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, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 021110-1307, USA
24 * Copyright (c) 2013, 2017, Intel Corporation.
27 * lustre/target/tgt_handler.c
29 * Lustre Unified Target request handler code
31 * Author: Brian Behlendorf <behlendorf1@llnl.gov>
32 * Author: Mikhail Pershin <mike.pershin@intel.com>
35 #define DEBUG_SUBSYSTEM S_CLASS
37 #include <linux/user_namespace.h>
38 #ifdef HAVE_UIDGID_HEADER
39 # include <linux/uidgid.h>
43 #include <obd_class.h>
44 #include <obd_cksum.h>
45 #include <lustre_lfsck.h>
46 #include <lustre_nodemap.h>
47 #include <lustre_acl.h>
49 #include "tgt_internal.h"
51 char *tgt_name(struct lu_target *tgt)
53 LASSERT(tgt->lut_obd != NULL);
54 return tgt->lut_obd->obd_name;
56 EXPORT_SYMBOL(tgt_name);
59 * Generic code handling requests that have struct mdt_body passed in:
61 * - extract mdt_body from request and save it in @tsi, if present;
63 * - create lu_object, corresponding to the fid in mdt_body, and save it in
66 * - if HABEO_CORPUS flag is set for this request type check whether object
67 * actually exists on storage (lu_object_exists()).
70 static int tgt_mdt_body_unpack(struct tgt_session_info *tsi, __u32 flags)
72 const struct mdt_body *body;
73 struct lu_object *obj;
74 struct req_capsule *pill = tsi->tsi_pill;
79 body = req_capsule_client_get(pill, &RMF_MDT_BODY);
83 tsi->tsi_mdt_body = body;
85 if (!(body->mbo_valid & OBD_MD_FLID))
88 /* mdc_pack_body() doesn't check if fid is zero and set OBD_ML_FID
89 * in any case in pre-2.5 clients. Fix that here if needed */
90 if (unlikely(fid_is_zero(&body->mbo_fid1)))
93 if (!fid_is_sane(&body->mbo_fid1)) {
94 CERROR("%s: invalid FID: "DFID"\n", tgt_name(tsi->tsi_tgt),
95 PFID(&body->mbo_fid1));
99 obj = lu_object_find(tsi->tsi_env,
100 &tsi->tsi_tgt->lut_bottom->dd_lu_dev,
101 &body->mbo_fid1, NULL);
103 if ((flags & HABEO_CORPUS) && !lu_object_exists(obj)) {
104 lu_object_put(tsi->tsi_env, obj);
107 tsi->tsi_corpus = obj;
114 tsi->tsi_fid = body->mbo_fid1;
120 * Validate oa from client.
121 * If the request comes from 2.0 clients, currently only RSVD seq and IDIF
123 * a. objects in Single MDT FS seq = FID_SEQ_OST_MDT0, oi_id != 0
124 * b. Echo objects(seq = 2), old echo client still use oi_id/oi_seq to
125 * pack ost_id. Because non-zero oi_seq will make it diffcult to tell
126 * whether this is oi_fid or real ostid. So it will check
127 * OBD_CONNECT_FID, then convert the ostid to FID for old client.
128 * c. Old FID-disable osc will send IDIF.
129 * d. new FID-enable osc/osp will send normal FID.
131 * And also oi_id/f_oid should always start from 1. oi_id/f_oid = 0 will
132 * be used for LAST_ID file, and only being accessed inside OST now.
134 int tgt_validate_obdo(struct tgt_session_info *tsi, struct obdo *oa)
136 struct ost_id *oi = &oa->o_oi;
137 u64 seq = ostid_seq(oi);
138 u64 id = ostid_id(oi);
142 if (unlikely(!(exp_connect_flags(tsi->tsi_exp) & OBD_CONNECT_FID) &&
143 fid_seq_is_echo(seq))) {
144 /* Sigh 2.[123] client still sends echo req with oi_id = 0
145 * during create, and we will reset this to 1, since this
146 * oi_id is basically useless in the following create process,
147 * but oi_id == 0 will make it difficult to tell whether it is
148 * real FID or ost_id. */
149 oi->oi_fid.f_seq = FID_SEQ_ECHO;
150 oi->oi_fid.f_oid = id ?: 1;
151 oi->oi_fid.f_ver = 0;
153 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
155 if (unlikely((oa->o_valid & OBD_MD_FLID) && id == 0))
156 GOTO(out, rc = -EPROTO);
158 /* Note: this check might be forced in 2.5 or 2.6, i.e.
159 * all of the requests are required to setup FLGROUP */
160 if (unlikely(!(oa->o_valid & OBD_MD_FLGROUP))) {
161 ostid_set_seq_mdt0(oi);
162 oa->o_valid |= OBD_MD_FLGROUP;
166 if (unlikely(!(fid_seq_is_idif(seq) || fid_seq_is_mdt0(seq) ||
167 fid_seq_is_norm(seq) || fid_seq_is_echo(seq))))
168 GOTO(out, rc = -EPROTO);
170 rc = ostid_to_fid(&tti->tti_fid1, oi,
171 tsi->tsi_tgt->lut_lsd.lsd_osd_index);
172 if (unlikely(rc != 0))
175 oi->oi_fid = tti->tti_fid1;
181 CERROR("%s: client %s sent bad object "DOSTID": rc = %d\n",
182 tgt_name(tsi->tsi_tgt), obd_export_nid2str(tsi->tsi_exp),
186 EXPORT_SYMBOL(tgt_validate_obdo);
188 static int tgt_io_data_unpack(struct tgt_session_info *tsi, struct ost_id *oi)
191 struct niobuf_remote *rnb;
192 struct obd_ioobj *ioo;
197 ioo = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_IOOBJ);
201 rnb = req_capsule_client_get(tsi->tsi_pill, &RMF_NIOBUF_REMOTE);
205 max_brw = ioobj_max_brw_get(ioo);
206 if (unlikely((max_brw & (max_brw - 1)) != 0)) {
207 CERROR("%s: client %s sent bad ioobj max %u for "DOSTID
208 ": rc = %d\n", tgt_name(tsi->tsi_tgt),
209 obd_export_nid2str(tsi->tsi_exp), max_brw,
210 POSTID(oi), -EPROTO);
215 obj_count = req_capsule_get_size(tsi->tsi_pill, &RMF_OBD_IOOBJ,
216 RCL_CLIENT) / sizeof(*ioo);
217 if (obj_count == 0) {
218 CERROR("%s: short ioobj\n", tgt_name(tsi->tsi_tgt));
220 } else if (obj_count > 1) {
221 CERROR("%s: too many ioobjs (%d)\n", tgt_name(tsi->tsi_tgt),
226 if (ioo->ioo_bufcnt == 0) {
227 CERROR("%s: ioo has zero bufcnt\n", tgt_name(tsi->tsi_tgt));
231 if (ioo->ioo_bufcnt > PTLRPC_MAX_BRW_PAGES) {
232 DEBUG_REQ(D_RPCTRACE, tgt_ses_req(tsi),
233 "bulk has too many pages (%d)",
241 static int tgt_ost_body_unpack(struct tgt_session_info *tsi, __u32 flags)
243 struct ost_body *body;
244 struct req_capsule *pill = tsi->tsi_pill;
245 struct lu_nodemap *nodemap;
250 body = req_capsule_client_get(pill, &RMF_OST_BODY);
254 rc = tgt_validate_obdo(tsi, &body->oa);
258 nodemap = nodemap_get_from_exp(tsi->tsi_exp);
260 RETURN(PTR_ERR(nodemap));
262 body->oa.o_uid = nodemap_map_id(nodemap, NODEMAP_UID,
263 NODEMAP_CLIENT_TO_FS,
265 body->oa.o_gid = nodemap_map_id(nodemap, NODEMAP_GID,
266 NODEMAP_CLIENT_TO_FS,
268 nodemap_putref(nodemap);
270 tsi->tsi_ost_body = body;
271 tsi->tsi_fid = body->oa.o_oi.oi_fid;
273 if (req_capsule_has_field(pill, &RMF_OBD_IOOBJ, RCL_CLIENT)) {
274 rc = tgt_io_data_unpack(tsi, &body->oa.o_oi);
279 if (!(body->oa.o_valid & OBD_MD_FLID)) {
280 if (flags & HABEO_CORPUS) {
281 CERROR("%s: OBD_MD_FLID flag is not set in ost_body "
282 "but OID/FID is mandatory with HABEO_CORPUS\n",
283 tgt_name(tsi->tsi_tgt));
290 ost_fid_build_resid(&tsi->tsi_fid, &tsi->tsi_resid);
293 * OST doesn't get object in advance for further use to prevent
294 * situations with nested object_find which is potential deadlock.
296 tsi->tsi_corpus = NULL;
301 * Do necessary preprocessing according to handler ->th_flags.
303 static int tgt_request_preprocess(struct tgt_session_info *tsi,
304 struct tgt_handler *h,
305 struct ptlrpc_request *req)
307 struct req_capsule *pill = tsi->tsi_pill;
308 __u32 flags = h->th_flags;
313 if (tsi->tsi_preprocessed)
316 LASSERT(h->th_act != NULL);
317 LASSERT(h->th_opc == lustre_msg_get_opc(req->rq_reqmsg));
318 LASSERT(current->journal_info == NULL);
320 LASSERT(ergo(flags & (HABEO_CORPUS | HABEO_REFERO),
322 if (h->th_fmt != NULL) {
323 req_capsule_set(pill, h->th_fmt);
324 if (req_capsule_has_field(pill, &RMF_MDT_BODY, RCL_CLIENT)) {
325 rc = tgt_mdt_body_unpack(tsi, flags);
328 } else if (req_capsule_has_field(pill, &RMF_OST_BODY,
330 rc = tgt_ost_body_unpack(tsi, flags);
336 if (flags & MUTABOR && tgt_conn_flags(tsi) & OBD_CONNECT_RDONLY)
339 if (flags & HABEO_CLAVIS) {
340 struct ldlm_request *dlm_req;
342 LASSERT(h->th_fmt != NULL);
344 dlm_req = req_capsule_client_get(pill, &RMF_DLM_REQ);
345 if (dlm_req != NULL) {
346 union ldlm_wire_policy_data *policy =
347 &dlm_req->lock_desc.l_policy_data;
349 if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
351 (policy->l_inodebits.bits |
352 policy->l_inodebits.try_bits) == 0)) {
354 * Lock without inodebits makes no sense and
355 * will oops later in ldlm. If client miss to
356 * set such bits, do not trigger ASSERTION.
