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 <linux/lustre_lite.h>
  26 #include <linux/lprocfs_status.h>
  27 #include <linux/seq_file.h>
  28 #include <linux/obd_support.h>
  29 #ifdef HAVE_MM_INLINE
  30 #include <linux/mm_inline.h>
  31 #endif
  32
  33 #include "llite_internal.h"
  34
  35 /* /proc/lustre/llite mount point registration */
  36 struct proc_dir_entry *proc_lustre_fs_root;
  37 struct file_operations llite_dump_pgcache_fops;
  38 struct file_operations ll_ra_stats_fops;
  39 struct file_operations llite_wait_times_fops;
  40
  41 #ifndef LPROCFS
  42 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
  43                                 struct super_block *sb, char *osc, char *mdc)
  44 {
  45         return 0;
  46 }
  47 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi){}
  48 #else
  49
  50 long long mnt_instance;
  51
  52 static int ll_rd_blksize(char *page, char **start, off_t off, int count,
  53                          int *eof, void *data)
  54 {
  55         struct super_block *sb = (struct super_block *)data;
  56         struct obd_statfs osfs;
  57         int rc;
  58
  59         LASSERT(sb != NULL);
  60         rc = ll_statfs_internal(sb, &osfs, jiffies - HZ);
  61         if (!rc) {
  62               *eof = 1;
  63               rc = snprintf(page, count, "%u\n", osfs.os_bsize);
  64         }
  65
  66         return rc;
  67 }
  68
  69 static int ll_rd_kbytestotal(char *page, char **start, off_t off, int count,
  70                              int *eof, void *data)
  71 {
  72         struct super_block *sb = (struct super_block *)data;
  73         struct obd_statfs osfs;
  74         int rc;
  75
  76         LASSERT(sb != NULL);
  77         rc = ll_statfs_internal(sb, &osfs, jiffies - HZ);
  78         if (!rc) {
  79                 __u32 blk_size = osfs.os_bsize >> 10;
  80                 __u64 result = osfs.os_blocks;
  81
  82                 while (blk_size >>= 1)
  83                         result <<= 1;
  84
  85                 *eof = 1;
  86                 rc = snprintf(page, count, LPU64"\n", result);
  87         }
  88         return rc;
  89
  90 }
  91
  92 static int ll_rd_kbytesfree(char *page, char **start, off_t off, int count,
  93                             int *eof, void *data)
  94 {
  95         struct super_block *sb = (struct super_block *)data;
  96         struct obd_statfs osfs;
  97         int rc;
  98
  99         LASSERT(sb != NULL);
 100         rc = ll_statfs_internal(sb, &osfs, jiffies - HZ);
 101         if (!rc) {
 102                 __u32 blk_size = osfs.os_bsize >> 10;
 103                 __u64 result = osfs.os_bfree;
 104
 105                 while (blk_size >>= 1)
 106                         result <<= 1;
 107
 108                 *eof = 1;
 109                 rc = snprintf(page, count, LPU64"\n", result);
 110         }
 111         return rc;
 112 }
 113
 114 static int ll_rd_kbytesavail(char *page, char **start, off_t off, int count,
 115                              int *eof, void *data)
 116 {
 117         struct super_block *sb = (struct super_block *)data;
 118         struct obd_statfs osfs;
 119         int rc;
 120
 121         LASSERT(sb != NULL);
 122         rc = ll_statfs_internal(sb, &osfs, jiffies - HZ);
 123         if (!rc) {
 124                 __u32 blk_size = osfs.os_bsize >> 10;
 125                 __u64 result = osfs.os_bavail;
 126
 127                 while (blk_size >>= 1)
 128                         result <<= 1;
 129
 130                 *eof = 1;
 131                 rc = snprintf(page, count, LPU64"\n", result);
 132         }
 133         return rc;
 134 }
 135
 136 static int ll_rd_filestotal(char *page, char **start, off_t off, int count,
 137                             int *eof, void *data)
 138 {
 139         struct super_block *sb = (struct super_block *)data;
 140         struct obd_statfs osfs;
 141         int rc;
 142
 143         LASSERT(sb != NULL);
 144         rc = ll_statfs_internal(sb, &osfs, jiffies - HZ);
 145         if (!rc) {
 146                  *eof = 1;
 147                  rc = snprintf(page, count, LPU64"\n", osfs.os_files);
 148         }
 149         return rc;
 150 }
 151
 152 static int ll_rd_filesfree(char *page, char **start, off_t off, int count,
 153                            int *eof, void *data)
 154 {
 155         struct super_block *sb = (struct super_block *)data;
 156         struct obd_statfs osfs;
