1 /*
2 * GPL HEADER START
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
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.
9 *
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).
15 *
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
19 *
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
22 * have any questions.
23 *
24 * GPL HEADER END
25 */
26 /*
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 *
30 * Copyright (c) 2010, 2012, Intel Corporation.
31 */
32 /*
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
35 */
36
37 /**
38 * This file deals with various client/target related logic including recovery.
39 *
40 * TODO: This code more logically belongs in the ptlrpc module than in ldlm and
41 * should be moved.
42 */
43
44 #define DEBUG_SUBSYSTEM S_LDLM
45
46 #include "../../include/linux/libcfs/libcfs.h"
47 #include "../include/obd.h"
48 #include "../include/obd_class.h"
49 #include "../include/lustre_dlm.h"
50 #include "../include/lustre_net.h"
51 #include "../include/lustre_sec.h"
52 #include "ldlm_internal.h"
53
54 /* @priority: If non-zero, move the selected connection to the list head.
55 * @create: If zero, only search in existing connections.
56 */
import_set_conn(struct obd_import * imp,struct obd_uuid * uuid,int priority,int create)57 static int import_set_conn(struct obd_import *imp, struct obd_uuid *uuid,
58 int priority, int create)
59 {
60 struct ptlrpc_connection *ptlrpc_conn;
61 struct obd_import_conn *imp_conn = NULL, *item;
62 int rc = 0;
63
64 if (!create && !priority) {
65 CDEBUG(D_HA, "Nothing to do\n");
66 return -EINVAL;
67 }
68
69 ptlrpc_conn = ptlrpc_uuid_to_connection(uuid);
70 if (!ptlrpc_conn) {
71 CDEBUG(D_HA, "can't find connection %s\n", uuid->uuid);
72 return -ENOENT;
73 }
74
75 if (create) {
76 OBD_ALLOC(imp_conn, sizeof(*imp_conn));
77 if (!imp_conn) {
78 rc = -ENOMEM;
79 goto out_put;
80 }
81 }
82
83 spin_lock(&imp->imp_lock);
84 list_for_each_entry(item, &imp->imp_conn_list, oic_item) {
85 if (obd_uuid_equals(uuid, &item->oic_uuid)) {
86 if (priority) {
87 list_del(&item->oic_item);
88 list_add(&item->oic_item,
89 &imp->imp_conn_list);
90 item->oic_last_attempt = 0;
91 }
92 CDEBUG(D_HA, "imp %p@%s: found existing conn %s%s\n",
93 imp, imp->imp_obd->obd_name, uuid->uuid,
94 (priority ? ", moved to head" : ""));
95 spin_unlock(&imp->imp_lock);
96 rc = 0;
97 goto out_free;
98 }
99 }
100 /* No existing import connection found for \a uuid. */
101 if (create) {
102 imp_conn->oic_conn = ptlrpc_conn;
103 imp_conn->oic_uuid = *uuid;
104 imp_conn->oic_last_attempt = 0;
105 if (priority)
106 list_add(&imp_conn->oic_item, &imp->imp_conn_list);
107 else
108 list_add_tail(&imp_conn->oic_item,
109 &imp->imp_conn_list);
110 CDEBUG(D_HA, "imp %p@%s: add connection %s at %s\n",
111 imp, imp->imp_obd->obd_name, uuid->uuid,
112 (priority ? "head" : "tail"));
113 } else {
114 spin_unlock(&imp->imp_lock);
115 rc = -ENOENT;
116 goto out_free;
117 }
118
119 spin_unlock(&imp->imp_lock);
120 return 0;
121 out_free:
122 if (imp_conn)
123 OBD_FREE(imp_conn, sizeof(*imp_conn));
124 out_put:
125 ptlrpc_connection_put(ptlrpc_conn);
126 return rc;
127 }
128
import_set_conn_priority(struct obd_import * imp,struct obd_uuid * uuid)129 int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid)
130 {
131 return import_set_conn(imp, uuid, 1, 0);
132 }
133
client_import_add_conn(struct obd_import * imp,struct obd_uuid * uuid,int priority)134 int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
