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 #define OCFS2_XATTR_BLOCK_SIGNATURE "XATTR01" 68 #define OCFS2_DIR_TRAILER_SIGNATURE "DIRTRL1" 69 70 /* Compatibility flags */ 71 #define OCFS2_HAS_COMPAT_FEATURE(sb,mask) \ 72 ( OCFS2_SB(sb)->s_feature_compat & (mask) ) 73 #define OCFS2_HAS_RO_COMPAT_FEATURE(sb,mask) \ 74 ( OCFS2_SB(sb)->s_feature_ro_compat & (mask) ) 75 #define OCFS2_HAS_INCOMPAT_FEATURE(sb,mask) \ 76 ( OCFS2_SB(sb)->s_feature_incompat & (mask) ) 77 #define OCFS2_SET_COMPAT_FEATURE(sb,mask) \ 78 OCFS2_SB(sb)->s_feature_compat |= (mask) 79 #define OCFS2_SET_RO_COMPAT_FEATURE(sb,mask) \ 80 OCFS2_SB(sb)->s_feature_ro_compat |= (mask) 81 #define OCFS2_SET_INCOMPAT_FEATURE(sb,mask) \ 82 OCFS2_SB(sb)->s_feature_incompat |= (mask) 83 #define OCFS2_CLEAR_COMPAT_FEATURE(sb,mask) \ 84 OCFS2_SB(sb)->s_feature_compat &= ~(mask) 85 #define OCFS2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \ 86 OCFS2_SB(sb)->s_feature_ro_compat &= ~(mask) 87 #define OCFS2_CLEAR_INCOMPAT_FEATURE(sb,mask) \ 88 OCFS2_SB(sb)->s_feature_incompat &= ~(mask) 89 90 #define OCFS2_FEATURE_COMPAT_SUPP (OCFS2_FEATURE_COMPAT_BACKUP_SB \ 91 | OCFS2_FEATURE_COMPAT_JBD2_SB) 92 #define OCFS2_FEATURE_INCOMPAT_SUPP (OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT \ 93 | OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC \ 94 | OCFS2_FEATURE_INCOMPAT_INLINE_DATA \ 95 | OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP \ 96 | OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK \ 97 | OCFS2_FEATURE_INCOMPAT_XATTR \ 98 | OCFS2_FEATURE_INCOMPAT_META_ECC) 99 #define OCFS2_FEATURE_RO_COMPAT_SUPP (OCFS2_FEATURE_RO_COMPAT_UNWRITTEN \ 100 | OCFS2_FEATURE_RO_COMPAT_USRQUOTA \ 101 | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) 102 103 /* 104 * Heartbeat-only devices are missing journals and other files. The 105 * filesystem driver can't load them, but the library can. Never put 106 * this in OCFS2_FEATURE_INCOMPAT_SUPP, *ever*. 107 */ 108 #define OCFS2_FEATURE_INCOMPAT_HEARTBEAT_DEV 0x0002 109 110 /* 111 * tunefs sets this incompat flag before starting the resize and clears it 112 * at the end. This flag protects users from inadvertently mounting the fs 113 * after an aborted run without fsck-ing. 114 */ 115 #define OCFS2_FEATURE_INCOMPAT_RESIZE_INPROG 0x0004 116 117 /* Used to denote a non-clustered volume */ 118 #define OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT 0x0008 119 120 /* Support for sparse allocation in b-trees */ 121 #define OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC 0x0010 122 123 /* 124 * Tunefs sets this incompat flag before starting an operation which 125 * would require cleanup on abort. This is done to protect users from 126 * inadvertently mounting the fs after an aborted run without 127 * fsck-ing. 128 * 129 * s_tunefs_flags on the super block describes precisely which 130 * operations were in progress. 131 */ 132 #define OCFS2_FEATURE_INCOMPAT_TUNEFS_INPROG 0x0020 133 134 /* Support for data packed into inode blocks */ 135 #define OCFS2_FEATURE_INCOMPAT_INLINE_DATA 0x0040 136 137 /* 138 * Support for alternate, userspace cluster stacks. If set, the superblock 139 * field s_cluster_info contains a tag for the alternate stack in use as 140 * well as the name of the cluster being joined. 141 * mount.ocfs2 must pass in a matching stack name. 142 * 143 * If not set, the classic stack will be used. This is compatbile with 144 * all older versions. 145 */ 146 #define OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK 0x0080 147 148 /* Support for the extended slot map */ 149 #define OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP 0x100 150 151 /* Support for extended attributes */ 152 #define OCFS2_FEATURE_INCOMPAT_XATTR 0x0200 153 154 /* Metadata checksum and error correction */ 155 #define OCFS2_FEATURE_INCOMPAT_META_ECC 0x0800 156 157 /* 158 * backup superblock flag is used to indicate that this volume 159 * has backup superblocks. 160 */ 161 #define OCFS2_FEATURE_COMPAT_BACKUP_SB 0x0001 162 163 /* 164 * The filesystem will correctly handle journal feature bits. 165 */ 166 #define OCFS2_FEATURE_COMPAT_JBD2_SB 0x0002 167 168 /* 169 * Unwritten extents support. 170 */ 171 #define OCFS2_FEATURE_RO_COMPAT_UNWRITTEN 0x0001 172 173 /* 174 * Maintain quota information for this filesystem 175 */ 176 #define OCFS2_FEATURE_RO_COMPAT_USRQUOTA 0x0002 177 #define OCFS2_FEATURE_RO_COMPAT_GRPQUOTA 0x0004 178 179 /* The byte offset of the first backup block will be 1G. 180 * The following will be 4G, 16G, 64G, 256G and 1T. 181 */ 182 #define OCFS2_BACKUP_SB_START 1 << 30 183 184 /* the max backup superblock nums */ 185 #define OCFS2_MAX_BACKUP_SUPERBLOCKS 6 186 187 /* 188 * Flags on ocfs2_super_block.s_tunefs_flags 189 */ 190 #define OCFS2_TUNEFS_INPROG_REMOVE_SLOT 0x0001 /* Removing slots */ 191 192 /* 193 * Flags on ocfs2_dinode.i_flags 194 */ 195 #define OCFS2_VALID_FL (0x00000001) /* Inode is valid */ 196 #define OCFS2_UNUSED2_FL (0x00000002) 197 #define OCFS2_ORPHANED_FL (0x00000004) /* On the orphan list */ 198 #define OCFS2_UNUSED3_FL (0x00000008) 199 /* System inode flags */ 200 #define OCFS2_SYSTEM_FL (0x00000010) /* System inode */ 201 #define OCFS2_SUPER_BLOCK_FL (0x00000020) /* Super block */ 202 #define OCFS2_LOCAL_ALLOC_FL (0x00000040) /* Slot local alloc