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);
1000 if (strcmp(tsi->tsi_exp->exp_obd->obd_type->typ_name,
1001 LUSTRE_MDT_NAME) == 0) {
1002 rc = req_check_sepol(tsi->tsi_pill);
1009 obd_disconnect(class_export_get(tsi->tsi_exp));
1012 EXPORT_SYMBOL(tgt_connect);
1014 int tgt_disconnect(struct tgt_session_info *tsi)
1020 OBD_FAIL_TIMEOUT(OBD_FAIL_OST_DISCONNECT_DELAY, cfs_fail_val);
1022 rc = target_handle_disconnect(tgt_ses_req(tsi));
1024 RETURN(err_serious(rc));
1028 EXPORT_SYMBOL(tgt_disconnect);
1031 * Unified target OBD handlers
1033 int tgt_obd_ping(struct tgt_session_info *tsi)
1039 /* The target-specific part of OBD_PING request handling.
1040 * It controls Filter Modification Data (FMD) expiration each time
1043 * Valid only for replayable targets, e.g. MDT and OFD
1045 if (tsi->tsi_exp->exp_obd->obd_replayable)
1046 tgt_fmd_expire(tsi->tsi_exp);
1048 rc = req_capsule_server_pack(tsi->tsi_pill);
1050 RETURN(err_serious(rc));
1054 EXPORT_SYMBOL(tgt_obd_ping);
1056 int tgt_obd_log_cancel(struct tgt_session_info *tsi)
1058 return err_serious(-EOPNOTSUPP);
1061 int tgt_send_buffer(struct tgt_session_info *tsi, struct lu_rdbuf *rdbuf)
1063 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
1064 struct ptlrpc_request *req = tgt_ses_req(tsi);
1065 struct obd_export *exp = req->rq_export;
1066 struct ptlrpc_bulk_desc *desc;
1067 struct l_wait_info *lwi = &tti->tti_u.update.tti_wait_info;
1073 desc = ptlrpc_prep_bulk_exp(req, rdbuf->rb_nbufs, 1,
1074 PTLRPC_BULK_PUT_SOURCE | PTLRPC_BULK_BUF_KVEC,
1075 MDS_BULK_PORTAL, &ptlrpc_bulk_kvec_ops);
1079 for (i = 0; i < rdbuf->rb_nbufs; i++)
1080 desc->bd_frag_ops->add_iov_frag(desc,
1081 rdbuf->rb_bufs[i].lb_buf,
1082 rdbuf->rb_bufs[i].lb_len);
1084 rc = target_bulk_io(exp, desc, lwi);
1085 ptlrpc_free_bulk(desc);
1088 EXPORT_SYMBOL(tgt_send_buffer);
1090 int tgt_sendpage(struct tgt_session_info *tsi, struct lu_rdpg *rdpg, int nob)
1092 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
1093 struct ptlrpc_request *req = tgt_ses_req(tsi);
1094 struct obd_export *exp = req->rq_export;
1095 struct ptlrpc_bulk_desc *desc;
1096 struct l_wait_info *lwi = &tti->tti_u.rdpg.tti_wait_info;
1104 desc = ptlrpc_prep_bulk_exp(req, rdpg->rp_npages, 1,
1105 PTLRPC_BULK_PUT_SOURCE |
1106 PTLRPC_BULK_BUF_KIOV,
1108 &ptlrpc_bulk_kiov_pin_ops);
1112 if (!(exp_connect_flags(exp) & OBD_CONNECT_BRW_SIZE))
1113 /* old client requires reply size in it's PAGE_SIZE,
1114 * which is rdpg->rp_count */
1115 nob = rdpg->rp_count;
1117 for (i = 0, tmpcount = nob; i < rdpg->rp_npages && tmpcount > 0;
1118 i++, tmpcount -= tmpsize) {
1119 tmpsize = min_t(int, tmpcount, PAGE_SIZE);
1120 desc->bd_frag_ops->add_kiov_frag(desc, rdpg->rp_pages[i], 0,
1124 LASSERT(desc->bd_nob == nob);
1125 rc = target_bulk_io(exp, desc, lwi);
1126 ptlrpc_free_bulk(desc);
1129 EXPORT_SYMBOL(tgt_sendpage);
1132 * OBD_IDX_READ handler
1134 static int tgt_obd_idx_read(struct tgt_session_info *tsi)
1136 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
1137 struct lu_rdpg *rdpg = &tti->tti_u.rdpg.tti_rdpg;
1138 struct idx_info *req_ii, *rep_ii;
1143 memset(rdpg, 0, sizeof(*rdpg));
1144 req_capsule_set(tsi->tsi_pill, &RQF_OBD_IDX_READ);
1146 /* extract idx_info buffer from request & reply */
1147 req_ii = req_capsule_client_get(tsi->tsi_pill, &RMF_IDX_INFO);
1148 if (req_ii == NULL || req_ii->ii_magic != IDX_INFO_MAGIC)
1149 RETURN(err_serious(-EPROTO));
1151 rc = req_capsule_server_pack(tsi->tsi_pill);
1153 RETURN(err_serious(rc));
1155 rep_ii = req_capsule_server_get(tsi->tsi_pill, &RMF_IDX_INFO);
1157 RETURN(err_serious(-EFAULT));
1158 rep_ii->ii_magic = IDX_INFO_MAGIC;
1160 /* extract hash to start with */
1161 rdpg->rp_hash = req_ii->ii_hash_start;
1163 /* extract requested attributes */
1164 rdpg->rp_attrs = req_ii->ii_attrs;
1166 /* check that fid packed in request is valid and supported */
1167 if (!fid_is_sane(&req_ii->ii_fid))
1169 rep_ii->ii_fid = req_ii->ii_fid;
1172 rep_ii->ii_flags = req_ii->ii_flags;
1174 /* compute number of pages to allocate, ii_count is the number of 4KB
1176 if (req_ii->ii_count <= 0)
1177 GOTO(out, rc = -EFAULT);
1178 rdpg->rp_count = min_t(unsigned int, req_ii->ii_count << LU_PAGE_SHIFT,
1179 exp_max_brw_size(tsi->tsi_exp));
1180 rdpg->rp_npages = (rdpg->rp_count + PAGE_SIZE - 1) >> PAGE_SHIFT;
1182 /* allocate pages to store the containers */
1183 OBD_ALLOC(rdpg->rp_pages, rdpg->rp_npages * sizeof(rdpg->rp_pages[0]));
1184 if (rdpg->rp_pages == NULL)
1185 GOTO(out, rc = -ENOMEM);
1186 for (i = 0; i < rdpg->rp_npages; i++) {
1187 rdpg->rp_pages[i] = alloc_page(GFP_NOFS);
1188 if (rdpg->rp_pages[i] == NULL)
1189 GOTO(out, rc = -ENOMEM);
1192 /* populate pages with key/record pairs */
1193 rc = dt_index_read(tsi->tsi_env, tsi->tsi_tgt->lut_bottom, rep_ii, rdpg);
1197 LASSERTF(rc <= rdpg->rp_count, "dt_index_read() returned more than "
1198 "asked %d > %d\n", rc, rdpg->rp_count);
1200 /* send pages to client */
1201 rc = tgt_sendpage(tsi, rdpg, rc);
1206 if (rdpg->rp_pages) {
1207 for (i = 0; i < rdpg->rp_npages; i++)
1208 if (rdpg->rp_pages[i])
1209 __free_page(rdpg->rp_pages[i]);
1210 OBD_FREE(rdpg->rp_pages,
1211 rdpg->rp_npages * sizeof(rdpg->rp_pages[0]));
1216 struct tgt_handler tgt_obd_handlers[] = {
1217 TGT_OBD_HDL (0, OBD_PING, tgt_obd_ping),
1218 TGT_OBD_HDL (0, OBD_IDX_READ, tgt_obd_idx_read)
1220 EXPORT_SYMBOL(tgt_obd_handlers);
1222 int tgt_sync(const struct lu_env *env, struct lu_target *tgt,
1223 struct dt_object *obj, __u64 start, __u64 end)
1229 /* if no objid is specified, it means "sync whole filesystem" */
1231 rc = dt_sync(env, tgt->lut_bottom);
1232 } else if (dt_version_get(env, obj) >
1233 tgt->lut_obd->obd_last_committed) {
1234 rc = dt_object_sync(env, obj, start, end);
1236 atomic_inc(&tgt->lut_sync_count);
1240 EXPORT_SYMBOL(tgt_sync);
1242 * Unified target DLM handlers.
