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
  30 #include "llite_internal.h"
  31
  32 /* /proc/lustre/llite mount point registration */
  33 struct proc_dir_entry *proc_lustre_fs_root;
  34 struct file_operations llite_dump_pgcache_fops;
  35 struct file_operations ll_ra_stats_fops;
  36 struct file_operations llite_wait_times_fops;
  37
  38 #ifndef LPROCFS
  39 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
  40                                 struct super_block *sb, char *osc, char *mdc)
  41 {
  42         return 0;
  43 }
  44 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi){}
  45 #else
  46
  47 long long mnt_instance;
  48
  49 static int ll_rd_blksize(char *page, char **start, off_t off, int count,
  50                          int *eof, void *data)
  51 {
  52         struct super_block *sb = (struct super_block *)data;
  53         struct obd_statfs osfs;
  54         int rc;
  55
  56         LASSERT(sb != NULL);
  57         rc = ll_statfs_internal(sb, &osfs, jiffies - HZ);
  58         if (!rc) {
  59               *eof = 1;
  60               rc = snprintf(page, count, "%u\n", osfs.os_bsize);
  61         }
  62
  63         return rc;
  64 }
  65
  66 static int ll_rd_kbytestotal(char *page, char **start, off_t off, int count,
  67                              int *eof, void *data)
  68 {
  69         struct super_block *sb = (struct super_block *)data;
  70         struct obd_statfs osfs;
  71         int rc;
  72
  73         LASSERT(sb != NULL);
  74         rc = ll_statfs_internal(sb, &osfs, jiffies - HZ);
  75         if (!rc) {
  76                 __u32 blk_size = osfs.os_bsize >> 10;
  77                 __u64 result = osfs.os_blocks;
  78
  79                 while (blk_size >>= 1)
  80                         result <<= 1;
  81
  82                 *eof = 1;
  83                 rc = snprintf(page, count, LPU64"\n", result);
  84         }
  85         return rc;
  86
  87 }
  88
  89 static int ll_rd_kbytesfree(char *page, char **start, off_t off, int count,
  90                             int *eof, void *data)
  91 {
  92         struct super_block *sb = (struct super_block *)data;
  93         struct obd_statfs osfs;
  94         int rc;
  95
  96         LASSERT(sb != NULL);
  97         rc = ll_statfs_internal(sb, &osfs, jiffies - HZ);
  98         if (!rc) {
  99                 __u32 blk_size = osfs.os_bsize >> 10;
 100                 __u64 result = osfs.os_bfree;
 101
 102                 while (blk_size >>= 1)
 103                         result <<= 1;
 104
 105                 *eof = 1;
 106                 rc = snprintf(page, count, LPU64"\n", result);
 107         }
 108         return rc;
 109 }
 110
 111 static int ll_rd_kbytesavail(char *page, char **start, off_t off, int count,
 112                              int *eof, void *data)
 113 {
 114         struct super_block *sb = (struct super_block *)data;
 115         struct obd_statfs osfs;
 116         int rc;
 117
 118         LASSERT(sb != NULL);
 119         rc = ll_statfs_internal(sb, &osfs, jiffies - HZ);
 120         if (!rc) {
 121                 __u32 blk_size = osfs.os_bsize >> 10;
 122                 __u64 result = osfs.os_bavail;
 123
 124                 while (blk_size >>= 1)
 125                         result <<= 1;
 126
 127                 *eof = 1;
 128                 rc = snprintf(page, count, LPU64"\n", result);
 129         }
 130         return rc;
 131 }
 132
 133 static int ll_rd_filestotal(char *page, char **start, off_t off, int count,
 134                             int *eof, void *data)
 135 {
 136         struct super_block *sb = (struct super_block *)data;
 137         struct obd_statfs osfs;
 138         int rc;
 139
 140         LASSERT(sb != NULL);
 141         rc = ll_statfs_internal(sb, &osfs, jiffies - HZ);
 142         if (!rc) {
 143                  *eof = 1;
 144                  rc = snprintf(page, count, LPU64"\n", osfs.os_files);
 145         }
 146         return rc;
 147 }
 148
 149 static int ll_rd_filesfree(char *page, char **start, off_t off, int count,
 150                            int *eof, void *data)
 151 {
 152         struct super_block *sb = (struct super_block *)data;
 153         struct obd_statfs osfs;
 154         int rc;
 155
 156         LASSERT(sb != NULL);
 157         rc = ll_statfs_internal(sb, &osfs, jiffies - HZ);
 158         if (!rc) {
 159                  *eof = 1;
 160                  rc = snprintf(page, count, LPU64"\n", osfs.os_ffree);
 161         }
 162         return rc;
 163
 164 }
 165
