fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / fs / nfs / callback.c

diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index fcd9740..7933e2e 100644 (file)
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -6,7 +6,6 @@
  * NFSv4 callback handling
  */
 
-#include <linux/config.h>
 #include <linux/completion.h>
 #include <linux/ip.h>
 #include <linux/module.h>
@@ -14,11 +13,13 @@
 #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
 
@@ -31,18 +32,32 @@ struct nfs_callback_data {
 };
 
 static struct nfs_callback_data nfs_callback_info;
-static DECLARE_MUTEX(nfs_callback_sema);
+static DEFINE_MUTEX(nfs_callback_mutex);
 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.
  */
 static void nfs_callback_svc(struct svc_rqst *rqstp)
 {
-       struct svc_serv *serv = rqstp->rq_server;
        int err;
 
        __module_get(THIS_MODULE);
@@ -55,11 +70,16 @@ static void nfs_callback_svc(struct svc_rqst *rqstp)
 
        complete(&nfs_callback_info.started);
 
-       while (nfs_callback_info.users != 0 || !signalled()) {
+       for(;;) {
+               if (signalled()) {
+                       if (nfs_callback_info.users == 0)
+                               break;
+                       flush_signals(current);
+               }
                /*
                 * Listen for a request on the socket
                 */
-               err = svc_recv(serv, rqstp, MAX_SCHEDULE_TIMEOUT);
+               err = svc_recv(rqstp, MAX_SCHEDULE_TIMEOUT);
                if (err == -EAGAIN || err == -EINTR)
                        continue;
                if (err < 0) {
@@ -70,9 +90,10 @@ static void nfs_callback_svc(struct svc_rqst *rqstp)
                }
                dprintk("%s: request from %u.%u.%u.%u\n", __FUNCTION__,
                                NIPQUAD(rqstp->rq_addr.sin_addr.s_addr));
-               svc_process(serv, rqstp);
+               svc_process(rqstp);
        }
 
+       svc_exit_thread(rqstp);
        nfs_callback_info.pid = 0;
        complete(&nfs_callback_info.stopped);
        unlock_kernel();
@@ -89,12 +110,12 @@ int nfs_callback_up(void)
        int ret = 0;
 
        lock_kernel();
-       down(&nfs_callback_sema);
+       mutex_lock(&nfs_callback_mutex);
        if (nfs_callback_info.users++ || nfs_callback_info.pid != 0)
                goto out;
        init_completion(&nfs_callback_info.started);
        init_completion(&nfs_callback_info.stopped);
-       serv = svc_create(&nfs4_callback_program, NFS4_CALLBACK_BUFSIZE);
+       serv = svc_create(&nfs4_callback_program, NFS4_CALLBACK_BUFSIZE, NULL);
        ret = -ENOMEM;
        if (!serv)
                goto out_err;
@@ -115,7 +136,7 @@ int nfs_callback_up(void)
        nfs_callback_info.serv = serv;
        wait_for_completion(&nfs_callback_info.started);
 out:
-       up(&nfs_callback_sema);
+       mutex_unlock(&nfs_callback_mutex);
        unlock_kernel();
        return ret;
 out_destroy:
@@ -128,33 +149,32 @@ out_err:
 /*
  * Kill the server process if it is not already up.
  */
-int nfs_callback_down(void)
+void nfs_callback_down(void)
 {
-       int ret = 0;
-
        lock_kernel();
-       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);
+       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);
        unlock_kernel();
-       return ret;
 }
 
 static int nfs_callback_authenticate(struct svc_rqst *rqstp)
 {
-       struct in_addr *addr = &rqstp->rq_addr.sin_addr;
-       struct nfs4_client *clp;
+       struct sockaddr_in *addr = &rqstp->rq_addr;
+       struct nfs_client *clp;
 
        /* Don't talk to strangers */
-       clp = nfs4_find_client(addr);
+       clp = nfs_find_client(addr, 4);
        if (clp == NULL)
                return SVC_DROP;
-       dprintk("%s: %u.%u.%u.%u NFSv4 callback!\n", __FUNCTION__, NIPQUAD(addr));
-       nfs4_put_client(clp);
+       dprintk("%s: %u.%u.%u.%u NFSv4 callback!\n", __FUNCTION__, NIPQUAD(addr->sin_addr));
+       nfs_put_client(clp);
        switch (rqstp->rq_authop->flavour) {
                case RPC_AUTH_NULL:
                        if (rqstp->rq_proc != CB_NULL)
@@ -173,8 +193,6 @@ static int nfs_callback_authenticate(struct svc_rqst *rqstp)
 /*
  * Define NFS4 callback program
  */
-extern struct svc_version nfs4_callback_version1;
-
 static struct svc_version *nfs4_callback_version[] = {
        [1] = &nfs4_callback_version1,
 };