-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
- * Copyright (C) 2001-2003 Cluster File Systems, Inc.
- * Author: Andreas Dilger <adilger@clusterfs.com>
- *
- * This file is part of Lustre, http://www.lustre.org.
- *
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
- *
- * Lustre 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 for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * 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
- */
-
-#define DEBUG_SUBSYSTEM S_LOG
-
-#ifndef EXPORT_SYMTAB
-#define EXPORT_SYMTAB
-#endif
-
-#ifdef __KERNEL__
-#include <linux/fs.h>
-#else
-#include <liblustre.h>
-#endif
-
-#include <linux/obd.h>
-#include <linux/obd_class.h>
-#include <linux/lustre_log.h>
-#include <linux/obd_ost.h>
-#include <portals/list.h>
-#include <linux/lvfs.h>
-#include <linux/lustre_fsfilt.h>
-#include "llog_internal.h"
-
-#ifdef __KERNEL__
-
-static int llog_lvfs_pad(struct obd_device *obd, struct l_file *file,
- int len, int index)
-{
- struct llog_rec_hdr rec = { 0 };
- struct llog_rec_tail tail;
- int rc;
- ENTRY;
-
- 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 = 0;
-
- 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 l_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;
-
- ENTRY;
- file->f_pos = off;
-
- 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 l_file *file,
- void *buf, int size, loff_t off)
-{
- loff_t offset = off;
- int rc;
- ENTRY;
-
- 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(struct llog_handle *handle)
-{
- struct obd_device *obd;
- int rc;
- ENTRY;
-
- LASSERT(sizeof(*handle->lgh_hdr) == LLOG_CHUNK_SIZE);
-
- obd = handle->lgh_ctxt->loc_exp->exp_obd;
-
- if (handle->lgh_file->f_dentry->d_inode->i_size == 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;
- /*
- * These need to be fixed for bug 1987
- */
- 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 = handle->lgh_file->f_dentry->d_inode->i_size;
-
- 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(struct llog_handle *loghandle,
- struct llog_rec_hdr *rec,
- struct llog_cookie *reccookie, int cookiecount,
- void *buf, int idx)
-{
- 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;
- ENTRY;
-
- 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 (idx != -1) {
- loff_t saved_offset;
-
- /* no header: only allowed to insert record 1 */
- if (idx != 1 && !file->f_dentry->d_inode->i_size) {
- CERROR("idx != -1 in empty log\n");
- LBUG();
- }
-
- if (idx && llh->llh_size && llh->llh_size != reclen)
- RETURN(-EINVAL);
-
- 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);
-
- saved_offset = sizeof(*llh) + (idx-1)*rec->lrh_len;
- 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));
- if (buf)
- reclen = sizeof(*rec) + rec->lrh_len +
- sizeof(struct llog_rec_tail);
-
- /* NOTE: padding is a record, but no bit is set */
- if (left != 0 && left != reclen &&
- left < (reclen + LLOG_MIN_REC_SIZE)) {
- int bitmap_size = sizeof(llh->llh_bitmap) * 8;
- loghandle->lgh_last_idx++;
- rc = llog_lvfs_pad(obd, file, left, loghandle->lgh_last_idx);
- if (rc)
- RETURN(rc);
- /* if it's the last idx in log file, then return -ENOSPC */
- if (loghandle->lgh_last_idx == bitmap_size - 1)
- RETURN(-ENOSPC);
- }
-
- loghandle->lgh_last_idx++;
- index = loghandle->lgh_last_idx;
- 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;
- }
- if (ext2_set_bit(index, llh->llh_bitmap)) {
- CERROR("argh, index %u already set in log bitmap?\n", index);
