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_kmallocs: \t%i\n" 92 "s_disk_reads: \t%i\n" 93 "s_disk_writes: \t%i\n" 94 "s_fix_nodes: \t%i\n" 95 "s_do_balance: \t%i\n" 96 "s_unneeded_left_neighbor: \t%i\n" 97 "s_good_search_by_key_reada: \t%i\n" 98 "s_bmaps: \t%i\n" 99 "s_bmaps_without_search: \t%i\n" 100 "s_direct2indirect: \t%i\n" 101 "s_indirect2direct: \t%i\n" 102 "\n" 103 "max_hash_collisions: \t%i\n" 104 "breads: \t%lu\n" 105 "bread_misses: \t%lu\n" 106 "search_by_key: \t%lu\n" 107 "search_by_key_fs_changed: \t%lu\n" 108 "search_by_key_restarted: \t%lu\n" 109 "insert_item_restarted: \t%lu\n" 110 "paste_into_item_restarted: \t%lu\n" 111 "cut_from_item_restarted: \t%lu\n" 112 "delete_solid_item_restarted: \t%lu\n" 113 "delete_item_restarted: \t%lu\n" 114 "leaked_oid: \t%lu\n" 115 "leaves_removable: \t%lu\n", 116 SF(s_mount_state) == REISERFS_VALID_FS ? 117 "REISERFS_VALID_FS" : "REISERFS_ERROR_FS", 118 reiserfs_r5_hash(sb) ? "FORCE_R5 " : "", 119 reiserfs_rupasov_hash(sb) ? "FORCE_RUPASOV " : "", 120 reiserfs_tea_hash(sb) ? "FORCE_TEA " : "", 121 reiserfs_hash_detect(sb) ? "DETECT_HASH " : "", 122 reiserfs_no_border(sb) ? "NO_BORDER " : "BORDER ", 123 reiserfs_no_unhashed_relocation(sb) ? 124 "NO_UNHASHED_RELOCATION " : "", 125 reiserfs_hashed_relocation(sb) ? "UNHASHED_RELOCATION " : "", 126 reiserfs_test4(sb) ? "TEST4 " : "", 127 have_large_tails(sb) ? "TAILS " : have_small_tails(sb) ? 128 "SMALL_TAILS " : "NO_TAILS ", 129 replay_only(sb) ? "REPLAY_ONLY " : "", 130 convert_reiserfs(sb) ? "CONV " : "", 131 atomic_read(&r->s_generation_counter), SF(s_kmallocs), 132 SF(s_disk_reads), SF(s_disk_writes), SF(s_fix_nodes), 133 SF(s_do_balance), SF(s_unneeded_left_neighbor), 134 SF(s_good_search_by_key_reada), SF(s_bmaps), 135 SF(s_bmaps_without_search), SF(s_direct2indirect), 136 SF(s_indirect2direct), SFP(max_hash_collisions), SFP(breads), 137 SFP(bread_miss), SFP(search_by_key), 138 SFP(search_by_key_fs_changed), SFP(search_by_key_restarted), 139 SFP(insert_item_restarted), SFP(paste_into_item_restarted), 140 SFP(cut_from_item_restarted), 141 SFP(delete_solid_item_restarted), SFP(delete_item_restarted), 142 SFP(leaked_oid), SFP(leaves_removable)); 143 144 return 0; 145 } 146 147 static int show_per_level(struct seq_file *m, struct super_block *sb) 148 { 149 struct reiserfs_sb_info *r = REISERFS_SB(sb); 150 int level; 151 152 seq_printf(m, "level\t" 153 " balances" 154 " [sbk: reads" 155 " fs_changed" 156 " restarted]" 157 " free space" 158 " items" 159 " can_remove" 160 " lnum" 161 " rnum" 162 " lbytes" 163 " rbytes" 164 " get_neig" 165 " get_neig_res" " need_l_neig" " need_r_neig" "\n"); 166 167 for (level = 0; level < MAX_HEIGHT; ++level) { 168 seq_printf(m, "%i\t" 169 " %12lu" 170 " %12lu" 171 " %12lu" 172 " %12lu" 173 " %12lu" 174 " %12lu" 175 " %12lu" 176 " %12li" 177 " %12li" 178 " %12li" 179 " %12li" 180 " %12lu" 181 " %12lu" 182 " %12lu" 183 " %12lu" 184 "\n", 185 level, 186 