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[68.61.232.219]) by smtp.gmail.com with ESMTPSA id p128sm6173745qkc.47.2020.11.23.12.06.43 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 23 Nov 2020 12:06:43 -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 0ANK6go2010361 for ; Mon, 23 Nov 2020 20:06:42 GMT Subject: [PATCH v3 31/85] NFSD: Add helper to decode NFSv4 verifiers From: Chuck Lever To: linux-nfs@vger.kernel.org Date: Mon, 23 Nov 2020 15:06:42 -0500 Message-ID: <160616200239.51996.5356570219804246528.stgit@klimt.1015granger.net> In-Reply-To: <160616177104.51996.14915419165992024951.stgit@klimt.1015granger.net> References: <160616177104.51996.14915419165992024951.stgit@klimt.1015granger.net> User-Agent: StGit/0.23-29-ga622f1 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org This helper will be used to simplify decoders in subsequent patches. Signed-off-by: Chuck Lever --- fs/nfsd/nfs4xdr.c | 22 ++++++++++++++++++---- 1 file changed, 18 insertions(+), 4 deletions(-) diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 4c2a7b4877ad..7254c9e4e825 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -284,6 +284,18 @@ nfsd4_decode_nfstime4(struct nfsd4_compoundargs *argp, struct timespec64 *tv) return nfs_ok; } +static __be32 +nfsd4_decode_verifier4(struct nfsd4_compoundargs *argp, nfs4_verifier *verf) +{ + __be32 *p; + + p = xdr_inline_decode(argp->xdr, NFS4_VERIFIER_SIZE); + if (!p) + return nfserr_bad_xdr; + memcpy(verf->data, p, sizeof(verf->data)); + return nfs_ok; +} + static __be32 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) { @@ -1047,14 +1059,16 @@ nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) goto out; break; case NFS4_CREATE_EXCLUSIVE: - READ_BUF(NFS4_VERIFIER_SIZE); - COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); + status = nfsd4_decode_verifier4(argp, &open->op_verf); + if (status) + return status; break; case NFS4_CREATE_EXCLUSIVE4_1: if (argp->minorversion < 1) goto xdr_error; - READ_BUF(NFS4_VERIFIER_SIZE); - COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); + status = nfsd4_decode_verifier4(argp, &open->op_verf); + if (status) + return status; status = nfsd4_decode_fattr4(argp, open->op_bmval, ARRAY_SIZE(open->op_bmval), &open->op_iattr, &open->op_acl,