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"
97 " quota_servers: %d\n"
98 " quota_entries: %d\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 /* stop all recalc threads - it may hold qpi reference */
470 qmt_stop_pool_recalc(pool);
471 /* release extra reference taken in qmt_pool_alloc */
472 qpi_putref(env, pool);
474 LASSERT(list_empty(&qmt->qmt_pool_list));
480 * Initialize pool configure for the quota master target. For now, we only
481 * support the default data (i.e. all OSTs) and metadata (i.e. all the MDTs)
482 * pool which are instantiated in this function.
484 * \param env - is the environment passed by the caller
485 * \param qmt - is the quota master target for which we have to initialize the
488 * \retval - 0 on success, appropriate error on failure
490 int qmt_pool_init(const struct lu_env *env, struct qmt_device *qmt)
495 INIT_LIST_HEAD(&qmt->qmt_pool_list);
496 init_rwsem(&qmt->qmt_pool_lock);
498 /* Instantiate pool master for the default data and metadata pool.
499 * This code will have to be revisited once we support quota on
500 * non-default pools */
501 for (res = LQUOTA_FIRST_RES; res < LQUOTA_LAST_RES; res++) {
502 rc = qmt_pool_alloc(env, qmt, GLB_POOL_NAME, res);
508 qmt_pool_fini(env, qmt);
513 static int qmt_slv_cnt(const struct lu_env *env, struct lu_fid *glb_fid,
514 char *slv_name, struct lu_fid *slv_fid, void *arg)
516 struct obd_uuid uuid;
517 int (*nr)[QMT_STYPE_CNT][LL_MAXQUOTAS] = arg;
521 rc = lquota_extract_fid(glb_fid, NULL, &qtype);
524 obd_str2uuid(&uuid, slv_name);
525 stype = qmt_uuid2idx(&uuid, NULL);
529 (*nr)[stype][qtype]++;
530 CDEBUG(D_QUOTA, "slv_name %s stype %d qtype %d nr %d\n",
531 slv_name, stype, qtype, (*nr)[stype][qtype]);
537 * Set up on-disk index files associated with each pool.
539 * \param env - is the environment passed by the caller
540 * \param qmt - is the quota master target for which we have to initialize the
542 * \param qmt_root - is the on-disk directory created for the QMT.
543 * \param name - is the pool name that we need to setup. Setup all pools
544 * in qmt_pool_list when name is NULL.
546 * \retval - 0 on success, appropriate error on failure
548 int qmt_pool_prepare(const struct lu_env *env, struct qmt_device *qmt,
549 struct dt_object *qmt_root, char *name)
551 struct qmt_thread_info *qti = qmt_info(env);
552 struct lquota_glb_rec *rec = &qti->qti_glb_rec;
553 struct qmt_pool_info *pool;
554 struct dt_device *dev = NULL;
555 dt_obj_version_t version;
556 struct list_head *pos;
557 int rc = 0, i, qtype;
560 /* iterate over each pool in the list and allocate a quota site for each
561 * one. This involves creating a global index file on disk */
562 list_for_each(pos, &qmt->qmt_pool_list) {
563 struct dt_object *obj;
564 struct lquota_entry *lqe;
568 pool = list_entry(pos, struct qmt_pool_info,
571 pool_name = pool->qpi_name;
572 if (name && strncmp(pool_name, name, LOV_MAXPOOLNAME))
574 rtype = pool->qpi_rtype;
576 dev = pool->qpi_qmt->qmt_child;
578 /* allocate directory for this pool */
579 snprintf(qti->qti_buf, LQUOTA_NAME_MAX, "%s-%s",
580 RES_NAME(rtype), pool_name);
581 obj = lquota_disk_dir_find_create(env, qmt->qmt_child, qmt_root,
584 RETURN(PTR_ERR(obj));
585 pool->qpi_root = obj;
587 for (qtype = 0; qtype < LL_MAXQUOTAS; qtype++) {
588 /* Generating FID of global index in charge of storing
589 * settings for this quota type */
590 lquota_generate_fid(&qti->qti_fid, rtype, qtype);
592 /* open/create the global index file for this quota
593 * type. If name is set, it means we came here from
594 * qmt_pool_new and can create glb index with a
595 * local generated FID. */
596 obj = lquota_disk_glb_find_create(env, dev,
599 name ? true : false);
602 CERROR("%s: failed to create glb index copy for %s type: rc = %d\n",
603 qmt->qmt_svname, qtype_name(qtype), rc);
607 pool->qpi_glb_obj[qtype] = obj;
609 version = dt_version_get(env, obj);
610 /* set default grace time for newly created index */
612 rec->qbr_hardlimit = 0;
613 rec->qbr_softlimit = 0;
614 rec->qbr_granted = 0;
615 rec->qbr_time = rtype == LQUOTA_RES_MD ?
