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, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2014, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/mdt/mdt_recovery.c
38 * Lustre Metadata Target (mdt) recovery-related methods
40 * Author: Huang Hua <huanghua@clusterfs.com>
41 * Author: Pershin Mike <tappro@clusterfs.com>
44 #define DEBUG_SUBSYSTEM S_MDS
46 #include "mdt_internal.h"
48 struct lu_buf *mdt_buf(const struct lu_env *env, void *area, ssize_t len)
51 struct mdt_thread_info *mti;
53 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
60 const struct lu_buf *mdt_buf_const(const struct lu_env *env,
61 const void *area, ssize_t len)
64 struct mdt_thread_info *mti;
66 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
69 buf->lb_buf = (void *)area;
75 * last_rcvd & last_committed update callbacks
77 extern struct lu_context_key mdt_thread_key;
79 /* This callback notifies MDT that transaction was done. This is needed by
80 * mdt_save_lock() only. It is similar to new target code and will be removed
81 * as mdt_save_lock() will be converted to use target structures */
82 static int mdt_txn_stop_cb(const struct lu_env *env,
83 struct thandle *txn, void *cookie)
85 struct mdt_thread_info *mti;
87 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
90 if (mti->mti_has_trans)
91 CDEBUG(D_INFO, "More than one transaction\n");
93 mti->mti_has_trans = 1;
97 int mdt_fs_setup(const struct lu_env *env, struct mdt_device *mdt,
98 struct obd_device *obd, struct lustre_sb_info *lsi)
104 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_FS_SETUP))
107 /* prepare transactions callbacks */
108 mdt->mdt_txn_cb.dtc_txn_start = NULL;
109 mdt->mdt_txn_cb.dtc_txn_stop = mdt_txn_stop_cb;
110 mdt->mdt_txn_cb.dtc_txn_commit = NULL;
111 mdt->mdt_txn_cb.dtc_cookie = NULL;
112 mdt->mdt_txn_cb.dtc_tag = LCT_MD_THREAD;
113 INIT_LIST_HEAD(&mdt->mdt_txn_cb.dtc_linkage);
115 dt_txn_callback_add(mdt->mdt_bottom, &mdt->mdt_txn_cb);
120 void mdt_fs_cleanup(const struct lu_env *env, struct mdt_device *mdt)
124 /* Remove transaction callback */
125 dt_txn_callback_del(mdt->mdt_bottom, &mdt->mdt_txn_cb);
127 lu_object_put(env, &mdt->mdt_ck_obj->do_lu);
128 mdt->mdt_ck_obj = NULL;
132 /* reconstruction code */
133 static void mdt_steal_ack_locks(struct ptlrpc_request *req)
135 struct ptlrpc_service_part *svcpt;
136 struct obd_export *exp = req->rq_export;
137 struct list_head *tmp;
138 struct ptlrpc_reply_state *oldrep;
141 /* CAVEAT EMPTOR: spinlock order */
142 spin_lock(&exp->exp_lock);
143 list_for_each(tmp, &exp->exp_outstanding_replies) {
144 oldrep = list_entry(tmp, struct ptlrpc_reply_state,
147 if (oldrep->rs_xid != req->rq_xid)
150 if (oldrep->rs_opc != lustre_msg_get_opc(req->rq_reqmsg))
151 CERROR ("Resent req xid "LPU64" has mismatched opc: "
152 "new %d old %d\n", req->rq_xid,
153 lustre_msg_get_opc(req->rq_reqmsg),
156 svcpt = oldrep->rs_svcpt;
157 spin_lock(&svcpt->scp_rep_lock);
159 list_del_init(&oldrep->rs_exp_list);
161 CDEBUG(D_HA, "Stealing %d locks from rs %p x"LPD64".t"LPD64
163 oldrep->rs_nlocks, oldrep,
