@@ -878,6 +878,42 @@
'*x_flush_latency_histogram': 'BlockLatencyHistogramInfo' } }
##
+# @BlockStatsSpecificFile:
+#
+# File driver statistics
+#
+# @discard-nb-ok: The number of succeeded discard operations performed by
+# the driver.
+#
+# @discard-nb-failed: The number of failed discard operations performed by
+# the driver.
+#
+# @discard-bytes-ok: The number of bytes discarded by the driver.
+#
+# Since 3.1
+##
+{ 'struct': 'BlockStatsSpecificFile',
+ 'data': {
+ 'discard-nb-ok': 'int',
+ 'discard-nb-failed': 'int',
+ 'discard-bytes-ok': 'int'
+ } }
+
+##
+# @BlockStatsSpecific:
+#
+# Block driver specific statistics
+#
+# Since: 3.1
+##
+{ 'union': 'BlockStatsSpecific',
+ 'base': { 'driver': 'BlockdevDriver' },
+ 'discriminator': 'driver',
+ 'data': {
+ 'file': 'BlockStatsSpecificFile'
+ } }
+
+##
# @BlockStats:
#
# Statistics of a virtual block device or a block backing device.
@@ -892,6 +928,8 @@
#
# @stats: A @BlockDeviceStats for the device.
#
+# @driver-specific: Optional driver-specific stats. (Since 3.1)
+#
# @parent: This describes the file block device if it has one.
# Contains recursively the statistics of the underlying
# protocol (e.g. the host file for a qcow2 image). If there is
@@ -905,6 +943,7 @@
{ 'struct': 'BlockStats',
'data': {'*device': 'str', '*qdev': 'str', '*node-name': 'str',
'stats': 'BlockDeviceStats',
+ '*driver-specific': 'BlockStatsSpecific',
'*parent': 'BlockStats',
'*backing': 'BlockStats'} }
@@ -478,6 +478,7 @@ const char *bdrv_get_device_or_node_name(const BlockDriverState *bs);
int bdrv_get_flags(BlockDriverState *bs);
int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi);
ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs);
+BlockStatsSpecific *bdrv_get_specific_stats(BlockDriverState *bs);
void bdrv_round_to_clusters(BlockDriverState *bs,
int64_t offset, int64_t bytes,
int64_t *cluster_offset,
@@ -320,6 +320,7 @@ struct BlockDriver {
Error **errp);
int (*bdrv_get_info)(BlockDriverState *bs, BlockDriverInfo *bdi);
ImageInfoSpecific *(*bdrv_get_specific_info)(BlockDriverState *bs);
+ BlockStatsSpecific *(*bdrv_get_specific_stats)(BlockDriverState *bs);
int coroutine_fn (*bdrv_save_vmstate)(BlockDriverState *bs,
QEMUIOVector *qiov,
@@ -4200,6 +4200,15 @@ ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs)
return NULL;
}
+BlockStatsSpecific *bdrv_get_specific_stats(BlockDriverState *bs)
+{
+ BlockDriver *drv = bs->drv;
+ if (!drv || !drv->bdrv_get_specific_stats) {
+ return NULL;
+ }
+ return drv->bdrv_get_specific_stats(bs);
+}
+
void bdrv_debug_event(BlockDriverState *bs, BlkdebugEvent event)
{
if (!bs || !bs->drv || !bs->drv->bdrv_debug_event) {
@@ -2623,6 +2623,21 @@ static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
return 0;
}
+static BlockStatsSpecific *raw_get_specific_stats(BlockDriverState *bs)
+{
+ BDRVRawState *s = bs->opaque;
+ BlockStatsSpecific *stats = g_new(BlockStatsSpecific, 1);
+
+ stats->driver = BLOCKDEV_DRIVER_FILE;
+ stats->u.file = (BlockStatsSpecificFile){
+ .discard_nb_ok = s->stats.discard_nb_ok,
+ .discard_nb_failed = s->stats.discard_nb_failed,
+ .discard_bytes_ok = s->stats.discard_bytes_ok,
+ };
+
+ return stats;
+}
+
static QemuOptsList raw_create_opts = {
.name = "raw-create-opts",
.head = QTAILQ_HEAD_INITIALIZER(raw_create_opts.head),
@@ -2734,6 +2749,7 @@ BlockDriver bdrv_file = {
.bdrv_get_info = raw_get_info,
.bdrv_get_allocated_file_size
