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[68.61.232.219]) by smtp.gmail.com with ESMTPSA id b64sm10354147qkg.19.2020.11.23.12.06.06 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 23 Nov 2020 12:06:06 -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 0ANK65ei010340 for ; Mon, 23 Nov 2020 20:06:05 GMT Subject: [PATCH v3 24/85] NFSD: Relocate nfsd4_decode_opaque() From: Chuck Lever To: linux-nfs@vger.kernel.org Date: Mon, 23 Nov 2020 15:06:05 -0500 Message-ID: <160616196539.51996.2006468103191305772.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 Enable nfsd4_decode_opaque() to be used in more decoders, and replace the READ* macros in nfsd4_decode_opaque(). Signed-off-by: Chuck Lever --- fs/nfsd/nfs4xdr.c | 43 +++++++++++++++++++++++++++---------------- 1 file changed, 27 insertions(+), 16 deletions(-) diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 472d715e8632..a8e0cf30b073 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -207,6 +207,33 @@ static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) return ret; } + +/* + * NFSv4 basic data type decoders + */ + +static __be32 +nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o) +{ + __be32 *p; + u32 len; + + if (xdr_stream_decode_u32(argp->xdr, &len) < 0) + return nfserr_bad_xdr; + if (len == 0 || len > NFS4_OPAQUE_LIMIT) + return nfserr_bad_xdr; + p = xdr_inline_decode(argp->xdr, len); + if (!p) + return nfserr_bad_xdr; + o->data = svcxdr_tmpalloc(argp, len); + if (!o->data) + return nfserr_jukebox; + o->len = len; + memcpy(o->data, p, len); + + return nfs_ok; +} + static __be32 nfsd4_decode_component4(struct nfsd4_compoundargs *argp, char **namp, u32 *lenp) { @@ -943,22 +970,6 @@ static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x) return nfserr_bad_xdr; } -static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o) -{ - DECODE_HEAD; - - READ_BUF(4); - o->len = be32_to_cpup(p++); - - if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT) - return nfserr_bad_xdr; - - READ_BUF(o->len); - SAVEMEM(o->data, o->len); - - DECODE_TAIL; -} - static __be32 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) {