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 #include <linux/uidgid.h>
42 #include <obd_class.h>
43 #include <obd_cksum.h>
44 #include <lustre_lfsck.h>
45 #include <lustre_nodemap.h>
46 #include <lustre_acl.h>
48 #include "tgt_internal.h"
50 char *tgt_name(struct lu_target *tgt)
52 LASSERT(tgt->lut_obd != NULL);
53 return tgt->lut_obd->obd_name;
55 EXPORT_SYMBOL(tgt_name);
58 * Generic code handling requests that have struct mdt_body passed in:
60 * - extract mdt_body from request and save it in @tsi, if present;
62 * - create lu_object, corresponding to the fid in mdt_body, and save it in
65 * - if HAS_BODY flag is set for this request type check whether object
66 * actually exists on storage (lu_object_exists()).
69 static int tgt_mdt_body_unpack(struct tgt_session_info *tsi, __u32 flags)
71 const struct mdt_body *body;
72 struct lu_object *obj;
73 struct req_capsule *pill = tsi->tsi_pill;
78 body = req_capsule_client_get(pill, &RMF_MDT_BODY);
82 tsi->tsi_mdt_body = body;
84 if (!(body->mbo_valid & OBD_MD_FLID))
87 /* mdc_pack_body() doesn't check if fid is zero and set OBD_ML_FID
88 * in any case in pre-2.5 clients. Fix that here if needed */
89 if (unlikely(fid_is_zero(&body->mbo_fid1)))
92 if (!fid_is_sane(&body->mbo_fid1)) {
93 CERROR("%s: invalid FID: "DFID"\n", tgt_name(tsi->tsi_tgt),
94 PFID(&body->mbo_fid1));
98 obj = lu_object_find(tsi->tsi_env,
99 &tsi->tsi_tgt->lut_bottom->dd_lu_dev,
100 &body->mbo_fid1, NULL);
102 if ((flags & HAS_BODY) && !lu_object_exists(obj)) {
103 lu_object_put(tsi->tsi_env, obj);
106 tsi->tsi_corpus = obj;
113 tsi->tsi_fid = body->mbo_fid1;
119 * Validate oa from client.
120 * If the request comes from 2.0 clients, currently only RSVD seq and IDIF
122 * a. objects in Single MDT FS seq = FID_SEQ_OST_MDT0, oi_id != 0
123 * b. Echo objects(seq = 2), old echo client still use oi_id/oi_seq to
124 * pack ost_id. Because non-zero oi_seq will make it diffcult to tell
125 * whether this is oi_fid or real ostid. So it will check
126 * OBD_CONNECT_FID, then convert the ostid to FID for old client.
127 * c. Old FID-disable osc will send IDIF.
128 * d. new FID-enable osc/osp will send normal FID.
130 * And also oi_id/f_oid should always start from 1. oi_id/f_oid = 0 will
131 * be used for LAST_ID file, and only being accessed inside OST now.
133 int tgt_validate_obdo(struct tgt_session_info *tsi, struct obdo *oa)
135 struct ost_id *oi = &oa->o_oi;
136 u64 seq = ostid_seq(oi);
137 u64 id = ostid_id(oi);
141 if (unlikely(!(exp_connect_flags(tsi->tsi_exp) & OBD_CONNECT_FID) &&
142 fid_seq_is_echo(seq))) {
143 /* Sigh 2.[123] client still sends echo req with oi_id = 0
144 * during create, and we will reset this to 1, since this
145 * oi_id is basically useless in the following create process,
146 * but oi_id == 0 will make it difficult to tell whether it is
147 * real FID or ost_id. */
148 oi->oi_fid.f_seq = FID_SEQ_ECHO;
149 oi->oi_fid.f_oid = id ?: 1;
150 oi->oi_fid.f_ver = 0;
152 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
154 if (unlikely((oa->o_valid & OBD_MD_FLID) && id == 0))
155 GOTO(out, rc = -EPROTO);
157 /* Note: this check might be forced in 2.5 or 2.6, i.e.
158 * all of the requests are required to setup FLGROUP */
159 if (unlikely(!(oa->o_valid & OBD_MD_FLGROUP))) {
160 ostid_set_seq_mdt0(oi);
161 oa->o_valid |= OBD_MD_FLGROUP;
165 if (unlikely(!(fid_seq_is_idif(seq) || fid_seq_is_mdt0(seq) ||
166 fid_seq_is_norm(seq) || fid_seq_is_echo(seq))))
167 GOTO(out, rc = -EPROTO);
169 rc = ostid_to_fid(&tti->tti_fid1, oi,
170 tsi->tsi_tgt->lut_lsd.lsd_osd_index);
171 if (unlikely(rc != 0))
174 oi->oi_fid = tti->tti_fid1;
180 CERROR("%s: client %s sent bad object "DOSTID": rc = %d\n",
181 tgt_name(tsi->tsi_tgt), obd_export_nid2str(tsi->tsi_exp),
185 EXPORT_SYMBOL(tgt_validate_obdo);
187 static int tgt_io_data_unpack(struct tgt_session_info *tsi, struct ost_id *oi)
190 struct niobuf_remote *rnb;
191 struct obd_ioobj *ioo;
196 ioo = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_IOOBJ);
200 rnb = req_capsule_client_get(tsi->tsi_pill, &RMF_NIOBUF_REMOTE);
204 max_brw = ioobj_max_brw_get(ioo);
205 if (unlikely((max_brw & (max_brw - 1)) != 0)) {
206 CERROR("%s: client %s sent bad ioobj max %u for "DOSTID
207 ": rc = %d\n", tgt_name(tsi->tsi_tgt),
208 obd_export_nid2str(tsi->tsi_exp), max_brw,
209 POSTID(oi), -EPROTO);
214 obj_count = req_capsule_get_size(tsi->tsi_pill, &RMF_OBD_IOOBJ,
215 RCL_CLIENT) / sizeof(*ioo);
216 if (obj_count == 0) {
217 CERROR("%s: short ioobj\n", tgt_name(tsi->tsi_tgt));
219 } else if (obj_count > 1) {
220 CERROR("%s: too many ioobjs (%d)\n", tgt_name(tsi->tsi_tgt),
225 if (ioo->ioo_bufcnt == 0) {
226 CERROR("%s: ioo has zero bufcnt\n", tgt_name(tsi->tsi_tgt));
230 if (ioo->ioo_bufcnt > PTLRPC_MAX_BRW_PAGES) {
231 DEBUG_REQ(D_RPCTRACE, tgt_ses_req(tsi),
232 "bulk has too many pages (%d)",
240 static int tgt_ost_body_unpack(struct tgt_session_info *tsi, __u32 flags)
242 struct ost_body *body;
243 struct req_capsule *pill = tsi->tsi_pill;
244 struct lu_nodemap *nodemap;
249 body = req_capsule_client_get(pill, &RMF_OST_BODY);
253 rc = tgt_validate_obdo(tsi, &body->oa);
257 nodemap = nodemap_get_from_exp(tsi->tsi_exp);
259 RETURN(PTR_ERR(nodemap));
261 body->oa.o_uid = nodemap_map_id(nodemap, NODEMAP_UID,
262 NODEMAP_CLIENT_TO_FS,
264 body->oa.o_gid = nodemap_map_id(nodemap, NODEMAP_GID,
265 NODEMAP_CLIENT_TO_FS,
267 nodemap_putref(nodemap);
269 tsi->tsi_ost_body = body;
270 tsi->tsi_fid = body->oa.o_oi.oi_fid;
272 if (req_capsule_has_field(pill, &RMF_OBD_IOOBJ, RCL_CLIENT)) {
273 rc = tgt_io_data_unpack(tsi, &body->oa.o_oi);
278 if (!(body->oa.o_valid & OBD_MD_FLID)) {
279 if (flags & HAS_BODY) {
280 CERROR("%s: OBD_MD_FLID flag is not set in ost_body but OID/FID is mandatory with HAS_BODY\n",
281 tgt_name(tsi->tsi_tgt));
288 ost_fid_build_resid(&tsi->tsi_fid, &tsi->tsi_resid);
291 * OST doesn't get object in advance for further use to prevent
292 * situations with nested object_find which is potential deadlock.
294 tsi->tsi_corpus = NULL;
299 * Do necessary preprocessing according to handler ->th_flags.
301 static int tgt_request_preprocess(struct tgt_session_info *tsi,
302 struct tgt_handler *h,
303 struct ptlrpc_request *req)
305 struct req_capsule *pill = tsi->tsi_pill;
306 __u32 flags = h->th_flags;
311 if (tsi->tsi_preprocessed)
314 LASSERT(h->th_act != NULL);
315 LASSERT(h->th_opc == lustre_msg_get_opc(req->rq_reqmsg));
316 LASSERT(current->journal_info == NULL);
318 LASSERT(ergo(flags & (HAS_BODY | HAS_REPLY),
320 if (h->th_fmt != NULL) {
321 req_capsule_set(pill, h->th_fmt);
322 if (req_capsule_has_field(pill, &RMF_MDT_BODY, RCL_CLIENT) &&
323 req_capsule_field_present(pill, &RMF_MDT_BODY,
325 rc = tgt_mdt_body_unpack(tsi, flags);
328 } else if (req_capsule_has_field(pill, &RMF_OST_BODY,
330 req_capsule_field_present(pill, &RMF_OST_BODY,
332 rc = tgt_ost_body_unpack(tsi, flags);
338 if (flags & IS_MUTABLE && tgt_conn_flags(tsi) & OBD_CONNECT_RDONLY)
341 if (flags & HAS_KEY) {
342 struct ldlm_request *dlm_req;
344 LASSERT(h->th_fmt != NULL);
346 dlm_req = req_capsule_client_get(pill, &RMF_DLM_REQ);
347 if (dlm_req != NULL) {
348 union ldlm_wire_policy_data *policy =
349 &dlm_req->lock_desc.l_policy_data;
351 if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
353 (policy->l_inodebits.bits |
354 policy->l_inodebits.try_bits) == 0)) {
356 * Lock without inodebits makes no sense and
357 * will oops later in ldlm. If client miss to
358 * set such bits, do not trigger ASSERTION.
360 * For liblustre flock case, it maybe zero.
364 tsi->tsi_dlm_req = dlm_req;
370 tsi->tsi_preprocessed = 1;
375 * Invoke handler for this request opc. Also do necessary preprocessing
376 * (according to handler ->th_flags), and post-processing (setting of
377 * ->last_{xid,committed}).
379 static int tgt_handle_request0(struct tgt_session_info *tsi,
380 struct tgt_handler *h,
381 struct ptlrpc_request *req)
385 __u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
390 /* When dealing with sec context requests, no export is associated yet,
391 * because these requests are sent before *_CONNECT requests.
392 * A NULL req->rq_export means the normal *_common_slice handlers will
393 * not be called, because there is no reference to the target.
394 * So deal with them by hand and jump directly to target_send_reply().
