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 struct lu_nodemap *nm = NULL;
1039 rc = req_check_sepol(tsi->tsi_pill);
1043 if (tsi->tsi_pill->rc_req->rq_export)
1045 nodemap_get_from_exp(tsi->tsi_pill->rc_req->rq_export);
1047 if (reply->ocd_connect_flags & OBD_CONNECT_FLAGS2 &&
1048 reply->ocd_connect_flags2 & OBD_CONNECT2_ENCRYPT) {
1049 bool forbid_encrypt = true;
1052 /* nodemap_get_from_exp returns NULL in case
1053 * nodemap is not active, so we do not forbid
1055 forbid_encrypt = false;
1056 else if (!IS_ERR(nm))
1057 forbid_encrypt = nm->nmf_forbid_encryption;
1059 GOTO(put_nm, rc = -EACCES);
1062 if (!(reply->ocd_connect_flags & OBD_CONNECT_RDONLY)) {
1063 bool readonly = false;
1065 if (!IS_ERR_OR_NULL(nm))
1066 readonly = nm->nmf_readonly_mount;
1067 if (unlikely(readonly))
1068 GOTO(put_nm, rc = -EROFS);
1072 if (!IS_ERR_OR_NULL(nm))
1080 obd_disconnect(class_export_get(tsi->tsi_exp));
1083 EXPORT_SYMBOL(tgt_connect);
1085 int tgt_disconnect(struct tgt_session_info *tsi)
1091 OBD_FAIL_TIMEOUT(OBD_FAIL_OST_DISCONNECT_DELAY, cfs_fail_val);
1093 rc = target_handle_disconnect(tgt_ses_req(tsi));
1095 RETURN(err_serious(rc));
1099 EXPORT_SYMBOL(tgt_disconnect);
1102 * Unified target OBD handlers
1104 int tgt_obd_ping(struct tgt_session_info *tsi)
1110 /* The target-specific part of OBD_PING request handling.
1111 * It controls Filter Modification Data (FMD) expiration each time
1114 * Valid only for replayable targets, e.g. MDT and OFD
1116 if (tsi->tsi_exp->exp_obd->obd_replayable)
1117 tgt_fmd_expire(tsi->tsi_exp);
1119 rc = req_capsule_server_pack(tsi->tsi_pill);
1121 RETURN(err_serious(rc));
1125 EXPORT_SYMBOL(tgt_obd_ping);
1127 int tgt_obd_log_cancel(struct tgt_session_info *tsi)
1129 return err_serious(-EOPNOTSUPP);
1132 int tgt_send_buffer(struct tgt_session_info *tsi, struct lu_rdbuf *rdbuf)
1134 struct ptlrpc_request *req = tgt_ses_req(tsi);
1135 struct obd_export *exp = req->rq_export;
1136 struct ptlrpc_bulk_desc *desc;
1143 for (i = 0; i < rdbuf->rb_nbufs; i++) {
1144 unsigned int offset;
1146 offset = (unsigned long)rdbuf->rb_bufs[i].lb_buf & ~PAGE_MASK;
1147 pages += DIV_ROUND_UP(rdbuf->rb_bufs[i].lb_len + offset,
1151 desc = ptlrpc_prep_bulk_exp(req, pages, 1,
1152 PTLRPC_BULK_PUT_SOURCE,
1154 &ptlrpc_bulk_kiov_nopin_ops);
1158 for (i = 0; i < rdbuf->rb_nbufs; i++)
1159 desc->bd_frag_ops->add_iov_frag(desc,
1160 rdbuf->rb_bufs[i].lb_buf,
1161 rdbuf->rb_bufs[i].lb_len);
1163 rc = target_bulk_io(exp, desc);
1164 ptlrpc_free_bulk(desc);
1167 EXPORT_SYMBOL(tgt_send_buffer);
1169 int tgt_sendpage(struct tgt_session_info *tsi, struct lu_rdpg *rdpg, int nob)
1171 struct ptlrpc_request *req = tgt_ses_req(tsi);
1172 struct obd_export *exp = req->rq_export;
1173 struct ptlrpc_bulk_desc *desc;
1181 desc = ptlrpc_prep_bulk_exp(req, rdpg->rp_npages, 1,
1182 PTLRPC_BULK_PUT_SOURCE,
1184 &ptlrpc_bulk_kiov_pin_ops);
1188 if (!(exp_connect_flags(exp) & OBD_CONNECT_BRW_SIZE))
1189 /* old client requires reply size in it's PAGE_SIZE,
1190 * which is rdpg->rp_count */
1191 nob = rdpg->rp_count;
1193 for (i = 0, tmpcount = nob; i < rdpg->rp_npages && tmpcount > 0;
1194 i++, tmpcount -= tmpsize) {
1195 tmpsize = min_t(int, tmpcount, PAGE_SIZE);
1196 desc->bd_frag_ops->add_kiov_frag(desc, rdpg->rp_pages[i], 0,
1200 LASSERT(desc->bd_nob == nob);
1201 rc = target_bulk_io(exp, desc);
1202 ptlrpc_free_bulk(desc);
1205 EXPORT_SYMBOL(tgt_sendpage);
1208 * OBD_IDX_READ handler
1210 static int tgt_obd_idx_read(struct tgt_session_info *tsi)
1212 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
1213 struct lu_rdpg *rdpg = &tti->tti_u.rdpg.tti_rdpg;
1214 struct idx_info *req_ii, *rep_ii;
1219 memset(rdpg, 0, sizeof(*rdpg));
1220 req_capsule_set(tsi->tsi_pill, &RQF_OBD_IDX_READ);
1222 /* extract idx_info buffer from request & reply */
1223 req_ii = req_capsule_client_get(tsi->tsi_pill, &RMF_IDX_INFO);
1224 if (req_ii == NULL || req_ii->ii_magic != IDX_INFO_MAGIC)
1225 RETURN(err_serious(-EPROTO));
1227 rc = req_capsule_server_pack(tsi->tsi_pill);
1229 RETURN(err_serious(rc));
1231 rep_ii = req_capsule_server_get(tsi->tsi_pill, &RMF_IDX_INFO);
1233 RETURN(err_serious(-EFAULT));
1234 rep_ii->ii_magic = IDX_INFO_MAGIC;
1236 /* extract hash to start with */
1237 rdpg->rp_hash = req_ii->ii_hash_start;
1239 /* extract requested attributes */
1240 rdpg->rp_attrs = req_ii->ii_attrs;
1242 /* check that fid packed in request is valid and supported */
1243 if (!fid_is_sane(&req_ii->ii_fid))
1245 rep_ii->ii_fid = req_ii->ii_fid;
1248 rep_ii->ii_flags = req_ii->ii_flags;
1250 /* compute number of pages to allocate, ii_count is the number of 4KB
1252 if (req_ii->ii_count <= 0)
1253 GOTO(out, rc = -EFAULT);
1254 rdpg->rp_count = min_t(unsigned int, req_ii->ii_count << LU_PAGE_SHIFT,
1255 exp_max_brw_size(tsi->tsi_exp));
1256 rdpg->rp_npages = (rdpg->rp_count + PAGE_SIZE - 1) >> PAGE_SHIFT;
1258 /* allocate pages to store the containers */
1259 OBD_ALLOC_PTR_ARRAY(rdpg->rp_pages, rdpg->rp_npages);
1260 if (rdpg->rp_pages == NULL)
1261 GOTO(out, rc = -ENOMEM);
1262 for (i = 0; i < rdpg->rp_npages; i++) {
1263 rdpg->rp_pages[i] = alloc_page(GFP_NOFS);
1264 if (rdpg->rp_pages[i] == NULL)
1265 GOTO(out, rc = -ENOMEM);
1268 /* populate pages with key/record pairs */
1269 rc = dt_index_read(tsi->tsi_env, tsi->tsi_tgt->lut_bottom, rep_ii, rdpg);
1273 LASSERTF(rc <= rdpg->rp_count, "dt_index_read() returned more than "
1274 "asked %d > %d\n", rc, rdpg->rp_count);
1276 /* send pages to client */
1277 rc = tgt_sendpage(tsi, rdpg, rc);
1282 if (rdpg->rp_pages) {
1283 for (i = 0; i < rdpg->rp_npages; i++)
1284 if (rdpg->rp_pages[i])
1285 __free_page(rdpg->rp_pages[i]);
1286 OBD_FREE_PTR_ARRAY(rdpg->rp_pages, rdpg->rp_npages);
1291 struct tgt_handler tgt_obd_handlers[] = {
1292 TGT_OBD_HDL (0, OBD_PING, tgt_obd_ping),
1293 TGT_OBD_HDL (0, OBD_IDX_READ, tgt_obd_idx_read)
1295 EXPORT_SYMBOL(tgt_obd_handlers);
1297 int tgt_sync(const struct lu_env *env, struct lu_target *tgt,
1298 struct dt_object *obj, __u64 start, __u64 end)
1304 /* if no objid is specified, it means "sync whole filesystem" */
1306 rc = dt_sync(env, tgt->lut_bottom);
1307 } else if (dt_version_get(env, obj) >
1308 tgt->lut_obd->obd_last_committed) {
1309 rc = dt_object_sync(env, obj, start, end);
1311 atomic_inc(&tgt->lut_sync_count);
1315 EXPORT_SYMBOL(tgt_sync);
1317 * Unified target DLM handlers.
