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 <linux/reiserfs_fs.h>
  16 #include <linux/reiserfs_fs_sb.h>
  17 #include <linux/init.h>
  18 #include <linux/proc_fs.h>
  19
  20 /*
  21  * LOCKING:
  22  *
  23  * We rely on new Alexander Viro's super-block locking.
  24  *
  25  */
  26
  27 static int show_version(struct seq_file *m, struct super_block *sb)
  28 {
  29         char *format;
  30
  31         if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_6)) {
  32                 format = "3.6";
  33         } else if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_5)) {
  34                 format = "3.5";
  35         } else {
  36                 format = "unknown";
  37         }
  38
  39         seq_printf(m, "%s format\twith checks %s\n", format,
  40 #if defined( CONFIG_REISERFS_CHECK )
  41                    "on"
  42 #else
  43                    "off"
  44 #endif
  45             );
  46         return 0;
  47 }
  48
  49 #define SF( x ) ( r -> x )
  50 #define SFP( x ) SF( s_proc_info_data.x )
  51 #define SFPL( x ) SFP( x[ level ] )
  52 #define SFPF( x ) SFP( scan_bitmap.x )
  53 #define SFPJ( x ) SFP( journal.x )
  54
  55 #define D2C( x ) le16_to_cpu( x )
  56 #define D4C( x ) le32_to_cpu( x )
  57 #define DF( x ) D2C( rs -> s_v1.x )
  58 #define DFL( x ) D4C( rs -> s_v1.x )
  59
  60 #define objectid_map( s, rs ) (old_format_only (s) ?                            \
  61                          (__le32 *)((struct reiserfs_super_block_v1 *)rs + 1) : \
  62                          (__le32 *)(rs + 1))
  63 #define MAP( i ) D4C( objectid_map( sb, rs )[ i ] )
  64
  65 #define DJF( x ) le32_to_cpu( rs -> x )
  66 #define DJV( x ) le32_to_cpu( s_v1 -> x )
  67 #define DJP( x ) le32_to_cpu( jp -> x )
  68 #define JF( x ) ( r -> s_journal -> x )
  69
  70 static int show_super(struct seq_file *m, struct super_block *sb)
  71 {
  72         struct reiserfs_sb_info *r = REISERFS_SB(sb);
  73
  74         seq_printf(m, "state: \t%s\n"
  75                    "mount options: \t%s%s%s%s%s%s%s%s%s%s%s\n"
  76                    "gen. counter: \t%i\n"
  77                    "s_disk_reads: \t%i\n"
  78                    "s_disk_writes: \t%i\n"
  79                    "s_fix_nodes: \t%i\n"
  80                    "s_do_balance: \t%i\n"
  81                    "s_unneeded_left_neighbor: \t%i\n"
  82                    "s_good_search_by_key_reada: \t%i\n"
  83                    "s_bmaps: \t%i\n"
  84                    "s_bmaps_without_search: \t%i\n"
  85                    "s_direct2indirect: \t%i\n"
  86                    "s_indirect2direct: \t%i\n"
  87                    "\n"
  88                    "max_hash_collisions: \t%i\n"
  89                    "breads: \t%lu\n"
  90                    "bread_misses: \t%lu\n"
  91                    "search_by_key: \t%lu\n"
  92                    "search_by_key_fs_changed: \t%lu\n"
  93                    "search_by_key_restarted: \t%lu\n"
  94                    "insert_item_restarted: \t%lu\n"
  95                    "paste_into_item_restarted: \t%lu\n"
  96                    "cut_from_item_restarted: \t%lu\n"
  97                    "delete_solid_item_restarted: \t%lu\n"
  98                    "delete_item_restarted: \t%lu\n"
  99                    "leaked_oid: \t%lu\n"
 100                    "leaves_removable: \t%lu\n",
 101                    SF(s_mount_state) == REISERFS_VALID_FS ?
 102                    "REISERFS_VALID_FS" : "REISERFS_ERROR_FS",
 103                    reiserfs_r5_hash(sb) ? "FORCE_R5 " : "",
 104                    reiserfs_rupasov_hash(sb) ? "FORCE_RUPASOV " : "",
 105                    reiserfs_tea_hash(sb) ? "FORCE_TEA " : "",
 106                    reiserfs_hash_detect(sb) ? "DETECT_HASH " : "",
 107                    reiserfs_no_border(sb) ? "NO_BORDER " : "BORDER ",
 108                    reiserfs_no_unhashed_relocation(sb) ?
