mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 1 normalized pattern(s): this copyrighted material is made available to anyone wishing to use modify copy or redistribute it subject to the terms and conditions of the gnu general public license v 2 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 45 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528170027.342746075@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
169 lines
4.7 KiB
C
169 lines
4.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/******************************************************************************
|
|
*******************************************************************************
|
|
**
|
|
** Copyright (C) 2005-2007 Red Hat, Inc. All rights reserved.
|
|
**
|
|
**
|
|
*******************************************************************************
|
|
******************************************************************************/
|
|
|
|
#include "dlm_internal.h"
|
|
#include "member.h"
|
|
#include "lock.h"
|
|
#include "dir.h"
|
|
#include "config.h"
|
|
#include "requestqueue.h"
|
|
|
|
struct rq_entry {
|
|
struct list_head list;
|
|
uint32_t recover_seq;
|
|
int nodeid;
|
|
struct dlm_message request;
|
|
};
|
|
|
|
/*
|
|
* Requests received while the lockspace is in recovery get added to the
|
|
* request queue and processed when recovery is complete. This happens when
|
|
* the lockspace is suspended on some nodes before it is on others, or the
|
|
* lockspace is enabled on some while still suspended on others.
|
|
*/
|
|
|
|
void dlm_add_requestqueue(struct dlm_ls *ls, int nodeid, struct dlm_message *ms)
|
|
{
|
|
struct rq_entry *e;
|
|
int length = ms->m_header.h_length - sizeof(struct dlm_message);
|
|
|
|
e = kmalloc(sizeof(struct rq_entry) + length, GFP_NOFS);
|
|
if (!e) {
|
|
log_print("dlm_add_requestqueue: out of memory len %d", length);
|
|
return;
|
|
}
|
|
|
|
e->recover_seq = ls->ls_recover_seq & 0xFFFFFFFF;
|
|
e->nodeid = nodeid;
|
|
memcpy(&e->request, ms, ms->m_header.h_length);
|
|
|
|
mutex_lock(&ls->ls_requestqueue_mutex);
|
|
list_add_tail(&e->list, &ls->ls_requestqueue);
|
|
mutex_unlock(&ls->ls_requestqueue_mutex);
|
|
}
|
|
|
|
/*
|
|
* Called by dlm_recoverd to process normal messages saved while recovery was
|
|
* happening. Normal locking has been enabled before this is called. dlm_recv
|
|
* upon receiving a message, will wait for all saved messages to be drained
|
|
* here before processing the message it got. If a new dlm_ls_stop() arrives
|
|
* while we're processing these saved messages, it may block trying to suspend
|
|
* dlm_recv if dlm_recv is waiting for us in dlm_wait_requestqueue. In that
|
|
* case, we don't abort since locking_stopped is still 0. If dlm_recv is not
|
|
* waiting for us, then this processing may be aborted due to locking_stopped.
|
|
*/
|
|
|
|
int dlm_process_requestqueue(struct dlm_ls *ls)
|
|
{
|
|
struct rq_entry *e;
|
|
struct dlm_message *ms;
|
|
int error = 0;
|
|
|
|
mutex_lock(&ls->ls_requestqueue_mutex);
|
|
|
|
for (;;) {
|
|
if (list_empty(&ls->ls_requestqueue)) {
|
|
mutex_unlock(&ls->ls_requestqueue_mutex);
|
|
error = 0;
|
|
break;
|
|
}
|
|
e = list_entry(ls->ls_requestqueue.next, struct rq_entry, list);
|
|
mutex_unlock(&ls->ls_requestqueue_mutex);
|
|
|
|
ms = &e->request;
|
|
|
|
log_limit(ls, "dlm_process_requestqueue msg %d from %d "
|
|
"lkid %x remid %x result %d seq %u",
|
|
ms->m_type, ms->m_header.h_nodeid,
|
|
ms->m_lkid, ms->m_remid, ms->m_result,
|
|
e->recover_seq);
|
|
|
|
dlm_receive_message_saved(ls, &e->request, e->recover_seq);
|
|
|
|
mutex_lock(&ls->ls_requestqueue_mutex);
|
|
list_del(&e->list);
|
|
kfree(e);
|
|
|
|
if (dlm_locking_stopped(ls)) {
|
|
log_debug(ls, "process_requestqueue abort running");
|
|
mutex_unlock(&ls->ls_requestqueue_mutex);
|
|
error = -EINTR;
|
|
break;
|
|
}
|
|
schedule();
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* After recovery is done, locking is resumed and dlm_recoverd takes all the
|
|
* saved requests and processes them as they would have been by dlm_recv. At
|
|
* the same time, dlm_recv will start receiving new requests from remote nodes.
|
|
* We want to delay dlm_recv processing new requests until dlm_recoverd has
|
|
* finished processing the old saved requests. We don't check for locking
|
|
* stopped here because dlm_ls_stop won't stop locking until it's suspended us
|
|
* (dlm_recv).
|
|
*/
|
|
|
|
void dlm_wait_requestqueue(struct dlm_ls *ls)
|
|
{
|
|
for (;;) {
|
|
mutex_lock(&ls->ls_requestqueue_mutex);
|
|
if (list_empty(&ls->ls_requestqueue))
|
|
break;
|
|
mutex_unlock(&ls->ls_requestqueue_mutex);
|
|
schedule();
|
|
}
|
|
mutex_unlock(&ls->ls_requestqueue_mutex);
|
|
}
|
|
|
|
static int purge_request(struct dlm_ls *ls, struct dlm_message *ms, int nodeid)
|
|
{
|
|
uint32_t type = ms->m_type;
|
|
|
|
/* the ls is being cleaned up and freed by release_lockspace */
|
|
if (!ls->ls_count)
|
|
return 1;
|
|
|
|
if (dlm_is_removed(ls, nodeid))
|
|
return 1;
|
|
|
|
/* directory operations are always purged because the directory is
|
|
always rebuilt during recovery and the lookups resent */
|
|
|
|
if (type == DLM_MSG_REMOVE ||
|
|
type == DLM_MSG_LOOKUP ||
|
|
type == DLM_MSG_LOOKUP_REPLY)
|
|
return 1;
|
|
|
|
if (!dlm_no_directory(ls))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
void dlm_purge_requestqueue(struct dlm_ls *ls)
|
|
{
|
|
struct dlm_message *ms;
|
|
struct rq_entry *e, *safe;
|
|
|
|
mutex_lock(&ls->ls_requestqueue_mutex);
|
|
list_for_each_entry_safe(e, safe, &ls->ls_requestqueue, list) {
|
|
ms = &e->request;
|
|
|
|
if (purge_request(ls, ms, e->nodeid)) {
|
|
list_del(&e->list);
|
|
kfree(e);
|
|
}
|
|
}
|
|
mutex_unlock(&ls->ls_requestqueue_mutex);
|
|
}
|
|
|