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* 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.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
* Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, 2015, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*/
#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_net.h"
#include "../include/obd_class.h"
#include "../include/lustre_lmv.h"
#include "../include/lprocfs_status.h"
#include "../include/cl_object.h"
#include "../include/lustre_fid.h"
#include "../include/lustre/lustre_ioctl.h"
#include "../include/lustre_kernelcomm.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);
tgt->ltd_exp->exp_obd->obd_inactive = !activate;
}
/**
* 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, const struct obd_uuid *uuid,
int activate)
{
struct lmv_tgt_desc *uninitialized_var(tgt);
struct obd_device *obd;
u32 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 || !tgt->ltd_exp)
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) {
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;
struct lmv_tgt_desc *tgt = lmv->tgts[0];
return tgt ? obd_get_uuid(tgt->ltd_exp) : NULL;
}
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;
}
/*
* 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 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;
lmv->lmv_tgts_kobj = kobject_create_and_add("target_obds",
&obd->obd_kobj);
/*
* 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 && data->ocd_connect_flags & OBD_CONNECT_REAL)
rc = lmv_check_connect(obd);
if (rc && lmv->lmv_tgts_kobj)
kobject_put(lmv->lmv_tgts_kobj);
return rc;
}
static int lmv_init_ea_size(struct obd_export *exp, u32 easize, u32 def_easize)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
u32 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 (change == 0)
return 0;
if (lmv->connected == 0)
return 0;
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
struct lmv_tgt_desc *tgt = lmv->tgts[i];
if (!tgt || !tgt->ltd_exp || !tgt->ltd_active) {
CWARN("%s: NULL export for %d\n", obd->obd_name, i);
continue;
}
rc = md_init_ea_size(tgt->ltd_exp, easize, def_easize);
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 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);
CDEBUG(D_CONFIG, "Connected to %s(%s) successfully (%d)\n",
mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
atomic_read(&obd->obd_refcount));
if (lmv->lmv_tgts_kobj)
/* Even if we failed to create the link, that's fine */
rc = sysfs_create_link(lmv->lmv_tgts_kobj, &mdc_obd->obd_kobj,
mdc_obd->obd_name);
return 0;
}
static void lmv_del_target(struct lmv_obd *lmv, int index)
{
if (!lmv->tgts[index])
return;
kfree(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 obd_device *mdc_obd;
struct lmv_tgt_desc *tgt;
int orig_tgt_count = 0;
int rc = 0;
CDEBUG(D_CONFIG, "Target uuid: %s. index %d\n", uuidp->uuid, index);
mdc_obd = class_find_client_obd(uuidp, LUSTRE_MDC_NAME,
&obd->obd_uuid);
if (!mdc_obd) {
CERROR("%s: Target %s not attached: rc = %d\n",
obd->obd_name, uuidp->uuid, -EINVAL);
return -EINVAL;
}
mutex_lock(&lmv->lmv_init_mutex);
if ((index < lmv->tgts_size) && lmv->tgts[index]) {
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);
mutex_unlock(&lmv->lmv_init_mutex);
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;
newtgts = kcalloc(newsize, sizeof(*newtgts), GFP_NOFS);
if (!newtgts) {
mutex_unlock(&lmv->lmv_init_mutex);
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();
kfree(old);
CDEBUG(D_CONFIG, "tgts: %p size: %d\n", lmv->tgts,
lmv->tgts_size);
}
tgt = kzalloc(sizeof(*tgt), GFP_NOFS);
if (!tgt) {
mutex_unlock(&lmv->lmv_init_mutex);
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) {
orig_tgt_count = lmv->desc.ld_tgt_count;
lmv->desc.ld_tgt_count = index + 1;
}
if (!lmv->connected) {
/* lmv_check_connect() will connect this target. */
mutex_unlock(&lmv->lmv_init_mutex);
return rc;
}
/* Otherwise let's connect it ourselves */
mutex_unlock(&lmv->lmv_init_mutex);
rc = lmv_connect_mdc(obd, tgt);
if (rc) {
spin_lock(&lmv->lmv_lock);
if (lmv->desc.ld_tgt_count == index + 1)
lmv->desc.ld_tgt_count = orig_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);
}
return rc;
}
int lmv_check_connect(struct obd_device *obd)
{
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
u32 i;
int rc;
int easize;
if (lmv->connected)
return 0;
mutex_lock(&lmv->lmv_init_mutex);
if (lmv->connected) {
mutex_unlock(&lmv->lmv_init_mutex);
return 0;
}
if (lmv->desc.ld_tgt_count == 0) {
mutex_unlock(&lmv->lmv_init_mutex);
CERROR("%s: no targets configured.\n", obd->obd_name);
return -EINVAL;
}
LASSERT(lmv->tgts);
if (!lmv->tgts[0]) {
mutex_unlock(&lmv->lmv_init_mutex);
CERROR("%s: no target configured for index 0.\n",
obd->obd_name);
return -EINVAL;
}
CDEBUG(D_CONFIG, "Time to connect %s to %s\n",
lmv->cluuid.uuid, obd->obd_name);
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
tgt = lmv->tgts[i];
if (!tgt)
continue;
rc = lmv_connect_mdc(obd, tgt);
if (rc)
goto out_disc;
}
class_export_put(lmv->exp);
lmv->connected = 1;
easize = lmv_mds_md_size(lmv->desc.ld_tgt_count, LMV_MAGIC);
lmv_init_ea_size(obd->obd_self_export, easize, 0);
mutex_unlock(&lmv->lmv_init_mutex);
return 0;
out_disc:
while (i-- > 0) {
int rc2;
tgt = lmv->tgts[i];
if (!tgt)
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);
mutex_unlock(&lmv->lmv_init_mutex);
return rc;
}
static int lmv_disconnect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
{
struct lmv_obd *lmv = &obd->u.lmv;
struct obd_device *mdc_obd;
int rc;
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;
if (lmv->lmv_tgts_kobj)
sysfs_remove_link(lmv->lmv_tgts_kobj,
mdc_obd->obd_name);
}
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;
u32 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] || !lmv->tgts[i]->ltd_exp)
continue;
lmv_disconnect_mdc(obd, lmv->tgts[i]);
}
if (lmv->lmv_tgts_kobj)
kobject_put(lmv->lmv_tgts_kobj);
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 __user *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) {
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) {
remote_gf_size = sizeof(*remote_gf) + PATH_MAX;
remote_gf = kzalloc(remote_gf_size, GFP_NOFS);
if (!remote_gf) {
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:
kfree(remote_gf);
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)
{
u32 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 (IS_ERR(curr_tgt))
return PTR_ERR(curr_tgt);
if (obd_uuid_equals(&curr_tgt->ltd_uuid, &tgt_mds->ltd_uuid))
nr++;
}
return nr;
}
static int 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 (IS_ERR(curr_tgt))
return PTR_ERR(curr_tgt);
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);
return 0;
}
static int lmv_hsm_ct_unregister(struct lmv_obd *lmv, unsigned int cmd, int len,
struct lustre_kernelcomm *lk,
void __user *uarg)
{
__u32 i;
/* unregister request (call from llapi_hsm_copytool_fini) */
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
struct lmv_tgt_desc *tgt = lmv->tgts[i];
if (!tgt || !tgt->ltd_exp)
continue;
/* 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.
