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/config.h> 14 #include <linux/module.h> 15 #include <linux/time.h> 16 #include <linux/seq_file.h> 17 #include <asm/uaccess.h> 18 #include <linux/reiserfs_fs.h> 19 #include <linux/reiserfs_fs_sb.h> 20 #include <linux/smp_lock.h> 21 #include <linux/init.h> 22 #include <linux/proc_fs.h> 23 24 #if defined( REISERFS_PROC_INFO ) 25 26 /* 27 * LOCKING: 28 * 29 * We rely on new Alexander Viro's super-block locking. 30 * 31 */ 32 33 static int show_version(struct seq_file *m, struct super_block *sb) 34 { 35 char *format; 36 37 if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_6)) { 38 format = "3.6"; 39 } else if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_5)) { 40 format = "3.5"; 41 } else { 42 format = "unknown"; 43 } 44 45 seq_printf(m, "%s format\twith checks %s\n", format, 46 #if defined( CONFIG_REISERFS_CHECK ) 47 "on" 48 #else 49 "off" 50 #endif 51 ); 52 return 0; 53 } 54 55 int reiserfs_global_version_in_proc(char *buffer, char **start, off_t offset, 56 int count, int *eof, void *data) 57 { 58 *start = buffer; 59 *eof = 1; 60 return 0; 61 } 62 63 #define SF( x ) ( r -> x ) 64 #define SFP( x ) SF( s_proc_info_data.x ) 65 #define SFPL( x ) SFP( x[ level ] ) 66 #define SFPF( x ) SFP( scan_bitmap.x ) 67 #define SFPJ( x ) SFP( journal.x ) 68 69 #define D2C( x ) le16_to_cpu( x ) 70 #define D4C( x ) le32_to_cpu( x ) 71 #define DF( x ) D2C( rs -> s_v1.x ) 72 #define DFL( x ) D4C( rs -> s_v1.x ) 73 74 #define objectid_map( s, rs ) (old_format_only (s) ? \ 75 (__le32 *)((struct reiserfs_super_block_v1 *)rs + 1) : \ 76 (__le32 *)(rs + 1)) 77 #define MAP( i ) D4C( objectid_map( sb, rs )[ i ] ) 78 79 #define DJF( x ) le32_to_cpu( rs -> x ) 80 #define DJV( x ) le32_to_cpu( s_v1 -> x ) 81 #define DJP( x ) le32_to_cpu( jp -> x ) 82 #define JF( x ) ( r -> s_journal -> x ) 83 84 static int show_super(struct seq_file *m, struct super_block *sb) 85 { 86 struct reiserfs_sb_info *r = REISERFS_SB(sb); 87 88 seq_printf(m, "state: \t%s\n" 89 "mount options: \t%s%s%s%s%s%s%s%s%s%s%s\n" 90 "gen. counter: \t%i\n" 91 "s_disk_reads: \t%i\n" 92 "s_disk_writes: \t%i\n" 93 "s_fix_nodes: \t%i\n" 94 "s_do_balance: \t%i\n" 95 "s_unneeded_left_neighbor: \t%i\n" 96 "s_good_search_by_key_reada: \t%i\n" 97 "s_bmaps: \t%i\n" 98 "s_bmaps_without_search: \t%i\n" 99 "s_direct2indirect: \t%i\n" 100 "s_indirect2direct: \t%i\n" 101 "\n" 102 "max_hash_collisions: \t%i\n" 103 "breads: \t%lu\n" 104 "bread_misses: \t%lu\n" 105 "search_by_key: \t%lu\n" 106 "search_by_key_fs_changed: \t%lu\n" 107 "search_by_key_restarted: \t%lu\n" 108 "insert_item_restarted: \t%lu\n" 109 "paste_into_item_restarted: \t%lu\n" 110 "cut_from_item_restarted: \t%lu\n" 111 "delete_solid_item_restarted: \t%lu\n" 112 "delete_item_restarted: \t%lu\n" 113 "leaked_oid: \t%lu\n" 114 "leaves_removable: \t%lu\n", 115 SF(s_mount_state) == REISERFS_VALID_FS ? 116 "REISERFS_VALID_FS" : "REISERFS_ERROR_FS", 117 reiserfs_r5_hash(sb) ? "FORCE_R5 " : "", 118 reiserfs_rupasov_hash(sb) ? "FORCE_RUPASOV " : "", 119 reiserfs_tea_hash(sb) ? "FORCE_TEA " : "", 120 reiserfs_hash_detect(sb) ? "DETECT_HASH " : "", 121 reiserfs_no_border(sb) ? "NO_BORDER " : "BORDER ", 122 reiserfs_no_unhashed_relocation(sb) ? 