 157         int rc;
 158
 159         LASSERT(sb != NULL);
 160         rc = ll_statfs_internal(sb, &osfs, jiffies - HZ);
 161         if (!rc) {
 162                  *eof = 1;
 163                  rc = snprintf(page, count, LPU64"\n", osfs.os_ffree);
 164         }
 165         return rc;
 166
 167 }
 168
 169 static int ll_rd_fstype(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", sb->s_type->name);
 177 }
 178
 179 static int ll_rd_sb_uuid(char *page, char **start, off_t off, int count,
 180                          int *eof, void *data)
 181 {
 182         struct super_block *sb = (struct super_block *)data;
 183
 184         LASSERT(sb != NULL);
 185         *eof = 1;
 186         return snprintf(page, count, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
 187 }
 188
 189 static int ll_rd_read_ahead(char *page, char **start, off_t off, int count,
 190                             int *eof, void *data)
 191 {
 192         struct super_block *sb = (struct super_block*)data;
 193         struct ll_sb_info *sbi = ll_s2sbi(sb);
 194         int val, rc;
 195         ENTRY;
 196
 197         *eof = 1;
 198         val = (sbi->ll_flags & LL_SBI_READAHEAD) ? 1 : 0;
 199         rc = snprintf(page, count, "%d\n", val);
 200         RETURN(rc);
 201 }
 202
 203 static int ll_wr_read_ahead(struct file *file, const char *buffer,
 204                             unsigned long count, void *data)
 205 {
 206         struct super_block *sb = (struct super_block*)data;
 207         struct ll_sb_info *sbi = ll_s2sbi(sb);
 208         int readahead;
 209         ENTRY;
 210
 211         if (sscanf(buffer, "%d", &readahead) != 1)
 212                 RETURN(-EINVAL);
 213
 214         if (readahead)
 215                 sbi->ll_flags |= LL_SBI_READAHEAD;
 216         else
 217                 sbi->ll_flags &= ~LL_SBI_READAHEAD;
 218
 219         RETURN(count);
 220 }
 221
 222 static int ll_wr_config_update(struct file *file, const char *buffer,
 223                                unsigned long count, void *data)
 224 {
 225         struct super_block *sb = (struct super_block*)data;
 226         struct ll_sb_info *sbi = ll_s2sbi(sb);
 227         ENTRY;
 228
 229         CWARN("Starting a LOV/OST update !\n");
 230         ll_process_config_update(sbi, 0);
 231         RETURN(count);
 232 }
 233
 234 static int ll_rd_max_read_ahead_mb(char *page, char **start, off_t off,
 235                                    int count, int *eof, void *data)
 236 {
 237         struct super_block *sb = data;
 238         struct ll_sb_info *sbi = ll_s2sbi(sb);
 239         unsigned val;
 240
 241         spin_lock(&sbi->ll_lock);
 242         val = (sbi->ll_ra_info.ra_max_pages << PAGE_CACHE_SHIFT) >> 20;
 243         spin_unlock(&sbi->ll_lock);
 244
 245         return snprintf(page, count, "%u\n", val);
 246 }
 247
 248 static int ll_wr_max_read_ahead_mb(struct file *file, const char *buffer,
 249                                    unsigned long count, void *data)
 250 {
 251         struct super_block *sb = data;
 252         struct ll_sb_info *sbi = ll_s2sbi(sb);
 253         int val, rc;
 254
 255         rc = lprocfs_write_helper(buffer, count, &val);
 256         if (rc)
 257                 return rc;
 258
 259         if (val < 0 || val > (num_physpages << PAGE_SHIFT) >> 20)
 260                 return -ERANGE;
 261
 262         spin_lock(&sbi->ll_lock);
 263         sbi->ll_ra_info.ra_max_pages = (val << 20) >> PAGE_CACHE_SHIFT;
 264         spin_unlock(&sbi->ll_lock);
 265
 266         return count;
 267 }
 268
 269 static int ll_rd_gns_upcall(char *page, char **start, off_t off,
 270                             int count, int *eof, void *data)
 271 {
 272         struct super_block *sb = (struct super_block *)data;
 273         struct ll_sb_info *sbi = ll_s2sbi(sb);
 274         int len;
 275
 276         down(&sbi->ll_gns_sem);
 277         len = snprintf(page, count, "%s\n", sbi->ll_gns_upcall);
 278         up(&sbi->ll_gns_sem);
 279
 280         return len;
 281 }
 282
 283 static int ll_wr_gns_upcall(struct file *file, const char *buffer,
 284                             unsigned long count, void *data)
 285 {
 286         struct super_block *sb = (struct super_block *)data;
 287         struct ll_sb_info *sbi = ll_s2sbi(sb);
 288
 289         down(&sbi->ll_gns_sem);
 290
 291         /*
 292          * upcall should not be the same as object name, check for possible
 293          * overflow.
