diff options
Diffstat (limited to 'fs/xfs/xfs_trans.h')
| -rw-r--r-- | fs/xfs/xfs_trans.h | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h new file mode 100644 index 000000000..c3d278e96 --- /dev/null +++ b/fs/xfs/xfs_trans.h @@ -0,0 +1,283 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. + * All Rights Reserved. + */ +#ifndef __XFS_TRANS_H__ +#define __XFS_TRANS_H__ + +/* kernel only transaction subsystem defines */ + +struct xfs_buf; +struct xfs_buftarg; +struct xfs_efd_log_item; +struct xfs_efi_log_item; +struct xfs_inode; +struct xfs_item_ops; +struct xfs_log_iovec; +struct xfs_mount; +struct xfs_trans; +struct xfs_trans_res; +struct xfs_dquot_acct; +struct xfs_rud_log_item; +struct xfs_rui_log_item; +struct xfs_btree_cur; +struct xfs_cui_log_item; +struct xfs_cud_log_item; +struct xfs_bui_log_item; +struct xfs_bud_log_item; + +typedef struct xfs_log_item { + struct list_head li_ail; /* AIL pointers */ + struct list_head li_trans; /* transaction list */ + xfs_lsn_t li_lsn; /* last on-disk lsn */ + struct xfs_mount *li_mountp; /* ptr to fs mount */ + struct xfs_ail *li_ailp; /* ptr to AIL */ + uint li_type; /* item type */ + unsigned long li_flags; /* misc flags */ + struct xfs_buf *li_buf; /* real buffer pointer */ + struct list_head li_bio_list; /* buffer item list */ + void (*li_cb)(struct xfs_buf *, + struct xfs_log_item *); + /* buffer item iodone */ + /* callback func */ + const struct xfs_item_ops *li_ops; /* function list */ + + /* delayed logging */ + struct list_head li_cil; /* CIL pointers */ + struct xfs_log_vec *li_lv; /* active log vector */ + struct xfs_log_vec *li_lv_shadow; /* standby vector */ + xfs_lsn_t li_seq; /* CIL commit seq */ +} xfs_log_item_t; + +/* + * li_flags use the (set/test/clear)_bit atomic interfaces because updates can + * race with each other and we don't want to have to use the AIL lock to + * serialise all updates. + */ +#define XFS_LI_IN_AIL 0 +#define XFS_LI_ABORTED 1 +#define XFS_LI_FAILED 2 +#define XFS_LI_DIRTY 3 /* log item dirty in transaction */ + +#define XFS_LI_FLAGS \ + { (1 << XFS_LI_IN_AIL), "IN_AIL" }, \ + { (1 << XFS_LI_ABORTED), "ABORTED" }, \ + { (1 << XFS_LI_FAILED), "FAILED" }, \ + { (1 << XFS_LI_DIRTY), "DIRTY" } + +struct xfs_item_ops { + void (*iop_size)(xfs_log_item_t *, int *, int *); + void (*iop_format)(xfs_log_item_t *, struct xfs_log_vec *); + void (*iop_pin)(xfs_log_item_t *); + void (*iop_unpin)(xfs_log_item_t *, int remove); + uint (*iop_push)(struct xfs_log_item *, struct list_head *); + void (*iop_unlock)(xfs_log_item_t *); + xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t); + void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t); + void (*iop_error)(xfs_log_item_t *, xfs_buf_t *); +}; + +void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item, + int type, const struct xfs_item_ops *ops); + +/* + * Return values for the iop_push() routines. + */ +#define XFS_ITEM_SUCCESS 0 +#define XFS_ITEM_PINNED 1 +#define XFS_ITEM_LOCKED 2 +#define XFS_ITEM_FLUSHING 3 + +/* + * Deferred operation item relogging limits. + */ +#define XFS_DEFER_OPS_NR_INODES 2 /* join up to two inodes */ +#define XFS_DEFER_OPS_NR_BUFS 2 /* join up to two buffers */ + +/* + * This is the structure maintained for every active transaction. + */ +typedef struct xfs_trans { + unsigned int t_magic; /* magic number */ + unsigned int t_log_res; /* amt of log space resvd */ + unsigned int t_log_count; /* count for perm log res */ + unsigned int t_blk_res; /* # of blocks resvd */ + unsigned int t_blk_res_used; /* # of resvd blocks used */ + unsigned int t_rtx_res; /* # of rt extents resvd */ + unsigned int t_rtx_res_used; /* # of resvd rt extents used */ + unsigned int t_flags; /* misc flags */ + xfs_fsblock_t t_firstblock; /* first block allocated */ + struct xlog_ticket *t_ticket; /* log mgr ticket */ + struct xfs_mount *t_mountp; /* ptr to fs mount struct */ + struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */ + int64_t t_icount_delta; /* superblock icount change */ + int64_t t_ifree_delta; /* superblock ifree change */ + int64_t t_fdblocks_delta; /* superblock fdblocks chg */ + int64_t t_res_fdblocks_delta; /* on-disk only chg */ + int64_t t_frextents_delta;/* superblock freextents chg*/ + int64_t t_res_frextents_delta; /* on-disk only chg */ +#if defined(DEBUG) || defined(XFS_WARN) + int64_t t_ag_freeblks_delta; /* debugging counter */ + int64_t t_ag_flist_delta; /* debugging counter */ + int64_t t_ag_btree_delta; /* debugging counter */ +#endif + int64_t t_dblocks_delta;/* superblock dblocks change */ + int64_t t_agcount_delta;/* superblock agcount change */ + int64_t t_imaxpct_delta;/* superblock imaxpct change */ + int64_t t_rextsize_delta;/* superblock rextsize chg */ + int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */ + int64_t t_rblocks_delta;/* superblock rblocks change */ + int64_t t_rextents_delta;/* superblocks rextents chg */ + int64_t t_rextslog_delta;/* superblocks rextslog chg */ + struct list_head t_items; /* log item descriptors */ + struct list_head t_busy; /* list of busy extents */ + struct list_head t_dfops; /* deferred operations */ + unsigned long t_pflags; /* saved process flags state */ +} xfs_trans_t; + +/* + * XFS transaction mechanism exported interfaces that are + * actually macros. + */ +#define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC) + +#if defined(DEBUG) || defined(XFS_WARN) +#define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d) +#define xfs_trans_agflist_delta(tp, d) ((tp)->t_ag_flist_delta += (int64_t)d) +#define xfs_trans_agbtree_delta(tp, d) ((tp)->t_ag_btree_delta += (int64_t)d) +#else +#define xfs_trans_agblocks_delta(tp, d) +#define xfs_trans_agflist_delta(tp, d) +#define xfs_trans_agbtree_delta(tp, d) +#endif + +/* + * XFS transaction mechanism exported interfaces. + */ +int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp, + uint blocks, uint rtextents, uint flags, + struct xfs_trans **tpp); +int xfs_trans_alloc_empty(struct xfs_mount *mp, + struct xfs_trans **tpp); +void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t); + +struct xfs_buf *xfs_trans_get_buf_map(struct xfs_trans *tp, + struct xfs_buftarg *target, + struct xfs_buf_map *map, int nmaps, + uint flags); + +static inline struct xfs_buf * +xfs_trans_get_buf( + struct xfs_trans *tp, + struct xfs_buftarg *target, + xfs_daddr_t blkno, + int numblks, + uint flags) +{ + DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); + return xfs_trans_get_buf_map(tp, target, &map, 1, flags); +} + +int xfs_trans_read_buf_map(struct xfs_mount *mp, + struct xfs_trans *tp, + struct xfs_buftarg *target, + struct xfs_buf_map *map, int nmaps, + xfs_buf_flags_t flags, + struct xfs_buf **bpp, + const struct xfs_buf_ops *ops); + +static inline int +xfs_trans_read_buf( + struct xfs_mount *mp, + struct xfs_trans *tp, + struct xfs_buftarg *target, + xfs_daddr_t blkno, + int numblks, + xfs_buf_flags_t flags, + struct xfs_buf **bpp, + const struct xfs_buf_ops *ops) +{ + DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); + return xfs_trans_read_buf_map(mp, tp, target, &map, 1, + flags, bpp, ops); +} + +struct xfs_buf *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int); + +void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *); +void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *); +void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *); +void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *); +void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *); +void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *); +void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *); +bool xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *); +void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint); +void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *); +void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int); +void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint); +void xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint, + uint); +void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *); +void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); + +void xfs_extent_free_init_defer_op(void); +struct xfs_efd_log_item *xfs_trans_get_efd(struct xfs_trans *, + struct xfs_efi_log_item *, + uint); +int xfs_trans_free_extent(struct xfs_trans *, + struct xfs_efd_log_item *, xfs_fsblock_t, + xfs_extlen_t, struct xfs_owner_info *, + bool); +int xfs_trans_commit(struct xfs_trans *); +int xfs_trans_roll(struct xfs_trans **); +int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *); +void xfs_trans_cancel(xfs_trans_t *); +int xfs_trans_ail_init(struct xfs_mount *); +void xfs_trans_ail_destroy(struct xfs_mount *); + +void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *, + enum xfs_blft); +void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp, + struct xfs_buf *src_bp); + +extern kmem_zone_t *xfs_trans_zone; + +/* rmap updates */ +enum xfs_rmap_intent_type; + +void xfs_rmap_update_init_defer_op(void); +struct xfs_rud_log_item *xfs_trans_get_rud(struct xfs_trans *tp, + struct xfs_rui_log_item *ruip); +int xfs_trans_log_finish_rmap_update(struct xfs_trans *tp, + struct xfs_rud_log_item *rudp, enum xfs_rmap_intent_type type, + uint64_t owner, int whichfork, xfs_fileoff_t startoff, + xfs_fsblock_t startblock, xfs_filblks_t blockcount, + xfs_exntst_t state, struct xfs_btree_cur **pcur); + +/* refcount updates */ +enum xfs_refcount_intent_type; + +void xfs_refcount_update_init_defer_op(void); +struct xfs_cud_log_item *xfs_trans_get_cud(struct xfs_trans *tp, + struct xfs_cui_log_item *cuip); +int xfs_trans_log_finish_refcount_update(struct xfs_trans *tp, + struct xfs_cud_log_item *cudp, + enum xfs_refcount_intent_type type, xfs_fsblock_t startblock, + xfs_extlen_t blockcount, xfs_fsblock_t *new_fsb, + xfs_extlen_t *new_len, struct xfs_btree_cur **pcur); + +/* mapping updates */ +enum xfs_bmap_intent_type; + +void xfs_bmap_update_init_defer_op(void); +struct xfs_bud_log_item *xfs_trans_get_bud(struct xfs_trans *tp, + struct xfs_bui_log_item *buip); +int xfs_trans_log_finish_bmap_update(struct xfs_trans *tp, + struct xfs_bud_log_item *rudp, enum xfs_bmap_intent_type type, + struct xfs_inode *ip, int whichfork, xfs_fileoff_t startoff, + xfs_fsblock_t startblock, xfs_filblks_t *blockcount, + xfs_exntst_t state); + +#endif /* __XFS_TRANS_H__ */ |