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 struct lprocfs_vars lprocfs_llite_obd_vars[] = {
 464         { "uuid",         ll_rd_sb_uuid,          0, 0 },
 465         //{ "mntpt_path",   ll_rd_path,             0, 0 },
 466         { "fstype",       ll_rd_fstype,           0, 0 },
 467         { "blocksize",    ll_rd_blksize,          0, 0 },
 468         { "kbytestotal",  ll_rd_kbytestotal,      0, 0 },
 469         { "kbytesfree",   ll_rd_kbytesfree,       0, 0 },
 470         { "kbytesavail",  ll_rd_kbytesavail,      0, 0 },
 471         { "filestotal",   ll_rd_filestotal,       0, 0 },
 472         { "filesfree",    ll_rd_filesfree,        0, 0 },
 473         { "client_type",  ll_rd_client_type,      0, 0 },
 474         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
 475         { "max_read_ahead_mb", ll_rd_max_readahead_mb,
 476                                ll_wr_max_readahead_mb, 0 },
 477         { "max_read_ahead_whole_mb", ll_rd_max_read_ahead_whole_mb,
 478                                      ll_wr_max_read_ahead_whole_mb, 0 },
 479         { "max_cached_mb",    ll_rd_max_cached_mb, ll_wr_max_cached_mb, 0 },
 480         { "checksum_pages",   ll_rd_checksum, ll_wr_checksum, 0 },
 481         { "max_rw_chunk",     ll_rd_max_rw_chunk, ll_wr_max_rw_chunk, 0 },
 482         { "stats_track_pid",  ll_rd_track_pid, ll_wr_track_pid, 0 },
 483         { "stats_track_ppid", ll_rd_track_ppid, ll_wr_track_ppid, 0 },
 484         { "stats_track_gid",  ll_rd_track_gid, ll_wr_track_gid, 0 },
 485         { 0 }
 486 };
 487
 488 #define MAX_STRING_SIZE 128
 489
 490 struct llite_file_opcode {
 491         __u32       opcode;
 492         __u32       type;
 493         const char *opname;
 494 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 495         /* file operation */
 496         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 497         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 498         { LPROC_LL_WB_WRITEPAGE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 499                                    "writeback_from_writepage" },
 500         { LPROC_LL_WB_PRESSURE,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 501                                    "writeback_from_pressure" },
 502         { LPROC_LL_WB_OK,          LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 503                                    "writeback_ok_pages" },
 504         { LPROC_LL_WB_FAIL,        LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 505                                    "writeback_failed_pages" },
 506         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 507                                    "read_bytes" },
 508         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 509                                    "write_bytes" },
 510         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 511                                    "brw_read" },
 512         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 513                                    "brw_write" },
 514
 515         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
 516         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 517         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
 518         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
 519         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
 520         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
 521         /* inode operation */
 522         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
 523         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "truncate" },
 524         { LPROC_LL_FLOCK,          LPROCFS_TYPE_REGS, "flock" },
 525         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
 526         /* special inode operation */
 527         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
 528         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 529         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 530         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 531         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
 532         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
 533         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
