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authorJeff Layton <jlayton@redhat.com>2012-12-11 18:10:09 +0100
committerAl Viro <viro@zeniv.linux.org.uk>2012-12-21 00:50:04 +0100
commit9e790bd65ce4cbfdff305a57b67b1a2cbe5d4335 (patch)
treeab788cbbbbb2a3367b28f0434206e8857cc3fe4d /fs
parentvfs: fix linkat to retry once on ESTALE errors (diff)
downloadlinux-9e790bd65ce4cbfdff305a57b67b1a2cbe5d4335.tar.xz
linux-9e790bd65ce4cbfdff305a57b67b1a2cbe5d4335.zip
vfs: add a flags argument to user_path_parent
...so we can pass in LOOKUP_REVAL. For now, nothing does yet. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
-rw-r--r--fs/namei.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/fs/namei.c b/fs/namei.c
index 6868699272bf..19190618695f 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2175,15 +2175,19 @@ int user_path_at(int dfd, const char __user *name, unsigned flags,
* path-walking is complete.
*/
static struct filename *
-user_path_parent(int dfd, const char __user *path, struct nameidata *nd)
+user_path_parent(int dfd, const char __user *path, struct nameidata *nd,
+ unsigned int flags)
{
struct filename *s = getname(path);
int error;
+ /* only LOOKUP_REVAL is allowed in extra flags */
+ flags &= LOOKUP_REVAL;
+
if (IS_ERR(s))
return s;
- error = filename_lookup(dfd, s, LOOKUP_PARENT, nd);
+ error = filename_lookup(dfd, s, flags | LOOKUP_PARENT, nd);
if (error) {
putname(s);
return ERR_PTR(error);
@@ -3336,7 +3340,7 @@ static long do_rmdir(int dfd, const char __user *pathname)
struct dentry *dentry;
struct nameidata nd;
- name = user_path_parent(dfd, pathname, &nd);
+ name = user_path_parent(dfd, pathname, &nd, 0);
if (IS_ERR(name))
return PTR_ERR(name);
@@ -3432,7 +3436,7 @@ static long do_unlinkat(int dfd, const char __user *pathname)
struct nameidata nd;
struct inode *inode = NULL;
- name = user_path_parent(dfd, pathname, &nd);
+ name = user_path_parent(dfd, pathname, &nd, 0);
if (IS_ERR(name))
return PTR_ERR(name);
@@ -3827,13 +3831,13 @@ SYSCALL_DEFINE4(renameat, int, olddfd, const char __user *, oldname,
struct filename *to;
int error;
- from = user_path_parent(olddfd, oldname, &oldnd);
+ from = user_path_parent(olddfd, oldname, &oldnd, 0);
if (IS_ERR(from)) {
error = PTR_ERR(from);
goto exit;
}
- to = user_path_parent(newdfd, newname, &newnd);
+ to = user_path_parent(newdfd, newname, &newnd, 0);
if (IS_ERR(to)) {
error = PTR_ERR(to);
goto exit1;