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 int reiserfs_global_version_in_proc(char *buffer, char **start, off_t offset, 52 int count, int *eof, void *data) 53 { 54 *start = buffer; 55 *eof = 1; 56 return 0; 57 } 58 59 #define SF( x ) ( r -> x ) 60 #define SFP( x ) SF( s_proc_info_data.x ) 61 #define SFPL( x ) SFP( x[ level ] ) 62 #define SFPF( x ) SFP( scan_bitmap.x ) 63 #define SFPJ( x ) SFP( journal.x ) 64 65 #define D2C( x ) le16_to_cpu( x ) 66 #define D4C( x ) le32_to_cpu( x ) 67 #define DF( x ) D2C( rs -> s_v1.x ) 68 #define DFL( x ) D4C( rs -> s_v1.x ) 69 70 #define objectid_map( s, rs ) (old_format_only (s) ? \ 71 (__le32 *)((struct reiserfs_super_block_v1 *)rs + 1) : \ 72 (__le32 *)(rs + 1)) 73 #define MAP( i ) D4C( objectid_map( sb, rs )[ i ] ) 74 75 #define DJF( x ) le32_to_cpu( rs -> x ) 76 #define DJV( x ) le32_to_cpu( s_v1 -> x ) 77 #define DJP( x ) le32_to_cpu( jp -> x ) 78 #define JF( x ) ( r -> s_journal -> x ) 79 80 static int show_super(struct seq_file *m, struct super_block *sb) 81 { 82 struct reiserfs_sb_info *r = REISERFS_SB(sb); 83 84 seq_printf(m, "state: \t%s\n" 85 "mount options: \t%s%s%s%s%s%s%s%s%s%s%s\n" 86 "gen. counter: \t%i\n" 87 "s_disk_reads: \t%i\n" 88 "s_disk_writes: \t%i\n" 89 "s_fix_nodes: \t%i\n" 90 "s_do_balance: \t%i\n" 91 "s_unneeded_left_neighbor: \t%i\n" 92 "s_good_search_by_key_reada: \t%i\n" 93 "s_bmaps: \t%i\n" 94 "s_bmaps_without_search: \t%i\n" 95 "s_direct2indirect: \t%i\n" 96 "s_indirect2direct: \t%i\n" 97 "\n" 98 "max_hash_collisions: \t%i\n" 99 "breads: \t%lu\n" 100 "bread_misses: \t%lu\n" 101 "search_by_key: \t%lu\n" 102 "search_by_key_fs_changed: \t%lu\n" 103 "search_by_key_restarted: \t%lu\n" 104 "insert_item_restarted: \t%lu\n" 105 "paste_into_item_restarted: \t%lu\n" 106 "cut_from_item_restarted: \t%lu\n" 107 "delete_solid_item_restarted: \t%lu\n" 108 "delete_item_restarted: \t%lu\n" 109 "leaked_oid: \t%lu\n" 110 "leaves_removable: \t%lu\n", 111 SF(s_mount_state) == REISERFS_VALID_FS ? 112 "REISERFS_VALID_FS" : "REISERFS_ERROR_FS", 113 reiserfs_r5_hash(sb) ? "FORCE_R5 " : "", 114 reiserfs_rupasov_hash(sb) ? "FORCE_RUPASOV " : "", 115 reiserfs_tea_hash(sb) ? "FORCE_TEA " : "", 116 reiserfs_hash_detect(sb) ? "DETECT_HASH " : "", 117 reiserfs_no_border(sb) ? "NO_BORDER " : "BORDER ", 118 reiserfs_no_unhashed_relocation(sb) ? 119 "NO_UNHASHED_RELOCATION " : "", 120 reiserfs_hashed_relocation(sb) ? "UNHASHED_RELOCATION " : "", 121 reiserfs_test4(sb) ? "TEST4 " : "", 122 have_large_tails(sb) ? "TAILS " : have_small_tails(sb) ? 123 "SMALL_TAILS " : "NO_TAILS ", 124 replay_only(sb) ? "REPLAY_ONLY " : "", 125 convert_reiserfs(sb) ? "CONV " : "", 126 atomic_read(&r->s_generation_counter), 127 SF(s_disk_reads), SF(s_disk_writes), SF(s_fix_nodes), 128 SF(s_do_balance), SF(s_unneeded_left_neighbor), 129 SF(s_good_search_by_key_reada), SF(s_bmaps), 130 SF(s_bmaps_without_search), SF(s_direct2indirect), 131 SF(s_indirect2direct), SFP(max_hash_collisions), SFP(breads), 132 SFP(bread_miss), SFP(search_by_key), 133 SFP(search_by_key_fs_changed), SFP(search_by_key_restarted), 134 SFP(insert_item_restarted), SFP(paste_into_item_restarted), 135 SFP(cut_from_item_restarted), 