namei returns locked parent dir inode for create / unlink

don't hold fd table lock across idecref() (latter does block i/o)
idecref calls iput() in case last ref -> freeing inode
dir size is 512 * # blocks, so readi/writei &c work
unlink deletes dirent even if ip->nlink > 0

1 files changed, 4 insertions, 0 deletions

diff --git a/fsvar.h b/fsvar.h
index ef678dd..6f4e68a 100644
--- a/fsvar.h
+++ b/fsvar.h
@@ -14,3 +14,7 @@ struct inode {
 };
 
 extern uint rootdev;
+
+#define NAMEI_LOOKUP 1
+#define NAMEI_CREATE 2
+#define NAMEI_DELETE 3