 109                    "NO_UNHASHED_RELOCATION " : "",
 110                    reiserfs_hashed_relocation(sb) ? "UNHASHED_RELOCATION " : "",
 111                    reiserfs_test4(sb) ? "TEST4 " : "",
 112                    have_large_tails(sb) ? "TAILS " : have_small_tails(sb) ?
 113                    "SMALL_TAILS " : "NO_TAILS ",
 114                    replay_only(sb) ? "REPLAY_ONLY " : "",
 115                    convert_reiserfs(sb) ? "CONV " : "",
 116                    atomic_read(&r->s_generation_counter),
 117                    SF(s_disk_reads), SF(s_disk_writes), SF(s_fix_nodes),
 118                    SF(s_do_balance), SF(s_unneeded_left_neighbor),
 119                    SF(s_good_search_by_key_reada), SF(s_bmaps),
 120                    SF(s_bmaps_without_search), SF(s_direct2indirect),
 121                    SF(s_indirect2direct), SFP(max_hash_collisions), SFP(breads),
 122                    SFP(bread_miss), SFP(search_by_key),
 123                    SFP(search_by_key_fs_changed), SFP(search_by_key_restarted),
 124                    SFP(insert_item_restarted), SFP(paste_into_item_restarted),
 125                    SFP(cut_from_item_restarted),
 126                    SFP(delete_solid_item_restarted), SFP(delete_item_restarted),
 127                    SFP(leaked_oid), SFP(leaves_removable));
 128
 129         return 0;
 130 }
 131
 132 static int show_per_level(struct seq_file *m, struct super_block *sb)
 133 {
 134         struct reiserfs_sb_info *r = REISERFS_SB(sb);
 135         int level;
 136
 137         seq_printf(m, "level\t"
 138                    "     balances"
 139                    " [sbk:  reads"
 140                    "   fs_changed"
 141                    "   restarted]"
 142                    "   free space"
 143                    "        items"
 144                    "   can_remove"
 145                    "         lnum"
 146                    "         rnum"
 147                    "       lbytes"
 148                    "       rbytes"
 149                    "     get_neig"
 150                    " get_neig_res" "  need_l_neig" "  need_r_neig" "\n");
 151
 152         for (level = 0; level < MAX_HEIGHT; ++level) {
 153                 seq_printf(m, "%i\t"
 154                            " %12lu"
 155                            " %12lu"
 156                            " %12lu"
 157                            " %12lu"
 158                            " %12lu"
 159                            " %12lu"
 160                            " %12lu"
 161                            " %12li"
 162                            " %12li"
 163                            " %12li"
 164                            " %12li"
 165                            " %12lu"
 166                            " %12lu"
 167                            " %12lu"
 168                            " %12lu"
 169                            "\n",
 170                            level,
 171                            SFPL(balance_at),
 172                            SFPL(sbk_read_at),
 173                            SFPL(sbk_fs_changed),
 174                            SFPL(sbk_restarted),
 175                            SFPL(free_at),
 176                            SFPL(items_at),
 177                            SFPL(can_node_be_removed),
 178                            SFPL(lnum),
 179                            SFPL(rnum),
 180                            SFPL(lbytes),
 181                            SFPL(rbytes),
 182                            SFPL(get_neighbors),
 183                            SFPL(get_neighbors_restart),
 184                            SFPL(need_l_neighbor), SFPL(need_r_neighbor)
 185                     );
 186         }
 187         return 0;
