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_valid & OBD_MD_FLFLAGS &&
447 body->oa.o_flags & OBD_FL_SHORT_IO) ?
448 remote_nb[0].rnb_len : 0);
451 rc = req_capsule_server_pack(tsi->tsi_pill);
454 if (likely(rc == 0)) {
456 * Process request, there can be two types of rc:
457 * 1) errors with msg unpack/pack, other failures outside the
458 * operation itself. This is counted as serious errors;
459 * 2) errors during fs operation, should be placed in rq_status
463 if (!is_serious(rc) &&
464 !req->rq_no_reply && req->rq_reply_state == NULL) {
465 DEBUG_REQ(D_ERROR, req, "%s \"handler\" %s did not "
466 "pack reply and returned 0 error\n",
467 tgt_name(tsi->tsi_tgt), h->th_name);
470 serious = is_serious(rc);
471 rc = clear_serious(rc);
479 * ELDLM_* codes which > 0 should be in rq_status only as well as
480 * all non-serious errors.
482 if (rc > 0 || !serious)
485 LASSERT(current->journal_info == NULL);
487 if (likely(rc == 0 && req->rq_export))
488 target_committed_to_req(req);
491 target_send_reply(req, rc, tsi->tsi_reply_fail_id);
495 static int tgt_filter_recovery_request(struct ptlrpc_request *req,
496 struct obd_device *obd, int *process)
498 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
505 case MDS_SYNC: /* used in unmounting */
519 case MDS_HSM_PROGRESS:
520 case MDS_HSM_STATE_SET:
521 case MDS_HSM_REQUEST:
522 *process = target_queue_recovery_request(req, obd);
526 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
533 * Handle recovery. Return:
534 * +1: continue request processing;
535 * -ve: abort immediately with the given error code;
536 * 0: send reply with error code in req->rq_status;
538 static int tgt_handle_recovery(struct ptlrpc_request *req, int reply_fail_id)
542 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
547 case SEC_CTX_INIT_CONT:
552 if (!req->rq_export->exp_obd->obd_replayable)
555 /* sanity check: if the xid matches, the request must be marked as a
556 * resent or replayed */
557 if (req_can_reconstruct(req, NULL)) {
558 if (!(lustre_msg_get_flags(req->rq_reqmsg) &
559 (MSG_RESENT | MSG_REPLAY))) {
560 DEBUG_REQ(D_WARNING, req, "rq_xid %llu matches "
561 "saved xid, expected REPLAY or RESENT flag "
563 lustre_msg_get_flags(req->rq_reqmsg));
564 req->rq_status = -ENOTCONN;
568 /* else: note the opposite is not always true; a RESENT req after a
569 * failover will usually not match the last_xid, since it was likely
570 * never committed. A REPLAYed request will almost never match the
571 * last xid, however it could for a committed, but still retained,
574 /* Check for aborted recovery... */
575 if (unlikely(req->rq_export->exp_obd->obd_recovering)) {
579 DEBUG_REQ(D_INFO, req, "Got new replay");
580 rc = tgt_filter_recovery_request(req, req->rq_export->exp_obd,
582 if (rc != 0 || !should_process)
584 else if (should_process < 0) {
585 req->rq_status = should_process;
586 rc = ptlrpc_error(req);
593 /* Initial check for request, it is validation mostly */
594 static struct tgt_handler *tgt_handler_find_check(struct ptlrpc_request *req)
596 struct tgt_handler *h;
597 struct tgt_opc_slice *s;
598 struct lu_target *tgt;
599 __u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
603 tgt = class_exp2tgt(req->rq_export);
604 if (unlikely(tgt == NULL)) {
605 DEBUG_REQ(D_ERROR, req, "%s: No target for connected export\n",
606 class_exp2obd(req->rq_export)->obd_name);
607 RETURN(ERR_PTR(-EINVAL));
610 for (s = tgt->lut_slice; s->tos_hs != NULL; s++)
611 if (s->tos_opc_start <= opc && opc < s->tos_opc_end)
614 /* opcode was not found in slice */
615 if (unlikely(s->tos_hs == NULL)) {
616 CERROR("%s: no handlers for opcode 0x%x\n", tgt_name(tgt),
618 RETURN(ERR_PTR(-ENOTSUPP));
621 LASSERT(opc >= s->tos_opc_start && opc < s->tos_opc_end);
622 h = s->tos_hs + (opc - s->tos_opc_start);
623 if (unlikely(h->th_opc == 0)) {
624 CERROR("%s: unsupported opcode 0x%x\n", tgt_name(tgt), opc);
625 RETURN(ERR_PTR(-ENOTSUPP));
631 static int process_req_last_xid(struct ptlrpc_request *req)
636 /* check request's xid is consistent with export's last_xid */
637 last_xid = lustre_msg_get_last_xid(req->rq_reqmsg);
638 if (last_xid > req->rq_export->exp_last_xid)
639 req->rq_export->exp_last_xid = last_xid;
641 if (req->rq_xid == 0 ||
642 (req->rq_xid <= req->rq_export->exp_last_xid)) {
643 DEBUG_REQ(D_ERROR, req, "Unexpected xid %llx vs. "
644 "last_xid %llx\n", req->rq_xid,
645 req->rq_export->exp_last_xid);
646 /* Some request is allowed to be sent during replay,
647 * such as OUT update requests, FLD requests, so it
648 * is possible that replay requests has smaller XID
649 * than the exp_last_xid.
651 * Some non-replay requests may have smaller XID as
654 * - Client send a no_resend RPC, like statfs;
655 * - The RPC timedout (or some other error) on client,
656 * then it's removed from the unreplied list;
657 * - Client send some other request to bump the
658 * exp_last_xid on server;
659 * - The former RPC got chance to be processed;
661 if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY))
665 /* The "last_xid" is the minimum xid among unreplied requests,
666 * if the request is from the previous connection, its xid can
667 * still be larger than "exp_last_xid", then the above check of
668 * xid is not enough to determine whether the request is delayed.
670 * For example, if some replay request was delayed and caused
671 * timeout at client and the replay is restarted, the delayed
672 * replay request will have the larger xid than "exp_last_xid"
674 if (req->rq_export->exp_conn_cnt >
675 lustre_msg_get_conn_cnt(req->rq_reqmsg))
678 /* try to release in-memory reply data */
679 if (tgt_is_multimodrpcs_client(req->rq_export)) {
680 tgt_handle_received_xid(req->rq_export,
681 lustre_msg_get_last_xid(req->rq_reqmsg));
682 if (!(lustre_msg_get_flags(req->rq_reqmsg) &
683 (MSG_RESENT | MSG_REPLAY)))
684 tgt_handle_tag(req->rq_export,
685 lustre_msg_get_tag(req->rq_reqmsg));
690 int tgt_request_handle(struct ptlrpc_request *req)
692 struct tgt_session_info *tsi = tgt_ses_info(req->rq_svc_thread->t_env);
694 struct lustre_msg *msg = req->rq_reqmsg;
695 struct tgt_handler *h;
696 struct lu_target *tgt;
697 int request_fail_id = 0;
698 __u32 opc = lustre_msg_get_opc(msg);
699 struct obd_device *obd;
701 bool is_connect = false;
704 if (unlikely(OBD_FAIL_CHECK(OBD_FAIL_TGT_RECOVERY_REQ_RACE))) {
705 if (cfs_fail_val == 0 &&
706 lustre_msg_get_opc(msg) != OBD_PING &&
707 lustre_msg_get_flags(msg) & MSG_REQ_REPLAY_DONE) {
708 struct l_wait_info lwi = { 0 };
712 l_wait_event(cfs_race_waitq, (cfs_race_state == 1),
717 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
718 tsi->tsi_pill = &req->rq_pill;
719 tsi->tsi_env = req->rq_svc_thread->t_env;
721 /* if request has export then get handlers slice from corresponding
722 * target, otherwise that should be connect operation */
723 if (opc == MDS_CONNECT || opc == OST_CONNECT ||
724 opc == MGS_CONNECT) {
726 req_capsule_set(&req->rq_pill, &RQF_CONNECT);
727 rc = target_handle_connect(req);
729 rc = ptlrpc_error(req);
732 /* recovery-small test 18c asks to drop connect reply */
733 if (unlikely(opc == OST_CONNECT &&
734 OBD_FAIL_CHECK(OBD_FAIL_OST_CONNECT_NET2)))
