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 /* Inode attributes, keep in sync with EXT2 */ 118 #define OCFS2_SECRM_FL (0x00000001) /* Secure deletion */ 119 #define OCFS2_UNRM_FL (0x00000002) /* Undelete */ 120 #define OCFS2_COMPR_FL (0x00000004) /* Compress file */ 121 #define OCFS2_SYNC_FL (0x00000008) /* Synchronous updates */ 122 #define OCFS2_IMMUTABLE_FL (0x00000010) /* Immutable file */ 123 #define OCFS2_APPEND_FL (0x00000020) /* writes to file may only append */ 124 #define OCFS2_NODUMP_FL (0x00000040) /* do not dump file */ 125 #define OCFS2_NOATIME_FL (0x00000080) /* do not update atime */ 126 #define OCFS2_DIRSYNC_FL (0x00010000) /* dirsync behaviour (directories only) */ 127 128 #define OCFS2_FL_VISIBLE (0x000100FF) /* User visible flags */ 129 #define OCFS2_FL_MODIFIABLE (0x000100FF) /* User modifiable flags */ 130 131 /* 132 * ioctl commands 133 */ 134 #define OCFS2_IOC_GETFLAGS _IOR('f', 1, long) 135 #define OCFS2_IOC_SETFLAGS _IOW('f', 2, long) 136 137 /* 138 * Journal Flags (ocfs2_dinode.id1.journal1.i_flags) 139 */ 140 #define OCFS2_JOURNAL_DIRTY_FL (0x00000001) /* Journal needs recovery */ 141 142 /* 143 * superblock s_state flags 144 */ 145 #define OCFS2_ERROR_FS (0x00000001) /* FS saw errors */ 146 147 /* Limit of space in ocfs2_dir_entry */ 148 #define OCFS2_MAX_FILENAME_LEN 255 149 150 /* Maximum slots on an ocfs2 file system */ 151 #define OCFS2_MAX_SLOTS 255 152 153 /* Slot map indicator for an empty slot */ 154 #define OCFS2_INVALID_SLOT -1 155 156 #define OCFS2_VOL_UUID_LEN 16 157 #define OCFS2_MAX_VOL_LABEL_LEN 64 158 159 /* Journal limits (in bytes) */ 160 #define OCFS2_MIN_JOURNAL_SIZE (4 * 1024 * 1024) 161 162 struct ocfs2_system_inode_info { 163 char *si_name; 164 int si_iflags; 165 int si_mode; 166 }; 167 168 /* System file index */ 169 enum { 170 BAD_BLOCK_SYSTEM_INODE = 0, 171 GLOBAL_INODE_ALLOC_SYSTEM_INODE, 172 SLOT_MAP_SYSTEM_INODE, 173 #define OCFS2_FIRST_ONLINE_SYSTEM_INODE SLOT_MAP_SYSTEM_INODE 174 HEARTBEAT_SYSTEM_INODE, 175 GLOBAL_BITMAP_SYSTEM_INODE, 176 #define OCFS2_LAST_GLOBAL_SYSTEM_INODE GLOBAL_BITMAP_SYSTEM_INODE 177 ORPHAN_DIR_SYSTEM_INODE, 178 EXTENT_ALLOC_SYSTEM_INODE, 179 INODE_ALLOC_SYSTEM_INODE, 180 JOURNAL_SYSTEM_INODE, 181 LOCAL_ALLOC_SYSTEM_INODE, 182 TRUNCATE_LOG_SYSTEM_INODE, 183 NUM_SYSTEM_INODES 184 }; 185 186 static struct ocfs2_system_inode_info ocfs2_system_inodes[NUM_SYSTEM_INODES] = { 187 /* Global system inodes (single copy) */ 188 /* The first two are only used from userspace mfks/tunefs */ 189 [BAD_BLOCK_SYSTEM_INODE] = { "bad_blocks", 0, S_IFREG | 0644 }, 190 [GLOBAL_INODE_ALLOC_SYSTEM_INODE] = { "global_inode_alloc", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 }, 191 192 /* These are used by the running filesystem */ 193 [SLOT_MAP_SYSTEM_INODE] = { "slot_map", 0, S_IFREG | 0644 }, 194 [HEARTBEAT_SYSTEM_INODE] = { "heartbeat", OCFS2_HEARTBEAT_FL, S_IFREG | 0644 }, 195 [GLOBAL_BITMAP_SYSTEM_INODE] = { "global_bitmap", 0, S_IFREG | 0644 }, 196 197 /* Slot-specific system inodes (one copy per slot) */ 198 [ORPHAN_DIR_SYSTEM_INODE] = { "orphan_dir:%04d", 0, S_IFDIR | 0755 }, 199 [EXTENT_ALLOC_SYSTEM_INODE] = { "extent_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 }, 200 [INODE_ALLOC_SYSTEM_INODE] = { "inode_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 }, 201 [JOURNAL_SYSTEM_INODE] = { "journal:%04d", OCFS2_JOURNAL_FL, S_IFREG | 0644 }, 202 [LOCAL_ALLOC_SYSTEM_INODE] = { "local_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_LOCAL_ALLOC_FL, S_IFREG | 0644 }, 203 [TRUNCATE_LOG_SYSTEM_INODE] = { "truncate_log:%04d", OCFS2_DEALLOC_FL, S_IFREG | 0644 } 204 }; 205 206 /* Parameter passed from mount.ocfs2 to module */ 207 #define OCFS2_HB_NONE "heartbeat=none" 208 #define OCFS2_HB_LOCAL "heartbeat=local" 209 210 /* 211 * OCFS2 directory file types. Only the low 3 bits are used. The 212 * other bits are reserved for now. 213 */ 214 #define OCFS2_FT_UNKNOWN 0 215 #define OCFS2_FT_REG_FILE 1 216 #define OCFS2_FT_DIR 2 217 #define OCFS2_FT_CHRDEV 3 218 #define OCFS2_FT_BLKDEV 4 219 #define OCFS2_FT_FIFO 5 220 #define OCFS2_FT_SOCK 6 221 #define OCFS2_FT_SYMLINK 7 222 223 #define OCFS2_FT_MAX 8 224 225 /* 226 * OCFS2_DIR_PAD defines the directory entries boundaries 227 * 228 * NOTE: It must be a multiple of 4 229 */ 230 #define OCFS2_DIR_PAD 4 231 #define OCFS2_DIR_ROUND (OCFS2_DIR_PAD - 1) 232 #define OCFS2_DIR_MEMBER_LEN offsetof(struct ocfs2_dir_entry, name) 233 #define OCFS2_DIR_REC_LEN(name_len) (((name_len) + OCFS2_DIR_MEMBER_LEN + \ 234 OCFS2_DIR_ROUND) & \ 235 ~OCFS2_DIR_ROUND) 236 237 #define OCFS2_LINK_MAX 32000 238 239 #define S_SHIFT 12 240 static unsigned char ocfs2_type_by_mode[S_IFMT >> S_SHIFT] = { 241 [S_IFREG >> S_SHIFT] = OCFS2_FT_REG_FILE, 242 [S_IFDIR >> S_SHIFT] = OCFS2_FT_DIR, 243 [S_IFCHR >> S_SHIFT] = OCFS2_FT_CHRDEV, 244 [S_IFBLK >> S_SHIFT] = OCFS2_FT_BLKDEV, 245 [S_IFIFO >> S_SHIFT] = OCFS2_FT_FIFO, 246 [S_IFSOCK >> S_SHIFT] = OCFS2_FT_SOCK, 247 [S_IFLNK >> S_SHIFT] = OCFS2_FT_SYMLINK, 248 }; 249 250 251 /* 252 * Convenience casts 253 */ 254 #define OCFS2_RAW_SB(dinode) (&((dinode)->id2.i_super)) 255 256 /* 257 * On disk extent record for OCFS2 258 * It describes a range of clusters on disk. 259 */ 260 struct ocfs2_extent_rec { 261 /*00*/ __le32 e_cpos; /* Offset into the file, in clusters */ 262 __le32 e_clusters; /* Clusters covered by this extent */ 263 __le64 e_blkno; /* Physical disk offset, in blocks */ 264 /*10*/ 265 }; 266 267 struct ocfs2_chain_rec { 268 __le32 c_free; /* Number of free bits in this chain. */ 269 __le32 c_total; /* Number of total bits in this chain */ 270 __le64 c_blkno; /* Physical disk offset (blocks) of 1st group */ 271 }; 272 273 struct ocfs2_truncate_rec { 274 __le32 t_start; /* 1st cluster in this log */ 275 __le32 t_clusters; /* Number of total clusters covered */ 276 }; 277 278 /* 279 * On disk extent list for OCFS2 (node in the tree). Note that this 280 * is contained inside ocfs2_dinode or ocfs2_extent_block, so the 281 * offsets are relative to ocfs2_dinode.id2.i_list or 282 * ocfs2_extent_block.h_list, respectively. 