= raw_get_allocated_file_size,
+ .bdrv_get_specific_stats = raw_get_specific_stats,
.bdrv_check_perm = raw_check_perm,
.bdrv_set_perm = raw_set_perm,
.bdrv_abort_perm_update = raw_abort_perm_update,
@@ -3219,6 +3235,7 @@ static BlockDriver bdrv_host_device = {
.bdrv_get_info = raw_get_info,
.bdrv_get_allocated_file_size
= raw_get_allocated_file_size,
+ .bdrv_get_specific_stats = raw_get_specific_stats,
.bdrv_check_perm = raw_check_perm,
.bdrv_set_perm = raw_set_perm,
.bdrv_abort_perm_update = raw_abort_perm_update,
@@ -535,6 +535,11 @@ static BlockStats *bdrv_query_bds_stats(BlockDriverState *bs,
s->stats->wr_highest_offset = stat64_get(&bs->wr_highest_offset);
+ s->driver_specific = bdrv_get_specific_stats(bs);
+ if (s->driver_specific) {
+ s->has_driver_specific = true;
+ }
+
if (bs->file) {
s->has_parent = true;
s->parent = bdrv_query_bds_stats(bs->file->bs, blk_level);
@@ -15,6 +15,8 @@ Testing: -drive driver=null-co,if=virtio
{
"device": "virtio0",
"stats": {
+ "unmap_operations": 0,
+ "unmap_merged": 0,
"flush_total_time_ns": 0,
"wr_highest_offset": 0,
"wr_total_time_ns": 0,
@@ -24,13 +26,17 @@ Testing: -drive driver=null-co,if=virtio
"wr_bytes": 0,
"timed_stats": [
],
+ "failed_unmap_operations": 0,
"failed_flush_operations": 0,
"account_invalid": true,
"rd_total_time_ns": 0,
+ "invalid_unmap_operations": 0,
"flush_operations": 0,
"wr_operations": 0,
+ "unmap_bytes": 0,
"rd_merged": 0,
"rd_bytes": 0,
+ "unmap_total_time_ns": 0,
"invalid_flush_operations": 0,
"account_failed": true,
"rd_operations": 0,
@@ -73,6 +79,8 @@ Testing: -drive driver=null-co,if=none
{
"device": "none0",
"stats": {
+ "unmap_operations": 0,
+ "unmap_merged": 0,
"flush_total_time_ns": 0,
"wr_highest_offset": 0,
"wr_total_time_ns": 0,
@@ -82,13 +90,17 @@ Testing: -drive driver=null-co,if=none
"wr_bytes": 0,
"timed_stats": [
],
+ "failed_unmap_operations": 0,
"failed_flush_operations": 0,
"account_invalid": true,
"rd_total_time_ns": 0,
+ "invalid_unmap_operations": 0,
"flush_operations": 0,
"wr_operations": 0,
+ "unmap_bytes": 0,
"rd_merged": 0,
"rd_bytes": 0,
+ "unmap_total_time_ns": 0,
"invalid_flush_operations": 0,
"account_failed": true,
"rd_operations": 0,
@@ -160,6 +172,8 @@ Testing: -blockdev driver=null-co,node-name=null -device virtio-blk,drive=null,i
{
"device": "",
"stats": {
+ "unmap_operations": 0,
+ "unmap_merged": 0,
"flush_total_time_ns": 0,
"wr_highest_offset": 0,
"wr_total_time_ns": 0,
@@ -169,13 +183,17 @@ Testing: -blockdev driver=null-co,node-name=null -device virtio-blk,drive=null,i
"wr_bytes": 0,
"timed_stats": [
],
+ "failed_unmap_operations": 0,
"failed_flush_operations": 0,
"account_invalid": false,
"rd_total_time_ns": 0,
+ "invalid_unmap_operations": 0,
"flush_operations": 0,
"wr_operations": 0,
+ "unmap_bytes": 0,
"rd_merged": 0,
"rd_bytes": 0,
+ "unmap_total_time_ns": 0,
"invalid_flush_operations": 0,
"account_failed": false,
"rd_operations": 0,
A block driver can provide a callback to report driver-specific statistics. file-posix driver now reports discard statistics Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com> --- qapi/block-core.json | 39 +++++++++++++++++++++++++++++++++++++++ include/block/block.h | 1 + include/block/block_int.h | 1 + block.c | 9 +++++++++ block/file-posix.c | 17 +++++++++++++++++ block/qapi.c | 5 +++++ tests/qemu-iotests/227.out | 18 ++++++++++++++++++ 7 files changed, 90 insertions(+)