4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 021110-1307, USA
24 * Copyright (c) 2013, 2017, Intel Corporation.
27 * lustre/target/tgt_handler.c
29 * Lustre Unified Target request handler code
31 * Author: Brian Behlendorf <behlendorf1@llnl.gov>
32 * Author: Mikhail Pershin <mike.pershin@intel.com>
35 #define DEBUG_SUBSYSTEM S_CLASS
37 #include <linux/user_namespace.h>
38 #include <linux/delay.h>
39 #include <linux/uidgid.h>
41 #include <libcfs/linux/linux-mem.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 body->oa.o_projid = nodemap_map_id(nodemap, NODEMAP_PROJID,
269 NODEMAP_CLIENT_TO_FS,
271 nodemap_putref(nodemap);
273 tsi->tsi_ost_body = body;
274 tsi->tsi_fid = body->oa.o_oi.oi_fid;
276 if (req_capsule_has_field(pill, &RMF_OBD_IOOBJ, RCL_CLIENT)) {
277 rc = tgt_io_data_unpack(tsi, &body->oa.o_oi);
282 if (!(body->oa.o_valid & OBD_MD_FLID)) {
283 if (flags & HAS_BODY) {
284 CERROR("%s: OBD_MD_FLID flag is not set in ost_body but OID/FID is mandatory with HAS_BODY\n",
285 tgt_name(tsi->tsi_tgt));
292 ost_fid_build_resid(&tsi->tsi_fid, &tsi->tsi_resid);
295 * OST doesn't get object in advance for further use to prevent
296 * situations with nested object_find which is potential deadlock.
298 tsi->tsi_corpus = NULL;
303 * Do necessary preprocessing according to handler ->th_flags.
305 static int tgt_request_preprocess(struct tgt_session_info *tsi,
306 struct tgt_handler *h,
307 struct ptlrpc_request *req)
309 struct req_capsule *pill = tsi->tsi_pill;
310 __u32 flags = h->th_flags;
315 if (tsi->tsi_preprocessed)
318 LASSERT(h->th_act != NULL);
319 LASSERT(h->th_opc == lustre_msg_get_opc(req->rq_reqmsg));
320 LASSERT(current->journal_info == NULL);
322 LASSERT(ergo(flags & (HAS_BODY | HAS_REPLY),
324 if (h->th_fmt != NULL) {
325 req_capsule_set(pill, h->th_fmt);
326 if (req_capsule_has_field(pill, &RMF_MDT_BODY, RCL_CLIENT) &&
327 req_capsule_field_present(pill, &RMF_MDT_BODY,
329 rc = tgt_mdt_body_unpack(tsi, flags);
332 } else if (req_capsule_has_field(pill, &RMF_OST_BODY,
334 req_capsule_field_present(pill, &RMF_OST_BODY,
336 rc = tgt_ost_body_unpack(tsi, flags);
342 if (flags & IS_MUTABLE && tgt_conn_flags(tsi) & OBD_CONNECT_RDONLY)
345 if (flags & HAS_KEY) {
346 struct ldlm_request *dlm_req;
348 LASSERT(h->th_fmt != NULL);
350 dlm_req = req_capsule_client_get(pill, &RMF_DLM_REQ);
351 if (dlm_req != NULL) {
352 union ldlm_wire_policy_data *policy =
353 &dlm_req->lock_desc.l_policy_data;
355 if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
357 (policy->l_inodebits.bits |
358 policy->l_inodebits.try_bits) == 0)) {
360 * Lock without inodebits makes no sense and
361 * will oops later in ldlm. If client miss to
362 * set such bits, do not trigger ASSERTION.
364 * For liblustre flock case, it maybe zero.
368 tsi->tsi_dlm_req = dlm_req;
374 tsi->tsi_preprocessed = 1;
379 * Invoke handler for this request opc. Also do necessary preprocessing
380 * (according to handler ->th_flags), and post-processing (setting of
381 * ->last_{xid,committed}).
383 static int tgt_handle_request0(struct tgt_session_info *tsi,
384 struct tgt_handler *h,
385 struct ptlrpc_request *req)
389 __u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
394 /* When dealing with sec context requests, no export is associated yet,
395 * because these requests are sent before *_CONNECT requests.
396 * A NULL req->rq_export means the normal *_common_slice handlers will
397 * not be called, because there is no reference to the target.
398 * So deal with them by hand and jump directly to target_send_reply().
402 case SEC_CTX_INIT_CONT:
404 CFS_FAIL_TIMEOUT(OBD_FAIL_SEC_CTX_HDL_PAUSE, cfs_fail_val);
409 * Checking for various OBD_FAIL_$PREF_$OPC_NET codes. _Do_ not try
410 * to put same checks into handlers like mdt_close(), mdt_reint(),
411 * etc., without talking to mdt authors first. Checking same thing
412 * there again is useless and returning 0 error without packing reply
413 * is buggy! Handlers either pack reply or return error.
415 * We return 0 here and do not send any reply in order to emulate
416 * network failure. Do not send any reply in case any of NET related
417 * fail_id has occured.
419 if (OBD_FAIL_CHECK_ORSET(h->th_fail_id, OBD_FAIL_ONCE))
421 if (unlikely(lustre_msg_get_opc(req->rq_reqmsg) == MDS_REINT &&
422 OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_MULTI_NET)))
425 /* drop OUT_UPDATE rpc */
426 if (unlikely(lustre_msg_get_opc(req->rq_reqmsg) == OUT_UPDATE &&
427 OBD_FAIL_CHECK(OBD_FAIL_OUT_UPDATE_DROP)))
430 rc = tgt_request_preprocess(tsi, h, req);
431 /* pack reply if reply format is fixed */
432 if (rc == 0 && h->th_flags & HAS_REPLY) {
434 if (req_capsule_has_field(tsi->tsi_pill, &RMF_MDT_MD,
436 req_capsule_set_size(tsi->tsi_pill, &RMF_MDT_MD,
438 tsi->tsi_mdt_body->mbo_eadatasize);
439 if (req_capsule_has_field(tsi->tsi_pill, &RMF_LOGCOOKIES,
441 req_capsule_set_size(tsi->tsi_pill, &RMF_LOGCOOKIES,
443 if (req_capsule_has_field(tsi->tsi_pill, &RMF_ACL, RCL_SERVER))
444 req_capsule_set_size(tsi->tsi_pill,
445 &RMF_ACL, RCL_SERVER,
446 LUSTRE_POSIX_ACL_MAX_SIZE_OLD);
448 if (req_capsule_has_field(tsi->tsi_pill, &RMF_SHORT_IO,
450 struct niobuf_remote *remote_nb =
451 req_capsule_client_get(tsi->tsi_pill,
453 struct ost_body *body = tsi->tsi_ost_body;
455 req_capsule_set_size(tsi->tsi_pill, &RMF_SHORT_IO,
457 (body->oa.o_valid & OBD_MD_FLFLAGS &&
458 body->oa.o_flags & OBD_FL_SHORT_IO) ?
459 remote_nb[0].rnb_len : 0);
461 if (req_capsule_has_field(tsi->tsi_pill, &RMF_FILE_ENCCTX,
463 req_capsule_set_size(tsi->tsi_pill, &RMF_FILE_ENCCTX,
466 rc = req_capsule_server_pack(tsi->tsi_pill);
469 if (likely(rc == 0)) {
471 * Process request, there can be two types of rc:
472 * 1) errors with msg unpack/pack, other failures outside the
473 * operation itself. This is counted as serious errors;
474 * 2) errors during fs operation, should be placed in rq_status
478 if (!is_serious(rc) &&
479 !req->rq_no_reply && req->rq_reply_state == NULL) {
480 DEBUG_REQ(D_ERROR, req,
481 "%s: %s handler did not pack reply but returned no error",
482 tgt_name(tsi->tsi_tgt), h->th_name);
485 serious = is_serious(rc);
486 rc = clear_serious(rc);
494 * ELDLM_* codes which > 0 should be in rq_status only as well as
495 * all non-serious errors.
497 if (rc > 0 || !serious)
500 LASSERT(current->journal_info == NULL);
502 if (likely(rc == 0 && req->rq_export))
503 target_committed_to_req(req);
506 target_send_reply(req, rc, tsi->tsi_reply_fail_id);
510 static int tgt_filter_recovery_request(struct ptlrpc_request *req,
511 struct obd_device *obd, int *process)
513 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
520 case MDS_SYNC: /* used in unmounting */
534 case MDS_HSM_PROGRESS:
535 case MDS_HSM_STATE_SET:
536 case MDS_HSM_REQUEST:
538 *process = target_queue_recovery_request(req, obd);
542 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
549 * Handle recovery. Return:
550 * +1: continue request processing;
551 * -ve: abort immediately with the given error code;
552 * 0: send reply with error code in req->rq_status;
554 static int tgt_handle_recovery(struct ptlrpc_request *req, int reply_fail_id)
558 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
563 case SEC_CTX_INIT_CONT:
568 if (!req->rq_export->exp_obd->obd_replayable)
571 /* sanity check: if the xid matches, the request must be marked as a
572 * resent or replayed */
573 if (req_can_reconstruct(req, NULL) == 1) {
574 if (!(lustre_msg_get_flags(req->rq_reqmsg) &
575 (MSG_RESENT | MSG_REPLAY))) {
576 DEBUG_REQ(D_WARNING, req,
577 "rq_xid=%llu matches saved XID, expected REPLAY or RESENT flag (%x)",
579 lustre_msg_get_flags(req->rq_reqmsg));
580 req->rq_status = -ENOTCONN;
584 /* else: note the opposite is not always true; a RESENT req after a
585 * failover will usually not match the last_xid, since it was likely
586 * never committed. A REPLAYed request will almost never match the
587 * last xid, however it could for a committed, but still retained,
590 /* Check for aborted recovery... */
591 if (unlikely(req->rq_export->exp_obd->obd_recovering)) {
595 DEBUG_REQ(D_INFO, req, "Got new replay");
596 rc = tgt_filter_recovery_request(req, req->rq_export->exp_obd,
598 if (rc != 0 || !should_process)
600 else if (should_process < 0) {
601 req->rq_status = should_process;
602 rc = ptlrpc_error(req);
609 /* Initial check for request, it is validation mostly */
610 static struct tgt_handler *tgt_handler_find_check(struct ptlrpc_request *req)
612 struct tgt_handler *h;
613 struct tgt_opc_slice *s;
614 struct lu_target *tgt;
615 __u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
619 tgt = class_exp2tgt(req->rq_export);
620 if (unlikely(tgt == NULL)) {
621 DEBUG_REQ(D_ERROR, req, "%s: no target for connected export",
622 class_exp2obd(req->rq_export)->obd_name);
623 RETURN(ERR_PTR(-EINVAL));
626 for (s = tgt->lut_slice; s->tos_hs != NULL; s++)
627 if (s->tos_opc_start <= opc && opc < s->tos_opc_end)
630 /* opcode was not found in slice */
631 if (unlikely(s->tos_hs == NULL)) {
634 /* don't spew error messages for unhandled RPCs */
636 CERROR("%s: no handler for opcode 0x%x from %s\n",
637 tgt_name(tgt), opc, libcfs_id2str(req->rq_peer));
640 RETURN(ERR_PTR(-ENOTSUPP));
643 LASSERT(opc >= s->tos_opc_start && opc < s->tos_opc_end);
644 h = s->tos_hs + (opc - s->tos_opc_start);
645 if (unlikely(h->th_opc == 0)) {
646 CERROR("%s: unsupported opcode 0x%x\n", tgt_name(tgt), opc);
647 RETURN(ERR_PTR(-ENOTSUPP));
653 static int process_req_last_xid(struct ptlrpc_request *req)
657 struct obd_export *exp = req->rq_export;
658 struct tg_export_data *ted = &exp->exp_target_data;
659 bool need_lock = tgt_is_multimodrpcs_client(exp);
663 mutex_lock(&ted->ted_lcd_lock);
664 /* check request's xid is consistent with export's last_xid */
665 last_xid = lustre_msg_get_last_xid(req->rq_reqmsg);
666 if (last_xid > exp->exp_last_xid)
667 exp->exp_last_xid = last_xid;
669 if (req->rq_xid == 0 || req->rq_xid <= exp->exp_last_xid) {
670 /* Some request is allowed to be sent during replay,
671 * such as OUT update requests, FLD requests, so it
672 * is possible that replay requests has smaller XID
673 * than the exp_last_xid.
