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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2010, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
31 * lustre/obdecho/echo.c
33 * Author: Peter Braam <braam@clusterfs.com>
34 * Author: Andreas Dilger <adilger@clusterfs.com>
37 #define DEBUG_SUBSYSTEM S_ECHO
39 #include <obd_support.h>
40 #include <obd_class.h>
41 #include <lustre_dlm.h>
42 #include <lprocfs_status.h>
44 #include "echo_internal.h"
47 * The echo objid needs to be below 2^32, because regular FID numbers are
48 * limited to 2^32 objects in f_oid for the FID_SEQ_ECHO range. b=23335
50 #define ECHO_INIT_OID 0x10000000ULL
51 #define ECHO_HANDLE_MAGIC 0xabcd0123fedc9876ULL
53 #define ECHO_PERSISTENT_PAGES (ECHO_PERSISTENT_SIZE >> PAGE_SHIFT)
54 static struct page *echo_persistent_pages[ECHO_PERSISTENT_PAGES];
57 LPROC_ECHO_READ_BYTES = 1,
58 LPROC_ECHO_WRITE_BYTES = 2,
59 LPROC_ECHO_LAST = LPROC_ECHO_WRITE_BYTES + 1
62 struct echo_srv_device {
63 struct lu_device esd_dev;
64 struct lu_target esd_lut;
67 static inline struct echo_srv_device *echo_srv_dev(struct lu_device *d)
69 return container_of_safe(d, struct echo_srv_device, esd_dev);
72 static inline struct obd_device *echo_srv_obd(struct echo_srv_device *esd)
74 return esd->esd_dev.ld_obd;
77 static int echo_connect(const struct lu_env *env,
78 struct obd_export **exp, struct obd_device *obd,
79 struct obd_uuid *cluuid, struct obd_connect_data *data,
82 struct lustre_handle conn = { 0 };
85 data->ocd_connect_flags &= ECHO_CONNECT_SUPPORTED;
87 if (data->ocd_connect_flags & OBD_CONNECT_FLAGS2)
88 data->ocd_connect_flags2 &= ECHO_CONNECT_SUPPORTED2;
90 rc = class_connect(&conn, obd, cluuid);
92 CERROR("can't connect %d\n", rc);
95 *exp = class_conn2export(&conn);
100 static int echo_disconnect(struct obd_export *exp)
102 LASSERT(exp != NULL);
104 return server_disconnect_export(exp);
107 static int echo_init_export(struct obd_export *exp)
109 return ldlm_init_export(exp);
112 static int echo_destroy_export(struct obd_export *exp)
116 target_destroy_export(exp);
117 ldlm_destroy_export(exp);
122 static u64 echo_next_id(struct obd_device *obd)
126 spin_lock(&obd->u.echo.eo_lock);
127 id = ++obd->u.echo.eo_lastino;
128 spin_unlock(&obd->u.echo.eo_lock);
134 echo_page_debug_setup(struct page *page, int rw, u64 id,
135 __u64 offset, int len)
137 int page_offset = offset & ~PAGE_MASK;
138 char *addr = ((char *)kmap(page)) + page_offset;
140 if (len % OBD_ECHO_BLOCK_SIZE != 0)
141 CERROR("Unexpected block size %d\n", len);
144 if (rw & OBD_BRW_READ)
145 block_debug_setup(addr, OBD_ECHO_BLOCK_SIZE,
148 block_debug_setup(addr, OBD_ECHO_BLOCK_SIZE,
149 0xecc0ecc0ecc0ecc0ULL,
150 0xecc0ecc0ecc0ecc0ULL);
152 addr += OBD_ECHO_BLOCK_SIZE;
153 offset += OBD_ECHO_BLOCK_SIZE;
154 len -= OBD_ECHO_BLOCK_SIZE;
161 echo_page_debug_check(struct page *page, u64 id,
162 __u64 offset, int len)
164 int page_offset = offset & ~PAGE_MASK;
165 char *addr = ((char *)kmap(page)) + page_offset;
169 if (len % OBD_ECHO_BLOCK_SIZE != 0)
170 CERROR("Unexpected block size %d\n", len);
173 rc2 = block_debug_check("echo", addr, OBD_ECHO_BLOCK_SIZE,
176 if (rc2 != 0 && rc == 0)
179 addr += OBD_ECHO_BLOCK_SIZE;
180 offset += OBD_ECHO_BLOCK_SIZE;
181 len -= OBD_ECHO_BLOCK_SIZE;
189 static int echo_map_nb_to_lb(struct obdo *oa, struct obd_ioobj *obj,
190 struct niobuf_remote *nb, int *pages,
191 struct niobuf_local *lb, int cmd, int *left)
193 gfp_t gfp_mask = (ostid_id(&obj->ioo_oid) & 1) ?
