[safe/jmp/linux-2.6] / fs / ocfs2 / namei.c

/* -*- mode: c; c-basic-offset: 8; -*-
 * vim: noexpandtab sw=8 ts=8 sts=0:
 *
 * namei.c
 *
 * Create and rename file, directory, symlinks
 *
 * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
 *
 *  Portions of this code from linux/fs/ext3/dir.c
 *
 *  Copyright (C) 1992, 1993, 1994, 1995
 *  Remy Card (card@masi.ibp.fr)
 *  Laboratoire MASI - Institut Blaise pascal
 *  Universite Pierre et Marie Curie (Paris VI)
 *
 *   from
 *
 *   linux/fs/minix/dir.c
 *
 *   Copyright (C) 1991, 1992 Linux Torvalds
 *
 * 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/slab.h>
#include <linux/highmem.h>

#define MLOG_MASK_PREFIX ML_NAMEI
#include <cluster/masklog.h>

#include "ocfs2.h"

#include "alloc.h"
#include "dcache.h"
#include "dir.h"
#include "dlmglue.h"
#include "extent_map.h"
#include "file.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 "vote.h"

#include "buffer_head_io.h"

#define NAMEI_RA_CHUNKS  2
#define NAMEI_RA_BLOCKS  4
#define NAMEI_RA_SIZE        (NAMEI_RA_CHUNKS * NAMEI_RA_BLOCKS)
#define NAMEI_RA_INDEX(c,b)  (((c) * NAMEI_RA_BLOCKS) + (b))

static int inline ocfs2_search_dirblock(struct buffer_head *bh,
                                        struct inode *dir,
                                        const char *name, int namelen,
                                        unsigned long offset,
                                        struct ocfs2_dir_entry **res_dir);

static int ocfs2_delete_entry(struct ocfs2_journal_handle *handle,
                              struct inode *dir,
                              struct ocfs2_dir_entry *de_del,
                              struct buffer_head *bh);

static int __ocfs2_add_entry(struct ocfs2_journal_handle *handle,
                             struct inode *dir,
                             const char *name, int namelen,
                             struct inode *inode, u64 blkno,
                             struct buffer_head *parent_fe_bh,
                             struct buffer_head *insert_bh);

static int ocfs2_mknod_locked(struct ocfs2_super *osb,
                              struct inode *dir,
                              struct dentry *dentry, int mode,
                              dev_t dev,
                              struct buffer_head **new_fe_bh,
                              struct buffer_head *parent_fe_bh,
                              struct ocfs2_journal_handle *handle,
                              struct inode **ret_inode,
                              struct ocfs2_alloc_context *inode_ac);

static int ocfs2_fill_new_dir(struct ocfs2_super *osb,
                              struct ocfs2_journal_handle *handle,
                              struct inode *parent,
                              struct inode *inode,
                              struct buffer_head *fe_bh,
                              struct ocfs2_alloc_context *data_ac);

static int ocfs2_double_lock(struct ocfs2_super *osb,
                             struct ocfs2_journal_handle *handle,
                             struct buffer_head **bh1,
                             struct inode *inode1,
                             struct buffer_head **bh2,
                             struct inode *inode2);

static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
                                    struct ocfs2_journal_handle *handle,
                                    struct inode *inode,
                                    char *name,
                                    struct buffer_head **de_bh);

static int ocfs2_orphan_add(struct ocfs2_super *osb,
                            struct ocfs2_journal_handle *handle,
                            struct inode *inode,
                            struct ocfs2_dinode *fe,
                            char *name,
                            struct buffer_head *de_bh);

static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
                                     struct ocfs2_journal_handle *handle,
                                     struct inode *inode,
                                     const char *symname);

static inline int ocfs2_add_entry(struct ocfs2_journal_handle *handle,
                                  struct dentry *dentry,
                                  struct inode *inode, u64 blkno,
                                  struct buffer_head *parent_fe_bh,
                                  struct buffer_head *insert_bh)
{
        return __ocfs2_add_entry(handle, dentry->d_parent->d_inode,
                                 dentry->d_name.name, dentry->d_name.len,
                                 inode, blkno, parent_fe_bh, insert_bh);
}

/* An orphan dir name is an 8 byte value, printed as a hex string */
#define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))

static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
                                   struct nameidata *nd)
{
        int status;
        u64 blkno;
        struct buffer_head *dirent_bh = NULL;
        struct inode *inode = NULL;
        struct dentry *ret;
        struct ocfs2_dir_entry *dirent;
        struct ocfs2_inode_info *oi;

        mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
                   dentry->d_name.len, dentry->d_name.name);

        if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
                ret = ERR_PTR(-ENAMETOOLONG);
                goto bail;
        }

        mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len,
             dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno);

        status = ocfs2_meta_lock(dir, NULL, NULL, 0);
        if (status < 0) {
                if (status != -ENOENT)
                        mlog_errno(status);
                ret = ERR_PTR(status);
                goto bail;
        }

        status = ocfs2_find_files_on_disk(dentry->d_name.name,
                                          dentry->d_name.len, &blkno,
                                          dir, &dirent_bh, &dirent);
        if (status < 0)
                goto bail_add;

        inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0);
        if (IS_ERR(inode)) {
                mlog(ML_ERROR, "Unable to create inode %llu\n",
                     (unsigned long long)blkno);
                ret = ERR_PTR(-EACCES);
                goto bail_unlock;
        }

        oi = OCFS2_I(inode);
        /* Clear any orphaned state... If we were able to look up the
         * inode from a directory, it certainly can't be orphaned. We
         * might have the bad state from a node which intended to
         * orphan this inode but crashed before it could commit the
         * unlink. */
        spin_lock(&oi->ip_lock);
        oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
        oi->ip_orphaned_slot = OCFS2_INVALID_SLOT;
        spin_unlock(&oi->ip_lock);

bail_add:
        dentry->d_op = &ocfs2_dentry_ops;
        ret = d_splice_alias(inode, dentry);

        if (inode) {
                /*
                 * If d_splice_alias() finds a DCACHE_DISCONNECTED
                 * dentry, it will d_move() it on top of ourse. The
                 * return value will indicate this however, so in
                 * those cases, we switch them around for the locking
                 * code.
                 *
                 * NOTE: This dentry already has ->d_op set from
                 * ocfs2_get_parent() and ocfs2_get_dentry()
                 */
                if (ret)
                        dentry = ret;

                status = ocfs2_dentry_attach_lock(dentry, inode,
                                                  OCFS2_I(dir)->ip_blkno);
                if (status) {
                        mlog_errno(status);
                        ret = ERR_PTR(status);
                        goto bail_unlock;
                }
        }

bail_unlock:
        /* Don't drop the cluster lock until *after* the d_add --
         * unlink on another node will message us to remove that
         * dentry under this lock so otherwise we can race this with
         * the vote thread and have a stale dentry. */
        ocfs2_meta_unlock(dir, 0);

bail:
        if (dirent_bh)
                brelse(dirent_bh);

        mlog_exit_ptr(ret);

        return ret;
}

static int ocfs2_fill_new_dir(struct ocfs2_super *osb,
                              struct ocfs2_journal_handle *handle,
                              struct inode *parent,
                              struct inode *inode,
                              struct buffer_head *fe_bh,
                              struct ocfs2_alloc_context *data_ac)
{
        int status;
        struct buffer_head *new_bh = NULL;
        struct ocfs2_dir_entry *de = NULL;

        mlog_entry_void();

        status = ocfs2_do_extend_dir(osb->sb, handle, inode, fe_bh,
                                     data_ac, NULL, &new_bh);
        if (status < 0) {
                mlog_errno(status);
                goto bail;
        }

        ocfs2_set_new_buffer_uptodate(inode, new_bh);

        status = ocfs2_journal_access(handle, inode, new_bh,
                                      OCFS2_JOURNAL_ACCESS_CREATE);
        if (status < 0) {
                mlog_errno(status);
                goto bail;
        }
        memset(new_bh->b_data, 0, osb->sb->s_blocksize);

        de = (struct ocfs2_dir_entry *) new_bh->b_data;
        de->inode = cpu_to_le64(OCFS2_I(inode)->ip_blkno);
        de->name_len = 1;
        de->rec_len =
                cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len));
        strcpy(de->name, ".");
        ocfs2_set_de_type(de, S_IFDIR);
        de = (struct ocfs2_dir_entry *) ((char *)de + le16_to_cpu(de->rec_len));
        de->inode = cpu_to_le64(OCFS2_I(parent)->ip_blkno);
        de->rec_len = cpu_to_le16(inode->i_sb->s_blocksize -
                                  OCFS2_DIR_REC_LEN(1));
        de->name_len = 2;
        strcpy(de->name, "..");
        ocfs2_set_de_type(de, S_IFDIR);

