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 11 struct xfs_buf; 12 struct xfs_buftarg; 13 struct xfs_efd_log_item; 14 struct xfs_efi_log_item; 15 struct xfs_inode; 16 struct xfs_item_ops; 17 struct xfs_log_iovec; 18 struct xfs_mount; 19 struct xfs_trans; 20 struct xfs_trans_res; 21 struct xfs_dquot_acct; 22 struct xfs_rud_log_item; 23 struct xfs_rui_log_item; 24 struct xfs_btree_cur; 25 struct xfs_cui_log_item; 26 struct xfs_cud_log_item; 27 struct xfs_bui_log_item; 28 struct xfs_bud_log_item; 29 30 struct 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_lsn_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 65 struct 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 *, xfs_lsn_t commit_lsn); 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? */ 83 static inline bool 84 xlog_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? */ 91 static inline bool 92 xlog_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) 103 104 void 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 */ 124 typedef 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 */ 181 int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp, 182 uint blocks, uint rtextents, uint flags, 183 struct xfs_trans **tpp); 184 int xfs_trans_alloc_empty(struct xfs_mount *mp, 185 struct xfs_trans **tpp); 186 void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t); 187 188 int 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); 191 192 static inline int 193 xfs_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 } 204 205 int 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); 212 213 static inline int 214 xfs_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 } 228 229 struct xfs_buf *xfs_trans_getsb(struct xfs_trans *); 230 231 void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *); 232 void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *); 233 void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *); 234 void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *); 235 void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *); 236 void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *); 237 void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *); 238 bool xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *); 239 void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint); 240 void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *); 241 void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int); 242 void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint); 243 void xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint, 244 uint); 245 void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *); 246 bool xfs_trans_buf_is_dirty(struct xfs_buf *bp); 247 void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); 248 249 int xfs_trans_commit(struct xfs_trans *); 250 int xfs_trans_roll(struct xfs_trans **); 251 int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *); 252 void xfs_trans_cancel(xfs_trans_t *); 253 int xfs_trans_ail_init(struct xfs_mount *); 254 void xfs_trans_ail_destroy(struct xfs_mount *); 255 256 void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *, 257 enum xfs_blft); 258 void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp, 259 struct xfs_buf *src_bp); 260 261 extern kmem_zone_t *xfs_trans_zone; 262 263 static inline struct xfs_log_item * 264 xfs_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 } 270 271 struct xfs_dquot; 272 273 int xfs_trans_alloc_inode(struct xfs_inode *ip, struct xfs_trans_res *resv, 274 unsigned int dblocks, unsigned int rblocks, bool force, 275 struct xfs_trans **tpp); 276 int xfs_trans_alloc_icreate(struct xfs_mount *mp, struct xfs_trans_res *resv, 277 struct xfs_dquot *udqp, struct xfs_dquot *gdqp, 278 struct xfs_dquot *pdqp, unsigned int dblocks, 279 struct xfs_trans **tpp); 280 int xfs_trans_alloc_ichange(struct xfs_inode *ip, struct xfs_dquot *udqp, 281 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, bool force, 282 struct xfs_trans **tpp); 283 284 static inline void 285 xfs_trans_set_context( 286 struct xfs_trans *tp) 287 { 288 ASSERT(current->journal_info == NULL); 289 tp->t_pflags = memalloc_nofs_save(); 290 current->journal_info = tp; 291 } 292 293 static inline void 294 xfs_trans_clear_context( 295 struct xfs_trans *tp) 296 { 297 if (current->journal_info == tp) { 298 memalloc_nofs_restore(tp->t_pflags); 299 current->journal_info = NULL; 300 } 301 } 302 303 static inline void 304 xfs_trans_switch_context( 305 struct xfs_trans *old_tp, 306 struct xfs_trans *new_tp) 307 { 308 ASSERT(current->journal_info == old_tp); 309 new_tp->t_pflags = old_tp->t_pflags; 310 old_tp->t_pflags = 0; 311 current->journal_info = new_tp; 312 } 313 314 #endif /* __XFS_TRANS_H__ */ 315