usr/src/uts/common/io/rsm/rsmka_util.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <sys/types.h>
  30 #include <sys/param.h>
  31 #include <sys/user.h>
  32 #include <sys/buf.h>
  33 #include <sys/systm.h>
  34 #include <sys/vm.h>
  35 #include <sys/uio.h>
  36 #include <vm/seg.h>
  37 #include <sys/stat.h>
  38
  39 #include <sys/time.h>
  40 #include <sys/varargs.h>
  41
  42 #include <sys/rsm/rsm.h>
  43
  44 /* lint -w2 */
  45
  46 extern char *vsprintf_len(size_t, char *, const char *, va_list);
  47 extern char *sprintf(char *buf, const char *fmt, ...);
  48
  49 /*
  50  * From kmdb, read printfs using : *rsmka_dbg/s
  51  */
  52 #define RSMKA_BUFSIZE   0x10000
  53
  54 char    rsmka_buf[RSMKA_BUFSIZE];
  55 char    *rsmka_dbg = rsmka_buf;
  56 char    *rsmka_buf_end = rsmka_buf;
  57 char    *rsmka_buf_top = rsmka_buf + RSMKA_BUFSIZE - 256;
  58 kmutex_t rsmka_buf_lock;
  59
  60 int rsmdbg_category = RSM_KERNEL_ALL;
  61 #ifdef DEBUG
  62 int rsmdbg_level = RSM_DEBUG_VERBOSE;
  63 #else
  64 int rsmdbg_level = RSM_NOTICE;
  65 #endif
  66
  67 void dbprintf(char *fmt, ...) {
  68         va_list ap;
  69 /* lint -save -e40 */
  70         va_start(ap, fmt);
  71 /* lint -restore */
  72         mutex_enter(&rsmka_buf_lock);
  73         (void) vsprintf_len(255, rsmka_buf_end, fmt, ap);
  74         rsmka_buf_end += strlen(rsmka_buf_end);
  75         if (rsmka_buf_end > rsmka_buf_top) {
  76                 rsmka_buf_end = rsmka_buf;
  77         }
  78         va_end(ap);
  79         mutex_exit(&rsmka_buf_lock);
  80 }
  81
  82 void
  83 dbg_printf(int msg_category, int msg_level, char *fmt, ...)
  84 {
  85         if ((msg_category & rsmdbg_category) &&
  86             (msg_level <= rsmdbg_level)) {
  87                 va_list ap;
  88                 va_start(ap, fmt);
  89                 mutex_enter(&rsmka_buf_lock);
  90                 (void) sprintf(rsmka_buf_end, "%16" PRIx64 ":",
  91                         curthread->t_did);
  92                 rsmka_buf_end += 17;
  93                 (void) vsprintf_len(255, rsmka_buf_end, fmt, ap);
  94                 rsmka_buf_end += strlen(rsmka_buf_end);
  95                 if (rsmka_buf_end > rsmka_buf_top) {
  96                         rsmka_buf_end = rsmka_buf;
  97                 }
  98                 mutex_exit(&rsmka_buf_lock);
  99                 va_end(ap);
 100         }
 101 }