bitmap */ 203 #define OCFS2_BITMAP_FL (0x00000080) /* Allocation bitmap */ 204 #define OCFS2_JOURNAL_FL (0x00000100) /* Slot local journal */ 205 #define OCFS2_HEARTBEAT_FL (0x00000200) /* Heartbeat area */ 206 #define OCFS2_CHAIN_FL (0x00000400) /* Chain allocator */ 207 #define OCFS2_DEALLOC_FL (0x00000800) /* Truncate log */ 208 #define OCFS2_QUOTA_FL (0x00001000) /* Quota file */ 209 210 /* 211 * Flags on ocfs2_dinode.i_dyn_features 212 * 213 * These can change much more often than i_flags. When adding flags, 214 * keep in mind that i_dyn_features is only 16 bits wide. 215 */ 216 #define OCFS2_INLINE_DATA_FL (0x0001) /* Data stored in inode block */ 217 #define OCFS2_HAS_XATTR_FL (0x0002) 218 #define OCFS2_INLINE_XATTR_FL (0x0004) 219 #define OCFS2_INDEXED_DIR_FL (0x0008) 220 221 /* Inode attributes, keep in sync with EXT2 */ 222 #define OCFS2_SECRM_FL (0x00000001) /* Secure deletion */ 223 #define OCFS2_UNRM_FL (0x00000002) /* Undelete */ 224 #define OCFS2_COMPR_FL (0x00000004) /* Compress file */ 225 #define OCFS2_SYNC_FL (0x00000008) /* Synchronous updates */ 226 #define OCFS2_IMMUTABLE_FL (0x00000010) /* Immutable file */ 227 #define OCFS2_APPEND_FL (0x00000020) /* writes to file may only append */ 228 #define OCFS2_NODUMP_FL (0x00000040) /* do not dump file */ 229 #define OCFS2_NOATIME_FL (0x00000080) /* do not update atime */ 230 #define OCFS2_DIRSYNC_FL (0x00010000) /* dirsync behaviour (directories only) */ 231 232 #define OCFS2_FL_VISIBLE (0x000100FF) /* User visible flags */ 233 #define OCFS2_FL_MODIFIABLE (0x000100FF) /* User modifiable flags */ 234 235 /* 236 * Extent record flags (e_node.leaf.flags) 237 */ 238 #define OCFS2_EXT_UNWRITTEN (0x01) /* Extent is allocated but 239 * unwritten */ 240 241 /* 242 * ioctl commands 243 */ 244 #define OCFS2_IOC_GETFLAGS _IOR('f', 1, long) 245 #define OCFS2_IOC_SETFLAGS _IOW('f', 2, long) 246 #define OCFS2_IOC32_GETFLAGS _IOR('f', 1, int) 247 #define OCFS2_IOC32_SETFLAGS _IOW('f', 2, int) 248 249 /* 250 * Space reservation / allocation / free ioctls and argument structure 251 * are designed to be compatible with XFS. 252 * 253 * ALLOCSP* and FREESP* are not and will never be supported, but are 254 * included here for completeness. 255 */ 256 struct ocfs2_space_resv { 257 __s16 l_type; 258 __s16 l_whence; 259 __s64 l_start; 260 __s64 l_len; /* len == 0 means until end of file */ 261 __s32 l_sysid; 262 __u32 l_pid; 263 __s32 l_pad[4]; /* reserve area */ 264 }; 265 266 #define OCFS2_IOC_ALLOCSP _IOW ('X', 10, struct ocfs2_space_resv) 267 #define OCFS2_IOC_FREESP _IOW ('X', 11, struct ocfs2_space_resv) 268 #define OCFS2_IOC_RESVSP _IOW ('X', 40, struct ocfs2_space_resv) 269 #define OCFS2_IOC_UNRESVSP _IOW ('X', 41, struct ocfs2_space_resv) 270 #define OCFS2_IOC_ALLOCSP64 _IOW ('X', 36, struct ocfs2_space_resv) 271 #define OCFS2_IOC_FREESP64 _IOW ('X', 37, struct ocfs2_space_resv) 272 #define OCFS2_IOC_RESVSP64 _IOW ('X', 42, struct ocfs2_space_resv) 273 #define OCFS2_IOC_UNRESVSP64 _IOW ('X', 43, struct ocfs2_space_resv) 274 275 /* Used to pass group descriptor data when online resize is done */ 276 struct ocfs2_new_group_input { 277 __u64 group; /* Group descriptor's blkno. */ 278 __u32 clusters; /* Total number of clusters in this group */ 279 __u32 frees; /* Total free clusters in this group */ 280 __u16 chain; /* Chain for this group */ 281 __u16 reserved1; 282 __u32 reserved2; 283 }; 284 285 #define OCFS2_IOC_GROUP_EXTEND _IOW('o', 1, int) 286 #define OCFS2_IOC_GROUP_ADD _IOW('o', 2,struct ocfs2_new_group_input) 287 #define OCFS2_IOC_GROUP_ADD64 _IOW('o', 3,struct ocfs2_new_group_input) 288 289 /* 290 * Journal Flags (ocfs2_dinode.id1.journal1.i_flags) 291 */ 292 #define OCFS2_JOURNAL_DIRTY_FL (0x00000001) /* Journal needs recovery */ 293 294 /* 295 * superblock s_state flags 296 */ 297 #define OCFS2_ERROR_FS (0x00000001) /* FS saw errors */ 298 299 /* Limit of space in ocfs2_dir_entry */ 300 #define OCFS2_MAX_FILENAME_LEN 255 301 302 /* Maximum slots on an ocfs2 file system */ 303 #define OCFS2_MAX_SLOTS 255 304 305 /* Slot map indicator for an empty slot */ 306 #define OCFS2_INVALID_SLOT -1 307 308 #define OCFS2_VOL_UUID_LEN 16 309 #define OCFS2_MAX_VOL_LABEL_LEN 64 310 311 /* The alternate, userspace stack fields */ 312 #define OCFS2_STACK_LABEL_LEN 4 313 #define OCFS2_CLUSTER_NAME_LEN 16 314 315 /* Journal limits (in bytes) */ 316 #define OCFS2_MIN_JOURNAL_SIZE (4 * 1024 * 1024) 317 318 /* 319 * Default local alloc size (in megabytes) 320 * 321 * The value chosen should be such that most allocations, including new 322 * block groups, use local alloc. 323 */ 324 #define OCFS2_DEFAULT_LOCAL_ALLOC_SIZE 8 325 326 /* 327 * Inline extended attribute size (in bytes) 328 * The value chosen should be aligned to 16 byte boundaries. 