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 * A Quota Master Target has a list(qmt_pool_list) where it stores qmt_pool_info
33 * structures. There is one such structure for each pool managed by the QMT.
35 * Each pool can have different quota types enforced (typically user & group
36 * quota). A pool is in charge of managing lquota_entry structures for each
37 * quota type. This is done by creating one lquota_entry site per quota
38 * type. A site stores entries in a hash table and read quota settings from disk
39 * when a given ID isn't present in the hash.
41 * The pool API exported here is the following:
42 * - qmt_pool_init(): initializes the general QMT structures used to manage
44 * - qmt_pool_fini(): frees the structures allocated by qmt_pool_fini().
45 * - qmt_pool_prepare(): sets up the on-disk indexes associated with each pool.
46 * - qmt_pool_new_conn(): is used to create a new slave index file.
47 * - qmt_pool_lqe_lookup(): returns an up-to-date lquota entry associated with
51 #define DEBUG_SUBSYSTEM S_LQUOTA
53 #include <obd_class.h>
54 #include <lprocfs_status.h>
55 #include "qmt_internal.h"
57 static inline int qmt_sarr_pool_init(struct qmt_pool_info *qpi);
58 static inline int qmt_sarr_pool_add(struct qmt_pool_info *qpi,
60 static inline int qmt_sarr_pool_rem(struct qmt_pool_info *qpi, int idx);
61 static inline void qmt_sarr_pool_free(struct qmt_pool_info *qpi);
62 static inline int qmt_sarr_check_idx(struct qmt_pool_info *qpi, int idx);
63 static inline void qmt_stop_pool_recalc(struct qmt_pool_info *qpi);
66 * Static helper functions not used outside the scope of this file
69 static inline void qpi_putref_locked(struct qmt_pool_info *pool)
71 LASSERT(atomic_read(&pool->qpi_ref) > 1);
72 atomic_dec(&pool->qpi_ref);
75 /* some procfs helpers */
76 static int qpi_state_seq_show(struct seq_file *m, void *data)
78 struct qmt_pool_info *pool = m->private;
81 LASSERT(pool != NULL);
82 if (unlikely(!test_bit(QPI_FLAG_STATE_INITED, &pool->qpi_flags)))
85 seq_printf(m, "pool:\n"
89 " least qunit: %lu\n",
91 RES_NAME(pool->qpi_rtype),
92 atomic_read(&pool->qpi_ref),
93 pool->qpi_least_qunit);
95 for (type = 0; type < LL_MAXQUOTAS; type++)
96 seq_printf(m, " %s:\n"
100 qpi_slv_nr(pool, type),
101 atomic_read(&pool->qpi_site[type]->lqs_hash->hs_count));
105 LPROC_SEQ_FOPS_RO(qpi_state);
107 static int qpi_soft_least_qunit_seq_show(struct seq_file *m, void *data)
109 struct qmt_pool_info *pool = m->private;
110 LASSERT(pool != NULL);
111 if (unlikely(!test_bit(QPI_FLAG_STATE_INITED, &pool->qpi_flags)))
114 seq_printf(m, "%lu\n", pool->qpi_soft_least_qunit);
119 qpi_soft_least_qunit_seq_write(struct file *file, const char __user *buffer,
120 size_t count, loff_t *off)
122 struct seq_file *m = file->private_data;
123 struct qmt_pool_info *pool = m->private;
124 long long least_qunit, qunit;
127 LASSERT(pool != NULL);
128 if (unlikely(!test_bit(QPI_FLAG_STATE_INITED, &pool->qpi_flags)))
131 /* Not tuneable for inode limit */
132 if (pool->qpi_rtype != LQUOTA_RES_DT)
135 rc = kstrtoll_from_user(buffer, count, 0, &least_qunit);
139 /* Miminal qpi_soft_least_qunit */
140 qunit = pool->qpi_least_qunit << 2;
141 /* The value must be power of miminal qpi_soft_least_qunit, see
142 * how the qunit is adjusted in qmt_adjust_qunit(). */
143 while (qunit > 0 && qunit < least_qunit)
146 qunit = INT_MAX & ~3;
148 pool->qpi_soft_least_qunit = qunit;
151 LPROC_SEQ_FOPS(qpi_soft_least_qunit);
153 static struct lprocfs_vars lprocfs_quota_qpi_vars[] = {
155 .fops = &qpi_state_fops },
156 { .name = "soft_least_qunit",
157 .fops = &qpi_soft_least_qunit_fops },
162 * Allocate a new qmt_pool_info structure and add it to qmt_pool_list.
164 * \param env - is the environment passed by the caller
165 * \param qmt - is the quota master target
166 * \param pool_type - is the resource type of this pool instance, either
167 * LQUOTA_RES_MD or LQUOTA_RES_DT.
169 * \retval - 0 on success, appropriate error on failure
171 static int qmt_pool_alloc(const struct lu_env *env, struct qmt_device *qmt,
172 char *pool_name, int pool_type)
174 struct qmt_thread_info *qti = qmt_info(env);
175 struct qmt_pool_info *pool;
182 INIT_LIST_HEAD(&pool->qpi_linkage);
183 init_rwsem(&pool->qpi_recalc_sem);
185 pool->qpi_rtype = pool_type;
188 /* initialize refcount to 1, hash table will then grab an additional
190 atomic_set(&pool->qpi_ref, 1);
192 /* set up least qunit size to use for this pool */
193 pool->qpi_least_qunit = LQUOTA_LEAST_QUNIT(pool_type);
194 if (pool_type == LQUOTA_RES_DT)
195 pool->qpi_soft_least_qunit = pool->qpi_least_qunit << 2;
197 pool->qpi_soft_least_qunit = pool->qpi_least_qunit;
199 /* grab reference on master target that this pool belongs to */
200 lu_device_get(qmt2lu_dev(qmt));
201 lu_ref_add(&qmt2lu_dev(qmt)->ld_reference, "pool", pool);
204 /* create pool proc directory */
205 snprintf(qti->qti_buf, LQUOTA_NAME_MAX, "%s-%s",
206 RES_NAME(pool_type), pool_name);
207 strncpy(pool->qpi_name, pool_name, QPI_MAXNAME);
208 pool->qpi_proc = lprocfs_register(qti->qti_buf, qmt->qmt_proc,
209 lprocfs_quota_qpi_vars, pool);
210 if (IS_ERR(pool->qpi_proc)) {
211 rc = PTR_ERR(pool->qpi_proc);
212 CERROR("%s: failed to create proc entry for pool %s (%d)\n",
213 qmt->qmt_svname, qti->qti_buf, rc);
214 pool->qpi_proc = NULL;
218 rc = qmt_sarr_pool_init(pool);
222 /* add to qmt pool list */
223 down_write(&qmt->qmt_pool_lock);
224 list_add_tail(&pool->qpi_linkage, &qmt->qmt_pool_list);
225 up_write(&qmt->qmt_pool_lock);
229 /* this frees the pool structure since refcount is equal to 1 */
230 qpi_putref(env, pool);
235 * Delete a qmt_pool_info instance and all structures associated.