398 case SEC_CTX_INIT_CONT:
400 CFS_FAIL_TIMEOUT(OBD_FAIL_SEC_CTX_HDL_PAUSE, cfs_fail_val);
405 * Checking for various OBD_FAIL_$PREF_$OPC_NET codes. _Do_ not try
406 * to put same checks into handlers like mdt_close(), mdt_reint(),
407 * etc., without talking to mdt authors first. Checking same thing
408 * there again is useless and returning 0 error without packing reply
409 * is buggy! Handlers either pack reply or return error.
411 * We return 0 here and do not send any reply in order to emulate
412 * network failure. Do not send any reply in case any of NET related
413 * fail_id has occured.
415 if (OBD_FAIL_CHECK_ORSET(h->th_fail_id, OBD_FAIL_ONCE))
417 if (unlikely(lustre_msg_get_opc(req->rq_reqmsg) == MDS_REINT &&
418 OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_MULTI_NET)))
421 rc = tgt_request_preprocess(tsi, h, req);
422 /* pack reply if reply format is fixed */
423 if (rc == 0 && h->th_flags & HAS_REPLY) {
425 if (req_capsule_has_field(tsi->tsi_pill, &RMF_MDT_MD,
427 req_capsule_set_size(tsi->tsi_pill, &RMF_MDT_MD,
429 tsi->tsi_mdt_body->mbo_eadatasize);
430 if (req_capsule_has_field(tsi->tsi_pill, &RMF_LOGCOOKIES,
432 req_capsule_set_size(tsi->tsi_pill, &RMF_LOGCOOKIES,
434 if (req_capsule_has_field(tsi->tsi_pill, &RMF_ACL, RCL_SERVER))
435 req_capsule_set_size(tsi->tsi_pill,
436 &RMF_ACL, RCL_SERVER,
437 LUSTRE_POSIX_ACL_MAX_SIZE_OLD);
439 if (req_capsule_has_field(tsi->tsi_pill, &RMF_SHORT_IO,
441 struct niobuf_remote *remote_nb =
442 req_capsule_client_get(tsi->tsi_pill,
444 struct ost_body *body = tsi->tsi_ost_body;
446 req_capsule_set_size(tsi->tsi_pill, &RMF_SHORT_IO,
448 (body->oa.o_valid & OBD_MD_FLFLAGS &&
449 body->oa.o_flags & OBD_FL_SHORT_IO) ?
450 remote_nb[0].rnb_len : 0);
453 rc = req_capsule_server_pack(tsi->tsi_pill);
456 if (likely(rc == 0)) {
458 * Process request, there can be two types of rc:
459 * 1) errors with msg unpack/pack, other failures outside the
460 * operation itself. This is counted as serious errors;
461 * 2) errors during fs operation, should be placed in rq_status
465 if (!is_serious(rc) &&
466 !req->rq_no_reply && req->rq_reply_state == NULL) {
467 DEBUG_REQ(D_ERROR, req,
468 "%s: %s handler did not pack reply but returned no error",
469 tgt_name(tsi->tsi_tgt), h->th_name);
472 serious = is_serious(rc);
473 rc = clear_serious(rc);
481 * ELDLM_* codes which > 0 should be in rq_status only as well as
482 * all non-serious errors.
484 if (rc > 0 || !serious)
487 LASSERT(current->journal_info == NULL);
489 if (likely(rc == 0 && req->rq_export))
490 target_committed_to_req(req);
493 target_send_reply(req, rc, tsi->tsi_reply_fail_id);
497 static int tgt_filter_recovery_request(struct ptlrpc_request *req,
498 struct obd_device *obd, int *process)
500 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
507 case MDS_SYNC: /* used in unmounting */
521 case MDS_HSM_PROGRESS:
522 case MDS_HSM_STATE_SET:
523 case MDS_HSM_REQUEST:
524 *process = target_queue_recovery_request(req, obd);
528 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
535 * Handle recovery. Return:
536 * +1: continue request processing;
537 * -ve: abort immediately with the given error code;
538 * 0: send reply with error code in req->rq_status;
540 static int tgt_handle_recovery(struct ptlrpc_request *req, int reply_fail_id)
544 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
549 case SEC_CTX_INIT_CONT:
554 if (!req->rq_export->exp_obd->obd_replayable)
557 /* sanity check: if the xid matches, the request must be marked as a
558 * resent or replayed */
559 if (req_can_reconstruct(req, NULL) == 1) {
560 if (!(lustre_msg_get_flags(req->rq_reqmsg) &
561 (MSG_RESENT | MSG_REPLAY))) {
562 DEBUG_REQ(D_WARNING, req,
563 "rq_xid=%llu matches saved XID, expected REPLAY or RESENT flag (%x)",
565 lustre_msg_get_flags(req->rq_reqmsg));
566 req->rq_status = -ENOTCONN;
570 /* else: note the opposite is not always true; a RESENT req after a
571 * failover will usually not match the last_xid, since it was likely
572 * never committed. A REPLAYed request will almost never match the
573 * last xid, however it could for a committed, but still retained,
576 /* Check for aborted recovery... */
577 if (unlikely(req->rq_export->exp_obd->obd_recovering)) {
581 DEBUG_REQ(D_INFO, req, "Got new replay");
582 rc = tgt_filter_recovery_request(req, req->rq_export->exp_obd,
584 if (rc != 0 || !should_process)
586 else if (should_process < 0) {
587 req->rq_status = should_process;
588 rc = ptlrpc_error(req);
595 /* Initial check for request, it is validation mostly */
596 static struct tgt_handler *tgt_handler_find_check(struct ptlrpc_request *req)
598 struct tgt_handler *h;
599 struct tgt_opc_slice *s;
600 struct lu_target *tgt;
601 __u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
605 tgt = class_exp2tgt(req->rq_export);
606 if (unlikely(tgt == NULL)) {
607 DEBUG_REQ(D_ERROR, req, "%s: no target for connected export",
608 class_exp2obd(req->rq_export)->obd_name);
609 RETURN(ERR_PTR(-EINVAL));
612 for (s = tgt->lut_slice; s->tos_hs != NULL; s++)
613 if (s->tos_opc_start <= opc && opc < s->tos_opc_end)
616 /* opcode was not found in slice */
617 if (unlikely(s->tos_hs == NULL)) {
618 CERROR("%s: no handlers for opcode 0x%x\n", tgt_name(tgt),
620 RETURN(ERR_PTR(-ENOTSUPP));
623 LASSERT(opc >= s->tos_opc_start && opc < s->tos_opc_end);
624 h = s->tos_hs + (opc - s->tos_opc_start);
625 if (unlikely(h->th_opc == 0)) {
626 CERROR("%s: unsupported opcode 0x%x\n", tgt_name(tgt), opc);
627 RETURN(ERR_PTR(-ENOTSUPP));
633 static int process_req_last_xid(struct ptlrpc_request *req)
637 struct obd_export *exp = req->rq_export;
638 struct tg_export_data *ted = &exp->exp_target_data;
639 bool need_lock = tgt_is_multimodrpcs_client(exp);
643 mutex_lock(&ted->ted_lcd_lock);
644 /* check request's xid is consistent with export's last_xid */
645 last_xid = lustre_msg_get_last_xid(req->rq_reqmsg);
646 if (last_xid > exp->exp_last_xid)
647 exp->exp_last_xid = last_xid;
649 if (req->rq_xid == 0 || req->rq_xid <= exp->exp_last_xid) {
650 /* Some request is allowed to be sent during replay,
651 * such as OUT update requests, FLD requests, so it
652 * is possible that replay requests has smaller XID
653 * than the exp_last_xid.
655 * Some non-replay requests may have smaller XID as
658 * - Client send a no_resend RPC, like statfs;
659 * - The RPC timedout (or some other error) on client,
660 * then it's removed from the unreplied list;
661 * - Client send some other request to bump the
662 * exp_last_xid on server;
663 * - The former RPC got chance to be processed;
665 if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY))
668 DEBUG_REQ(D_WARNING, req,
669 "unexpected xid=%llx != exp_last_xid=%llx, rc = %d",
670 req->rq_xid, exp->exp_last_xid, rc);
675 /* The "last_xid" is the minimum xid among unreplied requests,
676 * if the request is from the previous connection, its xid can
677 * still be larger than "exp_last_xid", then the above check of
678 * xid is not enough to determine whether the request is delayed.
