diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/lov/lov_obd.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/lov/lov_obd.c | 1448 |
1 files changed, 0 insertions, 1448 deletions
diff --git a/drivers/staging/lustre/lustre/lov/lov_obd.c b/drivers/staging/lustre/lustre/lov/lov_obd.c deleted file mode 100644 index ec70c12e5b40..000000000000 --- a/drivers/staging/lustre/lustre/lov/lov_obd.c +++ /dev/null @@ -1,1448 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * 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.gnu.org/licenses/gpl-2.0.html - * - * GPL HEADER END - */ -/* - * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - * - * Copyright (c) 2011, 2015, Intel Corporation. - */ -/* - * This file is part of Lustre, http://www.lustre.org/ - * Lustre is a trademark of Sun Microsystems, Inc. - * - * lustre/lov/lov_obd.c - * - * Author: Phil Schwan <phil@clusterfs.com> - * Author: Peter Braam <braam@clusterfs.com> - * Author: Mike Shaver <shaver@clusterfs.com> - * Author: Nathan Rutman <nathan@clusterfs.com> - */ - -#define DEBUG_SUBSYSTEM S_LOV -#include <linux/libcfs/libcfs.h> - -#include <uapi/linux/lustre/lustre_idl.h> -#include <uapi/linux/lustre/lustre_ioctl.h> - -#include <cl_object.h> -#include <lustre_dlm.h> -#include <lustre_fid.h> -#include <lustre_lib.h> -#include <lustre_mds.h> -#include <lustre_net.h> -#include <uapi/linux/lustre/lustre_param.h> -#include <lustre_swab.h> -#include <lprocfs_status.h> -#include <obd_class.h> -#include <obd_support.h> - -#include "lov_internal.h" - -/* Keep a refcount of lov->tgt usage to prevent racing with addition/deletion. - * Any function that expects lov_tgts to remain stationary must take a ref. - */ -static void lov_getref(struct obd_device *obd) -{ - struct lov_obd *lov = &obd->u.lov; - - /* nobody gets through here until lov_putref is done */ - mutex_lock(&lov->lov_lock); - atomic_inc(&lov->lov_refcount); - mutex_unlock(&lov->lov_lock); -} - -static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt); - -static void lov_putref(struct obd_device *obd) -{ - struct lov_obd *lov = &obd->u.lov; - - mutex_lock(&lov->lov_lock); - /* ok to dec to 0 more than once -- ltd_exp's will be null */ - if (atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) { - LIST_HEAD(kill); - int i; - struct lov_tgt_desc *tgt, *n; - - CDEBUG(D_CONFIG, "destroying %d lov targets\n", - lov->lov_death_row); - for (i = 0; i < lov->desc.ld_tgt_count; i++) { - tgt = lov->lov_tgts[i]; - - if (!tgt || !tgt->ltd_reap) - continue; - list_add(&tgt->ltd_kill, &kill); - /* XXX - right now there is a dependency on ld_tgt_count - * being the maximum tgt index for computing the - * mds_max_easize. So we can't shrink it. - */ - lov_ost_pool_remove(&lov->lov_packed, i); - lov->lov_tgts[i] = NULL; - lov->lov_death_row--; - } - mutex_unlock(&lov->lov_lock); - - list_for_each_entry_safe(tgt, n, &kill, ltd_kill) { - list_del(&tgt->ltd_kill); - /* Disconnect */ - __lov_del_obd(obd, tgt); - } - - if (lov->lov_tgts_kobj) - kobject_put(lov->lov_tgts_kobj); - - } else { - mutex_unlock(&lov->lov_lock); - } -} - -static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid, - enum obd_notify_event ev); -static int lov_notify(struct obd_device *obd, struct obd_device *watched, - enum obd_notify_event ev, void *data); - -int lov_connect_obd(struct obd_device *obd, __u32 index, int activate, - struct obd_connect_data *data) -{ - struct lov_obd *lov = &obd->u.lov; - struct obd_uuid *tgt_uuid; - struct obd_device *tgt_obd; - static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" }; - struct obd_import *imp; - int rc; - - if (!lov->lov_tgts[index]) - return -EINVAL; - - tgt_uuid = &lov->lov_tgts[index]->ltd_uuid; - tgt_obd = lov->lov_tgts[index]->ltd_obd; - - if (!tgt_obd->obd_set_up) { - CERROR("Target %s not set up\n", obd_uuid2str(tgt_uuid)); - return -EINVAL; - } - - /* override the sp_me from lov */ - tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me; - - if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX)) - data->ocd_index = index; - - /* - * Divine LOV knows that OBDs under it are OSCs. - */ - imp = tgt_obd->u.cli.cl_import; - - if (activate) { - tgt_obd->obd_no_recov = 0; - /* FIXME this is probably supposed to be - * ptlrpc_set_import_active. Horrible naming. - */ - ptlrpc_activate_import(imp); - } - - rc = obd_register_observer(tgt_obd, obd); - if (rc) { - CERROR("Target %s register_observer error %d\n", - obd_uuid2str(tgt_uuid), rc); - return rc; - } - - if (imp->imp_invalid) { - CDEBUG(D_CONFIG, "not connecting OSC %s; administratively disabled\n", - obd_uuid2str(tgt_uuid)); - return 0; - } - - rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd, - &lov_osc_uuid, data, NULL); - if (rc || !lov->lov_tgts[index]->ltd_exp) { - CERROR("Target %s connect error %d\n", - obd_uuid2str(tgt_uuid), rc); - return -ENODEV; - } - - lov->lov_tgts[index]->ltd_reap = 0; - - CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index, - obd_uuid2str(tgt_uuid), tgt_obd->obd_name, activate ? "":"in"); - - if (lov->lov_tgts_kobj) - /* Even if we failed, that's ok */ - rc = sysfs_create_link(lov->lov_tgts_kobj, &tgt_obd->obd_kobj, - tgt_obd->obd_name); - - return 0; -} - -static int lov_connect(const struct lu_env *env, - struct obd_export **exp, struct obd_device *obd, - struct obd_uuid *cluuid, struct obd_connect_data *data, - void *localdata) -{ - struct lov_obd *lov = &obd->u.lov; - struct lov_tgt_desc *tgt; - struct lustre_handle conn; - int i, rc; - - CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects); - - rc = class_connect(&conn, obd, cluuid); - if (rc) - return rc; - - *exp = class_conn2export(&conn); - - /* Why should there ever be more than 1 connect? */ - lov->lov_connects++; - LASSERT(lov->lov_connects == 1); - - memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd)); - if (data) - lov->lov_ocd = *data; - - obd_getref(obd); - - lov->lov_tgts_kobj = kobject_create_and_add("target_obds", - &obd->obd_kobj); - - for (i = 0; i < lov->desc.ld_tgt_count; i++) { - tgt = lov->lov_tgts[i]; - if (!tgt || obd_uuid_empty(&tgt->ltd_uuid)) - continue; - /* Flags will be lowest common denominator */ - rc = lov_connect_obd(obd, i, tgt->ltd_activate, &lov->lov_ocd); - if (rc) { - CERROR("%s: lov connect tgt %d failed: %d\n", - obd->obd_name, i, rc); - continue; - } - /* connect to administrative disabled ost */ - if (!lov->lov_tgts[i]->ltd_exp) - continue; - - rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd, - OBD_NOTIFY_CONNECT, (void *)&i); - if (rc) { - CERROR("%s error sending notify %d\n", - obd->obd_name, rc); - } - } - obd_putref(obd); - - return 0; -} - -static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt) -{ - struct lov_obd *lov = &obd->u.lov; - struct obd_device *osc_obd; - int rc; - - osc_obd = class_exp2obd(tgt->ltd_exp); - CDEBUG(D_CONFIG, "%s: disconnecting target %s\n", - obd->obd_name, osc_obd ? osc_obd->obd_name : "NULL"); - - if (tgt->ltd_active) { - tgt->ltd_active = 0; - lov->desc.ld_active_tgt_count--; - tgt->ltd_exp->exp_obd->obd_inactive = 1; - } - - if (osc_obd) { - if (lov->lov_tgts_kobj) - sysfs_remove_link(lov->lov_tgts_kobj, - osc_obd->obd_name); - - /* Pass it on to our clients. - * XXX This should be an argument to disconnect, - * XXX not a back-door flag on the OBD. Ah well. - */ - osc_obd->obd_force = obd->obd_force; - osc_obd->obd_fail = obd->obd_fail; - osc_obd->obd_no_recov = obd->obd_no_recov; - } - - obd_register_observer(osc_obd, NULL); - - rc = obd_disconnect(tgt->ltd_exp); - if (rc) { - CERROR("Target %s disconnect error %d\n", - tgt->ltd_uuid.uuid, rc); - rc = 0; - } - - tgt->ltd_exp = NULL; - return 0; -} - -static int lov_disconnect(struct obd_export *exp) -{ - struct obd_device *obd = class_exp2obd(exp); - struct lov_obd *lov = &obd->u.lov; - int i, rc; - - if (!lov->lov_tgts) - goto out; - - /* Only disconnect the underlying layers on the final disconnect. */ - lov->lov_connects--; - if (lov->lov_connects != 0) { - /* why should there be more than 1 connect? */ - CERROR("disconnect #%d\n", lov->lov_connects); - goto out; - } - - /* Let's hold another reference so lov_del_obd doesn't spin through - * putref every time - */ - obd_getref(obd); - - for (i = 0; i < lov->desc.ld_tgt_count; i++) { - if (lov->lov_tgts[i] && lov->lov_tgts[i]->ltd_exp) { - /* Disconnection is the last we know about an obd */ - lov_del_target(obd, i, NULL, lov->lov_tgts[i]->ltd_gen); - } - } - - obd_putref(obd); - -out: - rc = class_disconnect(exp); /* bz 9811 */ - return rc; -} - -/* Error codes: - * - * -EINVAL : UUID can't be found in the LOV's target list - * -ENOTCONN: The UUID is found, but the target connection is bad (!) - * -EBADF : The UUID is found, but the OBD is the wrong type (!) - * any >= 0 : is log target index - */ -static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid, - enum obd_notify_event ev) -{ - struct lov_obd *lov = &obd->u.lov; - struct lov_tgt_desc *tgt; - int index, activate, active; - - CDEBUG(D_INFO, "Searching in lov %p for uuid %s event(%d)\n", - lov, uuid->uuid, ev); - - obd_getref(obd); - for (index = 0; index < lov->desc.ld_tgt_count; index++) { - tgt = lov->lov_tgts[index]; - if (!tgt) - continue; - /* - * LU-642, initially inactive OSC could miss the obd_connect, - * we make up for it here. - */ - if (ev == OBD_NOTIFY_ACTIVATE && !tgt->ltd_exp && - obd_uuid_equals(uuid, &tgt->ltd_uuid)) { - struct obd_uuid lov_osc_uuid = {"LOV_OSC_UUID"}; - - obd_connect(NULL, &tgt->ltd_exp, tgt->ltd_obd, - &lov_osc_uuid, &lov->lov_ocd, NULL); - } - if (!tgt->ltd_exp) - continue; - - CDEBUG(D_INFO, "lov idx %d is %s conn %#llx\n", - index, obd_uuid2str(&tgt->ltd_uuid), - tgt->ltd_exp->exp_handle.h_cookie); - if (obd_uuid_equals(uuid, &tgt->ltd_uuid)) - break; - } - - if (index == lov->desc.ld_tgt_count) { - index = -EINVAL; - goto out; - } - - if (ev == OBD_NOTIFY_DEACTIVATE || ev == OBD_NOTIFY_ACTIVATE) { - activate = (ev == OBD_NOTIFY_ACTIVATE) ? 1 : 0; - - if (lov->lov_tgts[index]->ltd_activate == activate) { - CDEBUG(D_INFO, "OSC %s already %sactivate!\n", - uuid->uuid, activate ? "" : "de"); - } else { - lov->lov_tgts[index]->ltd_activate = activate; - CDEBUG(D_CONFIG, "%sactivate OSC %s\n", - activate ? "" : "de", obd_uuid2str(uuid)); - } - - } else if (ev == OBD_NOTIFY_INACTIVE || ev == OBD_NOTIFY_ACTIVE) { - active = (ev == OBD_NOTIFY_ACTIVE) ? 1 : 0; - - if (lov->lov_tgts[index]->ltd_active == active) { - CDEBUG(D_INFO, "OSC %s already %sactive!\n", - uuid->uuid, active ? "" : "in"); - goto out; - } - CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n", - obd_uuid2str(uuid), active ? "" : "in"); - - lov->lov_tgts[index]->ltd_active = active; - if (active) { - lov->desc.ld_active_tgt_count++; - lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0; - } else { - lov->desc.ld_active_tgt_count--; - lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1; - } - } else { - CERROR("Unknown event(%d) for uuid %s", ev, uuid->uuid); - } - - out: - obd_putref(obd); - return index; -} - -static int lov_notify(struct obd_device *obd, struct obd_device *watched, - enum obd_notify_event ev, void *data) -{ - int rc = 0; - struct lov_obd *lov = &obd->u.lov; - - down_read(&lov->lov_notify_lock); - if (!lov->lov_connects) { - up_read(&lov->lov_notify_lock); - return rc; - } - - if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE || - ev == OBD_NOTIFY_ACTIVATE || ev == OBD_NOTIFY_DEACTIVATE) { - struct obd_uuid *uuid; - - LASSERT(watched); - - if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) { - up_read(&lov->lov_notify_lock); - CERROR("unexpected notification of %s %s!\n", - watched->obd_type->typ_name, - watched->obd_name); - return -EINVAL; - } - uuid = &watched->u.cli.cl_target_uuid; - - /* Set OSC as active before notifying the observer, so the - * observer can use the OSC normally. - */ - rc = lov_set_osc_active(obd, uuid, ev); - if (rc < 0) { - up_read(&lov->lov_notify_lock); - CERROR("event(%d) of %s failed: %d\n", ev, - obd_uuid2str(uuid), rc); - return rc; - } - /* active event should be pass lov target index as data */ - data = &rc; - } - - /* Pass the notification up the chain. */ - if (watched) { - rc = obd_notify_observer(obd, watched, ev, data); - } else { - /* NULL watched means all osc's in the lov (only for syncs) */ - /* sync event should be send lov idx as data */ - struct lov_obd *lov = &obd->u.lov; - int i, is_sync; - - data = &i; - is_sync = (ev == OBD_NOTIFY_SYNC) || - (ev == OBD_NOTIFY_SYNC_NONBLOCK); - - obd_getref(obd); - for (i = 0; i < lov->desc.ld_tgt_count; i++) { - if (!lov->lov_tgts[i]) - continue; - - /* don't send sync event if target not - * connected/activated - */ - if (is_sync && !lov->lov_tgts[i]->ltd_active) - continue; - - rc = obd_notify_observer(obd, lov->lov_tgts[i]->ltd_obd, - ev, data); - if (rc) { - CERROR("%s: notify %s of %s failed %d\n", - obd->obd_name, - obd->obd_observer->obd_name, - lov->lov_tgts[i]->ltd_obd->obd_name, - rc); - } - } - obd_putref(obd); - } - - up_read(&lov->lov_notify_lock); - return rc; -} - -static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp, - __u32 index, int gen, int active) -{ - struct lov_obd *lov = &obd->u.lov; - struct lov_tgt_desc *tgt; - struct obd_device *tgt_obd; - int rc; - - CDEBUG(D_CONFIG, "uuid:%s idx:%d gen:%d active:%d\n", - uuidp->uuid, index, gen, active); - - if (gen <= 0) { - CERROR("request to add OBD %s with invalid generation: %d\n", - uuidp->uuid, gen); - return -EINVAL; - } - - tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME, - &obd->obd_uuid); - if (!tgt_obd) - return -EINVAL; - - mutex_lock(&lov->lov_lock); - - if ((index < lov->lov_tgt_size) && lov->lov_tgts[index]) { - tgt = lov->lov_tgts[index]; - CERROR("UUID %s already assigned at LOV target index %d\n", - obd_uuid2str(&tgt->ltd_uuid), index); - mutex_unlock(&lov->lov_lock); - return -EEXIST; - } - - if (index >= lov->lov_tgt_size) { - /* We need to reallocate the lov target array. */ - struct lov_tgt_desc **newtgts, **old = NULL; - __u32 newsize, oldsize = 0; - - newsize = max_t(__u32, lov->lov_tgt_size, 2); - while (newsize < index + 1) - newsize <<= 1; - newtgts = kcalloc(newsize, sizeof(*newtgts), GFP_NOFS); - if (!newtgts) { - mutex_unlock(&lov->lov_lock); - return -ENOMEM; - } - - if (lov->lov_tgt_size) { - memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) * - lov->lov_tgt_size); - old = lov->lov_tgts; - oldsize = lov->lov_tgt_size; - } - - lov->lov_tgts = newtgts; - lov->lov_tgt_size = newsize; - smp_rmb(); - kfree(old); - - CDEBUG(D_CONFIG, "tgts: %p size: %d\n", - lov->lov_tgts, lov->lov_tgt_size); - } - - tgt = kzalloc(sizeof(*tgt), GFP_NOFS); - if (!tgt) { - mutex_unlock(&lov->lov_lock); - return -ENOMEM; - } - - rc = lov_ost_pool_add(&lov->lov_packed, index, lov->lov_tgt_size); - if (rc) { - mutex_unlock(&lov->lov_lock); - kfree(tgt); - return rc; - } - - tgt->ltd_uuid = *uuidp; - tgt->ltd_obd = tgt_obd; - /* XXX - add a sanity check on the generation number. */ - tgt->ltd_gen = gen; - tgt->ltd_index = index; - tgt->ltd_activate = active; - lov->lov_tgts[index] = tgt; - if (index >= lov->desc.ld_tgt_count) - lov->desc.ld_tgt_count = index + 1; - - mutex_unlock(&lov->lov_lock); - - CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n", - index, tgt->ltd_gen, lov->desc.ld_tgt_count); - - if (lov->lov_connects == 0) { - /* lov_connect hasn't been called yet. We'll do the - * lov_connect_obd on this target when that fn first runs, - * because we don't know the connect flags yet. - */ - return 0; - } - - obd_getref(obd); - - rc = lov_connect_obd(obd, index, active, &lov->lov_ocd); - if (rc) - goto out; - - /* connect to administrative disabled ost */ - if (!tgt->ltd_exp) { - rc = 0; - goto out; - } - - if (lov->lov_cache) { - rc = obd_set_info_async(NULL, tgt->ltd_exp, - sizeof(KEY_CACHE_SET), KEY_CACHE_SET, - sizeof(struct cl_client_cache), - lov->lov_cache, NULL); - if (rc < 0) - goto out; - } - - rc = lov_notify(obd, tgt->ltd_exp->exp_obd, - active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE, - (void *)&index); - -out: - if (rc) { - CERROR("add failed (%d), deleting %s\n", rc, - obd_uuid2str(&tgt->ltd_uuid)); - lov_del_target(obd, index, NULL, 0); - } - obd_putref(obd); - return rc; -} - -/* Schedule a target for deletion */ -int lov_del_target(struct obd_device *obd, __u32 index, - struct obd_uuid *uuidp, int gen) -{ - struct lov_obd *lov = &obd->u.lov; - int count = lov->desc.ld_tgt_count; - int rc = 0; - - if (index >= count) { - CERROR("LOV target index %d >= number of LOV OBDs %d.\n", - index, count); - return -EINVAL; - } - - /* to make sure there's no ongoing lov_notify() now */ - down_write(&lov->lov_notify_lock); - obd_getref(obd); - - if (!lov->lov_tgts[index]) { - CERROR("LOV target at index %d is not setup.\n", index); - rc = -EINVAL; - goto out; - } - - if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) { - CERROR("LOV target UUID %s at index %d doesn't match %s.