135 int priority)
136 {
137 return import_set_conn(imp, uuid, priority, 1);
138 }
139 EXPORT_SYMBOL(client_import_add_conn);
140
client_import_del_conn(struct obd_import * imp,struct obd_uuid * uuid)141 int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
142 {
143 struct obd_import_conn *imp_conn;
144 struct obd_export *dlmexp;
145 int rc = -ENOENT;
146
147 spin_lock(&imp->imp_lock);
148 if (list_empty(&imp->imp_conn_list)) {
149 LASSERT(!imp->imp_connection);
150 goto out;
151 }
152
153 list_for_each_entry(imp_conn, &imp->imp_conn_list, oic_item) {
154 if (!obd_uuid_equals(uuid, &imp_conn->oic_uuid))
155 continue;
156 LASSERT(imp_conn->oic_conn);
157
158 if (imp_conn == imp->imp_conn_current) {
159 LASSERT(imp_conn->oic_conn == imp->imp_connection);
160
161 if (imp->imp_state != LUSTRE_IMP_CLOSED &&
162 imp->imp_state != LUSTRE_IMP_DISCON) {
163 CERROR("can't remove current connection\n");
164 rc = -EBUSY;
165 goto out;
166 }
167
168 ptlrpc_connection_put(imp->imp_connection);
169 imp->imp_connection = NULL;
170
171 dlmexp = class_conn2export(&imp->imp_dlm_handle);
172 if (dlmexp && dlmexp->exp_connection) {
173 LASSERT(dlmexp->exp_connection ==
174 imp_conn->oic_conn);
175 ptlrpc_connection_put(dlmexp->exp_connection);
176 dlmexp->exp_connection = NULL;
177 }
178 }
179
180 list_del(&imp_conn->oic_item);
181 ptlrpc_connection_put(imp_conn->oic_conn);
182 OBD_FREE(imp_conn, sizeof(*imp_conn));
183 CDEBUG(D_HA, "imp %p@%s: remove connection %s\n",
184 imp, imp->imp_obd->obd_name, uuid->uuid);
185 rc = 0;
186 break;
187 }
188 out:
189 spin_unlock(&imp->imp_lock);
190 if (rc == -ENOENT)
191 CERROR("connection %s not found\n", uuid->uuid);
192 return rc;
193 }
194 EXPORT_SYMBOL(client_import_del_conn);
195
196 /**
197 * Find conn UUID by peer NID. \a peer is a server NID. This function is used
198 * to find a conn uuid of \a imp which can reach \a peer.
199 */
client_import_find_conn(struct obd_import * imp,lnet_nid_t peer,struct obd_uuid * uuid)200 int client_import_find_conn(struct obd_import *imp, lnet_nid_t peer,
201 struct obd_uuid *uuid)
202 {
203 struct obd_import_conn *conn;
204 int rc = -ENOENT;
205
206 spin_lock(&imp->imp_lock);
207 list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
208 /* Check if conn UUID does have this peer NID. */
209 if (class_check_uuid(&conn->oic_uuid, peer)) {
210 *uuid = conn->oic_uuid;
211 rc = 0;
212 break;
213 }
214 }
215 spin_unlock(&imp->imp_lock);
216 return rc;
217 }
218 EXPORT_SYMBOL(client_import_find_conn);
219
client_destroy_import(struct obd_import * imp)220 void client_destroy_import(struct obd_import *imp)
221 {
222 /* Drop security policy instance after all RPCs have finished/aborted
223 * to let all busy contexts be released. */
224 class_import_get(imp);
225 class_destroy_import(imp);
226 sptlrpc_import_sec_put(imp);
227 class_import_put(imp);
228 }
229 EXPORT_SYMBOL(client_destroy_import);
230
231 /**
232 * Check whether or not the OSC is on MDT.
233 * In the config log,
234 * osc on MDT
235 * setup 0:{fsname}-OSTxxxx-osc[-MDTxxxx] 1:lustre-OST0000_UUID 2:NID
236 * osc on client
237 * setup 0:{fsname}-OSTxxxx-osc 1:lustre-OST0000_UUID 2:NID
238 *
239 **/
osc_on_mdt(char * obdname)240 static int osc_on_mdt(char *obdname)
241 {
242 char *ptr;
243
244 ptr = strrchr(obdname, '-');
245 if (ptr == NULL)
246 return 0;
247
248 if (strncmp(ptr + 1, "MDT", 3) == 0)
249 return 1;
250
251 return 0;
252 }
253
254 /* Configure an RPC client OBD device.
