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).
16 * You should have received a copy of the GNU General Public License
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) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2012, 2013, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/include/lustre_log.h
38 * Generic infrastructure for managing a collection of logs.
39 * These logs are used for:
41 * - orphan recovery: OST adds record on create
42 * - mtime/size consistency: the OST adds a record on first write
43 * - open/unlinked objects: OST adds a record on destroy
45 * - mds unlink log: the MDS adds an entry upon delete
47 * - raid1 replication log between OST's
48 * - MDS replication logs
59 #if defined(__linux__)
60 #include <linux/lustre_log.h>
61 #elif defined(__APPLE__)
62 #include <darwin/lustre_log.h>
63 #elif defined(__WINNT__)
64 #include <winnt/lustre_log.h>
66 #error Unsupported operating system.
69 #include <obd_class.h>
71 #include <lustre/lustre_idl.h>
72 #include <dt_object.h>
74 #define LOG_NAME_LIMIT(logname, name) \
75 snprintf(logname, sizeof(logname), "LOGS/%s", name)
76 #define LLOG_EEMPTY 4711
78 enum llog_open_param {
79 LLOG_OPEN_EXISTS = 0x0000,
80 LLOG_OPEN_NEW = 0x0001,
83 struct plain_handle_data {
85 struct llog_handle *phd_cat_handle;
86 struct llog_cookie phd_cookie; /* cookie of this log in its cat */
89 struct cat_handle_data {
91 struct llog_handle *chd_current_log; /* currently open log */
92 struct llog_handle *chd_next_log; /* llog to be used next */
95 static inline void logid_to_fid(struct llog_logid *id, struct lu_fid *fid)
97 /* For compatibility purposes we identify pre-OSD (~< 2.3.51 MDS)
98 * logid's by non-zero ogen (inode generation) and convert them
100 if (id->lgl_ogen == 0) {
101 fid->f_seq = id->lgl_oi.oi.oi_seq;
102 fid->f_oid = id->lgl_oi.oi.oi_id;
105 lu_igif_build(fid, id->lgl_oi.oi.oi_id, id->lgl_ogen);
109 static inline void fid_to_logid(struct lu_fid *fid, struct llog_logid *id)
111 id->lgl_oi.oi.oi_seq = fid->f_seq;
112 id->lgl_oi.oi.oi_id = fid->f_oid;
116 static inline void logid_set_id(struct llog_logid *log_id, __u64 id)
118 log_id->lgl_oi.oi.oi_id = id;
121 static inline __u64 logid_id(struct llog_logid *log_id)
123 return log_id->lgl_oi.oi.oi_id;
128 /* llog.c - general API */
129 int llog_init_handle(const struct lu_env *env, struct llog_handle *handle,
130 int flags, struct obd_uuid *uuid);
131 int llog_copy_handler(const struct lu_env *env, struct llog_handle *llh,
132 struct llog_rec_hdr *rec, void *data);
133 int llog_process(const struct lu_env *env, struct llog_handle *loghandle,
134 llog_cb_t cb, void *data, void *catdata);
135 int llog_process_or_fork(const struct lu_env *env,
136 struct llog_handle *loghandle,
137 llog_cb_t cb, void *data, void *catdata, bool fork);
138 int llog_reverse_process(const struct lu_env *env,
139 struct llog_handle *loghandle, llog_cb_t cb,
140 void *data, void *catdata);
141 int llog_cancel_rec(const struct lu_env *env, struct llog_handle *loghandle,
143 int llog_open(const struct lu_env *env, struct llog_ctxt *ctxt,
144 struct llog_handle **lgh, struct llog_logid *logid,
145 char *name, enum llog_open_param open_param);
146 int llog_close(const struct lu_env *env, struct llog_handle *cathandle);
147 int llog_is_empty(const struct lu_env *env, struct llog_ctxt *ctxt,
149 int llog_backup(const struct lu_env *env, struct obd_device *obd,
150 struct llog_ctxt *ctxt, struct llog_ctxt *bak_ctxt,
151 char *name, char *backup);
153 /* llog_process flags */
154 #define LLOG_FLAG_NODEAMON 0x0001
156 /* llog_cat.c - catalog api */
157 struct llog_process_data {
159 * Any useful data needed while processing catalog. This is
160 * passed later to process callback.
