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, 2013, 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;
84 memset(enabled, 0, sizeof(enabled));
85 if (qsd_type_enabled(qsd, USRQUOTA))
87 if (qsd_type_enabled(qsd, GRPQUOTA))
89 if (strlen(enabled) == 0)
90 strcat(enabled, "none");
92 rc = seq_printf(m, "target name: %s\n"
96 "conn to master: %s\n",
97 qsd->qsd_svname, qsd->qsd_pool_id,
98 qsd->qsd_is_md ? "md" : "dt", enabled,
99 qsd->qsd_exp_valid ? "setup" : "not setup yet");
101 if (qsd->qsd_prepared) {
102 memset(enabled, 0, sizeof(enabled));
103 if (qsd->qsd_type_array[USRQUOTA]->qqi_acct_obj != NULL)
104 strcat(enabled, "u");
105 if (qsd->qsd_type_array[GRPQUOTA]->qqi_acct_obj != NULL)
106 strcat(enabled, "g");
107 if (strlen(enabled) == 0)
108 strcat(enabled, "none");
109 rc += seq_printf(m, "space acct: %s\n"
110 "user uptodate: glb[%d],slv[%d],reint[%d]\n"
111 "group uptodate: glb[%d],slv[%d],reint[%d]\n",
113 qsd->qsd_type_array[USRQUOTA]->qqi_glb_uptodate,
114 qsd->qsd_type_array[USRQUOTA]->qqi_slv_uptodate,
115 qsd->qsd_type_array[USRQUOTA]->qqi_reint,
116 qsd->qsd_type_array[GRPQUOTA]->qqi_glb_uptodate,
117 qsd->qsd_type_array[GRPQUOTA]->qqi_slv_uptodate,
118 qsd->qsd_type_array[GRPQUOTA]->qqi_reint);
122 LPROC_SEQ_FOPS_RO(qsd_state);
124 static int qsd_enabled_seq_show(struct seq_file *m, void *data)
126 struct qsd_instance *qsd = m->private;
129 LASSERT(qsd != NULL);
131 memset(enabled, 0, sizeof(enabled));
132 if (qsd_type_enabled(qsd, USRQUOTA))
133 strcat(enabled, "u");
134 if (qsd_type_enabled(qsd, GRPQUOTA))
135 strcat(enabled, "g");
136 if (strlen(enabled) == 0)
137 strcat(enabled, "none");
139 return 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 *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 return seq_printf(m, "%d\n", qsd_wait_timeout(qsd));
192 qsd_timeout_seq_write(struct file *file, const char *buffer,
193 size_t count, loff_t *off)
195 struct qsd_instance *qsd = ((struct seq_file *)file->private_data)->private;
197 LASSERT(qsd != NULL);
199 rc = lprocfs_write_helper(buffer, count, &timeout);
205 qsd->qsd_timeout = timeout;
208 LPROC_SEQ_FOPS(qsd_timeout);
210 static struct lprocfs_vars lprocfs_quota_qsd_vars[] = {
212 .fops = &qsd_state_fops },
214 .fops = &qsd_enabled_fops },
215 { .name = "force_reint",
216 .fops = &qsd_force_reint_fops },
218 .fops = &qsd_timeout_fops },
223 * Callback function invoked by the OSP layer when the connection to the master
226 * \param data - is a pointer to the qsd_instance
228 * \retval - 0 on success, appropriate error on failure
230 static int qsd_conn_callback(void *data)
232 struct qsd_instance *qsd = (struct qsd_instance *)data;
236 /* qsd_exp should now be valid */
237 LASSERT(qsd->qsd_exp);
239 qsd->qsd_ns = class_exp2obd(qsd->qsd_exp)->obd_namespace;
241 write_lock(&qsd->qsd_lock);
242 /* notify that qsd_exp is now valid */
243 qsd->qsd_exp_valid = true;
244 write_unlock(&qsd->qsd_lock);
246 /* Now that the connection to master is setup, we can initiate the
247 * reintegration procedure for quota types which are enabled.
248 * It is worth noting that, if the qsd_instance hasn't been started
249 * already, then we can only complete the first two steps of the
250 * reintegration procedure (i.e. global lock enqueue and slave
251 * index transfer) since the space usage reconciliation (i.e.