358 * For liblustre flock case, it maybe zero.
362 tsi->tsi_dlm_req = dlm_req;
368 tsi->tsi_preprocessed = 1;
373 * Invoke handler for this request opc. Also do necessary preprocessing
374 * (according to handler ->th_flags), and post-processing (setting of
375 * ->last_{xid,committed}).
377 static int tgt_handle_request0(struct tgt_session_info *tsi,
378 struct tgt_handler *h,
379 struct ptlrpc_request *req)
383 __u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
388 /* When dealing with sec context requests, no export is associated yet,
389 * because these requests are sent before *_CONNECT requests.
390 * A NULL req->rq_export means the normal *_common_slice handlers will
391 * not be called, because there is no reference to the target.
392 * So deal with them by hand and jump directly to target_send_reply().
396 case SEC_CTX_INIT_CONT:
398 CFS_FAIL_TIMEOUT(OBD_FAIL_SEC_CTX_HDL_PAUSE, cfs_fail_val);
403 * Checking for various OBD_FAIL_$PREF_$OPC_NET codes. _Do_ not try
404 * to put same checks into handlers like mdt_close(), mdt_reint(),
405 * etc., without talking to mdt authors first. Checking same thing
406 * there again is useless and returning 0 error without packing reply
407 * is buggy! Handlers either pack reply or return error.
409 * We return 0 here and do not send any reply in order to emulate
410 * network failure. Do not send any reply in case any of NET related
411 * fail_id has occured.
413 if (OBD_FAIL_CHECK_ORSET(h->th_fail_id, OBD_FAIL_ONCE))
415 if (unlikely(lustre_msg_get_opc(req->rq_reqmsg) == MDS_REINT &&
416 OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_MULTI_NET)))
419 rc = tgt_request_preprocess(tsi, h, req);
420 /* pack reply if reply format is fixed */
421 if (rc == 0 && h->th_flags & HABEO_REFERO) {
423 if (req_capsule_has_field(tsi->tsi_pill, &RMF_MDT_MD,
425 req_capsule_set_size(tsi->tsi_pill, &RMF_MDT_MD,
427 tsi->tsi_mdt_body->mbo_eadatasize);
428 if (req_capsule_has_field(tsi->tsi_pill, &RMF_LOGCOOKIES,
430 req_capsule_set_size(tsi->tsi_pill, &RMF_LOGCOOKIES,
432 if (req_capsule_has_field(tsi->tsi_pill, &RMF_ACL, RCL_SERVER))
433 req_capsule_set_size(tsi->tsi_pill,
434 &RMF_ACL, RCL_SERVER,
435 LUSTRE_POSIX_ACL_MAX_SIZE_OLD);
437 if (req_capsule_has_field(tsi->tsi_pill, &RMF_SHORT_IO,
439 struct niobuf_remote *remote_nb =
440 req_capsule_client_get(tsi->tsi_pill,
442 struct ost_body *body = tsi->tsi_ost_body;
444 req_capsule_set_size(tsi->tsi_pill, &RMF_SHORT_IO,
446 (body->oa.o_flags & OBD_FL_SHORT_IO) ?
447 remote_nb[0].rnb_len : 0);
450 rc = req_capsule_server_pack(tsi->tsi_pill);
453 if (likely(rc == 0)) {
455 * Process request, there can be two types of rc:
456 * 1) errors with msg unpack/pack, other failures outside the
457 * operation itself. This is counted as serious errors;
458 * 2) errors during fs operation, should be placed in rq_status
462 if (!is_serious(rc) &&
463 !req->rq_no_reply && req->rq_reply_state == NULL) {
464 DEBUG_REQ(D_ERROR, req, "%s \"handler\" %s did not "
465 "pack reply and returned 0 error\n",
466 tgt_name(tsi->tsi_tgt), h->th_name);
469 serious = is_serious(rc);
470 rc = clear_serious(rc);
478 * ELDLM_* codes which > 0 should be in rq_status only as well as
479 * all non-serious errors.
481 if (rc > 0 || !serious)
484 LASSERT(current->journal_info == NULL);
486 if (likely(rc == 0 && req->rq_export))
487 target_committed_to_req(req);
490 target_send_reply(req, rc, tsi->tsi_reply_fail_id);
494 static int tgt_filter_recovery_request(struct ptlrpc_request *req,
495 struct obd_device *obd, int *process)
497 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
504 case MDS_SYNC: /* used in unmounting */
518 case MDS_HSM_PROGRESS:
519 case MDS_HSM_STATE_SET:
520 case MDS_HSM_REQUEST:
521 *process = target_queue_recovery_request(req, obd);
525 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
532 * Handle recovery. Return:
533 * +1: continue request processing;
534 * -ve: abort immediately with the given error code;
535 * 0: send reply with error code in req->rq_status;
537 static int tgt_handle_recovery(struct ptlrpc_request *req, int reply_fail_id)
541 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
546 case SEC_CTX_INIT_CONT:
551 if (!req->rq_export->exp_obd->obd_replayable)
554 /* sanity check: if the xid matches, the request must be marked as a
555 * resent or replayed */
556 if (req_can_reconstruct(req, NULL)) {
557 if (!(lustre_msg_get_flags(req->rq_reqmsg) &
558 (MSG_RESENT | MSG_REPLAY))) {
559 DEBUG_REQ(D_WARNING, req, "rq_xid %llu matches "
560 "saved xid, expected REPLAY or RESENT flag "
562 lustre_msg_get_flags(req->rq_reqmsg));
563 req->rq_status = -ENOTCONN;
567 /* else: note the opposite is not always true; a RESENT req after a
568 * failover will usually not match the last_xid, since it was likely
569 * never committed. A REPLAYed request will almost never match the
570 * last xid, however it could for a committed, but still retained,
573 /* Check for aborted recovery... */
574 if (unlikely(req->rq_export->exp_obd->obd_recovering)) {
578 DEBUG_REQ(D_INFO, req, "Got new replay");
579 rc = tgt_filter_recovery_request(req, req->rq_export->exp_obd,
581 if (rc != 0 || !should_process)
583 else if (should_process < 0) {
584 req->rq_status = should_process;
585 rc = ptlrpc_error(req);
592 /* Initial check for request, it is validation mostly */
593 static struct tgt_handler *tgt_handler_find_check(struct ptlrpc_request *req)
595 struct tgt_handler *h;
596 struct tgt_opc_slice *s;
597 struct lu_target *tgt;
598 __u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
602 tgt = class_exp2tgt(req->rq_export);
603 if (unlikely(tgt == NULL)) {
604 DEBUG_REQ(D_ERROR, req, "%s: No target for connected export\n",
605 class_exp2obd(req->rq_export)->obd_name);
606 RETURN(ERR_PTR(-EINVAL));
609 for (s = tgt->lut_slice; s->tos_hs != NULL; s++)
610 if (s->tos_opc_start <= opc && opc < s->tos_opc_end)
613 /* opcode was not found in slice */
614 if (unlikely(s->tos_hs == NULL)) {
615 CERROR("%s: no handlers for opcode 0x%x\n", tgt_name(tgt),
617 RETURN(ERR_PTR(-ENOTSUPP));
620 LASSERT(opc >= s->tos_opc_start && opc < s->tos_opc_end);
621 h = s->tos_hs + (opc - s->tos_opc_start);
622 if (unlikely(h->th_opc == 0)) {
623 CERROR("%s: unsupported opcode 0x%x\n", tgt_name(tgt), opc);
624 RETURN(ERR_PTR(-ENOTSUPP));
630 static int process_req_last_xid(struct ptlrpc_request *req)
635 /* check request's xid is consistent with export's last_xid */
636 last_xid = lustre_msg_get_last_xid(req->rq_reqmsg);
637 if (last_xid > req->rq_export->exp_last_xid)
638 req->rq_export->exp_last_xid = last_xid;
640 if (req->rq_xid == 0 ||
641 (req->rq_xid <= req->rq_export->exp_last_xid)) {
642 DEBUG_REQ(D_ERROR, req, "Unexpected xid %llx vs. "
643 "last_xid %llx\n", req->rq_xid,
644 req->rq_export->exp_last_xid);
645 /* Some request is allowed to be sent during replay,
646 * such as OUT update requests, FLD requests, so it
647 * is possible that replay requests has smaller XID
648 * than the exp_last_xid.
