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0b61f8a4 | 1 | // SPDX-License-Identifier: GPL-2.0 |
70a9883c DC |
2 | /* |
3 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. | |
4 | * Copyright (c) 2013 Red Hat, Inc. | |
5 | * All Rights Reserved. | |
70a9883c DC |
6 | */ |
7 | #ifndef __XFS_SHARED_H__ | |
8 | #define __XFS_SHARED_H__ | |
9 | ||
10 | /* | |
11 | * Definitions shared between kernel and userspace that don't fit into any other | |
12 | * header file that is shared with userspace. | |
13 | */ | |
14 | struct xfs_ifork; | |
15 | struct xfs_buf; | |
16 | struct xfs_buf_ops; | |
17 | struct xfs_mount; | |
18 | struct xfs_trans; | |
19 | struct xfs_inode; | |
20 | ||
21 | /* | |
22 | * Buffer verifier operations are widely used, including userspace tools | |
23 | */ | |
24 | extern const struct xfs_buf_ops xfs_agf_buf_ops; | |
70a9883c | 25 | extern const struct xfs_buf_ops xfs_agfl_buf_ops; |
5f7fd750 | 26 | extern const struct xfs_buf_ops xfs_agi_buf_ops; |
70a9883c DC |
27 | extern const struct xfs_buf_ops xfs_attr3_leaf_buf_ops; |
28 | extern const struct xfs_buf_ops xfs_attr3_rmt_buf_ops; | |
29 | extern const struct xfs_buf_ops xfs_bmbt_buf_ops; | |
5f7fd750 SZ |
30 | extern const struct xfs_buf_ops xfs_bnobt_buf_ops; |
31 | extern const struct xfs_buf_ops xfs_cntbt_buf_ops; | |
70a9883c DC |
32 | extern const struct xfs_buf_ops xfs_da3_node_buf_ops; |
33 | extern const struct xfs_buf_ops xfs_dquot_buf_ops; | |
5f7fd750 | 34 | extern const struct xfs_buf_ops xfs_dquot_buf_ra_ops; |
01e68f40 | 35 | extern const struct xfs_buf_ops xfs_finobt_buf_ops; |
5f7fd750 | 36 | extern const struct xfs_buf_ops xfs_inobt_buf_ops; |
70a9883c DC |
37 | extern const struct xfs_buf_ops xfs_inode_buf_ops; |
38 | extern const struct xfs_buf_ops xfs_inode_buf_ra_ops; | |
5f7fd750 SZ |
39 | extern const struct xfs_buf_ops xfs_refcountbt_buf_ops; |
40 | extern const struct xfs_buf_ops xfs_rmapbt_buf_ops; | |
41 | extern const struct xfs_buf_ops xfs_rtbuf_ops; | |
70a9883c DC |
42 | extern const struct xfs_buf_ops xfs_sb_buf_ops; |
43 | extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops; | |
44 | extern const struct xfs_buf_ops xfs_symlink_buf_ops; | |
45 | ||
d8d6df42 DW |
46 | /* btree ops */ |
47 | extern const struct xfs_btree_ops xfs_bnobt_ops; | |
48 | extern const struct xfs_btree_ops xfs_cntbt_ops; | |
49 | extern const struct xfs_btree_ops xfs_inobt_ops; | |
50 | extern const struct xfs_btree_ops xfs_finobt_ops; | |
51 | extern const struct xfs_btree_ops xfs_bmbt_ops; | |
52 | extern const struct xfs_btree_ops xfs_refcountbt_ops; | |
53 | extern const struct xfs_btree_ops xfs_rmapbt_ops; | |
4787fc80 | 54 | extern const struct xfs_btree_ops xfs_rmapbt_mem_ops; |
d8d6df42 | 55 | |
ec793e69 CH |
56 | static inline bool xfs_btree_is_bno(const struct xfs_btree_ops *ops) |
57 | { | |
58 | return ops == &xfs_bnobt_ops; | |
59 | } | |
60 | ||
61 | static inline bool xfs_btree_is_cnt(const struct xfs_btree_ops *ops) | |
62 | { | |
63 | return ops == &xfs_cntbt_ops; | |
64 | } | |
65 | ||
66 | static inline bool xfs_btree_is_bmap(const struct xfs_btree_ops *ops) | |
67 | { | |
68 | return ops == &xfs_bmbt_ops; | |
69 | } | |
70 | ||
71 | static inline bool xfs_btree_is_ino(const struct xfs_btree_ops *ops) | |
72 | { | |
73 | return ops == &xfs_inobt_ops; | |
74 | } | |
75 | ||
76 | static inline bool xfs_btree_is_fino(const struct xfs_btree_ops *ops) | |
