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SUNRPC: Avoid return code checking in rpcbind XDR encoder functions 

Clean up.

The trend in the other XDR encoder functions is to BUG() when encoding
problems occur, since a problem here is always due to a local coding
error.  Then, instead of a status, zero is unconditionally returned.

Update the rpcbind XDR encoders to behave this way.

To finish the update, use the new-style be32_to_cpup() and
cpu_to_be32() macros, and compute the buffer sizes using raw integers
instead of sizeof().  This matches the conventions used in other XDR
functions.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever 2010-12-14 14:58:59 +00:00 committed by Trond Myklebust
parent b43cd8c153
commit 4129ccf303
1 changed files with 21 additions and 39 deletions
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60
net/sunrpc/rpcb_clnt.c
View File

@ -705,14 +705,11 @@ static int rpcb_enc_mapping(struct rpc_rqst *req, __be32 *p,
xdr_init_encode(&xdr, &req->rq_snd_buf, p);
p = xdr_reserve_space(&xdr, sizeof(__be32) * RPCB_mappingargs_sz);
if (unlikely(p == NULL))
return -EIO;
*p++ = htonl(rpcb->r_prog);
*p++ = htonl(rpcb->r_vers);
*p++ = htonl(rpcb->r_prot);
*p = htonl(rpcb->r_port);
p = xdr_reserve_space(&xdr, RPCB_mappingargs_sz << 2);
*p++ = cpu_to_be32(rpcb->r_prog);
*p++ = cpu_to_be32(rpcb->r_vers);
*p++ = cpu_to_be32(rpcb->r_prot);
*p = cpu_to_be32(rpcb->r_port);
return 0;
}
@ -728,11 +725,11 @@ static int rpcb_dec_getport(struct rpc_rqst *req, __be32 *p,
rpcb->r_port = 0;
p = xdr_inline_decode(&xdr, sizeof(__be32));
p = xdr_inline_decode(&xdr, 4);
if (unlikely(p == NULL))
return -EIO;
port = ntohl(*p);
port = be32_to_cpup(p);
dprintk("RPC: %5u PMAP_%s result: %lu\n", task->tk_pid,
task->tk_msg.rpc_proc->p_name, port);
if (unlikely(port > USHRT_MAX))
@ -750,7 +747,7 @@ static int rpcb_dec_set(struct rpc_rqst *req, __be32 *p,
xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
p = xdr_inline_decode(&xdr, sizeof(__be32));
p = xdr_inline_decode(&xdr, 4);
if (unlikely(p == NULL))
return -EIO;
@ -764,24 +761,16 @@ static int rpcb_dec_set(struct rpc_rqst *req, __be32 *p,
return 0;
}
static int encode_rpcb_string(struct xdr_stream *xdr, const char *string,
const u32 maxstrlen)
static void encode_rpcb_string(struct xdr_stream *xdr, const char *string,
const u32 maxstrlen)
{
u32 len;
__be32 *p;
u32 len;
if (unlikely(string == NULL))
return -EIO;
len = strlen(string);
if (unlikely(len > maxstrlen))
return -EIO;
p = xdr_reserve_space(xdr, sizeof(__be32) + len);
if (unlikely(p == NULL))
return -EIO;
BUG_ON(len > maxstrlen);
p = xdr_reserve_space(xdr, 4 + len);
xdr_encode_opaque(p, string, len);
return 0;
}
static int rpcb_enc_getaddr(struct rpc_rqst *req, __be32 *p,
@ -797,20 +786,13 @@ static int rpcb_enc_getaddr(struct rpc_rqst *req, __be32 *p,
xdr_init_encode(&xdr, &req->rq_snd_buf, p);
p = xdr_reserve_space(&xdr,
sizeof(__be32) * (RPCB_program_sz + RPCB_version_sz));
if (unlikely(p == NULL))
return -EIO;
*p++ = htonl(rpcb->r_prog);
*p = htonl(rpcb->r_vers);
if (encode_rpcb_string(&xdr, rpcb->r_netid, RPCBIND_MAXNETIDLEN))
return -EIO;
if (encode_rpcb_string(&xdr, rpcb->r_addr, RPCBIND_MAXUADDRLEN))
return -EIO;
if (encode_rpcb_string(&xdr, rpcb->r_owner, RPCB_MAXOWNERLEN))
return -EIO;
p = xdr_reserve_space(&xdr, (RPCB_program_sz + RPCB_version_sz) << 2);
*p++ = cpu_to_be32(rpcb->r_prog);
*p = cpu_to_be32(rpcb->r_vers);
encode_rpcb_string(&xdr, rpcb->r_netid, RPCBIND_MAXNETIDLEN);
encode_rpcb_string(&xdr, rpcb->r_addr, RPCBIND_MAXUADDRLEN);
encode_rpcb_string(&xdr, rpcb->r_owner, RPCB_MAXOWNERLEN);
return 0;
}
@ -827,10 +809,10 @@ static int rpcb_dec_getaddr(struct rpc_rqst *req, __be32 *p,
xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
p = xdr_inline_decode(&xdr, sizeof(__be32));
p = xdr_inline_decode(&xdr, 4);
if (unlikely(p == NULL))
goto out_fail;
len = ntohl(*p);
len = be32_to_cpup(p);
/*
* If the returned universal address is a null string,