1246 * Unified target BAST
1248 * Ensure data and metadata are synced to disk when lock is canceled if Sync on
1249 * Cancel (SOC) is enabled. If it's extent lock, normally sync obj is enough,
1250 * but if it's cross-MDT lock, because remote object version is not set, a
1251 * filesystem sync is needed.
1253 * \param lock server side lock
1254 * \param desc lock desc
1255 * \param data ldlm_cb_set_arg
1256 * \param flag indicates whether this cancelling or blocking callback
1257 * \retval 0 on success
1258 * \retval negative number on error
1260 static int tgt_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
1261 void *data, int flag)
1264 struct lu_target *tgt;
1265 struct dt_object *obj = NULL;
1271 tgt = class_exp2tgt(lock->l_export);
1273 if (unlikely(tgt == NULL)) {
1274 CDEBUG(D_ERROR, "%s: No target for connected export\n",
1275 class_exp2obd(lock->l_export)->obd_name);
1279 if (flag == LDLM_CB_CANCELING &&
1280 (lock->l_granted_mode & (LCK_EX | LCK_PW | LCK_GROUP)) &&
1281 (tgt->lut_sync_lock_cancel == ALWAYS_SYNC_ON_CANCEL ||
1282 (tgt->lut_sync_lock_cancel == BLOCKING_SYNC_ON_CANCEL &&
1283 ldlm_is_cbpending(lock))) &&
1284 ((exp_connect_flags(lock->l_export) & OBD_CONNECT_MDS_MDS) ||
1285 lock->l_resource->lr_type == LDLM_EXTENT)) {
1287 __u64 end = OBD_OBJECT_EOF;
1289 rc = lu_env_init(&env, LCT_DT_THREAD);
1290 if (unlikely(rc != 0))
1293 ost_fid_from_resid(&fid, &lock->l_resource->lr_name,
1294 tgt->lut_lsd.lsd_osd_index);
1296 if (lock->l_resource->lr_type == LDLM_EXTENT) {
1297 obj = dt_locate(&env, tgt->lut_bottom, &fid);
1299 GOTO(err_env, rc = PTR_ERR(obj));
1301 if (!dt_object_exists(obj))
1302 GOTO(err_put, rc = -ENOENT);
1304 start = lock->l_policy_data.l_extent.start;
1305 end = lock->l_policy_data.l_extent.end;
1308 rc = tgt_sync(&env, tgt, obj, start, end);
1310 CERROR("%s: syncing "DFID" (%llu-%llu) on lock "
1311 "cancel: rc = %d\n",
1312 tgt_name(tgt), PFID(&fid),
1313 lock->l_policy_data.l_extent.start,
1314 lock->l_policy_data.l_extent.end, rc);
1318 dt_object_put(&env, obj);
1323 rc = ldlm_server_blocking_ast(lock, desc, data, flag);
1327 static struct ldlm_callback_suite tgt_dlm_cbs = {
1328 .lcs_completion = ldlm_server_completion_ast,
1329 .lcs_blocking = tgt_blocking_ast,
1330 .lcs_glimpse = ldlm_server_glimpse_ast
1333 int tgt_enqueue(struct tgt_session_info *tsi)
1335 struct ptlrpc_request *req = tgt_ses_req(tsi);
1340 * tsi->tsi_dlm_req was already swapped and (if necessary) converted,
1341 * tsi->tsi_dlm_cbs was set by the *_req_handle() function.
1343 LASSERT(tsi->tsi_dlm_req != NULL);
1344 rc = ldlm_handle_enqueue0(tsi->tsi_exp->exp_obd->obd_namespace, req,
1345 tsi->tsi_dlm_req, &tgt_dlm_cbs);
1347 RETURN(err_serious(rc));
1349 switch (LUT_FAIL_CLASS(tsi->tsi_reply_fail_id)) {
1351 tsi->tsi_reply_fail_id = OBD_FAIL_MDS_LDLM_REPLY_NET;
1354 tsi->tsi_reply_fail_id = OBD_FAIL_OST_LDLM_REPLY_NET;
1357 tsi->tsi_reply_fail_id = OBD_FAIL_MGS_LDLM_REPLY_NET;
1360 tsi->tsi_reply_fail_id = OBD_FAIL_LDLM_REPLY;
1363 RETURN(req->rq_status);
1365 EXPORT_SYMBOL(tgt_enqueue);
1367 int tgt_convert(struct tgt_session_info *tsi)
1369 struct ptlrpc_request *req = tgt_ses_req(tsi);
1373 LASSERT(tsi->tsi_dlm_req);
1374 rc = ldlm_handle_convert0(req, tsi->tsi_dlm_req);
1376 RETURN(err_serious(rc));
1378 RETURN(req->rq_status);
1381 int tgt_bl_callback(struct tgt_session_info *tsi)
1383 return err_serious(-EOPNOTSUPP);
1386 int tgt_cp_callback(struct tgt_session_info *tsi)
1388 return err_serious(-EOPNOTSUPP);
1391 /* generic LDLM target handler */
1392 struct tgt_handler tgt_dlm_handlers[] = {
1393 TGT_DLM_HDL(HAS_KEY, LDLM_ENQUEUE, tgt_enqueue),
1394 TGT_DLM_HDL(HAS_KEY, LDLM_CONVERT, tgt_convert),
1395 TGT_DLM_HDL_VAR(0, LDLM_BL_CALLBACK, tgt_bl_callback),
1396 TGT_DLM_HDL_VAR(0, LDLM_CP_CALLBACK, tgt_cp_callback)
1398 EXPORT_SYMBOL(tgt_dlm_handlers);
1401 * Unified target LLOG handlers.
