staging/lustre/obdclass: remove unused file llog_lvfs.c
authorOleg Drokin <green@linuxhacker.ru>
Thu, 28 Aug 2014 18:54:21 +0000 (14:54 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 30 Aug 2014 19:14:44 +0000 (12:14 -0700)
This contains server-side llog operations.
Also remove declaration of public structure from lustre_log.h

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/staging/lustre/lustre/include/lustre_log.h
drivers/staging/lustre/lustre/obdclass/llog_lvfs.c [deleted file]

index d02ea24a7e404e585b715f99504b3f0e5895645a..c2ab294aef5ec8996febd672c1d54d518566fda9 100644 (file)
@@ -315,9 +315,6 @@ struct llog_handle {
        atomic_t                 lgh_refcount;
 };
 
-/* llog_lvfs.c */
-extern struct llog_operations llog_lvfs_ops;
-
 /* llog_osd.c */
 extern struct llog_operations llog_osd_ops;
 int llog_osd_get_cat_list(const struct lu_env *env, struct dt_device *d,
diff --git a/drivers/staging/lustre/lustre/obdclass/llog_lvfs.c b/drivers/staging/lustre/lustre/obdclass/llog_lvfs.c
deleted file mode 100644 (file)
index f6632db..0000000
+++ /dev/null
@@ -1,849 +0,0 @@
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2011, 2012, Intel Corporation.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * lustre/obdclass/llog_lvfs.c
- *
- * OST<->MDS recovery logging infrastructure.
- * Invariants in implementation:
- * - we do not share logs among different OST<->MDS connections, so that
- *   if an OST or MDS fails it need only look at log(s) relevant to itself
- *
- * Author: Andreas Dilger <adilger@clusterfs.com>
- */
-
-#define DEBUG_SUBSYSTEM S_LOG
-
-
-#include "../include/obd.h"
-#include "../include/obd_class.h"
-#include "../include/lustre_log.h"
-#include "../include/obd_ost.h"
-#include <linux/list.h>
-#include "../include/lvfs.h"
-#include "../include/lustre_fsfilt.h"
-#include "../include/lustre_disk.h"
-#include "llog_internal.h"
-
-#if  defined(LLOG_LVFS)
-
-static int llog_lvfs_pad(struct obd_device *obd, struct file *file, int len,
-                        int index)
-{
-       struct llog_rec_hdr rec = { 0 };
-       struct llog_rec_tail tail;
-       int rc;
-
-       LASSERT(len >= LLOG_MIN_REC_SIZE && (len & 0x7) == 0);
-
-       tail.lrt_len = rec.lrh_len = len;
-       tail.lrt_index = rec.lrh_index = index;
-       rec.lrh_type = LLOG_PAD_MAGIC;
-
-       rc = fsfilt_write_record(obd, file, &rec, sizeof(rec), &file->f_pos, 0);
-       if (rc) {
-               CERROR("error writing padding record: rc %d\n", rc);
-               goto out;
-       }
-
-       file->f_pos += len - sizeof(rec) - sizeof(tail);
-       rc = fsfilt_write_record(obd, file, &tail, sizeof(tail),
-                                &file->f_pos, 0);
-       if (rc) {
-               CERROR("error writing padding record: rc %d\n", rc);
-               goto out;
-       }
-
- out:
-       return rc;
-}
-
-static int llog_lvfs_write_blob(struct obd_device *obd, struct file *file,
-                               struct llog_rec_hdr *rec, void *buf, loff_t off)
-{
-       int rc;
-       struct llog_rec_tail end;
-       loff_t saved_off = file->f_pos;
-       int buflen = rec->lrh_len;
-
-       file->f_pos = off;
-
-       if (buflen == 0)
-               CWARN("0-length record\n");
-
-       if (!buf) {
-               rc = fsfilt_write_record(obd, file, rec, buflen,
-                                        &file->f_pos, 0);
-               if (rc) {
-                       CERROR("error writing log record: rc %d\n", rc);
-                       goto out;
-               }
-               GOTO(out, rc = 0);
-       }
-
-       /* the buf case */
-       rec->lrh_len = sizeof(*rec) + buflen + sizeof(end);
