[PATCH 16/39] staging/lustre/lvfs: remove llog_lvfs.c and other lvfs code from llog

[Peng Tao <bergwolf@gmail.com>]

From: James Simmons <uja.ornl@gmail.com>

- remove obdfilter/llog_lvfs.c
- remove lgh_file from llog_header

Lustre-change: http://review.whamcloud.com/5331
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-2158
Signed-off-by: Mikhail Pershin <mike.pershin@intel.com>
Signed-off-by: James Simmons <uja.ornl@gmail.com>
Reviewed-by: Keith Mannthey <keith.mannthey@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Peng Tao <bergwolf@gmail.com>
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
---
 .../lustre/lustre/include/linux/lustre_fsfilt.h    |   84 --
 drivers/staging/lustre/lustre/include/linux/lvfs.h |    5 -
 drivers/staging/lustre/lustre/include/lustre_log.h |    4 -
 drivers/staging/lustre/lustre/include/obd_class.h  |   10 -
 drivers/staging/lustre/lustre/lvfs/fsfilt_ext3.c   |  760 ------------------
 drivers/staging/lustre/lustre/obdclass/llog_cat.c  |   34 +-
 drivers/staging/lustre/lustre/obdclass/llog_lvfs.c |  847 --------------------
 7 files changed, 13 insertions(+), 1731 deletions(-)
 delete mode 100644 drivers/staging/lustre/lustre/lvfs/fsfilt_ext3.c
 delete mode 100644 drivers/staging/lustre/lustre/obdclass/llog_lvfs.c

diff --git a/drivers/staging/lustre/lustre/include/linux/lustre_fsfilt.h b/drivers/staging/lustre/lustre/include/linux/lustre_fsfilt.h
index 4da6e372..b250cce 100644
--- a/drivers/staging/lustre/lustre/include/linux/lustre_fsfilt.h
+++ b/drivers/staging/lustre/lustre/include/linux/lustre_fsfilt.h
@@ -49,24 +49,13 @@
 #include <obd.h>
 #include <obd_class.h>
 
-typedef void (*fsfilt_cb_t)(struct obd_device *obd, __u64 last_rcvd,
-			    void *data, int error);
-
 struct fsfilt_operations {
 	struct list_head fs_list;
 	struct module *fs_owner;
 	char   *fs_type;
-	char   *(* fs_getlabel)(struct super_block *sb);
-	void   *(* fs_start)(struct inode *inode, int op, void *desc_private,
-			     int logs);
-	int     (* fs_commit)(struct inode *inode, void *handle,int force_sync);
 	int     (* fs_map_inode_pages)(struct inode *inode, struct page **page,
 				       int pages, unsigned long *blocks,
 				       int create, struct mutex *sem);
-	int     (* fs_write_record)(struct file *, void *, int size, loff_t *,
-				    int force_sync);
-	int     (* fs_read_record)(struct file *, void *, int size, loff_t *);
-	int     (* fs_setup)(struct super_block *sb);
 };
 
 extern int fsfilt_register_ops(struct fsfilt_operations *fs_ops);
@@ -74,20 +63,6 @@ extern void fsfilt_unregister_ops(struct fsfilt_operations *fs_ops);
 extern struct fsfilt_operations *fsfilt_get_ops(const char *type);
 extern void fsfilt_put_ops(struct fsfilt_operations *fs_ops);
 
-static inline char *fsfilt_get_label(struct obd_device *obd,
-				     struct super_block *sb)
-{
-	if (obd->obd_fsops->fs_getlabel == NULL)
-		return NULL;
-	if (obd->obd_fsops->fs_getlabel(sb)[0] == '\0')
-		return NULL;
-
-	return obd->obd_fsops->fs_getlabel(sb);
-}
-
-#define FSFILT_OP_UNLINK		1
-#define FSFILT_OP_CANCEL_UNLINK	 10
-
 #define __fsfilt_check_slow(obd, start, msg)			      \
 do {								      \
 	if (cfs_time_before(jiffies, start + 15 * HZ))		\
@@ -109,63 +84,4 @@ do {						    \
 	start = jiffies;				\
 } while (0)
 
