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 /* $Id: procfs.c,v 1.1.8.2 2001/07/15 17:08:42 god Exp $ */ 12 13 #include <linux/module.h> 14 #include <linux/time.h> 15 #include <linux/seq_file.h> 16 #include <asm/uaccess.h> 17 #include <linux/reiserfs_fs.h> 18 #include <linux/reiserfs_fs_sb.h> 19 #include <linux/smp_lock.h> 20 #include <linux/init.h> 21 #include <linux/proc_fs.h> 22 23 #if defined( REISERFS_PROC_INFO ) 24 25 /* 26 * LOCKING: 27 * 28 * We rely on new Alexander Viro's super-block locking. 29 * 30 */ 31 32 static int show_version(struct seq_file *m, struct super_block *sb) 33 { 34 char *format; 35 36 if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_6)) { 37 format = "3.6"; 38 } else if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_5)) { 39 format = "3.5"; 40 } else { 41 format = "unknown"; 42 } 43 44 seq_printf(m, "%s format\twith checks %s\n", format, 45 #if defined( CONFIG_REISERFS_CHECK ) 46 "on" 47 #else 48 "off" 49 #endif 50 ); 51 return 0; 52 } 53 54 int reiserfs_global_version_in_proc(char *buffer, char **start, off_t offset, 55 int count, int *eof, void *data) 56 { 57 *start = buffer; 58 *eof = 1; 59 return 0; 60 } 61 62 #define SF( x ) ( r -> x ) 63 #define SFP( x ) SF( s_proc_info_data.x ) 64 #define SFPL( x ) SFP( x[ level ] ) 65 #define SFPF( x ) SFP( scan_bitmap.x ) 66 #define SFPJ( x ) SFP( journal.x ) 67 68 #define D2C( x ) le16_to_cpu( x ) 69 #define D4C( x ) le32_to_cpu( x ) 70 #define DF( x ) D2C( rs -> s_v1.x ) 71 #define DFL( x ) D4C( rs -> s_v1.x ) 72 73 #define objectid_map( s, rs ) (old_format_only (s) ? \ 74 (__le32 *)((struct reiserfs_super_block_v1 *)rs + 1) : \ 75 (__le32 *)(rs + 1)) 76 #define MAP( i ) D4C( objectid_map( sb, rs )[ i ] ) 77 78 #define DJF( x ) le32_to_cpu( rs -> x ) 79 #define DJV( x ) le32_to_cpu( s_v1 -> x ) 80 #define DJP( x ) le32_to_cpu( jp -> x ) 81 #define JF( x ) ( r -> s_journal -> x ) 82 83 static int show_super(struct seq_file *m, struct super_block *sb) 84 { 85 struct reiserfs_sb_info *r = REISERFS_SB(sb); 86 87 seq_printf(m, "state: \t%s\n" 88 "mount options: \t%s%s%s%s%s%s%s%s%s%s%s\n" 89 "gen. counter: \t%i\n" 90 "s_disk_reads: \t%i\n" 91 "s_disk_writes: \t%i\n" 92 "s_fix_nodes: \t%i\n" 93 "s_do_balance: \t%i\n" 94 "s_unneeded_left_neighbor: \t%i\n" 95 "s_good_search_by_key_reada: \t%i\n" 96 "s_bmaps: \t%i\n" 97 "s_bmaps_without_search: \t%i\n" 98 "s_direct2indirect: \t%i\n" 99 "s_indirect2direct: \t%i\n" 100 "\n" 101 "max_hash_collisions: \t%i\n" 102 "breads: \t%lu\n" 103 "bread_misses: \t%lu\n" 104 "search_by_key: \t%lu\n" 105 "search_by_key_fs_changed: \t%lu\n" 106 "search_by_key_restarted: \t%lu\n" 107 "insert_item_restarted: \t%lu\n" 108 "paste_into_item_restarted: \t%lu\n" 109 "cut_from_item_restarted: \t%lu\n" 110 "delete_solid_item_restarted: \t%lu\n" 111 "delete_item_restarted: \t%lu\n" 112 "leaked_oid: \t%lu\n" 113 "leaves_removable: \t%lu\n", 114 SF(s_mount_state) == REISERFS_VALID_FS ? 115 "REISERFS_VALID_FS" : "REISERFS_ERROR_FS", 116 reiserfs_r5_hash(sb) ? "FORCE_R5 " : "", 117 reiserfs_rupasov_hash(sb) ? "FORCE_RUPASOV " : "", 118 reiserfs_tea_hash(sb) ? "FORCE_TEA " : "", 119 reiserfs_hash_detect(sb) ? "DETECT_HASH " : "", 120 reiserfs_no_border(sb) ? "NO_BORDER " : "BORDER ", 121 reiserfs_no_unhashed_relocation(sb) ? 