Restore LOOKUP_DIRECTORY hint handling in final lookup on open()
Al Viro [Fri, 26 Mar 2010 16:40:13 +0000 (12:40 -0400)]
Lose want_dir argument, while we are at it - since now
nd->flags & LOOKUP_DIRECTORY is equivalent to it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/namei.c

index 1c0fca6..a7dce91 100644 (file)
@@ -1610,8 +1610,7 @@ exit:
 
 static struct file *do_last(struct nameidata *nd, struct path *path,
                            int open_flag, int acc_mode,
-                           int mode, const char *pathname,
-                           int *want_dir)
+                           int mode, const char *pathname)
 {
        struct dentry *dir = nd->path.dentry;
        struct file *filp;
@@ -1642,7 +1641,7 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
        if (nd->last.name[nd->last.len]) {
                if (open_flag & O_CREAT)
                        goto exit;
-               *want_dir = 1;
+               nd->flags |= LOOKUP_DIRECTORY;
        }
 
        /* just plain open? */
@@ -1656,8 +1655,10 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
                if (path->dentry->d_inode->i_op->follow_link)
                        return NULL;
                error = -ENOTDIR;
-               if (*want_dir && !path->dentry->d_inode->i_op->lookup)
-                       goto exit_dput;
+               if (nd->flags & LOOKUP_DIRECTORY) {
+                       if (!path->dentry->d_inode->i_op->lookup)
+                               goto exit_dput;
+               }
                path_to_nameidata(path, nd);
                audit_inode(pathname, nd->path.dentry);
                goto ok;
@@ -1766,7 +1767,6 @@ struct file *do_filp_open(int dfd, const char *pathname,
        int count = 0;
        int flag = open_to_namei_flags(open_flag);
        int force_reval = 0;
-       int want_dir = open_flag & O_DIRECTORY;
 
        if (!(open_flag & O_CREAT))
                mode = 0;
@@ -1828,7 +1828,9 @@ reval:
                if (open_flag & O_EXCL)
                        nd.flags |= LOOKUP_EXCL;
        }
-       filp = do_last(&nd, &path, open_flag, acc_mode, mode, pathname, &want_dir);
+       if (open_flag & O_DIRECTORY)
+               nd.flags |= LOOKUP_DIRECTORY;
+       filp = do_last(&nd, &path, open_flag, acc_mode, mode, pathname);
        while (unlikely(!filp)) { /* trailing symlink */
                struct path holder;
                struct inode *inode = path.dentry->d_inode;
@@ -1866,7 +1868,7 @@ reval:
                }
                holder = path;
                nd.flags &= ~LOOKUP_PARENT;
-               filp = do_last(&nd, &path, open_flag, acc_mode, mode, pathname, &want_dir);
+               filp = do_last(&nd, &path, open_flag, acc_mode, mode, pathname);
                if (inode->i_op->put_link)
                        inode->i_op->put_link(holder.dentry, &nd, cookie);
                path_put(&holder);