#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>
#include <linux/spinlock.h>
#include <linux/semaphore.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <asm/uaccess.h>
#include <linux/xattr.h>
#include <linux/posix_acl.h>

#include "gfs.h"
#include "acl.h"
#include "dio.h"
#include "eaops.h"
#include "eattr.h"
#include "glock.h"
#include "inode.h"
#include "quota.h"
#include "rgrp.h"
#include "trans.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: TRUE if the EA should be stuffed
 */

static int
ea_calc_size(struct gfs_sbd *sdp,
	    struct gfs_ea_request *er,
	    unsigned int *size)
{
	*size = GFS_EAREQ_SIZE_STUFFED(er);
	if (*size <= sdp->sd_jbsize)
		return TRUE;

	*size = GFS_EAREQ_SIZE_UNSTUFFED(sdp, er);
	return FALSE;
}

/**
 * gfs_ea_check_size - 
 * @ip:
 * @er:
 *
 * Returns: errno
 */

int
gfs_ea_check_size(struct gfs_sbd *sdp, struct gfs_ea_request *er)
{
	unsigned int size;

	if (er->er_data_len > GFS_EA_MAX_DATA_LEN)
		return -ERANGE;

	ea_calc_size(sdp, er, &size);
	if (size > sdp->sd_jbsize)
		return -ERANGE; /* This can only happen with 512 byte blocks */

	return 0;
}

typedef int (*ea_call_t) (struct gfs_inode *ip,
			  struct buffer_head *bh,
			  struct gfs_ea_header *ea,
			  struct gfs_ea_header *prev,
			  void *private);

/**
 * ea_foreach_i -
 * @ip:
 * @bh:
 * @eabc:
 * @data:
 *
 * Returns: errno
 */

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

	if (gfs_metatype_check(ip->i_sbd, bh, GFS_METATYPE_EA))
		return -EIO;

	for (ea = GFS_EA_BH2FIRST(bh);; prev = ea, ea = GFS_EA2NEXT(ea)) {
		if (!GFS_EA_REC_LEN(ea))
			goto fail;
		if (!(bh->b_data <= (char *)ea &&
		      (char *)GFS_EA2NEXT(ea) <=
		      bh->b_data + bh->b_size))
			goto fail;
		if (!GFS_EATYPE_VALID(ea->ea_type))
			goto fail;

		error = ea_call(ip, bh, ea, prev, data);
		if (error)
			return error;

		if (GFS_EA_IS_LAST(ea)) {
			if ((char *)GFS_EA2NEXT(ea) !=
			    bh->b_data + bh->b_size)
				goto fail;
			break;
		}
	}

	return error;

 fail:
	gfs_consist_inode(ip);
	return -EIO;
}

/**
 * ea_foreach -
 * @ip:
 * @ea_call:
 * @data:
 *
 * Returns: errno
 */

static int
ea_foreach(struct gfs_inode *ip,
	   ea_call_t ea_call,
	   void *data)
{
	struct buffer_head *bh;
	int error;

	error = gfs_dread(ip->i_gl, ip->i_di.di_eattr,
			  DIO_START | DIO_WAIT, &bh);
	if (error)
		return error;

	if (!(ip->i_di.di_flags & GFS_DIF_EA_INDIRECT))
		error = ea_foreach_i(ip, bh, ea_call, data);
	else {
		struct buffer_head *eabh;
		uint64_t *eablk, *end;

		if (gfs_metatype_check(ip->i_sbd, bh, GFS_METATYPE_IN)) {
			error = -EIO;
			goto out;
		}

		eablk = (uint64_t *)(bh->b_data + sizeof(struct gfs_indirect));
		end = eablk + ip->i_sbd->sd_inptrs;

		for (; eablk < end; eablk++) {
			uint64_t bn;

			if (!*eablk)
				break;
			bn = gfs64_to_cpu(*eablk);

			error = gfs_dread(ip->i_gl, bn,
					  DIO_START | 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 {
	struct gfs_ea_request *ef_er;
	struct gfs_ea_location *ef_el;
};

/**
 * ea_find_i -
 * @ip:
 * @bh:
 * @ea:
 * @prev:
 * @private:
 *
 * Returns: -errno on error, 1 if search is over,
 *          0 if search should continue
 */

static int
ea_find_i(struct gfs_inode *ip,
	  struct buffer_head *bh,
	  struct gfs_ea_header *ea,
	  struct gfs_ea_header *prev,
	  void *private)
{
	struct ea_find *ef = (struct ea_find *)private;
	struct gfs_ea_request *er = ef->ef_er;

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

	if (ea->ea_type == er->er_type) {
		if (ea->ea_name_len == er->er_name_len &&
		    !memcmp(GFS_EA2NAME(ea), er->er_name, ea->ea_name_len)) {
			struct gfs_ea_location *el = ef->ef_el;
			get_bh(bh);
			el->el_bh = bh;
			el->el_ea = ea;
			el->el_prev = prev;
			return 1;
		}
	}

#if 0
	else if ((ip->i_di.di_flags & GFS_DIF_EA_PACKED) &&
		 er->er_type == GFS_EATYPE_SYS)
		return 1;
#endif

	return 0;
}

/**
 * gfs_ea_find - find a matching eattr
 * @ip:
 * @er:
 * @el:
 *
 * Returns: errno
 */

int
gfs_ea_find(struct gfs_inode *ip,
	    struct gfs_ea_request *er,
	    struct gfs_ea_location *el)
{
	struct ea_find ef;
	int error;

	ef.ef_er = er;
	ef.ef_el = el;

	memset(el, 0, sizeof(struct gfs_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 gfs_inode *ip,
		     struct buffer_head *bh,
		     struct gfs_ea_header *ea,
		     struct gfs_ea_header *prev,
		     void *private)
{
	int *leave = (int *)private;
	struct gfs_sbd *sdp = ip->i_sbd;
	struct gfs_rgrpd *rgd;
	struct gfs_holder rg_gh;
	struct buffer_head *dibh;
	uint64_t *dataptrs, bn = 0;
	uint64_t bstart = 0;
	unsigned int blen = 0;
	unsigned int x;
	int error;