122 "NO_UNHASHED_RELOCATION " : "", 123 reiserfs_hashed_relocation(sb) ? "UNHASHED_RELOCATION " : "", 124 reiserfs_test4(sb) ? "TEST4 " : "", 125 have_large_tails(sb) ? "TAILS " : have_small_tails(sb) ? 126 "SMALL_TAILS " : "NO_TAILS ", 127 replay_only(sb) ? "REPLAY_ONLY " : "", 128 convert_reiserfs(sb) ? "CONV " : "", 129 atomic_read(&r->s_generation_counter), 130 SF(s_disk_reads), SF(s_disk_writes), SF(s_fix_nodes), 131 SF(s_do_balance), SF(s_unneeded_left_neighbor), 132 SF(s_good_search_by_key_reada), SF(s_bmaps), 133 SF(s_bmaps_without_search), SF(s_direct2indirect), 134 SF(s_indirect2direct), SFP(max_hash_collisions), SFP(breads), 135 SFP(bread_miss), SFP(search_by_key), 136 SFP(search_by_key_fs_changed), SFP(search_by_key_restarted), 137 SFP(insert_item_restarted), SFP(paste_into_item_restarted), 138 SFP(cut_from_item_restarted), 139 SFP(delete_solid_item_restarted), SFP(delete_item_restarted), 140 SFP(leaked_oid), SFP(leaves_removable)); 141 142 return 0; 143 } 144 145 static int show_per_level(struct seq_file *m, struct super_block *sb) 146 { 147 struct reiserfs_sb_info *r = REISERFS_SB(sb); 148 int level; 149 150 seq_printf(m, "level\t" 151 " balances" 152 " [sbk: reads" 153 " fs_changed" 154 " restarted]" 155 " free space" 156 " items" 157 " can_remove" 158 " lnum" 159 " rnum" 160 " lbytes" 161 " rbytes" 162 " get_neig" 163 " get_neig_res" " need_l_neig" " need_r_neig" "\n"); 164 165 for (level = 0; level < MAX_HEIGHT; ++level) { 166 seq_printf(m, "%i\t" 167 " %12lu" 168 " %12lu" 169 " %12lu" 170 " %12lu" 171 " %12lu" 172 " %12lu" 173 " %12lu" 174 " %12li" 175 " %12li" 176 " %12li" 177 " %12li" 178 " %12lu" 179 " %12lu" 180 " %12lu" 181 " %12lu" 182 "\n", 183 level, 184 SFPL(balance_at), 185 SFPL(sbk_read_at), 186 SFPL(sbk_fs_changed), 187 SFPL(sbk_restarted), 188 SFPL(free_at), 189 SFPL(items_at), 190 SFPL(can_node_be_removed), 191 SFPL(lnum), 192 SFPL(rnum), 193 SFPL(lbytes), 194 SFPL(rbytes), 195 SFPL(get_neighbors), 196 SFPL(get_neighbors_restart), 197 SFPL(need_l_neighbor), SFPL(need_r_neighbor) 198 ); 199 } 200 return 0; 201 } 202 203 static int show_bitmap(struct seq_file *m, struct super_block *sb) 204 { 205 struct reiserfs_sb_info *r = REISERFS_SB(sb); 206 207 seq_printf(m, "free_block: %lu\n" 208 " scan_bitmap:" 209 " wait" 210 " bmap" 211 " retry" 212 " stolen" 213 " journal_hint" 214 "journal_nohint" 215 "\n" 216 " %14lu" 217 " %14lu" 218 " %14lu" 219 " %14lu" 220 " %14lu" 221 " %14lu" 222 " %14lu" 223 "\n", 224 SFP(free_block), 225 SFPF(call), 226 SFPF(wait), 227 SFPF(bmap), 228 SFPF(retry), 229 SFPF(stolen), 230 SFPF(in_journal_hint), SFPF(in_journal_nohint)); 231 232 return 0; 233 } 234 235 static int show_on_disk_super(struct seq_file *m, struct super_block *sb) 236 { 237 struct reiserfs_sb_info *sb_info = REISERFS_SB(sb); 238 struct reiserfs_super_block *rs = sb_info->s_rs; 239 int hash_code = DFL(s_hash_function_code); 240 __u32 flags = DJF(s_flags); 241 242 seq_printf(m, "block_count: \t%i\n" 243 "free_blocks: \t%i\n" 244 "root_block: \t%i\n" 245 "blocksize: \t%i\n" 246 "oid_maxsize: \t%i\n" 247 "oid_cursize: \t%i\n" 248 "umount_state: \t%i\n" 249 "magic: \t%10.10s\n" 250 "fs_state: \t%i\n" 251 "hash: \t%s\n" 252 "tree_height: \t%i\n" 253 "bmap_nr: \t%i\n" 254 "version: \t%i\n" 255 "flags: \t%x[%s]\n" 256 "reserved_for_journal: \t%i\n", 257 DFL(s_block_count), 258 DFL(s_free_blocks), 259 DFL(s_root_block), 260 DF(s_blocksize), 261 DF(s_oid_maxsize), 262 DF(s_oid_cursize), 263 DF(s_umount_state), 264 rs->s_v1.s_magic, 265 DF(s_fs_state), 266 hash_code == TEA_HASH ? "tea" : 267 (hash_code == YURA_HASH) ? "rupasov" : 268 (hash_code == R5_HASH) ? "r5" : 269 (hash_code == UNSET_HASH) ? "unset" : "unknown", 270 DF(s_tree_height), 271 DF(s_bmap_nr), 272 DF(s_version), flags, (flags & reiserfs_attrs_cleared) 273 ? "attrs_cleared" : "", DF(s_reserved_for_journal)); 274 275 return 0; 276 } 277 278 static int show_oidmap(struct seq_file *m, struct super_block *sb) 279 { 280 struct reiserfs_sb_info *sb_info = REISERFS_SB(sb); 281 struct reiserfs_super_block *rs = sb_info->s_rs; 282 unsigned int mapsize = le16_to_cpu(rs->s_v1.s_oid_cursize); 283 unsigned long total_used = 0; 284 int i; 285 286 for (i = 0; i < mapsize; ++i) { 287 __u32 right; 288 289 right = (i == mapsize - 1) ? MAX_KEY_OBJECTID : MAP(i + 1); 290 seq_printf(m, "%s: [ %x .. %x )\n", 291 (i & 1) ? "free" : "used", MAP(i), right); 292 if (!(i & 1)) { 293 total_used += right - MAP(i); 294 } 295 } 296 #if defined( REISERFS_USE_OIDMAPF ) 297 if (sb_info->oidmap.use_file && (sb_info->oidmap.mapf != NULL)) { 298 loff_t size = sb_info->oidmap.mapf->f_dentry->d_inode->i_size; 299 total_used += size / sizeof(reiserfs_oidinterval_d_t); 300 } 301 #endif 302 seq_printf(m, "total: \t%i [%i/%i] used: %lu [exact]\n", 303 mapsize, 304 mapsize, le16_to_cpu(rs->s_v1.s_oid_maxsize), total_used); 305 return 0; 306 } 307 308 static int show_journal(struct seq_file *m, struct super_block *sb) 309 { 310 struct reiserfs_sb_info *r = REISERFS_SB(sb); 311 struct reiserfs_super_block *rs = r->s_rs; 312 struct journal_params *jp = &rs->s_v1.s_journal; 313 char b[BDEVNAME_SIZE]; 314 315 seq_printf(m, /* on-disk fields */ 316 "jp_journal_1st_block: \t%i\n" 317 "jp_journal_dev: \t%s[%x]\n" 318 "jp_journal_size: \t%i\n" 319 "jp_journal_trans_max: \t%i\n" 320 "jp_journal_magic: \t%i\n" 321 "jp_journal_max_batch: \t%i\n" 322 "jp_journal_max_commit_age: \t%i\n" 323 "jp_journal_max_trans_age: \t%i\n" 324 /* incore fields */ 325 "j_1st_reserved_block: \t%i\n" 326 "j_state: \t%li\n" 327 "j_trans_id: \t%lu\n" 328 "j_mount_id: \t%lu\n" 329 "j_start: \t%lu\n" 330 "j_len: \t%lu\n" 331 "j_len_alloc: \t%lu\n" 332 "j_wcount: \t%i\n" 333 "j_bcount: \t%lu\n" 334 "j_first_unflushed_offset: \t%lu\n" 335 "j_last_flush_trans_id: \t%lu\n" 336 "j_trans_start_time: \t%li\n" 337 "j_list_bitmap_index: \t%i\n" 338 "j_must_wait: \t%i\n" 339 "j_next_full_flush: \t%i\n" 340 "j_next_async_flush: \t%i\n" 341 "j_cnode_used: \t%i\n" "j_cnode_free: \t%i\n" "\n" 342 /* reiserfs_proc_info_data_t.journal fields */ 343 "in_journal: \t%12lu\n" 344 "in_journal_bitmap: \t%12lu\n" 345 "in_journal_reusable: \t%12lu\n" 346 "lock_journal: \t%12lu\n" 347 "lock_journal_wait: \t%12lu\n" 348 "journal_begin: \t%12lu\n" 349 "journal_relock_writers: \t%12lu\n" 350 "journal_relock_wcount: \t%12lu\n" 351 "mark_dirty: \t%12lu\n" 352 "mark_dirty_already: \t%12lu\n" 353 "mark_dirty_notjournal: \t%12lu\n" 