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, 2017, 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 (qsd_type_enabled(qsd, PRJQUOTA))
89 strncat(enabled, "p", 1);
90 if (strlen(enabled) == 0)
91 strcat(enabled, "none");
93 seq_printf(m, "target name: %s\n"
97 "conn to master: %s\n",
98 qsd->qsd_svname, qsd->qsd_pool_id,
99 qsd->qsd_is_md ? "md" : "dt", enabled,
100 qsd->qsd_exp_valid ? "setup" : "not setup yet");
102 if (qsd->qsd_prepared) {
103 memset(enabled, 0, sizeof(enabled));
104 if (qsd->qsd_type_array[USRQUOTA]->qqi_acct_obj != NULL)
105 strcat(enabled, "u");
106 if (qsd->qsd_type_array[GRPQUOTA]->qqi_acct_obj != NULL)
107 strcat(enabled, "g");
108 if (qsd->qsd_type_array[PRJQUOTA]->qqi_acct_obj != NULL)
109 strncat(enabled, "p", 1);
110 if (strlen(enabled) == 0)
111 strcat(enabled, "none");
112 seq_printf(m, "space acct: %s\n"
113 "user uptodate: glb[%d],slv[%d],reint[%d]\n"
114 "group uptodate: glb[%d],slv[%d],reint[%d]\n"
115 "project uptodate: glb[%d],slv[%d],reint[%d]\n",
117 qsd->qsd_type_array[USRQUOTA]->qqi_glb_uptodate,
118 qsd->qsd_type_array[USRQUOTA]->qqi_slv_uptodate,
119 qsd->qsd_type_array[USRQUOTA]->qqi_reint,
120 qsd->qsd_type_array[GRPQUOTA]->qqi_glb_uptodate,
121 qsd->qsd_type_array[GRPQUOTA]->qqi_slv_uptodate,
122 qsd->qsd_type_array[GRPQUOTA]->qqi_reint,
123 qsd->qsd_type_array[PRJQUOTA]->qqi_glb_uptodate,
124 qsd->qsd_type_array[PRJQUOTA]->qqi_slv_uptodate,
125 qsd->qsd_type_array[PRJQUOTA]->qqi_reint);
129 LPROC_SEQ_FOPS_RO(qsd_state);
131 static int qsd_enabled_seq_show(struct seq_file *m, void *data)
133 struct qsd_instance *qsd = m->private;
136 LASSERT(qsd != NULL);
138 memset(enabled, 0, sizeof(enabled));
139 if (qsd_type_enabled(qsd, USRQUOTA))
140 strcat(enabled, "u");
141 if (qsd_type_enabled(qsd, GRPQUOTA))
142 strcat(enabled, "g");
143 if (qsd_type_enabled(qsd, PRJQUOTA))
144 strncat(enabled, "p", 1);
145 if (strlen(enabled) == 0)
146 strcat(enabled, "none");
148 seq_printf(m, "%s\n", enabled);
152 static ssize_t qsd_enabled_seq_write(struct file *file,
153 const char __user *buffer,
154 size_t count, loff_t *off)
156 struct seq_file *m = file->private_data;
157 struct qsd_instance *qsd = m->private;
158 char fsname[LUSTRE_MAXFSNAME];
166 if (copy_from_user(valstr, buffer, count))
167 GOTO(out, count = -EFAULT);
169 if (strchr(valstr, 'u'))
170 enabled |= BIT(USRQUOTA);
171 if (strchr(valstr, 'g'))
172 enabled |= BIT(GRPQUOTA);
173 if (strchr(valstr, 'p'))
174 enabled |= BIT(PRJQUOTA);
176 if (enabled == 0 && strcmp(valstr, "none"))
177 GOTO(out, count = -EINVAL);
180 pool = LQUOTA_RES_MD;
182 pool = LQUOTA_RES_DT;
184 if (server_name2fsname(qsd->qsd_svname, fsname, NULL))
185 GOTO(out, count = -EINVAL);
187 rc = qsd_config(valstr, fsname, pool);
193 LPROC_SEQ_FOPS(qsd_enabled);
195 /* force reintegration procedure to be executed.
