source3/profile/profile.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    store smbd profiling information in shared memory
   4    Copyright (C) Andrew Tridgell 1999
   5    Copyright (C) James Peach 2006
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 */
  21
  22 #include "includes.h"
  23 #include "system/shmem.h"
  24 #include "system/filesys.h"
  25 #include "system/time.h"
  26 #include "messages.h"
  27 #include "smbprofile.h"
  28 #include "lib/tdb_wrap/tdb_wrap.h"
  29 #include <tevent.h>
  30 #include "../lib/crypto/crypto.h"
  31
  32 #ifdef HAVE_SYS_RESOURCE_H
  33 #include <sys/resource.h>
  34 #endif
  35
  36 struct profile_stats *profile_p;
  37 struct smbprofile_global_state smbprofile_state;
  38
  39 /****************************************************************************
  40 Set a profiling level.
  41 ****************************************************************************/
  42 void set_profile_level(int level, const struct server_id *src)
  43 {
  44         SMB_ASSERT(smbprofile_state.internal.db != NULL);
  45
  46         switch (level) {
  47         case 0:         /* turn off profiling */
  48                 smbprofile_state.config.do_count = false;
  49                 smbprofile_state.config.do_times = false;
  50                 DEBUG(1,("INFO: Profiling turned OFF from pid %d\n",
  51                          (int)procid_to_pid(src)));
  52                 break;
  53         case 1:         /* turn on counter profiling only */
  54                 smbprofile_state.config.do_count = true;
  55                 smbprofile_state.config.do_times = false;
  56                 DEBUG(1,("INFO: Profiling counts turned ON from pid %d\n",
  57                          (int)procid_to_pid(src)));
  58                 break;
  59         case 2:         /* turn on complete profiling */
  60                 smbprofile_state.config.do_count = true;
  61                 smbprofile_state.config.do_times = true;
  62                 DEBUG(1,("INFO: Full profiling turned ON from pid %d\n",
  63                          (int)procid_to_pid(src)));
  64                 break;
  65         case 3:         /* reset profile values */
  66                 ZERO_STRUCT(profile_p->values);
  67                 tdb_wipe_all(smbprofile_state.internal.db->tdb);
  68                 DEBUG(1,("INFO: Profiling values cleared from pid %d\n",
  69                          (int)procid_to_pid(src)));
  70                 break;
  71         }
  72 }
  73
  74 /****************************************************************************
  75 receive a set profile level message
  76 ****************************************************************************/
  77 static void profile_message(struct messaging_context *msg_ctx,
  78                             void *private_data,
  79                             uint32_t msg_type,
  80                             struct server_id src,
  81                             DATA_BLOB *data)
  82 {
  83         int level;
  84
  85         if (data->length != sizeof(level)) {
  86                 DEBUG(0, ("got invalid profile message\n"));
  87                 return;
  88         }
  89
  90         memcpy(&level, data->data, sizeof(level));
  91         set_profile_level(level, &src);
  92 }
  93
  94 /****************************************************************************
  95 receive a request profile level message
  96 ****************************************************************************/
  97 static void reqprofile_message(struct messaging_context *msg_ctx,
  98                                void *private_data,
  99                                uint32_t msg_type,
 100                                struct server_id src,
 101                                DATA_BLOB *data)
 102 {
 103         int level;
 104
 105         level = 1;
 106         if (smbprofile_state.config.do_count) {
 107                 level += 2;
 108         }
 109         if (smbprofile_state.config.do_times) {