1403 int tgt_llog_open(struct tgt_session_info *tsi)
1409 rc = llog_origin_handle_open(tgt_ses_req(tsi));
1413 EXPORT_SYMBOL(tgt_llog_open);
1415 int tgt_llog_read_header(struct tgt_session_info *tsi)
1421 rc = llog_origin_handle_read_header(tgt_ses_req(tsi));
1425 EXPORT_SYMBOL(tgt_llog_read_header);
1427 int tgt_llog_next_block(struct tgt_session_info *tsi)
1433 rc = llog_origin_handle_next_block(tgt_ses_req(tsi));
1437 EXPORT_SYMBOL(tgt_llog_next_block);
1439 int tgt_llog_prev_block(struct tgt_session_info *tsi)
1445 rc = llog_origin_handle_prev_block(tgt_ses_req(tsi));
1449 EXPORT_SYMBOL(tgt_llog_prev_block);
1451 /* generic llog target handler */
1452 struct tgt_handler tgt_llog_handlers[] = {
1453 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_CREATE, tgt_llog_open),
1454 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_NEXT_BLOCK, tgt_llog_next_block),
1455 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_READ_HEADER, tgt_llog_read_header),
1456 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_PREV_BLOCK, tgt_llog_prev_block),
1458 EXPORT_SYMBOL(tgt_llog_handlers);
1461 * sec context handlers
1463 /* XXX: Implement based on mdt_sec_ctx_handle()? */
1464 static int tgt_sec_ctx_handle(struct tgt_session_info *tsi)
1469 struct tgt_handler tgt_sec_ctx_handlers[] = {
1470 TGT_SEC_HDL_VAR(0, SEC_CTX_INIT, tgt_sec_ctx_handle),
1471 TGT_SEC_HDL_VAR(0, SEC_CTX_INIT_CONT, tgt_sec_ctx_handle),
1472 TGT_SEC_HDL_VAR(0, SEC_CTX_FINI, tgt_sec_ctx_handle),
1474 EXPORT_SYMBOL(tgt_sec_ctx_handlers);
1476 int (*tgt_lfsck_in_notify_local)(const struct lu_env *env,
1477 struct dt_device *key,
1478 struct lfsck_req_local *lrl,
1479 struct thandle *th) = NULL;
1481 void tgt_register_lfsck_in_notify_local(int (*notify)(const struct lu_env *,
1483 struct lfsck_req_local *,
1486 tgt_lfsck_in_notify_local = notify;
1488 EXPORT_SYMBOL(tgt_register_lfsck_in_notify_local);
1490 int (*tgt_lfsck_in_notify)(const struct lu_env *env,
1491 struct dt_device *key,
1492 struct lfsck_request *lr) = NULL;
1494 void tgt_register_lfsck_in_notify(int (*notify)(const struct lu_env *,
1496 struct lfsck_request *))
1498 tgt_lfsck_in_notify = notify;
1500 EXPORT_SYMBOL(tgt_register_lfsck_in_notify);
1502 static int (*tgt_lfsck_query)(const struct lu_env *env,
1503 struct dt_device *key,
1504 struct lfsck_request *req,
1505 struct lfsck_reply *rep,
1506 struct lfsck_query *que) = NULL;
1508 void tgt_register_lfsck_query(int (*query)(const struct lu_env *,
1510 struct lfsck_request *,
1511 struct lfsck_reply *,
1512 struct lfsck_query *))
1514 tgt_lfsck_query = query;
1516 EXPORT_SYMBOL(tgt_register_lfsck_query);
1518 /* LFSCK request handlers */
1519 static int tgt_handle_lfsck_notify(struct tgt_session_info *tsi)
1521 const struct lu_env *env = tsi->tsi_env;
1522 struct dt_device *key = tsi->tsi_tgt->lut_bottom;
1523 struct lfsck_request *lr;
1527 lr = req_capsule_client_get(tsi->tsi_pill, &RMF_LFSCK_REQUEST);
1531 rc = tgt_lfsck_in_notify(env, key, lr);
1536 static int tgt_handle_lfsck_query(struct tgt_session_info *tsi)
1538 struct lfsck_request *request;
1539 struct lfsck_reply *reply;
1543 request = req_capsule_client_get(tsi->tsi_pill, &RMF_LFSCK_REQUEST);
1544 if (request == NULL)
1547 reply = req_capsule_server_get(tsi->tsi_pill, &RMF_LFSCK_REPLY);
1551 rc = tgt_lfsck_query(tsi->tsi_env, tsi->tsi_tgt->lut_bottom,
1552 request, reply, NULL);
1554 RETURN(rc < 0 ? rc : 0);
1557 struct tgt_handler tgt_lfsck_handlers[] = {
1558 TGT_LFSCK_HDL(HAS_REPLY, LFSCK_NOTIFY, tgt_handle_lfsck_notify),
1559 TGT_LFSCK_HDL(HAS_REPLY, LFSCK_QUERY, tgt_handle_lfsck_query),
1561 EXPORT_SYMBOL(tgt_lfsck_handlers);
1564 * initialize per-thread page pool (bug 5137).
1566 int tgt_io_thread_init(struct ptlrpc_thread *thread)
1568 struct tgt_thread_big_cache *tbc;
1572 LASSERT(thread != NULL);
1573 LASSERT(thread->t_data == NULL);
1575 OBD_ALLOC_LARGE(tbc, sizeof(*tbc));
1578 thread->t_data = tbc;
1581 EXPORT_SYMBOL(tgt_io_thread_init);
1584 * free per-thread pool created by tgt_thread_init().
1586 void tgt_io_thread_done(struct ptlrpc_thread *thread)
1588 struct tgt_thread_big_cache *tbc;
1592 LASSERT(thread != NULL);
1595 * be prepared to handle partially-initialized pools (because this is
1596 * called from ost_io_thread_init() for cleanup.
1598 tbc = thread->t_data;
1600 OBD_FREE_LARGE(tbc, sizeof(*tbc));
1601 thread->t_data = NULL;
1605 EXPORT_SYMBOL(tgt_io_thread_done);
1608 * Helper function for getting Data-on-MDT file server DLM lock
1609 * if asked by client.
1611 int tgt_mdt_data_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
1612 struct lustre_handle *lh, int mode, __u64 *flags)
1614 union ldlm_policy_data policy = {
1615 .l_inodebits.bits = MDS_INODELOCK_DOM,
1621 LASSERT(lh != NULL);
1622 LASSERT(ns != NULL);
1623 LASSERT(!lustre_handle_is_used(lh));
1625 rc = ldlm_cli_enqueue_local(NULL, ns, res_id, LDLM_IBITS, &policy, mode,
1626 flags, ldlm_blocking_ast,
1627 ldlm_completion_ast, ldlm_glimpse_ast,
1628 NULL, 0, LVB_T_NONE, NULL, lh);
1630 RETURN(rc == ELDLM_OK ? 0 : -EIO);
1632 EXPORT_SYMBOL(tgt_mdt_data_lock);
1634 void tgt_mdt_data_unlock(struct lustre_handle *lh, enum ldlm_mode mode)
1636 LASSERT(lustre_handle_is_used(lh));
1637 ldlm_lock_decref(lh, mode);
1639 EXPORT_SYMBOL(tgt_mdt_data_unlock);
1642 * Helper function for getting server side [start, start+count] DLM lock
1643 * if asked by client.
1645 int tgt_extent_lock(const struct lu_env *env, struct ldlm_namespace *ns,
1646 struct ldlm_res_id *res_id, __u64 start, __u64 end,
1647 struct lustre_handle *lh, int mode, __u64 *flags)
1649 union ldlm_policy_data policy;
1654 LASSERT(lh != NULL);
1655 LASSERT(ns != NULL);
1656 LASSERT(!lustre_handle_is_used(lh));
1658 policy.l_extent.gid = 0;
1659 policy.l_extent.start = start & PAGE_MASK;
1662 * If ->o_blocks is EOF it means "lock till the end of the file".
1663 * Otherwise, it's size of an extent or hole being punched (in bytes).
