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         RETURN(ll_process_config_update(sbi, 0));
 231 }
 232
 233 static int ll_rd_max_read_ahead_mb(char *page, char **start, off_t off,
 234                                    int count, int *eof, void *data)
 235 {
 236         struct super_block *sb = data;
 237         struct ll_sb_info *sbi = ll_s2sbi(sb);
 238         unsigned val;
 239
 240         spin_lock(&sbi->ll_lock);
 241         val = (sbi->ll_ra_info.ra_max_pages << PAGE_CACHE_SHIFT) >> 20;
 242         spin_unlock(&sbi->ll_lock);
 243
 244         return snprintf(page, count, "%u\n", val);
 245 }
 246
 247 static int ll_wr_max_read_ahead_mb(struct file *file, const char *buffer,
 248                                    unsigned long count, void *data)
 249 {
 250         struct super_block *sb = data;
 251         struct ll_sb_info *sbi = ll_s2sbi(sb);
 252         int val, rc;
 253
 254         rc = lprocfs_write_helper(buffer, count, &val);
 255         if (rc)
 256                 return rc;
 257
 258         if (val < 0 || val > (num_physpages << PAGE_SHIFT) >> 20)
 259                 return -ERANGE;
 260
 261         spin_lock(&sbi->ll_lock);
 262         sbi->ll_ra_info.ra_max_pages = (val << 20) >> PAGE_CACHE_SHIFT;
 263         spin_unlock(&sbi->ll_lock);
 264
 265         return count;
 266 }
 267
 268 static int ll_rd_gns_upcall(char *page, char **start, off_t off,
 269                             int count, int *eof, void *data)
 270 {
 271         struct super_block *sb = (struct super_block *)data;
 272         struct ll_sb_info *sbi = ll_s2sbi(sb);
 273         int len;
 274
 275         down(&sbi->ll_gns_sem);
 276         len = snprintf(page, count, "%s\n", sbi->ll_gns_upcall);
 277         up(&sbi->ll_gns_sem);
 278
 279         return len;
 280 }
 281
 282 static int ll_wr_gns_upcall(struct file *file, const char *buffer,
 283                             unsigned long count, void *data)
 284 {
 285         struct super_block *sb = (struct super_block *)data;
 286         struct ll_sb_info *sbi = ll_s2sbi(sb);
 287
 288         down(&sbi->ll_gns_sem);
 289
 290         /*
 291          * upcall should not be the same as object name, check for possible
 292          * overflow.
 293          */
 294         if (count < sizeof(sbi->ll_gns_upcall) &&
 295             (strlen(sbi->ll_gns_oname) != count ||
 296              strncmp(sbi->ll_gns_oname, buffer, count)))
 297                 snprintf(sbi->ll_gns_upcall, count, "%s", buffer);
 298
 299         up(&sbi->ll_gns_sem);
 300         return count;
 301 }
 302
 303 static int ll_rd_gns_object_name(char *page, char **start, off_t off,
 304                                  int count, int *eof, void *data)
 305 {
 306         struct super_block *sb = (struct super_block *)data;
 307         struct ll_sb_info *sbi = ll_s2sbi(sb);
 308         int len;
 309
 310         down(&sbi->ll_gns_sem);
 311         len = snprintf(page, count, "%s\n", sbi->ll_gns_oname);
 312         up(&sbi->ll_gns_sem);
 313
 314         return len;
 315 }
 316
 317 static int ll_wr_gns_object_name(struct file *file, const char *buffer,
 318                                  unsigned long count, void *data)
 319 {
 320         struct super_block *sb = (struct super_block *)data;
 321         struct ll_sb_info *sbi = ll_s2sbi(sb);
 322
 323         /* checking for setting "." and ".." as object name */
 324         if (buffer[0] == '.') switch (count) {
 325                 case 2:
 326                         /* this is "." case with terminating zero */
 327                         return -EINVAL;
 328                 case 3:
 329                         /* this is ".." case with terminating zero */
 330                         if (buffer[1] == '.')
 331                                 return -EINVAL;
 332         }
 333
 334         down(&sbi->ll_gns_sem);
 335
 336         /*
 337          * upcall should not be the same as object name, check for possible
 338          * overflow.
