292 lines · c
1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.4 * All Rights Reserved.5 */6#ifndef __XFS_TRANS_H__7#define __XFS_TRANS_H__8 9/* kernel only transaction subsystem defines */10 11struct xlog;12struct xfs_buf;13struct xfs_buftarg;14struct xfs_efd_log_item;15struct xfs_efi_log_item;16struct xfs_inode;17struct xfs_item_ops;18struct xfs_log_iovec;19struct xfs_mount;20struct xfs_trans;21struct xfs_trans_res;22struct xfs_dquot_acct;23struct xfs_rud_log_item;24struct xfs_rui_log_item;25struct xfs_btree_cur;26struct xfs_cui_log_item;27struct xfs_cud_log_item;28struct xfs_bui_log_item;29struct xfs_bud_log_item;30 31struct xfs_log_item {32 struct list_head li_ail; /* AIL pointers */33 struct list_head li_trans; /* transaction list */34 xfs_lsn_t li_lsn; /* last on-disk lsn */35 struct xlog *li_log;36 struct xfs_ail *li_ailp; /* ptr to AIL */37 uint li_type; /* item type */38 unsigned long li_flags; /* misc flags */39 struct xfs_buf *li_buf; /* real buffer pointer */40 struct list_head li_bio_list; /* buffer item list */41 const struct xfs_item_ops *li_ops; /* function list */42 43 /* delayed logging */44 struct list_head li_cil; /* CIL pointers */45 struct xfs_log_vec *li_lv; /* active log vector */46 struct xfs_log_vec *li_lv_shadow; /* standby vector */47 xfs_csn_t li_seq; /* CIL commit seq */48 uint32_t li_order_id; /* CIL commit order */49};50 51/*52 * li_flags use the (set/test/clear)_bit atomic interfaces because updates can53 * race with each other and we don't want to have to use the AIL lock to54 * serialise all updates.55 */56#define XFS_LI_IN_AIL 057#define XFS_LI_ABORTED 158#define XFS_LI_FAILED 259#define XFS_LI_DIRTY 360#define XFS_LI_WHITEOUT 461#define XFS_LI_FLUSHING 562 63#define XFS_LI_FLAGS \64 { (1u << XFS_LI_IN_AIL), "IN_AIL" }, \65 { (1u << XFS_LI_ABORTED), "ABORTED" }, \66 { (1u << XFS_LI_FAILED), "FAILED" }, \67 { (1u << XFS_LI_DIRTY), "DIRTY" }, \68 { (1u << XFS_LI_WHITEOUT), "WHITEOUT" }, \69 { (1u << XFS_LI_FLUSHING), "FLUSHING" }70 71struct xfs_item_ops {72 unsigned flags;73 void (*iop_size)(struct xfs_log_item *, int *, int *);74 void (*iop_format)(struct xfs_log_item *, struct xfs_log_vec *);75 void (*iop_pin)(struct xfs_log_item *);76 void (*iop_unpin)(struct xfs_log_item *, int remove);77 uint64_t (*iop_sort)(struct xfs_log_item *lip);78 int (*iop_precommit)(struct xfs_trans *tp, struct xfs_log_item *lip);79 void (*iop_committing)(struct xfs_log_item *lip, xfs_csn_t seq);80 xfs_lsn_t (*iop_committed)(struct xfs_log_item *, xfs_lsn_t);81 uint (*iop_push)(struct xfs_log_item *, struct list_head *);82 void (*iop_release)(struct xfs_log_item *);83 bool (*iop_match)(struct xfs_log_item *item, uint64_t id);84 struct xfs_log_item *(*iop_intent)(struct xfs_log_item *intent_done);85};86 87/*88 * Log item ops flags89 */90/*91 * Release the log item when the journal commits instead of inserting into the92 * AIL for writeback tracking and/or log tail pinning.93 */94#define XFS_ITEM_RELEASE_WHEN_COMMITTED (1 << 0)95#define XFS_ITEM_INTENT (1 << 1)96#define XFS_ITEM_INTENT_DONE (1 << 2)97 98static inline bool99xlog_item_is_intent(struct xfs_log_item *lip)100{101 return lip->li_ops->flags & XFS_ITEM_INTENT;102}103 104static inline bool105xlog_item_is_intent_done(struct xfs_log_item *lip)106{107 return lip->li_ops->flags & XFS_ITEM_INTENT_DONE;108}109 110void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item,111 int type, const struct xfs_item_ops *ops);112 113/*114 * Return values for the iop_push() routines.115 */116#define XFS_ITEM_SUCCESS 0117#define XFS_ITEM_PINNED 1118#define XFS_ITEM_LOCKED 2119#define XFS_ITEM_FLUSHING 3120 121/*122 * This is the structure maintained for every active transaction.123 */124typedef struct xfs_trans {125 unsigned int t_magic; /* magic number */126 unsigned int t_log_res; /* amt of log space resvd */127 unsigned int t_log_count; /* count for perm log res */128 unsigned int t_blk_res; /* # of blocks resvd */129 unsigned int t_blk_res_used; /* # of resvd blocks used */130 unsigned int t_rtx_res; /* # of rt extents resvd */131 unsigned int t_rtx_res_used; /* # of resvd rt extents used */132 unsigned int t_flags; /* misc flags */133 xfs_agnumber_t t_highest_agno; /* highest AGF locked */134 struct xlog_ticket *t_ticket; /* log mgr ticket */135 struct xfs_mount *t_mountp; /* ptr to fs mount struct */136 struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */137 int64_t t_icount_delta; /* superblock icount change */138 int64_t t_ifree_delta; /* superblock ifree change */139 int64_t t_fdblocks_delta; /* superblock fdblocks chg */140 int64_t t_res_fdblocks_delta; /* on-disk only chg */141 int64_t t_frextents_delta;/* superblock freextents chg*/142 int64_t t_res_frextents_delta; /* on-disk only chg */143 int64_t t_dblocks_delta;/* superblock dblocks change */144 int64_t t_agcount_delta;/* superblock agcount change */145 int64_t t_imaxpct_delta;/* superblock imaxpct change */146 int64_t t_rextsize_delta;/* superblock rextsize chg */147 int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */148 int64_t