add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/xfs/xfs_inode_item.h
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@@ -13,28 +13,37 @@
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 struct xfs_inode;
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 struct xfs_mount;
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-typedef struct xfs_inode_log_item {
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-	xfs_log_item_t		ili_item;	   /* common portion */
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+struct xfs_inode_log_item {
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+	struct xfs_log_item	ili_item;	   /* common portion */
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 	struct xfs_inode	*ili_inode;	   /* inode ptr */
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-	xfs_lsn_t		ili_flush_lsn;	   /* lsn at last flush */
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-	xfs_lsn_t		ili_last_lsn;	   /* lsn at last transaction */
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-	unsigned short		ili_lock_flags;	   /* lock flags */
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-	unsigned short		ili_logged;	   /* flushed logged data */
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+	unsigned short		ili_lock_flags;	   /* inode lock flags */
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+	/*
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+	 * The ili_lock protects the interactions between the dirty state and
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+	 * the flush state of the inode log item. This allows us to do atomic
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+	 * modifications of multiple state fields without having to hold a
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+	 * specific inode lock to serialise them.
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+	 *
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+	 * We need atomic changes between inode dirtying, inode flushing and
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+	 * inode completion, but these all hold different combinations of
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+	 * ILOCK and IFLUSHING and hence we need some other method of
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+	 * serialising updates to the flush state.
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+	 */
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+	spinlock_t		ili_lock;	   /* flush state lock */
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 	unsigned int		ili_last_fields;   /* fields when flushed */
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 	unsigned int		ili_fields;	   /* fields to be logged */
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 	unsigned int		ili_fsync_fields;  /* logged since last fsync */
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-} xfs_inode_log_item_t;
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+	xfs_lsn_t		ili_flush_lsn;	   /* lsn at last flush */
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+	xfs_csn_t		ili_commit_seq;	   /* last transaction commit */
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+};
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-static inline int xfs_inode_clean(xfs_inode_t *ip)
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+static inline int xfs_inode_clean(struct xfs_inode *ip)
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 {
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 	return !ip->i_itemp || !(ip->i_itemp->ili_fields & XFS_ILOG_ALL);
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 }
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 extern void xfs_inode_item_init(struct xfs_inode *, struct xfs_mount *);
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 extern void xfs_inode_item_destroy(struct xfs_inode *);
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-extern void xfs_iflush_done(struct xfs_buf *, struct xfs_log_item *);
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-extern void xfs_istale_done(struct xfs_buf *, struct xfs_log_item *);
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-extern void xfs_iflush_abort(struct xfs_inode *, bool);
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+extern void xfs_iflush_abort(struct xfs_inode *);
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 extern int xfs_inode_item_format_convert(xfs_log_iovec_t *,
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 					 struct xfs_inode_log_format *);
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