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 #include <linux/delay.h>
39 #ifdef HAVE_UIDGID_HEADER
40 # include <linux/uidgid.h>
44 #include <obd_class.h>
45 #include <obd_cksum.h>
46 #include <lustre_lfsck.h>
47 #include <lustre_nodemap.h>
48 #include <lustre_acl.h>
50 #include "tgt_internal.h"
52 char *tgt_name(struct lu_target *tgt)
54 LASSERT(tgt->lut_obd != NULL);
55 return tgt->lut_obd->obd_name;
57 EXPORT_SYMBOL(tgt_name);
60 * Generic code handling requests that have struct mdt_body passed in:
62 * - extract mdt_body from request and save it in @tsi, if present;
64 * - create lu_object, corresponding to the fid in mdt_body, and save it in
67 * - if HAS_BODY flag is set for this request type check whether object
68 * actually exists on storage (lu_object_exists()).
71 static int tgt_mdt_body_unpack(struct tgt_session_info *tsi, __u32 flags)
73 const struct mdt_body *body;
74 struct lu_object *obj;
75 struct req_capsule *pill = tsi->tsi_pill;
80 body = req_capsule_client_get(pill, &RMF_MDT_BODY);
84 tsi->tsi_mdt_body = body;
86 if (!(body->mbo_valid & OBD_MD_FLID))
89 /* mdc_pack_body() doesn't check if fid is zero and set OBD_ML_FID
90 * in any case in pre-2.5 clients. Fix that here if needed */
91 if (unlikely(fid_is_zero(&body->mbo_fid1)))
94 if (!fid_is_sane(&body->mbo_fid1)) {
95 CERROR("%s: invalid FID: "DFID"\n", tgt_name(tsi->tsi_tgt),
96 PFID(&body->mbo_fid1));
100 obj = lu_object_find(tsi->tsi_env,
101 &tsi->tsi_tgt->lut_bottom->dd_lu_dev,
102 &body->mbo_fid1, NULL);
104 if ((flags & HAS_BODY) && !lu_object_exists(obj)) {
105 lu_object_put(tsi->tsi_env, obj);
108 tsi->tsi_corpus = obj;
115 tsi->tsi_fid = body->mbo_fid1;
121 * Validate oa from client.
122 * If the request comes from 2.0 clients, currently only RSVD seq and IDIF
124 * a. objects in Single MDT FS seq = FID_SEQ_OST_MDT0, oi_id != 0
125 * b. Echo objects(seq = 2), old echo client still use oi_id/oi_seq to
126 * pack ost_id. Because non-zero oi_seq will make it diffcult to tell
127 * whether this is oi_fid or real ostid. So it will check
128 * OBD_CONNECT_FID, then convert the ostid to FID for old client.
129 * c. Old FID-disable osc will send IDIF.
130 * d. new FID-enable osc/osp will send normal FID.
132 * And also oi_id/f_oid should always start from 1. oi_id/f_oid = 0 will
133 * be used for LAST_ID file, and only being accessed inside OST now.
135 int tgt_validate_obdo(struct tgt_session_info *tsi, struct obdo *oa)
137 struct ost_id *oi = &oa->o_oi;
138 u64 seq = ostid_seq(oi);
139 u64 id = ostid_id(oi);
143 if (unlikely(!(exp_connect_flags(tsi->tsi_exp) & OBD_CONNECT_FID) &&
144 fid_seq_is_echo(seq))) {
145 /* Sigh 2.[123] client still sends echo req with oi_id = 0
146 * during create, and we will reset this to 1, since this
147 * oi_id is basically useless in the following create process,
148 * but oi_id == 0 will make it difficult to tell whether it is
149 * real FID or ost_id. */
150 oi->oi_fid.f_seq = FID_SEQ_ECHO;
151 oi->oi_fid.f_oid = id ?: 1;
152 oi->oi_fid.f_ver = 0;
154 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
156 if (unlikely((oa->o_valid & OBD_MD_FLID) && id == 0))
157 GOTO(out, rc = -EPROTO);
159 /* Note: this check might be forced in 2.5 or 2.6, i.e.
160 * all of the requests are required to setup FLGROUP */
161 if (unlikely(!(oa->o_valid & OBD_MD_FLGROUP))) {
162 ostid_set_seq_mdt0(oi);
163 oa->o_valid |= OBD_MD_FLGROUP;
167 if (unlikely(!(fid_seq_is_idif(seq) || fid_seq_is_mdt0(seq) ||
168 fid_seq_is_norm(seq) || fid_seq_is_echo(seq))))
169 GOTO(out, rc = -EPROTO);
171 rc = ostid_to_fid(&tti->tti_fid1, oi,
172 tsi->tsi_tgt->lut_lsd.lsd_osd_index);
173 if (unlikely(rc != 0))
176 oi->oi_fid = tti->tti_fid1;
182 CERROR("%s: client %s sent bad object "DOSTID": rc = %d\n",
183 tgt_name(tsi->tsi_tgt), obd_export_nid2str(tsi->tsi_exp),
187 EXPORT_SYMBOL(tgt_validate_obdo);
189 static int tgt_io_data_unpack(struct tgt_session_info *tsi, struct ost_id *oi)
192 struct niobuf_remote *rnb;
193 struct obd_ioobj *ioo;
198 ioo = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_IOOBJ);
202 rnb = req_capsule_client_get(tsi->tsi_pill, &RMF_NIOBUF_REMOTE);
206 max_brw = ioobj_max_brw_get(ioo);
207 if (unlikely((max_brw & (max_brw - 1)) != 0)) {
208 CERROR("%s: client %s sent bad ioobj max %u for "DOSTID
209 ": rc = %d\n", tgt_name(tsi->tsi_tgt),
210 obd_export_nid2str(tsi->tsi_exp), max_brw,
211 POSTID(oi), -EPROTO);
216 obj_count = req_capsule_get_size(tsi->tsi_pill, &RMF_OBD_IOOBJ,
217 RCL_CLIENT) / sizeof(*ioo);
218 if (obj_count == 0) {
219 CERROR("%s: short ioobj\n", tgt_name(tsi->tsi_tgt));
221 } else if (obj_count > 1) {
222 CERROR("%s: too many ioobjs (%d)\n", tgt_name(tsi->tsi_tgt),
227 if (ioo->ioo_bufcnt == 0) {
228 CERROR("%s: ioo has zero bufcnt\n", tgt_name(tsi->tsi_tgt));
232 if (ioo->ioo_bufcnt > PTLRPC_MAX_BRW_PAGES) {
233 DEBUG_REQ(D_RPCTRACE, tgt_ses_req(tsi),
234 "bulk has too many pages (%d)",
242 static int tgt_ost_body_unpack(struct tgt_session_info *tsi, __u32 flags)
244 struct ost_body *body;
245 struct req_capsule *pill = tsi->tsi_pill;
246 struct lu_nodemap *nodemap;
251 body = req_capsule_client_get(pill, &RMF_OST_BODY);
255 rc = tgt_validate_obdo(tsi, &body->oa);
259 nodemap = nodemap_get_from_exp(tsi->tsi_exp);
261 RETURN(PTR_ERR(nodemap));
263 body->oa.o_uid = nodemap_map_id(nodemap, NODEMAP_UID,
264 NODEMAP_CLIENT_TO_FS,
266 body->oa.o_gid = nodemap_map_id(nodemap, NODEMAP_GID,
267 NODEMAP_CLIENT_TO_FS,
269 nodemap_putref(nodemap);
271 tsi->tsi_ost_body = body;
272 tsi->tsi_fid = body->oa.o_oi.oi_fid;
274 if (req_capsule_has_field(pill, &RMF_OBD_IOOBJ, RCL_CLIENT)) {
275 rc = tgt_io_data_unpack(tsi, &body->oa.o_oi);
280 if (!(body->oa.o_valid & OBD_MD_FLID)) {
281 if (flags & HAS_BODY) {
282 CERROR("%s: OBD_MD_FLID flag is not set in ost_body but OID/FID is mandatory with HAS_BODY\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 & (HAS_BODY | HAS_REPLY),
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 & IS_MUTABLE && tgt_conn_flags(tsi) & OBD_CONNECT_RDONLY)
339 if (flags & HAS_KEY) {
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 & HAS_REPLY) {
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,
466 "%s: %s handler did not pack reply but returned no error",
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) == 1) {
558 if (!(lustre_msg_get_flags(req->rq_reqmsg) &
559 (MSG_RESENT | MSG_REPLAY))) {
560 DEBUG_REQ(D_WARNING, req,
561 "rq_xid=%llu matches saved XID, expected REPLAY or RESENT flag (%x)",
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",
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)
635 struct obd_export *exp = req->rq_export;
636 struct tg_export_data *ted = &exp->exp_target_data;
637 bool need_lock = tgt_is_multimodrpcs_client(exp);
641 mutex_lock(&ted->ted_lcd_lock);
642 /* check request's xid is consistent with export's last_xid */
643 last_xid = lustre_msg_get_last_xid(req->rq_reqmsg);
644 if (last_xid > exp->exp_last_xid)
645 exp->exp_last_xid = last_xid;
647 if (req->rq_xid == 0 || req->rq_xid <= exp->exp_last_xid) {
648 /* Some request is allowed to be sent during replay,
649 * such as OUT update requests, FLD requests, so it
650 * is possible that replay requests has smaller XID
651 * than the exp_last_xid.
653 * Some non-replay requests may have smaller XID as
656 * - Client send a no_resend RPC, like statfs;
657 * - The RPC timedout (or some other error) on client,
658 * then it's removed from the unreplied list;
659 * - Client send some other request to bump the
660 * exp_last_xid on server;
661 * - The former RPC got chance to be processed;
663 if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY))
666 DEBUG_REQ(D_WARNING, req,
667 "unexpected xid=%llx != exp_last_xid=%llx, rc = %d",
668 req->rq_xid, exp->exp_last_xid, rc);
673 /* The "last_xid" is the minimum xid among unreplied requests,
674 * if the request is from the previous connection, its xid can
675 * still be larger than "exp_last_xid", then the above check of
676 * xid is not enough to determine whether the request is delayed.
