1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * ocfs2_fs.h 5 * 6 * On-disk structures for OCFS2. 7 * 8 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License, version 2, as published by the Free Software Foundation. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public 20 * License along with this program; if not, write to the 21 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 22 * Boston, MA 021110-1307, USA. 23 */ 24 25 #ifndef _OCFS2_FS_H 26 #define _OCFS2_FS_H 27 28 /* Version */ 29 #define OCFS2_MAJOR_REV_LEVEL 0 30 #define OCFS2_MINOR_REV_LEVEL 90 31 32 /* 33 * An OCFS2 volume starts this way: 34 * Sector 0: Valid ocfs1_vol_disk_hdr that cleanly fails to mount OCFS. 35 * Sector 1: Valid ocfs1_vol_label that cleanly fails to mount OCFS. 36 * Block OCFS2_SUPER_BLOCK_BLKNO: OCFS2 superblock. 37 * 38 * All other structures are found from the superblock information. 39 * 40 * OCFS2_SUPER_BLOCK_BLKNO is in blocks, not sectors. eg, for a 41 * blocksize of 2K, it is 4096 bytes into disk. 42 */ 43 #define OCFS2_SUPER_BLOCK_BLKNO 2 44 45 /* 46 * Cluster size limits. The maximum is kept arbitrarily at 1 MB, and could 47 * grow if needed. 48 */ 49 #define OCFS2_MIN_CLUSTERSIZE 4096 50 #define OCFS2_MAX_CLUSTERSIZE 1048576 51 52 /* 53 * Blocks cannot be bigger than clusters, so the maximum blocksize is the 54 * minimum cluster size. 55 */ 56 #define OCFS2_MIN_BLOCKSIZE 512 57 #define OCFS2_MAX_BLOCKSIZE OCFS2_MIN_CLUSTERSIZE 58 59 /* Filesystem magic number */ 60 #define OCFS2_SUPER_MAGIC 0x7461636f 61 62 /* Object signatures */ 63 #define OCFS2_SUPER_BLOCK_SIGNATURE "OCFSV2" 64 #define OCFS2_INODE_SIGNATURE "INODE01" 65 #define OCFS2_EXTENT_BLOCK_SIGNATURE "EXBLK01" 66 #define OCFS2_GROUP_DESC_SIGNATURE "GROUP01" 67 68 /* Compatibility flags */ 69 #define OCFS2_HAS_COMPAT_FEATURE(sb,mask) \ 70 ( OCFS2_SB(sb)->s_feature_compat & (mask) ) 71 #define OCFS2_HAS_RO_COMPAT_FEATURE(sb,mask) \ 72 ( OCFS2_SB(sb)->s_feature_ro_compat & (mask) ) 73 #define OCFS2_HAS_INCOMPAT_FEATURE(sb,mask) \ 74 ( OCFS2_SB(sb)->s_feature_incompat & (mask) ) 75 #define OCFS2_SET_COMPAT_FEATURE(sb,mask) \ 76 OCFS2_SB(sb)->s_feature_compat |= (mask) 77 #define OCFS2_SET_RO_COMPAT_FEATURE(sb,mask) \ 78 OCFS2_SB(sb)->s_feature_ro_compat |= (mask) 79 #define OCFS2_SET_INCOMPAT_FEATURE(sb,mask) \ 80 OCFS2_SB(sb)->s_feature_incompat |= (mask) 81 #define OCFS2_CLEAR_COMPAT_FEATURE(sb,mask) \ 82 OCFS2_SB(sb)->s_feature_compat &= ~(mask) 83 #define OCFS2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \ 84 OCFS2_SB(sb)->s_feature_ro_compat &= ~(mask) 85 #define OCFS2_CLEAR_INCOMPAT_FEATURE(sb,mask) \ 86 OCFS2_SB(sb)->s_feature_incompat &= ~(mask) 87 88 #define OCFS2_FEATURE_COMPAT_SUPP 0 89 #define OCFS2_FEATURE_INCOMPAT_SUPP 0 90 #define OCFS2_FEATURE_RO_COMPAT_SUPP 0 91 92 /* 93 * Heartbeat-only devices are missing journals and other files. The 94 * filesystem driver can't load them, but the library can. Never put 95 * this in OCFS2_FEATURE_INCOMPAT_SUPP, *ever*. 