252 * step 3) will have to wait for qsd_start() to be called */
253 for (type = USRQUOTA; type < MAXQUOTAS; type++) {
254 struct qsd_qtype_info *qqi = qsd->qsd_type_array[type];
255 wake_up(&qqi->qqi_reint_thread.t_ctl_waitq);
262 * Release qsd_qtype_info structure which contains data associated with a
263 * given quota type. This releases the accounting objects.
264 * It's called on OSD cleanup when the qsd instance is released.
266 * \param env - is the environment passed by the caller
267 * \param qsd - is the qsd instance managing the qsd_qtype_info structure
269 * \param qtype - is the quota type to be shutdown
271 static void qsd_qtype_fini(const struct lu_env *env, struct qsd_instance *qsd,
274 struct qsd_qtype_info *qqi;
278 if (qsd->qsd_type_array[qtype] == NULL)
280 qqi = qsd->qsd_type_array[qtype];
281 qsd->qsd_type_array[qtype] = NULL;
283 /* all deferred work lists should be empty */
284 LASSERT(list_empty(&qqi->qqi_deferred_glb));
285 LASSERT(list_empty(&qqi->qqi_deferred_slv));
287 /* shutdown lquota site */
288 if (qqi->qqi_site != NULL && !IS_ERR(qqi->qqi_site)) {
289 lquota_site_free(env, qqi->qqi_site);
290 qqi->qqi_site = NULL;
293 /* The qqi may still be holding by global locks which are being
294 * canceled asynchronously (LU-4365), see the following steps:
296 * - On server umount, we try to clear all quota locks first by
297 * disconnecting LWP (which will invalidate import and cleanup
298 * all locks on it), however, if quota reint process is holding
299 * the global lock for reintegration at that time, global lock
300 * will fail to be cleared on LWP disconnection.
302 * - Umount process goes on and stops reint process, the global
303 * lock will be dropped on reint process exit, however, the lock
304 * cancel in done in asynchronous way, so the
305 * qsd_glb_blocking_ast() might haven't been called yet when we
308 while (atomic_read(&qqi->qqi_ref) > 1) {
309 CDEBUG(D_QUOTA, "qqi reference count %u, repeat: %d\n",
310 atomic_read(&qqi->qqi_ref), repeat);
312 schedule_timeout_and_set_state(TASK_INTERRUPTIBLE,
313 cfs_time_seconds(1));
316 /* by now, all qqi users should have gone away */
317 LASSERT(atomic_read(&qqi->qqi_ref) == 1);
318 lu_ref_fini(&qqi->qqi_reference);
320 /* release accounting object */
321 if (qqi->qqi_acct_obj != NULL && !IS_ERR(qqi->qqi_acct_obj)) {
322 lu_object_put(env, &qqi->qqi_acct_obj->do_lu);
323 qqi->qqi_acct_obj = NULL;
326 /* release slv index */
327 if (qqi->qqi_slv_obj != NULL && !IS_ERR(qqi->qqi_slv_obj)) {
328 lu_object_put(env, &qqi->qqi_slv_obj->do_lu);
329 qqi->qqi_slv_obj = NULL;
330 qqi->qqi_slv_ver = 0;
333 /* release global index */
334 if (qqi->qqi_glb_obj != NULL && !IS_ERR(qqi->qqi_glb_obj)) {
335 lu_object_put(env, &qqi->qqi_glb_obj->do_lu);
336 qqi->qqi_glb_obj = NULL;
337 qqi->qqi_glb_ver = 0;
345 * Allocate and initialize a qsd_qtype_info structure for quota type \qtype.
346 * This opens the accounting object and initializes the proc file.
347 * It's called on OSD start when the qsd_prepare() is invoked on the qsd
350 * \param env - the environment passed by the caller
351 * \param qsd - is the qsd instance which will be in charge of the new
352 * qsd_qtype_info instance.
