/* * GPL HEADER START * * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 only, * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License version 2 for more details (a copy is included * in the LICENSE file that accompanied this code). * * You should have received a copy of the GNU General Public License * version 2 along with this program; If not, see * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * * GPL HEADER END */ /* * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. * * Copyright (c) 2011, 2013, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ * Lustre is a trademark of Sun Microsystems, Inc. * * lustre/mdt/mdt_recovery.c * * Lustre Metadata Target (mdt) recovery-related methods * * Author: Huang Hua * Author: Pershin Mike */ #define DEBUG_SUBSYSTEM S_MDS #include "mdt_internal.h" struct lu_buf *mdt_buf(const struct lu_env *env, void *area, ssize_t len) { struct lu_buf *buf; struct mdt_thread_info *mti; mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key); buf = &mti->mti_buf; buf->lb_buf = area; buf->lb_len = len; return buf; } const struct lu_buf *mdt_buf_const(const struct lu_env *env, const void *area, ssize_t len) { struct lu_buf *buf; struct mdt_thread_info *mti; mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key); buf = &mti->mti_buf; buf->lb_buf = (void *)area; buf->lb_len = len; return buf; } void mdt_trans_stop(const struct lu_env *env, struct mdt_device *mdt, struct thandle *th) { dt_trans_stop(env, mdt->mdt_bottom, th); } static int mdt_clients_data_init(const struct lu_env *env, struct mdt_device *mdt, unsigned long last_size) { struct lr_server_data *lsd = &mdt->mdt_lut.lut_lsd; struct lsd_client_data *lcd; struct obd_device *obd = mdt2obd_dev(mdt); loff_t off; int cl_idx; int rc = 0; ENTRY; OBD_ALLOC_PTR(lcd); if (!lcd) RETURN(-ENOMEM); /* When we do a clean MDS shutdown, we save the last_transno into * the header. If we find clients with higher last_transno values * then those clients may need recovery done. */ LASSERT(cfs_atomic_read(&obd->obd_req_replay_clients) == 0); for (cl_idx = 0, off = lsd->lsd_client_start; off < last_size; cl_idx++) { __u64 last_transno; struct obd_export *exp; struct mdt_thread_info *mti; off = lsd->lsd_client_start + cl_idx * lsd->lsd_client_size; rc = tgt_client_data_read(env, &mdt->mdt_lut, lcd, &off, cl_idx); if (rc) { CERROR("error reading MDS %s idx %d, off %llu: rc %d\n", LAST_RCVD, cl_idx, off, rc); rc = 0; break; /* read error shouldn't cause startup to fail */ } if (lcd->lcd_uuid[0] == '\0') { CDEBUG(D_INFO, "skipping zeroed client at offset %d\n", cl_idx); continue; } last_transno = lcd_last_transno(lcd); /* These exports are cleaned up by mdt_obd_disconnect(), so * they need to be set up like real exports as * mdt_obd_connect() does. */ CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64 " srv lr: "LPU64" lx: "LPU64"\n", lcd->lcd_uuid, cl_idx, last_transno, lsd->lsd_last_transno, lcd_last_xid(lcd)); exp = class_new_export(obd, (struct obd_uuid *)lcd->lcd_uuid); if (IS_ERR(exp)) { if (PTR_ERR(exp) == -EALREADY) { /* export already exists, zero out this one */ CERROR("Duplicate export %s!