/*
   * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.

   * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.

   *
   * This copyrighted material is made available to anyone wishing to use,
   * modify, copy, or redistribute it subject to the terms and conditions

   * of the GNU General Public License version 2.

   */

  #include <linux/slab.h>
  #include <linux/spinlock.h>
  #include <linux/completion.h>
  #include <linux/buffer_head.h>
  #include <linux/xattr.h>

  #include <linux/gfs2_ondisk.h>

  #include <asm/uaccess.h>
  
  #include "gfs2.h"

  #include "incore.h"

  #include "acl.h"

  #include "xattr.h"

  #include "glock.h"
  #include "inode.h"
  #include "meta_io.h"
  #include "quota.h"
  #include "rgrp.h"
  #include "trans.h"

  #include "util.h"

  
  /**
   * ea_calc_size - returns the acutal number of bytes the request will take up
   *                (not counting any unstuffed data blocks)
   * @sdp:
   * @er:
   * @size:
   *
   * Returns: 1 if the EA should be stuffed
   */

  static int ea_calc_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize,

  			unsigned int *size)
  {

  	unsigned int jbsize = sdp->sd_jbsize;
  
  	/* Stuffed */
  	*size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + dsize, 8);
  
  	if (*size <= jbsize)

  		return 1;

  	/* Unstuffed */
  	*size = ALIGN(sizeof(struct gfs2_ea_header) + nsize +
  		      (sizeof(__be64) * DIV_ROUND_UP(dsize, jbsize)), 8);

  
  	return 0;
  }

  static int ea_check_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize)

  {
  	unsigned int size;

  	if (dsize > GFS2_EA_MAX_DATA_LEN)

  		return -ERANGE;

  	ea_calc_size(sdp, nsize, dsize, &size);

  
  	/* This can only happen with 512 byte blocks */
  	if (size > sdp->sd_jbsize)
  		return -ERANGE;
  
  	return 0;
  }

  typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh,

  			  struct gfs2_ea_header *ea,

  			  struct gfs2_ea_header *prev, void *private);

  
  static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
  			ea_call_t ea_call, void *data)
  {
  	struct gfs2_ea_header *ea, *prev = NULL;
  	int error = 0;

  	if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA))

  		return -EIO;
  
  	for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
  		if (!GFS2_EA_REC_LEN(ea))
  			goto fail;

  		if (!(bh->b_data <= (char *)ea && (char *)GFS2_EA2NEXT(ea) <=
  						  bh->b_data + bh->b_size))

  			goto fail;
  		if (!GFS2_EATYPE_VALID(ea->ea_type))
  			goto fail;
  
  		error = ea_call(ip, bh, ea, prev, data);
  		if (error)
  			return error;
  
  		if (GFS2_EA_IS_LAST(ea)) {
  			if ((char *)GFS2_EA2NEXT(ea) !=
  			    bh->b_data + bh->b_size)
  				goto fail;
  			break;
  		}
  	}
  
  	return error;

  fail:

  	gfs2_consist_inode(ip);
  	return -EIO;
  }
  
  static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data)
  {
  	struct buffer_head *bh, *eabh;

  	__be64 *eablk, *end;

  	int error;

  	error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &bh);

  	if (error)
  		return error;

  	if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) {

  		error = ea_foreach_i(ip, bh, ea_call, data);
  		goto out;
  	}

  	if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) {

  		error = -EIO;
  		goto out;
  	}

  	eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header));

  	end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs;

  
  	for (; eablk < end; eablk++) {

  		u64 bn;

  
  		if (!*eablk)
  			break;
  		bn = be64_to_cpu(*eablk);

  		error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, &eabh);

  		if (error)
  			break;
  		error = ea_foreach_i(ip, eabh, ea_call, data);
  		brelse(eabh);
  		if (error)
  			break;
  	}

  out:

  	brelse(bh);

  	return error;
  }
  
  struct ea_find {

  	int type;
  	const char *name;
  	size_t namel;

  	struct gfs2_ea_location *ef_el;
  };
  
  static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
  		     struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
  		     void *private)
  {
  	struct ea_find *ef = private;

  
  	if (ea->ea_type == GFS2_EATYPE_UNUSED)
  		return 0;

  	if (ea->ea_type == ef->type) {
  		if (ea->ea_name_len == ef->namel &&
  		    !memcmp(GFS2_EA2NAME(ea), ef->name, ea->ea_name_len)) {

  			struct gfs2_ea_location *el = ef->ef_el;
  			get_bh(bh);
  			el->el_bh = bh;
  			el->el_ea = ea;
  			el->el_prev = prev;
  			return 1;
  		}
  	}

  	return 0;
  }

  static int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name,
  			struct gfs2_ea_location *el)

