4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 021110-1307, USA
24 * Copyright (c) 2013, 2017, Intel Corporation.
27 * lustre/target/tgt_handler.c
29 * Lustre Unified Target request handler code
31 * Author: Brian Behlendorf <behlendorf1@llnl.gov>
32 * Author: Mikhail Pershin <mike.pershin@intel.com>
35 #define DEBUG_SUBSYSTEM S_CLASS
37 #include <linux/user_namespace.h>
38 #ifdef HAVE_UIDGID_HEADER
39 # include <linux/uidgid.h>
43 #include <obd_class.h>
44 #include <obd_cksum.h>
45 #include <lustre_lfsck.h>
46 #include <lustre_nodemap.h>
47 #include <lustre_acl.h>
49 #include "tgt_internal.h"
51 char *tgt_name(struct lu_target *tgt)
53 LASSERT(tgt->lut_obd != NULL);
54 return tgt->lut_obd->obd_name;
56 EXPORT_SYMBOL(tgt_name);
59 * Generic code handling requests that have struct mdt_body passed in:
61 * - extract mdt_body from request and save it in @tsi, if present;
63 * - create lu_object, corresponding to the fid in mdt_body, and save it in
66 * - if HAS_BODY flag is set for this request type check whether object
67 * actually exists on storage (lu_object_exists()).
70 static int tgt_mdt_body_unpack(struct tgt_session_info *tsi, __u32 flags)
72 const struct mdt_body *body;
73 struct lu_object *obj;
74 struct req_capsule *pill = tsi->tsi_pill;
79 body = req_capsule_client_get(pill, &RMF_MDT_BODY);
83 tsi->tsi_mdt_body = body;
85 if (!(body->mbo_valid & OBD_MD_FLID))
88 /* mdc_pack_body() doesn't check if fid is zero and set OBD_ML_FID
89 * in any case in pre-2.5 clients. Fix that here if needed */
90 if (unlikely(fid_is_zero(&body->mbo_fid1)))
93 if (!fid_is_sane(&body->mbo_fid1)) {
94 CERROR("%s: invalid FID: "DFID"\n", tgt_name(tsi->tsi_tgt),
95 PFID(&body->mbo_fid1));
99 obj = lu_object_find(tsi->tsi_env,
100 &tsi->tsi_tgt->lut_bottom->dd_lu_dev,
101 &body->mbo_fid1, NULL);
103 if ((flags & HAS_BODY) && !lu_object_exists(obj)) {
104 lu_object_put(tsi->tsi_env, obj);
107 tsi->tsi_corpus = obj;
114 tsi->tsi_fid = body->mbo_fid1;
120 * Validate oa from client.
121 * If the request comes from 2.0 clients, currently only RSVD seq and IDIF
123 * a. objects in Single MDT FS seq = FID_SEQ_OST_MDT0, oi_id != 0
124 * b. Echo objects(seq = 2), old echo client still use oi_id/oi_seq to
125 * pack ost_id. Because non-zero oi_seq will make it diffcult to tell
126 * whether this is oi_fid or real ostid. So it will check
127 * OBD_CONNECT_FID, then convert the ostid to FID for old client.
128 * c. Old FID-disable osc will send IDIF.
129 * d. new FID-enable osc/osp will send normal FID.
131 * And also oi_id/f_oid should always start from 1. oi_id/f_oid = 0 will
132 * be used for LAST_ID file, and only being accessed inside OST now.
134 int tgt_validate_obdo(struct tgt_session_info *tsi, struct obdo *oa)
136 struct ost_id *oi = &oa->o_oi;
137 u64 seq = ostid_seq(oi);
138 u64 id = ostid_id(oi);
142 if (unlikely(!(exp_connect_flags(tsi->tsi_exp) & OBD_CONNECT_FID) &&
143 fid_seq_is_echo(seq))) {
144 /* Sigh 2.[123] client still sends echo req with oi_id = 0
145 * during create, and we will reset this to 1, since this
146 * oi_id is basically useless in the following create process,
147 * but oi_id == 0 will make it difficult to tell whether it is
148 * real FID or ost_id. */
149 oi->oi_fid.f_seq = FID_SEQ_ECHO;
150 oi->oi_fid.f_oid = id ?: 1;
151 oi->oi_fid.f_ver = 0;
153 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
155 if (unlikely((oa->o_valid & OBD_MD_FLID) && id == 0))
156 GOTO(out, rc = -EPROTO);
158 /* Note: this check might be forced in 2.5 or 2.6, i.e.
159 * all of the requests are required to setup FLGROUP */
160 if (unlikely(!(oa->o_valid & OBD_MD_FLGROUP))) {
161 ostid_set_seq_mdt0(oi);
162 oa->o_valid |= OBD_MD_FLGROUP;
166 if (unlikely(!(fid_seq_is_idif(seq) || fid_seq_is_mdt0(seq) ||
167 fid_seq_is_norm(seq) || fid_seq_is_echo(seq))))
168 GOTO(out, rc = -EPROTO);
170 rc = ostid_to_fid(&tti->tti_fid1, oi,
171 tsi->tsi_tgt->lut_lsd.lsd_osd_index);
172 if (unlikely(rc != 0))
175 oi->oi_fid = tti->tti_fid1;
181 CERROR("%s: client %s sent bad object "DOSTID": rc = %d\n",
182 tgt_name(tsi->tsi_tgt), obd_export_nid2str(tsi->tsi_exp),
186 EXPORT_SYMBOL(tgt_validate_obdo);
188 static int tgt_io_data_unpack(struct tgt_session_info *tsi, struct ost_id *oi)
191 struct niobuf_remote *rnb;
192 struct obd_ioobj *ioo;
197 ioo = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_IOOBJ);
201 rnb = req_capsule_client_get(tsi->tsi_pill, &RMF_NIOBUF_REMOTE);
205 max_brw = ioobj_max_brw_get(ioo);
206 if (unlikely((max_brw & (max_brw - 1)) != 0)) {
207 CERROR("%s: client %s sent bad ioobj max %u for "DOSTID
208 ": rc = %d\n", tgt_name(tsi->tsi_tgt),
209 obd_export_nid2str(tsi->tsi_exp), max_brw,
210 POSTID(oi), -EPROTO);
215 obj_count = req_capsule_get_size(tsi->tsi_pill, &RMF_OBD_IOOBJ,
216 RCL_CLIENT) / sizeof(*ioo);
217 if (obj_count == 0) {
218 CERROR("%s: short ioobj\n", tgt_name(tsi->tsi_tgt));
220 } else if (obj_count > 1) {
221 CERROR("%s: too many ioobjs (%d)\n", tgt_name(tsi->tsi_tgt),
226 if (ioo->ioo_bufcnt == 0) {
227 CERROR("%s: ioo has zero bufcnt\n", tgt_name(tsi->tsi_tgt));
231 if (ioo->ioo_bufcnt > PTLRPC_MAX_BRW_PAGES) {
232 DEBUG_REQ(D_RPCTRACE, tgt_ses_req(tsi),
233 "bulk has too many pages (%d)",
241 static int tgt_ost_body_unpack(struct tgt_session_info *tsi, __u32 flags)
243 struct ost_body *body;
244 struct req_capsule *pill = tsi->tsi_pill;
245 struct lu_nodemap *nodemap;
250 body = req_capsule_client_get(pill, &RMF_OST_BODY);
254 rc = tgt_validate_obdo(tsi, &body->oa);
258 nodemap = nodemap_get_from_exp(tsi->tsi_exp);
260 RETURN(PTR_ERR(nodemap));
262 body->oa.o_uid = nodemap_map_id(nodemap, NODEMAP_UID,
263 NODEMAP_CLIENT_TO_FS,
265 body->oa.o_gid = nodemap_map_id(nodemap, NODEMAP_GID,
266 NODEMAP_CLIENT_TO_FS,
268 nodemap_putref(nodemap);
270 tsi->tsi_ost_body = body;
271 tsi->tsi_fid = body->oa.o_oi.oi_fid;
273 if (req_capsule_has_field(pill, &RMF_OBD_IOOBJ, RCL_CLIENT)) {
274 rc = tgt_io_data_unpack(tsi, &body->oa.o_oi);
279 if (!(body->oa.o_valid & OBD_MD_FLID)) {
280 if (flags & HAS_BODY) {
281 CERROR("%s: OBD_MD_FLID flag is not set in ost_body but OID/FID is mandatory with HAS_BODY\n",
282 tgt_name(tsi->tsi_tgt));
289 ost_fid_build_resid(&tsi->tsi_fid, &tsi->tsi_resid);
292 * OST doesn't get object in advance for further use to prevent
293 * situations with nested object_find which is potential deadlock.
295 tsi->tsi_corpus = NULL;
300 * Do necessary preprocessing according to handler ->th_flags.
302 static int tgt_request_preprocess(struct tgt_session_info *tsi,
303 struct tgt_handler *h,
304 struct ptlrpc_request *req)
306 struct req_capsule *pill = tsi->tsi_pill;
307 __u32 flags = h->th_flags;
312 if (tsi->tsi_preprocessed)
315 LASSERT(h->th_act != NULL);
316 LASSERT(h->th_opc == lustre_msg_get_opc(req->rq_reqmsg));
317 LASSERT(current->journal_info == NULL);
319 LASSERT(ergo(flags & (HAS_BODY | HAS_REPLY),
321 if (h->th_fmt != NULL) {
322 req_capsule_set(pill, h->th_fmt);
323 if (req_capsule_has_field(pill, &RMF_MDT_BODY, RCL_CLIENT)) {
324 rc = tgt_mdt_body_unpack(tsi, flags);
327 } else if (req_capsule_has_field(pill, &RMF_OST_BODY,
329 rc = tgt_ost_body_unpack(tsi, flags);
335 if (flags & IS_MUTABLE && tgt_conn_flags(tsi) & OBD_CONNECT_RDONLY)
338 if (flags & HAS_KEY) {
339 struct ldlm_request *dlm_req;
341 LASSERT(h->th_fmt != NULL);
343 dlm_req = req_capsule_client_get(pill, &RMF_DLM_REQ);
344 if (dlm_req != NULL) {
345 union ldlm_wire_policy_data *policy =
346 &dlm_req->lock_desc.l_policy_data;
348 if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
350 (policy->l_inodebits.bits |
351 policy->l_inodebits.try_bits) == 0)) {
353 * Lock without inodebits makes no sense and
354 * will oops later in ldlm. If client miss to
355 * set such bits, do not trigger ASSERTION.
357 * For liblustre flock case, it maybe zero.
361 tsi->tsi_dlm_req = dlm_req;
367 tsi->tsi_preprocessed = 1;
372 * Invoke handler for this request opc. Also do necessary preprocessing
373 * (according to handler ->th_flags), and post-processing (setting of
374 * ->last_{xid,committed}).
376 static int tgt_handle_request0(struct tgt_session_info *tsi,
377 struct tgt_handler *h,
378 struct ptlrpc_request *req)
382 __u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
387 /* When dealing with sec context requests, no export is associated yet,
388 * because these requests are sent before *_CONNECT requests.
389 * A NULL req->rq_export means the normal *_common_slice handlers will
390 * not be called, because there is no reference to the target.
391 * So deal with them by hand and jump directly to target_send_reply().
