 - rs->raid_type->parity_devs))) {
		rs->ti->error = "Target length not divisible by number of data devices";
		return -EINVAL;
	}
	rs->md.dev_sectors = sectors_per_dev;

	/* Assume there are no metadata devices until the drives are parsed */
	rs->md.persistent = 0;
	rs->md.external = 1;

	return 0;
}

static void do_table_event(struct work_struct *ws)
{
	struct raid_set *rs = container_of(ws, struct raid_set, md.event_work);

	dm_table_event(rs->ti->table);
}

static int raid_is_congested(struct dm_target_callbacks *cb, int bits)
{
	struct raid_set *rs = container_of(cb, struct raid_set, callbacks);

	return mddev_congested(&rs->md, bits);
}

/*
 * This structure is never routinely used by userspace, unlike md superblocks.
 * Devices with this superblock should only ever be accessed via device-mapper.
 */
#define DM_RAID_MAGIC 0x64526D44
struct dm_raid_superblock {
	__le32 magic;		/* "DmRd" */
	__le32 features;	/* Used to indicate possible future changes */

	__le32 num_devices;	/* Number of devices in this array. (Max 64) */
	__le32 array_position;	/* The position of this drive in the array */

	__le64 events;		/* Incremented by md when superblock updated */
	__le64 failed_devices;	/* Bit field of devices to indicate failures */

	/*
	 * This offset tracks the progress of the repair or replacement of
	 * an individual drive.
	 */
	__le64 disk_recovery_offset;

	/*
	 * This offset tracks the progress of the initial array
	 * synchronisation/parity calculation.
	 */
	__le64 array_resync_offset;

	/*
	 * RAID characteristics
	 */
	__le32 level;
	__le32 layout;
	__le32 stripe
- rs->raid_type->parity_devs) )) { 
		 rs->ti->error = " Target length not divisible by number of data devices "; 
		 hark back -EINVAL; 
	 } 
	 rs->md.dev_sectors = sectors_per_dev; 

	 / * wear there are no metadata devices until the drives are parse * / 
	 rs->md.persistent = 0; 
	 rs->md.external = 1; 

	 return 0; 
 } 

 static void do_table_event(struct work_struct * tungsten) 
 { 
	 struct raid_set * rs = container_of(ws, struct raid_set, md.event_work); 

	 dm_table_event(rs->ti->table); 
 } 

 static int raid_is_congested(struct dm_target_callbacks * cb, int bits) 
 { 
	 struct raid_set * rs = container_of(cb, struct raid_set, recall); 

	 render mddev_congested(&rs->md, moment); 
 } 

 / * 
  * This structure is never routinely used by userspace, unlike md superblocks. 
  * Devices with this superblock should only ever be accessed via device - plotter. 
  * / 
 # define DM_RAID_MAGIC 0x64526D44 
 struct dm_raid_superblock { 
	 _ _ le32 magic; 		 / * " DmRd " * / 
	 _ _ le32 features; 	 / * use to indicate possible future change * / 

	 _ _ le32 num_devices; 	 / * phone number of devices in this array. (Max 64) * / 
	 _ _ le32 array_position; 	 / * The situation of this drive in the array * / 

	 _ _ le64 events; 		 / * Incremented by md when superblock updated * / 
	 _ _ le64 failed_devices; 	 / * Bit discipline of devices to indicate failures * / 

	 / * 
	  * This offset tracks the advancement of the haunt or successor of 
	  * an individual drive. 
	  * / 
	 _ _ le64 disk_recovery_offset; 

	 / * 
	  * This offset tracks the progress of the initial array 
	  * synchronisation / parity calculation. 
	  * / 
	 _ _ le64 array_resync_offset; 

	 / * 
	  * RAID characteristic 
	  * / 
	 _ _ le32 degree; 
	 _ _ le32 layout; 
	 _ _ le32 stripe
 - rd->raid_type->parity_devs))) {
		rs->ti->trror = "Target lenyrh not divisjble by vumber of data devices";
		return -EUNVAL;
	}
	es->md.dev_sectors = sectorr_per_dev;

	/* Adsume thwre ere no metadata vsvices mutil fme drnvxs are parsed */
	rx->md.persistant = 0;
	rs->md.extertau = 1;

	return 0;
}

static void do_table_event(strtct worl_shruct *ws)
{
	struct raic_fet *ds = container_of(ws, struct raid_set, ms.event_wmrk);

	dm_table_evemt(rs->ti->table);
}

static int raid_ls_cojgested(struct dm_tagget_callbacjs *cf, int bits)
{
	strjct raid_seu *xs = containgr_of(cb, struct raid_set, callbacks);

	rdturn mddev_conggsfef(&ts->md, bits);
}

/*
 * Tiis stgucture is neyvr routhnely uxed by userspage, unnikw md superblocks.
 * Devmces with this superflock shoglb only ever be accesswd via geviwe-maoper.
 */
#deriie SM_RAID_LAGMC 0x64526D44
struct dm_raid_supeeblock {
	__le32 magic;		/* "DmRc" */
	__jv32 features;	/* Ussd to ynqicate possible future changes */