  {
  	struct ea_find ef;
  	int error;

  	ef.type = type;
  	ef.name = name;
  	ef.namel = strlen(name);

  	ef.ef_el = el;
  
  	memset(el, 0, sizeof(struct gfs2_ea_location));
  
  	error = ea_foreach(ip, ea_find_i, &ef);
  	if (error > 0)
  		return 0;
  
  	return error;
  }
  
  /**
   * ea_dealloc_unstuffed -
   * @ip:
   * @bh:
   * @ea:
   * @prev:
   * @private:
   *
   * Take advantage of the fact that all unstuffed blocks are
   * allocated from the same RG.  But watch, this may not always
   * be true.
   *
   * Returns: errno
   */
  
  static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
  				struct gfs2_ea_header *ea,
  				struct gfs2_ea_header *prev, void *private)
  {
  	int *leave = private;

  	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);

  	struct gfs2_rgrpd *rgd;
  	struct gfs2_holder rg_gh;
  	struct buffer_head *dibh;

  	__be64 *dataptrs;
  	u64 bn = 0;

  	u64 bstart = 0;

  	unsigned int blen = 0;
  	unsigned int blks = 0;
  	unsigned int x;
  	int error;
  
  	if (GFS2_EA_IS_STUFFED(ea))
  		return 0;
  
  	dataptrs = GFS2_EA2DATAPTRS(ea);

  	for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {

  		if (*dataptrs) {
  			blks++;
  			bn = be64_to_cpu(*dataptrs);
  		}

  	}

  	if (!blks)
  		return 0;
  
  	rgd = gfs2_blk2rgrpd(sdp, bn);
  	if (!rgd) {
  		gfs2_consist_inode(ip);
  		return -EIO;
  	}
  
  	error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
  	if (error)
  		return error;

  	error = gfs2_trans_begin(sdp, rgd->rd_length + RES_DINODE +

  				 RES_EATTR + RES_STATFS + RES_QUOTA, blks);

  	if (error)
  		goto out_gunlock;

  	gfs2_trans_add_bh(ip->i_gl, bh, 1);

  
  	dataptrs = GFS2_EA2DATAPTRS(ea);
  	for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
  		if (!*dataptrs)
  			break;
  		bn = be64_to_cpu(*dataptrs);
  
  		if (bstart + blen == bn)
  			blen++;
  		else {
  			if (bstart)
  				gfs2_free_meta(ip, bstart, blen);
  			bstart = bn;
  			blen = 1;
  		}
  
  		*dataptrs = 0;

  		gfs2_add_inode_blocks(&ip->i_inode, -1);

  	}
  	if (bstart)
  		gfs2_free_meta(ip, bstart, blen);
  
  	if (prev && !leave) {

  		u32 len;

  
  		len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
  		prev->ea_rec_len = cpu_to_be32(len);
  
  		if (GFS2_EA_IS_LAST(ea))
  			prev->ea_flags |= GFS2_EAFLAG_LAST;
  	} else {
  		ea->ea_type = GFS2_EATYPE_UNUSED;
  		ea->ea_num_ptrs = 0;
  	}
  
  	error = gfs2_meta_inode_buffer(ip, &dibh);
  	if (!error) {

  		ip->i_inode.i_ctime = CURRENT_TIME;

  		gfs2_trans_add_bh(ip->i_gl, dibh, 1);

  		gfs2_dinode_out(ip, dibh->b_data);

  		brelse(dibh);
  	}
  
  	gfs2_trans_end(sdp);

  out_gunlock:

  	gfs2_glock_dq_uninit(&rg_gh);

  	return error;
  }
  
  static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
  			       struct gfs2_ea_header *ea,
  			       struct gfs2_ea_header *prev, int leave)
  {

  	struct gfs2_qadata *qa;

  	int error;

  	qa = gfs2_qadata_get(ip);
  	if (!qa)

  		return -ENOMEM;

  
  	error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
  	if (error)
  		goto out_alloc;

  	error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL);

  	gfs2_quota_unhold(ip);

  out_alloc:

  	gfs2_qadata_put(ip);

  	return error;
  }

  struct ea_list {
  	struct gfs2_ea_request *ei_er;
  	unsigned int ei_size;
  };

  static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
  {
  	switch (ea->ea_type) {
  	case GFS2_EATYPE_USR:
  		return 5 + ea->ea_name_len + 1;
  	case GFS2_EATYPE_SYS:
  		return 7 + ea->ea_name_len + 1;
  	case GFS2_EATYPE_SECURITY:
  		return 9 + ea->ea_name_len + 1;
  	default:
  		return 0;
  	}
  }

  static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
  		     struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
  		     void *private)
  {
  	struct ea_list *ei = private;
  	struct gfs2_ea_request *er = ei->ei_er;

  	unsigned int ea_size = gfs2_ea_strlen(ea);

  
  	if (ea->ea_type == GFS2_EATYPE_UNUSED)
  		return 0;
  
  	if (er->er_data_len) {

  		char *prefix = NULL;
  		unsigned int l = 0;

  		char c = 0;
  
  		if (ei->ei_size + ea_size > er->er_data_len)
  			return -ERANGE;

  		switch (ea->ea_type) {
  		case GFS2_EATYPE_USR:

  			prefix = "user.";
  			l = 5;

  			break;
  		case GFS2_EATYPE_SYS:

  			prefix = "system.";
  			l = 7;

  			break;
  		case GFS2_EATYPE_SECURITY:
  			prefix = "security.";
  			l = 9;
  			break;