136 SFP(delete_solid_item_restarted), SFP(delete_item_restarted), 137 SFP(leaked_oid), SFP(leaves_removable)); 138 139 return 0; 140 } 141 142 static int show_per_level(struct seq_file *m, struct super_block *sb) 143 { 144 struct reiserfs_sb_info *r = REISERFS_SB(sb); 145 int level; 146 147 seq_printf(m, "level\t" 148 " balances" 149 " [sbk: reads" 150 " fs_changed" 151 " restarted]" 152 " free space" 153 " items" 154 " can_remove" 155 " lnum" 156 " rnum" 157 " lbytes" 158 " rbytes" 159 " get_neig" 160 " get_neig_res" " need_l_neig" " need_r_neig" "\n"); 161 162 for (level = 0; level < MAX_HEIGHT; ++level) { 163 seq_printf(m, "%i\t" 164 " %12lu" 165 " %12lu" 166 " %12lu" 167 " %12lu" 168 " %12lu" 169 " %12lu" 170 " %12lu" 171 " %12li" 172 " %12li" 173 " %12li" 174 " %12li" 175 " %12lu" 176 " %12lu" 177 " %12lu" 178 " %12lu" 179 "\n", 180 level, 181 SFPL(balance_at), 182 SFPL(sbk_read_at), 183 SFPL(sbk_fs_changed), 184 SFPL(sbk_restarted), 185 SFPL(free_at), 186 SFPL(items_at), 187 SFPL(can_node_be_removed), 188 SFPL(lnum), 189 SFPL(rnum), 190 SFPL(lbytes), 191 SFPL(rbytes), 192 SFPL(get_neighbors), 193 SFPL(get_neighbors_restart), 194 SFPL(need_l_neighbor), SFPL(need_r_neighbor) 195 ); 196 } 197 return 0; 198 } 199 200 static int show_bitmap(struct seq_file *m, struct super_block *sb) 201 { 202 struct reiserfs_sb_info *r = REISERFS_SB(sb); 203 204 seq_printf(m, "free_block: %lu\n" 205 " scan_bitmap:" 206 " wait" 207 " bmap" 208 " retry" 209 " stolen" 210 " journal_hint" 211 "journal_nohint" 212 "\n" 213 " %14lu" 214 " %14lu" 215 " %14lu" 216 " %14lu" 217 " %14lu" 218 " %14lu" 219 " %14lu" 220 "\n", 221 SFP(free_block), 222 SFPF(call), 223 SFPF(wait), 224 SFPF(bmap), 225 SFPF(retry), 226 SFPF(stolen), 227 SFPF(in_journal_hint), SFPF(in_journal_nohint)); 228 229 return 0; 230 } 231 232 static int show_on_disk_super(struct seq_file *m, struct super_block *sb) 233 { 234 struct reiserfs_sb_info *sb_info = REISERFS_SB(sb); 235 struct reiserfs_super_block *rs = sb_info->s_rs; 236 int hash_code = DFL(s_hash_function_code); 237 __u32 flags = DJF(s_flags); 238 239 seq_printf(m, "block_count: \t%i\n" 240 "free_blocks: \t%i\n" 241 "root_block: \t%i\n" 242 "blocksize: \t%i\n" 243 "oid_maxsize: \t%i\n" 244 "oid_cursize: \t%i\n" 245 "umount_state: \t%i\n" 246 "magic: \t%10.10s\n" 247 "fs_state: \t%i\n" 248 "hash: \t%s\n" 249 "tree_height: \t%i\n" 250 "bmap_nr: \t%i\n" 251 "version: \t%i\n" 252 "flags: \t%x[%s]\n" 253 "reserved_for_journal: \t%i\n", 254 DFL(s_block_count), 255 DFL(s_free_blocks), 256 DFL(s_root_block), 257 DF(s_blocksize), 258 DF(s_oid_maxsize), 259 DF(s_oid_cursize), 260 DF(s_umount_state), 261 rs->s_v1.s_magic, 262 DF(s_fs_state), 263 hash_code == TEA_HASH ? "tea" : 264 (hash_code == YURA_HASH) ? "rupasov" : 265 (hash_code == R5_HASH) ? "r5" : 266 (hash_code == UNSET_HASH) ? "unset" : "unknown", 267 DF(s_tree_height), 268 DF(s_bmap_nr), 269 DF(s_version), flags, (flags & reiserfs_attrs_cleared) 270 ? "attrs_cleared" : "", DF(s_reserved_for_journal)); 271 272 return 0; 273 } 274 275 static int show_oidmap(struct seq_file *m, struct super_block *sb) 276 { 277 struct reiserfs_sb_info *sb_info = REISERFS_SB(sb); 278 struct reiserfs_super_block *rs = sb_info->s_rs; 279 unsigned int mapsize = le16_to_cpu(rs->s_v1.s_oid_cursize); 280 unsigned long total_used = 0; 281 int i; 282 283 for (i = 0; i < mapsize; ++i) { 284 __u32 right; 285 286 right = (i == mapsize - 1) ? MAX_KEY_OBJECTID : MAP(i + 1); 287 seq_printf(m, "%s: [ %x .. %x )\n", 288 (i & 1) ? "free" : "used", MAP(i), right); 289 if (!