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,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License version 2 for more details. A copy is
14 * included in the COPYING 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, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2017, Intel Corporation.
29 * lustre/lod/lod_lov.c
31 * A set of helpers to maintain Logical Object Volume (LOV)
32 * Extended Attribute (EA) and known OST targets
34 * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
37 #define DEBUG_SUBSYSTEM S_MDS
39 #include <obd_class.h>
40 #include <lustre_lfsck.h>
41 #include <lustre_lmv.h>
42 #include <lustre_swab.h>
44 #include "lod_internal.h"
47 * Increase reference count on the target table.
49 * Increase reference count on the target table usage to prevent racing with
50 * addition/deletion. Any function that expects the table to remain
51 * stationary must take a ref.
53 * \param[in] ltd target table (lod_ost_descs or lod_mdt_descs)
55 void lod_getref(struct lod_tgt_descs *ltd)
57 down_read(<d->ltd_rw_sem);
58 mutex_lock(<d->ltd_mutex);
60 mutex_unlock(<d->ltd_mutex);
64 * Decrease reference count on the target table.
66 * Companion of lod_getref() to release a reference on the target table.
67 * If this is the last reference and the OST entry was scheduled for deletion,
68 * the descriptor is removed from the table.
70 * \param[in] lod LOD device from which we release a reference
71 * \param[in] ltd target table (lod_ost_descs or lod_mdt_descs)
73 void lod_putref(struct lod_device *lod, struct lod_tgt_descs *ltd)
75 mutex_lock(<d->ltd_mutex);
77 if (ltd->ltd_refcount == 0 && ltd->ltd_death_row) {
78 struct lod_tgt_desc *tgt_desc, *tmp;
79 struct list_head kill;
82 CDEBUG(D_CONFIG, "destroying %d ltd desc\n",
85 INIT_LIST_HEAD(&kill);
87 cfs_foreach_bit(ltd->ltd_tgt_bitmap, idx) {
88 tgt_desc = LTD_TGT(ltd, idx);
91 if (!tgt_desc->ltd_reap)
94 list_add(&tgt_desc->ltd_kill, &kill);
95 LTD_TGT(ltd, idx) = NULL;
96 /*FIXME: only support ost pool for now */
97 if (ltd == &lod->lod_ost_descs) {
98 lod_ost_pool_remove(&lod->lod_pool_info, idx);
99 if (tgt_desc->ltd_active)
100 lod->lod_desc.ld_active_tgt_count--;
103 cfs_bitmap_clear(ltd->ltd_tgt_bitmap, idx);
104 ltd->ltd_death_row--;
106 mutex_unlock(<d->ltd_mutex);
107 up_read(<d->ltd_rw_sem);
109 list_for_each_entry_safe(tgt_desc, tmp, &kill, ltd_kill) {
111 list_del(&tgt_desc->ltd_kill);
112 if (ltd == &lod->lod_ost_descs) {
113 /* remove from QoS structures */
114 rc = lqos_del_tgt(&lod->lod_qos, tgt_desc);
116 CERROR("%s: qos_del_tgt(%s) failed:"
118 lod2obd(lod)->obd_name,
119 obd_uuid2str(&tgt_desc->ltd_uuid),
122 rc = obd_disconnect(tgt_desc->ltd_exp);
124 CERROR("%s: failed to disconnect %s: rc = %d\n",
125 lod2obd(lod)->obd_name,
126 obd_uuid2str(&tgt_desc->ltd_uuid), rc);
127 OBD_FREE_PTR(tgt_desc);
130 mutex_unlock(<d->ltd_mutex);
131 up_read(<d->ltd_rw_sem);
136 * Expand size of target table.
138 * When the target table is full, we have to extend the table. To do so,
139 * we allocate new memory with some reserve, move data from the old table
140 * to the new one and release memory consumed by the old table.
141 * Notice we take ltd_rw_sem exclusively to ensure atomic switch.
143 * \param[in] ltd target table
144 * \param[in] newsize new size of the table
146 * \retval 0 on success
147 * \retval -ENOMEM if reallocation failed
149 static int ltd_bitmap_resize(struct lod_tgt_descs *ltd, __u32 newsize)
151 struct cfs_bitmap *new_bitmap, *old_bitmap = NULL;
155 /* grab write reference on the lod. Relocating the array requires
156 * exclusive access */
158 down_write(<d->ltd_rw_sem);
159 if (newsize <= ltd->ltd_tgts_size)
160 /* someone else has already resize the array */
163 /* allocate new bitmap */
164 new_bitmap = CFS_ALLOCATE_BITMAP(newsize);
166 GOTO(out, rc = -ENOMEM);
168 if (ltd->ltd_tgts_size > 0) {
169 /* the bitmap already exists, we need
170 * to copy data from old one */
171 cfs_bitmap_copy(new_bitmap, ltd->ltd_tgt_bitmap);
172 old_bitmap = ltd->ltd_tgt_bitmap;
175 ltd->ltd_tgts_size = newsize;
176 ltd->ltd_tgt_bitmap = new_bitmap;
179 CFS_FREE_BITMAP(old_bitmap);
181 CDEBUG(D_CONFIG, "tgt size: %d\n", ltd->ltd_tgts_size);
185 up_write(<d->ltd_rw_sem);
190 * Connect LOD to a new OSP and add it to the target table.
192 * Connect to the OSP device passed, initialize all the internal
193 * structures related to the device and add it to the target table.
195 * \param[in] env execution environment for this thread
196 * \param[in] lod LOD device to be connected to the new OSP
197 * \param[in] osp name of OSP device name to be added
198 * \param[in] index index of the new target
199 * \param[in] gen target's generation number
200 * \param[in] tgt_index OSP's group
201 * \param[in] type type of device (mdc or osc)
202 * \param[in] active state of OSP: 0 - inactive, 1 - active
204 * \retval 0 if added successfully
205 * \retval negative error number on failure
207 int lod_add_device(const struct lu_env *env, struct lod_device *lod,
208 char *osp, unsigned index, unsigned gen, int tgt_index,
209 char *type, int active)
211 struct obd_connect_data *data = NULL;
212 struct obd_export *exp = NULL;
213 struct obd_device *obd;
214 struct lu_device *lu_dev;
215 struct dt_device *dt_dev;
217 struct lod_tgt_desc *tgt_desc;
218 struct lod_tgt_descs *ltd;
219 struct lustre_cfg *lcfg;
220 struct obd_uuid obd_uuid;
223 bool connected = false;
226 CDEBUG(D_CONFIG, "osp:%s idx:%d gen:%d\n", osp, index, gen);
229 CERROR("request to add OBD %s with invalid generation: %d\n",
234 obd_str2uuid(&obd_uuid, osp);
236 obd = class_find_client_obd(&obd_uuid, LUSTRE_OSP_NAME,
237 &lod->lod_dt_dev.dd_lu_dev.ld_obd->obd_uuid);
239 CERROR("can't find %s device\n", osp);
243 LASSERT(obd->obd_lu_dev != NULL);
244 LASSERT(obd->obd_lu_dev->ld_site == lod->lod_dt_dev.dd_lu_dev.ld_site);
246 lu_dev = obd->obd_lu_dev;
247 dt_dev = lu2dt_dev(lu_dev);
251 GOTO(out_cleanup, rc = -ENOMEM);
253 data->ocd_connect_flags = OBD_CONNECT_INDEX | OBD_CONNECT_VERSION;
254 data->ocd_version = LUSTRE_VERSION_CODE;
255 data->ocd_index = index;
257 if (strcmp(LUSTRE_OSC_NAME, type) == 0) {
259 data->ocd_connect_flags |= OBD_CONNECT_AT |
262 #ifdef HAVE_LRU_RESIZE_SUPPORT
263 OBD_CONNECT_LRU_RESIZE |
266 OBD_CONNECT_REQPORTAL |
267 OBD_CONNECT_SKIP_ORPHAN |
269 OBD_CONNECT_LVB_TYPE |
270 OBD_CONNECT_VERSION |
271 OBD_CONNECT_PINGLESS |
273 OBD_CONNECT_BULK_MBITS;
275 data->ocd_group = tgt_index;
276 ltd = &lod->lod_ost_descs;
278 struct obd_import *imp = obd->u.cli.cl_import;
281 data->ocd_ibits_known = MDS_INODELOCK_UPDATE;
282 data->ocd_connect_flags |= OBD_CONNECT_ACL |
284 OBD_CONNECT_MDS_MDS |
289 OBD_CONNECT_BULK_MBITS;
290 spin_lock(&imp->imp_lock);
291 imp->imp_server_timeout = 1;
292 spin_unlock(&imp->imp_lock);
293 imp->imp_client->cli_request_portal = OUT_PORTAL;
294 CDEBUG(D_OTHER, "%s: Set 'mds' portal and timeout\n",
296 ltd = &lod->lod_mdt_descs;
299 rc = obd_connect(env, &exp, obd, &obd->obd_uuid, data, NULL);
