* Portal-RPC reconnection and replay operations, for use in recovery.
*
* Copyright (c) 2003 Cluster File Systems, Inc.
- * Author: Phil Schwan <phil@clusterfs.com>
+ * Authors: Phil Schwan <phil@clusterfs.com>
+ * Mike Shaver <shaver@clusterfs.com>
*
* This file is part of Lustre, http://www.lustre.org.
*
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+#ifndef __KERNEL__
+#include <liblustre.h>
+#else
#include <linux/version.h>
-
+#include <asm/semaphore.h>
#define DEBUG_SUBSYSTEM S_RPC
+#endif
+
#include <linux/obd_support.h>
#include <linux/obd_class.h>
#include "ptlrpc_internal.h"
+#ifdef __KERNEL__
+
static struct ptlrpc_thread *pinger_thread = NULL;
-static spinlock_t pinger_lock = SPIN_LOCK_UNLOCKED;
+static DECLARE_MUTEX(pinger_sem);
static struct list_head pinger_imports = LIST_HEAD_INIT(pinger_imports);
-int ptlrpc_pinger_add_import(struct obd_import *imp)
-{
- ENTRY;
- if (!list_empty(&imp->imp_pinger_chain))
- RETURN(-EALREADY);
-
- spin_lock(&pinger_lock);
- list_add(&imp->imp_pinger_chain, &pinger_imports);
- spin_unlock(&pinger_lock);
- RETURN(0);
-}
-
-int ptlrpc_pinger_del_import(struct obd_import *imp)
-{
- ENTRY;
- if (list_empty(&imp->imp_pinger_chain))
- RETURN(-EALREADY);
-
- spin_lock(&pinger_lock);
- list_del_init(&imp->imp_pinger_chain);
- spin_unlock(&pinger_lock);
- RETURN(0);
-}
-
-static void ptlrpc_pinger_do_stuff(void)
-{
-
-
-
-}
-
static int ptlrpc_pinger_main(void *arg)
{
struct ptlrpc_svc_data *data = (struct ptlrpc_svc_data *)arg;
struct ptlrpc_thread *thread = data->thread;
unsigned long flags;
- int rc = 0;
ENTRY;
lock_kernel();
RECALC_SIGPENDING;
SIGNAL_MASK_UNLOCK(current, flags);
-#if defined(__arch_um__) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,20))
- sprintf(current->comm, "%s|%d", data->name,current->thread.extern_pid);
-#elif defined(__arch_um__) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
- sprintf(current->comm, "%s|%d", data->name,
- current->thread.mode.tt.extern_pid);
-#else
- strcpy(current->comm, data->name);
-#endif
+ THREAD_NAME(current->comm, "%s", data->name);
unlock_kernel();
/* Record that the thread is running */
thread->t_flags = SVC_RUNNING;
wake_up(&thread->t_ctl_waitq);
- /* And now, loop forever on requests */
+ /* And now, loop forever, pinging as needed. */
while (1) {
- struct l_wait_info lwi = LWI_TIMEOUT(5 * HZ, NULL, NULL);
- l_wait_event(thread->t_ctl_waitq,
- thread->t_flags & SVC_STOPPING, &lwi);
+ unsigned long this_ping = jiffies;
+ long time_to_next_ping;
+ struct l_wait_info lwi = LWI_TIMEOUT(obd_timeout * HZ,
+ NULL, NULL);
+ struct ptlrpc_request_set *set;
+ struct ptlrpc_request *req;
+ struct list_head *iter;
+ wait_queue_t set_wait;
+ int rc;
+
+ set = ptlrpc_prep_set();
+ down(&pinger_sem);
+ list_for_each(iter, &pinger_imports) {
+ struct obd_import *imp =
+ list_entry(iter, struct obd_import,
+ imp_pinger_chain);
+ int generation, level;
+ unsigned long flags;
+
+ if (imp->imp_next_ping <= this_ping) {
+ /* Add a ping. */
+ spin_lock_irqsave(&imp->imp_lock, flags);
+ generation = imp->imp_generation;
