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 #include <linux/blkdev.h> 19 20 /* 21 * LOCKING: 22 * 23 * These guys are evicted from procfs as the very first step in ->kill_sb(). 24 * 25 */ 26 27 static int show_version(struct seq_file *m, void *unused) 28 { 29 struct super_block *sb = m->private; 30 char *format; 31 32 if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_6)) { 33 format = "3.6"; 34 } else if (REISERFS_SB(sb)->s_properties & (1 << REISERFS_3_5)) { 35 format = "3.5"; 36 } else { 37 format = "unknown"; 38 } 39 40 seq_printf(m, "%s format\twith checks %s\n", format, 41 #if defined( CONFIG_REISERFS_CHECK ) 42 "on" 43 #else 44 "off" 45 #endif 46 ); 47 return 0; 48 } 49 50 #define SF( x ) ( r -> x ) 51 #define SFP( x ) SF( s_proc_info_data.x ) 52 #define SFPL( x ) SFP( x[ level ] ) 53 #define SFPF( x ) SFP( scan_bitmap.x ) 54 #define SFPJ( x ) SFP( journal.x ) 55 56 #define D2C( x ) le16_to_cpu( x ) 57 #define D4C( x ) le32_to_cpu( x ) 58 #define DF( x ) D2C( rs -> s_v1.x ) 59 #define DFL( x ) D4C( rs -> s_v1.x ) 60 61 #define objectid_map( s, rs ) (old_format_only (s) ? \ 62 (__le32 *)((struct reiserfs_super_block_v1 *)rs + 1) : \ 63 (__le32 *)(rs + 1)) 64 #define MAP( i ) D4C( objectid_map( sb, rs )[ i ] ) 65 66 #define DJF( x ) le32_to_cpu( rs -> x ) 67 #define DJP( x ) le32_to_cpu( jp -> x ) 68 #define JF( x ) ( r -> s_journal -> x ) 69 70 static int show_super(struct seq_file *m, void *unused) 71 { 72 struct super_block *sb = m->private; 73 struct reiserfs_sb_info *r = REISERFS_SB(sb); 74 75 seq_printf(m, "state: \t%s\n" 76 "mount options: \t%s%s%s%s%s%s%s%s%s%s%s\n" 77 "gen. counter: \t%i\n" 78 "s_disk_reads: \t%i\n" 79 "s_disk_writes: \t%i\n" 80 "s_fix_nodes: \t%i\n" 81 "s_do_balance: \t%i\n" 82 "s_unneeded_left_neighbor: \t%i\n" 83 "s_good_search_by_key_reada: \t%i\n" 84 "s_bmaps: \t%i\n" 85 "s_bmaps_without_search: \t%i\n" 86 "s_direct2indirect: \t%i\n" 87 "s_indirect2direct: \t%i\n" 88 "\n" 89 "max_hash_collisions: \t%i\n" 90 "breads: \t%lu\n" 91 "bread_misses: \t%lu\n" 92 "search_by_key: \t%lu\n" 93 "search_by_key_fs_changed: \t%lu\n" 94 "search_by_key_restarted: \t%lu\n" 95 "insert_item_restarted: \t%lu\n" 96 "paste_into_item_restarted: \t%lu\n" 97 "cut_from_item_restarted: \t%lu\n" 98 "delete_solid_item_restarted: \t%lu\n" 99 "delete_item_restarted: \t%lu\n" 100 "leaked_oid: \t%lu\n" 101 "leaves_removable: \t%lu\n", 102 SF(s_mount_state) == REISERFS_VALID_FS ? 103 "REISERFS_VALID_FS" : "REISERFS_ERROR_FS", 104 reiserfs_r5_hash(sb) ? "FORCE_R5 " : "", 105 reiserfs_rupasov_hash(sb) ? "FORCE_RUPASOV " : "", 106 reiserfs_tea_hash(sb) ? "FORCE_TEA " : "", 107 reiserfs_hash_detect(sb) ? "DETECT_HASH " : "", 108 reiserfs_no_border(sb) ? "NO_BORDER " : "BORDER ", 109 reiserfs_no_unhashed_relocation(sb) ? 110 "NO_UNHASHED_RELOCATION " : "", 111 reiserfs_hashed_relocation(sb) ? "UNHASHED_RELOCATION " : "", 112 reiserfs_test4(sb) ? "TEST4 " : "", 113 have_large_tails(sb) ? "TAILS " : have_small_tails(sb) ? 