libcfs/libcfs/winnt/winnt-tracefile.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  */
  30 /*
  31  * This file is part of Lustre, http://www.lustre.org/
  32  * Lustre is a trademark of Sun Microsystems, Inc.
  33  */
  34
  35 #define DEBUG_SUBSYSTEM S_LNET
  36 #define LUSTRE_TRACEFILE_PRIVATE
  37
  38 #include <libcfs/libcfs.h>
  39 #include "tracefile.h"
  40
  41 /* percents to share the total debug memory for each type */
  42 static unsigned int pages_factor[CFS_TCD_TYPE_MAX] = {
  43         90,  /* 90% pages for CFS_TCD_TYPE_PASSIVE */
  44         10   /* 10% pages for CFS_TCD_TYPE_DISPATCH */
  45 };
  46
  47 char *cfs_trace_console_buffers[CFS_NR_CPUS][CFS_TCD_TYPE_MAX];
  48
  49 cfs_rw_semaphore_t cfs_tracefile_sem;
  50
  51 int cfs_tracefile_init_arch()
  52 {
  53         int    i;
  54         int    j;
  55         struct cfs_trace_cpu_data *tcd;
  56
  57         cfs_init_rwsem(&cfs_tracefile_sem);
  58
  59         /* initialize trace_data */
  60         memset(cfs_trace_data, 0, sizeof(cfs_trace_data));
  61         for (i = 0; i < CFS_TCD_TYPE_MAX; i++) {
  62                 cfs_trace_data[i] =
  63                         cfs_alloc(sizeof(union cfs_trace_data_union) * \
  64                                   CFS_NR_CPUS, GFP_KERNEL);
  65                 if (cfs_trace_data[i] == NULL)
  66                         goto out;
  67         }
  68
  69         /* arch related info initialized */
  70         cfs_tcd_for_each(tcd, i, j) {
  71                 tcd->tcd_pages_factor = (USHORT) pages_factor[i];
  72                 tcd->tcd_type = (USHORT) i;
  73                 tcd->tcd_cpu = (USHORT)j;
  74         }
  75
  76         for (i = 0; i < cfs_num_possible_cpus(); i++)
  77                 for (j = 0; j < CFS_TCD_TYPE_MAX; j++) {
  78                         cfs_trace_console_buffers[i][j] =
  79                                 cfs_alloc(CFS_TRACE_CONSOLE_BUFFER_SIZE,
  80                                           GFP_KERNEL);
  81
  82                         if (cfs_trace_console_buffers[i][j] == NULL)
  83                                 goto out;
  84                 }
  85
  86         return 0;
  87
  88 out:
  89         cfs_tracefile_fini_arch();
  90         printk(CFS_KERN_ERR "lnet: Not enough memory\n");
  91         return -ENOMEM;
  92
  93 }
  94
  95 void cfs_tracefile_fini_arch()
  96 {
  97         int    i;
  98         int    j;
  99
 100         for (i = 0; i < cfs_num_possible_cpus(); i++) {
 101                 for (j = 0; j < CFS_TCD_TYPE_MAX; j++) {
 102                         if (cfs_trace_console_buffers[i][j] != NULL) {
 103                                 cfs_free(cfs_trace_console_buffers[i][j]);
 104                                 cfs_trace_console_buffers[i][j] = NULL;
 105                         }
 106                 }
 107         }
 108
 109         for (i = 0; cfs_trace_data[i] != NULL; i++) {
 110                 cfs_free(cfs_trace_data[i]);
 111                 cfs_trace_data[i] = NULL;
 112         }
 113
 114         cfs_fini_rwsem(&cfs_tracefile_sem);
 115 }
 116
 117 void cfs_tracefile_read_lock()
 118 {
 119         cfs_down_read(&cfs_tracefile_sem);
 120 }
 121
 122 void cfs_tracefile_read_unlock()
 123 {
 124         cfs_up_read(&cfs_tracefile_sem);
