1// SPDX-License-Identifier: GPL-2.0 2/* 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 can 53 * race with each other and we don't want to have to use the AIL lock to 54 * serialise all updates. 55 */ 56#define XFS_LI_IN_AIL 0 57#define XFS_LI_ABORTED 1 58#define XFS_LI_FAILED 2 59#define XFS_LI_DIRTY 3 60#define XFS_LI_WHITEOUT 4 61 62#define XFS_LI_FLAGS \ 63 { (1u << XFS_LI_IN_AIL), "IN_AIL" }, \ 64 { (1u << XFS_LI_ABORTED), "ABORTED" }, \ 65 { (1u << XFS_LI_FAILED), "FAILED" }, \ 66 { (1u << XFS_LI_DIRTY), "DIRTY" }, \ 67 { (1u << XFS_LI_WHITEOUT), "WHITEOUT" } 68 69struct xfs_item_ops { 70 unsigned flags; 71 void (*iop_size)(struct xfs_log_item *, int *, int *); 72 void (*iop_format)(struct xfs_log_item *, struct xfs_log_vec *); 73 void (*iop_pin)(struct xfs_log_item *); 74 void (*iop_unpin)(struct xfs_log_item *, int remove); 75 uint64_t (*iop_sort)(struct xfs_log_item *lip); 76 int (*iop_precommit)(struct xfs_trans *tp, struct xfs_log_item *lip); 77 void (*iop_committing)(struct xfs_log_item *lip, xfs_csn_t seq); 78 xfs_lsn_t (*iop_committed)(struct xfs_log_item *, xfs_lsn_t); 79 uint (*iop_push)(struct xfs_log_item *, struct list_head *); 80 void (*iop_release)(struct xfs_log_item *); 81 bool (*iop_match)(struct xfs_log_item *item, uint64_t id); 82 struct xfs_log_item *(*iop_intent)(struct xfs_log_item *intent_done); 83}; 84 85/* 86 * Log item ops flags 87 */ 88/* 89 * Release the log item when the journal commits instead of inserting into the 90 * AIL for writeback tracking and/or log tail pinning. 91 */ 92#define XFS_ITEM_RELEASE_WHEN_COMMITTED (1 << 0) 93#define XFS_ITEM_INTENT (1 << 1) 94#define XFS_ITEM_INTENT_DONE (1 << 2) 95 96static inline bool 97xlog_item_is_intent(struct xfs_log_item *lip) 98{ 99 return lip->li_ops->flags & XFS_ITEM_INTENT; 100} 101 102static inline bool 103xlog_item_is_intent_done(struct xfs_log_item *lip) 104{ 105 return lip->li_ops->flags & XFS_ITEM_INTENT_DONE; 106} 107 108void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item, 109 int type, const struct xfs_item_ops *ops); 110 111/* 112 * Return values for the iop_push() routines. 113 */ 114#define XFS_ITEM_SUCCESS 0 115#define XFS_ITEM_PINNED 1 116#define XFS_ITEM_LOCKED 2 117#define XFS_ITEM_FLUSHING 3 118 119/* 120 * This is the structure maintained for every active transaction. 121 */ 122typedef struct xfs_trans { 123 unsigned int t_magic; /* magic number */ 124 unsigned int t_log_res; /* amt of log space resvd */ 125 unsigned int t_log_count; /* count for perm log res */ 126 unsigned int t_blk_res; /* # of blocks resvd */ 127 unsigned int t_blk_res_used; /* # of resvd blocks used */ 128 unsigned int t_rtx_res; /* # of rt extents resvd */ 129 unsigned int t_rtx_res_used; /* # of resvd rt extents used */ 130 unsigned int t_flags; /* misc flags */ 131 xfs_agnumber_t t_highest_agno; /* highest AGF locked */ 132 struct xlog_ticket *t_ticket; /* log mgr ticket */ 133 struct xfs_mount *t_mountp; /* ptr to fs mount struct */ 134 struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */ 135 int64_t t_icount_delta; /* superblock icount change */ 136 int64_t t_ifree_delta; /* superblock ifree change */ 137 int64_t t_fdblocks_delta; /* superblock fdblocks chg */ 138 int64_t t_res_fdblocks_delta; /* on-disk only chg */ 139 int64_t t_frextents_delta;/* superblock freextents chg*/ 140 int64_t t_res_frextents_delta; /* on-disk only chg */ 141 int64_t t_dblocks_delta;/* superblock dblocks change */ 142 int64_t t_agcount_delta;/* superblock agcount change */ 143 int64_t t_imaxpct_delta;/* superblock imaxpct change */ 144 int64_t t_rextsize_delta;/* superblock rextsize chg */ 145 int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */ 146 int64_t t_rblocks_delta;/* superblock rblocks change */ 147 int64_t t_rextents_delta;/* superblocks rextents chg */ 148 int64_t t_rextslog_delta;/* superblocks rextslog chg */ 149 struct list_head t_items; /* log item descriptors */ 150 struct list_head t_busy; /* list of busy extents */ 151 struct list_head t_dfops; /* deferred operations */ 152 unsigned long t_pflags; /* saved process flags state */ 153} xfs_trans_t; 154 155/* 156 * XFS transaction mechanism exported interfaces that are 157 * actually macros. 158 */ 159#define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC) 160 161/* 162 * XFS transaction mechanism exported interfaces. 