302 CERROR("%s: cannot connect to next dev %s (%d)\n",
303 obd->obd_name, osp, rc);
304 GOTO(out_cleanup, rc);
308 /* Allocate ost descriptor and fill it */
309 OBD_ALLOC_PTR(tgt_desc);
311 GOTO(out_cleanup, rc = -ENOMEM);
313 tgt_desc->ltd_tgt = dt_dev;
314 tgt_desc->ltd_exp = exp;
315 tgt_desc->ltd_uuid = obd->u.cli.cl_target_uuid;
316 tgt_desc->ltd_gen = gen;
317 tgt_desc->ltd_index = index;
318 tgt_desc->ltd_active = active;
321 if (index >= ltd->ltd_tgts_size) {
322 /* we have to increase the size of the lod_osts array */
325 newsize = max(ltd->ltd_tgts_size, (__u32)2);
326 while (newsize < index + 1)
327 newsize = newsize << 1;
329 /* lod_bitmap_resize() needs lod_rw_sem
330 * which we hold with th reference */
331 lod_putref(lod, ltd);
333 rc = ltd_bitmap_resize(ltd, newsize);
340 mutex_lock(<d->ltd_mutex);
342 if (cfs_bitmap_check(ltd->ltd_tgt_bitmap, index)) {
343 CERROR("%s: device %d is registered already\n", obd->obd_name,
345 GOTO(out_mutex, rc = -EEXIST);
348 if (ltd->ltd_tgt_idx[index / TGT_PTRS_PER_BLOCK] == NULL) {
349 OBD_ALLOC_PTR(ltd->ltd_tgt_idx[index / TGT_PTRS_PER_BLOCK]);
350 if (ltd->ltd_tgt_idx[index / TGT_PTRS_PER_BLOCK] == NULL) {
351 CERROR("can't allocate index to add %s\n",
353 GOTO(out_mutex, rc = -ENOMEM);
358 /* pool and qos are not supported for MDS stack yet */
359 rc = lod_ost_pool_add(&lod->lod_pool_info, index,
362 CERROR("%s: can't set up pool, failed with %d\n",
367 rc = lqos_add_tgt(&lod->lod_qos, tgt_desc);
369 CERROR("%s: qos_add_tgt failed with %d\n",
374 /* The new OST is now a full citizen */
375 if (index >= lod->lod_desc.ld_tgt_count)
376 lod->lod_desc.ld_tgt_count = index + 1;
378 lod->lod_desc.ld_active_tgt_count++;
381 LTD_TGT(ltd, index) = tgt_desc;
382 cfs_bitmap_set(ltd->ltd_tgt_bitmap, index);
384 mutex_unlock(<d->ltd_mutex);
385 lod_putref(lod, ltd);
387 if (lod->lod_recovery_completed)
388 lu_dev->ld_ops->ldo_recovery_complete(env, lu_dev);
390 if (!for_ost && lod->lod_initialized) {
391 rc = lod_sub_init_llog(env, lod, tgt_desc->ltd_tgt);
393 CERROR("%s: cannot start llog on %s:rc = %d\n",
394 lod2obd(lod)->obd_name, osp, rc);
399 rc = lfsck_add_target(env, lod->lod_child, dt_dev, exp, index, for_ost);
401 CERROR("Fail to add LFSCK target: name = %s, type = %s, "
402 "index = %u, rc = %d\n", osp, type, index, rc);
403 GOTO(out_fini_llog, rc);
407 lod_sub_fini_llog(env, tgt_desc->ltd_tgt,
408 tgt_desc->ltd_recovery_thread);
411 mutex_lock(<d->ltd_mutex);
413 if (!for_ost && LTD_TGT(ltd, index)->ltd_recovery_thread != NULL) {
414 struct ptlrpc_thread *thread;
416 thread = LTD_TGT(ltd, index)->ltd_recovery_thread;
417 OBD_FREE_PTR(thread);
420 cfs_bitmap_clear(ltd->ltd_tgt_bitmap, index);
421 LTD_TGT(ltd, index) = NULL;
423 lod_ost_pool_remove(&lod->lod_pool_info, index);
426 mutex_unlock(<d->ltd_mutex);
427 lod_putref(lod, ltd);
430 OBD_FREE_PTR(tgt_desc);
432 /* XXX OSP needs us to send down LCFG_CLEANUP because it uses
433 * objects from the MDT stack. See LU-7184. */
434 lcfg = &lod_env_info(env)->lti_lustre_cfg;
435 memset(lcfg, 0, sizeof(*lcfg));
436 lcfg->lcfg_version = LUSTRE_CFG_VERSION;
437 lcfg->lcfg_command = LCFG_CLEANUP;
438 lu_dev->ld_ops->ldo_process_config(env, lu_dev, lcfg);
447 * Schedule target removal from the target table.
449 * Mark the device as dead. The device is not removed here because it may
450 * still be in use. The device will be removed in lod_putref() when the
451 * last reference is released.
453 * \param[in] env execution environment for this thread
454 * \param[in] lod LOD device the target table belongs to
455 * \param[in] ltd target table
456 * \param[in] idx index of the target
457 * \param[in] for_ost type of the target: 0 - MDT, 1 - OST
459 static void __lod_del_device(const struct lu_env *env, struct lod_device *lod,
460 struct lod_tgt_descs *ltd, unsigned idx,
463 LASSERT(LTD_TGT(ltd, idx));
465 lfsck_del_target(env, lod->lod_child, LTD_TGT(ltd, idx)->ltd_tgt,
468 if (!for_ost && LTD_TGT(ltd, idx)->ltd_recovery_thread != NULL) {
469 struct ptlrpc_thread *thread;
471 thread = LTD_TGT(ltd, idx)->ltd_recovery_thread;
472 OBD_FREE_PTR(thread);
475 if (LTD_TGT(ltd, idx)->ltd_reap == 0) {
476 LTD_TGT(ltd, idx)->ltd_reap = 1;
477 ltd->ltd_death_row++;
482 * Schedule removal of all the targets from the given target table.
484 * See more details in the description for __lod_del_device()
486 * \param[in] env execution environment for this thread
487 * \param[in] lod LOD device the target table belongs to
488 * \param[in] ltd target table
489 * \param[in] for_ost type of the target: MDT or OST
493 int lod_fini_tgt(const struct lu_env *env, struct lod_device *lod,
494 struct lod_tgt_descs *ltd, bool for_ost)
498 if (ltd->ltd_tgts_size <= 0)
501 mutex_lock(<d->ltd_mutex);
502 cfs_foreach_bit(ltd->ltd_tgt_bitmap, idx)
503 __lod_del_device(env, lod, ltd, idx, for_ost);
504 mutex_unlock(<d->ltd_mutex);
505 lod_putref(lod, ltd);
506 CFS_FREE_BITMAP(ltd->ltd_tgt_bitmap);
507 for (idx = 0; idx < TGT_PTRS; idx++) {
508 if (ltd->ltd_tgt_idx[idx])
509 OBD_FREE_PTR(ltd->ltd_tgt_idx[idx]);
511 ltd->ltd_tgts_size = 0;
516 * Remove device by name.
518 * Remove a device identified by \a osp from the target table. Given
519 * the device can be in use, the real deletion happens in lod_putref().
521 * \param[in] env execution environment for this thread
522 * \param[in] lod LOD device to be connected to the new OSP
523 * \param[in] ltd target table
524 * \param[in] osp name of OSP device to be removed
525 * \param[in] idx index of the target
526 * \param[in] gen generation number, not used currently
527 * \param[in] for_ost type of the target: 0 - MDT, 1 - OST
529 * \retval 0 if the device was scheduled for removal
530 * \retval -EINVAL if no device was found
532 int lod_del_device(const struct lu_env *env, struct lod_device *lod,
533 struct lod_tgt_descs *ltd, char *osp, unsigned idx,
534 unsigned gen, bool for_ost)
536 struct obd_device *obd;
538 struct obd_uuid uuid;
541 CDEBUG(D_CONFIG, "osp:%s idx:%d gen:%d\n", osp, idx, gen);
543 obd_str2uuid(&uuid, osp);
545 obd = class_find_client_obd(&uuid, LUSTRE_OSP_NAME,
546 &lod->lod_dt_dev.dd_lu_dev.ld_obd->obd_uuid);
548 CERROR("can't find %s device\n", osp);
553 CERROR("%s: request to remove OBD %s with invalid generation %d"
554 "\n", obd->obd_name, osp, gen);
558 obd_str2uuid(&uuid, osp);
561 mutex_lock(<d->ltd_mutex);
562 /* check that the index is allocated in the bitmap */
563 if (!cfs_bitmap_check(ltd->ltd_tgt_bitmap, idx) ||
564 !LTD_TGT(ltd, idx)) {
565 CERROR("%s: device %d is not set up\n", obd->obd_name, idx);
566 GOTO(out, rc = -EINVAL);
569 /* check that the UUID matches */
570 if (!obd_uuid_equals(&uuid, <D_TGT(ltd, idx)->ltd_uuid)) {
571 CERROR("%s: LOD target UUID %s at index %d does not match %s\n",
572 obd->obd_name, obd_uuid2str(<D_TGT(ltd,idx)->ltd_uuid),
574 GOTO(out, rc = -EINVAL);
577 __lod_del_device(env, lod, ltd, idx, for_ost);
580 mutex_unlock(<d->ltd_mutex);
581 lod_putref(lod, ltd);
586 * Resize per-thread storage to hold specified size.
