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 xfs_buf; 12struct xfs_buftarg; 13struct xfs_efd_log_item; 14struct xfs_efi_log_item; 15struct xfs_inode; 16struct xfs_item_ops; 17struct xfs_log_iovec; 18struct xfs_mount; 19struct xfs_trans; 20struct xfs_trans_res; 21struct xfs_dquot_acct; 22struct xfs_rud_log_item; 23struct xfs_rui_log_item; 24struct xfs_btree_cur; 25struct xfs_cui_log_item; 26struct xfs_cud_log_item; 27struct xfs_bui_log_item; 28struct xfs_bud_log_item; 29 30struct xfs_log_item { 31 struct list_head li_ail; /* AIL pointers */ 32 struct list_head li_trans; /* transaction list */ 33 xfs_lsn_t li_lsn; /* last on-disk lsn */ 34 struct xfs_mount *li_mountp; /* ptr to fs mount */ 35 struct xfs_ail *li_ailp; /* ptr to AIL */ 36 uint li_type; /* item type */ 37 unsigned long li_flags; /* misc flags */ 38 struct xfs_buf *li_buf; /* real buffer pointer */ 39 struct list_head li_bio_list; /* buffer item list */ 40 const struct xfs_item_ops *li_ops; /* function list */ 41 42 /* delayed logging */ 43 struct list_head li_cil; /* CIL pointers */ 44 struct xfs_log_vec *li_lv; /* active log vector */ 45 struct xfs_log_vec *li_lv_shadow; /* standby vector */ 46 xfs_csn_t li_seq; /* CIL commit seq */ 47}; 48 49/* 50 * li_flags use the (set/test/clear)_bit atomic interfaces because updates can 51 * race with each other and we don't want to have to use the AIL lock to 52 * serialise all updates. 53 */ 54#define XFS_LI_IN_AIL 0 55#define XFS_LI_ABORTED 1 56#define XFS_LI_FAILED 2 57#define XFS_LI_DIRTY 3 /* log item dirty in transaction */ 58 59#define XFS_LI_FLAGS \ 60 { (1 << XFS_LI_IN_AIL), "IN_AIL" }, \ 61 { (1 << XFS_LI_ABORTED), "ABORTED" }, \ 62 { (1 << XFS_LI_FAILED), "FAILED" }, \ 63 { (1 << XFS_LI_DIRTY), "DIRTY" } 64 65struct xfs_item_ops { 66 unsigned flags; 67 void (*iop_size)(struct xfs_log_item *, int *, int *); 68 void (*iop_format)(struct xfs_log_item *, struct xfs_log_vec *); 69 void (*iop_pin)(struct xfs_log_item *); 70 void (*iop_unpin)(struct xfs_log_item *, int remove); 71 uint (*iop_push)(struct xfs_log_item *, struct list_head *); 72 void (*iop_committing)(struct xfs_log_item *lip, xfs_csn_t seq); 73 void (*iop_release)(struct xfs_log_item *); 74 xfs_lsn_t (*iop_committed)(struct xfs_log_item *, xfs_lsn_t); 75 int (*iop_recover)(struct xfs_log_item *lip, 76 struct list_head *capture_list); 77 bool (*iop_match)(struct xfs_log_item *item, uint64_t id); 78 struct xfs_log_item *(*iop_relog)(struct xfs_log_item *intent, 79 struct xfs_trans *tp); 80}; 81 82/* Is this log item a deferred action intent? */ 83static inline bool 84xlog_item_is_intent(struct xfs_log_item *lip) 85{ 86 return lip->li_ops->iop_recover != NULL && 87 lip->li_ops->iop_match != NULL; 88} 89 90/* Is this a log intent-done item? */ 91static inline bool 92xlog_item_is_intent_done(struct xfs_log_item *lip) 93{ 94 return lip->li_ops->iop_unpin == NULL && 95 lip->li_ops->iop_push == NULL; 96} 97 98/* 99 * Release the log item as soon as committed. This is for items just logging 100 * intents that never need to be written back in place. 101 */ 102#define XFS_ITEM_RELEASE_WHEN_COMMITTED (1 << 0) 103 104void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item, 105 int type, const struct xfs_item_ops *ops); 106 107/* 108 * Return values for the iop_push() routines. 109 */ 110#define XFS_ITEM_SUCCESS 0 111#define XFS_ITEM_PINNED 1 112#define XFS_ITEM_LOCKED 2 113#define XFS_ITEM_FLUSHING 3 114 115/* 116 * Deferred operation item relogging limits. 117 */ 118#define XFS_DEFER_OPS_NR_INODES 2 /* join up to two inodes */ 119#define XFS_DEFER_OPS_NR_BUFS 2 /* join up to two buffers */ 120 121/* 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_fsblock_t t_firstblock; /* first block allocated */ 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#if defined(DEBUG) || defined(XFS_WARN) 144 int64_t t_ag_freeblks_delta; /* debugging counter */ 145 int64_t t_ag_flist_delta; /* debugging counter */ 146 int64_t t_ag_btree_delta; /* debugging counter */ 147#endif 148 int64_t t_dblocks_delta;/* superblock dblocks change */ 149 int64_t t_agcount_delta;/* superblock agcount change */ 150 int64_t t_imaxpct_delta;/* superblock imaxpct change */ 151 int64_t t_rextsize_delta;/* superblock rextsize chg */ 152 int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */ 153 int64_t t_rblocks_delta;/* superblock rblocks change */ 154 int64_t t_rextents_delta;/* superblocks rextents chg */ 155 int64_t t_rextslog_delta;/* superblocks rextslog chg */ 156 struct list_head t_items; /* log item descriptors */ 157 struct list_head t_busy; /* list of busy extents */ 158 struct list_head t_dfops; /* deferred operations */ 159 unsigned long t_pflags; /* saved process flags state */ 160} xfs_trans_t; 161 162/* 163 * XFS transaction mechanism exported interfaces that are 164 * actually macros. 