/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * 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. */ /* * 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 */ #ifndef EXPORT_SYMTAB # define EXPORT_SYMTAB #endif #define DEBUG_SUBSYSTEM S_LOV #ifdef __KERNEL__ #include #else #include #endif #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 */ cfs_mutex_down(&lov->lov_lock); cfs_atomic_inc(&lov->lov_refcount); cfs_mutex_up(&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; cfs_mutex_down(&lov->lov_lock); /* ok to dec to 0 more than once -- ltd_exp's will be null */ if (cfs_atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) { CFS_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; cfs_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--; } cfs_mutex_up(&lov->lov_lock); cfs_list_for_each_entry_safe(tgt, n, &kill, ltd_kill) { cfs_list_del(&tgt->ltd_kill); /* Disconnect */ __lov_del_obd(obd, tgt); } } else { cfs_mutex_up(&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; #ifdef __KERNEL__ cfs_proc_dir_entry_t *lov_proc_dir; #endif int rc; ENTRY; if (!lov->lov_tgts[index]) RETURN(-EINVAL); tgt_uuid = &lov->lov_tgts[index]->ltd_uuid; tgt_obd = lov->lov_tgts[index]->ltd_obd; if (!tgt_obd->obd_set_up) { CERROR("Target %s not set up\n", obd_uuid2str(tgt_uuid)); RETURN(-EINVAL); } /* override the sp_me from lov */ tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me; if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX)) data->ocd_index = index; /* * Divine LOV knows that OBDs under it are OSCs. */ imp = tgt_obd->u.cli.cl_import; if (activate) { tgt_obd->obd_no_recov = 0; /* FIXME this is probably supposed to be ptlrpc_set_import_active. Horrible naming. */ ptlrpc_activate_import(imp); } rc = obd_register_observer(tgt_obd, obd); if (rc) { CERROR("Target %s register_observer error %d\n", obd_uuid2str(tgt_uuid), rc); RETURN(rc); } if (imp->imp_invalid) { CERROR("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"); #ifdef __KERNEL__ lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds"); if (lov_proc_dir) { struct obd_device *osc_obd = lov->lov_tgts[index]->ltd_exp->exp_obd; cfs_proc_dir_entry_t *osc_symlink; LASSERT(osc_obd != NULL); LASSERT(osc_obd->obd_magic == OBD_DEVICE_MAGIC); LASSERT(osc_obd->obd_type->typ_name != NULL); osc_symlink = lprocfs_add_symlink(osc_obd->obd_name, lov_proc_dir, "../../../%s/%s", osc_obd->obd_type->typ_name, osc_obd->obd_name); if (osc_symlink == NULL) { CERROR("could not register LOV target " "/proc/fs/lustre/%s/%s/target_obds/%s.", obd->obd_type->typ_name, obd->obd_name, osc_obd->obd_name); lprocfs_remove(&lov_proc_dir); } } #endif rc = qos_add_tgt(obd, index); if (rc) CERROR("qos_add_tgt failed %d\n", rc); RETURN(0); } static int lov_connect(const struct lu_env *env, struct obd_export **exp, struct obd_device *obd, struct obd_uuid *cluuid, struct obd_connect_data *data, void *localdata) { struct lov_obd *lov = &obd->u.lov; struct lov_tgt_desc *tgt; struct lustre_handle conn; int i, rc; ENTRY; CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects); rc = class_connect(&conn, obd, cluuid); if (rc) RETURN(rc); *exp = class_conn2export(&conn); /* Why should there ever be more than 1 connect? */ lov->lov_connects++; LASSERT(lov->lov_connects == 1); memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd)); if (data) lov->lov_ocd = *data; obd_getref(obd); for (i = 0; i < lov->desc.ld_tgt_count; i++) { tgt = lov->lov_tgts[i]; if (!tgt || obd_uuid_empty(&tgt->ltd_uuid)) continue; /* Flags will be lowest common denominator */ rc = lov_connect_obd(obd, i, tgt->ltd_activate, &lov->lov_ocd); if (rc) { CERROR("%s: lov connect tgt %d failed: %d\n", obd->obd_name, i, rc); continue; } /* connect to administrative disabled ost */ if (!lov->lov_tgts[i]->ltd_exp) continue; rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd, OBD_NOTIFY_CONNECT, (void *)&i); if (rc) { CERROR("%s error sending notify %d\n", obd->obd_name, rc); } } obd_putref(obd); RETURN(0); } static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt) { cfs_proc_dir_entry_t *lov_proc_dir; struct lov_obd *lov = &obd->u.lov; struct obd_device *osc_obd; int rc; ENTRY; osc_obd = class_exp2obd(tgt->ltd_exp); CDEBUG(D_CONFIG, "%s: disconnecting target %s\n", obd->obd_name, osc_obd->obd_name); if (tgt->ltd_active) { tgt->ltd_active = 0; lov->desc.ld_active_tgt_count--; tgt->ltd_exp->exp_obd->obd_inactive = 1; } lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds"); if (lov_proc_dir) { cfs_proc_dir_entry_t *osc_symlink; osc_symlink = lprocfs_srch(lov_proc_dir, osc_obd->obd_name); if (osc_symlink) { lprocfs_remove(&osc_symlink); } else { CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing.", obd->obd_type->typ_name, obd->obd_name, osc_obd->obd_name); } } if (osc_obd) { /* Pass it on to our clients. * XXX This should be an argument to disconnect, * XXX not a back-door flag on the OBD. Ah well. */ osc_obd->obd_force = obd->obd_force; osc_obd->obd_fail = obd->obd_fail; osc_obd->obd_no_recov = obd->obd_no_recov; } obd_register_observer(osc_obd, NULL); rc = obd_disconnect(tgt->ltd_exp); if (rc) { CERROR("Target %s disconnect error %d\n", tgt->ltd_uuid.uuid, rc); rc = 0; } qos_del_tgt(obd, tgt); tgt->ltd_exp = NULL; RETURN(0); } static int lov_disconnect(struct obd_export *exp) { struct obd_device *obd = class_exp2obd(exp); struct lov_obd *lov = &obd->u.lov; int i, rc; ENTRY; if (!lov->lov_tgts) goto out; /* Only disconnect the underlying layers on the final disconnect. */ lov->lov_connects--; if (lov->lov_connects != 0) { /* why should there be more than 1 connect? */ CERROR("disconnect #%d\n", lov->lov_connects); goto out; } /* Let's hold another reference so lov_del_obd doesn't spin through putref every time */ obd_getref(obd); for (i = 0; i < lov->desc.ld_tgt_count; i++) { if (lov->lov_tgts[i] && lov->lov_tgts[i]->ltd_exp) { /* Disconnection is the last we know about an obd */ lov_del_target(obd, i, 0, lov->lov_tgts[i]->ltd_gen); } } obd_putref(obd); out: rc = class_disconnect(exp); /* bz 9811 */ RETURN(rc); } /* Error codes: * * -EINVAL : UUID can't be found in the LOV's target list * -ENOTCONN: The UUID is found, but the target connection is bad (!) * -EBADF : The UUID is found, but the OBD is the wrong type (!) * any >= 0 : is log target index */ static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid, enum obd_notify_event ev) { struct lov_obd *lov = &obd->u.lov; struct lov_tgt_desc *tgt; int index, activate, active; ENTRY; CDEBUG(D_INFO, "Searching in lov %p for uuid %s event(%d)\n", lov, uuid->uuid, ev); obd_getref(obd); for (index = 0; index < lov->desc.ld_tgt_count; index++) { tgt = lov->lov_tgts[index]; if (!tgt || !