Return-Path: Received: from mail-it0-f68.google.com ([209.85.214.68]:32930 "EHLO mail-it0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753550AbdBRTMw (ORCPT ); Sat, 18 Feb 2017 14:12:52 -0500 Received: by mail-it0-f68.google.com with SMTP id e137so6808297itc.0 for ; Sat, 18 Feb 2017 11:12:52 -0800 (PST) From: Trond Myklebust To: Anna Schumaker Cc: linux-nfs@vger.kernel.org Subject: [PATCH v3 2/4] NFSv4: Replace ad-hoc xdr encode/decode helpers with xdr_stream_* generics Date: Sat, 18 Feb 2017 14:12:44 -0500 Message-Id: <20170218191246.32687-3-trond.myklebust@primarydata.com> In-Reply-To: <20170218191246.32687-2-trond.myklebust@primarydata.com> References: <20170218191246.32687-1-trond.myklebust@primarydata.com> <20170218191246.32687-2-trond.myklebust@primarydata.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: Signed-off-by: Trond Myklebust --- fs/nfs/callback_xdr.c | 8 ++---- fs/nfs/flexfilelayout/flexfilelayout.c | 5 +--- fs/nfs/nfs4xdr.c | 52 ++++++++++------------------------ 3 files changed, 18 insertions(+), 47 deletions(-) diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c index eb094c6011d8..e732a65db546 100644 --- a/fs/nfs/callback_xdr.c +++ b/fs/nfs/callback_xdr.c @@ -582,12 +582,8 @@ static __be32 decode_notify_lock_args(struct svc_rqst *rqstp, struct xdr_stream static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str) { - __be32 *p; - - p = xdr_reserve_space(xdr, 4 + len); - if (unlikely(p == NULL)) - return htonl(NFS4ERR_RESOURCE); - xdr_encode_opaque(p, str, len); + if (unlikely(xdr_stream_encode_opaque(xdr, str, len) < 0)) + return cpu_to_be32(NFS4ERR_RESOURCE); return 0; } diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c index 42e3e9daa328..471efdc2589d 100644 --- a/fs/nfs/flexfilelayout/flexfilelayout.c +++ b/fs/nfs/flexfilelayout/flexfilelayout.c @@ -1966,10 +1966,7 @@ static int ff_layout_encode_ioerr(struct xdr_stream *xdr, static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len) { - __be32 *p; - - p = xdr_reserve_space(xdr, len); - xdr_encode_opaque_fixed(p, buf, len); + WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0); } static void diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index e9255cb453e6..62ff0ff19880 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -924,34 +924,22 @@ static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes) static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len) { - __be32 *p; - - p = xdr_reserve_space(xdr, len); - xdr_encode_opaque_fixed(p, buf, len); + WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0); } static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str) { - __be32 *p; - - p = reserve_space(xdr, 4 + len); - xdr_encode_opaque(p, str, len); + WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0); } static void encode_uint32(struct xdr_stream *xdr, u32 n) { - __be32 *p; - - p = reserve_space(xdr, 4); - *p = cpu_to_be32(n); + WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0); } static void encode_uint64(struct xdr_stream *xdr, u64 n) { - __be32 *p; - - p = reserve_space(xdr, 8); - xdr_encode_hyper(p, n); + WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0); } static void encode_nfs4_seqid(struct xdr_stream *xdr, @@ -3062,20 +3050,13 @@ static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string) { - __be32 *p; - - p = xdr_inline_decode(xdr, 4); - if (unlikely(!p)) - goto out_overflow; - *len = be32_to_cpup(p); - p = xdr_inline_decode(xdr, *len); - if (unlikely(!p)) - goto out_overflow; - *string = (char *)p; + ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string); + if (unlikely(ret < 0)) { + print_overflow_msg(__func__, xdr); + return -EIO; + } + *len = ret; return 0; -out_overflow: - print_overflow_msg(__func__, xdr); - return -EIO; } static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr) @@ -4294,15 +4275,12 @@ static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access) static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len) { - __be32 *p; - - p = xdr_inline_decode(xdr, len); - if (likely(p)) { - memcpy(buf, p, len); - return 0; + ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len); + if (unlikely(ret < 0)) { + print_overflow_msg(__func__, xdr); + return -EIO; } - print_overflow_msg(__func__, xdr); - return -EIO; + return 0; } static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) -- 2.9.3