*/
return libcfs_kkuc_group_rem(lk->lk_uid, lk->lk_group);
}
static int lmv_hsm_ct_register(struct lmv_obd *lmv, unsigned int cmd, int len,
struct lustre_kernelcomm *lk, void __user *uarg)
{
struct file *filp;
__u32 i, j;
int err, rc = 0;
bool any_set = false;
struct kkuc_ct_data kcd = { 0 };
/* 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++) {
struct lmv_tgt_desc *tgt = lmv->tgts[i];
if (!tgt || !tgt->ltd_exp)
continue;
err = obd_iocontrol(cmd, tgt->ltd_exp, len, lk, uarg);
if (err) {
if (tgt->ltd_active) {
/* permanent error */
CERROR("error: iocontrol MDC %s on MDTidx %d cmd %x: err = %d\n",
tgt->ltd_uuid.uuid, i, cmd, err);
rc = err;
lk->lk_flags |= LK_FLG_STOP;
/* unregister from previous MDS */
for (j = 0; j < i; j++) {
tgt = lmv->tgts[j];
if (!tgt || !tgt->ltd_exp)
continue;
obd_iocontrol(cmd, tgt->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)
return -EBADF;
kcd.kcd_magic = KKUC_CT_DATA_MAGIC;
kcd.kcd_uuid = lmv->cluuid;
kcd.kcd_archive = lk->lk_data;
rc = libcfs_kkuc_group_add(filp, lk->lk_uid, lk->lk_group,
&kcd, sizeof(kcd));
if (rc)
fput(filp);
return rc;
}
static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
int len, void *karg, void __user *uarg)
{
struct obd_device *obddev = class_exp2obd(exp);
struct lmv_obd *lmv = &obddev->u.lmv;
struct lmv_tgt_desc *tgt = NULL;
u32 i = 0;
int rc = 0;
int set = 0;
u32 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;
tgt = lmv->tgts[index];
if (!tgt || !tgt->ltd_active)
return -ENODATA;
mdc_obd = class_exp2obd(tgt->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, tgt->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 obd_quotactl *oqctl;
if (qctl->qc_valid == QC_MDTIDX) {
if (count <= qctl->qc_idx)
return -EINVAL;
tgt = lmv->tgts[qctl->qc_idx];
if (!tgt || !tgt->ltd_exp)
return -EINVAL;
} else if (qctl->qc_valid == QC_UUID) {
for (i = 0; i < count; i++) {
tgt = lmv->tgts[i];
if (!tgt)
continue;
if (!obd_uuid_equals(&tgt->ltd_uuid,
&qctl->obd_uuid))
continue;
if (!tgt->ltd_exp)
return -EINVAL;
break;
}
} else {
return -EINVAL;
}
if (i >= count)
return -EAGAIN;
LASSERT(tgt && tgt->ltd_exp);
oqctl = kzalloc(sizeof(*oqctl), GFP_NOFS);
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;
}
kfree(oqctl);
break;
}
case OBD_IOC_CHANGELOG_SEND:
case OBD_IOC_CHANGELOG_CLEAR: {
struct ioc_changelog *icc = karg;
if (icc->icc_mdtindex >= count)
return -ENODEV;
tgt = lmv->tgts[icc->icc_mdtindex];
if (!tgt || !tgt->ltd_exp || !tgt->ltd_active)
return -ENODEV;
rc = obd_iocontrol(cmd, tgt->ltd_exp, sizeof(*icc), icc, NULL);
break;
}
case LL_IOC_GET_CONNECT_FLAGS: {
tgt = lmv->tgts[0];
if (!tgt || !tgt->ltd_exp)
return -ENODATA;
rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
break;
}
case LL_IOC_FID2MDTIDX: {
struct lu_fid *fid = karg;
int mdt_index;
rc = lmv_fld_lookup(lmv, fid, &mdt_index);
if (rc)
return rc;
/*
* Note: this is from llite(see ll_dir_ioctl()), @uarg does not
* point to user space memory for FID2MDTIDX.
*/
*(__u32 *)uarg = mdt_index;
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;
tgt = lmv_find_target(lmv, &op_data->op_fid1);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
if (!tgt->ltd_exp)
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;
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;
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++) {
struct hsm_user_request *req;
size_t reqlen;
int nr, rc1;
tgt = lmv->tgts[i];
if (!tgt || !tgt->ltd_exp)
continue;
nr = lmv_hsm_req_count(lmv, hur, tgt);
if (nr < 0)
return nr;
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;
req = libcfs_kvzalloc(reqlen, GFP_NOFS);
if (!req)
return -ENOMEM;
rc1 = lmv_hsm_req_build(lmv, hur, tgt, req);
if (rc1 < 0)
goto hsm_req_err;
rc1 = obd_iocontrol(cmd, tgt->ltd_exp, reqlen,
req, uarg);
hsm_req_err:
if (rc1 != 0 && rc == 0)
rc = rc1;
kvfree(req);
}
}
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 || !tgt2->ltd_exp)
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;
tgt = lmv->tgts[i];
if (!tgt || !tgt->ltd_exp)
continue;
/* ll_umount_begin() sets force flag but for lmv, not
* mdc. Let's pass it through
*/
mdc_obd = class_exp2obd(tgt->ltd_exp);
mdc_obd->obd_force = obddev->obd_force;
err = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
if (err) {
if (tgt->ltd_active) {
CERROR("error: iocontrol MDC %s on MDTidx %d cmd %x: err = %d\n",
tgt->ltd_uuid.uuid, i, cmd, err);
if (!rc)
rc = err;
}
} else {
set = 1;
}
}
if (!set && !rc)
rc = -EIO;
}
return rc;
}
/**
* 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);
if (lmv->desc.ld_tgt_count == 1) {
*mds = 0;
return 0;
}
if (op_data->op_default_stripe_offset != -1) {
*mds = op_data->op_default_stripe_offset;
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 && op_data->op_data) {
struct lmv_user_md *lum;
lum = op_data->op_data;
if (le32_to_cpu(lum->lum_stripe_offset) != (__u32)-1) {
*mds = le32_to_cpu(lum->lum_stripe_offset);
} else {
/*
* -1 means default, which will be in the same MDT with
* the stripe
*/
*mds = op_data->op_mds;
lum->lum_stripe_offset = cpu_to_le32(op_data->op_mds);
}
} else {
/*
* 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, NULL);
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) {
rc = -ENODEV;
goto out;
}
/*
* Asking underlaying tgt layer to allocate new fid.