680 * For example, if some replay request was delayed and caused
681 * timeout at client and the replay is restarted, the delayed
682 * replay request will have the larger xid than "exp_last_xid"
684 if (req->rq_export->exp_conn_cnt >
685 lustre_msg_get_conn_cnt(req->rq_reqmsg))
686 GOTO(out, rc = -ESTALE);
688 /* try to release in-memory reply data */
689 if (tgt_is_multimodrpcs_client(exp)) {
690 tgt_handle_received_xid(exp, last_xid);
691 rc = tgt_handle_tag(req);
696 mutex_unlock(&ted->ted_lcd_lock);
701 int tgt_request_handle(struct ptlrpc_request *req)
703 struct tgt_session_info *tsi = tgt_ses_info(req->rq_svc_thread->t_env);
705 struct lustre_msg *msg = req->rq_reqmsg;
706 struct tgt_handler *h;
707 struct lu_target *tgt;
708 int request_fail_id = 0;
709 __u32 opc = lustre_msg_get_opc(msg);
710 struct obd_device *obd;
712 bool is_connect = false;
715 if (unlikely(OBD_FAIL_CHECK(OBD_FAIL_TGT_RECOVERY_REQ_RACE))) {
716 if (cfs_fail_val == 0 &&
717 lustre_msg_get_opc(msg) != OBD_PING &&
718 lustre_msg_get_flags(msg) & MSG_REQ_REPLAY_DONE) {
721 wait_event_idle(cfs_race_waitq, (cfs_race_state == 1));
725 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
726 tsi->tsi_pill = &req->rq_pill;
727 tsi->tsi_env = req->rq_svc_thread->t_env;
729 /* if request has export then get handlers slice from corresponding
730 * target, otherwise that should be connect operation */
731 if (opc == MDS_CONNECT || opc == OST_CONNECT ||
732 opc == MGS_CONNECT) {
734 req_capsule_set(&req->rq_pill, &RQF_CONNECT);
735 rc = target_handle_connect(req);
737 rc = ptlrpc_error(req);
740 /* recovery-small test 18c asks to drop connect reply */
741 if (unlikely(opc == OST_CONNECT &&
742 OBD_FAIL_CHECK(OBD_FAIL_OST_CONNECT_NET2)))
746 if (unlikely(!class_connected_export(req->rq_export))) {
747 if (opc == SEC_CTX_INIT || opc == SEC_CTX_INIT_CONT ||
748 opc == SEC_CTX_FINI) {
749 /* sec context initialization has to be handled
750 * by hand in tgt_handle_request0() */
751 tsi->tsi_reply_fail_id = OBD_FAIL_SEC_CTX_INIT_NET;
753 GOTO(handle_recov, rc = 0);
755 CDEBUG(D_HA, "operation %d on unconnected OST from %s\n",
756 opc, libcfs_id2str(req->rq_peer));
757 req->rq_status = -ENOTCONN;
758 rc = ptlrpc_error(req);
762 tsi->tsi_tgt = tgt = class_exp2tgt(req->rq_export);
763 tsi->tsi_exp = req->rq_export;
764 if (exp_connect_flags(req->rq_export) & OBD_CONNECT_JOBSTATS)
765 tsi->tsi_jobid = lustre_msg_get_jobid(req->rq_reqmsg);
767 tsi->tsi_jobid = NULL;
770 DEBUG_REQ(D_ERROR, req, "%s: No target for connected export",
771 class_exp2obd(req->rq_export)->obd_name);
772 req->rq_status = -EINVAL;
773 rc = ptlrpc_error(req);
777 /* Skip last_xid processing for the recovery thread, otherwise, the
778 * last_xid on same request could be processed twice: first time when
779 * processing the incoming request, second time when the request is
780 * being processed by recovery thread. */
781 obd = class_exp2obd(req->rq_export);
783 /* reset the exp_last_xid on each connection. */
784 req->rq_export->exp_last_xid = 0;
785 } else if (obd->obd_recovery_data.trd_processing_task !=
787 rc = process_req_last_xid(req);
790 rc = ptlrpc_error(req);
795 request_fail_id = tgt->lut_request_fail_id;
796 tsi->tsi_reply_fail_id = tgt->lut_reply_fail_id;
798 h = tgt_handler_find_check(req);
800 req->rq_status = PTR_ERR(h);
801 rc = ptlrpc_error(req);
805 LASSERTF(h->th_opc == opc, "opcode mismatch %d != %d\n",
808 if ((cfs_fail_val == 0 || cfs_fail_val == opc) &&
809 CFS_FAIL_CHECK_ORSET(request_fail_id, CFS_FAIL_ONCE))
812 rc = lustre_msg_check_version(msg, h->th_version);
814 DEBUG_REQ(D_ERROR, req,
815 "%s: drop malformed request version=%08x expect=%08x",
816 tgt_name(tgt), lustre_msg_get_version(msg),
818 req->rq_status = -EINVAL;
819 rc = ptlrpc_error(req);
824 rc = tgt_handle_recovery(req, tsi->tsi_reply_fail_id);
825 if (likely(rc == 1)) {
826 rc = tgt_handle_request0(tsi, h, req);
832 req_capsule_fini(tsi->tsi_pill);
833 if (tsi->tsi_corpus != NULL) {
834 lu_object_put(tsi->tsi_env, tsi->tsi_corpus);
835 tsi->tsi_corpus = NULL;
839 EXPORT_SYMBOL(tgt_request_handle);
841 /** Assign high priority operations to the request if needed. */
842 int tgt_hpreq_handler(struct ptlrpc_request *req)
844 struct tgt_session_info *tsi = tgt_ses_info(req->rq_svc_thread->t_env);
845 struct tgt_handler *h;
850 if (req->rq_export == NULL)
853 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
854 tsi->tsi_pill = &req->rq_pill;
855 tsi->tsi_env = req->rq_svc_thread->t_env;
856 tsi->tsi_tgt = class_exp2tgt(req->rq_export);
857 tsi->tsi_exp = req->rq_export;
859 h = tgt_handler_find_check(req);
865 rc = tgt_request_preprocess(tsi, h, req);
866 if (unlikely(rc != 0))
869 if (h->th_hp != NULL)
873 EXPORT_SYMBOL(tgt_hpreq_handler);
875 void tgt_counter_incr(struct obd_export *exp, int opcode)
877 lprocfs_counter_incr(exp->exp_obd->obd_stats, opcode);
878 if (exp->exp_nid_stats && exp->exp_nid_stats->nid_stats != NULL)
879 lprocfs_counter_incr(exp->exp_nid_stats->nid_stats, opcode);
881 EXPORT_SYMBOL(tgt_counter_incr);
884 * Unified target generic handlers.
887 int tgt_connect_check_sptlrpc(struct ptlrpc_request *req, struct obd_export *exp)
889 struct lu_target *tgt = class_exp2tgt(exp);
890 struct sptlrpc_flavor flvr;
894 LASSERT(tgt->lut_obd);
895 LASSERT(tgt->lut_slice);
897 /* always allow ECHO client */
898 if (unlikely(strcmp(exp->exp_obd->obd_type->typ_name,
899 LUSTRE_ECHO_NAME) == 0)) {
900 exp->exp_flvr.sf_rpc = SPTLRPC_FLVR_ANY;
904 if (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
905 read_lock(&tgt->lut_sptlrpc_lock);
906 sptlrpc_target_choose_flavor(&tgt->lut_sptlrpc_rset,
910 read_unlock(&tgt->lut_sptlrpc_lock);
912 spin_lock(&exp->exp_lock);
913 exp->exp_sp_peer = req->rq_sp_from;
914 exp->exp_flvr = flvr;
916 /* when on mgs, if no restriction is set, or if client
917 * is loopback, allow any flavor */
918 if ((strcmp(exp->exp_obd->obd_type->typ_name,
919 LUSTRE_MGS_NAME) == 0) &&
920 (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_NULL ||
921 exp->exp_connection->c_peer.nid == LNET_NID_LO_0))
922 exp->exp_flvr.sf_rpc = SPTLRPC_FLVR_ANY;
924 if (exp->exp_flvr.sf_rpc != SPTLRPC_FLVR_ANY &&
925 exp->exp_flvr.sf_rpc != req->rq_flvr.sf_rpc) {
926 CERROR("%s: unauthorized rpc flavor %x from %s, "
927 "expect %x\n", tgt_name(tgt),
929 libcfs_nid2str(req->rq_peer.nid),
930 exp->exp_flvr.sf_rpc);
933 spin_unlock(&exp->exp_lock);
935 if (exp->exp_sp_peer != req->rq_sp_from) {
936 CERROR("%s: RPC source %s doesn't match %s\n",
938 sptlrpc_part2name(req->rq_sp_from),
939 sptlrpc_part2name(exp->exp_sp_peer));
942 rc = sptlrpc_target_export_check(exp, req);
949 int tgt_adapt_sptlrpc_conf(struct lu_target *tgt)
951 struct sptlrpc_rule_set tmp_rset;
954 if (unlikely(tgt == NULL)) {
955 CERROR("No target passed");
959 sptlrpc_rule_set_init(&tmp_rset);
960 rc = sptlrpc_conf_target_get_rules(tgt->lut_obd, &tmp_rset);
962 CERROR("%s: failed get sptlrpc rules: rc = %d\n",
967 sptlrpc_target_update_exp_flavor(tgt->lut_obd, &tmp_rset);
969 write_lock(&tgt->lut_sptlrpc_lock);
970 sptlrpc_rule_set_free(&tgt->lut_sptlrpc_rset);
971 tgt->lut_sptlrpc_rset = tmp_rset;
972 write_unlock(&tgt->lut_sptlrpc_lock);
976 EXPORT_SYMBOL(tgt_adapt_sptlrpc_conf);
978 int tgt_connect(struct tgt_session_info *tsi)
980 struct ptlrpc_request *req = tgt_ses_req(tsi);
981 struct obd_connect_data *reply;
986 /* XXX: better to call this check right after getting new export but
987 * before last_rcvd slot allocation to avoid server load upon insecure
988 * connects. This is to be fixed after unifiyng all targets.
990 rc = tgt_connect_check_sptlrpc(req, tsi->tsi_exp);
994 /* To avoid exposing partially initialized connection flags, changes up
995 * to this point have been staged in reply->ocd_connect_flags. Now that
996 * connection handling has completed successfully, atomically update
997 * the connect flags in the shared export data structure. LU-1623 */
998 reply = req_capsule_server_get(tsi->tsi_pill, &RMF_CONNECT_DATA);
999 spin_lock(&tsi->tsi_exp->exp_lock);
1000 *exp_connect_flags_ptr(tsi->tsi_exp) = reply->ocd_connect_flags;
1001 if (reply->ocd_connect_flags & OBD_CONNECT_FLAGS2)
1002 *exp_connect_flags2_ptr(tsi->tsi_exp) =
1003 reply->ocd_connect_flags2;
1004 tsi->tsi_exp->exp_connect_data.ocd_brw_size = reply->ocd_brw_size;
1005 spin_unlock(&tsi->tsi_exp->exp_lock);
1007 if (strcmp(tsi->tsi_exp->exp_obd->obd_type->typ_name,
1008 LUSTRE_MDT_NAME) == 0) {
1009 rc = req_check_sepol(tsi->tsi_pill);
1016 obd_disconnect(class_export_get(tsi->tsi_exp));
1019 EXPORT_SYMBOL(tgt_connect);
1021 int tgt_disconnect(struct tgt_session_info *tsi)
1027 OBD_FAIL_TIMEOUT(OBD_FAIL_OST_DISCONNECT_DELAY, cfs_fail_val);
1029 rc = target_handle_disconnect(tgt_ses_req(tsi));
1031 RETURN(err_serious(rc));
1035 EXPORT_SYMBOL(tgt_disconnect);
1038 * Unified target OBD handlers
1040 int tgt_obd_ping(struct tgt_session_info *tsi)
1046 /* The target-specific part of OBD_PING request handling.