 339          */
 340         if (count < sizeof(sbi->ll_gns_oname) &&
 341             (strlen(sbi->ll_gns_upcall) != count ||
 342              strncmp(sbi->ll_gns_upcall, buffer, count)))
 343                 snprintf(sbi->ll_gns_oname, count, "%s", buffer);
 344
 345         up(&sbi->ll_gns_sem);
 346         return count;
 347 }
 348
 349 static int ll_rd_gns_timeout(char *page, char **start, off_t off,
 350                              int count, int *eof, void *data)
 351 {
 352         struct super_block *sb = (struct super_block *)data;
 353         struct ll_sb_info *sbi = ll_s2sbi(sb);
 354         int len;
 355
 356         down(&sbi->ll_gns_sem);
 357         len = snprintf(page, count, "%lu\n",
 358                        (unsigned long)sbi->ll_gns_timeout);
 359         up(&sbi->ll_gns_sem);
 360
 361         return len;
 362 }
 363
 364 static int ll_wr_gns_timeout(struct file *file, const char *buffer,
 365                              unsigned long count, void *data)
 366 {
 367         struct super_block *sb = (struct super_block *)data;
 368         struct ll_sb_info *sbi = ll_s2sbi(sb);
 369         int val, rc;
 370
 371         rc = lprocfs_write_helper(buffer, count, &val);
 372         if (rc)
 373                 return rc;
 374
 375         down(&sbi->ll_gns_sem);
 376         if (val > sbi->ll_gns_tick)
 377                 sbi->ll_gns_timeout = val;
 378         up(&sbi->ll_gns_sem);
 379
 380         return count;
 381 }
 382
 383 static int ll_rd_gns_tick(char *page, char **start, off_t off,
 384                           int count, int *eof, void *data)
 385 {
 386         struct super_block *sb = (struct super_block *)data;
 387         struct ll_sb_info *sbi = ll_s2sbi(sb);
 388         int len;
 389
 390         down(&sbi->ll_gns_sem);
 391         len = snprintf(page, count, "%lu\n",
 392                        (unsigned long)sbi->ll_gns_tick);
 393         up(&sbi->ll_gns_sem);
 394
 395         return len;
 396 }
 397
 398 static int ll_wr_gns_tick(struct file *file, const char *buffer,
 399                           unsigned long count, void *data)
 400 {
 401         struct super_block *sb = (struct super_block *)data;
 402         struct ll_sb_info *sbi = ll_s2sbi(sb);
 403         int val, rc;
 404
 405         rc = lprocfs_write_helper(buffer, count, &val);
 406         if (rc)
 407                 return rc;
 408
 409         down(&sbi->ll_gns_sem);
 410         if (val < sbi->ll_gns_timeout)
 411                 sbi->ll_gns_tick = val;
 412         up(&sbi->ll_gns_sem);
 413
 414         return count;
 415 }
 416
 417 static int ll_rd_gns_enabled(char *page, char **start, off_t off,
 418                              int count, int *eof, void *data)
 419 {
 420         struct super_block *sb = (struct super_block *)data;
 421         struct ll_sb_info *sbi = ll_s2sbi(sb);
 422
 423         return snprintf(page, count, "%d\n",
 424                         atomic_read(&sbi->ll_gns_enabled));
 425 }
 426
 427 static int ll_wr_gns_enabled(struct file *file, const char *buffer,
 428                              unsigned long count, void *data)
 429 {
 430         struct super_block *sb = (struct super_block *)data;
 431         struct ll_sb_info *sbi = ll_s2sbi(sb);
 432         int val, rc;
 433
 434         rc = lprocfs_write_helper(buffer, count, &val);
 435         if (rc)
 436                 return rc;
 437
 438         atomic_set(&sbi->ll_gns_enabled, (val != 0 ? 1 : 0));
 439         return count;
 440 }
 441
 442 static struct lprocfs_vars lprocfs_obd_vars[] = {
 443         { "uuid",         ll_rd_sb_uuid,          0, 0 },
 444         //{ "mntpt_path",   ll_rd_path,             0, 0 },
 445         { "fstype",       ll_rd_fstype,           0, 0 },
 446         { "blocksize",    ll_rd_blksize,          0, 0 },
 447         { "kbytestotal",  ll_rd_kbytestotal,      0, 0 },
 448         { "kbytesfree",   ll_rd_kbytesfree,       0, 0 },
 449         { "kbytesavail",  ll_rd_kbytesavail,      0, 0 },
 450         { "filestotal",   ll_rd_filestotal,       0, 0 },
 451         { "filesfree",    ll_rd_filesfree,        0, 0 },
 452         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
 453         { "read_ahead",   ll_rd_read_ahead, ll_wr_read_ahead, 0 },
 454         { "config_update", 0, ll_wr_config_update, 0 },
 455         { "max_read_ahead_mb", ll_rd_max_read_ahead_mb,
 456                                ll_wr_max_read_ahead_mb, 0 },