-       rc = fsfilt_write_record(obd, file, rec, sizeof(*rec), &file->f_pos, 0);
-       if (rc) {
-               CERROR("error writing log hdr: rc %d\n", rc);
-               goto out;
-       }
-
-       rc = fsfilt_write_record(obd, file, buf, buflen, &file->f_pos, 0);
-       if (rc) {
-               CERROR("error writing log buffer: rc %d\n", rc);
-               goto out;
-       }
-
-       end.lrt_len = rec->lrh_len;
-       end.lrt_index = rec->lrh_index;
-       rc = fsfilt_write_record(obd, file, &end, sizeof(end), &file->f_pos, 0);
-       if (rc) {
-               CERROR("error writing log tail: rc %d\n", rc);
-               goto out;
-       }
-
-       rc = 0;
- out:
-       if (saved_off > file->f_pos)
-               file->f_pos = saved_off;
-       LASSERT(rc <= 0);
-       return rc;
-}
-
-static int llog_lvfs_read_blob(struct obd_device *obd, struct file *file,
-                               void *buf, int size, loff_t off)
-{
-       loff_t offset = off;
-       int rc;
-
-       rc = fsfilt_read_record(obd, file, buf, size, &offset);
-       if (rc) {
-               CERROR("error reading log record: rc %d\n", rc);
-               return rc;
-       }
-       return 0;
-}
-
-static int llog_lvfs_read_header(const struct lu_env *env,
-                                struct llog_handle *handle)
-{
-       struct obd_device *obd;
-       int rc;
-
-       LASSERT(sizeof(*handle->lgh_hdr) == LLOG_CHUNK_SIZE);
-
-       obd = handle->lgh_ctxt->loc_exp->exp_obd;
-
-       if (i_size_read(handle->lgh_file->f_dentry->d_inode) == 0) {
-               CDEBUG(D_HA, "not reading header from 0-byte log\n");
-               return LLOG_EEMPTY;
-       }
-
-       rc = llog_lvfs_read_blob(obd, handle->lgh_file, handle->lgh_hdr,
-                                LLOG_CHUNK_SIZE, 0);
-       if (rc) {
-               CERROR("error reading log header from %.*s\n",
-                      handle->lgh_file->f_dentry->d_name.len,
-                      handle->lgh_file->f_dentry->d_name.name);
-       } else {
-               struct llog_rec_hdr *llh_hdr = &handle->lgh_hdr->llh_hdr;
-
-               if (LLOG_REC_HDR_NEEDS_SWABBING(llh_hdr))
-                       lustre_swab_llog_hdr(handle->lgh_hdr);
-
-               if (llh_hdr->lrh_type != LLOG_HDR_MAGIC) {
-                       CERROR("bad log %.*s header magic: %#x (expected %#x)\n",
-                              handle->lgh_file->f_dentry->d_name.len,
-                              handle->lgh_file->f_dentry->d_name.name,
-                              llh_hdr->lrh_type, LLOG_HDR_MAGIC);
-                       rc = -EIO;
-               } else if (llh_hdr->lrh_len != LLOG_CHUNK_SIZE) {
-                       CERROR("incorrectly sized log %.*s header: %#x "
-                              "(expected %#x)\n",
-                              handle->lgh_file->f_dentry->d_name.len,
-                              handle->lgh_file->f_dentry->d_name.name,
-                              llh_hdr->lrh_len, LLOG_CHUNK_SIZE);
-                       CERROR("you may need to re-run lconf --write_conf.\n");
-                       rc = -EIO;
-               }
-       }
-
-       handle->lgh_last_idx = handle->lgh_hdr->llh_tail.lrt_index;
-       handle->lgh_file->f_pos = i_size_read(handle->lgh_file->f_dentry->d_inode);
-
-       return rc;
-}
-
-/* returns negative in on error; 0 if success && reccookie == 0; 1 otherwise */
-/* appends if idx == -1, otherwise overwrites record idx. */
-static int llog_lvfs_write_rec(const struct lu_env *env,
-                              struct llog_handle *loghandle,
-                              struct llog_rec_hdr *rec,
