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 lprocfs_qsd_rd_state(char *page, char **start, off_t off,
77 int count, int *eof, void *data)
79 struct qsd_instance *qsd = (struct qsd_instance *)data;
85 memset(enabled, 0, sizeof(enabled));
86 if (qsd_type_enabled(qsd, USRQUOTA))
88 if (qsd_type_enabled(qsd, GRPQUOTA))
90 if (strlen(enabled) == 0)
91 strcat(enabled, "none");
93 rc = snprintf(page, count,
98 "conn to master: %s\n",
99 qsd->qsd_svname, qsd->qsd_pool_id,
100 qsd->qsd_is_md ? "md" : "dt", enabled,
101 qsd->qsd_exp_valid ? "setup" : "not setup yet");
103 if (qsd->qsd_prepared) {
104 memset(enabled, 0, sizeof(enabled));
105 if (qsd->qsd_type_array[USRQUOTA]->qqi_acct_obj != NULL)
106 strcat(enabled, "u");
107 if (qsd->qsd_type_array[GRPQUOTA]->qqi_acct_obj != NULL)
108 strcat(enabled, "g");
109 if (strlen(enabled) == 0)
110 strcat(enabled, "none");
111 rc += snprintf(page + rc, count - rc,
113 "user uptodate: glb[%d],slv[%d],reint[%d]\n"
114 "group uptodate: glb[%d],slv[%d],reint[%d]\n",
116 qsd->qsd_type_array[USRQUOTA]->qqi_glb_uptodate,
117 qsd->qsd_type_array[USRQUOTA]->qqi_slv_uptodate,
118 qsd->qsd_type_array[USRQUOTA]->qqi_reint,
119 qsd->qsd_type_array[GRPQUOTA]->qqi_glb_uptodate,
120 qsd->qsd_type_array[GRPQUOTA]->qqi_slv_uptodate,
121 qsd->qsd_type_array[GRPQUOTA]->qqi_reint);
126 static int lprocfs_qsd_rd_enabled(char *page, char **start, off_t off,
127 int count, int *eof, void *data)
129 struct qsd_instance *qsd = (struct qsd_instance *)data;
132 LASSERT(qsd != NULL);
134 memset(enabled, 0, sizeof(enabled));
135 if (qsd_type_enabled(qsd, USRQUOTA))
136 strcat(enabled, "u");
137 if (qsd_type_enabled(qsd, GRPQUOTA))
138 strcat(enabled, "g");
139 if (strlen(enabled) == 0)
140 strcat(enabled, "none");
142 return snprintf(page, count, "%s\n", enabled);
145 /* force reintegration procedure to be executed.
146 * Used for test/debugging purpose */
147 static int lprocfs_qsd_wr_force_reint(struct file *file, const char *buffer,
148 unsigned long count, void *data)
150 struct qsd_instance *qsd = (struct qsd_instance *)data;
153 LASSERT(qsd != NULL);
155 write_lock(&qsd->qsd_lock);
156 if (qsd->qsd_stopping) {
157 /* don't mess up with shutdown procedure, it is already
158 * complicated enough */
160 } else if (!qsd->qsd_prepared) {
163 /* mark all indexes as stale */
164 for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++) {
165 qsd->qsd_type_array[qtype]->qqi_glb_uptodate = false;
166 qsd->qsd_type_array[qtype]->qqi_slv_uptodate = false;
169 write_unlock(&qsd->qsd_lock);
174 /* kick off reintegration */
175 for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++) {
176 rc = qsd_start_reint_thread(qsd->qsd_type_array[qtype]);
180 return rc == 0 ? count : rc;
183 static int lprocfs_qsd_rd_timeout(char *page, char **start, off_t off,
184 int count, int *eof, void *data)
186 struct qsd_instance *qsd = (struct qsd_instance *)data;
187 LASSERT(qsd != NULL);
189 return snprintf(page, count, "%d\n", qsd_wait_timeout(qsd));
192 static int lprocfs_qsd_wr_timeout(struct file *file, const char *buffer,
193 unsigned long count, void *data)
195 struct qsd_instance *qsd = (struct qsd_instance *)data;
197 LASSERT(qsd != NULL);
199 rc = lprocfs_write_helper(buffer, count, &timeout);
205 qsd->qsd_timeout = timeout;
209 static struct lprocfs_vars lprocfs_quota_qsd_vars[] = {
210 { "info", lprocfs_qsd_rd_state, 0, 0},
211 { "enabled", lprocfs_qsd_rd_enabled, 0, 0},
212 { "force_reint", 0, lprocfs_qsd_wr_force_reint, 0},
213 { "timeout", lprocfs_qsd_rd_timeout, lprocfs_qsd_wr_timeout, 0},
218 * Callback function invoked by the OSP layer when the connection to the master
221 * \param data - is a pointer to the qsd_instance
223 * \retval - 0 on success, appropriate error on failure
225 static int qsd_conn_callback(void *data)
227 struct qsd_instance *qsd = (struct qsd_instance *)data;
231 /* qsd_exp should now be valid */
232 LASSERT(qsd->qsd_exp);
234 qsd->qsd_ns = class_exp2obd(qsd->qsd_exp)->obd_namespace;
236 write_lock(&qsd->qsd_lock);
237 /* notify that qsd_exp is now valid */
238 qsd->qsd_exp_valid = true;
239 write_unlock(&qsd->qsd_lock);
241 /* Now that the connection to master is setup, we can initiate the
242 * reintegration procedure for quota types which are enabled.