 294          */
 295         if (count < sizeof(sbi->ll_gns_upcall) &&
 296             (strlen(sbi->ll_gns_oname) != count ||
 297              strncmp(sbi->ll_gns_oname, buffer, count)))
 298                 snprintf(sbi->ll_gns_upcall, count, "%s", buffer);
 299
 300         up(&sbi->ll_gns_sem);
 301         return count;
 302 }
 303
 304 static int ll_rd_gns_object_name(char *page, char **start, off_t off,
 305                                  int count, int *eof, void *data)
 306 {
 307         struct super_block *sb = (struct super_block *)data;
 308         struct ll_sb_info *sbi = ll_s2sbi(sb);
 309         int len;
 310
 311         down(&sbi->ll_gns_sem);
 312         len = snprintf(page, count, "%s\n", sbi->ll_gns_oname);
 313         up(&sbi->ll_gns_sem);
 314
 315         return len;
 316 }
 317
 318 static int ll_wr_gns_object_name(struct file *file, const char *buffer,
 319                                  unsigned long count, void *data)
 320 {
 321         struct super_block *sb = (struct super_block *)data;
 322         struct ll_sb_info *sbi = ll_s2sbi(sb);
 323
 324         /* checking for setting "." and ".." as object name */
 325         if (buffer[0] == '.') switch (count) {
 326                 case 2:
 327                         /* this is "." case with terminating zero */
 328                         return -EINVAL;
 329                 case 3:
 330                         /* this is ".." case with terminating zero */
 331                         if (buffer[1] == '.')
 332                                 return -EINVAL;
 333         }
 334
 335         down(&sbi->ll_gns_sem);
 336
 337         /*
 338          * upcall should not be the same as object name, check for possible
 339          * overflow.
 340          */
 341         if (count < sizeof(sbi->ll_gns_oname) &&
 342             (strlen(sbi->ll_gns_upcall) != count ||
 343              strncmp(sbi->ll_gns_upcall, buffer, count)))
 344                 snprintf(sbi->ll_gns_oname, count, "%s", buffer);
 345
 346         up(&sbi->ll_gns_sem);
 347         return count;
 348 }
 349
 350 static int ll_rd_gns_timeout(char *page, char **start, off_t off,
 351                              int count, int *eof, void *data)
 352 {
 353         struct super_block *sb = (struct super_block *)data;
 354         struct ll_sb_info *sbi = ll_s2sbi(sb);
 355         int len;
 356
 357         down(&sbi->ll_gns_sem);
 358         len = snprintf(page, count, "%lu\n",
 359                        (unsigned long)sbi->ll_gns_timeout);
 360         up(&sbi->ll_gns_sem);
 361
 362         return len;
 363 }
 364
 365 static int ll_wr_gns_timeout(struct file *file, const char *buffer,
 366                              unsigned long count, void *data)
 367 {
 368         struct super_block *sb = (struct super_block *)data;
 369         struct ll_sb_info *sbi = ll_s2sbi(sb);
 370         int val, rc;
 371
 372         rc = lprocfs_write_helper(buffer, count, &val);
 373         if (rc)
 374                 return rc;
 375
 376         down(&sbi->ll_gns_sem);
 377         if (val > sbi->ll_gns_tick)
 378                 sbi->ll_gns_timeout = val;
 379         up(&sbi->ll_gns_sem);
 380
 381         return count;
 382 }
 383
 384 static int ll_rd_gns_tick(char *page, char **start, off_t off,
 385                           int count, int *eof, void *data)
 386 {
 387         struct super_block *sb = (struct super_block *)data;
 388         struct ll_sb_info *sbi = ll_s2sbi(sb);
 389         int len;
 390
 391         down(&sbi->ll_gns_sem);
 392         len = snprintf(page, count, "%lu\n",
 393                        (unsigned long)sbi->ll_gns_tick);
 394         up(&sbi->ll_gns_sem);
 395
 396         return len;
 397 }
 398
 399 static int ll_wr_gns_tick(struct file *file, const char *buffer,
 400                           unsigned long count, void *data)
 401 {
 402         struct super_block *sb = (struct super_block *)data;
 403         struct ll_sb_info *sbi = ll_s2sbi(sb);
 404         int val, rc;
 405
 406         rc = lprocfs_write_helper(buffer, count, &val);
 407         if (rc)
 408                 return rc;
 409
 410         down(&sbi->ll_gns_sem);
 411         if (val < sbi->ll_gns_timeout)
 412                 sbi->ll_gns_tick = val;
 413         up(&sbi->ll_gns_sem);
 414
 415         return count;
 416 }
 417
 418 static int ll_rd_gns_enabled(char *page, char **start, off_t off,
 419                              int count, int *eof, void *data)
 420 {
 421         struct super_block *sb = (struct super_block *)data;
 422         struct ll_sb_info *sbi = ll_s2sbi(sb);
 423
 424         return snprintf(page, count, "%d\n",
 425                         atomic_read(&sbi->ll_gns_enabled));
 426 }
 427
 428 static int ll_wr_gns_enabled(struct file *file, const char *buffer,
 429                              unsigned long count, void *data)
 430 {
 431         struct super_block *sb = (struct super_block *)data;
 432         struct ll_sb_info *sbi = ll_s2sbi(sb);
 433         int val, rc;
 434
 435         rc = lprocfs_write_helper(buffer, count, &val);
 436         if (rc)
 437                 return rc;
 438
 439         atomic_set(&sbi->ll_gns_enabled, (val != 0 ? 1 : 0));