395 case SEC_CTX_INIT_CONT:
397 CFS_FAIL_TIMEOUT(OBD_FAIL_SEC_CTX_HDL_PAUSE, cfs_fail_val);
402 * Checking for various OBD_FAIL_$PREF_$OPC_NET codes. _Do_ not try
403 * to put same checks into handlers like mdt_close(), mdt_reint(),
404 * etc., without talking to mdt authors first. Checking same thing
405 * there again is useless and returning 0 error without packing reply
406 * is buggy! Handlers either pack reply or return error.
408 * We return 0 here and do not send any reply in order to emulate
409 * network failure. Do not send any reply in case any of NET related
410 * fail_id has occured.
412 if (OBD_FAIL_CHECK_ORSET(h->th_fail_id, OBD_FAIL_ONCE))
414 if (unlikely(lustre_msg_get_opc(req->rq_reqmsg) == MDS_REINT &&
415 OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_MULTI_NET)))
418 rc = tgt_request_preprocess(tsi, h, req);
419 /* pack reply if reply format is fixed */
420 if (rc == 0 && h->th_flags & HAS_REPLY) {
422 if (req_capsule_has_field(tsi->tsi_pill, &RMF_MDT_MD,
424 req_capsule_set_size(tsi->tsi_pill, &RMF_MDT_MD,
426 tsi->tsi_mdt_body->mbo_eadatasize);
427 if (req_capsule_has_field(tsi->tsi_pill, &RMF_LOGCOOKIES,
429 req_capsule_set_size(tsi->tsi_pill, &RMF_LOGCOOKIES,
431 if (req_capsule_has_field(tsi->tsi_pill, &RMF_ACL, RCL_SERVER))
432 req_capsule_set_size(tsi->tsi_pill,
433 &RMF_ACL, RCL_SERVER,
434 LUSTRE_POSIX_ACL_MAX_SIZE_OLD);
436 if (req_capsule_has_field(tsi->tsi_pill, &RMF_SHORT_IO,
438 struct niobuf_remote *remote_nb =
439 req_capsule_client_get(tsi->tsi_pill,
441 struct ost_body *body = tsi->tsi_ost_body;
443 req_capsule_set_size(tsi->tsi_pill, &RMF_SHORT_IO,
445 (body->oa.o_flags & OBD_FL_SHORT_IO) ?
446 remote_nb[0].rnb_len : 0);
449 rc = req_capsule_server_pack(tsi->tsi_pill);
452 if (likely(rc == 0)) {
454 * Process request, there can be two types of rc:
455 * 1) errors with msg unpack/pack, other failures outside the
456 * operation itself. This is counted as serious errors;
457 * 2) errors during fs operation, should be placed in rq_status
461 if (!is_serious(rc) &&
462 !req->rq_no_reply && req->rq_reply_state == NULL) {
463 DEBUG_REQ(D_ERROR, req, "%s \"handler\" %s did not "
464 "pack reply and returned 0 error\n",
465 tgt_name(tsi->tsi_tgt), h->th_name);
468 serious = is_serious(rc);
469 rc = clear_serious(rc);
477 * ELDLM_* codes which > 0 should be in rq_status only as well as
478 * all non-serious errors.
480 if (rc > 0 || !serious)
483 LASSERT(current->journal_info == NULL);
485 if (likely(rc == 0 && req->rq_export))
486 target_committed_to_req(req);
489 target_send_reply(req, rc, tsi->tsi_reply_fail_id);
493 static int tgt_filter_recovery_request(struct ptlrpc_request *req,
494 struct obd_device *obd, int *process)
496 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
503 case MDS_SYNC: /* used in unmounting */
517 case MDS_HSM_PROGRESS:
518 case MDS_HSM_STATE_SET:
519 case MDS_HSM_REQUEST:
520 *process = target_queue_recovery_request(req, obd);
524 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
531 * Handle recovery. Return:
532 * +1: continue request processing;
533 * -ve: abort immediately with the given error code;
534 * 0: send reply with error code in req->rq_status;
536 static int tgt_handle_recovery(struct ptlrpc_request *req, int reply_fail_id)
540 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
545 case SEC_CTX_INIT_CONT:
550 if (!req->rq_export->exp_obd->obd_replayable)
553 /* sanity check: if the xid matches, the request must be marked as a
554 * resent or replayed */
555 if (req_can_reconstruct(req, NULL)) {
556 if (!(lustre_msg_get_flags(req->rq_reqmsg) &
557 (MSG_RESENT | MSG_REPLAY))) {
558 DEBUG_REQ(D_WARNING, req, "rq_xid %llu matches "
559 "saved xid, expected REPLAY or RESENT flag "
561 lustre_msg_get_flags(req->rq_reqmsg));
562 req->rq_status = -ENOTCONN;
566 /* else: note the opposite is not always true; a RESENT req after a
567 * failover will usually not match the last_xid, since it was likely
568 * never committed. A REPLAYed request will almost never match the
569 * last xid, however it could for a committed, but still retained,
572 /* Check for aborted recovery... */
573 if (unlikely(req->rq_export->exp_obd->obd_recovering)) {
577 DEBUG_REQ(D_INFO, req, "Got new replay");
578 rc = tgt_filter_recovery_request(req, req->rq_export->exp_obd,
580 if (rc != 0 || !should_process)
582 else if (should_process < 0) {
583 req->rq_status = should_process;
584 rc = ptlrpc_error(req);
591 /* Initial check for request, it is validation mostly */
592 static struct tgt_handler *tgt_handler_find_check(struct ptlrpc_request *req)
594 struct tgt_handler *h;
595 struct tgt_opc_slice *s;
596 struct lu_target *tgt;
597 __u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
601 tgt = class_exp2tgt(req->rq_export);
602 if (unlikely(tgt == NULL)) {
603 DEBUG_REQ(D_ERROR, req, "%s: No target for connected export\n",
604 class_exp2obd(req->rq_export)->obd_name);
605 RETURN(ERR_PTR(-EINVAL));
608 for (s = tgt->lut_slice; s->tos_hs != NULL; s++)
609 if (s->tos_opc_start <= opc && opc < s->tos_opc_end)
612 /* opcode was not found in slice */
613 if (unlikely(s->tos_hs == NULL)) {
614 CERROR("%s: no handlers for opcode 0x%x\n", tgt_name(tgt),
616 RETURN(ERR_PTR(-ENOTSUPP));
619 LASSERT(opc >= s->tos_opc_start && opc < s->tos_opc_end);
620 h = s->tos_hs + (opc - s->tos_opc_start);
621 if (unlikely(h->th_opc == 0)) {
622 CERROR("%s: unsupported opcode 0x%x\n", tgt_name(tgt), opc);
623 RETURN(ERR_PTR(-ENOTSUPP));
629 static int process_req_last_xid(struct ptlrpc_request *req)
634 /* check request's xid is consistent with export's last_xid */
635 last_xid = lustre_msg_get_last_xid(req->rq_reqmsg);
636 if (last_xid > req->rq_export->exp_last_xid)
637 req->rq_export->exp_last_xid = last_xid;
639 if (req->rq_xid == 0 ||
640 (req->rq_xid <= req->rq_export->exp_last_xid)) {
641 DEBUG_REQ(D_ERROR, req, "Unexpected xid %llx vs. "
642 "last_xid %llx\n", req->rq_xid,
643 req->rq_export->exp_last_xid);
644 /* Some request is allowed to be sent during replay,
645 * such as OUT update requests, FLD requests, so it
646 * is possible that replay requests has smaller XID
647 * than the exp_last_xid.
649 * Some non-replay requests may have smaller XID as
652 * - Client send a no_resend RPC, like statfs;
653 * - The RPC timedout (or some other error) on client,
654 * then it's removed from the unreplied list;
655 * - Client send some other request to bump the
656 * exp_last_xid on server;
657 * - The former RPC got chance to be processed;
659 if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY))
663 /* The "last_xid" is the minimum xid among unreplied requests,
664 * if the request is from the previous connection, its xid can
665 * still be larger than "exp_last_xid", then the above check of
666 * xid is not enough to determine whether the request is delayed.