	if (GFS_EA_IS_STUFFED(ea))
		return 0;

	dataptrs = GFS_EA2DATAPTRS(ea);
	for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++)
		if (*dataptrs) {
			bn = gfs64_to_cpu(*dataptrs);
			break;
		}
	if (!bn)
		return 0;

	rgd = gfs_blk2rgrpd(sdp, bn);
	if (!rgd) {
		gfs_consist_inode(ip);
		return -EIO;
	}

	error = gfs_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
	if (error)
		return error;

	error = gfs_trans_begin(sdp, 2 + rgd->rd_ri.ri_length, 1);
	if (error)
		goto out_gunlock;

	gfs_trans_add_bh(ip->i_gl, bh);

	dataptrs = GFS_EA2DATAPTRS(ea);
	for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
		if (!*dataptrs)
			break;
		bn = gfs64_to_cpu(*dataptrs);

		if (bstart + blen == bn)
			blen++;
		else {
			if (bstart)
				gfs_metafree(ip, bstart, blen);
			bstart = bn;
			blen = 1;
		}

		*dataptrs = 0;
		if (!ip->i_di.di_blocks)
			gfs_consist_inode(ip);
		ip->i_di.di_blocks--;
	}
	if (bstart)
		gfs_metafree(ip, bstart, blen);

	if (prev && !leave) {
		uint32_t len;

		len = GFS_EA_REC_LEN(prev) + GFS_EA_REC_LEN(ea);
		prev->ea_rec_len = cpu_to_gfs32(len);

		if (GFS_EA_IS_LAST(ea))
			prev->ea_flags |= GFS_EAFLAG_LAST;
	} else {
		ea->ea_type = GFS_EATYPE_UNUSED;
		ea->ea_num_ptrs = 0;
	}

	error = gfs_get_inode_buffer(ip, &dibh);
	if (!error) {
		ip->i_di.di_ctime = get_seconds();
		gfs_trans_add_bh(ip->i_gl, dibh);
		gfs_dinode_out(&ip->i_di, dibh->b_data);
		brelse(dibh);
	}

	gfs_trans_end(sdp);

 out_gunlock:
	gfs_glock_dq_uninit(&rg_gh);

	return error;
}

/**
 * ea_remove_unstuffed -
 * @ip:
 * @bh:
 * @ea:
 * @prev:
 * @leave:
 *
 * Returns: errno
 */

static int
ea_remove_unstuffed(struct gfs_inode *ip,
		    struct buffer_head *bh,
		    struct gfs_ea_header *ea,
		    struct gfs_ea_header *prev,
		    int leave)
{
	struct gfs_alloc *al;
	int error;

	al = gfs_alloc_get(ip);

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

	error = gfs_rindex_hold(ip->i_sbd, &al->al_ri_gh);
	if (error)
		goto out_quota;

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

	gfs_glock_dq_uninit(&al->al_ri_gh);

 out_quota:
	gfs_quota_unhold_m(ip);

 out_alloc:
	gfs_alloc_put(ip);

	return error;
}

/**************************************************************************************************/

/**
 * gfs_ea_repack_i -
 * @ip:
 *
 * Returns: errno
 */

int
gfs_ea_repack_i(struct gfs_inode *ip)
{
	return -ENOSYS;
}

/**
 * gfs_ea_repack -
 * @ip:
 *
 * Returns: errno
 */

int gfs_ea_repack(struct gfs_inode *ip)
{
	struct gfs_holder gh;
	int error;

	error = gfs_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
	if (error)
		return error;

	/* Some sort of permissions checking would be nice */

	error = gfs_ea_repack_i(ip);

	gfs_glock_dq_uninit(&gh);

	return error;
}

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

/**
 * ea_list_i -
 * @ip:
 * @bh:
 * @ea:
 * @prev:
 * @private:
 *
 * Returns: errno
 */

static int
ea_list_i(struct gfs_inode *ip,
	  struct buffer_head *bh,
	  struct gfs_ea_header *ea,
	  struct gfs_ea_header *prev,
	  void *private)
{
	struct ea_list *ei = (struct ea_list *)private;
	struct gfs_ea_request *er = ei->ei_er;
	unsigned int ea_size = gfs_ea_strlen(ea);

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

	if (er->er_data_len) {
		char *prefix;
		unsigned int l;
		char c = 0;

		if (ei->ei_size + ea_size > er->er_data_len)
			return -ERANGE;

		switch (ea->ea_type) {
		case GFS_EATYPE_USR:
			prefix = "user.";
			l = 5;
			break;
		case GFS_EATYPE_SYS:
			prefix = "system.";
			l = 7;
			break;
		case GFS_EATYPE_SECURITY:
			prefix = "security.";
			l = 9;
			break;
		default:
			prefix = NULL;
			l = 0;
			break;
		}

		if (prefix == NULL || l == 0)
			return -EIO;

		memcpy(er->er_data + ei->ei_size,
		       prefix, l);
		memcpy(er->er_data + ei->ei_size + l,
		       GFS_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;
}

