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 #ifdef CONFIG_REISERFS_PROC_INFO
  21
  22 /*
  23  * LOCKING:
  24  *
  25  * We rely on new Alexander Viro's super-block locking.
  26  *
  27  */
  28
  29 static int show_version(struct seq_file *m, struct super_block *sb)
  30 {
  31         char *format;
  32
  33         if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_6)) {
  34                 format = "3.6";
  35         } else if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_5)) {
  36                 format = "3.5";
  37         } else {
  38                 format = "unknown";
  39         }
  40
  41         seq_printf(m, "%s format\twith checks %s\n", format,
  42 #if defined( CONFIG_REISERFS_CHECK )
  43                    "on"
  44 #else
  45                    "off"
  46 #endif
  47             );
  48         return 0;
  49 }
  50
  51 #define SF( x ) ( r -> x )
  52 #define SFP( x ) SF( s_proc_info_data.x )
  53 #define SFPL( x ) SFP( x[ level ] )
  54 #define SFPF( x ) SFP( scan_bitmap.x )
  55 #define SFPJ( x ) SFP( journal.x )
  56
  57 #define D2C( x ) le16_to_cpu( x )
  58 #define D4C( x ) le32_to_cpu( x )
  59 #define DF( x ) D2C( rs -> s_v1.x )
  60 #define DFL( x ) D4C( rs -> s_v1.x )
  61
  62 #define objectid_map( s, rs ) (old_format_only (s) ?                            \
  63                          (__le32 *)((struct reiserfs_super_block_v1 *)rs + 1) : \
  64                          (__le32 *)(rs + 1))
  65 #define MAP( i ) D4C( objectid_map( sb, rs )[ i ] )
  66
  67 #define DJF( x ) le32_to_cpu( rs -> x )
  68 #define DJV( x ) le32_to_cpu( s_v1 -> x )
  69 #define DJP( x ) le32_to_cpu( jp -> x )
  70 #define JF( x ) ( r -> s_journal -> x )
  71
  72 static int show_super(struct seq_file *m, struct super_block *sb)
  73 {
  74         struct reiserfs_sb_info *r = REISERFS_SB(sb);
  75
  76         seq_printf(m, "state: \t%s\n"
  77                    "mount options: \t%s%s%s%s%s%s%s%s%s%s%s\n"
  78                    "gen. counter: \t%i\n"
  79                    "s_disk_reads: \t%i\n"
  80                    "s_disk_writes: \t%i\n"
  81                    "s_fix_nodes: \t%i\n"
  82                    "s_do_balance: \t%i\n"
  83                    "s_unneeded_left_neighbor: \t%i\n"
  84                    "s_good_search_by_key_reada: \t%i\n"
  85                    "s_bmaps: \t%i\n"
  86                    "s_bmaps_without_search: \t%i\n"
  87                    "s_direct2indirect: \t%i\n"
  88                    "s_indirect2direct: \t%i\n"
  89                    "\n"
  90                    "max_hash_collisions: \t%i\n"
  91                    "breads: \t%lu\n"
  92                    "bread_misses: \t%lu\n"
  93                    "search_by_key: \t%lu\n"
  94                    "search_by_key_fs_changed: \t%lu\n"
  95                    "search_by_key_restarted: \t%lu\n"
  96                    "insert_item_restarted: \t%lu\n"
  97                    "paste_into_item_restarted: \t%lu\n"
  98                    "cut_from_item_restarted: \t%lu\n"
  99                    "delete_solid_item_restarted: \t%lu\n"
 100                    "delete_item_restarted: \t%lu\n"
 101                    "leaked_oid: \t%lu\n"
 102                    "leaves_removable: \t%lu\n",
 103                    SF(s_mount_state) == REISERFS_VALID_FS ?
 104                    "REISERFS_VALID_FS" : "REISERFS_ERROR_FS",
 105                    reiserfs_r5_hash(sb) ? "FORCE_R5 " : "",
 106                    reiserfs_rupasov_hash(sb) ? "FORCE_RUPASOV " : "",
 107                    reiserfs_tea_hash(sb) ? "FORCE_TEA " : "",
 108                    reiserfs_hash_detect(sb) ? "DETECT_HASH " : "",
 109                    reiserfs_no_border(sb) ? "NO_BORDER " : "BORDER ",
 110                    reiserfs_no_unhashed_relocation(sb) ?