678 * For example, if some replay request was delayed and caused
679 * timeout at client and the replay is restarted, the delayed
680 * replay request will have the larger xid than "exp_last_xid"
682 if (req->rq_export->exp_conn_cnt >
683 lustre_msg_get_conn_cnt(req->rq_reqmsg))
684 GOTO(out, rc = -ESTALE);
686 /* try to release in-memory reply data */
687 if (tgt_is_multimodrpcs_client(exp)) {
688 tgt_handle_received_xid(exp, last_xid);
689 rc = tgt_handle_tag(req);
694 mutex_unlock(&ted->ted_lcd_lock);
699 int tgt_request_handle(struct ptlrpc_request *req)
701 struct tgt_session_info *tsi = tgt_ses_info(req->rq_svc_thread->t_env);
703 struct lustre_msg *msg = req->rq_reqmsg;
704 struct tgt_handler *h;
705 struct lu_target *tgt;
706 int request_fail_id = 0;
707 __u32 opc = lustre_msg_get_opc(msg);
708 struct obd_device *obd;
710 bool is_connect = false;
713 if (unlikely(OBD_FAIL_CHECK(OBD_FAIL_TGT_RECOVERY_REQ_RACE))) {
714 if (cfs_fail_val == 0 &&
715 lustre_msg_get_opc(msg) != OBD_PING &&
716 lustre_msg_get_flags(msg) & MSG_REQ_REPLAY_DONE) {
719 wait_event_idle(cfs_race_waitq, (cfs_race_state == 1));
723 /* Refill the context, to make sure all thread keys are allocated */
724 lu_env_refill(req->rq_svc_thread->t_env);
726 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
727 tsi->tsi_pill = &req->rq_pill;
728 tsi->tsi_env = req->rq_svc_thread->t_env;
730 /* if request has export then get handlers slice from corresponding
731 * target, otherwise that should be connect operation */
732 if (opc == MDS_CONNECT || opc == OST_CONNECT ||
733 opc == MGS_CONNECT) {
735 req_capsule_set(&req->rq_pill, &RQF_CONNECT);
736 rc = target_handle_connect(req);
738 rc = ptlrpc_error(req);
741 /* recovery-small test 18c asks to drop connect reply */
742 if (unlikely(opc == OST_CONNECT &&
743 OBD_FAIL_CHECK(OBD_FAIL_OST_CONNECT_NET2)))
747 if (unlikely(!class_connected_export(req->rq_export))) {
748 if (opc == SEC_CTX_INIT || opc == SEC_CTX_INIT_CONT ||
749 opc == SEC_CTX_FINI) {
750 /* sec context initialization has to be handled
751 * by hand in tgt_handle_request0() */
752 tsi->tsi_reply_fail_id = OBD_FAIL_SEC_CTX_INIT_NET;
754 GOTO(handle_recov, rc = 0);
756 CDEBUG(D_HA, "operation %d on unconnected OST from %s\n",
757 opc, libcfs_id2str(req->rq_peer));
758 req->rq_status = -ENOTCONN;
759 rc = ptlrpc_error(req);
763 tsi->tsi_tgt = tgt = class_exp2tgt(req->rq_export);
764 tsi->tsi_exp = req->rq_export;
765 if (exp_connect_flags(req->rq_export) & OBD_CONNECT_JOBSTATS)
766 tsi->tsi_jobid = lustre_msg_get_jobid(req->rq_reqmsg);
768 tsi->tsi_jobid = NULL;
771 DEBUG_REQ(D_ERROR, req, "%s: No target for connected export",
772 class_exp2obd(req->rq_export)->obd_name);
773 req->rq_status = -EINVAL;
774 rc = ptlrpc_error(req);
778 /* Skip last_xid processing for the recovery thread, otherwise, the
779 * last_xid on same request could be processed twice: first time when
780 * processing the incoming request, second time when the request is
781 * being processed by recovery thread. */
782 obd = class_exp2obd(req->rq_export);
784 /* reset the exp_last_xid on each connection. */
785 req->rq_export->exp_last_xid = 0;
786 } else if (obd->obd_recovery_data.trd_processing_task !=
788 rc = process_req_last_xid(req);
791 rc = ptlrpc_error(req);
796 request_fail_id = tgt->lut_request_fail_id;
797 tsi->tsi_reply_fail_id = tgt->lut_reply_fail_id;
799 h = tgt_handler_find_check(req);
801 req->rq_status = PTR_ERR(h);
802 rc = ptlrpc_error(req);
806 LASSERTF(h->th_opc == opc, "opcode mismatch %d != %d\n",
809 if ((cfs_fail_val == 0 || cfs_fail_val == opc) &&
810 CFS_FAIL_CHECK_ORSET(request_fail_id, CFS_FAIL_ONCE))
813 rc = lustre_msg_check_version(msg, h->th_version);
815 DEBUG_REQ(D_ERROR, req,
816 "%s: drop malformed request version=%08x expect=%08x",
817 tgt_name(tgt), lustre_msg_get_version(msg),
819 req->rq_status = -EINVAL;
820 rc = ptlrpc_error(req);
825 rc = tgt_handle_recovery(req, tsi->tsi_reply_fail_id);
826 if (likely(rc == 1)) {
827 rc = tgt_handle_request0(tsi, h, req);
833 req_capsule_fini(tsi->tsi_pill);
834 if (tsi->tsi_corpus != NULL) {
835 lu_object_put(tsi->tsi_env, tsi->tsi_corpus);
836 tsi->tsi_corpus = NULL;
840 EXPORT_SYMBOL(tgt_request_handle);
842 /** Assign high priority operations to the request if needed. */
843 int tgt_hpreq_handler(struct ptlrpc_request *req)
845 struct tgt_session_info *tsi = tgt_ses_info(req->rq_svc_thread->t_env);
846 struct tgt_handler *h;
851 if (req->rq_export == NULL)
854 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
855 tsi->tsi_pill = &req->rq_pill;
856 tsi->tsi_env = req->rq_svc_thread->t_env;
857 tsi->tsi_tgt = class_exp2tgt(req->rq_export);
858 tsi->tsi_exp = req->rq_export;
860 h = tgt_handler_find_check(req);
866 rc = tgt_request_preprocess(tsi, h, req);
867 if (unlikely(rc != 0))
870 if (h->th_hp != NULL)
874 EXPORT_SYMBOL(tgt_hpreq_handler);
876 void tgt_counter_incr(struct obd_export *exp, int opcode)
878 lprocfs_counter_incr(exp->exp_obd->obd_stats, opcode);
879 if (exp->exp_nid_stats && exp->exp_nid_stats->nid_stats != NULL)
880 lprocfs_counter_incr(exp->exp_nid_stats->nid_stats, opcode);
882 EXPORT_SYMBOL(tgt_counter_incr);
885 * Unified target generic handlers.
888 int tgt_connect_check_sptlrpc(struct ptlrpc_request *req, struct obd_export *exp)
890 struct lu_target *tgt = class_exp2tgt(exp);
891 struct sptlrpc_flavor flvr;
895 LASSERT(tgt->lut_obd);
896 LASSERT(tgt->lut_slice);
898 /* always allow ECHO client */
899 if (unlikely(strcmp(exp->exp_obd->obd_type->typ_name,
900 LUSTRE_ECHO_NAME) == 0)) {
901 exp->exp_flvr.sf_rpc = SPTLRPC_FLVR_ANY;
905 if (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
906 read_lock(&tgt->lut_sptlrpc_lock);
907 sptlrpc_target_choose_flavor(&tgt->lut_sptlrpc_rset,
911 read_unlock(&tgt->lut_sptlrpc_lock);
913 spin_lock(&exp->exp_lock);
914 exp->exp_sp_peer = req->rq_sp_from;
915 exp->exp_flvr = flvr;
917 /* when on mgs, if no restriction is set, or if client
918 * is loopback, allow any flavor */
919 if ((strcmp(exp->exp_obd->obd_type->typ_name,
920 LUSTRE_MGS_NAME) == 0) &&
921 (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_NULL ||
922 LNET_NETTYP(LNET_NIDNET(exp->exp_connection->c_peer.nid))
924 exp->exp_flvr.sf_rpc = SPTLRPC_FLVR_ANY;
926 if (exp->exp_flvr.sf_rpc != SPTLRPC_FLVR_ANY &&
927 exp->exp_flvr.sf_rpc != req->rq_flvr.sf_rpc) {
928 CERROR("%s: unauthorized rpc flavor %x from %s, "
929 "expect %x\n", tgt_name(tgt),
931 libcfs_nid2str(req->rq_peer.nid),
932 exp->exp_flvr.sf_rpc);
935 spin_unlock(&exp->exp_lock);
937 if (exp->exp_sp_peer != req->rq_sp_from) {
938 CERROR("%s: RPC source %s doesn't match %s\n",
940 sptlrpc_part2name(req->rq_sp_from),
941 sptlrpc_part2name(exp->exp_sp_peer));
944 rc = sptlrpc_target_export_check(exp, req);
951 int tgt_adapt_sptlrpc_conf(struct lu_target *tgt)
953 struct sptlrpc_rule_set tmp_rset;
956 if (unlikely(tgt == NULL)) {
957 CERROR("No target passed");
961 sptlrpc_rule_set_init(&tmp_rset);
962 rc = sptlrpc_conf_target_get_rules(tgt->lut_obd, &tmp_rset);
964 CERROR("%s: failed get sptlrpc rules: rc = %d\n",
969 sptlrpc_target_update_exp_flavor(tgt->lut_obd, &tmp_rset);
971 write_lock(&tgt->lut_sptlrpc_lock);
972 sptlrpc_rule_set_free(&tgt->lut_sptlrpc_rset);
973 tgt->lut_sptlrpc_rset = tmp_rset;
974 write_unlock(&tgt->lut_sptlrpc_lock);
978 EXPORT_SYMBOL(tgt_adapt_sptlrpc_conf);
980 int tgt_connect(struct tgt_session_info *tsi)
982 struct ptlrpc_request *req = tgt_ses_req(tsi);
983 struct obd_connect_data *reply;
988 /* XXX: better to call this check right after getting new export but
989 * before last_rcvd slot allocation to avoid server load upon insecure
990 * connects. This is to be fixed after unifiyng all targets.