738 if (unlikely(!class_connected_export(req->rq_export))) {
739 if (opc == SEC_CTX_INIT || opc == SEC_CTX_INIT_CONT ||
740 opc == SEC_CTX_FINI) {
741 /* sec context initialization has to be handled
742 * by hand in tgt_handle_request0() */
743 tsi->tsi_reply_fail_id = OBD_FAIL_SEC_CTX_INIT_NET;
745 GOTO(handle_recov, rc = 0);
747 CDEBUG(D_HA, "operation %d on unconnected OST from %s\n",
748 opc, libcfs_id2str(req->rq_peer));
749 req->rq_status = -ENOTCONN;
750 rc = ptlrpc_error(req);
754 tsi->tsi_tgt = tgt = class_exp2tgt(req->rq_export);
755 tsi->tsi_exp = req->rq_export;
756 if (exp_connect_flags(req->rq_export) & OBD_CONNECT_JOBSTATS)
757 tsi->tsi_jobid = lustre_msg_get_jobid(req->rq_reqmsg);
759 tsi->tsi_jobid = NULL;
762 DEBUG_REQ(D_ERROR, req, "%s: No target for connected export\n",
763 class_exp2obd(req->rq_export)->obd_name);
764 req->rq_status = -EINVAL;
765 rc = ptlrpc_error(req);
769 /* Skip last_xid processing for the recovery thread, otherwise, the
770 * last_xid on same request could be processed twice: first time when
771 * processing the incoming request, second time when the request is
772 * being processed by recovery thread. */
773 obd = class_exp2obd(req->rq_export);
775 /* reset the exp_last_xid on each connection. */
776 req->rq_export->exp_last_xid = 0;
777 } else if (obd->obd_recovery_data.trd_processing_task !=
779 rc = process_req_last_xid(req);
782 rc = ptlrpc_error(req);
787 request_fail_id = tgt->lut_request_fail_id;
788 tsi->tsi_reply_fail_id = tgt->lut_reply_fail_id;
790 h = tgt_handler_find_check(req);
792 req->rq_status = PTR_ERR(h);
793 rc = ptlrpc_error(req);
797 LASSERTF(h->th_opc == opc, "opcode mismatch %d != %d\n",
800 if (CFS_FAIL_CHECK_ORSET(request_fail_id, CFS_FAIL_ONCE))
803 rc = lustre_msg_check_version(msg, h->th_version);
805 DEBUG_REQ(D_ERROR, req, "%s: drop mal-formed request, version"
806 " %08x, expecting %08x\n", tgt_name(tgt),
807 lustre_msg_get_version(msg), h->th_version);
808 req->rq_status = -EINVAL;
809 rc = ptlrpc_error(req);
814 rc = tgt_handle_recovery(req, tsi->tsi_reply_fail_id);
815 if (likely(rc == 1)) {
816 rc = tgt_handle_request0(tsi, h, req);
822 req_capsule_fini(tsi->tsi_pill);
823 if (tsi->tsi_corpus != NULL) {
824 lu_object_put(tsi->tsi_env, tsi->tsi_corpus);
825 tsi->tsi_corpus = NULL;
829 EXPORT_SYMBOL(tgt_request_handle);
831 /** Assign high priority operations to the request if needed. */
832 int tgt_hpreq_handler(struct ptlrpc_request *req)
834 struct tgt_session_info *tsi = tgt_ses_info(req->rq_svc_thread->t_env);
835 struct tgt_handler *h;
840 if (req->rq_export == NULL)
843 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
844 tsi->tsi_pill = &req->rq_pill;
845 tsi->tsi_env = req->rq_svc_thread->t_env;
846 tsi->tsi_tgt = class_exp2tgt(req->rq_export);
847 tsi->tsi_exp = req->rq_export;
849 h = tgt_handler_find_check(req);
855 rc = tgt_request_preprocess(tsi, h, req);
856 if (unlikely(rc != 0))
859 if (h->th_hp != NULL)
863 EXPORT_SYMBOL(tgt_hpreq_handler);
865 void tgt_counter_incr(struct obd_export *exp, int opcode)
867 lprocfs_counter_incr(exp->exp_obd->obd_stats, opcode);
868 if (exp->exp_nid_stats && exp->exp_nid_stats->nid_stats != NULL)
869 lprocfs_counter_incr(exp->exp_nid_stats->nid_stats, opcode);
871 EXPORT_SYMBOL(tgt_counter_incr);
874 * Unified target generic handlers.
877 int tgt_connect_check_sptlrpc(struct ptlrpc_request *req, struct obd_export *exp)
879 struct lu_target *tgt = class_exp2tgt(exp);
880 struct sptlrpc_flavor flvr;
884 LASSERT(tgt->lut_obd);
885 LASSERT(tgt->lut_slice);
887 /* always allow ECHO client */
888 if (unlikely(strcmp(exp->exp_obd->obd_type->typ_name,
889 LUSTRE_ECHO_NAME) == 0)) {
890 exp->exp_flvr.sf_rpc = SPTLRPC_FLVR_ANY;
894 if (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
895 read_lock(&tgt->lut_sptlrpc_lock);
896 sptlrpc_target_choose_flavor(&tgt->lut_sptlrpc_rset,
900 read_unlock(&tgt->lut_sptlrpc_lock);
902 spin_lock(&exp->exp_lock);
903 exp->exp_sp_peer = req->rq_sp_from;
904 exp->exp_flvr = flvr;
906 /* when on mgs, if no restriction is set, or if client
907 * is loopback, allow any flavor */
908 if ((strcmp(exp->exp_obd->obd_type->typ_name,
909 LUSTRE_MGS_NAME) == 0) &&
910 (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_NULL ||
911 LNET_NETTYP(LNET_NIDNET(exp->exp_connection->c_peer.nid))
913 exp->exp_flvr.sf_rpc = SPTLRPC_FLVR_ANY;
915 if (exp->exp_flvr.sf_rpc != SPTLRPC_FLVR_ANY &&
916 exp->exp_flvr.sf_rpc != req->rq_flvr.sf_rpc) {
917 CERROR("%s: unauthorized rpc flavor %x from %s, "
918 "expect %x\n", tgt_name(tgt),
920 libcfs_nid2str(req->rq_peer.nid),
921 exp->exp_flvr.sf_rpc);
924 spin_unlock(&exp->exp_lock);
926 if (exp->exp_sp_peer != req->rq_sp_from) {
927 CERROR("%s: RPC source %s doesn't match %s\n",
929 sptlrpc_part2name(req->rq_sp_from),
930 sptlrpc_part2name(exp->exp_sp_peer));
933 rc = sptlrpc_target_export_check(exp, req);
940 int tgt_adapt_sptlrpc_conf(struct lu_target *tgt)
942 struct sptlrpc_rule_set tmp_rset;
945 if (unlikely(tgt == NULL)) {
946 CERROR("No target passed");
950 sptlrpc_rule_set_init(&tmp_rset);
951 rc = sptlrpc_conf_target_get_rules(tgt->lut_obd, &tmp_rset);
953 CERROR("%s: failed get sptlrpc rules: rc = %d\n",
958 sptlrpc_target_update_exp_flavor(tgt->lut_obd, &tmp_rset);
960 write_lock(&tgt->lut_sptlrpc_lock);
961 sptlrpc_rule_set_free(&tgt->lut_sptlrpc_rset);
962 tgt->lut_sptlrpc_rset = tmp_rset;
963 write_unlock(&tgt->lut_sptlrpc_lock);
967 EXPORT_SYMBOL(tgt_adapt_sptlrpc_conf);
969 int tgt_connect(struct tgt_session_info *tsi)
971 struct ptlrpc_request *req = tgt_ses_req(tsi);
972 struct obd_connect_data *reply;
977 /* XXX: better to call this check right after getting new export but
978 * before last_rcvd slot allocation to avoid server load upon insecure
979 * connects. This is to be fixed after unifiyng all targets.
981 rc = tgt_connect_check_sptlrpc(req, tsi->tsi_exp);
985 /* To avoid exposing partially initialized connection flags, changes up
986 * to this point have been staged in reply->ocd_connect_flags. Now that
987 * connection handling has completed successfully, atomically update
988 * the connect flags in the shared export data structure. LU-1623 */
989 reply = req_capsule_server_get(tsi->tsi_pill, &RMF_CONNECT_DATA);
990 spin_lock(&tsi->tsi_exp->exp_lock);
991 *exp_connect_flags_ptr(tsi->tsi_exp) = reply->ocd_connect_flags;
992 if (reply->ocd_connect_flags & OBD_CONNECT_FLAGS2)
993 *exp_connect_flags2_ptr(tsi->tsi_exp) =
994 reply->ocd_connect_flags2;
995 tsi->tsi_exp->exp_connect_data.ocd_brw_size = reply->ocd_brw_size;
996 spin_unlock(&tsi->tsi_exp->exp_lock);
998 if (strcmp(tsi->tsi_exp->exp_obd->obd_type->typ_name,
999 LUSTRE_MDT_NAME) == 0) {
1000 rc = req_check_sepol(tsi->tsi_pill);
1007 obd_disconnect(class_export_get(tsi->tsi_exp));
1010 EXPORT_SYMBOL(tgt_connect);
1012 int tgt_disconnect(struct tgt_session_info *tsi)
1018 OBD_FAIL_TIMEOUT(OBD_FAIL_OST_DISCONNECT_DELAY, cfs_fail_val);
1020 rc = target_handle_disconnect(tgt_ses_req(tsi));
1022 RETURN(err_serious(rc));
1026 EXPORT_SYMBOL(tgt_disconnect);
1029 * Unified target OBD handlers
1031 int tgt_obd_ping(struct tgt_session_info *tsi)
1037 /* The target-specific part of OBD_PING request handling.
