fs/reiserfs/procfs.c

   1 /* -*- linux-c -*- */
   2
   3 /* fs/reiserfs/procfs.c */
   4
   5 /*
   6  * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
   7  */
   8
   9 /* proc info support a la one created by Sizif@Botik.RU for PGC */
  10
  11 #include <linux/module.h>
  12 #include <linux/time.h>
  13 #include <linux/seq_file.h>
  14 #include <asm/uaccess.h>
  15 #include "reiserfs.h"
  16 #include <linux/init.h>
  17 #include <linux/proc_fs.h>
  18
  19 /*
  20  * LOCKING:
  21  *
  22  * We rely on new Alexander Viro's super-block locking.
  23  *
  24  */
  25
  26 static int show_version(struct seq_file *m, struct super_block *sb)
  27 {
  28         char *format;
  29
  30         if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_6)) {
  31                 format = "3.6";
  32         } else if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_5)) {
  33                 format = "3.5";
  34         } else {
  35                 format = "unknown";
  36         }
  37
  38         seq_printf(m, "%s format\twith checks %s\n", format,
  39 #if defined( CONFIG_REISERFS_CHECK )
  40                    "on"
  41 #else
  42                    "off"
  43 #endif
  44             );
  45         return 0;
  46 }
  47
  48 #define SF( x ) ( r -> x )
  49 #define SFP( x ) SF( s_proc_info_data.x )
  50 #define SFPL( x ) SFP( x[ level ] )
  51 #define SFPF( x ) SFP( scan_bitmap.x )
  52 #define SFPJ( x ) SFP( journal.x )
  53
  54 #define D2C( x ) le16_to_cpu( x )
  55 #define D4C( x ) le32_to_cpu( x )
  56 #define DF( x ) D2C( rs -> s_v1.x )
  57 #define DFL( x ) D4C( rs -> s_v1.x )
  58
  59 #define objectid_map( s, rs ) (old_format_only (s) ?                            \
  60                          (__le32 *)((struct reiserfs_super_block_v1 *)rs + 1) : \
  61                          (__le32 *)(rs + 1))
  62 #define MAP( i ) D4C( objectid_map( sb, rs )[ i ] )
  63
  64 #define DJF( x ) le32_to_cpu( rs -> x )
  65 #define DJV( x ) le32_to_cpu( s_v1 -> x )
  66 #define DJP( x ) le32_to_cpu( jp -> x )
  67 #define JF( x ) ( r -> s_journal -> x )
  68
  69 static int show_super(struct seq_file *m, struct super_block *sb)
  70 {
  71         struct reiserfs_sb_info *r = REISERFS_SB(sb);
  72
  73         seq_printf(m, "state: \t%s\n"
  74                    "mount options: \t%s%s%s%s%s%s%s%s%s%s%s\n"
  75                    "gen. counter: \t%i\n"
  76                    "s_disk_reads: \t%i\n"
  77                    "s_disk_writes: \t%i\n"
  78                    "s_fix_nodes: \t%i\n"
  79                    "s_do_balance: \t%i\n"
  80                    "s_unneeded_left_neighbor: \t%i\n"
  81                    "s_good_search_by_key_reada: \t%i\n"
  82                    "s_bmaps: \t%i\n"
  83                    "s_bmaps_without_search: \t%i\n"
  84                    "s_direct2indirect: \t%i\n"
  85                    "s_indirect2direct: \t%i\n"
  86                    "\n"
  87                    "max_hash_collisions: \t%i\n"
  88                    "breads: \t%lu\n"
  89                    "bread_misses: \t%lu\n"
  90                    "search_by_key: \t%lu\n"
  91                    "search_by_key_fs_changed: \t%lu\n"
  92                    "search_by_key_restarted: \t%lu\n"
  93                    "insert_item_restarted: \t%lu\n"
  94                    "paste_into_item_restarted: \t%lu\n"
  95                    "cut_from_item_restarted: \t%lu\n"
  96                    "delete_solid_item_restarted: \t%lu\n"
  97                    "delete_item_restarted: \t%lu\n"
  98                    "leaked_oid: \t%lu\n"
