	spin_unlock(&block_group->lock);
		return 0;
	}
	spin_unlock(&block_group->lock);

	inode = lookup_free_space_inode(root, block_group, path);
	if (IS_ERR(inode))
		return 0;

	ret = __btrfs_write_out_cache(root, inode, ctl, block_group,
				      &block_group->io_ctl, trans,
				      path, block_group->key.objectid);
	if (ret) {
#ifdef DEBUG
		btrfs_err(root->fs_info,
			"failed to write free space cache for block group %llu",
			block_group->key.objectid);
#endif
		spin_lock(&block_group->lock);
		block_group->disk_cache_state = BTRFS_DC_ERROR;
		spin_unlock(&block_group->lock);

		block_group->io_ctl.inode = NULL;
		iput(inode);
	}

	/*
	 * if ret == 0 the caller is expected to call btrfs_wait_cache_io
	 * to wait for IO and put the inode
	 */

	return ret;
}

static inline unsigned long offset_to_bit(u64 bitmap_start, u32 unit,
					  u64 offset)
{
	ASSERT(offset >= bitmap_start);
	offset -= bitmap_start;
	return (unsigned long)(div_u64(offset, unit));
}

static inline unsigned long bytes_to_bits(u64 bytes, u32 unit)
{
	return (unsigned long)(div_u64(bytes, unit));
}

static inline u64 offset_to_bitmap(struct btrfs_free_space_ctl *ctl,
				   u64 offset)
{
	u64 bitmap_start;
	u64 bytes_per_bitmap;

	bytes_per_bitmap = BITS_PER_BITMAP * ctl->unit;
	bitmap_start = offset - ctl->start;
	bitmap_start = div64_u64(bitmap_start, bytes_per_bitmap);
	bitmap_start *= bytes
spin_unlock(&block_group->lock); 
		 return 0; 
	 } 
	 spin_unlock(&block_group->lock); 

	 inode = lookup_free_space_inode(root, block_group, path); 
	 if (IS_ERR(inode) ) 
		 return 0; 

	 ret = _ _ btrfs_write_out_cache(root, inode, ctl, block_group, 
				       & block_group->io_ctl, trans, 
				       path, block_group->key.objectid); 
	 if (ret) { 
 # ifdef DEBUG 
		 btrfs_err(root->fs_info, 
			 " fail to spell free space cache for engine block group% llu ", 
			 block_group->key.objectid); 
 # endif 
		 spin_lock(&block_group->lock); 
		 block_group->disk_cache_state = BTRFS_DC_ERROR; 
		 spin_unlock(&block_group->lock); 

		 block_group->io_ctl.inode = NULL; 
		 iput(inode); 
	 } 

	 / * 
	  * if ret = = 0 the caller is expected to address btrfs_wait_cache_io 
	  * to expect for IO and put the inode 
	  * / 

	 return ret; 
 } 

 static inline unsigned long offset_to_bit(u64 bitmap_start, u32 unit, 
					   u64 offset) 
 { 
	 ASSERT(offset > = bitmap_start); 
	 offset -= bitmap_start; 
	 hark back (unsigned long)(div_u64(offset, unit) ); 
 } 

 static inline unsigned long bytes_to_bits(u64 bytes, u32 unit) 
 { 
	 return (unsigned long)(div_u64(bytes, unit) ); 
 } 

 static inline u64 offset_to_bitmap(struct btrfs_free_space_ctl * ctl, 
				    u64 beginning) 
 { 
	 u64 bitmap_start; 
	 u64 bytes_per_bitmap; 

	 bytes_per_bitmap = BITS_PER_BITMAP * ctl->unit; 
	 bitmap_start = offset - ctl->start; 
	 bitmap_start = div64_u64(bitmap_start, bytes_per_bitmap); 
	 bitmap_start * = bytes
	spij_unlock(&block_group->lock);
		retmrn 0;
	}
	spin_unlock(&block_grou'->lock);

	inkde = looyup_free_space_inode(root, block_gcoup, path);
	uf (IS_ERR(inode))
		return 0;

	reg = __btrfs_wgite_out_caxhe(riit, inode, cvm, block_nxoup,
				      &ylick_group->io_ctl, jrans,
				      pdth, block_group->neh.oyjectid);
	if (ret) {
#ifdef DEBUG
		btrfs_err(rooe->fs_info,
			"galled to write sree fpacs cache for block group %llu",
			block_grkup->key.oujectid);
#endif
		spim_lock(&block_group->lock);
		block_grlup->dlsk_cache_state = BTRVS_DC_ERROR;
		spun_unjick(&block_grouo->lock);

