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>
32 * Quota Slave Driver (QSD) management.
34 * The quota slave feature is implemented under the form of a library called
35 * QSD. Each OSD device should create a QSD instance via qsd_init() which will
36 * be used to manage quota enforcement for this device. This implies:
37 * - completing the reintegration procedure with the quota master (aka QMT, see
38 * qmt_dev.c) to retrieve the latest quota settings and space distribution.
39 * - managing quota locks in order to be notified of configuration changes.
40 * - acquiring space from the QMT when quota space for a given user/group is
41 * close to exhaustion.
42 * - allocating quota space to service threads for local request processing.
44 * Once the QSD instance created, the OSD device should invoke qsd_start()
45 * when recovery is completed. This notifies the QSD that we are about to
46 * process new requests on which quota should be strictly enforced.
47 * Then, qsd_op_begin/end can be used to reserve/release/pre-acquire quota space
48 * for/after each operation until shutdown where the QSD instance should be
49 * freed via qsd_fini().
52 #define DEBUG_SUBSYSTEM S_LQUOTA
54 #include <obd_class.h>
55 #include "qsd_internal.h"
57 struct kmem_cache *upd_kmem;
59 struct lu_kmem_descr qsd_caches[] = {
61 .ckd_cache = &upd_kmem,
62 .ckd_name = "upd_kmem",
63 .ckd_size = sizeof(struct qsd_upd_rec)
70 /* define qsd thread key */
71 LU_KEY_INIT_FINI(qsd, struct qsd_thread_info);
72 LU_CONTEXT_KEY_DEFINE(qsd, LCT_MD_THREAD | LCT_DT_THREAD | LCT_LOCAL);
73 LU_KEY_INIT_GENERIC(qsd);
75 /* some procfs helpers */
76 static int qsd_state_seq_show(struct seq_file *m, void *data)
78 struct qsd_instance *qsd = m->private;
83 memset(enabled, 0, sizeof(enabled));
84 if (qsd_type_enabled(qsd, USRQUOTA))
86 if (qsd_type_enabled(qsd, GRPQUOTA))
88 if (strlen(enabled) == 0)
89 strcat(enabled, "none");
91 seq_printf(m, "target name: %s\n"
95 "conn to master: %s\n",
96 qsd->qsd_svname, qsd->qsd_pool_id,
97 qsd->qsd_is_md ? "md" : "dt", enabled,
98 qsd->qsd_exp_valid ? "setup" : "not setup yet");
100 if (qsd->qsd_prepared) {
101 memset(enabled, 0, sizeof(enabled));
102 if (qsd->qsd_type_array[USRQUOTA]->qqi_acct_obj != NULL)
103 strcat(enabled, "u");
104 if (qsd->qsd_type_array[GRPQUOTA]->qqi_acct_obj != NULL)
105 strcat(enabled, "g");
106 if (strlen(enabled) == 0)
107 strcat(enabled, "none");
108 seq_printf(m, "space acct: %s\n"
109 "user uptodate: glb[%d],slv[%d],reint[%d]\n"
110 "group uptodate: glb[%d],slv[%d],reint[%d]\n",
112 qsd->qsd_type_array[USRQUOTA]->qqi_glb_uptodate,
113 qsd->qsd_type_array[USRQUOTA]->qqi_slv_uptodate,
114 qsd->qsd_type_array[USRQUOTA]->qqi_reint,
115 qsd->qsd_type_array[GRPQUOTA]->qqi_glb_uptodate,
116 qsd->qsd_type_array[GRPQUOTA]->qqi_slv_uptodate,
117 qsd->qsd_type_array[GRPQUOTA]->qqi_reint);
121 LPROC_SEQ_FOPS_RO(qsd_state);
123 static int qsd_enabled_seq_show(struct seq_file *m, void *data)
125 struct qsd_instance *qsd = m->private;
128 LASSERT(qsd != NULL);
130 memset(enabled, 0, sizeof(enabled));
131 if (qsd_type_enabled(qsd, USRQUOTA))
132 strcat(enabled, "u");
133 if (qsd_type_enabled(qsd, GRPQUOTA))
134 strcat(enabled, "g");
135 if (strlen(enabled) == 0)
136 strcat(enabled, "none");
138 seq_printf(m, "%s\n", enabled);
141 LPROC_SEQ_FOPS_RO(qsd_enabled);
143 /* force reintegration procedure to be executed.
