Add policy for /usr/libexec/samba/samba-bgqd

samba-bgqd is a daemon enumerating cups printers and storing the
gathered information in a cache. Since gathering the information about
one printer takes about 1 sec, in environments with many printers
the process may get killed before finishing. Providing a way to start
samba-bgqd as a systemd service and always having it running in the
background is a solution to this issue.

Resolves: RHEL-53124

policy/modules/contrib/samba.fc

@@ -19,6 +19,7 @@
 /usr/lib/systemd/system/winbind.*   --  gen_context(system_u:object_r:samba_unit_file_t,s0)
 
 /usr/libexec/samba/rpcd_lsad	--	gen_context(system_u:object_r:winbind_rpcd_exec_t,s0)
+/usr/libexec/samba/samba-bgqd	--	gen_context(system_u:object_r:samba_bgqd_exec_t,s0)
 /usr/libexec/samba/samba-dcerpcd --	gen_context(system_u:object_r:winbind_rpcd_exec_t,s0)
 
 /usr/bin/net			--	gen_context(system_u:object_r:samba_net_exec_t,s0)

policy/modules/contrib/samba.if

@@ -1118,3 +1118,22 @@ interface(`samba_domtrans_winbind_rpcd',`
 	corecmd_search_bin($1)
 	domtrans_pattern($1, winbind_rpcd_exec_t, winbind_rpcd_t)
 ')
+
+########################################
+## <summary>
+##	Execute samba-bgqd in the caller domain.
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed accesss.
+##	</summary>
+## </param>
+#
+interface(`samba_exec_bgqd',`
+	gen_require(`
+		type samba_bgqd_exec_t;
+	')
+
+	corecmd_search_bin($1)
+	can_exec($1, samba_bgqd_exec_t)
+')

policy/modules/contrib/samba.te

@@ -134,6 +134,10 @@ type samba_gpupdate_exec_t;
 application_domain(samba_gpupdate_t, samba_gpupdate_exec_t)
 role system_r types samba_gpupdate_t;
 
+type samba_bgqd_t;
+type samba_bgqd_exec_t;
+init_daemon_domain(samba_bgqd_t, samba_bgqd_exec_t)
+
 type smbcontrol_t;
 type smbcontrol_exec_t;
 application_domain(smbcontrol_t, smbcontrol_exec_t)
@@ -300,6 +304,20 @@ optional_policy(`
 	certmonger_domtrans(samba_gpupdate_t)
 ')
 
+########################################
+#
+# samba-bgqd Local policy
+#
+
+permissive samba_bgqd_t;
+
+read_files_pattern(samba_bgqd_t, samba_etc_t, samba_etc_t)
+manage_files_pattern(samba_bgqd_t, samba_log_t, samba_log_t)
+manage_files_pattern(samba_bgqd_t, samba_var_t, samba_var_t)
+manage_sock_files_pattern(samba_bgqd_t, samba_var_t, samba_var_t)
+
+corenet_tcp_connect_ipp_port(samba_bgqd_t)
+
 ########################################
 #
 # smbd Local policy