\n", - lov_uuid2str(lov, index), index, - obd_uuid2str(uuidp)); - rc = -EINVAL; - goto out; - } - - CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n", - lov_uuid2str(lov, index), index, - lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp, - lov->lov_tgts[index]->ltd_active); - - lov->lov_tgts[index]->ltd_reap = 1; - lov->lov_death_row++; - /* we really delete it from obd_putref */ -out: - obd_putref(obd); - up_write(&lov->lov_notify_lock); - - return rc; -} - -static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt) -{ - struct obd_device *osc_obd; - - LASSERT(tgt); - LASSERT(tgt->ltd_reap); - - osc_obd = class_exp2obd(tgt->ltd_exp); - - CDEBUG(D_CONFIG, "Removing tgt %s : %s\n", - tgt->ltd_uuid.uuid, - osc_obd ? osc_obd->obd_name : "<no obd>"); - - if (tgt->ltd_exp) - lov_disconnect_obd(obd, tgt); - - kfree(tgt); - - /* Manual cleanup - no cleanup logs to clean up the osc's. We must - * do it ourselves. And we can't do it from lov_cleanup, - * because we just lost our only reference to it. - */ - if (osc_obd) - class_manual_cleanup(osc_obd); -} - -void lov_fix_desc_stripe_size(__u64 *val) -{ - if (*val < LOV_MIN_STRIPE_SIZE) { - if (*val != 0) - LCONSOLE_INFO("Increasing default stripe size to minimum %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 %llu (a multiple of %u)\n", - *val, LOV_MIN_STRIPE_SIZE); - } -} - -void lov_fix_desc_stripe_count(__u32 *val) -{ - if (*val == 0) - *val = 1; -} - -void lov_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 lov_fix_desc_qos_maxage(__u32 *val) -{ - if (*val == 0) - *val = LOV_DESC_QOS_MAXAGE_DEFAULT; -} - -void lov_fix_desc(struct lov_desc *desc) -{ - lov_fix_desc_stripe_size(&desc->ld_default_stripe_size); - lov_fix_desc_stripe_count(&desc->ld_default_stripe_count); - lov_fix_desc_pattern(&desc->ld_pattern); - lov_fix_desc_qos_maxage(&desc->ld_qos_maxage); -} - -int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg) -{ - struct lprocfs_static_vars lvars = { NULL }; - struct lov_desc *desc; - struct lov_obd *lov = &obd->u.lov; - int rc; - - if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) { - CERROR("LOV 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; - } - } - - lov_fix_desc(desc); - - desc->ld_active_tgt_count = 0; - lov->desc = *desc; - lov->lov_tgt_size = 0; - - mutex_init(&lov->lov_lock); - atomic_set(&lov->lov_refcount, 0); - lov->lov_sp_me = LUSTRE_SP_CLI; - - init_rwsem(&lov->lov_notify_lock); - - lov->lov_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); - INIT_LIST_HEAD(&lov->lov_pool_list); - lov->lov_pool_count = 0; - rc = lov_ost_pool_init(&lov->lov_packed, 0); - if (rc) - goto out; - - lprocfs_lov_init_vars(&lvars); - lprocfs_obd_setup(obd, lvars.obd_vars, lvars.sysfs_vars); - - rc = ldebugfs_seq_create(obd->obd_debugfs_entry, "target_obd", - 0444, &lov_proc_target_fops, obd); - if (rc) - CWARN("Error adding the target_obd file\n"); - - lov->lov_pool_debugfs_entry = ldebugfs_register("pools", - obd->obd_debugfs_entry, - NULL, NULL); - return 0; - -out: - return rc; -} - -static int lov_cleanup(struct obd_device *obd) -{ - struct lov_obd *lov = &obd->u.lov; - struct pool_desc *pool, *tmp; - - list_for_each_entry_safe(pool, tmp, &lov->lov_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] */ - lov_pool_del(obd, pool->pool_name); - } - cfs_hash_putref(lov->lov_pools_hash_body); - lov_ost_pool_free(&lov->lov_packed); - - lprocfs_obd_cleanup(obd); - if (lov->lov_tgts) { - int i; - - obd_getref(obd); - for (i = 0; i < lov->desc.ld_tgt_count; i++) { - if (!lov->lov_tgts[i]) - continue; - - /* Inactive targets may never have connected */ - if (lov->lov_tgts[i]->ltd_active || - atomic_read(&lov->lov_refcount)) - /* We should never get here - these - * should have been removed in the - * disconnect. - */ - CERROR("lov tgt %d not cleaned! deathrow=%d, lovrc=%d\n", - i, lov->lov_death_row, - atomic_read(&lov->lov_refcount)); - lov_del_target(obd, i, NULL, 0); - } - obd_putref(obd); - kfree(lov->lov_tgts); - lov->lov_tgt_size = 0; - } - - if (lov->lov_cache) { - cl_cache_decref(lov->lov_cache); - lov->lov_cache = NULL; - } - - return 0; -} - -int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg, - __u32 *indexp, int *genp) -{ - struct obd_uuid obd_uuid; - int cmd; - int rc = 