 534         { LPROC_LL_DIRECT_READ,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 535                                    "direct_read" },
 536         { LPROC_LL_DIRECT_WRITE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 537                                    "direct_write" },
 538
 539 };
 540
 541 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
 542 {
 543         if (!sbi->ll_stats)
 544                 return;
 545         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 546                 lprocfs_counter_add(sbi->ll_stats, op, count);
 547         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
 548                  sbi->ll_stats_track_id == current->pid)
 549                 lprocfs_counter_add(sbi->ll_stats, op, count);
 550         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
 551                  sbi->ll_stats_track_id == current->p_pptr->pid)
 552                 lprocfs_counter_add(sbi->ll_stats, op, count);
 553         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
 554                  sbi->ll_stats_track_id == current->gid)
 555                 lprocfs_counter_add(sbi->ll_stats, op, count);
 556 }
 557 EXPORT_SYMBOL(ll_stats_ops_tally);
 558
 559 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 560                                 struct super_block *sb, char *osc, char *mdc)
 561 {
 562         struct lprocfs_vars lvars[2];
 563         struct lustre_sb_info *lsi = s2lsi(sb);
 564         struct ll_sb_info *sbi = ll_s2sbi(sb);
 565         struct obd_device *obd;
 566         char name[MAX_STRING_SIZE + 1], *ptr;
 567         int err, id, len;
 568         struct proc_dir_entry *entry;
 569         ENTRY;
 570
 571         memset(lvars, 0, sizeof(lvars));
 572
 573         name[MAX_STRING_SIZE] = '\0';
 574         lvars[0].name = name;
 575
 576         LASSERT(sbi != NULL);
 577         LASSERT(mdc != NULL);
 578         LASSERT(osc != NULL);
 579
 580         /* Get fsname */
 581         len = strlen(lsi->lsi_lmd->lmd_profile);
 582         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
 583         if (ptr && (strcmp(ptr, "-client") == 0))
 584                 len -= 7;
 585
 586         /* Mount info */
 587         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
 588                  lsi->lsi_lmd->lmd_profile, sb);
 589
 590         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 591         if (IS_ERR(sbi->ll_proc_root)) {
 592                 err = PTR_ERR(sbi->ll_proc_root);
 593                 sbi->ll_proc_root = NULL;
 594                 RETURN(err);
 595         }
 596
 597         entry = create_proc_entry("dump_page_cache", 0444, sbi->ll_proc_root);
 598         if (entry == NULL)
 599                 GOTO(out, err = -ENOMEM);
 600         entry->proc_fops = &llite_dump_pgcache_fops;
 601         entry->data = sbi;
 602
 603         entry = create_proc_entry("read_ahead_stats", 0644, sbi->ll_proc_root);
 604         if (entry == NULL)
 605                 GOTO(out, err = -ENOMEM);
 606         entry->proc_fops = &ll_ra_stats_fops;
 607         entry->data = sbi;
 608
 609         entry = create_proc_entry("extents_stats", 0644, sbi->ll_proc_root);
 610         if (entry == NULL)
 611                  GOTO(out, err = -ENOMEM);
 612         entry->proc_fops = &ll_rw_extents_stats_fops;
 613         entry->data = sbi;
 614
 615         entry = create_proc_entry("extents_stats_per_process", 0644,
 616                                   sbi->ll_proc_root);
 617         if (entry == NULL)
 618                  GOTO(out, err = -ENOMEM);
 619         entry->proc_fops = &ll_rw_extents_stats_pp_fops;
 620         entry->data = sbi;
 621
 622         entry = create_proc_entry("offset_stats", 0644, sbi->ll_proc_root);
 623         if (entry == NULL)
 624                 GOTO(out, err = -ENOMEM);
 625         entry->proc_fops = &ll_rw_offset_stats_fops;
 626         entry->data = sbi;
 627
 628         /* File operations stats */
 629         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
 630                                             LPROCFS_STATS_FLAG_PERCPU);
 631         if (sbi->ll_stats == NULL)
 632                 GOTO(out, err = -ENOMEM);
 633         /* do counter init */
 634         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
 635                 __u32 type = llite_opcode_table[id].type;
 636                 void *ptr = NULL;