164 * Catalog process callback function, called for each record
169 * Start processing the catalog from startcat/startidx
175 struct llog_process_cat_data {
177 * Temporary stored first_idx while scanning log.
181 * Temporary stored last_idx while scanning log.
186 int llog_cat_close(const struct lu_env *env, struct llog_handle *cathandle);
187 int llog_cat_add_rec(const struct lu_env *env, struct llog_handle *cathandle,
188 struct llog_rec_hdr *rec, struct llog_cookie *reccookie,
189 void *buf, struct thandle *th);
190 int llog_cat_declare_add_rec(const struct lu_env *env,
191 struct llog_handle *cathandle,
192 struct llog_rec_hdr *rec, struct thandle *th);
193 int llog_cat_add(const struct lu_env *env, struct llog_handle *cathandle,
194 struct llog_rec_hdr *rec, struct llog_cookie *reccookie,
196 int llog_cat_cancel_records(const struct lu_env *env,
197 struct llog_handle *cathandle, int count,
198 struct llog_cookie *cookies);
199 int llog_cat_process_or_fork(const struct lu_env *env,
200 struct llog_handle *cat_llh, llog_cb_t cb,
201 void *data, int startcat, int startidx, bool fork);
202 int llog_cat_process(const struct lu_env *env, struct llog_handle *cat_llh,
203 llog_cb_t cb, void *data, int startcat, int startidx);
204 int llog_cat_reverse_process(const struct lu_env *env,
205 struct llog_handle *cat_llh, llog_cb_t cb,
207 int llog_cat_init_and_process(const struct lu_env *env,
208 struct llog_handle *llh);
211 int llog_setup(const struct lu_env *env, struct obd_device *obd,
212 struct obd_llog_group *olg, int index,
213 struct obd_device *disk_obd, struct llog_operations *op);
214 int __llog_ctxt_put(const struct lu_env *env, struct llog_ctxt *ctxt);
215 int llog_cleanup(const struct lu_env *env, struct llog_ctxt *);
216 int llog_sync(struct llog_ctxt *ctxt, struct obd_export *exp, int flags);
217 int llog_obd_add(const struct lu_env *env, struct llog_ctxt *ctxt,
218 struct llog_rec_hdr *rec, struct lov_stripe_md *lsm,
219 struct llog_cookie *logcookies, int numcookies);
220 int llog_cancel(const struct lu_env *env, struct llog_ctxt *ctxt,
221 struct lov_stripe_md *lsm, int count,
222 struct llog_cookie *cookies, int flags);
224 int obd_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
225 struct obd_device *disk_obd, int *idx);
227 int obd_llog_finish(struct obd_device *obd, int count);
230 int llog_ioctl(const struct lu_env *env, struct llog_ctxt *ctxt, int cmd,
231 struct obd_ioctl_data *data);
232 int llog_catalog_list(const struct lu_env *env, struct dt_device *d,
233 int count, struct obd_ioctl_data *data,
234 const struct lu_fid *fid);
237 int llog_initiator_connect(struct llog_ctxt *ctxt);
239 struct llog_operations {
240 int (*lop_destroy)(const struct lu_env *env,
241 struct llog_handle *handle);
242 int (*lop_next_block)(const struct lu_env *env, struct llog_handle *h,
243 int *curr_idx, int next_idx, __u64 *offset,
245 int (*lop_prev_block)(const struct lu_env *env, struct llog_handle *h,
246 int prev_idx, void *buf, int len);
247 int (*lop_read_header)(const struct lu_env *env,
248 struct llog_handle *handle);
249 int (*lop_setup)(const struct lu_env *env, struct obd_device *obd,
250 struct obd_llog_group *olg, int ctxt_idx,
251 struct obd_device *disk_obd);
252 int (*lop_sync)(struct llog_ctxt *ctxt, struct obd_export *exp,
254 int (*lop_cleanup)(const struct lu_env *env, struct llog_ctxt *ctxt);
255 int (*lop_cancel)(const struct lu_env *env, struct llog_ctxt *ctxt,
256 struct lov_stripe_md *lsm, int count,
257 struct llog_cookie *cookies, int flags);
258 int (*lop_connect)(struct llog_ctxt *ctxt, struct llog_logid *logid,
259 struct llog_gen *gen, struct obd_uuid *uuid);
261 * Any llog file must be opened first using llog_open(). Llog can be
262 * opened by name, logid or without both, in last case the new logid
265 int (*lop_open)(const struct lu_env *env, struct llog_handle *lgh,
266 struct llog_logid *logid, char *name,
267 enum llog_open_param);
269 * Opened llog may not exist and this must be checked where needed using
270 * the llog_exist() call.