616 MAX_IQ_TIME : MAX_DQ_TIME;
618 rc = lquota_disk_write_glb(env, obj, 0, rec);
620 CERROR("%s: failed to set default grace time for %s type: rc = %d\n",
621 qmt->qmt_svname, qtype_name(qtype), rc);
625 rc = lquota_disk_update_ver(env, dev, obj, 1);
627 CERROR("%s: failed to set initial version for %s type: rc = %d\n",
628 qmt->qmt_svname, qtype_name(qtype), rc);
633 /* create quota entry site for this quota type */
634 pool->qpi_site[qtype] = lquota_site_alloc(env, pool,
637 if (IS_ERR(pool->qpi_site[qtype])) {
638 rc = PTR_ERR(pool->qpi_site[qtype]);
639 CERROR("%s: failed to create site for %s type: rc = %d\n",
640 qmt->qmt_svname, qtype_name(qtype), rc);
644 /* count number of slaves which already connected to
645 * the master in the past */
646 for (i = 0; i < QMT_STYPE_CNT; i++)
647 pool->qpi_slv_nr[i][qtype] = 0;
649 rc = lquota_disk_for_each_slv(env, pool->qpi_root,
654 CERROR("%s: failed to scan & count slave indexes for %s type: rc = %d\n",
655 qmt->qmt_svname, qtype_name(qtype), rc);
659 /* Global grace time is stored in quota settings of
661 qti->qti_id.qid_uid = 0;
663 /* look-up quota entry storing grace time */
664 lqe = lqe_locate(env, pool->qpi_site[qtype],
667 RETURN(PTR_ERR(lqe));
668 pool->qpi_grace_lqe[qtype] = lqe;
669 #ifdef CONFIG_PROC_FS
670 /* add procfs file to dump the global index, mostly for
671 * debugging purpose */
672 snprintf(qti->qti_buf, MTI_NAME_MAXLEN,
673 "glb-%s", qtype_name(qtype));
674 rc = lprocfs_seq_create(pool->qpi_proc, qti->qti_buf,
675 0444, &lprocfs_quota_seq_fops,
678 CWARN("%s: Error adding procfs file for global quota index "DFID": rc = %d\n",
679 qmt->qmt_svname, PFID(&qti->qti_fid), rc);
682 set_bit(QPI_FLAG_STATE_INITED, &pool->qpi_flags);
691 * Handle new slave connection. Called when a slave enqueues the global quota
692 * lock at the beginning of the reintegration procedure.
694 * \param env - is the environment passed by the caller
695 * \parap qmt - is the quota master target handling this request
696 * \param glb_fid - is the fid of the global index file
697 * \param slv_fid - is the fid of the newly created slave index file
698 * \param slv_ver - is the current version of the slave index file
699 * \param uuid - is the uuid of slave which is (re)connecting to the master
702 * \retval - 0 on success, appropriate error on failure
704 int qmt_pool_new_conn(const struct lu_env *env, struct qmt_device *qmt,
705 struct lu_fid *glb_fid, struct lu_fid *slv_fid,
706 __u64 *slv_ver, struct obd_uuid *uuid)
708 struct qmt_pool_info *pool;
709 struct dt_object *slv_obj;
710 int pool_type, qtype, stype;
711 bool created = false;
714 stype = qmt_uuid2idx(uuid, &idx);
718 /* extract pool info from global index FID */
719 rc = lquota_extract_fid(glb_fid, &pool_type, &qtype);
723 /* look-up pool in charge of this global index FID */
725 pool = qmt_pool_lookup_arr(env, qmt, pool_type, idx);
727 RETURN(PTR_ERR(pool));
729 /* look-up slave index file */
730 slv_obj = lquota_disk_slv_find(env, qmt->qmt_child, pool->qpi_root,
732 if (IS_ERR(slv_obj) && PTR_ERR(slv_obj) == -ENOENT) {
733 /* create slave index file */
734 slv_obj = lquota_disk_slv_find_create(env, qmt->qmt_child,
735 pool->qpi_root, glb_fid,
739 if (IS_ERR(slv_obj)) {
740 rc = PTR_ERR(slv_obj);
741 CERROR("%s: failed to create quota slave index file for %s (%d)"
742 "\n", qmt->qmt_svname, obd_uuid2str(uuid), rc);
746 /* retrieve slave fid & current object version */
747 memcpy(slv_fid, lu_object_fid(&slv_obj->do_lu), sizeof(*slv_fid));
748 *slv_ver = dt_version_get(env, slv_obj);
749 dt_object_put(env, slv_obj);
751 for (i = 0; i < qti_pools_cnt(env); i++)
752 qti_pools_env(env)[i]->qpi_slv_nr[stype][qtype]++;
759 * Look-up a lquota_entry in the pool hash and allocate it if not found.
