1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/obdclass/llog_lvfs.c
38 * OST<->MDS recovery logging infrastructure.
39 * Invariants in implementation:
40 * - we do not share logs among different OST<->MDS connections, so that
41 * if an OST or MDS fails it need only look at log(s) relevant to itself
43 * Author: Andreas Dilger <adilger@clusterfs.com>
46 #define DEBUG_SUBSYSTEM S_LOG
53 #include <liblustre.h>
57 #include <obd_class.h>
58 #include <lustre_log.h>
60 #include <libcfs/list.h>
62 #include <lustre_fsfilt.h>
63 #include <lustre_disk.h>
64 #include "llog_internal.h"
66 #if defined(__KERNEL__) && defined(LLOG_LVFS)
68 static int llog_lvfs_pad(struct obd_device *obd, struct l_file *file,
71 struct llog_rec_hdr rec = { 0 };
72 struct llog_rec_tail tail;
76 LASSERT(len >= LLOG_MIN_REC_SIZE && (len & 0x7) == 0);
78 tail.lrt_len = rec.lrh_len = len;
79 tail.lrt_index = rec.lrh_index = index;
80 rec.lrh_type = LLOG_PAD_MAGIC;
82 rc = fsfilt_write_record(obd, file, &rec, sizeof(rec), &file->f_pos, 0);
84 CERROR("error writing padding record: rc %d\n", rc);
88 file->f_pos += len - sizeof(rec) - sizeof(tail);
89 rc = fsfilt_write_record(obd, file, &tail, sizeof(tail),&file->f_pos,0);
91 CERROR("error writing padding record: rc %d\n", rc);
99 static int llog_lvfs_write_blob(struct obd_device *obd, struct l_file *file,
100 struct llog_rec_hdr *rec, void *buf, loff_t off)
103 struct llog_rec_tail end;
104 loff_t saved_off = file->f_pos;
105 int buflen = rec->lrh_len;
112 CWARN("0-length record\n");
115 rc = fsfilt_write_record(obd, file, rec, buflen,&file->f_pos,0);
117 CERROR("error writing log record: rc %d\n", rc);
124 rec->lrh_len = sizeof(*rec) + buflen + sizeof(end);
125 rc = fsfilt_write_record(obd, file, rec, sizeof(*rec), &file->f_pos, 0);
127 CERROR("error writing log hdr: rc %d\n", rc);
131 rc = fsfilt_write_record(obd, file, buf, buflen, &file->f_pos, 0);
133 CERROR("error writing log buffer: rc %d\n", rc);
137 end.lrt_len = rec->lrh_len;
138 end.lrt_index = rec->lrh_index;
139 rc = fsfilt_write_record(obd, file, &end, sizeof(end), &file->f_pos, 0);
141 CERROR("error writing log tail: rc %d\n", rc);
147 if (saved_off > file->f_pos)
148 file->f_pos = saved_off;
153 static int llog_lvfs_read_blob(struct obd_device *obd, struct l_file *file,
154 void *buf, int size, loff_t off)
160 rc = fsfilt_read_record(obd, file, buf, size, &offset);
162 CERROR("error reading log record: rc %d\n", rc);
168 static int llog_lvfs_read_header(struct llog_handle *handle)
170 struct obd_device *obd;
174 LASSERT(sizeof(*handle->lgh_hdr) == LLOG_CHUNK_SIZE);
176 obd = handle->lgh_ctxt->loc_exp->exp_obd;
178 if (i_size_read(handle->lgh_file->f_dentry->d_inode) == 0) {
179 CDEBUG(D_HA, "not reading header from 0-byte log\n");
183 rc = llog_lvfs_read_blob(obd, handle->lgh_file, handle->lgh_hdr,
186 CERROR("error reading log header from %.*s\n",
187 handle->lgh_file->f_dentry->d_name.len,
188 handle->lgh_file->f_dentry->d_name.name);
190 struct llog_rec_hdr *llh_hdr = &handle->lgh_hdr->llh_hdr;
192 if (LLOG_REC_HDR_NEEDS_SWABBING(llh_hdr))
193 lustre_swab_llog_hdr(handle->lgh_hdr);
195 if (llh_hdr->lrh_type != LLOG_HDR_MAGIC) {
196 CERROR("bad log %.*s header magic: %#x (expected %#x)\n",
197 handle->lgh_file->f_dentry->d_name.len,
198 handle->lgh_file->f_dentry->d_name.name,
