1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
32 * Copyright (c) 2011 Whamcloud, Inc.
36 * This file is part of Lustre, http://www.lustre.org/
37 * Lustre is a trademark of Sun Microsystems, Inc.
39 * lustre/mdt/mdt_recovery.c
41 * Lustre Metadata Target (mdt) recovery-related methods
43 * Author: Huang Hua <huanghua@clusterfs.com>
44 * Author: Pershin Mike <tappro@clusterfs.com>
48 # define EXPORT_SYMTAB
50 #define DEBUG_SUBSYSTEM S_MDS
52 #include "mdt_internal.h"
54 static int mdt_server_data_update(const struct lu_env *env,
55 struct mdt_device *mdt);
57 struct lu_buf *mdt_buf(const struct lu_env *env, void *area, ssize_t len)
60 struct mdt_thread_info *mti;
62 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
69 const struct lu_buf *mdt_buf_const(const struct lu_env *env,
70 const void *area, ssize_t len)
73 struct mdt_thread_info *mti;
75 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
78 buf->lb_buf = (void *)area;
83 static inline int mdt_trans_credit_get(const struct lu_env *env,
84 struct mdt_device *mdt,
87 struct dt_device *dev = mdt->mdt_bottom;
90 case MDT_TXN_CAPA_KEYS_WRITE_OP:
91 case MDT_TXN_LAST_RCVD_WRITE_OP:
92 cr = dev->dd_ops->dt_credit_get(env,
102 void mdt_trans_credit_init(const struct lu_env *env,
103 struct mdt_device *mdt,
106 struct mdt_thread_info *mti;
110 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
111 p = &mti->mti_txn_param;
113 cr = mdt_trans_credit_get(env, mdt, op);
114 txn_param_init(p, cr);
117 struct thandle* mdt_trans_start(const struct lu_env *env,
118 struct mdt_device *mdt)
120 struct mdt_thread_info *mti;
123 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
124 p = &mti->mti_txn_param;
126 /* export can require sync operations */
127 if (mti->mti_exp != NULL)
128 p->tp_sync = mti->mti_exp->exp_need_sync;
130 return mdt->mdt_bottom->dd_ops->dt_trans_start(env, mdt->mdt_bottom, p);
133 void mdt_trans_stop(const struct lu_env *env,
134 struct mdt_device *mdt, struct thandle *th)
136 mdt->mdt_bottom->dd_ops->dt_trans_stop(env, th);
139 static inline int mdt_last_rcvd_header_read(const struct lu_env *env,
140 struct mdt_device *mdt)
142 struct mdt_thread_info *mti;
145 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
148 rc = dt_record_read(env, mdt->mdt_lut.lut_last_rcvd,
149 mdt_buf(env, &mti->mti_lsd, sizeof(mti->mti_lsd)),
152 lsd_le_to_cpu(&mti->mti_lsd, &mdt->mdt_lut.lut_lsd);
154 CDEBUG(D_INFO, "read last_rcvd header rc = %d, uuid = %s, "
155 "last_transno = "LPU64"\n", rc, mdt->mdt_lut.lut_lsd.lsd_uuid,
156 mdt->mdt_lut.lut_lsd.lsd_last_transno);
160 static int mdt_last_rcvd_header_write(const struct lu_env *env,
161 struct mdt_device *mdt,
164 struct mdt_thread_info *mti;
168 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
171 lsd_cpu_to_le(&mdt->mdt_lut.lut_lsd, &mti->mti_lsd);
173 rc = dt_record_write(env, mdt->mdt_lut.lut_last_rcvd,
174 mdt_buf_const(env, &mti->mti_lsd,
175 sizeof(mti->mti_lsd)),
178 CDEBUG(D_INFO, "write last_rcvd header rc = %d, uuid = %s, "
179 "last_transno = "LPU64"\n", rc, mdt->mdt_lut.lut_lsd.lsd_uuid,
180 mdt->mdt_lut.lut_lsd.lsd_last_transno);
185 static int mdt_last_rcvd_read(const struct lu_env *env, struct mdt_device *mdt,
186 struct lsd_client_data *lcd, loff_t *off,
189 struct mdt_thread_info *mti;
190 struct lsd_client_data *tmp;
193 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
195 rc = dt_record_read(env, mdt->mdt_lut.lut_last_rcvd,
196 mdt_buf(env, tmp, sizeof(*tmp)), off);
198 check_lcd(mdt2obd_dev(mdt)->obd_name, index, tmp);
199 lcd_le_to_cpu(tmp, lcd);
202 CDEBUG(D_INFO, "read lcd @%d rc = %d, uuid = %s, last_transno = "LPU64
203 ", last_xid = "LPU64", last_result = %u, last_data = %u, "
204 "last_close_transno = "LPU64", last_close_xid = "LPU64", "
205 "last_close_result = %u\n", (int)(*off - sizeof(*tmp)),
206 rc, lcd->lcd_uuid, lcd->lcd_last_transno, lcd->lcd_last_xid,
207 lcd->lcd_last_result, lcd->lcd_last_data,
208 lcd->lcd_last_close_transno, lcd->lcd_last_close_xid,
