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) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
31 * This file is part of Lustre, http://www.lustre.org/
32 * Lustre is a trademark of Sun Microsystems, Inc.
34 * lustre/obdclass/llog_lvfs.c
36 * OST<->MDS recovery logging infrastructure.
37 * Invariants in implementation:
38 * - we do not share logs among different OST<->MDS connections, so that
39 * if an OST or MDS fails it need only look at log(s) relevant to itself
41 * Author: Andreas Dilger <adilger@clusterfs.com>
44 #define DEBUG_SUBSYSTEM S_LOG
47 #include <liblustre.h>
51 #include <obd_class.h>
52 #include <lustre_log.h>
54 #include <libcfs/list.h>
56 #include <lustre_fsfilt.h>
57 #include <lustre_disk.h>
58 #include "llog_internal.h"
60 #if defined(__KERNEL__) && defined(LLOG_LVFS)
62 static int llog_lvfs_pad(struct obd_device *obd, struct l_file *file,
65 struct llog_rec_hdr rec = { 0 };
66 struct llog_rec_tail tail;
70 LASSERT(len >= LLOG_MIN_REC_SIZE && (len & 0x7) == 0);
72 tail.lrt_len = rec.lrh_len = len;
73 tail.lrt_index = rec.lrh_index = index;
74 rec.lrh_type = LLOG_PAD_MAGIC;
76 rc = fsfilt_write_record(obd, file, &rec, sizeof(rec), &file->f_pos, 0);
78 CERROR("error writing padding record: rc %d\n", rc);
82 file->f_pos += len - sizeof(rec) - sizeof(tail);
83 rc = fsfilt_write_record(obd, file, &tail, sizeof(tail),&file->f_pos,0);
85 CERROR("error writing padding record: rc %d\n", rc);
93 static int llog_lvfs_write_blob(struct obd_device *obd, struct l_file *file,
94 struct llog_rec_hdr *rec, void *buf, loff_t off)
97 struct llog_rec_tail end;
98 loff_t saved_off = file->f_pos;
99 int buflen = rec->lrh_len;
106 CWARN("0-length record\n");
109 rc = fsfilt_write_record(obd, file, rec, buflen,&file->f_pos,0);
111 CERROR("error writing log record: rc %d\n", rc);
118 rec->lrh_len = sizeof(*rec) + buflen + sizeof(end);
119 rc = fsfilt_write_record(obd, file, rec, sizeof(*rec), &file->f_pos, 0);
121 CERROR("error writing log hdr: rc %d\n", rc);
125 rc = fsfilt_write_record(obd, file, buf, buflen, &file->f_pos, 0);
127 CERROR("error writing log buffer: rc %d\n", rc);
131 end.lrt_len = rec->lrh_len;
132 end.lrt_index = rec->lrh_index;
133 rc = fsfilt_write_record(obd, file, &end, sizeof(end), &file->f_pos, 0);
135 CERROR("error writing log tail: rc %d\n", rc);
141 if (saved_off > file->f_pos)
142 file->f_pos = saved_off;
147 static int llog_lvfs_read_blob(struct obd_device *obd, struct l_file *file,
148 void *buf, int size, loff_t off)
154 rc = fsfilt_read_record(obd, file, buf, size, &offset);
156 CERROR("error reading log record: rc %d\n", rc);
162 static int llog_lvfs_read_header(struct llog_handle *handle)
164 struct obd_device *obd;
168 LASSERT(sizeof(*handle->lgh_hdr) == LLOG_CHUNK_SIZE);
170 obd = handle->lgh_ctxt->loc_exp->exp_obd;
172 if (i_size_read(handle->lgh_file->f_dentry->d_inode) == 0) {
173 CDEBUG(D_HA, "not reading header from 0-byte log\n");
177 rc = llog_lvfs_read_blob(obd, handle->lgh_file, handle->lgh_hdr,
180 CERROR("error reading log header from %.*s\n",
181 handle->lgh_file->f_dentry->d_name.len,
182 handle->lgh_file->f_dentry->d_name.name);
184 struct llog_rec_hdr *llh_hdr = &handle->lgh_hdr->llh_hdr;
186 if (LLOG_REC_HDR_NEEDS_SWABBING(llh_hdr))
187 lustre_swab_llog_hdr(handle->lgh_hdr);
189 if (llh_hdr->lrh_type != LLOG_HDR_MAGIC) {