199 llh_hdr->lrh_type, LLOG_HDR_MAGIC);
201 } else if (llh_hdr->lrh_len != LLOG_CHUNK_SIZE) {
202 CERROR("incorrectly sized log %.*s header: %#x "
204 handle->lgh_file->f_dentry->d_name.len,
205 handle->lgh_file->f_dentry->d_name.name,
206 llh_hdr->lrh_len, LLOG_CHUNK_SIZE);
207 CERROR("you may need to re-run lconf --write_conf.\n");
212 handle->lgh_last_idx = handle->lgh_hdr->llh_tail.lrt_index;
213 handle->lgh_file->f_pos = i_size_read(handle->lgh_file->f_dentry->d_inode);
218 /* returns negative in on error; 0 if success && reccookie == 0; 1 otherwise */
219 /* appends if idx == -1, otherwise overwrites record idx. */
220 static int llog_lvfs_write_rec(struct llog_handle *loghandle,
221 struct llog_rec_hdr *rec,
222 struct llog_cookie *reccookie, int cookiecount,
225 struct llog_log_hdr *llh;
226 int reclen = rec->lrh_len, index, rc;
227 struct llog_rec_tail *lrt;
228 struct obd_device *obd;
233 llh = loghandle->lgh_hdr;
234 file = loghandle->lgh_file;
235 obd = loghandle->lgh_ctxt->loc_exp->exp_obd;
237 /* record length should not bigger than LLOG_CHUNK_SIZE */
239 rc = (reclen > LLOG_CHUNK_SIZE - sizeof(struct llog_rec_hdr) -
240 sizeof(struct llog_rec_tail)) ? -E2BIG : 0;
242 rc = (reclen > LLOG_CHUNK_SIZE) ? -E2BIG : 0;
247 /* write_blob adds header and tail to lrh_len. */
248 reclen = sizeof(*rec) + rec->lrh_len +
249 sizeof(struct llog_rec_tail);
254 /* no header: only allowed to insert record 1 */
255 if (idx != 1 && !i_size_read(file->f_dentry->d_inode)) {
256 CERROR("idx != -1 in empty log\n");
260 if (idx && llh->llh_size && llh->llh_size != rec->lrh_len)
263 if (!ext2_test_bit(idx, llh->llh_bitmap))
264 CERROR("Modify unset record %u\n", idx);
265 if (idx != rec->lrh_index)
266 CERROR("Index mismatch %d %u\n", idx, rec->lrh_index);
268 rc = llog_lvfs_write_blob(obd, file, &llh->llh_hdr, NULL, 0);
269 /* we are done if we only write the header or on error */
273 /* Assumes constant lrh_len */
274 saved_offset = sizeof(*llh) + (idx - 1) * reclen;
277 struct llog_rec_hdr check;
279 /* We assume that caller has set lgh_cur_* */
280 saved_offset = loghandle->lgh_cur_offset;
282 "modify record "LPX64": idx:%d/%u/%d, len:%u "
284 loghandle->lgh_id.lgl_oid, idx, rec->lrh_index,
285 loghandle->lgh_cur_idx, rec->lrh_len,
286 (long long)(saved_offset - sizeof(*llh)));
287 if (rec->lrh_index != loghandle->lgh_cur_idx) {
288 CERROR("modify idx mismatch %u/%d\n",
289 idx, loghandle->lgh_cur_idx);
292 #if 1 /* FIXME remove this safety check at some point */
293 /* Verify that the record we're modifying is the
295 rc = llog_lvfs_read_blob(obd, file, &check,
296 sizeof(check), saved_offset);
297 if (check.lrh_index != idx || check.lrh_len != reclen) {
298 CERROR("Bad modify idx %u/%u size %u/%u (%d)\n",
299 idx, check.lrh_index, reclen,
306 rc = llog_lvfs_write_blob(obd, file, rec, buf, saved_offset);
307 if (rc == 0 && reccookie) {
308 reccookie->lgc_lgl = loghandle->lgh_id;
309 reccookie->lgc_index = idx;
315 /* Make sure that records don't cross a chunk boundary, so we can
316 * process them page-at-a-time if needed. If it will cross a chunk
317 * boundary, write in a fake (but referenced) entry to pad the chunk.
319 * We know that llog_current_log() will return a loghandle that is
320 * big enough to hold reclen, so all we care about is padding here.
