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).
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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) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Whamcloud, Inc.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * Lustre Common Target
37 * These are common function for MDT and OST recovery-related functionality
39 * Author: Mikhail Pershin <tappro@sun.com>
43 #include <lustre_fsfilt.h>
44 #include <obd_class.h>
47 * Update client data in last_rcvd file. An obd API
49 static int obt_client_data_update(struct obd_export *exp)
51 struct tg_export_data *ted = &exp->exp_target_data;
52 struct obd_device_target *obt = &exp->exp_obd->u.obt;
53 struct lu_target *lut = class_exp2tgt(exp);
54 loff_t off = ted->ted_lr_off;
57 rc = fsfilt_write_record(exp->exp_obd, obt->obt_rcvd_filp,
58 ted->ted_lcd, sizeof(*ted->ted_lcd), &off, 0);
60 CDEBUG(D_INFO, "update client idx %u last_epoch %#x (%#x)\n",
61 ted->ted_lr_idx, le32_to_cpu(ted->ted_lcd->lcd_last_epoch),
62 le32_to_cpu(lut->lut_lsd.lsd_start_epoch));
68 * Update server data in last_rcvd file. An obd API
70 int obt_server_data_update(struct lu_target *lut, int force_sync)
72 struct obd_device_target *obt = &lut->lut_obd->u.obt;
78 "%s: mount_count is "LPU64", last_transno is "LPU64"\n",
79 lut->lut_lsd.lsd_uuid,
80 le64_to_cpu(lut->lut_lsd.lsd_mount_count),
81 le64_to_cpu(lut->lut_lsd.lsd_last_transno));
83 rc = fsfilt_write_record(lut->lut_obd, obt->obt_rcvd_filp,
84 &lut->lut_lsd, sizeof(lut->lut_lsd),
87 CERROR("error writing lr_server_data: rc = %d\n", rc);
93 * Update client epoch with server's one
95 void obt_client_epoch_update(struct obd_export *exp)
97 struct lsd_client_data *lcd = exp->exp_target_data.ted_lcd;
98 struct lu_target *lut = class_exp2tgt(exp);
100 /** VBR: set client last_epoch to current epoch */
101 if (le32_to_cpu(lcd->lcd_last_epoch) >=
102 le32_to_cpu(lut->lut_lsd.lsd_start_epoch))
104 lcd->lcd_last_epoch = lut->lut_lsd.lsd_start_epoch;
105 obt_client_data_update(exp);
109 * Increment server epoch. An obd API
111 static void obt_boot_epoch_update(struct lu_target *lut)
113 struct obd_device *obd = lut->lut_obd;
115 struct ptlrpc_request *req;
116 cfs_list_t client_list;
118 cfs_spin_lock(&lut->lut_translock);
119 start_epoch = lr_epoch(le64_to_cpu(lut->lut_last_transno)) + 1;
120 lut->lut_last_transno = cpu_to_le64((__u64)start_epoch <<
122 lut->lut_lsd.lsd_start_epoch = cpu_to_le32(start_epoch);
123 cfs_spin_unlock(&lut->lut_translock);
125 CFS_INIT_LIST_HEAD(&client_list);
126 cfs_spin_lock(&obd->obd_recovery_task_lock);
127 cfs_list_splice_init(&obd->obd_final_req_queue, &client_list);
128 cfs_spin_unlock(&obd->obd_recovery_task_lock);
131 * go through list of exports participated in recovery and
132 * set new epoch for them
134 cfs_list_for_each_entry(req, &client_list, rq_list) {
135 LASSERT(!req->rq_export->exp_delayed);
136 obt_client_epoch_update(req->rq_export);
138 /** return list back at once */
139 cfs_spin_lock(&obd->obd_recovery_task_lock);
140 cfs_list_splice_init(&client_list, &obd->obd_final_req_queue);
141 cfs_spin_unlock(&obd->obd_recovery_task_lock);
142 obt_server_data_update(lut, 1);
146 * write data in last_rcvd file.
