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 */ 570