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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.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) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2010, 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*/
/**
* This file deals with various client/target related logic including recovery.
*
* TODO: This code more logically belongs in the ptlrpc module than in ldlm and
* should be moved.
*/
#define DEBUG_SUBSYSTEM S_LDLM
#include "../../include/linux/libcfs/libcfs.h"
#include "../include/obd.h"
#include "../include/obd_class.h"
#include "../include/lustre_dlm.h"
#include "../include/lustre_net.h"
#include "../include/lustre_sec.h"
#include "ldlm_internal.h"
/* @priority: If non-zero, move the selected connection to the list head.
* @create: If zero, only search in existing connections.
*/
static int import_set_conn(struct obd_import *imp, struct obd_uuid *uuid,
int priority, int create)
{
struct ptlrpc_connection *ptlrpc_conn;
struct obd_import_conn *imp_conn = NULL, *item;
int rc = 0;
if (!create && !priority) {
CDEBUG(D_HA, "Nothing to do\n");
return -EINVAL;
}
ptlrpc_conn = ptlrpc_uuid_to_connection(uuid);
if (!ptlrpc_conn) {
CDEBUG(D_HA, "can't find connection %s\n", uuid->uuid);
return -ENOENT;
}
if (create) {
imp_conn = kzalloc(sizeof(*imp_conn), GFP_NOFS);
if (!imp_conn) {
rc = -ENOMEM;
goto out_put;
}
}
spin_lock(&imp->imp_lock);
list_for_each_entry(item, &imp->imp_conn_list, oic_item) {
if (obd_uuid_equals(uuid, &item->oic_uuid)) {
if (priority) {
list_del(&item->oic_item);
list_add(&item->oic_item,
&imp->imp_conn_list);
item->oic_last_attempt = 0;
}
CDEBUG(D_HA, "imp %p@%s: found existing conn %s%s\n",
imp, imp->imp_obd->obd_name, uuid->uuid,
(priority ? ", moved to head" : ""));
spin_unlock(&imp->imp_lock);
rc = 0;
goto out_free;
}
}
/* No existing import connection found for \a uuid. */
if (create) {
imp_conn->oic_conn = ptlrpc_conn;
imp_conn->oic_uuid = *uuid;
imp_conn->oic_last_attempt = 0;
if (priority)
list_add(&imp_conn->oic_item, &imp->imp_conn_list);
else
list_add_tail(&imp_conn->oic_item,
&imp->imp_conn_list);
CDEBUG(D_HA, "imp %p@%s: add connection %s at %s\n",
imp, imp->imp_obd->obd_name, uuid->uuid,
(priority ? "head" : "tail"));
} else {
spin_unlock(&imp->imp_lock);
rc = -ENOENT;
goto out_free;
}
spin_unlock(&imp->imp_lock);
return 0;
out_free:
kfree(imp_conn);
out_put:
ptlrpc_connection_put(ptlrpc_conn);
return rc;
}
int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid)
{
return import_set_conn(imp, uuid, 1, 0);
}
int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
int priority)
{
return import_set_conn(imp, uuid, priority, 1);
}
EXPORT_SYMBOL(client_import_add_conn);
int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
{
struct obd_import_conn *imp_conn;
struct obd_export *dlmexp;
int rc = -ENOENT;
spin_lock(&imp->imp_lock);
if (list_empty(&imp->imp_conn_list)) {
LASSERT(!imp->imp_connection);
goto out;
}
list_for_each_entry(imp_conn, &imp->imp_conn_list, oic_item) {
if (!obd_uuid_equals(uuid, &imp_conn->oic_uuid))
continue;
LASSERT(imp_conn->oic_conn);
if (imp_conn == imp->imp_conn_current) {
LASSERT(imp_conn->oic_conn == imp->imp_connection);
if (imp->imp_state != LUSTRE_IMP_CLOSED &&
imp->imp_state != LUSTRE_IMP_DISCON) {
CERROR("can't remove current connection\n");
rc = -EBUSY;
goto out;
}
ptlrpc_connection_put(imp->imp_connection);
imp->imp_connection = NULL;
dlmexp = class_conn2export(&imp->imp_dlm_handle);
if (dlmexp && dlmexp->exp_connection) {
LASSERT(dlmexp->exp_connection ==
imp_conn->oic_conn);
ptlrpc_connection_put(dlmexp->exp_connection);
dlmexp->exp_connection = NULL;
}
}
list_del(&imp_conn->oic_item);
ptlrpc_connection_put(imp_conn->oic_conn);
kfree(imp_conn);
CDEBUG(D_HA, "imp %p@%s: remove connection %s\n",
imp, imp->imp_obd->obd_name, uuid->uuid);
rc = 0;
break;
}
out:
spin_unlock(&imp->imp_lock);
if (rc == -ENOENT)
CERROR("connection %s not found\n", uuid->uuid);
return rc;
}
EXPORT_SYMBOL(client_import_del_conn);
/**
* Find conn UUID by peer NID. \a peer is a server NID. This function is used
* to find a conn uuid of \a imp which can reach \a peer.
