From 4b1945d3c055de4b49e310f799e6f92c57546349 Mon Sep 17 00:00:00 2001
From: Michael Jeanson <mjeanson@efficios.com>
Date: Sun, 23 Jan 2022 13:11:47 -0500
Subject: [PATCH 2/7] fix: block: remove the ->rq_disk field in struct request
 (v5.17)

See upstream commit :

  commit f3fa33acca9f0058157214800f68b10d8e71ab7a
  Author: Christoph Hellwig <hch@lst.de>
  Date:   Fri Nov 26 13:18:00 2021 +0100

    block: remove the ->rq_disk field in struct request

    Just use the disk attached to the request_queue instead.

    Link: https://lore.kernel.org/r/20211126121802.2090656-4-hch@lst.de

Upstream-Status: Backport [lttng-modules commit 4b1945d3c055de4b49e310f799e6f92c57546349]

Change-Id: I24263be519d1b51f4b00bd95f14a9aeb8457889a
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---
 include/instrumentation/events/block.h | 95 ++++++++++++++++++++++++--
 1 file changed, 91 insertions(+), 4 deletions(-)

diff --git a/include/instrumentation/events/block.h b/include/instrumentation/events/block.h
index 6782c36f..3e1104d7 100644
--- a/include/instrumentation/events/block.h
+++ b/include/instrumentation/events/block.h
@@ -310,7 +310,31 @@ LTTNG_TRACEPOINT_EVENT_INSTANCE(block_rq_with_error, block_rq_abort,
 )
 #endif
 
-#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,11,0))
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,17,0))
+/**
+ * block_rq_requeue - place block IO request back on a queue
+ * @rq: block IO operation request
+ *
+ * The block operation request @rq is being placed back into queue
+ * @q.  For some reason the request was not completed and needs to be
+ * put back in the queue.
+ */
+LTTNG_TRACEPOINT_EVENT(block_rq_requeue,
+
+	TP_PROTO(struct request *rq),
+
+	TP_ARGS(rq),
+
+	TP_FIELDS(
+		ctf_integer(dev_t, dev,
+			rq->q->disk ? disk_devt(rq->q->disk) : 0)
+		ctf_integer(sector_t, sector, blk_rq_trace_sector(rq))
+		ctf_integer(unsigned int, nr_sector, blk_rq_trace_nr_sectors(rq))
+		blk_rwbs_ctf_integer(unsigned int, rwbs,
+			lttng_req_op(rq), lttng_req_rw(rq), blk_rq_bytes(rq))
+	)
+)
+#elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,11,0))
 /**
  * block_rq_requeue - place block IO request back on a queue
  * @rq: block IO operation request
@@ -380,7 +404,24 @@ LTTNG_TRACEPOINT_EVENT_INSTANCE(block_rq_with_error, block_rq_requeue,
  * do for the request. If @rq->bio is non-NULL then there is
  * additional work required to complete the request.
  */
-#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,16,0))
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,17,0))
+LTTNG_TRACEPOINT_EVENT(block_rq_complete,
+
+	TP_PROTO(struct request *rq, blk_status_t error, unsigned int nr_bytes),
+
+	TP_ARGS(rq, error, nr_bytes),
+
+	TP_FIELDS(
+		ctf_integer(dev_t, dev,
+			rq->q->disk ? disk_devt(rq->q->disk) : 0)
+		ctf_integer(sector_t, sector, blk_rq_pos(rq))
+		ctf_integer(unsigned int, nr_sector, nr_bytes >> 9)
+		ctf_integer(int, error, blk_status_to_errno(error))
+		blk_rwbs_ctf_integer(unsigned int, rwbs,
+			lttng_req_op(rq), lttng_req_rw(rq), nr_bytes)
+	)
+)
+#elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,16,0))
 LTTNG_TRACEPOINT_EVENT(block_rq_complete,
 
 	TP_PROTO(struct request *rq, blk_status_t error, unsigned int nr_bytes),
@@ -519,7 +560,26 @@ LTTNG_TRACEPOINT_EVENT_INSTANCE(block_rq_with_error, block_rq_complete,
 
 #endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,15,0)) */
 
-#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,11,0))
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,17,0))
+LTTNG_TRACEPOINT_EVENT_CLASS(block_rq,
+
+	TP_PROTO(struct request *rq),
+
+	TP_ARGS(rq),
+
+	TP_FIELDS(
+		ctf_integer(dev_t, dev,
+			rq->q->disk ? disk_devt(rq->q->disk) : 0)
+		ctf_integer(sector_t, sector, blk_rq_trace_sector(rq))
+		ctf_integer(unsigned int, nr_sector, blk_rq_trace_nr_sectors(rq))
+		ctf_integer(unsigned int, bytes, blk_rq_bytes(rq))
+		ctf_integer(pid_t, tid, current->pid)
+		blk_rwbs_ctf_integer(unsigned int, rwbs,
+			lttng_req_op(rq), lttng_req_rw(rq), blk_rq_bytes(rq))
+		ctf_array_text(char, comm, current->comm, TASK_COMM_LEN)
+	)
+)
+#elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,11,0))
 LTTNG_TRACEPOINT_EVENT_CLASS(block_rq,
 
 	TP_PROTO(struct request *rq),
@@ -1513,7 +1573,34 @@ LTTNG_TRACEPOINT_EVENT(block_bio_remap,
 )
 #endif
 
-#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,11,0))
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,17,0))
+/**
+ * block_rq_remap - map request for a block operation request
+ * @rq: block IO operation request
+ * @dev: device for the operation
+ * @from: original sector for the operation
+ *
+ * The block operation request @rq in @q has been remapped.  The block
+ * operation request @rq holds the current information and @from hold
+ * the original sector.
+ */
+LTTNG_TRACEPOINT_EVENT(block_rq_remap,
+
+	TP_PROTO(struct request *rq, dev_t dev, sector_t from),
+
+	TP_ARGS(rq, dev, from),
+
+	TP_FIELDS(
+		ctf_integer(dev_t, dev, disk_devt(rq->q->disk))
+		ctf_integer(sector_t, sector, blk_rq_pos(rq))
+		ctf_integer(unsigned int, nr_sector, blk_rq_sectors(rq))
+		ctf_integer(dev_t, old_dev, dev)
+		ctf_integer(sector_t, old_sector, from)
+		blk_rwbs_ctf_integer(unsigned int, rwbs,
+			lttng_req_op(rq), lttng_req_rw(rq), blk_rq_bytes(rq))
+	)
+)
+#elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,11,0))
 /**
  * block_rq_remap - map request for a block operation request
  * @rq: block IO operation request
-- 
2.19.1