From patchwork Tue Jan 5 15:31:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chuck Lever X-Patchwork-Id: 11999283 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C5318C433DB for ; Tue, 5 Jan 2021 15:31:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9A83A22AAA for ; Tue, 5 Jan 2021 15:31:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725925AbhAEPbo (ORCPT ); Tue, 5 Jan 2021 10:31:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37990 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727126AbhAEPbo (ORCPT ); Tue, 5 Jan 2021 10:31:44 -0500 Received: from mail-qk1-x72c.google.com (mail-qk1-x72c.google.com [IPv6:2607:f8b0:4864:20::72c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1B923C061574 for ; Tue, 5 Jan 2021 07:31:29 -0800 (PST) Received: by mail-qk1-x72c.google.com with SMTP id z11so26787363qkj.7 for ; Tue, 05 Jan 2021 07:31:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:subject:from:to:date:message-id:in-reply-to:references :user-agent:mime-version:content-transfer-encoding; bh=Mahf9IRkHH9EZ+lU/nog2IaIVN+9KiP4zb4gqG5Mkq4=; b=F3YqwcD9pt8+0oxRkRuHvZaeUGUqT1xza0WYjdn9JEWHndcL6PQQhBk/oxKTGI4FwE I8bkasyNs86d1WH5y3Q+jPjH8/l+2oHAho3lBp+YV8BmqLVNZX7QlTcR183I41FWgedr FkSeyZ6N+a+VDIDzKSab9U4qPcTxIrR0o5hGFU8Nqp88ym6x9emL9Xz37JB+kKdaB2Q/ Vr3zozoxZqrMMCMHjdQvGqjF5+4+b6QvvZ0JErK3L/rth+CY/X454NZ9sAHhvkLr3Ugo B+qpwZBx6bJvcuE8crYazjzLM2YCIhuYNhYiIgyT226XXV4x6cvfbRw1jBd7Ru9K/+Fg +S3g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:subject:from:to:date:message-id :in-reply-to:references:user-agent:mime-version :content-transfer-encoding; bh=Mahf9IRkHH9EZ+lU/nog2IaIVN+9KiP4zb4gqG5Mkq4=; b=FzwHO2lNa4piAKpMLfrUiTkKfjhrjIBsVWmtoORjU1huuL098Gqc0xwvKAwprhbF3r Vk8ishzMUGNjxBowycz4DlYutx4TKWIWSIWN4Zm0gzjnpDtAW8K2rNXr29AXxDUmhyof uh+cDDg45mz4io2KEqI3f0vZXly1mncDDJHlJXVxtbSQB00hu2sHRYkW97xYe5N91g4c wSqKUnoURp3Gkjh4jByd9zHplbHVScdb7wnv8hg2n9QDZjHab4NgkmB7i4d6tB56uo53 28pqjlkvdxIwlAMrixwUZrvBYw/iq7L0hCjPnqxfXd6iFMeasw7gnQOhlNRfIWeqbbq8 zBNA== X-Gm-Message-State: AOAM530tgXbNleSIz+HJquapPbux6DZp+kOtqLh39UE7J+U46nlOekY2 hqWPjC2pmaONc2udmiGBM1r5YC3B1ts= X-Google-Smtp-Source: ABdhPJy8LV6EoaCtqegikBen5z24X+p0N0GeFEaZtoLEMUIuswm82ggaByRYORn+5vJvtF2f04B9Qw== X-Received: by 2002:a37:a50c:: with SMTP id o12mr90976qke.98.1609860687930; Tue, 05 Jan 2021 07:31:27 -0800 (PST) Received: from gateway.1015granger.net (c-68-61-232-219.hsd1.mi.comcast.net. [68.61.232.219]) by smtp.gmail.com with ESMTPSA id r22sm147514qkk.67.2021.01.05.07.31.27 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 05 Jan 2021 07:31:27 -0800 (PST) Sender: Chuck Lever Received: from klimt.1015granger.net (klimt.1015granger.net [192.168.1.55]) by gateway.1015granger.net (8.14.7/8.14.7) with ESMTP id 105FVQ13020880 for ; Tue, 5 Jan 2021 15:31:26 GMT Subject: [PATCH v1 20/42] NFSD: Update the MKNOD3args decoder to use struct xdr_stream From: Chuck Lever To: linux-nfs@vger.kernel.org Date: Tue, 05 Jan 2021 10:31:26 -0500 Message-ID: <160986068625.5532.13338988223363460604.stgit@klimt.1015granger.net> In-Reply-To: <160986050640.5532.16498408936966394862.stgit@klimt.1015granger.net> References: <160986050640.5532.16498408936966394862.stgit@klimt.1015granger.net> User-Agent: StGit/0.23-29-ga622f1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org This commit removes the last usage of the original decode_sattr3(), so it is removed as a clean-up. Signed-off-by: Chuck Lever --- fs/nfsd/nfs3xdr.c | 107 +++++++++++++++++------------------------------------ 1 file changed, 35 insertions(+), 72 deletions(-) diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c index e599d1481b2d..5fb7e8a599c4 100644 --- a/fs/nfsd/nfs3xdr.c +++ b/fs/nfsd/nfs3xdr.c @@ -103,26 +103,6 @@ encode_fh(__be32 *p, struct svc_fh *fhp) return p + XDR_QUADLEN(size); } -/* - * Decode a file name and make sure that the path contains - * no slashes or null bytes. - */ -static __be32 * -decode_filename(__be32 *p, char **namp, unsigned int *lenp) -{ - char *name; - unsigned int i; - - if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS3_MAXNAMLEN)) != NULL) { - for (i = 0, name = *namp; i < *lenp; i++, name++) { - if (*name == '\0' || *name == '/') - return NULL; - } - } - - return p; -} - static bool svcxdr_decode_filename3(struct xdr_stream *xdr, char **name, unsigned int *len) { @@ -262,49 +242,26 @@ svcxdr_decode_sattrguard3(struct xdr_stream *xdr, struct nfsd3_sattrargs *args) return true; } -static __be32 * -decode_sattr3(__be32 *p, struct iattr *iap, struct user_namespace *userns) +static bool +svcxdr_decode_specdata3(struct xdr_stream *xdr, struct nfsd3_mknodargs *args) { - u32 tmp; + __be32 *p; - iap->ia_valid = 0; + p = xdr_inline_decode(xdr, XDR_UNIT * 2); + if (!p) + return false; + args->major = be32_to_cpup(p++); + args->minor = be32_to_cpup(p); - if (*p++) { - iap->ia_valid |= ATTR_MODE; - iap->ia_mode = ntohl(*p++); - } - if (*p++) { - iap->ia_uid = make_kuid(userns, ntohl(*p++)); - if (uid_valid(iap->ia_uid)) - iap->ia_valid |= ATTR_UID; - } - if (*p++) { - iap->ia_gid = make_kgid(userns, ntohl(*p++)); - if (gid_valid(iap->ia_gid)) - iap->ia_valid |= ATTR_GID; - } - if (*p++) { - u64 newsize; + return true; +} - iap->ia_valid |= ATTR_SIZE; - p = xdr_decode_hyper(p, &newsize); - iap->ia_size = min_t(u64, newsize, NFS_OFFSET_MAX); - } - if ((tmp = ntohl(*p++)) == 1) { /* set to server time */ - iap->ia_valid |= ATTR_ATIME; - } else if (tmp == 2) { /* set to client time */ - iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET; - iap->ia_atime.tv_sec = ntohl(*p++); - iap->ia_atime.tv_nsec = ntohl(*p++); - } - if ((tmp = ntohl(*p++)) == 1) { /* set to server time */ - iap->ia_valid |= ATTR_MTIME; - } else if (tmp == 2) { /* set to client time */ - iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET; - iap->ia_mtime.tv_sec = ntohl(*p++); - iap->ia_mtime.tv_nsec = ntohl(*p++); - } - return p; +static bool +svcxdr_decode_devicedata3(struct svc_rqst *rqstp, struct xdr_stream *xdr, + struct nfsd3_mknodargs *args) +{ + return svcxdr_decode_sattr3(rqstp, xdr, &args->attrs) && + svcxdr_decode_specdata3(xdr, args); } static __be32 *encode_fsid(__be32 *p, struct svc_fh *fhp) @@ -644,24 +601,30 @@ nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p) int nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, __be32 *p) { + struct xdr_stream *xdr = &rqstp->rq_arg_stream; struct nfsd3_mknodargs *args = rqstp->rq_argp; - if (!(p = decode_fh(p, &args->fh)) - || !(p = decode_filename(p, &args->name, &args->len))) + if (!svcxdr_decode_diropargs3(xdr, &args->fh, &args->name, &args->len)) + return 0; + if (xdr_stream_decode_u32(xdr, &args->ftype) < 0) + return 0; + switch (args->ftype) { + case NF3CHR: + case NF3BLK: + return svcxdr_decode_devicedata3(rqstp, xdr, args); + case NF3SOCK: + case NF3FIFO: + return svcxdr_decode_sattr3(rqstp, xdr, &args->attrs); + case NF3REG: + case NF3DIR: + case NF3LNK: + /* Valid XDR but illegal file types */ + break; + default: return 0; - - args->ftype = ntohl(*p++); - - if (args->ftype == NF3BLK || args->ftype == NF3CHR - || args->ftype == NF3SOCK || args->ftype == NF3FIFO) - p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp)); - - if (args->ftype == NF3BLK || args->ftype == NF3CHR) { - args->major = ntohl(*p++); - args->minor = ntohl(*p++); } - return xdr_argsize_check(rqstp, p); + return 1; } int