[Qemu-devel] [PATCH v4 0/2] improve block-latency-histogram-set

[Qemu-devel] [PATCH v4 0/2] improve block-latency-histogram-set

[Vladimir Sementsov-Ogievskiy]

Move to QOM path for block-latency-histogram-set and drop x- prefix.

v4:
01: update definition of @id [Markus]
    go only through qmp_get_blk [Kevin]

Vladimir Sementsov-Ogievskiy (2):
  qapi: move to QOM path for x-block-latency-histogram-set
  qapi: drop x- from x-block-latency-histogram-set

 qapi/block-core.json | 24 ++++++++++++------------
 block/qapi.c         | 12 ++++++------
 blockdev.c           | 14 +++++++-------
 3 files changed, 25 insertions(+), 25 deletions(-)

-- 
2.18.0

[Qemu-devel] [PATCH v4 1/2] qapi: move to QOM path for x-block-latency-histogram-set

[Vladimir Sementsov-Ogievskiy]

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
 qapi/block-core.json |  4 ++--
 blockdev.c           | 12 ++++++------
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/qapi/block-core.json b/qapi/block-core.json
index 2b8afbb924..8187de0836 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -541,7 +541,7 @@
 # If only @device parameter is specified, remove all present latency histograms
 # for the device. Otherwise, add/reset some of (or all) latency histograms.
 #
-# @device: device name to set latency histogram for.
+# @id: The name or QOM path of the guest device.
 #
 # @boundaries: list of interval boundary values (see description in
 #              BlockLatencyHistogramInfo definition). If specified, all
@@ -599,7 +599,7 @@
 # <- { "return": {} }
 ##
 { 'command': 'x-block-latency-histogram-set',
-  'data': {'device': 'str',
+  'data': {'id': 'str',
            '*boundaries': ['uint64'],
            '*boundaries-read': ['uint64'],
            '*boundaries-write': ['uint64'],
diff --git a/blockdev.c b/blockdev.c
index 7e6bf9955c..f67132d4f8 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -4451,21 +4451,21 @@ void qmp_x_blockdev_set_iothread(const char *node_name, StrOrNull *iothread,
 }
 
 void qmp_x_block_latency_histogram_set(
-    const char *device,
+    const char *id,
     bool has_boundaries, uint64List *boundaries,
     bool has_boundaries_read, uint64List *boundaries_read,
     bool has_boundaries_write, uint64List *boundaries_write,
     bool has_boundaries_flush, uint64List *boundaries_flush,
     Error **errp)
 {
-    BlockBackend *blk = blk_by_name(device);
+    BlockBackend *blk = qmp_get_blk(NULL, id, errp);
     BlockAcctStats *stats;
     int ret;
 
     if (!blk) {
-        error_setg(errp, "Device '%s' not found", device);
         return;
     }
+
     stats = blk_get_stats(blk);
 
     if (!has_boundaries && !has_boundaries_read && !has_boundaries_write &&
@@ -4480,7 +4480,7 @@ void qmp_x_block_latency_histogram_set(
             stats, BLOCK_ACCT_READ,
             has_boundaries_read ? boundaries_read : boundaries);
         if (ret) {
-            error_setg(errp, "Device '%s' set read boundaries fail", device);
+            error_setg(errp, "Device '%s' set read boundaries fail", id);
             return;
         }
     }
@@ -4490,7 +4490,7 @@ void qmp_x_block_latency_histogram_set(
             stats, BLOCK_ACCT_WRITE,
             has_boundaries_write ? boundaries_write : boundaries);
         if (ret) {
-            error_setg(errp, "Device '%s' set write boundaries fail", device);
+            error_setg(errp, "Device '%s' set write boundaries fail", id);
             return;
         }
     }
@@ -4500,7 +4500,7 @@ void qmp_x_block_latency_histogram_set(
             stats, BLOCK_ACCT_FLUSH,
             has_boundaries_flush ? boundaries_flush : boundaries);
         if (ret) {
-            error_setg(errp, "Device '%s' set flush boundaries fail", device);
+            error_setg(errp, "Device '%s' set flush boundaries fail", id);
             return;
         }
     }
-- 
2.18.0

[Qemu-devel] [PATCH v4 2/2] qapi: drop x- from x-block-latency-histogram-set

[Vladimir Sementsov-Ogievskiy]

Drop x- and x_ prefixes for latency histograms and update version to
3.1

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
 qapi/block-core.json | 20 ++++++++++----------
 block/qapi.c         | 12 ++++++------
 blockdev.c           |  2 +-
 3 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/qapi/block-core.json b/qapi/block-core.json
index 8187de0836..636626dd70 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -528,13 +528,13 @@
 #         +------------------
 #             10   50   100
 #
-# Since: 2.12
+# Since: 4.0
 ##
 { 'struct': 'BlockLatencyHistogramInfo',
   'data': {'boundaries': ['uint64'], 'bins': ['uint64'] } }
 