190 CERROR("bad log %.*s header magic: %#x (expected %#x)\n",
191 handle->lgh_file->f_dentry->d_name.len,
192 handle->lgh_file->f_dentry->d_name.name,
193 llh_hdr->lrh_type, LLOG_HDR_MAGIC);
195 } else if (llh_hdr->lrh_len != LLOG_CHUNK_SIZE) {
196 CERROR("incorrectly sized log %.*s header: %#x "
198 handle->lgh_file->f_dentry->d_name.len,
199 handle->lgh_file->f_dentry->d_name.name,
200 llh_hdr->lrh_len, LLOG_CHUNK_SIZE);
201 CERROR("you may need to re-run lconf --write_conf.\n");
206 handle->lgh_last_idx = handle->lgh_hdr->llh_tail.lrt_index;
207 handle->lgh_file->f_pos = i_size_read(handle->lgh_file->f_dentry->d_inode);
212 /* returns negative in on error; 0 if success && reccookie == 0; 1 otherwise */
213 /* appends if idx == -1, otherwise overwrites record idx. */
214 static int llog_lvfs_write_rec(struct llog_handle *loghandle,
215 struct llog_rec_hdr *rec,
216 struct llog_cookie *reccookie, int cookiecount,
219 struct llog_log_hdr *llh;
220 int reclen = rec->lrh_len, index, rc;
221 struct llog_rec_tail *lrt;
222 struct obd_device *obd;
227 llh = loghandle->lgh_hdr;
228 file = loghandle->lgh_file;
229 obd = loghandle->lgh_ctxt->loc_exp->exp_obd;
231 /* record length should not bigger than LLOG_CHUNK_SIZE */
233 rc = (reclen > LLOG_CHUNK_SIZE - sizeof(struct llog_rec_hdr) -
234 sizeof(struct llog_rec_tail)) ? -E2BIG : 0;
236 rc = (reclen > LLOG_CHUNK_SIZE) ? -E2BIG : 0;
241 /* write_blob adds header and tail to lrh_len. */
242 reclen = sizeof(*rec) + rec->lrh_len +
243 sizeof(struct llog_rec_tail);
248 /* no header: only allowed to insert record 1 */
249 if (idx != 1 && !i_size_read(file->f_dentry->d_inode)) {
250 CERROR("idx != -1 in empty log\n");
254 if (idx && llh->llh_size && llh->llh_size != rec->lrh_len)
257 if (!ext2_test_bit(idx, llh->llh_bitmap))
258 CERROR("Modify unset record %u\n", idx);
259 if (idx != rec->lrh_index)
260 CERROR("Index mismatch %d %u\n", idx, rec->lrh_index);
262 rc = llog_lvfs_write_blob(obd, file, &llh->llh_hdr, NULL, 0);
263 /* we are done if we only write the header or on error */
267 /* Assumes constant lrh_len */
268 saved_offset = sizeof(*llh) + (idx - 1) * reclen;
271 struct llog_rec_hdr check;
273 /* We assume that caller has set lgh_cur_* */
274 saved_offset = loghandle->lgh_cur_offset;
276 "modify record "LPX64": idx:%d/%u/%d, len:%u "
278 loghandle->lgh_id.lgl_oid, idx, rec->lrh_index,
279 loghandle->lgh_cur_idx, rec->lrh_len,
280 (long long)(saved_offset - sizeof(*llh)));
281 if (rec->lrh_index != loghandle->lgh_cur_idx) {
282 CERROR("modify idx mismatch %u/%d\n",
283 idx, loghandle->lgh_cur_idx);
286 #if 1 /* FIXME remove this safety check at some point */
287 /* Verify that the record we're modifying is the
289 rc = llog_lvfs_read_blob(obd, file, &check,
290 sizeof(check), saved_offset);
291 if (check.lrh_index != idx || check.lrh_len != reclen) {
292 CERROR("Bad modify idx %u/%u size %u/%u (%d)\n",
293 idx, check.lrh_index, reclen,
300 rc = llog_lvfs_write_blob(obd, file, rec, buf, saved_offset);
301 if (rc == 0 && reccookie) {
302 reccookie->lgc_lgl = loghandle->lgh_id;
303 reccookie->lgc_index = idx;
309 /* Make sure that records don't cross a chunk boundary, so we can
310 * process them page-at-a-time if needed. If it will cross a chunk
311 * boundary, write in a fake (but referenced) entry to pad the chunk.