96 */ 97 #define OCFS2_FEATURE_INCOMPAT_HEARTBEAT_DEV 0x0002 98 99 100 /* 101 * Flags on ocfs2_dinode.i_flags 102 */ 103 #define OCFS2_VALID_FL (0x00000001) /* Inode is valid */ 104 #define OCFS2_UNUSED2_FL (0x00000002) 105 #define OCFS2_ORPHANED_FL (0x00000004) /* On the orphan list */ 106 #define OCFS2_UNUSED3_FL (0x00000008) 107 /* System inode flags */ 108 #define OCFS2_SYSTEM_FL (0x00000010) /* System inode */ 109 #define OCFS2_SUPER_BLOCK_FL (0x00000020) /* Super block */ 110 #define OCFS2_LOCAL_ALLOC_FL (0x00000040) /* Slot local alloc bitmap */ 111 #define OCFS2_BITMAP_FL (0x00000080) /* Allocation bitmap */ 112 #define OCFS2_JOURNAL_FL (0x00000100) /* Slot local journal */ 113 #define OCFS2_HEARTBEAT_FL (0x00000200) /* Heartbeat area */ 114 #define OCFS2_CHAIN_FL (0x00000400) /* Chain allocator */ 115 #define OCFS2_DEALLOC_FL (0x00000800) /* Truncate log */ 116 117 /* 118 * Journal Flags (ocfs2_dinode.id1.journal1.i_flags) 119 */ 120 #define OCFS2_JOURNAL_DIRTY_FL (0x00000001) /* Journal needs recovery */ 121 122 /* 123 * superblock s_state flags 124 */ 125 #define OCFS2_ERROR_FS (0x00000001) /* FS saw errors */ 126 127 /* Limit of space in ocfs2_dir_entry */ 128 #define OCFS2_MAX_FILENAME_LEN 255 129 130 /* Maximum slots on an ocfs2 file system */ 131 #define OCFS2_MAX_SLOTS 255 132 133 /* Slot map indicator for an empty slot */ 134 #define OCFS2_INVALID_SLOT -1 135 136 #define OCFS2_VOL_UUID_LEN 16 137 #define OCFS2_MAX_VOL_LABEL_LEN 64 138 139 /* Journal limits (in bytes) */ 140 #define OCFS2_MIN_JOURNAL_SIZE (4 * 1024 * 1024) 141 142 struct ocfs2_system_inode_info { 143 char *si_name; 144 int si_iflags; 145 int si_mode; 146 }; 147 148 /* System file index */ 149 enum { 150 BAD_BLOCK_SYSTEM_INODE = 0, 151 GLOBAL_INODE_ALLOC_SYSTEM_INODE, 152 SLOT_MAP_SYSTEM_INODE, 153 #define OCFS2_FIRST_ONLINE_SYSTEM_INODE SLOT_MAP_SYSTEM_INODE 154 HEARTBEAT_SYSTEM_INODE, 155 GLOBAL_BITMAP_SYSTEM_INODE, 156 #define OCFS2_LAST_GLOBAL_SYSTEM_INODE GLOBAL_BITMAP_SYSTEM_INODE 157 ORPHAN_DIR_SYSTEM_INODE, 158 EXTENT_ALLOC_SYSTEM_INODE, 159 INODE_ALLOC_SYSTEM_INODE, 160 JOURNAL_SYSTEM_INODE, 161 LOCAL_ALLOC_SYSTEM_INODE, 162 TRUNCATE_LOG_SYSTEM_INODE, 163 NUM_SYSTEM_INODES 164 }; 165 166 static struct ocfs2_system_inode_info ocfs2_system_inodes[NUM_SYSTEM_INODES] = { 167 /* Global system inodes (single copy) */ 168 /* The first two are only used from userspace mfks/tunefs */ 169 [BAD_BLOCK_SYSTEM_INODE] = { "bad_blocks", 0, S_IFREG | 0644 }, 170 [GLOBAL_INODE_ALLOC_SYSTEM_INODE] = { "global_inode_alloc", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 }, 171 172 /* These are used by the running filesystem */ 173 [SLOT_MAP_SYSTEM_INODE] = { "slot_map", 0, S_IFREG | 0644 }, 174 [HEARTBEAT_SYSTEM_INODE] = { "heartbeat", OCFS2_HEARTBEAT_FL, S_IFREG | 0644 }, 175 [GLOBAL_BITMAP_SYSTEM_INODE] = { "global_bitmap", 0, S_IFREG | 0644 }, 176 177 /* Slot-specific system inodes (one copy per slot) */ 178 [ORPHAN_DIR_SYSTEM_INODE] = { "orphan_dir:%04d", 0, S_IFDIR | 0755 }, 179 [EXTENT_ALLOC_SYSTEM_INODE] = { "extent_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 }, 180 [INODE_ALLOC_SYSTEM_INODE] = { "inode_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 }, 181 [JOURNAL_SYSTEM_INODE] = { "journal:%04d", OCFS2_JOURNAL_FL, S_IFREG | 0644 }, 182 [LOCAL_ALLOC_SYSTEM_INODE] = { "local_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_LOCAL_ALLOC_FL, S_IFREG | 0644 }, 183 [TRUNCATE_LOG_SYSTEM_INODE] = { "truncate_log:%04d", OCFS2_DEALLOC_FL, S_IFREG | 0644 } 184 }; 185 186 /* Parameter passed from mount.ocfs2 to module */ 187 #define OCFS2_HB_NONE "heartbeat=none" 188 #define OCFS2_HB_LOCAL "heartbeat=local" 189 190 /* 191 * OCFS2 directory file types. Only the low 3 bits are used. The 192 * other bits are reserved for now. 193 */ 194 #define OCFS2_FT_UNKNOWN 0 195 #define OCFS2_FT_REG_FILE 1 196 #define OCFS2_FT_DIR 2 197 #define OCFS2_FT_CHRDEV 3 198 #define OCFS2_FT_BLKDEV 4 199 #define OCFS2_FT_FIFO 5 200 #define OCFS2_FT_SOCK 6 201 #define OCFS2_FT_SYMLINK 7 202 203 #define OCFS2_FT_MAX 8 204 205 /* 206 * OCFS2_DIR_PAD defines the directory entries boundaries 207 * 208 * NOTE: It must be a multiple of 4 209 */ 210 #define OCFS2_DIR_PAD 4 211 #define OCFS2_DIR_ROUND (OCFS2_DIR_PAD - 1) 212 #define OCFS2_DIR_MEMBER_LEN offsetof(struct ocfs2_dir_entry, name) 213 #define OCFS2_DIR_REC_LEN(name_len) (((name_len) + OCFS2_DIR_MEMBER_LEN + \ 214 OCFS2_DIR_ROUND) & \ 215 ~OCFS2_DIR_ROUND) 216 217 #define OCFS2_LINK_MAX 32000 218 219 #define S_SHIFT 12 220 static unsigned char ocfs2_type_by_mode[S_IFMT >> S_SHIFT] = { 221 [S_IFREG >> S_SHIFT] = OCFS2_FT_REG_FILE, 222 [S_IFDIR >> S_SHIFT] = OCFS2_FT_DIR, 223 [S_IFCHR >> S_SHIFT] = OCFS2_FT_CHRDEV, 224 [S_IFBLK >> S_SHIFT] = OCFS2_FT_BLKDEV, 225 [S_IFIFO >> S_SHIFT] = OCFS2_FT_FIFO, 226 [S_IFSOCK >> S_SHIFT] = OCFS2_FT_SOCK, 227 [S_IFLNK >> S_SHIFT] = OCFS2_FT_SYMLINK, 228 }; 229 230 231 /* 232 * Convenience casts 233 */ 234 #define OCFS2_RAW_SB(dinode) (&((dinode)->id2.i_super)) 235 236 /* 237 * On disk extent record for OCFS2 238 * It describes a range of clusters on disk. 239 */ 240 struct ocfs2_extent_rec { 241 /*00*/ __le32 e_cpos; /* Offset into the file, in clusters */ 242 __le32 e_clusters; /* Clusters covered by this extent */ 243 __le64 e_blkno; /* Physical disk offset, in blocks */ 244 /*10*/ 245 }; 246 247 struct ocfs2_chain_rec { 248 __le32 c_free; /* Number of free bits in this chain. */ 249 __le32 c_total; /* Number of total bits in this chain */ 250 __le64 c_blkno; /* Physical disk offset (blocks) of 1st group */ 251 }; 252 253 struct ocfs2_truncate_rec { 254 __le32 t_start; /* 1st cluster in this log */ 255 __le32 t_clusters; /* Number of total clusters covered */ 256 }; 257 258 /* 259 * On disk extent list for OCFS2 (node in the tree). Note that this 260 * is contained inside ocfs2_dinode or ocfs2_extent_block, so the 261 * offsets are relative to ocfs2_dinode.id2.i_list or 262 * ocfs2_extent_block.h_list, respectively. 