OpenZFS 7431 - ZFS Channel Programs

Authored by: Chris Williamson <[email protected]>
Reviewed by: Matthew Ahrens <[email protected]>
Reviewed by: George Wilson <[email protected]>
Reviewed by: John Kennedy <[email protected]>
Reviewed by: Dan Kimmel <[email protected]>
Approved by: Garrett D'Amore <[email protected]>
Ported-by: Don Brady <[email protected]>
Ported-by: John Kennedy <[email protected]>

OpenZFS-issue: https://www.illumos.org/issues/7431
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/dfc11533

Porting Notes:
* The CLI long option arguments for '-t' and '-m' don't parse on linux
* Switched from kmem_alloc to vmem_alloc in zcp_lua_alloc
* Lua implementation is built as its own module (zlua.ko)
* Lua headers consumed directly by zfs code moved to 'include/sys/lua/'
* There is no native setjmp/longjump available in stock Linux kernel.
  Brought over implementations from illumos and FreeBSD
* The get_temporary_prop() was adapted due to VFS platform differences
* Use of inline functions in lua parser to reduce stack usage per C call
* Skip some ZFS Test Suite ZCP tests on sparc64 to avoid stack overflow

1 files changed, 27 insertions, 1 deletions

diff --git a/include/sys/fs/zfs.h b/include/sys/fs/zfs.h
index 611279d6b..480cecac9 100644
--- a/include/sys/fs/zfs.h
+++ b/include/sys/fs/zfs.h
@@ -21,7 +21,7 @@
 
 /*
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2011, 2014 by Delphix. All rights reserved.
+ * Copyright (c) 2011, 2016 by Delphix. All rights reserved.
  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  * Copyright (c) 2013, 2017 Joyent, Inc. All rights reserved.
  * Copyright (c) 2014 Integros [integros.com]
@@ -281,11 +281,17 @@ typedef int (*zprop_func)(int, void *);
 #define	ZPOOL_ROOTFS_PROPS	"root-props-nvl"
 
 /*
+ * Length of 'written@' and 'written#'
+ */
+#define	ZFS_WRITTEN_PROP_PREFIX_LEN	8
+
+/*
  * Dataset property functions shared between libzfs and kernel.
  */
 const char *zfs_prop_default_string(zfs_prop_t);
 uint64_t zfs_prop_default_numeric(zfs_prop_t);
 boolean_t zfs_prop_readonly(zfs_prop_t);
+boolean_t zfs_prop_visible(zfs_prop_t prop);
 boolean_t zfs_prop_inheritable(zfs_prop_t);
 boolean_t zfs_prop_setonce(zfs_prop_t);
 boolean_t zfs_prop_encryption_key_param(zfs_prop_t);
@@ -1095,6 +1101,7 @@ typedef enum zfs_ioc {
 	ZFS_IOC_BOOKMARK,
 	ZFS_IOC_GET_BOOKMARKS,
 	ZFS_IOC_DESTROY_BOOKMARKS,
+	ZFS_IOC_CHANNEL_PROGRAM,
 	ZFS_IOC_RECV_NEW,
 	ZFS_IOC_POOL_SYNC,
 	ZFS_IOC_LOAD_KEY,
@@ -1163,6 +1170,7 @@ typedef enum {
 #define	ZPOOL_HIST_OUTPUT_NVL	"out_nvl"
 #define	ZPOOL_HIST_DSNAME	"dsname"
 #define	ZPOOL_HIST_DSID		"dsid"
+#define	ZPOOL_HIST_ERRNO	"errno"
 
 /*
  * Special nvlist name that will not have its args recorded in the pool's
@@ -1192,6 +1200,24 @@ typedef enum {
 #define	ZFS_IMPORT_LOAD_KEYS	0x40
 
 /*
+ * Channel program argument/return nvlist keys and defaults.
+ */
+#define	ZCP_ARG_PROGRAM		"program"
+#define	ZCP_ARG_ARGLIST		"arg"
+#define	ZCP_ARG_INSTRLIMIT	"instrlimit"
+#define	ZCP_ARG_MEMLIMIT	"memlimit"
+
+#define	ZCP_ARG_CLIARGV		"argv"
+
+#define	ZCP_RET_ERROR		"error"
+#define	ZCP_RET_RETURN		"return"
+
+#define	ZCP_DEFAULT_INSTRLIMIT	(10 * 1000 * 1000)
+#define	ZCP_MAX_INSTRLIMIT	(10 * ZCP_DEFAULT_INSTRLIMIT)
+#define	ZCP_DEFAULT_MEMLIMIT	(10 * 1024 * 1024)
+#define	ZCP_MAX_MEMLIMIT	(10 * ZCP_DEFAULT_MEMLIMIT)
+
+/*
  * Sysevent payload members.  ZFS will generate the following sysevents with the
  * given payloads:
  *