-                              struct llog_cookie *reccookie, int cookiecount,
-                              void *buf, int idx, struct thandle *th)
-{
-       struct llog_log_hdr *llh;
-       int reclen = rec->lrh_len, index, rc;
-       struct llog_rec_tail *lrt;
-       struct obd_device *obd;
-       struct file *file;
-       size_t left;
-
-       llh = loghandle->lgh_hdr;
-       file = loghandle->lgh_file;
-       obd = loghandle->lgh_ctxt->loc_exp->exp_obd;
-
-       /* record length should not bigger than LLOG_CHUNK_SIZE */
-       if (buf)
-               rc = (reclen > LLOG_CHUNK_SIZE - sizeof(struct llog_rec_hdr) -
-                     sizeof(struct llog_rec_tail)) ? -E2BIG : 0;
-       else
-               rc = (reclen > LLOG_CHUNK_SIZE) ? -E2BIG : 0;
-       if (rc)
-               return rc;
-
-       if (buf)
-               /* write_blob adds header and tail to lrh_len. */
-               reclen = sizeof(*rec) + rec->lrh_len +
-                        sizeof(struct llog_rec_tail);
-
-       if (idx != -1) {
-               loff_t saved_offset;
-
-               /* no header: only allowed to insert record 1 */
-               if (idx != 1 && !i_size_read(file->f_dentry->d_inode)) {
-                       CERROR("idx != -1 in empty log\n");
-                       LBUG();
-               }
-
-               if (idx && llh->llh_size && llh->llh_size != rec->lrh_len)
-                       return -EINVAL;
-
-               if (!ext2_test_bit(idx, llh->llh_bitmap))
-                       CERROR("Modify unset record %u\n", idx);
-               if (idx != rec->lrh_index)
-                       CERROR("Index mismatch %d %u\n", idx, rec->lrh_index);
-
-               rc = llog_lvfs_write_blob(obd, file, &llh->llh_hdr, NULL, 0);
-               /* we are done if we only write the header or on error */
-               if (rc || idx == 0)
-                       return rc;
-
-               if (buf) {
-                       /* We assume that caller has set lgh_cur_* */
-                       saved_offset = loghandle->lgh_cur_offset;
-                       CDEBUG(D_OTHER,
-                              "modify record "DOSTID": idx:%d/%u/%d, len:%u "
-                              "offset %llu\n",
-                              POSTID(&loghandle->lgh_id.lgl_oi), idx, rec->lrh_index,
-                              loghandle->lgh_cur_idx, rec->lrh_len,
-                              (long long)(saved_offset - sizeof(*llh)));
-                       if (rec->lrh_index != loghandle->lgh_cur_idx) {
-                               CERROR("modify idx mismatch %u/%d\n",
-                                      idx, loghandle->lgh_cur_idx);
-                               return -EFAULT;
-                       }
-               } else {
-                       /* Assumes constant lrh_len */
-                       saved_offset = sizeof(*llh) + (idx - 1) * reclen;
-               }
-
-               rc = llog_lvfs_write_blob(obd, file, rec, buf, saved_offset);
-               if (rc == 0 && reccookie) {
-                       reccookie->lgc_lgl = loghandle->lgh_id;
-                       reccookie->lgc_index = idx;
-                       rc = 1;
-               }
-               return rc;
-       }
-
-       /* Make sure that records don't cross a chunk boundary, so we can
-        * process them page-at-a-time if needed.  If it will cross a chunk
-        * boundary, write in a fake (but referenced) entry to pad the chunk.
-        *
-        * We know that llog_current_log() will return a loghandle that is
-        * big enough to hold reclen, so all we care about is padding here.