1321 * Unified target BAST
1323 * Ensure data and metadata are synced to disk when lock is canceled if Sync on
1324 * Cancel (SOC) is enabled. If it's extent lock, normally sync obj is enough,
1325 * but if it's cross-MDT lock, because remote object version is not set, a
1326 * filesystem sync is needed.
1328 * \param lock server side lock
1329 * \param desc lock desc
1330 * \param data ldlm_cb_set_arg
1331 * \param flag indicates whether this cancelling or blocking callback
1332 * \retval 0 on success
1333 * \retval negative number on error
1335 static int tgt_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
1336 void *data, int flag)
1339 struct lu_target *tgt;
1340 struct dt_object *obj = NULL;
1346 tgt = class_exp2tgt(lock->l_export);
1348 if (unlikely(tgt == NULL)) {
1349 CDEBUG(D_ERROR, "%s: No target for connected export\n",
1350 class_exp2obd(lock->l_export)->obd_name);
1354 if (flag == LDLM_CB_CANCELING &&
1355 (lock->l_granted_mode & (LCK_EX | LCK_PW | LCK_GROUP)) &&
1356 (tgt->lut_sync_lock_cancel == SYNC_LOCK_CANCEL_ALWAYS ||
1357 (tgt->lut_sync_lock_cancel == SYNC_LOCK_CANCEL_BLOCKING &&
1358 ldlm_is_cbpending(lock))) &&
1359 ((exp_connect_flags(lock->l_export) & OBD_CONNECT_MDS_MDS) ||
1360 lock->l_resource->lr_type == LDLM_EXTENT)) {
1362 __u64 end = OBD_OBJECT_EOF;
1364 rc = lu_env_init(&env, LCT_DT_THREAD);
1365 if (unlikely(rc != 0))
1368 ost_fid_from_resid(&fid, &lock->l_resource->lr_name,
1369 tgt->lut_lsd.lsd_osd_index);
1371 if (lock->l_resource->lr_type == LDLM_EXTENT) {
1372 obj = dt_locate(&env, tgt->lut_bottom, &fid);
1374 GOTO(err_env, rc = PTR_ERR(obj));
1376 if (!dt_object_exists(obj))
1377 GOTO(err_put, rc = -ENOENT);
1379 start = lock->l_policy_data.l_extent.start;
1380 end = lock->l_policy_data.l_extent.end;
1383 rc = tgt_sync(&env, tgt, obj, start, end);
1385 CERROR("%s: syncing "DFID" (%llu-%llu) on lock "
1386 "cancel: rc = %d\n",
1387 tgt_name(tgt), PFID(&fid),
1388 lock->l_policy_data.l_extent.start,
1389 lock->l_policy_data.l_extent.end, rc);
1393 dt_object_put(&env, obj);
1398 rc = ldlm_server_blocking_ast(lock, desc, data, flag);
1402 static struct ldlm_callback_suite tgt_dlm_cbs = {
1403 .lcs_completion = ldlm_server_completion_ast,
1404 .lcs_blocking = tgt_blocking_ast,
1405 .lcs_glimpse = ldlm_server_glimpse_ast
1408 int tgt_enqueue(struct tgt_session_info *tsi)
1410 struct ptlrpc_request *req = tgt_ses_req(tsi);
1415 * tsi->tsi_dlm_req was already swapped and (if necessary) converted,
1416 * tsi->tsi_dlm_cbs was set by the *_req_handle() function.
1418 LASSERT(tsi->tsi_dlm_req != NULL);
1419 rc = ldlm_handle_enqueue0(tsi->tsi_exp->exp_obd->obd_namespace, req,
1420 tsi->tsi_dlm_req, &tgt_dlm_cbs);
1422 RETURN(err_serious(rc));
1424 switch (LUT_FAIL_CLASS(tsi->tsi_reply_fail_id)) {
1426 tsi->tsi_reply_fail_id = OBD_FAIL_MDS_LDLM_REPLY_NET;
1429 tsi->tsi_reply_fail_id = OBD_FAIL_OST_LDLM_REPLY_NET;
1432 tsi->tsi_reply_fail_id = OBD_FAIL_MGS_LDLM_REPLY_NET;
1435 tsi->tsi_reply_fail_id = OBD_FAIL_LDLM_REPLY;
1438 RETURN(req->rq_status);
1440 EXPORT_SYMBOL(tgt_enqueue);
1442 int tgt_convert(struct tgt_session_info *tsi)
1444 struct ptlrpc_request *req = tgt_ses_req(tsi);
1448 LASSERT(tsi->tsi_dlm_req);
1449 rc = ldlm_handle_convert0(req, tsi->tsi_dlm_req);
1451 RETURN(err_serious(rc));
1453 RETURN(req->rq_status);
1456 int tgt_bl_callback(struct tgt_session_info *tsi)
1458 return err_serious(-EOPNOTSUPP);
1461 int tgt_cp_callback(struct tgt_session_info *tsi)
1463 return err_serious(-EOPNOTSUPP);
1466 /* generic LDLM target handler */
1467 struct tgt_handler tgt_dlm_handlers[] = {
1468 TGT_DLM_HDL(HAS_KEY, LDLM_ENQUEUE, tgt_enqueue),
1469 TGT_DLM_HDL(HAS_KEY, LDLM_CONVERT, tgt_convert),
1470 TGT_DLM_HDL_VAR(0, LDLM_BL_CALLBACK, tgt_bl_callback),
1471 TGT_DLM_HDL_VAR(0, LDLM_CP_CALLBACK, tgt_cp_callback)
1473 EXPORT_SYMBOL(tgt_dlm_handlers);
1476 * Unified target LLOG handlers.
