linux-kernel - [PATCH blktrace v3 05/20] blktrace: add definitions for blk_io

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Message-ID: <20251015105658.527262-6-johannes.thumshirn@wdc.com>
Date: Wed, 15 Oct 2025 12:56:43 +0200
From: Johannes Thumshirn <johannes.thumshirn@....com>
To: axboe@...nel.dk
Cc: chaitanyak@...dia.com,
	dlemoal@...nel.org,
	hare@...e.de,
	hch@....de,
	john.g.garry@...cle.com,
	linux-block@...r.kernel.org,
	linux-btrace@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org,
	martin.petersen@...cle.com,
	mathieu.desnoyers@...icios.com,
	mhiramat@...nel.org,
	naohiro.aota@....com,
	rostedt@...dmis.org,
	shinichiro.kawasaki@....com,
	Johannes Thumshirn <johannes.thumshirn@....com>
Subject: [PATCH blktrace v3 05/20] blktrace: add definitions for blk_io_trace2

Add 'struct blk_io_trace2' which represents the extended version of the
blktrace protocol.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@....com>
---
 blktrace_api.h | 38 ++++++++++++++++++++++++++++++++++++--
 1 file changed, 36 insertions(+), 2 deletions(-)

diff --git a/blktrace_api.h b/blktrace_api.h
index ecffe6e..04e81de 100644
--- a/blktrace_api.h
+++ b/blktrace_api.h
@@ -24,11 +24,20 @@ enum {
 	BLK_TC_DRV_DATA	= 1 << 14,	/* binary driver data */
 	BLK_TC_FUA	= 1 << 15,	/* fua requests */
 
-	BLK_TC_END	= 1 << 15,	/* we've run out of bits! */
+	BLK_TC_END_V1	= 1 << 15,	/* we've run out of bits! */
+
+	BLK_TC_ZONE_APPEND      = 1ull << 16,   /* zone append */
+        BLK_TC_ZONE_RESET       = 1ull << 17,   /* zone reset */
+        BLK_TC_ZONE_RESET_ALL   = 1ull << 18,   /* zone reset all */
+        BLK_TC_ZONE_FINISH      = 1ull << 19,   /* zone finish */
+        BLK_TC_ZONE_OPEN        = 1ull << 20,   /* zone open */
+        BLK_TC_ZONE_CLOSE       = 1ull << 21,   /* zone close */
+
+        BLK_TC_END_V2           = 1ull << 21,
 };
 
 #define BLK_TC_SHIFT		(16)
-#define BLK_TC_ACT(act)		((act) << BLK_TC_SHIFT)
+#define BLK_TC_ACT(act)        ((__u64)(act) << BLK_TC_SHIFT)
 
 /*
  * Basic trace actions
@@ -51,6 +60,7 @@ enum {
 	__BLK_TA_REMAP,			/* bio was remapped */
 	__BLK_TA_ABORT,			/* request aborted */
 	__BLK_TA_DRV_DATA,		/* binary driver data */
+	__BLK_TA_ZONE_MGMT,		/* zone management command was issued */
 	__BLK_TA_CGROUP = 1 << 8,
 };
 
@@ -85,12 +95,20 @@ enum blktrace_notify {
 #define BLK_TA_ABORT		(__BLK_TA_ABORT | BLK_TC_ACT(BLK_TC_QUEUE))
 #define BLK_TA_DRV_DATA		(__BLK_TA_DRV_DATA | BLK_TC_ACT(BLK_TC_DRV_DATA))
 
+#define BLK_TA_ZONE_APPEND      (__BLK_TA_COMPLETE |\
+				 BLK_TC_ACT2(BLK_TC_ZONE_APPEND))
+#define BLK_TA_ZONE_MGMT        __BLK_TA_ZONE_MGMT
+#define BLK_TA_ZONE_PLUG        (__BLK_TA_ZONE_PLUG | BLK_TC_ACT(BLK_TC_QUEUE))
+#define BLK_TA_ZONE_UNPLUG      (__BLK_TA_ZONE_UNPLUG |\
+				 BLK_TC_ACT(BLK_TC_QUEUE))
+
 #define BLK_TN_PROCESS		(__BLK_TN_PROCESS | BLK_TC_ACT(BLK_TC_NOTIFY))
 #define BLK_TN_TIMESTAMP	(__BLK_TN_TIMESTAMP | BLK_TC_ACT(BLK_TC_NOTIFY))
 #define BLK_TN_MESSAGE		(__BLK_TN_MESSAGE | BLK_TC_ACT(BLK_TC_NOTIFY))
 
 #define BLK_IO_TRACE_MAGIC	0x65617400
 #define BLK_IO_TRACE_VERSION	0x07
+#define BLK_IO_TRACE2_VERSION	0x08
 
 /*
  * The trace itself
@@ -118,6 +136,22 @@ struct blk_io_trace_remap {
 	__u64 sector_from;
 };
 
+struct blk_io_trace2 {
+	__u32 magic;            /* MAGIC << 8 | BLK_IO_TRACE2_VERSION */
+	__u32 sequence;         /* event number */
+	__u64 time;             /* in nanoseconds */
+	__u64 sector;           /* disk offset */
+	__u32 bytes;            /* transfer length */
+	__u32 pid;              /* who did it */
+	__u64 action;           /* what happened */
+	__u32 device;           /* device number */
+	__u32 cpu;              /* on what cpu did it happen */
+	__u16 error;            /* completion error */
+	__u16 pdu_len;          /* length of data after this trace */
+	__u8 pad[12];
+	/* cgroup id will be stored here if exists */
+};
+
 /*
  * Payload with originating cgroup info
  */
-- 
2.51.0