283 */ 284 struct ocfs2_extent_list { 285 /*00*/ __le16 l_tree_depth; /* Extent tree depth from this 286 point. 0 means data extents 287 hang directly off this 288 header (a leaf) */ 289 __le16 l_count; /* Number of extent records */ 290 __le16 l_next_free_rec; /* Next unused extent slot */ 291 __le16 l_reserved1; 292 __le64 l_reserved2; /* Pad to 293 sizeof(ocfs2_extent_rec) */ 294 /*10*/ struct ocfs2_extent_rec l_recs[0]; /* Extent records */ 295 }; 296 297 /* 298 * On disk allocation chain list for OCFS2. Note that this is 299 * contained inside ocfs2_dinode, so the offsets are relative to 300 * ocfs2_dinode.id2.i_chain. 301 */ 302 struct ocfs2_chain_list { 303 /*00*/ __le16 cl_cpg; /* Clusters per Block Group */ 304 __le16 cl_bpc; /* Bits per cluster */ 305 __le16 cl_count; /* Total chains in this list */ 306 __le16 cl_next_free_rec; /* Next unused chain slot */ 307 __le64 cl_reserved1; 308 /*10*/ struct ocfs2_chain_rec cl_recs[0]; /* Chain records */ 309 }; 310 311 /* 312 * On disk deallocation log for OCFS2. Note that this is 313 * contained inside ocfs2_dinode, so the offsets are relative to 314 * ocfs2_dinode.id2.i_dealloc. 315 */ 316 struct ocfs2_truncate_log { 317 /*00*/ __le16 tl_count; /* Total records in this log */ 318 __le16 tl_used; /* Number of records in use */ 319 __le32 tl_reserved1; 320 /*08*/ struct ocfs2_truncate_rec tl_recs[0]; /* Truncate records */ 321 }; 322 323 /* 324 * On disk extent block (indirect block) for OCFS2 325 */ 326 struct ocfs2_extent_block 327 { 328 /*00*/ __u8 h_signature[8]; /* Signature for verification */ 329 __le64 h_reserved1; 330 /*10*/ __le16 h_suballoc_slot; /* Slot suballocator this 331 extent_header belongs to */ 332 __le16 h_suballoc_bit; /* Bit offset in suballocator 333 block group */ 334 __le32 h_fs_generation; /* Must match super block */ 335 __le64 h_blkno; /* Offset on disk, in blocks */ 336 /*20*/ __le64 h_reserved3; 337 __le64 h_next_leaf_blk; /* Offset on disk, in blocks, 338 of next leaf header pointing 339 to data */ 340 /*30*/ struct ocfs2_extent_list h_list; /* Extent record list */ 341 /* Actual on-disk size is one block */ 342 }; 343 344 /* 345 * On disk superblock for OCFS2 346 * Note that it is contained inside an ocfs2_dinode, so all offsets 347 * are relative to the start of ocfs2_dinode.id2. 