4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2010, 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 * This file deals with various client/target related logic including recovery.
40 * TODO: This code more logically belongs in the ptlrpc module than in ldlm and
44 #define DEBUG_SUBSYSTEM S_LDLM
46 # include <linux/libcfs/libcfs.h>
48 #include <obd_class.h>
49 #include <lustre_dlm.h>
50 #include <lustre_net.h>
51 #include <lustre_sec.h>
52 #include "ldlm_internal.h"
54 /* @priority: If non-zero, move the selected connection to the list head.
55 * @create: If zero, only search in existing connections.
57 static int import_set_conn(struct obd_import *imp, struct obd_uuid *uuid,
58 int priority, int create)
60 struct ptlrpc_connection *ptlrpc_conn;
61 struct obd_import_conn *imp_conn = NULL, *item;
64 if (!create && !priority) {
65 CDEBUG(D_HA, "Nothing to do\n");
69 ptlrpc_conn = ptlrpc_uuid_to_connection(uuid);
71 CDEBUG(D_HA, "can't find connection %s\n", uuid->uuid);
76 OBD_ALLOC(imp_conn, sizeof(*imp_conn));
78 GOTO(out_put, rc = -ENOMEM);
82 spin_lock(&imp->imp_lock);
83 list_for_each_entry(item, &imp->imp_conn_list, oic_item) {
84 if (obd_uuid_equals(uuid, &item->oic_uuid)) {
86 list_del(&item->oic_item);
87 list_add(&item->oic_item,
89 item->oic_last_attempt = 0;
91 CDEBUG(D_HA, "imp %p@%s: found existing conn %s%s\n",
92 imp, imp->imp_obd->obd_name, uuid->uuid,
93 (priority ? ", moved to head" : ""));
94 spin_unlock(&imp->imp_lock);
95 GOTO(out_free, rc = 0);
98 /* No existing import connection found for \a uuid. */
100 imp_conn->oic_conn = ptlrpc_conn;
101 imp_conn->oic_uuid = *uuid;
102 imp_conn->oic_last_attempt = 0;
104 list_add(&imp_conn->oic_item, &imp->imp_conn_list);
106 list_add_tail(&imp_conn->oic_item,
107 &imp->imp_conn_list);
108 CDEBUG(D_HA, "imp %p@%s: add connection %s at %s\n",
109 imp, imp->imp_obd->obd_name, uuid->uuid,
110 (priority ? "head" : "tail"));
112 spin_unlock(&imp->imp_lock);
113 GOTO(out_free, rc = -ENOENT);
116 spin_unlock(&imp->imp_lock);
120 OBD_FREE(imp_conn, sizeof(*imp_conn));
122 ptlrpc_connection_put(ptlrpc_conn);
126 int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid)
128 return import_set_conn(imp, uuid, 1, 0);
131 int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
134 return import_set_conn(imp, uuid, priority, 1);
136 EXPORT_SYMBOL(client_import_add_conn);
138 int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
140 struct obd_import_conn *imp_conn;
141 struct obd_export *dlmexp;
144 spin_lock(&imp->imp_lock);
145 if (list_empty(&imp->imp_conn_list)) {
146 LASSERT(!imp->imp_connection);
150 list_for_each_entry(imp_conn, &imp->imp_conn_list, oic_item) {
151 if (!obd_uuid_equals(uuid, &imp_conn->oic_uuid))
153 LASSERT(imp_conn->oic_conn);
155 if (imp_conn == imp->imp_conn_current) {
156 LASSERT(imp_conn->oic_conn == imp->imp_connection);
158 if (imp->imp_state != LUSTRE_IMP_CLOSED &&
159 imp->imp_state != LUSTRE_IMP_DISCON) {
160 CERROR("can't remove current connection\n");
161 GOTO(out, rc = -EBUSY);
164 ptlrpc_connection_put(imp->imp_connection);
165 imp->imp_connection = NULL;
167 dlmexp = class_conn2export(&imp->imp_dlm_handle);
168 if (dlmexp && dlmexp->exp_connection) {
169 LASSERT(dlmexp->exp_connection ==
171 ptlrpc_connection_put(dlmexp->exp_connection);
172 dlmexp->exp_connection = NULL;
176 list_del(&imp_conn->oic_item);
177 ptlrpc_connection_put(imp_conn->oic_conn);
178 OBD_FREE(imp_conn, sizeof(*imp_conn));
179 CDEBUG(D_HA, "imp %p@%s: remove connection %s\n",
180 imp, imp->imp_obd->obd_name, uuid->uuid);
185 spin_unlock(&imp->imp_lock);
187 CERROR("connection %s not found\n", uuid->uuid);
190 EXPORT_SYMBOL(client_import_del_conn);
193 * Find conn UUID by peer NID. \a peer is a server NID. This function is used
194 * to find a conn uuid of \a imp which can reach \a peer.