-        */
-       left = LLOG_CHUNK_SIZE - (file->f_pos & (LLOG_CHUNK_SIZE - 1));
-
-       /* NOTE: padding is a record, but no bit is set */
-       if (left != 0 && left != reclen &&
-           left < (reclen + LLOG_MIN_REC_SIZE)) {
-                index = loghandle->lgh_last_idx + 1;
-                rc = llog_lvfs_pad(obd, file, left, index);
-                if (rc)
-                        return rc;
-                loghandle->lgh_last_idx++; /*for pad rec*/
-        }
-        /* if it's the last idx in log file, then return -ENOSPC */
-        if (loghandle->lgh_last_idx >= LLOG_BITMAP_SIZE(llh) - 1)
-                return -ENOSPC;
-       loghandle->lgh_last_idx++;
-       index = loghandle->lgh_last_idx;
-       LASSERT(index < LLOG_BITMAP_SIZE(llh));
-       rec->lrh_index = index;
-       if (buf == NULL) {
-               lrt = (struct llog_rec_tail *)
-                       ((char *)rec + rec->lrh_len - sizeof(*lrt));
-               lrt->lrt_len = rec->lrh_len;
-               lrt->lrt_index = rec->lrh_index;
-       }
-       /*The caller should make sure only 1 process access the lgh_last_idx,
-        *Otherwise it might hit the assert.*/
-       LASSERT(index < LLOG_BITMAP_SIZE(llh));
-       spin_lock(&loghandle->lgh_hdr_lock);
-       if (ext2_set_bit(index, llh->llh_bitmap)) {
-               CERROR("argh, index %u already set in log bitmap?\n", index);
-               spin_unlock(&loghandle->lgh_hdr_lock);
-               LBUG(); /* should never happen */
-       }
-       llh->llh_count++;
-       spin_unlock(&loghandle->lgh_hdr_lock);
-       llh->llh_tail.lrt_index = index;
-
-       rc = llog_lvfs_write_blob(obd, file, &llh->llh_hdr, NULL, 0);
-       if (rc)
-               return rc;
-
-       rc = llog_lvfs_write_blob(obd, file, rec, buf, file->f_pos);
-       if (rc)
-               return rc;
-
-       CDEBUG(D_RPCTRACE, "added record "DOSTID": idx: %u, %u \n",
-              POSTID(&loghandle->lgh_id.lgl_oi), index, rec->lrh_len);
-       if (rc == 0 && reccookie) {
-               reccookie->lgc_lgl = loghandle->lgh_id;
-               reccookie->lgc_index = index;
-               if ((rec->lrh_type == MDS_UNLINK_REC) ||
-                   (rec->lrh_type == MDS_SETATTR64_REC))
-                       reccookie->lgc_subsys = LLOG_MDS_OST_ORIG_CTXT;
-               else if (rec->lrh_type == OST_SZ_REC)
-                       reccookie->lgc_subsys = LLOG_SIZE_ORIG_CTXT;
-               else
-                       reccookie->lgc_subsys = -1;
-               rc = 1;
-       }
-       if (rc == 0 && rec->lrh_type == LLOG_GEN_REC)
-               rc = 1;
-
-       return rc;
-}
-
-/* We can skip reading at least as many log blocks as the number of
-* minimum sized log records we are skipping.  If it turns out
-* that we are not far enough along the log (because the
-* actual records are larger than minimum size) we just skip
-* some more records. */
-
-static void llog_skip_over(__u64 *off, int curr, int goal)
-{
-       if (goal <= curr)
-               return;
-       *off = (*off + (goal-curr-1) * LLOG_MIN_REC_SIZE) &
-               ~(LLOG_CHUNK_SIZE - 1);
-}
-
-
-/* sets:
- *  - cur_offset to the furthest point read in the log file
- *  - cur_idx to the log index preceding cur_offset
- * returns -EIO/-EINVAL on error
- */
-static int llog_lvfs_next_block(const struct lu_env *env,
-                               struct llog_handle *loghandle, int *cur_idx,
-                               int next_idx, __u64 *cur_offset, void *buf,
-                               int len)
-{
-       int rc;
-
-       if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
-               return -EINVAL;
-
-       CDEBUG(D_OTHER, "looking for log index %u (cur idx %u off %llu)\n",
-              next_idx, *cur_idx, *cur_offset);
-
-       while (*cur_offset < i_size_read(loghandle->lgh_file->f_dentry->d_inode)) {
-               struct llog_rec_hdr *rec, *last_rec;
-               struct llog_rec_tail *tail;
-               loff_t ppos;
-               int llen;
-
-               llog_skip_over(cur_offset, *cur_idx, next_idx);
-
-               /* read up to next LLOG_CHUNK_SIZE block */
-               ppos = *cur_offset;