 440         return count;
 441 }
 442
 443 static struct lprocfs_vars lprocfs_obd_vars[] = {
 444         { "uuid",         ll_rd_sb_uuid,          0, 0 },
 445         //{ "mntpt_path",   ll_rd_path,             0, 0 },
 446         { "fstype",       ll_rd_fstype,           0, 0 },
 447         { "blocksize",    ll_rd_blksize,          0, 0 },
 448         { "kbytestotal",  ll_rd_kbytestotal,      0, 0 },
 449         { "kbytesfree",   ll_rd_kbytesfree,       0, 0 },
 450         { "kbytesavail",  ll_rd_kbytesavail,      0, 0 },
 451         { "filestotal",   ll_rd_filestotal,       0, 0 },
 452         { "filesfree",    ll_rd_filesfree,        0, 0 },
 453         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
 454         { "read_ahead",   ll_rd_read_ahead, ll_wr_read_ahead, 0 },
 455         { "config_update", 0, ll_wr_config_update, 0 },
 456         { "max_read_ahead_mb", ll_rd_max_read_ahead_mb,
 457                                ll_wr_max_read_ahead_mb, 0 },
 458
 459         { "gns_upcall", ll_rd_gns_upcall,
 460           ll_wr_gns_upcall, 0 },
 461
 462         { "gns_timeout", ll_rd_gns_timeout,
 463           ll_wr_gns_timeout, 0 },
 464
 465         { "gns_tick", ll_rd_gns_tick,
 466           ll_wr_gns_tick, 0 },
 467
 468         { "gns_enabled", ll_rd_gns_enabled,
 469           ll_wr_gns_enabled, 0 },
 470
 471         { "gns_object_name", ll_rd_gns_object_name,
 472           ll_wr_gns_object_name, 0 },
 473
 474         { 0 }
 475 };
 476
 477 #define MAX_STRING_SIZE 128
 478
 479 struct llite_file_opcode {
 480         __u32       opcode;
 481         __u32       type;
 482         const char *opname;
 483 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 484         /* file operation */
 485         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 486         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 487         { LPROC_LL_WB_WRITEPAGE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 488                                    "writeback_from_writepage" },
 489         { LPROC_LL_WB_PRESSURE,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 490                                    "writeback_from_pressure" },
 491         { LPROC_LL_WB_OK,          LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 492                                    "writeback_ok_pages" },
 493         { LPROC_LL_WB_FAIL,        LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 494                                    "writeback_failed_pages" },
 495         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 496                                    "read_bytes" },
 497         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 498                                    "write_bytes" },
 499         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 500                                    "brw_read" },
 501         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 502                                    "brw_write" },
 503
 504         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
 505         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 506         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
 507         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
 508         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
 509         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
 510         /* inode operation */
 511         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
 512         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "punch" },
 513 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
 514         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
 515 #else
 516         { LPROC_LL_REVALIDATE,     LPROCFS_TYPE_REGS, "getattr" },
 517 #endif
 518         /* special inode operation */
 519         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
 520         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 521         { LPROC_LL_DIRECT_READ,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 522                                    "direct_read" },
 523         { LPROC_LL_DIRECT_WRITE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 524                                    "direct_write" },
 525         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 526         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 527 };
 528
 529 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 530                                 struct super_block *sb, char *osc, char *mdc)
 531 {
 532         struct lprocfs_vars lvars[2];
 533         struct ll_sb_info *sbi = ll_s2sbi(sb);
 534         struct obd_device *obd;
 535         char name[MAX_STRING_SIZE + 1];
 536         int err, id;
 537         struct lprocfs_stats *svc_stats = NULL;
 538         struct proc_dir_entry *mdc_symlink, *osc_symlink;
 539         struct proc_dir_entry *entry;
 540         ENTRY;
 541
 542         memset(lvars, 0, sizeof(lvars));
 543
 544         name[MAX_STRING_SIZE] = '\0';
 545         lvars[0].name = name;
 546
 547         LASSERT(sbi != NULL);
 548         LASSERT(mdc != NULL);
 549         LASSERT(osc != NULL);
 550
