kernel/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 <linux/uaccess.h>
  15 #include "reiserfs.h"
  16 #include <linux/init.h>
  17 #include <linux/proc_fs.h>
  18
  19 /*
  20  * LOCKING:
  21  *
  22  * These guys are evicted from procfs as the very first step in ->kill_sb().
  23  *
  24  */
  25
  26 static int show_version(struct seq_file *m, void *unused)
  27 {
  28         struct super_block *sb = m->private;
  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, void *unused)
  71 {
  72         struct super_block *sb = m->private;
  73         struct reiserfs_sb_info *r = REISERFS_SB(sb);
  74
  75         seq_printf(m, "state: \t%s\n"
  76                    "mount options: \t%s%s%s%s%s%s%s%s%s%s%s\n"
  77                    "gen. counter: \t%i\n"
  78                    "s_disk_reads: \t%i\n"
  79                    "s_disk_writes: \t%i\n"
  80                    "s_fix_nodes: \t%i\n"
  81                    "s_do_balance: \t%i\n"
  82                    "s_unneeded_left_neighbor: \t%i\n"
  83                    "s_good_search_by_key_reada: \t%i\n"
  84                    "s_bmaps: \t%i\n"
  85                    "s_bmaps_without_search: \t%i\n"
  86                    "s_direct2indirect: \t%i\n"
  87                    "s_indirect2direct: \t%i\n"
  88                    "\n"
  89                    "max_hash_collisions: \t%i\n"
  90                    "breads: \t%lu\n"
  91                    "bread_misses: \t%lu\n"
  92                    "search_by_key: \t%lu\n"
  93                    "search_by_key_fs_changed: \t%lu\n"
  94                    "search_by_key_restarted: \t%lu\n"
  95                    "insert_item_restarted: \t%lu\n"
  96                    "paste_into_item_restarted: \t%lu\n"
  97                    "cut_from_item_restarted: \t%lu\n"
  98                    "delete_solid_item_restarted: \t%lu\n"
  99                    "delete_item_restarted: \t%lu\n"
 100                    "leaked_oid: \t%lu\n"
 101                    "leaves_removable: \t%lu\n",
 102                    SF(s_mount_state) == REISERFS_VALID_FS ?
 103                    "REISERFS_VALID_FS" : "REISERFS_ERROR_FS",
 104                    reiserfs_r5_hash(sb) ? "FORCE_R5 " : "",
 105                    reiserfs_rupasov_hash(sb) ? "FORCE_RUPASOV " : "",
 106                    reiserfs_tea_hash(sb) ? "FORCE_TEA " : "",
 107                    reiserfs_hash_detect(sb) ? "DETECT_HASH " : "",
 108                    reiserfs_no_border(sb) ? "NO_BORDER " : "BORDER ",
 109                    reiserfs_no_unhashed_relocation(sb) ?
 110                    "NO_UNHASHED_RELOCATION " : "",
 111                    reiserfs_hashed_relocation(sb) ? "UNHASHED_RELOCATION " : "",
 112                    reiserfs_test4(sb) ? "TEST4 " : "",
 113                    have_large_tails(sb) ? "TAILS " : have_small_tails(sb) ?
