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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2015, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
31 * lustre/include/lustre_log.h
33 * Generic infrastructure for managing a collection of logs.
34 * These logs are used for:
36 * - orphan recovery: OST adds record on create
37 * - mtime/size consistency: the OST adds a record on first write
38 * - open/unlinked objects: OST adds a record on destroy
40 * - mds unlink log: the MDS adds an entry upon delete
42 * - raid1 replication log between OST's
43 * - MDS replication logs
54 #include <obd_class.h>
55 #include <lustre/lustre_idl.h>
56 #include <dt_object.h>
57 #include <lustre_log_user.h>
59 #define LOG_NAME_LIMIT(logname, name) \
60 snprintf(logname, sizeof(logname), "LOGS/%s", name)
61 #define LLOG_EEMPTY 4711
63 enum llog_open_param {
64 LLOG_OPEN_EXISTS = 0x0000,
65 LLOG_OPEN_NEW = 0x0001,
68 struct plain_handle_data {
69 struct list_head phd_entry;
70 struct llog_handle *phd_cat_handle;
71 /* cookie of this log in its cat */
72 struct llog_cookie phd_cookie;
75 struct cat_handle_data {
76 struct list_head chd_head;
77 struct llog_handle *chd_current_log;/* currently open log */
78 struct llog_handle *chd_next_log; /* llog to be used next */
83 /* llog.c - general API */
84 int llog_init_handle(const struct lu_env *env, struct llog_handle *handle,
85 int flags, struct obd_uuid *uuid);
86 int llog_copy_handler(const struct lu_env *env, struct llog_handle *llh,
87 struct llog_rec_hdr *rec, void *data);
88 int llog_process(const struct lu_env *env, struct llog_handle *loghandle,
89 llog_cb_t cb, void *data, void *catdata);
90 int llog_process_or_fork(const struct lu_env *env,
91 struct llog_handle *loghandle,
92 llog_cb_t cb, void *data, void *catdata, bool fork);
93 int llog_reverse_process(const struct lu_env *env,
94 struct llog_handle *loghandle, llog_cb_t cb,
95 void *data, void *catdata);
96 int llog_cancel_rec(const struct lu_env *env, struct llog_handle *loghandle,
98 int llog_open(const struct lu_env *env, struct llog_ctxt *ctxt,
99 struct llog_handle **lgh, struct llog_logid *logid,
100 char *name, enum llog_open_param open_param);
101 int llog_close(const struct lu_env *env, struct llog_handle *cathandle);
102 int llog_is_empty(const struct lu_env *env, struct llog_ctxt *ctxt,
104 int llog_backup(const struct lu_env *env, struct obd_device *obd,
105 struct llog_ctxt *ctxt, struct llog_ctxt *bak_ctxt,
106 char *name, char *backup);
108 /* llog_process flags */
109 #define LLOG_FLAG_NODEAMON 0x0001
111 /* llog_cat.c - catalog api */
112 struct llog_process_data {
114 * Any useful data needed while processing catalog. This is
115 * passed later to process callback.
119 * Catalog process callback function, called for each record
124 * Start processing the catalog from startcat/startidx
130 struct llog_process_cat_data {
132 * Temporary stored first_idx while scanning log.
136 * Temporary stored last_idx while scanning log.