1038 * It controls Filter Modification Data (FMD) expiration each time
1041 * Valid only for replayable targets, e.g. MDT and OFD
1043 if (tsi->tsi_exp->exp_obd->obd_replayable)
1044 tgt_fmd_expire(tsi->tsi_exp);
1046 rc = req_capsule_server_pack(tsi->tsi_pill);
1048 RETURN(err_serious(rc));
1052 EXPORT_SYMBOL(tgt_obd_ping);
1054 int tgt_obd_log_cancel(struct tgt_session_info *tsi)
1056 return err_serious(-EOPNOTSUPP);
1059 int tgt_send_buffer(struct tgt_session_info *tsi, struct lu_rdbuf *rdbuf)
1061 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
1062 struct ptlrpc_request *req = tgt_ses_req(tsi);
1063 struct obd_export *exp = req->rq_export;
1064 struct ptlrpc_bulk_desc *desc;
1065 struct l_wait_info *lwi = &tti->tti_u.update.tti_wait_info;
1071 desc = ptlrpc_prep_bulk_exp(req, rdbuf->rb_nbufs, 1,
1072 PTLRPC_BULK_PUT_SOURCE | PTLRPC_BULK_BUF_KVEC,
1073 MDS_BULK_PORTAL, &ptlrpc_bulk_kvec_ops);
1077 for (i = 0; i < rdbuf->rb_nbufs; i++)
1078 desc->bd_frag_ops->add_iov_frag(desc,
1079 rdbuf->rb_bufs[i].lb_buf,
1080 rdbuf->rb_bufs[i].lb_len);
1082 rc = target_bulk_io(exp, desc, lwi);
1083 ptlrpc_free_bulk(desc);
1086 EXPORT_SYMBOL(tgt_send_buffer);
1088 int tgt_sendpage(struct tgt_session_info *tsi, struct lu_rdpg *rdpg, int nob)
1090 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
1091 struct ptlrpc_request *req = tgt_ses_req(tsi);
1092 struct obd_export *exp = req->rq_export;
1093 struct ptlrpc_bulk_desc *desc;
1094 struct l_wait_info *lwi = &tti->tti_u.rdpg.tti_wait_info;
1102 desc = ptlrpc_prep_bulk_exp(req, rdpg->rp_npages, 1,
1103 PTLRPC_BULK_PUT_SOURCE |
1104 PTLRPC_BULK_BUF_KIOV,
1106 &ptlrpc_bulk_kiov_pin_ops);
1110 if (!(exp_connect_flags(exp) & OBD_CONNECT_BRW_SIZE))
1111 /* old client requires reply size in it's PAGE_SIZE,
1112 * which is rdpg->rp_count */
1113 nob = rdpg->rp_count;
1115 for (i = 0, tmpcount = nob; i < rdpg->rp_npages && tmpcount > 0;
1116 i++, tmpcount -= tmpsize) {
1117 tmpsize = min_t(int, tmpcount, PAGE_SIZE);
1118 desc->bd_frag_ops->add_kiov_frag(desc, rdpg->rp_pages[i], 0,
1122 LASSERT(desc->bd_nob == nob);
1123 rc = target_bulk_io(exp, desc, lwi);
1124 ptlrpc_free_bulk(desc);
1127 EXPORT_SYMBOL(tgt_sendpage);
1130 * OBD_IDX_READ handler
1132 static int tgt_obd_idx_read(struct tgt_session_info *tsi)
1134 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
1135 struct lu_rdpg *rdpg = &tti->tti_u.rdpg.tti_rdpg;
1136 struct idx_info *req_ii, *rep_ii;
1141 memset(rdpg, 0, sizeof(*rdpg));
1142 req_capsule_set(tsi->tsi_pill, &RQF_OBD_IDX_READ);
1144 /* extract idx_info buffer from request & reply */
1145 req_ii = req_capsule_client_get(tsi->tsi_pill, &RMF_IDX_INFO);
1146 if (req_ii == NULL || req_ii->ii_magic != IDX_INFO_MAGIC)
1147 RETURN(err_serious(-EPROTO));
1149 rc = req_capsule_server_pack(tsi->tsi_pill);
1151 RETURN(err_serious(rc));
1153 rep_ii = req_capsule_server_get(tsi->tsi_pill, &RMF_IDX_INFO);
1155 RETURN(err_serious(-EFAULT));
1156 rep_ii->ii_magic = IDX_INFO_MAGIC;
1158 /* extract hash to start with */
1159 rdpg->rp_hash = req_ii->ii_hash_start;
1161 /* extract requested attributes */
1162 rdpg->rp_attrs = req_ii->ii_attrs;
1164 /* check that fid packed in request is valid and supported */
1165 if (!fid_is_sane(&req_ii->ii_fid))
1167 rep_ii->ii_fid = req_ii->ii_fid;
1170 rep_ii->ii_flags = req_ii->ii_flags;
1172 /* compute number of pages to allocate, ii_count is the number of 4KB
1174 if (req_ii->ii_count <= 0)
1175 GOTO(out, rc = -EFAULT);
1176 rdpg->rp_count = min_t(unsigned int, req_ii->ii_count << LU_PAGE_SHIFT,
1177 exp_max_brw_size(tsi->tsi_exp));
1178 rdpg->rp_npages = (rdpg->rp_count + PAGE_SIZE - 1) >> PAGE_SHIFT;
1180 /* allocate pages to store the containers */
1181 OBD_ALLOC(rdpg->rp_pages, rdpg->rp_npages * sizeof(rdpg->rp_pages[0]));
1182 if (rdpg->rp_pages == NULL)
1183 GOTO(out, rc = -ENOMEM);
1184 for (i = 0; i < rdpg->rp_npages; i++) {
1185 rdpg->rp_pages[i] = alloc_page(GFP_NOFS);
1186 if (rdpg->rp_pages[i] == NULL)
1187 GOTO(out, rc = -ENOMEM);
1190 /* populate pages with key/record pairs */
1191 rc = dt_index_read(tsi->tsi_env, tsi->tsi_tgt->lut_bottom, rep_ii, rdpg);
1195 LASSERTF(rc <= rdpg->rp_count, "dt_index_read() returned more than "
1196 "asked %d > %d\n", rc, rdpg->rp_count);
1198 /* send pages to client */
1199 rc = tgt_sendpage(tsi, rdpg, rc);
1204 if (rdpg->rp_pages) {
1205 for (i = 0; i < rdpg->rp_npages; i++)
1206 if (rdpg->rp_pages[i])
1207 __free_page(rdpg->rp_pages[i]);
1208 OBD_FREE(rdpg->rp_pages,
1209 rdpg->rp_npages * sizeof(rdpg->rp_pages[0]));
1214 struct tgt_handler tgt_obd_handlers[] = {
1215 TGT_OBD_HDL (0, OBD_PING, tgt_obd_ping),
1216 TGT_OBD_HDL (0, OBD_IDX_READ, tgt_obd_idx_read)
1218 EXPORT_SYMBOL(tgt_obd_handlers);
1220 int tgt_sync(const struct lu_env *env, struct lu_target *tgt,
1221 struct dt_object *obj, __u64 start, __u64 end)
1227 /* if no objid is specified, it means "sync whole filesystem" */
1229 rc = dt_sync(env, tgt->lut_bottom);
1230 } else if (dt_version_get(env, obj) >
1231 tgt->lut_obd->obd_last_committed) {
1232 rc = dt_object_sync(env, obj, start, end);
1234 atomic_inc(&tgt->lut_sync_count);
1238 EXPORT_SYMBOL(tgt_sync);
1240 * Unified target DLM handlers.
1244 * Unified target BAST
1246 * Ensure data and metadata are synced to disk when lock is canceled if Sync on
1247 * Cancel (SOC) is enabled. If it's extent lock, normally sync obj is enough,
1248 * but if it's cross-MDT lock, because remote object version is not set, a
1249 * filesystem sync is needed.
1251 * \param lock server side lock
1252 * \param desc lock desc
1253 * \param data ldlm_cb_set_arg
1254 * \param flag indicates whether this cancelling or blocking callback
1255 * \retval 0 on success
1256 * \retval negative number on error
1258 static int tgt_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
1259 void *data, int flag)
1262 struct lu_target *tgt;
1263 struct dt_object *obj = NULL;
1269 tgt = class_exp2tgt(lock->l_export);
1271 if (unlikely(tgt == NULL)) {
1272 CDEBUG(D_ERROR, "%s: No target for connected export\n",
1273 class_exp2obd(lock->l_export)->obd_name);
1277 if (flag == LDLM_CB_CANCELING &&
1278 (lock->l_granted_mode & (LCK_EX | LCK_PW | LCK_GROUP)) &&
1279 (tgt->lut_sync_lock_cancel == SYNC_LOCK_CANCEL_ALWAYS ||
1280 (tgt->lut_sync_lock_cancel == SYNC_LOCK_CANCEL_BLOCKING &&
1281 ldlm_is_cbpending(lock))) &&
1282 ((exp_connect_flags(lock->l_export) & OBD_CONNECT_MDS_MDS) ||
1283 lock->l_resource->lr_type == LDLM_EXTENT)) {
1285 __u64 end = OBD_OBJECT_EOF;
1287 rc = lu_env_init(&env, LCT_DT_THREAD);
1288 if (unlikely(rc != 0))
1291 ost_fid_from_resid(&fid, &lock->l_resource->lr_name,
1292 tgt->lut_lsd.lsd_osd_index);
1294 if (lock->l_resource->lr_type == LDLM_EXTENT) {
1295 obj = dt_locate(&env, tgt->lut_bottom, &fid);
1297 GOTO(err_env, rc = PTR_ERR(obj));
1299 if (!dt_object_exists(obj))
1300 GOTO(err_put, rc = -ENOENT);
1302 start = lock->l_policy_data.l_extent.start;
1303 end = lock->l_policy_data.l_extent.end;
1306 rc = tgt_sync(&env, tgt, obj, start, end);
1308 CERROR("%s: syncing "DFID" (%llu-%llu) on lock "
1309 "cancel: rc = %d\n",
1310 tgt_name(tgt), PFID(&fid),
1311 lock->l_policy_data.l_extent.start,
1312 lock->l_policy_data.l_extent.end, rc);
1316 dt_object_put(&env, obj);
1321 rc = ldlm_server_blocking_ast(lock, desc, data, flag);
1325 static struct ldlm_callback_suite tgt_dlm_cbs = {
1326 .lcs_completion = ldlm_server_completion_ast,
1327 .lcs_blocking = tgt_blocking_ast,
1328 .lcs_glimpse = ldlm_server_glimpse_ast
1331 int tgt_enqueue(struct tgt_session_info *tsi)
1333 struct ptlrpc_request *req = tgt_ses_req(tsi);
1338 * tsi->tsi_dlm_req was already swapped and (if necessary) converted,
1339 * tsi->tsi_dlm_cbs was set by the *_req_handle() function.
