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;
111 CWARN("0-length record\n");
114 rc = fsfilt_write_record(obd, file, rec, buflen,&file->f_pos,0);
116 CERROR("error writing log record: rc %d\n", rc);
123 rec->lrh_len = sizeof(*rec) + buflen + sizeof(end);
124 rc = fsfilt_write_record(obd, file, rec, sizeof(*rec), &file->f_pos, 0);
126 CERROR("error writing log hdr: rc %d\n", rc);
130 rc = fsfilt_write_record(obd, file, buf, buflen, &file->f_pos, 0);
132 CERROR("error writing log buffer: rc %d\n", rc);
136 end.lrt_len = rec->lrh_len;
137 end.lrt_index = rec->lrh_index;
138 rc = fsfilt_write_record(obd, file, &end, sizeof(end), &file->f_pos, 0);
140 CERROR("error writing log tail: rc %d\n", rc);
146 if (saved_off > file->f_pos)
147 file->f_pos = saved_off;
152 static int llog_lvfs_read_blob(struct obd_device *obd, struct l_file *file,
153 void *buf, int size, loff_t off)
159 rc = fsfilt_read_record(obd, file, buf, size, &offset);
161 CERROR("error reading log record: rc %d\n", rc);
167 static int llog_lvfs_read_header(struct llog_handle *handle)
169 struct obd_device *obd;
173 LASSERT(sizeof(*handle->lgh_hdr) == LLOG_CHUNK_SIZE);
175 obd = handle->lgh_ctxt->loc_exp->exp_obd;
177 if (i_size_read(handle->lgh_file->f_dentry->d_inode) == 0) {
178 CDEBUG(D_RPCTRACE, "not reading header from 0-byte log\n");
182 rc = llog_lvfs_read_blob(obd, handle->lgh_file, handle->lgh_hdr,
185 CERROR("error reading log header from %.*s\n",
186 handle->lgh_file->f_dentry->d_name.len,
187 handle->lgh_file->f_dentry->d_name.name);
189 struct llog_rec_hdr *llh_hdr = &handle->lgh_hdr->llh_hdr;
191 if (LLOG_REC_HDR_NEEDS_SWABBING(llh_hdr))
192 lustre_swab_llog_hdr(handle->lgh_hdr);
194 if (llh_hdr->lrh_type != LLOG_HDR_MAGIC) {
195 CERROR("bad log %.*s header magic: %#x (expected %#x)\n",
196 handle->lgh_file->f_dentry->d_name.len,
197 handle->lgh_file->f_dentry->d_name.name,
198 llh_hdr->lrh_type, LLOG_HDR_MAGIC);
200 } else if (llh_hdr->lrh_len != LLOG_CHUNK_SIZE) {
201 CERROR("incorrectly sized log %.*s header: %#x "
203 handle->lgh_file->f_dentry->d_name.len,
204 handle->lgh_file->f_dentry->d_name.name,
205 llh_hdr->lrh_len, LLOG_CHUNK_SIZE);
206 CERROR("you may need to re-run lconf --write_conf.\n");
211 handle->lgh_last_idx = handle->lgh_hdr->llh_tail.lrt_index;
212 handle->lgh_file->f_pos = i_size_read(handle->lgh_file->f_dentry->d_inode);
217 /* returns negative in on error; 0 if success && reccookie == 0; 1 otherwise */
218 /* appends if idx == -1, otherwise overwrites record idx. */
219 static int llog_lvfs_write_rec(struct llog_handle *loghandle,
220 struct llog_rec_hdr *rec,
221 struct llog_cookie *reccookie, int cookiecount,
224 struct llog_log_hdr *llh;
225 int reclen = rec->lrh_len, index, rc;
226 struct llog_rec_tail *lrt;
227 struct obd_device *obd;
232 llh = loghandle->lgh_hdr;
233 file = loghandle->lgh_file;
234 obd = loghandle->lgh_ctxt->loc_exp->exp_obd;
236 /* record length should not bigger than LLOG_CHUNK_SIZE */
238 rc = (reclen > LLOG_CHUNK_SIZE - sizeof(struct llog_rec_hdr) -
239 sizeof(struct llog_rec_tail)) ? -E2BIG : 0;
241 rc = (reclen > LLOG_CHUNK_SIZE) ? -E2BIG : 0;
246 /* write_blob adds header and tail to lrh_len. */