 166 static int ll_rd_fstype(char *page, char **start, off_t off, int count,
 167                         int *eof, void *data)
 168 {
 169         struct super_block *sb = (struct super_block*)data;
 170
 171         LASSERT(sb != NULL);
 172         *eof = 1;
 173         return snprintf(page, count, "%s\n", sb->s_type->name);
 174 }
 175
 176 static int ll_rd_sb_uuid(char *page, char **start, off_t off, int count,
 177                          int *eof, void *data)
 178 {
 179         struct super_block *sb = (struct super_block *)data;
 180
 181         LASSERT(sb != NULL);
 182         *eof = 1;
 183         return snprintf(page, count, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
 184 }
 185
 186 static int ll_rd_read_ahead(char *page, char **start, off_t off, int count,
 187                             int *eof, void *data)
 188 {
 189         struct super_block *sb = (struct super_block*)data;
 190         struct ll_sb_info *sbi = ll_s2sbi(sb);
 191         int val, rc;
 192         ENTRY;
 193
 194         *eof = 1;
 195         val = (sbi->ll_flags & LL_SBI_READAHEAD) ? 1 : 0;
 196         rc = snprintf(page, count, "%d\n", val);
 197         RETURN(rc);
 198 }
 199
 200 static int ll_wr_read_ahead(struct file *file, const char *buffer,
 201                             unsigned long count, void *data)
 202 {
 203         struct super_block *sb = (struct super_block*)data;
 204         struct ll_sb_info *sbi = ll_s2sbi(sb);
 205         int readahead;
 206         ENTRY;
 207
 208         if (sscanf(buffer, "%d", &readahead) != 1)
 209                 RETURN(-EINVAL);
 210
 211         if (readahead)
 212                 sbi->ll_flags |= LL_SBI_READAHEAD;
 213         else
 214                 sbi->ll_flags &= ~LL_SBI_READAHEAD;
 215
 216         RETURN(count);
 217 }
 218
 219 static int ll_wr_config_update(struct file *file, const char *buffer,
 220                                unsigned long count, void *data)
 221 {
 222         struct super_block *sb = (struct super_block*)data;
 223         struct ll_sb_info *sbi = ll_s2sbi(sb);
 224         ENTRY;
 225
 226         CWARN("Starting a LOV/OST update !\n");
 227         RETURN(ll_process_config_update(sbi, 0));
 228 }
 229
 230 static int ll_rd_max_read_ahead_mb(char *page, char **start, off_t off,
 231                                    int count, int *eof, void *data)
 232 {
 233         struct super_block *sb = data;
 234         struct ll_sb_info *sbi = ll_s2sbi(sb);
 235         unsigned val;
 236
 237         spin_lock(&sbi->ll_lock);
 238         val = (sbi->ll_ra_info.ra_max_pages << PAGE_CACHE_SHIFT) >> 20;
 239         spin_unlock(&sbi->ll_lock);
 240
 241         return snprintf(page, count, "%u\n", val);
 242 }
 243
 244 static int ll_wr_max_read_ahead_mb(struct file *file, const char *buffer,
 245                                    unsigned long count, void *data)
 246 {
 247         struct super_block *sb = data;
 248         struct ll_sb_info *sbi = ll_s2sbi(sb);
 249         int val, rc;
 250
 251         rc = lprocfs_write_helper(buffer, count, &val);
 252         if (rc)
 253                 return rc;
 254
 255         if (val < 0 || val > (num_physpages << PAGE_SHIFT) >> 20)
 256                 return -ERANGE;
 257
 258         spin_lock(&sbi->ll_lock);
 259         sbi->ll_ra_info.ra_max_pages = (val << 20) >> PAGE_CACHE_SHIFT;
 260         spin_unlock(&sbi->ll_lock);
 261
 262         return count;
 263 }
 264
 265 static int ll_rd_gns_upcall(char *page, char **start, off_t off,
 266                             int count, int *eof, void *data)
 267 {
 268         struct super_block *sb = (struct super_block *)data;
 269         struct ll_sb_info *sbi = ll_s2sbi(sb);
 270         int len;
 271
 272         down(&sbi->ll_gns_sem);
 273         len = snprintf(page, count, "%s\n", sbi->ll_gns_upcall);
 274         up(&sbi->ll_gns_sem);
 275
 276         return len;
 277 }
 278
 279 static int ll_wr_gns_upcall(struct file *file, const char *buffer,
 280                             unsigned long count, void *data)
 281 {
 282         struct super_block *sb = (struct super_block *)data;
 283         struct ll_sb_info *sbi = ll_s2sbi(sb);
 284
 285         down(&sbi->ll_gns_sem);
 286         snprintf(sbi->ll_gns_upcall, count, "%s", buffer);
 287         up(&sbi->ll_gns_sem);
 288
 289         return count;
 290 }
 291
 292 static int ll_rd_gns_object_name(char *page, char **start, off_t off,
 293                                  int count, int *eof, void *data)
 294 {
 295         struct super_block *sb = (struct super_block *)data;
