--- /dev/null
+/*
+ * 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 "../../include/linux/libcfs/libcfs.h"
+
+#include "../include/obd_support.h"
+#include "../include/lustre_lib.h"
+#include "../include/lustre_net.h"
+#include "../include/lustre/lustre_idl.h"
+#include "../include/lustre_dlm.h"
+#include "../include/lustre_mds.h"
+#include "../include/obd_class.h"
+#include "../include/lprocfs_status.h"
+#include "../include/lustre_param.h"
+#include "../include/cl_object.h"
+#include "../include/lclient.h" /* for cl_client_lru */
+#include "../include/lustre/ll_fiemap.h"
+#include "../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;
+ struct proc_dir_entry *lov_proc_dir;
+ 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");
+
+ lov_proc_dir = obd->obd_proc_private;
+ if (lov_proc_dir) {
+ struct obd_device *osc_obd = lov->lov_tgts[index]->ltd_exp->exp_obd;
+ struct proc_dir_entry *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;
+
+ 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)
+{
+ struct proc_dir_entry *lov_proc_dir;
+ 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) {
+ lov_proc_dir = obd->obd_proc_private;
+ if (lov_proc_dir) {
+ lprocfs_remove_proc_entry(osc_obd->obd_name, lov_proc_dir);
+ }
+ /* 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 == 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 %#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;
+ } 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;
+
+ 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 == 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_t(__u32, lov->lov_tgt_size, 2);
+ while (newsize < index + 1)
+ 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;
+
+ /* connect to administrative disabled ost */
+ if (!tgt->ltd_exp) {
+ rc = 0;
+ goto out;
+ }
+
+ 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 = 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);
+
+ 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_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);
+#if defined (CONFIG_PROC_FS)
+ {
+ int rc1;
+
+ rc1 = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
+ 0444, &lov_proc_target_fops, obd);
+ if (rc1)
+ 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)
+{
+ struct lov_obd *lov = &obd->u.lov;
+
+ 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;
+ }
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static int lov_cleanup(struct obd_device *obd)
+{
+ struct lov_obd *lov = &obd->u.lov;
+ struct list_head *pos, *tmp;
+ struct pool_desc *pool;
+
+ 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, NULL, 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;
+
+ 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));
+
+ if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", indexp) != 1) {
+ rc = -EINVAL;
+ goto out;
+ }
+ if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", genp) != 1) {
+ rc = -EINVAL;
+ 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_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;
+
+ 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) {
+ rc = -EINVAL;
+ goto out;
+ }
+ if (ost_idx >= lov->desc.ld_tgt_count ||
+ !lov->lov_tgts[ost_idx]) {
+ rc = -EINVAL;
+ goto out;
+ }
+
+ for (i = 0; i < lsm->lsm_stripe_count; i++) {
+ struct lov_oinfo *loi = lsm->lsm_oinfo[i];
+
+ if (lov_oinfo_is_dummy(loi))
+ continue;
+
+ if (loi->loi_ost_idx == ost_idx) {
+ if (ostid_id(&loi->loi_oi) != ostid_id(&src_oa->o_oi)) {
+ rc = -EINVAL;
+ goto out;
+ }
+ break;
+ }
+ }
+ if (i == lsm->lsm_stripe_count) {
+ rc = -EINVAL;
+ goto out;
+ }
+
+ 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;
+
+ 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;
+
+ 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;
+
+ 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_interpret(struct ptlrpc_request_set *rqset,
+ void *data, int rc)
+{
+ struct lov_request_set *lovset = (struct lov_request_set *)data;
+ int err;
+
+ /* don't do attribute merge if this async 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;
+
+ 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;
+ }
+ }
+
+ 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_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_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;
+
+ 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;
+}
+
+/* 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;
+
+ 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_oinfo_is_dummy(loi))
+ continue;
+
+ 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;
+}
+
