Initial import

1 files changed, 1460 insertions, 0 deletions

diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
new file mode 100644
index 000000000..b254416dc
--- /dev/null
+++ b/fs/ocfs2/inode.c
@@ -0,0 +1,1460 @@
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * inode.c
+ *
+ * vfs' aops, fops, dops and iops
+ *
+ * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#include <linux/fs.h>
+#include <linux/types.h>
+#include <linux/highmem.h>
+#include <linux/pagemap.h>
+#include <linux/quotaops.h>
+
+#include <asm/byteorder.h>
+
+#include <cluster/masklog.h>
+
+#include "ocfs2.h"
+
+#include "alloc.h"
+#include "dir.h"
+#include "blockcheck.h"
+#include "dlmglue.h"
+#include "extent_map.h"
+#include "file.h"
+#include "heartbeat.h"
+#include "inode.h"
+#include "journal.h"
+#include "namei.h"
+#include "suballoc.h"
+#include "super.h"
+#include "symlink.h"
+#include "sysfile.h"
+#include "uptodate.h"
+#include "xattr.h"
+#include "refcounttree.h"
+#include "ocfs2_trace.h"
+
+#include "buffer_head_io.h"
+
+struct ocfs2_find_inode_args
+{
+	u64		fi_blkno;
+	unsigned long	fi_ino;
+	unsigned int	fi_flags;
+	unsigned int	fi_sysfile_type;
+};
+
+static struct lock_class_key ocfs2_sysfile_lock_key[NUM_SYSTEM_INODES];
+
+static int ocfs2_read_locked_inode(struct inode *inode,
+				   struct ocfs2_find_inode_args *args);
+static int ocfs2_init_locked_inode(struct inode *inode, void *opaque);
+static int ocfs2_find_actor(struct inode *inode, void *opaque);
+static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
+				    struct inode *inode,
+				    struct buffer_head *fe_bh);
+
+void ocfs2_set_inode_flags(struct inode *inode)
+{
+	unsigned int flags = OCFS2_I(inode)->ip_attr;
+
+	inode->i_flags &= ~(S_IMMUTABLE |
+		S_SYNC | S_APPEND | S_NOATIME | S_DIRSYNC);
+
+	if (flags & OCFS2_IMMUTABLE_FL)
+		inode->i_flags |= S_IMMUTABLE;
+
+	if (flags & OCFS2_SYNC_FL)
+		inode->i_flags |= S_SYNC;
+	if (flags & OCFS2_APPEND_FL)
+		inode->i_flags |= S_APPEND;
+	if (flags & OCFS2_NOATIME_FL)
+		inode->i_flags |= S_NOATIME;
+	if (flags & OCFS2_DIRSYNC_FL)
+		inode->i_flags |= S_DIRSYNC;
+}
+
+/* Propagate flags from i_flags to OCFS2_I(inode)->ip_attr */
+void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi)
+{
+	unsigned int flags = oi->vfs_inode.i_flags;
+
+	oi->ip_attr &= ~(OCFS2_SYNC_FL|OCFS2_APPEND_FL|
+			OCFS2_IMMUTABLE_FL|OCFS2_NOATIME_FL|OCFS2_DIRSYNC_FL);
+	if (flags & S_SYNC)
+		oi->ip_attr |= OCFS2_SYNC_FL;
+	if (flags & S_APPEND)
+		oi->ip_attr |= OCFS2_APPEND_FL;
+	if (flags & S_IMMUTABLE)
+		oi->ip_attr |= OCFS2_IMMUTABLE_FL;
+	if (flags & S_NOATIME)
+		oi->ip_attr |= OCFS2_NOATIME_FL;
+	if (flags & S_DIRSYNC)
+		oi->ip_attr |= OCFS2_DIRSYNC_FL;
+}
+
+struct inode *ocfs2_ilookup(struct super_block *sb, u64 blkno)
+{
+	struct ocfs2_find_inode_args args;
+
+	args.fi_blkno = blkno;
+	args.fi_flags = 0;
+	args.fi_ino = ino_from_blkno(sb, blkno);
+	args.fi_sysfile_type = 0;
+
+	return ilookup5(sb, blkno, ocfs2_find_actor, &args);
+}
+struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, unsigned flags,
+			 int sysfile_type)
+{
+	struct inode *inode = NULL;
+	struct super_block *sb = osb->sb;
+	struct ocfs2_find_inode_args args;
+	journal_t *journal = OCFS2_SB(sb)->journal->j_journal;
+
+	trace_ocfs2_iget_begin((unsigned long long)blkno, flags,
+			       sysfile_type);
+
+	/* Ok. By now we've either got the offsets passed to us by the
+	 * caller, or we just pulled them off the bh. Lets do some
+	 * sanity checks to make sure they're OK. */
+	if (blkno == 0) {
+		inode = ERR_PTR(-EINVAL);
+		mlog_errno(PTR_ERR(inode));
+		goto bail;
+	}
+
+	args.fi_blkno = blkno;
+	args.fi_flags = flags;
+	args.fi_ino = ino_from_blkno(sb, blkno);
+	args.fi_sysfile_type = sysfile_type;
+
+	inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
+			     ocfs2_init_locked_inode, &args);
+	/* inode was *not* in the inode cache. 2.6.x requires
+	 * us to do our own read_inode call and unlock it
+	 * afterwards. */
+	if (inode == NULL) {
+		inode = ERR_PTR(-ENOMEM);
+		mlog_errno(PTR_ERR(inode));
+		goto bail;
+	}
+	trace_ocfs2_iget5_locked(inode->i_state);
+	if (inode->i_state & I_NEW) {
+		ocfs2_read_locked_inode(inode, &args);
+		unlock_new_inode(inode);
+	}
+	if (is_bad_inode(inode)) {
+		iput(inode);
+		inode = ERR_PTR(-ESTALE);
+		goto bail;
+	}
+
+	/*
+	 * Set transaction id's of transactions that have to be committed
+	 * to finish f[data]sync. We set them to currently running transaction
+	 * as we cannot be sure that the inode or some of its metadata isn't
+	 * part of the transaction - the inode could have been reclaimed and
+	 * now it is reread from disk.