 114                    "SMALL_TAILS " : "NO_TAILS ",
 115                    replay_only(sb) ? "REPLAY_ONLY " : "",
 116                    convert_reiserfs(sb) ? "CONV " : "",
 117                    atomic_read(&r->s_generation_counter),
 118                    SF(s_disk_reads), SF(s_disk_writes), SF(s_fix_nodes),
 119                    SF(s_do_balance), SF(s_unneeded_left_neighbor),
 120                    SF(s_good_search_by_key_reada), SF(s_bmaps),
 121                    SF(s_bmaps_without_search), SF(s_direct2indirect),
 122                    SF(s_indirect2direct), SFP(max_hash_collisions), SFP(breads),
 123                    SFP(bread_miss), SFP(search_by_key),
 124                    SFP(search_by_key_fs_changed), SFP(search_by_key_restarted),
 125                    SFP(insert_item_restarted), SFP(paste_into_item_restarted),
 126                    SFP(cut_from_item_restarted),
 127                    SFP(delete_solid_item_restarted), SFP(delete_item_restarted),
 128                    SFP(leaked_oid), SFP(leaves_removable));
 129
 130         return 0;
 131 }
 132
 133 static int show_per_level(struct seq_file *m, void *unused)
 134 {
 135         struct super_block *sb = m->private;
 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, void *unused)
 193 {
 194         struct super_block *sb = m->private;
 195         struct reiserfs_sb_info *r = REISERFS_SB(sb);
 196
 197         seq_printf(m, "free_block: %lu\n"
 198                    "  scan_bitmap:"
 199                    "          wait"
 200                    "          bmap"
 201                    "         retry"
 202                    "        stolen"
 203                    "  journal_hint"
 204                    "journal_nohint"
 205                    "\n"
 206                    " %14lu"
 207                    " %14lu"
 208                    " %14lu"
 209                    " %14lu"
 210                    " %14lu"
 211                    " %14lu"
 212                    " %14lu"
 213                    "\n",
 214                    SFP(free_block),
 215                    SFPF(call),
 216                    SFPF(wait),
 217                    SFPF(bmap),
 218                    SFPF(retry),
 219                    SFPF(stolen),
 220                    SFPF(in_journal_hint), SFPF(in_journal_nohint));
 221
 222         return 0;
 223 }
 224
 225 static int show_on_disk_super(struct seq_file *m, void *unused)
 226 {
 227         struct super_block *sb = m->private;
 228         struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
 229         struct reiserfs_super_block *rs = sb_info->s_rs;
 230         int hash_code = DFL(s_hash_function_code);
 231         __u32 flags = DJF(s_flags);
 232
 233         seq_printf(m, "block_count: \t%i\n"
 234                    "free_blocks: \t%i\n"
 235                    "root_block: \t%i\n"
 236                    "blocksize: \t%i\n"
 237                    "oid_maxsize: \t%i\n"
 238                    "oid_cursize: \t%i\n"
 239                    "umount_state: \t%i\n"
 240                    "magic: \t%10.10s\n"
 241                    "fs_state: \t%i\n"
 242                    "hash: \t%s\n"
 243                    "tree_height: \t%i\n"
 244                    "bmap_nr: \t%i\n"
 245                    "version: \t%i\n"
 246                    "flags: \t%x[%s]\n"
 247                    "reserved_for_journal: \t%i\n",
 248                    DFL(s_block_count),
 249                    DFL(s_free_blocks),
 250                    DFL(s_root_block),
 251                    DF(s_blocksize),
 252                    DF(s_oid_maxsize),
 253                    DF(s_oid_cursize),
 254                    DF(s_umount_state),
 255                    rs->s_v1.s_magic,
 256                    DF(s_fs_state),
 257                    hash_code == TEA_HASH ? "tea" :
 258                    (hash_code == YURA_HASH) ? "rupasov" :
 259                    (hash_code == R5_HASH) ? "r5" :
 260                    (hash_code == UNSET_HASH) ? "unset" : "unknown",
 261                    DF(s_tree_height),
 262                    DF(s_bmap_nr),
 263                    DF(s_version), flags, (flags & reiserfs_attrs_cleared)
 264                    ? "attrs_cleared" : "", DF(s_reserved_for_journal));
 265
 266         return 0;
 267 }
 268
 269 static int show_oidmap(struct seq_file *m, void *unused)
 270 {
 271         struct super_block *sb = m->private;
 272         struct reiserfs_sb_info *sb_info = REISERFS_SB(sb);
 273         struct reiserfs_super_block *rs = sb_info->s_rs;
 274         unsigned int mapsize = le16_to_cpu(rs->s_v1.s_oid_cursize);
 275         unsigned long total_used = 0;
 276         int i;
 277