 111                    "NO_UNHASHED_RELOCATION " : "",
 112                    reiserfs_hashed_relocation(sb) ? "UNHASHED_RELOCATION " : "",
 113                    reiserfs_test4(sb) ? "TEST4 " : "",
 114                    have_large_tails(sb) ? "TAILS " : have_small_tails(sb) ?
 115                    "SMALL_TAILS " : "NO_TAILS ",
 116                    replay_only(sb) ? "REPLAY_ONLY " : "",
 117                    convert_reiserfs(sb) ? "CONV " : "",
 118                    atomic_read(&r->s_generation_counter),
 119                    SF(s_disk_reads), SF(s_disk_writes), SF(s_fix_nodes),
 120                    SF(s_do_balance), SF(s_unneeded_left_neighbor),
 121                    SF(s_good_search_by_key_reada), SF(s_bmaps),
 122                    SF(s_bmaps_without_search), SF(s_direct2indirect),
 123                    SF(s_indirect2direct), SFP(max_hash_collisions), SFP(breads),
 124                    SFP(bread_miss), SFP(search_by_key),
 125                    SFP(search_by_key_fs_changed), SFP(search_by_key_restarted),
 126                    SFP(insert_item_restarted), SFP(paste_into_item_restarted),
 127                    SFP(cut_from_item_restarted),
 128                    SFP(delete_solid_item_restarted), SFP(delete_item_restarted),
 129                    SFP(leaked_oid), SFP(leaves_removable));
 130
 131         return 0;
 132 }
 133
 134 static int show_per_level(struct seq_file *m, struct super_block *sb)
 135 {
 136         struct reiserfs_sb_info *r = REISERFS_SB(sb);
 137         int level;
 138
 139         seq_printf(m, "level\t"
 140                    "     balances"
 141                    " [sbk:  reads"
 142                    "   fs_changed"
 143                    "   restarted]"
 144                    "   free space"
 145                    "        items"
 146                    "   can_remove"
 147                    "         lnum"
 148                    "         rnum"
 149                    "       lbytes"
 150                    "       rbytes"
 151                    "     get_neig"
 152                    " get_neig_res" "  need_l_neig" "  need_r_neig" "\n");
 153
 154         for (level = 0; level < MAX_HEIGHT; ++level) {
 155                 seq_printf(m, "%i\t"
 156                            " %12lu"
 157                            " %12lu"
 158                            " %12lu"
 159                            " %12lu"
 160                            " %12lu"
 161                            " %12lu"
 162                            " %12lu"
 163                            " %12li"
 164                            " %12li"
 165                            " %12li"
 166                            " %12li"
 167                            " %12lu"
 168                            " %12lu"
 169                            " %12lu"
 170                            " %12lu"
 171                            "\n",
 172                            level,
 173                            SFPL(balance_at),
 174                            SFPL(sbk_read_at),
 175                            SFPL(sbk_fs_changed),
 176                            SFPL(sbk_restarted),
 177                            SFPL(free_at),
 178                            SFPL(items_at),
 179                            SFPL(can_node_be_removed),
 180                            SFPL(lnum),
 181                            SFPL(rnum),
 182                            SFPL(lbytes),
 183                            SFPL(rbytes),
 184                            SFPL(get_neighbors),
 185                            SFPL(get_neighbors_restart),
 186                            SFPL(need_l_neighbor), SFPL(need_r_neighbor)
 187                     );
 188         }
 189         return 0;
 190 }
 191