 637                 if (type & LPROCFS_TYPE_REGS)
 638                         ptr = "regs";
 639                 else if (type & LPROCFS_TYPE_BYTES)
 640                         ptr = "bytes";
 641                 else if (type & LPROCFS_TYPE_PAGES)
 642                         ptr = "pages";
 643                 lprocfs_counter_init(sbi->ll_stats,
 644                                      llite_opcode_table[id].opcode,
 645                                      (type & LPROCFS_CNTR_AVGMINMAX),
 646                                      llite_opcode_table[id].opname, ptr);
 647         }
 648         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
 649         if (err)
 650                 GOTO(out, err);
 651
 652         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
 653         if (err)
 654                 GOTO(out, err);
 655
 656         /* MDC info */
 657         obd = class_name2obd(mdc);
 658
 659         LASSERT(obd != NULL);
 660         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 661         LASSERT(obd->obd_type->typ_name != NULL);
 662
 663         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 664                  obd->obd_type->typ_name);
 665         lvars[0].read_fptr = lprocfs_rd_name;
 666         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 667         if (err)
 668                 GOTO(out, err);
 669
 670         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 671         lvars[0].read_fptr = lprocfs_rd_uuid;
 672         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 673         if (err)
 674                 GOTO(out, err);
 675
 676         /* OSC */
 677         obd = class_name2obd(osc);
 678
 679         LASSERT(obd != NULL);
 680         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 681         LASSERT(obd->obd_type->typ_name != NULL);
 682
 683         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 684                  obd->obd_type->typ_name);
 685         lvars[0].read_fptr = lprocfs_rd_name;
 686         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 687         if (err)
 688                 GOTO(out, err);
 689
 690         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 691         lvars[0].read_fptr = lprocfs_rd_uuid;
 692         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 693 out:
 694         if (err) {
 695                 lprocfs_remove(&sbi->ll_proc_root);
 696                 lprocfs_free_stats(&sbi->ll_stats);
 697         }
 698         RETURN(err);
 699 }
 700
 701 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
 702 {
 703         if (sbi->ll_proc_root) {
 704                 lprocfs_remove(&sbi->ll_proc_root);
 705                 lprocfs_free_stats(&sbi->ll_stats);
 706         }
 707 }
 708 #undef MAX_STRING_SIZE
 709
 710 #define seq_page_flag(seq, page, flag, has_flags) do {                  \
 711                 if (test_bit(PG_##flag, &(page)->flags)) {              \
 712                         if (!has_flags)                                 \
 713                                 has_flags = 1;                          \
 714                         else                                            \
 715                                 seq_putc(seq, '|');                     \
 716                         seq_puts(seq, #flag);                           \
 717                 }                                                       \
 718         } while(0);
 719
 720 static void *llite_dump_pgcache_seq_start(struct seq_file *seq, loff_t *pos)
 721 {
 722         struct ll_async_page *dummy_llap = seq->private;
 723
 724         if (dummy_llap->llap_magic == 2)
 725                 return NULL;
 726
 727         return (void *)1;
 728 }
 729
 730 static int llite_dump_pgcache_seq_show(struct seq_file *seq, void *v)
 731 {
 732         struct ll_async_page *llap, *dummy_llap = seq->private;
 733         struct ll_sb_info *sbi = dummy_llap->llap_cookie;
 734
 735         /* 2.4 doesn't seem to have SEQ_START_TOKEN, so we implement
 736          * it in our own state */
 737         if (dummy_llap->llap_magic == 0) {
 738                 seq_printf(seq, "gener |  llap  cookie  origin wq du wb | page "
 739                                 "inode index count [ page flags ]\n");
 740                 return 0;
 741         }
 742
 743         spin_lock(&sbi->ll_lock);