588 * A helper function to resize per-thread temporary storage. This storage
589 * is used to process LOV/LVM EAs and may be quite large. We do not want to
590 * allocate/release it every time, so instead we put it into the env and
591 * reallocate on demand. The memory is released when the correspondent thread
594 * \param[in] info LOD-specific storage in the environment
595 * \param[in] size new size to grow the buffer to
597 * \retval 0 on success, -ENOMEM if reallocation failed
599 int lod_ea_store_resize(struct lod_thread_info *info, size_t size)
601 __u32 round = size_roundup_power2(size);
603 if (info->lti_ea_store) {
604 LASSERT(info->lti_ea_store_size);
605 LASSERT(info->lti_ea_store_size < round);
606 CDEBUG(D_INFO, "EA store size %d is not enough, need %d\n",
607 info->lti_ea_store_size, round);
608 OBD_FREE_LARGE(info->lti_ea_store, info->lti_ea_store_size);
609 info->lti_ea_store = NULL;
610 info->lti_ea_store_size = 0;
613 OBD_ALLOC_LARGE(info->lti_ea_store, round);
614 if (info->lti_ea_store == NULL)
616 info->lti_ea_store_size = round;
621 static void lod_free_comp_buffer(struct lod_layout_component *entries,
622 __u16 count, __u32 bufsize)
624 struct lod_layout_component *entry;
627 for (i = 0; i < count; i++) {
629 if (entry->llc_pool != NULL)
630 lod_set_pool(&entry->llc_pool, NULL);
631 if (entry->llc_ostlist.op_array)
632 OBD_FREE(entry->llc_ostlist.op_array,
633 entry->llc_ostlist.op_size);
634 LASSERT(entry->llc_stripe == NULL);
635 LASSERT(entry->llc_stripes_allocated == 0);
639 OBD_FREE_LARGE(entries, bufsize);
642 void lod_free_def_comp_entries(struct lod_default_striping *lds)
644 lod_free_comp_buffer(lds->lds_def_comp_entries,
645 lds->lds_def_comp_size_cnt,
647 sizeof(*lds->lds_def_comp_entries) *
648 lds->lds_def_comp_size_cnt));
649 lds->lds_def_comp_entries = NULL;
650 lds->lds_def_comp_cnt = 0;
651 lds->lds_def_striping_is_composite = 0;
652 lds->lds_def_comp_size_cnt = 0;
656 * Resize per-thread storage to hold default striping component entries
658 * A helper function to resize per-thread temporary storage. This storage
659 * is used to hold default LOV/LVM EAs and may be quite large. We do not want
660 * to allocate/release it every time, so instead we put it into the env and
661 * reallocate it on demand. The memory is released when the correspondent
662 * thread is finished.
664 * \param[in,out] lds default striping
665 * \param[in] count new component count to grow the buffer to
667 * \retval 0 on success, -ENOMEM if reallocation failed
669 int lod_def_striping_comp_resize(struct lod_default_striping *lds, __u16 count)
671 struct lod_layout_component *entries;
672 __u32 new = size_roundup_power2(sizeof(*lds->lds_def_comp_entries) *
674 __u32 old = size_roundup_power2(sizeof(*lds->lds_def_comp_entries) *
675 lds->lds_def_comp_size_cnt);
680 OBD_ALLOC_LARGE(entries, new);
684 if (lds->lds_def_comp_entries != NULL) {
685 CDEBUG(D_INFO, "default striping component size %d is not "
686 "enough, need %d\n", old, new);
687 lod_free_def_comp_entries(lds);
690 lds->lds_def_comp_entries = entries;
691 lds->lds_def_comp_size_cnt = count;
696 void lod_free_comp_entries(struct lod_object *lo)
698 if (lo->ldo_mirrors) {
699 OBD_FREE(lo->ldo_mirrors,
700 sizeof(*lo->ldo_mirrors) * lo->ldo_mirror_count);
701 lo->ldo_mirrors = NULL;
702 lo->ldo_mirror_count = 0;
704 lod_free_comp_buffer(lo->ldo_comp_entries,
706 sizeof(*lo->ldo_comp_entries) * lo->ldo_comp_cnt);
707 lo->ldo_comp_entries = NULL;
708 lo->ldo_comp_cnt = 0;
709 lo->ldo_is_composite = 0;
712 int lod_alloc_comp_entries(struct lod_object *lo,
713 int mirror_count, int comp_count)
715 LASSERT(comp_count != 0);
716 LASSERT(lo->ldo_comp_cnt == 0 && lo->ldo_comp_entries == NULL);
718 if (mirror_count > 0) {
719 OBD_ALLOC(lo->ldo_mirrors,
720 sizeof(*lo->ldo_mirrors) * mirror_count);
721 if (!lo->ldo_mirrors)
724 lo->ldo_mirror_count = mirror_count;
727 OBD_ALLOC_LARGE(lo->ldo_comp_entries,
728 sizeof(*lo->ldo_comp_entries) * comp_count);
729 if (lo->ldo_comp_entries == NULL) {
730 OBD_FREE(lo->ldo_mirrors,
731 sizeof(*lo->ldo_mirrors) * mirror_count);
732 lo->ldo_mirror_count = 0;
736 lo->ldo_comp_cnt = comp_count;
740 int lod_fill_mirrors(struct lod_object *lo)
742 struct lod_layout_component *lod_comp;
744 __u16 mirror_id = 0xffff;
748 LASSERT(equi(!lo->ldo_is_composite, lo->ldo_mirror_count == 0));
750 if (!lo->ldo_is_composite)
753 lod_comp = &lo->ldo_comp_entries[0];
754 for (i = 0; i < lo->ldo_comp_cnt; i++, lod_comp++) {
755 int stale = !!(lod_comp->llc_flags & LCME_FL_STALE);
756 int preferred = !!(lod_comp->llc_flags & LCME_FL_PREF_WR);
758 if (mirror_id_of(lod_comp->llc_id) == mirror_id) {
759 lo->ldo_mirrors[mirror_idx].lme_stale |= stale;
760 lo->ldo_mirrors[mirror_idx].lme_primary |= preferred;
761 lo->ldo_mirrors[mirror_idx].lme_end = i;
767 if (mirror_idx >= lo->ldo_mirror_count)
770 mirror_id = mirror_id_of(lod_comp->llc_id);
772 lo->ldo_mirrors[mirror_idx].lme_id = mirror_id;
773 lo->ldo_mirrors[mirror_idx].lme_stale = stale;
774 lo->ldo_mirrors[mirror_idx].lme_primary = preferred;
775 lo->ldo_mirrors[mirror_idx].lme_start = i;
776 lo->ldo_mirrors[mirror_idx].lme_end = i;
778 if (mirror_idx != lo->ldo_mirror_count - 1)
785 * Generate on-disk lov_mds_md structure for each layout component based on
786 * the information in lod_object->ldo_comp_entries[i].
788 * \param[in] env execution environment for this thread
789 * \param[in] lo LOD object
790 * \param[in] comp_idx index of ldo_comp_entries
791 * \param[in] lmm buffer to cotain the on-disk lov_mds_md
792 * \param[in|out] lmm_size buffer size/lmm size
793 * \param[in] is_dir generate lov ea for dir or file? For dir case,
794 * the stripe info is from the default stripe
795 * template, which is collected in lod_ah_init(),
796 * either from parent object or root object; for
797 * file case, it's from the @lo object
799 * \retval 0 if on disk structure is created successfully
800 * \retval negative error number on failure
802 static int lod_gen_component_ea(const struct lu_env *env,
803 struct lod_object *lo, int comp_idx,
804 struct lov_mds_md *lmm, int *lmm_size,
807 struct lod_thread_info *info = lod_env_info(env);
808 const struct lu_fid *fid = lu_object_fid(&lo->ldo_obj.do_lu);
809 struct lod_device *lod;
810 struct lov_ost_data_v1 *objs;
811 struct lod_layout_component *lod_comp;
820 &lo->ldo_def_striping->lds_def_comp_entries[comp_idx];
822 lod_comp = &lo->ldo_comp_entries[comp_idx];
824 magic = lod_comp->llc_pool != NULL ? LOV_MAGIC_V3 : LOV_MAGIC_V1;
825 if (lod_comp->llc_pattern == 0) /* default striping */
826 lod_comp->llc_pattern = LOV_PATTERN_RAID0;
828 lmm->lmm_magic = cpu_to_le32(magic);
829 lmm->lmm_pattern = cpu_to_le32(lod_comp->llc_pattern);
830 fid_to_lmm_oi(fid, &lmm->lmm_oi);
831 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_LMMOI))
832 lmm->lmm_oi.oi.oi_id++;
833 lmm_oi_cpu_to_le(&lmm->lmm_oi, &lmm->lmm_oi);
835 lmm->lmm_stripe_size = cpu_to_le32(lod_comp->llc_stripe_size);
836 lmm->lmm_stripe_count = cpu_to_le16(lod_comp->llc_stripe_count);
838 * for dir and uninstantiated component, lmm_layout_gen stores
839 * default stripe offset.
841 lmm->lmm_layout_gen =
842 (is_dir || !lod_comp_inited(lod_comp)) ?
843 cpu_to_le16(lod_comp->llc_stripe_offset) :
844 cpu_to_le16(lod_comp->llc_layout_gen);
846 if (magic == LOV_MAGIC_V1) {
847 objs = &lmm->lmm_objects[0];
849 struct lov_mds_md_v3 *v3 = (struct lov_mds_md_v3 *)lmm;
850 size_t cplen = strlcpy(v3->lmm_pool_name,
852 sizeof(v3->lmm_pool_name));
853 if (cplen >= sizeof(v3->lmm_pool_name))
855 objs = &v3->lmm_objects[0];
857 stripe_count = lod_comp_entry_stripe_count(lo, lod_comp, is_dir);
858 if (stripe_count == 0 && !is_dir &&
859 !(lod_comp->llc_pattern & LOV_PATTERN_F_RELEASED) &&
860 !(lod_comp->llc_pattern & LOV_PATTERN_MDT))
863 if (!is_dir && lo->ldo_is_composite)
864 lod_comp_shrink_stripe_count(lod_comp, &stripe_count);
866 if (is_dir || lod_comp->llc_pattern & LOV_PATTERN_F_RELEASED)
869 /* generate ost_idx of this component stripe */
870 lod = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
871 for (i = 0; i < stripe_count; i++) {
872 struct dt_object *object;
873 __u32 ost_idx = (__u32)-1UL;
874 int type = LU_SEQ_RANGE_OST;
876 if (lod_comp->llc_stripe && lod_comp->llc_stripe[i]) {
877 object = lod_comp->llc_stripe[i];
878 /* instantiated component */
879 info->lti_fid = *lu_object_fid(&object->do_lu);
881 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_MULTIPLE_REF) &&
883 if (cfs_fail_val == 0)
884 cfs_fail_val = info->lti_fid.f_oid;
886 info->lti_fid.f_oid = cfs_fail_val;
889 rc = fid_to_ostid(&info->lti_fid, &info->lti_ostid);
892 ostid_cpu_to_le(&info->lti_ostid, &objs[i].l_ost_oi);
893 objs[i].l_ost_gen = cpu_to_le32(0);
894 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_FLD_LOOKUP))
897 rc = lod_fld_lookup(env, lod, &info->lti_fid,
900 CERROR("%s: Can not locate "DFID": rc = %d\n",
901 lod2obd(lod)->obd_name,
902 PFID(&info->lti_fid), rc);
905 } else if (lod_comp->llc_ostlist.op_array &&
906 lod_comp->llc_ostlist.op_count) {
907 /* user specified ost list */
908 ost_idx = lod_comp->llc_ostlist.op_array[i];
911 * with un-instantiated or with no specified ost list
912 * component, its l_ost_idx does not matter.