+	 */
+	if (journal) {
+		transaction_t *transaction;
+		tid_t tid;
+		struct ocfs2_inode_info *oi = OCFS2_I(inode);
+
+		read_lock(&journal->j_state_lock);
+		if (journal->j_running_transaction)
+			transaction = journal->j_running_transaction;
+		else
+			transaction = journal->j_committing_transaction;
+		if (transaction)
+			tid = transaction->t_tid;
+		else
+			tid = journal->j_commit_sequence;
+		read_unlock(&journal->j_state_lock);
+		oi->i_sync_tid = tid;
+		oi->i_datasync_tid = tid;
+	}
+
+bail:
+	if (!IS_ERR(inode)) {
+		trace_ocfs2_iget_end(inode, 
+			(unsigned long long)OCFS2_I(inode)->ip_blkno);
+	}
+
+	return inode;
+}
+
+
+/*
+ * here's how inodes get read from disk:
+ * iget5_locked -> find_actor -> OCFS2_FIND_ACTOR
+ * found? : return the in-memory inode
+ * not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE
+ */
+
+static int ocfs2_find_actor(struct inode *inode, void *opaque)
+{
+	struct ocfs2_find_inode_args *args = NULL;
+	struct ocfs2_inode_info *oi = OCFS2_I(inode);
+	int ret = 0;
+
+	args = opaque;
+
+	mlog_bug_on_msg(!inode, "No inode in find actor!\n");
+
+	trace_ocfs2_find_actor(inode, inode->i_ino, opaque, args->fi_blkno);
+
+	if (oi->ip_blkno != args->fi_blkno)
+		goto bail;
+
+	ret = 1;
+bail:
+	return ret;
+}
+
+/*
+ * initialize the new inode, but don't do anything that would cause
+ * us to sleep.
+ * return 0 on success, 1 on failure
+ */
+static int ocfs2_init_locked_inode(struct inode *inode, void *opaque)
+{
+	struct ocfs2_find_inode_args *args = opaque;
+	static struct lock_class_key ocfs2_quota_ip_alloc_sem_key,
+				     ocfs2_file_ip_alloc_sem_key;
+
+	inode->i_ino = args->fi_ino;
+	OCFS2_I(inode)->ip_blkno = args->fi_blkno;
+	if (args->fi_sysfile_type != 0)
+		lockdep_set_class(&inode->i_mutex,
+			&ocfs2_sysfile_lock_key[args->fi_sysfile_type]);
+	if (args->fi_sysfile_type == USER_QUOTA_SYSTEM_INODE ||
+	    args->fi_sysfile_type == GROUP_QUOTA_SYSTEM_INODE ||
+	    args->fi_sysfile_type == LOCAL_USER_QUOTA_SYSTEM_INODE ||
+	    args->fi_sysfile_type == LOCAL_GROUP_QUOTA_SYSTEM_INODE)
+		lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem,
+				  &ocfs2_quota_ip_alloc_sem_key);
+	else
+		lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem,
+				  &ocfs2_file_ip_alloc_sem_key);
+
+	return 0;
+}
+
+void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
+			  int create_ino)
+{
+	struct super_block *sb;
+	struct ocfs2_super *osb;
+	int use_plocks = 1;
+
+	sb = inode->i_sb;
+	osb = OCFS2_SB(sb);
+
+	if ((osb->s_mount_opt & OCFS2_MOUNT_LOCALFLOCKS) ||
+	    ocfs2_mount_local(osb) || !ocfs2_stack_supports_plocks())
+		use_plocks = 0;
+
+	/*
+	 * These have all been checked by ocfs2_read_inode_block() or set
+	 * by ocfs2_mknod_locked(), so a failure is a code bug.
+	 */
+	BUG_ON(!OCFS2_IS_VALID_DINODE(fe));  /* This means that read_inode
+						cannot create a superblock
+						inode today.  change if
+						that is needed. */
+	BUG_ON(!(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL)));
+	BUG_ON(le32_to_cpu(fe->i_fs_generation) != osb->fs_generation);
+
+
+	OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
+	OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
+	OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
+
+	inode->i_version = 1;
+	inode->i_generation = le32_to_cpu(fe->i_generation);
+	inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
+	inode->i_mode = le16_to_cpu(fe->i_mode);
+	i_uid_write(inode, le32_to_cpu(fe->i_uid));
+	i_gid_write(inode, le32_to_cpu(fe->i_gid));
+
+	/* Fast symlinks will have i_size but no allocated clusters. */
+	if (S_ISLNK(inode->i_mode) && !fe->i_clusters) {
+		inode->i_blocks = 0;
+		inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
+	} else {
+		inode->i_blocks = ocfs2_inode_sector_count(inode);
+		inode->i_mapping->a_ops = &ocfs2_aops;
+	}
+	inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
+	inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
+	inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
+	inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
+	inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
+	inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
+
+	if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
+		mlog(ML_ERROR,
+		     "ip_blkno %llu != i_blkno %llu!\n",
+		     (unsigned long long)OCFS2_I(inode)->ip_blkno,
+		     (unsigned long long)le64_to_cpu(fe->i_blkno));
+
+	set_nlink(inode, ocfs2_read_links_count(fe));
+
+	trace_ocfs2_populate_inode(OCFS2_I(inode)->ip_blkno,
+				   le32_to_cpu(fe->i_flags));
+	if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) {
+		OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
+		inode->i_flags |= S_NOQUOTA;
+	}
+  
+	if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
+		OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
+	} else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
+		OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
+	} else if (fe->i_flags & cpu_to_le32(OCFS2_QUOTA_FL)) {
+		inode->i_flags |= S_NOQUOTA;
+	} else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
+		/* we can't actually hit this as read_inode can't
+		 * handle superblocks today ;-) */
+		BUG();
+	}
+
+	switch (inode->i_mode & S_IFMT) {
+	    case S_IFREG:
+		    if (use_plocks)
+			    inode->i_fop = &ocfs2_fops;
+		    else
+			    inode->i_fop = &ocfs2_fops_no_plocks;
+		    inode->i_op = &ocfs2_file_iops;
+		    i_size_write(inode, le64_to_cpu(fe->i_size));
+		    break;
+	    case S_IFDIR:
+		    inode->i_op = &ocfs2_dir_iops;
+		    if (use_plocks)
+			    inode->i_fop = &ocfs2_dops;
+		    else
+			    inode->i_fop = &ocfs2_dops_no_plocks;
+		    i_size_write(inode, le64_to_cpu(fe->i_size));
+		    OCFS2_I(inode)->ip_dir_lock_gen = 1;
+		    break;
+	    case S_IFLNK:
+		    inode->i_op = &ocfs2_symlink_inode_operations;
+		    i_size_write(inode, le64_to_cpu(fe->i_size));
+		    break;
+	    default:
+		    inode->i_op = &ocfs2_special_file_iops;
+		    init_special_inode(inode, inode->i_mode,
+				       inode->i_rdev);
+		    break;
+	}
+
+	if (create_ino) {
+		inode->i_ino = ino_from_blkno(inode->i_sb,
+			       le64_to_cpu(fe->i_blkno));
+
+		/*
+		 * If we ever want to create system files from kernel,
+		 * the generation argument to
+		 * ocfs2_inode_lock_res_init() will have to change.
