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svcrpc: delay minimum-rpc-size check till later 

Soon we want to support multiple fragments, in which case it may be
legal for a single fragment to be smaller than 8 bytes, so we'll want to
delay this check till we've reached the last fragment.

Also fix an outdated comment.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields 2012-12-03 16:30:42 -05:00
parent cc248d4b1d
commit ad46ccf094
1 changed files with 7 additions and 9 deletions
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16
net/sunrpc/svcsock.c
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@ -921,10 +921,8 @@ out:
}
/*
* Receive data.
* Receive fragment record header.
* If we haven't gotten the record length yet, get the next four bytes.
* Otherwise try to gobble up as much as possible up to the complete
* record length.
*/
static int svc_tcp_recv_record(struct svc_sock *svsk, struct svc_rqst *rqstp)
{
@ -968,9 +966,6 @@ static int svc_tcp_recv_record(struct svc_sock *svsk, struct svc_rqst *rqstp)
}
}
if (svc_sock_reclen(svsk) < 8)
goto err_delete; /* client is nuts. */
return svc_sock_reclen(svsk);
error:
dprintk("RPC: TCP recv_record got %d\n", len);
@ -1076,12 +1071,15 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp)
if (len != want) {
svc_tcp_save_pages(svsk, rqstp);
if (len < 0 && len != -EAGAIN)
goto err_other;
goto err_delete;
dprintk("svc: incomplete TCP record (%d of %d)\n",
svsk->sk_tcplen, svc_sock_reclen(svsk));
goto err_noclose;
}
if (svc_sock_reclen(svsk) < 8)
goto err_delete; /* client is nuts. */
rqstp->rq_arg.len = svc_sock_reclen(svsk);
rqstp->rq_arg.page_base = 0;
if (rqstp->rq_arg.len <= rqstp->rq_arg.head[0].iov_len) {
@ -1117,10 +1115,10 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp)
error:
if (len != -EAGAIN)
goto err_other;
goto err_delete;
dprintk("RPC: TCP recvfrom got EAGAIN\n");
return 0;
err_other:
err_delete:
printk(KERN_NOTICE "%s: recvfrom returned errno %d\n",
svsk->sk_xprt.xpt_server->sv_name, -len);
set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);