247 reclen = sizeof(*rec) + rec->lrh_len +
248 sizeof(struct llog_rec_tail);
253 /* no header: only allowed to insert record 1 */
254 if (idx != 1 && !i_size_read(file->f_dentry->d_inode)) {
255 CERROR("idx != -1 in empty log\n");
259 if (idx && llh->llh_size && llh->llh_size != rec->lrh_len)
262 if (!ext2_test_bit(idx, llh->llh_bitmap))
263 CERROR("Modify unset record %u\n", idx);
264 if (idx != rec->lrh_index)
265 CERROR("Index mismatch %d %u\n", idx, rec->lrh_index);
267 rc = llog_lvfs_write_blob(obd, file, &llh->llh_hdr, NULL, 0);
268 /* we are done if we only write the header or on error */
272 /* Assumes constant lrh_len */
273 saved_offset = sizeof(*llh) + (idx - 1) * reclen;
276 struct llog_rec_hdr check;
278 /* We assume that caller has set lgh_cur_* */
279 saved_offset = loghandle->lgh_cur_offset;
281 "modify record "LPX64": idx:%d/%u/%d, len:%u "
283 loghandle->lgh_id.lgl_oid, idx, rec->lrh_index,
284 loghandle->lgh_cur_idx, rec->lrh_len,
285 (long long)(saved_offset - sizeof(*llh)));
286 if (rec->lrh_index != loghandle->lgh_cur_idx) {
287 CERROR("modify idx mismatch %u/%d\n",
288 idx, loghandle->lgh_cur_idx);
291 #if 1 /* FIXME remove this safety check at some point */
292 /* Verify that the record we're modifying is the
294 rc = llog_lvfs_read_blob(obd, file, &check,
295 sizeof(check), saved_offset);
296 if (check.lrh_index != idx || check.lrh_len != reclen) {
297 CERROR("Bad modify idx %u/%u size %u/%u (%d)\n",
298 idx, check.lrh_index, reclen,
305 rc = llog_lvfs_write_blob(obd, file, rec, buf, saved_offset);
306 if (rc == 0 && reccookie) {
307 reccookie->lgc_lgl = loghandle->lgh_id;
308 reccookie->lgc_index = idx;
314 /* Make sure that records don't cross a chunk boundary, so we can
315 * process them page-at-a-time if needed. If it will cross a chunk
316 * boundary, write in a fake (but referenced) entry to pad the chunk.
318 * We know that llog_current_log() will return a loghandle that is
319 * big enough to hold reclen, so all we care about is padding here.
321 left = LLOG_CHUNK_SIZE - (file->f_pos & (LLOG_CHUNK_SIZE - 1));
323 /* NOTE: padding is a record, but no bit is set */
324 if (left != 0 && left != reclen &&
325 left < (reclen + LLOG_MIN_REC_SIZE)) {
326 index = loghandle->lgh_last_idx + 1;
327 rc = llog_lvfs_pad(obd, file, left, index);
330 loghandle->lgh_last_idx++; /*for pad rec*/
332 /* if it's the last idx in log file, then return -ENOSPC */
333 if (loghandle->lgh_last_idx >= LLOG_BITMAP_SIZE(llh) - 1)
335 index = ++loghandle->lgh_last_idx;
336 rec->lrh_index = index;
338 lrt = (struct llog_rec_tail *)
339 ((char *)rec + rec->lrh_len - sizeof(*lrt));
340 lrt->lrt_len = rec->lrh_len;
341 lrt->lrt_index = rec->lrh_index;
343 /*The caller should make sure only 1 process access the lgh_last_idx,
344 *Otherwise it might hit the assert.*/
345 LASSERT(index < LLOG_BITMAP_SIZE(llh));
346 if (ext2_set_bit(index, llh->llh_bitmap)) {
347 CERROR("argh, index %u already set in log bitmap?\n", index);
348 LBUG(); /* should never happen */
351 llh->llh_tail.lrt_index = index;
353 rc = llog_lvfs_write_blob(obd, file, &llh->llh_hdr, NULL, 0);
357 rc = llog_lvfs_write_blob(obd, file, rec, buf, file->f_pos);