761 * \param env - is the environment passed by the caller
762 * \param qmt - is the quota master target for which we have to initialize the
764 * \param pool_type - is the pool type, either LQUOTA_RES_MD or LQUOTA_RES_DT.
765 * \param qtype - is the quota type, either user or group.
766 * \param qid - is the quota ID to look-up
768 * \retval - valid pointer to lquota entry on success, appropriate error on
771 struct lquota_entry *qmt_pool_lqe_lookup(const struct lu_env *env,
772 struct qmt_device *qmt,
773 int pool_type, int qtype,
774 union lquota_id *qid,
777 struct qmt_pool_info *pool;
778 struct lquota_entry *lqe;
781 /* look-up pool responsible for this global index FID */
782 pool = qmt_pool_lookup_name(env, qmt, pool_type, pool_name);
784 RETURN(ERR_CAST(pool));
786 if (qid->qid_uid == 0) {
787 /* caller wants to access grace time, no need to look up the
788 * entry since we keep a reference on ID 0 all the time */
789 lqe = pool->qpi_grace_lqe[qtype];
794 /* now that we have the pool, let's look-up the quota entry in the
795 * right quota site */
796 lqe = lqe_locate(env, pool->qpi_site[qtype], qid);
798 qpi_putref(env, pool);
802 int qmt_pool_lqes_lookup(const struct lu_env *env,
803 struct qmt_device *qmt,
804 int rtype, int stype,
805 int qtype, union lquota_id *qid,
806 char *pool_name, int idx)
808 struct qmt_pool_info *pool;
809 struct lquota_entry *lqe;
813 /* Until MDT pools are not emplemented, all MDTs belong to
814 * global pool, thus lookup lqes only from global pool. */
815 if (qmt_dom(rtype, stype))
820 /* look-up pool responsible for this global index FID */
821 pool = qmt_pool_lookup_arr(env, qmt, rtype, idx);
824 RETURN(PTR_ERR(pool));
827 /* now that we have the pool, let's look-up the quota entry in the
828 * right quota site */
830 for (i = 0; i < qti_pools_cnt(env); i++) {
831 pool = qti_pools_env(env)[i];
832 lqe = lqe_locate(env, pool->qpi_site[qtype], qid);
835 GOTO(out, rc = PTR_ERR(lqe));
837 qti_lqes_add(env, lqe);
839 LASSERT(qti_lqes_glbl(env)->lqe_is_global);
846 static int lqes_cmp(const void *arg1, const void *arg2)
848 const struct lquota_entry *lqe1, *lqe2;
850 lqe1 = *(const struct lquota_entry **)arg1;
851 lqe2 = *(const struct lquota_entry **)arg2;
852 if (lqe1->lqe_qunit > lqe2->lqe_qunit)
854 if (lqe1->lqe_qunit < lqe2->lqe_qunit)
859 void qmt_lqes_sort(const struct lu_env *env)
861 sort(qti_lqes(env), qti_lqes_cnt(env), sizeof(void *), lqes_cmp, NULL);
862 /* global lqe was moved during sorting */
863 if (!qti_lqes_glbl(env)->lqe_is_global) {
865 for (i = 0; i < qti_lqes_cnt(env); i++) {
866 if (qti_lqes(env)[i]->lqe_is_global) {
867 qti_glbl_lqe_idx(env) = i;
874 int qmt_pool_lqes_lookup_spec(const struct lu_env *env, struct qmt_device *qmt,
875 int rtype, int qtype, union lquota_id *qid)
877 struct qmt_pool_info *pos;
878 struct lquota_entry *lqe;
881 down_read(&qmt->qmt_pool_lock);
882 if (list_empty(&qmt->qmt_pool_list)) {
883 up_read(&qmt->qmt_pool_lock);
887 list_for_each_entry(pos, &qmt->qmt_pool_list, qpi_linkage) {
888 if (pos->qpi_rtype != rtype)
890 /* Don't take into account pools without slaves */
891 if (!qpi_slv_nr(pos, qtype))
893 lqe = lqe_find(env, pos->qpi_site[qtype], qid);
894 /* ENOENT is valid case for lqe from non global pool
895 * that hasn't limits, i.e. not enforced. Continue even
896 * in case of error - we can handle already found lqes */
899 if (!lqe->lqe_enforced) {
900 /* no settings for this qid_uid */
904 qti_lqes_add(env, lqe);
905 CDEBUG(D_QUOTA, "adding lqe %p from pool %s\n",
908 up_read(&qmt->qmt_pool_lock);
909 RETURN(qti_lqes_cnt(env) ? 0 : -ENOENT);
913 * Allocate a new pool for the specified device.