255 *
256 * lcfg parameters:
257 * 1 - client UUID
258 * 2 - server UUID
259 * 3 - inactive-on-startup
260 */
client_obd_setup(struct obd_device * obddev,struct lustre_cfg * lcfg)261 int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
262 {
263 struct client_obd *cli = &obddev->u.cli;
264 struct obd_import *imp;
265 struct obd_uuid server_uuid;
266 int rq_portal, rp_portal, connect_op;
267 char *name = obddev->obd_type->typ_name;
268 ldlm_ns_type_t ns_type = LDLM_NS_TYPE_UNKNOWN;
269 int rc;
270
271 /* In a more perfect world, we would hang a ptlrpc_client off of
272 * obd_type and just use the values from there. */
273 if (!strcmp(name, LUSTRE_OSC_NAME)) {
274 rq_portal = OST_REQUEST_PORTAL;
275 rp_portal = OSC_REPLY_PORTAL;
276 connect_op = OST_CONNECT;
277 cli->cl_sp_me = LUSTRE_SP_CLI;
278 cli->cl_sp_to = LUSTRE_SP_OST;
279 ns_type = LDLM_NS_TYPE_OSC;
280 } else if (!strcmp(name, LUSTRE_MDC_NAME) ||
281 !strcmp(name, LUSTRE_LWP_NAME)) {
282 rq_portal = MDS_REQUEST_PORTAL;
283 rp_portal = MDC_REPLY_PORTAL;
284 connect_op = MDS_CONNECT;
285 cli->cl_sp_me = LUSTRE_SP_CLI;
286 cli->cl_sp_to = LUSTRE_SP_MDT;
287 ns_type = LDLM_NS_TYPE_MDC;
288 } else if (!strcmp(name, LUSTRE_OSP_NAME)) {
289 if (strstr(lustre_cfg_buf(lcfg, 1), "OST") == NULL) {
290 /* OSP_on_MDT for other MDTs */
291 connect_op = MDS_CONNECT;
292 cli->cl_sp_to = LUSTRE_SP_MDT;
293 ns_type = LDLM_NS_TYPE_MDC;
294 rq_portal = OUT_PORTAL;
295 } else {
296 /* OSP on MDT for OST */
297 connect_op = OST_CONNECT;
298 cli->cl_sp_to = LUSTRE_SP_OST;
299 ns_type = LDLM_NS_TYPE_OSC;
300 rq_portal = OST_REQUEST_PORTAL;
301 }
302 rp_portal = OSC_REPLY_PORTAL;
303 cli->cl_sp_me = LUSTRE_SP_CLI;
304 } else if (!strcmp(name, LUSTRE_MGC_NAME)) {
305 rq_portal = MGS_REQUEST_PORTAL;
306 rp_portal = MGC_REPLY_PORTAL;
307 connect_op = MGS_CONNECT;
308 cli->cl_sp_me = LUSTRE_SP_MGC;
309 cli->cl_sp_to = LUSTRE_SP_MGS;
310 cli->cl_flvr_mgc.sf_rpc = SPTLRPC_FLVR_INVALID;
311 ns_type = LDLM_NS_TYPE_MGC;
312 } else {
313 CERROR("unknown client OBD type \"%s\", can't setup\n",
314 name);
315 return -EINVAL;
316 }
317
318 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
319 CERROR("requires a TARGET UUID\n");
320 return -EINVAL;
321 }
322
323 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > 37) {
324 CERROR("client UUID must be less than 38 characters\n");
325 return -EINVAL;
326 }
327
328 if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) {