1665 if (end == OBD_OBJECT_EOF || end < start)
1666 policy.l_extent.end = OBD_OBJECT_EOF;
1668 policy.l_extent.end = end | ~PAGE_MASK;
1670 rc = ldlm_cli_enqueue_local(env, ns, res_id, LDLM_EXTENT, &policy,
1671 mode, flags, ldlm_blocking_ast,
1672 ldlm_completion_ast, ldlm_glimpse_ast,
1673 NULL, 0, LVB_T_NONE, NULL, lh);
1674 RETURN(rc == ELDLM_OK ? 0 : -EIO);
1676 EXPORT_SYMBOL(tgt_extent_lock);
1678 void tgt_extent_unlock(struct lustre_handle *lh, enum ldlm_mode mode)
1680 LASSERT(lustre_handle_is_used(lh));
1681 ldlm_lock_decref(lh, mode);
1683 EXPORT_SYMBOL(tgt_extent_unlock);
1685 static int tgt_brw_lock(const struct lu_env *env, struct obd_export *exp,
1686 struct ldlm_res_id *res_id, struct obd_ioobj *obj,
1687 struct niobuf_remote *nb, struct lustre_handle *lh,
1688 enum ldlm_mode mode)
1690 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
1692 int nrbufs = obj->ioo_bufcnt;
1698 LASSERT(mode == LCK_PR || mode == LCK_PW);
1699 LASSERT(!lustre_handle_is_used(lh));
1701 if (ns->ns_obd->obd_recovering)
1704 if (nrbufs == 0 || !(nb[0].rnb_flags & OBD_BRW_SRVLOCK))
1707 for (i = 1; i < nrbufs; i++)
1708 if (!(nb[i].rnb_flags & OBD_BRW_SRVLOCK))
1711 /* MDT IO for data-on-mdt */
1712 if (exp->exp_connect_data.ocd_connect_flags & OBD_CONNECT_IBITS)
1713 rc = tgt_mdt_data_lock(ns, res_id, lh, mode, &flags);
1715 rc = tgt_extent_lock(env, ns, res_id, nb[0].rnb_offset,
1716 nb[nrbufs - 1].rnb_offset +
1717 nb[nrbufs - 1].rnb_len - 1,
1722 static void tgt_brw_unlock(struct obd_ioobj *obj, struct niobuf_remote *niob,
1723 struct lustre_handle *lh, enum ldlm_mode mode)
1727 LASSERT(mode == LCK_PR || mode == LCK_PW);
1728 LASSERT((obj->ioo_bufcnt > 0 &&
1729 (niob[0].rnb_flags & OBD_BRW_SRVLOCK)) ==
1730 lustre_handle_is_used(lh));
1732 if (lustre_handle_is_used(lh))
1733 tgt_extent_unlock(lh, mode);
1736 static int tgt_checksum_niobuf(struct lu_target *tgt,
1737 struct niobuf_local *local_nb, int npages,
1738 int opc, enum cksum_types cksum_type,
1741 struct ahash_request *req;
1742 unsigned int bufsize;
1744 unsigned char cfs_alg = cksum_obd2cfs(cksum_type);
1746 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1748 CERROR("%s: unable to initialize checksum hash %s\n",
1749 tgt_name(tgt), cfs_crypto_hash_name(cfs_alg));
1750 return PTR_ERR(req);
1753 CDEBUG(D_INFO, "Checksum for algo %s\n", cfs_crypto_hash_name(cfs_alg));
1754 for (i = 0; i < npages; i++) {
1755 /* corrupt the data before we compute the checksum, to
1756 * simulate a client->OST data error */
1757 if (i == 0 && opc == OST_WRITE &&
1758 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) {
1759 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
1760 int len = local_nb[i].lnb_len;
1761 struct page *np = tgt_page_to_corrupt;
1764 char *ptr = ll_kmap_atomic(local_nb[i].lnb_page,
1766 char *ptr2 = page_address(np);
1768 memcpy(ptr2 + off, ptr + off, len);
1769 memcpy(ptr2 + off, "bad3", min(4, len));
1770 ll_kunmap_atomic(ptr, KM_USER0);
1772 /* LU-8376 to preserve original index for
1773 * display in dump_all_bulk_pages() */
1776 cfs_crypto_hash_update_page(req, np, off,
1780 CERROR("%s: can't alloc page for corruption\n",
1784 cfs_crypto_hash_update_page(req, local_nb[i].lnb_page,
1785 local_nb[i].lnb_page_offset & ~PAGE_MASK,
1786 local_nb[i].lnb_len);
1788 /* corrupt the data after we compute the checksum, to
1789 * simulate an OST->client data error */
1790 if (i == 0 && opc == OST_READ &&
1791 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND)) {
1792 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
1793 int len = local_nb[i].lnb_len;
1794 struct page *np = tgt_page_to_corrupt;
1797 char *ptr = ll_kmap_atomic(local_nb[i].lnb_page,
1799 char *ptr2 = page_address(np);
1801 memcpy(ptr2 + off, ptr + off, len);
1802 memcpy(ptr2 + off, "bad4", min(4, len));
1803 ll_kunmap_atomic(ptr, KM_USER0);
1805 /* LU-8376 to preserve original index for
1806 * display in dump_all_bulk_pages() */
1809 cfs_crypto_hash_update_page(req, np, off,
1813 CERROR("%s: can't alloc page for corruption\n",
1819 bufsize = sizeof(*cksum);
1820 err = cfs_crypto_hash_final(req, (unsigned char *)cksum, &bufsize);
1825 char dbgcksum_file_name[PATH_MAX];
1827 static void dump_all_bulk_pages(struct obdo *oa, int count,
1828 struct niobuf_local *local_nb,
1829 __u32 server_cksum, __u32 client_cksum)
1836 /* will only keep dump of pages on first error for the same range in
1837 * file/fid, not during the resends/retries. */
1838 snprintf(dbgcksum_file_name, sizeof(dbgcksum_file_name),
1839 "%s-checksum_dump-ost-"DFID":[%llu-%llu]-%x-%x",
1840 (strncmp(libcfs_debug_file_path_arr, "NONE", 4) != 0 ?