 188 }
 189
 190 static int show_bitmap(struct seq_file *m, struct super_block *sb)
 191 {
 192         struct reiserfs_sb_info *r = REISERFS_SB(sb);
 193
 194         seq_printf(m, "free_block: %lu\n"
 195                    "  scan_bitmap:"
 196                    "          wait"
 197                    "          bmap"
 198                    "         retry"
 199                    "        stolen"
 200                    "  journal_hint"
 201                    "journal_nohint"
 202                    "\n"
 203                    " %14lu"
 204                    " %14lu"
 205                    " %14lu"
 206                    " %14lu"
 207                    " %14lu"
 208                    " %14lu"
 209                    " %14lu"
 210                    "\n",
 211                    SFP(free_block),
 212                    SFPF(call),
 213                    SFPF(wait),
 214                    SFPF(bmap),
 215                    SFPF(retry),
 216                    SFPF(stolen),
 217                    SFPF(in_journal_hint), SFPF(in_journal_nohint));
 218
 219         return 0;
 220 }
 221
 222 static int show_on_disk_super(struct seq_file *m, struct super_block *sb)
 223 {
 224         struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
 225         struct reiserfs_super_block *rs = sb_info->s_rs;
 226         int hash_code = DFL(s_hash_function_code);
 227         __u32 flags = DJF(s_flags);
 228
 229         seq_printf(m, "block_count: \t%i\n"
 230                    "free_blocks: \t%i\n"
 231                    "root_block: \t%i\n"
 232                    "blocksize: \t%i\n"
 233                    "oid_maxsize: \t%i\n"
 234                    "oid_cursize: \t%i\n"
 235                    "umount_state: \t%i\n"
 236                    "magic: \t%10.10s\n"
 237                    "fs_state: \t%i\n"
 238                    "hash: \t%s\n"
 239                    "tree_height: \t%i\n"
 240                    "bmap_nr: \t%i\n"
 241                    "version: \t%i\n"
 242                    "flags: \t%x[%s]\n"
 243                    "reserved_for_journal: \t%i\n",
 244                    DFL(s_block_count),
 245                    DFL(s_free_blocks),
 246                    DFL(s_root_block),
 247                    DF(s_blocksize),
 248                    DF(s_oid_maxsize),
 249                    DF(s_oid_cursize),
 250                    DF(s_umount_state),
 251                    rs->s_v1.s_magic,
 252                    DF(s_fs_state),
 253                    hash_code == TEA_HASH ? "tea" :
 254                    (hash_code == YURA_HASH) ? "rupasov" :
 255                    (hash_code == R5_HASH) ? "r5" :
 256                    (hash_code == UNSET_HASH) ? "unset" : "unknown",
 257                    DF(s_tree_height),
 258                    DF(s_bmap_nr),
 259                    DF(s_version), flags, (flags & reiserfs_attrs_cleared)
 260                    ? "attrs_cleared" : "", DF(s_reserved_for_journal));
 261
 262         return 0;
 263 }
 264
 265 static int show_oidmap(struct seq_file *m, struct super_block *sb)
 266 {
 267         struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
 268         struct reiserfs_super_block *rs = sb_info->s_rs;
 269         unsigned int mapsize = le16_to_cpu(rs->s_v1.s_oid_cursize);
 270         unsigned long total_used = 0;
 271         int i;
 272
 273         for (i = 0; i < mapsize; ++i) {
 274                 __u32 right;
 275
 276                 right = (i == mapsize - 1) ? MAX_KEY_OBJECTID : MAP(i + 1);
 277                 seq_printf(m, "%s: [ %x .. %x )\n",
 278                            (i & 1) ? "free" : "used", MAP(i), right);
 279                 if (!(i & 1)) {
 280                         total_used += right - MAP(i);
