478 lines
13 KiB
C
478 lines
13 KiB
C
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#ifndef _SYS_MODCTL_H
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#define _SYS_MODCTL_H
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/*
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* loadable module support.
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*/
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#include <sys/zfs_context.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct modlmisc;
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struct modlinkage;
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/*
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* The following structure defines the operations used by modctl
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* to load and unload modules. Each supported loadable module type
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* requires a set of mod_ops.
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*/
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struct mod_ops {
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int (*modm_install)(struct modlmisc *, struct modlinkage *);
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int (*modm_remove)(struct modlmisc *, struct modlinkage *);
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int (*modm_info)(void *, struct modlinkage *, int *);
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};
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/*
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* The defined set of mod_ops structures for each loadable module type
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* Defined in modctl.c
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*/
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extern struct mod_ops mod_brandops;
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#if defined(__i386) || defined(__amd64)
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extern struct mod_ops mod_cpuops;
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#endif
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extern struct mod_ops mod_cryptoops;
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extern struct mod_ops mod_driverops;
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extern struct mod_ops mod_execops;
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extern struct mod_ops mod_fsops;
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extern struct mod_ops mod_miscops;
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extern struct mod_ops mod_schedops;
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extern struct mod_ops mod_strmodops;
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extern struct mod_ops mod_syscallops;
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extern struct mod_ops mod_sockmodops;
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#ifdef _SYSCALL32_IMPL
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extern struct mod_ops mod_syscallops32;
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#endif
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extern struct mod_ops mod_dacfops;
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extern struct mod_ops mod_ippops;
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extern struct mod_ops mod_pcbeops;
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extern struct mod_ops mod_devfsops;
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extern struct mod_ops mod_kiconvops;
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/*
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* Definitions for the module specific linkage structures.
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* The first two fields are the same in all of the structures.
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* The linkinfo is for informational purposes only and is returned by
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* modctl with the MODINFO cmd.
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*/
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/* For cryptographic providers */
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struct modlcrypto {
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struct mod_ops *crypto_modops;
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char *crypto_linkinfo;
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};
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/* For misc */
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struct modlmisc {
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struct mod_ops *misc_modops;
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char *misc_linkinfo;
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};
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/*
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* Revision number of loadable modules support. This is the value
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* that must be used in the modlinkage structure.
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*/
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#define MODREV_1 1
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/*
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* The modlinkage structure is the structure that the module writer
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* provides to the routines to install, remove, and stat a module.
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* The ml_linkage element is an array of pointers to linkage structures.
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* For most modules there is only one linkage structure. We allocate
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* enough space for 3 linkage structures which happens to be the most
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* we have in any sun supplied module. For those modules with more
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* than 3 linkage structures (which is very unlikely), a modlinkage
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* structure must be kmem_alloc'd in the module wrapper to be big enough
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* for all of the linkage structures.
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*/
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struct modlinkage {
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int ml_rev; /* rev of loadable modules system */
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#ifdef _LP64
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void *ml_linkage[7]; /* more space in 64-bit OS */
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#else
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void *ml_linkage[4]; /* NULL terminated list of */
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/* linkage structures */
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#endif
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};
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/*
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* commands. These are the commands supported by the modctl system call.