/**
 * gfs_ea_list -
 * @ip:
 * @er:
 *
 * Returns: actual size of data on success, -errno on error
 */

int
gfs_ea_list(struct gfs_inode *ip, struct gfs_ea_request *er)
{
	struct gfs_holder i_gh;
	int error;

	if (!er->er_data || !er->er_data_len) {
		er->er_data = NULL;
		er->er_data_len = 0;
	}

	error = gfs_glock_nq_init(ip->i_gl,
				  LM_ST_SHARED, LM_FLAG_ANY,
				  &i_gh);
	if (error)
		return error;

	if (ip->i_di.di_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;
	}

	gfs_glock_dq_uninit(&i_gh);

	return error;
}

/**
 * ea_get_unstuffed - actually copies the unstuffed data into the
 *                    request buffer
 * @ip:
 * @ea:
 * @data:
 *
 * Returns: errno
 */

static int
ea_get_unstuffed(struct gfs_inode *ip, struct gfs_ea_header *ea,
		 char *data)
{
	struct gfs_sbd *sdp = ip->i_sbd;
	struct buffer_head **bh;
	unsigned int amount = GFS_EA_DATA_LEN(ea);
	unsigned int nptrs = DIV_RU(amount, sdp->sd_jbsize);
	uint64_t *dataptrs = GFS_EA2DATAPTRS(ea);
	unsigned int x;
	int error = 0;

	bh = kmalloc(nptrs * sizeof(struct buffer_head *), GFP_NOFS);
	if (!bh)
		return -ENOMEM;

	for (x = 0; x < nptrs; x++) {
		error = gfs_dread(ip->i_gl, gfs64_to_cpu(*dataptrs),
				  DIO_START, bh + x);
		if (error) {
			while (x--)
				brelse(bh[x]);
			goto out;
		}
		dataptrs++;
	}

	for (x = 0; x < nptrs; x++) {
		error = gfs_dreread(sdp, bh[x], DIO_WAIT);
		if (error) {
			for (; x < nptrs; x++)
				brelse(bh[x]);
			goto out;
		}
		if (gfs_metatype_check2(sdp, bh[x],
					GFS_METATYPE_ED, GFS_METATYPE_EA)) {
			for (; x < nptrs; x++)
				brelse(bh[x]);
			error = -EIO;
			goto out;
		}

		memcpy(data,
		       bh[x]->b_data + sizeof(struct gfs_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;
}

/**
 * gfs_ea_get_copy -
 * @ip:
 * @el:
 * @data:
 *
 * Returns: errno
 */

int
gfs_ea_get_copy(struct gfs_inode *ip,
		struct gfs_ea_location *el,
		char *data)
{
	if (GFS_EA_IS_STUFFED(el->el_ea)) {
		memcpy(data,
		       GFS_EA2DATA(el->el_ea),
		       GFS_EA_DATA_LEN(el->el_ea));
		return 0;
	} else
		return ea_get_unstuffed(ip, el->el_ea, data);
}

/**
 * gfs_ea_get_i -
 * @ip:
 * @er:
 *
 * Returns: actual size of data on success, -errno on error
 */

int
gfs_ea_get_i(struct gfs_inode *ip, struct gfs_ea_request *er)
{
	struct gfs_ea_location el;
	int error;

	if (!ip->i_di.di_eattr)
		return -ENODATA;

	error = gfs_ea_find(ip, er, &el);
	if (error)
		return error;
	if (!el.el_ea)
		return -ENODATA;

	if (er->er_data_len) {
		if (GFS_EA_DATA_LEN(el.el_ea) > er->er_data_len)
			error =  -ERANGE;
		else
			error = gfs_ea_get_copy(ip, &el, er->er_data);
	}
	if (!error)
		error = GFS_EA_DATA_LEN(el.el_ea);

	brelse(el.el_bh);

	return error;
}

/**
 * gfs_ea_get -
 * @ip:
 * @er:
 *
 * Returns: actual size of data on success, -errno on error
 */

int
gfs_ea_get(struct gfs_inode *ip, struct gfs_ea_request *er)
{
	struct gfs_holder i_gh;
	int error;

	if (!er->er_name_len ||
	    er->er_name_len > GFS_EA_MAX_NAME_LEN)
		return -EINVAL;
	if (!er->er_data || !er->er_data_len) {
		er->er_data = NULL;
		er->er_data_len = 0;
	}

	error = gfs_glock_nq_init(ip->i_gl,
				  LM_ST_SHARED, LM_FLAG_ANY,
				  &i_gh);
	if (error)
		return error;

	error = gfs_ea_ops[er->er_type]->eo_get(ip, er);

	gfs_glock_dq_uninit(&i_gh);

	return error;
}

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

static int
ea_alloc_blk(struct gfs_inode *ip,
	     struct buffer_head **bhp)
{
	struct gfs_sbd *sdp = ip->i_sbd;
	struct gfs_ea_header *ea;
	uint64_t block;
	int error;

	error = gfs_metaalloc(ip, &block);
	if (error)
		return error;

	error = gfs_dread(ip->i_gl, block,
			  DIO_NEW | DIO_START | DIO_WAIT, bhp);
	if (error)
		return error;

	gfs_trans_add_bh(ip->i_gl, *bhp);
	gfs_metatype_set(*bhp, GFS_METATYPE_EA, GFS_FORMAT_EA);

	ea = GFS_EA_BH2FIRST(*bhp);
	ea->ea_rec_len = cpu_to_gfs32(sdp->sd_jbsize);
	ea->ea_type = GFS_EATYPE_UNUSED;
	ea->ea_flags = GFS_EAFLAG_LAST;
	ea->ea_num_ptrs = 0;

	ip->i_di.di_blocks++;