196 int client_import_find_conn(struct obd_import *imp, lnet_nid_t peer,
197 struct obd_uuid *uuid)
199 struct obd_import_conn *conn;
202 spin_lock(&imp->imp_lock);
203 list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
204 /* Check if conn UUID does have this peer NID. */
205 if (class_check_uuid(&conn->oic_uuid, peer)) {
206 *uuid = conn->oic_uuid;
211 spin_unlock(&imp->imp_lock);
214 EXPORT_SYMBOL(client_import_find_conn);
216 void client_destroy_import(struct obd_import *imp)
218 /* Drop security policy instance after all RPCs have finished/aborted
219 * to let all busy contexts be released. */
220 class_import_get(imp);
221 class_destroy_import(imp);
222 sptlrpc_import_sec_put(imp);
223 class_import_put(imp);
225 EXPORT_SYMBOL(client_destroy_import);
228 * Check whether or not the OSC is on MDT.
231 * setup 0:{fsname}-OSTxxxx-osc[-MDTxxxx] 1:lustre-OST0000_UUID 2:NID
233 * setup 0:{fsname}-OSTxxxx-osc 1:lustre-OST0000_UUID 2:NID
236 static int osc_on_mdt(char *obdname)
240 ptr = strrchr(obdname, '-');
244 if (strncmp(ptr + 1, "MDT", 3) == 0)
250 /* Configure an RPC client OBD device.
255 * 3 - inactive-on-startup
257 int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
259 struct client_obd *cli = &obddev->u.cli;
260 struct obd_import *imp;
261 struct obd_uuid server_uuid;
262 int rq_portal, rp_portal, connect_op;
263 char *name = obddev->obd_type->typ_name;
264 ldlm_ns_type_t ns_type = LDLM_NS_TYPE_UNKNOWN;
266 char *cli_name = lustre_cfg_buf(lcfg, 0);
268 /* In a more perfect world, we would hang a ptlrpc_client off of
269 * obd_type and just use the values from there. */
270 if (!strcmp(name, LUSTRE_OSC_NAME) ||
271 (!(strcmp(name, LUSTRE_OSP_NAME)) &&
272 (is_osp_on_mdt(cli_name) &&
273 strstr(lustre_cfg_buf(lcfg, 1), "OST") != NULL))) {
274 /* OSC or OSP_on_MDT for OSTs */
275 rq_portal = OST_REQUEST_PORTAL;
276 rp_portal = OSC_REPLY_PORTAL;
277 connect_op = OST_CONNECT;
278 cli->cl_sp_me = LUSTRE_SP_CLI;
279 cli->cl_sp_to = LUSTRE_SP_OST;
280 ns_type = LDLM_NS_TYPE_OSC;
281 } else if (!strcmp(name, LUSTRE_MDC_NAME) ||
282 !strcmp(name, LUSTRE_LWP_NAME) ||
283 (!strcmp(name, LUSTRE_OSP_NAME) &&
284 (is_osp_on_mdt(cli_name) &&
285 strstr(lustre_cfg_buf(lcfg, 1), "OST") == NULL))) {
286 /* MDC or OSP_on_MDT for other MDTs */
287 rq_portal = MDS_REQUEST_PORTAL;
288 rp_portal = MDC_REPLY_PORTAL;
289 connect_op = MDS_CONNECT;
290 cli->cl_sp_me = LUSTRE_SP_CLI;
291 cli->cl_sp_to = LUSTRE_SP_MDT;
292 ns_type = LDLM_NS_TYPE_MDC;
293 } else if (!strcmp(name, LUSTRE_MGC_NAME)) {
294 rq_portal = MGS_REQUEST_PORTAL;
295 rp_portal = MGC_REPLY_PORTAL;
296 connect_op = MGS_CONNECT;
297 cli->cl_sp_me = LUSTRE_SP_MGC;
298 cli->cl_sp_to = LUSTRE_SP_MGS;