 457
 458         { "gns_upcall", ll_rd_gns_upcall,
 459           ll_wr_gns_upcall, 0 },
 460
 461         { "gns_timeout", ll_rd_gns_timeout,
 462           ll_wr_gns_timeout, 0 },
 463
 464         { "gns_tick", ll_rd_gns_tick,
 465           ll_wr_gns_tick, 0 },
 466
 467         { "gns_enabled", ll_rd_gns_enabled,
 468           ll_wr_gns_enabled, 0 },
 469
 470         { "gns_object_name", ll_rd_gns_object_name,
 471           ll_wr_gns_object_name, 0 },
 472
 473         { 0 }
 474 };
 475
 476 #define MAX_STRING_SIZE 128
 477
 478 struct llite_file_opcode {
 479         __u32       opcode;
 480         __u32       type;
 481         const char *opname;
 482 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 483         /* file operation */
 484         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 485         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 486         { LPROC_LL_WB_WRITEPAGE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 487                                    "writeback_from_writepage" },
 488         { LPROC_LL_WB_PRESSURE,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 489                                    "writeback_from_pressure" },
 490         { LPROC_LL_WB_OK,          LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 491                                    "writeback_ok_pages" },
 492         { LPROC_LL_WB_FAIL,        LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 493                                    "writeback_failed_pages" },
 494         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 495                                    "read_bytes" },
 496         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 497                                    "write_bytes" },
 498         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 499                                    "brw_read" },
 500         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 501                                    "brw_write" },
 502
 503         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
 504         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 505         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
 506         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
 507         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
 508         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
 509         /* inode operation */
 510         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
 511         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "punch" },
 512 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
 513         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
 514 #else
 515         { LPROC_LL_REVALIDATE,     LPROCFS_TYPE_REGS, "getattr" },
 516 #endif
 517         /* special inode operation */
 518         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
 519         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 520         { LPROC_LL_DIRECT_READ,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 521                                    "direct_read" },
 522         { LPROC_LL_DIRECT_WRITE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 523                                    "direct_write" },
 524         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 525         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 526 };
 527
 528 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 529                                 struct super_block *sb, char *osc, char *mdc)
 530 {
 531         struct lprocfs_vars lvars[2];
 532         struct ll_sb_info *sbi = ll_s2sbi(sb);
 533         struct obd_device *obd;
 534         char name[MAX_STRING_SIZE + 1];
 535         int err, id;
 536         struct lprocfs_stats *svc_stats = NULL;
 537         struct proc_dir_entry *mdc_symlink, *osc_symlink;
 538         struct proc_dir_entry *entry;
 539         ENTRY;
 540
 541         memset(lvars, 0, sizeof(lvars));
 542
 543         name[MAX_STRING_SIZE] = '\0';
 544         lvars[0].name = name;
 545
 546         LASSERT(sbi != NULL);
 547         LASSERT(mdc != NULL);
 548         LASSERT(osc != NULL);
 549
 550         /* Mount info */
 551         snprintf(name, MAX_STRING_SIZE, "fs%llu", mnt_instance);
 552
 553         mnt_instance++;
 554         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 555         if (IS_ERR(sbi->ll_proc_root)) {