        status = ocfs2_journal_dirty(handle, new_bh);
        if (status < 0) {
                mlog_errno(status);
                goto bail;
        }

        i_size_write(inode, inode->i_sb->s_blocksize);
        inode->i_nlink = 2;
        inode->i_blocks = ocfs2_align_bytes_to_sectors(inode->i_sb->s_blocksize);
        status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
        if (status < 0) {
                mlog_errno(status);
                goto bail;
        }

        status = 0;
bail:
        if (new_bh)
                brelse(new_bh);

        mlog_exit(status);
        return status;
}

static int ocfs2_mknod(struct inode *dir,
                       struct dentry *dentry,
                       int mode,
                       dev_t dev)
{
        int status = 0;
        struct buffer_head *parent_fe_bh = NULL;
        struct ocfs2_journal_handle *handle = NULL;
        struct ocfs2_super *osb;
        struct ocfs2_dinode *dirfe;
        struct buffer_head *new_fe_bh = NULL;
        struct buffer_head *de_bh = NULL;
        struct inode *inode = NULL;
        struct ocfs2_alloc_context *inode_ac = NULL;
        struct ocfs2_alloc_context *data_ac = NULL;

        mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode,
                   (unsigned long)dev, dentry->d_name.len,
                   dentry->d_name.name);

        /* get our super block */
        osb = OCFS2_SB(dir->i_sb);

        handle = ocfs2_alloc_handle(osb);
        if (handle == NULL) {
                status = -ENOMEM;
                mlog_errno(status);
                goto leave;
        }

        status = ocfs2_meta_lock(dir, handle, &parent_fe_bh, 1);
        if (status < 0) {
                if (status != -ENOENT)
                        mlog_errno(status);
                goto leave;
        }

        if (S_ISDIR(mode) && (dir->i_nlink >= OCFS2_LINK_MAX)) {
                status = -EMLINK;
                goto leave;
        }

        dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
        if (!dirfe->i_links_count) {
                /* can't make a file in a deleted directory. */
                status = -ENOENT;
                goto leave;
        }

        status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
                                           dentry->d_name.len);
        if (status)
                goto leave;

        /* get a spot inside the dir. */
        status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
                                              dentry->d_name.name,
                                              dentry->d_name.len, &de_bh);
        if (status < 0) {
                mlog_errno(status);
                goto leave;
        }

        /* reserve an inode spot */
        status = ocfs2_reserve_new_inode(osb, handle, &inode_ac);
        if (status < 0) {
                if (status != -ENOSPC)
                        mlog_errno(status);
                goto leave;
        }

        /* are we making a directory? If so, reserve a cluster for his
         * 1st extent. */
        if (S_ISDIR(mode)) {
                status = ocfs2_reserve_clusters(osb, handle, 1, &data_ac);
                if (status < 0) {
                        if (status != -ENOSPC)
                                mlog_errno(status);
                        goto leave;
                }
        }

        handle = ocfs2_start_trans(osb, handle, OCFS2_MKNOD_CREDITS);
        if (IS_ERR(handle)) {
                status = PTR_ERR(handle);
                handle = NULL;
                mlog_errno(status);
                goto leave;
        }

        /* do the real work now. */
        status = ocfs2_mknod_locked(osb, dir, dentry, mode, dev,
                                    &new_fe_bh, parent_fe_bh, handle,
                                    &inode, inode_ac);
        if (status < 0) {
                mlog_errno(status);
                goto leave;
        }

        if (S_ISDIR(mode)) {
                status = ocfs2_fill_new_dir(osb, handle, dir, inode,
                                            new_fe_bh, data_ac);
                if (status < 0) {
                        mlog_errno(status);
                        goto leave;
                }

                status = ocfs2_journal_access(handle, dir, parent_fe_bh,
                                              OCFS2_JOURNAL_ACCESS_WRITE);
                if (status < 0) {
                        mlog_errno(status);
                        goto leave;
                }
                le16_add_cpu(&dirfe->i_links_count, 1);
                status = ocfs2_journal_dirty(handle, parent_fe_bh);
                if (status < 0) {
                        mlog_errno(status);
                        goto leave;
                }
                dir->i_nlink++;
        }

        status = ocfs2_add_entry(handle, dentry, inode,
                                 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
                                 de_bh);
        if (status < 0) {
                mlog_errno(status);
                goto leave;
        }

        status = ocfs2_dentry_attach_lock(dentry, inode,
                                          OCFS2_I(dir)->ip_blkno);
        if (status) {
                mlog_errno(status);
                goto leave;
        }

        insert_inode_hash(inode);
        dentry->d_op = &ocfs2_dentry_ops;
        d_instantiate(dentry, inode);
        status = 0;
leave:
        if (handle)
                ocfs2_commit_trans(handle);

        if (status == -ENOSPC)
                mlog(0, "Disk is full\n");

        if (new_fe_bh)
                brelse(new_fe_bh);

        if (de_bh)
                brelse(de_bh);

        if (parent_fe_bh)
                brelse(parent_fe_bh);

        if ((status < 0) && inode)
                iput(inode);

        if (inode_ac)
                ocfs2_free_alloc_context(inode_ac);

        if (data_ac)
                ocfs2_free_alloc_context(data_ac);

        mlog_exit(status);

        return status;
}

static int ocfs2_mknod_locked(struct ocfs2_super *osb,
                              struct inode *dir,
                              struct dentry *dentry, int mode,
                              dev_t dev,
                              struct buffer_head **new_fe_bh,
                              struct buffer_head *parent_fe_bh,
                              struct ocfs2_journal_handle *handle,
                              struct inode **ret_inode,
                              struct ocfs2_alloc_context *inode_ac)
{
        int status = 0;
        struct ocfs2_dinode *fe = NULL;
        struct ocfs2_extent_list *fel;
        u64 fe_blkno = 0;
        u16 suballoc_bit;
        struct inode *inode = NULL;

        mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode,
                   (unsigned long)dev, dentry->d_name.len,
                   dentry->d_name.name);

        *new_fe_bh = NULL;
        *ret_inode = NULL;

        status = ocfs2_claim_new_inode(osb, handle, inode_ac, &suballoc_bit,
                                       &fe_blkno);
        if (status < 0) {
                mlog_errno(status);
                goto leave;
        }

        inode = new_inode(dir->i_sb);
        if (IS_ERR(inode)) {
                status = PTR_ERR(inode);
                mlog(ML_ERROR, "new_inode failed!\n");
                goto leave;
        }

        /* populate as many fields early on as possible - many of
         * these are used by the support functions here and in
         * callers. */
        inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
        OCFS2_I(inode)->ip_blkno = fe_blkno;
        if (S_ISDIR(mode))
                inode->i_nlink = 2;
        else
                inode->i_nlink = 1;
        inode->i_mode = mode;
        spin_lock(&osb->osb_lock);
        inode->i_generation = osb->s_next_generation++;
        spin_unlock(&osb->osb_lock);

        *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
        if (!*new_fe_bh) {
                status = -EIO;
                mlog_errno(status);
                goto leave;
        }
        ocfs2_set_new_buffer_uptodate(inode, *new_fe_bh);

        status = ocfs2_journal_access(handle, inode, *new_fe_bh,
                                      OCFS2_JOURNAL_ACCESS_CREATE);
        if (status < 0) {
                mlog_errno(status);
                goto leave;
        }

        fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
        memset(fe, 0, osb->sb->s_blocksize);

        fe->i_generation = cpu_to_le32(inode->i_generation);
        fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
        fe->i_blkno = cpu_to_le64(fe_blkno);
        fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
        fe->i_suballoc_slot = cpu_to_le16(osb->slot_num);
        fe->i_uid = cpu_to_le32(current->fsuid);
        if (dir->i_mode & S_ISGID) {
                fe->i_gid = cpu_to_le32(dir->i_gid);
                if (S_ISDIR(mode))
                        mode |= S_ISGID;
        } else
                fe->i_gid = cpu_to_le32(current->fsgid);
        fe->i_mode = cpu_to_le16(mode);
        if (S_ISCHR(mode) || S_ISBLK(mode))
                fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));

        fe->i_links_count = cpu_to_le16(inode->i_nlink);

        fe->i_last_eb_blk = 0;
        strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
        le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
        fe->i_atime = fe->i_ctime = fe->i_mtime =
                cpu_to_le64(CURRENT_TIME.tv_sec);
        fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
                cpu_to_le32(CURRENT_TIME.tv_nsec);
        fe->i_dtime = 0;

        fel = &fe->id2.i_list;
        fel->l_tree_depth = 0;
        fel->l_next_free_rec = 0;
        fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));

        status = ocfs2_journal_dirty(handle, *new_fe_bh);
        if (status < 0) {
                mlog_errno(status);
                goto leave;
        }

        if (ocfs2_populate_inode(inode, fe, 1) < 0) {
                mlog(ML_ERROR, "populate inode failed! bh->b_blocknr=%llu, "
                     "i_blkno=%llu, i_ino=%lu\n",
                     (unsigned long long) (*new_fe_bh)->b_blocknr,
                     (unsigned long long)fe->i_blkno, inode->i_ino);
                BUG();
        }

        ocfs2_inode_set_new(osb, inode);
        status = ocfs2_create_new_inode_locks(inode);
        if (status < 0)
                mlog_errno(status);

        status = 0; /* error in ocfs2_create_new_inode_locks is not
                     * critical */

