Bring over illumos ZFS FMA logic -- phase 1

This first phase brings over the ZFS SLM module, zfs_mod.c, to handle
auto operations in response to disk events. Disk event monitoring is
provided from libudev and generates the expected payload schema for
zfs_mod. This work leverages the recently added devid and phys_path
strings in the vdev label.

Signed-off-by: Brian Behlendorf <[email protected]>
Signed-off-by: Don Brady <[email protected]>
Signed-off-by: Tony Hutter <[email protected]>
Closes #4673

2 files changed, 263 insertions, 1 deletions

diff --git a/include/sys/sysevent/Makefile.am b/include/sys/sysevent/Makefile.am
index 0d29eeb80..e9af2684f 100644
--- a/include/sys/sysevent/Makefile.am
+++ b/include/sys/sysevent/Makefile.am
@@ -1,5 +1,6 @@
 COMMON_H = \
-	$(top_srcdir)/include/sys/sysevent/eventdefs.h
+	$(top_srcdir)/include/sys/sysevent/eventdefs.h \
+	$(top_srcdir)/include/sys/sysevent/dev.h
 
 KERNEL_H =
 
diff --git a/include/sys/sysevent/dev.h b/include/sys/sysevent/dev.h
new file mode 100644
index 000000000..1117538d8
--- /dev/null
+++ b/include/sys/sysevent/dev.h
@@ -0,0 +1,261 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_SYS_SYSEVENT_DEV_H
+#define	_SYS_SYSEVENT_DEV_H
+
+#include <sys/sysevent/eventdefs.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Event schema for EC_DEV_ADD/ESC_DISK
+ *
+ *	Event Class 	- EC_DEV_ADD
+ *	Event Sub-Class - ESC_DISK
+ *
+ *	Attribute Name	- EV_VERSION
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- event version number
+ *
+ *	Attribute Name	- DEV_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- /dev name to the raw device.
+ *			  The name does not include the slice number component.
+ *
+ *	Attribute Name	- DEV_PHYS_PATH
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- physical path of the device without the "/devices"
+ *			  prefix.
+ *
+ *	Attribute Name	- DEV_DRIVER_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- driver name
+ *
+ *	Attribute Name	- DEV_INSTANCE
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- driver instance number
+ *
+ *	Attribute Name	- DEV_PROP_PREFIX<devinfo_node_property>
+ *	Attribute Type	- data type of the devinfo_node_property
+ *	Attribute Value	- value of the devinfo_node_property
+ *
+ *
+ * Event schema for EC_DEV_ADD/ESC_NETWORK
+ *
+ *	Event Class 	- EC_DEV_ADD
+ *	Event Sub-Class - ESC_NETWORK
+ *
+ *	Attribute Name	- EV_VERSION
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- event version number
+ *
+ *	Attribute Name	- DEV_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- /dev name associated with the device if exists.
+ *			  /dev name associated with the driver for DLPI
+ *			  Style-2 only drivers.
+ *
+ *	Attribute Name	- DEV_PHYS_PATH
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- physical path of the device without the "/devices"
+ *			  prefix.
+ *
+ *	Attribute Name	- DEV_DRIVER_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- driver name
+ *
+ *	Attribute Name	- DEV_INSTANCE
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- driver instance number
+ *
+ *	Attribute Name	- DEV_PROP_PREFIX<devinfo_node_property>
+ *	Attribute Type	- data type of the devinfo_node_property
+ *	Attribute Value	- value of the devinfo_node_property
+ *
+ *
+ * Event schema for EC_DEV_ADD/ESC_PRINTER
+ *
+ *	Event Class 	- EC_DEV_ADD
+ *	Event Sub-Class - ESC_PRINTER
+ *
+ *	Attribute Name	- EV_VERSION
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- event version number
+ *
+ *	Attribute Name	- DEV_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- /dev/printers name associated with the device
+ *			  if exists.
+ *			  /dev name associated with the device if it exists
+ *
+ *	Attribute Name	- DEV_PHYS_PATH
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- physical path of the device without the "/devices"
+ *			  prefix.
+ *
+ *	Attribute Name	- DEV_DRIVER_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- driver name