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; } /* remove any old qos penalty */ lov->lov_tgts[index]->ltd_qos.ltq_penalty = 0; } 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; ENTRY; 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)) { 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) { 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); } 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); cfs_mutex_down(&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); cfs_mutex_up(&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) { cfs_mutex_up(&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; #ifdef __KERNEL__ smp_rmb(); #endif 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) { cfs_mutex_up(&lov->lov_lock); RETURN(-ENOMEM); } rc = lov_ost_pool_add(&lov->lov_packed, index, lov->lov_tgt_size); if (rc) { cfs_mutex_up(&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; cfs_mutex_up(&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); rc = lov_notify(obd, tgt->ltd_exp->exp_obd, active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE, (void *)&index); out: if (rc) { CERROR("add failed (%d), deleting %s\n", rc, obd_uuid2str(&tgt->ltd_uuid)); lov_del_target(obd, index, 0, 0); } obd_putref(obd); RETURN(rc); } /* Schedule a target for deletion */ int lov_del_target(struct obd_device *obd, __u32 index, struct obd_uuid *uuidp, int gen) { struct lov_obd *lov = &obd->u.lov; int count = lov->desc.ld_tgt_count; int rc = 0; ENTRY; if (index >= count) { CERROR("LOV target index %d >= number of LOV OBDs %d.\n", index, count); RETURN(-EINVAL); } 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); 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 < PTLRPC_MAX_BRW_SIZE) { LCONSOLE_WARN("Increasing default stripe size to min %u\n", PTLRPC_MAX_BRW_SIZE); *val = PTLRPC_MAX_BRW_SIZE; } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) { *val &= ~(LOV_MIN_STRIPE_SIZE - 1); LCONSOLE_WARN("Changing default stripe size to "LPU64" (a " "multiple of %u)\n", *val, LOV_MIN_STRIPE_SIZE); } } void lov_fix_desc_stripe_count(__u32 *val) { if (*val == 0) *val = 1; } void lov_fix_desc_pattern(__u32 *val) { /* from lov_setstripe */ if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) { LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val); *val = 0; } } void lov_fix_desc_qos_maxage(__u32 *val) { /* fix qos_maxage */ if (*val == 0) *val = QOS_DEFAULT_MAXAGE; } void lov_fix_desc(struct lov_desc *desc) { lov_fix_desc_stripe_size(&desc->ld_default_stripe_size); lov_fix_desc_stripe_count(&desc->ld_default_stripe_count); lov_fix_desc_pattern(&desc->ld_pattern); lov_fix_desc_qos_maxage(&desc->ld_qos_maxage); } int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg) { struct lprocfs_static_vars lvars = { 0 }; struct lov_desc *desc; struct lov_obd *lov = &obd->u.lov; int rc; ENTRY; if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) { CERROR("LOV setup requires a descriptor\n"); RETURN(-EINVAL); } desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1); if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) { CERROR("descriptor size wrong: %d > %d\n", (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1)); RETURN(-EINVAL); } if (desc->ld_magic != LOV_DESC_MAGIC) { if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) { CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n", obd->obd_name, desc); lustre_swab_lov_desc(desc); } else { CERROR("%s: Bad lov desc magic: %#x\n", obd->obd_name, desc->ld_magic); RETURN(-EINVAL); } } lov_fix_desc(desc); desc->ld_active_tgt_count = 0; lov->desc = *desc; lov->lov_tgt_size = 0; cfs_sema_init(&lov->lov_lock, 1); cfs_atomic_set(&lov->lov_refcount, 0); CFS_INIT_LIST_HEAD(&lov->lov_qos.lq_oss_list); cfs_init_rwsem(&lov->lov_qos.lq_rw_sem); lov->lov_sp_me = LUSTRE_SP_CLI; lov->lov_qos.lq_dirty = 1; lov->lov_qos.lq_rr.lqr_dirty = 1; lov->lov_qos.lq_reset = 1; /* Default priority is toward free space balance */ lov->lov_qos.lq_prio_free = 232; /* Default threshold for rr (roughly 17%) */ lov->lov_qos.lq_threshold_rr = 43; /* Init statfs fields */ OBD_ALLOC_PTR(lov->lov_qos.lq_statfs_data); if (NULL == lov->lov_qos.lq_statfs_data) RETURN(-ENOMEM); cfs_waitq_init(&lov->lov_qos.lq_statfs_waitq); 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); CFS_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_free_statfs, rc); rc = lov_ost_pool_init(&lov->lov_qos.lq_rr.lqr_pool, 0); if (rc) GOTO(out_free_lov_packed, rc); lprocfs_lov_init_vars(&lvars); lprocfs_obd_setup(obd, lvars.obd_vars); #ifdef LPROCFS { int rc; rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd", 0444, &lov_proc_target_fops, obd); if (rc) CWARN("Error adding the target_obd file\n"); } #endif lov->lov_pool_proc_entry = lprocfs_register("pools", obd->obd_proc_entry, NULL, NULL); RETURN(0); out_free_lov_packed: lov_ost_pool_free(&lov->lov_packed); out_free_statfs: OBD_FREE_PTR(lov->lov_qos.lq_statfs_data); return rc; } static int lov_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage) { int rc = 0; struct lov_obd *lov = &obd->u.lov; ENTRY; switch (stage) { case OBD_CLEANUP_EARLY: { int i; for (i = 0; i < lov->desc.ld_tgt_count; i++) { if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active) continue; obd_precleanup(class_exp2obd(lov->lov_tgts[i]->ltd_exp), OBD_CLEANUP_EARLY); } break; } case OBD_CLEANUP_EXPORTS: rc = obd_llog_finish(obd, 0); if (rc != 0) CERROR("failed to cleanup llogging subsystems\n"); break; } RETURN(rc); } static int lov_cleanup(struct obd_device *obd) { struct lov_obd *lov = &obd->u.lov; cfs_list_t *pos, *tmp; struct pool_desc *pool; cfs_list_for_each_safe(pos, tmp, &lov->lov_pool_list) { pool = cfs_list_entry(pos, struct pool_desc, pool_list); /* free pool structs */ CDEBUG(D_INFO, "delete pool %p\n", pool); lov_pool_del(obd, pool->pool_name); } cfs_hash_putref(lov->lov_pools_hash_body); lov_ost_pool_free(&(lov->lov_qos.lq_rr.lqr_pool)); lov_ost_pool_free(&lov->lov_packed); 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 || cfs_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, cfs_atomic_read(&lov->lov_refcount)); lov_del_target(obd, i, 0, 0); } obd_putref(obd); OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) * lov->lov_tgt_size); lov->lov_tgt_size = 0; } /* clear pools parent proc entry only after all pools is killed */ lprocfs_obd_cleanup(obd); OBD_FREE_PTR(lov->lov_qos.lq_statfs_data); RETURN(0); } int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg, __u32 *indexp, int *genp) { struct obd_uuid obd_uuid; int cmd; int rc = 0; ENTRY; switch(cmd = lcfg->lcfg_command) { case LCFG_LOV_ADD_OBD: case LCFG_LOV_ADD_INA: case LCFG_LOV_DEL_OBD: { __u32 index; int gen; /* lov_modify_tgts add 0:lov_mdsA 1:ost1_UUID 2:0 3:1 */ if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid)) GOTO(out, rc = -EINVAL); obd_str2uuid(&obd_uuid, lustre_cfg_buf(lcfg, 1)); if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", indexp) != 1) GOTO(out, rc = -EINVAL); if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", genp) != 1) GOTO(out, rc = -EINVAL); index = *indexp; gen = *genp; if (cmd == LCFG_LOV_ADD_OBD) rc = lov_add_target(obd, &obd_uuid, index, gen, 1); else if (cmd == LCFG_LOV_ADD_INA) rc = lov_add_target(obd, &obd_uuid, index, gen, 0); else rc = lov_del_target(obd, index, &obd_uuid, gen); GOTO(out, rc); } case LCFG_PARAM: { struct lprocfs_static_vars lvars = { 0 }; struct lov_desc *desc = &(obd->u.lov.desc); if (!desc) GOTO(out, rc = -EINVAL); lprocfs_lov_init_vars(&lvars); rc = class_process_proc_param(PARAM_LOV, lvars.obd_vars, lcfg, obd); if (rc > 0) rc = 0; GOTO(out, rc); } case LCFG_POOL_NEW: case LCFG_POOL_ADD: case LCFG_POOL_DEL: case LCFG_POOL_REM: GOTO(out, rc); default: { CERROR("Unknown command: %d\n", lcfg->lcfg_command); GOTO(out, rc = -EINVAL); } } out: RETURN(rc); } #ifndef log2 #define log2(n) cfs_ffz(~(n)) #endif static int lov_clear_orphans(struct obd_export *export, struct obdo *src_oa, struct lov_stripe_md **ea, struct obd_trans_info *oti) { struct lov_obd *lov; struct obdo *tmp_oa; struct obd_uuid *ost_uuid = NULL; int rc = 0, i; ENTRY; LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS && src_oa->o_flags == OBD_FL_DELORPHAN); lov = &export->exp_obd->u.lov; OBDO_ALLOC(tmp_oa); if (tmp_oa == NULL) RETURN(-ENOMEM); if (oti->oti_ost_uuid) { ost_uuid = oti->oti_ost_uuid; CDEBUG(D_HA, "clearing orphans only for %s\n", ost_uuid->uuid); } obd_getref(export->exp_obd); for (i = 0; i < lov->desc.ld_tgt_count; i++) { struct lov_stripe_md obj_md; struct lov_stripe_md *obj_mdp = &obj_md; struct lov_tgt_desc *tgt; int err; tgt = lov->lov_tgts[i]; if (!tgt) continue; /* if called for a specific target, we don't care if it is not active. */ if (!lov->lov_tgts[i]->ltd_active && ost_uuid == NULL) { CDEBUG(D_HA, "lov idx %d inactive\n", i); continue; } if (ost_uuid && !obd_uuid_equals(ost_uuid, &tgt->ltd_uuid)) continue; CDEBUG(D_CONFIG,"Clear orphans for %d:%s\n", i, obd_uuid2str(ost_uuid)); memcpy(tmp_oa, src_oa, sizeof(*tmp_oa)); LASSERT(lov->lov_tgts[i]->ltd_exp); /* XXX: LOV STACKING: use real "obj_mdp" sub-data */ err = obd_create(lov->lov_tgts[i]->ltd_exp, tmp_oa, &obj_mdp, oti); if (err) { /* This export will be disabled until it is recovered, and then orphan recovery will be completed. */ CERROR("error in orphan recovery on OST idx %d/%d: " "rc = %d\n", i, lov->desc.ld_tgt_count, err); rc = err; } if (ost_uuid) break; } obd_putref(export->exp_obd); OBDO_FREE(tmp_oa); RETURN(rc); } static int lov_recreate(struct obd_export *exp, struct obdo *src_oa, struct lov_stripe_md **ea, struct obd_trans_info *oti) { struct lov_stripe_md *obj_mdp, *lsm; struct lov_obd *lov = &exp->exp_obd->u.lov; unsigned ost_idx; int rc, i; ENTRY; LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS && src_oa->o_flags & OBD_FL_RECREATE_OBJS); OBD_ALLOC(obj_mdp, sizeof(*obj_mdp)); if (obj_mdp == NULL) RETURN(-ENOMEM); ost_idx = src_oa->o_nlink; lsm = *ea; if (lsm == NULL) GOTO(out, rc = -EINVAL); if (ost_idx >= lov->desc.ld_tgt_count || !lov->lov_tgts[ost_idx]) GOTO(out, rc = -EINVAL); for (i = 0; i < lsm->lsm_stripe_count; i++) { if (lsm->lsm_oinfo[i]->loi_ost_idx == ost_idx) { if (lsm->lsm_oinfo[i]->loi_id != src_oa->o_id) GOTO(out, rc = -EINVAL); break; } } if (i == lsm->lsm_stripe_count) GOTO(out, rc = -EINVAL); rc = obd_create(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(struct obd_export *exp, struct obdo *src_oa, struct lov_stripe_md **ea, struct obd_trans_info *oti) { struct lov_obd *lov; struct obd_info oinfo; struct lov_request_set *set = NULL; struct lov_request *req; struct l_wait_info lwi = { 0 }; int rc = 0; ENTRY; LASSERT(ea != NULL); if (exp == NULL) RETURN(-EINVAL); if ((src_oa->o_valid & OBD_MD_FLFLAGS) && src_oa->o_flags == OBD_FL_DELORPHAN) { rc = lov_clear_orphans(exp, src_oa, ea, oti); RETURN(rc); } 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); GOTO(out, rc); } /* issue statfs rpcs if the osfs data is older than qos_maxage - 1s, * later in alloc_qos(), we will wait for those rpcs to complete if * the osfs age is older than 2 * qos_maxage */ qos_statfs_update(exp->exp_obd, cfs_time_shift_64(-lov->desc.ld_qos_maxage + OBD_STATFS_CACHE_SECONDS), 0); rc = lov_prep_create_set(exp, &oinfo, ea, src_oa, oti, &set); if (rc) GOTO(out, rc); cfs_list_for_each_entry(req, &set->set_list, rq_link) { /* XXX: LOV STACKING: use real "obj_mdp" sub-data */ rc = obd_create_async(lov->lov_tgts[req->rq_idx]->ltd_exp, &req->rq_oi, &req->rq_oi.oi_md, oti); } /* osc_create have timeout equ obd_timeout/2 so waiting don't be * longer then this */ l_wait_event(set->set_waitq, lov_finished_set(set), &lwi); /* we not have ptlrpc set for assign set->interpret and should * be call interpret function himself. calling from cb_create_update * not permited because lov_fini_create_set can sleep for long time, * but we must avoid sleeping in ptlrpcd interpret function. */ rc = lov_fini_create_set(set, ea); out: 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(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; cfs_list_t *pos; struct lov_obd *lov; int rc = 0, err = 0; ENTRY; ASSERT_LSM_MAGIC(lsm); if (!exp || !exp->exp_obd) RETURN(-ENODEV); if (oa->o_valid & OBD_MD_FLCOOKIE) { LASSERT(oti); LASSERT(oti->oti_logcookies); } lov = &exp->exp_obd->u.lov; obd_getref(exp->exp_obd); rc = lov_prep_destroy_set(exp, &oinfo, oa, lsm, oti, &set); if (rc) GOTO(out, rc); cfs_list_for_each (pos, &set->set_list) { req = cfs_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(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("error: destroying objid "LPX64" subobj " LPX64" on OST idx %d: rc = %d\n", oa->o_id, req->rq_oi.oi_oa->o_id, 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(struct obd_export *exp, struct obd_info *oinfo) { struct lov_request_set *set; struct lov_request *req; cfs_list_t *pos; struct lov_obd *lov; int err = 0, rc = 0; ENTRY; LASSERT(oinfo); ASSERT_LSM_MAGIC(oinfo->oi_md); if (!exp || !exp->exp_obd) RETURN(-ENODEV); lov = &exp->exp_obd->u.lov; rc = lov_prep_getattr_set(exp, oinfo, &set); if (rc) RETURN(rc); cfs_list_for_each (pos, &set->set_list) { req = cfs_list_entry(pos, struct lov_request, rq_link); CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx " "%u\n", oinfo->oi_oa->o_id, req->rq_stripe, req->rq_oi.oi_oa->o_id, req->rq_idx); rc = obd_getattr(lov->lov_tgts[req->rq_idx]->ltd_exp, &req->rq_oi); err = lov_update_common_set(set, req, rc); if (err) { CERROR("error: getattr objid "LPX64" subobj " LPX64" on OST idx %d: rc = %d\n", oinfo->oi_oa->o_id, req->rq_oi.oi_oa->o_id, req->rq_idx, err); break; } } rc = lov_fini_getattr_set(set); if (err) rc = err; RETURN(rc); } static int lov_getattr_interpret(struct ptlrpc_request_set *rqset, void *data, int rc) { struct lov_request_set *lovset = (struct lov_request_set *)data; int err; ENTRY; /* don't do attribute merge if this aysnc op failed */ if (rc) 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; cfs_list_t *pos; struct lov_request *req; int rc = 0, err; ENTRY; LASSERT(oinfo); ASSERT_LSM_MAGIC(oinfo->oi_md); if (!exp || !exp->exp_obd) RETURN(-ENODEV); lov = &exp->exp_obd->u.lov; rc = lov_prep_getattr_set(exp, oinfo, &lovset); if (rc) RETURN(rc); CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n", oinfo->oi_md->lsm_object_id, oinfo->oi_md->lsm_stripe_count, oinfo->oi_md->lsm_stripe_size); cfs_list_for_each (pos, &lovset->set_list) { req = cfs_list_entry(pos, struct lov_request, rq_link); CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx " "%u\n", oinfo->oi_oa->o_id, req->rq_stripe, req->rq_oi.oi_oa->o_id, req->rq_idx); rc = obd_getattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp, &req->rq_oi, rqset); if (rc) { CERROR("error: getattr objid "LPX64" subobj " LPX64" on OST idx %d: rc = %d\n", oinfo->oi_oa->o_id, req->rq_oi.oi_oa->o_id, req->rq_idx, rc); GOTO(out, rc); } } if (!cfs_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) lovset->set_completes = 0; err = lov_fini_getattr_set(lovset); RETURN(rc ? rc : err); } static int lov_setattr(struct obd_export *exp, struct obd_info *oinfo, struct obd_trans_info *oti) { struct lov_request_set *set; struct lov_obd *lov; cfs_list_t *pos; struct lov_request *req; int err = 0, rc = 0; ENTRY; LASSERT(oinfo); ASSERT_LSM_MAGIC(oinfo->oi_md); if (!exp || !exp->exp_obd) RETURN(-ENODEV); /* for now, we only expect the following updates here */ LASSERT(!