log.h revision 747cfc73193da6c99aeb06f23e70552319393cc4
/*
* 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 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
#ifndef _SYS_LOG_H
#define _SYS_LOG_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <sys/strlog.h>
#include <sys/stream.h>
#ifdef __cplusplus
extern "C" {
#endif
#define LOG_CONSMIN 0 /* /dev/conslog minor */
#define LOG_LOGMIN 5 /* /dev/log minor */
#define LOG_BACKLOG LOG_LOGMIN /* console backlog queue */
#define LOG_LOGMINIDX 0 /* index of smallest /dev/log clone */
#define LOG_LOGMAXIDX 15 /* up to 16 /dev/log clones */
#define LOG_NUMCLONES (LOG_LOGMAXIDX - LOG_LOGMINIDX + 1)
#define LOG_MID 44 /* module ID */
#define LOG_MINPS 0 /* min packet size */
#define LOG_MAXPS 1024 /* max packet size */
#define LOG_LOWAT 2048 /* threshold for backenable */
#define LOG_HIWAT 1048576 /* threshold for tossing messages */
#define LOG_MAGIC 0xf00d4109U /* "food for log" - unsent msg magic */
#define LOG_RECENTSIZE 8192 /* queue of most recent messages */
#define LOG_MINFREE 4096 /* message cache low water mark */
#define LOG_MAXFREE 8192 /* message cache high water mark */
typedef struct log log_t;
typedef int (log_filter_t)(log_t *, log_ctl_t *);
struct log {
queue_t *log_q; /* message queue */
log_filter_t *log_wanted; /* message filter */
mblk_t *log_data; /* parameters for filter */
uint16_t log_flags; /* message type (e.g. SL_CONSOLE) */
short log_inuse; /* is this log device open? */
int log_overflow; /* messages lost due to QFULL */
zoneid_t log_zoneid; /* zone id of log */
major_t log_major; /* device type */
minor_t log_minor; /* minor number of associated device */
};
/* Array of /dev/log minor devices */
typedef struct log_zone {
log_t lz_clones[LOG_NUMCLONES];
uint16_t lz_active; /* active types (OR of all log_flags fields) */
} log_zone_t;
#define LOG_MSGSIZE 200
typedef struct log_dump {
uint32_t ld_magic; /* LOG_MAGIC */
uint32_t ld_msgsize; /* MBLKL(mp->b_cont) */
uint32_t ld_csum; /* checksum32(log_ctl) */
uint32_t ld_msum; /* checksum32(message text) */
/*
* log_ctl and message text follow here -- see dump_messages()
*/
} log_dump_t;
#ifdef _KERNEL
/* global zone variables */
extern log_zone_t log_global;
extern queue_t *log_consq; /* primary console reader queue */
extern queue_t *log_backlogq; /* console backlog queue */
extern queue_t *log_intrq; /* pending high-level interrupt message queue */
extern log_filter_t log_error;
extern log_filter_t log_trace;
extern log_filter_t log_console;
extern void log_init(void);
extern void log_enter(void);
extern void log_exit(void);
extern void log_update(log_t *, queue_t *, short, log_filter_t);
extern mblk_t *log_makemsg(int, int, int, int, int, void *, size_t, int);
extern void log_freemsg(mblk_t *);
extern void log_sendmsg(mblk_t *, zoneid_t);
extern void log_flushq(queue_t *);
extern void log_printq(queue_t *);
extern log_t *log_alloc(minor_t);
extern void log_free(log_t *);
extern void log_flushall();
#endif /* _KERNEL */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_LOG_H */