675 * Some non-replay requests may have smaller XID as
678 * - Client send a no_resend RPC, like statfs;
679 * - The RPC timedout (or some other error) on client,
680 * then it's removed from the unreplied list;
681 * - Client send some other request to bump the
682 * exp_last_xid on server;
683 * - The former RPC got chance to be processed;
685 if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY))
688 DEBUG_REQ(D_WARNING, req,
689 "unexpected xid=%llx != exp_last_xid=%llx, rc = %d",
690 req->rq_xid, exp->exp_last_xid, rc);
695 /* The "last_xid" is the minimum xid among unreplied requests,
696 * if the request is from the previous connection, its xid can
697 * still be larger than "exp_last_xid", then the above check of
698 * xid is not enough to determine whether the request is delayed.
700 * For example, if some replay request was delayed and caused
701 * timeout at client and the replay is restarted, the delayed
702 * replay request will have the larger xid than "exp_last_xid"
704 if (req->rq_export->exp_conn_cnt >
705 lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
707 "Dropping request %llu from an old epoch %u/%u\n",
709 lustre_msg_get_conn_cnt(req->rq_reqmsg),
710 req->rq_export->exp_conn_cnt);
711 req->rq_no_reply = 1;
712 GOTO(out, rc = -ESTALE);
715 /* try to release in-memory reply data */
716 if (tgt_is_multimodrpcs_client(exp)) {
717 tgt_handle_received_xid(exp, last_xid);
718 rc = tgt_handle_tag(req);
723 mutex_unlock(&ted->ted_lcd_lock);
728 int tgt_request_handle(struct ptlrpc_request *req)
730 struct tgt_session_info *tsi = tgt_ses_info(req->rq_svc_thread->t_env);
732 struct lustre_msg *msg = req->rq_reqmsg;
733 struct tgt_handler *h;
734 struct lu_target *tgt;
735 int request_fail_id = 0;
736 __u32 opc = lustre_msg_get_opc(msg);
737 struct obd_device *obd;
739 bool is_connect = false;
742 if (unlikely(OBD_FAIL_CHECK(OBD_FAIL_TGT_RECOVERY_REQ_RACE))) {
743 if (cfs_fail_val == 0 &&
744 lustre_msg_get_opc(msg) != OBD_PING &&
745 lustre_msg_get_flags(msg) & MSG_REQ_REPLAY_DONE) {
748 wait_event_idle(cfs_race_waitq, (cfs_race_state == 1));
752 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
753 tsi->tsi_pill = &req->rq_pill;
754 tsi->tsi_env = req->rq_svc_thread->t_env;
756 /* if request has export then get handlers slice from corresponding
757 * target, otherwise that should be connect operation */
758 if (opc == MDS_CONNECT || opc == OST_CONNECT ||
759 opc == MGS_CONNECT) {
761 req_capsule_set(&req->rq_pill, &RQF_CONNECT);
762 rc = target_handle_connect(req);
764 rc = ptlrpc_error(req);
767 /* recovery-small test 18c asks to drop connect reply */
768 if (unlikely(opc == OST_CONNECT &&
769 OBD_FAIL_CHECK(OBD_FAIL_OST_CONNECT_NET2)))
773 if (unlikely(!class_connected_export(req->rq_export))) {
774 if (opc == SEC_CTX_INIT || opc == SEC_CTX_INIT_CONT ||
775 opc == SEC_CTX_FINI) {
776 /* sec context initialization has to be handled
777 * by hand in tgt_handle_request0() */
778 tsi->tsi_reply_fail_id = OBD_FAIL_SEC_CTX_INIT_NET;
780 GOTO(handle_recov, rc = 0);
782 CDEBUG(D_HA, "operation %d on unconnected OST from %s\n",
783 opc, libcfs_id2str(req->rq_peer));
784 req->rq_status = -ENOTCONN;
785 rc = ptlrpc_error(req);
789 tsi->tsi_tgt = tgt = class_exp2tgt(req->rq_export);
790 tsi->tsi_exp = req->rq_export;
791 if (exp_connect_flags(req->rq_export) & OBD_CONNECT_JOBSTATS)
792 tsi->tsi_jobid = lustre_msg_get_jobid(req->rq_reqmsg);
794 tsi->tsi_jobid = NULL;
797 DEBUG_REQ(D_ERROR, req, "%s: No target for connected export",
798 class_exp2obd(req->rq_export)->obd_name);
799 req->rq_status = -EINVAL;
800 rc = ptlrpc_error(req);
804 /* Skip last_xid processing for the recovery thread, otherwise, the
805 * last_xid on same request could be processed twice: first time when
806 * processing the incoming request, second time when the request is
807 * being processed by recovery thread. */
808 obd = class_exp2obd(req->rq_export);
810 /* reset the exp_last_xid on each connection. */
811 req->rq_export->exp_last_xid = 0;
812 } else if (obd->obd_recovery_data.trd_processing_task !=
814 rc = process_req_last_xid(req);
817 rc = ptlrpc_error(req);
822 request_fail_id = tgt->lut_request_fail_id;
823 tsi->tsi_reply_fail_id = tgt->lut_reply_fail_id;
825 h = tgt_handler_find_check(req);
827 req->rq_status = PTR_ERR(h);
828 rc = ptlrpc_error(req);
832 LASSERTF(h->th_opc == opc, "opcode mismatch %d != %d\n",
835 if ((cfs_fail_val == 0 || cfs_fail_val == opc) &&
836 CFS_FAIL_CHECK_ORSET(request_fail_id, CFS_FAIL_ONCE))
839 rc = lustre_msg_check_version(msg, h->th_version);
841 DEBUG_REQ(D_ERROR, req,
842 "%s: drop malformed request version=%08x expect=%08x",
843 tgt_name(tgt), lustre_msg_get_version(msg),
845 req->rq_status = -EINVAL;
846 rc = ptlrpc_error(req);
851 rc = tgt_handle_recovery(req, tsi->tsi_reply_fail_id);
852 if (likely(rc == 1)) {
853 rc = tgt_handle_request0(tsi, h, req);
859 req_capsule_fini(tsi->tsi_pill);
860 if (tsi->tsi_corpus != NULL) {
861 lu_object_put(tsi->tsi_env, tsi->tsi_corpus);
862 tsi->tsi_corpus = NULL;
866 EXPORT_SYMBOL(tgt_request_handle);
868 /** Assign high priority operations to the request if needed. */
869 int tgt_hpreq_handler(struct ptlrpc_request *req)
871 struct tgt_session_info *tsi = tgt_ses_info(req->rq_svc_thread->t_env);
872 struct tgt_handler *h;
877 if (req->rq_export == NULL)
880 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
881 tsi->tsi_pill = &req->rq_pill;
882 tsi->tsi_env = req->rq_svc_thread->t_env;
883 tsi->tsi_tgt = class_exp2tgt(req->rq_export);
884 tsi->tsi_exp = req->rq_export;
886 h = tgt_handler_find_check(req);
892 rc = tgt_request_preprocess(tsi, h, req);
893 if (unlikely(rc != 0))
896 if (h->th_hp != NULL)
900 EXPORT_SYMBOL(tgt_hpreq_handler);
902 void tgt_counter_incr(struct obd_export *exp, int opcode)
904 lprocfs_counter_incr(exp->exp_obd->obd_stats, opcode);
905 if (exp->exp_nid_stats && exp->exp_nid_stats->nid_stats != NULL)
906 lprocfs_counter_incr(exp->exp_nid_stats->nid_stats, opcode);
908 EXPORT_SYMBOL(tgt_counter_incr);
911 * Unified target generic handlers.
914 int tgt_connect_check_sptlrpc(struct ptlrpc_request *req, struct obd_export *exp)
916 struct lu_target *tgt = class_exp2tgt(exp);
917 struct sptlrpc_flavor flvr;
921 LASSERT(tgt->lut_obd);
922 LASSERT(tgt->lut_slice);
924 /* always allow ECHO client */
925 if (unlikely(strcmp(exp->exp_obd->obd_type->typ_name,
926 LUSTRE_ECHO_NAME) == 0)) {
927 exp->exp_flvr.sf_rpc = SPTLRPC_FLVR_ANY;
931 if (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
932 read_lock(&tgt->lut_sptlrpc_lock);
933 sptlrpc_target_choose_flavor(&tgt->lut_sptlrpc_rset,
937 read_unlock(&tgt->lut_sptlrpc_lock);
939 spin_lock(&exp->exp_lock);
940 exp->exp_sp_peer = req->rq_sp_from;
941 exp->exp_flvr = flvr;
943 /* when on mgs, if no restriction is set, or if the client
944 * NID is on the local node, allow any flavor
946 if ((strcmp(exp->exp_obd->obd_type->typ_name,
947 LUSTRE_MGS_NAME) == 0) &&
948 (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_NULL ||
949 LNetIsPeerLocal(&exp->exp_connection->c_peer.nid)))
950 exp->exp_flvr.sf_rpc = SPTLRPC_FLVR_ANY;
952 if (exp->exp_flvr.sf_rpc != SPTLRPC_FLVR_ANY &&
953 exp->exp_flvr.sf_rpc != req->rq_flvr.sf_rpc) {
954 CERROR("%s: unauthorized rpc flavor %x from %s, "
955 "expect %x\n", tgt_name(tgt),
957 libcfs_nid2str(req->rq_peer.nid),
958 exp->exp_flvr.sf_rpc);
961 spin_unlock(&exp->exp_lock);
963 if (exp->exp_sp_peer != req->rq_sp_from) {
964 CERROR("%s: RPC source %s doesn't match %s\n",
966 sptlrpc_part2name(req->rq_sp_from),
967 sptlrpc_part2name(exp->exp_sp_peer));
970 rc = sptlrpc_target_export_check(exp, req);
977 int tgt_adapt_sptlrpc_conf(struct lu_target *tgt)
979 struct sptlrpc_rule_set tmp_rset;
982 if (unlikely(tgt == NULL)) {
983 CERROR("No target passed\n");
987 sptlrpc_rule_set_init(&tmp_rset);
988 rc = sptlrpc_conf_target_get_rules(tgt->lut_obd, &tmp_rset);
990 CERROR("%s: failed get sptlrpc rules: rc = %d\n",
995 sptlrpc_target_update_exp_flavor(tgt->lut_obd, &tmp_rset);
997 write_lock(&tgt->lut_sptlrpc_lock);
998 sptlrpc_rule_set_free(&tgt->lut_sptlrpc_rset);
999 tgt->lut_sptlrpc_rset = tmp_rset;
1000 write_unlock(&tgt->lut_sptlrpc_lock);
1004 EXPORT_SYMBOL(tgt_adapt_sptlrpc_conf);
1006 int tgt_connect(struct tgt_session_info *tsi)
1008 struct ptlrpc_request *req = tgt_ses_req(tsi);
1009 struct obd_connect_data *reply;
1014 /* XXX: better to call this check right after getting new export but
1015 * before last_rcvd slot allocation to avoid server load upon insecure
1016 * connects. This is to be fixed after unifiyng all targets.