\n", lcd->lcd_uuid); continue; } GOTO(err_client, rc = PTR_ERR(exp)); } mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key); LASSERT(mti != NULL); mti->mti_exp = exp; /* copy on-disk lcd to the export */ *exp->exp_target_data.ted_lcd = *lcd; rc = tgt_client_add(env, exp, cl_idx); /* can't fail existing */ LASSERTF(rc == 0, "rc = %d\n", rc); /* VBR: set export last committed version */ exp->exp_last_committed = last_transno; spin_lock(&exp->exp_lock); exp->exp_connecting = 0; exp->exp_in_recovery = 0; spin_unlock(&exp->exp_lock); obd->obd_max_recoverable_clients++; class_export_put(exp); CDEBUG(D_OTHER, "client at idx %d has last_transno ="LPU64"\n", cl_idx, last_transno); /* protect __u64 value update */ spin_lock(&mdt->mdt_lut.lut_translock); mdt->mdt_lut.lut_last_transno = max(last_transno, mdt->mdt_lut.lut_last_transno); spin_unlock(&mdt->mdt_lut.lut_translock); } err_client: OBD_FREE_PTR(lcd); RETURN(rc); } static int mdt_server_data_init(const struct lu_env *env, struct mdt_device *mdt, struct lustre_sb_info *lsi) { struct lr_server_data *lsd = &mdt->mdt_lut.lut_lsd; struct lsd_client_data *lcd = NULL; struct obd_device *obd = mdt2obd_dev(mdt); struct mdt_thread_info *mti; struct dt_object *obj; struct lu_attr *la; unsigned long last_rcvd_size; __u32 index; __u64 mount_count; int rc; ENTRY; /* ensure padding in the struct is the correct size */ CLASSERT(offsetof(struct lr_server_data, lsd_padding) + sizeof(lsd->lsd_padding) == LR_SERVER_SIZE); CLASSERT(offsetof(struct lsd_client_data, lcd_padding) + sizeof(lcd->lcd_padding) == LR_CLIENT_SIZE); rc = server_name2index(obd->obd_name, &index, NULL); if (rc < 0) { CERROR("%s: Can not get index from obd_name: rc = %d\n", obd->obd_name, rc); RETURN(rc); } mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key); LASSERT(mti != NULL); la = &mti->mti_attr.ma_attr; obj = mdt->mdt_lut.lut_last_rcvd; rc = dt_attr_get(env, obj, la, BYPASS_CAPA); if (rc) RETURN(rc); last_rcvd_size = (unsigned long)la->la_size; if (last_rcvd_size == 0) { LCONSOLE_WARN("%s: new disk, initializing\n", obd->obd_name); memcpy(lsd->lsd_uuid, obd->obd_uuid.uuid, sizeof(lsd->lsd_uuid)); lsd->lsd_last_transno = 0; lsd->lsd_mount_count = 0; lsd->lsd_server_size = LR_SERVER_SIZE; lsd->lsd_client_start = LR_CLIENT_START; lsd->lsd_client_size = LR_CLIENT_SIZE; lsd->lsd_feature_compat = OBD_COMPAT_MDT; lsd->lsd_feature_rocompat = OBD_ROCOMPAT_LOVOBJID; lsd->lsd_feature_incompat = OBD_INCOMPAT_MDT | OBD_INCOMPAT_COMMON_LR | OBD_INCOMPAT_MULTI_OI; lsd->lsd_osd_index = index; } else { LCONSOLE_WARN("%s: used disk, loading\n", obd->obd_name); rc = tgt_server_data_read(env, &mdt->mdt_lut); if (rc) { CERROR("error reading MDS %s: rc %d\n", LAST_RCVD, rc); GOTO(out, rc); } if (strcmp(lsd->lsd_uuid, obd->obd_uuid.uuid) != 0) { LCONSOLE_ERROR_MSG(0x157, "Trying to start OBD %s using" "the wrong disk %s. Were the /dev/ " "assignments rearranged?\n", obd->obd_uuid.uuid, lsd->lsd_uuid); GOTO(out, rc = -EINVAL); } lsd->lsd_feature_compat |= OBD_COMPAT_MDT; lsd->lsd_feature_incompat |= OBD_INCOMPAT_MDT | OBD_INCOMPAT_COMMON_LR; if (lsd->lsd_osd_index != index) { LCONSOLE_ERROR_MSG(0x157, "%s: index %d in last rcvd is" "different with the index %d in" "config log, It might be disk" "corruption!