650 * Some non-replay requests may have smaller XID as
653 * - Client send a no_resend RPC, like statfs;
654 * - The RPC timedout (or some other error) on client,
655 * then it's removed from the unreplied list;
656 * - Client send some other request to bump the
657 * exp_last_xid on server;
658 * - The former RPC got chance to be processed;
660 if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY))
664 /* try to release in-memory reply data */
665 if (tgt_is_multimodrpcs_client(req->rq_export)) {
666 tgt_handle_received_xid(req->rq_export,
667 lustre_msg_get_last_xid(req->rq_reqmsg));
668 if (!(lustre_msg_get_flags(req->rq_reqmsg) &
669 (MSG_RESENT | MSG_REPLAY)))
670 tgt_handle_tag(req->rq_export,
671 lustre_msg_get_tag(req->rq_reqmsg));
676 int tgt_request_handle(struct ptlrpc_request *req)
678 struct tgt_session_info *tsi = tgt_ses_info(req->rq_svc_thread->t_env);
680 struct lustre_msg *msg = req->rq_reqmsg;
681 struct tgt_handler *h;
682 struct lu_target *tgt;
683 int request_fail_id = 0;
684 __u32 opc = lustre_msg_get_opc(msg);
685 struct obd_device *obd;
687 bool is_connect = false;
690 /* Refill the context, to make sure all thread keys are allocated */
691 lu_env_refill(req->rq_svc_thread->t_env);
693 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
694 tsi->tsi_pill = &req->rq_pill;
695 tsi->tsi_env = req->rq_svc_thread->t_env;
697 /* if request has export then get handlers slice from corresponding
698 * target, otherwise that should be connect operation */
699 if (opc == MDS_CONNECT || opc == OST_CONNECT ||
700 opc == MGS_CONNECT) {
702 req_capsule_set(&req->rq_pill, &RQF_CONNECT);
703 rc = target_handle_connect(req);
705 rc = ptlrpc_error(req);
708 /* recovery-small test 18c asks to drop connect reply */
709 if (unlikely(opc == OST_CONNECT &&
710 OBD_FAIL_CHECK(OBD_FAIL_OST_CONNECT_NET2)))
714 if (unlikely(!class_connected_export(req->rq_export))) {
715 if (opc == SEC_CTX_INIT || opc == SEC_CTX_INIT_CONT ||
716 opc == SEC_CTX_FINI) {
717 /* sec context initialization has to be handled
718 * by hand in tgt_handle_request0() */
719 tsi->tsi_reply_fail_id = OBD_FAIL_SEC_CTX_INIT_NET;
721 GOTO(handle_recov, rc = 0);
723 CDEBUG(D_HA, "operation %d on unconnected OST from %s\n",
724 opc, libcfs_id2str(req->rq_peer));
725 req->rq_status = -ENOTCONN;
726 rc = ptlrpc_error(req);
730 tsi->tsi_tgt = tgt = class_exp2tgt(req->rq_export);
731 tsi->tsi_exp = req->rq_export;
732 if (exp_connect_flags(req->rq_export) & OBD_CONNECT_JOBSTATS)
733 tsi->tsi_jobid = lustre_msg_get_jobid(req->rq_reqmsg);
735 tsi->tsi_jobid = NULL;
738 DEBUG_REQ(D_ERROR, req, "%s: No target for connected export\n",
739 class_exp2obd(req->rq_export)->obd_name);
740 req->rq_status = -EINVAL;
741 rc = ptlrpc_error(req);
745 /* Skip last_xid processing for the recovery thread, otherwise, the
746 * last_xid on same request could be processed twice: first time when
747 * processing the incoming request, second time when the request is
748 * being processed by recovery thread. */
749 obd = class_exp2obd(req->rq_export);
751 /* reset the exp_last_xid on each connection. */
752 req->rq_export->exp_last_xid = 0;
753 } else if (obd->obd_recovery_data.trd_processing_task !=
755 rc = process_req_last_xid(req);
758 rc = ptlrpc_error(req);
763 request_fail_id = tgt->lut_request_fail_id;
764 tsi->tsi_reply_fail_id = tgt->lut_reply_fail_id;
766 h = tgt_handler_find_check(req);
768 req->rq_status = PTR_ERR(h);
769 rc = ptlrpc_error(req);
773 LASSERTF(h->th_opc == opc, "opcode mismatch %d != %d\n",
776 if (CFS_FAIL_CHECK_ORSET(request_fail_id, CFS_FAIL_ONCE))
779 rc = lustre_msg_check_version(msg, h->th_version);
781 DEBUG_REQ(D_ERROR, req, "%s: drop mal-formed request, version"
782 " %08x, expecting %08x\n", tgt_name(tgt),
783 lustre_msg_get_version(msg), h->th_version);
784 req->rq_status = -EINVAL;
785 rc = ptlrpc_error(req);
790 rc = tgt_handle_recovery(req, tsi->tsi_reply_fail_id);
791 if (likely(rc == 1)) {
792 rc = tgt_handle_request0(tsi, h, req);
798 req_capsule_fini(tsi->tsi_pill);
799 if (tsi->tsi_corpus != NULL) {
800 lu_object_put(tsi->tsi_env, tsi->tsi_corpus);
801 tsi->tsi_corpus = NULL;
805 EXPORT_SYMBOL(tgt_request_handle);
807 /** Assign high priority operations to the request if needed. */
808 int tgt_hpreq_handler(struct ptlrpc_request *req)
810 struct tgt_session_info *tsi = tgt_ses_info(req->rq_svc_thread->t_env);
811 struct tgt_handler *h;
816 if (req->rq_export == NULL)
819 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
820 tsi->tsi_pill = &req->rq_pill;
821 tsi->tsi_env = req->rq_svc_thread->t_env;
822 tsi->tsi_tgt = class_exp2tgt(req->rq_export);
823 tsi->tsi_exp = req->rq_export;
825 h = tgt_handler_find_check(req);
831 rc = tgt_request_preprocess(tsi, h, req);
832 if (unlikely(rc != 0))
835 if (h->th_hp != NULL)
839 EXPORT_SYMBOL(tgt_hpreq_handler);
841 void tgt_counter_incr(struct obd_export *exp, int opcode)
843 lprocfs_counter_incr(exp->exp_obd->obd_stats, opcode);
844 if (exp->exp_nid_stats && exp->exp_nid_stats->nid_stats != NULL)
845 lprocfs_counter_incr(exp->exp_nid_stats->nid_stats, opcode);
847 EXPORT_SYMBOL(tgt_counter_incr);
850 * Unified target generic handlers.
853 int tgt_connect_check_sptlrpc(struct ptlrpc_request *req, struct obd_export *exp)
855 struct lu_target *tgt = class_exp2tgt(exp);
856 struct sptlrpc_flavor flvr;
860 LASSERT(tgt->lut_obd);
861 LASSERT(tgt->lut_slice);
863 /* always allow ECHO client */
864 if (unlikely(strcmp(exp->exp_obd->obd_type->typ_name,
865 LUSTRE_ECHO_NAME) == 0)) {
866 exp->exp_flvr.sf_rpc = SPTLRPC_FLVR_ANY;
870 if (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
871 read_lock(&tgt->lut_sptlrpc_lock);
872 sptlrpc_target_choose_flavor(&tgt->lut_sptlrpc_rset,
876 read_unlock(&tgt->lut_sptlrpc_lock);
878 spin_lock(&exp->exp_lock);
879 exp->exp_sp_peer = req->rq_sp_from;
880 exp->exp_flvr = flvr;
882 /* when on mgs, if no restriction is set, or if client
883 * is loopback, allow any flavor */
884 if ((strcmp(exp->exp_obd->obd_type->typ_name,
885 LUSTRE_MGS_NAME) == 0) &&
886 (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_NULL ||
887 LNET_NETTYP(LNET_NIDNET(exp->exp_connection->c_peer.nid))
889 exp->exp_flvr.sf_rpc = SPTLRPC_FLVR_ANY;
891 if (exp->exp_flvr.sf_rpc != SPTLRPC_FLVR_ANY &&
892 exp->exp_flvr.sf_rpc != req->rq_flvr.sf_rpc) {
893 CERROR("%s: unauthorized rpc flavor %x from %s, "
894 "expect %x\n", tgt_name(tgt),
896 libcfs_nid2str(req->rq_peer.nid),
897 exp->exp_flvr.sf_rpc);
900 spin_unlock(&exp->exp_lock);
902 if (exp->exp_sp_peer != req->rq_sp_from) {
903 CERROR("%s: RPC source %s doesn't match %s\n",
905 sptlrpc_part2name(req->rq_sp_from),
906 sptlrpc_part2name(exp->exp_sp_peer));
909 rc = sptlrpc_target_export_check(exp, req);
916 int tgt_adapt_sptlrpc_conf(struct lu_target *tgt)
918 struct sptlrpc_rule_set tmp_rset;
921 if (unlikely(tgt == NULL)) {
922 CERROR("No target passed");
926 sptlrpc_rule_set_init(&tmp_rset);
927 rc = sptlrpc_conf_target_get_rules(tgt->lut_obd, &tmp_rset);
929 CERROR("%s: failed get sptlrpc rules: rc = %d\n",
934 sptlrpc_target_update_exp_flavor(tgt->lut_obd, &tmp_rset);
936 write_lock(&tgt->lut_sptlrpc_lock);
937 sptlrpc_rule_set_free(&tgt->lut_sptlrpc_rset);
938 tgt->lut_sptlrpc_rset = tmp_rset;
939 write_unlock(&tgt->lut_sptlrpc_lock);
943 EXPORT_SYMBOL(tgt_adapt_sptlrpc_conf);
945 int tgt_connect(struct tgt_session_info *tsi)
947 struct ptlrpc_request *req = tgt_ses_req(tsi);
948 struct obd_connect_data *reply;
953 /* XXX: better to call this check right after getting new export but
954 * before last_rcvd slot allocation to avoid server load upon insecure
955 * connects. This is to be fixed after unifiyng all targets.
