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 <linux/uaccess.h> 15 #include "reiserfs.h" 16 #include <linux/init.h> 17 #include <linux/proc_fs.h> 18 19 /* 20 * LOCKING: 21 * 22 * These guys are evicted from procfs as the very first step in ->kill_sb(). 23 * 24 */ 25 26 static int show_version(struct seq_file *m, void *unused) 27 { 28 struct super_block *sb = m->private; 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 DJP( x ) le32_to_cpu( jp -> x ) 67 #define JF( x ) ( r -> s_journal -> x ) 68 69 static int show_super(struct seq_file *m, void *unused) 70 { 71 struct super_block *sb = m->private; 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 } 131 132 static int show_per_level(struct seq_file *m, void *unused) 133 { 134 struct super_block *sb = m->private; 135 struct reiserfs_sb_info *r = REISERFS_SB(sb); 136 int level; 137 138 seq_printf(m, "level\t" 139 " balances" 140 " [sbk: reads" 141 " fs_changed" 142 " restarted]" 143 " free space" 144 " items" 145 " can_remove" 146 " lnum" 147 " rnum" 148 " lbytes" 149 " rbytes" 150 " get_neig" 151 " get_neig_res" " need_l_neig" " need_r_neig" "\n"); 152 153 for (level = 0; level < MAX_HEIGHT; ++level) { 154 seq_printf(m, "%i\t" 155 " %12lu" 156 " %12lu" 157 " %12lu" 158 " %12lu" 159 " %12lu" 160 " %12lu" 161 " %12lu" 162 " %12li" 163 " %12li" 164 " %12li" 165 " %12li" 166 " %12lu" 167 " %12lu" 168 " %12lu" 169 " %12lu" 170 "\n", 171 level, 172 SFPL(balance_at), 173 SFPL(sbk_read_at), 174 SFPL(sbk_fs_changed), 175 SFPL(sbk_restarted), 176 SFPL(free_at), 177 SFPL(items_at), 178 SFPL(can_node_be_removed), 179 SFPL(lnum), 180 SFPL(rnum), 181 SFPL(lbytes), 182 SFPL(rbytes), 183 SFPL(get_neighbors), 184 SFPL(get_neighbors_restart), 185 SFPL(need_l_neighbor), SFPL(need_r_neighbor) 186 ); 187 } 188 return 0; 189 } 190 191 static int show_bitmap(struct seq_file *m, void *unused) 192 { 193 struct super_block *sb = m->private; 194 struct reiserfs_sb_info *r = REISERFS_SB(sb); 195 196 seq_printf(m, "free_block: %lu\n" 197 " scan_bitmap:" 198 " wait" 199 " bmap" 200 " retry" 201 " stolen" 202 " journal_hint" 203 "journal_nohint" 204 "\n" 205 " %14lu" 206 " %14lu" 207 " %14lu" 208 " %14lu" 209 " %14lu" 210 " %14lu" 211 " %14lu" 212 "\n", 213 SFP(free_block), 214 SFPF(call), 215 SFPF(wait), 216 SFPF(bmap), 217 SFPF(retry), 218 SFPF(stolen), 219 SFPF(in_journal_hint), SFPF(in_journal_nohint)); 220 221 return 0; 222 } 223 224 static int show_on_disk_super(struct seq_file *m, void *unused) 225 { 226 struct super_block *sb = m->private; 227 struct reiserfs_sb_info *sb_info = REISERFS_SB(sb); 228 struct reiserfs_super_block *rs = sb_info->s_rs; 229 int hash_code = DFL(s_hash_function_code); 230 __u32 flags = DJF(s_flags); 231 232 seq_printf(m, "block_count: \t%i\n" 233 "free_blocks: \t%i\n" 234 "root_block: \t%i\n" 235 "blocksize: \t%i\n" 236 "oid_maxsize: \t%i\n" 237 "oid_cursize: \t%i\n" 238 "umount_state: \t%i\n" 239 "magic: \t%10.10s\n" 240 "fs_state: \t%i\n" 241 "hash: \t%s\n" 242 "tree_height: \t%i\n" 243 "bmap_nr: \t%i\n" 244 "version: \t%i\n" 245 "flags: \t%x[%s]\n" 246 "reserved_for_journal: \t%i\n", 247 DFL(s_block_count), 248 DFL(s_free_blocks), 249 DFL(s_root_block), 250 DF(s_blocksize), 251 DF(s_oid_maxsize), 252 DF(s_oid_cursize), 253 DF(s_umount_state), 254 rs->s_v1.s_magic, 255 DF(s_fs_state), 256 hash_code == TEA_HASH ? "tea" : 257 (hash_code == YURA_HASH) ? "rupasov" : 258 (hash_code == R5_HASH) ? "r5" : 259 (hash_code == UNSET_HASH) ? "unset" : "unknown", 