322 left = LLOG_CHUNK_SIZE - (file->f_pos & (LLOG_CHUNK_SIZE - 1));
324 /* NOTE: padding is a record, but no bit is set */
325 if (left != 0 && left != reclen &&
326 left < (reclen + LLOG_MIN_REC_SIZE)) {
327 index = loghandle->lgh_last_idx + 1;
328 rc = llog_lvfs_pad(obd, file, left, index);
331 loghandle->lgh_last_idx++; /*for pad rec*/
333 /* if it's the last idx in log file, then return -ENOSPC */
334 if (loghandle->lgh_last_idx >= LLOG_BITMAP_SIZE(llh) - 1)
336 loghandle->lgh_last_idx++;
337 index = loghandle->lgh_last_idx;
338 LASSERT(index < LLOG_BITMAP_SIZE(llh));
339 rec->lrh_index = index;
341 lrt = (struct llog_rec_tail *)
342 ((char *)rec + rec->lrh_len - sizeof(*lrt));
343 lrt->lrt_len = rec->lrh_len;
344 lrt->lrt_index = rec->lrh_index;
346 /*The caller should make sure only 1 process access the lgh_last_idx,
347 *Otherwise it might hit the assert.*/
348 LASSERT(index < LLOG_BITMAP_SIZE(llh));
349 if (ext2_set_bit(index, llh->llh_bitmap)) {
350 CERROR("argh, index %u already set in log bitmap?\n", index);
351 LBUG(); /* should never happen */
354 llh->llh_tail.lrt_index = index;
356 rc = llog_lvfs_write_blob(obd, file, &llh->llh_hdr, NULL, 0);
360 rc = llog_lvfs_write_blob(obd, file, rec, buf, file->f_pos);
364 CDEBUG(D_RPCTRACE, "added record "LPX64": idx: %u, %u \n",
365 loghandle->lgh_id.lgl_oid, index, rec->lrh_len);
366 if (rc == 0 && reccookie) {
367 reccookie->lgc_lgl = loghandle->lgh_id;
368 reccookie->lgc_index = index;
369 if ((rec->lrh_type == MDS_UNLINK_REC) ||
370 (rec->lrh_type == MDS_SETATTR_REC))
371 reccookie->lgc_subsys = LLOG_MDS_OST_ORIG_CTXT;
372 else if (rec->lrh_type == OST_SZ_REC)
373 reccookie->lgc_subsys = LLOG_SIZE_ORIG_CTXT;
374 else if (rec->lrh_type == OST_RAID1_REC)
375 reccookie->lgc_subsys = LLOG_RD1_ORIG_CTXT;
377 reccookie->lgc_subsys = -1;
380 if (rc == 0 && rec->lrh_type == LLOG_GEN_REC)
386 /* We can skip reading at least as many log blocks as the number of
387 * minimum sized log records we are skipping. If it turns out
388 * that we are not far enough along the log (because the
389 * actual records are larger than minimum size) we just skip
390 * some more records. */
392 static void llog_skip_over(__u64 *off, int curr, int goal)
396 *off = (*off + (goal-curr-1) * LLOG_MIN_REC_SIZE) &
397 ~(LLOG_CHUNK_SIZE - 1);
402 * - cur_offset to the furthest point read in the log file
403 * - cur_idx to the log index preceeding cur_offset
404 * returns -EIO/-EINVAL on error
406 static int llog_lvfs_next_block(struct llog_handle *loghandle, int *cur_idx,
407 int next_idx, __u64 *cur_offset, void *buf,
413 if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
416 CDEBUG(D_OTHER, "looking for log index %u (cur idx %u off "LPU64")\n",
417 next_idx, *cur_idx, *cur_offset);
419 while (*cur_offset < i_size_read(loghandle->lgh_file->f_dentry->d_inode)) {
420 struct llog_rec_hdr *rec;
421 struct llog_rec_tail *tail;
424 llog_skip_over(cur_offset, *cur_idx, next_idx);
427 rc = fsfilt_read_record(loghandle->lgh_ctxt->loc_exp->exp_obd,
428 loghandle->lgh_file, buf, len,
431 CERROR("Cant read llog block at log id "LPU64
432 "/%u offset "LPU64"\n",
433 loghandle->lgh_id.lgl_oid,