1341 LASSERT(tsi->tsi_dlm_req != NULL);
1342 rc = ldlm_handle_enqueue0(tsi->tsi_exp->exp_obd->obd_namespace, req,
1343 tsi->tsi_dlm_req, &tgt_dlm_cbs);
1345 RETURN(err_serious(rc));
1347 switch (LUT_FAIL_CLASS(tsi->tsi_reply_fail_id)) {
1349 tsi->tsi_reply_fail_id = OBD_FAIL_MDS_LDLM_REPLY_NET;
1352 tsi->tsi_reply_fail_id = OBD_FAIL_OST_LDLM_REPLY_NET;
1355 tsi->tsi_reply_fail_id = OBD_FAIL_MGS_LDLM_REPLY_NET;
1358 tsi->tsi_reply_fail_id = OBD_FAIL_LDLM_REPLY;
1361 RETURN(req->rq_status);
1363 EXPORT_SYMBOL(tgt_enqueue);
1365 int tgt_convert(struct tgt_session_info *tsi)
1367 struct ptlrpc_request *req = tgt_ses_req(tsi);
1371 LASSERT(tsi->tsi_dlm_req);
1372 rc = ldlm_handle_convert0(req, tsi->tsi_dlm_req);
1374 RETURN(err_serious(rc));
1376 RETURN(req->rq_status);
1379 int tgt_bl_callback(struct tgt_session_info *tsi)
1381 return err_serious(-EOPNOTSUPP);
1384 int tgt_cp_callback(struct tgt_session_info *tsi)
1386 return err_serious(-EOPNOTSUPP);
1389 /* generic LDLM target handler */
1390 struct tgt_handler tgt_dlm_handlers[] = {
1391 TGT_DLM_HDL (HABEO_CLAVIS, LDLM_ENQUEUE, tgt_enqueue),
1392 TGT_DLM_HDL (HABEO_CLAVIS, LDLM_CONVERT, tgt_convert),
1393 TGT_DLM_HDL_VAR(0, LDLM_BL_CALLBACK, tgt_bl_callback),
1394 TGT_DLM_HDL_VAR(0, LDLM_CP_CALLBACK, tgt_cp_callback)
1396 EXPORT_SYMBOL(tgt_dlm_handlers);
1399 * Unified target LLOG handlers.
1401 int tgt_llog_open(struct tgt_session_info *tsi)
1407 rc = llog_origin_handle_open(tgt_ses_req(tsi));
1411 EXPORT_SYMBOL(tgt_llog_open);
1413 int tgt_llog_read_header(struct tgt_session_info *tsi)
1419 rc = llog_origin_handle_read_header(tgt_ses_req(tsi));
1423 EXPORT_SYMBOL(tgt_llog_read_header);
1425 int tgt_llog_next_block(struct tgt_session_info *tsi)
1431 rc = llog_origin_handle_next_block(tgt_ses_req(tsi));
1435 EXPORT_SYMBOL(tgt_llog_next_block);
1437 int tgt_llog_prev_block(struct tgt_session_info *tsi)
1443 rc = llog_origin_handle_prev_block(tgt_ses_req(tsi));
1447 EXPORT_SYMBOL(tgt_llog_prev_block);
1449 /* generic llog target handler */
1450 struct tgt_handler tgt_llog_handlers[] = {
1451 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_CREATE, tgt_llog_open),
1452 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_NEXT_BLOCK, tgt_llog_next_block),
1453 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_READ_HEADER, tgt_llog_read_header),
1454 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_PREV_BLOCK, tgt_llog_prev_block),
1456 EXPORT_SYMBOL(tgt_llog_handlers);
1459 * sec context handlers
1461 /* XXX: Implement based on mdt_sec_ctx_handle()? */
1462 static int tgt_sec_ctx_handle(struct tgt_session_info *tsi)
1467 struct tgt_handler tgt_sec_ctx_handlers[] = {
1468 TGT_SEC_HDL_VAR(0, SEC_CTX_INIT, tgt_sec_ctx_handle),
1469 TGT_SEC_HDL_VAR(0, SEC_CTX_INIT_CONT, tgt_sec_ctx_handle),
1470 TGT_SEC_HDL_VAR(0, SEC_CTX_FINI, tgt_sec_ctx_handle),
1472 EXPORT_SYMBOL(tgt_sec_ctx_handlers);
1474 int (*tgt_lfsck_in_notify_local)(const struct lu_env *env,
1475 struct dt_device *key,
1476 struct lfsck_req_local *lrl,
1477 struct thandle *th) = NULL;
1479 void tgt_register_lfsck_in_notify_local(int (*notify)(const struct lu_env *,
1481 struct lfsck_req_local *,
1484 tgt_lfsck_in_notify_local = notify;
1486 EXPORT_SYMBOL(tgt_register_lfsck_in_notify_local);
1488 int (*tgt_lfsck_in_notify)(const struct lu_env *env,
1489 struct dt_device *key,
1490 struct lfsck_request *lr) = NULL;
1492 void tgt_register_lfsck_in_notify(int (*notify)(const struct lu_env *,
1494 struct lfsck_request *))
1496 tgt_lfsck_in_notify = notify;
1498 EXPORT_SYMBOL(tgt_register_lfsck_in_notify);
1500 static int (*tgt_lfsck_query)(const struct lu_env *env,
1501 struct dt_device *key,
1502 struct lfsck_request *req,
1503 struct lfsck_reply *rep,
1504 struct lfsck_query *que) = NULL;
1506 void tgt_register_lfsck_query(int (*query)(const struct lu_env *,
1508 struct lfsck_request *,
1509 struct lfsck_reply *,
1510 struct lfsck_query *))
1512 tgt_lfsck_query = query;
1514 EXPORT_SYMBOL(tgt_register_lfsck_query);
1516 /* LFSCK request handlers */
1517 static int tgt_handle_lfsck_notify(struct tgt_session_info *tsi)
1519 const struct lu_env *env = tsi->tsi_env;
1520 struct dt_device *key = tsi->tsi_tgt->lut_bottom;
1521 struct lfsck_request *lr;
1525 lr = req_capsule_client_get(tsi->tsi_pill, &RMF_LFSCK_REQUEST);
1529 rc = tgt_lfsck_in_notify(env, key, lr);
1534 static int tgt_handle_lfsck_query(struct tgt_session_info *tsi)
1536 struct lfsck_request *request;
1537 struct lfsck_reply *reply;
1541 request = req_capsule_client_get(tsi->tsi_pill, &RMF_LFSCK_REQUEST);
1542 if (request == NULL)
1545 reply = req_capsule_server_get(tsi->tsi_pill, &RMF_LFSCK_REPLY);
1549 rc = tgt_lfsck_query(tsi->tsi_env, tsi->tsi_tgt->lut_bottom,
1550 request, reply, NULL);
1552 RETURN(rc < 0 ? rc : 0);
1555 struct tgt_handler tgt_lfsck_handlers[] = {
1556 TGT_LFSCK_HDL(HABEO_REFERO, LFSCK_NOTIFY, tgt_handle_lfsck_notify),
1557 TGT_LFSCK_HDL(HABEO_REFERO, LFSCK_QUERY, tgt_handle_lfsck_query),
1559 EXPORT_SYMBOL(tgt_lfsck_handlers);
1562 * initialize per-thread page pool (bug 5137).
1564 int tgt_io_thread_init(struct ptlrpc_thread *thread)
1566 struct tgt_thread_big_cache *tbc;
1570 LASSERT(thread != NULL);
1571 LASSERT(thread->t_data == NULL);
1573 OBD_ALLOC_LARGE(tbc, sizeof(*tbc));
1576 thread->t_data = tbc;
1579 EXPORT_SYMBOL(tgt_io_thread_init);
1582 * free per-thread pool created by tgt_thread_init().
1584 void tgt_io_thread_done(struct ptlrpc_thread *thread)
1586 struct tgt_thread_big_cache *tbc;
1590 LASSERT(thread != NULL);
1593 * be prepared to handle partially-initialized pools (because this is
1594 * called from ost_io_thread_init() for cleanup.
1596 tbc = thread->t_data;
1598 OBD_FREE_LARGE(tbc, sizeof(*tbc));
1599 thread->t_data = NULL;
1603 EXPORT_SYMBOL(tgt_io_thread_done);
1606 * Helper function for getting Data-on-MDT file server DLM lock
1607 * if asked by client.
1609 int tgt_mdt_data_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
1610 struct lustre_handle *lh, int mode, __u64 *flags)
1612 union ldlm_policy_data policy = {
1613 .l_inodebits.bits = MDS_INODELOCK_DOM,
1619 LASSERT(lh != NULL);
1620 LASSERT(ns != NULL);
1621 LASSERT(!lustre_handle_is_used(lh));
1623 rc = ldlm_cli_enqueue_local(NULL, ns, res_id, LDLM_IBITS, &policy, mode,
1624 flags, ldlm_blocking_ast,
1625 ldlm_completion_ast, ldlm_glimpse_ast,
1626 NULL, 0, LVB_T_NONE, NULL, lh);
1628 RETURN(rc == ELDLM_OK ? 0 : -EIO);
1630 EXPORT_SYMBOL(tgt_mdt_data_lock);
1632 void tgt_mdt_data_unlock(struct lustre_handle *lh, enum ldlm_mode mode)
1634 LASSERT(lustre_handle_is_used(lh));
1635 ldlm_lock_decref(lh, mode);
1637 EXPORT_SYMBOL(tgt_mdt_data_unlock);
1640 * Helper function for getting server side [start, start+count] DLM lock
1641 * if asked by client.