260 DF(s_tree_height), 261 DF(s_bmap_nr), 262 DF(s_version), flags, (flags & reiserfs_attrs_cleared) 263 ? "attrs_cleared" : "", DF(s_reserved_for_journal)); 264 265 return 0; 266 } 267 268 static int show_oidmap(struct seq_file *m, void *unused) 269 { 270 struct super_block *sb = m->private; 271 struct reiserfs_sb_info *sb_info = REISERFS_SB(sb); 272 struct reiserfs_super_block *rs = sb_info->s_rs; 273 unsigned int mapsize = le16_to_cpu(rs->s_v1.s_oid_cursize); 274 unsigned long total_used = 0; 275 int i; 276 277 for (i = 0; i < mapsize; ++i) { 278 __u32 right; 279 280 right = (i == mapsize - 1) ? MAX_KEY_OBJECTID : MAP(i + 1); 281 seq_printf(m, "%s: [ %x .. %x )\n", 282 (i & 1) ? "free" : "used", MAP(i), right); 283 if (!(i & 1)) { 284 total_used += right - MAP(i); 285 } 286 } 287 #if defined( REISERFS_USE_OIDMAPF ) 288 if (sb_info->oidmap.use_file && (sb_info->oidmap.mapf != NULL)) { 289 loff_t size = file_inode(sb_info->oidmap.mapf)->i_size; 290 total_used += size / sizeof(reiserfs_oidinterval_d_t); 291 } 292 #endif 293 seq_printf(m, "total: \t%i [%i/%i] used: %lu [exact]\n", 294 mapsize, 295 mapsize, le16_to_cpu(rs->s_v1.s_oid_maxsize), total_used); 296 return 0; 297 } 298 299 static time64_t ktime_mono_to_real_seconds(time64_t mono) 300 { 301 ktime_t kt = ktime_set(mono, NSEC_PER_SEC/2); 302 303 return ktime_divns(ktime_mono_to_real(kt), NSEC_PER_SEC); 304 } 305 306 static int show_journal(struct seq_file *m, void *unused) 307 { 308 struct super_block *sb = m->private; 309 struct reiserfs_sb_info *r = REISERFS_SB(sb); 310 struct reiserfs_super_block *rs = r->s_rs; 311 struct journal_params *jp = &rs->s_v1.s_journal; 312 313 seq_printf(m, /* on-disk fields */ 314 "jp_journal_1st_block: \t%i\n" 315 "jp_journal_dev: \t%pg[%x]\n" 316 "jp_journal_size: \t%i\n" 317 "jp_journal_trans_max: \t%i\n" 318 "jp_journal_magic: \t%i\n" 319 "jp_journal_max_batch: \t%i\n" 320 "jp_journal_max_commit_age: \t%i\n" 321 "jp_journal_max_trans_age: \t%i\n" 322 /* incore fields */ 323 "j_1st_reserved_block: \t%i\n" 324 "j_state: \t%li\n" 325 "j_trans_id: \t%u\n" 326 "j_mount_id: \t%lu\n" 327 "j_start: \t%lu\n" 328 "j_len: \t%lu\n" 329 "j_len_alloc: \t%lu\n" 330 "j_wcount: \t%i\n" 331 "j_bcount: \t%lu\n" 332 "j_first_unflushed_offset: \t%lu\n" 333 "j_last_flush_trans_id: \t%u\n" 334 "j_trans_start_time: \t%lli\n" 335 "j_list_bitmap_index: \t%i\n" 336 "j_must_wait: \t%i\n" 337 "j_next_full_flush: \t%i\n" 338 "j_next_async_flush: \t%i\n" 339 "j_cnode_used: \t%i\n" "j_cnode_free: \t%i\n" "\n" 340 /* reiserfs_proc_info_data_t.journal fields */ 341 "in_journal: \t%12lu\n" 342 "in_journal_bitmap: \t%12lu\n" 343 "in_journal_reusable: \t%12lu\n" 344 "lock_journal: \t%12lu\n" 345 "lock_journal_wait: \t%12lu\n" 346 "journal_begin: \t%12lu\n" 347 "journal_relock_writers: \t%12lu\n" 348 "journal_relock_wcount: \t%12lu\n" 349 "mark_dirty: \t%12lu\n" 350 "mark_dirty_already: \t%12lu\n" 351 "mark_dirty_notjournal: \t%12lu\n" 352 "restore_prepared: \t%12lu\n" 353 "prepare: \t%12lu\n" 354 "prepare_retry: \t%12lu\n", 355 DJP(jp_journal_1st_block), 356 SB_JOURNAL(sb)->j_dev_bd, 357 DJP(jp_journal_dev), 358 DJP(jp_journal_size), 359 DJP(jp_journal_trans_max), 360 DJP(jp_journal_magic), 361 DJP(jp_journal_max_batch), 362 SB_JOURNAL(sb)->j_max_commit_age, 363 DJP(jp_journal_max_trans_age), 364 JF(j_1st_reserved_block), 365 JF(j_state), 366 JF(j_trans_id), 367 JF(j_mount_id), 368 JF(j_start), 369 JF(j_len), 370 JF(j_len_alloc), 