 556                 err = PTR_ERR(sbi->ll_proc_root);
 557                 sbi->ll_proc_root = NULL;
 558                 RETURN(err);
 559         }
 560
 561         entry = create_proc_entry("dump_page_cache", 0444, sbi->ll_proc_root);
 562         if (entry == NULL)
 563                 GOTO(out, err = -ENOMEM);
 564         entry->proc_fops = &llite_dump_pgcache_fops;
 565         entry->data = sbi;
 566
 567         entry = create_proc_entry("wait_times", 0444, sbi->ll_proc_root);
 568         if (entry == NULL)
 569                 GOTO(out, err = -ENOMEM);
 570         entry->proc_fops = &llite_wait_times_fops;
 571         entry->data = sbi;
 572
 573         entry = create_proc_entry("read_ahead_stats", 0444, sbi->ll_proc_root);
 574         if (entry == NULL)
 575                 GOTO(out, err = -ENOMEM);
 576         entry->proc_fops = &ll_ra_stats_fops;
 577         entry->data = sbi;
 578
 579         svc_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES);
 580         if (svc_stats == NULL) {
 581                 err = -ENOMEM;
 582                 goto out;
 583         }
 584         /* do counter init */
 585         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
 586                 __u32 type = llite_opcode_table[id].type;
 587                 void *ptr = NULL;
 588                 if (type & LPROCFS_TYPE_REGS)
 589                         ptr = "regs";
 590                 else {
 591                         if (type & LPROCFS_TYPE_BYTES)
 592                                 ptr = "bytes";
 593                         else {
 594                                 if (type & LPROCFS_TYPE_PAGES)
 595                                         ptr = "pages";
 596                         }
 597                 }
 598                 lprocfs_counter_init(svc_stats, llite_opcode_table[id].opcode,
 599                                      (type & LPROCFS_CNTR_AVGMINMAX),
 600                                      llite_opcode_table[id].opname, ptr);
 601         }
 602         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", svc_stats);
 603         if (err)
 604                 goto out;
 605         else
 606                 sbi->ll_stats = svc_stats;
 607         /* need place to keep svc_stats */
 608
 609         /* Static configuration info */
 610         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_obd_vars, sb);
 611         if (err)
 612                 goto out;
 613
 614         /* MDC info */
 615         obd = class_name2obd(mdc);
 616
 617         LASSERT(obd != NULL);
 618         LASSERT(obd->obd_type != NULL);
 619         LASSERT(obd->obd_type->typ_name != NULL);
 620
 621         snprintf(name, MAX_STRING_SIZE, "../../%s/%s",
 622                  obd->obd_type->typ_name, obd->obd_name);
 623         mdc_symlink = proc_symlink(obd->obd_type->typ_name, sbi->ll_proc_root,
 624                                    name);
 625         if (mdc_symlink == NULL) {
 626                 err = -ENOMEM;
 627                 goto out;
 628         }
 629
 630         /* OSC */
 631         obd = class_name2obd(osc);
 632
 633         LASSERT(obd != NULL);
 634         LASSERT(obd->obd_type != NULL);
 635         LASSERT(obd->obd_type->typ_name != NULL);
 636
 637        snprintf(name, MAX_STRING_SIZE, "../../%s/%s",
 638                 obd->obd_type->typ_name, obd->obd_name);
 639        osc_symlink = proc_symlink(obd->obd_type->typ_name, sbi->ll_proc_root,
 640                                   name);
 641        if (osc_symlink == NULL)
 642                err = -ENOMEM;
 643
 644
 645 out:
 646         if (err) {
 647                 if (svc_stats)
 648                         lprocfs_free_stats(svc_stats);
 649                 if (sbi->ll_proc_root)
 650                         lprocfs_remove(sbi->ll_proc_root);
 651         }
 652         RETURN(err);
 653 }
 654
 655 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
 656 {
 657         if (sbi->ll_proc_root) {
 658                 struct proc_dir_entry *file_stats =
 659                         lprocfs_srch(sbi->ll_proc_root, "stats");
 660
 661                 if (file_stats) {
 662                         lprocfs_free_stats(sbi->ll_stats);
 663                         lprocfs_remove(file_stats);
 664                 }
 665         }
 666 }
 667 #undef MAX_STRING_SIZE
 668
 669 static struct ll_async_page *llite_pglist_next_llap(struct ll_sb_info *sbi,