1047 * It controls Filter Modification Data (FMD) expiration each time
1050 * Valid only for replayable targets, e.g. MDT and OFD
1052 if (tsi->tsi_exp->exp_obd->obd_replayable)
1053 tgt_fmd_expire(tsi->tsi_exp);
1055 rc = req_capsule_server_pack(tsi->tsi_pill);
1057 RETURN(err_serious(rc));
1061 EXPORT_SYMBOL(tgt_obd_ping);
1063 int tgt_obd_log_cancel(struct tgt_session_info *tsi)
1065 return err_serious(-EOPNOTSUPP);
1068 int tgt_send_buffer(struct tgt_session_info *tsi, struct lu_rdbuf *rdbuf)
1070 struct ptlrpc_request *req = tgt_ses_req(tsi);
1071 struct obd_export *exp = req->rq_export;
1072 struct ptlrpc_bulk_desc *desc;
1079 for (i = 0; i < rdbuf->rb_nbufs; i++) {
1080 unsigned int offset;
1082 offset = (unsigned long)rdbuf->rb_bufs[i].lb_buf & ~PAGE_MASK;
1083 pages += DIV_ROUND_UP(rdbuf->rb_bufs[i].lb_len + offset,
1087 desc = ptlrpc_prep_bulk_exp(req, pages, 1,
1088 PTLRPC_BULK_PUT_SOURCE,
1090 &ptlrpc_bulk_kiov_nopin_ops);
1094 for (i = 0; i < rdbuf->rb_nbufs; i++)
1095 desc->bd_frag_ops->add_iov_frag(desc,
1096 rdbuf->rb_bufs[i].lb_buf,
1097 rdbuf->rb_bufs[i].lb_len);
1099 rc = target_bulk_io(exp, desc);
1100 ptlrpc_free_bulk(desc);
1103 EXPORT_SYMBOL(tgt_send_buffer);
1105 int tgt_sendpage(struct tgt_session_info *tsi, struct lu_rdpg *rdpg, int nob)
1107 struct ptlrpc_request *req = tgt_ses_req(tsi);
1108 struct obd_export *exp = req->rq_export;
1109 struct ptlrpc_bulk_desc *desc;
1117 desc = ptlrpc_prep_bulk_exp(req, rdpg->rp_npages, 1,
1118 PTLRPC_BULK_PUT_SOURCE,
1120 &ptlrpc_bulk_kiov_pin_ops);
1124 if (!(exp_connect_flags(exp) & OBD_CONNECT_BRW_SIZE))
1125 /* old client requires reply size in it's PAGE_SIZE,
1126 * which is rdpg->rp_count */
1127 nob = rdpg->rp_count;
1129 for (i = 0, tmpcount = nob; i < rdpg->rp_npages && tmpcount > 0;
1130 i++, tmpcount -= tmpsize) {
1131 tmpsize = min_t(int, tmpcount, PAGE_SIZE);
1132 desc->bd_frag_ops->add_kiov_frag(desc, rdpg->rp_pages[i], 0,
1136 LASSERT(desc->bd_nob == nob);
1137 rc = target_bulk_io(exp, desc);
1138 ptlrpc_free_bulk(desc);
1141 EXPORT_SYMBOL(tgt_sendpage);
1144 * OBD_IDX_READ handler
1146 static int tgt_obd_idx_read(struct tgt_session_info *tsi)
1148 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
1149 struct lu_rdpg *rdpg = &tti->tti_u.rdpg.tti_rdpg;
1150 struct idx_info *req_ii, *rep_ii;
1155 memset(rdpg, 0, sizeof(*rdpg));
1156 req_capsule_set(tsi->tsi_pill, &RQF_OBD_IDX_READ);
1158 /* extract idx_info buffer from request & reply */
1159 req_ii = req_capsule_client_get(tsi->tsi_pill, &RMF_IDX_INFO);
1160 if (req_ii == NULL || req_ii->ii_magic != IDX_INFO_MAGIC)
1161 RETURN(err_serious(-EPROTO));
1163 rc = req_capsule_server_pack(tsi->tsi_pill);
1165 RETURN(err_serious(rc));
1167 rep_ii = req_capsule_server_get(tsi->tsi_pill, &RMF_IDX_INFO);
1169 RETURN(err_serious(-EFAULT));
1170 rep_ii->ii_magic = IDX_INFO_MAGIC;
1172 /* extract hash to start with */
1173 rdpg->rp_hash = req_ii->ii_hash_start;
1175 /* extract requested attributes */
1176 rdpg->rp_attrs = req_ii->ii_attrs;
1178 /* check that fid packed in request is valid and supported */
1179 if (!fid_is_sane(&req_ii->ii_fid))
1181 rep_ii->ii_fid = req_ii->ii_fid;
1184 rep_ii->ii_flags = req_ii->ii_flags;
1186 /* compute number of pages to allocate, ii_count is the number of 4KB
1188 if (req_ii->ii_count <= 0)
1189 GOTO(out, rc = -EFAULT);
1190 rdpg->rp_count = min_t(unsigned int, req_ii->ii_count << LU_PAGE_SHIFT,
1191 exp_max_brw_size(tsi->tsi_exp));
1192 rdpg->rp_npages = (rdpg->rp_count + PAGE_SIZE - 1) >> PAGE_SHIFT;
1194 /* allocate pages to store the containers */
1195 OBD_ALLOC(rdpg->rp_pages, rdpg->rp_npages * sizeof(rdpg->rp_pages[0]));
1196 if (rdpg->rp_pages == NULL)
1197 GOTO(out, rc = -ENOMEM);
1198 for (i = 0; i < rdpg->rp_npages; i++) {
1199 rdpg->rp_pages[i] = alloc_page(GFP_NOFS);
1200 if (rdpg->rp_pages[i] == NULL)
1201 GOTO(out, rc = -ENOMEM);
1204 /* populate pages with key/record pairs */
1205 rc = dt_index_read(tsi->tsi_env, tsi->tsi_tgt->lut_bottom, rep_ii, rdpg);
1209 LASSERTF(rc <= rdpg->rp_count, "dt_index_read() returned more than "
1210 "asked %d > %d\n", rc, rdpg->rp_count);
1212 /* send pages to client */
1213 rc = tgt_sendpage(tsi, rdpg, rc);
1218 if (rdpg->rp_pages) {
1219 for (i = 0; i < rdpg->rp_npages; i++)
1220 if (rdpg->rp_pages[i])
1221 __free_page(rdpg->rp_pages[i]);
1222 OBD_FREE(rdpg->rp_pages,
1223 rdpg->rp_npages * sizeof(rdpg->rp_pages[0]));
1228 struct tgt_handler tgt_obd_handlers[] = {
1229 TGT_OBD_HDL (0, OBD_PING, tgt_obd_ping),
1230 TGT_OBD_HDL (0, OBD_IDX_READ, tgt_obd_idx_read)
1232 EXPORT_SYMBOL(tgt_obd_handlers);
1234 int tgt_sync(const struct lu_env *env, struct lu_target *tgt,
1235 struct dt_object *obj, __u64 start, __u64 end)
1241 /* if no objid is specified, it means "sync whole filesystem" */
1243 rc = dt_sync(env, tgt->lut_bottom);
1244 } else if (dt_version_get(env, obj) >
1245 tgt->lut_obd->obd_last_committed) {
1246 rc = dt_object_sync(env, obj, start, end);
1248 atomic_inc(&tgt->lut_sync_count);
1252 EXPORT_SYMBOL(tgt_sync);
1254 * Unified target DLM handlers.
1258 * Unified target BAST
1260 * Ensure data and metadata are synced to disk when lock is canceled if Sync on
1261 * Cancel (SOC) is enabled. If it's extent lock, normally sync obj is enough,
1262 * but if it's cross-MDT lock, because remote object version is not set, a
1263 * filesystem sync is needed.
1265 * \param lock server side lock
1266 * \param desc lock desc
1267 * \param data ldlm_cb_set_arg
1268 * \param flag indicates whether this cancelling or blocking callback
1269 * \retval 0 on success
1270 * \retval negative number on error
1272 static int tgt_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
1273 void *data, int flag)
1276 struct lu_target *tgt;
1277 struct dt_object *obj = NULL;
1283 tgt = class_exp2tgt(lock->l_export);
1285 if (unlikely(tgt == NULL)) {
1286 CDEBUG(D_ERROR, "%s: No target for connected export\n",
1287 class_exp2obd(lock->l_export)->obd_name);
1291 if (flag == LDLM_CB_CANCELING &&
1292 (lock->l_granted_mode & (LCK_EX | LCK_PW | LCK_GROUP)) &&
1293 (tgt->lut_sync_lock_cancel == SYNC_LOCK_CANCEL_ALWAYS ||
1294 (tgt->lut_sync_lock_cancel == SYNC_LOCK_CANCEL_BLOCKING &&
1295 ldlm_is_cbpending(lock))) &&
1296 ((exp_connect_flags(lock->l_export) & OBD_CONNECT_MDS_MDS) ||
1297 lock->l_resource->lr_type == LDLM_EXTENT)) {
1299 __u64 end = OBD_OBJECT_EOF;
1301 rc = lu_env_init(&env, LCT_DT_THREAD);
1302 if (unlikely(rc != 0))
1305 ost_fid_from_resid(&fid, &lock->l_resource->lr_name,
1306 tgt->lut_lsd.lsd_osd_index);
1308 if (lock->l_resource->lr_type == LDLM_EXTENT) {
1309 obj = dt_locate(&env, tgt->lut_bottom, &fid);
1311 GOTO(err_env, rc = PTR_ERR(obj));
1313 if (!dt_object_exists(obj))
1314 GOTO(err_put, rc = -ENOENT);
1316 start = lock->l_policy_data.l_extent.start;
1317 end = lock->l_policy_data.l_extent.end;
1320 rc = tgt_sync(&env, tgt, obj, start, end);
1322 CERROR("%s: syncing "DFID" (%llu-%llu) on lock "
1323 "cancel: rc = %d\n",
1324 tgt_name(tgt), PFID(&fid),
1325 lock->l_policy_data.l_extent.start,
1326 lock->l_policy_data.l_extent.end, rc);
1330 dt_object_put(&env, obj);
1335 rc = ldlm_server_blocking_ast(lock, desc, data, flag);
1339 static struct ldlm_callback_suite tgt_dlm_cbs = {
1340 .lcs_completion = ldlm_server_completion_ast,
1341 .lcs_blocking = tgt_blocking_ast,
1342 .lcs_glimpse = ldlm_server_glimpse_ast
1345 int tgt_enqueue(struct tgt_session_info *tsi)
1347 struct ptlrpc_request *req = tgt_ses_req(tsi);
1352 * tsi->tsi_dlm_req was already swapped and (if necessary) converted,
1353 * tsi->tsi_dlm_cbs was set by the *_req_handle() function.
1355 LASSERT(tsi->tsi_dlm_req != NULL);
1356 rc = ldlm_handle_enqueue0(tsi->tsi_exp->exp_obd->obd_namespace, req,
1357 tsi->tsi_dlm_req, &tgt_dlm_cbs);
1359 RETURN(err_serious(rc));
1361 switch (LUT_FAIL_CLASS(tsi->tsi_reply_fail_id)) {
1363 tsi->tsi_reply_fail_id = OBD_FAIL_MDS_LDLM_REPLY_NET;
1366 tsi->tsi_reply_fail_id = OBD_FAIL_OST_LDLM_REPLY_NET;
1369 tsi->tsi_reply_fail_id = OBD_FAIL_MGS_LDLM_REPLY_NET;
1372 tsi->tsi_reply_fail_id = OBD_FAIL_LDLM_REPLY;
1375 RETURN(req->rq_status);
1377 EXPORT_SYMBOL(tgt_enqueue);
1379 int tgt_convert(struct tgt_session_info *tsi)
1381 struct ptlrpc_request *req = tgt_ses_req(tsi);
1385 LASSERT(tsi->tsi_dlm_req);
1386 rc = ldlm_handle_convert0(req, tsi->tsi_dlm_req);
1388 RETURN(err_serious(rc));
1390 RETURN(req->rq_status);
1393 int tgt_bl_callback(struct tgt_session_info *tsi)
1395 return err_serious(-EOPNOTSUPP);
1398 int tgt_cp_callback(struct tgt_session_info *tsi)
1400 return err_serious(-EOPNOTSUPP);
1403 /* generic LDLM target handler */
1404 struct tgt_handler tgt_dlm_handlers[] = {
1405 TGT_DLM_HDL(HAS_KEY, LDLM_ENQUEUE, tgt_enqueue),
1406 TGT_DLM_HDL(HAS_KEY, LDLM_CONVERT, tgt_convert),
1407 TGT_DLM_HDL_VAR(0, LDLM_BL_CALLBACK, tgt_bl_callback),
1408 TGT_DLM_HDL_VAR(0, LDLM_CP_CALLBACK, tgt_cp_callback)
1410 EXPORT_SYMBOL(tgt_dlm_handlers);
1413 * Unified target LLOG handlers.