\n", obd->obd_name, lsd->lsd_osd_index, index); GOTO(out, rc = -EINVAL); } } mount_count = lsd->lsd_mount_count; if (lsd->lsd_feature_incompat & ~MDT_INCOMPAT_SUPP) { CERROR("%s: unsupported incompat filesystem feature(s) %x\n", obd->obd_name, lsd->lsd_feature_incompat & ~MDT_INCOMPAT_SUPP); GOTO(out, rc = -EINVAL); } if (lsd->lsd_feature_rocompat & ~MDT_ROCOMPAT_SUPP) { CERROR("%s: unsupported read-only filesystem feature(s) %x\n", obd->obd_name, lsd->lsd_feature_rocompat & ~MDT_ROCOMPAT_SUPP); /* XXX: Do something like remount filesystem read-only */ GOTO(out, rc = -EINVAL); } /** Interop: evict all clients at first boot with 1.8 last_rcvd */ if (!(lsd->lsd_feature_compat & OBD_COMPAT_20)) { if (last_rcvd_size > lsd->lsd_client_start) { LCONSOLE_WARN("Mounting %s at first time on 1.8 FS, " "remove all clients for interop needs\n", obd->obd_name); rc = tgt_truncate_last_rcvd(env, &mdt->mdt_lut, lsd->lsd_client_start); if (rc) GOTO(out, rc); last_rcvd_size = lsd->lsd_client_start; } /** set 2.0 flag to upgrade/downgrade between 1.8 and 2.0 */ lsd->lsd_feature_compat |= OBD_COMPAT_20; } lsd->lsd_feature_incompat |= OBD_INCOMPAT_FID; spin_lock(&mdt->mdt_lut.lut_translock); mdt->mdt_lut.lut_last_transno = lsd->lsd_last_transno; spin_unlock(&mdt->mdt_lut.lut_translock); CDEBUG(D_INODE, "========BEGIN DUMPING LAST_RCVD========\n"); CDEBUG(D_INODE, "%s: server last_transno: "LPU64"\n", obd->obd_name, mdt->mdt_lut.lut_last_transno); CDEBUG(D_INODE, "%s: server mount_count: "LPU64"\n", obd->obd_name, mount_count + 1); CDEBUG(D_INODE, "%s: server data size: %u\n", obd->obd_name, lsd->lsd_server_size); CDEBUG(D_INODE, "%s: per-client data start: %u\n", obd->obd_name, lsd->lsd_client_start); CDEBUG(D_INODE, "%s: per-client data size: %u\n", obd->obd_name, lsd->lsd_client_size); CDEBUG(D_INODE, "%s: last_rcvd size: %lu\n", obd->obd_name, last_rcvd_size); CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", obd->obd_name, last_rcvd_size <= lsd->lsd_client_start ? 0 : (last_rcvd_size - lsd->lsd_client_start) / lsd->lsd_client_size); CDEBUG(D_INODE, "========END DUMPING LAST_RCVD========\n"); if (!lsd->lsd_server_size || !lsd->lsd_client_start || !lsd->lsd_client_size) { CERROR("Bad last_rcvd contents!\n"); GOTO(out, rc = -EINVAL); } rc = mdt_clients_data_init(env, mdt, last_rcvd_size); if (rc) GOTO(err_client, rc); spin_lock(&mdt->mdt_lut.lut_translock); /* obd_last_committed is used for compatibility * with other lustre recovery code */ obd->obd_last_committed = mdt->mdt_lut.lut_last_transno; spin_unlock(&mdt->mdt_lut.lut_translock); obd->u.obt.obt_mount_count = mount_count + 1; obd->u.obt.obt_instance = (__u32)obd->u.obt.obt_mount_count; lsd->lsd_mount_count = obd->u.obt.obt_mount_count; /* save it, so mount count and last_transno is current */ rc = tgt_server_data_update(env, &mdt->mdt_lut, 0); if (rc) GOTO(err_client, rc); RETURN(0); err_client: class_disconnect_exports(obd); out: return rc; } /* * last_rcvd & last_committed update callbacks */ static int mdt_last_rcvd_update(struct mdt_thread_info *mti, struct thandle *th) { struct mdt_device *mdt = mti->mti_mdt; struct ptlrpc_request *req = mdt_info_req(mti); struct tg_export_data *ted; struct lsd_client_data *lcd; loff_t off; int err; __s32 rc = th->th_result; ENTRY; LASSERT(req); LASSERT(req->rq_export); LASSERT(mdt); ted = &req->rq_export->exp_target_data; LASSERT(ted); mutex_lock(&ted->ted_lcd_lock); lcd = ted->ted_lcd; /* if the export has already been disconnected, we have no last_rcvd * slot, update server data with latest transno then */ if (lcd == NULL) { mutex_unlock(&ted->ted_lcd_lock); CWARN("commit transaction for disconnected client %s: rc %d\n", req->rq_export->exp_client_uuid.uuid, rc); err = tgt_server_data_write(mti->mti_env, &mdt->mdt_lut, th); RETURN(err); } off = ted->ted_lr_off; LASSERT(ergo(mti->mti_transno == 0, rc != 0)); if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE || lustre_msg_get_opc(req->rq_reqmsg) == MDS_DONE_WRITING) { if (mti->mti_transno != 0) { if (lcd->lcd_last_close_transno > mti->mti_transno) { CERROR("Trying to overwrite bigger transno:" "on-disk: "LPU64", new: "LPU64" " "replay: %d. see LU-617.\n", lcd->lcd_last_close_transno, mti->mti_transno, req_is_replay(req)); if (req_is_replay(req)) { spin_lock(&req->rq_export->exp_lock); req->rq_export->exp_vbr_failed = 1; spin_unlock(&req->rq_export->exp_lock); } mutex_unlock(&ted->ted_lcd_lock); RETURN(req_is_replay(req) ? -EOVERFLOW : 0); } lcd->lcd_last_close_transno = mti->mti_transno; } lcd->lcd_last_close_xid = req->rq_xid; lcd->lcd_last_close_result = rc; } else { /* VBR: save versions in last_rcvd for reconstruct. */ __u64 *pre_versions = lustre_msg_get_versions(req->rq_repmsg); if (pre_versions) { lcd->lcd_pre_versions[0] = pre_versions[0]; lcd->lcd_pre_versions[1] = pre_versions[1]; lcd->lcd_pre_versions[2] = pre_versions[2]; lcd->lcd_pre_versions[3] = pre_versions[3]; } if (mti->mti_transno != 0) { if (lcd->lcd_last_transno > mti->mti_transno) { CERROR("Trying to overwrite bigger transno:" "on-disk: "LPU64", new: "LPU64" " "replay: %d. see LU-617.\n", lcd->lcd_last_transno, mti->mti_transno, req_is_replay(req)); if (req_is_replay(req)) { spin_lock(&req->rq_export->exp_lock); req->rq_export->exp_vbr_failed = 1; spin_unlock(&req->rq_export->exp_lock); } mutex_unlock(&ted->ted_lcd_lock); RETURN(req_is_replay(req) ? -EOVERFLOW : 0); } lcd->lcd_last_transno = mti->mti_transno; } lcd->lcd_last_xid = req->rq_xid; lcd->lcd_last_result = rc; /*XXX: save intent_disposition in mdt_thread_info? * also there is bug - intent_dispostion is __u64, * see struct ldlm_reply->lock_policy_res1; */ lcd->lcd_last_data = mti->mti_opdata; } if (exp_connect_flags(mti->mti_exp) & OBD_CONNECT_LIGHTWEIGHT) { /* Although lightweight (LW) connections have no slot in * last_rcvd, we still want to maintain the in-memory * lsd_client_data structure in order to properly handle reply * reconstruction. */ struct lu_target *tg = &mdt->mdt_lut; bool update = false; mutex_unlock(&ted->ted_lcd_lock); err = 0; /* All operations performed by LW clients are synchronous and * we store the committed transno in the last_rcvd header */ spin_lock(&tg->lut_translock); if (mti->mti_transno > tg->lut_lsd.lsd_last_transno) { tg->lut_lsd.lsd_last_transno = mti->mti_transno; update = true; } spin_unlock(&tg->lut_translock); if (update) err = tgt_server_data_write(mti->mti_env, tg, th); } else if (off <= 0) { CERROR("%s: client idx %d has offset %lld\n", mdt2obd_dev(mdt)->obd_name, ted->ted_lr_idx, off); mutex_unlock(&ted->ted_lcd_lock); err = -EINVAL; } else { err = tgt_client_data_write(mti->mti_env, &mdt->mdt_lut, lcd, &off, th); mutex_unlock(&ted->ted_lcd_lock); } RETURN(err); } extern struct lu_context_key mdt_thread_key; /* add credits for last_rcvd update */ static int mdt_txn_start_cb(const struct lu_env *env, struct thandle *th, void *cookie) { struct mdt_device *mdt = cookie; struct mdt_thread_info *mti; int rc; ENTRY; mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key); LASSERT(mdt->mdt_lut.lut_last_rcvd); if (mti->mti_exp == NULL) RETURN(0); rc = dt_declare_record_write(env, mdt->mdt_lut.lut_last_rcvd, sizeof(struct lsd_client_data), mti->mti_exp->exp_target_data.ted_lr_off, th); if (rc) return rc; rc = dt_declare_record_write(env, mdt->mdt_lut.lut_last_rcvd, sizeof(struct lr_server_data), 0, th); if (rc) return rc; if (mti->mti_mos != NULL) rc = dt_declare_version_set(env, mdt_obj2dt(mti->mti_mos), th); return rc; } /* Update last_rcvd records with latests transaction data */ static int mdt_txn_stop_cb(const struct lu_env *env, struct thandle *txn, void *cookie) { struct mdt_device *mdt = cookie; struct mdt_thread_info *mti; struct ptlrpc_request *req; mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key); req = mdt_info_req(mti); if (mti->mti_mdt == NULL || req == NULL) return 0; if (mti->mti_has_trans) { /* XXX: currently there are allowed cases, but the wrong cases * are also possible, so better check is needed here */ CDEBUG(D_INFO, "More than one transaction "LPU64"\n", mti->mti_transno); return 0; } mti->mti_has_trans = 1; spin_lock(&mdt->mdt_lut.lut_translock); if (txn->th_result != 0) { if (mti->mti_transno != 0) { CERROR("Replay transno "LPU64" failed: rc %d\n", mti->mti_transno, txn->th_result); return 0; } } else if (mti->mti_transno == 0) { mti->mti_transno = ++ mdt->mdt_lut.lut_last_transno; } else { /* should be replay */ if (mti->mti_transno > mdt->mdt_lut.lut_last_transno) mdt->mdt_lut.lut_last_transno = mti->mti_transno; } spin_unlock(&mdt->mdt_lut.lut_translock); /* sometimes the reply message has not been successfully packed */ LASSERT(req != NULL && req->rq_repmsg != NULL); /** VBR: set new versions */ if (txn->th_result == 0 && mti->mti_mos != NULL) { dt_version_set(env, mdt_obj2dt(mti->mti_mos), mti->mti_transno, txn); mti->mti_mos = NULL; } /* filling reply data */ CDEBUG(D_INODE, "transno = "LPU64", last_committed = "LPU64"\n", mti->mti_transno, req->rq_export->exp_obd->obd_last_committed); req->rq_transno = mti->mti_transno; lustre_msg_set_transno(req->rq_repmsg, mti->mti_transno); /* if can't add callback, do sync write */ txn->th_sync |= !!tgt_last_commit_cb_add(txn, &mdt->mdt_lut, mti->mti_exp, mti->mti_transno); return mdt_last_rcvd_update(mti, txn); } int mdt_fs_setup(const struct lu_env *env, struct mdt_device *mdt, struct obd_device *obd, struct lustre_sb_info *lsi) { int rc = 0; ENTRY; if (OBD_FAIL_CHECK(OBD_FAIL_MDS_FS_SETUP)) RETURN(-ENOENT); /* prepare transactions callbacks */ mdt->mdt_txn_cb.dtc_txn_start = mdt_txn_start_cb; mdt->mdt_txn_cb.dtc_txn_stop = mdt_txn_stop_cb; mdt->mdt_txn_cb.dtc_txn_commit = NULL; mdt->mdt_txn_cb.dtc_cookie = mdt; mdt->mdt_txn_cb.dtc_tag = LCT_MD_THREAD; CFS_INIT_LIST_HEAD(&mdt->mdt_txn_cb.dtc_linkage); dt_txn_callback_add(mdt->mdt_bottom, &mdt->mdt_txn_cb); rc = mdt_server_data_init(env, mdt, lsi); RETURN(rc); } void mdt_fs_cleanup(const struct lu_env *env, struct mdt_device *mdt) { ENTRY; /* Remove transaction callback */ dt_txn_callback_del(mdt->mdt_bottom, &mdt->mdt_txn_cb); if (mdt->mdt_ck_obj) lu_object_put(env, &mdt->mdt_ck_obj->do_lu); mdt->mdt_ck_obj = NULL; EXIT; } /* reconstruction code */ static void mdt_steal_ack_locks(struct ptlrpc_request *req) { struct ptlrpc_service_part *svcpt; struct obd_export *exp = req->rq_export; cfs_list_t *tmp; struct ptlrpc_reply_state *oldrep; int i; /* CAVEAT EMPTOR: spinlock order */ spin_lock(&exp->exp_lock); cfs_list_for_each (tmp, &exp->exp_outstanding_replies) { oldrep = cfs_list_entry(tmp, struct ptlrpc_reply_state, rs_exp_list); if (oldrep->rs_xid != req->rq_xid) continue; if (oldrep->rs_opc != lustre_msg_get_opc(req->rq_reqmsg)) CERROR ("Resent req xid "LPU64" has mismatched opc: " "new %d old %d\n", req->rq_xid, lustre_msg_get_opc(req->rq_reqmsg), oldrep->rs_opc); svcpt = oldrep->rs_svcpt; spin_lock(&svcpt->scp_rep_lock); cfs_list_del_init (&oldrep->rs_exp_list); CDEBUG(D_HA, "Stealing %d locks from rs %p x"LPD64".t"LPD64 " o%d NID %s\n", oldrep->rs_nlocks, oldrep, oldrep->rs_xid, oldrep->rs_transno, oldrep->rs_opc, libcfs_nid2str(exp->exp_connection->c_peer.nid)); for (i = 0; i < oldrep->rs_nlocks; i++) ptlrpc_save_lock(req, &oldrep->rs_locks[i], oldrep->rs_modes[i], 0); oldrep->rs_nlocks = 0; DEBUG_REQ(D_HA, req, "stole locks for"); spin_lock(&oldrep->rs_lock); ptlrpc_schedule_difficult_reply(oldrep); spin_unlock(&oldrep->rs_lock); spin_unlock(&svcpt->scp_rep_lock); break; } spin_unlock(&exp->exp_lock); } /** * VBR: restore versions */ void mdt_vbr_reconstruct(struct ptlrpc_request *req, struct lsd_client_data *lcd) { __u64 pre_versions[4] = {0}; pre_versions[0] = lcd->lcd_pre_versions[0]; pre_versions[1] = lcd->lcd_pre_versions[1]; pre_versions[2] = lcd->lcd_pre_versions[2]; pre_versions[3] = lcd->lcd_pre_versions[3]; lustre_msg_set_versions(req->rq_repmsg, pre_versions); } void mdt_req_from_lcd(struct ptlrpc_request *req, struct lsd_client_data *lcd) { DEBUG_REQ(D_HA, req, "restoring transno "LPD64"/status %d", lcd->lcd_last_transno, lcd->lcd_last_result); if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE || lustre_msg_get_opc(req->rq_repmsg) == MDS_DONE_WRITING) { req->rq_transno = lcd->lcd_last_close_transno; req->rq_status = lcd->lcd_last_close_result; } else { req->rq_transno = lcd->lcd_last_transno; req->rq_status = lcd->lcd_last_result; mdt_vbr_reconstruct(req, lcd); } if (req->rq_status != 0) req->rq_transno = 0; lustre_msg_set_transno(req->rq_repmsg, req->rq_transno); lustre_msg_set_status(req->rq_repmsg, req->rq_status); DEBUG_REQ(D_RPCTRACE, req, "restoring transno "LPD64"/status %d", req->rq_transno, req->rq_status); mdt_steal_ack_locks(req); } void mdt_reconstruct_generic(struct mdt_thread_info *mti, struct mdt_lock_handle *lhc) { struct ptlrpc_request *req = mdt_info_req(mti); struct tg_export_data *ted = &req->rq_export->exp_target_data; return mdt_req_from_lcd(req, ted->ted_lcd); } static void mdt_reconstruct_create(struct