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qemu-kvm/SOURCES/kvm-qemu-img-Use-BlockNodeI...

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From dca4cbe680baff837ca8ac8bd39b77b46af3f64b Mon Sep 17 00:00:00 2001
From: Hanna Reitz <hreitz@redhat.com>
Date: Mon, 20 Jun 2022 18:26:57 +0200
Subject: [PATCH 10/20] qemu-img: Use BlockNodeInfo
RH-Author: Hanna Czenczek <hreitz@redhat.com>
RH-MergeRequest: 145: Show protocol-level information in qemu-img info
RH-Bugzilla: 1860292
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
RH-Commit: [5/12] b599af3ec05951a0ba11d9eae2ee19148d6bf624 (hreitz/qemu-kvm-c-9-s)
qemu-img info never uses ImageInfo's backing-image field, because it
opens the backing chain one by one with BDRV_O_NO_BACKING, and prints
all backing chain nodes' information consecutively. Use BlockNodeInfo
to make it clear that we only print information about a single node, and
that we are not using the backing-image field.
Notably, bdrv_image_info_dump() does not evaluate the backing-image
field, so we can easily make it take a BlockNodeInfo pointer (and
consequentially rename it to bdrv_node_info_dump()). It makes more
sense this way, because again, the interface now makes it syntactically
clear that backing-image is ignored by this function.
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220620162704.80987-6-hreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit b1f4cd1589a16fec02f264a09bd3560e4ccce3c2)
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
---
block/monitor/block-hmp-cmds.c | 2 +-
block/qapi.c | 2 +-
include/block/qapi.h | 2 +-
qapi/block-core.json | 4 +--
qemu-img.c | 48 +++++++++++++++++-----------------
5 files changed, 29 insertions(+), 29 deletions(-)
diff --git a/block/monitor/block-hmp-cmds.c b/block/monitor/block-hmp-cmds.c
index b6135e9bfe..aa37faa601 100644
--- a/block/monitor/block-hmp-cmds.c
+++ b/block/monitor/block-hmp-cmds.c
@@ -734,7 +734,7 @@ static void print_block_info(Monitor *mon, BlockInfo *info,
monitor_printf(mon, "\nImages:\n");
image_info = inserted->image;
while (1) {
- bdrv_image_info_dump(image_info);
+ bdrv_node_info_dump(qapi_ImageInfo_base(image_info));
if (image_info->has_backing_image) {
image_info = image_info->backing_image;
} else {
diff --git a/block/qapi.c b/block/qapi.c
index e5022b4481..ad88bf9b38 100644
--- a/block/qapi.c
+++ b/block/qapi.c
@@ -865,7 +865,7 @@ void bdrv_image_info_specific_dump(ImageInfoSpecific *info_spec,
visit_free(v);
}
-void bdrv_image_info_dump(ImageInfo *info)
+void bdrv_node_info_dump(BlockNodeInfo *info)
{
char *size_buf, *dsize_buf;
if (!info->has_actual_size) {
diff --git a/include/block/qapi.h b/include/block/qapi.h
index c7de4e3fa9..22198dcd0c 100644
--- a/include/block/qapi.h
+++ b/include/block/qapi.h
@@ -45,5 +45,5 @@ void bdrv_query_image_info(BlockDriverState *bs,
void bdrv_snapshot_dump(QEMUSnapshotInfo *sn);
void bdrv_image_info_specific_dump(ImageInfoSpecific *info_spec,
const char *prefix);
-void bdrv_image_info_dump(ImageInfo *info);
+void bdrv_node_info_dump(BlockNodeInfo *info);
#endif
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 7720da0498..4cf2deeb6c 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -5796,9 +5796,9 @@
##
# @DummyBlockCoreForceArrays:
#
-# Not used by QMP; hack to let us use ImageInfoList internally
+# Not used by QMP; hack to let us use BlockNodeInfoList internally
#
# Since: 8.0
##
{ 'struct': 'DummyBlockCoreForceArrays',
- 'data': { 'unused-image-info': ['ImageInfo'] } }
+ 'data': { 'unused-block-node-info': ['BlockNodeInfo'] } }
diff --git a/qemu-img.c b/qemu-img.c
index 2f85bb7ede..3b2ca3bbcb 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -2816,13 +2816,13 @@ static void dump_snapshots(BlockDriverState *bs)
g_free(sn_tab);
}
-static void dump_json_image_info_list(ImageInfoList *list)
+static void dump_json_block_node_info_list(BlockNodeInfoList *list)
{
GString *str;
QObject *obj;