 296         struct ll_sb_info *sbi = ll_s2sbi(sb);
 297         int len;
 298
 299         down(&sbi->ll_gns_sem);
 300         len = snprintf(page, count, "%s\n", sbi->ll_gns_oname);
 301         up(&sbi->ll_gns_sem);
 302
 303         return len;
 304 }
 305
 306 static int ll_wr_gns_object_name(struct file *file, const char *buffer,
 307                                  unsigned long count, void *data)
 308 {
 309         struct super_block *sb = (struct super_block *)data;
 310         struct ll_sb_info *sbi = ll_s2sbi(sb);
 311
 312         down(&sbi->ll_gns_sem);
 313         snprintf(sbi->ll_gns_oname, count, "%s", buffer);
 314         up(&sbi->ll_gns_sem);
 315
 316         return count;
 317 }
 318
 319 static int ll_rd_gns_timeout(char *page, char **start, off_t off,
 320                              int count, int *eof, void *data)
 321 {
 322         struct super_block *sb = (struct super_block *)data;
 323         struct ll_sb_info *sbi = ll_s2sbi(sb);
 324         int len;
 325
 326         down(&sbi->ll_gns_sem);
 327         len = snprintf(page, count, "%lu\n",
 328                        (unsigned long)sbi->ll_gns_timeout);
 329         up(&sbi->ll_gns_sem);
 330
 331         return len;
 332 }
 333
 334 static int ll_wr_gns_timeout(struct file *file, const char *buffer,
 335                              unsigned long count, void *data)
 336 {
 337         struct super_block *sb = (struct super_block *)data;
 338         struct ll_sb_info *sbi = ll_s2sbi(sb);
 339         int val, rc;
 340
 341         rc = lprocfs_write_helper(buffer, count, &val);
 342         if (rc)
 343                 return rc;
 344
 345         down(&sbi->ll_gns_sem);
 346         sbi->ll_gns_timeout = val;
 347         up(&sbi->ll_gns_sem);
 348
 349         return count;
 350 }
 351
 352 static int ll_rd_gns_tick(char *page, char **start, off_t off,
 353                           int count, int *eof, void *data)
 354 {
 355         struct super_block *sb = (struct super_block *)data;
 356         struct ll_sb_info *sbi = ll_s2sbi(sb);
 357         int len;
 358
 359         down(&sbi->ll_gns_sem);
 360         len = snprintf(page, count, "%lu\n",
 361                        (unsigned long)sbi->ll_gns_tick);
 362         up(&sbi->ll_gns_sem);
 363
 364         return len;
 365 }
 366
 367 static int ll_wr_gns_tick(struct file *file, const char *buffer,
 368                           unsigned long count, void *data)
 369 {
 370         struct super_block *sb = (struct super_block *)data;
 371         struct ll_sb_info *sbi = ll_s2sbi(sb);
 372         int val, rc;
 373
 374         rc = lprocfs_write_helper(buffer, count, &val);
 375         if (rc)
 376                 return rc;
 377
 378         down(&sbi->ll_gns_sem);
 379         if (sbi->ll_gns_tick < sbi->ll_gns_timeout)
 380                 sbi->ll_gns_tick = val;
 381         up(&sbi->ll_gns_sem);
 382
 383         return count;
 384 }
 385 static struct lprocfs_vars lprocfs_obd_vars[] = {
 386         { "uuid",         ll_rd_sb_uuid,          0, 0 },
 387         //{ "mntpt_path",   ll_rd_path,             0, 0 },
 388         { "fstype",       ll_rd_fstype,           0, 0 },
 389         { "blocksize",    ll_rd_blksize,          0, 0 },
 390         { "kbytestotal",  ll_rd_kbytestotal,      0, 0 },
 391         { "kbytesfree",   ll_rd_kbytesfree,       0, 0 },
 392         { "kbytesavail",  ll_rd_kbytesavail,      0, 0 },
 393         { "filestotal",   ll_rd_filestotal,       0, 0 },
 394         { "filesfree",    ll_rd_filesfree,        0, 0 },
 395         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
 396         { "read_ahead",   ll_rd_read_ahead, ll_wr_read_ahead, 0 },
 397         { "config_update", 0, ll_wr_config_update, 0 },
 398         { "max_read_ahead_mb", ll_rd_max_read_ahead_mb,
 399                                ll_wr_max_read_ahead_mb, 0 },
 400
 401         { "gns_upcall", ll_rd_gns_upcall,
 402           ll_wr_gns_upcall, 0 },
 403
 404         { "gns_timeout", ll_rd_gns_timeout,
 405           ll_wr_gns_timeout, 0 },
 406
 407         { "gns_tick", ll_rd_gns_tick,
 408           ll_wr_gns_tick, 0 },
 409
 410         { "gns_object_name", ll_rd_gns_object_name,
 411           ll_wr_gns_object_name, 0 },
 412
 413         { 0 }
 414 };
 415
 416 #define MAX_STRING_SIZE 128
 417
 418 struct llite_file_opcode {
 419         __u32       opcode;
 420         __u32       type;
 421         const char *opname;
 422 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 423         /* file operation */
