diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/lov/lov_obd.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/lov/lov_obd.c | 2916 |
1 files changed, 2916 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/lov/lov_obd.c b/drivers/staging/lustre/lustre/lov/lov_obd.c new file mode 100644 index 000000000000..ef7ff091f048 --- /dev/null +++ b/drivers/staging/lustre/lustre/lov/lov_obd.c @@ -0,0 +1,2916 @@ +/* + * 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) 2002, 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. + * + * 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 <obd_support.h> +#include <lustre_lib.h> +#include <lustre_net.h> +#include <lustre/lustre_idl.h> +#include <lustre_dlm.h> +#include <lustre_mds.h> +#include <lustre_debug.h> +#include <obd_class.h> +#include <obd_lov.h> +#include <obd_ost.h> +#include <lprocfs_status.h> +#include <lustre_param.h> +#include <cl_object.h> +#include <lclient.h> /* for cl_client_lru */ +#include <lustre/ll_fiemap.h> +#include <lustre_log.h> +#include <lustre_fid.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); + return; +} + +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); + } + } 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); + + +#define MAX_STRING_SIZE 128 +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; + proc_dir_entry_t *lov_proc_dir; + int rc; + ENTRY; + + 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"); + + lov_proc_dir = obd->obd_proc_private; + if (lov_proc_dir) { + struct obd_device *osc_obd = lov->lov_tgts[index]->ltd_exp->exp_obd; + proc_dir_entry_t *osc_symlink; + + LASSERT(osc_obd != NULL); + LASSERT(osc_obd->obd_magic == OBD_DEVICE_MAGIC); + LASSERT(osc_obd->obd_type->typ_name != NULL); + + osc_symlink = lprocfs_add_symlink(osc_obd->obd_name, + lov_proc_dir, + "../../../%s/%s", + osc_obd->obd_type->typ_name, + osc_obd->obd_name); + if (osc_symlink == NULL) { + CERROR("could not register LOV target " + "/proc/fs/lustre/%s/%s/target_obds/%s.", + obd->obd_type->typ_name, obd->obd_name, + osc_obd->obd_name); + lprocfs_remove(&lov_proc_dir); + obd->obd_proc_private = NULL; + } + } + + 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; + ENTRY; + + 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); + 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) +{ + proc_dir_entry_t *lov_proc_dir; + struct lov_obd *lov = &obd->u.lov; + struct obd_device *osc_obd; + int rc; + ENTRY; + + osc_obd = class_exp2obd(tgt->ltd_exp); + CDEBUG(D_CONFIG, "%s: disconnecting target %s\n", + obd->obd_name, osc_obd->obd_name); + + if (tgt->ltd_active) { + tgt->ltd_active = 0; + lov->desc.ld_active_tgt_count--; + tgt->ltd_exp->exp_obd->obd_inactive = 1; + } + + lov_proc_dir = obd->obd_proc_private; + if (lov_proc_dir) + lprocfs_remove_proc_entry(osc_obd->obd_name, lov_proc_dir); + + if (osc_obd) { + /* 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; + ENTRY; + + 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, 0, 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; + ENTRY; + + 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 == NULL && + 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 "LPX64"\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) + GOTO(out, index = -EINVAL); + + 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, index); + } else { + 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; + ENTRY; + + 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; + ENTRY; + + 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 == NULL) + RETURN(-EINVAL); + + mutex_lock(&lov->lov_lock); + + if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) { + 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(lov->lov_tgt_size, (__u32)2); + while (newsize < index + 1) + newsize = newsize << 1; + OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize); + if (newtgts == NULL) { + 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(); + if (old) + OBD_FREE(old, sizeof(*old) * oldsize); + + CDEBUG(D_CONFIG, "tgts: %p size: %d\n", + lov->lov_tgts, lov->lov_tgt_size); + } + + OBD_ALLOC_PTR(tgt); + 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); + OBD_FREE_PTR(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); + + rc = obd_notify(obd, tgt_obd, OBD_NOTIFY_CREATE, &index); + + 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, rc); + + /* connect to administrative disabled ost */ + if (!tgt->ltd_exp) + GOTO(out, rc = 0); + + if (lov->lov_cache != NULL) { + 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); + } + + 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, 0, 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; + ENTRY; + + 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); + GOTO(out, rc = -EINVAL); + } + + 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)); + GOTO(out, rc = -EINVAL); + } + + 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); + + OBD_FREE_PTR(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_DEFAULT_STRIPE_SIZE); + *val = LOV_DEFAULT_STRIPE_SIZE; + } 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 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) +{ + /* fix qos_maxage */ + if (*val == 0) + *val = QOS_DEFAULT_MAXAGE; +} + +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 = { 0 }; + struct lov_desc *desc; + struct lov_obd *lov = &obd->u.lov; + int rc; + ENTRY; + + 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, rc); + + lprocfs_lov_init_vars(&lvars); + lprocfs_obd_setup(obd, lvars.obd_vars); +#ifdef LPROCFS + { + int rc; + + rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd", + 0444, &lov_proc_target_fops, obd); + if (rc) + CWARN("Error adding the target_obd file\n"); + } +#endif + lov->lov_pool_proc_entry = lprocfs_register("pools", + obd->obd_proc_entry, + NULL, NULL); + + RETURN(0); + +out: + return rc; +} + +static int lov_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage) +{ + int rc = 0; + struct lov_obd *lov = &obd->u.lov; + + ENTRY; + + switch (stage) { + case OBD_CLEANUP_EARLY: { + int i; + for (i = 0; i < lov->desc.ld_tgt_count; i++) { + if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active) + continue; + obd_precleanup(class_exp2obd(lov->lov_tgts[i]->ltd_exp), + OBD_CLEANUP_EARLY); + } + break; + } + case OBD_CLEANUP_EXPORTS: + rc = obd_llog_finish(obd, 0); + if (rc != 0) + CERROR("failed to cleanup llogging subsystems\n"); + break; + } + RETURN(rc); +} + +static int lov_cleanup(struct obd_device *obd) +{ + struct lov_obd *lov = &obd->u.lov; + struct list_head *pos, *tmp; + struct pool_desc *pool; + ENTRY; + + list_for_each_safe(pos, tmp, &lov->lov_pool_list) { + pool = list_entry(pos, struct pool_desc, 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, 0, 0); + } + obd_putref(obd); + OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) * + lov->lov_tgt_size); + lov->lov_tgt_size = 0; + } + 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; + ENTRY; + + 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)) + GOTO(out, rc = -EINVAL); + + obd_str2uuid(&obd_uuid, lustre_cfg_buf(lcfg, 1)); + + if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", indexp) != 1) + GOTO(out, rc = -EINVAL); + if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", genp) != 1) + GOTO(out, rc = -EINVAL); + 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, rc); + } + case LCFG_PARAM: { + struct lprocfs_static_vars lvars = { 0 }; + struct lov_desc *desc = &(obd->u.lov.desc); + + if (!desc) + GOTO(out, rc = -EINVAL); + + lprocfs_lov_init_vars(&lvars); + + rc = class_process_proc_param(PARAM_LOV, lvars.obd_vars, + lcfg, obd); + if (rc > 0) + rc = 0; + GOTO(out, rc); + } + case LCFG_POOL_NEW: + case LCFG_POOL_ADD: + case LCFG_POOL_DEL: + case LCFG_POOL_REM: + GOTO(out, rc); + + default: { + CERROR("Unknown command: %d\n", lcfg->lcfg_command); + GOTO(out, rc = -EINVAL); + + } + } +out: + RETURN(rc); +} + +static int lov_recreate(struct obd_export *exp, struct obdo *src_oa, + struct lov_stripe_md **ea, struct obd_trans_info *oti) +{ + struct lov_stripe_md *obj_mdp, *lsm; + struct lov_obd *lov = &exp->exp_obd->u.lov; + unsigned ost_idx; + int rc, i; + ENTRY; + + LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS && + src_oa->o_flags & OBD_FL_RECREATE_OBJS); + + OBD_ALLOC(obj_mdp, sizeof(*obj_mdp)); + if (obj_mdp == NULL) + RETURN(-ENOMEM); + + ost_idx = src_oa->o_nlink; + lsm = *ea; + if (lsm == NULL) + GOTO(out, rc = -EINVAL); + if (ost_idx >= lov->desc.ld_tgt_count || + !lov->lov_tgts[ost_idx]) + GOTO(out, rc = -EINVAL); + + for (i = 0; i < lsm->lsm_stripe_count; i++) { + if (lsm->lsm_oinfo[i]->loi_ost_idx == ost_idx) { + if (ostid_id(&lsm->lsm_oinfo[i]->loi_oi) != + ostid_id(&src_oa->o_oi)) + GOTO(out, rc = -EINVAL); + break; + } + } + if (i == lsm->lsm_stripe_count) + GOTO(out, rc = -EINVAL); + + rc = obd_create(NULL, lov->lov_tgts[ost_idx]->ltd_exp, + src_oa, &obj_mdp, oti); +out: + OBD_FREE(obj_mdp, sizeof(*obj_mdp)); + RETURN(rc); +} + +/* the LOV expects oa->o_id to be set to the LOV object id */ +static int lov_create(const struct lu_env *env, struct obd_export *exp, + struct obdo *src_oa, struct lov_stripe_md **ea, + struct obd_trans_info *oti) +{ + struct lov_obd *lov; + int rc = 0; + ENTRY; + + LASSERT(ea != NULL); + if (exp == NULL) + RETURN(-EINVAL); + + if ((src_oa->o_valid & OBD_MD_FLFLAGS) && + src_oa->o_flags == OBD_FL_DELORPHAN) { + /* should be used with LOV anymore */ + LBUG(); + } + + lov = &exp->exp_obd->u.lov; + if (!lov->desc.ld_active_tgt_count) + RETURN(-EIO); + + obd_getref(exp->exp_obd); + /* Recreate a specific object id at the given OST index */ + if ((src_oa->o_valid & OBD_MD_FLFLAGS) && + (src_oa->o_flags & OBD_FL_RECREATE_OBJS)) { + rc = lov_recreate(exp, src_oa, ea, oti); + } + + obd_putref(exp->exp_obd); + RETURN(rc); +} + +#define ASSERT_LSM_MAGIC(lsmp) \ +do { \ + LASSERT((lsmp) != NULL); \ + LASSERTF(((lsmp)->lsm_magic == LOV_MAGIC_V1 || \ + (lsmp)->lsm_magic == LOV_MAGIC_V3), \ + "%p->lsm_magic=%x\n", (lsmp), (lsmp)->lsm_magic); \ +} while (0) + +static int lov_destroy(const struct lu_env *env, struct obd_export *exp, + struct obdo *oa, struct lov_stripe_md *lsm, + struct obd_trans_info *oti, struct obd_export *md_exp, + void *capa) +{ + struct lov_request_set *set; + struct obd_info oinfo; + struct lov_request *req; + struct list_head *pos; + struct lov_obd *lov; + int rc = 0, err = 0; + ENTRY; + + ASSERT_LSM_MAGIC(lsm); + + if (!exp || !exp->exp_obd) + RETURN(-ENODEV); + + if (oa->o_valid & OBD_MD_FLCOOKIE) { + LASSERT(oti); + LASSERT(oti->oti_logcookies); + } + + lov = &exp->exp_obd->u.lov; + obd_getref(exp->exp_obd); + rc = lov_prep_destroy_set(exp, &oinfo, oa, lsm, oti, &set); + if (rc) + GOTO(out, rc); + + list_for_each (pos, &set->set_list) { + req = list_entry(pos, struct lov_request, rq_link); + + if (oa->o_valid & OBD_MD_FLCOOKIE) + oti->oti_logcookies = set->set_cookies + req->rq_stripe; + + err = obd_destroy(env, lov->lov_tgts[req->rq_idx]->ltd_exp, + req->rq_oi.oi_oa, NULL, oti, NULL, capa); + err = lov_update_common_set(set, req, err); + if (err) { + CERROR("%s: destroying objid "DOSTID" subobj " + DOSTID" on OST idx %d: rc = %d\n", + exp->exp_obd->obd_name, POSTID(&oa->o_oi), + POSTID(&req->rq_oi.oi_oa->o_oi), + req->rq_idx, err); + if (!rc) + rc = err; + } + } + + if (rc == 0) { + LASSERT(lsm_op_find(lsm->lsm_magic) != NULL); + rc = lsm_op_find(lsm->lsm_magic)->lsm_destroy(lsm, oa, md_exp); + } + err = lov_fini_destroy_set(set); +out: + obd_putref(exp->exp_obd); + RETURN(rc ? rc : err); +} + +static int lov_getattr(const struct lu_env *env, struct obd_export *exp, + struct obd_info *oinfo) +{ + struct lov_request_set *set; + struct lov_request *req; + struct list_head *pos; + struct lov_obd *lov; + int err = 0, rc = 0; + ENTRY; + + LASSERT(oinfo); + ASSERT_LSM_MAGIC(oinfo->oi_md); + + if (!exp || !exp->exp_obd) + RETURN(-ENODEV); + + lov = &exp->exp_obd->u.lov; + + rc = lov_prep_getattr_set(exp, oinfo, &set); + if (rc) + RETURN(rc); + + list_for_each (pos, &set->set_list) { + req = list_entry(pos, struct lov_request, rq_link); + + CDEBUG(D_INFO, "objid "DOSTID"[%d] has subobj "DOSTID" at idx" + " %u\n", POSTID(&oinfo->oi_oa->o_oi), req->rq_stripe, + POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx); + + rc = obd_getattr(env, lov->lov_tgts[req->rq_idx]->ltd_exp, + &req->rq_oi); + err = lov_update_common_set(set, req, rc); + if (err) { + CERROR("%s: getattr objid "DOSTID" subobj " + DOSTID" on OST idx %d: rc = %d\n", + exp->exp_obd->obd_name, + POSTID(&oinfo->oi_oa->o_oi), + POSTID(&req->rq_oi.oi_oa->o_oi), + req->rq_idx, err); + break; + } + } + + rc = lov_fini_getattr_set(set); + if (err) + rc = err; + RETURN(rc); +} + +static int lov_getattr_interpret(struct ptlrpc_request_set *rqset, + void *data, int rc) +{ + struct lov_request_set *lovset = (struct lov_request_set *)data; + int err; + ENTRY; + + /* don't do attribute merge if this aysnc op failed */ + if (rc) + atomic_set(&lovset->set_completes, 