329 CERROR("setup requires a SERVER UUID\n");
330 return -EINVAL;
331 }
332
333 if (LUSTRE_CFG_BUFLEN(lcfg, 2) > 37) {
334 CERROR("target UUID must be less than 38 characters\n");
335 return -EINVAL;
336 }
337
338 init_rwsem(&cli->cl_sem);
339 mutex_init(&cli->cl_mgc_mutex);
340 cli->cl_conn_count = 0;
341 memcpy(server_uuid.uuid, lustre_cfg_buf(lcfg, 2),
342 min_t(unsigned int, LUSTRE_CFG_BUFLEN(lcfg, 2),
343 sizeof(server_uuid)));
344
345 cli->cl_dirty = 0;
346 cli->cl_avail_grant = 0;
347 /* FIXME: Should limit this for the sum of all cl_dirty_max. */
348 cli->cl_dirty_max = OSC_MAX_DIRTY_DEFAULT * 1024 * 1024;
349 if (cli->cl_dirty_max >> PAGE_CACHE_SHIFT > totalram_pages / 8)
350 cli->cl_dirty_max = totalram_pages << (PAGE_CACHE_SHIFT - 3);
351 INIT_LIST_HEAD(&cli->cl_cache_waiters);
352 INIT_LIST_HEAD(&cli->cl_loi_ready_list);
353 INIT_LIST_HEAD(&cli->cl_loi_hp_ready_list);
354 INIT_LIST_HEAD(&cli->cl_loi_write_list);
355 INIT_LIST_HEAD(&cli->cl_loi_read_list);
356 client_obd_list_lock_init(&cli->cl_loi_list_lock);
357 atomic_set(&cli->cl_pending_w_pages, 0);
358 atomic_set(&cli->cl_pending_r_pages, 0);
359 cli->cl_r_in_flight = 0;
360 cli->cl_w_in_flight = 0;
361
362 spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
363 spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
364 spin_lock_init(&cli->cl_read_page_hist.oh_lock);
365 spin_lock_init(&cli->cl_write_page_hist.oh_lock);
366 spin_lock_init(&cli->cl_read_offset_hist.oh_lock);
367 spin_lock_init(&cli->cl_write_offset_hist.oh_lock);
368
369 /* lru for osc. */
370 INIT_LIST_HEAD(&cli->cl_lru_osc);
371 atomic_set(&cli->cl_lru_shrinkers, 0);
372 atomic_set(&cli->cl_lru_busy, 0);
373 atomic_set(&cli->cl_lru_in_list, 0);
374 INIT_LIST_HEAD(&cli->cl_lru_list);
375 client_obd_list_lock_init(&cli->cl_lru_list_lock);
376
377 init_waitqueue_head(&cli->cl_destroy_waitq);
378 atomic_set(&cli->cl_destroy_in_flight, 0);
379 /* Turn on checksumming by default. */
380 cli->cl_checksum = 1;
381 /*
382 * The supported checksum types will be worked out at connect time
383 * Set cl_chksum* to CRC32 for now to avoid returning screwed info
384 * through procfs.
385 */
386 cli->cl_cksum_type = cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
387 atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS);
388
389 /* This value may be reduced at connect time in
390 * ptlrpc_connect_interpret() . We initialize it to only
391 * 1MB until we know what the performance looks like.