  99                    "leaves_removable: \t%lu\n",
 100                    SF(s_mount_state) == REISERFS_VALID_FS ?
 101                    "REISERFS_VALID_FS" : "REISERFS_ERROR_FS",
 102                    reiserfs_r5_hash(sb) ? "FORCE_R5 " : "",
 103                    reiserfs_rupasov_hash(sb) ? "FORCE_RUPASOV " : "",
 104                    reiserfs_tea_hash(sb) ? "FORCE_TEA " : "",
 105                    reiserfs_hash_detect(sb) ? "DETECT_HASH " : "",
 106                    reiserfs_no_border(sb) ? "NO_BORDER " : "BORDER ",
 107                    reiserfs_no_unhashed_relocation(sb) ?
 108                    "NO_UNHASHED_RELOCATION " : "",
 109                    reiserfs_hashed_relocation(sb) ? "UNHASHED_RELOCATION " : "",
 110                    reiserfs_test4(sb) ? "TEST4 " : "",
 111                    have_large_tails(sb) ? "TAILS " : have_small_tails(sb) ?
 112                    "SMALL_TAILS " : "NO_TAILS ",
 113                    replay_only(sb) ? "REPLAY_ONLY " : "",
 114                    convert_reiserfs(sb) ? "CONV " : "",
 115                    atomic_read(&r->s_generation_counter),
 116                    SF(s_disk_reads), SF(s_disk_writes), SF(s_fix_nodes),
 117                    SF(s_do_balance), SF(s_unneeded_left_neighbor),
 118                    SF(s_good_search_by_key_reada), SF(s_bmaps),
 119                    SF(s_bmaps_without_search), SF(s_direct2indirect),
 120                    SF(s_indirect2direct), SFP(max_hash_collisions), SFP(breads),
 121                    SFP(bread_miss), SFP(search_by_key),
 122                    SFP(search_by_key_fs_changed), SFP(search_by_key_restarted),
 123                    SFP(insert_item_restarted), SFP(paste_into_item_restarted),
 124                    SFP(cut_from_item_restarted),
 125                    SFP(delete_solid_item_restarted), SFP(delete_item_restarted),
 126                    SFP(leaked_oid), SFP(leaves_removable));
 127
 128         return 0;
 129 }
 130
 131 static int show_per_level(struct seq_file *m, struct super_block *sb)
 132 {
 133         struct reiserfs_sb_info *r = REISERFS_SB(sb);
 134         int level;
 135
 136         seq_printf(m, "level\t"
 137                    "     balances"
 138                    " [sbk:  reads"
 139                    "   fs_changed"
 140                    "   restarted]"
 141                    "   free space"
 142                    "        items"
 143                    "   can_remove"
 144                    "         lnum"
 145                    "         rnum"
 146                    "       lbytes"
 147                    "       rbytes"
 148                    "     get_neig"
 149                    " get_neig_res" "  need_l_neig" "  need_r_neig" "\n");
 150
 151         for (level = 0; level < MAX_HEIGHT; ++level) {
 152                 seq_printf(m, "%i\t"
 153                            " %12lu"
 154                            " %12lu"
 155                            " %12lu"
 156                            " %12lu"
 157                            " %12lu"
 158                            " %12lu"
 159                            " %12lu"
 160                            " %12li"
 161                            " %12li"
 162                            " %12li"
 163                            " %12li"
 164                            " %12lu"
 165                            " %12lu"
 166                            " %12lu"
 167                            " %12lu"
 168                            "\n",
 169                            level,
 170                            SFPL(balance_at),
 171                            SFPL(sbk_read_at),
 172                            SFPL(sbk_fs_changed),
 173                            SFPL(sbk_restarted),
 174                            SFPL(free_at),