263 */ 264 struct ocfs2_extent_list { 265 /*00*/ __le16 l_tree_depth; /* Extent tree depth from this 266 point. 0 means data extents 267 hang directly off this 268 header (a leaf) */ 269 __le16 l_count; /* Number of extent records */ 270 __le16 l_next_free_rec; /* Next unused extent slot */ 271 __le16 l_reserved1; 272 __le64 l_reserved2; /* Pad to 273 sizeof(ocfs2_extent_rec) */ 274 /*10*/ struct ocfs2_extent_rec l_recs[0]; /* Extent records */ 275 }; 276 277 /* 278 * On disk allocation chain list for OCFS2. Note that this is 279 * contained inside ocfs2_dinode, so the offsets are relative to 280 * ocfs2_dinode.id2.i_chain. 281 */ 282 struct ocfs2_chain_list { 283 /*00*/ __le16 cl_cpg; /* Clusters per Block Group */ 284 __le16 cl_bpc; /* Bits per cluster */ 285 __le16 cl_count; /* Total chains in this list */ 286 __le16 cl_next_free_rec; /* Next unused chain slot */ 287 __le64 cl_reserved1; 288 /*10*/ struct ocfs2_chain_rec cl_recs[0]; /* Chain records */ 289 }; 290 291 /* 292 * On disk deallocation log for OCFS2. Note that this is 293 * contained inside ocfs2_dinode, so the offsets are relative to 294 * ocfs2_dinode.id2.i_dealloc. 295 */ 296 struct ocfs2_truncate_log { 297 /*00*/ __le16 tl_count; /* Total records in this log */ 298 __le16 tl_used; /* Number of records in use */ 299 __le32 tl_reserved1; 300 /*08*/ struct ocfs2_truncate_rec tl_recs[0]; /* Truncate records */ 301 }; 302 303 /* 304 * On disk extent block (indirect block) for OCFS2 305 */ 306 struct ocfs2_extent_block 307 { 308 /*00*/ __u8 h_signature[8]; /* Signature for verification */ 309 __le64 h_reserved1; 310 /*10*/ __le16 h_suballoc_slot; /* Slot suballocator this 311 extent_header belongs to */ 312 __le16 h_suballoc_bit; /* Bit offset in suballocator 313 block group */ 314 __le32 h_fs_generation; /* Must match super block */ 315 __le64 h_blkno; /* Offset on disk, in blocks */ 316 /*20*/ __le64 h_reserved3; 317 __le64 h_next_leaf_blk; /* Offset on disk, in blocks, 318 of next leaf header pointing 319 to data */ 320 /*30*/ struct ocfs2_extent_list h_list; /* Extent record list */ 321 /* Actual on-disk size is one block */ 322 }; 323 324 /* 325 * On disk superblock for OCFS2 326 * Note that it is contained inside an ocfs2_dinode, so all offsets 327 * are relative to the start of ocfs2_dinode.id2. 