lustre/llite/lproc_llite.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  *
   6  *   This file is part of Lustre, http://www.lustre.org.
   7  *
   8  *   Lustre is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Lustre 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 Lustre; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  */
  22 #define DEBUG_SUBSYSTEM S_LLITE
  23
  24 #include <linux/version.h>
  25 #include <lustre_lite.h>
  26 #include <lprocfs_status.h>
  27 #include <linux/seq_file.h>
  28 #include <obd_support.h>
  29
  30 #include "llite_internal.h"
  31
  32 struct proc_dir_entry *proc_lustre_fs_root;
  33
  34 #ifdef LPROCFS
  35 /* /proc/lustre/llite mount point registration */
  36 struct file_operations llite_dump_pgcache_fops;
  37 struct file_operations ll_ra_stats_fops;
  38 struct file_operations ll_rw_extents_stats_fops;
  39 struct file_operations ll_rw_extents_stats_pp_fops;
  40 struct file_operations ll_rw_offset_stats_fops;
  41
  42 static int ll_rd_blksize(char *page, char **start, off_t off, int count,
  43                          int *eof, void *data)
  44 {
  45         struct super_block *sb = (struct super_block *)data;
  46         struct obd_statfs osfs;
  47         int rc;
  48
  49         LASSERT(sb != NULL);
  50         rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - HZ,
  51                                 OBD_STATFS_NODELAY);
  52         if (!rc) {
  53               *eof = 1;
  54               rc = snprintf(page, count, "%u\n", osfs.os_bsize);
  55         }
  56
  57         return rc;
  58 }
  59
  60 static int ll_rd_kbytestotal(char *page, char **start, off_t off, int count,
  61                              int *eof, void *data)
  62 {
  63         struct super_block *sb = (struct super_block *)data;
  64         struct obd_statfs osfs;
  65         int rc;
  66
  67         LASSERT(sb != NULL);
  68         rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - HZ,
  69                                 OBD_STATFS_NODELAY);
  70         if (!rc) {
  71                 __u32 blk_size = osfs.os_bsize >> 10;
  72                 __u64 result = osfs.os_blocks;
  73
  74                 while (blk_size >>= 1)
  75                         result <<= 1;
  76
  77                 *eof = 1;
  78                 rc = snprintf(page, count, LPU64"\n", result);
  79         }
  80         return rc;
  81
  82 }
  83
  84 static int ll_rd_kbytesfree(char *page, char **start, off_t off, int count,
  85                             int *eof, void *data)
  86 {
  87         struct super_block *sb = (struct super_block *)data;
  88         struct obd_statfs osfs;
  89         int rc;
  90
  91         LASSERT(sb != NULL);
  92         rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - HZ,
  93                                 OBD_STATFS_NODELAY);
  94         if (!rc) {
  95                 __u32 blk_size = osfs.os_bsize >> 10;
  96                 __u64 result = osfs.os_bfree;
  97
  98                 while (blk_size >>= 1)
  99                         result <<= 1;
 100
 101                 *eof = 1;
 102                 rc = snprintf(page, count, LPU64"\n", result);
 103         }
 104         return rc;
 105 }
 106
 107 static int ll_rd_kbytesavail(char *page, char **start, off_t off, int count,
 108                              int *eof, void *data)
 109 {
 110         struct super_block *sb = (struct super_block *)data;
 111         struct obd_statfs osfs;
 112         int rc;
 113
 114         LASSERT(sb != NULL);
 115         rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - HZ,
 116                                 OBD_STATFS_NODELAY);
 117         if (!rc) {
 118                 __u32 blk_size = osfs.os_bsize >> 10;
 119                 __u64 result = osfs.os_bavail;
 120
 121                 while (blk_size >>= 1)
 122                         result <<= 1;
 123
 124                 *eof = 1;
 125                 rc = snprintf(page, count, LPU64"\n", result);
 126         }
 127         return rc;
 128 }
 129
 130 static int ll_rd_filestotal(char *page, char **start, off_t off, int count,
 131                             int *eof, void *data)
 132 {
 133         struct super_block *sb = (struct super_block *)data;
 134         struct obd_statfs osfs;
 135         int rc;
 136
 137         LASSERT(sb != NULL);
 138         rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - HZ,
 139                                 OBD_STATFS_NODELAY);
 140         if (!rc) {
 141                  *eof = 1;
 142                  rc = snprintf(page, count, LPU64"\n", osfs.os_files);
 143         }
 144         return rc;
 145 }
 146
 147 static int ll_rd_filesfree(char *page, char **start, off_t off, int count,
 148                            int *eof, void *data)
 149 {
 150         struct super_block *sb = (struct super_block *)data;
 151         struct obd_statfs osfs;
 152         int rc;
 153
 154         LASSERT(sb != NULL);
 155         rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - HZ,
 156                                 OBD_STATFS_NODELAY);
 157         if (!rc) {
 158                  *eof = 1;
 159                  rc = snprintf(page, count, LPU64"\n", osfs.os_ffree);
 160         }
 161         return rc;
 162
 163 }
 164
 165 static int ll_rd_client_type(char *page, char **start, off_t off, int count,
 166                             int *eof, void *data)
 167 {
 168         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)data);
 169         int rc;
 170
 171         LASSERT(sbi != NULL);
 172
 173         *eof = 1;
 174         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 175                 rc = snprintf(page, count, "remote client\n");
 176         else
 177                 rc = snprintf(page, count, "local client\n");
 178
 179         return rc;
 180 }
 181
 182 static int ll_rd_fstype(char *page, char **start, off_t off, int count,
 183                         int *eof, void *data)
 184 {
 185         struct super_block *sb = (struct super_block*)data;
 186
 187         LASSERT(sb != NULL);
 188         *eof = 1;
 189         return snprintf(page, count, "%s\n", sb->s_type->name);
 190 }
 191
 192 static int ll_rd_sb_uuid(char *page, char **start, off_t off, int count,
 193                          int *eof, void *data)
 194 {
 195         struct super_block *sb = (struct super_block *)data;
 196
 197         LASSERT(sb != NULL);
 198         *eof = 1;
 199         return snprintf(page, count, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
 200 }
 201
 202 static int ll_rd_max_readahead_mb(char *page, char **start, off_t off,
 203                                    int count, int *eof, void *data)
 204 {
 205         struct super_block *sb = data;