992 rc = tgt_connect_check_sptlrpc(req, tsi->tsi_exp);
996 /* To avoid exposing partially initialized connection flags, changes up
997 * to this point have been staged in reply->ocd_connect_flags. Now that
998 * connection handling has completed successfully, atomically update
999 * the connect flags in the shared export data structure. LU-1623 */
1000 reply = req_capsule_server_get(tsi->tsi_pill, &RMF_CONNECT_DATA);
1001 spin_lock(&tsi->tsi_exp->exp_lock);
1002 *exp_connect_flags_ptr(tsi->tsi_exp) = reply->ocd_connect_flags;
1003 if (reply->ocd_connect_flags & OBD_CONNECT_FLAGS2)
1004 *exp_connect_flags2_ptr(tsi->tsi_exp) =
1005 reply->ocd_connect_flags2;
1006 tsi->tsi_exp->exp_connect_data.ocd_brw_size = reply->ocd_brw_size;
1007 spin_unlock(&tsi->tsi_exp->exp_lock);
1009 if (strcmp(tsi->tsi_exp->exp_obd->obd_type->typ_name,
1010 LUSTRE_MDT_NAME) == 0) {
1011 rc = req_check_sepol(tsi->tsi_pill);
1018 obd_disconnect(class_export_get(tsi->tsi_exp));
1021 EXPORT_SYMBOL(tgt_connect);
1023 int tgt_disconnect(struct tgt_session_info *tsi)
1029 OBD_FAIL_TIMEOUT(OBD_FAIL_OST_DISCONNECT_DELAY, cfs_fail_val);
1031 rc = target_handle_disconnect(tgt_ses_req(tsi));
1033 RETURN(err_serious(rc));
1037 EXPORT_SYMBOL(tgt_disconnect);
1040 * Unified target OBD handlers
1042 int tgt_obd_ping(struct tgt_session_info *tsi)
1048 /* The target-specific part of OBD_PING request handling.
1049 * It controls Filter Modification Data (FMD) expiration each time
1052 * Valid only for replayable targets, e.g. MDT and OFD
1054 if (tsi->tsi_exp->exp_obd->obd_replayable)
1055 tgt_fmd_expire(tsi->tsi_exp);
1057 rc = req_capsule_server_pack(tsi->tsi_pill);
1059 RETURN(err_serious(rc));
1063 EXPORT_SYMBOL(tgt_obd_ping);
1065 int tgt_obd_log_cancel(struct tgt_session_info *tsi)
1067 return err_serious(-EOPNOTSUPP);
1070 int tgt_send_buffer(struct tgt_session_info *tsi, struct lu_rdbuf *rdbuf)
1072 struct ptlrpc_request *req = tgt_ses_req(tsi);
1073 struct obd_export *exp = req->rq_export;
1074 struct ptlrpc_bulk_desc *desc;
1080 desc = ptlrpc_prep_bulk_exp(req, rdbuf->rb_nbufs, 1,
1081 PTLRPC_BULK_PUT_SOURCE | PTLRPC_BULK_BUF_KVEC,
1082 MDS_BULK_PORTAL, &ptlrpc_bulk_kvec_ops);
1086 for (i = 0; i < rdbuf->rb_nbufs; i++)
1087 desc->bd_frag_ops->add_iov_frag(desc,
1088 rdbuf->rb_bufs[i].lb_buf,
1089 rdbuf->rb_bufs[i].lb_len);
1091 rc = target_bulk_io(exp, desc);
1092 ptlrpc_free_bulk(desc);
1095 EXPORT_SYMBOL(tgt_send_buffer);
1097 int tgt_sendpage(struct tgt_session_info *tsi, struct lu_rdpg *rdpg, int nob)
1099 struct ptlrpc_request *req = tgt_ses_req(tsi);
1100 struct obd_export *exp = req->rq_export;
1101 struct ptlrpc_bulk_desc *desc;
1109 desc = ptlrpc_prep_bulk_exp(req, rdpg->rp_npages, 1,
1110 PTLRPC_BULK_PUT_SOURCE |
1111 PTLRPC_BULK_BUF_KIOV,
1113 &ptlrpc_bulk_kiov_pin_ops);
1117 if (!(exp_connect_flags(exp) & OBD_CONNECT_BRW_SIZE))
1118 /* old client requires reply size in it's PAGE_SIZE,
1119 * which is rdpg->rp_count */
1120 nob = rdpg->rp_count;
1122 for (i = 0, tmpcount = nob; i < rdpg->rp_npages && tmpcount > 0;
1123 i++, tmpcount -= tmpsize) {
1124 tmpsize = min_t(int, tmpcount, PAGE_SIZE);
1125 desc->bd_frag_ops->add_kiov_frag(desc, rdpg->rp_pages[i], 0,
1129 LASSERT(desc->bd_nob == nob);
1130 rc = target_bulk_io(exp, desc);
1131 ptlrpc_free_bulk(desc);
1134 EXPORT_SYMBOL(tgt_sendpage);
1137 * OBD_IDX_READ handler
1139 static int tgt_obd_idx_read(struct tgt_session_info *tsi)
1141 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
1142 struct lu_rdpg *rdpg = &tti->tti_u.rdpg.tti_rdpg;
1143 struct idx_info *req_ii, *rep_ii;
1148 memset(rdpg, 0, sizeof(*rdpg));
1149 req_capsule_set(tsi->tsi_pill, &RQF_OBD_IDX_READ);
1151 /* extract idx_info buffer from request & reply */
1152 req_ii = req_capsule_client_get(tsi->tsi_pill, &RMF_IDX_INFO);
1153 if (req_ii == NULL || req_ii->ii_magic != IDX_INFO_MAGIC)
1154 RETURN(err_serious(-EPROTO));
1156 rc = req_capsule_server_pack(tsi->tsi_pill);
1158 RETURN(err_serious(rc));
1160 rep_ii = req_capsule_server_get(tsi->tsi_pill, &RMF_IDX_INFO);
1162 RETURN(err_serious(-EFAULT));
1163 rep_ii->ii_magic = IDX_INFO_MAGIC;
1165 /* extract hash to start with */
1166 rdpg->rp_hash = req_ii->ii_hash_start;
1168 /* extract requested attributes */
1169 rdpg->rp_attrs = req_ii->ii_attrs;
1171 /* check that fid packed in request is valid and supported */
1172 if (!fid_is_sane(&req_ii->ii_fid))
1174 rep_ii->ii_fid = req_ii->ii_fid;
1177 rep_ii->ii_flags = req_ii->ii_flags;
1179 /* compute number of pages to allocate, ii_count is the number of 4KB
1181 if (req_ii->ii_count <= 0)
1182 GOTO(out, rc = -EFAULT);
1183 rdpg->rp_count = min_t(unsigned int, req_ii->ii_count << LU_PAGE_SHIFT,
1184 exp_max_brw_size(tsi->tsi_exp));
1185 rdpg->rp_npages = (rdpg->rp_count + PAGE_SIZE - 1) >> PAGE_SHIFT;
1187 /* allocate pages to store the containers */
1188 OBD_ALLOC(rdpg->rp_pages, rdpg->rp_npages * sizeof(rdpg->rp_pages[0]));
1189 if (rdpg->rp_pages == NULL)
1190 GOTO(out, rc = -ENOMEM);
1191 for (i = 0; i < rdpg->rp_npages; i++) {
1192 rdpg->rp_pages[i] = alloc_page(GFP_NOFS);
1193 if (rdpg->rp_pages[i] == NULL)
1194 GOTO(out, rc = -ENOMEM);
1197 /* populate pages with key/record pairs */
1198 rc = dt_index_read(tsi->tsi_env, tsi->tsi_tgt->lut_bottom, rep_ii, rdpg);
1202 LASSERTF(rc <= rdpg->rp_count, "dt_index_read() returned more than "
1203 "asked %d > %d\n", rc, rdpg->rp_count);
1205 /* send pages to client */
1206 rc = tgt_sendpage(tsi, rdpg, rc);
1211 if (rdpg->rp_pages) {
1212 for (i = 0; i < rdpg->rp_npages; i++)
1213 if (rdpg->rp_pages[i])
1214 __free_page(rdpg->rp_pages[i]);
1215 OBD_FREE(rdpg->rp_pages,
1216 rdpg->rp_npages * sizeof(rdpg->rp_pages[0]));
1221 struct tgt_handler tgt_obd_handlers[] = {
1222 TGT_OBD_HDL (0, OBD_PING, tgt_obd_ping),
1223 TGT_OBD_HDL (0, OBD_IDX_READ, tgt_obd_idx_read)
1225 EXPORT_SYMBOL(tgt_obd_handlers);
1227 int tgt_sync(const struct lu_env *env, struct lu_target *tgt,
1228 struct dt_object *obj, __u64 start, __u64 end)
1234 /* if no objid is specified, it means "sync whole filesystem" */
1236 rc = dt_sync(env, tgt->lut_bottom);
1237 } else if (dt_version_get(env, obj) >
1238 tgt->lut_obd->obd_last_committed) {
1239 rc = dt_object_sync(env, obj, start, end);
1241 atomic_inc(&tgt->lut_sync_count);
1245 EXPORT_SYMBOL(tgt_sync);
1247 * Unified target DLM handlers.
1251 * Unified target BAST
1253 * Ensure data and metadata are synced to disk when lock is canceled if Sync on
1254 * Cancel (SOC) is enabled. If it's extent lock, normally sync obj is enough,
1255 * but if it's cross-MDT lock, because remote object version is not set, a
1256 * filesystem sync is needed.
