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;
45 OBD_ALLOC(ctxt, sizeof(*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);
59 OBD_FREE(ctxt, sizeof(*ctxt));
63 int __llog_ctxt_put(struct llog_ctxt *ctxt)
65 struct obd_device *obd;
69 spin_lock(&obd->obd_dev_lock);
70 if (!atomic_dec_and_test(&ctxt->loc_refcount)) {
71 spin_unlock(&obd->obd_dev_lock);
74 obd->obd_llog_ctxt[ctxt->loc_idx] = NULL;
75 spin_unlock(&obd->obd_dev_lock);
77 LASSERT(obd->obd_stopping == 1);
78 /* cleanup the llog ctxt here */
79 if (CTXTP(ctxt, cleanup))
80 rc = CTXTP(ctxt, cleanup)(ctxt);
82 llog_ctxt_destroy(ctxt);
83 wake_up(&obd->obd_llog_waitq);
86 EXPORT_SYMBOL(__llog_ctxt_put);
88 int llog_cleanup(struct llog_ctxt *ctxt)
90 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
91 struct obd_device *obd = ctxt->loc_obd;
100 /*banlance the ctxt get when calling llog_cleanup */
103 /* sync with other llog ctxt user thread */
104 spin_lock(&obd->obd_dev_lock);
105 LASSERT(obd->obd_stopping == 1);
106 spin_unlock(&obd->obd_dev_lock);
109 /*try to free the ctxt */
110 rc = __llog_ctxt_put(ctxt);
112 l_wait_event(obd->obd_llog_waitq, llog_ctxt_null(obd, idx), &lwi);
116 EXPORT_SYMBOL(llog_cleanup);
118 int llog_setup(struct obd_device *obd, int index, struct obd_device *disk_obd,
119 int count, struct llog_logid *logid, struct llog_operations *op)
122 struct llog_ctxt *ctxt;
125 if (index < 0 || index >= LLOG_MAX_CTXTS)
128 ctxt = llog_get_context(obd, index);
130 /* mds_lov_update_mds might call here multiple times. So if the
131 llog is already set up then don't to do it again. */
132 CDEBUG(D_CONFIG, "obd %s ctxt %d already set up\n",
133 obd->obd_name, index);
134 LASSERT(ctxt->loc_obd == obd);
135 LASSERT(ctxt->loc_exp == disk_obd->obd_self_export);
136 LASSERT(ctxt->loc_logops == op);
140 ctxt = llog_new_ctxt(obd);
142 GOTO(out, rc = -ENOMEM);
144 obd->obd_llog_ctxt[index] = ctxt;
145 ctxt->loc_exp = class_export_get(disk_obd->obd_self_export);
146 ctxt->loc_idx = index;
147 ctxt->loc_logops = op;
148 sema_init(&ctxt->loc_sem, 1);
151 rc = op->lop_setup(obd, index, disk_obd, count, logid);
154 llog_ctxt_destroy(ctxt);
158 EXPORT_SYMBOL(llog_setup);
160 int llog_sync(struct llog_ctxt *ctxt, struct obd_export *exp)
168 if (CTXTP(ctxt, sync))
169 rc = CTXTP(ctxt, sync)(ctxt, exp);
173 EXPORT_SYMBOL(llog_sync);
175 int llog_add(struct llog_ctxt *ctxt, struct llog_rec_hdr *rec,
176 struct lov_stripe_md *lsm, struct llog_cookie *logcookies,
188 CTXT_CHECK_OP(ctxt, add, -EOPNOTSUPP);
189 cap = current->cap_effective;
190 cap_raise(current->cap_effective, CAP_SYS_RESOURCE);
191 rc = CTXTP(ctxt, add)(ctxt, rec, lsm, logcookies, numcookies);
192 current->cap_effective = cap;
195 EXPORT_SYMBOL(llog_add);
197 int llog_cancel(struct llog_ctxt *ctxt, struct lov_stripe_md *lsm,
198 int count, struct llog_cookie *cookies, int flags)
208 CTXT_CHECK_OP(ctxt, cancel, -EOPNOTSUPP);
209 rc = CTXTP(ctxt, cancel)(ctxt, lsm, count, cookies, flags);
212 EXPORT_SYMBOL(llog_cancel);
214 /* callback func for llog_process in llog_obd_origin_setup */
215 static int cat_cancel_cb(struct llog_handle *cathandle,
216 struct llog_rec_hdr *rec, void *data)
218 struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
219 struct llog_handle *loghandle;
220 struct llog_log_hdr *llh;
224 if (rec->lrh_type != LLOG_LOGID_MAGIC) {
225 CERROR("invalid record in catalog\n");
228 CDEBUG(D_HA, "processing log "LPX64":%x at index %u of catalog "
229 LPX64"\n", lir->lid_id.lgl_oid, lir->lid_id.lgl_ogen,
230 rec->lrh_index, cathandle->lgh_id.lgl_oid);
232 rc = llog_cat_id2handle(cathandle, &loghandle, &lir->lid_id);
234 CERROR("Cannot find handle for log "LPX64"\n",
235 lir->lid_id.lgl_oid);
239 llh = loghandle->lgh_hdr;
240 if ((llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