 175                            SFPL(items_at),
 176                            SFPL(can_node_be_removed),
 177                            SFPL(lnum),
 178                            SFPL(rnum),
 179                            SFPL(lbytes),
 180                            SFPL(rbytes),
 181                            SFPL(get_neighbors),
 182                            SFPL(get_neighbors_restart),
 183                            SFPL(need_l_neighbor), SFPL(need_r_neighbor)
 184                     );
 185         }
 186         return 0;
 187 }
 188
 189 static int show_bitmap(struct seq_file *m, struct super_block *sb)
 190 {
 191         struct reiserfs_sb_info *r = REISERFS_SB(sb);
 192
 193         seq_printf(m, "free_block: %lu\n"
 194                    "  scan_bitmap:"
 195                    "          wait"
 196                    "          bmap"
 197                    "         retry"
 198                    "        stolen"
 199                    "  journal_hint"
 200                    "journal_nohint"
 201                    "\n"
 202                    " %14lu"
 203                    " %14lu"
 204                    " %14lu"
 205                    " %14lu"
 206                    " %14lu"
 207                    " %14lu"
 208                    " %14lu"
 209                    "\n",
 210                    SFP(free_block),
 211                    SFPF(call),
 212                    SFPF(wait),
 213                    SFPF(bmap),
 214                    SFPF(retry),
 215                    SFPF(stolen),
 216                    SFPF(in_journal_hint), SFPF(in_journal_nohint));
 217
 218         return 0;
 219 }
 220
 221 static int show_on_disk_super(struct seq_file *m, struct super_block *sb)
 222 {
 223         struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
 224         struct reiserfs_super_block *rs = sb_info->s_rs;
 225         int hash_code = DFL(s_hash_function_code);
 226         __u32 flags = DJF(s_flags);
 227
 228         seq_printf(m, "block_count: \t%i\n"
 229                    "free_blocks: \t%i\n"
 230                    "root_block: \t%i\n"
 231                    "blocksize: \t%i\n"
 232                    "oid_maxsize: \t%i\n"
 233                    "oid_cursize: \t%i\n"
 234                    "umount_state: \t%i\n"
 235                    "magic: \t%10.10s\n"
 236                    "fs_state: \t%i\n"
 237                    "hash: \t%s\n"
 238                    "tree_height: \t%i\n"
 239                    "bmap_nr: \t%i\n"
 240                    "version: \t%i\n"
 241                    "flags: \t%x[%s]\n"
 242                    "reserved_for_journal: \t%i\n",
 243                    DFL(s_block_count),
 244                    DFL(s_free_blocks),
 245                    DFL(s_root_block),
 246                    DF(s_blocksize),
 247                    DF(s_oid_maxsize),
 248                    DF(s_oid_cursize),
 249                    DF(s_umount_state),
 250                    rs->s_v1.s_magic,
 251                    DF(s_fs_state),
 252                    hash_code == TEA_HASH ? "tea" :
 253                    (hash_code == YURA_HASH) ? "rupasov" :
 254                    (hash_code == R5_HASH) ? "r5" :
 255                    (hash_code == UNSET_HASH) ? "unset" : "unknown",
 256                    DF(s_tree_height),
 257                    DF(s_bmap_nr),
 258                    DF(s_version), flags, (flags & reiserfs_attrs_cleared)
 259                    ? "attrs_cleared" : "", DF(s_reserved_for_journal));
 260
 261         return 0;
 262 }
 263
 264 static int show_oidmap(struct seq_file *m, struct super_block *sb)
 265 {
 266         struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
 267         struct reiserfs_super_block *rs = sb_info->s_rs;
 268         unsigned int mapsize = le16_to_cpu(rs->s_v1.s_oid_cursize);
