-
Bobi Jam authoredb=13375 i=shadow, panda Descriptoin: make lov_create() will not stuck in obd_statfs_rqset() Details : If an OST is down the MDS will hang indefinitely in obd_statfs_rqset() waiting for the statfs data. While for MDS QOS usage of statfs, it should not stuck in waiting.Bobi Jam authoredb=13375 i=shadow, panda Descriptoin: make lov_create() will not stuck in obd_statfs_rqset() Details : If an OST is down the MDS will hang indefinitely in obd_statfs_rqset() waiting for the statfs data. While for MDS QOS usage of statfs, it should not stuck in waiting.
lov_obd.c 97.81 KiB
/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
* Copyright (C) 2002-2006 Cluster File Systems, Inc.
* Author: Phil Schwan <phil@clusterfs.com>
* Peter Braam <braam@clusterfs.com>
* Mike Shaver <shaver@clusterfs.com>
* Nathan Rutman <nathan@clusterfs.com>
*
* This file is part of the Lustre file system, http://www.lustre.org
* Lustre is a trademark of Cluster File Systems, Inc.
*
* You may have signed or agreed to another license before downloading
* this software. If so, you are bound by the terms and conditions
* of that agreement, and the following does not apply to you. See the
* LICENSE file included with this distribution for more information.
*
* If you did not agree to a different license, then this copy of Lustre
* is open source software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* In either case, Lustre 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
* license text for more details.
*/
#ifndef EXPORT_SYMTAB
# define EXPORT_SYMTAB
#endif
#define DEBUG_SUBSYSTEM S_LOV
#ifdef __KERNEL__
#include <libcfs/libcfs.h>
#else
#include <liblustre.h>
#endif
#include <obd_support.h>
#include <lustre_lib.h>
#include <lustre_net.h>
#include <lustre/lustre_idl.h>
#include <lustre_dlm.h>
#include <lustre_mds.h>
#include <lustre_debug.h>
#include <obd_class.h>
#include <obd_lov.h>
#include <obd_ost.h>
#include <lprocfs_status.h>
#include <lustre_param.h>
#include <lustre_cache.h>
#include "lov_internal.h"
/* Keep a refcount of lov->tgt usage to prevent racing with addition/deletion.
Any function that expects lov_tgts to remain stationary must take a ref. */
void lov_getref(struct obd_device *obd)
{
struct lov_obd *lov = &obd->u.lov;
/* nobody gets through here until lov_putref is done */
mutex_down(&lov->lov_lock);
atomic_inc(&lov->lov_refcount);
mutex_up(&lov->lov_lock);
return;
}
static void __lov_del_obd(struct obd_device *obd, __u32 index);
void lov_putref(struct obd_device *obd)
{
struct lov_obd *lov = &obd->u.lov;
mutex_down(&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) {
int i;
CDEBUG(D_CONFIG, "destroying %d lov targets\n",
lov->lov_death_row);
for (i = 0; i < lov->desc.ld_tgt_count; i++) {
if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_reap)
continue;
/* Disconnect and delete from list */
__lov_del_obd(obd, i);
lov->lov_death_row--;
}
}
mutex_up(&lov->lov_lock);
}
static int lov_register_page_removal_cb(struct obd_export *exp,
obd_page_removal_cb_t func,
obd_pin_extent_cb pin_cb)
{
struct lov_obd *lov = &exp->exp_obd->u.lov;
int i, rc = 0;
if (lov->lov_page_removal_cb && lov->lov_page_removal_cb != func)
return -EBUSY;
if (lov->lov_page_pin_cb && lov->lov_page_pin_cb != pin_cb)
return -EBUSY;
for (i = 0; i < lov->desc.ld_tgt_count; i++) {
if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
continue;
rc |= obd_register_page_removal_cb(lov->lov_tgts[i]->ltd_exp,
func, pin_cb);
}
lov->lov_page_removal_cb = func;
lov->lov_page_pin_cb = pin_cb;
return rc;
}
static int lov_unregister_page_removal_cb(struct obd_export *exp,
obd_page_removal_cb_t func)
{
struct lov_obd *lov = &exp->exp_obd->u.lov;
int i, rc = 0;
if (lov->lov_page_removal_cb && lov->lov_page_removal_cb != func)
return -EINVAL;
lov->lov_page_removal_cb = NULL;
lov->lov_page_pin_cb = NULL;
for (i = 0; i < lov->desc.ld_tgt_count; i++) {
if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
continue;
rc |= obd_unregister_page_removal_cb(lov->lov_tgts[i]->ltd_exp,
func);
}
return rc;
}
static int lov_register_lock_cancel_cb(struct obd_export *exp,
obd_lock_cancel_cb func){
struct lov_obd *lov = &exp->exp_obd->u.lov;
int i, rc = 0;
if (lov->lov_lock_cancel_cb && lov->lov_lock_cancel_cb != func)
return -EBUSY;
for (i = 0; i < lov->desc.ld_tgt_count; i++) {
if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
continue;
rc |= obd_register_lock_cancel_cb(lov->lov_tgts[i]->ltd_exp,
func);
}
lov->lov_lock_cancel_cb = func;
return rc;
}
static int lov_unregister_lock_cancel_cb(struct obd_export *exp,
obd_lock_cancel_cb func)
{
struct lov_obd *lov = &exp->exp_obd->u.lov;
int i, rc = 0;
if (lov->lov_lock_cancel_cb && lov->lov_lock_cancel_cb != func)
return -EINVAL;
for (i = 0; i < lov->desc.ld_tgt_count; i++) {
if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
continue;
rc |= obd_unregister_lock_cancel_cb(lov->lov_tgts[i]->ltd_exp,
func);
}
lov->lov_lock_cancel_cb = NULL;
return rc;
}
#define MAX_STRING_SIZE 128
static 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;
struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
struct lustre_handle conn = {0, };
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 = class_find_client_obd(&tgt_uuid, LUSTRE_OSC_NAME,
&obd->obd_uuid);
if (!tgt_obd) {
CERROR("Target %s not attached\n", obd_uuid2str(&tgt_uuid));
RETURN(-EINVAL);
}
if (!tgt_obd->obd_set_up) {
CERROR("Target %s not set up\n", obd_uuid2str(&tgt_uuid));
