| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. |
| * All Rights Reserved. |
| */ |
| #ifndef __XFS_ALLOC_H__ |
| #define __XFS_ALLOC_H__ |
| |
| struct xfs_buf; |
| struct xfs_btree_cur; |
| struct xfs_mount; |
| struct xfs_perag; |
| struct xfs_trans; |
| |
| extern struct workqueue_struct *xfs_alloc_wq; |
| |
| unsigned int xfs_agfl_size(struct xfs_mount *mp); |
| |
| /* |
| * Freespace allocation types. Argument to xfs_alloc_[v]extent. |
| */ |
| #define XFS_ALLOCTYPE_FIRST_AG 0x02 /* ... start at ag 0 */ |
| #define XFS_ALLOCTYPE_THIS_AG 0x08 /* anywhere in this a.g. */ |
| #define XFS_ALLOCTYPE_START_BNO 0x10 /* near this block else anywhere */ |
| #define XFS_ALLOCTYPE_NEAR_BNO 0x20 /* in this a.g. and near this block */ |
| #define XFS_ALLOCTYPE_THIS_BNO 0x40 /* at exactly this block */ |
| |
| /* this should become an enum again when the tracing code is fixed */ |
| typedef unsigned int xfs_alloctype_t; |
| |
| #define XFS_ALLOC_TYPES \ |
| { XFS_ALLOCTYPE_FIRST_AG, "FIRST_AG" }, \ |
| { XFS_ALLOCTYPE_THIS_AG, "THIS_AG" }, \ |
| { XFS_ALLOCTYPE_START_BNO, "START_BNO" }, \ |
| { XFS_ALLOCTYPE_NEAR_BNO, "NEAR_BNO" }, \ |
| { XFS_ALLOCTYPE_THIS_BNO, "THIS_BNO" } |
| |
| /* |
| * Flags for xfs_alloc_fix_freelist. |
| */ |
| #define XFS_ALLOC_FLAG_TRYLOCK 0x00000001 /* use trylock for buffer locking */ |
| #define XFS_ALLOC_FLAG_FREEING 0x00000002 /* indicate caller is freeing extents*/ |
| #define XFS_ALLOC_FLAG_NORMAP 0x00000004 /* don't modify the rmapbt */ |
| #define XFS_ALLOC_FLAG_NOSHRINK 0x00000008 /* don't shrink the freelist */ |
| #define XFS_ALLOC_FLAG_CHECK 0x00000010 /* test only, don't modify args */ |
| |
| /* |
| * Argument structure for xfs_alloc routines. |
| * This is turned into a structure to avoid having 20 arguments passed |
| * down several levels of the stack. |
| */ |
| typedef struct xfs_alloc_arg { |
| struct xfs_trans *tp; /* transaction pointer */ |
| struct xfs_mount *mp; /* file system mount point */ |
| struct xfs_buf *agbp; /* buffer for a.g. freelist header */ |
| struct xfs_perag *pag; /* per-ag struct for this agno */ |
| xfs_fsblock_t fsbno; /* file system block number */ |
| xfs_agnumber_t agno; /* allocation group number */ |
| xfs_agblock_t agbno; /* allocation group-relative block # */ |
| xfs_extlen_t minlen; /* minimum size of extent */ |
| xfs_extlen_t maxlen; /* maximum size of extent */ |
| xfs_extlen_t mod; /* mod value for extent size */ |
| xfs_extlen_t prod; /* prod value for extent size */ |
| xfs_extlen_t minleft; /* min blocks must be left after us */ |
| xfs_extlen_t total; /* total blocks needed in xaction */ |
| xfs_extlen_t alignment; /* align answer to multiple of this */ |
| xfs_extlen_t minalignslop; /* slop for minlen+alignment calcs */ |
| xfs_agblock_t min_agbno; /* set an agbno range for NEAR allocs */ |
| xfs_agblock_t max_agbno; /* ... */ |
| xfs_extlen_t len; /* output: actual size of extent */ |
| xfs_alloctype_t type; /* allocation type XFS_ALLOCTYPE_... */ |
| xfs_alloctype_t otype; /* original allocation type */ |
| int datatype; /* mask defining data type treatment */ |