1841 libcfs_debug_file_path_arr :
1842 LIBCFS_DEBUG_FILE_PATH_DEFAULT),
1843 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1844 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1845 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1846 local_nb[0].lnb_file_offset,
1847 local_nb[count-1].lnb_file_offset +
1848 local_nb[count-1].lnb_len - 1, client_cksum, server_cksum);
1849 filp = filp_open(dbgcksum_file_name,
1850 O_CREAT | O_EXCL | O_WRONLY | O_LARGEFILE, 0600);
1854 CDEBUG(D_INFO, "%s: can't open to dump pages with "
1855 "checksum error: rc = %d\n", dbgcksum_file_name,
1858 CERROR("%s: can't open to dump pages with checksum "
1859 "error: rc = %d\n", dbgcksum_file_name, rc);
1863 for (i = 0; i < count; i++) {
1864 len = local_nb[i].lnb_len;
1865 buf = kmap(local_nb[i].lnb_page);
1867 rc = cfs_kernel_write(filp, buf, len, &filp->f_pos);
1869 CERROR("%s: wanted to write %u but got %d "
1870 "error\n", dbgcksum_file_name, len, rc);
1875 CDEBUG(D_INFO, "%s: wrote %d bytes\n",
1876 dbgcksum_file_name, rc);
1878 kunmap(local_nb[i].lnb_page);
1881 rc = ll_vfs_fsync_range(filp, 0, LLONG_MAX, 1);
1883 CERROR("%s: sync returns %d\n", dbgcksum_file_name, rc);
1884 filp_close(filp, NULL);
1888 static int check_read_checksum(struct niobuf_local *local_nb, int npages,
1889 struct obd_export *exp, struct obdo *oa,
1890 const struct lnet_process_id *peer,
1891 __u32 client_cksum, __u32 server_cksum,
1892 enum cksum_types server_cksum_type)
1895 enum cksum_types cksum_type;
1898 /* unlikely to happen and only if resend does not occur due to cksum
1899 * control failure on Client */
1900 if (unlikely(server_cksum == client_cksum)) {
1901 CDEBUG(D_PAGE, "checksum %x confirmed upon retry\n",
1906 if (exp->exp_obd->obd_checksum_dump)
1907 dump_all_bulk_pages(oa, npages, local_nb, server_cksum,
1910 cksum_type = obd_cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1913 if (cksum_type != server_cksum_type)
1914 msg = "the server may have not used the checksum type specified"
1915 " in the original request - likely a protocol problem";
1917 msg = "should have changed on the client or in transit";
1919 start = local_nb[0].lnb_file_offset;
1920 end = local_nb[npages-1].lnb_file_offset +
1921 local_nb[npages-1].lnb_len - 1;
1923 LCONSOLE_ERROR_MSG(0x132, "%s: BAD READ CHECKSUM: %s: from %s inode "
1924 DFID " object "DOSTID" extent [%llu-%llu], client returned csum"
1925 " %x (type %x), server csum %x (type %x)\n",
1926 exp->exp_obd->obd_name,
1927 msg, libcfs_nid2str(peer->nid),
1928 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : 0ULL,
1929 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1930 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1932 start, end, client_cksum, cksum_type, server_cksum,
1938 static int tgt_pages2shortio(struct niobuf_local *local, int npages,
1939 unsigned char *buf, int size)
1941 int i, off, len, copied = size;
1944 for (i = 0; i < npages; i++) {
1945 off = local[i].lnb_page_offset & ~PAGE_MASK;
1946 len = local[i].lnb_len;
1948 CDEBUG(D_PAGE, "index %d offset = %d len = %d left = %d\n",
1953 ptr = ll_kmap_atomic(local[i].lnb_page, KM_USER0);
1954 memcpy(buf + off, ptr, len);
1955 ll_kunmap_atomic(ptr, KM_USER0);
1959 return copied - size;
1962 static int tgt_checksum_niobuf_t10pi(struct lu_target *tgt,
1963 struct niobuf_local *local_nb,
1964 int npages, int opc,
1965 obd_dif_csum_fn *fn,
1969 enum cksum_types t10_cksum_type = tgt->lut_dt_conf.ddp_t10_cksum_type;
1970 unsigned char cfs_alg = cksum_obd2cfs(OBD_CKSUM_T10_TOP);
1971 const char *obd_name = tgt->lut_obd->obd_name;
1972 struct ahash_request *req;
1973 unsigned int bufsize;
1974 unsigned char *buffer;
1975 struct page *__page;
1978 int used_number = 0;
1984 __page = alloc_page(GFP_KERNEL);
1988 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1990 CERROR("%s: unable to initialize checksum hash %s\n",
1991 tgt_name(tgt), cfs_crypto_hash_name(cfs_alg));
1992 return PTR_ERR(req);
1995 buffer = kmap(__page);
1996 guard_start = (__u16 *)buffer;
1997 guard_number = PAGE_SIZE / sizeof(*guard_start);
1998 for (i = 0; i < npages; i++) {
1999 /* corrupt the data before we compute the checksum, to
2000 * simulate a client->OST data error */
2001 if (i == 0 && opc == OST_WRITE &&
2002 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) {
2003 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
2004 int len = local_nb[i].lnb_len;
2005 struct page *np = tgt_page_to_corrupt;
2008 char *ptr = ll_kmap_atomic(local_nb[i].lnb_page,
2010 char *ptr2 = page_address(np);
2012 memcpy(ptr2 + off, ptr + off, len);
2013 memcpy(ptr2 + off, "bad3", min(4, len));
2014 ll_kunmap_atomic(ptr, KM_USER0);
2016 /* LU-8376 to preserve original index for
2017 * display in dump_all_bulk_pages() */
2020 cfs_crypto_hash_update_page(req, np, off,
2024 CERROR("%s: can't alloc page for corruption\n",
2030 * The left guard number should be able to hold checksums of a
2033 if (t10_cksum_type && opc == OST_READ &&
2034 local_nb[i].lnb_guard_disk) {
2035 used = DIV_ROUND_UP(local_nb[i].lnb_len, sector_size);
2036 if (used > (guard_number - used_number)) {
2040 memcpy(guard_start + used_number,
2041 local_nb[i].lnb_guards,
2042 used * sizeof(*local_nb[i].lnb_guards));
2044 rc = obd_page_dif_generate_buffer(obd_name,
2045 local_nb[i].lnb_page,
2046 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2047 local_nb[i].lnb_len, guard_start + used_number,
2048 guard_number - used_number, &used, sector_size,
2054 LASSERT(used <= MAX_GUARD_NUMBER);
2056 * If disk support T10PI checksum, copy guards to local_nb.
2057 * If the write is partial page, do not use the guards for bio
2058 * submission since the data might not be full-sector. The bio
2059 * guards will be generated later based on the full sectors. If
2060 * the sector size is 512B rather than 4 KB, or the page size
2061 * is larger than 4KB, this might drop some useful guards for
2062 * partial page write, but it will only add minimal extra time
2063 * of checksum calculation.
2065 if (t10_cksum_type && opc == OST_WRITE &&
2066 local_nb[i].lnb_len == PAGE_SIZE) {
2067 local_nb[i].lnb_guard_rpc = 1;
2068 memcpy(local_nb[i].lnb_guards,
2069 guard_start + used_number,
2070 used * sizeof(*local_nb[i].lnb_guards));
2073 used_number += used;
2074 if (used_number == guard_number) {
2075 cfs_crypto_hash_update_page(req, __page, 0,
2076 used_number * sizeof(*guard_start));
2080 /* corrupt the data after we compute the checksum, to
2081 * simulate an OST->client data error */
2082 if (unlikely(i == 0 && opc == OST_READ &&
2083 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND))) {
2084 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
2085 int len = local_nb[i].lnb_len;
2086 struct page *np = tgt_page_to_corrupt;
2089 char *ptr = ll_kmap_atomic(local_nb[i].lnb_page,
2091 char *ptr2 = page_address(np);
2093 memcpy(ptr2 + off, ptr + off, len);
2094 memcpy(ptr2 + off, "bad4", min(4, len));
2095 ll_kunmap_atomic(ptr, KM_USER0);
2097 /* LU-8376 to preserve original index for
2098 * display in dump_all_bulk_pages() */
2101 cfs_crypto_hash_update_page(req, np, off,
2105 CERROR("%s: can't alloc page for corruption\n",
2114 if (used_number != 0)
2115 cfs_crypto_hash_update_page(req, __page, 0,
2116 used_number * sizeof(*guard_start));
2118 bufsize = sizeof(cksum);
2119 rc = cfs_crypto_hash_final(req, (unsigned char *)&cksum, &bufsize);
2124 __free_page(__page);
2128 static int tgt_checksum_niobuf_rw(struct lu_target *tgt,
2129 enum cksum_types cksum_type,
2130 struct niobuf_local *local_nb,
2131 int npages, int opc, u32 *check_sum)
2133 obd_dif_csum_fn *fn = NULL;
2134 int sector_size = 0;
2138 obd_t10_cksum2dif(cksum_type, &fn, §or_size);
2141 rc = tgt_checksum_niobuf_t10pi(tgt, local_nb, npages,
2142 opc, fn, sector_size,
2145 rc = tgt_checksum_niobuf(tgt, local_nb, npages, opc,
2146 cksum_type, check_sum);
2150 int tgt_brw_read(struct tgt_session_info *tsi)
2152 struct ptlrpc_request *req = tgt_ses_req(tsi);
2153 struct ptlrpc_bulk_desc *desc = NULL;
2154 struct obd_export *exp = tsi->tsi_exp;
2155 struct niobuf_remote *remote_nb;
2156 struct niobuf_local *local_nb;
2157 struct obd_ioobj *ioo;
2158 struct ost_body *body, *repbody;
2159 struct l_wait_info lwi;
2160 struct lustre_handle lockh = { 0 };
2161 int npages, nob = 0, rc, i, no_reply = 0,
2163 struct tgt_thread_big_cache *tbc = req->rq_svc_thread->t_data;
2164 const char *obd_name = exp->exp_obd->obd_name;
2168 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL &&
2169 ptlrpc_req2svc(req)->srv_req_portal != MDS_IO_PORTAL) {
2170 CERROR("%s: deny read request from %s to portal %u\n",
2171 tgt_name(tsi->tsi_tgt),
2172 obd_export_nid2str(req->rq_export),
2173 ptlrpc_req2svc(req)->srv_req_portal);
2177 req->rq_bulk_read = 1;
2179 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_READ_BULK))