RETURN(-EINVAL); }
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);
}
if (imp->imp_invalid) {
CERROR("not connecting OSC %s; administratively "
"disabled\n", obd_uuid2str(&tgt_uuid));
rc = obd_register_observer(tgt_obd, obd);
if (rc) {
CERROR("Target %s register_observer error %d; "
"will not be able to reactivate\n",
obd_uuid2str(&tgt_uuid), rc);
}
RETURN(0);
}
rc = obd_connect(&conn, tgt_obd, &lov_osc_uuid, data, NULL);
if (rc) {
CERROR("Target %s connect error %d\n",
obd_uuid2str(&tgt_uuid), rc);
RETURN(rc);
}
lov->lov_tgts[index]->ltd_exp = class_conn2export(&conn);
if (!lov->lov_tgts[index]->ltd_exp) {
CERROR("Target %s: null export!\n", obd_uuid2str(&tgt_uuid));
RETURN(-ENODEV);
}
rc = obd_register_page_removal_cb(lov->lov_tgts[index]->ltd_exp,
lov->lov_page_removal_cb,
lov->lov_page_pin_cb);
if (rc) {
obd_disconnect(lov->lov_tgts[index]->ltd_exp);
lov->lov_tgts[index]->ltd_exp = NULL;
RETURN(rc);
}
rc = obd_register_lock_cancel_cb(lov->lov_tgts[index]->ltd_exp,
lov->lov_lock_cancel_cb);
if (rc) {
obd_unregister_page_removal_cb(lov->lov_tgts[index]->ltd_exp,
lov->lov_page_removal_cb);
obd_disconnect(lov->lov_tgts[index]->ltd_exp);
lov->lov_tgts[index]->ltd_exp = NULL;
RETURN(rc);
}
rc = obd_register_observer(tgt_obd, obd);
if (rc) {
CERROR("Target %s register_observer error %d\n",
obd_uuid2str(&tgt_uuid), rc);
obd_unregister_lock_cancel_cb(lov->lov_tgts[index]->ltd_exp,
lov->lov_lock_cancel_cb);
obd_unregister_page_removal_cb(lov->lov_tgts[index]->ltd_exp,
lov->lov_page_removal_cb);
obd_disconnect(lov->lov_tgts[index]->ltd_exp);
lov->lov_tgts[index]->ltd_exp = NULL; RETURN(rc);
}
lov->lov_tgts[index]->ltd_reap = 0;
if (activate) {
lov->lov_tgts[index]->ltd_active = 1;
lov->desc.ld_active_tgt_count++;
lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 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 = class_conn2obd(&conn);
cfs_proc_dir_entry_t *osc_symlink;
char name[MAX_STRING_SIZE];
LASSERT(osc_obd != NULL);
LASSERT(osc_obd->obd_magic == OBD_DEVICE_MAGIC);
LASSERT(osc_obd->obd_type->typ_name != NULL);
snprintf(name, MAX_STRING_SIZE, "../../../%s/%s",
osc_obd->obd_type->typ_name,
osc_obd->obd_name);
osc_symlink = proc_symlink(osc_obd->obd_name, lov_proc_dir,
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(struct lustre_handle *conn, 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;
int i, rc;
ENTRY;
CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
rc = class_connect(conn, obd, cluuid);
if (rc)
RETURN(rc);
/* 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_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, lov->lov_tgts[i]->ltd_activate,
&lov->lov_ocd);
if (rc) {
CERROR("%s: lov connect tgt %d failed: %d\n",
obd->obd_name, i, rc);
continue;
}
}
lov_putref(obd);
RETURN(0);
}
static int lov_disconnect_obd(struct obd_device *obd, __u32 index)
{
cfs_proc_dir_entry_t *lov_proc_dir;
struct lov_obd *lov = &obd->u.lov;
struct obd_device *osc_obd =
class_exp2obd(lov->lov_tgts[index]->ltd_exp);
int rc;
ENTRY;
CDEBUG(D_CONFIG, "%s: disconnecting target %s\n",
obd->obd_name, osc_obd->obd_name);
obd_unregister_lock_cancel_cb(lov->lov_tgts[index]->ltd_exp,
lov->lov_lock_cancel_cb);
obd_unregister_page_removal_cb(lov->lov_tgts[index]->ltd_exp,
lov->lov_page_removal_cb);
if (lov->lov_tgts[index]->ltd_active) {
lov->lov_tgts[index]->ltd_active = 0;
lov->desc.ld_active_tgt_count--;
lov->lov_tgts[index]->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 (obd->obd_no_recov) {
/* 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.
*/
if (osc_obd)
osc_obd->obd_no_recov = 1;
}
obd_register_observer(osc_obd, NULL);
rc = obd_disconnect(lov->lov_tgts[index]->ltd_exp);
if (rc) {
CERROR("Target %s disconnect error %d\n",
lov_uuid2str(lov, index), rc);
rc = 0;
}
qos_del_tgt(obd, index);
lov->lov_tgts[index]->ltd_exp = NULL;
RETURN(0);
}
static int lov_del_target(struct obd_device *obd, __u32 index,
struct obd_uuid *uuidp, int gen);
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 */
lov_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);
}
}
lov_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 (!)
*/
static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
int activate)
{
struct lov_obd *lov = &obd->u.lov;
struct lov_tgt_desc *tgt;
int i, rc = 0;
ENTRY;
CDEBUG(D_INFO, "Searching in lov %p for uuid %s (activate=%d)\n",
lov, uuid->uuid, activate);
lov_getref(obd);
for (i = 0; i < lov->desc.ld_tgt_count; i++) {
tgt = lov->lov_tgts[i];
if (!tgt || !tgt->ltd_exp)
continue;
CDEBUG(D_INFO, "lov idx %d is %s conn "LPX64"\n",
i, obd_uuid2str(&tgt->ltd_uuid),
tgt->ltd_exp->exp_handle.h_cookie); if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
break;
}
if (i == lov->desc.ld_tgt_count)
GOTO(out, rc = -EINVAL);
if (lov->lov_tgts[i]->ltd_active == activate) {
CDEBUG(D_INFO, "OSC %s already %sactive!\n", uuid->uuid,
activate ? "" : "in");
GOTO(out, rc);
}
CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n", obd_uuid2str(uuid),
activate ? "" : "in");
lov->lov_tgts[i]->ltd_active = activate;
if (activate) {
lov->desc.ld_active_tgt_count++;
lov->lov_tgts[i]->ltd_exp->exp_obd->obd_inactive = 0;
} else {
lov->desc.ld_active_tgt_count--;
lov->lov_tgts[i]->ltd_exp->exp_obd->obd_inactive = 1;
}
/* remove any old qos penalty */
lov->lov_tgts[i]->ltd_qos.ltq_penalty = 0;
out:
lov_putref(obd);
RETURN(rc);
}
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) {
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 == OBD_NOTIFY_ACTIVE);