361 CDEBUG(D_RPCTRACE, "added record "LPX64": idx: %u, %u bytes\n",
362 loghandle->lgh_id.lgl_oid, index, rec->lrh_len);
363 if (rc == 0 && reccookie) {
364 reccookie->lgc_lgl = loghandle->lgh_id;
365 reccookie->lgc_index = index;
366 if ((rec->lrh_type == MDS_UNLINK_REC) ||
367 (rec->lrh_type == MDS_SETATTR_REC))
368 reccookie->lgc_subsys = LLOG_MDS_OST_ORIG_CTXT;
369 else if (rec->lrh_type == OST_SZ_REC)
370 reccookie->lgc_subsys = LLOG_SIZE_ORIG_CTXT;
371 else if (rec->lrh_type == OST_RAID1_REC)
372 reccookie->lgc_subsys = LLOG_RD1_ORIG_CTXT;
374 reccookie->lgc_subsys = -1;
377 if (rc == 0 && rec->lrh_type == LLOG_GEN_REC)
383 /* We can skip reading at least as many log blocks as the number of
384 * minimum sized log records we are skipping. If it turns out
385 * that we are not far enough along the log (because the
386 * actual records are larger than minimum size) we just skip
387 * some more records. */
389 static void llog_skip_over(__u64 *off, int curr, int goal)
393 *off = (*off + (goal-curr-1) * LLOG_MIN_REC_SIZE) &
394 ~(LLOG_CHUNK_SIZE - 1);
399 * - cur_offset to the furthest point read in the log file
400 * - cur_idx to the log index preceeding cur_offset
401 * returns -EIO/-EINVAL on error
403 static int llog_lvfs_next_block(struct llog_handle *loghandle, int *cur_idx,
404 int next_idx, __u64 *cur_offset, void *buf,
410 if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
413 CDEBUG(D_OTHER, "looking for log index %u (cur idx %u off "LPU64")\n",
414 next_idx, *cur_idx, *cur_offset);
416 while (*cur_offset < i_size_read(loghandle->lgh_file->f_dentry->d_inode)) {
417 struct llog_rec_hdr *rec;
418 struct llog_rec_tail *tail;
421 llog_skip_over(cur_offset, *cur_idx, next_idx);
424 rc = fsfilt_read_record(loghandle->lgh_ctxt->loc_exp->exp_obd,
425 loghandle->lgh_file, buf, len,
428 CERROR("Cant read llog block at log id "LPU64
429 "/%u offset "LPU64"\n",
430 loghandle->lgh_id.lgl_oid,
431 loghandle->lgh_id.lgl_ogen,
436 /* put number of bytes read into rc to make code simpler */
437 rc = ppos - *cur_offset;
441 /* signal the end of the valid buffer to llog_process */
442 memset(buf + rc, 0, len - rc);
445 if (rc == 0) /* end of file, nothing to do */
448 if (rc < sizeof(*tail)) {
449 CERROR("Invalid llog block at log id "LPU64"/%u offset "
450 LPU64"\n", loghandle->lgh_id.lgl_oid,
451 loghandle->lgh_id.lgl_ogen, *cur_offset);
456 tail = (struct llog_rec_tail *)((char *)buf + rc -
457 sizeof(struct llog_rec_tail));
459 if (LLOG_REC_HDR_NEEDS_SWABBING(rec)) {
460 lustre_swab_llog_rec(rec, tail);
463 *cur_idx = tail->lrt_index;
465 /* this shouldn't happen */
466 if (tail->lrt_index == 0) {
467 CERROR("Invalid llog tail at log id "LPU64"/%u offset "
468 LPU64"\n", loghandle->lgh_id.lgl_oid,
469 loghandle->lgh_id.lgl_ogen, *cur_offset);
472 if (tail->lrt_index < next_idx)
475 /* sanity check that the start of the new buffer is no farther
476 * than the record that we wanted. This shouldn't happen. */
477 if (rec->lrh_index > next_idx) {
478 CERROR("missed desired record? %u > %u\n",
479 rec->lrh_index, next_idx);
487 static int llog_lvfs_prev_block(struct llog_handle *loghandle,
488 int prev_idx, void *buf, int len)