668 * For example, if some replay request was delayed and caused
669 * timeout at client and the replay is restarted, the delayed
670 * replay request will have the larger xid than "exp_last_xid"
672 if (req->rq_export->exp_conn_cnt >
673 lustre_msg_get_conn_cnt(req->rq_reqmsg))
676 /* try to release in-memory reply data */
677 if (tgt_is_multimodrpcs_client(req->rq_export)) {
678 tgt_handle_received_xid(req->rq_export,
679 lustre_msg_get_last_xid(req->rq_reqmsg));
680 if (!(lustre_msg_get_flags(req->rq_reqmsg) &
681 (MSG_RESENT | MSG_REPLAY)))
682 tgt_handle_tag(req->rq_export,
683 lustre_msg_get_tag(req->rq_reqmsg));
688 int tgt_request_handle(struct ptlrpc_request *req)
690 struct tgt_session_info *tsi = tgt_ses_info(req->rq_svc_thread->t_env);
692 struct lustre_msg *msg = req->rq_reqmsg;
693 struct tgt_handler *h;
694 struct lu_target *tgt;
695 int request_fail_id = 0;
696 __u32 opc = lustre_msg_get_opc(msg);
697 struct obd_device *obd;
699 bool is_connect = false;
702 if (unlikely(OBD_FAIL_CHECK(OBD_FAIL_TGT_RECOVERY_REQ_RACE))) {
703 if (cfs_fail_val == 0 &&
704 lustre_msg_get_opc(msg) != OBD_PING &&
705 lustre_msg_get_flags(msg) & MSG_REQ_REPLAY_DONE) {
706 struct l_wait_info lwi = { 0 };
710 l_wait_event(cfs_race_waitq, (cfs_race_state == 1),
715 /* Refill the context, to make sure all thread keys are allocated */
716 lu_env_refill(req->rq_svc_thread->t_env);
718 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
719 tsi->tsi_pill = &req->rq_pill;
720 tsi->tsi_env = req->rq_svc_thread->t_env;
722 /* if request has export then get handlers slice from corresponding
723 * target, otherwise that should be connect operation */
724 if (opc == MDS_CONNECT || opc == OST_CONNECT ||
725 opc == MGS_CONNECT) {
727 req_capsule_set(&req->rq_pill, &RQF_CONNECT);
728 rc = target_handle_connect(req);
730 rc = ptlrpc_error(req);
733 /* recovery-small test 18c asks to drop connect reply */
734 if (unlikely(opc == OST_CONNECT &&
735 OBD_FAIL_CHECK(OBD_FAIL_OST_CONNECT_NET2)))
739 if (unlikely(!class_connected_export(req->rq_export))) {
740 if (opc == SEC_CTX_INIT || opc == SEC_CTX_INIT_CONT ||
741 opc == SEC_CTX_FINI) {
742 /* sec context initialization has to be handled
743 * by hand in tgt_handle_request0() */
744 tsi->tsi_reply_fail_id = OBD_FAIL_SEC_CTX_INIT_NET;
746 GOTO(handle_recov, rc = 0);
748 CDEBUG(D_HA, "operation %d on unconnected OST from %s\n",
749 opc, libcfs_id2str(req->rq_peer));
750 req->rq_status = -ENOTCONN;
751 rc = ptlrpc_error(req);
755 tsi->tsi_tgt = tgt = class_exp2tgt(req->rq_export);
756 tsi->tsi_exp = req->rq_export;
757 if (exp_connect_flags(req->rq_export) & OBD_CONNECT_JOBSTATS)
758 tsi->tsi_jobid = lustre_msg_get_jobid(req->rq_reqmsg);
760 tsi->tsi_jobid = NULL;
763 DEBUG_REQ(D_ERROR, req, "%s: No target for connected export\n",
764 class_exp2obd(req->rq_export)->obd_name);
765 req->rq_status = -EINVAL;
766 rc = ptlrpc_error(req);
770 /* Skip last_xid processing for the recovery thread, otherwise, the
771 * last_xid on same request could be processed twice: first time when
772 * processing the incoming request, second time when the request is
773 * being processed by recovery thread. */
774 obd = class_exp2obd(req->rq_export);
776 /* reset the exp_last_xid on each connection. */
777 req->rq_export->exp_last_xid = 0;
778 } else if (obd->obd_recovery_data.trd_processing_task !=
780 rc = process_req_last_xid(req);
783 rc = ptlrpc_error(req);
788 request_fail_id = tgt->lut_request_fail_id;
789 tsi->tsi_reply_fail_id = tgt->lut_reply_fail_id;
791 h = tgt_handler_find_check(req);
793 req->rq_status = PTR_ERR(h);
794 rc = ptlrpc_error(req);
798 LASSERTF(h->th_opc == opc, "opcode mismatch %d != %d\n",
801 if ((cfs_fail_val == 0 || cfs_fail_val == opc) &&
802 CFS_FAIL_CHECK_ORSET(request_fail_id, CFS_FAIL_ONCE))
805 rc = lustre_msg_check_version(msg, h->th_version);
807 DEBUG_REQ(D_ERROR, req, "%s: drop mal-formed request, version"
808 " %08x, expecting %08x\n", tgt_name(tgt),
809 lustre_msg_get_version(msg), h->th_version);
810 req->rq_status = -EINVAL;
811 rc = ptlrpc_error(req);
816 rc = tgt_handle_recovery(req, tsi->tsi_reply_fail_id);
817 if (likely(rc == 1)) {
818 rc = tgt_handle_request0(tsi, h, req);
824 req_capsule_fini(tsi->tsi_pill);
825 if (tsi->tsi_corpus != NULL) {
826 lu_object_put(tsi->tsi_env, tsi->tsi_corpus);
827 tsi->tsi_corpus = NULL;
831 EXPORT_SYMBOL(tgt_request_handle);
833 /** Assign high priority operations to the request if needed. */
834 int tgt_hpreq_handler(struct ptlrpc_request *req)
836 struct tgt_session_info *tsi = tgt_ses_info(req->rq_svc_thread->t_env);
837 struct tgt_handler *h;
842 if (req->rq_export == NULL)
845 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
846 tsi->tsi_pill = &req->rq_pill;
847 tsi->tsi_env = req->rq_svc_thread->t_env;
848 tsi->tsi_tgt = class_exp2tgt(req->rq_export);
849 tsi->tsi_exp = req->rq_export;
851 h = tgt_handler_find_check(req);
857 rc = tgt_request_preprocess(tsi, h, req);
858 if (unlikely(rc != 0))
861 if (h->th_hp != NULL)
865 EXPORT_SYMBOL(tgt_hpreq_handler);
867 void tgt_counter_incr(struct obd_export *exp, int opcode)
869 lprocfs_counter_incr(exp->exp_obd->obd_stats, opcode);
870 if (exp->exp_nid_stats && exp->exp_nid_stats->nid_stats != NULL)
871 lprocfs_counter_incr(exp->exp_nid_stats->nid_stats, opcode);
873 EXPORT_SYMBOL(tgt_counter_incr);
876 * Unified target generic handlers.
879 int tgt_connect_check_sptlrpc(struct ptlrpc_request *req, struct obd_export *exp)
881 struct lu_target *tgt = class_exp2tgt(exp);
882 struct sptlrpc_flavor flvr;
886 LASSERT(tgt->lut_obd);
887 LASSERT(tgt->lut_slice);
889 /* always allow ECHO client */
890 if (unlikely(strcmp(exp->exp_obd->obd_type->typ_name,
891 LUSTRE_ECHO_NAME) == 0)) {
892 exp->exp_flvr.sf_rpc = SPTLRPC_FLVR_ANY;
896 if (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
897 read_lock(&tgt->lut_sptlrpc_lock);
898 sptlrpc_target_choose_flavor(&tgt->lut_sptlrpc_rset,
902 read_unlock(&tgt->lut_sptlrpc_lock);
904 spin_lock(&exp->exp_lock);
905 exp->exp_sp_peer = req->rq_sp_from;
906 exp->exp_flvr = flvr;
908 /* when on mgs, if no restriction is set, or if client
909 * is loopback, allow any flavor */
910 if ((strcmp(exp->exp_obd->obd_type->typ_name,
911 LUSTRE_MGS_NAME) == 0) &&
912 (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_NULL ||
913 LNET_NETTYP(LNET_NIDNET(exp->exp_connection->c_peer.nid))
915 exp->exp_flvr.sf_rpc = SPTLRPC_FLVR_ANY;
917 if (exp->exp_flvr.sf_rpc != SPTLRPC_FLVR_ANY &&
918 exp->exp_flvr.sf_rpc != req->rq_flvr.sf_rpc) {
919 CERROR("%s: unauthorized rpc flavor %x from %s, "
920 "expect %x\n", tgt_name(tgt),
922 libcfs_nid2str(req->rq_peer.nid),
923 exp->exp_flvr.sf_rpc);
926 spin_unlock(&exp->exp_lock);
928 if (exp->exp_sp_peer != req->rq_sp_from) {
929 CERROR("%s: RPC source %s doesn't match %s\n",
931 sptlrpc_part2name(req->rq_sp_from),
932 sptlrpc_part2name(exp->exp_sp_peer));
935 rc = sptlrpc_target_export_check(exp, req);
942 int tgt_adapt_sptlrpc_conf(struct lu_target *tgt)
944 struct sptlrpc_rule_set tmp_rset;
947 if (unlikely(tgt == NULL)) {
948 CERROR("No target passed");
952 sptlrpc_rule_set_init(&tmp_rset);
953 rc = sptlrpc_conf_target_get_rules(tgt->lut_obd, &tmp_rset);
955 CERROR("%s: failed get sptlrpc rules: rc = %d\n",
960 sptlrpc_target_update_exp_flavor(tgt->lut_obd, &tmp_rset);
962 write_lock(&tgt->lut_sptlrpc_lock);
963 sptlrpc_rule_set_free(&tgt->lut_sptlrpc_rset);
964 tgt->lut_sptlrpc_rset = tmp_rset;
965 write_unlock(&tgt->lut_sptlrpc_lock);
969 EXPORT_SYMBOL(tgt_adapt_sptlrpc_conf);
971 int tgt_connect(struct tgt_session_info *tsi)
973 struct ptlrpc_request *req = tgt_ses_req(tsi);
974 struct obd_connect_data *reply;
979 /* XXX: better to call this check right after getting new export but
980 * before last_rcvd slot allocation to avoid server load upon insecure
981 * connects. This is to be fixed after unifiyng all targets.
983 rc = tgt_connect_check_sptlrpc(req, tsi->tsi_exp);
987 /* To avoid exposing partially initialized connection flags, changes up
988 * to this point have been staged in reply->ocd_connect_flags. Now that
989 * connection handling has completed successfully, atomically update
990 * the connect flags in the shared export data structure. LU-1623 */
991 reply = req_capsule_server_get(tsi->tsi_pill, &RMF_CONNECT_DATA);
992 spin_lock(&tsi->tsi_exp->exp_lock);
993 *exp_connect_flags_ptr(tsi->tsi_exp) = reply->ocd_connect_flags;
994 if (reply->ocd_connect_flags & OBD_CONNECT_FLAGS2)
995 *exp_connect_flags2_ptr(tsi->tsi_exp) =
996 reply->ocd_connect_flags2;
997 tsi->tsi_exp->exp_connect_data.ocd_brw_size = reply->ocd_brw_size;
998 spin_unlock(&tsi->tsi_exp->exp_lock);
1002 obd_disconnect(class_export_get(tsi->tsi_exp));
1005 EXPORT_SYMBOL(tgt_connect);
1007 int tgt_disconnect(struct tgt_session_info *tsi)
1013 OBD_FAIL_TIMEOUT(OBD_FAIL_OST_DISCONNECT_DELAY, cfs_fail_val);
1015 rc = target_handle_disconnect(tgt_ses_req(tsi));
1017 RETURN(err_serious(rc));
1021 EXPORT_SYMBOL(tgt_disconnect);
1024 * Unified target OBD handlers
1026 int tgt_obd_ping(struct tgt_session_info *tsi)
1032 /* The target-specific part of OBD_PING request handling.
