1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (c) 2000,2005 Silicon Graphics, Inc.
4  * All Rights Reserved.
5  */
6 #ifndef	__XFS_INODE_ITEM_H__
7 #define	__XFS_INODE_ITEM_H__
8 
9 /* kernel only definitions */
10 
11 struct xfs_buf;
12 struct xfs_bmbt_rec;
13 struct xfs_inode;
14 struct xfs_mount;
15 
16 struct xfs_inode_log_item {
17 	struct xfs_log_item	ili_item;	   /* common portion */
18 	struct xfs_inode	*ili_inode;	   /* inode ptr */
19 	unsigned short		ili_lock_flags;	   /* inode lock flags */
20 	/*
21 	 * The ili_lock protects the interactions between the dirty state and
22 	 * the flush state of the inode log item. This allows us to do atomic
23 	 * modifications of multiple state fields without having to hold a
24 	 * specific inode lock to serialise them.
25 	 *
26 	 * We need atomic changes between inode dirtying, inode flushing and
27 	 * inode completion, but these all hold different combinations of
28 	 * ILOCK and IFLUSHING and hence we need some other method of
29 	 * serialising updates to the flush state.
30 	 */
31 	spinlock_t		ili_lock;	   /* flush state lock */
32 	unsigned int		ili_last_fields;   /* fields when flushed */
33 	unsigned int		ili_fields;	   /* fields to be logged */
34 	unsigned int		ili_fsync_fields;  /* logged since last fsync */
35 	xfs_lsn_t		ili_flush_lsn;	   /* lsn at last flush */
36 	xfs_csn_t		ili_commit_seq;	   /* last transaction commit */
37 };
38 
xfs_inode_clean(struct xfs_inode * ip)39 static inline int xfs_inode_clean(struct xfs_inode *ip)
40 {
41 	return !ip->i_itemp || !(ip->i_itemp->ili_fields & XFS_ILOG_ALL);
42 }
43 
44 extern void xfs_inode_item_init(struct xfs_inode *, struct xfs_mount *);
45 extern void xfs_inode_item_destroy(struct xfs_inode *);
46 extern void xfs_iflush_abort(struct xfs_inode *);
47 extern int xfs_inode_item_format_convert(xfs_log_iovec_t *,
48 					 struct xfs_inode_log_format *);
49 
50 extern struct kmem_cache	*xfs_ili_cache;
51 
52 #endif	/* __XFS_INODE_ITEM_H__ */
53