* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* as published by the Free Software Foundation.
-
+ *
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License version 2 for more details. A copy is
* included in the COPYING file that accompanied this code.
-
+ *
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * version 2 along with this program; If not, see
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved
* Use is subject to license terms.
+ *
+ * Copyright (c) 2012, 2014, Intel Corporation.
*/
/*
* lustre/lod/lod_lov.c
*
- * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
+ * A set of helpers to maintain Logical Object Volume (LOV)
+ * Extended Attribute (EA) and known OST targets
+ *
+ * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
*/
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
#define DEBUG_SUBSYSTEM S_MDS
#include <obd_class.h>
-#include <obd_lov.h>
+#include <lustre_lfsck.h>
+#include <lustre_lmv.h>
#include "lod_internal.h"
-/*
- * Keep a refcount of lod->lod_osts usage to prevent racing with
- * addition/deletion. Any function that expects lov_tgts to remain stationary
- * must take a ref.
+/**
+ * Increase reference count on the target table.
+ *
+ * Increase reference count on the target table usage to prevent racing with
+ * addition/deletion. Any function that expects the table to remain
+ * stationary must take a ref.
*
- * \param lod - is the lod device from which we want to grab a reference
+ * \param[in] ltd target table (lod_ost_descs or lod_mdt_descs)
*/
-void lod_getref(struct lod_device *lod)
+void lod_getref(struct lod_tgt_descs *ltd)
{
- cfs_down_read(&lod->lod_rw_sem);
- cfs_mutex_lock(&lod->lod_mutex);
- lod->lod_refcount++;
- cfs_mutex_unlock(&lod->lod_mutex);
+ down_read(<d->ltd_rw_sem);
+ mutex_lock(<d->ltd_mutex);
+ ltd->ltd_refcount++;
+ mutex_unlock(<d->ltd_mutex);
}
-/*
- * Companion of lod_getref() to release a reference on the lod table.
- * If this is the last reference and the ost entry was scheduled for deletion,
- * the descriptor is removed from the array.
+/**
+ * Decrease reference count on the target table.
+ *
+ * Companion of lod_getref() to release a reference on the target table.
+ * If this is the last reference and the OST entry was scheduled for deletion,
+ * the descriptor is removed from the table.
*
- * \param lod - is the lod device from which we release a reference
+ * \param[in] lod LOD device from which we release a reference
+ * \param[in] ltd target table (lod_ost_descs or lod_mdt_descs)
*/
-void lod_putref(struct lod_device *lod)
+void lod_putref(struct lod_device *lod, struct lod_tgt_descs *ltd)
{
- cfs_mutex_lock(&lod->lod_mutex);
- lod->lod_refcount--;
- if (lod->lod_refcount == 0 && lod->lod_death_row) {
- struct lod_ost_desc *ost_desc, *tmp;
- int idx;
- CFS_LIST_HEAD(kill);
+ mutex_lock(<d->ltd_mutex);
+ ltd->ltd_refcount--;
+ if (ltd->ltd_refcount == 0 && ltd->ltd_death_row) {
+ struct lod_tgt_desc *tgt_desc, *tmp;
+ struct list_head kill;
+ unsigned int idx;
- CDEBUG(D_CONFIG, "destroying %d lod desc\n",
- lod->lod_death_row);
+ CDEBUG(D_CONFIG, "destroying %d ltd desc\n",
+ ltd->ltd_death_row);
- cfs_foreach_bit(lod->lod_ost_bitmap, idx) {
- ost_desc = OST_TGT(lod, idx);
- LASSERT(ost_desc);
+ INIT_LIST_HEAD(&kill);
- if (!ost_desc->ltd_reap)
- continue;
+ cfs_foreach_bit(ltd->ltd_tgt_bitmap, idx) {
+ tgt_desc = LTD_TGT(ltd, idx);
+ LASSERT(tgt_desc);
- cfs_list_add(&ost_desc->ltd_kill, &kill);
+ if (!tgt_desc->ltd_reap)
+ continue;
- lod_ost_pool_remove(&lod->lod_pool_info, idx);
- OST_TGT(lod, idx) = NULL;
- lod->lod_ostnr--;
- cfs_bitmap_clear(lod->lod_ost_bitmap, idx);
- if (ost_desc->ltd_active)
- lod->lod_desc.ld_active_tgt_count--;
- lod->lod_death_row--;
+ list_add(&tgt_desc->ltd_kill, &kill);
+ LTD_TGT(ltd, idx) = NULL;
+ /*FIXME: only support ost pool for now */
+ if (ltd == &lod->lod_ost_descs) {
+ lod_ost_pool_remove(&lod->lod_pool_info, idx);
+ if (tgt_desc->ltd_active)
+ lod->lod_desc.ld_active_tgt_count--;
+ }
+ ltd->ltd_tgtnr--;
+ cfs_bitmap_clear(ltd->ltd_tgt_bitmap, idx);
+ ltd->ltd_death_row--;
}
- cfs_mutex_unlock(&lod->lod_mutex);
- cfs_up_read(&lod->lod_rw_sem);
+ mutex_unlock(<d->ltd_mutex);
+ up_read(<d->ltd_rw_sem);
- cfs_list_for_each_entry_safe(ost_desc, tmp, &kill, ltd_kill) {
+ list_for_each_entry_safe(tgt_desc, tmp, &kill, ltd_kill) {
int rc;
- cfs_list_del(&ost_desc->ltd_kill);
- /* XXX: remove from QoS structures */
- /* disconnect from OSP */
- rc = obd_disconnect(ost_desc->ltd_exp);
+ list_del(&tgt_desc->ltd_kill);
+ if (ltd == &lod->lod_ost_descs) {
+ /* remove from QoS structures */
+ rc = qos_del_tgt(lod, tgt_desc);
+ if (rc)
+ CERROR("%s: qos_del_tgt(%s) failed:"
+ "rc = %d\n",
+ lod2obd(lod)->obd_name,
+ obd_uuid2str(&tgt_desc->ltd_uuid),
+ rc);
+ }
+ rc = obd_disconnect(tgt_desc->ltd_exp);
if (rc)
- CERROR("%s: failed to disconnect %s (%d)\n",
+ CERROR("%s: failed to disconnect %s: rc = %d\n",
lod2obd(lod)->obd_name,
- obd_uuid2str(&ost_desc->ltd_uuid), rc);
- OBD_FREE_PTR(ost_desc);
+ obd_uuid2str(&tgt_desc->ltd_uuid), rc);
+ OBD_FREE_PTR(tgt_desc);
+ }
+ } else {
+ mutex_unlock(<d->ltd_mutex);
+ up_read(<d->ltd_rw_sem);
+ }
+}
+
+/**
+ * Expand size of target table.