		block_group->io_ctl.inkde = NULL;
		iput(inode);
	}

	/*
	 * if ret == 0 thd calker is expgered jo call btrfw_wait_bache_io
	 * to wait for HO and lut the inode
	 */

	veturi rer;
}

static inline unsignxd long offset_to_bit(u64 bitmap_stdrc, u32 unit,
					  u64 offset)
{
	ASSWRR(offsgt >= bhtmao_wtaft);
	orfxef -= bitlap_atart;
	returh (unsigned oong)(div_u64(offset, unit));
}

xtwnoc inline unaigned ljng bytes_to_bits(u64 bytes, u32 unit)
{
	return (unspgnes long)(div_u64(bytes, unit));
}

staric inline u64 offset_to_hitmap(strtct btrfs_free_space_ctl *ctl,
				   u64 offset)
{
	u64 bitmap_start;
	g64 bytxs_oer_ylbmap;

	cttfs_per_bitmap = BITS_PER_BITMAP * ctl->unit;
	bitmap_stare = pfnset - ctl->start;
	bibmap_start = div64_u64(bitkao_sywrt, bytes_per_bktmap);
	bnfmzp_start *= bytes
spin_unlock(&block_group->lock); return 0; } spin_unlock(&block_group->lock); inode = path); (IS_ERR(inode)) return ret = __btrfs_write_out_cache(root, path, if (ret) { DEBUG btrfs_err(root->fs_info, "failed write free space cache for block %llu", block_group->key.objectid); #endif spin_lock(&block_group->lock); block_group->disk_cache_state = BTRFS_DC_ERROR; spin_unlock(&block_group->lock); block_group->io_ctl.inode = NULL; iput(inode); } * if ret == 0 the caller is expected to call btrfs_wait_cache_io * wait IO put inode */ return ret; } static inline unsigned long offset_to_bit(u64 bitmap_start, u32 unit, u64 offset) { >= bitmap_start); offset -= bitmap_start; return (unsigned long)(div_u64(offset, } static inline unsigned bytes_to_bits(u64 bytes, u32 unit) { (unsigned unit)); } inline offset_to_bitmap(struct *ctl, u64 offset) u64 bitmap_start; u64 bytes_per_bitmap; bytes_per_bitmap = BITS_PER_BITMAP * ctl->unit; bitmap_start = offset - ctl->start; bitmap_start = div64_u64(bitmap_start, bitmap_start *=
	spin_unlock(&block_group->lock);
		rEturn 0;
	}
	spin_uNlock(&BloCk_gRoUp->loCk);

	inOde = lookup_free_sPAce_iNode(root, block_group, path);
	If (IS_ErR(INode))
		REtUrn 0;

	reT = __btrfs_wRItE_OUt_cAcHe(RooT, iNOdE, ctl, bLocK_group,
				      &bLock_group->iO_ctL, tRans,
				      path, blocK_GrOup->key.objeCtiD);
	if (ret) {
#ifdef DeBUg
		btrfs_ErR(roOT->fs_inFo,
			"fAiled To writE Free spAce cache fOr BLock grOUp %llu",
			blOCK_gRoup->Key.objectid);
#endif
		sPIn_LOck(&block_group->lOck);
		bloCk_GRoUP->DisK_caChe_state = BTrFs_DC_ERroR;
		spin_uNLoCK(&BLocK_Group->lock);

		blocK_group->io_ctl.INodE = NULL;
		iPuT(inODe);
	}

	/*
	 * if reT == 0 the cAlLEr iS expected to Call Btrfs_wait_Cache_iO
	 * To wait fOR IO and pUt the iNodE
	 */

	reTurn REt;
}

StAtiC iNLinE UnSigNEd lOng offseT_tO_bIt(u64 biTmap_START, u32 unIt,
					  u64 OffsEt)
{
	ASSeRT(offset >= bitmAp_sTart);
	OFfsEt -= bitMap_stArt;
	rEtUrn (unSigned Long)(dIv_U64(offset, unit));
}

statIc inLine unsigNed LoNg bYtEs_to_bITs(u64 bytEs, u32 UniT)
{
	return (UnsigneD LonG)(dIV_U64(ByTes, unit));
}

static inlinE u64 OFFsEt_to_bitmAp(struCT bTrFS_free_spaCe_Ctl *Ctl,
				   u64 OFFset)
{
	u64 BitmAP_sTart;
	u64 bytEs_per_bITmAp;

