+# 2.6.24
+AC_DEFUN([LIBCFS_NETWORK_NAMESPACE],
+[AC_MSG_CHECKING([for network stack has namespaces])
+LB_LINUX_TRY_COMPILE([
+ #include <net/net_namespace.h>
+],[
+ struct net *net = &init_net;
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_INIT_NET, 1,
+ [kernel is support network namespaces ])
+],[
+ AC_MSG_RESULT(NO)
+])
+])
+
+
+# 2.6.24
+AC_DEFUN([LIBCFS_NETLINK_NETNS],
+[AC_MSG_CHECKING([for netlink support net ns])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/netlink.h>
+],[
+ struct net *net = NULL;
+ struct mutex *lock = NULL;
+
+ netlink_kernel_create(net, 0, 0, NULL,
+ lock,
+ NULL);
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_NETLINK_NS, 1,
+ [netlink is support network namespace])
+# XXX
+# for now - if kernel have netlink ns - he uses cbmutex
+ AC_DEFINE(HAVE_NETLINK_CBMUTEX, 1,
+ [netlink_kernel_create want mutex for callback])
+
+],[
+ AC_MSG_RESULT(NO)
+])
+])
+
+# ~2.6.24
+AC_DEFUN([LIBCFS_NL_BROADCAST_GFP],
+[AC_MSG_CHECKING([for netlink_broadcast is want to have gfp parameter])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/netlink.h>
+],[
+ gfp_t gfp = GFP_KERNEL;
+
+ netlink_broadcast(NULL, NULL, 0, 0, gfp);
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_NL_BROADCAST_GFP, 1,
+ [netlink brouacast is want to have gfp paramter])
+],[
+ AC_MSG_RESULT(NO)
+])
+])
+
+#
+# LIBCFS_FUNC_DUMP_TRACE
+#
+# 2.6.23 exports dump_trace() so we can dump_stack() on any task
+# 2.6.24 has stacktrace_ops.address with "reliable" parameter
+#
+AC_DEFUN([LIBCFS_FUNC_DUMP_TRACE],
+[LB_CHECK_SYMBOL_EXPORT([dump_trace],
+[kernel/ksyms.c arch/${LINUX_ARCH%_64}/kernel/traps_64.c],[
+ tmp_flags="$EXTRA_KCFLAGS"
+ EXTRA_KCFLAGS="-Werror"
+ AC_MSG_CHECKING([whether we can really use dump_trace])
+ LB_LINUX_TRY_COMPILE([
+ struct task_struct;
+ struct pt_regs;
+ #include <asm/stacktrace.h>
+ ],[
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_DUMP_TRACE, 1, [dump_trace is exported])
+ ],[
+ AC_MSG_RESULT(no)
+ ],[
+ ])
+ AC_MSG_CHECKING([whether print_trace_address has reliable argument])
+ LB_LINUX_TRY_COMPILE([
+ struct task_struct;
+ struct pt_regs;
+ void print_addr(void *data, unsigned long addr, int reliable);
+ #include <asm/stacktrace.h>
+ ],[
+ struct stacktrace_ops ops;
+
+ ops.address = print_addr;
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_TRACE_ADDRESS_RELIABLE, 1,
+ [print_trace_address has reliable argument])
+ ],[
+ AC_MSG_RESULT(no)
+ ],[
+ ])
+EXTRA_KCFLAGS="$tmp_flags"
+])
+])
+
+