*/
rc = obd_fid_alloc(NULL, 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(const struct lu_env *env, 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);
LASSERT(fid);
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 = { NULL };
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;
}
lmv->tgts_size = 32U;
lmv->tgts = kcalloc(lmv->tgts_size, sizeof(*lmv->tgts), GFP_NOFS);
if (!lmv->tgts)
return -ENOMEM;
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_def_easize = 0;
lmv->max_easize = 0;
spin_lock_init(&lmv->lmv_lock);
mutex_init(&lmv->lmv_init_mutex);
lprocfs_lmv_init_vars(&lvars);
lprocfs_obd_setup(obd, lvars.obd_vars, lvars.sysfs_vars);
rc = ldebugfs_seq_create(obd->obd_debugfs_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);
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) {
int i;
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
if (!lmv->tgts[i])
continue;
lmv_del_target(lmv, i);
}
kfree(lmv->tgts);
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), "%u", &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;
u32 i;
rc = lmv_check_connect(obd);
if (rc)
return rc;
temp = kzalloc(sizeof(*temp), GFP_NOFS);
if (!temp)
return -ENOMEM;
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
if (!lmv->tgts[i] || !lmv->tgts[i]->ltd_exp)
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:
kfree(temp);
return rc;
}
static int lmv_getstatus(struct obd_export *exp,
struct lu_fid *fid)
{
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;
return md_getstatus(lmv->tgts[0]->ltd_exp, fid);
}
static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
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);
return md_getxattr(tgt->ltd_exp, fid, valid, name, input,
input_size, output_size, flags, request);
}
static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
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);
return md_setxattr(tgt->ltd_exp, fid, valid, name, input,
input_size, output_size, flags, suppgid,
request);
}
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;
}
return md_getattr(tgt->ltd_exp, op_data, request);
}
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;
u32 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] || !lmv->tgts[i]->ltd_exp)
continue;
md_null_inode(lmv->tgts[i]->ltd_exp, fid);
}
return 0;
}
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));
return md_close(tgt->ltd_exp, op_data, mod, request);
}
/**
* Choosing the MDT by name or FID in @op_data.
* For non-striped directory, it will locate MDT by fid.
* For striped-directory, it will locate MDT by name. And also
* it will reset op_fid1 with the FID of the chosen stripe.
**/
static struct lmv_tgt_desc *
lmv_locate_target_for_name(struct lmv_obd *lmv, struct lmv_stripe_md *lsm,
const char *name, int namelen, struct lu_fid *fid,
u32 *mds)
{
const struct lmv_oinfo *oinfo;
struct lmv_tgt_desc *tgt;
if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_NAME_HASH)) {
if (cfs_fail_val >= lsm->lsm_md_stripe_count)
return ERR_PTR(-EBADF);
oinfo = &lsm->lsm_md_oinfo[cfs_fail_val];
} else {
oinfo = lsm_name_to_stripe_info(lsm, name, namelen);
if (IS_ERR(oinfo))
return ERR_CAST(oinfo);
}
if (fid)
*fid = oinfo->lmo_fid;
if (mds)
*mds = oinfo->lmo_mds;
tgt = lmv_get_target(lmv, oinfo->lmo_mds, NULL);
CDEBUG(D_INFO, "locate on mds %u " DFID "\n", oinfo->lmo_mds,
PFID(&oinfo->lmo_fid));
return tgt;
}
/**
* Locate mds by fid or name
*
* For striped directory (lsm != NULL), it will locate the stripe
* by name hash (see lsm_name_to_stripe_info()). Note: if the hash_type
* is unknown, it will return -EBADFD, and lmv_intent_lookup might need
* walk through all of stripes to locate the entry.
*
* For normal direcotry, it will locate MDS by FID directly.
* \param[in] lmv LMV device
* \param[in] op_data client MD stack parameters, name, namelen
* mds_num etc.
* \param[in] fid object FID used to locate MDS.
*
* retval pointer to the lmv_tgt_desc if succeed.
* ERR_PTR(errno) if failed.
*/
struct lmv_tgt_desc*
lmv_locate_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
struct lu_fid *fid)
{
struct lmv_stripe_md *lsm = op_data->op_mea1;
struct lmv_tgt_desc *tgt;
/*
* During creating VOLATILE file, it should honor the mdt
* index if the file under striped dir is being restored, see
* ct_restore().
*/
if (op_data->op_bias & MDS_CREATE_VOLATILE &&
(int)op_data->op_mds != -1) {
int i;
tgt = lmv_get_target(lmv, op_data->op_mds, NULL);
if (IS_ERR(tgt))
return tgt;
if (lsm) {
/* refill the right parent fid */
for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
struct lmv_oinfo *oinfo;
oinfo = &lsm->lsm_md_oinfo[i];
if (oinfo->lmo_mds == op_data->op_mds) {
*fid = oinfo->lmo_fid;
break;
}
}
if (i == lsm->lsm_md_stripe_count)
*fid = lsm->lsm_md_oinfo[0].lmo_fid;
}
return tgt;
}
if (!lsm || !op_data->op_namelen) {
tgt = lmv_find_target(lmv, fid);
if (IS_ERR(tgt))
return tgt;
op_data->op_mds = tgt->ltd_idx;
return tgt;
}
return lmv_locate_target_for_name(lmv, lsm, op_data->op_name,
op_data->op_namelen, fid,
&op_data->op_mds);
}
static int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
const void *data, size_t datalen, umode_t mode,
uid_t uid, gid_t 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);
CDEBUG(D_INODE, "CREATE name '%.*s' on "DFID" -> mds #%x\n",
(int)op_data->op_namelen, op_data->op_name,
PFID(&op_data->op_fid1), op_data->op_mds);
rc = lmv_fid_alloc(NULL, exp, &op_data->op_fid2, op_data);
if (rc)
return rc;
if (exp_connect_flags(exp) & OBD_CONNECT_DIR_STRIPE) {
/*
* Send the create request to the MDT where the object
* will be located
*/
tgt = lmv_find_target(lmv, &op_data->op_fid2);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
op_data->op_mds = tgt->ltd_idx;
} else {
CDEBUG(D_CONFIG, "Server doesn't support striped dirs\n");
}
CDEBUG(D_INODE, "CREATE obj "DFID" -> mds #%x\n",
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)
return rc;
CDEBUG(D_INODE, "Created - "DFID"\n", PFID(&op_data->op_fid2));
}
return rc;
}
static int
lmv_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
const union ldlm_policy_data *policy,
struct lookup_intent *it, struct md_op_data *op_data,
struct lustre_handle *lockh, __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 #%u\n",
LL_IT2STR(it), PFID(&op_data->op_fid1), tgt->ltd_idx);
return md_enqueue(tgt->ltd_exp, einfo, policy, it, op_data, lockh,
extra_lock_flags);
}
static int
lmv_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
