| // 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; |
| |
| 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 */ |
| 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 */ |
| }; |
| |
| /* |
| * 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 { |
| unsigned flags; |
| void (*iop_size)(struct xfs_log_item *, int *, int *); |
| void (*iop_format)(struct xfs_log_item *, struct xfs_log_vec *); |
| void (*iop_pin)(struct xfs_log_item *); |
| void (*iop_unpin)(struct xfs_log_item *, int remove); |
| uint (*iop_push)(struct xfs_log_item *, struct list_head *); |
| void (*iop_committing)(struct xfs_log_item *, xfs_lsn_t commit_lsn); |
| void (*iop_release)(struct xfs_log_item *); |
| xfs_lsn_t (*iop_committed)(struct xfs_log_item *, xfs_lsn_t); |
| int (*iop_recover)(struct xfs_log_item *lip, struct xfs_trans *tp); |
| bool (*iop_match)(struct xfs_log_item *item, uint64_t id); |
| }; |
| |
| /* Is this log item a deferred action intent? */ |
| static inline bool |
| xlog_item_is_intent(struct xfs_log_item *lip) |
| { |
| return lip->li_ops->iop_recover != NULL && |
| lip->li_ops->iop_match != NULL; |
| } |
| |
| /* Is this a log intent-done item? */ |
| static inline bool |
| xlog_item_is_intent_done(struct xfs_log_item *lip) |
| { |
| return lip->li_ops->iop_unpin == NULL && |
| lip->li_ops->iop_push == NULL; |
| } |
| |
| /* |
| * Release the log item as soon as committed. This is for items just logging |
| * intents that never need to be written back in place. |
| */ |
| #define XFS_ITEM_RELEASE_WHEN_COMMITTED (1 << 0) |
| |
| 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); |
| |
| int xfs_trans_get_buf_map(struct xfs_trans *tp, struct xfs_buftarg *target, |
| struct xfs_buf_map *map, int nmaps, xfs_buf_flags_t flags, |
| struct xfs_buf **bpp); |
| |
| static inline int |
| xfs_trans_get_buf( |
| struct xfs_trans *tp, |
| struct xfs_buftarg *target, |
| xfs_daddr_t blkno, |
| int numblks, |
| uint flags, |
| struct xfs_buf **bpp) |
| { |
| DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); |
| return xfs_trans_get_buf_map(tp, target, &map, 1, flags, bpp); |
| } |
| |
| 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(struct xfs_trans *); |
| |
| 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 *); |
| bool xfs_trans_buf_is_dirty(struct xfs_buf *bp); |
| void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); |
| |
| 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; |
| |
| #endif /* __XFS_TRANS_H__ */ |