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_log_item_desc; 31 struct xfs_mount; 32 struct xfs_trans; 33 struct xfs_trans_res; 34 struct xfs_dquot_acct; 35 struct xfs_busy_extent; 36 struct xfs_rud_log_item; 37 struct xfs_rui_log_item; 38 struct xfs_btree_cur; 39 struct xfs_cui_log_item; 40 struct xfs_cud_log_item; 41 struct xfs_defer_ops; 42 struct xfs_bui_log_item; 43 struct xfs_bud_log_item; 44 45 typedef struct xfs_log_item { 46 struct list_head li_ail; /* AIL pointers */ 47 xfs_lsn_t li_lsn; /* last on-disk lsn */ 48 struct xfs_log_item_desc *li_desc; /* ptr to current desc*/ 49 struct xfs_mount *li_mountp; /* ptr to fs mount */ 50 struct xfs_ail *li_ailp; /* ptr to AIL */ 51 uint li_type; /* item type */ 52 uint li_flags; /* misc flags */ 53 struct xfs_log_item *li_bio_list; /* buffer item list */ 54 void (*li_cb)(struct xfs_buf *, 55 struct xfs_log_item *); 56 /* buffer item iodone */ 57 /* callback func */ 58 const struct xfs_item_ops *li_ops; /* function list */ 59 60 /* delayed logging */ 61 struct list_head li_cil; /* CIL pointers */ 62 struct xfs_log_vec *li_lv; /* active log vector */ 63 struct xfs_log_vec *li_lv_shadow; /* standby vector */ 64 xfs_lsn_t li_seq; /* CIL commit seq */ 65 } xfs_log_item_t; 66 67 #define XFS_LI_IN_AIL 0x1 68 #define XFS_LI_ABORTED 0x2 69 70 #define XFS_LI_FLAGS \ 71 { XFS_LI_IN_AIL, "IN_AIL" }, \ 72 { XFS_LI_ABORTED, "ABORTED" } 73 74 struct xfs_item_ops { 75 void (*iop_size)(xfs_log_item_t *, int *, int *); 76 void (*iop_format)(xfs_log_item_t *, struct xfs_log_vec *); 77 void (*iop_pin)(xfs_log_item_t *); 78 void (*iop_unpin)(xfs_log_item_t *, int remove); 79 uint (*iop_push)(struct xfs_log_item *, struct list_head *); 80 void (*iop_unlock)(xfs_log_item_t *); 81 xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t); 82 void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t); 83 }; 84 85 void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item, 86 int type, const struct xfs_item_ops *ops); 87 88 /* 89 * Return values for the iop_push() routines. 90 */ 91 #define XFS_ITEM_SUCCESS 0 92 #define XFS_ITEM_PINNED 1 93 #define XFS_ITEM_LOCKED 2 94 #define XFS_ITEM_FLUSHING 3 95 96 97 /* 98 * This is the structure maintained for every active transaction. 99 */ 100 typedef struct xfs_trans { 101 unsigned int t_magic; /* magic number */ 102 unsigned int t_log_res; /* amt of log space resvd */ 103 unsigned int t_log_count; /* count for perm log res */ 104 unsigned int t_blk_res; /* # of blocks resvd */ 105 unsigned int t_blk_res_used; /* # of resvd blocks used */ 106 unsigned int t_rtx_res; /* # of rt extents resvd */ 107 unsigned int t_rtx_res_used; /* # of resvd rt extents used */ 108 struct xlog_ticket *t_ticket; /* log mgr ticket */ 109 xfs_lsn_t t_lsn; /* log seq num of start of 110 * transaction. */ 111 xfs_lsn_t t_commit_lsn; /* log seq num of end of 112 * transaction. */ 113 struct xfs_mount *t_mountp; /* ptr to fs mount struct */ 114 struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */ 115 unsigned int t_flags; /* misc flags */ 116 int64_t t_icount_delta; /* superblock icount change */ 117 int64_t t_ifree_delta; /* superblock ifree change */ 118 int64_t t_fdblocks_delta; /* superblock fdblocks chg */ 119 int64_t t_res_fdblocks_delta; /* on-disk only chg */ 120 int64_t t_frextents_delta;/* superblock freextents chg*/ 121 int64_t t_res_frextents_delta; /* on-disk only chg */ 122 #if defined(DEBUG) || defined(XFS_WARN) 123 int64_t t_ag_freeblks_delta; /* debugging counter */ 124 int64_t t_ag_flist_delta; /* debugging counter */ 125 int64_t t_ag_btree_delta; /* debugging counter */ 126 #endif 127 int64_t t_dblocks_delta;/* superblock dblocks change */ 128 int64_t t_agcount_delta;/* superblock agcount change */ 129 int64_t t_imaxpct_delta;/* superblock imaxpct change */ 130 int64_t t_rextsize_delta;/* superblock rextsize chg */ 131 int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */ 132 int64_t t_rblocks_delta;/* superblock rblocks change */ 133 int64_t t_rextents_delta;/* superblocks rextents chg */ 134 int64_t t_rextslog_delta;/* superblocks rextslog chg */ 135 struct list_head t_items; /* log item descriptors */ 136 struct list_head t_busy; /* list of busy extents */ 137 unsigned long t_pflags; /* saved process flags state */ 138 } xfs_trans_t; 139 140 /* 141 * XFS transaction mechanism exported interfaces that are 142 * actually macros. 143 */ 144 #define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC) 145 146 #if defined(DEBUG) || defined(XFS_WARN) 147 #define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d) 148 #define xfs_trans_agflist_delta(tp, d) ((tp)->t_ag_flist_delta += (int64_t)d) 149 #define xfs_trans_agbtree_delta(tp, d) ((tp)->t_ag_btree_delta += (int64_t)d) 150 #else 151 #define xfs_trans_agblocks_delta(tp, d) 152 #define xfs_trans_agflist_delta(tp, d) 153 #define xfs_trans_agbtree_delta(tp, d) 154 #endif 155 156 /* 157 * XFS transaction mechanism exported interfaces. 