SFPL(balance_at), 187 SFPL(sbk_read_at), 188 SFPL(sbk_fs_changed), 189 SFPL(sbk_restarted), 190 SFPL(free_at), 191 SFPL(items_at), 192 SFPL(can_node_be_removed), 193 SFPL(lnum), 194 SFPL(rnum), 195 SFPL(lbytes), 196 SFPL(rbytes), 197 SFPL(get_neighbors), 198 SFPL(get_neighbors_restart), 199 SFPL(need_l_neighbor), SFPL(need_r_neighbor) 200 ); 201 } 202 return 0; 203 } 204 205 static int show_bitmap(struct seq_file *m, struct super_block *sb) 206 { 207 struct reiserfs_sb_info *r = REISERFS_SB(sb); 208 209 seq_printf(m, "free_block: %lu\n" 210 " scan_bitmap:" 211 " wait" 212 " bmap" 213 " retry" 214 " stolen" 215 " journal_hint" 216 "journal_nohint" 217 "\n" 218 " %14lu" 219 " %14lu" 220 " %14lu" 221 " %14lu" 222 " %14lu" 223 " %14lu" 224 " %14lu" 225 "\n", 226 SFP(free_block), 227 SFPF(call), 228 SFPF(wait), 229 SFPF(bmap), 230 SFPF(retry), 231 SFPF(stolen), 232 SFPF(in_journal_hint), SFPF(in_journal_nohint)); 233 234 return 0; 235 } 236 237 static int show_on_disk_super(struct seq_file *m, struct super_block *sb) 238 { 239 struct reiserfs_sb_info *sb_info = REISERFS_SB(sb); 240 struct reiserfs_super_block *rs = sb_info->s_rs; 241 int hash_code = DFL(s_hash_function_code); 242 __u32 flags = DJF(s_flags); 243 244 seq_printf(m, "block_count: \t%i\n" 245 "free_blocks: \t%i\n" 246 "root_block: \t%i\n" 247 "blocksize: \t%i\n" 248 "oid_maxsize: \t%i\n" 249 "oid_cursize: \t%i\n" 250 "umount_state: \t%i\n" 251 "magic: \t%10.10s\n" 252 "fs_state: \t%i\n" 253 "hash: \t%s\n" 254 "tree_height: \t%i\n" 255 "bmap_nr: \t%i\n" 256 "version: \t%i\n" 257 "flags: \t%x[%s]\n" 258 "reserved_for_journal: \t%i\n", 259 DFL(s_block_count), 260 DFL(s_free_blocks), 261 DFL(s_root_block), 262 DF(s_blocksize), 263 DF(s_oid_maxsize), 264 DF(s_oid_cursize), 265 DF(s_umount_state), 266 rs->s_v1.s_magic, 267 DF(s_fs_state), 268 hash_code == TEA_HASH ? "tea" : 269 (hash_code == YURA_HASH) ? "rupasov" : 270 (hash_code == R5_HASH) ? "r5" : 271 (hash_code == UNSET_HASH) ? "unset" : "unknown", 272 DF(s_tree_height), 273 DF(s_bmap_nr), 274 DF(s_version), flags, (flags & reiserfs_attrs_cleared) 275 ? "attrs_cleared" : "", DF(s_reserved_for_journal)); 276 277 return 0; 278 } 279 280 static int show_oidmap(struct seq_file *m, struct super_block *sb) 281 { 282 struct reiserfs_sb_info *sb_info = REISERFS_SB(sb); 283 struct reiserfs_super_block *rs = sb_info->s_rs; 284 unsigned int mapsize = le16_to_cpu(rs->s_v1.s_oid_cursize); 285 unsigned long total_used = 0; 286 int i; 287 288 for (i = 0; i < mapsize; ++i) { 289 __u32 right; 290 291 right = (i == mapsize - 1) ? MAX_KEY_OBJECTID : MAP(i + 1); 292 seq_printf(m, "%s: [ %x .. %x )\n", 293 (i & 1) ? "free" : "used", MAP(i), right); 294 if (!