272 int (*lop_exist)(struct llog_handle *lgh);
274 * Close llog file and calls llog_free_handle() implicitly.
275 * Any opened llog must be closed by llog_close() call.
277 int (*lop_close)(const struct lu_env *env, struct llog_handle *handle);
279 * Create new llog file. The llog must be opened.
280 * Must be used only for local llog operations.
282 int (*lop_declare_create)(const struct lu_env *env,
283 struct llog_handle *handle,
285 int (*lop_create)(const struct lu_env *env, struct llog_handle *handle,
288 * write new record in llog. It appends records usually but can edit
289 * existing records too.
291 int (*lop_declare_write_rec)(const struct lu_env *env,
292 struct llog_handle *lgh,
293 struct llog_rec_hdr *rec,
294 int idx, struct thandle *th);
295 int (*lop_write_rec)(const struct lu_env *env,
296 struct llog_handle *loghandle,
297 struct llog_rec_hdr *rec,
298 struct llog_cookie *cookie, int cookiecount,
299 void *buf, int idx, struct thandle *th);
301 * Add new record in llog catalog. Does the same as llog_write_rec()
302 * but using llog catalog.
304 int (*lop_declare_add)(const struct lu_env *env,
305 struct llog_handle *lgh,
306 struct llog_rec_hdr *rec, struct thandle *th);
307 int (*lop_add)(const struct lu_env *env, struct llog_handle *lgh,
308 struct llog_rec_hdr *rec, struct llog_cookie *cookie,
309 void *buf, struct thandle *th);
310 /* Old llog_add version, used in MDS-LOV-OSC now and will gone with
311 * LOD/OSP replacement */
312 int (*lop_obd_add)(const struct lu_env *env, struct llog_ctxt *ctxt,
313 struct llog_rec_hdr *rec, struct lov_stripe_md *lsm,
314 struct llog_cookie *logcookies, int numcookies);
317 /* In-memory descriptor for a log object or log catalog */
319 struct rw_semaphore lgh_lock;
320 spinlock_t lgh_hdr_lock; /* protect lgh_hdr data */
321 struct llog_logid lgh_id; /* id of this log */
322 struct llog_log_hdr *lgh_hdr;
323 struct dt_object *lgh_obj;
325 int lgh_cur_idx; /* used during llog_process */
326 __u64 lgh_cur_offset; /* used during llog_process */
327 struct llog_ctxt *lgh_ctxt;
329 struct plain_handle_data phd;
330 struct cat_handle_data chd;
334 struct llog_operations *lgh_logops;
335 atomic_t lgh_refcount;
339 extern struct llog_operations llog_osd_ops;
340 int llog_osd_get_cat_list(const struct lu_env *env, struct dt_device *d,
341 int idx, int count, struct llog_catid *idarray,
342 const struct lu_fid *fid);
343 int llog_osd_put_cat_list(const struct lu_env *env, struct dt_device *d,
344 int idx, int count, struct llog_catid *idarray,
345 const struct lu_fid *fid);
347 #define LLOG_CTXT_FLAG_UNINITIALIZED 0x00000001
348 #define LLOG_CTXT_FLAG_STOP 0x00000002
351 int loc_idx; /* my index the obd array of ctxt's */
352 struct obd_device *loc_obd; /* points back to the containing obd*/
353 struct obd_llog_group *loc_olg; /* group containing that ctxt */