348 */ 349 struct ocfs2_super_block { 350 /*00*/ __le16 s_major_rev_level; 351 __le16 s_minor_rev_level; 352 __le16 s_mnt_count; 353 __le16 s_max_mnt_count; 354 __le16 s_state; /* File system state */ 355 __le16 s_errors; /* Behaviour when detecting errors */ 356 __le32 s_checkinterval; /* Max time between checks */ 357 /*10*/ __le64 s_lastcheck; /* Time of last check */ 358 __le32 s_creator_os; /* OS */ 359 __le32 s_feature_compat; /* Compatible feature set */ 360 /*20*/ __le32 s_feature_incompat; /* Incompatible feature set */ 361 __le32 s_feature_ro_compat; /* Readonly-compatible feature set */ 362 __le64 s_root_blkno; /* Offset, in blocks, of root directory 363 dinode */ 364 /*30*/ __le64 s_system_dir_blkno; /* Offset, in blocks, of system 365 directory dinode */ 366 __le32 s_blocksize_bits; /* Blocksize for this fs */ 367 __le32 s_clustersize_bits; /* Clustersize for this fs */ 368 /*40*/ __le16 s_max_slots; /* Max number of simultaneous mounts 369 before tunefs required */ 370 __le16 s_reserved1; 371 __le32 s_reserved2; 372 __le64 s_first_cluster_group; /* Block offset of 1st cluster 373 * group header */ 374 /*50*/ __u8 s_label[OCFS2_MAX_VOL_LABEL_LEN]; /* Label for mounting, etc. */ 375 /*90*/ __u8 s_uuid[OCFS2_VOL_UUID_LEN]; /* 128-bit uuid */ 376 /*A0*/ 377 }; 378 379 /* 380 * Local allocation bitmap for OCFS2 slots 381 * Note that it exists inside an ocfs2_dinode, so all offsets are 382 * relative to the start of ocfs2_dinode.id2. 383 */ 384 struct ocfs2_local_alloc 385 { 386 /*00*/ __le32 la_bm_off; /* Starting bit offset in main bitmap */ 387 __le16 la_size; /* Size of included bitmap, in bytes */ 388 __le16 la_reserved1; 389 __le64 la_reserved2; 390 /*10*/ __u8 la_bitmap[0]; 391 }; 392 393 /* 394 * On disk inode for OCFS2 395 */ 396 struct ocfs2_dinode { 397 /*00*/ __u8 i_signature[8]; /* Signature for validation */ 398 __le32 i_generation; /* Generation number */ 399 __le16 i_suballoc_slot; /* Slot suballocator this inode 400 belongs to */ 401 __le16 i_suballoc_bit; /* Bit offset in suballocator 402 block group */ 403 /*10*/ __le32 i_reserved0; 404 __le32 i_clusters; /* Cluster count */ 405 __le32 i_uid; /* Owner UID */ 406 __le32 i_gid; /* Owning GID */ 407 /*20*/ __le64 i_size; /* Size in bytes */ 408 __le16 i_mode; /* File mode */ 409 __le16 i_links_count; /* Links count */ 410 __le32 i_flags; /* File flags */ 411 /*30*/ __le64 i_atime; /* Access time */ 412 __le64 i_ctime; /* Creation time */ 413 /*40*/ __le64 i_mtime; /* Modification time */ 414 __le64 i_dtime; /* Deletion time */ 415 /*50*/ __le64 i_blkno; /* Offset on disk, in blocks */ 416 __le64 i_last_eb_blk; /* Pointer to last extent 417 block */ 418 /*60*/ __le32 i_fs_generation; /* Generation per fs-instance */ 419 __le32 i_atime_nsec; 420 __le32 i_ctime_nsec; 421 __le32 i_mtime_nsec; 422 __le32 i_attr; 423 __le32 i_reserved1; 424 /*70*/ __le64 i_reserved2[8]; 425 /*B8*/ union { 426 __le64 i_pad1; /* Generic way to refer to this 427 64bit union */ 428 struct { 429 __le64 i_rdev; /* Device number */ 430 } dev1; 431 struct { /* Info for bitmap system 432 inodes */ 433 __le32 i_used; /* Bits (ie, clusters) used */ 