434 loghandle->lgh_id.lgl_ogen,
439 /* put number of bytes read into rc to make code simpler */
440 rc = ppos - *cur_offset;
444 /* signal the end of the valid buffer to llog_process */
445 memset(buf + rc, 0, len - rc);
448 if (rc == 0) /* end of file, nothing to do */
451 if (rc < sizeof(*tail)) {
452 CERROR("Invalid llog block at log id "LPU64"/%u offset "
453 LPU64"\n", loghandle->lgh_id.lgl_oid,
454 loghandle->lgh_id.lgl_ogen, *cur_offset);
459 tail = (struct llog_rec_tail *)((char *)buf + rc -
460 sizeof(struct llog_rec_tail));
462 if (LLOG_REC_HDR_NEEDS_SWABBING(rec)) {
463 lustre_swab_llog_rec(rec, tail);
466 *cur_idx = tail->lrt_index;
468 /* this shouldn't happen */
469 if (tail->lrt_index == 0) {
470 CERROR("Invalid llog tail at log id "LPU64"/%u offset "
471 LPU64"\n", loghandle->lgh_id.lgl_oid,
472 loghandle->lgh_id.lgl_ogen, *cur_offset);
475 if (tail->lrt_index < next_idx)
478 /* sanity check that the start of the new buffer is no farther
479 * than the record that we wanted. This shouldn't happen. */
480 if (rec->lrh_index > next_idx) {
481 CERROR("missed desired record? %u > %u\n",
482 rec->lrh_index, next_idx);
490 static int llog_lvfs_prev_block(struct llog_handle *loghandle,
491 int prev_idx, void *buf, int len)
497 if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
500 CDEBUG(D_OTHER, "looking for log index %u\n", prev_idx);
502 cur_offset = LLOG_CHUNK_SIZE;
503 llog_skip_over(&cur_offset, 0, prev_idx);
505 while (cur_offset < i_size_read(loghandle->lgh_file->f_dentry->d_inode)) {
506 struct llog_rec_hdr *rec;
507 struct llog_rec_tail *tail;
512 rc = fsfilt_read_record(loghandle->lgh_ctxt->loc_exp->exp_obd,
513 loghandle->lgh_file, buf, len,
516 CERROR("Cant read llog block at log id "LPU64
517 "/%u offset "LPU64"\n",
518 loghandle->lgh_id.lgl_oid,
519 loghandle->lgh_id.lgl_ogen,
524 /* put number of bytes read into rc to make code simpler */
525 rc = ppos - cur_offset;
528 if (rc == 0) /* end of file, nothing to do */
531 if (rc < sizeof(*tail)) {
532 CERROR("Invalid llog block at log id "LPU64"/%u offset "
533 LPU64"\n", loghandle->lgh_id.lgl_oid,
534 loghandle->lgh_id.lgl_ogen, cur_offset);
538 tail = buf + rc - sizeof(struct llog_rec_tail);
540 /* this shouldn't happen */
541 if (tail->lrt_index == 0) {
542 CERROR("Invalid llog tail at log id "LPU64"/%u offset "
543 LPU64"\n", loghandle->lgh_id.lgl_oid,
544 loghandle->lgh_id.lgl_ogen, cur_offset);
547 if (le32_to_cpu(tail->lrt_index) < prev_idx)
550 /* sanity check that the start of the new buffer is no farther
551 * than the record that we wanted. This shouldn't happen. */
553 if (le32_to_cpu(rec->lrh_index) > prev_idx) {
554 CERROR("missed desired record? %u > %u\n",
555 le32_to_cpu(rec->lrh_index), prev_idx);
563 static struct file *llog_filp_open(char *dir, char *name, int flags, int mode)
569 OBD_ALLOC(logname, PATH_MAX);
571 return ERR_PTR(-ENOMEM);
573 len = snprintf(logname, PATH_MAX, "%s/%s", dir, name);
574 if (len >= PATH_MAX - 1) {
575 filp = ERR_PTR(-ENAMETOOLONG);
577 filp = l_filp_open(logname, flags, mode);
579 CERROR("logfile creation %s: %ld\n", logname,
582 OBD_FREE(logname, PATH_MAX);
586 /* This is a callback from the llog_* functions.
