/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (c) 2000-2006 Silicon Graphics, Inc. * All Rights Reserved. */ #ifndef __XFS_BMAP_H__ #define __XFS_BMAP_H__ struct getbmap; struct xfs_bmbt_irec; struct xfs_ifork; struct xfs_inode; struct xfs_mount; struct xfs_trans; struct xfs_alloc_arg; /* * Argument structure for xfs_bmap_alloc. */ struct xfs_bmalloca { … }; #define XFS_BMAP_MAX_NMAP … /* * Flags for xfs_bmapi_* */ #define XFS_BMAPI_ENTIRE … #define XFS_BMAPI_METADATA … #define XFS_BMAPI_ATTRFORK … #define XFS_BMAPI_PREALLOC … #define XFS_BMAPI_CONTIG … /* * unwritten extent conversion - this needs write cache flushing and no additional * allocation alignments. When specified with XFS_BMAPI_PREALLOC it converts * from written to unwritten, otherwise convert from unwritten to written. */ #define XFS_BMAPI_CONVERT … /* * allocate zeroed extents - this requires all newly allocated user data extents * to be initialised to zero. It will be ignored if XFS_BMAPI_METADATA is set. * Use in conjunction with XFS_BMAPI_CONVERT to convert unwritten extents found * during the allocation range to zeroed written extents. */ #define XFS_BMAPI_ZERO … /* * Map the inode offset to the block given in ap->firstblock. Primarily * used for reflink. The range must be in a hole, and this flag cannot be * turned on with PREALLOC or CONVERT, and cannot be used on the attr fork. * * For bunmapi, this flag unmaps the range without adjusting quota, reducing * refcount, or freeing the blocks. */ #define XFS_BMAPI_REMAP … /* Map something in the CoW fork. */ #define XFS_BMAPI_COWFORK … /* Skip online discard of freed extents */ #define XFS_BMAPI_NODISCARD … /* Do not update the rmap btree. Used for reconstructing bmbt from rmapbt. */ #define XFS_BMAPI_NORMAP … #define XFS_BMAPI_FLAGS … static inline int xfs_bmapi_aflag(int w) { … } static inline int xfs_bmapi_whichfork(uint32_t bmapi_flags) { … } void xfs_bmap_alloc_account(struct xfs_bmalloca *ap); /* * Special values for xfs_bmbt_irec_t br_startblock field. */ #define DELAYSTARTBLOCK … #define HOLESTARTBLOCK … /* * Flags for xfs_bmap_add_extent*. */ #define BMAP_LEFT_CONTIG … #define BMAP_RIGHT_CONTIG … #define BMAP_LEFT_FILLING … #define BMAP_RIGHT_FILLING … #define BMAP_LEFT_DELAY … #define BMAP_RIGHT_DELAY … #define BMAP_LEFT_VALID … #define BMAP_RIGHT_VALID … #define BMAP_ATTRFORK … #define BMAP_COWFORK … #define XFS_BMAP_EXT_FLAGS … /* Return true if the extent is an allocated extent, written or not. */ static inline bool xfs_bmap_is_real_extent(const struct xfs_bmbt_irec *irec) { … } /* * Return true if the extent is a real, allocated extent, or false if it is a * delayed allocation, and unwritten extent or a hole. */ static inline bool xfs_bmap_is_written_extent(const struct xfs_bmbt_irec *irec) { … } /* * Check the mapping for obviously garbage allocations that could trash the * filesystem immediately. */ #define xfs_valid_startblock(ip, startblock) … int xfs_bmap_longest_free_extent(struct xfs_perag *pag, struct xfs_trans *tp, xfs_extlen_t *blen); void xfs_trim_extent(struct xfs_bmbt_irec *irec, xfs_fileoff_t bno, xfs_filblks_t len); unsigned int xfs_bmap_compute_attr_offset(struct xfs_mount *mp); int xfs_bmap_add_attrfork(struct xfs_trans *tp, struct xfs_inode *ip, int size, int rsvd); void xfs_bmap_local_to_extents_empty(struct xfs_trans *tp, struct xfs_inode *ip, int whichfork); int xfs_bmap_local_to_extents(struct xfs_trans *tp, struct xfs_inode *ip, xfs_extlen_t total, int *logflagsp, int whichfork, void (*init_fn)(struct xfs_trans *tp, struct xfs_buf *bp, struct xfs_inode *ip, struct xfs_ifork *ifp, void *priv), void *priv); void xfs_bmap_compute_maxlevels(struct xfs_mount *mp, int whichfork); int xfs_bmap_first_unused(struct xfs_trans *tp, struct xfs_inode *ip, xfs_extlen_t