114 "SMALL_TAILS " : "NO_TAILS ", 115 replay_only(sb) ? "REPLAY_ONLY " : "", 116 convert_reiserfs(sb) ? "CONV " : "", 117 atomic_read(&r->s_generation_counter), 118 SF(s_disk_reads), SF(s_disk_writes), SF(s_fix_nodes), 119 SF(s_do_balance), SF(s_unneeded_left_neighbor), 120 SF(s_good_search_by_key_reada), SF(s_bmaps), 121 SF(s_bmaps_without_search), SF(s_direct2indirect), 122 SF(s_indirect2direct), SFP(max_hash_collisions), SFP(breads), 123 SFP(bread_miss), SFP(search_by_key), 124 SFP(search_by_key_fs_changed), SFP(search_by_key_restarted), 125 SFP(insert_item_restarted), SFP(paste_into_item_restarted), 126 SFP(cut_from_item_restarted), 127 SFP(delete_solid_item_restarted), SFP(delete_item_restarted), 128 SFP(leaked_oid), SFP(leaves_removable)); 129 130 return 0; 131 } 132 133 static int show_per_level(struct seq_file *m, void *unused) 134 { 135 struct super_block *sb = m->private; 136 struct reiserfs_sb_info *r = REISERFS_SB(sb); 137 int level; 138 139 seq_printf(m, "level\t" 140 " balances" 141 " [sbk: reads" 142 " fs_changed" 143 " restarted]" 144 " free space" 145 " items" 146 " can_remove" 147 " lnum" 148 " rnum" 149 " lbytes" 150 " rbytes" 151 " get_neig" 152 " get_neig_res" " need_l_neig" " need_r_neig" "\n"); 153 154 for (level = 0; level < MAX_HEIGHT; ++level) { 155 seq_printf(m, "%i\t" 156 " %12lu" 157 " %12lu" 158 " %12lu" 159 " %12lu" 160 " %12lu" 161 " %12lu" 162 " %12lu" 163 " %12li" 164 " %12li" 165 " %12li" 166 " %12li" 167 " %12lu" 168 " %12lu" 169 " %12lu" 170 " %12lu" 171 "\n", 172 level, 173 SFPL(balance_at), 174 SFPL(sbk_read_at), 175 SFPL(sbk_fs_changed), 176 SFPL(sbk_restarted), 177 SFPL(free_at), 178 SFPL(items_at), 179 SFPL(can_node_be_removed), 180 SFPL(lnum), 181 SFPL(rnum), 182 SFPL(lbytes), 183 SFPL(rbytes), 184 SFPL(get_neighbors), 185 SFPL(get_neighbors_restart), 186 SFPL(need_l_neighbor), SFPL(need_r_neighbor) 187 ); 188 } 189 return 0; 190 } 191 192 static int show_bitmap(struct seq_file *m, void *unused) 193 { 194 struct super_block *sb = m->private; 195 struct reiserfs_sb_info *r = REISERFS_SB(sb); 196 197 seq_printf(m, "free_block: %lu\n" 198 " scan_bitmap:" 199 " wait" 200 " bmap" 201 " retry" 202 " stolen" 203 " journal_hint" 204 "journal_nohint" 205 "\n" 206 " %14lu" 207 " %14lu" 208 " %14lu" 209 " %14lu" 210 " %14lu" 211 " %14lu" 212 " %14lu" 213 "\n", 214 SFP(free_block), 215 SFPF(call), 216 SFPF(wait), 217 SFPF(bmap), 218 SFPF(retry), 219 SFPF(stolen), 220 SFPF(in_journal_hint), SFPF(in_journal_nohint)); 221 222 return 0; 223 } 224 225 static int show_on_disk_super(struct seq_file *m, void *unused) 226 { 227 struct super_block *sb = m->private; 228 struct reiserfs_sb_info *sb_info = REISERFS_SB(sb); 229 struct reiserfs_super_block *rs = sb_info->s_rs; 230 int hash_code = DFL(s_hash_function_code); 231 __u32 flags = DJF(s_flags); 232 233 seq_printf(m, "block_count: \t%i\n" 234 "free_blocks: \t%i\n" 235 "root_block: \t%i\n" 236 "blocksize: \t%i\n" 237 "oid_maxsize: \t%i\n" 238 "oid_cursize: \t%i\n" 239 "umount_state: \t%i\n" 240 "magic: \t%10.10s\n" 241 "fs_state: \t%i\n" 242 "hash: \t%s\n" 243 "tree_height: \t%i\n" 244 "bmap_nr: \t%i\n" 245 "version: \t%i\n" 246 "flags: \t%x[%s]\n" 247 "reserved_for_journal: \t%i\n", 248 DFL(s_block_count), 249 DFL(s_free_blocks), 250 DFL(s_root_block), 251 DF(s_blocksize), 252 DF(s_oid_maxsize), 253 DF(s_oid_cursize), 254 DF(s_umount_state), 255 rs->s_v1.s_magic, 256 DF(s_fs_state), 257 hash_code == TEA_HASH ? "tea" : 258 (hash_code == YURA_HASH) ? "rupasov" : 259 (hash_code == R5_HASH) ? "r5" : 260 (hash_code == UNSET_HASH) ? "unset" : "unknown", 261 DF(s_tree_height), 262 DF(s_bmap_nr), 