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 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_LOG
44 #include <liblustre.h>
47 #include <obd_class.h>
48 #include <lustre_log.h>
49 #include <libcfs/list.h>
50 #include "llog_internal.h"
52 /* helper functions for calling the llog obd methods */
53 static struct llog_ctxt* llog_new_ctxt(struct obd_device *obd)
55 struct llog_ctxt *ctxt;
57 OBD_ALLOC(ctxt, sizeof(*ctxt));
62 atomic_set(&ctxt->loc_refcount, 1);
67 static void llog_ctxt_destroy(struct llog_ctxt *ctxt)
70 class_export_put(ctxt->loc_exp);
72 class_import_put(ctxt->loc_imp);
75 LASSERT(ctxt->loc_llcd == NULL);
76 OBD_FREE(ctxt, sizeof(*ctxt));
80 int __llog_ctxt_put(struct llog_ctxt *ctxt)
82 struct obd_device *obd;
86 spin_lock(&obd->obd_dev_lock);
87 if (!atomic_dec_and_test(&ctxt->loc_refcount)) {
88 spin_unlock(&obd->obd_dev_lock);
91 obd->obd_llog_ctxt[ctxt->loc_idx] = NULL;
92 spin_unlock(&obd->obd_dev_lock);
94 LASSERTF(obd->obd_starting == 1 ||
95 obd->obd_stopping == 1 || obd->obd_set_up == 0,
96 "wrong obd state: %d/%d/%d\n", !!obd->obd_starting,
97 !!obd->obd_stopping, !!obd->obd_set_up);
99 /* cleanup the llog ctxt here */
100 if (CTXTP(ctxt, cleanup))
101 rc = CTXTP(ctxt, cleanup)(ctxt);
103 llog_ctxt_destroy(ctxt);
104 wake_up(&obd->obd_llog_waitq);
107 EXPORT_SYMBOL(__llog_ctxt_put);
109 int llog_cleanup(struct llog_ctxt *ctxt)
111 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
112 struct obd_device *obd = ctxt->loc_obd;
121 /*banlance the ctxt get when calling llog_cleanup */
124 /* sync with other llog ctxt user thread */
125 spin_lock(&obd->obd_dev_lock);
127 /* obd->obd_starting is needed for the case of cleanup
128 * in error case while obd is starting up. */
129 LASSERTF(obd->obd_starting == 1 ||
130 obd->obd_stopping == 1 || obd->obd_set_up == 0,
131 "wrong obd state: %d/%d/%d\n", !!obd->obd_starting,
132 !!obd->obd_stopping, !!obd->obd_set_up);
134 spin_unlock(&obd->obd_dev_lock);
137 /*try to free the ctxt */
138 rc = __llog_ctxt_put(ctxt);
140 CERROR("Error %d while cleaning up ctxt %p\n",
143 l_wait_event(obd->obd_llog_waitq, llog_ctxt_null(obd, idx), &lwi);
147 EXPORT_SYMBOL(llog_cleanup);
149 int llog_setup(struct obd_device *obd, int index, struct obd_device *disk_obd,
150 int count, struct llog_logid *logid, struct llog_operations *op)
153 struct llog_ctxt *ctxt;
156 if (index < 0 || index >= LLOG_MAX_CTXTS)
159 /* someone can call lov_llog_init with NULL uuid - this can produce
160 * parallel enter to this function */
161 mutex_down(&obd->obd_llog_alloc);
162 ctxt = llog_get_context(obd, index);
164 /* mds_lov_update_mds might call here multiple times. So if the
165 llog is already set up then don't to do it again. */
166 CDEBUG(D_CONFIG, "obd %s ctxt %d already set up\n",
167 obd->obd_name, index);
168 LASSERT(ctxt->loc_obd == obd);
169 LASSERT(ctxt->loc_exp == disk_obd->obd_self_export);
170 LASSERT(ctxt->loc_logops == op);
175 ctxt = llog_new_ctxt(obd);
177 GOTO(out, rc = -ENOMEM);
179 obd->obd_llog_ctxt[index] = ctxt;
