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 xlog; 12 struct xfs_buf; 13 struct xfs_buftarg; 14 struct xfs_efd_log_item; 15 struct xfs_efi_log_item; 16 struct xfs_inode; 17 struct xfs_item_ops; 18 struct xfs_log_iovec; 19 struct xfs_mount; 20 struct xfs_trans; 21 struct xfs_trans_res; 22 struct xfs_dquot_acct; 23 struct xfs_rud_log_item; 24 struct xfs_rui_log_item; 25 struct xfs_btree_cur; 26 struct xfs_cui_log_item; 27 struct xfs_cud_log_item; 28 struct xfs_bui_log_item; 29 struct xfs_bud_log_item; 30 31 struct 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 }; 49 50 /* 51 * li_flags use the (set/test/clear)_bit atomic interfaces because updates can 52 * race with each other and we don't want to have to use the AIL lock to 53 * serialise all updates. 54 */ 55 #define XFS_LI_IN_AIL 0 56 #define XFS_LI_ABORTED 1 57 #define XFS_LI_FAILED 2 58 #define XFS_LI_DIRTY 3 /* log item dirty in transaction */ 59 60 #define XFS_LI_FLAGS \ 61 { (1 << XFS_LI_IN_AIL), "IN_AIL" }, \ 62 { (1 << XFS_LI_ABORTED), "ABORTED" }, \ 63 { (1 << XFS_LI_FAILED), "FAILED" }, \ 64 { (1 << XFS_LI_DIRTY), "DIRTY" } 65 66 struct xfs_item_ops { 67 unsigned flags; 68 void (*iop_size)(struct xfs_log_item *, int *, int *); 69 void (*iop_format)(struct xfs_log_item *, struct xfs_log_vec *); 70 void (*iop_pin)(struct xfs_log_item *); 71 void (*iop_unpin)(struct xfs_log_item *, int remove); 72 uint (*iop_push)(struct xfs_log_item *, struct list_head *); 73 void (*iop_committing)(struct xfs_log_item *lip, xfs_csn_t seq); 74 void (*iop_release)(struct xfs_log_item *); 75 xfs_lsn_t (*iop_committed)(struct xfs_log_item *, xfs_lsn_t); 76 int (*iop_recover)(struct xfs_log_item *lip, 77 struct list_head *capture_list); 78 bool (*iop_match)(struct xfs_log_item *item, uint64_t id); 79 struct xfs_log_item *(*iop_relog)(struct xfs_log_item *intent, 80 struct xfs_trans *tp); 81 }; 82 83 /* Is this log item a deferred action intent? */ 84 static inline bool 85 xlog_item_is_intent(struct xfs_log_item *lip) 86 { 87 return lip->li_ops->iop_recover != NULL && 88 lip->li_ops->iop_match != NULL; 89 } 90 91 /* Is this a log intent-done item? */ 92 static inline bool 93 xlog_item_is_intent_done(struct xfs_log_item *lip) 94 { 95 return lip->li_ops->iop_unpin == NULL && 96 lip->li_ops->iop_push == NULL; 97 } 98 99 /* 100 * Release the log item as soon as committed. This is for items just logging 101 * intents that never need to be written back in place. 102 */ 103 #define XFS_ITEM_RELEASE_WHEN_COMMITTED (1 << 0) 104 105 void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item, 106 int type, const struct xfs_item_ops *ops); 107 108 /* 109 * Return values for the iop_push() routines. 110 */ 111 #define XFS_ITEM_SUCCESS 0 112 #define XFS_ITEM_PINNED 1 113 #define XFS_ITEM_LOCKED 2 114 #define XFS_ITEM_FLUSHING 3 115 116 /* 117 * This is the structure maintained for every active transaction. 118 */ 119 typedef struct xfs_trans { 120 unsigned int t_magic; /* magic number */ 121 unsigned int t_log_res; /* amt of log space resvd */ 122 unsigned int t_log_count; /* count for perm log res */ 123 unsigned int t_blk_res; /* # of blocks resvd */ 124 unsigned int t_blk_res_used; /* # of resvd blocks used */ 125 unsigned int t_rtx_res; /* # of rt extents resvd */ 126 unsigned int t_rtx_res_used; /* # of resvd rt extents used */ 127 unsigned int t_flags; /* misc flags */ 128 xfs_fsblock_t t_firstblock; /* first block allocated */ 129 struct xlog_ticket *t_ticket; /* log mgr ticket */ 130 struct xfs_mount *t_mountp; /* ptr to fs mount struct */ 131 struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */ 132 int64_t t_icount_delta; /* superblock icount change */ 133 int64_t t_ifree_delta; /* superblock ifree change */ 134 int64_t t_fdblocks_delta; /* superblock fdblocks chg */ 135 int64_t t_res_fdblocks_delta; /* on-disk only chg */ 136 int64_t t_frextents_delta;/* superblock freextents chg*/ 137 int64_t t_res_frextents_delta; /* on-disk only chg */ 138 int64_t t_dblocks_delta;/* superblock dblocks change */ 139 int64_t t_agcount_delta;/* superblock agcount change */ 140 int64_t t_imaxpct_delta;/* superblock imaxpct change */ 141 int64_t t_rextsize_delta;/* superblock rextsize chg */ 142 int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */ 143 int64_t t_rblocks_delta;/* superblock rblocks change */ 144 int64_t t_rextents_delta;/* superblocks rextents chg */ 145 int64_t t_rextslog_delta;/* superblocks rextslog chg */ 146 struct list_head t_items; /* log item descriptors */ 147 struct list_head t_busy; /* list of busy extents */ 148 struct list_head t_dfops; /* deferred operations */ 149 unsigned long t_pflags; /* saved process flags state */ 150 } xfs_trans_t; 151 152 /* 153 * XFS transaction mechanism exported interfaces that are 154 * actually macros. 