0); + err = lov_fini_getattr_set(lovset); + RETURN(rc ? rc : err); +} + +static int lov_getattr_async(struct obd_export *exp, struct obd_info *oinfo, + struct ptlrpc_request_set *rqset) +{ + struct lov_request_set *lovset; + struct lov_obd *lov; + struct list_head *pos; + struct lov_request *req; + int rc = 0, err; + ENTRY; + + LASSERT(oinfo); + ASSERT_LSM_MAGIC(oinfo->oi_md); + + if (!exp || !exp->exp_obd) + RETURN(-ENODEV); + + lov = &exp->exp_obd->u.lov; + + rc = lov_prep_getattr_set(exp, oinfo, &lovset); + if (rc) + RETURN(rc); + + CDEBUG(D_INFO, "objid "DOSTID": %ux%u byte stripes\n", + POSTID(&oinfo->oi_md->lsm_oi), oinfo->oi_md->lsm_stripe_count, + oinfo->oi_md->lsm_stripe_size); + + list_for_each(pos, &lovset->set_list) { + req = list_entry(pos, struct lov_request, rq_link); + + CDEBUG(D_INFO, "objid "DOSTID"[%d] has subobj "DOSTID" at idx" + "%u\n", POSTID(&oinfo->oi_oa->o_oi), req->rq_stripe, + POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx); + rc = obd_getattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp, + &req->rq_oi, rqset); + if (rc) { + CERROR("%s: getattr objid "DOSTID" subobj" + DOSTID" on OST idx %d: rc = %d\n", + exp->exp_obd->obd_name, + POSTID(&oinfo->oi_oa->o_oi), + POSTID(&req->rq_oi.oi_oa->o_oi), + req->rq_idx, rc); + GOTO(out, rc); + } + } + + if (!list_empty(&rqset->set_requests)) { + LASSERT(rc == 0); + LASSERT (rqset->set_interpret == NULL); + rqset->set_interpret = lov_getattr_interpret; + rqset->set_arg = (void *)lovset; + RETURN(rc); + } +out: + if (rc) + atomic_set(&lovset->set_completes, 0); + err = lov_fini_getattr_set(lovset); + RETURN(rc ? rc : err); +} + +static int lov_setattr(const struct lu_env *env, struct obd_export *exp, + struct obd_info *oinfo, struct obd_trans_info *oti) +{ + struct lov_request_set *set; + struct lov_obd *lov; + struct list_head *pos; + struct lov_request *req; + int err = 0, rc = 0; + ENTRY; + + LASSERT(oinfo); + ASSERT_LSM_MAGIC(oinfo->oi_md); + + if (!exp || !exp->exp_obd) + RETURN(-ENODEV); + + /* for now, we only expect the following updates here */ + LASSERT(!(oinfo->oi_oa->o_valid & ~(OBD_MD_FLID | OBD_MD_FLTYPE | + OBD_MD_FLMODE | OBD_MD_FLATIME | + OBD_MD_FLMTIME | OBD_MD_FLCTIME | + OBD_MD_FLFLAGS | OBD_MD_FLSIZE | + OBD_MD_FLGROUP | OBD_MD_FLUID | + OBD_MD_FLGID | OBD_MD_FLFID | + OBD_MD_FLGENER))); + lov = &exp->exp_obd->u.lov; + rc = lov_prep_setattr_set(exp, oinfo, oti, &set); + if (rc) + RETURN(rc); + + list_for_each (pos, &set->set_list) { + req = list_entry(pos, struct lov_request, rq_link); + + rc = obd_setattr(env, lov->lov_tgts[req->rq_idx]->ltd_exp, + &req->rq_oi, NULL); + err = lov_update_setattr_set(set, req, rc); + if (err) { + CERROR("%s: setattr objid "DOSTID" subobj " + DOSTID" on OST idx %d: rc = %d\n", + exp->exp_obd->obd_name, + POSTID(&set->set_oi->oi_oa->o_oi), + POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx, + err); + if (!rc) + rc = err; + } + } + err = lov_fini_setattr_set(set); + if (!rc) + rc = err; + RETURN(rc); +} + +static int lov_setattr_interpret(struct ptlrpc_request_set *rqset, + void *data, int rc) +{ + struct lov_request_set *lovset = (struct lov_request_set *)data; + int err; + ENTRY; + + if (rc) + atomic_set(&lovset->set_completes, 0); + err = lov_fini_setattr_set(lovset); + RETURN(rc ? rc : err); +} + +/* If @oti is given, the request goes from MDS and responses from OSTs are not + needed. Otherwise, a client is waiting for responses. */ +static int lov_setattr_async(struct obd_export *exp, struct obd_info *oinfo, + struct obd_trans_info *oti, + struct ptlrpc_request_set *rqset) +{ + struct lov_request_set *set; + struct lov_request *req; + struct list_head *pos; + struct lov_obd *lov; + int rc = 0; + ENTRY; + + LASSERT(oinfo); + ASSERT_LSM_MAGIC(oinfo->oi_md); + if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) { + LASSERT(oti); + LASSERT(oti->oti_logcookies); + } + + if (!exp || !exp->exp_obd) + RETURN(-ENODEV); + + lov = &exp->exp_obd->u.lov; + rc = lov_prep_setattr_set(exp, oinfo, oti, &set); + if (rc) + RETURN(rc); + + CDEBUG(D_INFO, "objid "DOSTID": %ux%u byte stripes\n", + POSTID(&oinfo->oi_md->lsm_oi), + oinfo->oi_md->lsm_stripe_count, + oinfo->oi_md->lsm_stripe_size); + + list_for_each(pos, &set->set_list) { + req = list_entry(pos, struct lov_request, rq_link); + + if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) + oti->oti_logcookies = set->set_cookies + req->rq_stripe; + + CDEBUG(D_INFO, "objid "DOSTID"[%d] has subobj "DOSTID" at idx" + "%u\n", POSTID(&oinfo->oi_oa->o_oi), req->rq_stripe, + POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx); + + rc = obd_setattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp, + &req->rq_oi, oti, rqset); + if (rc) { + CERROR("error: setattr objid "DOSTID" subobj" + DOSTID" on OST idx %d: rc = %d\n", + POSTID(&set->set_oi->oi_oa->o_oi), + POSTID(&req->rq_oi.oi_oa->o_oi), + req->rq_idx, rc); + break; + } + } + + /* If we are not waiting for responses on async requests, return. */ + if (rc || !rqset || list_empty(&rqset->set_requests)) { + int err; + if (rc) + atomic_set(&set->set_completes, 0); + err = lov_fini_setattr_set(set); + RETURN(rc ? rc : err); + } + + LASSERT(rqset->set_interpret == NULL); + rqset->set_interpret = lov_setattr_interpret; + rqset->set_arg = (void *)set; + + RETURN(0); +} + +static int lov_punch_interpret(struct ptlrpc_request_set *rqset, + void *data, int rc) +{ + struct lov_request_set *lovset = (struct lov_request_set *)data; + int err; + ENTRY; + + if (rc) + atomic_set(&lovset->set_completes, 0); + err = lov_fini_punch_set(lovset); + RETURN(rc ? rc : err); +} + +/* FIXME: maybe we'll just make one node the authoritative attribute node, then + * we can send this 'punch' to just the authoritative node and the nodes + * that the punch will affect. */ +static int lov_punch(const struct lu_env *env, struct obd_export *exp, + struct obd_info *oinfo, struct obd_trans_info *oti, + struct ptlrpc_request_set *rqset) +{ + struct lov_request_set *set; + struct lov_obd *lov; + struct list_head *pos; + struct lov_request *req; + int rc = 0; + ENTRY; + + LASSERT(oinfo); + ASSERT_LSM_MAGIC(oinfo->oi_md); + + if (!exp || !exp->exp_obd) + RETURN(-ENODEV); + + lov = &exp->exp_obd->u.lov; + rc = lov_prep_punch_set(exp, oinfo, oti, &set); + if (rc) + RETURN(rc); + + list_for_each (pos, &set->set_list) { + req = list_entry(pos, struct lov_request, rq_link); + + rc = obd_punch(env, lov->lov_tgts[req->rq_idx]->ltd_exp, + &req->rq_oi, NULL, rqset); + if (rc) { + CERROR("%s: punch objid "DOSTID" subobj "DOSTID + " on OST idx %d: rc = %d\n", + exp->exp_obd->obd_name, + POSTID(&set->set_oi->oi_oa->o_oi), + POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx, rc); + break; + } + } + + if (rc || list_empty(&rqset->set_requests)) { + int err; + err = lov_fini_punch_set(set); + RETURN(rc ? rc : err); + } + + LASSERT(rqset->set_interpret == NULL); + rqset->set_interpret = lov_punch_interpret; + rqset->set_arg = (void *)set; + + RETURN(0); +} + +static int lov_sync_interpret(struct ptlrpc_request_set *rqset, + void *data, int rc) +{ + struct lov_request_set *lovset = data; + int err; + ENTRY; + + if (rc) + atomic_set(&lovset->set_completes, 0); + err = lov_fini_sync_set(lovset); + RETURN(rc ?: err); +} + +static int lov_sync(const struct lu_env *env, struct obd_export *exp, + struct obd_info *oinfo, obd_off start, obd_off end, + struct ptlrpc_request_set *rqset) +{ + struct lov_request_set *set = NULL; + struct lov_obd *lov; + struct list_head *pos; + struct lov_request *req; + int rc = 0; + ENTRY; + + ASSERT_LSM_MAGIC(oinfo->oi_md); + LASSERT(rqset != NULL); + + if (!exp->exp_obd) + RETURN(-ENODEV); + + lov = &exp->exp_obd->u.lov; + rc = lov_prep_sync_set(exp, oinfo, start, end, &set); + if (rc) + RETURN(rc); + + CDEBUG(D_INFO, "fsync objid "DOSTID" ["LPX64", "LPX64"]\n", + POSTID(&set->set_oi->oi_oa->o_oi), start, end); + + list_for_each (pos, &set->set_list) { + req = list_entry(pos, struct lov_request, rq_link); + + rc = obd_sync(env, lov->lov_tgts[req->rq_idx]->ltd_exp, + &req->rq_oi, req->rq_oi.oi_policy.l_extent.start, + req->rq_oi.oi_policy.l_extent.end, rqset); + if (rc) { + CERROR("%s: fsync objid "DOSTID" subobj "DOSTID + " on OST idx %d: rc = %d\n", + exp->exp_obd->obd_name, + POSTID(&set->set_oi->oi_oa->o_oi), + POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx, + rc); + break; + } + } + + /* If we are not waiting for responses on async requests, return. */ + if (rc || list_empty(&rqset->set_requests)) { + int err = lov_fini_sync_set(set); + + RETURN(rc ?: err); + } + + LASSERT(rqset->set_interpret == NULL); + rqset->set_interpret = lov_sync_interpret; + rqset->set_arg = (void *)set; + + RETURN(0); +} + +static int lov_brw_check(struct lov_obd *lov, struct obd_info *lov_oinfo, + obd_count oa_bufs, struct brw_page *pga) +{ + struct obd_info oinfo = { { { 0 } } }; + int i, rc = 0; + + oinfo.oi_oa = lov_oinfo->oi_oa; + + /* The caller just wants to know if there's a chance that this + * I/O can succeed */ + for (i = 0; i < oa_bufs; i++) { + int stripe = lov_stripe_number(lov_oinfo->oi_md, pga[i].off); + int ost = lov_oinfo->oi_md->lsm_oinfo[stripe]->loi_ost_idx; + obd_off start, end; + + if (!lov_stripe_intersects(lov_oinfo->oi_md, i, pga[i].off, + pga[i].off + pga[i].count - 1, + &start, &end)) + continue; + + if (!lov->lov_tgts[ost] || !lov->lov_tgts[ost]->ltd_active) { + CDEBUG(D_HA, "lov idx %d inactive\n", ost); + return -EIO; + } + + rc = obd_brw(OBD_BRW_CHECK, lov->lov_tgts[ost]->ltd_exp, &oinfo, + 1, &pga[i], NULL); + if (rc) + break; + } + return rc; +} + +static int lov_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo, + obd_count oa_bufs, struct brw_page *pga, + struct obd_trans_info *oti) +{ + struct lov_request_set *set; + struct lov_request *req; + struct list_head *pos; + struct lov_obd *lov = &exp->exp_obd->u.lov; + int err, rc = 0; + ENTRY; + + ASSERT_LSM_MAGIC(oinfo->oi_md); + + if (cmd == OBD_BRW_CHECK) { + rc = lov_brw_check(lov, oinfo, oa_bufs, pga); + RETURN(rc); + } + + rc = lov_prep_brw_set(exp, oinfo, oa_bufs, pga, oti, &set); + if (rc) + RETURN(rc); + + list_for_each (pos, &set->set_list) { + struct obd_export *sub_exp; + struct brw_page *sub_pga; + req = list_entry(pos, struct lov_request, rq_link); + + sub_exp = lov->lov_tgts[req->rq_idx]->ltd_exp; + sub_pga = set->set_pga + req->rq_pgaidx; + rc = obd_brw(cmd, sub_exp, &req->rq_oi, req->rq_oabufs, + sub_pga, oti); + if (rc) + break; + lov_update_common_set(set, req, rc); + } + + err = lov_fini_brw_set(set); + if (!rc) + rc = err; + RETURN(rc); +} + +static int lov_enqueue_interpret(struct ptlrpc_request_set *rqset, + void *data, int rc) +{ + struct lov_request_set *lovset = (struct lov_request_set *)data; + ENTRY; + rc = lov_fini_enqueue_set(lovset, lovset->set_ei->ei_mode, rc, rqset); + RETURN(rc); +} + +static int lov_enqueue(struct obd_export *exp, struct obd_info *oinfo, + struct ldlm_enqueue_info *einfo, + struct ptlrpc_request_set *rqset) +{ + ldlm_mode_t mode = einfo->ei_mode; + struct lov_request_set *set; + struct lov_request *req; + struct list_head *pos; + struct lov_obd *lov; + ldlm_error_t rc; + ENTRY; + + LASSERT(oinfo); + ASSERT_LSM_MAGIC(oinfo->oi_md); + LASSERT(mode == (mode & -mode)); + + /* we should never be asked to replay a lock this way. */ + LASSERT((oinfo->oi_flags & LDLM_FL_REPLAY) == 0); + + if (!exp || !exp->exp_obd) + RETURN(-ENODEV); + + lov = &exp->exp_obd->u.lov; + rc = lov_prep_enqueue_set(exp, oinfo, einfo, &set); + if (rc) + RETURN(rc); + + list_for_each (pos, &set->set_list) { + req = list_entry(pos, struct lov_request, rq_link); + + rc = obd_enqueue(lov->lov_tgts[req->rq_idx]->ltd_exp, + &req->rq_oi, einfo, rqset); + if (rc != ELDLM_OK) + GOTO(out, rc); + } + + if (rqset && !list_empty(&rqset->set_requests)) { + LASSERT(rc == 0); + LASSERT(rqset->set_interpret == NULL); + rqset->set_interpret = lov_enqueue_interpret; + rqset->set_arg = (void *)set; + RETURN(rc); + } +out: + rc = lov_fini_enqueue_set(set, mode, rc, rqset); + RETURN(rc); +} + +static int lov_change_cbdata(struct obd_export *exp, + struct lov_stripe_md *lsm, ldlm_iterator_t it, + void *data) +{ + struct lov_obd *lov; + int rc = 0, i; + ENTRY; + + ASSERT_LSM_MAGIC(lsm); + + if (!exp || !exp->exp_obd) + RETURN(-ENODEV); + + lov = &exp->exp_obd->u.lov; + for (i = 0; i < lsm->lsm_stripe_count; i++) { + struct lov_stripe_md submd; + struct lov_oinfo *loi = lsm->lsm_oinfo[i]; + + if (!lov->lov_tgts[loi->loi_ost_idx]) { + CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx); + continue; + } + + submd.lsm_oi = loi->loi_oi; + submd.lsm_stripe_count = 0; + rc = obd_change_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp, + &submd, it, data); + } + RETURN(rc); +} + +/* find any ldlm lock of the inode in lov + * return 0 not find + * 1 find one + * < 0 error */ +static int lov_find_cbdata(struct obd_export *exp, + struct lov_stripe_md *lsm, ldlm_iterator_t it, + void *data) +{ + struct lov_obd *lov; + int rc = 0, i; + ENTRY; + + ASSERT_LSM_MAGIC(lsm); + + if (!exp || !exp->exp_obd) + RETURN(-ENODEV); + + lov = &exp->exp_obd->u.lov; + for (i = 0; i < lsm->lsm_stripe_count; i++) { + struct lov_stripe_md submd; + struct lov_oinfo *loi = lsm->lsm_oinfo[i]; + + if (!lov->lov_tgts[loi->loi_ost_idx]) { + CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx); + continue; + } + submd.lsm_oi = loi->loi_oi; + submd.lsm_stripe_count = 0; + rc = obd_find_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp, + &submd, it, data); + if (rc != 0) + RETURN(rc); + } + RETURN(rc); +} + +static int lov_cancel(struct obd_export *exp, struct lov_stripe_md *lsm, + __u32 mode, struct lustre_handle *lockh) +{ + struct lov_request_set *set; + struct obd_info oinfo; + struct lov_request *req; + struct list_head *pos; + struct lov_obd *lov; + struct lustre_handle *lov_lockhp; + int err = 0, rc = 0; + ENTRY; + + ASSERT_LSM_MAGIC(lsm); + + if (!exp || !exp->exp_obd) + RETURN(-ENODEV); + + LASSERT(lockh); + lov = &exp->exp_obd->u.lov; + rc = lov_prep_cancel_set(exp, &oinfo, lsm, mode, lockh, &set); + if (rc) + RETURN(rc); + + list_for_each(pos, &set->set_list) { + req = list_entry(pos, struct lov_request, rq_link); + lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe; + + rc = obd_cancel(lov->lov_tgts[req->rq_idx]->ltd_exp, + req->rq_oi.oi_md, mode, lov_lockhp); + rc = lov_update_common_set(set, req, rc); + if (rc) { + CERROR("%s: cancel objid "DOSTID" subobj " + DOSTID" on OST idx %d: rc = %d\n", + exp->exp_obd->obd_name, POSTID(&lsm->lsm_oi), + POSTID(&req->rq_oi.oi_md->lsm_oi), + req->rq_idx, rc); + err = rc; + } + + } + lov_fini_cancel_set(set); + RETURN(err); +} + +static int lov_cancel_unused(struct obd_export *exp, + struct lov_stripe_md *lsm, + ldlm_cancel_flags_t flags, void *opaque) +{ + struct lov_obd *lov; + int rc = 0, i; + ENTRY; + + if (!exp || !exp->exp_obd) + RETURN(-ENODEV); + + lov = &exp->exp_obd->u.lov; + if (lsm == NULL) { + for (i = 0; i < lov->desc.ld_tgt_count; i++) { + int err; + if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp) + continue; + + err = obd_cancel_unused(lov->lov_tgts[i]->ltd_exp, NULL, + flags, opaque); + if (!rc) + rc = err; + } + RETURN(rc); + } + + ASSERT_LSM_MAGIC(lsm); + + for (i = 0; i < lsm->lsm_stripe_count; i++) { + struct lov_stripe_md submd; + struct lov_oinfo *loi = lsm->lsm_oinfo[i]; + int idx = loi->loi_ost_idx; + int err; + + if (!lov->lov_tgts[idx]) { + CDEBUG(D_HA, "lov idx %d NULL\n", idx); + continue; + } + + if (!lov->lov_tgts[idx]->ltd_active) + CDEBUG(D_HA, "lov idx %d inactive\n", idx); + + submd.lsm_oi = loi->loi_oi; + submd.lsm_stripe_count = 0; + err = obd_cancel_unused(lov->lov_tgts[idx]->ltd_exp, + &submd, flags, opaque); + if (err && lov->lov_tgts[idx]->ltd_active) { + CERROR("%s: cancel unused objid "DOSTID + " subobj "DOSTID" on OST idx %d: rc = %d\n", + exp->exp_obd->obd_name, POSTID(&lsm->lsm_oi), + POSTID(&loi->loi_oi), idx, err); + if (!rc) + rc = err; + } + } + RETURN(rc); +} + +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; + ENTRY; + + 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 list_head *pos; + struct lov_obd *lov; + int rc = 0; + ENTRY; + + LASSERT(oinfo != NULL); + LASSERT(oinfo->oi_osfs != NULL); + + lov = &obd->u.lov; + rc = lov_prep_statfs_set(obd, oinfo, &set); + if (rc) + RETURN(rc); + + list_for_each (pos, &set->set_list) { + req = list_entry(pos, struct lov_request, 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 == NULL); + 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 = { { { 0 } } }; + int rc = 0; + ENTRY; + + + /* for obdclass we forbid using obd_statfs_rqset, but prefer using async + * statfs requests */ + set = ptlrpc_prep_set(); + if (set == NULL) + RETURN(-ENOMEM); + + oinfo.oi_osfs = osfs; + oinfo.oi_flags = flags; + 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 *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; + ENTRY; + + 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((int) data->ioc_plen2, + (int) sizeof(struct obd_uuid)))) + RETURN(-EFAULT); + + flags = uarg ? *(__u32*)uarg : 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((int) data->ioc_plen1, + (int) 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, (void *)uarg)) + RETURN(-EINVAL); + + data = (struct obd_ioctl_data *)buf; + + if (sizeof(*desc) > data->ioc_inllen1) { + obd_ioctl_freedata(buf, len); + RETURN(-EINVAL); + } + + if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) { + obd_ioctl_freedata(buf, len); + RETURN(-EINVAL); + } + + if (sizeof(__u32) * count > data->ioc_inllen3) { + obd_ioctl_freedata(buf, len); + 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((void *)uarg, buf, len)) + rc = -EFAULT; + obd_ioctl_freedata(buf, len); + break; + } + case LL_IOC_LOV_SETSTRIPE: + rc = lov_setstripe(exp, len, karg, uarg); + break; + case LL_IOC_LOV_GETSTRIPE: + rc = lov_getstripe(exp, karg, uarg); + break; + case LL_IOC_LOV_SETEA: + rc = lov_setea(exp, karg, uarg); + 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 (qctl->qc_idx < 0 || 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 == NULL) + RETURN(-EINVAL); + + break; + } + } else { + RETURN(-EINVAL); + } + + if (i >= count) + RETURN(-EAGAIN); + + LASSERT(tgt && tgt->ltd_exp); + OBD_ALLOC_PTR(oqctl); + 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; + } + OBD_FREE_PTR(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 == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) { + RETURN(err); + } else 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); +} + +#define FIEMAP_BUFFER_SIZE 4096 + +/** + * Non-zero fe_logical indicates that this is a continuation FIEMAP + * call. The local end offset and the device are sent in the first + * fm_extent. This function calculates the stripe number from the index. + * This function returns a stripe_no on which mapping is to be restarted. + * + * This function returns fm_end_offset which is the in-OST offset at which + * mapping should be restarted. If fm_end_offset=0 is returned then caller + * will re-calculate proper offset in next stripe. + * Note that the first extent is passed to lov_get_info via the value field. + * + * \param fiemap fiemap request header + * \param lsm striping information for the file + * \param fm_start logical start of mapping + * \param fm_end logical end of mapping + * \param start_stripe starting stripe will be returned in this + */ +obd_size fiemap_calc_fm_end_offset(struct