[SUNRPC]: svc_{get,put}nl()

* add svc_getnl():
	Take network-endian value from buffer, convert to host-endian
	and return it.
* add svc_putnl():
	Take host-endian value, convert to network-endian and put it
	into a buffer.
* annotate svc_getu32()/svc_putu32() as dealing with network-endian.
* convert to svc_getnl(), svc_putnl().

[AV: in large part it's a carved-up Alexey's patch]
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/sunrpc/svc.h

@@ -78,28 +78,45 @@ struct svc_serv {
  */
 #define RPCSVC_MAXPAGES		((RPCSVC_MAXPAYLOAD+PAGE_SIZE-1)/PAGE_SIZE + 2)
 
-static inline u32 svc_getu32(struct kvec *iov)
+static inline u32 svc_getnl(struct kvec *iov)
 {
-	u32 val, *vp;
+	__be32 val, *vp;
 	vp = iov->iov_base;
 	val = *vp++;
 	iov->iov_base = (void*)vp;
-	iov->iov_len -= sizeof(u32);
+	iov->iov_len -= sizeof(__be32);
+	return ntohl(val);
+}
+
+static inline void svc_putnl(struct kvec *iov, u32 val)
+{
+	__be32 *vp = iov->iov_base + iov->iov_len;
+	*vp = htonl(val);
+	iov->iov_len += sizeof(__be32);
+}
+
+static inline __be32 svc_getu32(struct kvec *iov)
+{
+	__be32 val, *vp;
+	vp = iov->iov_base;
+	val = *vp++;
+	iov->iov_base = (void*)vp;
+	iov->iov_len -= sizeof(__be32);
 	return val;
 }
 
 static inline void svc_ungetu32(struct kvec *iov)
 {
-	u32 *vp = (u32 *)iov->iov_base;
+	__be32 *vp = (__be32 *)iov->iov_base;
 	iov->iov_base = (void *)(vp - 1);
 	iov->iov_len += sizeof(*vp);
 }
 
-static inline void svc_putu32(struct kvec *iov, u32 val)
+static inline void svc_putu32(struct kvec *iov, __be32 val)
 {
-	u32 *vp = iov->iov_base + iov->iov_len;
+	__be32 *vp = iov->iov_base + iov->iov_len;
 	*vp = val;
-	iov->iov_len += sizeof(u32);
+	iov->iov_len += sizeof(__be32);
 }
 
 	

net/sunrpc/auth_gss/svcauth_gss.c

@@ -607,7 +607,7 @@ svc_safe_getnetobj(struct kvec *argv, struct xdr_netobj *o)
 
 	if (argv->iov_len < 4)
 		return -1;
-	o->len = ntohl(svc_getu32(argv));
+	o->len = svc_getnl(argv);
 	l = round_up_to_quad(o->len);
 	if (argv->iov_len < l)
 		return -1;
@@ -624,7 +624,7 @@ svc_safe_putnetobj(struct kvec *resv, struct xdr_netobj *o)
 
 	if (resv->iov_len + 4 > PAGE_SIZE)
 		return -1;
-	svc_putu32(resv, htonl(o->len));
+	svc_putnl(resv, o->len);
 	p = resv->iov_base + resv->iov_len;
 	resv->iov_len += round_up_to_quad(o->len);
 	if (resv->iov_len > PAGE_SIZE)
@@ -657,7 +657,7 @@ gss_verify_header(struct svc_rqst *rqstp, struct rsc *rsci,
 	*authp = rpc_autherr_badverf;
 	if (argv->iov_len < 4)
 		return SVC_DENIED;
-	flavor = ntohl(svc_getu32(argv));
+	flavor = svc_getnl(argv);
 	if (flavor != RPC_AUTH_GSS)
 		return SVC_DENIED;
 	if (svc_safe_getnetobj(argv, &checksum))
@@ -689,7 +689,7 @@ gss_write_null_verf(struct svc_rqst *rqstp)
 {
 	u32     *p;
 