 281                 }
 282         }
 283 #if defined( REISERFS_USE_OIDMAPF )
 284         if (sb_info->oidmap.use_file && (sb_info->oidmap.mapf != NULL)) {
 285                 loff_t size = sb_info->oidmap.mapf->f_path.dentry->d_inode->i_size;
 286                 total_used += size / sizeof(reiserfs_oidinterval_d_t);
 287         }
 288 #endif
 289         seq_printf(m, "total: \t%i [%i/%i] used: %lu [exact]\n",
 290                    mapsize,
 291                    mapsize, le16_to_cpu(rs->s_v1.s_oid_maxsize), total_used);
 292         return 0;
 293 }
 294
 295 static int show_journal(struct seq_file *m, struct super_block *sb)
 296 {
 297         struct reiserfs_sb_info *r = REISERFS_SB(sb);
 298         struct reiserfs_super_block *rs = r->s_rs;
 299         struct journal_params *jp = &rs->s_v1.s_journal;
 300         char b[BDEVNAME_SIZE];
 301
 302         seq_printf(m,           /* on-disk fields */
 303                    "jp_journal_1st_block: \t%i\n"
 304                    "jp_journal_dev: \t%s[%x]\n"
 305                    "jp_journal_size: \t%i\n"
 306                    "jp_journal_trans_max: \t%i\n"
 307                    "jp_journal_magic: \t%i\n"
 308                    "jp_journal_max_batch: \t%i\n"
 309                    "jp_journal_max_commit_age: \t%i\n"
 310                    "jp_journal_max_trans_age: \t%i\n"
 311                    /* incore fields */
 312                    "j_1st_reserved_block: \t%i\n"
 313                    "j_state: \t%li\n"
 314                    "j_trans_id: \t%u\n"
 315                    "j_mount_id: \t%lu\n"
 316                    "j_start: \t%lu\n"
 317                    "j_len: \t%lu\n"
 318                    "j_len_alloc: \t%lu\n"
 319                    "j_wcount: \t%i\n"
 320                    "j_bcount: \t%lu\n"
 321                    "j_first_unflushed_offset: \t%lu\n"
 322                    "j_last_flush_trans_id: \t%u\n"
 323                    "j_trans_start_time: \t%li\n"
 324                    "j_list_bitmap_index: \t%i\n"
 325                    "j_must_wait: \t%i\n"
 326                    "j_next_full_flush: \t%i\n"
 327                    "j_next_async_flush: \t%i\n"
 328                    "j_cnode_used: \t%i\n" "j_cnode_free: \t%i\n" "\n"
 329                    /* reiserfs_proc_info_data_t.journal fields */
 330                    "in_journal: \t%12lu\n"
 331                    "in_journal_bitmap: \t%12lu\n"
 332                    "in_journal_reusable: \t%12lu\n"
 333                    "lock_journal: \t%12lu\n"
 334                    "lock_journal_wait: \t%12lu\n"
 335                    "journal_begin: \t%12lu\n"
 336                    "journal_relock_writers: \t%12lu\n"
 337                    "journal_relock_wcount: \t%12lu\n"
 338                    "mark_dirty: \t%12lu\n"
 339                    "mark_dirty_already: \t%12lu\n"
 340                    "mark_dirty_notjournal: \t%12lu\n"
 341                    "restore_prepared: \t%12lu\n"
 342                    "prepare: \t%12lu\n"
 343                    "prepare_retry: \t%12lu\n",
 344                    DJP(jp_journal_1st_block),
 345                    bdevname(SB_JOURNAL(sb)->j_dev_bd, b),
 346                    DJP(jp_journal_dev),
 347                    DJP(jp_journal_size),
 348                    DJP(jp_journal_trans_max),
 349                    DJP(jp_journal_magic),
 350                    DJP(jp_journal_max_batch),
 351                    SB_JOURNAL(sb)->j_max_commit_age,
 352                    DJP(jp_journal_max_trans_age),
 353                    JF(j_1st_reserved_block),
 354                    JF(j_state),
 355                    JF(j_trans_id),
 356                    JF(j_mount_id),
