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-rw-r--r--fs/xfs/xfs_trans.h304
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diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
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index 000000000..558197859
--- /dev/null
+++ b/fs/xfs/xfs_trans.h
@@ -0,0 +1,304 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ */
+#ifndef __XFS_TRANS_H__
+#define __XFS_TRANS_H__
+
+/* kernel only transaction subsystem defines */
+
+struct xlog;
+struct xfs_buf;
+struct xfs_buftarg;
+struct xfs_efd_log_item;
+struct xfs_efi_log_item;
+struct xfs_inode;
+struct xfs_item_ops;
+struct xfs_log_iovec;
+struct xfs_mount;
+struct xfs_trans;
+struct xfs_trans_res;
+struct xfs_dquot_acct;
+struct xfs_rud_log_item;
+struct xfs_rui_log_item;
+struct xfs_btree_cur;
+struct xfs_cui_log_item;
+struct xfs_cud_log_item;
+struct xfs_bui_log_item;
+struct xfs_bud_log_item;
+
+struct xfs_log_item {
+ struct list_head li_ail; /* AIL pointers */
+ struct list_head li_trans; /* transaction list */
+ xfs_lsn_t li_lsn; /* last on-disk lsn */
+ struct xlog *li_log;
+ struct xfs_ail *li_ailp; /* ptr to AIL */
+ uint li_type; /* item type */
+ unsigned long li_flags; /* misc flags */
+ struct xfs_buf *li_buf; /* real buffer pointer */
+ struct list_head li_bio_list; /* buffer item list */
+ const struct xfs_item_ops *li_ops; /* function list */
+
+ /* delayed logging */
+ struct list_head li_cil; /* CIL pointers */
+ struct xfs_log_vec *li_lv; /* active log vector */
+ struct xfs_log_vec *li_lv_shadow; /* standby vector */
+ xfs_csn_t li_seq; /* CIL commit seq */
+ uint32_t li_order_id; /* CIL commit order */
+};
+
+/*
+ * li_flags use the (set/test/clear)_bit atomic interfaces because updates can
+ * race with each other and we don't want to have to use the AIL lock to
+ * serialise all updates.
+ */
+#define XFS_LI_IN_AIL 0
+#define XFS_LI_ABORTED 1
+#define XFS_LI_FAILED 2
+#define XFS_LI_DIRTY 3
+#define XFS_LI_WHITEOUT 4
+
+#define XFS_LI_FLAGS \
+ { (1u << XFS_LI_IN_AIL), "IN_AIL" }, \
+ { (1u << XFS_LI_ABORTED), "ABORTED" }, \
+ { (1u << XFS_LI_FAILED), "FAILED" }, \
+ { (1u << XFS_LI_DIRTY), "DIRTY" }, \
+ { (1u << XFS_LI_WHITEOUT), "WHITEOUT" }
+
+struct xfs_item_ops {
+ unsigned flags;
+ void (*iop_size)(struct xfs_log_item *, int *, int *);
+ void (*iop_format)(struct xfs_log_item *, struct xfs_log_vec *);
+ void (*iop_pin)(struct xfs_log_item *);
+ void (*iop_unpin)(struct xfs_log_item *, int remove);
+ uint64_t (*iop_sort)(struct xfs_log_item *lip);
+ int (*iop_precommit)(struct xfs_trans *tp, struct xfs_log_item *lip);
+ void (*iop_committing)(struct xfs_log_item *lip, xfs_csn_t seq);
+ xfs_lsn_t (*iop_committed)(struct xfs_log_item *, xfs_lsn_t);
+ uint (*iop_push)(struct xfs_log_item *, struct list_head *);
+ void (*iop_release)(struct xfs_log_item *);
+ int (*iop_recover)(struct xfs_log_item *lip,
+ struct list_head *capture_list);
+ bool (*iop_match)(struct xfs_log_item *item, uint64_t id);
+ struct xfs_log_item *(*iop_relog)(struct xfs_log_item *intent,
+ struct xfs_trans *tp);
+ struct xfs_log_item *(*iop_intent)(struct xfs_log_item *intent_done);
+};
+
+/*
+ * Log item ops flags
+ */
+/*
+ * Release the log item when the journal commits instead of inserting into the
+ * AIL for writeback tracking and/or log tail pinning.