194 GFP_HIGHUSER : GFP_KERNEL;
195 int ispersistent = ostid_id(&obj->ioo_oid) == ECHO_PERSISTENT_OBJID;
196 int debug_setup = (!ispersistent &&
197 (oa->o_valid & OBD_MD_FLFLAGS) != 0 &&
198 (oa->o_flags & OBD_FL_DEBUG_CHECK) != 0);
199 struct niobuf_local *res = lb;
200 u64 offset = nb->rnb_offset;
201 int len = nb->rnb_len;
204 int plen = PAGE_SIZE - (offset & (PAGE_SIZE - 1));
209 /* check for local buf overflow */
213 res->lnb_file_offset = offset;
215 LASSERT((res->lnb_file_offset & ~PAGE_MASK) +
216 res->lnb_len <= PAGE_SIZE);
219 ((res->lnb_file_offset >> PAGE_SHIFT) <
220 ECHO_PERSISTENT_PAGES)) {
222 echo_persistent_pages[res->lnb_file_offset >>
224 /* Take extra ref so __free_pages() can be called OK */
225 get_page(res->lnb_page);
227 res->lnb_page = alloc_page(gfp_mask);
228 if (!res->lnb_page) {
229 CERROR("can't get page for id " DOSTID"\n",
230 POSTID(&obj->ioo_oid));
233 /* set mapping so page is not considered encrypted */
234 res->lnb_page->mapping = ECHO_MAPPING_UNENCRYPTED;
237 CDEBUG(D_PAGE, "$$$$ get page %p @ %llu for %d\n",
238 res->lnb_page, res->lnb_file_offset, res->lnb_len);
240 if (cmd & OBD_BRW_READ)
241 res->lnb_rc = res->lnb_len;
244 echo_page_debug_setup(res->lnb_page, cmd,
245 ostid_id(&obj->ioo_oid),
246 res->lnb_file_offset,
260 static int echo_finalize_lb(struct obdo *oa, struct obd_ioobj *obj,
261 struct niobuf_remote *rb, int *pgs,
262 struct niobuf_local *lb, int verify)
264 struct niobuf_local *res = lb;
265 u64 start = rb->rnb_offset >> PAGE_SHIFT;
266 u64 end = (rb->rnb_offset + rb->rnb_len + PAGE_SIZE - 1) >>
268 int count = (int)(end - start);
272 for (i = 0; i < count; i++, (*pgs) ++, res++) {
273 struct page *page = res->lnb_page;
277 CERROR("null page objid %llu:%p, buf %d/%d\n",
278 ostid_id(&obj->ioo_oid), page, i,
285 CDEBUG(D_PAGE, "$$$$ use page %p, addr %p@%llu\n",
286 res->lnb_page, addr, res->lnb_file_offset);
289 int vrc = echo_page_debug_check(page,
290 ostid_id(&obj->ioo_oid),
291 res->lnb_file_offset,
293 /* check all the pages always */
294 if (vrc != 0 && rc == 0)
299 /* NB see comment above regarding persistent pages */
306 static int echo_preprw(const struct lu_env *env, int cmd,
307 struct obd_export *export, struct obdo *oa,
308 int objcount, struct obd_ioobj *obj,
309 struct niobuf_remote *nb, int *pages,
310 struct niobuf_local *res)
312 struct obd_device *obd;
319 obd = export->exp_obd;
323 /* Temp fix to stop falling foul of osc_announce_cached() */
324 oa->o_valid &= ~(OBD_MD_FLBLOCKS | OBD_MD_FLGRANT);
326 memset(res, 0, sizeof(*res) * *pages);
328 CDEBUG(D_PAGE, "%s %d obdos with %d IOs\n",
329 cmd == OBD_BRW_READ ? "reading" : "writing", objcount, *pages);
334 for (i = 0; i < objcount; i++, obj++) {
337 for (j = 0 ; j < obj->ioo_bufcnt ; j++, nb++) {
338 rc = echo_map_nb_to_lb(oa, obj, nb, pages,