ll_user_fiemap *fiemap, + struct lov_stripe_md *lsm, obd_size fm_start, + obd_size fm_end, int *start_stripe) +{ + obd_size local_end = fiemap->fm_extents[0].fe_logical; + obd_off lun_start, lun_end; + obd_size fm_end_offset; + int stripe_no = -1, i; + + if (fiemap->fm_extent_count == 0 || + fiemap->fm_extents[0].fe_logical == 0) + return 0; + + /* Find out stripe_no from ost_index saved in the fe_device */ + for (i = 0; i < lsm->lsm_stripe_count; i++) { + if (lsm->lsm_oinfo[i]->loi_ost_idx == + fiemap->fm_extents[0].fe_device) { + stripe_no = i; + break; + } + } + if (stripe_no == -1) + return -EINVAL; + + /* If we have finished mapping on previous device, shift logical + * offset to start of next device */ + if ((lov_stripe_intersects(lsm, stripe_no, fm_start, fm_end, + &lun_start, &lun_end)) != 0 && + local_end < lun_end) { + fm_end_offset = local_end; + *start_stripe = stripe_no; + } else { + /* This is a special value to indicate that caller should + * calculate offset in next stripe. */ + fm_end_offset = 0; + *start_stripe = (stripe_no + 1) % lsm->lsm_stripe_count; + } + + return fm_end_offset; +} + +/** + * We calculate on which OST the mapping will end. If the length of mapping + * is greater than (stripe_size * stripe_count) then the last_stripe will + * will be one just before start_stripe. Else we check if the mapping + * intersects each OST and find last_stripe. + * This function returns the last_stripe and also sets the stripe_count + * over which the mapping is spread + * + * \param lsm striping information for the file + * \param fm_start logical start of mapping + * \param fm_end logical end of mapping + * \param start_stripe starting stripe of the mapping + * \param stripe_count the number of stripes across which to map is returned + * + * \retval last_stripe return the last stripe of the mapping + */ +int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, obd_size fm_start, + obd_size fm_end, int start_stripe, + int *stripe_count) +{ + int last_stripe; + obd_off obd_start, obd_end; + int i, j; + + if (fm_end - fm_start > lsm->lsm_stripe_size * lsm->lsm_stripe_count) { + last_stripe = (start_stripe < 1 ? lsm->lsm_stripe_count - 1 : + start_stripe - 1); + *stripe_count = lsm->lsm_stripe_count; + } else { + for (j = 0, i = start_stripe; j < lsm->lsm_stripe_count; + i = (i + 1) % lsm->lsm_stripe_count, j++) { + if ((lov_stripe_intersects(lsm, i, fm_start, fm_end, + &obd_start, &obd_end)) == 0) + break; + } + *stripe_count = j; + last_stripe = (start_stripe + j - 1) %lsm->lsm_stripe_count; + } + + return last_stripe; +} + +/** + * Set fe_device and copy extents from local buffer into main return buffer. + * + * \param fiemap fiemap request header + * \param lcl_fm_ext array of local fiemap extents to be copied + * \param ost_index OST index to be written into the fm_device field for each + extent + * \param ext_count number of extents to be copied + * \param current_extent where to start copying in main extent array + */ +void fiemap_prepare_and_copy_exts(struct ll_user_fiemap *fiemap, + struct ll_fiemap_extent *lcl_fm_ext, + int ost_index, unsigned int ext_count, + int current_extent) +{ + char *to; + int ext; + + for (ext = 0; ext < ext_count; ext++) { + lcl_fm_ext[ext].fe_device = ost_index; + lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET; + } + + /* Copy fm_extent's from fm_local to return buffer */ + to = (char *)fiemap + fiemap_count_to_size(current_extent); + memcpy(to, lcl_fm_ext, ext_count * sizeof(struct ll_fiemap_extent)); +} + +/** + * Break down the FIEMAP request and send appropriate calls to individual OSTs. + * This also handles the restarting of FIEMAP calls in case mapping overflows + * the available number of extents in single call. + */ +static int lov_fiemap(struct lov_obd *lov, __u32 keylen, void *key, + __u32 *vallen, void *val, struct lov_stripe_md *lsm) +{ + struct ll_fiemap_info_key *fm_key = key; + struct ll_user_fiemap *fiemap = val; + struct ll_user_fiemap *fm_local = NULL; + struct ll_fiemap_extent *lcl_fm_ext; + int count_local; + unsigned int get_num_extents = 0; + int ost_index = 0, actual_start_stripe, start_stripe; + obd_size fm_start, fm_end, fm_length, fm_end_offset; + obd_size curr_loc; + int current_extent = 0, rc = 0, i; + int ost_eof = 0; /* EOF for object */ + int ost_done = 0; /* done with required mapping for this OST? */ + int last_stripe; + int cur_stripe = 0, cur_stripe_wrap = 0, stripe_count; + unsigned int buffer_size = FIEMAP_BUFFER_SIZE; + + if (lsm == NULL) + GOTO(out, rc = 0); + + if (fiemap_count_to_size(fm_key->fiemap.fm_extent_count) < buffer_size) + buffer_size = fiemap_count_to_size(fm_key->fiemap.fm_extent_count); + + OBD_ALLOC_LARGE(fm_local, buffer_size); + if (fm_local == NULL) + GOTO(out, rc = -ENOMEM); + lcl_fm_ext = &fm_local->fm_extents[0]; + + count_local = fiemap_size_to_count(buffer_size); + + memcpy(fiemap, &fm_key->fiemap, sizeof(*fiemap)); + fm_start = fiemap->fm_start; + fm_length = fiemap->fm_length; + /* Calculate start stripe, last stripe and length of mapping */ + actual_start_stripe = start_stripe = lov_stripe_number(lsm, fm_start); + fm_end = (fm_length == ~0ULL ? fm_key->oa.o_size : + fm_start + fm_length - 1); + /* If fm_length != ~0ULL but fm_start+fm_length-1 exceeds file size */ + if (fm_end > fm_key->oa.o_size) + fm_end = fm_key->oa.o_size; + + last_stripe = fiemap_calc_last_stripe(lsm, fm_start, fm_end, + actual_start_stripe, &stripe_count); + + fm_end_offset = fiemap_calc_fm_end_offset(fiemap, lsm, fm_start, + fm_end, &start_stripe); + if (fm_end_offset == -EINVAL) + GOTO(out, rc = -EINVAL); + + if (fiemap->fm_extent_count == 0) { + get_num_extents = 1; + count_local = 0; + } + + /* Check each stripe */ + for (cur_stripe = start_stripe, i = 0; i < stripe_count; + i++, cur_stripe = (cur_stripe + 1) % lsm->lsm_stripe_count) { + obd_size req_fm_len; /* Stores length of required mapping */ + obd_size len_mapped_single_call; + obd_off lun_start, lun_end, obd_object_end; + unsigned int ext_count; + + cur_stripe_wrap = cur_stripe; + + /* Find out range of mapping on this stripe */ + if ((lov_stripe_intersects(lsm, cur_stripe, fm_start, fm_end, + &lun_start, &obd_object_end)) == 0) + continue; + + /* If this is a continuation FIEMAP call and we are on + * starting stripe then lun_start needs to be set to + * fm_end_offset */ + if (fm_end_offset != 0 && cur_stripe == start_stripe) + lun_start = fm_end_offset; + + if (fm_length != ~0ULL) { + /* Handle