1 /* 2 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #ifndef __XFS_TRANS_H__ 19 #define __XFS_TRANS_H__ 20 21 /* kernel only transaction subsystem defines */ 22 23 struct xfs_buf; 24 struct xfs_buftarg; 25 struct xfs_efd_log_item; 26 struct xfs_efi_log_item; 27 struct xfs_inode; 28 struct xfs_item_ops; 29 struct xfs_log_iovec; 30 struct xfs_mount; 31 struct xfs_trans; 32 struct xfs_trans_res; 33 struct xfs_dquot_acct; 34 struct xfs_rud_log_item; 35 struct xfs_rui_log_item; 36 struct xfs_btree_cur; 37 struct xfs_cui_log_item; 38 struct xfs_cud_log_item; 39 struct xfs_defer_ops; 40 struct xfs_bui_log_item; 41 struct xfs_bud_log_item; 42 43 typedef struct xfs_log_item { 44 struct list_head li_ail; /* AIL pointers */ 45 struct list_head li_trans; /* transaction list */ 46 xfs_lsn_t li_lsn; /* last on-disk lsn */ 47 struct xfs_mount *li_mountp; /* ptr to fs mount */ 48 struct xfs_ail *li_ailp; /* ptr to AIL */ 49 uint li_type; /* item type */ 50 unsigned long li_flags; /* misc flags */ 51 struct xfs_buf *li_buf; /* real buffer pointer */ 52 struct list_head li_bio_list; /* buffer item list */ 53 void (*li_cb)(struct xfs_buf *, 54 struct xfs_log_item *); 55 /* buffer item iodone */ 56 /* callback func */ 57 const struct xfs_item_ops *li_ops; /* function list */ 58 59 /* delayed logging */ 60 struct list_head li_cil; /* CIL pointers */ 61 struct xfs_log_vec *li_lv; /* active log vector */ 62 struct xfs_log_vec *li_lv_shadow; /* standby vector */ 63 xfs_lsn_t li_seq; /* CIL commit seq */ 64 } xfs_log_item_t; 65 66 /* 67 * li_flags use the (set/test/clear)_bit atomic interfaces because updates can 68 * race with each other and we don't want to have to use the AIL lock to 69 * serialise all updates. 70 */ 71 #define XFS_LI_IN_AIL 0 72 #define XFS_LI_ABORTED 1 73 #define XFS_LI_FAILED 2 74 #define XFS_LI_DIRTY 3 /* log item dirty in transaction */ 75 76 #define XFS_LI_FLAGS \ 77 { (1 << XFS_LI_IN_AIL), "IN_AIL" }, \ 78 { (1 << XFS_LI_ABORTED), "ABORTED" }, \ 79 { (1 << XFS_LI_FAILED), "FAILED" }, \ 80 { (1 << XFS_LI_DIRTY), "DIRTY" } 81 82 struct xfs_item_ops { 83 void (*iop_size)(xfs_log_item_t *, int *, int *); 84 void (*iop_format)(xfs_log_item_t *, struct xfs_log_vec *); 85 void (*iop_pin)(xfs_log_item_t *); 86 void (*iop_unpin)(xfs_log_item_t *, int remove); 87 uint (*iop_push)(struct xfs_log_item *, struct list_head *); 88 void (*iop_unlock)(xfs_log_item_t *); 89 xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t); 90 void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t); 91 void (*iop_error)(xfs_log_item_t *, xfs_buf_t *); 92 }; 93 94 void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item, 95 int type, const struct xfs_item_ops *ops); 96 97 /* 98 * Return values for the iop_push() routines. 99 */ 100 #define XFS_ITEM_SUCCESS 0 101 #define XFS_ITEM_PINNED 1 102 #define XFS_ITEM_LOCKED 2 103 #define XFS_ITEM_FLUSHING 3 104 105 106 /* 107 * This is the structure maintained for every active transaction. 108 */ 109 typedef struct xfs_trans { 110 unsigned int t_magic; /* magic number */ 111 unsigned int t_log_res; /* amt of log space resvd */ 112 unsigned int t_log_count; /* count for perm log res */ 113 unsigned int t_blk_res; /* # of blocks resvd */ 114 unsigned int t_blk_res_used; /* # of resvd blocks used */ 115 unsigned int t_rtx_res; /* # of rt extents resvd */ 116 unsigned int t_rtx_res_used; /* # of resvd rt extents used */ 117 struct xlog_ticket *t_ticket; /* log mgr ticket */ 118 struct xfs_mount *t_mountp; /* ptr to fs mount struct */ 119 struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */ 120 struct xfs_defer_ops *t_agfl_dfops; /* optional agfl fixup dfops */ 121 unsigned int t_flags; /* misc flags */ 122 int64_t t_icount_delta; /* superblock icount change */ 123 int64_t t_ifree_delta; /* superblock ifree change */ 124 int64_t t_fdblocks_delta; /* superblock fdblocks chg */ 125 int64_t t_res_fdblocks_delta; /* on-disk only chg */ 126 int64_t t_frextents_delta;/* superblock freextents chg*/ 127 int64_t t_res_frextents_delta; /* on-disk only chg */ 128 #if defined(DEBUG) || defined(XFS_WARN) 129 int64_t t_ag_freeblks_delta; /* debugging counter */ 130 int64_t t_ag_flist_delta; /* debugging counter */ 131 int64_t t_ag_btree_delta; /* debugging counter */ 132 #endif 133 int64_t t_dblocks_delta;/* superblock dblocks change */ 134 int64_t