(i & 1)) { 295 total_used += right - MAP(i); 296 } 297 } 298 #if defined( REISERFS_USE_OIDMAPF ) 299 if (sb_info->oidmap.use_file && (sb_info->oidmap.mapf != NULL)) { 300 loff_t size = sb_info->oidmap.mapf->f_dentry->d_inode->i_size; 301 total_used += size / sizeof(reiserfs_oidinterval_d_t); 302 } 303 #endif 304 seq_printf(m, "total: \t%i [%i/%i] used: %lu [exact]\n", 305 mapsize, 306 mapsize, le16_to_cpu(rs->s_v1.s_oid_maxsize), total_used); 307 return 0; 308 } 309 310 static int show_journal(struct seq_file *m, struct super_block *sb) 311 { 312 struct reiserfs_sb_info *r = REISERFS_SB(sb); 313 struct reiserfs_super_block *rs = r->s_rs; 314 struct journal_params *jp = &rs->s_v1.s_journal; 315 char b[BDEVNAME_SIZE]; 316 317 seq_printf(m, /* on-disk fields */ 318 "jp_journal_1st_block: \t%i\n" 319 "jp_journal_dev: \t%s[%x]\n" 320 "jp_journal_size: \t%i\n" 321 "jp_journal_trans_max: \t%i\n" 322 "jp_journal_magic: \t%i\n" 323 "jp_journal_max_batch: \t%i\n" 324 "jp_journal_max_commit_age: \t%i\n" 325 "jp_journal_max_trans_age: \t%i\n" 326 /* incore fields */ 327 "j_1st_reserved_block: \t%i\n" 328 "j_state: \t%li\n" 329 "j_trans_id: \t%lu\n" 330 "j_mount_id: \t%lu\n" 331 "j_start: \t%lu\n" 332 "j_len: \t%lu\n" 333 "j_len_alloc: \t%lu\n" 334 "j_wcount: \t%i\n" 335 "j_bcount: \t%lu\n" 336 "j_first_unflushed_offset: \t%lu\n" 337 "j_last_flush_trans_id: \t%lu\n" 338 "j_trans_start_time: \t%li\n" 339 "j_list_bitmap_index: \t%i\n" 340 "j_must_wait: \t%i\n" 341 "j_next_full_flush: \t%i\n" 342 "j_next_async_flush: \t%i\n" 343 "j_cnode_used: \t%i\n" "j_cnode_free: \t%i\n" "\n" 344 /* reiserfs_proc_info_data_t.journal fields */ 345 "in_journal: \t%12lu\n" 346 "in_journal_bitmap: \t%12lu\n" 347 "in_journal_reusable: \t%12lu\n" 348 "lock_journal: \t%12lu\n" 349 "lock_journal_wait: \t%12lu\n" 350 "journal_begin: \t%12lu\n" 351 "journal_relock_writers: \t%12lu\n" 352 "journal_relock_wcount: \t%12lu\n" 353 "mark_dirty: \t%12lu\n" 354 "mark_dirty_already: \t%12lu\n" 355 "mark_dirty_notjournal: \t%12lu\n" 356 "restore_prepared: \t%12lu\n" 357 "prepare: \t%12lu\n" 358 "prepare_retry: \t%12lu\n", 359 DJP(jp_journal_1st_block), 360 bdevname(SB_JOURNAL(sb)->j_dev_bd, b), 361 DJP(jp_journal_dev), 362 DJP(jp_journal_size), 363 DJP(jp_journal_trans_max), 364 DJP(jp_journal_magic), 365 DJP(jp_journal_max_batch), 366 SB_JOURNAL(sb)->j_max_commit_age, 367 DJP(jp_journal_max_trans_age), 368 JF(j_1st_reserved_block), 369 JF(j_state), 370 JF(j_trans_id), 371 JF(j_mount_id), 372 JF(j_start), 373 JF(j_len), 374 JF(j_len_alloc), 375 atomic_read(&r->s_journal->j_wcount), 376 JF(j_bcount), 377 JF(j_first_unflushed_offset), 378 JF(j_last_flush_trans_id), 379 JF(j_trans_start_time), 380 JF(j_list_bitmap_index), 381 JF(j_must_wait), 382 JF(j_next_full_flush), 383 JF(j_next_async_flush), 384 JF(j_cnode_used), 385 JF(j_cnode_free), 386 SFPJ(in_journal), 387 SFPJ(in_journal_bitmap), 388 SFPJ(in_journal_reusable), 389 SFPJ(lock_journal), 390 SFPJ(lock_journal_wait), 391 SFPJ(journal_being), 392 SFPJ(journal_relock_writers), 393 SFPJ(journal_relock_wcount), 394 SFPJ(mark_dirty), 395 SFPJ(mark_dirty_already), 396 SFPJ(mark_dirty_notjournal), 397 SFPJ(restore_prepared), SFPJ(prepare), SFPJ(prepare_retry) 