123 "NO_UNHASHED_RELOCATION " : "", 124 reiserfs_hashed_relocation(sb) ? "UNHASHED_RELOCATION " : "", 125 reiserfs_test4(sb) ? "TEST4 " : "", 126 have_large_tails(sb) ? "TAILS " : have_small_tails(sb) ? 127 "SMALL_TAILS " : "NO_TAILS ", 128 replay_only(sb) ? "REPLAY_ONLY " : "", 129 convert_reiserfs(sb) ? "CONV " : "", 130 atomic_read(&r->s_generation_counter), 131 SF(s_disk_reads), SF(s_disk_writes), SF(s_fix_nodes), 132 SF(s_do_balance), SF(s_unneeded_left_neighbor), 133 SF(s_good_search_by_key_reada), SF(s_bmaps), 134 SF(s_bmaps_without_search), SF(s_direct2indirect), 135 SF(s_indirect2direct), SFP(max_hash_collisions), SFP(breads), 136 SFP(bread_miss), SFP(search_by_key), 137 SFP(search_by_key_fs_changed), SFP(search_by_key_restarted), 138 SFP(insert_item_restarted), SFP(paste_into_item_restarted), 139 SFP(cut_from_item_restarted), 140 SFP(delete_solid_item_restarted), SFP(delete_item_restarted), 141 SFP(leaked_oid), SFP(leaves_removable)); 142 143 return 0; 144 } 145 146 static int show_per_level(struct seq_file *m, struct super_block *sb) 147 { 148 struct reiserfs_sb_info *r = REISERFS_SB(sb); 149 int level; 150 151 seq_printf(m, "level\t" 152 " balances" 153 " [sbk: reads" 154 " fs_changed" 155 " restarted]" 156 " free space" 157 " items" 158 " can_remove" 159 " lnum" 160 " rnum" 161 " lbytes" 162 " rbytes" 163 " get_neig" 164 " get_neig_res" " need_l_neig" " need_r_neig" "\n"); 165 166 for (level = 0; level < MAX_HEIGHT; ++level) { 167 seq_printf(m, "%i\t" 168 " %12lu" 169 " %12lu" 170 " %12lu" 171 " %12lu" 172 " %12lu" 173 " %12lu" 174 " %12lu" 175 " %12li" 176 " %12li" 177 " %12li" 178 " %12li" 179 " %12lu" 180 " %12lu" 181 " %12lu" 182 " %12lu" 183 "\n", 184 level, 185 SFPL(balance_at), 186 SFPL(sbk_read_at), 187 SFPL(sbk_fs_changed), 188 SFPL(sbk_restarted), 189 SFPL(free_at), 190 SFPL(items_at), 191 SFPL(can_node_be_removed), 192 SFPL(lnum), 193 SFPL(rnum), 194 SFPL(lbytes), 195 SFPL(rbytes), 196 SFPL(get_neighbors), 197 SFPL(get_neighbors_restart), 198 SFPL(need_l_neighbor), SFPL(need_r_neighbor) 199 ); 200 } 201 return 0; 202 } 203 204 static int show_bitmap(struct seq_file *m, struct super_block *sb) 205 { 206 struct reiserfs_sb_info *r = REISERFS_SB(sb); 207 208 seq_printf(m, "free_block: %lu\n" 209 " scan_bitmap:" 210 " wait" 211 " bmap" 212 " retry" 213 " stolen" 214 " journal_hint" 215 "journal_nohint" 216 "\n" 217 " %14lu" 218 " %14lu" 219 " %14lu" 220 " %14lu" 221 " %14lu" 222 " %14lu" 223 " %14lu" 224 "\n", 225 SFP(free_block), 226 SFPF(call), 227 SFPF(wait), 228 SFPF(bmap), 229 SFPF(retry), 230 SFPF(stolen), 231 SFPF(in_journal_hint), SFPF(in_journal_nohint)); 232 233 return 0; 234 } 235 236 static int show_on_disk_super(struct seq_file *m, struct super_block *sb) 237 { 238 struct reiserfs_sb_info *sb_info = REISERFS_SB(sb); 239 struct reiserfs_super_block *rs = sb_info->s_rs; 240 int hash_code = DFL(s_hash_function_code); 241 __u32 flags = DJF(s_flags); 242 243 seq_printf(m, "block_count: \t%i\n" 244 "free_blocks: \t%i\n" 245 "root_block: \t%i\n" 246 "blocksize: \t%i\n" 247 "oid_maxsize: \t%i\n" 248 "oid_cursize: \t%i\n" 249 "umount_state: \t%i\n" 250 "magic: \t%10.10s\n" 251 "fs_state: \t%i\n" 252 "hash: \t%s\n" 253 "tree_height: \t%i\n" 254 "bmap_nr: \t%i\n" 255 "version: \t%i\n" 256 "flags: \t%x[%s]\n" 257 "reserved_for_journal: \t%i\n", 258 DFL(s_block_count), 259 DFL(s_free_blocks), 260 DFL(s_root_block), 261 DF(s_blocksize), 262 DF(s_oid_maxsize), 263 DF(s_oid_cursize), 264 DF(s_umount_state), 265 rs->s_v1.s_magic, 266 DF(s_fs_state), 267 hash_code == TEA_HASH ? "tea" : 268 (hash_code == YURA_HASH) ? "rupasov" : 269 (hash_code == R5_HASH) ? "r5" : 270 (hash_code == UNSET_HASH) ? "unset" : "unknown", 271 DF(s_tree_height), 272 DF(s_bmap_nr), 273 DF(s_version), flags, (flags & reiserfs_attrs_cleared) 274 ? "attrs_cleared" : "", DF(s_reserved_for_journal)); 275 276 return 0; 277 } 278 279 static int show_oidmap(struct seq_file *m, struct super_block *sb) 280 { 281 struct reiserfs_sb_info *sb_info = REISERFS_SB(sb); 282 struct reiserfs_super_block *rs = sb_info->s_rs; 283 unsigned int mapsize = le16_to_cpu(rs->s_v1.s_oid_cursize); 284 unsigned long total_used = 0; 285 int i; 286 287 for (i = 0; i < mapsize; ++i) { 288 __u32 right; 289 290 right = (i == mapsize - 1) ? MAX_KEY_OBJECTID : MAP(i + 1); 291 seq_printf(m, "%s: [ %x .. %x )\n", 292 (i & 1) ? "free" : "used", MAP(i), right); 293 if (!(i & 1)) { 294 total_used += right - MAP(i); 295 } 296 } 297 #if defined( REISERFS_USE_OIDMAPF ) 298 if (sb_info->oidmap.use_file && (sb_info->oidmap.mapf != NULL)) { 299 loff_t size = sb_info->oidmap.mapf->f_dentry->d_inode->i_size; 300 total_used += size / sizeof(reiserfs_oidinterval_d_t); 301 } 302 #endif 303 seq_printf(m, "total: \t%i [%i/%i] used: %lu [exact]\n", 304 mapsize, 305 mapsize, le16_to_cpu(rs->s_v1.s_oid_maxsize), total_used); 306 return 0; 307 } 308 309 static int show_journal(struct seq_file *m, struct super_block *sb) 310 { 311 struct reiserfs_sb_info *r = REISERFS_SB(sb); 312 struct reiserfs_super_block *rs = r->s_rs; 313 struct journal_params *jp = &rs->s_v1.s_journal; 314 char b[BDEVNAME_SIZE]; 315 316 seq_printf(m, /* on-disk fields */ 317 "jp_journal_1st_block: \t%i\n" 318 "jp_journal_dev: \t%s[%x]\n" 319 "jp_journal_size: \t%i\n" 320 "jp_journal_trans_max: \t%i\n" 321 "jp_journal_magic: \t%i\n" 322 "jp_journal_max_batch: \t%i\n" 323 "jp_journal_max_commit_age: \t%i\n" 324 "jp_journal_max_trans_age: \t%i\n" 325 /* incore fields */ 326 "j_1st_reserved_block: \t%i\n" 327 "j_state: \t%li\n" 328 "j_trans_id: \t%lu\n" 329 "j_mount_id: \t%lu\n" 330 "j_start: \t%lu\n" 331 "j_len: \t%lu\n" 332 "j_len_alloc: \t%lu\n" 333 "j_wcount: \t%i\n" 334 "j_bcount: \t%lu\n" 335 "j_first_unflushed_offset: \t%lu\n" 336 "j_last_flush_trans_id: \t%lu\n" 337 "j_trans_start_time: \t%li\n" 338 "j_list_bitmap_index: \t%i\n" 339 "j_must_wait: \t%i\n" 340 "j_next_full_flush: \t%i\n" 341 "j_next_async_flush: \t%i\n" 342 "j_cnode_used: \t%i\n" "j_cnode_free: \t%i\n" "\n" 343 /* reiserfs_proc_info_data_t.journal fields */ 344 "in_journal: \t%12lu\n" 345 "in_journal_bitmap: \t%12lu\n" 346 "in_journal_reusable: \t%12lu\n" 347 "lock_journal: \t%12lu\n" 348 "lock_journal_wait: \t%12lu\n" 