Expose stripe offset and stripe size through libgeom and geom(8) userland

utilities.

Reviewed by:	pjd, mav (earlier version)

4 files changed, 55 insertions, 1 deletions

diff --git a/lib/libgeom/geom_util.c b/lib/libgeom/geom_util.c
index 539b6c6..54844c6 100644
--- a/lib/libgeom/geom_util.c
+++ b/lib/libgeom/geom_util.c
@@ -114,6 +114,32 @@ g_sectorsize(int fd)
 }
 
 /*
+ * Return stripe size of the given provider.
+ */
+off_t
+g_stripesize(int fd)
+{
+	off_t stripesize;
+
+	if (g_ioctl_arg(fd, DIOCGSTRIPESIZE, &stripesize) == -1)
+		return (-1);
+	return (stripesize);
+}
+
+/*
+ * Return stripe size of the given provider.
+ */
+off_t
+g_stripeoffset(int fd)
+{
+	off_t stripeoffset;
+
+	if (g_ioctl_arg(fd, DIOCGSTRIPEOFFSET, &stripeoffset) == -1)
+		return (-1);
+	return (stripeoffset);
+}
+
+/*
  * Return the correct provider name.
  */
 char *
diff --git a/lib/libgeom/geom_xml2tree.c b/lib/libgeom/geom_xml2tree.c
index 1c7e22b..821449b 100644
--- a/lib/libgeom/geom_xml2tree.c
+++ b/lib/libgeom/geom_xml2tree.c
@@ -230,6 +230,16 @@ EndElement(void *userData, const char *name)
 		free(p);
 		return;
 	}
+	if (!strcmp(name, "stripesize") && mt->provider != NULL) {
+		mt->provider->lg_stripesize = strtoumax(p, NULL, 0);
+		free(p);
+		return;
+	}
+	if (!strcmp(name, "stripeoffset") && mt->provider != NULL) {
+		mt->provider->lg_stripeoffset = strtoumax(p, NULL, 0);
+		free(p);
+		return;
+	}
 
 	if (!strcmp(name, "config")) {
 		mt->config = NULL;
diff --git a/lib/libgeom/libgeom.3 b/lib/libgeom/libgeom.3
index 9272d3b..3c15805 100644
--- a/lib/libgeom/libgeom.3
+++ b/lib/libgeom/libgeom.3
@@ -28,7 +28,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd September 8, 2008
+.Dd January 16, 2010
 .Dt LIBGEOM 3
 .Os
 .Sh NAME
@@ -50,6 +50,8 @@
 .Nm g_close ,
 .Nm g_mediasize ,
 .Nm g_sectorsize ,
+.Nm g_stripeoffset ,
+.Nm g_stripesize ,
 .Nm g_flush ,
 .Nm g_delete ,
 .Nm g_device_path ,
@@ -101,6 +103,10 @@
 .Fn g_mediasize "int fd"
 .Ft ssize_t
 .Fn g_sectorsize "int fd"
+.Ft ssize_t
+.Fn g_stripeoffset "int fd"
+.Ft ssize_t
+.Fn g_stripesize "int fd"
 .Ft int
 .Fn g_flush "int fd"
 .Ft int
@@ -297,6 +303,14 @@ The
 function returns sector size of the given provider.
 .Pp
 The
+.Fn g_stripeoffset
+function returns stripe size of the given provider.
+.Pp
+The
+.Fn g_stripesize
+function returns stripe size of the given provider.
+.Pp
+The
 .Fn g_flush
 function sends
 .Dv BIO_FLUSH
diff --git a/lib/libgeom/libgeom.h b/lib/libgeom/libgeom.h
index 7255bd4..c951f25 100644
--- a/lib/libgeom/libgeom.h
+++ b/lib/libgeom/libgeom.h
@@ -123,6 +123,8 @@ struct gprovider {
 	char			*lg_mode;
 	off_t			lg_mediasize;
 	u_int			lg_sectorsize;
+	off_t			lg_stripeoffset;
+	off_t			lg_stripesize;
 	struct gconf		lg_config;
 };
 
@@ -149,6 +151,8 @@ int g_open(const char *, int);
 int g_close(int);
 off_t g_mediasize(int);
 ssize_t g_sectorsize(int);
+off_t g_stripeoffset(int);
+off_t g_stripesize(int);
 int g_flush(int);
 int g_delete(int, off_t, off_t);
 int g_get_ident(int, char *, size_t);