From patchwork Thu Apr 12 23:03:19 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ronnie Sahlberg X-Patchwork-Id: 897817 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-cifs-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 40Mc051HzNz9s1l for ; Fri, 13 Apr 2018 09:03:32 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753064AbeDLXDb (ORCPT ); Thu, 12 Apr 2018 19:03:31 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:60832 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752379AbeDLXDb (ORCPT ); Thu, 12 Apr 2018 19:03:31 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 8ED58EBFFB; Thu, 12 Apr 2018 23:03:30 +0000 (UTC) Received: from test1190.test.redhat.com (vpn2-54-105.bne.redhat.com [10.64.54.105]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4C374215CDC6; Thu, 12 Apr 2018 23:03:28 +0000 (UTC) From: Ronnie Sahlberg To: linux-cifs Cc: Steve French Subject: [PATCH 04/21] cifs: Change SMB2_open to return an iov for the error parameter Date: Fri, 13 Apr 2018 09:03:19 +1000 Message-Id: <20180412230319.16019-2-lsahlber@redhat.com> In-Reply-To: <20180412230319.16019-1-lsahlber@redhat.com> References: <20180412230319.16019-1-lsahlber@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.1]); Thu, 12 Apr 2018 23:03:30 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.1]); Thu, 12 Apr 2018 23:03:30 +0000 (UTC) for IP:'10.11.54.6' DOMAIN:'int-mx06.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'lsahlber@redhat.com' RCPT:'' Sender: linux-cifs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org Signed-off-by: Ronnie Sahlberg --- fs/cifs/smb2ops.c | 10 ++++++---- fs/cifs/smb2pdu.c | 10 ++++++---- fs/cifs/smb2proto.h | 2 +- 3 files changed, 13 insertions(+), 9 deletions(-) diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index def84fed3571..b4ae932ea134 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -1451,6 +1451,7 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon, __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; struct cifs_open_parms oparms; struct cifs_fid fid; + struct kvec err_iov = {NULL, 0}; struct smb2_err_rsp *err_buf = NULL; struct smb2_symlink_err_rsp *symlink; unsigned int sub_len; @@ -1473,15 +1474,16 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon, oparms.fid = &fid; oparms.reconnect = false; - rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf); + rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_iov); if (!rc || !err_buf) { kfree(utf16_path); return -ENOENT; } + err_buf = err_iov.iov_base; if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) || - get_rfc1002_length(err_buf) + server->vals->header_preamble_size < SMB2_SYMLINK_STRUCT_SIZE) { + err_iov.iov_len + server->vals->header_preamble_size < SMB2_SYMLINK_STRUCT_SIZE) { kfree(utf16_path); return -ENOENT; } @@ -1494,13 +1496,13 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon, print_len = le16_to_cpu(symlink->PrintNameLength); print_offset = le16_to_cpu(symlink->PrintNameOffset); - if (get_rfc1002_length(err_buf) + server->vals->header_preamble_size < + if (err_iov.iov_len + server->vals->header_preamble_size < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) { kfree(utf16_path); return -ENOENT; } - if (get_rfc1002_length(err_buf) + server->vals->header_preamble_size < + if (err_iov.iov_len + server->vals->header_preamble_size < SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) { kfree(utf16_path); return -ENOENT; diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 30dade197e7e..f92e8a16e782 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -1701,7 +1701,7 @@ alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len, int SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, __u8 *oplock, struct smb2_file_all_info *buf, - struct smb2_err_rsp **err_buf) + struct kvec *err_iov) { struct smb2_create_req *req; struct smb2_create_rsp *rsp; @@ -1841,9 +1841,11 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, if (rc != 0) { cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); - if (err_buf && rsp) - *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4, - GFP_KERNEL); + if (err_iov && rsp) { + *err_iov = rsp_iov; + resp_buftype = CIFS_NO_BUFFER; + rsp = NULL; + } goto creat_exit; } diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h index cbcce3f7e86f..8ba24a95db71 100644 --- a/fs/cifs/smb2proto.h +++ b/fs/cifs/smb2proto.h @@ -122,7 +122,7 @@ extern int SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon); extern int SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, __u8 *oplock, struct smb2_file_all_info *buf, - struct smb2_err_rsp **err_buf); + struct kvec *err_iov); extern int SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data, u32 indatalen,