-               llen = LLOG_CHUNK_SIZE - (*cur_offset & (LLOG_CHUNK_SIZE - 1));
-               rc = fsfilt_read_record(loghandle->lgh_ctxt->loc_exp->exp_obd,
-                                       loghandle->lgh_file, buf, llen,
-                                       cur_offset);
-               if (rc < 0) {
-                       CERROR("Cant read llog block at log id "DOSTID
-                              "/%u offset %llu\n",
-                              POSTID(&loghandle->lgh_id.lgl_oi),
-                              loghandle->lgh_id.lgl_ogen,
-                              *cur_offset);
-                       return rc;
-               }
-
-               /* put number of bytes read into rc to make code simpler */
-               rc = *cur_offset - ppos;
-               if (rc < len) {
-                       /* signal the end of the valid buffer to llog_process */
-                       memset(buf + rc, 0, len - rc);
-               }
-
-               if (rc == 0) /* end of file, nothing to do */
-                       return 0;
-
-               if (rc < sizeof(*tail)) {
-                       CERROR("Invalid llog block at log id "DOSTID"/%u offset%llu\n",
-                              POSTID(&loghandle->lgh_id.lgl_oi),
-                              loghandle->lgh_id.lgl_ogen, *cur_offset);
-                       return -EINVAL;
-               }
-
-               rec = buf;
-               if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
-                       lustre_swab_llog_rec(rec);
-
-               tail = (struct llog_rec_tail *)(buf + rc -
-                                               sizeof(struct llog_rec_tail));
-
-               /* get the last record in block */
-               last_rec = (struct llog_rec_hdr *)(buf + rc -
-                                                  le32_to_cpu(tail->lrt_len));
-
-               if (LLOG_REC_HDR_NEEDS_SWABBING(last_rec))
-                       lustre_swab_llog_rec(last_rec);
-               LASSERT(last_rec->lrh_index == tail->lrt_index);
-
-               *cur_idx = tail->lrt_index;
-
-               /* this shouldn't happen */
-               if (tail->lrt_index == 0) {
-                       CERROR("Invalid llog tail at log id "DOSTID"/%u offset %llu\n",
-                              POSTID(&loghandle->lgh_id.lgl_oi),
-                              loghandle->lgh_id.lgl_ogen, *cur_offset);
-                       return -EINVAL;
-               }
-               if (tail->lrt_index < next_idx)
-                       continue;
-
-               /* sanity check that the start of the new buffer is no farther
-                * than the record that we wanted.  This shouldn't happen. */
-               if (rec->lrh_index > next_idx) {
-                       CERROR("missed desired record? %u > %u\n",
-                              rec->lrh_index, next_idx);
-                       return -ENOENT;
-               }
-               return 0;
-       }
-       return -EIO;
-}
-
-static int llog_lvfs_prev_block(const struct lu_env *env,
-                               struct llog_handle *loghandle,
-                               int prev_idx, void *buf, int len)
-{
-       __u64 cur_offset;
-       int rc;
-
-       if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
-               return -EINVAL;
-
-       CDEBUG(D_OTHER, "looking for log index %u\n", prev_idx);
-
-       cur_offset = LLOG_CHUNK_SIZE;
-       llog_skip_over(&cur_offset, 0, prev_idx);
-
-       while (cur_offset < i_size_read(loghandle->lgh_file->f_dentry->d_inode)) {
-               struct llog_rec_hdr *rec, *last_rec;
-               struct llog_rec_tail *tail;
-               loff_t ppos = cur_offset;
-
-               rc = fsfilt_read_record(loghandle->lgh_ctxt->loc_exp->exp_obd,
-                                       loghandle->lgh_file, buf, len,
-                                       &cur_offset);
-               if (rc < 0) {
-                       CERROR("Cant read llog block at log id "DOSTID
-                              "/%u offset %llu\n",
-                              POSTID(&loghandle->lgh_id.lgl_oi),
-                              loghandle->lgh_id.lgl_ogen,
-                              cur_offset);