371 atomic_read(&r->s_journal->j_wcount), 372 JF(j_bcount), 373 JF(j_first_unflushed_offset), 374 JF(j_last_flush_trans_id), 375 ktime_mono_to_real_seconds(JF(j_trans_start_time)), 376 JF(j_list_bitmap_index), 377 JF(j_must_wait), 378 JF(j_next_full_flush), 379 JF(j_next_async_flush), 380 JF(j_cnode_used), 381 JF(j_cnode_free), 382 SFPJ(in_journal), 383 SFPJ(in_journal_bitmap), 384 SFPJ(in_journal_reusable), 385 SFPJ(lock_journal), 386 SFPJ(lock_journal_wait), 387 SFPJ(journal_being), 388 SFPJ(journal_relock_writers), 389 SFPJ(journal_relock_wcount), 390 SFPJ(mark_dirty), 391 SFPJ(mark_dirty_already), 392 SFPJ(mark_dirty_notjournal), 393 SFPJ(restore_prepared), SFPJ(prepare), SFPJ(prepare_retry) 394 ); 395 return 0; 396 } 397 398 static struct proc_dir_entry *proc_info_root = NULL; 399 static const char proc_info_root_name[] = "fs/reiserfs"; 400 401 static void add_file(struct super_block *sb, char *name, 402 int (*func) (struct seq_file *, void *)) 403 { 404 proc_create_single_data(name, 0, REISERFS_SB(sb)->procdir, func, sb); 405 } 406 407 int reiserfs_proc_info_init(struct super_block *sb) 408 { 409 char b[BDEVNAME_SIZE]; 410 char *s; 411 412 /* Some block devices use /'s */ 413 strlcpy(b, sb->s_id, BDEVNAME_SIZE); 414 s = strchr(b, '/'); 415 if (s) 416 *s = '!'; 417 418 spin_lock_init(&__PINFO(sb).lock); 419 REISERFS_SB(sb)->procdir = proc_mkdir_data(b, 0, proc_info_root, sb); 420 if (REISERFS_SB(sb)->procdir) { 421 add_file(sb, "version", show_version); 422 add_file(sb, "super", show_super); 423 add_file(sb, "per-level", show_per_level); 424 add_file(sb, "bitmap", show_bitmap); 425 add_file(sb, "on-disk-super", show_on_disk_super); 426 add_file(sb, "oidmap", show_oidmap); 427 add_file(sb, "journal", show_journal); 428 return 0; 429 } 430 reiserfs_warning(sb, "cannot create /proc/%s/%s", 431 proc_info_root_name, b); 432 return 1; 433 } 434 435 int reiserfs_proc_info_done(struct super_block *sb) 436 { 437 struct proc_dir_entry *de = REISERFS_SB(sb)->procdir; 438 if (de) { 439 char b[BDEVNAME_SIZE]; 440 char *s; 441 442 /* Some block devices use /'s */ 443 strlcpy(b, sb->s_id, BDEVNAME_SIZE); 444 s = strchr(b, '/'); 445 if (s) 446 *s = '!'; 447 448 remove_proc_subtree(b, proc_info_root); 449 REISERFS_SB(sb)->procdir = NULL; 450 } 451 return 0; 452 } 453 454 int reiserfs_proc_info_global_init(void) 455 { 456 if (proc_info_root == NULL) { 457 proc_info_root = proc_mkdir(proc_info_root_name, NULL); 458 if (!proc_info_root) { 459 reiserfs_warning(NULL, "cannot create /proc/%s", 460 proc_info_root_name); 461 return 1; 462 } 463 } 464 return 0; 465 } 466 467 int reiserfs_proc_info_global_done(void) 468 { 469 if (proc_info_root != NULL) { 470 proc_info_root = NULL; 471 remove_proc_entry(proc_info_root_name, NULL); 472 } 473 return 0; 474 } 475 /* 476 * Revision 1.1.8.2 2001/07/15 17:08:42 god 477 * . use get_super() in procfs.c 478 * . remove remove_save_link() from reiserfs_do_truncate() 479 * 480 * I accept terms and conditions stated in the Legal Agreement 481 * (available at http://www.namesys.com/legalese.html) 482 * 483 * Revision 1.1.8.1 2001/07/11 16:48:50 god 484 * proc info support 485 * 486 * I accept terms and conditions stated in the Legal Agreement 487 * (available at http://www.namesys.com/legalese.html) 488 * 489 */ 490 491 /* 492 * Make Linus happy. 493 * Local variables: 494 * c-indentation-style: "K&R" 495 * mode-name: "LC" 496 * c-basic-offset: 8 497 * tab-width: 8 498 * End: 499 */ 500