587 * Assumes caller has already pushed us into the kernel context. */
588 static int llog_lvfs_create(struct llog_ctxt *ctxt, struct llog_handle **res,
589 struct llog_logid *logid, char *name)
591 struct llog_handle *handle;
592 struct obd_device *obd;
593 struct l_dentry *dchild = NULL;
594 struct obdo *oa = NULL;
595 int rc = 0, cleanup_phase = 1;
596 int open_flags = O_RDWR | O_CREAT | O_LARGEFILE;
599 handle = llog_alloc_handle();
605 LASSERT(ctxt->loc_exp);
606 obd = ctxt->loc_exp->exp_obd;
609 dchild = obd_lvfs_fid2dentry(ctxt->loc_exp, logid->lgl_oid,
610 logid->lgl_ogen, logid->lgl_ogr);
612 if (IS_ERR(dchild)) {
613 rc = PTR_ERR(dchild);
614 CERROR("error looking up logfile "LPX64":0x%x: rc %d\n",
615 logid->lgl_oid, logid->lgl_ogen, rc);
620 if (dchild->d_inode == NULL) {
622 CERROR("nonexistent log file "LPX64":"LPX64": rc %d\n",
623 logid->lgl_oid, logid->lgl_ogr, rc);
627 handle->lgh_file = l_dentry_open(&obd->obd_lvfs_ctxt, dchild,
628 O_RDWR | O_LARGEFILE);
629 if (IS_ERR(handle->lgh_file)) {
630 rc = PTR_ERR(handle->lgh_file);
631 CERROR("error opening logfile "LPX64"0x%x: rc %d\n",
632 logid->lgl_oid, logid->lgl_ogen, rc);
636 /* assign the value of lgh_id for handle directly */
637 handle->lgh_id = *logid;
640 handle->lgh_file = llog_filp_open(MOUNT_CONFIGS_DIR,
641 name, open_flags, 0644);
642 if (IS_ERR(handle->lgh_file))
643 GOTO(cleanup, rc = PTR_ERR(handle->lgh_file));
645 handle->lgh_id.lgl_ogr = 1;
646 handle->lgh_id.lgl_oid =
647 handle->lgh_file->f_dentry->d_inode->i_ino;
648 handle->lgh_id.lgl_ogen =
649 handle->lgh_file->f_dentry->d_inode->i_generation;
653 GOTO(cleanup, rc = -ENOMEM);
655 oa->o_gr = FILTER_GROUP_LLOG;
656 oa->o_valid = OBD_MD_FLGENER | OBD_MD_FLGROUP;
658 rc = obd_create(ctxt->loc_exp, oa, NULL, NULL);
662 dchild = obd_lvfs_fid2dentry(ctxt->loc_exp, oa->o_id,
663 oa->o_generation, oa->o_gr);
666 GOTO(cleanup, rc = PTR_ERR(dchild));
668 handle->lgh_file = l_dentry_open(&obd->obd_lvfs_ctxt, dchild,
670 if (IS_ERR(handle->lgh_file))
671 GOTO(cleanup, rc = PTR_ERR(handle->lgh_file));
673 handle->lgh_id.lgl_ogr = oa->o_gr;
674 handle->lgh_id.lgl_oid = oa->o_id;
675 handle->lgh_id.lgl_ogen = oa->o_generation;
678 handle->lgh_ctxt = ctxt;
684 switch (cleanup_phase) {
688 llog_free_handle(handle);
693 static int llog_lvfs_close(struct llog_handle *handle)
698 rc = filp_close(handle->lgh_file, 0);
700 CERROR("error closing log: rc %d\n", rc);
704 static int llog_lvfs_destroy(struct llog_handle *handle)
706 struct dentry *fdentry;
708 struct obd_device *obd = handle->lgh_ctxt->loc_exp->exp_obd;
713 dir = MOUNT_CONFIGS_DIR;
715 fdentry = handle->lgh_file->f_dentry;
716 if (strcmp(fdentry->d_parent->d_name.name, dir) == 0) {
717 struct inode *inode = fdentry->d_parent->d_inode;
718 struct lvfs_run_ctxt saved;
719 struct vfsmount *mnt = mntget(handle->lgh_file->f_vfsmnt);
721 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
723 rc = llog_lvfs_close(handle);
726 LOCK_INODE_MUTEX_PARENT(inode);
727 rc = ll_vfs_unlink(inode, fdentry, mnt);
728 UNLOCK_INODE_MUTEX(inode);
733 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
741 oa->o_id = handle->lgh_id.lgl_oid;
742 oa->o_gr = handle->lgh_id.lgl_ogr;
743 oa->o_generation = handle->lgh_id.lgl_ogen;
744 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP | OBD_MD_FLGENER;
746 rc = llog_lvfs_close(handle);
750 rc = obd_destroy(handle->lgh_ctxt->loc_exp, oa, NULL, NULL, NULL, NULL);
756 /* reads the catalog list */
757 int llog_get_cat_list(struct obd_device *obd, struct obd_device *disk_obd,
758 char *name, int idx, int count, struct llog_catid *idarray)
760 struct lvfs_run_ctxt saved;
763 int size = sizeof(*idarray) * count;