915 * Allocate a new pool_desc structure for the specified \a new_pool
916 * device to create a pool with the given \a poolname. The new pool
917 * structure is created with a single reference, and is freed when the
918 * reference count drops to zero.
920 * \param[in] obd Lustre OBD device on which to add a pool iterator
921 * \param[in] poolname the name of the pool to be created
923 * \retval 0 in case of success
924 * \retval negative error code in case of error
926 int qmt_pool_new(struct obd_device *obd, char *poolname)
928 struct qmt_device *qmt = lu2qmt_dev(obd->obd_lu_dev);
929 struct qmt_pool_info *qpi;
934 if (strnlen(poolname, LOV_MAXPOOLNAME + 1) > LOV_MAXPOOLNAME)
935 RETURN(-ENAMETOOLONG);
937 rc = lu_env_init(&env, LCT_MD_THREAD);
939 CERROR("%s: can't init env: rc = %d\n", obd->obd_name, rc);
943 qpi = qmt_pool_lookup_name(&env, qmt, LQUOTA_RES_DT, poolname);
945 /* Valid case when several MDTs are mounted
946 * at the same node. */
947 CDEBUG(D_QUOTA, "pool %s already exists\n", poolname);
948 qpi_putref(&env, qpi);
949 GOTO(out_env, rc = -EEXIST);
951 if (PTR_ERR(qpi) != -ENOENT) {
952 CWARN("%s: pool %s lookup failed: rc = %ld\n",
953 obd->obd_name, poolname, PTR_ERR(qpi));
954 GOTO(out_env, rc = PTR_ERR(qpi));
957 /* Now allocate and prepare only DATA pool.
958 * Further when MDT pools will be ready we need to add
959 * a cycle here and setup pools of both types. Another
960 * approach is to find out pool of which type should be
962 rc = qmt_pool_alloc(&env, qmt, poolname, LQUOTA_RES_DT);
964 CERROR("%s: can't alloc pool %s: rc = %d\n",
965 obd->obd_name, poolname, rc);
969 rc = qmt_pool_prepare(&env, qmt, qmt->qmt_root, poolname);
971 CERROR("%s: can't prepare pool for %s: rc = %d\n",
972 obd->obd_name, poolname, rc);
976 CDEBUG(D_QUOTA, "Quota pool "LOV_POOLNAMEF" added\n",
981 qpi = qmt_pool_lookup_name(&env, qmt, LQUOTA_RES_DT, poolname);
983 qpi_putref(&env, qpi);
984 qpi_putref(&env, qpi);
992 qmt_obj_recalc(const struct lu_env *env, struct dt_object *obj,
993 struct lquota_site *site)
995 struct qmt_thread_info *qti = qmt_info(env);
996 union lquota_id *qid = &qti->qti_id;
997 const struct dt_it_ops *iops;
1004 iops = &obj->do_index_ops->dio_it;
1006 it = iops->init(env, obj, 0);
1008 CWARN("quota: initialize it for "DFID" failed: rc = %ld\n",
1009 PFID(&qti->qti_fid), PTR_ERR(it));
1010 RETURN(PTR_ERR(it));
1013 rc = iops->load(env, it, 0);
1015 CWARN("quota: load first entry for "DFID" failed: rc = %d\n",
1016 PFID(&qti->qti_fid), rc);
1018 } else if (rc == 0) {
1019 rc = iops->next(env, it);
1021 GOTO(out, rc = (rc < 0) ? rc : 0);
1025 struct lquota_entry *lqe;
1027 key = iops->key(env, it);
1029 CWARN("quota: error key for "DFID": rc = %ld\n",
1030 PFID(&qti->qti_fid), PTR_ERR(key));
1031 GOTO(out, rc = PTR_ERR(key));
1034 /* skip the root user/group */
1035 if (*((__u64 *)key) == 0)
1038 qid->qid_uid = *((__u64 *)key);
1040 rc = qmt_slv_read(env, qid, obj, &granted);
1044 lqe = lqe_locate(env, site, qid);
1046 GOTO(out, rc = PTR_ERR(lqe));
1047 lqe_write_lock(lqe);
1048 lqe->lqe_recalc_granted += granted;
1049 lqe_write_unlock(lqe);
1052 rc = iops->next(env, it);
1054 CWARN("quota: failed to parse index "DFID