1033 * It controls Filter Modification Data (FMD) expiration each time
1036 * Valid only for replayable targets, e.g. MDT and OFD
1038 if (tsi->tsi_exp->exp_obd->obd_replayable)
1039 tgt_fmd_expire(tsi->tsi_exp);
1041 rc = req_capsule_server_pack(tsi->tsi_pill);
1043 RETURN(err_serious(rc));
1047 EXPORT_SYMBOL(tgt_obd_ping);
1049 int tgt_obd_log_cancel(struct tgt_session_info *tsi)
1051 return err_serious(-EOPNOTSUPP);
1054 int tgt_send_buffer(struct tgt_session_info *tsi, struct lu_rdbuf *rdbuf)
1056 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
1057 struct ptlrpc_request *req = tgt_ses_req(tsi);
1058 struct obd_export *exp = req->rq_export;
1059 struct ptlrpc_bulk_desc *desc;
1060 struct l_wait_info *lwi = &tti->tti_u.update.tti_wait_info;
1066 desc = ptlrpc_prep_bulk_exp(req, rdbuf->rb_nbufs, 1,
1067 PTLRPC_BULK_PUT_SOURCE | PTLRPC_BULK_BUF_KVEC,
1068 MDS_BULK_PORTAL, &ptlrpc_bulk_kvec_ops);
1072 for (i = 0; i < rdbuf->rb_nbufs; i++)
1073 desc->bd_frag_ops->add_iov_frag(desc,
1074 rdbuf->rb_bufs[i].lb_buf,
1075 rdbuf->rb_bufs[i].lb_len);
1077 rc = target_bulk_io(exp, desc, lwi);
1078 ptlrpc_free_bulk(desc);
1081 EXPORT_SYMBOL(tgt_send_buffer);
1083 int tgt_sendpage(struct tgt_session_info *tsi, struct lu_rdpg *rdpg, int nob)
1085 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
1086 struct ptlrpc_request *req = tgt_ses_req(tsi);
1087 struct obd_export *exp = req->rq_export;
1088 struct ptlrpc_bulk_desc *desc;
1089 struct l_wait_info *lwi = &tti->tti_u.rdpg.tti_wait_info;
1097 desc = ptlrpc_prep_bulk_exp(req, rdpg->rp_npages, 1,
1098 PTLRPC_BULK_PUT_SOURCE |
1099 PTLRPC_BULK_BUF_KIOV,
1101 &ptlrpc_bulk_kiov_pin_ops);
1105 if (!(exp_connect_flags(exp) & OBD_CONNECT_BRW_SIZE))
1106 /* old client requires reply size in it's PAGE_SIZE,
1107 * which is rdpg->rp_count */
1108 nob = rdpg->rp_count;
1110 for (i = 0, tmpcount = nob; i < rdpg->rp_npages && tmpcount > 0;
1111 i++, tmpcount -= tmpsize) {
1112 tmpsize = min_t(int, tmpcount, PAGE_SIZE);
1113 desc->bd_frag_ops->add_kiov_frag(desc, rdpg->rp_pages[i], 0,
1117 LASSERT(desc->bd_nob == nob);
1118 rc = target_bulk_io(exp, desc, lwi);
1119 ptlrpc_free_bulk(desc);
1122 EXPORT_SYMBOL(tgt_sendpage);
1125 * OBD_IDX_READ handler
1127 static int tgt_obd_idx_read(struct tgt_session_info *tsi)
1129 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
1130 struct lu_rdpg *rdpg = &tti->tti_u.rdpg.tti_rdpg;
1131 struct idx_info *req_ii, *rep_ii;
1136 memset(rdpg, 0, sizeof(*rdpg));
1137 req_capsule_set(tsi->tsi_pill, &RQF_OBD_IDX_READ);
1139 /* extract idx_info buffer from request & reply */
1140 req_ii = req_capsule_client_get(tsi->tsi_pill, &RMF_IDX_INFO);
1141 if (req_ii == NULL || req_ii->ii_magic != IDX_INFO_MAGIC)
1142 RETURN(err_serious(-EPROTO));
1144 rc = req_capsule_server_pack(tsi->tsi_pill);
1146 RETURN(err_serious(rc));
1148 rep_ii = req_capsule_server_get(tsi->tsi_pill, &RMF_IDX_INFO);
1150 RETURN(err_serious(-EFAULT));
1151 rep_ii->ii_magic = IDX_INFO_MAGIC;
1153 /* extract hash to start with */
1154 rdpg->rp_hash = req_ii->ii_hash_start;
1156 /* extract requested attributes */
1157 rdpg->rp_attrs = req_ii->ii_attrs;
1159 /* check that fid packed in request is valid and supported */
1160 if (!fid_is_sane(&req_ii->ii_fid))
1162 rep_ii->ii_fid = req_ii->ii_fid;
1165 rep_ii->ii_flags = req_ii->ii_flags;
1167 /* compute number of pages to allocate, ii_count is the number of 4KB
1169 if (req_ii->ii_count <= 0)
1170 GOTO(out, rc = -EFAULT);
1171 rdpg->rp_count = min_t(unsigned int, req_ii->ii_count << LU_PAGE_SHIFT,
1172 exp_max_brw_size(tsi->tsi_exp));
1173 rdpg->rp_npages = (rdpg->rp_count + PAGE_SIZE - 1) >> PAGE_SHIFT;
1175 /* allocate pages to store the containers */
1176 OBD_ALLOC(rdpg->rp_pages, rdpg->rp_npages * sizeof(rdpg->rp_pages[0]));
1177 if (rdpg->rp_pages == NULL)
1178 GOTO(out, rc = -ENOMEM);
1179 for (i = 0; i < rdpg->rp_npages; i++) {
1180 rdpg->rp_pages[i] = alloc_page(GFP_NOFS);
1181 if (rdpg->rp_pages[i] == NULL)
1182 GOTO(out, rc = -ENOMEM);
1185 /* populate pages with key/record pairs */
1186 rc = dt_index_read(tsi->tsi_env, tsi->tsi_tgt->lut_bottom, rep_ii, rdpg);
1190 LASSERTF(rc <= rdpg->rp_count, "dt_index_read() returned more than "
1191 "asked %d > %d\n", rc, rdpg->rp_count);
1193 /* send pages to client */
1194 rc = tgt_sendpage(tsi, rdpg, rc);
1199 if (rdpg->rp_pages) {
1200 for (i = 0; i < rdpg->rp_npages; i++)
1201 if (rdpg->rp_pages[i])
1202 __free_page(rdpg->rp_pages[i]);
1203 OBD_FREE(rdpg->rp_pages,
1204 rdpg->rp_npages * sizeof(rdpg->rp_pages[0]));
1209 struct tgt_handler tgt_obd_handlers[] = {
1210 TGT_OBD_HDL (0, OBD_PING, tgt_obd_ping),
1211 TGT_OBD_HDL (0, OBD_IDX_READ, tgt_obd_idx_read)
1213 EXPORT_SYMBOL(tgt_obd_handlers);
1215 int tgt_sync(const struct lu_env *env, struct lu_target *tgt,
1216 struct dt_object *obj, __u64 start, __u64 end)
1222 /* if no objid is specified, it means "sync whole filesystem" */
1224 rc = dt_sync(env, tgt->lut_bottom);
1225 } else if (dt_version_get(env, obj) >
1226 tgt->lut_obd->obd_last_committed) {
1227 rc = dt_object_sync(env, obj, start, end);
1229 atomic_inc(&tgt->lut_sync_count);
1233 EXPORT_SYMBOL(tgt_sync);
1235 * Unified target DLM handlers.
1239 * Unified target BAST
1241 * Ensure data and metadata are synced to disk when lock is canceled if Sync on
1242 * Cancel (SOC) is enabled. If it's extent lock, normally sync obj is enough,
1243 * but if it's cross-MDT lock, because remote object version is not set, a
1244 * filesystem sync is needed.
1246 * \param lock server side lock
1247 * \param desc lock desc
1248 * \param data ldlm_cb_set_arg
1249 * \param flag indicates whether this cancelling or blocking callback
1250 * \retval 0 on success
1251 * \retval negative number on error
1253 static int tgt_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
1254 void *data, int flag)
1257 struct lu_target *tgt;
1258 struct dt_object *obj = NULL;
1264 tgt = class_exp2tgt(lock->l_export);
1266 if (unlikely(tgt == NULL)) {
1267 CDEBUG(D_ERROR, "%s: No target for connected export\n",
1268 class_exp2obd(lock->l_export)->obd_name);
1272 if (flag == LDLM_CB_CANCELING &&
1273 (lock->l_granted_mode & (LCK_EX | LCK_PW | LCK_GROUP)) &&
1274 (tgt->lut_sync_lock_cancel == ALWAYS_SYNC_ON_CANCEL ||
1275 (tgt->lut_sync_lock_cancel == BLOCKING_SYNC_ON_CANCEL &&
1276 ldlm_is_cbpending(lock))) &&
1277 ((exp_connect_flags(lock->l_export) & OBD_CONNECT_MDS_MDS) ||
1278 lock->l_resource->lr_type == LDLM_EXTENT)) {
1280 __u64 end = OBD_OBJECT_EOF;
1282 rc = lu_env_init(&env, LCT_DT_THREAD);
1283 if (unlikely(rc != 0))
1286 ost_fid_from_resid(&fid, &lock->l_resource->lr_name,
1287 tgt->lut_lsd.lsd_osd_index);
1289 if (lock->l_resource->lr_type == LDLM_EXTENT) {
1290 obj = dt_locate(&env, tgt->lut_bottom, &fid);
1292 GOTO(err_env, rc = PTR_ERR(obj));
1294 if (!dt_object_exists(obj))
1295 GOTO(err_put, rc = -ENOENT);
1297 start = lock->l_policy_data.l_extent.start;
1298 end = lock->l_policy_data.l_extent.end;
1301 rc = tgt_sync(&env, tgt, obj, start, end);
1303 CERROR("%s: syncing "DFID" (%llu-%llu) on lock "
1304 "cancel: rc = %d\n",
1305 tgt_name(tgt), PFID(&fid),
1306 lock->l_policy_data.l_extent.start,
1307 lock->l_policy_data.l_extent.end, rc);
1311 dt_object_put(&env, obj);
1316 rc = ldlm_server_blocking_ast(lock, desc, data, flag);
1320 static struct ldlm_callback_suite tgt_dlm_cbs = {
1321 .lcs_completion = ldlm_server_completion_ast,
1322 .lcs_blocking = tgt_blocking_ast,
1323 .lcs_glimpse = ldlm_server_glimpse_ast
1326 int tgt_enqueue(struct tgt_session_info *tsi)
1328 struct ptlrpc_request *req = tgt_ses_req(tsi);
1333 * tsi->tsi_dlm_req was already swapped and (if necessary) converted,
1334 * tsi->tsi_dlm_cbs was set by the *_req_handle() function.
1336 LASSERT(tsi->tsi_dlm_req != NULL);
1337 rc = ldlm_handle_enqueue0(tsi->tsi_exp->exp_obd->obd_namespace, req,
1338 tsi->tsi_dlm_req, &tgt_dlm_cbs);
1340 RETURN(err_serious(rc));
1342 switch (LUT_FAIL_CLASS(tsi->tsi_reply_fail_id)) {
1344 tsi->tsi_reply_fail_id = OBD_FAIL_MDS_LDLM_REPLY_NET;
1347 tsi->tsi_reply_fail_id = OBD_FAIL_OST_LDLM_REPLY_NET;
1350 tsi->tsi_reply_fail_id = OBD_FAIL_MGS_LDLM_REPLY_NET;
1353 tsi->tsi_reply_fail_id = OBD_FAIL_LDLM_REPLY;
1356 RETURN(req->rq_status);
1358 EXPORT_SYMBOL(tgt_enqueue);
1360 int tgt_convert(struct tgt_session_info *tsi)
1362 struct ptlrpc_request *req = tgt_ses_req(tsi);
1366 LASSERT(tsi->tsi_dlm_req);
1367 rc = ldlm_handle_convert0(req, tsi->tsi_dlm_req);
1369 RETURN(err_serious(rc));
1371 RETURN(req->rq_status);
1374 int tgt_bl_callback(struct tgt_session_info *tsi)
1376 return err_serious(-EOPNOTSUPP);
1379 int tgt_cp_callback(struct tgt_session_info *tsi)
1381 return err_serious(-EOPNOTSUPP);
1384 /* generic LDLM target handler */
1385 struct tgt_handler tgt_dlm_handlers[] = {
1386 TGT_DLM_HDL(HAS_KEY, LDLM_ENQUEUE, tgt_enqueue),
1387 TGT_DLM_HDL(HAS_KEY, LDLM_CONVERT, tgt_convert),
1388 TGT_DLM_HDL_VAR(0, LDLM_BL_CALLBACK, tgt_bl_callback),
1389 TGT_DLM_HDL_VAR(0, LDLM_CP_CALLBACK, tgt_cp_callback)
1391 EXPORT_SYMBOL(tgt_dlm_handlers);
1394 * Unified target LLOG handlers.