957 rc = tgt_connect_check_sptlrpc(req, tsi->tsi_exp);
961 /* To avoid exposing partially initialized connection flags, changes up
962 * to this point have been staged in reply->ocd_connect_flags. Now that
963 * connection handling has completed successfully, atomically update
964 * the connect flags in the shared export data structure. LU-1623 */
965 reply = req_capsule_server_get(tsi->tsi_pill, &RMF_CONNECT_DATA);
966 spin_lock(&tsi->tsi_exp->exp_lock);
967 *exp_connect_flags_ptr(tsi->tsi_exp) = reply->ocd_connect_flags;
968 tsi->tsi_exp->exp_connect_data.ocd_brw_size = reply->ocd_brw_size;
969 spin_unlock(&tsi->tsi_exp->exp_lock);
973 obd_disconnect(class_export_get(tsi->tsi_exp));
976 EXPORT_SYMBOL(tgt_connect);
978 int tgt_disconnect(struct tgt_session_info *tsi)
984 rc = target_handle_disconnect(tgt_ses_req(tsi));
986 RETURN(err_serious(rc));
990 EXPORT_SYMBOL(tgt_disconnect);
993 * Unified target OBD handlers
995 int tgt_obd_ping(struct tgt_session_info *tsi)
1001 rc = target_handle_ping(tgt_ses_req(tsi));
1003 RETURN(err_serious(rc));
1007 EXPORT_SYMBOL(tgt_obd_ping);
1009 int tgt_obd_log_cancel(struct tgt_session_info *tsi)
1011 return err_serious(-EOPNOTSUPP);
1014 int tgt_send_buffer(struct tgt_session_info *tsi, struct lu_rdbuf *rdbuf)
1016 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
1017 struct ptlrpc_request *req = tgt_ses_req(tsi);
1018 struct obd_export *exp = req->rq_export;
1019 struct ptlrpc_bulk_desc *desc;
1020 struct l_wait_info *lwi = &tti->tti_u.update.tti_wait_info;
1026 desc = ptlrpc_prep_bulk_exp(req, rdbuf->rb_nbufs, 1,
1027 PTLRPC_BULK_PUT_SOURCE | PTLRPC_BULK_BUF_KVEC,
1028 MDS_BULK_PORTAL, &ptlrpc_bulk_kvec_ops);
1032 for (i = 0; i < rdbuf->rb_nbufs; i++)
1033 desc->bd_frag_ops->add_iov_frag(desc,
1034 rdbuf->rb_bufs[i].lb_buf,
1035 rdbuf->rb_bufs[i].lb_len);
1037 rc = target_bulk_io(exp, desc, lwi);
1038 ptlrpc_free_bulk(desc);
1041 EXPORT_SYMBOL(tgt_send_buffer);
1043 int tgt_sendpage(struct tgt_session_info *tsi, struct lu_rdpg *rdpg, int nob)
1045 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
1046 struct ptlrpc_request *req = tgt_ses_req(tsi);
1047 struct obd_export *exp = req->rq_export;
1048 struct ptlrpc_bulk_desc *desc;
1049 struct l_wait_info *lwi = &tti->tti_u.rdpg.tti_wait_info;
1057 desc = ptlrpc_prep_bulk_exp(req, rdpg->rp_npages, 1,
1058 PTLRPC_BULK_PUT_SOURCE |
1059 PTLRPC_BULK_BUF_KIOV,
1061 &ptlrpc_bulk_kiov_pin_ops);
1065 if (!(exp_connect_flags(exp) & OBD_CONNECT_BRW_SIZE))
1066 /* old client requires reply size in it's PAGE_SIZE,
1067 * which is rdpg->rp_count */
1068 nob = rdpg->rp_count;
1070 for (i = 0, tmpcount = nob; i < rdpg->rp_npages && tmpcount > 0;
1071 i++, tmpcount -= tmpsize) {
1072 tmpsize = min_t(int, tmpcount, PAGE_SIZE);
1073 desc->bd_frag_ops->add_kiov_frag(desc, rdpg->rp_pages[i], 0,
1077 LASSERT(desc->bd_nob == nob);
1078 rc = target_bulk_io(exp, desc, lwi);
1079 ptlrpc_free_bulk(desc);
1082 EXPORT_SYMBOL(tgt_sendpage);
1085 * OBD_IDX_READ handler
1087 static int tgt_obd_idx_read(struct tgt_session_info *tsi)
1089 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
1090 struct lu_rdpg *rdpg = &tti->tti_u.rdpg.tti_rdpg;
1091 struct idx_info *req_ii, *rep_ii;
1096 memset(rdpg, 0, sizeof(*rdpg));
1097 req_capsule_set(tsi->tsi_pill, &RQF_OBD_IDX_READ);
1099 /* extract idx_info buffer from request & reply */
1100 req_ii = req_capsule_client_get(tsi->tsi_pill, &RMF_IDX_INFO);
1101 if (req_ii == NULL || req_ii->ii_magic != IDX_INFO_MAGIC)
1102 RETURN(err_serious(-EPROTO));
1104 rc = req_capsule_server_pack(tsi->tsi_pill);
1106 RETURN(err_serious(rc));
1108 rep_ii = req_capsule_server_get(tsi->tsi_pill, &RMF_IDX_INFO);
1110 RETURN(err_serious(-EFAULT));
1111 rep_ii->ii_magic = IDX_INFO_MAGIC;
1113 /* extract hash to start with */
1114 rdpg->rp_hash = req_ii->ii_hash_start;
1116 /* extract requested attributes */
1117 rdpg->rp_attrs = req_ii->ii_attrs;
1119 /* check that fid packed in request is valid and supported */
1120 if (!fid_is_sane(&req_ii->ii_fid))
1122 rep_ii->ii_fid = req_ii->ii_fid;
1125 rep_ii->ii_flags = req_ii->ii_flags;
1127 /* compute number of pages to allocate, ii_count is the number of 4KB
1129 if (req_ii->ii_count <= 0)
1130 GOTO(out, rc = -EFAULT);
1131 rdpg->rp_count = min_t(unsigned int, req_ii->ii_count << LU_PAGE_SHIFT,
1132 exp_max_brw_size(tsi->tsi_exp));
1133 rdpg->rp_npages = (rdpg->rp_count + PAGE_SIZE - 1) >> PAGE_SHIFT;
1135 /* allocate pages to store the containers */
1136 OBD_ALLOC(rdpg->rp_pages, rdpg->rp_npages * sizeof(rdpg->rp_pages[0]));
1137 if (rdpg->rp_pages == NULL)
1138 GOTO(out, rc = -ENOMEM);
1139 for (i = 0; i < rdpg->rp_npages; i++) {
1140 rdpg->rp_pages[i] = alloc_page(GFP_NOFS);
1141 if (rdpg->rp_pages[i] == NULL)
1142 GOTO(out, rc = -ENOMEM);
1145 /* populate pages with key/record pairs */
1146 rc = dt_index_read(tsi->tsi_env, tsi->tsi_tgt->lut_bottom, rep_ii, rdpg);
1150 LASSERTF(rc <= rdpg->rp_count, "dt_index_read() returned more than "
1151 "asked %d > %d\n", rc, rdpg->rp_count);
1153 /* send pages to client */
1154 rc = tgt_sendpage(tsi, rdpg, rc);
1159 if (rdpg->rp_pages) {
1160 for (i = 0; i < rdpg->rp_npages; i++)
1161 if (rdpg->rp_pages[i])
1162 __free_page(rdpg->rp_pages[i]);
1163 OBD_FREE(rdpg->rp_pages,
1164 rdpg->rp_npages * sizeof(rdpg->rp_pages[0]));
1169 struct tgt_handler tgt_obd_handlers[] = {
1170 TGT_OBD_HDL (0, OBD_PING, tgt_obd_ping),
1171 TGT_OBD_HDL_VAR(0, OBD_LOG_CANCEL, tgt_obd_log_cancel),
1172 TGT_OBD_HDL (0, OBD_IDX_READ, tgt_obd_idx_read)
1174 EXPORT_SYMBOL(tgt_obd_handlers);
1176 int tgt_sync(const struct lu_env *env, struct lu_target *tgt,
1177 struct dt_object *obj, __u64 start, __u64 end)
1183 /* if no objid is specified, it means "sync whole filesystem" */
1185 rc = dt_sync(env, tgt->lut_bottom);
1186 } else if (dt_version_get(env, obj) >
1187 tgt->lut_obd->obd_last_committed) {
1188 rc = dt_object_sync(env, obj, start, end);
1190 atomic_inc(&tgt->lut_sync_count);
1194 EXPORT_SYMBOL(tgt_sync);
1196 * Unified target DLM handlers.
1200 * Unified target BAST
1202 * Ensure data and metadata are synced to disk when lock is canceled if Sync on
1203 * Cancel (SOC) is enabled. If it's extent lock, normally sync obj is enough,
1204 * but if it's cross-MDT lock, because remote object version is not set, a
1205 * filesystem sync is needed.
1207 * \param lock server side lock
1208 * \param desc lock desc
1209 * \param data ldlm_cb_set_arg
1210 * \param flag indicates whether this cancelling or blocking callback
1211 * \retval 0 on success
1212 * \retval negative number on error
1214 static int tgt_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
1215 void *data, int flag)
1218 struct lu_target *tgt;
1219 struct dt_object *obj = NULL;
1225 tgt = class_exp2tgt(lock->l_export);
1227 if (unlikely(tgt == NULL)) {
1228 CDEBUG(D_ERROR, "%s: No target for connected export\n",
1229 class_exp2obd(lock->l_export)->obd_name);
1233 if (flag == LDLM_CB_CANCELING &&
1234 (lock->l_granted_mode & (LCK_EX | LCK_PW | LCK_GROUP)) &&
1235 (tgt->lut_sync_lock_cancel == ALWAYS_SYNC_ON_CANCEL ||
1236 (tgt->lut_sync_lock_cancel == BLOCKING_SYNC_ON_CANCEL &&
1237 ldlm_is_cbpending(lock))) &&
1238 ((exp_connect_flags(lock->l_export) & OBD_CONNECT_MDS_MDS) ||
1239 lock->l_resource->lr_type == LDLM_EXTENT)) {
1241 __u64 end = OBD_OBJECT_EOF;
1243 rc = lu_env_init(&env, LCT_DT_THREAD);
1244 if (unlikely(rc != 0))
1247 ost_fid_from_resid(&fid, &lock->l_resource->lr_name,
1248 tgt->lut_lsd.lsd_osd_index);
1250 if (lock->l_resource->lr_type == LDLM_EXTENT) {
1251 obj = dt_locate(&env, tgt->lut_bottom, &fid);
1253 GOTO(err_env, rc = PTR_ERR(obj));
1255 if (!dt_object_exists(obj))
1256 GOTO(err_put, rc = -ENOENT);
1258 start = lock->l_policy_data.l_extent.start;
1259 end = lock->l_policy_data.l_extent.end;
1262 rc = tgt_sync(&env, tgt, obj, start, end);
1264 CERROR("%s: syncing "DFID" (%llu-%llu) on lock "
1265 "cancel: rc = %d\n",
1266 tgt_name(tgt), PFID(&fid),
1267 lock->l_policy_data.l_extent.start,
1268 lock->l_policy_data.l_extent.end, rc);
1272 dt_object_put(&env, obj);
1277 rc = ldlm_server_blocking_ast(lock, desc, data, flag);
1281 static struct ldlm_callback_suite tgt_dlm_cbs = {
1282 .lcs_completion = ldlm_server_completion_ast,
1283 .lcs_blocking = tgt_blocking_ast,
1284 .lcs_glimpse = ldlm_server_glimpse_ast
1287 int tgt_enqueue(struct tgt_session_info *tsi)
1289 struct ptlrpc_request *req = tgt_ses_req(tsi);
1294 * tsi->tsi_dlm_req was already swapped and (if necessary) converted,
1295 * tsi->tsi_dlm_cbs was set by the *_req_handle() function.