328 */ 329 struct ocfs2_super_block { 330 /*00*/ __le16 s_major_rev_level; 331 __le16 s_minor_rev_level; 332 __le16 s_mnt_count; 333 __le16 s_max_mnt_count; 334 __le16 s_state; /* File system state */ 335 __le16 s_errors; /* Behaviour when detecting errors */ 336 __le32 s_checkinterval; /* Max time between checks */ 337 /*10*/ __le64 s_lastcheck; /* Time of last check */ 338 __le32 s_creator_os; /* OS */ 339 __le32 s_feature_compat; /* Compatible feature set */ 340 /*20*/ __le32 s_feature_incompat; /* Incompatible feature set */ 341 __le32 s_feature_ro_compat; /* Readonly-compatible feature set */ 342 __le64 s_root_blkno; /* Offset, in blocks, of root directory 343 dinode */ 344 /*30*/ __le64 s_system_dir_blkno; /* Offset, in blocks, of system 345 directory dinode */ 346 __le32 s_blocksize_bits; /* Blocksize for this fs */ 347 __le32 s_clustersize_bits; /* Clustersize for this fs */ 348 /*40*/ __le16 s_max_slots; /* Max number of simultaneous mounts 349 before tunefs required */ 350 __le16 s_reserved1; 351 __le32 s_reserved2; 352 __le64 s_first_cluster_group; /* Block offset of 1st cluster 353 * group header */ 354 /*50*/ __u8 s_label[OCFS2_MAX_VOL_LABEL_LEN]; /* Label for mounting, etc. */ 355 /*90*/ __u8 s_uuid[OCFS2_VOL_UUID_LEN]; /* 128-bit uuid */ 356 /*A0*/ 357 }; 358 359 /* 360 * Local allocation bitmap for OCFS2 slots 361 * Note that it exists inside an ocfs2_dinode, so all offsets are 362 * relative to the start of ocfs2_dinode.id2. 363 */ 364 struct ocfs2_local_alloc 365 { 366 /*00*/ __le32 la_bm_off; /* Starting bit offset in main bitmap */ 367 __le16 la_size; /* Size of included bitmap, in bytes */ 368 __le16 la_reserved1; 369 __le64 la_reserved2; 370 /*10*/ __u8 la_bitmap[0]; 371 }; 372 373 /* 374 * On disk inode for OCFS2 375 */ 376 struct ocfs2_dinode { 377 /*00*/ __u8 i_signature[8]; /* Signature for validation */ 378 __le32 i_generation; /* Generation number */ 379 __le16 i_suballoc_slot; /* Slot suballocator this inode 380 belongs to */ 381 __le16 i_suballoc_bit; /* Bit offset in suballocator 382 block group */ 383 /*10*/ __le32 i_reserved0; 384 __le32 i_clusters; /* Cluster count */ 385 __le32 i_uid; /* Owner UID */ 386 __le32 i_gid; /* Owning GID */ 387 /*20*/ __le64 i_size; /* Size in bytes */ 388 __le16 i_mode; /* File mode */ 389 __le16 i_links_count; /* Links count */ 390 __le32 i_flags; /* File flags */ 391 /*30*/ __le64 i_atime; /* Access time */ 392 __le64 i_ctime; /* Creation time */ 393 /*40*/ __le64 i_mtime; /* Modification time */ 394 __le64 i_dtime; /* Deletion time */ 395 /*50*/ __le64 i_blkno; /* Offset on disk, in blocks */ 396 __le64 i_last_eb_blk; /* Pointer to last extent 397 block */ 398 /*60*/ __le32 i_fs_generation; /* Generation per fs-instance */ 399 __le32 i_atime_nsec; 400 __le32 i_ctime_nsec; 401 __le32 i_mtime_nsec; 402 /*70*/ __le64 i_reserved1[9]; 403 /*B8*/ union { 404 __le64 i_pad1; /* Generic way to refer to this 405 64bit union */ 406 struct { 407 __le64 i_rdev; /* Device number */ 408 } dev1; 409 struct { /* Info for bitmap system 410 inodes */ 411 __le32 i_used; /* Bits (ie, clusters) used */ 412 __le32 