180 ctxt->loc_exp = class_export_get(disk_obd->obd_self_export);
181 ctxt->loc_idx = index;
182 ctxt->loc_logops = op;
183 sema_init(&ctxt->loc_sem, 1);
186 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LLOG_SETUP))
189 rc = op->lop_setup(obd, index, disk_obd, count, logid);
193 llog_ctxt_destroy(ctxt);
194 obd->obd_llog_ctxt[index] = NULL;
197 mutex_up(&obd->obd_llog_alloc);
200 EXPORT_SYMBOL(llog_setup);
202 int llog_sync(struct llog_ctxt *ctxt, struct obd_export *exp)
210 if (CTXTP(ctxt, sync))
211 rc = CTXTP(ctxt, sync)(ctxt, exp);
215 EXPORT_SYMBOL(llog_sync);
217 int llog_add(struct llog_ctxt *ctxt, struct llog_rec_hdr *rec,
218 struct lov_stripe_md *lsm, struct llog_cookie *logcookies,
229 CTXT_CHECK_OP(ctxt, add, -EOPNOTSUPP);
230 raised = cfs_cap_raised(CFS_CAP_SYS_RESOURCE);
232 cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
233 rc = CTXTP(ctxt, add)(ctxt, rec, lsm, logcookies, numcookies);
235 cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
238 EXPORT_SYMBOL(llog_add);
240 int llog_cancel(struct llog_ctxt *ctxt, struct lov_stripe_md *lsm,
241 int count, struct llog_cookie *cookies, int flags)
251 CTXT_CHECK_OP(ctxt, cancel, -EOPNOTSUPP);
252 rc = CTXTP(ctxt, cancel)(ctxt, lsm, count, cookies, flags);
255 EXPORT_SYMBOL(llog_cancel);
257 /* callback func for llog_process in llog_obd_origin_setup */
258 static int cat_cancel_cb(struct llog_handle *cathandle,
259 struct llog_rec_hdr *rec, void *data)
261 struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
262 struct llog_handle *loghandle;
263 struct llog_log_hdr *llh;
267 if (rec->lrh_type != LLOG_LOGID_MAGIC) {
268 CERROR("invalid record in catalog\n");
271 CDEBUG(D_HA, "processing log "LPX64":%x at index %u of catalog "
272 LPX64"\n", lir->lid_id.lgl_oid, lir->lid_id.lgl_ogen,
273 rec->lrh_index, cathandle->lgh_id.lgl_oid);
275 rc = llog_cat_id2handle(cathandle, &loghandle, &lir->lid_id);
277 CERROR("Cannot find handle for log "LPX64"\n",
278 lir->lid_id.lgl_oid);
282 llh = loghandle->lgh_hdr;
283 if ((llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
284 (llh->llh_count == 1)) {
285 rc = llog_destroy(loghandle);
287 CERROR("failure destroying log in postsetup: %d\n", rc);
289 index = loghandle->u.phd.phd_cookie.lgc_index;
290 llog_free_handle(loghandle);
293 llog_cat_set_first_idx(cathandle, index);
294 rc = llog_cancel_rec(cathandle, index);
296 CDEBUG(D_HA, "cancel log "LPX64":%x at index %u of "
297 "catalog "LPX64"\n", lir->lid_id.lgl_oid,
298 lir->lid_id.lgl_ogen, rec->lrh_index,
299 cathandle->lgh_id.lgl_oid);
305 /* lop_setup method for filter/osc */
306 // XXX how to set exports
307 int llog_obd_origin_setup(struct obd_device *obd, int index,
308 struct obd_device *disk_obd, int count,
309 struct llog_logid *logid)
311 struct llog_ctxt *ctxt;
312 struct llog_handle *handle;
313 struct lvfs_run_ctxt *saved = NULL;
320 OBD_SLAB_ALLOC_PTR(saved, obd_lvfs_ctxt_cache);
326 ctxt = llog_get_context(obd, index);
331 rc = llog_create(ctxt, &handle, logid, NULL);
333 rc = llog_create(ctxt, &handle, NULL, NULL);
