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 const struct xfs_item_ops *li_ops; /* function list */ 41 42 /* delayed logging */ 43 struct list_head li_cil; /* CIL pointers */ 44 struct xfs_log_vec *li_lv; /* active log vector */ 45 struct xfs_log_vec *li_lv_shadow; /* standby vector */ 46 xfs_lsn_t li_seq; /* CIL commit seq */ 47 }; 48 49 /* 50 * li_flags use the (set/test/clear)_bit atomic interfaces because updates can 51 * race with each other and we don't want to have to use the AIL lock to 52 * serialise all updates. 53 */ 54 #define XFS_LI_IN_AIL 0 55 #define XFS_LI_ABORTED 1 56 #define XFS_LI_FAILED 2 57 #define XFS_LI_DIRTY 3 /* log item dirty in transaction */ 58 #define XFS_LI_RECOVERED 4 /* log intent item has been recovered */ 59 60 #define XFS_LI_FLAGS \ 61 { (1 << XFS_LI_IN_AIL), "IN_AIL" }, \ 62 { (1 << XFS_LI_ABORTED), "ABORTED" }, \ 63 { (1 << XFS_LI_FAILED), "FAILED" }, \ 64 { (1 << XFS_LI_DIRTY), "DIRTY" }, \ 65 { (1 << XFS_LI_RECOVERED), "RECOVERED" } 66 67 struct xfs_item_ops { 68 unsigned flags; 69 void (*iop_size)(struct xfs_log_item *, int *, int *); 70 void (*iop_format)(struct xfs_log_item *, struct xfs_log_vec *); 71 void (*iop_pin)(struct xfs_log_item *); 72 void (*iop_unpin)(struct xfs_log_item *, int remove); 73 uint (*iop_push)(struct xfs_log_item *, struct list_head *); 74 void (*iop_committing)(struct xfs_log_item *, xfs_lsn_t commit_lsn); 75 void (*iop_release)(struct xfs_log_item *); 76 xfs_lsn_t (*iop_committed)(struct xfs_log_item *, xfs_lsn_t); 77 int (*iop_recover)(struct xfs_log_item *lip, struct xfs_trans *tp); 78 bool (*iop_match)(struct xfs_log_item *item, uint64_t id); 79 }; 80 81 /* 82 * Release the log item as soon as committed. This is for items just logging 83 * intents that never need to be written back in place. 84 */ 85 #define XFS_ITEM_RELEASE_WHEN_COMMITTED (1 << 0) 86 87 void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item, 88 int type, const struct xfs_item_ops *ops); 89 90 /* 91 * Return values for the iop_push() routines. 92 */ 93 #define XFS_ITEM_SUCCESS 0 94 #define XFS_ITEM_PINNED 1 95 #define XFS_ITEM_LOCKED 2 96 #define XFS_ITEM_FLUSHING 3 97 98 /* 99 * Deferred operation item relogging limits. 100 */ 101 #define XFS_DEFER_OPS_NR_INODES 2 /* join up to two inodes */ 102 #define XFS_DEFER_OPS_NR_BUFS 2 /* join up to two buffers */ 103 104 /* 105 * This is the structure maintained for every active transaction. 106 */ 107 typedef struct xfs_trans { 108 unsigned int t_magic; /* magic number */ 109 unsigned int t_log_res; /* amt of log space resvd */ 110 unsigned int t_log_count; /* count for perm log res */ 111 unsigned int t_blk_res; /* # of blocks resvd */ 112 unsigned int t_blk_res_used; /* # of resvd blocks used */ 113 unsigned int t_rtx_res; /* # of rt extents resvd */ 114 unsigned int t_rtx_res_used; /* # of resvd rt extents used */ 115 unsigned int t_flags; /* misc flags */ 116 xfs_fsblock_t t_firstblock; /* first block allocated */ 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 int64_t t_icount_delta; /* superblock icount change */ 121 int64_t t_ifree_delta; /* superblock ifree change */ 122 int64_t t_fdblocks_delta; /* superblock fdblocks chg */ 123 int64_t t_res_fdblocks_delta; /* on-disk only chg */ 124 int64_t t_frextents_delta;/* superblock freextents chg*/ 125 int64_t t_res_frextents_delta; /* on-disk only chg */ 126 #if defined(DEBUG) || defined(XFS_WARN) 127 int64_t t_ag_freeblks_delta; /* debugging counter */ 128 int64_t t_ag_flist_delta; /* debugging counter */ 129 int64_t t_ag_btree_delta; /* debugging counter */ 130 #endif 131 int64_t t_dblocks_delta;/* superblock dblocks change */ 132 int64_t t_agcount_delta;/* superblock agcount change */ 133 int64_t t_imaxpct_delta;/* superblock imaxpct change */ 134 int64_t t_rextsize_delta;/* superblock rextsize chg */ 135 int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */ 136 int64_t t_rblocks_delta;/* superblock rblocks change */ 137 int64_t t_rextents_delta;/* superblocks rextents chg */ 138 int64_t t_rextslog_delta;/* superblocks rextslog chg */ 139 struct list_head t_items; /* log item descriptors */ 140 struct list_head t_busy; /* list of busy extents */ 141 struct list_head t_dfops; /* deferred operations */ 142 unsigned long t_pflags; /* saved process flags state */ 143 } xfs_trans_t; 144 145 /* 146 * XFS transaction mechanism exported interfaces that are 147 * actually macros. 