        *ret_inode = inode;
leave:
        if (status < 0) {
                if (*new_fe_bh) {
                        brelse(*new_fe_bh);
                        *new_fe_bh = NULL;
                }
                if (inode)
                        iput(inode);
        }

        mlog_exit(status);
        return status;
}

static int ocfs2_mkdir(struct inode *dir,
                       struct dentry *dentry,
                       int mode)
{
        int ret;

        mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
                   dentry->d_name.len, dentry->d_name.name);
        ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
        mlog_exit(ret);

        return ret;
}

static int ocfs2_create(struct inode *dir,
                        struct dentry *dentry,
                        int mode,
                        struct nameidata *nd)
{
        int ret;

        mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
                   dentry->d_name.len, dentry->d_name.name);
        ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
        mlog_exit(ret);

        return ret;
}

static int ocfs2_link(struct dentry *old_dentry,
                      struct inode *dir,
                      struct dentry *dentry)
{
        struct ocfs2_journal_handle *handle = NULL;
        struct inode *inode = old_dentry->d_inode;
        int err;
        struct buffer_head *fe_bh = NULL;
        struct buffer_head *parent_fe_bh = NULL;
        struct buffer_head *de_bh = NULL;
        struct ocfs2_dinode *fe = NULL;
        struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);

        mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino,
                   old_dentry->d_name.len, old_dentry->d_name.name,
                   dentry->d_name.len, dentry->d_name.name);

        if (S_ISDIR(inode->i_mode)) {
                err = -EPERM;
                goto bail;
        }

        handle = ocfs2_alloc_handle(osb);
        if (handle == NULL) {
                err = -ENOMEM;
                goto bail;
        }

        err = ocfs2_meta_lock(dir, handle, &parent_fe_bh, 1);
        if (err < 0) {
                if (err != -ENOENT)
                        mlog_errno(err);
                goto bail;
        }

        if (!dir->i_nlink) {
                err = -ENOENT;
                goto bail;
        }

        err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
                                        dentry->d_name.len);
        if (err)
                goto bail;

        err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
                                           dentry->d_name.name,
                                           dentry->d_name.len, &de_bh);
        if (err < 0) {
                mlog_errno(err);
                goto bail;
        }

        err = ocfs2_meta_lock(inode, handle, &fe_bh, 1);
        if (err < 0) {
                if (err != -ENOENT)
                        mlog_errno(err);
                goto bail;
        }

        fe = (struct ocfs2_dinode *) fe_bh->b_data;
        if (le16_to_cpu(fe->i_links_count) >= OCFS2_LINK_MAX) {
                err = -EMLINK;
                goto bail;
        }

        handle = ocfs2_start_trans(osb, handle, OCFS2_LINK_CREDITS);
        if (IS_ERR(handle)) {
                err = PTR_ERR(handle);
                handle = NULL;
                mlog_errno(err);
                goto bail;
        }

        err = ocfs2_journal_access(handle, inode, fe_bh,
                                   OCFS2_JOURNAL_ACCESS_WRITE);
        if (err < 0) {
                mlog_errno(err);
                goto bail;
        }

        inode->i_nlink++;
        inode->i_ctime = CURRENT_TIME;
        fe->i_links_count = cpu_to_le16(inode->i_nlink);
        fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
        fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);

        err = ocfs2_journal_dirty(handle, fe_bh);
        if (err < 0) {
                le16_add_cpu(&fe->i_links_count, -1);
                drop_nlink(inode);
                mlog_errno(err);
                goto bail;
        }

        err = ocfs2_add_entry(handle, dentry, inode,
                              OCFS2_I(inode)->ip_blkno,
                              parent_fe_bh, de_bh);
        if (err) {
                le16_add_cpu(&fe->i_links_count, -1);
                drop_nlink(inode);
                mlog_errno(err);
                goto bail;
        }

        err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
        if (err) {
                mlog_errno(err);
                goto bail;
        }

        atomic_inc(&inode->i_count);
        dentry->d_op = &ocfs2_dentry_ops;
        d_instantiate(dentry, inode);
bail:
        if (handle)
                ocfs2_commit_trans(handle);
        if (de_bh)
                brelse(de_bh);
        if (fe_bh)
                brelse(fe_bh);
        if (parent_fe_bh)
                brelse(parent_fe_bh);

        mlog_exit(err);

        return err;
}

/*
 * Takes and drops an exclusive lock on the given dentry. This will
 * force other nodes to drop it.
 */
static int ocfs2_remote_dentry_delete(struct dentry *dentry)
{
        int ret;

        ret = ocfs2_dentry_lock(dentry, 1);
        if (ret)
                mlog_errno(ret);
        else
                ocfs2_dentry_unlock(dentry, 1);

        return ret;
}

static int ocfs2_unlink(struct inode *dir,
                        struct dentry *dentry)
{
        int status;
        unsigned int saved_nlink = 0;
        struct inode *inode = dentry->d_inode;
        struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
        u64 blkno;
        struct ocfs2_dinode *fe = NULL;
        struct buffer_head *fe_bh = NULL;
        struct buffer_head *parent_node_bh = NULL;
        struct ocfs2_journal_handle *handle = NULL;
        struct ocfs2_dir_entry *dirent = NULL;
        struct buffer_head *dirent_bh = NULL;
        char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
        struct buffer_head *orphan_entry_bh = NULL;

        mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
                   dentry->d_name.len, dentry->d_name.name);

        BUG_ON(dentry->d_parent->d_inode != dir);

        mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno);

        if (inode == osb->root_inode) {
                mlog(0, "Cannot delete the root directory\n");
                status = -EPERM;
                goto leave;
        }

        handle = ocfs2_alloc_handle(osb);
        if (handle == NULL) {
                status = -ENOMEM;
                mlog_errno(status);
                goto leave;
        }

        status = ocfs2_meta_lock(dir, handle, &parent_node_bh, 1);
        if (status < 0) {
                if (status != -ENOENT)
                        mlog_errno(status);
                goto leave;
        }

        status = ocfs2_find_files_on_disk(dentry->d_name.name,
                                          dentry->d_name.len, &blkno,
                                          dir, &dirent_bh, &dirent);
        if (status < 0) {
                if (status != -ENOENT)
                        mlog_errno(status);
                goto leave;
        }

        if (OCFS2_I(inode)->ip_blkno != blkno) {
                status = -ENOENT;

                mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n",
                     (unsigned long long)OCFS2_I(inode)->ip_blkno,
                     (unsigned long long)blkno, OCFS2_I(inode)->ip_flags);
                goto leave;
        }

        status = ocfs2_meta_lock(inode, handle, &fe_bh, 1);
        if (status < 0) {
                if (status != -ENOENT)
                        mlog_errno(status);
                goto leave;
        }

        if (S_ISDIR(inode->i_mode)) {
                if (!ocfs2_empty_dir(inode)) {
                        status = -ENOTEMPTY;
                        goto leave;
                } else if (inode->i_nlink != 2) {
                        status = -ENOTEMPTY;
                        goto leave;
                }
        }

