1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2005 Cluster File Systems, Inc.
6 * This file is part of the Lustre file system, http://www.lustre.org
7 * Lustre is a trademark of Cluster File Systems, Inc.
9 * You may have signed or agreed to another license before downloading
10 * this software. If so, you are bound by the terms and conditions
11 * of that agreement, and the following does not apply to you. See the
12 * LICENSE file included with this distribution for more information.
14 * If you did not agree to a different license, then this copy of Lustre
15 * is open source software; you can redistribute it and/or modify it
16 * under the terms of version 2 of the GNU General Public License as
17 * published by the Free Software Foundation.
19 * In either case, Lustre is distributed in the hope that it will be
20 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
21 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * license text for more details.
25 #define DEBUG_SUBSYSTEM S_LOG
32 #include <liblustre.h>
35 #include <obd_class.h>
36 #include <lustre_log.h>
37 #include <libcfs/list.h>
38 #include "llog_internal.h"
40 /* helper functions for calling the llog obd methods */
41 static struct llog_ctxt* llog_new_ctxt(struct obd_device *obd)
43 struct llog_ctxt *ctxt;
50 atomic_set(&ctxt->loc_refcount, 1);
55 static void llog_ctxt_destroy(struct llog_ctxt *ctxt)
58 class_export_put(ctxt->loc_exp);
60 class_import_put(ctxt->loc_imp);
68 int __llog_ctxt_put(struct llog_ctxt *ctxt)
70 struct obd_llog_group *olg = ctxt->loc_olg;
71 struct obd_device *obd;
74 spin_lock(&olg->olg_lock);
75 if (!atomic_dec_and_test(&ctxt->loc_refcount)) {
76 spin_unlock(&olg->olg_lock);
79 olg->olg_ctxts[ctxt->loc_idx] = NULL;
80 spin_unlock(&olg->olg_lock);
83 spin_lock(&obd->obd_dev_lock);
84 spin_unlock(&obd->obd_dev_lock); /* sync with llog ctxt user thread */
85 LASSERT(obd->obd_stopping == 1 || obd->obd_set_up == 0);
86 /* cleanup the llog ctxt here */
87 if (CTXTP(ctxt, cleanup))
88 rc = CTXTP(ctxt, cleanup)(ctxt);
90 llog_ctxt_destroy(ctxt);
91 wake_up(&olg->olg_waitq);
94 EXPORT_SYMBOL(__llog_ctxt_put);
96 int llog_cleanup(struct llog_ctxt *ctxt)
98 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
99 struct obd_llog_group *olg;
111 /* banlance the ctxt get when calling llog_cleanup */
112 LASSERT(atomic_read(&ctxt->loc_refcount) > 1);
115 /* try to free the ctxt */
116 rc = __llog_ctxt_put(ctxt);
118 l_wait_event(olg->olg_waitq,
119 llog_group_ctxt_null(olg, idx), &lwi);
123 EXPORT_SYMBOL(llog_cleanup);
125 int llog_setup(struct obd_device *obd, struct obd_llog_group *olg, int index,
126 struct obd_device *disk_obd, int count, struct llog_logid *logid,
127 struct llog_operations *op)
130 struct llog_ctxt *ctxt;
133 if (index < 0 || index >= LLOG_MAX_CTXTS)
136 LASSERT(olg != NULL);
137 ctxt = llog_group_get_ctxt(olg, index);
139 /* in some recovery cases, obd_llog_ctxt might already be set,
140 * but llogs might still be zero, for example in obd_filter recovery */
142 /* mds_lov_update_mds might call here multiple times. So if the