fm_start + fm_length overflow */ + if (fm_start + fm_length < fm_start) + fm_length = ~0ULL - fm_start; + lun_end = lov_size_to_stripe(lsm, fm_start + fm_length, + cur_stripe); + } else { + lun_end = ~0ULL; + } + + if (lun_start == lun_end) + continue; + + req_fm_len = obd_object_end - lun_start; + fm_local->fm_length = 0; + len_mapped_single_call = 0; + + /* If the output buffer is very large and the objects have many + * extents we may need to loop on a single OST repeatedly */ + ost_eof = 0; + ost_done = 0; + do { + if (get_num_extents == 0) { + /* Don't get too many extents. */ + if (current_extent + count_local > + fiemap->fm_extent_count) + count_local = fiemap->fm_extent_count - + current_extent; + } + + lun_start += len_mapped_single_call; + fm_local->fm_length = req_fm_len - len_mapped_single_call; + req_fm_len = fm_local->fm_length; + fm_local->fm_extent_count = count_local; + fm_local->fm_mapped_extents = 0; + fm_local->fm_flags = fiemap->fm_flags; + + fm_key->oa.o_oi = lsm->lsm_oinfo[cur_stripe]->loi_oi; + ost_index = lsm->lsm_oinfo[cur_stripe]->loi_ost_idx; + + if (ost_index < 0 || ost_index >=lov->desc.ld_tgt_count) + GOTO(out, rc = -EINVAL); + + /* If OST is inactive, return extent with UNKNOWN flag */ + if (!lov->lov_tgts[ost_index]->ltd_active) { + fm_local->fm_flags |= FIEMAP_EXTENT_LAST; + fm_local->fm_mapped_extents = 1; + + lcl_fm_ext[0].fe_logical = lun_start; + lcl_fm_ext[0].fe_length = obd_object_end - + lun_start; + lcl_fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN; + + goto inactive_tgt; + } + + fm_local->fm_start = lun_start; + fm_local->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER; + memcpy(&fm_key->fiemap, fm_local, sizeof(*fm_local)); + *vallen=fiemap_count_to_size(fm_local->fm_extent_count); + rc = obd_get_info(NULL, + lov->lov_tgts[ost_index]->ltd_exp, + keylen, key, vallen, fm_local, lsm); + if (rc != 0) + GOTO(out, rc); + +inactive_tgt: + ext_count = fm_local->fm_mapped_extents; + if (ext_count == 0) { + ost_done = 1; + /* If last stripe has hole at the end, + * then we need to return */ + if (cur_stripe_wrap == last_stripe) { + fiemap->fm_mapped_extents = 0; + goto finish; + } + break; + } + + /* If we just need num of extents then go to next device */ + if (get_num_extents) { + current_extent += ext_count; + break; + } + + len_mapped_single_call = lcl_fm_ext[ext_count-1].fe_logical - + lun_start + lcl_fm_ext[ext_count - 1].fe_length; + + /* Have we finished mapping on this device? */ + if (req_fm_len <= len_mapped_single_call) + ost_done = 1; + + /* Clear the EXTENT_LAST flag which can be present on + * last extent */ + if (lcl_fm_ext[ext_count-1].fe_flags & FIEMAP_EXTENT_LAST) + lcl_fm_ext[ext_count - 1].fe_flags &= + ~FIEMAP_EXTENT_LAST; + + curr_loc = lov_stripe_size(lsm, + lcl_fm_ext[ext_count - 1].fe_logical+ + lcl_fm_ext[ext_count - 1].fe_length, + cur_stripe); + if (curr_loc >= fm_key->oa.o_size) + ost_eof = 1; + + fiemap_prepare_and_copy_exts(fiemap, lcl_fm_ext, + ost_index, ext_count, + current_extent); + + current_extent += ext_count; + + /* Ran out of available extents? */ + if (current_extent >= fiemap->fm_extent_count) + goto finish; + } while (ost_done == 0 && ost_eof == 0); + + if (cur_stripe_wrap == last_stripe) + goto finish; + } + +finish: + /* Indicate that we are returning device offsets unless file just has + * single stripe */ + if (lsm->lsm_stripe_count > 1) + fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER; + + if (get_num_extents) + goto skip_last_device_calc; + + /* Check if we have reached the last stripe and whether mapping for that + * stripe is done. */ + if (cur_stripe_wrap == last_stripe) { + if (ost_done || ost_eof) + fiemap->fm_extents[current_extent - 1].fe_flags |= + FIEMAP_EXTENT_LAST; + } + +skip_last_device_calc: + fiemap->fm_mapped_extents = current_extent; + +out: + OBD_FREE_LARGE(fm_local, buffer_size); + 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 lov_stripe_md *lsm) +{ + struct obd_device *obddev = class_exp2obd(exp); + struct lov_obd *lov = &obddev->u.lov; + int i, rc; + ENTRY; + + if (!vallen || !val) + RETURN(-EFAULT); + + obd_getref(obddev); + + if (KEY_IS(KEY_LOCK_TO_STRIPE)) { + struct { + char name[16]; + struct ldlm_lock *lock; + } *data = key; + struct ldlm_res_id *res_id = &data->lock->l_resource->lr_name; + struct lov_oinfo *loi; + __u32 *stripe = val; + + if (*vallen < sizeof(*stripe)) + GOTO(out, rc = -EFAULT); + *vallen = sizeof(*stripe); + + /* XXX This is another one of those bits that will need to + * change if we ever actually support nested LOVs. It uses + * the lock's export to find out which stripe it is. */ + /* XXX - it's assumed all the locks for deleted OSTs have + * been cancelled. Also, the export for deleted OSTs will + * be NULL and won't match the lock's export. */ + for (i = 0; i < lsm->lsm_stripe_count; i++) { + loi = lsm->lsm_oinfo[i]; + if (!lov->lov_tgts[loi->loi_ost_idx]) + continue; + if (lov->lov_tgts[loi->loi_ost_idx]->ltd_exp == + data->lock->l_conn_export && + ostid_res_name_eq(&loi->loi_oi, res_id)) { + *stripe = i; + GOTO(out, rc = 0); + } + } + LDLM_ERROR(data->lock, "lock on inode without such object"); + dump_lsm(D_ERROR, lsm); + GOTO(out, rc = -ENXIO); + } else if (KEY_IS(KEY_LAST_ID)) { + struct obd_id_info *info = val; + __u32 size = sizeof(obd_id); + struct lov_tgt_desc *tgt; + + LASSERT(*vallen == sizeof(struct obd_id_info)); + tgt = lov->lov_tgts[info->idx]; + + if (!tgt || !tgt->ltd_active) + GOTO(out, rc = -ESRCH); + + rc = obd_get_info(env, tgt->ltd_exp, keylen, key, + &size, info->data, NULL); + GOTO(out, rc = 0); + } else if (KEY_IS(KEY_LOVDESC)) { + struct lov_desc *desc_ret = val; + *desc_ret = lov->desc; + + GOTO(out, rc = 0); + } else if (KEY_IS(KEY_FIEMAP)) { + rc = lov_fiemap(lov, keylen, key, vallen, val, lsm); + GOTO(out, rc); + } else if (KEY_IS(KEY_CONNECT_FLAG)) { + struct lov_tgt_desc *tgt; + __u64 ost_idx = *((__u64*)val); + + LASSERT(*vallen == sizeof(__u64)); + LASSERT(ost_idx < lov->desc.ld_tgt_count); + tgt = lov->lov_tgts[ost_idx]; + + if (!tgt || !tgt->ltd_exp) + GOTO(out, rc = -ESRCH); + + *((__u64 *)val) = exp_connect_flags(tgt->ltd_exp); + GOTO(out, rc = 0); + } else if (KEY_IS(KEY_TGT_COUNT)) { + *((int *)val) = lov->desc.ld_tgt_count; + GOTO(out, rc = 0); + } + + rc = -EINVAL; + +out: + obd_putref(obddev); + RETURN(rc); +} + +static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp, + obd_count keylen, void *key, obd_count vallen, + void *val, struct ptlrpc_request_set *set) +{ + struct obd_device *obddev = class_exp2obd(exp); + struct lov_obd *lov = &obddev->u.lov; + obd_count count; + int i, rc = 0, err; + struct lov_tgt_desc *tgt; + unsigned incr, check_uuid, + do_inactive, no_set; + unsigned next_id = 0, mds_con = 0, capa = 0; + ENTRY; + + incr = check_uuid = do_inactive = no_set = 0; + if (set == NULL) { + no_set = 1; + set = ptlrpc_prep_set(); + if (!set) + RETURN(-ENOMEM); + } + + obd_getref(obddev); + count = lov->desc.ld_tgt_count; + + if (KEY_IS(KEY_NEXT_ID)) { + count = vallen / sizeof(struct obd_id_info); + vallen = sizeof(obd_id); + incr = sizeof(struct obd_id_info); + do_inactive = 1; + next_id = 1; + } else if (KEY_IS(KEY_CHECKSUM)) { + do_inactive = 1; + } else if (KEY_IS(KEY_EVICT_BY_NID)) { + /* use defaults: do_inactive = incr = 0; */ + } else if (KEY_IS(KEY_MDS_CONN)) { + mds_con = 1; + } else if (KEY_IS(KEY_CAPA_KEY)) { + capa = 1; + } else if (KEY_IS(KEY_CACHE_SET)) { + LASSERT(lov->lov_cache == NULL); + lov->lov_cache = val; + do_inactive = 1; + } + + for (i = 0; i < count; i++, val = (char *)val + incr) { + if (next_id) { + tgt = lov->lov_tgts[((struct obd_id_info*)val)->idx]; + } else { + 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; + + if (mds_con) { + struct mds_group_info *mgi; + + LASSERT(vallen == sizeof(*mgi)); + mgi = (struct mds_group_info *)val; + + /* Only want a specific OSC */ + if (mgi->uuid && !obd_uuid_equals(mgi->uuid, + &tgt->ltd_uuid)) + continue; + + err = obd_set_info_async(env, tgt->ltd_exp, + keylen, key, sizeof(int), + &mgi->group, set); + } else if (next_id) { + err = obd_set_info_async(env, tgt->ltd_exp, + keylen, key, vallen, + ((struct obd_id_info*)val)->data, set); + } else if (capa) { + struct mds_capa_info *info = (struct mds_capa_info*)val; + + LASSERT(vallen == sizeof(*info)); + + /* Only want a specific OSC */ + if (info->uuid && + !obd_uuid_equals(info->uuid, &tgt->ltd_uuid)) + continue; + + err = obd_set_info_async(env, tgt->ltd_exp, keylen, + key, sizeof(*info->capa), + info->capa, set); + } else { + /* Only want a specific OSC */ + if (check_uuid && + !obd_uuid_equals(val, &tgt->ltd_uuid)) + 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); +} + +static int lov_extent_calc(struct obd_export *exp, struct lov_stripe_md *lsm, + int cmd, __u64 *offset) +{ + __u32 ssize = lsm->lsm_stripe_size; + __u64 start; + + start = *offset; + lov_do_div64(start, ssize); + start = start * ssize; + + CDEBUG(D_DLMTRACE, "offset "LPU64", stripe %u, start "LPU64 + ", end "LPU64"\n", *offset, ssize, start, + start + ssize - 1); + if (cmd == OBD_CALC_STRIPE_END) { + *offset = start + ssize - 1; + } else if (cmd == OBD_CALC_STRIPE_START) { + *offset = start; + } else { + LBUG(); + } + + RETURN(0); +} + +void lov_stripe_lock(struct lov_stripe_md *md) +{ + LASSERT(md->lsm_lock_owner != current_pid()); + spin_lock(&md->lsm_lock); + LASSERT(md->lsm_lock_owner == 0); + md->lsm_lock_owner = current_pid(); +} +EXPORT_SYMBOL(lov_stripe_lock); + +void lov_stripe_unlock(struct lov_stripe_md *md) +{ + LASSERT(md->lsm_lock_owner == current_pid()); + md->lsm_lock_owner = 0; + spin_unlock(&md->lsm_lock); +} +EXPORT_SYMBOL(lov_stripe_unlock); + +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; + ENTRY; + + if (oqctl->qc_cmd != LUSTRE_Q_QUOTAON && + oqctl->qc_cmd != LUSTRE_Q_QUOTAOFF && + oqctl->qc_cmd != Q_GETOQUOTA && + oqctl->qc_cmd != Q_INITQUOTA && + oqctl->qc_cmd != LUSTRE_Q_SETQUOTA && + oqctl->qc_cmd != Q_FINVALIDATE) { + CERROR("bad quota opc %x for lov obd", 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 int lov_quotacheck(struct obd_device *obd, struct obd_export *exp, + struct obd_quotactl *oqctl) +{ + struct lov_obd *lov = &obd->u.lov; + int i, rc = 0; + ENTRY; + + obd_getref(obd); + + for (i = 0; i < lov->desc.ld_tgt_count; i++) { + if (!lov->lov_tgts[i]) + continue; + + /* Skip quota check on the administratively disabled OSTs. */ + if (!lov->lov_tgts[i]->ltd_activate) { + CWARN("lov idx %d was administratively disabled, " + "skip quotacheck on it.\n", i); + continue; + } + + if (!lov->lov_tgts[i]->ltd_active) { + CERROR("lov idx %d inactive\n", i); + rc = -EIO; + goto out; + } + } + + for (i = 0; i < lov->desc.ld_tgt_count; i++) { + int err; + + if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_activate) + continue; + + err = obd_quotacheck(lov->lov_tgts[i]->ltd_exp, oqctl); + if (err && !rc) + rc = err; + } + +out: + obd_putref(obd); + + RETURN(rc); +} + +struct obd_ops lov_obd_ops = { + .o_owner = THIS_MODULE, + .o_setup = lov_setup, + .o_precleanup = lov_precleanup, + .o_cleanup = lov_cleanup, + //.o_process_config = lov_process_config, + .o_connect = lov_connect, + .o_disconnect = lov_disconnect, + .o_statfs = lov_statfs, + .o_statfs_async = lov_statfs_async, + .o_packmd = lov_packmd, + .o_unpackmd = lov_unpackmd, + .o_create = lov_create, + .o_destroy = lov_destroy, + .o_getattr = lov_getattr, + .o_getattr_async = lov_getattr_async, + .o_setattr = lov_setattr, + .o_setattr_async = lov_setattr_async, + .o_brw = lov_brw, + .o_merge_lvb = lov_merge_lvb, + .o_adjust_kms = lov_adjust_kms, + .o_punch = lov_punch, + .o_sync = lov_sync, + .o_enqueue = lov_enqueue, + .o_change_cbdata = lov_change_cbdata, + .o_find_cbdata = lov_find_cbdata, + .o_cancel = lov_cancel, + .o_cancel_unused = lov_cancel_unused, + .o_iocontrol = lov_iocontrol, + .o_get_info = lov_get_info, + .o_set_info_async = lov_set_info_async, + .o_extent_calc = lov_extent_calc, + .o_llog_init = lov_llog_init, + .o_llog_finish = lov_llog_finish, + .o_notify = lov_notify, + .o_pool_new = lov_pool_new, + .o_pool_rem = lov_pool_remove, + .o_pool_add = lov_pool_add, + .o_pool_del = lov_pool_del, + .o_getref = lov_getref, + .o_putref = lov_putref, + .o_quotactl = lov_quotactl, + .o_quotacheck = lov_quotacheck, +}; + +struct kmem_cache *lov_oinfo_slab; + +extern struct lu_kmem_descr lov_caches[]; + +int __init lov_init(void) +{ + struct lprocfs_static_vars lvars = { 0 }; + int rc; + ENTRY; + + /* 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 == NULL) { + lu_kmem_fini(lov_caches); + return -ENOMEM; + } + lprocfs_lov_init_vars(&lvars); + + rc = class_register_type(&lov_obd_ops, NULL, lvars.module_vars, + 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("Sun Microsystems, Inc. <http://www.lustre.org/>"); +MODULE_DESCRIPTION("Lustre Logical Object Volume OBD driver"); +MODULE_LICENSE("GPL"); + +cfs_module(lov, LUSTRE_VERSION_STRING, lov_init, lov_exit); |