xfs_trans.h (9963B)
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 11struct xlog; 12struct xfs_buf; 13struct xfs_buftarg; 14struct xfs_efd_log_item; 15struct xfs_efi_log_item; 16struct xfs_inode; 17struct xfs_item_ops; 18struct xfs_log_iovec; 19struct xfs_mount; 20struct xfs_trans; 21struct xfs_trans_res; 22struct xfs_dquot_acct; 23struct xfs_rud_log_item; 24struct xfs_rui_log_item; 25struct xfs_btree_cur; 26struct xfs_cui_log_item; 27struct xfs_cud_log_item; 28struct xfs_bui_log_item; 29struct xfs_bud_log_item; 30 31struct xfs_log_item { 32 struct list_head li_ail; /* AIL pointers */ 33 struct list_head li_trans; /* transaction list */ 34 xfs_lsn_t li_lsn; /* last on-disk lsn */ 35 struct xlog *li_log; 36 struct xfs_ail *li_ailp; /* ptr to AIL */ 37 uint li_type; /* item type */ 38 unsigned long li_flags; /* misc flags */ 39 struct xfs_buf *li_buf; /* real buffer pointer */ 40 struct list_head li_bio_list; /* buffer item list */ 41 const struct xfs_item_ops *li_ops; /* function list */ 42 43 /* delayed logging */ 44 struct list_head li_cil; /* CIL pointers */ 45 struct xfs_log_vec *li_lv; /* active log vector */ 46 struct xfs_log_vec *li_lv_shadow; /* standby vector */ 47 xfs_csn_t li_seq; /* CIL commit seq */ 48}; 49 50/* 51 * li_flags use the (set/test/clear)_bit atomic interfaces because updates can 52 * race with each other and we don't want to have to use the AIL lock to 53 * serialise all updates. 54 */ 55#define XFS_LI_IN_AIL 0 56#define XFS_LI_ABORTED 1 57#define XFS_LI_FAILED 2 58#define XFS_LI_DIRTY 3 59#define XFS_LI_WHITEOUT 4 60 61#define XFS_LI_FLAGS \ 62 { (1u << XFS_LI_IN_AIL), "IN_AIL" }, \ 63 { (1u << XFS_LI_ABORTED), "ABORTED" }, \ 64 { (1u << XFS_LI_FAILED), "FAILED" }, \ 65 { (1u << XFS_LI_DIRTY), "DIRTY" }, \ 66 { (1u << XFS_LI_WHITEOUT), "WHITEOUT" } 67 68struct xfs_item_ops { 69 unsigned flags; 70 void (*iop_size)(struct xfs_log_item *, int *, int *); 71 void (*iop_format)(struct xfs_log_item *, struct xfs_log_vec *); 72 void (*iop_pin)(struct xfs_log_item *); 73 void (*iop_unpin)(struct xfs_log_item *, int remove); 74 uint (*iop_push)(struct xfs_log_item *, struct list_head *); 75 void (*iop_committing)(struct xfs_log_item *lip, xfs_csn_t seq); 76 void (*iop_release)(struct xfs_log_item *); 77 xfs_lsn_t (*iop_committed)(struct xfs_log_item *, xfs_lsn_t); 78 int (*iop_recover)(struct xfs_log_item *lip, 79 struct list_head *capture_list); 80 bool (*iop_match)(struct xfs_log_item *item, uint64_t id); 81 struct xfs_log_item *(*iop_relog)(struct xfs_log_item *intent, 82 struct xfs_trans *tp); 83 struct xfs_log_item *(*iop_intent)(struct xfs_log_item *intent_done); 84}; 85 86/* 87 * Log item ops flags 88 */ 89/* 90 * Release the log item when the journal commits instead of inserting into the 91 * AIL for writeback tracking and/or log tail pinning. 92 */ 93#define XFS_ITEM_RELEASE_WHEN_COMMITTED (1 << 0) 94#define XFS_ITEM_INTENT (1 << 1) 95#define XFS_ITEM_INTENT_DONE (1 << 2) 96 97static inline bool 98xlog_item_is_intent(struct xfs_log_item *lip) 99{ 100 return lip->li_ops->flags & XFS_ITEM_INTENT; 101} 102 103static inline bool 104xlog_item_is_intent_done(struct xfs_log_item *lip) 105{ 106 return lip->li_ops->flags & XFS_ITEM_INTENT_DONE; 107} 108 109void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item, 110 int type, const struct xfs_item_ops *ops); 111 112/* 113 * Return values for the iop_push() routines. 114 */ 115#define XFS_ITEM_SUCCESS 0 116#define XFS_ITEM_PINNED 1 117#define XFS_ITEM_LOCKED 2 118#define XFS_ITEM_FLUSHING 3 119 120/* 121 * This is the structure maintained for every active transaction. 122 */ 123typedef struct xfs_trans { 124 unsigned int t_magic; /* magic number */ 125 unsigned int t_log_res; /* amt of log space resvd */ 126 unsigned int t_log_count; /* count for perm log res */ 127 unsigned int t_blk_res; /* # of blocks resvd */ 128 unsigned int t_blk_res_used; /* # of resvd blocks used */ 129 unsigned int t_rtx_res; /* # of rt extents resvd */ 130 unsigned int t_rtx_res_used; /* # of resvd rt extents used */ 131 unsigned int t_flags; /* misc flags */ 132 xfs_fsblock_t t_firstblock; /* first block allocated */ 133 struct xlog_ticket *t_ticket; /* log mgr ticket */ 134 struct xfs_mount *t_mountp; /* ptr to fs mount struct */ 135 struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */ 136 int64_t t_icount_delta; /* superblock icount change */ 137 int64_t t_ifree_delta; /* superblock ifree change */ 138 int64_t t_fdblocks_delta; /* superblock fdblocks chg */ 139 int64_t t_res_fdblocks_delta; /* on-disk only chg */ 140 int64_t t_frextents_delta;/* superblock freextents chg*/ 141 int64_t t_res_frextents_delta; /* on-disk only chg */ 142 int64_t t_dblocks_delta;/* superblock dblocks change */ 143 int64_t t_agcount_delta;/* superblock agcount change */ 144 int64_t t_imaxpct_delta;/* superblock imaxpct change */ 145 int64_t t_rextsize_delta;/* superblock rextsize chg */ 146 int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */ 147 int64_t t_rblocks_delta;/* superblock rblocks change */ 148 int64_t t_rextents_delta;/* superblocks rextents chg */ 149 int64_t t_rextslog_delta;/* superblocks rextslog chg */ 150 struct list_head t_items; /* log item descriptors */ 151 struct list_head t_busy; /* list of busy extents */ 152 struct list_head t_dfops; /* deferred operations */ 153 unsigned long t_pflags; /* saved process flags state */ 154} xfs_trans_t; 155 156/* 157 * XFS transaction mechanism exported interfaces that are 158 * actually macros. 