 744
 745         llap = llite_pglist_next_llap(sbi, &dummy_llap->llap_pglist_item);
 746         if (llap != NULL)  {
 747                 int has_flags = 0;
 748                 struct page *page = llap->llap_page;
 749
 750                 LASSERTF(llap->llap_origin < LLAP__ORIGIN_MAX, "%u\n",
 751                          llap->llap_origin);
 752
 753                 seq_printf(seq," %5lu | %p %p %s %s %s %s | %p %lu/%u(%p) "
 754                            "%lu %u [",
 755                            sbi->ll_pglist_gen,
 756                            llap, llap->llap_cookie,
 757                            llap_origins[llap->llap_origin],
 758                            llap->llap_write_queued ? "wq" : "- ",
 759                            llap->llap_defer_uptodate ? "du" : "- ",
 760                            PageWriteback(page) ? "wb" : "-",
 761                            page, page->mapping->host->i_ino,
 762                            page->mapping->host->i_generation,
 763                            page->mapping->host, page->index,
 764                            page_count(page));
 765                 seq_page_flag(seq, page, locked, has_flags);
 766                 seq_page_flag(seq, page, error, has_flags);
 767                 seq_page_flag(seq, page, referenced, has_flags);
 768                 seq_page_flag(seq, page, uptodate, has_flags);
 769                 seq_page_flag(seq, page, dirty, has_flags);
 770 #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,12))
 771                 seq_page_flag(seq, page, highmem, has_flags);
 772 #endif
 773                 seq_page_flag(seq, page, writeback, has_flags);
 774                 if (!has_flags)
 775                         seq_puts(seq, "-]\n");
 776                 else
 777                         seq_puts(seq, "]\n");
 778         }
 779
 780         spin_unlock(&sbi->ll_lock);
 781
 782         return 0;
 783 }
 784
 785 static void *llite_dump_pgcache_seq_next(struct seq_file *seq, void *v,
 786                                          loff_t *pos)
 787 {
 788         struct ll_async_page *llap, *dummy_llap = seq->private;
 789         struct ll_sb_info *sbi = dummy_llap->llap_cookie;
 790
 791         /* bail if we just displayed the banner */
 792         if (dummy_llap->llap_magic == 0) {
 793                 dummy_llap->llap_magic = 1;
 794                 return dummy_llap;
 795         }
 796
 797         /* we've just displayed the llap that is after us in the list.
 798          * we advance to a position beyond it, returning null if there
 799          * isn't another llap in the list beyond that new position. */
 800         spin_lock(&sbi->ll_lock);
 801         llap = llite_pglist_next_llap(sbi, &dummy_llap->llap_pglist_item);
 802         list_del_init(&dummy_llap->llap_pglist_item);
 803         if (llap) {
 804                 list_add(&dummy_llap->llap_pglist_item,&llap->llap_pglist_item);
 805                 llap =llite_pglist_next_llap(sbi,&dummy_llap->llap_pglist_item);
 806         }
 807         spin_unlock(&sbi->ll_lock);
 808
 809         ++*pos;
 810         if (llap == NULL) {
 811                 dummy_llap->llap_magic = 2;
 812                 return NULL;
 813         }
 814         return dummy_llap;
 815 }
 816
 817 static void null_stop(struct seq_file *seq, void *v)
 818 {
 819 }
 820
 821 struct seq_operations llite_dump_pgcache_seq_sops = {
 822         .start = llite_dump_pgcache_seq_start,
 823         .stop = null_stop,
 824         .next = llite_dump_pgcache_seq_next,
 825         .show = llite_dump_pgcache_seq_show,
 826 };
 827
 828 /* we're displaying llaps in a list_head list.  we don't want to hold a lock
 829  * while we walk the entire list, and we don't want to have to seek into
 830  * the right position in the list as an app advances with many syscalls.  we
 831  * allocate a dummy llap and hang it off file->private.  its position in
 832  * the list records where the app is currently displaying.  this way our
 833  * seq .start and .stop don't actually do anything.  .next returns null
 834  * when the dummy hits the end of the list which eventually leads to .release
 835  * where we tear down.  this kind of displaying is super-racey, so we put
 836  * a generation counter on the list so the output shows when the list
 837  * changes between reads.