494 if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
497 CDEBUG(D_OTHER, "looking for log index %u\n", prev_idx);
499 cur_offset = LLOG_CHUNK_SIZE;
500 llog_skip_over(&cur_offset, 0, prev_idx);
502 while (cur_offset < i_size_read(loghandle->lgh_file->f_dentry->d_inode)) {
503 struct llog_rec_hdr *rec;
504 struct llog_rec_tail *tail;
509 rc = fsfilt_read_record(loghandle->lgh_ctxt->loc_exp->exp_obd,
510 loghandle->lgh_file, buf, len,
513 CERROR("Cant read llog block at log id "LPU64
514 "/%u offset "LPU64"\n",
515 loghandle->lgh_id.lgl_oid,
516 loghandle->lgh_id.lgl_ogen,
521 /* put number of bytes read into rc to make code simpler */
522 rc = ppos - cur_offset;
525 if (rc == 0) /* end of file, nothing to do */
528 if (rc < sizeof(*tail)) {
529 CERROR("Invalid llog block at log id "LPU64"/%u offset "
530 LPU64"\n", loghandle->lgh_id.lgl_oid,
531 loghandle->lgh_id.lgl_ogen, cur_offset);
535 tail = buf + rc - sizeof(struct llog_rec_tail);
537 /* this shouldn't happen */
538 if (tail->lrt_index == 0) {
539 CERROR("Invalid llog tail at log id "LPU64"/%u offset "
540 LPU64"\n", loghandle->lgh_id.lgl_oid,
541 loghandle->lgh_id.lgl_ogen, cur_offset);
544 if (le32_to_cpu(tail->lrt_index) < prev_idx)
547 /* sanity check that the start of the new buffer is no farther
548 * than the record that we wanted. This shouldn't happen. */
550 if (le32_to_cpu(rec->lrh_index) > prev_idx) {
551 CERROR("missed desired record? %u > %u\n",
552 le32_to_cpu(rec->lrh_index), prev_idx);
560 static struct file *llog_filp_open(char *dir, char *name, int flags, int mode)
566 OBD_ALLOC(logname, PATH_MAX);
568 return ERR_PTR(-ENOMEM);
570 len = snprintf(logname, PATH_MAX, "%s/%s", dir, name);
571 if (len >= PATH_MAX - 1) {
572 filp = ERR_PTR(-ENAMETOOLONG);
574 filp = l_filp_open(logname, flags, mode);
576 CERROR("logfile creation %s: %ld\n", logname,
579 OBD_FREE(logname, PATH_MAX);
583 /* This is a callback from the llog_* functions.
584 * Assumes caller has already pushed us into the kernel context. */
585 static int llog_lvfs_create(struct llog_ctxt *ctxt, struct llog_handle **res,
586 struct llog_logid *logid, char *name)
588 struct llog_handle *handle;
589 struct obd_device *obd;
590 struct l_dentry *dchild = NULL;
591 struct obdo *oa = NULL;
592 int rc = 0, cleanup_phase = 1;
593 int open_flags = O_RDWR | O_CREAT | O_LARGEFILE;
596 handle = llog_alloc_handle();
602 LASSERT(ctxt->loc_exp);
603 obd = ctxt->loc_exp->exp_obd;
606 dchild = obd_lvfs_fid2dentry(ctxt->loc_exp, logid->lgl_oid,
607 logid->lgl_ogen, logid->lgl_ogr);
609 if (IS_ERR(dchild)) {
610 rc = PTR_ERR(dchild);
611 CERROR("error looking up logfile "LPX64":0x%x: rc %d\n",
612 logid->lgl_oid, logid->lgl_ogen, rc);
617 if (dchild->d_inode == NULL) {
619 CERROR("nonexistent log file "LPX64":"LPX64": rc %d\n",
620 logid->lgl_oid, logid->lgl_ogr, rc);
624 handle->lgh_file = l_dentry_open(&obd->obd_lvfs_ctxt, dchild,
625 O_RDWR | O_LARGEFILE);
626 if (IS_ERR(handle->lgh_file)) {
627 rc = PTR_ERR(handle->lgh_file);
628 CERROR("error opening logfile "LPX64"0x%x: rc %d\n",
629 logid->lgl_oid, logid->lgl_ogen, rc);
633 /* assign the value of lgh_id for handle directly */
634 handle->lgh_id = *logid;
