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);
63 int __llog_ctxt_put(struct llog_ctxt *ctxt)
65 struct obd_llog_group *olg = ctxt->loc_olg;
66 struct obd_device *obd;
69 spin_lock(&olg->olg_lock);
70 if (!atomic_dec_and_test(&ctxt->loc_refcount)) {
71 spin_unlock(&olg->olg_lock);
74 olg->olg_ctxts[ctxt->loc_idx] = NULL;
75 spin_unlock(&olg->olg_lock);
78 spin_lock(&obd->obd_dev_lock);
79 spin_unlock(&obd->obd_dev_lock); /* sync with llog ctxt user thread */
80 LASSERT(obd->obd_stopping == 1 || obd->obd_set_up == 0);
81 /* cleanup the llog ctxt here */
82 if (CTXTP(ctxt, cleanup))
83 rc = CTXTP(ctxt, cleanup)(ctxt);
85 llog_ctxt_destroy(ctxt);
86 wake_up(&olg->olg_waitq);
89 EXPORT_SYMBOL(__llog_ctxt_put);
91 int llog_cleanup(struct llog_ctxt *ctxt)
93 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
94 struct obd_llog_group *olg;
106 /* banlance the ctxt get when calling llog_cleanup */
107 LASSERT(atomic_read(&ctxt->loc_refcount) > 1);
110 /* try to free the ctxt */
111 rc = __llog_ctxt_put(ctxt);
113 l_wait_event(olg->olg_waitq,
114 llog_group_ctxt_null(olg, idx), &lwi);
118 EXPORT_SYMBOL(llog_cleanup);
120 int llog_setup(struct obd_device *obd, struct obd_llog_group *olg, int index,
121 struct obd_device *disk_obd, int count, struct llog_logid *logid,
122 struct llog_operations *op)
125 struct llog_ctxt *ctxt;
128 if (index < 0 || index >= LLOG_MAX_CTXTS)
131 LASSERT(olg != NULL);
132 ctxt = llog_group_get_ctxt(olg, index);
134 /* in some recovery cases, obd_llog_ctxt might already be set,
135 * but llogs might still be zero, for example in obd_filter recovery */
137 /* mds_lov_update_mds might call here multiple times. So if the
138 llog is already set up then don't to do it again. */
139 CDEBUG(D_CONFIG, "obd %s ctxt %d already set up\n",
140 obd->obd_name, index);
141 LASSERT(ctxt->loc_olg == olg);
142 LASSERT(ctxt->loc_obd == obd);
143 LASSERT(ctxt->loc_exp == disk_obd->obd_self_export);
144 LASSERT(ctxt->loc_logops == op);
148 ctxt = llog_new_ctxt(obd);
150 GOTO(out, rc = -ENOMEM);
152 rc = llog_group_set_ctxt(olg, ctxt, index);
154 llog_ctxt_destroy(ctxt);
160 ctxt->loc_exp = class_export_get(disk_obd->obd_self_export);
162 ctxt->loc_idx = index;
163 ctxt->loc_logops = op;
164 sema_init(&ctxt->loc_sem, 1);
167 rc = op->lop_setup(obd, olg, index, disk_obd, count, logid);
170 llog_ctxt_destroy(ctxt);
175 EXPORT_SYMBOL(llog_setup);
177 int llog_sync(struct llog_ctxt *ctxt, struct obd_export *exp)
185 if (CTXTP(ctxt, sync))
186 rc = CTXTP(ctxt, sync)(ctxt, exp);
190 EXPORT_SYMBOL(llog_sync);
192 int llog_add(struct llog_ctxt *ctxt, struct llog_rec_hdr *rec,
193 struct lov_stripe_md *lsm, struct llog_cookie *logcookies,
205 CTXT_CHECK_OP(ctxt, add, -EOPNOTSUPP);
206 cap = current->cap_effective;
207 cap_raise(current->cap_effective, CAP_SYS_RESOURCE);
208 rc = CTXTP(ctxt, add)(ctxt, rec, lsm, logcookies, numcookies);
209 current->cap_effective = cap;
212 EXPORT_SYMBOL(llog_add);
214 int llog_cancel(struct llog_ctxt *ctxt, struct lov_stripe_md *lsm,
215 int count, struct llog_cookie *cookies, int flags)
225 CTXT_CHECK_OP(ctxt, cancel, -EOPNOTSUPP);
226 rc = CTXTP(ctxt, cancel)(ctxt, lsm, count, cookies, flags);
229 EXPORT_SYMBOL(llog_cancel);
231 /* callback func for llog_process in llog_obd_origin_setup */
232 static int cat_cancel_cb(struct llog_handle *cathandle,
233 struct llog_rec_hdr *rec, void *data)
235 struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
236 struct llog_handle *loghandle;
237 struct llog_log_hdr *llh;
241 if (rec->lrh_type != LLOG_LOGID_MAGIC) {
242 CERROR("invalid record in catalog\n");
245 CDEBUG(D_HA, "processing log "LPX64":%x at index %u of catalog "
246 LPX64"\n", lir->lid_id.lgl_oid, lir->lid_id.lgl_ogen,
247 rec->lrh_index, cathandle->lgh_id.lgl_oid);
249 rc = llog_cat_id2handle(cathandle, &loghandle, &lir->lid_id);
251 CERROR("Cannot find handle for log "LPX64"\n",
252 lir->lid_id.lgl_oid);
256 llh = loghandle->lgh_hdr;