77 | { | |
78 | return ops == &xfs_finobt_ops; | |
79 | } | |
80 | ||
81 | static inline bool xfs_btree_is_refcount(const struct xfs_btree_ops *ops) | |
82 | { | |
83 | return ops == &xfs_refcountbt_ops; | |
84 | } | |
85 | ||
86 | static inline bool xfs_btree_is_rmap(const struct xfs_btree_ops *ops) | |
87 | { | |
88 | return ops == &xfs_rmapbt_ops; | |
89 | } | |
90 | ||
4787fc80 DW |
91 | #ifdef CONFIG_XFS_BTREE_IN_MEM |
92 | static inline bool xfs_btree_is_mem_rmap(const struct xfs_btree_ops *ops) | |
93 | { | |
94 | return ops == &xfs_rmapbt_mem_ops; | |
95 | } | |
96 | #else | |
97 | # define xfs_btree_is_mem_rmap(...) (false) | |
98 | #endif | |
99 | ||
70a9883c DC |
100 | /* log size calculation functions */ |
101 | int xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes); | |
102 | int xfs_log_calc_minimum_size(struct xfs_mount *); | |
103 | ||
b872af2c DW |
104 | struct xfs_trans_res; |
105 | void xfs_log_get_max_trans_res(struct xfs_mount *mp, | |
106 | struct xfs_trans_res *max_resp); | |
70a9883c DC |
107 | |
108 | /* | |
109 | * Values for t_flags. | |
110 | */ | |
bb7b1c9c DC |
111 | /* Transaction needs to be logged */ |
112 | #define XFS_TRANS_DIRTY (1u << 0) | |
113 | /* Superblock is dirty and needs to be logged */ | |
114 | #define XFS_TRANS_SB_DIRTY (1u << 1) | |
115 | /* Transaction took a permanent log reservation */ | |
116 | #define XFS_TRANS_PERM_LOG_RES (1u << 2) | |
117 | /* Synchronous transaction commit needed */ | |
118 | #define XFS_TRANS_SYNC (1u << 3) | |
119 | /* Transaction can use reserve block pool */ | |
120 | #define XFS_TRANS_RESERVE (1u << 4) | |
121 | /* Transaction should avoid VFS level superblock write accounting */ | |
122 | #define XFS_TRANS_NO_WRITECOUNT (1u << 5) | |
123 | /* Transaction has freed blocks returned to it's reservation */ | |
124 | #define XFS_TRANS_RES_FDBLKS (1u << 6) | |
125 | /* Transaction contains an intent done log item */ | |
126 | #define XFS_TRANS_HAS_INTENT_DONE (1u << 7) | |
127 | ||
1214f1cf BF |
128 | /* |
129 | * LOWMODE is used by the allocator to activate the lowspace algorithm - when | |
130 | * free space is running low the extent allocator may choose to allocate an | |
131 | * extent from an AG without leaving sufficient space for a btree split when | |
132 | * inserting the new extent. In this case the allocator will enable the | |
133 | * lowspace algorithm which is supposed to allow further allocations (such as | |
134 | * btree splits and newroots) to allocate from sequential AGs. In order to | |
135 | * avoid locking AGs out of order the lowspace algorithm will start searching | |
136 | * for free space from AG 0. If the correct transaction reservations have been | |
137 | * made then this algorithm will eventually find all the space it needs. | |
138 | */ | |
139 | #define XFS_TRANS_LOWMODE 0x100 /* allocate in low space mode */ | |
253f4911 | 140 | |
70a9883c DC |
141 | /* |
142 | * Field values for xfs_trans_mod_sb. | |
143 | */ | |
144 | #define XFS_TRANS_SB_ICOUNT 0x00000001 | |
145 | #define XFS_TRANS_SB_IFREE 0x00000002 | |
146 | #define XFS_TRANS_SB_FDBLOCKS 0x00000004 | |
147 | #define XFS_TRANS_SB_RES_FDBLOCKS 0x00000008 | |
148 | #define XFS_TRANS_SB_FREXTENTS 0x00000010 | |
149 | #define XFS_TRANS_SB_RES_FREXTENTS 0x00000020 | |
150 | #define XFS_TRANS_SB_DBLOCKS 0x00000040 | |