1018 rc = tgt_connect_check_sptlrpc(req, tsi->tsi_exp);
1022 /* To avoid exposing partially initialized connection flags, changes up
1023 * to this point have been staged in reply->ocd_connect_flags. Now that
1024 * connection handling has completed successfully, atomically update
1025 * the connect flags in the shared export data structure. LU-1623 */
1026 reply = req_capsule_server_get(tsi->tsi_pill, &RMF_CONNECT_DATA);
1027 spin_lock(&tsi->tsi_exp->exp_lock);
1028 *exp_connect_flags_ptr(tsi->tsi_exp) = reply->ocd_connect_flags;
1029 if (reply->ocd_connect_flags & OBD_CONNECT_FLAGS2)
1030 *exp_connect_flags2_ptr(tsi->tsi_exp) =
1031 reply->ocd_connect_flags2;
1032 tsi->tsi_exp->exp_connect_data.ocd_brw_size = reply->ocd_brw_size;
1033 spin_unlock(&tsi->tsi_exp->exp_lock);
1035 if (strcmp(tsi->tsi_exp->exp_obd->obd_type->typ_name,
1036 LUSTRE_MDT_NAME) == 0) {
1037 rc = req_check_sepol(tsi->tsi_pill);
1041 if (reply->ocd_connect_flags & OBD_CONNECT_FLAGS2 &&
1042 reply->ocd_connect_flags2 & OBD_CONNECT2_ENCRYPT &&
1043 tsi->tsi_pill->rc_req->rq_export) {
1044 bool forbid_encrypt = true;
1045 struct lu_nodemap *nm =
1046 nodemap_get_from_exp(tsi->tsi_pill->rc_req->rq_export);
1049 /* nodemap_get_from_exp returns NULL in case
1050 * nodemap is not active, so we do not forbid
1052 forbid_encrypt = false;
1053 } else if (!IS_ERR(nm)) {
1054 forbid_encrypt = nm->nmf_forbid_encryption;
1059 GOTO(out, rc = -EACCES);
1065 obd_disconnect(class_export_get(tsi->tsi_exp));
1068 EXPORT_SYMBOL(tgt_connect);
1070 int tgt_disconnect(struct tgt_session_info *tsi)
1076 OBD_FAIL_TIMEOUT(OBD_FAIL_OST_DISCONNECT_DELAY, cfs_fail_val);
1078 rc = target_handle_disconnect(tgt_ses_req(tsi));
1080 RETURN(err_serious(rc));
1084 EXPORT_SYMBOL(tgt_disconnect);
1087 * Unified target OBD handlers
1089 int tgt_obd_ping(struct tgt_session_info *tsi)
1095 /* The target-specific part of OBD_PING request handling.
1096 * It controls Filter Modification Data (FMD) expiration each time
1099 * Valid only for replayable targets, e.g. MDT and OFD
1101 if (tsi->tsi_exp->exp_obd->obd_replayable)
1102 tgt_fmd_expire(tsi->tsi_exp);
1104 rc = req_capsule_server_pack(tsi->tsi_pill);
1106 RETURN(err_serious(rc));
1110 EXPORT_SYMBOL(tgt_obd_ping);
1112 int tgt_obd_log_cancel(struct tgt_session_info *tsi)
1114 return err_serious(-EOPNOTSUPP);
1117 int tgt_send_buffer(struct tgt_session_info *tsi, struct lu_rdbuf *rdbuf)
1119 struct ptlrpc_request *req = tgt_ses_req(tsi);
1120 struct obd_export *exp = req->rq_export;
1121 struct ptlrpc_bulk_desc *desc;
1128 for (i = 0; i < rdbuf->rb_nbufs; i++) {
1129 unsigned int offset;
1131 offset = (unsigned long)rdbuf->rb_bufs[i].lb_buf & ~PAGE_MASK;
1132 pages += DIV_ROUND_UP(rdbuf->rb_bufs[i].lb_len + offset,
1136 desc = ptlrpc_prep_bulk_exp(req, pages, 1,
1137 PTLRPC_BULK_PUT_SOURCE,
1139 &ptlrpc_bulk_kiov_nopin_ops);
1143 for (i = 0; i < rdbuf->rb_nbufs; i++)
1144 desc->bd_frag_ops->add_iov_frag(desc,
1145 rdbuf->rb_bufs[i].lb_buf,
1146 rdbuf->rb_bufs[i].lb_len);
1148 rc = target_bulk_io(exp, desc);
1149 ptlrpc_free_bulk(desc);
1152 EXPORT_SYMBOL(tgt_send_buffer);
1154 int tgt_sendpage(struct tgt_session_info *tsi, struct lu_rdpg *rdpg, int nob)
1156 struct ptlrpc_request *req = tgt_ses_req(tsi);
1157 struct obd_export *exp = req->rq_export;
1158 struct ptlrpc_bulk_desc *desc;
1166 desc = ptlrpc_prep_bulk_exp(req, rdpg->rp_npages, 1,
1167 PTLRPC_BULK_PUT_SOURCE,
1169 &ptlrpc_bulk_kiov_pin_ops);
1173 if (!(exp_connect_flags(exp) & OBD_CONNECT_BRW_SIZE))
1174 /* old client requires reply size in it's PAGE_SIZE,
1175 * which is rdpg->rp_count */
1176 nob = rdpg->rp_count;
1178 for (i = 0, tmpcount = nob; i < rdpg->rp_npages && tmpcount > 0;
1179 i++, tmpcount -= tmpsize) {
1180 tmpsize = min_t(int, tmpcount, PAGE_SIZE);
1181 desc->bd_frag_ops->add_kiov_frag(desc, rdpg->rp_pages[i], 0,
1185 LASSERT(desc->bd_nob == nob);
1186 rc = target_bulk_io(exp, desc);
1187 ptlrpc_free_bulk(desc);
1190 EXPORT_SYMBOL(tgt_sendpage);
1193 * OBD_IDX_READ handler
1195 static int tgt_obd_idx_read(struct tgt_session_info *tsi)
1197 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
1198 struct lu_rdpg *rdpg = &tti->tti_u.rdpg.tti_rdpg;
1199 struct idx_info *req_ii, *rep_ii;
1204 memset(rdpg, 0, sizeof(*rdpg));
1205 req_capsule_set(tsi->tsi_pill, &RQF_OBD_IDX_READ);
1207 /* extract idx_info buffer from request & reply */
1208 req_ii = req_capsule_client_get(tsi->tsi_pill, &RMF_IDX_INFO);
1209 if (req_ii == NULL || req_ii->ii_magic != IDX_INFO_MAGIC)
1210 RETURN(err_serious(-EPROTO));
1212 rc = req_capsule_server_pack(tsi->tsi_pill);
1214 RETURN(err_serious(rc));
1216 rep_ii = req_capsule_server_get(tsi->tsi_pill, &RMF_IDX_INFO);
1218 RETURN(err_serious(-EFAULT));
1219 rep_ii->ii_magic = IDX_INFO_MAGIC;
1221 /* extract hash to start with */
1222 rdpg->rp_hash = req_ii->ii_hash_start;
1224 /* extract requested attributes */
1225 rdpg->rp_attrs = req_ii->ii_attrs;
1227 /* check that fid packed in request is valid and supported */
1228 if (!fid_is_sane(&req_ii->ii_fid))
1230 rep_ii->ii_fid = req_ii->ii_fid;
1233 rep_ii->ii_flags = req_ii->ii_flags;
1235 /* compute number of pages to allocate, ii_count is the number of 4KB
1237 if (req_ii->ii_count <= 0)
1238 GOTO(out, rc = -EFAULT);
1239 rdpg->rp_count = min_t(unsigned int, req_ii->ii_count << LU_PAGE_SHIFT,
1240 exp_max_brw_size(tsi->tsi_exp));
1241 rdpg->rp_npages = (rdpg->rp_count + PAGE_SIZE - 1) >> PAGE_SHIFT;
1243 /* allocate pages to store the containers */
1244 OBD_ALLOC_PTR_ARRAY(rdpg->rp_pages, rdpg->rp_npages);
1245 if (rdpg->rp_pages == NULL)
1246 GOTO(out, rc = -ENOMEM);
1247 for (i = 0; i < rdpg->rp_npages; i++) {
1248 rdpg->rp_pages[i] = alloc_page(GFP_NOFS);
1249 if (rdpg->rp_pages[i] == NULL)
1250 GOTO(out, rc = -ENOMEM);
1253 /* populate pages with key/record pairs */
1254 rc = dt_index_read(tsi->tsi_env, tsi->tsi_tgt->lut_bottom, rep_ii, rdpg);
1258 LASSERTF(rc <= rdpg->rp_count, "dt_index_read() returned more than "
1259 "asked %d > %d\n", rc, rdpg->rp_count);
1261 /* send pages to client */
1262 rc = tgt_sendpage(tsi, rdpg, rc);
1267 if (rdpg->rp_pages) {
1268 for (i = 0; i < rdpg->rp_npages; i++)
1269 if (rdpg->rp_pages[i])
1270 __free_page(rdpg->rp_pages[i]);
1271 OBD_FREE_PTR_ARRAY(rdpg->rp_pages, rdpg->rp_npages);
1276 struct tgt_handler tgt_obd_handlers[] = {
1277 TGT_OBD_HDL (0, OBD_PING, tgt_obd_ping),
1278 TGT_OBD_HDL (0, OBD_IDX_READ, tgt_obd_idx_read)
1280 EXPORT_SYMBOL(tgt_obd_handlers);
1282 int tgt_sync(const struct lu_env *env, struct lu_target *tgt,
1283 struct dt_object *obj, __u64 start, __u64 end)
1289 /* if no objid is specified, it means "sync whole filesystem" */
1291 rc = dt_sync(env, tgt->lut_bottom);
1292 } else if (dt_version_get(env, obj) >
1293 tgt->lut_obd->obd_last_committed) {
1294 rc = dt_object_sync(env, obj, start, end);
1296 atomic_inc(&tgt->lut_sync_count);
1300 EXPORT_SYMBOL(tgt_sync);
1302 * Unified target DLM handlers.
1306 * Unified target BAST
1308 * Ensure data and metadata are synced to disk when lock is canceled if Sync on
1309 * Cancel (SOC) is enabled. If it's extent lock, normally sync obj is enough,
1310 * but if it's cross-MDT lock, because remote object version is not set, a
1311 * filesystem sync is needed.
