+ int rv = 0;
+ mutex_lock(&nfsd_mutex);
+ if (nfsd_serv)
+ rv = nfsd_serv->sv_nrthreads;
+ mutex_unlock(&nfsd_mutex);
+ return rv;
+}
+
+static void nfsd_last_thread(struct svc_serv *serv)
+{
+ /* When last nfsd thread exits we need to do some clean-up */
+ struct svc_xprt *xprt;
+ list_for_each_entry(xprt, &serv->sv_permsocks, xpt_list)
+ lockd_down();
+ nfsd_serv = NULL;
+ nfsd_racache_shutdown();
+ nfs4_state_shutdown();
+
+ printk(KERN_WARNING "nfsd: last server has exited, flushing export "
+ "cache\n");
+ nfsd_export_flush();
+}
+
+void nfsd_reset_versions(void)
+{
+ int found_one = 0;
+ int i;
+
+ for (i = NFSD_MINVERS; i < NFSD_NRVERS; i++) {
+ if (nfsd_program.pg_vers[i])
+ found_one = 1;
+ }
+
+ if (!found_one) {
+ for (i = NFSD_MINVERS; i < NFSD_NRVERS; i++)
+ nfsd_program.pg_vers[i] = nfsd_version[i];
+#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
+ for (i = NFSD_ACL_MINVERS; i < NFSD_ACL_NRVERS; i++)
+ nfsd_acl_program.pg_vers[i] =
+ nfsd_acl_version[i];
+#endif
+ }
+}
+
+/*
+ * Each session guarantees a negotiated per slot memory cache for replies
+ * which in turn consumes memory beyond the v2/v3/v4.0 server. A dedicated
+ * NFSv4.1 server might want to use more memory for a DRC than a machine
+ * with mutiple services.
+ *
+ * Impose a hard limit on the number of pages for the DRC which varies
+ * according to the machines free pages. This is of course only a default.
+ *
+ * For now this is a #defined shift which could be under admin control
+ * in the future.
+ */
+static void set_max_drc(void)
+{
+ #define NFSD_DRC_SIZE_SHIFT 10
+ nfsd_drc_max_mem = (nr_free_buffer_pages()
+ >> NFSD_DRC_SIZE_SHIFT) * PAGE_SIZE;
+ nfsd_drc_mem_used = 0;
+ spin_lock_init(&nfsd_drc_lock);
+ dprintk("%s nfsd_drc_max_mem %u \n", __func__, nfsd_drc_max_mem);
+}
+
+int nfsd_create_serv(void)
+{
+ int err = 0;
+
+ WARN_ON(!mutex_is_locked(&nfsd_mutex));
+ if (nfsd_serv) {
+ svc_get(nfsd_serv);
+ return 0;
+ }
+ if (nfsd_max_blksize == 0) {
+ /* choose a suitable default */
+ struct sysinfo i;
+ si_meminfo(&i);
+ /* Aim for 1/4096 of memory per thread
+ * This gives 1MB on 4Gig machines
+ * But only uses 32K on 128M machines.
+ * Bottom out at 8K on 32M and smaller.
+ * Of course, this is only a default.
+ */
+ nfsd_max_blksize = NFSSVC_MAXBLKSIZE;
+ i.totalram <<= PAGE_SHIFT - 12;
+ while (nfsd_max_blksize > i.totalram &&
+ nfsd_max_blksize >= 8*1024*2)
+ nfsd_max_blksize /= 2;
+ }
+
+ nfsd_serv = svc_create_pooled(&nfsd_program, nfsd_max_blksize,
+ nfsd_last_thread, nfsd, THIS_MODULE);
+ if (nfsd_serv == NULL)
+ err = -ENOMEM;
+ else
+ set_max_drc();
+
+ do_gettimeofday(&nfssvc_boot); /* record boot time */
+ return err;
+}
+
+static int nfsd_init_socks(int port)
+{
+ int error;
+ if (!list_empty(&nfsd_serv->sv_permsocks))
+ return 0;
+
+ error = svc_create_xprt(nfsd_serv, "udp", PF_INET, port,
+ SVC_SOCK_DEFAULTS);
+ if (error < 0)
+ return error;
+
+ error = lockd_up();
+ if (error < 0)
+ return error;
+
+ error = svc_create_xprt(nfsd_serv, "tcp", PF_INET, port,
+ SVC_SOCK_DEFAULTS);
+ if (error < 0)
+ return error;
+
+ error = lockd_up();
+ if (error < 0)
+ return error;
+
+ return 0;
+}
+
+int nfsd_nrpools(void)
+{