Cob-fid namespace iterator

Data Structures
struct	m0_cob_fid_ns_iter

Functions
M0_INTERNAL int	m0_cob_ns_iter_init (struct m0_cob_fid_ns_iter *iter, struct m0_fid *gfid, struct m0_cob_domain *cdom)
M0_INTERNAL int	m0_cob_ns_iter_next (struct m0_cob_fid_ns_iter *iter, struct m0_fid *gfid, struct m0_cob_nsrec **nsrec)
M0_INTERNAL int	m0_cob_ns_rec_of (struct m0_be_btree *cob_namespace, const struct m0_fid *key_gfid, struct m0_fid *next_gfid, struct m0_cob_nsrec **nsrec)
M0_INTERNAL void	m0_cob_ns_iter_fini (struct m0_cob_fid_ns_iter *iter)

Detailed Description

The cob on data server has cob nskey = <gob_fid, cob_index>, where, gob_fid : global file identifier corresponding to which the cob is being created. cob_index : unique index of the cob in the pool.

See also

m0_cob_nskey

The cob-fid iterator uniquely iterates over gob_fids, thus skipping entries with same gob_fids but different cob_index.

This iterator is used in SNS repair iterator.

See also

m0_sns_repair_iter

Function Documentation

m0_cob_ns_iter_fini()

M0_INTERNAL void m0_cob_ns_iter_fini

(

struct m0_cob_fid_ns_iter *

iter

)

Finalises the namespace iterator.

Parameters

iter	- Namespace iterator that is to be finalised.

Definition at line 123 of file ns_iter.c.

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m0_cob_ns_iter_init()

M0_INTERNAL int m0_cob_ns_iter_init	(	struct m0_cob_fid_ns_iter *	iter,
		struct m0_fid *	gfid,
		struct m0_cob_domain *	cdom
	)

Initialises the namespace iterator.

Parameters

iter	- Cob fid namespace iterator that is to be initialised.
gfid	- Initial gob-fid with which iterator is initialised.
dbenv	- DB environment from which the records should be extracted.
cdom	- Cob domain.

Definition at line 40 of file ns_iter.c.

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m0_cob_ns_iter_next()

M0_INTERNAL int m0_cob_ns_iter_next	(	struct m0_cob_fid_ns_iter *	iter,
		struct m0_fid *	gfid,
		struct m0_cob_nsrec **	nsrec
	)

Iterates over namespace to point to unique gob fid in the namespace.

Parameters

iter	- Pointer to the namespace iterator.
tx	- Database transaction used for DB operations by iterator.
gfid	- Next unique gob-fid in the iterator. This is output variable.

Definition at line 100 of file ns_iter.c.

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m0_cob_ns_rec_of()

M0_INTERNAL int m0_cob_ns_rec_of	(	struct m0_be_btree *	cob_namespace,
		const struct m0_fid *	key_gfid,
		struct m0_fid *	next_gfid,
		struct m0_cob_nsrec **	nsrec
	)

Definition at line 56 of file ns_iter.c.

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