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198 lines
7.6 KiB
198 lines
7.6 KiB
From b1970c733dc46b2a8f648997a7e1c5d12900ff54 Mon Sep 17 00:00:00 2001
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From: Hanna Reitz <hreitz@redhat.com>
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Date: Mon, 20 Jun 2022 18:27:04 +0200
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Subject: [PATCH 17/20] qemu-img: Change info key names for protocol nodes
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RH-Author: Hanna Czenczek <hreitz@redhat.com>
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RH-MergeRequest: 145: Show protocol-level information in qemu-img info
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RH-Bugzilla: 1860292
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RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
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RH-Commit: [12/12] 67c260aaa05466410503fecee6210bf9d47e8c7c (hreitz/qemu-kvm-c-9-s)
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Currently, when querying a qcow2 image, qemu-img info reports something
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like this:
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image: test.qcow2
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file format: qcow2
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virtual size: 64 MiB (67108864 bytes)
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disk size: 196 KiB
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cluster_size: 65536
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Format specific information:
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compat: 1.1
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compression type: zlib
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lazy refcounts: false
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refcount bits: 16
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corrupt: false
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extended l2: false
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Child node '/file':
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image: test.qcow2
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file format: file
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virtual size: 192 KiB (197120 bytes)
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disk size: 196 KiB
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Format specific information:
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extent size hint: 1048576
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Notably, the way the keys are named is specific for image files: The
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filename is shown under "image", the BDS driver under "file format", and
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the BDS length under "virtual size". This does not make much sense for
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nodes that are not actually supposed to be guest images, like the /file
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child node shown above.
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Give bdrv_node_info_dump() a @protocol parameter that gives a hint that
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the respective node is probably just used for data storage and does not
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necessarily present the data for a VM guest disk. This renames the keys
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so that with this patch, the output becomes:
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image: test.qcow2
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[...]
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Child node '/file':
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filename: test.qcow2
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protocol type: file
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file length: 192 KiB (197120 bytes)
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disk size: 196 KiB
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Format specific information:
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extent size hint: 1048576
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(Perhaps we should also rename "Format specific information", but I
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could not come up with anything better that will not become problematic
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if we guess wrong with the protocol "heuristic".)
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This change affects iotest 302, which has protocol node information in
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its reference output.
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Signed-off-by: Hanna Reitz <hreitz@redhat.com>
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Message-Id: <20220620162704.80987-13-hreitz@redhat.com>
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Reviewed-by: Kevin Wolf <kwolf@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit d570177b50c389f379f93183155a27d44856ab46)
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Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
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---
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block/monitor/block-hmp-cmds.c | 2 +-
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block/qapi.c | 39 ++++++++++++++++++++++++++++------
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include/block/qapi.h | 2 +-
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qemu-img.c | 3 ++-
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tests/qemu-iotests/302.out | 6 +++---
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5 files changed, 39 insertions(+), 13 deletions(-)
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diff --git a/block/monitor/block-hmp-cmds.c b/block/monitor/block-hmp-cmds.c
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index 72824d4e2e..4d83339a5d 100644
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--- a/block/monitor/block-hmp-cmds.c
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+++ b/block/monitor/block-hmp-cmds.c
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@@ -734,7 +734,7 @@ static void print_block_info(Monitor *mon, BlockInfo *info,
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monitor_printf(mon, "\nImages:\n");
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image_info = inserted->image;
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while (1) {
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- bdrv_node_info_dump(qapi_ImageInfo_base(image_info), 0);
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+ bdrv_node_info_dump(qapi_ImageInfo_base(image_info), 0, false);
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if (image_info->has_backing_image) {
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image_info = image_info->backing_image;
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} else {
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diff --git a/block/qapi.c b/block/qapi.c
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index 3e35603f0c..56f398c500 100644
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--- a/block/qapi.c
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+++ b/block/qapi.c
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@@ -934,24 +934,49 @@ void bdrv_image_info_specific_dump(ImageInfoSpecific *info_spec,
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visit_free(v);
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}
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-void bdrv_node_info_dump(BlockNodeInfo *info, int indentation)
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+/**
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+ * Print the given @info object in human-readable form. Every field is indented
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+ * using the given @indentation (four spaces per indentation level).