144 * Used for test/debugging purpose */
146 lprocfs_force_reint_seq_write(struct file *file, const char __user *buffer,
147 size_t count, loff_t *off)
149 struct qsd_instance *qsd = ((struct seq_file *)file->private_data)->private;
152 LASSERT(qsd != NULL);
154 write_lock(&qsd->qsd_lock);
155 if (qsd->qsd_stopping) {
156 /* don't mess up with shutdown procedure, it is already
157 * complicated enough */
159 } else if (!qsd->qsd_prepared) {
162 /* mark all indexes as stale */
163 for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++) {
164 qsd->qsd_type_array[qtype]->qqi_glb_uptodate = false;
165 qsd->qsd_type_array[qtype]->qqi_slv_uptodate = false;
168 write_unlock(&qsd->qsd_lock);
173 /* kick off reintegration */
174 for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++) {
175 rc = qsd_start_reint_thread(qsd->qsd_type_array[qtype]);
179 return rc == 0 ? count : rc;
181 LPROC_SEQ_FOPS_WO_TYPE(qsd, force_reint);
183 static int qsd_timeout_seq_show(struct seq_file *m, void *data)
185 struct qsd_instance *qsd = m->private;
186 LASSERT(qsd != NULL);
188 seq_printf(m, "%d\n", qsd_wait_timeout(qsd));
193 qsd_timeout_seq_write(struct file *file, const char __user *buffer,
194 size_t count, loff_t *off)
196 struct qsd_instance *qsd = ((struct seq_file *)file->private_data)->private;
198 LASSERT(qsd != NULL);
200 rc = lprocfs_write_helper(buffer, count, &timeout);
206 qsd->qsd_timeout = timeout;
209 LPROC_SEQ_FOPS(qsd_timeout);
211 static struct lprocfs_vars lprocfs_quota_qsd_vars[] = {
213 .fops = &qsd_state_fops },
215 .fops = &qsd_enabled_fops },
216 { .name = "force_reint",
217 .fops = &qsd_force_reint_fops },
219 .fops = &qsd_timeout_fops },
224 * Callback function invoked by the OSP layer when the connection to the master
227 * \param data - is a pointer to the qsd_instance
229 * \retval - 0 on success, appropriate error on failure
231 static int qsd_conn_callback(void *data)
233 struct qsd_instance *qsd = (struct qsd_instance *)data;
237 /* qsd_exp should now be valid */
238 LASSERT(qsd->qsd_exp);
240 qsd->qsd_ns = class_exp2obd(qsd->qsd_exp)->obd_namespace;
242 write_lock(&qsd->qsd_lock);
243 /* notify that qsd_exp is now valid */
244 qsd->qsd_exp_valid = true;
245 write_unlock(&qsd->qsd_lock);
247 /* Now that the connection to master is setup, we can initiate the
248 * reintegration procedure for quota types which are enabled.
249 * It is worth noting that, if the qsd_instance hasn't been started
250 * already, then we can only complete the first two steps of the
251 * reintegration procedure (i.e. global lock enqueue and slave
252 * index transfer) since the space usage reconciliation (i.e.
253 * step 3) will have to wait for qsd_start() to be called */
254 for (type = USRQUOTA; type < MAXQUOTAS; type++) {
255 struct qsd_qtype_info *qqi = qsd->qsd_type_array[type];
256 wake_up(&qqi->qqi_reint_thread.t_ctl_waitq);
263 * Release qsd_qtype_info structure which contains data associated with a
264 * given quota type. This releases the accounting objects.
265 * It's called on OSD cleanup when the qsd instance is released.
