From 211ff0c67ea6737853cf932313cf4e27cc15f55c Mon Sep 17 00:00:00 2001
From: rtm <rtm>
Date: Sun, 13 Aug 2006 12:22:44 +0000
Subject: 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

---
 Notes | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'Notes')

diff --git a/Notes b/Notes
index 386bc2f..4bb9552 100644
--- a/Notes
+++ b/Notes
@@ -365,3 +365,18 @@ two bugs in unlink: don't just return if nlink > 0,
   and search for name, not inum
 is there a create/create race for same file name?
   resulting in two entries w/ same name in directory?
+
+namei
+  return just inode
+  return offset in dir where found, w/ dir locked, for unlink
+  return dir locked, for mknod
+
+is the offset alone useful? how do I read/write it?
+
+test: one process unlinks a file while another links to it
+test: simultaneous create of same file
+test: one process opens a file while another deletes it
+
+oy, mkfs wants dir size to be last written entry, but i
+  want it to be nblocks*512
+  maybe fix kernel code to handle former
-- 
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