299 cli->cl_flvr_mgc.sf_rpc = SPTLRPC_FLVR_INVALID;
300 ns_type = LDLM_NS_TYPE_MGC;
302 CERROR("unknown client OBD type \"%s\", can't setup\n",
307 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
308 CERROR("requires a TARGET UUID\n");
312 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > 37) {
313 CERROR("client UUID must be less than 38 characters\n");
317 if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) {
318 CERROR("setup requires a SERVER UUID\n");
322 if (LUSTRE_CFG_BUFLEN(lcfg, 2) > 37) {
323 CERROR("target UUID must be less than 38 characters\n");
327 init_rwsem(&cli->cl_sem);
328 mutex_init(&cli->cl_mgc_mutex);
329 cli->cl_conn_count = 0;
330 memcpy(server_uuid.uuid, lustre_cfg_buf(lcfg, 2),
331 min_t(unsigned int, LUSTRE_CFG_BUFLEN(lcfg, 2),
332 sizeof(server_uuid)));
335 cli->cl_avail_grant = 0;
336 /* FIXME: Should limit this for the sum of all cl_dirty_max. */
337 cli->cl_dirty_max = OSC_MAX_DIRTY_DEFAULT * 1024 * 1024;
338 if (cli->cl_dirty_max >> PAGE_CACHE_SHIFT > totalram_pages / 8)
339 cli->cl_dirty_max = totalram_pages << (PAGE_CACHE_SHIFT - 3);
340 INIT_LIST_HEAD(&cli->cl_cache_waiters);
341 INIT_LIST_HEAD(&cli->cl_loi_ready_list);
342 INIT_LIST_HEAD(&cli->cl_loi_hp_ready_list);
343 INIT_LIST_HEAD(&cli->cl_loi_write_list);
344 INIT_LIST_HEAD(&cli->cl_loi_read_list);
345 client_obd_list_lock_init(&cli->cl_loi_list_lock);
346 atomic_set(&cli->cl_pending_w_pages, 0);
347 atomic_set(&cli->cl_pending_r_pages, 0);
348 cli->cl_r_in_flight = 0;
349 cli->cl_w_in_flight = 0;
351 spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
352 spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
353 spin_lock_init(&cli->cl_read_page_hist.oh_lock);
354 spin_lock_init(&cli->cl_write_page_hist.oh_lock);
355 spin_lock_init(&cli->cl_read_offset_hist.oh_lock);
356 spin_lock_init(&cli->cl_write_offset_hist.oh_lock);
359 INIT_LIST_HEAD(&cli->cl_lru_osc);
360 atomic_set(&cli->cl_lru_shrinkers, 0);
361 atomic_set(&cli->cl_lru_busy, 0);
362 atomic_set(&cli->cl_lru_in_list, 0);
363 INIT_LIST_HEAD(&cli->cl_lru_list);
364 client_obd_list_lock_init(&cli->cl_lru_list_lock);
366 init_waitqueue_head(&cli->cl_destroy_waitq);
367 atomic_set(&cli->cl_destroy_in_flight, 0);
368 /* Turn on checksumming by default. */
369 cli->cl_checksum = 1;
371 * The supported checksum types will be worked out at connect time
372 * Set cl_chksum* to CRC32 for now to avoid returning screwed info
375 cli->cl_cksum_type = cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
376 atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS);
378 /* This value may be reduced at connect time in
379 * ptlrpc_connect_interpret() . We initialize it to only
380 * 1MB until we know what the performance looks like.
