libcfs/libcfs/winnt/winnt-tracefile.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_LNET
  38 #define LUSTRE_TRACEFILE_PRIVATE
  39
  40 #include <libcfs/libcfs.h>
  41 #include "tracefile.h"
  42
  43 /* percents to share the total debug memory for each type */
  44 static unsigned int pages_factor[CFS_TCD_TYPE_MAX] = {
  45         90,  /* 90% pages for CFS_TCD_TYPE_PASSIVE */
  46         10   /* 10% pages for CFS_TCD_TYPE_DISPATCH */
  47 };
  48
  49 char *cfs_trace_console_buffers[CFS_NR_CPUS][CFS_TCD_TYPE_MAX];
  50
  51 cfs_rw_semaphore_t cfs_tracefile_sem;
  52
  53 int cfs_tracefile_init_arch()
  54 {
  55         int    i;
  56         int    j;
  57         struct cfs_trace_cpu_data *tcd;
  58
  59         cfs_init_rwsem(&cfs_tracefile_sem);
  60
  61         /* initialize trace_data */
  62         memset(cfs_trace_data, 0, sizeof(cfs_trace_data));
  63         for (i = 0; i < CFS_TCD_TYPE_MAX; i++) {
  64                 cfs_trace_data[i] =
  65                         cfs_alloc(sizeof(union cfs_trace_data_union) * \
  66                                   CFS_NR_CPUS, GFP_KERNEL);
  67                 if (cfs_trace_data[i] == NULL)
  68                         goto out;
  69         }
  70
  71         /* arch related info initialized */
  72         cfs_tcd_for_each(tcd, i, j) {
  73                 tcd->tcd_pages_factor = (USHORT) pages_factor[i];
  74                 tcd->tcd_type = (USHORT) i;
  75                 tcd->tcd_cpu = (USHORT)j;
  76         }
  77
  78         for (i = 0; i < cfs_num_possible_cpus(); i++)
  79                 for (j = 0; j < CFS_TCD_TYPE_MAX; j++) {
  80                         cfs_trace_console_buffers[i][j] =
  81                                 cfs_alloc(CFS_TRACE_CONSOLE_BUFFER_SIZE,
  82                                           GFP_KERNEL);
  83
  84                         if (cfs_trace_console_buffers[i][j] == NULL)
  85                                 goto out;
  86                 }
  87
  88         return 0;
  89
  90 out:
  91         cfs_tracefile_fini_arch();
  92         printk(CFS_KERN_ERR "lnet: Not enough memory\n");
  93         return -ENOMEM;
  94
  95 }
  96
  97 void cfs_tracefile_fini_arch()
  98 {
  99         int    i;
 100         int    j;
 101
 102         for (i = 0; i < cfs_num_possible_cpus(); i++) {
 103                 for (j = 0; j < CFS_TCD_TYPE_MAX; j++) {
 104                         if (cfs_trace_console_buffers[i][j] != NULL) {
 105                                 cfs_free(cfs_trace_console_buffers[i][j]);
 106                                 cfs_trace_console_buffers[i][j] = NULL;
 107                         }
 108                 }
 109         }
 110
 111         for (i = 0; cfs_trace_data[i] != NULL; i++) {
 112                 cfs_free(cfs_trace_data[i]);
 113                 cfs_trace_data[i] = NULL;
 114         }
 115
 116         cfs_fini_rwsem(&cfs_tracefile_sem);
 117 }
 118
 119 void cfs_tracefile_read_lock()
 120 {
 121         cfs_down_read(&cfs_tracefile_sem);
 122 }
 123
 124 void cfs_tracefile_read_unlock()
 125 {
 126         cfs_up_read(&cfs_tracefile_sem);
 127 }
 128
 129 void cfs_tracefile_write_lock()
 130 {
 131         cfs_down_write(&cfs_tracefile_sem);
 132 }
 133
 134 void cfs_tracefile_write_unlock()
 135 {
 136         cfs_up_write(&cfs_tracefile_sem);
 137 }
 138
 139 cfs_trace_buf_type_t cfs_trace_buf_idx_get()
 140 {
 141         if (KeGetCurrentIrql() >= DISPATCH_LEVEL)
 142                 return CFS_TCD_TYPE_DISPATCH;
 143         else
 144                 return CFS_TCD_TYPE_PASSIVE;
 145 }
 146
 147 int cfs_trace_lock_tcd(struct cfs_trace_cpu_data *tcd)
 148 {
 149         __LASSERT(tcd->tcd_type < CFS_TCD_TYPE_MAX);
 150         return 1;
 151 }
 152
 153 void cfs_trace_unlock_tcd(struct cfs_trace_cpu_data *tcd)
 154 {
 155         __LASSERT(tcd->tcd_type < CFS_TCD_TYPE_MAX);
 156 }
 157
 158 int cfs_tcd_owns_tage(struct cfs_trace_cpu_data *tcd,
 159                       struct cfs_trace_page *tage)
 160 {
 161         /*
 162          * XXX nikita: do NOT call portals_debug_msg() (CDEBUG/ENTRY/EXIT)
 163          * from here: this will lead to infinite recursion.
 164          */
 165         return tcd->tcd_cpu == tage->cpu;
 166 }
 167
 168 void
 169 cfs_set_ptldebug_header(struct ptldebug_header *header, int subsys, int mask,
 170                         const int line, unsigned long stack)
 171 {
 172         struct timeval tv;
 173
 174         cfs_gettimeofday(&tv);
 175
 176         header->ph_subsys = subsys;
 177         header->ph_mask = mask;
 178         header->ph_cpu_id = cfs_smp_processor_id();
 179         header->ph_type = cfs_trace_buf_idx_get();
 180         header->ph_sec = (__u32)tv.tv_sec;
 181         header->ph_usec = tv.tv_usec;
 182         header->ph_stack = stack;
 183         header->ph_pid = (__u32)(ULONG_PTR)current->pid;
 184         header->ph_line_num = line;
 185         header->ph_extern_pid = 0;
 186         return;
 187 }
 188
 189 void cfs_print_to_console(struct ptldebug_header *hdr, int mask,
 190                           const char *buf, int len, const char *file,
 191                           const char *fn)
 192 {
 193         char *prefix = "Lustre", *ptype = NULL;
 194
 195         if ((mask & D_EMERG) != 0) {
 196                 prefix = "LustreError";
 197                 ptype = CFS_KERN_EMERG;
 198         } else if ((mask & D_ERROR) != 0) {
 199                 prefix = "LustreError";
 200                 ptype = CFS_KERN_ERR;
 201         } else if ((mask & D_WARNING) != 0) {
 202                 prefix = "Lustre";
 203                 ptype = CFS_KERN_WARNING;
 204         } else if ((mask & (D_CONSOLE | libcfs_printk)) != 0) {
 205                 prefix = "Lustre";
 206                 ptype = CFS_KERN_INFO;
 207         }
 208
 209         if ((mask & D_CONSOLE) != 0) {
 210                 printk("%s%s: %.*s", ptype, prefix, len, buf);
 211         } else {
 212                 printk("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix, hdr->ph_pid,
 213                        hdr->ph_extern_pid, file, hdr->ph_line_num, fn, len, buf);
 214         }
 215         return;
 216 }
 217
 218 int cfs_trace_max_debug_mb(void)
 219 {
 220         int  total_mb = (cfs_num_physpages >> (20 - CFS_PAGE_SHIFT));
 221
 222         return MAX(512, (total_mb * 80)/100);
 223 }