 670                                                     struct list_head *list)
 671 {
 672         struct ll_async_page *llap;
 673         struct list_head *pos;
 674
 675         list_for_each(pos, list) {
 676                 if (pos == &sbi->ll_pglist)
 677                         return NULL;
 678                 llap = list_entry(pos, struct ll_async_page, llap_proc_item);
 679                 if (llap->llap_page == NULL)
 680                         continue;
 681                 return llap;
 682         }
 683         LBUG();
 684         return NULL;
 685 }
 686
 687 #define seq_page_flag(seq, page, flag, has_flags) do {                  \
 688                 if (test_bit(PG_##flag, &(page)->flags)) {              \
 689                         if (!has_flags)                                 \
 690                                 has_flags = 1;                          \
 691                         else                                            \
 692                                 seq_putc(seq, '|');                     \
 693                         seq_puts(seq, #flag);                           \
 694                 }                                                       \
 695         } while(0);
 696
 697 static int llite_dump_pgcache_seq_show(struct seq_file *seq, void *v)
 698 {
 699         struct ll_async_page *llap, *dummy_llap = seq->private;
 700         struct ll_sb_info *sbi = dummy_llap->llap_cookie;
 701
 702         /* 2.4 doesn't seem to have SEQ_START_TOKEN, so we implement
 703          * it in our own state */
 704         if (dummy_llap->llap_magic == 0) {
 705                 seq_printf(seq, "generation | llap cookie origin | page ");
 706                 seq_printf(seq, "inode index count [ page flags ]\n");
 707                 return 0;
 708         }
 709
 710         spin_lock(&sbi->ll_lock);
 711
 712         llap = llite_pglist_next_llap(sbi, &dummy_llap->llap_proc_item);
 713         if (llap != NULL)  {
 714                 int has_flags = 0;
 715                 struct page *page = llap->llap_page;
 716                 static char *origins[] = {
 717                         [LLAP_ORIGIN_UNKNOWN] = "--",
 718                         [LLAP_ORIGIN_READPAGE] = "rp",
 719                         [LLAP_ORIGIN_READAHEAD] = "ra",
 720                         [LLAP_ORIGIN_COMMIT_WRITE] = "cw",
 721                         [LLAP_ORIGIN_WRITEPAGE] = "wp",
 722                 };
 723
 724                 LASSERTF(llap->llap_origin < LLAP__ORIGIN_MAX, "%u\n",
 725                          llap->llap_origin);
 726
 727                 seq_printf(seq, "%lu | %p %p %s | %p %p %lu %u [",
 728                                 sbi->ll_pglist_gen,
 729                                 llap, llap->llap_cookie,
 730                                 origins[llap->llap_origin],
 731                                 page, page->mapping->host, page->index,
 732                                 page_count(page));
 733                 seq_page_flag(seq, page, locked, has_flags);
 734                 seq_page_flag(seq, page, error, has_flags);
 735                 seq_page_flag(seq, page, referenced, has_flags);
 736                 seq_page_flag(seq, page, uptodate, has_flags);
 737                 seq_page_flag(seq, page, dirty, has_flags);
 738                 seq_page_flag(seq, page, highmem, has_flags);
 739                 if (!has_flags)
 740                         seq_puts(seq, "-]\n");
 741                 else
 742                         seq_puts(seq, "]\n");
 743         }
 744
 745         spin_unlock(&sbi->ll_lock);
 746
 747         return 0;
 748 }
 749
 750 static void *llite_dump_pgcache_seq_start(struct seq_file *seq, loff_t *pos)
 751 {
 752         struct ll_async_page *llap = seq->private;
 753
 754         if (llap->llap_magic == 2)
 755                 return NULL;
 756
 757         return (void *)1;
 758 }
 759
 760 static void *llite_dump_pgcache_seq_next(struct seq_file *seq, void *v,
 761                                          loff_t *pos)
 762 {
 763         struct ll_async_page *llap, *dummy_llap = seq->private;
 764         struct ll_sb_info *sbi = dummy_llap->llap_cookie;
 765
 766         /* bail if we just displayed the banner */
 767         if (dummy_llap->llap_magic == 0) {
 768                 dummy_llap->llap_magic = 1;
 769                 return dummy_llap;
 770         }
 771
 772         /* we've just displayed the llap that is after us in the list.