-                       return rc;
-               }
-
-               /* put number of bytes read into rc to make code simpler */
-               rc = cur_offset - ppos;
-
-               if (rc == 0) /* end of file, nothing to do */
-                       return 0;
-
-               if (rc < sizeof(*tail)) {
-                       CERROR("Invalid llog block at log id "DOSTID"/%u offset%llu\n",
-                              POSTID(&loghandle->lgh_id.lgl_oi),
-                              loghandle->lgh_id.lgl_ogen, cur_offset);
-                       return -EINVAL;
-               }
-
-               rec = buf;
-               if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
-                       lustre_swab_llog_rec(rec);
-
-               tail = (struct llog_rec_tail *)(buf + rc -
-                                               sizeof(struct llog_rec_tail));
-
-               /* get the last record in block */
-               last_rec = (struct llog_rec_hdr *)(buf + rc -
-                                                  le32_to_cpu(tail->lrt_len));
-
-               if (LLOG_REC_HDR_NEEDS_SWABBING(last_rec))
-                       lustre_swab_llog_rec(last_rec);
-               LASSERT(last_rec->lrh_index == tail->lrt_index);
-
-               /* this shouldn't happen */
-               if (tail->lrt_index == 0) {
-                       CERROR("Invalid llog tail at log id "DOSTID"/%u offset%llu\n",
-                              POSTID(&loghandle->lgh_id.lgl_oi),
-                              loghandle->lgh_id.lgl_ogen, cur_offset);
-                       return -EINVAL;
-               }
-               if (tail->lrt_index < prev_idx)
-                       continue;
-
-               /* sanity check that the start of the new buffer is no farther
-                * than the record that we wanted.  This shouldn't happen. */
-               if (rec->lrh_index > prev_idx) {
-                       CERROR("missed desired record? %u > %u\n",
-                              rec->lrh_index, prev_idx);
-                       return -ENOENT;
-               }
-               return 0;
-       }
-       return -EIO;
-}
-
-static struct file *llog_filp_open(char *dir, char *name, int flags, int mode)
-{
-       char *logname;
-       struct file *filp;
-       int len;
-
-       OBD_ALLOC(logname, PATH_MAX);
-       if (logname == NULL)
-               return ERR_PTR(-ENOMEM);
-
-       len = snprintf(logname, PATH_MAX, "%s/%s", dir, name);
-       if (len >= PATH_MAX - 1) {
-               filp = ERR_PTR(-ENAMETOOLONG);
-       } else {
-               filp = filp_open(logname, flags, mode);
-               if (IS_ERR(filp) && PTR_ERR(filp) != -ENOENT)
-                       CERROR("logfile creation %s: %ld\n", logname,
-                              PTR_ERR(filp));
-       }
-       OBD_FREE(logname, PATH_MAX);
-       return filp;
-}
-
-static int llog_lvfs_open(const struct lu_env *env,  struct llog_handle *handle,
-                         struct llog_logid *logid, char *name,
-                         enum llog_open_param open_param)
-{
-       struct llog_ctxt        *ctxt = handle->lgh_ctxt;
-       struct dentry           *dchild = NULL;
-       struct obd_device       *obd;
-       int                      rc = 0;
-
-       LASSERT(ctxt);
-       LASSERT(ctxt->loc_exp);
-       LASSERT(ctxt->loc_exp->exp_obd);
-       obd = ctxt->loc_exp->exp_obd;
-
-       LASSERT(handle);
-       if (logid != NULL) {
-               dchild = obd_lvfs_fid2dentry(ctxt->loc_exp, &logid->lgl_oi,
-                                            logid->lgl_ogen);
-               if (IS_ERR(dchild)) {
-                       rc = PTR_ERR(dchild);
-                       CERROR("%s: error looking up logfile #"DOSTID "#%08x:"
-                              " rc = %d\n", ctxt->loc_obd->obd_name,
-                              POSTID(&logid->lgl_oi), logid->lgl_ogen, rc);
-                       GOTO(out, rc);
-               }
-               if (dchild->d_inode == NULL) {
-                       l_dput(dchild);
-                       rc = -ENOENT;
-                       CERROR("%s: nonexistent llog #"DOSTID"#%08x:"
-                              "rc = %d\n", ctxt->loc_obd->obd_name,
