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[Qemu-devel] [PATCH 01/12] migration: Introduce announce parameters
From: |
Vladislav Yasevich |
Subject: |
[Qemu-devel] [PATCH 01/12] migration: Introduce announce parameters |
Date: |
Wed, 24 May 2017 14:05:17 -0400 |
Add parameters that control RARP/GARP announcement timeouts.
The parameters structure is added to the QAPI and a qmp command
is added to set/get the parameter data.
Based on work by "Dr. David Alan Gilbert" <address@hidden>
Signed-off-by: Vladislav Yasevich <address@hidden>
---
include/sysemu/sysemu.h | 7 ++++
migration/savevm.c | 98 +++++++++++++++++++++++++++++++++++++++++++++++++
qapi-schema.json | 84 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 189 insertions(+)
diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index 83c1ceb..7fd49c4 100644
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -78,6 +78,13 @@ void qemu_remove_machine_init_done_notifier(Notifier
*notify);
int save_vmstate(const char *name, Error **errp);
int load_vmstate(const char *name, Error **errp);
+AnnounceParameters *qemu_get_announce_params(void);
+void qemu_fill_announce_parameters(AnnounceParameters **to,
+ AnnounceParameters *from);
+bool qemu_validate_announce_parameters(AnnounceParameters *params,
+ Error **errp);
+void qemu_set_announce_parameters(AnnounceParameters *announce_params,
+ AnnounceParameters *params);
void qemu_announce_self(void);
/* Subcommands for QEMU_VM_COMMAND */
diff --git a/migration/savevm.c b/migration/savevm.c
index f5e8194..cee2837 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -78,6 +78,104 @@ static struct mig_cmd_args {
[MIG_CMD_MAX] = { .len = -1, .name = "MAX" },
};
+#define QEMU_ANNOUNCE_INITIAL 50
+#define QEMU_ANNOUNCE_MAX 550
+#define QEMU_ANNOUNCE_ROUNDS 5
+#define QEMU_ANNOUNCE_STEP 100
+
+AnnounceParameters *qemu_get_announce_params(void)
+{
+ static AnnounceParameters announce = {
+ .initial = QEMU_ANNOUNCE_INITIAL,
+ .max = QEMU_ANNOUNCE_MAX,
+ .rounds = QEMU_ANNOUNCE_ROUNDS,
+ .step = QEMU_ANNOUNCE_STEP,
+ };
+
+ return &announce;
+}
+
+void qemu_fill_announce_parameters(AnnounceParameters **to,
+ AnnounceParameters *from)
+{
+ AnnounceParameters *params;
+
+ params = *to = g_malloc0(sizeof(*params));
+ params->has_initial = true;
+ params->initial = from->initial;
+ params->has_max = true;
+ params->max = from->max;
+ params->has_rounds = true;
+ params->rounds = from->rounds;
+ params->has_step = true;
+ params->step = from->step;
+}
+
+bool qemu_validate_announce_parameters(AnnounceParameters *params, Error
**errp)
+{
+ if (params->has_initial &&
+ (params->initial < 1 || params->initial > 100000)) {
+ error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "initial",
+ "is invalid, it should be in the range of 1 to 100000 ms");
+ return false;
+ }
+ if (params->has_max &&
+ (params->max < 1 || params->max > 100000)) {
+ error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "max",
+ "is invalid, it should be in the range of 1 to 100000 ms");
+ return false;
+ }
+ if (params->has_rounds &&
+ (params->rounds < 1 || params->rounds > 1000)) {
+ error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "rounds",
+ "is invalid, it should be in the range of 1 to 1000");
+ return false;
+ }
+ if (params->has_step &&
+ (params->step < 0 || params->step > 10000)) {
+ error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "step",
+ "is invalid, it should be in the range of 1 to 10000 ms");
+ return false;
+ }
+
+ return true;
+}
+
+void qemu_set_announce_parameters(AnnounceParameters *announce_params,
+ AnnounceParameters *params)
+{
+ if (params->has_initial) {
+ announce_params->initial = params->initial;
+ }
+ if (params->has_max) {
+ announce_params->max = params->max;
+ }
+ if (params->has_rounds) {
+ announce_params->rounds = params->rounds;
+ }
+ if (params->has_step) {
+ announce_params->step = params->step;
+ }
+}
+
+AnnounceParameters *qmp_query_announce_parameters(Error **errp)
+{
+ AnnounceParameters *params = NULL;
+
+ qemu_fill_announce_parameters(¶ms, qemu_get_announce_params());
+ return params;
+}
+
+void qmp_announce_set_parameters(AnnounceParameters *params, Error **errp)
+{
+ AnnounceParameters *current = qemu_get_announce_params();
+
+ if (!qemu_validate_announce_parameters(params, errp))
+ return;
+
+ qemu_set_announce_parameters(current, params);
+}
+
static int announce_self_create(uint8_t *buf,
uint8_t *mac_addr)
{
diff --git a/qapi-schema.json b/qapi-schema.json
index 80603cf..2030087 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -569,6 +569,90 @@
##
{ 'command': 'query-events', 'returns': ['EventInfo'] }
+
+##
+# @AnnounceParameter:
+#
+# @AnnounceParameter enumeration
+#
+# @initial: Initial delay (in ms) before sending the first GARP/RARP
+# announcement
+#
+# @max: Maximum delay (in ms) to between GARP/RARP announcemnt packets
+#
+# @rounds: Number of self-announcement attempts
+#
+# @step: Delay increate (in ms) after each self-announcment attempt
+#
+# Since: 2.10
+##
+{ 'enum' : 'AnnounceParameter',
+ 'data' : [ 'initial', 'max', 'rounds', 'step' ] }
+
+##
+# @AnnounceParameters:
+#
+# Optional members may be omited on input, but all values will be present
+# on output.
+#
+# @initial: Initial delay (in ms) before sending the first GARP/RARP
+# announcement
+#
+# @max: Maximum delay (in ms) to between GARP/RARP announcemnt packets
+#
+# @rounds: Number of self-announcement attempts
+#
+# @step: Delay increate (in ms) after each self-announcment attempt
+#
+# Since: 2.10
+##
+
+{ 'struct': 'AnnounceParameters',
+ 'data': { '*initial': 'int',
+ '*max': 'int',
+ '*rounds': 'int',
+ '*step': 'int' } }
+
+##
+# @announce-set-parameters:
+#
+# Set qemu announce parameters.
+#
+# Since: 2.10
+#
+# Example:
+#
+# -> { "execute": "announce-set-parameters",
+# "arguments": { "announce-rounds": 10 } }
+#
+##
+{ 'command': 'announce-set-parameters', 'boxed': true,
+ 'data': 'AnnounceParameters' }
+
+##
+# @query-announce-parameters:
+#
+# Returns information about the current announce parameters
+#
+# Returns: @AnnounceParameters
+#
+# Since: 2.10
+#
+# Example:
+#
+# -> { "execute": "query-announce-parameters" }
+# <- { "return": {
+# "initial": 50,
+# "max": 500,
+# "rounds": 5,
+# "step": 100
+# }
+# }
+#
+##
+{ 'command': 'query-announce-parameters',
+ 'returns': 'AnnounceParameters' }
+
##
# @MigrationStats:
#
--
2.7.4