1396 int tgt_llog_open(struct tgt_session_info *tsi)
1402 rc = llog_origin_handle_open(tgt_ses_req(tsi));
1406 EXPORT_SYMBOL(tgt_llog_open);
1408 int tgt_llog_read_header(struct tgt_session_info *tsi)
1414 rc = llog_origin_handle_read_header(tgt_ses_req(tsi));
1418 EXPORT_SYMBOL(tgt_llog_read_header);
1420 int tgt_llog_next_block(struct tgt_session_info *tsi)
1426 rc = llog_origin_handle_next_block(tgt_ses_req(tsi));
1430 EXPORT_SYMBOL(tgt_llog_next_block);
1432 int tgt_llog_prev_block(struct tgt_session_info *tsi)
1438 rc = llog_origin_handle_prev_block(tgt_ses_req(tsi));
1442 EXPORT_SYMBOL(tgt_llog_prev_block);
1444 /* generic llog target handler */
1445 struct tgt_handler tgt_llog_handlers[] = {
1446 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_CREATE, tgt_llog_open),
1447 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_NEXT_BLOCK, tgt_llog_next_block),
1448 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_READ_HEADER, tgt_llog_read_header),
1449 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_PREV_BLOCK, tgt_llog_prev_block),
1451 EXPORT_SYMBOL(tgt_llog_handlers);
1454 * sec context handlers
1456 /* XXX: Implement based on mdt_sec_ctx_handle()? */
1457 static int tgt_sec_ctx_handle(struct tgt_session_info *tsi)
1462 struct tgt_handler tgt_sec_ctx_handlers[] = {
1463 TGT_SEC_HDL_VAR(0, SEC_CTX_INIT, tgt_sec_ctx_handle),
1464 TGT_SEC_HDL_VAR(0, SEC_CTX_INIT_CONT, tgt_sec_ctx_handle),
1465 TGT_SEC_HDL_VAR(0, SEC_CTX_FINI, tgt_sec_ctx_handle),
1467 EXPORT_SYMBOL(tgt_sec_ctx_handlers);
1469 int (*tgt_lfsck_in_notify_local)(const struct lu_env *env,
1470 struct dt_device *key,
1471 struct lfsck_req_local *lrl,
1472 struct thandle *th) = NULL;
1474 void tgt_register_lfsck_in_notify_local(int (*notify)(const struct lu_env *,
1476 struct lfsck_req_local *,
1479 tgt_lfsck_in_notify_local = notify;
1481 EXPORT_SYMBOL(tgt_register_lfsck_in_notify_local);
1483 int (*tgt_lfsck_in_notify)(const struct lu_env *env,
1484 struct dt_device *key,
1485 struct lfsck_request *lr) = NULL;
1487 void tgt_register_lfsck_in_notify(int (*notify)(const struct lu_env *,
1489 struct lfsck_request *))
1491 tgt_lfsck_in_notify = notify;
1493 EXPORT_SYMBOL(tgt_register_lfsck_in_notify);
1495 static int (*tgt_lfsck_query)(const struct lu_env *env,
1496 struct dt_device *key,
1497 struct lfsck_request *req,
1498 struct lfsck_reply *rep,
1499 struct lfsck_query *que) = NULL;
1501 void tgt_register_lfsck_query(int (*query)(const struct lu_env *,
1503 struct lfsck_request *,
1504 struct lfsck_reply *,
1505 struct lfsck_query *))
1507 tgt_lfsck_query = query;
1509 EXPORT_SYMBOL(tgt_register_lfsck_query);
1511 /* LFSCK request handlers */
1512 static int tgt_handle_lfsck_notify(struct tgt_session_info *tsi)
1514 const struct lu_env *env = tsi->tsi_env;
1515 struct dt_device *key = tsi->tsi_tgt->lut_bottom;
1516 struct lfsck_request *lr;
1520 lr = req_capsule_client_get(tsi->tsi_pill, &RMF_LFSCK_REQUEST);
1524 rc = tgt_lfsck_in_notify(env, key, lr);
1529 static int tgt_handle_lfsck_query(struct tgt_session_info *tsi)
1531 struct lfsck_request *request;
1532 struct lfsck_reply *reply;
1536 request = req_capsule_client_get(tsi->tsi_pill, &RMF_LFSCK_REQUEST);
1537 if (request == NULL)
1540 reply = req_capsule_server_get(tsi->tsi_pill, &RMF_LFSCK_REPLY);
1544 rc = tgt_lfsck_query(tsi->tsi_env, tsi->tsi_tgt->lut_bottom,
1545 request, reply, NULL);
1547 RETURN(rc < 0 ? rc : 0);
1550 struct tgt_handler tgt_lfsck_handlers[] = {
1551 TGT_LFSCK_HDL(HAS_REPLY, LFSCK_NOTIFY, tgt_handle_lfsck_notify),
1552 TGT_LFSCK_HDL(HAS_REPLY, LFSCK_QUERY, tgt_handle_lfsck_query),
1554 EXPORT_SYMBOL(tgt_lfsck_handlers);
1557 * initialize per-thread page pool (bug 5137).
1559 int tgt_io_thread_init(struct ptlrpc_thread *thread)
1561 struct tgt_thread_big_cache *tbc;
1565 LASSERT(thread != NULL);
1566 LASSERT(thread->t_data == NULL);
1568 OBD_ALLOC_LARGE(tbc, sizeof(*tbc));
1571 thread->t_data = tbc;
1574 EXPORT_SYMBOL(tgt_io_thread_init);
1577 * free per-thread pool created by tgt_thread_init().
1579 void tgt_io_thread_done(struct ptlrpc_thread *thread)
1581 struct tgt_thread_big_cache *tbc;
1585 LASSERT(thread != NULL);
1588 * be prepared to handle partially-initialized pools (because this is
1589 * called from ost_io_thread_init() for cleanup.
1591 tbc = thread->t_data;
1593 OBD_FREE_LARGE(tbc, sizeof(*tbc));
1594 thread->t_data = NULL;
1598 EXPORT_SYMBOL(tgt_io_thread_done);
1601 * Helper function for getting Data-on-MDT file server DLM lock
1602 * if asked by client.
1604 int tgt_mdt_data_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
1605 struct lustre_handle *lh, int mode, __u64 *flags)
1607 union ldlm_policy_data policy = {
1608 .l_inodebits.bits = MDS_INODELOCK_DOM,
1614 LASSERT(lh != NULL);
1615 LASSERT(ns != NULL);
1616 LASSERT(!lustre_handle_is_used(lh));
1618 rc = ldlm_cli_enqueue_local(NULL, ns, res_id, LDLM_IBITS, &policy, mode,
1619 flags, ldlm_blocking_ast,
1620 ldlm_completion_ast, ldlm_glimpse_ast,
1621 NULL, 0, LVB_T_NONE, NULL, lh);
1623 RETURN(rc == ELDLM_OK ? 0 : -EIO);
1625 EXPORT_SYMBOL(tgt_mdt_data_lock);
1627 void tgt_mdt_data_unlock(struct lustre_handle *lh, enum ldlm_mode mode)
1629 LASSERT(lustre_handle_is_used(lh));
1630 ldlm_lock_decref(lh, mode);
1632 EXPORT_SYMBOL(tgt_mdt_data_unlock);
1635 * Helper function for getting server side [start, start+count] DLM lock
1636 * if asked by client.
1638 int tgt_extent_lock(const struct lu_env *env, struct ldlm_namespace *ns,
1639 struct ldlm_res_id *res_id, __u64 start, __u64 end,
1640 struct lustre_handle *lh, int mode, __u64 *flags)
1642 union ldlm_policy_data policy;
1647 LASSERT(lh != NULL);
1648 LASSERT(ns != NULL);
1649 LASSERT(!lustre_handle_is_used(lh));
1651 policy.l_extent.gid = 0;
1652 policy.l_extent.start = start & PAGE_MASK;
1655 * If ->o_blocks is EOF it means "lock till the end of the file".
1656 * Otherwise, it's size of an extent or hole being punched (in bytes).
1658 if (end == OBD_OBJECT_EOF || end < start)
1659 policy.l_extent.end = OBD_OBJECT_EOF;
1661 policy.l_extent.end = end | ~PAGE_MASK;
1663 rc = ldlm_cli_enqueue_local(env, ns, res_id, LDLM_EXTENT, &policy,
1664 mode, flags, ldlm_blocking_ast,
1665 ldlm_completion_ast, ldlm_glimpse_ast,
1666 NULL, 0, LVB_T_NONE, NULL, lh);
1667 RETURN(rc == ELDLM_OK ? 0 : -EIO);
1669 EXPORT_SYMBOL(tgt_extent_lock);
1671 void tgt_extent_unlock(struct lustre_handle *lh, enum ldlm_mode mode)
1673 LASSERT(lustre_handle_is_used(lh));
1674 ldlm_lock_decref(lh, mode);
1676 EXPORT_SYMBOL(tgt_extent_unlock);
1678 static int tgt_brw_lock(const struct lu_env *env, struct obd_export *exp,
1679 struct ldlm_res_id *res_id, struct obd_ioobj *obj,
1680 struct niobuf_remote *nb, struct lustre_handle *lh,
1681 enum ldlm_mode mode)
1683 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
1685 int nrbufs = obj->ioo_bufcnt;
1691 LASSERT(mode == LCK_PR || mode == LCK_PW);
1692 LASSERT(!lustre_handle_is_used(lh));
1694 if (ns->ns_obd->obd_recovering)
1697 if (nrbufs == 0 || !(nb[0].rnb_flags & OBD_BRW_SRVLOCK))
1700 for (i = 1; i < nrbufs; i++)
1701 if (!(nb[i].rnb_flags & OBD_BRW_SRVLOCK))
1704 /* MDT IO for data-on-mdt */
1705 if (exp->exp_connect_data.ocd_connect_flags & OBD_CONNECT_IBITS)
1706 rc = tgt_mdt_data_lock(ns, res_id, lh, mode, &flags);
1708 rc = tgt_extent_lock(env, ns, res_id, nb[0].rnb_offset,
1709 nb[nrbufs - 1].rnb_offset +
1710 nb[nrbufs - 1].rnb_len - 1,
1715 static void tgt_brw_unlock(struct obd_ioobj *obj, struct niobuf_remote *niob,
1716 struct lustre_handle *lh, enum ldlm_mode mode)
1720 LASSERT(mode == LCK_PR || mode == LCK_PW);
1721 LASSERT((obj->ioo_bufcnt > 0 &&
1722 (niob[0].rnb_flags & OBD_BRW_SRVLOCK)) ==
1723 lustre_handle_is_used(lh));
1725 if (lustre_handle_is_used(lh))
1726 tgt_extent_unlock(lh, mode);
1729 static int tgt_checksum_niobuf(struct lu_target *tgt,
1730 struct niobuf_local *local_nb, int npages,
1731 int opc, enum cksum_types cksum_type,
1734 struct ahash_request *req;
1735 unsigned int bufsize;
1737 unsigned char cfs_alg = cksum_obd2cfs(cksum_type);
1739 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1741 CERROR("%s: unable to initialize checksum hash %s\n",
1742 tgt_name(tgt), cfs_crypto_hash_name(cfs_alg));
1743 return PTR_ERR(req);
1746 CDEBUG(D_INFO, "Checksum for algo %s\n", cfs_crypto_hash_name(cfs_alg));
1747 for (i = 0; i < npages; i++) {
1748 /* corrupt the data before we compute the checksum, to
1749 * simulate a client->OST data error */
1750 if (i == 0 && opc == OST_WRITE &&
1751 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) {
1752 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
1753 int len = local_nb[i].lnb_len;
1754 struct page *np = tgt_page_to_corrupt;
1757 char *ptr = ll_kmap_atomic(local_nb[i].lnb_page,
1759 char *ptr2 = page_address(np);
1761 memcpy(ptr2 + off, ptr + off, len);
1762 memcpy(ptr2 + off, "bad3", min(4, len));
1763 ll_kunmap_atomic(ptr, KM_USER0);
1765 /* LU-8376 to preserve original index for
1766 * display in dump_all_bulk_pages() */
1769 cfs_crypto_hash_update_page(req, np, off,
1773 CERROR("%s: can't alloc page for corruption\n",
1777 cfs_crypto_hash_update_page(req, local_nb[i].lnb_page,
1778 local_nb[i].lnb_page_offset & ~PAGE_MASK,
1779 local_nb[i].lnb_len);
1781 /* corrupt the data after we compute the checksum, to
1782 * simulate an OST->client data error */
1783 if (i == 0 && opc == OST_READ &&
1784 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND)) {
1785 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
1786 int len = local_nb[i].lnb_len;
1787 struct page *np = tgt_page_to_corrupt;
1790 char *ptr = ll_kmap_atomic(local_nb[i].lnb_page,
1792 char *ptr2 = page_address(np);
1794 memcpy(ptr2 + off, ptr + off, len);
1795 memcpy(ptr2 + off, "bad4", min(4, len));
1796 ll_kunmap_atomic(ptr, KM_USER0);
1798 /* LU-8376 to preserve original index for
1799 * display in dump_all_bulk_pages() */
1802 cfs_crypto_hash_update_page(req, np, off,
1806 CERROR("%s: can't alloc page for corruption\n",
1812 bufsize = sizeof(*cksum);
1813 err = cfs_crypto_hash_final(req, (unsigned char *)cksum, &bufsize);
1818 char dbgcksum_file_name[PATH_MAX];
1820 static void dump_all_bulk_pages(struct obdo *oa, int count,
1821 struct niobuf_local *local_nb,
1822 __u32 server_cksum, __u32 client_cksum)
1829 /* will only keep dump of pages on first error for the same range in
1830 * file/fid, not during the resends/retries. */
1831 snprintf(dbgcksum_file_name, sizeof(dbgcksum_file_name),
1832 "%s-checksum_dump-ost-"DFID":[%llu-%llu]-%x-%x",
1833 (strncmp(libcfs_debug_file_path_arr, "NONE", 4) != 0 ?