1297 LASSERT(tsi->tsi_dlm_req != NULL);
1298 rc = ldlm_handle_enqueue0(tsi->tsi_exp->exp_obd->obd_namespace, req,
1299 tsi->tsi_dlm_req, &tgt_dlm_cbs);
1301 RETURN(err_serious(rc));
1303 switch (LUT_FAIL_CLASS(tsi->tsi_reply_fail_id)) {
1305 tsi->tsi_reply_fail_id = OBD_FAIL_MDS_LDLM_REPLY_NET;
1308 tsi->tsi_reply_fail_id = OBD_FAIL_OST_LDLM_REPLY_NET;
1311 tsi->tsi_reply_fail_id = OBD_FAIL_MGS_LDLM_REPLY_NET;
1314 tsi->tsi_reply_fail_id = OBD_FAIL_LDLM_REPLY;
1317 RETURN(req->rq_status);
1319 EXPORT_SYMBOL(tgt_enqueue);
1321 int tgt_convert(struct tgt_session_info *tsi)
1323 struct ptlrpc_request *req = tgt_ses_req(tsi);
1327 LASSERT(tsi->tsi_dlm_req);
1328 rc = ldlm_handle_convert0(req, tsi->tsi_dlm_req);
1330 RETURN(err_serious(rc));
1332 RETURN(req->rq_status);
1335 int tgt_bl_callback(struct tgt_session_info *tsi)
1337 return err_serious(-EOPNOTSUPP);
1340 int tgt_cp_callback(struct tgt_session_info *tsi)
1342 return err_serious(-EOPNOTSUPP);
1345 /* generic LDLM target handler */
1346 struct tgt_handler tgt_dlm_handlers[] = {
1347 TGT_DLM_HDL (HABEO_CLAVIS, LDLM_ENQUEUE, tgt_enqueue),
1348 TGT_DLM_HDL_VAR(HABEO_CLAVIS, LDLM_CONVERT, tgt_convert),
1349 TGT_DLM_HDL_VAR(0, LDLM_BL_CALLBACK, tgt_bl_callback),
1350 TGT_DLM_HDL_VAR(0, LDLM_CP_CALLBACK, tgt_cp_callback)
1352 EXPORT_SYMBOL(tgt_dlm_handlers);
1355 * Unified target LLOG handlers.
1357 int tgt_llog_open(struct tgt_session_info *tsi)
1363 rc = llog_origin_handle_open(tgt_ses_req(tsi));
1367 EXPORT_SYMBOL(tgt_llog_open);
1369 int tgt_llog_close(struct tgt_session_info *tsi)
1375 rc = llog_origin_handle_close(tgt_ses_req(tsi));
1379 EXPORT_SYMBOL(tgt_llog_close);
1382 int tgt_llog_destroy(struct tgt_session_info *tsi)
1388 rc = llog_origin_handle_destroy(tgt_ses_req(tsi));
1393 int tgt_llog_read_header(struct tgt_session_info *tsi)
1399 rc = llog_origin_handle_read_header(tgt_ses_req(tsi));
1403 EXPORT_SYMBOL(tgt_llog_read_header);
1405 int tgt_llog_next_block(struct tgt_session_info *tsi)
1411 rc = llog_origin_handle_next_block(tgt_ses_req(tsi));
1415 EXPORT_SYMBOL(tgt_llog_next_block);
1417 int tgt_llog_prev_block(struct tgt_session_info *tsi)
1423 rc = llog_origin_handle_prev_block(tgt_ses_req(tsi));
1427 EXPORT_SYMBOL(tgt_llog_prev_block);
1429 /* generic llog target handler */
1430 struct tgt_handler tgt_llog_handlers[] = {
1431 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_CREATE, tgt_llog_open),
1432 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_NEXT_BLOCK, tgt_llog_next_block),
1433 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_READ_HEADER, tgt_llog_read_header),
1434 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_PREV_BLOCK, tgt_llog_prev_block),
1435 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_DESTROY, tgt_llog_destroy),
1436 TGT_LLOG_HDL_VAR(0, LLOG_ORIGIN_HANDLE_CLOSE, tgt_llog_close),
1438 EXPORT_SYMBOL(tgt_llog_handlers);
1441 * sec context handlers
1443 /* XXX: Implement based on mdt_sec_ctx_handle()? */
1444 static int tgt_sec_ctx_handle(struct tgt_session_info *tsi)
1449 struct tgt_handler tgt_sec_ctx_handlers[] = {
1450 TGT_SEC_HDL_VAR(0, SEC_CTX_INIT, tgt_sec_ctx_handle),
1451 TGT_SEC_HDL_VAR(0, SEC_CTX_INIT_CONT, tgt_sec_ctx_handle),
1452 TGT_SEC_HDL_VAR(0, SEC_CTX_FINI, tgt_sec_ctx_handle),
1454 EXPORT_SYMBOL(tgt_sec_ctx_handlers);
1456 int (*tgt_lfsck_in_notify_local)(const struct lu_env *env,
1457 struct dt_device *key,
1458 struct lfsck_req_local *lrl,
1459 struct thandle *th) = NULL;
1461 void tgt_register_lfsck_in_notify_local(int (*notify)(const struct lu_env *,
1463 struct lfsck_req_local *,
1466 tgt_lfsck_in_notify_local = notify;
1468 EXPORT_SYMBOL(tgt_register_lfsck_in_notify_local);
1470 int (*tgt_lfsck_in_notify)(const struct lu_env *env,
1471 struct dt_device *key,
1472 struct lfsck_request *lr) = NULL;
1474 void tgt_register_lfsck_in_notify(int (*notify)(const struct lu_env *,
1476 struct lfsck_request *))
1478 tgt_lfsck_in_notify = notify;
1480 EXPORT_SYMBOL(tgt_register_lfsck_in_notify);
1482 static int (*tgt_lfsck_query)(const struct lu_env *env,
1483 struct dt_device *key,
1484 struct lfsck_request *req,
1485 struct lfsck_reply *rep,
1486 struct lfsck_query *que) = NULL;
1488 void tgt_register_lfsck_query(int (*query)(const struct lu_env *,
1490 struct lfsck_request *,
1491 struct lfsck_reply *,
1492 struct lfsck_query *))
1494 tgt_lfsck_query = query;
1496 EXPORT_SYMBOL(tgt_register_lfsck_query);
1498 /* LFSCK request handlers */
1499 static int tgt_handle_lfsck_notify(struct tgt_session_info *tsi)
1501 const struct lu_env *env = tsi->tsi_env;
1502 struct dt_device *key = tsi->tsi_tgt->lut_bottom;
1503 struct lfsck_request *lr;
1507 lr = req_capsule_client_get(tsi->tsi_pill, &RMF_LFSCK_REQUEST);
1511 rc = tgt_lfsck_in_notify(env, key, lr);
1516 static int tgt_handle_lfsck_query(struct tgt_session_info *tsi)
1518 struct lfsck_request *request;
1519 struct lfsck_reply *reply;
1523 request = req_capsule_client_get(tsi->tsi_pill, &RMF_LFSCK_REQUEST);
1524 if (request == NULL)
1527 reply = req_capsule_server_get(tsi->tsi_pill, &RMF_LFSCK_REPLY);
1531 rc = tgt_lfsck_query(tsi->tsi_env, tsi->tsi_tgt->lut_bottom,
1532 request, reply, NULL);
1534 RETURN(rc < 0 ? rc : 0);
1537 struct tgt_handler tgt_lfsck_handlers[] = {
1538 TGT_LFSCK_HDL(HABEO_REFERO, LFSCK_NOTIFY, tgt_handle_lfsck_notify),
1539 TGT_LFSCK_HDL(HABEO_REFERO, LFSCK_QUERY, tgt_handle_lfsck_query),
1541 EXPORT_SYMBOL(tgt_lfsck_handlers);
1544 * initialize per-thread page pool (bug 5137).
1546 int tgt_io_thread_init(struct ptlrpc_thread *thread)
1548 struct tgt_thread_big_cache *tbc;
1552 LASSERT(thread != NULL);
1553 LASSERT(thread->t_data == NULL);
1555 OBD_ALLOC_LARGE(tbc, sizeof(*tbc));
1558 thread->t_data = tbc;
1561 EXPORT_SYMBOL(tgt_io_thread_init);
1564 * free per-thread pool created by tgt_thread_init().
1566 void tgt_io_thread_done(struct ptlrpc_thread *thread)
1568 struct tgt_thread_big_cache *tbc;
1572 LASSERT(thread != NULL);
1575 * be prepared to handle partially-initialized pools (because this is
1576 * called from ost_io_thread_init() for cleanup.
1578 tbc = thread->t_data;
1580 OBD_FREE_LARGE(tbc, sizeof(*tbc));
1581 thread->t_data = NULL;
1585 EXPORT_SYMBOL(tgt_io_thread_done);
1588 * Helper function for getting Data-on-MDT file server DLM lock
1589 * if asked by client.
1591 int tgt_mdt_data_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
1592 struct lustre_handle *lh, int mode, __u64 *flags)
1594 union ldlm_policy_data policy = {
1595 .l_inodebits.bits = MDS_INODELOCK_DOM,
1601 LASSERT(lh != NULL);
1602 LASSERT(ns != NULL);
1603 LASSERT(!lustre_handle_is_used(lh));
1605 rc = ldlm_cli_enqueue_local(ns, res_id, LDLM_IBITS, &policy, mode,
1606 flags, ldlm_blocking_ast,
1607 ldlm_completion_ast, ldlm_glimpse_ast,
1608 NULL, 0, LVB_T_NONE, NULL, lh);
1610 RETURN(rc == ELDLM_OK ? 0 : -EIO);
1612 EXPORT_SYMBOL(tgt_mdt_data_lock);
1614 void tgt_mdt_data_unlock(struct lustre_handle *lh, enum ldlm_mode mode)
1616 LASSERT(lustre_handle_is_used(lh));
1617 ldlm_lock_decref(lh, mode);
1619 EXPORT_SYMBOL(tgt_mdt_data_unlock);
1622 * Helper function for getting server side [start, start+count] DLM lock
1623 * if asked by client.
1625 int tgt_extent_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
1626 __u64 start, __u64 end, struct lustre_handle *lh,
1627 int mode, __u64 *flags)
1629 union ldlm_policy_data policy;
1634 LASSERT(lh != NULL);
1635 LASSERT(ns != NULL);
1636 LASSERT(!lustre_handle_is_used(lh));
1638 policy.l_extent.gid = 0;
1639 policy.l_extent.start = start & PAGE_MASK;
1642 * If ->o_blocks is EOF it means "lock till the end of the file".
1643 * Otherwise, it's size of an extent or hole being punched (in bytes).
