Commit | Line | Data |
---|---|---|
6ca1c906 DC |
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_FORMAT_H__ | |
19 | #define __XFS_FORMAT_H__ | |
20 | ||
21 | /* | |
22 | * XFS On Disk Format Definitions | |
23 | * | |
24 | * This header file defines all the on-disk format definitions for | |
25 | * general XFS objects. Directory and attribute related objects are defined in | |
26 | * xfs_da_format.h, which log and log item formats are defined in | |
27 | * xfs_log_format.h. Everything else goes here. | |
28 | */ | |
29 | ||
1fb7e48d DC |
30 | struct xfs_mount; |
31 | struct xfs_trans; | |
32 | struct xfs_inode; | |
33 | struct xfs_buf; | |
34 | struct xfs_ifork; | |
35 | ||
c7298202 DC |
36 | /* |
37 | * RealTime Device format definitions | |
38 | */ | |
39 | ||
40 | /* Min and max rt extent sizes, specified in bytes */ | |
41 | #define XFS_MAX_RTEXTSIZE (1024 * 1024 * 1024) /* 1GB */ | |
42 | #define XFS_DFL_RTEXTSIZE (64 * 1024) /* 64kB */ | |
43 | #define XFS_MIN_RTEXTSIZE (4 * 1024) /* 4kB */ | |
44 | ||
45 | #define XFS_BLOCKSIZE(mp) ((mp)->m_sb.sb_blocksize) | |
46 | #define XFS_BLOCKMASK(mp) ((mp)->m_blockmask) | |
47 | #define XFS_BLOCKWSIZE(mp) ((mp)->m_blockwsize) | |
48 | #define XFS_BLOCKWMASK(mp) ((mp)->m_blockwmask) | |
49 | ||
50 | /* | |
51 | * RT Summary and bit manipulation macros. | |
52 | */ | |
53 | #define XFS_SUMOFFS(mp,ls,bb) ((int)((ls) * (mp)->m_sb.sb_rbmblocks + (bb))) | |
54 | #define XFS_SUMOFFSTOBLOCK(mp,s) \ | |
55 | (((s) * (uint)sizeof(xfs_suminfo_t)) >> (mp)->m_sb.sb_blocklog) | |
56 | #define XFS_SUMPTR(mp,bp,so) \ | |
57 | ((xfs_suminfo_t *)((bp)->b_addr + \ | |
58 | (((so) * (uint)sizeof(xfs_suminfo_t)) & XFS_BLOCKMASK(mp)))) | |
59 | ||
60 | #define XFS_BITTOBLOCK(mp,bi) ((bi) >> (mp)->m_blkbit_log) | |
61 | #define XFS_BLOCKTOBIT(mp,bb) ((bb) << (mp)->m_blkbit_log) | |
62 | #define XFS_BITTOWORD(mp,bi) \ | |
63 | ((int)(((bi) >> XFS_NBWORDLOG) & XFS_BLOCKWMASK(mp))) | |
64 | ||
65 | #define XFS_RTMIN(a,b) ((a) < (b) ? (a) : (b)) | |
66 | #define XFS_RTMAX(a,b) ((a) > (b) ? (a) : (b)) | |
67 | ||
68 | #define XFS_RTLOBIT(w) xfs_lowbit32(w) | |
69 | #define XFS_RTHIBIT(w) xfs_highbit32(w) | |
70 | ||
71 | #if XFS_BIG_BLKNOS | |
72 | #define XFS_RTBLOCKLOG(b) xfs_highbit64(b) | |
73 | #else | |
74 | #define XFS_RTBLOCKLOG(b) xfs_highbit32(b) | |
75 | #endif | |
76 | ||
6ca1c906 DC |
77 | /* |
78 | * Dquot and dquot block format definitions | |
79 | */ | |
80 | #define XFS_DQUOT_MAGIC 0x4451 /* 'DQ' */ | |
81 | #define XFS_DQUOT_VERSION (u_int8_t)0x01 /* latest version number */ | |
82 | ||
83 | /* | |
84 | * This is the main portion of the on-disk representation of quota | |
85 | * information for a user. This is the q_core of the xfs_dquot_t that | |
86 | * is kept in kernel memory. We pad this with some more expansion room | |
87 | * to construct the on disk structure. | |
88 | */ | |
89 | typedef struct xfs_disk_dquot { | |
90 | __be16 d_magic; /* dquot magic = XFS_DQUOT_MAGIC */ | |