struct ptlrpc_request **preq)
{
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 #%u\n",
(int)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, preq);
if (rc != 0)
return rc;
body = req_capsule_server_get(&(*preq)->rq_pill, &RMF_MDT_BODY);
if (body->mbo_valid & OBD_MD_MDS) {
struct lu_fid rid = body->mbo_fid1;
CDEBUG(D_INODE, "Request attrs for "DFID"\n",
PFID(&rid));
tgt = lmv_find_target(lmv, &rid);
if (IS_ERR(tgt)) {
ptlrpc_req_finished(*preq);
*preq = NULL;
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(*preq);
*preq = 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 lmv_tgt_desc *tgt,
struct md_op_data *op_data, int op_tgt,
enum ldlm_mode 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;
union ldlm_policy_data policy = { { 0 } };
int rc = 0;
if (!fid_is_sane(fid))
return 0;
if (!tgt) {
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), (int)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();
if (op_data->op_mea2) {
struct lmv_stripe_md *lsm = op_data->op_mea2;
const struct lmv_oinfo *oinfo;
oinfo = lsm_name_to_stripe_info(lsm, op_data->op_name,
op_data->op_namelen);
if (IS_ERR(oinfo))
return PTR_ERR(oinfo);
op_data->op_fid2 = oinfo->lmo_fid;
}
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, NULL, op_data, tgt->ltd_idx, LCK_EX,
MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
if (rc != 0)
return rc;
return md_link(tgt->ltd_exp, op_data, request);
}
static int lmv_rename(struct obd_export *exp, struct md_op_data *op_data,
const char *old, size_t oldlen,
const char *new, size_t newlen,
struct ptlrpc_request **request)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct obd_export *target_exp;
struct lmv_tgt_desc *src_tgt;
struct lmv_tgt_desc *tgt_tgt;
struct mdt_body *body;
int rc;
LASSERT(oldlen != 0);
CDEBUG(D_INODE, "RENAME %.*s in "DFID":%d to %.*s in "DFID":%d\n",
(int)oldlen, old, PFID(&op_data->op_fid1),
op_data->op_mea1 ? op_data->op_mea1->lsm_md_stripe_count : 0,
(int)newlen, new, PFID(&op_data->op_fid2),
op_data->op_mea2 ? op_data->op_mea2->lsm_md_stripe_count : 0);
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();
if (op_data->op_cli_flags & CLI_MIGRATE) {
LASSERTF(fid_is_sane(&op_data->op_fid3), "invalid FID "DFID"\n",
PFID(&op_data->op_fid3));
if (op_data->op_mea1) {
struct lmv_stripe_md *lsm = op_data->op_mea1;
struct lmv_tgt_desc *tmp;
/* Fix the parent fid for striped dir */
tmp = lmv_locate_target_for_name(lmv, lsm, old,
oldlen,
&op_data->op_fid1,
NULL);
if (IS_ERR(tmp))
return PTR_ERR(tmp);
}
rc = lmv_fid_alloc(NULL, exp, &op_data->op_fid2, op_data);
if (rc)
return rc;
src_tgt = lmv_find_target(lmv, &op_data->op_fid3);
if (IS_ERR(src_tgt))
return PTR_ERR(src_tgt);
target_exp = src_tgt->ltd_exp;
} else {
if (op_data->op_mea1) {
struct lmv_stripe_md *lsm = op_data->op_mea1;
src_tgt = lmv_locate_target_for_name(lmv, lsm, old,
oldlen,
&op_data->op_fid1,
&op_data->op_mds);
} else {
src_tgt = lmv_find_target(lmv, &op_data->op_fid1);
}
if (IS_ERR(src_tgt))
return PTR_ERR(src_tgt);
if (op_data->op_mea2) {
struct lmv_stripe_md *lsm = op_data->op_mea2;
tgt_tgt = lmv_locate_target_for_name(lmv, lsm, new,
newlen,
&op_data->op_fid2,
&op_data->op_mds);
} else {
tgt_tgt = lmv_find_target(lmv, &op_data->op_fid2);
}
if (IS_ERR(tgt_tgt))
return PTR_ERR(tgt_tgt);
target_exp = tgt_tgt->ltd_exp;
}
/*
* 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, NULL, op_data, src_tgt->ltd_idx,
LCK_EX, MDS_INODELOCK_UPDATE,
MF_MDC_CANCEL_FID2);
if (rc)
return rc;
/*
* Cancel LOOKUP locks on source child (fid3) for parent tgt_tgt.
*/
if (fid_is_sane(&op_data->op_fid3)) {
struct lmv_tgt_desc *tgt;
tgt = lmv_find_target(lmv, &op_data->op_fid1);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
/* Cancel LOOKUP lock on its parent */
rc = lmv_early_cancel(exp, tgt, op_data, src_tgt->ltd_idx,
LCK_EX, MDS_INODELOCK_LOOKUP,
MF_MDC_CANCEL_FID3);
if (rc)
return rc;
rc = lmv_early_cancel(exp, NULL, op_data, src_tgt->ltd_idx,
LCK_EX, MDS_INODELOCK_FULL,
MF_MDC_CANCEL_FID3);
if (rc)
return rc;
}
retry_rename:
/*
* Cancel all the locks on tgt child (fid4).
*/
if (fid_is_sane(&op_data->op_fid4)) {
struct lmv_tgt_desc *tgt;
rc = lmv_early_cancel(exp, NULL, op_data, src_tgt->ltd_idx,
LCK_EX, MDS_INODELOCK_FULL,
MF_MDC_CANCEL_FID4);
if (rc)
return rc;
tgt = lmv_find_target(lmv, &op_data->op_fid4);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
/*
* Since the target child might be destroyed, and it might
* become orphan, and we can only check orphan on the local
* MDT right now, so we send rename request to the MDT where
* target child is located. If target child does not exist,
* then it will send the request to the target parent
*/
target_exp = tgt->ltd_exp;
}
rc = md_rename(target_exp, op_data, old, oldlen, new, newlen, request);
if (rc && rc != -EREMOTE)
return rc;
body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
if (!body)
return -EPROTO;
/* Not cross-ref case, just get out of here. */
if (likely(!(body->mbo_valid & OBD_MD_MDS)))
return rc;
CDEBUG(D_INODE, "%s: try rename to another MDT for " DFID "\n",
exp->exp_obd->obd_name, PFID(&body->mbo_fid1));
op_data->op_fid4 = body->mbo_fid1;
ptlrpc_req_finished(*request);
*request = NULL;
goto retry_rename;
}
static int lmv_setattr(struct obd_export *exp, struct md_op_data *op_data,
void *ea, size_t ealen, 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;
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);
return md_setattr(tgt->ltd_exp, op_data, ea, ealen, request);
}
static int lmv_sync(struct obd_export *exp, const struct lu_fid *fid,
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);
return md_sync(tgt->ltd_exp, fid, request);
}
/**
* Get current minimum entry from striped directory
*
* This function will search the dir entry, whose hash value is the
* closest(>=) to @hash_offset, from all of sub-stripes, and it is
* only being called for striped directory.
*
* \param[in] exp export of LMV
* \param[in] op_data parameters transferred beween client MD stack
* stripe_information will be included in this
* parameter
* \param[in] cb_op ldlm callback being used in enqueue in
* mdc_read_page
* \param[in] hash_offset the hash value, which is used to locate
* minum(closet) dir entry
* \param[in|out] stripe_offset the caller use this to indicate the stripe
* index of last entry, so to avoid hash conflict
* between stripes. It will also be used to
* return the stripe index of current dir entry.
