1/* 2 * Copyright (c) 2000,2002,2005 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_DINODE_H__ 19#define __XFS_DINODE_H__ 20 21#define XFS_DINODE_MAGIC 0x494e /* 'IN' */ 22#define XFS_DINODE_GOOD_VERSION(v) (((v) == 1 || (v) == 2)) 23 24typedef struct xfs_timestamp { 25 __be32 t_sec; /* timestamp seconds */ 26 __be32 t_nsec; /* timestamp nanoseconds */ 27} xfs_timestamp_t; 28 29/* 30 * On-disk inode structure. 31 * 32 * This is just the header or "dinode core", the inode is expanded to fill a 33 * variable size the leftover area split into a data and an attribute fork. 34 * The format of the data and attribute fork depends on the format of the 35 * inode as indicated by di_format and di_aformat. To access the data and 36 * attribute use the XFS_DFORK_PTR, XFS_DFORK_DPTR, and XFS_DFORK_PTR macros 37 * below. 38 * 39 * There is a very similar struct icdinode in xfs_inode which matches the 40 * layout of the first 96 bytes of this structure, but is kept in native 41 * format instead of big endian. 42 */ 43typedef struct xfs_dinode { 44 __be16 di_magic; /* inode magic # = XFS_DINODE_MAGIC */ 45 __be16 di_mode; /* mode and type of file */ 46 __u8 di_version; /* inode version */ 47 __u8 di_format; /* format of di_c data */ 48 __be16 di_onlink; /* old number of links to file */ 49 __be32 di_uid; /* owner's user id */ 50 __be32 di_gid; /* owner's group id */ 51 __be32 di_nlink; /* number of links to file */ 52 __be16 di_projid; /* owner's project id */ 53 __u8 di_pad[8]; /* unused, zeroed space */ 54 __be16 di_flushiter; /* incremented on flush */ 55 xfs_timestamp_t di_atime; /* time last accessed */ 56 xfs_timestamp_t di_mtime; /* time last modified */ 57 xfs_timestamp_t di_ctime; /* time created/inode modified */ 58 __be64 di_size; /* number of bytes in file */ 59 __be64 di_nblocks; /* # of direct & btree blocks used */ 60 __be32 di_extsize; /* basic/minimum extent size for file */ 61 __be32 di_nextents; /* number of extents in data fork */ 62 __be16 di_anextents; /* number of extents in attribute fork*/ 63 __u8 di_forkoff; /* attr fork offs, <<3 for 64b align */ 64 __s8 di_aformat; /* format of attr fork's data */ 65 __be32 di_dmevmask; /* DMIG event mask */ 66 __be16 di_dmstate; /* DMIG state info */ 67 __be16 di_flags; /* random flags, XFS_DIFLAG_... */ 68 __be32 di_gen; /* generation number */ 69 70 /* di_next_unlinked is the only non-core field in the old dinode */ 71 __be32 di_next_unlinked;/* agi unlinked list ptr */ 72} __attribute__((packed)) xfs_dinode_t; 73 74#define DI_MAX_FLUSH 0xffff 75 76/* 77 * The 32 bit link count in the inode theoretically maxes out at UINT_MAX. 78 * Since the pathconf interface is signed, we use 2^31 - 1 instead. 