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_rtbitmap_buf_ops; 42 extern const struct xfs_buf_ops xfs_rtsummary_buf_ops; 43 extern const struct xfs_buf_ops xfs_rtbuf_ops; 44 extern const struct xfs_buf_ops xfs_rtsb_buf_ops; 45 extern const struct xfs_buf_ops xfs_sb_buf_ops; 46 extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops; 47 extern const struct xfs_buf_ops xfs_symlink_buf_ops; 48 49 /* btree ops */ 50 extern const struct xfs_btree_ops xfs_bnobt_ops; 51 extern const struct xfs_btree_ops xfs_cntbt_ops; 52 extern const struct xfs_btree_ops xfs_inobt_ops; 53 extern const struct xfs_btree_ops xfs_finobt_ops; 54 extern const struct xfs_btree_ops xfs_bmbt_ops; 55 extern const struct xfs_btree_ops xfs_refcountbt_ops; 56 extern const struct xfs_btree_ops xfs_rmapbt_ops; 57 extern const struct xfs_btree_ops xfs_rmapbt_mem_ops; 58 xfs_btree_is_bno(const struct xfs_btree_ops * ops)59static inline bool xfs_btree_is_bno(const struct xfs_btree_ops *ops) 60 { 61 return ops == &xfs_bnobt_ops; 62 } 63 xfs_btree_is_cnt(const struct xfs_btree_ops * ops)64static inline bool xfs_btree_is_cnt(const struct xfs_btree_ops *ops) 65 { 66 return ops == &xfs_cntbt_ops; 67 } 68 xfs_btree_is_bmap(const struct xfs_btree_ops * ops)69static inline bool xfs_btree_is_bmap(const struct xfs_btree_ops *ops) 70 { 71 return ops == &xfs_bmbt_ops; 72 } 73 xfs_btree_is_ino(const struct xfs_btree_ops * ops)74static inline bool xfs_btree_is_ino(const struct xfs_btree_ops *ops) 75 { 76 return ops == &xfs_inobt_ops; 77 } 78 xfs_btree_is_fino(const struct xfs_btree_ops * ops)79static inline bool xfs_btree_is_fino(const struct xfs_btree_ops *ops) 80 { 81 return ops == &xfs_finobt_ops; 82 } 83 xfs_btree_is_refcount(const struct xfs_btree_ops * ops)84static inline bool xfs_btree_is_refcount(const struct xfs_btree_ops *ops) 85 { 86 return ops == &xfs_refcountbt_ops; 87 } 88 xfs_btree_is_rmap(const struct xfs_btree_ops * ops)89static inline bool xfs_btree_is_rmap(const struct xfs_btree_ops *ops) 90 { 91 return ops == &xfs_rmapbt_ops; 92 } 93 94 #ifdef CONFIG_XFS_BTREE_IN_MEM xfs_btree_is_mem_rmap(const struct xfs_btree_ops * ops)95static inline bool xfs_btree_is_mem_rmap(const struct xfs_btree_ops *ops) 96 { 97 return ops == &xfs_rmapbt_mem_ops; 98 } 99 #else 100 # define xfs_btree_is_mem_rmap(...) (false) 101 #endif 102 103 /* log size calculation functions */ 104 int xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes); 105 int xfs_log_calc_minimum_size(struct xfs_mount *); 106 107 struct xfs_trans_res; 108 void xfs_log_get_max_trans_res(struct xfs_mount *mp, 109 struct xfs_trans_res *max_resp); 110 111 /* 112 * Values for t_flags. 113 */ 114 /* Transaction needs to be logged */ 115 #define XFS_TRANS_DIRTY (1u << 0) 116 /* Superblock is dirty and needs to be logged */ 117 #define XFS_TRANS_SB_DIRTY (1u << 1) 118 /* Transaction took a permanent log reservation */ 119 #define XFS_TRANS_PERM_LOG_RES (1u << 2) 120 /* Synchronous transaction commit needed */ 121 #define XFS_TRANS_SYNC (1u << 3) 122 /* Transaction can use reserve block pool */ 123 #define XFS_TRANS_RESERVE (1u << 4) 124 /* Transaction should avoid VFS level superblock write accounting */ 125 #define XFS_TRANS_NO_WRITECOUNT (1u << 5) 126 /* Transaction has freed blocks returned to it's reservation */ 127 #define XFS_TRANS_RES_FDBLKS (1u << 6) 128 /* Transaction contains an intent done log item */ 129 #define XFS_TRANS_HAS_INTENT_DONE (1u << 7) 130 /* 131 * LOWMODE is used by the allocator to activate the lowspace algorithm - when 132 * free space is running low the extent allocator may choose to allocate an 133 * extent from an AG without leaving sufficient space for a btree split when 134 * inserting the new extent. In this case the allocator will enable the 135 * lowspace algorithm which is supposed to allow further allocations (such as 136 * btree splits and newroots) to allocate from sequential AGs. In order to 137 * avoid locking AGs out of order the lowspace algorithm will start searching 138 * for free space from AG 0. If the correct transaction reservations have been 139 * made then this algorithm will eventually find all the space it needs. 