257 if ((llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
258 (llh->llh_count == 1)) {
259 rc = llog_destroy(loghandle);
261 CERROR("failure destroying log in postsetup: %d\n", rc);
263 index = loghandle->u.phd.phd_cookie.lgc_index;
264 llog_free_handle(loghandle);
267 llog_cat_set_first_idx(cathandle, index);
268 rc = llog_cancel_rec(cathandle, index);
270 CDEBUG(D_HA, "cancel log "LPX64":%x at index %u of catalog "
271 LPX64"\n", lir->lid_id.lgl_oid,
272 lir->lid_id.lgl_ogen, rec->lrh_index,
273 cathandle->lgh_id.lgl_oid);
279 /* lop_setup method for filter/osc */
280 // XXX how to set exports
281 int llog_obd_origin_setup(struct obd_device *obd, struct obd_llog_group *olg,
282 int index, struct obd_device *disk_obd, int count,
283 struct llog_logid *logid)
285 struct llog_ctxt *ctxt;
286 struct llog_handle *handle;
287 struct lvfs_run_ctxt saved;
296 LASSERT(olg != NULL);
297 ctxt = llog_group_get_ctxt(olg, index);
303 rc = llog_create(ctxt, &handle, logid, NULL);
305 rc = llog_create(ctxt, &handle, NULL, NULL);
307 *logid = handle->lgh_id;
312 ctxt->loc_handle = handle;
313 push_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
314 rc = llog_init_handle(handle, LLOG_F_IS_CAT, NULL);
315 pop_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
319 rc = llog_process(handle, (llog_cb_t)cat_cancel_cb, NULL, NULL);
321 CERROR("llog_process with cat_cancel_cb failed: %d\n", rc);
326 EXPORT_SYMBOL(llog_obd_origin_setup);
328 int llog_obd_origin_cleanup(struct llog_ctxt *ctxt)
330 struct llog_handle *cathandle, *n, *loghandle;
331 struct llog_log_hdr *llh;
338 cathandle = ctxt->loc_handle;
340 list_for_each_entry_safe(loghandle, n,
341 &cathandle->u.chd.chd_head,
343 llh = loghandle->lgh_hdr;
344 if ((llh->llh_flags &
345 LLOG_F_ZAP_WHEN_EMPTY) &&
346 (llh->llh_count == 1)) {
347 rc = llog_destroy(loghandle);
349 CERROR("failure destroying log during "
350 "cleanup: %d\n", rc);
352 index = loghandle->u.phd.phd_cookie.lgc_index;
353 llog_free_handle(loghandle);
356 llog_cat_set_first_idx(cathandle, index);
357 rc = llog_cancel_rec(cathandle, index);
359 CDEBUG(D_RPCTRACE, "cancel plain log at"
360 "index %u of catalog "LPX64"\n",
361 index,cathandle->lgh_id.lgl_oid);
364 llog_cat_put(ctxt->loc_handle);
368 EXPORT_SYMBOL(llog_obd_origin_cleanup);
370 /* add for obdfilter/sz and mds/unlink */
371 int llog_obd_origin_add(struct llog_ctxt *ctxt,
372 struct llog_rec_hdr *rec, struct lov_stripe_md *lsm,
373 struct llog_cookie *logcookies, int numcookies)
375 struct llog_handle *cathandle;
379 cathandle = ctxt->loc_handle;
380 LASSERT(cathandle != NULL);
381 rc = llog_cat_add_rec(cathandle, rec, logcookies, NULL);
383 CERROR("write one catalog record failed: %d\n", rc);
386 EXPORT_SYMBOL(llog_obd_origin_add);
388 int llog_cat_initialize(struct obd_device *obd, struct obd_llog_group *olg,
389 int count, struct obd_uuid *uuid)
391 char name[32] = CATLIST;
392 struct llog_catid *idarray = NULL;
393 int size = sizeof(*idarray) * count;
398 OBD_VMALLOC(idarray, size);
403 rc = llog_get_cat_list(obd, obd, name, count, idarray);
405 CERROR("rc: %d\n", rc);
409 rc = obd_llog_init(obd, olg->olg_group, obd, count, idarray, uuid);
411 CERROR("rc: %d\n", rc);
415 rc = llog_put_cat_list(obd, obd, name, count, idarray);
417 CERROR("rc: %d\n", rc);
423 OBD_VFREE(idarray, size);
426 EXPORT_SYMBOL(llog_cat_initialize);
428 int obd_llog_init(struct obd_device *obd, int group,
429 struct obd_device *disk_obd, int count,
430 struct llog_catid *logid, struct obd_uuid *uuid)
434 OBD_CHECK_DT_OP(obd, llog_init, 0);
435 OBD_COUNTER_INCREMENT(obd, llog_init);
437 rc = OBP(obd, llog_init)(obd, group, disk_obd, count, logid, uuid);
440 EXPORT_SYMBOL(obd_llog_init);
442 int obd_llog_finish(struct obd_device *obd, int count)
446 OBD_CHECK_DT_OP(obd, llog_finish, 0);
447 OBD_COUNTER_INCREMENT(obd, llog_finish);
449 rc = OBP(obd, llog_finish)(obd, count);
452 EXPORT_SYMBOL(obd_llog_finish);