148 */ 149 #define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC) 150 151 #if defined(DEBUG) || defined(XFS_WARN) 152 #define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d) 153 #define xfs_trans_agflist_delta(tp, d) ((tp)->t_ag_flist_delta += (int64_t)d) 154 #define xfs_trans_agbtree_delta(tp, d) ((tp)->t_ag_btree_delta += (int64_t)d) 155 #else 156 #define xfs_trans_agblocks_delta(tp, d) 157 #define xfs_trans_agflist_delta(tp, d) 158 #define xfs_trans_agbtree_delta(tp, d) 159 #endif 160 161 /* 162 * XFS transaction mechanism exported interfaces. 163 */ 164 int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp, 165 uint blocks, uint rtextents, uint flags, 166 struct xfs_trans **tpp); 167 int xfs_trans_alloc_empty(struct xfs_mount *mp, 168 struct xfs_trans **tpp); 169 void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t); 170 171 int xfs_trans_get_buf_map(struct xfs_trans *tp, struct xfs_buftarg *target, 172 struct xfs_buf_map *map, int nmaps, xfs_buf_flags_t flags, 173 struct xfs_buf **bpp); 174 175 static inline int 176 xfs_trans_get_buf( 177 struct xfs_trans *tp, 178 struct xfs_buftarg *target, 179 xfs_daddr_t blkno, 180 int numblks, 181 uint flags, 182 struct xfs_buf **bpp) 183 { 184 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 185 return xfs_trans_get_buf_map(tp, target, &map, 1, flags, bpp); 186 } 187 188 int xfs_trans_read_buf_map(struct xfs_mount *mp, 189 struct xfs_trans *tp, 190 struct xfs_buftarg *target, 191 struct xfs_buf_map *map, int nmaps, 192 xfs_buf_flags_t flags, 193 struct xfs_buf **bpp, 194 const struct xfs_buf_ops *ops); 195 196 static inline int 197 xfs_trans_read_buf( 198 struct xfs_mount *mp, 199 struct xfs_trans *tp, 200 struct xfs_buftarg *target, 201 xfs_daddr_t blkno, 202 int numblks, 203 xfs_buf_flags_t flags, 204 struct xfs_buf **bpp, 205 const struct xfs_buf_ops *ops) 206 { 207 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 208 return xfs_trans_read_buf_map(mp, tp, target, &map, 1, 209 flags, bpp, ops); 210 } 211 212 struct xfs_buf *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *); 213 214 void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *); 215 void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *); 216 void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *); 217 void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *); 218 void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *); 219 void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *); 220 void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *); 221 bool xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *); 222 void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint); 223 void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *); 224 void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int); 225 void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint); 226 void xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint, 227 uint); 228 void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *); 229 bool xfs_trans_buf_is_dirty(struct xfs_buf *bp); 230 void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); 231 232 int xfs_trans_commit(struct xfs_trans *); 233 int xfs_trans_roll(struct xfs_trans **); 234 int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *); 235 void xfs_trans_cancel(xfs_trans_t *); 236 int xfs_trans_ail_init(struct xfs_mount *); 237 void xfs_trans_ail_destroy(struct xfs_mount *); 238 239 void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *, 240 enum xfs_blft); 241 void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp, 242 struct xfs_buf *src_bp); 243 244 extern kmem_zone_t *xfs_trans_zone; 245 246 #endif /* __XFS_TRANS_H__ */ 247