- LBUG(); /* should never happen */
- }
- llh->llh_count++;
- 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_HA, "added record "LPX64": idx: %u, %u bytes\n",
- loghandle->lgh_id.lgl_oid, 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)
- reccookie->lgc_subsys = LLOG_UNLINK_ORIG_CTXT;
- else if (rec->lrh_type == OST_SZ_REC)
- reccookie->lgc_subsys = LLOG_SIZE_ORIG_CTXT;
- else if (rec->lrh_type == OST_RAID1_REC)
- reccookie->lgc_subsys = LLOG_RD1_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 preceeding cur_offset
- * returns -EIO/-EINVAL on error
- */
-static int llog_lvfs_next_block(struct llog_handle *loghandle, int *cur_idx,
- int next_idx, __u64 *cur_offset, void *buf,
- int len)
-{
- int rc;
- ENTRY;
-
- if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
- RETURN(-EINVAL);
-
- CDEBUG(D_OTHER, "looking for log index %u (cur idx %u off "LPU64")\n",
- next_idx, *cur_idx, *cur_offset);
-
- while (*cur_offset < loghandle->lgh_file->f_dentry->d_inode->i_size) {
- struct llog_rec_hdr *rec;
- struct llog_rec_tail *tail;
- loff_t ppos;
-
- llog_skip_over(cur_offset, *cur_idx, next_idx);
-
- ppos = *cur_offset;
- rc = fsfilt_read_record(loghandle->lgh_ctxt->loc_exp->exp_obd,
- loghandle->lgh_file, buf, len,
- &ppos);
-
- if (rc) {
- CERROR("Cant read llog block at log id "LPU64
- "/%u offset "LPU64"\n",
- loghandle->lgh_id.lgl_oid,
- loghandle->lgh_id.lgl_ogen,
- *cur_offset);
- RETURN(rc);
- }
-
- /* put number of bytes read into rc to make code simpler */
- rc = ppos - *cur_offset;
- *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 "LPU64"/%u offset "
- LPU64"\n", loghandle->lgh_id.lgl_oid,
- loghandle->lgh_id.lgl_ogen, *cur_offset);
- RETURN(-EINVAL);
- }
-
- tail = buf + rc - sizeof(struct llog_rec_tail);
- *cur_idx = tail->lrt_index;
-
- /* this shouldn't happen */
- if (tail->lrt_index == 0) {
- CERROR("Invalid llog tail at log id "LPU64"/%u offset "
- LPU64"\n", loghandle->lgh_id.lgl_oid,
- 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. */
- rec = buf;
- 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 struct file *llog_filp_open(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, "LOGS/%s", name);
- if (len >= PATH_MAX - 1) {
- filp = ERR_PTR(-ENAMETOOLONG);
- } else {
- filp = l_filp_open(logname, flags, mode);
- if (IS_ERR(filp))
- CERROR("logfile creation %s: %ld\n", logname,
- PTR_ERR(filp));
- }
-
- OBD_FREE(logname, PATH_MAX);
- return filp;
-}
-
-/* This is a callback from the llog_* functions.
- * Assumes caller has already pushed us into the kernel context. */
-static int llog_lvfs_create(struct llog_ctxt *ctxt, struct llog_handle **res,
- struct llog_logid *logid, char *name)
-{
- struct llog_handle *handle;
- struct obd_device *obd;
- struct l_dentry *dchild = NULL;
- struct obdo *oa = NULL;
- int rc = 0, cleanup_phase = 1;
- int open_flags = O_RDWR | O_CREAT | O_LARGEFILE;
- ENTRY;
-
- handle = llog_alloc_handle();
- if (handle == NULL)
- RETURN(-ENOMEM);
- *res = handle;
-
- LASSERT(ctxt);
- LASSERT(ctxt->loc_exp);
- obd = ctxt->loc_exp->exp_obd;
-
- if (logid != NULL) {
- dchild = obd_lvfs_fid2dentry(ctxt->loc_exp, logid->lgl_oid,
- logid->lgl_ogen, logid->lgl_ogr);
-
- if (IS_ERR(dchild)) {
- rc = PTR_ERR(dchild);
- CERROR("error looking up logfile "LPX64":0x%x: rc %d\n",
- logid->lgl_oid, logid->lgl_ogen, rc);
- GOTO(cleanup, rc);
- }
-
- cleanup_phase = 2;
- if (dchild->d_inode == NULL) {
- rc = -ENOENT;