354 struct obd_export *loc_exp; /* parent "disk" export (e.g. MDS) */
355 struct obd_import *loc_imp; /* to use in RPC's: can be backward
357 struct llog_operations *loc_logops;
358 struct llog_handle *loc_handle;
359 struct mutex loc_mutex; /* protect loc_imp */
360 atomic_t loc_refcount;
361 long loc_flags; /* flags, see above defines */
362 struct dt_object *loc_dir;
365 #define LLOG_PROC_BREAK 0x0001
366 #define LLOG_DEL_RECORD 0x0002
368 static inline int llog_obd2ops(struct llog_ctxt *ctxt,
369 struct llog_operations **lop)
374 *lop = ctxt->loc_logops;
381 static inline int llog_handle2ops(struct llog_handle *loghandle,
382 struct llog_operations **lop)
384 if (loghandle == NULL || loghandle->lgh_logops == NULL)
387 *lop = loghandle->lgh_logops;
391 static inline int llog_data_len(int len)
393 return cfs_size_round(len);
396 static inline int llog_get_size(struct llog_handle *loghandle)
398 if (loghandle && loghandle->lgh_hdr)
399 return loghandle->lgh_hdr->llh_count;
403 static inline struct llog_ctxt *llog_ctxt_get(struct llog_ctxt *ctxt)
405 atomic_inc(&ctxt->loc_refcount);
406 CDEBUG(D_INFO, "GETting ctxt %p : new refcount %d\n", ctxt,
407 atomic_read(&ctxt->loc_refcount));
411 static inline void llog_ctxt_put(struct llog_ctxt *ctxt)
415 LASSERT_ATOMIC_GT_LT(&ctxt->loc_refcount, 0, LI_POISON);
416 CDEBUG(D_INFO, "PUTting ctxt %p : new refcount %d\n", ctxt,
417 atomic_read(&ctxt->loc_refcount) - 1);
418 __llog_ctxt_put(NULL, ctxt);
421 static inline void llog_group_init(struct obd_llog_group *olg, int group)
423 init_waitqueue_head(&olg->olg_waitq);
424 spin_lock_init(&olg->olg_lock);
425 mutex_init(&olg->olg_cat_processing);
426 olg->olg_seq = group;
429 static inline int llog_group_set_ctxt(struct obd_llog_group *olg,
430 struct llog_ctxt *ctxt, int index)
432 LASSERT(index >= 0 && index < LLOG_MAX_CTXTS);
434 spin_lock(&olg->olg_lock);
435 if (olg->olg_ctxts[index] != NULL) {
436 spin_unlock(&olg->olg_lock);
439 olg->olg_ctxts[index] = ctxt;
440 spin_unlock(&olg->olg_lock);
444 static inline struct llog_ctxt *llog_group_get_ctxt(struct obd_llog_group *olg,
447 struct llog_ctxt *ctxt;
449 LASSERT(index >= 0 && index < LLOG_MAX_CTXTS);
451 spin_lock(&olg->olg_lock);
452 if (olg->olg_ctxts[index] == NULL)
455 ctxt = llog_ctxt_get(olg->olg_ctxts[index]);
456 spin_unlock(&olg->olg_lock);
460 static inline void llog_group_clear_ctxt(struct obd_llog_group *olg, int index)
462 LASSERT(index >= 0 && index < LLOG_MAX_CTXTS);
463 spin_lock(&olg->olg_lock);
464 olg->olg_ctxts[index] = NULL;
465 spin_unlock(&olg->olg_lock);
468 static inline struct llog_ctxt *llog_get_context(struct obd_device *obd,
471 return llog_group_get_ctxt(&obd->obd_olg, index);
474 static inline int llog_group_ctxt_null(struct obd_llog_group *olg, int index)
476 return (olg->olg_ctxts[index] == NULL);