1258 * \param lock server side lock
1259 * \param desc lock desc
1260 * \param data ldlm_cb_set_arg
1261 * \param flag indicates whether this cancelling or blocking callback
1262 * \retval 0 on success
1263 * \retval negative number on error
1265 static int tgt_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
1266 void *data, int flag)
1269 struct lu_target *tgt;
1270 struct dt_object *obj = NULL;
1276 tgt = class_exp2tgt(lock->l_export);
1278 if (unlikely(tgt == NULL)) {
1279 CDEBUG(D_ERROR, "%s: No target for connected export\n",
1280 class_exp2obd(lock->l_export)->obd_name);
1284 if (flag == LDLM_CB_CANCELING &&
1285 (lock->l_granted_mode & (LCK_EX | LCK_PW | LCK_GROUP)) &&
1286 (tgt->lut_sync_lock_cancel == ALWAYS_SYNC_ON_CANCEL ||
1287 (tgt->lut_sync_lock_cancel == BLOCKING_SYNC_ON_CANCEL &&
1288 ldlm_is_cbpending(lock))) &&
1289 ((exp_connect_flags(lock->l_export) & OBD_CONNECT_MDS_MDS) ||
1290 lock->l_resource->lr_type == LDLM_EXTENT)) {
1292 __u64 end = OBD_OBJECT_EOF;
1294 rc = lu_env_init(&env, LCT_DT_THREAD);
1295 if (unlikely(rc != 0))
1298 ost_fid_from_resid(&fid, &lock->l_resource->lr_name,
1299 tgt->lut_lsd.lsd_osd_index);
1301 if (lock->l_resource->lr_type == LDLM_EXTENT) {
1302 obj = dt_locate(&env, tgt->lut_bottom, &fid);
1304 GOTO(err_env, rc = PTR_ERR(obj));
1306 if (!dt_object_exists(obj))
1307 GOTO(err_put, rc = -ENOENT);
1309 start = lock->l_policy_data.l_extent.start;
1310 end = lock->l_policy_data.l_extent.end;
1313 rc = tgt_sync(&env, tgt, obj, start, end);
1315 CERROR("%s: syncing "DFID" (%llu-%llu) on lock "
1316 "cancel: rc = %d\n",
1317 tgt_name(tgt), PFID(&fid),
1318 lock->l_policy_data.l_extent.start,
1319 lock->l_policy_data.l_extent.end, rc);
1323 dt_object_put(&env, obj);
1328 rc = ldlm_server_blocking_ast(lock, desc, data, flag);
1332 static struct ldlm_callback_suite tgt_dlm_cbs = {
1333 .lcs_completion = ldlm_server_completion_ast,
1334 .lcs_blocking = tgt_blocking_ast,
1335 .lcs_glimpse = ldlm_server_glimpse_ast
1338 int tgt_enqueue(struct tgt_session_info *tsi)
1340 struct ptlrpc_request *req = tgt_ses_req(tsi);
1345 * tsi->tsi_dlm_req was already swapped and (if necessary) converted,
1346 * tsi->tsi_dlm_cbs was set by the *_req_handle() function.
1348 LASSERT(tsi->tsi_dlm_req != NULL);
1349 rc = ldlm_handle_enqueue0(tsi->tsi_exp->exp_obd->obd_namespace, req,
1350 tsi->tsi_dlm_req, &tgt_dlm_cbs);
1352 RETURN(err_serious(rc));
1354 switch (LUT_FAIL_CLASS(tsi->tsi_reply_fail_id)) {
1356 tsi->tsi_reply_fail_id = OBD_FAIL_MDS_LDLM_REPLY_NET;
1359 tsi->tsi_reply_fail_id = OBD_FAIL_OST_LDLM_REPLY_NET;
1362 tsi->tsi_reply_fail_id = OBD_FAIL_MGS_LDLM_REPLY_NET;
1365 tsi->tsi_reply_fail_id = OBD_FAIL_LDLM_REPLY;
1368 RETURN(req->rq_status);
1370 EXPORT_SYMBOL(tgt_enqueue);
1372 int tgt_convert(struct tgt_session_info *tsi)
1374 struct ptlrpc_request *req = tgt_ses_req(tsi);
1378 LASSERT(tsi->tsi_dlm_req);
1379 rc = ldlm_handle_convert0(req, tsi->tsi_dlm_req);
1381 RETURN(err_serious(rc));
1383 RETURN(req->rq_status);
1386 int tgt_bl_callback(struct tgt_session_info *tsi)
1388 return err_serious(-EOPNOTSUPP);
1391 int tgt_cp_callback(struct tgt_session_info *tsi)
1393 return err_serious(-EOPNOTSUPP);
1396 /* generic LDLM target handler */
1397 struct tgt_handler tgt_dlm_handlers[] = {
1398 TGT_DLM_HDL(HAS_KEY, LDLM_ENQUEUE, tgt_enqueue),
1399 TGT_DLM_HDL(HAS_KEY, LDLM_CONVERT, tgt_convert),
1400 TGT_DLM_HDL_VAR(0, LDLM_BL_CALLBACK, tgt_bl_callback),
1401 TGT_DLM_HDL_VAR(0, LDLM_CP_CALLBACK, tgt_cp_callback)
1403 EXPORT_SYMBOL(tgt_dlm_handlers);
1406 * Unified target LLOG handlers.
1408 int tgt_llog_open(struct tgt_session_info *tsi)
1414 rc = llog_origin_handle_open(tgt_ses_req(tsi));
1418 EXPORT_SYMBOL(tgt_llog_open);
1420 int tgt_llog_read_header(struct tgt_session_info *tsi)
1426 rc = llog_origin_handle_read_header(tgt_ses_req(tsi));
1430 EXPORT_SYMBOL(tgt_llog_read_header);
1432 int tgt_llog_next_block(struct tgt_session_info *tsi)
1438 rc = llog_origin_handle_next_block(tgt_ses_req(tsi));
1442 EXPORT_SYMBOL(tgt_llog_next_block);
1444 int tgt_llog_prev_block(struct tgt_session_info *tsi)
1450 rc = llog_origin_handle_prev_block(tgt_ses_req(tsi));
1454 EXPORT_SYMBOL(tgt_llog_prev_block);
1456 /* generic llog target handler */
1457 struct tgt_handler tgt_llog_handlers[] = {
1458 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_CREATE, tgt_llog_open),
1459 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_NEXT_BLOCK, tgt_llog_next_block),
1460 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_READ_HEADER, tgt_llog_read_header),
1461 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_PREV_BLOCK, tgt_llog_prev_block),
1463 EXPORT_SYMBOL(tgt_llog_handlers);
1466 * sec context handlers
1468 /* XXX: Implement based on mdt_sec_ctx_handle()? */
1469 static int tgt_sec_ctx_handle(struct tgt_session_info *tsi)
1474 struct tgt_handler tgt_sec_ctx_handlers[] = {
1475 TGT_SEC_HDL_VAR(0, SEC_CTX_INIT, tgt_sec_ctx_handle),
1476 TGT_SEC_HDL_VAR(0, SEC_CTX_INIT_CONT, tgt_sec_ctx_handle),
1477 TGT_SEC_HDL_VAR(0, SEC_CTX_FINI, tgt_sec_ctx_handle),
1479 EXPORT_SYMBOL(tgt_sec_ctx_handlers);
1481 int (*tgt_lfsck_in_notify_local)(const struct lu_env *env,
1482 struct dt_device *key,
1483 struct lfsck_req_local *lrl,
1484 struct thandle *th) = NULL;
1486 void tgt_register_lfsck_in_notify_local(int (*notify)(const struct lu_env *,
1488 struct lfsck_req_local *,
1491 tgt_lfsck_in_notify_local = notify;
1493 EXPORT_SYMBOL(tgt_register_lfsck_in_notify_local);
1495 int (*tgt_lfsck_in_notify)(const struct lu_env *env,
1496 struct dt_device *key,
1497 struct lfsck_request *lr) = NULL;
1499 void tgt_register_lfsck_in_notify(int (*notify)(const struct lu_env *,
1501 struct lfsck_request *))
1503 tgt_lfsck_in_notify = notify;
1505 EXPORT_SYMBOL(tgt_register_lfsck_in_notify);
1507 static int (*tgt_lfsck_query)(const struct lu_env *env,
1508 struct dt_device *key,
1509 struct lfsck_request *req,
1510 struct lfsck_reply *rep,
1511 struct lfsck_query *que) = NULL;
1513 void tgt_register_lfsck_query(int (*query)(const struct lu_env *,
1515 struct lfsck_request *,
1516 struct lfsck_reply *,
1517 struct lfsck_query *))
1519 tgt_lfsck_query = query;
1521 EXPORT_SYMBOL(tgt_register_lfsck_query);
1523 /* LFSCK request handlers */
1524 static int tgt_handle_lfsck_notify(struct tgt_session_info *tsi)
1526 const struct lu_env *env = tsi->tsi_env;
1527 struct dt_device *key = tsi->tsi_tgt->lut_bottom;
1528 struct lfsck_request *lr;
1532 lr = req_capsule_client_get(tsi->tsi_pill, &RMF_LFSCK_REQUEST);
1536 rc = tgt_lfsck_in_notify(env, key, lr);
1541 static int tgt_handle_lfsck_query(struct tgt_session_info *tsi)
1543 struct lfsck_request *request;
1544 struct lfsck_reply *reply;
1548 request = req_capsule_client_get(tsi->tsi_pill, &RMF_LFSCK_REQUEST);
1549 if (request == NULL)
1552 reply = req_capsule_server_get(tsi->tsi_pill, &RMF_LFSCK_REPLY);
1556 rc = tgt_lfsck_query(tsi->tsi_env, tsi->tsi_tgt->lut_bottom,
1557 request, reply, NULL);
1559 RETURN(rc < 0 ? rc : 0);
1562 struct tgt_handler tgt_lfsck_handlers[] = {
1563 TGT_LFSCK_HDL(HAS_REPLY, LFSCK_NOTIFY, tgt_handle_lfsck_notify),
1564 TGT_LFSCK_HDL(HAS_REPLY, LFSCK_QUERY, tgt_handle_lfsck_query),
1566 EXPORT_SYMBOL(tgt_lfsck_handlers);
1569 * initialize per-thread page pool (bug 5137).