	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 GFS_EAFLAG_LAST bin of ea_flags
 *
 * returns : errno
 */

static int
ea_write(struct gfs_inode *ip,
	 struct gfs_ea_header *ea,
	 struct gfs_ea_request *er)
{
	struct gfs_sbd *sdp = ip->i_sbd;

	ea->ea_data_len = cpu_to_gfs32(er->er_data_len);
	ea->ea_name_len = er->er_name_len;
	ea->ea_type = er->er_type;
	ea->ea_pad = 0;

	memcpy(GFS_EA2NAME(ea), er->er_name, er->er_name_len);

	if (GFS_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
		ea->ea_num_ptrs = 0;
		memcpy(GFS_EA2DATA(ea), er->er_data, er->er_data_len);
	} else {
		uint64_t *dataptr = GFS_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_RU(er->er_data_len, sdp->sd_jbsize);
		for (x = 0; x < ea->ea_num_ptrs; x++) {
			struct buffer_head *bh;
			uint64_t block;
			int error;

			error = gfs_metaalloc(ip, &block);
			if (error)
				return error;

			error = gfs_dread(ip->i_gl, block,
					  DIO_NEW | DIO_START | DIO_WAIT, &bh);
			if (error)
				return error;

			gfs_trans_add_bh(ip->i_gl, bh);
			gfs_metatype_set(bh, GFS_METATYPE_ED, GFS_FORMAT_ED);
			ip->i_di.di_blocks++;

			copy = (data_len > sdp->sd_jbsize) ? sdp->sd_jbsize : data_len;
			memcpy(bh->b_data + sizeof(struct gfs_meta_header),
			       data,
			       copy);

			*dataptr++ = cpu_to_gfs64((uint64_t)bh->b_blocknr);
			data += copy;
			data_len -= copy;

			brelse(bh);
		}

		gfs_assert_withdraw(sdp, !data_len);
	}

	return 0;
}

typedef int (*ea_skeleton_call_t) (struct gfs_inode *ip,
				   struct gfs_ea_request *er,
				   void *private);
/**
 * ea_alloc_skeleton -
 * @ip:
 * @er:
 * @blks:
 * @skeleton_call:
 * @private:
 *
 * Returns: errno
 */

static int
ea_alloc_skeleton(struct gfs_inode *ip, struct gfs_ea_request *er,
		  unsigned int blks,
		  ea_skeleton_call_t skeleton_call, void *private)
{
	struct gfs_alloc *al;
	struct buffer_head *dibh;
	int error;

	al = gfs_alloc_get(ip);

	error = gfs_quota_lock_m(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
	if (error)
		goto out;

	error = gfs_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid);
	if (error)
		goto out_gunlock_q;

	al->al_requested_meta = blks;

	error = gfs_inplace_reserve(ip);
	if (error)
		goto out_gunlock_q;

	/* Trans may require:
	   A modified dinode, multiple EA metadata blocks, and all blocks for a RG
	   bitmap */

	error = gfs_trans_begin(ip->i_sbd,
				1 + blks + al->al_rgd->rd_ri.ri_length, 1);
	if (error)
		goto out_ipres;

	error = skeleton_call(ip, er, private);
	if (error)
		goto out_end_trans;

	error = gfs_get_inode_buffer(ip, &dibh);
	if (!error) {
		if (er->er_mode) {
			ip->i_vnode->i_mode = er->er_mode;
			gfs_inode_attr_out(ip);
		}
		ip->i_di.di_ctime = get_seconds();
		gfs_trans_add_bh(ip->i_gl, dibh);
		gfs_dinode_out(&ip->i_di, dibh->b_data);
		brelse(dibh);
	}

 out_end_trans:
	gfs_trans_end(ip->i_sbd);

 out_ipres:
	gfs_inplace_release(ip);

 out_gunlock_q:
	gfs_quota_unlock_m(ip);

 out:
	gfs_alloc_put(ip);

	return error;
}

/**
 * ea_init_i - initializes a new eattr block
 * @ip:
 * @er:
 * @private:
 *
 * Returns: errno
 */

static int
ea_init_i(struct gfs_inode *ip,
	  struct gfs_ea_request *er,
	  void *private)
{
	struct buffer_head *bh;
	int error;

	error = ea_alloc_blk(ip, &bh);
	if (error)
		return error;

	ip->i_di.di_eattr = bh->b_blocknr;
	error = ea_write(ip, GFS_EA_BH2FIRST(bh), er);

	brelse(bh);

	return error;
}

/**
 * ea_init - initializes a new eattr block
 * @ip:
 * @er:
 *
 * Returns: errno
 */

static int
ea_init(struct gfs_inode *ip, struct gfs_ea_request *er)
{
	unsigned int jbsize = ip->i_sbd->sd_jbsize;
	unsigned int blks = 1;

	if (GFS_EAREQ_SIZE_STUFFED(er) > jbsize)
		blks += DIV_RU(er->er_data_len, jbsize);

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

/**
 * ea_split_ea -
 * @ea:
 *
 * Returns: the new ea
 */

static struct gfs_ea_header *
ea_split_ea(struct gfs_ea_header *ea)
{
	uint32_t ea_size = GFS_EA_SIZE(ea);
	struct gfs_ea_header *new = (struct gfs_ea_header *)((char *)ea + ea_size);
	uint32_t new_size = GFS_EA_REC_LEN(ea) - ea_size;
	int last = ea->ea_flags & GFS_EAFLAG_LAST;

	ea->ea_rec_len = cpu_to_gfs32(ea_size);
	ea->ea_flags ^= last;

	new->ea_rec_len = cpu_to_gfs32(new_size);
	new->ea_flags = last;

	return new;
}

/**
 * ea_set_remove_stuffed -
 * @ip:
 * @ea:
 *
 */

static void
ea_set_remove_stuffed(struct gfs_inode *ip, struct gfs_ea_location *el)
{
	struct gfs_ea_header *ea = el->el_ea;
	struct gfs_ea_header *prev = el->el_prev;
	uint32_t len;

	gfs_trans_add_bh(ip->i_gl, el->el_bh);

	if (!prev || !GFS_EA_IS_STUFFED(ea)) {
		ea->ea_type = GFS_EATYPE_UNUSED;
		return;
	} else if (GFS_EA2NEXT(prev) != ea) {
		prev = GFS_EA2NEXT(prev);
		gfs_assert_withdraw(ip->i_sbd, GFS_EA2NEXT(prev) == ea);
	}

	len = GFS_EA_REC_LEN(prev) + GFS_EA_REC_LEN(ea);
	prev->ea_rec_len = cpu_to_gfs32(len);

	if (GFS_EA_IS_LAST(ea))
		prev->ea_flags |= GFS_EAFLAG_LAST;
}

struct ea_set {
	int ea_split;

	struct gfs_ea_request *es_er;
	struct gfs_ea_location *es_el;

	struct buffer_head *es_bh;
	struct gfs_ea_header *es_ea;
};

