* NFSv4 callback handling
*/
+#include <linux/config.h>
#include <linux/completion.h>
#include <linux/ip.h>
#include <linux/module.h>
#include <linux/sunrpc/svc.h>
#include <linux/sunrpc/svcsock.h>
#include <linux/nfs_fs.h>
-#include <linux/mutex.h>
#include <net/inet_sock.h>
#include "nfs4_fs.h"
#include "callback.h"
-#include "internal.h"
#define NFSDBG_FACILITY NFSDBG_CALLBACK
};
static struct nfs_callback_data nfs_callback_info;
-static DEFINE_MUTEX(nfs_callback_mutex);
+static DECLARE_MUTEX(nfs_callback_sema);
static struct svc_program nfs4_callback_program;
unsigned int nfs_callback_set_tcpport;
unsigned short nfs_callback_tcpport;
-static const int nfs_set_port_min = 0;
-static const int nfs_set_port_max = 65535;
-
-static int param_set_port(const char *val, struct kernel_param *kp)
-{
- char *endp;
- int num = simple_strtol(val, &endp, 0);
- if (endp == val || *endp || num < nfs_set_port_min || num > nfs_set_port_max)
- return -EINVAL;
- *((int *)kp->arg) = num;
- return 0;
-}
-
-module_param_call(callback_tcpport, param_set_port, param_get_int,
- &nfs_callback_set_tcpport, 0644);
/*
* This is the callback kernel thread.
complete(&nfs_callback_info.started);
- for(;;) {
- if (signalled()) {
- if (nfs_callback_info.users == 0)
- break;
- flush_signals(current);
- }
+ while (nfs_callback_info.users != 0 || !signalled()) {
/*
* Listen for a request on the socket
*/
svc_process(serv, rqstp);
}
- svc_exit_thread(rqstp);
nfs_callback_info.pid = 0;
complete(&nfs_callback_info.stopped);
unlock_kernel();
int ret = 0;
lock_kernel();
- mutex_lock(&nfs_callback_mutex);
+ down(&nfs_callback_sema);
if (nfs_callback_info.users++ || nfs_callback_info.pid != 0)
goto out;
init_completion(&nfs_callback_info.started);
nfs_callback_info.serv = serv;
wait_for_completion(&nfs_callback_info.started);
out:
- mutex_unlock(&nfs_callback_mutex);
+ up(&nfs_callback_sema);
unlock_kernel();
return ret;
out_destroy:
/*
* Kill the server process if it is not already up.
*/
-void nfs_callback_down(void)
+int nfs_callback_down(void)
{
+ int ret = 0;
+
lock_kernel();
- mutex_lock(&nfs_callback_mutex);
- nfs_callback_info.users--;
- do {
- if (nfs_callback_info.users != 0 || nfs_callback_info.pid == 0)
- break;
- if (kill_proc(nfs_callback_info.pid, SIGKILL, 1) < 0)
- break;
- } while (wait_for_completion_timeout(&nfs_callback_info.stopped, 5*HZ) == 0);
- mutex_unlock(&nfs_callback_mutex);
+ down(&nfs_callback_sema);
+ if (--nfs_callback_info.users || nfs_callback_info.pid == 0)
+ goto out;
+ kill_proc(nfs_callback_info.pid, SIGKILL, 1);
+ wait_for_completion(&nfs_callback_info.stopped);
+out:
+ up(&nfs_callback_sema);
unlock_kernel();
+ return ret;
}
static int nfs_callback_authenticate(struct svc_rqst *rqstp)
{
- struct sockaddr_in *addr = &rqstp->rq_addr;
- struct nfs_client *clp;
+ struct in_addr *addr = &rqstp->rq_addr.sin_addr;
+ struct nfs4_client *clp;
/* Don't talk to strangers */
- clp = nfs_find_client(addr, 4);
+ clp = nfs4_find_client(addr);
if (clp == NULL)
return SVC_DROP;
- dprintk("%s: %u.%u.%u.%u NFSv4 callback!\n", __FUNCTION__, NIPQUAD(addr->sin_addr));
- nfs_put_client(clp);
+ dprintk("%s: %u.%u.%u.%u NFSv4 callback!\n", __FUNCTION__, NIPQUAD(addr));
+ nfs4_put_client(clp);
switch (rqstp->rq_authop->flavour) {
case RPC_AUTH_NULL:
if (rqstp->rq_proc != CB_NULL)
/*
* Define NFS4 callback program
*/
+extern struct svc_version nfs4_callback_version1;
+
static struct svc_version *nfs4_callback_version[] = {
[1] = &nfs4_callback_version1,
};