Add nvlist_flags() function, which returns nvlist's public flags.

Approved by:	pjd (mentor)

4 files changed, 23 insertions, 1 deletions

diff --git a/lib/libnv/Makefile b/lib/libnv/Makefile
index 766d691..8b2fc78 100644
--- a/lib/libnv/Makefile
+++ b/lib/libnv/Makefile
@@ -47,6 +47,7 @@ MLINKS+=nv.3 nvlist_add_binary.3 \
 	nv.3 nvlist_exists_string.3 \
 	nv.3 nvlist_exists_type.3 \
 	nv.3 nvlist_fdump.3 \
+	nv.3 nvlist_flags.3 \
 	nv.3 nvlist_free.3 \
 	nv.3 nvlist_free_binary.3 \
 	nv.3 nvlist_free_bool.3 \
diff --git a/lib/libnv/nv.3 b/lib/libnv/nv.3
index be6e0fe..bbb7b03 100644
--- a/lib/libnv/nv.3
+++ b/lib/libnv/nv.3
@@ -28,7 +28,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd January 30, 2015
+.Dd May 1, 2015
 .Dt NV 3
 .Os
 .Sh NAME
@@ -37,6 +37,7 @@
 .Nm nvlist_error ,
 .Nm nvlist_set_error ,
 .Nm nvlist_empty ,
+.Nm nvlist_flags ,
 .Nm nvlist_exists ,
 .Nm nvlist_free ,
 .Nm nvlist_clone ,
@@ -68,6 +69,8 @@
 .Fn nvlist_set_error "nvlist_t *nvl, int error"
 .Ft bool
 .Fn nvlist_empty "const nvlist_t *nvl"
+.Ft int
+.Fn nvlist_flags "const nvlist_t *nvl"
 .\"
 .Ft "nvlist_t *"
 .Fn nvlist_clone "const nvlist_t *nvl"
@@ -269,6 +272,12 @@ otherwise.
 The nvlist must not be in error state.
 .Pp
 The
+.Fn nvlist_flags
+function returns flags used to create the nvlist with the
+.Fn nvlist_create
+function.
+.Pp
+The
 .Fn nvlist_clone
 functions clones the given nvlist.
 The clone shares no resources with its origin.
diff --git a/sys/kern/subr_nvlist.c b/sys/kern/subr_nvlist.c
index 6f1d1d5..f96b890 100644
--- a/sys/kern/subr_nvlist.c
+++ b/sys/kern/subr_nvlist.c
@@ -230,6 +230,17 @@ nvlist_empty(const nvlist_t *nvl)
 	return (nvlist_first_nvpair(nvl) == NULL);
 }
 
+int
+nvlist_flags(const nvlist_t *nvl)
+{
+
+	NVLIST_ASSERT(nvl);
+	PJDLOG_ASSERT(nvl->nvl_error == 0);
+	PJDLOG_ASSERT((nvl->nvl_flags & ~(NV_FLAG_PUBLIC_MASK)) == 0);
+
+	return (nvl->nvl_flags);
+}
+
 static void
 nvlist_report_missing(int type, const char *name)
 {
diff --git a/sys/sys/nv.h b/sys/sys/nv.h
index f113dd9..5c342dc 100644
--- a/sys/sys/nv.h
+++ b/sys/sys/nv.h
@@ -75,6 +75,7 @@ nvlist_t	*nvlist_create(int flags);
 void		 nvlist_destroy(nvlist_t *nvl);
 int		 nvlist_error(const nvlist_t *nvl);
 bool		 nvlist_empty(const nvlist_t *nvl);
+int		 nvlist_flags(const nvlist_t *nvl);
 void		 nvlist_set_error(nvlist_t *nvl, int error);
 
 nvlist_t *nvlist_clone(const nvlist_t *nvl);