(oinfo->oi_oa->o_valid & ~(OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLMODE | OBD_MD_FLATIME | OBD_MD_FLMTIME | OBD_MD_FLCTIME | OBD_MD_FLFLAGS | OBD_MD_FLSIZE | OBD_MD_FLGROUP | OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLFID | OBD_MD_FLGENER))); lov = &exp->exp_obd->u.lov; rc = lov_prep_setattr_set(exp, oinfo, oti, &set); if (rc) RETURN(rc); cfs_list_for_each (pos, &set->set_list) { req = cfs_list_entry(pos, struct lov_request, rq_link); rc = obd_setattr(lov->lov_tgts[req->rq_idx]->ltd_exp, &req->rq_oi, NULL); err = lov_update_setattr_set(set, req, rc); if (err) { CERROR("error: setattr objid "LPX64" subobj " LPX64" on OST idx %d: rc = %d\n", set->set_oi->oi_oa->o_id, req->rq_oi.oi_oa->o_id, req->rq_idx, err); if (!rc) rc = err; } } err = lov_fini_setattr_set(set); if (!rc) rc = err; RETURN(rc); } static int lov_setattr_interpret(struct ptlrpc_request_set *rqset, void *data, int rc) { struct lov_request_set *lovset = (struct lov_request_set *)data; int err; ENTRY; if (rc) 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; cfs_list_t *pos; struct lov_obd *lov; int rc = 0; ENTRY; LASSERT(oinfo); ASSERT_LSM_MAGIC(oinfo->oi_md); if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) { LASSERT(oti); LASSERT(oti->oti_logcookies); } if (!exp || !exp->exp_obd) RETURN(-ENODEV); lov = &exp->exp_obd->u.lov; rc = lov_prep_setattr_set(exp, oinfo, oti, &set); if (rc) RETURN(rc); CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n", oinfo->oi_md->lsm_object_id, oinfo->oi_md->lsm_stripe_count, oinfo->oi_md->lsm_stripe_size); cfs_list_for_each (pos, &set->set_list) { req = cfs_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 "LPX64"[%d] has subobj "LPX64" at idx " "%u\n", oinfo->oi_oa->o_id, req->rq_stripe, req->rq_oi.oi_oa->o_id, 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 "LPX64" subobj " LPX64" on OST idx %d: rc = %d\n", set->set_oi->oi_oa->o_id, req->rq_oi.oi_oa->o_id, req->rq_idx, rc); break; } } /* If we are not waiting for responses on async requests, return. */ if (rc || !rqset || cfs_list_empty(&rqset->set_requests)) { int err; if (rc) set->set_completes = 0; err = lov_fini_setattr_set(set); RETURN(rc ? rc : err); } LASSERT(rqset->set_interpret == NULL); rqset->set_interpret = lov_setattr_interpret; rqset->set_arg = (void *)set; RETURN(0); } static int lov_punch_interpret(struct ptlrpc_request_set *rqset, void *data, int rc) { struct lov_request_set *lovset = (struct lov_request_set *)data; int err; ENTRY; if (rc) lovset->set_completes = 0; err = lov_fini_punch_set(lovset); RETURN(rc ? rc : err); } /* FIXME: maybe we'll just make one node the authoritative attribute node, then * we can send this 'punch' to just the authoritative node and the nodes * that the punch will affect. */ static int lov_punch(struct obd_export *exp, struct obd_info *oinfo, struct obd_trans_info *oti, struct ptlrpc_request_set *rqset) { struct lov_request_set *set; struct lov_obd *lov; cfs_list_t *pos; struct lov_request *req; int rc = 0; ENTRY; LASSERT(oinfo); ASSERT_LSM_MAGIC(oinfo->oi_md); if (!exp || !exp->exp_obd) RETURN(-ENODEV); lov = &exp->exp_obd->u.lov; rc = lov_prep_punch_set(exp, oinfo, oti, &set); if (rc) RETURN(rc); cfs_list_for_each (pos, &set->set_list) { req = cfs_list_entry(pos, struct lov_request, rq_link); rc = obd_punch(lov->lov_tgts[req->rq_idx]->ltd_exp, &req->rq_oi, NULL, rqset); if (rc) { CERROR("error: punch objid "LPX64" subobj "LPX64 " on OST idx %d: rc = %d\n", set->set_oi->oi_oa->o_id, req->rq_oi.oi_oa->o_id, req->rq_idx, rc); break; } } if (rc || cfs_list_empty(&rqset->set_requests)) { int err; err = lov_fini_punch_set(set); RETURN(rc ? rc : err); } LASSERT(rqset->set_interpret == NULL); rqset->set_interpret = lov_punch_interpret; rqset->set_arg = (void *)set; RETURN(0); } static int lov_sync_interpret(struct ptlrpc_request_set *rqset, void *data, int rc) { struct lov_request_set *lovset = data; int err; ENTRY; if (rc) lovset->set_completes = 0; err = lov_fini_sync_set(lovset); RETURN(rc ?: err); } static int lov_sync(struct obd_export *exp, struct obd_info *oinfo, obd_off start, obd_off end, struct ptlrpc_request_set *rqset) { struct lov_request_set *set = NULL; struct lov_obd *lov; cfs_list_t *pos; struct lov_request *req; int rc = 0; ENTRY; ASSERT_LSM_MAGIC(oinfo->oi_md); LASSERT(rqset != NULL); if (!exp->exp_obd) RETURN(-ENODEV); lov = &exp->exp_obd->u.lov; rc = lov_prep_sync_set(exp, oinfo, start, end, &set); if (rc) RETURN(rc); CDEBUG(D_INFO, "fsync objid "LPX64" ["LPX64", "LPX64"]\n", set->set_oi->oi_oa->o_id, start, end); cfs_list_for_each (pos, &set->set_list) { req = cfs_list_entry(pos, struct lov_request, rq_link); rc = obd_sync(lov->lov_tgts[req->rq_idx]->ltd_exp, &req->rq_oi, req->rq_oi.oi_policy.l_extent.start, req->rq_oi.oi_policy.l_extent.end, rqset); if (rc) { CERROR("error: fsync objid "LPX64" subobj "LPX64 " on OST idx %d: rc = %d\n", set->set_oi->oi_oa->o_id, req->rq_oi.oi_oa->o_id, req->rq_idx, rc); break; } } /* If we are not waiting for responses on async requests, return. */ if (rc || cfs_list_empty(&rqset->set_requests)) { int err = lov_fini_sync_set(set); RETURN(rc ?: err); } LASSERT(rqset->set_interpret == NULL); rqset->set_interpret = lov_sync_interpret; rqset->set_arg = (void *)set; RETURN(0); } static int lov_brw_check(struct lov_obd *lov, struct obd_info *lov_oinfo, obd_count oa_bufs, struct brw_page *pga) { struct obd_info oinfo = { { { 0 } } }; int i, rc = 0; oinfo.oi_oa = lov_oinfo->oi_oa; /* The caller just wants to know if there's a chance that this * I/O can succeed */ for (i = 0; i < oa_bufs; i++) { int stripe = lov_stripe_number(lov_oinfo->oi_md, pga[i].off); int ost = lov_oinfo->oi_md->lsm_oinfo[stripe]->loi_ost_idx; obd_off start, end; if (!lov_stripe_intersects(lov_oinfo->oi_md, i, pga[i].off, pga[i].off + pga[i].count - 1, &start, &end)) continue; if (!lov->lov_tgts[ost] || !lov->lov_tgts[ost]->ltd_active) { CDEBUG(D_HA, "lov idx %d inactive\n", ost); return -EIO; } rc = obd_brw(OBD_BRW_CHECK, lov->lov_tgts[ost]->ltd_exp, &oinfo, 1, &pga[i], NULL); if (rc) break; } return rc; } static int lov_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo, obd_count oa_bufs, struct brw_page *pga, struct