339 res + *pages, cmd, &left);
341 GOTO(preprw_cleanup, rc);
343 tot_bytes += nb->rnb_len;
347 atomic_add(*pages, &obd->u.echo.eo_prep);
349 if (cmd & OBD_BRW_READ)
350 lprocfs_counter_add(obd->obd_stats, LPROC_ECHO_READ_BYTES,
353 lprocfs_counter_add(obd->obd_stats, LPROC_ECHO_WRITE_BYTES,
356 CDEBUG(D_PAGE, "%d pages allocated after prep\n",
357 atomic_read(&obd->u.echo.eo_prep));
363 * It is possible that we would rather handle errors by allow
364 * any already-set-up pages to complete, rather than tearing them
365 * all down again. I believe that this is what the in-kernel
366 * prep/commit operations do.
368 CERROR("cleaning up %u pages (%d obdos)\n", *pages, objcount);
369 for (i = 0; i < *pages; i++) {
370 kunmap(res[i].lnb_page);
372 * NB if this is a persistent page, __free_page() will just
373 * lose the extra ref gained above
375 __free_page(res[i].lnb_page);
376 res[i].lnb_page = NULL;
377 atomic_dec(&obd->u.echo.eo_prep);
383 static int echo_commitrw(const struct lu_env *env, int cmd,
384 struct obd_export *export, struct obdo *oa,
385 int objcount, struct obd_ioobj *obj,
386 struct niobuf_remote *rb, int niocount,
387 struct niobuf_local *res, int rc)
389 struct obd_device *obd;
395 obd = export->exp_obd;
400 GOTO(commitrw_cleanup, rc);
402 if ((cmd & OBD_BRW_RWMASK) == OBD_BRW_READ) {
403 CDEBUG(D_PAGE, "reading %d obdos with %d IOs\n",
406 CDEBUG(D_PAGE, "writing %d obdos with %d IOs\n",
410 if (niocount && !res) {
411 CERROR("NULL res niobuf with niocount %d\n", niocount);
415 for (i = 0; i < objcount; i++, obj++) {
416 int verify = (rc == 0 &&
417 ostid_id(&obj->ioo_oid) != ECHO_PERSISTENT_OBJID &&
418 (oa->o_valid & OBD_MD_FLFLAGS) != 0 &&
419 (oa->o_flags & OBD_FL_DEBUG_CHECK) != 0);
422 for (j = 0 ; j < obj->ioo_bufcnt ; j++, rb++) {
423 int vrc = echo_finalize_lb(oa, obj, rb, &pgs, &res[pgs],
429 GOTO(commitrw_cleanup, rc = vrc);
436 atomic_sub(pgs, &obd->u.echo.eo_prep);
438 CDEBUG(D_PAGE, "%d pages remain after commit\n",
439 atomic_read(&obd->u.echo.eo_prep));
443 atomic_sub(pgs, &obd->u.echo.eo_prep);
445 CERROR("cleaning up %d pages (%d obdos)\n",
446 niocount - pgs - 1, objcount);
448 while (pgs < niocount) {
449 struct page *page = res[pgs++].lnb_page;
454 /* NB see comment above regarding persistent pages */
456 atomic_dec(&obd->u.echo.eo_prep);
461 LPROC_SEQ_FOPS_RO_TYPE(echo, uuid);
462 static struct lprocfs_vars lprocfs_echo_obd_vars[] = {
464 .fops = &echo_uuid_fops },
468 const struct obd_ops echo_obd_ops = {
469 .o_owner = THIS_MODULE,
470 .o_connect = echo_connect,
471 .o_disconnect = echo_disconnect,
472 .o_init_export = echo_init_export,
473 .o_destroy_export = echo_destroy_export,
474 .o_preprw = echo_preprw,
475 .o_commitrw = echo_commitrw,
479 * Echo Server request handler for OST_CREATE RPC.
