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nest-open-source / nest-learning-thermostat / 5.7.1 / linux-imx-ul / refs/heads/master / . / drivers / staging / lustre / lustre / lmv / lmv_obd.c
blob: b9459faf8645a6dffe781c2e05f82ae3e9cbc514 [file] [log] [blame]
/*
* 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) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*/
#define DEBUG_SUBSYSTEM S_LMV
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pagemap.h>
#include <linux/mm.h>
#include <asm/div64.h>
#include <linux/seq_file.h>
#include <linux/namei.h>
#include <linux/uaccess.h>
#include "../include/lustre/lustre_idl.h"
#include "../include/obd_support.h"
#include "../include/lustre_lib.h"
#include "../include/lustre_net.h"
#include "../include/obd_class.h"
#include "../include/lprocfs_status.h"
#include "../include/lustre_lite.h"
#include "../include/lustre_fid.h"
#include "lmv_internal.h"
static void lmv_activate_target(struct lmv_obd *lmv,
struct lmv_tgt_desc *tgt,
int activate)
{
if (tgt->ltd_active == activate)
return;
tgt->ltd_active = activate;
lmv->desc.ld_active_tgt_count += (activate ? 1 : -1);
}
/**
* Error codes:
*
* -EINVAL : UUID can't be found in the LMV's target list
* -ENOTCONN: The UUID is found, but the target connection is bad (!)
* -EBADF : The UUID is found, but the OBD of the wrong type (!)
*/
static int lmv_set_mdc_active(struct lmv_obd *lmv, struct obd_uuid *uuid,
int activate)
{
struct lmv_tgt_desc *uninitialized_var(tgt);
struct obd_device *obd;
int i;
int rc = 0;
CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
lmv, uuid->uuid, activate);
spin_lock(&lmv->lmv_lock);
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
tgt = lmv->tgts[i];
if (tgt == NULL || tgt->ltd_exp == NULL)
continue;
CDEBUG(D_INFO, "Target idx %d is %s conn %#llx\n", i,
tgt->ltd_uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
break;
}
if (i == lmv->desc.ld_tgt_count) {
rc = -EINVAL;
goto out_lmv_lock;
}
obd = class_exp2obd(tgt->ltd_exp);
if (obd == NULL) {
rc = -ENOTCONN;
goto out_lmv_lock;
}
CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
obd->obd_type->typ_name, i);
LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
if (tgt->ltd_active == activate) {
CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
activate ? "" : "in");
goto out_lmv_lock;
}
CDEBUG(D_INFO, "Marking OBD %p %sactive\n", obd,
activate ? "" : "in");
lmv_activate_target(lmv, tgt, activate);
out_lmv_lock:
spin_unlock(&lmv->lmv_lock);
return rc;
}
static struct obd_uuid *lmv_get_uuid(struct obd_export *exp)
{
struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
return obd_get_uuid(lmv->tgts[0]->ltd_exp);
}
static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
enum obd_notify_event ev, void *data)
{
struct obd_connect_data *conn_data;
struct lmv_obd *lmv = &obd->u.lmv;
struct obd_uuid *uuid;
int rc = 0;
if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_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;
if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
/*
* Set MDC as active before notifying the observer, so the
* observer can use the MDC normally.
*/
rc = lmv_set_mdc_active(lmv, uuid,
ev == OBD_NOTIFY_ACTIVE);
if (rc) {
CERROR("%sactivation of %s failed: %d\n",
ev == OBD_NOTIFY_ACTIVE ? "" : "de",
uuid->uuid, rc);
return rc;
}
} else if (ev == OBD_NOTIFY_OCD) {
conn_data = &watched->u.cli.cl_import->imp_connect_data;
/*
* XXX: Make sure that ocd_connect_flags from all targets are
* the same. Otherwise one of MDTs runs wrong version or
* something like this. --umka
*/
obd->obd_self_export->exp_connect_data = *conn_data;
}
#if 0
else if (ev == OBD_NOTIFY_DISCON) {
/*
* For disconnect event, flush fld cache for failout MDS case.
*/
fld_client_flush(&lmv->lmv_fld);
}
#endif
/*
* Pass the notification up the chain.
*/
if (obd->obd_observer)
rc = obd_notify(obd->obd_observer, watched, ev, data);
return rc;
}
/**
* This is fake connect function. Its purpose is to initialize lmv and say
* caller that everything is okay. Real connection will be performed later.
*/
static int lmv_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 proc_dir_entry *lmv_proc_dir;
struct lmv_obd *lmv = &obd->u.lmv;
struct lustre_handle conn = { 0 };
int rc = 0;
/*
* We don't want to actually do the underlying connections more than
* once, so keep track.
*/
lmv->refcount++;
if (lmv->refcount > 1) {
*exp = NULL;
return 0;
}
rc = class_connect(&conn, obd, cluuid);
if (rc) {
CERROR("class_connection() returned %d\n", rc);
return rc;
}
*exp = class_conn2export(&conn);
class_export_get(*exp);
lmv->exp = *exp;
lmv->connected = 0;
lmv->cluuid = *cluuid;
if (data)
lmv->conn_data = *data;
if (obd->obd_proc_private != NULL) {
lmv_proc_dir = obd->obd_proc_private;
} else {
lmv_proc_dir = lprocfs_register("target_obds", obd->obd_proc_entry,
NULL, NULL);
if (IS_ERR(lmv_proc_dir)) {
CERROR("could not register /proc/fs/lustre/%s/%s/target_obds.",
obd->obd_type->typ_name, obd->obd_name);
lmv_proc_dir = NULL;
}
obd->obd_proc_private = lmv_proc_dir;
}
/*
* All real clients should perform actual connection right away, because
* it is possible, that LMV will not have opportunity to connect targets
* and MDC stuff will be called directly, for instance while reading
* ../mdc/../kbytesfree procfs file, etc.
*/
if (data->ocd_connect_flags & OBD_CONNECT_REAL)
rc = lmv_check_connect(obd);
if (rc && lmv_proc_dir) {
lprocfs_remove(&lmv_proc_dir);
obd->obd_proc_private = NULL;
}
return rc;
}
static void lmv_set_timeouts(struct obd_device *obd)
{
struct lmv_tgt_desc *tgt;
struct lmv_obd *lmv;
int i;
lmv = &obd->u.lmv;
if (lmv->server_timeout == 0)
return;
if (lmv->connected == 0)
return;
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
tgt = lmv->tgts[i];
if (tgt == NULL || tgt->ltd_exp == NULL || tgt->ltd_active == 0)
continue;
obd_set_info_async(NULL, tgt->ltd_exp, sizeof(KEY_INTERMDS),
KEY_INTERMDS, 0, NULL, NULL);
}
}
static int lmv_init_ea_size(struct obd_export *exp, int easize,
int def_easize, int cookiesize, int def_cookiesize)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
int i;
int rc = 0;
int change = 0;
if (lmv->max_easize < easize) {
lmv->max_easize = easize;
change = 1;
}
if (lmv->max_def_easize < def_easize) {
lmv->max_def_easize = def_easize;
change = 1;
}
if (lmv->max_cookiesize < cookiesize) {
lmv->max_cookiesize = cookiesize;
change = 1;
}
if (lmv->max_def_cookiesize < def_cookiesize) {
lmv->max_def_cookiesize = def_cookiesize;
change = 1;
}
if (change == 0)
return 0;
if (lmv->connected == 0)
return 0;
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
if (lmv->tgts[i] == NULL ||
lmv->tgts[i]->ltd_exp == NULL ||
lmv->tgts[i]->ltd_active == 0) {
CWARN("%s: NULL export for %d\n", obd->obd_name, i);
continue;
}
rc = md_init_ea_size(lmv->tgts[i]->ltd_exp, easize, def_easize,
cookiesize, def_cookiesize);
if (rc) {
CERROR("%s: obd_init_ea_size() failed on MDT target %d: rc = %d.\n",
obd->obd_name, i, rc);
break;
}
}
return rc;
}
#define MAX_STRING_SIZE 128
static int lmv_connect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
{
struct proc_dir_entry *lmv_proc_dir;
struct lmv_obd *lmv = &obd->u.lmv;
struct obd_uuid *cluuid = &lmv->cluuid;
struct obd_uuid lmv_mdc_uuid = { "LMV_MDC_UUID" };
struct obd_device *mdc_obd;
struct obd_export *mdc_exp;
struct lu_fld_target target;
int rc;
mdc_obd = class_find_client_obd(&tgt->ltd_uuid, LUSTRE_MDC_NAME,
&obd->obd_uuid);
if (!mdc_obd) {
CERROR("target %s not attached\n", tgt->ltd_uuid.uuid);
return -EINVAL;
}
CDEBUG(D_CONFIG, "connect to %s(%s) - %s, %s FOR %s\n",
mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
tgt->ltd_uuid.uuid, obd->obd_uuid.uuid,
cluuid->uuid);
if (!mdc_obd->obd_set_up) {
CERROR("target %s is not set up\n", tgt->ltd_uuid.uuid);
return -EINVAL;
}
rc = obd_connect(NULL, &mdc_exp, mdc_obd, &lmv_mdc_uuid,
&lmv->conn_data, NULL);
if (rc) {
CERROR("target %s connect error %d\n", tgt->ltd_uuid.uuid, rc);
return rc;
}
/*
* Init fid sequence client for this mdc and add new fld target.
