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