/**
 * ea_set_simple_noalloc -
 * @ip:
 * @ea:
 * @es:
 *
 * Returns: errno
 */

static int
ea_set_simple_noalloc(struct gfs_inode *ip,
		      struct buffer_head *bh,
		      struct gfs_ea_header *ea,
		      struct ea_set *es)
{
	struct gfs_ea_request *er = es->es_er;
	int error;

	error = gfs_trans_begin(ip->i_sbd, 3, 0);
	if (error)
		return error;

	gfs_trans_add_bh(ip->i_gl, bh);

	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);

	{
		struct buffer_head *dibh;
		error = gfs_get_inode_buffer(ip, &dibh);
		if (!error) {
			if (er->er_mode) {
				ip->i_vnode->i_mode = er->er_mode;
				gfs_inode_attr_out(ip);
			}
			ip->i_di.di_ctime = get_seconds();
			gfs_trans_add_bh(ip->i_gl, dibh);
			gfs_dinode_out(&ip->i_di, dibh->b_data);
			brelse(dibh);
		}	
	}

	gfs_trans_end(ip->i_sbd);

	return error;
}

/**
 * ea_set_simple_alloc -
 * @ip:
 * @er:
 * @private:
 *
 * Returns: errno
 */

static int
ea_set_simple_alloc(struct gfs_inode *ip,
		    struct gfs_ea_request *er,
		    void *private)
{
	struct ea_set *es = (struct ea_set *)private;
	struct gfs_ea_header *ea = es->es_ea;
	int error;

	gfs_trans_add_bh(ip->i_gl, es->es_bh);

	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;
}

/**
 * ea_set_simple -
 * @ip:
 * @el:
 *
 * Returns: errno
 */

static int
ea_set_simple(struct gfs_inode *ip,
	      struct buffer_head *bh,
	      struct gfs_ea_header *ea,
	      struct gfs_ea_header *prev,
	      void *private)
{
	struct ea_set *es = (struct ea_set *)private;
	unsigned int size;
	int stuffed;
	int error;

	stuffed = ea_calc_size(ip->i_sbd, es->es_er, &size);

	if (ea->ea_type == GFS_EATYPE_UNUSED) {
		if (GFS_EA_REC_LEN(ea) < size)
			return 0;
		if (!GFS_EA_IS_STUFFED(ea)) {
			error = ea_remove_unstuffed(ip, bh, ea, prev, TRUE);
			if (error)
				return error;
		}
		es->ea_split = FALSE;
	} else if (GFS_EA_REC_LEN(ea) - GFS_EA_SIZE(ea) >= size)
		es->ea_split = TRUE;
	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_RU(es->es_er->er_data_len,
				  ip->i_sbd->sd_jbsize);

		error = ea_alloc_skeleton(ip, es->es_er,
					  blks,
					  ea_set_simple_alloc, es);
		if (error)
			return error;
	}

	return 1;
}

/**
 * ea_set_block -
 * @ip:
 * @er:
 * @private:
 *
 * Returns: errno
 */

static int
ea_set_block(struct gfs_inode *ip,
	     struct gfs_ea_request *er,
	     void *private)
{
	struct gfs_sbd *sdp = ip->i_sbd;
	struct buffer_head *indbh, *newbh;
	uint64_t *eablk;
	int error;

	if (ip->i_di.di_flags & GFS_DIF_EA_INDIRECT) {
		uint64_t *end;

		error = gfs_dread(ip->i_gl, ip->i_di.di_eattr,
				  DIO_START | DIO_WAIT, &indbh);
		if (error)
			return error;

		if (gfs_metatype_check(sdp, indbh, GFS_METATYPE_IN)) {
			error = -EIO;
			goto out;
		}

		eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs_indirect));
		end = eablk + sdp->sd_inptrs;

		for (; eablk < end; eablk++)
			if (!*eablk)
				break;

		if (eablk == end) {
			error = -ENOSPC;
			goto out;
		}

		gfs_trans_add_bh(ip->i_gl, indbh);
	} else {
		uint64_t blk;

		error = gfs_metaalloc(ip, &blk);
		if (error)
			return error;

		error = gfs_dread(ip->i_gl, blk,
				  DIO_NEW | DIO_START | DIO_WAIT, &indbh);
		if (error)
			return error;

		gfs_trans_add_bh(ip->i_gl, indbh);
		gfs_metatype_set(indbh, GFS_METATYPE_IN, GFS_FORMAT_IN);
		gfs_buffer_clear_tail(indbh, sizeof(struct gfs_meta_header));

		eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs_indirect));
		*eablk = cpu_to_gfs64(ip->i_di.di_eattr);
		ip->i_di.di_eattr = blk;
		ip->i_di.di_flags |= GFS_DIF_EA_INDIRECT;
		ip->i_di.di_blocks++;

		eablk++;
	}

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

	*eablk = cpu_to_gfs64((uint64_t)newbh->b_blocknr);
	error = ea_write(ip, GFS_EA_BH2FIRST(newbh), er);
	brelse(newbh);
	if (error)
		goto out;

	if (private)
		ea_set_remove_stuffed(ip, (struct gfs_ea_location *)private);

 out:
	brelse(indbh);

	return error;
}

/**
 * ea_set_i -
 * @ip:
 * @el:
 *
 * Returns: errno
 */

static int
ea_set_i(struct gfs_inode *ip,
	 struct gfs_ea_request *er,
	 struct gfs_ea_location *el)
{
	{
		struct ea_set es;
		int error;