140 */ 141 #define XFS_TRANS_LOWMODE (1u << 8) 142 143 /* Transaction has locked the rtbitmap and rtsum inodes */ 144 #define XFS_TRANS_RTBITMAP_LOCKED (1u << 9) 145 146 /* 147 * Field values for xfs_trans_mod_sb. 148 */ 149 #define XFS_TRANS_SB_ICOUNT 0x00000001 150 #define XFS_TRANS_SB_IFREE 0x00000002 151 #define XFS_TRANS_SB_FDBLOCKS 0x00000004 152 #define XFS_TRANS_SB_RES_FDBLOCKS 0x00000008 153 #define XFS_TRANS_SB_FREXTENTS 0x00000010 154 #define XFS_TRANS_SB_RES_FREXTENTS 0x00000020 155 #define XFS_TRANS_SB_DBLOCKS 0x00000040 156 #define XFS_TRANS_SB_AGCOUNT 0x00000080 157 #define XFS_TRANS_SB_IMAXPCT 0x00000100 158 #define XFS_TRANS_SB_REXTSIZE 0x00000200 159 #define XFS_TRANS_SB_RBMBLOCKS 0x00000400 160 #define XFS_TRANS_SB_RBLOCKS 0x00000800 161 #define XFS_TRANS_SB_REXTENTS 0x00001000 162 #define XFS_TRANS_SB_REXTSLOG 0x00002000 163 #define XFS_TRANS_SB_RGCOUNT 0x00004000 164 165 /* 166 * Here we centralize the specification of XFS meta-data buffer reference count 167 * values. This determines how hard the buffer cache tries to hold onto the 168 * buffer. 169 */ 170 #define XFS_AGF_REF 4 171 #define XFS_AGI_REF 4 172 #define XFS_AGFL_REF 3 173 #define XFS_INO_BTREE_REF 3 174 #define XFS_ALLOC_BTREE_REF 2 175 #define XFS_BMAP_BTREE_REF 2 176 #define XFS_RMAP_BTREE_REF 2 177 #define XFS_DIR_BTREE_REF 2 178 #define XFS_INO_REF 2 179 #define XFS_ATTR_BTREE_REF 1 180 #define XFS_DQUOT_REF 1 181 #define XFS_REFC_BTREE_REF 1 182 #define XFS_SSB_REF 0 183 184 /* Computed inode geometry for the filesystem. */ 185 struct xfs_ino_geometry { 186 /* Maximum inode count in this filesystem. */ 187 uint64_t maxicount; 188 189 /* Actual inode cluster buffer size, in bytes. */ 190 unsigned int inode_cluster_size; 191 192 /* 193 * Desired inode cluster buffer size, in bytes. This value is not 194 * rounded up to at least one filesystem block, which is necessary for 195 * the sole purpose of validating sb_spino_align. Runtime code must 196 * only ever use inode_cluster_size. 197 */ 198 unsigned int inode_cluster_size_raw; 199 200 /* Inode cluster sizes, adjusted to be at least 1 fsb. */ 201 unsigned int inodes_per_cluster; 202 unsigned int blocks_per_cluster; 203 204 /* Inode cluster alignment. */ 205 unsigned int cluster_align; 206 unsigned int cluster_align_inodes; 207 unsigned int inoalign_mask; /* mask sb_inoalignmt if used */ 208 209 unsigned int inobt_mxr[2]; /* max inobt btree records */ 210 unsigned int inobt_mnr[2]; /* min inobt btree records */ 211 unsigned int inobt_maxlevels; /* max inobt btree levels. */ 212 213 /* Size of inode allocations under normal operation. */ 214 unsigned int ialloc_inos; 215 unsigned int ialloc_blks; 216 217 /* Minimum inode blocks for a sparse allocation. */ 218 unsigned int ialloc_min_blks; 219 220 /* stripe unit inode alignment */ 221 unsigned int ialloc_align; 222 223 unsigned int agino_log; /* #bits for agino in inum */ 224 225 /* precomputed default inode attribute fork offset */ 226 unsigned int attr_fork_offset; 227 228 /* precomputed value for di_flags2 */ 229 uint64_t new_diflags2; 230 231 /* minimum folio order of a page cache allocation */ 232 unsigned int min_folio_order; 233 234 }; 235 236 #endif /* __XFS_SHARED_H__ */ 237