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_defer_ops; 28 struct xfs_bui_log_item; 29 struct xfs_bud_log_item; 30 31 typedef 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 xfs_mount *li_mountp; /* ptr to fs mount */ 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 void (*li_cb)(struct xfs_buf *, 42 struct xfs_log_item *); 43 /* buffer item iodone */ 44 /* callback func */ 45 const struct xfs_item_ops *li_ops; /* function list */ 46 47 /* delayed logging */ 48 struct list_head li_cil; /* CIL pointers */ 49 struct xfs_log_vec *li_lv; /* active log vector */ 50 struct xfs_log_vec *li_lv_shadow; /* standby vector */ 51 xfs_lsn_t li_seq; /* CIL commit seq */ 52 } xfs_log_item_t; 53 54 /* 55 * li_flags use the (set/test/clear)_bit atomic interfaces because updates can 56 * race with each other and we don't want to have to use the AIL lock to 57 * serialise all updates. 58 */ 59 #define XFS_LI_IN_AIL 0 60 #define XFS_LI_ABORTED 1 61 #define XFS_LI_FAILED 2 62 #define XFS_LI_DIRTY 3 /* log item dirty in transaction */ 63 64 #define XFS_LI_FLAGS \ 65 { (1 << XFS_LI_IN_AIL), "IN_AIL" }, \ 66 { (1 << XFS_LI_ABORTED), "ABORTED" }, \ 67 { (1 << XFS_LI_FAILED), "FAILED" }, \ 68 { (1 << XFS_LI_DIRTY), "DIRTY" } 69 70 struct xfs_item_ops { 71 void (*iop_size)(xfs_log_item_t *, int *, int *); 72 void (*iop_format)(xfs_log_item_t *, struct xfs_log_vec *); 73 void (*iop_pin)(xfs_log_item_t *); 74 void (*iop_unpin)(xfs_log_item_t *, int remove); 75 uint (*iop_push)(struct xfs_log_item *, struct list_head *); 76 void (*iop_unlock)(xfs_log_item_t *); 77 xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t); 78 void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t); 79 void (*iop_error)(xfs_log_item_t *, xfs_buf_t *); 80 }; 81 82 void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item, 83 int type, const struct xfs_item_ops *ops); 84 85 /* 86 * Return values for the iop_push() routines. 87 */ 88 #define XFS_ITEM_SUCCESS 0 89 #define XFS_ITEM_PINNED 1 90 #define XFS_ITEM_LOCKED 2 91 #define XFS_ITEM_FLUSHING 3 92 93 94 /* 95 * This is the structure maintained for every active transaction. 96 */ 97 typedef struct xfs_trans { 98 unsigned int t_magic; /* magic number */ 99 unsigned int t_log_res; /* amt of log space resvd */ 100 unsigned int t_log_count; /* count for perm log res */ 101 unsigned int t_blk_res; /* # of blocks resvd */ 102 unsigned int t_blk_res_used; /* # of resvd blocks used */ 103 unsigned int t_rtx_res; /* # of rt extents resvd */ 104 unsigned int t_rtx_res_used; /* # of resvd rt extents used */ 105 struct xlog_ticket *t_ticket; /* log mgr ticket */ 106 struct xfs_mount *t_mountp; /* ptr to fs mount struct */ 107 struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */ 108 struct xfs_defer_ops *t_agfl_dfops; /* optional agfl fixup dfops */ 109 unsigned int t_flags; /* misc flags */ 110 int64_t t_icount_delta; /* superblock icount change */ 111 int64_t t_ifree_delta; /* superblock ifree change */ 112 int64_t t_fdblocks_delta; /* superblock fdblocks chg */ 113 int64_t t_res_fdblocks_delta; /* on-disk only chg */ 114 int64_t t_frextents_delta;/* superblock freextents chg*/ 115 int64_t t_res_frextents_delta; /* on-disk only chg */ 116 #if defined(DEBUG) || defined(XFS_WARN) 117 int64_t t_ag_freeblks_delta; /* debugging counter */ 118 int64_t t_ag_flist_delta; /* debugging counter */ 119 int64_t t_ag_btree_delta; /* debugging counter */ 120 #endif 121 int64_t t_dblocks_delta;/* superblock dblocks change */ 122 int64_t t_agcount_delta;/* superblock agcount change */ 123 int64_t t_imaxpct_delta;/* superblock imaxpct change */ 124 int64_t t_rextsize_delta;/* superblock rextsize chg */ 125 int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */ 126 int64_t t_rblocks_delta;/* superblock rblocks change */ 127 int64_t t_rextents_delta;/* superblocks rextents chg */ 128 int64_t t_rextslog_delta;/* superblocks rextslog chg */ 129 struct list_head t_items; /* log item descriptors */ 130 struct list_head t_busy; /* list of busy extents */ 131 unsigned long t_pflags; /* saved process flags state */ 132 } xfs_trans_t; 133 134 /* 135 * XFS transaction mechanism exported interfaces that are 136 * actually macros. 137 */ 138 #define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC) 139 140 #if defined(DEBUG) || defined(XFS_WARN) 141 #define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d) 142 #define xfs_trans_agflist_delta(tp, d) ((tp)->t_ag_flist_delta += (int64_t)d) 143 #define xfs_trans_agbtree_delta(tp, d) ((tp)->t_ag_btree_delta += (int64_t)d) 144 #else 145 #define xfs_trans_agblocks_delta(tp, d) 146 #define xfs_trans_agflist_delta(tp, d) 147 #define xfs_trans_agbtree_delta(tp, d) 148 #endif 149 150 /* 151 * XFS transaction mechanism exported interfaces. 