237 * \param env - is the environment passed by the caller
238 * \param pool - is the qmt_pool_info structure to free
240 void qmt_pool_free(const struct lu_env *env, struct qmt_pool_info *pool)
242 struct qmt_device *qmt = pool->qpi_qmt;
246 /* remove from list */
247 down_write(&qmt->qmt_pool_lock);
248 list_del_init(&pool->qpi_linkage);
249 up_write(&qmt->qmt_pool_lock);
251 if (atomic_read(&pool->qpi_ref) > 0)
254 qmt_stop_pool_recalc(pool);
255 qmt_sarr_pool_free(pool);
257 /* release proc entry */
258 if (pool->qpi_proc) {
259 lprocfs_remove(&pool->qpi_proc);
260 pool->qpi_proc = NULL;
263 /* release per-quota type site used to manage quota entries as well as
264 * references to global index files */
265 for (qtype = 0; qtype < LL_MAXQUOTAS; qtype++) {
266 /* release lqe storing grace time */
267 if (pool->qpi_grace_lqe[qtype] != NULL)
268 lqe_putref(pool->qpi_grace_lqe[qtype]);
271 if (pool->qpi_site[qtype] != NULL &&
272 !IS_ERR(pool->qpi_site[qtype]))
273 lquota_site_free(env, pool->qpi_site[qtype]);
274 /* release reference to global index */
275 if (pool->qpi_glb_obj[qtype] != NULL &&
276 !IS_ERR(pool->qpi_glb_obj[qtype]))
277 dt_object_put(env, pool->qpi_glb_obj[qtype]);
280 /* release reference on pool directory */
281 if (pool->qpi_root != NULL && !IS_ERR(pool->qpi_root))
282 dt_object_put(env, pool->qpi_root);
284 /* release reference on the master target */
285 if (pool->qpi_qmt != NULL) {
286 struct lu_device *ld = qmt2lu_dev(pool->qpi_qmt);
288 lu_ref_del(&ld->ld_reference, "pool", pool);
290 pool->qpi_qmt = NULL;
293 LASSERT(list_empty(&pool->qpi_linkage));
297 static inline void qti_pools_init(const struct lu_env *env)
299 struct qmt_thread_info *qti = qmt_info(env);
301 qti->qti_pools_cnt = 0;
302 qti->qti_pools_num = QMT_MAX_POOL_NUM;
305 #define qti_pools(qti) (qti->qti_pools_num > QMT_MAX_POOL_NUM ? \
306 qti->qti_pools : qti->qti_pools_small)
307 #define qti_pools_env(env) \
308 (qmt_info(env)->qti_pools_num > QMT_MAX_POOL_NUM ? \
309 qmt_info(env)->qti_pools : qmt_info(env)->qti_pools_small)
310 #define qti_pools_cnt(env) (qmt_info(env)->qti_pools_cnt)
312 static inline int qti_pools_add(const struct lu_env *env,
313 struct qmt_pool_info *qpi)
315 struct qmt_thread_info *qti = qmt_info(env);
316 struct qmt_pool_info **pools = qti->qti_pools;
318 pools = qti_pools(qti);
319 LASSERTF(qti->qti_pools_num >= QMT_MAX_POOL_NUM,
320 "Forgot init? %p\n", qti);
322 if (qti->qti_pools_cnt >= qti->qti_pools_num) {
323 OBD_ALLOC(pools, sizeof(qpi) * qti->qti_pools_num * 2);
326 memcpy(pools, qti_pools(qti), qti->qti_pools_cnt * sizeof(qpi));
327 /* Don't need to free, if it is the very 1st allocation */
328 if (qti->qti_pools_num > QMT_MAX_POOL_NUM)
329 OBD_FREE(qti->qti_pools,
330 qti->qti_pools_num * sizeof(qpi));
331 qti->qti_pools = pools;
332 qti->qti_pools_num *= 2;
336 /* Take this to protect pool's lqes against changing by
337 * recalculation thread. This would be unlocked at
339 down_read(&qpi->qpi_recalc_sem);
340 if (qmt_pool_global(qpi) && qti_pools_cnt(env) > 0) {
341 pools[qti->qti_pools_cnt++] = pools[0];
342 /* Store global pool always at index 0 */
345 pools[qti->qti_pools_cnt++] = qpi;
348 CDEBUG(D_QUOTA, "Pool %s is added, pools %p qti_pools %p pool_num %d\n",
349 qpi->qpi_name, pools, qti->qti_pools, qti->qti_pools_cnt);
354 static inline void qti_pools_fini(const struct lu_env *env)
356 struct qmt_thread_info *qti = qmt_info(env);
357 struct qmt_pool_info **pools = qti->qti_pools;
360 LASSERT(qti->qti_pools_cnt > 0);
362 pools = qti_pools(qti);
363 for (i = 0; i < qti->qti_pools_cnt; i++) {
364 up_read(&pools[i]->qpi_recalc_sem);
365 qpi_putref(env, pools[i]);
368 if (qti->qti_pools_num > QMT_MAX_POOL_NUM)
369 OBD_FREE(qti->qti_pools,
370 qti->qti_pools_num * sizeof(struct qmt_pool_info *));
374 * Look-up a pool in a list based on the type.
376 * \param env - is the environment passed by the caller
377 * \param qmt - is the quota master target
378 * \param rtype - is the type of this pool, either LQUOTA_RES_MD or
380 * \param pool_name - is the pool name to search for
381 * \param idx - OST or MDT index to search for. When it is >= 0, function
382 * returns array with pointers to all pools that include
383 * targets with requested index.