 551         /* Mount info */
 552         snprintf(name, MAX_STRING_SIZE, "fs%llu", mnt_instance);
 553
 554         mnt_instance++;
 555         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 556         if (IS_ERR(sbi->ll_proc_root)) {
 557                 err = PTR_ERR(sbi->ll_proc_root);
 558                 sbi->ll_proc_root = NULL;
 559                 RETURN(err);
 560         }
 561
 562         entry = create_proc_entry("dump_page_cache", 0444, sbi->ll_proc_root);
 563         if (entry == NULL)
 564                 GOTO(out, err = -ENOMEM);
 565         entry->proc_fops = &llite_dump_pgcache_fops;
 566         entry->data = sbi;
 567
 568         entry = create_proc_entry("wait_times", 0444, sbi->ll_proc_root);
 569         if (entry == NULL)
 570                 GOTO(out, err = -ENOMEM);
 571         entry->proc_fops = &llite_wait_times_fops;
 572         entry->data = sbi;
 573
 574         entry = create_proc_entry("read_ahead_stats", 0444, sbi->ll_proc_root);
 575         if (entry == NULL)
 576                 GOTO(out, err = -ENOMEM);
 577         entry->proc_fops = &ll_ra_stats_fops;
 578         entry->data = sbi;
 579
 580         svc_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES);
 581         if (svc_stats == NULL) {
 582                 err = -ENOMEM;
 583                 goto out;
 584         }
 585         /* do counter init */
 586         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
 587                 __u32 type = llite_opcode_table[id].type;
 588                 void *ptr = NULL;
 589                 if (type & LPROCFS_TYPE_REGS)
 590                         ptr = "regs";
 591                 else {
 592                         if (type & LPROCFS_TYPE_BYTES)
 593                                 ptr = "bytes";
 594                         else {
 595                                 if (type & LPROCFS_TYPE_PAGES)
 596                                         ptr = "pages";
 597                         }
 598                 }
 599                 lprocfs_counter_init(svc_stats, llite_opcode_table[id].opcode,
 600                                      (type & LPROCFS_CNTR_AVGMINMAX),
 601                                      llite_opcode_table[id].opname, ptr);
 602         }
 603         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", svc_stats);
 604         if (err)
 605                 goto out;
 606         else
 607                 sbi->ll_stats = svc_stats;
 608         /* need place to keep svc_stats */
 609
 610         /* Static configuration info */
 611         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_obd_vars, sb);
 612         if (err)
 613                 goto out;
 614
 615         /* MDC info */
 616         obd = class_name2obd(mdc);
 617
 618         LASSERT(obd != NULL);
 619         LASSERT(obd->obd_type != NULL);
 620         LASSERT(obd->obd_type->typ_name != NULL);
 621
 622         snprintf(name, MAX_STRING_SIZE, "../../%s/%s",
 623                  obd->obd_type->typ_name, obd->obd_name);
 624         mdc_symlink = proc_symlink(obd->obd_type->typ_name, sbi->ll_proc_root,
 625                                    name);
 626         if (mdc_symlink == NULL) {
 627                 err = -ENOMEM;
 628                 goto out;
 629         }
 630
 631         /* OSC */
 632         obd = class_name2obd(osc);
 633
 634         LASSERT(obd != NULL);
 635         LASSERT(obd->obd_type != NULL);
 636         LASSERT(obd->obd_type->typ_name != NULL);
 637
 638        snprintf(name, MAX_STRING_SIZE, "../../%s/%s",
 639                 obd->obd_type->typ_name, obd->obd_name);
 640        osc_symlink = proc_symlink(obd->obd_type->typ_name, sbi->ll_proc_root,
 641                                   name);
 642        if (osc_symlink == NULL)
 643                err = -ENOMEM;
 644
 645
 646 out:
 647         if (err) {
 648                 if (svc_stats)
 649                         lprocfs_free_stats(svc_stats);
 650                 if (sbi->ll_proc_root)
 651                         lprocfs_remove(sbi->ll_proc_root);
 652         }
 653         RETURN(err);
 654 }
 655
 656 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
 657 {
 658         if (sbi->ll_proc_root) {
 659                 struct proc_dir_entry *file_stats =
 660                         lprocfs_srch(sbi->ll_proc_root, "stats");
 661
 662                 if (file_stats) {
 663                         lprocfs_free_stats(sbi->ll_stats);
 664                         lprocfs_remove(file_stats);
 665                 }
 666         }
 667 }
 668 #undef MAX_STRING_SIZE
 669
 670 static struct ll_async_page *llite_pglist_next_llap(struct ll_sb_info *sbi,
 671                                                     struct list_head *list)
 672 {
 673         struct ll_async_page *llap;
 674         struct list_head *pos;
 675
 676         list_for_each(pos, list) {
 677                 if (pos == &sbi->ll_pglist)
 678                         return NULL;
 679                 llap = list_entry(pos, struct ll_async_page, llap_proc_item);
 680                 if (llap->llap_page == NULL)
 681                         continue;
 682                 return llap;
 683         }
 684         LBUG();