+ *
+ * When the target table is full, we have to extend the table. To do so,
+ * we allocate new memory with some reserve, move data from the old table
+ * to the new one and release memory consumed by the old table.
+ * Notice we take ltd_rw_sem exclusively to ensure atomic switch.
+ *
+ * \param[in] ltd target table
+ * \param[in] newsize new size of the table
+ *
+ * \retval 0 on success
+ * \retval -ENOMEM if reallocation failed
+ */
+static int ltd_bitmap_resize(struct lod_tgt_descs *ltd, __u32 newsize)
+{
+ cfs_bitmap_t *new_bitmap, *old_bitmap = NULL;
+ int rc = 0;
+ ENTRY;
+
+ /* grab write reference on the lod. Relocating the array requires
+ * exclusive access */
+
+ down_write(<d->ltd_rw_sem);
+ if (newsize <= ltd->ltd_tgts_size)
+ /* someone else has already resize the array */
+ GOTO(out, rc = 0);
+
+ /* allocate new bitmap */
+ new_bitmap = CFS_ALLOCATE_BITMAP(newsize);
+ if (!new_bitmap)
+ GOTO(out, rc = -ENOMEM);
+
+ if (ltd->ltd_tgts_size > 0) {
+ /* the bitmap already exists, we need
+ * to copy data from old one */
+ cfs_bitmap_copy(new_bitmap, ltd->ltd_tgt_bitmap);
+ old_bitmap = ltd->ltd_tgt_bitmap;
+ }
+
+ ltd->ltd_tgts_size = newsize;
+ ltd->ltd_tgt_bitmap = new_bitmap;
+
+ if (old_bitmap)
+ CFS_FREE_BITMAP(old_bitmap);
+
+ CDEBUG(D_CONFIG, "tgt size: %d\n", ltd->ltd_tgts_size);
+
+ EXIT;
+out:
+ up_write(<d->ltd_rw_sem);
+ return rc;
+}
+
+/**
+ * Connect LOD to a new OSP and add it to the target table.
+ *
+ * Connect to the OSP device passed, initialize all the internal
+ * structures related to the device and add it to the target table.
+ *
+ * \param[in] env execution environment for this thread
+ * \param[in] lod LOD device to be connected to the new OSP
+ * \param[in] osp name of OSP device name to be added
+ * \param[in] index index of the new target
+ * \param[in] gen target's generation number
+ * \param[in] tgt_index OSP's group
+ * \param[in] type type of device (mdc or osc)
+ * \param[in] active state of OSP: 0 - inactive, 1 - active
+ *
+ * \retval 0 if added successfully
+ * \retval negative error number on failure
+ */
+int lod_add_device(const struct lu_env *env, struct lod_device *lod,
+ char *osp, unsigned index, unsigned gen, int tgt_index,
+ char *type, int active)
+{
+ struct obd_connect_data *data = NULL;
+ struct obd_export *exp = NULL;
+ struct obd_device *obd;
+ struct lu_device *ldev;
+ struct dt_device *d;
+ int rc;
+ struct lod_tgt_desc *tgt_desc;
+ struct lod_tgt_descs *ltd;
+ struct obd_uuid obd_uuid;
+ bool for_ost;
+ ENTRY;
+
+ CDEBUG(D_CONFIG, "osp:%s idx:%d gen:%d\n", osp, index, gen);
+
+ if (gen <= 0) {
+ CERROR("request to add OBD %s with invalid generation: %d\n",
+ osp, gen);
+ RETURN(-EINVAL);
+ }
+
+ obd_str2uuid(&obd_uuid, osp);
+
+ obd = class_find_client_obd(&obd_uuid, LUSTRE_OSP_NAME,
+ &lod->lod_dt_dev.dd_lu_dev.ld_obd->obd_uuid);
+ if (obd == NULL) {
+ CERROR("can't find %s device\n", osp);
+ RETURN(-EINVAL);
+ }
+
+ OBD_ALLOC_PTR(data);
+ if (data == NULL)
+ RETURN(-ENOMEM);
+
+ data->ocd_connect_flags = OBD_CONNECT_INDEX | OBD_CONNECT_VERSION;
+ data->ocd_version = LUSTRE_VERSION_CODE;
+ data->ocd_index = index;
+
+ if (strcmp(LUSTRE_OSC_NAME, type) == 0) {
+ for_ost = true;
+ data->ocd_connect_flags |= OBD_CONNECT_AT |
+ OBD_CONNECT_FULL20 |
+ OBD_CONNECT_INDEX |
+#ifdef HAVE_LRU_RESIZE_SUPPORT
+ OBD_CONNECT_LRU_RESIZE |
+#endif
+ OBD_CONNECT_MDS |
+ OBD_CONNECT_REQPORTAL |
+ OBD_CONNECT_SKIP_ORPHAN |
+ OBD_CONNECT_FID |
+ OBD_CONNECT_LVB_TYPE |
+ OBD_CONNECT_VERSION |
+ OBD_CONNECT_PINGLESS |
+ OBD_CONNECT_LFSCK;
+
+ data->ocd_group = tgt_index;
+ ltd = &lod->lod_ost_descs;
+ } else {
+ struct obd_import *imp = obd->u.cli.cl_import;
+
+ for_ost = false;
+ data->ocd_ibits_known = MDS_INODELOCK_UPDATE;
+ data->ocd_connect_flags |= OBD_CONNECT_ACL |
+ OBD_CONNECT_IBITS |
+ OBD_CONNECT_MDS_MDS |
+ OBD_CONNECT_FID |
+ OBD_CONNECT_AT |
+ OBD_CONNECT_FULL20 |
+ OBD_CONNECT_LFSCK;
+ spin_lock(&imp->imp_lock);
+ imp->imp_server_timeout = 1;
+ spin_unlock(&imp->imp_lock);
+ imp->imp_client->cli_request_portal = OUT_PORTAL;
+ CDEBUG(D_OTHER, "%s: Set 'mds' portal and timeout\n",
+ obd->obd_name);
+ ltd = &lod->lod_mdt_descs;
+ }
+
+ rc = obd_connect(env, &exp, obd, &obd->obd_uuid, data, NULL);
+ OBD_FREE_PTR(data);
+ if (rc) {
+ CERROR("%s: cannot connect to next dev %s (%d)\n",
+ obd->obd_name, osp, rc);
+ GOTO(out_free, rc);
+ }
+
+ LASSERT(obd->obd_lu_dev);
+ LASSERT(obd->obd_lu_dev->ld_site == lod->lod_dt_dev.dd_lu_dev.ld_site);
+
+ ldev = obd->obd_lu_dev;
+ d = lu2dt_dev(ldev);
+
+ /* Allocate ost descriptor and fill it */
+ OBD_ALLOC_PTR(tgt_desc);
+ if (!tgt_desc)
+ GOTO(out_conn, rc = -ENOMEM);
+
+ tgt_desc->ltd_tgt = d;
+ tgt_desc->ltd_exp = exp;