1055 ", ->next error: rc = %d\n",
1056 PFID(&qti->qti_fid), rc);
1057 } while (rc == 0 && !kthread_should_stop());
1061 iops->fini(env, it);
1065 static int qmt_site_recalc_cb(struct cfs_hash *hs, struct cfs_hash_bd *bd,
1066 struct hlist_node *hnode, void *data)
1068 struct lquota_entry *lqe;
1069 struct lu_env *env = data;
1071 lqe = hlist_entry(hnode, struct lquota_entry, lqe_hash);
1072 LASSERT(atomic_read(&lqe->lqe_ref) > 0);
1074 lqe_write_lock(lqe);
1075 if (lqe->lqe_granted != lqe->lqe_recalc_granted) {
1076 struct qmt_device *qmt = lqe2qpi(lqe)->qpi_qmt;
1078 bool need_notify = false;
1081 LQUOTA_DEBUG(lqe, "lqe_recalc_granted %llu\n",
1082 lqe->lqe_recalc_granted);
1083 lqe->lqe_granted = lqe->lqe_recalc_granted;
1084 /* Always returns true, if there is no slaves in a pool */
1085 need_notify |= qmt_adjust_qunit(env, lqe);
1086 need_notify |= qmt_adjust_edquot(lqe, ktime_get_real_seconds());
1088 /* Find all lqes with lqe_id to reseed lgd array */
1089 rc = qmt_pool_lqes_lookup_spec(env, qmt, lqe_rtype(lqe),
1090 lqe_qtype(lqe), &lqe->lqe_id);
1091 if (!rc && qti_lqes_glbl(env)->lqe_glbl_data) {
1093 qti_lqes_glbl(env)->lqe_glbl_data);
1094 qmt_id_lock_notify(qmt, qti_lqes_glbl(env));
1098 th = dt_trans_create(env, qmt->qmt_child);
1102 rc = lquota_disk_declare_write(env, th,
1108 rc = dt_trans_start_local(env, qmt->qmt_child, th);
1112 qmt_glb_write(env, th, lqe, 0, NULL);
1114 dt_trans_stop(env, qmt->qmt_child, th);
1117 lqe->lqe_recalc_granted = 0;
1118 lqe_write_unlock(lqe);
1123 #define MDT_DEV_NAME_LEN (LUSTRE_MAXFSNAME + sizeof("-MDT0000"))
1124 static struct obd_device *qmt_get_mgc(struct qmt_device *qmt)
1126 char mdt_name[MDT_DEV_NAME_LEN];
1127 struct lustre_mount_info *lmi;
1128 struct obd_device *obd;
1132 rc = server_name2fsname(qmt->qmt_svname, mdt_name, NULL);
1134 CERROR("quota: cannot get server name from %s: rc = %d\n",
1135 qmt->qmt_svname, rc);
1136 RETURN(ERR_PTR(rc));
1139 strlcat(mdt_name, "-MDT0000", MDT_DEV_NAME_LEN);
1140 lmi = server_get_mount(mdt_name);
1143 CERROR("%s: cannot get mount info from %s: rc = %d\n",
1144 qmt->qmt_svname, mdt_name, rc);
1145 RETURN(ERR_PTR(rc));
1147 obd = s2lsi(lmi->lmi_sb)->lsi_mgc;
1148 lustre_put_lsi(lmi->lmi_sb);
1153 static int qmt_pool_recalc(void *args)
1155 struct qmt_pool_info *pool, *glbl_pool;
1156 struct rw_semaphore *sem = NULL;
1157 struct obd_device *obd;
1159 int i, rc, qtype, slaves_cnt;
1164 rc = lu_env_init(&env, LCT_MD_THREAD);
1166 CERROR("%s: cannot init env: rc = %d\n",
1167 pool->qpi_qmt->qmt_svname, rc);
1171 obd = qmt_get_mgc(pool->qpi_qmt);
1173 GOTO(out, rc = PTR_ERR(obd));
1175 /* Waiting for the end of processing mgs config.
1176 * It is needed to be sure all pools are configured. */
1177 while (obd->obd_process_conf)
1178 schedule_timeout_uninterruptible(cfs_time_seconds(1));
1180 OBD_FAIL_TIMEOUT(OBD_FAIL_QUOTA_RECALC, cfs_fail_val);
1181 sem = qmt_sarr_rwsem(pool);
1184 /* Hold this to be sure that OSTs from this pool
1185 * can't do acquire/release.
1187 * I guess below write semaphore could be a bottleneck
1188 * as qmt_dqacq would be blocked trying to hold
1189 * read_lock at qmt_pool_lookup->qti_pools_add.