381 * In the future this should likely be increased. LU-1431 */
382 cli->cl_max_pages_per_rpc = min_t(int, PTLRPC_MAX_BRW_PAGES,
383 LNET_MTU >> PAGE_CACHE_SHIFT);
385 if (!strcmp(name, LUSTRE_MDC_NAME)) {
386 cli->cl_max_rpcs_in_flight = MDC_MAX_RIF_DEFAULT;
387 } else if (totalram_pages >> (20 - PAGE_CACHE_SHIFT) <= 128 /* MB */) {
388 cli->cl_max_rpcs_in_flight = 2;
389 } else if (totalram_pages >> (20 - PAGE_CACHE_SHIFT) <= 256 /* MB */) {
390 cli->cl_max_rpcs_in_flight = 3;
391 } else if (totalram_pages >> (20 - PAGE_CACHE_SHIFT) <= 512 /* MB */) {
392 cli->cl_max_rpcs_in_flight = 4;
394 if (osc_on_mdt(obddev->obd_name))
395 cli->cl_max_rpcs_in_flight = MDS_OSC_MAX_RIF_DEFAULT;
397 cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
401 CERROR("ldlm_get_ref failed: %d\n", rc);
405 ptlrpc_init_client(rq_portal, rp_portal, name,
406 &obddev->obd_ldlm_client);
408 imp = class_new_import(obddev);
410 GOTO(err_ldlm, rc = -ENOENT);
411 imp->imp_client = &obddev->obd_ldlm_client;
412 imp->imp_connect_op = connect_op;
413 memcpy(cli->cl_target_uuid.uuid, lustre_cfg_buf(lcfg, 1),
414 LUSTRE_CFG_BUFLEN(lcfg, 1));
415 class_import_put(imp);
417 rc = client_import_add_conn(imp, &server_uuid, 1);
419 CERROR("can't add initial connection\n");
420 GOTO(err_import, rc);
423 cli->cl_import = imp;
424 /* cli->cl_max_mds_{easize,cookiesize} updated by mdc_init_ea_size() */
425 cli->cl_max_mds_easize = sizeof(struct lov_mds_md_v3);
426 cli->cl_max_mds_cookiesize = sizeof(struct llog_cookie);
428 if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
429 if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) {
430 CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
431 name, obddev->obd_name,
432 cli->cl_target_uuid.uuid);
433 spin_lock(&imp->imp_lock);
434 imp->imp_deactive = 1;
435 spin_unlock(&imp->imp_lock);
439 obddev->obd_namespace = ldlm_namespace_new(obddev, obddev->obd_name,
440 LDLM_NAMESPACE_CLIENT,
441 LDLM_NAMESPACE_GREEDY,
443 if (obddev->obd_namespace == NULL) {
444 CERROR("Unable to create client namespace - %s\n",
446 GOTO(err_import, rc = -ENOMEM);
449 cli->cl_qchk_stat = CL_NOT_QUOTACHECKED;
454 class_destroy_import(imp);
461 EXPORT_SYMBOL(client_obd_setup);
463 int client_obd_cleanup(struct obd_device *obddev)
465 ldlm_namespace_free_post(obddev->obd_namespace);
466 obddev->obd_namespace = NULL;
468 LASSERT(obddev->u.cli.cl_import == NULL);
473 EXPORT_SYMBOL(client_obd_cleanup);
475 /* ->o_connect() method for client side (OSC and MDC and MGC) */
476 int client_connect_import(const struct lu_env *env,
477 struct obd_export **exp,
478 struct obd_device *obd, struct obd_uuid *cluuid,
479 struct obd_connect_data *data, void *localdata)
481 struct client_obd *cli = &obd->u.cli;
482 struct obd_import *imp = cli->cl_import;
483 struct obd_connect_data *ocd;
484 struct lustre_handle conn = { 0 };
488 down_write(&cli->cl_sem);
489 if (cli->cl_conn_count > 0 )
490 GOTO(out_sem, rc = -EALREADY);
492 rc = class_connect(&conn, obd, cluuid);
496 cli->cl_conn_count++;
497 *exp = class_conn2export(&conn);
499 LASSERT(obd->obd_namespace);
501 imp->imp_dlm_handle = conn;
502 rc = ptlrpc_init_import(imp);
506 ocd = &imp->imp_connect_data;
509 imp->imp_connect_flags_orig = data->ocd_connect_flags;
512 rc = ptlrpc_connect_import(imp);
514 LASSERT (imp->imp_state == LUSTRE_IMP_DISCON);
517 LASSERT(*exp != NULL && (*exp)->exp_connection);
520 LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
521 ocd->ocd_connect_flags, "old "LPX64", new "LPX64"\n",
522 data->ocd_connect_flags, ocd->ocd_connect_flags);
523 data->ocd_connect_flags = ocd->ocd_connect_flags;