 424         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 425         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 426         { LPROC_LL_WB_WRITEPAGE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 427                                    "writeback_from_writepage" },
 428         { LPROC_LL_WB_PRESSURE,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 429                                    "writeback_from_pressure" },
 430         { LPROC_LL_WB_OK,          LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 431                                    "writeback_ok_pages" },
 432         { LPROC_LL_WB_FAIL,        LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 433                                    "writeback_failed_pages" },
 434         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 435                                    "read_bytes" },
 436         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 437                                    "write_bytes" },
 438         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 439                                    "brw_read" },
 440         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 441                                    "brw_write" },
 442
 443         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
 444         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 445         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
 446         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
 447         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
 448         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
 449         /* inode operation */
 450         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
 451         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "punch" },
 452 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
 453         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
 454 #else
 455         { LPROC_LL_REVALIDATE,     LPROCFS_TYPE_REGS, "getattr" },
 456 #endif
 457         /* special inode operation */
 458         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
 459         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 460         { LPROC_LL_DIRECT_READ,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 461                                    "direct_read" },
 462         { LPROC_LL_DIRECT_WRITE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 463                                    "direct_write" },
 464         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 465         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 466 };
 467
 468 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 469                                 struct super_block *sb, char *osc, char *mdc)
 470 {
 471         struct lprocfs_vars lvars[2];
 472         struct ll_sb_info *sbi = ll_s2sbi(sb);
 473         struct obd_device *obd;
 474         char name[MAX_STRING_SIZE + 1];
 475         int err, id;
 476         struct lprocfs_stats *svc_stats = NULL;
 477         struct proc_dir_entry *mdc_symlink, *osc_symlink;
 478         struct proc_dir_entry *entry;
 479         ENTRY;
 480
 481         memset(lvars, 0, sizeof(lvars));
 482
 483         name[MAX_STRING_SIZE] = '\0';
 484         lvars[0].name = name;
 485
 486         LASSERT(sbi != NULL);
 487         LASSERT(mdc != NULL);
 488         LASSERT(osc != NULL);
 489
 490         /* Mount info */
 491         snprintf(name, MAX_STRING_SIZE, "fs%llu", mnt_instance);
 492
 493         mnt_instance++;
 494         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 495         if (IS_ERR(sbi->ll_proc_root)) {
 496                 err = PTR_ERR(sbi->ll_proc_root);
 497                 sbi->ll_proc_root = NULL;
 498                 RETURN(err);
 499         }
 500
 501         entry = create_proc_entry("dump_page_cache", 0444, sbi->ll_proc_root);
 502         if (entry == NULL)
 503                 GOTO(out, err = -ENOMEM);
 504         entry->proc_fops = &llite_dump_pgcache_fops;
 505         entry->data = sbi;
 506
 507         entry = create_proc_entry("wait_times", 0444, sbi->ll_proc_root);
 508         if (entry == NULL)
 509                 GOTO(out, err = -ENOMEM);
 510         entry->proc_fops = &llite_wait_times_fops;
 511         entry->data = sbi;
 512
 513         entry = create_proc_entry("read_ahead_stats", 0444, sbi->ll_proc_root);
 514         if (entry == NULL)
 515                 GOTO(out, err = -ENOMEM);
 516         entry->proc_fops = &ll_ra_stats_fops;
 517         entry->data = sbi;
 518
 519         svc_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES);