* \param[in|out] entp the minum entry and it also is being used
* to input the last dir entry to resolve the
* hash conflict
*
* \param[out] ppage the page which holds the minum entry
*
* \retval = 0 get the entry successfully
* negative errno (< 0) does not get the entry
*/
static int lmv_get_min_striped_entry(struct obd_export *exp,
struct md_op_data *op_data,
struct md_callback *cb_op,
__u64 hash_offset, int *stripe_offset,
struct lu_dirent **entp,
struct page **ppage)
{
struct lmv_stripe_md *lsm = op_data->op_mea1;
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lu_dirent *min_ent = NULL;
struct page *min_page = NULL;
struct lmv_tgt_desc *tgt;
int stripe_count;
int min_idx = 0;
int rc = 0;
int i;
stripe_count = lsm->lsm_md_stripe_count;
for (i = 0; i < stripe_count; i++) {
__u64 stripe_hash = hash_offset;
struct lu_dirent *ent = NULL;
struct page *page = NULL;
struct lu_dirpage *dp;
tgt = lmv_get_target(lmv, lsm->lsm_md_oinfo[i].lmo_mds, NULL);
if (IS_ERR(tgt)) {
rc = PTR_ERR(tgt);
goto out;
}
/*
* op_data will be shared by each stripe, so we need
* reset these value for each stripe
*/
op_data->op_fid1 = lsm->lsm_md_oinfo[i].lmo_fid;
op_data->op_fid2 = lsm->lsm_md_oinfo[i].lmo_fid;
op_data->op_data = lsm->lsm_md_oinfo[i].lmo_root;
next:
rc = md_read_page(tgt->ltd_exp, op_data, cb_op, stripe_hash,
&page);
if (rc)
goto out;
dp = page_address(page);
for (ent = lu_dirent_start(dp); ent;
ent = lu_dirent_next(ent)) {
/* Skip dummy entry */
if (!le16_to_cpu(ent->lde_namelen))
continue;
if (le64_to_cpu(ent->lde_hash) < hash_offset)
continue;
if (le64_to_cpu(ent->lde_hash) == hash_offset &&
(*entp == ent || i < *stripe_offset))
continue;
/* skip . and .. for other stripes */
if (i && (!strncmp(ent->lde_name, ".",
le16_to_cpu(ent->lde_namelen)) ||
!strncmp(ent->lde_name, "..",
le16_to_cpu(ent->lde_namelen))))
continue;
break;
}
if (!ent) {
stripe_hash = le64_to_cpu(dp->ldp_hash_end);
kunmap(page);
put_page(page);
page = NULL;
/*
* reach the end of current stripe, go to next stripe
*/
if (stripe_hash == MDS_DIR_END_OFF)
continue;
else
goto next;
}
if (min_ent) {
if (le64_to_cpu(min_ent->lde_hash) >
le64_to_cpu(ent->lde_hash)) {
min_ent = ent;
kunmap(min_page);
put_page(min_page);
min_idx = i;
min_page = page;
} else {
kunmap(page);
put_page(page);
page = NULL;
}
} else {
min_ent = ent;
min_page = page;
min_idx = i;
}
}
out:
if (*ppage) {
kunmap(*ppage);
put_page(*ppage);
}
*stripe_offset = min_idx;
*entp = min_ent;
*ppage = min_page;
return rc;
}
/**
* Build dir entry page from a striped directory
*
* This function gets one entry by @offset from a striped directory. It will
* read entries from all of stripes, and choose one closest to the required
* offset(&offset). A few notes
* 1. skip . and .. for non-zero stripes, because there can only have one .
* and .. in a directory.
* 2. op_data will be shared by all of stripes, instead of allocating new
* one, so need to restore before reusing.
* 3. release the entry page if that is not being chosen.
*
* \param[in] exp obd export refer to LMV
* \param[in] op_data hold those MD parameters of read_entry
* \param[in] cb_op ldlm callback being used in enqueue in mdc_read_entry
* \param[out] ldp the entry being read
* \param[out] ppage the page holding the entry. Note: because the entry
* will be accessed in upper layer, so we need hold the
* page until the usages of entry is finished, see
* ll_dir_entry_next.
*
* retval =0 if get entry successfully
* <0 cannot get entry
*/
static int lmv_read_striped_page(struct obd_export *exp,
struct md_op_data *op_data,
struct md_callback *cb_op,
__u64 offset, struct page **ppage)
{
struct inode *master_inode = op_data->op_data;
struct lu_fid master_fid = op_data->op_fid1;
struct obd_device *obd = exp->exp_obd;
__u64 hash_offset = offset;
struct page *min_ent_page = NULL;
struct page *ent_page = NULL;
struct lu_dirent *min_ent = NULL;
struct lu_dirent *last_ent;
struct lu_dirent *ent;
struct lu_dirpage *dp;
size_t left_bytes;
int ent_idx = 0;
void *area;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
/*
* Allocate a page and read entries from all of stripes and fill
* the page by hash order
*/
ent_page = alloc_page(GFP_KERNEL);
if (!ent_page)
return -ENOMEM;
/* Initialize the entry page */
dp = kmap(ent_page);
memset(dp, 0, sizeof(*dp));
dp->ldp_hash_start = cpu_to_le64(offset);
dp->ldp_flags |= LDF_COLLIDE;
area = dp + 1;
left_bytes = PAGE_SIZE - sizeof(*dp);
ent = area;
last_ent = ent;
do {
__u16 ent_size;
/* Find the minum entry from all sub-stripes */
rc = lmv_get_min_striped_entry(exp, op_data, cb_op, hash_offset,
&ent_idx, &min_ent,
&min_ent_page);
if (rc)
goto out;
/*
* If it can not get minum entry, it means it already reaches
* the end of this directory
*/
if (!min_ent) {
last_ent->lde_reclen = 0;
hash_offset = MDS_DIR_END_OFF;
goto out;
}
ent_size = le16_to_cpu(min_ent->lde_reclen);
/*
* the last entry lde_reclen is 0, but it might not
* the end of this entry of this temporay entry
*/
if (!ent_size)
ent_size = lu_dirent_calc_size(
le16_to_cpu(min_ent->lde_namelen),
le32_to_cpu(min_ent->lde_attrs));
if (ent_size > left_bytes) {
last_ent->lde_reclen = cpu_to_le16(0);
hash_offset = le64_to_cpu(min_ent->lde_hash);
goto out;
}
memcpy(ent, min_ent, ent_size);
/*
* Replace . with master FID and Replace .. with the parent FID
* of master object
*/
if (!strncmp(ent->lde_name, ".",
le16_to_cpu(ent->lde_namelen)) &&
le16_to_cpu(ent->lde_namelen) == 1)
fid_cpu_to_le(&ent->lde_fid, &master_fid);
else if (!strncmp(ent->lde_name, "..",
le16_to_cpu(ent->lde_namelen)) &&
le16_to_cpu(ent->lde_namelen) == 2)
fid_cpu_to_le(&ent->lde_fid, &op_data->op_fid3);
left_bytes -= ent_size;
ent->lde_reclen = cpu_to_le16(ent_size);
last_ent = ent;
ent = (void *)ent + ent_size;
hash_offset = le64_to_cpu(min_ent->lde_hash);
if (hash_offset == MDS_DIR_END_OFF) {
last_ent->lde_reclen = 0;
break;
}
} while (1);
out:
if (min_ent_page) {
kunmap(min_ent_page);
put_page(min_ent_page);
}
if (unlikely(rc)) {
__free_page(ent_page);
ent_page = NULL;
} else {
if (ent == area)
dp->ldp_flags |= LDF_EMPTY;
dp->ldp_flags = cpu_to_le32(dp->ldp_flags);
dp->ldp_hash_end = cpu_to_le64(hash_offset);
}
/*
* We do not want to allocate md_op_data during each
* dir entry reading, so op_data will be shared by every stripe,
* then we need to restore it back to original value before
* return to the upper layer
*/
op_data->op_fid1 = master_fid;
op_data->op_fid2 = master_fid;
op_data->op_data = master_inode;
*ppage = ent_page;
return rc;
}
static int lmv_read_page(struct obd_export *exp, struct md_op_data *op_data,
struct md_callback *cb_op, __u64 offset,
struct page **ppage)
{
struct lmv_stripe_md *lsm = op_data->op_mea1;
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 (unlikely(lsm)) {
return lmv_read_striped_page(exp, op_data, cb_op, offset, ppage);
}
tgt = lmv_find_target(lmv, &op_data->op_fid1);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
return md_read_page(tgt->ltd_exp, op_data, cb_op, offset, ppage);
}
/**
* Unlink a file/directory
*
* Unlink a file or directory under the parent dir. The unlink request
* usually will be sent to the MDT where the child is located, but if
* the client does not have the child FID then request will be sent to the
* MDT where the parent is located.