243 * It is worth noting that, if the qsd_instance hasn't been started
244 * already, then we can only complete the first two steps of the
245 * reintegration procedure (i.e. global lock enqueue and slave
246 * index transfer) since the space usage reconciliation (i.e.
247 * step 3) will have to wait for qsd_start() to be called */
248 for (type = USRQUOTA; type < MAXQUOTAS; type++) {
249 struct qsd_qtype_info *qqi = qsd->qsd_type_array[type];
250 wake_up(&qqi->qqi_reint_thread.t_ctl_waitq);
257 * Release qsd_qtype_info structure which contains data associated with a
258 * given quota type. This releases the accounting objects.
259 * It's called on OSD cleanup when the qsd instance is released.
261 * \param env - is the environment passed by the caller
262 * \param qsd - is the qsd instance managing the qsd_qtype_info structure
264 * \param qtype - is the quota type to be shutdown
266 static void qsd_qtype_fini(const struct lu_env *env, struct qsd_instance *qsd,
269 struct qsd_qtype_info *qqi;
272 if (qsd->qsd_type_array[qtype] == NULL)
274 qqi = qsd->qsd_type_array[qtype];
275 qsd->qsd_type_array[qtype] = NULL;
277 /* all deferred work lists should be empty */
278 LASSERT(cfs_list_empty(&qqi->qqi_deferred_glb));
279 LASSERT(cfs_list_empty(&qqi->qqi_deferred_slv));
281 /* shutdown lquota site */
282 if (qqi->qqi_site != NULL && !IS_ERR(qqi->qqi_site)) {
283 lquota_site_free(env, qqi->qqi_site);
284 qqi->qqi_site = NULL;
287 /* by now, all qqi users should have gone away */
288 LASSERT(cfs_atomic_read(&qqi->qqi_ref) == 1);
289 lu_ref_fini(&qqi->qqi_reference);
291 /* release accounting object */
292 if (qqi->qqi_acct_obj != NULL && !IS_ERR(qqi->qqi_acct_obj)) {
293 lu_object_put(env, &qqi->qqi_acct_obj->do_lu);
294 qqi->qqi_acct_obj = NULL;
297 /* release slv index */
298 if (qqi->qqi_slv_obj != NULL && !IS_ERR(qqi->qqi_slv_obj)) {
299 lu_object_put(env, &qqi->qqi_slv_obj->do_lu);
300 qqi->qqi_slv_obj = NULL;
301 qqi->qqi_slv_ver = 0;
304 /* release global index */
305 if (qqi->qqi_glb_obj != NULL && !IS_ERR(qqi->qqi_glb_obj)) {
306 lu_object_put(env, &qqi->qqi_glb_obj->do_lu);
307 qqi->qqi_glb_obj = NULL;
308 qqi->qqi_glb_ver = 0;
316 * Allocate and initialize a qsd_qtype_info structure for quota type \qtype.
317 * This opens the accounting object and initializes the proc file.