 838  */
 839 static int llite_dump_pgcache_seq_open(struct inode *inode, struct file *file)
 840 {
 841         struct proc_dir_entry *dp = PDE(inode);
 842         struct ll_async_page *dummy_llap;
 843         struct seq_file *seq;
 844         struct ll_sb_info *sbi = dp->data;
 845         int rc = -ENOMEM;
 846
 847         LPROCFS_ENTRY_AND_CHECK(dp);
 848
 849         OBD_ALLOC_PTR_WAIT(dummy_llap);
 850         if (dummy_llap == NULL)
 851                 GOTO(out, rc);
 852         dummy_llap->llap_page = NULL;
 853         dummy_llap->llap_cookie = sbi;
 854         dummy_llap->llap_magic = 0;
 855
 856         rc = seq_open(file, &llite_dump_pgcache_seq_sops);
 857         if (rc) {
 858                 OBD_FREE(dummy_llap, sizeof(*dummy_llap));
 859                 GOTO(out, rc);
 860         }
 861         seq = file->private_data;
 862         seq->private = dummy_llap;
 863
 864         spin_lock(&sbi->ll_lock);
 865         list_add(&dummy_llap->llap_pglist_item, &sbi->ll_pglist);
 866         spin_unlock(&sbi->ll_lock);
 867
 868 out:
 869         if (rc)
 870                 LPROCFS_EXIT();
 871         return rc;
 872 }
 873
 874 static int llite_dump_pgcache_seq_release(struct inode *inode,
 875                                           struct file *file)
 876 {
 877         struct seq_file *seq = file->private_data;
 878         struct ll_async_page *dummy_llap = seq->private;
 879         struct ll_sb_info *sbi = dummy_llap->llap_cookie;
 880
 881         spin_lock(&sbi->ll_lock);
 882         if (!list_empty(&dummy_llap->llap_pglist_item))
 883                 list_del_init(&dummy_llap->llap_pglist_item);
 884         spin_unlock(&sbi->ll_lock);
 885         OBD_FREE(dummy_llap, sizeof(*dummy_llap));
 886
 887         return lprocfs_seq_release(inode, file);
 888 }
 889
 890 struct file_operations llite_dump_pgcache_fops = {
 891         .owner   = THIS_MODULE,
 892         .open    = llite_dump_pgcache_seq_open,
 893         .read    = seq_read,
 894         .release = llite_dump_pgcache_seq_release,
 895 };
 896
 897 static int ll_ra_stats_seq_show(struct seq_file *seq, void *v)
 898 {
 899         struct timeval now;
 900         struct ll_sb_info *sbi = seq->private;
 901         struct ll_ra_info *ra = &sbi->ll_ra_info;
 902         int i;
 903         static char *ra_stat_strings[] = {
 904                 [RA_STAT_HIT] = "hits",
 905                 [RA_STAT_MISS] = "misses",
 906                 [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 907                 [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 908                 [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
 909                 [RA_STAT_FAILED_MATCH] = "failed lock match",
 910                 [RA_STAT_DISCARDED] = "read but discarded",
 911                 [RA_STAT_ZERO_LEN] = "zero length file",
 912                 [RA_STAT_ZERO_WINDOW] = "zero size window",
 913                 [RA_STAT_EOF] = "read-ahead to EOF",
 914                 [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 915                 [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
 916         };
 917
 918         do_gettimeofday(&now);
 919
 920         spin_lock(&sbi->ll_lock);
 921
 922         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 923                    now.tv_sec, now.tv_usec);
 924         seq_printf(seq, "pending issued pages:           %lu\n",
 925                    ra->ra_cur_pages);
 926
 927         for(i = 0; i < _NR_RA_STAT; i++)
 928                 seq_printf(seq, "%-25s %lu\n", ra_stat_strings[i],
 929                            ra->ra_stats[i]);
 930
 931         spin_unlock(&sbi->ll_lock);
 932
 933         return 0;
 934 }
 935
 936 static ssize_t ll_ra_stats_seq_write(struct file *file, const char *buf,
 937                                        size_t len, loff_t *off)
 938 {
 939         struct seq_file *seq = file->private_data;
 940         struct ll_sb_info *sbi = seq->private;
 941         struct ll_ra_info *ra = &sbi->ll_ra_info;
 942
 943         spin_lock(&sbi->ll_lock);
 944         memset(ra->ra_stats, 0, sizeof(ra->ra_stats));
 945         spin_unlock(&sbi->ll_lock);
 946
 947         return len;
 948 }
 949
 950 LPROC_SEQ_FOPS(ll_ra_stats);
 951
 952 #define pct(a,b) (b ? a * 100 / b : 0)
 953
 954 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
 955                                    struct seq_file *seq, int which)
 956 {
 957         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 958         unsigned long start, end, r, w;
 959         char *unitp = "KMGTPEZY";
 960         int i, units = 10;
 961         struct per_process_info *pp_info = &io_extents->pp_extents[which];
 962
 963         read_cum = 0;
 964         write_cum = 0;
 965         start = 0;
 966
 967         for(i = 0; i < LL_HIST_MAX; i++) {
 968                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