 278         for (i = 0; i < mapsize; ++i) {
 279                 __u32 right;
 280
 281                 right = (i == mapsize - 1) ? MAX_KEY_OBJECTID : MAP(i + 1);
 282                 seq_printf(m, "%s: [ %x .. %x )\n",
 283                            (i & 1) ? "free" : "used", MAP(i), right);
 284                 if (!(i & 1)) {
 285                         total_used += right - MAP(i);
 286                 }
 287         }
 288 #if defined( REISERFS_USE_OIDMAPF )
 289         if (sb_info->oidmap.use_file && (sb_info->oidmap.mapf != NULL)) {
 290                 loff_t size = file_inode(sb_info->oidmap.mapf)->i_size;
 291                 total_used += size / sizeof(reiserfs_oidinterval_d_t);
 292         }
 293 #endif
 294         seq_printf(m, "total: \t%i [%i/%i] used: %lu [exact]\n",
 295                    mapsize,
 296                    mapsize, le16_to_cpu(rs->s_v1.s_oid_maxsize), total_used);
 297         return 0;
 298 }
 299
 300 static int show_journal(struct seq_file *m, void *unused)
 301 {
 302         struct super_block *sb = m->private;
 303         struct reiserfs_sb_info *r = REISERFS_SB(sb);
 304         struct reiserfs_super_block *rs = r->s_rs;
 305         struct journal_params *jp = &rs->s_v1.s_journal;
 306         char b[BDEVNAME_SIZE];
 307
 308         seq_printf(m,           /* on-disk fields */
 309                    "jp_journal_1st_block: \t%i\n"
 310                    "jp_journal_dev: \t%s[%x]\n"
 311                    "jp_journal_size: \t%i\n"
 312                    "jp_journal_trans_max: \t%i\n"
 313                    "jp_journal_magic: \t%i\n"
 314                    "jp_journal_max_batch: \t%i\n"
 315                    "jp_journal_max_commit_age: \t%i\n"
 316                    "jp_journal_max_trans_age: \t%i\n"
 317                    /* incore fields */
 318                    "j_1st_reserved_block: \t%i\n"
 319                    "j_state: \t%li\n"
 320                    "j_trans_id: \t%u\n"
 321                    "j_mount_id: \t%lu\n"
 322                    "j_start: \t%lu\n"
 323                    "j_len: \t%lu\n"
 324                    "j_len_alloc: \t%lu\n"
 325                    "j_wcount: \t%i\n"
 326                    "j_bcount: \t%lu\n"
 327                    "j_first_unflushed_offset: \t%lu\n"
 328                    "j_last_flush_trans_id: \t%u\n"
 329                    "j_trans_start_time: \t%li\n"
 330                    "j_list_bitmap_index: \t%i\n"
 331                    "j_must_wait: \t%i\n"
 332                    "j_next_full_flush: \t%i\n"
 333                    "j_next_async_flush: \t%i\n"
 334                    "j_cnode_used: \t%i\n" "j_cnode_free: \t%i\n" "\n"
 335                    /* reiserfs_proc_info_data_t.journal fields */
 336                    "in_journal: \t%12lu\n"
 337                    "in_journal_bitmap: \t%12lu\n"
 338                    "in_journal_reusable: \t%12lu\n"
 339                    "lock_journal: \t%12lu\n"
 340                    "lock_journal_wait: \t%12lu\n"
 341                    "journal_begin: \t%12lu\n"
 342                    "journal_relock_writers: \t%12lu\n"
 343                    "journal_relock_wcount: \t%12lu\n"
 344                    "mark_dirty: \t%12lu\n"
 345                    "mark_dirty_already: \t%12lu\n"
 346                    "mark_dirty_notjournal: \t%12lu\n"
 347                    "restore_prepared: \t%12lu\n"
 348                    "prepare: \t%12lu\n"
 349                    "prepare_retry: \t%12lu\n",
 350                    DJP(jp_journal_1st_block),
 351                    bdevname(SB_JOURNAL(sb)->j_dev_bd, b),
 352                    DJP(jp_journal_dev),
 353                    DJP(jp_journal_size),
 354                    DJP(jp_journal_trans_max),
 355                    DJP(jp_journal_magic),
 356                    DJP(jp_journal_max_batch),
 357                    SB_JOURNAL(sb)->j_max_commit_age,
 358                    DJP(jp_journal_max_trans_age),
 359                    JF(j_1st_reserved_block),
 360                    JF(j_state),
 361                    JF(j_trans_id),
 362                    JF(j_mount_id),
 363                    JF(j_start),
 364                    JF(j_len),
 365                    JF(j_len_alloc),
 366                    atomic_read(&r->s_journal->j_wcount),
 367                    JF(j_bcount),
 368                    JF(j_first_unflushed_offset),
 369                    JF(j_last_flush_trans_id),
 370                    JF(j_trans_start_time),
 371                    JF(j_list_bitmap_index),
 372                    JF(j_must_wait),
 373                    JF(j_next_full_flush),
 374                    JF(j_next_async_flush),
 375                    JF(j_cnode_used),