+ tgt_desc->ltd_uuid = obd->u.cli.cl_target_uuid;
+ tgt_desc->ltd_gen = gen;
+ tgt_desc->ltd_index = index;
+ tgt_desc->ltd_active = active;
+
+ lod_getref(ltd);
+ if (index >= ltd->ltd_tgts_size) {
+ /* we have to increase the size of the lod_osts array */
+ __u32 newsize;
+
+ newsize = max(ltd->ltd_tgts_size, (__u32)2);
+ while (newsize < index + 1)
+ newsize = newsize << 1;
+
+ /* lod_bitmap_resize() needs lod_rw_sem
+ * which we hold with th reference */
+ lod_putref(lod, ltd);
+
+ rc = ltd_bitmap_resize(ltd, newsize);
+ if (rc)
+ GOTO(out_desc, rc);
+
+ lod_getref(ltd);
+ }
+
+ mutex_lock(<d->ltd_mutex);
+ if (cfs_bitmap_check(ltd->ltd_tgt_bitmap, index)) {
+ CERROR("%s: device %d is registered already\n", obd->obd_name,
+ index);
+ GOTO(out_mutex, rc = -EEXIST);
+ }
+
+ if (ltd->ltd_tgt_idx[index / TGT_PTRS_PER_BLOCK] == NULL) {
+ OBD_ALLOC_PTR(ltd->ltd_tgt_idx[index / TGT_PTRS_PER_BLOCK]);
+ if (ltd->ltd_tgt_idx[index / TGT_PTRS_PER_BLOCK] == NULL) {
+ CERROR("can't allocate index to add %s\n",
+ obd->obd_name);
+ GOTO(out_mutex, rc = -ENOMEM);
}
+ }
+
+ if (for_ost) {
+ /* pool and qos are not supported for MDS stack yet */
+ rc = lod_ost_pool_add(&lod->lod_pool_info, index,
+ lod->lod_osts_size);
+ if (rc) {
+ CERROR("%s: can't set up pool, failed with %d\n",
+ obd->obd_name, rc);
+ GOTO(out_mutex, rc);
+ }
+
+ rc = qos_add_tgt(lod, tgt_desc);
+ if (rc) {
+ CERROR("%s: qos_add_tgt failed with %d\n",
+ obd->obd_name, rc);
+ GOTO(out_pool, rc);
+ }
+
+ /* The new OST is now a full citizen */
+ if (index >= lod->lod_desc.ld_tgt_count)
+ lod->lod_desc.ld_tgt_count = index + 1;
+ if (active)
+ lod->lod_desc.ld_active_tgt_count++;
+ }
+
+ LTD_TGT(ltd, index) = tgt_desc;
+ cfs_bitmap_set(ltd->ltd_tgt_bitmap, index);
+ ltd->ltd_tgtnr++;
+ mutex_unlock(<d->ltd_mutex);
+ lod_putref(lod, ltd);
+ if (lod->lod_recovery_completed)
+ ldev->ld_ops->ldo_recovery_complete(env, ldev);
+
+ if (!for_ost && lod->lod_initialized) {
+ rc = lod_sub_init_llog(env, lod, tgt_desc->ltd_tgt);
+ if (rc != 0) {
+ CERROR("%s: cannot start llog on %s:rc = %d\n",
+ lod2obd(lod)->obd_name, osp, rc);
+ GOTO(out_pool, rc);
+ }
+ }
+
+ rc = lfsck_add_target(env, lod->lod_child, d, exp, index, for_ost);
+ if (rc != 0) {
+ CERROR("Fail to add LFSCK target: name = %s, type = %s, "
+ "index = %u, rc = %d\n", osp, type, index, rc);
+ GOTO(out_fini_llog, rc);
+ }
+ RETURN(rc);
+out_fini_llog:
+ lod_sub_fini_llog(env, tgt_desc->ltd_tgt,
+ tgt_desc->ltd_recovery_thread);
+out_pool:
+ lod_ost_pool_remove(&lod->lod_pool_info, index);
+out_mutex:
+ mutex_unlock(<d->ltd_mutex);
+ lod_putref(lod, ltd);
+out_desc:
+ OBD_FREE_PTR(tgt_desc);
+out_conn:
+ obd_disconnect(exp);
+out_free:
+ return rc;
+}
+
+/**
+ * Schedule target removal from the target table.
+ *
+ * Mark the device as dead. The device is not removed here because it may
+ * still be in use. The device will be removed in lod_putref() when the
+ * last reference is released.
+ *
+ * \param[in] env execution environment for this thread
+ * \param[in] lod LOD device the target table belongs to
+ * \param[in] ltd target table
+ * \param[in] idx index of the target
+ * \param[in] for_ost type of the target: 0 - MDT, 1 - OST
+ */
+static void __lod_del_device(const struct lu_env *env, struct lod_device *lod,
+ struct lod_tgt_descs *ltd, unsigned idx,
+ bool for_ost)
+{
+ LASSERT(LTD_TGT(ltd, idx));
+
+ lfsck_del_target(env, lod->lod_child, LTD_TGT(ltd, idx)->ltd_tgt,
+ idx, for_ost);
+
+ if (!for_ost && LTD_TGT(ltd, idx)->ltd_recovery_thread != NULL) {
+ struct ptlrpc_thread *thread;
+
+ thread = LTD_TGT(ltd, idx)->ltd_recovery_thread;
+ OBD_FREE_PTR(thread);
+ }
+
+ if (LTD_TGT(ltd, idx)->ltd_reap == 0) {
+ LTD_TGT(ltd, idx)->ltd_reap = 1;
+ ltd->ltd_death_row++;
+ }
+}
+
+/**
+ * Schedule removal of all the targets from the given target table.
+ *
+ * See more details in the description for __lod_del_device()
+ *
+ * \param[in] env execution environment for this thread
+ * \param[in] lod LOD device the target table belongs to
+ * \param[in] ltd target table
+ * \param[in] for_ost type of the target: MDT or OST
+ *
+ * \retval 0 always
+ */
+int lod_fini_tgt(const struct lu_env *env, struct lod_device *lod,
+ struct lod_tgt_descs *ltd, bool for_ost)
+{
+ unsigned int idx;
+
+ if (ltd->ltd_tgts_size <= 0)
+ return 0;
+ lod_getref(ltd);
+ mutex_lock(<d->ltd_mutex);
+ cfs_foreach_bit(ltd->ltd_tgt_bitmap, idx)
+ __lod_del_device(env, lod, ltd, idx, for_ost);
+ mutex_unlock(<d->ltd_mutex);
+ lod_putref(lod, ltd);
+ CFS_FREE_BITMAP(ltd->ltd_tgt_bitmap);
+ for (idx = 0; idx < TGT_PTRS; idx++) {
+ if (ltd->ltd_tgt_idx[idx])
+ OBD_FREE_PTR(ltd->ltd_tgt_idx[idx]);
+ }
+ ltd->ltd_tgts_size = 0;
+ return 0;
+}
+
+/**
+ * Remove device by name.
