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 typedef 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 void (*li_cb)(struct xfs_buf *, 41 struct xfs_log_item *); 42 /* buffer item iodone */ 43 /* callback func */ 44 const struct xfs_item_ops *li_ops; /* function list */ 45 46 /* delayed logging */ 47 struct list_head li_cil; /* CIL pointers */ 48 struct xfs_log_vec *li_lv; /* active log vector */ 49 struct xfs_log_vec *li_lv_shadow; /* standby vector */ 50 xfs_lsn_t li_seq; /* CIL commit seq */ 51 } xfs_log_item_t; 52 53 /* 54 * li_flags use the (set/test/clear)_bit atomic interfaces because updates can 55 * race with each other and we don't want to have to use the AIL lock to 56 * serialise all updates. 57 */ 58 #define XFS_LI_IN_AIL 0 59 #define XFS_LI_ABORTED 1 60 #define XFS_LI_FAILED 2 61 #define XFS_LI_DIRTY 3 /* log item dirty in transaction */ 62 63 #define XFS_LI_FLAGS \ 64 { (1 << XFS_LI_IN_AIL), "IN_AIL" }, \ 65 { (1 << XFS_LI_ABORTED), "ABORTED" }, \ 66 { (1 << XFS_LI_FAILED), "FAILED" }, \ 67 { (1 << XFS_LI_DIRTY), "DIRTY" } 68 69 struct xfs_item_ops { 70 void (*iop_size)(xfs_log_item_t *, int *, int *); 71 void (*iop_format)(xfs_log_item_t *, struct xfs_log_vec *); 72 void (*iop_pin)(xfs_log_item_t *); 73 void (*iop_unpin)(xfs_log_item_t *, int remove); 74 uint (*iop_push)(struct xfs_log_item *, struct list_head *); 75 void (*iop_unlock)(xfs_log_item_t *); 76 xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t); 77 void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t); 78 void (*iop_error)(xfs_log_item_t *, xfs_buf_t *); 79 }; 80 81 void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item, 82 int type, const struct xfs_item_ops *ops); 83 84 /* 85 * Return values for the iop_push() routines. 86 */ 87 #define XFS_ITEM_SUCCESS 0 88 #define XFS_ITEM_PINNED 1 89 #define XFS_ITEM_LOCKED 2 90 #define XFS_ITEM_FLUSHING 3 91 92 /* 93 * Deferred operation item relogging limits. 94 */ 95 #define XFS_DEFER_OPS_NR_INODES 2 /* join up to two inodes */ 96 #define XFS_DEFER_OPS_NR_BUFS 2 /* join up to two buffers */ 97 98 /* 99 * This is the structure maintained for every active transaction. 100 */ 101 typedef struct xfs_trans { 102 unsigned int t_magic; /* magic number */ 103 unsigned int t_log_res; /* amt of log space resvd */ 104 unsigned int t_log_count; /* count for perm log res */ 105 unsigned int t_blk_res; /* # of blocks resvd */ 106 unsigned int t_blk_res_used; /* # of resvd blocks used */ 107 unsigned int t_rtx_res; /* # of rt extents resvd */ 108 unsigned int t_rtx_res_used; /* # of resvd rt extents used */ 109 unsigned int t_flags; /* misc flags */ 110 xfs_fsblock_t t_firstblock; /* first block allocated */ 111 struct xlog_ticket *t_ticket; /* log mgr ticket */ 112 struct xfs_mount *t_mountp; /* ptr to fs mount struct */ 113 struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */ 114 int64_t t_icount_delta; /* superblock icount change */ 115 int64_t t_ifree_delta; /* superblock ifree change */ 116 int64_t t_fdblocks_delta; /* superblock fdblocks chg */ 117 int64_t t_res_fdblocks_delta; /* on-disk only chg */ 118 int64_t t_frextents_delta;/* superblock freextents chg*/ 119 int64_t t_res_frextents_delta; /* on-disk only chg */ 120 #if defined(DEBUG) || defined(XFS_WARN) 121 int64_t t_ag_freeblks_delta; /* debugging counter */ 122 int64_t t_ag_flist_delta; /* debugging counter */ 123 int64_t t_ag_btree_delta; /* debugging counter */ 124 #endif 125 int64_t t_dblocks_delta;/* superblock dblocks change */ 126 int64_t t_agcount_delta;/* superblock agcount change */ 127 int64_t t_imaxpct_delta;/* superblock imaxpct change */ 128 int64_t t_rextsize_delta;/* superblock rextsize chg */ 129 int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */ 130 int64_t t_rblocks_delta;/* superblock rblocks change */ 131 int64_t t_rextents_delta;/* superblocks rextents chg */ 132 int64_t t_rextslog_delta;/* superblocks rextslog chg */ 133 struct list_head t_items; /* log item descriptors */ 134 struct list_head t_busy; /* list of busy extents */ 135 struct list_head t_dfops; /* deferred operations */ 136 unsigned long t_pflags; /* saved process flags state */ 137 } xfs_trans_t; 138 139 /* 140 * XFS transaction mechanism exported interfaces that are 141 * actually macros. 142 */ 143 #define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC) 144 145 #if defined(DEBUG) || defined(XFS_WARN) 146 #define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d) 147 #define xfs_trans_agflist_delta(tp, d) ((tp)->t_ag_flist_delta += (int64_t)d) 148 #define xfs_trans_agbtree_delta(tp, d) ((tp)->t_ag_btree_delta += (int64_t)d) 149 #else 150 #define xfs_trans_agblocks_delta(tp, d) 151 #define xfs_trans_agflist_delta(tp, d) 152 #define xfs_trans_agbtree_delta(tp, d) 153 #endif 154 155 /* 156 * XFS transaction mechanism exported interfaces. 