-                              POSTID(&logid->lgl_oi), logid->lgl_ogen, rc);
-                       GOTO(out, rc);
-               }
-               handle->lgh_file = l_dentry_open(&obd->obd_lvfs_ctxt, dchild,
-                                                O_RDWR | O_LARGEFILE);
-               l_dput(dchild);
-               if (IS_ERR(handle->lgh_file)) {
-                       rc = PTR_ERR(handle->lgh_file);
-                       handle->lgh_file = NULL;
-                       CERROR("%s: error opening llog #"DOSTID"#%08x:"
-                              "rc = %d\n", ctxt->loc_obd->obd_name,
-                              POSTID(&logid->lgl_oi), logid->lgl_ogen, rc);
-                       GOTO(out, rc);
-               }
-               handle->lgh_id = *logid;
-       } else if (name) {
-               handle->lgh_file = llog_filp_open(MOUNT_CONFIGS_DIR, name,
-                                                 O_RDWR | O_LARGEFILE, 0644);
-               if (IS_ERR(handle->lgh_file)) {
-                       rc = PTR_ERR(handle->lgh_file);
-                       handle->lgh_file = NULL;
-                       if (rc == -ENOENT && open_param == LLOG_OPEN_NEW) {
-                               OBD_ALLOC(handle->lgh_name, strlen(name) + 1);
-                               if (handle->lgh_name)
-                                       strcpy(handle->lgh_name, name);
-                               else
-                                       GOTO(out, rc = -ENOMEM);
-                               rc = 0;
-                       } else {
-                               GOTO(out, rc);
-                       }
-               } else {
-                       lustre_build_llog_lvfs_oid(&handle->lgh_id,
-                           handle->lgh_file->f_dentry->d_inode->i_ino,
-                           handle->lgh_file->f_dentry->d_inode->i_generation);
-               }
-       } else {
-               LASSERTF(open_param == LLOG_OPEN_NEW, "%#x\n", open_param);
-               handle->lgh_file = NULL;
-       }
-
-       /* No new llog is expected but doesn't exist */
-       if (open_param != LLOG_OPEN_NEW && handle->lgh_file == NULL)
-               GOTO(out_name, rc = -ENOENT);
-
-       return 0;
-out_name:
-       if (handle->lgh_name != NULL)
-               OBD_FREE(handle->lgh_name, strlen(name) + 1);
-out:
-       return rc;
-}
-
-static int llog_lvfs_exist(struct llog_handle *handle)
-{
-       return (handle->lgh_file != NULL);
-}
-
-/* This is a callback from the llog_* functions.
- * Assumes caller has already pushed us into the kernel context. */
-static int llog_lvfs_create(const struct lu_env *env,
-                           struct llog_handle *handle,
-                           struct thandle *th)
-{
-       struct llog_ctxt        *ctxt = handle->lgh_ctxt;
-       struct obd_device       *obd;
-       struct dentry           *dchild = NULL;
-       struct file             *file;
-       struct obdo             *oa = NULL;
-       int                      rc = 0;
-       int                      open_flags = O_RDWR | O_CREAT | O_LARGEFILE;
-
-       LASSERT(ctxt);
-       LASSERT(ctxt->loc_exp);
-       obd = ctxt->loc_exp->exp_obd;
-       LASSERT(handle->lgh_file == NULL);
-
-       if (handle->lgh_name) {
-               file = llog_filp_open(MOUNT_CONFIGS_DIR, handle->lgh_name,
-                                     open_flags, 0644);
-               if (IS_ERR(file))
-                       return PTR_ERR(file);
-
-               lustre_build_llog_lvfs_oid(&handle->lgh_id,
-                               file->f_dentry->d_inode->i_ino,
-                               file->f_dentry->d_inode->i_generation);
-               handle->lgh_file = file;
-       } else {
-               OBDO_ALLOC(oa);
-               if (oa == NULL)
-                       return -ENOMEM;
-
-               ostid_set_seq_llog(&oa->o_oi);
-               oa->o_valid = OBD_MD_FLGENER | OBD_MD_FLGROUP;
-
-               rc = obd_create(NULL, ctxt->loc_exp, oa, NULL, NULL);
-               if (rc)
-                       GOTO(out, rc);
-
-               /* FIXME: rationalize the misuse of o_generation in
-                *      this API along with mds_obd_{create,destroy}.
