4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 021110-1307, USA
24 * Copyright (c) 2012, 2014, Intel Corporation.
25 * Use is subject to license terms.
27 * Author: Johann Lombardi <johann.lombardi@intel.com>
28 * Author: Niu Yawei <yawei.niu@intel.com>
31 #define DEBUG_SUBSYSTEM S_LQUOTA
33 #include <linux/kthread.h>
34 #include "qsd_internal.h"
36 extern struct kmem_cache *upd_kmem;
39 * Allocate and fill an qsd_upd_rec structure to be processed by the writeback
42 * \param qqi - is the qsd_qtype_info structure relevant to the update
43 * \param lqe - is the lquota entry subject to the update
44 * \param qid - is the identifier subject to the update
45 * \param rec - is the record storing the new quota settings
46 * \param ver - is the version associated with the update
47 * \param global - is a boolean set to true if this is an update of the global
48 * index and false for a slave index.
50 static struct qsd_upd_rec *qsd_upd_alloc(struct qsd_qtype_info *qqi,
51 struct lquota_entry *lqe,
53 union lquota_rec *rec, __u64 ver,
56 struct qsd_upd_rec *upd;
58 OBD_SLAB_ALLOC_PTR_GFP(upd, upd_kmem, GFP_NOFS);
64 INIT_LIST_HEAD(&upd->qur_link);
72 upd->qur_global = global;
77 static void qsd_upd_free(struct qsd_upd_rec *upd)
80 lqe_putref(upd->qur_lqe);
81 OBD_SLAB_FREE_PTR(upd, upd_kmem);
84 /* must hold the qsd_lock */
85 static void qsd_upd_add(struct qsd_instance *qsd, struct qsd_upd_rec *upd)
87 if (!qsd->qsd_stopping) {
88 list_add_tail(&upd->qur_link, &qsd->qsd_upd_list);
89 /* wake up the upd thread */
90 wake_up(&qsd->qsd_upd_thread.t_ctl_waitq);
92 CWARN("%s: discard update.\n", qsd->qsd_svname);
94 LQUOTA_WARN(upd->qur_lqe, "discard update.");
99 /* must hold the qsd_lock */
100 static void qsd_add_deferred(struct qsd_instance *qsd, struct list_head *list,
101 struct qsd_upd_rec *upd)
103 struct qsd_upd_rec *tmp, *n;
105 if (qsd->qsd_stopping) {
106 CWARN("%s: discard deferred udpate.\n", qsd->qsd_svname);
108 LQUOTA_WARN(upd->qur_lqe, "discard deferred update.");
113 /* Sort the updates in ascending order */
114 list_for_each_entry_safe_reverse(tmp, n, list, qur_link) {
116 /* There could be some legacy records which have duplicated
117 * version. Imagine following scenario: slave received global
118 * glimpse and queued a record in the deferred list, then
119 * master crash and rollback to an ealier version, then the
120 * version of queued record will be conflicting with later
121 * updates. We should just delete the legacy record in such
123 if (upd->qur_ver == tmp->qur_ver) {
124 LASSERT(tmp->qur_lqe);
125 LQUOTA_ERROR(tmp->qur_lqe, "Found a conflict record "
126 "with ver:"LPU64"", tmp->qur_ver);
127 list_del_init(&tmp->qur_link);
129 } else if (upd->qur_ver < tmp->qur_ver) {
132 list_add_tail(&upd->qur_link, &tmp->qur_link);
136 list_add(&upd->qur_link, list);
139 /* must hold the qsd_lock */
140 static void qsd_kickoff_deferred(struct qsd_qtype_info *qqi,
141 struct list_head *list, __u64 ver)
143 struct qsd_upd_rec *upd, *tmp;
146 /* Get the first update record in the list, which has the smallest
147 * version, discard all records with versions smaller than the current
149 list_for_each_entry_safe(upd, tmp, list, qur_link) {
150 if (upd->qur_ver <= ver) {
151 /* drop this update */
152 list_del_init(&upd->qur_link);
153 CDEBUG(D_QUOTA, "%s: skipping deferred update ver:"
154 LPU64"/"LPU64", global:%d, qid:"LPU64"\n",
155 qqi->qqi_qsd->qsd_svname, upd->qur_ver, ver,
156 upd->qur_global, upd->qur_qid.qid_uid);
163 /* No remaining deferred update */
164 if (list_empty(list))
167 CDEBUG(D_QUOTA, "%s: found deferred update record. "
168 "version:"LPU64"/"LPU64", global:%d, qid:"LPU64"\n",
169 qqi->qqi_qsd->qsd_svname, upd->qur_ver, ver,
170 upd->qur_global, upd->qur_qid.qid_uid);
172 LASSERTF(upd->qur_ver > ver, "lur_ver:"LPU64", cur_ver:"LPU64"\n",
175 /* Kick off the deferred udpate */
176 if (upd->qur_ver == ver + 1) {
177 list_del_init(&upd->qur_link);
178 qsd_upd_add(qqi->qqi_qsd, upd);
183 /* Bump version of global or slave index copy
185 * \param qqi - qsd_qtype_info
186 * \param ver - version to be bumped to
187 * \param global - global or slave index copy?