 773          * we advance to a position beyond it, returning null if there
 774          * isn't another llap in the list beyond that new position. */
 775         spin_lock(&sbi->ll_lock);
 776         llap = llite_pglist_next_llap(sbi, &dummy_llap->llap_proc_item);
 777         list_del_init(&dummy_llap->llap_proc_item);
 778         if (llap) {
 779                 list_add(&dummy_llap->llap_proc_item, &llap->llap_proc_item);
 780                 llap = llite_pglist_next_llap(sbi, &dummy_llap->llap_proc_item);
 781         }
 782         spin_unlock(&sbi->ll_lock);
 783
 784         ++*pos;
 785         if (llap == NULL) {
 786                 dummy_llap->llap_magic = 2;
 787                 return NULL;
 788         }
 789         return dummy_llap;
 790 }
 791
 792 static void llite_dump_pgcache_seq_stop(struct seq_file *seq, void *v)
 793 {
 794 }
 795
 796 struct seq_operations llite_dump_pgcache_seq_sops = {
 797         .start = llite_dump_pgcache_seq_start,
 798         .stop = llite_dump_pgcache_seq_stop,
 799         .next = llite_dump_pgcache_seq_next,
 800         .show = llite_dump_pgcache_seq_show,
 801 };
 802
 803 /* we're displaying llaps in a list_head list.  we don't want to hold a lock
 804  * while we walk the entire list, and we don't want to have to seek into
 805  * the right position in the list as an app advances with many syscalls.  we
 806  * allocate a dummy llap and hang it off file->private.  its position in
 807  * the list records where the app is currently displaying.  this way our
 808  * seq .start and .stop don't actually do anything.  .next returns null
 809  * when the dummy hits the end of the list which eventually leads to .release
 810  * where we tear down.  this kind of displaying is super-racey, so we put
 811  * a generation counter on the list so the output shows when the list
 812  * changes between reads.
 813  */
 814 static int llite_dump_pgcache_seq_open(struct inode *inode, struct file *file)
 815 {
 816         struct proc_dir_entry *dp = PDE(inode);
 817         struct ll_async_page *llap;
 818         struct seq_file *seq;
 819         struct ll_sb_info *sbi = dp->data;
 820         int rc;
 821
 822         OBD_ALLOC_GFP(llap, sizeof(*llap), GFP_KERNEL);
 823         if (llap == NULL)
 824                 return -ENOMEM;
 825         llap->llap_page = NULL;
 826         llap->llap_cookie = sbi;
 827         llap->llap_magic = 0;
 828
 829         rc = seq_open(file, &llite_dump_pgcache_seq_sops);
 830         if (rc) {
 831                 OBD_FREE(llap, sizeof(*llap));
 832                 return rc;
 833         }
 834         seq = file->private_data;
 835         seq->private = llap;
 836
 837         spin_lock(&sbi->ll_lock);
 838         list_add(&llap->llap_proc_item, &sbi->ll_pglist);
 839         spin_unlock(&sbi->ll_lock);
 840
 841         return 0;
 842 }
 843
 844 static int llite_dump_pgcache_seq_release(struct inode *inode,
 845                                           struct file *file)
 846 {
 847         struct seq_file *seq = file->private_data;
 848         struct ll_async_page *llap = seq->private;
 849         struct ll_sb_info *sbi = llap->llap_cookie;
 850
 851         spin_lock(&sbi->ll_lock);
 852         if (!list_empty(&llap->llap_proc_item))
 853                 list_del_init(&llap->llap_proc_item);
 854         spin_unlock(&sbi->ll_lock);
 855         OBD_FREE(llap, sizeof(*llap));
 856
 857         return seq_release(inode, file);
 858 }
 859
 860 struct file_operations llite_dump_pgcache_fops = {
 861         .owner   = THIS_MODULE,
 862         .open    = llite_dump_pgcache_seq_open,
 863         .read    = seq_read,
 864         .release = llite_dump_pgcache_seq_release,