+ level = imp->imp_state;
+ spin_unlock_irqrestore(&imp->imp_lock, flags);
+
+ if (level != LUSTRE_IMP_FULL) {
+ CDEBUG(D_HA,
+ "not pinging %s (in recovery)\n",
+ imp->imp_target_uuid.uuid);
+ continue;
+ }
+
+ req = ptlrpc_prep_req(imp, OBD_PING, 0, NULL,
+ NULL);
+ if (!req) {
+ CERROR("OOM trying to ping\n");
+ break;
+ }
+ req->rq_no_resend = 1;
+ req->rq_replen = lustre_msg_size(0, NULL);
+ req->rq_send_state = LUSTRE_IMP_FULL;
+ req->rq_phase = RQ_PHASE_RPC;
+ req->rq_import_generation = generation;
+ ptlrpc_set_add_req(set, req);
+ } else {
+ CDEBUG(D_HA, "don't need to ping %s (%lu > "
+ "%lu)\n", imp->imp_target_uuid.uuid,
+ imp->imp_next_ping, this_ping);
+ }
+ }
+ up(&pinger_sem);
+
+ /* Might be empty, that's OK. */
+ if (set->set_remaining == 0)
+ CDEBUG(D_HA, "nothing to ping\n");
+ list_for_each(iter, &set->set_requests) {
+ struct ptlrpc_request *req =
+ list_entry(iter, struct ptlrpc_request,
+ rq_set_chain);
+ DEBUG_REQ(D_HA, req, "pinging %s->%s",
+ req->rq_import->imp_obd->obd_uuid.uuid,
+ req->rq_import->imp_target_uuid.uuid);
+ (void)ptl_send_rpc(req);
+ }
+
+ /* Have to wait on both the thread's queue and the set's. */
+ init_waitqueue_entry(&set_wait, current);
+ add_wait_queue(&set->set_waitq, &set_wait);
+ rc = l_wait_event(thread->t_ctl_waitq,
+ thread->t_flags & SVC_STOPPING ||
+ ptlrpc_check_set(set),
+ &lwi);
+ remove_wait_queue(&set->set_waitq, &set_wait);
+ CDEBUG(D_HA, "ping complete (%lu)\n", jiffies);
if (thread->t_flags & SVC_STOPPING) {
thread->t_flags &= ~SVC_STOPPING;
+ list_for_each(iter, &set->set_requests) {
+ req = list_entry(iter, struct ptlrpc_request,
+ rq_set_chain);
+ if (!req->rq_replied)
+ ptlrpc_unregister_reply(req);
+ }
+ ptlrpc_set_destroy(set);
EXIT;
break;
}
- ptlrpc_pinger_do_stuff();
+
+ /* Expire all the requests that didn't come back. */
+ down(&pinger_sem);
+ list_for_each(iter, &set->set_requests) {
+ req = list_entry(iter, struct ptlrpc_request,
+ rq_set_chain);
+
+ if (req->rq_replied)
+ continue;
+
+ req->rq_phase = RQ_PHASE_COMPLETE;
+ set->set_remaining--;
+ /* If it was disconnected, don't sweat it. */
+ if (list_empty(&req->rq_import->imp_pinger_chain)) {
+ ptlrpc_unregister_reply(req);
+ continue;
+ }
+
+ ptlrpc_expire_one_request(req);
+ }
+ up(&pinger_sem);
+ ptlrpc_set_destroy(set);
+
+ /* Wait until the next ping time, or until we're stopped. */
+ time_to_next_ping = this_ping + (obd_timeout * HZ) - jiffies;
+ CDEBUG(D_HA, "next ping in %lu (%lu)\n", time_to_next_ping,
+ this_ping + (obd_timeout * HZ));
+ if (time_to_next_ping > 0) {
+ lwi = LWI_TIMEOUT(time_to_next_ping, NULL, NULL);
+ l_wait_event(thread->t_ctl_waitq,
+ thread->t_flags & (SVC_STOPPING|SVC_EVENT),
+ &lwi);
+ if (thread->t_flags & SVC_STOPPING) {
+ thread->t_flags &= ~SVC_STOPPING;
+ EXIT;
+ break;
+ } else if (thread->t_flags & SVC_EVENT) {
+ /* woken after adding import to reset timer */
+ thread->t_flags &= ~SVC_EVENT;
+ }
+ }
}
thread->t_flags = SVC_STOPPED;
wake_up(&thread->t_ctl_waitq);
- CDEBUG(D_NET, "pinger thread exiting, process %d: rc = %d\n",