159 */ 160#define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC) 161 162/* 163 * XFS transaction mechanism exported interfaces. 164 */ 165int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp, 166 uint blocks, uint rtextents, uint flags, 167 struct xfs_trans **tpp); 168int xfs_trans_alloc_empty(struct xfs_mount *mp, 169 struct xfs_trans **tpp); 170void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t); 171 172int 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 176static inline int 177xfs_trans_get_buf( 178 struct xfs_trans *tp, 179 struct xfs_buftarg *target, 180 xfs_daddr_t blkno, 181 int numblks, 182 xfs_buf_flags_t 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 189int 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 197static inline int 198xfs_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 213struct xfs_buf *xfs_trans_getsb(struct xfs_trans *); 214 215void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *); 216void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *); 217void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *); 218void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *); 219void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *); 220void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *); 221void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *); 222bool xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *); 223void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint); 224void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *); 225void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int); 226void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint); 227void xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint, 228 uint); 229void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *); 230bool xfs_trans_buf_is_dirty(struct xfs_buf *bp); 231void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); 232 233int xfs_trans_commit(struct xfs_trans *); 234int xfs_trans_roll(struct xfs_trans **); 235int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *); 236void xfs_trans_cancel(xfs_trans_t *); 237int xfs_trans_ail_init(struct xfs_mount *); 238void xfs_trans_ail_destroy(struct xfs_mount *); 239 240void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *, 241 enum xfs_blft); 242void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp, 243 struct xfs_buf *src_bp); 244 245extern struct kmem_cache *xfs_trans_cache; 246 247static inline struct xfs_log_item * 248xfs_trans_item_relog( 249 struct xfs_log_item *lip, 250 struct xfs_trans *tp) 251{ 252 return lip->li_ops->iop_relog(lip, tp); 253} 254 255struct xfs_dquot; 256 257int xfs_trans_alloc_inode(struct xfs_inode *ip, struct xfs_trans_res *resv, 258 unsigned int dblocks, unsigned int rblocks, bool force, 259 struct xfs_trans **tpp); 260int xfs_trans_alloc_icreate(struct xfs_mount *mp, struct xfs_trans_res *resv, 261 struct xfs_dquot *udqp, struct xfs_dquot *gdqp, 262 struct xfs_dquot *pdqp, unsigned int dblocks, 263 struct xfs_trans **tpp); 264int xfs_trans_alloc_ichange(struct xfs_inode *ip, struct xfs_dquot *udqp, 265 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, bool force, 266 struct xfs_trans **tpp); 267int xfs_trans_alloc_dir(struct xfs_inode *dp, struct xfs_trans_res *resv, 268 struct xfs_inode *ip, unsigned int *dblocks, 269 struct xfs_trans **tpp, int *nospace_error); 270 271static inline void 272xfs_trans_set_context( 273 struct xfs_trans *tp) 274{ 275 ASSERT(current->journal_info == NULL); 276 tp->t_pflags = memalloc_nofs_save(); 277 current->journal_info = tp; 278} 279 280static inline void 281xfs_trans_clear_context( 282 struct xfs_trans *tp) 283{ 284 if (current->journal_info == tp) { 285 memalloc_nofs_restore(tp->t_pflags); 286 current->journal_info = NULL; 287 } 288} 289 290static inline void 291xfs_trans_switch_context( 292 struct xfs_trans *old_tp, 293 struct xfs_trans *new_tp) 294{ 295 ASSERT(current->journal_info == old_tp); 296 new_tp->t_pflags = old_tp->t_pflags; 297 old_tp->t_pflags = 0; 298 current->journal_info = new_tp; 299} 300 301#endif /* __XFS_TRANS_H__ */