2182 OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, cfs_fail_val > 0 ?
2183 cfs_fail_val : (obd_timeout + 1) / 4);
2185 /* Check if there is eviction in progress, and if so, wait for it to
2187 if (unlikely(atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
2188 /* We do not care how long it takes */
2189 lwi = LWI_INTR(NULL, NULL);
2190 rc = l_wait_event(exp->exp_obd->obd_evict_inprogress_waitq,
2191 !atomic_read(&exp->exp_obd->obd_evict_inprogress),
2195 /* There must be big cache in current thread to process this request
2196 * if it is NULL then something went wrong and it wasn't allocated,
2197 * report -ENOMEM in that case */
2201 body = tsi->tsi_ost_body;
2202 LASSERT(body != NULL);
2204 ioo = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_IOOBJ);
2205 LASSERT(ioo != NULL); /* must exists after tgt_ost_body_unpack */
2207 remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
2208 LASSERT(remote_nb != NULL); /* must exists after tgt_ost_body_unpack */
2210 local_nb = tbc->local;
2212 rc = tgt_brw_lock(tsi->tsi_env, exp, &tsi->tsi_resid, ioo, remote_nb,
2218 * If getting the lock took more time than
2219 * client was willing to wait, drop it. b=11330
2221 if (ktime_get_real_seconds() > req->rq_deadline ||
2222 OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
2224 CERROR("Dropping timed-out read from %s because locking object " DOSTID " took %lld seconds (limit was %lld).\n",
2225 libcfs_id2str(req->rq_peer), POSTID(&ioo->ioo_oid),
2226 ktime_get_real_seconds() - req->rq_arrival_time.tv_sec,
2227 req->rq_deadline - req->rq_arrival_time.tv_sec);
2228 GOTO(out_lock, rc = -ETIMEDOUT);
2231 repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
2232 repbody->oa = body->oa;
2234 npages = PTLRPC_MAX_BRW_PAGES;
2235 rc = obd_preprw(tsi->tsi_env, OBD_BRW_READ, exp, &repbody->oa, 1,
2236 ioo, remote_nb, &npages, local_nb);
2240 if (body->oa.o_flags & OBD_FL_SHORT_IO) {
2243 desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
2244 PTLRPC_BULK_PUT_SOURCE |
2245 PTLRPC_BULK_BUF_KIOV,
2247 &ptlrpc_bulk_kiov_nopin_ops);
2249 GOTO(out_commitrw, rc = -ENOMEM);
2253 npages_read = npages;
2254 for (i = 0; i < npages; i++) {
2255 int page_rc = local_nb[i].lnb_rc;
2264 if (page_rc != 0 && desc != NULL) { /* some data! */
2265 LASSERT(local_nb[i].lnb_page != NULL);
2266 desc->bd_frag_ops->add_kiov_frag
2267 (desc, local_nb[i].lnb_page,
2268 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2272 if (page_rc != local_nb[i].lnb_len) { /* short read */
2273 local_nb[i].lnb_len = page_rc;
2274 npages_read = i + (page_rc != 0 ? 1 : 0);
2275 /* All subsequent pages should be 0 */
2276 while (++i < npages)
2277 LASSERT(local_nb[i].lnb_rc == 0);
2281 if (OBD_FAIL_CHECK(OBD_FAIL_OST_READ_SIZE) &&
2282 nob != cfs_fail_val)
2285 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
2286 u32 flag = body->oa.o_valid & OBD_MD_FLFLAGS ?
2287 body->oa.o_flags : 0;
2288 enum cksum_types cksum_type = obd_cksum_type_unpack(flag);
2290 repbody->oa.o_flags = obd_cksum_type_pack(obd_name,
2292 repbody->oa.o_valid = OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
2294 rc = tgt_checksum_niobuf_rw(tsi->tsi_tgt, cksum_type,
2295 local_nb, npages_read, OST_READ,
2296 &repbody->oa.o_cksum);
2298 GOTO(out_commitrw, rc);
2299 CDEBUG(D_PAGE, "checksum at read origin: %x\n",
2300 repbody->oa.o_cksum);
2302 /* if a resend it could be for a cksum error, so check Server
2303 * cksum with returned Client cksum (this should even cover
2304 * zero-cksum case) */
2305 if ((body->oa.o_valid & OBD_MD_FLFLAGS) &&
2306 (body->oa.o_flags & OBD_FL_RECOV_RESEND))
2307 check_read_checksum(local_nb, npages_read, exp,
2308 &body->oa, &req->rq_peer,
2310 repbody->oa.o_cksum, cksum_type);
2312 repbody->oa.o_valid = 0;
2314 /* We're finishing using body->oa as an input variable */
2316 /* Check if client was evicted while we were doing i/o before touching
2319 if (body->oa.o_flags & OBD_FL_SHORT_IO) {
2320 unsigned char *short_io_buf;
2323 short_io_buf = req_capsule_server_get(&req->rq_pill,
2325 short_io_size = req_capsule_get_size(&req->rq_pill,
2328 rc = tgt_pages2shortio(local_nb, npages_read,
2329 short_io_buf, short_io_size);
2331 req_capsule_shrink(&req->rq_pill,
2334 rc = rc > 0 ? 0 : rc;
2335 } else if (!CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)) {
2336 rc = target_bulk_io(exp, desc, &lwi);
2340 if (body->oa.o_flags & OBD_FL_SHORT_IO)
2341 req_capsule_shrink(&req->rq_pill, &RMF_SHORT_IO, 0,
2346 /* Must commit after prep above in all cases */
2347 rc = obd_commitrw(tsi->tsi_env, OBD_BRW_READ, exp, &repbody->oa, 1, ioo,
2348 remote_nb, npages, local_nb, rc);
2350 tgt_brw_unlock(ioo, remote_nb, &lockh, LCK_PR);
2352 if (desc && !CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2))
2353 ptlrpc_free_bulk(desc);
2358 ptlrpc_lprocfs_brw(req, nob);
2359 } else if (no_reply) {
2360 req->rq_no_reply = 1;
2361 /* reply out callback would free */
2362 ptlrpc_req_drop_rs(req);
2363 LCONSOLE_WARN("%s: Bulk IO read error with %s (at %s), "
2364 "client will retry: rc %d\n",
2366 obd_uuid2str(&exp->exp_client_uuid),
2367 obd_export_nid2str(exp), rc);
2369 /* send a bulk after reply to simulate a network delay or reordering
2370 * by a router - Note that !desc implies short io, so there is no bulk
2372 if (unlikely(CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)) &&
2374 wait_queue_head_t waitq;
2375 struct l_wait_info lwi1;
2377 CDEBUG(D_INFO, "reorder BULK\n");
2378 init_waitqueue_head(&waitq);