 269         unsigned long total_used = 0;
 270         int i;
 271
 272         for (i = 0; i < mapsize; ++i) {
 273                 __u32 right;
 274
 275                 right = (i == mapsize - 1) ? MAX_KEY_OBJECTID : MAP(i + 1);
 276                 seq_printf(m, "%s: [ %x .. %x )\n",
 277                            (i & 1) ? "free" : "used", MAP(i), right);
 278                 if (!(i & 1)) {
 279                         total_used += right - MAP(i);
 280                 }
 281         }
 282 #if defined( REISERFS_USE_OIDMAPF )
 283         if (sb_info->oidmap.use_file && (sb_info->oidmap.mapf != NULL)) {
 284                 loff_t size = file_inode(sb_info->oidmap.mapf)->i_size;
 285                 total_used += size / sizeof(reiserfs_oidinterval_d_t);
 286         }
 287 #endif
 288         seq_printf(m, "total: \t%i [%i/%i] used: %lu [exact]\n",
 289                    mapsize,
 290                    mapsize, le16_to_cpu(rs->s_v1.s_oid_maxsize), total_used);
 291         return 0;
 292 }
 293
 294 static int show_journal(struct seq_file *m, struct super_block *sb)
 295 {
 296         struct reiserfs_sb_info *r = REISERFS_SB(sb);
 297         struct reiserfs_super_block *rs = r->s_rs;
 298         struct journal_params *jp = &rs->s_v1.s_journal;
 299         char b[BDEVNAME_SIZE];
 300
 301         seq_printf(m,           /* on-disk fields */
 302                    "jp_journal_1st_block: \t%i\n"
 303                    "jp_journal_dev: \t%s[%x]\n"
 304                    "jp_journal_size: \t%i\n"
 305                    "jp_journal_trans_max: \t%i\n"
 306                    "jp_journal_magic: \t%i\n"
 307                    "jp_journal_max_batch: \t%i\n"
 308                    "jp_journal_max_commit_age: \t%i\n"
 309                    "jp_journal_max_trans_age: \t%i\n"
 310                    /* incore fields */
 311                    "j_1st_reserved_block: \t%i\n"
 312                    "j_state: \t%li\n"
 313                    "j_trans_id: \t%u\n"
 314                    "j_mount_id: \t%lu\n"
 315                    "j_start: \t%lu\n"
 316                    "j_len: \t%lu\n"
 317                    "j_len_alloc: \t%lu\n"
 318                    "j_wcount: \t%i\n"
 319                    "j_bcount: \t%lu\n"
 320                    "j_first_unflushed_offset: \t%lu\n"
 321                    "j_last_flush_trans_id: \t%u\n"
 322                    "j_trans_start_time: \t%li\n"
 323                    "j_list_bitmap_index: \t%i\n"
 324                    "j_must_wait: \t%i\n"
 325                    "j_next_full_flush: \t%i\n"
 326                    "j_next_async_flush: \t%i\n"
 327                    "j_cnode_used: \t%i\n" "j_cnode_free: \t%i\n" "\n"
 328                    /* reiserfs_proc_info_data_t.journal fields */
 329                    "in_journal: \t%12lu\n"
 330                    "in_journal_bitmap: \t%12lu\n"
 331                    "in_journal_reusable: \t%12lu\n"
 332                    "lock_journal: \t%12lu\n"
 333                    "lock_journal_wait: \t%12lu\n"
 334                    "journal_begin: \t%12lu\n"
 335                    "journal_relock_writers: \t%12lu\n"
 336                    "journal_relock_wcount: \t%12lu\n"
 337                    "mark_dirty: \t%12lu\n"
 338                    "mark_dirty_already: \t%12lu\n"
 339                    "mark_dirty_notjournal: \t%12lu\n"
 340                    "restore_prepared: \t%12lu\n"
 341                    "prepare: \t%12lu\n"
 342                    "prepare_retry: \t%12lu\n",
 343                    DJP(jp_journal_1st_block),
 344                    bdevname(SB_JOURNAL(sb)->j_dev_bd, b),
 345                    DJP(jp_journal_dev),
 346                    DJP(jp_journal_size),
 347                    DJP(jp_journal_trans_max),