148 static int lut_last_rcvd_write(const struct lu_env *env, struct lu_target *lut,
149 const struct lu_buf *buf, loff_t *off, int sync)
155 th = dt_trans_create(env, lut->lut_bottom);
159 rc = dt_declare_record_write(env, lut->lut_last_rcvd,
160 buf->lb_len, *off, th);
164 rc = dt_trans_start_local(env, lut->lut_bottom, th);
168 rc = dt_record_write(env, lut->lut_last_rcvd, buf, off, th);
171 dt_trans_stop(env, lut->lut_bottom, th);
173 CDEBUG(D_INFO, "write last_rcvd header rc = %d:\n"
174 "uuid = %s\nlast_transno = "LPU64"\n",
175 rc, lut->lut_lsd.lsd_uuid, lut->lut_lsd.lsd_last_transno);
181 * Allocate in-memory data for client slot related to export.
183 int lut_client_alloc(struct obd_export *exp)
185 LASSERT(exp != exp->exp_obd->obd_self_export);
187 OBD_ALLOC_PTR(exp->exp_target_data.ted_lcd);
188 if (exp->exp_target_data.ted_lcd == NULL)
190 /* Mark that slot is not yet valid, 0 doesn't work here */
191 exp->exp_target_data.ted_lr_idx = -1;
194 EXPORT_SYMBOL(lut_client_alloc);
197 * Free in-memory data for client slot related to export.
199 void lut_client_free(struct obd_export *exp)
201 struct tg_export_data *ted = &exp->exp_target_data;
202 struct lu_target *lut = class_exp2tgt(exp);
204 LASSERT(exp != exp->exp_obd->obd_self_export);
206 OBD_FREE_PTR(ted->ted_lcd);
209 /* Slot may be not yet assigned */
210 if (ted->ted_lr_idx < 0)
212 /* Clear bit when lcd is freed */
213 cfs_spin_lock(&lut->lut_client_bitmap_lock);
214 if (!cfs_test_and_clear_bit(ted->ted_lr_idx, lut->lut_client_bitmap)) {
215 CERROR("%s: client %u bit already clear in bitmap\n",
216 exp->exp_obd->obd_name, ted->ted_lr_idx);
219 cfs_spin_unlock(&lut->lut_client_bitmap_lock);
221 EXPORT_SYMBOL(lut_client_free);
224 * Update client data in last_rcvd
226 int lut_client_data_update(const struct lu_env *env, struct obd_export *exp)
228 struct tg_export_data *ted = &exp->exp_target_data;
229 struct lu_target *lut = class_exp2tgt(exp);
230 struct lsd_client_data tmp_lcd;
231 loff_t tmp_off = ted->ted_lr_off;
232 struct lu_buf tmp_buf = {
234 .lb_len = sizeof(tmp_lcd)
238 lcd_cpu_to_le(ted->ted_lcd, &tmp_lcd);
239 LASSERT(lut->lut_last_rcvd);
240 rc = lut_last_rcvd_write(env, lut, &tmp_buf, &tmp_off, 0);
246 * Update server data in last_rcvd
248 int lut_server_data_update(const struct lu_env *env,
249 struct lu_target *lut, int sync)
251 struct lr_server_data tmp_lsd;
253 struct lu_buf tmp_buf = {
255 .lb_len = sizeof(tmp_lsd)
261 "%s: mount_count is "LPU64", last_transno is "LPU64"\n",
262 lut->lut_lsd.lsd_uuid, lut->lut_obd->u.obt.obt_mount_count,
263 lut->lut_last_transno);
265 cfs_spin_lock(&lut->lut_translock);
266 lut->lut_lsd.lsd_last_transno = lut->lut_last_transno;
267 cfs_spin_unlock(&lut->lut_translock);
269 lsd_cpu_to_le(&lut->lut_lsd, &tmp_lsd);
270 if (lut->lut_last_rcvd != NULL)
271 rc = lut_last_rcvd_write(env, lut, &tmp_buf, &tmp_off, sync);
275 void lut_client_epoch_update(const struct lu_env *env, struct obd_export *exp)
