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/* 21 * LOCKING: 22 * 23 * We rely on new Alexander Viro's super-block locking. 24 * 25 */ 26 27static int show_version(struct seq_file *m, struct super_block *sb) 28{ 29 char *format; 30 31 if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_6)) { 32 format = "3.6"; 33 } else if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_5)) { 34 format = "3.5"; 35 } else { 36 format = "unknown"; 37 } 38 39 seq_printf(m, "%s format\twith checks %s\n", format, 40#if defined(CONFIG_REISERFS_CHECK) 41 "on" 42#else 43 "off" 44#endif 45 ); 46 return 0; 47} 48 49#define SF( x ) ( r -> x ) 50#define SFP( x ) SF( s_proc_info_data.x ) 51#define SFPL( x ) SFP( x[ level ] ) 52#define SFPF( x ) SFP( scan_bitmap.x ) 53#define SFPJ( x ) SFP( journal.x ) 54 55#define D2C( x ) le16_to_cpu( x ) 56#define D4C( x ) le32_to_cpu( x ) 57#define DF( x ) D2C( rs -> s_v1.x ) 58#define DFL( x ) D4C( rs -> s_v1.x ) 59 60#define objectid_map( s, rs ) (old_format_only (s) ? \ 61 (__le32 *)((struct reiserfs_super_block_v1 *)rs + 1) : \ 62 (__le32 *)(rs + 1)) 63#define MAP( i ) D4C( objectid_map( sb, rs )[ i ] ) 64 65#define DJF( x ) le32_to_cpu( rs -> x ) 66#define DJV( x ) le32_to_cpu( s_v1 -> x ) 67#define DJP( x ) le32_to_cpu( jp -> x ) 68#define JF( x ) ( r -> s_journal -> x ) 69 70static int show_super(struct seq_file *m, struct super_block *sb) 71{ 72 struct reiserfs_sb_info *r = REISERFS_SB(sb); 73 74 seq_printf(m, "state: \t%s\n" 75 "mount options: \t%s%s%s%s%s%s%s%s%s%s%s\n" 76 "gen. counter: \t%i\n" 77 "s_disk_reads: \t%i\n" 78 "s_disk_writes: \t%i\n" 79 "s_fix_nodes: \t%i\n" 80 "s_do_balance: \t%i\n" 81 "s_unneeded_left_neighbor: \t%i\n" 82 "s_good_search_by_key_reada: \t%i\n" 83 "s_bmaps: \t%i\n" 84 "s_bmaps_without_search: \t%i\n" 85 "s_direct2indirect: \t%i\n" 86 "s_indirect2direct: \t%i\n" 87 "\n" 88 "max_hash_collisions: \t%i\n" 89 "breads: \t%lu\n" 90 "bread_misses: \t%lu\n" 91 "search_by_key: \t%lu\n" 92 "search_by_key_fs_changed: \t%lu\n" 93 "search_by_key_restarted: \t%lu\n" 94 "insert_item_restarted: \t%lu\n" 95 "paste_into_item_restarted: \t%lu\n" 96 "cut_from_item_restarted: \t%lu\n" 97 "delete_solid_item_restarted: \t%lu\n" 98 "delete_item_restarted: \t%lu\n" 99 "leaked_oid: \t%lu\n" 100 "leaves_removable: \t%lu\n", 101 SF(s_mount_state) == REISERFS_VALID_FS ? 102 "REISERFS_VALID_FS" : "REISERFS_ERROR_FS", 103 reiserfs_r5_hash(sb) ? "FORCE_R5 " : "", 104 reiserfs_rupasov_hash(sb) ? "FORCE_RUPASOV " : "", 105 reiserfs_tea_hash(sb) ? "FORCE_TEA " : "", 106 reiserfs_hash_detect(sb) ? "DETECT_HASH " : "", 107 reiserfs_no_border(sb) ? "NO_BORDER " : "BORDER ", 108 reiserfs_no_unhashed_relocation(sb) ? 109 "NO_UNHASHED_RELOCATION " : "", 110 reiserfs_hashed_relocation(sb) ? "UNHASHED_RELOCATION " : "", 111 reiserfs_test4(sb) ? "TEST4 " : "", 112 have_large_tails(sb) ? "TAILS " : have_small_tails(sb) ? 