From patchwork Sat Sep 5 10:27:23 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Gruenbacher X-Patchwork-Id: 7128381 Return-Path: X-Original-To: patchwork-linux-fsdevel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id EFFA4BEEC1 for ; Sat, 5 Sep 2015 10:37:25 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 28BF5207AA for ; Sat, 5 Sep 2015 10:37:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 390172081D for ; Sat, 5 Sep 2015 10:37:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753329AbbIEK3w (ORCPT ); Sat, 5 Sep 2015 06:29:52 -0400 Received: from mx1.redhat.com ([209.132.183.28]:48554 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752070AbbIEK2b (ORCPT ); Sat, 5 Sep 2015 06:28:31 -0400 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (Postfix) with ESMTPS id 3C74AC0AF3D4; Sat, 5 Sep 2015 10:28:31 +0000 (UTC) Received: from nuc.home.com (vpn1-7-178.ams2.redhat.com [10.36.7.178]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t85ARbEL023920; Sat, 5 Sep 2015 06:28:29 -0400 From: Andreas Gruenbacher To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-api@vger.kernel.org, linux-cifs@vger.kernel.org, linux-security-module@vger.kernel.org Subject: [RFC v7 28/41] nfsd: Keep list of acls to dispose of in compoundargs Date: Sat, 5 Sep 2015 12:27:23 +0200 Message-Id: <1441448856-13478-29-git-send-email-agruenba@redhat.com> In-Reply-To: <1441448856-13478-1-git-send-email-agruenba@redhat.com> References: <1441448856-13478-1-git-send-email-agruenba@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, SUSPICIOUS_RECIPS, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP We will decode acls in requests into richacls. Even if unlikely, there can be more than one acl in a single request; those richacls need to be richacl_put() at the end of the request instead of kfree()d, so keep a list of acls in compoundargs for that. Signed-off-by: Andreas Gruenbacher --- fs/nfsd/nfs4xdr.c | 27 +++++++++++++++++++++++++++ fs/nfsd/xdr4.h | 6 ++++++ 2 files changed, 33 insertions(+) diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 75e0563..0768251 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -40,6 +40,7 @@ #include #include #include +#include #include "idmap.h" #include "acl.h" @@ -196,6 +197,24 @@ svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len) return tb->buf; } +static struct richacl * +svcxdr_alloc_richacl(struct nfsd4_compoundargs *argp, u32 nace) +{ + struct svcxdr_richacl *acls; + + acls = kmalloc(sizeof(*acls), GFP_KERNEL); + if (!acls) + return NULL; + acls->acl = richacl_alloc(nace, GFP_KERNEL); + if (!acls->acl) { + kfree(acls); + return NULL; + } + acls->next = argp->acls; + argp->acls = acls; + return acls->acl; +} + /* * For xdr strings that need to be passed to other kernel api's * as null-terminated strings. @@ -4395,6 +4414,13 @@ int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp) args->to_free = tb->next; kfree(tb); } + while (args->acls) { + struct svcxdr_richacl *acls = args->acls; + + args->acls = acls->next; + richacl_put(acls->acl); + kfree(acls); + } return 1; } @@ -4413,6 +4439,7 @@ nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_comp args->pagelen = rqstp->rq_arg.page_len; args->tmpp = NULL; args->to_free = NULL; + args->acls = NULL; args->ops = args->iops; args->rqstp = rqstp; diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h index 9f99100..b698585 100644 --- a/fs/nfsd/xdr4.h +++ b/fs/nfsd/xdr4.h @@ -570,6 +570,11 @@ struct svcxdr_tmpbuf { char buf[]; }; +struct svcxdr_richacl { + struct svcxdr_richacl *next; + struct richacl *acl; +}; + struct nfsd4_compoundargs { /* scratch variables for XDR decode */ __be32 * p; @@ -579,6 +584,7 @@ struct nfsd4_compoundargs { __be32 tmp[8]; __be32 * tmpp; struct svcxdr_tmpbuf *to_free; + struct svcxdr_richacl *acls; struct svc_rqst *rqstp;