*
* If the parent is a striped directory then it also needs to locate which
* stripe the name of the child is located, and replace the parent FID
* (@op->op_fid1) with the stripe FID. Note: if the stripe is unknown,
* it will walk through all of sub-stripes until the child is being
* unlinked finally.
*
* \param[in] exp export refer to LMV
* \param[in] op_data different parameters transferred beween client
* MD stacks, name, namelen, FIDs etc.
* op_fid1 is the parent FID, op_fid2 is the child
* FID.
* \param[out] request point to the request of unlink.
*
* retval 0 if succeed
* negative errno if failed.
*/
static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
struct ptlrpc_request **request)
{
struct lmv_stripe_md *lsm = op_data->op_mea1;
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *parent_tgt = NULL;
struct lmv_tgt_desc *tgt = NULL;
struct mdt_body *body;
int stripe_index = 0;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
retry_unlink:
/* For striped dir, we need to locate the parent as well */
if (lsm) {
struct lmv_tgt_desc *tmp;
LASSERT(op_data->op_name && op_data->op_namelen);
tmp = lmv_locate_target_for_name(lmv, lsm,
op_data->op_name,
op_data->op_namelen,
&op_data->op_fid1,
&op_data->op_mds);
/*
* return -EBADFD means unknown hash type, might
* need try all sub-stripe here
*/
if (IS_ERR(tmp) && PTR_ERR(tmp) != -EBADFD)
return PTR_ERR(tmp);
/*
* Note: both migrating dir and unknown hash dir need to
* try all of sub-stripes, so we need start search the
* name from stripe 0, but migrating dir is already handled
* inside lmv_locate_target_for_name(), so we only check
* unknown hash type directory here
*/
if (!lmv_is_known_hash_type(lsm->lsm_md_hash_type)) {
struct lmv_oinfo *oinfo;
oinfo = &lsm->lsm_md_oinfo[stripe_index];
op_data->op_fid1 = oinfo->lmo_fid;
op_data->op_mds = oinfo->lmo_mds;
}
}
try_next_stripe:
/* Send unlink requests to the MDT where the child is located */
if (likely(!fid_is_zero(&op_data->op_fid2)))
tgt = lmv_find_target(lmv, &op_data->op_fid2);
else if (lsm)
tgt = lmv_get_target(lmv, op_data->op_mds, NULL);
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).
*/
parent_tgt = lmv_find_target(lmv, &op_data->op_fid1);
if (IS_ERR(parent_tgt))
return PTR_ERR(parent_tgt);
if (parent_tgt != tgt) {
rc = lmv_early_cancel(exp, parent_tgt, op_data, tgt->ltd_idx,
LCK_EX, MDS_INODELOCK_LOOKUP,
MF_MDC_CANCEL_FID3);
}
rc = lmv_early_cancel(exp, NULL, 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 #%u\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 && rc != -ENOENT)
return rc;
/* Try next stripe if it is needed. */
if (rc == -ENOENT && lsm && lmv_need_try_all_stripes(lsm)) {
struct lmv_oinfo *oinfo;
stripe_index++;
if (stripe_index >= lsm->lsm_md_stripe_count)
return rc;
oinfo = &lsm->lsm_md_oinfo[stripe_index];
op_data->op_fid1 = oinfo->lmo_fid;
op_data->op_mds = oinfo->lmo_mds;
ptlrpc_req_finished(*request);
*request = NULL;
goto try_next_stripe;
}
body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
if (!body)
return -EPROTO;
/* Not cross-ref case, just get out of here. */
if (likely(!(body->mbo_valid & OBD_MD_MDS)))
return rc;
CDEBUG(D_INODE, "%s: try unlink to another MDT for "DFID"\n",
exp->exp_obd->obd_name, PFID(&body->mbo_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->mbo_fid1;
ptlrpc_req_finished(*request);
*request = NULL;
goto retry_unlink;
}
static int lmv_precleanup(struct obd_device *obd)
{
fld_client_debugfs_fini(&obd->u.lmv.lmv_fld);
lprocfs_obd_cleanup(obd);
return 0;
}
/**
* Get by key a value associated with a LMV device.
*
* Dispatch request to lower-layer devices as needed.
*
* \param[in] env execution environment for this thread
* \param[in] exp export for the LMV device
* \param[in] keylen length of key identifier
* \param[in] key identifier of key to get value for
* \param[in] vallen size of \a val
* \param[out] val pointer to storage location for value
*
* \retval 0 on success
* \retval negative negated errno on failure
*/
static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
__u32 keylen, void *key, __u32 *vallen, void *val)
{
struct obd_device *obd;
struct lmv_obd *lmv;
int rc = 0;
obd = class_exp2obd(exp);
if (!obd) {
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")) {
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++) {
struct lmv_tgt_desc *tgt = lmv->tgts[i];
/*
* All tgts should be connected when this gets called.
*/
if (!tgt || !tgt->ltd_exp)
continue;
if (!obd_get_info(env, tgt->ltd_exp, keylen, key,
vallen, val))
return 0;
}
return -EINVAL;
} else if (KEY_IS(KEY_MAX_EASIZE) ||
KEY_IS(KEY_DEFAULT_EASIZE) ||
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);
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;
}
/**
* Asynchronously set by key a value associated with a LMV device.