-static inline void *fsfilt_start_log(struct obd_device *obd,
-				     struct inode *inode, int op,
-				     struct obd_trans_info *oti, int logs)
-{
-	unsigned long now = jiffies;
-	void *parent_handle = oti ? oti->oti_handle : NULL;
-	void *handle;
-
-	handle = obd->obd_fsops->fs_start(inode, op, parent_handle, logs);
-	CDEBUG(D_INFO, "started handle %p (%p)\n", handle, parent_handle);
-
-	if (oti != NULL) {
-		if (parent_handle == NULL) {
-			oti->oti_handle = handle;
-		} else if (handle != parent_handle) {
-			CERROR("mismatch: parent %p, handle %p, oti %p\n",
-			       parent_handle, handle, oti);
-			LBUG();
-		}
-	}
-	fsfilt_check_slow(obd, now, "journal start");
-	return handle;
-}
-
-static inline int fsfilt_commit(struct obd_device *obd, struct inode *inode,
-				void *handle, int force_sync)
-{
-	unsigned long now = jiffies;
-	int rc = obd->obd_fsops->fs_commit(inode, handle, force_sync);
-	CDEBUG(D_INFO, "committing handle %p\n", handle);
-
-	fsfilt_check_slow(obd, now, "journal start");
-
-	return rc;
-}
-
-static inline int fsfilt_read_record(struct obd_device *obd, struct file *file,
-				     void *buf, loff_t size, loff_t *offs)
-{
-	return obd->obd_fsops->fs_read_record(file, buf, size, offs);
-}
-
-static inline int fsfilt_write_record(struct obd_device *obd, struct file *file,
-				      void *buf, loff_t size, loff_t *offs,
-				      int force_sync)
-{
-	return obd->obd_fsops->fs_write_record(file, buf, size,offs,force_sync);
-}
-
-static inline int fsfilt_setup(struct obd_device *obd, struct super_block *fs)
-{
-	if (obd->obd_fsops->fs_setup)
-		return obd->obd_fsops->fs_setup(fs);
-	return 0;
-}
-
-
-
-
 #endif
diff --git a/drivers/staging/lustre/lustre/include/linux/lvfs.h b/drivers/staging/lustre/lustre/include/linux/lvfs.h
index e61f1b8..2080508 100644
--- a/drivers/staging/lustre/lustre/include/linux/lvfs.h
+++ b/drivers/staging/lustre/lustre/include/linux/lvfs.h
@@ -64,10 +64,6 @@ struct lvfs_ucred {
 	struct md_identity     *luc_identity;
 };
 
-struct lvfs_callback_ops {
-	struct dentry *(*l_fid2dentry)(__u64 id_ino, __u32 gen, __u64 gr, void *data);
-};
-
 #define OBD_RUN_CTXT_MAGIC      0xC0FFEEAA
 #define OBD_CTXT_DEBUG	  /* development-only debugging */
 struct lvfs_run_ctxt {
@@ -76,7 +72,6 @@ struct lvfs_run_ctxt {
 	mm_segment_t	     fs;
 	struct lvfs_ucred	luc;
 	int		      ngroups;
-	struct lvfs_callback_ops cb_ops;
 	struct group_info       *group_info;
 	struct dt_device	*dt;
 #ifdef OBD_CTXT_DEBUG
diff --git a/drivers/staging/lustre/lustre/include/lustre_log.h b/drivers/staging/lustre/lustre/include/lustre_log.h
index 896c757..d45a27f 100644
--- a/drivers/staging/lustre/lustre/include/lustre_log.h
+++ b/drivers/staging/lustre/lustre/include/lustre_log.h
@@ -309,7 +309,6 @@ struct llog_handle {
 	spinlock_t		 lgh_hdr_lock; /* protect lgh_hdr data */
 	struct llog_logid	 lgh_id; /* id of this log */
 	struct llog_log_hdr	*lgh_hdr;
-	struct file		*lgh_file;
 	struct dt_object	*lgh_obj;
 	int			 lgh_last_idx;
 	int			 lgh_cur_idx; /* used during llog_process */
@@ -325,9 +324,6 @@ 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/include/obd_class.h b/drivers/staging/lustre/lustre/include/obd_class.h
index 1c2ba19..8cb7cdf 100644
--- a/drivers/staging/lustre/lustre/include/obd_class.h
+++ b/drivers/staging/lustre/lustre/include/obd_class.h
@@ -1141,16 +1141,6 @@ static inline int obd_extent_calc(struct obd_export *exp,
 	return rc;
 }
 