318 * It's called on OSD start when the qsd_prepare() is invoked on the qsd
321 * \param env - the environment passed by the caller
322 * \param qsd - is the qsd instance which will be in charge of the new
323 * qsd_qtype_info instance.
324 * \param qtype - is quota type to set up
326 * \retval - 0 on success and qsd->qsd_type_array[qtype] is allocated,
327 * appropriate error on failure
329 static int qsd_qtype_init(const struct lu_env *env, struct qsd_instance *qsd,
332 struct qsd_qtype_info *qqi;
334 struct obd_uuid uuid;
337 LASSERT(qsd->qsd_type_array[qtype] == NULL);
339 /* allocate structure for this quota type */
343 qsd->qsd_type_array[qtype] = qqi;
344 cfs_atomic_set(&qqi->qqi_ref, 1); /* referenced from qsd */
346 /* set backpointer and other parameters */
348 qqi->qqi_qtype = qtype;
349 lu_ref_init(&qqi->qqi_reference);
350 lquota_generate_fid(&qqi->qqi_fid, qsd->qsd_pool_id, QSD_RES_TYPE(qsd),
352 qqi->qqi_glb_uptodate = false;
353 qqi->qqi_slv_uptodate = false;
354 qqi->qqi_reint = false;
355 init_waitqueue_head(&qqi->qqi_reint_thread.t_ctl_waitq);
356 thread_set_flags(&qqi->qqi_reint_thread, SVC_STOPPED);
357 CFS_INIT_LIST_HEAD(&qqi->qqi_deferred_glb);
358 CFS_INIT_LIST_HEAD(&qqi->qqi_deferred_slv);
360 /* open accounting object */
361 LASSERT(qqi->qqi_acct_obj == NULL);
362 qqi->qqi_acct_obj = acct_obj_lookup(env, qsd->qsd_dev, qtype);
363 if (IS_ERR(qqi->qqi_acct_obj)) {
364 CDEBUG(D_QUOTA, "%s: no %s space accounting support rc:%ld\n",
365 qsd->qsd_svname, QTYPE_NAME(qtype),
366 PTR_ERR(qqi->qqi_acct_obj));
367 qqi->qqi_acct_obj = NULL;
368 qsd->qsd_acct_failed = true;
371 /* open global index copy */
372 LASSERT(qqi->qqi_glb_obj == NULL);
373 qqi->qqi_glb_obj = lquota_disk_glb_find_create(env, qsd->qsd_dev,
375 &qqi->qqi_fid, true);
376 if (IS_ERR(qqi->qqi_glb_obj)) {
377 CERROR("%s: can't open global index copy "DFID" %ld\n",
378 qsd->qsd_svname, PFID(&qqi->qqi_fid),
379 PTR_ERR(qqi->qqi_glb_obj));
380 GOTO(out, rc = PTR_ERR(qqi->qqi_glb_obj));
382 qqi->qqi_glb_ver = dt_version_get(env, qqi->qqi_glb_obj);
384 /* open slave index copy */
385 LASSERT(qqi->qqi_slv_obj == NULL);
386 obd_str2uuid(&uuid, qsd->qsd_svname);
387 qqi->qqi_slv_obj = lquota_disk_slv_find_create(env, qsd->qsd_dev,
389 &qqi->qqi_fid, &uuid,
391 if (IS_ERR(qqi->qqi_slv_obj)) {
392 CERROR("%s: can't open slave index copy "DFID" %ld\n",
393 qsd->qsd_svname, PFID(&qqi->qqi_fid),
394 PTR_ERR(qqi->qqi_slv_obj));
395 GOTO(out, rc = PTR_ERR(qqi->qqi_slv_obj));
397 qqi->qqi_slv_ver = dt_version_get(env, qqi->qqi_slv_obj);
400 qqi->qqi_site = lquota_site_alloc(env, qqi, false, qtype, &qsd_lqe_ops);
401 if (IS_ERR(qqi->qqi_site)) {
402 CERROR("%s: can't allocate site "DFID" %ld\n", qsd->qsd_svname,
403 PFID(&qqi->qqi_fid), PTR_ERR(qqi->qqi_site));
404 GOTO(out, rc = PTR_ERR(qqi->qqi_site));
407 /* register proc entry for accounting & global index copy objects */
408 rc = lprocfs_seq_create(qsd->qsd_proc,
409 qtype == USRQUOTA ? "acct_user" : "acct_group",
410 0444, &lprocfs_quota_seq_fops,
413 CERROR("%s: can't add procfs entry for accounting file %d\n",
414 qsd->qsd_svname, rc);
418 rc = lprocfs_seq_create(qsd->qsd_proc,
419 qtype == USRQUOTA ? "limit_user" : "limit_group",
420 0444, &lprocfs_quota_seq_fops,
423 CERROR("%s: can't add procfs entry for global index copy %d\n",
424 qsd->qsd_svname, rc);
430 qsd_qtype_fini(env, qsd, qtype);
435 * Release a qsd_instance. Companion of qsd_init(). This releases all data
436 * structures associated with the quota slave (on-disk objects, lquota entry
438 * This function should be called when the OSD is shutting down.