764 loff_t off = idx * sizeof(*idarray);
770 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
771 file = filp_open(name, O_RDWR | O_CREAT | O_LARGEFILE, 0700);
772 if (!file || IS_ERR(file)) {
774 CERROR("OBD filter: cannot open/create %s: rc = %d\n",
779 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
780 CERROR("%s is not a regular file!: mode = %o\n", name,
781 file->f_dentry->d_inode->i_mode);
782 GOTO(out, rc = -ENOENT);
785 CDEBUG(D_CONFIG, "cat list: disk size=%d, read=%d\n",
786 (int)i_size_read(file->f_dentry->d_inode), size);
788 /* read for new ost index or for empty file */
789 memset(idarray, 0, size);
790 if (i_size_read(file->f_dentry->d_inode) < off)
793 rc = fsfilt_read_record(disk_obd, file, idarray, size, &off);
795 CERROR("OBD filter: error reading %s: rc %d\n", name, rc);
801 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
802 if (file && !IS_ERR(file))
803 rc1 = filp_close(file, 0);
808 EXPORT_SYMBOL(llog_get_cat_list);
810 /* writes the cat list */
811 int llog_put_cat_list(struct obd_device *obd, struct obd_device *disk_obd,
812 char *name, int idx, int count, struct llog_catid *idarray)
814 struct lvfs_run_ctxt saved;
817 int size = sizeof(*idarray) * count;
818 loff_t off = idx * sizeof(*idarray);
823 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
824 file = filp_open(name, O_RDWR | O_CREAT | O_LARGEFILE, 0700);
825 if (!file || IS_ERR(file)) {
827 CERROR("OBD filter: cannot open/create %s: rc = %d\n",
832 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
833 CERROR("%s is not a regular file!: mode = %o\n", name,
834 file->f_dentry->d_inode->i_mode);
835 GOTO(out, rc = -ENOENT);
838 rc = fsfilt_write_record(disk_obd, file, idarray, size, &off, 1);
840 CDEBUG(D_INODE,"OBD filter: error writeing %s: rc %d\n",
846 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
847 if (file && !IS_ERR(file))
848 rc1 = filp_close(file, 0);
855 EXPORT_SYMBOL(llog_put_cat_list);
857 struct llog_operations llog_lvfs_ops = {
858 lop_write_rec: llog_lvfs_write_rec,
859 lop_next_block: llog_lvfs_next_block,
860 lop_prev_block: llog_lvfs_prev_block,
861 lop_read_header: llog_lvfs_read_header,
862 lop_create: llog_lvfs_create,
863 lop_destroy: llog_lvfs_destroy,
864 lop_close: llog_lvfs_close,
865 // lop_cancel: llog_lvfs_cancel,
868 EXPORT_SYMBOL(llog_lvfs_ops);
870 #else /* !__KERNEL__ */
872 static int llog_lvfs_read_header(struct llog_handle *handle)
878 static int llog_lvfs_write_rec(struct llog_handle *loghandle,
879 struct llog_rec_hdr *rec,
880 struct llog_cookie *reccookie, int cookiecount,
887 static int llog_lvfs_next_block(struct llog_handle *loghandle, int *cur_idx,
888 int next_idx, __u64 *cur_offset, void *buf,
895 static int llog_lvfs_prev_block(struct llog_handle *loghandle,
896 int prev_idx, void *buf, int len)
902 static int llog_lvfs_create(struct llog_ctxt *ctxt, struct llog_handle **res,
903 struct llog_logid *logid, char *name)
909 static int llog_lvfs_close(struct llog_handle *handle)
915 static int llog_lvfs_destroy(struct llog_handle *handle)
921 int llog_get_cat_list(struct obd_device *obd, struct obd_device *disk_obd,
922 char *name, int idx, int count, struct llog_catid *idarray)
928 int llog_put_cat_list(struct obd_device *obd, struct obd_device *disk_obd,
929 char *name, int idx, int count, struct llog_catid *idarray)
935 struct llog_operations llog_lvfs_ops = {
936 lop_write_rec: llog_lvfs_write_rec,
937 lop_next_block: llog_lvfs_next_block,
938 lop_prev_block: llog_lvfs_prev_block,
939 lop_read_header: llog_lvfs_read_header,
940 lop_create: llog_lvfs_create,
941 lop_destroy: llog_lvfs_destroy,
942 lop_close: llog_lvfs_close,
943 // lop_cancel: llog_lvfs_cancel,