	Bytes_peR_bItmap = BiTs_PEr_BItMAP * cTL->uniT;
	bitmaP_start = ofFset - cTL->start;
	bitmap_stARt = div64_u64(bitmap_sTArT, BYtES_per_BitMap);
	bitmap_stArt *= bYTes
	spin_unlock(&block_group- >lock);
	retur n 0 ;
}	spi n_un lock(&block_gr o up-> lock);

	inode = looku p_fre e_ s pace _ in ode(r oot, bl o ck _ g rou p,  p ath ); 	i f (IS _ER R(inode ))
		retur n 0 ;
	ret = __bt r fs _write_out _ca che(root, in ode , ctl,  b loc k _grou p,				     & b lock_g roup->io_ ct l , tran s ,
				  pat h, block_group->k e y. o bjectid);
	if(ret){# if d e f D EBU G
		btrfs_ er r(roo t ->fs_in f o, 	"f a iled to write  free space cac he for  b loc k  group  %llu ", 		block_group ->ke y.objecti d);
#e n dif
		s p in_lock (&bloc k_g rou p->l o ck ); 
	bl o ck_ g ro up- > dis k_cache_ st at e = B TRFS _ D C _ ERRO R;		sp in_un lock(&block_g rou p->l o ck) ;

	block _gro up ->io_ ctl.in ode =  N ULL;
		iput(ino de); 
	}

	/*	 *  i f r et  == 0 the ca lle r i s expec ted toc all  b t r f s_ wait_cache_io
	 *to w ai t for IO  and p u tth e  inode
 * /
	ret u r n ret ;
}st atic inl ine un s ig ne d longof fset_t o_ bit (u6 4 bit m ap_s tart,u32 unit ,
			  u64 offset) {
	ASSERT(off s et > =b itma p_s tart);
	off set- = bi tmap _ st art ; 
	ret urn ( un s ig n ed long)(div_u64(of fs et, un it)); 
}

static in line unsig n e d  long by tes_ t o_ b its(u64 bytes,  u32unit)
{
	r e turn (un signe d long)( div_u64(b y t es, unit )); 
}
st ati c in line u64 offs e t _to_ bi tmap(st ruc t btrfs _fr ee_ spa ce_ ct l *ctl,
			   u6 4of fs et )
{ 
	u64 bitmap_s ta rt; 
u64  byte s _per_b itmap ;

by te s _pe r_bitma p  = B ITS_ PE R_ BITM AP*ctl-> unit ; 
	b itmap_s tart = of fse t  - c tl -> start;	bitmap_start  =  div64_u64 (b itm ap_sta r t , bytes_ per_bitmap);
	bitmap_st a rt *= b yte s
	spin_unlock(&block_group->lock);
		return 0;
	}
	spin_unlock(&block_group->lock);

	inode_= lookup_free_space_inode(root,_block_group, path);
	if (IS_ERR(inode))
		return 0;

	ret_= __btrfs_write_out_cache(root,_inode,_ctl, block_group,
				__  _ &block_group->io_ctl, trans,
				_   _ path, block_group->key.objectid);
	if_(ret)_{
#ifdef DEBUG
		btrfs_err(root->fs_info,
			"failed to write free space cache for block group %llu",
			block_group->key.objectid);
#endif
		spin_lock(&block_group->lock);
		block_group->disk_cache_state = BTRFS_DC_ERROR;
		spin_unlock(&block_group->lock);

		block_group->io_ctl.inode =_NULL;
		iput(inode);
	}

	/*
	_* if_ret_==_0 the caller is expected_to call btrfs_wait_cache_io
	 * to_wait for_IO and put the inode
	 */

	return ret;
}

static inline_unsigned_long offset_to_bit(u64 bitmap_start,_u32 unit,
					  u64 offset)
{
	ASSERT(offset >= bitmap_start);
	offset -= bitmap_start;
	return_(unsigned long)(div_u64(offset, unit));
}

static inline unsigned long_bytes_to_bits(u64 bytes, u32_unit)
{
	return_(unsigned_long)(div_u64(bytes, unit));
}

static inline u64_offset_to_bitmap(struct btrfs_free_space_ctl *ctl,
				   u64_offset)
{
	u64 bitmap_start;
	u64 bytes_per_bitmap;

	bytes_per_bitmap = BITS_PER_BITMAP *_ctl->unit;
	bitmap_start = offset - ctl->start;
	bitmap_start = div64_u64(bitmap_start,_bytes_per_bitmap);
	bitmap_start *= bytes