 969                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
 970         }
 971
 972         for(i = 0; i < LL_HIST_MAX; i++) {
 973                 r = pp_info->pp_r_hist.oh_buckets[i];
 974                 w = pp_info->pp_w_hist.oh_buckets[i];
 975                 read_cum += r;
 976                 write_cum += w;
 977                 end = 1 << (i + LL_HIST_START - units);
 978                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
 979                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
 980                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
 981                            r, pct(r, read_tot), pct(read_cum, read_tot),
 982                            w, pct(w, write_tot), pct(write_cum, write_tot));
 983                 start = end;
 984                 if (start == 1<<10) {
 985                         start = 1;
 986                         units += 10;
 987                         unitp++;
 988                 }
 989                 if (read_cum == read_tot && write_cum == write_tot)
 990                         break;
 991         }
 992 }
 993
 994 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
 995 {
 996         struct timeval now;
 997         struct ll_sb_info *sbi = seq->private;
 998         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
 999         int k;
1000
1001         do_gettimeofday(&now);
1002
1003         if (!sbi->ll_rw_stats_on) {
1004                 seq_printf(seq, "Disabled\n"
1005                                 "Write anything in this file to activate\n");
1006                 return 0;
1007         }
1008         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1009                    now.tv_sec, now.tv_usec);
1010         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1011         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1012                    "extents", "calls", "%", "cum%",
1013                    "calls", "%", "cum%");
1014         spin_lock(&sbi->ll_pp_extent_lock);
1015         for(k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1016                 if(io_extents->pp_extents[k].pid != 0) {
1017                         seq_printf(seq, "\nPID: %d\n",
1018                                    io_extents->pp_extents[k].pid);
1019                         ll_display_extents_info(io_extents, seq, k);
1020                 }
1021         }
1022         spin_unlock(&sbi->ll_pp_extent_lock);
1023         return 0;
1024 }
1025
1026 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1027                                                 const char *buf, size_t len,
1028                                                 loff_t *off)
1029 {
1030         struct seq_file *seq = file->private_data;
1031         struct ll_sb_info *sbi = seq->private;
1032         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1033         int i;
1034
1035         sbi->ll_rw_stats_on = 1;
1036         spin_lock(&sbi->ll_pp_extent_lock);
1037         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1038                 io_extents->pp_extents[i].pid = 0;
1039                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1040                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1041         }
1042         spin_unlock(&sbi->ll_pp_extent_lock);
1043         return len;
1044 }
1045
1046 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1047
1048 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1049 {
1050         struct timeval now;
1051         struct ll_sb_info *sbi = seq->private;
1052         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1053
1054         do_gettimeofday(&now);
1055
1056         if (!sbi->ll_rw_stats_on) {
1057                 seq_printf(seq, "Disabled\n"
1058                                 "Write anything in this file to activate\n");
1059                 return 0;
1060         }
1061         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1062                    now.tv_sec, now.tv_usec);
1063
1064         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1065         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1066                    "extents", "calls", "%", "cum%",
1067                    "calls", "%", "cum%");
1068         spin_lock(&sbi->ll_lock);
1069         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1070         spin_unlock(&sbi->ll_lock);
1071
1072         return 0;
1073 }
1074
1075 static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf,
1076                                         size_t len, loff_t *off)
1077 {
1078         struct seq_file *seq = file->private_data;
1079         struct ll_sb_info *sbi = seq->private;
1080         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1081         int i;
1082
1083         sbi->ll_rw_stats_on = 1;
1084         spin_lock(&sbi->ll_pp_extent_lock);
1085         for(i = 0; i <= LL_PROCESS_HIST_MAX; i++)