329 */ 330 #define OCFS2_MIN_XATTR_INLINE_SIZE 256 331 332 struct ocfs2_system_inode_info { 333 char *si_name; 334 int si_iflags; 335 int si_mode; 336 }; 337 338 /* System file index */ 339 enum { 340 BAD_BLOCK_SYSTEM_INODE = 0, 341 GLOBAL_INODE_ALLOC_SYSTEM_INODE, 342 SLOT_MAP_SYSTEM_INODE, 343 #define OCFS2_FIRST_ONLINE_SYSTEM_INODE SLOT_MAP_SYSTEM_INODE 344 HEARTBEAT_SYSTEM_INODE, 345 GLOBAL_BITMAP_SYSTEM_INODE, 346 USER_QUOTA_SYSTEM_INODE, 347 GROUP_QUOTA_SYSTEM_INODE, 348 #define OCFS2_LAST_GLOBAL_SYSTEM_INODE GROUP_QUOTA_SYSTEM_INODE 349 ORPHAN_DIR_SYSTEM_INODE, 350 EXTENT_ALLOC_SYSTEM_INODE, 351 INODE_ALLOC_SYSTEM_INODE, 352 JOURNAL_SYSTEM_INODE, 353 LOCAL_ALLOC_SYSTEM_INODE, 354 TRUNCATE_LOG_SYSTEM_INODE, 355 LOCAL_USER_QUOTA_SYSTEM_INODE, 356 LOCAL_GROUP_QUOTA_SYSTEM_INODE, 357 NUM_SYSTEM_INODES 358 }; 359 360 static struct ocfs2_system_inode_info ocfs2_system_inodes[NUM_SYSTEM_INODES] = { 361 /* Global system inodes (single copy) */ 362 /* The first two are only used from userspace mfks/tunefs */ 363 [BAD_BLOCK_SYSTEM_INODE] = { "bad_blocks", 0, S_IFREG | 0644 }, 364 [GLOBAL_INODE_ALLOC_SYSTEM_INODE] = { "global_inode_alloc", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 }, 365 366 /* These are used by the running filesystem */ 367 [SLOT_MAP_SYSTEM_INODE] = { "slot_map", 0, S_IFREG | 0644 }, 368 [HEARTBEAT_SYSTEM_INODE] = { "heartbeat", OCFS2_HEARTBEAT_FL, S_IFREG | 0644 }, 369 [GLOBAL_BITMAP_SYSTEM_INODE] = { "global_bitmap", 0, S_IFREG | 0644 }, 370 [USER_QUOTA_SYSTEM_INODE] = { "aquota.user", OCFS2_QUOTA_FL, S_IFREG | 0644 }, 371 [GROUP_QUOTA_SYSTEM_INODE] = { "aquota.group", OCFS2_QUOTA_FL, S_IFREG | 0644 }, 372 373 /* Slot-specific system inodes (one copy per slot) */ 374 [ORPHAN_DIR_SYSTEM_INODE] = { "orphan_dir:%04d", 0, S_IFDIR | 0755 }, 375 [EXTENT_ALLOC_SYSTEM_INODE] = { "extent_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 }, 376 [INODE_ALLOC_SYSTEM_INODE] = { "inode_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 }, 377 [JOURNAL_SYSTEM_INODE] = { "journal:%04d", OCFS2_JOURNAL_FL, S_IFREG | 0644 }, 378 [LOCAL_ALLOC_SYSTEM_INODE] = { "local_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_LOCAL_ALLOC_FL, S_IFREG | 0644 }, 379 [TRUNCATE_LOG_SYSTEM_INODE] = { "truncate_log:%04d", OCFS2_DEALLOC_FL, S_IFREG | 0644 }, 380 [LOCAL_USER_QUOTA_SYSTEM_INODE] = { "aquota.user:%04d", OCFS2_QUOTA_FL, S_IFREG | 0644 }, 381 [LOCAL_GROUP_QUOTA_SYSTEM_INODE] = { "aquota.group:%04d", OCFS2_QUOTA_FL, S_IFREG | 0644 }, 382 }; 383 384 /* Parameter passed from mount.ocfs2 to module */ 385 #define OCFS2_HB_NONE "heartbeat=none" 386 #define OCFS2_HB_LOCAL "heartbeat=local" 387 388 /* 389 * OCFS2 directory file types. Only the low 3 bits are used. The 390 * other bits are reserved for now. 391 */ 392 #define OCFS2_FT_UNKNOWN 0 393 #define OCFS2_FT_REG_FILE 1 394 #define OCFS2_FT_DIR 2 395 #define OCFS2_FT_CHRDEV 3 396 #define OCFS2_FT_BLKDEV 4 397 #define OCFS2_FT_FIFO 5 398 #define OCFS2_FT_SOCK 6 399 #define OCFS2_FT_SYMLINK 7 400 401 #define OCFS2_FT_MAX 8 402 403 /* 404 * OCFS2_DIR_PAD defines the directory entries boundaries 405 * 406 * NOTE: It must be a multiple of 4 407 */ 408 #define OCFS2_DIR_PAD 4 409 #define OCFS2_DIR_ROUND (OCFS2_DIR_PAD - 1) 410 #define OCFS2_DIR_MEMBER_LEN offsetof(struct ocfs2_dir_entry, name) 411 #define OCFS2_DIR_REC_LEN(name_len) (((name_len) + OCFS2_DIR_MEMBER_LEN + \ 412 OCFS2_DIR_ROUND) & \ 413 ~OCFS2_DIR_ROUND) 414 415 #define OCFS2_LINK_MAX 32000 416 417 #define S_SHIFT 12 418 static unsigned char ocfs2_type_by_mode[S_IFMT >> S_SHIFT] = { 419 [S_IFREG >> S_SHIFT] = OCFS2_FT_REG_FILE, 420 [S_IFDIR >> S_SHIFT] = OCFS2_FT_DIR, 421 [S_IFCHR >> S_SHIFT] = OCFS2_FT_CHRDEV, 422 [S_IFBLK >> S_SHIFT] = OCFS2_FT_BLKDEV, 423 [S_IFIFO >> S_SHIFT] = OCFS2_FT_FIFO, 424 [S_IFSOCK >> S_SHIFT] = OCFS2_FT_SOCK, 425 [S_IFLNK >> S_SHIFT] = OCFS2_FT_SYMLINK, 426 }; 427 428 429 /* 430 * Convenience casts 431 */ 432 #define OCFS2_RAW_SB(dinode) (&((dinode)->id2.i_super)) 433 434 /* 435 * Block checking structure. This is used in metadata to validate the 436 * contents. If OCFS2_FEATURE_INCOMPAT_META_ECC is not set, it is all 437 * zeros. 438 */ 439 struct ocfs2_block_check { 440 /*00*/ __le32 bc_crc32e; /* 802.3 Ethernet II CRC32 */ 441 __le16 bc_ecc; /* Single-error-correction parity vector. 442 This is a simple Hamming code dependant 443 on the blocksize. OCFS2's maximum 444 blocksize, 4K, requires 16 parity bits, 445 so we fit in __le16. */ 446 __le16 bc_reserved1; 447 /*08*/ 448 }; 449 450 /* 451 * On disk extent record for OCFS2 452 * It describes a range of clusters on disk. 453 * 454 * Length fields are divided into interior and leaf node versions. 455 * This leaves room for a flags field (OCFS2_EXT_*) in the leaf nodes. 456 */ 457 struct ocfs2_extent_rec { 458 /*00*/ __le32 e_cpos; /* Offset into the file, in clusters */ 459 union { 460 __le32 e_int_clusters; /* Clusters covered by all children */ 461 struct { 462 __le16 e_leaf_clusters; /* Clusters covered by this 463 extent */ 464 __u8 e_reserved1; 465 __u8 e_flags; /* Extent flags */ 466 }; 467 }; 468 __le64 e_blkno; /* Physical disk offset, in blocks */ 469 /*10*/ 470 }; 471 472 struct ocfs2_chain_rec { 473 __le32 c_free; /* Number of free bits in this chain. */ 474 __le32 c_total; /* Number of total bits in this chain */ 475 __le64 c_blkno; /* Physical disk offset (blocks) of 1st group */ 476 }; 477 478 struct ocfs2_truncate_rec { 479 __le32 t_start; /* 1st cluster in this log */ 480 __le32 t_clusters; /* Number of total clusters covered */ 481 }; 482 483 /* 484 * On disk extent list for OCFS2 (node in the tree). Note that this 485 * is contained inside ocfs2_dinode or ocfs2_extent_block, so the 486 * offsets are relative to ocfs2_dinode.id2.i_list or 487 * ocfs2_extent_block.h_list, respectively. 