1190 * But on the other hand adding/removing OSTs to the pool is
1191 * a rare operation. If finally this would be a problem,
1192 * we can consider another approach. For example we can
1193 * iterate through the POOL's lqes. Take lqe, hold lqe_write_lock
1194 * and go through appropriate OSTs. I don't use this approach now
1195 * as newly created pool hasn't lqes entries. So firstly we need
1196 * to get this lqes from the global pool index file. This
1197 * solution looks more complex, so leave it as it is. */
1198 down_write(&pool->qpi_recalc_sem);
1200 glbl_pool = qmt_pool_lookup_glb(&env, pool->qpi_qmt, pool->qpi_rtype);
1201 if (IS_ERR(glbl_pool))
1202 GOTO(out, rc = PTR_ERR(glbl_pool));
1204 slaves_cnt = qmt_sarr_count(pool);
1205 CDEBUG(D_QUOTA, "Starting pool recalculation for %d slaves in %s\n",
1206 slaves_cnt, pool->qpi_name);
1208 for (qtype = 0; qtype < LL_MAXQUOTAS; qtype++) {
1209 for (i = 0; i < slaves_cnt; i++) {
1210 struct qmt_thread_info *qti = qmt_info(&env);
1211 struct dt_object *slv_obj;
1212 struct obd_uuid uuid;
1215 if (kthread_should_stop())
1216 GOTO(out_stop, rc = 0);
1217 idx = qmt_sarr_get_idx(pool, i);
1220 /* We don't need fsname here - anyway
1221 * lquota_disk_slv_filename ignores it. */
1222 snprintf(uuid.uuid, UUID_MAX, "-OST%04x_UUID", idx);
1223 lquota_generate_fid(&qti->qti_fid, pool->qpi_rtype,
1225 /* look-up index file associated with acquiring slave */
1226 slv_obj = lquota_disk_slv_find(&env,
1227 glbl_pool->qpi_qmt->qmt_child,
1228 glbl_pool->qpi_root,
1231 if (IS_ERR(slv_obj))
1232 GOTO(out_stop, rc = PTR_ERR(slv_obj));
1234 CDEBUG(D_QUOTA, "slv_obj is found %p for uuid %s\n",
1235 slv_obj, uuid.uuid);
1236 qmt_obj_recalc(&env, slv_obj, pool->qpi_site[qtype]);
1237 dt_object_put(&env, slv_obj);
1239 /* Now go trough the site hash and compare lqe_granted
1240 * with lqe_calc_granted. Write new value if disagree */
1242 cfs_hash_for_each(pool->qpi_site[qtype]->lqs_hash,
1243 qmt_site_recalc_cb, &env);
1247 qpi_putref(&env, glbl_pool);
1249 if (xchg(&pool->qpi_recalc_task, NULL) == NULL)
1251 * Someone is waiting for us to stop - be sure not to exit
1252 * before kthread_stop() gets a ref on the task. No event
1253 * will happen on 'pool, this is just a convenient way to
1256 wait_var_event(pool, kthread_should_stop());
1258 clear_bit(QPI_FLAG_RECALC_OFFSET, &pool->qpi_flags);
1259 /* Pool can't be changed, since sem has been down.
1260 * Thus until up_read, no one can restart recalc thread.
1264 up_write(&pool->qpi_recalc_sem);
1267 /* qpi_getref has been called in qmt_start_pool_recalc,
1268 * however we can't call qpi_putref if lu_env_init failed.
