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authorLinus Torvalds <torvalds@g5.osdl.org>2005-08-19 21:02:56 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-08-19 21:02:56 -0400
commitcc314eef0128a807e50fa03baf2d0abc0647952c (patch)
tree8e38db1be28006894915273b3f3cb3beaa6efda3 /fs/ext2/symlink.c
parent2fb1e3086df9b454538491fba8121298da37cd23 (diff)
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/ext2/symlink.c')
-rw-r--r--fs/ext2/symlink.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ext2/symlink.c b/fs/ext2/symlink.c
index 9f7bac01d557..1e67d87cfa91 100644
--- a/fs/ext2/symlink.c
+++ b/fs/ext2/symlink.c
@@ -21,11 +21,11 @@
21#include "xattr.h" 21#include "xattr.h"
22#include <linux/namei.h> 22#include <linux/namei.h>
23 23
24static int ext2_follow_link(struct dentry *dentry, struct nameidata *nd) 24static void *ext2_follow_link(struct dentry *dentry, struct nameidata *nd)
25{ 25{
26 struct ext2_inode_info *ei = EXT2_I(dentry->d_inode); 26 struct ext2_inode_info *ei = EXT2_I(dentry->d_inode);
27 nd_set_link(nd, (char *)ei->i_data); 27 nd_set_link(nd, (char *)ei->i_data);
28 return 0; 28 return NULL;
29} 29}
30 30
31struct inode_operations ext2_symlink_inode_operations = { 31struct inode_operations ext2_symlink_inode_operations = {