158 */ 159 int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp, 160 uint blocks, uint rtextents, uint flags, 161 struct xfs_trans **tpp); 162 void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t); 163 164 struct xfs_buf *xfs_trans_get_buf_map(struct xfs_trans *tp, 165 struct xfs_buftarg *target, 166 struct xfs_buf_map *map, int nmaps, 167 uint flags); 168 169 static inline struct xfs_buf * 170 xfs_trans_get_buf( 171 struct xfs_trans *tp, 172 struct xfs_buftarg *target, 173 xfs_daddr_t blkno, 174 int numblks, 175 uint flags) 176 { 177 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 178 return xfs_trans_get_buf_map(tp, target, &map, 1, flags); 179 } 180 181 int xfs_trans_read_buf_map(struct xfs_mount *mp, 182 struct xfs_trans *tp, 183 struct xfs_buftarg *target, 184 struct xfs_buf_map *map, int nmaps, 185 xfs_buf_flags_t flags, 186 struct xfs_buf **bpp, 187 const struct xfs_buf_ops *ops); 188 189 static inline int 190 xfs_trans_read_buf( 191 struct xfs_mount *mp, 192 struct xfs_trans *tp, 193 struct xfs_buftarg *target, 194 xfs_daddr_t blkno, 195 int numblks, 196 xfs_buf_flags_t flags, 197 struct xfs_buf **bpp, 198 const struct xfs_buf_ops *ops) 199 { 200 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 201 return xfs_trans_read_buf_map(mp, tp, target, &map, 1, 202 flags, bpp, ops); 203 } 204 205 struct xfs_buf *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int); 206 207 void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *); 208 void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *); 209 void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *); 210 void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *); 211 void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *); 212 void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *); 213 void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *); 214 void xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *); 215 void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint); 216 void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *); 217 void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int); 218 void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint); 219 void xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint); 220 void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); 221 222 void xfs_extent_free_init_defer_op(void); 223 struct xfs_efd_log_item *xfs_trans_get_efd(struct xfs_trans *, 224 struct xfs_efi_log_item *, 225 uint); 226 int xfs_trans_free_extent(struct xfs_trans *, 227 struct xfs_efd_log_item *, xfs_fsblock_t, 228 xfs_extlen_t, struct xfs_owner_info *); 229 int xfs_trans_commit(struct xfs_trans *); 230 int __xfs_trans_roll(struct xfs_trans **, struct xfs_inode *, int *); 231 int xfs_trans_roll(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 kmem_zone_t *xfs_trans_zone; 242 extern kmem_zone_t *xfs_log_item_desc_zone; 243 244 /* rmap updates */ 245 enum xfs_rmap_intent_type; 246 247 void xfs_rmap_update_init_defer_op(void); 248 struct xfs_rud_log_item *xfs_trans_get_rud(struct xfs_trans *tp, 249 struct xfs_rui_log_item *ruip); 250 int xfs_trans_log_finish_rmap_update(struct xfs_trans *tp, 251 struct xfs_rud_log_item *rudp, enum xfs_rmap_intent_type type, 252 __uint64_t owner, int whichfork, xfs_fileoff_t startoff, 253 xfs_fsblock_t startblock, xfs_filblks_t blockcount, 254 xfs_exntst_t state, struct xfs_btree_cur **pcur); 255 256 /* refcount updates */ 257 enum xfs_refcount_intent_type; 258 259 void xfs_refcount_update_init_defer_op(void); 260 struct xfs_cud_log_item *xfs_trans_get_cud(struct xfs_trans *tp, 261 struct xfs_cui_log_item *cuip); 262 int xfs_trans_log_finish_refcount_update(struct xfs_trans *tp, 263 struct xfs_cud_log_item *cudp, struct xfs_defer_ops *dfops, 264 enum xfs_refcount_intent_type type, xfs_fsblock_t startblock, 265 xfs_extlen_t blockcount, xfs_fsblock_t *new_fsb, 266 xfs_extlen_t *new_len, struct xfs_btree_cur **pcur); 267 268 /* mapping updates */ 269 enum xfs_bmap_intent_type; 270 271 void xfs_bmap_update_init_defer_op(void); 272 struct xfs_bud_log_item *xfs_trans_get_bud(struct xfs_trans *tp, 273 struct xfs_bui_log_item *buip); 274 int xfs_trans_log_finish_bmap_update(struct xfs_trans *tp, 275 struct xfs_bud_log_item *rudp, struct xfs_defer_ops *dfops, 276 enum xfs_bmap_intent_type type, struct xfs_inode *ip, 277 int whichfork, xfs_fileoff_t startoff, xfs_fsblock_t startblock, 278 xfs_filblks_t blockcount, xfs_exntst_t state); 279 280 #endif /* __XFS_TRANS_H__ */ 281