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[Qemu-devel] [RFC][PATCH v6 11/23] virtagent: add agent_viewdmesg qmp/hm
From: |
Michael Roth |
Subject: |
[Qemu-devel] [RFC][PATCH v6 11/23] virtagent: add agent_viewdmesg qmp/hmp commands |
Date: |
Mon, 17 Jan 2011 07:15:05 -0600 |
Add commands to view guest dmesg output. Currently it is a 16K buffer.
Signed-off-by: Michael Roth <address@hidden>
---
hmp-commands.hx | 16 +++++++++
qmp-commands.hx | 35 +++++++++++++++++++++
virtagent.c | 92 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
virtagent.h | 3 ++
4 files changed, 146 insertions(+), 0 deletions(-)
diff --git a/hmp-commands.hx b/hmp-commands.hx
index a3e5e27..f60c64f 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -1344,6 +1344,22 @@ STEXI
Echo the file identified by @var{filepath} on the guest filesystem
ETEXI
+ {
+ .name = "agent_viewdmesg",
+ .args_type = "",
+ .params = "",
+ .help = "View guest dmesg output",
+ .user_print = do_agent_viewdmesg_print,
+ .mhandler.cmd_async = do_agent_viewdmesg,
+ .flags = MONITOR_CMD_ASYNC,
+ },
+
+STEXI
address@hidden agent_viewdmesg
address@hidden agent_viewdmesg
+View guest dmesg output
+ETEXI
+
STEXI
@end table
ETEXI
diff --git a/qmp-commands.hx b/qmp-commands.hx
index 9dca7b9..0db38bd 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -828,6 +828,41 @@ Example:
EQMP
{
+ .name = "agent_viewdmesg",
+ .args_type = "",
+ .params = "",
+ .help = "View guest dmesg output",
+ .user_print = do_agent_viewdmesg_print,
+ .mhandler.cmd_async = do_agent_viewdmesg,
+ .flags = MONITOR_CMD_ASYNC,
+ },
+
+STEXI
address@hidden agent_viewdmesg
address@hidden agent_viewdmesg
+View guest dmesg output
+ETEXI
+SQMP
+agent_viewdmesg
+--------
+
+View guest dmesg output
+
+Arguments:
+
+(none)
+
+Example:
+
+-> { "execute": "agent_viewdmesg" }
+<- { "return": {
+ "contents": "[353487.942215] usb 1-4: USB disconnect, address 9\n..."
+ }
+ }
+
+EQMP
+
+ {
.name = "qmp_capabilities",
.args_type = "",
.params = "",
diff --git a/virtagent.c b/virtagent.c
index cd5caf1..0976afe 100644
--- a/virtagent.c
+++ b/virtagent.c
@@ -252,3 +252,95 @@ int do_agent_viewfile(Monitor *mon, const QDict
*mon_params,
xmlrpc_DECREF(params);
return ret;
}
+
+void do_agent_viewdmesg_print(Monitor *mon, const QObject *data)
+{
+ QDict *qdict;
+ const char *contents = NULL;
+ int i;
+
+ qdict = qobject_to_qdict(data);
+ if (!qdict_haskey(qdict, "contents")) {
+ goto out;
+ }
+
+ contents = qdict_get_str(qdict, "contents");
+ if (contents != NULL) {
+ /* monitor_printf truncates so do it in chunks. also, file_contents
+ * may not be null-termed at proper location so explicitly calc
+ * last chunk sizes */
+ for (i = 0; i < strlen(contents); i += 1024) {
+ monitor_printf(mon, "%.1024s", contents + i);
+ }
+ }
+
+out:
+ monitor_printf(mon, "\n");
+}
+
+static void do_agent_viewdmesg_cb(const char *resp_data,
+ size_t resp_data_len,
+ MonitorCompletion *mon_cb,
+ void *mon_data)
+{
+ xmlrpc_value *resp = NULL;
+ char *dmesg = NULL;