392 * In the future this should likely be increased. LU-1431 */
393 cli->cl_max_pages_per_rpc = min_t(int, PTLRPC_MAX_BRW_PAGES,
394 LNET_MTU >> PAGE_CACHE_SHIFT);
395
396 if (!strcmp(name, LUSTRE_MDC_NAME)) {
397 cli->cl_max_rpcs_in_flight = MDC_MAX_RIF_DEFAULT;
398 } else if (totalram_pages >> (20 - PAGE_CACHE_SHIFT) <= 128 /* MB */) {
399 cli->cl_max_rpcs_in_flight = 2;
400 } else if (totalram_pages >> (20 - PAGE_CACHE_SHIFT) <= 256 /* MB */) {
401 cli->cl_max_rpcs_in_flight = 3;
402 } else if (totalram_pages >> (20 - PAGE_CACHE_SHIFT) <= 512 /* MB */) {
403 cli->cl_max_rpcs_in_flight = 4;
404 } else {
405 if (osc_on_mdt(obddev->obd_name))
406 cli->cl_max_rpcs_in_flight = MDS_OSC_MAX_RIF_DEFAULT;
407 else
408 cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
409 }
410 rc = ldlm_get_ref();
411 if (rc) {
412 CERROR("ldlm_get_ref failed: %d\n", rc);
413 goto err;
414 }
415
416 ptlrpc_init_client(rq_portal, rp_portal, name,
417 &obddev->obd_ldlm_client);
418
419 imp = class_new_import(obddev);
420 if (imp == NULL) {
421 rc = -ENOENT;
422 goto err_ldlm;
423 }
424 imp->imp_client = &obddev->obd_ldlm_client;
425 imp->imp_connect_op = connect_op;
426 memcpy(cli->cl_target_uuid.uuid, lustre_cfg_buf(lcfg, 1),
427 LUSTRE_CFG_BUFLEN(lcfg, 1));
428 class_import_put(imp);
429
430 rc = client_import_add_conn(imp, &server_uuid, 1);
431 if (rc) {
432 CERROR("can't add initial connection\n");
433 goto err_import;
434 }
435
436 cli->cl_import = imp;
437 /* cli->cl_max_mds_{easize,cookiesize} updated by mdc_init_ea_size() */
438 cli->cl_max_mds_easize = sizeof(struct lov_mds_md_v3);
439 cli->cl_max_mds_cookiesize = sizeof(struct llog_cookie);
440
441 if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
442 if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) {
443 CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
444 name, obddev->obd_name,
445 cli->cl_target_uuid.uuid);
446 spin_lock(&imp->imp_lock);
447 imp->imp_deactive = 1;
448 spin_unlock(&imp->imp_lock);
449 }
450 }
451
452 obddev->obd_namespace = ldlm_namespace_new(obddev, obddev->obd_name,
453 LDLM_NAMESPACE_CLIENT,
454 LDLM_NAMESPACE_GREEDY,
455 ns_type);
456 if (obddev->obd_namespace == NULL) {
457 CERROR("Unable to create client namespace - %s\n",
458 obddev->obd_name);
459 rc = -ENOMEM;
460 goto err_import;
461 }
462
463 cli->cl_qchk_stat = CL_NOT_QUOTACHECKED;
464
465 return rc;
466
467 err_import:
468 class_destroy_import(imp);
469 err_ldlm:
470 ldlm_put_ref();
471 err:
472 return rc;
473
474 }
475 EXPORT_SYMBOL(client_obd_setup);
476
client_obd_cleanup(struct obd_device * obddev)477 int client_obd_cleanup(struct obd_device *obddev)
478 {
479 ldlm_namespace_free_post(obddev->obd_namespace);
480 obddev->obd_namespace = NULL;
481
482 LASSERT(obddev->u.cli.cl_import == NULL);
483
484 ldlm_put_ref();
485 return 0;
486 }
487 EXPORT_SYMBOL(client_obd_cleanup);
488
489 /* ->o_connect() method for client side (OSC and MDC and MGC) */
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)490 int client_connect_import(const struct lu_env *env,
491 struct obd_export **exp,
492 struct obd_device *obd, struct obd_uuid *cluuid,
493 struct obd_connect_data *data, void *localdata)
494 {
495 struct client_obd *cli = &obd->u.cli;
496 struct obd_import *imp = cli->cl_import;
497 struct obd_connect_data *ocd;
498 struct lustre_handle conn = { 0 };
499 int rc;
500
501 *exp = NULL;
502 down_write(&cli->cl_sem);
