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 */ 14struct xfs_ifork; 15struct xfs_buf; 16struct xfs_buf_ops; 17struct xfs_mount; 18struct xfs_trans; 19struct xfs_inode; 20 21/* 22 * Buffer verifier operations are widely used, including userspace tools 23 */ 24extern const struct xfs_buf_ops xfs_agf_buf_ops; 25extern const struct xfs_buf_ops xfs_agfl_buf_ops; 26extern const struct xfs_buf_ops xfs_agi_buf_ops; 27extern const struct xfs_buf_ops xfs_attr3_leaf_buf_ops; 28extern const struct xfs_buf_ops xfs_attr3_rmt_buf_ops; 29extern const struct xfs_buf_ops xfs_bmbt_buf_ops; 30extern const struct xfs_buf_ops xfs_bnobt_buf_ops; 31extern const struct xfs_buf_ops xfs_cntbt_buf_ops; 32extern const struct xfs_buf_ops xfs_da3_node_buf_ops; 33extern const struct xfs_buf_ops xfs_dquot_buf_ops; 34extern const struct xfs_buf_ops xfs_dquot_buf_ra_ops; 35extern const struct xfs_buf_ops xfs_finobt_buf_ops; 36extern const struct xfs_buf_ops xfs_inobt_buf_ops; 37extern const struct xfs_buf_ops xfs_inode_buf_ops; 38extern const struct xfs_buf_ops xfs_inode_buf_ra_ops; 39extern const struct xfs_buf_ops xfs_refcountbt_buf_ops; 40extern const struct xfs_buf_ops xfs_rmapbt_buf_ops; 41extern const struct xfs_buf_ops xfs_rtbuf_ops; 42extern const struct xfs_buf_ops xfs_sb_buf_ops; 43extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops; 44extern const struct xfs_buf_ops xfs_symlink_buf_ops; 45 46/* btree ops */ 47extern const struct xfs_btree_ops xfs_bnobt_ops; 48extern const struct xfs_btree_ops xfs_cntbt_ops; 49extern const struct xfs_btree_ops xfs_inobt_ops; 50extern const struct xfs_btree_ops xfs_finobt_ops; 51extern const struct xfs_btree_ops xfs_bmbt_ops; 52extern const struct xfs_btree_ops xfs_refcountbt_ops; 53extern const struct xfs_btree_ops xfs_rmapbt_ops; 54extern const struct xfs_btree_ops xfs_rmapbt_mem_ops; 55 56static inline bool xfs_btree_is_bno(const struct xfs_btree_ops *ops) 57{ 58 return ops == &xfs_bnobt_ops; 59} 60 61static inline bool xfs_btree_is_cnt(const struct xfs_btree_ops *ops) 62{ 63 return ops == &xfs_cntbt_ops; 64} 65 66static inline bool xfs_btree_is_bmap(const struct xfs_btree_ops *ops) 67{ 68 return ops == &xfs_bmbt_ops; 69} 70 71static inline bool xfs_btree_is_ino(const struct xfs_btree_ops *ops) 72{ 73 return ops == &xfs_inobt_ops; 74} 75 76static inline bool xfs_btree_is_fino(const struct xfs_btree_ops *ops) 77{ 78 return ops == &xfs_finobt_ops; 79} 80 81static inline bool xfs_btree_is_refcount(const struct xfs_btree_ops *ops) 82{ 83 return ops == &xfs_refcountbt_ops; 84} 85 86static 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 92static 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 */ 101int xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes); 102int xfs_log_calc_minimum_size(struct xfs_mount *); 103 104struct xfs_trans_res; 105void 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. */ 186struct 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