1645 if (end == OBD_OBJECT_EOF || end < start)
1646 policy.l_extent.end = OBD_OBJECT_EOF;
1648 policy.l_extent.end = end | ~PAGE_MASK;
1650 rc = ldlm_cli_enqueue_local(ns, res_id, LDLM_EXTENT, &policy, mode,
1651 flags, ldlm_blocking_ast,
1652 ldlm_completion_ast, ldlm_glimpse_ast,
1653 NULL, 0, LVB_T_NONE, NULL, lh);
1654 RETURN(rc == ELDLM_OK ? 0 : -EIO);
1656 EXPORT_SYMBOL(tgt_extent_lock);
1658 void tgt_extent_unlock(struct lustre_handle *lh, enum ldlm_mode mode)
1660 LASSERT(lustre_handle_is_used(lh));
1661 ldlm_lock_decref(lh, mode);
1663 EXPORT_SYMBOL(tgt_extent_unlock);
1665 static int tgt_brw_lock(struct obd_export *exp, struct ldlm_res_id *res_id,
1666 struct obd_ioobj *obj, struct niobuf_remote *nb,
1667 struct lustre_handle *lh, enum ldlm_mode mode)
1669 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
1671 int nrbufs = obj->ioo_bufcnt;
1677 LASSERT(mode == LCK_PR || mode == LCK_PW);
1678 LASSERT(!lustre_handle_is_used(lh));
1680 if (ns->ns_obd->obd_recovering)
1683 if (nrbufs == 0 || !(nb[0].rnb_flags & OBD_BRW_SRVLOCK))
1686 for (i = 1; i < nrbufs; i++)
1687 if (!(nb[i].rnb_flags & OBD_BRW_SRVLOCK))
1690 /* MDT IO for data-on-mdt */
1691 if (exp->exp_connect_data.ocd_connect_flags & OBD_CONNECT_IBITS)
1692 rc = tgt_mdt_data_lock(ns, res_id, lh, mode, &flags);
1694 rc = tgt_extent_lock(ns, res_id, nb[0].rnb_offset,
1695 nb[nrbufs - 1].rnb_offset +
1696 nb[nrbufs - 1].rnb_len - 1,
1701 static void tgt_brw_unlock(struct obd_ioobj *obj, struct niobuf_remote *niob,
1702 struct lustre_handle *lh, enum ldlm_mode mode)
1706 LASSERT(mode == LCK_PR || mode == LCK_PW);
1707 LASSERT((obj->ioo_bufcnt > 0 &&
1708 (niob[0].rnb_flags & OBD_BRW_SRVLOCK)) ==
1709 lustre_handle_is_used(lh));
1711 if (lustre_handle_is_used(lh))
1712 tgt_extent_unlock(lh, mode);
1715 static int tgt_checksum_niobuf(struct lu_target *tgt,
1716 struct niobuf_local *local_nb, int npages,
1717 int opc, enum cksum_types cksum_type,
1720 struct cfs_crypto_hash_desc *hdesc;
1721 unsigned int bufsize;
1723 unsigned char cfs_alg = cksum_obd2cfs(cksum_type);
1725 hdesc = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1726 if (IS_ERR(hdesc)) {
1727 CERROR("%s: unable to initialize checksum hash %s\n",
1728 tgt_name(tgt), cfs_crypto_hash_name(cfs_alg));
1729 return PTR_ERR(hdesc);
1732 CDEBUG(D_INFO, "Checksum for algo %s\n", cfs_crypto_hash_name(cfs_alg));
1733 for (i = 0; i < npages; i++) {
1734 /* corrupt the data before we compute the checksum, to
1735 * simulate a client->OST data error */
1736 if (i == 0 && opc == OST_WRITE &&
1737 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) {
1738 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
1739 int len = local_nb[i].lnb_len;
1740 struct page *np = tgt_page_to_corrupt;
1743 char *ptr = ll_kmap_atomic(local_nb[i].lnb_page,
1745 char *ptr2 = page_address(np);
1747 memcpy(ptr2 + off, ptr + off, len);
1748 memcpy(ptr2 + off, "bad3", min(4, len));
1749 ll_kunmap_atomic(ptr, KM_USER0);
1751 /* LU-8376 to preserve original index for
1752 * display in dump_all_bulk_pages() */
1755 cfs_crypto_hash_update_page(hdesc, np, off,
1759 CERROR("%s: can't alloc page for corruption\n",
1763 cfs_crypto_hash_update_page(hdesc, local_nb[i].lnb_page,
1764 local_nb[i].lnb_page_offset & ~PAGE_MASK,
1765 local_nb[i].lnb_len);
1767 /* corrupt the data after we compute the checksum, to
1768 * simulate an OST->client data error */
1769 if (i == 0 && opc == OST_READ &&
1770 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND)) {
1771 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
1772 int len = local_nb[i].lnb_len;
1773 struct page *np = tgt_page_to_corrupt;
1776 char *ptr = ll_kmap_atomic(local_nb[i].lnb_page,
1778 char *ptr2 = page_address(np);
1780 memcpy(ptr2 + off, ptr + off, len);
1781 memcpy(ptr2 + off, "bad4", min(4, len));
1782 ll_kunmap_atomic(ptr, KM_USER0);
1784 /* LU-8376 to preserve original index for
1785 * display in dump_all_bulk_pages() */
1788 cfs_crypto_hash_update_page(hdesc, np, off,
1792 CERROR("%s: can't alloc page for corruption\n",
1798 bufsize = sizeof(*cksum);
1799 err = cfs_crypto_hash_final(hdesc, (unsigned char *)cksum, &bufsize);
1804 char dbgcksum_file_name[PATH_MAX];
1806 static void dump_all_bulk_pages(struct obdo *oa, int count,
1807 struct niobuf_local *local_nb,
1808 __u32 server_cksum, __u32 client_cksum)
1816 /* will only keep dump of pages on first error for the same range in
1817 * file/fid, not during the resends/retries. */
1818 snprintf(dbgcksum_file_name, sizeof(dbgcksum_file_name),
1819 "%s-checksum_dump-ost-"DFID":[%llu-%llu]-%x-%x",
1820 (strncmp(libcfs_debug_file_path_arr, "NONE", 4) != 0 ?
1821 libcfs_debug_file_path_arr :
1822 LIBCFS_DEBUG_FILE_PATH_DEFAULT),
1823 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1824 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1825 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1826 local_nb[0].lnb_file_offset,
1827 local_nb[count-1].lnb_file_offset +
1828 local_nb[count-1].lnb_len - 1, client_cksum, server_cksum);
1829 filp = filp_open(dbgcksum_file_name,
1830 O_CREAT | O_EXCL | O_WRONLY | O_LARGEFILE, 0600);
1834 CDEBUG(D_INFO, "%s: can't open to dump pages with "
1835 "checksum error: rc = %d\n", dbgcksum_file_name,
1838 CERROR("%s: can't open to dump pages with checksum "
1839 "error: rc = %d\n", dbgcksum_file_name, rc);
1845 for (i = 0; i < count; i++) {
1846 len = local_nb[i].lnb_len;
1847 buf = kmap(local_nb[i].lnb_page);
1849 rc = vfs_write(filp, (__force const char __user *)buf,
1852 CERROR("%s: wanted to write %u but got %d "
1853 "error\n", dbgcksum_file_name, len, rc);
1858 CDEBUG(D_INFO, "%s: wrote %d bytes\n",
1859 dbgcksum_file_name, rc);
1861 kunmap(local_nb[i].lnb_page);
1865 rc = ll_vfs_fsync_range(filp, 0, LLONG_MAX, 1);
1867 CERROR("%s: sync returns %d\n", dbgcksum_file_name, rc);
1868 filp_close(filp, NULL);
1872 static int check_read_checksum(struct niobuf_local *local_nb, int npages,
1873 struct obd_export *exp, struct obdo *oa,
1874 const struct lnet_process_id *peer,
1875 __u32 client_cksum, __u32 server_cksum,
1876 enum cksum_types server_cksum_type)
1879 enum cksum_types cksum_type;
1882 /* unlikely to happen and only if resend does not occur due to cksum
1883 * control failure on Client */
1884 if (unlikely(server_cksum == client_cksum)) {
1885 CDEBUG(D_PAGE, "checksum %x confirmed upon retry\n",
1890 if (exp->exp_obd->obd_checksum_dump)
1891 dump_all_bulk_pages(oa, npages, local_nb, server_cksum,
1894 cksum_type = cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1897 if (cksum_type != server_cksum_type)
1898 msg = "the server may have not used the checksum type specified"
1899 " in the original request - likely a protocol problem";
1901 msg = "should have changed on the client or in transit";
1903 start = local_nb[0].lnb_file_offset;
1904 end = local_nb[npages-1].lnb_file_offset +
1905 local_nb[npages-1].lnb_len - 1;
1907 LCONSOLE_ERROR_MSG(0x132, "%s: BAD READ CHECKSUM: %s: from %s inode "
1908 DFID " object "DOSTID" extent [%llu-%llu], client returned csum"
1909 " %x (type %x), server csum %x (type %x)\n",
1910 exp->exp_obd->obd_name,
1911 msg, libcfs_nid2str(peer->nid),
1912 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : 0ULL,
1913 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1914 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1916 start, end, client_cksum, cksum_type, server_cksum,
1922 static int tgt_pages2shortio(struct niobuf_local *local, int npages,
1923 unsigned char *buf, int size)
1925 int i, off, len, copied = size;
1928 for (i = 0; i < npages; i++) {
1929 off = local[i].lnb_page_offset & ~PAGE_MASK;
1930 len = local[i].lnb_len;
1932 CDEBUG(D_PAGE, "index %d offset = %d len = %d left = %d\n",
1937 ptr = ll_kmap_atomic(local[i].lnb_page, KM_USER0);
1938 memcpy(buf + off, ptr, len);
1939 ll_kunmap_atomic(ptr, KM_USER0);
1943 return copied - size;
1946 int tgt_brw_read(struct tgt_session_info *tsi)
1948 struct ptlrpc_request *req = tgt_ses_req(tsi);
1949 struct ptlrpc_bulk_desc *desc = NULL;
1950 struct obd_export *exp = tsi->tsi_exp;
1951 struct niobuf_remote *remote_nb;
1952 struct niobuf_local *local_nb;
1953 struct obd_ioobj *ioo;
1954 struct ost_body *body, *repbody;
1955 struct l_wait_info lwi;
1956 struct lustre_handle lockh = { 0 };
1957 int npages, nob = 0, rc, i, no_reply = 0,
1959 struct tgt_thread_big_cache *tbc = req->rq_svc_thread->t_data;
1963 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL &&
1964 ptlrpc_req2svc(req)->srv_req_portal != MDS_IO_PORTAL) {
1965 CERROR("%s: deny read request from %s to portal %u\n",
1966 tgt_name(tsi->tsi_tgt),
1967 obd_export_nid2str(req->rq_export),
1968 ptlrpc_req2svc(req)->srv_req_portal);
1972 req->rq_bulk_read = 1;
1974 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_READ_BULK))
