/*
 * GPL HEADER START
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * 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 LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU General Public License
 * version 2 along with this program; If not, see
 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 *
 * GPL HEADER END
 */
/*
 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
 * Use is subject to license terms.
 *
 * Copyright (c) 2011, 2012, Intel Corporation.
 */
/*
 * This file is part of Lustre, http://www.lustre.org/
 * Lustre is a trademark of Sun Microsystems, Inc.
 */

#define DEBUG_SUBSYSTEM S_LOV

#include "../../include/linux/libcfs/libcfs.h"

#include "../include/obd_class.h"
#include "../include/lustre/lustre_idl.h"
#include "lov_internal.h"

static void lov_init_set(struct lov_request_set *set)
{
        set->set_count = 0;
        atomic_set(&set->set_completes, 0);
        atomic_set(&set->set_success, 0);
        atomic_set(&set->set_finish_checked, 0);
        set->set_cookies = NULL;
        INIT_LIST_HEAD(&set->set_list);
        atomic_set(&set->set_refcount, 1);
        init_waitqueue_head(&set->set_waitq);
        spin_lock_init(&set->set_lock);
}

void lov_finish_set(struct lov_request_set *set)
{
        struct list_head *pos, *n;

        LASSERT(set);
        list_for_each_safe(pos, n, &set->set_list) {
                struct lov_request *req = list_entry(pos,
                                                         struct lov_request,
                                                         rq_link);
                list_del_init(&req->rq_link);

                if (req->rq_oi.oi_oa)
                        OBDO_FREE(req->rq_oi.oi_oa);
                if (req->rq_oi.oi_md)
                        OBD_FREE_LARGE(req->rq_oi.oi_md, req->rq_buflen);
                if (req->rq_oi.oi_osfs)
                        OBD_FREE(req->rq_oi.oi_osfs,
                                 sizeof(*req->rq_oi.oi_osfs));
                OBD_FREE(req, sizeof(*req));
        }

        if (set->set_pga) {
                int len = set->set_oabufs * sizeof(*set->set_pga);
                OBD_FREE_LARGE(set->set_pga, len);
        }
        if (set->set_lockh)
                lov_llh_put(set->set_lockh);

        OBD_FREE(set, sizeof(*set));
}

int lov_set_finished(struct lov_request_set *set, int idempotent)
{
        int completes = atomic_read(&set->set_completes);

        CDEBUG(D_INFO, "check set %d/%d\n", completes, set->set_count);

        if (completes == set->set_count) {
                if (idempotent)
                        return 1;
                if (atomic_inc_return(&set->set_finish_checked) == 1)
                        return 1;
        }
        return 0;
}

void lov_update_set(struct lov_request_set *set,
                    struct lov_request *req, int rc)
{
        req->rq_complete = 1;
        req->rq_rc = rc;

        atomic_inc(&set->set_completes);
        if (rc == 0)
                atomic_inc(&set->set_success);

        wake_up(&set->set_waitq);
}

int lov_update_common_set(struct lov_request_set *set,
                          struct lov_request *req, int rc)
{
        struct lov_obd *lov = &set->set_exp->exp_obd->u.lov;

        lov_update_set(set, req, rc);

        /* grace error on inactive ost */
        if (rc && !(lov->lov_tgts[req->rq_idx] &&
                    lov->lov_tgts[req->rq_idx]->ltd_active))
                rc = 0;

        /* FIXME in raid1 regime, should return 0 */
        return rc;
}

void lov_set_add_req(struct lov_request *req, struct lov_request_set *set)
{
        list_add_tail(&req->rq_link, &set->set_list);
        set->set_count++;
        req->rq_rqset = set;
}

static int lov_check_set(struct lov_obd *lov, int idx)
{
        int rc;
        struct lov_tgt_desc *tgt;

        mutex_lock(&lov->lov_lock);
        tgt = lov->lov_tgts[idx];
        rc = !tgt || tgt->ltd_active ||
                (tgt->ltd_exp &&
                 class_exp2cliimp(tgt->ltd_exp)->imp_connect_tried);
        mutex_unlock(&lov->lov_lock);