209 lcd->lcd_last_close_result);
213 static int mdt_last_rcvd_write(const struct lu_env *env,
214 struct mdt_device *mdt,
215 struct lsd_client_data *lcd,
216 loff_t *off, struct thandle *th)
218 struct mdt_thread_info *mti;
219 struct lsd_client_data *tmp;
223 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
226 lcd_cpu_to_le(lcd, tmp);
228 rc = dt_record_write(env, mdt->mdt_lut.lut_last_rcvd,
229 mdt_buf_const(env, tmp, sizeof(*tmp)), off, th);
231 CDEBUG(D_INFO, "write lcd @%d rc = %d, uuid = %s, last_transno = "LPU64
232 ", last_xid = "LPU64", last_result = %u, last_data = %u, "
233 "last_close_transno = "LPU64", last_close_xid = "LPU64" ,"
234 "last_close_result = %u\n", (int)(*off - sizeof(*tmp)),
235 rc, lcd->lcd_uuid, lcd->lcd_last_transno, lcd->lcd_last_xid,
236 lcd->lcd_last_result, lcd->lcd_last_data,
237 lcd->lcd_last_close_transno, lcd->lcd_last_close_xid,
238 lcd->lcd_last_close_result);
242 static int mdt_clients_data_init(const struct lu_env *env,
243 struct mdt_device *mdt,
244 unsigned long last_size)
246 struct lr_server_data *lsd = &mdt->mdt_lut.lut_lsd;
247 struct lsd_client_data *lcd;
248 struct obd_device *obd = mdt2obd_dev(mdt);
258 /* When we do a clean MDS shutdown, we save the last_transno into
259 * the header. If we find clients with higher last_transno values
260 * then those clients may need recovery done. */
261 LASSERT(cfs_atomic_read(&obd->obd_req_replay_clients) == 0);
262 for (cl_idx = 0, off = lsd->lsd_client_start;
263 off < last_size; cl_idx++) {
265 struct obd_export *exp;
266 struct mdt_thread_info *mti;
268 off = lsd->lsd_client_start +
269 cl_idx * lsd->lsd_client_size;
271 rc = mdt_last_rcvd_read(env, mdt, lcd, &off, cl_idx);
273 CERROR("error reading MDS %s idx %d, off %llu: rc %d\n",
274 LAST_RCVD, cl_idx, off, rc);
276 break; /* read error shouldn't cause startup to fail */
279 if (lcd->lcd_uuid[0] == '\0') {
280 CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
285 last_transno = lcd_last_transno(lcd);
287 /* These exports are cleaned up by mdt_obd_disconnect(), so
288 * they need to be set up like real exports as
289 * mdt_obd_connect() does.
291 CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64
292 " srv lr: "LPU64" lx: "LPU64"\n", lcd->lcd_uuid, cl_idx,
293 last_transno, lsd->lsd_last_transno,
296 exp = class_new_export(obd, (struct obd_uuid *)lcd->lcd_uuid);
298 if (PTR_ERR(exp) == -EALREADY) {
299 /* export already exists, zero out this one */
300 CERROR("Duplicate export %s!\n", lcd->lcd_uuid);
303 GOTO(err_client, rc = PTR_ERR(exp));
306 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
307 LASSERT(mti != NULL);
309 /* copy on-disk lcd to the export */
310 *exp->exp_target_data.ted_lcd = *lcd;
311 rc = mdt_client_add(env, mdt, cl_idx);
312 /* can't fail existing */
313 LASSERTF(rc == 0, "rc = %d\n", rc);
314 /* VBR: set export last committed version */
315 exp->exp_last_committed = last_transno;
316 cfs_spin_lock(&exp->exp_lock);
317 exp->exp_connecting = 0;
318 exp->exp_in_recovery = 0;
319 cfs_spin_unlock(&exp->exp_lock);
320 obd->obd_max_recoverable_clients++;
321 class_export_put(exp);
323 CDEBUG(D_OTHER, "client at idx %d has last_transno="LPU64"\n",
324 cl_idx, last_transno);
325 /* protect __u64 value update */
326 cfs_spin_lock(&mdt->mdt_lut.lut_translock);
327 mdt->mdt_lut.lut_last_transno = max(last_transno,
328 mdt->mdt_lut.lut_last_transno);
329 cfs_spin_unlock(&mdt->mdt_lut.lut_translock);
337 static int mdt_server_data_init(const struct lu_env *env,
338 struct mdt_device *mdt,
339 struct lustre_sb_info *lsi)
341 struct lr_server_data *lsd = &mdt->mdt_lut.lut_lsd;
342 struct lsd_client_data *lcd = NULL;
343 struct obd_device *obd = mdt2obd_dev(mdt);
344 struct mdt_thread_info *mti;
345 struct dt_object *obj;
347 struct lustre_disk_data *ldd;
348 unsigned long last_rcvd_size;
353 /* ensure padding in the struct is the correct size */
354 CLASSERT(offsetof(struct lr_server_data, lsd_padding) +