+ */
+#define XFS_ITEM_RELEASE_WHEN_COMMITTED (1 << 0)
+#define XFS_ITEM_INTENT (1 << 1)
+#define XFS_ITEM_INTENT_DONE (1 << 2)
+
+static inline bool
+xlog_item_is_intent(struct xfs_log_item *lip)
+{
+ return lip->li_ops->flags & XFS_ITEM_INTENT;
+}
+
+static inline bool
+xlog_item_is_intent_done(struct xfs_log_item *lip)
+{
+ return lip->li_ops->flags & XFS_ITEM_INTENT_DONE;
+}
+
+void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item,
+ int type, const struct xfs_item_ops *ops);
+
+/*
+ * Return values for the iop_push() routines.
+ */
+#define XFS_ITEM_SUCCESS 0
+#define XFS_ITEM_PINNED 1
+#define XFS_ITEM_LOCKED 2
+#define XFS_ITEM_FLUSHING 3
+
+/*
+ * This is the structure maintained for every active transaction.
+ */
+typedef struct xfs_trans {
+ unsigned int t_magic; /* magic number */
+ unsigned int t_log_res; /* amt of log space resvd */
+ unsigned int t_log_count; /* count for perm log res */
+ unsigned int t_blk_res; /* # of blocks resvd */
+ unsigned int t_blk_res_used; /* # of resvd blocks used */
+ unsigned int t_rtx_res; /* # of rt extents resvd */
+ unsigned int t_rtx_res_used; /* # of resvd rt extents used */
+ unsigned int t_flags; /* misc flags */
+ xfs_fsblock_t t_firstblock; /* first block allocated */
+ struct xlog_ticket *t_ticket; /* log mgr ticket */
+ struct xfs_mount *t_mountp; /* ptr to fs mount struct */
+ struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */
+ int64_t t_icount_delta; /* superblock icount change */
+ int64_t t_ifree_delta; /* superblock ifree change */
+ int64_t t_fdblocks_delta; /* superblock fdblocks chg */
+ int64_t t_res_fdblocks_delta; /* on-disk only chg */
+ int64_t t_frextents_delta;/* superblock freextents chg*/
+ int64_t t_res_frextents_delta; /* on-disk only chg */
+ int64_t t_dblocks_delta;/* superblock dblocks change */
+ int64_t t_agcount_delta;/* superblock agcount change */
+ int64_t t_imaxpct_delta;/* superblock imaxpct change */
+ int64_t t_rextsize_delta;/* superblock rextsize chg */
+ int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */
+ int64_t t_rblocks_delta;/* superblock rblocks change */
+ int64_t t_rextents_delta;/* superblocks rextents chg */
+ int64_t t_rextslog_delta;/* superblocks rextslog chg */
+ struct list_head t_items; /* log item descriptors */
+ struct list_head t_busy; /* list of busy extents */
+ struct list_head t_dfops; /* deferred operations */
+ unsigned long t_pflags; /* saved process flags state */
+} xfs_trans_t;
+
+/*
+ * XFS transaction mechanism exported interfaces that are
+ * actually macros.
+ */
+#define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC)
+
+/*
+ * XFS transaction mechanism exported interfaces.