*/
rc = obd_fid_init(mdc_obd, mdc_exp, LUSTRE_SEQ_METADATA);
if (rc)
return rc;
target.ft_srv = NULL;
target.ft_exp = mdc_exp;
target.ft_idx = tgt->ltd_idx;
fld_client_add_target(&lmv->lmv_fld, &target);
rc = obd_register_observer(mdc_obd, obd);
if (rc) {
obd_disconnect(mdc_exp);
CERROR("target %s register_observer error %d\n",
tgt->ltd_uuid.uuid, rc);
return rc;
}
if (obd->obd_observer) {
/*
* Tell the observer about the new target.
*/
rc = obd_notify(obd->obd_observer, mdc_exp->exp_obd,
OBD_NOTIFY_ACTIVE,
(void *)(tgt - lmv->tgts[0]));
if (rc) {
obd_disconnect(mdc_exp);
return rc;
}
}
tgt->ltd_active = 1;
tgt->ltd_exp = mdc_exp;
lmv->desc.ld_active_tgt_count++;
md_init_ea_size(tgt->ltd_exp, lmv->max_easize, lmv->max_def_easize,
lmv->max_cookiesize, lmv->max_def_cookiesize);
CDEBUG(D_CONFIG, "Connected to %s(%s) successfully (%d)\n",
mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
atomic_read(&obd->obd_refcount));
lmv_proc_dir = obd->obd_proc_private;
if (lmv_proc_dir) {
struct proc_dir_entry *mdc_symlink;
LASSERT(mdc_obd->obd_type != NULL);
LASSERT(mdc_obd->obd_type->typ_name != NULL);
mdc_symlink = lprocfs_add_symlink(mdc_obd->obd_name,
lmv_proc_dir,
"../../../%s/%s",
mdc_obd->obd_type->typ_name,
mdc_obd->obd_name);
if (mdc_symlink == NULL) {
CERROR("Could not register LMV target /proc/fs/lustre/%s/%s/target_obds/%s.",
obd->obd_type->typ_name, obd->obd_name,
mdc_obd->obd_name);
lprocfs_remove(&lmv_proc_dir);
obd->obd_proc_private = NULL;
}
}
return 0;
}
static void lmv_del_target(struct lmv_obd *lmv, int index)
{
if (lmv->tgts[index] == NULL)
return;
OBD_FREE_PTR(lmv->tgts[index]);
lmv->tgts[index] = NULL;
return;
}
static int lmv_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
__u32 index, int gen)
{
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
int rc = 0;
CDEBUG(D_CONFIG, "Target uuid: %s. index %d\n", uuidp->uuid, index);
lmv_init_lock(lmv);
if (lmv->desc.ld_tgt_count == 0) {
struct obd_device *mdc_obd;
mdc_obd = class_find_client_obd(uuidp, LUSTRE_MDC_NAME,
&obd->obd_uuid);
if (!mdc_obd) {
lmv_init_unlock(lmv);
CERROR("%s: Target %s not attached: rc = %d\n",
obd->obd_name, uuidp->uuid, -EINVAL);
return -EINVAL;
}
}
if ((index < lmv->tgts_size) && (lmv->tgts[index] != NULL)) {
tgt = lmv->tgts[index];
CERROR("%s: UUID %s already assigned at LOV target index %d: rc = %d\n",
obd->obd_name,
obd_uuid2str(&tgt->ltd_uuid), index, -EEXIST);
lmv_init_unlock(lmv);
return -EEXIST;
}
if (index >= lmv->tgts_size) {
/* We need to reallocate the lmv target array. */
struct lmv_tgt_desc **newtgts, **old = NULL;
__u32 newsize = 1;
__u32 oldsize = 0;
while (newsize < index + 1)
newsize <<= 1;
OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
if (newtgts == NULL) {
lmv_init_unlock(lmv);
return -ENOMEM;
}
if (lmv->tgts_size) {
memcpy(newtgts, lmv->tgts,
sizeof(*newtgts) * lmv->tgts_size);
old = lmv->tgts;
oldsize = lmv->tgts_size;
}
lmv->tgts = newtgts;
lmv->tgts_size = newsize;
smp_rmb();
if (old)
OBD_FREE(old, sizeof(*old) * oldsize);
CDEBUG(D_CONFIG, "tgts: %p size: %d\n", lmv->tgts,
lmv->tgts_size);
}
OBD_ALLOC_PTR(tgt);
if (!tgt) {
lmv_init_unlock(lmv);
return -ENOMEM;
}
mutex_init(&tgt->ltd_fid_mutex);
tgt->ltd_idx = index;
tgt->ltd_uuid = *uuidp;
tgt->ltd_active = 0;
lmv->tgts[index] = tgt;
if (index >= lmv->desc.ld_tgt_count)
lmv->desc.ld_tgt_count = index + 1;
if (lmv->connected) {
rc = lmv_connect_mdc(obd, tgt);
if (rc) {
spin_lock(&lmv->lmv_lock);
lmv->desc.ld_tgt_count--;
memset(tgt, 0, sizeof(*tgt));
spin_unlock(&lmv->lmv_lock);
} else {
int easize = sizeof(struct lmv_stripe_md) +
lmv->desc.ld_tgt_count * sizeof(struct lu_fid);
lmv_init_ea_size(obd->obd_self_export, easize, 0, 0, 0);
}
}
lmv_init_unlock(lmv);
return rc;
}
int lmv_check_connect(struct obd_device *obd)
{
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
int i;
int rc;
int easize;
if (lmv->connected)
return 0;
lmv_init_lock(lmv);
if (lmv->connected) {
lmv_init_unlock(lmv);
return 0;
}
if (lmv->desc.ld_tgt_count == 0) {
lmv_init_unlock(lmv);
CERROR("%s: no targets configured.\n", obd->obd_name);
return -EINVAL;
}
CDEBUG(D_CONFIG, "Time to connect %s to %s\n",
lmv->cluuid.uuid, obd->obd_name);
LASSERT(lmv->tgts != NULL);
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
tgt = lmv->tgts[i];
if (tgt == NULL)
continue;
rc = lmv_connect_mdc(obd, tgt);
if (rc)
goto out_disc;
}
lmv_set_timeouts(obd);
class_export_put(lmv->exp);
lmv->connected = 1;
easize = lmv_get_easize(lmv);
lmv_init_ea_size(obd->obd_self_export, easize, 0, 0, 0);
lmv_init_unlock(lmv);
return 0;
out_disc:
while (i-- > 0) {
int rc2;
tgt = lmv->tgts[i];
if (tgt == NULL)
continue;
tgt->ltd_active = 0;
if (tgt->ltd_exp) {
--lmv->desc.ld_active_tgt_count;
rc2 = obd_disconnect(tgt->ltd_exp);
if (rc2) {
CERROR("LMV target %s disconnect on MDC idx %d: error %d\n",
tgt->ltd_uuid.uuid, i, rc2);
}
}
}
class_disconnect(lmv->exp);
lmv_init_unlock(lmv);
return rc;
}
static int lmv_disconnect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
{
struct proc_dir_entry *lmv_proc_dir;
struct lmv_obd *lmv = &obd->u.lmv;
struct obd_device *mdc_obd;
int rc;
LASSERT(tgt != NULL);
LASSERT(obd != NULL);
mdc_obd = class_exp2obd(tgt->ltd_exp);
if (mdc_obd) {
mdc_obd->obd_force = obd->obd_force;
mdc_obd->obd_fail = obd->obd_fail;
mdc_obd->obd_no_recov = obd->obd_no_recov;
}
lmv_proc_dir = obd->obd_proc_private;
if (lmv_proc_dir)
lprocfs_remove_proc_entry(mdc_obd->obd_name, lmv_proc_dir);
rc = obd_fid_fini(tgt->ltd_exp->exp_obd);
if (rc)
CERROR("Can't finalize fids factory\n");
CDEBUG(D_INFO, "Disconnected from %s(%s) successfully\n",
tgt->ltd_exp->exp_obd->obd_name,
tgt->ltd_exp->exp_obd->obd_uuid.uuid);
obd_register_observer(tgt->ltd_exp->exp_obd, NULL);
rc = obd_disconnect(tgt->ltd_exp);
if (rc) {
if (tgt->ltd_active) {
CERROR("Target %s disconnect error %d\n",
tgt->ltd_uuid.uuid, rc);
}
}
lmv_activate_target(lmv, tgt, 0);
tgt->ltd_exp = NULL;
return 0;
}
static int lmv_disconnect(struct obd_export *exp)
{
struct obd_device *obd = class_exp2obd(exp);
struct lmv_obd *lmv = &obd->u.lmv;
int rc;
int i;
if (!lmv->tgts)
goto out_local;
/*
* Only disconnect the underlying layers on the final disconnect.
*/
lmv->refcount--;
if (lmv->refcount != 0)
goto out_local;
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
continue;
lmv_disconnect_mdc(obd, lmv->tgts[i]);
}
if (obd->obd_proc_private)
lprocfs_remove((struct proc_dir_entry **)&obd->obd_proc_private);
else
CERROR("/proc/fs/lustre/%s/%s/target_obds missing\n",
obd->obd_type->typ_name, obd->obd_name);
out_local:
/*
* This is the case when no real connection is established by
* lmv_check_connect().