263 DF(s_version), flags, (flags & reiserfs_attrs_cleared) 264 ? "attrs_cleared" : "", DF(s_reserved_for_journal)); 265 266 return 0; 267 } 268 269 static int show_oidmap(struct seq_file *m, void *unused) 270 { 271 struct super_block *sb = m->private; 272 struct reiserfs_sb_info *sb_info = REISERFS_SB(sb); 273 struct reiserfs_super_block *rs = sb_info->s_rs; 274 unsigned int mapsize = le16_to_cpu(rs->s_v1.s_oid_cursize); 275 unsigned long total_used = 0; 276 int i; 277 278 for (i = 0; i < mapsize; ++i) { 279 __u32 right; 280 281 right = (i == mapsize - 1) ? MAX_KEY_OBJECTID : MAP(i + 1); 282 seq_printf(m, "%s: [ %x .. %x )\n", 283 (i & 1) ? "free" : "used", MAP(i), right); 284 if (!(i & 1)) { 285 total_used += right - MAP(i); 286 } 287 } 288 #if defined( REISERFS_USE_OIDMAPF ) 289 if (sb_info->oidmap.use_file && (sb_info->oidmap.mapf != NULL)) { 290 loff_t size = file_inode(sb_info->oidmap.mapf)->i_size; 291 total_used += size / sizeof(reiserfs_oidinterval_d_t); 292 } 293 #endif 294 seq_printf(m, "total: \t%i [%i/%i] used: %lu [exact]\n", 295 mapsize, 296 mapsize, le16_to_cpu(rs->s_v1.s_oid_maxsize), total_used); 297 return 0; 298 } 299 300 static time64_t ktime_mono_to_real_seconds(time64_t mono) 301 { 302 ktime_t kt = ktime_set(mono, NSEC_PER_SEC/2); 303 304 return ktime_divns(ktime_mono_to_real(kt), NSEC_PER_SEC); 305 } 306 307 static int show_journal(struct seq_file *m, void *unused) 308 { 309 struct super_block *sb = m->private; 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; 313 314 seq_printf(m, /* on-disk fields */ 315 "jp_journal_1st_block: \t%i\n" 316 "jp_journal_dev: \t%pg[%x]\n" 317 "jp_journal_size: \t%i\n" 318 "jp_journal_trans_max: \t%i\n" 319 "jp_journal_magic: \t%i\n" 320 "jp_journal_max_batch: \t%i\n" 321 "jp_journal_max_commit_age: \t%i\n" 322 "jp_journal_max_trans_age: \t%i\n" 323 /* incore fields */ 324 "j_1st_reserved_block: \t%i\n" 325 "j_state: \t%li\n" 326 "j_trans_id: \t%u\n" 327 "j_mount_id: \t%lu\n" 328 "j_start: \t%lu\n" 329 "j_len: \t%lu\n" 330 "j_len_alloc: \t%lu\n" 331 "j_wcount: \t%i\n" 332 "j_bcount: \t%lu\n" 333 "j_first_unflushed_offset: \t%lu\n" 334 "j_last_flush_trans_id: \t%u\n" 335 "j_trans_start_time: \t%lli\n" 336 "j_list_bitmap_index: \t%i\n" 337 "j_must_wait: \t%i\n" 338 "j_next_full_flush: \t%i\n" 339 "j_next_async_flush: \t%i\n" 340 "j_cnode_used: \t%i\n" "j_cnode_free: \t%i\n" "\n" 341 /* reiserfs_proc_info_data_t.journal fields */ 342 "in_journal: \t%12lu\n" 343 "in_journal_bitmap: \t%12lu\n" 344 "in_journal_reusable: \t%12lu\n" 345 "lock_journal: \t%12lu\n" 346 "lock_journal_wait: \t%12lu\n" 347 "journal_begin: \t%12lu\n" 348 "journal_relock_writers: \t%12lu\n" 349 "journal_relock_wcount: \t%12lu\n" 350 "mark_dirty: \t%12lu\n" 351 "mark_dirty_already: \t%12lu\n" 352 "mark_dirty_notjournal: \t%12lu\n" 353 "restore_prepared: \t%12lu\n" 354 "prepare: \t%12lu\n" 355 "prepare_retry: \t%12lu\n", 356 DJP(jp_journal_1st_block), 357 SB_JOURNAL(sb)->j_bdev_handle->bdev, 358 DJP(jp_journal_dev), 359 DJP(jp_journal_size), 360 DJP(jp_journal_trans_max), 361 DJP(jp_journal_magic), 362 DJP(jp_journal_max_batch), 363 SB_JOURNAL(sb)->j_max_commit_age, 364 DJP(jp_journal_max_trans_age), 365 JF(j_1st_reserved_block), 366 JF(j_state), 367 JF(j_trans_id), 368 JF(j_mount_id), 369 JF(j_start), 370 JF(j_len), 371 