1643 int tgt_extent_lock(const struct lu_env *env, struct ldlm_namespace *ns,
1644 struct ldlm_res_id *res_id, __u64 start, __u64 end,
1645 struct lustre_handle *lh, int mode, __u64 *flags)
1647 union ldlm_policy_data policy;
1652 LASSERT(lh != NULL);
1653 LASSERT(ns != NULL);
1654 LASSERT(!lustre_handle_is_used(lh));
1656 policy.l_extent.gid = 0;
1657 policy.l_extent.start = start & PAGE_MASK;
1660 * If ->o_blocks is EOF it means "lock till the end of the file".
1661 * Otherwise, it's size of an extent or hole being punched (in bytes).
1663 if (end == OBD_OBJECT_EOF || end < start)
1664 policy.l_extent.end = OBD_OBJECT_EOF;
1666 policy.l_extent.end = end | ~PAGE_MASK;
1668 rc = ldlm_cli_enqueue_local(env, ns, res_id, LDLM_EXTENT, &policy,
1669 mode, flags, ldlm_blocking_ast,
1670 ldlm_completion_ast, ldlm_glimpse_ast,
1671 NULL, 0, LVB_T_NONE, NULL, lh);
1672 RETURN(rc == ELDLM_OK ? 0 : -EIO);
1674 EXPORT_SYMBOL(tgt_extent_lock);
1676 void tgt_extent_unlock(struct lustre_handle *lh, enum ldlm_mode mode)
1678 LASSERT(lustre_handle_is_used(lh));
1679 ldlm_lock_decref(lh, mode);
1681 EXPORT_SYMBOL(tgt_extent_unlock);
1683 static int tgt_brw_lock(const struct lu_env *env, struct obd_export *exp,
1684 struct ldlm_res_id *res_id, struct obd_ioobj *obj,
1685 struct niobuf_remote *nb, struct lustre_handle *lh,
1686 enum ldlm_mode mode)
1688 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
1690 int nrbufs = obj->ioo_bufcnt;
1696 LASSERT(mode == LCK_PR || mode == LCK_PW);
1697 LASSERT(!lustre_handle_is_used(lh));
1699 if (ns->ns_obd->obd_recovering)
1702 if (nrbufs == 0 || !(nb[0].rnb_flags & OBD_BRW_SRVLOCK))
1705 for (i = 1; i < nrbufs; i++)
1706 if (!(nb[i].rnb_flags & OBD_BRW_SRVLOCK))
1709 /* MDT IO for data-on-mdt */
1710 if (exp->exp_connect_data.ocd_connect_flags & OBD_CONNECT_IBITS)
1711 rc = tgt_mdt_data_lock(ns, res_id, lh, mode, &flags);
1713 rc = tgt_extent_lock(env, ns, res_id, nb[0].rnb_offset,
1714 nb[nrbufs - 1].rnb_offset +
1715 nb[nrbufs - 1].rnb_len - 1,
1720 static void tgt_brw_unlock(struct obd_ioobj *obj, struct niobuf_remote *niob,
1721 struct lustre_handle *lh, enum ldlm_mode mode)
1725 LASSERT(mode == LCK_PR || mode == LCK_PW);
1726 LASSERT((obj->ioo_bufcnt > 0 &&
1727 (niob[0].rnb_flags & OBD_BRW_SRVLOCK)) ==
1728 lustre_handle_is_used(lh));
1730 if (lustre_handle_is_used(lh))
1731 tgt_extent_unlock(lh, mode);
1734 static int tgt_checksum_niobuf(struct lu_target *tgt,
1735 struct niobuf_local *local_nb, int npages,
1736 int opc, enum cksum_types cksum_type,
1739 struct ahash_request *req;
1740 unsigned int bufsize;
1742 unsigned char cfs_alg = cksum_obd2cfs(cksum_type);
1744 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1746 CERROR("%s: unable to initialize checksum hash %s\n",
1747 tgt_name(tgt), cfs_crypto_hash_name(cfs_alg));
1748 return PTR_ERR(req);
1751 CDEBUG(D_INFO, "Checksum for algo %s\n", cfs_crypto_hash_name(cfs_alg));
1752 for (i = 0; i < npages; i++) {
1753 /* corrupt the data before we compute the checksum, to
1754 * simulate a client->OST data error */
1755 if (i == 0 && opc == OST_WRITE &&
1756 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) {
1757 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
1758 int len = local_nb[i].lnb_len;
1759 struct page *np = tgt_page_to_corrupt;
1762 char *ptr = ll_kmap_atomic(local_nb[i].lnb_page,
1764 char *ptr2 = page_address(np);
1766 memcpy(ptr2 + off, ptr + off, len);
1767 memcpy(ptr2 + off, "bad3", min(4, len));
1768 ll_kunmap_atomic(ptr, KM_USER0);
1770 /* LU-8376 to preserve original index for
1771 * display in dump_all_bulk_pages() */
1774 cfs_crypto_hash_update_page(req, np, off,
1778 CERROR("%s: can't alloc page for corruption\n",
1782 cfs_crypto_hash_update_page(req, local_nb[i].lnb_page,
1783 local_nb[i].lnb_page_offset & ~PAGE_MASK,
1784 local_nb[i].lnb_len);
1786 /* corrupt the data after we compute the checksum, to
1787 * simulate an OST->client data error */
1788 if (i == 0 && opc == OST_READ &&
1789 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND)) {
1790 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
1791 int len = local_nb[i].lnb_len;
1792 struct page *np = tgt_page_to_corrupt;
1795 char *ptr = ll_kmap_atomic(local_nb[i].lnb_page,
1797 char *ptr2 = page_address(np);
1799 memcpy(ptr2 + off, ptr + off, len);
1800 memcpy(ptr2 + off, "bad4", min(4, len));
1801 ll_kunmap_atomic(ptr, KM_USER0);
1803 /* LU-8376 to preserve original index for
1804 * display in dump_all_bulk_pages() */
1807 cfs_crypto_hash_update_page(req, np, off,
1811 CERROR("%s: can't alloc page for corruption\n",
1817 bufsize = sizeof(*cksum);
1818 err = cfs_crypto_hash_final(req, (unsigned char *)cksum, &bufsize);
1823 char dbgcksum_file_name[PATH_MAX];
1825 static void dump_all_bulk_pages(struct obdo *oa, int count,
1826 struct niobuf_local *local_nb,
1827 __u32 server_cksum, __u32 client_cksum)
1834 /* will only keep dump of pages on first error for the same range in
1835 * file/fid, not during the resends/retries. */
1836 snprintf(dbgcksum_file_name, sizeof(dbgcksum_file_name),
1837 "%s-checksum_dump-ost-"DFID":[%llu-%llu]-%x-%x",
1838 (strncmp(libcfs_debug_file_path_arr, "NONE", 4) != 0 ?
