admin: Introduce virAdmConnectGetLoggingFilters

Enable libvirt users to query logging filter settings.
Signed-off-by: NErik Skultety <eskultet@redhat.com>

daemon/admin.c

@@ -399,6 +399,22 @@ adminConnectGetLoggingOutputs(char **outputs, unsigned int flags)
     return virLogGetNbOutputs();
 }
 
+/* Returns the number of defined filters or -1 in case of an error */
+static int
+adminConnectGetLoggingFilters(char **filters, unsigned int flags)
+{
+    char *tmp = NULL;
+    int ret = 0;
+
+    virCheckFlags(0, -1);
+
+    if ((ret = virLogGetNbFilters()) > 0 && !(tmp = virLogGetFilters()))
+        return -1;
+
+    *filters = tmp;
+    return ret;
+}
+
 static int
 adminDispatchConnectGetLoggingOutputs(virNetServerPtr server ATTRIBUTE_UNUSED,
                                       virNetServerClientPtr client ATTRIBUTE_UNUSED,
@@ -420,4 +436,35 @@ adminDispatchConnectGetLoggingOutputs(virNetServerPtr server ATTRIBUTE_UNUSED,
 
     return 0;
 }
+
+static int
+adminDispatchConnectGetLoggingFilters(virNetServerPtr server ATTRIBUTE_UNUSED,
+                                      virNetServerClientPtr client ATTRIBUTE_UNUSED,
+                                      virNetMessagePtr msg ATTRIBUTE_UNUSED,
+                                      virNetMessageErrorPtr rerr,
+                                      admin_connect_get_logging_filters_args *args,
+                                      admin_connect_get_logging_filters_ret *ret)
+{
+    char *filters = NULL;
+    int nfilters = 0;
+
+    if ((nfilters = adminConnectGetLoggingFilters(&filters, args->flags)) < 0) {
+        virNetMessageSaveError(rerr);
+        return -1;
+    }
+
+    if (nfilters == 0) {
+        ret->filters = NULL;
+    } else {
+        char **ret_filters = NULL;
+        if (VIR_ALLOC(ret_filters) < 0)
+            return -1;
+
+        *ret_filters = filters;
+        ret->filters = ret_filters;
+    }
+    ret->nfilters = nfilters;
+
+    return 0;
+}
 #include "admin_dispatch.h"

include/libvirt/libvirt-admin.h

@@ -408,6 +408,10 @@ int virAdmConnectGetLoggingOutputs(virAdmConnectPtr conn,
                                    char **outputs,
                                    unsigned int flags);
 
+int virAdmConnectGetLoggingFilters(virAdmConnectPtr conn,
+                                   char **filters,
+                                   unsigned int flags);
+
 # ifdef __cplusplus
 }
 # endif

src/admin/admin_protocol.x

@@ -192,6 +192,15 @@ struct admin_connect_get_logging_outputs_ret {
     unsigned int noutputs;
 };
 
+struct admin_connect_get_logging_filters_args {
+    unsigned int flags;
+};
+
+struct admin_connect_get_logging_filters_ret {
+    admin_string filters;
+    unsigned int nfilters;
+};
+
 /* Define the program number, protocol version and procedure numbers here. */
 const ADMIN_PROGRAM = 0x06900690;
 const ADMIN_PROTOCOL_VERSION = 1;
@@ -282,5 +291,10 @@ enum admin_procedure {
     /**
      * @generate: none
      */
-    ADMIN_PROC_CONNECT_GET_LOGGING_OUTPUTS = 14
+    ADMIN_PROC_CONNECT_GET_LOGGING_OUTPUTS = 14,
+
+    /**
+     * @generate: none
+     */
+    ADMIN_PROC_CONNECT_GET_LOGGING_FILTERS = 15
 };