		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;
	}
	{
		unsigned int blks = 2;
		if (!(ip->i_di.di_flags & GFS_DIF_EA_INDIRECT))
			blks++;
		if (GFS_EAREQ_SIZE_STUFFED(er) > ip->i_sbd->sd_jbsize)
			blks += DIV_RU(er->er_data_len,
				       ip->i_sbd->sd_jbsize);

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

/**
 * ea_set_remove_unstuffed -
 * @ip:
 * @el:
 *
 * Returns: errno
 */

static int
ea_set_remove_unstuffed(struct gfs_inode *ip, struct gfs_ea_location *el)
{
	if (el->el_prev && GFS_EA2NEXT(el->el_prev) != el->el_ea) {
		el->el_prev = GFS_EA2NEXT(el->el_prev);
		gfs_assert_withdraw(ip->i_sbd,
				    GFS_EA2NEXT(el->el_prev) == el->el_ea);
	}

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

/**
 * gfs_ea_set_i -
 * @ip:
 * @er:
 *
 * Returns: errno
 */

int
gfs_ea_set_i(struct gfs_inode *ip, struct gfs_ea_request *er)
{
	struct gfs_ea_location el;
	int error;

	if (!ip->i_di.di_eattr) {
		if (er->er_flags & XATTR_REPLACE)
			return -ENODATA;
		return ea_init(ip, er);
	}

	error = gfs_ea_find(ip, er, &el);
	if (error)
		return error;

	if (el.el_ea) {
		if (IS_APPEND(ip->i_vnode)) {
			brelse(el.el_bh);
			return -EPERM;
		}

		error = -EEXIST;
		if (!(er->er_flags & XATTR_CREATE)) {
			int unstuffed = !GFS_EA_IS_STUFFED(el.el_ea);
			error = ea_set_i(ip, er, &el);
			if (!error && unstuffed)
				ea_set_remove_unstuffed(ip, &el);
		}

		brelse(el.el_bh);
	} else {
		error = -ENODATA;
		if (!(er->er_flags & XATTR_REPLACE))
			error = ea_set_i(ip, er, NULL);
	}

	return error;
}

/**
 * gfs_ea_set -
 * @ip:
 * @er:
 *
 * Returns: errno
 */

int
gfs_ea_set(struct gfs_inode *ip, struct gfs_ea_request *er)
{
	struct gfs_holder i_gh;
	int error;

	if (!er->er_name_len ||
	    er->er_name_len > GFS_EA_MAX_NAME_LEN)
		return -EINVAL;
	if (!er->er_data || !er->er_data_len) {
		er->er_data = NULL;
		er->er_data_len = 0;
	}
	error = gfs_ea_check_size(ip->i_sbd, er);
	if (error)
		return error;

	error = gfs_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
	if (error)
		return error;

	if (IS_IMMUTABLE(ip->i_vnode))
		error = -EPERM;
	else
		error = gfs_ea_ops[er->er_type]->eo_set(ip, er);

	gfs_glock_dq_uninit(&i_gh);

	return error;
}

/**
 * ea_remove_stuffed -
 * @ip:
 * @el:
 * @mode:
 *
 * Returns: errno
 */

static int
ea_remove_stuffed(struct gfs_inode *ip,
		  struct gfs_ea_location *el)
{
	struct gfs_ea_header *ea = el->el_ea;
	struct gfs_ea_header *prev = el->el_prev;
	int error;

	error = gfs_trans_begin(ip->i_sbd, 2, 0);
	if (error)
		return error;

	gfs_trans_add_bh(ip->i_gl, el->el_bh);

	if (prev) {
		uint32_t len;

		len = GFS_EA_REC_LEN(prev) + GFS_EA_REC_LEN(ea);
		prev->ea_rec_len = cpu_to_gfs32(len);

		if (GFS_EA_IS_LAST(ea))
			prev->ea_flags |= GFS_EAFLAG_LAST;
	} else
		ea->ea_type = GFS_EATYPE_UNUSED;

	{
		struct buffer_head *dibh;
		error = gfs_get_inode_buffer(ip, &dibh);
		if (!error) {
			ip->i_di.di_ctime = get_seconds();
			gfs_trans_add_bh(ip->i_gl, dibh);
			gfs_dinode_out(&ip->i_di, dibh->b_data);
			brelse(dibh);
		}	
	}

	gfs_trans_end(ip->i_sbd);

	return error;
}

/**
 * gfs_ea_remove_i -
 * @ip:
 * @er:
 *
 * Returns: errno
 */

int
gfs_ea_remove_i(struct gfs_inode *ip, struct gfs_ea_request *er)
{
	struct gfs_ea_location el;
	int error;

	if (!ip->i_di.di_eattr)
		return -ENODATA;

	error = gfs_ea_find(ip, er, &el);
	if (error)
		return error;
	if (!el.el_ea)
		return -ENODATA;

	if (GFS_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, FALSE);

	brelse(el.el_bh);

	return error;
}

/**
 * gfs_ea_remove - sets (or creates or replaces) an extended attribute
 * @ip: pointer to the inode of the target file
 * @er: request information
 *
 * Returns: errno
 */

int
gfs_ea_remove(struct gfs_inode *ip, struct gfs_ea_request *er)
{
	struct gfs_holder i_gh;
	int error;

	if (!er->er_name_len ||
	    er->er_name_len > GFS_EA_MAX_NAME_LEN)
		return -EINVAL;

	error = gfs_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
	if (error)
		return error;

	if (IS_IMMUTABLE(ip->i_vnode) || IS_APPEND(ip->i_vnode))
		error = -EPERM;
	else
		error = gfs_ea_ops[er->er_type]->eo_remove(ip, er);

	gfs_glock_dq_uninit(&i_gh);

