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[Qemu-devel] [PATCH RFC v3 1/2] block/qapi: reduce the coupling between
From: |
Dou Liyang |
Subject: |
[Qemu-devel] [PATCH RFC v3 1/2] block/qapi: reduce the coupling between the bdrv_query_stats and bdrv_query_bds_stats |
Date: |
Wed, 4 Jan 2017 14:58:10 +0800 |
the bdrv_query_stats and bdrv_query_bds_stats functions need to call
each other, that increases the coupling. it also makes the program
complicated and makes some unnecessary judgements.
remove the call from bdrv_query_bds_stats to bdrv_query_stats, just
take some recursion to make it clearly.
avoid judging whether the blk is NULL during querying the bds stats.
it is unnecessary.
Signed-off-by: Dou Liyang <address@hidden>
---
block/qapi.c | 26 ++++++++++++++------------
1 file changed, 14 insertions(+), 12 deletions(-)
diff --git a/block/qapi.c b/block/qapi.c
index a62e862..bc622cd 100644
--- a/block/qapi.c
+++ b/block/qapi.c
@@ -357,10 +357,6 @@ static void bdrv_query_info(BlockBackend *blk, BlockInfo
**p_info,
qapi_free_BlockInfo(info);
}
-static BlockStats *bdrv_query_stats(BlockBackend *blk,
- const BlockDriverState *bs,
- bool query_backing);
-
static void bdrv_query_blk_stats(BlockDeviceStats *ds, BlockBackend *blk)
{
BlockAcctStats *stats = blk_get_stats(blk);
@@ -428,9 +424,18 @@ static void bdrv_query_blk_stats(BlockDeviceStats *ds,
BlockBackend *blk)
}
}
-static void bdrv_query_bds_stats(BlockStats *s, const BlockDriverState *bs,
+static BlockStats *bdrv_query_bds_stats(const BlockDriverState *bs,
bool query_backing)
{
+ BlockStats *s = NULL;
+
+ s = g_malloc0(sizeof(*s));
+ s->stats = g_malloc0(sizeof(*s->stats));
+
+ if (!bs) {
+ return s;
+ }
+
if (bdrv_get_node_name(bs)[0]) {
s->has_node_name = true;
s->node_name = g_strdup(bdrv_get_node_name(bs));
@@ -440,14 +445,15 @@ static void bdrv_query_bds_stats(BlockStats *s, const
BlockDriverState *bs,
if (bs->file) {
s->has_parent = true;
- s->parent = bdrv_query_stats(NULL, bs->file->bs, query_backing);
+ s->parent = bdrv_query_bds_stats(bs->file->bs, query_backing);
}
if (query_backing && bs->backing) {
s->has_backing = true;
- s->backing = bdrv_query_stats(NULL, bs->backing->bs, query_backing);
+ s->backing = bdrv_query_bds_stats(bs->backing->bs, query_backing);
}
+ return s;
}
static BlockStats *bdrv_query_stats(BlockBackend *blk,
@@ -456,17 +462,13 @@ static BlockStats *bdrv_query_stats(BlockBackend *blk,
{
BlockStats *s;
- s = g_malloc0(sizeof(*s));
- s->stats = g_malloc0(sizeof(*s->stats));
+ s = bdrv_query_bds_stats(bs, query_backing);
if (blk) {
s->has_device = true;
s->device = g_strdup(blk_name(blk));
bdrv_query_blk_stats(s->stats, blk);
}
- if (bs) {
- bdrv_query_bds_stats(s, bs, query_backing);
- }
return s;
}
--
2.5.5