  		}

  		BUG_ON(l == 0);

  		memcpy(er->er_data + ei->ei_size, prefix, l);
  		memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),

  		       ea->ea_name_len);

  		memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1);

  	}
  
  	ei->ei_size += ea_size;
  
  	return 0;
  }
  
  /**

   * gfs2_listxattr - List gfs2 extended attributes
   * @dentry: The dentry whose inode we are interested in
   * @buffer: The buffer to write the results
   * @size: The size of the buffer

   *
   * Returns: actual size of data on success, -errno on error
   */

  ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size)

  {

  	struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
  	struct gfs2_ea_request er;

  	struct gfs2_holder i_gh;
  	int error;

  	memset(&er, 0, sizeof(struct gfs2_ea_request));
  	if (size) {
  		er.er_data = buffer;
  		er.er_data_len = size;

  	}

  	error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);

  	if (error)
  		return error;

  	if (ip->i_eattr) {

  		struct ea_list ei = { .ei_er = &er, .ei_size = 0 };

  
  		error = ea_foreach(ip, ea_list_i, &ei);
  		if (!error)
  			error = ei.ei_size;
  	}
  
  	gfs2_glock_dq_uninit(&i_gh);
  
  	return error;
  }
  
  /**
   * ea_get_unstuffed - actually copies the unstuffed data into the
   *                    request buffer

   * @ip: The GFS2 inode
   * @ea: The extended attribute header structure
   * @data: The data to be copied

   *
   * Returns: errno
   */
  
  static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
  			    char *data)
  {

  	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);

  	struct buffer_head **bh;
  	unsigned int amount = GFS2_EA_DATA_LEN(ea);

  	unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);

  	__be64 *dataptrs = GFS2_EA2DATAPTRS(ea);

  	unsigned int x;
  	int error = 0;

  	bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);

  	if (!bh)
  		return -ENOMEM;
  
  	for (x = 0; x < nptrs; x++) {

  		error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
  				       bh + x);

  		if (error) {
  			while (x--)
  				brelse(bh[x]);
  			goto out;
  		}
  		dataptrs++;
  	}
  
  	for (x = 0; x < nptrs; x++) {

  		error = gfs2_meta_wait(sdp, bh[x]);

  		if (error) {
  			for (; x < nptrs; x++)
  				brelse(bh[x]);
  			goto out;
  		}
  		if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
  			for (; x < nptrs; x++)
  				brelse(bh[x]);
  			error = -EIO;
  			goto out;
  		}

  		memcpy(data, bh[x]->b_data + sizeof(struct gfs2_meta_header),

  		       (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
  
  		amount -= sdp->sd_jbsize;
  		data += sdp->sd_jbsize;
  
  		brelse(bh[x]);
  	}

  out:

  	kfree(bh);

  	return error;
  }

  static int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
  			    char *data, size_t size)

  {

  	int ret;
  	size_t len = GFS2_EA_DATA_LEN(el->el_ea);
  	if (len > size)
  		return -ERANGE;

  	if (GFS2_EA_IS_STUFFED(el->el_ea)) {

  		memcpy(data, GFS2_EA2DATA(el->el_ea), len);
  		return len;
  	}
  	ret = ea_get_unstuffed(ip, el->el_ea, data);
  	if (ret < 0)
  		return ret;
  	return len;

  }

  int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **ppdata)
  {
  	struct gfs2_ea_location el;
  	int error;
  	int len;
  	char *data;
  
  	error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, name, &el);
  	if (error)
  		return error;
  	if (!el.el_ea)
  		goto out;
  	if (!GFS2_EA_DATA_LEN(el.el_ea))
  		goto out;
  
  	len = GFS2_EA_DATA_LEN(el.el_ea);
  	data = kmalloc(len, GFP_NOFS);
  	error = -ENOMEM;
  	if (data == NULL)
  		goto out;
  
  	error = gfs2_ea_get_copy(ip, &el, data, len);

  	if (error < 0)
  		kfree(data);
  	else
  		*ppdata = data;

  out:
  	brelse(el.el_bh);
  	return error;
  }

  /**

   * gfs2_xattr_get - Get a GFS2 extended attribute
   * @inode: The inode

   * @name: The name of the extended attribute
   * @buffer: The buffer to write the result into
   * @size: The size of the buffer

   * @type: The type of extended attribute

   *
   * Returns: actual size of data on success, -errno on error
   */

  static int gfs2_xattr_get(struct dentry *dentry, const char *name,
  		void *buffer, size_t size, int type)

  {

  	struct gfs2_inode *ip = GFS2_I(dentry->d_inode);

  	struct gfs2_ea_location el;
  	int error;

  	if (!ip->i_eattr)

  		return -ENODATA;

  	if (strlen(name) > GFS2_EA_MAX_NAME_LEN)
  		return -EINVAL;

  	error = gfs2_ea_find(ip, type, name, &el);

  	if (error)
  		return error;
  	if (!el.el_ea)
  		return -ENODATA;

  	if (size)

  		error = gfs2_ea_get_copy(ip, &el, buffer, size);
  	else

  		error = GFS2_EA_DATA_LEN(el.el_ea);

  	brelse(el.el_bh);
  
  	return error;
  }
  
  /**

   * ea_alloc_blk - allocates a new block for extended attributes.
   * @ip: A pointer to the inode that's getting extended attributes