 125 }
 126
 127 void cfs_tracefile_write_lock()
 128 {
 129         cfs_down_write(&cfs_tracefile_sem);
 130 }
 131
 132 void cfs_tracefile_write_unlock()
 133 {
 134         cfs_up_write(&cfs_tracefile_sem);
 135 }
 136
 137 cfs_trace_buf_type_t cfs_trace_buf_idx_get()
 138 {
 139         if (KeGetCurrentIrql() >= DISPATCH_LEVEL)
 140                 return CFS_TCD_TYPE_DISPATCH;
 141         else
 142                 return CFS_TCD_TYPE_PASSIVE;
 143 }
 144
 145 int cfs_trace_lock_tcd(struct cfs_trace_cpu_data *tcd, int walking)
 146 {
 147         __LASSERT(tcd->tcd_type < CFS_TCD_TYPE_MAX);
 148         return 1;
 149 }
 150
 151 void cfs_trace_unlock_tcd(struct cfs_trace_cpu_data *tcd, int walking)
 152 {
 153         __LASSERT(tcd->tcd_type < CFS_TCD_TYPE_MAX);
 154 }
 155
 156 int cfs_tcd_owns_tage(struct cfs_trace_cpu_data *tcd,
 157                       struct cfs_trace_page *tage)
 158 {
 159         /*
 160          * XXX nikita: do NOT call portals_debug_msg() (CDEBUG/ENTRY/EXIT)
 161          * from here: this will lead to infinite recursion.
 162          */
 163         return tcd->tcd_cpu == tage->cpu;
 164 }
 165
 166 void
 167 cfs_set_ptldebug_header(struct ptldebug_header *header, int subsys, int mask,
 168                         const int line, unsigned long stack)
 169 {
 170         struct timeval tv;
 171
 172         cfs_gettimeofday(&tv);
 173
 174         header->ph_subsys = subsys;
 175         header->ph_mask = mask;
 176         header->ph_cpu_id = cfs_smp_processor_id();
 177         header->ph_type = cfs_trace_buf_idx_get();
 178         header->ph_sec = (__u32)tv.tv_sec;
 179         header->ph_usec = tv.tv_usec;
 180         header->ph_stack = stack;
 181         header->ph_pid = (__u32)(ULONG_PTR)current->pid;
 182         header->ph_line_num = line;
 183         header->ph_extern_pid = 0;
 184         return;
 185 }
 186
 187 void cfs_print_to_console(struct ptldebug_header *hdr, int mask,
 188                           const char *buf, int len, const char *file,
 189                           const char *fn)
 190 {
 191         char *prefix = "Lustre", *ptype = NULL;
 192
 193         if ((mask & D_EMERG) != 0) {
 194                 prefix = "LustreError";
 195                 ptype = CFS_KERN_EMERG;
 196         } else if ((mask & D_ERROR) != 0) {
 197                 prefix = "LustreError";
 198                 ptype = CFS_KERN_ERR;
 199         } else if ((mask & D_WARNING) != 0) {
 200                 prefix = "Lustre";
 201                 ptype = CFS_KERN_WARNING;
 202         } else if ((mask & (D_CONSOLE | libcfs_printk)) != 0) {
 203                 prefix = "Lustre";
 204                 ptype = CFS_KERN_INFO;
 205         }
 206
 207         if ((mask & D_CONSOLE) != 0) {
 208                 printk("%s%s: %.*s", ptype, prefix, len, buf);
 209         } else {
 210                 printk("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix, hdr->ph_pid,
 211                        hdr->ph_extern_pid, file, hdr->ph_line_num, fn, len, buf);
 212         }
 213         return;
 214 }
 215
 216 int cfs_trace_max_debug_mb(void)
 217 {
 218         int  total_mb = (cfs_num_physpages >> (20 - CFS_PAGE_SHIFT));
 219
 220         return MAX(512, (total_mb * 80)/100);
 221 }