1415 int tgt_llog_open(struct tgt_session_info *tsi)
1421 rc = llog_origin_handle_open(tgt_ses_req(tsi));
1425 EXPORT_SYMBOL(tgt_llog_open);
1427 int tgt_llog_read_header(struct tgt_session_info *tsi)
1433 rc = llog_origin_handle_read_header(tgt_ses_req(tsi));
1437 EXPORT_SYMBOL(tgt_llog_read_header);
1439 int tgt_llog_next_block(struct tgt_session_info *tsi)
1445 rc = llog_origin_handle_next_block(tgt_ses_req(tsi));
1449 EXPORT_SYMBOL(tgt_llog_next_block);
1451 int tgt_llog_prev_block(struct tgt_session_info *tsi)
1457 rc = llog_origin_handle_prev_block(tgt_ses_req(tsi));
1461 EXPORT_SYMBOL(tgt_llog_prev_block);
1463 /* generic llog target handler */
1464 struct tgt_handler tgt_llog_handlers[] = {
1465 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_CREATE, tgt_llog_open),
1466 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_NEXT_BLOCK, tgt_llog_next_block),
1467 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_READ_HEADER, tgt_llog_read_header),
1468 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_PREV_BLOCK, tgt_llog_prev_block),
1470 EXPORT_SYMBOL(tgt_llog_handlers);
1473 * sec context handlers
1475 /* XXX: Implement based on mdt_sec_ctx_handle()? */
1476 static int tgt_sec_ctx_handle(struct tgt_session_info *tsi)
1481 struct tgt_handler tgt_sec_ctx_handlers[] = {
1482 TGT_SEC_HDL_VAR(0, SEC_CTX_INIT, tgt_sec_ctx_handle),
1483 TGT_SEC_HDL_VAR(0, SEC_CTX_INIT_CONT, tgt_sec_ctx_handle),
1484 TGT_SEC_HDL_VAR(0, SEC_CTX_FINI, tgt_sec_ctx_handle),
1486 EXPORT_SYMBOL(tgt_sec_ctx_handlers);
1488 int (*tgt_lfsck_in_notify_local)(const struct lu_env *env,
1489 struct dt_device *key,
1490 struct lfsck_req_local *lrl,
1491 struct thandle *th) = NULL;
1493 void tgt_register_lfsck_in_notify_local(int (*notify)(const struct lu_env *,
1495 struct lfsck_req_local *,
1498 tgt_lfsck_in_notify_local = notify;
1500 EXPORT_SYMBOL(tgt_register_lfsck_in_notify_local);
1502 int (*tgt_lfsck_in_notify)(const struct lu_env *env,
1503 struct dt_device *key,
1504 struct lfsck_request *lr) = NULL;
1506 void tgt_register_lfsck_in_notify(int (*notify)(const struct lu_env *,
1508 struct lfsck_request *))
1510 tgt_lfsck_in_notify = notify;
1512 EXPORT_SYMBOL(tgt_register_lfsck_in_notify);
1514 static int (*tgt_lfsck_query)(const struct lu_env *env,
1515 struct dt_device *key,
1516 struct lfsck_request *req,
1517 struct lfsck_reply *rep,
1518 struct lfsck_query *que) = NULL;
1520 void tgt_register_lfsck_query(int (*query)(const struct lu_env *,
1522 struct lfsck_request *,
1523 struct lfsck_reply *,
1524 struct lfsck_query *))
1526 tgt_lfsck_query = query;
1528 EXPORT_SYMBOL(tgt_register_lfsck_query);
1530 /* LFSCK request handlers */
1531 static int tgt_handle_lfsck_notify(struct tgt_session_info *tsi)
1533 const struct lu_env *env = tsi->tsi_env;
1534 struct dt_device *key = tsi->tsi_tgt->lut_bottom;
1535 struct lfsck_request *lr;
1539 lr = req_capsule_client_get(tsi->tsi_pill, &RMF_LFSCK_REQUEST);
1543 rc = tgt_lfsck_in_notify(env, key, lr);
1548 static int tgt_handle_lfsck_query(struct tgt_session_info *tsi)
1550 struct lfsck_request *request;
1551 struct lfsck_reply *reply;
1555 request = req_capsule_client_get(tsi->tsi_pill, &RMF_LFSCK_REQUEST);
1556 if (request == NULL)
1559 reply = req_capsule_server_get(tsi->tsi_pill, &RMF_LFSCK_REPLY);
1563 rc = tgt_lfsck_query(tsi->tsi_env, tsi->tsi_tgt->lut_bottom,
1564 request, reply, NULL);
1566 RETURN(rc < 0 ? rc : 0);
1569 struct tgt_handler tgt_lfsck_handlers[] = {
1570 TGT_LFSCK_HDL(HAS_REPLY, LFSCK_NOTIFY, tgt_handle_lfsck_notify),
1571 TGT_LFSCK_HDL(HAS_REPLY, LFSCK_QUERY, tgt_handle_lfsck_query),
1573 EXPORT_SYMBOL(tgt_lfsck_handlers);
1576 * initialize per-thread page pool (bug 5137).
1578 int tgt_io_thread_init(struct ptlrpc_thread *thread)
1580 struct tgt_thread_big_cache *tbc;
1584 LASSERT(thread != NULL);
1585 LASSERT(thread->t_data == NULL);
1587 OBD_ALLOC_LARGE(tbc, sizeof(*tbc));
1590 thread->t_data = tbc;
1593 EXPORT_SYMBOL(tgt_io_thread_init);
1596 * free per-thread pool created by tgt_thread_init().
1598 void tgt_io_thread_done(struct ptlrpc_thread *thread)
1600 struct tgt_thread_big_cache *tbc;
1604 LASSERT(thread != NULL);
1607 * be prepared to handle partially-initialized pools (because this is
1608 * called from ost_io_thread_init() for cleanup.
1610 tbc = thread->t_data;
1612 OBD_FREE_LARGE(tbc, sizeof(*tbc));
1613 thread->t_data = NULL;
1617 EXPORT_SYMBOL(tgt_io_thread_done);
1620 * Helper function for getting Data-on-MDT file server DLM lock
1621 * if asked by client.
1623 int tgt_mdt_data_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
1624 struct lustre_handle *lh, int mode, __u64 *flags)
1626 union ldlm_policy_data policy = {
1627 .l_inodebits.bits = MDS_INODELOCK_DOM,
1633 LASSERT(lh != NULL);
1634 LASSERT(ns != NULL);
1635 LASSERT(!lustre_handle_is_used(lh));
1637 rc = ldlm_cli_enqueue_local(NULL, ns, res_id, LDLM_IBITS, &policy, mode,
1638 flags, ldlm_blocking_ast,
1639 ldlm_completion_ast, ldlm_glimpse_ast,
1640 NULL, 0, LVB_T_NONE, NULL, lh);
1642 RETURN(rc == ELDLM_OK ? 0 : -EIO);
1644 EXPORT_SYMBOL(tgt_mdt_data_lock);
1646 void tgt_mdt_data_unlock(struct lustre_handle *lh, enum ldlm_mode mode)
1648 LASSERT(lustre_handle_is_used(lh));
1649 ldlm_lock_decref(lh, mode);
1651 EXPORT_SYMBOL(tgt_mdt_data_unlock);
1654 * Helper function for getting server side [start, start+count] DLM lock
1655 * if asked by client.
1657 int tgt_extent_lock(const struct lu_env *env, struct ldlm_namespace *ns,
1658 struct ldlm_res_id *res_id, __u64 start, __u64 end,
1659 struct lustre_handle *lh, int mode, __u64 *flags)
1661 union ldlm_policy_data policy;
1666 LASSERT(lh != NULL);
1667 LASSERT(ns != NULL);
1668 LASSERT(!lustre_handle_is_used(lh));
1670 policy.l_extent.gid = 0;
1671 policy.l_extent.start = start & PAGE_MASK;
1674 * If ->o_blocks is EOF it means "lock till the end of the file".
1675 * Otherwise, it's size of an extent or hole being punched (in bytes).
1677 if (end == OBD_OBJECT_EOF || end < start)
1678 policy.l_extent.end = OBD_OBJECT_EOF;
1680 policy.l_extent.end = end | ~PAGE_MASK;
1682 rc = ldlm_cli_enqueue_local(env, ns, res_id, LDLM_EXTENT, &policy,
1683 mode, flags, ldlm_blocking_ast,
1684 ldlm_completion_ast, ldlm_glimpse_ast,
1685 NULL, 0, LVB_T_NONE, NULL, lh);
1686 RETURN(rc == ELDLM_OK ? 0 : -EIO);
1688 EXPORT_SYMBOL(tgt_extent_lock);
1690 void tgt_extent_unlock(struct lustre_handle *lh, enum ldlm_mode mode)
1692 LASSERT(lustre_handle_is_used(lh));
1693 ldlm_lock_decref(lh, mode);
1695 EXPORT_SYMBOL(tgt_extent_unlock);
1697 static int tgt_brw_lock(const struct lu_env *env, struct obd_export *exp,
1698 struct ldlm_res_id *res_id, struct obd_ioobj *obj,
1699 struct niobuf_remote *nb, struct lustre_handle *lh,
1700 enum ldlm_mode mode)
1702 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
1704 int nrbufs = obj->ioo_bufcnt;
1710 LASSERT(mode == LCK_PR || mode == LCK_PW);
1711 LASSERT(!lustre_handle_is_used(lh));
1713 if (ns->ns_obd->obd_recovering)
1716 if (nrbufs == 0 || !(nb[0].rnb_flags & OBD_BRW_SRVLOCK))
1719 for (i = 1; i < nrbufs; i++)
1720 if (!(nb[i].rnb_flags & OBD_BRW_SRVLOCK))
1723 /* MDT IO for data-on-mdt */
1724 if (exp->exp_connect_data.ocd_connect_flags & OBD_CONNECT_IBITS)
1725 rc = tgt_mdt_data_lock(ns, res_id, lh, mode, &flags);
1727 rc = tgt_extent_lock(env, ns, res_id, nb[0].rnb_offset,
1728 nb[nrbufs - 1].rnb_offset +
1729 nb[nrbufs - 1].rnb_len - 1,
1734 static void tgt_brw_unlock(struct obd_ioobj *obj, struct niobuf_remote *niob,
1735 struct lustre_handle *lh, enum ldlm_mode mode)
1739 LASSERT(mode == LCK_PR || mode == LCK_PW);
1740 LASSERT((obj->ioo_bufcnt > 0 &&
1741 (niob[0].rnb_flags & OBD_BRW_SRVLOCK)) ==
1742 lustre_handle_is_used(lh));
1744 if (lustre_handle_is_used(lh))
1745 tgt_extent_unlock(lh, mode);
1748 static int tgt_checksum_niobuf(struct lu_target *tgt,
1749 struct niobuf_local *local_nb, int npages,
1750 int opc, enum cksum_types cksum_type,
1753 struct ahash_request *req;
1754 unsigned int bufsize;
1756 unsigned char cfs_alg = cksum_obd2cfs(cksum_type);
1758 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1760 CERROR("%s: unable to initialize checksum hash %s\n",
1761 tgt_name(tgt), cfs_crypto_hash_name(cfs_alg));
1762 return PTR_ERR(req);
1765 CDEBUG(D_INFO, "Checksum for algo %s\n", cfs_crypto_hash_name(cfs_alg));
1766 for (i = 0; i < npages; i++) {
1767 /* corrupt the data before we compute the checksum, to
1768 * simulate a client->OST data error */
1769 if (i == 0 && opc == OST_WRITE &&
1770 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) {
1771 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
1772 int len = local_nb[i].lnb_len;
1773 struct page *np = tgt_page_to_corrupt;
1776 char *ptr = kmap_atomic(local_nb[i].lnb_page);
1777 char *ptr2 = page_address(np);
1779 memcpy(ptr2 + off, ptr + off, len);
1780 memcpy(ptr2 + off, "bad3", min(4, len));
1783 /* LU-8376 to preserve original index for
1784 * display in dump_all_bulk_pages() */
1787 cfs_crypto_hash_update_page(req, np, off,
1791 CERROR("%s: can't alloc page for corruption\n",
1795 cfs_crypto_hash_update_page(req, local_nb[i].lnb_page,
1796 local_nb[i].lnb_page_offset & ~PAGE_MASK,
1797 local_nb[i].lnb_len);
1799 /* corrupt the data after we compute the checksum, to
1800 * simulate an OST->client data error */
1801 if (i == 0 && opc == OST_READ &&
1802 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND)) {
1803 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
1804 int len = local_nb[i].lnb_len;
1805 struct page *np = tgt_page_to_corrupt;
1808 char *ptr = kmap_atomic(local_nb[i].lnb_page);
1809 char *ptr2 = page_address(np);
1811 memcpy(ptr2 + off, ptr + off, len);
1812 memcpy(ptr2 + off, "bad4", min(4, len));
1815 /* LU-8376 to preserve original index for
1816 * display in dump_all_bulk_pages() */
1819 cfs_crypto_hash_update_page(req, np, off,
1823 CERROR("%s: can't alloc page for corruption\n",
1829 bufsize = sizeof(*cksum);
1830 err = cfs_crypto_hash_final(req, (unsigned char *)cksum, &bufsize);
1835 char dbgcksum_file_name[PATH_MAX];
1837 static void dump_all_bulk_pages(struct obdo *oa, int count,
1838 struct niobuf_local *local_nb,
1839 __u32 server_cksum, __u32 client_cksum)
1846 /* will only keep dump of pages on first error for the same range in
1847 * file/fid, not during the resends/retries. */
1848 snprintf(dbgcksum_file_name, sizeof(dbgcksum_file_name),
1849 "%s-checksum_dump-ost-"DFID":[%llu-%llu]-%x-%x",
1850 (strncmp(libcfs_debug_file_path_arr, "NONE", 4) != 0 ?