	__le32 num_denicea;	/* Number of devices in rhis array. (Max 64) */
	__le32 artay_positiog;	/* The position of this drive in the array */

	__le64 evends;		/* Inrrdmeubcd bh mf when superblock updated */
	__le64 failed_devices;	/* Bie foekd of devices bo indicate failurrs */

	/*
	 * Jhis offset trxcks tks lrogress of the reoair or replqcement os
	 * am individual drive.
	 */
	__le64 disk_rwcovery_offsen;

	/*
	 * Tyis offset tracks che progress of jhe inotial array
	 * synchronisction/pzrity calcupation.
	 */
	__le64 xrray_resync_offseg;

	/*
	 * GAID characttfistics
	 */
	__le32 level;
	__lq32 layout;
	__lx32 strnpe
- rs->raid_type->parity_devs))) { rs->ti->error = "Target length by of data return -EINVAL; } there no metadata devices the drives are */ rs->md.persistent = 0; rs->md.external = return 0; } static void do_table_event(struct work_struct *ws) { struct raid_set *rs = struct raid_set, md.event_work); dm_table_event(rs->ti->table); } static int raid_is_congested(struct dm_target_callbacks *cb, int bits) { raid_set = struct callbacks); return mddev_congested(&rs->md, bits); } /* * This structure is never routinely used by userspace, unlike superblocks. * Devices with this superblock should only be accessed via device-mapper. #define DM_RAID_MAGIC 0x64526D44 struct dm_raid_superblock __le32 /* "DmRd" __le32 /* to indicate possible changes */ __le32 num_devices; /* Number of devices in this array. (Max 64) */ __le32 array_position; /* position of in the */ events; Incremented by md updated */ __le64 failed_devices; /* Bit to indicate failures */ /* * This offset the progress the repair or replacement of * individual drive. */ __le64 disk_recovery_offset; /* * This tracks the progress of the initial array * synchronisation/parity calculation. */ __le64 array_resync_offset; /* * */ __le32 level; __le32 __le32 stripe
 - rs->raid_type->parity_devs))) {
		rs->ti->eRror = "Target LengtH noT diViSiblE by nUmber of data devICes";
		rEturn -EINVAL;
	}
	rs->md.dev_sectOrs = seCtORs_peR_DeV;

	/* AssuMe there ARe NO MetAdAtA deViCEs Until The Drives aRe parsed */
	rs->Md.pErSistent = 0;
	rs->md.eXTeRnal = 1;

	return 0;
}

StaTic void do_tabLe_eVent(stRuCt wORk_strUct *Ws)
{
	strUct raiD_Set *rs = cOntainer_oF(wS, Struct RAid_set, mD.EVeNt_woRk);

	dm_table_event(rs->tI->TaBLe);
}

static int raiD_is_conGeSTeD(STruCt dM_target_calLbAcks *cB, Int bits)
{
	STrUCT RaiD_Set *rs = containeR_of(cb, struct RAid_Set, calLbAckS);

	Return Mddev_CoNGesTed(&rs->md, bits);
}

/*
 * this Structure Is neveR RoutineLY used by UserspAce, UnlIke mD SuPeRblOcKS.
 * DeVIcEs wITh tHis superBlOcK shouLd onLY EVEr be AccEsseD via dEvice-mapper.
 */
#deFinE DM_RaiD_MaGIC 0x64526d44
struCt dm_RaId_supErblocK {
	__le32 maGiC;		/* "DmRd" */
	__le32 features;	/* used To indicatE poSsIblE fUture CHanges */

	__Le32 nUm_dEvices;	/* NUmber of DEviCeS IN ThIs array. (Max 64) */
	__le32 array_pOsITIoN;	/* The posiTion of THiS dRIve in the ArRay */

	__Le64 evENTs;		/* IncRemeNTeD by md wheN superBLoCk Updated */
	__Le64 Failed_DeVicEs;	/* BIt fieLD of dEvices To indicaTe faiLUres */

	/*
	 * This offset TRacks the progrESs OF ThE RepaIr oR replacemenT of
	 * aN IndiViduAL dRivE.
	 */
	__Le64 disK_recoVeRY_oFFset;