157 */ 158 int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp, 159 uint blocks, uint rtextents, uint flags, 160 struct xfs_trans **tpp); 161 int xfs_trans_alloc_empty(struct xfs_mount *mp, 162 struct xfs_trans **tpp); 163 void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t); 164 165 struct xfs_buf *xfs_trans_get_buf_map(struct xfs_trans *tp, 166 struct xfs_buftarg *target, 167 struct xfs_buf_map *map, int nmaps, 168 uint flags); 169 170 static inline struct xfs_buf * 171 xfs_trans_get_buf( 172 struct xfs_trans *tp, 173 struct xfs_buftarg *target, 174 xfs_daddr_t blkno, 175 int numblks, 176 uint flags) 177 { 178 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 179 return xfs_trans_get_buf_map(tp, target, &map, 1, flags); 180 } 181 182 int xfs_trans_read_buf_map(struct xfs_mount *mp, 183 struct xfs_trans *tp, 184 struct xfs_buftarg *target, 185 struct xfs_buf_map *map, int nmaps, 186 xfs_buf_flags_t flags, 187 struct xfs_buf **bpp, 188 const struct xfs_buf_ops *ops); 189 190 static inline int 191 xfs_trans_read_buf( 192 struct xfs_mount *mp, 193 struct xfs_trans *tp, 194 struct xfs_buftarg *target, 195 xfs_daddr_t blkno, 196 int numblks, 197 xfs_buf_flags_t flags, 198 struct xfs_buf **bpp, 199 const struct xfs_buf_ops *ops) 200 { 201 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 202 return xfs_trans_read_buf_map(mp, tp, target, &map, 1, 203 flags, bpp, ops); 204 } 205 206 struct xfs_buf *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int); 207 208 void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *); 209 void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *); 210 void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *); 211 void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *); 212 void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *); 213 void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *); 214 void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *); 215 bool xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *); 216 void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint); 217 void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *); 218 void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int); 219 void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint); 220 void xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint, 221 uint); 222 void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *); 223 bool xfs_trans_buf_is_dirty(struct xfs_buf *bp); 224 void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); 225 226 struct xfs_efd_log_item *xfs_trans_get_efd(struct xfs_trans *, 227 struct xfs_efi_log_item *, 228 uint); 229 int xfs_trans_free_extent(struct xfs_trans *, 230 struct xfs_efd_log_item *, xfs_fsblock_t, 231 xfs_extlen_t, 232 const struct xfs_owner_info *, 233 bool); 234 int xfs_trans_commit(struct xfs_trans *); 235 int xfs_trans_roll(struct xfs_trans **); 236 int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *); 237 void xfs_trans_cancel(xfs_trans_t *); 238 int xfs_trans_ail_init(struct xfs_mount *); 239 void xfs_trans_ail_destroy(struct xfs_mount *); 240 241 void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *, 242 enum xfs_blft); 243 void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp, 244 struct xfs_buf *src_bp); 245 246 extern kmem_zone_t *xfs_trans_zone; 247 248 /* rmap updates */ 249 enum xfs_rmap_intent_type; 250 251 struct xfs_rud_log_item *xfs_trans_get_rud(struct xfs_trans *tp, 252 struct xfs_rui_log_item *ruip); 253 int xfs_trans_log_finish_rmap_update(struct xfs_trans *tp, 254 struct xfs_rud_log_item *rudp, enum xfs_rmap_intent_type type, 255 uint64_t owner, int whichfork, xfs_fileoff_t startoff, 256 xfs_fsblock_t startblock, xfs_filblks_t blockcount, 257 xfs_exntst_t state, struct xfs_btree_cur **pcur); 258 259 /* refcount updates */ 260 enum xfs_refcount_intent_type; 261 262 struct xfs_cud_log_item *xfs_trans_get_cud(struct xfs_trans *tp, 263 struct xfs_cui_log_item *cuip); 264 int xfs_trans_log_finish_refcount_update(struct xfs_trans *tp, 265 struct xfs_cud_log_item *cudp, 266 enum xfs_refcount_intent_type type, xfs_fsblock_t startblock, 267 xfs_extlen_t blockcount, xfs_fsblock_t *new_fsb, 268 xfs_extlen_t *new_len, struct xfs_btree_cur **pcur); 269 270 /* mapping updates */ 271 enum xfs_bmap_intent_type; 272 273 struct xfs_bud_log_item *xfs_trans_get_bud(struct xfs_trans *tp, 274 struct xfs_bui_log_item *buip); 275 int xfs_trans_log_finish_bmap_update(struct xfs_trans *tp, 276 struct xfs_bud_log_item *rudp, enum xfs_bmap_intent_type type, 277 struct xfs_inode *ip, int whichfork, xfs_fileoff_t startoff, 278 xfs_fsblock_t startblock, xfs_filblks_t *blockcount, 279 xfs_exntst_t state); 280 281 #endif /* __XFS_TRANS_H__ */ 282