2380 lwi1 = LWI_TIMEOUT_INTR(cfs_time_seconds(3), NULL, NULL, NULL);
2381 l_wait_event(waitq, 0, &lwi1);
2382 target_bulk_io(exp, desc, &lwi);
2383 ptlrpc_free_bulk(desc);
2388 EXPORT_SYMBOL(tgt_brw_read);
2390 static int tgt_shortio2pages(struct niobuf_local *local, int npages,
2391 unsigned char *buf, int size)
2396 for (i = 0; i < npages; i++) {
2397 off = local[i].lnb_page_offset & ~PAGE_MASK;
2398 len = local[i].lnb_len;
2403 CDEBUG(D_PAGE, "index %d offset = %d len = %d left = %d\n",
2405 ptr = ll_kmap_atomic(local[i].lnb_page, KM_USER0);
2408 memcpy(ptr + off, buf, len < size ? len : size);
2409 ll_kunmap_atomic(ptr, KM_USER0);
2416 static void tgt_warn_on_cksum(struct ptlrpc_request *req,
2417 struct ptlrpc_bulk_desc *desc,
2418 struct niobuf_local *local_nb, int npages,
2419 u32 client_cksum, u32 server_cksum,
2422 struct obd_export *exp = req->rq_export;
2423 struct ost_body *body;
2427 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2428 LASSERT(body != NULL);
2430 if (desc && req->rq_peer.nid != desc->bd_sender) {
2432 router = libcfs_nid2str(desc->bd_sender);
2435 if (exp->exp_obd->obd_checksum_dump)
2436 dump_all_bulk_pages(&body->oa, npages, local_nb, server_cksum,
2440 CDEBUG_LIMIT(D_INFO, "client csum %x, server csum %x\n",
2441 client_cksum, server_cksum);
2445 LCONSOLE_ERROR_MSG(0x168, "%s: BAD WRITE CHECKSUM: from %s%s%s inode "
2446 DFID" object "DOSTID" extent [%llu-%llu"
2447 "]: client csum %x, server csum %x\n",
2448 exp->exp_obd->obd_name, libcfs_id2str(req->rq_peer),
2450 body->oa.o_valid & OBD_MD_FLFID ?
2451 body->oa.o_parent_seq : (__u64)0,
2452 body->oa.o_valid & OBD_MD_FLFID ?
2453 body->oa.o_parent_oid : 0,
2454 body->oa.o_valid & OBD_MD_FLFID ?
2455 body->oa.o_parent_ver : 0,
2456 POSTID(&body->oa.o_oi),
2457 local_nb[0].lnb_file_offset,
2458 local_nb[npages-1].lnb_file_offset +
2459 local_nb[npages - 1].lnb_len - 1,
2460 client_cksum, server_cksum);
2463 int tgt_brw_write(struct tgt_session_info *tsi)
2465 struct ptlrpc_request *req = tgt_ses_req(tsi);
2466 struct ptlrpc_bulk_desc *desc = NULL;
2467 struct obd_export *exp = req->rq_export;
2468 struct niobuf_remote *remote_nb;
2469 struct niobuf_local *local_nb;
2470 struct obd_ioobj *ioo;
2471 struct ost_body *body, *repbody;
2472 struct l_wait_info lwi;
2473 struct lustre_handle lockh = {0};
2475 int objcount, niocount, npages;
2477 enum cksum_types cksum_type = OBD_CKSUM_CRC32;
2478 bool no_reply = false, mmap;
2479 struct tgt_thread_big_cache *tbc = req->rq_svc_thread->t_data;
2480 bool wait_sync = false;
2481 const char *obd_name = exp->exp_obd->obd_name;
2485 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL &&
2486 ptlrpc_req2svc(req)->srv_req_portal != MDS_IO_PORTAL) {
2487 CERROR("%s: deny write request from %s to portal %u\n",
2488 tgt_name(tsi->tsi_tgt),
2489 obd_export_nid2str(req->rq_export),
2490 ptlrpc_req2svc(req)->srv_req_portal);
2491 RETURN(err_serious(-EPROTO));
2494 if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOSPC))
2495 RETURN(err_serious(-ENOSPC));
2496 if (OBD_FAIL_TIMEOUT(OBD_FAIL_OST_EROFS, 1))
2497 RETURN(err_serious(-EROFS));
2499 req->rq_bulk_write = 1;
2501 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
2502 RETURN(err_serious(-EIO));
2503 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK2))
2504 RETURN(err_serious(-EFAULT));
2506 /* pause before transaction has been started */
2507 CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, cfs_fail_val > 0 ?
2508 cfs_fail_val : (obd_timeout + 1) / 4);
2510 /* There must be big cache in current thread to process this request
2511 * if it is NULL then something went wrong and it wasn't allocated,
2512 * report -ENOMEM in that case */
2516 body = tsi->tsi_ost_body;
2517 LASSERT(body != NULL);
2519 ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
2520 LASSERT(ioo != NULL); /* must exists after tgt_ost_body_unpack */
2522 objcount = req_capsule_get_size(&req->rq_pill, &RMF_OBD_IOOBJ,
2523 RCL_CLIENT) / sizeof(*ioo);
2525 for (niocount = i = 0; i < objcount; i++)
2526 niocount += ioo[i].ioo_bufcnt;
2528 remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
2529 LASSERT(remote_nb != NULL); /* must exists after tgt_ost_body_unpack */
2530 if (niocount != req_capsule_get_size(&req->rq_pill,
2531 &RMF_NIOBUF_REMOTE, RCL_CLIENT) /
2533 RETURN(err_serious(-EPROTO));
2535 if ((remote_nb[0].rnb_flags & OBD_BRW_MEMALLOC) &&
2536 ptlrpc_connection_is_local(exp->exp_connection))
2537 memory_pressure_set();
2539 req_capsule_set_size(&req->rq_pill, &RMF_RCS, RCL_SERVER,
2540 niocount * sizeof(*rcs));
2541 rc = req_capsule_server_pack(&req->rq_pill);
2543 GOTO(out, rc = err_serious(rc));
2545 CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_PACK, cfs_fail_val);
2546 rcs = req_capsule_server_get(&req->rq_pill, &RMF_RCS);
2548 local_nb = tbc->local;
2550 rc = tgt_brw_lock(tsi->tsi_env, exp, &tsi->tsi_resid, ioo, remote_nb,
2556 * If getting the lock took more time than
2557 * client was willing to wait, drop it. b=11330
2559 if (ktime_get_real_seconds() > req->rq_deadline ||
2560 OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
2562 CERROR("%s: Dropping timed-out write from %s because locking object " DOSTID " took %lld seconds (limit was %lld).\n",
2563 tgt_name(tsi->tsi_tgt), libcfs_id2str(req->rq_peer),
2564 POSTID(&ioo->ioo_oid),
2565 ktime_get_real_seconds() - req->rq_arrival_time.tv_sec,
2566 req->rq_deadline - req->rq_arrival_time.tv_sec);
2567 GOTO(out_lock, rc = -ETIMEDOUT);
