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 59 #define XFS_LI_WHITEOUT 4 60 61 #define XFS_LI_FLAGS \ 62 { (1u << XFS_LI_IN_AIL), "IN_AIL" }, \ 63 { (1u << XFS_LI_ABORTED), "ABORTED" }, \ 64 { (1u << XFS_LI_FAILED), "FAILED" }, \ 65 { (1u << XFS_LI_DIRTY), "DIRTY" }, \ 66 { (1u << XFS_LI_WHITEOUT), "WHITEOUT" } 67 68 struct xfs_item_ops { 69 unsigned flags; 70 void (*iop_size)(struct xfs_log_item *, int *, int *); 71 void (*iop_format)(struct xfs_log_item *, struct xfs_log_vec *); 72 void (*iop_pin)(struct xfs_log_item *); 73 void (*iop_unpin)(struct xfs_log_item *, int remove); 74 uint (*iop_push)(struct xfs_log_item *, struct list_head *); 75 void (*iop_committing)(struct xfs_log_item *lip, xfs_csn_t seq); 76 void (*iop_release)(struct xfs_log_item *); 77 xfs_lsn_t (*iop_committed)(struct xfs_log_item *, xfs_lsn_t); 78 int (*iop_recover)(struct xfs_log_item *lip, 79 struct list_head *capture_list); 80 bool (*iop_match)(struct xfs_log_item *item, uint64_t id); 81 struct xfs_log_item *(*iop_relog)(struct xfs_log_item *intent, 82 struct xfs_trans *tp); 83 struct xfs_log_item *(*iop_intent)(struct xfs_log_item *intent_done); 84 }; 85 86 /* 87 * Log item ops flags 88 */ 89 /* 90 * Release the log item when the journal commits instead of inserting into the 91 * AIL for writeback tracking and/or log tail pinning. 92 */ 93 #define XFS_ITEM_RELEASE_WHEN_COMMITTED (1 << 0) 94 #define XFS_ITEM_INTENT (1 << 1) 95 #define XFS_ITEM_INTENT_DONE (1 << 2) 96 97 static inline bool 98 xlog_item_is_intent(struct xfs_log_item *lip) 99 { 100 return lip->li_ops->flags & XFS_ITEM_INTENT; 101 } 102 103 static inline bool 104 xlog_item_is_intent_done(struct xfs_log_item *lip) 105 { 106 return lip->li_ops->flags & XFS_ITEM_INTENT_DONE; 107 } 108 109 void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item, 110 int type, const struct xfs_item_ops *ops); 111 112 /* 113 * Return values for the iop_push() routines. 114 */ 115 #define XFS_ITEM_SUCCESS 0 116 #define XFS_ITEM_PINNED 1 117 #define XFS_ITEM_LOCKED 2 118 #define XFS_ITEM_FLUSHING 3 119 120 /* 121 * This is the structure maintained for every active transaction. 122 */ 123 typedef struct xfs_trans { 124 unsigned int t_magic; /* magic number */ 125 unsigned int t_log_res; /* amt of log space resvd */ 126 unsigned int t_log_count; /* count for perm log res */ 127 unsigned int t_blk_res; /* # of blocks resvd */ 128 unsigned int t_blk_res_used; /* # of resvd blocks used */ 129 unsigned int t_rtx_res; /* # of rt extents resvd */ 130 unsigned int t_rtx_res_used; /* # of resvd rt extents used */ 131 unsigned int t_flags; /* misc flags */ 132 xfs_fsblock_t t_firstblock; /* first block allocated */ 133 struct xlog_ticket *t_ticket; /* log mgr ticket */ 134 struct xfs_mount *t_mountp; /* ptr to fs mount struct */ 135 struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */ 136 int64_t t_icount_delta; /* superblock icount change */ 137 int64_t t_ifree_delta; /* superblock ifree change */ 138 int64_t t_fdblocks_delta; /* superblock fdblocks chg */ 139 int64_t t_res_fdblocks_delta; /* on-disk only chg */ 140 int64_t t_frextents_delta;/* superblock freextents chg*/ 141 int64_t t_res_frextents_delta; /* on-disk only chg */ 142 int64_t t_dblocks_delta;/* superblock dblocks change */ 143 int64_t t_agcount_delta;/* superblock agcount change */ 144 int64_t t_imaxpct_delta;/* superblock imaxpct change */ 145 int64_t t_rextsize_delta;/* superblock rextsize chg */ 146 int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */ 147 int64_t t_rblocks_delta;/* superblock rblocks change */ 148 int64_t t_rextents_delta;/* superblocks rextents chg */ 149 int64_t t_rextslog_delta;/* superblocks rextslog chg */ 150 struct list_head t_items; /* log item descriptors */ 151 struct list_head t_busy; /* list of busy extents */ 152 struct list_head t_dfops; /* deferred operations */ 153 unsigned long t_pflags; /* saved process flags state */ 154 } xfs_trans_t; 155 156 /* 157 * XFS transaction mechanism exported interfaces that are 158 * actually macros. 159 */ 160 #define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC) 161 162 /* 163 * XFS transaction mechanism exported interfaces. 