*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2012, Intel Corporation.
+ * Copyright (c) 2012, 2016, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
*
* lustre/ptlrpc/sec_gc.c
*
#define DEBUG_SUBSYSTEM S_SEC
+#include <linux/workqueue.h>
#include <libcfs/libcfs.h>
#include <obd_support.h>
#include <lustre_net.h>
#include <lustre_sec.h>
-#define SEC_GC_INTERVAL (30 * 60)
-
+#include "ptlrpc_internal.h"
-static struct mutex sec_gc_mutex;
-static spinlock_t sec_gc_list_lock;
-static struct list_head sec_gc_list;
+#define SEC_GC_INTERVAL (30 * 60)
-static spinlock_t sec_gc_ctx_list_lock;
-static struct list_head sec_gc_ctx_list;
+static DEFINE_MUTEX(sec_gc_mutex);
+static DEFINE_SPINLOCK(sec_gc_list_lock);
+static DEFINE_SPINLOCK(sec_gc_ctx_list_lock);
+static LIST_HEAD(sec_gc_list);
+static LIST_HEAD(sec_gc_ctx_list);
-static struct ptlrpc_thread sec_gc_thread;
static atomic_t sec_gc_wait_del = ATOMIC_INIT(0);
-
void sptlrpc_gc_add_sec(struct ptlrpc_sec *sec)
{
- LASSERT(sec->ps_policy->sp_cops->gc_ctx);
- LASSERT(sec->ps_gc_interval > 0);
+ LASSERT(sec->ps_policy->sp_cops->gc_ctx);
+ LASSERT(sec->ps_gc_interval > 0);
LASSERT(list_empty(&sec->ps_gc_list));
- sec->ps_gc_next = cfs_time_current_sec() + sec->ps_gc_interval;
+ sec->ps_gc_next = ktime_get_real_seconds() + sec->ps_gc_interval;
spin_lock(&sec_gc_list_lock);
- list_add_tail(&sec_gc_list, &sec->ps_gc_list);
+ list_add_tail(&sec->ps_gc_list, &sec_gc_list);
spin_unlock(&sec_gc_list_lock);
CDEBUG(D_SEC, "added sec %p(%s)\n", sec, sec->ps_policy->sp_name);
}
-EXPORT_SYMBOL(sptlrpc_gc_add_sec);
void sptlrpc_gc_del_sec(struct ptlrpc_sec *sec)
{
if (list_empty(&sec->ps_gc_list))
return;
- might_sleep();
-
/* signal before list_del to make iteration in gc thread safe */
atomic_inc(&sec_gc_wait_del);
CDEBUG(D_SEC, "del sec %p(%s)\n", sec, sec->ps_policy->sp_name);
}
-EXPORT_SYMBOL(sptlrpc_gc_del_sec);
+
+static void sec_gc_main(struct work_struct *ws);
+static DECLARE_DELAYED_WORK(sec_gc_work, sec_gc_main);
void sptlrpc_gc_add_ctx(struct ptlrpc_cli_ctx *ctx)
{
list_add(&ctx->cc_gc_chain, &sec_gc_ctx_list);
spin_unlock(&sec_gc_ctx_list_lock);
- thread_add_flags(&sec_gc_thread, SVC_SIGNAL);
- wake_up(&sec_gc_thread.t_ctl_waitq);
+ mod_delayed_work(system_wq, &sec_gc_work, 0);
}
EXPORT_SYMBOL(sptlrpc_gc_add_ctx);
static void sec_do_gc(struct ptlrpc_sec *sec)
{
- LASSERT(sec->ps_policy->sp_cops->gc_ctx);
+ LASSERT(sec->ps_policy->sp_cops->gc_ctx);
- if (unlikely(sec->ps_gc_next == 0)) {
- CDEBUG(D_SEC, "sec %p(%s) has 0 gc time\n",
- sec, sec->ps_policy->sp_name);
- return;
- }
+ if (unlikely(sec->ps_gc_next == 0)) {
+ CDEBUG(D_SEC, "sec %p(%s) has 0 gc time\n",
+ sec, sec->ps_policy->sp_name);
+ return;
+ }
- CDEBUG(D_SEC, "check on sec %p(%s)\n", sec, sec->ps_policy->sp_name);
+ CDEBUG(D_SEC, "check on sec %p(%s)\n", sec, sec->ps_policy->sp_name);
- if (cfs_time_after(sec->ps_gc_next, cfs_time_current_sec()))
- return;
+ if (sec->ps_gc_next > ktime_get_real_seconds())
+ return;
- sec->ps_policy->sp_cops->gc_ctx(sec);
- sec->ps_gc_next = cfs_time_current_sec() + sec->ps_gc_interval;
+ sec->ps_policy->sp_cops->gc_ctx(sec);
+ sec->ps_gc_next = ktime_get_real_seconds() + sec->ps_gc_interval;
}
-static int sec_gc_main(void *arg)
+static void sec_gc_main(struct work_struct *ws)
{
- struct ptlrpc_thread *thread = (struct ptlrpc_thread *) arg;
- struct l_wait_info lwi;
-
- unshare_fs_struct();
+ struct ptlrpc_sec *sec;
- /* Record that the thread is running */
- thread_set_flags(thread, SVC_RUNNING);
- wake_up(&thread->t_ctl_waitq);
-
- while (1) {
- struct ptlrpc_sec *sec;
-
- thread_clear_flags(thread, SVC_SIGNAL);
- sec_process_ctx_list();
+ sec_process_ctx_list();
again:
- /* go through sec list do gc.