+ *
+ *	Attribute Name	- DEV_INSTANCE
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- driver instance number
+ *
+ *	Attribute Name	- DEV_PROP_PREFIX<devinfo_node_property>
+ *	Attribute Type	- data type of the devinfo_node_property
+ *	Attribute Value	- value of the devinfo_node_property
+ *
+ *
+ * Event schema for EC_DEV_REMOVE/ESC_DISK
+ *
+ *	Event Class 	- EC_DEV_REMOVE
+ *	Event Sub-Class - ESC_DISK
+ *
+ *	Attribute Name	- EV_VERSION
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- event version number
+ *
+ *	Attribute Name	- DEV_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- /dev name to the raw device.
+ *			  The name does not include the slice number component.
+ *
+ *	Attribute Name	- DEV_PHYS_PATH
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- physical path of the device without the "/devices"
+ *			  prefix.
+ *
+ *	Attribute Name	- DEV_DRIVER_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- driver name
+ *
+ *	Attribute Name	- DEV_INSTANCE
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- driver instance number
+ *
+ *
+ * Event schema for EC_DEV_REMOVE/ESC_NETWORK
+ *
+ *	Event Class 	- EC_DEV_REMOVE
+ *	Event Sub-Class - ESC_NETWORK
+ *
+ *	Attribute Name	- EV_VERSION
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- event version number
+ *
+ *	Attribute Name	- DEV_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- /dev name associated with the device if exists.
+ *			  /dev name associated with the driver for DLPI
+ *			  Style-2 only drivers.
+ *
+ *	Attribute Name	- DEV_PHYS_PATH
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- physical path of the device without the "/devices"
+ *			  prefix.
+ *
+ *	Attribute Name	- DEV_DRIVER_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- driver name
+ *
+ *	Attribute Name	- DEV_INSTANCE
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- driver instance number
+ *
+ *
+ * Event schema for EC_DEV_REMOVE/ESC_PRINTER
+ *
+ *	Event Class 	- EC_DEV_REMOVE
+ *	Event Sub-Class - ESC_PRINTER
+ *
+ *	Attribute Name	- EV_VERSION
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- event version number
+ *
+ *	Attribute Name	- DEV_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- /dev/printers name associated with the device
+ *			  if exists.
+ *			  /dev name associated with the device if it exists
+ *
+ *	Attribute Name	- DEV_PHYS_PATH
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- physical path of the device without the "/devices"
+ *			  prefix.
+ *
+ *	Attribute Name	- DEV_DRIVER_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- driver name
+ *
+ *	Attribute Name	- DEV_INSTANCE
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- driver instance number
+ *
+ *
+ * Event schema for EC_DEV_BRANCH/ESC_DEV_BRANCH_ADD or ESC_DEV_BRANCH_REMOVE
+ *
+ *	Event Class 	- EC_DEV_BRANCH
+ *	Event Sub-Class - ESC_DEV_BRANCH_ADD or ESC_DEV_BRANCH_REMOVE
+ *
+ *	Attribute Name	- EV_VERSION
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- event version number
+ *
+ *	Attribute Name	- DEV_PHYS_PATH
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- physical path to the root node of the device subtree
+ *			  without the "/devices" prefix.
+ */
+
+#define	EV_VERSION		"version"
+#define	DEV_PHYS_PATH		"phys_path"
+#define	DEV_NAME		"dev_name"
+#define	DEV_DRIVER_NAME		"driver_name"
+#define	DEV_INSTANCE		"instance"
+#define	DEV_PROP_PREFIX		"prop-"
+
+#ifdef __linux__
+#define	DEV_IDENTIFIER		"devid"
+#define	DEV_PATH		"path"
+#define	DEV_IS_PART		"is_slice"
+#define	DEV_SIZE		"dev_size"
+#endif /* __linux__ */
+
+#define	EV_V1			1
+
+/* maximum number of devinfo node properties added to the event */
+#define	MAX_PROP_COUNT		100
+
+/* only properties with size less than PROP_LEN_LIMIT are added to the event */
+#define	PROP_LEN_LIMIT		1024
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_SYSEVENT_DEV_H */