1478 int tgt_llog_open(struct tgt_session_info *tsi)
1484 rc = llog_origin_handle_open(tgt_ses_req(tsi));
1488 EXPORT_SYMBOL(tgt_llog_open);
1490 int tgt_llog_read_header(struct tgt_session_info *tsi)
1496 rc = llog_origin_handle_read_header(tgt_ses_req(tsi));
1500 EXPORT_SYMBOL(tgt_llog_read_header);
1502 int tgt_llog_next_block(struct tgt_session_info *tsi)
1508 rc = llog_origin_handle_next_block(tgt_ses_req(tsi));
1512 EXPORT_SYMBOL(tgt_llog_next_block);
1514 int tgt_llog_prev_block(struct tgt_session_info *tsi)
1520 rc = llog_origin_handle_prev_block(tgt_ses_req(tsi));
1524 EXPORT_SYMBOL(tgt_llog_prev_block);
1526 /* generic llog target handler */
1527 struct tgt_handler tgt_llog_handlers[] = {
1528 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_CREATE, tgt_llog_open),
1529 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_NEXT_BLOCK, tgt_llog_next_block),
1530 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_READ_HEADER, tgt_llog_read_header),
1531 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_PREV_BLOCK, tgt_llog_prev_block),
1533 EXPORT_SYMBOL(tgt_llog_handlers);
1536 * sec context handlers
1538 /* XXX: Implement based on mdt_sec_ctx_handle()? */
1539 static int tgt_sec_ctx_handle(struct tgt_session_info *tsi)
1544 struct tgt_handler tgt_sec_ctx_handlers[] = {
1545 TGT_SEC_HDL_VAR(0, SEC_CTX_INIT, tgt_sec_ctx_handle),
1546 TGT_SEC_HDL_VAR(0, SEC_CTX_INIT_CONT, tgt_sec_ctx_handle),
1547 TGT_SEC_HDL_VAR(0, SEC_CTX_FINI, tgt_sec_ctx_handle),
1549 EXPORT_SYMBOL(tgt_sec_ctx_handlers);
1551 int (*tgt_lfsck_in_notify_local)(const struct lu_env *env,
1552 struct dt_device *key,
1553 struct lfsck_req_local *lrl,
1554 struct thandle *th) = NULL;
1556 void tgt_register_lfsck_in_notify_local(int (*notify)(const struct lu_env *,
1558 struct lfsck_req_local *,
1561 tgt_lfsck_in_notify_local = notify;
1563 EXPORT_SYMBOL(tgt_register_lfsck_in_notify_local);
1565 int (*tgt_lfsck_in_notify)(const struct lu_env *env,
1566 struct dt_device *key,
1567 struct lfsck_request *lr) = NULL;
1569 void tgt_register_lfsck_in_notify(int (*notify)(const struct lu_env *,
1571 struct lfsck_request *))
1573 tgt_lfsck_in_notify = notify;
1575 EXPORT_SYMBOL(tgt_register_lfsck_in_notify);
1577 static int (*tgt_lfsck_query)(const struct lu_env *env,
1578 struct dt_device *key,
1579 struct lfsck_request *req,
1580 struct lfsck_reply *rep,
1581 struct lfsck_query *que) = NULL;
1583 void tgt_register_lfsck_query(int (*query)(const struct lu_env *,
1585 struct lfsck_request *,
1586 struct lfsck_reply *,
1587 struct lfsck_query *))
1589 tgt_lfsck_query = query;
1591 EXPORT_SYMBOL(tgt_register_lfsck_query);
1593 /* LFSCK request handlers */
1594 static int tgt_handle_lfsck_notify(struct tgt_session_info *tsi)
1596 const struct lu_env *env = tsi->tsi_env;
1597 struct dt_device *key = tsi->tsi_tgt->lut_bottom;
1598 struct lfsck_request *lr;
1602 lr = req_capsule_client_get(tsi->tsi_pill, &RMF_LFSCK_REQUEST);
1606 rc = tgt_lfsck_in_notify(env, key, lr);
1611 static int tgt_handle_lfsck_query(struct tgt_session_info *tsi)
1613 struct lfsck_request *request;
1614 struct lfsck_reply *reply;
1618 request = req_capsule_client_get(tsi->tsi_pill, &RMF_LFSCK_REQUEST);
1619 if (request == NULL)
1622 reply = req_capsule_server_get(tsi->tsi_pill, &RMF_LFSCK_REPLY);
1626 rc = tgt_lfsck_query(tsi->tsi_env, tsi->tsi_tgt->lut_bottom,
1627 request, reply, NULL);
1629 RETURN(rc < 0 ? rc : 0);
1632 struct tgt_handler tgt_lfsck_handlers[] = {
1633 TGT_LFSCK_HDL(HAS_REPLY, LFSCK_NOTIFY, tgt_handle_lfsck_notify),
1634 TGT_LFSCK_HDL(HAS_REPLY, LFSCK_QUERY, tgt_handle_lfsck_query),
1636 EXPORT_SYMBOL(tgt_lfsck_handlers);
1639 * initialize per-thread page pool (bug 5137).
1641 int tgt_io_thread_init(struct ptlrpc_thread *thread)
1643 struct tgt_thread_big_cache *tbc;
1647 LASSERT(thread != NULL);
1648 LASSERT(thread->t_data == NULL);
1650 OBD_ALLOC_LARGE(tbc, sizeof(*tbc));
1653 thread->t_data = tbc;
1656 EXPORT_SYMBOL(tgt_io_thread_init);
1659 * free per-thread pool created by tgt_thread_init().
1661 void tgt_io_thread_done(struct ptlrpc_thread *thread)
1663 struct tgt_thread_big_cache *tbc;
1667 LASSERT(thread != NULL);
1670 * be prepared to handle partially-initialized pools (because this is
1671 * called from ost_io_thread_init() for cleanup.
1673 tbc = thread->t_data;
1675 OBD_FREE_LARGE(tbc, sizeof(*tbc));
1676 thread->t_data = NULL;
1680 EXPORT_SYMBOL(tgt_io_thread_done);
1683 * Helper function for getting Data-on-MDT file server DLM lock
1684 * if asked by client.
1686 int tgt_mdt_data_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
1687 struct lustre_handle *lh, int mode, __u64 *flags)
1689 union ldlm_policy_data policy = {
1690 .l_inodebits.bits = MDS_INODELOCK_DOM,
1696 LASSERT(lh != NULL);
1697 LASSERT(ns != NULL);
1698 LASSERT(!lustre_handle_is_used(lh));
1700 rc = ldlm_cli_enqueue_local(NULL, ns, res_id, LDLM_IBITS, &policy, mode,
1701 flags, ldlm_blocking_ast,
1702 ldlm_completion_ast, ldlm_glimpse_ast,
1703 NULL, 0, LVB_T_NONE, NULL, lh);
1705 RETURN(rc == ELDLM_OK ? 0 : -EIO);
1707 EXPORT_SYMBOL(tgt_mdt_data_lock);
1710 * Helper function for getting server side [start, start+count] DLM lock
1711 * if asked by client.
1713 int tgt_extent_lock(const struct lu_env *env, struct ldlm_namespace *ns,
1714 struct ldlm_res_id *res_id, __u64 start, __u64 end,
1715 struct lustre_handle *lh, int mode, __u64 *flags)
1717 union ldlm_policy_data policy;
1722 LASSERT(lh != NULL);
1723 LASSERT(ns != NULL);
1724 LASSERT(!lustre_handle_is_used(lh));
1726 policy.l_extent.gid = 0;
1727 policy.l_extent.start = start & PAGE_MASK;
1730 * If ->o_blocks is EOF it means "lock till the end of the file".
1731 * Otherwise, it's size of an extent or hole being punched (in bytes).