 110                 level += 4;
 111         }
 112
 113         DEBUG(1,("INFO: Received REQ_PROFILELEVEL message from PID %u\n",
 114                  (unsigned int)procid_to_pid(&src)));
 115         messaging_send_buf(msg_ctx, src, MSG_PROFILELEVEL,
 116                            (uint8_t *)&level, sizeof(level));
 117 }
 118
 119 /*******************************************************************
 120   open the profiling shared memory area
 121   ******************************************************************/
 122 bool profile_setup(struct messaging_context *msg_ctx, bool rdonly)
 123 {
 124         unsigned char tmp[16] = {};
 125         MD5_CTX md5;
 126         char *db_name;
 127
 128         if (smbprofile_state.internal.db != NULL) {
 129                 return true;
 130         }
 131
 132         db_name = cache_path("smbprofile.tdb");
 133         if (db_name == NULL) {
 134                 return false;
 135         }
 136
 137         smbprofile_state.internal.db = tdb_wrap_open(
 138                 NULL, db_name, 0,
 139                 rdonly ? 0 : TDB_CLEAR_IF_FIRST|TDB_MUTEX_LOCKING,
 140                 O_CREAT | (rdonly ? O_RDONLY : O_RDWR), 0644);
 141         if (smbprofile_state.internal.db == NULL) {
 142                 return false;
 143         }
 144
 145         if (msg_ctx != NULL) {
 146                 messaging_register(msg_ctx, NULL, MSG_PROFILE,
 147                                    profile_message);
 148                 messaging_register(msg_ctx, NULL, MSG_REQ_PROFILELEVEL,
 149                                    reqprofile_message);
 150         }
 151
 152         MD5Init(&md5);
 153
 154         MD5Update(&md5,
 155                   (const uint8_t *)&smbprofile_state.stats.global,
 156                   sizeof(smbprofile_state.stats.global));
 157
 158 #define __UPDATE(str) do { \
 159         MD5Update(&md5, (const uint8_t *)str, strlen(str)); \
 160 } while(0)
 161 #define SMBPROFILE_STATS_START
 162 #define SMBPROFILE_STATS_SECTION_START(name, display) do { \
 163         __UPDATE(#name "+" #display); \
 164 } while(0);
 165 #define SMBPROFILE_STATS_COUNT(name) do { \
 166         __UPDATE(#name "+count"); \
 167 } while(0);
 168 #define SMBPROFILE_STATS_TIME(name) do { \
 169         __UPDATE(#name "+time"); \
 170 } while(0);
 171 #define SMBPROFILE_STATS_BASIC(name) do { \
 172         __UPDATE(#name "+count"); \
 173         __UPDATE(#name "+time"); \
 174 } while(0);
 175 #define SMBPROFILE_STATS_BYTES(name) do { \
 176         __UPDATE(#name "+count"); \
 177         __UPDATE(#name "+time"); \
 178         __UPDATE(#name "+idle"); \
 179         __UPDATE(#name "+bytes"); \
 180 } while(0);
 181 #define SMBPROFILE_STATS_IOBYTES(name) do { \
 182         __UPDATE(#name "+count"); \
 183         __UPDATE(#name "+time"); \
 184         __UPDATE(#name "+idle"); \
 185         __UPDATE(#name "+inbytes"); \
 186         __UPDATE(#name "+outbytes"); \
 187 } while(0);
 188 #define SMBPROFILE_STATS_SECTION_END
 189 #define SMBPROFILE_STATS_END
 190         SMBPROFILE_STATS_ALL_SECTIONS
 191 #undef __UPDATE
 192 #undef SMBPROFILE_STATS_START
 193 #undef SMBPROFILE_STATS_SECTION_START
 194 #undef SMBPROFILE_STATS_COUNT
 195 #undef SMBPROFILE_STATS_TIME
 196 #undef SMBPROFILE_STATS_BASIC
 197 #undef SMBPROFILE_STATS_BYTES
 198 #undef SMBPROFILE_STATS_IOBYTES
 199 #undef SMBPROFILE_STATS_SECTION_END
 200 #undef SMBPROFILE_STATS_END
 201
 202         MD5Final(tmp, &md5);
 203
 204         profile_p = &smbprofile_state.stats.global;
 205
 206         profile_p->magic = BVAL(tmp, 0);
 207         if (profile_p->magic == 0) {
 208                 profile_p->magic = BVAL(tmp, 8);
 209         }
 210
 211         return True;
 212 }
 213
 214 void smbprofile_dump_setup(struct tevent_context *ev)
 215 {
 216         TALLOC_FREE(smbprofile_state.internal.te);
 217         smbprofile_state.internal.ev = ev;
 218 }
 219
 220 static void smbprofile_dump_timer(struct tevent_context *ev,
 221                                   struct tevent_timer *te,