1977 OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, cfs_fail_val > 0 ?
1978 cfs_fail_val : (obd_timeout + 1) / 4);
1980 /* Check if there is eviction in progress, and if so, wait for it to
1982 if (unlikely(atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
1983 /* We do not care how long it takes */
1984 lwi = LWI_INTR(NULL, NULL);
1985 rc = l_wait_event(exp->exp_obd->obd_evict_inprogress_waitq,
1986 !atomic_read(&exp->exp_obd->obd_evict_inprogress),
1990 /* There must be big cache in current thread to process this request
1991 * if it is NULL then something went wrong and it wasn't allocated,
1992 * report -ENOMEM in that case */
1996 body = tsi->tsi_ost_body;
1997 LASSERT(body != NULL);
1999 ioo = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_IOOBJ);
2000 LASSERT(ioo != NULL); /* must exists after tgt_ost_body_unpack */
2002 remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
2003 LASSERT(remote_nb != NULL); /* must exists after tgt_ost_body_unpack */
2005 local_nb = tbc->local;
2007 rc = tgt_brw_lock(exp, &tsi->tsi_resid, ioo, remote_nb, &lockh,
2013 * If getting the lock took more time than
2014 * client was willing to wait, drop it. b=11330
2016 if (ktime_get_real_seconds() > req->rq_deadline ||
2017 OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
2019 CERROR("Dropping timed-out read from %s because locking object " DOSTID " took %lld seconds (limit was %lld).\n",
2020 libcfs_id2str(req->rq_peer), POSTID(&ioo->ioo_oid),
2021 ktime_get_real_seconds() - req->rq_arrival_time.tv_sec,
2022 req->rq_deadline - req->rq_arrival_time.tv_sec);
2023 GOTO(out_lock, rc = -ETIMEDOUT);
2026 repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
2027 repbody->oa = body->oa;
2029 npages = PTLRPC_MAX_BRW_PAGES;
2030 rc = obd_preprw(tsi->tsi_env, OBD_BRW_READ, exp, &repbody->oa, 1,
2031 ioo, remote_nb, &npages, local_nb);
2035 if (body->oa.o_flags & OBD_FL_SHORT_IO) {
2038 desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
2039 PTLRPC_BULK_PUT_SOURCE |
2040 PTLRPC_BULK_BUF_KIOV,
2042 &ptlrpc_bulk_kiov_nopin_ops);
2044 GOTO(out_commitrw, rc = -ENOMEM);
2048 npages_read = npages;
2049 for (i = 0; i < npages; i++) {
2050 int page_rc = local_nb[i].lnb_rc;
2059 if (page_rc != 0 && desc != NULL) { /* some data! */
2060 LASSERT(local_nb[i].lnb_page != NULL);
2061 desc->bd_frag_ops->add_kiov_frag
2062 (desc, local_nb[i].lnb_page,
2063 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2067 if (page_rc != local_nb[i].lnb_len) { /* short read */
2068 local_nb[i].lnb_len = page_rc;
2069 npages_read = i + (page_rc != 0 ? 1 : 0);
2070 /* All subsequent pages should be 0 */
2071 while (++i < npages)
2072 LASSERT(local_nb[i].lnb_rc == 0);
2076 if (OBD_FAIL_CHECK(OBD_FAIL_OST_READ_SIZE) &&
2077 nob != cfs_fail_val)
2080 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
2081 enum cksum_types cksum_type =
2082 cksum_type_unpack(body->oa.o_valid & OBD_MD_FLFLAGS ?
2083 body->oa.o_flags : 0);
2085 repbody->oa.o_flags = cksum_type_pack(cksum_type);
2086 repbody->oa.o_valid = OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
2087 rc = tgt_checksum_niobuf(tsi->tsi_tgt, local_nb,
2088 npages_read, OST_READ, cksum_type,
2089 &repbody->oa.o_cksum);
2091 GOTO(out_commitrw, rc);
2093 CDEBUG(D_PAGE, "checksum at read origin: %x\n",
2094 repbody->oa.o_cksum);
2096 /* if a resend it could be for a cksum error, so check Server
2097 * cksum with returned Client cksum (this should even cover
2098 * zero-cksum case) */
2099 if ((body->oa.o_valid & OBD_MD_FLFLAGS) &&
2100 (body->oa.o_flags & OBD_FL_RECOV_RESEND))
2101 check_read_checksum(local_nb, npages_read, exp,
2102 &body->oa, &req->rq_peer,
2104 repbody->oa.o_cksum, cksum_type);
2106 repbody->oa.o_valid = 0;
2108 /* We're finishing using body->oa as an input variable */
2110 /* Check if client was evicted while we were doing i/o before touching
2113 if (body->oa.o_flags & OBD_FL_SHORT_IO) {
2114 unsigned char *short_io_buf;
2117 short_io_buf = req_capsule_server_get(&req->rq_pill,
2119 short_io_size = req_capsule_get_size(&req->rq_pill,
2122 rc = tgt_pages2shortio(local_nb, npages_read,
2123 short_io_buf, short_io_size);
2125 req_capsule_shrink(&req->rq_pill,
2128 rc = rc > 0 ? 0 : rc;
2129 } else if (!CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)) {
2130 rc = target_bulk_io(exp, desc, &lwi);
2134 if (body->oa.o_flags & OBD_FL_SHORT_IO)
2135 req_capsule_shrink(&req->rq_pill, &RMF_SHORT_IO, 0,
2140 /* Must commit after prep above in all cases */
2141 rc = obd_commitrw(tsi->tsi_env, OBD_BRW_READ, exp, &repbody->oa, 1, ioo,
2142 remote_nb, npages, local_nb, rc);
2144 tgt_brw_unlock(ioo, remote_nb, &lockh, LCK_PR);
2146 if (desc && !CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2))
2147 ptlrpc_free_bulk(desc);
2152 ptlrpc_lprocfs_brw(req, nob);
2153 } else if (no_reply) {
2154 req->rq_no_reply = 1;
2155 /* reply out callback would free */
2156 ptlrpc_req_drop_rs(req);
2157 LCONSOLE_WARN("%s: Bulk IO read error with %s (at %s), "
2158 "client will retry: rc %d\n",
2159 exp->exp_obd->obd_name,
2160 obd_uuid2str(&exp->exp_client_uuid),
2161 obd_export_nid2str(exp), rc);
2163 /* send a bulk after reply to simulate a network delay or reordering
2164 * by a router - Note that !desc implies short io, so there is no bulk
2166 if (unlikely(CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)) &&
2168 wait_queue_head_t waitq;
2169 struct l_wait_info lwi1;
2171 CDEBUG(D_INFO, "reorder BULK\n");
2172 init_waitqueue_head(&waitq);
2174 lwi1 = LWI_TIMEOUT_INTR(cfs_time_seconds(3), NULL, NULL, NULL);
2175 l_wait_event(waitq, 0, &lwi1);
2176 target_bulk_io(exp, desc, &lwi);
2177 ptlrpc_free_bulk(desc);
2182 EXPORT_SYMBOL(tgt_brw_read);
2184 static int tgt_shortio2pages(struct niobuf_local *local, int npages,
2185 unsigned char *buf, int size)
2190 for (i = 0; i < npages; i++) {
2191 off = local[i].lnb_page_offset & ~PAGE_MASK;
2192 len = local[i].lnb_len;
2197 CDEBUG(D_PAGE, "index %d offset = %d len = %d left = %d\n",
2199 ptr = ll_kmap_atomic(local[i].lnb_page, KM_USER0);
2202 memcpy(ptr + off, buf, len < size ? len : size);
2203 ll_kunmap_atomic(ptr, KM_USER0);
2210 static void tgt_warn_on_cksum(struct ptlrpc_request *req,
2211 struct ptlrpc_bulk_desc *desc,
2212 struct niobuf_local *local_nb, int npages,
2213 u32 client_cksum, u32 server_cksum,
2216 struct obd_export *exp = req->rq_export;
2217 struct ost_body *body;
2221 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2222 LASSERT(body != NULL);
2224 if (desc && req->rq_peer.nid != desc->bd_sender) {
2226 router = libcfs_nid2str(desc->bd_sender);
2229 if (exp->exp_obd->obd_checksum_dump)
2230 dump_all_bulk_pages(&body->oa, npages, local_nb, server_cksum,
2234 CDEBUG_LIMIT(D_INFO, "client csum %x, server csum %x\n",
2235 client_cksum, server_cksum);
2239 LCONSOLE_ERROR_MSG(0x168, "%s: BAD WRITE CHECKSUM: from %s%s%s inode "
2240 DFID" object "DOSTID" extent [%llu-%llu"
2241 "]: client csum %x, server csum %x\n",
2242 exp->exp_obd->obd_name, libcfs_id2str(req->rq_peer),
2244 body->oa.o_valid & OBD_MD_FLFID ?
2245 body->oa.o_parent_seq : (__u64)0,
2246 body->oa.o_valid & OBD_MD_FLFID ?
2247 body->oa.o_parent_oid : 0,
2248 body->oa.o_valid & OBD_MD_FLFID ?