1270 if (env.le_ctx.lc_state == LCS_ENTERED) {
1271 qpi_putref(&env, pool);
1278 static int qmt_start_pool_recalc(struct lu_env *env, struct qmt_pool_info *qpi)
1280 struct task_struct *task;
1283 if (!test_and_set_bit(QPI_FLAG_RECALC_OFFSET, &qpi->qpi_flags)) {
1284 LASSERT(!qpi->qpi_recalc_task);
1287 task = kthread_create(qmt_pool_recalc, qpi,
1288 "qsd_reint_%s", qpi->qpi_name);
1290 clear_bit(QPI_FLAG_RECALC_OFFSET, &qpi->qpi_flags);
1292 qpi_putref(env, qpi);
1294 qpi->qpi_recalc_task = task;
1295 /* Using park/unpark to start the thread ensures that
1296 * the thread function does get calls, so the
1297 * ref on qpi will be dropped
1300 kthread_unpark(task);
1307 static inline void qmt_stop_pool_recalc(struct qmt_pool_info *qpi)
1309 struct task_struct *task;
1311 task = xchg(&qpi->qpi_recalc_task, NULL);
1316 static int qmt_pool_slv_nr_change(const struct lu_env *env,
1317 struct qmt_pool_info *pool,
1320 struct qmt_pool_info *glbl_pool;
1323 glbl_pool = qmt_pool_lookup_glb(env, pool->qpi_qmt, LQUOTA_RES_DT);
1324 if (IS_ERR(glbl_pool))
1325 RETURN(PTR_ERR(glbl_pool));
1327 for (qtype = 0; qtype < LL_MAXQUOTAS; qtype++) {
1328 struct qmt_thread_info *qti = qmt_info(env);
1329 struct dt_object *slv_obj;
1330 struct obd_uuid uuid;
1332 /* We don't need fsname here - anyway
1333 * lquota_disk_slv_filename ignores it. */
1334 snprintf(uuid.uuid, UUID_MAX, "-OST%04x_UUID", idx);
1335 lquota_generate_fid(&qti->qti_fid, pool->qpi_rtype,
1337 /* look-up index file associated with acquiring slave */
1338 slv_obj = lquota_disk_slv_find(env,
1339 glbl_pool->qpi_qmt->qmt_child,
1340 glbl_pool->qpi_root,
1343 if (IS_ERR(slv_obj))
1347 pool->qpi_slv_nr[QMT_STYPE_OST][qtype]++;
1349 pool->qpi_slv_nr[QMT_STYPE_OST][qtype]--;
1350 dt_object_put(env, slv_obj);
1352 qpi_putref(env, glbl_pool);
1357 static int qmt_pool_add_rem(struct obd_device *obd, char *poolname,
1358 char *slavename, bool add)
1360 struct qmt_device *qmt = lu2qmt_dev(obd->obd_lu_dev);
1361 struct qmt_pool_info *qpi;
1366 if (qmt->qmt_stopping)
1369 if (strnlen(poolname, LOV_MAXPOOLNAME + 1) > LOV_MAXPOOLNAME)
1370 RETURN(-ENAMETOOLONG);
1372 CDEBUG(D_QUOTA, add ? "%s: pool %s, adding %s\n" :
1373 "%s: pool %s, removing %s\n",
1374 obd->obd_name, poolname, slavename);
1376 rc = server_name2index(slavename, &idx, NULL);
1377 if (rc != LDD_F_SV_TYPE_OST)
1380 rc = lu_env_init(&env, LCT_MD_THREAD);
1382 CERROR("%s: cannot init env: rc = %d\n", obd->obd_name, rc);
1386 qpi = qmt_pool_lookup_name(&env, qmt, LQUOTA_RES_DT, poolname);
1388 CWARN("%s: can't find pool %s: rc = %long\n",
1389 obd->obd_name, poolname, PTR_ERR(qpi));
1390 GOTO(out, rc = PTR_ERR(qpi));
1393 rc = add ? qmt_sarr_pool_add(qpi, idx, 32) :
1394 qmt_sarr_pool_rem(qpi, idx);
1396 /* message is checked in sanity-quota test_1b */
1397 CERROR("%s: can't %s %s pool '%s': rc = %d\n",
1398 obd->obd_name, add ? "add to" : "remove", slavename,
1400 GOTO(out_putref, rc);
1402 qmt_pool_slv_nr_change(&env, qpi, idx, add);
1403 qmt_start_pool_recalc(&env, qpi);
1406 qpi_putref(&env, qpi);
1415 * Add a single target device to the named pool.
1417 * \param[in] obd OBD device on which to add the pool
1418 * \param[in] poolname name of the pool to which to add the target \a slavename
1419 * \param[in] slavename name of the target device to be added
1421 * \retval 0 if \a slavename was (previously) added to the pool
1422 * \retval negative error number on failure
1424 int qmt_pool_add(struct obd_device *obd, char *poolname, char *slavename)
1426 return qmt_pool_add_rem(obd, poolname, slavename, true);
1430 * Remove the named target from the specified pool.
1432 * \param[in] obd OBD device from which to remove \a poolname
1433 * \param[in] poolname name of the pool to be changed
1434 * \param[in] slavename name of the target to remove from \a poolname
1436 * \retval 0 on successfully removing \a slavename from the pool
1437 * \retval negative number on error (e.g. \a slavename not in pool)
1439 int qmt_pool_rem(struct obd_device *obd, char *poolname, char *slavename)
1441 return qmt_pool_add_rem(obd, poolname, slavename, false);
1445 * Remove the named pool from the QMT device.