355 sizeof(lsd->lsd_padding) == LR_SERVER_SIZE);
356 CLASSERT(offsetof(struct lsd_client_data, lcd_padding) +
357 sizeof(lcd->lcd_padding) == LR_CLIENT_SIZE);
359 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
360 LASSERT(mti != NULL);
361 la = &mti->mti_attr.ma_attr;
363 obj = mdt->mdt_lut.lut_last_rcvd;
364 rc = obj->do_ops->do_attr_get(env, obj, la, BYPASS_CAPA);
368 last_rcvd_size = (unsigned long)la->la_size;
370 if (last_rcvd_size == 0) {
371 LCONSOLE_WARN("%s: new disk, initializing\n", obd->obd_name);
373 memcpy(lsd->lsd_uuid, obd->obd_uuid.uuid,
374 sizeof(lsd->lsd_uuid));
375 lsd->lsd_last_transno = 0;
376 lsd->lsd_mount_count = 0;
377 lsd->lsd_server_size = LR_SERVER_SIZE;
378 lsd->lsd_client_start = LR_CLIENT_START;
379 lsd->lsd_client_size = LR_CLIENT_SIZE;
380 lsd->lsd_feature_compat = OBD_COMPAT_MDT;
381 lsd->lsd_feature_rocompat = OBD_ROCOMPAT_LOVOBJID;
382 lsd->lsd_feature_incompat = OBD_INCOMPAT_MDT |
383 OBD_INCOMPAT_COMMON_LR;
385 LCONSOLE_WARN("%s: used disk, loading\n", obd->obd_name);
386 rc = mdt_last_rcvd_header_read(env, mdt);
388 CERROR("error reading MDS %s: rc %d\n", LAST_RCVD, rc);
391 if (strcmp(lsd->lsd_uuid, obd->obd_uuid.uuid) != 0) {
392 LCONSOLE_ERROR_MSG(0x157, "Trying to start OBD %s using"
393 "the wrong disk %s. Were the /dev/ "
394 "assignments rearranged?\n",
395 obd->obd_uuid.uuid, lsd->lsd_uuid);
396 GOTO(out, rc = -EINVAL);
398 lsd->lsd_feature_compat |= OBD_COMPAT_MDT;
399 lsd->lsd_feature_incompat |= OBD_INCOMPAT_MDT |
400 OBD_INCOMPAT_COMMON_LR;
402 mount_count = lsd->lsd_mount_count;
406 if (lsd->lsd_feature_incompat & ~MDT_INCOMPAT_SUPP) {
407 CERROR("%s: unsupported incompat filesystem feature(s) %x\n",
409 lsd->lsd_feature_incompat & ~MDT_INCOMPAT_SUPP);
410 GOTO(out, rc = -EINVAL);
412 if (lsd->lsd_feature_rocompat & ~MDT_ROCOMPAT_SUPP) {
413 CERROR("%s: unsupported read-only filesystem feature(s) %x\n",
415 lsd->lsd_feature_rocompat & ~MDT_ROCOMPAT_SUPP);
416 /* XXX: Do something like remount filesystem read-only */
417 GOTO(out, rc = -EINVAL);
419 /** Interop: evict all clients at first boot with 1.8 last_rcvd */
420 if (!(lsd->lsd_feature_compat & OBD_COMPAT_20)) {
421 if (last_rcvd_size > lsd->lsd_client_start) {
422 LCONSOLE_WARN("Mounting %s at first time on 1.8 FS, "
423 "remove all clients for interop needs\n",
425 simple_truncate(lsi->lsi_srv_mnt->mnt_sb->s_root,
426 lsi->lsi_srv_mnt, LAST_RCVD,
427 lsd->lsd_client_start);
428 last_rcvd_size = lsd->lsd_client_start;
430 /** set 2.0 flag to upgrade/downgrade between 1.8 and 2.0 */
431 lsd->lsd_feature_compat |= OBD_COMPAT_20;
434 if (ldd->ldd_flags & LDD_F_IAM_DIR)
435 lsd->lsd_feature_incompat |= OBD_INCOMPAT_IAM_DIR;
437 lsd->lsd_feature_incompat |= OBD_INCOMPAT_FID;
439 cfs_spin_lock(&mdt->mdt_lut.lut_translock);
440 mdt->mdt_lut.lut_last_transno = lsd->lsd_last_transno;
441 cfs_spin_unlock(&mdt->mdt_lut.lut_translock);
443 CDEBUG(D_INODE, "========BEGIN DUMPING LAST_RCVD========\n");
444 CDEBUG(D_INODE, "%s: server last_transno: "LPU64"\n",
445 obd->obd_name, mdt->mdt_lut.lut_last_transno);
446 CDEBUG(D_INODE, "%s: server mount_count: "LPU64"\n",
447 obd->obd_name, mount_count + 1);
448 CDEBUG(D_INODE, "%s: server data size: %u\n",
449 obd->obd_name, lsd->lsd_server_size);
450 CDEBUG(D_INODE, "%s: per-client data start: %u\n",
451 obd->obd_name, lsd->lsd_client_start);
452 CDEBUG(D_INODE, "%s: per-client data size: %u\n",
453 obd->obd_name, lsd->lsd_client_size);
454 CDEBUG(D_INODE, "%s: last_rcvd size: %lu\n",
455 obd->obd_name, last_rcvd_size);
456 CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", obd->obd_name,
457 last_rcvd_size <= lsd->lsd_client_start ? 0 :
458 (last_rcvd_size - lsd->lsd_client_start) /
459 lsd->lsd_client_size);
460 CDEBUG(D_INODE, "========END DUMPING LAST_RCVD========\n");
462 if (!lsd->lsd_server_size || !lsd->lsd_client_start ||
463 !lsd->lsd_client_size) {
464 CERROR("Bad last_rcvd contents!\n");
465 GOTO(out, rc = -EINVAL);
468 rc = mdt_clients_data_init(env, mdt, last_rcvd_size);
