This commit implements the function qemuAgentGetHostname() that uses the
QEMU command 'guest-get-host-name' to retrieve the guest hostname of
Virtual Machine. It is a possibility where QEMU-GA is running.

Signed-off-by: Julio Faracco <jcfaracco@gmail.com>
---
 src/qemu/qemu_agent.c | 42 ++++++++++++++++++++++++++++++++++++++++++
 src/qemu/qemu_agent.h |  4 ++++
 2 files changed, 46 insertions(+)

diff --git a/src/qemu/qemu_agent.c b/src/qemu/qemu_agent.c
index bf08871f18..2d006b8070 100644
--- a/src/qemu/qemu_agent.c
+++ b/src/qemu/qemu_agent.c
@@ -1682,6 +1682,48 @@ qemuAgentUpdateCPUInfo(unsigned int nvcpus,
     return 0;
 }
 
+int
+qemuAgentGetHostname(qemuAgentPtr mon,
+                     char **hostname)
+{
+    int ret = -1;
+    virJSONValuePtr cmd;
+    virJSONValuePtr reply = NULL;
+    virJSONValuePtr data = NULL;
+
+    cmd = qemuAgentMakeCommand("guest-get-host-name",
+                               NULL);
+
+    if (!cmd)
+        return ret;
+
+    if (qemuAgentCommand(mon, cmd, &reply, true,
+                         VIR_DOMAIN_QEMU_AGENT_COMMAND_BLOCK) < 0)
+        goto cleanup;
+
+    if (qemuAgentCheckError(cmd, reply) < 0)
+        goto cleanup;
+
+    if (!(data = virJSONValueObjectGet(reply, "return"))) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("malformed return value"));
+        goto cleanup;
+    }
+
+    if (VIR_STRDUP(*hostname,
+                   virJSONValueObjectGetString(data, "host-name")) <= 0) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("'host-name' missing in reply of guest-get-host-name"));
+        goto cleanup;
+    }
+
+    ret = 0;
+
+ cleanup:
+    virJSONValueFree(cmd);
+    virJSONValueFree(reply);
+    return ret;
+}
 
 int
 qemuAgentGetTime(qemuAgentPtr mon,
diff --git a/src/qemu/qemu_agent.h b/src/qemu/qemu_agent.h
index 6dd9c702dd..4354b7e0cf 100644
--- a/src/qemu/qemu_agent.h
+++ b/src/qemu/qemu_agent.h
@@ -105,6 +105,10 @@ int qemuAgentUpdateCPUInfo(unsigned int nvcpus,
                            qemuAgentCPUInfoPtr cpuinfo,
                            int ncpuinfo);
 
+int
+qemuAgentGetHostname(qemuAgentPtr mon,
+                     char **hostname);
+
 int qemuAgentGetTime(qemuAgentPtr mon,
                      long long *seconds,
                      unsigned int *nseconds);
-- 
2.17.1

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Em seg, 20 de ago de 2018 às 23:35, Julio Faracco
<jcfaracco@gmail.com> escreveu:
>
> This commit implements the function qemuAgentGetHostname() that uses the
> QEMU command 'guest-get-host-name' to retrieve the guest hostname of
> Virtual Machine. It is a possibility where QEMU-GA is running.
>
> Signed-off-by: Julio Faracco <jcfaracco@gmail.com>
> ---
>  src/qemu/qemu_agent.c | 42 ++++++++++++++++++++++++++++++++++++++++++
>  src/qemu/qemu_agent.h |  4 ++++
>  2 files changed, 46 insertions(+)
>
> diff --git a/src/qemu/qemu_agent.c b/src/qemu/qemu_agent.c
> index bf08871f18..2d006b8070 100644
> --- a/src/qemu/qemu_agent.c
> +++ b/src/qemu/qemu_agent.c
> @@ -1682,6 +1682,48 @@ qemuAgentUpdateCPUInfo(unsigned int nvcpus,
>      return 0;
>  }
>
> +int
> +qemuAgentGetHostname(qemuAgentPtr mon,
> +                     char **hostname)
> +{
> +    int ret = -1;
> +    virJSONValuePtr cmd;
> +    virJSONValuePtr reply = NULL;
> +    virJSONValuePtr data = NULL;
> +
> +    cmd = qemuAgentMakeCommand("guest-get-host-name",
> +                               NULL);
> +
> +    if (!cmd)
> +        return ret;
> +
> +    if (qemuAgentCommand(mon, cmd, &reply, true,
> +                         VIR_DOMAIN_QEMU_AGENT_COMMAND_BLOCK) < 0)
> +        goto cleanup;
> +
> +    if (qemuAgentCheckError(cmd, reply) < 0)
> +        goto cleanup;

There is no need to check error here. This function is already being executed
inside qemuAgentCommand(). This is redundant.

> +
> +    if (!(data = virJSONValueObjectGet(reply, "return"))) {
> +        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
> +                       _("malformed return value"));
> +        goto cleanup;
> +    }
> +
> +    if (VIR_STRDUP(*hostname,
> +                   virJSONValueObjectGetString(data, "host-name")) <= 0) {
> +        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
> +                       _("'host-name' missing in reply of guest-get-host-name"));
> +        goto cleanup;
> +    }
> +
> +    ret = 0;
> +
> + cleanup:
> +    virJSONValueFree(cmd);
> +    virJSONValueFree(reply);
> +    return ret;
> +}
>
>  int
>  qemuAgentGetTime(qemuAgentPtr mon,
> diff --git a/src/qemu/qemu_agent.h b/src/qemu/qemu_agent.h
> index 6dd9c702dd..4354b7e0cf 100644
> --- a/src/qemu/qemu_agent.h
> +++ b/src/qemu/qemu_agent.h
> @@ -105,6 +105,10 @@ int qemuAgentUpdateCPUInfo(unsigned int nvcpus,
>                             qemuAgentCPUInfoPtr cpuinfo,
>                             int ncpuinfo);
>
> +int
> +qemuAgentGetHostname(qemuAgentPtr mon,
> +                     char **hostname);
> +
>  int qemuAgentGetTime(qemuAgentPtr mon,
>                       long long *seconds,
>                       unsigned int *nseconds);
> --
> 2.17.1
>

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