        /* There are still a few steps left until we can consider the
         * unlink to have succeeded. Save off nlink here before
         * modification so we can set it back in case we hit an issue
         * before commit. */
        saved_nlink = inode->i_nlink;
        if (S_ISDIR(inode->i_mode))
                inode->i_nlink = 0;
        else
                inode->i_nlink--;

        status = ocfs2_remote_dentry_delete(dentry);
        if (status < 0) {
                /* This vote should succeed under all normal
                 * circumstances. */
                mlog_errno(status);
                goto leave;
        }

        if (!inode->i_nlink) {
                status = ocfs2_prepare_orphan_dir(osb, handle, inode,
                                                  orphan_name,
                                                  &orphan_entry_bh);
                if (status < 0) {
                        mlog_errno(status);
                        goto leave;
                }
        }

        handle = ocfs2_start_trans(osb, handle, OCFS2_UNLINK_CREDITS);
        if (IS_ERR(handle)) {
                status = PTR_ERR(handle);
                handle = NULL;
                mlog_errno(status);
                goto leave;
        }

        status = ocfs2_journal_access(handle, inode, fe_bh,
                                      OCFS2_JOURNAL_ACCESS_WRITE);
        if (status < 0) {
                mlog_errno(status);
                goto leave;
        }

        fe = (struct ocfs2_dinode *) fe_bh->b_data;

        if (!inode->i_nlink) {
                status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name,
                                          orphan_entry_bh);
                if (status < 0) {
                        mlog_errno(status);
                        goto leave;
                }
        }

        /* delete the name from the parent dir */
        status = ocfs2_delete_entry(handle, dir, dirent, dirent_bh);
        if (status < 0) {
                mlog_errno(status);
                goto leave;
        }

        /* We can set nlink on the dinode now. clear the saved version
         * so that it doesn't get set later. */
        fe->i_links_count = cpu_to_le16(inode->i_nlink);
        saved_nlink = 0;

        status = ocfs2_journal_dirty(handle, fe_bh);
        if (status < 0) {
                mlog_errno(status);
                goto leave;
        }

        if (S_ISDIR(inode->i_mode)) {
                dir->i_nlink--;
                status = ocfs2_mark_inode_dirty(handle, dir,
                                                parent_node_bh);
                if (status < 0) {
                        mlog_errno(status);
                        dir->i_nlink++;
                }
        }

leave:
        if (status < 0 && saved_nlink)
                inode->i_nlink = saved_nlink;

        if (handle)
                ocfs2_commit_trans(handle);

        if (fe_bh)
                brelse(fe_bh);

        if (dirent_bh)
                brelse(dirent_bh);

        if (parent_node_bh)
                brelse(parent_node_bh);

        if (orphan_entry_bh)
                brelse(orphan_entry_bh);

        mlog_exit(status);

        return status;
}

/*
 * The only place this should be used is rename!
 * if they have the same id, then the 1st one is the only one locked.
 */
static int ocfs2_double_lock(struct ocfs2_super *osb,
                             struct ocfs2_journal_handle *handle,
                             struct buffer_head **bh1,
                             struct inode *inode1,
                             struct buffer_head **bh2,
                             struct inode *inode2)
{
        int status;
        struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
        struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
        struct buffer_head **tmpbh;
        struct inode *tmpinode;

        mlog_entry("(inode1 = %llu, inode2 = %llu)\n",
                   (unsigned long long)oi1->ip_blkno,
                   (unsigned long long)oi2->ip_blkno);

        BUG_ON(!handle);

        if (*bh1)
                *bh1 = NULL;
        if (*bh2)
                *bh2 = NULL;

        /* we always want to lock the one with the lower lockid first. */
        if (oi1->ip_blkno != oi2->ip_blkno) {
                if (oi1->ip_blkno < oi2->ip_blkno) {
                        /* switch id1 and id2 around */
                        mlog(0, "switching them around...\n");
                        tmpbh = bh2;
                        bh2 = bh1;
                        bh1 = tmpbh;

                        tmpinode = inode2;
                        inode2 = inode1;
                        inode1 = tmpinode;
                }
                /* lock id2 */
                status = ocfs2_meta_lock(inode2, handle, bh2, 1);
                if (status < 0) {
                        if (status != -ENOENT)
                                mlog_errno(status);
                        goto bail;
                }
        }
        /* lock id1 */
        status = ocfs2_meta_lock(inode1, handle, bh1, 1);
        if (status < 0) {
                if (status != -ENOENT)
                        mlog_errno(status);
                goto bail;
        }
bail:
        mlog_exit(status);
        return status;
}

#define PARENT_INO(buffer) \
        ((struct ocfs2_dir_entry *) \
         ((char *)buffer + \
          le16_to_cpu(((struct ocfs2_dir_entry *)buffer)->rec_len)))->inode

static int ocfs2_rename(struct inode *old_dir,
                        struct dentry *old_dentry,
                        struct inode *new_dir,
                        struct dentry *new_dentry)
{
        int status = 0, rename_lock = 0;
        struct inode *old_inode = old_dentry->d_inode;
        struct inode *new_inode = new_dentry->d_inode;
        struct ocfs2_dinode *newfe = NULL;
        char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
        struct buffer_head *orphan_entry_bh = NULL;
        struct buffer_head *newfe_bh = NULL;
        struct buffer_head *insert_entry_bh = NULL;
        struct ocfs2_super *osb = NULL;
        u64 newfe_blkno;
        struct ocfs2_journal_handle *handle = NULL;
        struct buffer_head *old_dir_bh = NULL;
        struct buffer_head *new_dir_bh = NULL;
        struct ocfs2_dir_entry *old_de = NULL, *new_de = NULL; // dirent for old_dentry
                                                               // and new_dentry
        struct buffer_head *new_de_bh = NULL, *old_de_bh = NULL; // bhs for above
        struct buffer_head *old_inode_de_bh = NULL; // if old_dentry is a dir,
                                                    // this is the 1st dirent bh
        nlink_t old_dir_nlink = old_dir->i_nlink, new_dir_nlink = new_dir->i_nlink;

        /* At some point it might be nice to break this function up a
         * bit. */

        mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n",
                   old_dir, old_dentry, new_dir, new_dentry,
                   old_dentry->d_name.len, old_dentry->d_name.name,
                   new_dentry->d_name.len, new_dentry->d_name.name);

        osb = OCFS2_SB(old_dir->i_sb);

        if (new_inode) {
                if (!igrab(new_inode))
                        BUG();
        }

        if (atomic_read(&old_dentry->d_count) > 2) {
                shrink_dcache_parent(old_dentry);
                if (atomic_read(&old_dentry->d_count) > 2) {
                        status = -EBUSY;
                        goto bail;
                }
        }

        /* Assume a directory heirarchy thusly:
         * a/b/c
         * a/d
         * a,b,c, and d are all directories.
         *
         * from cwd of 'a' on both nodes:
         * node1: mv b/c d
         * node2: mv d   b/c
         *
         * And that's why, just like the VFS, we need a file system
         * rename lock. */
        if (old_dentry != new_dentry) {
                status = ocfs2_rename_lock(osb);
                if (status < 0) {
                        mlog_errno(status);
                        goto bail;
                }
                rename_lock = 1;
        }

        handle = ocfs2_alloc_handle(osb);
        if (handle == NULL) {
                status = -ENOMEM;
                mlog_errno(status);
                goto bail;
        }

        /* if old and new are the same, this'll just do one lock. */
        status = ocfs2_double_lock(osb, handle,
                                  &old_dir_bh, old_dir,
                                  &new_dir_bh, new_dir);
        if (status < 0) {
                mlog_errno(status);
                goto bail;
        }

        /* make sure both dirs have bhs
         * get an extra ref on old_dir_bh if old==new */
        if (!new_dir_bh) {
                if (old_dir_bh) {
                        new_dir_bh = old_dir_bh;
                        get_bh(new_dir_bh);
                } else {
                        mlog(ML_ERROR, "no old_dir_bh!\n");
                        status = -EIO;
                        goto bail;
                }
        }

        /*
         * Though we don't require an inode meta data update if
         * old_inode is not a directory, we lock anyway here to ensure
         * the vote thread on other nodes won't have to concurrently
         * downconvert the inode and the dentry locks.
         */
        status = ocfs2_meta_lock(old_inode, handle, NULL, 1);
        if (status < 0) {
                if (status != -ENOENT)
                        mlog_errno(status);
                goto bail;
        }

        status = ocfs2_remote_dentry_delete(old_dentry);
        if (status < 0) {
                mlog_errno(status);
                goto bail;
        }

        if (S_ISDIR(old_inode->i_mode)) {
                status = -EIO;
                old_inode_de_bh = ocfs2_bread(old_inode, 0, &status, 0);
                if (!old_inode_de_bh)
                        goto bail;

                status = -EIO;
                if (le64_to_cpu(PARENT_INO(old_inode_de_bh->b_data)) !=
                    OCFS2_I(old_dir)->ip_blkno)
                        goto bail;
                status = -EMLINK;
                if (!new_inode && new_dir!=old_dir &&
                    new_dir->i_nlink >= OCFS2_LINK_MAX)
                        goto bail;
        }

        status = -ENOENT;
        old_de_bh = ocfs2_find_entry(old_dentry->d_name.name,
                                     old_dentry->d_name.len,
                                     old_dir, &old_de);
        if (!old_de_bh)
                goto bail;