470 GOTO(err_client, rc);
472 cfs_spin_lock(&mdt->mdt_lut.lut_translock);
473 /* obd_last_committed is used for compatibility
474 * with other lustre recovery code */
475 obd->obd_last_committed = mdt->mdt_lut.lut_last_transno;
476 cfs_spin_unlock(&mdt->mdt_lut.lut_translock);
478 obd->u.obt.obt_mount_count = mount_count + 1;
479 obd->u.obt.obt_instance = (__u32)obd->u.obt.obt_mount_count;
480 lsd->lsd_mount_count = obd->u.obt.obt_mount_count;
482 /* save it, so mount count and last_transno is current */
483 rc = mdt_server_data_update(env, mdt);
485 GOTO(err_client, rc);
490 class_disconnect_exports(obd);
495 static int mdt_server_data_update(const struct lu_env *env,
496 struct mdt_device *mdt)
498 struct mdt_thread_info *mti;
502 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
504 mdt_trans_credit_init(env, mdt, MDT_TXN_LAST_RCVD_WRITE_OP);
505 th = mdt_trans_start(env, mdt);
509 CDEBUG(D_SUPER, "MDS mount_count is "LPU64", last_transno is "LPU64"\n",
510 mdt->mdt_lut.lut_obd->u.obt.obt_mount_count,
511 mdt->mdt_lut.lut_last_transno);
513 cfs_spin_lock(&mdt->mdt_lut.lut_translock);
514 mdt->mdt_lut.lut_lsd.lsd_last_transno = mdt->mdt_lut.lut_last_transno;
515 cfs_spin_unlock(&mdt->mdt_lut.lut_translock);
517 rc = mdt_last_rcvd_header_write(env, mdt, th);
518 mdt_trans_stop(env, mdt, th);
523 int mdt_client_new(const struct lu_env *env, struct mdt_device *mdt)
525 unsigned long *bitmap = mdt->mdt_lut.lut_client_bitmap;
526 struct mdt_thread_info *mti;
527 struct tg_export_data *ted;
528 struct lr_server_data *lsd = &mdt->mdt_lut.lut_lsd;
529 struct obd_device *obd = mdt2obd_dev(mdt);
536 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
537 LASSERT(mti != NULL);
539 ted = &mti->mti_exp->exp_target_data;
541 LASSERT(bitmap != NULL);
542 if (!strcmp(ted->ted_lcd->lcd_uuid, obd->obd_uuid.uuid))
545 /* the bitmap operations can handle cl_idx > sizeof(long) * 8, so
546 * there's no need for extra complication here
548 cfs_spin_lock(&mdt->mdt_lut.lut_client_bitmap_lock);
549 cl_idx = cfs_find_first_zero_bit(bitmap, LR_MAX_CLIENTS);
550 if (cl_idx >= LR_MAX_CLIENTS ||
551 OBD_FAIL_CHECK(OBD_FAIL_MDS_CLIENT_ADD)) {
552 CERROR("no room for %u clients - fix LR_MAX_CLIENTS\n",
554 cfs_spin_unlock(&mdt->mdt_lut.lut_client_bitmap_lock);
557 cfs_set_bit(cl_idx, bitmap);
558 cfs_spin_unlock(&mdt->mdt_lut.lut_client_bitmap_lock);
560 CDEBUG(D_INFO, "client at idx %d with UUID '%s' added\n",
561 cl_idx, ted->ted_lcd->lcd_uuid);
563 ted->ted_lr_idx = cl_idx;
564 ted->ted_lr_off = lsd->lsd_client_start +
565 (cl_idx * lsd->lsd_client_size);
566 cfs_init_mutex(&ted->ted_lcd_lock);
568 LASSERTF(ted->ted_lr_off > 0, "ted_lr_off = %llu\n", ted->ted_lr_off);
570 /* Write new client data. */
571 off = ted->ted_lr_off;
573 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_CLIENT_ADD))
576 mdt_trans_credit_init(env, mdt, MDT_TXN_LAST_RCVD_WRITE_OP);
578 th = mdt_trans_start(env, mdt);
583 * Until this operations will be committed the sync is needed
584 * for this export. This should be done _after_ starting the
585 * transaction so that many connecting clients will not bring
586 * server down with lots of sync writes.
588 mdt_trans_add_cb(th, lut_cb_client, class_export_cb_get(mti->mti_exp));
589 cfs_spin_lock(&mti->mti_exp->exp_lock);
590 mti->mti_exp->exp_need_sync = 1;
591 cfs_spin_unlock(&mti->mti_exp->exp_lock);
593 rc = mdt_last_rcvd_write(env, mdt, ted->ted_lcd, &off, th);
594 CDEBUG(D_INFO, "wrote client lcd at idx %u off %llu (len %u)\n",
595 cl_idx, ted->ted_lr_off, (int)sizeof(*(ted->ted_lcd)));
596 mdt_trans_stop(env, mdt, th);
601 /* Add client data to the MDS. We use a bitmap to locate a free space
602 * in the last_rcvd file if cl_off is -1 (i.e. a new client).
603 * Otherwise, we just have to read the data from the last_rcvd file and
604 * we know its offset.
606 * It should not be possible to fail adding an existing client - otherwise
607 * mdt_init_server_data() callsite needs to be fixed.