354 "restore_prepared: \t%12lu\n" 355 "prepare: \t%12lu\n" 356 "prepare_retry: \t%12lu\n", 357 DJP(jp_journal_1st_block), 358 bdevname(SB_JOURNAL(sb)->j_dev_bd, b), 359 DJP(jp_journal_dev), 360 DJP(jp_journal_size), 361 DJP(jp_journal_trans_max), 362 DJP(jp_journal_magic), 363 DJP(jp_journal_max_batch), 364 SB_JOURNAL(sb)->j_max_commit_age, 365 DJP(jp_journal_max_trans_age), 366 JF(j_1st_reserved_block), 367 JF(j_state), 368 JF(j_trans_id), 369 JF(j_mount_id), 370 JF(j_start), 371 JF(j_len), 372 JF(j_len_alloc), 373 atomic_read(&r->s_journal->j_wcount), 374 JF(j_bcount), 375 JF(j_first_unflushed_offset), 376 JF(j_last_flush_trans_id), 377 JF(j_trans_start_time), 378 JF(j_list_bitmap_index), 379 JF(j_must_wait), 380 JF(j_next_full_flush), 381 JF(j_next_async_flush), 382 JF(j_cnode_used), 383 JF(j_cnode_free), 384 SFPJ(in_journal), 385 SFPJ(in_journal_bitmap), 386 SFPJ(in_journal_reusable), 387 SFPJ(lock_journal), 388 SFPJ(lock_journal_wait), 389 SFPJ(journal_being), 390 SFPJ(journal_relock_writers), 391 SFPJ(journal_relock_wcount), 392 SFPJ(mark_dirty), 393 SFPJ(mark_dirty_already), 394 SFPJ(mark_dirty_notjournal), 395 SFPJ(restore_prepared), SFPJ(prepare), SFPJ(prepare_retry) 396 ); 397 return 0; 398 } 399 400 /* iterator */ 401 static int test_sb(struct super_block *sb, void *data) 402 { 403 return data == sb; 404 } 405 406 static int set_sb(struct super_block *sb, void *data) 407 { 408 return -ENOENT; 409 } 410 411 static void *r_start(struct seq_file *m, loff_t * pos) 412 { 413 struct proc_dir_entry *de = m->private; 414 struct super_block *s = de->parent->data; 415 loff_t l = *pos; 416 417 if (l) 418 return NULL; 419 420 if (IS_ERR(sget(&reiserfs_fs_type, test_sb, set_sb, s))) 421 return NULL; 422 423 up_write(&s->s_umount); 424 425 if (de->deleted) { 426 deactivate_super(s); 427 return NULL; 428 } 429 430 return s; 431 } 432 433 static void *r_next(struct seq_file *m, void *v, loff_t * pos) 434 { 435 ++*pos; 436 if (v) 437 deactivate_super(v); 438 return NULL; 439 } 440 441 static void r_stop(struct seq_file *m, void *v) 442 { 443 if (v) 444 deactivate_super(v); 445 } 446 447 static int r_show(struct seq_file *m, void *v) 448 { 449 struct proc_dir_entry *de = m->private; 450 int (*show) (struct seq_file *, struct super_block *) = de->data; 451 return show(m, v); 452 } 453 454 static struct seq_operations r_ops = { 455 .start = r_start, 456 .next = r_next, 457 .stop = r_stop, 458 .show = r_show, 459 }; 460 461 static int r_open(struct inode *inode, struct file *file) 462 { 463 int ret = seq_open(file, &r_ops); 464 465 if (!ret) { 466 struct seq_file *m = file->private_data; 467 m->private = PDE(inode); 468 } 469 return ret; 470 } 471 472 static const struct file_operations r_file_operations = { 473 .open = r_open, 474 .read = seq_read, 475 .llseek = seq_lseek, 476 .release = seq_release, 477 }; 478 479 static struct proc_dir_entry *proc_info_root = NULL; 480 static const char proc_info_root_name[] = "fs/reiserfs"; 481 482 static void add_file(struct super_block *sb, char *name, 483 int (*func) (struct seq_file *, struct super_block *)) 484 { 485 struct proc_dir_entry *de; 486 de = create_proc_entry(name, 0, REISERFS_SB(sb)->procdir); 487 if (de) { 488 de->data = func; 489 