113 "SMALL_TAILS " : "NO_TAILS ", 114 replay_only(sb) ? "REPLAY_ONLY " : "", 115 convert_reiserfs(sb) ? "CONV " : "", 116 atomic_read(&r->s_generation_counter), 117 SF(s_disk_reads), SF(s_disk_writes), SF(s_fix_nodes), 118 SF(s_do_balance), SF(s_unneeded_left_neighbor), 119 SF(s_good_search_by_key_reada), SF(s_bmaps), 120 SF(s_bmaps_without_search), SF(s_direct2indirect), 121 SF(s_indirect2direct), SFP(max_hash_collisions), SFP(breads), 122 SFP(bread_miss), SFP(search_by_key), 123 SFP(search_by_key_fs_changed), SFP(search_by_key_restarted), 124 SFP(insert_item_restarted), SFP(paste_into_item_restarted), 125 SFP(cut_from_item_restarted), 126 SFP(delete_solid_item_restarted), SFP(delete_item_restarted), 127 SFP(leaked_oid), SFP(leaves_removable)); 128 129 return 0; 130} 131 132static int show_per_level(struct seq_file *m, struct super_block *sb) 133{ 134 struct reiserfs_sb_info *r = REISERFS_SB(sb); 135 int level; 136 137 seq_printf(m, "level\t" 138 " balances" 139 " [sbk: reads" 140 " fs_changed" 141 " restarted]" 142 " free space" 143 " items" 144 " can_remove" 145 " lnum" 146 " rnum" 147 " lbytes" 148 " rbytes" 149 " get_neig" 150 " get_neig_res" " need_l_neig" " need_r_neig" "\n"); 151 152 for (level = 0; level < MAX_HEIGHT; ++level) { 153 seq_printf(m, "%i\t" 154 " %12lu" 155 " %12lu" 156 " %12lu" 157 " %12lu" 158 " %12lu" 159 " %12lu" 160 " %12lu" 161 " %12li" 162 " %12li" 163 " %12li" 164 " %12li" 165 " %12lu" 166 " %12lu" 167 " %12lu" 168 " %12lu" 169 "\n", 170 level, 171 SFPL(balance_at), 172 SFPL(sbk_read_at), 173 SFPL(sbk_fs_changed), 174 SFPL(sbk_restarted), 175 SFPL(free_at), 176 SFPL(items_at), 177 SFPL(can_node_be_removed), 178 SFPL(lnum), 179 SFPL(rnum), 180 SFPL(lbytes), 181 SFPL(rbytes), 182 SFPL(get_neighbors), 183 SFPL(get_neighbors_restart), 184 SFPL(need_l_neighbor), SFPL(need_r_neighbor) 185 ); 186 } 187 return 0; 188} 189 190static int show_bitmap(struct seq_file *m, struct super_block *sb) 191{ 192 struct reiserfs_sb_info *r = REISERFS_SB(sb); 193 194 seq_printf(m, "free_block: %lu\n" 195 " scan_bitmap:" 196 " wait" 197 " bmap" 198 " retry" 199 " stolen" 200 " journal_hint" 201 "journal_nohint" 202 "\n" 203 " %14lu" 204 " %14lu" 205 " %14lu" 206 " %14lu" 207 " %14lu" 208 " %14lu" 209 " %14lu" 210 "\n", 211 SFP(free_block), 212 SFPF(call), 213 SFPF(wait), 214 SFPF(bmap), 215 SFPF(retry), 216 SFPF(stolen), 217 SFPF(in_journal_hint), SFPF(in_journal_nohint)); 218 219 return 0; 220} 221 222static int show_on_disk_super(struct seq_file *m, struct super_block *sb) 223{ 224 struct reiserfs_sb_info *sb_info = REISERFS_SB(sb); 225 struct reiserfs_super_block *rs = sb_info->s_rs; 226 int hash_code = DFL(s_hash_function_code); 227 __u32 flags = DJF(s_flags); 228 229 seq_printf(m, "block_count: \t%i\n" 230 "free_blocks: \t%i\n" 231 "root_block: \t%i\n" 232 "blocksize: \t%i\n" 233 "oid_maxsize: \t%i\n" 234 "oid_cursize: \t%i\n" 235 "umount_state: \t%i\n" 236 "magic: \t%10.10s\n" 237 "fs_state: \t%i\n" 238 "hash: \t%s\n" 239 "tree_height: \t%i\n" 240 "bmap_nr: \t%i\n" 241 "version: \t%i\n" 242 "flags: \t%x[%s]\n" 243 "reserved_for_journal: \t%i\n", 244 DFL(s_block_count), 