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b626fb59 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 | ||
19 | #ifndef __XFS_MOUNT_H__ | |
20 | #define __XFS_MOUNT_H__ | |
21 | ||
22 | struct xfs_inode; | |
23 | struct xfs_buftarg; | |
24 | struct xfs_dir_ops; | |
25 | struct xfs_da_geometry; | |
26 | ||
27 | /* | |
28 | * Define a user-level mount structure with all we need | |
29 | * in order to make use of the numerous XFS_* macros. | |
30 | */ | |
31 | typedef struct xfs_mount { | |
32 | xfs_sb_t m_sb; /* copy of fs superblock */ | |
33 | #define m_icount m_sb.sb_icount | |
34 | #define m_ifree m_sb.sb_ifree | |
35 | #define m_fdblocks m_sb.sb_fdblocks | |
36 | char *m_fsname; /* filesystem name */ | |
37 | int m_bsize; /* fs logical block size */ | |
38 | xfs_agnumber_t m_agfrotor; /* last ag where space found */ | |
39 | xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ | |
40 | xfs_agnumber_t m_maxagi; /* highest inode alloc group */ | |
41 | uint m_rsumlevels; /* rt summary levels */ | |
42 | uint m_rsumsize; /* size of rt summary, bytes */ | |
43 | struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ | |
44 | struct xfs_inode *m_rsumip; /* pointer to summary inode */ | |
45 | struct xfs_buftarg *m_ddev_targp; | |
46 | struct xfs_buftarg *m_logdev_targp; | |
47 | struct xfs_buftarg *m_rtdev_targp; | |
48 | #define m_dev m_ddev_targp | |
49 | #define m_logdev m_logdev_targp | |
50 | #define m_rtdev m_rtdev_targp | |
51 | __uint8_t m_dircook_elog; /* log d-cookie entry bits */ | |
52 | __uint8_t m_blkbit_log; /* blocklog + NBBY */ | |
53 | __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ | |
54 | __uint8_t m_sectbb_log; /* sectorlog - BBSHIFT */ | |
55 | __uint8_t m_agno_log; /* log #ag's */ | |
56 | __uint8_t m_agino_log; /* #bits for agino in inum */ | |
57 | uint m_inode_cluster_size;/* min inode buf size */ | |
58 | uint m_blockmask; /* sb_blocksize-1 */ | |
59 | uint m_blockwsize; /* sb_blocksize in words */ | |
60 | uint m_blockwmask; /* blockwsize-1 */ | |
61 | uint m_alloc_mxr[2]; /* XFS_ALLOC_BLOCK_MAXRECS */ | |
62 | uint m_alloc_mnr[2]; /* XFS_ALLOC_BLOCK_MINRECS */ | |
63 | uint m_bmap_dmxr[2]; /* XFS_BMAP_BLOCK_DMAXRECS */ | |
64 | uint m_bmap_dmnr[2]; /* XFS_BMAP_BLOCK_DMINRECS */ | |
65 | uint m_inobt_mxr[2]; /* XFS_INOBT_BLOCK_MAXRECS */ | |
66 | uint m_inobt_mnr[2]; /* XFS_INOBT_BLOCK_MINRECS */ | |
b3a96b46 DW |
67 | uint m_rmap_mxr[2]; /* max rmap btree records */ |
68 | uint m_rmap_mnr[2]; /* min rmap btree records */ | |
d8079fe0 DW |
69 | uint m_refc_mxr[2]; /* max refc btree records */ |
70 | uint m_refc_mnr[2]; /* min refc btree records */ | |
b626fb59 DC |
71 | uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */ |
72 | uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ | |
73 | uint m_in_maxlevels; /* XFS_IN_MAXLEVELS */ | |
b3a96b46 | 74 | uint m_rmap_maxlevels; /* max rmap btree levels */ |
d8079fe0 | 75 | uint m_refc_maxlevels; /* max refc btree levels */ |
ef5340cd | 76 | xfs_extlen_t m_ag_prealloc_blocks; /* reserved ag blocks */ |
b8a8d6e5 DW |
77 | uint m_alloc_set_aside; /* space we can't use */ |
78 | uint m_ag_max_usable; /* max space per AG */ | |
b626fb59 DC |
79 | struct radix_tree_root m_perag_tree; |
80 | uint m_flags; /* global mount flags */ | |
74e502ac | 81 | bool m_inotbt_nores; /* no per-AG finobt resv. */ |
b626fb59 DC |
82 | uint m_qflags; /* quota status flags */ |
83 | uint m_attroffset; /* inode attribute offset */ | |
84 | int m_ialloc_inos; /* inodes in inode allocation */ | |
85 | int m_ialloc_blks; /* blocks in inode allocation */ | |
62dc6cdb BF |
86 | int m_ialloc_min_blks; /* min blocks in sparse inode |
87 | * allocation */ | |
b626fb59 DC |
88 | int m_litino; /* size of inode union area */ |
89 | int m_inoalign_mask;/* mask sb_inoalignmt if used */ | |
90 | struct xfs_trans_resv m_resv; /* precomputed res values */ | |
91 | __uint64_t m_maxicount; /* maximum inode count */ | |
92 | int m_dalign; /* stripe unit */ | |
93 | int m_swidth; /* stripe width */ | |
94 | int m_sinoalign; /* stripe unit inode alignmnt */ | |
95 | const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ | |
96 | ||
97 | struct xfs_da_geometry *m_dir_geo; /* directory block geometry */ | |
98 | struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */ | |
99 | const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */ | |
100 | const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */ | |
101 | #define M_DIROPS(mp) ((mp)->m_dir_inode_ops) | |
102 | ||
103 | /* | |
104 | * anonymous struct to allow xfs_dquot_buf.c to compile. | |
105 | * Pointer is always null in userspace, so code does not use it at all | |
106 | */ | |
107 | struct { | |
108 | int qi_dqperchunk; | |
109 | } *m_quotainfo; | |
110 | ||
1d6cb115 BF |
111 | /* |
112 | * xlog is defined in libxlog and thus is not intialized by libxfs. This | |
113 | * allows an application to initialize and store a reference to the log | |
114 | * if warranted. | |
115 | */ | |
116 | struct xlog *m_log; | |
b626fb59 DC |
117 | } xfs_mount_t; |
118 | ||
cf8ce220 DW |
119 | /* per-AG block reservation data structures*/ |
120 | enum xfs_ag_resv_type { | |
121 | XFS_AG_RESV_NONE = 0, | |
122 | XFS_AG_RESV_METADATA, | |
123 | XFS_AG_RESV_AGFL, | |
124 | }; | |
125 | ||
126 | struct xfs_ag_resv { | |
127 | /* number of blocks originally reserved here */ | |
128 | xfs_extlen_t ar_orig_reserved; | |
129 | /* number of blocks reserved here */ | |
130 | xfs_extlen_t ar_reserved; | |
131 | /* number of blocks originally asked for */ | |
132 | xfs_extlen_t ar_asked; | |
133 | }; | |
134 | ||
b626fb59 DC |
135 | /* |
136 | * Per-ag incore structure, copies of information in agf and agi, | |
137 | * to improve the performance of allocation group selection. | |
138 | */ | |
139 | typedef struct xfs_perag { | |
140 | struct xfs_mount *pag_mount; /* owner filesystem */ | |
141 | xfs_agnumber_t pag_agno; /* AG this structure belongs to */ | |
142 | atomic_t pag_ref; /* perag reference count */ | |
143 | char pagf_init; /* this agf's entry is initialized */ | |
144 | char pagi_init; /* this agi's entry is initialized */ | |
145 | char pagf_metadata; /* the agf is preferred to be metadata */ | |
146 | char pagi_inodeok; /* The agi is ok for inodes */ | |
147 | __uint8_t pagf_levels[XFS_BTNUM_AGF]; | |
148 | /* # of levels in bno & cnt btree */ | |
149 | __uint32_t pagf_flcount; /* count of blocks in freelist */ | |
150 | xfs_extlen_t pagf_freeblks; /* total free blocks */ | |
151 | xfs_extlen_t pagf_longest; /* longest free space */ | |
152 | __uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */ | |
153 | xfs_agino_t pagi_freecount; /* number of free inodes */ | |
154 | xfs_agino_t pagi_count; /* number of allocated inodes */ | |
155 | ||
156 | /* | |
157 | * Inode allocation search lookup optimisation. | |
158 | * If the pagino matches, the search for new inodes | |
159 | * doesn't need to search the near ones again straight away | |
160 | */ | |
161 | xfs_agino_t pagl_pagino; | |
162 | xfs_agino_t pagl_leftrec; | |
163 | xfs_agino_t pagl_rightrec; | |
164 | int pagb_count; /* pagb slots in use */ | |
cf8ce220 DW |
165 | |
166 | /* Blocks reserved for all kinds of metadata. */ | |
167 | struct xfs_ag_resv pag_meta_resv; | |
168 | /* Blocks reserved for just AGFL-based metadata. */ | |
169 | struct xfs_ag_resv pag_agfl_resv; | |
170 | ||
88ce0792 DW |
171 | /* reference count */ |
172 | __uint8_t pagf_refcount_level; | |
b626fb59 DC |
173 | } xfs_perag_t; |
174 | ||
cf8ce220 DW |
175 | static inline struct xfs_ag_resv * |
176 | xfs_perag_resv( | |
177 | struct xfs_perag *pag, | |
178 | enum xfs_ag_resv_type type) | |
179 | { | |
180 | switch (type) { | |
181 | case XFS_AG_RESV_METADATA: | |
182 | return &pag->pag_meta_resv; | |
183 | case XFS_AG_RESV_AGFL: | |
184 | return &pag->pag_agfl_resv; | |
185 | default: | |
186 | return NULL; | |
187 | } | |
188 | } | |
189 | ||
b626fb59 DC |
190 | #define LIBXFS_MOUNT_DEBUGGER 0x0001 |
191 | #define LIBXFS_MOUNT_32BITINODES 0x0002 | |
192 | #define LIBXFS_MOUNT_32BITINOOPT 0x0004 | |
193 | #define LIBXFS_MOUNT_COMPAT_ATTR 0x0008 | |
194 | #define LIBXFS_MOUNT_ATTR2 0x0010 | |
23639f77 | 195 | #define LIBXFS_MOUNT_WANT_CORRUPTED 0x0020 |
b626fb59 DC |
196 | |
197 | #define LIBXFS_BHASHSIZE(sbp) (1<<10) | |
198 | ||
199 | extern xfs_mount_t *libxfs_mount (xfs_mount_t *, xfs_sb_t *, | |
200 | dev_t, dev_t, dev_t, int); | |
201 | extern void libxfs_umount (xfs_mount_t *); | |
202 | extern void libxfs_rtmount_destroy (xfs_mount_t *); | |
203 | ||
204 | #endif /* __XFS_MOUNT_H__ */ |