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