 192 static int show_bitmap(struct seq_file *m, struct super_block *sb)
 193 {
 194         struct reiserfs_sb_info *r = REISERFS_SB(sb);
 195
 196         seq_printf(m, "free_block: %lu\n"
 197                    "  scan_bitmap:"
 198                    "          wait"
 199                    "          bmap"
 200                    "         retry"
 201                    "        stolen"
 202                    "  journal_hint"
 203                    "journal_nohint"
 204                    "\n"
 205                    " %14lu"
 206                    " %14lu"
 207                    " %14lu"
 208                    " %14lu"
 209                    " %14lu"
 210                    " %14lu"
 211                    " %14lu"
 212                    "\n",
 213                    SFP(free_block),
 214                    SFPF(call),
 215                    SFPF(wait),
 216                    SFPF(bmap),
 217                    SFPF(retry),
 218                    SFPF(stolen),
 219                    SFPF(in_journal_hint), SFPF(in_journal_nohint));
 220
 221         return 0;
 222 }
 223
 224 static int show_on_disk_super(struct seq_file *m, struct super_block *sb)
 225 {
 226         struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
 227         struct reiserfs_super_block *rs = sb_info->s_rs;
 228         int hash_code = DFL(s_hash_function_code);
 229         __u32 flags = DJF(s_flags);
 230
 231         seq_printf(m, "block_count: \t%i\n"
 232                    "free_blocks: \t%i\n"
 233                    "root_block: \t%i\n"
 234                    "blocksize: \t%i\n"
 235                    "oid_maxsize: \t%i\n"
 236                    "oid_cursize: \t%i\n"
 237                    "umount_state: \t%i\n"
 238                    "magic: \t%10.10s\n"
 239                    "fs_state: \t%i\n"
 240                    "hash: \t%s\n"
 241                    "tree_height: \t%i\n"
 242                    "bmap_nr: \t%i\n"
 243                    "version: \t%i\n"
 244                    "flags: \t%x[%s]\n"
 245                    "reserved_for_journal: \t%i\n",
 246                    DFL(s_block_count),
 247                    DFL(s_free_blocks),
 248                    DFL(s_root_block),
 249                    DF(s_blocksize),
 250                    DF(s_oid_maxsize),
 251                    DF(s_oid_cursize),
 252                    DF(s_umount_state),
 253                    rs->s_v1.s_magic,
 254                    DF(s_fs_state),
 255                    hash_code == TEA_HASH ? "tea" :
 256                    (hash_code == YURA_HASH) ? "rupasov" :
 257                    (hash_code == R5_HASH) ? "r5" :
 258                    (hash_code == UNSET_HASH) ? "unset" : "unknown",
 259                    DF(s_tree_height),
 260                    DF(s_bmap_nr),
 261                    DF(s_version), flags, (flags & reiserfs_attrs_cleared)
 262                    ? "attrs_cleared" : "", DF(s_reserved_for_journal));
 263
 264         return 0;
 265 }
 266
 267 static int show_oidmap(struct seq_file *m, struct super_block *sb)
 268 {
 269         struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
 270         struct reiserfs_super_block *rs = sb_info->s_rs;
 271         unsigned int mapsize = le16_to_cpu(rs->s_v1.s_oid_cursize);
 272         unsigned long total_used = 0;
 273         int i;
 274
 275         for (i = 0; i < mapsize; ++i) {
 276                 __u32 right;
 277
 278                 right = (i == mapsize - 1) ? MAX_KEY_OBJECTID : MAP(i + 1);
 279                 seq_printf(m, "%s: [ %x .. %x )\n",
 280                            (i & 1) ? "free" : "used", MAP(i), right);
 281                 if (!(i & 1)) {
 282                         total_used += right - MAP(i);
 283                 }
 284         }
 285 #if defined( REISERFS_USE_OIDMAPF )
