Move the g_stat struct to its own .h file, we will export it to other code.

Insted of embedding a struct g_stat in consumers and providers, merely
include a pointer.

Remove a couple of <sys/time.h> includes now unneeded.

Add a special allocator for struct g_stat.  This allocator will allocate
entire pages and hand out g_stat functions from there.  The "id" field
indicates free/used status.

Add "/dev/geom.stats" device driver whic exports the pages from the
allocator to userland with mmap(2) in read-only mode.

This mmap(2) interface should be considered a non-public interface and
the functions in libgeom (not yet committed) should be used to access
the statistics data.

1 files changed, 2 insertions, 0 deletions

diff --git a/sys/geom/geom_kern.c b/sys/geom/geom_kern.c
index a885c28..a925d9a 100644
--- a/sys/geom/geom_kern.c
+++ b/sys/geom/geom_kern.c
@@ -49,6 +49,7 @@
 #include <sys/sbuf.h>
 #include <geom/geom.h>
 #include <geom/geom_int.h>
+#include <geom/geom_stats.h>
 
 MALLOC_DEFINE(M_GEOM, "GEOM", "Geom data structures");
 
@@ -154,6 +155,7 @@ g_init(void)
 {
 	printf("Initializing GEOMetry subsystem\n");
 	sx_init(&topology_lock, "GEOM topology");
+	g_stat_init();
 	g_io_init();
 	g_event_init();
 	mtx_lock(&Giant);