+		 */
+		BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL);
+
+		ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
+					  OCFS2_LOCK_TYPE_META, 0, inode);
+
+		ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
+					  OCFS2_LOCK_TYPE_OPEN, 0, inode);
+	}
+
+	ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
+				  OCFS2_LOCK_TYPE_RW, inode->i_generation,
+				  inode);
+
+	ocfs2_set_inode_flags(inode);
+
+	OCFS2_I(inode)->ip_last_used_slot = 0;
+	OCFS2_I(inode)->ip_last_used_group = 0;
+
+	if (S_ISDIR(inode->i_mode))
+		ocfs2_resv_set_type(&OCFS2_I(inode)->ip_la_data_resv,
+				    OCFS2_RESV_FLAG_DIR);
+}
+
+static int ocfs2_read_locked_inode(struct inode *inode,
+				   struct ocfs2_find_inode_args *args)
+{
+	struct super_block *sb;
+	struct ocfs2_super *osb;
+	struct ocfs2_dinode *fe;
+	struct buffer_head *bh = NULL;
+	int status, can_lock;
+	u32 generation = 0;
+
+	status = -EINVAL;
+	sb = inode->i_sb;
+	osb = OCFS2_SB(sb);
+
+	/*
+	 * To improve performance of cold-cache inode stats, we take
+	 * the cluster lock here if possible.
+	 *
+	 * Generally, OCFS2 never trusts the contents of an inode
+	 * unless it's holding a cluster lock, so taking it here isn't
+	 * a correctness issue as much as it is a performance
+	 * improvement.
+	 *
+	 * There are three times when taking the lock is not a good idea:
+	 *
+	 * 1) During startup, before we have initialized the DLM.
+	 *
+	 * 2) If we are reading certain system files which never get
+	 *    cluster locks (local alloc, truncate log).
+	 *
+	 * 3) If the process doing the iget() is responsible for
+	 *    orphan dir recovery. We're holding the orphan dir lock and
+	 *    can get into a deadlock with another process on another
+	 *    node in ->delete_inode().
+	 *
+	 * #1 and #2 can be simply solved by never taking the lock
+	 * here for system files (which are the only type we read
+	 * during mount). It's a heavier approach, but our main
+	 * concern is user-accessible files anyway.
+	 *
+	 * #3 works itself out because we'll eventually take the
+	 * cluster lock before trusting anything anyway.
+	 */
+	can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
+		&& !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY)
+		&& !ocfs2_mount_local(osb);
+
+	trace_ocfs2_read_locked_inode(
+		(unsigned long long)OCFS2_I(inode)->ip_blkno, can_lock);
+
+	/*
+	 * To maintain backwards compatibility with older versions of
+	 * ocfs2-tools, we still store the generation value for system
+	 * files. The only ones that actually matter to userspace are
+	 * the journals, but it's easier and inexpensive to just flag
+	 * all system files similarly.
+	 */
+	if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
+		generation = osb->fs_generation;
+
+	ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
+				  OCFS2_LOCK_TYPE_META,
+				  generation, inode);
+
+	ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
+				  OCFS2_LOCK_TYPE_OPEN,
+				  0, inode);
+
+	if (can_lock) {
+		status = ocfs2_open_lock(inode);
+		if (status) {
+			make_bad_inode(inode);
+			mlog_errno(status);
+			return status;
+		}
+		status = ocfs2_inode_lock(inode, NULL, 0);
+		if (status) {
+			make_bad_inode(inode);
+			mlog_errno(status);
+			return status;
+		}
+	}
+
+	if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) {
+		status = ocfs2_try_open_lock(inode, 0);
+		if (status) {
+			make_bad_inode(inode);
+			return status;
+		}
+	}
+
+	if (can_lock) {
+		status = ocfs2_read_inode_block_full(inode, &bh,
+						     OCFS2_BH_IGNORE_CACHE);
+	} else {
+		status = ocfs2_read_blocks_sync(osb, args->fi_blkno, 1, &bh);
+		/*
+		 * If buffer is in jbd, then its checksum may not have been
+		 * computed as yet.
+		 */
+		if (!status && !buffer_jbd(bh))
+			status = ocfs2_validate_inode_block(osb->sb, bh);
+	}
+	if (status < 0) {
+		mlog_errno(status);
+		goto bail;
+	}
+
+	status = -EINVAL;
+	fe = (struct ocfs2_dinode *) bh->b_data;
+
+	/*
+	 * This is a code bug. Right now the caller needs to
+	 * understand whether it is asking for a system file inode or
+	 * not so the proper lock names can be built.
+	 */
+	mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) !=
+			!!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE),
+			"Inode %llu: system file state is ambigous\n",
+			(unsigned long long)args->fi_blkno);
+
+	if (S_ISCHR(le16_to_cpu(fe->i_mode)) ||
+	    S_ISBLK(le16_to_cpu(fe->i_mode)))
+		inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
+
+	ocfs2_populate_inode(inode, fe, 0);
+
+	BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));
+
+	status = 0;
+
+bail:
+	if (can_lock)
+		ocfs2_inode_unlock(inode, 0);
+
+	if (status < 0)
+		make_bad_inode(inode);
+
+	brelse(bh);
+
+	return status;
+}
+
+void ocfs2_sync_blockdev(struct super_block *sb)
+{
+	sync_blockdev(sb->s_bdev);
+}
+
+static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
+				     struct inode *inode,
+				     struct buffer_head *fe_bh)
+{
+	int status = 0;
+	struct ocfs2_dinode *fe;
+	handle_t *handle = NULL;
+
+	fe = (struct ocfs2_dinode *) fe_bh->b_data;
+
+	/*
+	 * This check will also skip truncate of inodes with inline
+	 * data and fast symlinks.