914 objs[i].l_ost_idx = cpu_to_le32(ost_idx);
917 if (lmm_size != NULL)
918 *lmm_size = lov_mds_md_size(stripe_count, magic);
923 * Generate on-disk lov_mds_md structure based on the information in
924 * the lod_object->ldo_comp_entries.
926 * \param[in] env execution environment for this thread
927 * \param[in] lo LOD object
928 * \param[in] lmm buffer to cotain the on-disk lov_mds_md
929 * \param[in|out] lmm_size buffer size/lmm size
930 * \param[in] is_dir generate lov ea for dir or file? For dir case,
931 * the stripe info is from the default stripe
932 * template, which is collected in lod_ah_init(),
933 * either from parent object or root object; for
934 * file case, it's from the @lo object
936 * \retval 0 if on disk structure is created successfully
937 * \retval negative error number on failure
939 int lod_generate_lovea(const struct lu_env *env, struct lod_object *lo,
940 struct lov_mds_md *lmm, int *lmm_size, bool is_dir)
942 struct lov_comp_md_entry_v1 *lcme;
943 struct lov_comp_md_v1 *lcm;
944 struct lod_layout_component *comp_entries;
945 __u16 comp_cnt, mirror_cnt;
946 bool is_composite, is_foreign = false;
947 int i, rc = 0, offset;
951 comp_cnt = lo->ldo_def_striping->lds_def_comp_cnt;
952 mirror_cnt = lo->ldo_def_striping->lds_def_mirror_cnt;
953 comp_entries = lo->ldo_def_striping->lds_def_comp_entries;
955 lo->ldo_def_striping->lds_def_striping_is_composite;
957 comp_cnt = lo->ldo_comp_cnt;
958 mirror_cnt = lo->ldo_mirror_count;
959 comp_entries = lo->ldo_comp_entries;
960 is_composite = lo->ldo_is_composite;
961 is_foreign = lo->ldo_is_foreign;
964 LASSERT(lmm_size != NULL);
967 struct lov_foreign_md *lfm;
969 lfm = (struct lov_foreign_md *)lmm;
970 memcpy(lfm, lo->ldo_foreign_lov, lo->ldo_foreign_lov_size);
971 /* need to store little-endian */
972 if (cpu_to_le32(LOV_MAGIC_FOREIGN) != LOV_MAGIC_FOREIGN) {
973 __swab32s(&lfm->lfm_magic);
974 __swab32s(&lfm->lfm_length);
975 __swab32s(&lfm->lfm_type);
976 __swab32s(&lfm->lfm_flags);
978 *lmm_size = lo->ldo_foreign_lov_size;
982 LASSERT(comp_cnt != 0 && comp_entries != NULL);
985 rc = lod_gen_component_ea(env, lo, 0, lmm, lmm_size, is_dir);
989 lcm = (struct lov_comp_md_v1 *)lmm;
990 memset(lcm, 0, sizeof(*lcm));
992 lcm->lcm_magic = cpu_to_le32(LOV_MAGIC_COMP_V1);
993 lcm->lcm_entry_count = cpu_to_le16(comp_cnt);
994 lcm->lcm_mirror_count = cpu_to_le16(mirror_cnt - 1);
995 lcm->lcm_flags = cpu_to_le16(lo->ldo_flr_state);
997 offset = sizeof(*lcm) + sizeof(*lcme) * comp_cnt;
998 LASSERT(offset % sizeof(__u64) == 0);
1000 for (i = 0; i < comp_cnt; i++) {
1001 struct lod_layout_component *lod_comp;
1002 struct lov_mds_md *sub_md;
1005 lod_comp = &comp_entries[i];
1006 lcme = &lcm->lcm_entries[i];
1008 LASSERT(ergo(!is_dir, lod_comp->llc_id != LCME_ID_INVAL));
1009 lcme->lcme_id = cpu_to_le32(lod_comp->llc_id);
1011 /* component could be un-inistantiated */
1012 lcme->lcme_flags = cpu_to_le32(lod_comp->llc_flags);
1013 if (lod_comp->llc_flags & LCME_FL_NOSYNC)
1014 lcme->lcme_timestamp =
1015 cpu_to_le64(lod_comp->llc_timestamp);
1016 lcme->lcme_extent.e_start =
1017 cpu_to_le64(lod_comp->llc_extent.e_start);
1018 lcme->lcme_extent.e_end =
1019 cpu_to_le64(lod_comp->llc_extent.e_end);
1020 lcme->lcme_offset = cpu_to_le32(offset);
1022 sub_md = (struct lov_mds_md *)((char *)lcm + offset);
1023 rc = lod_gen_component_ea(env, lo, i, sub_md, &size, is_dir);
1026 lcme->lcme_size = cpu_to_le32(size);
1028 LASSERTF((offset <= *lmm_size) && (offset % sizeof(__u64) == 0),
1029 "offset:%d lmm_size:%d\n", offset, *lmm_size);
1031 lcm->lcm_size = cpu_to_le32(offset);
1032 lcm->lcm_layout_gen = cpu_to_le32(is_dir ? 0 : lo->ldo_layout_gen);
1034 lustre_print_user_md(D_LAYOUT, (struct lov_user_md *)lmm,
1045 * Fill lti_ea_store buffer in the environment with a value for the given
1046 * EA. The buffer is reallocated if the value doesn't fit.
1048 * \param[in,out] env execution environment for this thread
1049 * .lti_ea_store buffer is filled with EA's value
1050 * \param[in] lo LOD object
1051 * \param[in] name name of the EA
1053 * \retval > 0 if EA is fetched successfully
1054 * \retval 0 if EA is empty
1055 * \retval negative error number on failure
1057 int lod_get_ea(const struct lu_env *env, struct lod_object *lo,
1060 struct lod_thread_info *info = lod_env_info(env);
1061 struct dt_object *next = dt_object_child(&lo->ldo_obj);
1067 if (unlikely(info->lti_ea_store == NULL)) {
1068 /* just to enter in allocation block below */
1072 info->lti_buf.lb_buf = info->lti_ea_store;
1073 info->lti_buf.lb_len = info->lti_ea_store_size;
1074 rc = dt_xattr_get(env, next, &info->lti_buf, name);
1077 /* if object is not striped or inaccessible */
1078 if (rc == -ENODATA || rc == -ENOENT)
1081 if (rc == -ERANGE) {
1082 /* EA doesn't fit, reallocate new buffer */
1083 rc = dt_xattr_get(env, next, &LU_BUF_NULL, name);
1084 if (rc == -ENODATA || rc == -ENOENT)
1090 rc = lod_ea_store_resize(info, rc);
1100 * Verify the target index is present in the current configuration.
1102 * \param[in] md LOD device where the target table is stored
1103 * \param[in] idx target's index
1105 * \retval 0 if the index is present
1106 * \retval -EINVAL if not
1108 static int validate_lod_and_idx(struct lod_device *md, __u32 idx)
1110 if (unlikely(idx >= md->lod_ost_descs.ltd_tgts_size ||
1111 !cfs_bitmap_check(md->lod_ost_bitmap, idx))) {
1112 CERROR("%s: bad idx: %d of %d\n", lod2obd(md)->obd_name, idx,
1113 md->lod_ost_descs.ltd_tgts_size);
1117 if (unlikely(OST_TGT(md, idx) == NULL)) {
1118 CERROR("%s: bad lod_tgt_desc for idx: %d\n",
1119 lod2obd(md)->obd_name, idx);
1123 if (unlikely(OST_TGT(md, idx)->ltd_ost == NULL)) {
1124 CERROR("%s: invalid lod device, for idx: %d\n",
1125 lod2obd(md)->obd_name , idx);
1133 * Instantiate objects for stripes.
1135 * Allocate and initialize LU-objects representing the stripes. The number
1136 * of the stripes (ldo_stripe_count) must be initialized already. The caller
1137 * must ensure nobody else is calling the function on the object at the same
1138 * time. FLDB service must be running to be able to map a FID to the targets
1139 * and find appropriate device representing that target.