151 | #define XFS_TRANS_SB_AGCOUNT 0x00000080 | |
152 | #define XFS_TRANS_SB_IMAXPCT 0x00000100 | |
153 | #define XFS_TRANS_SB_REXTSIZE 0x00000200 | |
154 | #define XFS_TRANS_SB_RBMBLOCKS 0x00000400 | |
155 | #define XFS_TRANS_SB_RBLOCKS 0x00000800 | |
156 | #define XFS_TRANS_SB_REXTENTS 0x00001000 | |
157 | #define XFS_TRANS_SB_REXTSLOG 0x00002000 | |
158 | ||
159 | /* | |
160 | * Here we centralize the specification of XFS meta-data buffer reference count | |
161 | * values. This determines how hard the buffer cache tries to hold onto the | |
162 | * buffer. | |
163 | */ | |
164 | #define XFS_AGF_REF 4 | |
165 | #define XFS_AGI_REF 4 | |
166 | #define XFS_AGFL_REF 3 | |
167 | #define XFS_INO_BTREE_REF 3 | |
168 | #define XFS_ALLOC_BTREE_REF 2 | |
169 | #define XFS_BMAP_BTREE_REF 2 | |
035e00ac | 170 | #define XFS_RMAP_BTREE_REF 2 |
70a9883c DC |
171 | #define XFS_DIR_BTREE_REF 2 |
172 | #define XFS_INO_REF 2 | |
173 | #define XFS_ATTR_BTREE_REF 1 | |
174 | #define XFS_DQUOT_REF 1 | |
1946b91c | 175 | #define XFS_REFC_BTREE_REF 1 |
689e11c8 | 176 | #define XFS_SSB_REF 0 |
70a9883c DC |
177 | |
178 | /* | |
179 | * Flags for xfs_trans_ichgtime(). | |
180 | */ | |
181 | #define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */ | |
182 | #define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */ | |
183 | #define XFS_ICHGTIME_CREATE 0x4 /* inode create timestamp */ | |
184 | ||
5467b34b DW |
185 | /* Computed inode geometry for the filesystem. */ |
186 | struct xfs_ino_geometry { | |
187 | /* Maximum inode count in this filesystem. */ | |
188 | uint64_t maxicount; | |
189 | ||
190 | /* Actual inode cluster buffer size, in bytes. */ | |
191 | unsigned int inode_cluster_size; | |
192 | ||
193 | /* | |
194 | * Desired inode cluster buffer size, in bytes. This value is not | |
195 | * rounded up to at least one filesystem block, which is necessary for | |
196 | * the sole purpose of validating sb_spino_align. Runtime code must | |
197 | * only ever use inode_cluster_size. | |
198 | */ | |
199 | unsigned int inode_cluster_size_raw; | |
200 | ||
201 | /* Inode cluster sizes, adjusted to be at least 1 fsb. */ | |
202 | unsigned int inodes_per_cluster; | |
203 | unsigned int blocks_per_cluster; | |
204 | ||
205 | /* Inode cluster alignment. */ | |
206 | unsigned int cluster_align; | |
207 | unsigned int cluster_align_inodes; | |
208 | unsigned int inoalign_mask; /* mask sb_inoalignmt if used */ | |
209 | ||
210 | unsigned int inobt_mxr[2]; /* max inobt btree records */ | |
211 | unsigned int inobt_mnr[2]; /* min inobt btree records */ | |
212 | unsigned int inobt_maxlevels; /* max inobt btree levels. */ | |
213 | ||
214 | /* Size of inode allocations under normal operation. */ | |
215 | unsigned int ialloc_inos; | |
216 | unsigned int ialloc_blks; | |
217 | ||
218 | /* Minimum inode blocks for a sparse allocation. */ | |
219 | unsigned int ialloc_min_blks; | |
220 | ||
221 | /* stripe unit inode alignment */ | |
222 | unsigned int ialloc_align; | |
223 | ||
224 | unsigned int agino_log; /* #bits for agino in inum */ | |
f93e5436 | 225 | |
b2941046 DC |
226 | /* precomputed default inode attribute fork offset */ |
227 | unsigned int attr_fork_offset; | |
228 | ||
f93e5436 DW |
229 | /* precomputed value for di_flags2 */ |
230 | uint64_t new_diflags2; | |
b2941046 | 231 | |
5467b34b DW |
232 | }; |
233 | ||
70a9883c | 234 | #endif /* __XFS_SHARED_H__ */ |