 206         struct ll_sb_info *sbi = ll_s2sbi(sb);
 207         long pages_number;
 208         int mult;
 209
 210         spin_lock(&sbi->ll_lock);
 211         pages_number = sbi->ll_ra_info.ra_max_pages;
 212         spin_unlock(&sbi->ll_lock);
 213
 214         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 215         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 216 }
 217
 218 static int ll_wr_max_readahead_mb(struct file *file, const char *buffer,
 219                                    unsigned long count, void *data)
 220 {
 221         struct super_block *sb = data;
 222         struct ll_sb_info *sbi = ll_s2sbi(sb);
 223         int mult, rc, pages_number;
 224
 225         mult = 1 << (20 - CFS_PAGE_SHIFT);
 226         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 227         if (rc)
 228                 return rc;
 229
 230         if (pages_number < 0 || pages_number > num_physpages / 2) {
 231                 CERROR("can't set file readahead more than %lu MB\n",
 232                         num_physpages >> (20 - CFS_PAGE_SHIFT + 1)); /*1/2 of RAM*/
 233                 return -ERANGE;
 234         }
 235
 236         spin_lock(&sbi->ll_lock);
 237         sbi->ll_ra_info.ra_max_pages = pages_number;
 238         spin_unlock(&sbi->ll_lock);
 239
 240         return count;
 241 }
 242
 243 static int ll_rd_max_read_ahead_whole_mb(char *page, char **start, off_t off,
 244                                        int count, int *eof, void *data)
 245 {
 246         struct super_block *sb = data;
 247         struct ll_sb_info *sbi = ll_s2sbi(sb);
 248         long pages_number;
 249         int mult;
 250
 251         spin_lock(&sbi->ll_lock);
 252         pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
 253         spin_unlock(&sbi->ll_lock);
 254
 255         mult = 1 << (20 - CFS_PAGE_SHIFT);
 256         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 257 }
 258
 259 static int ll_wr_max_read_ahead_whole_mb(struct file *file, const char *buffer,
 260                                        unsigned long count, void *data)
 261 {
 262         struct super_block *sb = data;
 263         struct ll_sb_info *sbi = ll_s2sbi(sb);
 264         int mult, rc, pages_number;
 265
 266         mult = 1 << (20 - CFS_PAGE_SHIFT);
 267         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 268         if (rc)
 269                 return rc;
 270
 271         /* Cap this at the current max readahead window size, the readahead
 272          * algorithm does this anyway so it's pointless to set it larger. */
 273         if (pages_number < 0 || pages_number > sbi->ll_ra_info.ra_max_pages) {
 274                 CERROR("can't set max_read_ahead_whole_mb more than "
 275                        "max_read_ahead_mb: %lu\n",
 276                        sbi->ll_ra_info.ra_max_pages >> (20 - CFS_PAGE_SHIFT));
 277                 return -ERANGE;
 278         }
 279
 280         spin_lock(&sbi->ll_lock);
 281         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 282         spin_unlock(&sbi->ll_lock);
 283
 284         return count;
 285 }
 286
 287 static int ll_rd_max_cached_mb(char *page, char **start, off_t off,
 288                                int count, int *eof, void *data)
 289 {
 290         struct super_block *sb = data;
 291         struct ll_sb_info *sbi = ll_s2sbi(sb);
 292         long pages_number;
 293         int mult;
 294
 295         spin_lock(&sbi->ll_lock);
 296         pages_number = sbi->ll_async_page_max;
 297         spin_unlock(&sbi->ll_lock);
 298
 299         mult = 1 << (20 - CFS_PAGE_SHIFT);
 300         return lprocfs_read_frac_helper(page, count, pages_number, mult);;
 301 }
 302
 303 static int ll_wr_max_cached_mb(struct file *file, const char *buffer,
 304                                   unsigned long count, void *data)
 305 {
 306         struct super_block *sb = data;
 307         struct ll_sb_info *sbi = ll_s2sbi(sb);
 308         int mult, rc, pages_number;
 309
 310         mult = 1 << (20 - CFS_PAGE_SHIFT);
 311         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 312         if (rc)
 313                 return rc;
 314
 315         if (pages_number < 0 || pages_number > num_physpages) {
 316                 CERROR("can't set max cache more than %lu MB\n",
 317                         num_physpages >> (20 - CFS_PAGE_SHIFT));
 318                 return -ERANGE;
 319         }
 320
 321         spin_lock(&sbi->ll_lock);
 322         sbi->ll_async_page_max = pages_number ;
 323         spin_unlock(&sbi->ll_lock);
 324
 325         if (!sbi->ll_dt_exp)
 326                 /* Not set up yet, don't call llap_shrink_cache */
 327                 return count;
 328
 329         if (sbi->ll_async_page_count >= sbi->ll_async_page_max)
 330                 llap_shrink_cache(sbi, 0);
 331
 332         return count;
 333 }
 334
 335 static int ll_rd_checksum(char *page, char **start, off_t off,
 336                           int count, int *eof, void *data)
 337 {
 338         struct super_block *sb = data;
 339         struct ll_sb_info *sbi = ll_s2sbi(sb);
 340
 341         return snprintf(page, count, "%u\n",
 342                         (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 343 }
 344
 345 static int ll_wr_checksum(struct file *file, const char *buffer,
 346                           unsigned long count, void *data)
 347 {
 348         struct super_block *sb = data;
 349         struct ll_sb_info *sbi = ll_s2sbi(sb);
 350         int val, rc;
 351
 352         if (!sbi->ll_dt_exp)
 353                 /* Not set up yet */
 354                 return -EAGAIN;
 355
 356         rc = lprocfs_write_helper(buffer, count, &val);
 357         if (rc)
 358                 return rc;
 359         if (val)
 360                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 361         else
 362                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 363
 364         rc = obd_set_info_async(sbi->ll_dt_exp, strlen("checksum"), "checksum",
 365                                 sizeof(val), &val, NULL);
 366         if (rc)
 367                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 368
 369         return count;
 370 }
 371
 372 static int ll_rd_max_rw_chunk(char *page, char **start, off_t off,
 373                           int count, int *eof, void *data)
 374 {
 375         struct super_block *sb = data;
 376
 377         return snprintf(page, count, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk);
 378 }
 379
 380 static int ll_wr_max_rw_chunk(struct file *file, const char *buffer,
 381                           unsigned long count, void *data)
 382 {
 383         struct super_block *sb = data;
 384         int rc, val;
 385