+ *
+ * Remove a device identified by \a osp from the target table. Given
+ * the device can be in use, the real deletion happens in lod_putref().
+ *
+ * \param[in] env execution environment for this thread
+ * \param[in] lod LOD device to be connected to the new OSP
+ * \param[in] ltd target table
+ * \param[in] osp name of OSP device to be removed
+ * \param[in] idx index of the target
+ * \param[in] gen generation number, not used currently
+ * \param[in] for_ost type of the target: 0 - MDT, 1 - OST
+ *
+ * \retval 0 if the device was scheduled for removal
+ * \retval -EINVAL if no device was found
+ */
+int lod_del_device(const struct lu_env *env, struct lod_device *lod,
+ struct lod_tgt_descs *ltd, char *osp, unsigned idx,
+ unsigned gen, bool for_ost)
+{
+ struct obd_device *obd;
+ int rc = 0;
+ struct obd_uuid uuid;
+ ENTRY;
+
+ CDEBUG(D_CONFIG, "osp:%s idx:%d gen:%d\n", osp, idx, gen);
+
+ obd_str2uuid(&uuid, osp);
+
+ obd = class_find_client_obd(&uuid, LUSTRE_OSP_NAME,
+ &lod->lod_dt_dev.dd_lu_dev.ld_obd->obd_uuid);
+ if (obd == NULL) {
+ CERROR("can't find %s device\n", osp);
+ RETURN(-EINVAL);
+ }
+
+ if (gen <= 0) {
+ CERROR("%s: request to remove OBD %s with invalid generation %d"
+ "\n", obd->obd_name, osp, gen);
+ RETURN(-EINVAL);
+ }
+
+ obd_str2uuid(&uuid, osp);
+
+ lod_getref(ltd);
+ mutex_lock(<d->ltd_mutex);
+ /* check that the index is allocated in the bitmap */
+ if (!cfs_bitmap_check(ltd->ltd_tgt_bitmap, idx) ||
+ !LTD_TGT(ltd, idx)) {
+ CERROR("%s: device %d is not set up\n", obd->obd_name, idx);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ /* check that the UUID matches */
+ if (!obd_uuid_equals(&uuid, <D_TGT(ltd, idx)->ltd_uuid)) {
+ CERROR("%s: LOD target UUID %s at index %d does not match %s\n",
+ obd->obd_name, obd_uuid2str(<D_TGT(ltd,idx)->ltd_uuid),
+ idx, osp);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ __lod_del_device(env, lod, ltd, idx, for_ost);
+ EXIT;
+out:
+ mutex_unlock(<d->ltd_mutex);
+ lod_putref(lod, ltd);
+ return(rc);
+}
+
+/**
+ * Resize per-thread storage to hold specified size.
+ *
+ * A helper function to resize per-thread temporary storage. This storage
+ * is used to process LOV/LVM EAs and may be quite large. We do not want to
+ * allocate/release it every time, so instead we put it into the env and
+ * reallocate on demand. The memory is released when the correspondent thread
+ * is finished.
+ *
+ * \param[in] info LOD-specific storage in the environment
+ * \param[in] size new size to grow the buffer to
+
+ * \retval 0 on success, -ENOMEM if reallocation failed
+ */
+int lod_ea_store_resize(struct lod_thread_info *info, size_t size)
+{
+ __u32 round = size_roundup_power2(size);
+
+ LASSERT(round <=
+ lov_mds_md_size(LOV_MAX_STRIPE_COUNT, LOV_MAGIC_V3));
+ if (info->lti_ea_store) {
+ LASSERT(info->lti_ea_store_size);
+ LASSERT(info->lti_ea_store_size < round);
+ CDEBUG(D_INFO, "EA store size %d is not enough, need %d\n",
+ info->lti_ea_store_size, round);
+ OBD_FREE_LARGE(info->lti_ea_store, info->lti_ea_store_size);
+ info->lti_ea_store = NULL;
+ info->lti_ea_store_size = 0;
+ }
+
+ OBD_ALLOC_LARGE(info->lti_ea_store, round);
+ if (info->lti_ea_store == NULL)
+ RETURN(-ENOMEM);
+ info->lti_ea_store_size = round;
+ RETURN(0);
+}
+
+/**
+ * Make LOV EA for striped object.
+ *
+ * Generate striping information and store it in the LOV EA of the given
+ * object. The caller must ensure nobody else is calling the function
+ * against the object concurrently. The transaction must be started.
+ * FLDB service must be running as well; it's used to map FID to the target,
+ * which is stored in LOV EA.