141 int llog_cat_close(const struct lu_env *env, struct llog_handle *cathandle);
142 int llog_cat_add_rec(const struct lu_env *env, struct llog_handle *cathandle,
143 struct llog_rec_hdr *rec, struct llog_cookie *reccookie,
145 int llog_cat_declare_add_rec(const struct lu_env *env,
146 struct llog_handle *cathandle,
147 struct llog_rec_hdr *rec, struct thandle *th);
148 int llog_cat_add(const struct lu_env *env, struct llog_handle *cathandle,
149 struct llog_rec_hdr *rec, struct llog_cookie *reccookie);
150 int llog_cat_cancel_records(const struct lu_env *env,
151 struct llog_handle *cathandle, int count,
152 struct llog_cookie *cookies);
153 int llog_cat_process_or_fork(const struct lu_env *env,
154 struct llog_handle *cat_llh, llog_cb_t cb,
155 void *data, int startcat, int startidx, bool fork);
156 int llog_cat_process(const struct lu_env *env, struct llog_handle *cat_llh,
157 llog_cb_t cb, void *data, int startcat, int startidx);
158 int llog_cat_reverse_process(const struct lu_env *env,
159 struct llog_handle *cat_llh, llog_cb_t cb,
161 int llog_cat_init_and_process(const struct lu_env *env,
162 struct llog_handle *llh);
165 int llog_setup(const struct lu_env *env, struct obd_device *obd,
166 struct obd_llog_group *olg, int index,
167 struct obd_device *disk_obd, struct llog_operations *op);
168 int __llog_ctxt_put(const struct lu_env *env, struct llog_ctxt *ctxt);
169 int llog_cleanup(const struct lu_env *env, struct llog_ctxt *);
170 int llog_sync(struct llog_ctxt *ctxt, struct obd_export *exp, int flags);
171 int llog_cancel(const struct lu_env *env, struct llog_ctxt *ctxt,
172 struct llog_cookie *cookies, int flags);
175 struct obd_ioctl_data;
176 int llog_ioctl(const struct lu_env *env, struct llog_ctxt *ctxt, int cmd,
177 struct obd_ioctl_data *data);
178 int llog_catalog_list(const struct lu_env *env, struct dt_device *d,
179 int count, struct obd_ioctl_data *data,
180 const struct lu_fid *fid);
183 int llog_initiator_connect(struct llog_ctxt *ctxt);
185 struct llog_operations {
186 int (*lop_declare_destroy)(const struct lu_env *env,
187 struct llog_handle *handle, struct thandle *th);
188 int (*lop_destroy)(const struct lu_env *env,
189 struct llog_handle *handle, struct thandle *th);
190 int (*lop_next_block)(const struct lu_env *env, struct llog_handle *h,
191 int *curr_idx, int next_idx, __u64 *offset,
193 int (*lop_prev_block)(const struct lu_env *env, struct llog_handle *h,
194 int prev_idx, void *buf, int len);
195 int (*lop_read_header)(const struct lu_env *env,
196 struct llog_handle *handle);
197 int (*lop_setup)(const struct lu_env *env, struct obd_device *obd,
198 struct obd_llog_group *olg, int ctxt_idx,
199 struct obd_device *disk_obd);
200 int (*lop_sync)(struct llog_ctxt *ctxt, struct obd_export *exp,
202 int (*lop_cleanup)(const struct lu_env *env, struct llog_ctxt *ctxt);
203 int (*lop_cancel)(const struct lu_env *env, struct llog_ctxt *ctxt,
204 struct llog_cookie *cookies, int flags);
205 int (*lop_connect)(struct llog_ctxt *ctxt, struct llog_logid *logid,
206 struct llog_gen *gen, struct obd_uuid *uuid);
208 * Any llog file must be opened first using llog_open(). Llog can be
209 * opened by name, logid or without both, in last case the new logid
212 int (*lop_open)(const struct lu_env *env, struct llog_handle *lgh,
213 struct llog_logid *logid, char *name,
214 enum llog_open_param);
216 * Opened llog may not exist and this must be checked where needed using
217 * the llog_exist() call.
219 int (*lop_exist)(struct llog_handle *lgh);
221 * Close llog file and calls llog_free_handle() implicitly.
222 * Any opened llog must be closed by llog_close() call.
224 int (*lop_close)(const struct lu_env *env, struct llog_handle *handle);
226 * Create new llog file. The llog must be opened.
227 * Must be used only for local llog operations.
229 int (*lop_declare_create)(const struct lu_env *env,
230 struct llog_handle *handle,
232 int (*lop_create)(const struct lu_env *env, struct llog_handle *handle,
235 * write new record in llog. It appends records usually but can edit
236 * existing records too.
238 int (*lop_declare_write_rec)(const struct lu_env *env,
239 struct llog_handle *lgh,
240 struct llog_rec_hdr *rec,
241 int idx, struct thandle *th);
242 int (*lop_write_rec)(const struct lu_env *env,
243 struct llog_handle *loghandle,
244 struct llog_rec_hdr *rec,
245 struct llog_cookie *cookie,
246 int idx, struct thandle *th);
248 * Add new record in llog catalog. Does the same as llog_write_rec()
249 * but using llog catalog.
251 int (*lop_declare_add)(const struct lu_env *env,
252 struct llog_handle *lgh,
253 struct llog_rec_hdr *rec, struct thandle *th);
254 int (*lop_add)(const struct lu_env *env, struct llog_handle *lgh,
255 struct llog_rec_hdr *rec, struct llog_cookie *cookie,
259 /* In-memory descriptor for a log object or log catalog */
261 struct rw_semaphore lgh_lock;
262 struct mutex lgh_hdr_mutex; /* protect lgh_hdr data */
263 struct llog_logid lgh_id; /* id of this log */
264 struct llog_log_hdr *lgh_hdr;
266 struct dt_object *lgh_obj;
267 /* For a Catalog, is the last/newest used index for a plain slot.