609 int mdt_client_add(const struct lu_env *env,
610 struct mdt_device *mdt, int cl_idx)
612 struct mdt_thread_info *mti;
613 struct tg_export_data *ted;
614 unsigned long *bitmap = mdt->mdt_lut.lut_client_bitmap;
615 struct obd_device *obd = mdt2obd_dev(mdt);
616 struct lr_server_data *lsd = &mdt->mdt_lut.lut_lsd;
620 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
621 LASSERT(mti != NULL);
623 ted = &mti->mti_exp->exp_target_data;
625 LASSERT(bitmap != NULL);
626 LASSERTF(cl_idx >= 0, "%d\n", cl_idx);
628 if (!strcmp(ted->ted_lcd->lcd_uuid, obd->obd_uuid.uuid))
631 cfs_spin_lock(&mdt->mdt_lut.lut_client_bitmap_lock);
632 if (cfs_test_and_set_bit(cl_idx, bitmap)) {
633 CERROR("MDS client %d: bit already set in bitmap!!\n",
637 cfs_spin_unlock(&mdt->mdt_lut.lut_client_bitmap_lock);
639 CDEBUG(D_INFO, "client at idx %d with UUID '%s' added\n",
640 cl_idx, ted->ted_lcd->lcd_uuid);
642 ted->ted_lr_idx = cl_idx;
643 ted->ted_lr_off = lsd->lsd_client_start +
644 (cl_idx * lsd->lsd_client_size);
645 cfs_init_mutex(&ted->ted_lcd_lock);
647 LASSERTF(ted->ted_lr_off > 0, "ted_lr_off = %llu\n", ted->ted_lr_off);
652 int mdt_client_del(const struct lu_env *env, struct mdt_device *mdt)
654 struct mdt_thread_info *mti;
655 struct tg_export_data *ted;
656 struct obd_device *obd = mdt2obd_dev(mdt);
657 struct obd_export *exp;
663 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
664 LASSERT(mti != NULL);
667 ted = &exp->exp_target_data;
671 /* XXX: If lcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
672 if (!strcmp(ted->ted_lcd->lcd_uuid, obd->obd_uuid.uuid))
675 CDEBUG(D_INFO, "freeing client at idx %u, offset %lld\n",
676 ted->ted_lr_idx, ted->ted_lr_off);
678 off = ted->ted_lr_off;
681 * Don't clear ted_lr_idx here as it is likely also unset. At worst we
682 * leak a client slot that will be cleaned on the next recovery.
685 CERROR("client idx %d has offset %lld\n",
686 ted->ted_lr_idx, off);
687 GOTO(free, rc = -EINVAL);
691 * Clear the bit _after_ zeroing out the client so we don't race with
692 * mdt_client_add and zero out new clients.
694 if (!cfs_test_bit(ted->ted_lr_idx, mdt->mdt_lut.lut_client_bitmap)) {
695 CERROR("MDT client %u: bit already clear in bitmap!!\n",
700 /* Make sure the server's last_transno is up to date.
701 * This should be done before zeroing client slot so last_transno will
702 * be in server data or in client data in case of failure */
703 mdt_server_data_update(env, mdt);
705 mdt_trans_credit_init(env, mdt, MDT_TXN_LAST_RCVD_WRITE_OP);
706 th = mdt_trans_start(env, mdt);
708 GOTO(free, rc = PTR_ERR(th));
710 cfs_mutex_down(&ted->ted_lcd_lock);
711 memset(ted->ted_lcd->lcd_uuid, 0, sizeof ted->ted_lcd->lcd_uuid);
712 rc = mdt_last_rcvd_write(env, mdt, ted->ted_lcd, &off, th);
713 cfs_mutex_up(&ted->ted_lcd_lock);
714 mdt_trans_stop(env, mdt, th);
716 CDEBUG(rc == 0 ? D_INFO : D_ERROR, "Zeroing out client idx %u in "
717 "%s, rc %d\n", ted->ted_lr_idx, LAST_RCVD, rc);
724 * last_rcvd & last_committed update callbacks
726 static int mdt_last_rcvd_update(struct mdt_thread_info *mti,
729 struct mdt_device *mdt = mti->mti_mdt;
730 struct ptlrpc_request *req = mdt_info_req(mti);
731 struct tg_export_data *ted;
732 struct lsd_client_data *lcd;
735 __s32 rc = th->th_result;
739 LASSERT(req->rq_export);
741 ted = &req->rq_export->exp_target_data;
744 cfs_mutex_down(&ted->ted_lcd_lock);
746 /* if the export has already been disconnected, we have no last_rcvd slot,
747 * update server data with latest transno then */
749 cfs_mutex_up(&ted->ted_lcd_lock);
750 CWARN("commit transaction for disconnected client %s: rc %d\n",
751 req->rq_export->exp_client_uuid.uuid, rc);
752 err = mdt_last_rcvd_header_write(mti->mti_env, mdt, th);
756 off = ted->ted_lr_off;
757 LASSERT(ergo(mti->mti_transno == 0, rc != 0));
758 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE ||
759 lustre_msg_get_opc(req->rq_reqmsg) == MDS_DONE_WRITING) {
760 if (mti->mti_transno != 0) {
761 if (lcd->lcd_last_close_transno > mti->mti_transno) {
762 CERROR("Trying to overwrite bigger transno:"
763 "on-disk: "LPU64", new: "LPU64" "
764 "replay: %d. see LU-617.\n",
765 lcd->lcd_last_close_transno,
766 mti->mti_transno, req_is_replay(req));
767 if (req_is_replay(req)) {
768 cfs_spin_lock(&req->rq_export->exp_lock);
769 req->rq_export->exp_vbr_failed = 1;
770 cfs_spin_unlock(&req->rq_export->exp_lock);
772 cfs_mutex_up(&ted->ted_lcd_lock);
773 RETURN(req_is_replay(req) ? -EOVERFLOW : 0);
775 lcd->lcd_last_close_transno = mti->mti_transno;
777 lcd->lcd_last_close_xid = req->rq_xid;
778 lcd->lcd_last_close_result = rc;
780 /* VBR: save versions in last_rcvd for reconstruct. */
781 __u64 *pre_versions = lustre_msg_get_versions(req->rq_repmsg);
783 lcd->lcd_pre_versions[0] = pre_versions[0];
784 lcd->lcd_pre_versions[1] = pre_versions[1];
785 lcd->lcd_pre_versions[2] = pre_versions[2];
786 lcd->lcd_pre_versions[3] = pre_versions[3];
788 if (mti->mti_transno != 0) {
789 if (lcd->lcd_last_transno > mti->mti_transno) {
790 CERROR("Trying to overwrite bigger transno:"
791 "on-disk: "LPU64", new: "LPU64" "
792 "replay: %d. see LU-617.\n",
793 lcd->lcd_last_transno,
794 mti->mti_transno, req_is_replay(req));
795 if (req_is_replay(req)) {
796 cfs_spin_lock(&req->rq_export->exp_lock);
797 req->rq_export->exp_vbr_failed = 1;
798 cfs_spin_unlock(&req->rq_export->exp_lock);
800 cfs_mutex_up(&ted->ted_lcd_lock);
801 RETURN(req_is_replay(req) ? -EOVERFLOW : 0);
803 lcd->lcd_last_transno = mti->mti_transno;
805 lcd->lcd_last_xid = req->rq_xid;
806 lcd->lcd_last_result = rc;
807 /*XXX: save intent_disposition in mdt_thread_info?