1733 if (end == OBD_OBJECT_EOF || end < start)
1734 policy.l_extent.end = OBD_OBJECT_EOF;
1736 policy.l_extent.end = end | ~PAGE_MASK;
1738 rc = ldlm_cli_enqueue_local(env, ns, res_id, LDLM_EXTENT, &policy,
1739 mode, flags, ldlm_blocking_ast,
1740 ldlm_completion_ast, ldlm_glimpse_ast,
1741 NULL, 0, LVB_T_NONE, NULL, lh);
1742 RETURN(rc == ELDLM_OK ? 0 : -EIO);
1744 EXPORT_SYMBOL(tgt_extent_lock);
1746 static int tgt_data_lock(const struct lu_env *env, struct obd_export *exp,
1747 struct ldlm_res_id *res_id, __u64 start, __u64 end,
1748 struct lustre_handle *lh, enum ldlm_mode mode)
1750 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
1753 /* MDT IO for data-on-mdt */
1754 if (exp->exp_connect_data.ocd_connect_flags & OBD_CONNECT_IBITS)
1755 return tgt_mdt_data_lock(ns, res_id, lh, mode, &flags);
1757 return tgt_extent_lock(env, ns, res_id, start, end, lh, mode, &flags);
1760 void tgt_data_unlock(struct lustre_handle *lh, enum ldlm_mode mode)
1762 LASSERT(lustre_handle_is_used(lh));
1763 ldlm_lock_decref(lh, mode);
1765 EXPORT_SYMBOL(tgt_data_unlock);
1767 static int tgt_brw_lock(const struct lu_env *env, struct obd_export *exp,
1768 struct ldlm_res_id *res_id, struct obd_ioobj *obj,
1769 struct niobuf_remote *nb, struct lustre_handle *lh,
1770 enum ldlm_mode mode)
1772 int nrbufs = obj->ioo_bufcnt;
1777 LASSERT(mode == LCK_PR || mode == LCK_PW);
1778 LASSERT(!lustre_handle_is_used(lh));
1780 if (exp->exp_obd->obd_recovering)
1783 if (nrbufs == 0 || !(nb[0].rnb_flags & OBD_BRW_SRVLOCK))
1786 for (i = 1; i < nrbufs; i++)
1787 if (!(nb[i].rnb_flags & OBD_BRW_SRVLOCK))
1790 return tgt_data_lock(env, exp, res_id, nb[0].rnb_offset,
1791 nb[nrbufs - 1].rnb_offset +
1792 nb[nrbufs - 1].rnb_len - 1, lh, mode);
1795 static void tgt_brw_unlock(struct obd_export *exp, struct obd_ioobj *obj,
1796 struct niobuf_remote *niob,
1797 struct lustre_handle *lh, enum ldlm_mode mode)
1801 LASSERT(mode == LCK_PR || mode == LCK_PW);
1802 LASSERT((!exp->exp_obd->obd_recovering && obj->ioo_bufcnt &&
1803 niob[0].rnb_flags & OBD_BRW_SRVLOCK) ==
1804 lustre_handle_is_used(lh));
1806 if (lustre_handle_is_used(lh))
1807 tgt_data_unlock(lh, mode);
1811 static int tgt_checksum_niobuf(struct lu_target *tgt,
1812 struct niobuf_local *local_nb, int npages,
1813 int opc, enum cksum_types cksum_type,
1816 struct ahash_request *req;
1817 unsigned int bufsize;
1819 unsigned char cfs_alg = cksum_obd2cfs(cksum_type);
1821 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1823 CERROR("%s: unable to initialize checksum hash %s\n",
1824 tgt_name(tgt), cfs_crypto_hash_name(cfs_alg));
1825 return PTR_ERR(req);
1828 CDEBUG(D_INFO, "Checksum for algo %s\n", cfs_crypto_hash_name(cfs_alg));
1829 for (i = 0; i < npages; i++) {
1830 /* corrupt the data before we compute the checksum, to
1831 * simulate a client->OST data error */
1832 if (i == 0 && opc == OST_WRITE &&
1833 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) {
1834 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
1835 int len = local_nb[i].lnb_len;
1836 struct page *np = tgt_page_to_corrupt;
1839 char *ptr = kmap_atomic(local_nb[i].lnb_page);
1840 char *ptr2 = page_address(np);
1842 memcpy(ptr2 + off, ptr + off, len);
1843 memcpy(ptr2 + off, "bad3", min(4, len));
1846 /* LU-8376 to preserve original index for
1847 * display in dump_all_bulk_pages() */
1850 cfs_crypto_hash_update_page(req, np, off,
1854 CERROR("%s: can't alloc page for corruption\n",
1858 cfs_crypto_hash_update_page(req, local_nb[i].lnb_page,
1859 local_nb[i].lnb_page_offset & ~PAGE_MASK,
1860 local_nb[i].lnb_len);
1862 /* corrupt the data after we compute the checksum, to
1863 * simulate an OST->client data error */
1864 if (i == 0 && opc == OST_READ &&
1865 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND)) {
1866 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
1867 int len = local_nb[i].lnb_len;
1868 struct page *np = tgt_page_to_corrupt;
1871 char *ptr = kmap_atomic(local_nb[i].lnb_page);
1872 char *ptr2 = page_address(np);
1874 memcpy(ptr2 + off, ptr + off, len);
1875 memcpy(ptr2 + off, "bad4", min(4, len));
1878 /* LU-8376 to preserve original index for
1879 * display in dump_all_bulk_pages() */
1882 cfs_crypto_hash_update_page(req, np, off,
1886 CERROR("%s: can't alloc page for corruption\n",
1892 bufsize = sizeof(*cksum);
1893 err = cfs_crypto_hash_final(req, (unsigned char *)cksum, &bufsize);
1898 char dbgcksum_file_name[PATH_MAX];
1900 static void dump_all_bulk_pages(struct obdo *oa, int count,
1901 struct niobuf_local *local_nb,
1902 __u32 server_cksum, __u32 client_cksum)
1909 /* will only keep dump of pages on first error for the same range in
1910 * file/fid, not during the resends/retries. */
1911 snprintf(dbgcksum_file_name, sizeof(dbgcksum_file_name),
1912 "%s-checksum_dump-ost-"DFID":[%llu-%llu]-%x-%x",
1913 (strncmp(libcfs_debug_file_path, "NONE", 4) != 0 ?
1914 libcfs_debug_file_path : LIBCFS_DEBUG_FILE_PATH_DEFAULT),
1915 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1916 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1917 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1918 local_nb[0].lnb_file_offset,
1919 local_nb[count-1].lnb_file_offset +
1920 local_nb[count-1].lnb_len - 1, client_cksum, server_cksum);
1921 CWARN("dumping checksum data to %s\n", dbgcksum_file_name);
1922 filp = filp_open(dbgcksum_file_name,
1923 O_CREAT | O_EXCL | O_WRONLY | O_LARGEFILE, 0600);
1927 CDEBUG(D_INFO, "%s: can't open to dump pages with "
1928 "checksum error: rc = %d\n", dbgcksum_file_name,
1931 CERROR("%s: can't open to dump pages with checksum "
1932 "error: rc = %d\n", dbgcksum_file_name, rc);
1936 for (i = 0; i < count; i++) {
1937 len = local_nb[i].lnb_len;
1938 buf = kmap(local_nb[i].lnb_page);
1940 rc = cfs_kernel_write(filp, buf, len, &filp->f_pos);
1942 CERROR("%s: wanted to write %u but got %d "
1943 "error\n", dbgcksum_file_name, len, rc);
1949 kunmap(local_nb[i].lnb_page);
1952 rc = vfs_fsync_range(filp, 0, LLONG_MAX, 1);
1954 CERROR("%s: sync returns %d\n", dbgcksum_file_name, rc);
1955 filp_close(filp, NULL);
1957 libcfs_debug_dumplog();
1960 static int check_read_checksum(struct niobuf_local *local_nb, int npages,
1961 struct obd_export *exp, struct obdo *oa,
1962 const struct lnet_process_id *peer,
1963 __u32 client_cksum, __u32 server_cksum,
1964 enum cksum_types server_cksum_type)
1967 enum cksum_types cksum_type;
1970 if (unlikely(npages <= 0))
1973 /* unlikely to happen and only if resend does not occur due to cksum
1974 * control failure on Client */
1975 if (unlikely(server_cksum == client_cksum)) {
1976 CDEBUG(D_PAGE, "checksum %x confirmed upon retry\n",
1981 if (exp->exp_obd->obd_checksum_dump)
1982 dump_all_bulk_pages(oa, npages, local_nb, server_cksum,
1985 cksum_type = obd_cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1988 if (cksum_type != server_cksum_type)
1989 msg = "the server may have not used the checksum type specified"
1990 " in the original request - likely a protocol problem";
1992 msg = "should have changed on the client or in transit";
1994 start = local_nb[0].lnb_file_offset;
1995 end = local_nb[npages-1].lnb_file_offset +
1996 local_nb[npages-1].lnb_len - 1;
1998 LCONSOLE_ERROR_MSG(0x132, "%s: BAD READ CHECKSUM: %s: from %s inode "
1999 DFID " object "DOSTID" extent [%llu-%llu], client returned csum"
2000 " %x (type %x), server csum %x (type %x)\n",
2001 exp->exp_obd->obd_name,