src/admin/admin_remote.c

@@ -460,3 +460,38 @@ remoteAdminConnectGetLoggingOutputs(virAdmConnectPtr conn,
     virObjectUnlock(priv);
     return rv;
 }
+
+static int
+remoteAdminConnectGetLoggingFilters(virAdmConnectPtr conn,
+                                    char **filters,
+                                    unsigned int flags)
+{
+    int rv = -1;
+    remoteAdminPrivPtr priv = conn->privateData;
+    admin_connect_get_logging_filters_args args;
+    admin_connect_get_logging_filters_ret ret;
+
+    args.flags = flags;
+
+    memset(&ret, 0, sizeof(ret));
+    virObjectLock(priv);
+
+    if (call(conn,
+             0,
+             ADMIN_PROC_CONNECT_GET_LOGGING_FILTERS,
+             (xdrproc_t) xdr_admin_connect_get_logging_filters_args,
+             (char *) &args,
+             (xdrproc_t) xdr_admin_connect_get_logging_filters_ret,
+             (char *) &ret) == -1)
+        goto done;
+
+    if (filters)
+        *filters = ret.filters ? *ret.filters : NULL;
+
+    rv = ret.nfilters;
+    VIR_FREE(ret.filters);
+
+ done:
+    virObjectUnlock(priv);
+    return rv;
+}

src/admin_protocol-structs

@@ -134,6 +134,13 @@ struct admin_connect_get_logging_outputs_ret {
         admin_nonnull_string       outputs;
         u_int                      noutputs;
 };
+struct admin_connect_get_logging_filters_args {
+        u_int                      flags;
+};
+struct admin_connect_get_logging_filters_ret {
+        admin_string               filters;
+        u_int                      nfilters;
+};
 enum admin_procedure {
         ADMIN_PROC_CONNECT_OPEN = 1,
         ADMIN_PROC_CONNECT_CLOSE = 2,
@@ -149,4 +156,5 @@ enum admin_procedure {
         ADMIN_PROC_SERVER_GET_CLIENT_LIMITS = 12,
         ADMIN_PROC_SERVER_SET_CLIENT_LIMITS = 13,
         ADMIN_PROC_CONNECT_GET_LOGGING_OUTPUTS = 14,
+        ADMIN_PROC_CONNECT_GET_LOGGING_FILTERS = 15,
 };

src/libvirt-admin.c

@@ -1124,3 +1124,44 @@ virAdmConnectGetLoggingOutputs(virAdmConnectPtr conn,
     virDispatchError(NULL);
     return -1;
 }
+
+/**
+ * virAdmConnectGetLoggingFilters:
+ * @conn: pointer to an active admin connection
+ * @filters: pointer to a variable to store a string containing all currently
+ *           defined logging filters on daemon (allocated automatically) or
+ *           NULL if just the number of defined outputs is required
+ * @flags: extra flags; not used yet, so callers should always pass 0
+ *
+ * Retrieves a list of currently installed logging filters. Filters returned
+ * are contained within an automatically allocated string and delimited by
+ * spaces. The format of each filter conforms to the format described in
+ * daemon's configuration file (e.g. libvirtd.conf).
+ *
+ * To retrieve individual filters, additional parsing needs to be done by the
+ * caller. Caller is also responsible for freeing @filters correctly.
+ *
+ * Returns the number of filters returned in @filters, or -1 in case of
+ * an error.
+ */
+int
+virAdmConnectGetLoggingFilters(virAdmConnectPtr conn,
+                               char **filters,
+                               unsigned int flags)
+{
+    int ret = -1;
+
+    VIR_DEBUG("conn=%p, flags=%x", conn, flags);
+
+    virResetLastError();
+    virCheckAdmConnectReturn(conn, -1);
+
+    if ((ret = remoteAdminConnectGetLoggingFilters(conn, filters,
+                                                   flags)) < 0)
+        goto error;
+
+    return ret;
+ error:
+    virDispatchError(NULL);
+    return -1;
+}

src/libvirt_admin_private.syms

@@ -10,6 +10,8 @@ xdr_admin_client_close_args;
 xdr_admin_client_get_info_args;
 xdr_admin_client_get_info_ret;
 xdr_admin_connect_get_lib_version_ret;
+xdr_admin_connect_get_logging_filters_args;
+xdr_admin_connect_get_logging_filters_ret;
 xdr_admin_connect_get_logging_outputs_args;
 xdr_admin_connect_get_logging_outputs_ret;
 xdr_admin_connect_list_servers_args;

src/libvirt_admin_public.syms

@@ -43,4 +43,5 @@ LIBVIRT_ADMIN_2.0.0 {
 LIBVIRT_ADMIN_3.0.0 {
     global:
         virAdmConnectGetLoggingOutputs;
+        virAdmConnectGetLoggingFilters;
 } LIBVIRT_ADMIN_2.0.0;