163 */ 164int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp, 165 uint blocks, uint rtextents, uint flags, 166 struct xfs_trans **tpp); 167int xfs_trans_reserve_more(struct xfs_trans *tp, 168 unsigned int blocks, unsigned int rtextents); 169int xfs_trans_alloc_empty(struct xfs_mount *mp, 170 struct xfs_trans **tpp); 171void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t); 172 173int xfs_trans_get_buf_map(struct xfs_trans *tp, struct xfs_buftarg *target, 174 struct xfs_buf_map *map, int nmaps, xfs_buf_flags_t flags, 175 struct xfs_buf **bpp); 176 177static inline int 178xfs_trans_get_buf( 179 struct xfs_trans *tp, 180 struct xfs_buftarg *target, 181 xfs_daddr_t blkno, 182 int numblks, 183 xfs_buf_flags_t flags, 184 struct xfs_buf **bpp) 185{ 186 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 187 return xfs_trans_get_buf_map(tp, target, &map, 1, flags, bpp); 188} 189 190int xfs_trans_read_buf_map(struct xfs_mount *mp, 191 struct xfs_trans *tp, 192 struct xfs_buftarg *target, 193 struct xfs_buf_map *map, int nmaps, 194 xfs_buf_flags_t flags, 195 struct xfs_buf **bpp, 196 const struct xfs_buf_ops *ops); 197 198static inline int 199xfs_trans_read_buf( 200 struct xfs_mount *mp, 201 struct xfs_trans *tp, 202 struct xfs_buftarg *target, 203 xfs_daddr_t blkno, 204 int numblks, 205 xfs_buf_flags_t flags, 206 struct xfs_buf **bpp, 207 const struct xfs_buf_ops *ops) 208{ 209 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 210 return xfs_trans_read_buf_map(mp, tp, target, &map, 1, 211 flags, bpp, ops); 212} 213 214struct xfs_buf *xfs_trans_getsb(struct xfs_trans *); 215 216void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *); 217void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *); 218void xfs_trans_bdetach(struct xfs_trans *tp, struct xfs_buf *bp); 219void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *); 220void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *); 221void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *); 222void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *); 223void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *); 224bool xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *); 225void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint); 226void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *); 227void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int); 228void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint); 229void xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint, 230 uint); 231void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *); 232bool xfs_trans_buf_is_dirty(struct xfs_buf *bp); 233void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); 234 235int xfs_trans_commit(struct xfs_trans *); 236int xfs_trans_roll(struct xfs_trans **); 237int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *); 238void xfs_trans_cancel(xfs_trans_t *); 239int xfs_trans_ail_init(struct xfs_mount *); 240void xfs_trans_ail_destroy(struct xfs_mount *); 241 242void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *, 243 enum xfs_blft); 244void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp, 245 struct xfs_buf *src_bp); 246 247extern struct kmem_cache *xfs_trans_cache; 248 249struct xfs_dquot; 250 251int xfs_trans_alloc_inode(struct xfs_inode *ip, struct xfs_trans_res *resv, 252 unsigned int dblocks, unsigned int rblocks, bool force, 253 struct xfs_trans **tpp); 254int xfs_trans_reserve_more_inode(struct xfs_trans *tp, struct xfs_inode *ip, 255 unsigned int dblocks, unsigned int rblocks, bool force_quota); 256int xfs_trans_alloc_icreate(struct xfs_mount *mp, struct xfs_trans_res *resv, 257 struct xfs_dquot *udqp, struct xfs_dquot *gdqp, 258 struct xfs_dquot *pdqp, unsigned int dblocks, 259 struct xfs_trans **tpp); 260int xfs_trans_alloc_ichange(struct xfs_inode *ip, struct xfs_dquot *udqp, 261 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, bool force, 262 struct xfs_trans **tpp); 263int xfs_trans_alloc_dir(struct xfs_inode *dp, struct xfs_trans_res *resv, 264 struct xfs_inode *ip, unsigned int *dblocks, 265 struct xfs_trans **tpp, int *nospace_error); 266 267static inline void 268xfs_trans_set_context( 269 struct xfs_trans *tp) 270{ 271 tp->t_pflags = memalloc_nofs_save(); 272} 273 274static inline void 275xfs_trans_clear_context( 276 struct xfs_trans *tp) 277{ 278 memalloc_nofs_restore(tp->t_pflags); 279} 280 281static inline void 282xfs_trans_switch_context( 283 struct xfs_trans *old_tp, 284 struct xfs_trans *new_tp) 285{ 286 new_tp->t_pflags = old_tp->t_pflags; 287 old_tp->t_pflags = 0; 288} 289 290#endif /* __XFS_TRANS_H__ */ 291