   * @bhp: Pointer to pointer to a struct buffer_head

   *
   * Returns: errno
   */
  
  static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
  {

  	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);

  	struct gfs2_ea_header *ea;

  	unsigned int n = 1;

  	u64 block;

  	int error;

  	error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);

  	if (error)
  		return error;

  	gfs2_trans_add_unrevoke(sdp, block, 1);

  	*bhp = gfs2_meta_new(ip->i_gl, block);

  	gfs2_trans_add_bh(ip->i_gl, *bhp, 1);

  	gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
  	gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
  
  	ea = GFS2_EA_BH2FIRST(*bhp);
  	ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
  	ea->ea_type = GFS2_EATYPE_UNUSED;
  	ea->ea_flags = GFS2_EAFLAG_LAST;
  	ea->ea_num_ptrs = 0;

  	gfs2_add_inode_blocks(&ip->i_inode, 1);

  
  	return 0;
  }
  
  /**
   * ea_write - writes the request info to an ea, creating new blocks if
   *            necessary

   * @ip: inode that is being modified
   * @ea: the location of the new ea in a block

   * @er: the write request
   *
   * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
   *
   * returns : errno
   */
  
  static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
  		    struct gfs2_ea_request *er)
  {

  	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);

  	int error;

  
  	ea->ea_data_len = cpu_to_be32(er->er_data_len);
  	ea->ea_name_len = er->er_name_len;
  	ea->ea_type = er->er_type;
  	ea->__pad = 0;
  
  	memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
  
  	if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
  		ea->ea_num_ptrs = 0;
  		memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
  	} else {

  		__be64 *dataptr = GFS2_EA2DATAPTRS(ea);

  		const char *data = er->er_data;
  		unsigned int data_len = er->er_data_len;
  		unsigned int copy;
  		unsigned int x;

  		ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);

  		for (x = 0; x < ea->ea_num_ptrs; x++) {
  			struct buffer_head *bh;

  			u64 block;

  			int mh_size = sizeof(struct gfs2_meta_header);

  			unsigned int n = 1;

  			error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);

  			if (error)
  				return error;

  			gfs2_trans_add_unrevoke(sdp, block, 1);

  			bh = gfs2_meta_new(ip->i_gl, block);

  			gfs2_trans_add_bh(ip->i_gl, bh, 1);

  			gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);

  			gfs2_add_inode_blocks(&ip->i_inode, 1);

  			copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize :
  							   data_len;

  			memcpy(bh->b_data + mh_size, data, copy);
  			if (copy < sdp->sd_jbsize)
  				memset(bh->b_data + mh_size + copy, 0,
  				       sdp->sd_jbsize - copy);

  			*dataptr++ = cpu_to_be64(bh->b_blocknr);

  			data += copy;
  			data_len -= copy;
  
  			brelse(bh);
  		}
  
  		gfs2_assert_withdraw(sdp, !data_len);
  	}
  
  	return 0;
  }
  
  typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,

  				   struct gfs2_ea_request *er, void *private);

  
  static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
  			     unsigned int blks,

  			     ea_skeleton_call_t skeleton_call, void *private)

  {

  	struct gfs2_qadata *qa;

  	struct buffer_head *dibh;
  	int error;

  	qa = gfs2_qadata_get(ip);
  	if (!qa)

  		return -ENOMEM;

  	error = gfs2_quota_lock_check(ip);

  	if (error)
  		goto out;

  	error = gfs2_inplace_reserve(ip, blks);

  	if (error)
  		goto out_gunlock_q;

  	error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),

  				 blks + gfs2_rg_blocks(ip) +

  				 RES_DINODE + RES_STATFS + RES_QUOTA, 0);
  	if (error)
  		goto out_ipres;
  
  	error = skeleton_call(ip, er, private);
  	if (error)
  		goto out_end_trans;
  
  	error = gfs2_meta_inode_buffer(ip, &dibh);
  	if (!error) {

  		ip->i_inode.i_ctime = CURRENT_TIME;

  		gfs2_trans_add_bh(ip->i_gl, dibh, 1);

  		gfs2_dinode_out(ip, dibh->b_data);

  		brelse(dibh);
  	}

  out_end_trans:

  	gfs2_trans_end(GFS2_SB(&ip->i_inode));

  out_ipres:

  	gfs2_inplace_release(ip);

  out_gunlock_q:

  	gfs2_quota_unlock(ip);

  out:

  	gfs2_qadata_put(ip);

  	return error;
  }
  
  static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
  		     void *private)
  {
  	struct buffer_head *bh;
  	int error;
  
  	error = ea_alloc_blk(ip, &bh);
  	if (error)
  		return error;

  	ip->i_eattr = bh->b_blocknr;

  	error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
  
  	brelse(bh);
  
  	return error;
  }
  
  /**
   * ea_init - initializes a new eattr block
   * @ip:
   * @er:
   *
   * Returns: errno
   */

  static int ea_init(struct gfs2_inode *ip, int type, const char *name,
  		   const void *data, size_t size)

