X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;ds=sidebyside;f=lustre%2Ftarget%2Ftgt_handler.c;h=d82ee10798844a2f75c6790980b26831d7a56ece;hb=8867e6138c228cce89b94fb9415a2557f8e43ad6;hp=c06bb18352340936b868b24336c192171a1f4559;hpb=d843591c30d63bf54024e21b48dec92eb0ec9f68;p=fs%2Flustre-release.git diff --git a/lustre/target/tgt_handler.c b/lustre/target/tgt_handler.c index c06bb18..d82ee10 100644 --- a/lustre/target/tgt_handler.c +++ b/lustre/target/tgt_handler.c @@ -21,7 +21,7 @@ * GPL HEADER END */ /* - * Copyright (c) 2011, 2014, Intel Corporation. + * Copyright (c) 2012, 2015, Intel Corporation. */ /* * lustre/target/tgt_handler.c @@ -374,9 +374,25 @@ static int tgt_handle_request0(struct tgt_session_info *tsi, { int serious = 0; int rc; + __u32 opc = lustre_msg_get_opc(req->rq_reqmsg); ENTRY; + + /* When dealing with sec context requests, no export is associated yet, + * because these requests are sent before *_CONNECT requests. + * A NULL req->rq_export means the normal *_common_slice handlers will + * not be called, because there is no reference to the target. + * So deal with them by hand and jump directly to target_send_reply(). + */ + switch (opc) { + case SEC_CTX_INIT: + case SEC_CTX_INIT_CONT: + case SEC_CTX_FINI: + CFS_FAIL_TIMEOUT(OBD_FAIL_SEC_CTX_HDL_PAUSE, cfs_fail_val); + GOTO(out, rc = 0); + } + /* * Checking for various OBD_FAIL_$PREF_$OPC_NET codes. _Do_ not try * to put same checks into handlers like mdt_close(), mdt_reint(), @@ -390,6 +406,9 @@ static int tgt_handle_request0(struct tgt_session_info *tsi, */ if (OBD_FAIL_CHECK_ORSET(h->th_fail_id, OBD_FAIL_ONCE)) RETURN(0); + if (unlikely(lustre_msg_get_opc(req->rq_reqmsg) == MDS_REINT && + OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_MULTI_NET))) + RETURN(0); rc = tgt_request_preprocess(tsi, h, req); /* pack reply if reply format is fixed */ @@ -444,6 +463,7 @@ static int tgt_handle_request0(struct tgt_session_info *tsi, if (likely(rc == 0 && req->rq_export)) target_committed_to_req(req); +out: target_send_reply(req, rc, tsi->tsi_reply_fail_id); RETURN(0); } @@ -510,11 +530,11 @@ static int tgt_handle_recovery(struct ptlrpc_request *req, int reply_fail_id) /* sanity check: if the xid matches, the request must be marked as a * resent or replayed */ - if (req_xid_is_last(req)) { + if (req_can_reconstruct(req, NULL)) { if (!(lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY))) { DEBUG_REQ(D_WARNING, req, "rq_xid "LPU64" matches " - "last_xid, expected REPLAY or RESENT flag " + "saved xid, expected REPLAY or RESENT flag " "(%x)", req->rq_xid, lustre_msg_get_flags(req->rq_reqmsg)); req->rq_status = -ENOTCONN; @@ -584,6 +604,52 @@ static struct tgt_handler *tgt_handler_find_check(struct ptlrpc_request *req) RETURN(h); } +static int process_req_last_xid(struct ptlrpc_request *req) +{ + __u64 last_xid; + ENTRY; + + /* check request's xid is consistent with export's last_xid */ + last_xid = lustre_msg_get_last_xid(req->rq_reqmsg); + if (last_xid > req->rq_export->exp_last_xid) + req->rq_export->exp_last_xid = last_xid; + + if (req->rq_xid == 0 || + (req->rq_xid <= req->rq_export->exp_last_xid)) { + DEBUG_REQ(D_ERROR, req, "Unexpected xid %llx vs. " + "last_xid %llx\n", req->rq_xid, + req->rq_export->exp_last_xid); + /* Some