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 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 }; 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 #define XFS_LI_RECOVERED 4 /* log intent item has been recovered */ 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 { (1 << XFS_LI_RECOVERED), "RECOVERED" } 70 71 struct xfs_item_ops { 72 unsigned flags; 73 void (*iop_size)(struct xfs_log_item *, int *, int *); 74 void (*iop_format)(struct xfs_log_item *, struct xfs_log_vec *); 75 void (*iop_pin)(struct xfs_log_item *); 76 void (*iop_unpin)(struct xfs_log_item *, int remove); 77 uint (*iop_push)(struct xfs_log_item *, struct list_head *); 78 void (*iop_committing)(struct xfs_log_item *, xfs_lsn_t commit_lsn); 79 void (*iop_release)(struct xfs_log_item *); 80 xfs_lsn_t (*iop_committed)(struct xfs_log_item *, xfs_lsn_t); 81 void (*iop_error)(struct xfs_log_item *, xfs_buf_t *); 82 int (*iop_recover)(struct xfs_log_item *lip, struct xfs_trans *tp); 83 bool (*iop_match)(struct xfs_log_item *item, uint64_t id); 84 }; 85 86 /* 87 * Release the log item as soon as committed. This is for items just logging 88 * intents that never need to be written back in place. 89 */ 90 #define XFS_ITEM_RELEASE_WHEN_COMMITTED (1 << 0) 91 92 void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item, 93 int type, const struct xfs_item_ops *ops); 94 95 /* 96 * Return values for the iop_push() routines. 97 */ 98 #define XFS_ITEM_SUCCESS 0 99 #define XFS_ITEM_PINNED 1 100 #define XFS_ITEM_LOCKED 2 101 #define XFS_ITEM_FLUSHING 3 102 103 /* 104 * Deferred operation item relogging limits. 105 */ 106 #define XFS_DEFER_OPS_NR_INODES 2 /* join up to two inodes */ 107 #define XFS_DEFER_OPS_NR_BUFS 2 /* join up to two buffers */ 108 109 /* 110 * This is the structure maintained for every active transaction. 111 */ 112 typedef struct xfs_trans { 113 unsigned int t_magic; /* magic number */ 114 unsigned int t_log_res; /* amt of log space resvd */ 115 unsigned int t_log_count; /* count for perm log res */ 116 unsigned int t_blk_res; /* # of blocks resvd */ 117 unsigned int t_blk_res_used; /* # of resvd blocks used */ 118 unsigned int t_rtx_res; /* # of rt extents resvd */ 119 unsigned int t_rtx_res_used; /* # of resvd rt extents used */ 120 unsigned int t_flags; /* misc flags */ 121 xfs_fsblock_t t_firstblock; /* first block allocated */ 122 struct xlog_ticket *t_ticket; /* log mgr ticket */ 123 struct xfs_mount *t_mountp; /* ptr to fs mount struct */ 124 struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */ 125 int64_t t_icount_delta; /* superblock icount change */ 126 int64_t t_ifree_delta; /* superblock ifree change */ 127 int64_t t_fdblocks_delta; /* superblock fdblocks chg */ 128 int64_t t_res_fdblocks_delta; /* on-disk only chg */ 129 int64_t t_frextents_delta;/* superblock freextents chg*/ 130 int64_t t_res_frextents_delta; /* on-disk only chg */ 131 #if defined(DEBUG) || defined(XFS_WARN) 132 int64_t t_ag_freeblks_delta; /* debugging counter */ 133 int64_t t_ag_flist_delta; /* debugging counter */ 134 int64_t t_ag_btree_delta; /* debugging counter */ 135 #endif 136 int64_t t_dblocks_delta;/* superblock dblocks change */ 137 int64_t t_agcount_delta;/* superblock agcount change */ 138 int64_t t_imaxpct_delta;/* superblock imaxpct change */ 139 int64_t t_rextsize_delta;/* superblock rextsize chg */ 140 int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */ 141 int64_t t_rblocks_delta;/* superblock rblocks change */ 142 int64_t t_rextents_delta;/* superblocks rextents chg */ 143 int64_t t_rextslog_delta;/* superblocks rextslog chg */ 144 struct list_head t_items; /* log item descriptors */ 145 struct list_head t_busy; /* list of busy extents */ 146 struct list_head t_dfops; /* deferred operations */ 147 unsigned long t_pflags; /* saved process flags state */ 148 } xfs_trans_t; 149 150 /* 151 * XFS transaction mechanism exported interfaces that are 152 * actually macros. 