1571 int tgt_io_thread_init(struct ptlrpc_thread *thread)
1573 struct tgt_thread_big_cache *tbc;
1577 LASSERT(thread != NULL);
1578 LASSERT(thread->t_data == NULL);
1580 OBD_ALLOC_LARGE(tbc, sizeof(*tbc));
1583 thread->t_data = tbc;
1586 EXPORT_SYMBOL(tgt_io_thread_init);
1589 * free per-thread pool created by tgt_thread_init().
1591 void tgt_io_thread_done(struct ptlrpc_thread *thread)
1593 struct tgt_thread_big_cache *tbc;
1597 LASSERT(thread != NULL);
1600 * be prepared to handle partially-initialized pools (because this is
1601 * called from ost_io_thread_init() for cleanup.
1603 tbc = thread->t_data;
1605 OBD_FREE_LARGE(tbc, sizeof(*tbc));
1606 thread->t_data = NULL;
1610 EXPORT_SYMBOL(tgt_io_thread_done);
1613 * Helper function for getting Data-on-MDT file server DLM lock
1614 * if asked by client.
1616 int tgt_mdt_data_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
1617 struct lustre_handle *lh, int mode, __u64 *flags)
1619 union ldlm_policy_data policy = {
1620 .l_inodebits.bits = MDS_INODELOCK_DOM,
1626 LASSERT(lh != NULL);
1627 LASSERT(ns != NULL);
1628 LASSERT(!lustre_handle_is_used(lh));
1630 rc = ldlm_cli_enqueue_local(NULL, ns, res_id, LDLM_IBITS, &policy, mode,
1631 flags, ldlm_blocking_ast,
1632 ldlm_completion_ast, ldlm_glimpse_ast,
1633 NULL, 0, LVB_T_NONE, NULL, lh);
1635 RETURN(rc == ELDLM_OK ? 0 : -EIO);
1637 EXPORT_SYMBOL(tgt_mdt_data_lock);
1639 void tgt_mdt_data_unlock(struct lustre_handle *lh, enum ldlm_mode mode)
1641 LASSERT(lustre_handle_is_used(lh));
1642 ldlm_lock_decref(lh, mode);
1644 EXPORT_SYMBOL(tgt_mdt_data_unlock);
1647 * Helper function for getting server side [start, start+count] DLM lock
1648 * if asked by client.
1650 int tgt_extent_lock(const struct lu_env *env, struct ldlm_namespace *ns,
1651 struct ldlm_res_id *res_id, __u64 start, __u64 end,
1652 struct lustre_handle *lh, int mode, __u64 *flags)
1654 union ldlm_policy_data policy;
1659 LASSERT(lh != NULL);
1660 LASSERT(ns != NULL);
1661 LASSERT(!lustre_handle_is_used(lh));
1663 policy.l_extent.gid = 0;
1664 policy.l_extent.start = start & PAGE_MASK;
1667 * If ->o_blocks is EOF it means "lock till the end of the file".
1668 * Otherwise, it's size of an extent or hole being punched (in bytes).
1670 if (end == OBD_OBJECT_EOF || end < start)
1671 policy.l_extent.end = OBD_OBJECT_EOF;
1673 policy.l_extent.end = end | ~PAGE_MASK;
1675 rc = ldlm_cli_enqueue_local(env, ns, res_id, LDLM_EXTENT, &policy,
1676 mode, flags, ldlm_blocking_ast,
1677 ldlm_completion_ast, ldlm_glimpse_ast,
1678 NULL, 0, LVB_T_NONE, NULL, lh);
1679 RETURN(rc == ELDLM_OK ? 0 : -EIO);
1681 EXPORT_SYMBOL(tgt_extent_lock);
1683 void tgt_extent_unlock(struct lustre_handle *lh, enum ldlm_mode mode)
1685 LASSERT(lustre_handle_is_used(lh));
1686 ldlm_lock_decref(lh, mode);
1688 EXPORT_SYMBOL(tgt_extent_unlock);
1690 static int tgt_brw_lock(const struct lu_env *env, struct obd_export *exp,
1691 struct ldlm_res_id *res_id, struct obd_ioobj *obj,
1692 struct niobuf_remote *nb, struct lustre_handle *lh,
1693 enum ldlm_mode mode)
1695 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
1697 int nrbufs = obj->ioo_bufcnt;
1703 LASSERT(mode == LCK_PR || mode == LCK_PW);
1704 LASSERT(!lustre_handle_is_used(lh));
1706 if (ns->ns_obd->obd_recovering)
1709 if (nrbufs == 0 || !(nb[0].rnb_flags & OBD_BRW_SRVLOCK))
1712 for (i = 1; i < nrbufs; i++)
1713 if (!(nb[i].rnb_flags & OBD_BRW_SRVLOCK))
1716 /* MDT IO for data-on-mdt */
1717 if (exp->exp_connect_data.ocd_connect_flags & OBD_CONNECT_IBITS)
1718 rc = tgt_mdt_data_lock(ns, res_id, lh, mode, &flags);
1720 rc = tgt_extent_lock(env, ns, res_id, nb[0].rnb_offset,
1721 nb[nrbufs - 1].rnb_offset +
1722 nb[nrbufs - 1].rnb_len - 1,
1727 static void tgt_brw_unlock(struct obd_ioobj *obj, struct niobuf_remote *niob,
1728 struct lustre_handle *lh, enum ldlm_mode mode)
1732 LASSERT(mode == LCK_PR || mode == LCK_PW);
1733 LASSERT((obj->ioo_bufcnt > 0 &&
1734 (niob[0].rnb_flags & OBD_BRW_SRVLOCK)) ==
1735 lustre_handle_is_used(lh));
1737 if (lustre_handle_is_used(lh))
1738 tgt_extent_unlock(lh, mode);
1741 static int tgt_checksum_niobuf(struct lu_target *tgt,
1742 struct niobuf_local *local_nb, int npages,
1743 int opc, enum cksum_types cksum_type,
1746 struct ahash_request *req;
1747 unsigned int bufsize;
1749 unsigned char cfs_alg = cksum_obd2cfs(cksum_type);
1751 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1753 CERROR("%s: unable to initialize checksum hash %s\n",
1754 tgt_name(tgt), cfs_crypto_hash_name(cfs_alg));
1755 return PTR_ERR(req);
1758 CDEBUG(D_INFO, "Checksum for algo %s\n", cfs_crypto_hash_name(cfs_alg));
1759 for (i = 0; i < npages; i++) {
1760 /* corrupt the data before we compute the checksum, to
1761 * simulate a client->OST data error */
1762 if (i == 0 && opc == OST_WRITE &&
1763 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) {
1764 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
1765 int len = local_nb[i].lnb_len;
1766 struct page *np = tgt_page_to_corrupt;
1769 char *ptr = ll_kmap_atomic(local_nb[i].lnb_page,
1771 char *ptr2 = page_address(np);
1773 memcpy(ptr2 + off, ptr + off, len);
1774 memcpy(ptr2 + off, "bad3", min(4, len));
1775 ll_kunmap_atomic(ptr, KM_USER0);
1777 /* LU-8376 to preserve original index for
1778 * display in dump_all_bulk_pages() */
1781 cfs_crypto_hash_update_page(req, np, off,
1785 CERROR("%s: can't alloc page for corruption\n",
1789 cfs_crypto_hash_update_page(req, local_nb[i].lnb_page,
1790 local_nb[i].lnb_page_offset & ~PAGE_MASK,
1791 local_nb[i].lnb_len);
1793 /* corrupt the data after we compute the checksum, to
1794 * simulate an OST->client data error */
1795 if (i == 0 && opc == OST_READ &&
1796 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND)) {
1797 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
1798 int len = local_nb[i].lnb_len;
1799 struct page *np = tgt_page_to_corrupt;
1802 char *ptr = ll_kmap_atomic(local_nb[i].lnb_page,
1804 char *ptr2 = page_address(np);
1806 memcpy(ptr2 + off, ptr + off, len);
1807 memcpy(ptr2 + off, "bad4", min(4, len));
1808 ll_kunmap_atomic(ptr, KM_USER0);
1810 /* LU-8376 to preserve original index for
1811 * display in dump_all_bulk_pages() */
1814 cfs_crypto_hash_update_page(req, np, off,
1818 CERROR("%s: can't alloc page for corruption\n",
1824 bufsize = sizeof(*cksum);
1825 err = cfs_crypto_hash_final(req, (unsigned char *)cksum, &bufsize);
1830 char dbgcksum_file_name[PATH_MAX];
1832 static void dump_all_bulk_pages(struct obdo *oa, int count,
1833 struct niobuf_local *local_nb,
1834 __u32 server_cksum, __u32 client_cksum)
1841 /* will only keep dump of pages on first error for the same range in
1842 * file/fid, not during the resends/retries. */
1843 snprintf(dbgcksum_file_name, sizeof(dbgcksum_file_name),
1844 "%s-checksum_dump-ost-"DFID":[%llu-%llu]-%x-%x",
1845 (strncmp(libcfs_debug_file_path_arr, "NONE", 4) != 0 ?