| char wasdel; /* set if allocation was prev delayed */ |
| char wasfromfl; /* set if allocation is from freelist */ |
| struct xfs_owner_info oinfo; /* owner of blocks being allocated */ |
| enum xfs_ag_resv_type resv; /* block reservation to use */ |
| #ifdef DEBUG |
| bool alloc_minlen_only; /* allocate exact minlen extent */ |
| #endif |
| } xfs_alloc_arg_t; |
| |
| /* |
| * Defines for datatype |
| */ |
| #define XFS_ALLOC_USERDATA (1 << 0)/* allocation is for user data*/ |
| #define XFS_ALLOC_INITIAL_USER_DATA (1 << 1)/* special case start of file */ |
| #define XFS_ALLOC_NOBUSY (1 << 2)/* Busy extents not allowed */ |
| |
| /* freespace limit calculations */ |
| #define XFS_ALLOC_AGFL_RESERVE 4 |
| unsigned int xfs_alloc_set_aside(struct xfs_mount *mp); |
| unsigned int xfs_alloc_ag_max_usable(struct xfs_mount *mp); |
| |
| xfs_extlen_t xfs_alloc_longest_free_extent(struct xfs_perag *pag, |
| xfs_extlen_t need, xfs_extlen_t reserved); |
| unsigned int xfs_alloc_min_freelist(struct xfs_mount *mp, |
| struct xfs_perag *pag); |
| |
| /* |
| * Compute and fill in value of m_ag_maxlevels. |
| */ |
| void |
| xfs_alloc_compute_maxlevels( |
| struct xfs_mount *mp); /* file system mount structure */ |
| |
| /* |
| * Get a block from the freelist. |
| * Returns with the buffer for the block gotten. |
| */ |
| int /* error */ |
| xfs_alloc_get_freelist( |
| struct xfs_trans *tp, /* transaction pointer */ |
| struct xfs_buf *agbp, /* buffer containing the agf structure */ |
| xfs_agblock_t *bnop, /* block address retrieved from freelist */ |
| int btreeblk); /* destination is a AGF btree */ |
| |
| /* |
| * Log the given fields from the agf structure. |
| */ |
| void |
| xfs_alloc_log_agf( |
| struct xfs_trans *tp, /* transaction pointer */ |
| struct xfs_buf *bp, /* buffer for a.g. freelist header */ |
| int fields);/* mask of fields to be logged (XFS_AGF_...) */ |
| |
| /* |
| * Interface for inode allocation to force the pag data to be initialized. |
| */ |
| int /* error */ |
| xfs_alloc_pagf_init( |
| struct xfs_mount *mp, /* file system mount structure */ |
| struct xfs_trans *tp, /* transaction pointer */ |
| xfs_agnumber_t agno, /* allocation group number */ |
| int flags); /* XFS_ALLOC_FLAGS_... */ |
| |
| /* |
| * Put the block on the freelist for the allocation group. |
| */ |
| int /* error */ |
| xfs_alloc_put_freelist( |
| struct xfs_trans *tp, /* transaction pointer */ |
| struct xfs_buf *agbp, /* buffer for a.g. freelist header */ |
| struct xfs_buf *agflbp,/* buffer for a.g. free block array */ |
| xfs_agblock_t bno, /* block being freed */ |
| int btreeblk); /* owner was a AGF btree */ |
| |
| /* |
| * Read in the allocation group header (free/alloc section). |
| */ |
| int /* error */ |
| xfs_alloc_read_agf( |
| struct xfs_mount *mp, /* mount point structure */ |
| struct xfs_trans *tp, /* transaction pointer */ |
| xfs_agnumber_t agno, /* allocation group number */ |
| int flags, /* XFS_ALLOC_FLAG_... */ |
| struct xfs_buf **bpp); /* buffer for the ag freelist header */ |
| |
| /* |
| * Allocate an extent (variable-size). |
| */ |
| int /* error */ |