808 * also there is bug - intent_dispostion is __u64,
809 * see struct ldlm_reply->lock_policy_res1; */
810 lcd->lcd_last_data = mti->mti_opdata;
814 CERROR("client idx %d has offset %lld\n", ted->ted_lr_idx, off);
817 err = mdt_last_rcvd_write(mti->mti_env, mdt, lcd, &off, th);
819 cfs_mutex_up(&ted->ted_lcd_lock);
823 extern struct lu_context_key mdt_thread_key;
825 /* add credits for last_rcvd update */
826 static int mdt_txn_start_cb(const struct lu_env *env,
827 struct txn_param *param, void *cookie)
829 struct mdt_device *mdt = cookie;
831 param->tp_credits += mdt_trans_credit_get(env, mdt,
832 MDT_TXN_LAST_RCVD_WRITE_OP);
836 /* Set new object versions */
837 static void mdt_version_set(struct mdt_thread_info *info)
839 if (info->mti_mos != NULL) {
840 mo_version_set(info->mti_env, mdt_object_child(info->mti_mos),
842 info->mti_mos = NULL;
846 /* Update last_rcvd records with latests transaction data */
847 static int mdt_txn_stop_cb(const struct lu_env *env,
848 struct thandle *txn, void *cookie)
850 struct mdt_device *mdt = cookie;
851 struct mdt_txn_info *txi;
852 struct mdt_thread_info *mti;
853 struct ptlrpc_request *req;
855 /* transno in two contexts - for commit_cb and for thread */
856 txi = lu_context_key_get(&txn->th_ctx, &mdt_txn_key);
857 mti = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
858 req = mdt_info_req(mti);
860 if (mti->mti_mdt == NULL || req == NULL || mti->mti_no_need_trans) {
861 txi->txi_transno = 0;
862 mti->mti_no_need_trans = 0;
866 if (mti->mti_has_trans) {
867 /* XXX: currently there are allowed cases, but the wrong cases
868 * are also possible, so better check is needed here */
869 CDEBUG(D_INFO, "More than one transaction "LPU64"\n",
874 mti->mti_has_trans = 1;
875 cfs_spin_lock(&mdt->mdt_lut.lut_translock);
876 if (txn->th_result != 0) {
877 if (mti->mti_transno != 0) {
878 CERROR("Replay transno "LPU64" failed: rc %d\n",
879 mti->mti_transno, txn->th_result);
881 } else if (mti->mti_transno == 0) {
882 mti->mti_transno = ++ mdt->mdt_lut.lut_last_transno;
884 /* should be replay */
885 if (mti->mti_transno > mdt->mdt_lut.lut_last_transno)
886 mdt->mdt_lut.lut_last_transno = mti->mti_transno;
888 cfs_spin_unlock(&mdt->mdt_lut.lut_translock);
889 /* sometimes the reply message has not been successfully packed */
890 LASSERT(req != NULL && req->rq_repmsg != NULL);
892 /** VBR: set new versions */
893 if (txn->th_result == 0)
894 mdt_version_set(mti);
896 /* filling reply data */
897 CDEBUG(D_INODE, "transno = "LPU64", last_committed = "LPU64"\n",
898 mti->mti_transno, req->rq_export->exp_obd->obd_last_committed);
900 req->rq_transno = mti->mti_transno;
901 lustre_msg_set_transno(req->rq_repmsg, mti->mti_transno);
902 /* save transno for the commit callback */
903 txi->txi_transno = mti->mti_transno;
905 /* add separate commit callback for transaction handling because we need
906 * export as parameter */
907 mdt_trans_add_cb(txn, lut_cb_last_committed,
908 class_export_cb_get(mti->mti_exp));
910 return mdt_last_rcvd_update(mti, txn);
913 /* commit callback, need to update last_committed value */
914 static int mdt_txn_commit_cb(const struct lu_env *env,
915 struct thandle *txn, void *cookie)
917 struct mdt_device *mdt = cookie;
918 struct mdt_txn_info *txi;
921 txi = lu_context_key_get(&txn->th_ctx, &mdt_txn_key);
923 /* iterate through all additional callbacks */
924 for (i = 0; i < txi->txi_cb_count; i++) {
925 txi->txi_cb[i].lut_cb_func(&mdt->mdt_lut, txi->txi_transno,
926 txi->txi_cb[i].lut_cb_data, 0);
931 int mdt_fs_setup(const struct lu_env *env, struct mdt_device *mdt,
932 struct obd_device *obd,
933 struct lustre_sb_info *lsi)
940 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_FS_SETUP))
943 /* prepare transactions callbacks */
944 mdt->mdt_txn_cb.dtc_txn_start = mdt_txn_start_cb;
945 mdt->mdt_txn_cb.dtc_txn_stop = mdt_txn_stop_cb;
946 mdt->mdt_txn_cb.dtc_txn_commit = mdt_txn_commit_cb;
947 mdt->mdt_txn_cb.dtc_cookie = mdt;
948 mdt->mdt_txn_cb.dtc_tag = LCT_MD_THREAD;
949 CFS_INIT_LIST_HEAD(&mdt->mdt_txn_cb.dtc_linkage);
951 dt_txn_callback_add(mdt->mdt_bottom, &mdt->mdt_txn_cb);