(i & 1)) { 290 total_used += right - MAP(i); 291 } 292 } 293 #if defined( REISERFS_USE_OIDMAPF ) 294 if (sb_info->oidmap.use_file && (sb_info->oidmap.mapf != NULL)) { 295 loff_t size = sb_info->oidmap.mapf->f_path.dentry->d_inode->i_size; 296 total_used += size / sizeof(reiserfs_oidinterval_d_t); 297 } 298 #endif 299 seq_printf(m, "total: \t%i [%i/%i] used: %lu [exact]\n", 300 mapsize, 301 mapsize, le16_to_cpu(rs->s_v1.s_oid_maxsize), total_used); 302 return 0; 303 } 304 305 static int show_journal(struct seq_file *m, struct super_block *sb) 306 { 307 struct reiserfs_sb_info *r = REISERFS_SB(sb); 308 struct reiserfs_super_block *rs = r->s_rs; 309 struct journal_params *jp = &rs->s_v1.s_journal; 310 char b[BDEVNAME_SIZE]; 311 312 seq_printf(m, /* on-disk fields */ 313 "jp_journal_1st_block: \t%i\n" 314 "jp_journal_dev: \t%s[%x]\n" 315 "jp_journal_size: \t%i\n" 316 "jp_journal_trans_max: \t%i\n" 317 "jp_journal_magic: \t%i\n" 318 "jp_journal_max_batch: \t%i\n" 319 "jp_journal_max_commit_age: \t%i\n" 320 "jp_journal_max_trans_age: \t%i\n" 321 /* incore fields */ 322 "j_1st_reserved_block: \t%i\n" 323 "j_state: \t%li\n" 324 "j_trans_id: \t%u\n" 325 "j_mount_id: \t%lu\n" 326 "j_start: \t%lu\n" 327 "j_len: \t%lu\n" 328 "j_len_alloc: \t%lu\n" 329 "j_wcount: \t%i\n" 330 "j_bcount: \t%lu\n" 331 "j_first_unflushed_offset: \t%lu\n" 332 "j_last_flush_trans_id: \t%u\n" 333 "j_trans_start_time: \t%li\n" 334 "j_list_bitmap_index: \t%i\n" 335 "j_must_wait: \t%i\n" 336 "j_next_full_flush: \t%i\n" 337 "j_next_async_flush: \t%i\n" 338 "j_cnode_used: \t%i\n" "j_cnode_free: \t%i\n" "\n" 339 /* reiserfs_proc_info_data_t.journal fields */ 340 "in_journal: \t%12lu\n" 341 "in_journal_bitmap: \t%12lu\n" 342 "in_journal_reusable: \t%12lu\n" 343 "lock_journal: \t%12lu\n" 344 "lock_journal_wait: \t%12lu\n" 345 "journal_begin: \t%12lu\n" 346 "journal_relock_writers: \t%12lu\n" 347 "journal_relock_wcount: \t%12lu\n" 348 "mark_dirty: \t%12lu\n" 349 "mark_dirty_already: \t%12lu\n" 350 "mark_dirty_notjournal: \t%12lu\n" 351 "restore_prepared: \t%12lu\n" 352 "prepare: \t%12lu\n" 353 "prepare_retry: \t%12lu\n", 354 DJP(jp_journal_1st_block), 355 bdevname(SB_JOURNAL(sb)->j_dev_bd, b), 356 DJP(jp_journal_dev), 357 DJP(jp_journal_size), 358 DJP(jp_journal_trans_max), 359 DJP(jp_journal_magic), 360 DJP(jp_journal_max_batch), 361 SB_JOURNAL(sb)->j_max_commit_age, 362 DJP(jp_journal_max_trans_age), 363 JF(j_1st_reserved_block), 364 JF(j_state), 365 JF(j_trans_id), 366 JF(j_mount_id), 367 JF(j_start), 368 JF(j_len), 369 JF(j_len_alloc), 370 atomic_read(&r->s_journal->j_wcount), 371 JF(j_bcount), 372 JF(j_first_unflushed_offset), 373 JF(j_last_flush_trans_id), 374 JF(j_trans_start_time), 375 JF(j_list_bitmap_index), 376 JF(j_must_wait), 377 JF(j_next_full_flush), 378 JF(j_next_async_flush), 