[libvirt] [PATCH 6/9] admin: Add URI support and introduce virAdmGetDefaultURI
Erik Skultety
eskultet at redhat.com
Tue Oct 13 13:38:19 UTC 2015
Since virt-admin should be able to connect to various admin servers
on hosted different daemons, we need to provide URI support to
libvirt-admin.
---
include/libvirt/libvirt-admin.h | 2 +
src/datatypes.c | 2 +
src/datatypes.h | 1 +
src/libvirt-admin.c | 132 +++++++++++++++++++++++++++++++---------
src/libvirt_admin_public.syms | 1 +
tools/virt-admin.c | 38 ++++++++++++
6 files changed, 146 insertions(+), 30 deletions(-)
diff --git a/include/libvirt/libvirt-admin.h b/include/libvirt/libvirt-admin.h
index 2358173..4b6b719 100644
--- a/include/libvirt/libvirt-admin.h
+++ b/include/libvirt/libvirt-admin.h
@@ -76,6 +76,8 @@ int virAdmConnectUnregisterCloseCallback(virAdmConnectPtr conn,
int virAdmConnectGetLibVersion(virAdmConnectPtr conn,
unsigned long long *libVer);
+char * virAdmConnectGetURI(virAdmConnectPtr conn);
+
# ifdef __cplusplus
}
# endif
diff --git a/src/datatypes.c b/src/datatypes.c
index 9e374e4..1d2329c 100644
--- a/src/datatypes.c
+++ b/src/datatypes.c
@@ -839,6 +839,8 @@ virAdmConnectDispose(void *obj)
if (conn->privateDataFreeFunc)
conn->privateDataFreeFunc(conn);
+ virURIFree(conn->uri);
+
virObjectUnref(conn->closeCallback);
}
diff --git a/src/datatypes.h b/src/datatypes.h
index 33df476..aa160a8 100644
--- a/src/datatypes.h
+++ b/src/datatypes.h
@@ -408,6 +408,7 @@ struct _virConnect {
*/
struct _virAdmConnect {
virObjectLockable object;
+ virURIPtr uri;
void *privateData;
virFreeCallback privateDataFreeFunc;
diff --git a/src/libvirt-admin.c b/src/libvirt-admin.c
index 2da3d43..252fdbe 100644
--- a/src/libvirt-admin.c
+++ b/src/libvirt-admin.c
@@ -29,6 +29,7 @@
#include "configmake.h"
#include "viralloc.h"
+#include "virconf.h"
#include "virlog.h"
#include "virnetclient.h"
#include "virobject.h"
@@ -283,60 +284,54 @@ virAdmInitialize(void)
}
static char *
-getSocketPath(const char *name)
+getSocketPath(virURIPtr uri)
{
char *rundir = virGetUserRuntimeDirectory();
char *sock_path = NULL;
size_t i = 0;
- virURIPtr uri = NULL;
- if (name) {
- if (!(uri = virURIParse(name)))
- goto error;
+ if (!uri)
+ goto cleanup;
- if (STRNEQ(uri->scheme, "admin") ||
- uri->server || uri->user || uri->fragment) {
- virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
- _("Invalid connection name '%s'"), name);
- goto error;
- }
- for (i = 0; i < uri->paramsCount; i++) {
- virURIParamPtr param = &uri->params[i];
+ for (i = 0; i < uri->paramsCount; i++) {
+ virURIParamPtr param = &uri->params[i];
- if (STREQ(param->name, "socket")) {
- VIR_FREE(sock_path);
- if (VIR_STRDUP(sock_path, param->value) < 0)
- goto error;
- } else {
- virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
- _("Unknown URI parameter '%s'"), param->name);
+ if (STREQ(param->name, "socket")) {
+ VIR_FREE(sock_path);
+ if (VIR_STRDUP(sock_path, param->value) < 0)
goto error;
- }
+ } else {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("Unknown URI parameter '%s'"), param->name);
+ goto error;
}
}
if (!sock_path) {
- if (!uri || !uri->path || STREQ(uri->path, "/system")) {
+ if (STRNEQ(uri->scheme, "libvirtd")) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("Unsupported URI scheme '%s'"),
+ uri->scheme);
+ goto error;
+ }
+ if (STREQ_NULLABLE(uri->path, "/system")) {
if (VIR_STRDUP(sock_path, LIBVIRTD_ADMIN_UNIX_SOCKET) < 0)
goto error;
} else if (STREQ_NULLABLE(uri->path, "/session")) {
- if (!rundir)
- goto error;
-
- if (virAsprintf(&sock_path,
- "%s%s", rundir, LIBVIRTD_ADMIN_SOCK_NAME) < 0)
+ if (!rundir && virAsprintf(&sock_path, "%s%s", rundir,
+ LIBVIRTD_ADMIN_SOCK_NAME) < 0)
goto error;
} else {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
- _("Invalid URI path '%s'"), uri->path);
+ _("Invalid URI path '%s', try '/system'"),
+ uri->path ? uri->path : "");
goto error;
}
}
cleanup:
VIR_FREE(rundir);
- virURIFree(uri);
return sock_path;
error:
@@ -344,6 +339,40 @@ getSocketPath(const char *name)
goto cleanup;
}
+static int
+virAdmGetDefaultURI(virConfPtr conf, virURIPtr *uri)
+{
+ virConfValuePtr value = NULL;
+ const char *uristr = NULL;
+
+ uristr = virGetEnvBlockSUID("LIBVIRT_ADMIN_DEFAULT_URI");
+ if (uristr && *uristr) {
+ VIR_DEBUG("Using LIBVIRT_ADMIN_DEFAULT_URI '%s'", uristr);
+ } else if ((value = virConfGetValue(conf, "uri_default_admin"))) {
+ if (value->type != VIR_CONF_STRING) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("Expected a string for 'uri_default_admin' config "
+ "parameter"));
+ return -1;
+ }
+
+ VIR_DEBUG("Using config file uri '%s'", value->str);
+ uristr = value->str;
+ } else {
+ /* Since we can't probe connecting via any hypervisor driver as libvirt
+ * does, if no explicit URI was given and neither the environment
+ * variable, nor the configuration parameter had previously been set,
+ * we set the default admin server URI to 'libvirtd://system'.