277 struct lsd_client_data *lcd = exp->exp_target_data.ted_lcd;
278 struct lu_target *lut = class_exp2tgt(exp);
280 LASSERT(lut->lut_bottom);
281 /** VBR: set client last_epoch to current epoch */
282 if (lcd->lcd_last_epoch >= lut->lut_lsd.lsd_start_epoch)
284 lcd->lcd_last_epoch = lut->lut_lsd.lsd_start_epoch;
285 lut_client_data_update(env, exp);
289 * Update boot epoch when recovery ends
291 void lut_boot_epoch_update(struct lu_target *lut)
294 struct ptlrpc_request *req;
296 cfs_list_t client_list;
299 if (lut->lut_obd->obd_stopping)
301 /** Increase server epoch after recovery */
302 if (lut->lut_bottom == NULL)
303 return obt_boot_epoch_update(lut);
305 rc = lu_env_init(&env, LCT_LOCAL);
307 CERROR("Can't initialize environment rc=%d\n", rc);
311 cfs_spin_lock(&lut->lut_translock);
312 start_epoch = lr_epoch(lut->lut_last_transno) + 1;
313 lut->lut_last_transno = (__u64)start_epoch << LR_EPOCH_BITS;
314 lut->lut_lsd.lsd_start_epoch = start_epoch;
315 cfs_spin_unlock(&lut->lut_translock);
317 CFS_INIT_LIST_HEAD(&client_list);
319 * The recovery is not yet finished and final queue can still be updated
320 * with resend requests. Move final list to separate one for processing
322 cfs_spin_lock(&lut->lut_obd->obd_recovery_task_lock);
323 cfs_list_splice_init(&lut->lut_obd->obd_final_req_queue, &client_list);
324 cfs_spin_unlock(&lut->lut_obd->obd_recovery_task_lock);
327 * go through list of exports participated in recovery and
328 * set new epoch for them
330 cfs_list_for_each_entry(req, &client_list, rq_list) {
331 LASSERT(!req->rq_export->exp_delayed);
332 if (!req->rq_export->exp_vbr_failed)
333 lut_client_epoch_update(&env, req->rq_export);
335 /** return list back at once */
336 cfs_spin_lock(&lut->lut_obd->obd_recovery_task_lock);
337 cfs_list_splice_init(&client_list, &lut->lut_obd->obd_final_req_queue);
338 cfs_spin_unlock(&lut->lut_obd->obd_recovery_task_lock);
339 /** update server epoch */
340 lut_server_data_update(&env, lut, 1);
343 EXPORT_SYMBOL(lut_boot_epoch_update);
346 * commit callback, need to update last_commited value
348 struct lut_last_committed_callback {
349 struct dt_txn_commit_cb llcc_cb;
350 struct lu_target *llcc_lut;
351 struct obd_export *llcc_exp;
355 void lut_cb_last_committed(struct lu_env *env, struct thandle *th,
356 struct dt_txn_commit_cb *cb, int err)
358 struct lut_last_committed_callback *ccb;
360 ccb = container_of0(cb, struct lut_last_committed_callback, llcc_cb);
362 LASSERT(ccb->llcc_exp->exp_obd == ccb->llcc_lut->lut_obd);
364 cfs_spin_lock(&ccb->llcc_lut->lut_translock);
365 if (ccb->llcc_transno > ccb->llcc_lut->lut_obd->obd_last_committed)
366 ccb->llcc_lut->lut_obd->obd_last_committed = ccb->llcc_transno;
368 LASSERT(ccb->llcc_exp);
369 if (ccb->llcc_transno > ccb->llcc_exp->exp_last_committed) {
370 ccb->llcc_exp->exp_last_committed = ccb->llcc_transno;
371 cfs_spin_unlock(&ccb->llcc_lut->lut_translock);