143 llog is already set up then don't to do it again. */
144 CDEBUG(D_CONFIG, "obd %s ctxt %d already set up\n",
145 obd->obd_name, index);
146 LASSERT(ctxt->loc_olg == olg);
147 LASSERT(ctxt->loc_obd == obd);
148 LASSERT(ctxt->loc_exp == disk_obd->obd_self_export);
149 LASSERT(ctxt->loc_logops == op);
153 ctxt = llog_new_ctxt(obd);
155 GOTO(out, rc = -ENOMEM);
157 rc = llog_group_set_ctxt(olg, ctxt, index);
159 llog_ctxt_destroy(ctxt);
165 ctxt->loc_exp = class_export_get(disk_obd->obd_self_export);
167 ctxt->loc_idx = index;
168 ctxt->loc_logops = op;
169 sema_init(&ctxt->loc_sem, 1);
172 rc = op->lop_setup(obd, olg, index, disk_obd, count, logid);
175 llog_ctxt_destroy(ctxt);
180 EXPORT_SYMBOL(llog_setup);
182 int llog_sync(struct llog_ctxt *ctxt, struct obd_export *exp)
190 if (CTXTP(ctxt, sync))
191 rc = CTXTP(ctxt, sync)(ctxt, exp);
195 EXPORT_SYMBOL(llog_sync);
197 int llog_add(struct llog_ctxt *ctxt, struct llog_rec_hdr *rec,
198 struct lov_stripe_md *lsm, struct llog_cookie *logcookies,
210 CTXT_CHECK_OP(ctxt, add, -EOPNOTSUPP);
211 cap = current->cap_effective;
212 cap_raise(current->cap_effective, CAP_SYS_RESOURCE);
213 rc = CTXTP(ctxt, add)(ctxt, rec, lsm, logcookies, numcookies);
214 current->cap_effective = cap;
217 EXPORT_SYMBOL(llog_add);
219 int llog_cancel(struct llog_ctxt *ctxt, struct lov_stripe_md *lsm,
220 int count, struct llog_cookie *cookies, int flags)
230 CTXT_CHECK_OP(ctxt, cancel, -EOPNOTSUPP);
231 rc = CTXTP(ctxt, cancel)(ctxt, lsm, count, cookies, flags);
234 EXPORT_SYMBOL(llog_cancel);
236 /* callback func for llog_process in llog_obd_origin_setup */
237 static int cat_cancel_cb(struct llog_handle *cathandle,
238 struct llog_rec_hdr *rec, void *data)
240 struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
241 struct llog_handle *loghandle;
242 struct llog_log_hdr *llh;
246 if (rec->lrh_type != LLOG_LOGID_MAGIC) {
247 CERROR("invalid record in catalog\n");
250 CDEBUG(D_HA, "processing log "LPX64":%x at index %u of catalog "
251 LPX64"\n", lir->lid_id.lgl_oid, lir->lid_id.lgl_ogen,
252 rec->lrh_index, cathandle->lgh_id.lgl_oid);
254 rc = llog_cat_id2handle(cathandle, &loghandle, &lir->lid_id);
256 CERROR("Cannot find handle for log "LPX64"\n",
257 lir->lid_id.lgl_oid);
261 llh = loghandle->lgh_hdr;
262 if ((llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
263 (llh->llh_count == 1)) {
264 rc = llog_destroy(loghandle);
266 CERROR("failure destroying log in postsetup: %d\n", rc);
268 index = loghandle->u.phd.phd_cookie.lgc_index;
269 llog_free_handle(loghandle);
272 llog_cat_set_first_idx(cathandle, index);
273 rc = llog_cancel_rec(cathandle, index);
275 CDEBUG(D_HA, "cancel log "LPX64":%x at index %u of catalog "
276 LPX64"\n", lir->lid_id.lgl_oid,
277 lir->lid_id.lgl_ogen, rec->lrh_index,
278 cathandle->lgh_id.lgl_oid);
284 /* lop_setup method for filter/osc */
285 // XXX how to set exports
286 int llog_obd_origin_setup(struct obd_device *obd, struct obd_llog_group *olg,
287 int index, struct obd_device *disk_obd, int count,
288 struct llog_logid *logid)
290 struct llog_ctxt *ctxt;
291 struct llog_handle *handle;