- CERROR("nonexistent log file "LPX64":"LPX64": rc %d\n",
- logid->lgl_oid, logid->lgl_ogr, rc);
- GOTO(cleanup, rc);
- }
-
- handle->lgh_file = l_dentry_open(&obd->obd_ctxt, dchild,
- O_RDWR | O_LARGEFILE);
- if (IS_ERR(handle->lgh_file)) {
- rc = PTR_ERR(handle->lgh_file);
- CERROR("error opening logfile "LPX64"0x%x: rc %d\n",
- logid->lgl_oid, logid->lgl_ogen, rc);
- GOTO(cleanup, rc);
- }
-
- /* assign the value of lgh_id for handle directly */
- handle->lgh_id = *logid;
-
- } else if (name) {
- handle->lgh_file = llog_filp_open(name, open_flags, 0644);
- if (IS_ERR(handle->lgh_file))
- GOTO(cleanup, rc = PTR_ERR(handle->lgh_file));
-
- handle->lgh_id.lgl_ogr = 1;
- handle->lgh_id.lgl_oid =
- handle->lgh_file->f_dentry->d_inode->i_ino;
- handle->lgh_id.lgl_ogen =
- handle->lgh_file->f_dentry->d_inode->i_generation;
- } else {
- oa = obdo_alloc();
- if (oa == NULL)
- GOTO(cleanup, rc = -ENOMEM);
- /* XXX get some filter group constants */
- oa->o_gr = 1;
- oa->o_valid = OBD_MD_FLGENER | OBD_MD_FLGROUP;
- rc = obd_create(ctxt->loc_exp, oa, NULL, NULL);
- if (rc)
- GOTO(cleanup, rc);
-
- dchild = obd_lvfs_fid2dentry(ctxt->loc_exp, oa->o_id,
- oa->o_generation, oa->o_gr);
-
- if (IS_ERR(dchild))
- GOTO(cleanup, rc = PTR_ERR(dchild));
- cleanup_phase = 2;
- handle->lgh_file = l_dentry_open(&obd->obd_ctxt, dchild,
- open_flags);
- if (IS_ERR(handle->lgh_file))
- GOTO(cleanup, rc = PTR_ERR(handle->lgh_file));
-
- handle->lgh_id.lgl_ogr = oa->o_gr;
- handle->lgh_id.lgl_oid = oa->o_id;
- handle->lgh_id.lgl_ogen = oa->o_generation;
- }
-
- handle->lgh_ctxt = ctxt;
- finish:
- if (oa)
- obdo_free(oa);
- RETURN(rc);
-cleanup:
- switch (cleanup_phase) {
- case 2:
- l_dput(dchild);
- case 1:
- llog_free_handle(handle);
- }
- goto finish;
-}
-
-static int llog_lvfs_close(struct llog_handle *handle)
-{
- int rc;
- ENTRY;
-
- rc = filp_close(handle->lgh_file, 0);
- if (rc)
- CERROR("error closing log: rc %d\n", rc);
- RETURN(rc);
-}
-
-static int llog_lvfs_destroy(struct llog_handle *handle)
-{
- struct dentry *fdentry;
- struct obdo *oa;
- int rc;
- ENTRY;
-
- fdentry = handle->lgh_file->f_dentry;
- if (!strcmp(fdentry->d_parent->d_name.name, "LOGS")) {
- struct obd_device *obd = handle->lgh_ctxt->loc_exp->exp_obd;
- struct inode *inode = fdentry->d_parent->d_inode;
- struct obd_run_ctxt saved;
-
- push_ctxt(&saved, &obd->obd_ctxt, NULL);
- dget(fdentry);
- rc = llog_lvfs_close(handle);
-
- if (rc == 0) {
- down(&inode->i_sem);
- rc = vfs_unlink(inode, fdentry);
- up(&inode->i_sem);
- }
-
- dput(fdentry);
- pop_ctxt(&saved, &obd->obd_ctxt, NULL);
- RETURN(rc);
- }
-
- oa = obdo_alloc();
- if (oa == NULL)
- RETURN(-ENOMEM);
-
- oa->o_id = handle->lgh_id.lgl_oid;
- oa->o_gr = handle->lgh_id.lgl_ogr;
- oa->o_generation = handle->lgh_id.lgl_ogen;
- oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP | OBD_MD_FLGENER;
-
- rc = llog_lvfs_close(handle);
- if (rc)
- GOTO(out, rc);
-
- rc = obd_destroy(handle->lgh_ctxt->loc_exp, oa, NULL, NULL);
- out:
- obdo_free(oa);
- RETURN(rc);
-}
-
-/* reads the catalog list */
-int llog_get_cat_list(struct obd_device *obd, struct obd_device *disk_obd,
- char *name, int count, struct llog_catid *idarray)
-{
- struct obd_run_ctxt saved;
- struct l_file *file;
- int rc;
- int size = sizeof(*idarray) * count;
- loff_t off = 0;
-
- LASSERT(count);
-
- push_ctxt(&saved, &obd->obd_ctxt, NULL);
- file = filp_open(name, O_RDWR | O_CREAT | O_LARGEFILE, 0700);
