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[PATCH] knfsd: SUNRPC: allow creating an RPC service without registering with portmapper 

Sometimes we need to create an RPC service but not register it with the local
portmapper.  NFSv4 delegation callback, for example.

Change the svc_makesock() API to allow optionally creating temporary or
permanent sockets, optionally registering with the local portmapper, and make
it return the ephemeral port of the new socket.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Chuck Lever 2007-02-12 00:53:29 -08:00 committed by Linus Torvalds
parent 6b174337e5
commit 482fb94e1b
5 changed files with 34 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
fs/lockd/svc.c
View File

@ -223,23 +223,29 @@ static int find_socket(struct svc_serv *serv, int proto)
return found;
}
/*
* Make any sockets that are needed but not present.
* If nlm_udpport or nlm_tcpport were set as module
* options, make those sockets unconditionally
*/
static int make_socks(struct svc_serv *serv, int proto)
{
/* Make any sockets that are needed but not present.
* If nlm_udpport or nlm_tcpport were set as module
* options, make those sockets unconditionally
*/
static int warned;
static int warned;
int err = 0;
if (proto == IPPROTO_UDP || nlm_udpport)
if (!find_socket(serv, IPPROTO_UDP))
err = svc_makesock(serv, IPPROTO_UDP, nlm_udpport);
if (err == 0 && (proto == IPPROTO_TCP || nlm_tcpport))
err = svc_makesock(serv, IPPROTO_UDP, nlm_udpport,
SVC_SOCK_DEFAULTS);
if (err >= 0 && (proto == IPPROTO_TCP || nlm_tcpport))
if (!find_socket(serv, IPPROTO_TCP))
err= svc_makesock(serv, IPPROTO_TCP, nlm_tcpport);
if (!err)
err = svc_makesock(serv, IPPROTO_TCP, nlm_tcpport,
SVC_SOCK_DEFAULTS);
if (err >= 0) {
warned = 0;
else if (warned++ == 0)
err = 0;
} else if (warned++ == 0)
printk(KERN_WARNING
"lockd_up: makesock failed, error=%d\n", err);
return err;

20
fs/nfs/callback.c
View File

@ -106,7 +106,6 @@ static void nfs_callback_svc(struct svc_rqst *rqstp)
int nfs_callback_up(void)
{
struct svc_serv *serv;
struct svc_sock *svsk;
int ret = 0;
lock_kernel();
@ -119,17 +118,14 @@ int nfs_callback_up(void)
ret = -ENOMEM;
if (!serv)
goto out_err;
/* FIXME: We don't want to register this socket with the portmapper */
ret = svc_makesock(serv, IPPROTO_TCP, nfs_callback_set_tcpport);
if (ret < 0)
ret = svc_makesock(serv, IPPROTO_TCP, nfs_callback_set_tcpport,
SVC_SOCK_ANONYMOUS);
if (ret <= 0)
goto out_destroy;
if (!list_empty(&serv->sv_permsocks)) {
svsk = list_entry(serv->sv_permsocks.next,
struct svc_sock, sk_list);
nfs_callback_tcpport = ntohs(inet_sk(svsk->sk_sk)->sport);
dprintk ("Callback port = 0x%x\n", nfs_callback_tcpport);
} else
BUG();
nfs_callback_tcpport = ret;
dprintk("Callback port = 0x%x\n", nfs_callback_tcpport);
ret = svc_create_thread(nfs_callback_svc, serv);
if (ret < 0)
goto out_destroy;
@ -140,6 +136,8 @@ out:
unlock_kernel();
return ret;
out_destroy:
dprintk("Couldn't create callback socket or server thread; err = %d\n",
ret);
svc_destroy(serv);
out_err:
nfs_callback_info.users--;

6
fs/nfsd/nfssvc.c
View File

@ -235,7 +235,8 @@ static int nfsd_init_socks(int port)
error = lockd_up(IPPROTO_UDP);
if (error >= 0) {
error = svc_makesock(nfsd_serv, IPPROTO_UDP, port);
error = svc_makesock(nfsd_serv, IPPROTO_UDP, port,
SVC_SOCK_DEFAULTS);
if (error < 0)
lockd_down();
}
@ -245,7 +246,8 @@ static int nfsd_init_socks(int port)
#ifdef CONFIG_NFSD_TCP
error = lockd_up(IPPROTO_TCP);
if (error >= 0) {
error = svc_makesock(nfsd_serv, IPPROTO_TCP, port);
error = svc_makesock(nfsd_serv, IPPROTO_TCP, port,
SVC_SOCK_DEFAULTS);
if (error < 0)
lockd_down();
}

2
include/linux/sunrpc/svcsock.h
View File

@ -62,7 +62,7 @@ struct svc_sock {
/*
* Function prototypes.
*/
int svc_makesock(struct svc_serv *, int, unsigned short);
int svc_makesock(struct svc_serv *, int, unsigned short, int flags);
void svc_close_socket(struct svc_sock *);
int svc_recv(struct svc_rqst *, long);
int svc_send(struct svc_rqst *);

6
net/sunrpc/svcsock.c
View File

@ -1689,9 +1689,11 @@ void svc_close_socket(struct svc_sock *svsk)
* @serv: RPC server structure
* @protocol: transport protocol to use
* @port: port to use
* @flags: requested socket characteristics
*
*/
int svc_makesock(struct svc_serv *serv, int protocol, unsigned short port)
int svc_makesock(struct svc_serv *serv, int protocol, unsigned short port,
int flags)
{
struct sockaddr_in sin = {
.sin_family = AF_INET,
@ -1700,7 +1702,7 @@ int svc_makesock(struct svc_serv *serv, int protocol, unsigned short port)
};
dprintk("svc: creating socket proto = %d\n", protocol);
return svc_create_socket(serv, protocol, &sin, SVC_SOCK_DEFAULTS);
return svc_create_socket(serv, protocol, &sin, flags);
}
/*