1834 libcfs_debug_file_path_arr :
1835 LIBCFS_DEBUG_FILE_PATH_DEFAULT),
1836 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1837 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1838 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1839 local_nb[0].lnb_file_offset,
1840 local_nb[count-1].lnb_file_offset +
1841 local_nb[count-1].lnb_len - 1, client_cksum, server_cksum);
1842 filp = filp_open(dbgcksum_file_name,
1843 O_CREAT | O_EXCL | O_WRONLY | O_LARGEFILE, 0600);
1847 CDEBUG(D_INFO, "%s: can't open to dump pages with "
1848 "checksum error: rc = %d\n", dbgcksum_file_name,
1851 CERROR("%s: can't open to dump pages with checksum "
1852 "error: rc = %d\n", dbgcksum_file_name, rc);
1856 for (i = 0; i < count; i++) {
1857 len = local_nb[i].lnb_len;
1858 buf = kmap(local_nb[i].lnb_page);
1860 rc = cfs_kernel_write(filp, buf, len, &filp->f_pos);
1862 CERROR("%s: wanted to write %u but got %d "
1863 "error\n", dbgcksum_file_name, len, rc);
1868 CDEBUG(D_INFO, "%s: wrote %d bytes\n",
1869 dbgcksum_file_name, rc);
1871 kunmap(local_nb[i].lnb_page);
1874 rc = ll_vfs_fsync_range(filp, 0, LLONG_MAX, 1);
1876 CERROR("%s: sync returns %d\n", dbgcksum_file_name, rc);
1877 filp_close(filp, NULL);
1881 static int check_read_checksum(struct niobuf_local *local_nb, int npages,
1882 struct obd_export *exp, struct obdo *oa,
1883 const struct lnet_process_id *peer,
1884 __u32 client_cksum, __u32 server_cksum,
1885 enum cksum_types server_cksum_type)
1888 enum cksum_types cksum_type;
1891 /* unlikely to happen and only if resend does not occur due to cksum
1892 * control failure on Client */
1893 if (unlikely(server_cksum == client_cksum)) {
1894 CDEBUG(D_PAGE, "checksum %x confirmed upon retry\n",
1899 if (exp->exp_obd->obd_checksum_dump)
1900 dump_all_bulk_pages(oa, npages, local_nb, server_cksum,
1903 cksum_type = obd_cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1906 if (cksum_type != server_cksum_type)
1907 msg = "the server may have not used the checksum type specified"
1908 " in the original request - likely a protocol problem";
1910 msg = "should have changed on the client or in transit";
1912 start = local_nb[0].lnb_file_offset;
1913 end = local_nb[npages-1].lnb_file_offset +
1914 local_nb[npages-1].lnb_len - 1;
1916 LCONSOLE_ERROR_MSG(0x132, "%s: BAD READ CHECKSUM: %s: from %s inode "
1917 DFID " object "DOSTID" extent [%llu-%llu], client returned csum"
1918 " %x (type %x), server csum %x (type %x)\n",
1919 exp->exp_obd->obd_name,
1920 msg, libcfs_nid2str(peer->nid),
1921 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : 0ULL,
1922 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1923 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1925 start, end, client_cksum, cksum_type, server_cksum,
1931 static int tgt_pages2shortio(struct niobuf_local *local, int npages,
1932 unsigned char *buf, int size)
1934 int i, off, len, copied = size;
1937 for (i = 0; i < npages; i++) {
1938 off = local[i].lnb_page_offset & ~PAGE_MASK;
1939 len = local[i].lnb_len;
1941 CDEBUG(D_PAGE, "index %d offset = %d len = %d left = %d\n",
1946 ptr = ll_kmap_atomic(local[i].lnb_page, KM_USER0);
1947 memcpy(buf + off, ptr, len);
1948 ll_kunmap_atomic(ptr, KM_USER0);
1952 return copied - size;
1955 static int tgt_checksum_niobuf_t10pi(struct lu_target *tgt,
1956 struct niobuf_local *local_nb,
1957 int npages, int opc,
1958 obd_dif_csum_fn *fn,
1962 enum cksum_types t10_cksum_type = tgt->lut_dt_conf.ddp_t10_cksum_type;
1963 unsigned char cfs_alg = cksum_obd2cfs(OBD_CKSUM_T10_TOP);
1964 const char *obd_name = tgt->lut_obd->obd_name;
1965 struct ahash_request *req;
1966 unsigned int bufsize;
1967 unsigned char *buffer;
1968 struct page *__page;
1971 int used_number = 0;
1977 __page = alloc_page(GFP_KERNEL);
1981 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1983 CERROR("%s: unable to initialize checksum hash %s\n",
1984 tgt_name(tgt), cfs_crypto_hash_name(cfs_alg));
1985 return PTR_ERR(req);
1988 buffer = kmap(__page);
1989 guard_start = (__u16 *)buffer;
1990 guard_number = PAGE_SIZE / sizeof(*guard_start);
1991 for (i = 0; i < npages; i++) {
1992 /* corrupt the data before we compute the checksum, to
1993 * simulate a client->OST data error */
1994 if (i == 0 && opc == OST_WRITE &&
1995 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) {
1996 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
1997 int len = local_nb[i].lnb_len;
1998 struct page *np = tgt_page_to_corrupt;
2001 char *ptr = ll_kmap_atomic(local_nb[i].lnb_page,
2003 char *ptr2 = page_address(np);
2005 memcpy(ptr2 + off, ptr + off, len);
2006 memcpy(ptr2 + off, "bad3", min(4, len));
2007 ll_kunmap_atomic(ptr, KM_USER0);
2009 /* LU-8376 to preserve original index for
2010 * display in dump_all_bulk_pages() */
2013 cfs_crypto_hash_update_page(req, np, off,
2017 CERROR("%s: can't alloc page for corruption\n",
2023 * The left guard number should be able to hold checksums of a
2026 if (t10_cksum_type && opc == OST_READ &&
2027 local_nb[i].lnb_guard_disk) {
2028 used = DIV_ROUND_UP(local_nb[i].lnb_len, sector_size);
2029 if (used > (guard_number - used_number)) {
2033 memcpy(guard_start + used_number,
2034 local_nb[i].lnb_guards,
2035 used * sizeof(*local_nb[i].lnb_guards));
2037 rc = obd_page_dif_generate_buffer(obd_name,
2038 local_nb[i].lnb_page,
2039 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2040 local_nb[i].lnb_len, guard_start + used_number,
2041 guard_number - used_number, &used, sector_size,
2047 LASSERT(used <= MAX_GUARD_NUMBER);
2049 * If disk support T10PI checksum, copy guards to local_nb.
2050 * If the write is partial page, do not use the guards for bio
2051 * submission since the data might not be full-sector. The bio
2052 * guards will be generated later based on the full sectors. If
2053 * the sector size is 512B rather than 4 KB, or the page size
2054 * is larger than 4KB, this might drop some useful guards for
2055 * partial page write, but it will only add minimal extra time
2056 * of checksum calculation.
2058 if (t10_cksum_type && opc == OST_WRITE &&
2059 local_nb[i].lnb_len == PAGE_SIZE) {
2060 local_nb[i].lnb_guard_rpc = 1;
2061 memcpy(local_nb[i].lnb_guards,
2062 guard_start + used_number,
2063 used * sizeof(*local_nb[i].lnb_guards));
2066 used_number += used;
2067 if (used_number == guard_number) {
2068 cfs_crypto_hash_update_page(req, __page, 0,
2069 used_number * sizeof(*guard_start));
2073 /* corrupt the data after we compute the checksum, to
2074 * simulate an OST->client data error */
2075 if (unlikely(i == 0 && opc == OST_READ &&
2076 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND))) {
2077 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
2078 int len = local_nb[i].lnb_len;
2079 struct page *np = tgt_page_to_corrupt;
2082 char *ptr = ll_kmap_atomic(local_nb[i].lnb_page,
2084 char *ptr2 = page_address(np);
2086 memcpy(ptr2 + off, ptr + off, len);
2087 memcpy(ptr2 + off, "bad4", min(4, len));
2088 ll_kunmap_atomic(ptr, KM_USER0);
2090 /* LU-8376 to preserve original index for
2091 * display in dump_all_bulk_pages() */
2094 cfs_crypto_hash_update_page(req, np, off,
2098 CERROR("%s: can't alloc page for corruption\n",
2107 if (used_number != 0)
2108 cfs_crypto_hash_update_page(req, __page, 0,
2109 used_number * sizeof(*guard_start));
2111 bufsize = sizeof(cksum);
2112 rc = cfs_crypto_hash_final(req, (unsigned char *)&cksum, &bufsize);
2117 __free_page(__page);
2121 static int tgt_checksum_niobuf_rw(struct lu_target *tgt,
2122 enum cksum_types cksum_type,
2123 struct niobuf_local *local_nb,
2124 int npages, int opc, u32 *check_sum)
2126 obd_dif_csum_fn *fn = NULL;
2127 int sector_size = 0;
2131 obd_t10_cksum2dif(cksum_type, &fn, §or_size);
2134 rc = tgt_checksum_niobuf_t10pi(tgt, local_nb, npages,
2135 opc, fn, sector_size,
2138 rc = tgt_checksum_niobuf(tgt, local_nb, npages, opc,
2139 cksum_type, check_sum);
2143 int tgt_brw_read(struct tgt_session_info *tsi)
2145 struct ptlrpc_request *req = tgt_ses_req(tsi);
2146 struct ptlrpc_bulk_desc *desc = NULL;
2147 struct obd_export *exp = tsi->tsi_exp;
2148 struct niobuf_remote *remote_nb;
2149 struct niobuf_local *local_nb;
2150 struct obd_ioobj *ioo;
2151 struct ost_body *body, *repbody;
2152 struct l_wait_info lwi;
2153 struct lustre_handle lockh = { 0 };
2154 int npages, nob = 0, rc, i, no_reply = 0,
2156 struct tgt_thread_big_cache *tbc = req->rq_svc_thread->t_data;
2157 const char *obd_name = exp->exp_obd->obd_name;
2161 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL &&
2162 ptlrpc_req2svc(req)->srv_req_portal != MDS_IO_PORTAL) {
2163 CERROR("%s: deny read request from %s to portal %u\n",
2164 tgt_name(tsi->tsi_tgt),
2165 obd_export_nid2str(req->rq_export),
2166 ptlrpc_req2svc(req)->srv_req_portal);
2170 req->rq_bulk_read = 1;
2172 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_READ_BULK))