384 * \param add - add to qti_pool_arr if true
386 struct qmt_pool_info *qmt_pool_lookup(const struct lu_env *env,
387 struct qmt_device *qmt,
392 struct qmt_pool_info *pos, *pool;
396 down_read(&qmt->qmt_pool_lock);
397 if (list_empty(&qmt->qmt_pool_list)) {
398 up_read(&qmt->qmt_pool_lock);
399 RETURN(ERR_PTR(-ENOENT));
402 CDEBUG(D_QUOTA, "type %d name %s index %d\n",
403 rtype, pool_name ?: "<none>", idx);
404 /* Now just find a pool with correct type in a list. Further we need
405 * to go through the list and find a pool that includes requested OST
406 * or MDT. Possibly this would return a list of pools that includes
407 * needed target(OST/MDT). */
409 if (idx == -1 && !pool_name)
410 pool_name = GLB_POOL_NAME;
412 list_for_each_entry(pos, &qmt->qmt_pool_list, qpi_linkage) {
413 if (pos->qpi_rtype != rtype)
416 if (idx >= 0 && !qmt_sarr_check_idx(pos, idx)) {
417 rc = qti_pools_add(env, pos);
423 if (pool_name && !strncmp(pool_name, pos->qpi_name,
427 rc = qti_pools_add(env, pos);
436 up_read(&qmt->qmt_pool_lock);
441 if (idx >= 0 && qti_pools_cnt(env))
442 pool = qti_pools_env(env)[0];
444 RETURN(pool ? : ERR_PTR(-ENOENT));
446 CERROR("%s: cannot add pool %s: err = %d\n",
447 qmt->qmt_svname, pos->qpi_name, rc);
452 * Functions implementing the pool API, used by the qmt handlers
456 * Destroy all pools which are still in the pool list.
458 * \param env - is the environment passed by the caller
459 * \param qmt - is the quota master target
462 void qmt_pool_fini(const struct lu_env *env, struct qmt_device *qmt)
464 struct qmt_pool_info *pool, *tmp;
467 /* parse list of pool and destroy each element */
468 list_for_each_entry_safe(pool, tmp, &qmt->qmt_pool_list, qpi_linkage) {
469 /* release extra reference taken in qmt_pool_alloc */
470 qpi_putref(env, pool);
472 LASSERT(list_empty(&qmt->qmt_pool_list));
478 * Initialize pool configure for the quota master target. For now, we only
479 * support the default data (i.e. all OSTs) and metadata (i.e. all the MDTs)
480 * pool which are instantiated in this function.
482 * \param env - is the environment passed by the caller
483 * \param qmt - is the quota master target for which we have to initialize the
486 * \retval - 0 on success, appropriate error on failure
488 int qmt_pool_init(const struct lu_env *env, struct qmt_device *qmt)
493 INIT_LIST_HEAD(&qmt->qmt_pool_list);
494 init_rwsem(&qmt->qmt_pool_lock);
496 /* Instantiate pool master for the default data and metadata pool.
497 * This code will have to be revisited once we support quota on
498 * non-default pools */
499 for (res = LQUOTA_FIRST_RES; res < LQUOTA_LAST_RES; res++) {
500 rc = qmt_pool_alloc(env, qmt, GLB_POOL_NAME, res);
506 qmt_pool_fini(env, qmt);
511 static int qmt_slv_cnt(const struct lu_env *env, struct lu_fid *glb_fid,
512 char *slv_name, struct lu_fid *slv_fid, void *arg)
514 struct obd_uuid uuid;
515 int (*nr)[QMT_STYPE_CNT][LL_MAXQUOTAS] = arg;
519 rc = lquota_extract_fid(glb_fid, NULL, &qtype);
522 obd_str2uuid(&uuid, slv_name);
523 stype = qmt_uuid2idx(&uuid, NULL);
527 (*nr)[stype][qtype]++;
528 CDEBUG(D_QUOTA, "slv_name %s stype %d qtype %d nr %d\n",
529 slv_name, stype, qtype, (*nr)[stype][qtype]);
535 * Set up on-disk index files associated with each pool.
537 * \param env - is the environment passed by the caller
538 * \param qmt - is the quota master target for which we have to initialize the
540 * \param qmt_root - is the on-disk directory created for the QMT.
541 * \param name - is the pool name that we need to setup. Setup all pools
542 * in qmt_pool_list when name is NULL.
544 * \retval - 0 on success, appropriate error on failure
546 int qmt_pool_prepare(const struct lu_env *env, struct qmt_device *qmt,
547 struct dt_object *qmt_root, char *name)
549 struct qmt_thread_info *qti = qmt_info(env);
550 struct lquota_glb_rec *rec = &qti->qti_glb_rec;
551 struct qmt_pool_info *pool;
552 struct dt_device *dev = NULL;
553 dt_obj_version_t version;
554 struct list_head *pos;
555 int rc = 0, i, qtype;
558 /* iterate over each pool in the list and allocate a quota site for each
559 * one. This involves creating a global index file on disk */
560 list_for_each(pos, &qmt->qmt_pool_list) {
561 struct dt_object *obj;
562 struct lquota_entry *lqe;
566 pool = list_entry(pos, struct qmt_pool_info,
569 pool_name = pool->qpi_name;
570 if (name && strncmp(pool_name, name, LOV_MAXPOOLNAME))
572 rtype = pool->qpi_rtype;
574 dev = pool->qpi_qmt->qmt_child;
576 /* allocate directory for this pool */
577 snprintf(qti->qti_buf, LQUOTA_NAME_MAX, "%s-%s",
578 RES_NAME(rtype), pool_name);
579 obj = lquota_disk_dir_find_create(env, qmt->qmt_child, qmt_root,
582 RETURN(PTR_ERR(obj));
583 pool->qpi_root = obj;
585 for (qtype = 0; qtype < LL_MAXQUOTAS; qtype++) {
586 /* Generating FID of global index in charge of storing
587 * settings for this quota type */
588 lquota_generate_fid(&qti->qti_fid, rtype, qtype);
590 /* open/create the global index file for this quota
591 * type. If name is set, it means we came here from
592 * qmt_pool_new and can create glb index with a
593 * local generated FID. */
594 obj = lquota_disk_glb_find_create(env, dev,
597 name ? true : false);
600 CERROR("%s: failed to create glb index copy for %s type: rc = %d\n",
601 qmt->qmt_svname, qtype_name(qtype), rc);
605 pool->qpi_glb_obj[qtype] = obj;
607 version = dt_version_get(env, obj);
608 /* set default grace time for newly created index */
610 rec->qbr_hardlimit = 0;
611 rec->qbr_softlimit = 0;
612 rec->qbr_granted = 0;
613 rec->qbr_time = rtype == LQUOTA_RES_MD ?