i_total; /* Total bits (clusters) 413 available */ 414 } bitmap1; 415 struct { /* Info for journal system 416 inodes */ 417 __le32 ij_flags; /* Mounted, version, etc. */ 418 __le32 ij_pad; 419 } journal1; 420 } id1; /* Inode type dependant 1 */ 421 /*C0*/ union { 422 struct ocfs2_super_block i_super; 423 struct ocfs2_local_alloc i_lab; 424 struct ocfs2_chain_list i_chain; 425 struct ocfs2_extent_list i_list; 426 struct ocfs2_truncate_log i_dealloc; 427 __u8 i_symlink[0]; 428 } id2; 429 /* Actual on-disk size is one block */ 430 }; 431 432 /* 433 * On-disk directory entry structure for OCFS2 434 * 435 * Packed as this structure could be accessed unaligned on 64-bit platforms 436 */ 437 struct ocfs2_dir_entry { 438 /*00*/ __le64 inode; /* Inode number */ 439 __le16 rec_len; /* Directory entry length */ 440 __u8 name_len; /* Name length */ 441 __u8 file_type; 442 /*0C*/ char name[OCFS2_MAX_FILENAME_LEN]; /* File name */ 443 /* Actual on-disk length specified by rec_len */ 444 } __attribute__ ((packed)); 445 446 /* 447 * On disk allocator group structure for OCFS2 448 */ 449 struct ocfs2_group_desc 450 { 451 /*00*/ __u8 bg_signature[8]; /* Signature for validation */ 452 __le16 bg_size; /* Size of included bitmap in 453 bytes. */ 454 __le16 bg_bits; /* Bits represented by this 455 group. */ 456 __le16 bg_free_bits_count; /* Free bits count */ 457 __le16 bg_chain; /* What chain I am in. */ 458 /*10*/ __le32 bg_generation; 459 __le32 bg_reserved1; 460 __le64 bg_next_group; /* Next group in my list, in 461 blocks */ 462 /*20*/ __le64 bg_parent_dinode; /* dinode which owns me, in 463 blocks */ 464 __le64 bg_blkno; /* Offset on disk, in blocks */ 465 /*30*/ __le64 bg_reserved2[2]; 466 /*40*/ __u8 bg_bitmap[0]; 467 }; 468 469 #ifdef __KERNEL__ 470 static inline int ocfs2_fast_symlink_chars(struct super_block *sb) 471 { 472 return sb->s_blocksize - 473 offsetof(struct ocfs2_dinode, id2.i_symlink); 474 } 475 476 static inline int ocfs2_extent_recs_per_inode(struct super_block *sb) 477 { 478 int size; 479 480 size = sb->s_blocksize - 481 offsetof(struct ocfs2_dinode, id2.i_list.l_recs); 482 483 return size / sizeof(struct ocfs2_extent_rec); 484 } 485 486 static inline int ocfs2_chain_recs_per_inode(struct super_block *sb) 487 { 488 int size; 489 490 size = sb->s_blocksize - 491 offsetof(struct ocfs2_dinode, id2.i_chain.cl_recs); 492 493 return size / sizeof(struct ocfs2_chain_rec); 494 } 495 496 static inline u16 ocfs2_extent_recs_per_eb(struct super_block *sb) 497 { 498 int size; 499 500 size = sb->s_blocksize - 501 offsetof(struct ocfs2_extent_block, h_list.l_recs); 502 503 return size / sizeof(struct ocfs2_extent_rec); 504 } 505 506 static inline u16 ocfs2_local_alloc_size(struct super_block *sb) 507 { 508 u16 size; 509 510 size = sb->s_blocksize - 511 offsetof(struct ocfs2_dinode, id2.i_lab.la_bitmap); 512 513 return size; 514 } 515 516 