 386         rc = lprocfs_write_helper(buffer, count, &val);
 387         if (rc)
 388                 return rc;
 389         ll_s2sbi(sb)->ll_max_rw_chunk = val;
 390         return count;
 391 }
 392
 393 static int ll_rd_track_id(char *page, int count, void *data,
 394                           enum stats_track_type type)
 395 {
 396         struct super_block *sb = data;
 397
 398         if (ll_s2sbi(sb)->ll_stats_track_type == type) {
 399                 return snprintf(page, count, "%d\n",
 400                                 ll_s2sbi(sb)->ll_stats_track_id);
 401
 402         } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
 403                 return snprintf(page, count, "0 (all)\n");
 404         } else {
 405                 return snprintf(page, count, "untracked\n");
 406         }
 407 }
 408
 409 static int ll_wr_track_id(const char *buffer, unsigned long count, void *data,
 410                           enum stats_track_type type)
 411 {
 412         struct super_block *sb = data;
 413         int rc, pid;
 414
 415         rc = lprocfs_write_helper(buffer, count, &pid);
 416         if (rc)
 417                 return rc;
 418         ll_s2sbi(sb)->ll_stats_track_id = pid;
 419         if (pid == 0)
 420                 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
 421         else
 422                 ll_s2sbi(sb)->ll_stats_track_type = type;
 423         lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
 424         return count;
 425 }
 426
 427 static int ll_rd_track_pid(char *page, char **start, off_t off,
 428                           int count, int *eof, void *data)
 429 {
 430         return (ll_rd_track_id(page, count, data, STATS_TRACK_PID));
 431 }
 432
 433 static int ll_wr_track_pid(struct file *file, const char *buffer,
 434                           unsigned long count, void *data)
 435 {
 436         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PID));
 437 }
 438
 439 static int ll_rd_track_ppid(char *page, char **start, off_t off,
 440                           int count, int *eof, void *data)
 441 {
 442         return (ll_rd_track_id(page, count, data, STATS_TRACK_PPID));
 443 }
 444
 445 static int ll_wr_track_ppid(struct file *file, const char *buffer,
 446                           unsigned long count, void *data)
 447 {
 448         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PPID));
 449 }
 450
 451 static int ll_rd_track_gid(char *page, char **start, off_t off,
 452                           int count, int *eof, void *data)
 453 {
 454         return (ll_rd_track_id(page, count, data, STATS_TRACK_GID));
 455 }
 456
 457 static int ll_wr_track_gid(struct file *file, const char *buffer,
 458                           unsigned long count, void *data)
 459 {
 460         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_GID));
 461 }
 462
 463 static int ll_rd_contention_time(char *page, char **start, off_t off,
 464                                  int count, int *eof, void *data)
 465 {
 466         struct super_block *sb = data;
 467
 468         *eof = 1;
 469         return snprintf(page, count, "%u\n", ll_s2sbi(sb)->ll_contention_time);
 470
 471 }
 472
 473 static int ll_wr_contention_time(struct file *file, const char *buffer,
 474                                  unsigned long count, void *data)
 475 {
 476         struct super_block *sb = data;
 477         struct ll_sb_info *sbi = ll_s2sbi(sb);
 478
 479         return lprocfs_write_helper(buffer, count,&sbi->ll_contention_time) ?:
 480                 count;
 481 }
 482
 483 static int ll_rd_lockless_truncate(char *page, char **start, off_t off,
 484                                    int count, int *eof, void *data)
 485 {
 486         struct super_block *sb = data;
 487
 488         *eof = 1;
 489         return snprintf(page, count, "%u\n",
 490                         ll_s2sbi(sb)->ll_lockless_truncate_enable);
 491 }
 492
 493 static int ll_wr_lockless_truncate(struct file *file, const char *buffer,
 494                                    unsigned long count, void *data)
 495 {
 496         struct super_block *sb = data;
 497         struct ll_sb_info *sbi = ll_s2sbi(sb);
 498
 499         return lprocfs_write_helper(buffer, count,
 500                                     &sbi->ll_lockless_truncate_enable)
 501                                     ?: count;
 502 }
 503
 504 static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
 505         { "uuid",         ll_rd_sb_uuid,          0, 0 },
 506         //{ "mntpt_path",   ll_rd_path,             0, 0 },
 507         { "fstype",       ll_rd_fstype,           0, 0 },
 508         { "blocksize",    ll_rd_blksize,          0, 0 },
 509         { "kbytestotal",  ll_rd_kbytestotal,      0, 0 },
 510         { "kbytesfree",   ll_rd_kbytesfree,       0, 0 },
 511         { "kbytesavail",  ll_rd_kbytesavail,      0, 0 },
 512         { "filestotal",   ll_rd_filestotal,       0, 0 },
 513         { "filesfree",    ll_rd_filesfree,        0, 0 },
 514         { "client_type",  ll_rd_client_type,      0, 0 },
 515         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
 516         { "max_read_ahead_mb", ll_rd_max_readahead_mb,
 517                                ll_wr_max_readahead_mb, 0 },
 518         { "max_read_ahead_whole_mb", ll_rd_max_read_ahead_whole_mb,
 519                                      ll_wr_max_read_ahead_whole_mb, 0 },
 520         { "max_cached_mb",    ll_rd_max_cached_mb, ll_wr_max_cached_mb, 0 },
 521         { "checksum_pages",   ll_rd_checksum, ll_wr_checksum, 0 },
 522         { "max_rw_chunk",     ll_rd_max_rw_chunk, ll_wr_max_rw_chunk, 0 },
 523         { "stats_track_pid",  ll_rd_track_pid, ll_wr_track_pid, 0 },
 524         { "stats_track_ppid", ll_rd_track_ppid, ll_wr_track_ppid, 0 },
 525         { "stats_track_gid",  ll_rd_track_gid, ll_wr_track_gid, 0 },
 526         { "contention_seconds", ll_rd_contention_time, ll_wr_contention_time, 0},
 527         { "lockless_truncate", ll_rd_lockless_truncate,
 528                                ll_wr_lockless_truncate, 0},
 529         { 0 }
 530 };
 531
 532 #define MAX_STRING_SIZE 128
 533
 534 struct llite_file_opcode {
 535         __u32       opcode;
 536         __u32       type;
 537         const char *opname;
 538 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 539         /* file operation */
 540         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 541         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 542         { LPROC_LL_WB_WRITEPAGE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 543                                    "writeback_from_writepage" },
 544         { LPROC_LL_WB_PRESSURE,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 545                                    "writeback_from_pressure" },