 222                                   struct timeval current_time,
 223                                   void *private_data)
 224 {
 225         smbprofile_dump();
 226 }
 227
 228 void smbprofile_dump_schedule_timer(void)
 229 {
 230         struct timeval tv;
 231
 232         GetTimeOfDay(&tv);
 233         tv.tv_sec += 1;
 234
 235         smbprofile_state.internal.te = tevent_add_timer(
 236                                 smbprofile_state.internal.ev,
 237                                 smbprofile_state.internal.ev,
 238                                 tv,
 239                                 smbprofile_dump_timer,
 240                                 NULL);
 241 }
 242
 243 static int profile_stats_parser(TDB_DATA key, TDB_DATA value,
 244                                 void *private_data)
 245 {
 246         struct profile_stats *s = private_data;
 247
 248         if (value.dsize != sizeof(struct profile_stats)) {
 249                 *s = (struct profile_stats) {};
 250                 return 0;
 251         }
 252
 253         memcpy(s, value.dptr, value.dsize);
 254         if (s->magic != profile_p->magic) {
 255                 *s = (struct profile_stats) {};
 256                 return 0;
 257         }
 258
 259         return 0;
 260 }
 261
 262 void smbprofile_dump(void)
 263 {
 264         pid_t pid = getpid();
 265         TDB_DATA key = { .dptr = (uint8_t *)&pid, .dsize = sizeof(pid) };
 266         struct profile_stats s = {};
 267         int ret;
 268 #ifdef HAVE_GETRUSAGE
 269         struct rusage rself;
 270 #endif /* HAVE_GETRUSAGE */
 271
 272         TALLOC_FREE(smbprofile_state.internal.te);
 273
 274         if (smbprofile_state.internal.db == NULL) {
 275                 return;
 276         }
 277
 278 #ifdef HAVE_GETRUSAGE
 279         ret = getrusage(RUSAGE_SELF, &rself);
 280         if (ret != 0) {
 281                 ZERO_STRUCT(rself);
 282         }
 283
 284         profile_p->values.cpu_user_stats.time =
 285                 (rself.ru_utime.tv_sec * 1000000) +
 286                 rself.ru_utime.tv_usec;
 287         profile_p->values.cpu_system_stats.time =
 288                 (rself.ru_stime.tv_sec * 1000000) +
 289                 rself.ru_stime.tv_usec;
 290 #endif /* HAVE_GETRUSAGE */
 291
 292         ret = tdb_chainlock(smbprofile_state.internal.db->tdb, key);
 293         if (ret != 0) {
 294                 return;
 295         }
 296
 297         tdb_parse_record(smbprofile_state.internal.db->tdb,
 298                          key, profile_stats_parser, &s);
 299
 300         smbprofile_stats_accumulate(profile_p, &s);
 301
 302         tdb_store(smbprofile_state.internal.db->tdb, key,
 303                   (TDB_DATA) {
 304                         .dptr = (uint8_t *)profile_p,
 305                         .dsize = sizeof(*profile_p)
 306                   },
 307                   0);
 308
 309         tdb_chainunlock(smbprofile_state.internal.db->tdb, key);
 310         ZERO_STRUCT(profile_p->values);
 311
 312         return;
 313 }
 314
 315 void smbprofile_cleanup(pid_t pid, pid_t dst)
 316 {
 317         TDB_DATA key = { .dptr = (uint8_t *)&pid, .dsize = sizeof(pid) };
 318         struct profile_stats s = {};
 319         struct profile_stats acc = {};
 320         int ret;
 321
 322         if (smbprofile_state.internal.db == NULL) {
 323                 return;
 324         }
 325
 326         ret = tdb_chainlock(smbprofile_state.internal.db->tdb, key);
 327         if (ret != 0) {
 328                 return;
 329         }
 330         ret = tdb_parse_record(smbprofile_state.internal.db->tdb,
 331                                key, profile_stats_parser, &s);
 332         if (ret == -1) {
 333                 tdb_chainunlock(smbprofile_state.internal.db->tdb, key);
 334                 return;
 335         }
 336         tdb_delete(smbprofile_state.internal.db->tdb, key);
 337         tdb_chainunlock(smbprofile_state.internal.db->tdb, key);
 338
 339         pid = dst;