de->proc_fops = &r_file_operations; 490 } 491 } 492 493 int reiserfs_proc_info_init(struct super_block *sb) 494 { 495 spin_lock_init(&__PINFO(sb).lock); 496 REISERFS_SB(sb)->procdir = 497 proc_mkdir(reiserfs_bdevname(sb), proc_info_root); 498 if (REISERFS_SB(sb)->procdir) { 499 REISERFS_SB(sb)->procdir->owner = THIS_MODULE; 500 REISERFS_SB(sb)->procdir->data = sb; 501 add_file(sb, "version", show_version); 502 add_file(sb, "super", show_super); 503 add_file(sb, "per-level", show_per_level); 504 add_file(sb, "bitmap", show_bitmap); 505 add_file(sb, "on-disk-super", show_on_disk_super); 506 add_file(sb, "oidmap", show_oidmap); 507 add_file(sb, "journal", show_journal); 508 return 0; 509 } 510 reiserfs_warning(sb, "reiserfs: cannot create /proc/%s/%s", 511 proc_info_root_name, reiserfs_bdevname(sb)); 512 return 1; 513 } 514 515 int reiserfs_proc_info_done(struct super_block *sb) 516 { 517 struct proc_dir_entry *de = REISERFS_SB(sb)->procdir; 518 if (de) { 519 remove_proc_entry("journal", de); 520 remove_proc_entry("oidmap", de); 521 remove_proc_entry("on-disk-super", de); 522 remove_proc_entry("bitmap", de); 523 remove_proc_entry("per-level", de); 524 remove_proc_entry("super", de); 525 remove_proc_entry("version", de); 526 } 527 spin_lock(&__PINFO(sb).lock); 528 __PINFO(sb).exiting = 1; 529 spin_unlock(&__PINFO(sb).lock); 530 if (proc_info_root) { 531 remove_proc_entry(reiserfs_bdevname(sb), proc_info_root); 532 REISERFS_SB(sb)->procdir = NULL; 533 } 534 return 0; 535 } 536 537 struct proc_dir_entry *reiserfs_proc_register_global(char *name, 538 read_proc_t * func) 539 { 540 return (proc_info_root) ? create_proc_read_entry(name, 0, 541 proc_info_root, 542 func, NULL) : NULL; 543 } 544 545 void reiserfs_proc_unregister_global(const char *name) 546 { 547 remove_proc_entry(name, proc_info_root); 548 } 549 550 int reiserfs_proc_info_global_init(void) 551 { 552 if (proc_info_root == NULL) { 553 proc_info_root = proc_mkdir(proc_info_root_name, NULL); 554 if (proc_info_root) { 555 proc_info_root->owner = THIS_MODULE; 556 } else { 557 reiserfs_warning(NULL, 558 "reiserfs: cannot create /proc/%s", 559 proc_info_root_name); 560 return 1; 561 } 562 } 563 return 0; 564 } 565 566 int reiserfs_proc_info_global_done(void) 567 { 568 if (proc_info_root != NULL) { 569 proc_info_root = NULL; 570 remove_proc_entry(proc_info_root_name, NULL); 571 } 572 return 0; 573 } 574 575 /* REISERFS_PROC_INFO */ 576 #else 577 578 int reiserfs_proc_info_init(struct super_block *sb) 579 { 580 return 0; 581 } 582 int reiserfs_proc_info_done(struct super_block *sb) 583 { 584 return 0; 585 } 586 587 struct proc_dir_entry *reiserfs_proc_register_global(char *name, 588 read_proc_t * func) 589 { 590 return NULL; 591 } 592 593 void reiserfs_proc_unregister_global(const char *name) 594 {; 595 } 596 597 int reiserfs_proc_info_global_init(void) 598 { 599 return 0; 600 } 601 int reiserfs_proc_info_global_done(void) 602 { 603 return 0; 604 } 605 606 int reiserfs_global_version_in_proc(char *buffer, char **start, 607 off_t offset, 608 int count, int *eof, void *data) 609 { 610 return 0; 611 } 612 613 /* REISERFS_PROC_INFO */ 614 #endif 615 616 /* 617 * $Log: procfs.c,v $ 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