+	 */
+	if (fe->i_clusters) {
+		if (ocfs2_should_order_data(inode))
+			ocfs2_begin_ordered_truncate(inode, 0);
+
+		handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
+		if (IS_ERR(handle)) {
+			status = PTR_ERR(handle);
+			handle = NULL;
+			mlog_errno(status);
+			goto out;
+		}
+
+		status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
+						 fe_bh,
+						 OCFS2_JOURNAL_ACCESS_WRITE);
+		if (status < 0) {
+			mlog_errno(status);
+			goto out;
+		}
+
+		i_size_write(inode, 0);
+
+		status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
+		if (status < 0) {
+			mlog_errno(status);
+			goto out;
+		}
+
+		ocfs2_commit_trans(osb, handle);
+		handle = NULL;
+
+		status = ocfs2_commit_truncate(osb, inode, fe_bh);
+		if (status < 0) {
+			mlog_errno(status);
+			goto out;
+		}
+	}
+
+out:
+	if (handle)
+		ocfs2_commit_trans(osb, handle);
+	return status;
+}
+
+static int ocfs2_remove_inode(struct inode *inode,
+			      struct buffer_head *di_bh,
+			      struct inode *orphan_dir_inode,
+			      struct buffer_head *orphan_dir_bh)
+{
+	int status;
+	struct inode *inode_alloc_inode = NULL;
+	struct buffer_head *inode_alloc_bh = NULL;
+	handle_t *handle;
+	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+	struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
+
+	inode_alloc_inode =
+		ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE,
+					    le16_to_cpu(di->i_suballoc_slot));
+	if (!inode_alloc_inode) {
+		status = -ENOENT;
+		mlog_errno(status);
+		goto bail;
+	}
+
+	mutex_lock(&inode_alloc_inode->i_mutex);
+	status = ocfs2_inode_lock(inode_alloc_inode, &inode_alloc_bh, 1);
+	if (status < 0) {
+		mutex_unlock(&inode_alloc_inode->i_mutex);
+
+		mlog_errno(status);
+		goto bail;
+	}
+
+	handle = ocfs2_start_trans(osb, OCFS2_DELETE_INODE_CREDITS +
+				   ocfs2_quota_trans_credits(inode->i_sb));
+	if (IS_ERR(handle)) {
+		status = PTR_ERR(handle);
+		mlog_errno(status);
+		goto bail_unlock;
+	}
+
+	if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
+		status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
+					  orphan_dir_bh, false);
+		if (status < 0) {
+			mlog_errno(status);
+			goto bail_commit;
+		}
+	}
+
+	/* set the inodes dtime */
+	status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
+					 OCFS2_JOURNAL_ACCESS_WRITE);
+	if (status < 0) {
+		mlog_errno(status);
+		goto bail_commit;
+	}
+
+	di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec);
+	di->i_flags &= cpu_to_le32(~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL));
+	ocfs2_journal_dirty(handle, di_bh);
+
+	ocfs2_remove_from_cache(INODE_CACHE(inode), di_bh);
+	dquot_free_inode(inode);
+
+	status = ocfs2_free_dinode(handle, inode_alloc_inode,
+				   inode_alloc_bh, di);
+	if (status < 0)
+		mlog_errno(status);
+
+bail_commit:
+	ocfs2_commit_trans(osb, handle);
+bail_unlock:
+	ocfs2_inode_unlock(inode_alloc_inode, 1);
+	mutex_unlock(&inode_alloc_inode->i_mutex);
+	brelse(inode_alloc_bh);
+bail:
+	iput(inode_alloc_inode);
+
+	return status;
+}
+
+/*
+ * Serialize with orphan dir recovery. If the process doing
+ * recovery on this orphan dir does an iget() with the dir
+ * i_mutex held, we'll deadlock here. Instead we detect this
+ * and exit early - recovery will wipe this inode for us.
+ */
+static int ocfs2_check_orphan_recovery_state(struct ocfs2_super *osb,
+					     int slot)
+{
+	int ret = 0;
+
+	spin_lock(&osb->osb_lock);
+	if (ocfs2_node_map_test_bit(osb, &osb->osb_recovering_orphan_dirs, slot)) {
+		ret = -EDEADLK;
+		goto out;
+	}
+	/* This signals to the orphan recovery process that it should
+	 * wait for us to handle the wipe. */
+	osb->osb_orphan_wipes[slot]++;
+out:
+	spin_unlock(&osb->osb_lock);
+	trace_ocfs2_check_orphan_recovery_state(slot, ret);
+	return ret;
+}
+
+static void ocfs2_signal_wipe_completion(struct ocfs2_super *osb,
+					 int slot)
+{
+	spin_lock(&osb->osb_lock);
+	osb->osb_orphan_wipes[slot]--;
+	spin_unlock(&osb->osb_lock);
+
+	wake_up(&osb->osb_wipe_event);
+}
+
+static int ocfs2_wipe_inode(struct inode *inode,
+			    struct buffer_head *di_bh)
+{
+	int status, orphaned_slot = -1;
+	struct inode *orphan_dir_inode = NULL;
+	struct buffer_head *orphan_dir_bh = NULL;
+	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+	struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
+
+	if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
+		orphaned_slot = le16_to_cpu(di->i_orphaned_slot);
+
+		status = ocfs2_check_orphan_recovery_state(osb, orphaned_slot);
+		if (status)
+			return status;
+
+		orphan_dir_inode = ocfs2_get_system_file_inode(osb,
+							       ORPHAN_DIR_SYSTEM_INODE,
+							       orphaned_slot);
+		if (!orphan_dir_inode) {
+			status = -ENOENT;
+			mlog_errno(status);
+			goto bail;
+		}
+
+		/* Lock the orphan dir. The lock will be held for the entire
+		 * delete_inode operation. We do this now to avoid races with
+		 * recovery completion on other nodes. */
+		mutex_lock(&orphan_dir_inode->i_mutex);
+		status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
+		if (status < 0) {
+			mutex_unlock(&orphan_dir_inode->i_mutex);
+
+			mlog_errno(status);
+			goto bail;
+		}
+	}
+
+	/* we do this while holding the orphan dir lock because we