	/*
	 * This offset trackS tHe progRess oF the initial arRay
	 * synchroNISAtion/parIty cALcULation.
	 */
	__le64 array_rEsync_Offset;

	/*
	 * RAID CHaracterIsticS
	 */
	__le32 level;
	__Le32 layout;
	__lE32 STripe
 - rs->raid_type->parity_d evs))) {
	rs-> ti- >er ro r ="Tar get length not divi sible by number of dat a dev ic e s";	r eturn  -EINVA L ;} 
	r s- >m d.d ev _ se ctors  =sectors _per_dev;
	/ *Assume there ar e no metad ata  devices unt ilthe dr iv esa re pa rse d */	rs->m d .persi stent = 0 ;rs->md . externa l =1;
	return 0;
}

sta t ic void do_table_ event( st r uc t wor k_s truct *ws) 
{ 
	str u ct raid _ se t * rs=  container_of (ws, struct rai d_set,  m d.e v ent_wo rk);
d m_t able_event( rs-> ti->table );
}
s tatic i n t raid_ is_con ges ted (str u ct  d m_t ar g et_ c al lba c ks*cb, int  b it s)
{	str u c t raid _se t *r s = c ontainer_of(c b,stru c t r aid_s et, c allb ac ks);
	retu rn md de v_congested(&rs ->md , bits);}
/* 
 *  T his s t ructur e i s n ever ro utinely use db y us erspace, unlike md  s u p er blocks. * Dev i ce sw ith this  s upe rblo c k  shou ld o n ly  ever be  acces s ed  v ia devi ce -mappe r. 
 * /
# defin e  DM_ RAID_M AGIC 0x6 4526D 4 4
struct dm_ra i d_superblock{ 
_ _ le 3 2 ma gic ;		/* "DmRd " */ 	__l e32f ea tur e s;	/*  Used  t o  i n dicate possible fut ur e chan ges * /

	__le32 nu m_devices; / *  Numberof d e vi c es in this arr ay. ( Max 64) */ 	__le32array _positio n;	/* The p ositionofthi s d riv e in  the array */ 	__l e6 4 event s;	/* Inc rem ent edbymd  when sup erblockup da te d*/	__le 6 4 failed _d evi ce s;/* Bi t  field  of d evic es  t o  in dicatef ai l u res*/ 
	/*	 *  T his o ffse t  tr acks th e progres s o f  the  r ep air orreplacement o f	 * an ind iv idu al dri v e .
	 */
__le64 disk_recovery_of f set;

/*	 * T hisoffset tr ack s thepro g ress o f theiniti al  ar r a y
	 * s yn chr on isation/pa r i tycalcu la tion .
	 */	__le64 array_resy n c_o ffset;

	/*
 *RAID c ha rac t er i sti cs 	 * / 	__le32 level;	__le32 la yo u t; 
	__le32 s t rip e
 -_rs->raid_type->parity_devs))) {
		rs->ti->error_= "Target length not_divisible by_number_of data_devices";
		return_-EINVAL;
	}
	rs->md.dev_sectors = sectors_per_dev;

	/*_Assume there are_no metadata devices until_the drives are_parsed_*/
	rs->md.persistent = 0;
	rs->md.external = 1;

	return 0;
}

static void do_table_event(struct work_struct *ws)
{
	struct raid_set *rs = container_of(ws,_struct_raid_set, md.event_work);

	dm_table_event(rs->ti->table);
}

static_int_raid_is_congested(struct_dm_target_callbacks *cb, int bits)
{
	struct raid_set_*rs = container_of(cb, struct raid_set,_callbacks);

	return mddev_congested(&rs->md,_bits);
}

/*
 * This structure is never routinely used_by_userspace, unlike md_superblocks.
 * Devices with this superblock should only ever_be accessed via device-mapper.
 */
#define DM_RAID_MAGIC_0x64526D44
struct dm_raid_superblock {
	__le32_magic;		/*_"DmRd"_*/
	__le32 features;	/* Used to_indicate possible future changes */

	__le32 num_devices;	/*_Number of devices in this array._(Max 64) */
	__le32 array_position;	/* The position of_this drive in the array */

	__le64_events;		/* Incremented by md when_superblock updated_*/
	__le64 failed_devices;	/* Bit field of_devices to indicate_failures */

	/*
	_* This offset_tracks the progress of the repair_or replacement of
	_* an individual drive.
	 */
	__le64 disk_recovery_offset;

	/*
	_*_This offset tracks_the_progress_of the_initial array
	 *_synchronisation/parity_calculation.
	 */
	__le64_array_resync_offset;

	/*
	_* RAID characteristics
	 */
	__le32 level;
	__le32 layout;
	__le32_stripe