+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 list_head *pos;
+ struct lov_obd *lov;
+ int rc = 0;
+
+ 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;
+
+ /* 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;
+
+ 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_GETSTRIPE:
+ rc = lov_getstripe(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
+ */
+static u64 fiemap_calc_fm_end_offset(struct ll_user_fiemap *fiemap,
+ struct lov_stripe_md *lsm, u64 fm_start,
+ u64 fm_end, int *start_stripe)
+{
+ u64 local_end = fiemap->fm_extents[0].fe_logical;
+ u64 lun_start, lun_end;
+ u64 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++) {
+ struct lov_oinfo *oinfo = lsm->lsm_oinfo[i];
+
+ if (lov_oinfo_is_dummy(oinfo))
+ continue;
+
+ if (oinfo->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
+ */
+static int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, u64 fm_start,
+ u64 fm_end, int start_stripe,
+ int *stripe_count)
+{
+ int last_stripe;
+ u64 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
+ */
+static 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;
+ u64 fm_start, fm_end, fm_length, fm_end_offset;
+ u64 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_has_objects(lsm)) {
+ rc = 0;
+ goto out;
+ }
+
+ 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) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ 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) {
+ rc = -EINVAL;
+ goto out;
+ }
+
+ if (fiemap_count_to_size(fiemap->fm_extent_count) > *vallen)
+ fiemap->fm_extent_count = fiemap_size_to_count(*vallen);
+ 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) {
+ u64 req_fm_len; /* Stores length of required mapping */
+ u64 len_mapped_single_call;
+ u64 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 (lov_oinfo_is_dummy(lsm->lsm_oinfo[cur_stripe])) {
+ rc = -EIO;
+ goto out;
+ }
+
+ /* 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) {
+ rc = -EINVAL;
+ goto out;
+ }
+
+ /* 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;
+
+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;
+
+ 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)) {
+ rc = -EFAULT;
+ goto out;
+ }
+ *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_oinfo_is_dummy(loi))
+ continue;
+
+ 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;
+ rc = 0;
+ goto out;
+ }
+ }
+ LDLM_ERROR(data->lock, "lock on inode without such object");
+ dump_lsm(D_ERROR, lsm);
+ rc = -ENXIO;
+ goto out;
+ } else if (KEY_IS(KEY_LAST_ID)) {
+ struct obd_id_info *info = val;
+ __u32 size = sizeof(u64);
+ struct lov_tgt_desc *tgt;
+
+ LASSERT(*vallen == sizeof(struct obd_id_info));
+ tgt = lov->lov_tgts[info->idx];
+
+ if (!tgt || !tgt->ltd_active) {
+ rc = -ESRCH;
+ goto out;
+ }
+
+ rc = obd_get_info(env, tgt->ltd_exp, keylen, key,
+ &size, info->data, NULL);
+ rc = 0;
+ goto out;
+ } else if (KEY_IS(KEY_LOVDESC)) {
+ struct lov_desc *desc_ret = val;
+ *desc_ret = lov->desc;
+
+ rc = 0;
+ goto out;
+ } else if (KEY_IS(KEY_FIEMAP)) {
+ rc = lov_fiemap(lov, keylen, key, vallen, val, lsm);
+ goto out;
+ } 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) {
+ rc = -ESRCH;
+ goto out;
+ }
+
+ *((__u64 *)val) = exp_connect_flags(tgt->ltd_exp);
+ rc = 0;
+ goto out;
+ } else if (KEY_IS(KEY_TGT_COUNT)) {
+ *((int *)val) = lov->desc.ld_tgt_count;
+ rc = 0;
+ goto out;
+ }
+
+ rc = -EINVAL;
+
+out:
+ 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;
+ unsigned incr, check_uuid,
+ do_inactive, no_set;
+ unsigned next_id = 0, mds_con = 0, capa = 0;
+
+ 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(u64);
+ 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;
+}
+
+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();
+}
+EXPORT_SYMBOL(lov_stripe_lock);
+
+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);
+}
+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;
+
+ 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;
+
+ 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;
+}
+
+static 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_async = lov_getattr_async,
+ .o_setattr_async = lov_setattr_async,
+ .o_adjust_kms = lov_adjust_kms,
+ .o_find_cbdata = lov_find_cbdata,
+ .o_iocontrol = lov_iocontrol,
+ .o_get_info = lov_get_info,
+ .o_set_info_async = lov_set_info_async,
+ .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;
+
+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 == 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");
+MODULE_VERSION(LUSTRE_VERSION_STRING);
+
+module_init(lov_init);
+module_exit(lov_exit);
Code Review / kvmfornfv.git / blobdiff