488 */ 489 struct ocfs2_extent_list { 490 /*00*/ __le16 l_tree_depth; /* Extent tree depth from this 491 point. 0 means data extents 492 hang directly off this 493 header (a leaf) 494 NOTE: The high 8 bits cannot be 495 used - tree_depth is never that big. 496 */ 497 __le16 l_count; /* Number of extent records */ 498 __le16 l_next_free_rec; /* Next unused extent slot */ 499 __le16 l_reserved1; 500 __le64 l_reserved2; /* Pad to 501 sizeof(ocfs2_extent_rec) */ 502 /*10*/ struct ocfs2_extent_rec l_recs[0]; /* Extent records */ 503 }; 504 505 /* 506 * On disk allocation chain list for OCFS2. Note that this is 507 * contained inside ocfs2_dinode, so the offsets are relative to 508 * ocfs2_dinode.id2.i_chain. 509 */ 510 struct ocfs2_chain_list { 511 /*00*/ __le16 cl_cpg; /* Clusters per Block Group */ 512 __le16 cl_bpc; /* Bits per cluster */ 513 __le16 cl_count; /* Total chains in this list */ 514 __le16 cl_next_free_rec; /* Next unused chain slot */ 515 __le64 cl_reserved1; 516 /*10*/ struct ocfs2_chain_rec cl_recs[0]; /* Chain records */ 517 }; 518 519 /* 520 * On disk deallocation log for OCFS2. Note that this is 521 * contained inside ocfs2_dinode, so the offsets are relative to 522 * ocfs2_dinode.id2.i_dealloc. 523 */ 524 struct ocfs2_truncate_log { 525 /*00*/ __le16 tl_count; /* Total records in this log */ 526 __le16 tl_used; /* Number of records in use */ 527 __le32 tl_reserved1; 528 /*08*/ struct ocfs2_truncate_rec tl_recs[0]; /* Truncate records */ 529 }; 530 531 /* 532 * On disk extent block (indirect block) for OCFS2 533 */ 534 struct ocfs2_extent_block 535 { 536 /*00*/ __u8 h_signature[8]; /* Signature for verification */ 537 struct ocfs2_block_check h_check; /* Error checking */ 538 /*10*/ __le16 h_suballoc_slot; /* Slot suballocator this 539 extent_header belongs to */ 540 __le16 h_suballoc_bit; /* Bit offset in suballocator 541 block group */ 542 __le32 h_fs_generation; /* Must match super block */ 543 __le64 h_blkno; /* Offset on disk, in blocks */ 544 /*20*/ __le64 h_reserved3; 545 __le64 h_next_leaf_blk; /* Offset on disk, in blocks, 546 of next leaf header pointing 547 to data */ 548 /*30*/ struct ocfs2_extent_list h_list; /* Extent record list */ 549 /* Actual on-disk size is one block */ 550 }; 551 552 /* 553 * On disk slot map for OCFS2. This defines the contents of the "slot_map" 554 * system file. A slot is valid if it contains a node number >= 0. The 555 * value -1 (0xFFFF) is OCFS2_INVALID_SLOT. This marks a slot empty. 556 */ 557 struct ocfs2_slot_map { 558 /*00*/ __le16 sm_slots[0]; 559 /* 560 * Actual on-disk size is one block. OCFS2_MAX_SLOTS is 255, 561 * 255 * sizeof(__le16) == 512B, within the 512B block minimum blocksize. 562 */ 563 }; 564 565 struct ocfs2_extended_slot { 566 /*00*/ __u8 es_valid; 567 __u8 es_reserved1[3]; 568 __le32 es_node_num; 569 /*10*/ 570 }; 571 572 /* 573 * The extended slot map, used when OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP 574 * is set. It separates out the valid marker from the node number, and 575 * has room to grow. Unlike the old slot map, this format is defined by 576 * i_size. 577 */ 578 struct ocfs2_slot_map_extended { 579 /*00*/ struct ocfs2_extended_slot se_slots[0]; 580 /* 581 * Actual size is i_size of the slot_map system file. It should 582 * match s_max_slots * sizeof(struct ocfs2_extended_slot) 583 */ 584 }; 585 586 struct ocfs2_cluster_info { 587 /*00*/ __u8 ci_stack[OCFS2_STACK_LABEL_LEN]; 588 __le32 ci_reserved; 589 /*08*/ __u8 ci_cluster[OCFS2_CLUSTER_NAME_LEN]; 590 /*18*/ 591 }; 592 593 /* 594 * On disk superblock for OCFS2 595 * Note that it is contained inside an ocfs2_dinode, so all offsets 596 * are relative to the start of ocfs2_dinode.id2. 597 */ 598 struct ocfs2_super_block { 599 /*00*/ __le16 s_major_rev_level; 600 __le16 s_minor_rev_level; 601 __le16 s_mnt_count; 602 __le16 s_max_mnt_count; 603 __le16 s_state; /* File system state */ 604 __le16 s_errors; /* Behaviour when detecting errors */ 605 __le32 s_checkinterval; /* Max time between checks */ 606 /*10*/ __le64 s_lastcheck; /* Time of last check */ 607 __le32 s_creator_os; /* OS */ 608 __le32 s_feature_compat; /* Compatible feature set */ 609 /*20*/ __le32 s_feature_incompat; /* Incompatible feature set */ 610 __le32 s_feature_ro_compat; /* Readonly-compatible feature set */ 611 __le64 s_root_blkno; /* Offset, in blocks, of root directory 612 dinode */ 613 /*30*/ __le64 s_system_dir_blkno; /* Offset, in blocks, of system 614 directory dinode */ 615 __le32 s_blocksize_bits; /* Blocksize for this fs */ 616 __le32 s_clustersize_bits; /* Clustersize for this fs */ 617 /*40*/ __le16 s_max_slots; /* Max number of simultaneous mounts 618 before tunefs required */ 619 __le16 s_tunefs_flag; 620 __le32 s_uuid_hash; /* hash value of uuid */ 621 __le64 s_first_cluster_group; /* Block offset of 1st cluster 622 * group header */ 623 /*50*/ __u8 s_label[OCFS2_MAX_VOL_LABEL_LEN]; /* Label for mounting, etc. */ 624 /*90*/ __u8 s_uuid[OCFS2_VOL_UUID_LEN]; /* 128-bit uuid */ 625 /*A0*/ struct ocfs2_cluster_info s_cluster_info; /* Selected userspace 626 stack. Only valid 627 with INCOMPAT flag. */ 628 /*B8*/ __le16 s_xattr_inline_size; /* extended attribute inline size 629 for this fs*/ 630 __le16 s_reserved0; 631 __le32 s_reserved1; 632 /*C0*/ __le64 s_reserved2[16]; /* Fill out superblock */ 633 /*140*/ 634 635 /* 636 * NOTE: As stated above, all offsets are relative to 637 * ocfs2_dinode.id2, which is at 0xC0 in the inode. 