189 void qsd_bump_version(struct qsd_qtype_info *qqi, __u64 ver, bool global)
191 struct list_head *list;
194 idx_ver = global ? &qqi->qqi_glb_ver : &qqi->qqi_slv_ver;
195 list = global ? &qqi->qqi_deferred_glb : &qqi->qqi_deferred_slv;
197 write_lock(&qqi->qqi_qsd->qsd_lock);
200 qqi->qqi_glb_uptodate = 1;
202 qqi->qqi_slv_uptodate = 1;
203 qsd_kickoff_deferred(qqi, list, ver);
204 write_unlock(&qqi->qqi_qsd->qsd_lock);
208 * Schedule a commit of a lquota entry
210 * \param qqi - qsd_qtype_info
211 * \param lqe - lquota_entry
212 * \param qid - quota id
213 * \param rec - global or slave record to be updated to disk
214 * \param ver - new index file version
215 * \param global- true: master record; false: slave record
217 void qsd_upd_schedule(struct qsd_qtype_info *qqi, struct lquota_entry *lqe,
218 union lquota_id *qid, union lquota_rec *rec, __u64 ver,
221 struct qsd_upd_rec *upd;
222 struct qsd_instance *qsd = qqi->qqi_qsd;
226 CDEBUG(D_QUOTA, "%s: schedule update. global:%s, version:"LPU64"\n",
227 qsd->qsd_svname, global ? "true" : "false", ver);
229 upd = qsd_upd_alloc(qqi, lqe, qid, rec, ver, global);
233 /* If we don't want update index version, no need to sort the
234 * records in version order, just schedule the updates instantly. */
236 write_lock(&qsd->qsd_lock);
237 qsd_upd_add(qsd, upd);
238 write_unlock(&qsd->qsd_lock);
242 write_lock(&qsd->qsd_lock);
244 cur_ver = global ? qqi->qqi_glb_ver : qqi->qqi_slv_ver;
246 if (ver <= cur_ver) {
248 /* legitimate race between glimpse AST and
250 CDEBUG(D_QUOTA, "%s: discarding glb update from glimpse"
251 " ver:"LPU64" local ver:"LPU64"\n",
252 qsd->qsd_svname, ver, cur_ver);
254 CERROR("%s: discard slv update, ver:"LPU64" local ver:"
255 LPU64"\n", qsd->qsd_svname, ver, cur_ver);
257 } else if ((ver == cur_ver + 1) && qqi->qqi_glb_uptodate &&
258 qqi->qqi_slv_uptodate) {
259 /* In order update, and reintegration has been done. */
260 qsd_upd_add(qsd, upd);
262 /* Out of order update (the one with smaller version hasn't
263 * reached slave or hasn't been flushed to disk yet), or
264 * the reintegration is in progress. Defer the update. */
265 struct list_head *list = global ? &qqi->qqi_deferred_glb :
266 &qqi->qqi_deferred_slv;
267 qsd_add_deferred(qsd, list, upd);
270 write_unlock(&qsd->qsd_lock);
275 static int qsd_process_upd(const struct lu_env *env, struct qsd_upd_rec *upd)
277 struct lquota_entry *lqe = upd->qur_lqe;
278 struct qsd_qtype_info *qqi = upd->qur_qqi;
283 lqe = lqe_locate(env, qqi->qqi_site, &upd->qur_qid);
285 GOTO(out, rc = PTR_ERR(lqe));
288 /* The in-memory lqe update for slave index copy isn't deferred,
289 * we shouldn't touch it here. */
290 if (upd->qur_global) {
291 rc = qsd_update_lqe(env, lqe, upd->qur_global, &upd->qur_rec);
295 qsd_refresh_usage(env, lqe);
296 /* Report usage asynchronously */
297 rc = qsd_adjust(env, lqe);
299 LQUOTA_ERROR(lqe, "failed to report usage, rc:%d", rc);
