| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| * All Rights Reserved. |
| */ |
| |
| #ifndef __XFS_MOUNT_H__ |
| #define __XFS_MOUNT_H__ |
| |
| struct xfs_inode; |
| struct xfs_buftarg; |
| struct xfs_da_geometry; |
| |
| typedef void (*buf_writeback_fn)(struct xfs_buf *bp); |
| |
| /* |
| * Define a user-level mount structure with all we need |
| * in order to make use of the numerous XFS_* macros. |
| */ |
| typedef struct xfs_mount { |
| xfs_sb_t m_sb; /* copy of fs superblock */ |
| #define m_icount m_sb.sb_icount |
| #define m_ifree m_sb.sb_ifree |
| #define m_fdblocks m_sb.sb_fdblocks |
| spinlock_t m_sb_lock; |
| |
| /* |
| * Bitsets of per-fs metadata that have been checked and/or are sick. |
| * Callers must hold m_sb_lock to access these two fields. |
| */ |
| uint8_t m_fs_checked; |
| uint8_t m_fs_sick; |
| |
| char *m_fsname; /* filesystem name */ |
| int m_bsize; /* fs logical block size */ |
| spinlock_t m_agirotor_lock; |
| xfs_agnumber_t m_agfrotor; /* last ag where space found */ |
| xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ |
| xfs_agnumber_t m_maxagi; /* highest inode alloc group */ |
| struct xfs_ino_geometry m_ino_geo; /* inode geometry */ |
| uint m_rsumlevels; /* rt summary levels */ |
| uint m_rsumsize; /* size of rt summary, bytes */ |
| /* |
| * Optional cache of rt summary level per bitmap block with the |
| * invariant that m_rsum_cache[bbno] <= the minimum i for which |
| * rsum[i][bbno] != 0. Reads and writes are serialized by the rsumip |
| * inode lock. |
| */ |
| uint8_t *m_rsum_cache; |
| struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ |
| struct xfs_inode *m_rsumip; /* pointer to summary inode */ |
| struct xfs_buftarg *m_ddev_targp; |
| struct xfs_buftarg *m_logdev_targp; |
| struct xfs_buftarg *m_rtdev_targp; |
| #define m_dev m_ddev_targp |
| #define m_logdev m_logdev_targp |
| #define m_rtdev m_rtdev_targp |
| uint8_t m_dircook_elog; /* log d-cookie entry bits */ |
| uint8_t m_blkbit_log; /* blocklog + NBBY */ |
| uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ |
| uint8_t m_sectbb_log; /* sectorlog - BBSHIFT */ |
| uint8_t m_agno_log; /* log #ag's */ |
| uint m_blockmask; /* sb_blocksize-1 */ |
| uint m_blockwsize; /* sb_blocksize in words */ |
| uint m_blockwmask; /* blockwsize-1 */ |
| uint m_alloc_mxr[2]; /* XFS_ALLOC_BLOCK_MAXRECS */ |
| uint m_alloc_mnr[2]; /* XFS_ALLOC_BLOCK_MINRECS */ |
| uint m_bmap_dmxr[2]; /* XFS_BMAP_BLOCK_DMAXRECS */ |
| uint m_bmap_dmnr[2]; /* XFS_BMAP_BLOCK_DMINRECS */ |
| uint m_rmap_mxr[2]; /* max rmap btree records */ |
| uint m_rmap_mnr[2]; /* min rmap btree records */ |
| uint m_refc_mxr[2]; /* max refc btree records */ |
| uint m_refc_mnr[2]; /* min refc btree records */ |
| uint m_alloc_maxlevels; /* max alloc btree levels */ |
| uint m_bm_maxlevels[2]; /* max bmap btree levels */ |
| uint m_rmap_maxlevels; /* max rmap btree levels */ |
| uint m_refc_maxlevels; /* max refc btree levels */ |
| unsigned int m_agbtree_maxlevels; /* max level of all AG btrees */ |
| xfs_extlen_t m_ag_prealloc_blocks; /* reserved ag blocks */ |
| uint m_alloc_set_aside; /* space we can't use */ |
| uint m_ag_max_usable; /* max space per AG */ |
| struct radix_tree_root m_perag_tree; |
| uint64_t m_features; /* active filesystem features */ |
| unsigned long m_opstate; /* dynamic state flags */ |
| bool m_finobt_nores; /* no per-AG finobt resv. */ |
| uint m_qflags; /* quota status flags */ |
| uint m_attroffset; /* inode attribute offset */ |
| struct xfs_trans_resv m_resv; /* precomputed res values */ |