+	 * don't want recovery being run from another node to try an
+	 * inode delete underneath us -- this will result in two nodes
+	 * truncating the same file! */
+	status = ocfs2_truncate_for_delete(osb, inode, di_bh);
+	if (status < 0) {
+		mlog_errno(status);
+		goto bail_unlock_dir;
+	}
+
+	/* Remove any dir index tree */
+	if (S_ISDIR(inode->i_mode)) {
+		status = ocfs2_dx_dir_truncate(inode, di_bh);
+		if (status) {
+			mlog_errno(status);
+			goto bail_unlock_dir;
+		}
+	}
+
+	/*Free extended attribute resources associated with this inode.*/
+	status = ocfs2_xattr_remove(inode, di_bh);
+	if (status < 0) {
+		mlog_errno(status);
+		goto bail_unlock_dir;
+	}
+
+	status = ocfs2_remove_refcount_tree(inode, di_bh);
+	if (status < 0) {
+		mlog_errno(status);
+		goto bail_unlock_dir;
+	}
+
+	status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
+				    orphan_dir_bh);
+	if (status < 0)
+		mlog_errno(status);
+
+bail_unlock_dir:
+	if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)
+		return status;
+
+	ocfs2_inode_unlock(orphan_dir_inode, 1);
+	mutex_unlock(&orphan_dir_inode->i_mutex);
+	brelse(orphan_dir_bh);
+bail:
+	iput(orphan_dir_inode);
+	ocfs2_signal_wipe_completion(osb, orphaned_slot);
+
+	return status;
+}
+
+/* There is a series of simple checks that should be done before a
+ * trylock is even considered. Encapsulate those in this function. */
+static int ocfs2_inode_is_valid_to_delete(struct inode *inode)
+{
+	int ret = 0;
+	struct ocfs2_inode_info *oi = OCFS2_I(inode);
+	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+
+	trace_ocfs2_inode_is_valid_to_delete(current, osb->dc_task,
+					     (unsigned long long)oi->ip_blkno,
+					     oi->ip_flags);
+
+	/* We shouldn't be getting here for the root directory
+	 * inode.. */
+	if (inode == osb->root_inode) {
+		mlog(ML_ERROR, "Skipping delete of root inode.\n");
+		goto bail;
+	}
+
+	/*
+	 * If we're coming from downconvert_thread we can't go into our own
+	 * voting [hello, deadlock city!] so we cannot delete the inode. But
+	 * since we dropped last inode ref when downconverting dentry lock,
+	 * we cannot have the file open and thus the node doing unlink will
+	 * take care of deleting the inode.
+	 */
+	if (current == osb->dc_task)
+		goto bail;
+
+	spin_lock(&oi->ip_lock);
+	/* OCFS2 *never* deletes system files. This should technically
+	 * never get here as system file inodes should always have a
+	 * positive link count. */
+	if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) {
+		mlog(ML_ERROR, "Skipping delete of system file %llu\n",
+		     (unsigned long long)oi->ip_blkno);
+		goto bail_unlock;
+	}
+
+	ret = 1;
+bail_unlock:
+	spin_unlock(&oi->ip_lock);
+bail:
+	return ret;
+}
+
+/* Query the cluster to determine whether we should wipe an inode from
+ * disk or not.
+ *
+ * Requires the inode to have the cluster lock. */
+static int ocfs2_query_inode_wipe(struct inode *inode,
+				  struct buffer_head *di_bh,
+				  int *wipe)
+{
+	int status = 0, reason = 0;
+	struct ocfs2_inode_info *oi = OCFS2_I(inode);
+	struct ocfs2_dinode *di;
+
+	*wipe = 0;
+
+	trace_ocfs2_query_inode_wipe_begin((unsigned long long)oi->ip_blkno,
+					   inode->i_nlink);
+
+	/* While we were waiting for the cluster lock in
+	 * ocfs2_delete_inode, another node might have asked to delete
+	 * the inode. Recheck our flags to catch this. */
+	if (!ocfs2_inode_is_valid_to_delete(inode)) {
+		reason = 1;
+		goto bail;
+	}
+
+	/* Now that we have an up to date inode, we can double check
+	 * the link count. */
+	if (inode->i_nlink)
+		goto bail;
+
+	/* Do some basic inode verification... */
+	di = (struct ocfs2_dinode *) di_bh->b_data;
+	if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL)) &&
+	    !(oi->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
+		/*
+		 * Inodes in the orphan dir must have ORPHANED_FL.  The only
+		 * inodes that come back out of the orphan dir are reflink
+		 * targets. A reflink target may be moved out of the orphan
+		 * dir between the time we scan the directory and the time we
+		 * process it. This would lead to HAS_REFCOUNT_FL being set but
+		 * ORPHANED_FL not.
+		 */
+		if (di->i_dyn_features & cpu_to_le16(OCFS2_HAS_REFCOUNT_FL)) {
+			reason = 2;
+			goto bail;
+		}
+
+		/* for lack of a better error? */
+		status = -EEXIST;
+		mlog(ML_ERROR,
+		     "Inode %llu (on-disk %llu) not orphaned! "
+		     "Disk flags  0x%x, inode flags 0x%x\n",
+		     (unsigned long long)oi->ip_blkno,
+		     (unsigned long long)le64_to_cpu(di->i_blkno),
+		     le32_to_cpu(di->i_flags), oi->ip_flags);
+		goto bail;
+	}
+
+	/* has someone already deleted us?! baaad... */
+	if (di->i_dtime) {
+		status = -EEXIST;
+		mlog_errno(status);
+		goto bail;
+	}
+
+	/*
+	 * This is how ocfs2 determines whether an inode is still live
+	 * within the cluster. Every node takes a shared read lock on
+	 * the inode open lock in ocfs2_read_locked_inode(). When we
+	 * get to ->delete_inode(), each node tries to convert it's
+	 * lock to an exclusive. Trylocks are serialized by the inode
+	 * meta data lock. If the upconvert succeeds, we know the inode
+	 * is no longer live and can be deleted.