*/
int client_import_find_conn(struct obd_import *imp, lnet_nid_t peer,
struct obd_uuid *uuid)
{
struct obd_import_conn *conn;
int rc = -ENOENT;
spin_lock(&imp->imp_lock);
list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
/* Check if conn UUID does have this peer NID. */
if (class_check_uuid(&conn->oic_uuid, peer)) {
*uuid = conn->oic_uuid;
rc = 0;
break;
}
}
spin_unlock(&imp->imp_lock);
return rc;
}
EXPORT_SYMBOL(client_import_find_conn);
void client_destroy_import(struct obd_import *imp)
{
/* Drop security policy instance after all RPCs have finished/aborted
* to let all busy contexts be released. */
class_import_get(imp);
class_destroy_import(imp);
sptlrpc_import_sec_put(imp);
class_import_put(imp);
}
EXPORT_SYMBOL(client_destroy_import);
/**
* Check whether or not the OSC is on MDT.
* In the config log,
* osc on MDT
* setup 0:{fsname}-OSTxxxx-osc[-MDTxxxx] 1:lustre-OST0000_UUID 2:NID
* osc on client
* setup 0:{fsname}-OSTxxxx-osc 1:lustre-OST0000_UUID 2:NID
*
**/
static int osc_on_mdt(char *obdname)
{
char *ptr;
ptr = strrchr(obdname, '-');
if (ptr == NULL)
return 0;
if (strncmp(ptr + 1, "MDT", 3) == 0)
return 1;
return 0;
}
/* Configure an RPC client OBD device.
*
* lcfg parameters:
* 1 - client UUID
* 2 - server UUID
* 3 - inactive-on-startup
*/
int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
{
struct client_obd *cli = &obddev->u.cli;
struct obd_import *imp;
struct obd_uuid server_uuid;
int rq_portal, rp_portal, connect_op;
char *name = obddev->obd_type->typ_name;
ldlm_ns_type_t ns_type = LDLM_NS_TYPE_UNKNOWN;
int rc;
/* In a more perfect world, we would hang a ptlrpc_client off of
* obd_type and just use the values from there. */
if (!strcmp(name, LUSTRE_OSC_NAME)) {
rq_portal = OST_REQUEST_PORTAL;
rp_portal = OSC_REPLY_PORTAL;
connect_op = OST_CONNECT;
cli->cl_sp_me = LUSTRE_SP_CLI;
cli->cl_sp_to = LUSTRE_SP_OST;
ns_type = LDLM_NS_TYPE_OSC;
} else if (!strcmp(name, LUSTRE_MDC_NAME) ||
!strcmp(name, LUSTRE_LWP_NAME)) {
rq_portal = MDS_REQUEST_PORTAL;
rp_portal = MDC_REPLY_PORTAL;
connect_op = MDS_CONNECT;
cli->cl_sp_me = LUSTRE_SP_CLI;
cli->cl_sp_to = LUSTRE_SP_MDT;
ns_type = LDLM_NS_TYPE_MDC;
} else if (!strcmp(name, LUSTRE_OSP_NAME)) {
if (strstr(lustre_cfg_buf(lcfg, 1), "OST") == NULL) {
/* OSP_on_MDT for other MDTs */
connect_op = MDS_CONNECT;
cli->cl_sp_to = LUSTRE_SP_MDT;
ns_type = LDLM_NS_TYPE_MDC;
rq_portal = OUT_PORTAL;
} else {
/* OSP on MDT for OST */
connect_op = OST_CONNECT;
cli->cl_sp_to = LUSTRE_SP_OST;
ns_type = LDLM_NS_TYPE_OSC;
rq_portal = OST_REQUEST_PORTAL;
}
rp_portal = OSC_REPLY_PORTAL;
cli->cl_sp_me = LUSTRE_SP_CLI;
} else if (!strcmp(name, LUSTRE_MGC_NAME)) {