440 * \param env - is the environment passed by the caller
441 * \param qsd - is the qsd instance to shutdown
443 void qsd_fini(const struct lu_env *env, struct qsd_instance *qsd)
448 if (unlikely(qsd == NULL))
451 CDEBUG(D_QUOTA, "%s: initiating QSD shutdown\n", qsd->qsd_svname);
452 write_lock(&qsd->qsd_lock);
453 qsd->qsd_stopping = true;
454 write_unlock(&qsd->qsd_lock);
456 /* remove qsd proc entry */
457 if (qsd->qsd_proc != NULL) {
458 lprocfs_remove(&qsd->qsd_proc);
459 qsd->qsd_proc = NULL;
462 /* stop the writeback thread */
463 qsd_stop_upd_thread(qsd);
465 /* shutdown the reintegration threads */
466 for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++) {
467 if (qsd->qsd_type_array[qtype] == NULL)
469 qsd_stop_reint_thread(qsd->qsd_type_array[qtype]);
472 if (qsd->qsd_ns != NULL) {
476 /* free per-quota type data */
477 for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++)
478 qsd_qtype_fini(env, qsd, qtype);
480 /* deregister connection to the quota master */
481 qsd->qsd_exp_valid = false;
482 lustre_deregister_lwp_item(&qsd->qsd_exp);
484 /* release per-filesystem information */
485 if (qsd->qsd_fsinfo != NULL) {
486 down(&qsd->qsd_fsinfo->qfs_sem);
487 /* remove from the list of fsinfo */
488 cfs_list_del_init(&qsd->qsd_link);
489 up(&qsd->qsd_fsinfo->qfs_sem);
490 qsd_put_fsinfo(qsd->qsd_fsinfo);
491 qsd->qsd_fsinfo = NULL;
494 /* release quota root directory */
495 if (qsd->qsd_root != NULL) {
496 lu_object_put(env, &qsd->qsd_root->do_lu);
497 qsd->qsd_root = NULL;
500 /* release reference on dt_device */
501 if (qsd->qsd_dev != NULL) {
502 lu_ref_del(&qsd->qsd_dev->dd_lu_dev.ld_reference, "qsd", qsd);
503 lu_device_put(&qsd->qsd_dev->dd_lu_dev);
507 CDEBUG(D_QUOTA, "%s: QSD shutdown completed\n", qsd->qsd_svname);
511 EXPORT_SYMBOL(qsd_fini);
514 * Create a new qsd_instance to be associated with backend osd device
515 * identified by \dev.