2249 body->oa.o_parent_ver : 0,
2250 POSTID(&body->oa.o_oi),
2251 local_nb[0].lnb_file_offset,
2252 local_nb[npages-1].lnb_file_offset +
2253 local_nb[npages - 1].lnb_len - 1,
2254 client_cksum, server_cksum);
2257 int tgt_brw_write(struct tgt_session_info *tsi)
2259 struct ptlrpc_request *req = tgt_ses_req(tsi);
2260 struct ptlrpc_bulk_desc *desc = NULL;
2261 struct obd_export *exp = req->rq_export;
2262 struct niobuf_remote *remote_nb;
2263 struct niobuf_local *local_nb;
2264 struct obd_ioobj *ioo;
2265 struct ost_body *body, *repbody;
2266 struct l_wait_info lwi;
2267 struct lustre_handle lockh = {0};
2269 int objcount, niocount, npages;
2271 enum cksum_types cksum_type = OBD_CKSUM_CRC32;
2272 bool no_reply = false, mmap;
2273 struct tgt_thread_big_cache *tbc = req->rq_svc_thread->t_data;
2274 bool wait_sync = false;
2278 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL &&
2279 ptlrpc_req2svc(req)->srv_req_portal != MDS_IO_PORTAL) {
2280 CERROR("%s: deny write request from %s to portal %u\n",
2281 tgt_name(tsi->tsi_tgt),
2282 obd_export_nid2str(req->rq_export),
2283 ptlrpc_req2svc(req)->srv_req_portal);
2284 RETURN(err_serious(-EPROTO));
2287 if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOSPC))
2288 RETURN(err_serious(-ENOSPC));
2289 if (OBD_FAIL_TIMEOUT(OBD_FAIL_OST_EROFS, 1))
2290 RETURN(err_serious(-EROFS));
2292 req->rq_bulk_write = 1;
2294 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
2295 RETURN(err_serious(-EIO));
2296 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK2))
2297 RETURN(err_serious(-EFAULT));
2299 /* pause before transaction has been started */
2300 CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, cfs_fail_val > 0 ?
2301 cfs_fail_val : (obd_timeout + 1) / 4);
2303 /* There must be big cache in current thread to process this request
2304 * if it is NULL then something went wrong and it wasn't allocated,
2305 * report -ENOMEM in that case */
2309 body = tsi->tsi_ost_body;
2310 LASSERT(body != NULL);
2312 ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
2313 LASSERT(ioo != NULL); /* must exists after tgt_ost_body_unpack */
2315 objcount = req_capsule_get_size(&req->rq_pill, &RMF_OBD_IOOBJ,
2316 RCL_CLIENT) / sizeof(*ioo);
2318 for (niocount = i = 0; i < objcount; i++)
2319 niocount += ioo[i].ioo_bufcnt;
2321 remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
2322 LASSERT(remote_nb != NULL); /* must exists after tgt_ost_body_unpack */
2323 if (niocount != req_capsule_get_size(&req->rq_pill,
2324 &RMF_NIOBUF_REMOTE, RCL_CLIENT) /
2326 RETURN(err_serious(-EPROTO));
2328 if ((remote_nb[0].rnb_flags & OBD_BRW_MEMALLOC) &&
2329 ptlrpc_connection_is_local(exp->exp_connection))
2330 memory_pressure_set();
2332 req_capsule_set_size(&req->rq_pill, &RMF_RCS, RCL_SERVER,
2333 niocount * sizeof(*rcs));
2334 rc = req_capsule_server_pack(&req->rq_pill);
2336 GOTO(out, rc = err_serious(rc));
2338 CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_PACK, cfs_fail_val);
2339 rcs = req_capsule_server_get(&req->rq_pill, &RMF_RCS);
2341 local_nb = tbc->local;
2343 rc = tgt_brw_lock(exp, &tsi->tsi_resid, ioo, remote_nb, &lockh,
2349 * If getting the lock took more time than
2350 * client was willing to wait, drop it. b=11330
2352 if (ktime_get_real_seconds() > req->rq_deadline ||
2353 OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
2355 CERROR("%s: Dropping timed-out write from %s because locking object " DOSTID " took %lld seconds (limit was %lld).\n",
2356 tgt_name(tsi->tsi_tgt), libcfs_id2str(req->rq_peer),
2357 POSTID(&ioo->ioo_oid),
2358 ktime_get_real_seconds() - req->rq_arrival_time.tv_sec,
2359 req->rq_deadline - req->rq_arrival_time.tv_sec);
2360 GOTO(out_lock, rc = -ETIMEDOUT);
2363 /* Because we already sync grant info with client when reconnect,
2364 * grant info will be cleared for resent req, then fed_grant and
2365 * total_grant will not be modified in following preprw_write */
2366 if (lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY)) {
2367 DEBUG_REQ(D_CACHE, req, "clear resent/replay req grant info");
2368 body->oa.o_valid &= ~OBD_MD_FLGRANT;
2371 repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
2372 if (repbody == NULL)
2373 GOTO(out_lock, rc = -ENOMEM);
2374 repbody->oa = body->oa;
2376 npages = PTLRPC_MAX_BRW_PAGES;
2377 rc = obd_preprw(tsi->tsi_env, OBD_BRW_WRITE, exp, &repbody->oa,
2378 objcount, ioo, remote_nb, &npages, local_nb);
2381 if (body->oa.o_flags & OBD_FL_SHORT_IO) {
2383 unsigned char *short_io_buf;
2385 short_io_size = req_capsule_get_size(&req->rq_pill,
2388 short_io_buf = req_capsule_client_get(&req->rq_pill,
2390 CDEBUG(D_INFO, "Client use short io for data transfer,"
2391 " size = %d\n", short_io_size);
2393 /* Copy short io buf to pages */
2394 rc = tgt_shortio2pages(local_nb, npages, short_io_buf,
2398 desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
2399 PTLRPC_BULK_GET_SINK |
2400 PTLRPC_BULK_BUF_KIOV,
2402 &ptlrpc_bulk_kiov_nopin_ops);
2404 GOTO(skip_transfer, rc = -ENOMEM);
2406 /* NB Having prepped, we must commit... */
2407 for (i = 0; i < npages; i++)
2408 desc->bd_frag_ops->add_kiov_frag(desc,
2409 local_nb[i].lnb_page,
2410 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2411 local_nb[i].lnb_len);
2413 rc = sptlrpc_svc_prep_bulk(req, desc);
2415 GOTO(skip_transfer, rc);
2417 rc = target_bulk_io(exp, desc, &lwi);
2423 if (body->oa.o_valid & OBD_MD_FLCKSUM && rc == 0) {
2424 static int cksum_counter;
2426 if (body->oa.o_valid & OBD_MD_FLFLAGS)
2427 cksum_type = cksum_type_unpack(body->oa.o_flags);
2429 repbody->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
2430 repbody->oa.o_flags &= ~OBD_FL_CKSUM_ALL;
2431 repbody->oa.o_flags |= cksum_type_pack(cksum_type);
2432 rc = tgt_checksum_niobuf(tsi->tsi_tgt, local_nb,
2433 npages, OST_WRITE, cksum_type,
2434 &repbody->oa.o_cksum);
2436 GOTO(out_commitrw, rc);
2440 if (unlikely(body->oa.o_cksum != repbody->oa.o_cksum)) {
2441 mmap = (body->oa.o_valid & OBD_MD_FLFLAGS &&
2442 body->oa.o_flags & OBD_FL_MMAP);
2444 tgt_warn_on_cksum(req, desc, local_nb, npages,
2446 repbody->oa.o_cksum, mmap);
2448 } else if ((cksum_counter & (-cksum_counter)) ==
2450 CDEBUG(D_INFO, "Checksum %u from %s OK: %x\n",
2451 cksum_counter, libcfs_id2str(req->rq_peer),
2452 repbody->oa.o_cksum);
2457 /* Must commit after prep above in all cases */
2458 rc = obd_commitrw(tsi->tsi_env, OBD_BRW_WRITE, exp, &repbody->oa,
2459 objcount, ioo, remote_nb, npages, local_nb, rc);
2460 if (rc == -ENOTCONN)
2461 /* quota acquire process has been given up because
2462 * either the client has been evicted or the client
2463 * has timed out the request already */
2466 for (i = 0; i < niocount; i++) {
2467 if (!(local_nb[i].lnb_flags & OBD_BRW_ASYNC)) {
2473 * Disable sending mtime back to the client. If the client locked the
2474 * whole object, then it has already updated the mtime on its side,
2475 * otherwise it will have to glimpse anyway (see bug 21489, comment 32)
2477 repbody->oa.o_valid &= ~(OBD_MD_FLMTIME | OBD_MD_FLATIME);
2482 /* set per-requested niobuf return codes */
2483 for (i = j = 0; i < niocount; i++) {
2484 int len = remote_nb[i].rnb_len;
2489 LASSERT(j < npages);
2490 if (local_nb[j].lnb_rc < 0)
2491 rcs[i] = local_nb[j].lnb_rc;
2492 len -= local_nb[j].lnb_len;
2497 LASSERT(j == npages);
2498 ptlrpc_lprocfs_brw(req, nob);
2501 tgt_brw_unlock(ioo, remote_nb, &lockh, LCK_PW);
2503 ptlrpc_free_bulk(desc);
2505 if (unlikely(no_reply || (exp->exp_obd->obd_no_transno && wait_sync))) {
2506 req->rq_no_reply = 1;
2507 /* reply out callback would free */
2508 ptlrpc_req_drop_rs(req);
2509 if (!exp->exp_obd->obd_no_transno)
2510 LCONSOLE_WARN("%s: Bulk IO write error with %s (at %s),"
2511 " client will retry: rc = %d\n",
2512 exp->exp_obd->obd_name,
2513 obd_uuid2str(&exp->exp_client_uuid),
2514 obd_export_nid2str(exp), rc);
2516 memory_pressure_clr();
2519 EXPORT_SYMBOL(tgt_brw_write);
2521 /* Check if request can be reconstructed from saved reply data
2522 * A copy of the reply data is returned in @trd if the pointer is not NULL
2524 bool req_can_reconstruct(struct ptlrpc_request *req,
2525 struct tg_reply_data *trd)
2527 struct tg_export_data *ted = &req->rq_export->exp_target_data;
2528 struct lsd_client_data *lcd = ted->ted_lcd;
2531 if (tgt_is_multimodrpcs_client(req->rq_export))
2532 return tgt_lookup_reply(req, trd);
2534 mutex_lock(&ted->ted_lcd_lock);
2535 found = req->rq_xid == lcd->lcd_last_xid ||
2536 req->rq_xid == lcd->lcd_last_close_xid;
2538 if (found && trd != NULL) {
2539 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE) {
2540 trd->trd_reply.lrd_xid = lcd->lcd_last_close_xid;
2541 trd->trd_reply.lrd_transno =
2542 lcd->lcd_last_close_transno;
2543 trd->trd_reply.lrd_result = lcd->lcd_last_close_result;
2545 trd->trd_reply.lrd_xid = lcd->lcd_last_xid;
2546 trd->trd_reply.lrd_transno = lcd->lcd_last_transno;
2547 trd->trd_reply.lrd_result = lcd->lcd_last_result;
2548 trd->trd_reply.lrd_data = lcd->lcd_last_data;
2549 trd->trd_pre_versions[0] = lcd->lcd_pre_versions[0];
2550 trd->trd_pre_versions[1] = lcd->lcd_pre_versions[1];
2551 trd->trd_pre_versions[2] = lcd->lcd_pre_versions[2];
2552 trd->trd_pre_versions[3] = lcd->lcd_pre_versions[3];
2555 mutex_unlock(&ted->ted_lcd_lock);
2559 EXPORT_SYMBOL(req_can_reconstruct);