t_agcount_delta;/* superblock agcount change */ 135 int64_t t_imaxpct_delta;/* superblock imaxpct change */ 136 int64_t t_rextsize_delta;/* superblock rextsize chg */ 137 int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */ 138 int64_t t_rblocks_delta;/* superblock rblocks change */ 139 int64_t t_rextents_delta;/* superblocks rextents chg */ 140 int64_t t_rextslog_delta;/* superblocks rextslog chg */ 141 struct list_head t_items; /* log item descriptors */ 142 struct list_head t_busy; /* list of busy extents */ 143 unsigned long t_pflags; /* saved process flags state */ 144 } xfs_trans_t; 145 146 /* 147 * XFS transaction mechanism exported interfaces that are 148 * actually macros. 149 */ 150 #define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC) 151 152 #if defined(DEBUG) || defined(XFS_WARN) 153 #define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d) 154 #define xfs_trans_agflist_delta(tp, d) ((tp)->t_ag_flist_delta += (int64_t)d) 155 #define xfs_trans_agbtree_delta(tp, d) ((tp)->t_ag_btree_delta += (int64_t)d) 156 #else 157 #define xfs_trans_agblocks_delta(tp, d) 158 #define xfs_trans_agflist_delta(tp, d) 159 #define xfs_trans_agbtree_delta(tp, d) 160 #endif 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 struct xfs_buf *xfs_trans_get_buf_map(struct xfs_trans *tp, 173 struct xfs_buftarg *target, 174 struct xfs_buf_map *map, int nmaps, 175 uint flags); 176 177 static inline struct xfs_buf * 178 xfs_trans_get_buf( 179 struct xfs_trans *tp, 180 struct xfs_buftarg *target, 181 xfs_daddr_t blkno, 182 int numblks, 183 uint flags) 184 { 185 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 186 return xfs_trans_get_buf_map(tp, target, &map, 1, flags); 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(xfs_trans_t *, struct xfs_mount *, int); 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 void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); 231 232 void xfs_extent_free_init_defer_op(void); 233 struct xfs_efd_log_item *xfs_trans_get_efd(struct xfs_trans *, 234 struct xfs_efi_log_item *, 235 uint); 236 int xfs_trans_free_extent(struct xfs_trans *, 237 struct xfs_efd_log_item *, xfs_fsblock_t, 238 xfs_extlen_t, struct xfs_owner_info *, 239 bool); 240 int xfs_trans_commit(struct xfs_trans *); 241 int xfs_trans_roll(struct xfs_trans **); 242 int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *); 243 void xfs_trans_cancel(xfs_trans_t *); 244 int xfs_trans_ail_init(struct xfs_mount *); 245 void xfs_trans_ail_destroy(struct xfs_mount *); 246 247 void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *, 248 enum xfs_blft); 249 void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp, 250 struct xfs_buf *src_bp); 251 252 extern kmem_zone_t *xfs_trans_zone; 253 254 /* rmap updates */ 255 enum xfs_rmap_intent_type; 256 257 void xfs_rmap_update_init_defer_op(void); 258 struct xfs_rud_log_item *xfs_trans_get_rud(struct xfs_trans *tp, 259 struct xfs_rui_log_item *ruip); 260 int xfs_trans_log_finish_rmap_update(struct xfs_trans *tp, 261 struct xfs_rud_log_item *rudp, enum xfs_rmap_intent_type type, 262 uint64_t owner, int whichfork, xfs_fileoff_t startoff, 263 xfs_fsblock_t startblock, xfs_filblks_t blockcount, 264 xfs_exntst_t state, struct xfs_btree_cur **pcur); 265 266 /* refcount updates */ 267 enum xfs_refcount_intent_type; 268 269 void xfs_refcount_update_init_defer_op(void); 270 struct xfs_cud_log_item *xfs_trans_get_cud(struct xfs_trans *tp, 271 struct xfs_cui_log_item *cuip); 272 int xfs_trans_log_finish_refcount_update(struct xfs_trans *tp, 273 struct xfs_cud_log_item *cudp, struct xfs_defer_ops *dfops, 274 enum xfs_refcount_intent_type type, xfs_fsblock_t startblock, 275 xfs_extlen_t blockcount, xfs_fsblock_t *new_fsb, 276 xfs_extlen_t *new_len, struct xfs_btree_cur **pcur); 277 278 /* mapping updates */ 279 enum xfs_bmap_intent_type; 280 281 void xfs_bmap_update_init_defer_op(void); 282 struct xfs_bud_log_item *xfs_trans_get_bud(struct xfs_trans *tp, 283 struct xfs_bui_log_item *buip); 284 int xfs_trans_log_finish_bmap_update(struct xfs_trans *tp, 285 struct xfs_bud_log_item *rudp, struct xfs_defer_ops *dfops, 286 enum xfs_bmap_intent_type type, struct xfs_inode *ip, 287 int whichfork, xfs_fileoff_t startoff, xfs_fsblock_t startblock, 288 xfs_filblks_t *blockcount, xfs_exntst_t state); 289 290 #endif /* __XFS_TRANS_H__ */ 291