 520         if (svc_stats == NULL) {
 521                 err = -ENOMEM;
 522                 goto out;
 523         }
 524         /* do counter init */
 525         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
 526                 __u32 type = llite_opcode_table[id].type;
 527                 void *ptr = NULL;
 528                 if (type & LPROCFS_TYPE_REGS)
 529                         ptr = "regs";
 530                 else {
 531                         if (type & LPROCFS_TYPE_BYTES)
 532                                 ptr = "bytes";
 533                         else {
 534                                 if (type & LPROCFS_TYPE_PAGES)
 535                                         ptr = "pages";
 536                         }
 537                 }
 538                 lprocfs_counter_init(svc_stats, llite_opcode_table[id].opcode,
 539                                      (type & LPROCFS_CNTR_AVGMINMAX),
 540                                      llite_opcode_table[id].opname, ptr);
 541         }
 542         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", svc_stats);
 543         if (err)
 544                 goto out;
 545         else
 546                 sbi->ll_stats = svc_stats;
 547         /* need place to keep svc_stats */
 548
 549         /* Static configuration info */
 550         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_obd_vars, sb);
 551         if (err)
 552                 goto out;
 553
 554         /* MDC info */
 555         obd = class_name2obd(mdc);
 556
 557         LASSERT(obd != NULL);
 558         LASSERT(obd->obd_type != NULL);
 559         LASSERT(obd->obd_type->typ_name != NULL);
 560
 561         snprintf(name, MAX_STRING_SIZE, "../../%s/%s",
 562                  obd->obd_type->typ_name, obd->obd_name);
 563         mdc_symlink = proc_symlink(obd->obd_type->typ_name, sbi->ll_proc_root,
 564                                    name);
 565         if (mdc_symlink == NULL) {
 566                 err = -ENOMEM;
 567                 goto out;
 568         }
 569
 570         /* OSC */
 571         obd = class_name2obd(osc);
 572
 573         LASSERT(obd != NULL);
 574         LASSERT(obd->obd_type != NULL);
 575         LASSERT(obd->obd_type->typ_name != NULL);
 576
 577        snprintf(name, MAX_STRING_SIZE, "../../%s/%s",
 578                 obd->obd_type->typ_name, obd->obd_name);
 579        osc_symlink = proc_symlink(obd->obd_type->typ_name, sbi->ll_proc_root,
 580                                   name);
 581        if (osc_symlink == NULL)
 582                err = -ENOMEM;
 583
 584
 585 out:
 586         if (err) {
 587                 if (svc_stats)
 588                         lprocfs_free_stats(svc_stats);
 589                 if (sbi->ll_proc_root)
 590                         lprocfs_remove(sbi->ll_proc_root);
 591         }
 592         RETURN(err);
 593 }
 594
 595 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
 596 {
 597         if (sbi->ll_proc_root) {
 598                 struct proc_dir_entry *file_stats =
 599                         lprocfs_srch(sbi->ll_proc_root, "stats");
 600
 601                 if (file_stats) {
 602                         lprocfs_free_stats(sbi->ll_stats);
 603                         lprocfs_remove(file_stats);
 604                 }
 605         }
 606 }
 607 #undef MAX_STRING_SIZE
 608
 609 static struct ll_async_page *llite_pglist_next_llap(struct ll_sb_info *sbi,
 610                                                     struct list_head *list)
 611 {
 612         struct ll_async_page *llap;
 613         struct list_head *pos;
 614
 615         list_for_each(pos, list) {
 616                 if (pos == &sbi->ll_pglist)
 617                         return NULL;
 618                 llap = list_entry(pos, struct ll_async_page, llap_proc_item);
 619                 if (llap->llap_page == NULL)
 620                         continue;
 621                 return llap;
 622         }
 623         LBUG();
 624         return NULL;
 625 }
 626
 627 #define seq_page_flag(seq, page, flag, has_flags) do {                  \
 628                 if (test_bit(PG_##flag, &(page)->flags)) {              \
 629                         if (!has_flags)                                 \
 630                                 has_flags = 1;                          \
 631                         else                                            \
 632                                 seq_putc(seq, '|');                     \
 633                         seq_puts(seq, #flag);                           \