2002 msg, libcfs_nid2str(peer->nid),
2003 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : 0ULL,
2004 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
2005 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
2007 start, end, client_cksum, cksum_type, server_cksum,
2013 static int tgt_pages2shortio(struct niobuf_local *local, int npages,
2014 unsigned char *buf, int size)
2016 int i, off, len, copied = size;
2019 for (i = 0; i < npages; i++) {
2020 off = local[i].lnb_page_offset & ~PAGE_MASK;
2021 len = local[i].lnb_len;
2023 CDEBUG(D_PAGE, "index %d offset = %d len = %d left = %d\n",
2028 ptr = kmap_atomic(local[i].lnb_page);
2029 memcpy(buf, ptr + off, len);
2034 return copied - size;
2037 static int tgt_checksum_niobuf_t10pi(struct lu_target *tgt,
2038 struct niobuf_local *local_nb, int npages,
2039 int opc, obd_dif_csum_fn *fn,
2040 int sector_size, u32 *check_sum,
2043 enum cksum_types t10_cksum_type = tgt->lut_dt_conf.ddp_t10_cksum_type;
2044 unsigned char cfs_alg = cksum_obd2cfs(OBD_CKSUM_T10_TOP);
2045 const char *obd_name = tgt->lut_obd->obd_name;
2046 struct ahash_request *req;
2047 unsigned int bufsize;
2048 unsigned char *buffer;
2049 struct page *__page;
2052 int used_number = 0;
2058 __page = alloc_page(GFP_KERNEL);
2062 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
2065 CERROR("%s: unable to initialize checksum hash %s: rc = %d\n",
2066 tgt_name(tgt), cfs_crypto_hash_name(cfs_alg), rc);
2070 buffer = kmap(__page);
2071 guard_start = (__u16 *)buffer;
2072 guard_number = PAGE_SIZE / sizeof(*guard_start);
2073 if (unlikely(resend))
2074 CDEBUG(D_PAGE | D_HA, "GRD tags per page = %u\n", guard_number);
2075 for (i = 0; i < npages; i++) {
2078 /* corrupt the data before we compute the checksum, to
2079 * simulate a client->OST data error */
2080 if (i == 0 && opc == OST_WRITE &&
2081 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) {
2082 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
2083 int len = local_nb[i].lnb_len;
2084 struct page *np = tgt_page_to_corrupt;
2087 char *ptr = kmap_atomic(local_nb[i].lnb_page);
2088 char *ptr2 = page_address(np);
2090 memcpy(ptr2 + off, ptr + off, len);
2091 memcpy(ptr2 + off, "bad3", min(4, len));
2094 /* LU-8376 to preserve original index for
2095 * display in dump_all_bulk_pages() */
2098 cfs_crypto_hash_update_page(req, np, off,
2102 CERROR("%s: can't alloc page for corruption\n",
2108 * The left guard number should be able to hold checksums of a
2111 use_t10_grd = t10_cksum_type && opc == OST_READ &&
2112 local_nb[i].lnb_len == PAGE_SIZE &&
2113 local_nb[i].lnb_guard_disk;
2115 used = DIV_ROUND_UP(local_nb[i].lnb_len, sector_size);
2116 if (used > (guard_number - used_number)) {
2120 memcpy(guard_start + used_number,
2121 local_nb[i].lnb_guards,
2122 used * sizeof(*guard_start));
2123 if (unlikely(resend))
2124 CDEBUG(D_PAGE | D_HA,
2125 "lnb[%u]: used %u off %u+%u lnb checksum: %*phN\n",
2127 local_nb[i].lnb_page_offset,
2128 local_nb[i].lnb_len,
2129 (int)(used * sizeof(*guard_start)),
2130 guard_start + used_number);
2132 if (!use_t10_grd || unlikely(resend)) {
2133 __u16 guard_tmp[MAX_GUARD_NUMBER];
2134 __u16 *guards = guard_start + used_number;
2135 int used_tmp = -1, *usedp = &used;
2137 if (unlikely(use_t10_grd)) {
2141 rc = obd_page_dif_generate_buffer(obd_name,
2142 local_nb[i].lnb_page,
2143 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2144 local_nb[i].lnb_len, guards,
2145 guard_number - used_number, usedp, sector_size,
2147 if (unlikely(resend)) {
2148 bool bad = use_t10_grd &&
2150 local_nb[i].lnb_guards,
2151 used_tmp * sizeof(*guard_tmp));
2154 CERROR("lnb[%u]: used %u/%u off %u+%u tmp checksum: %*phN\n",
2156 local_nb[i].lnb_page_offset,
2157 local_nb[i].lnb_len,
2158 (int)(used_tmp * sizeof(*guard_start)),
2160 CDEBUG_LIMIT(D_PAGE | D_HA | (bad ? D_ERROR : 0),
2161 "lnb[%u]: used %u/%u off %u+%u gen checksum: %*phN\n",
2163 local_nb[i].lnb_page_offset,
2164 local_nb[i].lnb_len,
2165 (int)(used * sizeof(*guard_start)),
2166 guard_start + used_number);
2172 LASSERT(used <= MAX_GUARD_NUMBER);
2174 * If disk support T10PI checksum, copy guards to local_nb.
2175 * If the write is partial page, do not use the guards for bio
2176 * submission since the data might not be full-sector. The bio
2177 * guards will be generated later based on the full sectors. If
2178 * the sector size is 512B rather than 4 KB, or the page size
2179 * is larger than 4KB, this might drop some useful guards for
2180 * partial page write, but it will only add minimal extra time
2181 * of checksum calculation.
2183 if (t10_cksum_type && opc == OST_WRITE &&
2184 local_nb[i].lnb_len == PAGE_SIZE) {
2185 local_nb[i].lnb_guard_rpc = 1;
2186 memcpy(local_nb[i].lnb_guards,
2187 guard_start + used_number,
2188 used * sizeof(*local_nb[i].lnb_guards));
2191 used_number += used;
2192 if (used_number == guard_number) {
2193 cfs_crypto_hash_update_page(req, __page, 0,
2194 used_number * sizeof(*guard_start));
2198 /* corrupt the data after we compute the checksum, to
2199 * simulate an OST->client data error */
2200 if (unlikely(i == 0 && opc == OST_READ &&
2201 OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND))) {
2202 int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
2203 int len = local_nb[i].lnb_len;
2204 struct page *np = tgt_page_to_corrupt;
2207 char *ptr = kmap_atomic(local_nb[i].lnb_page);
2208 char *ptr2 = page_address(np);
2210 memcpy(ptr2 + off, ptr + off, len);
2211 memcpy(ptr2 + off, "bad4", min(4, len));
2214 /* LU-8376 to preserve original index for
2215 * display in dump_all_bulk_pages() */
2218 cfs_crypto_hash_update_page(req, np, off,
2222 CERROR("%s: can't alloc page for corruption\n",
2231 if (used_number != 0)
2232 cfs_crypto_hash_update_page(req, __page, 0,
2233 used_number * sizeof(*guard_start));
2235 bufsize = sizeof(cksum);
2236 rc = cfs_crypto_hash_final(req, (unsigned char *)&cksum, &bufsize);
2241 __free_page(__page);
2245 static int tgt_checksum_niobuf_rw(struct lu_target *tgt,
2246 enum cksum_types cksum_type,
2247 struct niobuf_local *local_nb,
2248 int npages, int opc, u32 *check_sum,
2251 obd_dif_csum_fn *fn = NULL;
2252 int sector_size = 0;
2256 obd_t10_cksum2dif(cksum_type, &fn, §or_size);
2259 rc = tgt_checksum_niobuf_t10pi(tgt, local_nb, npages,
2260 opc, fn, sector_size,
2263 rc = tgt_checksum_niobuf(tgt, local_nb, npages, opc,
2264 cksum_type, check_sum);
2269 int tgt_brw_read(struct tgt_session_info *tsi)
2271 struct ptlrpc_request *req = tgt_ses_req(tsi);
2272 struct ptlrpc_bulk_desc *desc = NULL;
2273 struct obd_export *exp = tsi->tsi_exp;
2274 struct niobuf_remote *remote_nb;
2275 struct niobuf_local *local_nb;
2276 struct obd_ioobj *ioo;
2277 struct ost_body *body, *repbody;
2278 struct lustre_handle lockh = { 0 };
2279 int npages, nob = 0, rc, i, no_reply = 0,
2281 struct tgt_thread_big_cache *tbc = req->rq_svc_thread->t_data;
2282 const char *obd_name = exp->exp_obd->obd_name;
2287 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL &&
2288 ptlrpc_req2svc(req)->srv_req_portal != MDS_IO_PORTAL) {
2289 CERROR("%s: deny read request from %s to portal %u\n",
2290 tgt_name(tsi->tsi_tgt),
2291 obd_export_nid2str(req->rq_export),
2292 ptlrpc_req2svc(req)->srv_req_portal);
2296 req->rq_bulk_read = 1;
2298 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_READ_BULK)) {
2299 /* optionally use cfs_fail_val - 1 to select a specific OST on
2300 * this server to fail requests.