-static inline struct dentry *
-obd_lvfs_fid2dentry(struct obd_export *exp, struct ost_id *oi, __u32 gen)
-{
-	struct lvfs_run_ctxt *ctxt = &exp->exp_obd->obd_lvfs_ctxt;
-	LASSERT(exp->exp_obd);
-
-	return ctxt->cb_ops.l_fid2dentry(ostid_id(oi), gen, ostid_seq(oi),
-					 exp->exp_obd);
-}
-
 /* @max_age is the oldest time in jiffies that we accept using a cached data.
  * If the cache is older than @max_age we will get a new value from the
  * target.  Use a value of "cfs_time_current() + HZ" to guarantee freshness. */
diff --git a/drivers/staging/lustre/lustre/lvfs/fsfilt_ext3.c b/drivers/staging/lustre/lustre/lvfs/fsfilt_ext3.c
deleted file mode 100644
index ee75994..0000000
--- a/drivers/staging/lustre/lustre/lvfs/fsfilt_ext3.c
+++ /dev/null
@@ -1,760 +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) 2002, 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/lvfs/fsfilt_ext3.c
- *
- * Author: Andreas Dilger <adilger@clusterfs.com>
- */
-
-#define DEBUG_SUBSYSTEM S_FILTER
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/slab.h>
-#include <linux/pagemap.h>
-#include <ldiskfs/ldiskfs_config.h>
-#include <ext4/ext4.h>
-#include <ext4/ext4_jbd2.h>
-#include <linux/bitops.h>
-#include <linux/quota.h>
-
-#include <linux/libcfs/libcfs.h>
-#include <lustre_fsfilt.h>
-#include <obd.h>
-#include <linux/lustre_compat25.h>
-#include <linux/lprocfs_status.h>
-
-#include <ext4/ext4_extents.h>
-
-#ifdef HAVE_EXT_PBLOCK /* Name changed to ext4_ext_pblock for kernel 2.6.35 */
-#define ext3_ext_pblock(ex) ext_pblock((ex))
-#endif
-
-/* for kernels 2.6.18 and later */
-#define FSFILT_SINGLEDATA_TRANS_BLOCKS(sb) EXT3_SINGLEDATA_TRANS_BLOCKS(sb)
-
-#define fsfilt_ext3_ext_insert_extent(handle, inode, path, newext, flag) \
-	       ext3_ext_insert_extent(handle, inode, path, newext, flag)
-
-#define ext3_mb_discard_inode_preallocations(inode) \
-		 ext3_discard_preallocations(inode)
-
-#define fsfilt_log_start_commit(journal, tid) jbd2_log_start_commit(journal, tid)
-#define fsfilt_log_wait_commit(journal, tid) jbd2_log_wait_commit(journal, tid)
-
-static struct kmem_cache *fcb_cache;
-
-struct fsfilt_cb_data {
-	struct ext4_journal_cb_entry cb_jcb; /* private data - MUST BE FIRST */
-	fsfilt_cb_t cb_func;	    /* MDS/OBD completion function */
-	struct obd_device *cb_obd;      /* MDS/OBD completion device */
-	__u64 cb_last_rcvd;	     /* MDS/OST last committed operation */
-	void *cb_data;		  /* MDS/OST completion function data */
-};
-
-static char *fsfilt_ext3_get_label(struct super_block *sb)
-{
-	return EXT3_SB(sb)->s_es->s_volume_name;
-}
-
-/* kernel has ext4_blocks_for_truncate since linux-3.1.1 */
-# include <ext4/truncate.h>
-
-/*
- * We don't currently need any additional blocks for rmdir and
- * unlink transactions because we are storing the OST oa_id inside
- * the inode (which we will be changing anyways as part of this
- * transaction).
- */
-static void *fsfilt_ext3_start(struct inode *inode, int op, void *desc_private,
-			       int logs)
-{
-	/* For updates to the last received file */
-	int nblocks = FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb);
-	journal_t *journal;
-	void *handle;
-
-	if (current->journal_info) {
-		CDEBUG(D_INODE, "increasing refcount on %p\n",
-		       current->journal_info);
-		goto journal_start;
-	}
-
-	switch(op) {
-	case FSFILT_OP_UNLINK:
-		/* delete one file + create/update logs for each stripe */
-		nblocks += EXT3_DELETE_TRANS_BLOCKS(inode->i_sb);
-		nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
-			    FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
-		break;
-	case FSFILT_OP_CANCEL_UNLINK:
-		LASSERT(logs == 1);
-
-		/* blocks for log header bitmap update OR
-		 * blocks for catalog header bitmap update + unlink of logs +
-		 * blocks for delete the inode (include blocks truncating). */
-		nblocks = (LLOG_CHUNK_SIZE >> inode->i_blkbits) +
-			  EXT3_DELETE_TRANS_BLOCKS(inode->i_sb) +
-			  ext4_blocks_for_truncate(inode) + 3;
-		break;
-	default: CERROR("unknown transaction start op %d\n", op);
-		LBUG();
-	}
-
-	LASSERT(current->journal_info == desc_private);
-	journal = EXT3_SB(inode->i_sb)->s_journal;
-	if (nblocks > journal->j_max_transaction_buffers) {
-		CWARN("too many credits %d for op %ux%u using %d instead\n",