+ */
+ uristr = "libvirtd:///system";
+ }
+
+ if (!(*uri = virURIParse(uristr)))
+ return -1;
+
+ return 0;
+}
+
/**
* virAdmConnectOpen:
* @name: uri of the daemon to connect to, NULL for default
@@ -358,6 +387,7 @@ virAdmConnectOpen(const char *name, unsigned int flags)
{
char *sock_path = NULL;
virAdmConnectPtr conn = NULL;
+ virConfPtr conf = NULL;
if (virAdmInitialize() < 0)
goto error;
@@ -368,7 +398,18 @@ virAdmConnectOpen(const char *name, unsigned int flags)
if (!(conn = virAdmConnectNew()))
goto error;
- if (!(sock_path = getSocketPath(name)))
+ if (virGetLibvirtConfigFile(&conf) < 0)
+ goto error;
+
+ if (!name) {
+ if (virAdmGetDefaultURI(conf, &conn->uri) < 0)
+ goto error;
+ } else {
+ if (!(conn->uri = virURIParse(name)))
+ goto error;
+ }
+
+ if (!(sock_path = getSocketPath(conn->uri)))
goto error;
if (!(conn->privateData = remoteAdminPrivNew(sock_path)))
@@ -635,3 +676,34 @@ int virAdmConnectGetLibVersion(virAdmConnectPtr conn,
virDispatchError(NULL);
return -1;
}
+
+/**
+ * virAdmConnectGetURI:
+ * @conn: pointer to an admin connection
+ *
+ * String returned by this method is normally the same as the string passed
+ * to the virAdmConnectOpen. Even if NULL was passed to virAdmConnectOpen,
+ * this method returns a non-null URI string.
+ *
+ * Returns an URI string related to the connection or NULL in case of an error.
+ * Caller is responsible for freeing the string.
+ */
+char *
+virAdmConnectGetURI(virAdmConnectPtr conn)
+{
+ char *uri = NULL;
+ VIR_DEBUG("conn=%p", conn);
+
+ virResetLastError();
+
+ virCheckAdmConnectReturn(conn, NULL);
+
+ if (!(uri = virURIFormat(conn->uri)))
+ goto error;
+
+ return uri;
+
+ error:
+ virDispatchError(NULL);
+ return uri;
+}
diff --git a/src/libvirt_admin_public.syms b/src/libvirt_admin_public.syms
index 273af4d..4467c88 100644
--- a/src/libvirt_admin_public.syms
+++ b/src/libvirt_admin_public.syms
@@ -19,4 +19,5 @@ LIBVIRT_ADMIN_1.3.0 {
virAdmConnectRegisterCloseCallback;
virAdmConnectUnregisterCloseCallback;
virAdmConnectGetLibVersion;
+ virAdmConnectGetURI;
};
diff --git a/tools/virt-admin.c b/tools/virt-admin.c
index 0c807f2..a202ce2 100644
--- a/tools/virt-admin.c
+++ b/tools/virt-admin.c
@@ -203,6 +203,38 @@ cmdVersion(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
return true;
}
+/*
+ * 'uri' command
+ */
+
+static const vshCmdInfo info_uri[] = {
+ {.name = "help",
+ .data = N_("print the admin server URI")
+ },
+ {.name = "desc",
+ .data = ""
+ },
+ {.name = NULL}
+};
+
+static bool
+cmdURI(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
+{
+ char *uri;
+ vshAdmControlPtr priv = ctl->privData;
+
+ uri = virAdmConnectGetURI(priv->conn);
+ if (!uri) {
+ vshError(ctl, "%s", _("failed to get URI"));
+ return false;
+ }
+
+ vshPrint(ctl, "%s\n", uri);
+ VIR_FREE(uri);
+
+ return true;
+}
+
/* ---------------
* Command Connect
@@ -547,6 +579,12 @@ static const vshCmdDef vshAdmCmds[] = {
.info = info_version,
.flags = 0
},
+ {.name = "uri",
+ .handler = cmdURI,
+ .opts = NULL,
+ .info = info_uri,
+ .flags = 0
+ },
{.name = "connect",
.handler = cmdConnect,
.opts = opts_connect,
--
2.4.3
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