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 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 unsigned flags; 71 void (*iop_size)(struct xfs_log_item *, int *, int *); 72 void (*iop_format)(struct xfs_log_item *, struct xfs_log_vec *); 73 void (*iop_pin)(struct xfs_log_item *); 74 void (*iop_unpin)(struct xfs_log_item *, int remove); 75 uint (*iop_push)(struct xfs_log_item *, struct list_head *); 76 void (*iop_committing)(struct xfs_log_item *, xfs_lsn_t commit_lsn); 77 void (*iop_release)(struct xfs_log_item *); 78 xfs_lsn_t (*iop_committed)(struct xfs_log_item *, xfs_lsn_t); 79 void (*iop_error)(struct xfs_log_item *, xfs_buf_t *); 80 }; 81 82 /* 83 * Release the log item as soon as committed. This is for items just logging 84 * intents that never need to be written back in place. 85 */ 86 #define XFS_ITEM_RELEASE_WHEN_COMMITTED (1 << 0) 87 88 void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item, 89 int type, const struct xfs_item_ops *ops); 90 91 /* 92 * Return values for the iop_push() routines. 93 */ 94 #define XFS_ITEM_SUCCESS 0 95 #define XFS_ITEM_PINNED 1 96 #define XFS_ITEM_LOCKED 2 97 #define XFS_ITEM_FLUSHING 3 98 99 /* 100 * Deferred operation item relogging limits. 101 */ 102 #define XFS_DEFER_OPS_NR_INODES 2 /* join up to two inodes */ 103 #define XFS_DEFER_OPS_NR_BUFS 2 /* join up to two buffers */ 104 105 /* 106 * This is the structure maintained for every active transaction. 107 */ 108 typedef struct xfs_trans { 109 unsigned int t_magic; /* magic number */ 110 unsigned int t_log_res; /* amt of log space resvd */ 111 unsigned int t_log_count; /* count for perm log res */ 112 unsigned int t_blk_res; /* # of blocks resvd */ 113 unsigned int t_blk_res_used; /* # of resvd blocks used */ 114 unsigned int t_rtx_res; /* # of rt extents resvd */ 115 unsigned int t_rtx_res_used; /* # of resvd rt extents used */ 116 unsigned int t_flags; /* misc flags */ 117 xfs_fsblock_t t_firstblock; /* first block allocated */ 118 struct xlog_ticket *t_ticket; /* log mgr ticket */ 119 struct xfs_mount *t_mountp; /* ptr to fs mount struct */ 120 struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */ 121 int64_t t_icount_delta; /* superblock icount change */ 122 int64_t t_ifree_delta; /* superblock ifree change */ 123 int64_t t_fdblocks_delta; /* superblock fdblocks chg */ 124 int64_t t_res_fdblocks_delta; /* on-disk only chg */ 125 int64_t t_frextents_delta;/* superblock freextents chg*/ 126 int64_t t_res_frextents_delta; /* on-disk only chg */ 127 #if defined(DEBUG) || defined(XFS_WARN) 128 int64_t t_ag_freeblks_delta; /* debugging counter */ 129 int64_t t_ag_flist_delta; /* debugging counter */ 130 int64_t t_ag_btree_delta; /* debugging counter */ 131 #endif 132 int64_t t_dblocks_delta;/* superblock dblocks change */ 133 int64_t t_agcount_delta;/* superblock agcount change */ 134 int64_t t_imaxpct_delta;/* superblock imaxpct change */ 135 int64_t t_rextsize_delta;/* superblock rextsize chg */ 136 int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */ 137 int64_t t_rblocks_delta;/* superblock rblocks change */ 138 int64_t t_rextents_delta;/* superblocks rextents chg */ 139 int64_t t_rextslog_delta;/* superblocks rextslog chg */ 140 struct list_head t_items; /* log item descriptors */ 141 struct list_head t_busy; /* list of busy extents */ 142 struct list_head t_dfops; /* deferred operations */ 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 int xfs_trans_get_buf_map(struct xfs_trans *tp, struct xfs_buftarg *target, 173 struct xfs_buf_map *map, int nmaps, xfs_buf_flags_t flags, 174 struct xfs_buf **bpp); 175 176 static inline int 177 xfs_trans_get_buf( 178 struct xfs_trans *tp, 179 struct xfs_buftarg *target, 180 xfs_daddr_t blkno, 181 int numblks, 182 uint flags, 183 struct xfs_buf **bpp) 184 { 185 DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); 186 return xfs_trans_get_buf_map(tp, target, &map, 1, flags, bpp); 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 *); 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 bool xfs_trans_buf_is_dirty(struct xfs_buf *bp); 231 void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); 232 233 int xfs_trans_commit(struct xfs_trans *); 234 int xfs_trans_roll(struct xfs_trans **); 235 int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *); 236 void xfs_trans_cancel(xfs_trans_t *); 237 int xfs_trans_ail_init(struct xfs_mount *); 238 void xfs_trans_ail_destroy(struct xfs_mount *); 239 240 void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *, 241 enum xfs_blft); 242 void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp, 243 struct xfs_buf *src_bp); 244 245 extern kmem_zone_t *xfs_trans_zone; 246 247 #endif /* __XFS_TRANS_H__ */ 248