614 MAX_IQ_TIME : MAX_DQ_TIME;
616 rc = lquota_disk_write_glb(env, obj, 0, rec);
618 CERROR("%s: failed to set default grace time for %s type: rc = %d\n",
619 qmt->qmt_svname, qtype_name(qtype), rc);
623 rc = lquota_disk_update_ver(env, dev, obj, 1);
625 CERROR("%s: failed to set initial version for %s type: rc = %d\n",
626 qmt->qmt_svname, qtype_name(qtype), rc);
631 /* create quota entry site for this quota type */
632 pool->qpi_site[qtype] = lquota_site_alloc(env, pool,
635 if (IS_ERR(pool->qpi_site[qtype])) {
636 rc = PTR_ERR(pool->qpi_site[qtype]);
637 CERROR("%s: failed to create site for %s type: rc = %d\n",
638 qmt->qmt_svname, qtype_name(qtype), rc);
642 /* count number of slaves which already connected to
643 * the master in the past */
644 for (i = 0; i < QMT_STYPE_CNT; i++)
645 pool->qpi_slv_nr[i][qtype] = 0;
647 rc = lquota_disk_for_each_slv(env, pool->qpi_root,
652 CERROR("%s: failed to scan & count slave indexes for %s type: rc = %d\n",
653 qmt->qmt_svname, qtype_name(qtype), rc);
657 /* Global grace time is stored in quota settings of
659 qti->qti_id.qid_uid = 0;
661 /* look-up quota entry storing grace time */
662 lqe = lqe_locate(env, pool->qpi_site[qtype],
665 RETURN(PTR_ERR(lqe));
666 pool->qpi_grace_lqe[qtype] = lqe;
667 #ifdef CONFIG_PROC_FS
668 /* add procfs file to dump the global index, mostly for
669 * debugging purpose */
670 snprintf(qti->qti_buf, MTI_NAME_MAXLEN,
671 "glb-%s", qtype_name(qtype));
672 rc = lprocfs_seq_create(pool->qpi_proc, qti->qti_buf,
673 0444, &lprocfs_quota_seq_fops,
676 CWARN("%s: Error adding procfs file for global quota index "DFID": rc = %d\n",
677 qmt->qmt_svname, PFID(&qti->qti_fid), rc);
680 set_bit(QPI_FLAG_STATE_INITED, &pool->qpi_flags);
689 * Handle new slave connection. Called when a slave enqueues the global quota
690 * lock at the beginning of the reintegration procedure.
692 * \param env - is the environment passed by the caller
693 * \parap qmt - is the quota master target handling this request
694 * \param glb_fid - is the fid of the global index file
695 * \param slv_fid - is the fid of the newly created slave index file
696 * \param slv_ver - is the current version of the slave index file
697 * \param uuid - is the uuid of slave which is (re)connecting to the master
700 * \retval - 0 on success, appropriate error on failure
702 int qmt_pool_new_conn(const struct lu_env *env, struct qmt_device *qmt,
703 struct lu_fid *glb_fid, struct lu_fid *slv_fid,
704 __u64 *slv_ver, struct obd_uuid *uuid)
706 struct qmt_pool_info *pool;
707 struct dt_object *slv_obj;
708 int pool_type, qtype, stype;
709 bool created = false;
712 stype = qmt_uuid2idx(uuid, &idx);
716 /* extract pool info from global index FID */
717 rc = lquota_extract_fid(glb_fid, &pool_type, &qtype);
721 /* look-up pool in charge of this global index FID */
723 pool = qmt_pool_lookup_arr(env, qmt, pool_type, idx);
725 RETURN(PTR_ERR(pool));
727 /* look-up slave index file */
728 slv_obj = lquota_disk_slv_find(env, qmt->qmt_child, pool->qpi_root,
730 if (IS_ERR(slv_obj) && PTR_ERR(slv_obj) == -ENOENT) {
731 /* create slave index file */
732 slv_obj = lquota_disk_slv_find_create(env, qmt->qmt_child,
733 pool->qpi_root, glb_fid,
737 if (IS_ERR(slv_obj)) {
738 rc = PTR_ERR(slv_obj);
739 CERROR("%s: failed to create quota slave index file for %s (%d)"
740 "\n", qmt->qmt_svname, obd_uuid2str(uuid), rc);
744 /* retrieve slave fid & current object version */
745 memcpy(slv_fid, lu_object_fid(&slv_obj->do_lu), sizeof(*slv_fid));
746 *slv_ver = dt_version_get(env, slv_obj);
747 dt_object_put(env, slv_obj);
749 for (i = 0; i < qti_pools_cnt(env); i++)
750 qti_pools_env(env)[i]->qpi_slv_nr[stype][qtype]++;
757 * Look-up a lquota_entry in the pool hash and allocate it if not found.
759 * \param env - is the environment passed by the caller
760 * \param qmt - is the quota master target for which we have to initialize the
762 * \param pool_type - is the pool type, either LQUOTA_RES_MD or LQUOTA_RES_DT.
763 * \param qtype - is the quota type, either user or group.
