dmu_object.c File Reference

#include <sys/dmu.h>
#include <sys/dmu_objset.h>
#include <sys/dmu_tx.h>
#include <sys/dnode.h>

Include dependency graph for dmu_object.c:

Go to the source code of this file.

Functions
uint64_t	dmu_object_alloc (objset_t *os, dmu_object_type_t ot, int blocksize, dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
	Chooses an unallocated object number and returns a new object that uses it in *objectp.
int	dmu_object_claim (objset_t *os, uint64_t object, dmu_object_type_t ot, int blocksize, dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
	Allocates an object for the specified object number.
int	dmu_object_reclaim (objset_t *os, uint64_t object, dmu_object_type_t ot, int blocksize, dmu_object_type_t bonustype, int bonuslen)
int	dmu_object_free (objset_t *os, uint64_t object, dmu_tx_t *tx)
	Free an object from this objset.
int	dmu_object_next (objset_t *os, uint64_t *objectp, boolean_t hole, uint64_t txg)
	Find the next allocated or free object.

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Function Documentation

uint64_t dmu_object_alloc	(	objset_t *	os,
		dmu_object_type_t	ot,
		int	blocksize,
		dmu_object_type_t	bonus_type,
		int	bonus_len,
		dmu_tx_t *	tx
	)

Chooses an unallocated object number and returns a new object that uses it in *objectp.

Allocate an object from this objset. The range of object numbers available is (0, DN_MAX_OBJECT). Object 0 is the meta-dnode.

The transaction must be assigned to a txg. The newly allocated object will be "held" in the transaction (ie. you can modify the newly allocated object in this transaction).

Returns:

0 on success or an errno on failure

Definition at line 31 of file dmu_object.c.

int dmu_object_claim	(	objset_t *	os,
		uint64_t	object,
		dmu_object_type_t	ot,
		int	blocksize,
		dmu_object_type_t	bonus_type,
		int	bonus_len,
		dmu_tx_t *	tx
	)

Allocates an object for the specified object number.

Return values:

0	Success
EEXIST	The object number is already allocated

Definition at line 86 of file dmu_object.c.

int dmu_object_free	(	objset_t *	os,
		uint64_t	object,
		dmu_tx_t *	tx
	)

Free an object from this objset.

The object's data will be freed as well (ie. you don't need to call dmu_free(object, 0, -1, tx)).

The object need not be held in the transaction.

Return values:

0	Success
EBUSY	There are holds on this object's buffers (via dmu_buf_hold()) or tx holds on the object (via dmu-tx_hold_object()) so it cannot be freed
ENOENT	The object is not allocated

Definition at line 164 of file dmu_object.c.

int dmu_object_next	(	objset_t *	os,
		uint64_t *	objectp,
		boolean_t	hole,
		uint64_t	txg
	)

Find the next allocated or free object.

Parameters:

[in,out]	objectp	Will be updated to the next object which is allocated
[in]	txg	ignore objects which have not been modified since txt

Invariant:

Can only be called on a objset with no dirty data.

Return values:

0	Success
ENOENT	There are no more objects

Definition at line 185 of file dmu_object.c.

int dmu_object_reclaim	(	objset_t *	os,
		uint64_t	object,
		dmu_object_type_t	ot,
		int	blocksize,
		dmu_object_type_t	bonustype,
		int	bonuslen
	)

Definition at line 106 of file dmu_object.c.