        return rc;
}

/* Check if the OSC connection exists and is active.
 * If the OSC has not yet had a chance to connect to the OST the first time,
 * wait once for it to connect instead of returning an error.
 */
int lov_check_and_wait_active(struct lov_obd *lov, int ost_idx)
{
        wait_queue_head_t waitq;
        struct l_wait_info lwi;
        struct lov_tgt_desc *tgt;
        int rc = 0;

        mutex_lock(&lov->lov_lock);

        tgt = lov->lov_tgts[ost_idx];

        if (unlikely(tgt == NULL)) {
                rc = 0;
                goto out;
        }

        if (likely(tgt->ltd_active)) {
                rc = 1;
                goto out;
        }

        if (tgt->ltd_exp && class_exp2cliimp(tgt->ltd_exp)->imp_connect_tried) {
                rc = 0;
                goto out;
        }

        mutex_unlock(&lov->lov_lock);

        init_waitqueue_head(&waitq);
        lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(obd_timeout),
                                   cfs_time_seconds(1), NULL, NULL);

        rc = l_wait_event(waitq, lov_check_set(lov, ost_idx), &lwi);
        if (tgt != NULL && tgt->ltd_active)
                return 1;

        return 0;

out:
        mutex_unlock(&lov->lov_lock);
        return rc;
}

static int common_attr_done(struct lov_request_set *set)
{
        struct list_head *pos;
        struct lov_request *req;
        struct obdo *tmp_oa;
        int rc = 0, attrset = 0;

        LASSERT(set->set_oi != NULL);

        if (set->set_oi->oi_oa == NULL)
                return 0;

        if (!atomic_read(&set->set_success))
                return -EIO;

        OBDO_ALLOC(tmp_oa);
        if (tmp_oa == NULL) {
                rc = -ENOMEM;
                goto out;
        }

        list_for_each(pos, &set->set_list) {
                req = list_entry(pos, struct lov_request, rq_link);

                if (!req->rq_complete || req->rq_rc)
                        continue;
                if (req->rq_oi.oi_oa->o_valid == 0)   /* inactive stripe */
                        continue;
                lov_merge_attrs(tmp_oa, req->rq_oi.oi_oa,
                                req->rq_oi.oi_oa->o_valid,
                                set->set_oi->oi_md, req->rq_stripe, &attrset);
        }
        if (!attrset) {
                CERROR("No stripes had valid attrs\n");
                rc = -EIO;
        }
        if ((set->set_oi->oi_oa->o_valid & OBD_MD_FLEPOCH) &&
            (set->set_oi->oi_md->lsm_stripe_count != attrset)) {
                /* When we take attributes of some epoch, we require all the
                 * ost to be active. */
                CERROR("Not all the stripes had valid attrs\n");
                rc = -EIO;
                goto out;
        }

        tmp_oa->o_oi = set->set_oi->oi_oa->o_oi;
        memcpy(set->set_oi->oi_oa, tmp_oa, sizeof(*set->set_oi->oi_oa));
out:
        if (tmp_oa)
                OBDO_FREE(tmp_oa);
        return rc;

}

int lov_fini_getattr_set(struct lov_request_set *set)
{
        int rc = 0;

        if (set == NULL)
                return 0;
        LASSERT(set->set_exp);
        if (atomic_read(&set->set_completes))
                rc = common_attr_done(set);

        lov_put_reqset(set);

        return rc;
}

/* The callback for osc_getattr_async that finalizes a request info when a
 * response is received. */
static int cb_getattr_update(void *cookie, int rc)
{
        struct obd_info *oinfo = cookie;
        struct lov_request *lovreq;

        lovreq = container_of(oinfo, struct lov_request, rq_oi);
        return lov_update_common_set(lovreq->rq_rqset, lovreq, rc);
}

int lov_prep_getattr_set(struct obd_export *exp, struct obd_info *oinfo,
                         struct lov_request_set **reqset)
{
        struct lov_request_set *set;
        struct lov_obd *lov = &exp->exp_obd->u.lov;
        int rc = 0, i;