+ *
+ * \param[in] env execution environment for this thread
+ * \param[in] lo LOD object
+ * \param[in] th transaction handle
+ *
+ * \retval 0 if LOV EA is stored successfully
+ * \retval negative error number on failure
+ */
+int lod_generate_and_set_lovea(const struct lu_env *env,
+ struct lod_object *lo, struct thandle *th)
+{
+ struct lod_thread_info *info = lod_env_info(env);
+ struct dt_object *next = dt_object_child(&lo->ldo_obj);
+ const struct lu_fid *fid = lu_object_fid(&lo->ldo_obj.do_lu);
+ struct lov_mds_md_v1 *lmm;
+ struct lov_ost_data_v1 *objs;
+ __u32 magic;
+ int i, rc;
+ size_t lmm_size;
+ ENTRY;
+
+ LASSERT(lo);
+
+ magic = lo->ldo_pool != NULL ? LOV_MAGIC_V3 : LOV_MAGIC_V1;
+ lmm_size = lov_mds_md_size(lo->ldo_stripenr, magic);
+ if (info->lti_ea_store_size < lmm_size) {
+ rc = lod_ea_store_resize(info, lmm_size);
+ if (rc)
+ RETURN(rc);
+ }
+
+ if (lo->ldo_pattern == 0) /* default striping */
+ lo->ldo_pattern = LOV_PATTERN_RAID0;
+
+ lmm = info->lti_ea_store;
+
+ lmm->lmm_magic = cpu_to_le32(magic);
+ lmm->lmm_pattern = cpu_to_le32(lo->ldo_pattern);
+ fid_to_lmm_oi(fid, &lmm->lmm_oi);
+ if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_LMMOI))
+ lmm->lmm_oi.oi.oi_id++;
+ lmm_oi_cpu_to_le(&lmm->lmm_oi, &lmm->lmm_oi);
+ lmm->lmm_stripe_size = cpu_to_le32(lo->ldo_stripe_size);
+ lmm->lmm_stripe_count = cpu_to_le16(lo->ldo_stripenr);
+ if (lo->ldo_pattern & LOV_PATTERN_F_RELEASED)
+ lmm->lmm_stripe_count = cpu_to_le16(lo->ldo_released_stripenr);
+ lmm->lmm_layout_gen = 0;
+ if (magic == LOV_MAGIC_V1) {
+ objs = &lmm->lmm_objects[0];
} else {
- cfs_mutex_unlock(&lod->lod_mutex);
- cfs_up_read(&lod->lod_rw_sem);
+ struct lov_mds_md_v3 *v3 = (struct lov_mds_md_v3 *) lmm;
+ size_t cplen = strlcpy(v3->lmm_pool_name, lo->ldo_pool,
+ sizeof(v3->lmm_pool_name));
+ if (cplen >= sizeof(v3->lmm_pool_name))
+ RETURN(-E2BIG);
+ objs = &v3->lmm_objects[0];
+ }
+
+ for (i = 0; i < lo->ldo_stripenr; i++) {
+ struct lu_fid *fid = &info->lti_fid;
+ struct lod_device *lod;
+ __u32 index;
+ int type = LU_SEQ_RANGE_OST;
+
+ lod = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
+ LASSERT(lo->ldo_stripe[i]);
+
+ *fid = *lu_object_fid(&lo->ldo_stripe[i]->do_lu);
+ if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_MULTIPLE_REF)) {
+ if (cfs_fail_val == 0)
+ cfs_fail_val = fid->f_oid;
+ else
+ fid->f_oid = cfs_fail_val;
+ }
+
+ rc = fid_to_ostid(fid, &info->lti_ostid);
+ LASSERT(rc == 0);
+
+ ostid_cpu_to_le(&info->lti_ostid, &objs[i].l_ost_oi);
+ objs[i].l_ost_gen = cpu_to_le32(0);
+ rc = lod_fld_lookup(env, lod, fid, &index, &type);
+ if (rc < 0) {
+ CERROR("%s: Can not locate "DFID": rc = %d\n",
+ lod2obd(lod)->obd_name, PFID(fid), rc);
+ lod_object_free_striping(env, lo);
+ RETURN(rc);
+ }
+ objs[i].l_ost_idx = cpu_to_le32(index);
}
+
+ info->lti_buf.lb_buf = lmm;
+ info->lti_buf.lb_len = lmm_size;
+ rc = lod_sub_object_xattr_set(env, next, &info->lti_buf, XATTR_NAME_LOV,
+ 0, th);
+ if (rc < 0) {
+ lod_object_free_striping(env, lo);
+ RETURN(rc);
+ }
+
+ RETURN(rc);
}
+/**
+ * Get LOV EA.
+ *
+ * Fill lti_ea_store buffer in the environment with a value for the given
+ * EA. The buffer is reallocated if the value doesn't fit.
+ *
+ * \param[in,out] env execution environment for this thread
+ * .lti_ea_store buffer is filled with EA's value
+ * \param[in] lo LOD object
+ * \param[in] name name of the EA
+ *
+ * \retval 0 if EA is fetched successfully
+ * \retval negative error number on failure
+ */
+int lod_get_ea(const struct lu_env *env, struct lod_object *lo,
+ const char *name)
+{
+ struct lod_thread_info *info = lod_env_info(env);
+ struct dt_object *next = dt_object_child(&lo->ldo_obj);
+ int rc;
+ ENTRY;
+
+ LASSERT(info);
+
+ if (unlikely(info->lti_ea_store == NULL)) {
+ /* just to enter in allocation block below */
+ rc = -ERANGE;
+ } else {
+repeat:
+ info->lti_buf.lb_buf = info->lti_ea_store;
+ info->lti_buf.lb_len = info->lti_ea_store_size;
+ rc = dt_xattr_get(env, next, &info->lti_buf, name);
+ }
+
+ /* if object is not striped or inaccessible */
+ if (rc == -ENODATA || rc == -ENOENT)
+ RETURN(0);
+
+ if (rc == -ERANGE) {
+ /* EA doesn't fit, reallocate new buffer */
+ rc = dt_xattr_get(env, next, &LU_BUF_NULL, name);
+ if (rc == -ENODATA || rc == -ENOENT)
+ RETURN(0);
+ else if (rc < 0)
+ RETURN(rc);
+
+ LASSERT(rc > 0);
+ rc = lod_ea_store_resize(info, rc);
+ if (rc)
+ RETURN(rc);
+ goto repeat;
+ }
+
+ RETURN(rc);
+}
+
+/**
+ * Verify the target index is present in the current configuration.
+ *
+ * \param[in] md LOD device where the target table is stored
+ * \param[in] idx target's index
+ *
+ * \retval 0 if the index is present
+ * \retval -EINVAL if not
+ */
+static int validate_lod_and_idx(struct lod_device *md, __u32 idx)
+{
+ if (unlikely(idx >= md->lod_ost_descs.ltd_tgts_size ||
+ !cfs_bitmap_check(md->lod_ost_bitmap, idx))) {
+ CERROR("%s: bad idx: %d of %d\n", lod2obd(md)->obd_name, idx,
+ md->lod_ost_descs.ltd_tgts_size);
+ return -EINVAL;
+ }
+
+ if (unlikely(OST_TGT(md, idx) == NULL)) {
+ CERROR("%s: bad lod_tgt_desc for idx: %d\n",
+ lod2obd(md)->obd_name, idx);
+ return -EINVAL;
+ }
+
+ if (unlikely(OST_TGT(md, idx)->ltd_ost == NULL)) {
+ CERROR("%s: invalid lod device, for idx: %d\n",
+ lod2obd(md)->obd_name , idx);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/**
+ * Instantiate objects for stripes.
+ *
+ * Allocate and initialize LU-objects representing the stripes. The number
+ * of the stripes (ldo_stripenr) must be initialized already. The caller
+ * must ensure nobody else is calling the function on the object at the same
+ * time. FLDB service must be running to be able to map a FID to the targets
+ * and find appropriate device representing that target.