79 * The old inode format had a 16 bit link count, so its maximum is USHRT_MAX. 80 */ 81#define XFS_MAXLINK ((1U << 31) - 1U) 82#define XFS_MAXLINK_1 65535U 83 84/* 85 * Values for di_format 86 */ 87typedef enum xfs_dinode_fmt { 88 XFS_DINODE_FMT_DEV, /* xfs_dev_t */ 89 XFS_DINODE_FMT_LOCAL, /* bulk data */ 90 XFS_DINODE_FMT_EXTENTS, /* struct xfs_bmbt_rec */ 91 XFS_DINODE_FMT_BTREE, /* struct xfs_bmdr_block */ 92 XFS_DINODE_FMT_UUID /* uuid_t */ 93} xfs_dinode_fmt_t; 94 95/* 96 * Inode minimum and maximum sizes. 97 */ 98#define XFS_DINODE_MIN_LOG 8 99#define XFS_DINODE_MAX_LOG 11 100#define XFS_DINODE_MIN_SIZE (1 << XFS_DINODE_MIN_LOG) 101#define XFS_DINODE_MAX_SIZE (1 << XFS_DINODE_MAX_LOG) 102 103/* 104 * Inode size for given fs. 105 */ 106#define XFS_LITINO(mp) \ 107 ((int)(((mp)->m_sb.sb_inodesize) - sizeof(struct xfs_dinode))) 108 109#define XFS_BROOT_SIZE_ADJ \ 110 (XFS_BTREE_LBLOCK_LEN - sizeof(xfs_bmdr_block_t)) 111 112/* 113 * Inode data & attribute fork sizes, per inode. 114 */ 115#define XFS_DFORK_Q(dip) ((dip)->di_forkoff != 0) 116#define XFS_DFORK_BOFF(dip) ((int)((dip)->di_forkoff << 3)) 117 118#define XFS_DFORK_DSIZE(dip,mp) \ 119 (XFS_DFORK_Q(dip) ? \ 120 XFS_DFORK_BOFF(dip) : \ 121 XFS_LITINO(mp)) 122#define XFS_DFORK_ASIZE(dip,mp) \ 123 (XFS_DFORK_Q(dip) ? \ 124 XFS_LITINO(mp) - XFS_DFORK_BOFF(dip) : \ 125 0) 126#define XFS_DFORK_SIZE(dip,mp,w) \ 127 ((w) == XFS_DATA_FORK ? \ 128 XFS_DFORK_DSIZE(dip, mp) : \ 129 XFS_DFORK_ASIZE(dip, mp)) 130 131/* 132 * Return pointers to the data or attribute forks. 133 */ 134#define XFS_DFORK_DPTR(dip) \ 135 ((char *)(dip) + sizeof(struct xfs_dinode)) 136#define XFS_DFORK_APTR(dip) \ 137 (XFS_DFORK_DPTR(dip) + XFS_DFORK_BOFF(dip)) 138#define XFS_DFORK_PTR(dip,w) \ 139 ((w) == XFS_DATA_FORK ? XFS_DFORK_DPTR(dip) : XFS_DFORK_APTR(dip)) 140 141#define XFS_DFORK_FORMAT(dip,w) \ 142 ((w) == XFS_DATA_FORK ? \ 143 (dip)->di_format : \ 144 (dip)->di_aformat) 145#define XFS_DFORK_NEXTENTS(dip,w) \ 146 ((w) == XFS_DATA_FORK ? \ 147 be32_to_cpu((dip)->di_nextents) : \ 148 be16_to_cpu((dip)->di_anextents)) 149 150#define XFS_BUF_TO_DINODE(bp) ((xfs_dinode_t *)XFS_BUF_PTR(bp)) 151 152/* 153 * For block and character special files the 32bit dev_t is stored at the 154 * beginning of the data fork. 155 */ 156static inline xfs_dev_t xfs_dinode_get_rdev(struct xfs_dinode *dip) 157{ 158 return be32_to_cpu(*(__be32 *)XFS_DFORK_DPTR(dip)); 159} 160 161static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev) 162{ 163 *(__be32 *)XFS_DFORK_DPTR(dip) = cpu_to_be32(rdev); 164} 165 166/* 167 * Values for di_flags 168 * There should be a one-to-one correspondence