*/
if (!lmv->connected)
class_export_put(exp);
rc = class_disconnect(exp);
if (lmv->refcount == 0)
lmv->connected = 0;
return rc;
}
static int lmv_fid2path(struct obd_export *exp, int len, void *karg, void *uarg)
{
struct obd_device *obddev = class_exp2obd(exp);
struct lmv_obd *lmv = &obddev->u.lmv;
struct getinfo_fid2path *gf;
struct lmv_tgt_desc *tgt;
struct getinfo_fid2path *remote_gf = NULL;
int remote_gf_size = 0;
int rc;
gf = (struct getinfo_fid2path *)karg;
tgt = lmv_find_target(lmv, &gf->gf_fid);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
repeat_fid2path:
rc = obd_iocontrol(OBD_IOC_FID2PATH, tgt->ltd_exp, len, gf, uarg);
if (rc != 0 && rc != -EREMOTE)
goto out_fid2path;
/* If remote_gf != NULL, it means just building the
* path on the remote MDT, copy this path segment to gf */
if (remote_gf != NULL) {
struct getinfo_fid2path *ori_gf;
char *ptr;
ori_gf = (struct getinfo_fid2path *)karg;
if (strlen(ori_gf->gf_path) +
strlen(gf->gf_path) > ori_gf->gf_pathlen) {
rc = -EOVERFLOW;
goto out_fid2path;
}
ptr = ori_gf->gf_path;
memmove(ptr + strlen(gf->gf_path) + 1, ptr,
strlen(ori_gf->gf_path));
strncpy(ptr, gf->gf_path, strlen(gf->gf_path));
ptr += strlen(gf->gf_path);
*ptr = '/';
}
CDEBUG(D_INFO, "%s: get path %s "DFID" rec: %llu ln: %u\n",
tgt->ltd_exp->exp_obd->obd_name,
gf->gf_path, PFID(&gf->gf_fid), gf->gf_recno,
gf->gf_linkno);
if (rc == 0)
goto out_fid2path;
/* sigh, has to go to another MDT to do path building further */
if (remote_gf == NULL) {
remote_gf_size = sizeof(*remote_gf) + PATH_MAX;
OBD_ALLOC(remote_gf, remote_gf_size);
if (remote_gf == NULL) {
rc = -ENOMEM;
goto out_fid2path;
}
remote_gf->gf_pathlen = PATH_MAX;
}
if (!fid_is_sane(&gf->gf_fid)) {
CERROR("%s: invalid FID "DFID": rc = %d\n",
tgt->ltd_exp->exp_obd->obd_name,
PFID(&gf->gf_fid), -EINVAL);
rc = -EINVAL;
goto out_fid2path;
}
tgt = lmv_find_target(lmv, &gf->gf_fid);
if (IS_ERR(tgt)) {
rc = -EINVAL;
goto out_fid2path;
}
remote_gf->gf_fid = gf->gf_fid;
remote_gf->gf_recno = -1;
remote_gf->gf_linkno = -1;
memset(remote_gf->gf_path, 0, remote_gf->gf_pathlen);
gf = remote_gf;
goto repeat_fid2path;
out_fid2path:
if (remote_gf != NULL)
OBD_FREE(remote_gf, remote_gf_size);
return rc;
}
static int lmv_hsm_req_count(struct lmv_obd *lmv,
const struct hsm_user_request *hur,
const struct lmv_tgt_desc *tgt_mds)
{
int i, nr = 0;
struct lmv_tgt_desc *curr_tgt;
/* count how many requests must be sent to the given target */
for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
curr_tgt = lmv_find_target(lmv, &hur->hur_user_item[i].hui_fid);
if (obd_uuid_equals(&curr_tgt->ltd_uuid, &tgt_mds->ltd_uuid))
nr++;
}
return nr;
}
static void lmv_hsm_req_build(struct lmv_obd *lmv,
struct hsm_user_request *hur_in,
const struct lmv_tgt_desc *tgt_mds,
struct hsm_user_request *hur_out)
{
int i, nr_out;
struct lmv_tgt_desc *curr_tgt;
/* build the hsm_user_request for the given target */
hur_out->hur_request = hur_in->hur_request;
nr_out = 0;
for (i = 0; i < hur_in->hur_request.hr_itemcount; i++) {
curr_tgt = lmv_find_target(lmv,
&hur_in->hur_user_item[i].hui_fid);
if (obd_uuid_equals(&curr_tgt->ltd_uuid, &tgt_mds->ltd_uuid)) {
hur_out->hur_user_item[nr_out] =
hur_in->hur_user_item[i];
nr_out++;
}
}
hur_out->hur_request.hr_itemcount = nr_out;
memcpy(hur_data(hur_out), hur_data(hur_in),
hur_in->hur_request.hr_data_len);
}
static int lmv_hsm_ct_unregister(struct lmv_obd *lmv, unsigned int cmd, int len,
struct lustre_kernelcomm *lk, void *uarg)
{
int i, rc = 0;
/* unregister request (call from llapi_hsm_copytool_fini) */
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
/* best effort: try to clean as much as possible
* (continue on error) */
obd_iocontrol(cmd, lmv->tgts[i]->ltd_exp, len, lk, uarg);
}
/* Whatever the result, remove copytool from kuc groups.
* Unreached coordinators will get EPIPE on next requests
* and will unregister automatically.
*/
rc = libcfs_kkuc_group_rem(lk->lk_uid, lk->lk_group);
return rc;
}
static int lmv_hsm_ct_register(struct lmv_obd *lmv, unsigned int cmd, int len,
struct lustre_kernelcomm *lk, void *uarg)
{
struct file *filp;
int i, j, err;
int rc = 0;
bool any_set = false;
/* All or nothing: try to register to all MDS.
* In case of failure, unregister from previous MDS,
* except if it because of inactive target. */
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
err = obd_iocontrol(cmd, lmv->tgts[i]->ltd_exp,
len, lk, uarg);
if (err) {
if (lmv->tgts[i]->ltd_active) {
/* permanent error */
CERROR("error: iocontrol MDC %s on MDTidx %d cmd %x: err = %d\n",
lmv->tgts[i]->ltd_uuid.uuid,
i, cmd, err);
rc = err;
lk->lk_flags |= LK_FLG_STOP;
/* unregister from previous MDS */
for (j = 0; j < i; j++)
obd_iocontrol(cmd,
lmv->tgts[j]->ltd_exp,
len, lk, uarg);
return rc;
}
/* else: transient error.
* kuc will register to the missing MDT
* when it is back */
} else {
any_set = true;
}
}
if (!any_set)
/* no registration done: return error */
return -ENOTCONN;
/* at least one registration done, with no failure */
filp = fget(lk->lk_wfd);
if (filp == NULL) {
return -EBADF;
}
rc = libcfs_kkuc_group_add(filp, lk->lk_uid, lk->lk_group, lk->lk_data);
if (rc != 0 && filp != NULL)
fput(filp);
return rc;
}
static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
int len, void *karg, void *uarg)
{
struct obd_device *obddev = class_exp2obd(exp);
struct lmv_obd *lmv = &obddev->u.lmv;
int i = 0;
int rc = 0;
int set = 0;
int count = lmv->desc.ld_tgt_count;
if (count == 0)
return -ENOTTY;
switch (cmd) {
case IOC_OBD_STATFS: {
struct obd_ioctl_data *data = karg;
struct obd_device *mdc_obd;
struct obd_statfs stat_buf = {0};
__u32 index;
memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
if (index >= count)
return -ENODEV;
if (lmv->tgts[index] == NULL ||
lmv->tgts[index]->ltd_active == 0)
return -ENODATA;
mdc_obd = class_exp2obd(lmv->tgts[index]->ltd_exp);
if (!mdc_obd)
return -EINVAL;
/* copy UUID */
if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(mdc_obd),
min((int) data->ioc_plen2,
(int) sizeof(struct obd_uuid))))
return -EFAULT;
rc = obd_statfs(NULL, lmv->tgts[index]->ltd_exp, &stat_buf,
cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
0);
if (rc)
return rc;
if (copy_to_user(data->ioc_pbuf1, &stat_buf,
min((int) data->ioc_plen1,
(int) sizeof(stat_buf))))
return -EFAULT;
break;
}
case OBD_IOC_QUOTACTL: {
struct if_quotactl *qctl = karg;
struct lmv_tgt_desc *tgt = NULL;
struct obd_quotactl *oqctl;
if (qctl->qc_valid == QC_MDTIDX) {
if (qctl->qc_idx < 0 || count <= qctl->qc_idx)
return -EINVAL;
tgt = lmv->tgts[qctl->qc_idx];
if (tgt == NULL || tgt->ltd_exp == NULL)
return -EINVAL;
} else if (qctl->qc_valid == QC_UUID) {
for (i = 0; i < count; i++) {
tgt = lmv->tgts[i];
if (tgt == NULL)
continue;
if (!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_MDTIDX;
qctl->obd_uuid = tgt->ltd_uuid;
}
OBD_FREE_PTR(oqctl);
break;
}
case OBD_IOC_CHANGELOG_SEND:
case OBD_IOC_CHANGELOG_CLEAR: {
struct ioc_changelog *icc = karg;
if (icc->icc_mdtindex >= count)
return -ENODEV;
if (lmv->tgts[icc->icc_mdtindex] == NULL ||
lmv->tgts[icc->icc_mdtindex]->ltd_exp == NULL ||
lmv->tgts[icc->icc_mdtindex]->ltd_active == 0)
return -ENODEV;
rc = obd_iocontrol(cmd, lmv->tgts[icc->icc_mdtindex]->ltd_exp,
sizeof(*icc), icc, NULL);
break;
}
case LL_IOC_GET_CONNECT_FLAGS: {
if (lmv->tgts[0] == NULL)
return -ENODATA;
rc = obd_iocontrol(cmd, lmv->tgts[0]->ltd_exp, len, karg, uarg);
break;
}
case OBD_IOC_FID2PATH: {
rc = lmv_fid2path(exp, len, karg, uarg);
break;
}
case LL_IOC_HSM_STATE_GET:
case LL_IOC_HSM_STATE_SET:
case LL_IOC_HSM_ACTION: {
struct md_op_data *op_data = karg;
struct lmv_tgt_desc *tgt;
tgt = lmv_find_target(lmv, &op_data->op_fid1);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
if (tgt->ltd_exp == NULL)
return -EINVAL;
rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
break;
}
case LL_IOC_HSM_PROGRESS: {
const struct hsm_progress_kernel *hpk = karg;
struct lmv_tgt_desc *tgt;
tgt = lmv_find_target(lmv, &hpk->hpk_fid);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
break;
}
case LL_IOC_HSM_REQUEST: {
struct hsm_user_request *hur = karg;
struct lmv_tgt_desc *tgt;
unsigned int reqcount = hur->hur_request.hr_itemcount;
if (reqcount == 0)
return 0;
/* if the request is about a single fid
* or if there is a single MDS, no need to split
* the request. */
if (reqcount == 1 || count == 1) {
tgt = lmv_find_target(lmv,
