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@xxxxxxxxxx>
Tested-by: J. Bruce Fields <bfields@xxxxxxxxxx>
---
net/sunrpc/rpcb_clnt.c | 60 +++++++++++++++++-------------------------------
1 files changed, 21 insertions(+), 39 deletions(-)
diff --git a/net/sunrpc/rpcb_clnt.c b/net/sunrpc/rpcb_clnt.c
index fa6d7ca..d2a2ea0 100644
--- a/net/sunrpc/rpcb_clnt.c
+++ b/net/sunrpc/rpcb_clnt.c
@@ -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,
--
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