t_rblocks_delta;/* superblock rblocks change */149 int64_t t_rextents_delta;/* superblocks rextents chg */150 int64_t t_rextslog_delta;/* superblocks rextslog chg */151 struct list_head t_items; /* log item descriptors */152 struct list_head t_busy; /* list of busy extents */153 struct list_head t_dfops; /* deferred operations */154 unsigned long t_pflags; /* saved process flags state */155} xfs_trans_t;156 157/*158 * XFS transaction mechanism exported interfaces that are159 * actually macros.160 */161#define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC)162 163/*164 * XFS transaction mechanism exported interfaces.165 */166int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp,167 uint blocks, uint rtextents, uint flags,168 struct xfs_trans **tpp);169int xfs_trans_reserve_more(struct xfs_trans *tp,170 unsigned int blocks, unsigned int rtextents);171int xfs_trans_alloc_empty(struct xfs_mount *mp,172 struct xfs_trans **tpp);173void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);174 175int xfs_trans_get_buf_map(struct xfs_trans *tp, struct xfs_buftarg *target,176 struct xfs_buf_map *map, int nmaps, xfs_buf_flags_t flags,177 struct xfs_buf **bpp);178 179static inline int180xfs_trans_get_buf(181 struct xfs_trans *tp,182 struct xfs_buftarg *target,183 xfs_daddr_t blkno,184 int numblks,185 xfs_buf_flags_t flags,186 struct xfs_buf **bpp)187{188 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);189 return xfs_trans_get_buf_map(tp, target, &map, 1, flags, bpp);190}191 192int xfs_trans_read_buf_map(struct xfs_mount *mp,193 struct xfs_trans *tp,194 struct xfs_buftarg *target,195 struct xfs_buf_map *map, int nmaps,196 xfs_buf_flags_t flags,197 struct xfs_buf **bpp,198 const struct xfs_buf_ops *ops);199 200static inline int201xfs_trans_read_buf(202 struct xfs_mount *mp,203 struct xfs_trans *tp,204 struct xfs_buftarg *target,205 xfs_daddr_t blkno,206 int numblks,207 xfs_buf_flags_t flags,208 struct xfs_buf **bpp,209 const struct xfs_buf_ops *ops)210{211 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);212 return xfs_trans_read_buf_map(mp, tp, target, &map, 1,213 flags, bpp, ops);214}215 216struct xfs_buf *xfs_trans_getsb(struct xfs_trans *);217 218void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);219void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);220void xfs_trans_bdetach(struct xfs_trans *tp, struct xfs_buf *bp);221void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);222void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);223void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);224void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);225void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);226bool xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *);227void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);228void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);229void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);230void xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint,231 uint);232void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *);233bool xfs_trans_buf_is_dirty(struct xfs_buf *bp);234void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);235 236int xfs_trans_commit(struct xfs_trans *);237int xfs_trans_roll(struct xfs_trans **);238int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *);239void xfs_trans_cancel(xfs_trans_t *);240int xfs_trans_ail_init(struct xfs_mount *);241void xfs_trans_ail_destroy(struct xfs_mount *);242 243void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *,244 enum xfs_blft);245void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp,246 struct xfs_buf *src_bp);247 248extern struct kmem_cache *xfs_trans_cache;249 250struct xfs_dquot;251 252int xfs_trans_alloc_inode(struct xfs_inode *ip, struct xfs_trans_res *resv,253 unsigned int dblocks, unsigned int rblocks, bool force,254 struct xfs_trans **tpp);255int xfs_trans_reserve_more_inode(struct xfs_trans *tp, struct xfs_inode *ip,256 unsigned int dblocks, unsigned int rblocks, bool force_quota);257int xfs_trans_alloc_icreate(struct xfs_mount *mp, struct xfs_trans_res *resv,258 struct xfs_dquot *udqp, struct xfs_dquot *gdqp,259 struct xfs_dquot *pdqp, unsigned int dblocks,260 struct xfs_trans **tpp);261int xfs_trans_alloc_ichange(struct xfs_inode *ip, struct xfs_dquot *udqp,262 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, bool force,263 struct xfs_trans **tpp);264int xfs_trans_alloc_dir(struct xfs_inode *dp, struct xfs_trans_res *resv,265 struct xfs_inode *ip, unsigned int *dblocks,266 struct xfs_trans **tpp, int *nospace_error);267 268static inline void269xfs_trans_set_context(270 struct xfs_trans *tp)271{272 tp->t_pflags = memalloc_nofs_save();273}274 275static inline void276xfs_trans_clear_context(277 struct xfs_trans *tp)278{279 memalloc_nofs_restore(tp->t_pflags);280}281 282static inline void283xfs_trans_switch_context(284 struct xfs_trans *old_tp,285 struct xfs_trans *new_tp)286{287 new_tp->t_pflags = old_tp->t_pflags;288 old_tp->t_pflags = 0;289}290 291#endif /* __XFS_TRANS_H__ */292