 ##
-# @x-block-latency-histogram-set:
+# @block-latency-histogram-set:
 #
 # Manage read, write and flush latency histograms for the device.
 #
@@ -564,7 +564,7 @@
 #
 # Returns: error if device is not found or any boundary arrays are invalid.
 #
-# Since: 2.12
+# Since: 4.0
 #
 # Example: set new histograms for all io types with intervals
 # [0, 10), [10, 50), [50, 100), [100, +inf):
@@ -598,7 +598,7 @@
 #      "arguments": { "device": "drive0" } }
 # <- { "return": {} }
 ##
-{ 'command': 'x-block-latency-histogram-set',
+{ 'command': 'block-latency-histogram-set',
   'data': {'id': 'str',
            '*boundaries': ['uint64'],
            '*boundaries-read': ['uint64'],
@@ -885,11 +885,11 @@
 # @timed_stats: Statistics specific to the set of previously defined
 #               intervals of time (Since 2.5)
 #
-# @x_rd_latency_histogram: @BlockLatencyHistogramInfo. (Since 2.12)
+# @rd_latency_histogram: @BlockLatencyHistogramInfo. (Since 4.0)
 #
-# @x_wr_latency_histogram: @BlockLatencyHistogramInfo. (Since 2.12)
+# @wr_latency_histogram: @BlockLatencyHistogramInfo. (Since 4.0)
 #
-# @x_flush_latency_histogram: @BlockLatencyHistogramInfo. (Since 2.12)
+# @flush_latency_histogram: @BlockLatencyHistogramInfo. (Since 4.0)
 #
 # Since: 0.14.0
 ##
@@ -904,9 +904,9 @@
            'invalid_wr_operations': 'int', 'invalid_flush_operations': 'int',
            'account_invalid': 'bool', 'account_failed': 'bool',
            'timed_stats': ['BlockDeviceTimedStats'],
-           '*x_rd_latency_histogram': 'BlockLatencyHistogramInfo',
-           '*x_wr_latency_histogram': 'BlockLatencyHistogramInfo',
-           '*x_flush_latency_histogram': 'BlockLatencyHistogramInfo' } }
+           '*rd_latency_histogram': 'BlockLatencyHistogramInfo',
+           '*wr_latency_histogram': 'BlockLatencyHistogramInfo',
+           '*flush_latency_histogram': 'BlockLatencyHistogramInfo' } }
 
 ##
 # @BlockStats:
diff --git a/block/qapi.c b/block/qapi.c
index 6002a768f8..21edab34fc 100644
--- a/block/qapi.c
+++ b/block/qapi.c
@@ -493,14 +493,14 @@ static void bdrv_query_blk_stats(BlockDeviceStats *ds, BlockBackend *blk)
     }
 
     bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_READ],
-                                 &ds->has_x_rd_latency_histogram,
-                                 &ds->x_rd_latency_histogram);
+                                 &ds->has_rd_latency_histogram,
+                                 &ds->rd_latency_histogram);
     bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_WRITE],
-                                 &ds->has_x_wr_latency_histogram,
-                                 &ds->x_wr_latency_histogram);
+                                 &ds->has_wr_latency_histogram,
+                                 &ds->wr_latency_histogram);
     bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_FLUSH],
-                                 &ds->has_x_flush_latency_histogram,
-                                 &ds->x_flush_latency_histogram);
+                                 &ds->has_flush_latency_histogram,
+                                 &ds->flush_latency_histogram);
 }
 
 static BlockStats *bdrv_query_bds_stats(BlockDriverState *bs,
diff --git a/blockdev.c b/blockdev.c
index f67132d4f8..6f0321a1ec 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -4450,7 +4450,7 @@ void qmp_x_blockdev_set_iothread(const char *node_name, StrOrNull *iothread,
     aio_context_release(old_context);
 }
 
-void qmp_x_block_latency_histogram_set(
+void qmp_block_latency_histogram_set(
     const char *id,
     bool has_boundaries, uint64List *boundaries,
     bool has_boundaries_read, uint64List *boundaries_read,
-- 
2.18.0

Re: [Qemu-devel] [PATCH v4 1/2] qapi: move to QOM path for x-block-latency-histogram-set

[Kevin Wolf]

Am 05.03.2019 um 13:53 hat Vladimir Sementsov-Ogievskiy geschrieben:
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> ---
>  qapi/block-core.json |  4 ++--
>  blockdev.c           | 12 ++++++------
>  2 files changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/qapi/block-core.json b/qapi/block-core.json
> index 2b8afbb924..8187de0836 100644
> --- a/qapi/block-core.json
> +++ b/qapi/block-core.json
> @@ -541,7 +541,7 @@
>  # If only @device parameter is specified, remove all present latency histograms

@device doesn't exist any more, so this should become @id.

The examples below need to be changed, too.

>  # for the device. Otherwise, add/reset some of (or all) latency histograms.
>  #
> -# @device: device name to set latency histogram for.
> +# @id: The name or QOM path of the guest device.
>  #
>  # @boundaries: list of interval boundary values (see description in
>  #              BlockLatencyHistogramInfo definition). If specified, all
> @@ -599,7 +599,7 @@
>  # <- { "return": {} }
>  ##
>  { 'command': 'x-block-latency-histogram-set',
> -  'data': {'device': 'str',
> +  'data': {'id': 'str',
>             '*boundaries': ['uint64'],
>             '*boundaries-read': ['uint64'],
>             '*boundaries-write': ['uint64'],

The rest of the series looks good to me.

Kevin