434 __le32 i_total; /* Total bits (clusters) 435 available */ 436 } bitmap1; 437 struct { /* Info for journal system 438 inodes */ 439 __le32 ij_flags; /* Mounted, version, etc. */ 440 __le32 ij_pad; 441 } journal1; 442 } id1; /* Inode type dependant 1 */ 443 /*C0*/ union { 444 struct ocfs2_super_block i_super; 445 struct ocfs2_local_alloc i_lab; 446 struct ocfs2_chain_list i_chain; 447 struct ocfs2_extent_list i_list; 448 struct ocfs2_truncate_log i_dealloc; 449 __u8 i_symlink[0]; 450 } id2; 451 /* Actual on-disk size is one block */ 452 }; 453 454 /* 455 * On-disk directory entry structure for OCFS2 456 * 457 * Packed as this structure could be accessed unaligned on 64-bit platforms 458 */ 459 struct ocfs2_dir_entry { 460 /*00*/ __le64 inode; /* Inode number */ 461 __le16 rec_len; /* Directory entry length */ 462 __u8 name_len; /* Name length */ 463 __u8 file_type; 464 /*0C*/ char name[OCFS2_MAX_FILENAME_LEN]; /* File name */ 465 /* Actual on-disk length specified by rec_len */ 466 } __attribute__ ((packed)); 467 468 /* 469 * On disk allocator group structure for OCFS2 470 */ 471 struct ocfs2_group_desc 472 { 473 /*00*/ __u8 bg_signature[8]; /* Signature for validation */ 474 __le16 bg_size; /* Size of included bitmap in 475 bytes. */ 476 __le16 bg_bits; /* Bits represented by this 477 group. */ 478 __le16 bg_free_bits_count; /* Free bits count */ 479 __le16 bg_chain; /* What chain I am in. */ 480 /*10*/ __le32 bg_generation; 481 __le32 bg_reserved1; 482 __le64 bg_next_group; /* Next group in my list, in 483 blocks */ 484 /*20*/ __le64 bg_parent_dinode; /* dinode which owns me, in 485 blocks */ 486 __le64 bg_blkno; /* Offset on disk, in blocks */ 487 /*30*/ __le64 bg_reserved2[2]; 488 /*40*/ __u8 bg_bitmap[0]; 489 }; 490 491 #ifdef __KERNEL__ 492 static inline int ocfs2_fast_symlink_chars(struct super_block *sb) 493 { 494 return sb->s_blocksize - 495 offsetof(struct ocfs2_dinode, id2.i_symlink); 496 } 497 498 static inline int ocfs2_extent_recs_per_inode(struct super_block *sb) 499 { 500 int size; 501 502 size = sb->s_blocksize - 503 offsetof(struct ocfs2_dinode, id2.i_list.l_recs); 504 505 return size / sizeof(struct ocfs2_extent_rec); 506 } 507 508 static inline int ocfs2_chain_recs_per_inode(struct super_block *sb) 509 { 510 int size; 511 512 size = sb->s_blocksize - 513 offsetof(struct ocfs2_dinode, id2.i_chain.cl_recs); 514 515 return size / sizeof(struct ocfs2_chain_rec); 516 } 517 518 static inline u16 ocfs2_extent_recs_per_eb(struct super_block *sb) 519 { 520 int size; 521 522 size = sb->s_blocksize - 523 offsetof(struct ocfs2_extent_block, h_list.l_recs); 524 525 return size / sizeof(struct ocfs2_extent_rec); 526 } 527 528 static inline u16 ocfs2_local_alloc_size(struct super_block *sb) 529 { 530 u16 size; 531 532 size = sb->s_blocksize - 533 offsetof(struct ocfs2_dinode, id2.i_lab.la_bitmap); 534 535 return size; 536 } 537 