static inline int ocfs2_group_bitmap_size(struct super_block *sb) 517 { 518 int size; 519 520 size = sb->s_blocksize - 521 offsetof(struct ocfs2_group_desc, bg_bitmap); 522 523 return size; 524 } 525 526 static inline int ocfs2_truncate_recs_per_inode(struct super_block *sb) 527 { 528 int size; 529 530 size = sb->s_blocksize - 531 offsetof(struct ocfs2_dinode, id2.i_dealloc.tl_recs); 532 533 return size / sizeof(struct ocfs2_truncate_rec); 534 } 535 #else 536 static inline int ocfs2_fast_symlink_chars(int blocksize) 537 { 538 return blocksize - offsetof(struct ocfs2_dinode, id2.i_symlink); 539 } 540 541 static inline int ocfs2_extent_recs_per_inode(int blocksize) 542 { 543 int size; 544 545 size = blocksize - 546 offsetof(struct ocfs2_dinode, id2.i_list.l_recs); 547 548 return size / sizeof(struct ocfs2_extent_rec); 549 } 550 551 static inline int ocfs2_chain_recs_per_inode(int blocksize) 552 { 553 int size; 554 555 size = blocksize - 556 offsetof(struct ocfs2_dinode, id2.i_chain.cl_recs); 557 558 return size / sizeof(struct ocfs2_chain_rec); 559 } 560 561 static inline int ocfs2_extent_recs_per_eb(int blocksize) 562 { 563 int size; 564 565 size = blocksize - 566 offsetof(struct ocfs2_extent_block, h_list.l_recs); 567 568 return size / sizeof(struct ocfs2_extent_rec); 569 } 570 571 static inline int ocfs2_local_alloc_size(int blocksize) 572 { 573 int size; 574 575 size = blocksize - 576 offsetof(struct ocfs2_dinode, id2.i_lab.la_bitmap); 577 578 return size; 579 } 580 581 static inline int ocfs2_group_bitmap_size(int blocksize) 582 { 583 int size; 584 585 size = blocksize - 586 offsetof(struct ocfs2_group_desc, bg_bitmap); 587 588 return size; 589 } 590 591 static inline int ocfs2_truncate_recs_per_inode(int blocksize) 592 { 593 int size; 594 595 size = blocksize - 596 offsetof(struct ocfs2_dinode, id2.i_dealloc.tl_recs); 597 598 return size / sizeof(struct ocfs2_truncate_rec); 599 } 600 #endif /* __KERNEL__ */ 601 602 603 static inline int ocfs2_system_inode_is_global(int type) 604 { 605 return ((type >= 0) && 606 (type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE)); 607 } 608 609 static inline int ocfs2_sprintf_system_inode_name(char *buf, int len, 610 int type, int slot) 611 { 612 int chars; 613 614 /* 615 * Global system inodes can only have one copy. Everything 616 * after OCFS2_LAST_GLOBAL_SYSTEM_INODE in the system inode 617 * list has a copy per slot. 618 */ 619 if (type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE) 620 chars = snprintf(buf, len, 621 ocfs2_system_inodes[type].si_name); 622 else 623 chars = snprintf(buf, len, 624 ocfs2_system_inodes[type].si_name, 625 slot); 626 627 return chars; 628 } 629 630 static inline void ocfs2_set_de_type(struct ocfs2_dir_entry *de, 631 umode_t mode) 632 { 633 de->file_type = ocfs2_type_by_mode[(mode & S_IFMT)>>S_SHIFT]; 634 } 635 636 #endif /* _OCFS2_FS_H */ 637 638