1846 libcfs_debug_file_path_arr :
1847 LIBCFS_DEBUG_FILE_PATH_DEFAULT),
1848 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1849 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1850 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1851 local_nb[0].lnb_file_offset,
1852 local_nb[count-1].lnb_file_offset +
1853 local_nb[count-1].lnb_len - 1, client_cksum, server_cksum);
1854 filp = filp_open(dbgcksum_file_name,
1855 O_CREAT | O_EXCL | O_WRONLY | O_LARGEFILE, 0600);
1859 CDEBUG(D_INFO, "%s: can't open to dump pages with "
1860 "checksum error: rc = %d\n", dbgcksum_file_name,
1863 CERROR("%s: can't open to dump pages with checksum "
1864 "error: rc = %d\n", dbgcksum_file_name, rc);
1868 for (i = 0; i < count; i++) {
1869 len = local_nb[i].lnb_len;
1870 buf = kmap(local_nb[i].lnb_page);
1872 rc = cfs_kernel_write(filp, buf, len, &filp->f_pos);
1874 CERROR("%s: wanted to write %u but got %d "
1875 "error\n", dbgcksum_file_name, len, rc);
1880 CDEBUG(D_INFO, "%s: wrote %d bytes\n",
1881 dbgcksum_file_name, rc);
1883 kunmap(local_nb[i].lnb_page);
1886 rc = vfs_fsync_range(filp, 0, LLONG_MAX, 1);
1888 CERROR("%s: sync returns %d\n", dbgcksum_file_name, rc);
1889 filp_close(filp, NULL);
1892 static int check_read_checksum(struct niobuf_local *local_nb, int npages,
1893 struct obd_export *exp, struct obdo *oa,
1894 const struct lnet_process_id *peer,
1895 __u32 client_cksum, __u32 server_cksum,
1896 enum cksum_types server_cksum_type)
1899 enum cksum_types cksum_type;
1902 /* unlikely to happen and only if resend does not occur due to cksum
1903 * control failure on Client */
1904 if (unlikely(server_cksum == client_cksum)) {
1905 CDEBUG(D_PAGE, "checksum %x confirmed upon retry\n",
1910 if (exp->exp_obd->obd_checksum_dump)
1911 dump_all_bulk_pages(oa, npages, local_nb, server_cksum,
1914 cksum_type = obd_cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1917 if (cksum_type != server_cksum_type)
1918 msg = "the server may have not used the checksum type specified"
1919 " in the original request - likely a protocol problem";
1921 msg = "should have changed on the client or in transit";
1923 start = local_nb[0].lnb_file_offset;
1924 end = local_nb[npages-1].lnb_file_offset +
1925 local_nb[npages-1].lnb_len - 1;
1927 LCONSOLE_ERROR_MSG(0x132, "%s: BAD READ CHECKSUM: %s: from %s inode "
1928 DFID " object "DOSTID" extent [%llu-%llu], client returned csum"
1929 " %x (type %x), server csum %x (type %x)\n",
1930 exp->exp_obd->obd_name,
1931 msg, libcfs_nid2str(peer->nid),
1932 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : 0ULL,
1933 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1934 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1936 start, end, client_cksum, cksum_type, server_cksum,
1942 static int tgt_pages2shortio(struct niobuf_local *local, int npages,
1943 unsigned char *buf, int size)
1945 int i, off, len, copied = size;
1948 for (i = 0; i < npages; i++) {
1949 off = local[i].lnb_page_offset & ~PAGE_MASK;
1950 len = local[i].lnb_len;
1952 CDEBUG(D_PAGE, "index %d offset = %d len = %d left = %d\n",
1957 ptr = ll_kmap_atomic(local[i].lnb_page, KM_USER0);
1958 memcpy(buf + off, ptr, len);
1959 ll_kunmap_atomic(ptr, KM_USER0);
1963 return copied - size;
1966 static int tgt_checksum_niobuf_t10pi(struct lu_target *tgt,
1967 struct niobuf_local *local_nb,
1968 int npages, int opc,
1969 obd_dif_csum_fn *fn,
1973 enum cksum_types t10_cksum_type = tgt->lut_dt_conf.ddp_t10_cksum_type;
1974 unsigned char cfs_alg = cksum_obd2cfs(OBD_CKSUM_T10_TOP);
1975 const char *obd_name = tgt->lut_obd->obd_name;
1976 struct ahash_request *req;
1977 unsigned int bufsize;
1978 unsigned char *buffer;
1979 struct page *__page;
1982 int used_number = 0;
1988 __page = alloc_page(GFP_KERNEL);
1992 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1994 CERROR("%s: unable to initialize checksum hash %s\n",
1995 tgt_name(tgt), cfs_crypto_hash_name(cfs_alg));
1996 return PTR_ERR(req);
1999 buffer = kmap(__page);
2000 guard_start = (__u16 *)buffer;
2001 guard_number = PAGE_SIZE / sizeof(*guard_start);
2002 for (i = 0; i < npages; i++) {
2003 /* corrupt the data before we compute the checksum, to
2004 * simulate a client->OST data error */
2005 if (i == 0 && opc == OST_WRITE &&
2006 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) {
2007 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
2008 int len = local_nb[i].lnb_len;
2009 struct page *np = tgt_page_to_corrupt;
2012 char *ptr = ll_kmap_atomic(local_nb[i].lnb_page,
2014 char *ptr2 = page_address(np);
2016 memcpy(ptr2 + off, ptr + off, len);
2017 memcpy(ptr2 + off, "bad3", min(4, len));
2018 ll_kunmap_atomic(ptr, KM_USER0);
2020 /* LU-8376 to preserve original index for
2021 * display in dump_all_bulk_pages() */
2024 cfs_crypto_hash_update_page(req, np, off,
2028 CERROR("%s: can't alloc page for corruption\n",
2034 * The left guard number should be able to hold checksums of a
2037 if (t10_cksum_type && opc == OST_READ &&
2038 local_nb[i].lnb_guard_disk) {
2039 used = DIV_ROUND_UP(local_nb[i].lnb_len, sector_size);
2040 if (used > (guard_number - used_number)) {
2044 memcpy(guard_start + used_number,
2045 local_nb[i].lnb_guards,
2046 used * sizeof(*local_nb[i].lnb_guards));
2048 rc = obd_page_dif_generate_buffer(obd_name,
2049 local_nb[i].lnb_page,
2050 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2051 local_nb[i].lnb_len, guard_start + used_number,
2052 guard_number - used_number, &used, sector_size,
2058 LASSERT(used <= MAX_GUARD_NUMBER);
2060 * If disk support T10PI checksum, copy guards to local_nb.
2061 * If the write is partial page, do not use the guards for bio
2062 * submission since the data might not be full-sector. The bio
2063 * guards will be generated later based on the full sectors. If
2064 * the sector size is 512B rather than 4 KB, or the page size
2065 * is larger than 4KB, this might drop some useful guards for
2066 * partial page write, but it will only add minimal extra time
2067 * of checksum calculation.
2069 if (t10_cksum_type && opc == OST_WRITE &&
2070 local_nb[i].lnb_len == PAGE_SIZE) {
2071 local_nb[i].lnb_guard_rpc = 1;
2072 memcpy(local_nb[i].lnb_guards,
2073 guard_start + used_number,
2074 used * sizeof(*local_nb[i].lnb_guards));
2077 used_number += used;
2078 if (used_number == guard_number) {
2079 cfs_crypto_hash_update_page(req, __page, 0,
2080 used_number * sizeof(*guard_start));
2084 /* corrupt the data after we compute the checksum, to
2085 * simulate an OST->client data error */
2086 if (unlikely(i == 0 && opc == OST_READ &&
2087 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND))) {
2088 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
2089 int len = local_nb[i].lnb_len;
2090 struct page *np = tgt_page_to_corrupt;
2093 char *ptr = ll_kmap_atomic(local_nb[i].lnb_page,
2095 char *ptr2 = page_address(np);
2097 memcpy(ptr2 + off, ptr + off, len);
2098 memcpy(ptr2 + off, "bad4", min(4, len));
2099 ll_kunmap_atomic(ptr, KM_USER0);
2101 /* LU-8376 to preserve original index for
2102 * display in dump_all_bulk_pages() */
2105 cfs_crypto_hash_update_page(req, np, off,
2109 CERROR("%s: can't alloc page for corruption\n",
2118 if (used_number != 0)
2119 cfs_crypto_hash_update_page(req, __page, 0,
2120 used_number * sizeof(*guard_start));
2122 bufsize = sizeof(cksum);
2123 rc = cfs_crypto_hash_final(req, (unsigned char *)&cksum, &bufsize);
2128 __free_page(__page);
2132 static int tgt_checksum_niobuf_rw(struct lu_target *tgt,
2133 enum cksum_types cksum_type,
2134 struct niobuf_local *local_nb,
2135 int npages, int opc, u32 *check_sum)
2137 obd_dif_csum_fn *fn = NULL;
2138 int sector_size = 0;
2142 obd_t10_cksum2dif(cksum_type, &fn, §or_size);
2145 rc = tgt_checksum_niobuf_t10pi(tgt, local_nb, npages,
2146 opc, fn, sector_size,
2149 rc = tgt_checksum_niobuf(tgt, local_nb, npages, opc,
2150 cksum_type, check_sum);
2154 int tgt_brw_read(struct tgt_session_info *tsi)
2156 struct ptlrpc_request *req = tgt_ses_req(tsi);
2157 struct ptlrpc_bulk_desc *desc = NULL;
2158 struct obd_export *exp = tsi->tsi_exp;
2159 struct niobuf_remote *remote_nb;
2160 struct niobuf_local *local_nb;
2161 struct obd_ioobj *ioo;
2162 struct ost_body *body, *repbody;
2163 struct lustre_handle lockh = { 0 };
2164 int npages, nob = 0, rc, i, no_reply = 0,
2166 struct tgt_thread_big_cache *tbc = req->rq_svc_thread->t_data;
2167 const char *obd_name = exp->exp_obd->obd_name;
2171 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL &&
2172 ptlrpc_req2svc(req)->srv_req_portal != MDS_IO_PORTAL) {
2173 CERROR("%s: deny read request from %s to portal %u\n",
2174 tgt_name(tsi->tsi_tgt),
2175 obd_export_nid2str(req->rq_export),
2176 ptlrpc_req2svc(req)->srv_req_portal);
2180 req->rq_bulk_read = 1;
2182 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_READ_BULK))