-                *      Hopefully it is only an internal API issue. */
-#define o_generation o_parent_oid
-               dchild = obd_lvfs_fid2dentry(ctxt->loc_exp, &oa->o_oi,
-                                            oa->o_generation);
-               if (IS_ERR(dchild))
-                       GOTO(out, rc = PTR_ERR(dchild));
-
-               file = l_dentry_open(&obd->obd_lvfs_ctxt, dchild, open_flags);
-               l_dput(dchild);
-               if (IS_ERR(file))
-                       GOTO(out, rc = PTR_ERR(file));
-               handle->lgh_id.lgl_oi = oa->o_oi;
-               handle->lgh_id.lgl_ogen = oa->o_generation;
-               handle->lgh_file = file;
-out:
-               OBDO_FREE(oa);
-       }
-       return rc;
-}
-
-static int llog_lvfs_close(const struct lu_env *env,
-                          struct llog_handle *handle)
-{
-       int rc;
-
-       if (handle->lgh_file == NULL)
-               return 0;
-       rc = filp_close(handle->lgh_file, 0);
-       if (rc)
-               CERROR("%s: error closing llog #"DOSTID"#%08x: "
-                      "rc = %d\n", handle->lgh_ctxt->loc_obd->obd_name,
-                      POSTID(&handle->lgh_id.lgl_oi),
-                      handle->lgh_id.lgl_ogen, rc);
-       handle->lgh_file = NULL;
-       if (handle->lgh_name) {
-               OBD_FREE(handle->lgh_name, strlen(handle->lgh_name) + 1);
-               handle->lgh_name = NULL;
-       }
-       return rc;
-}
-
-static int llog_lvfs_destroy(const struct lu_env *env,
-                            struct llog_handle *handle)
-{
-       struct dentry *fdentry;
-       struct obdo *oa;
-       struct obd_device *obd = handle->lgh_ctxt->loc_exp->exp_obd;
-       char *dir;
-       void *th;
-       struct inode *inode;
-       int rc, rc1;
-
-       dir = MOUNT_CONFIGS_DIR;
-
-       LASSERT(handle->lgh_file);
-       fdentry = handle->lgh_file->f_dentry;
-       inode = fdentry->d_parent->d_inode;
-       if (strcmp(fdentry->d_parent->d_name.name, dir) == 0) {
-               struct lvfs_run_ctxt saved;
-               struct vfsmount *mnt = mntget(handle->lgh_file->f_vfsmnt);
-
-               push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
-               dget(fdentry);
-               rc = llog_lvfs_close(env, handle);
-               if (rc == 0) {
-                       mutex_lock_nested(&inode->i_mutex, I_MUTEX_PARENT);
-                       rc = ll_vfs_unlink(inode, fdentry, mnt);
-                       mutex_unlock(&inode->i_mutex);
-               }
-               mntput(mnt);
-
-               dput(fdentry);
-               pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
-               return rc;
-       }
-
-       OBDO_ALLOC(oa);
-       if (oa == NULL)
-               return -ENOMEM;
-
-       oa->o_oi = handle->lgh_id.lgl_oi;
-       oa->o_generation = handle->lgh_id.lgl_ogen;
-#undef o_generation
-       oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP | OBD_MD_FLGENER;
-
-       rc = llog_lvfs_close(env, handle);
-       if (rc)
-               GOTO(out, rc);
-
-       th = fsfilt_start_log(obd, inode, FSFILT_OP_UNLINK, NULL, 1);
-       if (IS_ERR(th)) {
-               CERROR("fsfilt_start failed: %ld\n", PTR_ERR(th));
-               GOTO(out, rc = PTR_ERR(th));
-       }
-
-       rc = obd_destroy(NULL, handle->lgh_ctxt->loc_exp, oa,
-                        NULL, NULL, NULL, NULL);
-
-       rc1 = fsfilt_commit(obd, inode, th, 0);
-       if (rc == 0 && rc1 != 0)
-               rc = rc1;
- out:
-       OBDO_FREE(oa);
-       return rc;
-}
-
-static int llog_lvfs_declare_create(const struct lu_env *env,
-                                   struct llog_handle *res,
-                                   struct thandle *th)
-{
-       return 0;
-}
-
-static int llog_lvfs_declare_write_rec(const struct lu_env *env,
-                                      struct llog_handle *loghandle,
-                                      struct llog_rec_hdr *rec,
-                                      int idx, struct thandle *th)
-{
-       return 0;
-}
-
-struct llog_operations llog_lvfs_ops = {
-       .lop_write_rec          = llog_lvfs_write_rec,
-       .lop_next_block         = llog_lvfs_next_block,
-       .lop_prev_block         = llog_lvfs_prev_block,
-       .lop_read_header        = llog_lvfs_read_header,
-       .lop_create             = llog_lvfs_create,
-       .lop_destroy            = llog_lvfs_destroy,
-       .lop_close              = llog_lvfs_close,
-       .lop_open               = llog_lvfs_open,
-       .lop_exist              = llog_lvfs_exist,
-       .lop_declare_create     = llog_lvfs_declare_create,
-       .lop_declare_write_rec  = llog_lvfs_declare_write_rec,
-};
-EXPORT_SYMBOL(llog_lvfs_ops);
-#else /* !__KERNEL__ */
-struct llog_operations llog_lvfs_ops = {};
-#endif