1313 * \param lock server side lock
1314 * \param desc lock desc
1315 * \param data ldlm_cb_set_arg
1316 * \param flag indicates whether this cancelling or blocking callback
1317 * \retval 0 on success
1318 * \retval negative number on error
1320 static int tgt_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
1321 void *data, int flag)
1324 struct lu_target *tgt;
1325 struct dt_object *obj = NULL;
1331 tgt = class_exp2tgt(lock->l_export);
1333 if (unlikely(tgt == NULL)) {
1334 CDEBUG(D_ERROR, "%s: No target for connected export\n",
1335 class_exp2obd(lock->l_export)->obd_name);
1339 if (flag == LDLM_CB_CANCELING &&
1340 (lock->l_granted_mode & (LCK_EX | LCK_PW | LCK_GROUP)) &&
1341 (tgt->lut_sync_lock_cancel == SYNC_LOCK_CANCEL_ALWAYS ||
1342 (tgt->lut_sync_lock_cancel == SYNC_LOCK_CANCEL_BLOCKING &&
1343 ldlm_is_cbpending(lock))) &&
1344 ((exp_connect_flags(lock->l_export) & OBD_CONNECT_MDS_MDS) ||
1345 lock->l_resource->lr_type == LDLM_EXTENT)) {
1347 __u64 end = OBD_OBJECT_EOF;
1349 rc = lu_env_init(&env, LCT_DT_THREAD);
1350 if (unlikely(rc != 0))
1353 ost_fid_from_resid(&fid, &lock->l_resource->lr_name,
1354 tgt->lut_lsd.lsd_osd_index);
1356 if (lock->l_resource->lr_type == LDLM_EXTENT) {
1357 obj = dt_locate(&env, tgt->lut_bottom, &fid);
1359 GOTO(err_env, rc = PTR_ERR(obj));
1361 if (!dt_object_exists(obj))
1362 GOTO(err_put, rc = -ENOENT);
1364 start = lock->l_policy_data.l_extent.start;
1365 end = lock->l_policy_data.l_extent.end;
1368 rc = tgt_sync(&env, tgt, obj, start, end);
1370 CERROR("%s: syncing "DFID" (%llu-%llu) on lock "
1371 "cancel: rc = %d\n",
1372 tgt_name(tgt), PFID(&fid),
1373 lock->l_policy_data.l_extent.start,
1374 lock->l_policy_data.l_extent.end, rc);
1378 dt_object_put(&env, obj);
1383 rc = ldlm_server_blocking_ast(lock, desc, data, flag);
1387 static struct ldlm_callback_suite tgt_dlm_cbs = {
1388 .lcs_completion = ldlm_server_completion_ast,
1389 .lcs_blocking = tgt_blocking_ast,
1390 .lcs_glimpse = ldlm_server_glimpse_ast
1393 int tgt_enqueue(struct tgt_session_info *tsi)
1395 struct ptlrpc_request *req = tgt_ses_req(tsi);
1400 * tsi->tsi_dlm_req was already swapped and (if necessary) converted,
1401 * tsi->tsi_dlm_cbs was set by the *_req_handle() function.
1403 LASSERT(tsi->tsi_dlm_req != NULL);
1404 rc = ldlm_handle_enqueue0(tsi->tsi_exp->exp_obd->obd_namespace, req,
1405 tsi->tsi_dlm_req, &tgt_dlm_cbs);
1407 RETURN(err_serious(rc));
1409 switch (LUT_FAIL_CLASS(tsi->tsi_reply_fail_id)) {
1411 tsi->tsi_reply_fail_id = OBD_FAIL_MDS_LDLM_REPLY_NET;
1414 tsi->tsi_reply_fail_id = OBD_FAIL_OST_LDLM_REPLY_NET;
1417 tsi->tsi_reply_fail_id = OBD_FAIL_MGS_LDLM_REPLY_NET;
1420 tsi->tsi_reply_fail_id = OBD_FAIL_LDLM_REPLY;
1423 RETURN(req->rq_status);
1425 EXPORT_SYMBOL(tgt_enqueue);
1427 int tgt_convert(struct tgt_session_info *tsi)
1429 struct ptlrpc_request *req = tgt_ses_req(tsi);
1433 LASSERT(tsi->tsi_dlm_req);
1434 rc = ldlm_handle_convert0(req, tsi->tsi_dlm_req);
1436 RETURN(err_serious(rc));
1438 RETURN(req->rq_status);
1441 int tgt_bl_callback(struct tgt_session_info *tsi)
1443 return err_serious(-EOPNOTSUPP);
1446 int tgt_cp_callback(struct tgt_session_info *tsi)
1448 return err_serious(-EOPNOTSUPP);
1451 /* generic LDLM target handler */
1452 struct tgt_handler tgt_dlm_handlers[] = {
1453 TGT_DLM_HDL(HAS_KEY, LDLM_ENQUEUE, tgt_enqueue),
1454 TGT_DLM_HDL(HAS_KEY, LDLM_CONVERT, tgt_convert),
1455 TGT_DLM_HDL_VAR(0, LDLM_BL_CALLBACK, tgt_bl_callback),
1456 TGT_DLM_HDL_VAR(0, LDLM_CP_CALLBACK, tgt_cp_callback)
1458 EXPORT_SYMBOL(tgt_dlm_handlers);
1461 * Unified target LLOG handlers.
1463 int tgt_llog_open(struct tgt_session_info *tsi)
1469 rc = llog_origin_handle_open(tgt_ses_req(tsi));
1473 EXPORT_SYMBOL(tgt_llog_open);
1475 int tgt_llog_read_header(struct tgt_session_info *tsi)
1481 rc = llog_origin_handle_read_header(tgt_ses_req(tsi));
1485 EXPORT_SYMBOL(tgt_llog_read_header);
1487 int tgt_llog_next_block(struct tgt_session_info *tsi)
1493 rc = llog_origin_handle_next_block(tgt_ses_req(tsi));
1497 EXPORT_SYMBOL(tgt_llog_next_block);
1499 int tgt_llog_prev_block(struct tgt_session_info *tsi)
1505 rc = llog_origin_handle_prev_block(tgt_ses_req(tsi));
1509 EXPORT_SYMBOL(tgt_llog_prev_block);
1511 /* generic llog target handler */
1512 struct tgt_handler tgt_llog_handlers[] = {
1513 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_CREATE, tgt_llog_open),
1514 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_NEXT_BLOCK, tgt_llog_next_block),
1515 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_READ_HEADER, tgt_llog_read_header),
1516 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_PREV_BLOCK, tgt_llog_prev_block),
1518 EXPORT_SYMBOL(tgt_llog_handlers);
1521 * sec context handlers
1523 /* XXX: Implement based on mdt_sec_ctx_handle()? */
1524 static int tgt_sec_ctx_handle(struct tgt_session_info *tsi)
1529 struct tgt_handler tgt_sec_ctx_handlers[] = {
1530 TGT_SEC_HDL_VAR(0, SEC_CTX_INIT, tgt_sec_ctx_handle),
1531 TGT_SEC_HDL_VAR(0, SEC_CTX_INIT_CONT, tgt_sec_ctx_handle),
1532 TGT_SEC_HDL_VAR(0, SEC_CTX_FINI, tgt_sec_ctx_handle),
1534 EXPORT_SYMBOL(tgt_sec_ctx_handlers);
1536 int (*tgt_lfsck_in_notify_local)(const struct lu_env *env,
1537 struct dt_device *key,
1538 struct lfsck_req_local *lrl,
1539 struct thandle *th) = NULL;
1541 void tgt_register_lfsck_in_notify_local(int (*notify)(const struct lu_env *,
1543 struct lfsck_req_local *,
1546 tgt_lfsck_in_notify_local = notify;
1548 EXPORT_SYMBOL(tgt_register_lfsck_in_notify_local);
1550 int (*tgt_lfsck_in_notify)(const struct lu_env *env,
1551 struct dt_device *key,
1552 struct lfsck_request *lr) = NULL;
1554 void tgt_register_lfsck_in_notify(int (*notify)(const struct lu_env *,
1556 struct lfsck_request *))
1558 tgt_lfsck_in_notify = notify;
1560 EXPORT_SYMBOL(tgt_register_lfsck_in_notify);
1562 static int (*tgt_lfsck_query)(const struct lu_env *env,
1563 struct dt_device *key,
1564 struct lfsck_request *req,
1565 struct lfsck_reply *rep,
1566 struct lfsck_query *que) = NULL;
1568 void tgt_register_lfsck_query(int (*query)(const struct lu_env *,
1570 struct lfsck_request *,
1571 struct lfsck_reply *,
1572 struct lfsck_query *))
1574 tgt_lfsck_query = query;
1576 EXPORT_SYMBOL(tgt_register_lfsck_query);
1578 /* LFSCK request handlers */
1579 static int tgt_handle_lfsck_notify(struct tgt_session_info *tsi)
1581 const struct lu_env *env = tsi->tsi_env;
1582 struct dt_device *key = tsi->tsi_tgt->lut_bottom;
1583 struct lfsck_request *lr;
1587 lr = req_capsule_client_get(tsi->tsi_pill, &RMF_LFSCK_REQUEST);
1591 rc = tgt_lfsck_in_notify(env, key, lr);
1596 static int tgt_handle_lfsck_query(struct tgt_session_info *tsi)
1598 struct lfsck_request *request;
1599 struct lfsck_reply *reply;
1603 request = req_capsule_client_get(tsi->tsi_pill, &RMF_LFSCK_REQUEST);
1604 if (request == NULL)
1607 reply = req_capsule_server_get(tsi->tsi_pill, &RMF_LFSCK_REPLY);
1611 rc = tgt_lfsck_query(tsi->tsi_env, tsi->tsi_tgt->lut_bottom,
1612 request, reply, NULL);
1614 RETURN(rc < 0 ? rc : 0);
1617 struct tgt_handler tgt_lfsck_handlers[] = {
1618 TGT_LFSCK_HDL(HAS_REPLY, LFSCK_NOTIFY, tgt_handle_lfsck_notify),
1619 TGT_LFSCK_HDL(HAS_REPLY, LFSCK_QUERY, tgt_handle_lfsck_query),
1621 EXPORT_SYMBOL(tgt_lfsck_handlers);
1624 * initialize per-thread page pool (bug 5137).
1626 int tgt_io_thread_init(struct ptlrpc_thread *thread)
1628 struct tgt_thread_big_cache *tbc;
1632 LASSERT(thread != NULL);
1633 LASSERT(thread->t_data == NULL);
1635 OBD_ALLOC_LARGE(tbc, sizeof(*tbc));
1638 thread->t_data = tbc;
1641 EXPORT_SYMBOL(tgt_io_thread_init);
1644 * free per-thread pool created by tgt_thread_init().
1646 void tgt_io_thread_done(struct ptlrpc_thread *thread)
1648 struct tgt_thread_big_cache *tbc;
1652 LASSERT(thread != NULL);
1655 * be prepared to handle partially-initialized pools (because this is
1656 * called from ost_io_thread_init() for cleanup.
1658 tbc = thread->t_data;
1660 OBD_FREE_LARGE(tbc, sizeof(*tbc));
1661 thread->t_data = NULL;
1665 EXPORT_SYMBOL(tgt_io_thread_done);
1668 * Helper function for getting Data-on-MDT file server DLM lock
1669 * if asked by client.
