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, 5 insertions, 0 deletions

diff --git a/sys/geom/geom_int.h b/sys/geom/geom_int.h
index 3b33501..0323e01 100644
--- a/sys/geom/geom_int.h
+++ b/sys/geom/geom_int.h
@@ -100,3 +100,8 @@ void g_io_schedule_up(struct thread *tp);
 
 /* geom_kern.c / geom_kernsim.c */
 void g_init(void);
+
+/* geom_stats.c */
+void g_stat_init(void);
+struct g_stat *g_stat_new(void *id);
+void g_stat_delete(struct g_stat *);