Preparations to caching root in path_walk()
Split do_path_lookup(), opencode the call from do_filp_open()
do_filp_open() is the only caller of do_path_lookup() that
cares about root afterwards (it keeps resolving symlinks on
O_CREAT path after it'd done LOOKUP_PARENT walk). So when
we start caching fs->root in path_walk(), it'll need a different
treatment.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/namei.c b/fs/namei.c
index c82805d..895733e 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1017,9 +1017,7 @@
return link_path_walk(name, nd);
}
-/* Returns 0 and nd will be valid on success; Retuns error, otherwise. */
-static int do_path_lookup(int dfd, const char *name,
- unsigned int flags, struct nameidata *nd)
+static int path_init(int dfd, const char *name, unsigned int flags, struct nameidata *nd)
{
int retval = 0;
int fput_needed;
@@ -1063,17 +1061,25 @@
fput_light(file, fput_needed);
}
-
- retval = path_walk(name, nd);
- if (unlikely(!retval && !audit_dummy_context() && nd->path.dentry &&
- nd->path.dentry->d_inode))
- audit_inode(name, nd->path.dentry);
-out_fail:
- return retval;
+ return 0;
fput_fail:
fput_light(file, fput_needed);
- goto out_fail;
+out_fail:
+ return retval;
+}
+
+/* Returns 0 and nd will be valid on success; Retuns error, otherwise. */
+static int do_path_lookup(int dfd, const char *name,
+ unsigned int flags, struct nameidata *nd)
+{
+ int retval = path_init(dfd, name, flags, nd);
+ if (!retval)
+ retval = path_walk(name, nd);
+ if (unlikely(!retval && !audit_dummy_context() && nd->path.dentry &&
+ nd->path.dentry->d_inode))
+ audit_inode(name, nd->path.dentry);
+ return retval;
}
int path_lookup(const char *name, unsigned int flags,
@@ -1676,9 +1682,14 @@
/*
* Create - we need to know the parent.
*/
- error = do_path_lookup(dfd, pathname, LOOKUP_PARENT, &nd);
+ error = path_init(dfd, pathname, LOOKUP_PARENT, &nd);
if (error)
return ERR_PTR(error);
+ error = path_walk(pathname, &nd);
+ if (error)
+ return ERR_PTR(error);
+ if (unlikely(!audit_dummy_context()))
+ audit_inode(pathname, nd.path.dentry);
/*
* We have the parent and last component. First of all, check