764 * \param qid - is the quota ID to look-up
766 * \retval - valid pointer to lquota entry on success, appropriate error on
769 struct lquota_entry *qmt_pool_lqe_lookup(const struct lu_env *env,
770 struct qmt_device *qmt,
771 int pool_type, int qtype,
772 union lquota_id *qid,
775 struct qmt_pool_info *pool;
776 struct lquota_entry *lqe;
779 /* look-up pool responsible for this global index FID */
780 pool = qmt_pool_lookup_name(env, qmt, pool_type, pool_name);
782 RETURN(ERR_CAST(pool));
784 if (qid->qid_uid == 0) {
785 /* caller wants to access grace time, no need to look up the
786 * entry since we keep a reference on ID 0 all the time */
787 lqe = pool->qpi_grace_lqe[qtype];
792 /* now that we have the pool, let's look-up the quota entry in the
793 * right quota site */
794 lqe = lqe_locate(env, pool->qpi_site[qtype], qid);
796 qpi_putref(env, pool);
800 int qmt_pool_lqes_lookup(const struct lu_env *env,
801 struct qmt_device *qmt,
802 int rtype, int stype,
803 int qtype, union lquota_id *qid,
804 char *pool_name, int idx)
806 struct qmt_pool_info *pool;
807 struct lquota_entry *lqe;
811 /* Until MDT pools are not emplemented, all MDTs belong to
812 * global pool, thus lookup lqes only from global pool. */
813 if (rtype == LQUOTA_RES_DT && stype == QMT_STYPE_MDT)
818 /* look-up pool responsible for this global index FID */
819 pool = qmt_pool_lookup_arr(env, qmt, rtype, idx);
822 RETURN(PTR_ERR(pool));
825 /* now that we have the pool, let's look-up the quota entry in the
826 * right quota site */
828 for (i = 0; i < qti_pools_cnt(env); i++) {
829 pool = qti_pools_env(env)[i];
830 lqe = lqe_locate(env, pool->qpi_site[qtype], qid);
833 GOTO(out, rc = PTR_ERR(lqe));
835 qti_lqes_add(env, lqe);
837 LASSERT(qti_lqes_glbl(env)->lqe_is_global);
844 static int lqes_cmp(const void *arg1, const void *arg2)
846 const struct lquota_entry *lqe1, *lqe2;
848 lqe1 = *(const struct lquota_entry **)arg1;
849 lqe2 = *(const struct lquota_entry **)arg2;
850 if (lqe1->lqe_qunit > lqe2->lqe_qunit)
852 if (lqe1->lqe_qunit < lqe2->lqe_qunit)
857 void qmt_lqes_sort(const struct lu_env *env)
859 sort(qti_lqes(env), qti_lqes_cnt(env), sizeof(void *), lqes_cmp, NULL);
860 /* global lqe was moved during sorting */
861 if (!qti_lqes_glbl(env)->lqe_is_global) {
863 for (i = 0; i < qti_lqes_cnt(env); i++) {
864 if (qti_lqes(env)[i]->lqe_is_global) {
865 qti_glbl_lqe_idx(env) = i;
872 int qmt_pool_lqes_lookup_spec(const struct lu_env *env, struct qmt_device *qmt,
873 int rtype, int qtype, union lquota_id *qid)
875 struct qmt_pool_info *pos;
876 struct lquota_entry *lqe;
880 down_read(&qmt->qmt_pool_lock);
881 if (list_empty(&qmt->qmt_pool_list)) {
882 up_read(&qmt->qmt_pool_lock);
886 list_for_each_entry(pos, &qmt->qmt_pool_list, qpi_linkage) {
887 if (pos->qpi_rtype != rtype)
889 /* Don't take into account pools without slaves */
890 if (!qpi_slv_nr(pos, qtype))
892 lqe = lqe_find(env, pos->qpi_site[qtype], qid);
893 /* ENOENT is valid case for lqe from non global pool
894 * that hasn't limits, i.e. not enforced. Continue even
895 * in case of error - we can handle already found lqes */
896 if (IS_ERR_OR_NULL(lqe)) {
897 /* let know that something went wrong */
898 rc = lqe ? PTR_ERR(lqe) : -ENOENT;
901 if (!lqe->lqe_enforced) {
902 /* no settings for this qid_uid */
906 qti_lqes_add(env, lqe);
907 CDEBUG(D_QUOTA, "adding lqe %p from pool %s\n",
910 up_read(&qmt->qmt_pool_lock);
915 * Allocate a new pool for the specified device.
917 * Allocate a new pool_desc structure for the specified \a new_pool
918 * device to create a pool with the given \a poolname. The new pool
919 * structure is created with a single reference, and is freed when the
920 * reference count drops to zero.
922 * \param[in] obd Lustre OBD device on which to add a pool iterator
923 * \param[in] poolname the name of the pool to be created
925 * \retval 0 in case of success
926 * \retval negative error code in case of error
928 int qmt_pool_new(struct obd_device *obd, char *poolname)
930 struct qmt_device *qmt = lu2qmt_dev(obd->obd_lu_dev);
931 struct qmt_pool_info *qpi;
936 if (strnlen(poolname, LOV_MAXPOOLNAME + 1) > LOV_MAXPOOLNAME)
937 RETURN(-ENAMETOOLONG);
939 rc = lu_env_init(&env, LCT_MD_THREAD);
941 CERROR("%s: can't init env: rc = %d\n", obd->obd_name, rc);
945 qpi = qmt_pool_lookup_name(&env, qmt, LQUOTA_RES_DT, poolname);
947 /* Valid case when several MDTs are mounted
948 * at the same node. */
949 CDEBUG(D_QUOTA, "pool %s already exists\n", poolname);
950 qpi_putref(&env, qpi);
951 GOTO(out_env, rc = -EEXIST);
953 if (PTR_ERR(qpi) != -ENOENT) {
954 CWARN("%s: pool %s lookup failed: rc = %ld\n",
955 obd->obd_name, poolname, PTR_ERR(qpi));
956 GOTO(out_env, rc = PTR_ERR(qpi));
959 /* Now allocate and prepare only DATA pool.