+	 *
+	 * Though we call this with the meta data lock held, the
+	 * trylock keeps us from ABBA deadlock.
+	 */
+	status = ocfs2_try_open_lock(inode, 1);
+	if (status == -EAGAIN) {
+		status = 0;
+		reason = 3;
+		goto bail;
+	}
+	if (status < 0) {
+		mlog_errno(status);
+		goto bail;
+	}
+
+	*wipe = 1;
+	trace_ocfs2_query_inode_wipe_succ(le16_to_cpu(di->i_orphaned_slot));
+
+bail:
+	trace_ocfs2_query_inode_wipe_end(status, reason);
+	return status;
+}
+
+/* Support function for ocfs2_delete_inode. Will help us keep the
+ * inode data in a consistent state for clear_inode. Always truncates
+ * pages, optionally sync's them first. */
+static void ocfs2_cleanup_delete_inode(struct inode *inode,
+				       int sync_data)
+{
+	trace_ocfs2_cleanup_delete_inode(
+		(unsigned long long)OCFS2_I(inode)->ip_blkno, sync_data);
+	if (sync_data)
+		filemap_write_and_wait(inode->i_mapping);
+	truncate_inode_pages_final(&inode->i_data);
+}
+
+static void ocfs2_delete_inode(struct inode *inode)
+{
+	int wipe, status;
+	sigset_t oldset;
+	struct buffer_head *di_bh = NULL;
+
+	trace_ocfs2_delete_inode(inode->i_ino,
+				 (unsigned long long)OCFS2_I(inode)->ip_blkno,
+				 is_bad_inode(inode));
+
+	/* When we fail in read_inode() we mark inode as bad. The second test
+	 * catches the case when inode allocation fails before allocating
+	 * a block for inode. */
+	if (is_bad_inode(inode) || !OCFS2_I(inode)->ip_blkno)
+		goto bail;
+
+	if (!ocfs2_inode_is_valid_to_delete(inode)) {
+		/* It's probably not necessary to truncate_inode_pages
+		 * here but we do it for safety anyway (it will most
+		 * likely be a no-op anyway) */
+		ocfs2_cleanup_delete_inode(inode, 0);
+		goto bail;
+	}
+
+	dquot_initialize(inode);
+
+	/* We want to block signals in delete_inode as the lock and
+	 * messaging paths may return us -ERESTARTSYS. Which would
+	 * cause us to exit early, resulting in inodes being orphaned
+	 * forever. */
+	ocfs2_block_signals(&oldset);
+
+	/*
+	 * Synchronize us against ocfs2_get_dentry. We take this in
+	 * shared mode so that all nodes can still concurrently
+	 * process deletes.
+	 */
+	status = ocfs2_nfs_sync_lock(OCFS2_SB(inode->i_sb), 0);
+	if (status < 0) {
+		mlog(ML_ERROR, "getting nfs sync lock(PR) failed %d\n", status);
+		ocfs2_cleanup_delete_inode(inode, 0);
+		goto bail_unblock;
+	}
+	/* Lock down the inode. This gives us an up to date view of
+	 * it's metadata (for verification), and allows us to
+	 * serialize delete_inode on multiple nodes.
+	 *
+	 * Even though we might be doing a truncate, we don't take the
+	 * allocation lock here as it won't be needed - nobody will
+	 * have the file open.
+	 */
+	status = ocfs2_inode_lock(inode, &di_bh, 1);
+	if (status < 0) {
+		if (status != -ENOENT)
+			mlog_errno(status);
+		ocfs2_cleanup_delete_inode(inode, 0);
+		goto bail_unlock_nfs_sync;
+	}
+
+	/* Query the cluster. This will be the final decision made
+	 * before we go ahead and wipe the inode. */
+	status = ocfs2_query_inode_wipe(inode, di_bh, &wipe);
+	if (!wipe || status < 0) {
+		/* Error and remote inode busy both mean we won't be
+		 * removing the inode, so they take almost the same
+		 * path. */
+		if (status < 0)
+			mlog_errno(status);
+
+		/* Someone in the cluster has disallowed a wipe of
+		 * this inode, or it was never completely
+		 * orphaned. Write out the pages and exit now. */
+		ocfs2_cleanup_delete_inode(inode, 1);
+		goto bail_unlock_inode;
+	}
+
+	ocfs2_cleanup_delete_inode(inode, 0);
+
+	status = ocfs2_wipe_inode(inode, di_bh);
+	if (status < 0) {
+		if (status != -EDEADLK)
+			mlog_errno(status);
+		goto bail_unlock_inode;
+	}
+
+	/*
+	 * Mark the inode as successfully deleted.
+	 *
+	 * This is important for ocfs2_clear_inode() as it will check
+	 * this flag and skip any checkpointing work
+	 *
+	 * ocfs2_stuff_meta_lvb() also uses this flag to invalidate
+	 * the LVB for other nodes.