2302 char fail_ost_name[MAX_OBD_NAME];
2304 if (cfs_fail_val > 0) {
2305 snprintf(fail_ost_name, MAX_OBD_NAME, "OST%04X",
2308 if (strstr(obd_name, fail_ost_name))
2309 RETURN(err_serious(-EIO));
2311 RETURN(err_serious(-EIO));
2315 OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, cfs_fail_val > 0 ?
2316 cfs_fail_val : (obd_timeout + 1) / 4);
2318 /* Check if there is eviction in progress, and if so, wait for it to
2320 if (unlikely(atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
2321 /* We do not care how long it takes */
2323 exp->exp_obd->obd_evict_inprogress_waitq,
2324 !atomic_read(&exp->exp_obd->obd_evict_inprogress));
2327 /* There must be big cache in current thread to process this request
2328 * if it is NULL then something went wrong and it wasn't allocated,
2329 * report -ENOMEM in that case */
2333 body = tsi->tsi_ost_body;
2334 LASSERT(body != NULL);
2336 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2337 body->oa.o_flags & OBD_FL_NORPC)
2340 ioo = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_IOOBJ);
2341 LASSERT(ioo != NULL); /* must exists after tgt_ost_body_unpack */
2343 remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
2344 LASSERT(remote_nb != NULL); /* must exists after tgt_ost_body_unpack */
2346 local_nb = tbc->local;
2348 rc = tgt_brw_lock(tsi->tsi_env, exp, &tsi->tsi_resid, ioo, remote_nb,
2354 * If getting the lock took more time than
2355 * client was willing to wait, drop it. b=11330
2357 if (ktime_get_real_seconds() > req->rq_deadline ||
2358 OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
2360 CERROR("Dropping timed-out read from %s because locking object " DOSTID " took %lld seconds (limit was %lld).\n",
2361 libcfs_id2str(req->rq_peer), POSTID(&ioo->ioo_oid),
2362 ktime_get_real_seconds() - req->rq_arrival_time.tv_sec,
2363 req->rq_deadline - req->rq_arrival_time.tv_sec);
2364 GOTO(out_lock, rc = -ETIMEDOUT);
2368 * Because we already sync grant info with client when
2369 * reconnect, grant info will be cleared for resent req,
2370 * otherwise, outdated grant count in the rpc would de-sync
2371 * grant counters in case of shrink
2373 if (lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY)) {
2374 DEBUG_REQ(D_CACHE, req, "clear resent/replay req grant info");
2375 body->oa.o_valid &= ~OBD_MD_FLGRANT;
2378 repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
2379 repbody->oa = body->oa;
2381 npages = PTLRPC_MAX_BRW_PAGES;
2382 kstart = ktime_get();
2383 rc = obd_preprw(tsi->tsi_env, OBD_BRW_READ, exp, &repbody->oa, 1,
2384 ioo, remote_nb, &npages, local_nb);
2388 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2389 body->oa.o_flags & OBD_FL_SHORT_IO) {
2392 desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
2393 PTLRPC_BULK_PUT_SOURCE,
2395 &ptlrpc_bulk_kiov_nopin_ops);
2397 GOTO(out_commitrw, rc = -ENOMEM);
2400 npages_read = npages;
2401 for (i = 0; i < npages; i++) {
2402 int page_rc = local_nb[i].lnb_rc;
2411 if (page_rc != 0 && desc != NULL) { /* some data! */
2412 LASSERT(local_nb[i].lnb_page != NULL);
2413 desc->bd_frag_ops->add_kiov_frag
2414 (desc, local_nb[i].lnb_page,
2415 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2419 if (page_rc != local_nb[i].lnb_len) { /* short read */
2420 local_nb[i].lnb_len = page_rc;
2421 npages_read = i + (page_rc != 0 ? 1 : 0);
2422 /* All subsequent pages should be 0 */
2423 while (++i < npages)
2424 LASSERT(local_nb[i].lnb_rc == 0);
2429 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
2430 u32 flag = body->oa.o_valid & OBD_MD_FLFLAGS ?
2431 body->oa.o_flags : 0;
2432 enum cksum_types cksum_type = obd_cksum_type_unpack(flag);
2433 bool resend = (body->oa.o_valid & OBD_MD_FLFLAGS) &&
2434 (body->oa.o_flags & OBD_FL_RECOV_RESEND);
2436 repbody->oa.o_flags = obd_cksum_type_pack(obd_name,
2438 repbody->oa.o_valid = OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
2440 rc = tgt_checksum_niobuf_rw(tsi->tsi_tgt, cksum_type,
2441 local_nb, npages_read, OST_READ,
2442 &repbody->oa.o_cksum, resend);
2444 GOTO(out_commitrw, rc);
2445 CDEBUG(D_PAGE | (resend ? D_HA : 0),
2446 "checksum at read origin: %x (%x)\n",
2447 repbody->oa.o_cksum, cksum_type);
2449 /* if a resend it could be for a cksum error, so check Server
2450 * cksum with returned Client cksum (this should even cover
2451 * zero-cksum case) */
2453 check_read_checksum(local_nb, npages_read, exp,
2454 &body->oa, &req->rq_peer,
2456 repbody->oa.o_cksum, cksum_type);
2458 repbody->oa.o_valid = 0;
2460 if (body->oa.o_valid & OBD_MD_FLGRANT)
2461 repbody->oa.o_valid |= OBD_MD_FLGRANT;
2462 /* We're finishing using body->oa as an input variable */
2464 /* Check if client was evicted while we were doing i/o before touching
2467 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2468 body->oa.o_flags & OBD_FL_SHORT_IO) {
2469 unsigned char *short_io_buf;
2472 short_io_buf = req_capsule_server_get(&req->rq_pill,
2474 short_io_size = req_capsule_get_size(&req->rq_pill,
2477 rc = tgt_pages2shortio(local_nb, npages_read,
2478 short_io_buf, short_io_size);
2480 req_capsule_shrink(&req->rq_pill,
2483 rc = rc > 0 ? 0 : rc;
2484 } else if (!CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)) {
2485 rc = target_bulk_io(exp, desc);
2489 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2490 body->oa.o_flags & OBD_FL_SHORT_IO)
2491 req_capsule_shrink(&req->rq_pill, &RMF_SHORT_IO, 0,
2496 /* Must commit after prep above in all cases */
2497 rc = obd_commitrw(tsi->tsi_env, OBD_BRW_READ, exp, &repbody->oa, 1, ioo,
2498 remote_nb, npages, local_nb, rc, nob, kstart);
2500 tgt_brw_unlock(exp, ioo, remote_nb, &lockh, LCK_PR);
2502 if (desc && !CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2))
2503 ptlrpc_free_bulk(desc);
2508 ptlrpc_lprocfs_brw(req, nob);
2509 } else if (no_reply) {
2510 req->rq_no_reply = 1;
2511 /* reply out callback would free */
2512 ptlrpc_req_drop_rs(req);
2513 LCONSOLE_WARN("%s: Bulk IO read error with %s (at %s), "
2514 "client will retry: rc %d\n",
2516 obd_uuid2str(&exp->exp_client_uuid),
2517 obd_export_nid2str(exp), rc);
2519 /* send a bulk after reply to simulate a network delay or reordering
2520 * by a router - Note that !desc implies short io, so there is no bulk
2522 if (unlikely(CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)) &&
2524 /* Calculate checksum before request transfer, original
2525 * it is done by target_bulk_io() */
2526 rc = sptlrpc_svc_wrap_bulk(req, desc);
2527 if (OCD_HAS_FLAG(&exp->exp_connect_data, BULK_MBITS))
2528 req->rq_mbits = lustre_msg_get_mbits(req->rq_reqmsg);
2529 else /* old version, bulk matchbits is rq_xid */
2530 req->rq_mbits = req->rq_xid;
2532 req->rq_status = rc;
2533 target_committed_to_req(req);
2534 target_send_reply(req, 0, 0);
2536 CDEBUG(D_INFO, "reorder BULK\n");
2537 OBD_FAIL_TIMEOUT(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2,
2538 cfs_fail_val ? : 3);
2540 target_bulk_io(exp, desc);
2541 ptlrpc_free_bulk(desc);
2546 EXPORT_SYMBOL(tgt_brw_read);
2548 static int tgt_shortio2pages(struct niobuf_local *local, int npages,
2549 unsigned char *buf, unsigned int size)
2554 for (i = 0; i < npages; i++) {
2555 off = local[i].lnb_page_offset & ~PAGE_MASK;
2556 len = local[i].lnb_len;
2561 CDEBUG(D_PAGE, "index %d offset = %d len = %d left = %d\n",
2563 ptr = kmap_atomic(local[i].lnb_page);
2566 memcpy(ptr + off, buf, len < size ? len : size);
2574 static void tgt_warn_on_cksum(struct ptlrpc_request *req,
2575 struct ptlrpc_bulk_desc *desc,
2576 struct niobuf_local *local_nb, int npages,
2577 u32 client_cksum, u32 server_cksum,
2580 struct obd_export *exp = req->rq_export;
2581 struct ost_body *body;
2585 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2586 LASSERT(body != NULL);
2588 if (desc && req->rq_peer.nid != desc->bd_sender) {
2590 router = libcfs_nid2str(desc->bd_sender);
2593 if (exp->exp_obd->obd_checksum_dump)
2594 dump_all_bulk_pages(&body->oa, npages, local_nb, server_cksum,
2598 CDEBUG_LIMIT(D_INFO, "client csum %x, server csum %x\n",
2599 client_cksum, server_cksum);
2603 LCONSOLE_ERROR_MSG(0x168, "%s: BAD WRITE CHECKSUM: from %s%s%s inode "
2604 DFID" object "DOSTID" extent [%llu-%llu"
2605 "]: client csum %x, server csum %x\n",
2606 exp->exp_obd->obd_name, libcfs_id2str(req->rq_peer),
2608 body->oa.o_valid & OBD_MD_FLFID ?