&hur->hur_user_item[0].hui_fid);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
} else {
/* split fid list to their respective MDS */
for (i = 0; i < count; i++) {
unsigned int nr, reqlen;
int rc1;
struct hsm_user_request *req;
nr = lmv_hsm_req_count(lmv, hur, lmv->tgts[i]);
if (nr == 0) /* nothing for this MDS */
continue;
/* build a request with fids for this MDS */
reqlen = offsetof(typeof(*hur),
hur_user_item[nr])
+ hur->hur_request.hr_data_len;
OBD_ALLOC_LARGE(req, reqlen);
if (req == NULL)
return -ENOMEM;
lmv_hsm_req_build(lmv, hur, lmv->tgts[i], req);
rc1 = obd_iocontrol(cmd, lmv->tgts[i]->ltd_exp,
reqlen, req, uarg);
if (rc1 != 0 && rc == 0)
rc = rc1;
OBD_FREE_LARGE(req, reqlen);
}
}
break;
}
case LL_IOC_LOV_SWAP_LAYOUTS: {
struct md_op_data *op_data = karg;
struct lmv_tgt_desc *tgt1, *tgt2;
tgt1 = lmv_find_target(lmv, &op_data->op_fid1);
if (IS_ERR(tgt1))
return PTR_ERR(tgt1);
tgt2 = lmv_find_target(lmv, &op_data->op_fid2);
if (IS_ERR(tgt2))
return PTR_ERR(tgt2);
if ((tgt1->ltd_exp == NULL) || (tgt2->ltd_exp == NULL))
return -EINVAL;
/* only files on same MDT can have their layouts swapped */
if (tgt1->ltd_idx != tgt2->ltd_idx)
return -EPERM;
rc = obd_iocontrol(cmd, tgt1->ltd_exp, len, karg, uarg);
break;
}
case LL_IOC_HSM_CT_START: {
struct lustre_kernelcomm *lk = karg;
if (lk->lk_flags & LK_FLG_STOP)
rc = lmv_hsm_ct_unregister(lmv, cmd, len, lk, uarg);
else
rc = lmv_hsm_ct_register(lmv, cmd, len, lk, uarg);
break;
}
default:
for (i = 0; i < count; i++) {
struct obd_device *mdc_obd;
int err;
if (lmv->tgts[i] == NULL ||
lmv->tgts[i]->ltd_exp == NULL)
continue;
/* ll_umount_begin() sets force flag but for lmv, not
* mdc. Let's pass it through */
mdc_obd = class_exp2obd(lmv->tgts[i]->ltd_exp);
mdc_obd->obd_force = obddev->obd_force;
err = obd_iocontrol(cmd, lmv->tgts[i]->ltd_exp, len,
karg, uarg);
if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
return err;
} else if (err) {
if (lmv->tgts[i]->ltd_active) {
CERROR("error: iocontrol MDC %s on MDTidx %d cmd %x: err = %d\n",
lmv->tgts[i]->ltd_uuid.uuid,
i, cmd, err);
if (!rc)
rc = err;
}
} else
set = 1;
}
if (!set && !rc)
rc = -EIO;
}
return rc;
}
#if 0
static int lmv_all_chars_policy(int count, const char *name,
int len)
{
unsigned int c = 0;
while (len > 0)
c += name[--len];
c = c % count;
return c;
}
static int lmv_nid_policy(struct lmv_obd *lmv)
{
struct obd_import *imp;
__u32 id;
/*
* XXX: To get nid we assume that underlying obd device is mdc.
*/
imp = class_exp2cliimp(lmv->tgts[0].ltd_exp);
id = imp->imp_connection->c_self ^ (imp->imp_connection->c_self >> 32);
return id % lmv->desc.ld_tgt_count;
}
static int lmv_choose_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
enum placement_policy placement)
{
switch (placement) {
case PLACEMENT_CHAR_POLICY:
return lmv_all_chars_policy(lmv->desc.ld_tgt_count,
op_data->op_name,
op_data->op_namelen);
case PLACEMENT_NID_POLICY:
return lmv_nid_policy(lmv);
default:
break;
}
CERROR("Unsupported placement policy %x\n", placement);
return -EINVAL;
}
#endif
/**
* This is _inode_ placement policy function (not name).
*/
static int lmv_placement_policy(struct obd_device *obd,
struct md_op_data *op_data, u32 *mds)
{
struct lmv_obd *lmv = &obd->u.lmv;
LASSERT(mds != NULL);
if (lmv->desc.ld_tgt_count == 1) {
*mds = 0;
return 0;
}
/**
* If stripe_offset is provided during setdirstripe
* (setdirstripe -i xx), xx MDS will be chosen.
*/
if (op_data->op_cli_flags & CLI_SET_MEA) {
struct lmv_user_md *lum;
lum = (struct lmv_user_md *)op_data->op_data;
if (lum->lum_type == LMV_STRIPE_TYPE &&
lum->lum_stripe_offset != -1) {
if (lum->lum_stripe_offset >= lmv->desc.ld_tgt_count) {
CERROR("%s: Stripe_offset %d > MDT count %d: rc = %d\n",
obd->obd_name,
lum->lum_stripe_offset,
lmv->desc.ld_tgt_count, -ERANGE);
return -ERANGE;
}
*mds = lum->lum_stripe_offset;
return 0;
}
}
/* Allocate new fid on target according to operation type and parent
* home mds. */
*mds = op_data->op_mds;
return 0;
}
int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid, u32 mds)
{
struct lmv_tgt_desc *tgt;
int rc;
tgt = lmv_get_target(lmv, mds);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
/*
* New seq alloc and FLD setup should be atomic. Otherwise we may find
* on server that seq in new allocated fid is not yet known.
*/
mutex_lock(&tgt->ltd_fid_mutex);
if (tgt->ltd_active == 0 || tgt->ltd_exp == NULL) {
rc = -ENODEV;
goto out;
}
/*
* Asking underlaying tgt layer to allocate new fid.
*/
rc = obd_fid_alloc(tgt->ltd_exp, fid, NULL);
if (rc > 0) {
LASSERT(fid_is_sane(fid));
rc = 0;
}
out:
mutex_unlock(&tgt->ltd_fid_mutex);
return rc;
}
int lmv_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
struct md_op_data *op_data)
{
struct obd_device *obd = class_exp2obd(exp);
struct lmv_obd *lmv = &obd->u.lmv;
u32 mds = 0;
int rc;
LASSERT(op_data != NULL);
LASSERT(fid != NULL);
rc = lmv_placement_policy(obd, op_data, &mds);
if (rc) {
CERROR("Can't get target for allocating fid, rc %d\n",
rc);
return rc;
}
rc = __lmv_fid_alloc(lmv, fid, mds);
if (rc) {
CERROR("Can't alloc new fid, rc %d\n", rc);
return rc;
}
return rc;
}
static int lmv_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
{
struct lmv_obd *lmv = &obd->u.lmv;
struct lprocfs_static_vars lvars;
struct lmv_desc *desc;
int rc;
if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
CERROR("LMV setup requires a descriptor\n");
return -EINVAL;
}
desc = (struct lmv_desc *)lustre_cfg_buf(lcfg, 1);
if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
CERROR("Lmv descriptor size wrong: %d > %d\n",
(int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
return -EINVAL;
}
OBD_ALLOC(lmv->tgts, sizeof(*lmv->tgts) * 32);
if (lmv->tgts == NULL)
return -ENOMEM;
lmv->tgts_size = 32;
obd_str2uuid(&lmv->desc.ld_uuid, desc->ld_uuid.uuid);
lmv->desc.ld_tgt_count = 0;
lmv->desc.ld_active_tgt_count = 0;
lmv->max_cookiesize = 0;
lmv->max_def_easize = 0;
lmv->max_easize = 0;
lmv->lmv_placement = PLACEMENT_CHAR_POLICY;
spin_lock_init(&lmv->lmv_lock);
mutex_init(&lmv->init_mutex);
lprocfs_lmv_init_vars(&lvars);
lprocfs_obd_setup(obd, lvars.obd_vars);
#if defined (CONFIG_PROC_FS)
{
rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
0444, &lmv_proc_target_fops, obd);
if (rc)
CWARN("%s: error adding LMV target_obd file: rc = %d\n",
obd->obd_name, rc);
}
#endif
rc = fld_client_init(&lmv->lmv_fld, obd->obd_name,
LUSTRE_CLI_FLD_HASH_DHT);
if (rc) {
CERROR("Can't init FLD, err %d\n", rc);
goto out;
}
return 0;
out:
return rc;
}
static int lmv_cleanup(struct obd_device *obd)
{
struct lmv_obd *lmv = &obd->u.lmv;
fld_client_fini(&lmv->lmv_fld);
if (lmv->tgts != NULL) {
int i;
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
if (lmv->tgts[i] == NULL)
continue;
lmv_del_target(lmv, i);
}
OBD_FREE(lmv->tgts, sizeof(*lmv->tgts) * lmv->tgts_size);
lmv->tgts_size = 0;
}
return 0;
}
static int lmv_process_config(struct obd_device *obd, u32 len, void *buf)
{
struct lustre_cfg *lcfg = buf;
struct obd_uuid obd_uuid;
int gen;
__u32 index;
int rc;
switch (lcfg->lcfg_command) {
case LCFG_ADD_MDC:
/* modify_mdc_tgts add 0:lustre-clilmv 1:lustre-MDT0000_UUID
* 2:0 3:1 4:lustre-MDT0000-mdc_UUID */
if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid)) {
rc = -EINVAL;
goto out;
}
obd_str2uuid(&obd_uuid, lustre_cfg_buf(lcfg, 1));
if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", &index) != 1) {
rc = -EINVAL;
goto out;
}
if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", &gen) != 1) {
rc = -EINVAL;
goto out;
}
rc = lmv_add_target(obd, &obd_uuid, index, gen);
goto out;
default:
CERROR("Unknown command: %d\n", lcfg->lcfg_command);
rc = -EINVAL;
goto out;
}
out:
return rc;
}
static int lmv_statfs(const struct lu_env *env, struct obd_export *exp,
struct obd_statfs *osfs, __u64 max_age, __u32 flags)
{
struct obd_device *obd = class_exp2obd(exp);
struct lmv_obd *lmv = &obd->u.lmv;
struct obd_statfs *temp;
int rc = 0;
int i;
rc = lmv_check_connect(obd);
if (rc)
return rc;
OBD_ALLOC(temp, sizeof(*temp));
if (temp == NULL)
return -ENOMEM;
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
continue;
rc = obd_statfs(env, lmv->tgts[i]->ltd_exp, temp,
max_age, flags);
if (rc) {
CERROR("can't stat MDS #%d (%s), error %d\n", i,
lmv->tgts[i]->ltd_exp->exp_obd->obd_name,
rc);
goto out_free_temp;
}
if (i == 0) {
*osfs = *temp;
/* If the statfs is from mount, it will needs
* retrieve necessary information from MDT0.