+	 */
+	OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED;
+
+bail_unlock_inode:
+	ocfs2_inode_unlock(inode, 1);
+	brelse(di_bh);
+
+bail_unlock_nfs_sync:
+	ocfs2_nfs_sync_unlock(OCFS2_SB(inode->i_sb), 0);
+
+bail_unblock:
+	ocfs2_unblock_signals(&oldset);
+bail:
+	return;
+}
+
+static void ocfs2_clear_inode(struct inode *inode)
+{
+	int status;
+	struct ocfs2_inode_info *oi = OCFS2_I(inode);
+	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+
+	clear_inode(inode);
+	trace_ocfs2_clear_inode((unsigned long long)oi->ip_blkno,
+				inode->i_nlink);
+
+	mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL,
+			"Inode=%lu\n", inode->i_ino);
+
+	dquot_drop(inode);
+
+	/* To preven remote deletes we hold open lock before, now it
+	 * is time to unlock PR and EX open locks. */
+	ocfs2_open_unlock(inode);
+
+	/* Do these before all the other work so that we don't bounce
+	 * the downconvert thread while waiting to destroy the locks. */
+	ocfs2_mark_lockres_freeing(osb, &oi->ip_rw_lockres);
+	ocfs2_mark_lockres_freeing(osb, &oi->ip_inode_lockres);
+	ocfs2_mark_lockres_freeing(osb, &oi->ip_open_lockres);
+
+	ocfs2_resv_discard(&OCFS2_SB(inode->i_sb)->osb_la_resmap,
+			   &oi->ip_la_data_resv);
+	ocfs2_resv_init_once(&oi->ip_la_data_resv);
+
+	/* We very well may get a clear_inode before all an inodes
+	 * metadata has hit disk. Of course, we can't drop any cluster
+	 * locks until the journal has finished with it. The only
+	 * exception here are successfully wiped inodes - their
+	 * metadata can now be considered to be part of the system
+	 * inodes from which it came. */
+	if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED))
+		ocfs2_checkpoint_inode(inode);
+
+	mlog_bug_on_msg(!list_empty(&oi->ip_io_markers),
+			"Clear inode of %llu, inode has io markers\n",
+			(unsigned long long)oi->ip_blkno);
+
+	ocfs2_extent_map_trunc(inode, 0);
+
+	status = ocfs2_drop_inode_locks(inode);
+	if (status < 0)
+		mlog_errno(status);
+
+	ocfs2_lock_res_free(&oi->ip_rw_lockres);
+	ocfs2_lock_res_free(&oi->ip_inode_lockres);
+	ocfs2_lock_res_free(&oi->ip_open_lockres);
+
+	ocfs2_metadata_cache_exit(INODE_CACHE(inode));
+
+	mlog_bug_on_msg(INODE_CACHE(inode)->ci_num_cached,
+			"Clear inode of %llu, inode has %u cache items\n",
+			(unsigned long long)oi->ip_blkno,
+			INODE_CACHE(inode)->ci_num_cached);
+
+	mlog_bug_on_msg(!(INODE_CACHE(inode)->ci_flags & OCFS2_CACHE_FL_INLINE),
+			"Clear inode of %llu, inode has a bad flag\n",
+			(unsigned long long)oi->ip_blkno);
+
+	mlog_bug_on_msg(spin_is_locked(&oi->ip_lock),
+			"Clear inode of %llu, inode is locked\n",
+			(unsigned long long)oi->ip_blkno);
+
+	mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex),
+			"Clear inode of %llu, io_mutex is locked\n",
+			(unsigned long long)oi->ip_blkno);
+	mutex_unlock(&oi->ip_io_mutex);
+
+	/*
+	 * down_trylock() returns 0, down_write_trylock() returns 1
+	 * kernel 1, world 0
+	 */
+	mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem),
+			"Clear inode of %llu, alloc_sem is locked\n",
+			(unsigned long long)oi->ip_blkno);
+	up_write(&oi->ip_alloc_sem);
+
+	mlog_bug_on_msg(oi->ip_open_count,
+			"Clear inode of %llu has open count %d\n",
+			(unsigned long long)oi->ip_blkno, oi->ip_open_count);
+
+	/* Clear all other flags. */
+	oi->ip_flags = 0;
+	oi->ip_dir_start_lookup = 0;
+	oi->ip_blkno = 0ULL;
+
+	/*
+	 * ip_jinode is used to track txns against this inode. We ensure that
+	 * the journal is flushed before journal shutdown. Thus it is safe to
+	 * have inodes get cleaned up after journal shutdown.
+	 */
+	jbd2_journal_release_jbd_inode(OCFS2_SB(inode->i_sb)->journal->j_journal,
+				       &oi->ip_jinode);
+}
+
+void ocfs2_evict_inode(struct inode *inode)
+{
+	if (!inode->i_nlink ||
+	    (OCFS2_I(inode)->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)) {
+		ocfs2_delete_inode(inode);
+	} else {
+		truncate_inode_pages_final(&inode->i_data);
+	}
+	ocfs2_clear_inode(inode);
+}
+
+/* Called under inode_lock, with no more references on the
+ * struct inode, so it's safe here to check the flags field
+ * and to manipulate i_nlink without any other locks. */
+int ocfs2_drop_inode(struct inode *inode)
+{
+	struct ocfs2_inode_info *oi = OCFS2_I(inode);
+	int res;
+
+	trace_ocfs2_drop_inode((unsigned long long)oi->ip_blkno,
+				inode->i_nlink, oi->ip_flags);
+
+	if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)
+		res = 1;
+	else
+		res = generic_drop_inode(inode);
+
+	return res;
+}
+
+/*
+ * This is called from our getattr.
+ */
+int ocfs2_inode_revalidate(struct dentry *dentry)
+{
+	struct inode *inode = d_inode(dentry);
+	int status = 0;
+
+	trace_ocfs2_inode_revalidate(inode,
+		inode ? (unsigned long long)OCFS2_I(inode)->ip_blkno : 0ULL,
+		inode ? (unsigned long long)OCFS2_I(inode)->ip_flags : 0);
+
+	if (!inode) {
+		status = -ENOENT;
+		goto bail;
+	}
+
+	spin_lock(&OCFS2_I(inode)->ip_lock);
+	if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
+		spin_unlock(&OCFS2_I(inode)->ip_lock);
+		status = -ENOENT;
+		goto bail;
+	}
+	spin_unlock(&OCFS2_I(inode)->ip_lock);
+
+	/* Let ocfs2_inode_lock do the work of updating our struct
+	 * inode for us. */
+	status = ocfs2_inode_lock(inode, NULL, 0);
+	if (status < 0) {
+		if (status != -ENOENT)
+			mlog_errno(status);
+		goto bail;
+	}
+	ocfs2_inode_unlock(inode, 0);
+bail:
+	return status;
+}
+
+/*
+ * Updates a disk inode from a
+ * struct inode.
+ * Only takes ip_lock.