353 * \param qtype - is quota type to set up
355 * \retval - 0 on success and qsd->qsd_type_array[qtype] is allocated,
356 * appropriate error on failure
358 static int qsd_qtype_init(const struct lu_env *env, struct qsd_instance *qsd,
361 struct qsd_qtype_info *qqi;
363 struct obd_uuid uuid;
366 LASSERT(qsd->qsd_type_array[qtype] == NULL);
368 /* allocate structure for this quota type */
372 qsd->qsd_type_array[qtype] = qqi;
373 atomic_set(&qqi->qqi_ref, 1); /* referenced from qsd */
375 /* set backpointer and other parameters */
377 qqi->qqi_qtype = qtype;
378 lu_ref_init(&qqi->qqi_reference);
379 lquota_generate_fid(&qqi->qqi_fid, qsd->qsd_pool_id, QSD_RES_TYPE(qsd),
381 qqi->qqi_glb_uptodate = false;
382 qqi->qqi_slv_uptodate = false;
383 qqi->qqi_reint = false;
384 init_waitqueue_head(&qqi->qqi_reint_thread.t_ctl_waitq);
385 thread_set_flags(&qqi->qqi_reint_thread, SVC_STOPPED);
386 INIT_LIST_HEAD(&qqi->qqi_deferred_glb);
387 INIT_LIST_HEAD(&qqi->qqi_deferred_slv);
389 /* open accounting object */
390 LASSERT(qqi->qqi_acct_obj == NULL);
391 qqi->qqi_acct_obj = acct_obj_lookup(env, qsd->qsd_dev, qtype);
392 if (IS_ERR(qqi->qqi_acct_obj)) {
393 CDEBUG(D_QUOTA, "%s: no %s space accounting support rc:%ld\n",
394 qsd->qsd_svname, QTYPE_NAME(qtype),
395 PTR_ERR(qqi->qqi_acct_obj));
396 qqi->qqi_acct_obj = NULL;
397 qsd->qsd_acct_failed = true;
400 /* open global index copy */
401 LASSERT(qqi->qqi_glb_obj == NULL);
402 qqi->qqi_glb_obj = lquota_disk_glb_find_create(env, qsd->qsd_dev,
404 &qqi->qqi_fid, true);
405 if (IS_ERR(qqi->qqi_glb_obj)) {
406 CERROR("%s: can't open global index copy "DFID" %ld\n",
407 qsd->qsd_svname, PFID(&qqi->qqi_fid),
408 PTR_ERR(qqi->qqi_glb_obj));
409 GOTO(out, rc = PTR_ERR(qqi->qqi_glb_obj));
411 qqi->qqi_glb_ver = dt_version_get(env, qqi->qqi_glb_obj);
413 /* open slave index copy */
414 LASSERT(qqi->qqi_slv_obj == NULL);
415 obd_str2uuid(&uuid, qsd->qsd_svname);
416 qqi->qqi_slv_obj = lquota_disk_slv_find_create(env, qsd->qsd_dev,
418 &qqi->qqi_fid, &uuid,
420 if (IS_ERR(qqi->qqi_slv_obj)) {
421 CERROR("%s: can't open slave index copy "DFID" %ld\n",
422 qsd->qsd_svname, PFID(&qqi->qqi_fid),
423 PTR_ERR(qqi->qqi_slv_obj));
424 GOTO(out, rc = PTR_ERR(qqi->qqi_slv_obj));
426 qqi->qqi_slv_ver = dt_version_get(env, qqi->qqi_slv_obj);
429 qqi->qqi_site = lquota_site_alloc(env, qqi, false, qtype, &qsd_lqe_ops);
430 if (IS_ERR(qqi->qqi_site)) {
431 CERROR("%s: can't allocate site "DFID" %ld\n", qsd->qsd_svname,
432 PFID(&qqi->qqi_fid), PTR_ERR(qqi->qqi_site));
433 GOTO(out, rc = PTR_ERR(qqi->qqi_site));
436 /* register proc entry for accounting & global index copy objects */
437 rc = lprocfs_seq_create(qsd->qsd_proc,
438 qtype == USRQUOTA ? "acct_user" : "acct_group",
439 0444, &lprocfs_quota_seq_fops,
442 CERROR("%s: can't add procfs entry for accounting file %d\n",
443 qsd->qsd_svname, rc);
447 rc = lprocfs_seq_create(qsd->qsd_proc,
448 qtype == USRQUOTA ? "limit_user" : "limit_group",
449 0444, &lprocfs_quota_seq_fops,
452 CERROR("%s: can't add procfs entry for global index copy %d\n",
453 qsd->qsd_svname, rc);
459 qsd_qtype_fini(env, qsd, qtype);
464 * Release a qsd_instance. Companion of qsd_init(). This releases all data
465 * structures associated with the quota slave (on-disk objects, lquota entry
467 * This function should be called when the OSD is shutting down.