 634                 }                                                       \
 635         } while(0);
 636
 637 static int llite_dump_pgcache_seq_show(struct seq_file *seq, void *v)
 638 {
 639         struct ll_async_page *llap, *dummy_llap = seq->private;
 640         struct ll_sb_info *sbi = dummy_llap->llap_cookie;
 641
 642         /* 2.4 doesn't seem to have SEQ_START_TOKEN, so we implement
 643          * it in our own state */
 644         if (dummy_llap->llap_magic == 0) {
 645                 seq_printf(seq, "generation | llap .cookie | page ");
 646                 seq_printf(seq, "inode .index [ page flags ]\n");
 647                 return 0;
 648         }
 649
 650         spin_lock(&sbi->ll_lock);
 651
 652         llap = llite_pglist_next_llap(sbi, &dummy_llap->llap_proc_item);
 653         if (llap != NULL)  {
 654                 int has_flags = 0;
 655                 struct page *page = llap->llap_page;
 656
 657                 seq_printf(seq, "%lu | %p %p | %p %p %lu [",
 658                                 sbi->ll_pglist_gen,
 659                                 llap, llap->llap_cookie,
 660                                 page, page->mapping->host, page->index);
 661                 seq_page_flag(seq, page, locked, has_flags);
 662                 seq_page_flag(seq, page, error, has_flags);
 663                 seq_page_flag(seq, page, referenced, has_flags);
 664                 seq_page_flag(seq, page, uptodate, has_flags);
 665                 seq_page_flag(seq, page, dirty, has_flags);
 666                 seq_page_flag(seq, page, highmem, has_flags);
 667                 if (!has_flags)
 668                         seq_puts(seq, "-]\n");
 669                 else
 670                         seq_puts(seq, "]\n");
 671         }
 672
 673         spin_unlock(&sbi->ll_lock);
 674
 675         return 0;
 676 }
 677
 678 static void *llite_dump_pgcache_seq_start(struct seq_file *seq, loff_t *pos)
 679 {
 680         struct ll_async_page *llap = seq->private;
 681
 682         if (llap->llap_magic == 2)
 683                 return NULL;
 684
 685         return (void *)1;
 686 }
 687
 688 static void *llite_dump_pgcache_seq_next(struct seq_file *seq, void *v,
 689                                          loff_t *pos)
 690 {
 691         struct ll_async_page *llap, *dummy_llap = seq->private;
 692         struct ll_sb_info *sbi = dummy_llap->llap_cookie;
 693
 694         /* bail if we just displayed the banner */
 695         if (dummy_llap->llap_magic == 0) {
 696                 dummy_llap->llap_magic = 1;
 697                 return dummy_llap;
 698         }
 699
 700         /* we've just displayed the llap that is after us in the list.
 701          * we advance to a position beyond it, returning null if there
 702          * isn't another llap in the list beyond that new position. */
 703         spin_lock(&sbi->ll_lock);
 704         llap = llite_pglist_next_llap(sbi, &dummy_llap->llap_proc_item);
 705         list_del_init(&dummy_llap->llap_proc_item);
 706         if (llap) {
 707                 list_add(&dummy_llap->llap_proc_item, &llap->llap_proc_item);
 708                 llap = llite_pglist_next_llap(sbi, &dummy_llap->llap_proc_item);
 709         }
 710         spin_unlock(&sbi->ll_lock);
 711
 712         ++*pos;
 713         if (llap == NULL) {
 714                 dummy_llap->llap_magic = 2;
 715                 return NULL;
 716         }
 717         return dummy_llap;
 718 }
 719
 720 static void llite_dump_pgcache_seq_stop(struct seq_file *seq, void *v)
 721 {
 722 }
 723
 724 struct seq_operations llite_dump_pgcache_seq_sops = {
 725         .start = llite_dump_pgcache_seq_start,
 726         .stop = llite_dump_pgcache_seq_stop,
 727         .next = llite_dump_pgcache_seq_next,
 728         .show = llite_dump_pgcache_seq_show,
 729 };
 730
 731 /* we're displaying llaps in a list_head list.  we don't want to hold a lock
 732  * while we walk the entire list, and we don't want to have to seek into
 733  * the right position in the list as an app advances with many syscalls.  we
 734  * allocate a dummy llap and hang it off file->private.  its position in
 735  * the list records where the app is currently displaying.  this way our
 736  * seq .start and .stop don't actually do anything.  .next returns null
 737  * when the dummy hits the end of the list which eventually leads to .release
 738  * where we tear down.  this kind of displaying is super-racey, so we put
 739  * a generation counter on the list so the output shows when the list
 740  * changes between reads.