164 oldrep->rs_xid, oldrep->rs_transno, oldrep->rs_opc,
165 libcfs_nid2str(exp->exp_connection->c_peer.nid));
167 for (i = 0; i < oldrep->rs_nlocks; i++)
168 ptlrpc_save_lock(req, &oldrep->rs_locks[i],
169 oldrep->rs_modes[i], 0);
170 oldrep->rs_nlocks = 0;
172 DEBUG_REQ(D_HA, req, "stole locks for");
173 spin_lock(&oldrep->rs_lock);
174 ptlrpc_schedule_difficult_reply(oldrep);
175 spin_unlock(&oldrep->rs_lock);
177 spin_unlock(&svcpt->scp_rep_lock);
180 spin_unlock(&exp->exp_lock);
184 * VBR: restore versions
186 static void mdt_vbr_reconstruct(struct ptlrpc_request *req,
187 struct lsd_client_data *lcd)
189 __u64 pre_versions[4] = {0};
190 pre_versions[0] = lcd->lcd_pre_versions[0];
191 pre_versions[1] = lcd->lcd_pre_versions[1];
192 pre_versions[2] = lcd->lcd_pre_versions[2];
193 pre_versions[3] = lcd->lcd_pre_versions[3];
194 lustre_msg_set_versions(req->rq_repmsg, pre_versions);
197 void mdt_req_from_lcd(struct ptlrpc_request *req, struct lsd_client_data *lcd)
199 DEBUG_REQ(D_HA, req, "restoring transno "LPD64"/status %d",
200 lcd->lcd_last_transno, lcd->lcd_last_result);
202 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE ||
203 lustre_msg_get_opc(req->rq_repmsg) == MDS_DONE_WRITING) {
204 req->rq_transno = lcd->lcd_last_close_transno;
205 req->rq_status = lcd->lcd_last_close_result;
207 req->rq_transno = lcd->lcd_last_transno;
208 req->rq_status = lcd->lcd_last_result;
209 mdt_vbr_reconstruct(req, lcd);
211 if (req->rq_status != 0)
213 lustre_msg_set_transno(req->rq_repmsg, req->rq_transno);
214 lustre_msg_set_status(req->rq_repmsg, req->rq_status);
215 DEBUG_REQ(D_RPCTRACE, req, "restoring transno "LPD64"/status %d",
216 req->rq_transno, req->rq_status);
218 mdt_steal_ack_locks(req);
221 void mdt_reconstruct_generic(struct mdt_thread_info *mti,
222 struct mdt_lock_handle *lhc)
224 struct ptlrpc_request *req = mdt_info_req(mti);
225 struct tg_export_data *ted = &req->rq_export->exp_target_data;
227 return mdt_req_from_lcd(req, ted->ted_lcd);
231 * Generate fake attributes for a non-existing object
233 * While the client was waiting for the reply, the original transaction
234 * got committed and corresponding rep-ack lock got released, then another
235 * client was able to destroy the object. But we still need to send some
236 * attributes back. So we fake them and set nlink=0, so the client will
237 * be able to detect a non-existing object and drop it from the cache
240 * \param[out] ma attributes to fill
242 static void mdt_fake_ma(struct md_attr *ma)
244 ma->ma_valid = MA_INODE;
245 memset(&ma->ma_attr, 0, sizeof(ma->ma_attr));
246 ma->ma_attr.la_valid = LA_NLINK;
247 ma->ma_attr.la_mode = S_IFREG;
250 static void mdt_reconstruct_create(struct mdt_thread_info *mti,
251 struct mdt_lock_handle *lhc)
253 struct ptlrpc_request *req = mdt_info_req(mti);
254 struct obd_export *exp = req->rq_export;
255 struct tg_export_data *ted = &exp->exp_target_data;
256 struct mdt_device *mdt = mti->mti_mdt;
257 struct mdt_object *child;
258 struct mdt_body *body;
261 mdt_req_from_lcd(req, ted->ted_lcd);