if (rc) {
CERROR("%sactivation of %s failed: %d\n",
(ev == OBD_NOTIFY_ACTIVE) ? "" : "de",
obd_uuid2str(uuid), rc);
RETURN(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) */
struct lov_obd *lov = &obd->u.lov; struct obd_device *tgt_obd;
int i;
lov_getref(obd);
for (i = 0; i < lov->desc.ld_tgt_count; i++) {
if (!lov->lov_tgts[i])
continue;
tgt_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
rc = obd_notify_observer(obd, tgt_obd, ev, data);
if (rc) {
CERROR("%s: notify %s of %s failed %d\n",
obd->obd_name,
obd->obd_observer->obd_name,
tgt_obd->obd_name, rc);
break;
}
}
lov_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;
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);
}
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);
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) {
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) {
mutex_up(&lov->lov_lock);
RETURN(-ENOMEM);
}
memset(tgt, 0, sizeof(*tgt));
tgt->ltd_uuid = *uuidp;
/* 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_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);
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);
}
lov_getref(obd);
rc = lov_connect_obd(obd, index, active, &lov->lov_ocd);
if (rc)
GOTO(out, rc);
rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
active ? OBD_NOTIFY_ACTIVE : 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);
}
lov_putref(obd);
RETURN(rc);
}
/* Schedule a target for deletion */
static 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);
}
lov_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 lov_putref */
out:
lov_putref(obd);
RETURN(rc);
}
/* We are holding lov_lock */
static void __lov_del_obd(struct obd_device *obd, __u32 index)
{
struct lov_obd *lov = &obd->u.lov;
struct obd_device *osc_obd;
struct lov_tgt_desc *tgt = lov->lov_tgts[index];
LASSERT(tgt);
LASSERT(tgt->ltd_reap);
osc_obd = class_exp2obd(tgt->ltd_exp);
CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
lov_uuid2str(lov, index),
osc_obd ? osc_obd->obd_name : "<no obd>");
if (tgt->ltd_exp)
lov_disconnect_obd(obd, index);
/* 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->lov_tgts[index] = NULL;
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) {
/* Use lov's force/fail flags. */
osc_obd->obd_force = obd->obd_force;
osc_obd->obd_fail = obd->obd_fail;
class_manual_cleanup(osc_obd);
}
}
void lov_fix_desc(struct lov_desc *desc)
{
if (desc->ld_default_stripe_size < PTLRPC_MAX_BRW_SIZE) {
LCONSOLE_WARN("Increasing default stripe size to min %u\n",
PTLRPC_MAX_BRW_SIZE);
desc->ld_default_stripe_size = PTLRPC_MAX_BRW_SIZE;
} else if (desc->ld_default_stripe_size & (LOV_MIN_STRIPE_SIZE - 1)) {
desc->ld_default_stripe_size &= ~(LOV_MIN_STRIPE_SIZE - 1);
LCONSOLE_WARN("Changing default stripe size to "LPU64" (a "
"multiple of %u)\n",
desc->ld_default_stripe_size,LOV_MIN_STRIPE_SIZE);
}
if (desc->ld_default_stripe_count == 0)
desc->ld_default_stripe_count = 1;
/* from lov_setstripe */
if ((desc->ld_pattern != 0) &&
(desc->ld_pattern != LOV_PATTERN_RAID0)) {
LCONSOLE_WARN("Unknown stripe pattern: %#x\n",desc->ld_pattern);
desc->ld_pattern = 0;
}
/* fix qos_maxage */
if (desc->ld_qos_maxage == 0)
desc->ld_qos_maxage = QOS_DEFAULT_MAXAGE;
}
static int lov_setup(struct obd_device *obd, obd_count len, void *buf)
{
struct lprocfs_static_vars lvars = { 0 };
struct lustre_cfg *lcfg = buf;
struct lov_desc *desc;
struct lov_obd *lov = &obd->u.lov;
int count;
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);
/* Because of 64-bit divide/mod operations only work with a 32-bit
* divisor in a 32-bit kernel, we cannot support a stripe width
* of 4GB or larger on 32-bit CPUs. */
count = desc->ld_default_stripe_count;
if ((count > 0 ? count : desc->ld_tgt_count) *
desc->ld_default_stripe_size > 0xffffffff) {
CERROR("LOV: stripe width "LPU64"x%u > 4294967295 bytes\n", desc->ld_default_stripe_size, count);
RETURN(-EINVAL);
}
desc->ld_active_tgt_count = 0;
lov->desc = *desc;
lov->lov_tgt_size = 0;
sema_init(&lov->lov_lock, 1);
atomic_set(&lov->lov_refcount, 0);
INIT_LIST_HEAD(&lov->lov_qos.lq_oss_list);
init_rwsem(&lov->lov_qos.lq_rw_sem);
lov->lov_qos.lq_dirty = 1;
lov->lov_qos.lq_dirty_rr = 1;
lov->lov_qos.lq_reset = 1;
/* Default priority is toward free space balance */
lov->lov_qos.lq_prio_free = 232;
lprocfs_lov_init_vars(&lvars);
lprocfs_obd_setup(obd, lvars.obd_vars);
#ifdef LPROCFS
{
cfs_proc_dir_entry_t *entry;
entry = create_proc_entry("target_obd", 0444,
obd->obd_proc_entry);
if (entry != NULL) {
entry->proc_fops = &lov_proc_target_fops;
entry->data = obd;
}
}
#endif
RETURN(0);
}
static int lov_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
{
int rc = 0;
ENTRY;
switch (stage) {
case OBD_CLEANUP_EARLY: {
struct lov_obd *lov = &obd->u.lov;
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:
break;
case OBD_CLEANUP_SELF_EXP:
rc = obd_llog_finish(obd, 0);
if (rc != 0)
CERROR("failed to cleanup llogging subsystems\n");
break;
case OBD_CLEANUP_OBD:
break;
}
RETURN(rc);
}
static int lov_cleanup(struct obd_device *obd)
{
struct lov_obd *lov = &obd->u.lov;
lprocfs_obd_cleanup(obd); if (lov->lov_tgts) {
int i;
for (i = 0; i < lov->desc.ld_tgt_count; i++) {
if (lov->lov_tgts[i]) {
/* Inactive targets may never have connected */
if (lov->lov_tgts[i]->ltd_active ||
atomic_read(&lov->lov_refcount))
/* We should never get here - these
should have been removed in the
disconnect. */
CERROR("lov tgt %d not cleaned!"