960 * Further when MDT pools will be ready we need to add
961 * a cycle here and setup pools of both types. Another
962 * approach is to find out pool of which type should be
964 rc = qmt_pool_alloc(&env, qmt, poolname, LQUOTA_RES_DT);
966 CERROR("%s: can't alloc pool %s: rc = %d\n",
967 obd->obd_name, poolname, rc);
971 rc = qmt_pool_prepare(&env, qmt, qmt->qmt_root, poolname);
973 CERROR("%s: can't prepare pool for %s: rc = %d\n",
974 obd->obd_name, poolname, rc);
978 CDEBUG(D_QUOTA, "Quota pool "LOV_POOLNAMEF" added\n",
983 qpi = qmt_pool_lookup_name(&env, qmt, LQUOTA_RES_DT, poolname);
985 qpi_putref(&env, qpi);
986 qpi_putref(&env, qpi);
994 qmt_obj_recalc(const struct lu_env *env, struct dt_object *obj,
995 struct lquota_site *site)
997 struct qmt_thread_info *qti = qmt_info(env);
998 union lquota_id *qid = &qti->qti_id;
999 const struct dt_it_ops *iops;
1006 iops = &obj->do_index_ops->dio_it;
1008 it = iops->init(env, obj, 0);
1010 CWARN("quota: initialize it for "DFID" failed: rc = %ld\n",
1011 PFID(&qti->qti_fid), PTR_ERR(it));
1012 RETURN(PTR_ERR(it));
1015 rc = iops->load(env, it, 0);
1017 CWARN("quota: load first entry for "DFID" failed: rc = %d\n",
1018 PFID(&qti->qti_fid), rc);
1020 } else if (rc == 0) {
1021 rc = iops->next(env, it);
1023 GOTO(out, rc = (rc < 0) ? rc : 0);
1027 struct lquota_entry *lqe;
1029 key = iops->key(env, it);
1031 CWARN("quota: error key for "DFID": rc = %ld\n",
1032 PFID(&qti->qti_fid), PTR_ERR(key));
1033 GOTO(out, rc = PTR_ERR(key));
1036 /* skip the root user/group */
1037 if (*((__u64 *)key) == 0)
1040 qid->qid_uid = *((__u64 *)key);
1042 rc = qmt_slv_read(env, qid, obj, &granted);
1046 lqe = lqe_locate(env, site, qid);
1048 GOTO(out, rc = PTR_ERR(lqe));
1049 lqe_write_lock(lqe);
1050 lqe->lqe_recalc_granted += granted;
1051 lqe_write_unlock(lqe);
1054 rc = iops->next(env, it);
1056 CWARN("quota: failed to parse index "DFID
1057 ", ->next error: rc = %d\n",
1058 PFID(&qti->qti_fid), rc);
1059 } while (rc == 0 && !kthread_should_stop());
1063 iops->fini(env, it);
1067 static int qmt_site_recalc_cb(struct cfs_hash *hs, struct cfs_hash_bd *bd,
1068 struct hlist_node *hnode, void *data)
1070 struct lquota_entry *lqe;
1071 struct lu_env *env = data;
1073 lqe = hlist_entry(hnode, struct lquota_entry, lqe_hash);
1074 LASSERT(atomic_read(&lqe->lqe_ref) > 0);
1076 lqe_write_lock(lqe);
1077 if (lqe->lqe_granted != lqe->lqe_recalc_granted) {
1078 struct qmt_device *qmt = lqe2qpi(lqe)->qpi_qmt;
1080 bool need_notify = false;
1083 LQUOTA_DEBUG(lqe, "lqe_recalc_granted %llu\n",
1084 lqe->lqe_recalc_granted);
1085 lqe->lqe_granted = lqe->lqe_recalc_granted;
1086 /* Always returns true, if there is no slaves in a pool */
1087 need_notify |= qmt_adjust_qunit(env, lqe);
1088 need_notify |= qmt_adjust_edquot(lqe, ktime_get_real_seconds());
1090 /* Find all lqes with lqe_id to reseed lgd array */
1091 rc = qmt_pool_lqes_lookup_spec(env, qmt, lqe_rtype(lqe),
1092 lqe_qtype(lqe), &lqe->lqe_id);
1093 if (!rc && qti_lqes_glbl(env)->lqe_glbl_data) {
1095 qti_lqes_glbl(env)->lqe_glbl_data);
1096 qmt_id_lock_notify(qmt, qti_lqes_glbl(env));
1100 th = dt_trans_create(env, qmt->qmt_child);
1104 rc = lquota_disk_declare_write(env, th,
1110 rc = dt_trans_start_local(env, qmt->qmt_child, th);
1114 qmt_glb_write(env, th, lqe, 0, NULL);
1116 dt_trans_stop(env, qmt->qmt_child, th);
1119 lqe->lqe_recalc_granted = 0;
1120 lqe_write_unlock(lqe);
1125 #define MDT_DEV_NAME_LEN (LUSTRE_MAXFSNAME + sizeof("-MDT0000"))
1126 static struct obd_device *qmt_get_mgc(struct qmt_device *qmt)
1128 char mdt_name[MDT_DEV_NAME_LEN];
1129 struct lustre_mount_info *lmi;
1130 struct obd_device *obd;
1134 rc = server_name2fsname(qmt->qmt_svname, mdt_name, NULL);
1136 CERROR("quota: cannot get server name from %s: rc = %d\n",
1137 qmt->qmt_svname, rc);
1138 RETURN(ERR_PTR(rc));
1141 strlcat(mdt_name, "-MDT0000", MDT_DEV_NAME_LEN);
1142 lmi = server_get_mount(mdt_name);
1145 CERROR("%s: cannot get mount info from %s: rc = %d\n",
1146 qmt->qmt_svname, mdt_name, rc);
1147 RETURN(ERR_PTR(rc));
1149 obd = s2lsi(lmi->lmi_sb)->lsi_mgc;
1150 lustre_put_lsi(lmi->lmi_sb);
1155 static int qmt_pool_recalc(void *args)
1157 struct qmt_pool_info *pool, *glbl_pool;
1158 struct rw_semaphore *sem = NULL;
1159 struct obd_device *obd;
1161 int i, rc, qtype, slaves_cnt;
1166 rc = lu_env_init(&env, LCT_MD_THREAD);
1168 CERROR("%s: cannot init env: rc = %d\n",
1169 pool->qpi_qmt->qmt_svname, rc);
1173 obd = qmt_get_mgc(pool->qpi_qmt);
1175 GOTO(out, rc = PTR_ERR(obd));
1177 /* Waiting for the end of processing mgs config.
1178 * It is needed to be sure all pools are configured. */
1179 while (obd->obd_process_conf)
1180 schedule_timeout_uninterruptible(cfs_time_seconds(1));
1182 sem = qmt_sarr_rwsem(pool);
1185 /* Hold this to be sure that OSTs from this pool
1186 * can't do acquire/release.
1188 * I guess below write semaphore could be a bottleneck
1189 * as qmt_dqacq would be blocked trying to hold
1190 * read_lock at qmt_pool_lookup->qti_pools_add.
