Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Dylan Yudaken <dylany@fb.com>
To:     <io-uring@vger.kernel.org>
CC:     <axboe@kernel.dk>, <asml.silence@gmail.com>,
        <linux-kernel@vger.kernel.org>, <kernel-team@fb.com>,
        Dylan Yudaken <dylany@fb.com>
Subject: [PATCH 1/6] io_uring: add trace support for CQE overflow
Date:   Thu, 21 Apr 2022 02:13:40 -0700
Message-ID: <20220421091345.2115755-2-dylany@fb.com>
In-Reply-To: <20220421091345.2115755-1-dylany@fb.com>
References: <20220421091345.2115755-1-dylany@fb.com>
MIME-Version: 1.0
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain
Precedence: bulk

Add trace function for overflowing CQ ring.

Signed-off-by: Dylan Yudaken <dylany@fb.com>
---
 include/trace/events/io_uring.h | 42 ++++++++++++++++++++++++++++++++-
 1 file changed, 41 insertions(+), 1 deletion(-)

diff --git a/include/trace/events/io_uring.h b/include/trace/events/io_ur=
ing.h
index cddf5b6fbeb4..42534ec2ab9d 100644
--- a/include/trace/events/io_uring.h
+++ b/include/trace/events/io_uring.h
@@ -530,7 +530,7 @@ TRACE_EVENT(io_uring_req_failed,
 	),
=20
 	TP_printk("ring %p, req %p, user_data 0x%llx, "
-		"op %d, flags 0x%x, prio=3D%d, off=3D%llu, addr=3D%llu, "
+		  "op %d, flags 0x%x, prio=3D%d, off=3D%llu, addr=3D%llu, "
 		  "len=3D%u, rw_flags=3D0x%x, buf_index=3D%d, "
 		  "personality=3D%d, file_index=3D%d, pad=3D0x%llx/%llx, error=3D%d",
 		  __entry->ctx, __entry->req, __entry->user_data,
@@ -543,6 +543,46 @@ TRACE_EVENT(io_uring_req_failed,
 		  (unsigned long long) __entry->pad2, __entry->error)
 );
=20
+
+/*
+ * io_uring_cqe_overflow - a CQE overflowed
+ *
+ * @ctx:		pointer to a ring context structure
+ * @user_data:		user data associated with the request
+ * @res:		CQE result
+ * @cflags:		CQE flags
+ * @ocqe:		pointer to the overflow cqe (if available)
+ *
+ */
+TRACE_EVENT(io_uring_cqe_overflow,
+
+	TP_PROTO(void *ctx, unsigned long long user_data, s32 res, u32 cflags,
+		 void *ocqe),
+
+	TP_ARGS(ctx, user_data, res, cflags, ocqe),
+
+	TP_STRUCT__entry (
+		__field(  void *,		ctx		)
+		__field(  unsigned long long,	user_data	)
+		__field(  s32,			res		)
+		__field(  u32,			cflags		)
+		__field(  void *,		ocqe		)
+	),
+
+	TP_fast_assign(
+		__entry->ctx		=3D ctx;
+		__entry->user_data	=3D user_data;
+		__entry->res		=3D res;
+		__entry->cflags		=3D cflags;
+		__entry->ocqe		=3D ocqe;
+	),
+
+	TP_printk("ring %p, user_data 0x%llx, res %d, flags %x, "
+		  "overflow_cqe %p",
+		  __entry->ctx, __entry->user_data, __entry->res,
+		  __entry->cflags, __entry->ocqe)
+);
+
 #endif /* _TRACE_IO_URING_H */
=20
 /* This part must be outside protection */
--=20
2.30.2