481 * This is part of request processing. Its simulates the object
484 * \param[in] tsi target session environment for this request
486 * \retval 0 if successful
487 * \retval negative value on error
489 static int esd_create_hdl(struct tgt_session_info *tsi)
491 const struct obdo *oa = &tsi->tsi_ost_body->oa;
492 struct obd_device *obd = tsi->tsi_exp->exp_obd;
493 struct ost_body *repbody;
498 repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
502 if (!(oa->o_mode & S_IFMT)) {
503 CERROR("%s: no type is set in obdo!\n",
504 tsi->tsi_exp->exp_obd->obd_name);
508 if (!(oa->o_valid & OBD_MD_FLTYPE)) {
509 CERROR("%s: invalid o_valid in obdo: %#llx\n",
510 tsi->tsi_exp->exp_obd->obd_name, oa->o_valid);
514 rep_oa = &repbody->oa;
516 if (!fid_seq_is_echo(ostid_seq(&oa->o_oi))) {
517 CERROR("%s: invalid seq %#llx\n",
518 tsi->tsi_exp->exp_obd->obd_name, ostid_seq(&oa->o_oi));
522 ostid_set_seq_echo(&rep_oa->o_oi);
523 ostid_set_id(&rep_oa->o_oi, echo_next_id(obd));
525 CDEBUG(D_INFO, "%s: Create object "DOSTID"\n",
526 tsi->tsi_exp->exp_obd->obd_name, POSTID(&rep_oa->o_oi));
528 rep_oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP;
534 * Echo Server request handler for OST_DESTROY RPC.
536 * This is Echo Server part of request handling. It simulates the objects
539 * \param[in] tsi target session environment for this request
541 * \retval 0 if successful
542 * \retval negative value on error
544 static int esd_destroy_hdl(struct tgt_session_info *tsi)
546 const struct obdo *oa = &tsi->tsi_ost_body->oa;
547 struct obd_device *obd = tsi->tsi_exp->exp_obd;
548 struct ost_body *repbody;
553 oid = ostid_id(&oa->o_oi);
556 if (!(oa->o_valid & OBD_MD_FLID)) {
557 CERROR("%s: obdo missing FLID valid flag: %#llx\n",
558 tsi->tsi_exp->exp_obd->obd_name, oa->o_valid);
562 repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
564 if (ostid_id(&oa->o_oi) > obd->u.echo.eo_lastino ||
565 ostid_id(&oa->o_oi) < ECHO_INIT_OID) {
566 CERROR("%s: bad objid to destroy: "DOSTID"\n",
567 tsi->tsi_exp->exp_obd->obd_name, POSTID(&oa->o_oi));
571 CDEBUG(D_INFO, "%s: Destroy object "DOSTID"\n",
572 tsi->tsi_exp->exp_obd->obd_name, POSTID(&oa->o_oi));
574 repbody->oa.o_oi = oa->o_oi;
579 * Echo Server request handler for OST_GETATTR RPC.