1839 libcfs_debug_file_path_arr :
1840 LIBCFS_DEBUG_FILE_PATH_DEFAULT),
1841 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1842 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1843 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1844 local_nb[0].lnb_file_offset,
1845 local_nb[count-1].lnb_file_offset +
1846 local_nb[count-1].lnb_len - 1, client_cksum, server_cksum);
1847 filp = filp_open(dbgcksum_file_name,
1848 O_CREAT | O_EXCL | O_WRONLY | O_LARGEFILE, 0600);
1852 CDEBUG(D_INFO, "%s: can't open to dump pages with "
1853 "checksum error: rc = %d\n", dbgcksum_file_name,
1856 CERROR("%s: can't open to dump pages with checksum "
1857 "error: rc = %d\n", dbgcksum_file_name, rc);
1861 for (i = 0; i < count; i++) {
1862 len = local_nb[i].lnb_len;
1863 buf = kmap(local_nb[i].lnb_page);
1865 rc = cfs_kernel_write(filp, buf, len, &filp->f_pos);
1867 CERROR("%s: wanted to write %u but got %d "
1868 "error\n", dbgcksum_file_name, len, rc);
1873 CDEBUG(D_INFO, "%s: wrote %d bytes\n",
1874 dbgcksum_file_name, rc);
1876 kunmap(local_nb[i].lnb_page);
1879 rc = ll_vfs_fsync_range(filp, 0, LLONG_MAX, 1);
1881 CERROR("%s: sync returns %d\n", dbgcksum_file_name, rc);
1882 filp_close(filp, NULL);
1886 static int check_read_checksum(struct niobuf_local *local_nb, int npages,
1887 struct obd_export *exp, struct obdo *oa,
1888 const struct lnet_process_id *peer,
1889 __u32 client_cksum, __u32 server_cksum,
1890 enum cksum_types server_cksum_type)
1893 enum cksum_types cksum_type;
1896 /* unlikely to happen and only if resend does not occur due to cksum
1897 * control failure on Client */
1898 if (unlikely(server_cksum == client_cksum)) {
1899 CDEBUG(D_PAGE, "checksum %x confirmed upon retry\n",
1904 if (exp->exp_obd->obd_checksum_dump)
1905 dump_all_bulk_pages(oa, npages, local_nb, server_cksum,
1908 cksum_type = obd_cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1911 if (cksum_type != server_cksum_type)
1912 msg = "the server may have not used the checksum type specified"
1913 " in the original request - likely a protocol problem";
1915 msg = "should have changed on the client or in transit";
1917 start = local_nb[0].lnb_file_offset;
1918 end = local_nb[npages-1].lnb_file_offset +
1919 local_nb[npages-1].lnb_len - 1;
1921 LCONSOLE_ERROR_MSG(0x132, "%s: BAD READ CHECKSUM: %s: from %s inode "
1922 DFID " object "DOSTID" extent [%llu-%llu], client returned csum"
1923 " %x (type %x), server csum %x (type %x)\n",
1924 exp->exp_obd->obd_name,
1925 msg, libcfs_nid2str(peer->nid),
1926 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : 0ULL,
1927 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1928 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1930 start, end, client_cksum, cksum_type, server_cksum,
1936 static int tgt_pages2shortio(struct niobuf_local *local, int npages,
1937 unsigned char *buf, int size)
1939 int i, off, len, copied = size;
1942 for (i = 0; i < npages; i++) {
1943 off = local[i].lnb_page_offset & ~PAGE_MASK;
1944 len = local[i].lnb_len;
1946 CDEBUG(D_PAGE, "index %d offset = %d len = %d left = %d\n",
1951 ptr = ll_kmap_atomic(local[i].lnb_page, KM_USER0);
1952 memcpy(buf + off, ptr, len);
1953 ll_kunmap_atomic(ptr, KM_USER0);
1957 return copied - size;
1960 static int tgt_checksum_niobuf_t10pi(struct lu_target *tgt,
1961 struct niobuf_local *local_nb,
1962 int npages, int opc,
1963 obd_dif_csum_fn *fn,
1967 enum cksum_types t10_cksum_type = tgt->lut_dt_conf.ddp_t10_cksum_type;
1968 unsigned char cfs_alg = cksum_obd2cfs(OBD_CKSUM_T10_TOP);
1969 const char *obd_name = tgt->lut_obd->obd_name;
1970 struct ahash_request *req;
1971 unsigned int bufsize;
1972 unsigned char *buffer;
1973 struct page *__page;
1976 int used_number = 0;
1982 __page = alloc_page(GFP_KERNEL);
1986 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1988 CERROR("%s: unable to initialize checksum hash %s\n",
1989 tgt_name(tgt), cfs_crypto_hash_name(cfs_alg));
1990 return PTR_ERR(req);
1993 buffer = kmap(__page);
1994 guard_start = (__u16 *)buffer;
1995 guard_number = PAGE_SIZE / sizeof(*guard_start);
1996 for (i = 0; i < npages; i++) {
1997 /* corrupt the data before we compute the checksum, to
1998 * simulate a client->OST data error */
1999 if (i == 0 && opc == OST_WRITE &&
2000 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) {
2001 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
2002 int len = local_nb[i].lnb_len;
2003 struct page *np = tgt_page_to_corrupt;
2006 char *ptr = ll_kmap_atomic(local_nb[i].lnb_page,
2008 char *ptr2 = page_address(np);
2010 memcpy(ptr2 + off, ptr + off, len);
2011 memcpy(ptr2 + off, "bad3", min(4, len));
2012 ll_kunmap_atomic(ptr, KM_USER0);
2014 /* LU-8376 to preserve original index for
2015 * display in dump_all_bulk_pages() */
2018 cfs_crypto_hash_update_page(req, np, off,
2022 CERROR("%s: can't alloc page for corruption\n",
2028 * The left guard number should be able to hold checksums of a
2031 if (t10_cksum_type && opc == OST_READ &&
2032 local_nb[i].lnb_guard_disk) {
2033 used = DIV_ROUND_UP(local_nb[i].lnb_len, sector_size);
2034 if (used > (guard_number - used_number)) {
2038 memcpy(guard_start + used_number,
2039 local_nb[i].lnb_guards,
2040 used * sizeof(*local_nb[i].lnb_guards));
2042 rc = obd_page_dif_generate_buffer(obd_name,
2043 local_nb[i].lnb_page,
2044 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2045 local_nb[i].lnb_len, guard_start + used_number,
2046 guard_number - used_number, &used, sector_size,
2052 LASSERT(used <= MAX_GUARD_NUMBER);
2054 * If disk support T10PI checksum, copy guards to local_nb.
2055 * If the write is partial page, do not use the guards for bio
2056 * submission since the data might not be full-sector. The bio
2057 * guards will be generated later based on the full sectors. If
2058 * the sector size is 512B rather than 4 KB, or the page size
2059 * is larger than 4KB, this might drop some useful guards for
2060 * partial page write, but it will only add minimal extra time
2061 * of checksum calculation.
2063 if (t10_cksum_type && opc == OST_WRITE &&
2064 local_nb[i].lnb_len == PAGE_SIZE) {
2065 local_nb[i].lnb_guard_rpc = 1;
2066 memcpy(local_nb[i].lnb_guards,
2067 guard_start + used_number,
2068 used * sizeof(*local_nb[i].lnb_guards));
2071 used_number += used;
2072 if (used_number == guard_number) {
2073 cfs_crypto_hash_update_page(req, __page, 0,
2074 used_number * sizeof(*guard_start));
2078 /* corrupt the data after we compute the checksum, to
2079 * simulate an OST->client data error */
2080 if (unlikely(i == 0 && opc == OST_READ &&
2081 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND))) {
2082 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
2083 int len = local_nb[i].lnb_len;
2084 struct page *np = tgt_page_to_corrupt;
2087 char *ptr = ll_kmap_atomic(local_nb[i].lnb_page,
2089 char *ptr2 = page_address(np);
2091 memcpy(ptr2 + off, ptr + off, len);
2092 memcpy(ptr2 + off, "bad4", min(4, len));
2093 ll_kunmap_atomic(ptr, KM_USER0);
2095 /* LU-8376 to preserve original index for
2096 * display in dump_all_bulk_pages() */
2099 cfs_crypto_hash_update_page(req, np, off,
2103 CERROR("%s: can't alloc page for corruption\n",
2112 if (used_number != 0)
2113 cfs_crypto_hash_update_page(req, __page, 0,
2114 used_number * sizeof(*guard_start));
2116 bufsize = sizeof(cksum);
2117 rc = cfs_crypto_hash_final(req, (unsigned char *)&cksum, &bufsize);
2122 __free_page(__page);
2126 static int tgt_checksum_niobuf_rw(struct lu_target *tgt,
2127 enum cksum_types cksum_type,
2128 struct niobuf_local *local_nb,
2129 int npages, int opc, u32 *check_sum)
2131 obd_dif_csum_fn *fn = NULL;
2132 int sector_size = 0;
2136 obd_t10_cksum2dif(cksum_type, &fn, §or_size);
2139 rc = tgt_checksum_niobuf_t10pi(tgt, local_nb, npages,
2140 opc, fn, sector_size,
2143 rc = tgt_checksum_niobuf(tgt, local_nb, npages, opc,
2144 cksum_type, check_sum);
2148 int tgt_brw_read(struct tgt_session_info *tsi)
2150 struct ptlrpc_request *req = tgt_ses_req(tsi);
2151 struct ptlrpc_bulk_desc *desc = NULL;
2152 struct obd_export *exp = tsi->tsi_exp;
2153 struct niobuf_remote *remote_nb;
2154 struct niobuf_local *local_nb;
2155 struct obd_ioobj *ioo;
2156 struct ost_body *body, *repbody;
2157 struct l_wait_info lwi;
2158 struct lustre_handle lockh = { 0 };
2159 int npages, nob = 0, rc, i, no_reply = 0,
2161 struct tgt_thread_big_cache *tbc = req->rq_svc_thread->t_data;
2162 const char *obd_name = exp->exp_obd->obd_name;
2166 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL &&
2167 ptlrpc_req2svc(req)->srv_req_portal != MDS_IO_PORTAL) {
2168 CERROR("%s: deny read request from %s to portal %u\n",
2169 tgt_name(tsi->tsi_tgt),
2170 obd_export_nid2str(req->rq_export),
2171 ptlrpc_req2svc(req)->srv_req_portal);
2175 req->rq_bulk_read = 1;
2177 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_READ_BULK))
2180 OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, cfs_fail_val > 0 ?
2181 cfs_fail_val : (obd_timeout + 1) / 4);
2183 /* Check if there is eviction in progress, and if so, wait for it to
2185 if (unlikely(atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
2186 /* We do not care how long it takes */
2187 lwi = LWI_INTR(NULL, NULL);
2188 rc = l_wait_event(exp->exp_obd->obd_evict_inprogress_waitq,
2189 !atomic_read(&exp->exp_obd->obd_evict_inprogress),
2193 /* There must be big cache in current thread to process this request
2194 * if it is NULL then something went wrong and it wasn't allocated,
2195 * report -ENOMEM in that case */
2199 body = tsi->tsi_ost_body;
2200 LASSERT(body != NULL);
2202 ioo = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_IOOBJ);
2203 LASSERT(ioo != NULL); /* must exists after tgt_ost_body_unpack */
2205 remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
2206 LASSERT(remote_nb != NULL); /* must exists after tgt_ost_body_unpack */
2208 local_nb = tbc->local;
2210 rc = tgt_brw_lock(tsi->tsi_env, exp, &tsi->tsi_resid, ioo, remote_nb,
2216 * If getting the lock took more time than
2217 * client was willing to wait, drop it. b=11330
2219 if (ktime_get_real_seconds() > req->rq_deadline ||
2220 OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
2222 CERROR("Dropping timed-out read from %s because locking object " DOSTID " took %lld seconds (limit was %lld).\n",
2223 libcfs_id2str(req->rq_peer), POSTID(&ioo->ioo_oid),
2224 ktime_get_real_seconds() - req->rq_arrival_time.tv_sec,
2225 req->rq_deadline - req->rq_arrival_time.tv_sec);
2226 GOTO(out_lock, rc = -ETIMEDOUT);
2229 repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
2230 repbody->oa = body->oa;
2232 npages = PTLRPC_MAX_BRW_PAGES;
2233 rc = obd_preprw(tsi->tsi_env, OBD_BRW_READ, exp, &repbody->oa, 1,
2234 ioo, remote_nb, &npages, local_nb);
2238 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2239 body->oa.o_flags & OBD_FL_SHORT_IO) {
2242 desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
2243 PTLRPC_BULK_PUT_SOURCE |
2244 PTLRPC_BULK_BUF_KIOV,
2246 &ptlrpc_bulk_kiov_nopin_ops);
2248 GOTO(out_commitrw, rc = -ENOMEM);
2252 npages_read = npages;
2253 for (i = 0; i < npages; i++) {
2254 int page_rc = local_nb[i].lnb_rc;
2263 if (page_rc != 0 && desc != NULL) { /* some data! */
2264 LASSERT(local_nb[i].lnb_page != NULL);
2265 desc->bd_frag_ops->add_kiov_frag
2266 (desc, local_nb[i].lnb_page,
2267 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2271 if (page_rc != local_nb[i].lnb_len) { /* short read */
2272 local_nb[i].lnb_len = page_rc;
2273 npages_read = i + (page_rc != 0 ? 1 : 0);
2274 /* All subsequent pages should be 0 */
2275 while (++i < npages)
2276 LASSERT(local_nb[i].lnb_rc == 0);
2280 if (OBD_FAIL_CHECK(OBD_FAIL_OST_READ_SIZE) &&
2281 nob != cfs_fail_val)
2284 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
2285 u32 flag = body->oa.o_valid & OBD_MD_FLFLAGS ?
