Move get_temporary_prop to platform code

Temporary property handling at the VFS layer requires
platform specific code.

Reviewed-by: Sean Eric Fagan <sef@ixsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Jorgen Lundman <lundman@lundman.net>
Signed-off-by: Matt Macy <mmacy@FreeBSD.org>
Closes #9401

include/os/linux/zfs/sys/zfs_vfsops.h

@@ -224,6 +224,8 @@ extern int zfs_statvfs(struct dentry *dentry, struct kstatfs *statp);
 extern int zfs_vget(struct super_block *sb, struct inode **ipp, fid_t *fidp);
 extern int zfs_prune(struct super_block *sb, unsigned long nr_to_scan,
     int *objects);
+extern int zfs_get_temporary_prop(dsl_dataset_t *ds, zfs_prop_t zfs_prop,
+    uint64_t *val, char *setpoint);
 
 #ifdef	__cplusplus
 }

module/os/linux/zfs/zfs_vfsops.c

@@ -533,6 +533,81 @@ unregister:
 	return (error);
 }
 
+/*
+ * Takes a dataset, a property, a value and that value's setpoint as
+ * found in the ZAP. Checks if the property has been changed in the vfs.
+ * If so, val and setpoint will be overwritten with updated content.
+ * Otherwise, they are left unchanged.
+ */
+int
+zfs_get_temporary_prop(dsl_dataset_t *ds, zfs_prop_t zfs_prop, uint64_t *val,
+    char *setpoint)
+{
+	int error;
+	zfsvfs_t *zfvp;
+	vfs_t *vfsp;
+	objset_t *os;
+	uint64_t tmp = *val;
+
+	error = dmu_objset_from_ds(ds, &os);
+	if (error != 0)
+		return (error);
+
+	if (dmu_objset_type(os) != DMU_OST_ZFS)
+		return (EINVAL);
+
+	mutex_enter(&os->os_user_ptr_lock);
+	zfvp = dmu_objset_get_user(os);
+	mutex_exit(&os->os_user_ptr_lock);
+	if (zfvp == NULL)
+		return (ESRCH);
+
+	vfsp = zfvp->z_vfs;
+
+	switch (zfs_prop) {
+	case ZFS_PROP_ATIME:
+		if (vfsp->vfs_do_atime)
+			tmp = vfsp->vfs_atime;
+		break;
+	case ZFS_PROP_RELATIME:
+		if (vfsp->vfs_do_relatime)
+			tmp = vfsp->vfs_relatime;
+		break;
+	case ZFS_PROP_DEVICES:
+		if (vfsp->vfs_do_devices)
+			tmp = vfsp->vfs_devices;
+		break;
+	case ZFS_PROP_EXEC:
+		if (vfsp->vfs_do_exec)
+			tmp = vfsp->vfs_exec;
+		break;
+	case ZFS_PROP_SETUID:
+		if (vfsp->vfs_do_setuid)
+			tmp = vfsp->vfs_setuid;
+		break;
+	case ZFS_PROP_READONLY:
+		if (vfsp->vfs_do_readonly)
+			tmp = vfsp->vfs_readonly;
+		break;
+	case ZFS_PROP_XATTR:
+		if (vfsp->vfs_do_xattr)
+			tmp = vfsp->vfs_xattr;
+		break;
+	case ZFS_PROP_NBMAND:
+		if (vfsp->vfs_do_nbmand)
+			tmp = vfsp->vfs_nbmand;
+		break;
+	default:
+		return (ENOENT);
+	}
+
+	if (tmp != *val) {
+		(void) strcpy(setpoint, "temporary");
+		*val = tmp;
+	}
+	return (0);
+}
+
 static int
 zfs_space_delta_cb(dmu_object_type_t bonustype, void *data,
     uint64_t *userp, uint64_t *groupp, uint64_t *projectp)

module/zfs/zcp_get.c

@@ -212,85 +212,6 @@ get_dsl_dir_prop(dsl_dataset_t *ds, zfs_prop_t zfs_prop,
 	return (0);
 }
 
-/*
- * Takes a dataset, a property, a value and that value's setpoint as
- * found in the ZAP. Checks if the property has been changed in the vfs.
- * If so, val and setpoint will be overwritten with updated content.
- * Otherwise, they are left unchanged.
- */
-static int
-get_temporary_prop(dsl_dataset_t *ds, zfs_prop_t zfs_prop, uint64_t *val,
-    char *setpoint)
-{
-#if	!defined(_KERNEL)
-	return (0);
-#else
-	int error;
-	zfsvfs_t *zfvp;
-	vfs_t *vfsp;
-	objset_t *os;
-	uint64_t tmp = *val;
-
-	error = dmu_objset_from_ds(ds, &os);
-	if (error != 0)
-		return (error);
-
-	if (dmu_objset_type(os) != DMU_OST_ZFS)
-		return (EINVAL);
-
-	mutex_enter(&os->os_user_ptr_lock);
-	zfvp = dmu_objset_get_user(os);
-	mutex_exit(&os->os_user_ptr_lock);
-	if (zfvp == NULL)
-		return (ESRCH);
-
-	vfsp = zfvp->z_vfs;
-
-	switch (zfs_prop) {
-	case ZFS_PROP_ATIME:
-		if (vfsp->vfs_do_atime)
-			tmp = vfsp->vfs_atime;
-		break;
-	case ZFS_PROP_RELATIME:
-		if (vfsp->vfs_do_relatime)
-			tmp = vfsp->vfs_relatime;
-		break;
-	case ZFS_PROP_DEVICES:
-		if (vfsp->vfs_do_devices)
-			tmp = vfsp->vfs_devices;
-		break;
-	case ZFS_PROP_EXEC:
-		if (vfsp->vfs_do_exec)
-			tmp = vfsp->vfs_exec;
-		break;
-	case ZFS_PROP_SETUID:
-		if (vfsp->vfs_do_setuid)
-			tmp = vfsp->vfs_setuid;
-		break;
-	case ZFS_PROP_READONLY:
-		if (vfsp->vfs_do_readonly)
-			tmp = vfsp->vfs_readonly;
-		break;
-	case ZFS_PROP_XATTR:
-		if (vfsp->vfs_do_xattr)
-			tmp = vfsp->vfs_xattr;
-		break;
-	case ZFS_PROP_NBMAND:
-		if (vfsp->vfs_do_nbmand)
-			tmp = vfsp->vfs_nbmand;
-		break;
-	default:
-		return (ENOENT);
-	}
-
-	if (tmp != *val) {
-		(void) strcpy(setpoint, "temporary");
-		*val = tmp;
-	}
-	return (0);
-#endif
-}
-
 /*
  * Check if the property we're looking for is stored at the dsl_dataset or
  * dsl_dir level. If so, push the property value and source onto the lua stack
@@ -547,9 +468,14 @@ get_zap_prop(lua_State *state, dsl_dataset_t *ds, zfs_prop_t zfs_prop)
 		error = dsl_prop_get_ds(ds, prop_name, sizeof (numval),
 		    1, &numval, setpoint);
 
+#ifdef _KERNEL
 		/* Fill in temporary value for prop, if applicable */
-		(void) get_temporary_prop(ds, zfs_prop, &numval, setpoint);
+		(void) zfs_get_temporary_prop(ds, zfs_prop, &numval, setpoint);
-
+#else
+		return (luaL_error(state,
+		    "temporary properties only supported in kernel mode",
+		    prop_name));
+#endif
 		/* Push value to lua stack */
 		if (prop_type == PROP_TYPE_INDEX) {
 			const char *propval;