        OBD_ALLOC(set, sizeof(*set));
        if (set == NULL)
                return -ENOMEM;
        lov_init_set(set);

        set->set_exp = exp;
        set->set_oi = oinfo;

        for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
                struct lov_oinfo *loi;
                struct lov_request *req;

                loi = oinfo->oi_md->lsm_oinfo[i];
                if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
                        CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
                        if (oinfo->oi_oa->o_valid & OBD_MD_FLEPOCH) {
                                /* SOM requires all the OSTs to be active. */
                                rc = -EIO;
                                goto out_set;
                        }
                        continue;
                }

                OBD_ALLOC(req, sizeof(*req));
                if (req == NULL) {
                        rc = -ENOMEM;
                        goto out_set;
                }

                req->rq_stripe = i;
                req->rq_idx = loi->loi_ost_idx;

                OBDO_ALLOC(req->rq_oi.oi_oa);
                if (req->rq_oi.oi_oa == NULL) {
                        OBD_FREE(req, sizeof(*req));
                        rc = -ENOMEM;
                        goto out_set;
                }
                memcpy(req->rq_oi.oi_oa, oinfo->oi_oa,
                       sizeof(*req->rq_oi.oi_oa));
                req->rq_oi.oi_oa->o_oi = loi->loi_oi;
                req->rq_oi.oi_cb_up = cb_getattr_update;
                req->rq_oi.oi_capa = oinfo->oi_capa;

                lov_set_add_req(req, set);
        }
        if (!set->set_count) {
                rc = -EIO;
                goto out_set;
        }
        *reqset = set;
        return rc;
out_set:
        lov_fini_getattr_set(set);
        return rc;
}

int lov_fini_destroy_set(struct lov_request_set *set)
{
        if (set == NULL)
                return 0;
        LASSERT(set->set_exp);
        if (atomic_read(&set->set_completes)) {
                /* FIXME update qos data here */
        }

        lov_put_reqset(set);

        return 0;
}

int lov_prep_destroy_set(struct obd_export *exp, struct obd_info *oinfo,
                         struct obdo *src_oa, struct lov_stripe_md *lsm,
                         struct obd_trans_info *oti,
                         struct lov_request_set **reqset)
{
        struct lov_request_set *set;
        struct lov_obd *lov = &exp->exp_obd->u.lov;
        int rc = 0, i;

        OBD_ALLOC(set, sizeof(*set));
        if (set == NULL)
                return -ENOMEM;
        lov_init_set(set);

        set->set_exp = exp;
        set->set_oi = oinfo;
        set->set_oi->oi_md = lsm;
        set->set_oi->oi_oa = src_oa;
        set->set_oti = oti;
        if (oti != NULL && src_oa->o_valid & OBD_MD_FLCOOKIE)
                set->set_cookies = oti->oti_logcookies;

        for (i = 0; i < lsm->lsm_stripe_count; i++) {
                struct lov_oinfo *loi;
                struct lov_request *req;

                loi = lsm->lsm_oinfo[i];
                if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
                        CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
                        continue;
                }

                OBD_ALLOC(req, sizeof(*req));
                if (req == NULL) {
                        rc = -ENOMEM;
                        goto out_set;
                }

                req->rq_stripe = i;
                req->rq_idx = loi->loi_ost_idx;

                OBDO_ALLOC(req->rq_oi.oi_oa);
                if (req->rq_oi.oi_oa == NULL) {
                        OBD_FREE(req, sizeof(*req));
                        rc = -ENOMEM;
                        goto out_set;
                }
                memcpy(req->rq_oi.oi_oa, src_oa, sizeof(*req->rq_oi.oi_oa));
                req->rq_oi.oi_oa->o_oi = loi->loi_oi;
                lov_set_add_req(req, set);
        }
        if (!set->set_count) {
                rc = -EIO;
                goto out_set;
        }
        *reqset = set;
        return rc;
out_set:
        lov_fini_destroy_set(set);
        return rc;
}