196 * Used for test/debugging purpose */
198 lprocfs_force_reint_seq_write(struct file *file, const char __user *buffer,
199 size_t count, loff_t *off)
201 struct qsd_instance *qsd = ((struct seq_file *)file->private_data)->private;
204 LASSERT(qsd != NULL);
206 write_lock(&qsd->qsd_lock);
207 if (qsd->qsd_stopping) {
208 /* don't mess up with shutdown procedure, it is already
209 * complicated enough */
211 } else if (!qsd->qsd_prepared) {
214 /* mark all indexes as stale */
215 for (qtype = USRQUOTA; qtype < LL_MAXQUOTAS; qtype++) {
216 qsd->qsd_type_array[qtype]->qqi_glb_uptodate = false;
217 qsd->qsd_type_array[qtype]->qqi_slv_uptodate = false;
220 write_unlock(&qsd->qsd_lock);
225 /* kick off reintegration */
226 for (qtype = USRQUOTA; qtype < LL_MAXQUOTAS; qtype++) {
227 rc = qsd_start_reint_thread(qsd->qsd_type_array[qtype]);
231 return rc == 0 ? count : rc;
233 LPROC_SEQ_FOPS_WR_ONLY(qsd, force_reint);
235 static int qsd_timeout_seq_show(struct seq_file *m, void *data)
237 struct qsd_instance *qsd = m->private;
238 LASSERT(qsd != NULL);
240 seq_printf(m, "%d\n", qsd_wait_timeout(qsd));
245 qsd_timeout_seq_write(struct file *file, const char __user *buffer,
246 size_t count, loff_t *off)
248 struct qsd_instance *qsd = ((struct seq_file *)file->private_data)->private;
251 LASSERT(qsd != NULL);
253 rc = lprocfs_str_to_s64(buffer, count, &timeout);
256 if (timeout < 0 || timeout > INT_MAX)
259 qsd->qsd_timeout = timeout;
262 LPROC_SEQ_FOPS(qsd_timeout);
264 static struct lprocfs_vars lprocfs_quota_qsd_vars[] = {
266 .fops = &qsd_state_fops },
268 .fops = &qsd_enabled_fops },
269 { .name = "force_reint",
270 .fops = &qsd_force_reint_fops },
272 .fops = &qsd_timeout_fops },
277 * Callback function invoked by the OSP layer when the connection to the master
280 * \param data - is a pointer to the qsd_instance
282 * \retval - 0 on success, appropriate error on failure
284 static int qsd_conn_callback(void *data)
286 struct qsd_instance *qsd = (struct qsd_instance *)data;
290 /* qsd_exp should now be valid */
291 LASSERT(qsd->qsd_exp);
293 qsd->qsd_ns = class_exp2obd(qsd->qsd_exp)->obd_namespace;
295 write_lock(&qsd->qsd_lock);
296 /* notify that qsd_exp is now valid */
297 qsd->qsd_exp_valid = true;
298 write_unlock(&qsd->qsd_lock);
300 /* Now that the connection to master is setup, we can initiate the
301 * reintegration procedure for quota types which are enabled.
302 * It is worth noting that, if the qsd_instance hasn't been started
303 * already, then we can only complete the first two steps of the
304 * reintegration procedure (i.e. global lock enqueue and slave
305 * index transfer) since the space usage reconciliation (i.e.
306 * step 3) will have to wait for qsd_start() to be called */
307 for (type = USRQUOTA; type < LL_MAXQUOTAS; type++) {
308 struct qsd_qtype_info *qqi = qsd->qsd_type_array[type];
309 wake_up(&qqi->qqi_reint_thread.t_ctl_waitq);
316 * Release qsd_qtype_info structure which contains data associated with a
317 * given quota type. This releases the accounting objects.
318 * It's called on OSD cleanup when the qsd instance is released.