| int m_dalign; /* stripe unit */ |
| int m_swidth; /* stripe width */ |
| const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ |
| |
| struct xfs_da_geometry *m_dir_geo; /* directory block geometry */ |
| struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */ |
| |
| /* |
| * anonymous struct to allow xfs_dquot_buf.c to compile. |
| * Pointer is always null in userspace, so code does not use it at all |
| */ |
| struct { |
| int qi_dqperchunk; |
| } *m_quotainfo; |
| |
| buf_writeback_fn m_buf_writeback_fn; |
| |
| /* |
| * xlog is defined in libxlog and thus is not intialized by libxfs. This |
| * allows an application to initialize and store a reference to the log |
| * if warranted. |
| */ |
| struct xlog *m_log; /* log specific stuff */ |
| |
| /* |
| * Global count of allocation btree blocks in use across all AGs. Only |
| * used when perag reservation is enabled. Helps prevent block |
| * reservation from attempting to reserve allocation btree blocks. |
| */ |
| atomic64_t m_allocbt_blks; |
| spinlock_t m_perag_lock; /* lock for m_perag_tree */ |
| |
| } xfs_mount_t; |
| |
| #define M_IGEO(mp) (&(mp)->m_ino_geo) |
| |
| /* |
| * Flags for m_features. |
| * |
| * These are all the active features in the filesystem, regardless of how |
| * they are configured. |
| */ |
| #define XFS_FEAT_ATTR (1ULL << 0) /* xattrs present in fs */ |
| #define XFS_FEAT_NLINK (1ULL << 1) /* 32 bit link counts */ |
| #define XFS_FEAT_QUOTA (1ULL << 2) /* quota active */ |
| #define XFS_FEAT_ALIGN (1ULL << 3) /* inode alignment */ |
| #define XFS_FEAT_DALIGN (1ULL << 4) /* data alignment */ |
| #define XFS_FEAT_LOGV2 (1ULL << 5) /* version 2 logs */ |
| #define XFS_FEAT_SECTOR (1ULL << 6) /* sector size > 512 bytes */ |
| #define XFS_FEAT_EXTFLG (1ULL << 7) /* unwritten extents */ |
| #define XFS_FEAT_ASCIICI (1ULL << 8) /* ASCII only case-insens. */ |
| #define XFS_FEAT_LAZYSBCOUNT (1ULL << 9) /* Superblk counters */ |
| #define XFS_FEAT_ATTR2 (1ULL << 10) /* dynamic attr fork */ |
| #define XFS_FEAT_PARENT (1ULL << 11) /* parent pointers */ |
| #define XFS_FEAT_PROJID32 (1ULL << 12) /* 32 bit project id */ |
| #define XFS_FEAT_CRC (1ULL << 13) /* metadata CRCs */ |
| #define XFS_FEAT_V3INODES (1ULL << 14) /* Version 3 inodes */ |
| #define XFS_FEAT_PQUOTINO (1ULL << 15) /* non-shared proj/grp quotas */ |
| #define XFS_FEAT_FTYPE (1ULL << 16) /* inode type in dir */ |
| #define XFS_FEAT_FINOBT (1ULL << 17) /* free inode btree */ |
| #define XFS_FEAT_RMAPBT (1ULL << 18) /* reverse map btree */ |
| #define XFS_FEAT_REFLINK (1ULL << 19) /* reflinked files */ |
| #define XFS_FEAT_SPINODES (1ULL << 20) /* sparse inode chunks */ |
| #define XFS_FEAT_META_UUID (1ULL << 21) /* metadata UUID */ |
| #define XFS_FEAT_REALTIME (1ULL << 22) /* realtime device present */ |
| #define XFS_FEAT_INOBTCNT (1ULL << 23) /* inobt block counts */ |
| #define XFS_FEAT_BIGTIME (1ULL << 24) /* large timestamps */ |
| #define XFS_FEAT_NEEDSREPAIR (1ULL << 25) /* needs xfs_repair */ |
| #define XFS_FEAT_NREXT64 (1ULL << 26) /* large extent counters */ |
| |
| #define __XFS_HAS_FEAT(name, NAME) \ |
| static inline bool xfs_has_ ## name (struct xfs_mount *mp) \ |
| { \ |
| return mp->m_features & XFS_FEAT_ ## NAME; \ |
| } |
| |
| /* Some features can be added dynamically so they need a set wrapper, too. */ |
| #define __XFS_ADD_FEAT(name, NAME) \ |
| __XFS_HAS_FEAT(name, NAME); \ |
| static inline void xfs_add_ ## name (struct xfs_mount *mp) \ |
| { \ |
| mp->m_features |= XFS_FEAT_ ## NAME; \ |
