yeahuh / rpms / qemu-kvm

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From 85b14be2b92e75320728a450635c80053d8cd374 Mon Sep 17 00:00:00 2001
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From: Max Reitz <mreitz@redhat.com>
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Date: Wed, 6 Nov 2013 16:53:36 +0100
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Subject: [PATCH 79/87] block/qapi: Human-readable ImageInfoSpecific dump
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RH-Author: Max Reitz <mreitz@redhat.com>
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Message-id: <1383756824-6921-14-git-send-email-mreitz@redhat.com>
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Patchwork-id: 55568
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O-Subject: [RHEL-7.0 qemu-kvm PATCH v2 13/21] block/qapi: Human-readable ImageInfoSpecific dump
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Bugzilla: 980771
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RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
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RH-Acked-by: Fam Zheng <famz@redhat.com>
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RH-Acked-by: Jeffrey Cody <jcody@redhat.com>
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BZ: 980771
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Add a function for generically dumping the ImageInfoSpecific information
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in a human-readable format to block/qapi.c.
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Use this function in bdrv_image_info_dump and qemu-io-cmds.c:info_f to
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allow qemu-img info resp. qemu-io -c info to print that format specific
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information.
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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Reviewed-by: Eric Blake <eblake@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit a8d8ecb77fc16da49ea2c1edae267dc9d0c01dfd)
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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Conflicts:
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	qemu-io.c
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	qemu-io-cmds.c
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Conflicts because 797ac58cb2093ab9192d8998a1fef85d87cc8661 has not been
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backported, which splits qemu-io-cmds.c from qemu-io.c.
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---
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 block/qapi.c         | 121 +++++++++++++++++++++++++++++++++++++++++++++++++++
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 include/block/qapi.h |   2 +
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 qemu-io.c            |   9 ++++
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 3 files changed, 132 insertions(+)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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 block/qapi.c         |  121 ++++++++++++++++++++++++++++++++++++++++++++++++++
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 include/block/qapi.h |    2 +
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 qemu-io.c            |    9 ++++
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 3 files changed, 132 insertions(+), 0 deletions(-)
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diff --git a/block/qapi.c b/block/qapi.c
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index 896cd37..87423fb 100644
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--- a/block/qapi.c
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+++ b/block/qapi.c
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@@ -25,6 +25,9 @@
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 #include "block/qapi.h"
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 #include "block/block_int.h"
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 #include "qmp-commands.h"
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+#include "qapi-visit.h"
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+#include "qapi/qmp-output-visitor.h"
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+#include "qapi/qmp/types.h"
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 /*
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  * Returns 0 on success, with *p_list either set to describe snapshot
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@@ -400,6 +403,119 @@ void bdrv_snapshot_dump(fprintf_function func_fprintf, void *f,
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     }
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 }
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+static void dump_qdict(fprintf_function func_fprintf, void *f, int indentation,
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+                       QDict *dict);
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+static void dump_qlist(fprintf_function func_fprintf, void *f, int indentation,
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+                       QList *list);
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+
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+static void dump_qobject(fprintf_function func_fprintf, void *f,
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+                         int comp_indent, QObject *obj)
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+{
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+    switch (qobject_type(obj)) {
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+        case QTYPE_QINT: {
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+            QInt *value = qobject_to_qint(obj);
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+            func_fprintf(f, "%" PRId64, qint_get_int(value));
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+            break;
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+        }
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+        case QTYPE_QSTRING: {
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+            QString *value = qobject_to_qstring(obj);
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+            func_fprintf(f, "%s", qstring_get_str(value));
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+            break;
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+        }
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+        case QTYPE_QDICT: {
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+            QDict *value = qobject_to_qdict(obj);
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+            dump_qdict(func_fprintf, f, comp_indent, value);
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+            break;
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+        }
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+        case QTYPE_QLIST: {
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+            QList *value = qobject_to_qlist(obj);
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+            dump_qlist(func_fprintf, f, comp_indent, value);
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+            break;
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+        }
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+        case QTYPE_QFLOAT: {
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+            QFloat *value = qobject_to_qfloat(obj);
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+            func_fprintf(f, "%g", qfloat_get_double(value));
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+            break;
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+        }
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+        case QTYPE_QBOOL: {
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+            QBool *value = qobject_to_qbool(obj);
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+            func_fprintf(f, "%s", qbool_get_int(value) ? "true" : "false");
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+            break;
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+        }
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+        case QTYPE_QERROR: {
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+            QString *value = qerror_human((QError *)obj);
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+            func_fprintf(f, "%s", qstring_get_str(value));
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+            break;
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+        }
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+        case QTYPE_NONE:
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+            break;
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+        case QTYPE_MAX:
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+        default:
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+            abort();
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+    }
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+}
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+
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+static void dump_qlist(fprintf_function func_fprintf, void *f, int indentation,
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+                       QList *list)
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+{
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+    const QListEntry *entry;
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+    int i = 0;
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+
