xfs: remove the inode log format from the inode log item

No need to keep the inode log format around all the time, we can
easily generate it at iop_format time.

Signed-off-by: Christoph Hellwig <[e-mail]>
Reviewed-by: Dave Chinner <[e-mail]>
Signed-off-by: Dave Chinner <[e-mail]>

fs/xfs/xfs_inode_item.c

···
 	struct xfs_inode_log_format *ilf;
 	struct xfs_log_iovec	*vecp = NULL;
 
-	ilf = xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_IFORMAT,
-			&iip->ili_format,
-			sizeof(struct xfs_inode_log_format));
-	ilf->ilf_size = 1;
+	ilf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_IFORMAT);
+	ilf->ilf_type = XFS_LI_INODE;
+	ilf->ilf_ino = ip->i_ino;
+	ilf->ilf_blkno = ip->i_imap.im_blkno;
+	ilf->ilf_len = ip->i_imap.im_len;
+	ilf->ilf_boffset = ip->i_imap.im_boffset;
+	ilf->ilf_fields = XFS_ILOG_CORE;
+	ilf->ilf_size = 2; /* format + core */
+	xlog_finish_iovec(lv, vecp, sizeof(struct xfs_inode_log_format));
 
 	if (ip->i_d.di_version == 1)
 		xfs_inode_item_format_v1_inode(ip);
 	xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ICORE,
 			&ip->i_d,
 			xfs_icdinode_size(ip->i_d.di_version));
-	ilf->ilf_size++;
 
 	xfs_inode_item_format_data_fork(iip, ilf, lv, &vecp);
 	if (XFS_IFORK_Q(ip)) {
···
 			~(XFS_ILOG_ADATA | XFS_ILOG_ABROOT | XFS_ILOG_AEXT);
 	}
 
-	/*
-	 * Now update the log format that goes out to disk from the in-core
-	 * values.  We always write the inode core to make the arithmetic
-	 * games in recovery easier, which isn't a big deal as just about any
-	 * transaction would dirty it anyway.
-	 */
-	iip->ili_format.ilf_fields = XFS_ILOG_CORE |
-		(iip->ili_fields & ~XFS_ILOG_TIMESTAMP);
+	/* update the format with the exact fields we actually logged */
+	ilf->ilf_fields |= (iip->ili_fields & ~XFS_ILOG_TIMESTAMP);
 }
 
 /*
···
 	iip->ili_inode = ip;
 	xfs_log_item_init(mp, &iip->ili_item, XFS_LI_INODE,
 						&xfs_inode_item_ops);
-	iip->ili_format.ilf_type = XFS_LI_INODE;
-	iip->ili_format.ilf_ino = ip->i_ino;
-	iip->ili_format.ilf_blkno = ip->i_imap.im_blkno;
-	iip->ili_format.ilf_len = ip->i_imap.im_len;
-	iip->ili_format.ilf_boffset = ip->i_imap.im_boffset;
 }
 
 /*

fs/xfs/xfs_inode_item.h

···
 	unsigned short		ili_logged;	   /* flushed logged data */
 	unsigned int		ili_last_fields;   /* fields when flushed */
 	unsigned int		ili_fields;	   /* fields to be logged */
-	xfs_inode_log_format_t	ili_format;	   /* logged structure */
 } xfs_inode_log_item_t;
 
 static inline int xfs_inode_clean(xfs_inode_t *ip)