91 | __u8 d_version; /* dquot version */ | |
92 | __u8 d_flags; /* XFS_DQ_USER/PROJ/GROUP */ | |
93 | __be32 d_id; /* user,project,group id */ | |
94 | __be64 d_blk_hardlimit;/* absolute limit on disk blks */ | |
95 | __be64 d_blk_softlimit;/* preferred limit on disk blks */ | |
96 | __be64 d_ino_hardlimit;/* maximum # allocated inodes */ | |
97 | __be64 d_ino_softlimit;/* preferred inode limit */ | |
98 | __be64 d_bcount; /* disk blocks owned by the user */ | |
99 | __be64 d_icount; /* inodes owned by the user */ | |
100 | __be32 d_itimer; /* zero if within inode limits if not, | |
101 | this is when we refuse service */ | |
102 | __be32 d_btimer; /* similar to above; for disk blocks */ | |
103 | __be16 d_iwarns; /* warnings issued wrt num inodes */ | |
104 | __be16 d_bwarns; /* warnings issued wrt disk blocks */ | |
105 | __be32 d_pad0; /* 64 bit align */ | |
106 | __be64 d_rtb_hardlimit;/* absolute limit on realtime blks */ | |
107 | __be64 d_rtb_softlimit;/* preferred limit on RT disk blks */ | |
108 | __be64 d_rtbcount; /* realtime blocks owned */ | |
109 | __be32 d_rtbtimer; /* similar to above; for RT disk blocks */ | |
110 | __be16 d_rtbwarns; /* warnings issued wrt RT disk blocks */ | |
111 | __be16 d_pad; | |
112 | } xfs_disk_dquot_t; | |
113 | ||
114 | /* | |
115 | * This is what goes on disk. This is separated from the xfs_disk_dquot because | |
116 | * carrying the unnecessary padding would be a waste of memory. | |
117 | */ | |
118 | typedef struct xfs_dqblk { | |
119 | xfs_disk_dquot_t dd_diskdq; /* portion that lives incore as well */ | |
120 | char dd_fill[4]; /* filling for posterity */ | |
121 | ||
122 | /* | |
123 | * These two are only present on filesystems with the CRC bits set. | |
124 | */ | |
125 | __be32 dd_crc; /* checksum */ | |
126 | __be64 dd_lsn; /* last modification in log */ | |
127 | uuid_t dd_uuid; /* location information */ | |
128 | } xfs_dqblk_t; | |
129 | ||
130 | #define XFS_DQUOT_CRC_OFF offsetof(struct xfs_dqblk, dd_crc) | |
131 | ||
1fb7e48d DC |
132 | /* |
133 | * Remote symlink format and access functions. | |
134 | */ | |
135 | #define XFS_SYMLINK_MAGIC 0x58534c4d /* XSLM */ | |
136 | ||
137 | struct xfs_dsymlink_hdr { | |
138 | __be32 sl_magic; | |
139 | __be32 sl_offset; | |
140 | __be32 sl_bytes; | |
141 | __be32 sl_crc; | |
142 | uuid_t sl_uuid; | |
143 | __be64 sl_owner; | |
144 | __be64 sl_blkno; | |
145 | __be64 sl_lsn; | |
146 | }; | |
147 | ||
148 | /* | |
149 | * The maximum pathlen is 1024 bytes. Since the minimum file system | |
150 | * blocksize is 512 bytes, we can get a max of 3 extents back from | |
151 | * bmapi when crc headers are taken into account. | |
152 | */ | |
153 | #define XFS_SYMLINK_MAPS 3 | |
154 | ||
155 | #define XFS_SYMLINK_BUF_SPACE(mp, bufsize) \ | |
156 | ((bufsize) - (xfs_sb_version_hascrc(&(mp)->m_sb) ? \ | |
157 | sizeof(struct xfs_dsymlink_hdr) : 0)) | |
158 | ||
6ca1c906 | 159 | #endif /* __XFS_FORMAT_H__ */ |