526 ptlrpc_pinger_add_import(imp);
530 cli->cl_conn_count--;
531 class_disconnect(*exp);
535 up_write(&cli->cl_sem);
539 EXPORT_SYMBOL(client_connect_import);
541 int client_disconnect_export(struct obd_export *exp)
543 struct obd_device *obd = class_exp2obd(exp);
544 struct client_obd *cli;
545 struct obd_import *imp;
549 CERROR("invalid export for disconnect: exp %p cookie "LPX64"\n",
550 exp, exp ? exp->exp_handle.h_cookie : -1);
555 imp = cli->cl_import;
557 down_write(&cli->cl_sem);
558 CDEBUG(D_INFO, "disconnect %s - %d\n", obd->obd_name,
561 if (!cli->cl_conn_count) {
562 CERROR("disconnecting disconnected device (%s)\n",
564 GOTO(out_disconnect, rc = -EINVAL);
567 cli->cl_conn_count--;
568 if (cli->cl_conn_count)
569 GOTO(out_disconnect, rc = 0);
571 /* Mark import deactivated now, so we don't try to reconnect if any
572 * of the cleanup RPCs fails (e.g. LDLM cancel, etc). We don't
573 * fully deactivate the import, or that would drop all requests. */
574 spin_lock(&imp->imp_lock);
575 imp->imp_deactive = 1;
576 spin_unlock(&imp->imp_lock);
578 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
579 * delete it regardless. (It's safe to delete an import that was
581 (void)ptlrpc_pinger_del_import(imp);
583 if (obd->obd_namespace != NULL) {
584 /* obd_force == local only */
585 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
586 obd->obd_force ? LCF_LOCAL : 0, NULL);
587 ldlm_namespace_free_prior(obd->obd_namespace, imp, obd->obd_force);
590 /* There's no need to hold sem while disconnecting an import,
591 * and it may actually cause deadlock in GSS. */
592 up_write(&cli->cl_sem);
593 rc = ptlrpc_disconnect_import(imp, 0);
594 down_write(&cli->cl_sem);
596 ptlrpc_invalidate_import(imp);
599 /* Use server style - class_disconnect should be always called for
601 err = class_disconnect(exp);
605 up_write(&cli->cl_sem);
609 EXPORT_SYMBOL(client_disconnect_export);
613 * Packs current SLV and Limit into \a req.
615 int target_pack_pool_reply(struct ptlrpc_request *req)
617 struct obd_device *obd;
619 /* Check that we still have all structures alive as this may
620 * be some late RPC at shutdown time. */
621 if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
622 !exp_connect_lru_resize(req->rq_export))) {
623 lustre_msg_set_slv(req->rq_repmsg, 0);
624 lustre_msg_set_limit(req->rq_repmsg, 0);
628 /* OBD is alive here as export is alive, which we checked above. */
629 obd = req->rq_export->exp_obd;
631 read_lock(&obd->obd_pool_lock);
632 lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
633 lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
634 read_unlock(&obd->obd_pool_lock);
638 EXPORT_SYMBOL(target_pack_pool_reply);
640 int target_send_reply_msg(struct ptlrpc_request *req, int rc, int fail_id)
642 if (OBD_FAIL_CHECK_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) {
643 DEBUG_REQ(D_ERROR, req, "dropping reply");
648 DEBUG_REQ(D_NET, req, "processing error (%d)", rc);
650 return (ptlrpc_send_error(req, 1));
652 DEBUG_REQ(D_NET, req, "sending reply");
655 return (ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT));
658 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
660 struct ptlrpc_service_part *svcpt;
662 struct ptlrpc_reply_state *rs;
663 struct obd_export *exp;
665 if (req->rq_no_reply) {
669 svcpt = req->rq_rqbd->rqbd_svcpt;
670 rs = req->rq_reply_state;
671 if (rs == NULL || !rs->rs_difficult) {
673 target_send_reply_msg (req, rc, fail_id);
677 /* must be an export if locks saved */
678 LASSERT (req->rq_export != NULL);
679 /* req/reply consistent */
