vm_object_kvme_type(): reimplement by embedding kvme_type into pagerops

Reviewed by:	markj
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D30168

sys/vm/default_pager.c

@@ -40,6 +40,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/proc.h>
 #include <sys/resourcevar.h>
 #include <sys/rwlock.h>
+#include <sys/user.h>
 
 #include <vm/vm.h>
 #include <vm/vm_object.h>
@@ -71,6 +72,7 @@ static boolean_t	default_pager_haspage(vm_object_t, vm_pindex_t, int *,
  * object is converted to swap pager type.
  */
 const struct pagerops defaultpagerops = {
+	.pgo_kvme_type = KVME_TYPE_DEFAULT,
 	.pgo_alloc =	default_pager_alloc,
 	.pgo_dealloc =	default_pager_dealloc,
 	.pgo_getpages =	default_pager_getpages,

sys/vm/device_pager.c

@@ -48,6 +48,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/mman.h>
 #include <sys/rwlock.h>
 #include <sys/sx.h>
+#include <sys/user.h>
 #include <sys/vmmeter.h>
 
 #include <vm/vm.h>
@@ -75,6 +76,7 @@ static struct pagerlst dev_pager_object_list;
 static struct mtx dev_pager_mtx;
 
 const struct pagerops devicepagerops = {
+	.pgo_kvme_type = KVME_TYPE_DEVICE,
 	.pgo_init =	dev_pager_init,
 	.pgo_alloc =	dev_pager_alloc,
 	.pgo_dealloc =	dev_pager_dealloc,
@@ -84,6 +86,7 @@ const struct pagerops devicepagerops = {
 };
 
 const struct pagerops mgtdevicepagerops = {
+	.pgo_kvme_type = KVME_TYPE_MGTDEVICE,
 	.pgo_alloc =	dev_pager_alloc,
 	.pgo_dealloc =	dev_pager_dealloc,
 	.pgo_getpages =	dev_pager_getpages,

sys/vm/phys_pager.c

@@ -38,6 +38,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/mman.h>
 #include <sys/rwlock.h>
 #include <sys/sysctl.h>
+#include <sys/user.h>
 
 #include <vm/vm.h>
 #include <vm/vm_param.h>
@@ -299,6 +300,7 @@ phys_pager_haspage(vm_object_t object, vm_pindex_t pindex, int *before,
 }
 
 const struct pagerops physpagerops = {
+	.pgo_kvme_type = KVME_TYPE_PHYS,
 	.pgo_init =	phys_pager_init,
 	.pgo_alloc =	phys_pager_alloc,
 	.pgo_dealloc = 	phys_pager_dealloc,

sys/vm/sg_pager.c

@@ -40,6 +40,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/mutex.h>
 #include <sys/rwlock.h>
 #include <sys/sglist.h>
+#include <sys/user.h>
 #include <sys/vmmeter.h>
 
 #include <vm/vm.h>
@@ -60,6 +61,7 @@ static boolean_t sg_pager_haspage(vm_object_t, vm_pindex_t, int *,
 		int *);
 
 const struct pagerops sgpagerops = {
+	.pgo_kvme_type = KVME_TYPE_SG,
 	.pgo_alloc =	sg_pager_alloc,
 	.pgo_dealloc =	sg_pager_dealloc,
 	.pgo_getpages =	sg_pager_getpages,

sys/vm/swap_pager.c

@@ -99,6 +99,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/sysproto.h>
 #include <sys/systm.h>
 #include <sys/sx.h>
+#include <sys/user.h>
 #include <sys/vmmeter.h>
 #include <sys/vnode.h>
 
@@ -442,6 +443,7 @@ static void	swap_pager_freespace(vm_object_t object, vm_pindex_t start,
     vm_size_t size);
 
 const struct pagerops swappagerops = {
+	.pgo_kvme_type = KVME_TYPE_SWAP,
 	.pgo_init =	swap_pager_init,	/* early system initialization of pager	*/
 	.pgo_alloc =	swap_pager_alloc,	/* allocate an OBJT_SWAP object */
 	.pgo_dealloc =	swap_pager_dealloc,	/* deallocate an OBJT_SWAP object */
@@ -456,6 +458,7 @@ const struct pagerops swappagerops = {
 };
 
 const struct pagerops swaptmpfspagerops = {
+	.pgo_kvme_type = KVME_TYPE_VNODE,
 	.pgo_alloc =	swap_tmpfs_pager_alloc,
 	.pgo_dealloc =	swap_pager_dealloc,
 	.pgo_getpages =	swap_pager_getpages,

sys/vm/vm_object.c

@@ -2469,41 +2469,6 @@ vm_object_busy_wait(vm_object_t obj, const char *wmesg)
 	(void)blockcount_sleep(&obj->busy, NULL, wmesg, PVM);
 }
 