-		       nblocks, op, logs, journal->j_max_transaction_buffers);
-		nblocks = journal->j_max_transaction_buffers;
-	}
-
- journal_start:
-	LASSERTF(nblocks > 0, "can't start %d credit transaction\n", nblocks);
-	handle = ext3_journal_start(inode, nblocks);
-
-	if (!IS_ERR(handle))
-		LASSERT(current->journal_info == handle);
-	else
-		CERROR("error starting handle for op %u (%u credits): rc %ld\n",
-		       op, nblocks, PTR_ERR(handle));
-	return handle;
-}
-
-static int fsfilt_ext3_commit(struct inode *inode, void *h, int force_sync)
-{
-	int rc;
-	handle_t *handle = h;
-
-	LASSERT(current->journal_info == handle);
-	if (force_sync)
-		handle->h_sync = 1; /* recovery likes this */
-
-	rc = ext3_journal_stop(handle);
-
-	return rc;
-}
-
-#ifndef EXT3_EXTENTS_FL
-#define EXT3_EXTENTS_FL		 0x00080000 /* Inode uses extents */
-#endif
-
-#ifndef EXT_ASSERT
-#define EXT_ASSERT(cond)  BUG_ON(!(cond))
-#endif
-
-#define EXT_GENERATION(inode)	   (EXT4_I(inode)->i_ext_generation)
-#define ext3_ext_base		   inode
-#define ext3_ext_base2inode(inode)      (inode)
-#define EXT_DEPTH(inode)		ext_depth(inode)
-#define fsfilt_ext3_ext_walk_space(inode, block, num, cb, cbdata) \
-			ext3_ext_walk_space(inode, block, num, cb, cbdata);
-
-struct bpointers {
-	unsigned long *blocks;
-	unsigned long start;
-	int num;
-	int init_num;
-	int create;
-};
-
-static long ext3_ext_find_goal(struct inode *inode, struct ext3_ext_path *path,
-			       unsigned long block, int *aflags)
-{
-	struct ext3_inode_info *ei = EXT3_I(inode);
-	unsigned long bg_start;
-	unsigned long colour;
-	int depth;
-
-	if (path) {
-		struct ext3_extent *ex;
-		depth = path->p_depth;
-
-		/* try to predict block placement */
-		if ((ex = path[depth].p_ext))
-			return ext4_ext_pblock(ex) + (block - le32_to_cpu(ex->ee_block));
-
-		/* it looks index is empty
-		 * try to find starting from index itself */
-		if (path[depth].p_bh)
-			return path[depth].p_bh->b_blocknr;
-	}
-
-	/* OK. use inode's group */
-	bg_start = (ei->i_block_group * EXT3_BLOCKS_PER_GROUP(inode->i_sb)) +
-		le32_to_cpu(EXT3_SB(inode->i_sb)->s_es->s_first_data_block);
-	colour = (current->pid % 16) *
-		(EXT3_BLOCKS_PER_GROUP(inode->i_sb) / 16);
-	return bg_start + colour + block;
-}
-
-#define ll_unmap_underlying_metadata(sb, blocknr) \
-	unmap_underlying_metadata((sb)->s_bdev, blocknr)
-
-#ifndef EXT3_MB_HINT_GROUP_ALLOC
-static unsigned long new_blocks(handle_t *handle, struct ext3_ext_base *base,
-				struct ext3_ext_path *path, unsigned long block,
-				unsigned long *count, int *err)
-{
-	unsigned long pblock, goal;
-	int aflags = 0;
-	struct inode *inode = ext3_ext_base2inode(base);
-
-	goal = ext3_ext_find_goal(inode, path, block, &aflags);
-	aflags |= 2; /* block have been already reserved */
-	pblock = ext3_mb_new_blocks(handle, inode, goal, count, aflags, err);
-	return pblock;
-
-}
-#else
-static unsigned long new_blocks(handle_t *handle, struct ext3_ext_base *base,
-				struct ext3_ext_path *path, unsigned long block,
-				unsigned long *count, int *err)
-{
-	struct inode *inode = ext3_ext_base2inode(base);
-	struct ext3_allocation_request ar;
-	unsigned long pblock;
-	int aflags;
-
-	/* find neighbour allocated blocks */
-	ar.lleft = block;
-	*err = ext3_ext_search_left(base, path, &ar.lleft, &ar.pleft);
-	if (*err)
-		return 0;
-	ar.lright = block;
-	*err = ext3_ext_search_right(base, path, &ar.lright, &ar.pright);
-	if (*err)
-		return 0;
-
-	/* allocate new block */
-	ar.goal = ext3_ext_find_goal(inode, path, block, &aflags);
-	ar.inode = inode;
-	ar.logical = block;
-	ar.len = *count;
-	ar.flags = EXT3_MB_HINT_DATA;
-	pblock = ext3_mb_new_blocks(handle, &ar, err);
-	*count = ar.len;
-	return pblock;
-}
-#endif
-
-static int ext3_ext_new_extent_cb(struct ext3_ext_base *base,
-				  struct ext3_ext_path *path,
-				  struct ext3_ext_cache *cex,
-#ifdef HAVE_EXT_PREPARE_CB_EXTENT
-				   struct ext3_extent *ex,
-#endif
-				  void *cbdata)
-{
-	struct bpointers *bp = cbdata;
-	struct inode *inode = ext3_ext_base2inode(base);
-	struct ext3_extent nex;
-	unsigned long pblock;
-	unsigned long tgen;
-	int err, i;
-	unsigned long count;
-	handle_t *handle;
-
-#ifdef EXT3_EXT_CACHE_EXTENT
-	if (cex->ec_type == EXT3_EXT_CACHE_EXTENT)
-#else
-	if ((cex->ec_len != 0) && (cex->ec_start != 0))