517 * \param env - the environment passed by the caller
518 * \param svname - is the service name of the OSD device creating this instance
519 * \param dev - is the dt_device where to store quota index files
520 * \param osd_proc - is the procfs parent directory where to create procfs file
521 * related to this new qsd instance
523 * \retval - pointer to new qsd_instance associated with dev \dev on success,
524 * appropriate error on failure
526 struct qsd_instance *qsd_init(const struct lu_env *env, char *svname,
527 struct dt_device *dev,
528 cfs_proc_dir_entry_t *osd_proc)
530 struct qsd_thread_info *qti = qsd_info(env);
531 struct qsd_instance *qsd;
535 /* only configure qsd for MDT & OST */
536 type = server_name2index(svname, &idx, NULL);
537 if (type != LDD_F_SV_TYPE_MDT && type != LDD_F_SV_TYPE_OST)
540 /* allocate qsd instance */
543 RETURN(ERR_PTR(-ENOMEM));
545 /* generic initializations */
546 rwlock_init(&qsd->qsd_lock);
547 CFS_INIT_LIST_HEAD(&qsd->qsd_link);
548 thread_set_flags(&qsd->qsd_upd_thread, SVC_STOPPED);
549 init_waitqueue_head(&qsd->qsd_upd_thread.t_ctl_waitq);
550 CFS_INIT_LIST_HEAD(&qsd->qsd_upd_list);
551 spin_lock_init(&qsd->qsd_adjust_lock);
552 CFS_INIT_LIST_HEAD(&qsd->qsd_adjust_list);
553 qsd->qsd_prepared = false;
554 qsd->qsd_started = false;
556 /* copy service name */
557 if (strlcpy(qsd->qsd_svname, svname, sizeof(qsd->qsd_svname))
558 >= sizeof(qsd->qsd_svname))
559 GOTO(out, rc = -E2BIG);
561 /* grab reference on osd device */
562 lu_device_get(&dev->dd_lu_dev);
563 lu_ref_add(&dev->dd_lu_dev.ld_reference, "qsd", qsd);
566 /* we only support pool ID 0 (default data or metadata pool) for the
567 * time being. A different pool ID could be assigned to this target via
568 * the configuration log in the future */
569 qsd->qsd_pool_id = 0;
571 /* get fsname from svname */
572 rc = server_name2fsname(svname, qti->qti_buf, NULL);
574 CERROR("%s: fail to extract filesystem name\n", svname);
578 /* look up quota setting for the filesystem the target belongs to */
579 qsd->qsd_fsinfo = qsd_get_fsinfo(qti->qti_buf, 1);
580 if (qsd->qsd_fsinfo == NULL) {
581 CERROR("%s: failed to locate filesystem information\n", svname);
582 GOTO(out, rc = -EINVAL);
585 /* add in the list of lquota_fsinfo */
586 down(&qsd->qsd_fsinfo->qfs_sem);
587 list_add_tail(&qsd->qsd_link, &qsd->qsd_fsinfo->qfs_qsd_list);
588 up(&qsd->qsd_fsinfo->qfs_sem);
590 /* register procfs directory */
591 qsd->qsd_proc = lprocfs_register(QSD_DIR, osd_proc,
592 lprocfs_quota_qsd_vars, qsd);
593 if (IS_ERR(qsd->qsd_proc)) {
594 rc = PTR_ERR(qsd->qsd_proc);
595 qsd->qsd_proc = NULL;
596 CERROR("%s: fail to create quota slave proc entry (%d)\n",
608 EXPORT_SYMBOL(qsd_init);
611 * Initialize on-disk structures in order to manage quota enforcement for
612 * the target associated with the qsd instance \qsd and starts the reintegration
613 * procedure for each quota type as soon as possible.
614 * The last step of the reintegration will be completed once qsd_start() is
615 * called, at which points the space reconciliation with the master will be
617 * This function must be called when the server stack is fully configured,
618 * typically when ->ldo_prepare is called across the stack.
