[Qemu-devel] [PATCH v3 3/5] qcow2: add tracepoints for qcow2_co_write_zeroes

[Eric Blake <eblake@redhat.com>]

From: "Denis V. Lunev" <den@openvz.org>

This patch follows guidelines of all other tracepoints in qcow2, like ones
in qcow2_co_writev. I think that they should dump values in the same
quantities or be changed all together.

Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Eric Blake <eblake@redhat.com>
CC: Kevin Wolf <kwolf@redhat.com>
Message-Id: <1463476543-3087-4-git-send-email-den@openvz.org>
[eblake: typo fix in commit message]
Signed-off-by: Eric Blake <eblake@redhat.com>
---
 block/qcow2.c | 5 +++++
 trace-events  | 2 ++
 2 files changed, 7 insertions(+)

diff --git a/block/qcow2.c b/block/qcow2.c
index 2f73201..105fd5e 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -2437,6 +2437,9 @@ static coroutine_fn int qcow2_co_write_zeroes(BlockDriverState *bs,
     int head = sector_num % s->cluster_sectors;
     int tail = (sector_num + nb_sectors) % s->cluster_sectors;

+    trace_qcow2_write_zeroes_start_req(qemu_coroutine_self(), sector_num,
+                                       nb_sectors);
+
     if (head != 0 || tail != 0) {
         int64_t cl_start = sector_num - head;

@@ -2459,6 +2462,8 @@ static coroutine_fn int qcow2_co_write_zeroes(BlockDriverState *bs,
         qemu_co_mutex_lock(&s->lock);
     }

+    trace_qcow2_write_zeroes(qemu_coroutine_self(), sector_num, nb_sectors);
+
     /* Whatever is left can use real zero clusters */
     ret = qcow2_zero_clusters(bs, sector_num << BDRV_SECTOR_BITS, nb_sectors);
     qemu_co_mutex_unlock(&s->lock);
diff --git a/trace-events b/trace-events
index 4450d8f..46726cc 100644
--- a/trace-events
+++ b/trace-events
@@ -612,6 +612,8 @@ qcow2_writev_done_req(void *co, int ret) "co %p ret %d"
 qcow2_writev_start_part(void *co) "co %p"
 qcow2_writev_done_part(void *co, int cur_nr_sectors) "co %p cur_nr_sectors %d"
 qcow2_writev_data(void *co, uint64_t offset) "co %p offset %" PRIx64
+qcow2_write_zeroes_start_req(void *co, int64_t sector, int nb_sectors) "co %p sector %" PRIx64 " nb_sectors %d"
+qcow2_write_zeroes(void *co, int64_t sector, int nb_sectors) "co %p sector %" PRIx64 " nb_sectors %d"

 # block/qcow2-cluster.c
 qcow2_alloc_clusters_offset(void *co, uint64_t offset, int num) "co %p offset %" PRIx64 " num %d"
-- 
2.5.5