-#endif
-						   {
-		err = EXT_CONTINUE;
-		goto map;
-	}
-
-	if (bp->create == 0) {
-		i = 0;
-		if (cex->ec_block < bp->start)
-			i = bp->start - cex->ec_block;
-		if (i >= cex->ec_len)
-			CERROR("nothing to do?! i = %d, e_num = %u\n",
-					i, cex->ec_len);
-		for (; i < cex->ec_len && bp->num; i++) {
-			*(bp->blocks) = 0;
-			bp->blocks++;
-			bp->num--;
-			bp->start++;
-		}
-
-		return EXT_CONTINUE;
-	}
-
-	tgen = EXT_GENERATION(base);
-	count = ext3_ext_calc_credits_for_insert(base, path);
-
-	handle = ext3_journal_start(inode, count+EXT3_ALLOC_NEEDED+1);
-	if (IS_ERR(handle)) {
-		return PTR_ERR(handle);
-	}
-
-	if (tgen != EXT_GENERATION(base)) {
-		/* the tree has changed. so path can be invalid at moment */
-		ext3_journal_stop(handle);
-		return EXT_REPEAT;
-	}
-
-	/* In 2.6.32 kernel, ext4_ext_walk_space()'s callback func is not
-	 * protected by i_data_sem as whole. so we patch it to store
-	 * generation to path and now verify the tree hasn't changed */
-	down_write((&EXT4_I(inode)->i_data_sem));
-
-	/* validate extent, make sure the extent tree does not changed */
-	if (EXT_GENERATION(base) != path[0].p_generation) {
-		/* cex is invalid, try again */
-		up_write(&EXT4_I(inode)->i_data_sem);
-		ext3_journal_stop(handle);
-		return EXT_REPEAT;
-	}
-
-	count = cex->ec_len;
-	pblock = new_blocks(handle, base, path, cex->ec_block, &count, &err);
-	if (!pblock)
-		goto out;
-	EXT_ASSERT(count <= cex->ec_len);
-
-	/* insert new extent */
-	nex.ee_block = cpu_to_le32(cex->ec_block);
-	ext3_ext_store_pblock(&nex, pblock);
-	nex.ee_len = cpu_to_le16(count);
-	err = fsfilt_ext3_ext_insert_extent(handle, base, path, &nex, 0);
-	if (err) {
-		/* free data blocks we just allocated */
-		/* not a good idea to call discard here directly,
-		 * but otherwise we'd need to call it every free() */
-#ifdef EXT3_MB_HINT_GROUP_ALLOC
-		ext3_mb_discard_inode_preallocations(inode);
-#endif
-#ifdef HAVE_EXT_FREE_BLOCK_WITH_BUFFER_HEAD /* Introduced in 2.6.32-rc7 */
-		ext3_free_blocks(handle, inode, NULL, ext4_ext_pblock(&nex),
-				 cpu_to_le16(nex.ee_len), 0);
-#else
-		ext3_free_blocks(handle, inode, ext4_ext_pblock(&nex),
-				 cpu_to_le16(nex.ee_len), 0);
-#endif
-		goto out;
-	}
-
-	/*
-	 * Putting len of the actual extent we just inserted,
-	 * we are asking ext3_ext_walk_space() to continue
-	 * scaning after that block
-	 */
-	cex->ec_len = le16_to_cpu(nex.ee_len);
-	cex->ec_start = ext4_ext_pblock(&nex);
-	BUG_ON(le16_to_cpu(nex.ee_len) == 0);
-	BUG_ON(le32_to_cpu(nex.ee_block) != cex->ec_block);
-
-out:
-	up_write((&EXT4_I(inode)->i_data_sem));
-	ext3_journal_stop(handle);
-map:
-	if (err >= 0) {
-		/* map blocks */
-		if (bp->num == 0) {
-			CERROR("hmm. why do we find this extent?\n");
-			CERROR("initial space: %lu:%u\n",
-				bp->start, bp->init_num);
-#ifdef EXT3_EXT_CACHE_EXTENT
-			CERROR("current extent: %u/%u/%llu %d\n",
-				cex->ec_block, cex->ec_len,
-				(unsigned long long)cex->ec_start,
-				cex->ec_type);
-#else
-			CERROR("current extent: %u/%u/%llu\n",
-				cex->ec_block, cex->ec_len,
-				(unsigned long long)cex->ec_start);
-#endif
-		}
-		i = 0;
-		if (cex->ec_block < bp->start)
-			i = bp->start - cex->ec_block;
-		if (i >= cex->ec_len)
-			CERROR("nothing to do?! i = %d, e_num = %u\n",
-					i, cex->ec_len);
-		for (; i < cex->ec_len && bp->num; i++) {
-			*(bp->blocks) = cex->ec_start + i;
-#ifdef EXT3_EXT_CACHE_EXTENT
-			if (cex->ec_type != EXT3_EXT_CACHE_EXTENT)
-#else
-			if ((cex->ec_len == 0) || (cex->ec_start == 0))
-#endif
-									{
-				/* unmap any possible underlying metadata from
-				 * the block device mapping.  bug 6998. */
-				ll_unmap_underlying_metadata(inode->i_sb,
-							     *(bp->blocks));
-			}
-			bp->blocks++;
-			bp->num--;
-			bp->start++;
-		}
-	}
-	return err;
-}
-
-int fsfilt_map_nblocks(struct inode *inode, unsigned long block,
-		       unsigned long num, unsigned long *blocks,
-		       int create)
-{
-	struct ext3_ext_base *base = inode;
-	struct bpointers bp;
-	int err;
-
-	CDEBUG(D_OTHER, "blocks %lu-%lu requested for inode %u\n",
-	       block, block + num - 1, (unsigned) inode->i_ino);
-
-	bp.blocks = blocks;
-	bp.start = block;
-	bp.init_num = bp.num = num;
-	bp.create = create;
-
-	err = fsfilt_ext3_ext_walk_space(base, block, num,