 546         { LPROC_LL_WB_OK,          LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 547                                    "writeback_ok_pages" },
 548         { LPROC_LL_WB_FAIL,        LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 549                                    "writeback_failed_pages" },
 550         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 551                                    "read_bytes" },
 552         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 553                                    "write_bytes" },
 554         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 555                                    "brw_read" },
 556         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 557                                    "brw_write" },
 558
 559         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
 560         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 561         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
 562         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
 563         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
 564         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
 565         /* inode operation */
 566         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
 567         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "truncate" },
 568         { LPROC_LL_LOCKLESS_TRUNC, LPROCFS_TYPE_REGS, "lockless_truncate"},
 569         { LPROC_LL_FLOCK,          LPROCFS_TYPE_REGS, "flock" },
 570         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
 571         /* special inode operation */
 572         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
 573         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 574         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 575         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 576         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
 577         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
 578         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
 579         { LPROC_LL_DIRECT_READ,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 580                                    "direct_read" },
 581         { LPROC_LL_DIRECT_WRITE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 582                                    "direct_write" },
 583         { LPROC_LL_LOCKLESS_READ,  LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 584                                    "lockless_read_bytes" },
 585         { LPROC_LL_LOCKLESS_WRITE, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 586                                    "lockless_write_bytes" },
 587
 588 };
 589
 590 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
 591 {
 592         if (!sbi->ll_stats)
 593                 return;
 594         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 595                 lprocfs_counter_add(sbi->ll_stats, op, count);
 596         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
 597                  sbi->ll_stats_track_id == current->pid)
 598                 lprocfs_counter_add(sbi->ll_stats, op, count);
 599         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
 600                  sbi->ll_stats_track_id == current->p_pptr->pid)
 601                 lprocfs_counter_add(sbi->ll_stats, op, count);
 602         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
 603                  sbi->ll_stats_track_id == current->gid)
 604                 lprocfs_counter_add(sbi->ll_stats, op, count);
 605 }
 606 EXPORT_SYMBOL(ll_stats_ops_tally);
 607
 608 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 609                                 struct super_block *sb, char *osc, char *mdc)
 610 {
 611         struct lprocfs_vars lvars[2];
 612         struct lustre_sb_info *lsi = s2lsi(sb);
 613         struct ll_sb_info *sbi = ll_s2sbi(sb);
 614         struct obd_device *obd;
 615         char name[MAX_STRING_SIZE + 1], *ptr;
 616         int err, id, len, rc;
 617         ENTRY;
 618
 619         memset(lvars, 0, sizeof(lvars));
 620
 621         name[MAX_STRING_SIZE] = '\0';
 622         lvars[0].name = name;
 623
 624         LASSERT(sbi != NULL);
 625         LASSERT(mdc != NULL);
 626         LASSERT(osc != NULL);
 627
 628         /* Get fsname */
 629         len = strlen(lsi->lsi_lmd->lmd_profile);
 630         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
 631         if (ptr && (strcmp(ptr, "-client") == 0))
 632                 len -= 7;
 633
 634         /* Mount info */
 635         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
 636                  lsi->lsi_lmd->lmd_profile, sb);
 637
 638         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 639         if (IS_ERR(sbi->ll_proc_root)) {
 640                 err = PTR_ERR(sbi->ll_proc_root);
 641                 sbi->ll_proc_root = NULL;
 642                 RETURN(err);
 643         }
 644
 645
 646         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
 647                                 &llite_dump_pgcache_fops, sbi);
 648         if (rc)
 649                 CWARN("Error adding the dump_page_cache file\n");
 650
 651         rc = lprocfs_seq_create(sbi->ll_proc_root, "read_ahead_stats", 0644,
 652                                 &ll_ra_stats_fops, sbi);
 653         if (rc)
 654                 CWARN("Error adding the read_ahead_stats file\n");
 655
 656         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
 657                                 &ll_rw_extents_stats_fops, sbi);
 658         if (rc)
 659                 CWARN("Error adding the extent_stats file\n");
 660
 661         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
 662                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
 663         if (rc)
 664                 CWARN("Error adding the extents_stats_per_process file\n");
 665
 666         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
 667                                 &ll_rw_offset_stats_fops, sbi);
 668         if (rc)
 669                 CWARN("Error adding the offset_stats file\n");
 670
 671         /* File operations stats */
 672         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
 673                                             LPROCFS_STATS_FLAG_PERCPU);
 674         if (sbi->ll_stats == NULL)
 675                 GOTO(out, err = -ENOMEM);
 676         /* do counter init */
 677         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
 678                 __u32 type = llite_opcode_table[id].type;
 679                 void *ptr = NULL;
 680                 if (type & LPROCFS_TYPE_REGS)
 681                         ptr = "regs";