503 if (cli->cl_conn_count > 0) {
504 rc = -EALREADY;
505 goto out_sem;
506 }
507
508 rc = class_connect(&conn, obd, cluuid);
509 if (rc)
510 goto out_sem;
511
512 cli->cl_conn_count++;
513 *exp = class_conn2export(&conn);
514
515 LASSERT(obd->obd_namespace);
516
517 imp->imp_dlm_handle = conn;
518 rc = ptlrpc_init_import(imp);
519 if (rc != 0)
520 goto out_ldlm;
521
522 ocd = &imp->imp_connect_data;
523 if (data) {
524 *ocd = *data;
525 imp->imp_connect_flags_orig = data->ocd_connect_flags;
526 }
527
528 rc = ptlrpc_connect_import(imp);
529 if (rc != 0) {
530 LASSERT(imp->imp_state == LUSTRE_IMP_DISCON);
531 goto out_ldlm;
532 }
533 LASSERT(*exp != NULL && (*exp)->exp_connection);
534
535 if (data) {
536 LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
537 ocd->ocd_connect_flags, "old %#llx, new %#llx\n",
538 data->ocd_connect_flags, ocd->ocd_connect_flags);
539 data->ocd_connect_flags = ocd->ocd_connect_flags;
540 }
541
542 ptlrpc_pinger_add_import(imp);
543
544 if (rc) {
545 out_ldlm:
546 cli->cl_conn_count--;
547 class_disconnect(*exp);
548 *exp = NULL;
549 }
550 out_sem:
551 up_write(&cli->cl_sem);
552
553 return rc;
554 }
555 EXPORT_SYMBOL(client_connect_import);
556
client_disconnect_export(struct obd_export * exp)557 int client_disconnect_export(struct obd_export *exp)
558 {
559 struct obd_device *obd = class_exp2obd(exp);
560 struct client_obd *cli;
561 struct obd_import *imp;
562 int rc = 0, err;
563
564 if (!obd) {
565 CERROR("invalid export for disconnect: exp %p cookie %#llx\n",
566 exp, exp ? exp->exp_handle.h_cookie : -1);
567 return -EINVAL;
568 }
569
570 cli = &obd->u.cli;
571 imp = cli->cl_import;
572
573 down_write(&cli->cl_sem);
574 CDEBUG(D_INFO, "disconnect %s - %d\n", obd->obd_name,
575 cli->cl_conn_count);
576
577 if (!cli->cl_conn_count) {
578 CERROR("disconnecting disconnected device (%s)\n",
579 obd->obd_name);
580 rc = -EINVAL;
581 goto out_disconnect;
582 }
583
584 cli->cl_conn_count--;
585 if (cli->cl_conn_count) {
586 rc = 0;
587 goto out_disconnect;
588 }
589
590 /* Mark import deactivated now, so we don't try to reconnect if any
591 * of the cleanup RPCs fails (e.g. LDLM cancel, etc). We don't
592 * fully deactivate the import, or that would drop all requests. */
593 spin_lock(&imp->imp_lock);
594 imp->imp_deactive = 1;
595 spin_unlock(&imp->imp_lock);
596
597 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
598 * delete it regardless. (It's safe to delete an import that was
599 * never added.) */
600 (void)ptlrpc_pinger_del_import(imp);
601
602 if (obd->obd_namespace != NULL) {
603 /* obd_force == local only */
604 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
605 obd->obd_force ? LCF_LOCAL : 0, NULL);
606 ldlm_namespace_free_prior(obd->obd_namespace, imp,
607 obd->obd_force);
608 }
609
610 /* There's no need to hold sem while disconnecting an import,
611 * and it may actually cause deadlock in GSS. */
612 up_write(&cli->cl_sem);
613 rc = ptlrpc_disconnect_import(imp, 0);
614 down_write(&cli->cl_sem);
615
616 ptlrpc_invalidate_import(imp);
617
618 out_disconnect:
619 /* Use server style - class_disconnect should be always called for
620 * o_disconnect. */
621 err = class_disconnect(exp);
622 if (!rc && err)
623 rc = err;
624
625 up_write(&cli->cl_sem);
626
627 return rc;
628 }
629 EXPORT_SYMBOL(client_disconnect_export);
630
631
632 /**
633 * Packs current SLV and Limit into \a req.