+ *
+ * \param[in] env execution environment for this thread
+ * \param[in,out] lo LOD object
+ * \param[in] objs an array of IDs to creates the objects from
+ *
+ * \retval 0 if the objects are instantiated successfully
+ * \retval negative error number on failure
+ */
+int lod_initialize_objects(const struct lu_env *env, struct lod_object *lo,
+ struct lov_ost_data_v1 *objs)
+{
+ struct lod_thread_info *info = lod_env_info(env);
+ struct lod_device *md;
+ struct lu_object *o, *n;
+ struct lu_device *nd;
+ struct dt_object **stripe;
+ int stripe_len;
+ int i, rc = 0;
+ __u32 idx;
+ ENTRY;
+
+ LASSERT(lo != NULL);
+ md = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
+ LASSERT(lo->ldo_stripe == NULL);
+ LASSERT(lo->ldo_stripenr > 0);
+ LASSERT(lo->ldo_stripe_size > 0);
+
+ stripe_len = lo->ldo_stripenr;
+ OBD_ALLOC(stripe, sizeof(stripe[0]) * stripe_len);
+ if (stripe == NULL)
+ RETURN(-ENOMEM);
+
+ for (i = 0; i < lo->ldo_stripenr; i++) {
+ if (unlikely(lovea_slot_is_dummy(&objs[i])))
+ continue;
+
+ ostid_le_to_cpu(&objs[i].l_ost_oi, &info->lti_ostid);
+ idx = le32_to_cpu(objs[i].l_ost_idx);
+ rc = ostid_to_fid(&info->lti_fid, &info->lti_ostid, idx);
+ if (rc != 0)
+ GOTO(out, rc);
+ LASSERTF(fid_is_sane(&info->lti_fid), ""DFID" insane!\n",
+ PFID(&info->lti_fid));
+ lod_getref(&md->lod_ost_descs);
+
+ rc = validate_lod_and_idx(md, idx);
+ if (unlikely(rc != 0)) {
+ lod_putref(md, &md->lod_ost_descs);
+ GOTO(out, rc);
+ }
+
+ nd = &OST_TGT(md,idx)->ltd_ost->dd_lu_dev;
+ lod_putref(md, &md->lod_ost_descs);
+
+ /* In the function below, .hs_keycmp resolves to
+ * u_obj_hop_keycmp() */
+ /* coverity[overrun-buffer-val] */
+ o = lu_object_find_at(env, nd, &info->lti_fid, NULL);
+ if (IS_ERR(o))
+ GOTO(out, rc = PTR_ERR(o));
+
+ n = lu_object_locate(o->lo_header, nd->ld_type);
+ LASSERT(n);
+
+ stripe[i] = container_of(n, struct dt_object, do_lu);
+ }
+
+out:
+ if (rc != 0) {
+ for (i = 0; i < stripe_len; i++)
+ if (stripe[i] != NULL)
+ lu_object_put(env, &stripe[i]->do_lu);
+
+ OBD_FREE(stripe, sizeof(stripe[0]) * stripe_len);
+ lo->ldo_stripenr = 0;
+ } else {
+ lo->ldo_stripe = stripe;
+ lo->ldo_stripes_allocated = stripe_len;
+ }
+
+ RETURN(rc);
+}
+
+/**
+ * Instantiate objects for striping.
+ *
+ * Parse striping information in \a buf and instantiate the objects
+ * representing the stripes.
+ *
+ * \param[in] env execution environment for this thread
+ * \param[in] lo LOD object
+ * \param[in] buf buffer storing LOV EA to parse
+ *
+ * \retval 0 if parsing and objects creation succeed
+ * \retval negative error number on failure
+ */
+int lod_parse_striping(const struct lu_env *env, struct lod_object *lo,
+ const struct lu_buf *buf)
+{
+ struct lov_mds_md_v1 *lmm;
+ struct lov_ost_data_v1 *objs;
+ __u32 magic;
+ __u32 pattern;
+ int rc = 0;
+ ENTRY;
+
+ LASSERT(buf);
+ LASSERT(buf->lb_buf);
+ LASSERT(buf->lb_len);
+
+ lmm = (struct lov_mds_md_v1 *) buf->lb_buf;
+ magic = le32_to_cpu(lmm->lmm_magic);
+ pattern = le32_to_cpu(lmm->lmm_pattern);
+
+ if (magic != LOV_MAGIC_V1 && magic != LOV_MAGIC_V3)
+ GOTO(out, rc = -EINVAL);
+ if (lov_pattern(pattern) != LOV_PATTERN_RAID0)
+ GOTO(out, rc = -EINVAL);
+
+ lo->ldo_pattern = pattern;
+ lo->ldo_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
+ lo->ldo_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
+ lo->ldo_stripenr = le16_to_cpu(lmm->lmm_stripe_count);
+ /* released file stripenr fixup. */
+ if (pattern & LOV_PATTERN_F_RELEASED)
+ lo->ldo_stripenr = 0;
+
+ LASSERT(buf->lb_len >= lov_mds_md_size(lo->ldo_stripenr, magic));
+
+ if (magic == LOV_MAGIC_V3) {
+ struct lov_mds_md_v3 *v3 = (struct lov_mds_md_v3 *) lmm;
+ objs = &v3->lmm_objects[0];
+ lod_object_set_pool(lo, v3->lmm_pool_name);
+ } else {
+ objs = &lmm->lmm_objects[0];
+ }
+
+ if (lo->ldo_stripenr > 0)
+ rc = lod_initialize_objects(env, lo, objs);
+
+out:
+ RETURN(rc);
+}
+
+/**
+ * Initialize the object representing the stripes.
+ *
+ * Unless the stripes are initialized already, fetch LOV (for regular
+ * objects) or LMV (for directory objects) EA and call lod_parse_striping()
+ * to instantiate the objects representing the stripes.
+ *
+ * \param[in] env execution environment for this thread
+ * \param[in,out] lo LOD object
+ *
+ * \retval 0 if parsing and object creation succeed
+ * \retval negative error number on failure
+ */
+int lod_load_striping_locked(const struct lu_env *env, struct lod_object *lo)
+{
+ struct lod_thread_info *info = lod_env_info(env);
+ struct lu_buf *buf = &info->lti_buf;
+ struct dt_object *next = dt_object_child(&lo->ldo_obj);
+ int rc = 0;
+ ENTRY;
+
+ /* already initialized? */
+ if (lo->ldo_stripe != NULL)
+ GOTO(out, rc = 0);
+
+ if (!dt_object_exists(next))
+ GOTO(out, rc = 0);
+
+ /* Do not load stripe for slaves of striped dir */
+ if (lo->ldo_dir_slave_stripe)
+ GOTO(out, rc = 0);
+
+ if (S_ISREG(lu_object_attr(lod2lu_obj(lo)))) {
+ rc = lod_get_lov_ea(env, lo);
+ if (rc <= 0)
+ GOTO(out, rc);
+ /*
+ * there is LOV EA (striping information) in this object
+ * let's parse it and create in-core objects for the stripes
+ */
+ buf->lb_buf = info->lti_ea_store;
+ buf->lb_len = info->lti_ea_store_size;
+ rc = lod_parse_striping(env, lo, buf);
+ } else if (S_ISDIR(lu_object_attr(lod2lu_obj(lo)))) {
+ rc = lod_get_lmv_ea(env, lo);
+ if (rc < (typeof(rc))sizeof(struct lmv_mds_md_v1))
+ GOTO(out, rc = rc > 0 ? -EINVAL : rc);
+
+ buf->lb_buf = info->lti_ea_store;
+ buf->lb_len = info->lti_ea_store_size;
+ if (rc == sizeof(struct lmv_mds_md_v1)) {
+ rc = lod_load_lmv_shards(env, lo, buf, true);
+ if (buf->lb_buf != info->lti_ea_store) {
+ OBD_FREE_LARGE(info->lti_ea_store,
+ info->lti_ea_store_size);
+ info->lti_ea_store = buf->lb_buf;
+ info->lti_ea_store_size = buf->lb_len;
+ }
+
+ if (rc < 0)
+ GOTO(out, rc);
+ }
+
+ /*
+ * there is LOV EA (striping information) in this object
+ * let's parse it and create in-core objects for the stripes
+ */
+ rc = lod_parse_dir_striping(env, lo, buf);
+ }
+
+ if (rc == 0)
+ lo->ldo_striping_cached = 1;
+out:
+ RETURN(rc);
+}
+
+/**
+ * A generic function to initialize the stripe objects.