349 "journal_begin: \t%12lu\n" 350 "journal_relock_writers: \t%12lu\n" 351 "journal_relock_wcount: \t%12lu\n" 352 "mark_dirty: \t%12lu\n" 353 "mark_dirty_already: \t%12lu\n" 354 "mark_dirty_notjournal: \t%12lu\n" 355 "restore_prepared: \t%12lu\n" 356 "prepare: \t%12lu\n" 357 "prepare_retry: \t%12lu\n", 358 DJP(jp_journal_1st_block), 359 bdevname(SB_JOURNAL(sb)->j_dev_bd, b), 360 DJP(jp_journal_dev), 361 DJP(jp_journal_size), 362 DJP(jp_journal_trans_max), 363 DJP(jp_journal_magic), 364 DJP(jp_journal_max_batch), 365 SB_JOURNAL(sb)->j_max_commit_age, 366 DJP(jp_journal_max_trans_age), 367 JF(j_1st_reserved_block), 368 JF(j_state), 369 JF(j_trans_id), 370 JF(j_mount_id), 371 JF(j_start), 372 JF(j_len), 373 JF(j_len_alloc), 374 atomic_read(&r->s_journal->j_wcount), 375 JF(j_bcount), 376 JF(j_first_unflushed_offset), 377 JF(j_last_flush_trans_id), 378 JF(j_trans_start_time), 379 JF(j_list_bitmap_index), 380 JF(j_must_wait), 381 JF(j_next_full_flush), 382 JF(j_next_async_flush), 383 JF(j_cnode_used), 384 JF(j_cnode_free), 385 SFPJ(in_journal), 386 SFPJ(in_journal_bitmap), 387 SFPJ(in_journal_reusable), 388 SFPJ(lock_journal), 389 SFPJ(lock_journal_wait), 390 SFPJ(journal_being), 391 SFPJ(journal_relock_writers), 392 SFPJ(journal_relock_wcount), 393 SFPJ(mark_dirty), 394 SFPJ(mark_dirty_already), 395 SFPJ(mark_dirty_notjournal), 396 SFPJ(restore_prepared), SFPJ(prepare), SFPJ(prepare_retry) 397 ); 398 return 0; 399 } 400 401 /* iterator */ 402 static int test_sb(struct super_block *sb, void *data) 403 { 404 return data == sb; 405 } 406 407 static int set_sb(struct super_block *sb, void *data) 408 { 409 return -ENOENT; 410 } 411 412 static void *r_start(struct seq_file *m, loff_t * pos) 413 { 414 struct proc_dir_entry *de = m->private; 415 struct super_block *s = de->parent->data; 416 loff_t l = *pos; 417 418 if (l) 419 return NULL; 420 421 if (IS_ERR(sget(&reiserfs_fs_type, test_sb, set_sb, s))) 422 return NULL; 423 424 up_write(&s->s_umount); 425 426 if (de->deleted) { 427 deactivate_super(s); 428 return NULL; 429 } 430 431 return s; 432 } 433 434 static void *r_next(struct seq_file *m, void *v, loff_t * pos) 435 { 436 ++*pos; 437 if (v) 438 deactivate_super(v); 439 return NULL; 440 } 441 442 static void r_stop(struct seq_file *m, void *v) 443 { 444 if (v) 445 deactivate_super(v); 446 } 447 448 static int r_show(struct seq_file *m, void *v) 449 { 450 struct proc_dir_entry *de = m->private; 451 int (*show) (struct seq_file *, struct super_block *) = de->data; 452 return show(m, v); 453 } 454 455 static struct seq_operations r_ops = { 456 .start = r_start, 457 .next = r_next, 458 .stop = r_stop, 459 .show = r_show, 460 }; 461 462 static int r_open(struct inode *inode, struct file *file) 463 { 464 int ret = seq_open(file, &r_ops); 465 466 if (!ret) { 467 struct seq_file *m = file->private_data; 468 m->private = PDE(inode); 469 } 470 return ret; 471 } 472 473 static const struct file_operations r_file_operations = { 474 .open = r_open, 475 .read = seq_read, 476 .llseek = seq_lseek, 477 .release = seq_release, 478 }; 479 480 static struct proc_dir_entry *proc_info_root = NULL; 481 static const char