+ */
+int ocfs2_mark_inode_dirty(handle_t *handle,
+			   struct inode *inode,
+			   struct buffer_head *bh)
+{
+	int status;
+	struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data;
+
+	trace_ocfs2_mark_inode_dirty((unsigned long long)OCFS2_I(inode)->ip_blkno);
+
+	status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
+					 OCFS2_JOURNAL_ACCESS_WRITE);
+	if (status < 0) {
+		mlog_errno(status);
+		goto leave;
+	}
+
+	spin_lock(&OCFS2_I(inode)->ip_lock);
+	fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
+	ocfs2_get_inode_flags(OCFS2_I(inode));
+	fe->i_attr = cpu_to_le32(OCFS2_I(inode)->ip_attr);
+	fe->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features);
+	spin_unlock(&OCFS2_I(inode)->ip_lock);
+
+	fe->i_size = cpu_to_le64(i_size_read(inode));
+	ocfs2_set_links_count(fe, inode->i_nlink);
+	fe->i_uid = cpu_to_le32(i_uid_read(inode));
+	fe->i_gid = cpu_to_le32(i_gid_read(inode));
+	fe->i_mode = cpu_to_le16(inode->i_mode);
+	fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
+	fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
+	fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
+	fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
+	fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
+	fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
+
+	ocfs2_journal_dirty(handle, bh);
+	ocfs2_update_inode_fsync_trans(handle, inode, 1);
+leave:
+	return status;
+}
+
+/*
+ *
+ * Updates a struct inode from a disk inode.
+ * does no i/o, only takes ip_lock.
+ */
+void ocfs2_refresh_inode(struct inode *inode,
+			 struct ocfs2_dinode *fe)
+{
+	spin_lock(&OCFS2_I(inode)->ip_lock);
+
+	OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
+	OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
+	OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
+	ocfs2_set_inode_flags(inode);
+	i_size_write(inode, le64_to_cpu(fe->i_size));
+	set_nlink(inode, ocfs2_read_links_count(fe));
+	i_uid_write(inode, le32_to_cpu(fe->i_uid));
+	i_gid_write(inode, le32_to_cpu(fe->i_gid));
+	inode->i_mode = le16_to_cpu(fe->i_mode);
+	if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0)
+		inode->i_blocks = 0;
+	else
+		inode->i_blocks = ocfs2_inode_sector_count(inode);
+	inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
+	inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
+	inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
+	inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
+	inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
+	inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
+
+	spin_unlock(&OCFS2_I(inode)->ip_lock);
+}
+
+int ocfs2_validate_inode_block(struct super_block *sb,
+			       struct buffer_head *bh)
+{
+	int rc;
+	struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
+
+	trace_ocfs2_validate_inode_block((unsigned long long)bh->b_blocknr);
+
+	BUG_ON(!buffer_uptodate(bh));
+
+	/*
+	 * If the ecc fails, we return the error but otherwise
+	 * leave the filesystem running.  We know any error is
+	 * local to this block.
+	 */
+	rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check);
+	if (rc) {
+		mlog(ML_ERROR, "Checksum failed for dinode %llu\n",
+		     (unsigned long long)bh->b_blocknr);
+		goto bail;
+	}
+
+	/*
+	 * Errors after here are fatal.
+	 */
+
+	rc = -EINVAL;
+
+	if (!OCFS2_IS_VALID_DINODE(di)) {
+		ocfs2_error(sb, "Invalid dinode #%llu: signature = %.*s\n",
+			    (unsigned long long)bh->b_blocknr, 7,
+			    di->i_signature);
+		goto bail;
+	}
+
+	if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
+		ocfs2_error(sb, "Invalid dinode #%llu: i_blkno is %llu\n",
+			    (unsigned long long)bh->b_blocknr,
+			    (unsigned long long)le64_to_cpu(di->i_blkno));
+		goto bail;
+	}
+
+	if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
+		ocfs2_error(sb,
+			    "Invalid dinode #%llu: OCFS2_VALID_FL not set\n",
+			    (unsigned long long)bh->b_blocknr);
+		goto bail;
+	}
+
+	if (le32_to_cpu(di->i_fs_generation) !=
+	    OCFS2_SB(sb)->fs_generation) {
+		ocfs2_error(sb,
+			    "Invalid dinode #%llu: fs_generation is %u\n",
+			    (unsigned long long)bh->b_blocknr,
+			    le32_to_cpu(di->i_fs_generation));
+		goto bail;
+	}
+
+	rc = 0;
+
+bail:
+	return rc;
+}
+
+int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
+				int flags)
+{
+	int rc;
+	struct buffer_head *tmp = *bh;
+
+	rc = ocfs2_read_blocks(INODE_CACHE(inode), OCFS2_I(inode)->ip_blkno,
+			       1, &tmp, flags, ocfs2_validate_inode_block);
+
+	/* If ocfs2_read_blocks() got us a new bh, pass it up. */
+	if (!rc && !*bh)
+		*bh = tmp;
+
+	return rc;
+}
+
+int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh)
+{
+	return ocfs2_read_inode_block_full(inode, bh, 0);
+}
+
+
+static u64 ocfs2_inode_cache_owner(struct ocfs2_caching_info *ci)
+{
+	struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
+
+	return oi->ip_blkno;
+}
+
+static struct super_block *ocfs2_inode_cache_get_super(struct ocfs2_caching_info *ci)
+{
+	struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
+
+	return oi->vfs_inode.i_sb;
+}
+
+static void ocfs2_inode_cache_lock(struct ocfs2_caching_info *ci)
+{
+	struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
+
+	spin_lock(&oi->ip_lock);
+}
+
+static void ocfs2_inode_cache_unlock(struct ocfs2_caching_info *ci)
+{
+	struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
+
+	spin_unlock(&oi->ip_lock);
+}
+
+static void ocfs2_inode_cache_io_lock(struct ocfs2_caching_info *ci)
+{
+	struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
+
+	mutex_lock(&oi->ip_io_mutex);
+}
+
+static void ocfs2_inode_cache_io_unlock(struct ocfs2_caching_info *ci)
+{
+	struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
+
+	mutex_unlock(&oi->ip_io_mutex);
+}
+
+const struct ocfs2_caching_operations ocfs2_inode_caching_ops = {
+	.co_owner		= ocfs2_inode_cache_owner,
+	.co_get_super		= ocfs2_inode_cache_get_super,
+	.co_cache_lock		= ocfs2_inode_cache_lock,
+	.co_cache_unlock	= ocfs2_inode_cache_unlock,
+	.co_io_lock		= ocfs2_inode_cache_io_lock,
+	.co_io_unlock		= ocfs2_inode_cache_io_unlock,
+};
+