 685         return NULL;
 686 }
 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 int llite_dump_pgcache_seq_show(struct seq_file *seq, void *v)
 699 {
 700         struct ll_async_page *llap, *dummy_llap = seq->private;
 701         struct ll_sb_info *sbi = dummy_llap->llap_cookie;
 702
 703         /* 2.4 doesn't seem to have SEQ_START_TOKEN, so we implement
 704          * it in our own state */
 705         if (dummy_llap->llap_magic == 0) {
 706                 seq_printf(seq, "generation | llap cookie origin | page ");
 707                 seq_printf(seq, "inode index count [ page flags ]\n");
 708                 return 0;
 709         }
 710
 711         spin_lock(&sbi->ll_lock);
 712
 713         llap = llite_pglist_next_llap(sbi, &dummy_llap->llap_proc_item);
 714         if (llap != NULL)  {
 715                 int has_flags = 0;
 716                 struct page *page = llap->llap_page;
 717                 static char *origins[] = {
 718                         [LLAP_ORIGIN_UNKNOWN] = "--",
 719                         [LLAP_ORIGIN_READPAGE] = "rp",
 720                         [LLAP_ORIGIN_READAHEAD] = "ra",
 721                         [LLAP_ORIGIN_COMMIT_WRITE] = "cw",
 722                         [LLAP_ORIGIN_WRITEPAGE] = "wp",
 723                 };
 724
 725                 LASSERTF(llap->llap_origin < LLAP__ORIGIN_MAX, "%u\n",
 726                          llap->llap_origin);
 727
 728                 seq_printf(seq, "%lu | %p %p %s | %p %p %lu %u [",
 729                                 sbi->ll_pglist_gen,
 730                                 llap, llap->llap_cookie,
 731                                 origins[llap->llap_origin],
 732                                 page, page->mapping->host, page->index,
 733                                 page_count(page));
 734                 seq_page_flag(seq, page, locked, has_flags);
 735                 seq_page_flag(seq, page, error, has_flags);
 736                 seq_page_flag(seq, page, referenced, has_flags);
 737                 seq_page_flag(seq, page, uptodate, has_flags);
 738                 seq_page_flag(seq, page, dirty, has_flags);
 739                 seq_page_flag(seq, page, highmem, has_flags);
 740                 if (!has_flags)
 741                         seq_puts(seq, "-]\n");
 742                 else
 743                         seq_puts(seq, "]\n");
 744         }
 745
 746         spin_unlock(&sbi->ll_lock);
 747
 748         return 0;
 749 }
 750
 751 static void *llite_dump_pgcache_seq_start(struct seq_file *seq, loff_t *pos)
 752 {
 753         struct ll_async_page *llap = seq->private;
 754
 755         if (llap->llap_magic == 2)
 756                 return NULL;
 757
 758         return (void *)1;
 759 }
 760
 761 static void *llite_dump_pgcache_seq_next(struct seq_file *seq, void *v,
 762                                          loff_t *pos)
 763 {
 764         struct ll_async_page *llap, *dummy_llap = seq->private;
 765         struct ll_sb_info *sbi = dummy_llap->llap_cookie;
 766
 767         /* bail if we just displayed the banner */
 768         if (dummy_llap->llap_magic == 0) {
 769                 dummy_llap->llap_magic = 1;
 770                 return dummy_llap;
 771         }
 772
 773         /* we've just displayed the llap that is after us in the list.
 774          * we advance to a position beyond it, returning null if there
 775          * isn't another llap in the list beyond that new position. */
 776         spin_lock(&sbi->ll_lock);
 777         llap = llite_pglist_next_llap(sbi, &dummy_llap->llap_proc_item);
 778         list_del_init(&dummy_llap->llap_proc_item);
 779         if (llap) {
 780                 list_add(&dummy_llap->llap_proc_item, &llap->llap_proc_item);
 781                 llap = llite_pglist_next_llap(sbi, &dummy_llap->llap_proc_item);
 782         }
 783         spin_unlock(&sbi->ll_lock);
 784
 785         ++*pos;
 786         if (llap == NULL) {
 787                 dummy_llap->llap_magic = 2;
 788                 return NULL;
 789         }
 790         return dummy_llap;
 791 }
 792
 793 static void llite_dump_pgcache_seq_stop(struct seq_file *seq, void *v)
 794 {
 795 }
 796
 797 struct seq_operations llite_dump_pgcache_seq_sops = {
 798         .start = llite_dump_pgcache_seq_start,
 799         .stop = llite_dump_pgcache_seq_stop,
 800         .next = llite_dump_pgcache_seq_next,
 801         .show = llite_dump_pgcache_seq_show,
 802 };
 803
 804 /* we're displaying llaps in a list_head list.  we don't want to hold a lock
 805  * while we walk the entire list, and we don't want to have to seek into
 806  * the right position in the list as an app advances with many syscalls.  we
 807  * allocate a dummy llap and hang it off file->private.  its position in
 808  * the list records where the app is currently displaying.  this way our
 809  * seq .start and .stop don't actually do anything.  .next returns null
 810  * when the dummy hits the end of the list which eventually leads to .release
 811  * where we tear down.  this kind of displaying is super-racey, so we put
 812  * a generation counter on the list so the output shows when the list
 813  * changes between reads.