obd_trans_info *oti) { struct lov_request_set *set; struct lov_request *req; cfs_list_t *pos; struct lov_obd *lov = &exp->exp_obd->u.lov; int err, rc = 0; ENTRY; ASSERT_LSM_MAGIC(oinfo->oi_md); if (cmd == OBD_BRW_CHECK) { rc = lov_brw_check(lov, oinfo, oa_bufs, pga); RETURN(rc); } rc = lov_prep_brw_set(exp, oinfo, oa_bufs, pga, oti, &set); if (rc) RETURN(rc); cfs_list_for_each (pos, &set->set_list) { struct obd_export *sub_exp; struct brw_page *sub_pga; req = cfs_list_entry(pos, struct lov_request, rq_link); sub_exp = lov->lov_tgts[req->rq_idx]->ltd_exp; sub_pga = set->set_pga + req->rq_pgaidx; rc = obd_brw(cmd, sub_exp, &req->rq_oi, req->rq_oabufs, sub_pga, oti); if (rc) break; lov_update_common_set(set, req, rc); } err = lov_fini_brw_set(set); if (!rc) rc = err; RETURN(rc); } static int lov_enqueue_interpret(struct ptlrpc_request_set *rqset, void *data, int rc) { struct lov_request_set *lovset = (struct lov_request_set *)data; ENTRY; rc = lov_fini_enqueue_set(lovset, lovset->set_ei->ei_mode, rc, rqset); RETURN(rc); } static int lov_enqueue(struct obd_export *exp, struct obd_info *oinfo, struct ldlm_enqueue_info *einfo, struct ptlrpc_request_set *rqset) { ldlm_mode_t mode = einfo->ei_mode; struct lov_request_set *set; struct lov_request *req; cfs_list_t *pos; struct lov_obd *lov; ldlm_error_t rc; ENTRY; LASSERT(oinfo); ASSERT_LSM_MAGIC(oinfo->oi_md); LASSERT(mode == (mode & -mode)); /* we should never be asked to replay a lock this way. */ LASSERT((oinfo->oi_flags & LDLM_FL_REPLAY) == 0); if (!exp || !exp->exp_obd) RETURN(-ENODEV); lov = &exp->exp_obd->u.lov; rc = lov_prep_enqueue_set(exp, oinfo, einfo, &set); if (rc) RETURN(rc); cfs_list_for_each (pos, &set->set_list) { req = cfs_list_entry(pos, struct lov_request, rq_link); rc = obd_enqueue(lov->lov_tgts[req->rq_idx]->ltd_exp, &req->rq_oi, einfo, rqset); if (rc != ELDLM_OK) GOTO(out, rc); } if (rqset && !cfs_list_empty(&rqset->set_requests)) { LASSERT(rc == 0); LASSERT(rqset->set_interpret == NULL); rqset->set_interpret = lov_enqueue_interpret; rqset->set_arg = (void *)set; RETURN(rc); } out: rc = lov_fini_enqueue_set(set, mode, rc, rqset); RETURN(rc); } static int lov_change_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm, ldlm_iterator_t it, void *data) { struct lov_obd *lov; int rc = 0, i; ENTRY; ASSERT_LSM_MAGIC(lsm); if (!exp || !exp->exp_obd) RETURN(-ENODEV); lov = &exp->exp_obd->u.lov; for (i = 0; i < lsm->lsm_stripe_count; i++) { struct lov_stripe_md submd; struct lov_oinfo *loi = lsm->lsm_oinfo[i]; if (!lov->lov_tgts[loi->loi_ost_idx]) { CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx); continue; } LASSERT_SEQ_IS_MDT(loi->loi_seq); submd.lsm_object_id = loi->loi_id; submd.lsm_object_seq = loi->loi_seq; submd.lsm_stripe_count = 0; rc = obd_change_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp, &submd, it, data); } RETURN(rc); } /* find any ldlm lock of the inode in lov * return 0 not find * 1 find one * < 0 error */ static int lov_find_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm, ldlm_iterator_t it, void *data) { struct lov_obd *lov; int rc = 0, i; ENTRY; ASSERT_LSM_MAGIC(lsm); if (!exp || !exp->exp_obd) RETURN(-ENODEV); lov = &exp->exp_obd->u.lov; for (i = 0; i < lsm->lsm_stripe_count; i++) { struct lov_stripe_md submd; struct lov_oinfo *loi = lsm->lsm_oinfo[i]; if (!lov->lov_tgts[loi->loi_ost_idx]) { CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx); continue; } LASSERT_SEQ_IS_MDT(loi->loi_seq); submd.lsm_object_id = loi->loi_id; submd.lsm_object_seq = loi->loi_seq; submd.lsm_stripe_count = 0; rc = obd_find_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp, &submd, it, data); if (rc != 0) RETURN(rc); } RETURN(rc); } static int lov_cancel(struct obd_export *exp, struct lov_stripe_md *lsm, __u32 mode, struct lustre_handle *lockh) { struct lov_request_set *set; struct obd_info oinfo; struct lov_request *req; cfs_list_t *pos; struct lov_obd *lov; struct lustre_handle *lov_lockhp; int err = 0, rc = 0; ENTRY; ASSERT_LSM_MAGIC(lsm); if (!exp || !exp->exp_obd) RETURN(-ENODEV); LASSERT_SEQ_IS_MDT(lsm->lsm_object_seq); LASSERT(lockh); lov = &exp->exp_obd->u.lov; rc = lov_prep_cancel_set(exp, &oinfo, lsm, mode, lockh, &set); if (rc) RETURN(rc); cfs_list_for_each (pos, &set->set_list) { req = cfs_list_entry(pos, struct lov_request, rq_link); lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe; rc = obd_cancel(lov->lov_tgts[req->rq_idx]->ltd_exp, req->rq_oi.oi_md, mode, lov_lockhp); rc = lov_update_common_set(set, req, rc); if (rc) { CERROR("error: cancel objid "LPX64" subobj " LPX64" on OST idx %d: rc = %d\n", lsm->lsm_object_id, req->rq_oi.oi_md->lsm_object_id, req->rq_idx, rc); err = rc; } } lov_fini_cancel_set(set); RETURN(err); } static int lov_cancel_unused(struct obd_export *exp, struct lov_stripe_md *lsm, ldlm_cancel_flags_t flags, void *opaque) { struct lov_obd *lov; int rc = 0, i; ENTRY; if (!exp || !exp->exp_obd) RETURN(-ENODEV); lov = &exp->exp_obd->u.lov; if (lsm == NULL) { for (i = 0; i < lov->desc.ld_tgt_count; i++) { int err; if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp) continue; err = obd_cancel_unused(lov->lov_tgts[i]->ltd_exp, NULL, flags, opaque); if (!rc) rc = err; } RETURN(rc); } ASSERT_LSM_MAGIC(lsm); LASSERT_SEQ_IS_MDT(lsm->lsm_object_seq); for (i = 0; i < lsm->lsm_stripe_count; i++) { struct lov_stripe_md submd; struct lov_oinfo *loi = lsm->lsm_oinfo[i]; int err; if (!lov->lov_tgts[loi->loi_ost_idx]) { CDEBUG(D_HA, "lov idx %d NULL\n", loi->loi_ost_idx); continue; } if (!lov->lov_tgts[loi->loi_ost_idx]->ltd_active) CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx); submd.lsm_object_id = loi->loi_id; submd.lsm_object_seq = loi->loi_seq; submd.lsm_stripe_count = 0; err = obd_cancel_unused(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp, &submd, flags, opaque); if (err && lov->lov_tgts[loi->loi_ost_idx]->ltd_active) { CERROR("error: cancel unused objid "LPX64" subobj "LPX64 " on OST idx %d: rc = %d\n", lsm->lsm_object_id, loi->loi_id, loi->loi_ost_idx, err); if (!rc) rc = err; } } RETURN(rc); } int lov_statfs_interpret(struct ptlrpc_request_set *rqset, void *data, int rc) { struct lov_request_set *lovset = (struct lov_request_set *)data; int err; ENTRY; if (rc) lovset->set_completes = 0; err = lov_fini_statfs_set(lovset); RETURN(rc ? rc : err); } static int lov_statfs_async(struct obd_device *obd, struct obd_info *oinfo, __u64 max_age, struct ptlrpc_request_set *rqset) { struct lov_request_set *set; struct lov_request *req; cfs_list_t *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); cfs_list_for_each (pos, &set->set_list) { struct obd_device *osc_obd; req = cfs_list_entry(pos, struct lov_request, rq_link); osc_obd = class_exp2obd(lov->lov_tgts[req->rq_idx]->ltd_exp); rc = obd_statfs_async(osc_obd, &req->rq_oi, max_age, rqset); if (rc) break; } if (rc || cfs_list_empty(&rqset->set_requests)) { int err; if (rc) 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(struct obd_device *obd, struct obd_statfs *osfs, __u64 max_age, __u32 flags) { struct ptlrpc_request_set *set = NULL; struct