in issue_flags

Create a new flag to track if the operation is running compat mode.
This basically check the context->compat and pass it to the issue_flags,
so, it could be queried later in the callbacks.

Signed-off-by: Breno Leitao <[e-mail]>
Reviewed-by: Gabriel Krisman Bertazi <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jens Axboe <[e-mail]>

include/linux/io_uring.h

···
 
 	/* set when uring wants to cancel a previously issued command */
 	IO_URING_F_CANCEL		= (1 << 11),
+	IO_URING_F_COMPAT		= (1 << 12),
 };
 
 /* only top 8 bits of sqe->uring_cmd_flags for kernel internal use */

io_uring/uring_cmd.c

···
 		issue_flags |= IO_URING_F_SQE128;
 	if (ctx->flags & IORING_SETUP_CQE32)
 		issue_flags |= IO_URING_F_CQE32;
+	if (ctx->compat)
+		issue_flags |= IO_URING_F_COMPAT;
 	if (ctx->flags & IORING_SETUP_IOPOLL) {
 		if (!file->f_op->uring_cmd_iopoll)
 			return -EOPNOTSUPP;