- * FIXME here we iterate through the whole list each time which
- * is not optimal. we perhaps want to use balanced binary tree
- * to trace each sec as order of expiry time.
- * another issue here is we wakeup as fixed interval instead of
- * according to each sec's expiry time */
- mutex_lock(&sec_gc_mutex);
- list_for_each_entry(sec, &sec_gc_list, ps_gc_list) {
- /* if someone is waiting to be deleted, let it
- * proceed as soon as possible. */
- if (atomic_read(&sec_gc_wait_del)) {
- CDEBUG(D_SEC, "deletion pending, start over\n");
- mutex_unlock(&sec_gc_mutex);
- goto again;
- }
-
- sec_do_gc(sec);
+ /*
+ * go through sec list do gc.
+ * FIXME here we iterate through the whole list each time which
+ * is not optimal. we perhaps want to use balanced binary tree
+ * to trace each sec as order of expiry time.
+ * another issue here is we wakeup as fixed interval instead of
+ * according to each sec's expiry time
+ */
+ mutex_lock(&sec_gc_mutex);
+ list_for_each_entry(sec, &sec_gc_list, ps_gc_list) {
+ /*
+ * if someone is waiting to be deleted, let it
+ * proceed as soon as possible.
+ */
+ if (atomic_read(&sec_gc_wait_del)) {
+ CDEBUG(D_SEC, "deletion pending, start over\n");
+ mutex_unlock(&sec_gc_mutex);
+ goto again;
}
- mutex_unlock(&sec_gc_mutex);
- /* check ctx list again before sleep */
- sec_process_ctx_list();
-
- lwi = LWI_TIMEOUT(msecs_to_jiffies(SEC_GC_INTERVAL *
- MSEC_PER_SEC),
- NULL, NULL);
- l_wait_event(thread->t_ctl_waitq,
- thread_is_stopping(thread) ||
- thread_is_signal(thread),
- &lwi);
-
- if (thread_test_and_clear_flags(thread, SVC_STOPPING))
- break;
+ sec_do_gc(sec);
}
+ mutex_unlock(&sec_gc_mutex);
- thread_set_flags(thread, SVC_STOPPED);
- wake_up(&thread->t_ctl_waitq);
- return 0;
+ /* check ctx list again before sleep */
+ sec_process_ctx_list();
+ schedule_delayed_work(&sec_gc_work, cfs_time_seconds(SEC_GC_INTERVAL));
}
int sptlrpc_gc_init(void)
{
- struct l_wait_info lwi = { 0 };
- struct task_struct *task;
-
- mutex_init(&sec_gc_mutex);
- spin_lock_init(&sec_gc_list_lock);
- spin_lock_init(&sec_gc_ctx_list_lock);
-
- INIT_LIST_HEAD(&sec_gc_list);
- INIT_LIST_HEAD(&sec_gc_ctx_list);
-
- /* initialize thread control */
- memset(&sec_gc_thread, 0, sizeof(sec_gc_thread));
- init_waitqueue_head(&sec_gc_thread.t_ctl_waitq);
-
- task = kthread_run(sec_gc_main, &sec_gc_thread, "sptlrpc_gc");
- if (IS_ERR(task)) {
- CERROR("can't start gc thread: %ld\n", PTR_ERR(task));
- return PTR_ERR(task);
- }
-
- l_wait_event(sec_gc_thread.t_ctl_waitq,
- thread_is_running(&sec_gc_thread), &lwi);
+ schedule_delayed_work(&sec_gc_work, cfs_time_seconds(SEC_GC_INTERVAL));
return 0;
}
void sptlrpc_gc_fini(void)
{
- struct l_wait_info lwi = { 0 };
-
- thread_set_flags(&sec_gc_thread, SVC_STOPPING);
- wake_up(&sec_gc_thread.t_ctl_waitq);
-
- l_wait_event(sec_gc_thread.t_ctl_waitq,
- thread_is_stopped(&sec_gc_thread), &lwi);
+ cancel_delayed_work_sync(&sec_gc_work);
}
-
git://git.whamcloud.com / fs / lustre-release.git / blobdiff