* i.e. mount does not need the merged osfs
* from all of MDT.
* And also clients can be mounted as long as
* MDT0 is in service*/
if (flags & OBD_STATFS_FOR_MDT0)
goto out_free_temp;
} else {
osfs->os_bavail += temp->os_bavail;
osfs->os_blocks += temp->os_blocks;
osfs->os_ffree += temp->os_ffree;
osfs->os_files += temp->os_files;
}
}
out_free_temp:
OBD_FREE(temp, sizeof(*temp));
return rc;
}
static int lmv_getstatus(struct obd_export *exp,
struct lu_fid *fid,
struct obd_capa **pc)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
rc = md_getstatus(lmv->tgts[0]->ltd_exp, fid, pc);
return rc;
}
static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
struct obd_capa *oc, u64 valid, const char *name,
const char *input, int input_size, int output_size,
int flags, struct ptlrpc_request **request)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
tgt = lmv_find_target(lmv, fid);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
rc = md_getxattr(tgt->ltd_exp, fid, oc, valid, name, input,
input_size, output_size, flags, request);
return rc;
}
static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
struct obd_capa *oc, u64 valid, const char *name,
const char *input, int input_size, int output_size,
int flags, __u32 suppgid,
struct ptlrpc_request **request)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
tgt = lmv_find_target(lmv, fid);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
rc = md_setxattr(tgt->ltd_exp, fid, oc, valid, name, input,
input_size, output_size, flags, suppgid,
request);
return rc;
}
static int lmv_getattr(struct obd_export *exp, struct md_op_data *op_data,
struct ptlrpc_request **request)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
tgt = lmv_find_target(lmv, &op_data->op_fid1);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
if (op_data->op_flags & MF_GET_MDT_IDX) {
op_data->op_mds = tgt->ltd_idx;
return 0;
}
rc = md_getattr(tgt->ltd_exp, op_data, request);
return rc;
}
static int lmv_null_inode(struct obd_export *exp, const struct lu_fid *fid)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
int i;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
/*
* With DNE every object can have two locks in different namespaces:
* lookup lock in space of MDT storing direntry and update/open lock in
* space of MDT storing inode.
*/
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
continue;
md_null_inode(lmv->tgts[i]->ltd_exp, fid);
}
return 0;
}
static int lmv_find_cbdata(struct obd_export *exp, const struct lu_fid *fid,
ldlm_iterator_t it, void *data)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
int i;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
/*
* With DNE every object can have two locks in different namespaces:
* lookup lock in space of MDT storing direntry and update/open lock in
* space of MDT storing inode.
*/
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
continue;
rc = md_find_cbdata(lmv->tgts[i]->ltd_exp, fid, it, data);
if (rc)
return rc;
}
return rc;
}
static int lmv_close(struct obd_export *exp, struct md_op_data *op_data,
struct md_open_data *mod, struct ptlrpc_request **request)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
tgt = lmv_find_target(lmv, &op_data->op_fid1);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
CDEBUG(D_INODE, "CLOSE "DFID"\n", PFID(&op_data->op_fid1));
rc = md_close(tgt->ltd_exp, op_data, mod, request);
return rc;
}
struct lmv_tgt_desc
*lmv_locate_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
struct lu_fid *fid)
{
struct lmv_tgt_desc *tgt;
tgt = lmv_find_target(lmv, fid);
if (IS_ERR(tgt))
return tgt;
op_data->op_mds = tgt->ltd_idx;
return tgt;
}
static int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
const void *data, int datalen, int mode, __u32 uid,
__u32 gid, cfs_cap_t cap_effective, __u64 rdev,
struct ptlrpc_request **request)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
if (!lmv->desc.ld_active_tgt_count)
return -EIO;
tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
rc = lmv_fid_alloc(exp, &op_data->op_fid2, op_data);
if (rc)
return rc;
CDEBUG(D_INODE, "CREATE '%*s' on "DFID" -> mds #%x\n",
op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
op_data->op_mds);
op_data->op_flags |= MF_MDC_CANCEL_FID1;
rc = md_create(tgt->ltd_exp, op_data, data, datalen, mode, uid, gid,
cap_effective, rdev, request);
if (rc == 0) {
if (*request == NULL)
return rc;
CDEBUG(D_INODE, "Created - "DFID"\n", PFID(&op_data->op_fid2));
}
return rc;
}
static int lmv_done_writing(struct obd_export *exp,
struct md_op_data *op_data,
struct md_open_data *mod)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
tgt = lmv_find_target(lmv, &op_data->op_fid1);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
rc = md_done_writing(tgt->ltd_exp, op_data, mod);
return rc;
}
static int
lmv_enqueue_remote(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
struct lookup_intent *it, struct md_op_data *op_data,
struct lustre_handle *lockh, void *lmm, int lmmsize,
__u64 extra_lock_flags)
{
struct ptlrpc_request *req = it->d.lustre.it_data;
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lustre_handle plock;
struct lmv_tgt_desc *tgt;
struct md_op_data *rdata;
struct lu_fid fid1;
struct mdt_body *body;
int rc = 0;
int pmode;
body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
LASSERT(body != NULL);
if (!(body->valid & OBD_MD_MDS))
return 0;
CDEBUG(D_INODE, "REMOTE_ENQUEUE '%s' on "DFID" -> "DFID"\n",
LL_IT2STR(it), PFID(&op_data->op_fid1), PFID(&body->fid1));
/*
* We got LOOKUP lock, but we really need attrs.