335 *logid = handle->lgh_id;
340 ctxt->loc_handle = handle;
341 push_ctxt(saved, &disk_obd->obd_lvfs_ctxt, NULL);
342 rc = llog_init_handle(handle, LLOG_F_IS_CAT, NULL);
343 pop_ctxt(saved, &disk_obd->obd_lvfs_ctxt, NULL);
347 rc = llog_process(handle, (llog_cb_t)cat_cancel_cb, NULL, NULL);
349 CERROR("llog_process with cat_cancel_cb failed: %d\n", rc);
352 OBD_SLAB_FREE_PTR(saved, obd_lvfs_ctxt_cache);
355 EXPORT_SYMBOL(llog_obd_origin_setup);
357 int llog_obd_origin_cleanup(struct llog_ctxt *ctxt)
359 struct llog_handle *cathandle, *n, *loghandle;
360 struct llog_log_hdr *llh;
367 cathandle = ctxt->loc_handle;
369 list_for_each_entry_safe(loghandle, n,
370 &cathandle->u.chd.chd_head,
372 llh = loghandle->lgh_hdr;
373 if ((llh->llh_flags &
374 LLOG_F_ZAP_WHEN_EMPTY) &&
375 (llh->llh_count == 1)) {
376 rc = llog_destroy(loghandle);
378 CERROR("failure destroying log during "
379 "cleanup: %d\n", rc);
381 index = loghandle->u.phd.phd_cookie.lgc_index;
382 llog_free_handle(loghandle);
385 llog_cat_set_first_idx(cathandle, index);
386 rc = llog_cancel_rec(cathandle, index);
388 CDEBUG(D_RPCTRACE, "cancel plain log at"
389 "index %u of catalog "LPX64"\n",
390 index,cathandle->lgh_id.lgl_oid);
393 llog_cat_put(ctxt->loc_handle);
397 EXPORT_SYMBOL(llog_obd_origin_cleanup);
399 /* add for obdfilter/sz and mds/unlink */
400 int llog_obd_origin_add(struct llog_ctxt *ctxt,
401 struct llog_rec_hdr *rec, struct lov_stripe_md *lsm,
402 struct llog_cookie *logcookies, int numcookies)
404 struct llog_handle *cathandle;
408 cathandle = ctxt->loc_handle;
409 LASSERT(cathandle != NULL);
410 rc = llog_cat_add_rec(cathandle, rec, logcookies, NULL);
412 CERROR("write one catalog record failed: %d\n", rc);
415 EXPORT_SYMBOL(llog_obd_origin_add);
417 int llog_cat_initialize(struct obd_device *obd, int idx,
418 struct obd_uuid *uuid)
420 struct llog_catid idarray;
421 char name[32] = CATLIST;
425 mutex_down(&obd->obd_llog_cat_process);
426 rc = llog_get_cat_list(obd, obd, name, idx, 1, &idarray);
428 CERROR("rc: %d\n", rc);
432 CDEBUG(D_INFO, "%s: Init llog for %s/%d - catid "LPX64"/"LPX64":%x\n",
433 obd->obd_name, uuid->uuid, idx, idarray.lci_logid.lgl_oid,
434 idarray.lci_logid.lgl_ogr, idarray.lci_logid.lgl_ogen);
436 rc = obd_llog_init(obd, obd, 1, &idarray, uuid);
438 CERROR("rc: %d\n", rc);
442 rc = llog_put_cat_list(obd, obd, name, idx, 1, &idarray);
444 CERROR("rc: %d\n", rc);
449 mutex_up(&obd->obd_llog_cat_process);
453 EXPORT_SYMBOL(llog_cat_initialize);
455 int obd_llog_init(struct obd_device *obd, struct obd_device *disk_obd,
456 int count, struct llog_catid *logid, struct obd_uuid *uuid)
460 OBD_CHECK_OP(obd, llog_init, 0);
461 OBD_COUNTER_INCREMENT(obd, llog_init);
463 rc = OBP(obd, llog_init)(obd, disk_obd, count, logid, uuid);
466 EXPORT_SYMBOL(obd_llog_init);
468 int obd_llog_finish(struct obd_device *obd, int count)
472 OBD_CHECK_OP(obd, llog_finish, 0);
473 OBD_COUNTER_INCREMENT(obd, llog_finish);
475 rc = OBP(obd, llog_finish)(obd, count);
478 EXPORT_SYMBOL(obd_llog_finish);