 376                    JF(j_cnode_free),
 377                    SFPJ(in_journal),
 378                    SFPJ(in_journal_bitmap),
 379                    SFPJ(in_journal_reusable),
 380                    SFPJ(lock_journal),
 381                    SFPJ(lock_journal_wait),
 382                    SFPJ(journal_being),
 383                    SFPJ(journal_relock_writers),
 384                    SFPJ(journal_relock_wcount),
 385                    SFPJ(mark_dirty),
 386                    SFPJ(mark_dirty_already),
 387                    SFPJ(mark_dirty_notjournal),
 388                    SFPJ(restore_prepared), SFPJ(prepare), SFPJ(prepare_retry)
 389             );
 390         return 0;
 391 }
 392
 393 static int r_open(struct inode *inode, struct file *file)
 394 {
 395         return single_open(file, PDE_DATA(inode),
 396                                 proc_get_parent_data(inode));
 397 }
 398
 399 static const struct file_operations r_file_operations = {
 400         .open = r_open,
 401         .read = seq_read,
 402         .llseek = seq_lseek,
 403         .release = single_release,
 404 };
 405
 406 static struct proc_dir_entry *proc_info_root = NULL;
 407 static const char proc_info_root_name[] = "fs/reiserfs";
 408
 409 static void add_file(struct super_block *sb, char *name,
 410                      int (*func) (struct seq_file *, void *))
 411 {
 412         proc_create_data(name, 0, REISERFS_SB(sb)->procdir,
 413                          &r_file_operations, func);
 414 }
 415
 416 int reiserfs_proc_info_init(struct super_block *sb)
 417 {
 418         char b[BDEVNAME_SIZE];
 419         char *s;
 420
 421         /* Some block devices use /'s */
 422         strlcpy(b, sb->s_id, BDEVNAME_SIZE);
 423         s = strchr(b, '/');
 424         if (s)
 425                 *s = '!';
 426
 427         spin_lock_init(&__PINFO(sb).lock);
 428         REISERFS_SB(sb)->procdir = proc_mkdir_data(b, 0, proc_info_root, sb);
 429         if (REISERFS_SB(sb)->procdir) {
 430                 add_file(sb, "version", show_version);
 431                 add_file(sb, "super", show_super);
 432                 add_file(sb, "per-level", show_per_level);
 433                 add_file(sb, "bitmap", show_bitmap);
 434                 add_file(sb, "on-disk-super", show_on_disk_super);
 435                 add_file(sb, "oidmap", show_oidmap);
 436                 add_file(sb, "journal", show_journal);
 437                 return 0;
 438         }
 439         reiserfs_warning(sb, "cannot create /proc/%s/%s",
 440                          proc_info_root_name, b);
 441         return 1;
 442 }
 443
 444 int reiserfs_proc_info_done(struct super_block *sb)
 445 {
 446         struct proc_dir_entry *de = REISERFS_SB(sb)->procdir;
 447         if (de) {
 448                 char b[BDEVNAME_SIZE];
 449                 char *s;
 450
 451                 /* Some block devices use /'s */
 452                 strlcpy(b, sb->s_id, BDEVNAME_SIZE);
 453                 s = strchr(b, '/');
 454                 if (s)
 455                         *s = '!';
 456
 457                 remove_proc_subtree(b, proc_info_root);
 458                 REISERFS_SB(sb)->procdir = NULL;
 459         }
 460         return 0;
 461 }
 462
 463 int reiserfs_proc_info_global_init(void)
 464 {
 465         if (proc_info_root == NULL) {
 466                 proc_info_root = proc_mkdir(proc_info_root_name, NULL);
 467                 if (!proc_info_root) {
 468                         reiserfs_warning(NULL, "cannot create /proc/%s",
 469                                          proc_info_root_name);
 470                         return 1;
 471                 }
 472         }
 473         return 0;
 474 }
 475
 476 int reiserfs_proc_info_global_done(void)
 477 {
 478         if (proc_info_root != NULL) {
 479                 proc_info_root = NULL;
 480                 remove_proc_entry(proc_info_root_name, NULL);
 481         }
 482         return 0;
 483 }
 484 /*
 485  * Revision 1.1.8.2  2001/07/15 17:08:42  god
 486  *  . use get_super() in procfs.c
 487  *  . remove remove_save_link() from reiserfs_do_truncate()
 488  *
 489  * I accept terms and conditions stated in the Legal Agreement
 490  * (available at http://www.namesys.com/legalese.html)
 491  *
 492  * Revision 1.1.8.1  2001/07/11 16:48:50  god
 493  * proc info support
 494  *
 495  * I accept terms and conditions stated in the Legal Agreement
 496  * (available at http://www.namesys.com/legalese.html)
 497  *
 498  */
 499
 500 /*
 501  * Make Linus happy.
 502  * Local variables:
 503  * c-indentation-style: "K&R"
 504  * mode-name: "LC"
 505  * c-basic-offset: 8
 506  * tab-width: 8
 507  * End:
 508  */