2175 OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, cfs_fail_val > 0 ?
2176 cfs_fail_val : (obd_timeout + 1) / 4);
2178 /* Check if there is eviction in progress, and if so, wait for it to
2180 if (unlikely(atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
2181 /* We do not care how long it takes */
2182 lwi = LWI_INTR(NULL, NULL);
2183 rc = l_wait_event(exp->exp_obd->obd_evict_inprogress_waitq,
2184 !atomic_read(&exp->exp_obd->obd_evict_inprogress),
2188 /* There must be big cache in current thread to process this request
2189 * if it is NULL then something went wrong and it wasn't allocated,
2190 * report -ENOMEM in that case */
2194 body = tsi->tsi_ost_body;
2195 LASSERT(body != NULL);
2197 ioo = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_IOOBJ);
2198 LASSERT(ioo != NULL); /* must exists after tgt_ost_body_unpack */
2200 remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
2201 LASSERT(remote_nb != NULL); /* must exists after tgt_ost_body_unpack */
2203 local_nb = tbc->local;
2205 rc = tgt_brw_lock(tsi->tsi_env, exp, &tsi->tsi_resid, ioo, remote_nb,
2211 * If getting the lock took more time than
2212 * client was willing to wait, drop it. b=11330
2214 if (ktime_get_real_seconds() > req->rq_deadline ||
2215 OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
2217 CERROR("Dropping timed-out read from %s because locking object " DOSTID " took %lld seconds (limit was %lld).\n",
2218 libcfs_id2str(req->rq_peer), POSTID(&ioo->ioo_oid),
2219 ktime_get_real_seconds() - req->rq_arrival_time.tv_sec,
2220 req->rq_deadline - req->rq_arrival_time.tv_sec);
2221 GOTO(out_lock, rc = -ETIMEDOUT);
2224 repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
2225 repbody->oa = body->oa;
2227 npages = PTLRPC_MAX_BRW_PAGES;
2228 rc = obd_preprw(tsi->tsi_env, OBD_BRW_READ, exp, &repbody->oa, 1,
2229 ioo, remote_nb, &npages, local_nb);
2233 if (body->oa.o_flags & OBD_FL_SHORT_IO) {
2236 desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
2237 PTLRPC_BULK_PUT_SOURCE |
2238 PTLRPC_BULK_BUF_KIOV,
2240 &ptlrpc_bulk_kiov_nopin_ops);
2242 GOTO(out_commitrw, rc = -ENOMEM);
2246 npages_read = npages;
2247 for (i = 0; i < npages; i++) {
2248 int page_rc = local_nb[i].lnb_rc;
2257 if (page_rc != 0 && desc != NULL) { /* some data! */
2258 LASSERT(local_nb[i].lnb_page != NULL);
2259 desc->bd_frag_ops->add_kiov_frag
2260 (desc, local_nb[i].lnb_page,
2261 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2265 if (page_rc != local_nb[i].lnb_len) { /* short read */
2266 local_nb[i].lnb_len = page_rc;
2267 npages_read = i + (page_rc != 0 ? 1 : 0);
2268 /* All subsequent pages should be 0 */
2269 while (++i < npages)
2270 LASSERT(local_nb[i].lnb_rc == 0);
2274 if (OBD_FAIL_CHECK(OBD_FAIL_OST_READ_SIZE) &&
2275 nob != cfs_fail_val)
2278 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
2279 u32 flag = body->oa.o_valid & OBD_MD_FLFLAGS ?
2280 body->oa.o_flags : 0;
2281 enum cksum_types cksum_type = obd_cksum_type_unpack(flag);
2283 repbody->oa.o_flags = obd_cksum_type_pack(obd_name,
2285 repbody->oa.o_valid = OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
2287 rc = tgt_checksum_niobuf_rw(tsi->tsi_tgt, cksum_type,
2288 local_nb, npages_read, OST_READ,
2289 &repbody->oa.o_cksum);
2291 GOTO(out_commitrw, rc);
2292 CDEBUG(D_PAGE, "checksum at read origin: %x\n",
2293 repbody->oa.o_cksum);
2295 /* if a resend it could be for a cksum error, so check Server
2296 * cksum with returned Client cksum (this should even cover
2297 * zero-cksum case) */
2298 if ((body->oa.o_valid & OBD_MD_FLFLAGS) &&
2299 (body->oa.o_flags & OBD_FL_RECOV_RESEND))
2300 check_read_checksum(local_nb, npages_read, exp,
2301 &body->oa, &req->rq_peer,
2303 repbody->oa.o_cksum, cksum_type);
2305 repbody->oa.o_valid = 0;
2307 /* We're finishing using body->oa as an input variable */
2309 /* Check if client was evicted while we were doing i/o before touching
2312 if (body->oa.o_flags & OBD_FL_SHORT_IO) {
2313 unsigned char *short_io_buf;
2316 short_io_buf = req_capsule_server_get(&req->rq_pill,
2318 short_io_size = req_capsule_get_size(&req->rq_pill,
2321 rc = tgt_pages2shortio(local_nb, npages_read,
2322 short_io_buf, short_io_size);
2324 req_capsule_shrink(&req->rq_pill,
2327 rc = rc > 0 ? 0 : rc;
2328 } else if (!CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)) {
2329 rc = target_bulk_io(exp, desc, &lwi);
2333 if (body->oa.o_flags & OBD_FL_SHORT_IO)
2334 req_capsule_shrink(&req->rq_pill, &RMF_SHORT_IO, 0,
2339 /* Must commit after prep above in all cases */
2340 rc = obd_commitrw(tsi->tsi_env, OBD_BRW_READ, exp, &repbody->oa, 1, ioo,
2341 remote_nb, npages, local_nb, rc);
2343 tgt_brw_unlock(ioo, remote_nb, &lockh, LCK_PR);
2345 if (desc && !CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2))
2346 ptlrpc_free_bulk(desc);
2351 ptlrpc_lprocfs_brw(req, nob);
2352 } else if (no_reply) {
2353 req->rq_no_reply = 1;
2354 /* reply out callback would free */
2355 ptlrpc_req_drop_rs(req);
2356 LCONSOLE_WARN("%s: Bulk IO read error with %s (at %s), "
2357 "client will retry: rc %d\n",
2359 obd_uuid2str(&exp->exp_client_uuid),
2360 obd_export_nid2str(exp), rc);
2362 /* send a bulk after reply to simulate a network delay or reordering
2363 * by a router - Note that !desc implies short io, so there is no bulk
2365 if (unlikely(CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)) &&
2367 wait_queue_head_t waitq;
2368 struct l_wait_info lwi1;
2370 CDEBUG(D_INFO, "reorder BULK\n");
2371 init_waitqueue_head(&waitq);
2373 lwi1 = LWI_TIMEOUT_INTR(cfs_time_seconds(3), NULL, NULL, NULL);
2374 l_wait_event(waitq, 0, &lwi1);
2375 target_bulk_io(exp, desc, &lwi);
2376 ptlrpc_free_bulk(desc);
2381 EXPORT_SYMBOL(tgt_brw_read);
2383 static int tgt_shortio2pages(struct niobuf_local *local, int npages,
2384 unsigned char *buf, int size)
2389 for (i = 0; i < npages; i++) {
2390 off = local[i].lnb_page_offset & ~PAGE_MASK;
2391 len = local[i].lnb_len;
2396 CDEBUG(D_PAGE, "index %d offset = %d len = %d left = %d\n",
2398 ptr = ll_kmap_atomic(local[i].lnb_page, KM_USER0);
2401 memcpy(ptr + off, buf, len < size ? len : size);
2402 ll_kunmap_atomic(ptr, KM_USER0);
2409 static void tgt_warn_on_cksum(struct ptlrpc_request *req,
2410 struct ptlrpc_bulk_desc *desc,
2411 struct niobuf_local *local_nb, int npages,
2412 u32 client_cksum, u32 server_cksum,
2415 struct obd_export *exp = req->rq_export;
2416 struct ost_body *body;
2420 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2421 LASSERT(body != NULL);
2423 if (desc && req->rq_peer.nid != desc->bd_sender) {
2425 router = libcfs_nid2str(desc->bd_sender);
2428 if (exp->exp_obd->obd_checksum_dump)
2429 dump_all_bulk_pages(&body->oa, npages, local_nb, server_cksum,
2433 CDEBUG_LIMIT(D_INFO, "client csum %x, server csum %x\n",
2434 client_cksum, server_cksum);
2438 LCONSOLE_ERROR_MSG(0x168, "%s: BAD WRITE CHECKSUM: from %s%s%s inode "
2439 DFID" object "DOSTID" extent [%llu-%llu"
2440 "]: client csum %x, server csum %x\n",
2441 exp->exp_obd->obd_name, libcfs_id2str(req->rq_peer),
2443 body->oa.o_valid & OBD_MD_FLFID ?
2444 body->oa.o_parent_seq : (__u64)0,
2445 body->oa.o_valid & OBD_MD_FLFID ?
2446 body->oa.o_parent_oid : 0,
2447 body->oa.o_valid & OBD_MD_FLFID ?