 286         if (sb_info->oidmap.use_file && (sb_info->oidmap.mapf != NULL)) {
 287                 loff_t size = sb_info->oidmap.mapf->f_path.dentry->d_inode->i_size;
 288                 total_used += size / sizeof(reiserfs_oidinterval_d_t);
 289         }
 290 #endif
 291         seq_printf(m, "total: \t%i [%i/%i] used: %lu [exact]\n",
 292                    mapsize,
 293                    mapsize, le16_to_cpu(rs->s_v1.s_oid_maxsize), total_used);
 294         return 0;
 295 }
 296
 297 static int show_journal(struct seq_file *m, struct super_block *sb)
 298 {
 299         struct reiserfs_sb_info *r = REISERFS_SB(sb);
 300         struct reiserfs_super_block *rs = r->s_rs;
 301         struct journal_params *jp = &rs->s_v1.s_journal;
 302         char b[BDEVNAME_SIZE];
 303
 304         seq_printf(m,           /* on-disk fields */
 305                    "jp_journal_1st_block: \t%i\n"
 306                    "jp_journal_dev: \t%s[%x]\n"
 307                    "jp_journal_size: \t%i\n"
 308                    "jp_journal_trans_max: \t%i\n"
 309                    "jp_journal_magic: \t%i\n"
 310                    "jp_journal_max_batch: \t%i\n"
 311                    "jp_journal_max_commit_age: \t%i\n"
 312                    "jp_journal_max_trans_age: \t%i\n"
 313                    /* incore fields */
 314                    "j_1st_reserved_block: \t%i\n"
 315                    "j_state: \t%li\n"
 316                    "j_trans_id: \t%u\n"
 317                    "j_mount_id: \t%lu\n"
 318                    "j_start: \t%lu\n"
 319                    "j_len: \t%lu\n"
 320                    "j_len_alloc: \t%lu\n"
 321                    "j_wcount: \t%i\n"
 322                    "j_bcount: \t%lu\n"
 323                    "j_first_unflushed_offset: \t%lu\n"
 324                    "j_last_flush_trans_id: \t%u\n"
 325                    "j_trans_start_time: \t%li\n"
 326                    "j_list_bitmap_index: \t%i\n"
 327                    "j_must_wait: \t%i\n"
 328                    "j_next_full_flush: \t%i\n"
 329                    "j_next_async_flush: \t%i\n"
 330                    "j_cnode_used: \t%i\n" "j_cnode_free: \t%i\n" "\n"
 331                    /* reiserfs_proc_info_data_t.journal fields */
 332                    "in_journal: \t%12lu\n"
 333                    "in_journal_bitmap: \t%12lu\n"
 334                    "in_journal_reusable: \t%12lu\n"
 335                    "lock_journal: \t%12lu\n"
 336                    "lock_journal_wait: \t%12lu\n"
 337                    "journal_begin: \t%12lu\n"
 338                    "journal_relock_writers: \t%12lu\n"
 339                    "journal_relock_wcount: \t%12lu\n"
 340                    "mark_dirty: \t%12lu\n"
 341                    "mark_dirty_already: \t%12lu\n"
 342                    "mark_dirty_notjournal: \t%12lu\n"
 343                    "restore_prepared: \t%12lu\n"
 344                    "prepare: \t%12lu\n"
 345                    "prepare_retry: \t%12lu\n",
 346                    DJP(jp_journal_1st_block),
 347                    bdevname(SB_JOURNAL(sb)->j_dev_bd, b),
 348                    DJP(jp_journal_dev),
 349                    DJP(jp_journal_size),
 350                    DJP(jp_journal_trans_max),
 351                    DJP(jp_journal_magic),
 352                    DJP(jp_journal_max_batch),
 353                    SB_JOURNAL(sb)->j_max_commit_age,
 354                    DJP(jp_journal_max_trans_age),
 355                    JF(j_1st_reserved_block),
 356                    JF(j_state),
 357                    JF(j_trans_id),
 358                    JF(j_mount_id),
 359                    JF(j_start),
 360                    JF(j_len),
 361                    JF(j_len_alloc),