313 * We know that llog_current_log() will return a loghandle that is
314 * big enough to hold reclen, so all we care about is padding here.
316 left = LLOG_CHUNK_SIZE - (file->f_pos & (LLOG_CHUNK_SIZE - 1));
318 /* NOTE: padding is a record, but no bit is set */
319 if (left != 0 && left != reclen &&
320 left < (reclen + LLOG_MIN_REC_SIZE)) {
321 index = loghandle->lgh_last_idx + 1;
322 rc = llog_lvfs_pad(obd, file, left, index);
325 loghandle->lgh_last_idx++; /*for pad rec*/
327 /* if it's the last idx in log file, then return -ENOSPC */
328 if (loghandle->lgh_last_idx >= LLOG_BITMAP_SIZE(llh) - 1)
330 loghandle->lgh_last_idx++;
331 index = loghandle->lgh_last_idx;
332 LASSERT(index < LLOG_BITMAP_SIZE(llh));
333 rec->lrh_index = index;
335 lrt = (struct llog_rec_tail *)
336 ((char *)rec + rec->lrh_len - sizeof(*lrt));
337 lrt->lrt_len = rec->lrh_len;
338 lrt->lrt_index = rec->lrh_index;
340 /*The caller should make sure only 1 process access the lgh_last_idx,
341 *Otherwise it might hit the assert.*/
342 LASSERT(index < LLOG_BITMAP_SIZE(llh));
343 if (ext2_set_bit(index, llh->llh_bitmap)) {
344 CERROR("argh, index %u already set in log bitmap?\n", index);
345 LBUG(); /* should never happen */
348 llh->llh_tail.lrt_index = index;
350 rc = llog_lvfs_write_blob(obd, file, &llh->llh_hdr, NULL, 0);
354 rc = llog_lvfs_write_blob(obd, file, rec, buf, file->f_pos);
358 CDEBUG(D_RPCTRACE, "added record "LPX64": idx: %u, %u \n",
359 loghandle->lgh_id.lgl_oid, index, rec->lrh_len);
360 if (rc == 0 && reccookie) {
361 reccookie->lgc_lgl = loghandle->lgh_id;
362 reccookie->lgc_index = index;
363 if ((rec->lrh_type == MDS_UNLINK_REC) ||
364 (rec->lrh_type == MDS_SETATTR64_REC))
365 reccookie->lgc_subsys = LLOG_MDS_OST_ORIG_CTXT;
366 else if (rec->lrh_type == OST_SZ_REC)
367 reccookie->lgc_subsys = LLOG_SIZE_ORIG_CTXT;
369 reccookie->lgc_subsys = -1;
372 if (rc == 0 && rec->lrh_type == LLOG_GEN_REC)
378 /* We can skip reading at least as many log blocks as the number of
379 * minimum sized log records we are skipping. If it turns out
380 * that we are not far enough along the log (because the
381 * actual records are larger than minimum size) we just skip
382 * some more records. */
384 static void llog_skip_over(__u64 *off, int curr, int goal)
388 *off = (*off + (goal-curr-1) * LLOG_MIN_REC_SIZE) &
389 ~(LLOG_CHUNK_SIZE - 1);
394 * - cur_offset to the furthest point read in the log file
395 * - cur_idx to the log index preceeding cur_offset
396 * returns -EIO/-EINVAL on error
398 static int llog_lvfs_next_block(struct llog_handle *loghandle, int *cur_idx,
399 int next_idx, __u64 *cur_offset, void *buf,
405 if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
408 CDEBUG(D_OTHER, "looking for log index %u (cur idx %u off "LPU64")\n",