*/
pmode = it->d.lustre.it_lock_mode;
LASSERT(pmode != 0);
memcpy(&plock, lockh, sizeof(plock));
it->d.lustre.it_lock_mode = 0;
it->d.lustre.it_data = NULL;
fid1 = body->fid1;
ptlrpc_req_finished(req);
tgt = lmv_find_target(lmv, &fid1);
if (IS_ERR(tgt)) {
rc = PTR_ERR(tgt);
goto out;
}
OBD_ALLOC_PTR(rdata);
if (rdata == NULL) {
rc = -ENOMEM;
goto out;
}
rdata->op_fid1 = fid1;
rdata->op_bias = MDS_CROSS_REF;
rc = md_enqueue(tgt->ltd_exp, einfo, it, rdata, lockh,
lmm, lmmsize, NULL, extra_lock_flags);
OBD_FREE_PTR(rdata);
out:
ldlm_lock_decref(&plock, pmode);
return rc;
}
static int
lmv_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
struct lookup_intent *it, struct md_op_data *op_data,
struct lustre_handle *lockh, void *lmm, int lmmsize,
struct ptlrpc_request **req, __u64 extra_lock_flags)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID"\n",
LL_IT2STR(it), PFID(&op_data->op_fid1));
tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID" -> mds #%d\n",
LL_IT2STR(it), PFID(&op_data->op_fid1), tgt->ltd_idx);
rc = md_enqueue(tgt->ltd_exp, einfo, it, op_data, lockh,
lmm, lmmsize, req, extra_lock_flags);
if (rc == 0 && it && it->it_op == IT_OPEN) {
rc = lmv_enqueue_remote(exp, einfo, it, op_data, lockh,
lmm, lmmsize, extra_lock_flags);
}
return rc;
}
static int
lmv_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
struct ptlrpc_request **request)
{
struct ptlrpc_request *req = NULL;
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
struct mdt_body *body;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
CDEBUG(D_INODE, "GETATTR_NAME for %*s on "DFID" -> mds #%d\n",
op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
tgt->ltd_idx);
rc = md_getattr_name(tgt->ltd_exp, op_data, request);
if (rc != 0)
return rc;
body = req_capsule_server_get(&(*request)->rq_pill,
&RMF_MDT_BODY);
LASSERT(body != NULL);
if (body->valid & OBD_MD_MDS) {
struct lu_fid rid = body->fid1;
CDEBUG(D_INODE, "Request attrs for "DFID"\n",
PFID(&rid));
tgt = lmv_find_target(lmv, &rid);
if (IS_ERR(tgt)) {
ptlrpc_req_finished(*request);
return PTR_ERR(tgt);
}
op_data->op_fid1 = rid;
op_data->op_valid |= OBD_MD_FLCROSSREF;
op_data->op_namelen = 0;
op_data->op_name = NULL;
rc = md_getattr_name(tgt->ltd_exp, op_data, &req);
ptlrpc_req_finished(*request);
*request = req;
}
return rc;
}
#define md_op_data_fid(op_data, fl) \
(fl == MF_MDC_CANCEL_FID1 ? &op_data->op_fid1 : \
fl == MF_MDC_CANCEL_FID2 ? &op_data->op_fid2 : \
fl == MF_MDC_CANCEL_FID3 ? &op_data->op_fid3 : \
fl == MF_MDC_CANCEL_FID4 ? &op_data->op_fid4 : \
NULL)
static int lmv_early_cancel(struct obd_export *exp, struct md_op_data *op_data,
int op_tgt, ldlm_mode_t mode, int bits, int flag)
{
struct lu_fid *fid = md_op_data_fid(op_data, flag);
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
ldlm_policy_data_t policy = {{0}};
int rc = 0;
if (!fid_is_sane(fid))
return 0;
tgt = lmv_find_target(lmv, fid);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
if (tgt->ltd_idx != op_tgt) {
CDEBUG(D_INODE, "EARLY_CANCEL on "DFID"\n", PFID(fid));
policy.l_inodebits.bits = bits;
rc = md_cancel_unused(tgt->ltd_exp, fid, &policy,
mode, LCF_ASYNC, NULL);
} else {
CDEBUG(D_INODE,
"EARLY_CANCEL skip operation target %d on "DFID"\n",
op_tgt, PFID(fid));
op_data->op_flags |= flag;
rc = 0;
}
return rc;
}
/*
* llite passes fid of an target inode in op_data->op_fid1 and id of directory in
* op_data->op_fid2
*/
static int lmv_link(struct obd_export *exp, struct md_op_data *op_data,
struct ptlrpc_request **request)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
LASSERT(op_data->op_namelen != 0);
CDEBUG(D_INODE, "LINK "DFID":%*s to "DFID"\n",
PFID(&op_data->op_fid2), op_data->op_namelen,
op_data->op_name, PFID(&op_data->op_fid1));
op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
op_data->op_cap = cfs_curproc_cap_pack();
tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid2);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
/*
* Cancel UPDATE lock on child (fid1).
*/
op_data->op_flags |= MF_MDC_CANCEL_FID2;
rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
if (rc != 0)
return rc;
rc = md_link(tgt->ltd_exp, op_data, request);
return rc;
}
static int lmv_rename(struct obd_export *exp, struct md_op_data *op_data,
const char *old, int oldlen, const char *new, int newlen,
struct ptlrpc_request **request)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *src_tgt;
struct lmv_tgt_desc *tgt_tgt;
int rc;
LASSERT(oldlen != 0);
CDEBUG(D_INODE, "RENAME %*s in "DFID" to %*s in "DFID"\n",
oldlen, old, PFID(&op_data->op_fid1),
newlen, new, PFID(&op_data->op_fid2));
rc = lmv_check_connect(obd);
if (rc)
return rc;
op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
op_data->op_cap = cfs_curproc_cap_pack();
src_tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
if (IS_ERR(src_tgt))
return PTR_ERR(src_tgt);
tgt_tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid2);
if (IS_ERR(tgt_tgt))
return PTR_ERR(tgt_tgt);
/*
* LOOKUP lock on src child (fid3) should also be cancelled for
* src_tgt in mdc_rename.
*/
op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
/*
* Cancel UPDATE locks on tgt parent (fid2), tgt_tgt is its
* own target.
*/
rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
LCK_EX, MDS_INODELOCK_UPDATE,
MF_MDC_CANCEL_FID2);
/*
* Cancel LOOKUP locks on tgt child (fid4) for parent tgt_tgt.
*/
if (rc == 0) {
rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
LCK_EX, MDS_INODELOCK_LOOKUP,
MF_MDC_CANCEL_FID4);
}
/*
* Cancel all the locks on tgt child (fid4).
*/
if (rc == 0)
rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
LCK_EX, MDS_INODELOCK_FULL,
MF_MDC_CANCEL_FID4);
if (rc == 0)
rc = md_rename(src_tgt->ltd_exp, op_data, old, oldlen,
new, newlen, request);
return rc;
}
static int lmv_setattr(struct obd_export *exp, struct md_op_data *op_data,
void *ea, int ealen, void *ea2, int ea2len,
struct ptlrpc_request **request,
struct md_open_data **mod)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
int rc = 0;
rc = lmv_check_connect(obd);
if (rc)
return rc;
CDEBUG(D_INODE, "SETATTR for "DFID", valid 0x%x\n",
PFID(&op_data->op_fid1), op_data->op_attr.ia_valid);
op_data->op_flags |= MF_MDC_CANCEL_FID1;
tgt = lmv_find_target(lmv, &op_data->op_fid1);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen, ea2,
ea2len, request, mod);
return rc;
}
static int lmv_sync(struct obd_export *exp, const struct lu_fid *fid,
struct obd_capa *oc, struct ptlrpc_request **request)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
tgt = lmv_find_target(lmv, fid);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
rc = md_sync(tgt->ltd_exp, fid, oc, request);
return rc;
}
/*
* Adjust a set of pages, each page containing an array of lu_dirpages,
* so that each page can be used as a single logical lu_dirpage.
*
* A lu_dirpage is laid out as follows, where s = ldp_hash_start,
* e = ldp_hash_end, f = ldp_flags, p = padding, and each "ent" is a
* struct lu_dirent. It has size up to LU_PAGE_SIZE. The ldp_hash_end
* value is used as a cookie to request the next lu_dirpage in a
* directory listing that spans multiple pages (two in this example):
* ________
* | |
* .|--------v------- -----.
* |s|e|f|p|ent|ent| ... |ent|
* '--|-------------- -----' Each CFS_PAGE contains a single
* '------. lu_dirpage.
* .---------v------- -----.
* |s|e|f|p|ent| 0 | ... | 0 |
* '----------------- -----'
*
* However, on hosts where the native VM page size (PAGE_CACHE_SIZE) is
* larger than LU_PAGE_SIZE, a single host page may contain multiple
* lu_dirpages. After reading the lu_dirpages from the MDS, the
* ldp_hash_end of the first lu_dirpage refers to the one immediately
* after it in the same CFS_PAGE (arrows simplified for brevity, but
* in general e0==s1, e1==s2, etc.):
*
* .-------------------- -----.
* |s0|e0|f0|p|ent|ent| ... |ent|
* |---v---------------- -----|
* |s1|e1|f1|p|ent|ent| ... |ent|
* |---v---------------- -----| Here, each CFS_PAGE contains
* ... multiple lu_dirpages.
* |---v---------------- -----|
* |s'|e'|f'|p|ent|ent| ... |ent|
* '---|---------------- -----'
* v
* .----------------------------.
* | next CFS_PAGE |
*
* This structure is transformed into a single logical lu_dirpage as follows:
*
* - Replace e0 with e' so the request for the next lu_dirpage gets the page
* labeled 'next CFS_PAGE'.
*
* - Copy the LDF_COLLIDE flag from f' to f0 to correctly reflect whether
* a hash collision with the next page exists.
*
* - Adjust the lde_reclen of the ending entry of each lu_dirpage to span
* to the first entry of the next lu_dirpage.