 682                 else if (type & LPROCFS_TYPE_BYTES)
 683                         ptr = "bytes";
 684                 else if (type & LPROCFS_TYPE_PAGES)
 685                         ptr = "pages";
 686                 lprocfs_counter_init(sbi->ll_stats,
 687                                      llite_opcode_table[id].opcode,
 688                                      (type & LPROCFS_CNTR_AVGMINMAX),
 689                                      llite_opcode_table[id].opname, ptr);
 690         }
 691         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
 692         if (err)
 693                 GOTO(out, err);
 694
 695         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
 696         if (err)
 697                 GOTO(out, err);
 698
 699         /* MDC info */
 700         obd = class_name2obd(mdc);
 701
 702         LASSERT(obd != NULL);
 703         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 704         LASSERT(obd->obd_type->typ_name != NULL);
 705
 706         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 707                  obd->obd_type->typ_name);
 708         lvars[0].read_fptr = lprocfs_rd_name;
 709         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 710         if (err)
 711                 GOTO(out, err);
 712
 713         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 714         lvars[0].read_fptr = lprocfs_rd_uuid;
 715         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 716         if (err)
 717                 GOTO(out, err);
 718
 719         /* OSC */
 720         obd = class_name2obd(osc);
 721
 722         LASSERT(obd != NULL);
 723         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 724         LASSERT(obd->obd_type->typ_name != NULL);
 725
 726         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 727                  obd->obd_type->typ_name);
 728         lvars[0].read_fptr = lprocfs_rd_name;
 729         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 730         if (err)
 731                 GOTO(out, err);
 732
 733         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 734         lvars[0].read_fptr = lprocfs_rd_uuid;
 735         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 736 out:
 737         if (err) {
 738                 lprocfs_remove(&sbi->ll_proc_root);
 739                 lprocfs_free_stats(&sbi->ll_stats);
 740         }
 741         RETURN(err);
 742 }
 743
 744 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
 745 {
 746         if (sbi->ll_proc_root) {
 747                 lprocfs_remove(&sbi->ll_proc_root);
 748                 lprocfs_free_stats(&sbi->ll_stats);
 749         }
 750 }
 751 #undef MAX_STRING_SIZE
 752
 753 #define seq_page_flag(seq, page, flag, has_flags) do {                  \
 754                 if (test_bit(PG_##flag, &(page)->flags)) {              \
 755                         if (!has_flags)                                 \
 756                                 has_flags = 1;                          \
 757                         else                                            \
 758                                 seq_putc(seq, '|');                     \
 759                         seq_puts(seq, #flag);                           \
 760                 }                                                       \
 761         } while(0);
 762
 763 static void *llite_dump_pgcache_seq_start(struct seq_file *seq, loff_t *pos)
 764 {
 765         struct ll_async_page *dummy_llap = seq->private;
 766
 767         if (dummy_llap->llap_magic == 2)
 768                 return NULL;
 769
 770         return (void *)1;
 771 }
 772
 773 static int llite_dump_pgcache_seq_show(struct seq_file *seq, void *v)
 774 {
 775         struct ll_async_page *llap, *dummy_llap = seq->private;
 776         struct ll_sb_info *sbi = dummy_llap->llap_cookie;
 777
 778         /* 2.4 doesn't seem to have SEQ_START_TOKEN, so we implement
 779          * it in our own state */
 780         if (dummy_llap->llap_magic == 0) {
 781                 seq_printf(seq, "gener |  llap  cookie  origin wq du wb | page "
 782                                 "inode index count [ page flags ]\n");
 783                 return 0;
 784         }
 785
 786         spin_lock(&sbi->ll_lock);
 787
 788         llap = llite_pglist_next_llap(sbi, &dummy_llap->llap_pglist_item);
 789         if (llap != NULL)  {
 790                 int has_flags = 0;
 791                 struct page *page = llap->llap_page;
 792
 793                 LASSERTF(llap->llap_origin < LLAP__ORIGIN_MAX, "%u\n",
 794                          llap->llap_origin);
 795
 796                 seq_printf(seq," %5lu | %p %p %s %s %s %s | %p %lu/%u(%p) "
 797                            "%lu %u [",
 798                            sbi->ll_pglist_gen,
 799                            llap, llap->llap_cookie,
 800                            llap_origins[llap->llap_origin],
 801                            llap->llap_write_queued ? "wq" : "- ",
 802                            llap->llap_defer_uptodate ? "du" : "- ",
 803                            PageWriteback(page) ? "wb" : "-",
 804                            page, page->mapping->host->i_ino,
 805                            page->mapping->host->i_generation,
 806                            page->mapping->host, page->index,
 807                            page_count(page));
 808                 seq_page_flag(seq, page, locked, has_flags);
 809                 seq_page_flag(seq, page, error, has_flags);
 810                 seq_page_flag(seq, page, referenced, has_flags);
 811                 seq_page_flag(seq, page, uptodate, has_flags);
 812                 seq_page_flag(seq, page, dirty, has_flags);
 813 #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,12))
 814                 seq_page_flag(seq, page, highmem, has_flags);
 815 #endif
 816                 seq_page_flag(seq, page, writeback, has_flags);
 817                 if (!has_flags)
 818                         seq_puts(seq, "-]\n");
 819                 else
 820                         seq_puts(seq, "]\n");
 821         }
 822
 823         spin_unlock(&sbi->ll_lock);
 824
 825         return 0;
 826 }
 827
 828 static void *llite_dump_pgcache_seq_next(struct seq_file *seq, void *v,
 829                                          loff_t *pos)
 830 {
 831         struct ll_async_page *llap, *dummy_llap = seq->private;
 832         struct ll_sb_info *sbi = dummy_llap->llap_cookie;
 833
 834         /* bail if we just displayed the banner */
 835         if (dummy_llap->llap_magic == 0) {
 836                 dummy_llap->llap_magic = 1;
 837                 return dummy_llap;
 838         }
 839
 840         /* we've just displayed the llap that is after us in the list.