1141 * \param[in] env execution environment for this thread
1142 * \param[in,out] lo LOD object
1143 * \param[in] objs an array of IDs to creates the objects from
1144 * \param[in] comp_idx index of ldo_comp_entries
1146 * \retval 0 if the objects are instantiated successfully
1147 * \retval negative error number on failure
1149 int lod_initialize_objects(const struct lu_env *env, struct lod_object *lo,
1150 struct lov_ost_data_v1 *objs, int comp_idx)
1152 struct lod_layout_component *lod_comp;
1153 struct lod_thread_info *info = lod_env_info(env);
1154 struct lod_device *md;
1155 struct lu_object *o, *n;
1156 struct lu_device *nd;
1157 struct dt_object **stripe = NULL;
1158 __u32 *ost_indices = NULL;
1164 LASSERT(lo != NULL);
1165 md = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
1167 LASSERT(lo->ldo_comp_cnt != 0 && lo->ldo_comp_entries != NULL);
1168 lod_comp = &lo->ldo_comp_entries[comp_idx];
1170 LASSERT(lod_comp->llc_stripe == NULL);
1171 LASSERT(lod_comp->llc_stripe_count > 0);
1172 LASSERT(lod_comp->llc_stripe_size > 0);
1174 stripe_len = lod_comp->llc_stripe_count;
1175 OBD_ALLOC(stripe, sizeof(stripe[0]) * stripe_len);
1178 OBD_ALLOC(ost_indices, sizeof(*ost_indices) * stripe_len);
1180 GOTO(out, rc = -ENOMEM);
1182 for (i = 0; i < lod_comp->llc_stripe_count; i++) {
1183 if (unlikely(lovea_slot_is_dummy(&objs[i])))
1186 ostid_le_to_cpu(&objs[i].l_ost_oi, &info->lti_ostid);
1187 idx = le32_to_cpu(objs[i].l_ost_idx);
1188 rc = ostid_to_fid(&info->lti_fid, &info->lti_ostid, idx);
1191 LASSERTF(fid_is_sane(&info->lti_fid), ""DFID" insane!\n",
1192 PFID(&info->lti_fid));
1193 lod_getref(&md->lod_ost_descs);
1195 rc = validate_lod_and_idx(md, idx);
1196 if (unlikely(rc != 0)) {
1197 lod_putref(md, &md->lod_ost_descs);
1201 nd = &OST_TGT(md,idx)->ltd_ost->dd_lu_dev;
1202 lod_putref(md, &md->lod_ost_descs);
1204 /* In the function below, .hs_keycmp resolves to
1205 * u_obj_hop_keycmp() */
1206 /* coverity[overrun-buffer-val] */
1207 o = lu_object_find_at(env, nd, &info->lti_fid, NULL);
1209 GOTO(out, rc = PTR_ERR(o));
1211 n = lu_object_locate(o->lo_header, nd->ld_type);
1214 stripe[i] = container_of(n, struct dt_object, do_lu);
1215 ost_indices[i] = idx;
1220 for (i = 0; i < stripe_len; i++)
1221 if (stripe[i] != NULL)
1222 dt_object_put(env, stripe[i]);
1224 OBD_FREE(stripe, sizeof(stripe[0]) * stripe_len);
1225 lod_comp->llc_stripe_count = 0;
1227 OBD_FREE(ost_indices,
1228 sizeof(*ost_indices) * stripe_len);
1230 lod_comp->llc_stripe = stripe;
1231 lod_comp->llc_ost_indices = ost_indices;
1232 lod_comp->llc_stripes_allocated = stripe_len;
1239 * Instantiate objects for striping.
1241 * Parse striping information in \a buf and instantiate the objects
1242 * representing the stripes.
1244 * \param[in] env execution environment for this thread
1245 * \param[in] lo LOD object
1246 * \param[in] buf buffer storing LOV EA to parse
1248 * \retval 0 if parsing and objects creation succeed
1249 * \retval negative error number on failure
1251 int lod_parse_striping(const struct lu_env *env, struct lod_object *lo,
1252 const struct lu_buf *buf)
1254 struct lov_mds_md_v1 *lmm;
1255 struct lov_comp_md_v1 *comp_v1 = NULL;
1256 struct lov_foreign_md *foreign = NULL;
1257 struct lov_ost_data_v1 *objs;
1258 __u32 magic, pattern;
1261 __u16 mirror_cnt = 0;
1265 LASSERT(buf->lb_buf);
1266 LASSERT(buf->lb_len);
1267 LASSERT(mutex_is_locked(&lo->ldo_layout_mutex));
1269 lmm = (struct lov_mds_md_v1 *)buf->lb_buf;
1270 magic = le32_to_cpu(lmm->lmm_magic);
1272 if (magic != LOV_MAGIC_V1 && magic != LOV_MAGIC_V3 &&
1273 magic != LOV_MAGIC_COMP_V1 && magic != LOV_MAGIC_FOREIGN)
1274 GOTO(out, rc = -EINVAL);
1276 if (lo->ldo_is_foreign)
1277 lod_free_foreign_lov(lo);
1279 lod_free_comp_entries(lo);
1281 if (magic == LOV_MAGIC_COMP_V1) {
1282 comp_v1 = (struct lov_comp_md_v1 *)lmm;
1283 comp_cnt = le16_to_cpu(comp_v1->lcm_entry_count);
1285 GOTO(out, rc = -EINVAL);
1286 lo->ldo_layout_gen = le32_to_cpu(comp_v1->lcm_layout_gen);
1287 lo->ldo_is_composite = 1;
1288 lo->ldo_flr_state = le16_to_cpu(comp_v1->lcm_flags) &
1290 mirror_cnt = le16_to_cpu(comp_v1->lcm_mirror_count) + 1;
1291 } else if (magic == LOV_MAGIC_FOREIGN) {
1294 foreign = (struct lov_foreign_md *)buf->lb_buf;
1295 length = offsetof(typeof(*foreign), lfm_value);
1296 if (buf->lb_len < length ||
1297 buf->lb_len < (length + le32_to_cpu(foreign->lfm_length))) {
1299 "buf len %zu too small for lov_foreign_md\n",
1301 GOTO(out, rc = -EINVAL);
1304 /* just cache foreign LOV EA raw */
1305 rc = lod_alloc_foreign_lov(lo, length);
1308 memcpy(lo->ldo_foreign_lov, buf->lb_buf, length);
1312 lo->ldo_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
1313 lo->ldo_is_composite = 0;
1316 rc = lod_alloc_comp_entries(lo, mirror_cnt, comp_cnt);
1320 for (i = 0; i < comp_cnt; i++) {
1321 struct lod_layout_component *lod_comp;
1322 struct lu_extent *ext;
1325 lod_comp = &lo->ldo_comp_entries[i];
1326 if (lo->ldo_is_composite) {
1327 offs = le32_to_cpu(comp_v1->lcm_entries[i].lcme_offset);
1328 lmm = (struct lov_mds_md_v1 *)((char *)comp_v1 + offs);
1329 magic = le32_to_cpu(lmm->lmm_magic);
1331 ext = &comp_v1->lcm_entries[i].lcme_extent;
1332 lod_comp->llc_extent.e_start =
1333 le64_to_cpu(ext->e_start);
1334 lod_comp->llc_extent.e_end = le64_to_cpu(ext->e_end);
1335 lod_comp->llc_flags =
1336 le32_to_cpu(comp_v1->lcm_entries[i].lcme_flags);
1337 if (lod_comp->llc_flags & LCME_FL_NOSYNC)
1338 lod_comp->llc_timestamp = le64_to_cpu(
1339 comp_v1->lcm_entries[i].lcme_timestamp);
1341 le32_to_cpu(comp_v1->lcm_entries[i].lcme_id);
1342 if (lod_comp->llc_id == LCME_ID_INVAL)
1343 GOTO(out, rc = -EINVAL);
1345 lod_comp_set_init(lod_comp);
1348 pattern = le32_to_cpu(lmm->lmm_pattern);
1349 if (!lov_pattern_supported(lov_pattern(pattern)))
1350 GOTO(out, rc = -EINVAL);
1352 lod_comp->llc_pattern = pattern;
1353 lod_comp->llc_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
1354 lod_comp->llc_stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
1355 lod_comp->llc_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
1357 if (magic == LOV_MAGIC_V3) {
1358 struct lov_mds_md_v3 *v3 = (struct lov_mds_md_v3 *)lmm;
1359 lod_set_pool(&lod_comp->llc_pool, v3->lmm_pool_name);
1360 objs = &v3->lmm_objects[0];
1362 lod_set_pool(&lod_comp->llc_pool, NULL);
1363 objs = &lmm->lmm_objects[0];
1367 * If uninstantiated template component has valid l_ost_idx,
1368 * then user has specified ost list for this component.
1370 if (!lod_comp_inited(lod_comp)) {
1373 if (objs[0].l_ost_idx != (__u32)-1UL) {
1374 stripe_count = lod_comp_entry_stripe_count(
1375 lo, lod_comp, false);
1376 if (stripe_count == 0 &&
1377 !(lod_comp->llc_pattern & LOV_PATTERN_F_RELEASED) &&
1378 !(lod_comp->llc_pattern & LOV_PATTERN_MDT))
1379 GOTO(out, rc = -E2BIG);
1381 * load the user specified ost list, when this
1382 * component is instantiated later, it will be
1383 * used in lod_alloc_ost_list().
1385 lod_comp->llc_ostlist.op_count = stripe_count;
1386 lod_comp->llc_ostlist.op_size =
1387 stripe_count * sizeof(__u32);
1388 OBD_ALLOC(lod_comp->llc_ostlist.op_array,
1389 lod_comp->llc_ostlist.op_size);
1390 if (!lod_comp->llc_ostlist.op_array)
1391 GOTO(out, rc = -ENOMEM);
1393 for (j = 0; j < stripe_count; j++)
1394 lod_comp->llc_ostlist.op_array[j] =
1395 le32_to_cpu(objs[j].l_ost_idx);
1398 * this component OST objects starts from the
1399 * first ost_idx, lod_alloc_ost_list() will
1402 lod_comp->llc_stripe_offset = objs[0].l_ost_idx;
1405 * for uninstantiated component,
1406 * lmm_layout_gen stores default stripe offset.