1851 libcfs_debug_file_path_arr :
1852 LIBCFS_DEBUG_FILE_PATH_DEFAULT),
1853 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1854 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1855 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1856 local_nb[0].lnb_file_offset,
1857 local_nb[count-1].lnb_file_offset +
1858 local_nb[count-1].lnb_len - 1, client_cksum, server_cksum);
1859 filp = filp_open(dbgcksum_file_name,
1860 O_CREAT | O_EXCL | O_WRONLY | O_LARGEFILE, 0600);
1864 CDEBUG(D_INFO, "%s: can't open to dump pages with "
1865 "checksum error: rc = %d\n", dbgcksum_file_name,
1868 CERROR("%s: can't open to dump pages with checksum "
1869 "error: rc = %d\n", dbgcksum_file_name, rc);
1873 for (i = 0; i < count; i++) {
1874 len = local_nb[i].lnb_len;
1875 buf = kmap(local_nb[i].lnb_page);
1877 rc = cfs_kernel_write(filp, buf, len, &filp->f_pos);
1879 CERROR("%s: wanted to write %u but got %d "
1880 "error\n", dbgcksum_file_name, len, rc);
1885 CDEBUG(D_INFO, "%s: wrote %d bytes\n",
1886 dbgcksum_file_name, rc);
1888 kunmap(local_nb[i].lnb_page);
1891 rc = vfs_fsync_range(filp, 0, LLONG_MAX, 1);
1893 CERROR("%s: sync returns %d\n", dbgcksum_file_name, rc);
1894 filp_close(filp, NULL);
1897 static int check_read_checksum(struct niobuf_local *local_nb, int npages,
1898 struct obd_export *exp, struct obdo *oa,
1899 const struct lnet_process_id *peer,
1900 __u32 client_cksum, __u32 server_cksum,
1901 enum cksum_types server_cksum_type)
1904 enum cksum_types cksum_type;
1907 /* unlikely to happen and only if resend does not occur due to cksum
1908 * control failure on Client */
1909 if (unlikely(server_cksum == client_cksum)) {
1910 CDEBUG(D_PAGE, "checksum %x confirmed upon retry\n",
1915 if (exp->exp_obd->obd_checksum_dump)
1916 dump_all_bulk_pages(oa, npages, local_nb, server_cksum,
1919 cksum_type = obd_cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1922 if (cksum_type != server_cksum_type)
1923 msg = "the server may have not used the checksum type specified"
1924 " in the original request - likely a protocol problem";
1926 msg = "should have changed on the client or in transit";
1928 start = local_nb[0].lnb_file_offset;
1929 end = local_nb[npages-1].lnb_file_offset +
1930 local_nb[npages-1].lnb_len - 1;
1932 LCONSOLE_ERROR_MSG(0x132, "%s: BAD READ CHECKSUM: %s: from %s inode "
1933 DFID " object "DOSTID" extent [%llu-%llu], client returned csum"
1934 " %x (type %x), server csum %x (type %x)\n",
1935 exp->exp_obd->obd_name,
1936 msg, libcfs_nid2str(peer->nid),
1937 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : 0ULL,
1938 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1939 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1941 start, end, client_cksum, cksum_type, server_cksum,
1947 static int tgt_pages2shortio(struct niobuf_local *local, int npages,
1948 unsigned char *buf, int size)
1950 int i, off, len, copied = size;
1953 for (i = 0; i < npages; i++) {
1954 off = local[i].lnb_page_offset & ~PAGE_MASK;
1955 len = local[i].lnb_len;
1957 CDEBUG(D_PAGE, "index %d offset = %d len = %d left = %d\n",
1962 ptr = kmap_atomic(local[i].lnb_page);
1963 memcpy(buf + off, ptr, len);
1968 return copied - size;
1971 static int tgt_checksum_niobuf_t10pi(struct lu_target *tgt,
1972 struct niobuf_local *local_nb,
1973 int npages, int opc,
1974 obd_dif_csum_fn *fn,
1978 enum cksum_types t10_cksum_type = tgt->lut_dt_conf.ddp_t10_cksum_type;
1979 unsigned char cfs_alg = cksum_obd2cfs(OBD_CKSUM_T10_TOP);
1980 const char *obd_name = tgt->lut_obd->obd_name;
1981 struct ahash_request *req;
1982 unsigned int bufsize;
1983 unsigned char *buffer;
1984 struct page *__page;
1987 int used_number = 0;
1993 __page = alloc_page(GFP_KERNEL);
1997 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1999 CERROR("%s: unable to initialize checksum hash %s\n",
2000 tgt_name(tgt), cfs_crypto_hash_name(cfs_alg));
2001 return PTR_ERR(req);
2004 buffer = kmap(__page);
2005 guard_start = (__u16 *)buffer;
2006 guard_number = PAGE_SIZE / sizeof(*guard_start);
2007 for (i = 0; i < npages; i++) {
2008 /* corrupt the data before we compute the checksum, to
2009 * simulate a client->OST data error */
2010 if (i == 0 && opc == OST_WRITE &&
2011 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) {
2012 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
2013 int len = local_nb[i].lnb_len;
2014 struct page *np = tgt_page_to_corrupt;
2017 char *ptr = kmap_atomic(local_nb[i].lnb_page);
2018 char *ptr2 = page_address(np);
2020 memcpy(ptr2 + off, ptr + off, len);
2021 memcpy(ptr2 + off, "bad3", min(4, len));
2024 /* LU-8376 to preserve original index for
2025 * display in dump_all_bulk_pages() */
2028 cfs_crypto_hash_update_page(req, np, off,
2032 CERROR("%s: can't alloc page for corruption\n",
2038 * The left guard number should be able to hold checksums of a
2041 if (t10_cksum_type && opc == OST_READ &&
2042 local_nb[i].lnb_guard_disk) {
2043 used = DIV_ROUND_UP(local_nb[i].lnb_len, sector_size);
2044 if (used > (guard_number - used_number)) {
2048 memcpy(guard_start + used_number,
2049 local_nb[i].lnb_guards,
2050 used * sizeof(*local_nb[i].lnb_guards));
2052 rc = obd_page_dif_generate_buffer(obd_name,
2053 local_nb[i].lnb_page,
2054 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2055 local_nb[i].lnb_len, guard_start + used_number,
2056 guard_number - used_number, &used, sector_size,
2062 LASSERT(used <= MAX_GUARD_NUMBER);
2064 * If disk support T10PI checksum, copy guards to local_nb.
2065 * If the write is partial page, do not use the guards for bio
2066 * submission since the data might not be full-sector. The bio
2067 * guards will be generated later based on the full sectors. If
2068 * the sector size is 512B rather than 4 KB, or the page size
2069 * is larger than 4KB, this might drop some useful guards for
2070 * partial page write, but it will only add minimal extra time
2071 * of checksum calculation.