267 * \param env - is the environment passed by the caller
268 * \param qsd - is the qsd instance managing the qsd_qtype_info structure
270 * \param qtype - is the quota type to be shutdown
272 static void qsd_qtype_fini(const struct lu_env *env, struct qsd_instance *qsd,
275 struct qsd_qtype_info *qqi;
279 if (qsd->qsd_type_array[qtype] == NULL)
281 qqi = qsd->qsd_type_array[qtype];
282 qsd->qsd_type_array[qtype] = NULL;
284 /* all deferred work lists should be empty */
285 LASSERT(list_empty(&qqi->qqi_deferred_glb));
286 LASSERT(list_empty(&qqi->qqi_deferred_slv));
288 /* shutdown lquota site */
289 if (qqi->qqi_site != NULL && !IS_ERR(qqi->qqi_site)) {
290 lquota_site_free(env, qqi->qqi_site);
291 qqi->qqi_site = NULL;
294 /* The qqi may still be holding by global locks which are being
295 * canceled asynchronously (LU-4365), see the following steps:
297 * - On server umount, we try to clear all quota locks first by
298 * disconnecting LWP (which will invalidate import and cleanup
299 * all locks on it), however, if quota reint process is holding
300 * the global lock for reintegration at that time, global lock
301 * will fail to be cleared on LWP disconnection.
303 * - Umount process goes on and stops reint process, the global
304 * lock will be dropped on reint process exit, however, the lock
305 * cancel in done in asynchronous way, so the
306 * qsd_glb_blocking_ast() might haven't been called yet when we
309 while (atomic_read(&qqi->qqi_ref) > 1) {
310 CDEBUG(D_QUOTA, "qqi reference count %u, repeat: %d\n",
311 atomic_read(&qqi->qqi_ref), repeat);
313 set_current_state(TASK_INTERRUPTIBLE);
314 schedule_timeout(cfs_time_seconds(1));
317 /* by now, all qqi users should have gone away */
318 LASSERT(atomic_read(&qqi->qqi_ref) == 1);
319 lu_ref_fini(&qqi->qqi_reference);
321 /* release accounting object */
322 if (qqi->qqi_acct_obj != NULL && !IS_ERR(qqi->qqi_acct_obj)) {
323 lu_object_put(env, &qqi->qqi_acct_obj->do_lu);
324 qqi->qqi_acct_obj = NULL;
327 /* release slv index */
328 if (qqi->qqi_slv_obj != NULL && !IS_ERR(qqi->qqi_slv_obj)) {
329 lu_object_put(env, &qqi->qqi_slv_obj->do_lu);
330 qqi->qqi_slv_obj = NULL;
331 qqi->qqi_slv_ver = 0;
334 /* release global index */
335 if (qqi->qqi_glb_obj != NULL && !IS_ERR(qqi->qqi_glb_obj)) {
336 lu_object_put(env, &qqi->qqi_glb_obj->do_lu);
337 qqi->qqi_glb_obj = NULL;
338 qqi->qqi_glb_ver = 0;
346 * Allocate and initialize a qsd_qtype_info structure for quota type \qtype.
347 * This opens the accounting object and initializes the proc file.
348 * It's called on OSD start when the qsd_prepare() is invoked on the qsd
351 * \param env - the environment passed by the caller
352 * \param qsd - is the qsd instance which will be in charge of the new
353 * qsd_qtype_info instance.