2286 body->oa.o_flags : 0;
2287 enum cksum_types cksum_type = obd_cksum_type_unpack(flag);
2289 repbody->oa.o_flags = obd_cksum_type_pack(obd_name,
2291 repbody->oa.o_valid = OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
2293 rc = tgt_checksum_niobuf_rw(tsi->tsi_tgt, cksum_type,
2294 local_nb, npages_read, OST_READ,
2295 &repbody->oa.o_cksum);
2297 GOTO(out_commitrw, rc);
2298 CDEBUG(D_PAGE, "checksum at read origin: %x\n",
2299 repbody->oa.o_cksum);
2301 /* if a resend it could be for a cksum error, so check Server
2302 * cksum with returned Client cksum (this should even cover
2303 * zero-cksum case) */
2304 if ((body->oa.o_valid & OBD_MD_FLFLAGS) &&
2305 (body->oa.o_flags & OBD_FL_RECOV_RESEND))
2306 check_read_checksum(local_nb, npages_read, exp,
2307 &body->oa, &req->rq_peer,
2309 repbody->oa.o_cksum, cksum_type);
2311 repbody->oa.o_valid = 0;
2313 /* We're finishing using body->oa as an input variable */
2315 /* Check if client was evicted while we were doing i/o before touching
2318 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2319 body->oa.o_flags & OBD_FL_SHORT_IO) {
2320 unsigned char *short_io_buf;
2323 short_io_buf = req_capsule_server_get(&req->rq_pill,
2325 short_io_size = req_capsule_get_size(&req->rq_pill,
2328 rc = tgt_pages2shortio(local_nb, npages_read,
2329 short_io_buf, short_io_size);
2331 req_capsule_shrink(&req->rq_pill,
2334 rc = rc > 0 ? 0 : rc;
2335 } else if (!CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)) {
2336 rc = target_bulk_io(exp, desc, &lwi);
2340 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2341 body->oa.o_flags & OBD_FL_SHORT_IO)
2342 req_capsule_shrink(&req->rq_pill, &RMF_SHORT_IO, 0,
2347 /* Must commit after prep above in all cases */
2348 rc = obd_commitrw(tsi->tsi_env, OBD_BRW_READ, exp, &repbody->oa, 1, ioo,
2349 remote_nb, npages, local_nb, rc);
2351 tgt_brw_unlock(ioo, remote_nb, &lockh, LCK_PR);
2353 if (desc && !CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2))
2354 ptlrpc_free_bulk(desc);
2359 ptlrpc_lprocfs_brw(req, nob);
2360 } else if (no_reply) {
2361 req->rq_no_reply = 1;
2362 /* reply out callback would free */
2363 ptlrpc_req_drop_rs(req);
2364 LCONSOLE_WARN("%s: Bulk IO read error with %s (at %s), "
2365 "client will retry: rc %d\n",
2367 obd_uuid2str(&exp->exp_client_uuid),
2368 obd_export_nid2str(exp), rc);
2370 /* send a bulk after reply to simulate a network delay or reordering
2371 * by a router - Note that !desc implies short io, so there is no bulk
2373 if (unlikely(CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)) &&
2375 wait_queue_head_t waitq;
2376 struct l_wait_info lwi1;
2378 CDEBUG(D_INFO, "reorder BULK\n");
2379 init_waitqueue_head(&waitq);
2381 lwi1 = LWI_TIMEOUT_INTR(cfs_time_seconds(3), NULL, NULL, NULL);
2382 l_wait_event(waitq, 0, &lwi1);
2383 target_bulk_io(exp, desc, &lwi);
2384 ptlrpc_free_bulk(desc);
2389 EXPORT_SYMBOL(tgt_brw_read);
2391 static int tgt_shortio2pages(struct niobuf_local *local, int npages,
2392 unsigned char *buf, unsigned int size)
2397 for (i = 0; i < npages; i++) {
2398 off = local[i].lnb_page_offset & ~PAGE_MASK;
2399 len = local[i].lnb_len;
2404 CDEBUG(D_PAGE, "index %d offset = %d len = %d left = %d\n",
2406 ptr = ll_kmap_atomic(local[i].lnb_page, KM_USER0);
2409 memcpy(ptr + off, buf, len < size ? len : size);
2410 ll_kunmap_atomic(ptr, KM_USER0);
2417 static void tgt_warn_on_cksum(struct ptlrpc_request *req,
2418 struct ptlrpc_bulk_desc *desc,
2419 struct niobuf_local *local_nb, int npages,
2420 u32 client_cksum, u32 server_cksum,
2423 struct obd_export *exp = req->rq_export;
2424 struct ost_body *body;
2428 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2429 LASSERT(body != NULL);
2431 if (desc && req->rq_peer.nid != desc->bd_sender) {
2433 router = libcfs_nid2str(desc->bd_sender);
2436 if (exp->exp_obd->obd_checksum_dump)
2437 dump_all_bulk_pages(&body->oa, npages, local_nb, server_cksum,
2441 CDEBUG_LIMIT(D_INFO, "client csum %x, server csum %x\n",
2442 client_cksum, server_cksum);
2446 LCONSOLE_ERROR_MSG(0x168, "%s: BAD WRITE CHECKSUM: from %s%s%s inode "
2447 DFID" object "DOSTID" extent [%llu-%llu"
2448 "]: client csum %x, server csum %x\n",
2449 exp->exp_obd->obd_name, libcfs_id2str(req->rq_peer),
2451 body->oa.o_valid & OBD_MD_FLFID ?
2452 body->oa.o_parent_seq : (__u64)0,
2453 body->oa.o_valid & OBD_MD_FLFID ?
2454 body->oa.o_parent_oid : 0,
2455 body->oa.o_valid & OBD_MD_FLFID ?
2456 body->oa.o_parent_ver : 0,
2457 POSTID(&body->oa.o_oi),
2458 local_nb[0].lnb_file_offset,
2459 local_nb[npages-1].lnb_file_offset +
2460 local_nb[npages - 1].lnb_len - 1,
2461 client_cksum, server_cksum);
2464 int tgt_brw_write(struct tgt_session_info *tsi)
2466 struct ptlrpc_request *req = tgt_ses_req(tsi);
2467 struct ptlrpc_bulk_desc *desc = NULL;
2468 struct obd_export *exp = req->rq_export;
2469 struct niobuf_remote *remote_nb;
2470 struct niobuf_local *local_nb;
2471 struct obd_ioobj *ioo;
2472 struct ost_body *body, *repbody;
2473 struct l_wait_info lwi;
2474 struct lustre_handle lockh = {0};
2476 int objcount, niocount, npages;
2478 enum cksum_types cksum_type = OBD_CKSUM_CRC32;
2479 bool no_reply = false, mmap;
2480 struct tgt_thread_big_cache *tbc = req->rq_svc_thread->t_data;
2481 bool wait_sync = false;
2482 const char *obd_name = exp->exp_obd->obd_name;
2486 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL &&
2487 ptlrpc_req2svc(req)->srv_req_portal != MDS_IO_PORTAL) {
2488 CERROR("%s: deny write request from %s to portal %u\n",
2489 tgt_name(tsi->tsi_tgt),
2490 obd_export_nid2str(req->rq_export),
2491 ptlrpc_req2svc(req)->srv_req_portal);
2492 RETURN(err_serious(-EPROTO));
2495 if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOSPC))
2496 RETURN(err_serious(-ENOSPC));
2497 if (OBD_FAIL_TIMEOUT(OBD_FAIL_OST_EROFS, 1))
2498 RETURN(err_serious(-EROFS));
2500 req->rq_bulk_write = 1;
2502 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
2503 RETURN(err_serious(-EIO));
2504 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK2))