 741  */
 742 static int llite_dump_pgcache_seq_open(struct inode *inode, struct file *file)
 743 {
 744         struct proc_dir_entry *dp = PDE(inode);
 745         struct ll_async_page *llap;
 746         struct seq_file *seq;
 747         struct ll_sb_info *sbi = dp->data;
 748         int rc;
 749
 750         OBD_ALLOC_GFP(llap, sizeof(*llap), GFP_KERNEL);
 751         if (llap == NULL)
 752                 return -ENOMEM;
 753         llap->llap_page = NULL;
 754         llap->llap_cookie = sbi;
 755         llap->llap_magic = 0;
 756
 757         rc = seq_open(file, &llite_dump_pgcache_seq_sops);
 758         if (rc) {
 759                 OBD_FREE(llap, sizeof(*llap));
 760                 return rc;
 761         }
 762         seq = file->private_data;
 763         seq->private = llap;
 764
 765         spin_lock(&sbi->ll_lock);
 766         list_add(&llap->llap_proc_item, &sbi->ll_pglist);
 767         spin_unlock(&sbi->ll_lock);
 768
 769         return 0;
 770 }
 771
 772 static int llite_dump_pgcache_seq_release(struct inode *inode,
 773                                           struct file *file)
 774 {
 775         struct seq_file *seq = file->private_data;
 776         struct ll_async_page *llap = seq->private;
 777         struct ll_sb_info *sbi = llap->llap_cookie;
 778
 779         spin_lock(&sbi->ll_lock);
 780         if (!list_empty(&llap->llap_proc_item))
 781                 list_del_init(&llap->llap_proc_item);
 782         spin_unlock(&sbi->ll_lock);
 783         OBD_FREE(llap, sizeof(*llap));
 784
 785         return seq_release(inode, file);
 786 }
 787
 788 struct file_operations llite_dump_pgcache_fops = {
 789         .owner   = THIS_MODULE,
 790         .open    = llite_dump_pgcache_seq_open,
 791         .read    = seq_read,
 792         .release = llite_dump_pgcache_seq_release,
 793 };
 794 static int ll_ra_stats_seq_show(struct seq_file *seq, void *v)
 795 {
 796         struct timeval now;
 797         struct ll_sb_info *sbi = seq->private;
 798         struct ll_ra_info *ra = &sbi->ll_ra_info;
 799         int i;
 800         static char *ra_stat_strings[] = {
 801                 [RA_STAT_HIT] = "hits",
 802                 [RA_STAT_MISS] = "misses",
 803                 [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 804                 [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 805                 [RA_STAT_FAILED_MATCH] = "failed lock match",
 806                 [RA_STAT_DISCARDED] = "read but discarded",
 807                 [RA_STAT_ZERO_LEN] = "zero length file",
 808                 [RA_STAT_ZERO_WINDOW] = "zero size window",
 809                 [RA_STAT_EOF] = "read-ahead to EOF",
 810                 [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 811         };
 812
 813         do_gettimeofday(&now);
 814
 815         spin_lock(&sbi->ll_lock);
 816
 817         seq_printf(seq, "snapshot_time:         %lu:%lu (secs:usecs)\n",
 818                    now.tv_sec, now.tv_usec);
 819         seq_printf(seq, "pending issued pages:           %lu\n",
 820                    ra->ra_cur_pages);
 821
 822         for(i = 0; i < _NR_RA_STAT; i++)
 823                 seq_printf(seq, "%-25s %lu\n", ra_stat_strings[i],
 824                            ra->ra_stats[i]);
 825
 826         spin_unlock(&sbi->ll_lock);
 827
 828         return 0;
 829 }
 830
 831 static void *ll_ra_stats_seq_start(struct seq_file *p, loff_t *pos)
 832 {
 833         if (*pos == 0)
 834                 return (void *)1;
 835         return NULL;
 836 }
 837 static void *ll_ra_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
 838 {
 839         ++*pos;
 840         return NULL;
 841 }
 842 static void ll_ra_stats_seq_stop(struct seq_file *p, void *v)
 843 {
 844 }
 845 struct seq_operations ll_ra_stats_seq_sops = {
 846         .start = ll_ra_stats_seq_start,
 847         .stop = ll_ra_stats_seq_stop,
 848         .next = ll_ra_stats_seq_next,
 849         .show = ll_ra_stats_seq_show,
 850 };
 851
 852 static int ll_ra_stats_seq_open(struct inode *inode, struct file *file)
 853 {
 854         struct proc_dir_entry *dp = PDE(inode);
 855         struct seq_file *seq;
 856         int rc;
 857
 858         rc = seq_open(file, &ll_ra_stats_seq_sops);
 859         if (rc)
 860                 return rc;
 861         seq = file->private_data;
 862         seq->private = dp->data;
 863         return 0;
 864 }
 865
 866 static ssize_t ll_ra_stats_seq_write(struct file *file, const char *buf,
 867                                        size_t len, loff_t *off)
 868 {
 869         struct seq_file *seq = file->private_data;
