parity_repair.c File Reference

#include "lib/trace.h"
#include "lib/misc.h"
#include "lib/errno.h"
#include "sns/parity_repair.h"
#include "ioservice/fid_convert.h"

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Macros
#define	M0_TRACE_SUBSYSTEM   M0_TRACE_SUBSYS_SNSCM

Functions
static void	device_index_get (struct m0_pdclust_instance *pi, uint64_t group_number, uint64_t unit_number, uint32_t *device_index_out)
static int	_spare_next (struct m0_poolmach *pm, const struct m0_fid *fid, struct m0_pdclust_layout *pl, struct m0_pdclust_instance *pi, uint64_t group_number, uint64_t unit_number, uint32_t *spare_slot_out, uint32_t *spare_slot_out_prev, bool break_next)
M0_INTERNAL int	m0_sns_repair_spare_map (struct m0_poolmach *pm, const struct m0_fid *fid, struct m0_pdclust_layout *pl, struct m0_pdclust_instance *pi, uint64_t group, uint64_t unit, uint32_t *spare_slot_out, uint32_t *spare_slot_out_prev)
M0_INTERNAL int	m0_sns_repair_spare_rebalancing (struct m0_poolmach *pm, const struct m0_fid *fid, struct m0_pdclust_layout *pl, struct m0_pdclust_instance *pi, uint64_t group, uint64_t unit, uint32_t *spare_slot_out, uint32_t *spare_slot_out_prev)
static bool	frame_eq (struct m0_pdclust_instance *pi, uint64_t group_number, uint64_t frame, uint32_t device_index)
static uint64_t	frame_get (struct m0_pdclust_instance *pi, uint64_t spare_frame, uint64_t group_number, uint32_t device_index)
M0_INTERNAL int	m0_sns_repair_data_map (struct m0_poolmach *pm, struct m0_pdclust_layout *pl, struct m0_pdclust_instance *pi, uint64_t group_number, uint64_t spare_unit_number, uint64_t *data_unit_id_out)

Macro Definition Documentation

M0_TRACE_SUBSYSTEM

#define M0_TRACE_SUBSYSTEM   M0_TRACE_SUBSYS_SNSCM

Definition at line 22 of file parity_repair.c.

Function Documentation

_spare_next()

static int _spare_next ( struct m0_poolmach *  pm, const struct m0_fid *  fid, struct m0_pdclust_layout *  pl, struct m0_pdclust_instance *  pi, uint64_t  group_number, uint64_t  unit_number, uint32_t *  spare_slot_out, uint32_t *  spare_slot_out_prev, bool  break_next  )

static

Definition at line 47 of file parity_repair.c.

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device_index_get()

static void device_index_get ( struct m0_pdclust_instance *  pi, uint64_t  group_number, uint64_t  unit_number, uint32_t *  device_index_out  )

static

Definition at line 29 of file parity_repair.c.

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frame_eq()

static bool frame_eq ( struct m0_pdclust_instance *  pi, uint64_t  group_number, uint64_t  frame, uint32_t  device_index  )

static

Definition at line 140 of file parity_repair.c.

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frame_get()

static uint64_t frame_get ( struct m0_pdclust_instance *  pi, uint64_t  spare_frame, uint64_t  group_number, uint32_t  device_index  )

static

Definition at line 158 of file parity_repair.c.

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m0_sns_repair_data_map()

M0_INTERNAL int m0_sns_repair_data_map	(	struct m0_poolmach *	pm,
		struct m0_pdclust_layout *	pl,
		struct m0_pdclust_instance *	pi,
		uint64_t	group_number,
		uint64_t	spare_unit_number,
		uint64_t *	data_unit_id_out
	)

Map the {spare slot, data/parity unit id} pair after repair.

Parameters

pm	pool machine.
fid	Global file id.
pl	pdclust layout instance.
group_number	Parity group number for a given file.
unit_number	Spare unit number in the parity group.
data_unit_id_out	the output data unit index.

Definition at line 192 of file parity_repair.c.

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m0_sns_repair_spare_map()

M0_INTERNAL int m0_sns_repair_spare_map	(	struct m0_poolmach *	pm,
		const struct m0_fid *	fid,
		struct m0_pdclust_layout *	pl,
		struct m0_pdclust_instance *	pi,
		uint64_t	group_number,
		uint64_t	unit_number,
		uint32_t *	spare_slot_out,
		uint32_t *	spare_slot_out_prev
	)

Map the {failed device, spare slot} pair of a specified device.

Parameters

pm	pool machine.
fid	Global file id.
pl	pdclust layout instance.
group_number	Parity group number for a given file.
unit_number	Unit number in the parity group.
spare_slot_out	the output spare slot.
spare_slot_out_prev	the previous spare slot (in case of cascaded failures) Contains unit number in case of single failure.

Definition at line 103 of file parity_repair.c.

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m0_sns_repair_spare_rebalancing()

M0_INTERNAL int m0_sns_repair_spare_rebalancing	(	struct m0_poolmach *	pm,
		const struct m0_fid *	fid,
		struct m0_pdclust_layout *	pl,
		struct m0_pdclust_instance *	pi,
		uint64_t	group,
		uint64_t	unit,
		uint32_t *	spare_slot_out,
		uint32_t *	spare_slot_out_prev
	)

Definition at line 115 of file parity_repair.c.

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