 865 };
 866 static int ll_ra_stats_seq_show(struct seq_file *seq, void *v)
 867 {
 868         struct timeval now;
 869         struct ll_sb_info *sbi = seq->private;
 870         struct ll_ra_info *ra = &sbi->ll_ra_info;
 871         int i;
 872         static char *ra_stat_strings[] = {
 873                 [RA_STAT_HIT] = "hits",
 874                 [RA_STAT_MISS] = "misses",
 875                 [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 876                 [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 877                 [RA_STAT_FAILED_MATCH] = "failed lock match",
 878                 [RA_STAT_DISCARDED] = "read but discarded",
 879                 [RA_STAT_ZERO_LEN] = "zero length file",
 880                 [RA_STAT_ZERO_WINDOW] = "zero size window",
 881                 [RA_STAT_EOF] = "read-ahead to EOF",
 882                 [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 883         };
 884
 885         do_gettimeofday(&now);
 886
 887         spin_lock(&sbi->ll_lock);
 888
 889         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 890                    now.tv_sec, now.tv_usec);
 891         seq_printf(seq, "pending issued pages:           %lu\n",
 892                    ra->ra_cur_pages);
 893
 894         for(i = 0; i < _NR_RA_STAT; i++)
 895                 seq_printf(seq, "%-25s %lu\n", ra_stat_strings[i],
 896                            ra->ra_stats[i]);
 897
 898         spin_unlock(&sbi->ll_lock);
 899
 900         return 0;
 901 }
 902
 903 static void *ll_ra_stats_seq_start(struct seq_file *p, loff_t *pos)
 904 {
 905         if (*pos == 0)
 906                 return (void *)1;
 907         return NULL;
 908 }
 909 static void *ll_ra_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
 910 {
 911         ++*pos;
 912         return NULL;
 913 }
 914 static void ll_ra_stats_seq_stop(struct seq_file *p, void *v)
 915 {
 916 }
 917 struct seq_operations ll_ra_stats_seq_sops = {
 918         .start = ll_ra_stats_seq_start,
 919         .stop = ll_ra_stats_seq_stop,
 920         .next = ll_ra_stats_seq_next,
 921         .show = ll_ra_stats_seq_show,
 922 };
 923
 924 static int ll_ra_stats_seq_open(struct inode *inode, struct file *file)
 925 {
 926         struct proc_dir_entry *dp = PDE(inode);
 927         struct seq_file *seq;
 928         int rc;
 929
 930         rc = seq_open(file, &ll_ra_stats_seq_sops);
 931         if (rc)
 932                 return rc;
 933         seq = file->private_data;
 934         seq->private = dp->data;
 935         return 0;
 936 }
 937
 938 static ssize_t ll_ra_stats_seq_write(struct file *file, const char *buf,
 939                                        size_t len, loff_t *off)
 940 {
 941         struct seq_file *seq = file->private_data;
 942         struct ll_sb_info *sbi = seq->private;
 943         struct ll_ra_info *ra = &sbi->ll_ra_info;
 944
 945         spin_lock(&sbi->ll_lock);
 946         memset(ra->ra_stats, 0, sizeof(ra->ra_stats));
 947         spin_unlock(&sbi->ll_lock);
 948
 949         return len;
 950 }
 951
 952 struct file_operations ll_ra_stats_fops = {
 953         .owner   = THIS_MODULE,
 954         .open    = ll_ra_stats_seq_open,
 955         .read    = seq_read,
 956         .write   = ll_ra_stats_seq_write,
 957         .llseek  = seq_lseek,
 958         .release = seq_release,
 959 };
 960
 961 #define PRINTF_STIME(stime) (unsigned long)(stime)->st_num,     \
 962         lprocfs_stime_avg_ms(stime), lprocfs_stime_avg_us(stime)
 963
 964 static int llite_wait_times_seq_show(struct seq_file *seq, void *v)
 965 {
 966         struct ll_sb_info *sbi = seq->private;
 967         struct timeval now;
 968