0; - - switch (cmd = lcfg->lcfg_command) { - case LCFG_LOV_ADD_OBD: - case LCFG_LOV_ADD_INA: - case LCFG_LOV_DEL_OBD: { - __u32 index; - int gen; - /* lov_modify_tgts add 0:lov_mdsA 1:ost1_UUID 2:0 3:1 */ - if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid)) { - rc = -EINVAL; - goto out; - } - - obd_str2uuid(&obd_uuid, lustre_cfg_buf(lcfg, 1)); - - rc = kstrtoint(lustre_cfg_buf(lcfg, 2), 10, indexp); - if (rc < 0) - goto out; - rc = kstrtoint(lustre_cfg_buf(lcfg, 3), 10, genp); - if (rc < 0) - goto out; - index = *indexp; - gen = *genp; - if (cmd == LCFG_LOV_ADD_OBD) - rc = lov_add_target(obd, &obd_uuid, index, gen, 1); - else if (cmd == LCFG_LOV_ADD_INA) - rc = lov_add_target(obd, &obd_uuid, index, gen, 0); - else - rc = lov_del_target(obd, index, &obd_uuid, gen); - goto out; - } - case LCFG_PARAM: { - struct lprocfs_static_vars lvars = { NULL }; - struct lov_desc *desc = &obd->u.lov.desc; - - if (!desc) { - rc = -EINVAL; - goto out; - } - - lprocfs_lov_init_vars(&lvars); - - rc = class_process_proc_param(PARAM_LOV, lvars.obd_vars, - lcfg, obd); - if (rc > 0) - rc = 0; - goto out; - } - case LCFG_POOL_NEW: - case LCFG_POOL_ADD: - case LCFG_POOL_DEL: - case LCFG_POOL_REM: - goto out; - - default: { - CERROR("Unknown command: %d\n", lcfg->lcfg_command); - rc = -EINVAL; - goto out; - } - } -out: - return rc; -} - -static int -lov_statfs_interpret(struct ptlrpc_request_set *rqset, void *data, int rc) -{ - struct lov_request_set *lovset = (struct lov_request_set *)data; - int err; - - if (rc) - atomic_set(&lovset->set_completes, 0); - - err = lov_fini_statfs_set(lovset); - return rc ? rc : err; -} - -static int lov_statfs_async(struct obd_export *exp, struct obd_info *oinfo, - __u64 max_age, struct ptlrpc_request_set *rqset) -{ - struct obd_device *obd = class_exp2obd(exp); - struct lov_request_set *set; - struct lov_request *req; - struct lov_obd *lov; - int rc = 0; - - LASSERT(oinfo->oi_osfs); - - lov = &obd->u.lov; - rc = lov_prep_statfs_set(obd, oinfo, &set); - if (rc) - return rc; - - list_for_each_entry(req, &set->set_list, rq_link) { - rc = obd_statfs_async(lov->lov_tgts[req->rq_idx]->ltd_exp, - &req->rq_oi, max_age, rqset); - if (rc) - break; - } - - if (rc || list_empty(&rqset->set_requests)) { - int err; - - if (rc) - atomic_set(&set->set_completes, 0); - err = lov_fini_statfs_set(set); - return rc ? rc : err; - } - - LASSERT(!rqset->set_interpret); - rqset->set_interpret = lov_statfs_interpret; - rqset->set_arg = (void *)set; - return 0; -} - -static int lov_statfs(const struct lu_env *env, struct obd_export *exp, - struct obd_statfs *osfs, __u64 max_age, __u32 flags) -{ - struct ptlrpc_request_set *set = NULL; - struct obd_info oinfo = { - .oi_osfs = osfs, - .oi_flags = flags, - }; - int rc = 0; - - /* for obdclass we forbid using obd_statfs_rqset, but prefer using async - * statfs requests - */ - set = ptlrpc_prep_set(); - if (!set) - return -ENOMEM; - - rc = lov_statfs_async(exp, &oinfo, max_age, set); - if (rc == 0) - rc = ptlrpc_set_wait(set); - ptlrpc_set_destroy(set); - - return rc; -} - -static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len, - void *karg, void __user *uarg) -{ - struct obd_device *obddev = class_exp2obd(exp); - struct lov_obd *lov = &obddev->u.lov; - int i = 0, rc = 0, count = lov->desc.ld_tgt_count; - struct obd_uuid *uuidp; - - switch (cmd) { - case IOC_OBD_STATFS: { - struct obd_ioctl_data *data = karg; - struct obd_device *osc_obd; - struct obd_statfs stat_buf = {0}; - __u32 index; - __u32 flags; - - memcpy(&index, data->ioc_inlbuf2, sizeof(__u32)); - if (index >= count) - return -ENODEV; - - if (!lov->lov_tgts[index]) - /* Try again with the next index */ - return -EAGAIN; - if (!lov->lov_tgts[index]->ltd_active) - return -ENODATA; - - osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp); - if (!osc_obd) - return -EINVAL; - - /* copy UUID */ - if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd), - min_t(unsigned long, data->ioc_plen2, - sizeof(struct obd_uuid)))) - return -EFAULT; - - memcpy(&flags, data->ioc_inlbuf1, sizeof(__u32)); - flags = flags & LL_STATFS_NODELAY ? OBD_STATFS_NODELAY : 0; - - /* got statfs data */ - rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf, - cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS), - flags); - if (rc) - return rc; - if (copy_to_user(data->ioc_pbuf1, &stat_buf, - min_t(unsigned long, data->ioc_plen1, - sizeof(stat_buf)))) - return -EFAULT; - break; - } - case OBD_IOC_LOV_GET_CONFIG: { - struct obd_ioctl_data *data; - struct lov_desc *desc; - char *buf = NULL; - __u32 *genp; - - len = 0; - if (obd_ioctl_getdata(&buf, &len, uarg)) - return -EINVAL; - - data = (struct obd_ioctl_data *)buf; - - if (sizeof(*desc) > data->ioc_inllen1) { - kvfree(buf); - return -EINVAL; - } - - if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) { - kvfree(buf); - return -EINVAL; - } - - if (sizeof(__u32) * count > data->ioc_inllen3) { - kvfree(buf); - return -EINVAL; - } - - desc = (struct lov_desc *)data->ioc_inlbuf1; - memcpy(desc, &lov->desc, sizeof(*desc)); - - uuidp = (struct obd_uuid *)data->ioc_inlbuf2; - genp = (__u32 *)data->ioc_inlbuf3; - /* the uuid will be empty for deleted OSTs */ - for (i = 0; i < count; i++, uuidp++, genp++) { - if (!lov->lov_tgts[i]) - continue; - *uuidp = lov->lov_tgts[i]->ltd_uuid; - *genp = lov->lov_tgts[i]->ltd_gen; - } - - if (copy_to_user(uarg, buf, len)) - rc = -EFAULT; - kvfree(buf); - break; - } - case OBD_IOC_QUOTACTL: { - struct if_quotactl *qctl = karg; - struct lov_tgt_desc *tgt = NULL; - struct obd_quotactl *oqctl; - - if (qctl->qc_valid == QC_OSTIDX) { - if (count <= qctl->qc_idx) - return -EINVAL; - - tgt = lov->lov_tgts[qctl->qc_idx]; - if (!tgt || !tgt->ltd_exp) - return -EINVAL; - } else if (qctl->qc_valid == QC_UUID) { - for (i = 0; i < count; i++) { - tgt = lov->lov_tgts[i]; - if (!tgt || - !obd_uuid_equals(&tgt->ltd_uuid, - &qctl->obd_uuid)) - continue; - - if (!tgt->ltd_exp) - return -EINVAL; - - break; - } - } else { - return -EINVAL; - } - - if (i >= count) - return -EAGAIN; - - LASSERT(tgt && tgt->ltd_exp); - oqctl = kzalloc(sizeof(*oqctl), GFP_NOFS); - if (!oqctl) - return -ENOMEM; - - QCTL_COPY(oqctl, qctl); - rc = obd_quotactl(tgt->ltd_exp, oqctl); - if (rc == 0) { - QCTL_COPY(qctl, oqctl); - qctl->qc_valid = QC_OSTIDX; - qctl->obd_uuid = tgt->ltd_uuid; - } - kfree(oqctl); - break; - } - default: { - int set = 0; - - if (count == 0) - return -ENOTTY; - - for (i = 0; i < count; i++) { - int err; - struct obd_device *osc_obd; - - /* OST was disconnected */ - if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp) - continue; - - /* ll_umount_begin() sets force flag but for lov, not - * osc. Let's pass it through - */ - osc_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp); - osc_obd->obd_force = obddev->obd_force; - err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp, - len, karg, uarg); - if (err) { - if (lov->lov_tgts[i]->ltd_active) { - CDEBUG(err == -ENOTTY ? - D_IOCTL : D_WARNING, - "iocontrol OSC %s on OST idx %d cmd %x: err = %d\n", - lov_uuid2str(lov, i), - i, cmd, err); - if (!rc) - rc = err; - } - } else { - set = 1; - } - } - if (!set && !rc) - rc = -EIO; - } - } - - return rc; -} - -static int lov_get_info(const struct lu_env *env, struct obd_export *exp, - __u32 keylen, void *key, __u32 *vallen, void *val) -{ - struct obd_device *obddev = class_exp2obd(exp); - struct lov_obd *lov = &obddev->u.lov; - struct lov_desc *ld = &lov->desc; - int rc = 0; - - if (!vallen || !val) - return -EFAULT; - - obd_getref(obddev); - - if (KEY_IS(KEY_MAX_EASIZE)) { - u32 max_stripe_count = min_t(u32, ld->ld_active_tgt_count, - LOV_MAX_STRIPE_COUNT); - - *((u32 *)val) = lov_mds_md_size(max_stripe_count, LOV_MAGIC_V3); - } else if (KEY_IS(KEY_DEFAULT_EASIZE)) { - u32 def_stripe_count = min_t(u32, ld->ld_default_stripe_count, - LOV_MAX_STRIPE_COUNT); - - *((u32 *)val) = lov_mds_md_size(def_stripe_count, LOV_MAGIC_V3); - } else if (KEY_IS(KEY_TGT_COUNT)) { - *((int *)val) = lov->desc.ld_tgt_count; - } else { - rc = -EINVAL; - } - - obd_putref(obddev); - return rc; -} - -static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp, - u32 keylen, void *key, u32 vallen, - void *val, struct ptlrpc_request_set *set) -{ - struct obd_device *obddev = class_exp2obd(exp); - struct lov_obd *lov = &obddev->u.lov; - u32 count; - int i, rc = 0, err; - struct lov_tgt_desc *tgt; - int do_inactive = 0, no_set = 0; - - if (!set) { - no_set = 1; - set = ptlrpc_prep_set(); - if (!set) - return -ENOMEM; - } - - obd_getref(obddev); - count = lov->desc.ld_tgt_count; - - if (KEY_IS(KEY_CHECKSUM)) { - do_inactive = 1; - } else if (KEY_IS(KEY_CACHE_SET)) { - LASSERT(!lov->lov_cache); - lov->lov_cache = val; - do_inactive = 1; - cl_cache_incref(lov->lov_cache); - } - - for (i = 0; i < count; i++) { - tgt = lov->lov_tgts[i]; - - /* OST was disconnected */ - if (!tgt || !tgt->ltd_exp) - continue; - - /* OST is inactive and we don't want inactive OSCs */ - if (!tgt->ltd_active && !do_inactive) - continue; - - err = obd_set_info_async(env, tgt->ltd_exp, keylen, key, - vallen, val, set); - if (!rc) - rc = err; - } - - obd_putref(obddev); - if (no_set) { - err = ptlrpc_set_wait(set); - if (!rc) - rc = err; - ptlrpc_set_destroy(set); - } - return rc; -} - -void lov_stripe_lock(struct lov_stripe_md *md) - __acquires(&md->lsm_lock) -{ - LASSERT(md->lsm_lock_owner != current_pid()); - spin_lock(&md->lsm_lock); - LASSERT(md->lsm_lock_owner == 0); - md->lsm_lock_owner = current_pid(); -} - -void lov_stripe_unlock(struct lov_stripe_md *md) - __releases(&md->lsm_lock) -{ - LASSERT(md->lsm_lock_owner == current_pid()); - md->lsm_lock_owner = 0; - spin_unlock(&md->lsm_lock); -} - -static int lov_quotactl(struct obd_device *obd, struct obd_export *exp, - struct obd_quotactl *oqctl) -{ - struct lov_obd *lov = &obd->u.lov; - struct lov_tgt_desc *tgt; - __u64 curspace = 0; - __u64 bhardlimit = 0; - int i, rc = 0; - - if (oqctl->qc_cmd != Q_GETOQUOTA && - oqctl->qc_cmd != LUSTRE_Q_SETQUOTA) { - CERROR("bad quota opc %x for lov obd\n", oqctl->qc_cmd); - return -EFAULT; - } - - /* for lov tgt */ - obd_getref(obd); - for (i = 0; i < lov->desc.ld_tgt_count; i++) { - int err; - - tgt = lov->lov_tgts[i]; - - if (!tgt) - continue; - - if (!tgt->ltd_active || tgt->ltd_reap) { - if (oqctl->qc_cmd == Q_GETOQUOTA && - lov->lov_tgts[i]->ltd_activate) { - rc = -EREMOTEIO; - CERROR("ost %d is inactive\n", i); - } else { - CDEBUG(D_HA, "ost %d is inactive\n", i); - } - continue; - } - - err = obd_quotactl(tgt->ltd_exp, oqctl); - if (err) { - if (tgt->ltd_active && !rc) - rc = err; - continue; - } - - if (oqctl->qc_cmd == Q_GETOQUOTA) { - curspace += oqctl->qc_dqblk.dqb_curspace; - bhardlimit += oqctl->qc_dqblk.dqb_bhardlimit; - } - } - obd_putref(obd); - - if (oqctl->qc_cmd == Q_GETOQUOTA) { - oqctl->qc_dqblk.dqb_curspace = curspace; - oqctl->qc_dqblk.dqb_bhardlimit = bhardlimit; - } - return rc; -} - -static struct obd_ops lov_obd_ops = { - .owner = THIS_MODULE, - .setup = lov_setup, - .cleanup = lov_cleanup, - /*.process_config = lov_process_config,*/ - .connect = lov_connect, - .disconnect = lov_disconnect, - .statfs = lov_statfs, - .statfs_async = lov_statfs_async, - .iocontrol = lov_iocontrol, - .get_info = lov_get_info, - .set_info_async = lov_set_info_async, - .notify = lov_notify, - .pool_new = lov_pool_new, - .pool_rem = lov_pool_remove, - .pool_add = lov_pool_add, - .pool_del = lov_pool_del, - .getref = lov_getref, - .putref = lov_putref, - .quotactl = lov_quotactl, -}; - -struct kmem_cache *lov_oinfo_slab; - -static int __init lov_init(void) -{ - struct lprocfs_static_vars lvars = { NULL }; - int rc; - - /* print an address of _any_ initialized kernel symbol from this - * module, to allow debugging with gdb that doesn't support data - * symbols from modules. - */ - CDEBUG(D_INFO, "Lustre LOV module (%p).\n", &lov_caches); - - rc = lu_kmem_init(lov_caches); - if (rc) - return rc; - - lov_oinfo_slab = kmem_cache_create("lov_oinfo", - sizeof(struct lov_oinfo), - 0, SLAB_HWCACHE_ALIGN, NULL); - if (!lov_oinfo_slab) { - lu_kmem_fini(lov_caches); - return -ENOMEM; - } - lprocfs_lov_init_vars(&lvars); - - rc = class_register_type(&lov_obd_ops, NULL, - LUSTRE_LOV_NAME, &lov_device_type); - - if (rc) { - kmem_cache_destroy(lov_oinfo_slab); - lu_kmem_fini(lov_caches); - } - - return rc; -} - -static void /*__exit*/ lov_exit(void) -{ - class_unregister_type(LUSTRE_LOV_NAME); - kmem_cache_destroy(lov_oinfo_slab); - - lu_kmem_fini(lov_caches); -} - -MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>"); -MODULE_DESCRIPTION("Lustre Logical Object Volume"); -MODULE_LICENSE("GPL"); -MODULE_VERSION(LUSTRE_VERSION_STRING); - -module_init(lov_init); -module_exit(lov_exit); |