2185 OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, cfs_fail_val > 0 ?
2186 cfs_fail_val : (obd_timeout + 1) / 4);
2188 /* Check if there is eviction in progress, and if so, wait for it to
2190 if (unlikely(atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
2191 /* We do not care how long it takes */
2193 exp->exp_obd->obd_evict_inprogress_waitq,
2194 !atomic_read(&exp->exp_obd->obd_evict_inprogress));
2197 /* There must be big cache in current thread to process this request
2198 * if it is NULL then something went wrong and it wasn't allocated,
2199 * report -ENOMEM in that case */
2203 body = tsi->tsi_ost_body;
2204 LASSERT(body != NULL);
2206 ioo = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_IOOBJ);
2207 LASSERT(ioo != NULL); /* must exists after tgt_ost_body_unpack */
2209 remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
2210 LASSERT(remote_nb != NULL); /* must exists after tgt_ost_body_unpack */
2212 local_nb = tbc->local;
2214 rc = tgt_brw_lock(tsi->tsi_env, exp, &tsi->tsi_resid, ioo, remote_nb,
2220 * If getting the lock took more time than
2221 * client was willing to wait, drop it. b=11330
2223 if (ktime_get_real_seconds() > req->rq_deadline ||
2224 OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
2226 CERROR("Dropping timed-out read from %s because locking object " DOSTID " took %lld seconds (limit was %lld).\n",
2227 libcfs_id2str(req->rq_peer), POSTID(&ioo->ioo_oid),
2228 ktime_get_real_seconds() - req->rq_arrival_time.tv_sec,
2229 req->rq_deadline - req->rq_arrival_time.tv_sec);
2230 GOTO(out_lock, rc = -ETIMEDOUT);
2233 repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
2234 repbody->oa = body->oa;
2236 npages = PTLRPC_MAX_BRW_PAGES;
2237 rc = obd_preprw(tsi->tsi_env, OBD_BRW_READ, exp, &repbody->oa, 1,
2238 ioo, remote_nb, &npages, local_nb);
2242 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2243 body->oa.o_flags & OBD_FL_SHORT_IO) {
2246 desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
2247 PTLRPC_BULK_PUT_SOURCE |
2248 PTLRPC_BULK_BUF_KIOV,
2250 &ptlrpc_bulk_kiov_nopin_ops);
2252 GOTO(out_commitrw, rc = -ENOMEM);
2256 npages_read = npages;
2257 for (i = 0; i < npages; i++) {
2258 int page_rc = local_nb[i].lnb_rc;
2267 if (page_rc != 0 && desc != NULL) { /* some data! */
2268 LASSERT(local_nb[i].lnb_page != NULL);
2269 desc->bd_frag_ops->add_kiov_frag
2270 (desc, local_nb[i].lnb_page,
2271 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2275 if (page_rc != local_nb[i].lnb_len) { /* short read */
2276 local_nb[i].lnb_len = page_rc;
2277 npages_read = i + (page_rc != 0 ? 1 : 0);
2278 /* All subsequent pages should be 0 */
2279 while (++i < npages)
2280 LASSERT(local_nb[i].lnb_rc == 0);
2284 if (OBD_FAIL_CHECK(OBD_FAIL_OST_READ_SIZE) &&
2285 nob != cfs_fail_val)
2288 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
2289 u32 flag = body->oa.o_valid & OBD_MD_FLFLAGS ?
2290 body->oa.o_flags : 0;
2291 enum cksum_types cksum_type = obd_cksum_type_unpack(flag);
2293 repbody->oa.o_flags = obd_cksum_type_pack(obd_name,
2295 repbody->oa.o_valid = OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
2297 rc = tgt_checksum_niobuf_rw(tsi->tsi_tgt, cksum_type,
2298 local_nb, npages_read, OST_READ,
2299 &repbody->oa.o_cksum);
2301 GOTO(out_commitrw, rc);
2302 CDEBUG(D_PAGE, "checksum at read origin: %x\n",
2303 repbody->oa.o_cksum);
2305 /* if a resend it could be for a cksum error, so check Server
2306 * cksum with returned Client cksum (this should even cover
2307 * zero-cksum case) */
2308 if ((body->oa.o_valid & OBD_MD_FLFLAGS) &&
2309 (body->oa.o_flags & OBD_FL_RECOV_RESEND))
2310 check_read_checksum(local_nb, npages_read, exp,
2311 &body->oa, &req->rq_peer,
2313 repbody->oa.o_cksum, cksum_type);
2315 repbody->oa.o_valid = 0;
2317 /* We're finishing using body->oa as an input variable */
2319 /* Check if client was evicted while we were doing i/o before touching
2322 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2323 body->oa.o_flags & OBD_FL_SHORT_IO) {
2324 unsigned char *short_io_buf;
2327 short_io_buf = req_capsule_server_get(&req->rq_pill,
2329 short_io_size = req_capsule_get_size(&req->rq_pill,
2332 rc = tgt_pages2shortio(local_nb, npages_read,
2333 short_io_buf, short_io_size);
2335 req_capsule_shrink(&req->rq_pill,
2338 rc = rc > 0 ? 0 : rc;
2339 } else if (!CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)) {
2340 rc = target_bulk_io(exp, desc);
2344 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2345 body->oa.o_flags & OBD_FL_SHORT_IO)
2346 req_capsule_shrink(&req->rq_pill, &RMF_SHORT_IO, 0,
2351 /* Must commit after prep above in all cases */
2352 rc = obd_commitrw(tsi->tsi_env, OBD_BRW_READ, exp, &repbody->oa, 1, ioo,
2353 remote_nb, npages, local_nb, rc);
2355 tgt_brw_unlock(ioo, remote_nb, &lockh, LCK_PR);
2357 if (desc && !CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2))
2358 ptlrpc_free_bulk(desc);
2363 ptlrpc_lprocfs_brw(req, nob);
2364 } else if (no_reply) {
2365 req->rq_no_reply = 1;
2366 /* reply out callback would free */
2367 ptlrpc_req_drop_rs(req);
2368 LCONSOLE_WARN("%s: Bulk IO read error with %s (at %s), "
2369 "client will retry: rc %d\n",
2371 obd_uuid2str(&exp->exp_client_uuid),
2372 obd_export_nid2str(exp), rc);
2374 /* send a bulk after reply to simulate a network delay or reordering
2375 * by a router - Note that !desc implies short io, so there is no bulk
2377 if (unlikely(CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)) &&
2379 CDEBUG(D_INFO, "reorder BULK\n");
2382 target_bulk_io(exp, desc);
2383 ptlrpc_free_bulk(desc);
2388 EXPORT_SYMBOL(tgt_brw_read);
2390 static int tgt_shortio2pages(struct niobuf_local *local, int npages,
2391 unsigned char *buf, unsigned int size)
2396 for (i = 0; i < npages; i++) {
2397 off = local[i].lnb_page_offset & ~PAGE_MASK;
2398 len = local[i].lnb_len;
2403 CDEBUG(D_PAGE, "index %d offset = %d len = %d left = %d\n",
2405 ptr = ll_kmap_atomic(local[i].lnb_page, KM_USER0);
2408 memcpy(ptr + off, buf, len < size ? len : size);
2409 ll_kunmap_atomic(ptr, KM_USER0);
2416 static void tgt_warn_on_cksum(struct ptlrpc_request *req,
2417 struct ptlrpc_bulk_desc *desc,
2418 struct niobuf_local *local_nb, int npages,
2419 u32 client_cksum, u32 server_cksum,
2422 struct obd_export *exp = req->rq_export;
2423 struct ost_body *body;
2427 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2428 LASSERT(body != NULL);
2430 if (desc && req->rq_peer.nid != desc->bd_sender) {
2432 router = libcfs_nid2str(desc->bd_sender);
2435 if (exp->exp_obd->obd_checksum_dump)
2436 dump_all_bulk_pages(&body->oa, npages, local_nb, server_cksum,
2440 CDEBUG_LIMIT(D_INFO, "client csum %x, server csum %x\n",
2441 client_cksum, server_cksum);
2445 LCONSOLE_ERROR_MSG(0x168, "%s: BAD WRITE CHECKSUM: from %s%s%s inode "
2446 DFID" object "DOSTID" extent [%llu-%llu"
2447 "]: client csum %x, server csum %x\n",
2448 exp->exp_obd->obd_name, libcfs_id2str(req->rq_peer),
2450 body->oa.o_valid & OBD_MD_FLFID ?
2451 body->oa.o_parent_seq : (__u64)0,
2452 body->oa.o_valid & OBD_MD_FLFID ?
2453 body->oa.o_parent_oid : 0,
2454 body->oa.o_valid & OBD_MD_FLFID ?
2455 body->oa.o_parent_ver : 0,
2456 POSTID(&body->oa.o_oi),
2457 local_nb[0].lnb_file_offset,
2458 local_nb[npages-1].lnb_file_offset +
2459 local_nb[npages - 1].lnb_len - 1,
2460 client_cksum, server_cksum);
2463 int tgt_brw_write(struct tgt_session_info *tsi)
2465 struct ptlrpc_request *req = tgt_ses_req(tsi);
2466 struct ptlrpc_bulk_desc *desc = NULL;
2467 struct obd_export *exp = req->rq_export;
2468 struct niobuf_remote *remote_nb;
2469 struct niobuf_local *local_nb;
2470 struct obd_ioobj *ioo;
2471 struct ost_body *body, *repbody;
2472 struct lustre_handle lockh = {0};
2474 int objcount, niocount, npages;
2476 enum cksum_types cksum_type = OBD_CKSUM_CRC32;
2477 bool no_reply = false, mmap;
2478 struct tgt_thread_big_cache *tbc = req->rq_svc_thread->t_data;
2479 bool wait_sync = false;
2480 const char *obd_name = exp->exp_obd->obd_name;
2484 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL &&
2485 ptlrpc_req2svc(req)->srv_req_portal != MDS_IO_PORTAL) {
2486 CERROR("%s: deny write request from %s to portal %u\n",
2487 tgt_name(tsi->tsi_tgt),
2488 obd_export_nid2str(req->rq_export),
2489 ptlrpc_req2svc(req)->srv_req_portal);
2490 RETURN(err_serious(-EPROTO));
2493 if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOSPC))
2494 RETURN(err_serious(-ENOSPC));
2495 if (OBD_FAIL_TIMEOUT(OBD_FAIL_OST_EROFS, 1))
2496 RETURN(err_serious(-EROFS));
2498 req->rq_bulk_write = 1;
2500 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
2501 RETURN(err_serious(-EIO));
2502 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK2))