 969         do_gettimeofday(&now);
 970
 971         spin_lock(&sbi->ll_lock);
 972
 973         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n\n",
 974                    now.tv_sec, now.tv_usec);
 975
 976         seq_printf(seq, "lock wait times: (num, average ms)\n");
 977         seq_printf(seq, "\tread\t%lu\t%lu.%04lu\n",
 978                         PRINTF_STIME(&sbi->ll_read_stime));
 979         seq_printf(seq, "\twrite\t%lu\t%lu.%04lu\n",
 980                         PRINTF_STIME(&sbi->ll_write_stime));
 981         seq_printf(seq, "\tgroup\t%lu\t%lu.%04lu\n",
 982                         PRINTF_STIME(&sbi->ll_grouplock_stime));
 983         seq_printf(seq, "\tseek\t%lu\t%lu.%04lu\n",
 984                         PRINTF_STIME(&sbi->ll_seek_stime));
 985         seq_printf(seq, "\tsetattr\t%lu\t%lu.%04lu\n\n",
 986                         PRINTF_STIME(&sbi->ll_setattr_stime));
 987
 988         seq_printf(seq, "io path wait times: (num, average ms)\n");
 989         seq_printf(seq, "\tll_brw\t%lu\t%lu.%04lu\n",
 990                         PRINTF_STIME(&sbi->ll_brw_stime));
 991 #if 0
 992         seq_printf(seq, "\tdone\t%lu\t%lu.%04lu\n",
 993                         PRINTF_STIME(&sbi->ll_done_stime));
 994 #endif
 995
 996         spin_unlock(&sbi->ll_lock);
 997
 998         return 0;
 999 }
1000 #undef pct
1001
1002 static void *llite_wait_times_seq_start(struct seq_file *p, loff_t *pos)
1003 {
1004         if (*pos == 0)
1005                 return (void *)1;
1006         return NULL;
1007 }
1008 static void *llite_wait_times_seq_next(struct seq_file *p, void *v, loff_t *pos)
1009 {
1010         ++*pos;
1011         return NULL;
1012 }
1013 static void llite_wait_times_seq_stop(struct seq_file *p, void *v)
1014 {
1015 }
1016 struct seq_operations llite_wait_times_seq_sops = {
1017         .start = llite_wait_times_seq_start,
1018         .stop = llite_wait_times_seq_stop,
1019         .next = llite_wait_times_seq_next,
1020         .show = llite_wait_times_seq_show,
1021 };
1022
1023 static int llite_wait_times_seq_open(struct inode *inode, struct file *file)
1024 {
1025         struct proc_dir_entry *dp = PDE(inode);
1026         struct seq_file *seq;
1027         int rc;
1028
1029         rc = seq_open(file, &llite_wait_times_seq_sops);
1030         if (rc)
1031                 return rc;
1032         seq = file->private_data;
1033         seq->private = dp->data;
1034         return 0;
1035 }
1036
1037 static ssize_t llite_wait_times_seq_write(struct file *file, const char *buf,
1038                                        size_t len, loff_t *off)
1039 {
1040         struct seq_file *seq = file->private_data;
1041         struct ll_sb_info *sbi = seq->private;
1042
1043         spin_lock(&sbi->ll_lock);
1044         memset(&sbi->ll_read_stime, 0, sizeof(sbi->ll_read_stime));
1045         memset(&sbi->ll_write_stime, 0, sizeof(sbi->ll_write_stime));
1046         memset(&sbi->ll_grouplock_stime, 0, sizeof(sbi->ll_grouplock_stime));
1047         memset(&sbi->ll_seek_stime, 0, sizeof(sbi->ll_seek_stime));
1048         memset(&sbi->ll_setattr_stime, 0, sizeof(sbi->ll_setattr_stime));
1049         memset(&sbi->ll_brw_stime, 0, sizeof(sbi->ll_brw_stime));
1050 //        memset(&sbi->ll_done_stime, 0, sizeof(sbi->ll_done_stime));
1051         spin_unlock(&sbi->ll_lock);
1052
1053         return len;
1054 }
1055
1056 struct file_operations llite_wait_times_fops = {
1057         .owner   = THIS_MODULE,
1058         .open    = llite_wait_times_seq_open,
1059         .read    = seq_read,
1060         .write   = llite_wait_times_seq_write,
1061         .llseek  = seq_lseek,
1062         .release = seq_release,
1063 };
1064
1065 #endif /* LPROCFS */