1447 * \param[in] obd OBD device on which pool was previously created
1448 * \param[in] poolname name of pool to remove from \a obd
1450 * \retval 0 on successfully removing the pool
1451 * \retval negative error numbers for failures
1453 int qmt_pool_del(struct obd_device *obd, char *poolname)
1455 struct qmt_device *qmt = lu2qmt_dev(obd->obd_lu_dev);
1456 struct qmt_pool_info *qpi;
1458 char buf[LQUOTA_NAME_MAX];
1464 if (strnlen(poolname, LOV_MAXPOOLNAME + 1) > LOV_MAXPOOLNAME)
1465 RETURN(-ENAMETOOLONG);
1467 CDEBUG(D_QUOTA, "Removing quota pool "LOV_POOLNAMEF"\n",
1470 rc = lu_env_init(&env, LCT_MD_THREAD);
1472 CERROR("%s: cannot init env: rc = %d\n", obd->obd_name, rc);
1476 /* look-up pool in charge of this global index FID */
1477 qpi = qmt_pool_lookup_name(&env, qmt, LQUOTA_RES_DT, poolname);
1479 /* Valid case for several MDTs at the same node -
1480 * pool removed by the 1st MDT in config */
1481 CDEBUG(D_QUOTA, "Cannot find pool %s\n", poolname);
1483 RETURN(PTR_ERR(qpi));
1486 for (qtype = 0; qtype < LL_MAXQUOTAS; qtype++) {
1487 lquota_generate_fid(&fid, LQUOTA_RES_DT, qtype);
1488 snprintf(buf, LQUOTA_NAME_MAX, "0x%x", fid.f_oid);
1489 rc = local_object_unlink(&env, qmt->qmt_child,
1490 qpi->qpi_root, buf);
1492 CWARN("%s: cannot unlink %s from pool %s: rc = %d\n",
1493 obd->obd_name, buf, poolname, rc);
1496 /* put ref from look-up */
1497 qpi_putref(&env, qpi);
1498 /* put last ref to free qpi */
1499 qpi_putref(&env, qpi);
1501 snprintf(buf, LQUOTA_NAME_MAX, "%s-%s",
1502 RES_NAME(LQUOTA_RES_DT), poolname);
1503 rc = local_object_unlink(&env, qmt->qmt_child, qmt->qmt_root, buf);
1505 CWARN("%s: cannot unlink dir %s: rc = %d\n",
1506 obd->obd_name, poolname, rc);
1512 static inline int qmt_sarr_pool_init(struct qmt_pool_info *qpi)
1515 /* No need to initialize sarray for global pool
1516 * as it always includes all slaves */
1517 if (qmt_pool_global(qpi))
1520 switch (qpi->qpi_rtype) {
1522 return lu_tgt_pool_init(&qpi->qpi_sarr.osts, 0);
1529 static inline int qmt_sarr_pool_add(struct qmt_pool_info *qpi, int idx, int min)
1531 switch (qpi->qpi_rtype) {
1533 return lu_tgt_pool_add(&qpi->qpi_sarr.osts, idx, min);
1540 static inline int qmt_sarr_pool_rem(struct qmt_pool_info *qpi, int idx)
1542 switch (qpi->qpi_rtype) {
1544 return lu_tgt_pool_remove(&qpi->qpi_sarr.osts, idx);
1551 static inline void qmt_sarr_pool_free(struct qmt_pool_info *qpi)
1553 if (qmt_pool_global(qpi))
1556 switch (qpi->qpi_rtype) {
1558 if (qpi->qpi_sarr.osts.op_array)
1559 lu_tgt_pool_free(&qpi->qpi_sarr.osts);
1567 static inline int qmt_sarr_check_idx(struct qmt_pool_info *qpi, int idx)
1569 if (qmt_pool_global(qpi))
1572 switch (qpi->qpi_rtype) {
1574 return lu_tgt_check_index(idx, &qpi->qpi_sarr.osts);
1581 struct rw_semaphore *qmt_sarr_rwsem(struct qmt_pool_info *qpi)
1583 switch (qpi->qpi_rtype) {
1585 /* to protect ost_pool use */
1586 return &qpi->qpi_sarr.osts.op_rw_sem;
1593 int qmt_sarr_get_idx(struct qmt_pool_info *qpi, int arr_idx)
1596 if (qmt_pool_global(qpi))
1599 switch (qpi->qpi_rtype) {
1601 LASSERTF(arr_idx < qpi->qpi_sarr.osts.op_count && arr_idx >= 0,
1602 "idx invalid %d op_count %d\n", arr_idx,
1603 qpi->qpi_sarr.osts.op_count);
1604 return qpi->qpi_sarr.osts.op_array[arr_idx];
1611 /* Number of slaves in a pool */
1612 unsigned int qmt_sarr_count(struct qmt_pool_info *qpi)
1614 switch (qpi->qpi_rtype) {
1616 return qpi->qpi_sarr.osts.op_count;