rq_portal = MGS_REQUEST_PORTAL;
rp_portal = MGC_REPLY_PORTAL;
connect_op = MGS_CONNECT;
cli->cl_sp_me = LUSTRE_SP_MGC;
cli->cl_sp_to = LUSTRE_SP_MGS;
cli->cl_flvr_mgc.sf_rpc = SPTLRPC_FLVR_INVALID;
ns_type = LDLM_NS_TYPE_MGC;
} else {
CERROR("unknown client OBD type \"%s\", can't setup\n",
name);
return -EINVAL;
}
if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
CERROR("requires a TARGET UUID\n");
return -EINVAL;
}
if (LUSTRE_CFG_BUFLEN(lcfg, 1) > 37) {
CERROR("client UUID must be less than 38 characters\n");
return -EINVAL;
}
if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) {
CERROR("setup requires a SERVER UUID\n");
return -EINVAL;
}
if (LUSTRE_CFG_BUFLEN(lcfg, 2) > 37) {
CERROR("target UUID must be less than 38 characters\n");
return -EINVAL;
}
init_rwsem(&cli->cl_sem);
cli->cl_conn_count = 0;
memcpy(server_uuid.uuid, lustre_cfg_buf(lcfg, 2),
min_t(unsigned int, LUSTRE_CFG_BUFLEN(lcfg, 2),
sizeof(server_uuid)));
cli->cl_dirty = 0;
cli->cl_avail_grant = 0;
/* FIXME: Should limit this for the sum of all cl_dirty_max. */
cli->cl_dirty_max = OSC_MAX_DIRTY_DEFAULT * 1024 * 1024;
if (cli->cl_dirty_max >> PAGE_CACHE_SHIFT > totalram_pages / 8)
cli->cl_dirty_max = totalram_pages << (PAGE_CACHE_SHIFT - 3);
INIT_LIST_HEAD(&cli->cl_cache_waiters);
INIT_LIST_HEAD(&cli->cl_loi_ready_list);
INIT_LIST_HEAD(&cli->cl_loi_hp_ready_list);
INIT_LIST_HEAD(&cli->cl_loi_write_list);
INIT_LIST_HEAD(&cli->cl_loi_read_list);
client_obd_list_lock_init(&cli->cl_loi_list_lock);
atomic_set(&cli->cl_pending_w_pages, 0);
atomic_set(&cli->cl_pending_r_pages, 0);
cli->cl_r_in_flight = 0;
cli->cl_w_in_flight = 0;
spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
spin_lock_init(&cli->cl_read_page_hist.oh_lock);
spin_lock_init(&cli->cl_write_page_hist.oh_lock);
spin_lock_init(&cli->cl_read_offset_hist.oh_lock);
spin_lock_init(&cli->cl_write_offset_hist.oh_lock);
/* lru for osc. */
INIT_LIST_HEAD(&cli->cl_lru_osc);
atomic_set(&cli->cl_lru_shrinkers, 0);
atomic_set(&cli->cl_lru_busy, 0);
atomic_set(&cli->cl_lru_in_list, 0);
INIT_LIST_HEAD(&cli->cl_lru_list);
client_obd_list_lock_init(&cli->cl_lru_list_lock);
init_waitqueue_head(&cli->cl_destroy_waitq);
atomic_set(&cli->cl_destroy_in_flight, 0);
/* Turn on checksumming by default. */
cli->cl_checksum = 1;
/*
* The supported checksum types will be worked out at connect time
* Set cl_chksum* to CRC32 for now to avoid returning screwed info
* through procfs.
*/
cli->cl_cksum_type = cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS);
/* This value may be reduced at connect time in
* ptlrpc_connect_interpret() . We initialize it to only
* 1MB until we know what the performance looks like.