292 struct lvfs_run_ctxt saved;
301 LASSERT(olg != NULL);
302 ctxt = llog_group_get_ctxt(olg, index);
308 rc = llog_create(ctxt, &handle, logid, NULL);
310 rc = llog_create(ctxt, &handle, NULL, NULL);
312 *logid = handle->lgh_id;
317 ctxt->loc_handle = handle;
318 push_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
319 rc = llog_init_handle(handle, LLOG_F_IS_CAT, NULL);
320 pop_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
324 rc = llog_process(handle, (llog_cb_t)cat_cancel_cb, NULL, NULL);
326 CERROR("llog_process with cat_cancel_cb failed: %d\n", rc);
331 EXPORT_SYMBOL(llog_obd_origin_setup);
333 int llog_obd_origin_cleanup(struct llog_ctxt *ctxt)
335 struct llog_handle *cathandle, *n, *loghandle;
336 struct llog_log_hdr *llh;
343 cathandle = ctxt->loc_handle;
345 list_for_each_entry_safe(loghandle, n,
346 &cathandle->u.chd.chd_head,
348 llh = loghandle->lgh_hdr;
349 if ((llh->llh_flags &
350 LLOG_F_ZAP_WHEN_EMPTY) &&
351 (llh->llh_count == 1)) {
352 rc = llog_destroy(loghandle);
354 CERROR("failure destroying log during "
355 "cleanup: %d\n", rc);
357 index = loghandle->u.phd.phd_cookie.lgc_index;
358 llog_free_handle(loghandle);
361 llog_cat_set_first_idx(cathandle, index);
362 rc = llog_cancel_rec(cathandle, index);
364 CDEBUG(D_RPCTRACE, "cancel plain log at"
365 "index %u of catalog "LPX64"\n",
366 index,cathandle->lgh_id.lgl_oid);
369 llog_cat_put(ctxt->loc_handle);
373 EXPORT_SYMBOL(llog_obd_origin_cleanup);
375 /* add for obdfilter/sz and mds/unlink */
376 int llog_obd_origin_add(struct llog_ctxt *ctxt,
377 struct llog_rec_hdr *rec, struct lov_stripe_md *lsm,
378 struct llog_cookie *logcookies, int numcookies)
380 struct llog_handle *cathandle;
384 cathandle = ctxt->loc_handle;
385 LASSERT(cathandle != NULL);
386 rc = llog_cat_add_rec(cathandle, rec, logcookies, NULL);
388 CERROR("write one catalog record failed: %d\n", rc);
391 EXPORT_SYMBOL(llog_obd_origin_add);
393 int llog_cat_initialize(struct obd_device *obd, struct obd_llog_group *olg,
394 int count, struct obd_uuid *uuid)
396 char name[32] = CATLIST;
397 struct llog_catid *idarray = NULL;
398 int size = sizeof(*idarray) * count;
403 OBD_VMALLOC(idarray, size);
408 rc = llog_get_cat_list(obd, obd, name, count, idarray);
410 CERROR("rc: %d\n", rc);
414 rc = obd_llog_init(obd, olg, obd, count, idarray, uuid);
416 CERROR("rc: %d\n", rc);
420 rc = llog_put_cat_list(obd, obd, name, count, idarray);
422 CERROR("rc: %d\n", rc);
428 OBD_VFREE(idarray, size);
431 EXPORT_SYMBOL(llog_cat_initialize);
433 int obd_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
434 struct obd_device *disk_obd, int count,
435 struct llog_catid *logid, struct obd_uuid *uuid)
439 OBD_CHECK_DT_OP(obd, llog_init, 0);
440 OBD_COUNTER_INCREMENT(obd, llog_init);
442 rc = OBP(obd, llog_init)(obd, olg, disk_obd, count, logid, uuid);
445 EXPORT_SYMBOL(obd_llog_init);
447 int obd_llog_finish(struct obd_device *obd, int count)
451 OBD_CHECK_DT_OP(obd, llog_finish, 0);
452 OBD_COUNTER_INCREMENT(obd, llog_finish);
454 rc = OBP(obd, llog_finish)(obd, count);
457 EXPORT_SYMBOL(obd_llog_finish);