1191 * But on the other hand adding/removing OSTs to the pool is
1192 * a rare operation. If finally this would be a problem,
1193 * we can consider another approach. For example we can
1194 * iterate through the POOL's lqes. Take lqe, hold lqe_write_lock
1195 * and go through appropriate OSTs. I don't use this approach now
1196 * as newly created pool hasn't lqes entries. So firstly we need
1197 * to get this lqes from the global pool index file. This
1198 * solution looks more complex, so leave it as it is. */
1199 down_write(&pool->qpi_recalc_sem);
1201 glbl_pool = qmt_pool_lookup_glb(&env, pool->qpi_qmt, pool->qpi_rtype);
1202 if (IS_ERR(glbl_pool))
1203 GOTO(out, rc = PTR_ERR(glbl_pool));
1205 slaves_cnt = qmt_sarr_count(pool);
1206 CDEBUG(D_QUOTA, "Starting pool recalculation for %d slaves in %s\n",
1207 slaves_cnt, pool->qpi_name);
1209 for (qtype = 0; qtype < LL_MAXQUOTAS; qtype++) {
1210 for (i = 0; i < slaves_cnt; i++) {
1211 struct qmt_thread_info *qti = qmt_info(&env);
1212 struct dt_object *slv_obj;
1213 struct obd_uuid uuid;
1216 if (kthread_should_stop())
1217 GOTO(out_stop, rc = 0);
1218 idx = qmt_sarr_get_idx(pool, i);
1221 /* We don't need fsname here - anyway
1222 * lquota_disk_slv_filename ignores it. */
1223 snprintf(uuid.uuid, UUID_MAX, "-OST%04x_UUID", idx);
1224 lquota_generate_fid(&qti->qti_fid, pool->qpi_rtype,
1226 /* look-up index file associated with acquiring slave */
1227 slv_obj = lquota_disk_slv_find(&env,
1228 glbl_pool->qpi_qmt->qmt_child,
1229 glbl_pool->qpi_root,
1232 if (IS_ERR(slv_obj))
1233 GOTO(out_stop, rc = PTR_ERR(slv_obj));
1235 CDEBUG(D_QUOTA, "slv_obj is found %p for uuid %s\n",
1236 slv_obj, uuid.uuid);
1237 qmt_obj_recalc(&env, slv_obj, pool->qpi_site[qtype]);
1238 dt_object_put(&env, slv_obj);
1240 /* Now go trough the site hash and compare lqe_granted
1241 * with lqe_calc_granted. Write new value if disagree */
1243 cfs_hash_for_each(pool->qpi_site[qtype]->lqs_hash,
1244 qmt_site_recalc_cb, &env);
1248 qpi_putref(&env, glbl_pool);
1250 if (xchg(&pool->qpi_recalc_task, NULL) == NULL)
1252 * Someone is waiting for us to stop - be sure not to exit
1253 * before kthread_stop() gets a ref on the task. No event
1254 * will happen on 'pool, this is just a convenient way to
1257 wait_var_event(pool, kthread_should_stop());
1259 clear_bit(QPI_FLAG_RECALC_OFFSET, &pool->qpi_flags);
1260 /* Pool can't be changed, since sem has been down.
1261 * Thus until up_read, no one can restart recalc thread.
1265 up_write(&pool->qpi_recalc_sem);
1268 /* qpi_getref has been called in qmt_start_pool_recalc,
1269 * however we can't call qpi_putref if lu_env_init failed.
1271 if (env.le_ctx.lc_state == LCS_ENTERED) {
1272 qpi_putref(&env, pool);
1279 static int qmt_start_pool_recalc(struct lu_env *env, struct qmt_pool_info *qpi)
1281 struct task_struct *task;
1284 if (!test_and_set_bit(QPI_FLAG_RECALC_OFFSET, &qpi->qpi_flags)) {
1285 LASSERT(!qpi->qpi_recalc_task);
1288 task = kthread_create(qmt_pool_recalc, qpi,
1289 "qsd_reint_%s", qpi->qpi_name);
1291 clear_bit(QPI_FLAG_RECALC_OFFSET, &qpi->qpi_flags);
1293 qpi_putref(env, qpi);
1295 qpi->qpi_recalc_task = task;
1296 /* Using park/unpark to start the thread ensures that
1297 * the thread function does get calls, so the
1298 * ref on qpi will be dropped
1301 kthread_unpark(task);
1308 static inline void qmt_stop_pool_recalc(struct qmt_pool_info *qpi)
1310 struct task_struct *task;
1312 task = xchg(&qpi->qpi_recalc_task, NULL);
1317 static int qmt_pool_slv_nr_change(const struct lu_env *env,
1318 struct qmt_pool_info *pool,
1321 struct qmt_pool_info *glbl_pool;
1324 glbl_pool = qmt_pool_lookup_glb(env, pool->qpi_qmt, LQUOTA_RES_DT);
1325 if (IS_ERR(glbl_pool))
1326 RETURN(PTR_ERR(glbl_pool));
1328 for (qtype = 0; qtype < LL_MAXQUOTAS; qtype++) {
1329 struct qmt_thread_info *qti = qmt_info(env);
1330 struct dt_object *slv_obj;
1331 struct obd_uuid uuid;
1333 /* We don't need fsname here - anyway
1334 * lquota_disk_slv_filename ignores it. */
1335 snprintf(uuid.uuid, UUID_MAX, "-OST%04x_UUID", idx);
1336 lquota_generate_fid(&qti->qti_fid, pool->qpi_rtype,
1338 /* look-up index file associated with acquiring slave */
1339 slv_obj = lquota_disk_slv_find(env,
1340 glbl_pool->qpi_qmt->qmt_child,
1341 glbl_pool->qpi_root,
1344 if (IS_ERR(slv_obj))
1348 pool->qpi_slv_nr[QMT_STYPE_OST][qtype]++;
1350 pool->qpi_slv_nr[QMT_STYPE_OST][qtype]--;
1351 dt_object_put(env, slv_obj);
1353 qpi_putref(env, glbl_pool);
1358 static int qmt_pool_add_rem(struct obd_device *obd, char *poolname,
1359 char *slavename, bool add)
1361 struct qmt_device *qmt = lu2qmt_dev(obd->obd_lu_dev);
1362 struct qmt_pool_info *qpi;
1367 if (strnlen(poolname, LOV_MAXPOOLNAME + 1) > LOV_MAXPOOLNAME)
1368 RETURN(-ENAMETOOLONG);
1370 CDEBUG(D_QUOTA, add ? "%s: pool %s, adding %s\n" :
1371 "%s: pool %s, removing %s\n",
1372 obd->obd_name, poolname, slavename);
1374 rc = server_name2index(slavename, &idx, NULL);
1375 if (rc != LDD_F_SV_TYPE_OST)
1378 rc = lu_env_init(&env, LCT_MD_THREAD);
1380 CERROR("%s: cannot init env: rc = %d\n", obd->obd_name, rc);
1384 qpi = qmt_pool_lookup_name(&env, qmt, LQUOTA_RES_DT, poolname);
1386 CWARN("%s: can't find pool %s: rc = %long\n",
1387 obd->obd_name, poolname, PTR_ERR(qpi));
1388 GOTO(out, rc = PTR_ERR(qpi));
1391 rc = add ? qmt_sarr_pool_add(qpi, idx, 32) :
1392 qmt_sarr_pool_rem(qpi, idx);
1394 CERROR("%s: can't %s %s pool %s: rc = %d\n",
1395 add ? "add to" : "remove", obd->obd_name,
1396 slavename, poolname, rc);
1397 GOTO(out_putref, rc);
1399 qmt_pool_slv_nr_change(&env, qpi, idx, add);
1400 qmt_start_pool_recalc(&env, qpi);
1403 qpi_putref(&env, qpi);
1412 * Add a single target device to the named pool.