int lov_fini_setattr_set(struct lov_request_set *set)
{
        int rc = 0;

        if (set == NULL)
                return 0;
        LASSERT(set->set_exp);
        if (atomic_read(&set->set_completes)) {
                rc = common_attr_done(set);
                /* FIXME update qos data here */
        }

        lov_put_reqset(set);
        return rc;
}

int lov_update_setattr_set(struct lov_request_set *set,
                           struct lov_request *req, int rc)
{
        struct lov_obd *lov = &req->rq_rqset->set_exp->exp_obd->u.lov;
        struct lov_stripe_md *lsm = req->rq_rqset->set_oi->oi_md;

        lov_update_set(set, req, rc);

        /* grace error on inactive ost */
        if (rc && !(lov->lov_tgts[req->rq_idx] &&
                    lov->lov_tgts[req->rq_idx]->ltd_active))
                rc = 0;

        if (rc == 0) {
                if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLCTIME)
                        lsm->lsm_oinfo[req->rq_stripe]->loi_lvb.lvb_ctime =
                                req->rq_oi.oi_oa->o_ctime;
                if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLMTIME)
                        lsm->lsm_oinfo[req->rq_stripe]->loi_lvb.lvb_mtime =
                                req->rq_oi.oi_oa->o_mtime;
                if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLATIME)
                        lsm->lsm_oinfo[req->rq_stripe]->loi_lvb.lvb_atime =
                                req->rq_oi.oi_oa->o_atime;
        }

        return rc;
}

/* The callback for osc_setattr_async that finalizes a request info when a
 * response is received. */
static int cb_setattr_update(void *cookie, int rc)
{
        struct obd_info *oinfo = cookie;
        struct lov_request *lovreq;

        lovreq = container_of(oinfo, struct lov_request, rq_oi);
        return lov_update_setattr_set(lovreq->rq_rqset, lovreq, rc);
}

int lov_prep_setattr_set(struct obd_export *exp, struct obd_info *oinfo,
                         struct obd_trans_info *oti,
                         struct lov_request_set **reqset)
{
        struct lov_request_set *set;
        struct lov_obd *lov = &exp->exp_obd->u.lov;
        int rc = 0, i;

        OBD_ALLOC(set, sizeof(*set));
        if (set == NULL)
                return -ENOMEM;
        lov_init_set(set);

        set->set_exp = exp;
        set->set_oti = oti;
        set->set_oi = oinfo;
        if (oti != NULL && oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
                set->set_cookies = oti->oti_logcookies;

        for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
                struct lov_oinfo *loi = oinfo->oi_md->lsm_oinfo[i];
                struct lov_request *req;

                if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
                        CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
                        continue;
                }

                OBD_ALLOC(req, sizeof(*req));
                if (req == NULL) {
                        rc = -ENOMEM;
                        goto out_set;
                }
                req->rq_stripe = i;
                req->rq_idx = loi->loi_ost_idx;

                OBDO_ALLOC(req->rq_oi.oi_oa);
                if (req->rq_oi.oi_oa == NULL) {
                        OBD_FREE(req, sizeof(*req));
                        rc = -ENOMEM;
                        goto out_set;
                }
                memcpy(req->rq_oi.oi_oa, oinfo->oi_oa,
                       sizeof(*req->rq_oi.oi_oa));
                req->rq_oi.oi_oa->o_oi = loi->loi_oi;
                req->rq_oi.oi_oa->o_stripe_idx = i;
                req->rq_oi.oi_cb_up = cb_setattr_update;
                req->rq_oi.oi_capa = oinfo->oi_capa;

                if (oinfo->oi_oa->o_valid & OBD_MD_FLSIZE) {
                        int off = lov_stripe_offset(oinfo->oi_md,
                                                    oinfo->oi_oa->o_size, i,
                                                    &req->rq_oi.oi_oa->o_size);

                        if (off < 0 && req->rq_oi.oi_oa->o_size)
                                req->rq_oi.oi_oa->o_size--;

