Retain top 8bits of uring_cmd flags for kernel internal use, so that we
can move IORING_URING_CMD_POLLED out of uapi header.
Reviewed-by: Gabriel Krisman Bertazi <krisman@suse.de>
Reviewed-by: Anuj Gupta <anuj20.g@samsung.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
IO_URING_F_IOPOLL = (1 << 10),
};
+/* only top 8 bits of sqe->uring_cmd_flags for kernel internal use */
+#define IORING_URING_CMD_POLLED (1U << 31)
+
struct io_uring_cmd {
struct file *file;
const struct io_uring_sqe *sqe;
};
/*
- * sqe->uring_cmd_flags
+ * sqe->uring_cmd_flags top 8bits aren't available for userspace
* IORING_URING_CMD_FIXED use registered buffer; pass this flag
* along with setting sqe->buf_index.
- * IORING_URING_CMD_POLLED driver use only
*/
#define IORING_URING_CMD_FIXED (1U << 0)
-#define IORING_URING_CMD_POLLED (1U << 31)
+#define IORING_URING_CMD_MASK IORING_URING_CMD_FIXED
/*
BUILD_BUG_ON(sizeof(atomic_t) != sizeof(u32));
+ /* top 8bits are for internal use */
+ BUILD_BUG_ON((IORING_URING_CMD_MASK & 0xff000000) != 0);
+
io_uring_optable_init();
/*
return -EINVAL;
ioucmd->flags = READ_ONCE(sqe->uring_cmd_flags);
- if (ioucmd->flags & ~IORING_URING_CMD_FIXED)
+ if (ioucmd->flags & ~IORING_URING_CMD_MASK)
return -EINVAL;
if (ioucmd->flags & IORING_URING_CMD_FIXED) {