581 * This is Echo Server part of request handling. It returns an object
582 * attributes to the client. All objects have the same attributes in
585 * \param[in] tsi target session environment for this request
587 * \retval 0 if successful
588 * \retval negative value on error
590 static int esd_getattr_hdl(struct tgt_session_info *tsi)
592 const struct obdo *oa = &tsi->tsi_ost_body->oa;
593 struct obd_device *obd = tsi->tsi_exp->exp_obd;
594 struct ost_body *repbody;
598 if (!(oa->o_valid & OBD_MD_FLID)) {
599 CERROR("%s: obdo missing FLID valid flag: %#llx\n",
600 tsi->tsi_exp->exp_obd->obd_name, oa->o_valid);
604 repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
608 repbody->oa.o_oi = oa->o_oi;
609 repbody->oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
611 obdo_cpy_md(&repbody->oa, &obd->u.echo.eo_oa, oa->o_valid);
613 repbody->oa.o_valid |= OBD_MD_FLFLAGS;
614 repbody->oa.o_flags = OBD_FL_FLUSH;
620 * Echo Server request handler for OST_SETATTR RPC.
622 * This is Echo Server part of request handling. It sets common
623 * attributes from request to the Echo Server objects.
625 * \param[in] tsi target session environment for this request
627 * \retval 0 if successful
628 * \retval negative value on error
630 static int esd_setattr_hdl(struct tgt_session_info *tsi)
632 struct ost_body *body = tsi->tsi_ost_body;
633 struct obd_device *obd = tsi->tsi_exp->exp_obd;
634 struct ost_body *repbody;
638 if (!(body->oa.o_valid & OBD_MD_FLID)) {
639 CERROR("%s: obdo missing FLID valid flag: %#llx\n",
640 tsi->tsi_exp->exp_obd->obd_name,
645 repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
649 repbody->oa.o_oi = body->oa.o_oi;
650 repbody->oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
652 obd->u.echo.eo_oa = body->oa;
657 #define OBD_FAIL_OST_READ_NET OBD_FAIL_OST_BRW_NET
658 #define OBD_FAIL_OST_WRITE_NET OBD_FAIL_OST_BRW_NET
659 #define OST_BRW_READ OST_READ
660 #define OST_BRW_WRITE OST_WRITE
663 * Table of Echo Server specific request handlers
665 * This table contains all opcodes accepted by Echo Server and
666 * specifies handlers for them. The tgt_request_handler()
667 * uses such table from each target to process incoming
670 static struct tgt_handler esd_tgt_handlers[] = {
671 TGT_RPC_HANDLER(OST_FIRST_OPC, 0, OST_CONNECT, tgt_connect,
672 &RQF_CONNECT, LUSTRE_OBD_VERSION),
673 TGT_RPC_HANDLER(OST_FIRST_OPC, 0, OST_DISCONNECT, tgt_disconnect,
674 &RQF_OST_DISCONNECT, LUSTRE_OBD_VERSION),
675 TGT_OST_HDL(HAS_BODY | HAS_REPLY, OST_GETATTR, esd_getattr_hdl),
676 TGT_OST_HDL(HAS_BODY | HAS_REPLY | IS_MUTABLE, OST_SETATTR,
678 TGT_OST_HDL(HAS_REPLY | IS_MUTABLE, OST_CREATE, esd_create_hdl),
679 TGT_OST_HDL(HAS_REPLY | IS_MUTABLE, OST_DESTROY, esd_destroy_hdl),
680 TGT_OST_HDL(HAS_BODY | HAS_REPLY, OST_BRW_READ, tgt_brw_read),
681 TGT_OST_HDL(HAS_BODY | IS_MUTABLE, OST_BRW_WRITE, tgt_brw_write),
684 static struct tgt_opc_slice esd_common_slice[] = {
686 .tos_opc_start = OST_FIRST_OPC,
687 .tos_opc_end = OST_LAST_OPC,
688 .tos_hs = esd_tgt_handlers
691 .tos_opc_start = OBD_FIRST_OPC,
692 .tos_opc_end = OBD_LAST_OPC,
693 .tos_hs = tgt_obd_handlers
696 .tos_opc_start = LDLM_FIRST_OPC,
697 .tos_opc_end = LDLM_LAST_OPC,
698 .tos_hs = tgt_dlm_handlers
701 .tos_opc_start = SEC_FIRST_OPC,
702 .tos_opc_end = SEC_LAST_OPC,
703 .tos_hs = tgt_sec_ctx_handlers
711 * lu_device_operations matrix for ECHO SRV device is NULL,
712 * this device is just serving incoming requests immediately
713 * without building a stack of lu_devices.