638 if (strcmp(obd->obd_type->typ_name, LUSTRE_MDS_NAME) == 0) {
639 handle->lgh_file = llog_filp_open(MDT_LOGS_DIR, name,
643 handle->lgh_file = llog_filp_open(MOUNT_CONFIGS_DIR,
647 if (IS_ERR(handle->lgh_file))
648 GOTO(cleanup, rc = PTR_ERR(handle->lgh_file));
650 handle->lgh_id.lgl_ogr = 1;
651 handle->lgh_id.lgl_oid =
652 handle->lgh_file->f_dentry->d_inode->i_ino;
653 handle->lgh_id.lgl_ogen =
654 handle->lgh_file->f_dentry->d_inode->i_generation;
658 GOTO(cleanup, rc = -ENOMEM);
660 oa->o_gr = FILTER_GROUP_LLOG;
661 oa->o_valid = OBD_MD_FLGENER | OBD_MD_FLGROUP;
663 rc = obd_create(ctxt->loc_exp, oa, NULL, NULL);
667 dchild = obd_lvfs_fid2dentry(ctxt->loc_exp, oa->o_id,
668 oa->o_generation, oa->o_gr);
671 GOTO(cleanup, rc = PTR_ERR(dchild));
673 handle->lgh_file = l_dentry_open(&obd->obd_lvfs_ctxt, dchild,
675 if (IS_ERR(handle->lgh_file))
676 GOTO(cleanup, rc = PTR_ERR(handle->lgh_file));
678 handle->lgh_id.lgl_ogr = oa->o_gr;
679 handle->lgh_id.lgl_oid = oa->o_id;
680 handle->lgh_id.lgl_ogen = oa->o_generation;
683 handle->lgh_ctxt = ctxt;
689 switch (cleanup_phase) {
693 llog_free_handle(handle);
698 static int llog_lvfs_close(struct llog_handle *handle)
703 rc = filp_close(handle->lgh_file, 0);
705 CERROR("error closing log: rc %d\n", rc);
709 static int llog_lvfs_destroy(struct llog_handle *handle)
711 struct dentry *fdentry;
713 struct obd_device *obd = handle->lgh_ctxt->loc_exp->exp_obd;
719 if (strcmp(obd->obd_type->typ_name, LUSTRE_MDS_NAME) == 0)
723 dir = MOUNT_CONFIGS_DIR;
725 fdentry = handle->lgh_file->f_dentry;
726 if (strcmp(fdentry->d_parent->d_name.name, dir) == 0) {
727 struct inode *inode = fdentry->d_parent->d_inode;
728 struct lvfs_run_ctxt saved;
729 struct vfsmount *mnt = mntget(handle->lgh_file->f_vfsmnt);
731 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
733 rc = llog_lvfs_close(handle);
736 LOCK_INODE_MUTEX(inode);
737 rc = ll_vfs_unlink(inode, fdentry, mnt);
738 UNLOCK_INODE_MUTEX(inode);
743 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
751 oa->o_id = handle->lgh_id.lgl_oid;
752 oa->o_gr = handle->lgh_id.lgl_ogr;
753 oa->o_generation = handle->lgh_id.lgl_ogen;
754 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP | OBD_MD_FLGENER;
756 rc = llog_lvfs_close(handle);
760 rc = obd_destroy(handle->lgh_ctxt->loc_exp, oa, NULL, NULL, NULL);
766 /* reads the catalog list */
767 int llog_get_cat_list(struct obd_device *obd, struct obd_device *disk_obd,
768 char *name, int idx, int count, struct llog_catid *idarray)
770 struct lvfs_run_ctxt saved;
773 int size = sizeof(*idarray) * count;
774 loff_t off = idx * sizeof(*idarray);
780 LASSERT_SEM_LOCKED(&obd->obd_llog_cat_process);
782 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
783 file = filp_open(name, O_RDWR | O_CREAT | O_LARGEFILE, 0700);
784 if (!file || IS_ERR(file)) {
786 CERROR("OBD filter: cannot open/create %s: rc = %d\n",
791 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
792 CERROR("%s is not a regular file!: mode = %o\n", name,
793 file->f_dentry->d_inode->i_mode);
794 GOTO(out, rc = -ENOENT);
797 CDEBUG(D_CONFIG, "cat list: disk size=%d, read=%d\n",
798 (int)i_size_read(file->f_dentry->d_inode), size);