* In the future this should likely be increased. LU-1431 */
cli->cl_max_pages_per_rpc = min_t(int, PTLRPC_MAX_BRW_PAGES,
LNET_MTU >> PAGE_CACHE_SHIFT);
if (!strcmp(name, LUSTRE_MDC_NAME)) {
cli->cl_max_rpcs_in_flight = MDC_MAX_RIF_DEFAULT;
} else if (totalram_pages >> (20 - PAGE_CACHE_SHIFT) <= 128 /* MB */) {
cli->cl_max_rpcs_in_flight = 2;
} else if (totalram_pages >> (20 - PAGE_CACHE_SHIFT) <= 256 /* MB */) {
cli->cl_max_rpcs_in_flight = 3;
} else if (totalram_pages >> (20 - PAGE_CACHE_SHIFT) <= 512 /* MB */) {
cli->cl_max_rpcs_in_flight = 4;
} else {
if (osc_on_mdt(obddev->obd_name))
cli->cl_max_rpcs_in_flight = MDS_OSC_MAX_RIF_DEFAULT;
else
cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
}
rc = ldlm_get_ref();
if (rc) {
CERROR("ldlm_get_ref failed: %d\n", rc);
goto err;
}
ptlrpc_init_client(rq_portal, rp_portal, name,
&obddev->obd_ldlm_client);
imp = class_new_import(obddev);
if (imp == NULL) {
rc = -ENOENT;
goto err_ldlm;
}
imp->imp_client = &obddev->obd_ldlm_client;
imp->imp_connect_op = connect_op;
memcpy(cli->cl_target_uuid.uuid, lustre_cfg_buf(lcfg, 1),
LUSTRE_CFG_BUFLEN(lcfg, 1));
class_import_put(imp);
rc = client_import_add_conn(imp, &server_uuid, 1);
if (rc) {
CERROR("can't add initial connection\n");
goto err_import;
}
cli->cl_import = imp;
/* cli->cl_max_mds_{easize,cookiesize} updated by mdc_init_ea_size() */
cli->cl_max_mds_easize = sizeof(struct lov_mds_md_v3);
cli->cl_max_mds_cookiesize = sizeof(struct llog_cookie);
if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) {
CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
name, obddev->obd_name,
cli->cl_target_uuid.uuid);
spin_lock(&imp->imp_lock);
imp->imp_deactive = 1;
spin_unlock(&imp->imp_lock);
}
}
obddev->obd_namespace = ldlm_namespace_new(obddev, obddev->obd_name,
LDLM_NAMESPACE_CLIENT,
LDLM_NAMESPACE_GREEDY,
ns_type);
if (obddev->obd_namespace == NULL) {
CERROR("Unable to create client namespace - %s\n",
obddev->obd_name);
rc = -ENOMEM;
goto err_import;
}
cli->cl_qchk_stat = CL_NOT_QUOTACHECKED;
return rc;
err_import:
class_destroy_import(imp);
err_ldlm:
ldlm_put_ref();
err:
return rc;
}
EXPORT_SYMBOL(client_obd_setup);
int client_obd_cleanup(struct obd_device *obddev)
{
ldlm_namespace_free_post(obddev->obd_namespace);
obddev->obd_namespace = NULL;
LASSERT(obddev->u.cli.cl_import == NULL);
ldlm_put_ref();
return 0;
}
EXPORT_SYMBOL(client_obd_cleanup);
/* ->o_connect() method for client side (OSC and MDC and MGC) */
int client_connect_import(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 client_obd *cli = &obd->u.cli;
struct obd_import *imp = cli->cl_import;
struct obd_connect_data *ocd;
struct lustre_handle conn = { 0 };
int rc;
*exp = NULL;
down_write(&cli->cl_sem);
if (cli->cl_conn_count > 0) {
rc = -EALREADY;
goto out_sem;
}
rc = class_connect(&conn, obd, cluuid);
if (rc)
goto out_sem;
cli->cl_conn_count++;
*exp = class_conn2export(&conn);
LASSERT(obd->obd_namespace);
imp->imp_dlm_handle = conn;
rc = ptlrpc_init_import(imp);
if (rc != 0)
goto out_ldlm;
ocd = &imp->imp_connect_data;
if (data) {
*ocd = *data;
imp->imp_connect_flags_orig = data->ocd_connect_flags;
}
rc = ptlrpc_connect_import(imp);
if (rc != 0) {
LASSERT(imp->imp_state == LUSTRE_IMP_DISCON);
goto out_ldlm;
}
LASSERT(*exp != NULL && (*exp)->exp_connection);
if (data) {
LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
ocd->ocd_connect_flags, "old %#llx, new %#llx\n",
data->ocd_connect_flags, ocd->ocd_connect_flags);
data->ocd_connect_flags = ocd->ocd_connect_flags;
}