320 * \param env - is the environment passed by the caller
321 * \param qsd - is the qsd instance managing the qsd_qtype_info structure
323 * \param qtype - is the quota type to be shutdown
325 static void qsd_qtype_fini(const struct lu_env *env, struct qsd_instance *qsd,
328 struct qsd_qtype_info *qqi;
332 if (qsd->qsd_type_array[qtype] == NULL)
334 qqi = qsd->qsd_type_array[qtype];
335 qsd->qsd_type_array[qtype] = NULL;
337 /* all deferred work lists should be empty */
338 LASSERT(list_empty(&qqi->qqi_deferred_glb));
339 LASSERT(list_empty(&qqi->qqi_deferred_slv));
341 /* shutdown lquota site */
342 if (qqi->qqi_site != NULL && !IS_ERR(qqi->qqi_site)) {
343 lquota_site_free(env, qqi->qqi_site);
344 qqi->qqi_site = NULL;
347 /* The qqi may still be holding by global locks which are being
348 * canceled asynchronously (LU-4365), see the following steps:
350 * - On server umount, we try to clear all quota locks first by
351 * disconnecting LWP (which will invalidate import and cleanup
352 * all locks on it), however, if quota reint process is holding
353 * the global lock for reintegration at that time, global lock
354 * will fail to be cleared on LWP disconnection.
356 * - Umount process goes on and stops reint process, the global
357 * lock will be dropped on reint process exit, however, the lock
358 * cancel in done in asynchronous way, so the
359 * qsd_glb_blocking_ast() might haven't been called yet when we
362 while (atomic_read(&qqi->qqi_ref) > 1) {
363 CDEBUG(D_QUOTA, "qqi reference count %u, repeat: %d\n",
364 atomic_read(&qqi->qqi_ref), repeat);
366 set_current_state(TASK_INTERRUPTIBLE);
367 schedule_timeout(cfs_time_seconds(1));
370 /* by now, all qqi users should have gone away */
371 LASSERT(atomic_read(&qqi->qqi_ref) == 1);
372 lu_ref_fini(&qqi->qqi_reference);
374 /* release accounting object */
375 if (qqi->qqi_acct_obj != NULL && !IS_ERR(qqi->qqi_acct_obj)) {
376 dt_object_put(env, qqi->qqi_acct_obj);
377 qqi->qqi_acct_obj = NULL;
380 /* release slv index */
381 if (qqi->qqi_slv_obj != NULL && !IS_ERR(qqi->qqi_slv_obj)) {
382 dt_object_put(env, qqi->qqi_slv_obj);
383 qqi->qqi_slv_obj = NULL;
384 qqi->qqi_slv_ver = 0;
387 /* release global index */
388 if (qqi->qqi_glb_obj != NULL && !IS_ERR(qqi->qqi_glb_obj)) {
389 dt_object_put(env, qqi->qqi_glb_obj);
390 qqi->qqi_glb_obj = NULL;
391 qqi->qqi_glb_ver = 0;
398 static const char *qtype2acct_name(int qtype)
400 static char unknown[24];
408 return "acct_project";
411 snprintf(unknown, sizeof(unknown), "acct_unknown_%u", qtype);
415 static const char *qtype2glb_name(int qtype)
417 static char unknown[24];
423 return "limit_group";
425 return "limit_project";
428 snprintf(unknown, sizeof(unknown), "acct_unknown_%u", qtype);
433 * Allocate and initialize a qsd_qtype_info structure for quota type \qtype.
434 * This opens the accounting object and initializes the proc file.
435 * It's called on OSD start when the qsd_prepare() is invoked on the qsd
438 * \param env - the environment passed by the caller
439 * \param qsd - is the qsd instance which will be in charge of the new
440 * qsd_qtype_info instance.