*/
#if PAGE_CACHE_SIZE > LU_PAGE_SIZE
static void lmv_adjust_dirpages(struct page **pages, int ncfspgs, int nlupgs)
{
int i;
for (i = 0; i < ncfspgs; i++) {
struct lu_dirpage *dp = kmap(pages[i]);
struct lu_dirpage *first = dp;
struct lu_dirent *end_dirent = NULL;
struct lu_dirent *ent;
__u64 hash_end = dp->ldp_hash_end;
__u32 flags = dp->ldp_flags;
while (--nlupgs > 0) {
ent = lu_dirent_start(dp);
for (end_dirent = ent; ent != NULL;
end_dirent = ent, ent = lu_dirent_next(ent));
/* Advance dp to next lu_dirpage. */
dp = (struct lu_dirpage *)((char *)dp + LU_PAGE_SIZE);
/* Check if we've reached the end of the CFS_PAGE. */
if (!((unsigned long)dp & ~CFS_PAGE_MASK))
break;
/* Save the hash and flags of this lu_dirpage. */
hash_end = dp->ldp_hash_end;
flags = dp->ldp_flags;
/* Check if lu_dirpage contains no entries. */
if (!end_dirent)
break;
/* Enlarge the end entry lde_reclen from 0 to
* first entry of next lu_dirpage. */
LASSERT(le16_to_cpu(end_dirent->lde_reclen) == 0);
end_dirent->lde_reclen =
cpu_to_le16((char *)(dp->ldp_entries) -
(char *)end_dirent);
}
first->ldp_hash_end = hash_end;
first->ldp_flags &= ~cpu_to_le32(LDF_COLLIDE);
first->ldp_flags |= flags & cpu_to_le32(LDF_COLLIDE);
kunmap(pages[i]);
}
LASSERTF(nlupgs == 0, "left = %d", nlupgs);
}
#else
#define lmv_adjust_dirpages(pages, ncfspgs, nlupgs) do {} while (0)
#endif /* PAGE_CACHE_SIZE > LU_PAGE_SIZE */
static int lmv_readpage(struct obd_export *exp, struct md_op_data *op_data,
struct page **pages, struct ptlrpc_request **request)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
__u64 offset = op_data->op_offset;
int rc;
int ncfspgs; /* pages read in PAGE_CACHE_SIZE */
int nlupgs; /* pages read in LU_PAGE_SIZE */
struct lmv_tgt_desc *tgt;
rc = lmv_check_connect(obd);
if (rc)
return rc;
CDEBUG(D_INODE, "READPAGE at %#llx from "DFID"\n",
offset, PFID(&op_data->op_fid1));
tgt = lmv_find_target(lmv, &op_data->op_fid1);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
rc = md_readpage(tgt->ltd_exp, op_data, pages, request);
if (rc != 0)
return rc;
ncfspgs = ((*request)->rq_bulk->bd_nob_transferred + PAGE_CACHE_SIZE - 1)
>> PAGE_CACHE_SHIFT;
nlupgs = (*request)->rq_bulk->bd_nob_transferred >> LU_PAGE_SHIFT;
LASSERT(!((*request)->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK));
LASSERT(ncfspgs > 0 && ncfspgs <= op_data->op_npages);
CDEBUG(D_INODE, "read %d(%d)/%d pages\n", ncfspgs, nlupgs,
op_data->op_npages);
lmv_adjust_dirpages(pages, ncfspgs, nlupgs);
return rc;
}
static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
struct ptlrpc_request **request)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt = NULL;
struct mdt_body *body;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
retry:
/* Send unlink requests to the MDT where the child is located */
if (likely(!fid_is_zero(&op_data->op_fid2)))
tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid2);
else
tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
op_data->op_cap = cfs_curproc_cap_pack();
/*
* If child's fid is given, cancel unused locks for it if it is from
* another export than parent.
*
* LOOKUP lock for child (fid3) should also be cancelled on parent
* tgt_tgt in mdc_unlink().
*/
op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
/*
* Cancel FULL locks on child (fid3).
*/
rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
MDS_INODELOCK_FULL, MF_MDC_CANCEL_FID3);
if (rc != 0)
return rc;
CDEBUG(D_INODE, "unlink with fid="DFID"/"DFID" -> mds #%d\n",
PFID(&op_data->op_fid1), PFID(&op_data->op_fid2), tgt->ltd_idx);
rc = md_unlink(tgt->ltd_exp, op_data, request);
if (rc != 0 && rc != -EREMOTE)
return rc;
body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
if (body == NULL)
return -EPROTO;
/* Not cross-ref case, just get out of here. */
if (likely(!(body->valid & OBD_MD_MDS)))
return 0;
CDEBUG(D_INODE, "%s: try unlink to another MDT for "DFID"\n",
exp->exp_obd->obd_name, PFID(&body->fid1));
/* This is a remote object, try remote MDT, Note: it may
* try more than 1 time here, Considering following case
* /mnt/lustre is root on MDT0, remote1 is on MDT1
* 1. Initially A does not know where remote1 is, it send
* unlink RPC to MDT0, MDT0 return -EREMOTE, it will
* resend unlink RPC to MDT1 (retry 1st time).
*
* 2. During the unlink RPC in flight,
* client B mv /mnt/lustre/remote1 /mnt/lustre/remote2
* and create new remote1, but on MDT0
*
* 3. MDT1 get unlink RPC(from A), then do remote lock on
* /mnt/lustre, then lookup get fid of remote1, and find
* it is remote dir again, and replay -EREMOTE again.
*
* 4. Then A will resend unlink RPC to MDT0. (retry 2nd times).
*
* In theory, it might try unlimited time here, but it should
* be very rare case. */
op_data->op_fid2 = body->fid1;
ptlrpc_req_finished(*request);
*request = NULL;
goto retry;
}
static int lmv_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
{
struct lmv_obd *lmv = &obd->u.lmv;
switch (stage) {
case OBD_CLEANUP_EARLY:
/* XXX: here should be calling obd_precleanup() down to
* stack. */
break;
case OBD_CLEANUP_EXPORTS:
fld_client_proc_fini(&lmv->lmv_fld);
lprocfs_obd_cleanup(obd);
break;
default:
break;
}
return 0;
}
static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
__u32 keylen, void *key, __u32 *vallen, void *val,
struct lov_stripe_md *lsm)
{
struct obd_device *obd;
struct lmv_obd *lmv;
int rc = 0;
obd = class_exp2obd(exp);
if (obd == NULL) {
CDEBUG(D_IOCTL, "Invalid client cookie %#llx\n",
exp->exp_handle.h_cookie);
return -EINVAL;
}
lmv = &obd->u.lmv;
if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
struct lmv_tgt_desc *tgt;
int i;
rc = lmv_check_connect(obd);
if (rc)
return rc;
LASSERT(*vallen == sizeof(__u32));
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
tgt = lmv->tgts[i];
/*
* All tgts should be connected when this gets called.
*/
if (tgt == NULL || tgt->ltd_exp == NULL)
continue;
if (!obd_get_info(env, tgt->ltd_exp, keylen, key,
vallen, val, NULL))
return 0;
}
return -EINVAL;
} else if (KEY_IS(KEY_MAX_EASIZE) ||
KEY_IS(KEY_DEFAULT_EASIZE) ||
KEY_IS(KEY_MAX_COOKIESIZE) ||
KEY_IS(KEY_DEFAULT_COOKIESIZE) ||
KEY_IS(KEY_CONN_DATA)) {
rc = lmv_check_connect(obd);
if (rc)
return rc;
/*
* Forwarding this request to first MDS, it should know LOV
* desc.
*/
rc = obd_get_info(env, lmv->tgts[0]->ltd_exp, keylen, key,
vallen, val, NULL);
if (!rc && KEY_IS(KEY_CONN_DATA))
exp->exp_connect_data = *(struct obd_connect_data *)val;
return rc;
} else if (KEY_IS(KEY_TGT_COUNT)) {
*((int *)val) = lmv->desc.ld_tgt_count;
return 0;
}
CDEBUG(D_IOCTL, "Invalid key\n");
return -EINVAL;
}
static int lmv_set_info_async(const struct lu_env *env, struct obd_export *exp,
u32 keylen, void *key, u32 vallen,
void *val, struct ptlrpc_request_set *set)
{
struct lmv_tgt_desc *tgt;
struct obd_device *obd;
struct lmv_obd *lmv;
int rc = 0;
obd = class_exp2obd(exp);
if (obd == NULL) {
CDEBUG(D_IOCTL, "Invalid client cookie %#llx\n",
exp->exp_handle.h_cookie);
return -EINVAL;
}
lmv = &obd->u.lmv;
if (KEY_IS(KEY_READ_ONLY) || KEY_IS(KEY_FLUSH_CTX)) {
int i, err = 0;
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
tgt = lmv->tgts[i];
if (tgt == NULL || tgt->ltd_exp == NULL)
continue;
err = obd_set_info_async(env, tgt->ltd_exp,
keylen, key, vallen, val, set);
if (err && rc == 0)
rc = err;
}
return rc;
}
return -EINVAL;
}
static int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
struct lov_stripe_md *lsm)
{
struct obd_device *obd = class_exp2obd(exp);
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_stripe_md *meap;
struct lmv_stripe_md *lsmp;
int mea_size;
int i;
mea_size = lmv_get_easize(lmv);
if (!lmmp)
return mea_size;
if (*lmmp && !lsm) {
OBD_FREE_LARGE(*lmmp, mea_size);
*lmmp = NULL;
return 0;
}
if (*lmmp == NULL) {
OBD_ALLOC_LARGE(*lmmp, mea_size);
if (*lmmp == NULL)
return -ENOMEM;
}
if (!lsm)
return mea_size;
lsmp = (struct lmv_stripe_md *)lsm;
meap = (struct lmv_stripe_md *)*lmmp;
if (lsmp->mea_magic != MEA_MAGIC_LAST_CHAR &&
lsmp->mea_magic != MEA_MAGIC_ALL_CHARS)
return -EINVAL;
meap->mea_magic = cpu_to_le32(lsmp->mea_magic);
meap->mea_count = cpu_to_le32(lsmp->mea_count);
meap->mea_master = cpu_to_le32(lsmp->mea_master);
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
meap->mea_ids[i] = lsmp->mea_ids[i];
fid_cpu_to_le(&meap->mea_ids[i], &lsmp->mea_ids[i]);
}
return mea_size;
}
static int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
struct lov_mds_md *lmm, int lmm_size)
{
struct obd_device *obd = class_exp2obd(exp);
struct lmv_stripe_md **tmea = (struct lmv_stripe_md **)lsmp;
struct lmv_stripe_md *mea = (struct lmv_stripe_md *)lmm;
struct lmv_obd *lmv = &obd->u.lmv;
int mea_size;
int i;
__u32 magic;
mea_size = lmv_get_easize(lmv);
if (lsmp == NULL)
return mea_size;
if (*lsmp != NULL && lmm == NULL) {
OBD_FREE_LARGE(*tmea, mea_size);
*lsmp = NULL;
return 0;
}
LASSERT(mea_size == lmm_size);
OBD_ALLOC_LARGE(*tmea, mea_size);
if (*tmea == NULL)
return -ENOMEM;
if (!lmm)
return mea_size;
if (mea->mea_magic == MEA_MAGIC_LAST_CHAR ||
mea->mea_magic == MEA_MAGIC_ALL_CHARS ||
mea->mea_magic == MEA_MAGIC_HASH_SEGMENT) {
magic = le32_to_cpu(mea->mea_magic);
} else {
/*
* Old mea is not handled here.