379 JF(j_cnode_used), 380 JF(j_cnode_free), 381 SFPJ(in_journal), 382 SFPJ(in_journal_bitmap), 383 SFPJ(in_journal_reusable), 384 SFPJ(lock_journal), 385 SFPJ(lock_journal_wait), 386 SFPJ(journal_being), 387 SFPJ(journal_relock_writers), 388 SFPJ(journal_relock_wcount), 389 SFPJ(mark_dirty), 390 SFPJ(mark_dirty_already), 391 SFPJ(mark_dirty_notjournal), 392 SFPJ(restore_prepared), SFPJ(prepare), SFPJ(prepare_retry) 393 ); 394 return 0; 395 } 396 397 /* iterator */ 398 static int test_sb(struct super_block *sb, void *data) 399 { 400 return data == sb; 401 } 402 403 static int set_sb(struct super_block *sb, void *data) 404 { 405 return -ENOENT; 406 } 407 408 static void *r_start(struct seq_file *m, loff_t * pos) 409 { 410 struct proc_dir_entry *de = m->private; 411 struct super_block *s = de->parent->data; 412 loff_t l = *pos; 413 414 if (l) 415 return NULL; 416 417 if (IS_ERR(sget(&reiserfs_fs_type, test_sb, set_sb, s))) 418 return NULL; 419 420 up_write(&s->s_umount); 421 return s; 422 } 423 424 static void *r_next(struct seq_file *m, void *v, loff_t * pos) 425 { 426 ++*pos; 427 if (v) 428 deactivate_super(v); 429 return NULL; 430 } 431 432 static void r_stop(struct seq_file *m, void *v) 433 { 434 if (v) 435 deactivate_super(v); 436 } 437 438 static int r_show(struct seq_file *m, void *v) 439 { 440 struct proc_dir_entry *de = m->private; 441 int (*show) (struct seq_file *, struct super_block *) = de->data; 442 return show(m, v); 443 } 444 445 static const struct seq_operations r_ops = { 446 .start = r_start, 447 .next = r_next, 448 .stop = r_stop, 449 .show = r_show, 450 }; 451 452 static int r_open(struct inode *inode, struct file *file) 453 { 454 int ret = seq_open(file, &r_ops); 455 456 if (!ret) { 457 struct seq_file *m = file->private_data; 458 m->private = PDE(inode); 459 } 460 return ret; 461 } 462 463 static const struct file_operations r_file_operations = { 464 .open = r_open, 465 .read = seq_read, 466 .llseek = seq_lseek, 467 .release = seq_release, 468 .owner = THIS_MODULE, 469 }; 470 471 static struct proc_dir_entry *proc_info_root = NULL; 472 static const char proc_info_root_name[] = "fs/reiserfs"; 473 474 static void add_file(struct super_block *sb, char *name, 475 int (*func) (struct seq_file *, struct super_block *)) 476 { 477 proc_create_data(name, 0, REISERFS_SB(sb)->procdir, 478 &r_file_operations, func); 479 } 480 481 int reiserfs_proc_info_init(struct super_block *sb) 482 { 483 char b[BDEVNAME_SIZE]; 484 char *s; 485 486 /* Some block devices use /'s */ 487 strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE); 488 s = strchr(b, '/'); 489 if (s) 490 *s = '!'; 491 492 spin_lock_init(&__PINFO(sb).lock); 493 REISERFS_SB(sb)->procdir = proc_mkdir(b, proc_info_root); 494 if (REISERFS_SB(sb)->procdir) { 495 REISERFS_SB(sb)->procdir->data = sb; 496 add_file(sb, "version", show_version); 497 add_file(sb, "super", show_super); 498 add_file(sb, "per-level", show_per_level); 499 add_file(sb, "bitmap", show_bitmap); 500 add_file(sb, "on-disk-super", show_on_disk_super); 501 add_file(sb, "oidmap", show_oidmap); 502 add_file(sb, "journal", show_journal); 503 return 0; 504 } 505 reiserfs_warning(sb, "cannot