- if (!file || IS_ERR(file)) {
- rc = PTR_ERR(file);
- CERROR("OBD filter: cannot open/create %s: rc = %d\n",
- name, rc);
- GOTO(out, rc);
- }
-
- if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
- CERROR("%s is not a regular file!: mode = %o\n", name,
- file->f_dentry->d_inode->i_mode);
- GOTO(out, rc = -ENOENT);
- }
-
- rc = fsfilt_read_record(disk_obd, file, idarray, size, &off);
- if (rc) {
- CDEBUG(D_INODE,"OBD filter: error reading %s: rc %d\n",
- name, rc);
- GOTO(out, rc);
- }
-
- out:
- pop_ctxt(&saved, &obd->obd_ctxt, NULL);
- if (file && !IS_ERR(file))
- rc = filp_close(file, 0);
- RETURN(rc);
-}
-EXPORT_SYMBOL(llog_get_cat_list);
-
-/* writes the cat list */
-int llog_put_cat_list(struct obd_device *obd, struct obd_device *disk_obd,
- char *name, int count, struct llog_catid *idarray)
-{
- struct obd_run_ctxt saved;
- struct l_file *file;
- int rc;
- int size = sizeof(*idarray) * count;
- loff_t off = 0;
-
- LASSERT(count);
-
- push_ctxt(&saved, &obd->obd_ctxt, NULL);
- file = filp_open(name, O_RDWR | O_CREAT | O_LARGEFILE, 0700);
- if (!file || IS_ERR(file)) {
- rc = PTR_ERR(file);
- CERROR("OBD filter: cannot open/create %s: rc = %d\n",
- name, rc);
- GOTO(out, rc);
- }
-
- if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
- CERROR("%s is not a regular file!: mode = %o\n", name,
- file->f_dentry->d_inode->i_mode);
- GOTO(out, rc = -ENOENT);
- }
-
- rc = fsfilt_write_record(disk_obd, file, idarray, size, &off, 1);
- if (rc) {
- CDEBUG(D_INODE,"OBD filter: error reading %s: rc %d\n",
- name, rc);
- GOTO(out, rc);
- }
-
- out:
- pop_ctxt(&saved, &obd->obd_ctxt, NULL);
- if (file && !IS_ERR(file))
- rc = filp_close(file, 0);
- RETURN(rc);
-}
-
-struct llog_operations llog_lvfs_ops = {
- lop_write_rec: llog_lvfs_write_rec,
- lop_next_block: llog_lvfs_next_block,
- lop_read_header: llog_lvfs_read_header,
- lop_create: llog_lvfs_create,
- lop_destroy: llog_lvfs_destroy,
- lop_close: llog_lvfs_close,
- // lop_cancel: llog_lvfs_cancel,
-};
-
-EXPORT_SYMBOL(llog_lvfs_ops);
-
-#else /* !__KERNEL__ */
-
-static int llog_lvfs_read_header(struct llog_handle *handle)
-{
- LBUG();
- return 0;
-}
-
-static int llog_lvfs_write_rec(struct llog_handle *loghandle,
- struct llog_rec_hdr *rec,
- struct llog_cookie *reccookie, int cookiecount,
- void *buf, int idx)
-{
- LBUG();
- return 0;
-}
-
-static int llog_lvfs_next_block(struct llog_handle *loghandle, int *cur_idx,
- int next_idx, __u64 *cur_offset, void *buf,
- int len)
-{
- LBUG();
- return 0;
-}
-
-static int llog_lvfs_create(struct llog_ctxt *ctxt, struct llog_handle **res,
- struct llog_logid *logid, char *name)
-{
- LBUG();
- return 0;
-}
-
-static int llog_lvfs_close(struct llog_handle *handle)
-{
- LBUG();
- return 0;
-}
-
-static int llog_lvfs_destroy(struct llog_handle *handle)
-{
- LBUG();
- return 0;
-}
-
-int llog_get_cat_list(struct obd_device *obd, struct obd_device *disk_obd,
- char *name, int count, struct llog_catid *idarray)
-{
- LBUG();
- return 0;
-}
-
-int llog_put_cat_list(struct obd_device *obd, struct obd_device *disk_obd,
- char *name, int count, struct llog_catid *idarray)
-{
- LBUG();
- return 0;
-}
-
-struct llog_operations llog_lvfs_ops = {
- lop_write_rec: llog_lvfs_write_rec,
- lop_next_block: llog_lvfs_next_block,
- lop_read_header: llog_lvfs_read_header,
- lop_create: llog_lvfs_create,
- lop_destroy: llog_lvfs_destroy,
- lop_close: llog_lvfs_close,
-// lop_cancel: llog_lvfs_cancel,
-};
-#endif