153 */ 154 #define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC) 155 156 #if defined(DEBUG) || defined(XFS_WARN) 157 #define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d) 158 #define xfs_trans_agflist_delta(tp, d) ((tp)->t_ag_flist_delta += (int64_t)d) 159 #define xfs_trans_agbtree_delta(tp, d) ((tp)->t_ag_btree_delta += (int64_t)d) 160 #else 161 #define xfs_trans_agblocks_delta(tp, d) 162 #define xfs_trans_agflist_delta(tp, d) 163 #define xfs_trans_agbtree_delta(tp, d) 164 #endif 165 166 /* 167 * XFS transaction mechanism exported interfaces. 168 */ 169 int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp, 170 uint blocks, uint rtextents, uint flags, 171 struct xfs_trans **tpp); 172 int xfs_trans_alloc_empty(struct xfs_mount *mp, 173 struct xfs_trans **tpp); 174 void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t); 175 176 int xfs_trans_get_buf_map(struct xfs_trans *tp, struct xfs_buftarg *target, 177 struct xfs_buf_map *map, int nmaps, xfs_buf_flags_t flags, 178 struct xfs_buf **bpp); 179 180 static inline int 181 xfs_trans_get_buf( 182 struct xfs_trans *tp, 183 struct xfs_buftarg *target, 184 xfs_daddr_t blkno, 185 int numblks, 186 uint flags, 187 struct xfs_buf **bpp) 188 { 189 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 190 return xfs_trans_get_buf_map(tp, target, &map, 1, flags, bpp); 191 } 192 193 int xfs_trans_read_buf_map(struct xfs_mount *mp, 194 struct xfs_trans *tp, 195 struct xfs_buftarg *target, 196 struct xfs_buf_map *map, int nmaps, 197 xfs_buf_flags_t flags, 198 struct xfs_buf **bpp, 199 const struct xfs_buf_ops *ops); 200 201 static inline int 202 xfs_trans_read_buf( 203 struct xfs_mount *mp, 204 struct xfs_trans *tp, 205 struct xfs_buftarg *target, 206 xfs_daddr_t blkno, 207 int numblks, 208 xfs_buf_flags_t flags, 209 struct xfs_buf **bpp, 210 const struct xfs_buf_ops *ops) 211 { 212 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 213 return xfs_trans_read_buf_map(mp, tp, target, &map, 1, 214 flags, bpp, ops); 215 } 216 217 struct xfs_buf *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *); 218 219 void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *); 220 void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *); 221 void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *); 222 void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *); 223 void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *); 224 void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *); 225 void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *); 226 bool xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *); 227 void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint); 228 void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *); 229 void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int); 230 void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint); 231 void xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint, 232 uint); 233 void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *); 234 bool xfs_trans_buf_is_dirty(struct xfs_buf *bp); 235 void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); 236 237 int xfs_trans_commit(struct xfs_trans *); 238 int xfs_trans_roll(struct xfs_trans **); 239 int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *); 240 void xfs_trans_cancel(xfs_trans_t *); 241 int xfs_trans_ail_init(struct xfs_mount *); 242 void xfs_trans_ail_destroy(struct xfs_mount *); 243 244 void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *, 245 enum xfs_blft); 246 void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp, 247 struct xfs_buf *src_bp); 248 249 extern kmem_zone_t *xfs_trans_zone; 250 251 #endif /* __XFS_TRANS_H__ */ 252