409 next_idx, *cur_idx, *cur_offset);
411 while (*cur_offset < i_size_read(loghandle->lgh_file->f_dentry->d_inode)) {
412 struct llog_rec_hdr *rec;
413 struct llog_rec_tail *tail;
416 llog_skip_over(cur_offset, *cur_idx, next_idx);
419 rc = fsfilt_read_record(loghandle->lgh_ctxt->loc_exp->exp_obd,
420 loghandle->lgh_file, buf, len,
423 CERROR("Cant read llog block at log id "LPU64
424 "/%u offset "LPU64"\n",
425 loghandle->lgh_id.lgl_oid,
426 loghandle->lgh_id.lgl_ogen,
431 /* put number of bytes read into rc to make code simpler */
432 rc = ppos - *cur_offset;
436 /* signal the end of the valid buffer to llog_process */
437 memset(buf + rc, 0, len - rc);
440 if (rc == 0) /* end of file, nothing to do */
443 if (rc < sizeof(*tail)) {
444 CERROR("Invalid llog block at log id "LPU64"/%u offset "
445 LPU64"\n", loghandle->lgh_id.lgl_oid,
446 loghandle->lgh_id.lgl_ogen, *cur_offset);
451 tail = (struct llog_rec_tail *)((char *)buf + rc -
452 sizeof(struct llog_rec_tail));
454 if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
455 lustre_swab_llog_rec(rec);
457 *cur_idx = tail->lrt_index;
459 /* this shouldn't happen */
460 if (tail->lrt_index == 0) {
461 CERROR("Invalid llog tail at log id "LPU64"/%u offset "
462 LPU64"\n", loghandle->lgh_id.lgl_oid,
463 loghandle->lgh_id.lgl_ogen, *cur_offset);
466 if (tail->lrt_index < next_idx)
469 /* sanity check that the start of the new buffer is no farther
470 * than the record that we wanted. This shouldn't happen. */
471 if (rec->lrh_index > next_idx) {
472 CERROR("missed desired record? %u > %u\n",
473 rec->lrh_index, next_idx);
481 static int llog_lvfs_prev_block(struct llog_handle *loghandle,
482 int prev_idx, void *buf, int len)
488 if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
491 CDEBUG(D_OTHER, "looking for log index %u\n", prev_idx);
493 cur_offset = LLOG_CHUNK_SIZE;
494 llog_skip_over(&cur_offset, 0, prev_idx);
496 while (cur_offset < i_size_read(loghandle->lgh_file->f_dentry->d_inode)) {
497 struct llog_rec_hdr *rec;
498 struct llog_rec_tail *tail;
503 rc = fsfilt_read_record(loghandle->lgh_ctxt->loc_exp->exp_obd,
504 loghandle->lgh_file, buf, len,
507 CERROR("Cant read llog block at log id "LPU64
508 "/%u offset "LPU64"\n",
509 loghandle->lgh_id.lgl_oid,
510 loghandle->lgh_id.lgl_ogen,
515 /* put number of bytes read into rc to make code simpler */
516 rc = ppos - cur_offset;
519 if (rc == 0) /* end of file, nothing to do */
522 if (rc < sizeof(*tail)) {
523 CERROR("Invalid llog block at log id "LPU64"/%u offset "
524 LPU64"\n", loghandle->lgh_id.lgl_oid,
525 loghandle->lgh_id.lgl_ogen, cur_offset);
529 tail = buf + rc - sizeof(struct llog_rec_tail);
531 /* this shouldn't happen */
532 if (tail->lrt_index == 0) {
533 CERROR("Invalid llog tail at log id "LPU64"/%u offset "