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+    for (entry = qlist_first(list); entry; entry = qlist_next(entry), i++) {
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+        qtype_code type = qobject_type(entry->value);
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+        bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
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+        const char *format = composite ? "%*s[%i]:\n" : "%*s[%i]: ";
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+
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+        func_fprintf(f, format, indentation * 4, "", i);
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+        dump_qobject(func_fprintf, f, indentation + 1, entry->value);
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+        if (!composite) {
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+            func_fprintf(f, "\n");
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+        }
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+    }
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+}
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+
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+static void dump_qdict(fprintf_function func_fprintf, void *f, int indentation,
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+                       QDict *dict)
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+{
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+    const QDictEntry *entry;
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+
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+    for (entry = qdict_first(dict); entry; entry = qdict_next(dict, entry)) {
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+        qtype_code type = qobject_type(entry->value);
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+        bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
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+        const char *format = composite ? "%*s%s:\n" : "%*s%s: ";
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+        char key[strlen(entry->key) + 1];
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+        int i;
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+
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+        /* replace dashes with spaces in key (variable) names */
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+        for (i = 0; entry->key[i]; i++) {
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+            key[i] = entry->key[i] == '-' ? ' ' : entry->key[i];
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+        }
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+        key[i] = 0;
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+
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+        func_fprintf(f, format, indentation * 4, "", key);
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+        dump_qobject(func_fprintf, f, indentation + 1, entry->value);
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+        if (!composite) {
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+            func_fprintf(f, "\n");
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+        }
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+    }
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+}
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+
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+void bdrv_image_info_specific_dump(fprintf_function func_fprintf, void *f,
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+                                   ImageInfoSpecific *info_spec)
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+{
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+    Error *local_err = NULL;
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+    QmpOutputVisitor *ov = qmp_output_visitor_new();
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+    QObject *obj, *data;
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+
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+    visit_type_ImageInfoSpecific(qmp_output_get_visitor(ov), &info_spec, NULL,
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+                                 &local_err);
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+    obj = qmp_output_get_qobject(ov);
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+    assert(qobject_type(obj) == QTYPE_QDICT);
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+    data = qdict_get(qobject_to_qdict(obj), "data");
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+    dump_qobject(func_fprintf, f, 1, data);
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+    qmp_output_visitor_cleanup(ov);
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+}
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+
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 void bdrv_image_info_dump(fprintf_function func_fprintf, void *f,
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                           ImageInfo *info)
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 {
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@@ -470,4 +586,9 @@ void bdrv_image_info_dump(fprintf_function func_fprintf, void *f,
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             func_fprintf(f, "\n");
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         }
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     }
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+
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+    if (info->has_format_specific) {
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+        func_fprintf(f, "Format specific information:\n");
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+        bdrv_image_info_specific_dump(func_fprintf, f, info->format_specific);
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+    }
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 }
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diff --git a/include/block/qapi.h b/include/block/qapi.h
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index 0496cc9..9518ee4 100644
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--- a/include/block/qapi.h
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+++ b/include/block/qapi.h
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@@ -42,6 +42,8 @@ BlockStats *bdrv_query_stats(const BlockDriverState *bs);
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 void bdrv_snapshot_dump(fprintf_function func_fprintf, void *f,
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                         QEMUSnapshotInfo *sn);
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+void bdrv_image_info_specific_dump(fprintf_function func_fprintf, void *f,
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+                                   ImageInfoSpecific *info_spec);
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 void bdrv_image_info_dump(fprintf_function func_fprintf, void *f,
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                           ImageInfo *info);
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 #endif
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diff --git a/qemu-io.c b/qemu-io.c
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index 116bb1b..df21022 100644
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--- a/qemu-io.c
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+++ b/qemu-io.c
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@@ -17,6 +17,7 @@
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 #include "qemu-common.h"
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 #include "qemu/main-loop.h"
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 #include "block/block_int.h"
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+#include "block/qapi.h"
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 #include "cmd.h"
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 #include "trace/control.h"
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@@ -1462,6 +1463,7 @@ static const cmdinfo_t length_cmd = {
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 static int info_f(int argc, char **argv)
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 {
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     BlockDriverInfo bdi;
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+    ImageInfoSpecific *spec_info;
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     char s1[64], s2[64];
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     int ret;
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@@ -1483,6 +1485,13 @@ static int info_f(int argc, char **argv)
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     printf("cluster size: %s\n", s1);
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     printf("vm state offset: %s\n", s2);
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+    spec_info = bdrv_get_specific_info(bs);
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+    if (spec_info) {
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+        printf("Format specific information:\n");
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+        bdrv_image_info_specific_dump(fprintf, stdout, spec_info);
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+        qapi_free_ImageInfoSpecific(spec_info);
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+    }
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+
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     return 0;
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 }
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-- 
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1.7.1
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