441 * \param qtype - is quota type to set up
443 * \retval - 0 on success and qsd->qsd_type_array[qtype] is allocated,
444 * appropriate error on failure
446 static int qsd_qtype_init(const struct lu_env *env, struct qsd_instance *qsd,
449 struct qsd_qtype_info *qqi;
451 struct obd_uuid uuid;
454 LASSERT(qsd->qsd_type_array[qtype] == NULL);
456 /* allocate structure for this quota type */
460 qsd->qsd_type_array[qtype] = qqi;
461 atomic_set(&qqi->qqi_ref, 1); /* referenced from qsd */
463 /* set backpointer and other parameters */
465 qqi->qqi_qtype = qtype;
466 lu_ref_init(&qqi->qqi_reference);
467 qqi->qqi_glb_uptodate = false;
468 qqi->qqi_slv_uptodate = false;
469 qqi->qqi_reint = false;
470 init_waitqueue_head(&qqi->qqi_reint_thread.t_ctl_waitq);
471 thread_set_flags(&qqi->qqi_reint_thread, SVC_STOPPED);
472 INIT_LIST_HEAD(&qqi->qqi_deferred_glb);
473 INIT_LIST_HEAD(&qqi->qqi_deferred_slv);
474 lquota_generate_fid(&qqi->qqi_fid, qsd->qsd_pool_id,
475 QSD_RES_TYPE(qsd), qtype);
477 /* open accounting object */
478 LASSERT(qqi->qqi_acct_obj == NULL);
479 qqi->qqi_acct_obj = acct_obj_lookup(env, qsd->qsd_dev, qtype);
480 if (IS_ERR(qqi->qqi_acct_obj)) {
481 CDEBUG(D_QUOTA, "%s: no %s space accounting support: rc = %ld\n",
482 qsd->qsd_svname, qtype_name(qtype),
483 PTR_ERR(qqi->qqi_acct_obj));
484 qqi->qqi_acct_obj = NULL;
485 qqi->qqi_acct_failed = true;
488 /* open global index copy */
489 LASSERT(qqi->qqi_glb_obj == NULL);
490 qqi->qqi_glb_obj = lquota_disk_glb_find_create(env, qsd->qsd_dev,
492 &qqi->qqi_fid, true);
493 if (IS_ERR(qqi->qqi_glb_obj)) {
494 CERROR("%s: can't open global index copy "DFID" %ld\n",
495 qsd->qsd_svname, PFID(&qqi->qqi_fid),
496 PTR_ERR(qqi->qqi_glb_obj));
497 GOTO(out, rc = PTR_ERR(qqi->qqi_glb_obj));
499 qqi->qqi_glb_ver = dt_version_get(env, qqi->qqi_glb_obj);
501 /* open slave index copy */
502 LASSERT(qqi->qqi_slv_obj == NULL);
503 obd_str2uuid(&uuid, qsd->qsd_svname);
504 qqi->qqi_slv_obj = lquota_disk_slv_find_create(env, qsd->qsd_dev,
506 &qqi->qqi_fid, &uuid,
508 if (IS_ERR(qqi->qqi_slv_obj)) {
509 CERROR("%s: can't open slave index copy "DFID" %ld\n",
510 qsd->qsd_svname, PFID(&qqi->qqi_fid),
511 PTR_ERR(qqi->qqi_slv_obj));
512 GOTO(out, rc = PTR_ERR(qqi->qqi_slv_obj));
514 qqi->qqi_slv_ver = dt_version_get(env, qqi->qqi_slv_obj);
517 qqi->qqi_site = lquota_site_alloc(env, qqi, false, qtype, &qsd_lqe_ops);
518 if (IS_ERR(qqi->qqi_site)) {
519 CERROR("%s: can't allocate site "DFID" %ld\n", qsd->qsd_svname,
520 PFID(&qqi->qqi_fid), PTR_ERR(qqi->qqi_site));
521 GOTO(out, rc = PTR_ERR(qqi->qqi_site));
524 /* register proc entry for accounting & global index copy objects */
525 rc = lprocfs_seq_create(qsd->qsd_proc, qtype2acct_name(qtype),
526 0444, &lprocfs_quota_seq_fops,
529 CERROR("%s: can't add procfs entry for accounting file %d\n",
530 qsd->qsd_svname, rc);
534 rc = lprocfs_seq_create(qsd->qsd_proc, qtype2glb_name(qtype),
535 0444, &lprocfs_quota_seq_fops,
538 CERROR("%s: can't add procfs entry for global index copy %d\n",
539 qsd->qsd_svname, rc);
545 qsd_qtype_fini(env, qsd, qtype);
550 * Release a qsd_instance. Companion of qsd_init(). This releases all data
551 * structures associated with the quota slave (on-disk objects, lquota entry
553 * This function should be called when the OSD is shutting down.