  {

  	struct gfs2_ea_request er;

  	unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize;

  	unsigned int blks = 1;

  	er.er_type = type;
  	er.er_name = name;
  	er.er_name_len = strlen(name);
  	er.er_data = (void *)data;
  	er.er_data_len = size;
  
  	if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize)
  		blks += DIV_ROUND_UP(er.er_data_len, jbsize);

  	return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL);

  }
  
  static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
  {

  	u32 ea_size = GFS2_EA_SIZE(ea);

  	struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
  				     ea_size);

  	u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size;

  	int last = ea->ea_flags & GFS2_EAFLAG_LAST;
  
  	ea->ea_rec_len = cpu_to_be32(ea_size);
  	ea->ea_flags ^= last;
  
  	new->ea_rec_len = cpu_to_be32(new_size);
  	new->ea_flags = last;
  
  	return new;
  }
  
  static void ea_set_remove_stuffed(struct gfs2_inode *ip,
  				  struct gfs2_ea_location *el)
  {
  	struct gfs2_ea_header *ea = el->el_ea;
  	struct gfs2_ea_header *prev = el->el_prev;

  	u32 len;

  	gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);

  
  	if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
  		ea->ea_type = GFS2_EATYPE_UNUSED;
  		return;
  	} else if (GFS2_EA2NEXT(prev) != ea) {
  		prev = GFS2_EA2NEXT(prev);

  		gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea);

  	}
  
  	len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
  	prev->ea_rec_len = cpu_to_be32(len);
  
  	if (GFS2_EA_IS_LAST(ea))
  		prev->ea_flags |= GFS2_EAFLAG_LAST;
  }
  
  struct ea_set {
  	int ea_split;
  
  	struct gfs2_ea_request *es_er;
  	struct gfs2_ea_location *es_el;
  
  	struct buffer_head *es_bh;
  	struct gfs2_ea_header *es_ea;
  };
  
  static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
  				 struct gfs2_ea_header *ea, struct ea_set *es)
  {
  	struct gfs2_ea_request *er = es->es_er;
  	struct buffer_head *dibh;
  	int error;

  	error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0);

  	if (error)
  		return error;

  	gfs2_trans_add_bh(ip->i_gl, bh, 1);

  
  	if (es->ea_split)
  		ea = ea_split_ea(ea);
  
  	ea_write(ip, ea, er);
  
  	if (es->es_el)
  		ea_set_remove_stuffed(ip, es->es_el);
  
  	error = gfs2_meta_inode_buffer(ip, &dibh);
  	if (error)
  		goto out;

  	ip->i_inode.i_ctime = CURRENT_TIME;

  	gfs2_trans_add_bh(ip->i_gl, dibh, 1);

  	gfs2_dinode_out(ip, dibh->b_data);

  	brelse(dibh);

  out:

  	gfs2_trans_end(GFS2_SB(&ip->i_inode));

  	return error;
  }
  
  static int ea_set_simple_alloc(struct gfs2_inode *ip,
  			       struct gfs2_ea_request *er, void *private)
  {
  	struct ea_set *es = private;
  	struct gfs2_ea_header *ea = es->es_ea;
  	int error;

  	gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1);

  
  	if (es->ea_split)
  		ea = ea_split_ea(ea);
  
  	error = ea_write(ip, ea, er);
  	if (error)
  		return error;
  
  	if (es->es_el)
  		ea_set_remove_stuffed(ip, es->es_el);
  
  	return 0;
  }
  
  static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
  			 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
  			 void *private)
  {
  	struct ea_set *es = private;
  	unsigned int size;
  	int stuffed;
  	int error;

  	stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len,
  			       es->es_er->er_data_len, &size);

  
  	if (ea->ea_type == GFS2_EATYPE_UNUSED) {
  		if (GFS2_EA_REC_LEN(ea) < size)
  			return 0;
  		if (!GFS2_EA_IS_STUFFED(ea)) {
  			error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
  			if (error)
  				return error;
  		}
  		es->ea_split = 0;
  	} else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
  		es->ea_split = 1;
  	else
  		return 0;
  
  	if (stuffed) {
  		error = ea_set_simple_noalloc(ip, bh, ea, es);
  		if (error)
  			return error;
  	} else {
  		unsigned int blks;
  
  		es->es_bh = bh;
  		es->es_ea = ea;

  		blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,

  					GFS2_SB(&ip->i_inode)->sd_jbsize);

  
  		error = ea_alloc_skeleton(ip, es->es_er, blks,
  					  ea_set_simple_alloc, es);
  		if (error)
  			return error;
  	}
  
  	return 1;
  }
  
  static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
  			void *private)
  {

  	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);

  	struct buffer_head *indbh, *newbh;