620 * \param env - the environment passed by the caller
621 * \param qsd - is qsd_instance to prepare
623 * \retval - 0 on success, appropriate error on failure
625 int qsd_prepare(const struct lu_env *env, struct qsd_instance *qsd)
627 struct qsd_thread_info *qti = qsd_info(env);
631 if (unlikely(qsd == NULL))
634 read_lock(&qsd->qsd_lock);
635 if (qsd->qsd_prepared) {
636 CERROR("%s: qsd instance already prepared\n", qsd->qsd_svname);
639 read_unlock(&qsd->qsd_lock);
643 /* Record whether this qsd instance is managing quota enforcement for a
644 * MDT (i.e. inode quota) or OST (block quota) */
645 if (lu_device_is_md(qsd->qsd_dev->dd_lu_dev.ld_site->ls_top_dev)) {
646 qsd->qsd_is_md = true;
647 qsd->qsd_sync_threshold = LQUOTA_LEAST_QUNIT(LQUOTA_RES_MD);
649 qsd->qsd_sync_threshold = LQUOTA_LEAST_QUNIT(LQUOTA_RES_DT);
652 /* look-up on-disk directory for the quota slave */
653 qsd->qsd_root = lquota_disk_dir_find_create(env, qsd->qsd_dev, NULL,
655 if (IS_ERR(qsd->qsd_root)) {
656 rc = PTR_ERR(qsd->qsd_root);
657 qsd->qsd_root = NULL;
658 CERROR("%s: failed to create quota slave root dir (%d)\n",
659 qsd->qsd_svname, rc);
663 /* initialize per-quota type data */
664 for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++) {
665 rc = qsd_qtype_init(env, qsd, qtype);
670 /* pools successfully setup, mark the qsd as prepared */
671 write_lock(&qsd->qsd_lock);
672 qsd->qsd_prepared = true;
673 write_unlock(&qsd->qsd_lock);
675 /* start reintegration thread for each type, if required */
676 for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++) {
677 struct qsd_qtype_info *qqi = qsd->qsd_type_array[qtype];
679 if (qsd_type_enabled(qsd, qtype) && qsd->qsd_acct_failed) {
680 LCONSOLE_ERROR("%s: can't enable quota enforcement "
681 "since space accounting isn't functional"
682 ". Please run tunefs.lustre --quota on "
683 "an unmounted filesystem if not done "
684 "already\n", qsd->qsd_svname);
688 rc = qsd_start_reint_thread(qqi);
690 CERROR("%s: failed to start reint thread for type %s "
691 "(%d)\n", qsd->qsd_svname, QTYPE_NAME(qtype),
697 /* start writeback thread */
698 rc = qsd_start_upd_thread(qsd);
700 CERROR("%s: failed to start writeback thread (%d)\n",
701 qsd->qsd_svname, rc);
705 /* generate osp name */
706 rc = tgt_name2lwpname((char *)qsd->qsd_svname, qti->qti_buf);
708 CERROR("%s: failed to generate ospname (%d)\n",
709 qsd->qsd_svname, rc);
713 /* the connection callback will start the reintegration
714 * procedure if quota is enabled */
715 rc = lustre_register_lwp_item(qti->qti_buf, &qsd->qsd_exp,
716 qsd_conn_callback, (void *)qsd);
718 CERROR("%s: fail to get connection to master (%d)\n",
719 qsd->qsd_svname, rc);
725 EXPORT_SYMBOL(qsd_prepare);
728 * Start a qsd instance. This will complete the last step of the reintegration
729 * procedure as soon as possible (provided that the master is reachable).
730 * This should be called when recovery has been completed and quota should now
731 * be enforced on every operations.
733 * \param env - the environment passed by the caller
734 * \param qsd - is the qsd instance associated with the osd device to start
736 int qsd_start(const struct lu_env *env, struct qsd_instance *qsd)
741 if (unlikely(qsd == NULL))
744 write_lock(&qsd->qsd_lock);
745 if (!qsd->qsd_prepared) {
746 CERROR("%s: can't start qsd instance since it wasn't properly "
747 "initialized\n", qsd->qsd_svname);
749 } else if (qsd->qsd_started) {
750 CERROR("%s: qsd instance already started\n", qsd->qsd_svname);
753 /* notify that the qsd_instance is now started */
754 qsd->qsd_started = true;
756 write_unlock(&qsd->qsd_lock);
761 /* Trigger the 3rd step of reintegration: If usage > granted, acquire
762 * up to usage; If usage < granted, release down to usage. */
763 for (type = USRQUOTA; type < MAXQUOTAS; type++) {
764 struct qsd_qtype_info *qqi = qsd->qsd_type_array[type];
765 wake_up(&qqi->qqi_reint_thread.t_ctl_waitq);
770 EXPORT_SYMBOL(qsd_start);
772 void lustre_register_quota_process_config(int (*qpc)(struct lustre_cfg *lcfg));
775 * Global initialization performed at module load time
777 int qsd_glb_init(void)
781 rc = lu_kmem_init(qsd_caches);
785 qsd_key_init_generic(&qsd_thread_key, NULL);
786 lu_context_key_register(&qsd_thread_key);
787 lustre_register_quota_process_config(qsd_process_config);
793 * Companion of qsd_glb_init() called at module unload time
795 void qsd_glb_fini(void)
797 lustre_register_quota_process_config(NULL);
798 lu_kmem_fini(qsd_caches);
799 lu_context_key_degister(&qsd_thread_key);