1408 lod_comp->llc_stripe_offset =
1409 lmm->lmm_layout_gen;
1413 /* skip un-instantiated component object initialization */
1414 if (!lod_comp_inited(lod_comp))
1417 if (!(lod_comp->llc_pattern & LOV_PATTERN_F_RELEASED) &&
1418 !(lod_comp->llc_pattern & LOV_PATTERN_MDT)) {
1419 rc = lod_initialize_objects(env, lo, objs, i);
1425 rc = lod_fill_mirrors(lo);
1431 lod_striping_free_nolock(env, lo);
1436 * Check whether the striping (LOVEA for regular file, LMVEA for directory)
1437 * is already cached.
1439 * \param[in] lo LOD object
1441 * \retval True if the striping is cached, otherwise
1444 static bool lod_striping_loaded(struct lod_object *lo)
1446 if (S_ISREG(lod2lu_obj(lo)->lo_header->loh_attr) &&
1447 lo->ldo_comp_cached)
1450 if (S_ISDIR(lod2lu_obj(lo)->lo_header->loh_attr)) {
1451 if (lo->ldo_dir_stripe_loaded)
1454 /* Never load LMV stripe for slaves of striped dir */
1455 if (lo->ldo_dir_slave_stripe)
1463 * A generic function to initialize the stripe objects.
1465 * A protected version of lod_striping_load_locked() - load the striping
1466 * information from storage, parse that and instantiate LU objects to
1467 * represent the stripes. The LOD object \a lo supplies a pointer to the
1468 * next sub-object in the LU stack so we can lock it. Also use \a lo to
1469 * return an array of references to the newly instantiated objects.
1471 * \param[in] env execution environment for this thread
1472 * \param[in,out] lo LOD object, where striping is stored and
1473 * which gets an array of references
1475 * \retval 0 if parsing and object creation succeed
1476 * \retval negative error number on failure
1478 int lod_striping_load(const struct lu_env *env, struct lod_object *lo)
1480 struct lod_thread_info *info = lod_env_info(env);
1481 struct dt_object *next = dt_object_child(&lo->ldo_obj);
1482 struct lu_buf *buf = &info->lti_buf;
1487 if (!dt_object_exists(next))
1490 if (lod_striping_loaded(lo))
1493 mutex_lock(&lo->ldo_layout_mutex);
1494 if (lod_striping_loaded(lo))
1495 GOTO(unlock, rc = 0);
1497 if (S_ISREG(lod2lu_obj(lo)->lo_header->loh_attr)) {
1498 rc = lod_get_lov_ea(env, lo);
1503 * there is LOV EA (striping information) in this object
1504 * let's parse it and create in-core objects for the stripes
1506 buf->lb_buf = info->lti_ea_store;
1507 buf->lb_len = info->lti_ea_store_size;
1508 rc = lod_parse_striping(env, lo, buf);
1510 lo->ldo_comp_cached = 1;
1511 } else if (S_ISDIR(lod2lu_obj(lo)->lo_header->loh_attr)) {
1512 rc = lod_get_lmv_ea(env, lo);
1513 if (rc > sizeof(struct lmv_foreign_md)) {
1514 struct lmv_foreign_md *lfm = info->lti_ea_store;
1516 if (le32_to_cpu(lfm->lfm_magic) == LMV_MAGIC_FOREIGN) {
1517 lo->ldo_foreign_lmv = info->lti_ea_store;
1518 lo->ldo_foreign_lmv_size =
1519 info->lti_ea_store_size;
1520 info->lti_ea_store = NULL;
1521 info->lti_ea_store_size = 0;
1523 lo->ldo_dir_stripe_loaded = 1;
1524 lo->ldo_dir_is_foreign = 1;
1525 GOTO(unlock, rc = 0);
1529 if (rc < (int)sizeof(struct lmv_mds_md_v1)) {
1530 /* Let's set stripe_loaded to avoid further
1531 * stripe loading especially for non-stripe directory,
1532 * which can hurt performance. (See LU-9840)
1535 lo->ldo_dir_stripe_loaded = 1;
1536 GOTO(unlock, rc = rc > 0 ? -EINVAL : rc);
1538 buf->lb_buf = info->lti_ea_store;
1539 buf->lb_len = info->lti_ea_store_size;
1540 if (rc == sizeof(struct lmv_mds_md_v1)) {
1541 rc = lod_load_lmv_shards(env, lo, buf, true);
1542 if (buf->lb_buf != info->lti_ea_store) {
1543 OBD_FREE_LARGE(info->lti_ea_store,
1544 info->lti_ea_store_size);
1545 info->lti_ea_store = buf->lb_buf;
1546 info->lti_ea_store_size = buf->lb_len;
1554 * there is LMV EA (striping information) in this object
1555 * let's parse it and create in-core objects for the stripes
1557 rc = lod_parse_dir_striping(env, lo, buf);
1559 lo->ldo_dir_stripe_loaded = 1;
1563 mutex_unlock(&lo->ldo_layout_mutex);
1568 int lod_striping_reload(const struct lu_env *env, struct lod_object *lo,
1569 const struct lu_buf *buf)
1575 mutex_lock(&lo->ldo_layout_mutex);
1576 lod_striping_free_nolock(env, lo);
1577 rc = lod_parse_striping(env, lo, buf);
1578 mutex_unlock(&lo->ldo_layout_mutex);
1584 * Verify lov_user_md_v1/v3 striping.
1586 * Check the validity of all fields including the magic, stripe size,
1587 * stripe count, stripe offset and that the pool is present. Also check
1588 * that each target index points to an existing target. The additional
1589 * \a is_from_disk turns additional checks. In some cases zero fields
1590 * are allowed (like pattern=0).
1592 * \param[in] d LOD device
1593 * \param[in] buf buffer with LOV EA to verify
1594 * \param[in] is_from_disk 0 - from user, allow some fields to be 0
1595 * 1 - from disk, do not allow
1597 * \retval 0 if the striping is valid
1598 * \retval -EINVAL if striping is invalid
1600 static int lod_verify_v1v3(struct lod_device *d, const struct lu_buf *buf,
1603 struct lov_user_md_v1 *lum;
1604 struct lov_user_md_v3 *lum3;
1605 struct pool_desc *pool = NULL;
1609 __u16 stripe_offset;
1616 if (buf->lb_len < sizeof(*lum)) {
1617 CDEBUG(D_LAYOUT, "buf len %zu too small for lov_user_md\n",
1619 GOTO(out, rc = -EINVAL);
1622 magic = le32_to_cpu(lum->lmm_magic) & ~LOV_MAGIC_DEFINED;
1623 if (magic != LOV_USER_MAGIC_V1 &&
1624 magic != LOV_USER_MAGIC_V3 &&
1625 magic != LOV_USER_MAGIC_SPECIFIC) {
1626 CDEBUG(D_LAYOUT, "bad userland LOV MAGIC: %#x\n",
1627 le32_to_cpu(lum->lmm_magic));
1628 GOTO(out, rc = -EINVAL);
1631 /* the user uses "0" for default stripe pattern normally. */
1632 if (!is_from_disk && lum->lmm_pattern == LOV_PATTERN_NONE)
1633 lum->lmm_pattern = cpu_to_le32(LOV_PATTERN_RAID0);
1635 if (!lov_pattern_supported(le32_to_cpu(lum->lmm_pattern))) {
1636 CDEBUG(D_LAYOUT, "bad userland stripe pattern: %#x\n",
1637 le32_to_cpu(lum->lmm_pattern));
1638 GOTO(out, rc = -EINVAL);
1641 /* a released lum comes from creating orphan on hsm release,
1642 * doesn't make sense to verify it. */
1643 if (le32_to_cpu(lum->lmm_pattern) & LOV_PATTERN_F_RELEASED)
1646 /* 64kB is the largest common page size we see (ia64), and matches the
1648 stripe_size = le32_to_cpu(lum->lmm_stripe_size);
1649 if (stripe_size & (LOV_MIN_STRIPE_SIZE - 1)) {
1650 CDEBUG(D_LAYOUT, "stripe size %u not a multiple of %u\n",
1651 stripe_size, LOV_MIN_STRIPE_SIZE);