1671 int tgt_mdt_data_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
1672 struct lustre_handle *lh, int mode, __u64 *flags)
1674 union ldlm_policy_data policy = {
1675 .l_inodebits.bits = MDS_INODELOCK_DOM,
1681 LASSERT(lh != NULL);
1682 LASSERT(ns != NULL);
1683 LASSERT(!lustre_handle_is_used(lh));
1685 rc = ldlm_cli_enqueue_local(NULL, ns, res_id, LDLM_IBITS, &policy, mode,
1686 flags, ldlm_blocking_ast,
1687 ldlm_completion_ast, ldlm_glimpse_ast,
1688 NULL, 0, LVB_T_NONE, NULL, lh);
1690 RETURN(rc == ELDLM_OK ? 0 : -EIO);
1692 EXPORT_SYMBOL(tgt_mdt_data_lock);
1695 * Helper function for getting server side [start, start+count] DLM lock
1696 * if asked by client.
1698 int tgt_extent_lock(const struct lu_env *env, struct ldlm_namespace *ns,
1699 struct ldlm_res_id *res_id, __u64 start, __u64 end,
1700 struct lustre_handle *lh, int mode, __u64 *flags)
1702 union ldlm_policy_data policy;
1707 LASSERT(lh != NULL);
1708 LASSERT(ns != NULL);
1709 LASSERT(!lustre_handle_is_used(lh));
1711 policy.l_extent.gid = 0;
1712 policy.l_extent.start = start & PAGE_MASK;
1715 * If ->o_blocks is EOF it means "lock till the end of the file".
1716 * Otherwise, it's size of an extent or hole being punched (in bytes).
1718 if (end == OBD_OBJECT_EOF || end < start)
1719 policy.l_extent.end = OBD_OBJECT_EOF;
1721 policy.l_extent.end = end | ~PAGE_MASK;
1723 rc = ldlm_cli_enqueue_local(env, ns, res_id, LDLM_EXTENT, &policy,
1724 mode, flags, ldlm_blocking_ast,
1725 ldlm_completion_ast, ldlm_glimpse_ast,
1726 NULL, 0, LVB_T_NONE, NULL, lh);
1727 RETURN(rc == ELDLM_OK ? 0 : -EIO);
1729 EXPORT_SYMBOL(tgt_extent_lock);
1731 static int tgt_data_lock(const struct lu_env *env, struct obd_export *exp,
1732 struct ldlm_res_id *res_id, __u64 start, __u64 end,
1733 struct lustre_handle *lh, enum ldlm_mode mode)
1735 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
1738 /* MDT IO for data-on-mdt */
1739 if (exp->exp_connect_data.ocd_connect_flags & OBD_CONNECT_IBITS)
1740 return tgt_mdt_data_lock(ns, res_id, lh, mode, &flags);
1742 return tgt_extent_lock(env, ns, res_id, start, end, lh, mode, &flags);
1745 void tgt_data_unlock(struct lustre_handle *lh, enum ldlm_mode mode)
1747 LASSERT(lustre_handle_is_used(lh));
1748 ldlm_lock_decref(lh, mode);
1750 EXPORT_SYMBOL(tgt_data_unlock);
1752 static int tgt_brw_lock(const struct lu_env *env, struct obd_export *exp,
1753 struct ldlm_res_id *res_id, struct obd_ioobj *obj,
1754 struct niobuf_remote *nb, struct lustre_handle *lh,
1755 enum ldlm_mode mode)
1757 int nrbufs = obj->ioo_bufcnt;
1762 LASSERT(mode == LCK_PR || mode == LCK_PW);
1763 LASSERT(!lustre_handle_is_used(lh));
1765 if (exp->exp_obd->obd_recovering)
1768 if (nrbufs == 0 || !(nb[0].rnb_flags & OBD_BRW_SRVLOCK))
1771 for (i = 1; i < nrbufs; i++)
1772 if (!(nb[i].rnb_flags & OBD_BRW_SRVLOCK))
1775 return tgt_data_lock(env, exp, res_id, nb[0].rnb_offset,
1776 nb[nrbufs - 1].rnb_offset +
1777 nb[nrbufs - 1].rnb_len - 1, lh, mode);
1780 static void tgt_brw_unlock(struct obd_export *exp, struct obd_ioobj *obj,
1781 struct niobuf_remote *niob,
1782 struct lustre_handle *lh, enum ldlm_mode mode)
1786 LASSERT(mode == LCK_PR || mode == LCK_PW);
1787 LASSERT((!exp->exp_obd->obd_recovering && obj->ioo_bufcnt &&
1788 niob[0].rnb_flags & OBD_BRW_SRVLOCK) ==
1789 lustre_handle_is_used(lh));
1791 if (lustre_handle_is_used(lh))
1792 tgt_data_unlock(lh, mode);
1796 static int tgt_checksum_niobuf(struct lu_target *tgt,
1797 struct niobuf_local *local_nb, int npages,
1798 int opc, enum cksum_types cksum_type,
1801 struct ahash_request *req;
1802 unsigned int bufsize;
1804 unsigned char cfs_alg = cksum_obd2cfs(cksum_type);
1806 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1808 CERROR("%s: unable to initialize checksum hash %s\n",
1809 tgt_name(tgt), cfs_crypto_hash_name(cfs_alg));
1810 return PTR_ERR(req);
1813 CDEBUG(D_INFO, "Checksum for algo %s\n", cfs_crypto_hash_name(cfs_alg));
1814 for (i = 0; i < npages; i++) {
1815 /* corrupt the data before we compute the checksum, to
1816 * simulate a client->OST data error */
1817 if (i == 0 && opc == OST_WRITE &&
1818 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) {
1819 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
1820 int len = local_nb[i].lnb_len;
1821 struct page *np = tgt_page_to_corrupt;
1824 char *ptr = kmap_atomic(local_nb[i].lnb_page);
1825 char *ptr2 = page_address(np);
1827 memcpy(ptr2 + off, ptr + off, len);
1828 memcpy(ptr2 + off, "bad3", min(4, len));
1831 /* LU-8376 to preserve original index for
1832 * display in dump_all_bulk_pages() */
1835 cfs_crypto_hash_update_page(req, np, off,
1839 CERROR("%s: can't alloc page for corruption\n",
1843 cfs_crypto_hash_update_page(req, local_nb[i].lnb_page,
1844 local_nb[i].lnb_page_offset & ~PAGE_MASK,
1845 local_nb[i].lnb_len);
1847 /* corrupt the data after we compute the checksum, to
1848 * simulate an OST->client data error */
1849 if (i == 0 && opc == OST_READ &&
1850 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND)) {
1851 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
1852 int len = local_nb[i].lnb_len;
1853 struct page *np = tgt_page_to_corrupt;
1856 char *ptr = kmap_atomic(local_nb[i].lnb_page);
1857 char *ptr2 = page_address(np);
1859 memcpy(ptr2 + off, ptr + off, len);
1860 memcpy(ptr2 + off, "bad4", min(4, len));
1863 /* LU-8376 to preserve original index for
1864 * display in dump_all_bulk_pages() */
1867 cfs_crypto_hash_update_page(req, np, off,
1871 CERROR("%s: can't alloc page for corruption\n",
1877 bufsize = sizeof(*cksum);
1878 err = cfs_crypto_hash_final(req, (unsigned char *)cksum, &bufsize);
1883 char dbgcksum_file_name[PATH_MAX];
1885 static void dump_all_bulk_pages(struct obdo *oa, int count,
1886 struct niobuf_local *local_nb,
1887 __u32 server_cksum, __u32 client_cksum)
1894 /* will only keep dump of pages on first error for the same range in
1895 * file/fid, not during the resends/retries. */
1896 snprintf(dbgcksum_file_name, sizeof(dbgcksum_file_name),
1897 "%s-checksum_dump-ost-"DFID":[%llu-%llu]-%x-%x",
1898 (strncmp(libcfs_debug_file_path, "NONE", 4) != 0 ?