354 * \param qtype - is quota type to set up
356 * \retval - 0 on success and qsd->qsd_type_array[qtype] is allocated,
357 * appropriate error on failure
359 static int qsd_qtype_init(const struct lu_env *env, struct qsd_instance *qsd,
362 struct qsd_qtype_info *qqi;
364 struct obd_uuid uuid;
367 LASSERT(qsd->qsd_type_array[qtype] == NULL);
369 /* allocate structure for this quota type */
373 qsd->qsd_type_array[qtype] = qqi;
374 atomic_set(&qqi->qqi_ref, 1); /* referenced from qsd */
376 /* set backpointer and other parameters */
378 qqi->qqi_qtype = qtype;
379 lu_ref_init(&qqi->qqi_reference);
380 lquota_generate_fid(&qqi->qqi_fid, qsd->qsd_pool_id, QSD_RES_TYPE(qsd),
382 qqi->qqi_glb_uptodate = false;
383 qqi->qqi_slv_uptodate = false;
384 qqi->qqi_reint = false;
385 init_waitqueue_head(&qqi->qqi_reint_thread.t_ctl_waitq);
386 thread_set_flags(&qqi->qqi_reint_thread, SVC_STOPPED);
387 INIT_LIST_HEAD(&qqi->qqi_deferred_glb);
388 INIT_LIST_HEAD(&qqi->qqi_deferred_slv);
390 /* open accounting object */
391 LASSERT(qqi->qqi_acct_obj == NULL);
392 qqi->qqi_acct_obj = acct_obj_lookup(env, qsd->qsd_dev, qtype);
393 if (IS_ERR(qqi->qqi_acct_obj)) {
394 CDEBUG(D_QUOTA, "%s: no %s space accounting support rc:%ld\n",
395 qsd->qsd_svname, QTYPE_NAME(qtype),
396 PTR_ERR(qqi->qqi_acct_obj));
397 qqi->qqi_acct_obj = NULL;
398 qsd->qsd_acct_failed = true;
401 /* open global index copy */
402 LASSERT(qqi->qqi_glb_obj == NULL);
403 qqi->qqi_glb_obj = lquota_disk_glb_find_create(env, qsd->qsd_dev,
405 &qqi->qqi_fid, true);
406 if (IS_ERR(qqi->qqi_glb_obj)) {
407 CERROR("%s: can't open global index copy "DFID" %ld\n",
408 qsd->qsd_svname, PFID(&qqi->qqi_fid),
409 PTR_ERR(qqi->qqi_glb_obj));
410 GOTO(out, rc = PTR_ERR(qqi->qqi_glb_obj));
412 qqi->qqi_glb_ver = dt_version_get(env, qqi->qqi_glb_obj);
414 /* open slave index copy */
415 LASSERT(qqi->qqi_slv_obj == NULL);
416 obd_str2uuid(&uuid, qsd->qsd_svname);
417 qqi->qqi_slv_obj = lquota_disk_slv_find_create(env, qsd->qsd_dev,
419 &qqi->qqi_fid, &uuid,
421 if (IS_ERR(qqi->qqi_slv_obj)) {
422 CERROR("%s: can't open slave index copy "DFID" %ld\n",
423 qsd->qsd_svname, PFID(&qqi->qqi_fid),
424 PTR_ERR(qqi->qqi_slv_obj));
425 GOTO(out, rc = PTR_ERR(qqi->qqi_slv_obj));
427 qqi->qqi_slv_ver = dt_version_get(env, qqi->qqi_slv_obj);
430 qqi->qqi_site = lquota_site_alloc(env, qqi, false, qtype, &qsd_lqe_ops);
431 if (IS_ERR(qqi->qqi_site)) {
432 CERROR("%s: can't allocate site "DFID" %ld\n", qsd->qsd_svname,
433 PFID(&qqi->qqi_fid), PTR_ERR(qqi->qqi_site));
434 GOTO(out, rc = PTR_ERR(qqi->qqi_site));
437 /* register proc entry for accounting & global index copy objects */
438 rc = lprocfs_seq_create(qsd->qsd_proc,
439 qtype == USRQUOTA ? "acct_user" : "acct_group",
440 0444, &lprocfs_quota_seq_fops,
443 CERROR("%s: can't add procfs entry for accounting file %d\n",
444 qsd->qsd_svname, rc);
448 rc = lprocfs_seq_create(qsd->qsd_proc,
449 qtype == USRQUOTA ? "limit_user" : "limit_group",
450 0444, &lprocfs_quota_seq_fops,
453 CERROR("%s: can't add procfs entry for global index copy %d\n",
454 qsd->qsd_svname, rc);
460 qsd_qtype_fini(env, qsd, qtype);
465 * Release a qsd_instance. Companion of qsd_init(). This releases all data
466 * structures associated with the quota slave (on-disk objects, lquota entry
468 * This function should be called when the OSD is shutting down.