268 * Used in conjunction with llh_cat_idx to handle Catalog wrap-around
269 * case, after it will have reached LLOG_HDR_BITMAP_SIZE, llh_cat_idx
270 * will become its upper limit */
272 int lgh_cur_idx; /* used during llog_process */
273 __u64 lgh_cur_offset; /* used during llog_process */
274 struct llog_ctxt *lgh_ctxt;
276 struct plain_handle_data phd;
277 struct cat_handle_data chd;
281 struct llog_operations *lgh_logops;
282 atomic_t lgh_refcount;
286 extern struct llog_operations llog_osd_ops;
287 extern struct llog_operations llog_common_cat_ops;
288 int llog_osd_get_cat_list(const struct lu_env *env, struct dt_device *d,
289 int idx, int count, struct llog_catid *idarray,
290 const struct lu_fid *fid);
291 int llog_osd_put_cat_list(const struct lu_env *env, struct dt_device *d,
292 int idx, int count, struct llog_catid *idarray,
293 const struct lu_fid *fid);
295 #define LLOG_CTXT_FLAG_UNINITIALIZED 0x00000001
296 #define LLOG_CTXT_FLAG_STOP 0x00000002
298 /* Indicate the llog objects under this context are normal FID objects,
299 * instead of objects with local FID. */
300 #define LLOG_CTXT_FLAG_NORMAL_FID 0x00000004
303 int loc_idx; /* my index the obd array of ctxt's */
304 struct obd_device *loc_obd; /* points back to the containing obd*/
305 struct obd_llog_group *loc_olg; /* group containing that ctxt */
306 struct obd_export *loc_exp; /* parent "disk" export (e.g. MDS) */
307 struct obd_import *loc_imp; /* to use in RPC's: can be backward
309 struct llog_operations *loc_logops;
310 struct llog_handle *loc_handle;
311 struct mutex loc_mutex; /* protect loc_imp */
312 atomic_t loc_refcount;
313 long loc_flags; /* flags, see above defines */
314 struct dt_object *loc_dir;
315 struct local_oid_storage *loc_los_nameless;
316 struct local_oid_storage *loc_los_named;
317 /* llog chunk size, and llog record size can not be bigger than
319 __u32 loc_chunk_size;
322 #define LLOG_PROC_BREAK 0x0001
323 #define LLOG_DEL_RECORD 0x0002
324 #define LLOG_DEL_PLAIN 0x0003
326 static inline int llog_obd2ops(struct llog_ctxt *ctxt,
327 struct llog_operations **lop)
332 *lop = ctxt->loc_logops;
339 static inline int llog_handle2ops(struct llog_handle *loghandle,
340 struct llog_operations **lop)
342 if (loghandle == NULL || loghandle->lgh_logops == NULL)
345 *lop = loghandle->lgh_logops;
349 static inline int llog_data_len(int len)
351 return cfs_size_round(len);
354 static inline int llog_get_size(struct llog_handle *loghandle)
356 if (loghandle && loghandle->lgh_hdr)
357 return loghandle->lgh_hdr->llh_count;
361 static inline struct llog_ctxt *llog_ctxt_get(struct llog_ctxt *ctxt)
363 atomic_inc(&ctxt->loc_refcount);
364 CDEBUG(D_INFO, "GETting ctxt %p : new refcount %d\n", ctxt,
365 atomic_read(&ctxt->loc_refcount));
369 static inline void llog_ctxt_put(struct llog_ctxt *ctxt)
373 LASSERT_ATOMIC_GT_LT(&ctxt->loc_refcount, 0, LI_POISON);
374 CDEBUG(D_INFO, "PUTting ctxt %p : new refcount %d\n", ctxt,
375 atomic_read(&ctxt->loc_refcount) - 1);
376 __llog_ctxt_put(NULL, ctxt);
379 static inline void llog_group_init(struct obd_llog_group *olg)
381 init_waitqueue_head(&olg->olg_waitq);
382 spin_lock_init(&olg->olg_lock);
383 mutex_init(&olg->olg_cat_processing);
386 static inline int llog_group_set_ctxt(struct obd_llog_group *olg,
387 struct llog_ctxt *ctxt, int index)
389 LASSERT(index >= 0 && index < LLOG_MAX_CTXTS);
391 spin_lock(&olg->olg_lock);
392 if (olg->olg_ctxts[index] != NULL) {
393 spin_unlock(&olg->olg_lock);
396 olg->olg_ctxts[index] = ctxt;
397 spin_unlock(&olg->olg_lock);
401 static inline struct llog_ctxt *llog_group_get_ctxt(struct obd_llog_group *olg,
404 struct llog_ctxt *ctxt;
