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

---
 syscall.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'syscall.c')

diff --git a/syscall.c b/syscall.c
index 4505c89..71a7013 100644
--- a/syscall.c
+++ b/syscall.c
@@ -228,7 +228,7 @@ sys_open(void)
     return -1;
   if((l = checkstring(arg0)) < 0)
     return -1;
-  if((ip = namei(cp->mem + arg0, 0)) == 0) {
+  if((ip = namei(cp->mem + arg0, NAMEI_LOOKUP, 0)) == 0) {
     if (arg1 & O_CREATE) {
       if (l >= DIRSIZ)
 	return -1;
@@ -356,7 +356,7 @@ sys_exec(void)
     return -1;
   if(checkstring(arg0) < 0)
     return -1;
-  ip = namei(cp->mem + arg0, 0);
+  ip = namei(cp->mem + arg0, NAMEI_LOOKUP, 0);
   if(ip == 0)
     return -1;
 
@@ -494,7 +494,7 @@ sys_block(void)
           ip->type, ip->nlink, ip->size, ip->addrs[0]);
   iput(ip);
 
-  ip = namei(".././//./../usertests", 0);
+  ip = namei(".././//./../usertests", NAMEI_LOOKUP, 0);
   if(ip){
     cprintf("namei(usertests): %d %d %d %d %d %d %d %d\n",
             ip->dev, ip->inum, ip->count, ip->busy,
-- 
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