-	svc_putu32(rqstp->rq_res.head, htonl(RPC_AUTH_NULL));
+	svc_putnl(rqstp->rq_res.head, RPC_AUTH_NULL);
 	p = rqstp->rq_res.head->iov_base + rqstp->rq_res.head->iov_len;
 	/* don't really need to check if head->iov_len > PAGE_SIZE ... */
 	*p++ = 0;
@@ -708,7 +708,7 @@ gss_write_verf(struct svc_rqst *rqstp, struct gss_ctx *ctx_id, u32 seq)
 	u32			*p;
 	struct kvec		iov;
 
-	svc_putu32(rqstp->rq_res.head, htonl(RPC_AUTH_GSS));
+	svc_putnl(rqstp->rq_res.head, RPC_AUTH_GSS);
 	xdr_seq = htonl(seq);
 
 	iov.iov_base = &xdr_seq;
@@ -805,7 +805,7 @@ unwrap_integ_data(struct xdr_buf *buf, u32 seq, struct gss_ctx *ctx)
 	struct xdr_netobj mic;
 	struct xdr_buf integ_buf;
 
-	integ_len = ntohl(svc_getu32(&buf->head[0]));
+	integ_len = svc_getnl(&buf->head[0]);
 	if (integ_len & 3)
 		goto out;
 	if (integ_len > buf->len)
@@ -825,7 +825,7 @@ unwrap_integ_data(struct xdr_buf *buf, u32 seq, struct gss_ctx *ctx)
 	maj_stat = gss_verify_mic(ctx, &integ_buf, &mic);
 	if (maj_stat != GSS_S_COMPLETE)
 		goto out;
-	if (ntohl(svc_getu32(&buf->head[0])) != seq)
+	if (svc_getnl(&buf->head[0]) != seq)
 		goto out;
 	stat = 0;
 out:
@@ -857,7 +857,7 @@ unwrap_priv_data(struct svc_rqst *rqstp, struct xdr_buf *buf, u32 seq, struct gs
 
 	rqstp->rq_sendfile_ok = 0;
 
-	priv_len = ntohl(svc_getu32(&buf->head[0]));
+	priv_len = svc_getnl(&buf->head[0]);
 	if (rqstp->rq_deferred) {
 		/* Already decrypted last time through! The sequence number
 		 * check at out_seq is unnecessary but harmless: */
@@ -895,7 +895,7 @@ unwrap_priv_data(struct svc_rqst *rqstp, struct xdr_buf *buf, u32 seq, struct gs
 	if (maj_stat != GSS_S_COMPLETE)
 		return -EINVAL;
 out_seq:
-	if (ntohl(svc_getu32(&buf->head[0])) != seq)
+	if (svc_getnl(&buf->head[0]) != seq)
 		return -EINVAL;
 	return 0;
 }
@@ -985,12 +985,12 @@ svcauth_gss_accept(struct svc_rqst *rqstp, u32 *authp)
 