245 DFL(s_free_blocks), 246 DFL(s_root_block), 247 DF(s_blocksize), 248 DF(s_oid_maxsize), 249 DF(s_oid_cursize), 250 DF(s_umount_state), 251 rs->s_v1.s_magic, 252 DF(s_fs_state), 253 hash_code == TEA_HASH ? "tea" : 254 (hash_code == YURA_HASH) ? "rupasov" : 255 (hash_code == R5_HASH) ? "r5" : 256 (hash_code == UNSET_HASH) ? "unset" : "unknown", 257 DF(s_tree_height), 258 DF(s_bmap_nr), 259 DF(s_version), flags, (flags & reiserfs_attrs_cleared) 260 ? "attrs_cleared" : "", DF(s_reserved_for_journal)); 261 262 return 0; 263} 264 265static int show_oidmap(struct seq_file *m, struct super_block *sb) 266{ 267 struct reiserfs_sb_info *sb_info = REISERFS_SB(sb); 268 struct reiserfs_super_block *rs = sb_info->s_rs; 269 unsigned int mapsize = le16_to_cpu(rs->s_v1.s_oid_cursize); 270 unsigned long total_used = 0; 271 int i; 272 273 for (i = 0; i < mapsize; ++i) { 274 __u32 right; 275 276 right = (i == mapsize - 1) ? MAX_KEY_OBJECTID : MAP(i + 1); 277 seq_printf(m, "%s: [ %x .. %x )\n", 278 (i & 1) ? "free" : "used", MAP(i), right); 279 if (!(i & 1)) { 280 total_used += right - MAP(i); 281 } 282 } 283#if defined(REISERFS_USE_OIDMAPF) 284 if (sb_info->oidmap.use_file && (sb_info->oidmap.mapf != NULL)) { 285 loff_t size = sb_info->oidmap.mapf->f_path.dentry->d_inode->i_size; 286 total_used += size / sizeof(reiserfs_oidinterval_d_t); 287 } 288#endif 289 seq_printf(m, "total: \t%i [%i/%i] used: %lu [exact]\n", 290 mapsize, 291 mapsize, le16_to_cpu(rs->s_v1.s_oid_maxsize), total_used); 292 return 0; 293} 294 295static int show_journal(struct seq_file *m, struct super_block *sb) 296{ 297 struct reiserfs_sb_info *r = REISERFS_SB(sb); 298 struct reiserfs_super_block *rs = r->s_rs; 299 struct journal_params *jp = &rs->s_v1.s_journal; 300 char b[BDEVNAME_SIZE]; 301 302 seq_printf(m, /* on-disk fields */ 303 "jp_journal_1st_block: \t%i\n" 304 "jp_journal_dev: \t%s[%x]\n" 305 "jp_journal_size: \t%i\n" 306 "jp_journal_trans_max: \t%i\n" 307 "jp_journal_magic: \t%i\n" 308 "jp_journal_max_batch: \t%i\n" 309 "jp_journal_max_commit_age: \t%i\n" 310 "jp_journal_max_trans_age: \t%i\n" 311 /* incore fields */ 312 "j_1st_reserved_block: \t%i\n" 313 "j_state: \t%li\n" 314 "j_trans_id: \t%u\n" 315 "j_mount_id: \t%lu\n" 316 "j_start: \t%lu\n" 317 "j_len: \t%lu\n" 318 "j_len_alloc: \t%lu\n" 319 "j_wcount: \t%i\n" 320 "j_bcount: \t%lu\n" 321 "j_first_unflushed_offset: \t%lu\n" 322 "j_last_flush_trans_id: \t%u\n" 323 "j_trans_start_time: \t%li\n" 324 "j_list_bitmap_index: \t%i\n" 325 "j_must_wait: \t%i\n" 326 "j_next_full_flush: \t%i\n" 327 "j_next_async_flush: \t%i\n" 328 "j_cnode_used: \t%i\n" "j_cnode_free: \t%i\n" "\n" 329 /* reiserfs_proc_info_data_t.journal fields */ 330 "in_journal: \t%12lu\n" 331 "in_journal_bitmap: \t%12lu\n" 332 "in_journal_reusable: \t%12lu\n" 333 "lock_journal: \t%12lu\n" 334 "lock_journal_wait: \t%12lu\n" 335 "journal_begin: \t%12lu\n" 336 "journal_relock_writers: \t%12lu\n" 337 "journal_relock_wcount: \t%12lu\n" 338 "mark_dirty: \t%12lu\n" 339 "mark_dirty_already: \t%12lu\n" 340 "mark_dirty_notjournal: \t%12lu\n" 341 "restore_prepared: \t%12lu\n" 342 "prepare: \t%12lu\n" 343 "prepare_retry: \t%12lu\n", 344 DJP(jp_journal_1st_block), 345 bdevname(SB_JOURNAL(sb)->j_dev_bd, b), 346 DJP(jp_journal_dev), 347 DJP(jp_journal_size), 348 DJP(jp_journal_trans_max), 349 DJP(jp_journal_magic), 350 DJP(jp_journal_max_batch), 351 SB_JOURNAL(sb)->j_max_commit_age, 352 DJP(jp_journal_max_trans_age), 353 JF(j_1st_reserved_block), 354 JF(j_state), 355 JF(j_trans_id), 356 JF(j_mount_id), 357 JF(j_start), 358 JF(j_len), 359 JF(j_len_alloc), 360 atomic_read(&r->s_journal->j_wcount), 361 JF(j_bcount), 362 JF(j_first_unflushed_offset), 363 JF(j_last_flush_trans_id), 364 JF(j_trans_start_time), 365 JF(j_list_bitmap_index), 366 JF(j_must_wait), 367 JF(j_next_full_flush), 368 JF(j_next_async_flush), 369 JF(j_cnode_used), 370 JF(j_cnode_free), 371 SFPJ(in_journal), 372 SFPJ(in_journal_bitmap), 373 SFPJ(in_journal_reusable), 374 SFPJ(lock_journal), 375 SFPJ(lock_journal_wait), 376 SFPJ(journal_being), 377 SFPJ(journal_relock_writers), 378 SFPJ(journal_relock_wcount), 379 SFPJ(mark_dirty), 380 SFPJ(mark_dirty_already), 381 SFPJ(mark_dirty_notjournal), 382 SFPJ(restore_prepared), SFPJ(prepare), SFPJ(prepare_retry) 383 ); 384 return 0; 385} 386 387/* iterator */ 388static int test_sb(struct super_block *sb, void *data) 389{ 390 return data == sb; 391} 392 393static int set_sb(struct super_block *sb, void *data) 394{ 395 return -ENOENT; 396} 397 398static void *r_start(struct seq_file *m, loff_t * pos) 399{ 400 struct proc_dir_entry *de = m->private; 401 struct super_block *s = de->parent->data; 402 loff_t l = *pos; 403 404 if (l) 405 return NULL; 406 407 if (IS_ERR(sget(&reiserfs_fs_type, test_sb, set_sb, s))) 408 return NULL; 409 410 up_write(&s->s_umount); 411 return s; 412} 413 414static void *r_next(struct seq_file *m, void *v, loff_t * pos) 415{ 416 ++*pos; 417 if (v) 418 deactivate_super(v); 419 return NULL; 420} 421 422static void r_stop(struct seq_file *m, void *v) 423{ 424 if (v) 425 deactivate_super(v); 426} 427 428static int r_show(struct seq_file *m, void *v) 429{ 430 struct proc_dir_entry *de = m->private; 431 int (*show) (struct seq_file *, struct super_block *) = de->data; 432 return show(m, v); 433} 434 435static const struct seq_operations r_ops = { 436 .start = r_start, 437 .next = r_next, 438 .stop = r_stop, 439 .show = r_show, 440}; 441 442static int r_open(struct inode *inode, struct file *file) 443{ 444 int ret = seq_open(file, &r_ops); 445 446 if (!ret) { 447 struct seq_file *m = file->private_data; 448 m->private = PDE(inode); 449 } 450 return ret; 451} 452 453static const struct file_operations r_file_operations = { 454 .open = r_open, 455 .read = seq_read, 456 .llseek = seq_lseek, 457 .release = seq_release, 458 .owner = THIS_MODULE, 459}; 460 461static struct proc_dir_entry *proc_info_root = NULL; 462static const char proc_info_root_name[] = "fs/reiserfs"; 463 464static void add_file(struct super_block *sb, char *name, 465 