534 LPU64"\n", loghandle->lgh_id.lgl_oid,
535 loghandle->lgh_id.lgl_ogen, cur_offset);
538 if (le32_to_cpu(tail->lrt_index) < prev_idx)
541 /* sanity check that the start of the new buffer is no farther
542 * than the record that we wanted. This shouldn't happen. */
544 if (le32_to_cpu(rec->lrh_index) > prev_idx) {
545 CERROR("missed desired record? %u > %u\n",
546 le32_to_cpu(rec->lrh_index), prev_idx);
554 static struct file *llog_filp_open(char *dir, char *name, int flags, int mode)
560 OBD_ALLOC(logname, PATH_MAX);
562 return ERR_PTR(-ENOMEM);
564 len = snprintf(logname, PATH_MAX, "%s/%s", dir, name);
565 if (len >= PATH_MAX - 1) {
566 filp = ERR_PTR(-ENAMETOOLONG);
568 filp = l_filp_open(logname, flags, mode);
570 CERROR("logfile creation %s: %ld\n", logname,
573 OBD_FREE(logname, PATH_MAX);
577 /* This is a callback from the llog_* functions.
578 * Assumes caller has already pushed us into the kernel context. */
579 static int llog_lvfs_create(struct llog_ctxt *ctxt, struct llog_handle **res,
580 struct llog_logid *logid, char *name)
582 struct llog_handle *handle;
583 struct obd_device *obd;
584 struct l_dentry *dchild = NULL;
585 struct obdo *oa = NULL;
587 int open_flags = O_RDWR | O_CREAT | O_LARGEFILE;
590 handle = llog_alloc_handle();
596 LASSERT(ctxt->loc_exp);
597 obd = ctxt->loc_exp->exp_obd;
600 dchild = obd_lvfs_fid2dentry(ctxt->loc_exp, logid->lgl_oid,
601 logid->lgl_ogen, logid->lgl_oseq);
603 if (IS_ERR(dchild)) {
604 rc = PTR_ERR(dchild);
605 CERROR("error looking up logfile "LPX64":0x%x: rc %d\n",
606 logid->lgl_oid, logid->lgl_ogen, rc);
610 if (dchild->d_inode == NULL) {
613 CERROR("nonexistent log file "LPX64":"LPX64": rc %d\n",
614 logid->lgl_oid, logid->lgl_oseq, rc);
618 /* l_dentry_open will call dput(dchild) if there is an error */
619 handle->lgh_file = l_dentry_open(&obd->obd_lvfs_ctxt, dchild,
620 O_RDWR | O_LARGEFILE);
621 if (IS_ERR(handle->lgh_file)) {
622 rc = PTR_ERR(handle->lgh_file);
623 CERROR("error opening logfile "LPX64"0x%x: rc %d\n",
624 logid->lgl_oid, logid->lgl_ogen, rc);
628 /* assign the value of lgh_id for handle directly */
629 handle->lgh_id = *logid;
632 handle->lgh_file = llog_filp_open(MOUNT_CONFIGS_DIR,
633 name, open_flags, 0644);
634 if (IS_ERR(handle->lgh_file))
635 GOTO(out, rc = PTR_ERR(handle->lgh_file));
637 handle->lgh_id.lgl_oseq = 1;
638 handle->lgh_id.lgl_oid =
639 handle->lgh_file->f_dentry->d_inode->i_ino;
640 handle->lgh_id.lgl_ogen =
641 handle->lgh_file->f_dentry->d_inode->i_generation;
645 GOTO(out, rc = -ENOMEM);
647 oa->o_seq = FID_SEQ_LLOG;
648 oa->o_valid = OBD_MD_FLGENER | OBD_MD_FLGROUP;
650 rc = obd_create(NULL, ctxt->loc_exp, oa, NULL, NULL);
654 /* FIXME: rationalize the misuse of o_generation in
655 * this API along with mds_obd_{create,destroy}.