-					 ext3_ext_new_extent_cb, &bp);
-	ext3_ext_invalidate_cache(base);
-
-	return err;
-}
-
-int fsfilt_ext3_map_ext_inode_pages(struct inode *inode, struct page **page,
-				    int pages, unsigned long *blocks,
-				    int create)
-{
-	int blocks_per_page = PAGE_CACHE_SIZE >> inode->i_blkbits;
-	int rc = 0, i = 0;
-	struct page *fp = NULL;
-	int clen = 0;
-
-	CDEBUG(D_OTHER, "inode %lu: map %d pages from %lu\n",
-		inode->i_ino, pages, (*page)->index);
-
-	/* pages are sorted already. so, we just have to find
-	 * contig. space and process them properly */
-	while (i < pages) {
-		if (fp == NULL) {
-			/* start new extent */
-			fp = *page++;
-			clen = 1;
-			i++;
-			continue;
-		} else if (fp->index + clen == (*page)->index) {
-			/* continue the extent */
-			page++;
-			clen++;
-			i++;
-			continue;
-		}
-
-		/* process found extent */
-		rc = fsfilt_map_nblocks(inode, fp->index * blocks_per_page,
-					clen * blocks_per_page, blocks,
-					create);
-		if (rc)
-			GOTO(cleanup, rc);
-
-		/* look for next extent */
-		fp = NULL;
-		blocks += blocks_per_page * clen;
-	}
-
-	if (fp)
-		rc = fsfilt_map_nblocks(inode, fp->index * blocks_per_page,
-					clen * blocks_per_page, blocks,
-					create);
-cleanup:
-	return rc;
-}
-
-int fsfilt_ext3_map_bm_inode_pages(struct inode *inode, struct page **page,
-				   int pages, unsigned long *blocks,
-				   int create)
-{
-	int blocks_per_page = PAGE_CACHE_SIZE >> inode->i_blkbits;
-	unsigned long *b;
-	int rc = 0, i;
-
-	for (i = 0, b = blocks; i < pages; i++, page++) {
-		rc = ext3_map_inode_page(inode, *page, b, create);
-		if (rc) {
-			CERROR("ino %lu, blk %lu create %d: rc %d\n",
-			       inode->i_ino, *b, create, rc);
-			break;
-		}
-
-		b += blocks_per_page;
-	}
-	return rc;
-}
-
-int fsfilt_ext3_map_inode_pages(struct inode *inode, struct page **page,
-				int pages, unsigned long *blocks,
-				int create, struct mutex *optional_mutex)
-{
-	int rc;
-
-	if (EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL) {
-		rc = fsfilt_ext3_map_ext_inode_pages(inode, page, pages,
-						     blocks, create);
-		return rc;
-	}
-	if (optional_mutex != NULL)
-		mutex_lock(optional_mutex);
-	rc = fsfilt_ext3_map_bm_inode_pages(inode, page, pages, blocks, create);
-	if (optional_mutex != NULL)
-		mutex_unlock(optional_mutex);
-
-	return rc;
-}
-
-int fsfilt_ext3_read(struct inode *inode, void *buf, int size, loff_t *offs)
-{
-	unsigned long block;
-	struct buffer_head *bh;
-	int err, blocksize, csize, boffs, osize = size;
-
-	/* prevent reading after eof */
-	spin_lock(&inode->i_lock);
-	if (i_size_read(inode) < *offs + size) {
-		size = i_size_read(inode) - *offs;
-		spin_unlock(&inode->i_lock);
-		if (size < 0) {
-			CDEBUG(D_EXT2, "size %llu is too short for read @%llu\n",
-			       i_size_read(inode), *offs);
-			return -EBADR;
-		} else if (size == 0) {
-			return 0;
-		}
-	} else {
-		spin_unlock(&inode->i_lock);
-	}
-
-	blocksize = 1 << inode->i_blkbits;
-
-	while (size > 0) {
-		block = *offs >> inode->i_blkbits;
-		boffs = *offs & (blocksize - 1);
-		csize = min(blocksize - boffs, size);
-		bh = ext3_bread(NULL, inode, block, 0, &err);
-		if (!bh) {
-			CERROR("can't read block: %d\n", err);
-			return err;
-		}
-
-		memcpy(buf, bh->b_data + boffs, csize);
-		brelse(bh);
-
-		*offs += csize;
-		buf += csize;
-		size -= csize;
-	}
-	return osize;
-}
-EXPORT_SYMBOL(fsfilt_ext3_read);
-
-static int fsfilt_ext3_read_record(struct file * file, void *buf,
-				   int size, loff_t *offs)
-{
-	int rc;
-	rc = fsfilt_ext3_read(file->f_dentry->d_inode, buf, size, offs);
-	if (rc > 0)
-		rc = 0;
-	return rc;
-}
-
-int fsfilt_ext3_write_handle(struct inode *inode, void *buf, int bufsize,
-				loff_t *offs, handle_t *handle)
-{
-	struct buffer_head *bh = NULL;
-	loff_t old_size = i_size_read(inode), offset = *offs;
-	loff_t new_size = i_size_read(inode);
-	unsigned long block;
-	int err = 0, blocksize = 1 << inode->i_blkbits, size, boffs;
-
-	while (bufsize > 0) {
-		if (bh != NULL)
-			brelse(bh);
-
-		block = offset >> inode->i_blkbits;
-		boffs = offset & (blocksize - 1);
-		size = min(blocksize - boffs, bufsize);
-		bh = ext3_bread(handle, inode, block, 1, &err);
-		if (!bh) {
-			CERROR("can't read/create block: %d\n", err);
-			break;
-		}