680 LASSERT(rs->rs_svcpt == svcpt);
683 LASSERT (!rs->rs_scheduled);
684 LASSERT (!rs->rs_scheduled_ever);
685 LASSERT (!rs->rs_handled);
686 LASSERT (!rs->rs_on_net);
687 LASSERT (rs->rs_export == NULL);
688 LASSERT (list_empty(&rs->rs_obd_list));
689 LASSERT (list_empty(&rs->rs_exp_list));
691 exp = class_export_get (req->rq_export);
693 /* disable reply scheduling while I'm setting up */
694 rs->rs_scheduled = 1;
696 rs->rs_xid = req->rq_xid;
697 rs->rs_transno = req->rq_transno;
699 rs->rs_opc = lustre_msg_get_opc(req->rq_reqmsg);
701 spin_lock(&exp->exp_uncommitted_replies_lock);
702 CDEBUG(D_NET, "rs transno = "LPU64", last committed = "LPU64"\n",
703 rs->rs_transno, exp->exp_last_committed);
704 if (rs->rs_transno > exp->exp_last_committed) {
705 /* not committed already */
706 list_add_tail(&rs->rs_obd_list,
707 &exp->exp_uncommitted_replies);
709 spin_unlock(&exp->exp_uncommitted_replies_lock);
711 spin_lock(&exp->exp_lock);
712 list_add_tail(&rs->rs_exp_list, &exp->exp_outstanding_replies);
713 spin_unlock(&exp->exp_lock);
715 netrc = target_send_reply_msg(req, rc, fail_id);
717 spin_lock(&svcpt->scp_rep_lock);
719 atomic_inc(&svcpt->scp_nreps_difficult);
722 /* error sending: reply is off the net. Also we need +1
723 * reply ref until ptlrpc_handle_rs() is done
724 * with the reply state (if the send was successful, there
725 * would have been +1 ref for the net, which
726 * reply_out_callback leaves alone) */
728 ptlrpc_rs_addref(rs);
731 spin_lock(&rs->rs_lock);
732 if (rs->rs_transno <= exp->exp_last_committed ||
733 (!rs->rs_on_net && !rs->rs_no_ack) ||
734 list_empty(&rs->rs_exp_list) || /* completed already */
735 list_empty(&rs->rs_obd_list)) {
736 CDEBUG(D_HA, "Schedule reply immediately\n");
737 ptlrpc_dispatch_difficult_reply(rs);
739 list_add(&rs->rs_list, &svcpt->scp_rep_active);
740 rs->rs_scheduled = 0; /* allow notifier to schedule */
742 spin_unlock(&rs->rs_lock);
743 spin_unlock(&svcpt->scp_rep_lock);
745 EXPORT_SYMBOL(target_send_reply);
747 ldlm_mode_t lck_compat_array[] = {
748 [LCK_EX] = LCK_COMPAT_EX,
749 [LCK_PW] = LCK_COMPAT_PW,
750 [LCK_PR] = LCK_COMPAT_PR,
751 [LCK_CW] = LCK_COMPAT_CW,
752 [LCK_CR] = LCK_COMPAT_CR,
753 [LCK_NL] = LCK_COMPAT_NL,
754 [LCK_GROUP] = LCK_COMPAT_GROUP,
755 [LCK_COS] = LCK_COMPAT_COS,
759 * Rather arbitrary mapping from LDLM error codes to errno values. This should
760 * not escape to the user level.
762 int ldlm_error2errno(ldlm_error_t error)
770 case ELDLM_LOCK_CHANGED:
773 case ELDLM_LOCK_ABORTED:
776 case ELDLM_LOCK_REPLACED:
779 case ELDLM_NO_LOCK_DATA:
782 case ELDLM_NAMESPACE_EXISTS:
785 case ELDLM_BAD_NAMESPACE:
789 if (((int)error) < 0) /* cast to signed type */
790 result = error; /* as ldlm_error_t can be unsigned */
792 CERROR("Invalid DLM result code: %d\n", error);
798 EXPORT_SYMBOL(ldlm_error2errno);
801 * Dual to ldlm_error2errno(): maps errno values back to ldlm_error_t.
803 ldlm_error_t ldlm_errno2error(int err_no)
812 error = ELDLM_LOCK_CHANGED;
815 error = ELDLM_LOCK_ABORTED;
818 error = ELDLM_LOCK_REPLACED;
821 error = ELDLM_NO_LOCK_DATA;
824 error = ELDLM_NAMESPACE_EXISTS;
827 error = ELDLM_BAD_NAMESPACE;
834 EXPORT_SYMBOL(ldlm_errno2error);
836 #if LUSTRE_TRACKS_LOCK_EXP_REFS
837 void ldlm_dump_export_locks(struct obd_export *exp)
839 spin_lock(&exp->exp_locks_list_guard);
840 if (!list_empty(&exp->exp_locks_list)) {
841 struct ldlm_lock *lock;
843 CERROR("dumping locks for export %p,"
844 "ignore if the unmount doesn't hang\n", exp);
845 list_for_each_entry(lock, &exp->exp_locks_list,
847 LDLM_ERROR(lock, "lock:");
849 spin_unlock(&exp->exp_locks_list_guard);