406 LASSERT(index >= 0 && index < LLOG_MAX_CTXTS);
408 spin_lock(&olg->olg_lock);
409 if (olg->olg_ctxts[index] == NULL)
412 ctxt = llog_ctxt_get(olg->olg_ctxts[index]);
413 spin_unlock(&olg->olg_lock);
417 static inline void llog_group_clear_ctxt(struct obd_llog_group *olg, int index)
419 LASSERT(index >= 0 && index < LLOG_MAX_CTXTS);
420 spin_lock(&olg->olg_lock);
421 olg->olg_ctxts[index] = NULL;
422 spin_unlock(&olg->olg_lock);
425 static inline struct llog_ctxt *llog_get_context(struct obd_device *obd,
428 return llog_group_get_ctxt(&obd->obd_olg, index);
431 static inline int llog_group_ctxt_null(struct obd_llog_group *olg, int index)
433 return (olg->olg_ctxts[index] == NULL);
436 static inline int llog_ctxt_null(struct obd_device *obd, int index)
438 return (llog_group_ctxt_null(&obd->obd_olg, index));
441 static inline int llog_next_block(const struct lu_env *env,
442 struct llog_handle *loghandle, int *cur_idx,
443 int next_idx, __u64 *cur_offset, void *buf,
446 struct llog_operations *lop;
451 rc = llog_handle2ops(loghandle, &lop);
454 if (lop->lop_next_block == NULL)
457 rc = lop->lop_next_block(env, loghandle, cur_idx, next_idx,
458 cur_offset, buf, len);
462 static inline int llog_prev_block(const struct lu_env *env,
463 struct llog_handle *loghandle,
464 int prev_idx, void *buf, int len)
466 struct llog_operations *lop;
471 rc = llog_handle2ops(loghandle, &lop);
474 if (lop->lop_prev_block == NULL)
477 rc = lop->lop_prev_block(env, loghandle, prev_idx, buf, len);
481 static inline int llog_connect(struct llog_ctxt *ctxt,
482 struct llog_logid *logid, struct llog_gen *gen,
483 struct obd_uuid *uuid)
485 struct llog_operations *lop;
490 rc = llog_obd2ops(ctxt, &lop);
493 if (lop->lop_connect == NULL)
496 rc = lop->lop_connect(ctxt, logid, gen, uuid);
500 static inline int llog_is_full(struct llog_handle *llh)
502 return llh->lgh_last_idx >= LLOG_HDR_BITMAP_SIZE(llh->lgh_hdr) - 1;
505 struct llog_cfg_rec {
506 struct llog_rec_hdr lcr_hdr;
507 struct lustre_cfg lcr_cfg;
508 struct llog_rec_tail lcr_tail;
511 struct llog_cfg_rec *lustre_cfg_rec_new(int cmd, struct lustre_cfg_bufs *bufs);
512 void lustre_cfg_rec_free(struct llog_cfg_rec *lcr);
520 int llog_exist(struct llog_handle *loghandle);
521 int llog_declare_create(const struct lu_env *env,
522 struct llog_handle *loghandle, struct thandle *th);
523 int llog_create(const struct lu_env *env, struct llog_handle *handle,
525 int llog_trans_destroy(const struct lu_env *env, struct llog_handle *handle,
527 int llog_destroy(const struct lu_env *env, struct llog_handle *handle);
529 int llog_declare_write_rec(const struct lu_env *env,
530 struct llog_handle *handle,
531 struct llog_rec_hdr *rec, int idx,
533 int llog_write_rec(const struct lu_env *env, struct llog_handle *handle,
534 struct llog_rec_hdr *rec, struct llog_cookie *logcookies,
535 int idx, struct thandle *th);
536 int llog_add(const struct lu_env *env, struct llog_handle *lgh,
537 struct llog_rec_hdr *rec, struct llog_cookie *logcookies,
539 int llog_declare_add(const struct lu_env *env, struct llog_handle *lgh,
540 struct llog_rec_hdr *rec, struct thandle *th);
541 int lustre_process_log(struct super_block *sb, char *logname,
542 struct config_llog_instance *cfg);
543 int lustre_end_log(struct super_block *sb, char *logname,
544 struct config_llog_instance *cfg);
545 int llog_open_create(const struct lu_env *env, struct llog_ctxt *ctxt,
546 struct llog_handle **res, struct llog_logid *logid,
548 int llog_erase(const struct lu_env *env, struct llog_ctxt *ctxt,
549 struct llog_logid *logid, char *name);
550 int llog_write(const struct lu_env *env, struct llog_handle *loghandle,
551 struct llog_rec_hdr *rec, int idx);