 348                    DJP(jp_journal_magic),
 349                    DJP(jp_journal_max_batch),
 350                    SB_JOURNAL(sb)->j_max_commit_age,
 351                    DJP(jp_journal_max_trans_age),
 352                    JF(j_1st_reserved_block),
 353                    JF(j_state),
 354                    JF(j_trans_id),
 355                    JF(j_mount_id),
 356                    JF(j_start),
 357                    JF(j_len),
 358                    JF(j_len_alloc),
 359                    atomic_read(&r->s_journal->j_wcount),
 360                    JF(j_bcount),
 361                    JF(j_first_unflushed_offset),
 362                    JF(j_last_flush_trans_id),
 363                    JF(j_trans_start_time),
 364                    JF(j_list_bitmap_index),
 365                    JF(j_must_wait),
 366                    JF(j_next_full_flush),
 367                    JF(j_next_async_flush),
 368                    JF(j_cnode_used),
 369                    JF(j_cnode_free),
 370                    SFPJ(in_journal),
 371                    SFPJ(in_journal_bitmap),
 372                    SFPJ(in_journal_reusable),
 373                    SFPJ(lock_journal),
 374                    SFPJ(lock_journal_wait),
 375                    SFPJ(journal_being),
 376                    SFPJ(journal_relock_writers),
 377                    SFPJ(journal_relock_wcount),
 378                    SFPJ(mark_dirty),
 379                    SFPJ(mark_dirty_already),
 380                    SFPJ(mark_dirty_notjournal),
 381                    SFPJ(restore_prepared), SFPJ(prepare), SFPJ(prepare_retry)
 382             );
 383         return 0;
 384 }
 385
 386 /* iterator */
 387 static int test_sb(struct super_block *sb, void *data)
 388 {
 389         return data == sb;
 390 }
 391
 392 static int set_sb(struct super_block *sb, void *data)
 393 {
 394         return -ENOENT;
 395 }
 396
 397 struct reiserfs_seq_private {
 398         struct super_block *sb;
 399         int (*show) (struct seq_file *, struct super_block *);
 400 };
 401
 402 static void *r_start(struct seq_file *m, loff_t * pos)
 403 {
 404         struct reiserfs_seq_private *priv = m->private;
 405         loff_t l = *pos;
 406
 407         if (l)
 408                 return NULL;
 409
 410         if (IS_ERR(sget(&reiserfs_fs_type, test_sb, set_sb, 0, priv->sb)))
 411                 return NULL;
 412
 413         up_write(&priv->sb->s_umount);
 414         return priv->sb;
 415 }
 416
 417 static void *r_next(struct seq_file *m, void *v, loff_t * pos)
 418 {
 419         ++*pos;
 420         if (v)
 421                 deactivate_super(v);
 422         return NULL;
 423 }
 424
 425 static void r_stop(struct seq_file *m, void *v)
 426 {
 427         if (v)
 428                 deactivate_super(v);
 429 }
 430
 431 static int r_show(struct seq_file *m, void *v)
 432 {
 433         struct reiserfs_seq_private *priv = m->private;
 434         return priv->show(m, v);
 435 }
 436
 437 static const struct seq_operations r_ops = {
 438         .start = r_start,
 439         .next = r_next,
 440         .stop = r_stop,
 441         .show = r_show,
 442 };
 443
 444 static int r_open(struct inode *inode, struct file *file)
 445 {
 446         struct reiserfs_seq_private *priv;
 447         int ret = seq_open_private(file, &r_ops,
 448                                    sizeof(struct reiserfs_seq_private));
 449
 450         if (!ret) {
 451                 struct seq_file *m = file->private_data;
 452                 priv = m->private;
 453                 priv->sb = proc_get_parent_data(inode);
 454                 priv->show = PDE_DATA(inode);
 455         }
 456         return ret;
 457 }
 458
 459 static const struct file_operations r_file_operations = {
 460         .open = r_open,
