Replace usage of legacy field info_str of NetClientState for backend
network devices with QAPI NetdevInfo stored_config that already used
in QMP query-netdev.
This change increases the detail of the "info network" output and takes
a more general approach to composing the output.
NIC and hubports still use legacy info_str field.
Signed-off-by: Alexey Kirillov <lekir...@yandex-team.ru>
---
include/qapi/hmp-output-visitor.h | 30 +++++
net/net.c | 31 ++++-
qapi/hmp-output-visitor.c | 193 ++++++++++++++++++++++++++++++
qapi/meson.build | 1 +
4 files changed, 254 insertions(+), 1 deletion(-)
create mode 100644 include/qapi/hmp-output-visitor.h
create mode 100644 qapi/hmp-output-visitor.c
diff --git a/include/qapi/hmp-output-visitor.h
b/include/qapi/hmp-output-visitor.h
new file mode 100644
index 0000000000..541e4002e3
--- /dev/null
+++ b/include/qapi/hmp-output-visitor.h
@@ -0,0 +1,30 @@
+/*
+ * HMP string output Visitor
+ *
+ * Copyright Yandex N.V., 2021
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef HMP_OUTPUT_VISITOR_H
+#define HMP_OUTPUT_VISITOR_H
+
+#include "qapi/visitor.h"
+
+typedef struct HMPOutputVisitor HMPOutputVisitor;
+
+/**
+ * Create a HMP string output visitor for @obj
+ *
+ * Flattens dicts/structures, only shows arrays borders.
+ *
+ * Errors are not expected to happen.
+ *
+ * The caller is responsible for freeing the visitor with
+ * visit_free().
+ */
+Visitor *hmp_output_visitor_new(char **result);
+
+#endif
diff --git a/net/net.c b/net/net.c
index 88d70d0e4d..e186b44e9a 100644
--- a/net/net.c
+++ b/net/net.c
@@ -54,6 +54,7 @@
#include "sysemu/sysemu.h"
#include "net/filter.h"
#include "qapi/string-output-visitor.h"
+#include "qapi/hmp-output-visitor.h"
/* Net bridge is currently not supported for W32. */
#if !defined(_WIN32)
@@ -1192,14 +1193,42 @@ static void netfilter_print_info(Monitor *mon,
NetFilterState *nf)
monitor_printf(mon, "\n");
}
+static char *generate_info_str(NetClientState *nc)
+{
+ NetdevInfo *ni = nc->stored_config;
+ char *ret_out = NULL;
+ Visitor *v;
+
+ /* Use legacy field info_str for NIC and hubports */
+ if ((nc->info->type == NET_CLIENT_DRIVER_NIC) ||
+ (nc->info->type == NET_CLIENT_DRIVER_HUBPORT)) {
+ return g_strdup(nc->info_str ? nc->info_str : "");
+ }
+
+ if (!ni) {
+ return g_malloc0(1);
+ }
+
+ v = hmp_output_visitor_new(&ret_out);
+ if (visit_type_NetdevInfo(v, "", &ni, NULL)) {
+ visit_complete(v, &ret_out);
+ }
+ visit_free(v);
+
+ return ret_out;
+}
+
void print_net_client(Monitor *mon, NetClientState *nc)
{
NetFilterState *nf;
+ char *info_str = generate_info_str(nc);
monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name,
nc->queue_index,
NetClientDriver_str(nc->info->type),
- nc->info_str ? nc->info_str : "");
+ info_str);
+ g_free(info_str);
+
if (!QTAILQ_EMPTY(&nc->filters)) {
monitor_printf(mon, "filters:\n");
}
diff --git a/qapi/hmp-output-visitor.c b/qapi/hmp-output-visitor.c
new file mode 100644
index 0000000000..8036605f97
--- /dev/null
+++ b/qapi/hmp-output-visitor.c
@@ -0,0 +1,193 @@
+/*
+ * HMP string output Visitor
+ *
+ * Copyright Yandex N.V., 2021
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/cutils.h"
+#include "qapi/hmp-output-visitor.h"
+#include "qapi/visitor-impl.h"
+
+struct HMPOutputVisitor {
+ Visitor visitor;
+ char **result;
+ GString *buffer;
+ bool is_continue;
+};
+
+static HMPOutputVisitor *to_hov(Visitor *v)
+{
+ return container_of(v, HMPOutputVisitor, visitor);
+}
+
+static void hmp_output_append_formatted(Visitor *v, const char *fmt, ...)
