Fix kstat xuio

Move xiou stat structures from a header to the dmu.c source as is
done with all the other kstat interfaces.  This information is local
to dmu.c registered the xuio kstat and should stay that way.

Signed-off-by: Brian Behlendorf <[email protected]>

1 files changed, 25 insertions, 0 deletions

diff --git a/module/zfs/dmu.c b/module/zfs/dmu.c
index 732742f33..7f17c736f 100644
--- a/module/zfs/dmu.c
+++ b/module/zfs/dmu.c
@@ -831,6 +831,31 @@ dmu_prealloc(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
  */
 kstat_t *xuio_ksp = NULL;
 
+typedef struct xuio_stats {
+	/* loaned yet not returned arc_buf */
+	kstat_named_t xuiostat_onloan_rbuf;
+	kstat_named_t xuiostat_onloan_wbuf;
+	/* whether a copy is made when loaning out a read buffer */
+	kstat_named_t xuiostat_rbuf_copied;
+	kstat_named_t xuiostat_rbuf_nocopy;
+	/* whether a copy is made when assigning a write buffer */
+	kstat_named_t xuiostat_wbuf_copied;
+	kstat_named_t xuiostat_wbuf_nocopy;
+} xuio_stats_t;
+
+static xuio_stats_t xuio_stats = {
+	{ "onloan_read_buf",	KSTAT_DATA_UINT64 },
+	{ "onloan_write_buf",	KSTAT_DATA_UINT64 },
+	{ "read_buf_copied",	KSTAT_DATA_UINT64 },
+	{ "read_buf_nocopy",	KSTAT_DATA_UINT64 },
+	{ "write_buf_copied",	KSTAT_DATA_UINT64 },
+	{ "write_buf_nocopy",	KSTAT_DATA_UINT64 }
+};
+
+#define XUIOSTAT_INCR(stat, val)        \
+        atomic_add_64(&xuio_stats.stat.value.ui64, (val))
+#define XUIOSTAT_BUMP(stat)     XUIOSTAT_INCR(stat, 1)
+
 int
 dmu_xuio_init(xuio_t *xuio, int nblk)
 {