	return error;
}

/**
 * gfs_ea_acl_init -
 * @ip:
 * @er:
 *
 * Returns: errno
 */

int gfs_ea_acl_init(struct gfs_inode *ip, struct gfs_ea_request *er)
{
	struct buffer_head *bh;
	struct gfs_ea_header *ea;
	unsigned int size;
	struct buffer_head *dibh;
	int error;

	if (!ip->i_di.di_eattr)
		return ea_init_i(ip, er, NULL);

	ea_calc_size(ip->i_sbd, er, &size);

	error = gfs_dread(ip->i_gl, ip->i_di.di_eattr,
				  DIO_START | DIO_WAIT, &bh);
	if (error)
		return error;

	if (gfs_metatype_check(ip->i_sbd, bh, GFS_METATYPE_EA)) {
		brelse(bh);
		return -EIO;
	}

	ea = GFS_EA_BH2FIRST(bh);
	if (GFS_EA_REC_LEN(ea) - GFS_EA_SIZE(ea) >= size) {
		ea = ea_split_ea(ea);
		ea_write(ip, ea, er);
		brelse(bh);
		return 0;
	}

	brelse(bh);

	error = ea_set_block(ip, er, NULL);
	gfs_assert_withdraw(ip->i_sbd, error != -ENOSPC);
	if (error)
		return error;

	error = gfs_get_inode_buffer(ip, &dibh);
	if (error)
		return error;
	gfs_dinode_out(&ip->i_di, dibh->b_data);
	brelse(dibh);
	return error;
}

/**
 * ea_acl_chmod_unstuffed -
 * @ip:
 * @ea:
 * @data:
 *
 * Returns: errno
 */

static int ea_acl_chmod_unstuffed(struct gfs_inode *ip,
				  struct gfs_ea_header *ea, char *data,
				  int *trans)
{
	struct gfs_sbd *sdp = ip->i_sbd;
	struct buffer_head **bh;
	unsigned int amount = GFS_EA_DATA_LEN(ea);
	unsigned int nptrs = DIV_RU(amount, sdp->sd_jbsize);
	uint64_t *dataptrs = GFS_EA2DATAPTRS(ea);
	unsigned int x;
	int error;

	bh = kmalloc(nptrs * sizeof(struct buffer_head *), GFP_NOFS);
	if (!bh)
		return -ENOMEM;

	if (get_transaction == NULL) {
		error = gfs_trans_begin(sdp, 1 + nptrs, 0);
		if (error)
			goto out;
		*trans = 1;
	}

	for (x = 0; x < nptrs; x++) {
		error = gfs_dread(ip->i_gl, gfs64_to_cpu(*dataptrs),
				  DIO_START, bh + x);
		if (error) {
			while (x--)
				brelse(bh[x]);
			goto fail;
		}
		dataptrs++;
	}

	for (x = 0; x < nptrs; x++) {
		error = gfs_dreread(sdp, bh[x], DIO_WAIT);
		if (error) {
			for (; x < nptrs; x++)
				brelse(bh[x]);
			goto fail;
		}
		if (gfs_metatype_check2(sdp, bh[x],
					GFS_METATYPE_ED, GFS_METATYPE_EA)) {
			for (; x < nptrs; x++)
				brelse(bh[x]);
			error = -EIO;
			goto fail;
		}

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

		memcpy(bh[x]->b_data + sizeof(struct gfs_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:
	gfs_trans_end(sdp);
	*trans = 0;
	kfree(bh);
	return error;
}

/**
 * gfs_ea_acl_chmod -
 * @ip:
 * @el:
 * @attr:
 * @data:
 *
 * Returns: errno
 */

int gfs_ea_acl_chmod(struct gfs_inode *ip, struct gfs_ea_location *el,
		     struct iattr *attr, char *data)
{
	struct gfs_sbd *sdp = ip->i_sbd;
	struct buffer_head *dibh;
	int error;
	int trans = 0;

	if (GFS_EA_IS_STUFFED(el->el_ea)) {
		if (get_transaction == NULL) {
			error = gfs_trans_begin(ip->i_sbd, 2, 0);
			if (error)
				return error;
			trans = 1;
		}

		gfs_trans_add_bh(ip->i_gl, el->el_bh);
		memcpy(GFS_EA2DATA(el->el_ea), data,
		       GFS_EA_DATA_LEN(el->el_ea));
	} else {
		error = ea_acl_chmod_unstuffed(ip, el->el_ea, data, &trans);
	}

	if (error)
		return error;

	error = gfs_get_inode_buffer(ip, &dibh);
	if (!error) {
		error = inode_setattr(ip->i_vnode, attr);
		gfs_assert_warn(ip->i_sbd, !error);
		gfs_inode_attr_out(ip);
		gfs_trans_add_bh(ip->i_gl, dibh);
		gfs_dinode_out(&ip->i_di, dibh->b_data);
		brelse(dibh);
	}

	if (trans)
		gfs_trans_end(ip->i_sbd);

	return error;
}

/**
 * ea_dealloc_indirect -
 * @ip:
 *
 * Returns: errno
 */

static int
ea_dealloc_indirect(struct gfs_inode *ip)
{
	struct gfs_sbd *sdp = ip->i_sbd;
	struct gfs_rgrp_list rlist;
	struct buffer_head *indbh, *dibh;
	uint64_t *eablk, *end;
	unsigned int rg_blocks = 0;
	uint64_t bstart = 0;
	unsigned int blen = 0;
	unsigned int x;
	int error;

	memset(&rlist, 0, sizeof(struct gfs_rgrp_list));

	error = gfs_dread(ip->i_gl, ip->i_di.di_eattr,
			  DIO_START | DIO_WAIT, &indbh);
	if (error)
		return error;

	if (gfs_metatype_check(sdp, indbh, GFS_METATYPE_IN)) {
		error = -EIO;
		goto out;
	}

	eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs_indirect));
	end = eablk + sdp->sd_inptrs;

	for (; eablk < end; eablk++) {
		uint64_t bn;

		if (!*eablk)
			break;
		bn = gfs64_to_cpu(*eablk);

		if (bstart + blen == bn)
			blen++;
		else {
			if (bstart)
				gfs_rlist_add(sdp, &rlist, bstart);
			bstart = bn;
			blen = 1;
		}	
	}
	if (bstart)
		gfs_rlist_add(sdp, &rlist, bstart);
	else
		goto out;

	gfs_rlist_alloc(&rlist, LM_ST_EXCLUSIVE, 0);

	for (x = 0; x < rlist.rl_rgrps; x++) {
		struct gfs_rgrpd *rgd;
		rgd = get_gl2rgd(rlist.rl_ghs[x].gh_gl);
		rg_blocks += rgd->rd_ri.ri_length;
	}