        /*
         *  Check for inode number is _not_ due to possible IO errors.
         *  We might rmdir the source, keep it as pwd of some process
         *  and merrily kill the link to whatever was created under the
         *  same name. Goodbye sticky bit ;-<
         */
        if (le64_to_cpu(old_de->inode) != OCFS2_I(old_inode)->ip_blkno)
                goto bail;

        /* check if the target already exists (in which case we need
         * to delete it */
        status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
                                          new_dentry->d_name.len,
                                          &newfe_blkno, new_dir, &new_de_bh,
                                          &new_de);
        /* The only error we allow here is -ENOENT because the new
         * file not existing is perfectly valid. */
        if ((status < 0) && (status != -ENOENT)) {
                /* If we cannot find the file specified we should just */
                /* return the error... */
                mlog_errno(status);
                goto bail;
        }

        if (!new_de && new_inode)
                mlog(ML_ERROR, "inode %lu does not exist in it's parent "
                     "directory!", new_inode->i_ino);

        /* In case we need to overwrite an existing file, we blow it
         * away first */
        if (new_de) {
                /* VFS didn't think there existed an inode here, but
                 * someone else in the cluster must have raced our
                 * rename to create one. Today we error cleanly, in
                 * the future we should consider calling iget to build
                 * a new struct inode for this entry. */
                if (!new_inode) {
                        status = -EACCES;

                        mlog(0, "We found an inode for name %.*s but VFS "
                             "didn't give us one.\n", new_dentry->d_name.len,
                             new_dentry->d_name.name);
                        goto bail;
                }

                if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
                        status = -EACCES;

                        mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n",
                             (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
                             (unsigned long long)newfe_blkno,
                             OCFS2_I(new_inode)->ip_flags);
                        goto bail;
                }

                status = ocfs2_meta_lock(new_inode, handle, &newfe_bh, 1);
                if (status < 0) {
                        if (status != -ENOENT)
                                mlog_errno(status);
                        goto bail;
                }

                status = ocfs2_remote_dentry_delete(new_dentry);
                if (status < 0) {
                        mlog_errno(status);
                        goto bail;
                }

                newfe = (struct ocfs2_dinode *) newfe_bh->b_data;

                mlog(0, "aha rename over existing... new_de=%p new_blkno=%llu "
                     "newfebh=%p bhblocknr=%llu\n", new_de,
                     (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
                     (unsigned long long)newfe_bh->b_blocknr : 0ULL);

                if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
                        status = ocfs2_prepare_orphan_dir(osb, handle,
                                                          new_inode,
                                                          orphan_name,
                                                          &orphan_entry_bh);
                        if (status < 0) {
                                mlog_errno(status);
                                goto bail;
                        }
                }
        } else {
                BUG_ON(new_dentry->d_parent->d_inode != new_dir);

                status = ocfs2_check_dir_for_entry(new_dir,
                                                   new_dentry->d_name.name,
                                                   new_dentry->d_name.len);
                if (status)
                        goto bail;

                status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
                                                      new_dentry->d_name.name,
                                                      new_dentry->d_name.len,
                                                      &insert_entry_bh);
                if (status < 0) {
                        mlog_errno(status);
                        goto bail;
                }
        }

        handle = ocfs2_start_trans(osb, handle, OCFS2_RENAME_CREDITS);
        if (IS_ERR(handle)) {
                status = PTR_ERR(handle);
                handle = NULL;
                mlog_errno(status);
                goto bail;
        }

        if (new_de) {
                if (S_ISDIR(new_inode->i_mode)) {
                        if (!ocfs2_empty_dir(new_inode) ||
                            new_inode->i_nlink != 2) {
                                status = -ENOTEMPTY;
                                goto bail;
                        }
                }
                status = ocfs2_journal_access(handle, new_inode, newfe_bh,
                                              OCFS2_JOURNAL_ACCESS_WRITE);
                if (status < 0) {
                        mlog_errno(status);
                        goto bail;
                }

                if (S_ISDIR(new_inode->i_mode) ||
                    (newfe->i_links_count == cpu_to_le16(1))){
                        status = ocfs2_orphan_add(osb, handle, new_inode,
                                                  newfe, orphan_name,
                                                  orphan_entry_bh);
                        if (status < 0) {
                                mlog_errno(status);
                                goto bail;
                        }
                }

                /* change the dirent to point to the correct inode */
                status = ocfs2_journal_access(handle, new_dir, new_de_bh,
                                              OCFS2_JOURNAL_ACCESS_WRITE);
                if (status < 0) {
                        mlog_errno(status);
                        goto bail;
                }
                new_de->inode = cpu_to_le64(OCFS2_I(old_inode)->ip_blkno);
                new_de->file_type = old_de->file_type;
                new_dir->i_version++;
                status = ocfs2_journal_dirty(handle, new_de_bh);
                if (status < 0) {
                        mlog_errno(status);
                        goto bail;
                }

                if (S_ISDIR(new_inode->i_mode))
                        newfe->i_links_count = 0;
                else
                        le16_add_cpu(&newfe->i_links_count, -1);

                status = ocfs2_journal_dirty(handle, newfe_bh);
                if (status < 0) {
                        mlog_errno(status);
                        goto bail;
                }
        } else {
                /* if the name was not found in new_dir, add it now */
                status = ocfs2_add_entry(handle, new_dentry, old_inode,
                                         OCFS2_I(old_inode)->ip_blkno,
                                         new_dir_bh, insert_entry_bh);
        }

        old_inode->i_ctime = CURRENT_TIME;
        mark_inode_dirty(old_inode);

        /* now that the name has been added to new_dir, remove the old name */
        status = ocfs2_delete_entry(handle, old_dir, old_de, old_de_bh);
        if (status < 0) {
                mlog_errno(status);
                goto bail;
        }

        if (new_inode) {
                new_inode->i_nlink--;
                new_inode->i_ctime = CURRENT_TIME;
        }
        old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
        if (old_inode_de_bh) {
                status = ocfs2_journal_access(handle, old_inode,
                                             old_inode_de_bh,
                                             OCFS2_JOURNAL_ACCESS_WRITE);
                PARENT_INO(old_inode_de_bh->b_data) =
                        cpu_to_le64(OCFS2_I(new_dir)->ip_blkno);
                status = ocfs2_journal_dirty(handle, old_inode_de_bh);
                old_dir->i_nlink--;
                if (new_inode) {
                        new_inode->i_nlink--;
                } else {
                        new_dir->i_nlink++;
                        mark_inode_dirty(new_dir);
                }
        }
        mark_inode_dirty(old_dir);
        if (new_inode)
                mark_inode_dirty(new_inode);

        if (old_dir != new_dir)
                if (new_dir_nlink != new_dir->i_nlink) {
                        if (!new_dir_bh) {
                                mlog(ML_ERROR, "need to change nlink for new "
                                     "dir %llu from %d to %d but bh is NULL\n",
                                     (unsigned long long)OCFS2_I(new_dir)->ip_blkno,
                                     (int)new_dir_nlink, new_dir->i_nlink);
                        } else {
                                struct ocfs2_dinode *fe;
                                status = ocfs2_journal_access(handle,
                                                              new_dir,
                                                              new_dir_bh,
                                                              OCFS2_JOURNAL_ACCESS_WRITE);
                                fe = (struct ocfs2_dinode *) new_dir_bh->b_data;
                                fe->i_links_count = cpu_to_le16(new_dir->i_nlink);
                                status = ocfs2_journal_dirty(handle, new_dir_bh);
                        }
                }

        if (old_dir_nlink != old_dir->i_nlink) {
                if (!old_dir_bh) {
                        mlog(ML_ERROR, "need to change nlink for old dir "
                             "%llu from %d to %d but bh is NULL!\n",
                             (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
                             (int)old_dir_nlink, old_dir->i_nlink);
                } else {
                        struct ocfs2_dinode *fe;
                        status = ocfs2_journal_access(handle, old_dir,
                                                      old_dir_bh,
                                                      OCFS2_JOURNAL_ACCESS_WRITE);
                        fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
                        fe->i_links_count = cpu_to_le16(old_dir->i_nlink);
                        status = ocfs2_journal_dirty(handle, old_dir_bh);
                }
        }

        ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
        status = 0;
bail:
        if (rename_lock)
                ocfs2_rename_unlock(osb);

        if (handle)
                ocfs2_commit_trans(handle);

        if (new_inode)
                sync_mapping_buffers(old_inode->i_mapping);

        if (new_inode)
                iput(new_inode);
        if (newfe_bh)
                brelse(newfe_bh);
        if (old_dir_bh)
                brelse(old_dir_bh);
        if (new_dir_bh)
                brelse(new_dir_bh);
        if (new_de_bh)
                brelse(new_de_bh);
        if (old_de_bh)
                brelse(old_de_bh);
        if (old_inode_de_bh)
                brelse(old_inode_de_bh);
        if (orphan_entry_bh)
                brelse(orphan_entry_bh);
        if (insert_entry_bh)
                brelse(insert_entry_bh);

        mlog_exit(status);

        return status;
}

/*
 * we expect i_size = strlen(symname). Copy symname into the file
 * data, including the null terminator.
 */
static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
                                     struct ocfs2_journal_handle *handle,
                                     struct inode *inode,
                                     const char *symname)
{
        struct buffer_head **bhs = NULL;
        const char *c;
        struct super_block *sb = osb->sb;
        u64 p_blkno;
        int p_blocks;
        int virtual, blocks, status, i, bytes_left;

        bytes_left = i_size_read(inode) + 1;
        /* we can't trust i_blocks because we're actually going to
         * write i_size + 1 bytes. */
        blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;

        mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n",
                        (unsigned long long)inode->i_blocks,
                        i_size_read(inode), blocks);

        /* Sanity check -- make sure we're going to fit. */
        if (bytes_left >
            ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
                status = -EIO;
                mlog_errno(status);
                goto bail;
        }

        bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
        if (!bhs) {
                status = -ENOMEM;
                mlog_errno(status);
                goto bail;
        }

        status = ocfs2_extent_map_get_blocks(inode, 0, 1, &p_blkno,
                                             &p_blocks);
        if (status < 0) {
                mlog_errno(status);
                goto bail;
        }

        /* links can never be larger than one cluster so we know this
         * is all going to be contiguous, but do a sanity check
         * anyway. */
        if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
                status = -EIO;
                mlog_errno(status);
                goto bail;
        }

        virtual = 0;
        while(bytes_left > 0) {
                c = &symname[virtual * sb->s_blocksize];

                bhs[virtual] = sb_getblk(sb, p_blkno);
                if (!bhs[virtual]) {
                        status = -ENOMEM;
                        mlog_errno(status);
                        goto bail;
                }
                ocfs2_set_new_buffer_uptodate(inode, bhs[virtual]);

                status = ocfs2_journal_access(handle, inode, bhs[virtual],
                                              OCFS2_JOURNAL_ACCESS_CREATE);
                if (status < 0) {
                        mlog_errno(status);
                        goto bail;
                }

                memset(bhs[virtual]->b_data, 0, sb->s_blocksize);

                memcpy(bhs[virtual]->b_data, c,
                       (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
                       bytes_left);

                status = ocfs2_journal_dirty(handle, bhs[virtual]);
                if (status < 0) {
                        mlog_errno(status);
                        goto bail;
                }

                virtual++;
                p_blkno++;
                bytes_left -= sb->s_blocksize;
        }

        status = 0;
bail:

        if (bhs) {
                for(i = 0; i < blocks; i++)
                        if (bhs[i])
                                brelse(bhs[i]);
                kfree(bhs);
        }

        mlog_exit(status);
        return status;
}

static int ocfs2_symlink(struct inode *dir,
                         struct dentry *dentry,
                         const char *symname)
{
        int status, l, credits;
        u64 newsize;
        struct ocfs2_super *osb = NULL;
        struct inode *inode = NULL;
        struct super_block *sb;
        struct buffer_head *new_fe_bh = NULL;
        struct buffer_head *de_bh = NULL;
        struct buffer_head *parent_fe_bh = NULL;
        struct ocfs2_dinode *fe = NULL;
        struct ocfs2_dinode *dirfe;
        struct ocfs2_journal_handle *handle = NULL;
        struct ocfs2_alloc_context *inode_ac = NULL;
        struct ocfs2_alloc_context *data_ac = NULL;

        mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir,
                   dentry, symname, dentry->d_name.len, dentry->d_name.name);

        sb = dir->i_sb;
        osb = OCFS2_SB(sb);

        l = strlen(symname) + 1;

        credits = ocfs2_calc_symlink_credits(sb);

        handle = ocfs2_alloc_handle(osb);
        if (handle == NULL) {
                status = -ENOMEM;
                mlog_errno(status);
                goto bail;
        }

        /* lock the parent directory */
        status = ocfs2_meta_lock(dir, handle, &parent_fe_bh, 1);
        if (status < 0) {
                if (status != -ENOENT)
                        mlog_errno(status);
                goto bail;
        }

        dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
        if (!dirfe->i_links_count) {
                /* can't make a file in a deleted directory. */
                status = -ENOENT;
                goto bail;
        }

        status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
                                           dentry->d_name.len);
        if (status)
                goto bail;

        status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
                                              dentry->d_name.name,
                                              dentry->d_name.len, &de_bh);
        if (status < 0) {
                mlog_errno(status);
                goto bail;
        }

        status = ocfs2_reserve_new_inode(osb, handle, &inode_ac);
        if (status < 0) {
                if (status != -ENOSPC)
                        mlog_errno(status);
                goto bail;
        }

        /* don't reserve bitmap space for fast symlinks. */
        if (l > ocfs2_fast_symlink_chars(sb)) {
                status = ocfs2_reserve_clusters(osb, handle, 1, &data_ac);
                if (status < 0) {
                        if (status != -ENOSPC)
                                mlog_errno(status);
                        goto bail;
                }
        }

        handle = ocfs2_start_trans(osb, handle, credits);
        if (IS_ERR(handle)) {
                status = PTR_ERR(handle);
                handle = NULL;
                mlog_errno(status);
                goto bail;
        }

        status = ocfs2_mknod_locked(osb, dir, dentry,
                                    S_IFLNK | S_IRWXUGO, 0,
                                    &new_fe_bh, parent_fe_bh, handle,
                                    &inode, inode_ac);
        if (status < 0) {
                mlog_errno(status);
                goto bail;
        }

        fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
        inode->i_rdev = 0;
        newsize = l - 1;
        if (l > ocfs2_fast_symlink_chars(sb)) {
                inode->i_op = &ocfs2_symlink_inode_operations;
                status = ocfs2_do_extend_allocation(osb, inode, 1, new_fe_bh,
                                                    handle, data_ac, NULL,
                                                    NULL);
                if (status < 0) {
                        if (status != -ENOSPC && status != -EINTR) {
                                mlog(ML_ERROR,
                                     "Failed to extend file to %llu\n",
                                     (unsigned long long)newsize);
                                mlog_errno(status);
                                status = -ENOSPC;
                        }
                        goto bail;
                }
                i_size_write(inode, newsize);
                inode->i_blocks = ocfs2_align_bytes_to_sectors(newsize);
        } else {
                inode->i_op = &ocfs2_fast_symlink_inode_operations;
                memcpy((char *) fe->id2.i_symlink, symname, l);
                i_size_write(inode, newsize);
                inode->i_blocks = 0;
        }

        status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
        if (status < 0) {
                mlog_errno(status);
                goto bail;
        }

        if (!ocfs2_inode_is_fast_symlink(inode)) {
                status = ocfs2_create_symlink_data(osb, handle, inode,
                                                   symname);
                if (status < 0) {
                        mlog_errno(status);
                        goto bail;
                }
        }

        status = ocfs2_add_entry(handle, dentry, inode,
                                 le64_to_cpu(fe->i_blkno), parent_fe_bh,
                                 de_bh);
        if (status < 0) {
                mlog_errno(status);
                goto bail;
        }

        status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
        if (status) {
                mlog_errno(status);
                goto bail;
        }

        insert_inode_hash(inode);
        dentry->d_op = &ocfs2_dentry_ops;
        d_instantiate(dentry, inode);
bail:
        if (handle)
                ocfs2_commit_trans(handle);
        if (new_fe_bh)
                brelse(new_fe_bh);
        if (parent_fe_bh)
                brelse(parent_fe_bh);
        if (de_bh)
                brelse(de_bh);
        if (inode_ac)
                ocfs2_free_alloc_context(inode_ac);
        if (data_ac)
                ocfs2_free_alloc_context(data_ac);
        if ((status < 0) && inode)
                iput(inode);

        mlog_exit(status);

        return status;
}

int ocfs2_check_dir_entry(struct inode * dir,
                          struct ocfs2_dir_entry * de,
                          struct buffer_head * bh,
                          unsigned long offset)
{
        const char *error_msg = NULL;
        const int rlen = le16_to_cpu(de->rec_len);

        if (rlen < OCFS2_DIR_REC_LEN(1))
                error_msg = "rec_len is smaller than minimal";
        else if (rlen % 4 != 0)
                error_msg = "rec_len % 4 != 0";
        else if (rlen < OCFS2_DIR_REC_LEN(de->name_len))
                error_msg = "rec_len is too small for name_len";
        else if (((char *) de - bh->b_data) + rlen > dir->i_sb->s_blocksize)
                error_msg = "directory entry across blocks";

        if (error_msg != NULL)
                mlog(ML_ERROR, "bad entry in directory #%llu: %s - "
                     "offset=%lu, inode=%llu, rec_len=%d, name_len=%d\n",
                     (unsigned long long)OCFS2_I(dir)->ip_blkno, error_msg,
                     offset, (unsigned long long)le64_to_cpu(de->inode), rlen,
                     de->name_len);
        return error_msg == NULL ? 1 : 0;
}