- current->pid, rc);
- return rc;
+ CDEBUG(D_NET, "pinger thread exiting, process %d\n", current->pid);
+ return 0;
}
-int ptlrpc_pinger_start(void)
+int ptlrpc_start_pinger(void)
{
struct l_wait_info lwi = { 0 };
struct ptlrpc_svc_data d;
int rc;
+#ifndef ENABLE_PINGER
+ return 0;
+#endif
ENTRY;
- spin_lock(&pinger_lock);
if (pinger_thread != NULL)
- GOTO(out, rc = -EALREADY);
+ RETURN(-EALREADY);
OBD_ALLOC(pinger_thread, sizeof(*pinger_thread));
if (pinger_thread == NULL)
- GOTO(out, rc = -ENOMEM);
+ RETURN(-ENOMEM);
init_waitqueue_head(&pinger_thread->t_ctl_waitq);
- d.name = "Lustre pinger";
+ d.name = "ll_ping";
d.thread = pinger_thread;
/* CLONE_VM and CLONE_FILES just avoid a needless copy, because we
if (rc < 0) {
CERROR("cannot start thread: %d\n", rc);
OBD_FREE(pinger_thread, sizeof(*pinger_thread));
- GOTO(out, rc);
+ RETURN(rc);
}
l_wait_event(pinger_thread->t_ctl_waitq,
pinger_thread->t_flags & SVC_RUNNING, &lwi);
- out:
- spin_unlock(&pinger_lock);
RETURN(rc);
}
{
struct l_wait_info lwi = { 0 };
int rc = 0;
+#ifndef ENABLE_PINGER
+ return 0;
+#endif
ENTRY;
- spin_lock(&pinger_lock);
if (pinger_thread == NULL)
- GOTO(out, rc = -EALREADY);
-
+ RETURN(-EALREADY);
+ down(&pinger_sem);
pinger_thread->t_flags = SVC_STOPPING;
wake_up(&pinger_thread->t_ctl_waitq);
+ up(&pinger_sem);
+
l_wait_event(pinger_thread->t_ctl_waitq,
(pinger_thread->t_flags & SVC_STOPPED), &lwi);
OBD_FREE(pinger_thread, sizeof(*pinger_thread));
-
- out:
- spin_unlock(&pinger_lock);
+ pinger_thread = NULL;
RETURN(rc);
}
+
+void ptlrpc_pinger_sending_on_import(struct obd_import *imp)
+{
+ down(&pinger_sem);
+ imp->imp_next_ping = jiffies + (obd_timeout * HZ);
+ up(&pinger_sem);
+}
+
+int ptlrpc_pinger_add_import(struct obd_import *imp)
+{
+ ENTRY;
+ if (!list_empty(&imp->imp_pinger_chain))
+ RETURN(-EALREADY);
+
+ down(&pinger_sem);
+ CDEBUG(D_HA, "adding pingable import %s->%s\n",
+ imp->imp_obd->obd_uuid.uuid, imp->imp_target_uuid.uuid);
+ imp->imp_next_ping = jiffies + (obd_timeout * HZ);
+ /* XXX sort, blah blah */
+ list_add_tail(&imp->imp_pinger_chain, &pinger_imports);
+ class_import_get(imp);
+
+#ifdef ENABLE_PINGER
+ pinger_thread->t_flags |= SVC_EVENT;
+ wake_up(&pinger_thread->t_ctl_waitq);
+#endif
+ up(&pinger_sem);
+
+ RETURN(0);
+}
+
+int ptlrpc_pinger_del_import(struct obd_import *imp)
+{
+ ENTRY;
+ if (list_empty(&imp->imp_pinger_chain))
+ RETURN(-ENOENT);
+
+ down(&pinger_sem);
+ list_del_init(&imp->imp_pinger_chain);
+ CDEBUG(D_HA, "removing pingable import %s->%s\n",
+ imp->imp_obd->obd_uuid.uuid, imp->imp_target_uuid.uuid);
+ class_import_put(imp);
+ up(&pinger_sem);
+ RETURN(0);
+}
+
+#else /* !__KERNEL__ */
+
+int ptlrpc_start_pinger(void)
+{
+ return 0;
+}
+
+int ptlrpc_stop_pinger(void)
+{
+ return 0;
+}
+
+int ptlrpc_pinger_add_import(struct obd_import *imp)
+{
+ return 0;
+}
+
+int ptlrpc_pinger_del_import(struct obd_import *imp)
+{
+ return 0;
+}
+
+void ptlrpc_pinger_sending_on_import(struct obd_import *imp)
+{
+}
+
+#endif
git://git.whamcloud.com / fs / lustre-release.git / blobdiff