152 */ 153 int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp, 154 uint blocks, uint rtextents, uint flags, 155 struct xfs_trans **tpp); 156 int xfs_trans_alloc_empty(struct xfs_mount *mp, 157 struct xfs_trans **tpp); 158 void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t); 159 160 struct xfs_buf *xfs_trans_get_buf_map(struct xfs_trans *tp, 161 struct xfs_buftarg *target, 162 struct xfs_buf_map *map, int nmaps, 163 uint flags); 164 165 static inline struct xfs_buf * 166 xfs_trans_get_buf( 167 struct xfs_trans *tp, 168 struct xfs_buftarg *target, 169 xfs_daddr_t blkno, 170 int numblks, 171 uint flags) 172 { 173 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 174 return xfs_trans_get_buf_map(tp, target, &map, 1, flags); 175 } 176 177 int xfs_trans_read_buf_map(struct xfs_mount *mp, 178 struct xfs_trans *tp, 179 struct xfs_buftarg *target, 180 struct xfs_buf_map *map, int nmaps, 181 xfs_buf_flags_t flags, 182 struct xfs_buf **bpp, 183 const struct xfs_buf_ops *ops); 184 185 static inline int 186 xfs_trans_read_buf( 187 struct xfs_mount *mp, 188 struct xfs_trans *tp, 189 struct xfs_buftarg *target, 190 xfs_daddr_t blkno, 191 int numblks, 192 xfs_buf_flags_t flags, 193 struct xfs_buf **bpp, 194 const struct xfs_buf_ops *ops) 195 { 196 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 197 return xfs_trans_read_buf_map(mp, tp, target, &map, 1, 198 flags, bpp, ops); 199 } 200 201 struct xfs_buf *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int); 202 203 void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *); 204 void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *); 205 void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *); 206 void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *); 207 void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *); 208 void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *); 209 void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *); 210 bool xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *); 211 void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint); 212 void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *); 213 void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int); 214 void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint); 215 void xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint, 216 uint); 217 void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *); 218 void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); 219 220 void xfs_extent_free_init_defer_op(void); 221 struct xfs_efd_log_item *xfs_trans_get_efd(struct xfs_trans *, 222 struct xfs_efi_log_item *, 223 uint); 224 int xfs_trans_free_extent(struct xfs_trans *, 225 struct xfs_efd_log_item *, xfs_fsblock_t, 226 xfs_extlen_t, struct xfs_owner_info *, 227 bool); 228 int xfs_trans_commit(struct xfs_trans *); 229 int xfs_trans_roll(struct xfs_trans **); 230 int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *); 231 void xfs_trans_cancel(xfs_trans_t *); 232 int xfs_trans_ail_init(struct xfs_mount *); 233 void xfs_trans_ail_destroy(struct xfs_mount *); 234 235 void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *, 236 enum xfs_blft); 237 void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp, 238 struct xfs_buf *src_bp); 239 240 extern kmem_zone_t *xfs_trans_zone; 241 242 /* rmap updates */ 243 enum xfs_rmap_intent_type; 244 245 void xfs_rmap_update_init_defer_op(void); 246 struct xfs_rud_log_item *xfs_trans_get_rud(struct xfs_trans *tp, 247 struct xfs_rui_log_item *ruip); 248 int xfs_trans_log_finish_rmap_update(struct xfs_trans *tp, 249 struct xfs_rud_log_item *rudp, enum xfs_rmap_intent_type type, 250 uint64_t owner, int whichfork, xfs_fileoff_t startoff, 251 xfs_fsblock_t startblock, xfs_filblks_t blockcount, 252 xfs_exntst_t state, struct xfs_btree_cur **pcur); 253 254 /* refcount updates */ 255 enum xfs_refcount_intent_type; 256 257 void xfs_refcount_update_init_defer_op(void); 258 struct xfs_cud_log_item *xfs_trans_get_cud(struct xfs_trans *tp, 259 struct xfs_cui_log_item *cuip); 260 int xfs_trans_log_finish_refcount_update(struct xfs_trans *tp, 261 struct xfs_cud_log_item *cudp, struct xfs_defer_ops *dfops, 262 enum xfs_refcount_intent_type type, xfs_fsblock_t startblock, 263 xfs_extlen_t blockcount, xfs_fsblock_t *new_fsb, 264 xfs_extlen_t *new_len, struct xfs_btree_cur **pcur); 265 266 /* mapping updates */ 267 enum xfs_bmap_intent_type; 268 269 void xfs_bmap_update_init_defer_op(void); 270 struct xfs_bud_log_item *xfs_trans_get_bud(struct xfs_trans *tp, 271 struct xfs_bui_log_item *buip); 272 int xfs_trans_log_finish_bmap_update(struct xfs_trans *tp, 273 struct xfs_bud_log_item *rudp, struct xfs_defer_ops *dfops, 274 enum xfs_bmap_intent_type type, struct xfs_inode *ip, 275 int whichfork, xfs_fileoff_t startoff, xfs_fsblock_t startblock, 276 xfs_filblks_t *blockcount, xfs_exntst_t state); 277 278 #endif /* __XFS_TRANS_H__ */ 279