638 * 0xC0 + 0x140 = 0x200 or 512 bytes. A superblock must fit within 639 * our smallest blocksize, which is 512 bytes. To ensure this, 640 * we reserve the space in s_reserved2. Anything past s_reserved2 641 * will not be available on the smallest blocksize. 642 */ 643 }; 644 645 /* 646 * Local allocation bitmap for OCFS2 slots 647 * Note that it exists inside an ocfs2_dinode, so all offsets are 648 * relative to the start of ocfs2_dinode.id2. 649 */ 650 struct ocfs2_local_alloc 651 { 652 /*00*/ __le32 la_bm_off; /* Starting bit offset in main bitmap */ 653 __le16 la_size; /* Size of included bitmap, in bytes */ 654 __le16 la_reserved1; 655 __le64 la_reserved2; 656 /*10*/ __u8 la_bitmap[0]; 657 }; 658 659 /* 660 * Data-in-inode header. This is only used if i_dyn_features has 661 * OCFS2_INLINE_DATA_FL set. 662 */ 663 struct ocfs2_inline_data 664 { 665 /*00*/ __le16 id_count; /* Number of bytes that can be used 666 * for data, starting at id_data */ 667 __le16 id_reserved0; 668 __le32 id_reserved1; 669 __u8 id_data[0]; /* Start of user data */ 670 }; 671 672 /* 673 * On disk inode for OCFS2 674 */ 675 struct ocfs2_dinode { 676 /*00*/ __u8 i_signature[8]; /* Signature for validation */ 677 __le32 i_generation; /* Generation number */ 678 __le16 i_suballoc_slot; /* Slot suballocator this inode 679 belongs to */ 680 __le16 i_suballoc_bit; /* Bit offset in suballocator 681 block group */ 682 /*10*/ __le16 i_reserved0; 683 __le16 i_xattr_inline_size; 684 __le32 i_clusters; /* Cluster count */ 685 __le32 i_uid; /* Owner UID */ 686 __le32 i_gid; /* Owning GID */ 687 /*20*/ __le64 i_size; /* Size in bytes */ 688 __le16 i_mode; /* File mode */ 689 __le16 i_links_count; /* Links count */ 690 __le32 i_flags; /* File flags */ 691 /*30*/ __le64 i_atime; /* Access time */ 692 __le64 i_ctime; /* Creation time */ 693 /*40*/ __le64 i_mtime; /* Modification time */ 694 __le64 i_dtime; /* Deletion time */ 695 /*50*/ __le64 i_blkno; /* Offset on disk, in blocks */ 696 __le64 i_last_eb_blk; /* Pointer to last extent 697 block */ 698 /*60*/ __le32 i_fs_generation; /* Generation per fs-instance */ 699 __le32 i_atime_nsec; 700 __le32 i_ctime_nsec; 701 __le32 i_mtime_nsec; 702 /*70*/ __le32 i_attr; 703 __le16 i_orphaned_slot; /* Only valid when OCFS2_ORPHANED_FL 704 was set in i_flags */ 705 __le16 i_dyn_features; 706 __le64 i_xattr_loc; 707 /*80*/ struct ocfs2_block_check i_check; /* Error checking */ 708 /*88*/ __le64 i_reserved2[6]; 709 /*B8*/ union { 710 __le64 i_pad1; /* Generic way to refer to this 711 64bit union */ 712 struct { 713 __le64 i_rdev; /* Device number */ 714 } dev1; 715 struct { /* Info for bitmap system 716 inodes */ 717 __le32 i_used; /* Bits (ie, clusters) used */ 718 __le32 i_total; /* Total bits (clusters) 719 available */ 720 } bitmap1; 721 struct { /* Info for journal system 722 inodes */ 723 __le32 ij_flags; /* Mounted, version, etc. */ 724 __le32 ij_recovery_generation; /* Incremented when the 725 journal is recovered 726 after an unclean 727 shutdown */ 728 } journal1; 729 } id1; /* Inode type dependant 1 */ 730 /*C0*/ union { 731 struct ocfs2_super_block i_super; 732 struct ocfs2_local_alloc i_lab; 733 struct ocfs2_chain_list i_chain; 734 struct ocfs2_extent_list i_list; 735 struct ocfs2_truncate_log i_dealloc; 736 struct ocfs2_inline_data i_data; 737 __u8 i_symlink[0]; 738 } id2; 739 /* Actual on-disk size is one block */ 740 }; 741 742 /* 743 * On-disk directory entry structure for OCFS2 744 * 745 * Packed as this structure could be accessed unaligned on 64-bit platforms 746 */ 747 struct ocfs2_dir_entry { 748 /*00*/ __le64 inode; /* Inode number */ 749 __le16 rec_len; /* Directory entry length */ 750 __u8 name_len; /* Name length */ 751 __u8 file_type; 752 /*0C*/ char name[OCFS2_MAX_FILENAME_LEN]; /* File name */ 753 /* Actual on-disk length specified by rec_len */ 754 } __attribute__ ((packed)); 755 756 /* 757 * Per-block record for the unindexed directory btree. This is carefully 758 * crafted so that the rec_len and name_len records of an ocfs2_dir_entry are 759 * mirrored. That way, the directory manipulation code needs a minimal amount 760 * of update. 761 * 762 * NOTE: Keep this structure aligned to a multiple of 4 bytes. 763 */ 764 struct ocfs2_dir_block_trailer { 765 /*00*/ __le64 db_compat_inode; /* Always zero. Was inode */ 766 767 __le16 db_compat_rec_len; /* Backwards compatible with 768 * ocfs2_dir_entry. */ 769 __u8 db_compat_name_len; /* Always zero. Was name_len */ 770 __u8 db_reserved0; 771 __le16 db_reserved1; 772 __le16 db_free_rec_len; /* Size of largest empty hole 773 * in this block. (unused) */ 774 /*10*/ __u8 db_signature[8]; /* Signature for verification */ 775 __le64 db_reserved2; 776 __le64 db_free_next; /* Next block in list (unused) */ 777 /*20*/ __le64 db_blkno; /* Offset on disk, in blocks */ 778 __le64 db_parent_dinode; /* dinode which owns me, in 779 blocks */ 780 /*30*/ struct ocfs2_block_check db_check; /* Error checking */ 781 /*40*/ 782 }; 783 784 /* 785 * On disk allocator group structure for OCFS2 786 */ 787 struct ocfs2_group_desc 788 { 789 /*00*/ __u8 bg_signature[8]; /* Signature for validation */ 790 __le16 bg_size; /* Size of included bitmap in 791 bytes. */ 792 __le16 bg_bits; /* Bits represented by this 793 group. */ 794 __le16 bg_free_bits_count; /* Free bits count */ 795 __le16 bg_chain; /* What chain I am in. */ 796 /*10*/ __le32 bg_generation; 797 __le32 bg_reserved1; 798 __le64 bg_next_group; /* Next group in my list, in 799 blocks */ 800 /*20*/ __le64 bg_parent_dinode; /* dinode which owns me, in 801 blocks */ 802 __le64 bg_blkno; /* Offset on disk, in blocks */ 803 /*30*/ struct ocfs2_block_check bg_check; /* Error checking */ 804 __le64 bg_reserved2; 805 /*40*/ __u8 bg_bitmap[0]; 806 }; 807 808 /* 809 * On disk extended attribute structure for OCFS2. 