xfs: separate icreate log format definitions from xfs_icreate_item.h

The on disk log format definitions for the icreate log item are
intertwined with the kernel-only in-memory log item definitions.
Separate the log format definitions out into their own header file
so they can easily be shared with userspace.

Signed-off-by: Dave Chinner <[e-mail]>
Reviewed-by: Brian Foster <[e-mail]>
Reviewed-by: Mark Tinguely <[e-mail]>
Signed-off-by: Ben Myers <[e-mail]>

fs/xfs/xfs_icreate_item.h

···
 #ifndef XFS_ICREATE_ITEM_H
 #define XFS_ICREATE_ITEM_H	1
 
-/*
- * on disk log item structure
- *
- * Log recovery assumes the first two entries are the type and size and they fit
- * in 32 bits. Also in host order (ugh) so they have to be 32 bit aligned so
- * decoding can be done correctly.
- */
-struct xfs_icreate_log {
-	__uint16_t	icl_type;	/* type of log format structure */
-	__uint16_t	icl_size;	/* size of log format structure */
-	__be32		icl_ag;		/* ag being allocated in */
-	__be32		icl_agbno;	/* start block of inode range */
-	__be32		icl_count;	/* number of inodes to initialise */
-	__be32		icl_isize;	/* size of inodes */
-	__be32		icl_length;	/* length of extent to initialise */
-	__be32		icl_gen;	/* inode generation number to use */
-};
-
 /* in memory log item structure */
 struct xfs_icreate_item {
 	struct xfs_log_item	ic_item;

fs/xfs/xfs_log_format.h

···
 #define XFS_ALL_QUOTA_CHKD	\
 		(XFS_UQUOTA_CHKD | XFS_GQUOTA_CHKD | XFS_PQUOTA_CHKD)
 
+/*
+ * Inode create log item structure
+ *
+ * Log recovery assumes the first two entries are the type and size and they fit
+ * in 32 bits. Also in host order (ugh) so they have to be 32 bit aligned so
+ * decoding can be done correctly.
+ */
+struct xfs_icreate_log {
+	__uint16_t	icl_type;	/* type of log format structure */
+	__uint16_t	icl_size;	/* size of log format structure */
+	__be32		icl_ag;		/* ag being allocated in */
+	__be32		icl_agbno;	/* start block of inode range */
+	__be32		icl_count;	/* number of inodes to initialise */
+	__be32		icl_isize;	/* size of inodes */
+	__be32		icl_length;	/* length of extent to initialise */
+	__be32		icl_gen;	/* inode generation number to use */
+};
+
 #endif /* __XFS_LOG_FORMAT_H__ */