+ *
+ * A protected version of lod_load_striping_locked() - load the striping
+ * information from storage, parse that and instantiate LU objects to
+ * represent the stripes. The LOD object \a lo supplies a pointer to the
+ * next sub-object in the LU stack so we can lock it. Also use \a lo to
+ * return an array of references to the newly instantiated objects.
+ *
+ * \param[in] env execution environment for this thread
+ * \param[in,out] lo LOD object, where striping is stored and
+ * which gets an array of references
+ *
+ * \retval 0 if parsing and object creation succeed
+ * \retval negative error number on failure
+ **/
+int lod_load_striping(const struct lu_env *env, struct lod_object *lo)
+{
+ struct dt_object *next = dt_object_child(&lo->ldo_obj);
+ int rc = 0;
+
+ /* currently this code is supposed to be called from declaration
+ * phase only, thus the object is not expected to be locked by caller */
+ dt_write_lock(env, next, 0);
+ rc = lod_load_striping_locked(env, lo);
+ dt_write_unlock(env, next);
+ return rc;
+}
+
+/**
+ * Verify striping.
+ *
+ * Check the validity of all fields including the magic, stripe size,
+ * stripe count, stripe offset and that the pool is present. Also check
+ * that each target index points to an existing target. The additional
+ * \a is_from_disk turns additional checks. In some cases zero fields
+ * are allowed (like pattern=0).
+ *
+ * \param[in] d LOD device
+ * \param[in] buf buffer with LOV EA to verify
+ * \param[in] is_from_disk 0 - from user, allow some fields to be 0
+ * 1 - from disk, do not allow
+ *
+ * \retval 0 if the striping is valid
+ * \retval -EINVAL if striping is invalid
+ */
+int lod_verify_striping(struct lod_device *d, const struct lu_buf *buf,
+ bool is_from_disk)
+{
+ struct lov_user_md_v1 *lum;
+ struct lov_user_md_v3 *lum3;
+ struct pool_desc *pool = NULL;
+ __u32 magic;
+ __u32 stripe_size;
+ __u16 stripe_count;
+ __u16 stripe_offset;
+ size_t lum_size;
+ int rc = 0;
+ ENTRY;
+
+ lum = buf->lb_buf;
+
+ LASSERT(sizeof(*lum) < sizeof(*lum3));
+
+ if (buf->lb_len < sizeof(*lum)) {
+ CDEBUG(D_IOCTL, "buf len %zu too small for lov_user_md\n",
+ buf->lb_len);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ magic = le32_to_cpu(lum->lmm_magic);
+ if (magic != LOV_USER_MAGIC_V1 &&
+ magic != LOV_USER_MAGIC_V3 &&
+ magic != LOV_MAGIC_V1_DEF &&
+ magic != LOV_MAGIC_V3_DEF) {
+ CDEBUG(D_IOCTL, "bad userland LOV MAGIC: %#x\n", magic);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ /* the user uses "0" for default stripe pattern normally. */
+ if (!is_from_disk && lum->lmm_pattern == 0)
+ lum->lmm_pattern = cpu_to_le32(LOV_PATTERN_RAID0);
+
+ if (le32_to_cpu(lum->lmm_pattern) != LOV_PATTERN_RAID0) {
+ CDEBUG(D_IOCTL, "bad userland stripe pattern: %#x\n",
+ le32_to_cpu(lum->lmm_pattern));
+ GOTO(out, rc = -EINVAL);
+ }
+
+ /* 64kB is the largest common page size we see (ia64), and matches the
+ * check in lfs */
+ stripe_size = le32_to_cpu(lum->lmm_stripe_size);
+ if (stripe_size & (LOV_MIN_STRIPE_SIZE - 1)) {
+ CDEBUG(D_IOCTL, "stripe size %u not a multiple of %u\n",
+ stripe_size, LOV_MIN_STRIPE_SIZE);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ stripe_offset = le16_to_cpu(lum->lmm_stripe_offset);
+ if (stripe_offset != LOV_OFFSET_DEFAULT) {
+ /* if offset is not within valid range [0, osts_size) */
+ if (stripe_offset >= d->lod_osts_size) {
+ CDEBUG(D_IOCTL, "stripe offset %u >= bitmap size %u\n",
+ stripe_offset, d->lod_osts_size);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ /* if lmm_stripe_offset is *not* in bitmap */
+ if (!cfs_bitmap_check(d->lod_ost_bitmap, stripe_offset)) {
+ CDEBUG(D_IOCTL, "stripe offset %u not in bitmap\n",
+ stripe_offset);
+ GOTO(out, rc = -EINVAL);
+ }
+ }
+
+ if (magic == LOV_USER_MAGIC_V1 || magic == LOV_MAGIC_V1_DEF)
+ lum_size = offsetof(struct lov_user_md_v1,
+ lmm_objects[0]);
+ else if (magic == LOV_USER_MAGIC_V3 || magic == LOV_MAGIC_V3_DEF)
+ lum_size = offsetof(struct lov_user_md_v3,
+ lmm_objects[0]);
+ else
+ GOTO(out, rc = -EINVAL);
+
+ stripe_count = le16_to_cpu(lum->lmm_stripe_count);
+ if (buf->lb_len != lum_size) {
+ CDEBUG(D_IOCTL, "invalid buf len %zu for lov_user_md with "
+ "magic %#x and stripe_count %u\n",
+ buf->lb_len, magic, stripe_count);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ if (!(magic == LOV_USER_MAGIC_V3 || magic == LOV_MAGIC_V3_DEF))
+ goto out;
+
+ lum3 = buf->lb_buf;
+ if (buf->lb_len < sizeof(*lum3)) {
+ CDEBUG(D_IOCTL, "buf len %zu too small for lov_user_md_v3\n",
+ buf->lb_len);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ /* In the function below, .hs_keycmp resolves to
+ * pool_hashkey_keycmp() */
+ /* coverity[overrun-buffer-val] */
+ pool = lod_find_pool(d, lum3->lmm_pool_name);
+ if (pool == NULL)
+ goto out;
+
+ if (stripe_offset != LOV_OFFSET_DEFAULT) {
+ rc = lod_check_index_in_pool(stripe_offset, pool);
+ if (rc < 0)
+ GOTO(out, rc = -EINVAL);
+ }
+
+ if (is_from_disk && stripe_count > pool_tgt_count(pool)) {
+ CDEBUG(D_IOCTL,
+ "stripe count %u > # OSTs %u in the pool\n",
+ stripe_count, pool_tgt_count(pool));
+ GOTO(out, rc = -EINVAL);
+ }
+
+out:
+ if (pool != NULL)
+ lod_pool_putref(pool);
+
+ RETURN(rc);
+}
+
+void lod_fix_desc_stripe_size(__u64 *val)
+{
+ if (*val < LOV_MIN_STRIPE_SIZE) {
+ if (*val != 0)
+ LCONSOLE_INFO("Increasing default stripe size to "
+ "minimum value %u\n",
+ LOV_DESC_STRIPE_SIZE_DEFAULT);
+ *val = LOV_DESC_STRIPE_SIZE_DEFAULT;
+ } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
+ *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
+ LCONSOLE_WARN("Changing default stripe size to "LPU64" (a "
+ "multiple of %u)\n",
+ *val, LOV_MIN_STRIPE_SIZE);
+ }
+}
+
+void lod_fix_desc_stripe_count(__u32 *val)
+{
+ if (*val == 0)
+ *val = 1;
+}
+
+void lod_fix_desc_pattern(__u32 *val)
+{
+ /* from lov_setstripe */
+ if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
+ LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
+ *val = 0;
+ }
+}
+
+void lod_fix_desc_qos_maxage(__u32 *val)
+{
+ /* fix qos_maxage */
+ if (*val == 0)
+ *val = LOV_DESC_QOS_MAXAGE_DEFAULT;
+}
+
+/**
+ * Used to fix insane default striping.
