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authorLinus Torvalds <torvalds@g5.osdl.org>2005-08-19 18:02:56 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-08-19 18:02:56 -0700
commitcc314eef0128a807e50fa03baf2d0abc0647952c (patch)
tree8e38db1be28006894915273b3f3cb3beaa6efda3 /fs/ext3/symlink.c
parent2fb1e3086df9b454538491fba8121298da37cd23 (diff)
downloadop-kernel-dev-cc314eef0128a807e50fa03baf2d0abc0647952c.zip
op-kernel-dev-cc314eef0128a807e50fa03baf2d0abc0647952c.tar.gz
Fix nasty ncpfs symlink handling bug.
This bug could cause oopses and page state corruption, because ncpfs used the generic page-cache symlink handlign functions. But those functions only work if the page cache is guaranteed to be "stable", ie a page that was installed when the symlink walk was started has to still be installed in the page cache at the end of the walk. We could have fixed ncpfs to not use the generic helper routines, but it is in many ways much cleaner to instead improve on the symlink walking helper routines so that they don't require that absolute stability. We do this by allowing "follow_link()" to return a error-pointer as a cookie, which is fed back to the cleanup "put_link()" routine. This also simplifies NFS symlink handling. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/ext3/symlink.c')
-rw-r--r--fs/ext3/symlink.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ext3/symlink.c b/fs/ext3/symlink.c
index 8c3e728..4f79122 100644
--- a/fs/ext3/symlink.c
+++ b/fs/ext3/symlink.c
@@ -23,11 +23,11 @@
#include <linux/namei.h>
#include "xattr.h"
-static int ext3_follow_link(struct dentry *dentry, struct nameidata *nd)
+static void * ext3_follow_link(struct dentry *dentry, struct nameidata *nd)
{
struct ext3_inode_info *ei = EXT3_I(dentry->d_inode);
nd_set_link(nd, (char*)ei->i_data);
- return 0;
+ return NULL;
}
struct inode_operations ext3_symlink_inode_operations = {
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