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SUNRPC: Update RPC server's TCP record marker decoder

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Clean up: Update the RPC server's TCP record marker decoder to match the
constructs used by the RPC client's TCP socket transport.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Chuck Lever 2008-04-14 12:27:30 -04:00 committed by J. Bruce Fields
parent b7872fe86d
commit c0401ea008
2 changed files with 14 additions and 14 deletions
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4
include/linux/sunrpc/svcsock.h
View File

@ -26,8 +26,8 @@ struct svc_sock {
void (*sk_owspace)(struct sock *);
/* private TCP part */
int sk_reclen; /* length of record */
int sk_tcplen; /* current read length */
u32 sk_reclen; /* length of record */
u32 sk_tcplen; /* current read length */
};
/*

24
net/sunrpc/svcsock.c
View File

@ -46,6 +46,7 @@
#include <linux/sunrpc/types.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/xdr.h>
#include <linux/sunrpc/msg_prot.h>
#include <linux/sunrpc/svcsock.h>
#include <linux/sunrpc/stats.h>
@ -823,8 +824,8 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp)
* the next four bytes. Otherwise try to gobble up as much as
* possible up to the complete record length.
*/
if (svsk->sk_tcplen < 4) {
unsigned long want = 4 - svsk->sk_tcplen;
if (svsk->sk_tcplen < sizeof(rpc_fraghdr)) {
int want = sizeof(rpc_fraghdr) - svsk->sk_tcplen;
struct kvec iov;
iov.iov_base = ((char *) &svsk->sk_reclen) + svsk->sk_tcplen;
@ -834,32 +835,31 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp)
svsk->sk_tcplen += len;
if (len < want) {
dprintk("svc: short recvfrom while reading record length (%d of %lu)\n",
len, want);
dprintk("svc: short recvfrom while reading record "
"length (%d of %d)\n", len, want);
svc_xprt_received(&svsk->sk_xprt);
return -EAGAIN; /* record header not complete */
}
svsk->sk_reclen = ntohl(svsk->sk_reclen);
if (!(svsk->sk_reclen & 0x80000000)) {
if (!(svsk->sk_reclen & RPC_LAST_STREAM_FRAGMENT)) {
/* FIXME: technically, a record can be fragmented,
* and non-terminal fragments will not have the top
* bit set in the fragment length header.
* But apparently no known nfs clients send fragmented
* records. */
if (net_ratelimit())
printk(KERN_NOTICE "RPC: bad TCP reclen 0x%08lx"
" (non-terminal)\n",
(unsigned long) svsk->sk_reclen);
printk(KERN_NOTICE "RPC: multiple fragments "
"per record not supported\n");
goto err_delete;
}
svsk->sk_reclen &= 0x7fffffff;
svsk->sk_reclen &= RPC_FRAGMENT_SIZE_MASK;
dprintk("svc: TCP record, %d bytes\n", svsk->sk_reclen);
if (svsk->sk_reclen > serv->sv_max_mesg) {
if (net_ratelimit())
printk(KERN_NOTICE "RPC: bad TCP reclen 0x%08lx"
" (large)\n",
(unsigned long) svsk->sk_reclen);
printk(KERN_NOTICE "RPC: "
"fragment too large: 0x%08lx\n",
(unsigned long)svsk->sk_reclen);
goto err_delete;
}
}