555 * \param env - is the environment passed by the caller
556 * \param qsd - is the qsd instance to shutdown
558 void qsd_fini(const struct lu_env *env, struct qsd_instance *qsd)
563 if (unlikely(qsd == NULL))
566 CDEBUG(D_QUOTA, "%s: initiating QSD shutdown\n", qsd->qsd_svname);
567 write_lock(&qsd->qsd_lock);
568 qsd->qsd_stopping = true;
569 write_unlock(&qsd->qsd_lock);
571 /* remove qsd proc entry */
572 if (qsd->qsd_proc != NULL) {
573 lprocfs_remove(&qsd->qsd_proc);
574 qsd->qsd_proc = NULL;
577 /* stop the writeback thread */
578 qsd_stop_upd_thread(qsd);
580 /* shutdown the reintegration threads */
581 for (qtype = USRQUOTA; qtype < LL_MAXQUOTAS; qtype++) {
582 if (qsd->qsd_type_array[qtype] == NULL)
584 qsd_stop_reint_thread(qsd->qsd_type_array[qtype]);
587 if (qsd->qsd_ns != NULL) {
591 /* free per-quota type data */
592 for (qtype = USRQUOTA; qtype < LL_MAXQUOTAS; qtype++)
593 qsd_qtype_fini(env, qsd, qtype);
595 /* deregister connection to the quota master */
596 qsd->qsd_exp_valid = false;
597 lustre_deregister_lwp_item(&qsd->qsd_exp);
599 /* release per-filesystem information */
600 if (qsd->qsd_fsinfo != NULL) {
601 mutex_lock(&qsd->qsd_fsinfo->qfs_mutex);
602 /* remove from the list of fsinfo */
603 list_del_init(&qsd->qsd_link);
604 mutex_unlock(&qsd->qsd_fsinfo->qfs_mutex);
605 qsd_put_fsinfo(qsd->qsd_fsinfo);
606 qsd->qsd_fsinfo = NULL;
609 /* release quota root directory */
610 if (qsd->qsd_root != NULL) {
611 dt_object_put(env, qsd->qsd_root);
612 qsd->qsd_root = NULL;
615 /* release reference on dt_device */
616 if (qsd->qsd_dev != NULL) {
617 lu_ref_del(&qsd->qsd_dev->dd_lu_dev.ld_reference, "qsd", qsd);
618 lu_device_put(&qsd->qsd_dev->dd_lu_dev);
622 CDEBUG(D_QUOTA, "%s: QSD shutdown completed\n", qsd->qsd_svname);
626 EXPORT_SYMBOL(qsd_fini);
629 * Create a new qsd_instance to be associated with backend osd device
630 * identified by \dev.
632 * \param env - the environment passed by the caller
633 * \param svname - is the service name of the OSD device creating this instance
634 * \param dev - is the dt_device where to store quota index files
635 * \param osd_proc - is the procfs parent directory where to create procfs file
636 * related to this new qsd instance
638 * \retval - pointer to new qsd_instance associated with dev \dev on success,
639 * appropriate error on failure
641 struct qsd_instance *qsd_init(const struct lu_env *env, char *svname,
642 struct dt_device *dev,
643 struct proc_dir_entry *osd_proc)
645 struct qsd_thread_info *qti = qsd_info(env);
646 struct qsd_instance *qsd;
650 /* only configure qsd for MDT & OST */
651 type = server_name2index(svname, &idx, NULL);
652 if (type != LDD_F_SV_TYPE_MDT && type != LDD_F_SV_TYPE_OST)
655 /* allocate qsd instance */
658 RETURN(ERR_PTR(-ENOMEM));
660 /* generic initializations */
661 rwlock_init(&qsd->qsd_lock);
662 INIT_LIST_HEAD(&qsd->qsd_link);
663 thread_set_flags(&qsd->qsd_upd_thread, SVC_STOPPED);
664 init_waitqueue_head(&qsd->qsd_upd_thread.t_ctl_waitq);
665 INIT_LIST_HEAD(&qsd->qsd_upd_list);
666 spin_lock_init(&qsd->qsd_adjust_lock);
667 INIT_LIST_HEAD(&qsd->qsd_adjust_list);
668 qsd->qsd_prepared = false;
669 qsd->qsd_started = false;
671 /* copy service name */