469 * \param env - is the environment passed by the caller
470 * \param qsd - is the qsd instance to shutdown
472 void qsd_fini(const struct lu_env *env, struct qsd_instance *qsd)
477 if (unlikely(qsd == NULL))
480 CDEBUG(D_QUOTA, "%s: initiating QSD shutdown\n", qsd->qsd_svname);
481 write_lock(&qsd->qsd_lock);
482 qsd->qsd_stopping = true;
483 write_unlock(&qsd->qsd_lock);
485 /* remove qsd proc entry */
486 if (qsd->qsd_proc != NULL) {
487 lprocfs_remove(&qsd->qsd_proc);
488 qsd->qsd_proc = NULL;
491 /* stop the writeback thread */
492 qsd_stop_upd_thread(qsd);
494 /* shutdown the reintegration threads */
495 for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++) {
496 if (qsd->qsd_type_array[qtype] == NULL)
498 qsd_stop_reint_thread(qsd->qsd_type_array[qtype]);
501 if (qsd->qsd_ns != NULL) {
505 /* free per-quota type data */
506 for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++)
507 qsd_qtype_fini(env, qsd, qtype);
509 /* deregister connection to the quota master */
510 qsd->qsd_exp_valid = false;
511 lustre_deregister_lwp_item(&qsd->qsd_exp);
513 /* release per-filesystem information */
514 if (qsd->qsd_fsinfo != NULL) {
515 mutex_lock(&qsd->qsd_fsinfo->qfs_mutex);
516 /* remove from the list of fsinfo */
517 list_del_init(&qsd->qsd_link);
518 mutex_unlock(&qsd->qsd_fsinfo->qfs_mutex);
519 qsd_put_fsinfo(qsd->qsd_fsinfo);
520 qsd->qsd_fsinfo = NULL;
523 /* release quota root directory */
524 if (qsd->qsd_root != NULL) {
525 lu_object_put(env, &qsd->qsd_root->do_lu);
526 qsd->qsd_root = NULL;
529 /* release reference on dt_device */
530 if (qsd->qsd_dev != NULL) {
531 lu_ref_del(&qsd->qsd_dev->dd_lu_dev.ld_reference, "qsd", qsd);
532 lu_device_put(&qsd->qsd_dev->dd_lu_dev);
536 CDEBUG(D_QUOTA, "%s: QSD shutdown completed\n", qsd->qsd_svname);
540 EXPORT_SYMBOL(qsd_fini);
543 * Create a new qsd_instance to be associated with backend osd device
544 * identified by \dev.