  	__be64 *eablk;

  	int error;
  	int mh_size = sizeof(struct gfs2_meta_header);

  	if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {

  		__be64 *end;

  		error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT,

  				       &indbh);

  		if (error)
  			return error;
  
  		if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
  			error = -EIO;
  			goto out;
  		}

  		eablk = (__be64 *)(indbh->b_data + mh_size);

  		end = eablk + sdp->sd_inptrs;
  
  		for (; eablk < end; eablk++)
  			if (!*eablk)
  				break;
  
  		if (eablk == end) {
  			error = -ENOSPC;
  			goto out;
  		}

  		gfs2_trans_add_bh(ip->i_gl, indbh, 1);

  	} else {

  		u64 blk;

  		unsigned int n = 1;

  		error = gfs2_alloc_blocks(ip, &blk, &n, 0, NULL);

  		if (error)
  			return error;

  		gfs2_trans_add_unrevoke(sdp, blk, 1);

  		indbh = gfs2_meta_new(ip->i_gl, blk);

  		gfs2_trans_add_bh(ip->i_gl, indbh, 1);

  		gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
  		gfs2_buffer_clear_tail(indbh, mh_size);

  		eablk = (__be64 *)(indbh->b_data + mh_size);

  		*eablk = cpu_to_be64(ip->i_eattr);
  		ip->i_eattr = blk;

  		ip->i_diskflags |= GFS2_DIF_EA_INDIRECT;

  		gfs2_add_inode_blocks(&ip->i_inode, 1);

  
  		eablk++;
  	}
  
  	error = ea_alloc_blk(ip, &newbh);
  	if (error)
  		goto out;

  	*eablk = cpu_to_be64((u64)newbh->b_blocknr);

  	error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
  	brelse(newbh);
  	if (error)
  		goto out;
  
  	if (private)

  		ea_set_remove_stuffed(ip, private);

  out:

  	brelse(indbh);

  	return error;
  }

  static int ea_set_i(struct gfs2_inode *ip, int type, const char *name,
  		    const void *value, size_t size, struct gfs2_ea_location *el)

  {

  	struct gfs2_ea_request er;

  	struct ea_set es;
  	unsigned int blks = 2;
  	int error;

  	er.er_type = type;
  	er.er_name = name;
  	er.er_data = (void *)value;
  	er.er_name_len = strlen(name);
  	er.er_data_len = size;

  	memset(&es, 0, sizeof(struct ea_set));

  	es.es_er = &er;

  	es.es_el = el;
  
  	error = ea_foreach(ip, ea_set_simple, &es);
  	if (error > 0)
  		return 0;
  	if (error)
  		return error;

  	if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT))

  		blks++;

  	if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize)
  		blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize);

  	return ea_alloc_skeleton(ip, &er, blks, ea_set_block, el);

  }
  
  static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
  				   struct gfs2_ea_location *el)
  {
  	if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
  		el->el_prev = GFS2_EA2NEXT(el->el_prev);

  		gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),

  				     GFS2_EA2NEXT(el->el_prev) == el->el_ea);
  	}

  	return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev, 0);

  }

  static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
  {
  	struct gfs2_ea_header *ea = el->el_ea;
  	struct gfs2_ea_header *prev = el->el_prev;
  	struct buffer_head *dibh;
  	int error;

  	error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);

  	if (error)
  		return error;

  	gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);

  
  	if (prev) {

  		u32 len;

  
  		len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
  		prev->ea_rec_len = cpu_to_be32(len);
  
  		if (GFS2_EA_IS_LAST(ea))
  			prev->ea_flags |= GFS2_EAFLAG_LAST;

  	} else {

  		ea->ea_type = GFS2_EATYPE_UNUSED;

  	}

  
  	error = gfs2_meta_inode_buffer(ip, &dibh);
  	if (!error) {

  		ip->i_inode.i_ctime = CURRENT_TIME;

  		gfs2_trans_add_bh(ip->i_gl, dibh, 1);

  		gfs2_dinode_out(ip, dibh->b_data);

  		brelse(dibh);

  	}

  	gfs2_trans_end(GFS2_SB(&ip->i_inode));

  
  	return error;
  }

  /**
   * gfs2_xattr_remove - Remove a GFS2 extended attribute

   * @ip: The inode

   * @type: The type of the extended attribute
   * @name: The name of the extended attribute
   *
   * This is not called directly by the VFS since we use the (common)
   * scheme of making a "set with NULL data" mean a remove request. Note
   * that this is different from a set with zero length data.
   *
   * Returns: 0, or errno on failure
   */

  static int gfs2_xattr_remove(struct gfs2_inode *ip, int type, const char *name)

  {
  	struct gfs2_ea_location el;
  	int error;

  	if (!ip->i_eattr)

  		return -ENODATA;

  	error = gfs2_ea_find(ip, type, name, &el);

  	if (error)
  		return error;
  	if (!el.el_ea)
  		return -ENODATA;
  
  	if (GFS2_EA_IS_STUFFED(el.el_ea))
  		error = ea_remove_stuffed(ip, &el);
  	else

  		error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0);

  
  	brelse(el.el_bh);
  
  	return error;
  }
  
  /**

   * __gfs2_xattr_set - Set (or remove) a GFS2 extended attribute
   * @ip: The inode

   * @name: The name of the extended attribute
   * @value: The value of the extended attribute (NULL for remove)
   * @size: The size of the @value argument
   * @flags: Create or Replace