Visitor *v = qobject_output_visitor_new(&obj);
- visit_type_ImageInfoList(v, NULL, &list, &error_abort);
+ visit_type_BlockNodeInfoList(v, NULL, &list, &error_abort);
visit_complete(v, &obj);
str = qobject_to_json_pretty(obj, true);
assert(str != NULL);
@@ -2832,13 +2832,13 @@ static void dump_json_image_info_list(ImageInfoList *list)
g_string_free(str, true);
}
-static void dump_json_image_info(ImageInfo *info)
+static void dump_json_block_node_info(BlockNodeInfo *info)
{
GString *str;
QObject *obj;
Visitor *v = qobject_output_visitor_new(&obj);
- visit_type_ImageInfo(v, NULL, &info, &error_abort);
+ visit_type_BlockNodeInfo(v, NULL, &info, &error_abort);
visit_complete(v, &obj);
str = qobject_to_json_pretty(obj, true);
assert(str != NULL);
@@ -2848,9 +2848,9 @@ static void dump_json_image_info(ImageInfo *info)
g_string_free(str, true);
}
-static void dump_human_image_info_list(ImageInfoList *list)
+static void dump_human_image_info_list(BlockNodeInfoList *list)
{
- ImageInfoList *elem;
+ BlockNodeInfoList *elem;
bool delim = false;
for (elem = list; elem; elem = elem->next) {
@@ -2859,7 +2859,7 @@ static void dump_human_image_info_list(ImageInfoList *list)
}
delim = true;
- bdrv_image_info_dump(elem->value);
+ bdrv_node_info_dump(elem->value);
}
}
@@ -2869,24 +2869,24 @@ static gboolean str_equal_func(gconstpointer a, gconstpointer b)
}
/**
- * Open an image file chain and return an ImageInfoList
+ * Open an image file chain and return an BlockNodeInfoList
*
* @filename: topmost image filename
* @fmt: topmost image format (may be NULL to autodetect)
* @chain: true - enumerate entire backing file chain
* false - only topmost image file
*
- * Returns a list of ImageInfo objects or NULL if there was an error opening an
- * image file. If there was an error a message will have been printed to
- * stderr.
+ * Returns a list of BlockNodeInfo objects or NULL if there was an error
+ * opening an image file. If there was an error a message will have been
+ * printed to stderr.
*/
-static ImageInfoList *collect_image_info_list(bool image_opts,
- const char *filename,
- const char *fmt,
- bool chain, bool force_share)
+static BlockNodeInfoList *collect_image_info_list(bool image_opts,
+ const char *filename,
+ const char *fmt,
+ bool chain, bool force_share)
{
- ImageInfoList *head = NULL;
- ImageInfoList **tail = &head;
+ BlockNodeInfoList *head = NULL;
+ BlockNodeInfoList **tail = &head;
GHashTable *filenames;
Error *err = NULL;
@@ -2895,7 +2895,7 @@ static ImageInfoList *collect_image_info_list(bool image_opts,
while (filename) {
BlockBackend *blk;
BlockDriverState *bs;
- ImageInfo *info;
+ BlockNodeInfo *info;
if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) {
error_report("Backing file '%s' creates an infinite loop.",
@@ -2912,7 +2912,7 @@ static ImageInfoList *collect_image_info_list(bool image_opts,
}
bs = blk_bs(blk);
- bdrv_query_image_info(bs, &info, &err);
+ bdrv_query_block_node_info(bs, &info, &err);
if (err) {
error_report_err(err);
blk_unref(blk);
@@ -2945,7 +2945,7 @@ static ImageInfoList *collect_image_info_list(bool image_opts,
return head;
err:
- qapi_free_ImageInfoList(head);
+ qapi_free_BlockNodeInfoList(head);
g_hash_table_destroy(filenames);
return NULL;
}
@@ -2956,7 +2956,7 @@ static int img_info(int argc, char **argv)
OutputFormat output_format = OFORMAT_HUMAN;
bool chain = false;
const char *filename, *fmt, *output;
- ImageInfoList *list;
+ BlockNodeInfoList *list;
bool image_opts = false;
bool force_share = false;
@@ -3035,14 +3035,14 @@ static int img_info(int argc, char **argv)
break;
case OFORMAT_JSON:
if (chain) {
- dump_json_image_info_list(list);
+ dump_json_block_node_info_list(list);
} else {
- dump_json_image_info(list->value);
+ dump_json_block_node_info(list->value);
}
break;
}
- qapi_free_ImageInfoList(list);
+ qapi_free_BlockNodeInfoList(list);
return 0;
}
--
2.31.1
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