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*/
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#define MODLOAD 0
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#define MODUNLOAD 1
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#define MODINFO 2
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#define MODRESERVED 3
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#define MODSETMINIROOT 4
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#define MODADDMAJBIND 5
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#define MODGETPATH 6
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#define MODREADSYSBIND 7
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#define MODGETMAJBIND 8
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#define MODGETNAME 9
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#define MODSIZEOF_DEVID 10
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#define MODGETDEVID 11
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#define MODSIZEOF_MINORNAME 12
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#define MODGETMINORNAME 13
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#define MODGETPATHLEN 14
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#define MODEVENTS 15
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#define MODGETFBNAME 16
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#define MODREREADDACF 17
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#define MODLOADDRVCONF 18
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#define MODUNLOADDRVCONF 19
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#define MODREMMAJBIND 20
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#define MODDEVT2INSTANCE 21
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#define MODGETDEVFSPATH_LEN 22
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#define MODGETDEVFSPATH 23
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#define MODDEVID2PATHS 24
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#define MODSETDEVPOLICY 26
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#define MODGETDEVPOLICY 27
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#define MODALLOCPRIV 28
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#define MODGETDEVPOLICYBYNAME 29
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#define MODLOADMINORPERM 31
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#define MODADDMINORPERM 32
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#define MODREMMINORPERM 33
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#define MODREMDRVCLEANUP 34
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#define MODDEVEXISTS 35
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#define MODDEVREADDIR 36
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#define MODDEVNAME 37
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#define MODGETDEVFSPATH_MI_LEN 38
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#define MODGETDEVFSPATH_MI 39
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#define MODRETIRE 40
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#define MODUNRETIRE 41
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#define MODISRETIRED 42
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#define MODDEVEMPTYDIR 43
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#define MODREMDRVALIAS 44
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/*
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* sub cmds for MODEVENTS
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*/
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#define MODEVENTS_FLUSH 0
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#define MODEVENTS_FLUSH_DUMP 1
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#define MODEVENTS_SET_DOOR_UPCALL_FILENAME 2
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#define MODEVENTS_GETDATA 3
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#define MODEVENTS_FREEDATA 4
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#define MODEVENTS_POST_EVENT 5
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#define MODEVENTS_REGISTER_EVENT 6
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/*
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* devname subcmds for MODDEVNAME
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*/
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#define MODDEVNAME_LOOKUPDOOR 0
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#define MODDEVNAME_DEVFSADMNODE 1
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#define MODDEVNAME_NSMAPS 2
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#define MODDEVNAME_PROFILE 3
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#define MODDEVNAME_RECONFIG 4
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#define MODDEVNAME_SYSAVAIL 5
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/*
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* Data structure passed to modconfig command in kernel to build devfs tree
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*/
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struct aliases {
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struct aliases *a_next;
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char *a_name;
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int a_len;
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};
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#define MAXMODCONFNAME 256
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struct modconfig {
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char drvname[MAXMODCONFNAME];
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char drvclass[MAXMODCONFNAME];
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int major;
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int flags;
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int num_aliases;
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struct aliases *ap;
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};
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#if defined(_SYSCALL32)
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struct aliases32 {
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caddr32_t a_next;
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caddr32_t a_name;
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int32_t a_len;
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};
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struct modconfig32 {
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char drvname[MAXMODCONFNAME];
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char drvclass[MAXMODCONFNAME];
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int32_t major;
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int32_t flags;
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int32_t num_aliases;
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caddr32_t ap;
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};
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#endif /* _SYSCALL32 */
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/* flags for modconfig */
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#define MOD_UNBIND_OVERRIDE 0x01 /* fail unbind if in use */
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/*
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* Max module path length
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*/
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#define MOD_MAXPATH 256
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/*
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* Default search path for modules ADDITIONAL to the directory
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* where the kernel components we booted from are.
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*
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* Most often, this will be "/platform/{platform}/kernel /kernel /usr/kernel",
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* but we don't wire it down here.
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*/
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#define MOD_DEFPATH "/kernel /usr/kernel"
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/*
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* Default file name extension for autoloading modules.
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*/
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#define MOD_DEFEXT ""
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/*
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* Parameters for modinfo
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*/
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#define MODMAXNAMELEN 32 /* max module name length */
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#define MODMAXLINKINFOLEN 32 /* max link info length */
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/*
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* Module specific information.
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*/
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struct modspecific_info {
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char msi_linkinfo[MODMAXLINKINFOLEN]; /* name in linkage struct */
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int msi_p0; /* module specific information */
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};
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/*
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* Structure returned by modctl with MODINFO command.