*
* Dispatch request to lower-layer devices as needed.
*
* \param[in] env execution environment for this thread
* \param[in] exp export for the LMV device
* \param[in] keylen length of key identifier
* \param[in] key identifier of key to store value for
* \param[in] vallen size of value to store
* \param[in] val pointer to data to be stored
* \param[in] set optional list of related ptlrpc requests
*
* \retval 0 on success
* \retval negative negated errno on failure
*/
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) {
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) ||
KEY_IS(KEY_DEFAULT_EASIZE)) {
int i, err = 0;
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
tgt = lmv->tgts[i];
if (!tgt || !tgt->ltd_exp)
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_unpack_md_v1(struct obd_export *exp, struct lmv_stripe_md *lsm,
const struct lmv_mds_md_v1 *lmm1)
{
struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
int stripe_count;
int rc = 0;
int cplen;
int i;
lsm->lsm_md_magic = le32_to_cpu(lmm1->lmv_magic);
lsm->lsm_md_stripe_count = le32_to_cpu(lmm1->lmv_stripe_count);
lsm->lsm_md_master_mdt_index = le32_to_cpu(lmm1->lmv_master_mdt_index);
if (OBD_FAIL_CHECK(OBD_FAIL_UNKNOWN_LMV_STRIPE))
lsm->lsm_md_hash_type = LMV_HASH_TYPE_UNKNOWN;
else
lsm->lsm_md_hash_type = le32_to_cpu(lmm1->lmv_hash_type);
lsm->lsm_md_layout_version = le32_to_cpu(lmm1->lmv_layout_version);
cplen = strlcpy(lsm->lsm_md_pool_name, lmm1->lmv_pool_name,
sizeof(lsm->lsm_md_pool_name));
if (cplen >= sizeof(lsm->lsm_md_pool_name))
return -E2BIG;
CDEBUG(D_INFO, "unpack lsm count %d, master %d hash_type %d layout_version %d\n",
lsm->lsm_md_stripe_count, lsm->lsm_md_master_mdt_index,
lsm->lsm_md_hash_type, lsm->lsm_md_layout_version);
stripe_count = le32_to_cpu(lmm1->lmv_stripe_count);
for (i = 0; i < stripe_count; i++) {
fid_le_to_cpu(&lsm->lsm_md_oinfo[i].lmo_fid,
&lmm1->lmv_stripe_fids[i]);
rc = lmv_fld_lookup(lmv, &lsm->lsm_md_oinfo[i].lmo_fid,
&lsm->lsm_md_oinfo[i].lmo_mds);
if (rc)
return rc;
CDEBUG(D_INFO, "unpack fid #%d "DFID"\n", i,
PFID(&lsm->lsm_md_oinfo[i].lmo_fid));
}
return rc;
}
static int lmv_unpackmd(struct obd_export *exp, struct lmv_stripe_md **lsmp,
const union lmv_mds_md *lmm, size_t lmm_size)
{
struct lmv_stripe_md *lsm;
bool allocated = false;
int lsm_size, rc;
LASSERT(lsmp);
lsm = *lsmp;
/* Free memmd */
if (lsm && !lmm) {
int i;
for (i = 1; i < lsm->lsm_md_stripe_count; i++) {
/*
* For migrating inode, the master stripe and master
* object will be the same, so do not need iput, see
* ll_update_lsm_md
*/
if (!(lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION &&
!i) && lsm->lsm_md_oinfo[i].lmo_root)
iput(lsm->lsm_md_oinfo[i].lmo_root);
}
kvfree(lsm);
*lsmp = NULL;
return 0;
}
if (le32_to_cpu(lmm->lmv_magic) == LMV_MAGIC_STRIPE)
return -EPERM;
/* Unpack memmd */
if (le32_to_cpu(lmm->lmv_magic) != LMV_MAGIC_V1 &&
le32_to_cpu(lmm->lmv_magic) != LMV_USER_MAGIC) {
CERROR("%s: invalid lmv magic %x: rc = %d\n",
exp->exp_obd->obd_name, le32_to_cpu(lmm->lmv_magic),
-EIO);
return -EIO;
}
if (le32_to_cpu(lmm->lmv_magic) == LMV_MAGIC_V1)
lsm_size = lmv_stripe_md_size(lmv_mds_md_stripe_count_get(lmm));
else
/**
* Unpack default dirstripe(lmv_user_md) to lmv_stripe_md,
* stripecount should be 0 then.
*/
lsm_size = lmv_stripe_md_size(0);
if (!lsm) {
lsm = libcfs_kvzalloc(lsm_size, GFP_NOFS);
if (!lsm)
return -ENOMEM;
allocated = true;
*lsmp = lsm;
}
switch (le32_to_cpu(lmm->lmv_magic)) {
case LMV_MAGIC_V1:
rc = lmv_unpack_md_v1(exp, lsm, &lmm->lmv_md_v1);
break;
default:
CERROR("%s: unrecognized magic %x\n", exp->exp_obd->obd_name,
le32_to_cpu(lmm->lmv_magic));
rc = -EINVAL;
break;
}
if (rc && allocated) {
kvfree(lsm);
*lsmp = NULL;
lsm_size = rc;
}
return lsm_size;
}
void lmv_free_memmd(struct lmv_stripe_md *lsm)
{
lmv_unpackmd(NULL, &lsm, NULL, 0);
}
EXPORT_SYMBOL(lmv_free_memmd);
static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
union ldlm_policy_data *policy,
enum ldlm_mode mode, enum ldlm_cancel_flags flags,
void *opaque)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
int rc = 0;
int err;
u32 i;
LASSERT(fid);
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
struct lmv_tgt_desc *tgt = lmv->tgts[i];
if (!tgt || !tgt->ltd_exp || !tgt->ltd_active)
continue;
err = md_cancel_unused(tgt->ltd_exp, fid, policy, mode, flags,
opaque);
if (!rc)
rc = err;
}
return rc;
}
static int lmv_set_lock_data(struct obd_export *exp,
const struct lustre_handle *lockh,
void *data, __u64 *bits)
{
struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
struct lmv_tgt_desc *tgt = lmv->tgts[0];
if (!tgt || !tgt->ltd_exp)
return -EINVAL;
return md_set_lock_data(tgt->ltd_exp, lockh, data, bits);
}
static enum ldlm_mode lmv_lock_match(struct obd_export *exp, __u64 flags,
const struct lu_fid *fid,
enum ldlm_type type,
union ldlm_policy_data *policy,
enum ldlm_mode mode,
struct lustre_handle *lockh)
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
enum ldlm_mode rc;
int tgt;
u32 i;
CDEBUG(D_INODE, "Lock match 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. Try the MDT that the FID maps to first,
* since this can be easily found, and only try others if that fails.
