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