164 */ 165 int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp, 166 uint blocks, uint rtextents, uint flags, 167 struct xfs_trans **tpp); 168 int xfs_trans_alloc_empty(struct xfs_mount *mp, 169 struct xfs_trans **tpp); 170 void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t); 171 172 int xfs_trans_get_buf_map(struct xfs_trans *tp, struct xfs_buftarg *target, 173 struct xfs_buf_map *map, int nmaps, xfs_buf_flags_t flags, 174 struct xfs_buf **bpp); 175 176 static inline int 177 xfs_trans_get_buf( 178 struct xfs_trans *tp, 179 struct xfs_buftarg *target, 180 xfs_daddr_t blkno, 181 int numblks, 182 xfs_buf_flags_t flags, 183 struct xfs_buf **bpp) 184 { 185 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 186 return xfs_trans_get_buf_map(tp, target, &map, 1, flags, bpp); 187 } 188 189 int xfs_trans_read_buf_map(struct xfs_mount *mp, 190 struct xfs_trans *tp, 191 struct xfs_buftarg *target, 192 struct xfs_buf_map *map, int nmaps, 193 xfs_buf_flags_t flags, 194 struct xfs_buf **bpp, 195 const struct xfs_buf_ops *ops); 196 197 static inline int 198 xfs_trans_read_buf( 199 struct xfs_mount *mp, 200 struct xfs_trans *tp, 201 struct xfs_buftarg *target, 202 xfs_daddr_t blkno, 203 int numblks, 204 xfs_buf_flags_t flags, 205 struct xfs_buf **bpp, 206 const struct xfs_buf_ops *ops) 207 { 208 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 209 return xfs_trans_read_buf_map(mp, tp, target, &map, 1, 210 flags, bpp, ops); 211 } 212 213 struct xfs_buf *xfs_trans_getsb(struct xfs_trans *); 214 215 void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *); 216 void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *); 217 void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *); 218 void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *); 219 void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *); 220 void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *); 221 void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *); 222 bool xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *); 223 void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint); 224 void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *); 225 void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int); 226 void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint); 227 void xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint, 228 uint); 229 void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *); 230 bool xfs_trans_buf_is_dirty(struct xfs_buf *bp); 231 void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); 232 233 int xfs_trans_commit(struct xfs_trans *); 234 int xfs_trans_roll(struct xfs_trans **); 235 int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *); 236 void xfs_trans_cancel(xfs_trans_t *); 237 int xfs_trans_ail_init(struct xfs_mount *); 238 void xfs_trans_ail_destroy(struct xfs_mount *); 239 240 void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *, 241 enum xfs_blft); 242 void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp, 243 struct xfs_buf *src_bp); 244 245 extern struct kmem_cache *xfs_trans_cache; 246 247 static inline struct xfs_log_item * 248 xfs_trans_item_relog( 249 struct xfs_log_item *lip, 250 struct xfs_trans *tp) 251 { 252 return lip->li_ops->iop_relog(lip, tp); 253 } 254 255 struct xfs_dquot; 256 257 int xfs_trans_alloc_inode(struct xfs_inode *ip, struct xfs_trans_res *resv, 258 unsigned int dblocks, unsigned int rblocks, bool force, 259 struct xfs_trans **tpp); 260 int xfs_trans_alloc_icreate(struct xfs_mount *mp, struct xfs_trans_res *resv, 261 struct xfs_dquot *udqp, struct xfs_dquot *gdqp, 262 struct xfs_dquot *pdqp, unsigned int dblocks, 263 struct xfs_trans **tpp); 264 int xfs_trans_alloc_ichange(struct xfs_inode *ip, struct xfs_dquot *udqp, 265 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, bool force, 266 struct xfs_trans **tpp); 267 int xfs_trans_alloc_dir(struct xfs_inode *dp, struct xfs_trans_res *resv, 268 struct xfs_inode *ip, unsigned int *dblocks, 269 struct xfs_trans **tpp, int *nospace_error); 270 271 static inline void 272 xfs_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 } 279 280 static inline void 281 xfs_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 } 289 290 static inline void 291 xfs_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