+ int ret;
+ xmlrpc_env env;
+ QDict *qdict = qdict_new();
+
+ if (resp_data == NULL) {
+ LOG("error handling RPC request");
+ goto out_no_resp;
+ }
+
+ xmlrpc_env_init(&env);
+ resp = xmlrpc_parse_response(&env, resp_data, resp_data_len);
+ if (va_rpc_has_error(&env)) {
+ ret = -1;
+ goto out_no_resp;
+ }
+
+ xmlrpc_parse_value(&env, resp, "s", &dmesg);
+ if (va_rpc_has_error(&env)) {
+ ret = -1;
+ goto out;
+ }
+
+ if (dmesg != NULL) {
+ qdict_put(qdict, "contents", qstring_from_str(dmesg));
+ }
+
+out:
+ xmlrpc_DECREF(resp);
+out_no_resp:
+ if (mon_cb) {
+ mon_cb(mon_data, QOBJECT(qdict));
+ }
+}
+
+/*
+ * do_agent_viewdmesg(): View guest dmesg output
+ */
+int do_agent_viewdmesg(Monitor *mon, const QDict *mon_params,
+ MonitorCompletion cb, void *opaque)
+{
+ xmlrpc_env env;
+ xmlrpc_value *params;
+ int ret;
+
+ xmlrpc_env_init(&env);
+
+ params = xmlrpc_build_value(&env, "()");
+ if (va_rpc_has_error(&env)) {
+ return -1;
+ }
+
+ ret = va_do_rpc(&env, "va.getdmesg", params, do_agent_viewdmesg_cb, cb,
+ opaque);
+ if (ret) {
+ qerror_report(QERR_VA_FAILED, ret, strerror(ret));
+ }
+ xmlrpc_DECREF(params);
+ return ret;
+}
diff --git a/virtagent.h b/virtagent.h
index 1bd7595..b67abc3 100644
--- a/virtagent.h
+++ b/virtagent.h
@@ -33,5 +33,8 @@ int va_client_close(void);
void do_agent_viewfile_print(Monitor *mon, const QObject *qobject);
int do_agent_viewfile(Monitor *mon, const QDict *mon_params,
MonitorCompletion cb, void *opaque);
+void do_agent_viewdmesg_print(Monitor *mon, const QObject *qobject);
+int do_agent_viewdmesg(Monitor *mon, const QDict *mon_params,
+ MonitorCompletion cb, void *opaque);
#endif /* VIRTAGENT_H */
--
1.7.0.4
- [Qemu-devel] [RFC][PATCH v6 05/23] virtagent: transport definitions read/send callback functions, (continued)
[Qemu-devel] [RFC][PATCH v6 12/23] virtagent: add va.shutdown RPC, Michael Roth, 2011/01/17
[Qemu-devel] [RFC][PATCH v6 11/23] virtagent: add agent_viewdmesg qmp/hmp commands,
Michael Roth <=
[Qemu-devel] [RFC][PATCH v6 08/23] virtagent: add va.getfile RPC, Michael Roth, 2011/01/17
- [Qemu-devel] Re: [RFC][PATCH v6 08/23] virtagent: add va.getfile RPC, Jes Sorensen, 2011/01/21
- Re: [Qemu-devel] Re: [RFC][PATCH v6 08/23] virtagent: add va.getfile RPC, Daniel P. Berrange, 2011/01/21
- Re: [Qemu-devel] Re: [RFC][PATCH v6 08/23] virtagent: add va.getfile RPC, Michael Roth, 2011/01/21
- Re: [Qemu-devel] Re: [RFC][PATCH v6 08/23] virtagent: add va.getfile RPC, Richard W.M. Jones, 2011/01/24
- Re: [Qemu-devel] Re: [RFC][PATCH v6 08/23] virtagent: add va.getfile RPC, Richard W.M. Jones, 2011/01/24
- Re: [Qemu-devel] Re: [RFC][PATCH v6 08/23] virtagent: add va.getfile RPC, Anthony Liguori, 2011/01/24
- Re: [Qemu-devel] Re: [RFC][PATCH v6 08/23] virtagent: add va.getfile RPC, Richard W.M. Jones, 2011/01/24
- Re: [Qemu-devel] Re: [RFC][PATCH v6 08/23] virtagent: add va.getfile RPC, Anthony Liguori, 2011/01/24
- Re: [Qemu-devel] Re: [RFC][PATCH v6 08/23] virtagent: add va.getfile RPC, Michael Roth, 2011/01/24