656 * Hopefully it is only an internal API issue. */
657 #define o_generation o_parent_oid
658 dchild = obd_lvfs_fid2dentry(ctxt->loc_exp, oa->o_id,
659 oa->o_generation, oa->o_seq);
662 GOTO(out, rc = PTR_ERR(dchild));
664 handle->lgh_file = l_dentry_open(&obd->obd_lvfs_ctxt, dchild,
666 if (IS_ERR(handle->lgh_file))
667 GOTO(out, rc = PTR_ERR(handle->lgh_file));
669 handle->lgh_id.lgl_oseq = oa->o_seq;
670 handle->lgh_id.lgl_oid = oa->o_id;
671 handle->lgh_id.lgl_ogen = oa->o_generation;
674 handle->lgh_ctxt = ctxt;
677 llog_free_handle(handle);
684 static int llog_lvfs_close(struct llog_handle *handle)
689 rc = filp_close(handle->lgh_file, 0);
691 CERROR("error closing log: rc %d\n", rc);
695 static int llog_lvfs_destroy(struct llog_handle *handle)
697 struct dentry *fdentry;
699 struct obd_device *obd = handle->lgh_ctxt->loc_exp->exp_obd;
706 dir = MOUNT_CONFIGS_DIR;
708 fdentry = handle->lgh_file->f_dentry;
709 inode = fdentry->d_parent->d_inode;
710 if (strcmp(fdentry->d_parent->d_name.name, dir) == 0) {
711 struct lvfs_run_ctxt saved;
712 struct vfsmount *mnt = mntget(handle->lgh_file->f_vfsmnt);
714 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
716 rc = llog_lvfs_close(handle);
719 mutex_lock_nested(&inode->i_mutex, I_MUTEX_PARENT);
720 rc = ll_vfs_unlink(inode, fdentry, mnt);
721 mutex_unlock(&inode->i_mutex);
726 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
734 oa->o_id = handle->lgh_id.lgl_oid;
735 oa->o_seq = handle->lgh_id.lgl_oseq;
736 oa->o_generation = handle->lgh_id.lgl_ogen;
738 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP | OBD_MD_FLGENER;
740 rc = llog_lvfs_close(handle);
744 th = fsfilt_start_log(obd, inode, FSFILT_OP_UNLINK, NULL, 1);
746 CERROR("fsfilt_start failed: %ld\n", PTR_ERR(th));
747 GOTO(out, rc = PTR_ERR(th));
750 rc = obd_destroy(NULL, handle->lgh_ctxt->loc_exp, oa,
751 NULL, NULL, NULL, NULL);
753 rc1 = fsfilt_commit(obd, inode, th, 0);
754 if (rc == 0 && rc1 != 0)
761 /* reads the catalog list */
762 int llog_get_cat_list(struct obd_device *disk_obd,
763 char *name, int idx, int count, struct llog_catid *idarray)
765 struct lvfs_run_ctxt saved;
768 int size = sizeof(*idarray) * count;
769 loff_t off = idx * sizeof(*idarray);
775 push_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
776 file = filp_open(name, O_RDWR | O_CREAT | O_LARGEFILE, 0700);
777 if (!file || IS_ERR(file)) {
779 CERROR("OBD filter: cannot open/create %s: rc = %d\n",
784 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
785 CERROR("%s is not a regular file!: mode = %o\n", name,
786 file->f_dentry->d_inode->i_mode);
787 GOTO(out, rc = -ENOENT);
790 CDEBUG(D_CONFIG, "cat list: disk size=%d, read=%d\n",
791 (int)i_size_read(file->f_dentry->d_inode), size);
793 /* read for new ost index or for empty file */
794 memset(idarray, 0, size);
795 if (i_size_read(file->f_dentry->d_inode) < off)
798 rc = fsfilt_read_record(disk_obd, file, idarray, size, &off);
