[RFC 07/17] xfs: (parent ptr) add parent pointer support to xfs_create

[Mark Tinguely <tinguely@sgi.com>]

[-- Attachment #1: 07-pptr-add-to-xfs_create.patch --]
[-- Type: text/plain, Size: 1282 bytes --]

Add the parent inode / entry offset into the parent inode entries
when creating a new file or directory. The first entry will always
go into the inode.

---
 fs/xfs/xfs_inode.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

Index: b/fs/xfs/xfs_inode.c
===================================================================
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1163,6 +1163,7 @@ xfs_create(
 	struct xfs_dquot	*pdqp = NULL;
 	struct xfs_trans_res	tres;
 	uint			resblks;
+	uint			offset;
 
 	trace_xfs_create(dp, name);
 
@@ -1265,11 +1266,17 @@ xfs_create(
 	error = xfs_dir_createname(tp, dp, name, ip->i_ino,
 					&first_block, &free_list, resblks ?
 					resblks - XFS_IALLOC_SPACE_RES(mp) : 0,
-					NULL);
+					&offset);
 	if (error) {
 		ASSERT(error != ENOSPC);
 		goto out_trans_abort;
 	}
+
+	if (xfs_sb_version_hasparent(&mp->m_sb)) {
+		/* set the parent pointer and offset to the inode core fields */
+		ip->i_d.di_parent = cpu_to_be64(dp->i_ino);
+		ip->i_d.di_poffset = cpu_to_be32(offset);
+	}
 	xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
 	xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
 


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