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

	error = gfs_trans_begin(sdp, 2 + rg_blocks, 1);
	if (error)
		goto out_gunlock;

	gfs_trans_add_bh(ip->i_gl, indbh);

	eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs_indirect));
	bstart = 0;
	blen = 0;

	for (; eablk < end; eablk++) {
		uint64_t bn;

		if (!*eablk)
			break;
		bn = gfs64_to_cpu(*eablk);

		if (bstart + blen == bn)
			blen++;
		else {
			if (bstart)
				gfs_metafree(ip, bstart, blen);
			bstart = bn;
			blen = 1;
		}

		*eablk = 0;
		if (!ip->i_di.di_blocks)
			gfs_consist_inode(ip);
		ip->i_di.di_blocks--;
	}
	if (bstart)
		gfs_metafree(ip, bstart, blen);

	ip->i_di.di_flags &= ~GFS_DIF_EA_INDIRECT;

	error = gfs_get_inode_buffer(ip, &dibh);
	if (!error) {
		gfs_trans_add_bh(ip->i_gl, dibh);
		gfs_dinode_out(&ip->i_di, dibh->b_data);
		brelse(dibh);
	}

	gfs_trans_end(sdp);

 out_gunlock:
	gfs_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);

 out_rlist_free:
	gfs_rlist_free(&rlist);

 out:
	brelse(indbh);

	return error;
}

/**
 * ea_dealloc_block -
 * @ip:
 *
 * Returns: errno
 */

static int
ea_dealloc_block(struct gfs_inode *ip)
{
	struct gfs_sbd *sdp = ip->i_sbd;
	struct gfs_alloc *al = ip->i_alloc;
	struct gfs_rgrpd *rgd;
	struct buffer_head *dibh;
	int error;

	rgd = gfs_blk2rgrpd(sdp, ip->i_di.di_eattr);
	if (!rgd) {
		gfs_consist_inode(ip);
		return -EIO;
	}

	error = gfs_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &al->al_rgd_gh);
	if (error)
		return error;

	error = gfs_trans_begin(sdp, 1 + rgd->rd_ri.ri_length, 1);
	if (error)
		goto out_gunlock;

	gfs_metafree(ip, ip->i_di.di_eattr, 1);

	ip->i_di.di_eattr = 0;
	if (!ip->i_di.di_blocks)
		gfs_consist_inode(ip);
	ip->i_di.di_blocks--;

	error = gfs_get_inode_buffer(ip, &dibh);
	if (!error) {
		gfs_trans_add_bh(ip->i_gl, dibh);
		gfs_dinode_out(&ip->i_di, dibh->b_data);
		brelse(dibh);
	}

	gfs_trans_end(sdp);

 out_gunlock:
	gfs_glock_dq_uninit(&al->al_rgd_gh);

	return error;
}

/**
 * gfs_ea_dealloc - deallocate the extended attribute fork
 * @ip: the inode
 *
 * Returns: errno
 */

int
gfs_ea_dealloc(struct gfs_inode *ip)
{
	struct gfs_alloc *al;
	int error;

	al = gfs_alloc_get(ip);

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

	error = gfs_rindex_hold(ip->i_sbd, &al->al_ri_gh);
	if (error)
		goto out_quota;

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

	if (ip->i_di.di_flags & GFS_DIF_EA_INDIRECT) {
		error = ea_dealloc_indirect(ip);
		if (error)
			goto out_rindex;
	}

	error = ea_dealloc_block(ip);

 out_rindex:
	gfs_glock_dq_uninit(&al->al_ri_gh);

 out_quota:
	gfs_quota_unhold_m(ip);

 out_alloc:
	gfs_alloc_put(ip);

	return error;
}

/**
 * gfs_get_eattr_meta - return all the eattr blocks of a file
 * @dip: the directory
 * @ub: the structure representing the user buffer to copy to
 *
 * Returns: errno
 */

int
gfs_get_eattr_meta(struct gfs_inode *ip, struct gfs_user_buffer *ub)
{
	struct buffer_head *bh;
	int error;

	error = gfs_dread(ip->i_gl, ip->i_di.di_eattr,
			  DIO_START | DIO_WAIT, &bh);
	if (error)
		return error;

	gfs_add_bh_to_ub(ub, bh);

	if (ip->i_di.di_flags & GFS_DIF_EA_INDIRECT) {
		struct buffer_head *eabh;
		uint64_t *eablk, *end;

		if (gfs_metatype_check(ip->i_sbd, bh, GFS_METATYPE_IN)) {
			error = -EIO;
			goto out;
		}

		eablk = (uint64_t *)(bh->b_data + sizeof(struct gfs_indirect));
		end = eablk + ip->i_sbd->sd_inptrs;

		for (; eablk < end; eablk++) {
			uint64_t bn;

			if (!*eablk)
				break;
			bn = gfs64_to_cpu(*eablk);

			error = gfs_dread(ip->i_gl, bn,
					  DIO_START | DIO_WAIT, &eabh);
			if (error)
				break;
			gfs_add_bh_to_ub(ub, eabh);
			brelse(eabh);
			if (error)
				break;
		}
	}

 out:
	brelse(bh);

	return error;
}