2505 RETURN(err_serious(-EFAULT));
2507 /* pause before transaction has been started */
2508 CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, cfs_fail_val > 0 ?
2509 cfs_fail_val : (obd_timeout + 1) / 4);
2511 /* Delay write commit to show stale size information */
2512 CFS_FAIL_TIMEOUT(OBD_FAIL_OSC_NO_SIZE_DATA, cfs_fail_val);
2514 /* There must be big cache in current thread to process this request
2515 * if it is NULL then something went wrong and it wasn't allocated,
2516 * report -ENOMEM in that case */
2520 body = tsi->tsi_ost_body;
2521 LASSERT(body != NULL);
2523 ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
2524 LASSERT(ioo != NULL); /* must exists after tgt_ost_body_unpack */
2526 objcount = req_capsule_get_size(&req->rq_pill, &RMF_OBD_IOOBJ,
2527 RCL_CLIENT) / sizeof(*ioo);
2529 for (niocount = i = 0; i < objcount; i++)
2530 niocount += ioo[i].ioo_bufcnt;
2532 remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
2533 LASSERT(remote_nb != NULL); /* must exists after tgt_ost_body_unpack */
2534 if (niocount != req_capsule_get_size(&req->rq_pill,
2535 &RMF_NIOBUF_REMOTE, RCL_CLIENT) /
2537 RETURN(err_serious(-EPROTO));
2539 if ((remote_nb[0].rnb_flags & OBD_BRW_MEMALLOC) &&
2540 ptlrpc_connection_is_local(exp->exp_connection))
2541 memory_pressure_set();
2543 req_capsule_set_size(&req->rq_pill, &RMF_RCS, RCL_SERVER,
2544 niocount * sizeof(*rcs));
2545 rc = req_capsule_server_pack(&req->rq_pill);
2547 GOTO(out, rc = err_serious(rc));
2549 CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_PACK, cfs_fail_val);
2550 rcs = req_capsule_server_get(&req->rq_pill, &RMF_RCS);
2552 local_nb = tbc->local;
2554 rc = tgt_brw_lock(tsi->tsi_env, exp, &tsi->tsi_resid, ioo, remote_nb,
2560 * If getting the lock took more time than
2561 * client was willing to wait, drop it. b=11330
2563 if (ktime_get_real_seconds() > req->rq_deadline ||
2564 OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
2566 CERROR("%s: Dropping timed-out write from %s because locking object " DOSTID " took %lld seconds (limit was %lld).\n",
2567 tgt_name(tsi->tsi_tgt), libcfs_id2str(req->rq_peer),
2568 POSTID(&ioo->ioo_oid),
2569 ktime_get_real_seconds() - req->rq_arrival_time.tv_sec,
2570 req->rq_deadline - req->rq_arrival_time.tv_sec);
2571 GOTO(out_lock, rc = -ETIMEDOUT);
2574 /* Because we already sync grant info with client when reconnect,
2575 * grant info will be cleared for resent req, then fed_grant and
2576 * total_grant will not be modified in following preprw_write */
2577 if (lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY)) {
2578 DEBUG_REQ(D_CACHE, req, "clear resent/replay req grant info");
2579 body->oa.o_valid &= ~OBD_MD_FLGRANT;
2582 repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
2583 if (repbody == NULL)
2584 GOTO(out_lock, rc = -ENOMEM);
2585 repbody->oa = body->oa;
2587 npages = PTLRPC_MAX_BRW_PAGES;
2588 rc = obd_preprw(tsi->tsi_env, OBD_BRW_WRITE, exp, &repbody->oa,
2589 objcount, ioo, remote_nb, &npages, local_nb);
2592 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2593 body->oa.o_flags & OBD_FL_SHORT_IO) {
2594 unsigned int short_io_size;
2595 unsigned char *short_io_buf;
2597 short_io_size = req_capsule_get_size(&req->rq_pill,
2600 short_io_buf = req_capsule_client_get(&req->rq_pill,
2602 CDEBUG(D_INFO, "Client use short io for data transfer,"
2603 " size = %d\n", short_io_size);
2605 /* Copy short io buf to pages */
2606 rc = tgt_shortio2pages(local_nb, npages, short_io_buf,
2610 desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
2611 PTLRPC_BULK_GET_SINK |
2612 PTLRPC_BULK_BUF_KIOV,
2614 &ptlrpc_bulk_kiov_nopin_ops);
2616 GOTO(skip_transfer, rc = -ENOMEM);
2618 /* NB Having prepped, we must commit... */
2619 for (i = 0; i < npages; i++)
2620 desc->bd_frag_ops->add_kiov_frag(desc,
2621 local_nb[i].lnb_page,
2622 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2623 local_nb[i].lnb_len);
2625 rc = sptlrpc_svc_prep_bulk(req, desc);
2627 GOTO(skip_transfer, rc);
2629 rc = target_bulk_io(exp, desc, &lwi);
2635 if (body->oa.o_valid & OBD_MD_FLCKSUM && rc == 0) {
2636 static int cksum_counter;
2638 if (body->oa.o_valid & OBD_MD_FLFLAGS)
2639 cksum_type = obd_cksum_type_unpack(body->oa.o_flags);
2641 repbody->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
2642 repbody->oa.o_flags &= ~OBD_FL_CKSUM_ALL;
2643 repbody->oa.o_flags |= obd_cksum_type_pack(obd_name,
2646 rc = tgt_checksum_niobuf_rw(tsi->tsi_tgt, cksum_type,
2647 local_nb, npages, OST_WRITE,
2648 &repbody->oa.o_cksum);
2650 GOTO(out_commitrw, rc);
2654 if (unlikely(body->oa.o_cksum != repbody->oa.o_cksum)) {
2655 mmap = (body->oa.o_valid & OBD_MD_FLFLAGS &&
2656 body->oa.o_flags & OBD_FL_MMAP);
2658 tgt_warn_on_cksum(req, desc, local_nb, npages,
2660 repbody->oa.o_cksum, mmap);
2662 } else if ((cksum_counter & (-cksum_counter)) ==
2664 CDEBUG(D_INFO, "Checksum %u from %s OK: %x\n",
2665 cksum_counter, libcfs_id2str(req->rq_peer),
2666 repbody->oa.o_cksum);
2671 /* Must commit after prep above in all cases */
2672 rc = obd_commitrw(tsi->tsi_env, OBD_BRW_WRITE, exp, &repbody->oa,
2673 objcount, ioo, remote_nb, npages, local_nb, rc);
2674 if (rc == -ENOTCONN)
2675 /* quota acquire process has been given up because
2676 * either the client has been evicted or the client
2677 * has timed out the request already */
2680 for (i = 0; i < niocount; i++) {
2681 if (!(local_nb[i].lnb_flags & OBD_BRW_ASYNC)) {
2687 * Disable sending mtime back to the client. If the client locked the
2688 * whole object, then it has already updated the mtime on its side,
2689 * otherwise it will have to glimpse anyway (see bug 21489, comment 32)
2691 repbody->oa.o_valid &= ~(OBD_MD_FLMTIME | OBD_MD_FLATIME);
2696 /* set per-requested niobuf return codes */
2697 for (i = j = 0; i < niocount; i++) {
2698 int len = remote_nb[i].rnb_len;
2703 LASSERT(j < npages);
2704 if (local_nb[j].lnb_rc < 0)
2705 rcs[i] = local_nb[j].lnb_rc;
2706 len -= local_nb[j].lnb_len;
2711 LASSERT(j == npages);
2712 ptlrpc_lprocfs_brw(req, nob);
2715 tgt_brw_unlock(ioo, remote_nb, &lockh, LCK_PW);
2717 ptlrpc_free_bulk(desc);
2719 if (unlikely(no_reply || (exp->exp_obd->obd_no_transno && wait_sync))) {
2720 req->rq_no_reply = 1;
2721 /* reply out callback would free */
2722 ptlrpc_req_drop_rs(req);
2723 if (!exp->exp_obd->obd_no_transno)
2724 LCONSOLE_WARN("%s: Bulk IO write error with %s (at %s),"
2725 " client will retry: rc = %d\n",
2727 obd_uuid2str(&exp->exp_client_uuid),
2728 obd_export_nid2str(exp), rc);
2730 memory_pressure_clr();
2733 EXPORT_SYMBOL(tgt_brw_write);
2735 /* Check if request can be reconstructed from saved reply data
2736 * A copy of the reply data is returned in @trd if the pointer is not NULL
2738 bool req_can_reconstruct(struct ptlrpc_request *req,
2739 struct tg_reply_data *trd)
2741 struct tg_export_data *ted = &req->rq_export->exp_target_data;
2742 struct lsd_client_data *lcd = ted->ted_lcd;
2745 if (tgt_is_multimodrpcs_client(req->rq_export))
2746 return tgt_lookup_reply(req, trd);
2748 mutex_lock(&ted->ted_lcd_lock);
2749 found = req->rq_xid == lcd->lcd_last_xid ||
2750 req->rq_xid == lcd->lcd_last_close_xid;
2752 if (found && trd != NULL) {
2753 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE) {
2754 trd->trd_reply.lrd_xid = lcd->lcd_last_close_xid;
2755 trd->trd_reply.lrd_transno =
2756 lcd->lcd_last_close_transno;
2757 trd->trd_reply.lrd_result = lcd->lcd_last_close_result;
2759 trd->trd_reply.lrd_xid = lcd->lcd_last_xid;
2760 trd->trd_reply.lrd_transno = lcd->lcd_last_transno;
2761 trd->trd_reply.lrd_result = lcd->lcd_last_result;
2762 trd->trd_reply.lrd_data = lcd->lcd_last_data;
2763 trd->trd_pre_versions[0] = lcd->lcd_pre_versions[0];
2764 trd->trd_pre_versions[1] = lcd->lcd_pre_versions[1];
2765 trd->trd_pre_versions[2] = lcd->lcd_pre_versions[2];
2766 trd->trd_pre_versions[3] = lcd->lcd_pre_versions[3];
2769 mutex_unlock(&ted->ted_lcd_lock);
2773 EXPORT_SYMBOL(req_can_reconstruct);