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+ *
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+ * When using this to print a whole block graph, @protocol can be set to true to
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+ * signify that the given information is associated with a protocol node, i.e.
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+ * just data storage for an image, such that the data it presents is not really
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+ * a full VM disk. If so, several fields change name: For example, "virtual
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+ * size" is printed as "file length".
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+ * (Consider a qcow2 image, which is represented by a qcow2 node and a file
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+ * node. Printing a "virtual size" for the file node does not make sense,
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+ * because without the qcow2 node, it is not really a guest disk, so it does not
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+ * have a "virtual size". Therefore, we call it "file length" instead.)
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+ *
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+ * @protocol is ignored when @indentation is 0, because we take that to mean
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+ * that the associated node is the root node in the queried block graph, and
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+ * thus is always to be interpreted as a standalone guest disk.
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+ */
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+void bdrv_node_info_dump(BlockNodeInfo *info, int indentation, bool protocol)
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{
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char *size_buf, *dsize_buf;
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g_autofree char *ind_s = g_strdup_printf("%*s", indentation * 4, "");
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+ if (indentation == 0) {
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+ /* Top level, consider this a normal image */
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+ protocol = false;
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+ }
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+
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if (!info->has_actual_size) {
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dsize_buf = g_strdup("unavailable");
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} else {
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dsize_buf = size_to_str(info->actual_size);
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}
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size_buf = size_to_str(info->virtual_size);
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- qemu_printf("%simage: %s\n"
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- "%sfile format: %s\n"
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- "%svirtual size: %s (%" PRId64 " bytes)\n"
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+ qemu_printf("%s%s: %s\n"
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+ "%s%s: %s\n"
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+ "%s%s: %s (%" PRId64 " bytes)\n"
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"%sdisk size: %s\n",
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- ind_s, info->filename,
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- ind_s, info->format,
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- ind_s, size_buf, info->virtual_size,
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+ ind_s, protocol ? "filename" : "image", info->filename,
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+ ind_s, protocol ? "protocol type" : "file format",
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+ info->format,
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+ ind_s, protocol ? "file length" : "virtual size",
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+ size_buf, info->virtual_size,
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ind_s, dsize_buf);
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g_free(size_buf);
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g_free(dsize_buf);
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diff --git a/include/block/qapi.h b/include/block/qapi.h
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index 38855f2ae9..26113da21a 100644
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--- a/include/block/qapi.h
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+++ b/include/block/qapi.h
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@@ -51,5 +51,5 @@ void bdrv_snapshot_dump(QEMUSnapshotInfo *sn);
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void bdrv_image_info_specific_dump(ImageInfoSpecific *info_spec,
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const char *prefix,
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int indentation);
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-void bdrv_node_info_dump(BlockNodeInfo *info, int indentation);
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+void bdrv_node_info_dump(BlockNodeInfo *info, int indentation, bool protocol);
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#endif
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diff --git a/qemu-img.c b/qemu-img.c
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index e281011245..2943625c67 100644
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--- a/qemu-img.c
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+++ b/qemu-img.c
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@@ -2853,7 +2853,8 @@ static void dump_human_image_info(BlockGraphInfo *info, int indentation,
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{
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BlockChildInfoList *children_list;
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- bdrv_node_info_dump(qapi_BlockGraphInfo_base(info), indentation);
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+ bdrv_node_info_dump(qapi_BlockGraphInfo_base(info), indentation,
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+ info->children == NULL);
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for (children_list = info->children; children_list;
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children_list = children_list->next)
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diff --git a/tests/qemu-iotests/302.out b/tests/qemu-iotests/302.out
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index edfa1c4f05..7b5014cdd8 100644
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--- a/tests/qemu-iotests/302.out
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+++ b/tests/qemu-iotests/302.out
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@@ -5,9 +5,9 @@ file format: raw
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virtual size: 448 KiB (458752 bytes)
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disk size: unavailable
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Child node '/file':
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- image: nbd+unix:///exp?socket=SOCK_DIR/PID-nbd-sock
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- file format: nbd
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- virtual size: 448 KiB (458752 bytes)
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+ filename: nbd+unix:///exp?socket=SOCK_DIR/PID-nbd-sock
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+ protocol type: nbd
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+ file length: 448 KiB (458752 bytes)
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disk size: unavailable
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=== Converted image info ===
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--
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2.31.1
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