479 static inline int llog_ctxt_null(struct obd_device *obd, int index)
481 return (llog_group_ctxt_null(&obd->obd_olg, index));
484 static inline int llog_destroy(const struct lu_env *env,
485 struct llog_handle *handle)
487 struct llog_operations *lop;
492 rc = llog_handle2ops(handle, &lop);
495 if (lop->lop_destroy == NULL)
498 rc = lop->lop_destroy(env, handle);
502 static inline int llog_next_block(const struct lu_env *env,
503 struct llog_handle *loghandle, int *cur_idx,
504 int next_idx, __u64 *cur_offset, void *buf,
507 struct llog_operations *lop;
512 rc = llog_handle2ops(loghandle, &lop);
515 if (lop->lop_next_block == NULL)
518 rc = lop->lop_next_block(env, loghandle, cur_idx, next_idx,
519 cur_offset, buf, len);
523 static inline int llog_prev_block(const struct lu_env *env,
524 struct llog_handle *loghandle,
525 int prev_idx, void *buf, int len)
527 struct llog_operations *lop;
532 rc = llog_handle2ops(loghandle, &lop);
535 if (lop->lop_prev_block == NULL)
538 rc = lop->lop_prev_block(env, loghandle, prev_idx, buf, len);
542 static inline int llog_connect(struct llog_ctxt *ctxt,
543 struct llog_logid *logid, struct llog_gen *gen,
544 struct obd_uuid *uuid)
546 struct llog_operations *lop;
551 rc = llog_obd2ops(ctxt, &lop);
554 if (lop->lop_connect == NULL)
557 rc = lop->lop_connect(ctxt, logid, gen, uuid);
562 int llog_exist(struct llog_handle *loghandle);
563 int llog_declare_create(const struct lu_env *env,
564 struct llog_handle *loghandle, struct thandle *th);
565 int llog_create(const struct lu_env *env, struct llog_handle *handle,
567 int llog_declare_write_rec(const struct lu_env *env,
568 struct llog_handle *handle,
569 struct llog_rec_hdr *rec, int idx,
571 int llog_write_rec(const struct lu_env *env, struct llog_handle *handle,
572 struct llog_rec_hdr *rec, struct llog_cookie *logcookies,
573 int numcookies, void *buf, int idx, struct thandle *th);
574 int llog_add(const struct lu_env *env, struct llog_handle *lgh,
575 struct llog_rec_hdr *rec, struct llog_cookie *logcookies,
576 void *buf, struct thandle *th);
577 int llog_declare_add(const struct lu_env *env, struct llog_handle *lgh,
578 struct llog_rec_hdr *rec, struct thandle *th);
579 int lustre_process_log(struct super_block *sb, char *logname,
580 struct config_llog_instance *cfg);
581 int lustre_end_log(struct super_block *sb, char *logname,
582 struct config_llog_instance *cfg);
583 int llog_open_create(const struct lu_env *env, struct llog_ctxt *ctxt,
584 struct llog_handle **res, struct llog_logid *logid,
586 int llog_erase(const struct lu_env *env, struct llog_ctxt *ctxt,
587 struct llog_logid *logid, char *name);
588 int llog_write(const struct lu_env *env, struct llog_handle *loghandle,
589 struct llog_rec_hdr *rec, struct llog_cookie *reccookie,
590 int cookiecount, void *buf, int idx);