155 */ 156 #define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC) 157 158 /* 159 * XFS transaction mechanism exported interfaces. 160 */ 161 int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp, 162 uint blocks, uint rtextents, uint flags, 163 struct xfs_trans **tpp); 164 int xfs_trans_alloc_empty(struct xfs_mount *mp, 165 struct xfs_trans **tpp); 166 void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t); 167 168 int xfs_trans_get_buf_map(struct xfs_trans *tp, struct xfs_buftarg *target, 169 struct xfs_buf_map *map, int nmaps, xfs_buf_flags_t flags, 170 struct xfs_buf **bpp); 171 172 static inline int 173 xfs_trans_get_buf( 174 struct xfs_trans *tp, 175 struct xfs_buftarg *target, 176 xfs_daddr_t blkno, 177 int numblks, 178 xfs_buf_flags_t flags, 179 struct xfs_buf **bpp) 180 { 181 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 182 return xfs_trans_get_buf_map(tp, target, &map, 1, flags, bpp); 183 } 184 185 int xfs_trans_read_buf_map(struct xfs_mount *mp, 186 struct xfs_trans *tp, 187 struct xfs_buftarg *target, 188 struct xfs_buf_map *map, int nmaps, 189 xfs_buf_flags_t flags, 190 struct xfs_buf **bpp, 191 const struct xfs_buf_ops *ops); 192 193 static inline int 194 xfs_trans_read_buf( 195 struct xfs_mount *mp, 196 struct xfs_trans *tp, 197 struct xfs_buftarg *target, 198 xfs_daddr_t blkno, 199 int numblks, 200 xfs_buf_flags_t flags, 201 struct xfs_buf **bpp, 202 const struct xfs_buf_ops *ops) 203 { 204 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 205 return xfs_trans_read_buf_map(mp, tp, target, &map, 1, 206 flags, bpp, ops); 207 } 208 209 struct xfs_buf *xfs_trans_getsb(struct xfs_trans *); 210 211 void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *); 212 void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *); 213 void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *); 214 void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *); 215 void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *); 216 void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *); 217 void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *); 218 bool xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *); 219 void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint); 220 void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *); 221 void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int); 222 void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint); 223 void xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint, 224 uint); 225 void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *); 226 bool xfs_trans_buf_is_dirty(struct xfs_buf *bp); 227 void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); 228 229 int xfs_trans_commit(struct xfs_trans *); 230 int xfs_trans_roll(struct xfs_trans **); 231 int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *); 232 void xfs_trans_cancel(xfs_trans_t *); 233 int xfs_trans_ail_init(struct xfs_mount *); 234 void xfs_trans_ail_destroy(struct xfs_mount *); 235 236 void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *, 237 enum xfs_blft); 238 void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp, 239 struct xfs_buf *src_bp); 240 241 extern struct kmem_cache *xfs_trans_cache; 242 243 static inline struct xfs_log_item * 244 xfs_trans_item_relog( 245 struct xfs_log_item *lip, 246 struct xfs_trans *tp) 247 { 248 return lip->li_ops->iop_relog(lip, tp); 249 } 250 251 struct xfs_dquot; 252 253 int xfs_trans_alloc_inode(struct xfs_inode *ip, struct xfs_trans_res *resv, 254 unsigned int dblocks, unsigned int rblocks, bool force, 255 struct xfs_trans **tpp); 256 int 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); 260 int 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); 263 int 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); 266 267 static inline void 268 xfs_trans_set_context( 269 struct xfs_trans *tp) 270 { 271 ASSERT(current->journal_info == NULL); 272 tp->t_pflags = memalloc_nofs_save(); 273 current->journal_info = tp; 274 } 275 276 static inline void 277 xfs_trans_clear_context( 278 struct xfs_trans *tp) 279 { 280 if (current->journal_info == tp) { 281 memalloc_nofs_restore(tp->t_pflags); 282 current->journal_info = NULL; 283 } 284 } 285 286 static inline void 287 xfs_trans_switch_context( 288 struct xfs_trans *old_tp, 289 struct xfs_trans *new_tp) 290 { 291 ASSERT(current->journal_info == old_tp); 292 new_tp->t_pflags = old_tp->t_pflags; 293 old_tp->t_pflags = 0; 294 current->journal_info = new_tp; 295 } 296 297 #endif /* __XFS_TRANS_H__ */ 298