 362                    atomic_read(&r->s_journal->j_wcount),
 363                    JF(j_bcount),
 364                    JF(j_first_unflushed_offset),
 365                    JF(j_last_flush_trans_id),
 366                    JF(j_trans_start_time),
 367                    JF(j_list_bitmap_index),
 368                    JF(j_must_wait),
 369                    JF(j_next_full_flush),
 370                    JF(j_next_async_flush),
 371                    JF(j_cnode_used),
 372                    JF(j_cnode_free),
 373                    SFPJ(in_journal),
 374                    SFPJ(in_journal_bitmap),
 375                    SFPJ(in_journal_reusable),
 376                    SFPJ(lock_journal),
 377                    SFPJ(lock_journal_wait),
 378                    SFPJ(journal_being),
 379                    SFPJ(journal_relock_writers),
 380                    SFPJ(journal_relock_wcount),
 381                    SFPJ(mark_dirty),
 382                    SFPJ(mark_dirty_already),
 383                    SFPJ(mark_dirty_notjournal),
 384                    SFPJ(restore_prepared), SFPJ(prepare), SFPJ(prepare_retry)
 385             );
 386         return 0;
 387 }
 388
 389 /* iterator */
 390 static int test_sb(struct super_block *sb, void *data)
 391 {
 392         return data == sb;
 393 }
 394
 395 static int set_sb(struct super_block *sb, void *data)
 396 {
 397         return -ENOENT;
 398 }
 399
 400 static void *r_start(struct seq_file *m, loff_t * pos)
 401 {
 402         struct proc_dir_entry *de = m->private;
 403         struct super_block *s = de->parent->data;
 404         loff_t l = *pos;
 405
 406         if (l)
 407                 return NULL;
 408
 409         if (IS_ERR(sget(&reiserfs_fs_type, test_sb, set_sb, s)))
 410                 return NULL;
 411
 412         up_write(&s->s_umount);
 413         return s;
 414 }
 415
 416 static void *r_next(struct seq_file *m, void *v, loff_t * pos)
 417 {
 418         ++*pos;
 419         if (v)
 420                 deactivate_super(v);
 421         return NULL;
 422 }
 423
 424 static void r_stop(struct seq_file *m, void *v)
 425 {
 426         if (v)
 427                 deactivate_super(v);
 428 }
 429
 430 static int r_show(struct seq_file *m, void *v)
 431 {
 432         struct proc_dir_entry *de = m->private;
 433         int (*show) (struct seq_file *, struct super_block *) = de->data;
 434         return 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         int ret = seq_open(file, &r_ops);
 447
 448         if (!ret) {
 449                 struct seq_file *m = file->private_data;
 450                 m->private = PDE(inode);
 451         }
 452         return ret;
 453 }
 454
 455 static const struct file_operations r_file_operations = {
 456         .open = r_open,
 457         .read = seq_read,
 458         .llseek = seq_lseek,
 459         .release = seq_release,
 460         .owner = THIS_MODULE,
 461 };
 462
 463 static struct proc_dir_entry *proc_info_root = NULL;
 464 static const char proc_info_root_name[] = "fs/reiserfs";
 465
 466 static void add_file(struct super_block *sb, char *name,
 467                      int (*func) (struct seq_file *, struct super_block *))
 468 {
 469         proc_create_data(name, 0, REISERFS_SB(sb)->procdir,
 470                          &r_file_operations, func);
 471 }
 472
 473 int reiserfs_proc_info_init(struct super_block *sb)
 474 {
 475         char b[BDEVNAME_SIZE];
 476         char *s;
 477
 478         /* Some block devices use /'s */
 479         strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
 480         s = strchr(b, '/');
 481         if (s)
 482                 *s = '!';
 483
 484         spin_lock_init(&__PINFO(sb).lock);
 485         REISERFS_SB(sb)->procdir = proc_mkdir(b, proc_info_root);