                        CDEBUG(D_INODE, "stripe %d has size %llu/%llu\n",
                               i, req->rq_oi.oi_oa->o_size,
                               oinfo->oi_oa->o_size);
                }
                lov_set_add_req(req, set);
        }
        if (!set->set_count) {
                rc = -EIO;
                goto out_set;
        }
        *reqset = set;
        return rc;
out_set:
        lov_fini_setattr_set(set);
        return rc;
}

#define LOV_U64_MAX ((__u64)~0ULL)
#define LOV_SUM_MAX(tot, add)                                      \
        do {                                                        \
                if ((tot) + (add) < (tot))                            \
                        (tot) = LOV_U64_MAX;                        \
                else                                                \
                        (tot) += (add);                          \
        } while (0)

int lov_fini_statfs(struct obd_device *obd, struct obd_statfs *osfs,
                    int success)
{
        if (success) {
                __u32 expected_stripes = lov_get_stripecnt(&obd->u.lov,
                                                           LOV_MAGIC, 0);
                if (osfs->os_files != LOV_U64_MAX)
                        lov_do_div64(osfs->os_files, expected_stripes);
                if (osfs->os_ffree != LOV_U64_MAX)
                        lov_do_div64(osfs->os_ffree, expected_stripes);

                spin_lock(&obd->obd_osfs_lock);
                memcpy(&obd->obd_osfs, osfs, sizeof(*osfs));
                obd->obd_osfs_age = cfs_time_current_64();
                spin_unlock(&obd->obd_osfs_lock);
                return 0;
        }

        return -EIO;
}

int lov_fini_statfs_set(struct lov_request_set *set)
{
        int rc = 0;

        if (set == NULL)
                return 0;

        if (atomic_read(&set->set_completes)) {
                rc = lov_fini_statfs(set->set_obd, set->set_oi->oi_osfs,
                                     atomic_read(&set->set_success));
        }
        lov_put_reqset(set);
        return rc;
}

void lov_update_statfs(struct obd_statfs *osfs, struct obd_statfs *lov_sfs,
                       int success)
{
        int shift = 0, quit = 0;
        __u64 tmp;

        if (success == 0) {
                memcpy(osfs, lov_sfs, sizeof(*lov_sfs));
        } else {
                if (osfs->os_bsize != lov_sfs->os_bsize) {
                        /* assume all block sizes are always powers of 2 */
                        /* get the bits difference */
                        tmp = osfs->os_bsize | lov_sfs->os_bsize;
                        for (shift = 0; shift <= 64; ++shift) {
                                if (tmp & 1) {
                                        if (quit)
                                                break;
                                        else
                                                quit = 1;
                                        shift = 0;
                                }
                                tmp >>= 1;
                        }
                }

                if (osfs->os_bsize < lov_sfs->os_bsize) {
                        osfs->os_bsize = lov_sfs->os_bsize;

                        osfs->os_bfree  >>= shift;
                        osfs->os_bavail >>= shift;
                        osfs->os_blocks >>= shift;
                } else if (shift != 0) {
                        lov_sfs->os_bfree  >>= shift;
                        lov_sfs->os_bavail >>= shift;
                        lov_sfs->os_blocks >>= shift;
                }
                osfs->os_bfree += lov_sfs->os_bfree;
                osfs->os_bavail += lov_sfs->os_bavail;
                osfs->os_blocks += lov_sfs->os_blocks;
                /* XXX not sure about this one - depends on policy.
                 *   - could be minimum if we always stripe on all OBDs
                 *     (but that would be wrong for any other policy,
                 *     if one of the OBDs has no more objects left)
                 *   - could be sum if we stripe whole objects
                 *   - could be average, just to give a nice number
                 *
                 * To give a "reasonable" (if not wholly accurate)
                 * number, we divide the total number of free objects
                 * by expected stripe count (watch out for overflow).
                 */
                LOV_SUM_MAX(osfs->os_files, lov_sfs->os_files);
                LOV_SUM_MAX(osfs->os_ffree, lov_sfs->os_ffree);
        }
}

