/*
   *   Copyright (C) International Business Machines Corp., 2000-2004
   *
   *   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 02111-1307 USA
   */
  
  #include <linux/fs.h>
  #include <linux/quotaops.h>
  #include "jfs_incore.h"

  #include "jfs_inode.h"

  #include "jfs_filsys.h"
  #include "jfs_imap.h"
  #include "jfs_dinode.h"
  #include "jfs_debug.h"

  
  void jfs_set_inode_flags(struct inode *inode)
  {
  	unsigned int flags = JFS_IP(inode)->mode2;
  
  	inode->i_flags &= ~(S_IMMUTABLE | S_APPEND |
  		S_NOATIME | S_DIRSYNC | S_SYNC);
  
  	if (flags & JFS_IMMUTABLE_FL)
  		inode->i_flags |= S_IMMUTABLE;
  	if (flags & JFS_APPEND_FL)
  		inode->i_flags |= S_APPEND;
  	if (flags & JFS_NOATIME_FL)
  		inode->i_flags |= S_NOATIME;
  	if (flags & JFS_DIRSYNC_FL)
  		inode->i_flags |= S_DIRSYNC;
  	if (flags & JFS_SYNC_FL)
  		inode->i_flags |= S_SYNC;
  }

  void jfs_get_inode_flags(struct jfs_inode_info *jfs_ip)
  {
  	unsigned int flags = jfs_ip->vfs_inode.i_flags;
  
  	jfs_ip->mode2 &= ~(JFS_IMMUTABLE_FL | JFS_APPEND_FL | JFS_NOATIME_FL |
  			   JFS_DIRSYNC_FL | JFS_SYNC_FL);
  	if (flags & S_IMMUTABLE)
  		jfs_ip->mode2 |= JFS_IMMUTABLE_FL;
  	if (flags & S_APPEND)
  		jfs_ip->mode2 |= JFS_APPEND_FL;
  	if (flags & S_NOATIME)
  		jfs_ip->mode2 |= JFS_NOATIME_FL;
  	if (flags & S_DIRSYNC)
  		jfs_ip->mode2 |= JFS_DIRSYNC_FL;
  	if (flags & S_SYNC)
  		jfs_ip->mode2 |= JFS_SYNC_FL;
  }

  /*
   * NAME:	ialloc()
   *
   * FUNCTION:	Allocate a new inode
   *
   */
  struct inode *ialloc(struct inode *parent, umode_t mode)
  {
  	struct super_block *sb = parent->i_sb;
  	struct inode *inode;
  	struct jfs_inode_info *jfs_inode;
  	int rc;
  
  	inode = new_inode(sb);
  	if (!inode) {
  		jfs_warn("ialloc: new_inode returned NULL!");

  		rc = -ENOMEM;
  		goto fail;

  	}
  
  	jfs_inode = JFS_IP(inode);
  
  	rc = diAlloc(parent, S_ISDIR(mode), inode);
  	if (rc) {
  		jfs_warn("ialloc: diAlloc returned %d!", rc);

  		if (rc == -EIO)
  			make_bad_inode(inode);

  		goto fail_put;
  	}
  
  	if (insert_inode_locked(inode) < 0) {
  		rc = -EINVAL;
  		goto fail_unlock;

  	}

  	inode_init_owner(inode, parent, mode);

  	/*

  	 * New inodes need to save sane values on disk when
  	 * uid & gid mount options are used
  	 */
  	jfs_inode->saved_uid = inode->i_uid;
  	jfs_inode->saved_gid = inode->i_gid;
  
  	/*

  	 * Allocate inode to quota.
  	 */

  	dquot_initialize(inode);

  	rc = dquot_alloc_inode(inode);
  	if (rc)

  		goto fail_drop;

  	/* inherit flags from parent */
  	jfs_inode->mode2 = JFS_IP(parent)->mode2 & JFS_FL_INHERIT;
  
  	if (S_ISDIR(mode)) {
  		jfs_inode->mode2 |= IDIRECTORY;
  		jfs_inode->mode2 &= ~JFS_DIRSYNC_FL;
  	}

  	else {

  		jfs_inode->mode2 |= INLINEEA | ISPARSE;

  		if (S_ISLNK(mode))
  			jfs_inode->mode2 &= ~(JFS_IMMUTABLE_FL|JFS_APPEND_FL);
  	}

  	jfs_inode->mode2 |= inode->i_mode;

  	inode->i_blocks = 0;
  	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
  	jfs_inode->otime = inode->i_ctime.tv_sec;
  	inode->i_generation = JFS_SBI(sb)->gengen++;
  
  	jfs_inode->cflag = 0;
  
  	/* Zero remaining fields */
  	memset(&jfs_inode->acl, 0, sizeof(dxd_t));
  	memset(&jfs_inode->ea, 0, sizeof(dxd_t));
  	jfs_inode->next_index = 0;
  	jfs_inode->acltype = 0;
  	jfs_inode->btorder = 0;
  	jfs_inode->btindex = 0;
  	jfs_inode->bxflag = 0;
  	jfs_inode->blid = 0;
  	jfs_inode->atlhead = 0;
  	jfs_inode->atltail = 0;
  	jfs_inode->xtlid = 0;

  	jfs_set_inode_flags(inode);

  
  	jfs_info("ialloc returns inode = 0x%p
  ", inode);
  
  	return inode;

  
  fail_drop:

  	dquot_drop(inode);

  	inode->i_flags |= S_NOQUOTA;
  fail_unlock:

  	clear_nlink(inode);

  	unlock_new_inode(inode);
  fail_put:
  	iput(inode);
  fail:
  	return ERR_PTR(rc);

  }