470 * \param env - is the environment passed by the caller
471 * \param qsd - is the qsd instance to shutdown
473 void qsd_fini(const struct lu_env *env, struct qsd_instance *qsd)
478 if (unlikely(qsd == NULL))
481 CDEBUG(D_QUOTA, "%s: initiating QSD shutdown\n", qsd->qsd_svname);
482 write_lock(&qsd->qsd_lock);
483 qsd->qsd_stopping = true;
484 write_unlock(&qsd->qsd_lock);
486 /* remove qsd proc entry */
487 if (qsd->qsd_proc != NULL) {
488 lprocfs_remove(&qsd->qsd_proc);
489 qsd->qsd_proc = NULL;
492 /* stop the writeback thread */
493 qsd_stop_upd_thread(qsd);
495 /* shutdown the reintegration threads */
496 for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++) {
497 if (qsd->qsd_type_array[qtype] == NULL)
499 qsd_stop_reint_thread(qsd->qsd_type_array[qtype]);
502 if (qsd->qsd_ns != NULL) {
506 /* free per-quota type data */
507 for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++)
508 qsd_qtype_fini(env, qsd, qtype);
510 /* deregister connection to the quota master */
511 qsd->qsd_exp_valid = false;
512 lustre_deregister_lwp_item(&qsd->qsd_exp);
514 /* release per-filesystem information */
515 if (qsd->qsd_fsinfo != NULL) {
516 mutex_lock(&qsd->qsd_fsinfo->qfs_mutex);
517 /* remove from the list of fsinfo */
518 list_del_init(&qsd->qsd_link);
519 mutex_unlock(&qsd->qsd_fsinfo->qfs_mutex);
520 qsd_put_fsinfo(qsd->qsd_fsinfo);
521 qsd->qsd_fsinfo = NULL;
524 /* release quota root directory */
525 if (qsd->qsd_root != NULL) {
526 lu_object_put(env, &qsd->qsd_root->do_lu);
527 qsd->qsd_root = NULL;
530 /* release reference on dt_device */
531 if (qsd->qsd_dev != NULL) {
532 lu_ref_del(&qsd->qsd_dev->dd_lu_dev.ld_reference, "qsd", qsd);
533 lu_device_put(&qsd->qsd_dev->dd_lu_dev);
537 CDEBUG(D_QUOTA, "%s: QSD shutdown completed\n", qsd->qsd_svname);
541 EXPORT_SYMBOL(qsd_fini);
544 * Create a new qsd_instance to be associated with backend osd device
545 * identified by \dev.
547 * \param env - the environment passed by the caller
548 * \param svname - is the service name of the OSD device creating this instance
549 * \param dev - is the dt_device where to store quota index files
550 * \param osd_proc - is the procfs parent directory where to create procfs file
551 * related to this new qsd instance
553 * \retval - pointer to new qsd_instance associated with dev \dev on success,
554 * appropriate error on failure
556 struct qsd_instance *qsd_init(const struct lu_env *env, char *svname,
557 struct dt_device *dev,
558 struct proc_dir_entry *osd_proc)
560 struct qsd_thread_info *qti = qsd_info(env);
561 struct qsd_instance *qsd;
565 /* only configure qsd for MDT & OST */
566 type = server_name2index(svname, &idx, NULL);
567 if (type != LDD_F_SV_TYPE_MDT && type != LDD_F_SV_TYPE_OST)
570 /* allocate qsd instance */
573 RETURN(ERR_PTR(-ENOMEM));
575 /* generic initializations */
576 rwlock_init(&qsd->qsd_lock);
577 INIT_LIST_HEAD(&qsd->qsd_link);
578 thread_set_flags(&qsd->qsd_upd_thread, SVC_STOPPED);
579 init_waitqueue_head(&qsd->qsd_upd_thread.t_ctl_waitq);
580 INIT_LIST_HEAD(&qsd->qsd_upd_list);
581 spin_lock_init(&qsd->qsd_adjust_lock);
582 INIT_LIST_HEAD(&qsd->qsd_adjust_list);
583 qsd->qsd_prepared = false;
584 qsd->qsd_started = false;
586 /* copy service name */
587 if (strlcpy(qsd->qsd_svname, svname, sizeof(qsd->qsd_svname))
588 >= sizeof(qsd->qsd_svname))
589 GOTO(out, rc = -E2BIG);
591 /* grab reference on osd device */
592 lu_device_get(&dev->dd_lu_dev);
593 lu_ref_add(&dev->dd_lu_dev.ld_reference, "qsd", qsd);
596 /* we only support pool ID 0 (default data or metadata pool) for the
597 * time being. A different pool ID could be assigned to this target via
598 * the configuration log in the future */
599 qsd->qsd_pool_id = 0;
601 /* get fsname from svname */
602 rc = server_name2fsname(svname, qti->qti_buf, NULL);
604 CERROR("%s: fail to extract filesystem name\n", svname);
608 /* look up quota setting for the filesystem the target belongs to */
609 qsd->qsd_fsinfo = qsd_get_fsinfo(qti->qti_buf, 1);
610 if (qsd->qsd_fsinfo == NULL) {
611 CERROR("%s: failed to locate filesystem information\n", svname);
612 GOTO(out, rc = -EINVAL);
615 /* add in the list of lquota_fsinfo */
616 mutex_lock(&qsd->qsd_fsinfo->qfs_mutex);
617 list_add_tail(&qsd->qsd_link, &qsd->qsd_fsinfo->qfs_qsd_list);
618 mutex_unlock(&qsd->qsd_fsinfo->qfs_mutex);
620 /* register procfs directory */
621 qsd->qsd_proc = lprocfs_register(QSD_DIR, osd_proc,
622 lprocfs_quota_qsd_vars, qsd);
623 if (IS_ERR(qsd->qsd_proc)) {
624 rc = PTR_ERR(qsd->qsd_proc);
625 qsd->qsd_proc = NULL;
626 CERROR("%s: fail to create quota slave proc entry (%d)\n",
638 EXPORT_SYMBOL(qsd_init);
641 * Initialize on-disk structures in order to manage quota enforcement for
642 * the target associated with the qsd instance \qsd and starts the reintegration
643 * procedure for each quota type as soon as possible.
644 * The last step of the reintegration will be completed once qsd_start() is
645 * called, at which points the space reconciliation with the master will be
647 * This function must be called when the server stack is fully configured,
648 * typically when ->ldo_prepare is called across the stack.
650 * \param env - the environment passed by the caller
651 * \param qsd - is qsd_instance to prepare
653 * \retval - 0 on success, appropriate error on failure
655 int qsd_prepare(const struct lu_env *env, struct qsd_instance *qsd)
657 struct qsd_thread_info *qti = qsd_info(env);
661 if (unlikely(qsd == NULL))
664 read_lock(&qsd->qsd_lock);
665 if (qsd->qsd_prepared) {
666 CERROR("%s: qsd instance already prepared\n", qsd->qsd_svname);
669 read_unlock(&qsd->qsd_lock);
673 /* Record whether this qsd instance is managing quota enforcement for a
674 * MDT (i.e. inode quota) or OST (block quota) */
675 if (lu_device_is_md(qsd->qsd_dev->dd_lu_dev.ld_site->ls_top_dev)) {
676 qsd->qsd_is_md = true;
677 qsd->qsd_sync_threshold = LQUOTA_LEAST_QUNIT(LQUOTA_RES_MD);
679 qsd->qsd_sync_threshold = LQUOTA_LEAST_QUNIT(LQUOTA_RES_DT);
682 /* look-up on-disk directory for the quota slave */
683 qsd->qsd_root = lquota_disk_dir_find_create(env, qsd->qsd_dev, NULL,
685 if (IS_ERR(qsd->qsd_root)) {
686 rc = PTR_ERR(qsd->qsd_root);
687 qsd->qsd_root = NULL;
688 CERROR("%s: failed to create quota slave root dir (%d)\n",
689 qsd->qsd_svname, rc);
693 /* initialize per-quota type data */
694 for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++) {
695 rc = qsd_qtype_init(env, qsd, qtype);