1086         {
1087                 io_extents->pp_extents[i].pid = 0;
1088                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1089                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1090         }
1091         spin_unlock(&sbi->ll_pp_extent_lock);
1092
1093         return len;
1094 }
1095
1096 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1097
1098 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid, struct file
1099                                *file, size_t count, int rw)
1100 {
1101         int i, cur = -1;
1102         struct ll_rw_process_info *process;
1103         struct ll_rw_process_info *offset;
1104         int *off_count = &sbi->ll_rw_offset_entry_count;
1105         int *process_count = &sbi->ll_offset_process_count;
1106         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1107
1108         if(!sbi->ll_rw_stats_on)
1109                 return;
1110         process = sbi->ll_rw_process_info;
1111         offset = sbi->ll_rw_offset_info;
1112
1113         spin_lock(&sbi->ll_pp_extent_lock);
1114         /* Extent statistics */
1115         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1116                 if(io_extents->pp_extents[i].pid == pid) {
1117                         cur = i;
1118                         break;
1119                 }
1120         }
1121
1122         if (cur == -1) {
1123                 /* new process */
1124                 sbi->ll_extent_process_count =
1125                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1126                 cur = sbi->ll_extent_process_count;
1127                 io_extents->pp_extents[cur].pid = pid;
1128                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1129                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1130         }
1131
1132         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1133              (i < (LL_HIST_MAX - 1)); i++);
1134         if (rw == 0) {
1135                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1136                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1137         } else {
1138                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1139                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1140         }
1141         spin_unlock(&sbi->ll_pp_extent_lock);
1142
1143         spin_lock(&sbi->ll_process_lock);
1144         /* Offset statistics */
1145         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1146                 if (process[i].rw_pid == pid) {
1147                         if (process[i].rw_last_file != file) {
1148                                 process[i].rw_range_start = file->f_pos;
1149                                 process[i].rw_last_file_pos =
1150                                                         file->f_pos + count;
1151                                 process[i].rw_smallest_extent = count;
1152                                 process[i].rw_largest_extent = count;
1153                                 process[i].rw_offset = 0;
1154                                 process[i].rw_last_file = file;
1155                                 spin_unlock(&sbi->ll_process_lock);
1156                                 return;
1157                         }
1158                         if (process[i].rw_last_file_pos != file->f_pos) {
1159                                 *off_count =
1160                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1161                                 offset[*off_count].rw_op = process[i].rw_op;
1162                                 offset[*off_count].rw_pid = pid;
1163                                 offset[*off_count].rw_range_start =
1164                                         process[i].rw_range_start;
1165                                 offset[*off_count].rw_range_end =
1166                                         process[i].rw_last_file_pos;
1167                                 offset[*off_count].rw_smallest_extent =
1168                                         process[i].rw_smallest_extent;
1169                                 offset[*off_count].rw_largest_extent =
1170                                         process[i].rw_largest_extent;
1171                                 offset[*off_count].rw_offset =
1172                                         process[i].rw_offset;
1173                                 process[i].rw_op = rw;
1174                                 process[i].rw_range_start = file->f_pos;
1175                                 process[i].rw_smallest_extent = count;
1176                                 process[i].rw_largest_extent = count;
1177                                 process[i].rw_offset = file->f_pos -
1178                                         process[i].rw_last_file_pos;
1179                         }
1180                         if(process[i].rw_smallest_extent > count)