715 static const struct lu_device_operations echo_srv_lu_ops = { 0 };
718 * Initialize Echo Server device with parameters in the config log \a cfg.
720 * This is the main starting point of Echo Server initialization. It fills all
721 * parameters with their initial values and starts Echo Server.
723 * \param[in] env execution environment
724 * \param[in] m Echo Server device
725 * \param[in] ldt LU device type of Echo Server
726 * \param[in] cfg configuration log
728 * \retval 0 if successful
729 * \retval negative value on error
731 static int echo_srv_init0(const struct lu_env *env,
732 struct echo_srv_device *esd,
733 struct lu_device_type *ldt, struct lustre_cfg *cfg)
735 const char *dev = lustre_cfg_string(cfg, 0);
736 struct obd_device *obd;
742 obd = class_name2obd(dev);
744 CERROR("Cannot find obd with name %s\n", dev);
748 spin_lock_init(&obd->u.echo.eo_lock);
749 obd->u.echo.eo_lastino = ECHO_INIT_OID;
751 esd->esd_dev.ld_ops = &echo_srv_lu_ops;
752 esd->esd_dev.ld_obd = obd;
753 /* set this lu_device to obd, because error handling need it */
754 obd->obd_lu_dev = &esd->esd_dev;
756 /* No connection accepted until configurations will finish */
757 spin_lock(&obd->obd_dev_lock);
758 obd->obd_no_conn = 1;
759 spin_unlock(&obd->obd_dev_lock);
761 /* non-replayable target */
762 obd->obd_replayable = 0;
764 snprintf(ns_name, sizeof(ns_name), "echotgt-%s", obd->obd_uuid.uuid);
765 obd->obd_namespace = ldlm_namespace_new(obd, ns_name,
766 LDLM_NAMESPACE_SERVER,
767 LDLM_NAMESPACE_MODEST,
769 if (IS_ERR(obd->obd_namespace)) {
770 rc = PTR_ERR(obd->obd_namespace);
771 CERROR("%s: unable to create server namespace: rc = %d\n",
773 obd->obd_namespace = NULL;
777 obd->obd_vars = lprocfs_echo_obd_vars;
778 if (!lprocfs_obd_setup(obd, true) &&
779 lprocfs_alloc_obd_stats(obd, LPROC_ECHO_LAST) == 0) {
780 lprocfs_counter_init(obd->obd_stats, LPROC_ECHO_READ_BYTES,
781 LPROCFS_CNTR_AVGMINMAX,
782 "read_bytes", "bytes");
783 lprocfs_counter_init(obd->obd_stats, LPROC_ECHO_WRITE_BYTES,
784 LPROCFS_CNTR_AVGMINMAX,
785 "write_bytes", "bytes");
788 ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
789 "echo_ldlm_cb_client", &obd->obd_ldlm_client);
791 rc = tgt_init(env, &esd->esd_lut, obd, NULL, esd_common_slice,
792 OBD_FAIL_OST_ALL_REQUEST_NET,
793 OBD_FAIL_OST_ALL_REPLY_NET);
797 spin_lock(&obd->obd_dev_lock);
798 obd->obd_no_conn = 0;
799 spin_unlock(&obd->obd_dev_lock);
804 ldlm_namespace_free(obd->obd_namespace, NULL, obd->obd_force);
805 obd->obd_namespace = NULL;
807 lprocfs_obd_cleanup(obd);
808 lprocfs_free_obd_stats(obd);
813 * Stop the Echo Server device.
815 * This function stops the Echo Server device and all its subsystems.
816 * This is the end of Echo Server lifecycle.