634 */
target_pack_pool_reply(struct ptlrpc_request * req)635 int target_pack_pool_reply(struct ptlrpc_request *req)
636 {
637 struct obd_device *obd;
638
639 /* Check that we still have all structures alive as this may
640 * be some late RPC at shutdown time. */
641 if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
642 !exp_connect_lru_resize(req->rq_export))) {
643 lustre_msg_set_slv(req->rq_repmsg, 0);
644 lustre_msg_set_limit(req->rq_repmsg, 0);
645 return 0;
646 }
647
648 /* OBD is alive here as export is alive, which we checked above. */
649 obd = req->rq_export->exp_obd;
650
651 read_lock(&obd->obd_pool_lock);
652 lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
653 lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
654 read_unlock(&obd->obd_pool_lock);
655
656 return 0;
657 }
658 EXPORT_SYMBOL(target_pack_pool_reply);
659
target_send_reply_msg(struct ptlrpc_request * req,int rc,int fail_id)660 int target_send_reply_msg(struct ptlrpc_request *req, int rc, int fail_id)
661 {
662 if (OBD_FAIL_CHECK_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) {
663 DEBUG_REQ(D_ERROR, req, "dropping reply");
664 return -ECOMM;
665 }
666
667 if (unlikely(rc)) {
668 DEBUG_REQ(D_NET, req, "processing error (%d)", rc);
669 req->rq_status = rc;
670 return ptlrpc_send_error(req, 1);
671 } else {
672 DEBUG_REQ(D_NET, req, "sending reply");
673 }
674
675 return ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT);
676 }
677
target_send_reply(struct ptlrpc_request * req,int rc,int fail_id)678 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
679 {
680 struct ptlrpc_service_part *svcpt;
681 int netrc;
682 struct ptlrpc_reply_state *rs;
683 struct obd_export *exp;
684
685 if (req->rq_no_reply)
686 return;
687
688 svcpt = req->rq_rqbd->rqbd_svcpt;
689 rs = req->rq_reply_state;
690 if (rs == NULL || !rs->rs_difficult) {
691 /* no notifiers */
692 target_send_reply_msg(req, rc, fail_id);
693 return;
694 }
695
696 /* must be an export if locks saved */
697 LASSERT(req->rq_export != NULL);
698 /* req/reply consistent */
699 LASSERT(rs->rs_svcpt == svcpt);
700
701 /* "fresh" reply */
702 LASSERT(!rs->rs_scheduled);
703 LASSERT(!rs->rs_scheduled_ever);
704 LASSERT(!rs->rs_handled);
705 LASSERT(!rs->rs_on_net);
706 LASSERT(rs->rs_export == NULL);
707 LASSERT(list_empty(&rs->rs_obd_list));
708 LASSERT(list_empty(&rs->rs_exp_list));
709
710 exp = class_export_get(req->rq_export);
711
712 /* disable reply scheduling while I'm setting up */
713 rs->rs_scheduled = 1;
714 rs->rs_on_net = 1;
715 rs->rs_xid = req->rq_xid;
716 rs->rs_transno = req->rq_transno;
717 rs->rs_export = exp;
718 rs->rs_opc = lustre_msg_get_opc(req->rq_reqmsg);
719
720 spin_lock(&exp->exp_uncommitted_replies_lock);
721 CDEBUG(D_NET, "rs transno = %llu, last committed = %llu\n",
722 rs->rs_transno, exp->exp_last_committed);
723 if (rs->rs_transno > exp->exp_last_committed) {
724 /* not committed already */
725 list_add_tail(&rs->rs_obd_list,
726 &exp->exp_uncommitted_replies);
727 }
728 spin_unlock(&exp->exp_uncommitted_replies_lock);
729
730 spin_lock(&exp->exp_lock);
731 list_add_tail(&rs->rs_exp_list, &exp->exp_outstanding_replies);
732 spin_unlock(&exp->exp_lock);
733
734 netrc = target_send_reply_msg(req, rc, fail_id);
735
736 spin_lock(&svcpt->scp_rep_lock);
737
738 atomic_inc(&svcpt->scp_nreps_difficult);
739
740 if (netrc != 0) {
741 /* error sending: reply is off the net. Also we need +1
742 * reply ref until ptlrpc_handle_rs() is done
743 * with the reply state (if the send was successful, there
744 * would have been +1 ref for the net, which
745 * reply_out_callback leaves alone) */
746 rs->rs_on_net = 0;
747 ptlrpc_rs_addref(rs);
748 }
749
750 spin_lock(&rs->rs_lock);
751 if (rs->rs_transno <= exp->exp_last_committed ||
752 (!rs->rs_on_net && !rs->rs_no_ack) ||
753 list_empty(&rs->rs_exp_list) || /* completed already */
754 list_empty(&rs->rs_obd_list)) {
755 CDEBUG(D_HA, "Schedule reply immediately\n");
756 ptlrpc_dispatch_difficult_reply(rs);
757 } else {
758 list_add(&rs->rs_list, &svcpt->scp_rep_active);
759 rs->rs_scheduled = 0; /* allow notifier to schedule */
760 }
761 spin_unlock(&rs->rs_lock);
762 spin_unlock(&svcpt->scp_rep_lock);
763 }
764 EXPORT_SYMBOL(target_send_reply);
765
766 ldlm_mode_t lck_compat_array[] = {
767 [LCK_EX] = LCK_COMPAT_EX,
768 [LCK_PW] = LCK_COMPAT_PW,
769 [LCK_PR] = LCK_COMPAT_PR,
770 [LCK_CW] = LCK_COMPAT_CW,
771 [LCK_CR] = LCK_COMPAT_CR,
772 [LCK_NL] = LCK_COMPAT_NL,
773 [LCK_GROUP] = LCK_COMPAT_GROUP,
774 [LCK_COS] = LCK_COMPAT_COS,
775 };
776
777 /**
778 * Rather arbitrary mapping from LDLM error codes to errno values. This should
779 * not escape to the user level.