1181                                 process[i].rw_smallest_extent = count;
1182                         if(process[i].rw_largest_extent < count)
1183                                 process[i].rw_largest_extent = count;
1184                         process[i].rw_last_file_pos = file->f_pos + count;
1185                         spin_unlock(&sbi->ll_process_lock);
1186                         return;
1187                 }
1188         }
1189         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1190         process[*process_count].rw_pid = pid;
1191         process[*process_count].rw_op = rw;
1192         process[*process_count].rw_range_start = file->f_pos;
1193         process[*process_count].rw_last_file_pos = file->f_pos + count;
1194         process[*process_count].rw_smallest_extent = count;
1195         process[*process_count].rw_largest_extent = count;
1196         process[*process_count].rw_offset = 0;
1197         process[*process_count].rw_last_file = file;
1198         spin_unlock(&sbi->ll_process_lock);
1199 }
1200
1201 char lpszt[] = LPSZ;
1202
1203 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1204 {
1205         struct timeval now;
1206         struct ll_sb_info *sbi = seq->private;
1207         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1208         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1209         char format[50];
1210         int i;
1211
1212         do_gettimeofday(&now);
1213
1214         if (!sbi->ll_rw_stats_on) {
1215                 seq_printf(seq, "Disabled\n"
1216                                 "Write anything in this file to activate\n");
1217                 return 0;
1218         }
1219         spin_lock(&sbi->ll_process_lock);
1220
1221         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1222                    now.tv_sec, now.tv_usec);
1223         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1224                    "R/W", "PID", "RANGE START", "RANGE END",
1225                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1226         sprintf(format, "%s%s%s%s%s\n",
1227                 "%3c %10d %14Lu %14Lu %17", lpszt+1, " %17", lpszt+1, " %14Ld");
1228         /* We stored the discontiguous offsets here; print them first */
1229         for(i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1230                 if (offset[i].rw_pid != 0)
1231                         /* Is there a way to snip the '%' off of LPSZ? */
1232                         seq_printf(seq, format,
1233                                    offset[i].rw_op ? 'W' : 'R',
1234                                    offset[i].rw_pid,
1235                                    offset[i].rw_range_start,
1236                                    offset[i].rw_range_end,
1237                                    offset[i].rw_smallest_extent,
1238                                    offset[i].rw_largest_extent,
1239                                    offset[i].rw_offset);
1240         }
1241         /* Then print the current offsets for each process */
1242         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1243                 if (process[i].rw_pid != 0)
1244                         seq_printf(seq, format,
1245                                    process[i].rw_op ? 'W' : 'R',
1246                                    process[i].rw_pid,
1247                                    process[i].rw_range_start,
1248                                    process[i].rw_last_file_pos,
1249                                    process[i].rw_smallest_extent,
1250                                    process[i].rw_largest_extent,
1251                                    process[i].rw_offset);
1252         }
1253         spin_unlock(&sbi->ll_process_lock);
1254
1255         return 0;
1256 }
1257
1258 static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf,
1259                                        size_t len, loff_t *off)
1260 {
1261         struct seq_file *seq = file->private_data;
1262         struct ll_sb_info *sbi = seq->private;
1263         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1264         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1265
1266         sbi->ll_rw_stats_on = 1;
1267
1268         spin_lock(&sbi->ll_process_lock);
1269         sbi->ll_offset_process_count = 0;
1270         sbi->ll_rw_offset_entry_count = 0;
1271         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1272                LL_PROCESS_HIST_MAX);
1273         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1274                LL_OFFSET_HIST_MAX);
1275         spin_unlock(&sbi->ll_process_lock);
1276
1277         return len;
1278 }
1279
1280 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1281
1282 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
1283 {
1284     lvars->module_vars  = NULL;
1285     lvars->obd_vars     = lprocfs_llite_obd_vars;
1286 }
1287 #endif /* LPROCFS */