lnet/libcfs/debug.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Copyright (C) 2002 Cluster File Systems, Inc.
   5  *   Author: Phil Schwan <phil@clusterfs.com>
   6  *
   7  *   This file is part of Lustre, http://www.lustre.org.
   8  *
   9  *   Lustre is free software; you can redistribute it and/or
  10  *   modify it under the terms of version 2 of the GNU General Public
  11  *   License as published by the Free Software Foundation.
  12  *
  13  *   Lustre is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with Lustre; if not, write to the Free Software
  20  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  */
  22
  23 #ifndef EXPORT_SYMTAB
  24 # define EXPORT_SYMTAB
  25 #endif
  26
  27 # define DEBUG_SUBSYSTEM S_PORTALS
  28
  29 #include <libcfs/kp30.h>
  30 #include <libcfs/libcfs.h>
  31
  32 #include "tracefile.h"
  33
  34 unsigned int portal_subsystem_debug = ~0 - (S_PORTALS | S_NAL);
  35 EXPORT_SYMBOL(portal_subsystem_debug);
  36
  37 unsigned int portal_debug = (D_WARNING | D_DLMTRACE | D_ERROR | D_EMERG | D_HA |
  38                              D_RPCTRACE | D_VFSTRACE);
  39 EXPORT_SYMBOL(portal_debug);
  40
  41 unsigned int portal_printk;
  42 EXPORT_SYMBOL(portal_printk);
  43
  44 unsigned int portal_stack;
  45 EXPORT_SYMBOL(portal_stack);
  46
  47 #ifdef __KERNEL__
  48 atomic_t portal_kmemory = ATOMIC_INIT(0);
  49 EXPORT_SYMBOL(portal_kmemory);
  50 #endif
  51
  52 static cfs_waitq_t debug_ctlwq;
  53
  54 char debug_file_path[1024] = "/tmp/lustre-log";
  55 static char debug_file_name[1024];
  56
  57 void portals_debug_dumplog_internal(void *arg)
  58 {
  59         CFS_DECL_JOURNAL_DATA;
  60
  61         CFS_PUSH_JOURNAL;
  62
  63         snprintf(debug_file_name, sizeof(debug_file_path) - 1,
  64                  "%s.%ld.%ld", debug_file_path, cfs_time_current_sec(), (long)arg);
  65         printk(KERN_ALERT "LustreError: dumping log to %s\n", debug_file_name);
  66         tracefile_dump_all_pages(debug_file_name);
  67
  68         CFS_POP_JOURNAL;
  69 }
  70
  71 int portals_debug_dumplog_thread(void *arg)
  72 {
  73         kportal_daemonize("");
  74         reparent_to_init();
  75         portals_debug_dumplog_internal(arg);
  76         cfs_waitq_signal(&debug_ctlwq);
  77         return 0;
  78 }
  79
  80 void portals_debug_dumplog(void)
  81 {
  82         int            rc;
  83         cfs_waitlink_t wait;
  84         ENTRY;
  85
  86         /* we're being careful to ensure that the kernel thread is
  87          * able to set our state to running as it exits before we
  88          * get to schedule() */
  89         cfs_waitlink_init(&wait);
  90         set_current_state(TASK_INTERRUPTIBLE);
  91         cfs_waitq_add(&debug_ctlwq, &wait);
  92
  93         rc = cfs_kernel_thread(portals_debug_dumplog_thread,
  94                                (void *)(long)cfs_curproc_pid(),
  95                                CLONE_VM | CLONE_FS | CLONE_FILES);
  96         if (rc < 0)
  97                 printk(KERN_ERR "LustreError: cannot start log dump thread: "
  98                        "%d\n", rc);
  99         else
 100                 schedule();
 101
 102         /* be sure to teardown if kernel_thread() failed */
 103         cfs_waitq_del(&debug_ctlwq, &wait);
 104         set_current_state(TASK_RUNNING);
 105 }
 106
 107 #ifdef PORTALS_DUMP_ON_PANIC
 108 static int panic_dumplog(struct notifier_block *self, unsigned long unused1,
 109                          void *unused2)
 110 {
 111         static int handled_panic; /* to avoid recursive calls to notifiers */
 112
 113         if (handled_panic)
 114                 return 0;
 115         else
 116                 handled_panic = 1;
 117
 118         if (in_interrupt()) {
 119                 trace_debug_print();
 120                 return 0;
 121         }
 122