2073 if (t10_cksum_type && opc == OST_WRITE &&
2074 local_nb[i].lnb_len == PAGE_SIZE) {
2075 local_nb[i].lnb_guard_rpc = 1;
2076 memcpy(local_nb[i].lnb_guards,
2077 guard_start + used_number,
2078 used * sizeof(*local_nb[i].lnb_guards));
2081 used_number += used;
2082 if (used_number == guard_number) {
2083 cfs_crypto_hash_update_page(req, __page, 0,
2084 used_number * sizeof(*guard_start));
2088 /* corrupt the data after we compute the checksum, to
2089 * simulate an OST->client data error */
2090 if (unlikely(i == 0 && opc == OST_READ &&
2091 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND))) {
2092 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
2093 int len = local_nb[i].lnb_len;
2094 struct page *np = tgt_page_to_corrupt;
2097 char *ptr = kmap_atomic(local_nb[i].lnb_page);
2098 char *ptr2 = page_address(np);
2100 memcpy(ptr2 + off, ptr + off, len);
2101 memcpy(ptr2 + off, "bad4", min(4, len));
2104 /* LU-8376 to preserve original index for
2105 * display in dump_all_bulk_pages() */
2108 cfs_crypto_hash_update_page(req, np, off,
2112 CERROR("%s: can't alloc page for corruption\n",
2121 if (used_number != 0)
2122 cfs_crypto_hash_update_page(req, __page, 0,
2123 used_number * sizeof(*guard_start));
2125 bufsize = sizeof(cksum);
2126 rc = cfs_crypto_hash_final(req, (unsigned char *)&cksum, &bufsize);
2131 __free_page(__page);
2135 static int tgt_checksum_niobuf_rw(struct lu_target *tgt,
2136 enum cksum_types cksum_type,
2137 struct niobuf_local *local_nb,
2138 int npages, int opc, u32 *check_sum)
2140 obd_dif_csum_fn *fn = NULL;
2141 int sector_size = 0;
2145 obd_t10_cksum2dif(cksum_type, &fn, §or_size);
2148 rc = tgt_checksum_niobuf_t10pi(tgt, local_nb, npages,
2149 opc, fn, sector_size,
2152 rc = tgt_checksum_niobuf(tgt, local_nb, npages, opc,
2153 cksum_type, check_sum);
2157 int tgt_brw_read(struct tgt_session_info *tsi)
2159 struct ptlrpc_request *req = tgt_ses_req(tsi);
2160 struct ptlrpc_bulk_desc *desc = NULL;
2161 struct obd_export *exp = tsi->tsi_exp;
2162 struct niobuf_remote *remote_nb;
2163 struct niobuf_local *local_nb;
2164 struct obd_ioobj *ioo;
2165 struct ost_body *body, *repbody;
2166 struct lustre_handle lockh = { 0 };
2167 int npages, nob = 0, rc, i, no_reply = 0,
2169 struct tgt_thread_big_cache *tbc = req->rq_svc_thread->t_data;
2170 const char *obd_name = exp->exp_obd->obd_name;
2174 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL &&
2175 ptlrpc_req2svc(req)->srv_req_portal != MDS_IO_PORTAL) {
2176 CERROR("%s: deny read request from %s to portal %u\n",
2177 tgt_name(tsi->tsi_tgt),
2178 obd_export_nid2str(req->rq_export),
2179 ptlrpc_req2svc(req)->srv_req_portal);
2183 req->rq_bulk_read = 1;
2185 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_READ_BULK))
2188 OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, cfs_fail_val > 0 ?
2189 cfs_fail_val : (obd_timeout + 1) / 4);
2191 /* Check if there is eviction in progress, and if so, wait for it to
2193 if (unlikely(atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
2194 /* We do not care how long it takes */
2196 exp->exp_obd->obd_evict_inprogress_waitq,
2197 !atomic_read(&exp->exp_obd->obd_evict_inprogress));
2200 /* There must be big cache in current thread to process this request
2201 * if it is NULL then something went wrong and it wasn't allocated,
2202 * report -ENOMEM in that case */
2206 body = tsi->tsi_ost_body;
2207 LASSERT(body != NULL);
2209 ioo = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_IOOBJ);
2210 LASSERT(ioo != NULL); /* must exists after tgt_ost_body_unpack */
2212 remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
2213 LASSERT(remote_nb != NULL); /* must exists after tgt_ost_body_unpack */
2215 local_nb = tbc->local;
2217 rc = tgt_brw_lock(tsi->tsi_env, exp, &tsi->tsi_resid, ioo, remote_nb,
2223 * If getting the lock took more time than
2224 * client was willing to wait, drop it. b=11330
2226 if (ktime_get_real_seconds() > req->rq_deadline ||
2227 OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
2229 CERROR("Dropping timed-out read from %s because locking object " DOSTID " took %lld seconds (limit was %lld).\n",
2230 libcfs_id2str(req->rq_peer), POSTID(&ioo->ioo_oid),
2231 ktime_get_real_seconds() - req->rq_arrival_time.tv_sec,
2232 req->rq_deadline - req->rq_arrival_time.tv_sec);
2233 GOTO(out_lock, rc = -ETIMEDOUT);
2236 repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
2237 repbody->oa = body->oa;
2239 npages = PTLRPC_MAX_BRW_PAGES;
2240 rc = obd_preprw(tsi->tsi_env, OBD_BRW_READ, exp, &repbody->oa, 1,
2241 ioo, remote_nb, &npages, local_nb);
2245 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2246 body->oa.o_flags & OBD_FL_SHORT_IO) {
2249 desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
2250 PTLRPC_BULK_PUT_SOURCE,
2252 &ptlrpc_bulk_kiov_nopin_ops);
2254 GOTO(out_commitrw, rc = -ENOMEM);
2258 npages_read = npages;
2259 for (i = 0; i < npages; i++) {
2260 int page_rc = local_nb[i].lnb_rc;
2269 if (page_rc != 0 && desc != NULL) { /* some data! */
2270 LASSERT(local_nb[i].lnb_page != NULL);
2271 desc->bd_frag_ops->add_kiov_frag
2272 (desc, local_nb[i].lnb_page,
2273 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2277 if (page_rc != local_nb[i].lnb_len) { /* short read */
2278 local_nb[i].lnb_len = page_rc;
2279 npages_read = i + (page_rc != 0 ? 1 : 0);
2280 /* All subsequent pages should be 0 */
2281 while (++i < npages)
2282 LASSERT(local_nb[i].lnb_rc == 0);
2287 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
2288 u32 flag = body->oa.o_valid & OBD_MD_FLFLAGS ?
2289 body->oa.o_flags : 0;
2290 enum cksum_types cksum_type = obd_cksum_type_unpack(flag);
2292 repbody->oa.o_flags = obd_cksum_type_pack(obd_name,
2294 repbody->oa.o_valid = OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
2296 rc = tgt_checksum_niobuf_rw(tsi->tsi_tgt, cksum_type,
2297 local_nb, npages_read, OST_READ,
2298 &repbody->oa.o_cksum);
2300 GOTO(out_commitrw, rc);
2301 CDEBUG(D_PAGE, "checksum at read origin: %x\n",
2302 repbody->oa.o_cksum);
2304 /* if a resend it could be for a cksum error, so check Server
2305 * cksum with returned Client cksum (this should even cover
2306 * zero-cksum case) */
2307 if ((body->oa.o_valid & OBD_MD_FLFLAGS) &&
2308 (body->oa.o_flags & OBD_FL_RECOV_RESEND))
2309 check_read_checksum(local_nb, npages_read, exp,
2310 &body->oa, &req->rq_peer,
2312 repbody->oa.o_cksum, cksum_type);
2314 repbody->oa.o_valid = 0;
2316 /* We're finishing using body->oa as an input variable */
2318 /* Check if client was evicted while we were doing i/o before touching
2321 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2322 body->oa.o_flags & OBD_FL_SHORT_IO) {
2323 unsigned char *short_io_buf;
2326 short_io_buf = req_capsule_server_get(&req->rq_pill,
2328 short_io_size = req_capsule_get_size(&req->rq_pill,
2331 rc = tgt_pages2shortio(local_nb, npages_read,
2332 short_io_buf, short_io_size);
2334 req_capsule_shrink(&req->rq_pill,
2337 rc = rc > 0 ? 0 : rc;
2338 } else if (!CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)) {
2339 rc = target_bulk_io(exp, desc);
2343 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2344 body->oa.o_flags & OBD_FL_SHORT_IO)
2345 req_capsule_shrink(&req->rq_pill, &RMF_SHORT_IO, 0,
2350 /* Must commit after prep above in all cases */
2351 rc = obd_commitrw(tsi->tsi_env, OBD_BRW_READ, exp, &repbody->oa, 1, ioo,
2352 remote_nb, npages, local_nb, rc);
2354 tgt_brw_unlock(ioo, remote_nb, &lockh, LCK_PR);
2356 if (desc && !CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2))
2357 ptlrpc_free_bulk(desc);
2362 ptlrpc_lprocfs_brw(req, nob);
2363 } else if (no_reply) {
2364 req->rq_no_reply = 1;
2365 /* reply out callback would free */
2366 ptlrpc_req_drop_rs(req);
2367 LCONSOLE_WARN("%s: Bulk IO read error with %s (at %s), "
2368 "client will retry: rc %d\n",
2370 obd_uuid2str(&exp->exp_client_uuid),
2371 obd_export_nid2str(exp), rc);
2373 /* send a bulk after reply to simulate a network delay or reordering
2374 * by a router - Note that !desc implies short io, so there is no bulk
2376 if (unlikely(CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)) &&
2378 CDEBUG(D_INFO, "reorder BULK\n");
2381 target_bulk_io(exp, desc);
2382 ptlrpc_free_bulk(desc);
2387 EXPORT_SYMBOL(tgt_brw_read);
2389 static int tgt_shortio2pages(struct niobuf_local *local, int npages,
2390 unsigned char *buf, unsigned int size)
2395 for (i = 0; i < npages; i++) {
2396 off = local[i].lnb_page_offset & ~PAGE_MASK;
2397 len = local[i].lnb_len;
2402 CDEBUG(D_PAGE, "index %d offset = %d len = %d left = %d\n",
2404 ptr = kmap_atomic(local[i].lnb_page);
2407 memcpy(ptr + off, buf, len < size ? len : size);
2415 static void tgt_warn_on_cksum(struct ptlrpc_request *req,
2416 struct ptlrpc_bulk_desc *desc,
2417 struct niobuf_local *local_nb, int npages,
2418 u32 client_cksum, u32 server_cksum,
2421 struct obd_export *exp = req->rq_export;
2422 struct ost_body *body;
2426 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2427 LASSERT(body != NULL);
2429 if (desc && req->rq_peer.nid != desc->bd_sender) {
2431 router = libcfs_nid2str(desc->bd_sender);
2434 if (exp->exp_obd->obd_checksum_dump)
2435 dump_all_bulk_pages(&body->oa, npages, local_nb, server_cksum,
2439 CDEBUG_LIMIT(D_INFO, "client csum %x, server csum %x\n",
2440 client_cksum, server_cksum);
2444 LCONSOLE_ERROR_MSG(0x168, "%s: BAD WRITE CHECKSUM: from %s%s%s inode "
2445 DFID" object "DOSTID" extent [%llu-%llu"
2446 "]: client csum %x, server csum %x\n",
2447 exp->exp_obd->obd_name, libcfs_id2str(req->rq_peer),
2449 body->oa.o_valid & OBD_MD_FLFID ?
2450 body->oa.o_parent_seq : (__u64)0,
2451 body->oa.o_valid & OBD_MD_FLFID ?
2452 body->oa.o_parent_oid : 0,
2453 body->oa.o_valid & OBD_MD_FLFID ?