800 CERROR("OBD filter: error reading %s: rc %d\n", name, rc);
806 pop_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
807 if (file && !IS_ERR(file))
808 rc1 = filp_close(file, 0);
813 EXPORT_SYMBOL(llog_get_cat_list);
815 /* writes the cat list */
816 int llog_put_cat_list(struct obd_device *disk_obd,
817 char *name, int idx, int count, struct llog_catid *idarray)
819 struct lvfs_run_ctxt saved;
822 int size = sizeof(*idarray) * count;
823 loff_t off = idx * sizeof(*idarray);
828 push_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
829 file = filp_open(name, O_RDWR | O_CREAT | O_LARGEFILE, 0700);
830 if (!file || IS_ERR(file)) {
832 CERROR("OBD filter: cannot open/create %s: rc = %d\n",
837 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
838 CERROR("%s is not a regular file!: mode = %o\n", name,
839 file->f_dentry->d_inode->i_mode);
840 GOTO(out, rc = -ENOENT);
843 rc = fsfilt_write_record(disk_obd, file, idarray, size, &off, 1);
845 CDEBUG(D_INODE,"OBD filter: error writeing %s: rc %d\n",
851 pop_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
852 if (file && !IS_ERR(file))
853 rc1 = filp_close(file, 0);
860 EXPORT_SYMBOL(llog_put_cat_list);
862 struct llog_operations llog_lvfs_ops = {
863 lop_write_rec: llog_lvfs_write_rec,
864 lop_next_block: llog_lvfs_next_block,
865 lop_prev_block: llog_lvfs_prev_block,
866 lop_read_header: llog_lvfs_read_header,
867 lop_create: llog_lvfs_create,
868 lop_destroy: llog_lvfs_destroy,
869 lop_close: llog_lvfs_close,
870 // lop_cancel: llog_lvfs_cancel,
873 EXPORT_SYMBOL(llog_lvfs_ops);
875 #else /* !__KERNEL__ */
877 static int llog_lvfs_read_header(struct llog_handle *handle)
883 static int llog_lvfs_write_rec(struct llog_handle *loghandle,
884 struct llog_rec_hdr *rec,
885 struct llog_cookie *reccookie, int cookiecount,
892 static int llog_lvfs_next_block(struct llog_handle *loghandle, int *cur_idx,
893 int next_idx, __u64 *cur_offset, void *buf,
900 static int llog_lvfs_prev_block(struct llog_handle *loghandle,
901 int prev_idx, void *buf, int len)
907 static int llog_lvfs_create(struct llog_ctxt *ctxt, struct llog_handle **res,
908 struct llog_logid *logid, char *name)
914 static int llog_lvfs_close(struct llog_handle *handle)
920 static int llog_lvfs_destroy(struct llog_handle *handle)
926 int llog_get_cat_list(struct obd_device *disk_obd,
927 char *name, int idx, int count, struct llog_catid *idarray)
933 int llog_put_cat_list(struct obd_device *disk_obd,
934 char *name, int idx, int count, struct llog_catid *idarray)
940 struct llog_operations llog_lvfs_ops = {
941 lop_write_rec: llog_lvfs_write_rec,
942 lop_next_block: llog_lvfs_next_block,
943 lop_prev_block: llog_lvfs_prev_block,
944 lop_read_header: llog_lvfs_read_header,
945 lop_create: llog_lvfs_create,
946 lop_destroy: llog_lvfs_destroy,
947 lop_close: llog_lvfs_close,
948 // lop_cancel: llog_lvfs_cancel,