create /proc/%s/%s", 506 proc_info_root_name, b); 507 return 1; 508 } 509 510 int reiserfs_proc_info_done(struct super_block *sb) 511 { 512 struct proc_dir_entry *de = REISERFS_SB(sb)->procdir; 513 char b[BDEVNAME_SIZE]; 514 char *s; 515 516 /* Some block devices use /'s */ 517 strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE); 518 s = strchr(b, '/'); 519 if (s) 520 *s = '!'; 521 522 if (de) { 523 remove_proc_entry("journal", de); 524 remove_proc_entry("oidmap", de); 525 remove_proc_entry("on-disk-super", de); 526 remove_proc_entry("bitmap", de); 527 remove_proc_entry("per-level", de); 528 remove_proc_entry("super", de); 529 remove_proc_entry("version", de); 530 } 531 spin_lock(&__PINFO(sb).lock); 532 __PINFO(sb).exiting = 1; 533 spin_unlock(&__PINFO(sb).lock); 534 if (proc_info_root) { 535 remove_proc_entry(b, proc_info_root); 536 REISERFS_SB(sb)->procdir = NULL; 537 } 538 return 0; 539 } 540 541 struct proc_dir_entry *reiserfs_proc_register_global(char *name, 542 read_proc_t * func) 543 { 544 return (proc_info_root) ? create_proc_read_entry(name, 0, 545 proc_info_root, 546 func, NULL) : NULL; 547 } 548 549 void reiserfs_proc_unregister_global(const char *name) 550 { 551 remove_proc_entry(name, proc_info_root); 552 } 553 554 int reiserfs_proc_info_global_init(void) 555 { 556 if (proc_info_root == NULL) { 557 proc_info_root = proc_mkdir(proc_info_root_name, NULL); 558 if (!proc_info_root) { 559 reiserfs_warning(NULL, "cannot create /proc/%s", 560 proc_info_root_name); 561 return 1; 562 } 563 } 564 return 0; 565 } 566 567 int reiserfs_proc_info_global_done(void) 568 { 569 if (proc_info_root != NULL) { 570 proc_info_root = NULL; 571 remove_proc_entry(proc_info_root_name, NULL); 572 } 573 return 0; 574 } 575 576 /* REISERFS_PROC_INFO */ 577 #else 578 579 int reiserfs_proc_info_init(struct super_block *sb) 580 { 581 return 0; 582 } 583 int reiserfs_proc_info_done(struct super_block *sb) 584 { 585 return 0; 586 } 587 588 struct proc_dir_entry *reiserfs_proc_register_global(char *name, 589 read_proc_t * func) 590 { 591 return NULL; 592 } 593 594 void reiserfs_proc_unregister_global(const char *name) 595 {; 596 } 597 598 int reiserfs_proc_info_global_init(void) 599 { 600 return 0; 601 } 602 int reiserfs_proc_info_global_done(void) 603 { 604 return 0; 605 } 606 607 int reiserfs_global_version_in_proc(char *buffer, char **start, 608 off_t offset, 609 int count, int *eof, void *data) 610 { 611 return 0; 612 } 613 614 /* REISERFS_PROC_INFO */ 615 #endif 616 617 /* 618 * Revision 1.1.8.2 2001/07/15 17:08:42 god 619 * . use get_super() in procfs.c 620 * . remove remove_save_link() from reiserfs_do_truncate() 621 * 622 * I accept terms and conditions stated in the Legal Agreement 623 * (available at http://www.namesys.com/legalese.html) 624 * 625 * Revision 1.1.8.1 2001/07/11 16:48:50 god 626 * proc info support 627 * 628 * I accept terms and conditions stated in the Legal Agreement 629 * (available at http://www.namesys.com/legalese.html) 630 * 631 */ 632 633 /* 634 * Make Linus happy. 635 * Local variables: 636 * c-indentation-style: "K&R" 637 * mode-name: "LC" 638 * c-basic-offset: 8 639 * tab-width: 8 640 * End: 641 */ 642