241 (llh->llh_count == 1)) {
242 rc = llog_destroy(loghandle);
244 CERROR("failure destroying log in postsetup: %d\n", rc);
246 index = loghandle->u.phd.phd_cookie.lgc_index;
247 llog_free_handle(loghandle);
250 llog_cat_set_first_idx(cathandle, index);
251 rc = llog_cancel_rec(cathandle, index);
253 CDEBUG(D_HA, "cancel log "LPX64":%x at index %u of "
254 "catalog "LPX64"\n", lir->lid_id.lgl_oid,
255 lir->lid_id.lgl_ogen, rec->lrh_index,
256 cathandle->lgh_id.lgl_oid);
262 /* lop_setup method for filter/osc */
263 // XXX how to set exports
264 int llog_obd_origin_setup(struct obd_device *obd, int index,
265 struct obd_device *disk_obd, int count,
266 struct llog_logid *logid)
268 struct llog_ctxt *ctxt;
269 struct llog_handle *handle;
270 struct lvfs_run_ctxt saved;
279 ctxt = llog_get_context(obd, index);
284 rc = llog_create(ctxt, &handle, logid, NULL);
286 rc = llog_create(ctxt, &handle, NULL, NULL);
288 *logid = handle->lgh_id;
293 ctxt->loc_handle = handle;
294 push_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
295 rc = llog_init_handle(handle, LLOG_F_IS_CAT, NULL);
296 pop_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
300 rc = llog_process(handle, (llog_cb_t)cat_cancel_cb, NULL, NULL);
302 CERROR("llog_process with cat_cancel_cb failed: %d\n", rc);
307 EXPORT_SYMBOL(llog_obd_origin_setup);
309 int llog_obd_origin_cleanup(struct llog_ctxt *ctxt)
311 struct llog_handle *cathandle, *n, *loghandle;
312 struct llog_log_hdr *llh;
319 cathandle = ctxt->loc_handle;
321 list_for_each_entry_safe(loghandle, n,
322 &cathandle->u.chd.chd_head,
324 llh = loghandle->lgh_hdr;
325 if ((llh->llh_flags &
326 LLOG_F_ZAP_WHEN_EMPTY) &&
327 (llh->llh_count == 1)) {
328 rc = llog_destroy(loghandle);
330 CERROR("failure destroying log during "
331 "cleanup: %d\n", rc);
333 index = loghandle->u.phd.phd_cookie.lgc_index;
334 llog_free_handle(loghandle);
337 llog_cat_set_first_idx(cathandle, index);
338 rc = llog_cancel_rec(cathandle, index);
340 CDEBUG(D_RPCTRACE, "cancel plain log at"
341 "index %u of catalog "LPX64"\n",
342 index,cathandle->lgh_id.lgl_oid);
345 llog_cat_put(ctxt->loc_handle);
349 EXPORT_SYMBOL(llog_obd_origin_cleanup);
351 /* add for obdfilter/sz and mds/unlink */
352 int llog_obd_origin_add(struct llog_ctxt *ctxt,
353 struct llog_rec_hdr *rec, struct lov_stripe_md *lsm,
354 struct llog_cookie *logcookies, int numcookies)
356 struct llog_handle *cathandle;
360 cathandle = ctxt->loc_handle;
361 LASSERT(cathandle != NULL);
362 rc = llog_cat_add_rec(cathandle, rec, logcookies, NULL);
364 CERROR("write one catalog record failed: %d\n", rc);
367 EXPORT_SYMBOL(llog_obd_origin_add);
369 int llog_cat_initialize(struct obd_device *obd, int count,
370 struct obd_uuid *uuid)
372 char name[32] = CATLIST;
373 struct llog_catid *idarray = NULL;
374 int size = sizeof(*idarray) * count;
379 OBD_VMALLOC(idarray, size);
384 rc = llog_get_cat_list(obd, obd, name, count, idarray);
386 CERROR("rc: %d\n", rc);
390 rc = obd_llog_init(obd, obd, count, idarray, uuid);
392 CERROR("rc: %d\n", rc);
396 rc = llog_put_cat_list(obd, obd, name, count, idarray);
398 CERROR("rc: %d\n", rc);
404 OBD_VFREE(idarray, size);
407 EXPORT_SYMBOL(llog_cat_initialize);
409 int obd_llog_init(struct obd_device *obd, struct obd_device *disk_obd,
410 int count, struct llog_catid *logid, struct obd_uuid *uuid)
414 OBD_CHECK_OP(obd, llog_init, 0);
415 OBD_COUNTER_INCREMENT(obd, llog_init);
417 rc = OBP(obd, llog_init)(obd, disk_obd, count, logid, uuid);
420 EXPORT_SYMBOL(obd_llog_init);
422 int obd_llog_finish(struct obd_device *obd, int count)
426 OBD_CHECK_OP(obd, llog_finish, 0);
427 OBD_COUNTER_INCREMENT(obd, llog_finish);
429 rc = OBP(obd, llog_finish)(obd, count);
432 EXPORT_SYMBOL(obd_llog_finish);