   * @type: The type of the extended attribute

   *

   * See gfs2_xattr_remove() for details of the removal of xattrs.
   *
   * Returns: 0 or errno on failure

   */

  int __gfs2_xattr_set(struct inode *inode, const char *name,
  		   const void *value, size_t size, int flags, int type)

  {

  	struct gfs2_inode *ip = GFS2_I(inode);

  	struct gfs2_sbd *sdp = GFS2_SB(inode);

  	struct gfs2_ea_location el;
  	unsigned int namel = strlen(name);

  	int error;

  	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
  		return -EPERM;
  	if (namel > GFS2_EA_MAX_NAME_LEN)
  		return -ERANGE;

  	if (value == NULL)

  		return gfs2_xattr_remove(ip, type, name);

  
  	if (ea_check_size(sdp, namel, size))
  		return -ERANGE;
  
  	if (!ip->i_eattr) {
  		if (flags & XATTR_REPLACE)
  			return -ENODATA;
  		return ea_init(ip, type, name, value, size);
  	}
  
  	error = gfs2_ea_find(ip, type, name, &el);

  	if (error)
  		return error;

  	if (el.el_ea) {
  		if (ip->i_diskflags & GFS2_DIF_APPENDONLY) {
  			brelse(el.el_bh);
  			return -EPERM;
  		}

  		error = -EEXIST;
  		if (!(flags & XATTR_CREATE)) {
  			int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
  			error = ea_set_i(ip, type, name, value, size, &el);
  			if (!error && unstuffed)
  				ea_set_remove_unstuffed(ip, &el);
  		}
  
  		brelse(el.el_bh);
  		return error;
  	}
  
  	error = -ENODATA;
  	if (!(flags & XATTR_REPLACE))
  		error = ea_set_i(ip, type, name, value, size, NULL);

  
  	return error;
  }

  static int gfs2_xattr_set(struct dentry *dentry, const char *name,
  		const void *value, size_t size, int flags, int type)
  {
  	return __gfs2_xattr_set(dentry->d_inode, name, value,
  				size, flags, type);
  }

  static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
  				  struct gfs2_ea_header *ea, char *data)
  {

  	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);

  	struct buffer_head **bh;
  	unsigned int amount = GFS2_EA_DATA_LEN(ea);

  	unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);

  	__be64 *dataptrs = GFS2_EA2DATAPTRS(ea);

  	unsigned int x;
  	int error;

  	bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);

  	if (!bh)
  		return -ENOMEM;
  
  	error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
  	if (error)
  		goto out;
  
  	for (x = 0; x < nptrs; x++) {

  		error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
  				       bh + x);

  		if (error) {
  			while (x--)
  				brelse(bh[x]);
  			goto fail;
  		}
  		dataptrs++;
  	}
  
  	for (x = 0; x < nptrs; x++) {

  		error = gfs2_meta_wait(sdp, bh[x]);

  		if (error) {
  			for (; x < nptrs; x++)
  				brelse(bh[x]);
  			goto fail;
  		}
  		if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
  			for (; x < nptrs; x++)
  				brelse(bh[x]);
  			error = -EIO;
  			goto fail;
  		}

  		gfs2_trans_add_bh(ip->i_gl, bh[x], 1);

  		memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header), data,

  		       (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
  
  		amount -= sdp->sd_jbsize;
  		data += sdp->sd_jbsize;
  
  		brelse(bh[x]);
  	}

  out:

  	kfree(bh);

  	return error;

  fail:

  	gfs2_trans_end(sdp);
  	kfree(bh);

  	return error;
  }

  int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data)

  {

  	struct inode *inode = &ip->i_inode;
  	struct gfs2_sbd *sdp = GFS2_SB(inode);

  	struct gfs2_ea_location el;

  	int error;

  	error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, GFS2_POSIX_ACL_ACCESS, &el);
  	if (error)
  		return error;
  
  	if (GFS2_EA_IS_STUFFED(el.el_ea)) {

  		error = gfs2_trans_begin(sdp, RES_DINODE + RES_EATTR, 0);
  		if (error == 0) {
  			gfs2_trans_add_bh(ip->i_gl, el.el_bh, 1);
  			memcpy(GFS2_EA2DATA(el.el_ea), data,
  			       GFS2_EA_DATA_LEN(el.el_ea));
  		}
  	} else {

  		error = ea_acl_chmod_unstuffed(ip, el.el_ea, data);

  	}

  	brelse(el.el_bh);

  	if (error)
  		return error;

  	error = gfs2_setattr_simple(inode, attr);

  	gfs2_trans_end(sdp);

  	return error;
  }
  
  static int ea_dealloc_indirect(struct gfs2_inode *ip)
  {

  	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);

  	struct gfs2_rgrp_list rlist;
  	struct buffer_head *indbh, *dibh;

