/* * 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, 2015, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ * Lustre is a trademark of Sun Microsystems, Inc. * * lustre/lov/lov_obd.c * * Author: Phil Schwan * Author: Peter Braam * Author: Mike Shaver * Author: Nathan Rutman */ #define DEBUG_SUBSYSTEM S_LOV #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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) { struct list_head kill = LIST_HEAD_INIT(kill); struct lov_tgt_desc *tgt, *n; int i; 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); int lov_connect_obd(struct obd_device *obd, __u32 index, int activate, struct obd_connect_data *data) { struct lov_obd *lov = &obd->u.lov; struct obd_uuid *tgt_uuid; struct obd_device *tgt_obd; static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" }; struct obd_import *imp; int rc; ENTRY; if (lov->lov_tgts[index] == NULL) RETURN(-EINVAL); tgt_uuid = &lov->lov_tgts[index]->ltd_uuid; tgt_obd = lov->lov_tgts[index]->ltd_obd; if (!tgt_obd->obd_set_up) { CERROR("Target %s not set up\n", obd_uuid2str(tgt_uuid)); RETURN(-EINVAL); } /* override the sp_me from lov */ tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me; if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX)) data->ocd_index = index; /* * Divine LOV knows that OBDs under it are OSCs. */ imp = tgt_obd->u.cli.cl_import; if (activate) { tgt_obd->obd_no_recov = 0; /* FIXME this is probably supposed to be ptlrpc_set_import_active. Horrible naming. */ ptlrpc_activate_import(imp); } rc = obd_register_observer(tgt_obd, obd); if (rc) { CERROR("Target %s register_observer error %d\n", obd_uuid2str(tgt_uuid), rc); RETURN(rc); } if (imp->imp_invalid) { CDEBUG(D_CONFIG, "not connecting OSC %s; administratively " "disabled\n", obd_uuid2str(tgt_uuid)); RETURN(0); } rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd, &lov_osc_uuid, data, NULL); if (rc || !lov->lov_tgts[index]->ltd_exp) { CERROR("Target %s connect error %d\n", obd_uuid2str(tgt_uuid), rc); RETURN(-ENODEV); } lov->lov_tgts[index]->ltd_reap = 0; CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index, obd_uuid2str(tgt_uuid), tgt_obd->obd_name, activate ? "":"in"); if (lov->targets_proc_entry != NULL) { struct proc_dir_entry *osc_symlink; struct obd_device *osc_obd; osc_obd = lov->lov_tgts[index]->ltd_exp->exp_obd; 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->targets_proc_entry, "../../../%s/%s", osc_obd->obd_type->typ_name, osc_obd->obd_name); if (osc_symlink == NULL) { CERROR("cannot register LOV target " "/proc/fs/lustre/%s/%s/target_obds/%s\n", obd->obd_type->typ_name, obd->obd_name, osc_obd->obd_name); } } RETURN(0); } static int lov_connect(const struct lu_env *env, struct obd_export **exp, struct obd_device *obd, struct obd_uuid *cluuid, struct obd_connect_data *data, void *localdata) { struct lov_obd *lov = &obd->u.lov; struct lov_tgt_desc *tgt; struct lustre_handle conn; int i, rc; 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; lov->targets_proc_entry = lprocfs_register("target_obds", obd->obd_proc_entry, NULL, NULL); if (IS_ERR(lov->targets_proc_entry)) { CERROR("%s: cannot register " "/proc/fs/lustre/%s/%s/target_obds\n", obd->obd_name, obd->obd_type->typ_name, obd->obd_name); lov->targets_proc_entry = NULL; } 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 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; } 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; if (lov->targets_proc_entry != NULL) lprocfs_remove_proc_entry(osc_obd->obd_name, lov->targets_proc_entry); } 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, NULL, lov->lov_tgts[i]->ltd_gen); } } obd_putref(obd); if (lov->targets_proc_entry != NULL) lprocfs_remove(&lov->targets_proc_entry); 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("%s: unknown event %d for uuid %s\n", obd->obd_name, 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, 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; 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 : ""); 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 "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) { 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 lov_desc *desc; struct lov_obd *lov = &obd->u.lov; #ifdef CONFIG_PROC_FS struct obd_type *type; #endif 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); #ifdef