/* we don't always have a dentry for what we want to add, so people
 * like orphan dir can call this instead.
 *
 * If you pass me insert_bh, I'll skip the search of the other dir
 * blocks and put the record in there.
 */
static int __ocfs2_add_entry(struct ocfs2_journal_handle *handle,
                             struct inode *dir,
                             const char *name, int namelen,
                             struct inode *inode, u64 blkno,
                             struct buffer_head *parent_fe_bh,
                             struct buffer_head *insert_bh)
{
        unsigned long offset;
        unsigned short rec_len;
        struct ocfs2_dir_entry *de, *de1;
        struct super_block *sb;
        int retval, status;

        mlog_entry_void();

        sb = dir->i_sb;

        if (!namelen)
                return -EINVAL;

        rec_len = OCFS2_DIR_REC_LEN(namelen);
        offset = 0;
        de = (struct ocfs2_dir_entry *) insert_bh->b_data;
        while (1) {
                BUG_ON((char *)de >= sb->s_blocksize + insert_bh->b_data);
                /* These checks should've already been passed by the
                 * prepare function, but I guess we can leave them
                 * here anyway. */
                if (!ocfs2_check_dir_entry(dir, de, insert_bh, offset)) {
                        retval = -ENOENT;
                        goto bail;
                }
                if (ocfs2_match(namelen, name, de)) {
                        retval = -EEXIST;
                        goto bail;
                }
                if (((le64_to_cpu(de->inode) == 0) &&
                     (le16_to_cpu(de->rec_len) >= rec_len)) ||
                    (le16_to_cpu(de->rec_len) >=
                     (OCFS2_DIR_REC_LEN(de->name_len) + rec_len))) {
                        status = ocfs2_journal_access(handle, dir, insert_bh,
                                                      OCFS2_JOURNAL_ACCESS_WRITE);
                        /* By now the buffer is marked for journaling */
                        offset += le16_to_cpu(de->rec_len);
                        if (le64_to_cpu(de->inode)) {
                                de1 = (struct ocfs2_dir_entry *)((char *) de +
                                        OCFS2_DIR_REC_LEN(de->name_len));
                                de1->rec_len =
                                        cpu_to_le16(le16_to_cpu(de->rec_len) -
                                        OCFS2_DIR_REC_LEN(de->name_len));
                                de->rec_len = cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len));
                                de = de1;
                        }
                        de->file_type = OCFS2_FT_UNKNOWN;
                        if (blkno) {
                                de->inode = cpu_to_le64(blkno);
                                ocfs2_set_de_type(de, inode->i_mode);
                        } else
                                de->inode = 0;
                        de->name_len = namelen;
                        memcpy(de->name, name, namelen);

                        dir->i_mtime = dir->i_ctime = CURRENT_TIME;
                        dir->i_version++;
                        status = ocfs2_journal_dirty(handle, insert_bh);
                        retval = 0;
                        goto bail;
                }
                offset += le16_to_cpu(de->rec_len);
                de = (struct ocfs2_dir_entry *) ((char *) de + le16_to_cpu(de->rec_len));
        }

        /* when you think about it, the assert above should prevent us
         * from ever getting here. */
        retval = -ENOSPC;
bail:

        mlog_exit(retval);
        return retval;
}


/*
 * ocfs2_delete_entry deletes a directory entry by merging it with the
 * previous entry
 */
static int ocfs2_delete_entry(struct ocfs2_journal_handle *handle,
                              struct inode *dir,
                              struct ocfs2_dir_entry *de_del,
                              struct buffer_head *bh)
{
        struct ocfs2_dir_entry *de, *pde;
        int i, status = -ENOENT;

        mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p)\n", handle, dir, de_del, bh);

        i = 0;
        pde = NULL;
        de = (struct ocfs2_dir_entry *) bh->b_data;
        while (i < bh->b_size) {
                if (!ocfs2_check_dir_entry(dir, de, bh, i)) {
                        status = -EIO;
                        mlog_errno(status);
                        goto bail;
                }
                if (de == de_del)  {
                        status = ocfs2_journal_access(handle, dir, bh,
                                                      OCFS2_JOURNAL_ACCESS_WRITE);
                        if (status < 0) {
                                status = -EIO;
                                mlog_errno(status);
                                goto bail;
                        }
                        if (pde)
                                pde->rec_len =
                                        cpu_to_le16(le16_to_cpu(pde->rec_len) +
                                                    le16_to_cpu(de->rec_len));
                        else
                                de->inode = 0;
                        dir->i_version++;
                        status = ocfs2_journal_dirty(handle, bh);
                        goto bail;
                }
                i += le16_to_cpu(de->rec_len);
                pde = de;
                de = (struct ocfs2_dir_entry *)((char *)de + le16_to_cpu(de->rec_len));
        }
bail:
        mlog_exit(status);
        return status;
}

/*
 * Returns 0 if not found, -1 on failure, and 1 on success
 */
static int inline ocfs2_search_dirblock(struct buffer_head *bh,
                                        struct inode *dir,
                                        const char *name, int namelen,
                                        unsigned long offset,
                                        struct ocfs2_dir_entry **res_dir)
{
        struct ocfs2_dir_entry *de;
        char *dlimit, *de_buf;
        int de_len;
        int ret = 0;

        mlog_entry_void();

        de_buf = bh->b_data;
        dlimit = de_buf + dir->i_sb->s_blocksize;

        while (de_buf < dlimit) {
                /* this code is executed quadratically often */
                /* do minimal checking `by hand' */

                de = (struct ocfs2_dir_entry *) de_buf;

                if (de_buf + namelen <= dlimit &&
                    ocfs2_match(namelen, name, de)) {
                        /* found a match - just to be sure, do a full check */
                        if (!ocfs2_check_dir_entry(dir, de, bh, offset)) {
                                ret = -1;
                                goto bail;
                        }
                        *res_dir = de;
                        ret = 1;
                        goto bail;
                }

                /* prevent looping on a bad block */
                de_len = le16_to_cpu(de->rec_len);
                if (de_len <= 0) {
                        ret = -1;
                        goto bail;
                }

                de_buf += de_len;
                offset += de_len;
        }

bail:
        mlog_exit(ret);
        return ret;
}

struct buffer_head *ocfs2_find_entry(const char *name, int namelen,
                                     struct inode *dir,
                                     struct ocfs2_dir_entry **res_dir)
{
        struct super_block *sb;
        struct buffer_head *bh_use[NAMEI_RA_SIZE];
        struct buffer_head *bh, *ret = NULL;
        unsigned long start, block, b;
        int ra_max = 0;         /* Number of bh's in the readahead
                                   buffer, bh_use[] */
        int ra_ptr = 0;         /* Current index into readahead
                                   buffer */
        int num = 0;
        int nblocks, i, err;

        mlog_entry_void();

        *res_dir = NULL;
        sb = dir->i_sb;

        nblocks = i_size_read(dir) >> sb->s_blocksize_bits;
        start = OCFS2_I(dir)->ip_dir_start_lookup;
        if (start >= nblocks)
                start = 0;
        block = start;

restart:
        do {
                /*
                 * We deal with the read-ahead logic here.
                 */
                if (ra_ptr >= ra_max) {
                        /* Refill the readahead buffer */
                        ra_ptr = 0;
                        b = block;
                        for (ra_max = 0; ra_max < NAMEI_RA_SIZE; ra_max++) {
                                /*
                                 * Terminate if we reach the end of the
                                 * directory and must wrap, or if our
                                 * search has finished at this block.
                                 */
                                if (b >= nblocks || (num && block == start)) {
                                        bh_use[ra_max] = NULL;
                                        break;
                                }
                                num++;