" deathrow=%d, lovrc=%d\n",
i, lov->lov_death_row,
atomic_read(&lov->lov_refcount));
lov_del_target(obd, i, 0, 0);
}
}
OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) *
lov->lov_tgt_size);
lov->lov_tgt_size = 0;
}
if (lov->lov_qos.lq_rr_size)
OBD_FREE(lov->lov_qos.lq_rr_array, lov->lov_qos.lq_rr_size);
RETURN(0);
}
static int lov_process_config(struct obd_device *obd, obd_count len, void *buf)
{
struct lustre_cfg *lcfg = buf;
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", &index) != 1)
GOTO(out, rc = -EINVAL);
if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", &gen) != 1)
GOTO(out, rc = -EINVAL);
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);
GOTO(out, rc);
}
default: {
CERROR("Unknown command: %d\n", lcfg->lcfg_command);
GOTO(out, rc = -EINVAL);
}
}
out:
RETURN(rc);
}
#ifndef log2
#define log2(n) 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 (src_oa->o_valid & OBD_MD_FLINLINE) {
ost_uuid = (struct obd_uuid *)src_oa->o_inline;
CDEBUG(D_HA, "clearing orphans only for %s\n",
ost_uuid->uuid);
}
lov_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);
if (ost_uuid)
break;
}
lov_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 obd_statfs osfs;
__u64 maxage;
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);
/* 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);
RETURN(rc);
}
maxage = cfs_time_shift_64(-lov->desc.ld_qos_maxage);
obd_statfs_rqset(exp->exp_obd, &osfs, maxage, OBD_STATFS_NODELAY);
rc = lov_prep_create_set(exp, &oinfo, ea, src_oa, oti, &set);
if (rc)
RETURN(rc);
list_for_each_entry(req, &set->set_list, rq_link) {
/* XXX: LOV STACKING: use real "obj_mdp" sub-data */
rc = obd_create(lov->lov_tgts[req->rq_idx]->ltd_exp,
req->rq_oi.oi_oa, &req->rq_oi.oi_md, oti);
lov_update_create_set(set, req, rc);
}
rc = lov_fini_create_set(set, ea);
RETURN(rc);
}
#define ASSERT_LSM_MAGIC(lsmp) \
do { \
LASSERT((lsmp) != NULL); \
LASSERTF(((lsmp)->lsm_magic == LOV_MAGIC || \
(lsmp)->lsm_magic == LOV_MAGIC_JOIN), "%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)
{
struct lov_request_set *set;
struct obd_info oinfo;
struct lov_request *req;
struct list_head *pos;
struct lov_obd *lov;
int rc = 0, err;
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;
rc = lov_prep_destroy_set(exp, &oinfo, oa, lsm, oti, &set); if (rc)
RETURN(rc);
list_for_each (pos, &set->set_list) {
int err;
req = list_entry(pos, struct lov_request, rq_link);
if (oa->o_valid & OBD_MD_FLCOOKIE)
oti->oti_logcookies = set->set_cookies + req->rq_stripe;
err = obd_destroy(lov->lov_tgts[req->rq_idx]->ltd_exp,
req->rq_oi.oi_oa, NULL, oti, NULL);
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);
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;
struct list_head *pos;
struct lov_obd *lov;
int err = 0, rc = 0;
ENTRY;
LASSERT(oinfo);
ASSERT_LSM_MAGIC(oinfo->oi_md);
if (!exp || !exp->exp_obd)
RETURN(-ENODEV);
lov = &exp->exp_obd->u.lov;
rc = lov_prep_getattr_set(exp, oinfo, &set);
if (rc)
RETURN(rc);
list_for_each (pos, &set->set_list) {
req = list_entry(pos, struct lov_request, rq_link);
CDEBUG(D_INFO, "objid "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;
struct list_head *pos;
struct lov_request *req;
int rc = 0, err;
ENTRY;
LASSERT(oinfo);
ASSERT_LSM_MAGIC(oinfo->oi_md);
if (!exp || !exp->exp_obd)
RETURN(-ENODEV);
lov = &exp->exp_obd->u.lov;
rc = lov_prep_getattr_set(exp, oinfo, &lovset);
if (rc)
RETURN(rc);
CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
oinfo->oi_md->lsm_object_id, oinfo->oi_md->lsm_stripe_count,
oinfo->oi_md->lsm_stripe_size);
list_for_each (pos, &lovset->set_list) {
req = list_entry(pos, struct lov_request, rq_link);
CDEBUG(D_INFO, "objid "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 (!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;
struct list_head *pos;
struct lov_request *req;
int err = 0, rc = 0;
ENTRY;
LASSERT(oinfo);
ASSERT_LSM_MAGIC(oinfo->oi_md);
if (!exp || !exp->exp_obd)
RETURN(-ENODEV);
/* for now, we only expect the following updates here */
LASSERT(!(oinfo->oi_oa->o_valid & ~(OBD_MD_FLID | OBD_MD_FLTYPE |
OBD_MD_FLMODE | OBD_MD_FLATIME |
OBD_MD_FLMTIME | OBD_MD_FLCTIME |
OBD_MD_FLFLAGS | OBD_MD_FLSIZE |
OBD_MD_FLGROUP | OBD_MD_FLUID |
OBD_MD_FLGID | OBD_MD_FLINLINE |
OBD_MD_FLFID | OBD_MD_FLGENER)));
lov = &exp->exp_obd->u.lov;
rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
if (rc)
RETURN(rc);
list_for_each (pos, &set->set_list) {
req = list_entry(pos, struct lov_request, rq_link);
rc = obd_setattr(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;
struct list_head *pos;
struct lov_obd *lov;
int rc = 0;
ENTRY;
LASSERT(oinfo);
ASSERT_LSM_MAGIC(oinfo->oi_md);
if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
LASSERT(oti);
LASSERT(oti->oti_logcookies);
}
if (!exp || !exp->exp_obd)
RETURN(-ENODEV);
lov = &exp->exp_obd->u.lov;
rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
if (rc)
RETURN(rc);
CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
oinfo->oi_md->lsm_object_id, oinfo->oi_md->lsm_stripe_count,
oinfo->oi_md->lsm_stripe_size);
list_for_each (pos, &set->set_list) {
req = list_entry(pos, struct lov_request, rq_link);
if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
oti->oti_logcookies = set->set_cookies + req->rq_stripe;
CDEBUG(D_INFO, "objid "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 || 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;
struct list_head *pos;
struct lov_request *req;
int rc = 0;
ENTRY;
LASSERT(oinfo);
ASSERT_LSM_MAGIC(oinfo->oi_md);
if (!exp || !exp->exp_obd)
RETURN(-ENODEV);
lov = &exp->exp_obd->u.lov;
