1 files changed, 46 insertions, 13 deletions

diff --git a/usr/src/uts/common/sys/hook.h b/usr/src/uts/common/sys/hook.h
index 00b0048093..464f2b8b50 100644
--- a/usr/src/uts/common/sys/hook.h
+++ b/usr/src/uts/common/sys/hook.h
@@ -19,7 +19,7 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
@@ -30,8 +30,6 @@
 #ifndef _SYS_HOOK_H
 #define	_SYS_HOOK_H
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 #include <sys/queue.h>
 #include <sys/netstack.h>
 
@@ -49,33 +47,62 @@ typedef uintptr_t hook_data_t;
 
 struct hook_event_int;
 typedef struct hook_event_int *hook_event_token_t;
+struct hook_int;
+typedef struct hook_int *hook_token_t;
+
+typedef int (* hook_func_t)(hook_event_token_t, hook_data_t, void *);
+
+/*
+ * A hook_notify_cmd_t is given as an argument to functions called as part of
+ * the notify callbacks that have been registered firing.
+ */
+typedef enum hook_notify_cmd_e {
+	HN_NONE = 0,
+	HN_REGISTER = 1,
+	HN_UNREGISTER = 2
+} hook_notify_cmd_t;
 
-typedef int (* hook_func_t)(hook_event_token_t, hook_data_t, netstack_t *);
+/*
+ *
+ */
+typedef enum hook_hint_e {
+	HH_NONE = 0,
+	HH_FIRST,
+	HH_LAST,
+	HH_BEFORE,
+	HH_AFTER
+} hook_hint_t;
 
 /*
  * Hook
  */
-typedef struct hook {
-	int32_t		h_version;	/* version number */
+typedef struct hook_s {
+	int		h_version;
 	hook_func_t	h_func;		/* callback func */
 	char		*h_name;	/* name of this hook */
-	int		h_flags;	/* extra hook properties */
+	uint_t		h_flags;	/* extra hook properties */
+	hook_hint_t	h_hint;		/* What type of hint is hintvalue */
+	uintptr_t	h_hintvalue;
+	void		*h_arg;		/* value to pass back into the hook */
 } hook_t;
 
-#define	HOOK_INIT(x, fn, r)			\
+#define	HOOK_INIT(x, fn, r, a)		\
 	do {					\
-		(x)->h_version = HOOK_VERSION;	\
+		(x) = hook_alloc(HOOK_VERSION);	\
 		(x)->h_func = (fn);		\
 		(x)->h_name = (r);		\
 		(x)->h_flags = 0;		\
+		(x)->h_hint = HH_NONE;		\
+		(x)->h_hintvalue = 0;		\
+		(x)->h_arg = (a);		\
 		_NOTE(CONSTCOND)		\
 	} while (0)
 
 /*
  * Family
  */
-typedef struct hook_family {
-	int32_t		hf_version;	/* version number */
+typedef struct hook_family_s {
+	int		hf_version;	/* version number */
 	char		*hf_name;	/* family name */
 } hook_family_t;
 
@@ -89,8 +116,8 @@ typedef struct hook_family {
 /*
  * Event
  */
-typedef struct hook_event {
-	int32_t		he_version;	/* version number */
+typedef struct hook_event_s {
+	int		he_version;
 	char		*he_name;	/* name of this hook list */
 	int		he_flags;	/* 1 = multiple entries allowed */
 	boolean_t	he_interested;	/* true if callback exist */
@@ -108,6 +135,12 @@ typedef struct hook_event {
 		_NOTE(CONSTCOND)		\
 	} while (0)
 
+typedef int (* hook_notify_fn_t)(hook_notify_cmd_t, void *, const char *,
+    const char *, const char *);
+
+extern	hook_t		*hook_alloc(const int version);
+extern	void		hook_free(hook_t *);
+
 #ifdef	__cplusplus
 }
 #endif