/* The callback for osc_statfs_async that finalizes a request info when a
 * response is received. */
static int cb_statfs_update(void *cookie, int rc)
{
        struct obd_info *oinfo = cookie;
        struct lov_request *lovreq;
        struct lov_request_set *set;
        struct obd_statfs *osfs, *lov_sfs;
        struct lov_obd *lov;
        struct lov_tgt_desc *tgt;
        struct obd_device *lovobd, *tgtobd;
        int success;

        lovreq = container_of(oinfo, struct lov_request, rq_oi);
        set = lovreq->rq_rqset;
        lovobd = set->set_obd;
        lov = &lovobd->u.lov;
        osfs = set->set_oi->oi_osfs;
        lov_sfs = oinfo->oi_osfs;
        success = atomic_read(&set->set_success);
        /* XXX: the same is done in lov_update_common_set, however
           lovset->set_exp is not initialized. */
        lov_update_set(set, lovreq, rc);
        if (rc)
                goto out;

        obd_getref(lovobd);
        tgt = lov->lov_tgts[lovreq->rq_idx];
        if (!tgt || !tgt->ltd_active)
                goto out_update;

        tgtobd = class_exp2obd(tgt->ltd_exp);
        spin_lock(&tgtobd->obd_osfs_lock);
        memcpy(&tgtobd->obd_osfs, lov_sfs, sizeof(*lov_sfs));
        if ((oinfo->oi_flags & OBD_STATFS_FROM_CACHE) == 0)
                tgtobd->obd_osfs_age = cfs_time_current_64();
        spin_unlock(&tgtobd->obd_osfs_lock);

out_update:
        lov_update_statfs(osfs, lov_sfs, success);
        obd_putref(lovobd);

out:
        if (set->set_oi->oi_flags & OBD_STATFS_PTLRPCD &&
            lov_set_finished(set, 0)) {
                lov_statfs_interpret(NULL, set, set->set_count !=
                                     atomic_read(&set->set_success));
        }

        return 0;
}

int lov_prep_statfs_set(struct obd_device *obd, struct obd_info *oinfo,
                        struct lov_request_set **reqset)
{
        struct lov_request_set *set;
        struct lov_obd *lov = &obd->u.lov;
        int rc = 0, i;

        OBD_ALLOC(set, sizeof(*set));
        if (set == NULL)
                return -ENOMEM;
        lov_init_set(set);

        set->set_obd = obd;
        set->set_oi = oinfo;

        /* We only get block data from the OBD */
        for (i = 0; i < lov->desc.ld_tgt_count; i++) {
                struct lov_request *req;

                if (lov->lov_tgts[i] == NULL ||
                    (!lov_check_and_wait_active(lov, i) &&
                     (oinfo->oi_flags & OBD_STATFS_NODELAY))) {
                        CDEBUG(D_HA, "lov idx %d inactive\n", i);
                        continue;
                }

                /* skip targets that have been explicitly disabled by the
                 * administrator */
                if (!lov->lov_tgts[i]->ltd_exp) {
                        CDEBUG(D_HA, "lov idx %d administratively disabled\n", i);
                        continue;
                }

                OBD_ALLOC(req, sizeof(*req));
                if (req == NULL) {
                        rc = -ENOMEM;
                        goto out_set;
                }

                OBD_ALLOC(req->rq_oi.oi_osfs, sizeof(*req->rq_oi.oi_osfs));
                if (req->rq_oi.oi_osfs == NULL) {
                        OBD_FREE(req, sizeof(*req));
                        rc = -ENOMEM;
                        goto out_set;
                }

                req->rq_idx = i;
                req->rq_oi.oi_cb_up = cb_statfs_update;
                req->rq_oi.oi_flags = oinfo->oi_flags;

                lov_set_add_req(req, set);
        }
        if (!set->set_count) {
                rc = -EIO;
                goto out_set;
        }
        *reqset = set;
        return rc;
out_set:
        lov_fini_statfs_set(set);
        return rc;
}