538 static inline int ocfs2_group_bitmap_size(struct super_block *sb) 539 { 540 int size; 541 542 size = sb->s_blocksize - 543 offsetof(struct ocfs2_group_desc, bg_bitmap); 544 545 return size; 546 } 547 548 static inline int ocfs2_truncate_recs_per_inode(struct super_block *sb) 549 { 550 int size; 551 552 size = sb->s_blocksize - 553 offsetof(struct ocfs2_dinode, id2.i_dealloc.tl_recs); 554 555 return size / sizeof(struct ocfs2_truncate_rec); 556 } 557 #else 558 static inline int ocfs2_fast_symlink_chars(int blocksize) 559 { 560 return blocksize - offsetof(struct ocfs2_dinode, id2.i_symlink); 561 } 562 563 static inline int ocfs2_extent_recs_per_inode(int blocksize) 564 { 565 int size; 566 567 size = blocksize - 568 offsetof(struct ocfs2_dinode, id2.i_list.l_recs); 569 570 return size / sizeof(struct ocfs2_extent_rec); 571 } 572 573 static inline int ocfs2_chain_recs_per_inode(int blocksize) 574 { 575 int size; 576 577 size = blocksize - 578 offsetof(struct ocfs2_dinode, id2.i_chain.cl_recs); 579 580 return size / sizeof(struct ocfs2_chain_rec); 581 } 582 583 static inline int ocfs2_extent_recs_per_eb(int blocksize) 584 { 585 int size; 586 587 size = blocksize - 588 offsetof(struct ocfs2_extent_block, h_list.l_recs); 589 590 return size / sizeof(struct ocfs2_extent_rec); 591 } 592 593 static inline int ocfs2_local_alloc_size(int blocksize) 594 { 595 int size; 596 597 size = blocksize - 598 offsetof(struct ocfs2_dinode, id2.i_lab.la_bitmap); 599 600 return size; 601 } 602 603 static inline int ocfs2_group_bitmap_size(int blocksize) 604 { 605 int size; 606 607 size = blocksize - 608 offsetof(struct ocfs2_group_desc, bg_bitmap); 609 610 return size; 611 } 612 613 static inline int ocfs2_truncate_recs_per_inode(int blocksize) 614 { 615 int size; 616 617 size = blocksize - 618 offsetof(struct ocfs2_dinode, id2.i_dealloc.tl_recs); 619 620 return size / sizeof(struct ocfs2_truncate_rec); 621 } 622 #endif /* __KERNEL__ */ 623 624 625 static inline int ocfs2_system_inode_is_global(int type) 626 { 627 return ((type >= 0) && 628 (type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE)); 629 } 630 631 static inline int ocfs2_sprintf_system_inode_name(char *buf, int len, 632 int type, int slot) 633 { 634 int chars; 635 636 /* 637 * Global system inodes can only have one copy. Everything 638 * after OCFS2_LAST_GLOBAL_SYSTEM_INODE in the system inode 639 * list has a copy per slot. 640 */ 641 if (type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE) 642 chars = snprintf(buf, len, 643 ocfs2_system_inodes[type].si_name); 644 else 645 chars = snprintf(buf, len, 646 ocfs2_system_inodes[type].si_name, 647 slot); 648 649 return chars; 650 } 651 652 static inline void ocfs2_set_de_type(struct ocfs2_dir_entry *de, 653 umode_t mode) 654 { 655 de->file_type = ocfs2_type_by_mode[(mode & S_IFMT)>>S_SHIFT]; 656 } 657 658 #endif /* _OCFS2_FS_H */ 659 660