MFC nv(3) and part of nv(9) to stable/10

This includes the following revisions from head:

r258065,r258594,r259430,r260222,r261407,r261408,r263479,r264021,r266351,
r269603,r271026,r271027,r271028,r271241,r271578,r271579,r271847,r272102,
r272843,r273752,r277920,r277921,r277925,r277926,r277927,r279421,r279422,
r279423,r279424,r279425,r279426,r279427,r279428,r279429,r279430,r279431,
r279432,r279434,r279435,r279436,r279438,r279439,r279440,r279760,r282122,
r282254,r282257,r282304,r282312,r285339,r288340

This change reverts stable/10@r282122 and stable/10@r288340, and re-MFCs the
series again (r282122, r285339, and r288340).

More changes are pending to nv(9)/pci(4) after further review/work. Please see
the Phabricator review for more details (both https://reviews.freebsd.org/D4232
and https://reviews.freebsd.org/D4249 ).

- Tested with:
-- Booting VMware Fusion 8.1.0 running on a Haswell Apple Macbook Pro
-- Booting a Haswell machine with zfs and running some stress workloads with
   VirtualBox guests
-- make tinderbox
-- kyua test -k /usr/tests/lib/libnv

Differential Revision: https://reviews.freebsd.org/D4249 (part of a larger diff)
Relnotes: yes
Reviewed by: oshogbo (implicit), sbruno (implicit)
Submitted by: Kevin Bowling <kevin.bowling@kev009.com>
Sponsored by: EMC / Isilon Storage Division

1 files changed, 128 insertions, 0 deletions

diff --git a/sys/kern/subr_dnvlist.c b/sys/kern/subr_dnvlist.c
new file mode 100644
index 0000000..9058520
--- /dev/null
+++ b/sys/kern/subr_dnvlist.c
@@ -0,0 +1,128 @@
+/*-
+ * Copyright (c) 2013 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Pawel Jakub Dawidek under sponsorship from
+ * the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#ifdef _KERNEL
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+
+#include <machine/stdarg.h>
+
+#else
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#endif
+
+#include <sys/nv.h>
+#include <sys/nv_impl.h>
+
+#include <sys/dnv.h>
+
+#define	DNVLIST_GET(ftype, type)					\
+ftype									\
+dnvlist_get_##type(const nvlist_t *nvl, const char *name, ftype defval)	\
+{									\
+									\
+	if (nvlist_exists_##type(nvl, name))				\
+		return (nvlist_get_##type(nvl, name));			\
+	else								\
+		return (defval);					\
+}
+
+DNVLIST_GET(bool, bool)
+DNVLIST_GET(uint64_t, number)
+DNVLIST_GET(const char *, string)
+DNVLIST_GET(const nvlist_t *, nvlist)
+#ifndef _KERNEL
+DNVLIST_GET(int, descriptor)
+#endif
+
+#undef	DNVLIST_GET
+
+const void *
+dnvlist_get_binary(const nvlist_t *nvl, const char *name, size_t *sizep,
+    const void *defval, size_t defsize)
+{
+	const void *value;
+
+	if (nvlist_exists_binary(nvl, name))
+		value = nvlist_get_binary(nvl, name, sizep);
+	else {
+		if (sizep != NULL)
+			*sizep = defsize;
+		value = defval;
+	}
+	return (value);
+}
+
+#define	DNVLIST_TAKE(ftype, type)					\
+ftype									\
+dnvlist_take_##type(nvlist_t *nvl, const char *name, ftype defval)	\
+{									\
+									\
+	if (nvlist_exists_##type(nvl, name))				\
+		return (nvlist_take_##type(nvl, name));			\
+	else								\
+		return (defval);					\
+}
+
+DNVLIST_TAKE(bool, bool)
+DNVLIST_TAKE(uint64_t, number)
+DNVLIST_TAKE(char *, string)
+DNVLIST_TAKE(nvlist_t *, nvlist)
+#ifndef _KERNEL
+DNVLIST_TAKE(int, descriptor)
+#endif
+
+#undef	DNVLIST_TAKE
+
+void *
+dnvlist_take_binary(nvlist_t *nvl, const char *name, size_t *sizep,
+    void *defval, size_t defsize)
+{
+	void *value;
+
+	if (nvlist_exists_binary(nvl, name))
+		value = nvlist_take_binary(nvl, name, sizep);
+	else {
+		if (sizep != NULL)
+			*sizep = defsize;
+		value = defval;
+	}
+	return (value);
+}
+