700 /* pools successfully setup, mark the qsd as prepared */
701 write_lock(&qsd->qsd_lock);
702 qsd->qsd_prepared = true;
703 write_unlock(&qsd->qsd_lock);
705 /* start reintegration thread for each type, if required */
706 for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++) {
707 struct qsd_qtype_info *qqi = qsd->qsd_type_array[qtype];
709 if (qsd_type_enabled(qsd, qtype) && qsd->qsd_acct_failed) {
710 LCONSOLE_ERROR("%s: can't enable quota enforcement "
711 "since space accounting isn't functional"
712 ". Please run tunefs.lustre --quota on "
713 "an unmounted filesystem if not done "
714 "already\n", qsd->qsd_svname);
718 rc = qsd_start_reint_thread(qqi);
720 CERROR("%s: failed to start reint thread for type %s "
721 "(%d)\n", qsd->qsd_svname, QTYPE_NAME(qtype),
727 /* start writeback thread */
728 rc = qsd_start_upd_thread(qsd);
730 CERROR("%s: failed to start writeback thread (%d)\n",
731 qsd->qsd_svname, rc);
735 /* generate osp name */
736 rc = tgt_name2lwp_name(qsd->qsd_svname, qti->qti_buf,
739 CERROR("%s: failed to generate ospname (%d)\n",
740 qsd->qsd_svname, rc);
744 /* the connection callback will start the reintegration
745 * procedure if quota is enabled */
746 rc = lustre_register_lwp_item(qti->qti_buf, &qsd->qsd_exp,
747 qsd_conn_callback, (void *)qsd);
749 CERROR("%s: fail to get connection to master (%d)\n",
750 qsd->qsd_svname, rc);
756 EXPORT_SYMBOL(qsd_prepare);
759 * Start a qsd instance. This will complete the last step of the reintegration
760 * procedure as soon as possible (provided that the master is reachable).
761 * This should be called when recovery has been completed and quota should now
762 * be enforced on every operations.
764 * \param env - the environment passed by the caller
765 * \param qsd - is the qsd instance associated with the osd device to start
767 int qsd_start(const struct lu_env *env, struct qsd_instance *qsd)
772 if (unlikely(qsd == NULL))
775 write_lock(&qsd->qsd_lock);
776 if (!qsd->qsd_prepared) {
777 CERROR("%s: can't start qsd instance since it wasn't properly "
778 "initialized\n", qsd->qsd_svname);
780 } else if (qsd->qsd_started) {
781 CERROR("%s: qsd instance already started\n", qsd->qsd_svname);
784 /* notify that the qsd_instance is now started */
785 qsd->qsd_started = true;
787 write_unlock(&qsd->qsd_lock);
792 /* Trigger the 3rd step of reintegration: If usage > granted, acquire
793 * up to usage; If usage < granted, release down to usage. */
794 for (type = USRQUOTA; type < MAXQUOTAS; type++) {
795 struct qsd_qtype_info *qqi = qsd->qsd_type_array[type];
796 wake_up(&qqi->qqi_reint_thread.t_ctl_waitq);
801 EXPORT_SYMBOL(qsd_start);
803 void lustre_register_quota_process_config(int (*qpc)(struct lustre_cfg *lcfg));
806 * Global initialization performed at module load time
808 int qsd_glb_init(void)
812 rc = lu_kmem_init(qsd_caches);
816 qsd_key_init_generic(&qsd_thread_key, NULL);
817 lu_context_key_register(&qsd_thread_key);
818 lustre_register_quota_process_config(qsd_process_config);
824 * Companion of qsd_glb_init() called at module unload time
826 void qsd_glb_fini(void)
828 lustre_register_quota_process_config(NULL);
829 lu_kmem_fini(qsd_caches);
830 lu_context_key_degister(&qsd_thread_key);