1414 * \param[in] obd OBD device on which to add the pool
1415 * \param[in] poolname name of the pool to which to add the target \a slavename
1416 * \param[in] slavename name of the target device to be added
1418 * \retval 0 if \a slavename was (previously) added to the pool
1419 * \retval negative error number on failure
1421 int qmt_pool_add(struct obd_device *obd, char *poolname, char *slavename)
1423 return qmt_pool_add_rem(obd, poolname, slavename, true);
1427 * Remove the named target from the specified pool.
1429 * \param[in] obd OBD device from which to remove \a poolname
1430 * \param[in] poolname name of the pool to be changed
1431 * \param[in] slavename name of the target to remove from \a poolname
1433 * \retval 0 on successfully removing \a slavename from the pool
1434 * \retval negative number on error (e.g. \a slavename not in pool)
1436 int qmt_pool_rem(struct obd_device *obd, char *poolname, char *slavename)
1438 return qmt_pool_add_rem(obd, poolname, slavename, false);
1442 * Remove the named pool from the QMT device.
1444 * \param[in] obd OBD device on which pool was previously created
1445 * \param[in] poolname name of pool to remove from \a obd
1447 * \retval 0 on successfully removing the pool
1448 * \retval negative error numbers for failures
1450 int qmt_pool_del(struct obd_device *obd, char *poolname)
1452 struct qmt_device *qmt = lu2qmt_dev(obd->obd_lu_dev);
1453 struct qmt_pool_info *qpi;
1455 char buf[LQUOTA_NAME_MAX];
1461 if (strnlen(poolname, LOV_MAXPOOLNAME + 1) > LOV_MAXPOOLNAME)
1462 RETURN(-ENAMETOOLONG);
1464 CDEBUG(D_QUOTA, "Removing quota pool "LOV_POOLNAMEF"\n",
1467 rc = lu_env_init(&env, LCT_MD_THREAD);
1469 CERROR("%s: cannot init env: rc = %d\n", obd->obd_name, rc);
1473 /* look-up pool in charge of this global index FID */
1474 qpi = qmt_pool_lookup_name(&env, qmt, LQUOTA_RES_DT, poolname);
1476 /* Valid case for several MDTs at the same node -
1477 * pool removed by the 1st MDT in config */
1478 CDEBUG(D_QUOTA, "Cannot find pool %s\n", poolname);
1480 RETURN(PTR_ERR(qpi));
1483 for (qtype = 0; qtype < LL_MAXQUOTAS; qtype++) {
1484 lquota_generate_fid(&fid, LQUOTA_RES_DT, qtype);
1485 snprintf(buf, LQUOTA_NAME_MAX, "0x%x", fid.f_oid);
1486 rc = local_object_unlink(&env, qmt->qmt_child,
1487 qpi->qpi_root, buf);
1489 CWARN("%s: cannot unlink %s from pool %s: rc = %d\n",
1490 obd->obd_name, buf, poolname, rc);
1493 /* put ref from look-up */
1494 qpi_putref(&env, qpi);
1495 /* put last ref to free qpi */
1496 qpi_putref(&env, qpi);
1498 snprintf(buf, LQUOTA_NAME_MAX, "%s-%s",
1499 RES_NAME(LQUOTA_RES_DT), poolname);
1500 rc = local_object_unlink(&env, qmt->qmt_child, qmt->qmt_root, buf);
1502 CWARN("%s: cannot unlink dir %s: rc = %d\n",
1503 obd->obd_name, poolname, rc);
1509 static inline int qmt_sarr_pool_init(struct qmt_pool_info *qpi)
1512 /* No need to initialize sarray for global pool
1513 * as it always includes all slaves */
1514 if (qmt_pool_global(qpi))
1517 switch (qpi->qpi_rtype) {
1519 return lu_tgt_pool_init(&qpi->qpi_sarr.osts, 0);
1526 static inline int qmt_sarr_pool_add(struct qmt_pool_info *qpi, int idx, int min)
1528 switch (qpi->qpi_rtype) {
1530 return lu_tgt_pool_add(&qpi->qpi_sarr.osts, idx, min);
1537 static inline int qmt_sarr_pool_rem(struct qmt_pool_info *qpi, int idx)
1539 switch (qpi->qpi_rtype) {
1541 return lu_tgt_pool_remove(&qpi->qpi_sarr.osts, idx);
1548 static inline void qmt_sarr_pool_free(struct qmt_pool_info *qpi)
1550 if (qmt_pool_global(qpi))
1553 switch (qpi->qpi_rtype) {
1555 if (qpi->qpi_sarr.osts.op_array)
1556 lu_tgt_pool_free(&qpi->qpi_sarr.osts);
1564 static inline int qmt_sarr_check_idx(struct qmt_pool_info *qpi, int idx)
1566 if (qmt_pool_global(qpi))
1569 switch (qpi->qpi_rtype) {
1571 return lu_tgt_check_index(idx, &qpi->qpi_sarr.osts);
1578 struct rw_semaphore *qmt_sarr_rwsem(struct qmt_pool_info *qpi)
1580 switch (qpi->qpi_rtype) {
1582 /* to protect ost_pool use */
1583 return &qpi->qpi_sarr.osts.op_rw_sem;
1590 int qmt_sarr_get_idx(struct qmt_pool_info *qpi, int arr_idx)
1593 if (qmt_pool_global(qpi))
1596 switch (qpi->qpi_rtype) {
1598 LASSERTF(arr_idx < qpi->qpi_sarr.osts.op_count && arr_idx >= 0,
1599 "idx invalid %d op_count %d\n", arr_idx,
1600 qpi->qpi_sarr.osts.op_count);
1601 return qpi->qpi_sarr.osts.op_array[arr_idx];
1608 /* Number of slaves in a pool */
1609 unsigned int qmt_sarr_count(struct qmt_pool_info *qpi)
1611 switch (qpi->qpi_rtype) {
1613 return qpi->qpi_sarr.osts.op_count;