953 rc = mdt_server_data_init(env, mdt, lsi);
957 o = dt_store_open(env, mdt->mdt_bottom, "", CAPA_KEYS, &fid);
960 rc = mdt_capa_keys_init(env, mdt);
962 GOTO(put_ck_object, rc);
965 CERROR("cannot open %s: rc = %d\n", CAPA_KEYS, rc);
966 GOTO(disconnect_exports, rc);
971 lu_object_put(env, &o->do_lu);
972 mdt->mdt_ck_obj = NULL;
974 class_disconnect_exports(obd);
978 void mdt_fs_cleanup(const struct lu_env *env, struct mdt_device *mdt)
982 /* Remove transaction callback */
983 dt_txn_callback_del(mdt->mdt_bottom, &mdt->mdt_txn_cb);
985 lu_object_put(env, &mdt->mdt_ck_obj->do_lu);
986 mdt->mdt_ck_obj = NULL;
990 /* reconstruction code */
991 static void mdt_steal_ack_locks(struct ptlrpc_request *req)
993 struct obd_export *exp = req->rq_export;
995 struct ptlrpc_reply_state *oldrep;
996 struct ptlrpc_service *svc;
999 /* CAVEAT EMPTOR: spinlock order */
1000 cfs_spin_lock(&exp->exp_lock);
1001 cfs_list_for_each (tmp, &exp->exp_outstanding_replies) {
1002 oldrep = cfs_list_entry(tmp, struct ptlrpc_reply_state,
1005 if (oldrep->rs_xid != req->rq_xid)
1008 if (oldrep->rs_opc != lustre_msg_get_opc(req->rq_reqmsg))
1009 CERROR ("Resent req xid "LPU64" has mismatched opc: "
1010 "new %d old %d\n", req->rq_xid,
1011 lustre_msg_get_opc(req->rq_reqmsg),
1014 svc = oldrep->rs_service;
1015 cfs_spin_lock (&svc->srv_rs_lock);
1017 cfs_list_del_init (&oldrep->rs_exp_list);
1019 CWARN("Stealing %d locks from rs %p x"LPD64".t"LPD64
1021 oldrep->rs_nlocks, oldrep,
1022 oldrep->rs_xid, oldrep->rs_transno, oldrep->rs_opc,
1023 libcfs_nid2str(exp->exp_connection->c_peer.nid));
1025 for (i = 0; i < oldrep->rs_nlocks; i++)
1026 ptlrpc_save_lock(req, &oldrep->rs_locks[i],
1027 oldrep->rs_modes[i], 0);
1028 oldrep->rs_nlocks = 0;
1030 DEBUG_REQ(D_HA, req, "stole locks for");
1031 cfs_spin_lock(&oldrep->rs_lock);
1032 ptlrpc_schedule_difficult_reply (oldrep);
1033 cfs_spin_unlock(&oldrep->rs_lock);
1035 cfs_spin_unlock (&svc->srv_rs_lock);
1038 cfs_spin_unlock(&exp->exp_lock);
1042 * VBR: restore versions
1044 void mdt_vbr_reconstruct(struct ptlrpc_request *req,
1045 struct lsd_client_data *lcd)
1047 __u64 pre_versions[4] = {0};
1048 pre_versions[0] = lcd->lcd_pre_versions[0];
1049 pre_versions[1] = lcd->lcd_pre_versions[1];
1050 pre_versions[2] = lcd->lcd_pre_versions[2];
1051 pre_versions[3] = lcd->lcd_pre_versions[3];
1052 lustre_msg_set_versions(req->rq_repmsg, pre_versions);
1055 void mdt_req_from_lcd(struct ptlrpc_request *req,
1056 struct lsd_client_data *lcd)
1058 DEBUG_REQ(D_HA, req, "restoring transno "LPD64"/status %d",
1059 lcd->lcd_last_transno, lcd->lcd_last_result);
1061 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE ||
1062 lustre_msg_get_opc(req->rq_repmsg) == MDS_DONE_WRITING) {
1063 req->rq_transno = lcd->lcd_last_close_transno;
1064 req->rq_status = lcd->lcd_last_close_result;
1066 req->rq_transno = lcd->lcd_last_transno;
1067 req->rq_status = lcd->lcd_last_result;
1068 mdt_vbr_reconstruct(req, lcd);
1070 if (req->rq_status != 0)
1071 req->rq_transno = 0;
1072 lustre_msg_set_transno(req->rq_repmsg, req->rq_transno);
1073 lustre_msg_set_status(req->rq_repmsg, req->rq_status);
1074 DEBUG_REQ(D_RPCTRACE, req, "restoring transno "LPD64"/status %d",
1075 req->rq_transno, req->rq_status);
1077 mdt_steal_ack_locks(req);
1080 void mdt_reconstruct_generic(struct mdt_thread_info *mti,
1081 struct mdt_lock_handle *lhc)
1083 struct ptlrpc_request *req = mdt_info_req(mti);
1084 struct tg_export_data *ted = &req->rq_export->exp_target_data;
1086 return mdt_req_from_lcd(req, ted->ted_lcd);
1089 static void mdt_reconstruct_create(struct mdt_thread_info *mti,
1090 struct mdt_lock_handle *lhc)
1092 struct ptlrpc_request *req = mdt_info_req(mti);
1093 struct obd_export *exp = req->rq_export;
1094 struct tg_export_data *ted = &exp->exp_target_data;
1095 struct mdt_device *mdt = mti->mti_mdt;
1096 struct mdt_object *child;
1097 struct mdt_body *body;
1100 mdt_req_from_lcd(req, ted->ted_lcd);
1104 /* if no error, so child was created with requested fid */
1105 child = mdt_object_find(mti->mti_env, mdt, mti->mti_rr.rr_fid2);
1106 if (IS_ERR(child)) {
1107 rc = PTR_ERR(child);