+ */
+int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp,
+ uint blocks, uint rtextents, uint flags,
+ struct xfs_trans **tpp);
+int xfs_trans_alloc_empty(struct xfs_mount *mp,
+ struct xfs_trans **tpp);
+void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
+
+int xfs_trans_get_buf_map(struct xfs_trans *tp, struct xfs_buftarg *target,
+ struct xfs_buf_map *map, int nmaps, xfs_buf_flags_t flags,
+ struct xfs_buf **bpp);
+
+static inline int
+xfs_trans_get_buf(
+ struct xfs_trans *tp,
+ struct xfs_buftarg *target,
+ xfs_daddr_t blkno,
+ int numblks,
+ xfs_buf_flags_t flags,
+ struct xfs_buf **bpp)
+{
+ DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
+ return xfs_trans_get_buf_map(tp, target, &map, 1, flags, bpp);
+}
+
+int xfs_trans_read_buf_map(struct xfs_mount *mp,
+ struct xfs_trans *tp,
+ struct xfs_buftarg *target,
+ struct xfs_buf_map *map, int nmaps,
+ xfs_buf_flags_t flags,
+ struct xfs_buf **bpp,
+ const struct xfs_buf_ops *ops);
+
+static inline int
+xfs_trans_read_buf(
+ struct xfs_mount *mp,
+ struct xfs_trans *tp,
+ struct xfs_buftarg *target,
+ xfs_daddr_t blkno,
+ int numblks,
+ xfs_buf_flags_t flags,
+ struct xfs_buf **bpp,
+ const struct xfs_buf_ops *ops)
+{
+ DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
+ return xfs_trans_read_buf_map(mp, tp, target, &map, 1,
+ flags, bpp, ops);
+}
+
+struct xfs_buf *xfs_trans_getsb(struct xfs_trans *);
+
+void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
+void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
+void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
+void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
+void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
+void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
+void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
+bool xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *);
+void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
+void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
+void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
+void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
+void xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint,
+ uint);
+void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *);
+bool xfs_trans_buf_is_dirty(struct xfs_buf *bp);
+void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
+
+int xfs_trans_commit(struct xfs_trans *);
+int xfs_trans_roll(struct xfs_trans **);
+int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *);
+void xfs_trans_cancel(xfs_trans_t *);
+int xfs_trans_ail_init(struct xfs_mount *);
+void xfs_trans_ail_destroy(struct xfs_mount *);
+
+void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *,
+ enum xfs_blft);
+void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp,
+ struct xfs_buf *src_bp);
+
+extern struct kmem_cache *xfs_trans_cache;
+
+static inline struct xfs_log_item *
+xfs_trans_item_relog(
+ struct xfs_log_item *lip,
+ struct xfs_trans *tp)
+{
+ return lip->li_ops->iop_relog(lip, tp);
+}
+
+struct xfs_dquot;
+
+int xfs_trans_alloc_inode(struct xfs_inode *ip, struct xfs_trans_res *resv,
+ unsigned int dblocks, unsigned int rblocks, bool force,
+ struct xfs_trans **tpp);
+int xfs_trans_alloc_icreate(struct xfs_mount *mp, struct xfs_trans_res *resv,
+ struct xfs_dquot *udqp, struct xfs_dquot *gdqp,
+ struct xfs_dquot *pdqp, unsigned int dblocks,
+ struct xfs_trans **tpp);
+int xfs_trans_alloc_ichange(struct xfs_inode *ip, struct xfs_dquot *udqp,
+ struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, bool force,
+ struct xfs_trans **tpp);
+int xfs_trans_alloc_dir(struct xfs_inode *dp, struct xfs_trans_res *resv,
+ struct xfs_inode *ip, unsigned int *dblocks,
+ struct xfs_trans **tpp, int *nospace_error);
+
+static inline void
+xfs_trans_set_context(
+ struct xfs_trans *tp)
+{
+ ASSERT(current->journal_info == NULL);
+ tp->t_pflags = memalloc_nofs_save();
+ current->journal_info = tp;
+}
+
+static inline void
+xfs_trans_clear_context(
+ struct xfs_trans *tp)
+{
+ if (current->journal_info == tp) {
+ memalloc_nofs_restore(tp->t_pflags);
+ current->journal_info = NULL;
+ }
+}
+
+static inline void
+xfs_trans_switch_context(
+ struct xfs_trans *old_tp,
+ struct xfs_trans *new_tp)
+{
+ ASSERT(current->journal_info == old_tp);
+ new_tp->t_pflags = old_tp->t_pflags;
+ old_tp->t_pflags = 0;
+ current->journal_info = new_tp;
+}
+
+#endif /* __XFS_TRANS_H__ */