ptlrpc_pinger_add_import(imp);
if (rc) {
out_ldlm:
cli->cl_conn_count--;
class_disconnect(*exp);
*exp = NULL;
}
out_sem:
up_write(&cli->cl_sem);
return rc;
}
EXPORT_SYMBOL(client_connect_import);
int client_disconnect_export(struct obd_export *exp)
{
struct obd_device *obd = class_exp2obd(exp);
struct client_obd *cli;
struct obd_import *imp;
int rc = 0, err;
if (!obd) {
CERROR("invalid export for disconnect: exp %p cookie %#llx\n",
exp, exp ? exp->exp_handle.h_cookie : -1);
return -EINVAL;
}
cli = &obd->u.cli;
imp = cli->cl_import;
down_write(&cli->cl_sem);
CDEBUG(D_INFO, "disconnect %s - %d\n", obd->obd_name,
cli->cl_conn_count);
if (!cli->cl_conn_count) {
CERROR("disconnecting disconnected device (%s)\n",
obd->obd_name);
rc = -EINVAL;
goto out_disconnect;
}
cli->cl_conn_count--;
if (cli->cl_conn_count) {
rc = 0;
goto out_disconnect;
}
/* Mark import deactivated now, so we don't try to reconnect if any
* of the cleanup RPCs fails (e.g. LDLM cancel, etc). We don't
* fully deactivate the import, or that would drop all requests. */
spin_lock(&imp->imp_lock);
imp->imp_deactive = 1;
spin_unlock(&imp->imp_lock);
/* Some non-replayable imports (MDS's OSCs) are pinged, so just
* delete it regardless. (It's safe to delete an import that was
* never added.) */
(void)ptlrpc_pinger_del_import(imp);
if (obd->obd_namespace != NULL) {
/* obd_force == local only */
ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
obd->obd_force ? LCF_LOCAL : 0, NULL);
ldlm_namespace_free_prior(obd->obd_namespace, imp,
obd->obd_force);
}
/* There's no need to hold sem while disconnecting an import,
* and it may actually cause deadlock in GSS. */
up_write(&cli->cl_sem);
rc = ptlrpc_disconnect_import(imp, 0);
down_write(&cli->cl_sem);
ptlrpc_invalidate_import(imp);
out_disconnect:
/* Use server style - class_disconnect should be always called for
* o_disconnect. */
err = class_disconnect(exp);
if (!rc && err)
rc = err;
up_write(&cli->cl_sem);
return rc;
}
EXPORT_SYMBOL(client_disconnect_export);
/**
* Packs current SLV and Limit into \a req.
*/
int target_pack_pool_reply(struct ptlrpc_request *req)
{
struct obd_device *obd;
/* Check that we still have all structures alive as this may
* be some late RPC at shutdown time. */
if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
!exp_connect_lru_resize(req->rq_export))) {
lustre_msg_set_slv(req->rq_repmsg, 0);
lustre_msg_set_limit(req->rq_repmsg, 0);
return 0;
}
/* OBD is alive here as export is alive, which we checked above. */
obd = req->rq_export->exp_obd;
read_lock(&obd->obd_pool_lock);
lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
read_unlock(&obd->obd_pool_lock);
return 0;
}
EXPORT_SYMBOL(target_pack_pool_reply);
static int
target_send_reply_msg(struct ptlrpc_request *req, int rc, int fail_id)
{
if (OBD_FAIL_CHECK_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) {
DEBUG_REQ(D_ERROR, req, "dropping reply");
return -ECOMM;
}
if (unlikely(rc)) {
DEBUG_REQ(D_NET, req, "processing error (%d)", rc);
req->rq_status = rc;
return ptlrpc_send_error(req, 1);
}
DEBUG_REQ(D_NET, req, "sending reply");
return ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT);
}
void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
{
struct ptlrpc_service_part *svcpt;
int netrc;
struct ptlrpc_reply_state *rs;
struct obd_export *exp;
if (req->rq_no_reply)
return;
svcpt = req->rq_rqbd->rqbd_svcpt;
rs = req->rq_reply_state;
if (rs == NULL || !rs->rs_difficult) {
/* no notifiers */
target_send_reply_msg(req, rc, fail_id);
return;
}