2503 RETURN(err_serious(-EFAULT));
2505 /* pause before transaction has been started */
2506 CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, cfs_fail_val > 0 ?
2507 cfs_fail_val : (obd_timeout + 1) / 4);
2509 /* Delay write commit to show stale size information */
2510 CFS_FAIL_TIMEOUT(OBD_FAIL_OSC_NO_SIZE_DATA, cfs_fail_val);
2512 /* There must be big cache in current thread to process this request
2513 * if it is NULL then something went wrong and it wasn't allocated,
2514 * report -ENOMEM in that case */
2518 body = tsi->tsi_ost_body;
2519 LASSERT(body != NULL);
2521 ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
2522 LASSERT(ioo != NULL); /* must exists after tgt_ost_body_unpack */
2524 objcount = req_capsule_get_size(&req->rq_pill, &RMF_OBD_IOOBJ,
2525 RCL_CLIENT) / sizeof(*ioo);
2527 for (niocount = i = 0; i < objcount; i++)
2528 niocount += ioo[i].ioo_bufcnt;
2530 remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
2531 LASSERT(remote_nb != NULL); /* must exists after tgt_ost_body_unpack */
2532 if (niocount != req_capsule_get_size(&req->rq_pill,
2533 &RMF_NIOBUF_REMOTE, RCL_CLIENT) /
2535 RETURN(err_serious(-EPROTO));
2537 if ((remote_nb[0].rnb_flags & OBD_BRW_MEMALLOC) &&
2538 ptlrpc_connection_is_local(exp->exp_connection))
2539 memory_pressure_set();
2541 req_capsule_set_size(&req->rq_pill, &RMF_RCS, RCL_SERVER,
2542 niocount * sizeof(*rcs));
2543 rc = req_capsule_server_pack(&req->rq_pill);
2545 GOTO(out, rc = err_serious(rc));
2547 CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_PACK, cfs_fail_val);
2548 rcs = req_capsule_server_get(&req->rq_pill, &RMF_RCS);
2550 local_nb = tbc->local;
2552 rc = tgt_brw_lock(tsi->tsi_env, exp, &tsi->tsi_resid, ioo, remote_nb,
2558 * If getting the lock took more time than
2559 * client was willing to wait, drop it. b=11330
2561 if (ktime_get_real_seconds() > req->rq_deadline ||
2562 OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
2564 CERROR("%s: Dropping timed-out write from %s because locking object " DOSTID " took %lld seconds (limit was %lld).\n",
2565 tgt_name(tsi->tsi_tgt), libcfs_id2str(req->rq_peer),
2566 POSTID(&ioo->ioo_oid),
2567 ktime_get_real_seconds() - req->rq_arrival_time.tv_sec,
2568 req->rq_deadline - req->rq_arrival_time.tv_sec);
2569 GOTO(out_lock, rc = -ETIMEDOUT);
2572 /* Because we already sync grant info with client when reconnect,
2573 * grant info will be cleared for resent req, then fed_grant and
2574 * total_grant will not be modified in following preprw_write */
2575 if (lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY)) {
2576 DEBUG_REQ(D_CACHE, req, "clear resent/replay req grant info");
2577 body->oa.o_valid &= ~OBD_MD_FLGRANT;
2580 repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
2581 if (repbody == NULL)
2582 GOTO(out_lock, rc = -ENOMEM);
2583 repbody->oa = body->oa;
2585 npages = PTLRPC_MAX_BRW_PAGES;
2586 rc = obd_preprw(tsi->tsi_env, OBD_BRW_WRITE, exp, &repbody->oa,
2587 objcount, ioo, remote_nb, &npages, local_nb);
2590 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2591 body->oa.o_flags & OBD_FL_SHORT_IO) {
2592 unsigned int short_io_size;
2593 unsigned char *short_io_buf;
2595 short_io_size = req_capsule_get_size(&req->rq_pill,
2598 short_io_buf = req_capsule_client_get(&req->rq_pill,
2600 CDEBUG(D_INFO, "Client use short io for data transfer,"
2601 " size = %d\n", short_io_size);
2603 /* Copy short io buf to pages */
2604 rc = tgt_shortio2pages(local_nb, npages, short_io_buf,
2608 desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
2609 PTLRPC_BULK_GET_SINK |
2610 PTLRPC_BULK_BUF_KIOV,
2612 &ptlrpc_bulk_kiov_nopin_ops);
2614 GOTO(skip_transfer, rc = -ENOMEM);
2616 /* NB Having prepped, we must commit... */
2617 for (i = 0; i < npages; i++)
2618 desc->bd_frag_ops->add_kiov_frag(desc,
2619 local_nb[i].lnb_page,
2620 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2621 local_nb[i].lnb_len);
2623 rc = sptlrpc_svc_prep_bulk(req, desc);
2625 GOTO(skip_transfer, rc);
2627 rc = target_bulk_io(exp, desc);
2633 if (body->oa.o_valid & OBD_MD_FLCKSUM && rc == 0) {
2634 static int cksum_counter;
2636 if (body->oa.o_valid & OBD_MD_FLFLAGS)
2637 cksum_type = obd_cksum_type_unpack(body->oa.o_flags);
2639 repbody->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
2640 repbody->oa.o_flags &= ~OBD_FL_CKSUM_ALL;
2641 repbody->oa.o_flags |= obd_cksum_type_pack(obd_name,
2644 rc = tgt_checksum_niobuf_rw(tsi->tsi_tgt, cksum_type,
2645 local_nb, npages, OST_WRITE,
2646 &repbody->oa.o_cksum);
2648 GOTO(out_commitrw, rc);
2652 if (unlikely(body->oa.o_cksum != repbody->oa.o_cksum)) {
2653 mmap = (body->oa.o_valid & OBD_MD_FLFLAGS &&
2654 body->oa.o_flags & OBD_FL_MMAP);
2656 tgt_warn_on_cksum(req, desc, local_nb, npages,
2658 repbody->oa.o_cksum, mmap);
2660 } else if ((cksum_counter & (-cksum_counter)) ==
2662 CDEBUG(D_INFO, "Checksum %u from %s OK: %x\n",
2663 cksum_counter, libcfs_id2str(req->rq_peer),
2664 repbody->oa.o_cksum);
2669 /* Must commit after prep above in all cases */
2670 rc = obd_commitrw(tsi->tsi_env, OBD_BRW_WRITE, exp, &repbody->oa,
2671 objcount, ioo, remote_nb, npages, local_nb, rc);
2672 if (rc == -ENOTCONN)
2673 /* quota acquire process has been given up because
2674 * either the client has been evicted or the client
2675 * has timed out the request already */
2678 for (i = 0; i < niocount; i++) {
2679 if (!(local_nb[i].lnb_flags & OBD_BRW_ASYNC)) {
2685 * Disable sending mtime back to the client. If the client locked the
2686 * whole object, then it has already updated the mtime on its side,
2687 * otherwise it will have to glimpse anyway (see bug 21489, comment 32)
2689 repbody->oa.o_valid &= ~(OBD_MD_FLMTIME | OBD_MD_FLATIME);
2694 /* set per-requested niobuf return codes */
2695 for (i = j = 0; i < niocount; i++) {
2696 int len = remote_nb[i].rnb_len;
2701 LASSERT(j < npages);
2702 if (local_nb[j].lnb_rc < 0)
2703 rcs[i] = local_nb[j].lnb_rc;
2704 len -= local_nb[j].lnb_len;
2709 LASSERT(j == npages);
2710 ptlrpc_lprocfs_brw(req, nob);
2713 tgt_brw_unlock(ioo, remote_nb, &lockh, LCK_PW);
2715 ptlrpc_free_bulk(desc);
2717 if (unlikely(no_reply || (exp->exp_obd->obd_no_transno && wait_sync))) {
2718 req->rq_no_reply = 1;
2719 /* reply out callback would free */
2720 ptlrpc_req_drop_rs(req);
2721 if (!exp->exp_obd->obd_no_transno)
2722 LCONSOLE_WARN("%s: Bulk IO write error with %s (at %s),"
2723 " client will retry: rc = %d\n",
2725 obd_uuid2str(&exp->exp_client_uuid),
2726 obd_export_nid2str(exp), rc);
2728 memory_pressure_clr();
2731 EXPORT_SYMBOL(tgt_brw_write);
2733 /* Check if request can be reconstructed from saved reply data
2734 * A copy of the reply data is returned in @trd if the pointer is not NULL
2736 int req_can_reconstruct(struct ptlrpc_request *req,
2737 struct tg_reply_data *trd)
2739 struct tg_export_data *ted = &req->rq_export->exp_target_data;
2740 struct lsd_client_data *lcd = ted->ted_lcd;
2743 if (tgt_is_multimodrpcs_client(req->rq_export))
2744 return tgt_lookup_reply(req, trd);
2746 mutex_lock(&ted->ted_lcd_lock);
2747 found = req->rq_xid == lcd->lcd_last_xid ||
2748 req->rq_xid == lcd->lcd_last_close_xid;
2750 if (found && trd != NULL) {
2751 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE) {
2752 trd->trd_reply.lrd_xid = lcd->lcd_last_close_xid;
2753 trd->trd_reply.lrd_transno =
2754 lcd->lcd_last_close_transno;
2755 trd->trd_reply.lrd_result = lcd->lcd_last_close_result;
2757 trd->trd_reply.lrd_xid = lcd->lcd_last_xid;
2758 trd->trd_reply.lrd_transno = lcd->lcd_last_transno;
2759 trd->trd_reply.lrd_result = lcd->lcd_last_result;
2760 trd->trd_reply.lrd_data = lcd->lcd_last_data;
2761 trd->trd_pre_versions[0] = lcd->lcd_pre_versions[0];
2762 trd->trd_pre_versions[1] = lcd->lcd_pre_versions[1];
2763 trd->trd_pre_versions[2] = lcd->lcd_pre_versions[2];
2764 trd->trd_pre_versions[3] = lcd->lcd_pre_versions[3];
2767 mutex_unlock(&ted->ted_lcd_lock);
2771 EXPORT_SYMBOL(req_can_reconstruct);