810 */ 811 812 /* 813 * ocfs2_xattr_entry indicates one extend attribute. 814 * 815 * Note that it can be stored in inode, one block or one xattr bucket. 816 */ 817 struct ocfs2_xattr_entry { 818 __le32 xe_name_hash; /* hash value of xattr prefix+suffix. */ 819 __le16 xe_name_offset; /* byte offset from the 1st entry in the 820 local xattr storage(inode, xattr block or 821 xattr bucket). */ 822 __u8 xe_name_len; /* xattr name len, does't include prefix. */ 823 __u8 xe_type; /* the low 7 bits indicate the name prefix 824 * type and the highest bit indicates whether 825 * the EA is stored in the local storage. */ 826 __le64 xe_value_size; /* real xattr value length. */ 827 }; 828 829 /* 830 * On disk structure for xattr header. 831 * 832 * One ocfs2_xattr_header describes how many ocfs2_xattr_entry records in 833 * the local xattr storage. 834 */ 835 struct ocfs2_xattr_header { 836 __le16 xh_count; /* contains the count of how 837 many records are in the 838 local xattr storage. */ 839 __le16 xh_free_start; /* current offset for storing 840 xattr. */ 841 __le16 xh_name_value_len; /* total length of name/value 842 length in this bucket. */ 843 __le16 xh_num_buckets; /* Number of xattr buckets 844 in this extent record, 845 only valid in the first 846 bucket. */ 847 struct ocfs2_block_check xh_check; /* Error checking 848 (Note, this is only 849 used for xattr 850 buckets. A block uses 851 xb_check and sets 852 this field to zero.) */ 853 struct ocfs2_xattr_entry xh_entries[0]; /* xattr entry list. */ 854 }; 855 856 /* 857 * On disk structure for xattr value root. 858 * 859 * When an xattr's value is large enough, it is stored in an external 860 * b-tree like file data. The xattr value root points to this structure. 861 */ 862 struct ocfs2_xattr_value_root { 863 /*00*/ __le32 xr_clusters; /* clusters covered by xattr value. */ 864 __le32 xr_reserved0; 865 __le64 xr_last_eb_blk; /* Pointer to last extent block */ 866 /*10*/ struct ocfs2_extent_list xr_list; /* Extent record list */ 867 }; 868 869 /* 870 * On disk structure for xattr tree root. 871 * 872 * It is used when there are too many extended attributes for one file. These 873 * attributes will be organized and stored in an indexed-btree. 874 */ 875 struct ocfs2_xattr_tree_root { 876 /*00*/ __le32 xt_clusters; /* clusters covered by xattr. */ 877 __le32 xt_reserved0; 878 __le64 xt_last_eb_blk; /* Pointer to last extent block */ 879 /*10*/ struct ocfs2_extent_list xt_list; /* Extent record list */ 880 }; 881 882 #define OCFS2_XATTR_INDEXED 0x1 883 #define OCFS2_HASH_SHIFT 5 884 #define OCFS2_XATTR_ROUND 3 885 #define OCFS2_XATTR_SIZE(size) (((size) + OCFS2_XATTR_ROUND) & \ 886 ~(OCFS2_XATTR_ROUND)) 887 888 #define OCFS2_XATTR_BUCKET_SIZE 4096 889 #define OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET (OCFS2_XATTR_BUCKET_SIZE \ 890 / OCFS2_MIN_BLOCKSIZE) 891 892 /* 893 * On disk structure for xattr block. 894 */ 895 struct ocfs2_xattr_block { 896 /*00*/ __u8 xb_signature[8]; /* Signature for verification */ 897 __le16 xb_suballoc_slot; /* Slot suballocator this 898 block belongs to. */ 899 __le16 xb_suballoc_bit; /* Bit offset in suballocator 900 block group */ 901 __le32 xb_fs_generation; /* Must match super block */ 902 /*10*/ __le64 xb_blkno; /* Offset on disk, in blocks */ 903 struct ocfs2_block_check xb_check; /* Error checking */ 904 /*20*/ __le16 xb_flags; /* Indicates whether this block contains 905 real xattr or a xattr tree. */ 906 __le16 xb_reserved0; 907 __le32 xb_reserved1; 908 __le64 xb_reserved2; 909 /*30*/ union { 910 struct ocfs2_xattr_header xb_header; /* xattr header if this 911 block contains xattr */ 912 struct ocfs2_xattr_tree_root xb_root;/* xattr tree root if this 913 block cotains xattr 914 tree. */ 915 } xb_attrs; 916 }; 917 918 #define OCFS2_XATTR_ENTRY_LOCAL 0x80 919 #define OCFS2_XATTR_TYPE_MASK 0x7F 920 static inline void ocfs2_xattr_set_local(struct ocfs2_xattr_entry *xe, 921 int local) 922 { 923 if (local) 924 xe->xe_type |= OCFS2_XATTR_ENTRY_LOCAL; 925 else 926 xe->xe_type &= ~OCFS2_XATTR_ENTRY_LOCAL; 927 } 928 929 static inline int ocfs2_xattr_is_local(struct ocfs2_xattr_entry *xe) 930 { 931 return xe->xe_type & OCFS2_XATTR_ENTRY_LOCAL; 932 } 933 934 static inline void ocfs2_xattr_set_type(struct ocfs2_xattr_entry *xe, int type) 935 { 936 xe->xe_type |= type & OCFS2_XATTR_TYPE_MASK; 937 } 938 939 static inline int ocfs2_xattr_get_type(struct ocfs2_xattr_entry *xe) 940 { 941 return xe->xe_type & OCFS2_XATTR_TYPE_MASK; 942 } 943 944 /* 945 * On disk structures for global quota file 946 */ 947 948 /* Magic numbers and known versions for global quota files */ 949 #define OCFS2_GLOBAL_QMAGICS {\ 950 0x0cf52470, /* USRQUOTA */ \ 951 0x0cf52471 /* GRPQUOTA */ \ 952 } 953 954 #define OCFS2_GLOBAL_QVERSIONS {\ 955 0, \ 956 0, \ 957 } 958 959 960 /* Each block of each quota file has a certain fixed number of bytes reserved 961 * for OCFS2 internal use at its end. OCFS2 can use it for things like 962 * checksums, etc. */ 963 #define OCFS2_QBLK_RESERVED_SPACE 8 964 965 /* Generic header of all quota files */ 966 struct ocfs2_disk_dqheader { 967 __le32 dqh_magic; /* Magic number identifying file */ 968 __le32 dqh_version; /* Quota format version */ 969 }; 970 971 #define OCFS2_GLOBAL_INFO_OFF (sizeof(struct ocfs2_disk_dqheader)) 972 973 /* Information header of global quota file (immediately follows the generic 974 * header) */ 975 struct ocfs2_global_disk_dqinfo { 976 /*00*/ __le32 dqi_bgrace; /* Grace time for space softlimit excess */ 977 __le32 dqi_igrace; /* Grace time for inode softlimit excess */ 978 __le32 dqi_syncms; /* Time after which we sync local changes to 979 * global quota file */ 980 __le32 dqi_blocks; /* Number of blocks in quota file */ 981 /*10*/ __le32 dqi_free_blk; /* First free block in quota file */ 982 __le32 dqi_free_entry; /* First block with free dquot entry in quota 983 * file */ 984 }; 985 986 /* Structure with global user / group information. We reserve some space 987 * for future use. */ 988 struct ocfs2_global_disk_dqblk { 989 /*00*/ __le32 dqb_id; /* ID the structure belongs to */ 990 __le32 dqb_use_count; /* Number of nodes having reference to this structure */ 991 __le64 dqb_ihardlimit; /* absolute limit on allocated inodes */ 992 /*10*/ __le64 dqb_isoftlimit; /* preferred inode limit */ 993 __le64 dqb_curinodes; /* current # allocated inodes */ 994 /*20*/ __le64 dqb_bhardlimit; /* absolute limit on disk space */ 995 __le64 dqb_bsoftlimit; /* preferred limit on disk space */ 996 /*30*/ __le64 dqb_curspace; /* current space occupied */ 997 __le64 dqb_btime; /* time limit for excessive disk use */ 998 /*40*/ __le64 dqb_itime; /* time limit for excessive inode use */ 999 __le64 dqb_pad1; 1000 /*50*/ __le64 dqb_pad2; 1001 }; 1002 1003 /* 1004 * On-disk structures for local quota file 1005 */ 1006 1007 /* Magic numbers and known versions for local quota files */ 1008 #define OCFS2_LOCAL_QMAGICS {\ 1009 0x0cf524c0, /* USRQUOTA */ \ 1010 0x0cf524c1 /* GRPQUOTA */ \ 1011 } 1012 1013 #define OCFS2_LOCAL_QVERSIONS {\ 1014 0, \ 1015 0, \ 1016 } 1017 1018 /* Quota flags in dqinfo header */ 1019 #define OLQF_CLEAN 0x0001 /* Quota file is empty (this should be after\ 1020 * quota has been cleanly turned off) */ 1021 1022 #define OCFS2_LOCAL_INFO_OFF (sizeof(struct ocfs2_disk_dqheader)) 1023 1024 /* Information header of local quota file (immediately follows the generic 1025 * header) */ 1026 struct ocfs2_local_disk_dqinfo { 1027 __le32 dqi_flags; /* Flags for quota file */ 1028 __le32 dqi_chunks; /* Number of chunks of quota structures 1029 * with a bitmap */ 1030 __le32 dqi_blocks; /* Number of blocks allocated for quota file */ 1031 }; 1032 1033 /* Header of one chunk of a quota file */ 1034 struct ocfs2_local_disk_chunk { 1035 __le32 dqc_free; /* Number of free entries in the bitmap */ 1036 u8 dqc_bitmap[0]; /* Bitmap of entries in the corresponding 1037 * chunk of quota file */ 1038 }; 1039 1040 /* One entry in local quota file */ 1041 struct ocfs2_local_disk_dqblk { 1042 /*00*/ __le64 dqb_id; /* id this quota applies to */ 1043 __le64 dqb_spacemod; /* Change in the amount of used space */ 1044 /*10*/ __le64 dqb_inodemod; /* Change in the amount of used inodes */ 1045 }; 1046 1047 1048 /* 1049 * The quota trailer lives at the end of each quota block. 1050 */ 1051 1052 struct ocfs2_disk_dqtrailer { 1053 /*00*/ struct ocfs2_block_check dq_check; /* Error checking */ 1054 /*08*/ /* Cannot be larger than OCFS2_QBLK_RESERVED_SPACE */ 1055 }; 1056 1057 static inline struct ocfs2_disk_dqtrailer *ocfs2_block_dqtrailer(int blocksize, 1058 void *buf) 1059 { 1060 char *ptr = buf; 1061 ptr += blocksize - OCFS2_QBLK_RESERVED_SPACE; 1062 1063 return (struct ocfs2_disk_dqtrailer *)ptr; 1064 } 1065 1066 #ifdef __KERNEL__ 1067 static inline int ocfs2_fast_symlink_chars(struct super_block *sb) 1068 { 1069 return sb->s_blocksize - 1070 offsetof(struct ocfs2_dinode, id2.i_symlink); 1071 } 1072 1073 static inline int ocfs2_max_inline_data_with_xattr(struct super_block *sb, 1074 struct ocfs2_dinode *di) 1075 { 1076 unsigned int xattrsize = le16_to_cpu(di->i_xattr_inline_size); 1077 1078 if (le16_to_cpu(di->i_dyn_features) & OCFS2_INLINE_XATTR_FL) 1079 return sb->s_blocksize - 1080 offsetof(struct ocfs2_dinode, id2.i_data.id_data) - 1081 xattrsize; 1082 else 1083 return sb->s_blocksize - 1084 offsetof(struct ocfs2_dinode, id2.i_data.id_data); 1085 } 1086 1087 static inline int ocfs2_extent_recs_per_inode(struct super_block *sb) 1088 { 1089 int size; 1090 1091 size = sb->s_blocksize - 1092 offsetof(struct ocfs2_dinode, id2.i_list.l_recs); 1093 1094 return size / sizeof(struct ocfs2_extent_rec); 1095 } 1096 1097 static inline int ocfs2_extent_recs_per_inode_with_xattr( 1098 struct super_block *sb, 1099 struct ocfs2_dinode *di) 1100 { 1101 int size; 1102 unsigned int xattrsize = le16_to_cpu(di->i_xattr_inline_size); 1103 1104 if (le16_to_cpu(di->i_dyn_features) & OCFS2_INLINE_XATTR_FL) 1105 size = sb->s_blocksize - 1106 offsetof(struct ocfs2_dinode, id2.i_list.l_recs) - 1107 xattrsize; 1108 else 1109 size = sb->s_blocksize - 1110 offsetof(struct ocfs2_dinode, id2.i_list.l_recs); 1111 1112 return size / sizeof(struct ocfs2_extent_rec); 1113 } 1114 1115 static inline int ocfs2_chain_recs_per_inode(struct super_block *sb) 1116 { 1117 int size; 1118 1119 size = sb->s_blocksize - 1120 offsetof(struct ocfs2_dinode, id2.i_chain.cl_recs); 1121 1122 return size / sizeof(struct ocfs2_chain_rec); 1123 } 1124 1125 static inline u16 ocfs2_extent_recs_per_eb(struct super_block *sb) 1126 { 1127 int size; 1128 1129 size = sb->s_blocksize - 1130 offsetof(struct ocfs2_extent_block, h_list.l_recs); 1131 1132 return size / sizeof(struct ocfs2_extent_rec); 1133 } 1134 1135 static inline u16 ocfs2_local_alloc_size(struct super_block *sb) 1136 { 1137 u16 size; 1138 1139 size = sb->s_blocksize - 1140 offsetof(struct ocfs2_dinode, id2.i_lab.la_bitmap); 1141 1142 return size; 1143 } 1144 1145 static inline int ocfs2_group_bitmap_size(struct super_block *sb) 1146 { 1147 int size; 1148 1149 size = sb->s_blocksize - 1150 offsetof(struct ocfs2_group_desc, bg_bitmap); 1151 1152 return size; 1153 } 1154 1155 static inline int ocfs2_truncate_recs_per_inode(struct super_block *sb) 1156 { 1157 int size; 1158 1159 size = sb->s_blocksize - 1160 offsetof(struct ocfs2_dinode, id2.i_dealloc.tl_recs); 1161 1162 return size / sizeof(struct ocfs2_truncate_rec); 1163 } 1164 1165 static inline u64 ocfs2_backup_super_blkno(struct super_block *sb, int index) 1166 { 1167 u64 offset = OCFS2_BACKUP_SB_START; 1168 1169 if (index >= 0 && index < OCFS2_MAX_BACKUP_SUPERBLOCKS) { 1170 offset <<= (2 * index); 1171 offset >>= sb->s_blocksize_bits; 1172 return offset; 1173 } 1174 1175 return 0; 1176 1177 } 1178 1179 static inline u16 ocfs2_xattr_recs_per_xb(struct super_block *sb) 1180 { 1181 int size; 1182 1183 size = sb->s_blocksize - 1184 offsetof(struct ocfs2_xattr_block, 1185 xb_attrs.xb_root.xt_list.l_recs); 1186 1187 return size / sizeof(struct ocfs2_extent_rec); 1188 } 1189 #else 1190 static inline int ocfs2_fast_symlink_chars(int blocksize) 1191 { 1192 return blocksize - offsetof(struct ocfs2_dinode, id2.i_symlink); 1193 } 1194 1195 static inline int ocfs2_max_inline_data(int blocksize) 1196 { 1197 return blocksize - offsetof(struct ocfs2_dinode, id2.i_data.id_data); 1198 } 1199 1200 static inline int ocfs2_extent_recs_per_inode(int blocksize) 1201 { 1202 int size; 1203 1204 size = blocksize - 1205 offsetof(struct ocfs2_dinode, id2.i_list.l_recs); 1206 1207 return size / sizeof(struct ocfs2_extent_rec); 1208 } 1209 1210 static inline int ocfs2_chain_recs_per_inode(int blocksize) 1211 { 1212 int size; 1213 1214 size = blocksize - 1215 offsetof(struct ocfs2_dinode, id2.i_chain.cl_recs); 1216 1217 return size / sizeof(struct ocfs2_chain_rec); 1218 } 1219 1220 static inline int ocfs2_extent_recs_per_eb(int blocksize) 1221 { 1222 int size; 1223 1224 size = blocksize - 1225 offsetof(struct ocfs2_extent_block, h_list.l_recs); 1226 1227 return size / sizeof(struct ocfs2_extent_rec); 1228 } 1229 1230 static inline int ocfs2_local_alloc_size(int blocksize) 1231 { 1232 int size; 1233 1234 size = blocksize - 1235 offsetof(struct ocfs2_dinode, id2.i_lab.la_bitmap); 1236 1237 return size; 1238 } 1239 1240 static inline int ocfs2_group_bitmap_size(int blocksize) 1241 { 1242 int size; 1243 1244 size = blocksize - 1245 offsetof(struct ocfs2_group_desc, bg_bitmap); 1246 1247 return size; 1248 } 1249 1250 static inline int ocfs2_truncate_recs_per_inode(int blocksize) 1251 { 1252 int size; 1253 1254 size = blocksize - 1255 offsetof(struct ocfs2_dinode, id2.i_dealloc.tl_recs); 1256 1257 return size / sizeof(struct ocfs2_truncate_rec); 1258 } 1259 1260 static inline uint64_t ocfs2_backup_super_blkno(int blocksize, int index) 1261 { 1262 uint64_t offset = OCFS2_BACKUP_SB_START; 1263 1264 if (index >= 0 && index < OCFS2_MAX_BACKUP_SUPERBLOCKS) { 1265 offset <<= (2 * index); 1266 offset /= blocksize; 1267 return offset; 1268 } 1269 1270 return 0; 1271 } 1272 1273 static inline int ocfs2_xattr_recs_per_xb(int blocksize) 1274 { 1275 int size; 1276 1277 size = blocksize - 1278 offsetof(struct ocfs2_xattr_block, 1279 xb_attrs.xb_root.xt_list.l_recs); 1280 1281 return size / sizeof(struct ocfs2_extent_rec); 1282 } 1283 #endif /* __KERNEL__ */ 1284 1285 1286 static inline int ocfs2_system_inode_is_global(int type) 1287 { 1288 return ((type >= 0) && 1289 (type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE)); 1290 } 1291 1292 static inline int ocfs2_sprintf_system_inode_name(char *buf, int len, 1293 int type, int slot) 1294 { 1295 int chars; 1296 1297 /* 1298 * Global system inodes can only have one copy. Everything 1299 * after OCFS2_LAST_GLOBAL_SYSTEM_INODE in the system inode 1300 * list has a copy per slot. 1301 */ 1302 if (type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE) 1303 chars = snprintf(buf, len, "%s", 1304 ocfs2_system_inodes[type].si_name); 1305 else 1306 chars = snprintf(buf, len, 1307 ocfs2_system_inodes[type].si_name, 1308 slot); 1309 1310 return chars; 1311 } 1312 1313 static inline void ocfs2_set_de_type(struct ocfs2_dir_entry *de, 1314 umode_t mode) 1315 { 1316 de->file_type = ocfs2_type_by_mode[(mode & S_IFMT)>>S_SHIFT]; 1317 } 1318 1319 #endif /* _OCFS2_FS_H */ 1320 1321