398 ); 399 return 0; 400 } 401 402 /* iterator */ 403 static int test_sb(struct super_block *sb, void *data) 404 { 405 return data == sb; 406 } 407 408 static int set_sb(struct super_block *sb, void *data) 409 { 410 return -ENOENT; 411 } 412 413 static void *r_start(struct seq_file *m, loff_t * pos) 414 { 415 struct proc_dir_entry *de = m->private; 416 struct super_block *s = de->parent->data; 417 loff_t l = *pos; 418 419 if (l) 420 return NULL; 421 422 if (IS_ERR(sget(&reiserfs_fs_type, test_sb, set_sb, s))) 423 return NULL; 424 425 up_write(&s->s_umount); 426 427 if (de->deleted) { 428 deactivate_super(s); 429 return NULL; 430 } 431 432 return s; 433 } 434 435 static void *r_next(struct seq_file *m, void *v, loff_t * pos) 436 { 437 ++*pos; 438 if (v) 439 deactivate_super(v); 440 return NULL; 441 } 442 443 static void r_stop(struct seq_file *m, void *v) 444 { 445 if (v) 446 deactivate_super(v); 447 } 448 449 static int r_show(struct seq_file *m, void *v) 450 { 451 struct proc_dir_entry *de = m->private; 452 int (*show) (struct seq_file *, struct super_block *) = de->data; 453 return show(m, v); 454 } 455 456 static struct seq_operations r_ops = { 457 .start = r_start, 458 .next = r_next, 459 .stop = r_stop, 460 .show = r_show, 461 }; 462 463 static int r_open(struct inode *inode, struct file *file) 464 { 465 int ret = seq_open(file, &r_ops); 466 467 if (!ret) { 468 struct seq_file *m = file->private_data; 469 m->private = PDE(inode); 470 } 471 return ret; 472 } 473 474 static struct file_operations r_file_operations = { 475 .open = r_open, 476 .read = seq_read, 477 .llseek = seq_lseek, 478 .release = seq_release, 479 }; 480 481 static struct proc_dir_entry *proc_info_root = NULL; 482 static const char proc_info_root_name[] = "fs/reiserfs"; 483 484 static void add_file(struct super_block *sb, char *name, 485 int (*func) (struct seq_file *, struct super_block *)) 486 { 487 struct proc_dir_entry *de; 488 de = create_proc_entry(name, 0, REISERFS_SB(sb)->procdir); 489 if (de) { 490 de->data = func; 491 de->proc_fops = &r_file_operations; 492 } 493 } 494 495 int reiserfs_proc_info_init(struct super_block *sb) 496 { 497 spin_lock_init(&__PINFO(sb).lock); 498 REISERFS_SB(sb)->procdir = 499 proc_mkdir(reiserfs_bdevname(sb), proc_info_root); 500 if (REISERFS_SB(sb)->procdir) { 501 REISERFS_SB(sb)->procdir->owner = THIS_MODULE; 502 REISERFS_SB(sb)->procdir->data = sb; 503 add_file(sb, "version", show_version); 504 add_file(sb, "super", show_super); 505 add_file(sb, "per-level", show_per_level); 506 add_file(sb, "bitmap", show_bitmap); 507 add_file(sb, "on-disk-super", show_on_disk_super); 508 add_file(sb, "oidmap", show_oidmap); 509 add_file(sb, "journal", show_journal); 510 return 0; 511 } 512 reiserfs_warning(sb, "reiserfs: cannot create /proc/%s/%s", 513 proc_info_root_name, reiserfs_bdevname(sb)); 514 return 1; 515 } 516 517 int reiserfs_proc_info_done(struct super_block *sb) 518 { 519 struct