 486         if (REISERFS_SB(sb)->procdir) {
 487                 REISERFS_SB(sb)->procdir->data = sb;
 488                 add_file(sb, "version", show_version);
 489                 add_file(sb, "super", show_super);
 490                 add_file(sb, "per-level", show_per_level);
 491                 add_file(sb, "bitmap", show_bitmap);
 492                 add_file(sb, "on-disk-super", show_on_disk_super);
 493                 add_file(sb, "oidmap", show_oidmap);
 494                 add_file(sb, "journal", show_journal);
 495                 return 0;
 496         }
 497         reiserfs_warning(sb, "cannot create /proc/%s/%s",
 498                          proc_info_root_name, b);
 499         return 1;
 500 }
 501
 502 int reiserfs_proc_info_done(struct super_block *sb)
 503 {
 504         struct proc_dir_entry *de = REISERFS_SB(sb)->procdir;
 505         char b[BDEVNAME_SIZE];
 506         char *s;
 507
 508         /* Some block devices use /'s */
 509         strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE);
 510         s = strchr(b, '/');
 511         if (s)
 512                 *s = '!';
 513
 514         if (de) {
 515                 remove_proc_entry("journal", de);
 516                 remove_proc_entry("oidmap", de);
 517                 remove_proc_entry("on-disk-super", de);
 518                 remove_proc_entry("bitmap", de);
 519                 remove_proc_entry("per-level", de);
 520                 remove_proc_entry("super", de);
 521                 remove_proc_entry("version", de);
 522         }
 523         spin_lock(&__PINFO(sb).lock);
 524         __PINFO(sb).exiting = 1;
 525         spin_unlock(&__PINFO(sb).lock);
 526         if (proc_info_root) {
 527                 remove_proc_entry(b, proc_info_root);
 528                 REISERFS_SB(sb)->procdir = NULL;
 529         }
 530         return 0;
 531 }
 532
 533 int reiserfs_proc_info_global_init(void)
 534 {
 535         if (proc_info_root == NULL) {
 536                 proc_info_root = proc_mkdir(proc_info_root_name, NULL);
 537                 if (!proc_info_root) {
 538                         reiserfs_warning(NULL, "cannot create /proc/%s",
 539                                          proc_info_root_name);
 540                         return 1;
 541                 }
 542         }
 543         return 0;
 544 }
 545
 546 int reiserfs_proc_info_global_done(void)
 547 {
 548         if (proc_info_root != NULL) {
 549                 proc_info_root = NULL;
 550                 remove_proc_entry(proc_info_root_name, NULL);
 551         }
 552         return 0;
 553 }
 554
 555 /* REISERFS_PROC_INFO */
 556 #else
 557
 558 int reiserfs_proc_info_init(struct super_block *sb)
 559 {
 560         return 0;
 561 }
 562 int reiserfs_proc_info_done(struct super_block *sb)
 563 {
 564         return 0;
 565 }
 566
 567 int reiserfs_proc_info_global_init(void)
 568 {
 569         return 0;
 570 }
 571 int reiserfs_proc_info_global_done(void)
 572 {
 573         return 0;
 574 }
 575 /* REISERFS_PROC_INFO */
 576 #endif
 577
 578 /*
 579  * Revision 1.1.8.2  2001/07/15 17:08:42  god
 580  *  . use get_super() in procfs.c
 581  *  . remove remove_save_link() from reiserfs_do_truncate()
 582  *
 583  * I accept terms and conditions stated in the Legal Agreement
 584  * (available at http://www.namesys.com/legalese.html)
 585  *
 586  * Revision 1.1.8.1  2001/07/11 16:48:50  god
 587  * proc info support
 588  *
 589  * I accept terms and conditions stated in the Legal Agreement
 590  * (available at http://www.namesys.com/legalese.html)
 591  *
 592  */
 593
 594 /*
 595  * Make Linus happy.
 596  * Local variables:
 597  * c-indentation-style: "K&R"
 598  * mode-name: "LC"
 599  * c-basic-offset: 8
 600  * tab-width: 8
 601  * End:
 602  */