 	if (argv->iov_len < 5 * 4)
 		goto auth_err;
-	crlen = ntohl(svc_getu32(argv));
-	if (ntohl(svc_getu32(argv)) != RPC_GSS_VERSION)
+	crlen = svc_getnl(argv);
+	if (svc_getnl(argv) != RPC_GSS_VERSION)
 		goto auth_err;
-	gc->gc_proc = ntohl(svc_getu32(argv));
-	gc->gc_seq = ntohl(svc_getu32(argv));
-	gc->gc_svc = ntohl(svc_getu32(argv));
+	gc->gc_proc = svc_getnl(argv);
+	gc->gc_seq = svc_getnl(argv);
+	gc->gc_svc = svc_getnl(argv);
 	if (svc_safe_getnetobj(argv, &gc->gc_ctx))
 		goto auth_err;
 	if (crlen != round_up_to_quad(gc->gc_ctx.len) + 5 * 4)
@@ -1016,9 +1016,9 @@ svcauth_gss_accept(struct svc_rqst *rqstp, u32 *authp)
 	case RPC_GSS_PROC_CONTINUE_INIT:
 		if (argv->iov_len < 2 * 4)
 			goto auth_err;
-		if (ntohl(svc_getu32(argv)) != RPC_AUTH_NULL)
+		if (svc_getnl(argv) != RPC_AUTH_NULL)
 			goto auth_err;
-		if (ntohl(svc_getu32(argv)) != 0)
+		if (svc_getnl(argv) != 0)
 			goto auth_err;
 		break;
 	case RPC_GSS_PROC_DATA:
@@ -1076,14 +1076,14 @@ svcauth_gss_accept(struct svc_rqst *rqstp, u32 *authp)
 				goto drop;
 			if (resv->iov_len + 4 > PAGE_SIZE)
 				goto drop;
-			svc_putu32(resv, rpc_success);
+			svc_putnl(resv, RPC_SUCCESS);
 			if (svc_safe_putnetobj(resv, &rsip->out_handle))
 				goto drop;
 			if (resv->iov_len + 3 * 4 > PAGE_SIZE)
 				goto drop;
-			svc_putu32(resv, htonl(rsip->major_status));
-			svc_putu32(resv, htonl(rsip->minor_status));
-			svc_putu32(resv, htonl(GSS_SEQ_WIN));
+			svc_putnl(resv, rsip->major_status);
+			svc_putnl(resv, rsip->minor_status);
+			svc_putnl(resv, GSS_SEQ_WIN);
 			if (svc_safe_putnetobj(resv, &rsip->out_token))
 				goto drop;
 			rqstp->rq_client = NULL;
@@ -1093,7 +1093,7 @@ svcauth_gss_accept(struct svc_rqst *rqstp, u32 *authp)
 		set_bit(CACHE_NEGATIVE, &rsci->h.flags);
 		if (resv->iov_len + 4 > PAGE_SIZE)
 			goto drop;
-		svc_putu32(resv, rpc_success);
+		svc_putnl(resv, RPC_SUCCESS);
 		goto complete;
 	case RPC_GSS_PROC_DATA:
 		*authp = rpcsec_gsserr_ctxproblem;
@@ -1111,8 +1111,8 @@ svcauth_gss_accept(struct svc_rqst *rqstp, u32 *authp)
 				goto auth_err;
 			/* placeholders for length and seq. number: */
 			svcdata->body_start = resv->iov_base + resv->iov_len;
-			svc_putu32(resv, 0);
-			svc_putu32(resv, 0);
+			svc_putnl(resv, 0);
+			svc_putnl(resv, 0);
 			break;
 		case RPC_GSS_SVC_PRIVACY:
 			if (unwrap_priv_data(rqstp, &rqstp->rq_arg,
@@ -1120,8 +1120,8 @@ svcauth_gss_accept(struct svc_rqst *rqstp, u32 *authp)
 				goto auth_err;
 			/* placeholders for length and seq. number: */
 			svcdata->body_start = resv->iov_base + resv->iov_len;
-			svc_putu32(resv, 0);
-			svc_putu32(resv, 0);
+			svc_putnl(resv, 0);
+			svc_putnl(resv, 0);
 			break;
 		default:
 			goto auth_err;
@@ -1199,7 +1199,7 @@ svcauth_gss_wrap_resp_integ(struct svc_rqst *rqstp)
 	mic.data = (u8 *)resv->iov_base + resv->iov_len + 4;
 	if (gss_get_mic(gsd->rsci->mechctx, &integ_buf, &mic))
 		goto out_err;
-	svc_putu32(resv, htonl(mic.len));
+	svc_putnl(resv, mic.len);
 	memset(mic.data + mic.len, 0,
 			round_up_to_quad(mic.len) - mic.len);
 	resv->iov_len += XDR_QUADLEN(mic.len) << 2;

net/sunrpc/svc.c

@@ -284,16 +284,16 @@ svc_process(struct svc_serv *serv, struct svc_rqst *rqstp)
 	rqstp->rq_sendfile_ok = 1;
 	/* tcp needs a space for the record length... */
 	if (rqstp->rq_prot == IPPROTO_TCP)
-		svc_putu32(resv, 0);
+		svc_putnl(resv, 0);
 
 	rqstp->rq_xid = svc_getu32(argv);
 	svc_putu32(resv, rqstp->rq_xid);
 
-	dir  = ntohl(svc_getu32(argv));
-	vers = ntohl(svc_getu32(argv));
+	dir  = svc_getnl(argv);
+	vers = svc_getnl(argv);
 