672 if (strlcpy(qsd->qsd_svname, svname, sizeof(qsd->qsd_svname))
673 >= sizeof(qsd->qsd_svname))
674 GOTO(out, rc = -E2BIG);
676 /* grab reference on osd device */
677 lu_device_get(&dev->dd_lu_dev);
678 lu_ref_add(&dev->dd_lu_dev.ld_reference, "qsd", qsd);
681 /* we only support pool ID 0 (default data or metadata pool) for the
682 * time being. A different pool ID could be assigned to this target via
683 * the configuration log in the future */
684 qsd->qsd_pool_id = 0;
686 /* get fsname from svname */
687 rc = server_name2fsname(svname, qti->qti_buf, NULL);
689 CERROR("%s: fail to extract filesystem name\n", svname);
693 /* look up quota setting for the filesystem the target belongs to */
694 qsd->qsd_fsinfo = qsd_get_fsinfo(qti->qti_buf, 1);
695 if (qsd->qsd_fsinfo == NULL) {
696 CERROR("%s: failed to locate filesystem information\n", svname);
697 GOTO(out, rc = -EINVAL);
700 /* add in the list of lquota_fsinfo */
701 mutex_lock(&qsd->qsd_fsinfo->qfs_mutex);
702 list_add_tail(&qsd->qsd_link, &qsd->qsd_fsinfo->qfs_qsd_list);
703 mutex_unlock(&qsd->qsd_fsinfo->qfs_mutex);
705 /* register procfs directory */
706 qsd->qsd_proc = lprocfs_register(QSD_DIR, osd_proc,
707 lprocfs_quota_qsd_vars, qsd);
708 if (IS_ERR(qsd->qsd_proc)) {
709 rc = PTR_ERR(qsd->qsd_proc);
710 qsd->qsd_proc = NULL;
711 CERROR("%s: fail to create quota slave proc entry (%d)\n",
723 EXPORT_SYMBOL(qsd_init);
726 * Initialize on-disk structures in order to manage quota enforcement for
727 * the target associated with the qsd instance \qsd and starts the reintegration
728 * procedure for each quota type as soon as possible.
729 * The last step of the reintegration will be completed once qsd_start() is
730 * called, at which points the space reconciliation with the master will be
732 * This function must be called when the server stack is fully configured,
733 * typically when ->ldo_prepare is called across the stack.
735 * \param env - the environment passed by the caller
736 * \param qsd - is qsd_instance to prepare
738 * \retval - 0 on success, appropriate error on failure
740 int qsd_prepare(const struct lu_env *env, struct qsd_instance *qsd)
742 struct qsd_thread_info *qti = qsd_info(env);
746 if (unlikely(qsd == NULL))
749 read_lock(&qsd->qsd_lock);
750 if (qsd->qsd_prepared) {
751 CERROR("%s: qsd instance already prepared\n", qsd->qsd_svname);
754 read_unlock(&qsd->qsd_lock);
758 /* Record whether this qsd instance is managing quota enforcement for a
759 * MDT (i.e. inode quota) or OST (block quota) */
760 if (lu_device_is_md(qsd->qsd_dev->dd_lu_dev.ld_site->ls_top_dev)) {
761 qsd->qsd_is_md = true;
762 qsd->qsd_sync_threshold = LQUOTA_LEAST_QUNIT(LQUOTA_RES_MD);
764 qsd->qsd_sync_threshold = LQUOTA_LEAST_QUNIT(LQUOTA_RES_DT);
767 /* look-up on-disk directory for the quota slave */
768 qsd->qsd_root = lquota_disk_dir_find_create(env, qsd->qsd_dev, NULL,
770 if (IS_ERR(qsd->qsd_root)) {
771 rc = PTR_ERR(qsd->qsd_root);
772 qsd->qsd_root = NULL;
773 CERROR("%s: failed to create quota slave root dir (%d)\n",
774 qsd->qsd_svname, rc);
778 /* initialize per-quota type data */
779 for (qtype = USRQUOTA; qtype < LL_MAXQUOTAS; qtype++) {
780 rc = qsd_qtype_init(env, qsd, qtype);
785 /* pools successfully setup, mark the qsd as prepared */