2448 body->oa.o_parent_ver : 0,
2449 POSTID(&body->oa.o_oi),
2450 local_nb[0].lnb_file_offset,
2451 local_nb[npages-1].lnb_file_offset +
2452 local_nb[npages - 1].lnb_len - 1,
2453 client_cksum, server_cksum);
2456 int tgt_brw_write(struct tgt_session_info *tsi)
2458 struct ptlrpc_request *req = tgt_ses_req(tsi);
2459 struct ptlrpc_bulk_desc *desc = NULL;
2460 struct obd_export *exp = req->rq_export;
2461 struct niobuf_remote *remote_nb;
2462 struct niobuf_local *local_nb;
2463 struct obd_ioobj *ioo;
2464 struct ost_body *body, *repbody;
2465 struct l_wait_info lwi;
2466 struct lustre_handle lockh = {0};
2468 int objcount, niocount, npages;
2470 enum cksum_types cksum_type = OBD_CKSUM_CRC32;
2471 bool no_reply = false, mmap;
2472 struct tgt_thread_big_cache *tbc = req->rq_svc_thread->t_data;
2473 bool wait_sync = false;
2474 const char *obd_name = exp->exp_obd->obd_name;
2478 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL &&
2479 ptlrpc_req2svc(req)->srv_req_portal != MDS_IO_PORTAL) {
2480 CERROR("%s: deny write request from %s to portal %u\n",
2481 tgt_name(tsi->tsi_tgt),
2482 obd_export_nid2str(req->rq_export),
2483 ptlrpc_req2svc(req)->srv_req_portal);
2484 RETURN(err_serious(-EPROTO));
2487 if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOSPC))
2488 RETURN(err_serious(-ENOSPC));
2489 if (OBD_FAIL_TIMEOUT(OBD_FAIL_OST_EROFS, 1))
2490 RETURN(err_serious(-EROFS));
2492 req->rq_bulk_write = 1;
2494 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
2495 RETURN(err_serious(-EIO));
2496 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK2))
2497 RETURN(err_serious(-EFAULT));
2499 /* pause before transaction has been started */
2500 CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, cfs_fail_val > 0 ?
2501 cfs_fail_val : (obd_timeout + 1) / 4);
2503 /* There must be big cache in current thread to process this request
2504 * if it is NULL then something went wrong and it wasn't allocated,
2505 * report -ENOMEM in that case */
2509 body = tsi->tsi_ost_body;
2510 LASSERT(body != NULL);
2512 ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
2513 LASSERT(ioo != NULL); /* must exists after tgt_ost_body_unpack */
2515 objcount = req_capsule_get_size(&req->rq_pill, &RMF_OBD_IOOBJ,
2516 RCL_CLIENT) / sizeof(*ioo);
2518 for (niocount = i = 0; i < objcount; i++)
2519 niocount += ioo[i].ioo_bufcnt;
2521 remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
2522 LASSERT(remote_nb != NULL); /* must exists after tgt_ost_body_unpack */
2523 if (niocount != req_capsule_get_size(&req->rq_pill,
2524 &RMF_NIOBUF_REMOTE, RCL_CLIENT) /
2526 RETURN(err_serious(-EPROTO));
2528 if ((remote_nb[0].rnb_flags & OBD_BRW_MEMALLOC) &&
2529 ptlrpc_connection_is_local(exp->exp_connection))
2530 memory_pressure_set();
2532 req_capsule_set_size(&req->rq_pill, &RMF_RCS, RCL_SERVER,
2533 niocount * sizeof(*rcs));
2534 rc = req_capsule_server_pack(&req->rq_pill);
2536 GOTO(out, rc = err_serious(rc));
2538 CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_PACK, cfs_fail_val);
2539 rcs = req_capsule_server_get(&req->rq_pill, &RMF_RCS);
2541 local_nb = tbc->local;
2543 rc = tgt_brw_lock(tsi->tsi_env, exp, &tsi->tsi_resid, ioo, remote_nb,
2549 * If getting the lock took more time than
2550 * client was willing to wait, drop it. b=11330
2552 if (ktime_get_real_seconds() > req->rq_deadline ||
2553 OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
2555 CERROR("%s: Dropping timed-out write from %s because locking object " DOSTID " took %lld seconds (limit was %lld).\n",
2556 tgt_name(tsi->tsi_tgt), libcfs_id2str(req->rq_peer),
2557 POSTID(&ioo->ioo_oid),
2558 ktime_get_real_seconds() - req->rq_arrival_time.tv_sec,
2559 req->rq_deadline - req->rq_arrival_time.tv_sec);
2560 GOTO(out_lock, rc = -ETIMEDOUT);
2563 /* Because we already sync grant info with client when reconnect,
2564 * grant info will be cleared for resent req, then fed_grant and
2565 * total_grant will not be modified in following preprw_write */
2566 if (lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY)) {
2567 DEBUG_REQ(D_CACHE, req, "clear resent/replay req grant info");
2568 body->oa.o_valid &= ~OBD_MD_FLGRANT;
2571 repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
2572 if (repbody == NULL)
2573 GOTO(out_lock, rc = -ENOMEM);
2574 repbody->oa = body->oa;
2576 npages = PTLRPC_MAX_BRW_PAGES;
2577 rc = obd_preprw(tsi->tsi_env, OBD_BRW_WRITE, exp, &repbody->oa,
2578 objcount, ioo, remote_nb, &npages, local_nb);
2581 if (body->oa.o_flags & OBD_FL_SHORT_IO) {
2583 unsigned char *short_io_buf;
2585 short_io_size = req_capsule_get_size(&req->rq_pill,
2588 short_io_buf = req_capsule_client_get(&req->rq_pill,
2590 CDEBUG(D_INFO, "Client use short io for data transfer,"
2591 " size = %d\n", short_io_size);
2593 /* Copy short io buf to pages */
2594 rc = tgt_shortio2pages(local_nb, npages, short_io_buf,
2598 desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
2599 PTLRPC_BULK_GET_SINK |
2600 PTLRPC_BULK_BUF_KIOV,
2602 &ptlrpc_bulk_kiov_nopin_ops);
2604 GOTO(skip_transfer, rc = -ENOMEM);
2606 /* NB Having prepped, we must commit... */
2607 for (i = 0; i < npages; i++)
2608 desc->bd_frag_ops->add_kiov_frag(desc,
2609 local_nb[i].lnb_page,
2610 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2611 local_nb[i].lnb_len);
2613 rc = sptlrpc_svc_prep_bulk(req, desc);
2615 GOTO(skip_transfer, rc);
2617 rc = target_bulk_io(exp, desc, &lwi);
2623 if (body->oa.o_valid & OBD_MD_FLCKSUM && rc == 0) {
2624 static int cksum_counter;
2626 if (body->oa.o_valid & OBD_MD_FLFLAGS)
2627 cksum_type = obd_cksum_type_unpack(body->oa.o_flags);
2629 repbody->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
2630 repbody->oa.o_flags &= ~OBD_FL_CKSUM_ALL;
2631 repbody->oa.o_flags |= obd_cksum_type_pack(obd_name,
2634 rc = tgt_checksum_niobuf_rw(tsi->tsi_tgt, cksum_type,
2635 local_nb, npages, OST_WRITE,
2636 &repbody->oa.o_cksum);
2638 GOTO(out_commitrw, rc);
2642 if (unlikely(body->oa.o_cksum != repbody->oa.o_cksum)) {
2643 mmap = (body->oa.o_valid & OBD_MD_FLFLAGS &&
2644 body->oa.o_flags & OBD_FL_MMAP);
2646 tgt_warn_on_cksum(req, desc, local_nb, npages,
2648 repbody->oa.o_cksum, mmap);
2650 } else if ((cksum_counter & (-cksum_counter)) ==
2652 CDEBUG(D_INFO, "Checksum %u from %s OK: %x\n",
2653 cksum_counter, libcfs_id2str(req->rq_peer),
2654 repbody->oa.o_cksum);
2659 /* Must commit after prep above in all cases */
2660 rc = obd_commitrw(tsi->tsi_env, OBD_BRW_WRITE, exp, &repbody->oa,
2661 objcount, ioo, remote_nb, npages, local_nb, rc);
2662 if (rc == -ENOTCONN)
2663 /* quota acquire process has been given up because
2664 * either the client has been evicted or the client
2665 * has timed out the request already */
2668 for (i = 0; i < niocount; i++) {
2669 if (!(local_nb[i].lnb_flags & OBD_BRW_ASYNC)) {
2675 * Disable sending mtime back to the client. If the client locked the
2676 * whole object, then it has already updated the mtime on its side,
2677 * otherwise it will have to glimpse anyway (see bug 21489, comment 32)
2679 repbody->oa.o_valid &= ~(OBD_MD_FLMTIME | OBD_MD_FLATIME);
2684 /* set per-requested niobuf return codes */
2685 for (i = j = 0; i < niocount; i++) {
2686 int len = remote_nb[i].rnb_len;
2691 LASSERT(j < npages);
2692 if (local_nb[j].lnb_rc < 0)
2693 rcs[i] = local_nb[j].lnb_rc;
2694 len -= local_nb[j].lnb_len;
2699 LASSERT(j == npages);
2700 ptlrpc_lprocfs_brw(req, nob);
2703 tgt_brw_unlock(ioo, remote_nb, &lockh, LCK_PW);
2705 ptlrpc_free_bulk(desc);
2707 if (unlikely(no_reply || (exp->exp_obd->obd_no_transno && wait_sync))) {
2708 req->rq_no_reply = 1;
2709 /* reply out callback would free */
2710 ptlrpc_req_drop_rs(req);
2711 if (!exp->exp_obd->obd_no_transno)
2712 LCONSOLE_WARN("%s: Bulk IO write error with %s (at %s),"
2713 " client will retry: rc = %d\n",
2715 obd_uuid2str(&exp->exp_client_uuid),
2716 obd_export_nid2str(exp), rc);
2718 memory_pressure_clr();
2721 EXPORT_SYMBOL(tgt_brw_write);
2723 /* Check if request can be reconstructed from saved reply data
2724 * A copy of the reply data is returned in @trd if the pointer is not NULL
2726 bool req_can_reconstruct(struct ptlrpc_request *req,
2727 struct tg_reply_data *trd)
2729 struct tg_export_data *ted = &req->rq_export->exp_target_data;
2730 struct lsd_client_data *lcd = ted->ted_lcd;
2733 if (tgt_is_multimodrpcs_client(req->rq_export))
2734 return tgt_lookup_reply(req, trd);
2736 mutex_lock(&ted->ted_lcd_lock);
2737 found = req->rq_xid == lcd->lcd_last_xid ||
2738 req->rq_xid == lcd->lcd_last_close_xid;
2740 if (found && trd != NULL) {
2741 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE) {
2742 trd->trd_reply.lrd_xid = lcd->lcd_last_close_xid;
2743 trd->trd_reply.lrd_transno =
2744 lcd->lcd_last_close_transno;
2745 trd->trd_reply.lrd_result = lcd->lcd_last_close_result;
2747 trd->trd_reply.lrd_xid = lcd->lcd_last_xid;
2748 trd->trd_reply.lrd_transno = lcd->lcd_last_transno;
2749 trd->trd_reply.lrd_result = lcd->lcd_last_result;
2750 trd->trd_reply.lrd_data = lcd->lcd_last_data;
2751 trd->trd_pre_versions[0] = lcd->lcd_pre_versions[0];
2752 trd->trd_pre_versions[1] = lcd->lcd_pre_versions[1];
2753 trd->trd_pre_versions[2] = lcd->lcd_pre_versions[2];
2754 trd->trd_pre_versions[3] = lcd->lcd_pre_versions[3];
2757 mutex_unlock(&ted->ted_lcd_lock);
2761 EXPORT_SYMBOL(req_can_reconstruct);