io_uring: use the text representation of ops in trace

It is annoying to translate opcodes to textwhen tracing io_uring. Use the
io_uring_get_opcode function instead to use the text representation.

A downside here might have been that if the opcode is invalid it will not
be obvious, however the opcode is already overridden in these cases to
0 (NOP) in io_init_req(). Therefore this is a non issue.
Signed-off-by: Dylan Yudaken <dylany@fb.com>
Link: https://lore.kernel.org/r/20220426082907.3600028-5-dylany@fb.com
[axboe: don't include register, those are not req opcodes]
Signed-off-by: Jens Axboe <axboe@kernel.dk>

include/trace/events/io_uring.h

@@ -7,6 +7,7 @@
 
 #include <linux/tracepoint.h>
 #include <uapi/linux/io_uring.h>
+#include <linux/io_uring.h>
 
 struct io_wq_work;
 
@@ -169,8 +170,9 @@ TRACE_EVENT(io_uring_queue_async_work,
 		__entry->rw		= rw;
 	),
 
-	TP_printk("ring %p, request %p, user_data 0x%llx, opcode %d, flags 0x%x, %s queue, work %p",
-		__entry->ctx, __entry->req, __entry->user_data, __entry->opcode,
+	TP_printk("ring %p, request %p, user_data 0x%llx, opcode %s, flags 0x%x, %s queue, work %p",
+		__entry->ctx, __entry->req, __entry->user_data,
+		io_uring_get_opcode(__entry->opcode),
 		__entry->flags, __entry->rw ? "hashed" : "normal", __entry->work)
 );
 
@@ -205,8 +207,9 @@ TRACE_EVENT(io_uring_defer,
 		__entry->opcode	= opcode;
 	),
 
-	TP_printk("ring %p, request %p, user_data 0x%llx, opcode %d",
-		__entry->ctx, __entry->req, __entry->data, __entry->opcode)
+	TP_printk("ring %p, request %p, user_data 0x%llx, opcode %s",
+		__entry->ctx, __entry->req, __entry->data,
+		io_uring_get_opcode(__entry->opcode))
 );
 
 /**
@@ -305,9 +308,9 @@ TRACE_EVENT(io_uring_fail_link,
 		__entry->link		= link;
 	),
 
-	TP_printk("ring %p, request %p, user_data 0x%llx, opcode %d, link %p",
-		__entry->ctx, __entry->req, __entry->user_data, __entry->opcode,
-		__entry->link)
+	TP_printk("ring %p, request %p, user_data 0x%llx, opcode %s, link %p",
+		__entry->ctx, __entry->req, __entry->user_data,
+		io_uring_get_opcode(__entry->opcode), __entry->link)
 );
 
 /**
@@ -389,9 +392,9 @@ TRACE_EVENT(io_uring_submit_sqe,
 		__entry->sq_thread	= sq_thread;
 	),
 
-	TP_printk("ring %p, req %p, user_data 0x%llx, opcode %d, flags 0x%x, "
+	TP_printk("ring %p, req %p, user_data 0x%llx, opcode %s, flags 0x%x, "
 		  "non block %d, sq_thread %d", __entry->ctx, __entry->req,
-		  __entry->user_data, __entry->opcode,
+		  __entry->user_data, io_uring_get_opcode(__entry->opcode),
 		  __entry->flags, __entry->force_nonblock, __entry->sq_thread)
 );
 
@@ -433,8 +436,9 @@ TRACE_EVENT(io_uring_poll_arm,
 		__entry->events		= events;
 	),
 
-	TP_printk("ring %p, req %p, user_data 0x%llx, opcode %d, mask 0x%x, events 0x%x",
-		  __entry->ctx, __entry->req, __entry->user_data, __entry->opcode,
+	TP_printk("ring %p, req %p, user_data 0x%llx, opcode %s, mask 0x%x, events 0x%x",
+		  __entry->ctx, __entry->req, __entry->user_data,
+		  io_uring_get_opcode(__entry->opcode),
 		  __entry->mask, __entry->events)
 );
 
@@ -470,8 +474,9 @@ TRACE_EVENT(io_uring_task_add,
 		__entry->mask		= mask;
 	),
 
-	TP_printk("ring %p, req %p, user_data 0x%llx, opcode %d, mask %x",
-		__entry->ctx, __entry->req, __entry->user_data, __entry->opcode,
+	TP_printk("ring %p, req %p, user_data 0x%llx, opcode %s, mask %x",
+		__entry->ctx, __entry->req, __entry->user_data,
+		io_uring_get_opcode(__entry->opcode),
 		__entry->mask)
 );
 
@@ -530,12 +535,13 @@ TRACE_EVENT(io_uring_req_failed,
 	),
 
 	TP_printk("ring %p, req %p, user_data 0x%llx, "
-		  "opcode %d, flags 0x%x, prio=%d, off=%llu, addr=%llu, "
+		  "opcode %s, flags 0x%x, prio=%d, off=%llu, addr=%llu, "
 		  "len=%u, rw_flags=0x%x, buf_index=%d, "
 		  "personality=%d, file_index=%d, pad=0x%llx, addr3=%llx, "
 		  "error=%d",
 		  __entry->ctx, __entry->req, __entry->user_data,
-		  __entry->opcode, __entry->flags, __entry->ioprio,
+		  io_uring_get_opcode(__entry->opcode),
+		  __entry->flags, __entry->ioprio,
 		  (unsigned long long)__entry->off,
 		  (unsigned long long) __entry->addr, __entry->len,
 		  __entry->op_flags,