 123         while (current->lock_depth >= 0)
 124                 unlock_kernel();
 125         portals_debug_dumplog();
 126         return 0;
 127 }
 128
 129 static struct notifier_block lustre_panic_notifier = {
 130         notifier_call :     panic_dumplog,
 131         next :              NULL,
 132         priority :          10000
 133 };
 134 #endif
 135
 136 #ifdef CRAY_PORTALS
 137 extern void *lus_portals_debug;
 138 #endif
 139
 140 int portals_debug_init(unsigned long bufsize)
 141 {
 142         cfs_waitq_init(&debug_ctlwq);
 143 #ifdef CRAY_PORTALS
 144         lus_portals_debug = &portals_debug_msg;
 145 #endif
 146 #ifdef PORTALS_DUMP_ON_PANIC
 147         /* This is currently disabled because it spews far too much to the
 148          * console on the rare cases it is ever triggered. */
 149         notifier_chain_register(&panic_notifier_list, &lustre_panic_notifier);
 150 #endif
 151         return tracefile_init();
 152 }
 153
 154 int portals_debug_cleanup(void)
 155 {
 156         tracefile_exit();
 157 #ifdef PORTALS_DUMP_ON_PANIC
 158         notifier_chain_unregister(&panic_notifier_list, &lustre_panic_notifier);
 159 #endif
 160 #ifdef CRAY_PORTALS
 161         lus_portals_debug = NULL;
 162 #endif
 163         return 0;
 164 }
 165
 166 int portals_debug_clear_buffer(void)
 167 {
 168         trace_flush_pages();
 169         return 0;
 170 }
 171
 172 /* Debug markers, although printed by S_PORTALS
 173  * should not be be marked as such. */
 174 #undef DEBUG_SUBSYSTEM
 175 #define DEBUG_SUBSYSTEM S_UNDEFINED
 176 int portals_debug_mark_buffer(char *text)
 177 {
 178         CDEBUG(D_TRACE,"***************************************************\n");
 179         CDEBUG(D_WARNING, "DEBUG MARKER: %s\n", text);
 180         CDEBUG(D_TRACE,"***************************************************\n");
 181
 182         return 0;
 183 }
 184 #undef DEBUG_SUBSYSTEM
 185 #define DEBUG_SUBSYSTEM S_PORTALS
 186
 187 void portals_debug_set_level(unsigned int debug_level)
 188 {
 189         printk(KERN_WARNING "Lustre: Setting portals debug level to %08x\n",
 190                debug_level);
 191         portal_debug = debug_level;
 192 }
 193
 194 char *portals_nid2str(int nal, ptl_nid_t nid, char *str)
 195 {
 196         if (nid == PTL_NID_ANY) {
 197                 snprintf(str, PTL_NALFMT_SIZE, "%s", "PTL_NID_ANY");
 198                 return str;
 199         }
 200
 201         switch(nal){
 202 /* XXX this could be a nal method of some sort, 'cept it's config
 203  * dependent whether (say) socknal NIDs are actually IP addresses... */
 204 #if !CRAY_PORTALS
 205         case TCPNAL:
 206                 /* userspace NAL */
 207         case IIBNAL:
 208         case VIBNAL:
 209         case OPENIBNAL:
 210         case RANAL:
 211         case SOCKNAL:
 212                 snprintf(str, PTL_NALFMT_SIZE, "%u:%u.%u.%u.%u",
 213                          (__u32)(nid >> 32), HIPQUAD(nid));
 214                 break;
 215         case QSWNAL:
 216         case GMNAL:
 217         case LONAL:
 218                 snprintf(str, PTL_NALFMT_SIZE, "%u:%u",
 219                          (__u32)(nid >> 32), (__u32)nid);
 220                 break;
 221 #endif
 222         default:
 223                 snprintf(str, PTL_NALFMT_SIZE, "?%x? %llx",
 224                          nal, (long long)nid);
 225                 break;
 226         }
 227         return str;
 228 }
 229
 230 char *portals_id2str(int nal, ptl_process_id_t id, char *str)
 231 {
 232         int   len;
 233
 234         portals_nid2str(nal, id.nid, str);
 235         len = strlen(str);
 236         snprintf(str + len, PTL_NALFMT_SIZE - len, "-%u", id.pid);
 237         return str;
 238 }
 239
 240 EXPORT_SYMBOL(portals_debug_dumplog);
 241 EXPORT_SYMBOL(portals_debug_set_level);
 242 EXPORT_SYMBOL(portals_nid2str);
 243 EXPORT_SYMBOL(portals_id2str);