 	/* First words of reply: */
-	svc_putu32(resv, xdr_one);		/* REPLY */
+	svc_putnl(resv, 1);		/* REPLY */
 
 	if (dir != 0)		/* direction != CALL */
 		goto err_bad_dir;
@@ -303,11 +303,11 @@ svc_process(struct svc_serv *serv, struct svc_rqst *rqstp)
 	/* Save position in case we later decide to reject: */
 	accept_statp = resv->iov_base + resv->iov_len;
 
-	svc_putu32(resv, xdr_zero);		/* ACCEPT */
+	svc_putnl(resv, 0);		/* ACCEPT */
 
-	rqstp->rq_prog = prog = ntohl(svc_getu32(argv));	/* program number */
-	rqstp->rq_vers = vers = ntohl(svc_getu32(argv));	/* version number */
-	rqstp->rq_proc = proc = ntohl(svc_getu32(argv));	/* procedure number */
+	rqstp->rq_prog = prog = svc_getnl(argv);	/* program number */
+	rqstp->rq_vers = vers = svc_getnl(argv);	/* version number */
+	rqstp->rq_proc = proc = svc_getnl(argv);	/* procedure number */
 
 	progp = serv->sv_program;
 
@@ -361,7 +361,7 @@ svc_process(struct svc_serv *serv, struct svc_rqst *rqstp)
 
 	/* Build the reply header. */
 	statp = resv->iov_base +resv->iov_len;
-	svc_putu32(resv, rpc_success);		/* RPC_SUCCESS */
+	svc_putnl(resv, RPC_SUCCESS);
 
 	/* Bump per-procedure stats counter */
 	procp->pc_count++;
@@ -439,10 +439,10 @@ svc_process(struct svc_serv *serv, struct svc_rqst *rqstp)
 
 err_bad_rpc:
 	serv->sv_stats->rpcbadfmt++;
-	svc_putu32(resv, xdr_one);	/* REJECT */
-	svc_putu32(resv, xdr_zero);	/* RPC_MISMATCH */
-	svc_putu32(resv, xdr_two);	/* Only RPCv2 supported */
-	svc_putu32(resv, xdr_two);
+	svc_putnl(resv, 1);	/* REJECT */
+	svc_putnl(resv, 0);	/* RPC_MISMATCH */
+	svc_putnl(resv, 2);	/* Only RPCv2 supported */
+	svc_putnl(resv, 2);
 	goto sendit;
 
 err_bad_auth:
@@ -450,15 +450,15 @@ svc_process(struct svc_serv *serv, struct svc_rqst *rqstp)
 	serv->sv_stats->rpcbadauth++;
 	/* Restore write pointer to location of accept status: */
 	xdr_ressize_check(rqstp, accept_statp);
-	svc_putu32(resv, xdr_one);	/* REJECT */
-	svc_putu32(resv, xdr_one);	/* AUTH_ERROR */
-	svc_putu32(resv, auth_stat);	/* status */
+	svc_putnl(resv, 1);	/* REJECT */
+	svc_putnl(resv, 1);	/* AUTH_ERROR */
+	svc_putnl(resv, ntohl(auth_stat));	/* status */
 	goto sendit;
 
 err_bad_prog:
 	dprintk("svc: unknown program %d\n", prog);
 	serv->sv_stats->rpcbadfmt++;
-	svc_putu32(resv, rpc_prog_unavail);
+	svc_putnl(resv, RPC_PROG_UNAVAIL);
 	goto sendit;
 
 err_bad_vers:
@@ -466,9 +466,9 @@ svc_process(struct svc_serv *serv, struct svc_rqst *rqstp)
 	printk("svc: unknown version (%d)\n", vers);
 #endif
 	serv->sv_stats->rpcbadfmt++;
-	svc_putu32(resv, rpc_prog_mismatch);
-	svc_putu32(resv, htonl(progp->pg_lovers));
-	svc_putu32(resv, htonl(progp->pg_hivers));
+	svc_putnl(resv, RPC_PROG_MISMATCH);
+	svc_putnl(resv, progp->pg_lovers);
+	svc_putnl(resv, progp->pg_hivers);
 	goto sendit;
 