1899 libcfs_debug_file_path : LIBCFS_DEBUG_FILE_PATH_DEFAULT),
1900 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1901 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1902 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1903 local_nb[0].lnb_file_offset,
1904 local_nb[count-1].lnb_file_offset +
1905 local_nb[count-1].lnb_len - 1, client_cksum, server_cksum);
1906 CWARN("dumping checksum data to %s\n", dbgcksum_file_name);
1907 filp = filp_open(dbgcksum_file_name,
1908 O_CREAT | O_EXCL | O_WRONLY | O_LARGEFILE, 0600);
1912 CDEBUG(D_INFO, "%s: can't open to dump pages with "
1913 "checksum error: rc = %d\n", dbgcksum_file_name,
1916 CERROR("%s: can't open to dump pages with checksum "
1917 "error: rc = %d\n", dbgcksum_file_name, rc);
1921 for (i = 0; i < count; i++) {
1922 len = local_nb[i].lnb_len;
1923 buf = kmap(local_nb[i].lnb_page);
1925 rc = cfs_kernel_write(filp, buf, len, &filp->f_pos);
1927 CERROR("%s: wanted to write %u but got %d "
1928 "error\n", dbgcksum_file_name, len, rc);
1934 kunmap(local_nb[i].lnb_page);
1937 rc = vfs_fsync_range(filp, 0, LLONG_MAX, 1);
1939 CERROR("%s: sync returns %d\n", dbgcksum_file_name, rc);
1940 filp_close(filp, NULL);
1942 libcfs_debug_dumplog();
1945 static int check_read_checksum(struct niobuf_local *local_nb, int npages,
1946 struct obd_export *exp, struct obdo *oa,
1947 const struct lnet_process_id *peer,
1948 __u32 client_cksum, __u32 server_cksum,
1949 enum cksum_types server_cksum_type)
1952 enum cksum_types cksum_type;
1955 if (unlikely(npages <= 0))
1958 /* unlikely to happen and only if resend does not occur due to cksum
1959 * control failure on Client */
1960 if (unlikely(server_cksum == client_cksum)) {
1961 CDEBUG(D_PAGE, "checksum %x confirmed upon retry\n",
1966 if (exp->exp_obd->obd_checksum_dump)
1967 dump_all_bulk_pages(oa, npages, local_nb, server_cksum,
1970 cksum_type = obd_cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1973 if (cksum_type != server_cksum_type)
1974 msg = "the server may have not used the checksum type specified"
1975 " in the original request - likely a protocol problem";
1977 msg = "should have changed on the client or in transit";
1979 start = local_nb[0].lnb_file_offset;
1980 end = local_nb[npages-1].lnb_file_offset +
1981 local_nb[npages-1].lnb_len - 1;
1983 LCONSOLE_ERROR_MSG(0x132, "%s: BAD READ CHECKSUM: %s: from %s inode "
1984 DFID " object "DOSTID" extent [%llu-%llu], client returned csum"
1985 " %x (type %x), server csum %x (type %x)\n",
1986 exp->exp_obd->obd_name,
1987 msg, libcfs_nid2str(peer->nid),
1988 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : 0ULL,
1989 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1990 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1992 start, end, client_cksum, cksum_type, server_cksum,
1998 static int tgt_pages2shortio(struct niobuf_local *local, int npages,
1999 unsigned char *buf, int size)
2001 int i, off, len, copied = size;
2004 for (i = 0; i < npages; i++) {
2005 off = local[i].lnb_page_offset & ~PAGE_MASK;
2006 len = local[i].lnb_len;
2008 CDEBUG(D_PAGE, "index %d offset = %d len = %d left = %d\n",
2013 ptr = kmap_atomic(local[i].lnb_page);
2014 memcpy(buf, ptr + off, len);
2019 return copied - size;
2022 static int tgt_checksum_niobuf_t10pi(struct lu_target *tgt,
2023 struct niobuf_local *local_nb, int npages,
2024 int opc, obd_dif_csum_fn *fn,
2025 int sector_size, u32 *check_sum,
2028 enum cksum_types t10_cksum_type = tgt->lut_dt_conf.ddp_t10_cksum_type;
2029 unsigned char cfs_alg = cksum_obd2cfs(OBD_CKSUM_T10_TOP);
2030 const char *obd_name = tgt->lut_obd->obd_name;
2031 struct ahash_request *req;
2032 unsigned int bufsize;
2033 unsigned char *buffer;
2034 struct page *__page;
2037 int used_number = 0;
2043 __page = alloc_page(GFP_KERNEL);
2047 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
2050 CERROR("%s: unable to initialize checksum hash %s: rc = %d\n",
2051 tgt_name(tgt), cfs_crypto_hash_name(cfs_alg), rc);
2055 buffer = kmap(__page);
2056 guard_start = (__u16 *)buffer;
2057 guard_number = PAGE_SIZE / sizeof(*guard_start);
2058 if (unlikely(resend))
2059 CDEBUG(D_PAGE | D_HA, "GRD tags per page = %u\n", guard_number);
2060 for (i = 0; i < npages; i++) {
2063 /* corrupt the data before we compute the checksum, to
2064 * simulate a client->OST data error */
2065 if (i == 0 && opc == OST_WRITE &&
2066 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) {
2067 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
2068 int len = local_nb[i].lnb_len;
2069 struct page *np = tgt_page_to_corrupt;
2072 char *ptr = kmap_atomic(local_nb[i].lnb_page);
2073 char *ptr2 = page_address(np);
2075 memcpy(ptr2 + off, ptr + off, len);
2076 memcpy(ptr2 + off, "bad3", min(4, len));
2079 /* LU-8376 to preserve original index for
2080 * display in dump_all_bulk_pages() */
2083 cfs_crypto_hash_update_page(req, np, off,
2087 CERROR("%s: can't alloc page for corruption\n",
2093 * The left guard number should be able to hold checksums of a
2096 use_t10_grd = t10_cksum_type && opc == OST_READ &&
2097 local_nb[i].lnb_len == PAGE_SIZE &&
2098 local_nb[i].lnb_guard_disk;
2100 used = DIV_ROUND_UP(local_nb[i].lnb_len, sector_size);
2101 if (used > (guard_number - used_number)) {
2105 memcpy(guard_start + used_number,
2106 local_nb[i].lnb_guards,
2107 used * sizeof(*guard_start));
2108 if (unlikely(resend))
2109 CDEBUG(D_PAGE | D_HA,
2110 "lnb[%u]: used %u off %u+%u lnb checksum: %*phN\n",
2112 local_nb[i].lnb_page_offset,
2113 local_nb[i].lnb_len,
2114 (int)(used * sizeof(*guard_start)),
2115 guard_start + used_number);
2117 if (!use_t10_grd || unlikely(resend)) {
2118 __u16 guard_tmp[MAX_GUARD_NUMBER];
2119 __u16 *guards = guard_start + used_number;
2120 int used_tmp = -1, *usedp = &used;
2122 if (unlikely(use_t10_grd)) {
2126 rc = obd_page_dif_generate_buffer(obd_name,
2127 local_nb[i].lnb_page,
2128 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2129 local_nb[i].lnb_len, guards,
2130 guard_number - used_number, usedp, sector_size,
2132 if (unlikely(resend)) {
2133 bool bad = use_t10_grd &&
2135 local_nb[i].lnb_guards,
2136 used_tmp * sizeof(*guard_tmp));
2139 CERROR("lnb[%u]: used %u/%u off %u+%u tmp checksum: %*phN\n",
2141 local_nb[i].lnb_page_offset,
2142 local_nb[i].lnb_len,
2143 (int)(used_tmp * sizeof(*guard_start)),
2145 CDEBUG_LIMIT(D_PAGE | D_HA | (bad ? D_ERROR : 0),
2146 "lnb[%u]: used %u/%u off %u+%u gen checksum: %*phN\n",
2148 local_nb[i].lnb_page_offset,
2149 local_nb[i].lnb_len,
2150 (int)(used * sizeof(*guard_start)),
2151 guard_start + used_number);
2157 LASSERT(used <= MAX_GUARD_NUMBER);
2159 * If disk support T10PI checksum, copy guards to local_nb.
2160 * If the write is partial page, do not use the guards for bio
2161 * submission since the data might not be full-sector. The bio
2162 * guards will be generated later based on the full sectors. If
2163 * the sector size is 512B rather than 4 KB, or the page size
2164 * is larger than 4KB, this might drop some useful guards for
2165 * partial page write, but it will only add minimal extra time
2166 * of checksum calculation.
2168 if (t10_cksum_type && opc == OST_WRITE &&
2169 local_nb[i].lnb_len == PAGE_SIZE) {
2170 local_nb[i].lnb_guard_rpc = 1;
2171 memcpy(local_nb[i].lnb_guards,
2172 guard_start + used_number,
2173 used * sizeof(*local_nb[i].lnb_guards));
2176 used_number += used;
2177 if (used_number == guard_number) {
2178 cfs_crypto_hash_update_page(req, __page, 0,
2179 used_number * sizeof(*guard_start));
2183 /* corrupt the data after we compute the checksum, to
2184 * simulate an OST->client data error */
2185 if (unlikely(i == 0 && opc == OST_READ &&
2186 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND))) {
2187 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
2188 int len = local_nb[i].lnb_len;
2189 struct page *np = tgt_page_to_corrupt;
2192 char *ptr = kmap_atomic(local_nb[i].lnb_page);
2193 char *ptr2 = page_address(np);
2195 memcpy(ptr2 + off, ptr + off, len);
2196 memcpy(ptr2 + off, "bad4", min(4, len));
2199 /* LU-8376 to preserve original index for
2200 * display in dump_all_bulk_pages() */
2203 cfs_crypto_hash_update_page(req, np, off,
2207 CERROR("%s: can't alloc page for corruption\n",
2216 if (used_number != 0)
2217 cfs_crypto_hash_update_page(req, __page, 0,
2218 used_number * sizeof(*guard_start));
2220 bufsize = sizeof(cksum);
2221 rc = cfs_crypto_hash_final(req, (unsigned char *)&cksum, &bufsize);
2226 __free_page(__page);
2230 static int tgt_checksum_niobuf_rw(struct lu_target *tgt,
2231 enum cksum_types cksum_type,
2232 struct niobuf_local *local_nb,
2233 int npages, int opc, u32 *check_sum,
2236 obd_dif_csum_fn *fn = NULL;
2237 int sector_size = 0;
2241 obd_t10_cksum2dif(cksum_type, &fn, §or_size);
2244 rc = tgt_checksum_niobuf_t10pi(tgt, local_nb, npages,
2245 opc, fn, sector_size,
2248 rc = tgt_checksum_niobuf(tgt, local_nb, npages, opc,
2249 cksum_type, check_sum);
2254 int tgt_brw_read(struct tgt_session_info *tsi)
2256 struct ptlrpc_request *req = tgt_ses_req(tsi);
2257 struct ptlrpc_bulk_desc *desc = NULL;
2258 struct obd_export *exp = tsi->tsi_exp;
2259 struct niobuf_remote *remote_nb;
2260 struct niobuf_local *local_nb;
2261 struct obd_ioobj *ioo;
2262 struct ost_body *body, *repbody;
2263 struct lustre_handle lockh = { 0 };
2264 int npages, nob = 0, rc, i, no_reply = 0,
2266 struct tgt_thread_big_cache *tbc = req->rq_svc_thread->t_data;
2267 const char *obd_name = exp->exp_obd->obd_name;
2272 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL &&
2273 ptlrpc_req2svc(req)->srv_req_portal != MDS_IO_PORTAL) {
2274 CERROR("%s: deny read request from %s to portal %u\n",
2275 tgt_name(tsi->tsi_tgt),
2276 obd_export_nid2str(req->rq_export),
2277 ptlrpc_req2svc(req)->srv_req_portal);
2281 req->rq_bulk_read = 1;
2283 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_READ_BULK)) {
2284 /* optionally use cfs_fail_val - 1 to select a specific OST on
2285 * this server to fail requests.
2287 char fail_ost_name[MAX_OBD_NAME];
2289 if (cfs_fail_val > 0) {
2290 snprintf(fail_ost_name, MAX_OBD_NAME, "OST%04X",
2293 if (strstr(obd_name, fail_ost_name))
2294 RETURN(err_serious(-EIO));
2296 RETURN(err_serious(-EIO));
2300 OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, cfs_fail_val > 0 ?
2301 cfs_fail_val : (obd_timeout + 1) / 4);
2303 /* Check if there is eviction in progress, and if so, wait for it to
2305 if (unlikely(atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
2306 /* We do not care how long it takes */
2308 exp->exp_obd->obd_evict_inprogress_waitq,
2309 !atomic_read(&exp->exp_obd->obd_evict_inprogress));
2312 /* There must be big cache in current thread to process this request
2313 * if it is NULL then something went wrong and it wasn't allocated,
2314 * report -ENOMEM in that case */
2318 body = tsi->tsi_ost_body;
2319 LASSERT(body != NULL);
2321 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2322 body->oa.o_flags & OBD_FL_NORPC)
2325 ioo = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_IOOBJ);
2326 LASSERT(ioo != NULL); /* must exists after tgt_ost_body_unpack */
2328 remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
2329 LASSERT(remote_nb != NULL); /* must exists after tgt_ost_body_unpack */
2331 local_nb = tbc->local;
2333 rc = tgt_brw_lock(tsi->tsi_env, exp, &tsi->tsi_resid, ioo, remote_nb,
2339 * If getting the lock took more time than
2340 * client was willing to wait, drop it. b=11330
2342 if (ktime_get_real_seconds() > req->rq_deadline ||
2343 OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
2345 CERROR("Dropping timed-out read from %s because locking object " DOSTID " took %lld seconds (limit was %lld).\n",
2346 libcfs_id2str(req->rq_peer), POSTID(&ioo->ioo_oid),
2347 ktime_get_real_seconds() - req->rq_arrival_time.tv_sec,
2348 req->rq_deadline - req->rq_arrival_time.tv_sec);
2349 GOTO(out_lock, rc = -ETIMEDOUT);
2353 * Because we already sync grant info with client when
2354 * reconnect, grant info will be cleared for resent req,
2355 * otherwise, outdated grant count in the rpc would de-sync
2356 * grant counters in case of shrink
2358 if (lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY)) {
2359 DEBUG_REQ(D_CACHE, req, "clear resent/replay req grant info");
2360 body->oa.o_valid &= ~OBD_MD_FLGRANT;
2363 repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
2364 repbody->oa = body->oa;
2366 npages = PTLRPC_MAX_BRW_PAGES;
2367 kstart = ktime_get();
2368 rc = obd_preprw(tsi->tsi_env, OBD_BRW_READ, exp, &repbody->oa, 1,
2369 ioo, remote_nb, &npages, local_nb);
2373 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2374 body->oa.o_flags & OBD_FL_SHORT_IO) {
2377 desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
2378 PTLRPC_BULK_PUT_SOURCE,
2380 &ptlrpc_bulk_kiov_nopin_ops);
2382 GOTO(out_commitrw, rc = -ENOMEM);
2385 npages_read = npages;
2386 for (i = 0; i < npages; i++) {
2387 int page_rc = local_nb[i].lnb_rc;
2396 if (page_rc != 0 && desc != NULL) { /* some data! */
2397 LASSERT(local_nb[i].lnb_page != NULL);
2398 desc->bd_frag_ops->add_kiov_frag
2399 (desc, local_nb[i].lnb_page,
2400 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2404 if (page_rc != local_nb[i].lnb_len) { /* short read */
2405 local_nb[i].lnb_len = page_rc;
2406 npages_read = i + (page_rc != 0 ? 1 : 0);
2407 /* All subsequent pages should be 0 */
2408 while (++i < npages)
2409 LASSERT(local_nb[i].lnb_rc == 0);
2414 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
2415 u32 flag = body->oa.o_valid & OBD_MD_FLFLAGS ?