 870         struct ll_sb_info *sbi = seq->private;
 871         struct ll_ra_info *ra = &sbi->ll_ra_info;
 872
 873         spin_lock(&sbi->ll_lock);
 874         memset(ra->ra_stats, 0, sizeof(ra->ra_stats));
 875         spin_unlock(&sbi->ll_lock);
 876
 877         return len;
 878 }
 879
 880 struct file_operations ll_ra_stats_fops = {
 881         .owner   = THIS_MODULE,
 882         .open    = ll_ra_stats_seq_open,
 883         .read    = seq_read,
 884         .write   = ll_ra_stats_seq_write,
 885         .llseek  = seq_lseek,
 886         .release = seq_release,
 887 };
 888
 889 #define PRINTF_STIME(stime) (unsigned long)(stime)->st_num,     \
 890         lprocfs_stime_avg_ms(stime), lprocfs_stime_avg_us(stime)
 891
 892 static int llite_wait_times_seq_show(struct seq_file *seq, void *v)
 893 {
 894         struct ll_sb_info *sbi = seq->private;
 895         struct timeval now;
 896
 897         do_gettimeofday(&now);
 898
 899         spin_lock(&sbi->ll_lock);
 900
 901         seq_printf(seq, "snapshot_time:         %lu:%lu (secs:usecs)\n\n",
 902                    now.tv_sec, now.tv_usec);
 903
 904         seq_printf(seq, "lock wait times: (num, average ms)\n");
 905         seq_printf(seq, "\tread\t%lu\t%lu.%04lu\n",
 906                         PRINTF_STIME(&sbi->ll_read_stime));
 907         seq_printf(seq, "\twrite\t%lu\t%lu.%04lu\n",
 908                         PRINTF_STIME(&sbi->ll_write_stime));
 909         seq_printf(seq, "\tgroup\t%lu\t%lu.%04lu\n",
 910                         PRINTF_STIME(&sbi->ll_grouplock_stime));
 911         seq_printf(seq, "\tseek\t%lu\t%lu.%04lu\n",
 912                         PRINTF_STIME(&sbi->ll_seek_stime));
 913         seq_printf(seq, "\tsetattr\t%lu\t%lu.%04lu\n\n",
 914                         PRINTF_STIME(&sbi->ll_setattr_stime));
 915
 916         seq_printf(seq, "io path wait times: (num, average ms)\n");
 917         seq_printf(seq, "\tll_brw\t%lu\t%lu.%04lu\n",
 918                         PRINTF_STIME(&sbi->ll_brw_stime));
 919 #if 0
 920         seq_printf(seq, "\tdone\t%lu\t%lu.%04lu\n",
 921                         PRINTF_STIME(&sbi->ll_done_stime));
 922 #endif
 923
 924         spin_unlock(&sbi->ll_lock);
 925
 926         return 0;
 927 }
 928 #undef pct
 929
 930 static void *llite_wait_times_seq_start(struct seq_file *p, loff_t *pos)
 931 {
 932         if (*pos == 0)
 933                 return (void *)1;
 934         return NULL;
 935 }
 936 static void *llite_wait_times_seq_next(struct seq_file *p, void *v, loff_t *pos)
 937 {
 938         ++*pos;
 939         return NULL;
 940 }
 941 static void llite_wait_times_seq_stop(struct seq_file *p, void *v)
 942 {
 943 }
 944 struct seq_operations llite_wait_times_seq_sops = {
 945         .start = llite_wait_times_seq_start,
 946         .stop = llite_wait_times_seq_stop,
 947         .next = llite_wait_times_seq_next,
 948         .show = llite_wait_times_seq_show,
 949 };
 950
 951 static int llite_wait_times_seq_open(struct inode *inode, struct file *file)
 952 {
 953         struct proc_dir_entry *dp = PDE(inode);
 954         struct seq_file *seq;
 955         int rc;
 956
 957         rc = seq_open(file, &llite_wait_times_seq_sops);
 958         if (rc)
 959                 return rc;
 960         seq = file->private_data;
 961         seq->private = dp->data;
 962         return 0;
 963 }
 964
 965 static ssize_t llite_wait_times_seq_write(struct file *file, const char *buf,
 966                                        size_t len, loff_t *off)
 967 {
 968         struct seq_file *seq = file->private_data;
 969         struct ll_sb_info *sbi = seq->private;
 970
 971         spin_lock(&sbi->ll_lock);
 972         memset(&sbi->ll_read_stime, 0, sizeof(sbi->ll_read_stime));
 973         memset(&sbi->ll_write_stime, 0, sizeof(sbi->ll_write_stime));
 974         memset(&sbi->ll_grouplock_stime, 0, sizeof(sbi->ll_grouplock_stime));
 975         memset(&sbi->ll_seek_stime, 0, sizeof(sbi->ll_seek_stime));
 976         memset(&sbi->ll_setattr_stime, 0, sizeof(sbi->ll_setattr_stime));
 977         memset(&sbi->ll_brw_stime, 0, sizeof(sbi->ll_brw_stime));
 978 //        memset(&sbi->ll_done_stime, 0, sizeof(sbi->ll_done_stime));
 979         spin_unlock(&sbi->ll_lock);
 980
 981         return len;
 982 }
 983
 984 struct file_operations llite_wait_times_fops = {
 985         .owner   = THIS_MODULE,
 986         .open    = llite_wait_times_seq_open,
 987         .read    = seq_read,
 988         .write   = llite_wait_times_seq_write,
 989         .llseek  = seq_lseek,
 990         .release = seq_release,
 991 };
 992
 993 #endif /* LPROCFS */