| xfs_alloc_vextent( |
| xfs_alloc_arg_t *args); /* allocation argument structure */ |
| |
| /* |
| * Free an extent. |
| */ |
| int /* error */ |
| __xfs_free_extent( |
| struct xfs_trans *tp, /* transaction pointer */ |
| xfs_fsblock_t bno, /* starting block number of extent */ |
| xfs_extlen_t len, /* length of extent */ |
| const struct xfs_owner_info *oinfo, /* extent owner */ |
| enum xfs_ag_resv_type type, /* block reservation type */ |
| bool skip_discard); |
| |
| static inline int |
| xfs_free_extent( |
| struct xfs_trans *tp, |
| xfs_fsblock_t bno, |
| xfs_extlen_t len, |
| const struct xfs_owner_info *oinfo, |
| enum xfs_ag_resv_type type) |
| { |
| return __xfs_free_extent(tp, bno, len, oinfo, type, false); |
| } |
| |
| int /* error */ |
| xfs_alloc_lookup_le( |
| struct xfs_btree_cur *cur, /* btree cursor */ |
| xfs_agblock_t bno, /* starting block of extent */ |
| xfs_extlen_t len, /* length of extent */ |
| int *stat); /* success/failure */ |
| |
| int /* error */ |
| xfs_alloc_lookup_ge( |
| struct xfs_btree_cur *cur, /* btree cursor */ |
| xfs_agblock_t bno, /* starting block of extent */ |
| xfs_extlen_t len, /* length of extent */ |
| int *stat); /* success/failure */ |
| |
| int /* error */ |
| xfs_alloc_get_rec( |
| struct xfs_btree_cur *cur, /* btree cursor */ |
| xfs_agblock_t *bno, /* output: starting block of extent */ |
| xfs_extlen_t *len, /* output: length of extent */ |
| int *stat); /* output: success/failure */ |
| |
| int xfs_read_agf(struct xfs_mount *mp, struct xfs_trans *tp, |
| xfs_agnumber_t agno, int flags, struct xfs_buf **bpp); |
| int xfs_alloc_read_agfl(struct xfs_mount *mp, struct xfs_trans *tp, |
| xfs_agnumber_t agno, struct xfs_buf **bpp); |
| int xfs_free_agfl_block(struct xfs_trans *, xfs_agnumber_t, xfs_agblock_t, |
| struct xfs_buf *, struct xfs_owner_info *); |
| int xfs_alloc_fix_freelist(struct xfs_alloc_arg *args, int flags); |
| int xfs_free_extent_fix_freelist(struct xfs_trans *tp, struct xfs_perag *pag, |
| struct xfs_buf **agbp); |
| |
| xfs_extlen_t xfs_prealloc_blocks(struct xfs_mount *mp); |
| |
| typedef int (*xfs_alloc_query_range_fn)( |
| struct xfs_btree_cur *cur, |
| struct xfs_alloc_rec_incore *rec, |
| void *priv); |
| |
| int xfs_alloc_query_range(struct xfs_btree_cur *cur, |
| struct xfs_alloc_rec_incore *low_rec, |
| struct xfs_alloc_rec_incore *high_rec, |
| xfs_alloc_query_range_fn fn, void *priv); |
| int xfs_alloc_query_all(struct xfs_btree_cur *cur, xfs_alloc_query_range_fn fn, |
| void *priv); |
| |
| int xfs_alloc_has_record(struct xfs_btree_cur *cur, xfs_agblock_t bno, |
| xfs_extlen_t len, bool *exist); |
| |
| typedef int (*xfs_agfl_walk_fn)(struct xfs_mount *mp, xfs_agblock_t bno, |
| void *priv); |
| int xfs_agfl_walk(struct xfs_mount *mp, struct xfs_agf *agf, |
| struct xfs_buf *agflbp, xfs_agfl_walk_fn walk_fn, void *priv); |
| |
| static inline __be32 * |
| xfs_buf_to_agfl_bno( |
| struct xfs_buf *bp) |
| { |
| if (xfs_sb_version_hascrc(&bp->b_mount->m_sb)) |
| return bp->b_addr + sizeof(struct xfs_agfl); |
| return bp->b_addr; |
| } |
| |
| #endif /* __XFS_ALLOC_H__ */ |