JF(j_len_alloc), 372 atomic_read(&r->s_journal->j_wcount), 373 JF(j_bcount), 374 JF(j_first_unflushed_offset), 375 JF(j_last_flush_trans_id), 376 ktime_mono_to_real_seconds(JF(j_trans_start_time)), 377 JF(j_list_bitmap_index), 378 JF(j_must_wait), 379 JF(j_next_full_flush), 380 JF(j_next_async_flush), 381 JF(j_cnode_used), 382 JF(j_cnode_free), 383 SFPJ(in_journal), 384 SFPJ(in_journal_bitmap), 385 SFPJ(in_journal_reusable), 386 SFPJ(lock_journal), 387 SFPJ(lock_journal_wait), 388 SFPJ(journal_being), 389 SFPJ(journal_relock_writers), 390 SFPJ(journal_relock_wcount), 391 SFPJ(mark_dirty), 392 SFPJ(mark_dirty_already), 393 SFPJ(mark_dirty_notjournal), 394 SFPJ(restore_prepared), SFPJ(prepare), SFPJ(prepare_retry) 395 ); 396 return 0; 397 } 398 399 static struct proc_dir_entry *proc_info_root = NULL; 400 static const char proc_info_root_name[] = "fs/reiserfs"; 401 402 static void add_file(struct super_block *sb, char *name, 403 int (*func) (struct seq_file *, void *)) 404 { 405 proc_create_single_data(name, 0, REISERFS_SB(sb)->procdir, func, sb); 406 } 407 408 int reiserfs_proc_info_init(struct super_block *sb) 409 { 410 char b[BDEVNAME_SIZE]; 411 char *s; 412 413 /* Some block devices use /'s */ 414 strscpy(b, sb->s_id, BDEVNAME_SIZE); 415 s = strchr(b, '/'); 416 if (s) 417 *s = '!'; 418 419 spin_lock_init(&__PINFO(sb).lock); 420 REISERFS_SB(sb)->procdir = proc_mkdir_data(b, 0, proc_info_root, sb); 421 if (REISERFS_SB(sb)->procdir) { 422 add_file(sb, "version", show_version); 423 add_file(sb, "super", show_super); 424 add_file(sb, "per-level", show_per_level); 425 add_file(sb, "bitmap", show_bitmap); 426 add_file(sb, "on-disk-super", show_on_disk_super); 427 add_file(sb, "oidmap", show_oidmap); 428 add_file(sb, "journal", show_journal); 429 return 0; 430 } 431 reiserfs_warning(sb, "cannot create /proc/%s/%s", 432 proc_info_root_name, b); 433 return 1; 434 } 435 436 int reiserfs_proc_info_done(struct super_block *sb) 437 { 438 struct proc_dir_entry *de = REISERFS_SB(sb)->procdir; 439 if (de) { 440 char b[BDEVNAME_SIZE]; 441 char *s; 442 443 /* Some block devices use /'s */ 444 strscpy(b, sb->s_id, BDEVNAME_SIZE); 445 s = strchr(b, '/'); 446 if (s) 447 *s = '!'; 448 449 remove_proc_subtree(b, proc_info_root); 450 REISERFS_SB(sb)->procdir = NULL; 451 } 452 return 0; 453 } 454 455 int reiserfs_proc_info_global_init(void) 456 { 457 if (proc_info_root == NULL) { 458 proc_info_root = proc_mkdir(proc_info_root_name, NULL); 459 if (!proc_info_root) { 460 reiserfs_warning(NULL, "cannot create /proc/%s", 461 proc_info_root_name); 462 return 1; 463 } 464 } 465 return 0; 466 } 467 468 int reiserfs_proc_info_global_done(void) 469 { 470 if (proc_info_root != NULL) { 471 proc_info_root = NULL; 472 remove_proc_entry(proc_info_root_name, NULL); 473 } 474 return 0; 475 } 476 /* 477 * Revision 1.1.8.2 2001/07/15 17:08:42 god 478 * . use get_super() in procfs.c 479 * . remove remove_save_link() from reiserfs_do_truncate() 480 * 481 * I accept terms and conditions stated in the Legal Agreement 482 * (available at http://www.namesys.com/legalese.html) 483 * 484 * Revision 1.1.8.1 2001/07/11 16:48:50 god 485 * proc info support 486 * 487 * I accept terms and conditions stated in the Legal Agreement 488 * (available at http://www.namesys.com/legalese.html) 489 * 490 */ 491