 841          * we advance to a position beyond it, returning null if there
 842          * isn't another llap in the list beyond that new position. */
 843         spin_lock(&sbi->ll_lock);
 844         llap = llite_pglist_next_llap(sbi, &dummy_llap->llap_pglist_item);
 845         list_del_init(&dummy_llap->llap_pglist_item);
 846         if (llap) {
 847                 list_add(&dummy_llap->llap_pglist_item,&llap->llap_pglist_item);
 848                 llap =llite_pglist_next_llap(sbi,&dummy_llap->llap_pglist_item);
 849         }
 850         spin_unlock(&sbi->ll_lock);
 851
 852         ++*pos;
 853         if (llap == NULL) {
 854                 dummy_llap->llap_magic = 2;
 855                 return NULL;
 856         }
 857         return dummy_llap;
 858 }
 859
 860 static void null_stop(struct seq_file *seq, void *v)
 861 {
 862 }
 863
 864 struct seq_operations llite_dump_pgcache_seq_sops = {
 865         .start = llite_dump_pgcache_seq_start,
 866         .stop = null_stop,
 867         .next = llite_dump_pgcache_seq_next,
 868         .show = llite_dump_pgcache_seq_show,
 869 };
 870
 871 /* we're displaying llaps in a list_head list.  we don't want to hold a lock
 872  * while we walk the entire list, and we don't want to have to seek into
 873  * the right position in the list as an app advances with many syscalls.  we
 874  * allocate a dummy llap and hang it off file->private.  its position in
 875  * the list records where the app is currently displaying.  this way our
 876  * seq .start and .stop don't actually do anything.  .next returns null
 877  * when the dummy hits the end of the list which eventually leads to .release
 878  * where we tear down.  this kind of displaying is super-racey, so we put
 879  * a generation counter on the list so the output shows when the list
 880  * changes between reads.
 881  */
 882 static int llite_dump_pgcache_seq_open(struct inode *inode, struct file *file)
 883 {
 884         struct proc_dir_entry *dp = PDE(inode);
 885         struct ll_async_page *dummy_llap;
 886         struct seq_file *seq;
 887         struct ll_sb_info *sbi = dp->data;
 888         int rc = -ENOMEM;
 889
 890         LPROCFS_ENTRY_AND_CHECK(dp);
 891
 892         OBD_ALLOC_PTR_WAIT(dummy_llap);
 893         if (dummy_llap == NULL)
 894                 GOTO(out, rc);
 895         dummy_llap->llap_page = NULL;
 896         dummy_llap->llap_cookie = sbi;
 897         dummy_llap->llap_magic = 0;
 898
 899         rc = seq_open(file, &llite_dump_pgcache_seq_sops);
 900         if (rc) {
 901                 OBD_FREE(dummy_llap, sizeof(*dummy_llap));
 902                 GOTO(out, rc);
 903         }
 904         seq = file->private_data;
 905         seq->private = dummy_llap;
 906
 907         spin_lock(&sbi->ll_lock);
 908         list_add(&dummy_llap->llap_pglist_item, &sbi->ll_pglist);
 909         spin_unlock(&sbi->ll_lock);
 910
 911 out:
 912         if (rc)
 913                 LPROCFS_EXIT();
 914         return rc;
 915 }
 916
 917 static int llite_dump_pgcache_seq_release(struct inode *inode,
 918                                           struct file *file)
 919 {
 920         struct seq_file *seq = file->private_data;
 921         struct ll_async_page *dummy_llap = seq->private;
 922         struct ll_sb_info *sbi = dummy_llap->llap_cookie;
 923
 924         spin_lock(&sbi->ll_lock);
 925         if (!list_empty(&dummy_llap->llap_pglist_item))
 926                 list_del_init(&dummy_llap->llap_pglist_item);
 927         spin_unlock(&sbi->ll_lock);
 928         OBD_FREE(dummy_llap, sizeof(*dummy_llap));
 929
 930         return lprocfs_seq_release(inode, file);
 931 }
 932
 933 struct file_operations llite_dump_pgcache_fops = {
 934         .owner   = THIS_MODULE,
 935         .open    = llite_dump_pgcache_seq_open,
 936         .read    = seq_read,
 937         .release = llite_dump_pgcache_seq_release,
 938 };
 939
 940 static int ll_ra_stats_seq_show(struct seq_file *seq, void *v)
 941 {
 942         struct timeval now;
 943         struct ll_sb_info *sbi = seq->private;
 944         struct ll_ra_info *ra = &sbi->ll_ra_info;
 945         int i;
 946         static char *ra_stat_strings[] = {
 947                 [RA_STAT_HIT] = "hits",
 948                 [RA_STAT_MISS] = "misses",
 949                 [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 950                 [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 951                 [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
 952                 [RA_STAT_FAILED_MATCH] = "failed lock match",
 953                 [RA_STAT_DISCARDED] = "read but discarded",
 954                 [RA_STAT_ZERO_LEN] = "zero length file",
 955                 [RA_STAT_ZERO_WINDOW] = "zero size window",
 956                 [RA_STAT_EOF] = "read-ahead to EOF",
 957                 [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 958                 [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
 959         };
 960
 961         do_gettimeofday(&now);
 962
 963         spin_lock(&sbi->ll_lock);
 964
 965         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 966                    now.tv_sec, now.tv_usec);
 967         seq_printf(seq, "pending issued pages:           %lu\n",
 968                    ra->ra_cur_pages);
 969
 970         for(i = 0; i < _NR_RA_STAT; i++)
 971                 seq_printf(seq, "%-25s %lu\n", ra_stat_strings[i],
 972                            ra->ra_stats[i]);
 973
 974         spin_unlock(&sbi->ll_lock);
 975
 976         return 0;
 977 }
 978
 979 static ssize_t ll_ra_stats_seq_write(struct file *file, const char *buf,
 980                                        size_t len, loff_t *off)
 981 {
 982         struct seq_file *seq = file->private_data;
 983         struct ll_sb_info *sbi = seq->private;
 984         struct ll_ra_info *ra = &sbi->ll_ra_info;
 985
 986         spin_lock(&sbi->ll_lock);
 987         memset(ra->ra_stats, 0, sizeof(ra->ra_stats));
 988         spin_unlock(&sbi->ll_lock);
 989
 990         return len;
 991 }
 992
 993 LPROC_SEQ_FOPS(ll_ra_stats);
 994
 995 #define pct(a,b) (b ? a * 100 / b : 0)
 996
 997 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
 998                                    struct seq_file *seq, int which)
 999 {
1000         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1001         unsigned long start, end, r, w;
1002         char *unitp = "KMGTPEZY";
1003         int i, units = 10;
1004         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1005
1006         read_cum = 0;
1007         write_cum = 0;
1008         start = 0;
1009
1010         for(i = 0; i < LL_HIST_MAX; i++) {
1011                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1012                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1013         }
1014
1015         for(i = 0; i < LL_HIST_MAX; i++) {
1016                 r = pp_info->pp_r_hist.oh_buckets[i];
1017                 w = pp_info->pp_w_hist.oh_buckets[i];
1018                 read_cum += r;
1019                 write_cum += w;
1020                 end = 1 << (i + LL_HIST_START - units);