165 */ 166#define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC) 167 168#if defined(DEBUG) || defined(XFS_WARN) 169#define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d) 170#define xfs_trans_agflist_delta(tp, d) ((tp)->t_ag_flist_delta += (int64_t)d) 171#define xfs_trans_agbtree_delta(tp, d) ((tp)->t_ag_btree_delta += (int64_t)d) 172#else 173#define xfs_trans_agblocks_delta(tp, d) 174#define xfs_trans_agflist_delta(tp, d) 175#define xfs_trans_agbtree_delta(tp, d) 176#endif 177 178/* 179 * XFS transaction mechanism exported interfaces. 180 */ 181int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp, 182 uint blocks, uint rtextents, uint flags, 183 struct xfs_trans **tpp); 184int xfs_trans_alloc_empty(struct xfs_mount *mp, 185 struct xfs_trans **tpp); 186void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t); 187 188int xfs_trans_get_buf_map(struct xfs_trans *tp, struct xfs_buftarg *target, 189 struct xfs_buf_map *map, int nmaps, xfs_buf_flags_t flags, 190 struct xfs_buf **bpp); 191 192static inline int 193xfs_trans_get_buf( 194 struct xfs_trans *tp, 195 struct xfs_buftarg *target, 196 xfs_daddr_t blkno, 197 int numblks, 198 uint flags, 199 struct xfs_buf **bpp) 200{ 201 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 202 return xfs_trans_get_buf_map(tp, target, &map, 1, flags, bpp); 203} 204 205int xfs_trans_read_buf_map(struct xfs_mount *mp, 206 struct xfs_trans *tp, 207 struct xfs_buftarg *target, 208 struct xfs_buf_map *map, int nmaps, 209 xfs_buf_flags_t flags, 210 struct xfs_buf **bpp, 211 const struct xfs_buf_ops *ops); 212 213static inline int 214xfs_trans_read_buf( 215 struct xfs_mount *mp, 216 struct xfs_trans *tp, 217 struct xfs_buftarg *target, 218 xfs_daddr_t blkno, 219 int numblks, 220 xfs_buf_flags_t flags, 221 struct xfs_buf **bpp, 222 const struct xfs_buf_ops *ops) 223{ 224 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 225 return xfs_trans_read_buf_map(mp, tp, target, &map, 1, 226 flags, bpp, ops); 227} 228 229struct xfs_buf *xfs_trans_getsb(struct xfs_trans *); 230 231void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *); 232void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *); 233void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *); 234void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *); 235void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *); 236void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *); 237void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *); 238bool xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *); 239void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint); 240void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *); 241void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int); 242void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint); 243void xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint, 244 uint); 245void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *); 246bool xfs_trans_buf_is_dirty(struct xfs_buf *bp); 247void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); 248 249int xfs_trans_commit(struct xfs_trans *); 250int xfs_trans_roll(struct xfs_trans **); 251int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *); 252void xfs_trans_cancel(xfs_trans_t *); 253int xfs_trans_ail_init(struct xfs_mount *); 254void xfs_trans_ail_destroy(struct xfs_mount *); 255 256void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *, 257 enum xfs_blft); 258void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp, 259 struct xfs_buf *src_bp); 260 261extern kmem_zone_t *xfs_trans_zone; 262 263static inline struct xfs_log_item * 264xfs_trans_item_relog( 265 struct xfs_log_item *lip, 266 struct xfs_trans *tp) 267{ 268 return lip->li_ops->iop_relog(lip, tp); 269} 270 271static inline void 272xfs_trans_set_context( 273 struct xfs_trans *tp) 274{ 275 ASSERT(current->journal_info == NULL); 276 tp->t_pflags = memalloc_nofs_save(); 277 current->journal_info = tp; 278} 279 280static inline void 281xfs_trans_clear_context( 282 struct xfs_trans *tp) 283{ 284 if (current->journal_info == tp) { 285 memalloc_nofs_restore(tp->t_pflags); 286 current->journal_info = NULL; 287 } 288} 289 290static inline void 291xfs_trans_switch_context( 292 struct xfs_trans *old_tp, 293 struct xfs_trans *new_tp) 294{ 295 ASSERT(current->journal_info == old_tp); 296 new_tp->t_pflags = old_tp->t_pflags; 297 old_tp->t_pflags = 0; 298 current->journal_info = new_tp; 299} 300 301#endif /* __XFS_TRANS_H__ */ 302