rc = lov_prep_punch_set(exp, oinfo, oti, &set);
if (rc)
RETURN(rc);
list_for_each (pos, &set->set_list) {
req = list_entry(pos, struct lov_request, rq_link);
rc = obd_punch(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 || 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(struct obd_export *exp, struct obdo *oa,
struct lov_stripe_md *lsm, obd_off start, obd_off end)
{
struct lov_request_set *set; struct obd_info oinfo;
struct lov_obd *lov;
struct list_head *pos;
struct lov_request *req;
int err = 0, rc = 0;
ENTRY;
ASSERT_LSM_MAGIC(lsm);
if (!exp->exp_obd)
RETURN(-ENODEV);
lov = &exp->exp_obd->u.lov;
rc = lov_prep_sync_set(exp, &oinfo, oa, lsm, start, end, &set);
if (rc)
RETURN(rc);
list_for_each (pos, &set->set_list) {
req = list_entry(pos, struct lov_request, rq_link);
rc = obd_sync(lov->lov_tgts[req->rq_idx]->ltd_exp,
req->rq_oi.oi_oa, NULL,
req->rq_oi.oi_policy.l_extent.start,
req->rq_oi.oi_policy.l_extent.end);
err = lov_update_common_set(set, req, rc);
if (err) {
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);
if (!rc)
rc = err;
}
}
err = lov_fini_sync_set(set);
if (!rc)
rc = err;
RETURN(rc);
}
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,
&start, &end))
continue;
if (!lov->lov_tgts[ost] || !lov->lov_tgts[ost]->ltd_active) {
CDEBUG(D_HA, "lov idx %d inactive\n", ost);
return -EIO;
}
rc = obd_brw(OBD_BRW_CHECK, lov->lov_tgts[ost]->ltd_exp, &oinfo,
1, &pga[i], NULL);
if (rc)
break;
} return rc;
}
static int lov_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
obd_count oa_bufs, struct brw_page *pga,
struct obd_trans_info *oti)
{
struct lov_request_set *set;
struct lov_request *req;
struct list_head *pos;
struct lov_obd *lov = &exp->exp_obd->u.lov;
int err, rc = 0;
ENTRY;
ASSERT_LSM_MAGIC(oinfo->oi_md);
if (cmd == OBD_BRW_CHECK) {
rc = lov_brw_check(lov, oinfo, oa_bufs, pga);
RETURN(rc);
}
rc = lov_prep_brw_set(exp, oinfo, oa_bufs, pga, oti, &set);
if (rc)
RETURN(rc);
list_for_each (pos, &set->set_list) {
struct obd_export *sub_exp;
struct brw_page *sub_pga;
req = list_entry(pos, struct lov_request, rq_link);
sub_exp = lov->lov_tgts[req->rq_idx]->ltd_exp;
sub_pga = set->set_pga + req->rq_pgaidx;
rc = obd_brw(cmd, sub_exp, &req->rq_oi, req->rq_oabufs,
sub_pga, oti);
if (rc)
break;
lov_update_common_set(set, req, rc);
}
err = lov_fini_brw_set(set);
if (!rc)
rc = err;
RETURN(rc);
}
static int lov_brw_interpret(struct ptlrpc_request_set *reqset, void *data,
int rc)
{
struct lov_request_set *lovset = (struct lov_request_set *)data;
ENTRY;
if (rc) {
lovset->set_completes = 0;
lov_fini_brw_set(lovset);
} else {
rc = lov_fini_brw_set(lovset);
}
RETURN(rc);
}
static int lov_brw_async(int cmd, struct obd_export *exp,
struct obd_info *oinfo, obd_count oa_bufs,
struct brw_page *pga, struct obd_trans_info *oti,
struct ptlrpc_request_set *set)
{
struct lov_request_set *lovset;
struct lov_request *req;
struct list_head *pos;
struct lov_obd *lov = &exp->exp_obd->u.lov; int rc = 0;
ENTRY;
LASSERT(oinfo);
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, &lovset);
if (rc)
RETURN(rc);
list_for_each (pos, &lovset->set_list) {
struct obd_export *sub_exp;
struct brw_page *sub_pga;
req = list_entry(pos, struct lov_request, rq_link);
sub_exp = lov->lov_tgts[req->rq_idx]->ltd_exp;
sub_pga = lovset->set_pga + req->rq_pgaidx;
rc = obd_brw_async(cmd, sub_exp, &req->rq_oi, req->rq_oabufs,
sub_pga, oti, set);
if (rc)
GOTO(out, rc);
lov_update_common_set(lovset, req, rc);
}
LASSERT(rc == 0);
LASSERT(set->set_interpret == NULL);
LASSERT(set->set_arg == NULL);
rc = ptlrpc_set_add_cb(set, lov_brw_interpret, lovset);
if (rc)
GOTO(out, rc);
RETURN(rc);
out:
lov_fini_brw_set(lovset);
RETURN(rc);
}
static int lov_ap_make_ready(void *data, int cmd)
{
struct lov_async_page *lap = LAP_FROM_COOKIE(data);
return lap->lap_caller_ops->ap_make_ready(lap->lap_caller_data, cmd);
}
static int lov_ap_refresh_count(void *data, int cmd)
{
struct lov_async_page *lap = LAP_FROM_COOKIE(data);
return lap->lap_caller_ops->ap_refresh_count(lap->lap_caller_data,
cmd);
}
static void lov_ap_fill_obdo(void *data, int cmd, struct obdo *oa)
{
struct lov_async_page *lap = LAP_FROM_COOKIE(data);
lap->lap_caller_ops->ap_fill_obdo(lap->lap_caller_data, cmd, oa);
/* XXX woah, shouldn't we be altering more here? size? */
oa->o_id = lap->lap_loi_id;
oa->o_stripe_idx = lap->lap_stripe;
}
static void lov_ap_update_obdo(void *data, int cmd, struct obdo *oa,
obd_valid valid)
{
struct lov_async_page *lap = LAP_FROM_COOKIE(data);
lap->lap_caller_ops->ap_update_obdo(lap->lap_caller_data, cmd,oa,valid);
}
static int lov_ap_completion(void *data, int cmd, struct obdo *oa, int rc)
{
struct lov_async_page *lap = LAP_FROM_COOKIE(data);
/* in a raid1 regime this would down a count of many ios
* in flight, onl calling the caller_ops completion when all
* the raid1 ios are complete */
rc = lap->lap_caller_ops->ap_completion(lap->lap_caller_data,cmd,oa,rc);
return rc;
}
static struct obd_async_page_ops lov_async_page_ops = {
.ap_make_ready = lov_ap_make_ready,
.ap_refresh_count = lov_ap_refresh_count,
.ap_fill_obdo = lov_ap_fill_obdo,
.ap_update_obdo = lov_ap_update_obdo,
.ap_completion = lov_ap_completion,
};
int lov_prep_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
struct lov_oinfo *loi, cfs_page_t *page,
obd_off offset, struct obd_async_page_ops *ops,
void *data, void **res, int nocache,
struct lustre_handle *lockh)
{
struct lov_obd *lov = &exp->exp_obd->u.lov;
struct lov_async_page *lap;
struct lov_lock_handles *lov_lockh = NULL;
int rc = 0;
ENTRY;
if (!page) {
int i = 0;
/* Find an existing osc so we can get it's stupid sizeof(*oap).