1021                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
1022                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
1023                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1024                            r, pct(r, read_tot), pct(read_cum, read_tot),
1025                            w, pct(w, write_tot), pct(write_cum, write_tot));
1026                 start = end;
1027                 if (start == 1<<10) {
1028                         start = 1;
1029                         units += 10;
1030                         unitp++;
1031                 }
1032                 if (read_cum == read_tot && write_cum == write_tot)
1033                         break;
1034         }
1035 }
1036
1037 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1038 {
1039         struct timeval now;
1040         struct ll_sb_info *sbi = seq->private;
1041         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1042         int k;
1043
1044         do_gettimeofday(&now);
1045
1046         if (!sbi->ll_rw_stats_on) {
1047                 seq_printf(seq, "Disabled\n"
1048                                 "Write anything in this file to activate\n");
1049                 return 0;
1050         }
1051         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1052                    now.tv_sec, now.tv_usec);
1053         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1054         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1055                    "extents", "calls", "%", "cum%",
1056                    "calls", "%", "cum%");
1057         spin_lock(&sbi->ll_pp_extent_lock);
1058         for(k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1059                 if(io_extents->pp_extents[k].pid != 0) {
1060                         seq_printf(seq, "\nPID: %d\n",
1061                                    io_extents->pp_extents[k].pid);
1062                         ll_display_extents_info(io_extents, seq, k);
1063                 }
1064         }
1065         spin_unlock(&sbi->ll_pp_extent_lock);
1066         return 0;
1067 }
1068
1069 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1070                                                 const char *buf, size_t len,
1071                                                 loff_t *off)
1072 {
1073         struct seq_file *seq = file->private_data;
1074         struct ll_sb_info *sbi = seq->private;
1075         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1076         int i;
1077
1078         sbi->ll_rw_stats_on = 1;
1079         spin_lock(&sbi->ll_pp_extent_lock);
1080         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1081                 io_extents->pp_extents[i].pid = 0;
1082                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1083                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1084         }
1085         spin_unlock(&sbi->ll_pp_extent_lock);
1086         return len;
1087 }
1088
1089 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1090
1091 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1092 {
1093         struct timeval now;
1094         struct ll_sb_info *sbi = seq->private;
1095         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1096
1097         do_gettimeofday(&now);
1098
1099         if (!sbi->ll_rw_stats_on) {
1100                 seq_printf(seq, "Disabled\n"
1101                                 "Write anything in this file to activate\n");
1102                 return 0;
1103         }
1104         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1105                    now.tv_sec, now.tv_usec);
1106
1107         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1108         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1109                    "extents", "calls", "%", "cum%",
1110                    "calls", "%", "cum%");
1111         spin_lock(&sbi->ll_lock);
1112         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1113         spin_unlock(&sbi->ll_lock);
1114
1115         return 0;
1116 }
1117
1118 static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf,
1119                                         size_t len, loff_t *off)
1120 {
1121         struct seq_file *seq = file->private_data;
1122         struct ll_sb_info *sbi = seq->private;
1123         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1124         int i;
1125
1126         sbi->ll_rw_stats_on = 1;
1127         spin_lock(&sbi->ll_pp_extent_lock);
1128         for(i = 0; i <= LL_PROCESS_HIST_MAX; i++)
1129         {
1130                 io_extents->pp_extents[i].pid = 0;
1131                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1132                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1133         }
1134         spin_unlock(&sbi->ll_pp_extent_lock);
1135
1136         return len;
1137 }
1138
1139 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1140
1141 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid, struct file
1142                                *file, size_t count, int rw)
1143 {
1144         int i, cur = -1;
1145         struct ll_rw_process_info *process;
1146         struct ll_rw_process_info *offset;
1147         int *off_count = &sbi->ll_rw_offset_entry_count;
1148         int *process_count = &sbi->ll_offset_process_count;
1149         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1150
1151         if(!sbi->ll_rw_stats_on)
1152                 return;
1153         process = sbi->ll_rw_process_info;
1154         offset = sbi->ll_rw_offset_info;
1155
1156         spin_lock(&sbi->ll_pp_extent_lock);
1157         /* Extent statistics */
1158         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1159                 if(io_extents->pp_extents[i].pid == pid) {
1160                         cur = i;
1161                         break;
1162                 }
1163         }
1164
1165         if (cur == -1) {
1166                 /* new process */
1167                 sbi->ll_extent_process_count =
1168                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1169                 cur = sbi->ll_extent_process_count;
1170                 io_extents->pp_extents[cur].pid = pid;
1171                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1172                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1173         }
1174
1175         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1176              (i < (LL_HIST_MAX - 1)); i++);
1177         if (rw == 0) {
1178                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1179                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1180         } else {
1181                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1182                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1183         }
1184         spin_unlock(&sbi->ll_pp_extent_lock);
1185
1186         spin_lock(&sbi->ll_process_lock);
1187         /* Offset statistics */
1188         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1189                 if (process[i].rw_pid == pid) {
1190                         if (process[i].rw_last_file != file) {