+{
+ HMPOutputVisitor *ov = to_hov(v);
+ va_list args;
+
+ if (ov->is_continue) {
+ g_string_append(ov->buffer, ",");
+ } else {
+ ov->is_continue = true;
+ }
+
+ va_start(args, fmt);
+ g_string_append_vprintf(ov->buffer, fmt, args);
+ va_end(args);
+}
+
+static void hmp_output_skip_comma(Visitor *v)
+{
+ HMPOutputVisitor *ov = to_hov(v);
+
+ ov->is_continue = false;
+}
+
+static bool hmp_output_start_struct(Visitor *v, const char *name,
+ void **obj, size_t unused, Error **errp)
+{
+ return true;
+}
+
+static void hmp_output_end_struct(Visitor *v, void **obj) {}
+
+static bool hmp_output_start_list(Visitor *v, const char *name,
+ GenericList **listp, size_t size,
+ Error **errp)
+{
+ hmp_output_append_formatted(v, "%s=[", name);
+ /* First element in array without comma before it */
+ hmp_output_skip_comma(v);
+
+ return true;
+}
+
+static GenericList *hmp_output_next_list(Visitor *v, GenericList *tail,
+ size_t size)
+{
+ return tail->next;
+}
+
+static void hmp_output_end_list(Visitor *v, void **obj)
+{
+ /* Don't need comma after last array element */
+ hmp_output_skip_comma(v);
+ hmp_output_append_formatted(v, "]");
+}
+
+static bool hmp_output_type_int64(Visitor *v, const char *name,
+ int64_t *obj, Error **errp)
+{
+ hmp_output_append_formatted(v, "%s=%" PRId64, name, *obj);
+
+ return true;
+}
+
+static bool hmp_output_type_uint64(Visitor *v, const char *name,
+ uint64_t *obj, Error **errp)
+{
+ hmp_output_append_formatted(v, "%s=%" PRIu64, name, *obj);
+
+ return true;
+}
+
+static bool hmp_output_type_bool(Visitor *v, const char *name, bool *obj,
+ Error **errp)
+{
+ hmp_output_append_formatted(v, "%s=%s", name, *obj ? "true" : "false");
+
+ return true;
+}
+
+static bool hmp_output_type_str(Visitor *v, const char *name, char **obj,
+ Error **errp)
+{
+ /* Skip already printed or unused fields */
+ if (!*obj || g_str_equal(name, "id") || g_str_equal(name, "type")) {
+ return true;
+ }
+
+ /* Do not print stub name for StringList elements */
+ if (g_str_equal(name, "str")) {
+ hmp_output_append_formatted(v, "%s", *obj);
+ } else {
+ hmp_output_append_formatted(v, "%s=%s", name, *obj);
+ }
+
+ return true;
+}
+
+static bool hmp_output_type_number(Visitor *v, const char *name,
+ double *obj, Error **errp)
+{
+ hmp_output_append_formatted(v, "%s=%.17g", name, *obj);
+
+ return true;
+}
+
+/* TODO: remove this function? */
+static bool hmp_output_type_any(Visitor *v, const char *name,
+ QObject **obj, Error **errp)
+{
+ return true;
+}
+
+static bool hmp_output_type_null(Visitor *v, const char *name,
+ QNull **obj, Error **errp)
+{
+ hmp_output_append_formatted(v, "%s=NULL", name);
+
+ return true;
+}
+
+static void hmp_output_complete(Visitor *v, void *opaque)
+{
+ HMPOutputVisitor *ov = to_hov(v);
+
+ *ov->result = g_string_free(ov->buffer, false);
+ ov->buffer = NULL;
+}
+
+static void hmp_output_free(Visitor *v)
+{
+ HMPOutputVisitor *ov = to_hov(v);
+
+ if (ov->buffer) {
+ g_string_free(ov->buffer, true);
+ }
+ g_free(v);
+}
+
+Visitor *hmp_output_visitor_new(char **result)
+{
+ HMPOutputVisitor *v;
+
+ v = g_malloc0(sizeof(*v));
+
+ v->visitor.type = VISITOR_OUTPUT;
+ v->visitor.start_struct = hmp_output_start_struct;
+ v->visitor.end_struct = hmp_output_end_struct;
+ v->visitor.start_list = hmp_output_start_list;
+ v->visitor.next_list = hmp_output_next_list;
+ v->visitor.end_list = hmp_output_end_list;
+ v->visitor.type_int64 = hmp_output_type_int64;
+ v->visitor.type_uint64 = hmp_output_type_uint64;
+ v->visitor.type_bool = hmp_output_type_bool;
+ v->visitor.type_str = hmp_output_type_str;
+ v->visitor.type_number = hmp_output_type_number;
+ v->visitor.type_any = hmp_output_type_any;
+ v->visitor.type_null = hmp_output_type_null;
+ v->visitor.complete = hmp_output_complete;
+ v->visitor.free = hmp_output_free;
+
+ v->result = result;
+ v->buffer = g_string_new("");
+ v->is_continue = false;
+
+ return &v->visitor;
+}
diff --git a/qapi/meson.build b/qapi/meson.build
index 0652569bc4..94effbc052 100644
--- a/qapi/meson.build
+++ b/qapi/meson.build
@@ -8,6 +8,7 @@ util_ss.add(files(
'qobject-output-visitor.c',
'string-input-visitor.c',
'string-output-visitor.c',
+ 'hmp-output-visitor.c',
))
if have_system or have_tools
util_ss.add(files(
--
2.25.1