int (*func) (struct seq_file *, struct super_block *)) 466{ 467 proc_create_data(name, 0, REISERFS_SB(sb)->procdir, 468 &r_file_operations, func); 469} 470 471int reiserfs_proc_info_init(struct super_block *sb) 472{ 473 char b[BDEVNAME_SIZE]; 474 char *s; 475 476 /* Some block devices use /'s */ 477 strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE); 478 s = strchr(b, '/'); 479 if (s) 480 *s = '!'; 481 482 spin_lock_init(&__PINFO(sb).lock); 483 REISERFS_SB(sb)->procdir = proc_mkdir(b, proc_info_root); 484 if (REISERFS_SB(sb)->procdir) { 485 REISERFS_SB(sb)->procdir->data = sb; 486 add_file(sb, "version", show_version); 487 add_file(sb, "super", show_super); 488 add_file(sb, "per-level", show_per_level); 489 add_file(sb, "bitmap", show_bitmap); 490 add_file(sb, "on-disk-super", show_on_disk_super); 491 add_file(sb, "oidmap", show_oidmap); 492 add_file(sb, "journal", show_journal); 493 return 0; 494 } 495 reiserfs_warning(sb, "cannot create /proc/%s/%s", 496 proc_info_root_name, b); 497 return 1; 498} 499 500int reiserfs_proc_info_done(struct super_block *sb) 501{ 502 struct proc_dir_entry *de = REISERFS_SB(sb)->procdir; 503 char b[BDEVNAME_SIZE]; 504 char *s; 505 506 /* Some block devices use /'s */ 507 strlcpy(b, reiserfs_bdevname(sb), BDEVNAME_SIZE); 508 s = strchr(b, '/'); 509 if (s) 510 *s = '!'; 511 512 if (de) { 513 remove_proc_entry("journal", de); 514 remove_proc_entry("oidmap", de); 515 remove_proc_entry("on-disk-super", de); 516 remove_proc_entry("bitmap", de); 517 remove_proc_entry("per-level", de); 518 remove_proc_entry("super", de); 519 remove_proc_entry("version", de); 520 } 521 spin_lock(&__PINFO(sb).lock); 522 __PINFO(sb).exiting = 1; 523 spin_unlock(&__PINFO(sb).lock); 524 if (proc_info_root) { 525 remove_proc_entry(b, proc_info_root); 526 REISERFS_SB(sb)->procdir = NULL; 527 } 528 return 0; 529} 530 531int reiserfs_proc_info_global_init(void) 532{ 533 if (proc_info_root == NULL) { 534 proc_info_root = proc_mkdir(proc_info_root_name, NULL); 535 if (!proc_info_root) { 536 reiserfs_warning(NULL, "cannot create /proc/%s", 537 proc_info_root_name); 538 return 1; 539 } 540 } 541 return 0; 542} 543 544int reiserfs_proc_info_global_done(void) 545{ 546 if (proc_info_root != NULL) { 547 proc_info_root = NULL; 548 remove_proc_entry(proc_info_root_name, NULL); 549 } 550 return 0; 551} 552/* 553 * Revision 1.1.8.2 2001/07/15 17:08:42 god 554 * . use get_super() in procfs.c 555 * . remove remove_save_link() from reiserfs_do_truncate() 556 * 557 * I accept terms and conditions stated in the Legal Agreement 558 * (available at http://www.namesys.com/legalese.html) 559 * 560 * Revision 1.1.8.1 2001/07/11 16:48:50 god 561 * proc info support 562 * 563 * I accept terms and conditions stated in the Legal Agreement 564 * (available at http://www.namesys.com/legalese.html) 565 * 566 */ 567 568/* 569 * Make Linus happy. 570 * Local variables: 571 * c-indentation-style: "K&R" 572 * mode-name: "LC" 573 * c-basic-offset: 8 574 * tab-width: 8 575 * End: 576 */ 577