-
-		err = ext3_journal_get_write_access(handle, bh);
-		if (err) {
-			CERROR("journal_get_write_access() returned error %d\n",
-			       err);
-			break;
-		}
-		LASSERT(bh->b_data + boffs + size <= bh->b_data + bh->b_size);
-		memcpy(bh->b_data + boffs, buf, size);
-		err = ext3_journal_dirty_metadata(handle, bh);
-		if (err) {
-			CERROR("journal_dirty_metadata() returned error %d\n",
-			       err);
-			break;
-		}
-		if (offset + size > new_size)
-			new_size = offset + size;
-		offset += size;
-		bufsize -= size;
-		buf += size;
-	}
-	if (bh)
-		brelse(bh);
-
-	/* correct in-core and on-disk sizes */
-	if (new_size > i_size_read(inode)) {
-		spin_lock(&inode->i_lock);
-		if (new_size > i_size_read(inode))
-			i_size_write(inode, new_size);
-		if (i_size_read(inode) > EXT3_I(inode)->i_disksize)
-			EXT3_I(inode)->i_disksize = i_size_read(inode);
-		if (i_size_read(inode) > old_size) {
-			spin_unlock(&inode->i_lock);
-			mark_inode_dirty(inode);
-		} else {
-			spin_unlock(&inode->i_lock);
-		}
-	}
-
-	if (err == 0)
-		*offs = offset;
-	return err;
-}
-EXPORT_SYMBOL(fsfilt_ext3_write_handle);
-
-static int fsfilt_ext3_write_record(struct file *file, void *buf, int bufsize,
-				    loff_t *offs, int force_sync)
-{
-	struct inode *inode = file->f_dentry->d_inode;
-	handle_t *handle;
-	int err, block_count = 0, blocksize;
-
-	/* Determine how many transaction credits are needed */
-	blocksize = 1 << inode->i_blkbits;
-	block_count = (*offs & (blocksize - 1)) + bufsize;
-	block_count = (block_count + blocksize - 1) >> inode->i_blkbits;
-
-	handle = ext3_journal_start(inode,
-			block_count * EXT3_DATA_TRANS_BLOCKS(inode->i_sb) + 2);
-	if (IS_ERR(handle)) {
-		CERROR("can't start transaction for %d blocks (%d bytes)\n",
-		       block_count * EXT3_DATA_TRANS_BLOCKS(inode->i_sb) + 2,
-		       bufsize);
-		return PTR_ERR(handle);
-	}
-
-	err = fsfilt_ext3_write_handle(inode, buf, bufsize, offs, handle);
-
-	if (!err && force_sync)
-		handle->h_sync = 1; /* recovery likes this */
-
-	ext3_journal_stop(handle);
-
-	return err;
-}
-
-static int fsfilt_ext3_setup(struct super_block *sb)
-{
-	if (!EXT3_HAS_COMPAT_FEATURE(sb,
-				EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
-		CERROR("ext3 mounted without journal\n");
-		return -EINVAL;
-	}
-
-#ifdef S_PDIROPS
-	CWARN("Enabling PDIROPS\n");
-	set_opt(EXT3_SB(sb)->s_mount_opt, PDIROPS);
-	sb->s_flags |= S_PDIROPS;
-#endif
-	if (!EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_DIR_INDEX))
-		CWARN("filesystem doesn't have dir_index feature enabled\n");
-	return 0;
-}
-static struct fsfilt_operations fsfilt_ext3_ops = {
-	.fs_type		= "ext3",
-	.fs_owner	       = THIS_MODULE,
-	.fs_getlabel	    = fsfilt_ext3_get_label,
-	.fs_start	       = fsfilt_ext3_start,
-	.fs_commit	      = fsfilt_ext3_commit,
-	.fs_map_inode_pages     = fsfilt_ext3_map_inode_pages,
-	.fs_write_record	= fsfilt_ext3_write_record,
-	.fs_read_record	 = fsfilt_ext3_read_record,
-	.fs_setup	       = fsfilt_ext3_setup,
-};
-
-static int __init fsfilt_ext3_init(void)
-{
-	int rc;
-
-	fcb_cache = kmem_cache_create("fsfilt_ext3_fcb",
-					 sizeof(struct fsfilt_cb_data), 0, 0);
-	if (!fcb_cache) {
-		CERROR("error allocating fsfilt journal callback cache\n");
-		GOTO(out, rc = -ENOMEM);
-	}
-
-	rc = fsfilt_register_ops(&fsfilt_ext3_ops);
-
-	if (rc) {
-		int err = kmem_cache_destroy(fcb_cache);
-		LASSERTF(err == 0, "error destroying new cache: rc %d\n", err);
-	}
-out:
-	return rc;
-}
-
-static void __exit fsfilt_ext3_exit(void)
-{
-	int rc;
-
-	fsfilt_unregister_ops(&fsfilt_ext3_ops);
-	rc = kmem_cache_destroy(fcb_cache);
-	LASSERTF(rc == 0, "couldn't destroy fcb_cache slab\n");
-}
-
-module_init(fsfilt_ext3_init);
-module_exit(fsfilt_ext3_exit);
-
-MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
-MODULE_DESCRIPTION("Lustre ext3 Filesystem Helper v0.1");
-MODULE_LICENSE("GPL");
diff --git a/drivers/staging/lustre/lustre/obdclass/llog_cat.c b/drivers/staging/lustre/lustre/obdclass/llog_cat.c
index c0f3af7..c813a88 100644
--- a/drivers/staging/lustre/lustre/obdclass/llog_cat.c
+++ b/drivers/staging/lustre/lustre/obdclass/llog_cat.c
@@ -444,31 +444,23 @@ int llog_cat_add(const struct lu_env *env, struct llog_handle *cathandle,
 	LASSERT(ctxt);
 	LASSERT(ctxt->loc_exp);
 