302 rc = qsd_update_index(env, qqi, &upd->qur_qid, upd->qur_global,
303 upd->qur_ver, &upd->qur_rec);
305 if (lqe && !IS_ERR(lqe)) {
312 void qsd_adjust_schedule(struct lquota_entry *lqe, bool defer, bool cancel)
314 struct qsd_instance *qsd = lqe2qqi(lqe)->qqi_qsd;
317 read_lock(&qsd->qsd_lock);
318 if (qsd->qsd_stopping) {
319 read_unlock(&qsd->qsd_lock);
322 read_unlock(&qsd->qsd_lock);
325 spin_lock(&qsd->qsd_adjust_lock);
327 /* the lqe is being queued for the per-ID lock cancel, we should
328 * cancel the lock cancel and re-add it for quota adjust */
329 if (!list_empty(&lqe->lqe_link) &&
330 lqe->lqe_adjust_time == 0) {
331 list_del_init(&lqe->lqe_link);
335 if (list_empty(&lqe->lqe_link)) {
337 lqe->lqe_adjust_time = 0;
339 lqe->lqe_adjust_time = defer ?
340 cfs_time_shift_64(QSD_WB_INTERVAL) :
341 cfs_time_current_64();
342 /* lqe reference transferred to list */
344 list_add_tail(&lqe->lqe_link,
345 &qsd->qsd_adjust_list);
347 list_add(&lqe->lqe_link, &qsd->qsd_adjust_list);
350 spin_unlock(&qsd->qsd_adjust_lock);
353 wake_up(&qsd->qsd_upd_thread.t_ctl_waitq);
358 /* return true if there is pending writeback records or the pending
360 static bool qsd_job_pending(struct qsd_instance *qsd, struct list_head *upd,
363 bool job_pending = false;
366 LASSERT(list_empty(upd));
369 spin_lock(&qsd->qsd_adjust_lock);
370 if (!list_empty(&qsd->qsd_adjust_list)) {
371 struct lquota_entry *lqe;
372 lqe = list_entry(qsd->qsd_adjust_list.next,
373 struct lquota_entry, lqe_link);
374 if (cfs_time_beforeq_64(lqe->lqe_adjust_time,
375 cfs_time_current_64()))
378 spin_unlock(&qsd->qsd_adjust_lock);
380 write_lock(&qsd->qsd_lock);
381 if (!list_empty(&qsd->qsd_upd_list)) {
382 list_splice_init(&qsd->qsd_upd_list, upd);
386 if (qsd->qsd_acct_failed) {
387 /* don't bother kicking off reintegration if space accounting
388 * failed to be enabled */
389 write_unlock(&qsd->qsd_lock);
393 for (qtype = USRQUOTA; qtype < LL_MAXQUOTAS; qtype++) {
394 struct qsd_qtype_info *qqi = qsd->qsd_type_array[qtype];
396 if (!qsd_type_enabled(qsd, qtype))
399 if ((!qqi->qqi_glb_uptodate || !qqi->qqi_slv_uptodate) &&
401 /* global or slave index not up to date and reint
402 * thread not running */
406 write_unlock(&qsd->qsd_lock);
410 static int qsd_upd_thread(void *arg)
412 struct qsd_instance *qsd = (struct qsd_instance *)arg;
413 struct ptlrpc_thread *thread = &qsd->qsd_upd_thread;
414 struct l_wait_info lwi;
415 struct list_head queue;
416 struct qsd_upd_rec *upd, *n;
420 struct lquota_entry *lqe;
428 rc = lu_env_init(env, LCT_DT_THREAD);
430 CERROR("%s: cannot init env: rc = %d\n", qsd->qsd_svname, rc);
435 thread_set_flags(thread, SVC_RUNNING);
436 wake_up(&thread->t_ctl_waitq);
438 INIT_LIST_HEAD(&queue);
439 lwi = LWI_TIMEOUT(cfs_time_seconds(QSD_WB_INTERVAL), NULL, NULL);
441 l_wait_event(thread->t_ctl_waitq,
442 qsd_job_pending(qsd, &queue, &uptodate) ||
443 !thread_is_running(thread), &lwi);
445 list_for_each_entry_safe(upd, n, &queue, qur_link) {