2416 body->oa.o_flags : 0;
2417 enum cksum_types cksum_type = obd_cksum_type_unpack(flag);
2418 bool resend = (body->oa.o_valid & OBD_MD_FLFLAGS) &&
2419 (body->oa.o_flags & OBD_FL_RECOV_RESEND);
2421 repbody->oa.o_flags = obd_cksum_type_pack(obd_name,
2423 repbody->oa.o_valid = OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
2425 rc = tgt_checksum_niobuf_rw(tsi->tsi_tgt, cksum_type,
2426 local_nb, npages_read, OST_READ,
2427 &repbody->oa.o_cksum, resend);
2429 GOTO(out_commitrw, rc);
2430 CDEBUG(D_PAGE | (resend ? D_HA : 0),
2431 "checksum at read origin: %x (%x)\n",
2432 repbody->oa.o_cksum, cksum_type);
2434 /* if a resend it could be for a cksum error, so check Server
2435 * cksum with returned Client cksum (this should even cover
2436 * zero-cksum case) */
2438 check_read_checksum(local_nb, npages_read, exp,
2439 &body->oa, &req->rq_peer,
2441 repbody->oa.o_cksum, cksum_type);
2443 repbody->oa.o_valid = 0;
2445 if (body->oa.o_valid & OBD_MD_FLGRANT)
2446 repbody->oa.o_valid |= OBD_MD_FLGRANT;
2447 /* We're finishing using body->oa as an input variable */
2449 /* Check if client was evicted while we were doing i/o before touching
2452 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2453 body->oa.o_flags & OBD_FL_SHORT_IO) {
2454 unsigned char *short_io_buf;
2457 short_io_buf = req_capsule_server_get(&req->rq_pill,
2459 short_io_size = req_capsule_get_size(&req->rq_pill,
2462 rc = tgt_pages2shortio(local_nb, npages_read,
2463 short_io_buf, short_io_size);
2465 req_capsule_shrink(&req->rq_pill,
2468 rc = rc > 0 ? 0 : rc;
2469 } else if (!CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)) {
2470 rc = target_bulk_io(exp, desc);
2474 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2475 body->oa.o_flags & OBD_FL_SHORT_IO)
2476 req_capsule_shrink(&req->rq_pill, &RMF_SHORT_IO, 0,
2481 /* Must commit after prep above in all cases */
2482 rc = obd_commitrw(tsi->tsi_env, OBD_BRW_READ, exp, &repbody->oa, 1, ioo,
2483 remote_nb, npages, local_nb, rc, nob, kstart);
2485 tgt_brw_unlock(exp, ioo, remote_nb, &lockh, LCK_PR);
2487 if (desc && !CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2))
2488 ptlrpc_free_bulk(desc);
2493 ptlrpc_lprocfs_brw(req, nob);
2494 } else if (no_reply) {
2495 req->rq_no_reply = 1;
2496 /* reply out callback would free */
2497 ptlrpc_req_drop_rs(req);
2498 LCONSOLE_WARN("%s: Bulk IO read error with %s (at %s), "
2499 "client will retry: rc %d\n",
2501 obd_uuid2str(&exp->exp_client_uuid),
2502 obd_export_nid2str(exp), rc);
2504 /* send a bulk after reply to simulate a network delay or reordering
2505 * by a router - Note that !desc implies short io, so there is no bulk
2507 if (unlikely(CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)) &&
2509 /* Calculate checksum before request transfer, original
2510 * it is done by target_bulk_io() */
2511 rc = sptlrpc_svc_wrap_bulk(req, desc);
2512 if (OCD_HAS_FLAG(&exp->exp_connect_data, BULK_MBITS))
2513 req->rq_mbits = lustre_msg_get_mbits(req->rq_reqmsg);
2514 else /* old version, bulk matchbits is rq_xid */
2515 req->rq_mbits = req->rq_xid;
2517 req->rq_status = rc;
2518 target_committed_to_req(req);
2519 target_send_reply(req, 0, 0);
2521 CDEBUG(D_INFO, "reorder BULK\n");
2522 OBD_FAIL_TIMEOUT(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2,
2523 cfs_fail_val ? : 3);
2525 target_bulk_io(exp, desc);
2526 ptlrpc_free_bulk(desc);
2531 EXPORT_SYMBOL(tgt_brw_read);
2533 static int tgt_shortio2pages(struct niobuf_local *local, int npages,
2534 unsigned char *buf, unsigned int size)
2539 for (i = 0; i < npages; i++) {
2540 off = local[i].lnb_page_offset & ~PAGE_MASK;
2541 len = local[i].lnb_len;
2546 CDEBUG(D_PAGE, "index %d offset = %d len = %d left = %d\n",
2548 ptr = kmap_atomic(local[i].lnb_page);
2551 memcpy(ptr + off, buf, len < size ? len : size);
2559 static void tgt_warn_on_cksum(struct ptlrpc_request *req,
2560 struct ptlrpc_bulk_desc *desc,
2561 struct niobuf_local *local_nb, int npages,
2562 u32 client_cksum, u32 server_cksum,
2565 struct obd_export *exp = req->rq_export;
2566 struct ost_body *body;
2570 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2571 LASSERT(body != NULL);
2573 if (desc && req->rq_peer.nid != desc->bd_sender) {
2575 router = libcfs_nid2str(desc->bd_sender);
2578 if (exp->exp_obd->obd_checksum_dump)
2579 dump_all_bulk_pages(&body->oa, npages, local_nb, server_cksum,
2583 CDEBUG_LIMIT(D_INFO, "client csum %x, server csum %x\n",
2584 client_cksum, server_cksum);
2588 LCONSOLE_ERROR_MSG(0x168, "%s: BAD WRITE CHECKSUM: from %s%s%s inode "
2589 DFID" object "DOSTID" extent [%llu-%llu"
2590 "]: client csum %x, server csum %x\n",
2591 exp->exp_obd->obd_name, libcfs_id2str(req->rq_peer),
2593 body->oa.o_valid & OBD_MD_FLFID ?
2594 body->oa.o_parent_seq : (__u64)0,
2595 body->oa.o_valid & OBD_MD_FLFID ?
2596 body->oa.o_parent_oid : 0,
2597 body->oa.o_valid & OBD_MD_FLFID ?
2598 body->oa.o_parent_ver : 0,
2599 POSTID(&body->oa.o_oi),
2600 local_nb[0].lnb_file_offset,
2601 local_nb[npages-1].lnb_file_offset +
2602 local_nb[npages - 1].lnb_len - 1,
2603 client_cksum, server_cksum);
2606 int tgt_brw_write(struct tgt_session_info *tsi)
2608 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
2609 struct ptlrpc_request *req = tgt_ses_req(tsi);
2610 struct ptlrpc_bulk_desc *desc = NULL;
2611 struct obd_export *exp = req->rq_export;
2612 struct niobuf_remote *remote_nb;
2613 struct niobuf_local *local_nb;
2614 struct obd_ioobj *ioo;
2615 struct ost_body *body, *repbody;
2616 struct lustre_handle lockh = {0};
2618 int objcount, niocount, npages;
2621 enum cksum_types cksum_type = OBD_CKSUM_CRC32;
2622 bool no_reply = false, mmap;
2623 struct tgt_thread_big_cache *tbc = req->rq_svc_thread->t_data;
2624 bool wait_sync = false;
2625 const char *obd_name = exp->exp_obd->obd_name;
2626 /* '1' for consistency with code that checks !mpflag to restore */
2627 unsigned int mpflags = 1;
2633 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL &&
2634 ptlrpc_req2svc(req)->srv_req_portal != MDS_IO_PORTAL) {
2635 CERROR("%s: deny write request from %s to portal %u\n",
2636 tgt_name(tsi->tsi_tgt),
2637 obd_export_nid2str(req->rq_export),
2638 ptlrpc_req2svc(req)->srv_req_portal);
2639 RETURN(err_serious(-EPROTO));
2642 if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOSPC))
2643 RETURN(err_serious(-ENOSPC));
2644 if (OBD_FAIL_TIMEOUT(OBD_FAIL_OST_EROFS, 1))
2645 RETURN(err_serious(-EROFS));
2647 req->rq_bulk_write = 1;
2649 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
2651 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK2))
2654 /* optionally use cfs_fail_val - 1 to select a specific OST on
2655 * this server to fail requests.