 461         .read = seq_read,
 462         .llseek = seq_lseek,
 463         .release = seq_release_private,
 464         .owner = THIS_MODULE,
 465 };
 466
 467 static struct proc_dir_entry *proc_info_root = NULL;
 468 static const char proc_info_root_name[] = "fs/reiserfs";
 469
 470 static void add_file(struct super_block *sb, char *name,
 471                      int (*func) (struct seq_file *, struct super_block *))
 472 {
 473         proc_create_data(name, 0, REISERFS_SB(sb)->procdir,
 474                          &r_file_operations, func);
 475 }
 476
 477 int reiserfs_proc_info_init(struct super_block *sb)
 478 {
 479         char b[BDEVNAME_SIZE];
 480         char *s;
 481
 482         /* Some block devices use /'s */
 483         strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
 484         s = strchr(b, '/');
 485         if (s)
 486                 *s = '!';
 487
 488         spin_lock_init(&__PINFO(sb).lock);
 489         REISERFS_SB(sb)->procdir = proc_mkdir_data(b, 0, proc_info_root, sb);
 490         if (REISERFS_SB(sb)->procdir) {
 491                 add_file(sb, "version", show_version);
 492                 add_file(sb, "super", show_super);
 493                 add_file(sb, "per-level", show_per_level);
 494                 add_file(sb, "bitmap", show_bitmap);
 495                 add_file(sb, "on-disk-super", show_on_disk_super);
 496                 add_file(sb, "oidmap", show_oidmap);
 497                 add_file(sb, "journal", show_journal);
 498                 return 0;
 499         }
 500         reiserfs_warning(sb, "cannot create /proc/%s/%s",
 501                          proc_info_root_name, b);
 502         return 1;
 503 }
 504
 505 int reiserfs_proc_info_done(struct super_block *sb)
 506 {
 507         struct proc_dir_entry *de = REISERFS_SB(sb)->procdir;
 508         if (de) {
 509                 char b[BDEVNAME_SIZE];
 510                 char *s;
 511
 512                 /* Some block devices use /'s */
 513                 strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
 514                 s = strchr(b, '/');
 515                 if (s)
 516                         *s = '!';
 517
 518                 remove_proc_subtree(b, proc_info_root);
 519                 REISERFS_SB(sb)->procdir = NULL;
 520         }
 521         return 0;
 522 }
 523
 524 int reiserfs_proc_info_global_init(void)
 525 {
 526         if (proc_info_root == NULL) {
 527                 proc_info_root = proc_mkdir(proc_info_root_name, NULL);
 528                 if (!proc_info_root) {
 529                         reiserfs_warning(NULL, "cannot create /proc/%s",
 530                                          proc_info_root_name);
 531                         return 1;
 532                 }
 533         }
 534         return 0;
 535 }
 536
 537 int reiserfs_proc_info_global_done(void)
 538 {
 539         if (proc_info_root != NULL) {
 540                 proc_info_root = NULL;
 541                 remove_proc_entry(proc_info_root_name, NULL);
 542         }
 543         return 0;
 544 }
 545 /*
 546  * Revision 1.1.8.2  2001/07/15 17:08:42  god
 547  *  . use get_super() in procfs.c
 548  *  . remove remove_save_link() from reiserfs_do_truncate()
 549  *
 550  * I accept terms and conditions stated in the Legal Agreement
 551  * (available at http://www.namesys.com/legalese.html)
 552  *
 553  * Revision 1.1.8.1  2001/07/11 16:48:50  god
 554  * proc info support
 555  *
 556  * I accept terms and conditions stated in the Legal Agreement
 557  * (available at http://www.namesys.com/legalese.html)
 558  *
 559  */
 560
 561 /*
 562  * Make Linus happy.
 563  * Local variables:
 564  * c-indentation-style: "K&R"
 565  * mode-name: "LC"
 566  * c-basic-offset: 8
 567  * tab-width: 8
 568  * End:
 569  */