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*/
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#define MODMAXLINK 10 /* max linkages modinfo can handle */
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struct modinfo {
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int mi_info; /* Flags for info wanted */
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int mi_state; /* Flags for module state */
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int mi_id; /* id of this loaded module */
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int mi_nextid; /* id of next module or -1 */
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caddr_t mi_base; /* virtual addr of text */
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size_t mi_size; /* size of module in bytes */
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int mi_rev; /* loadable modules rev */
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int mi_loadcnt; /* # of times loaded */
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char mi_name[MODMAXNAMELEN]; /* name of module */
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struct modspecific_info mi_msinfo[MODMAXLINK];
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/* mod specific info */
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};
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#if defined(_SYSCALL32)
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#define MODMAXNAMELEN32 32 /* max module name length */
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#define MODMAXLINKINFOLEN32 32 /* max link info length */
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#define MODMAXLINK32 10 /* max linkages modinfo can handle */
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struct modspecific_info32 {
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char msi_linkinfo[MODMAXLINKINFOLEN32]; /* name in linkage struct */
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int32_t msi_p0; /* module specific information */
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};
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struct modinfo32 {
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int32_t mi_info; /* Flags for info wanted */
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int32_t mi_state; /* Flags for module state */
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int32_t mi_id; /* id of this loaded module */
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int32_t mi_nextid; /* id of next module or -1 */
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caddr32_t mi_base; /* virtual addr of text */
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uint32_t mi_size; /* size of module in bytes */
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int32_t mi_rev; /* loadable modules rev */
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int32_t mi_loadcnt; /* # of times loaded */
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char mi_name[MODMAXNAMELEN32]; /* name of module */
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struct modspecific_info32 mi_msinfo[MODMAXLINK32];
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/* mod specific info */
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};
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#endif /* _SYSCALL32 */
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/* Values for mi_info flags */
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#define MI_INFO_ONE 1
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#define MI_INFO_ALL 2
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#define MI_INFO_CNT 4
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#define MI_INFO_LINKAGE 8 /* used internally to extract modlinkage */
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/*
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* MI_INFO_NOBASE indicates caller does not need mi_base. Failure to use this
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* flag may lead 32-bit apps to receive an EOVERFLOW error from modctl(MODINFO)
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* when used with a 64-bit kernel.
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*/
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#define MI_INFO_NOBASE 16
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/* Values for mi_state */
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#define MI_LOADED 1
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#define MI_INSTALLED 2
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/*
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* Macros to vector to the appropriate module specific routine.
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*/
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#define MODL_INSTALL(MODL, MODLP) \
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(*(MODL)->misc_modops->modm_install)(MODL, MODLP)
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#define MODL_REMOVE(MODL, MODLP) \
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(*(MODL)->misc_modops->modm_remove)(MODL, MODLP)
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#define MODL_INFO(MODL, MODLP, P0) \
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(*(MODL)->misc_modops->modm_info)(MODL, MODLP, P0)
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/*
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* Definitions for stubs
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*/
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struct mod_stub_info {
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uintptr_t mods_func_adr;
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struct mod_modinfo *mods_modinfo;
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uintptr_t mods_stub_adr;
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int (*mods_errfcn)(void);
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int mods_flag; /* flags defined below */
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};
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/*
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* Definitions for mods_flag.