2570 /* Because we already sync grant info with client when reconnect,
2571 * grant info will be cleared for resent req, then fed_grant and
2572 * total_grant will not be modified in following preprw_write */
2573 if (lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY)) {
2574 DEBUG_REQ(D_CACHE, req, "clear resent/replay req grant info");
2575 body->oa.o_valid &= ~OBD_MD_FLGRANT;
2578 repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
2579 if (repbody == NULL)
2580 GOTO(out_lock, rc = -ENOMEM);
2581 repbody->oa = body->oa;
2583 npages = PTLRPC_MAX_BRW_PAGES;
2584 rc = obd_preprw(tsi->tsi_env, OBD_BRW_WRITE, exp, &repbody->oa,
2585 objcount, ioo, remote_nb, &npages, local_nb);
2588 if (body->oa.o_flags & OBD_FL_SHORT_IO) {
2590 unsigned char *short_io_buf;
2592 short_io_size = req_capsule_get_size(&req->rq_pill,
2595 short_io_buf = req_capsule_client_get(&req->rq_pill,
2597 CDEBUG(D_INFO, "Client use short io for data transfer,"
2598 " size = %d\n", short_io_size);
2600 /* Copy short io buf to pages */
2601 rc = tgt_shortio2pages(local_nb, npages, short_io_buf,
2605 desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
2606 PTLRPC_BULK_GET_SINK |
2607 PTLRPC_BULK_BUF_KIOV,
2609 &ptlrpc_bulk_kiov_nopin_ops);
2611 GOTO(skip_transfer, rc = -ENOMEM);
2613 /* NB Having prepped, we must commit... */
2614 for (i = 0; i < npages; i++)
2615 desc->bd_frag_ops->add_kiov_frag(desc,
2616 local_nb[i].lnb_page,
2617 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2618 local_nb[i].lnb_len);
2620 rc = sptlrpc_svc_prep_bulk(req, desc);
2622 GOTO(skip_transfer, rc);
2624 rc = target_bulk_io(exp, desc, &lwi);
2630 if (body->oa.o_valid & OBD_MD_FLCKSUM && rc == 0) {
2631 static int cksum_counter;
2633 if (body->oa.o_valid & OBD_MD_FLFLAGS)
2634 cksum_type = obd_cksum_type_unpack(body->oa.o_flags);
2636 repbody->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
2637 repbody->oa.o_flags &= ~OBD_FL_CKSUM_ALL;
2638 repbody->oa.o_flags |= obd_cksum_type_pack(obd_name,
2641 rc = tgt_checksum_niobuf_rw(tsi->tsi_tgt, cksum_type,
2642 local_nb, npages, OST_WRITE,
2643 &repbody->oa.o_cksum);
2645 GOTO(out_commitrw, rc);
2649 if (unlikely(body->oa.o_cksum != repbody->oa.o_cksum)) {
2650 mmap = (body->oa.o_valid & OBD_MD_FLFLAGS &&
2651 body->oa.o_flags & OBD_FL_MMAP);
2653 tgt_warn_on_cksum(req, desc, local_nb, npages,
2655 repbody->oa.o_cksum, mmap);
2657 } else if ((cksum_counter & (-cksum_counter)) ==
2659 CDEBUG(D_INFO, "Checksum %u from %s OK: %x\n",
2660 cksum_counter, libcfs_id2str(req->rq_peer),
2661 repbody->oa.o_cksum);
2666 /* Must commit after prep above in all cases */
2667 rc = obd_commitrw(tsi->tsi_env, OBD_BRW_WRITE, exp, &repbody->oa,
2668 objcount, ioo, remote_nb, npages, local_nb, rc);
2669 if (rc == -ENOTCONN)
2670 /* quota acquire process has been given up because
2671 * either the client has been evicted or the client
2672 * has timed out the request already */
2675 for (i = 0; i < niocount; i++) {
2676 if (!(local_nb[i].lnb_flags & OBD_BRW_ASYNC)) {
2682 * Disable sending mtime back to the client. If the client locked the
2683 * whole object, then it has already updated the mtime on its side,
2684 * otherwise it will have to glimpse anyway (see bug 21489, comment 32)
2686 repbody->oa.o_valid &= ~(OBD_MD_FLMTIME | OBD_MD_FLATIME);
2691 /* set per-requested niobuf return codes */
2692 for (i = j = 0; i < niocount; i++) {
2693 int len = remote_nb[i].rnb_len;
2698 LASSERT(j < npages);
2699 if (local_nb[j].lnb_rc < 0)
2700 rcs[i] = local_nb[j].lnb_rc;
2701 len -= local_nb[j].lnb_len;
2706 LASSERT(j == npages);
2707 ptlrpc_lprocfs_brw(req, nob);
2710 tgt_brw_unlock(ioo, remote_nb, &lockh, LCK_PW);
2712 ptlrpc_free_bulk(desc);
2714 if (unlikely(no_reply || (exp->exp_obd->obd_no_transno && wait_sync))) {
2715 req->rq_no_reply = 1;
2716 /* reply out callback would free */
2717 ptlrpc_req_drop_rs(req);
2718 if (!exp->exp_obd->obd_no_transno)
2719 LCONSOLE_WARN("%s: Bulk IO write error with %s (at %s),"
2720 " client will retry: rc = %d\n",
2722 obd_uuid2str(&exp->exp_client_uuid),
2723 obd_export_nid2str(exp), rc);
2725 memory_pressure_clr();
2728 EXPORT_SYMBOL(tgt_brw_write);
2730 /* Check if request can be reconstructed from saved reply data
2731 * A copy of the reply data is returned in @trd if the pointer is not NULL
2733 bool req_can_reconstruct(struct ptlrpc_request *req,
2734 struct tg_reply_data *trd)
2736 struct tg_export_data *ted = &req->rq_export->exp_target_data;
2737 struct lsd_client_data *lcd = ted->ted_lcd;
2740 if (tgt_is_multimodrpcs_client(req->rq_export))
2741 return tgt_lookup_reply(req, trd);
2743 mutex_lock(&ted->ted_lcd_lock);
2744 found = req->rq_xid == lcd->lcd_last_xid ||
2745 req->rq_xid == lcd->lcd_last_close_xid;
2747 if (found && trd != NULL) {
2748 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE) {
2749 trd->trd_reply.lrd_xid = lcd->lcd_last_close_xid;
2750 trd->trd_reply.lrd_transno =
2751 lcd->lcd_last_close_transno;
2752 trd->trd_reply.lrd_result = lcd->lcd_last_close_result;
2754 trd->trd_reply.lrd_xid = lcd->lcd_last_xid;
2755 trd->trd_reply.lrd_transno = lcd->lcd_last_transno;
2756 trd->trd_reply.lrd_result = lcd->lcd_last_result;
2757 trd->trd_reply.lrd_data = lcd->lcd_last_data;
2758 trd->trd_pre_versions[0] = lcd->lcd_pre_versions[0];
2759 trd->trd_pre_versions[1] = lcd->lcd_pre_versions[1];
2760 trd->trd_pre_versions[2] = lcd->lcd_pre_versions[2];
2761 trd->trd_pre_versions[3] = lcd->lcd_pre_versions[3];
2764 mutex_unlock(&ted->ted_lcd_lock);
2768 EXPORT_SYMBOL(req_can_reconstruct);