request is allowed to be sent during replay, + * such as OUT update requests, FLD requests, so it + * is possible that replay requests has smaller XID + * than the exp_last_xid. + * + * Some non-replay requests may have smaller XID as + * well: + * + * - Client send a no_resend RPC, like statfs; + * - The RPC timedout (or some other error) on client, + * then it's removed from the unreplied list; + * - Client send some other request to bump the + * exp_last_xid on server; + * - The former RPC got chance to be processed; + */ + if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)) + RETURN(-EPROTO); + } + + /* try to release in-memory reply data */ + if (tgt_is_multimodrpcs_client(req->rq_export)) { + tgt_handle_received_xid(req->rq_export, + lustre_msg_get_last_xid(req->rq_reqmsg)); + if (!(lustre_msg_get_flags(req->rq_reqmsg) & + (MSG_RESENT | MSG_REPLAY))) + tgt_handle_tag(req->rq_export, + lustre_msg_get_tag(req->rq_reqmsg)); + } + RETURN(0); +} + int tgt_request_handle(struct ptlrpc_request *req) { struct tgt_session_info *tsi = tgt_ses_info(req->rq_svc_thread->t_env); @@ -593,8 +659,9 @@ int tgt_request_handle(struct ptlrpc_request *req) struct lu_target *tgt; int request_fail_id = 0; __u32 opc = lustre_msg_get_opc(msg); + struct obd_device *obd; int rc; - + bool is_connect = false; ENTRY; /* Refill the context, to make sure all thread keys are allocated */ @@ -608,6 +675,7 @@ int tgt_request_handle(struct ptlrpc_request *req) * target, otherwise that should be connect operation */ if (opc == MDS_CONNECT || opc == OST_CONNECT || opc == MGS_CONNECT) { + is_connect = true; req_capsule_set(&req->rq_pill, &RQF_CONNECT); rc = target_handle_connect(req); if (rc != 0) { @@ -621,6 +689,14 @@ int tgt_request_handle(struct ptlrpc_request *req) } if (unlikely(!class_connected_export(req->rq_export))) { + if (opc == SEC_CTX_INIT || opc == SEC_CTX_INIT_CONT || + opc == SEC_CTX_FINI) { + /* sec context initialization has to be handled + * by hand in tgt_handle_request0() */ + tsi->tsi_reply_fail_id = OBD_FAIL_SEC_CTX_INIT_NET; + h = NULL; + GOTO(handle_recov, rc = 0); + } CDEBUG(D_HA, "operation %d on unconnected OST from %s\n", opc, libcfs_id2str(req->rq_peer)); req->rq_status = -ENOTCONN; @@ -643,6 +719,24 @@ int tgt_request_handle(struct ptlrpc_request *req) GOTO(out, rc); } + /* Skip last_xid processing for the recovery thread, otherwise, the + * last_xid on same request could be processed twice: first time when + * processing the incoming request, second time when the request is + * being processed by recovery thread. */ + obd = class_exp2obd(req->rq_export); + if (is_connect) { + /* reset the exp_last_xid on each connection. */ + req->rq_export->exp_last_xid = 0; + } else if (obd->obd_recovery_data.trd_processing_task != + current_pid()) { + rc = process_req_last_xid(req); + if (rc) { + req->rq_status = rc; + rc = ptlrpc_error(req); + GOTO(out, rc); + } + } + request_fail_id = tgt->lut_request_fail_id; tsi->tsi_reply_fail_id = tgt->lut_reply_fail_id; @@ -653,6 +747,9 @@ int tgt_request_handle(struct ptlrpc_request *req) GOTO(out, rc); } + LASSERTF(h->th_opc == opc, "opcode mismatch %d != %d\n", + h->th_opc, opc); + if (CFS_FAIL_CHECK_ORSET(request_fail_id, CFS_FAIL_ONCE)) GOTO(out, rc = 0); @@ -666,10 +763,9 @@ int tgt_request_handle(struct ptlrpc_request *req) GOTO(out, rc); } +handle_recov: rc = tgt_handle_recovery(req, tsi->tsi_reply_fail_id); if (likely(rc == 1)) { - LASSERTF(h->th_opc == opc, "opcode mismatch %d != %d\n", - h->th_opc, opc); rc = tgt_handle_request0(tsi, h, req); if (rc) GOTO(out, rc); @@ -876,6 +972,16 @@ int tgt_connect_check_sptlrpc(struct ptlrpc_request *req, struct obd_export *exp spin_lock(&exp->exp_lock); exp->exp_sp_peer = req->rq_sp_from; exp->exp_flvr = flvr; + + /* when on mgs, if no restriction is set, or if client + * is loopback, allow any flavor */ + if ((strcmp(exp->exp_obd->obd_type->typ_name, + LUSTRE_MGS_NAME) == 0) && + (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_NULL || + LNET_NETTYP(LNET_NIDNET(exp->exp_connection->c_peer.nid)) + == LOLND)) + exp->exp_flvr.sf_rpc = SPTLRPC_FLVR_ANY; + if (exp->exp_flvr.sf_rpc != SPTLRPC_FLVR_ANY && exp->exp_flvr.sf_rpc != req->rq_flvr.sf_rpc) { CERROR("%s: unauthorized rpc flavor %x from %s, " @@ -1003,6 +1109,35 @@ int tgt_obd_log_cancel(struct tgt_session_info *tsi) return err_serious(-EOPNOTSUPP); } +int tgt_send_buffer(struct tgt_session_info *tsi, struct lu_rdbuf *rdbuf) +{ + struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env); + struct ptlrpc_request *req = tgt_ses_req(tsi); + struct obd_export *exp = req->rq_export; + struct ptlrpc_bulk_desc *desc; + struct l_wait_info *lwi = &tti->tti_u.update.tti_wait_info; + int i; + int rc; + + ENTRY; + + desc = ptlrpc_prep_bulk_exp(req, rdbuf->rb_nbufs, 1, + PTLRPC_BULK_PUT_SOURCE | PTLRPC_BULK_BUF_KVEC, + MDS_BULK_PORTAL, &ptlrpc_bulk_kvec_ops); + if (desc == NULL) + RETURN(-ENOMEM); + + for (i = 0; i < rdbuf->rb_nbufs; i++) + desc->bd_frag_ops->add_iov_frag(desc, + rdbuf->rb_bufs[i].lb_buf, + rdbuf->rb_bufs[i].lb_len); + + rc = target_bulk_io(exp, desc, lwi); + ptlrpc_free_bulk(desc); + RETURN(rc); +} +EXPORT_SYMBOL(tgt_send_buffer); + int tgt_sendpage(struct tgt_session_info *tsi, struct lu_rdpg *rdpg, int nob) { struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env); @@ -1017,8 +1152,11 @@ int tgt_sendpage(struct tgt_session_info *tsi, struct lu_rdpg *rdpg, int nob) ENTRY; - desc = ptlrpc_prep_bulk_exp(req, rdpg->rp_npages, 1, BULK_PUT_SOURCE, - MDS_BULK_PORTAL); + desc = ptlrpc_prep_bulk_exp(req, rdpg->rp_npages, 1, + PTLRPC_BULK_PUT_SOURCE | + PTLRPC_BULK_BUF_KIOV, + MDS_BULK_PORTAL, + &ptlrpc_bulk_kiov_pin_ops); if (desc == NULL) RETURN(-ENOMEM); @@ -1030,12 +1168,13 @@ int tgt_sendpage(struct tgt_session_info *tsi, struct lu_rdpg *rdpg, int nob) for (i = 0, tmpcount = nob; i < rdpg->rp_npages && tmpcount > 0; i++, tmpcount -= tmpsize) { tmpsize = min_t(int, tmpcount, PAGE_CACHE_SIZE); - ptlrpc_prep_bulk_page_pin(desc, rdpg->rp_pages[i], 0, tmpsize); + desc->bd_frag_ops->add_kiov_frag(desc, rdpg->rp_pages[i], 0, + tmpsize); } LASSERT(desc->bd_nob == nob); rc = target_bulk_io(exp, desc, lwi); - ptlrpc_free_bulk_pin(desc); + ptlrpc_free_bulk(desc); RETURN(rc); } EXPORT_SYMBOL(tgt_sendpage); @@ -1146,6 +1285,7 @@ int tgt_sync(const struct lu_env *env, struct lu_target *tgt, tgt->lut_obd->obd_last_committed) { rc = dt_object_sync(env, obj, start, end); } + atomic_inc(&tgt->lut_sync_count); RETURN(rc); } @@ -1154,14 +1294,27 @@ EXPORT_SYMBOL(tgt_sync); * Unified target DLM handlers. */ -/* Ensure that data and metadata are synced to the disk when lock is cancelled - * (if requested) */ +/** + * Unified target BAST + * + * Ensure data and metadata are synced to disk when lock is canceled if Sync on + * Cancel (SOC) is enabled. If it's extent lock, normally sync obj is enough, + * but if it's cross-MDT lock, because remote object version is not set, a + * filesystem sync is needed. + * + * \param lock server side lock + * \param desc lock desc + * \param data ldlm_cb_set_arg + * \param flag indicates whether this cancelling or blocking callback + * \retval 0 on success + * \retval negative number on error + */ static int tgt_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc, void *data, int flag) { struct lu_env env; struct lu_target *tgt; - struct dt_object *obj; + struct dt_object *obj = NULL; struct lu_fid fid; int rc = 0; @@ -1176,10 +1329,12 @@ static int tgt_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc, } if (flag == LDLM_CB_CANCELING && - (lock->l_granted_mode & (LCK_PW | LCK_GROUP)) && + (lock->l_granted_mode & (LCK_EX | LCK_PW | LCK_GROUP)) && (tgt->lut_sync_lock_cancel == ALWAYS_SYNC_ON_CANCEL || (tgt->lut_sync_lock_cancel == BLOCKING_SYNC_ON_CANCEL && - lock->l_flags & LDLM_FL_CBPENDING))) { + ldlm_is_cbpending(lock))) && + ((exp_connect_flags(lock->l_export) & OBD_CONNECT_MDS_MDS) || + lock->l_resource->lr_type == LDLM_EXTENT)) { __u64 start = 0; __u64 end = OBD_OBJECT_EOF; @@ -1189,14 +1344,15 @@ static int tgt_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc, ost_fid_from_resid(&fid, &lock->l_resource->lr_name, tgt->lut_lsd.lsd_osd_index); - obj = dt_locate(&env, tgt->lut_bottom, &fid); - if (IS_ERR(obj)) - GOTO(err_env, rc = PTR_ERR(obj)); - - if (!dt_object_exists(obj)) - GOTO(err_put, rc = -ENOENT); if (lock->l_resource->lr_type == LDLM_EXTENT) { + obj = dt_locate(&env, tgt->lut_bottom, &fid); + if (IS_ERR(obj)) + GOTO(err_env, rc = PTR_ERR(obj)); + + if (!dt_object_exists(obj)) + GOTO(err_put, rc = -ENOENT); + start = lock->l_policy_data.l_extent.start; end = lock->l_policy_data.l_extent.end; } @@ -1210,7 +1366,8 @@ static int tgt_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc, lock->l_policy_data.l_extent.end, rc); } err_put: - lu_object_put(&env, &obj->do_lu); + if (obj != NULL) + lu_object_put(&env, &obj->do_lu); err_env: lu_env_fini(&env); } @@ -1516,8 +1673,8 @@ int tgt_extent_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id, __u64 start, __u64 end, struct lustre_handle *lh, int mode, __u64 *flags) { - ldlm_policy_data_t policy; - int rc; + union ldlm_policy_data policy; + int rc; ENTRY; @@ -1545,7 +1702,7 @@ int tgt_extent_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id, } EXPORT_SYMBOL(tgt_extent_lock); -void tgt_extent_unlock(struct lustre_handle *lh, ldlm_mode_t mode) +void tgt_extent_unlock(struct lustre_handle *lh, enum ldlm_mode mode) { LASSERT(lustre_handle_is_used(lh)); ldlm_lock_decref(lh, mode); @@ -1554,7 +1711,7 @@ EXPORT_SYMBOL(tgt_extent_unlock); int tgt_brw_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id, struct obd_ioobj *obj, struct niobuf_remote *nb, - struct lustre_handle *lh, int mode) + struct lustre_handle *lh, enum ldlm_mode mode) { __u64 flags = 0; int nrbufs = obj->ioo_bufcnt; @@ -1579,7 +1736,7 @@ int tgt_brw_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id, } void tgt_brw_unlock(struct obd_ioobj *obj, struct niobuf_remote *niob, - struct lustre_handle *lh, int mode) + struct lustre_handle *lh, enum ldlm_mode mode) { ENTRY; @@ -1603,6 +1760,8 @@ static __u32 tgt_checksum_bulk(struct lu_target *tgt, unsigned char cfs_alg = cksum_obd2cfs(cksum_type); __u32 cksum; + LASSERT(ptlrpc_is_bulk_desc_kiov(desc->bd_type)); + hdesc = cfs_crypto_hash_init(cfs_alg, NULL, 0); if (IS_ERR(hdesc)) { CERROR("%s: unable to initialize checksum hash %s\n", @@ -1616,10 +1775,11 @@ static __u32 tgt_checksum_bulk(struct lu_target *tgt, * simulate a client->OST data error */ if (i == 0 && opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) { - int off = desc->bd_iov[i].kiov_offset & ~PAGE_MASK; - int len = desc->bd_iov[i].kiov_len; + int off = BD_GET_KIOV(desc, i).kiov_offset & + ~PAGE_MASK; + int len = BD_GET_KIOV(desc, i).kiov_len; struct page *np = tgt_page_to_corrupt; - char *ptr = kmap(desc->bd_iov[i].kiov_page) + off; + char *ptr = kmap(BD_GET_KIOV(desc, i).kiov_page) + off; if (np) { char *ptr2 = kmap(np) + off; @@ -1627,24 +1787,28 @@ static __u32 tgt_checksum_bulk(struct lu_target *tgt, memcpy(ptr2, ptr, len); memcpy(ptr2, "bad3", min(4, len)); kunmap(np); - desc->bd_iov[i].kiov_page = np; + BD_GET_KIOV(desc, i).kiov_page = np; } else { CERROR("%s: can't alloc page for corruption\n", tgt_name(tgt)); } } - cfs_crypto_hash_update_page(hdesc, desc->bd_iov[i].kiov_page, - desc->bd_iov[i].kiov_offset & ~PAGE_MASK, - desc->bd_iov[i].kiov_len); + cfs_crypto_hash_update_page(hdesc, + BD_GET_KIOV(desc, i).kiov_page, + BD_GET_KIOV(desc, i).kiov_offset & + ~PAGE_MASK, + BD_GET_KIOV(desc, i).kiov_len); /* corrupt the data after we compute the checksum, to * simulate an OST->client data error */ if (i == 0 && opc == OST_READ && OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND)) { - int off = desc->bd_iov[i].kiov_offset & ~PAGE_MASK; - int len = desc->bd_iov[i].kiov_len; + int off = BD_GET_KIOV(desc, i).kiov_offset + & ~PAGE_MASK; + int len = BD_GET_KIOV(desc, i).kiov_len; struct page *np = tgt_page_to_corrupt; - char *ptr = kmap(desc->bd_iov[i].kiov_page) + off; + char *ptr = + kmap(BD_GET_KIOV(desc, i).kiov_page) + off; if (np) { char *ptr2 = kmap(np) + off; @@ -1652,7 +1816,7 @@ static __u32 tgt_checksum_bulk(struct lu_target *tgt, memcpy(ptr2, ptr, len); memcpy(ptr2, "bad4", min(4, len)); kunmap(np); - desc->bd_iov[i].kiov_page = np; + BD_GET_KIOV(desc, i).kiov_page = np; } else { CERROR("%s: can't alloc page for corruption\n", tgt_name(tgt)); @@ -1755,7 +1919,10 @@ int tgt_brw_read(struct tgt_session_info *tsi) GOTO(out_lock, rc); desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo), - BULK_PUT_SOURCE, OST_BULK_PORTAL); + PTLRPC_BULK_PUT_SOURCE | + PTLRPC_BULK_BUF_KIOV, + OST_BULK_PORTAL, + &ptlrpc_bulk_kiov_nopin_ops); if (desc == NULL) GOTO(out_commitrw, rc = -ENOMEM); @@ -1771,9 +1938,10 @@ int tgt_brw_read(struct tgt_session_info *tsi) nob += page_rc; if (page_rc != 0) { /* some data! */ LASSERT(local_nb[i].lnb_page != NULL); - ptlrpc_prep_bulk_page_nopin(desc, local_nb[i].lnb_page, - local_nb[i].lnb_page_offset, - page_rc); + desc->bd_frag_ops->add_kiov_frag + (desc, local_nb[i].lnb_page, + local_nb[i].lnb_page_offset, + page_rc); } if (page_rc != local_nb[i].lnb_len) { /* short read */ @@ -1783,6 +1951,9 @@ int tgt_brw_read(struct tgt_session_info *tsi) break; } } + if (OBD_FAIL_CHECK(OBD_FAIL_OST_READ_SIZE) && + nob != cfs_fail_val) + rc = -E2BIG; if (body->oa.o_valid & OBD_MD_FLCKSUM) { cksum_type_t cksum_type = @@ -1817,7 +1988,7 @@ out_lock: tgt_brw_unlock(ioo, remote_nb, &lockh, LCK_PR); if (desc && !CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)) - ptlrpc_free_bulk_nopin(desc); + ptlrpc_free_bulk(desc); LASSERT(rc <= 0); if (rc == 0) { @@ -1845,7 +2016,7 @@ out_lock: lwi1 = LWI_TIMEOUT_INTR(cfs_time_seconds(3), NULL, NULL, NULL); l_wait_event(waitq, 0, &lwi1); target_bulk_io(exp, desc, &lwi); - ptlrpc_free_bulk_nopin(desc); + ptlrpc_free_bulk(desc); } RETURN(rc); @@ -2020,15 +2191,18 @@ int tgt_brw_write(struct tgt_session_info *tsi) GOTO(out_lock, rc); desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo), - BULK_GET_SINK, OST_BULK_PORTAL); + PTLRPC_BULK_GET_SINK | PTLRPC_BULK_BUF_KIOV, + OST_BULK_PORTAL, + &ptlrpc_bulk_kiov_nopin_ops); if (desc == NULL) GOTO(skip_transfer, rc = -ENOMEM); /* NB Having prepped, we must commit... */ for (i = 0; i < npages; i++) - ptlrpc_prep_bulk_page_nopin(desc, local_nb[i].lnb_page, - local_nb[i].lnb_page_offset, - local_nb[i].lnb_len); + desc->bd_frag_ops->add_kiov_frag(desc, + local_nb[i].lnb_page, + local_nb[i].lnb_page_offset, + local_nb[i].lnb_len); rc = sptlrpc_svc_prep_bulk(req, desc); if (rc != 0) @@ -2109,7 +2283,7 @@ skip_transfer: out_lock: tgt_brw_unlock(ioo, remote_nb, &lockh, LCK_PW); if (desc) - ptlrpc_free_bulk_nopin(desc); + ptlrpc_free_bulk(desc); out: if (no_reply) { req->rq_no_reply = 1; @@ -2125,3 +2299,44 @@ out: RETURN(rc); } EXPORT_SYMBOL(tgt_brw_write); + +/* Check if request can be reconstructed from saved reply data + * A copy of the reply data is returned in @trd if the pointer is not NULL + */ +bool req_can_reconstruct(struct ptlrpc_request *req, + struct tg_reply_data *trd) +{ + struct tg_export_data *ted = &req->rq_export->exp_target_data; + struct lsd_client_data *lcd = ted->ted_lcd; + bool found; + + if (tgt_is_multimodrpcs_client(req->rq_export)) + return tgt_lookup_reply(req, trd); + + mutex_lock(&ted->ted_lcd_lock); + found = req->rq_xid == lcd->lcd_last_xid || + req->rq_xid == lcd->lcd_last_close_xid; + + if (found && trd != NULL) { + if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE) { + trd->trd_reply.lrd_xid = lcd->lcd_last_close_xid; + trd->trd_reply.lrd_transno = + lcd->lcd_last_close_transno; + trd->trd_reply.lrd_result = lcd->lcd_last_close_result; + } else { + trd->trd_reply.lrd_xid = lcd->lcd_last_xid; + trd->trd_reply.lrd_transno = lcd->lcd_last_transno; + trd->trd_reply.lrd_result = lcd->lcd_last_result; + trd->trd_reply.lrd_data = lcd->lcd_last_data; + trd->trd_pre_versions[0] = lcd->lcd_pre_versions[0]; + trd->trd_pre_versions[1] = lcd->lcd_pre_versions[1]; + trd->trd_pre_versions[2] = lcd->lcd_pre_versions[2]; + trd->trd_pre_versions[3] = lcd->lcd_pre_versions[3]; + } + } + mutex_unlock(&ted->ted_lcd_lock); + + return found; +} +EXPORT_SYMBOL(req_can_reconstruct); +