*/
CERROR("Old not supportable EA is found\n");
LBUG();
}
(*tmea)->mea_magic = magic;
(*tmea)->mea_count = le32_to_cpu(mea->mea_count);
(*tmea)->mea_master = le32_to_cpu(mea->mea_master);
for (i = 0; i < (*tmea)->mea_count; i++) {
(*tmea)->mea_ids[i] = mea->mea_ids[i];
fid_le_to_cpu(&(*tmea)->mea_ids[i], &(*tmea)->mea_ids[i]);
}
return mea_size;
}
static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
ldlm_policy_data_t *policy, ldlm_mode_t mode,
ldlm_cancel_flags_t flags, void *opaque)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
int rc = 0;
int err;
int i;
LASSERT(fid != NULL);
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL ||
lmv->tgts[i]->ltd_active == 0)
continue;
err = md_cancel_unused(lmv->tgts[i]->ltd_exp, fid,
policy, mode, flags, opaque);
if (!rc)
rc = err;
}
return rc;
}
static int lmv_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data,
__u64 *bits)
{
struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
int rc;
rc = md_set_lock_data(lmv->tgts[0]->ltd_exp, lockh, data, bits);
return rc;
}
static ldlm_mode_t lmv_lock_match(struct obd_export *exp, __u64 flags,
const struct lu_fid *fid, ldlm_type_t type,
ldlm_policy_data_t *policy, ldlm_mode_t mode,
struct lustre_handle *lockh)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
ldlm_mode_t rc;
int i;
CDEBUG(D_INODE, "Lock match for "DFID"\n", PFID(fid));
/*
* With CMD every object can have two locks in different namespaces:
* lookup lock in space of mds storing direntry and update/open lock in
* space of mds storing inode. Thus we check all targets, not only that
* one fid was created in.
*/
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
if (lmv->tgts[i] == NULL ||
lmv->tgts[i]->ltd_exp == NULL ||
lmv->tgts[i]->ltd_active == 0)
continue;
rc = md_lock_match(lmv->tgts[i]->ltd_exp, flags, fid,
type, policy, mode, lockh);
if (rc)
return rc;
}
return 0;
}
static int lmv_get_lustre_md(struct obd_export *exp,
struct ptlrpc_request *req,
struct obd_export *dt_exp,
struct obd_export *md_exp,
struct lustre_md *md)
{
struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
return md_get_lustre_md(lmv->tgts[0]->ltd_exp, req, dt_exp, md_exp, md);
}
static int lmv_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
if (md->mea)
obd_free_memmd(exp, (void *)&md->mea);
return md_free_lustre_md(lmv->tgts[0]->ltd_exp, md);
}
static int lmv_set_open_replay_data(struct obd_export *exp,
struct obd_client_handle *och,
struct lookup_intent *it)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
tgt = lmv_find_target(lmv, &och->och_fid);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
return md_set_open_replay_data(tgt->ltd_exp, och, it);
}
static int lmv_clear_open_replay_data(struct obd_export *exp,
struct obd_client_handle *och)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
tgt = lmv_find_target(lmv, &och->och_fid);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
return md_clear_open_replay_data(tgt->ltd_exp, och);
}
static int lmv_get_remote_perm(struct obd_export *exp,
const struct lu_fid *fid,
struct obd_capa *oc, __u32 suppgid,
struct ptlrpc_request **request)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
tgt = lmv_find_target(lmv, fid);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
rc = md_get_remote_perm(tgt->ltd_exp, fid, oc, suppgid, request);
return rc;
}
static int lmv_renew_capa(struct obd_export *exp, struct obd_capa *oc,
renew_capa_cb_t cb)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
tgt = lmv_find_target(lmv, &oc->c_capa.lc_fid);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
rc = md_renew_capa(tgt->ltd_exp, oc, cb);
return rc;
}
static int lmv_unpack_capa(struct obd_export *exp, struct ptlrpc_request *req,
const struct req_msg_field *field,
struct obd_capa **oc)
{
struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
return md_unpack_capa(lmv->tgts[0]->ltd_exp, req, field, oc);
}
static int lmv_intent_getattr_async(struct obd_export *exp,
struct md_enqueue_info *minfo,
struct ldlm_enqueue_info *einfo)
{
struct md_op_data *op_data = &minfo->mi_data;
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt = NULL;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
tgt = lmv_find_target(lmv, &op_data->op_fid1);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
rc = md_intent_getattr_async(tgt->ltd_exp, minfo, einfo);
return rc;
}
static int lmv_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
struct lu_fid *fid, __u64 *bits)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
tgt = lmv_find_target(lmv, fid);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
rc = md_revalidate_lock(tgt->ltd_exp, it, fid, bits);
return rc;
}
/**
* For lmv, only need to send request to master MDT, and the master MDT will
* process with other slave MDTs. The only exception is Q_GETOQUOTA for which
* we directly fetch data from the slave MDTs.
*/
static int lmv_quotactl(struct obd_device *unused, struct obd_export *exp,
struct obd_quotactl *oqctl)
{
struct obd_device *obd = class_exp2obd(exp);
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt = lmv->tgts[0];
int rc = 0, i;
__u64 curspace, curinodes;
if (!lmv->desc.ld_tgt_count || !tgt->ltd_active) {
CERROR("master lmv inactive\n");
return -EIO;
}
if (oqctl->qc_cmd != Q_GETOQUOTA) {
rc = obd_quotactl(tgt->ltd_exp, oqctl);
return rc;
}
curspace = curinodes = 0;
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
int err;
tgt = lmv->tgts[i];
if (tgt == NULL || tgt->ltd_exp == NULL || tgt->ltd_active == 0)
continue;
if (!tgt->ltd_active) {
CDEBUG(D_HA, "mdt %d is inactive.\n", i);
continue;
}
err = obd_quotactl(tgt->ltd_exp, oqctl);
if (err) {
CERROR("getquota on mdt %d failed. %d\n", i, err);
if (!rc)
rc = err;
} else {
curspace += oqctl->qc_dqblk.dqb_curspace;
curinodes += oqctl->qc_dqblk.dqb_curinodes;
}
}
oqctl->qc_dqblk.dqb_curspace = curspace;
oqctl->qc_dqblk.dqb_curinodes = curinodes;
return rc;
}
static int lmv_quotacheck(struct obd_device *unused, struct obd_export *exp,
struct obd_quotactl *oqctl)
{
struct obd_device *obd = class_exp2obd(exp);
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
int i, rc = 0;
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
int err;
tgt = lmv->tgts[i];
if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active) {
CERROR("lmv idx %d inactive\n", i);
return -EIO;
}
err = obd_quotacheck(tgt->ltd_exp, oqctl);
if (err && !rc)
rc = err;
}
return rc;
}
static struct obd_ops lmv_obd_ops = {
.o_owner = THIS_MODULE,
.o_setup = lmv_setup,
.o_cleanup = lmv_cleanup,
.o_precleanup = lmv_precleanup,
.o_process_config = lmv_process_config,
.o_connect = lmv_connect,
.o_disconnect = lmv_disconnect,
.o_statfs = lmv_statfs,
.o_get_info = lmv_get_info,
.o_set_info_async = lmv_set_info_async,
.o_packmd = lmv_packmd,
.o_unpackmd = lmv_unpackmd,
.o_notify = lmv_notify,
.o_get_uuid = lmv_get_uuid,
.o_iocontrol = lmv_iocontrol,
.o_quotacheck = lmv_quotacheck,
.o_quotactl = lmv_quotactl
};
static struct md_ops lmv_md_ops = {
.m_getstatus = lmv_getstatus,
.m_null_inode = lmv_null_inode,
.m_find_cbdata = lmv_find_cbdata,
.m_close = lmv_close,
.m_create = lmv_create,
.m_done_writing = lmv_done_writing,
.m_enqueue = lmv_enqueue,
.m_getattr = lmv_getattr,
.m_getxattr = lmv_getxattr,
.m_getattr_name = lmv_getattr_name,
.m_intent_lock = lmv_intent_lock,
.m_link = lmv_link,
.m_rename = lmv_rename,
.m_setattr = lmv_setattr,
.m_setxattr = lmv_setxattr,
.m_sync = lmv_sync,
.m_readpage = lmv_readpage,
.m_unlink = lmv_unlink,
.m_init_ea_size = lmv_init_ea_size,
.m_cancel_unused = lmv_cancel_unused,
.m_set_lock_data = lmv_set_lock_data,
.m_lock_match = lmv_lock_match,
.m_get_lustre_md = lmv_get_lustre_md,
.m_free_lustre_md = lmv_free_lustre_md,
.m_set_open_replay_data = lmv_set_open_replay_data,
.m_clear_open_replay_data = lmv_clear_open_replay_data,
.m_renew_capa = lmv_renew_capa,
.m_unpack_capa = lmv_unpack_capa,
.m_get_remote_perm = lmv_get_remote_perm,
.m_intent_getattr_async = lmv_intent_getattr_async,
.m_revalidate_lock = lmv_revalidate_lock
};
static int __init lmv_init(void)
{
struct lprocfs_static_vars lvars;
int rc;
lprocfs_lmv_init_vars(&lvars);
rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
lvars.module_vars, LUSTRE_LMV_NAME, NULL);
return rc;
}
static void lmv_exit(void)
{
class_unregister_type(LUSTRE_LMV_NAME);
}
MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
MODULE_LICENSE("GPL");
module_init(lmv_init);
module_exit(lmv_exit);