1191                                 process[i].rw_range_start = file->f_pos;
1192                                 process[i].rw_last_file_pos =
1193                                                         file->f_pos + count;
1194                                 process[i].rw_smallest_extent = count;
1195                                 process[i].rw_largest_extent = count;
1196                                 process[i].rw_offset = 0;
1197                                 process[i].rw_last_file = file;
1198                                 spin_unlock(&sbi->ll_process_lock);
1199                                 return;
1200                         }
1201                         if (process[i].rw_last_file_pos != file->f_pos) {
1202                                 *off_count =
1203                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1204                                 offset[*off_count].rw_op = process[i].rw_op;
1205                                 offset[*off_count].rw_pid = pid;
1206                                 offset[*off_count].rw_range_start =
1207                                         process[i].rw_range_start;
1208                                 offset[*off_count].rw_range_end =
1209                                         process[i].rw_last_file_pos;
1210                                 offset[*off_count].rw_smallest_extent =
1211                                         process[i].rw_smallest_extent;
1212                                 offset[*off_count].rw_largest_extent =
1213                                         process[i].rw_largest_extent;
1214                                 offset[*off_count].rw_offset =
1215                                         process[i].rw_offset;
1216                                 process[i].rw_op = rw;
1217                                 process[i].rw_range_start = file->f_pos;
1218                                 process[i].rw_smallest_extent = count;
1219                                 process[i].rw_largest_extent = count;
1220                                 process[i].rw_offset = file->f_pos -
1221                                         process[i].rw_last_file_pos;
1222                         }
1223                         if(process[i].rw_smallest_extent > count)
1224                                 process[i].rw_smallest_extent = count;
1225                         if(process[i].rw_largest_extent < count)
1226                                 process[i].rw_largest_extent = count;
1227                         process[i].rw_last_file_pos = file->f_pos + count;
1228                         spin_unlock(&sbi->ll_process_lock);
1229                         return;
1230                 }
1231         }
1232         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1233         process[*process_count].rw_pid = pid;
1234         process[*process_count].rw_op = rw;
1235         process[*process_count].rw_range_start = file->f_pos;
1236         process[*process_count].rw_last_file_pos = file->f_pos + count;
1237         process[*process_count].rw_smallest_extent = count;
1238         process[*process_count].rw_largest_extent = count;
1239         process[*process_count].rw_offset = 0;
1240         process[*process_count].rw_last_file = file;
1241         spin_unlock(&sbi->ll_process_lock);
1242 }
1243
1244 char lpszt[] = LPSZ;
1245
1246 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1247 {
1248         struct timeval now;
1249         struct ll_sb_info *sbi = seq->private;
1250         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1251         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1252         char format[50];
1253         int i;
1254
1255         do_gettimeofday(&now);
1256
1257         if (!sbi->ll_rw_stats_on) {
1258                 seq_printf(seq, "Disabled\n"
1259                                 "Write anything in this file to activate\n");
1260                 return 0;
1261         }
1262         spin_lock(&sbi->ll_process_lock);
1263
1264         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1265                    now.tv_sec, now.tv_usec);
1266         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1267                    "R/W", "PID", "RANGE START", "RANGE END",
1268                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1269         sprintf(format, "%s%s%s%s%s\n",
1270                 "%3c %10d %14Lu %14Lu %17", lpszt+1, " %17", lpszt+1, " %14Ld");
1271         /* We stored the discontiguous offsets here; print them first */
1272         for(i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1273                 if (offset[i].rw_pid != 0)
1274                         /* Is there a way to snip the '%' off of LPSZ? */
1275                         seq_printf(seq, format,
1276                                    offset[i].rw_op ? 'W' : 'R',
1277                                    offset[i].rw_pid,
1278                                    offset[i].rw_range_start,
1279                                    offset[i].rw_range_end,
1280                                    offset[i].rw_smallest_extent,
1281                                    offset[i].rw_largest_extent,
1282                                    offset[i].rw_offset);
1283         }
1284         /* Then print the current offsets for each process */
1285         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1286                 if (process[i].rw_pid != 0)
1287                         seq_printf(seq, format,
1288                                    process[i].rw_op ? 'W' : 'R',
1289                                    process[i].rw_pid,
1290                                    process[i].rw_range_start,
1291                                    process[i].rw_last_file_pos,
1292                                    process[i].rw_smallest_extent,
1293                                    process[i].rw_largest_extent,
1294                                    process[i].rw_offset);
1295         }
1296         spin_unlock(&sbi->ll_process_lock);
1297
1298         return 0;
1299 }
1300
1301 static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf,
1302                                        size_t len, loff_t *off)
1303 {
1304         struct seq_file *seq = file->private_data;
1305         struct ll_sb_info *sbi = seq->private;
1306         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1307         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1308
1309         sbi->ll_rw_stats_on = 1;
1310
1311         spin_lock(&sbi->ll_process_lock);
1312         sbi->ll_offset_process_count = 0;
1313         sbi->ll_rw_offset_entry_count = 0;
1314         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1315                LL_PROCESS_HIST_MAX);
1316         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1317                LL_OFFSET_HIST_MAX);
1318         spin_unlock(&sbi->ll_process_lock);
1319
1320         return len;
1321 }
1322
1323 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1324
1325 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
1326 {
1327     lvars->module_vars  = NULL;
1328     lvars->obd_vars     = lprocfs_llite_obd_vars;
1329 }
1330 #endif /* LPROCFS */