 340         ret = tdb_chainlock(smbprofile_state.internal.db->tdb, key);
 341         if (ret != 0) {
 342                 return;
 343         }
 344         tdb_parse_record(smbprofile_state.internal.db->tdb,
 345                          key, profile_stats_parser, &acc);
 346
 347         /*
 348          * We may have to fix the disconnect count
 349          * in case the process died
 350          */
 351         s.values.disconnect_stats.count = s.values.connect_stats.count;
 352
 353         smbprofile_stats_accumulate(&acc, &s);
 354
 355         acc.magic = profile_p->magic;
 356         tdb_store(smbprofile_state.internal.db->tdb, key,
 357                   (TDB_DATA) {
 358                         .dptr = (uint8_t *)&acc,
 359                         .dsize = sizeof(acc)
 360                   },
 361                   0);
 362
 363         tdb_chainunlock(smbprofile_state.internal.db->tdb, key);
 364 }
 365
 366 void smbprofile_stats_accumulate(struct profile_stats *acc,
 367                                  const struct profile_stats *add)
 368 {
 369 #define SMBPROFILE_STATS_START
 370 #define SMBPROFILE_STATS_SECTION_START(name, display)
 371 #define SMBPROFILE_STATS_COUNT(name) do { \
 372         acc->values.name##_stats.count += add->values.name##_stats.count; \
 373 } while(0);
 374 #define SMBPROFILE_STATS_TIME(name) do { \
 375         acc->values.name##_stats.time += add->values.name##_stats.time; \
 376 } while(0);
 377 #define SMBPROFILE_STATS_BASIC(name) do { \
 378         acc->values.name##_stats.count += add->values.name##_stats.count; \
 379         acc->values.name##_stats.time += add->values.name##_stats.time; \
 380 } while(0);
 381 #define SMBPROFILE_STATS_BYTES(name) do { \
 382         acc->values.name##_stats.count += add->values.name##_stats.count; \
 383         acc->values.name##_stats.time += add->values.name##_stats.time; \
 384         acc->values.name##_stats.idle += add->values.name##_stats.idle; \
 385         acc->values.name##_stats.bytes += add->values.name##_stats.bytes; \
 386 } while(0);
 387 #define SMBPROFILE_STATS_IOBYTES(name) do { \
 388         acc->values.name##_stats.count += add->values.name##_stats.count; \
 389         acc->values.name##_stats.time += add->values.name##_stats.time; \
 390         acc->values.name##_stats.idle += add->values.name##_stats.idle; \
 391         acc->values.name##_stats.inbytes += add->values.name##_stats.inbytes; \
 392         acc->values.name##_stats.outbytes += add->values.name##_stats.outbytes; \
 393 } while(0);
 394 #define SMBPROFILE_STATS_SECTION_END
 395 #define SMBPROFILE_STATS_END
 396         SMBPROFILE_STATS_ALL_SECTIONS
 397 #undef SMBPROFILE_STATS_START
 398 #undef SMBPROFILE_STATS_SECTION_START
 399 #undef SMBPROFILE_STATS_COUNT
 400 #undef SMBPROFILE_STATS_TIME
 401 #undef SMBPROFILE_STATS_BASIC
 402 #undef SMBPROFILE_STATS_BYTES
 403 #undef SMBPROFILE_STATS_IOBYTES
 404 #undef SMBPROFILE_STATS_SECTION_END
 405 #undef SMBPROFILE_STATS_END
 406 }
 407
 408 static int smbprofile_collect_fn(struct tdb_context *tdb,
 409                                  TDB_DATA key, TDB_DATA value,
 410                                  void *private_data)
 411 {
 412         struct profile_stats *acc = (struct profile_stats *)private_data;
 413         const struct profile_stats *v;
 414
 415         if (value.dsize != sizeof(struct profile_stats)) {
 416                 return 0;
 417         }
 418
 419         v = (const struct profile_stats *)value.dptr;
 420
 421         if (v->magic != profile_p->magic) {
 422                 return 0;
 423         }
 424
 425         smbprofile_stats_accumulate(acc, v);
 426         return 0;
 427 }
 428
 429 void smbprofile_collect(struct profile_stats *stats)
 430 {
 431         *stats = (struct profile_stats) {};
 432
 433         if (smbprofile_state.internal.db == NULL) {
 434                 return;
 435         }
 436
 437         tdb_traverse_read(smbprofile_state.internal.db->tdb,
 438                           smbprofile_collect_fn, stats);
 439 }