2454 body->oa.o_parent_ver : 0,
2455 POSTID(&body->oa.o_oi),
2456 local_nb[0].lnb_file_offset,
2457 local_nb[npages-1].lnb_file_offset +
2458 local_nb[npages - 1].lnb_len - 1,
2459 client_cksum, server_cksum);
2462 int tgt_brw_write(struct tgt_session_info *tsi)
2464 struct ptlrpc_request *req = tgt_ses_req(tsi);
2465 struct ptlrpc_bulk_desc *desc = NULL;
2466 struct obd_export *exp = req->rq_export;
2467 struct niobuf_remote *remote_nb;
2468 struct niobuf_local *local_nb;
2469 struct obd_ioobj *ioo;
2470 struct ost_body *body, *repbody;
2471 struct lustre_handle lockh = {0};
2473 int objcount, niocount, npages;
2475 enum cksum_types cksum_type = OBD_CKSUM_CRC32;
2476 bool no_reply = false, mmap;
2477 struct tgt_thread_big_cache *tbc = req->rq_svc_thread->t_data;
2478 bool wait_sync = false;
2479 const char *obd_name = exp->exp_obd->obd_name;
2483 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL &&
2484 ptlrpc_req2svc(req)->srv_req_portal != MDS_IO_PORTAL) {
2485 CERROR("%s: deny write request from %s to portal %u\n",
2486 tgt_name(tsi->tsi_tgt),
2487 obd_export_nid2str(req->rq_export),
2488 ptlrpc_req2svc(req)->srv_req_portal);
2489 RETURN(err_serious(-EPROTO));
2492 if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOSPC))
2493 RETURN(err_serious(-ENOSPC));
2494 if (OBD_FAIL_TIMEOUT(OBD_FAIL_OST_EROFS, 1))
2495 RETURN(err_serious(-EROFS));
2497 req->rq_bulk_write = 1;
2499 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
2500 RETURN(err_serious(-EIO));
2501 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK2))
2502 RETURN(err_serious(-EFAULT));
2504 /* pause before transaction has been started */
2505 CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, cfs_fail_val > 0 ?
2506 cfs_fail_val : (obd_timeout + 1) / 4);
2508 /* Delay write commit to show stale size information */
2509 CFS_FAIL_TIMEOUT(OBD_FAIL_OSC_NO_SIZE_DATA, cfs_fail_val);
2511 /* There must be big cache in current thread to process this request
2512 * if it is NULL then something went wrong and it wasn't allocated,
2513 * report -ENOMEM in that case */
2517 body = tsi->tsi_ost_body;
2518 LASSERT(body != NULL);
2520 ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
2521 LASSERT(ioo != NULL); /* must exists after tgt_ost_body_unpack */
2523 objcount = req_capsule_get_size(&req->rq_pill, &RMF_OBD_IOOBJ,
2524 RCL_CLIENT) / sizeof(*ioo);
2526 for (niocount = i = 0; i < objcount; i++)
2527 niocount += ioo[i].ioo_bufcnt;
2529 remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
2530 LASSERT(remote_nb != NULL); /* must exists after tgt_ost_body_unpack */
2531 if (niocount != req_capsule_get_size(&req->rq_pill,
2532 &RMF_NIOBUF_REMOTE, RCL_CLIENT) /
2534 RETURN(err_serious(-EPROTO));
2536 if ((remote_nb[0].rnb_flags & OBD_BRW_MEMALLOC) &&
2537 ptlrpc_connection_is_local(exp->exp_connection))
2538 memory_pressure_set();
2540 req_capsule_set_size(&req->rq_pill, &RMF_RCS, RCL_SERVER,
2541 niocount * sizeof(*rcs));
2542 rc = req_capsule_server_pack(&req->rq_pill);
2544 GOTO(out, rc = err_serious(rc));
2546 CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_PACK, cfs_fail_val);
2547 rcs = req_capsule_server_get(&req->rq_pill, &RMF_RCS);
2549 local_nb = tbc->local;
2551 rc = tgt_brw_lock(tsi->tsi_env, exp, &tsi->tsi_resid, ioo, remote_nb,
2557 * If getting the lock took more time than
2558 * client was willing to wait, drop it. b=11330
2560 if (ktime_get_real_seconds() > req->rq_deadline ||
2561 OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
2563 CERROR("%s: Dropping timed-out write from %s because locking object " DOSTID " took %lld seconds (limit was %lld).\n",
2564 tgt_name(tsi->tsi_tgt), libcfs_id2str(req->rq_peer),
2565 POSTID(&ioo->ioo_oid),
2566 ktime_get_real_seconds() - req->rq_arrival_time.tv_sec,
2567 req->rq_deadline - req->rq_arrival_time.tv_sec);
2568 GOTO(out_lock, rc = -ETIMEDOUT);
2571 /* Because we already sync grant info with client when reconnect,
2572 * grant info will be cleared for resent req, then fed_grant and
2573 * total_grant will not be modified in following preprw_write */
2574 if (lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY)) {
2575 DEBUG_REQ(D_CACHE, req, "clear resent/replay req grant info");
2576 body->oa.o_valid &= ~OBD_MD_FLGRANT;
2579 repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
2580 if (repbody == NULL)
2581 GOTO(out_lock, rc = -ENOMEM);
2582 repbody->oa = body->oa;
2584 npages = PTLRPC_MAX_BRW_PAGES;
2585 rc = obd_preprw(tsi->tsi_env, OBD_BRW_WRITE, exp, &repbody->oa,
2586 objcount, ioo, remote_nb, &npages, local_nb);
2589 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2590 body->oa.o_flags & OBD_FL_SHORT_IO) {
2591 unsigned int short_io_size;
2592 unsigned char *short_io_buf;
2594 short_io_size = req_capsule_get_size(&req->rq_pill,
2597 short_io_buf = req_capsule_client_get(&req->rq_pill,
2599 CDEBUG(D_INFO, "Client use short io for data transfer,"
2600 " size = %d\n", short_io_size);
2602 /* Copy short io buf to pages */
2603 rc = tgt_shortio2pages(local_nb, npages, short_io_buf,
2607 desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
2608 PTLRPC_BULK_GET_SINK,
2610 &ptlrpc_bulk_kiov_nopin_ops);
2612 GOTO(skip_transfer, rc = -ENOMEM);
2614 /* NB Having prepped, we must commit... */
2615 for (i = 0; i < npages; i++)
2616 desc->bd_frag_ops->add_kiov_frag(desc,
2617 local_nb[i].lnb_page,
2618 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2619 local_nb[i].lnb_len);
2621 rc = sptlrpc_svc_prep_bulk(req, desc);
2623 GOTO(skip_transfer, rc);
2625 rc = target_bulk_io(exp, desc);
2631 if (body->oa.o_valid & OBD_MD_FLCKSUM && rc == 0) {
2632 static int cksum_counter;
2634 if (body->oa.o_valid & OBD_MD_FLFLAGS)
2635 cksum_type = obd_cksum_type_unpack(body->oa.o_flags);
2637 repbody->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
2638 repbody->oa.o_flags &= ~OBD_FL_CKSUM_ALL;
2639 repbody->oa.o_flags |= obd_cksum_type_pack(obd_name,
2642 rc = tgt_checksum_niobuf_rw(tsi->tsi_tgt, cksum_type,
2643 local_nb, npages, OST_WRITE,
2644 &repbody->oa.o_cksum);
2646 GOTO(out_commitrw, rc);
2650 if (unlikely(body->oa.o_cksum != repbody->oa.o_cksum)) {
2651 mmap = (body->oa.o_valid & OBD_MD_FLFLAGS &&
2652 body->oa.o_flags & OBD_FL_MMAP);
2654 tgt_warn_on_cksum(req, desc, local_nb, npages,
2656 repbody->oa.o_cksum, mmap);
2658 } else if ((cksum_counter & (-cksum_counter)) ==
2660 CDEBUG(D_INFO, "Checksum %u from %s OK: %x\n",
2661 cksum_counter, libcfs_id2str(req->rq_peer),
2662 repbody->oa.o_cksum);
2667 /* Must commit after prep above in all cases */
2668 rc = obd_commitrw(tsi->tsi_env, OBD_BRW_WRITE, exp, &repbody->oa,
2669 objcount, ioo, remote_nb, npages, local_nb, rc);
2670 if (rc == -ENOTCONN)
2671 /* quota acquire process has been given up because
2672 * either the client has been evicted or the client
2673 * has timed out the request already */
2676 for (i = 0; i < niocount; i++) {
2677 if (!(local_nb[i].lnb_flags & OBD_BRW_ASYNC)) {
2683 * Disable sending mtime back to the client. If the client locked the
2684 * whole object, then it has already updated the mtime on its side,
2685 * otherwise it will have to glimpse anyway (see bug 21489, comment 32)
2687 repbody->oa.o_valid &= ~(OBD_MD_FLMTIME | OBD_MD_FLATIME);
2692 /* set per-requested niobuf return codes */
2693 for (i = j = 0; i < niocount; i++) {
2694 int len = remote_nb[i].rnb_len;
2699 LASSERT(j < npages);
2700 if (local_nb[j].lnb_rc < 0)
2701 rcs[i] = local_nb[j].lnb_rc;
2702 len -= local_nb[j].lnb_len;
2707 LASSERT(j == npages);
2708 ptlrpc_lprocfs_brw(req, nob);
2711 tgt_brw_unlock(ioo, remote_nb, &lockh, LCK_PW);
2713 ptlrpc_free_bulk(desc);
2715 if (unlikely(no_reply || (exp->exp_obd->obd_no_transno && wait_sync))) {
2716 req->rq_no_reply = 1;
2717 /* reply out callback would free */
2718 ptlrpc_req_drop_rs(req);
2719 if (!exp->exp_obd->obd_no_transno)
2720 LCONSOLE_WARN("%s: Bulk IO write error with %s (at %s),"
2721 " client will retry: rc = %d\n",
2723 obd_uuid2str(&exp->exp_client_uuid),
2724 obd_export_nid2str(exp), rc);
2726 memory_pressure_clr();
2729 EXPORT_SYMBOL(tgt_brw_write);
2731 /* Check if request can be reconstructed from saved reply data
2732 * A copy of the reply data is returned in @trd if the pointer is not NULL
2734 int req_can_reconstruct(struct ptlrpc_request *req,
2735 struct tg_reply_data *trd)
2737 struct tg_export_data *ted = &req->rq_export->exp_target_data;
2738 struct lsd_client_data *lcd = ted->ted_lcd;
2741 if (tgt_is_multimodrpcs_client(req->rq_export))
2742 return tgt_lookup_reply(req, trd);
2744 mutex_lock(&ted->ted_lcd_lock);
2745 found = req->rq_xid == lcd->lcd_last_xid ||
2746 req->rq_xid == lcd->lcd_last_close_xid;
2748 if (found && trd != NULL) {
2749 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE) {
2750 trd->trd_reply.lrd_xid = lcd->lcd_last_close_xid;
2751 trd->trd_reply.lrd_transno =
2752 lcd->lcd_last_close_transno;
2753 trd->trd_reply.lrd_result = lcd->lcd_last_close_result;
2755 trd->trd_reply.lrd_xid = lcd->lcd_last_xid;
2756 trd->trd_reply.lrd_transno = lcd->lcd_last_transno;
2757 trd->trd_reply.lrd_result = lcd->lcd_last_result;
2758 trd->trd_reply.lrd_data = lcd->lcd_last_data;
2759 trd->trd_pre_versions[0] = lcd->lcd_pre_versions[0];
2760 trd->trd_pre_versions[1] = lcd->lcd_pre_versions[1];
2761 trd->trd_pre_versions[2] = lcd->lcd_pre_versions[2];
2762 trd->trd_pre_versions[3] = lcd->lcd_pre_versions[3];
2765 mutex_unlock(&ted->ted_lcd_lock);
2769 EXPORT_SYMBOL(req_can_reconstruct);