len, xfs_fileoff_t *unused, int whichfork); int xfs_bmap_last_before(struct xfs_trans *tp, struct xfs_inode *ip, xfs_fileoff_t *last_block, int whichfork); int xfs_bmap_last_offset(struct xfs_inode *ip, xfs_fileoff_t *unused, int whichfork); int xfs_bmapi_read(struct xfs_inode *ip, xfs_fileoff_t bno, xfs_filblks_t len, struct xfs_bmbt_irec *mval, int *nmap, uint32_t flags); int xfs_bmapi_write(struct xfs_trans *tp, struct xfs_inode *ip, xfs_fileoff_t bno, xfs_filblks_t len, uint32_t flags, xfs_extlen_t total, struct xfs_bmbt_irec *mval, int *nmap); int xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip, xfs_fileoff_t bno, xfs_filblks_t len, uint32_t flags, xfs_extnum_t nexts, int *done); void xfs_bmap_del_extent_delay(struct xfs_inode *ip, int whichfork, struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *got, struct xfs_bmbt_irec *del); void xfs_bmap_del_extent_cow(struct xfs_inode *ip, struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *got, struct xfs_bmbt_irec *del); uint xfs_default_attroffset(struct xfs_inode *ip); int xfs_bmap_collapse_extents(struct xfs_trans *tp, struct xfs_inode *ip, xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb, bool *done); int xfs_bmap_can_insert_extents(struct xfs_inode *ip, xfs_fileoff_t off, xfs_fileoff_t shift); int xfs_bmap_insert_extents(struct xfs_trans *tp, struct xfs_inode *ip, xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb, bool *done, xfs_fileoff_t stop_fsb); int xfs_bmap_split_extent(struct xfs_trans *tp, struct xfs_inode *ip, xfs_fileoff_t split_offset); int xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, int whichfork, xfs_fileoff_t off, xfs_filblks_t len, xfs_filblks_t prealloc, struct xfs_bmbt_irec *got, struct xfs_iext_cursor *cur, int eof); int xfs_bmapi_convert_delalloc(struct xfs_inode *ip, int whichfork, xfs_off_t offset, struct iomap *iomap, unsigned int *seq); int xfs_bmap_add_extent_unwritten_real(struct xfs_trans *tp, struct xfs_inode *ip, int whichfork, struct xfs_iext_cursor *icur, struct xfs_btree_cur **curp, struct xfs_bmbt_irec *new, int *logflagsp); xfs_extlen_t xfs_bmapi_minleft(struct xfs_trans *tp, struct xfs_inode *ip, int fork); int xfs_bmap_btalloc_low_space(struct xfs_bmalloca *ap, struct xfs_alloc_arg *args); enum xfs_bmap_intent_type { … }; #define XFS_BMAP_INTENT_STRINGS … struct xfs_bmap_intent { … }; int xfs_bmap_finish_one(struct xfs_trans *tp, struct xfs_bmap_intent *bi); void xfs_bmap_map_extent(struct xfs_trans *tp, struct xfs_inode *ip, int whichfork, struct xfs_bmbt_irec *imap); void xfs_bmap_unmap_extent(struct xfs_trans *tp, struct xfs_inode *ip, int whichfork, struct xfs_bmbt_irec *imap); static inline uint32_t xfs_bmap_fork_to_state(int whichfork) { … } xfs_failaddr_t xfs_bmap_validate_extent_raw(struct xfs_mount *mp, bool rtfile, int whichfork, struct xfs_bmbt_irec *irec); xfs_failaddr_t xfs_bmap_validate_extent(struct xfs_inode *ip, int whichfork, struct xfs_bmbt_irec *irec); int xfs_bmap_complain_bad_rec(struct xfs_inode *ip, int whichfork, xfs_failaddr_t fa, const struct xfs_bmbt_irec *irec); int xfs_bmapi_remap(struct xfs_trans *tp, struct xfs_inode *ip, xfs_fileoff_t bno, xfs_filblks_t len, xfs_fsblock_t startblock, uint32_t flags); int xfs_bunmapi_range(struct xfs_trans **tpp, struct xfs_inode *ip, uint32_t flags, xfs_fileoff_t startoff, xfs_fileoff_t endoff); extern struct kmem_cache *xfs_bmap_intent_cache; int __init xfs_bmap_intent_init_cache(void); void xfs_bmap_intent_destroy_cache(void); xfs_bmap_query_range_fn; int xfs_bmap_query_all(struct xfs_btree_cur *cur, xfs_bmap_query_range_fn fn, void *priv); xfs_extlen_t xfs_get_extsz_hint(struct xfs_inode *ip); xfs_extlen_t xfs_get_cowextsz_hint(struct xfs_inode *ip); #endif /* __XFS_BMAP_H__ */
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