546 * \param env - the environment passed by the caller
547 * \param svname - is the service name of the OSD device creating this instance
548 * \param dev - is the dt_device where to store quota index files
549 * \param osd_proc - is the procfs parent directory where to create procfs file
550 * related to this new qsd instance
552 * \retval - pointer to new qsd_instance associated with dev \dev on success,
553 * appropriate error on failure
555 struct qsd_instance *qsd_init(const struct lu_env *env, char *svname,
556 struct dt_device *dev,
557 struct proc_dir_entry *osd_proc)
559 struct qsd_thread_info *qti = qsd_info(env);
560 struct qsd_instance *qsd;
564 /* only configure qsd for MDT & OST */
565 type = server_name2index(svname, &idx, NULL);
566 if (type != LDD_F_SV_TYPE_MDT && type != LDD_F_SV_TYPE_OST)
569 /* allocate qsd instance */
572 RETURN(ERR_PTR(-ENOMEM));
574 /* generic initializations */
575 rwlock_init(&qsd->qsd_lock);
576 INIT_LIST_HEAD(&qsd->qsd_link);
577 thread_set_flags(&qsd->qsd_upd_thread, SVC_STOPPED);
578 init_waitqueue_head(&qsd->qsd_upd_thread.t_ctl_waitq);
579 INIT_LIST_HEAD(&qsd->qsd_upd_list);
580 spin_lock_init(&qsd->qsd_adjust_lock);
581 INIT_LIST_HEAD(&qsd->qsd_adjust_list);
582 qsd->qsd_prepared = false;
583 qsd->qsd_started = false;
585 /* copy service name */
586 if (strlcpy(qsd->qsd_svname, svname, sizeof(qsd->qsd_svname))
587 >= sizeof(qsd->qsd_svname))
588 GOTO(out, rc = -E2BIG);
590 /* grab reference on osd device */
591 lu_device_get(&dev->dd_lu_dev);
592 lu_ref_add(&dev->dd_lu_dev.ld_reference, "qsd", qsd);
595 /* we only support pool ID 0 (default data or metadata pool) for the
596 * time being. A different pool ID could be assigned to this target via
597 * the configuration log in the future */
598 qsd->qsd_pool_id = 0;
600 /* get fsname from svname */
601 rc = server_name2fsname(svname, qti->qti_buf, NULL);
603 CERROR("%s: fail to extract filesystem name\n", svname);
607 /* look up quota setting for the filesystem the target belongs to */
608 qsd->qsd_fsinfo = qsd_get_fsinfo(qti->qti_buf, 1);
609 if (qsd->qsd_fsinfo == NULL) {
610 CERROR("%s: failed to locate filesystem information\n", svname);
611 GOTO(out, rc = -EINVAL);
614 /* add in the list of lquota_fsinfo */
615 mutex_lock(&qsd->qsd_fsinfo->qfs_mutex);
616 list_add_tail(&qsd->qsd_link, &qsd->qsd_fsinfo->qfs_qsd_list);
617 mutex_unlock(&qsd->qsd_fsinfo->qfs_mutex);
619 /* register procfs directory */
620 qsd->qsd_proc = lprocfs_register(QSD_DIR, osd_proc,
621 lprocfs_quota_qsd_vars, qsd);
622 if (IS_ERR(qsd->qsd_proc)) {
623 rc = PTR_ERR(qsd->qsd_proc);
624 qsd->qsd_proc = NULL;
625 CERROR("%s: fail to create quota slave proc entry (%d)\n",
637 EXPORT_SYMBOL(qsd_init);
640 * Initialize on-disk structures in order to manage quota enforcement for
641 * the target associated with the qsd instance \qsd and starts the reintegration
642 * procedure for each quota type as soon as possible.
643 * The last step of the reintegration will be completed once qsd_start() is
644 * called, at which points the space reconciliation with the master will be
646 * This function must be called when the server stack is fully configured,
647 * typically when ->ldo_prepare is called across the stack.
649 * \param env - the environment passed by the caller
650 * \param qsd - is qsd_instance to prepare
652 * \retval - 0 on success, appropriate error on failure
654 int qsd_prepare(const struct lu_env *env, struct qsd_instance *qsd)
656 struct qsd_thread_info *qti = qsd_info(env);
660 if (unlikely(qsd == NULL))
663 read_lock(&qsd->qsd_lock);
664 if (qsd->qsd_prepared) {
665 CERROR("%s: qsd instance already prepared\n", qsd->qsd_svname);
668 read_unlock(&qsd->qsd_lock);
672 /* Record whether this qsd instance is managing quota enforcement for a
673 * MDT (i.e. inode quota) or OST (block quota) */
674 if (lu_device_is_md(qsd->qsd_dev->dd_lu_dev.ld_site->ls_top_dev)) {