 357                    JF(j_start),
 358                    JF(j_len),
 359                    JF(j_len_alloc),
 360                    atomic_read(&r->s_journal->j_wcount),
 361                    JF(j_bcount),
 362                    JF(j_first_unflushed_offset),
 363                    JF(j_last_flush_trans_id),
 364                    JF(j_trans_start_time),
 365                    JF(j_list_bitmap_index),
 366                    JF(j_must_wait),
 367                    JF(j_next_full_flush),
 368                    JF(j_next_async_flush),
 369                    JF(j_cnode_used),
 370                    JF(j_cnode_free),
 371                    SFPJ(in_journal),
 372                    SFPJ(in_journal_bitmap),
 373                    SFPJ(in_journal_reusable),
 374                    SFPJ(lock_journal),
 375                    SFPJ(lock_journal_wait),
 376                    SFPJ(journal_being),
 377                    SFPJ(journal_relock_writers),
 378                    SFPJ(journal_relock_wcount),
 379                    SFPJ(mark_dirty),
 380                    SFPJ(mark_dirty_already),
 381                    SFPJ(mark_dirty_notjournal),
 382                    SFPJ(restore_prepared), SFPJ(prepare), SFPJ(prepare_retry)
 383             );
 384         return 0;
 385 }
 386
 387 /* iterator */
 388 static int test_sb(struct super_block *sb, void *data)
 389 {
 390         return data == sb;
 391 }
 392
 393 static int set_sb(struct super_block *sb, void *data)
 394 {
 395         return -ENOENT;
 396 }
 397
 398 static void *r_start(struct seq_file *m, loff_t * pos)
 399 {
 400         struct proc_dir_entry *de = m->private;
 401         struct super_block *s = de->parent->data;
 402         loff_t l = *pos;
 403
 404         if (l)
 405                 return NULL;
 406
 407         if (IS_ERR(sget(&reiserfs_fs_type, test_sb, set_sb, s)))
 408                 return NULL;
 409
 410         up_write(&s->s_umount);
 411         return s;
 412 }
 413
 414 static void *r_next(struct seq_file *m, void *v, loff_t * pos)
 415 {
 416         ++*pos;
 417         if (v)
 418                 deactivate_super(v);
 419         return NULL;
 420 }
 421
 422 static void r_stop(struct seq_file *m, void *v)
 423 {
 424         if (v)
 425                 deactivate_super(v);
 426 }
 427
 428 static int r_show(struct seq_file *m, void *v)
 429 {
 430         struct proc_dir_entry *de = m->private;
 431         int (*show) (struct seq_file *, struct super_block *) = de->data;
 432         return show(m, v);
 433 }
 434
 435 static const struct seq_operations r_ops = {
 436         .start = r_start,
 437         .next = r_next,
 438         .stop = r_stop,
 439         .show = r_show,
 440 };
 441
 442 static int r_open(struct inode *inode, struct file *file)
 443 {
 444         int ret = seq_open(file, &r_ops);
 445
 446         if (!ret) {
 447                 struct seq_file *m = file->private_data;
 448                 m->private = PDE(inode);
 449         }
 450         return ret;
 451 }
 452
 453 static const struct file_operations r_file_operations = {
 454         .open = r_open,
 455         .read = seq_read,
 456         .llseek = seq_lseek,
 457         .release = seq_release,
 458         .owner = THIS_MODULE,
 459 };
 460
 461 static struct proc_dir_entry *proc_info_root = NULL;
 462 static const char proc_info_root_name[] = "fs/reiserfs";
 463
 464 static void add_file(struct super_block *sb, char *name,
 465                      int (*func) (struct seq_file *, struct super_block *))
 466 {
 467         proc_create_data(name, 0, REISERFS_SB(sb)->procdir,
 468                          &r_file_operations, func);
 469 }
 470
 471 int reiserfs_proc_info_init(struct super_block *sb)