  	__be64 *eablk, *end;

  	unsigned int rg_blocks = 0;

  	u64 bstart = 0;

  	unsigned int blen = 0;
  	unsigned int blks = 0;
  	unsigned int x;
  	int error;
  
  	memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));

  	error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &indbh);

  	if (error)
  		return error;
  
  	if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
  		error = -EIO;
  		goto out;
  	}

  	eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));

  	end = eablk + sdp->sd_inptrs;
  
  	for (; eablk < end; eablk++) {

  		u64 bn;

  
  		if (!*eablk)
  			break;
  		bn = be64_to_cpu(*eablk);
  
  		if (bstart + blen == bn)
  			blen++;
  		else {
  			if (bstart)

  				gfs2_rlist_add(ip, &rlist, bstart);

  			bstart = bn;
  			blen = 1;
  		}
  		blks++;
  	}
  	if (bstart)

  		gfs2_rlist_add(ip, &rlist, bstart);

  	else
  		goto out;

  	gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE);

  
  	for (x = 0; x < rlist.rl_rgrps; x++) {
  		struct gfs2_rgrpd *rgd;

  		rgd = rlist.rl_ghs[x].gh_gl->gl_object;

  		rg_blocks += rgd->rd_length;

  	}
  
  	error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
  	if (error)
  		goto out_rlist_free;

  	error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT +
  				 RES_STATFS + RES_QUOTA, blks);

  	if (error)
  		goto out_gunlock;

  	gfs2_trans_add_bh(ip->i_gl, indbh, 1);

  	eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));

  	bstart = 0;
  	blen = 0;
  
  	for (; eablk < end; eablk++) {

  		u64 bn;

  
  		if (!*eablk)
  			break;
  		bn = be64_to_cpu(*eablk);
  
  		if (bstart + blen == bn)
  			blen++;
  		else {
  			if (bstart)
  				gfs2_free_meta(ip, bstart, blen);
  			bstart = bn;
  			blen = 1;
  		}
  
  		*eablk = 0;

  		gfs2_add_inode_blocks(&ip->i_inode, -1);

  	}
  	if (bstart)
  		gfs2_free_meta(ip, bstart, blen);

  	ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT;

  
  	error = gfs2_meta_inode_buffer(ip, &dibh);
  	if (!error) {

  		gfs2_trans_add_bh(ip->i_gl, dibh, 1);

  		gfs2_dinode_out(ip, dibh->b_data);

  		brelse(dibh);
  	}
  
  	gfs2_trans_end(sdp);

  out_gunlock:

  	gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);

  out_rlist_free:

  	gfs2_rlist_free(&rlist);

  out:

  	brelse(indbh);

  	return error;
  }
  
  static int ea_dealloc_block(struct gfs2_inode *ip)
  {

  	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);

  	struct gfs2_rgrpd *rgd;
  	struct buffer_head *dibh;

  	struct gfs2_holder gh;

  	int error;

  	rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr);

  	if (!rgd) {
  		gfs2_consist_inode(ip);
  		return -EIO;
  	}

  	error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh);

  	if (error)
  		return error;

  	error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS +
  				 RES_QUOTA, 1);

  	if (error)
  		goto out_gunlock;

  	gfs2_free_meta(ip, ip->i_eattr, 1);

  	ip->i_eattr = 0;

  	gfs2_add_inode_blocks(&ip->i_inode, -1);

  
  	error = gfs2_meta_inode_buffer(ip, &dibh);
  	if (!error) {

  		gfs2_trans_add_bh(ip->i_gl, dibh, 1);

  		gfs2_dinode_out(ip, dibh->b_data);

  		brelse(dibh);
  	}
  
  	gfs2_trans_end(sdp);

  out_gunlock:

  	gfs2_glock_dq_uninit(&gh);

  	return error;
  }
  
  /**
   * gfs2_ea_dealloc - deallocate the extended attribute fork
   * @ip: the inode
   *
   * Returns: errno
   */
  
  int gfs2_ea_dealloc(struct gfs2_inode *ip)
  {

  	struct gfs2_qadata *qa;

  	int error;

  	qa = gfs2_qadata_get(ip);
  	if (!qa)

  		return -ENOMEM;

  
  	error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
  	if (error)
  		goto out_alloc;

  	error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
  	if (error)

  		goto out_quota;

  	if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {

  		error = ea_dealloc_indirect(ip);
  		if (error)

  			goto out_quota;

  	}
  
  	error = ea_dealloc_block(ip);

  out_quota:

  	gfs2_quota_unhold(ip);

  out_alloc:

  	gfs2_qadata_put(ip);

  	return error;
  }

  static const struct xattr_handler gfs2_xattr_user_handler = {

  	.prefix = XATTR_USER_PREFIX,

  	.flags  = GFS2_EATYPE_USR,
  	.get    = gfs2_xattr_get,
  	.set    = gfs2_xattr_set,

  };

  static const struct xattr_handler gfs2_xattr_security_handler = {

  	.prefix = XATTR_SECURITY_PREFIX,

  	.flags  = GFS2_EATYPE_SECURITY,
  	.get    = gfs2_xattr_get,
  	.set    = gfs2_xattr_set,

  };

  const struct xattr_handler *gfs2_xattr_handlers[] = {

  	&gfs2_xattr_user_handler,
  	&gfs2_xattr_security_handler,
  	&gfs2_xattr_system_handler,
  	NULL,
  };