 err_bad_proc:
@@ -476,7 +476,7 @@ svc_process(struct svc_serv *serv, struct svc_rqst *rqstp)
 	printk("svc: unknown procedure (%d)\n", proc);
 #endif
 	serv->sv_stats->rpcbadfmt++;
-	svc_putu32(resv, rpc_proc_unavail);
+	svc_putnl(resv, RPC_PROC_UNAVAIL);
 	goto sendit;
 
 err_garbage:
@@ -486,6 +486,6 @@ svc_process(struct svc_serv *serv, struct svc_rqst *rqstp)
 	rpc_stat = rpc_garbage_args;
 err_bad:
 	serv->sv_stats->rpcbadfmt++;
-	svc_putu32(resv, rpc_stat);
+	svc_putnl(resv, ntohl(rpc_stat));
 	goto sendit;
 }

net/sunrpc/svcauth.c

@@ -42,7 +42,7 @@ svc_authenticate(struct svc_rqst *rqstp, u32 *authp)
 
 	*authp = rpc_auth_ok;
 
-	flavor = ntohl(svc_getu32(&rqstp->rq_arg.head[0]));
+	flavor = svc_getnl(&rqstp->rq_arg.head[0]);
 
 	dprintk("svc: svc_authenticate (%d)\n", flavor);
 

net/sunrpc/svcauth_unix.c

@@ -427,7 +427,7 @@ svcauth_null_accept(struct svc_rqst *rqstp, u32 *authp)
 		*authp = rpc_autherr_badcred;
 		return SVC_DENIED;
 	}
-	if (svc_getu32(argv) != RPC_AUTH_NULL || svc_getu32(argv) != 0) {
+	if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) {
 		dprintk("svc: bad null verf\n");
 		*authp = rpc_autherr_badverf;
 		return SVC_DENIED;
@@ -441,8 +441,8 @@ svcauth_null_accept(struct svc_rqst *rqstp, u32 *authp)
 		return SVC_DROP; /* kmalloc failure - client must retry */
 
 	/* Put NULL verifier */
-	svc_putu32(resv, RPC_AUTH_NULL);
-	svc_putu32(resv, 0);
+	svc_putnl(resv, RPC_AUTH_NULL);
+	svc_putnl(resv, 0);
 
 	return SVC_OK;
 }
@@ -488,31 +488,31 @@ svcauth_unix_accept(struct svc_rqst *rqstp, u32 *authp)
 
 	svc_getu32(argv);			/* length */
 	svc_getu32(argv);			/* time stamp */
-	slen = XDR_QUADLEN(ntohl(svc_getu32(argv)));	/* machname length */
+	slen = XDR_QUADLEN(svc_getnl(argv));	/* machname length */
 	if (slen > 64 || (len -= (slen + 3)*4) < 0)
 		goto badcred;
 	argv->iov_base = (void*)((u32*)argv->iov_base + slen);	/* skip machname */
 	argv->iov_len -= slen*4;
 
-	cred->cr_uid = ntohl(svc_getu32(argv));		/* uid */
-	cred->cr_gid = ntohl(svc_getu32(argv));		/* gid */
-	slen = ntohl(svc_getu32(argv));			/* gids length */
+	cred->cr_uid = svc_getnl(argv);		/* uid */
+	cred->cr_gid = svc_getnl(argv);		/* gid */
+	slen = svc_getnl(argv);			/* gids length */
 	if (slen > 16 || (len -= (slen + 2)*4) < 0)
 		goto badcred;
 	cred->cr_group_info = groups_alloc(slen);
 	if (cred->cr_group_info == NULL)
 		return SVC_DROP;
 	for (i = 0; i < slen; i++)
-		GROUP_AT(cred->cr_group_info, i) = ntohl(svc_getu32(argv));
+		GROUP_AT(cred->cr_group_info, i) = svc_getnl(argv);
 
-	if (svc_getu32(argv) != RPC_AUTH_NULL || svc_getu32(argv) != 0) {
+	if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) {
 		*authp = rpc_autherr_badverf;
 		return SVC_DENIED;
 	}
 
 	/* Put NULL verifier */
-	svc_putu32(resv, RPC_AUTH_NULL);
-	svc_putu32(resv, 0);
+	svc_putnl(resv, RPC_AUTH_NULL);
+	svc_putnl(resv, 0);
 
 	return SVC_OK;