1652 GOTO(out, rc = -EINVAL);
1655 stripe_offset = le16_to_cpu(lum->lmm_stripe_offset);
1656 if (!is_from_disk && stripe_offset != LOV_OFFSET_DEFAULT &&
1657 lov_pattern(le32_to_cpu(lum->lmm_pattern)) != LOV_PATTERN_MDT) {
1658 /* if offset is not within valid range [0, osts_size) */
1659 if (stripe_offset >= d->lod_osts_size) {
1660 CDEBUG(D_LAYOUT, "stripe offset %u >= bitmap size %u\n",
1661 stripe_offset, d->lod_osts_size);
1662 GOTO(out, rc = -EINVAL);
1665 /* if lmm_stripe_offset is *not* in bitmap */
1666 if (!cfs_bitmap_check(d->lod_ost_bitmap, stripe_offset)) {
1667 CDEBUG(D_LAYOUT, "stripe offset %u not in bitmap\n",
1669 GOTO(out, rc = -EINVAL);
1673 if (magic == LOV_USER_MAGIC_V1)
1674 lum_size = offsetof(struct lov_user_md_v1,
1676 else if (magic == LOV_USER_MAGIC_V3 || magic == LOV_USER_MAGIC_SPECIFIC)
1677 lum_size = offsetof(struct lov_user_md_v3,
1680 GOTO(out, rc = -EINVAL);
1682 stripe_count = le16_to_cpu(lum->lmm_stripe_count);
1683 if (buf->lb_len < lum_size) {
1684 CDEBUG(D_LAYOUT, "invalid buf len %zu/%zu for lov_user_md with "
1685 "magic %#x and stripe_count %u\n",
1686 buf->lb_len, lum_size, magic, stripe_count);
1687 GOTO(out, rc = -EINVAL);
1690 if (!(magic == LOV_USER_MAGIC_V3 || magic == LOV_USER_MAGIC_SPECIFIC))
1694 /* In the function below, .hs_keycmp resolves to
1695 * pool_hashkey_keycmp() */
1696 /* coverity[overrun-buffer-val] */
1697 pool = lod_find_pool(d, lum3->lmm_pool_name);
1701 if (!is_from_disk && stripe_offset != LOV_OFFSET_DEFAULT) {
1702 rc = lod_check_index_in_pool(stripe_offset, pool);
1704 GOTO(out, rc = -EINVAL);
1707 if (is_from_disk && stripe_count > pool_tgt_count(pool)) {
1708 CDEBUG(D_LAYOUT, "stripe count %u > # OSTs %u in the pool\n",
1709 stripe_count, pool_tgt_count(pool));
1710 GOTO(out, rc = -EINVAL);
1715 lod_pool_putref(pool);
1721 struct lov_comp_md_entry_v1 *comp_entry_v1(struct lov_comp_md_v1 *comp, int i)
1723 LASSERTF((le32_to_cpu(comp->lcm_magic) & ~LOV_MAGIC_DEFINED) ==
1724 LOV_USER_MAGIC_COMP_V1, "Wrong magic %x\n",
1725 le32_to_cpu(comp->lcm_magic));
1726 LASSERTF(i >= 0 && i < le16_to_cpu(comp->lcm_entry_count),
1727 "bad index %d, max = %d\n",
1728 i, le16_to_cpu(comp->lcm_entry_count));
1730 return &comp->lcm_entries[i];
1733 #define for_each_comp_entry_v1(comp, entry) \
1734 for (entry = comp_entry_v1(comp, 0); \
1735 entry <= comp_entry_v1(comp, \
1736 le16_to_cpu(comp->lcm_entry_count) - 1); \
1739 int lod_erase_dom_stripe(struct lov_comp_md_v1 *comp_v1)
1741 struct lov_comp_md_entry_v1 *ent, *dom_ent;
1743 __u32 dom_off, dom_size, comp_size;
1744 void *blob_src, *blob_dst;
1745 unsigned int blob_size, blob_shift;
1747 entries = le16_to_cpu(comp_v1->lcm_entry_count) - 1;
1748 /* if file has only DoM stripe return just error */
1752 comp_size = le32_to_cpu(comp_v1->lcm_size);
1753 dom_ent = &comp_v1->lcm_entries[0];
1754 dom_off = le32_to_cpu(dom_ent->lcme_offset);
1755 dom_size = le32_to_cpu(dom_ent->lcme_size);
1757 /* shift entries array first */
1758 comp_v1->lcm_entry_count = cpu_to_le16(entries);
1759 memmove(dom_ent, dom_ent + 1,
1760 entries * sizeof(struct lov_comp_md_entry_v1));
1762 /* now move blob of layouts */
1763 blob_dst = (void *)comp_v1 + dom_off - sizeof(*dom_ent);
1764 blob_src = (void *)comp_v1 + dom_off + dom_size;
1765 blob_size = (unsigned long)((void *)comp_v1 + comp_size - blob_src);
1766 blob_shift = sizeof(*dom_ent) + dom_size;
1768 memmove(blob_dst, blob_src, blob_size);
1770 for_each_comp_entry_v1(comp_v1, ent) {
1773 off = le32_to_cpu(ent->lcme_offset);
1774 ent->lcme_offset = cpu_to_le32(off - blob_shift);
1777 comp_v1->lcm_size = cpu_to_le32(comp_size - blob_shift);
1779 /* notify a caller to re-check entry */
1783 int lod_fix_dom_stripe(struct lod_device *d, struct lov_comp_md_v1 *comp_v1)
1785 struct lov_comp_md_entry_v1 *ent, *dom_ent;
1786 struct lu_extent *dom_ext, *ext;
1787 struct lov_user_md_v1 *lum;
1792 dom_ent = &comp_v1->lcm_entries[0];
1793 dom_ext = &dom_ent->lcme_extent;
1794 dom_mid = mirror_id_of(le32_to_cpu(dom_ent->lcme_id));
1795 stripe_size = d->lod_dom_max_stripesize;
1797 lum = (void *)comp_v1 + le32_to_cpu(dom_ent->lcme_offset);
1798 CDEBUG(D_LAYOUT, "DoM component size %u was bigger than MDT limit %u, "
1799 "new size is %u\n", le32_to_cpu(lum->lmm_stripe_size),
1800 d->lod_dom_max_stripesize, stripe_size);
1801 lum->lmm_stripe_size = cpu_to_le32(stripe_size);
1803 for_each_comp_entry_v1(comp_v1, ent) {
1807 mid = mirror_id_of(le32_to_cpu(ent->lcme_id));
1811 ext = &ent->lcme_extent;
1812 if (ext->e_start != dom_ext->e_end)
1815 /* Found next component after the DoM one with the same
1816 * mirror_id and adjust its start with DoM component end.
1818 * NOTE: we are considering here that there can be only one
1819 * DoM component in a file, all replicas are located on OSTs
1820 * always and don't need adjustment since use own layouts.
1822 ext->e_start = cpu_to_le64(stripe_size);
1826 if (stripe_size == 0) {
1827 /* DoM component size is zero due to server setting,
1828 * remove it from the layout */
1829 rc = lod_erase_dom_stripe(comp_v1);
1831 /* Update DoM extent end finally */
1832 dom_ext->e_end = cpu_to_le64(stripe_size);
1839 * Verify LOV striping.
1841 * \param[in] d LOD device
1842 * \param[in] buf buffer with LOV EA to verify
1843 * \param[in] is_from_disk 0 - from user, allow some fields to be 0
1844 * 1 - from disk, do not allow
1845 * \param[in] start extent start for composite layout
1847 * \retval 0 if the striping is valid
1848 * \retval -EINVAL if striping is invalid
1850 int lod_verify_striping(struct lod_device *d, struct lod_object *lo,
1851 const struct lu_buf *buf, bool is_from_disk)
1853 struct lov_desc *desc = &d->lod_desc;
1854 struct lov_user_md_v1 *lum;
1855 struct lov_comp_md_v1 *comp_v1;
1856 struct lov_comp_md_entry_v1 *ent;
1857 struct lu_extent *ext;
1860 __u32 stripe_size = 0;
1861 __u16 prev_mid = -1, mirror_id = -1;
1867 if (buf->lb_len < sizeof(lum->lmm_magic)) {
1868 CDEBUG(D_LAYOUT, "invalid buf len %zu\n", buf->lb_len);
1874 magic = le32_to_cpu(lum->lmm_magic) & ~LOV_MAGIC_DEFINED;
1875 /* treat foreign LOV EA/object case first
1876 * XXX is it expected to try setting again a foreign?
1877 * XXX should we care about different current vs new layouts ?