                                bh = ocfs2_bread(dir, b++, &err, 1);
                                bh_use[ra_max] = bh;
                        }
                }
                if ((bh = bh_use[ra_ptr++]) == NULL)
                        goto next;
                wait_on_buffer(bh);
                if (!buffer_uptodate(bh)) {
                        /* read error, skip block & hope for the best */
                        ocfs2_error(dir->i_sb, "reading directory %llu, "
                                    "offset %lu\n",
                                    (unsigned long long)OCFS2_I(dir)->ip_blkno,
                                    block);
                        brelse(bh);
                        goto next;
                }
                i = ocfs2_search_dirblock(bh, dir, name, namelen,
                                          block << sb->s_blocksize_bits,
                                          res_dir);
                if (i == 1) {
                        OCFS2_I(dir)->ip_dir_start_lookup = block;
                        ret = bh;
                        goto cleanup_and_exit;
                } else {
                        brelse(bh);
                        if (i < 0)
                                goto cleanup_and_exit;
                }
        next:
                if (++block >= nblocks)
                        block = 0;
        } while (block != start);

        /*
         * If the directory has grown while we were searching, then
         * search the last part of the directory before giving up.
         */
        block = nblocks;
        nblocks = i_size_read(dir) >> sb->s_blocksize_bits;
        if (block < nblocks) {
                start = 0;
                goto restart;
        }

cleanup_and_exit:
        /* Clean up the read-ahead blocks */
        for (; ra_ptr < ra_max; ra_ptr++)
                brelse(bh_use[ra_ptr]);

        mlog_exit_ptr(ret);
        return ret;
}

static int ocfs2_blkno_stringify(u64 blkno, char *name)
{
        int status, namelen;

        mlog_entry_void();

        namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
                           (long long)blkno);
        if (namelen <= 0) {
                if (namelen)
                        status = namelen;
                else
                        status = -EINVAL;
                mlog_errno(status);
                goto bail;
        }
        if (namelen != OCFS2_ORPHAN_NAMELEN) {
                status = -EINVAL;
                mlog_errno(status);
                goto bail;
        }

        mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name,
             namelen);

        status = 0;
bail:
        mlog_exit(status);
        return status;
}

static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
                                    struct ocfs2_journal_handle *handle,
                                    struct inode *inode,
                                    char *name,
                                    struct buffer_head **de_bh)
{
        struct inode *orphan_dir_inode = NULL;
        struct buffer_head *orphan_dir_bh = NULL;
        int status = 0;

        status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
        if (status < 0) {
                mlog_errno(status);
                goto leave;
        }

        orphan_dir_inode = ocfs2_get_system_file_inode(osb,
                                                       ORPHAN_DIR_SYSTEM_INODE,
                                                       osb->slot_num);
        if (!orphan_dir_inode) {
                status = -ENOENT;
                mlog_errno(status);
                goto leave;
        }

        ocfs2_handle_add_inode(handle, orphan_dir_inode);
        status = ocfs2_meta_lock(orphan_dir_inode, handle, &orphan_dir_bh, 1);
        if (status < 0) {
                mlog_errno(status);
                goto leave;
        }

        status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
                                              orphan_dir_bh, name,
                                              OCFS2_ORPHAN_NAMELEN, de_bh);
        if (status < 0) {
                mlog_errno(status);
                goto leave;
        }

leave:
        if (orphan_dir_inode)
                iput(orphan_dir_inode);

        if (orphan_dir_bh)
                brelse(orphan_dir_bh);

        mlog_exit(status);
        return status;
}

static int ocfs2_orphan_add(struct ocfs2_super *osb,
                            struct ocfs2_journal_handle *handle,
                            struct inode *inode,
                            struct ocfs2_dinode *fe,
                            char *name,
                            struct buffer_head *de_bh)
{
        struct inode *orphan_dir_inode = NULL;
        struct buffer_head *orphan_dir_bh = NULL;
        int status = 0;
        struct ocfs2_dinode *orphan_fe;

        mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);

        orphan_dir_inode = ocfs2_get_system_file_inode(osb,
                                                       ORPHAN_DIR_SYSTEM_INODE,
                                                       osb->slot_num);
        if (!orphan_dir_inode) {
                status = -ENOENT;
                mlog_errno(status);
                goto leave;
        }

        status = ocfs2_read_block(osb,
                                  OCFS2_I(orphan_dir_inode)->ip_blkno,
                                  &orphan_dir_bh, OCFS2_BH_CACHED,
                                  orphan_dir_inode);
        if (status < 0) {
                mlog_errno(status);
                goto leave;
        }

        status = ocfs2_journal_access(handle, orphan_dir_inode, orphan_dir_bh,
                                      OCFS2_JOURNAL_ACCESS_WRITE);
        if (status < 0) {
                mlog_errno(status);
                goto leave;
        }

        /* we're a cluster, and nlink can change on disk from
         * underneath us... */
        orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
        if (S_ISDIR(inode->i_mode))
                le16_add_cpu(&orphan_fe->i_links_count, 1);
        orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count);

        status = ocfs2_journal_dirty(handle, orphan_dir_bh);
        if (status < 0) {
                mlog_errno(status);
                goto leave;
        }

        status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
                                   OCFS2_ORPHAN_NAMELEN, inode,
                                   OCFS2_I(inode)->ip_blkno,
                                   orphan_dir_bh, de_bh);
        if (status < 0) {
                mlog_errno(status);
                goto leave;
        }

        le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);

        /* Record which orphan dir our inode now resides
         * in. delete_inode will use this to determine which orphan
         * dir to lock. */
        spin_lock(&OCFS2_I(inode)->ip_lock);
        OCFS2_I(inode)->ip_orphaned_slot = osb->slot_num;
        spin_unlock(&OCFS2_I(inode)->ip_lock);

        mlog(0, "Inode %llu orphaned in slot %d\n",
             (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num);

leave:
        if (orphan_dir_inode)
                iput(orphan_dir_inode);

        if (orphan_dir_bh)
                brelse(orphan_dir_bh);

        mlog_exit(status);
        return status;
}

/* unlike orphan_add, we expect the orphan dir to already be locked here. */
int ocfs2_orphan_del(struct ocfs2_super *osb,
                     struct ocfs2_journal_handle *handle,
                     struct inode *orphan_dir_inode,
                     struct inode *inode,
                     struct buffer_head *orphan_dir_bh)
{
        char name[OCFS2_ORPHAN_NAMELEN + 1];
        struct ocfs2_dinode *orphan_fe;
        int status = 0;
        struct buffer_head *target_de_bh = NULL;
        struct ocfs2_dir_entry *target_de = NULL;

        mlog_entry_void();

        status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
        if (status < 0) {
                mlog_errno(status);
                goto leave;
        }

        mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n",
             name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
             OCFS2_ORPHAN_NAMELEN);

        /* find it's spot in the orphan directory */
        target_de_bh = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN,
                                        orphan_dir_inode, &target_de);
        if (!target_de_bh) {
                status = -ENOENT;
                mlog_errno(status);
                goto leave;
        }

        /* remove it from the orphan directory */
        status = ocfs2_delete_entry(handle, orphan_dir_inode, target_de,
                                    target_de_bh);
        if (status < 0) {
                mlog_errno(status);
                goto leave;
        }

        status = ocfs2_journal_access(handle,orphan_dir_inode,  orphan_dir_bh,
                                      OCFS2_JOURNAL_ACCESS_WRITE);
        if (status < 0) {
                mlog_errno(status);
                goto leave;
        }

        /* do the i_nlink dance! :) */
        orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
        if (S_ISDIR(inode->i_mode))
                le16_add_cpu(&orphan_fe->i_links_count, -1);
        orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count);

        status = ocfs2_journal_dirty(handle, orphan_dir_bh);
        if (status < 0) {
                mlog_errno(status);
                goto leave;
        }

leave:
        if (target_de_bh)
                brelse(target_de_bh);

        mlog_exit(status);
        return status;
}

struct inode_operations ocfs2_dir_iops = {
        .create         = ocfs2_create,
        .lookup         = ocfs2_lookup,
        .link           = ocfs2_link,
        .unlink         = ocfs2_unlink,
        .rmdir          = ocfs2_unlink,
        .symlink        = ocfs2_symlink,
        .mkdir          = ocfs2_mkdir,
        .mknod          = ocfs2_mknod,
        .rename         = ocfs2_rename,
        .setattr        = ocfs2_setattr,
        .getattr        = ocfs2_getattr,
};