2609 body->oa.o_parent_seq : (__u64)0,
2610 body->oa.o_valid & OBD_MD_FLFID ?
2611 body->oa.o_parent_oid : 0,
2612 body->oa.o_valid & OBD_MD_FLFID ?
2613 body->oa.o_parent_ver : 0,
2614 POSTID(&body->oa.o_oi),
2615 local_nb[0].lnb_file_offset,
2616 local_nb[npages-1].lnb_file_offset +
2617 local_nb[npages - 1].lnb_len - 1,
2618 client_cksum, server_cksum);
2621 int tgt_brw_write(struct tgt_session_info *tsi)
2623 struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
2624 struct ptlrpc_request *req = tgt_ses_req(tsi);
2625 struct ptlrpc_bulk_desc *desc = NULL;
2626 struct obd_export *exp = req->rq_export;
2627 struct niobuf_remote *remote_nb;
2628 struct niobuf_local *local_nb;
2629 struct obd_ioobj *ioo;
2630 struct ost_body *body, *repbody;
2631 struct lustre_handle lockh = {0};
2633 int objcount, niocount, npages;
2636 enum cksum_types cksum_type = OBD_CKSUM_CRC32;
2637 bool no_reply = false, mmap;
2638 struct tgt_thread_big_cache *tbc = req->rq_svc_thread->t_data;
2639 bool wait_sync = false;
2640 const char *obd_name = exp->exp_obd->obd_name;
2641 /* '1' for consistency with code that checks !mpflag to restore */
2642 unsigned int mpflags = 1;
2648 if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL &&
2649 ptlrpc_req2svc(req)->srv_req_portal != MDS_IO_PORTAL) {
2650 CERROR("%s: deny write request from %s to portal %u\n",
2651 tgt_name(tsi->tsi_tgt),
2652 obd_export_nid2str(req->rq_export),
2653 ptlrpc_req2svc(req)->srv_req_portal);
2654 RETURN(err_serious(-EPROTO));
2657 if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOSPC))
2658 RETURN(err_serious(-ENOSPC));
2659 if (OBD_FAIL_TIMEOUT(OBD_FAIL_OST_EROFS, 1))
2660 RETURN(err_serious(-EROFS));
2662 req->rq_bulk_write = 1;
2664 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
2666 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK2))
2669 /* optionally use cfs_fail_val - 1 to select a specific OST on
2670 * this server to fail requests.
2672 char fail_ost_name[MAX_OBD_NAME];
2674 if (cfs_fail_val > 0) {
2675 snprintf(fail_ost_name, MAX_OBD_NAME, "OST%04X",
2678 if (strstr(obd_name, fail_ost_name))
2679 RETURN(err_serious(rc));
2681 RETURN(err_serious(rc));
2685 /* pause before transaction has been started */
2686 CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, cfs_fail_val > 0 ?
2687 cfs_fail_val : (obd_timeout + 1) / 4);
2689 /* Delay write commit to show stale size information */
2690 CFS_FAIL_TIMEOUT(OBD_FAIL_OSC_NO_SIZE_DATA, cfs_fail_val);
2692 /* There must be big cache in current thread to process this request
2693 * if it is NULL then something went wrong and it wasn't allocated,
2694 * report -ENOMEM in that case */
2698 body = tsi->tsi_ost_body;
2699 LASSERT(body != NULL);
2701 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2702 body->oa.o_flags & OBD_FL_NORPC)
2706 ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
2707 LASSERT(ioo != NULL); /* must exists after tgt_ost_body_unpack */
2709 objcount = req_capsule_get_size(&req->rq_pill, &RMF_OBD_IOOBJ,
2710 RCL_CLIENT) / sizeof(*ioo);
2712 for (niocount = i = 0; i < objcount; i++)
2713 niocount += ioo[i].ioo_bufcnt;
2715 remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
2716 LASSERT(remote_nb != NULL); /* must exists after tgt_ost_body_unpack */
2717 if (niocount != req_capsule_get_size(&req->rq_pill,
2718 &RMF_NIOBUF_REMOTE, RCL_CLIENT) /
2720 RETURN(err_serious(-EPROTO));
2722 if ((remote_nb[0].rnb_flags & OBD_BRW_MEMALLOC) &&
2723 ptlrpc_connection_is_local(exp->exp_connection))
2724 mpflags = memalloc_noreclaim_save();
2726 req_capsule_set_size(&req->rq_pill, &RMF_RCS, RCL_SERVER,
2727 niocount * sizeof(*rcs));
2728 rc = req_capsule_server_pack(&req->rq_pill);
2730 GOTO(out, rc = err_serious(rc));
2732 CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_PACK, cfs_fail_val);
2733 rcs = req_capsule_server_get(&req->rq_pill, &RMF_RCS);
2735 local_nb = tbc->local;
2737 rc = tgt_brw_lock(tsi->tsi_env, exp, &tsi->tsi_resid, ioo, remote_nb,
2743 * If getting the lock took more time than
2744 * client was willing to wait, drop it. b=11330
2746 if (ktime_get_real_seconds() > req->rq_deadline ||
2747 OBD_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
2749 CERROR("%s: Dropping timed-out write from %s because locking object " DOSTID " took %lld seconds (limit was %lld).\n",
2750 tgt_name(tsi->tsi_tgt), libcfs_id2str(req->rq_peer),
2751 POSTID(&ioo->ioo_oid),
2752 ktime_get_real_seconds() - req->rq_arrival_time.tv_sec,
2753 req->rq_deadline - req->rq_arrival_time.tv_sec);
2754 GOTO(out_lock, rc = -ETIMEDOUT);
2757 /* Because we already sync grant info with client when reconnect,
2758 * grant info will be cleared for resent req, then fed_grant and
2759 * total_grant will not be modified in following preprw_write */
2760 if (lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY)) {
2761 DEBUG_REQ(D_CACHE, req, "clear resent/replay req grant info");
2762 body->oa.o_valid &= ~OBD_MD_FLGRANT;
2765 repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
2766 if (repbody == NULL)
2767 GOTO(out_lock, rc = -ENOMEM);
2768 repbody->oa = body->oa;
2770 npages = PTLRPC_MAX_BRW_PAGES;
2771 kstart = ktime_get();
2772 rc = obd_preprw(tsi->tsi_env, OBD_BRW_WRITE, exp, &repbody->oa,
2773 objcount, ioo, remote_nb, &npages, local_nb);
2776 if (body->oa.o_valid & OBD_MD_FLFLAGS &&
2777 body->oa.o_flags & OBD_FL_SHORT_IO) {
2778 unsigned int short_io_size;
2779 unsigned char *short_io_buf;
2781 short_io_size = req_capsule_get_size(&req->rq_pill,
2784 short_io_buf = req_capsule_client_get(&req->rq_pill,
2786 CDEBUG(D_INFO, "Client use short io for data transfer,"
2787 " size = %d\n", short_io_size);
2789 /* Copy short io buf to pages */
2790 rc = tgt_shortio2pages(local_nb, npages, short_io_buf,
2794 desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
2795 PTLRPC_BULK_GET_SINK,
2797 &ptlrpc_bulk_kiov_nopin_ops);
2799 GOTO(skip_transfer, rc = -ENOMEM);
2801 /* NB Having prepped, we must commit... */
2802 for (i = 0; i < npages; i++)
2803 desc->bd_frag_ops->add_kiov_frag(desc,
2804 local_nb[i].lnb_page,
2805 local_nb[i].lnb_page_offset & ~PAGE_MASK,
2806 local_nb[i].lnb_len);
2808 rc = sptlrpc_svc_prep_bulk(req, desc);
2810 GOTO(skip_transfer, rc);
2812 rc = target_bulk_io(exp, desc);
2818 if (body->oa.o_valid & OBD_MD_FLCKSUM && rc == 0) {
2819 static int cksum_counter;
2821 if (body->oa.o_valid & OBD_MD_FLFLAGS)
2822 cksum_type = obd_cksum_type_unpack(body->oa.o_flags);
2824 repbody->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
2825 repbody->oa.o_flags &= ~OBD_FL_CKSUM_ALL;
2826 repbody->oa.o_flags |= obd_cksum_type_pack(obd_name,
2829 rc = tgt_checksum_niobuf_rw(tsi->tsi_tgt, cksum_type,
2830 local_nb, npages, OST_WRITE,
2831 &repbody->oa.o_cksum, false);
2833 GOTO(out_commitrw, rc);
2837 if (unlikely(body->oa.o_cksum != repbody->oa.o_cksum)) {
2838 mmap = (body->oa.o_valid & OBD_MD_FLFLAGS &&
2839 body->oa.o_flags & OBD_FL_MMAP);
2841 tgt_warn_on_cksum(req, desc, local_nb, npages,
2843 repbody->oa.o_cksum, mmap);
2845 } else if ((cksum_counter & (-cksum_counter)) ==
2847 CDEBUG(D_INFO, "Checksum %u from %s OK: %x\n",
2848 cksum_counter, libcfs_id2str(req->rq_peer),
2849 repbody->oa.o_cksum);
2853 OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK2, cfs_fail_val);
2856 /* calculate the expected actual write bytes (nob) for OFD stats.