between these flags and the 169 * XFS_XFLAG_s. 170 */ 171#define XFS_DIFLAG_REALTIME_BIT 0 /* file's blocks come from rt area */ 172#define XFS_DIFLAG_PREALLOC_BIT 1 /* file space has been preallocated */ 173#define XFS_DIFLAG_NEWRTBM_BIT 2 /* for rtbitmap inode, new format */ 174#define XFS_DIFLAG_IMMUTABLE_BIT 3 /* inode is immutable */ 175#define XFS_DIFLAG_APPEND_BIT 4 /* inode is append-only */ 176#define XFS_DIFLAG_SYNC_BIT 5 /* inode is written synchronously */ 177#define XFS_DIFLAG_NOATIME_BIT 6 /* do not update atime */ 178#define XFS_DIFLAG_NODUMP_BIT 7 /* do not dump */ 179#define XFS_DIFLAG_RTINHERIT_BIT 8 /* create with realtime bit set */ 180#define XFS_DIFLAG_PROJINHERIT_BIT 9 /* create with parents projid */ 181#define XFS_DIFLAG_NOSYMLINKS_BIT 10 /* disallow symlink creation */ 182#define XFS_DIFLAG_EXTSIZE_BIT 11 /* inode extent size allocator hint */ 183#define XFS_DIFLAG_EXTSZINHERIT_BIT 12 /* inherit inode extent size */ 184#define XFS_DIFLAG_NODEFRAG_BIT 13 /* do not reorganize/defragment */ 185#define XFS_DIFLAG_FILESTREAM_BIT 14 /* use filestream allocator */ 186#define XFS_DIFLAG_REALTIME (1 << XFS_DIFLAG_REALTIME_BIT) 187#define XFS_DIFLAG_PREALLOC (1 << XFS_DIFLAG_PREALLOC_BIT) 188#define XFS_DIFLAG_NEWRTBM (1 << XFS_DIFLAG_NEWRTBM_BIT) 189#define XFS_DIFLAG_IMMUTABLE (1 << XFS_DIFLAG_IMMUTABLE_BIT) 190#define XFS_DIFLAG_APPEND (1 << XFS_DIFLAG_APPEND_BIT) 191#define XFS_DIFLAG_SYNC (1 << XFS_DIFLAG_SYNC_BIT) 192#define XFS_DIFLAG_NOATIME (1 << XFS_DIFLAG_NOATIME_BIT) 193#define XFS_DIFLAG_NODUMP (1 << XFS_DIFLAG_NODUMP_BIT) 194#define XFS_DIFLAG_RTINHERIT (1 << XFS_DIFLAG_RTINHERIT_BIT) 195#define XFS_DIFLAG_PROJINHERIT (1 << XFS_DIFLAG_PROJINHERIT_BIT) 196#define XFS_DIFLAG_NOSYMLINKS (1 << XFS_DIFLAG_NOSYMLINKS_BIT) 197#define XFS_DIFLAG_EXTSIZE (1 << XFS_DIFLAG_EXTSIZE_BIT) 198#define XFS_DIFLAG_EXTSZINHERIT (1 << XFS_DIFLAG_EXTSZINHERIT_BIT) 199#define XFS_DIFLAG_NODEFRAG (1 << XFS_DIFLAG_NODEFRAG_BIT) 200#define XFS_DIFLAG_FILESTREAM (1 << XFS_DIFLAG_FILESTREAM_BIT) 201 202#ifdef CONFIG_XFS_RT 203#define XFS_IS_REALTIME_INODE(ip) ((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME) 204#else 205#define XFS_IS_REALTIME_INODE(ip) (0) 206#endif 207 208#define XFS_DIFLAG_ANY \ 209 (XFS_DIFLAG_REALTIME | XFS_DIFLAG_PREALLOC | XFS_DIFLAG_NEWRTBM | \ 210 XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND | XFS_DIFLAG_SYNC | \ 211 XFS_DIFLAG_NOATIME | XFS_DIFLAG_NODUMP | XFS_DIFLAG_RTINHERIT | \ 212 XFS_DIFLAG_PROJINHERIT | XFS_DIFLAG_NOSYMLINKS | XFS_DIFLAG_EXTSIZE | \ 213 XFS_DIFLAG_EXTSZINHERIT | XFS_DIFLAG_NODEFRAG | XFS_DIFLAG_FILESTREAM) 214 215#endif /* __XFS_DINODE_H__ */ 216