780 */
ldlm_error2errno(ldlm_error_t error)781 int ldlm_error2errno(ldlm_error_t error)
782 {
783 int result;
784
785 switch (error) {
786 case ELDLM_OK:
787 result = 0;
788 break;
789 case ELDLM_LOCK_CHANGED:
790 result = -ESTALE;
791 break;
792 case ELDLM_LOCK_ABORTED:
793 result = -ENAVAIL;
794 break;
795 case ELDLM_LOCK_REPLACED:
796 result = -ESRCH;
797 break;
798 case ELDLM_NO_LOCK_DATA:
799 result = -ENOENT;
800 break;
801 case ELDLM_NAMESPACE_EXISTS:
802 result = -EEXIST;
803 break;
804 case ELDLM_BAD_NAMESPACE:
805 result = -EBADF;
806 break;
807 default:
808 if (((int)error) < 0) /* cast to signed type */
809 result = error; /* as ldlm_error_t can be unsigned */
810 else {
811 CERROR("Invalid DLM result code: %d\n", error);
812 result = -EPROTO;
813 }
814 }
815 return result;
816 }
817 EXPORT_SYMBOL(ldlm_error2errno);
818
819 /**
820 * Dual to ldlm_error2errno(): maps errno values back to ldlm_error_t.
821 */
ldlm_errno2error(int err_no)822 ldlm_error_t ldlm_errno2error(int err_no)
823 {
824 int error;
825
826 switch (err_no) {
827 case 0:
828 error = ELDLM_OK;
829 break;
830 case -ESTALE:
831 error = ELDLM_LOCK_CHANGED;
832 break;
833 case -ENAVAIL:
834 error = ELDLM_LOCK_ABORTED;
835 break;
836 case -ESRCH:
837 error = ELDLM_LOCK_REPLACED;
838 break;
839 case -ENOENT:
840 error = ELDLM_NO_LOCK_DATA;
841 break;
842 case -EEXIST:
843 error = ELDLM_NAMESPACE_EXISTS;
844 break;
845 case -EBADF:
846 error = ELDLM_BAD_NAMESPACE;
847 break;
848 default:
849 error = err_no;
850 }
851 return error;
852 }
853 EXPORT_SYMBOL(ldlm_errno2error);
854
855 #if LUSTRE_TRACKS_LOCK_EXP_REFS
ldlm_dump_export_locks(struct obd_export * exp)856 void ldlm_dump_export_locks(struct obd_export *exp)
857 {
858 spin_lock(&exp->exp_locks_list_guard);
859 if (!list_empty(&exp->exp_locks_list)) {
860 struct ldlm_lock *lock;
861
862 CERROR("dumping locks for export %p,ignore if the unmount doesn't hang\n",
863 exp);
864 list_for_each_entry(lock, &exp->exp_locks_list,
865 l_exp_refs_link)
866 LDLM_ERROR(lock, "lock:");
867 }
868 spin_unlock(&exp->exp_locks_list_guard);
869 }
870 #endif
871