 814  */
 815 static int llite_dump_pgcache_seq_open(struct inode *inode, struct file *file)
 816 {
 817         struct proc_dir_entry *dp = PDE(inode);
 818         struct ll_async_page *llap;
 819         struct seq_file *seq;
 820         struct ll_sb_info *sbi = dp->data;
 821         int rc;
 822
 823         OBD_ALLOC_GFP(llap, sizeof(*llap), GFP_KERNEL);
 824         if (llap == NULL)
 825                 return -ENOMEM;
 826         llap->llap_page = NULL;
 827         llap->llap_cookie = sbi;
 828         llap->llap_magic = 0;
 829
 830         rc = seq_open(file, &llite_dump_pgcache_seq_sops);
 831         if (rc) {
 832                 OBD_FREE(llap, sizeof(*llap));
 833                 return rc;
 834         }
 835         seq = file->private_data;
 836         seq->private = llap;
 837
 838         spin_lock(&sbi->ll_lock);
 839         list_add(&llap->llap_proc_item, &sbi->ll_pglist);
 840         spin_unlock(&sbi->ll_lock);
 841
 842         return 0;
 843 }
 844
 845 static int llite_dump_pgcache_seq_release(struct inode *inode,
 846                                           struct file *file)
 847 {
 848         struct seq_file *seq = file->private_data;
 849         struct ll_async_page *llap = seq->private;
 850         struct ll_sb_info *sbi = llap->llap_cookie;
 851
 852         spin_lock(&sbi->ll_lock);
 853         if (!list_empty(&llap->llap_proc_item))
 854                 list_del_init(&llap->llap_proc_item);
 855         spin_unlock(&sbi->ll_lock);
 856         OBD_FREE(llap, sizeof(*llap));
 857
 858         return seq_release(inode, file);
 859 }
 860
 861 struct file_operations llite_dump_pgcache_fops = {
 862         .owner   = THIS_MODULE,
 863         .open    = llite_dump_pgcache_seq_open,
 864         .read    = seq_read,
 865         .release = llite_dump_pgcache_seq_release,
 866 };
 867 static int ll_ra_stats_seq_show(struct seq_file *seq, void *v)
 868 {
 869         struct timeval now;
 870         struct ll_sb_info *sbi = seq->private;
 871         struct ll_ra_info *ra = &sbi->ll_ra_info;
 872         int i;
 873         static char *ra_stat_strings[] = {
 874                 [RA_STAT_HIT] = "hits",
 875                 [RA_STAT_MISS] = "misses",
 876                 [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 877                 [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 878                 [RA_STAT_FAILED_MATCH] = "failed lock match",
 879                 [RA_STAT_DISCARDED] = "read but discarded",
 880                 [RA_STAT_ZERO_LEN] = "zero length file",
 881                 [RA_STAT_ZERO_WINDOW] = "zero size window",
 882                 [RA_STAT_EOF] = "read-ahead to EOF",
 883                 [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 884         };
 885
 886         do_gettimeofday(&now);
 887
 888         spin_lock(&sbi->ll_lock);
 889
 890         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 891                    now.tv_sec, now.tv_usec);
 892         seq_printf(seq, "pending issued pages:           %lu\n",
 893                    ra->ra_cur_pages);
 894
 895         for(i = 0; i < _NR_RA_STAT; i++)
 896                 seq_printf(seq, "%-25s %lu\n", ra_stat_strings[i],
 897                            ra->ra_stats[i]);
 898
 899         spin_unlock(&sbi->ll_lock);
 900
 901         return 0;
 902 }
 903
 904 static void *ll_ra_stats_seq_start(struct seq_file *p, loff_t *pos)
 905 {
 906         if (*pos == 0)
 907                 return (void *)1;
 908         return NULL;
 909 }
 910 static void *ll_ra_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
 911 {
 912         ++*pos;
 913         return NULL;
 914 }
 915 static void ll_ra_stats_seq_stop(struct seq_file *p, void *v)
 916 {
 917 }
 918 struct seq_operations ll_ra_stats_seq_sops = {
 919         .start = ll_ra_stats_seq_start,
 920         .stop = ll_ra_stats_seq_stop,
 921         .next = ll_ra_stats_seq_next,
 922         .show = ll_ra_stats_seq_show,
 923 };
 924
 925 static int ll_ra_stats_seq_open(struct inode *inode, struct file *file)
 926 {
 927         struct proc_dir_entry *dp = PDE(inode);
 928         struct seq_file *seq;
 929         int rc;
 930
 931         rc = seq_open(file, &ll_ra_stats_seq_sops);
 932         if (rc)
 933                 return rc;
 934         seq = file->private_data;
 935         seq->private = dp->data;
 936         return 0;
 937 }
 938
 939 static ssize_t ll_ra_stats_seq_write(struct file *file, const char *buf,
 940                                        size_t len, loff_t *off)
 941 {
 942         struct seq_file *seq = file->private_data;