*/
for (i = 0, tgt = lmv_find_target_index(lmv, fid);
i < lmv->desc.ld_tgt_count;
i++, tgt = (tgt + 1) % lmv->desc.ld_tgt_count) {
if (tgt < 0) {
CDEBUG(D_HA, "%s: "DFID" is inaccessible: rc = %d\n",
obd->obd_name, PFID(fid), tgt);
tgt = 0;
}
if (!lmv->tgts[tgt] || !lmv->tgts[tgt]->ltd_exp ||
!lmv->tgts[tgt]->ltd_active)
continue;
rc = md_lock_match(lmv->tgts[tgt]->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;
struct lmv_tgt_desc *tgt = lmv->tgts[0];
if (!tgt || !tgt->ltd_exp)
return -EINVAL;
return md_get_lustre_md(tgt->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;
struct lmv_tgt_desc *tgt = lmv->tgts[0];
if (md->lmv) {
lmv_free_memmd(md->lmv);
md->lmv = NULL;
}
if (!tgt || !tgt->ltd_exp)
return -EINVAL;
return md_free_lustre_md(tgt->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_intent_getattr_async(struct obd_export *exp,
struct md_enqueue_info *minfo)
{
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 *ptgt = NULL;
struct lmv_tgt_desc *ctgt = NULL;
int rc;
if (!fid_is_sane(&op_data->op_fid2))
return -EINVAL;
rc = lmv_check_connect(obd);
if (rc)
return rc;
ptgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
if (IS_ERR(ptgt))
return PTR_ERR(ptgt);
ctgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid2);
if (IS_ERR(ctgt))
return PTR_ERR(ctgt);
/*
* if child is on remote MDT, we need 2 async RPCs to fetch both LOOKUP
* lock on parent, and UPDATE lock on child MDT, which makes all
* complicated. Considering remote dir is rare case, and not supporting
* it in statahead won't cause any issue, drop its support for now.
*/
if (ptgt != ctgt)
return -ENOTSUPP;
return md_intent_getattr_async(ptgt->ltd_exp, minfo);
}
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);
return md_revalidate_lock(tgt->ltd_exp, it, fid, bits);
}
static int
lmv_get_fid_from_lsm(struct obd_export *exp,
const struct lmv_stripe_md *lsm,
const char *name, int namelen, struct lu_fid *fid)
{
const struct lmv_oinfo *oinfo;
LASSERT(lsm);
oinfo = lsm_name_to_stripe_info(lsm, name, namelen);
if (IS_ERR(oinfo))
return PTR_ERR(oinfo);
*fid = oinfo->lmo_fid;
return 0;
}
/**
* 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;
__u64 curspace = 0, curinodes = 0;
u32 i;
if (!tgt || !tgt->ltd_exp || !tgt->ltd_active ||
!lmv->desc.ld_tgt_count) {
CERROR("master lmv inactive\n");
return -EIO;
}
if (oqctl->qc_cmd != Q_GETOQUOTA) {
return obd_quotactl(tgt->ltd_exp, oqctl);
}
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
int err;
tgt = lmv->tgts[i];
if (!tgt || !tgt->ltd_exp || !tgt->ltd_active)
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_merge_attr(struct obd_export *exp,
const struct lmv_stripe_md *lsm,
struct cl_attr *attr,
ldlm_blocking_callback cb_blocking)
{
int rc, i;
rc = lmv_revalidate_slaves(exp, lsm, cb_blocking, 0);
if (rc < 0)
return rc;
for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
struct inode *inode = lsm->lsm_md_oinfo[i].lmo_root;
CDEBUG(D_INFO, ""DFID" size %llu, blocks %llu nlink %u, atime %lu ctime %lu, mtime %lu.\n",
PFID(&lsm->lsm_md_oinfo[i].lmo_fid),
i_size_read(inode), (unsigned long long)inode->i_blocks,
inode->i_nlink, LTIME_S(inode->i_atime),
LTIME_S(inode->i_ctime), LTIME_S(inode->i_mtime));
/* for slave stripe, it needs to subtract nlink for . and .. */
if (i)
attr->cat_nlink += inode->i_nlink - 2;
else
attr->cat_nlink = inode->i_nlink;
attr->cat_size += i_size_read(inode);
attr->cat_blocks += inode->i_blocks;
if (attr->cat_atime < LTIME_S(inode->i_atime))
attr->cat_atime = LTIME_S(inode->i_atime);
if (attr->cat_ctime < LTIME_S(inode->i_ctime))
attr->cat_ctime = LTIME_S(inode->i_ctime);
if (attr->cat_mtime < LTIME_S(inode->i_mtime))
attr->cat_mtime = LTIME_S(inode->i_mtime);
}
return 0;
}
static struct obd_ops lmv_obd_ops = {
.owner = THIS_MODULE,
.setup = lmv_setup,
.cleanup = lmv_cleanup,
.precleanup = lmv_precleanup,
.process_config = lmv_process_config,
.connect = lmv_connect,
.disconnect = lmv_disconnect,
.statfs = lmv_statfs,
.get_info = lmv_get_info,
.set_info_async = lmv_set_info_async,
.notify = lmv_notify,
.get_uuid = lmv_get_uuid,
.iocontrol = lmv_iocontrol,
.quotactl = lmv_quotactl
};
static struct md_ops lmv_md_ops = {
.getstatus = lmv_getstatus,
.null_inode = lmv_null_inode,
.close = lmv_close,
.create = lmv_create,
.enqueue = lmv_enqueue,
.getattr = lmv_getattr,
.getxattr = lmv_getxattr,
.getattr_name = lmv_getattr_name,
.intent_lock = lmv_intent_lock,
.link = lmv_link,
.rename = lmv_rename,
.setattr = lmv_setattr,
.setxattr = lmv_setxattr,
.sync = lmv_sync,
.read_page = lmv_read_page,
.unlink = lmv_unlink,
.init_ea_size = lmv_init_ea_size,
.cancel_unused = lmv_cancel_unused,
.set_lock_data = lmv_set_lock_data,
.lock_match = lmv_lock_match,
.get_lustre_md = lmv_get_lustre_md,
.free_lustre_md = lmv_free_lustre_md,
.merge_attr = lmv_merge_attr,
.set_open_replay_data = lmv_set_open_replay_data,
.clear_open_replay_data = lmv_clear_open_replay_data,
.intent_getattr_async = lmv_intent_getattr_async,
.revalidate_lock = lmv_revalidate_lock,
.get_fid_from_lsm = lmv_get_fid_from_lsm,
.unpackmd = lmv_unpackmd,
};
static int __init lmv_init(void)
{
struct lprocfs_static_vars lvars;
lprocfs_lmv_init_vars(&lvars);
return class_register_type(&lmv_obd_ops, &lmv_md_ops,
LUSTRE_LMV_NAME, NULL);
}
static void lmv_exit(void)
{
class_unregister_type(LUSTRE_LMV_NAME);
}
MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
MODULE_DESCRIPTION("Lustre Logical Metadata Volume");
MODULE_VERSION(LUSTRE_VERSION_STRING);
MODULE_LICENSE("GPL");
module_init(lmv_init);
module_exit(lmv_exit);
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