265 /* if no error, so child was created with requested fid */
266 child = mdt_object_find(mti->mti_env, mdt, mti->mti_rr.rr_fid2);
269 LCONSOLE_WARN("cannot lookup child "DFID": rc = %d; "
270 "evicting client %s with export %s\n",
271 PFID(mti->mti_rr.rr_fid2), rc,
272 obd_uuid2str(&exp->exp_client_uuid),
273 obd_export_nid2str(exp));
274 mdt_export_evict(exp);
278 body = req_capsule_server_get(mti->mti_pill, &RMF_MDT_BODY);
279 mti->mti_attr.ma_need = MA_INODE;
280 mti->mti_attr.ma_valid = 0;
281 rc = mdt_attr_get_complex(mti, child, &mti->mti_attr);
283 mdt_fake_ma(&mti->mti_attr);
284 } else if (rc == -EREMOTE) {
285 /* object was created on remote server */
286 if (!mdt_is_dne_client(exp))
287 /* Return -EIO for old client */
291 body->mbo_valid |= OBD_MD_MDS;
293 mdt_pack_attr2body(mti, body, &mti->mti_attr.ma_attr,
294 mdt_object_fid(child));
295 mdt_object_put(mti->mti_env, child);
298 static void mdt_reconstruct_setattr(struct mdt_thread_info *mti,
299 struct mdt_lock_handle *lhc)
301 struct ptlrpc_request *req = mdt_info_req(mti);
302 struct obd_export *exp = req->rq_export;
303 struct mdt_export_data *med = &exp->exp_mdt_data;
304 struct mdt_device *mdt = mti->mti_mdt;
305 struct mdt_object *obj;
306 struct mdt_body *body;
309 mdt_req_from_lcd(req, med->med_ted.ted_lcd);
313 body = req_capsule_server_get(mti->mti_pill, &RMF_MDT_BODY);
314 obj = mdt_object_find(mti->mti_env, mdt, mti->mti_rr.rr_fid1);
317 LCONSOLE_WARN("cannot lookup "DFID": rc = %d; "
318 "evicting client %s with export %s\n",
319 PFID(mti->mti_rr.rr_fid1), rc,
320 obd_uuid2str(&exp->exp_client_uuid),
321 obd_export_nid2str(exp));
322 mdt_export_evict(exp);
326 mti->mti_attr.ma_need = MA_INODE;
327 mti->mti_attr.ma_valid = 0;
329 rc = mdt_attr_get_complex(mti, obj, &mti->mti_attr);
331 mdt_fake_ma(&mti->mti_attr);
332 mdt_pack_attr2body(mti, body, &mti->mti_attr.ma_attr,
333 mdt_object_fid(obj));
334 if (mti->mti_ioepoch && (mti->mti_ioepoch->flags & MF_EPOCH_OPEN)) {
335 struct mdt_file_data *mfd;
336 struct mdt_body *repbody;
338 repbody = req_capsule_server_get(mti->mti_pill, &RMF_MDT_BODY);
339 repbody->mbo_ioepoch = obj->mot_ioepoch;
340 spin_lock(&med->med_open_lock);
341 list_for_each_entry(mfd, &med->med_open_head, mfd_list) {
342 if (mfd->mfd_xid == req->rq_xid)
345 LASSERT(&mfd->mfd_list != &med->med_open_head);
346 spin_unlock(&med->med_open_lock);
347 repbody->mbo_handle.cookie = mfd->mfd_handle.h_cookie;
350 mdt_object_put(mti->mti_env, obj);
353 typedef void (*mdt_reconstructor)(struct mdt_thread_info *mti,
354 struct mdt_lock_handle *lhc);
356 static mdt_reconstructor reconstructors[REINT_MAX] = {
357 [REINT_SETATTR] = mdt_reconstruct_setattr,
358 [REINT_CREATE] = mdt_reconstruct_create,
359 [REINT_LINK] = mdt_reconstruct_generic,
360 [REINT_UNLINK] = mdt_reconstruct_generic,
361 [REINT_RENAME] = mdt_reconstruct_generic,
362 [REINT_OPEN] = mdt_reconstruct_open,
363 [REINT_SETXATTR] = mdt_reconstruct_generic
366 void mdt_reconstruct(struct mdt_thread_info *mti,
367 struct mdt_lock_handle *lhc)
370 reconstructors[mti->mti_rr.rr_opcode](mti, lhc);