 943         struct ll_sb_info *sbi = seq->private;
 944         struct ll_ra_info *ra = &sbi->ll_ra_info;
 945
 946         spin_lock(&sbi->ll_lock);
 947         memset(ra->ra_stats, 0, sizeof(ra->ra_stats));
 948         spin_unlock(&sbi->ll_lock);
 949
 950         return len;
 951 }
 952
 953 struct file_operations ll_ra_stats_fops = {
 954         .owner   = THIS_MODULE,
 955         .open    = ll_ra_stats_seq_open,
 956         .read    = seq_read,
 957         .write   = ll_ra_stats_seq_write,
 958         .llseek  = seq_lseek,
 959         .release = seq_release,
 960 };
 961
 962 #define PRINTF_STIME(stime) (unsigned long)(stime)->st_num,     \
 963         lprocfs_stime_avg_ms(stime), lprocfs_stime_avg_us(stime)
 964
 965 static int llite_wait_times_seq_show(struct seq_file *seq, void *v)
 966 {
 967         struct ll_sb_info *sbi = seq->private;
 968         struct timeval now;
 969
 970         do_gettimeofday(&now);
 971
 972         spin_lock(&sbi->ll_lock);
 973
 974         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n\n",
 975                    now.tv_sec, now.tv_usec);
 976
 977         seq_printf(seq, "lock wait times: (num, average ms)\n");
 978         seq_printf(seq, "\tread\t%lu\t%lu.%04lu\n",
 979                         PRINTF_STIME(&sbi->ll_read_stime));
 980         seq_printf(seq, "\twrite\t%lu\t%lu.%04lu\n",
 981                         PRINTF_STIME(&sbi->ll_write_stime));
 982         seq_printf(seq, "\tgroup\t%lu\t%lu.%04lu\n",
 983                         PRINTF_STIME(&sbi->ll_grouplock_stime));
 984         seq_printf(seq, "\tseek\t%lu\t%lu.%04lu\n",
 985                         PRINTF_STIME(&sbi->ll_seek_stime));
 986         seq_printf(seq, "\tsetattr\t%lu\t%lu.%04lu\n\n",
 987                         PRINTF_STIME(&sbi->ll_setattr_stime));
 988
 989         seq_printf(seq, "io path wait times: (num, average ms)\n");
 990         seq_printf(seq, "\tll_brw\t%lu\t%lu.%04lu\n",
 991                         PRINTF_STIME(&sbi->ll_brw_stime));
 992 #if 0
 993         seq_printf(seq, "\tdone\t%lu\t%lu.%04lu\n",
 994                         PRINTF_STIME(&sbi->ll_done_stime));
 995 #endif
 996
 997         spin_unlock(&sbi->ll_lock);
 998
 999         return 0;
1000 }
1001 #undef pct
1002
1003 static void *llite_wait_times_seq_start(struct seq_file *p, loff_t *pos)
1004 {
1005         if (*pos == 0)
1006                 return (void *)1;
1007         return NULL;
1008 }
1009 static void *llite_wait_times_seq_next(struct seq_file *p, void *v, loff_t *pos)
1010 {
1011         ++*pos;
1012         return NULL;
1013 }
1014 static void llite_wait_times_seq_stop(struct seq_file *p, void *v)
1015 {
1016 }
1017 struct seq_operations llite_wait_times_seq_sops = {
1018         .start = llite_wait_times_seq_start,
1019         .stop = llite_wait_times_seq_stop,
1020         .next = llite_wait_times_seq_next,
1021         .show = llite_wait_times_seq_show,
1022 };
1023
1024 static int llite_wait_times_seq_open(struct inode *inode, struct file *file)
1025 {
1026         struct proc_dir_entry *dp = PDE(inode);
1027         struct seq_file *seq;
1028         int rc;
1029
1030         rc = seq_open(file, &llite_wait_times_seq_sops);
1031         if (rc)
1032                 return rc;
1033         seq = file->private_data;
1034         seq->private = dp->data;
1035         return 0;
1036 }
1037
1038 static ssize_t llite_wait_times_seq_write(struct file *file, const char *buf,
1039                                        size_t len, loff_t *off)
1040 {
1041         struct seq_file *seq = file->private_data;
1042         struct ll_sb_info *sbi = seq->private;
1043
1044         spin_lock(&sbi->ll_lock);
1045         memset(&sbi->ll_read_stime, 0, sizeof(sbi->ll_read_stime));
1046         memset(&sbi->ll_write_stime, 0, sizeof(sbi->ll_write_stime));
1047         memset(&sbi->ll_grouplock_stime, 0, sizeof(sbi->ll_grouplock_stime));
1048         memset(&sbi->ll_seek_stime, 0, sizeof(sbi->ll_seek_stime));
1049         memset(&sbi->ll_setattr_stime, 0, sizeof(sbi->ll_setattr_stime));
1050         memset(&sbi->ll_brw_stime, 0, sizeof(sbi->ll_brw_stime));
1051 //        memset(&sbi->ll_done_stime, 0, sizeof(sbi->ll_done_stime));
1052         spin_unlock(&sbi->ll_lock);
1053
1054         return len;
1055 }
1056
1057 struct file_operations llite_wait_times_fops = {
1058         .owner   = THIS_MODULE,
1059         .open    = llite_wait_times_seq_open,
1060         .read    = seq_read,
1061         .write   = llite_wait_times_seq_write,
1062         .llseek  = seq_lseek,
1063         .release = seq_release,
1064 };
1065
1066 #endif /* LPROCFS */