Only because of this layering limitation will a client
mount with no osts fail */
while (!lov->lov_tgts || !lov->lov_tgts[i] ||
!lov->lov_tgts[i]->ltd_exp) {
i++;
if (i >= lov->desc.ld_tgt_count)
RETURN(-ENOMEDIUM);
}
rc = size_round(sizeof(*lap)) +
obd_prep_async_page(lov->lov_tgts[i]->ltd_exp, NULL,
NULL, NULL, 0, NULL, NULL, NULL, 0,
NULL);
RETURN(rc);
}
ASSERT_LSM_MAGIC(lsm);
LASSERT(loi == NULL);
lap = *res;
lap->lap_magic = LOV_AP_MAGIC;
lap->lap_caller_ops = ops;
lap->lap_caller_data = data;
/* for now only raid 0 which passes through */
lap->lap_stripe = lov_stripe_number(lsm, offset);
lov_stripe_offset(lsm, offset, lap->lap_stripe, &lap->lap_sub_offset);
loi = lsm->lsm_oinfo[lap->lap_stripe];
/* so the callback doesn't need the lsm */
lap->lap_loi_id = loi->loi_id;
lap->lap_sub_cookie = (void *)lap + size_round(sizeof(*lap));
if (lockh) {
lov_lockh = lov_handle2llh(lockh);
if (lov_lockh) {
lockh = lov_lockh->llh_handles + lap->lap_stripe;
}
}
rc = obd_prep_async_page(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
lsm, loi, page, lap->lap_sub_offset,
&lov_async_page_ops, lap,
&lap->lap_sub_cookie, nocache, lockh);
if (lov_lockh)
lov_llh_put(lov_lockh);
if (rc)
RETURN(rc);
CDEBUG(D_CACHE, "lap %p page %p cookie %p off "LPU64"\n", lap, page,
lap->lap_sub_cookie, offset);
RETURN(0);
}
static int lov_queue_async_io(struct obd_export *exp,
struct lov_stripe_md *lsm,
struct lov_oinfo *loi, void *cookie,
int cmd, obd_off off, int count,
obd_flag brw_flags, obd_flag async_flags)
{
struct lov_obd *lov = &exp->exp_obd->u.lov;
struct lov_async_page *lap;
int rc;
LASSERT(loi == NULL);
ASSERT_LSM_MAGIC(lsm);
lap = LAP_FROM_COOKIE(cookie);
loi = lsm->lsm_oinfo[lap->lap_stripe];
rc = obd_queue_async_io(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp, lsm,
loi, lap->lap_sub_cookie, cmd, off, count,
brw_flags, async_flags);
RETURN(rc);
}
static int lov_set_async_flags(struct obd_export *exp,
struct lov_stripe_md *lsm,
struct lov_oinfo *loi, void *cookie,
obd_flag async_flags)
{
struct lov_obd *lov = &exp->exp_obd->u.lov;
struct lov_async_page *lap;
int rc;
LASSERT(loi == NULL);
ASSERT_LSM_MAGIC(lsm);
lap = LAP_FROM_COOKIE(cookie);
loi = lsm->lsm_oinfo[lap->lap_stripe];
rc = obd_set_async_flags(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
lsm, loi, lap->lap_sub_cookie, async_flags);
RETURN(rc);
}
static int lov_queue_group_io(struct obd_export *exp,
struct lov_stripe_md *lsm,
struct lov_oinfo *loi,
struct obd_io_group *oig, void *cookie, int cmd, obd_off off, int count,
obd_flag brw_flags, obd_flag async_flags)
{
struct lov_obd *lov = &exp->exp_obd->u.lov;
struct lov_async_page *lap;
int rc;
LASSERT(loi == NULL);
ASSERT_LSM_MAGIC(lsm);
lap = LAP_FROM_COOKIE(cookie);
loi = lsm->lsm_oinfo[lap->lap_stripe];
rc = obd_queue_group_io(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp, lsm,
loi, oig, lap->lap_sub_cookie, cmd, off, count,
brw_flags, async_flags);
RETURN(rc);
}
/* this isn't exactly optimal. we may have queued sync io in oscs on
* all stripes, but we don't record that fact at queue time. so we
* trigger sync io on all stripes. */
static int lov_trigger_group_io(struct obd_export *exp,
struct lov_stripe_md *lsm,
struct lov_oinfo *loi,
struct obd_io_group *oig)
{
struct lov_obd *lov = &exp->exp_obd->u.lov;
int rc = 0, i, err;
LASSERT(loi == NULL);
ASSERT_LSM_MAGIC(lsm);
for (i = 0; i < lsm->lsm_stripe_count; i++) {
loi = lsm->lsm_oinfo[i];
if (!lov->lov_tgts[loi->loi_ost_idx] ||
!lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
continue;
}
err = obd_trigger_group_io(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
lsm, loi, oig);
if (rc == 0 && err != 0)
rc = err;
};
RETURN(rc);
}
static int lov_teardown_async_page(struct obd_export *exp,
struct lov_stripe_md *lsm,
struct lov_oinfo *loi, void *cookie)
{
struct lov_obd *lov = &exp->exp_obd->u.lov;
struct lov_async_page *lap;
int rc;
LASSERT(loi == NULL);
ASSERT_LSM_MAGIC(lsm);
lap = LAP_FROM_COOKIE(cookie);
loi = lsm->lsm_oinfo[lap->lap_stripe];
rc = obd_teardown_async_page(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
lsm, loi, lap->lap_sub_cookie); if (rc) {
CERROR("unable to teardown sub cookie %p: %d\n",
lap->lap_sub_cookie, rc);
RETURN(rc);
}
RETURN(rc);
}
static int lov_enqueue_interpret(struct ptlrpc_request_set *rqset,
void *data, int rc)
{
struct lov_request_set *lovset = (struct lov_request_set *)data;
ENTRY;
rc = lov_fini_enqueue_set(lovset, lovset->set_ei->ei_mode, rc, rqset);
RETURN(rc);
}
static int lov_enqueue(struct obd_export *exp, struct obd_info *oinfo,
struct ldlm_enqueue_info *einfo,
struct ptlrpc_request_set *rqset)
{
ldlm_mode_t mode = einfo->ei_mode;
struct lov_request_set *set;
struct lov_request *req;
struct list_head *pos;
struct lov_obd *lov;
ldlm_error_t rc;
ENTRY;
LASSERT(oinfo);
ASSERT_LSM_MAGIC(oinfo->oi_md);
LASSERT(mode == (mode & -mode));
/* we should never be asked to replay a lock this way. */
LASSERT((oinfo->oi_flags & LDLM_FL_REPLAY) == 0);
if (!exp || !exp->exp_obd)
RETURN(-ENODEV);
lov = &exp->exp_obd->u.lov;
rc = lov_prep_enqueue_set(exp, oinfo, einfo, &set);
if (rc)
RETURN(rc);
list_for_each (pos, &set->set_list) {
req = list_entry(pos, struct lov_request, rq_link);
rc = obd_enqueue(lov->lov_tgts[req->rq_idx]->ltd_exp,
&req->rq_oi, einfo, rqset);
if (rc != ELDLM_OK)
GOTO(out, rc);
}
if (rqset && !list_empty(&rqset->set_requests)) {
LASSERT(rc == 0);
LASSERT(rqset->set_interpret == NULL);
rqset->set_interpret = lov_enqueue_interpret;
rqset->set_arg = (void *)set;
RETURN(rc);
}
out:
rc = lov_fini_enqueue_set(set, mode, rc, rqset);
RETURN(rc);
}
static int lov_match(struct obd_export *exp, struct lov_stripe_md *lsm,
__u32 type, ldlm_policy_data_t *policy, __u32 mode,
int *flags, void *data, struct lustre_handle *lockh)