-/*
- * Return the kvme type of the given object.
- * If vpp is not NULL, set it to the object's vm_object_vnode() or NULL.
- */
-int
-vm_object_kvme_type(vm_object_t object, struct vnode **vpp)
-{
-
-	VM_OBJECT_ASSERT_LOCKED(object);
-	if (vpp != NULL)
-		*vpp = vm_object_vnode(object);
-	switch (object->type) {
-	case OBJT_DEFAULT:
-		return (KVME_TYPE_DEFAULT);
-	case OBJT_VNODE:
-		return (KVME_TYPE_VNODE);
-	case OBJT_SWAP:
-		return (KVME_TYPE_SWAP);
-	case OBJT_SWAP_TMPFS:
-		return (KVME_TYPE_VNODE);
-	case OBJT_DEVICE:
-		return (KVME_TYPE_DEVICE);
-	case OBJT_PHYS:
-		return (KVME_TYPE_PHYS);
-	case OBJT_DEAD:
-		return (KVME_TYPE_DEAD);
-	case OBJT_SG:
-		return (KVME_TYPE_SG);
-	case OBJT_MGTDEVICE:
-		return (KVME_TYPE_MGTDEVICE);
-	default:
-		return (KVME_TYPE_UNKNOWN);
-	}
-}
-
 static int
 sysctl_vm_object_list(SYSCTL_HANDLER_ARGS)
 {

sys/vm/vm_pager.c

@@ -79,6 +79,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/ucred.h>
 #include <sys/malloc.h>
 #include <sys/rwlock.h>
+#include <sys/user.h>
 
 #include <vm/vm.h>
 #include <vm/vm_param.h>
@@ -155,6 +156,7 @@ dead_pager_getvp(vm_object_t object, struct vnode **vpp, bool *vp_heldp)
 }
 
 static const struct pagerops deadpagerops = {
+	.pgo_kvme_type = KVME_TYPE_DEAD,
 	.pgo_alloc = 	dead_pager_alloc,
 	.pgo_dealloc =	dead_pager_dealloc,
 	.pgo_getpages =	dead_pager_getpages,
@@ -530,3 +532,17 @@ vm_object_mightbedirty(vm_object_t object)
 		return (false);
 	return (method(object));
 }
+
+/*
+ * Return the kvme type of the given object.
+ * If vpp is not NULL, set it to the object's vm_object_vnode() or NULL.
+ */
+int
+vm_object_kvme_type(vm_object_t object, struct vnode **vpp)
+{
+	VM_OBJECT_ASSERT_LOCKED(object);
+
+	if (vpp != NULL)
+		*vpp = vm_object_vnode(object);
+	return (pagertab[object->type]->pgo_kvme_type);
+}

sys/vm/vm_pager.h

@@ -71,6 +71,7 @@ typedef void pgo_freespace_t(vm_object_t object, vm_pindex_t start,
     vm_size_t size);
 
 struct pagerops {
+	int			pgo_kvme_type;
 	pgo_init_t		*pgo_init;		/* Initialize pager. */
 	pgo_alloc_t		*pgo_alloc;		/* Allocate pager. */
 	pgo_dealloc_t		*pgo_dealloc;		/* Disassociate. */

sys/vm/vnode_pager.c

@@ -74,6 +74,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/rwlock.h>
 #include <sys/sf_buf.h>
 #include <sys/domainset.h>
+#include <sys/user.h>
 
 #include <machine/atomic.h>
 
@@ -108,6 +109,7 @@ static void vnode_pager_release_writecount(vm_object_t, vm_offset_t,
 static void vnode_pager_getvp(vm_object_t, struct vnode **, bool *);
 
 const struct pagerops vnodepagerops = {
+	.pgo_kvme_type = KVME_TYPE_VNODE,
 	.pgo_alloc =	vnode_pager_alloc,
 	.pgo_dealloc =	vnode_pager_dealloc,
 	.pgo_getpages =	vnode_pager_getpages,