mdt_thread_info *mti, struct mdt_lock_handle *lhc) { struct ptlrpc_request *req = mdt_info_req(mti); struct obd_export *exp = req->rq_export; struct tg_export_data *ted = &exp->exp_target_data; struct mdt_device *mdt = mti->mti_mdt; struct mdt_object *child; struct mdt_body *body; int rc; mdt_req_from_lcd(req, ted->ted_lcd); if (req->rq_status) return; /* if no error, so child was created with requested fid */ child = mdt_object_find(mti->mti_env, mdt, mti->mti_rr.rr_fid2); if (IS_ERR(child)) { rc = PTR_ERR(child); LCONSOLE_WARN("Child "DFID" lookup error %d." " Evicting client %s with export %s.\n", PFID(mdt_object_fid(child)), rc, obd_uuid2str(&exp->exp_client_uuid), obd_export_nid2str(exp)); mdt_export_evict(exp); EXIT; return; } body = req_capsule_server_get(mti->mti_pill, &RMF_MDT_BODY); mti->mti_attr.ma_need = MA_INODE; mti->mti_attr.ma_valid = 0; rc = mdt_attr_get_complex(mti, child, &mti->mti_attr); if (rc == -EREMOTE) { /* object was created on remote server */ req->rq_status = rc; body->valid |= OBD_MD_MDS; } mdt_pack_attr2body(mti, body, &mti->mti_attr.ma_attr, mdt_object_fid(child)); mdt_object_put(mti->mti_env, child); } static void mdt_reconstruct_setattr(struct mdt_thread_info *mti, struct mdt_lock_handle *lhc) { struct ptlrpc_request *req = mdt_info_req(mti); struct obd_export *exp = req->rq_export; struct mdt_export_data *med = &exp->exp_mdt_data; struct mdt_device *mdt = mti->mti_mdt; struct mdt_object *obj; struct mdt_body *body; mdt_req_from_lcd(req, med->med_ted.ted_lcd); if (req->rq_status) return; body = req_capsule_server_get(mti->mti_pill, &RMF_MDT_BODY); obj = mdt_object_find(mti->mti_env, mdt, mti->mti_rr.rr_fid1); if (IS_ERR(obj)) { int rc = PTR_ERR(obj); LCONSOLE_WARN(""DFID" lookup error %d." " Evicting client %s with export %s.\n", PFID(mdt_object_fid(obj)), rc, obd_uuid2str(&exp->exp_client_uuid), obd_export_nid2str(exp)); mdt_export_evict(exp); EXIT; return; } mti->mti_attr.ma_need = MA_INODE; mti->mti_attr.ma_valid = 0; mdt_attr_get_complex(mti, obj, &mti->mti_attr); mdt_pack_attr2body(mti, body, &mti->mti_attr.ma_attr, mdt_object_fid(obj)); if (mti->mti_ioepoch && (mti->mti_ioepoch->flags & MF_EPOCH_OPEN)) { struct mdt_file_data *mfd; struct mdt_body *repbody; repbody = req_capsule_server_get(mti->mti_pill, &RMF_MDT_BODY); repbody->ioepoch = obj->mot_ioepoch; spin_lock(&med->med_open_lock); cfs_list_for_each_entry(mfd, &med->med_open_head, mfd_list) { if (mfd->mfd_xid == req->rq_xid) break; } LASSERT(&mfd->mfd_list != &med->med_open_head); spin_unlock(&med->med_open_lock); repbody->handle.cookie = mfd->mfd_handle.h_cookie; } mdt_object_put(mti->mti_env, obj); } typedef void (*mdt_reconstructor)(struct mdt_thread_info *mti, struct mdt_lock_handle *lhc); static mdt_reconstructor reconstructors[REINT_MAX] = { [REINT_SETATTR] = mdt_reconstruct_setattr, [REINT_CREATE] = mdt_reconstruct_create, [REINT_LINK] = mdt_reconstruct_generic, [REINT_UNLINK] = mdt_reconstruct_generic, [REINT_RENAME] = mdt_reconstruct_generic, [REINT_OPEN] = mdt_reconstruct_open, [REINT_SETXATTR] = mdt_reconstruct_generic }; void mdt_reconstruct(struct mdt_thread_info *mti, struct mdt_lock_handle *lhc) { ENTRY; reconstructors[mti->mti_rr.rr_opcode](mti, lhc); EXIT; }