{
struct lov_request_set *set; struct obd_info oinfo;
struct lov_request *req;
struct list_head *pos;
struct lov_obd *lov = &exp->exp_obd->u.lov;
struct lustre_handle *lov_lockhp;
int lov_flags, rc = 0;
ENTRY;
ASSERT_LSM_MAGIC(lsm);
LASSERT((*flags & LDLM_FL_TEST_LOCK) || mode == (mode & -mode));
if (!exp || !exp->exp_obd)
RETURN(-ENODEV);
lov = &exp->exp_obd->u.lov;
rc = lov_prep_match_set(exp, &oinfo, lsm, policy, mode, lockh, &set);
if (rc)
RETURN(rc);
list_for_each (pos, &set->set_list) {
ldlm_policy_data_t sub_policy;
req = list_entry(pos, struct lov_request, rq_link);
lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
LASSERT(lov_lockhp);
lov_flags = *flags;
sub_policy.l_extent = req->rq_oi.oi_policy.l_extent;
rc = obd_match(lov->lov_tgts[req->rq_idx]->ltd_exp,
req->rq_oi.oi_md, type, &sub_policy,
mode, &lov_flags, data, lov_lockhp);
rc = lov_update_match_set(set, req, rc);
if (rc <= 0)
break;
}
lov_fini_match_set(set, mode, *flags);
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;
struct lov_oinfo *loi;
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;
loi = lsm->lsm_oinfo[i];
if (!lov->lov_tgts[loi->loi_ost_idx]) {
CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
continue;
}
submd.lsm_object_id = loi->loi_id;
submd.lsm_stripe_count = 0;
rc = obd_change_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
&submd, it, data);
}
RETURN(rc);
}
static int lov_cancel(struct obd_export *exp, struct lov_stripe_md *lsm,
__u32 mode, struct lustre_handle *lockh)
{
struct lov_request_set *set;
struct obd_info oinfo;
struct lov_request *req;
struct list_head *pos;
struct lov_obd *lov = &exp->exp_obd->u.lov;
struct lustre_handle *lov_lockhp;
ldlm_mode_t this_mode;
int err = 0, rc = 0;
ENTRY;
ASSERT_LSM_MAGIC(lsm);
if (!exp || !exp->exp_obd)
RETURN(-ENODEV);
LASSERT(lockh);
lov = &exp->exp_obd->u.lov;
rc = lov_prep_cancel_set(exp, &oinfo, lsm, mode, lockh, &set);
if (rc)
RETURN(rc);
list_for_each (pos, &set->set_list) {
req = list_entry(pos, struct lov_request, rq_link);
lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
/* If this lock was used for a write or truncate, the object
* will have been recreated by the OST, cancel the lock
* (setting LCK_GROUP incidentally causes immediate cancel). */
if (OST_LVB_IS_ERR(lsm->lsm_oinfo[req->rq_stripe]->loi_lvb.lvb_blocks) &&
(mode == LCK_PW || mode == LCK_CW))
this_mode = LCK_GROUP;
else
this_mode = mode;
rc = obd_cancel(lov->lov_tgts[req->rq_idx]->ltd_exp,
req->rq_oi.oi_md, this_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, int flags, void *opaque)
{
struct lov_obd *lov;
struct lov_oinfo *loi;
int rc = 0, i;
ENTRY;
if (!exp || !exp->exp_obd)
RETURN(-ENODEV);
lov = &exp->exp_obd->u.lov;
if (lsm == NULL) {
for (i = 0; i < lov->desc.ld_tgt_count; i++) {
int err;
if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp) continue;
err = obd_cancel_unused(lov->lov_tgts[i]->ltd_exp, NULL,
flags, opaque);
if (!rc)
rc = err;
}
RETURN(rc);
}
ASSERT_LSM_MAGIC(lsm);
for (i = 0; i < lsm->lsm_stripe_count; i++) {
struct lov_stripe_md submd;
int err;
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;
}
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_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);
}
static int lov_join_lru(struct obd_export *exp,
struct lov_stripe_md *lsm, int join)
{
struct lov_obd *lov;
struct lov_oinfo *loi;
int i, count = 0;
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;
int rc = 0;
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;
}
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_stripe_count = 0;
rc = obd_join_lru(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
&submd, join); if (rc < 0) {
CERROR("join lru failed. objid: "LPX64" subobj: "LPX64
" ostidx: %d rc: %d\n", lsm->lsm_object_id,
loi->loi_id, loi->loi_ost_idx, rc);
return rc;
} else {
count += rc;
}
}
RETURN(count);
}
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)
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;
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) {
struct obd_device *osc_obd;
req = 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 || 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, rc, count = lov->desc.ld_tgt_count;
struct obd_uuid *uuidp;
ENTRY;
switch (cmd) {
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;
}
rc = copy_to_user((void *)uarg, buf, len);
if (rc)
rc = -EFAULT;
obd_ioctl_freedata(buf, len);
break;
}
case LL_IOC_LOV_SETSTRIPE:
rc = lov_setstripe(exp, 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;
default: {
int set = 0;
if (count == 0)
RETURN(-ENOTTY);
rc = 0;
for (i = 0; i < count; i++) {
int err;
/* OST was disconnected */
if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
continue;
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);
}
static int lov_get_info(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;
int i, rc;
ENTRY;
if (!vallen || !val)
RETURN(-EFAULT);
lov_getref(obddev);
if (KEY_IS("lock_to_stripe")) {
struct {
char name[16];
struct ldlm_lock *lock;
struct lov_stripe_md *lsm;
} *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 < data->lsm->lsm_stripe_count; i++) {
loi = data->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 &&
loi->loi_id == res_id->name[0] &&
loi->loi_gr == res_id->name[1]) {
*stripe = i;
GOTO(out, rc = 0);
}
}
LDLM_ERROR(data->lock, "lock on inode without such object");
dump_lsm(D_ERROR, data->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);
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_LOV_IDX)) {
struct lov_tgt_desc *tgt;
for(i = 0; i < lov->desc.ld_tgt_count; i++) {
tgt = lov->lov_tgts[i];
if (obd_uuid_equals(val, &tgt->ltd_uuid))
GOTO(out, rc = i);
}
}
rc = -EINVAL;