675 qsd->qsd_is_md = true;
676 qsd->qsd_sync_threshold = LQUOTA_LEAST_QUNIT(LQUOTA_RES_MD);
678 qsd->qsd_sync_threshold = LQUOTA_LEAST_QUNIT(LQUOTA_RES_DT);
681 /* look-up on-disk directory for the quota slave */
682 qsd->qsd_root = lquota_disk_dir_find_create(env, qsd->qsd_dev, NULL,
684 if (IS_ERR(qsd->qsd_root)) {
685 rc = PTR_ERR(qsd->qsd_root);
686 qsd->qsd_root = NULL;
687 CERROR("%s: failed to create quota slave root dir (%d)\n",
688 qsd->qsd_svname, rc);
692 /* initialize per-quota type data */
693 for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++) {
694 rc = qsd_qtype_init(env, qsd, qtype);
699 /* pools successfully setup, mark the qsd as prepared */
700 write_lock(&qsd->qsd_lock);
701 qsd->qsd_prepared = true;
702 write_unlock(&qsd->qsd_lock);
704 /* start reintegration thread for each type, if required */
705 for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++) {
706 struct qsd_qtype_info *qqi = qsd->qsd_type_array[qtype];
708 if (qsd_type_enabled(qsd, qtype) && qsd->qsd_acct_failed) {
709 LCONSOLE_ERROR("%s: can't enable quota enforcement "
710 "since space accounting isn't functional"
711 ". Please run tunefs.lustre --quota on "
712 "an unmounted filesystem if not done "
713 "already\n", qsd->qsd_svname);
717 rc = qsd_start_reint_thread(qqi);
719 CERROR("%s: failed to start reint thread for type %s "
720 "(%d)\n", qsd->qsd_svname, QTYPE_NAME(qtype),
726 /* start writeback thread */
727 rc = qsd_start_upd_thread(qsd);
729 CERROR("%s: failed to start writeback thread (%d)\n",
730 qsd->qsd_svname, rc);
734 /* generate osp name */
735 rc = tgt_name2lwp_name(qsd->qsd_svname, qti->qti_buf,
738 CERROR("%s: failed to generate ospname (%d)\n",
739 qsd->qsd_svname, rc);
743 /* the connection callback will start the reintegration
744 * procedure if quota is enabled */
745 rc = lustre_register_lwp_item(qti->qti_buf, &qsd->qsd_exp,
746 qsd_conn_callback, (void *)qsd);
748 CERROR("%s: fail to get connection to master (%d)\n",
749 qsd->qsd_svname, rc);
755 EXPORT_SYMBOL(qsd_prepare);
758 * Start a qsd instance. This will complete the last step of the reintegration
759 * procedure as soon as possible (provided that the master is reachable).
760 * This should be called when recovery has been completed and quota should now
761 * be enforced on every operations.
763 * \param env - the environment passed by the caller
764 * \param qsd - is the qsd instance associated with the osd device to start
766 int qsd_start(const struct lu_env *env, struct qsd_instance *qsd)
771 if (unlikely(qsd == NULL))
774 write_lock(&qsd->qsd_lock);
775 if (!qsd->qsd_prepared) {
776 CERROR("%s: can't start qsd instance since it wasn't properly "
777 "initialized\n", qsd->qsd_svname);
779 } else if (qsd->qsd_started) {
780 CERROR("%s: qsd instance already started\n", qsd->qsd_svname);
783 /* notify that the qsd_instance is now started */
784 qsd->qsd_started = true;
786 write_unlock(&qsd->qsd_lock);
791 /* Trigger the 3rd step of reintegration: If usage > granted, acquire
792 * up to usage; If usage < granted, release down to usage. */
793 for (type = USRQUOTA; type < MAXQUOTAS; type++) {
794 struct qsd_qtype_info *qqi = qsd->qsd_type_array[type];
795 wake_up(&qqi->qqi_reint_thread.t_ctl_waitq);
800 EXPORT_SYMBOL(qsd_start);
802 void lustre_register_quota_process_config(int (*qpc)(struct lustre_cfg *lcfg));
805 * Global initialization performed at module load time
807 int qsd_glb_init(void)
811 rc = lu_kmem_init(qsd_caches);
815 qsd_key_init_generic(&qsd_thread_key, NULL);
816 lu_context_key_register(&qsd_thread_key);
817 lustre_register_quota_process_config(qsd_process_config);
823 * Companion of qsd_glb_init() called at module unload time
825 void qsd_glb_fini(void)
827 lustre_register_quota_process_config(NULL);
828 lu_kmem_fini(qsd_caches);
829 lu_context_key_degister(&qsd_thread_key);