/* must be an export if locks saved */
LASSERT(req->rq_export != NULL);
/* req/reply consistent */
LASSERT(rs->rs_svcpt == svcpt);
/* "fresh" reply */
LASSERT(!rs->rs_scheduled);
LASSERT(!rs->rs_scheduled_ever);
LASSERT(!rs->rs_handled);
LASSERT(!rs->rs_on_net);
LASSERT(rs->rs_export == NULL);
LASSERT(list_empty(&rs->rs_obd_list));
LASSERT(list_empty(&rs->rs_exp_list));
exp = class_export_get(req->rq_export);
/* disable reply scheduling while I'm setting up */
rs->rs_scheduled = 1;
rs->rs_on_net = 1;
rs->rs_xid = req->rq_xid;
rs->rs_transno = req->rq_transno;
rs->rs_export = exp;
rs->rs_opc = lustre_msg_get_opc(req->rq_reqmsg);
spin_lock(&exp->exp_uncommitted_replies_lock);
CDEBUG(D_NET, "rs transno = %llu, last committed = %llu\n",
rs->rs_transno, exp->exp_last_committed);
if (rs->rs_transno > exp->exp_last_committed) {
/* not committed already */
list_add_tail(&rs->rs_obd_list,
&exp->exp_uncommitted_replies);
}
spin_unlock(&exp->exp_uncommitted_replies_lock);
spin_lock(&exp->exp_lock);
list_add_tail(&rs->rs_exp_list, &exp->exp_outstanding_replies);
spin_unlock(&exp->exp_lock);
netrc = target_send_reply_msg(req, rc, fail_id);
spin_lock(&svcpt->scp_rep_lock);
atomic_inc(&svcpt->scp_nreps_difficult);
if (netrc != 0) {
/* error sending: reply is off the net. Also we need +1
* reply ref until ptlrpc_handle_rs() is done
* with the reply state (if the send was successful, there
* would have been +1 ref for the net, which
* reply_out_callback leaves alone) */
rs->rs_on_net = 0;
ptlrpc_rs_addref(rs);
}
spin_lock(&rs->rs_lock);
if (rs->rs_transno <= exp->exp_last_committed ||
(!rs->rs_on_net && !rs->rs_no_ack) ||
list_empty(&rs->rs_exp_list) || /* completed already */
list_empty(&rs->rs_obd_list)) {
CDEBUG(D_HA, "Schedule reply immediately\n");
ptlrpc_dispatch_difficult_reply(rs);
} else {
list_add(&rs->rs_list, &svcpt->scp_rep_active);
rs->rs_scheduled = 0; /* allow notifier to schedule */
}
spin_unlock(&rs->rs_lock);
spin_unlock(&svcpt->scp_rep_lock);
}
EXPORT_SYMBOL(target_send_reply);
ldlm_mode_t lck_compat_array[] = {
[LCK_EX] = LCK_COMPAT_EX,
[LCK_PW] = LCK_COMPAT_PW,
[LCK_PR] = LCK_COMPAT_PR,
[LCK_CW] = LCK_COMPAT_CW,
[LCK_CR] = LCK_COMPAT_CR,
[LCK_NL] = LCK_COMPAT_NL,
[LCK_GROUP] = LCK_COMPAT_GROUP,
[LCK_COS] = LCK_COMPAT_COS,
};
/**
* Rather arbitrary mapping from LDLM error codes to errno values. This should
* not escape to the user level.
*/
int ldlm_error2errno(ldlm_error_t error)
{
int result;
switch (error) {
case ELDLM_OK:
result = 0;
break;
case ELDLM_LOCK_CHANGED:
result = -ESTALE;
break;
case ELDLM_LOCK_ABORTED:
result = -ENAVAIL;
break;
case ELDLM_LOCK_REPLACED:
result = -ESRCH;
break;
case ELDLM_NO_LOCK_DATA:
result = -ENOENT;
break;
case ELDLM_NAMESPACE_EXISTS:
result = -EEXIST;
break;
case ELDLM_BAD_NAMESPACE:
result = -EBADF;
break;
default:
if (((int)error) < 0) /* cast to signed type */
result = error; /* as ldlm_error_t can be unsigned */
else {
CERROR("Invalid DLM result code: %d\n", error);
result = -EPROTO;
}
}
return result;
}
EXPORT_SYMBOL(ldlm_error2errno);
#if LUSTRE_TRACKS_LOCK_EXP_REFS
void ldlm_dump_export_locks(struct obd_export *exp)
{
spin_lock(&exp->exp_locks_list_guard);
if (!list_empty(&exp->exp_locks_list)) {
struct ldlm_lock *lock;
CERROR("dumping locks for export %p,ignore if the unmount doesn't hang\n",
exp);
list_for_each_entry(lock, &exp->exp_locks_list,
l_exp_refs_link)
LDLM_ERROR(lock, "lock:");
}
spin_unlock(&exp->exp_locks_list_guard);
}
#endif
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