out:
lov_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, incr = 0, check_uuid = 0, do_inactive = 0;
int no_set = !set;
unsigned next_id = 0;
struct lov_tgt_desc *tgt;
void *data;
ENTRY;
if (no_set) {
set = ptlrpc_prep_set();
if (!set)
RETURN(-ENOMEM);
}
lov_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("checksum")) {
do_inactive = 1;
} else if (KEY_IS(KEY_MDS_CONN) || KEY_IS("unlinked")) {
check_uuid = val ? 1 : 0;
} else if (KEY_IS("evict_by_nid")) {
/* use defaults:
do_inactive = incr = 0;
*/
}
for (i = 0; i < count; i++, val = (char *)val + incr) {
if (next_id) {
tgt = lov->lov_tgts[((struct obd_id_info*)val)->idx];
data = ((struct obd_id_info*)val)->data;
} else {
tgt = lov->lov_tgts[i];
data = val;
}
/* 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;
/* 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, data, set);
if (!rc)
rc = err;
}
lov_putref(obddev);
if (no_set) {
err = ptlrpc_set_wait(set);
if (!rc) rc = err;
ptlrpc_set_destroy(set);
}
RETURN(rc);
}
static int lov_checkmd(struct obd_export *exp, struct obd_export *md_exp,
struct lov_stripe_md *lsm)
{
int rc;
ENTRY;
if (!lsm)
RETURN(0);
LASSERT(md_exp);
LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
rc = lsm_op_find(lsm->lsm_magic)->lsm_revalidate(lsm, md_exp->exp_obd);
RETURN(rc);
}
int lov_test_and_clear_async_rc(struct lov_stripe_md *lsm)
{
struct lov_oinfo *loi;
int i, rc = 0;
ENTRY;
for (i = 0; i < lsm->lsm_stripe_count; i++) {
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)
{
__u64 start;
__u32 ssize = lsm->lsm_stripe_size;
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);
}
#if 0
struct lov_multi_wait {
struct ldlm_lock *lock;
wait_queue_t wait;
int completed;
int generation;
};
int lov_complete_many(struct obd_export *exp, struct lov_stripe_md *lsm, struct lustre_handle *lockh)
{
struct lov_lock_handles *lov_lockh = NULL;
struct lustre_handle *lov_lockhp;
struct lov_obd *lov;
struct lov_oinfo *loi;
struct lov_multi_wait *queues;
int rc = 0, i;
ENTRY;
ASSERT_LSM_MAGIC(lsm);
if (!exp || !exp->exp_obd)
RETURN(-ENODEV);
LASSERT(lockh != NULL);
if (lsm->lsm_stripe_count > 1) {
lov_lockh = lov_handle2llh(lockh);
if (lov_lockh == NULL) {
CERROR("LOV: invalid lov lock handle %p\n", lockh);
RETURN(-EINVAL);
}
lov_lockhp = lov_lockh->llh_handles;
} else {
lov_lockhp = lockh;
}
OBD_ALLOC(queues, lsm->lsm_stripe_count * sizeof(*queues));
if (queues == NULL)
GOTO(out, rc = -ENOMEM);
lov = &exp->exp_obd->u.lov;
for (i = 0, loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count;
i++, loi++, lov_lockhp++) {
struct ldlm_lock *lock;
struct obd_device *obd;
lock = ldlm_handle2lock(lov_lockhp);
if (lock == NULL) {
CDEBUG(D_HA, "lov idx %d subobj "LPX64" no lock?\n",
loi->loi_ost_idx, loi->loi_id);
queues[i].completed = 1;
continue;
}
queues[i].lock = lock;
init_waitqueue_entry(&(queues[i].wait), current);
add_wait_queue(lock->l_waitq, &(queues[i].wait));
obd = class_exp2obd(lock->l_conn_export);
if (obd != NULL)
imp = obd->u.cli.cl_import;
if (imp != NULL) {
spin_lock(&imp->imp_lock);
queues[i].generation = imp->imp_generation;
spin_unlock(&imp->imp_lock);
}
}
lwi = LWI_TIMEOUT_INTR(obd_timeout * HZ, ldlm_expired_completion_wait,
interrupted_completion_wait, &lwd);
rc = l_wait_event_added(check_multi_complete(queues, lsm), &lwi);
for (i = 0; i < lsm->lsm_stripe_count; i++)
remove_wait_queue(lock->l_waitq, &(queues[i].wait));
if (rc == -EINTR || rc == -ETIMEDOUT) {
}
out:
if (lov_lockh != NULL)
lov_llh_put(lov_lockh);
RETURN(rc);
}
#endif
void lov_stripe_lock(struct lov_stripe_md *md)
{
LASSERT(md->lsm_lock_owner != cfs_current());
spin_lock(&md->lsm_lock);
LASSERT(md->lsm_lock_owner == NULL);
md->lsm_lock_owner = cfs_current();
}
EXPORT_SYMBOL(lov_stripe_lock);
void lov_stripe_unlock(struct lov_stripe_md *md)
{
LASSERT(md->lsm_lock_owner == cfs_current());
md->lsm_lock_owner = NULL;
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_checkmd = lov_checkmd,
.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_brw_async = lov_brw_async,
.o_prep_async_page = lov_prep_async_page,
.o_queue_async_io = lov_queue_async_io,
.o_set_async_flags = lov_set_async_flags,
.o_queue_group_io = lov_queue_group_io,
.o_trigger_group_io = lov_trigger_group_io,
.o_teardown_async_page = lov_teardown_async_page,
.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_match = lov_match,
.o_change_cbdata = lov_change_cbdata,
.o_cancel = lov_cancel,
.o_cancel_unused = lov_cancel_unused,
.o_join_lru = lov_join_lru,
.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_register_page_removal_cb = lov_register_page_removal_cb,
.o_unregister_page_removal_cb = lov_unregister_page_removal_cb,
.o_register_lock_cancel_cb = lov_register_lock_cancel_cb,
.o_unregister_lock_cancel_cb = lov_unregister_lock_cancel_cb,
};
static quota_interface_t *quota_interface;
extern quota_interface_t lov_quota_interface;
cfs_mem_cache_t *lov_oinfo_slab;
int __init lov_init(void)
{
struct lprocfs_static_vars lvars = { 0 };
int rc, rc2;
ENTRY;
lov_oinfo_slab = cfs_mem_cache_create("lov_oinfo",
sizeof(struct lov_oinfo),
0, SLAB_HWCACHE_ALIGN);
if (lov_oinfo_slab == NULL)
return -ENOMEM;
lprocfs_lov_init_vars(&lvars);
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, lvars.module_vars,
LUSTRE_LOV_NAME);
if (rc) {
if (quota_interface)
PORTAL_SYMBOL_PUT(lov_quota_interface);
rc2 = cfs_mem_cache_destroy(lov_oinfo_slab);
LASSERT(rc2 == 0);
}
RETURN(rc);
}
#ifdef __KERNEL__
static void /*__exit*/ lov_exit(void)
{
int rc;
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("Cluster File Systems, Inc. <info@clusterfs.com>");
MODULE_DESCRIPTION("Lustre Logical Object Volume OBD driver");
MODULE_LICENSE("GPL");
cfs_module(lov, LUSTRE_VERSION_STRING, lov_init, lov_exit);
#endif