From 6e880ed20e91ce1f83f8493b56947ef1d13dbf0f Mon Sep 17 00:00:00 2001
From: Derrick Brashear <shadow@dementia.org>
Date: Fri, 13 Feb 2004 18:58:39 +0000
Subject: [PATCH] revert-linux-sysname-list-estale-fix-20040213

(despite just committing a leak fix) we can no longer find a kernel where this is needed so we'll leave it in the cvs history but revoke it. it may have been a "special" kernel
---
 src/afs/LINUX/osi_vnodeops.c | 47 +-----------------------------------
 1 file changed, 1 insertion(+), 46 deletions(-)

diff --git a/src/afs/LINUX/osi_vnodeops.c b/src/afs/LINUX/osi_vnodeops.c
index 7cb1db04a9..d30c6e3b52 100644
--- a/src/afs/LINUX/osi_vnodeops.c
+++ b/src/afs/LINUX/osi_vnodeops.c
@@ -1072,8 +1072,6 @@ afs_linux_create(struct inode *dip, struct dentry *dp, int mode)
     return -code;
 }
 
-#define AFS_EQ_ATSYS(name) (((name)[0]=='@')&&((name)[1]=='s')&&((name)[2]=='y')&&((name)[3]=='s')&&(!(name)[4]))
-
 /* afs_linux_lookup */
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,10)
 struct dentry *
@@ -1087,29 +1085,8 @@ afs_linux_lookup(struct inode *dip, struct dentry *dp)
     cred_t *credp = crref();
     struct vcache *vcp = NULL;
     const char *comp = dp->d_name.name;
-    char *name = NULL;
-    struct sysname_info sysState;
-    struct qstr qstr;
-    struct vrequest treq;
-
-    sysState.allocked = 0;
-
     AFS_GLOCK();
-
-    /* In order that we not get ESTALE on @sys links that resolve
-       into the 2nd or later item in an @sys list, resolve it ourselves
-       and force a lookup of the actual match here. The real directory
-       thus gets the dentry. */
-    if (AFS_EQ_ATSYS(comp) && !afs_InitReq(&treq, credp)) {
-	Check_AtSys(ITOAFS(dip), comp, &sysState, &treq);
-	name = sysState.name;
-
-	code = afs_lookup(ITOAFS(dip), name, &vcp, credp);
-	while (code == ENOENT && Next_AtSys(ITOAFS(dip), &treq, &sysState)) {
-	    code = afs_lookup(ITOAFS(dip), name, &vcp, credp);
-	}
-    } else
-	code = afs_lookup(ITOAFS(dip), comp, &vcp, credp);
+    code = afs_lookup(ITOAFS(dip), comp, &vcp, credp);
     
     if (vcp) {
 	struct inode *ip = AFSTOI(vcp);
@@ -1141,28 +1118,6 @@ afs_linux_lookup(struct inode *dip, struct dentry *dp)
     dp->d_op = afs_dops;
     d_add(dp, AFSTOI(vcp));
 
-    if (sysState.allocked) osi_FreeLargeSpace(sysState.name);
-#if 0
-    /* Set up a dentry alias. Should we be doing this for @sys?
-       You only get one for a directory, which would be fine,
-       @sys would only map to one at a time, but it's unclear
-       that this is consistent behavior. */
-    if (AFS_EQ_ATSYS(comp) && sysState.allocked) {
-	int result;
-	struct dentry *dentry;
-
-	qstr.name = name;
-	qstr.len  = strlen(name);
-	qstr.hash = full_name_hash(name, qstr.len);
-	result = d_lookup(dp->d_parent, &qstr);
-	if (!result) {
-	    dentry = d_alloc(dp->d_parent, &qstr);
-	    if (dentry)
-		d_instantiate(dentry, AFSTOI(vcp));
-	}
-    }
-#endif
-
     AFS_GUNLOCK();
     crfree(credp);