1108 LCONSOLE_WARN("Child "DFID" lookup error %d."
1109 " Evicting client %s with export %s.\n",
1110 PFID(mdt_object_fid(child)), rc,
1111 obd_uuid2str(&exp->exp_client_uuid),
1112 obd_export_nid2str(exp));
1113 mdt_export_evict(exp);
1118 body = req_capsule_server_get(mti->mti_pill, &RMF_MDT_BODY);
1119 mti->mti_attr.ma_need = MA_INODE;
1120 mti->mti_attr.ma_valid = 0;
1121 rc = mo_attr_get(mti->mti_env, mdt_object_child(child), &mti->mti_attr);
1122 if (rc == -EREMOTE) {
1123 /* object was created on remote server */
1124 req->rq_status = rc;
1125 body->valid |= OBD_MD_MDS;
1127 mdt_pack_attr2body(mti, body, &mti->mti_attr.ma_attr,
1128 mdt_object_fid(child));
1129 mdt_object_put(mti->mti_env, child);
1132 static void mdt_reconstruct_setattr(struct mdt_thread_info *mti,
1133 struct mdt_lock_handle *lhc)
1135 struct ptlrpc_request *req = mdt_info_req(mti);
1136 struct obd_export *exp = req->rq_export;
1137 struct mdt_export_data *med = &exp->exp_mdt_data;
1138 struct mdt_device *mdt = mti->mti_mdt;
1139 struct mdt_object *obj;
1140 struct mdt_body *body;
1142 mdt_req_from_lcd(req, med->med_ted.ted_lcd);
1146 body = req_capsule_server_get(mti->mti_pill, &RMF_MDT_BODY);
1147 obj = mdt_object_find(mti->mti_env, mdt, mti->mti_rr.rr_fid1);
1149 int rc = PTR_ERR(obj);
1150 LCONSOLE_WARN(""DFID" lookup error %d."
1151 " Evicting client %s with export %s.\n",
1152 PFID(mdt_object_fid(obj)), rc,
1153 obd_uuid2str(&exp->exp_client_uuid),
1154 obd_export_nid2str(exp));
1155 mdt_export_evict(exp);
1159 mti->mti_attr.ma_need = MA_INODE;
1160 mti->mti_attr.ma_valid = 0;
1161 mo_attr_get(mti->mti_env, mdt_object_child(obj), &mti->mti_attr);
1162 mdt_pack_attr2body(mti, body, &mti->mti_attr.ma_attr,
1163 mdt_object_fid(obj));
1164 if (mti->mti_ioepoch && (mti->mti_ioepoch->flags & MF_EPOCH_OPEN)) {
1165 struct mdt_file_data *mfd;
1166 struct mdt_body *repbody;
1168 repbody = req_capsule_server_get(mti->mti_pill, &RMF_MDT_BODY);
1169 repbody->ioepoch = obj->mot_ioepoch;
1170 cfs_spin_lock(&med->med_open_lock);
1171 cfs_list_for_each_entry(mfd, &med->med_open_head, mfd_list) {
1172 if (mfd->mfd_xid == req->rq_xid)
1175 LASSERT(&mfd->mfd_list != &med->med_open_head);
1176 cfs_spin_unlock(&med->med_open_lock);
1177 repbody->handle.cookie = mfd->mfd_handle.h_cookie;
1180 mdt_object_put(mti->mti_env, obj);
1183 typedef void (*mdt_reconstructor)(struct mdt_thread_info *mti,
1184 struct mdt_lock_handle *lhc);
1186 static mdt_reconstructor reconstructors[REINT_MAX] = {
1187 [REINT_SETATTR] = mdt_reconstruct_setattr,
1188 [REINT_CREATE] = mdt_reconstruct_create,
1189 [REINT_LINK] = mdt_reconstruct_generic,
1190 [REINT_UNLINK] = mdt_reconstruct_generic,
1191 [REINT_RENAME] = mdt_reconstruct_generic,
1192 [REINT_OPEN] = mdt_reconstruct_open,
1193 [REINT_SETXATTR] = mdt_reconstruct_generic
1196 void mdt_reconstruct(struct mdt_thread_info *mti,
1197 struct mdt_lock_handle *lhc)
1200 reconstructors[mti->mti_rr.rr_opcode](mti, lhc);