372 ptlrpc_commit_replies(ccb->llcc_exp);
374 cfs_spin_unlock(&ccb->llcc_lut->lut_translock);
376 class_export_cb_put(ccb->llcc_exp);
377 if (ccb->llcc_transno)
378 CDEBUG(D_HA, "%s: transno "LPD64" is committed\n",
379 ccb->llcc_lut->lut_obd->obd_name, ccb->llcc_transno);
380 cfs_list_del(&ccb->llcc_cb.dcb_linkage);
384 int lut_last_commit_cb_add(struct thandle *th, struct lu_target *lut,
385 struct obd_export *exp, __u64 transno)
387 struct lut_last_committed_callback *ccb;
394 ccb->llcc_cb.dcb_func = lut_cb_last_committed;
395 CFS_INIT_LIST_HEAD(&ccb->llcc_cb.dcb_linkage);
397 ccb->llcc_exp = class_export_cb_get(exp);
398 ccb->llcc_transno = transno;
400 rc = dt_trans_cb_add(th, &ccb->llcc_cb);
402 class_export_cb_put(exp);
407 EXPORT_SYMBOL(lut_last_commit_cb_add);
409 struct lut_new_client_callback {
410 struct dt_txn_commit_cb lncc_cb;
411 struct obd_export *lncc_exp;
414 void lut_cb_new_client(struct lu_env *env, struct thandle *th,
415 struct dt_txn_commit_cb *cb, int err)
417 struct lut_new_client_callback *ccb;
419 ccb = container_of0(cb, struct lut_new_client_callback, lncc_cb);
421 LASSERT(ccb->lncc_exp->exp_obd);
423 CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n",
424 ccb->lncc_exp->exp_obd->obd_name,
425 ccb->lncc_exp->exp_client_uuid.uuid);
427 cfs_spin_lock(&ccb->lncc_exp->exp_lock);
428 ccb->lncc_exp->exp_need_sync = 0;
429 cfs_spin_unlock(&ccb->lncc_exp->exp_lock);
430 class_export_cb_put(ccb->lncc_exp);
432 cfs_list_del(&ccb->lncc_cb.dcb_linkage);
436 int lut_new_client_cb_add(struct thandle *th, struct obd_export *exp)
438 struct lut_new_client_callback *ccb;
445 ccb->lncc_cb.dcb_func = lut_cb_new_client;
446 CFS_INIT_LIST_HEAD(&ccb->lncc_cb.dcb_linkage);
447 ccb->lncc_exp = class_export_cb_get(exp);
449 rc = dt_trans_cb_add(th, &ccb->lncc_cb);
451 class_export_cb_put(exp);
456 EXPORT_SYMBOL(lut_new_client_cb_add);
458 int lut_init(const struct lu_env *env, struct lu_target *lut,
459 struct obd_device *obd, struct dt_device *dt)
469 lut->lut_bottom = dt;
470 lut->lut_last_rcvd = NULL;
471 obd->u.obt.obt_lut = lut;
473 cfs_spin_lock_init(&lut->lut_translock);
474 cfs_spin_lock_init(&lut->lut_client_bitmap_lock);
476 OBD_ALLOC(lut->lut_client_bitmap, LR_MAX_CLIENTS >> 3);
477 if (lut->lut_client_bitmap == NULL)
480 /** obdfilter has no lu_device stack yet */
483 o = dt_store_open(env, lut->lut_bottom, "", LAST_RCVD, &fid);
485 lut->lut_last_rcvd = o;
487 OBD_FREE(lut->lut_client_bitmap, LR_MAX_CLIENTS >> 3);
488 lut->lut_client_bitmap = NULL;
490 CERROR("cannot open %s: rc = %d\n", LAST_RCVD, rc);
495 EXPORT_SYMBOL(lut_init);
497 void lut_fini(const struct lu_env *env, struct lu_target *lut)
501 if (lut->lut_client_bitmap) {
502 OBD_FREE(lut->lut_client_bitmap, LR_MAX_CLIENTS >> 3);
503 lut->lut_client_bitmap = NULL;
505 if (lut->lut_last_rcvd) {
506 lu_object_put(env, &lut->lut_last_rcvd->do_lu);
507 lut->lut_last_rcvd = NULL;
511 EXPORT_SYMBOL(lut_fini);