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*/
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#define MODS_WEAK 0x01 /* weak stub (not loaded if called) */
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#define MODS_NOUNLOAD 0x02 /* module not unloadable (no _fini()) */
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#define MODS_INSTALLED 0x10 /* module installed */
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struct mod_modinfo {
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char *modm_module_name;
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struct modctl *mp;
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struct mod_stub_info modm_stubs[1];
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};
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struct modctl_list {
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struct modctl_list *modl_next;
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struct modctl *modl_modp;
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};
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/*
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* Structure to manage a loadable module.
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* Note: the module (mod_mp) structure's "text" and "text_size" information
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* are replicated in the modctl structure so that mod_containing_pc()
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* doesn't have to grab any locks (modctls are persistent; modules are not.)
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*/
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typedef struct modctl {
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struct modctl *mod_next; /* &modules based list */
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struct modctl *mod_prev;
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int mod_id;
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void *mod_mp;
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kthread_t *mod_inprogress_thread;
|
||
|
|
struct mod_modinfo *mod_modinfo;
|
||
|
|
struct modlinkage *mod_linkage;
|
||
|
|
char *mod_filename;
|
||
|
|
char *mod_modname;
|
||
|
|
|
||
|
|
char mod_busy; /* inprogress_thread has locked */
|
||
|
|
char mod_want; /* someone waiting for unlock */
|
||
|
|
char mod_prim; /* primary module */
|
||
|
|
|
||
|
|
int mod_ref; /* ref count - from dependent or stub */
|
||
|
|
|
||
|
|
char mod_loaded; /* module in memory */
|
||
|
|
char mod_installed; /* post _init pre _fini */
|
||
|
|
char mod_loadflags;
|
||
|
|
char mod_delay_unload; /* deferred unload */
|
||
|
|
|
||
|
|
struct modctl_list *mod_requisites; /* mods this one depends on. */
|
||
|
|
void *__unused; /* NOTE: reuse (same size) is OK, */
|
||
|
|
/* deletion causes mdb.vs.core issues */
|
||
|
|
int mod_loadcnt; /* number of times mod was loaded */
|
||
|
|
int mod_nenabled; /* # of enabled DTrace probes in mod */
|
||
|
|
char *mod_text;
|
||
|
|
size_t mod_text_size;
|
||
|
|
|
||
|
|
int mod_gencount; /* # times loaded/unloaded */
|
||
|
|
struct modctl *mod_requisite_loading; /* mod circular dependency */
|
||
|
|
} modctl_t;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* mod_loadflags
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define MOD_NOAUTOUNLOAD 0x1 /* Auto mod-unloader skips this mod */
|
||
|
|
#define MOD_NONOTIFY 0x2 /* No krtld notifications on (un)load */
|
||
|
|
#define MOD_NOUNLOAD 0x4 /* Assume EBUSY for all _fini's */
|
||
|
|
|
||
|
|
#define MOD_BIND_HASHSIZE 64
|
||
|
|
#define MOD_BIND_HASHMASK (MOD_BIND_HASHSIZE-1)
|
||
|
|
|
||
|
|
typedef int modid_t;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* global function and data declarations
|
||
|
|
*/
|
||
|
|
extern kmutex_t mod_lock;
|
||
|
|
|
||
|
|
extern char *systemfile;
|
||
|
|
extern char **syscallnames;
|
||
|
|
extern int moddebug;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* this is the head of a doubly linked list. Only the next and prev
|
||
|
|
* pointers are used
|
||
|
|
*/
|
||
|
|
extern modctl_t modules;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Only the following are part of the DDI/DKI
|
||
|
|
*/
|
||
|
|
extern int mod_install(struct modlinkage *);
|
||
|
|
extern int mod_remove(struct modlinkage *);
|
||
|
|
extern int mod_info(struct modlinkage *, struct modinfo *);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* bit definitions for moddebug.
|
||
|
|
*/
|
||
|
|
#define MODDEBUG_LOADMSG 0x80000000 /* print "[un]loading..." msg */
|
||
|
|
#define MODDEBUG_ERRMSG 0x40000000 /* print detailed error msgs */
|
||
|
|
#define MODDEBUG_LOADMSG2 0x20000000 /* print 2nd level msgs */
|
||
|
|
#define MODDEBUG_RETIRE 0x10000000 /* print retire msgs */
|
||
|
|
#define MODDEBUG_BINDING 0x00040000 /* driver/alias binding */
|
||
|
|
#define MODDEBUG_FINI_EBUSY 0x00020000 /* pretend fini returns EBUSY */
|
||
|
|
#define MODDEBUG_NOAUL_IPP 0x00010000 /* no Autounloading ipp mods */
|
||
|
|
#define MODDEBUG_NOAUL_DACF 0x00008000 /* no Autounloading dacf mods */
|
||
|
|
#define MODDEBUG_KEEPTEXT 0x00004000 /* keep text after unloading */
|
||
|
|
#define MODDEBUG_NOAUL_DRV 0x00001000 /* no Autounloading Drivers */
|
||
|
|
#define MODDEBUG_NOAUL_EXEC 0x00000800 /* no Autounloading Execs */
|
||
|
|
#define MODDEBUG_NOAUL_FS 0x00000400 /* no Autounloading File sys */
|
||
|
|
#define MODDEBUG_NOAUL_MISC 0x00000200 /* no Autounloading misc */
|
||
|
|
#define MODDEBUG_NOAUL_SCHED 0x00000100 /* no Autounloading scheds */
|
||
|
|
#define MODDEBUG_NOAUL_STR 0x00000080 /* no Autounloading streams */
|
||
|
|
#define MODDEBUG_NOAUL_SYS 0x00000040 /* no Autounloading syscalls */
|
||
|
|
#define MODDEBUG_NOCTF 0x00000020 /* do not load CTF debug data */
|
||
|
|
#define MODDEBUG_NOAUTOUNLOAD 0x00000010 /* no autounloading at all */
|
||
|
|
#define MODDEBUG_DDI_MOD 0x00000008 /* ddi_mod{open,sym,close} */
|
||
|
|
#define MODDEBUG_MP_MATCH 0x00000004 /* dev_minorperm */
|
||
|
|
#define MODDEBUG_MINORPERM 0x00000002 /* minor perm modctls */
|
||
|
|
#define MODDEBUG_USERDEBUG 0x00000001 /* bpt after init_module() */
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* _SYS_MODCTL_H */
|