proc_info_root_name[] = "fs/reiserfs"; 482 483 static void add_file(struct super_block *sb, char *name, 484 int (*func) (struct seq_file *, struct super_block *)) 485 { 486 struct proc_dir_entry *de; 487 de = create_proc_entry(name, 0, REISERFS_SB(sb)->procdir); 488 if (de) { 489 de->data = func; 490 de->proc_fops = &r_file_operations; 491 } 492 } 493 494 int reiserfs_proc_info_init(struct super_block *sb) 495 { 496 spin_lock_init(&__PINFO(sb).lock); 497 REISERFS_SB(sb)->procdir = 498 proc_mkdir(reiserfs_bdevname(sb), proc_info_root); 499 if (REISERFS_SB(sb)->procdir) { 500 REISERFS_SB(sb)->procdir->owner = THIS_MODULE; 501 REISERFS_SB(sb)->procdir->data = sb; 502 add_file(sb, "version", show_version); 503 add_file(sb, "super", show_super); 504 add_file(sb, "per-level", show_per_level); 505 add_file(sb, "bitmap", show_bitmap); 506 add_file(sb, "on-disk-super", show_on_disk_super); 507 add_file(sb, "oidmap", show_oidmap); 508 add_file(sb, "journal", show_journal); 509 return 0; 510 } 511 reiserfs_warning(sb, "reiserfs: cannot create /proc/%s/%s", 512 proc_info_root_name, reiserfs_bdevname(sb)); 513 return 1; 514 } 515 516 int reiserfs_proc_info_done(struct super_block *sb) 517 { 518 struct proc_dir_entry *de = REISERFS_SB(sb)->procdir; 519 if (de) { 520 remove_proc_entry("journal", de); 521 remove_proc_entry("oidmap", de); 522 remove_proc_entry("on-disk-super", de); 523 remove_proc_entry("bitmap", de); 524 remove_proc_entry("per-level", de); 525 remove_proc_entry("super", de); 526 remove_proc_entry("version", de); 527 } 528 spin_lock(&__PINFO(sb).lock); 529 __PINFO(sb).exiting = 1; 530 spin_unlock(&__PINFO(sb).lock); 531 if (proc_info_root) { 532 remove_proc_entry(reiserfs_bdevname(sb), proc_info_root); 533 REISERFS_SB(sb)->procdir = NULL; 534 } 535 return 0; 536 } 537 538 struct proc_dir_entry *reiserfs_proc_register_global(char *name, 539 read_proc_t * func) 540 { 541 return (proc_info_root) ? create_proc_read_entry(name, 0, 542 proc_info_root, 543 func, NULL) : NULL; 544 } 545 546 void reiserfs_proc_unregister_global(const char *name) 547 { 548 remove_proc_entry(name, proc_info_root); 549 } 550 551 int reiserfs_proc_info_global_init(void) 552 { 553 if (proc_info_root == NULL) { 554 proc_info_root = proc_mkdir(proc_info_root_name, NULL); 555 if (proc_info_root) { 556 proc_info_root->owner = THIS_MODULE; 557 } else { 558 reiserfs_warning(NULL, 559 "reiserfs: 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 * $Log: procfs.c,v $ 619 * Revision 1.1.8.2 2001/07/15 17:08:42 god 620 * . use get_super() in procfs.c 621 * . remove remove_save_link() from reiserfs_do_truncate() 622 * 623 * I accept terms and conditions stated in the Legal Agreement 624 * (available at http://www.namesys.com/legalese.html) 625 * 626 * Revision 1.1.8.1 2001/07/11 16:48:50 god 627 * proc info support 628 * 629 * I accept terms and conditions stated in the Legal Agreement 630 * (available at http://www.namesys.com/legalese.html) 631 * 632 */ 633 634 /* 635 * Make Linus happy. 636 * Local variables: 637 * c-indentation-style: "K&R" 638 * mode-name: "LC" 639 * c-basic-offset: 8 640 * tab-width: 8 641 * End: 642 */ 643