818 * \param[in] env execution environment
819 * \param[in] esd ESD device
821 static void echo_srv_fini(const struct lu_env *env,
822 struct echo_srv_device *esd)
824 struct obd_device *obd = echo_srv_obd(esd);
825 struct lu_device *d = &esd->esd_dev;
830 class_disconnect_exports(obd);
831 if (obd->obd_namespace)
832 ldlm_namespace_free_prior(obd->obd_namespace, NULL,
835 obd_exports_barrier(obd);
836 obd_zombie_barrier();
838 tgt_fini(env, &esd->esd_lut);
840 if (obd->obd_namespace) {
841 ldlm_namespace_free_post(obd->obd_namespace);
842 obd->obd_namespace = NULL;
845 lprocfs_obd_cleanup(obd);
846 lprocfs_free_obd_stats(obd);
848 leaked = atomic_read(&obd->u.echo.eo_prep);
850 CERROR("%d prep/commitrw pages leaked\n", leaked);
852 LASSERT(atomic_read(&d->ld_ref) == 0);
857 * Implementation of lu_device_type_operations::ldto_device_fini.
859 * Finalize device. Dual to echo_srv_device_init(). It is called from
860 * obd_precleanup() and stops the current device.
862 * \param[in] env execution environment
863 * \param[in] d LU device of ESD
867 static struct lu_device *echo_srv_device_fini(const struct lu_env *env,
871 echo_srv_fini(env, echo_srv_dev(d));
876 * Implementation of lu_device_type_operations::ldto_device_free.
878 * Free Echo Server device. Dual to echo_srv_device_alloc().
880 * \param[in] env execution environment
881 * \param[in] d LU device of ESD
885 static struct lu_device *echo_srv_device_free(const struct lu_env *env,
888 struct echo_srv_device *esd = echo_srv_dev(d);
890 lu_device_fini(&esd->esd_dev);
896 * Implementation of lu_device_type_operations::ldto_device_alloc.
898 * This function allocates the new Echo Server device. It is called from
899 * obd_setup() if OBD device had lu_device_type defined.
901 * \param[in] env execution environment
902 * \param[in] t lu_device_type of ESD device
903 * \param[in] cfg configuration log
905 * \retval pointer to the lu_device of just allocated OFD
906 * \retval ERR_PTR of return value on error
908 static struct lu_device *echo_srv_device_alloc(const struct lu_env *env,
909 struct lu_device_type *t,
910 struct lustre_cfg *cfg)
912 struct echo_srv_device *esd;
918 return ERR_PTR(-ENOMEM);
921 lu_device_init(l, t);
922 rc = echo_srv_init0(env, esd, t, cfg);
924 echo_srv_device_free(env, l);
931 static const struct lu_device_type_operations echo_srv_type_ops = {
932 .ldto_device_alloc = echo_srv_device_alloc,
933 .ldto_device_free = echo_srv_device_free,
934 .ldto_device_fini = echo_srv_device_fini
937 struct lu_device_type echo_srv_type = {
938 .ldt_tags = LU_DEVICE_DT,
939 .ldt_name = LUSTRE_ECHO_NAME,
940 .ldt_ops = &echo_srv_type_ops,
941 .ldt_ctx_tags = LCT_DT_THREAD,
944 void echo_persistent_pages_fini(void)
948 for (i = 0; i < ECHO_PERSISTENT_PAGES; i++)
949 if (echo_persistent_pages[i]) {
950 __free_page(echo_persistent_pages[i]);
951 echo_persistent_pages[i] = NULL;
955 int echo_persistent_pages_init(void)
960 for (i = 0; i < ECHO_PERSISTENT_PAGES; i++) {
961 gfp_t gfp_mask = (i < ECHO_PERSISTENT_PAGES / 2) ?
962 GFP_KERNEL : GFP_HIGHUSER;
964 pg = alloc_page(gfp_mask);
966 echo_persistent_pages_fini();
970 memset(kmap(pg), 0, PAGE_SIZE);
972 /* set mapping so page is not considered encrypted */
973 pg->mapping = ECHO_MAPPING_UNENCRYPTED;
975 echo_persistent_pages[i] = pg;