786 write_lock(&qsd->qsd_lock);
787 qsd->qsd_prepared = true;
788 write_unlock(&qsd->qsd_lock);
790 if (qsd->qsd_dev->dd_rdonly)
793 /* start reintegration thread for each type, if required */
794 for (qtype = USRQUOTA; qtype < LL_MAXQUOTAS; qtype++) {
795 struct qsd_qtype_info *qqi = qsd->qsd_type_array[qtype];
797 if (qsd_type_enabled(qsd, qtype) &&
798 qqi->qqi_acct_failed) {
799 LCONSOLE_ERROR("%s: can't enable quota enforcement "
800 "since space accounting isn't functional"
801 ". Please run tunefs.lustre --quota on "
802 "an unmounted filesystem if not done "
803 "already\n", qsd->qsd_svname);
807 rc = qsd_start_reint_thread(qqi);
809 CERROR("%s: failed to start reint thread for type %s: rc = %d\n",
810 qsd->qsd_svname, qtype_name(qtype), rc);
815 /* start writeback thread */
816 rc = qsd_start_upd_thread(qsd);
818 CERROR("%s: failed to start writeback thread (%d)\n",
819 qsd->qsd_svname, rc);
823 /* generate osp name */
824 rc = tgt_name2lwp_name(qsd->qsd_svname, qti->qti_buf,
827 CERROR("%s: failed to generate ospname (%d)\n",
828 qsd->qsd_svname, rc);
832 /* the connection callback will start the reintegration
833 * procedure if quota is enabled */
834 rc = lustre_register_lwp_item(qti->qti_buf, &qsd->qsd_exp,
835 qsd_conn_callback, (void *)qsd);
837 CERROR("%s: fail to get connection to master (%d)\n",
838 qsd->qsd_svname, rc);
844 EXPORT_SYMBOL(qsd_prepare);
847 * Start a qsd instance. This will complete the last step of the reintegration
848 * procedure as soon as possible (provided that the master is reachable).
849 * This should be called when recovery has been completed and quota should now
850 * be enforced on every operations.
852 * \param env - the environment passed by the caller
853 * \param qsd - is the qsd instance associated with the osd device to start
855 int qsd_start(const struct lu_env *env, struct qsd_instance *qsd)
860 if (unlikely(qsd == NULL))
863 write_lock(&qsd->qsd_lock);
864 if (!qsd->qsd_prepared) {
865 CERROR("%s: can't start qsd instance since it wasn't properly "
866 "initialized\n", qsd->qsd_svname);
868 } else if (qsd->qsd_started) {
869 CERROR("%s: qsd instance already started\n", qsd->qsd_svname);
872 /* notify that the qsd_instance is now started */
873 qsd->qsd_started = true;
875 write_unlock(&qsd->qsd_lock);
880 /* Trigger the 3rd step of reintegration: If usage > granted, acquire
881 * up to usage; If usage < granted, release down to usage. */
882 for (type = USRQUOTA; type < LL_MAXQUOTAS; type++) {
883 struct qsd_qtype_info *qqi = qsd->qsd_type_array[type];
884 wake_up(&qqi->qqi_reint_thread.t_ctl_waitq);
889 EXPORT_SYMBOL(qsd_start);
891 void lustre_register_quota_process_config(int (*qpc)(struct lustre_cfg *lcfg));
894 * Global initialization performed at module load time
896 int qsd_glb_init(void)
900 rc = lu_kmem_init(qsd_caches);
904 qsd_key_init_generic(&qsd_thread_key, NULL);
905 lu_context_key_register(&qsd_thread_key);
906 lustre_register_quota_process_config(qsd_process_config);
912 * Companion of qsd_glb_init() called at module unload time
914 void qsd_glb_fini(void)
916 lustre_register_quota_process_config(NULL);
917 lu_kmem_fini(qsd_caches);
918 lu_context_key_degister(&qsd_thread_key);