| // 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_dir_ops; |
| struct xfs_da_geometry; |
| |
| /* |
| * 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 |
| |
| /* |
| * 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 */ |
| 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_ag_maxlevels; /* XFS_AG_MAXLEVELS */ |
| uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ |
| uint m_rmap_maxlevels; /* max rmap btree levels */ |
| uint m_refc_maxlevels; /* max refc btree levels */ |
| 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; |
| uint m_flags; /* global mount 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 */ |
| const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */ |
| const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */ |
| |
| /* |
| * 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; |
| |
| /* |
| * 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 */ |
| } xfs_mount_t; |
| |
| #define M_IGEO(mp) (&(mp)->m_ino_geo) |
| |
| struct xfs_ag_resv { |
| /* number of blocks originally reserved here */ |
| xfs_extlen_t ar_orig_reserved; |
| /* number of blocks reserved here */ |
| xfs_extlen_t ar_reserved; |
| /* number of blocks originally asked for */ |
| xfs_extlen_t ar_asked; |
| }; |
| |
| /* |
| * Per-ag incore structure, copies of information in agf and agi, |
| * to improve the performance of allocation group selection. |
| */ |
| typedef struct xfs_perag { |
| struct xfs_mount *pag_mount; /* owner filesystem */ |
| xfs_agnumber_t pag_agno; /* AG this structure belongs to */ |
| atomic_t pag_ref; /* perag reference count */ |
| char pagf_init; /* this agf's entry is initialized */ |
| char pagi_init; /* this agi's entry is initialized */ |
| char pagf_metadata; /* the agf is preferred to be metadata */ |
| char pagi_inodeok; /* The agi is ok for inodes */ |
| uint8_t pagf_levels[XFS_BTNUM_AGF]; |
| /* # of levels in bno & cnt btree */ |
| bool pagf_agflreset; /* agfl requires reset before use */ |
| uint32_t pagf_flcount; /* count of blocks in freelist */ |
| xfs_extlen_t pagf_freeblks; /* total free blocks */ |
| xfs_extlen_t pagf_longest; /* longest free space */ |
| uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */ |
| xfs_agino_t pagi_freecount; /* number of free inodes */ |
| xfs_agino_t pagi_count; /* number of allocated inodes */ |
| |
| /* |
| * Inode allocation search lookup optimisation. |
| * If the pagino matches, the search for new inodes |
| * doesn't need to search the near ones again straight away |
| */ |
| xfs_agino_t pagl_pagino; |
| xfs_agino_t pagl_leftrec; |
| xfs_agino_t pagl_rightrec; |
| int pagb_count; /* pagb slots in use */ |
| |
| /* Blocks reserved for all kinds of metadata. */ |
| struct xfs_ag_resv pag_meta_resv; |
| /* Blocks reserved for just AGFL-based metadata. */ |
| struct xfs_ag_resv pag_rmapbt_resv; |
| |
| /* reference count */ |
| uint8_t pagf_refcount_level; |
| } xfs_perag_t; |
| |
| static inline struct xfs_ag_resv * |
| xfs_perag_resv( |
| struct xfs_perag *pag, |
| enum xfs_ag_resv_type type) |
| { |
| switch (type) { |
| case XFS_AG_RESV_METADATA: |
| return &pag->pag_meta_resv; |
| case XFS_AG_RESV_RMAPBT: |
| return &pag->pag_rmapbt_resv; |
| default: |
| return NULL; |
| } |
| } |
| |
| #define LIBXFS_MOUNT_DEBUGGER 0x0001 |
| #define LIBXFS_MOUNT_32BITINODES 0x0002 |
| #define LIBXFS_MOUNT_32BITINOOPT 0x0004 |
| #define LIBXFS_MOUNT_COMPAT_ATTR 0x0008 |
| #define LIBXFS_MOUNT_ATTR2 0x0010 |
| #define LIBXFS_MOUNT_WANT_CORRUPTED 0x0020 |
| |
| #define LIBXFS_BHASHSIZE(sbp) (1<<10) |
| |
| extern xfs_mount_t *libxfs_mount (xfs_mount_t *, xfs_sb_t *, |
| dev_t, dev_t, dev_t, int); |
| int libxfs_umount(struct xfs_mount *mp); |
| extern void libxfs_rtmount_destroy (xfs_mount_t *); |
| |
| #endif /* __XFS_MOUNT_H__ */ |