800 memset(idarray, 0, size);
801 /* read for new ost index or for empty file */
802 if (i_size_read(file->f_dentry->d_inode) < off)
805 rc = fsfilt_read_record(disk_obd, file, idarray, size, &off);
807 CERROR("OBD filter: error reading %s: rc %d\n", name, rc);
813 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
814 if (file && !IS_ERR(file))
815 rc1 = filp_close(file, 0);
820 EXPORT_SYMBOL(llog_get_cat_list);
822 /* writes the cat list */
823 int llog_put_cat_list(struct obd_device *obd, struct obd_device *disk_obd,
824 char *name, int idx, int count, struct llog_catid *idarray)
826 struct lvfs_run_ctxt saved;
829 int size = sizeof(*idarray) * count;
830 loff_t off = idx * sizeof(*idarray);
835 LASSERT_SEM_LOCKED(&obd->obd_llog_cat_process);
836 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
837 file = filp_open(name, O_RDWR | O_CREAT | O_LARGEFILE, 0700);
838 if (!file || IS_ERR(file)) {
840 CERROR("OBD filter: cannot open/create %s: rc = %d\n",
845 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
846 CERROR("%s is not a regular file!: mode = %o\n", name,
847 file->f_dentry->d_inode->i_mode);
848 GOTO(out, rc = -ENOENT);
851 rc = fsfilt_write_record(disk_obd, file, idarray, size, &off, 1);
853 CDEBUG(D_INODE,"OBD filter: error writeing %s: rc %d\n",
859 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
860 if (file && !IS_ERR(file))
861 rc1 = filp_close(file, 0);
868 EXPORT_SYMBOL(llog_put_cat_list);
870 struct llog_operations llog_lvfs_ops = {
871 lop_write_rec: llog_lvfs_write_rec,
872 lop_next_block: llog_lvfs_next_block,
873 lop_prev_block: llog_lvfs_prev_block,
874 lop_read_header: llog_lvfs_read_header,
875 lop_create: llog_lvfs_create,
876 lop_destroy: llog_lvfs_destroy,
877 lop_close: llog_lvfs_close,
878 // lop_cancel: llog_lvfs_cancel,
881 EXPORT_SYMBOL(llog_lvfs_ops);
883 #else /* !__KERNEL__ */
885 static int llog_lvfs_read_header(struct llog_handle *handle)
891 static int llog_lvfs_write_rec(struct llog_handle *loghandle,
892 struct llog_rec_hdr *rec,
893 struct llog_cookie *reccookie, int cookiecount,
900 static int llog_lvfs_next_block(struct llog_handle *loghandle, int *cur_idx,
901 int next_idx, __u64 *cur_offset, void *buf,
908 static int llog_lvfs_prev_block(struct llog_handle *loghandle,
909 int prev_idx, void *buf, int len)
915 static int llog_lvfs_create(struct llog_ctxt *ctxt, struct llog_handle **res,
916 struct llog_logid *logid, char *name)
922 static int llog_lvfs_close(struct llog_handle *handle)
928 static int llog_lvfs_destroy(struct llog_handle *handle)
934 int llog_get_cat_list(struct obd_device *obd, struct obd_device *disk_obd,
935 char *name, int idx, int count, struct llog_catid *idarray)
941 int llog_put_cat_list(struct obd_device *obd, struct obd_device *disk_obd,
942 char *name, int idx, int count, struct llog_catid *idarray)
948 struct llog_operations llog_lvfs_ops = {
949 lop_write_rec: llog_lvfs_write_rec,
950 lop_next_block: llog_lvfs_next_block,
951 lop_prev_block: llog_lvfs_prev_block,
952 lop_read_header: llog_lvfs_read_header,
953 lop_create: llog_lvfs_create,
954 lop_destroy: llog_lvfs_destroy,
955 lop_close: llog_lvfs_close,
956 // lop_cancel: llog_lvfs_cancel,