| xfs_sb_version_add ## name(&mp->m_sb); \ |
| } |
| |
| /* Superblock features */ |
| __XFS_ADD_FEAT(attr, ATTR) |
| __XFS_HAS_FEAT(nlink, NLINK) |
| __XFS_ADD_FEAT(quota, QUOTA) |
| __XFS_HAS_FEAT(align, ALIGN) |
| __XFS_HAS_FEAT(dalign, DALIGN) |
| __XFS_HAS_FEAT(logv2, LOGV2) |
| __XFS_HAS_FEAT(sector, SECTOR) |
| __XFS_HAS_FEAT(extflg, EXTFLG) |
| __XFS_HAS_FEAT(asciici, ASCIICI) |
| __XFS_HAS_FEAT(lazysbcount, LAZYSBCOUNT) |
| __XFS_ADD_FEAT(attr2, ATTR2) |
| __XFS_HAS_FEAT(parent, PARENT) |
| __XFS_ADD_FEAT(projid32, PROJID32) |
| __XFS_HAS_FEAT(crc, CRC) |
| __XFS_HAS_FEAT(v3inodes, V3INODES) |
| __XFS_HAS_FEAT(pquotino, PQUOTINO) |
| __XFS_HAS_FEAT(ftype, FTYPE) |
| __XFS_HAS_FEAT(finobt, FINOBT) |
| __XFS_HAS_FEAT(rmapbt, RMAPBT) |
| __XFS_HAS_FEAT(reflink, REFLINK) |
| __XFS_HAS_FEAT(sparseinodes, SPINODES) |
| __XFS_HAS_FEAT(metauuid, META_UUID) |
| __XFS_HAS_FEAT(realtime, REALTIME) |
| __XFS_HAS_FEAT(inobtcounts, INOBTCNT) |
| __XFS_HAS_FEAT(bigtime, BIGTIME) |
| __XFS_HAS_FEAT(needsrepair, NEEDSREPAIR) |
| __XFS_HAS_FEAT(large_extent_counts, NREXT64) |
| |
| /* Kernel mount features that we don't support */ |
| #define __XFS_UNSUPP_FEAT(name) \ |
| static inline bool xfs_has_ ## name (struct xfs_mount *mp) \ |
| { \ |
| return false; \ |
| } |
| __XFS_UNSUPP_FEAT(wsync) |
| __XFS_UNSUPP_FEAT(noattr2) |
| __XFS_UNSUPP_FEAT(ikeep) |
| __XFS_UNSUPP_FEAT(swalloc) |
| __XFS_UNSUPP_FEAT(small_inums) |
| __XFS_UNSUPP_FEAT(readonly) |
| |
| /* Operational mount state flags */ |
| #define XFS_OPSTATE_INODE32 0 /* inode32 allocator active */ |
| #define XFS_OPSTATE_DEBUGGER 1 /* is this the debugger? */ |
| #define XFS_OPSTATE_REPORT_CORRUPTION 2 /* report buffer corruption? */ |
| #define XFS_OPSTATE_PERAG_DATA_LOADED 3 /* per-AG data initialized? */ |
| |
| #define __XFS_IS_OPSTATE(name, NAME) \ |
| static inline bool xfs_is_ ## name (struct xfs_mount *mp) \ |
| { \ |
| return (mp)->m_opstate & (1UL << XFS_OPSTATE_ ## NAME); \ |
| } \ |
| static inline bool xfs_clear_ ## name (struct xfs_mount *mp) \ |
| { \ |
| bool ret = xfs_is_ ## name(mp); \ |
| \ |
| (mp)->m_opstate &= ~(1UL << XFS_OPSTATE_ ## NAME); \ |
| return ret; \ |
| } \ |
| static inline bool xfs_set_ ## name (struct xfs_mount *mp) \ |
| { \ |
| bool ret = xfs_is_ ## name(mp); \ |
| \ |
| (mp)->m_opstate |= (1UL << XFS_OPSTATE_ ## NAME); \ |
| return ret; \ |
| } |
| |
| __XFS_IS_OPSTATE(inode32, INODE32) |
| __XFS_IS_OPSTATE(debugger, DEBUGGER) |
| __XFS_IS_OPSTATE(reporting_corruption, REPORT_CORRUPTION) |
| __XFS_IS_OPSTATE(perag_data_loaded, PERAG_DATA_LOADED) |
| |
| #define __XFS_UNSUPP_OPSTATE(name) \ |
| static inline bool xfs_is_ ## name (struct xfs_mount *mp) \ |
| { \ |
| return false; \ |
| } |
| __XFS_UNSUPP_OPSTATE(readonly) |
| __XFS_UNSUPP_OPSTATE(shutdown) |
| |
| /* don't fail on device size or AG count checks */ |
| #define LIBXFS_MOUNT_DEBUGGER (1U << 0) |
| /* report metadata corruption to stdout */ |
| #define LIBXFS_MOUNT_REPORT_CORRUPTION (1U << 1) |
| |
| #define LIBXFS_BHASHSIZE(sbp) (1<<10) |
| |
| void libxfs_compute_all_maxlevels(struct xfs_mount *mp); |
| struct xfs_mount *libxfs_mount(struct xfs_mount *mp, struct xfs_sb *sb, |
| dev_t dev, dev_t logdev, dev_t rtdev, unsigned int flags); |
| int libxfs_flush_mount(struct xfs_mount *mp); |
| int libxfs_umount(struct xfs_mount *mp); |
| extern void libxfs_rtmount_destroy (xfs_mount_t *); |
| |
| /* Dummy xfs_dquot so that libxfs compiles. */ |
| struct xfs_dquot { |
| int q_type; |
| }; |
| |
| #endif /* __XFS_MOUNT_H__ */ |