static unsigned long nfsd_last_call;
static DEFINE_SPINLOCK(nfsd_call_lock);
-struct nfsd_list {
- struct list_head list;
- struct task_struct *task;
-};
-static struct list_head nfsd_list = LIST_HEAD_INIT(nfsd_list);
-
#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
static struct svc_stat nfsd_acl_svcstats;
static struct svc_version * nfsd_acl_version[] = {
int err = 0;
lock_kernel();
if (nfsd_serv) {
- nfsd_serv->sv_nrthreads++;
+ svc_get(nfsd_serv);
unlock_kernel();
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;
+ }
atomic_set(&nfsd_busy, 0);
- nfsd_serv = svc_create(&nfsd_program, NFSD_BUFSIZE,
- nfsd_last_thread);
+ nfsd_serv = svc_create_pooled(&nfsd_program,
+ NFSD_BUFSIZE - NFSSVC_MAXBLKSIZE + nfsd_max_blksize,
+ nfsd_last_thread,
+ nfsd, SIG_NOCLEAN, THIS_MODULE);
if (nfsd_serv == NULL)
err = -ENOMEM;
unlock_kernel();
if (!list_empty(&nfsd_serv->sv_permsocks))
return 0;
- error = svc_makesock(nfsd_serv, IPPROTO_UDP, port);
- if (error < 0)
- return error;
error = lockd_up(IPPROTO_UDP);
+ if (error >= 0) {
+ error = svc_makesock(nfsd_serv, IPPROTO_UDP, port);
+ if (error < 0)
+ lockd_down();
+ }
if (error < 0)
return error;
#ifdef CONFIG_NFSD_TCP
- error = svc_makesock(nfsd_serv, IPPROTO_TCP, port);
- if (error < 0)
- return error;
error = lockd_up(IPPROTO_TCP);
+ if (error >= 0) {
+ error = svc_makesock(nfsd_serv, IPPROTO_TCP, port);
+ if (error < 0)
+ lockd_down();
+ }
if (error < 0)
return error;
#endif
return 0;
}
+int nfsd_nrpools(void)
+{
+ if (nfsd_serv == NULL)
+ return 0;
+ else
+ return nfsd_serv->sv_nrpools;
+}
+
+int nfsd_get_nrthreads(int n, int *nthreads)
+{
+ int i = 0;
+
+ if (nfsd_serv != NULL) {
+ for (i = 0; i < nfsd_serv->sv_nrpools && i < n; i++)
+ nthreads[i] = nfsd_serv->sv_pools[i].sp_nrthreads;
+ }
+
+ return 0;
+}
+
+int nfsd_set_nrthreads(int n, int *nthreads)
+{
+ int i = 0;
+ int tot = 0;
+ int err = 0;
+
+ if (nfsd_serv == NULL || n <= 0)
+ return 0;
+
+ if (n > nfsd_serv->sv_nrpools)
+ n = nfsd_serv->sv_nrpools;
+
+ /* enforce a global maximum number of threads */
+ tot = 0;
+ for (i = 0; i < n; i++) {
+ if (nthreads[i] > NFSD_MAXSERVS)
+ nthreads[i] = NFSD_MAXSERVS;
+ tot += nthreads[i];
+ }
+ if (tot > NFSD_MAXSERVS) {
+ /* total too large: scale down requested numbers */
+ for (i = 0; i < n && tot > 0; i++) {
+ int new = nthreads[i] * NFSD_MAXSERVS / tot;
+ tot -= (nthreads[i] - new);
+ nthreads[i] = new;
+ }
+ for (i = 0; i < n && tot > 0; i++) {
+ nthreads[i]--;
+ tot--;
+ }
+ }
+
+ /*
+ * There must always be a thread in pool 0; the admin
+ * can't shut down NFS completely using pool_threads.
+ */
+ if (nthreads[0] == 0)
+ nthreads[0] = 1;
+
+ /* apply the new numbers */
+ lock_kernel();
+ svc_get(nfsd_serv);
+ for (i = 0; i < n; i++) {
+ err = svc_set_num_threads(nfsd_serv, &nfsd_serv->sv_pools[i],
+ nthreads[i]);
+ if (err)
+ break;
+ }
+ svc_destroy(nfsd_serv);
+ unlock_kernel();
+
+ return err;
+}
+
int
nfsd_svc(unsigned short port, int nrservs)
{
int error;
- struct list_head *victim;
lock_kernel();
dprintk("nfsd: creating service\n");
if (error)
goto failure;
- nrservs -= (nfsd_serv->sv_nrthreads-1);
- while (nrservs > 0) {
- nrservs--;
- __module_get(THIS_MODULE);
- error = svc_create_thread(nfsd, nfsd_serv);
- if (error < 0) {
- module_put(THIS_MODULE);
- break;
- }
- }
- victim = nfsd_list.next;
- while (nrservs < 0 && victim != &nfsd_list) {
- struct nfsd_list *nl =
- list_entry(victim,struct nfsd_list, list);
- victim = victim->next;
- send_sig(SIG_NOCLEAN, nl->task, 1);
- nrservs++;
- }
+ error = svc_set_num_threads(nfsd_serv, NULL, nrservs);
failure:
svc_destroy(nfsd_serv); /* Release server */
out:
static void
nfsd(struct svc_rqst *rqstp)
{
- struct svc_serv *serv = rqstp->rq_server;
struct fs_struct *fsp;
int err;
- struct nfsd_list me;
sigset_t shutdown_mask, allowed_mask;
/* Lock module and set up kernel thread */
nfsdstats.th_cnt++;
- me.task = current;
- list_add(&me.list, &nfsd_list);
+ rqstp->rq_task = current;
unlock_kernel();
* Find a socket with data available and call its
* recvfrom routine.
*/
- while ((err = svc_recv(serv, rqstp,
- 60*60*HZ)) == -EAGAIN)
+ while ((err = svc_recv(rqstp, 60*60*HZ)) == -EAGAIN)
;
if (err < 0)
break;
/* Process request with signals blocked. */
sigprocmask(SIG_SETMASK, &allowed_mask, NULL);
- svc_process(serv, rqstp);
+ svc_process(rqstp);
/* Unlock export hash tables */
exp_readunlock();
lock_kernel();
- list_del(&me.list);
nfsdstats.th_cnt --;
out:
projects / linux-2.6 / blobdiff