-	if (cathandle->lgh_obj != NULL) {
-		dt = ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
-		LASSERT(dt);
+	LASSERT(cathandle->lgh_obj != NULL);
+	dt = lu2dt_dev(cathandle->lgh_obj->do_lu.lo_dev);
 
-		th = dt_trans_create(env, dt);
-		if (IS_ERR(th))
-			return PTR_ERR(th);
+	th = dt_trans_create(env, dt);
+	if (IS_ERR(th))
+		return PTR_ERR(th);
 
-		rc = llog_cat_declare_add_rec(env, cathandle, rec, th);
-		if (rc)
-			GOTO(out_trans, rc);
+	rc = llog_cat_declare_add_rec(env, cathandle, rec, th);
+	if (rc)
+		GOTO(out_trans, rc);
 
-		rc = dt_trans_start_local(env, dt, th);
-		if (rc)
-			GOTO(out_trans, rc);
-		rc = llog_cat_add_rec(env, cathandle, rec, reccookie, buf, th);
+	rc = dt_trans_start_local(env, dt, th);
+	if (rc)
+		GOTO(out_trans, rc);
+	rc = llog_cat_add_rec(env, cathandle, rec, reccookie, buf, th);
 out_trans:
-		dt_trans_stop(env, dt, th);
-	} else { /* lvfs compat code */
-		LASSERT(cathandle->lgh_file != NULL);
-		rc = llog_cat_declare_add_rec(env, cathandle, rec, th);
-		if (rc == 0)
-			rc = llog_cat_add_rec(env, cathandle, rec, reccookie,
-					      buf, th);
-	}
+	dt_trans_stop(env, dt, th);
 	return rc;
 }
 EXPORT_SYMBOL(llog_cat_add);
diff --git a/drivers/staging/lustre/lustre/obdclass/llog_lvfs.c b/drivers/staging/lustre/lustre/obdclass/llog_lvfs.c
deleted file mode 100644
index 5385d8e..0000000
--- a/drivers/staging/lustre/lustre/obdclass/llog_lvfs.c
+++ /dev/null
@@ -1,847 +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 <obd.h>
-#include <obd_class.h>
-#include <lustre_log.h>
-#include <obd_ost.h>
-#include <linux/list.h>
-#include <lvfs.h>
-#include <lustre_fsfilt.h>
-#include <lustre_disk.h>
-#include "llog_internal.h"
-
-#if  defined(LLOG_LVFS)
-
-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;
-
-	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 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;
-
-	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 l_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 preceeding 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 "LPU64")\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 "LPU64"\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"
-			       LPU64"\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 "
-			       LPU64"\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 "LPU64"\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"
-			       LPU64"\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"
-			       LPU64"\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 = l_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 l_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 l_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
-- 
1.7.9.5