446 list_del_init(&upd->qur_link);
447 qsd_process_upd(env, upd);
451 spin_lock(&qsd->qsd_adjust_lock);
452 cur_time = cfs_time_current_64();
453 while (!list_empty(&qsd->qsd_adjust_list)) {
454 lqe = list_entry(qsd->qsd_adjust_list.next,
455 struct lquota_entry, lqe_link);
456 /* deferred items are sorted by time */
457 if (!cfs_time_beforeq_64(lqe->lqe_adjust_time,
461 list_del_init(&lqe->lqe_link);
462 spin_unlock(&qsd->qsd_adjust_lock);
464 if (thread_is_running(thread) && uptodate) {
465 qsd_refresh_usage(env, lqe);
466 if (lqe->lqe_adjust_time == 0)
467 qsd_id_lock_cancel(env, lqe);
469 qsd_adjust(env, lqe);
473 spin_lock(&qsd->qsd_adjust_lock);
475 spin_unlock(&qsd->qsd_adjust_lock);
477 if (!thread_is_running(thread))
483 for (qtype = USRQUOTA; qtype < LL_MAXQUOTAS; qtype++)
484 qsd_start_reint_thread(qsd->qsd_type_array[qtype]);
488 thread_set_flags(thread, SVC_STOPPED);
489 wake_up(&thread->t_ctl_waitq);
493 int qsd_start_upd_thread(struct qsd_instance *qsd)
495 struct ptlrpc_thread *thread = &qsd->qsd_upd_thread;
496 struct l_wait_info lwi = { 0 };
497 struct task_struct *task;
500 task = kthread_run(qsd_upd_thread, (void *)qsd,
501 "lquota_wb_%s", qsd->qsd_svname);
503 CERROR("fail to start quota update thread: rc = %ld\n",
505 thread_set_flags(thread, SVC_STOPPED);
506 RETURN(PTR_ERR(task));
509 l_wait_event(thread->t_ctl_waitq,
510 thread_is_running(thread) || thread_is_stopped(thread),
515 static void qsd_cleanup_deferred(struct qsd_instance *qsd)
519 for (qtype = USRQUOTA; qtype < LL_MAXQUOTAS; qtype++) {
520 struct qsd_upd_rec *upd, *tmp;
521 struct qsd_qtype_info *qqi = qsd->qsd_type_array[qtype];
526 write_lock(&qsd->qsd_lock);
527 list_for_each_entry_safe(upd, tmp, &qqi->qqi_deferred_glb,
529 CWARN("%s: Free global deferred upd: ID:"LPU64", "
530 "ver:"LPU64"/"LPU64"\n", qsd->qsd_svname,
531 upd->qur_qid.qid_uid, upd->qur_ver,
533 list_del_init(&upd->qur_link);
536 list_for_each_entry_safe(upd, tmp, &qqi->qqi_deferred_slv,
538 CWARN("%s: Free slave deferred upd: ID:"LPU64", "
539 "ver:"LPU64"/"LPU64"\n", qsd->qsd_svname,
540 upd->qur_qid.qid_uid, upd->qur_ver,
542 list_del_init(&upd->qur_link);
545 write_unlock(&qsd->qsd_lock);
549 static void qsd_cleanup_adjust(struct qsd_instance *qsd)
551 struct lquota_entry *lqe;
553 spin_lock(&qsd->qsd_adjust_lock);
554 while (!list_empty(&qsd->qsd_adjust_list)) {
555 lqe = list_entry(qsd->qsd_adjust_list.next,
556 struct lquota_entry, lqe_link);
557 list_del_init(&lqe->lqe_link);
560 spin_unlock(&qsd->qsd_adjust_lock);
563 void qsd_stop_upd_thread(struct qsd_instance *qsd)
565 struct ptlrpc_thread *thread = &qsd->qsd_upd_thread;
566 struct l_wait_info lwi = { 0 };
568 if (!thread_is_stopped(thread)) {
569 thread_set_flags(thread, SVC_STOPPING);
570 wake_up(&thread->t_ctl_waitq);
572 l_wait_event(thread->t_ctl_waitq, thread_is_stopped(thread),
575 qsd_cleanup_deferred(qsd);
576 qsd_cleanup_adjust(qsd);