2657 char fail_ost_name[MAX_OBD_NAME];
2659 if (cfs_fail_val > 0) {
2660 snprintf(fail_ost_name, MAX_OBD_NAME, "OST%04X",
2663 if (strstr(obd_name, fail_ost_name))
2664 RETURN(err_serious(rc));
2666 RETURN(err_serious(rc));
2670 /* pause before transaction has been started */
2671 CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, cfs_fail_val > 0 ?
2672 cfs_fail_val : (obd_timeout + 1) / 4);
2674 /* Delay write commit to show stale size information */
2675 CFS_FAIL_TIMEOUT(OBD_FAIL_OSC_NO_SIZE_DATA, cfs_fail_val);
2677 /* There must be big cache in current thread to process this request
2678 * if it is NULL then something went wrong and it wasn't allocated,
2679 * report -ENOMEM in that case */
2683 body = tsi->tsi_ost_body;
2684 LASSERT(body != NULL);
2686 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2687 body->oa.o_flags & OBD_FL_NORPC)
2691 ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
2692 LASSERT(ioo != NULL); /* must exists after tgt_ost_body_unpack */
2694 objcount = req_capsule_get_size(&req->rq_pill, &RMF_OBD_IOOBJ,
2695 RCL_CLIENT) / sizeof(*ioo);
2697 for (niocount = i = 0; i < objcount; i++)
2698 niocount += ioo[i].ioo_bufcnt;
2700 remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
2701 LASSERT(remote_nb != NULL); /* must exists after tgt_ost_body_unpack */
2702 if (niocount != req_capsule_get_size(&req->rq_pill,
2703 &RMF_NIOBUF_REMOTE, RCL_CLIENT) /
2705 RETURN(err_serious(-EPROTO));
2707 if ((remote_nb[0].rnb_flags & OBD_BRW_MEMALLOC) &&
2708 ptlrpc_connection_is_local(exp->exp_connection))
2709 mpflags = memalloc_noreclaim_save();
2711 req_capsule_set_size(&req->rq_pill, &RMF_RCS, RCL_SERVER,
2712 niocount * sizeof(*rcs));
2713 rc = req_capsule_server_pack(&req->rq_pill);
2715 GOTO(out, rc = err_serious(rc));
2717 CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_PACK, cfs_fail_val);
2718 rcs = req_capsule_server_get(&req->rq_pill, &RMF_RCS);
2720 local_nb = tbc->local;
2722 rc = tgt_brw_lock(tsi->tsi_env, exp, &tsi->tsi_resid, ioo, remote_nb,
2728 * If getting the lock took more time than
2729 * client was willing to wait, drop it. b=11330
2731 if (ktime_get_real_seconds() > req->rq_deadline ||
2732 OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
2734 CERROR("%s: Dropping timed-out write from %s because locking object " DOSTID " took %lld seconds (limit was %lld).\n",
2735 tgt_name(tsi->tsi_tgt), libcfs_id2str(req->rq_peer),
2736 POSTID(&ioo->ioo_oid),
2737 ktime_get_real_seconds() - req->rq_arrival_time.tv_sec,
2738 req->rq_deadline - req->rq_arrival_time.tv_sec);
2739 GOTO(out_lock, rc = -ETIMEDOUT);
2742 /* Because we already sync grant info with client when reconnect,
2743 * grant info will be cleared for resent req, then fed_grant and
2744 * total_grant will not be modified in following preprw_write */
2745 if (lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY)) {
2746 DEBUG_REQ(D_CACHE, req, "clear resent/replay req grant info");
2747 body->oa.o_valid &= ~OBD_MD_FLGRANT;
2750 repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
2751 if (repbody == NULL)
2752 GOTO(out_lock, rc = -ENOMEM);
2753 repbody->oa = body->oa;
2755 npages = PTLRPC_MAX_BRW_PAGES;
2756 kstart = ktime_get();
2757 rc = obd_preprw(tsi->tsi_env, OBD_BRW_WRITE, exp, &repbody->oa,
2758 objcount, ioo, remote_nb, &npages, local_nb);
2761 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2762 body->oa.o_flags & OBD_FL_SHORT_IO) {
2763 unsigned int short_io_size;
2764 unsigned char *short_io_buf;
2766 short_io_size = req_capsule_get_size(&req->rq_pill,
2769 short_io_buf = req_capsule_client_get(&req->rq_pill,
2771 CDEBUG(D_INFO, "Client use short io for data transfer,"
2772 " size = %d\n", short_io_size);
2774 /* Copy short io buf to pages */
2775 rc = tgt_shortio2pages(local_nb, npages, short_io_buf,
2779 desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
2780 PTLRPC_BULK_GET_SINK,
2782 &ptlrpc_bulk_kiov_nopin_ops);
2784 GOTO(skip_transfer, rc = -ENOMEM);
2786 /* NB Having prepped, we must commit... */
2787 for (i = 0; i < npages; i++)
2788 desc->bd_frag_ops->add_kiov_frag(desc,
2789 local_nb[i].lnb_page,
2790 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2791 local_nb[i].lnb_len);
2793 rc = sptlrpc_svc_prep_bulk(req, desc);
2795 GOTO(skip_transfer, rc);
2797 rc = target_bulk_io(exp, desc);
2803 if (body->oa.o_valid & OBD_MD_FLCKSUM && rc == 0) {
2804 static int cksum_counter;
2806 if (body->oa.o_valid & OBD_MD_FLFLAGS)
2807 cksum_type = obd_cksum_type_unpack(body->oa.o_flags);
2809 repbody->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
2810 repbody->oa.o_flags &= ~OBD_FL_CKSUM_ALL;
2811 repbody->oa.o_flags |= obd_cksum_type_pack(obd_name,
2814 rc = tgt_checksum_niobuf_rw(tsi->tsi_tgt, cksum_type,
2815 local_nb, npages, OST_WRITE,
2816 &repbody->oa.o_cksum, false);
2818 GOTO(out_commitrw, rc);
2822 if (unlikely(body->oa.o_cksum != repbody->oa.o_cksum)) {
2823 mmap = (body->oa.o_valid & OBD_MD_FLFLAGS &&
2824 body->oa.o_flags & OBD_FL_MMAP);
2826 tgt_warn_on_cksum(req, desc, local_nb, npages,
2828 repbody->oa.o_cksum, mmap);
2830 } else if ((cksum_counter & (-cksum_counter)) ==
2832 CDEBUG(D_INFO, "Checksum %u from %s OK: %x\n",
2833 cksum_counter, libcfs_id2str(req->rq_peer),
2834 repbody->oa.o_cksum);
2838 OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK2, cfs_fail_val);
2841 /* calculate the expected actual write bytes (nob) for OFD stats.
2842 * Technically, if commit fails this would be wrong, but that should be
2845 for (i = 0; i < niocount; i++) {
2846 int len = remote_nb[i].rnb_len;
2851 /* multiple transactions can be assigned during write commit */
2852 tti->tti_mult_trans = 1;
2854 /* Must commit after prep above in all cases */
2855 rc = obd_commitrw(tsi->tsi_env, OBD_BRW_WRITE, exp, &repbody->oa,
2856 objcount, ioo, remote_nb, npages, local_nb, rc, nob,
2858 if (rc == -ENOTCONN)
2859 /* quota acquire process has been given up because
2860 * either the client has been evicted or the client
2861 * has timed out the request already
2865 for (i = 0; i < niocount; i++) {
2866 if (!(local_nb[i].lnb_flags & OBD_BRW_ASYNC)) {
2872 * Disable sending mtime back to the client. If the client locked the
2873 * whole object, then it has already updated the mtime on its side,
2874 * otherwise it will have to glimpse anyway (see bug 21489, comment 32)
2876 repbody->oa.o_valid &= ~(OBD_MD_FLMTIME | OBD_MD_FLATIME);
2879 /* set per-requested niobuf return codes */
2880 for (i = j = 0; i < niocount; i++) {
2881 int len = remote_nb[i].rnb_len;
2885 LASSERT(j < npages);
2886 if (local_nb[j].lnb_rc < 0)
2887 rcs[i] = local_nb[j].lnb_rc;
2888 len -= local_nb[j].lnb_len;
2893 LASSERT(j == npages);
2894 ptlrpc_lprocfs_brw(req, nob);
2897 tgt_brw_unlock(exp, ioo, remote_nb, &lockh, LCK_PW);
2899 ptlrpc_free_bulk(desc);
2901 if (unlikely(no_reply || (exp->exp_obd->obd_no_transno && wait_sync))) {
2902 req->rq_no_reply = 1;
2903 /* reply out callback would free */
2904 ptlrpc_req_drop_rs(req);
2905 if (!exp->exp_obd->obd_no_transno)
2906 LCONSOLE_WARN("%s: Bulk IO write error with %s (at %s),"
2907 " client will retry: rc = %d\n",
2909 obd_uuid2str(&exp->exp_client_uuid),
2910 obd_export_nid2str(exp), rc);
2914 memalloc_noreclaim_restore(mpflags);
2918 EXPORT_SYMBOL(tgt_brw_write);
2921 * Common request handler for OST_SEEK RPC.
2923 * Unified request handling for OST_SEEK RPC.
2924 * It takes object by its FID, does needed lseek and packs result
2925 * into reply. Only SEEK_HOLE and SEEK_DATA are supported.
2927 * \param[in] tsi target session environment for this request
2929 * \retval 0 if successful
2930 * \retval negative value on error
2932 int tgt_lseek(struct tgt_session_info *tsi)
2934 struct lustre_handle lh = { 0 };
2935 struct dt_object *dob;
2936 struct ost_body *repbody;
2937 loff_t offset = tsi->tsi_ost_body->oa.o_size;
2938 int whence = tsi->tsi_ost_body->oa.o_mode;
2944 if (whence != SEEK_HOLE && whence != SEEK_DATA)
2947 /* Negative offset is prohibited on wire and must be handled on client
2948 * prior sending RPC.
2953 repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
2954 if (repbody == NULL)
2956 repbody->oa = tsi->tsi_ost_body->oa;
2958 srvlock = tsi->tsi_ost_body->oa.o_valid & OBD_MD_FLFLAGS &&
2959 tsi->tsi_ost_body->oa.o_flags & OBD_FL_SRVLOCK;
2961 rc = tgt_data_lock(tsi->tsi_env, tsi->tsi_exp, &tsi->tsi_resid,
2962 offset, OBD_OBJECT_EOF, &lh, LCK_PR);
2967 dob = dt_locate(tsi->tsi_env, tsi->tsi_tgt->lut_bottom, &tsi->tsi_fid);
2969 GOTO(out, rc = PTR_ERR(dob));
2971 if (!dt_object_exists(dob))
2972 GOTO(obj_put, rc = -ENOENT);
2974 repbody->oa.o_size = dt_lseek(tsi->tsi_env, dob, offset, whence);
2977 dt_object_put(tsi->tsi_env, dob);
2980 tgt_data_unlock(&lh, LCK_PR);
2984 EXPORT_SYMBOL(tgt_lseek);
2986 /* Check if request can be reconstructed from saved reply data
2987 * A copy of the reply data is returned in @trd if the pointer is not NULL
2989 int req_can_reconstruct(struct ptlrpc_request *req,
2990 struct tg_reply_data *trd)
2992 struct tg_export_data *ted = &req->rq_export->exp_target_data;
2993 struct lsd_client_data *lcd = ted->ted_lcd;
2996 if (tgt_is_multimodrpcs_client(req->rq_export))
2997 return tgt_lookup_reply(req, trd);
2999 mutex_lock(&ted->ted_lcd_lock);
3000 found = req->rq_xid == lcd->lcd_last_xid ||
3001 req->rq_xid == lcd->lcd_last_close_xid;
3003 if (found && trd != NULL) {
3004 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE) {
3005 trd->trd_reply.lrd_xid = lcd->lcd_last_close_xid;
3006 trd->trd_reply.lrd_transno =
3007 lcd->lcd_last_close_transno;
3008 trd->trd_reply.lrd_result = lcd->lcd_last_close_result;
3010 trd->trd_reply.lrd_xid = lcd->lcd_last_xid;
3011 trd->trd_reply.lrd_transno = lcd->lcd_last_transno;
3012 trd->trd_reply.lrd_result = lcd->lcd_last_result;
3013 trd->trd_reply.lrd_data = lcd->lcd_last_data;
3014 trd->trd_pre_versions[0] = lcd->lcd_pre_versions[0];
3015 trd->trd_pre_versions[1] = lcd->lcd_pre_versions[1];
3016 trd->trd_pre_versions[2] = lcd->lcd_pre_versions[2];
3017 trd->trd_pre_versions[3] = lcd->lcd_pre_versions[3];
3020 mutex_unlock(&ted->ted_lcd_lock);
3024 EXPORT_SYMBOL(req_can_reconstruct);