Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 283 insertions, 0 deletions

diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
new file mode 100644
index 000000000..c3d278e96
--- /dev/null
+++ b/fs/xfs/xfs_trans.h
@@ -0,0 +1,283 @@
+// 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 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;
+
+typedef 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 xfs_mount		*li_mountp;	/* ptr to fs mount */
+	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 */
+	void				(*li_cb)(struct xfs_buf *,
+						 struct xfs_log_item *);
+							/* buffer item iodone */
+							/* callback func */
+	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_lsn_t			li_seq;		/* CIL commit seq */
+} xfs_log_item_t;
+
+/*
+ * 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	/* log item dirty in transaction */
+
+#define XFS_LI_FLAGS \
+	{ (1 << XFS_LI_IN_AIL),		"IN_AIL" }, \
+	{ (1 << XFS_LI_ABORTED),	"ABORTED" }, \
+	{ (1 << XFS_LI_FAILED),		"FAILED" }, \
+	{ (1 << XFS_LI_DIRTY),		"DIRTY" }
+
+struct xfs_item_ops {
+	void (*iop_size)(xfs_log_item_t *, int *, int *);
+	void (*iop_format)(xfs_log_item_t *, struct xfs_log_vec *);
+	void (*iop_pin)(xfs_log_item_t *);
+	void (*iop_unpin)(xfs_log_item_t *, int remove);
+	uint (*iop_push)(struct xfs_log_item *, struct list_head *);
+	void (*iop_unlock)(xfs_log_item_t *);
+	xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
+	void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);
+	void (*iop_error)(xfs_log_item_t *, xfs_buf_t *);
+};
+
+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
+
+/*
+ * Deferred operation item relogging limits.
+ */
+#define XFS_DEFER_OPS_NR_INODES	2	/* join up to two inodes */
+#define XFS_DEFER_OPS_NR_BUFS	2	/* join up to two buffers */
+
+/*
+ * 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 */
+#if defined(DEBUG) || defined(XFS_WARN)
+	int64_t			t_ag_freeblks_delta; /* debugging counter */
+	int64_t			t_ag_flist_delta; /* debugging counter */
+	int64_t			t_ag_btree_delta; /* debugging counter */
+#endif
+	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)
+
+#if defined(DEBUG) || defined(XFS_WARN)
+#define	xfs_trans_agblocks_delta(tp, d)	((tp)->t_ag_freeblks_delta += (int64_t)d)
+#define	xfs_trans_agflist_delta(tp, d)	((tp)->t_ag_flist_delta += (int64_t)d)
+#define	xfs_trans_agbtree_delta(tp, d)	((tp)->t_ag_btree_delta += (int64_t)d)
+#else
+#define	xfs_trans_agblocks_delta(tp, d)
+#define	xfs_trans_agflist_delta(tp, d)
+#define	xfs_trans_agbtree_delta(tp, d)
+#endif
+
+/*
+ * 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);
+
+struct xfs_buf	*xfs_trans_get_buf_map(struct xfs_trans *tp,
+				       struct xfs_buftarg *target,
+				       struct xfs_buf_map *map, int nmaps,
+				       uint flags);
+
+static inline struct xfs_buf *
+xfs_trans_get_buf(
+	struct xfs_trans	*tp,
+	struct xfs_buftarg	*target,
+	xfs_daddr_t		blkno,
+	int			numblks,
+	uint			flags)
+{
+	DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
+	return xfs_trans_get_buf_map(tp, target, &map, 1, flags);
+}
+
+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(xfs_trans_t *, struct xfs_mount *, int);
+
+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 *);
+void		xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
+
+void		xfs_extent_free_init_defer_op(void);
+struct xfs_efd_log_item	*xfs_trans_get_efd(struct xfs_trans *,
+				  struct xfs_efi_log_item *,
+				  uint);
+int		xfs_trans_free_extent(struct xfs_trans *,
+				      struct xfs_efd_log_item *, xfs_fsblock_t,
+				      xfs_extlen_t, struct xfs_owner_info *,
+				      bool);
+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 kmem_zone_t	*xfs_trans_zone;
+
+/* rmap updates */
+enum xfs_rmap_intent_type;
+
+void xfs_rmap_update_init_defer_op(void);
+struct xfs_rud_log_item *xfs_trans_get_rud(struct xfs_trans *tp,
+		struct xfs_rui_log_item *ruip);
+int xfs_trans_log_finish_rmap_update(struct xfs_trans *tp,
+		struct xfs_rud_log_item *rudp, enum xfs_rmap_intent_type type,
+		uint64_t owner, int whichfork, xfs_fileoff_t startoff,
+		xfs_fsblock_t startblock, xfs_filblks_t blockcount,
+		xfs_exntst_t state, struct xfs_btree_cur **pcur);
+
+/* refcount updates */
+enum xfs_refcount_intent_type;
+
+void xfs_refcount_update_init_defer_op(void);
+struct xfs_cud_log_item *xfs_trans_get_cud(struct xfs_trans *tp,
+		struct xfs_cui_log_item *cuip);
+int xfs_trans_log_finish_refcount_update(struct xfs_trans *tp,
+		struct xfs_cud_log_item *cudp,
+		enum xfs_refcount_intent_type type, xfs_fsblock_t startblock,
+		xfs_extlen_t blockcount, xfs_fsblock_t *new_fsb,
+		xfs_extlen_t *new_len, struct xfs_btree_cur **pcur);
+
+/* mapping updates */
+enum xfs_bmap_intent_type;
+
+void xfs_bmap_update_init_defer_op(void);
+struct xfs_bud_log_item *xfs_trans_get_bud(struct xfs_trans *tp,
+		struct xfs_bui_log_item *buip);
+int xfs_trans_log_finish_bmap_update(struct xfs_trans *tp,
+		struct xfs_bud_log_item *rudp, enum xfs_bmap_intent_type type,
+		struct xfs_inode *ip, int whichfork, xfs_fileoff_t startoff,
+		xfs_fsblock_t startblock, xfs_filblks_t *blockcount,
+		xfs_exntst_t state);
+
+#endif	/* __XFS_TRANS_H__ */