CONFIG_PROC_FS obd->obd_vars = lprocfs_lov_obd_vars; /* If this is true then both client (lov) and server * (lod) are on the same node. The lod layer if loaded * first will register the lov proc directory. In that * case obd->obd_type->typ_procroot will be not set. * Instead we use type->typ_procsym as the parent. */ type = class_search_type(LUSTRE_LOD_NAME); if (type != NULL && type->typ_procsym != NULL) { obd->obd_proc_entry = lprocfs_register(obd->obd_name, type->typ_procsym, obd->obd_vars, obd); if (IS_ERR(obd->obd_proc_entry)) { rc = PTR_ERR(obd->obd_proc_entry); CERROR("error %d setting up lprocfs for %s\n", rc, obd->obd_name); obd->obd_proc_entry = NULL; } } else { rc = lprocfs_obd_setup(obd); } if (rc == 0) { 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"); lov->lov_pool_proc_entry = lprocfs_register("pools", obd->obd_proc_entry, NULL, NULL); if (IS_ERR(lov->lov_pool_proc_entry)) { rc = PTR_ERR(lov->lov_pool_proc_entry); CERROR("error %d setting up lprocfs for pools\n", rc); lov->lov_pool_proc_entry = NULL; } } #endif RETURN(0); out: 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("%s: lov tgt %d not cleaned! " "deathrow=%d, lovrc=%d\n", obd->obd_name, 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; } if (lov->lov_cache != NULL) { cl_cache_decref(lov->lov_cache); lov->lov_cache = NULL; } RETURN(0); } int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg, __u32 *indexp, int *genp) { struct obd_uuid obd_uuid; int cmd; int rc = 0; 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), "%u", 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 lov_desc *desc = &(obd->u.lov.desc); if (!desc) GOTO(out, rc = -EINVAL); rc = class_process_proc_param(PARAM_LOV, obd->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_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 = { .oi_osfs = osfs, .oi_flags = flags, }; 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); rc = lov_statfs_async(exp, &oinfo, max_age, set); if (rc == 0) rc = ptlrpc_set_wait(set); ptlrpc_set_destroy(set); RETURN(rc); } static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len, void *karg, void __user *uarg) { struct obd_device *obddev = class_exp2obd(exp); struct lov_obd *lov = &obddev->u.lov; int i = 0, rc = 0, count = lov->desc.ld_tgt_count; struct obd_uuid *uuidp; 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(index)); if ((index >= count)) RETURN(-ENODEV); if (!lov->lov_tgts[index]) /* Try again with the next index */ RETURN(-EAGAIN); if (!lov->lov_tgts[index]->ltd_active) RETURN(-ENODATA); osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp); if (!osc_obd) RETURN(-EINVAL); /* copy UUID */ if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd), min_t(unsigned long, data->ioc_plen2, sizeof(struct obd_uuid)))) RETURN(-EFAULT); memcpy(&flags, data->ioc_inlbuf1, sizeof(flags)); flags = flags & LL_STATFS_NODELAY ? OBD_STATFS_NODELAY : 0; /* got statfs data */ rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf, cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS), flags); if (rc) RETURN(rc); if (copy_to_user(data->ioc_pbuf1, &stat_buf, min_t(unsigned long, data->ioc_plen1, sizeof(struct obd_statfs)))) RETURN(-EFAULT); break; } case OBD_IOC_LOV_GET_CONFIG: { struct obd_ioctl_data *data; struct lov_desc *desc; char *buf = NULL; __u32 *genp; len = 0; if (obd_ioctl_getdata(&buf, &len, uarg)) RETURN(-EINVAL); data = (struct obd_ioctl_data *)buf; if (sizeof(*desc) > data->ioc_inllen1) { 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(uarg, buf, len)) rc = -EFAULT; obd_ioctl_freedata(buf, len); break; } case OBD_IOC_QUOTACTL: { struct if_quotactl *qctl = karg; struct lov_tgt_desc *tgt = NULL; struct obd_quotactl *oqctl; if (qctl->qc_valid == QC_OSTIDX) { if (count <= qctl->qc_idx) RETURN(-EINVAL); tgt = lov->lov_tgts[qctl->qc_idx]; if (!tgt || !tgt->ltd_exp) RETURN(-EINVAL); } else if (qctl->qc_valid == QC_UUID) { for (i = 0; i < count; i++) { tgt = lov->lov_tgts[i]; if (!tgt || !obd_uuid_equals(&tgt->ltd_uuid, &qctl->obd_uuid)) continue; if (tgt->ltd_exp == 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) { if (lov->lov_tgts[i]->ltd_active) { CDEBUG(err == -ENOTTY ? D_IOCTL : D_WARNING, "iocontrol OSC %s on OST " "idx %d cmd %x: err = %d\n", lov_uuid2str(lov, i), i, cmd, err); if (!rc) rc = err; } } else { set = 1; } } if (!set && !rc) rc = -EIO; } } RETURN(rc); } static int lov_get_info(const struct lu_env *env, struct obd_export *exp, __u32 keylen, void *key, __u32 *vallen, void *val) { struct obd_device *obddev = class_exp2obd(exp); struct lov_obd *lov = &obddev->u.lov; struct lov_desc *ld = &lov->desc; int rc = 0; ENTRY; if (vallen == NULL || val == NULL) RETURN(-EFAULT); obd_getref(obddev); if (KEY_IS(KEY_MAX_EASIZE)) { u32 max_stripe_count = min_t(u32, ld->ld_active_tgt_count, LOV_MAX_STRIPE_COUNT); *((u32 *)val) = lov_mds_md_size(max_stripe_count, LOV_MAGIC_V3); } else if (KEY_IS(KEY_DEFAULT_EASIZE)) { u32 def_stripe_count = min_t(u32, ld->ld_default_stripe_count, LOV_MAX_STRIPE_COUNT); *((u32 *)val) = lov_mds_md_size(def_stripe_count, LOV_MAGIC_V3); } else if (KEY_IS(KEY_TGT_COUNT)) { *((int *)val) = lov->desc.ld_tgt_count; } else { rc = -EINVAL; } obd_putref(obddev); RETURN(rc); } static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp, __u32 keylen, void *key, __u32 vallen, void *val, struct ptlrpc_request_set *set) { struct obd_device *obddev = class_exp2obd(exp); struct lov_obd *lov = &obddev->u.lov; struct lov_tgt_desc *tgt; int do_inactive = 0; int no_set = 0; u32 count; u32 i; int rc = 0; int err; ENTRY; 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_CHECKSUM)) { do_inactive = 1; } else if (KEY_IS(KEY_CACHE_SET)) { LASSERT(lov->lov_cache == NULL); lov->lov_cache = val; do_inactive = 1; cl_cache_incref(lov->lov_cache); } for (i = 0; i < count; i++) { tgt = lov->lov_tgts[i]; /* OST was disconnected */ if (!tgt || !tgt->ltd_exp) continue; /* OST is inactive and we don't want inactive OSCs */ if (!tgt->ltd_active && !do_inactive) continue; err = obd_set_info_async(env, tgt->ltd_exp, keylen, key, vallen, val, set); if (!rc) rc = err; } obd_putref(obddev); if (no_set) { err = ptlrpc_set_wait(set); if (!rc) rc = err; ptlrpc_set_destroy(set); } RETURN(rc); } void lov_stripe_lock(struct lov_stripe_md *md) __acquires(&md->lsm_lock) { LASSERT(md->lsm_lock_owner != current_pid()); spin_lock(&md->lsm_lock); LASSERT(md->lsm_lock_owner == 0); md->lsm_lock_owner = current_pid(); } void lov_stripe_unlock(struct lov_stripe_md *md) __releases(&md->lsm_lock) { LASSERT(md->lsm_lock_owner == current_pid()); md->lsm_lock_owner = 0; spin_unlock(&md->lsm_lock); } static int lov_quotactl(struct obd_device *obd, struct obd_export *exp, struct obd_quotactl *oqctl) { struct lov_obd *lov = &obd->u.lov; struct lov_tgt_desc *tgt; __u64 curspace = 0; __u64 bhardlimit = 0; int i, rc = 0; ENTRY; if (oqctl->qc_cmd != Q_GETOQUOTA && oqctl->qc_cmd != LUSTRE_Q_SETQUOTA) { CERROR("%s: bad quota opc %x for lov obd\n", obd->obd_name, 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 = -ENETDOWN; CERROR("ost %d is inactive\n", i); } else { CDEBUG(D_HA, "ost %d is inactive\n", i); } continue; } err = obd_quotactl(tgt->ltd_exp, oqctl); if (err) { if (tgt->ltd_active && !rc) rc = err; continue; } if (oqctl->qc_cmd == Q_GETOQUOTA) { curspace += oqctl->qc_dqblk.dqb_curspace; bhardlimit += oqctl->qc_dqblk.dqb_bhardlimit; } } obd_putref(obd); if (oqctl->qc_cmd == Q_GETOQUOTA) { oqctl->qc_dqblk.dqb_curspace = curspace; oqctl->qc_dqblk.dqb_bhardlimit = bhardlimit; } RETURN(rc); } static struct obd_ops lov_obd_ops = { .o_owner = THIS_MODULE, .o_setup = lov_setup, .o_cleanup = lov_cleanup, .o_connect = lov_connect, .o_disconnect = lov_disconnect, .o_statfs = lov_statfs, .o_statfs_async = lov_statfs_async, .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, }; struct kmem_cache *lov_oinfo_slab; static int __init lov_init(void) { bool enable_proc = true; struct obd_type *type; 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; } type = class_search_type(LUSTRE_LOD_NAME); if (type != NULL && type->typ_procsym != NULL) enable_proc = false; rc = class_register_type(&lov_obd_ops, NULL, enable_proc, NULL, LUSTRE_LOV_NAME, &lov_device_type); if (rc) { kmem_cache_destroy(lov_oinfo_slab); lu_kmem_fini(lov_caches); } RETURN(rc); } static void __exit lov_exit(void) { class_unregister_type(LUSTRE_LOV_NAME); kmem_cache_destroy(lov_oinfo_slab); lu_kmem_fini(lov_caches); } MODULE_AUTHOR("OpenSFS, Inc. "); MODULE_DESCRIPTION("Lustre Logical Object Volume"); MODULE_VERSION(LUSTRE_VERSION_STRING); MODULE_LICENSE("GPL"); module_init(lov_init); module_exit(lov_exit);