 472 {
 473         char b[BDEVNAME_SIZE];
 474         char *s;
 475
 476         /* Some block devices use /'s */
 477         strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
 478         s = strchr(b, '/');
 479         if (s)
 480                 *s = '!';
 481
 482         spin_lock_init(&__PINFO(sb).lock);
 483         REISERFS_SB(sb)->procdir = proc_mkdir(b, proc_info_root);
 484         if (REISERFS_SB(sb)->procdir) {
 485                 REISERFS_SB(sb)->procdir->data = sb;
 486                 add_file(sb, "version", show_version);
 487                 add_file(sb, "super", show_super);
 488                 add_file(sb, "per-level", show_per_level);
 489                 add_file(sb, "bitmap", show_bitmap);
 490                 add_file(sb, "on-disk-super", show_on_disk_super);
 491                 add_file(sb, "oidmap", show_oidmap);
 492                 add_file(sb, "journal", show_journal);
 493                 return 0;
 494         }
 495         reiserfs_warning(sb, "cannot create /proc/%s/%s",
 496                          proc_info_root_name, b);
 497         return 1;
 498 }
 499
 500 int reiserfs_proc_info_done(struct super_block *sb)
 501 {
 502         struct proc_dir_entry *de = REISERFS_SB(sb)->procdir;
 503         char b[BDEVNAME_SIZE];
 504         char *s;
 505
 506         /* Some block devices use /'s */
 507         strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
 508         s = strchr(b, '/');
 509         if (s)
 510                 *s = '!';
 511
 512         if (de) {
 513                 remove_proc_entry("journal", de);
 514                 remove_proc_entry("oidmap", de);
 515                 remove_proc_entry("on-disk-super", de);
 516                 remove_proc_entry("bitmap", de);
 517                 remove_proc_entry("per-level", de);
 518                 remove_proc_entry("super", de);
 519                 remove_proc_entry("version", de);
 520         }
 521         spin_lock(&__PINFO(sb).lock);
 522         __PINFO(sb).exiting = 1;
 523         spin_unlock(&__PINFO(sb).lock);
 524         if (proc_info_root) {
 525                 remove_proc_entry(b, proc_info_root);
 526                 REISERFS_SB(sb)->procdir = NULL;
 527         }
 528         return 0;
 529 }
 530
 531 int reiserfs_proc_info_global_init(void)
 532 {
 533         if (proc_info_root == NULL) {
 534                 proc_info_root = proc_mkdir(proc_info_root_name, NULL);
 535                 if (!proc_info_root) {
 536                         reiserfs_warning(NULL, "cannot create /proc/%s",
 537                                          proc_info_root_name);
 538                         return 1;
 539                 }
 540         }
 541         return 0;
 542 }
 543
 544 int reiserfs_proc_info_global_done(void)
 545 {
 546         if (proc_info_root != NULL) {
 547                 proc_info_root = NULL;
 548                 remove_proc_entry(proc_info_root_name, NULL);
 549         }
 550         return 0;
 551 }
 552 /*
 553  * Revision 1.1.8.2  2001/07/15 17:08:42  god
 554  *  . use get_super() in procfs.c
 555  *  . remove remove_save_link() from reiserfs_do_truncate()
 556  *
 557  * I accept terms and conditions stated in the Legal Agreement
 558  * (available at http://www.namesys.com/legalese.html)
 559  *
 560  * Revision 1.1.8.1  2001/07/11 16:48:50  god
 561  * proc info support
 562  *
 563  * I accept terms and conditions stated in the Legal Agreement
 564  * (available at http://www.namesys.com/legalese.html)
 565  *
 566  */
 567
 568 /*
 569  * Make Linus happy.
 570  * Local variables:
 571  * c-indentation-style: "K&R"
 572  * mode-name: "LC"
 573  * c-basic-offset: 8
 574  * tab-width: 8
 575  * End:
 576  */