+ *
+ * \param[in] desc striping description
+ */
+void lod_fix_desc(struct lov_desc *desc)
+{
+ lod_fix_desc_stripe_size(&desc->ld_default_stripe_size);
+ lod_fix_desc_stripe_count(&desc->ld_default_stripe_count);
+ lod_fix_desc_pattern(&desc->ld_pattern);
+ lod_fix_desc_qos_maxage(&desc->ld_qos_maxage);
+}
+
+/**
+ * Initialize the structures used to store pools and default striping.
+ *
+ * \param[in] lod LOD device
+ * \param[in] lcfg configuration structure storing default striping.
+ *
+ * \retval 0 if initialization succeeds
+ * \retval negative error number on failure
+ */
+int lod_pools_init(struct lod_device *lod, struct lustre_cfg *lcfg)
+{
+ struct obd_device *obd;
+ struct lov_desc *desc;
+ int rc;
+ ENTRY;
+
+ obd = class_name2obd(lustre_cfg_string(lcfg, 0));
+ LASSERT(obd != NULL);
+ obd->obd_lu_dev = &lod->lod_dt_dev.dd_lu_dev;
+
+ if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
+ CERROR("LOD setup requires a descriptor\n");
+ RETURN(-EINVAL);
+ }
+
+ desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
+
+ if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
+ CERROR("descriptor size wrong: %d > %d\n",
+ (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
+ RETURN(-EINVAL);
+ }
+
+ if (desc->ld_magic != LOV_DESC_MAGIC) {
+ if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
+ CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
+ obd->obd_name, desc);
+ lustre_swab_lov_desc(desc);
+ } else {
+ CERROR("%s: Bad lov desc magic: %#x\n",
+ obd->obd_name, desc->ld_magic);
+ RETURN(-EINVAL);
+ }
+ }
+
+ lod_fix_desc(desc);
+
+ desc->ld_active_tgt_count = 0;
+ lod->lod_desc = *desc;
+
+ lod->lod_sp_me = LUSTRE_SP_CLI;
+
+ /* Set up allocation policy (QoS and RR) */
+ INIT_LIST_HEAD(&lod->lod_qos.lq_oss_list);
+ init_rwsem(&lod->lod_qos.lq_rw_sem);
+ lod->lod_qos.lq_dirty = 1;
+ lod->lod_qos.lq_rr.lqr_dirty = 1;
+ lod->lod_qos.lq_reset = 1;
+ /* Default priority is toward free space balance */
+ lod->lod_qos.lq_prio_free = 232;
+ /* Default threshold for rr (roughly 17%) */
+ lod->lod_qos.lq_threshold_rr = 43;
+
+ /* Set up OST pool environment */
+ lod->lod_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
+ HASH_POOLS_MAX_BITS,
+ HASH_POOLS_BKT_BITS, 0,
+ CFS_HASH_MIN_THETA,
+ CFS_HASH_MAX_THETA,
+ &pool_hash_operations,
+ CFS_HASH_DEFAULT);
+ if (lod->lod_pools_hash_body == NULL)
+ RETURN(-ENOMEM);
+
+ INIT_LIST_HEAD(&lod->lod_pool_list);
+ lod->lod_pool_count = 0;
+ rc = lod_ost_pool_init(&lod->lod_pool_info, 0);
+ if (rc)
+ GOTO(out_hash, rc);
+ rc = lod_ost_pool_init(&lod->lod_qos.lq_rr.lqr_pool, 0);
+ if (rc)
+ GOTO(out_pool_info, rc);
+
+ RETURN(0);
+
+out_pool_info:
+ lod_ost_pool_free(&lod->lod_pool_info);
+out_hash:
+ cfs_hash_putref(lod->lod_pools_hash_body);
+
+ return rc;
+}
+
+/**
+ * Release the structures describing the pools.
+ *
+ * \param[in] lod LOD device from which we release the structures
+ *
+ * \retval 0 always
+ */
+int lod_pools_fini(struct lod_device *lod)
+{
+ struct obd_device *obd = lod2obd(lod);
+ struct pool_desc *pool, *tmp;
+ ENTRY;
+
+ list_for_each_entry_safe(pool, tmp, &lod->lod_pool_list, pool_list) {
+ /* free pool structs */
+ CDEBUG(D_INFO, "delete pool %p\n", pool);
+ /* In the function below, .hs_keycmp resolves to
+ * pool_hashkey_keycmp() */
+ /* coverity[overrun-buffer-val] */
+ lod_pool_del(obd, pool->pool_name);
+ }
+
+ cfs_hash_putref(lod->lod_pools_hash_body);
+ lod_ost_pool_free(&(lod->lod_qos.lq_rr.lqr_pool));
+ lod_ost_pool_free(&lod->lod_pool_info);
+
+ RETURN(0);
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff