1 /* 2 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #ifndef __XFS_TYPES_H__ 19 #define __XFS_TYPES_H__ 20 21 typedef uint32_t prid_t; /* project ID */ 22 23 typedef uint32_t xfs_agblock_t; /* blockno in alloc. group */ 24 typedef uint32_t xfs_agino_t; /* inode # within allocation grp */ 25 typedef uint32_t xfs_extlen_t; /* extent length in blocks */ 26 typedef uint32_t xfs_agnumber_t; /* allocation group number */ 27 typedef int32_t xfs_extnum_t; /* # of extents in a file */ 28 typedef int16_t xfs_aextnum_t; /* # extents in an attribute fork */ 29 typedef int64_t xfs_fsize_t; /* bytes in a file */ 30 typedef uint64_t xfs_ufsize_t; /* unsigned bytes in a file */ 31 32 typedef int32_t xfs_suminfo_t; /* type of bitmap summary info */ 33 typedef int32_t xfs_rtword_t; /* word type for bitmap manipulations */ 34 35 typedef int64_t xfs_lsn_t; /* log sequence number */ 36 typedef int32_t xfs_tid_t; /* transaction identifier */ 37 38 typedef uint32_t xfs_dablk_t; /* dir/attr block number (in file) */ 39 typedef uint32_t xfs_dahash_t; /* dir/attr hash value */ 40 41 typedef uint64_t xfs_fsblock_t; /* blockno in filesystem (agno|agbno) */ 42 typedef uint64_t xfs_rfsblock_t; /* blockno in filesystem (raw) */ 43 typedef uint64_t xfs_rtblock_t; /* extent (block) in realtime area */ 44 typedef uint64_t xfs_fileoff_t; /* block number in a file */ 45 typedef uint64_t xfs_filblks_t; /* number of blocks in a file */ 46 47 typedef int64_t xfs_srtblock_t; /* signed version of xfs_rtblock_t */ 48 typedef int64_t xfs_sfiloff_t; /* signed block number in a file */ 49 50 /* 51 * Null values for the types. 52 */ 53 #define NULLFSBLOCK ((xfs_fsblock_t)-1) 54 #define NULLRFSBLOCK ((xfs_rfsblock_t)-1) 55 #define NULLRTBLOCK ((xfs_rtblock_t)-1) 56 #define NULLFILEOFF ((xfs_fileoff_t)-1) 57 58 #define NULLAGBLOCK ((xfs_agblock_t)-1) 59 #define NULLAGNUMBER ((xfs_agnumber_t)-1) 60 61 #define NULLCOMMITLSN ((xfs_lsn_t)-1) 62 63 #define NULLFSINO ((xfs_ino_t)-1) 64 #define NULLAGINO ((xfs_agino_t)-1) 65 66 /* 67 * Max values for extlen, extnum, aextnum. 68 */ 69 #define MAXEXTLEN ((xfs_extlen_t)0x001fffff) /* 21 bits */ 70 #define MAXEXTNUM ((xfs_extnum_t)0x7fffffff) /* signed int */ 71 #define MAXAEXTNUM ((xfs_aextnum_t)0x7fff) /* signed short */ 72 73 /* 74 * Minimum and maximum blocksize and sectorsize. 75 * The blocksize upper limit is pretty much arbitrary. 76 * The sectorsize upper limit is due to sizeof(sb_sectsize). 77 * CRC enable filesystems use 512 byte inodes, meaning 512 byte block sizes 78 * cannot be used. 79 */ 80 #define XFS_MIN_BLOCKSIZE_LOG 9 /* i.e. 512 bytes */ 81 #define XFS_MAX_BLOCKSIZE_LOG 16 /* i.e. 65536 bytes */ 82 #define XFS_MIN_BLOCKSIZE (1 << XFS_MIN_BLOCKSIZE_LOG) 83 #define XFS_MAX_BLOCKSIZE (1 << XFS_MAX_BLOCKSIZE_LOG) 84 #define XFS_MIN_CRC_BLOCKSIZE (1 << (XFS_MIN_BLOCKSIZE_LOG + 1)) 85 #define XFS_MIN_SECTORSIZE_LOG 9 /* i.e. 512 bytes */ 86 #define XFS_MAX_SECTORSIZE_LOG 15 /* i.e. 32768 bytes */ 87 #define XFS_MIN_SECTORSIZE (1 << XFS_MIN_SECTORSIZE_LOG) 88 #define XFS_MAX_SECTORSIZE (1 << XFS_MAX_SECTORSIZE_LOG) 89 90 /* 91 * Inode fork identifiers. 92 */ 93 #define XFS_DATA_FORK 0 94 #define XFS_ATTR_FORK 1 95 #define XFS_COW_FORK 2 96 97 /* 98 * Min numbers of data/attr fork btree root pointers. 99 */ 100 #define MINDBTPTRS 3 101 #define MINABTPTRS 2 102 103 /* 104 * MAXNAMELEN is the length (including the terminating null) of 105 * the longest permissible file (component) name. 106 */ 107 #define MAXNAMELEN 256 108 109 typedef enum { 110 XFS_LOOKUP_EQi, XFS_LOOKUP_LEi, XFS_LOOKUP_GEi 111 } xfs_lookup_t; 112 113 typedef enum { 114 XFS_BTNUM_BNOi, XFS_BTNUM_CNTi, XFS_BTNUM_RMAPi, XFS_BTNUM_BMAPi, 115 XFS_BTNUM_INOi, XFS_BTNUM_FINOi, XFS_BTNUM_REFCi, XFS_BTNUM_MAX 116 } xfs_btnum_t; 117 118 struct xfs_name { 119 const unsigned char *name; 120 int len; 121 int type; 122 }; 123 124 /* 125 * uid_t and gid_t are hard-coded to 32 bits in the inode. 126 * Hence, an 'id' in a dquot is 32 bits.. 127 */ 128 typedef uint32_t xfs_dqid_t; 129 130 /* 131 * Constants for bit manipulations. 132 */ 133 #define XFS_NBBYLOG 3 /* log2(NBBY) */ 134 #define XFS_WORDLOG 2 /* log2(sizeof(xfs_rtword_t)) */ 135 #define XFS_NBWORDLOG (XFS_NBBYLOG + XFS_WORDLOG) 136 #define XFS_NBWORD (1 << XFS_NBWORDLOG) 137 #define XFS_WORDMASK ((1 << XFS_WORDLOG) - 1) 138 139 140 #endif /* __XFS_TYPES_H__ */ 141