1879 if (unlikely(magic == LOV_USER_MAGIC_FOREIGN)) {
1880 struct lov_foreign_md *lfm = buf->lb_buf;
1882 if (buf->lb_len < offsetof(typeof(*lfm), lfm_value)) {
1884 "buf len %zu < min lov_foreign_md size (%zu)\n",
1885 buf->lb_len, offsetof(typeof(*lfm),
1890 if (foreign_size_le(lfm) > buf->lb_len) {
1892 "buf len %zu < this lov_foreign_md size (%zu)\n",
1893 buf->lb_len, foreign_size_le(lfm));
1896 /* Don't do anything with foreign layouts */
1900 /* normal LOV/layout cases */
1902 if (buf->lb_len < sizeof(*lum)) {
1903 CDEBUG(D_LAYOUT, "buf len %zu too small for lov_user_md\n",
1908 if (magic != LOV_USER_MAGIC_V1 &&
1909 magic != LOV_USER_MAGIC_V3 &&
1910 magic != LOV_USER_MAGIC_SPECIFIC &&
1911 magic != LOV_USER_MAGIC_COMP_V1) {
1912 CDEBUG(D_LAYOUT, "bad userland LOV MAGIC: %#x\n",
1913 le32_to_cpu(lum->lmm_magic));
1917 if (magic != LOV_USER_MAGIC_COMP_V1)
1918 RETURN(lod_verify_v1v3(d, buf, is_from_disk));
1920 /* magic == LOV_USER_MAGIC_COMP_V1 */
1921 comp_v1 = buf->lb_buf;
1922 if (buf->lb_len < le32_to_cpu(comp_v1->lcm_size)) {
1923 CDEBUG(D_LAYOUT, "buf len %zu is less than %u\n",
1924 buf->lb_len, le32_to_cpu(comp_v1->lcm_size));
1930 if (le16_to_cpu(comp_v1->lcm_entry_count) == 0) {
1931 CDEBUG(D_LAYOUT, "entry count is zero\n");
1935 if (S_ISREG(lod2lu_obj(lo)->lo_header->loh_attr) &&
1936 lo->ldo_comp_cnt > 0) {
1937 /* could be called from lustre.lov.add */
1938 __u32 cnt = lo->ldo_comp_cnt;
1940 ext = &lo->ldo_comp_entries[cnt - 1].llc_extent;
1941 prev_end = ext->e_end;
1946 for_each_comp_entry_v1(comp_v1, ent) {
1947 ext = &ent->lcme_extent;
1949 if (le64_to_cpu(ext->e_start) >= le64_to_cpu(ext->e_end)) {
1950 CDEBUG(D_LAYOUT, "invalid extent "DEXT"\n",
1951 le64_to_cpu(ext->e_start),
1952 le64_to_cpu(ext->e_end));
1957 /* lcme_id contains valid value */
1958 if (le32_to_cpu(ent->lcme_id) == 0 ||
1959 le32_to_cpu(ent->lcme_id) > LCME_ID_MAX) {
1960 CDEBUG(D_LAYOUT, "invalid id %u\n",
1961 le32_to_cpu(ent->lcme_id));
1965 if (le16_to_cpu(comp_v1->lcm_mirror_count) > 0) {
1966 mirror_id = mirror_id_of(
1967 le32_to_cpu(ent->lcme_id));
1969 /* first component must start with 0 */
1970 if (mirror_id != prev_mid &&
1971 le64_to_cpu(ext->e_start) != 0) {
1973 "invalid start:%llu, expect:0\n",
1974 le64_to_cpu(ext->e_start));
1978 prev_mid = mirror_id;
1982 if (le64_to_cpu(ext->e_start) == 0) {
1987 /* the next must be adjacent with the previous one */
1988 if (le64_to_cpu(ext->e_start) != prev_end) {
1990 "invalid start actual:%llu, expect:%llu\n",
1991 le64_to_cpu(ext->e_start), prev_end);
1995 tmp.lb_buf = (char *)comp_v1 + le32_to_cpu(ent->lcme_offset);
1996 tmp.lb_len = le32_to_cpu(ent->lcme_size);
1998 /* Check DoM entry is always the first one */
2000 if (lov_pattern(le32_to_cpu(lum->lmm_pattern)) ==
2002 /* DoM component can be only the first stripe */
2003 if (le64_to_cpu(ext->e_start) > 0) {
2004 CDEBUG(D_LAYOUT, "invalid DoM component "
2005 "with %llu extent start\n",
2006 le64_to_cpu(ext->e_start));
2009 stripe_size = le32_to_cpu(lum->lmm_stripe_size);
2010 /* There is just one stripe on MDT and it must
2011 * cover whole component size. */
2012 if (stripe_size != le64_to_cpu(ext->e_end)) {
2013 CDEBUG(D_LAYOUT, "invalid DoM layout "
2014 "stripe size %u != %llu "
2015 "(component size)\n",
2016 stripe_size, prev_end);
2019 /* Check stripe size againts per-MDT limit */
2020 if (stripe_size > d->lod_dom_max_stripesize) {
2021 CDEBUG(D_LAYOUT, "DoM component size "
2022 "%u is bigger than MDT limit %u, check "
2023 "dom_max_stripesize parameter\n",
2024 stripe_size, d->lod_dom_max_stripesize);
2025 rc = lod_fix_dom_stripe(d, comp_v1);
2026 if (rc == -ERESTART) {
2027 /* DoM entry was removed, re-check
2028 * new layout from start */
2036 prev_end = le64_to_cpu(ext->e_end);
2038 rc = lod_verify_v1v3(d, &tmp, is_from_disk);
2042 if (prev_end == LUSTRE_EOF)
2045 /* extent end must be aligned with the stripe_size */
2046 stripe_size = le32_to_cpu(lum->lmm_stripe_size);
2047 if (stripe_size == 0)
2048 stripe_size = desc->ld_default_stripe_size;
2049 if (stripe_size == 0 || (prev_end & (stripe_size - 1))) {
2050 CDEBUG(D_LAYOUT, "stripe size isn't aligned, "
2051 "stripe_sz: %u, [%llu, %llu)\n",
2052 stripe_size, ext->e_start, prev_end);
2057 /* make sure that the mirror_count is telling the truth */
2058 if (mirror_count != le16_to_cpu(comp_v1->lcm_mirror_count) + 1)
2065 * set the default stripe size, if unset.
2067 * \param[in,out] val number of bytes per OST stripe
2069 * The minimum stripe size is 64KB to ensure that a single stripe is an
2070 * even multiple of a client PAGE_SIZE (IA64, PPC, etc). Otherwise, it
2071 * is difficult to split dirty pages across OSCs during writes.
2073 void lod_fix_desc_stripe_size(__u64 *val)
2075 if (*val < LOV_MIN_STRIPE_SIZE) {
2077 LCONSOLE_INFO("Increasing default stripe size to "
2078 "minimum value %u\n",
2079 LOV_DESC_STRIPE_SIZE_DEFAULT);
2080 *val = LOV_DESC_STRIPE_SIZE_DEFAULT;
2081 } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
2082 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
2083 LCONSOLE_WARN("Changing default stripe size to %llu (a "
2084 "multiple of %u)\n",
2085 *val, LOV_MIN_STRIPE_SIZE);
2090 * set the filesystem default number of stripes, if unset.
2092 * \param[in,out] val number of stripes
2094 * A value of "0" means "use the system-wide default stripe count", which
2095 * has either been inherited by now, or falls back to 1 stripe per file.
2096 * A value of "-1" (0xffffffff) means "stripe over all available OSTs",
2097 * and is a valid value, so is left unchanged here.
2099 void lod_fix_desc_stripe_count(__u32 *val)
2106 * set the filesystem default layout pattern
2108 * \param[in,out] val LOV_PATTERN_* layout
2110 * A value of "0" means "use the system-wide default layout type", which
2111 * has either been inherited by now, or falls back to plain RAID0 striping.
2113 void lod_fix_desc_pattern(__u32 *val)
2115 /* from lov_setstripe */
2116 if ((*val != 0) && !lov_pattern_supported_normal_comp(*val)) {
2117 LCONSOLE_WARN("lod: Unknown stripe pattern: %#x\n", *val);
2122 void lod_fix_desc_qos_maxage(__u32 *val)
2124 /* fix qos_maxage */
2126 *val = LOV_DESC_QOS_MAXAGE_DEFAULT;
2130 * Used to fix insane default striping.
2132 * \param[in] desc striping description
2134 void lod_fix_desc(struct lov_desc *desc)
2136 lod_fix_desc_stripe_size(&desc->ld_default_stripe_size);
2137 lod_fix_desc_stripe_count(&desc->ld_default_stripe_count);
2138 lod_fix_desc_pattern(&desc->ld_pattern);
2139 lod_fix_desc_qos_maxage(&desc->ld_qos_maxage);
2143 * Initialize the structures used to store pools and default striping.
2145 * \param[in] lod LOD device
2146 * \param[in] lcfg configuration structure storing default striping.
2148 * \retval 0 if initialization succeeds
2149 * \retval negative error number on failure
2151 int lod_pools_init(struct lod_device *lod, struct lustre_cfg *lcfg)
2153 struct obd_device *obd;
2154 struct lov_desc *desc;
2158 obd = class_name2obd(lustre_cfg_string(lcfg, 0));
2159 LASSERT(obd != NULL);
2160 obd->obd_lu_dev = &lod->lod_dt_dev.dd_lu_dev;
2162 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
2163 CERROR("LOD setup requires a descriptor\n");
2167 desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
2169 if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
2170 CERROR("descriptor size wrong: %d > %d\n",
2171 (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
2175 if (desc->ld_magic != LOV_DESC_MAGIC) {
2176 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
2177 CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
2178 obd->obd_name, desc);
2179 lustre_swab_lov_desc(desc);
2181 CERROR("%s: Bad lov desc magic: %#x\n",
2182 obd->obd_name, desc->ld_magic);
2189 desc->ld_active_tgt_count = 0;
2190 lod->lod_desc = *desc;
2192 lod->lod_sp_me = LUSTRE_SP_CLI;
2194 /* Set up allocation policy (QoS and RR) */
2195 INIT_LIST_HEAD(&lod->lod_qos.lq_svr_list);
2196 init_rwsem(&lod->lod_qos.lq_rw_sem);
2197 lod->lod_qos.lq_dirty = 1;
2198 lod->lod_qos.lq_rr.lqr_dirty = 1;
2199 lod->lod_qos.lq_reset = 1;
2200 /* Default priority is toward free space balance */
2201 lod->lod_qos.lq_prio_free = 232;
2202 /* Default threshold for rr (roughly 17%) */
2203 lod->lod_qos.lq_threshold_rr = 43;
2205 /* Set up OST pool environment */
2206 lod->lod_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
2207 HASH_POOLS_MAX_BITS,
2208 HASH_POOLS_BKT_BITS, 0,
2211 &pool_hash_operations,
2213 if (lod->lod_pools_hash_body == NULL)
2216 INIT_LIST_HEAD(&lod->lod_pool_list);
2217 lod->lod_pool_count = 0;
2218 rc = lod_ost_pool_init(&lod->lod_pool_info, 0);
2221 lod_qos_rr_init(&lod->lod_qos.lq_rr);
2222 rc = lod_ost_pool_init(&lod->lod_qos.lq_rr.lqr_pool, 0);
2224 GOTO(out_pool_info, rc);
2229 lod_ost_pool_free(&lod->lod_pool_info);
2231 cfs_hash_putref(lod->lod_pools_hash_body);
2237 * Release the structures describing the pools.
2239 * \param[in] lod LOD device from which we release the structures
2243 int lod_pools_fini(struct lod_device *lod)
2245 struct obd_device *obd = lod2obd(lod);
2246 struct pool_desc *pool, *tmp;
2249 list_for_each_entry_safe(pool, tmp, &lod->lod_pool_list, pool_list) {
2250 /* free pool structs */
2251 CDEBUG(D_INFO, "delete pool %p\n", pool);
2252 /* In the function below, .hs_keycmp resolves to
2253 * pool_hashkey_keycmp() */
2254 /* coverity[overrun-buffer-val] */
2255 lod_pool_del(obd, pool->pool_name);
2258 cfs_hash_putref(lod->lod_pools_hash_body);
2259 lod_ost_pool_free(&(lod->lod_qos.lq_rr.lqr_pool));
2260 lod_ost_pool_free(&lod->lod_pool_info);