1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * Copyright (c) 2013 Red Hat, Inc.
7 #ifndef __XFS_SHARED_H__
8 #define __XFS_SHARED_H__
11 * Definitions shared between kernel and userspace that don't fit into any other
12 * header file that is shared with userspace.
22 * Buffer verifier operations are widely used, including userspace tools
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;
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;
56 static inline bool xfs_btree_is_bno(const struct xfs_btree_ops *ops)
58 return ops == &xfs_bnobt_ops;
61 static inline bool xfs_btree_is_cnt(const struct xfs_btree_ops *ops)
63 return ops == &xfs_cntbt_ops;
66 static inline bool xfs_btree_is_bmap(const struct xfs_btree_ops *ops)
68 return ops == &xfs_bmbt_ops;
71 static inline bool xfs_btree_is_ino(const struct xfs_btree_ops *ops)
73 return ops == &xfs_inobt_ops;
76 static inline bool xfs_btree_is_fino(const struct xfs_btree_ops *ops)
78 return ops == &xfs_finobt_ops;
81 static inline bool xfs_btree_is_refcount(const struct xfs_btree_ops *ops)
83 return ops == &xfs_refcountbt_ops;
86 static inline bool xfs_btree_is_rmap(const struct xfs_btree_ops *ops)
88 return ops == &xfs_rmapbt_ops;
91 #ifdef CONFIG_XFS_BTREE_IN_MEM
92 static inline bool xfs_btree_is_mem_rmap(const struct xfs_btree_ops *ops)
94 return ops == &xfs_rmapbt_mem_ops;
97 # define xfs_btree_is_mem_rmap(...) (false)
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 *);
104 struct xfs_trans_res;
105 void xfs_log_get_max_trans_res(struct xfs_mount *mp,
106 struct xfs_trans_res *max_resp);
109 * Values for t_flags.
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)
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.
139 #define XFS_TRANS_LOWMODE 0x100 /* allocate in low space mode */
142 * Field values for xfs_trans_mod_sb.
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
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
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
179 * Flags for xfs_trans_ichgtime().
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 */
185 /* Computed inode geometry for the filesystem. */
186 struct xfs_ino_geometry {
187 /* Maximum inode count in this filesystem. */
190 /* Actual inode cluster buffer size, in bytes. */
191 unsigned int inode_cluster_size;
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.
199 unsigned int inode_cluster_size_raw;
201 /* Inode cluster sizes, adjusted to be at least 1 fsb. */
202 unsigned int inodes_per_cluster;
203 unsigned int blocks_per_cluster;
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 */
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. */
214 /* Size of inode allocations under normal operation. */
215 unsigned int ialloc_inos;
216 unsigned int ialloc_blks;
218 /* Minimum inode blocks for a sparse allocation. */
219 unsigned int ialloc_min_blks;
221 /* stripe unit inode alignment */
222 unsigned int ialloc_align;
224 unsigned int agino_log; /* #bits for agino in inum */
226 /* precomputed default inode attribute fork offset */
227 unsigned int attr_fork_offset;
229 /* precomputed value for di_flags2 */
230 uint64_t new_diflags2;
234 #endif /* __XFS_SHARED_H__ */