proc_dir_entry *de = REISERFS_SB(sb)->procdir; 520 if (de) { 521 remove_proc_entry("journal", de); 522 remove_proc_entry("oidmap", de); 523 remove_proc_entry("on-disk-super", de); 524 remove_proc_entry("bitmap", de); 525 remove_proc_entry("per-level", de); 526 remove_proc_entry("super", de); 527 remove_proc_entry("version", de); 528 } 529 spin_lock(&__PINFO(sb).lock); 530 __PINFO(sb).exiting = 1; 531 spin_unlock(&__PINFO(sb).lock); 532 if (proc_info_root) { 533 remove_proc_entry(reiserfs_bdevname(sb), proc_info_root); 534 REISERFS_SB(sb)->procdir = NULL; 535 } 536 return 0; 537 } 538 539 struct proc_dir_entry *reiserfs_proc_register_global(char *name, 540 read_proc_t * func) 541 { 542 return (proc_info_root) ? create_proc_read_entry(name, 0, 543 proc_info_root, 544 func, NULL) : NULL; 545 } 546 547 void reiserfs_proc_unregister_global(const char *name) 548 { 549 remove_proc_entry(name, proc_info_root); 550 } 551 552 int reiserfs_proc_info_global_init(void) 553 { 554 if (proc_info_root == NULL) { 555 proc_info_root = proc_mkdir(proc_info_root_name, NULL); 556 if (proc_info_root) { 557 proc_info_root->owner = THIS_MODULE; 558 } else { 559 reiserfs_warning(NULL, 560 "reiserfs: cannot create /proc/%s", 561 proc_info_root_name); 562 return 1; 563 } 564 } 565 return 0; 566 } 567 568 int reiserfs_proc_info_global_done(void) 569 { 570 if (proc_info_root != NULL) { 571 proc_info_root = NULL; 572 remove_proc_entry(proc_info_root_name, NULL); 573 } 574 return 0; 575 } 576 577 /* REISERFS_PROC_INFO */ 578 #else 579 580 int reiserfs_proc_info_init(struct super_block *sb) 581 { 582 return 0; 583 } 584 int reiserfs_proc_info_done(struct super_block *sb) 585 { 586 return 0; 587 } 588 589 struct proc_dir_entry *reiserfs_proc_register_global(char *name, 590 read_proc_t * func) 591 { 592 return NULL; 593 } 594 595 void reiserfs_proc_unregister_global(const char *name) 596 {; 597 } 598 599 int reiserfs_proc_info_global_init(void) 600 { 601 return 0; 602 } 603 int reiserfs_proc_info_global_done(void) 604 { 605 return 0; 606 } 607 608 int reiserfs_global_version_in_proc(char *buffer, char **start, 609 off_t offset, 610 int count, int *eof, void *data) 611 { 612 return 0; 613 } 614 615 /* REISERFS_PROC_INFO */ 616 #endif 617 618 /* 619 * $Log: procfs.c,v $ 620 * Revision 1.1.8.2 2001/07/15 17:08:42 god 621 * . use get_super() in procfs.c 622 * . remove remove_save_link() from reiserfs_do_truncate() 623 * 624 * I accept terms and conditions stated in the Legal Agreement 625 * (available at http://www.namesys.com/legalese.html) 626 * 627 * Revision 1.1.8.1 2001/07/11 16:48:50 god 628 * proc info support 629 * 630 * I accept terms and conditions stated in the Legal Agreement 631 * (available at http://www.namesys.com/legalese.html) 632 * 633 */ 634 635 /* 636 * Make Linus happy. 637 * Local variables: 638 * c-indentation-style: "K&R" 639 * mode-name: "LC" 640 * c-basic-offset: 8 641 * tab-width: 8 642 * End: 643 */ 644