1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
4 | * Copyright (c) 2013 Red Hat, Inc. |
5 | * All Rights Reserved. |
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; |
25 | extern const struct xfs_buf_ops xfs_agfl_buf_ops; |
26 | extern const struct xfs_buf_ops xfs_agi_buf_ops; |
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; |
30 | extern const struct xfs_buf_ops xfs_bnobt_buf_ops; |
31 | extern const struct xfs_buf_ops xfs_cntbt_buf_ops; |
32 | extern const struct xfs_buf_ops xfs_da3_node_buf_ops; |
33 | extern const struct xfs_buf_ops xfs_dquot_buf_ops; |
34 | extern const struct xfs_buf_ops xfs_dquot_buf_ra_ops; |
35 | extern const struct xfs_buf_ops xfs_finobt_buf_ops; |
36 | extern const struct xfs_buf_ops xfs_inobt_buf_ops; |
37 | extern const struct xfs_buf_ops xfs_inode_buf_ops; |
38 | extern const struct xfs_buf_ops xfs_inode_buf_ra_ops; |
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; |
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 | |
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; |
54 | extern const struct xfs_btree_ops xfs_rmapbt_mem_ops; |
55 | |
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 | |
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 | |
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 | |
104 | struct xfs_trans_res; |
105 | void xfs_log_get_max_trans_res(struct xfs_mount *mp, |
106 | struct xfs_trans_res *max_resp); |
107 | |
108 | /* |
109 | * Values for t_flags. |
110 | */ |
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 | |
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 */ |
140 | |
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 |
170 | #define XFS_RMAP_BTREE_REF 2 |
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 |
175 | #define XFS_REFC_BTREE_REF 1 |
176 | #define XFS_SSB_REF 0 |
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 | |
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 */ |
225 | |
226 | /* precomputed default inode attribute fork offset */ |
227 | unsigned int attr_fork_offset; |
228 | |
229 | /* precomputed value for di_flags2 */ |
230 | uint64_t new_diflags2; |
231 | |
232 | }; |
233 | |
234 | #endif /* __XFS_SHARED_H__ */ |
235 | |