obd_info oinfo = { { { 0 } } }; int rc = 0; ENTRY; /* for obdclass we forbid using obd_statfs_rqset, but prefer using async * statfs requests */ set = ptlrpc_prep_set(); if (set == NULL) RETURN(-ENOMEM); oinfo.oi_osfs = osfs; oinfo.oi_flags = flags; rc = lov_statfs_async(obd, &oinfo, max_age, set); if (rc == 0) rc = ptlrpc_set_wait(set); ptlrpc_set_destroy(set); RETURN(rc); } static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len, void *karg, void *uarg) { struct obd_device *obddev = class_exp2obd(exp); struct lov_obd *lov = &obddev->u.lov; int i = 0, rc = 0, count = lov->desc.ld_tgt_count; struct obd_uuid *uuidp; ENTRY; switch (cmd) { case IOC_OBD_STATFS: { struct obd_ioctl_data *data = karg; struct obd_device *osc_obd; struct obd_statfs stat_buf = {0}; __u32 index; 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 (cfs_copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd), min((int) data->ioc_plen2, (int) sizeof(struct obd_uuid)))) RETURN(-EFAULT); /* got statfs data */ rc = obd_statfs(osc_obd, &stat_buf, cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS), 0); if (rc) RETURN(rc); if (cfs_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 (cfs_copy_to_user((void *)uarg, buf, len)) rc = -EFAULT; obd_ioctl_freedata(buf, len); break; } case LL_IOC_LOV_SETSTRIPE: rc = lov_setstripe(exp, len, karg, uarg); break; case LL_IOC_LOV_GETSTRIPE: rc = lov_getstripe(exp, karg, uarg); break; case LL_IOC_LOV_SETEA: rc = lov_setea(exp, karg, uarg); break; case OBD_IOC_QUOTACTL: { struct if_quotactl *qctl = karg; struct lov_tgt_desc *tgt = NULL; struct obd_quotactl *oqctl; if (qctl->qc_valid == QC_OSTIDX) { if (qctl->qc_idx < 0 || count <= qctl->qc_idx) RETURN(-EINVAL); tgt = lov->lov_tgts[qctl->qc_idx]; if (!tgt || !tgt->ltd_exp) RETURN(-EINVAL); } else if (qctl->qc_valid == QC_UUID) { for (i = 0; i < count; i++) { tgt = lov->lov_tgts[i]; if (!tgt || !obd_uuid_equals(&tgt->ltd_uuid, &qctl->obd_uuid)) continue; if (tgt->ltd_exp == NULL) RETURN(-EINVAL); break; } } else { RETURN(-EINVAL); } if (i >= count) RETURN(-EAGAIN); LASSERT(tgt && tgt->ltd_exp); OBD_ALLOC_PTR(oqctl); if (!oqctl) RETURN(-ENOMEM); QCTL_COPY(oqctl, qctl); rc = obd_quotactl(tgt->ltd_exp, oqctl); if (rc == 0) { QCTL_COPY(qctl, oqctl); qctl->qc_valid = QC_OSTIDX; qctl->obd_uuid = tgt->ltd_uuid; } OBD_FREE_PTR(oqctl); break; } default: { int set = 0; if (count == 0) RETURN(-ENOTTY); for (i = 0; i < count; i++) { int err; struct obd_device *osc_obd; /* OST was disconnected */ if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp) continue; /* ll_umount_begin() sets force flag but for lov, not * osc. Let's pass it through */ osc_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp); osc_obd->obd_force = obddev->obd_force; err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp, len, karg, uarg); if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) { RETURN(err); } else if (err) { if (lov->lov_tgts[i]->ltd_active) { CDEBUG(err == -ENOTTY ? D_IOCTL : D_WARNING, "iocontrol OSC %s on OST " "idx %d cmd %x: err = %d\n", lov_uuid2str(lov, i), i, cmd, err); if (!rc) rc = err; } } else { set = 1; } } if (!set && !rc) rc = -EIO; } } RETURN(rc); } #define FIEMAP_BUFFER_SIZE 4096 /** * Non-zero fe_logical indicates that this is a continuation FIEMAP * call. The local end offset and the device are sent in the first * fm_extent. This function calculates the stripe number from the index. * This function returns a stripe_no on which mapping is to be restarted. * * This function returns fm_end_offset which is the in-OST offset at which * mapping should be restarted. If fm_end_offset=0 is returned then caller * will re-calculate proper offset in next stripe. * Note that the first extent is passed to lov_get_info via the value field. * * \param fiemap fiemap request header * \param lsm striping information for the file * \param fm_start logical start of mapping * \param fm_end logical end of mapping * \param start_stripe starting stripe will be returned in this */ obd_size fiemap_calc_fm_end_offset(struct ll_user_fiemap *fiemap, struct lov_stripe_md *lsm, obd_size fm_start, obd_size fm_end, int *start_stripe) { obd_size local_end = fiemap->fm_extents[0].fe_logical; obd_off lun_start, lun_end; obd_size fm_end_offset; int stripe_no = -1, i; if (fiemap->fm_extent_count == 0 || fiemap->fm_extents[0].fe_logical == 0) return 0; /* Find out stripe_no from ost_index saved in the fe_device */ for (i = 0; i < lsm->lsm_stripe_count; i++) { if (lsm->lsm_oinfo[i]->loi_ost_idx == fiemap->fm_extents[0].fe_device) { stripe_no = i; break; } } /* If we have finished mapping on previous device, shift logical * offset to start of next device */ if ((lov_stripe_intersects(lsm, stripe_no, fm_start, fm_end, &lun_start, &lun_end)) != 0 && local_end < lun_end) { fm_end_offset = local_end; *start_stripe = stripe_no; } else { /* This is a special value to indicate that caller should * calculate offset in next stripe. */ fm_end_offset = 0; *start_stripe = (stripe_no + 1) % lsm->lsm_stripe_count; } return fm_end_offset; } /** * We calculate on which OST the mapping will end. If the length of mapping * is greater than (stripe_size * stripe_count) then the last_stripe will * will be one just before start_stripe. Else we check if the mapping * intersects each OST and find last_stripe. * This function returns the last_stripe and also sets the stripe_count * over which the mapping is spread * * \param lsm striping information for the file * \param fm_start logical start of mapping * \param fm_end logical end of mapping * \param start_stripe starting stripe of the mapping * \param stripe_count the number of stripes across which to map is returned * * \retval last_stripe return the last stripe of the mapping */ int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, obd_size fm_start, obd_size fm_end, int start_stripe, int *stripe_count) { int last_stripe; obd_off obd_start, obd_end; int i, j; if (fm_end - fm_start > lsm->lsm_stripe_size * lsm->lsm_stripe_count) { last_stripe = (start_stripe < 1 ? lsm->lsm_stripe_count - 1 : start_stripe - 1); *stripe_count = lsm->lsm_stripe_count; } else { for (j = 0, i = start_stripe; j < lsm->lsm_stripe_count; i = (i + 1) % lsm->lsm_stripe_count, j++) { if ((lov_stripe_intersects(lsm, i, fm_start, fm_end, &obd_start, &obd_end)) == 0) break; } *stripe_count = j; last_stripe = (start_stripe + j - 1) %lsm->lsm_stripe_count; } return last_stripe; } /** * Set fe_device and copy extents from local buffer into main return buffer. * * \param fiemap fiemap request header * \param lcl_fm_ext array of local fiemap extents to be copied * \param ost_index OST index to be written into the fm_device field for each extent * \param ext_count number of extents to be copied * \param current_extent where to start copying in main extent array */ void fiemap_prepare_and_copy_exts(struct ll_user_fiemap *fiemap, struct ll_fiemap_extent *lcl_fm_ext, int ost_index, unsigned int ext_count, int current_extent) { char *to; int ext; for (ext = 0; ext < ext_count; ext++) { lcl_fm_ext[ext].fe_device = ost_index; lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET; } /* Copy fm_extent's from fm_local to return buffer */ to = (char *)fiemap + fiemap_count_to_size(current_extent); memcpy(to, lcl_fm_ext, ext_count * sizeof(struct ll_fiemap_extent)); } /** * Break down the FIEMAP request and send appropriate calls to individual OSTs. * This also handles the restarting of FIEMAP calls in case mapping overflows * the available number of extents in single call. */ static int lov_fiemap(struct lov_obd *lov, __u32 keylen, void *key, __u32 *vallen, void *val, struct lov_stripe_md *lsm) { struct ll_fiemap_info_key *fm_key = key; struct ll_user_fiemap *fiemap = val; struct ll_user_fiemap *fm_local = NULL; struct ll_fiemap_extent *lcl_fm_ext; int count_local; unsigned int get_num_extents = 0; int ost_index = 0, actual_start_stripe, start_stripe; obd_size fm_start, fm_end, fm_length, fm_end_offset = 0; obd_size curr_loc; int current_extent = 0, rc = 0, i; int ost_eof = 0; /* EOF for object */ int ost_done = 0; /* done with required mapping for this OST? */ int last_stripe; int cur_stripe = 0, cur_stripe_wrap = 0, stripe_count; unsigned int buffer_size = FIEMAP_BUFFER_SIZE; if (lsm == NULL) GOTO(out, rc = 0); if (fiemap_count_to_size(fm_key->fiemap.fm_extent_count) < buffer_size) buffer_size = fiemap_count_to_size(fm_key->fiemap.fm_extent_count); OBD_ALLOC_LARGE(fm_local, buffer_size); if (fm_local == NULL) GOTO(out, rc = -ENOMEM); lcl_fm_ext = &fm_local->fm_extents[0]; count_local = fiemap_size_to_count(buffer_size); memcpy(fiemap, &fm_key->fiemap, sizeof(*fiemap)); fm_start = fiemap->fm_start; fm_length = fiemap->fm_length; /* Calculate start stripe, last stripe and length of mapping */ actual_start_stripe = start_stripe = lov_stripe_number(lsm, fm_start); fm_end = (fm_length == ~0ULL ? fm_key->oa.o_size : fm_start + fm_length - 1); /* If fm_length != ~0ULL but fm_start+fm_length-1 exceeds file size */ if (fm_end > fm_key->oa.o_size) fm_end = fm_key->oa.o_size; last_stripe = fiemap_calc_last_stripe(lsm, fm_start, fm_end, actual_start_stripe, &stripe_count); fm_end_offset = fiemap_calc_fm_end_offset(fiemap, lsm, fm_start, fm_end, &start_stripe); if (fiemap->fm_extent_count == 0) { get_num_extents = 1; count_local = 0; } /* Check each stripe */ for (cur_stripe = start_stripe, i = 0; i < stripe_count; i++, cur_stripe = (cur_stripe + 1) % lsm->lsm_stripe_count) { obd_size req_fm_len; /* Stores length of required mapping */ obd_size len_mapped_single_call; obd_off lun_start, lun_end, obd_object_end; unsigned int ext_count; cur_stripe_wrap = cur_stripe; /* Find out range of mapping on this stripe */ if ((lov_stripe_intersects(lsm, cur_stripe, fm_start, fm_end, &lun_start, &obd_object_end)) == 0) continue; /* If this is a continuation FIEMAP call and we are on * starting stripe then lun_start needs to be set to * fm_end_offset */ if (fm_end_offset != 0 && cur_stripe == start_stripe) lun_start = fm_end_offset; if (fm_length != ~0ULL) { /* Handle fm_start + fm_length overflow */ if (fm_start + fm_length < fm_start) fm_length = ~0ULL - fm_start; lun_end = lov_size_to_stripe(lsm, fm_start + fm_length, cur_stripe); } else { lun_end = ~0ULL; } if (lun_start == lun_end) continue; req_fm_len = obd_object_end - lun_start; fm_local->fm_length = 0; len_mapped_single_call = 0; /* If the output buffer is very large and the objects have many * extents we may need to loop on a single OST repeatedly */ ost_eof = 0; ost_done = 0; do { if (get_num_extents == 0) { /* Don't get too many extents. */ if (current_extent + count_local > fiemap->fm_extent_count) count_local = fiemap->fm_extent_count - current_extent; } lun_start += len_mapped_single_call; fm_local->fm_length = req_fm_len - len_mapped_single_call; req_fm_len = fm_local->fm_length; fm_local->fm_extent_count = count_local; fm_local->fm_mapped_extents = 0; fm_local->fm_flags = fiemap->fm_flags; fm_key->oa.o_id = lsm->lsm_oinfo[cur_stripe]->loi_id; fm_key->oa.o_seq = lsm->lsm_oinfo[cur_stripe]->loi_seq; ost_index = lsm->lsm_oinfo[cur_stripe]->loi_ost_idx; if (ost_index < 0 || ost_index >=lov->desc.ld_tgt_count) GOTO(out, rc = -EINVAL); /* If OST is inactive, return extent with UNKNOWN flag */ if (!lov->lov_tgts[ost_index]->ltd_active) { fm_local->fm_flags |= FIEMAP_EXTENT_LAST; fm_local->fm_mapped_extents = 1; lcl_fm_ext[0].fe_logical = lun_start; lcl_fm_ext[0].fe_length = obd_object_end - lun_start; lcl_fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN; goto inactive_tgt; } fm_local->fm_start = lun_start; fm_local->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER; memcpy(&fm_key->fiemap, fm_local, sizeof(*fm_local)); *vallen=fiemap_count_to_size(fm_local->fm_extent_count); rc = obd_get_info(lov->lov_tgts[ost_index]->ltd_exp, keylen, key, vallen, fm_local, lsm); if (rc != 0) GOTO(out, rc); inactive_tgt: ext_count = fm_local->fm_mapped_extents; if (ext_count == 0) { ost_done = 1; /* If last stripe has hole at the end, * then we need to return */ if (cur_stripe_wrap == last_stripe) { fiemap->fm_mapped_extents = 0; goto finish; } break; } /* If we just need num of extents then go to next device */ if (get_num_extents) { current_extent += ext_count; break; } len_mapped_single_call = lcl_fm_ext[ext_count-1].fe_logical - lun_start + lcl_fm_ext[ext_count - 1].fe_length; /* Have we finished mapping on this device? */ if (req_fm_len <= len_mapped_single_call) ost_done = 1; /* Clear the EXTENT_LAST flag which can be present on * last extent */ if (lcl_fm_ext[ext_count-1].fe_flags & FIEMAP_EXTENT_LAST) lcl_fm_ext[ext_count - 1].fe_flags &= ~FIEMAP_EXTENT_LAST; curr_loc = lov_stripe_size(lsm, lcl_fm_ext[ext_count - 1].fe_logical+ lcl_fm_ext[ext_count - 1].fe_length, cur_stripe); if (curr_loc >= fm_key->oa.o_size) ost_eof = 1; fiemap_prepare_and_copy_exts(fiemap, lcl_fm_ext, ost_index, ext_count, current_extent); current_extent += ext_count; /* Ran out of available extents? */ if (current_extent >= fiemap->fm_extent_count) goto finish; } while (ost_done == 0 && ost_eof == 0); if (cur_stripe_wrap == last_stripe) goto finish; } finish: /* Indicate that we are returning device offsets unless file just has * single stripe */ if (lsm->lsm_stripe_count > 1) fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER; if (get_num_extents) goto skip_last_device_calc; /* Check if we have reached the last stripe and whether mapping for that * stripe is done. */ if (cur_stripe_wrap == last_stripe) { if (ost_done || ost_eof) fiemap->fm_extents[current_extent - 1].fe_flags |= FIEMAP_EXTENT_LAST; } skip_last_device_calc: fiemap->fm_mapped_extents = current_extent; out: OBD_FREE_LARGE(fm_local, buffer_size); return rc; } static int lov_get_info(struct obd_export *exp, __u32 keylen, void *key, __u32 *vallen, void *val, struct lov_stripe_md *lsm) { struct obd_device *obddev = class_exp2obd(exp); struct lov_obd *lov = &obddev->u.lov; int i, rc; ENTRY; if (!vallen || !val) RETURN(-EFAULT); obd_getref(obddev); if (KEY_IS(KEY_LOCK_TO_STRIPE)) { struct { char name[16]; struct ldlm_lock *lock; } *data = key; struct ldlm_res_id *res_id = &data->lock->l_resource->lr_name; struct lov_oinfo *loi; __u32 *stripe = val; if (*vallen < sizeof(*stripe)) GOTO(out, rc = -EFAULT); *vallen = sizeof(*stripe); /* XXX This is another one of those bits that will need to * change if we ever actually support nested LOVs. It uses * the lock's export to find out which stripe it is. */ /* XXX - it's assumed all the locks for deleted OSTs have * been cancelled. Also, the export for deleted OSTs will * be NULL and won't match the lock's export. */ for (i = 0; i < lsm->lsm_stripe_count; i++) { loi = lsm->lsm_oinfo[i]; if (!lov->lov_tgts[loi->loi_ost_idx]) continue; if (lov->lov_tgts[loi->loi_ost_idx]->ltd_exp == data->lock->l_conn_export && osc_res_name_eq(loi->loi_id, loi->loi_seq, res_id)) { *stripe = i; GOTO(out, rc = 0); } } LDLM_ERROR(data->lock, "lock on inode without such object"); dump_lsm(D_ERROR, lsm); GOTO(out, rc = -ENXIO); } else if (KEY_IS(KEY_LAST_ID)) { struct obd_id_info *info = val; __u32 size = sizeof(obd_id); struct lov_tgt_desc *tgt; LASSERT(*vallen == sizeof(struct obd_id_info)); tgt = lov->lov_tgts[info->idx]; if (!tgt || !tgt->ltd_active) GOTO(out, rc = -ESRCH); rc = obd_get_info(tgt->ltd_exp, keylen, key, &size, info->data, NULL); GOTO(out, rc = 0); } else if (KEY_IS(KEY_LOVDESC)) { struct lov_desc *desc_ret = val; *desc_ret = lov->desc; GOTO(out, rc = 0); } else if (KEY_IS(KEY_FIEMAP)) { rc = lov_fiemap(lov, keylen, key, vallen, val, lsm); GOTO(out, rc); } else if (KEY_IS(KEY_CONNECT_FLAG)) { struct lov_tgt_desc *tgt; __u64 ost_idx = *((__u64*)val); LASSERT(*vallen == sizeof(__u64)); LASSERT(ost_idx < lov->desc.ld_tgt_count); tgt = lov->lov_tgts[ost_idx]; if (!tgt || !tgt->ltd_exp) GOTO(out, rc = -ESRCH); *((__u64*)val) = tgt->ltd_exp->exp_connect_flags; GOTO(out, rc = 0); } rc = -EINVAL; out: obd_putref(obddev); RETURN(rc); } static int lov_set_info_async(struct obd_export *exp, obd_count keylen, void *key, obd_count vallen, void *val, struct ptlrpc_request_set *set) { struct obd_device *obddev = class_exp2obd(exp); struct lov_obd *lov = &obddev->u.lov; obd_count count; int i, rc = 0, err; struct lov_tgt_desc *tgt; unsigned incr, check_uuid, do_inactive, no_set; unsigned next_id = 0, mds_con = 0, capa = 0; ENTRY; incr = check_uuid = do_inactive = no_set = 0; if (set == NULL) { no_set = 1; set = ptlrpc_prep_set(); if (!set) RETURN(-ENOMEM); } obd_getref(obddev); count = lov->desc.ld_tgt_count; if (KEY_IS(KEY_NEXT_ID)) { count = vallen / sizeof(struct obd_id_info); vallen = sizeof(obd_id); incr = sizeof(struct obd_id_info); do_inactive = 1; next_id = 1; } else if (KEY_IS(KEY_CHECKSUM)) { do_inactive = 1; } else if (KEY_IS(KEY_EVICT_BY_NID)) { /* use defaults: do_inactive = incr = 0; */ } else if (KEY_IS(KEY_MDS_CONN)) { mds_con = 1; } else if (KEY_IS(KEY_CAPA_KEY)) { capa = 1; } 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(tgt->ltd_exp, keylen, key, sizeof(int), &mgi->group, set); } else if (next_id) { err = obd_set_info_async(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(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(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); } int lov_test_and_clear_async_rc(struct lov_stripe_md *lsm) { int i, rc = 0; ENTRY; for (i = 0; i < lsm->lsm_stripe_count; i++) { struct lov_oinfo *loi = lsm->lsm_oinfo[i]; if (loi->loi_ar.ar_rc && !rc) rc = loi->loi_ar.ar_rc; loi->loi_ar.ar_rc = 0; } RETURN(rc); } EXPORT_SYMBOL(lov_test_and_clear_async_rc); static int lov_extent_calc(struct obd_export *exp, struct lov_stripe_md *lsm, int cmd, __u64 *offset) { __u32 ssize = lsm->lsm_stripe_size; __u64 start; start = *offset; do_div(start, ssize); start = start * ssize; CDEBUG(D_DLMTRACE, "offset "LPU64", stripe %u, start "LPU64 ", end "LPU64"\n", *offset, ssize, start, start + ssize - 1); if (cmd == OBD_CALC_STRIPE_END) { *offset = start + ssize - 1; } else if (cmd == OBD_CALC_STRIPE_START) { *offset = start; } else { LBUG(); } RETURN(0); } void lov_stripe_lock(struct lov_stripe_md *md) { LASSERT(md->lsm_lock_owner != cfs_curproc_pid()); cfs_spin_lock(&md->lsm_lock); LASSERT(md->lsm_lock_owner == 0); md->lsm_lock_owner = cfs_curproc_pid(); } EXPORT_SYMBOL(lov_stripe_lock); void lov_stripe_unlock(struct lov_stripe_md *md) { LASSERT(md->lsm_lock_owner == cfs_curproc_pid()); md->lsm_lock_owner = 0; cfs_spin_unlock(&md->lsm_lock); } EXPORT_SYMBOL(lov_stripe_unlock); struct obd_ops lov_obd_ops = { .o_owner = THIS_MODULE, .o_setup = lov_setup, .o_precleanup = lov_precleanup, .o_cleanup = lov_cleanup, //.o_process_config = lov_process_config, .o_connect = lov_connect, .o_disconnect = lov_disconnect, .o_statfs = lov_statfs, .o_statfs_async = lov_statfs_async, .o_packmd = lov_packmd, .o_unpackmd = lov_unpackmd, .o_create = lov_create, .o_destroy = lov_destroy, .o_getattr = lov_getattr, .o_getattr_async = lov_getattr_async, .o_setattr = lov_setattr, .o_setattr_async = lov_setattr_async, .o_brw = lov_brw, .o_merge_lvb = lov_merge_lvb, .o_adjust_kms = lov_adjust_kms, .o_punch = lov_punch, .o_sync = lov_sync, .o_enqueue = lov_enqueue, .o_change_cbdata = lov_change_cbdata, .o_find_cbdata = lov_find_cbdata, .o_cancel = lov_cancel, .o_cancel_unused = lov_cancel_unused, .o_iocontrol = lov_iocontrol, .o_get_info = lov_get_info, .o_set_info_async = lov_set_info_async, .o_extent_calc = lov_extent_calc, .o_llog_init = lov_llog_init, .o_llog_finish = lov_llog_finish, .o_notify = lov_notify, .o_pool_new = lov_pool_new, .o_pool_rem = lov_pool_remove, .o_pool_add = lov_pool_add, .o_pool_del = lov_pool_del, .o_getref = lov_getref, .o_putref = lov_putref, }; static quota_interface_t *quota_interface; extern quota_interface_t lov_quota_interface; cfs_mem_cache_t *lov_oinfo_slab; extern struct lu_kmem_descr lov_caches[]; int __init lov_init(void) { struct lprocfs_static_vars lvars = { 0 }; int rc, rc2; 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_CONSOLE, "Lustre LOV module (%p).\n", &lov_caches); rc = lu_kmem_init(lov_caches); if (rc) return rc; lov_oinfo_slab = cfs_mem_cache_create("lov_oinfo", sizeof(struct lov_oinfo), 0, CFS_SLAB_HWCACHE_ALIGN); if (lov_oinfo_slab == NULL) { lu_kmem_fini(lov_caches); return -ENOMEM; } lprocfs_lov_init_vars(&lvars); cfs_request_module("lquota"); quota_interface = PORTAL_SYMBOL_GET(lov_quota_interface); init_obd_quota_ops(quota_interface, &lov_obd_ops); rc = class_register_type(&lov_obd_ops, NULL, lvars.module_vars, LUSTRE_LOV_NAME, &lov_device_type); if (rc) { if (quota_interface) PORTAL_SYMBOL_PUT(lov_quota_interface); rc2 = cfs_mem_cache_destroy(lov_oinfo_slab); LASSERT(rc2 == 0); lu_kmem_fini(lov_caches); } RETURN(rc); } #ifdef __KERNEL__ static void /*__exit*/ lov_exit(void) { int rc; lu_device_type_fini(&lov_device_type); lu_kmem_fini(lov_caches); if (quota_interface) PORTAL_SYMBOL_PUT(lov_quota_interface); class_unregister_type(LUSTRE_LOV_NAME); rc = cfs_mem_cache_destroy(lov_oinfo_slab); LASSERT(rc == 0); } MODULE_AUTHOR("Sun Microsystems, Inc. "); MODULE_DESCRIPTION("Lustre Logical Object Volume OBD driver"); MODULE_LICENSE("GPL"); cfs_module(lov, LUSTRE_VERSION_STRING, lov_init, lov_exit); #endif