2857 * Technically, if commit fails this would be wrong, but that should be
2860 for (i = 0; i < niocount; i++) {
2861 int len = remote_nb[i].rnb_len;
2866 /* multiple transactions can be assigned during write commit */
2867 tti->tti_mult_trans = 1;
2869 /* Must commit after prep above in all cases */
2870 rc = obd_commitrw(tsi->tsi_env, OBD_BRW_WRITE, exp, &repbody->oa,
2871 objcount, ioo, remote_nb, npages, local_nb, rc, nob,
2873 if (rc == -ENOTCONN)
2874 /* quota acquire process has been given up because
2875 * either the client has been evicted or the client
2876 * has timed out the request already
2880 for (i = 0; i < niocount; i++) {
2881 if (!(local_nb[i].lnb_flags & OBD_BRW_ASYNC)) {
2887 * Disable sending mtime back to the client. If the client locked the
2888 * whole object, then it has already updated the mtime on its side,
2889 * otherwise it will have to glimpse anyway (see bug 21489, comment 32)
2891 repbody->oa.o_valid &= ~(OBD_MD_FLMTIME | OBD_MD_FLATIME);
2894 /* set per-requested niobuf return codes */
2895 for (i = j = 0; i < niocount; i++) {
2896 int len = remote_nb[i].rnb_len;
2900 LASSERT(j < npages);
2901 if (local_nb[j].lnb_rc < 0)
2902 rcs[i] = local_nb[j].lnb_rc;
2903 len -= local_nb[j].lnb_len;
2908 LASSERT(j == npages);
2909 ptlrpc_lprocfs_brw(req, nob);
2912 tgt_brw_unlock(exp, ioo, remote_nb, &lockh, LCK_PW);
2914 ptlrpc_free_bulk(desc);
2916 if (unlikely(no_reply || (exp->exp_obd->obd_no_transno && wait_sync))) {
2917 req->rq_no_reply = 1;
2918 /* reply out callback would free */
2919 ptlrpc_req_drop_rs(req);
2920 if (!exp->exp_obd->obd_no_transno)
2921 LCONSOLE_WARN("%s: Bulk IO write error with %s (at %s),"
2922 " client will retry: rc = %d\n",
2924 obd_uuid2str(&exp->exp_client_uuid),
2925 obd_export_nid2str(exp), rc);
2929 memalloc_noreclaim_restore(mpflags);
2933 EXPORT_SYMBOL(tgt_brw_write);
2936 * Common request handler for OST_SEEK RPC.
2938 * Unified request handling for OST_SEEK RPC.
2939 * It takes object by its FID, does needed lseek and packs result
2940 * into reply. Only SEEK_HOLE and SEEK_DATA are supported.
2942 * \param[in] tsi target session environment for this request
2944 * \retval 0 if successful
2945 * \retval negative value on error
2947 int tgt_lseek(struct tgt_session_info *tsi)
2949 struct lustre_handle lh = { 0 };
2950 struct dt_object *dob;
2951 struct ost_body *repbody;
2952 loff_t offset = tsi->tsi_ost_body->oa.o_size;
2953 int whence = tsi->tsi_ost_body->oa.o_mode;
2959 if (whence != SEEK_HOLE && whence != SEEK_DATA)
2962 /* Negative offset is prohibited on wire and must be handled on client
2963 * prior sending RPC.
2968 repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
2969 if (repbody == NULL)
2971 repbody->oa = tsi->tsi_ost_body->oa;
2973 srvlock = tsi->tsi_ost_body->oa.o_valid & OBD_MD_FLFLAGS &&
2974 tsi->tsi_ost_body->oa.o_flags & OBD_FL_SRVLOCK;
2976 rc = tgt_data_lock(tsi->tsi_env, tsi->tsi_exp, &tsi->tsi_resid,
2977 offset, OBD_OBJECT_EOF, &lh, LCK_PR);
2982 dob = dt_locate(tsi->tsi_env, tsi->tsi_tgt->lut_bottom, &tsi->tsi_fid);
2984 GOTO(out, rc = PTR_ERR(dob));
2986 if (!dt_object_exists(dob))
2987 GOTO(obj_put, rc = -ENOENT);
2989 repbody->oa.o_size = dt_lseek(tsi->tsi_env, dob, offset, whence);
2992 dt_object_put(tsi->tsi_env, dob);
2995 tgt_data_unlock(&lh, LCK_PR);
2999 EXPORT_SYMBOL(tgt_lseek);
3001 /* Check if request can be reconstructed from saved reply data
3002 * A copy of the reply data is returned in @trd if the pointer is not NULL
3004 int req_can_reconstruct(struct ptlrpc_request *req,
3005 struct tg_reply_data *trd)
3007 struct tg_export_data *ted = &req->rq_export->exp_target_data;
3008 struct lsd_client_data *lcd = ted->ted_lcd;
3011 if (tgt_is_multimodrpcs_client(req->rq_export))
3012 return tgt_lookup_reply(req, trd);
3014 mutex_lock(&ted->ted_lcd_lock);
3015 found = req->rq_xid == lcd->lcd_last_xid ||
3016 req->rq_xid == lcd->lcd_last_close_xid;
3018 if (found && trd != NULL) {
3019 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE) {
3020 trd->trd_reply.lrd_xid = lcd->lcd_last_close_xid;
3021 trd->trd_reply.lrd_transno =
3022 lcd->lcd_last_close_transno;
3023 trd->trd_reply.lrd_result = lcd->lcd_last_close_result;
3025 trd->trd_reply.lrd_xid = lcd->lcd_last_xid;
3026 trd->trd_reply.lrd_transno = lcd->lcd_last_transno;
3027 trd->trd_reply.lrd_result = lcd->lcd_last_result;
3028 trd->trd_reply.lrd_data = lcd->lcd_last_data;
3029 trd->trd_pre_versions[0] = lcd->lcd_pre_versions[0];
3030 trd->trd_pre_versions[1] = lcd->lcd_pre_versions[1];
3031 trd->trd_pre_versions[2] = lcd->lcd_pre_versions[2];
3032 trd->trd_pre_versions[3] = lcd->lcd_pre_versions[3];
3035 mutex_unlock(&ted->ted_lcd_lock);
3039 EXPORT_SYMBOL(req_can_reconstruct);