Linear Enumeration Type.

Data Structures
struct	m0_layout_linear_attr
struct	m0_layout_linear_enum

Macros
#define	M0_TRACE_SUBSYSTEM   M0_TRACE_SUBSYS_LAYOUT

Functions
	M0_BOB_DEFINE (static, &linear_bob, m0_layout_linear_enum)
static bool	linear_allocated_invariant (const struct m0_layout_linear_enum *le)
static bool	linear_invariant (const struct m0_layout_linear_enum *le)
static int	linear_allocate (struct m0_layout_domain *dom, struct m0_layout_enum **out)
static void	linear_delete (struct m0_layout_enum *e)
static int	linear_populate (struct m0_layout_linear_enum *lin_enum, const struct m0_layout_linear_attr *attr)
M0_INTERNAL int	m0_linear_enum_build (struct m0_layout_domain *dom, const struct m0_layout_linear_attr *attr, struct m0_layout_linear_enum **out)
static struct m0_layout_linear_enum *	enum_to_linear_enum (const struct m0_layout_enum *e)
static void	linear_fini (struct m0_layout_enum *e)
static int	linear_register (struct m0_layout_domain *dom, const struct m0_layout_enum_type *et)
static void	linear_unregister (struct m0_layout_domain *dom, const struct m0_layout_enum_type *et)
static m0_bcount_t	linear_max_recsize (void)
static int	linear_decode (struct m0_layout_enum *e, struct m0_bufvec_cursor *cur, enum m0_layout_xcode_op op, struct m0_be_tx *tx, struct m0_striped_layout *stl)
static int	linear_encode (const struct m0_layout_enum *e, enum m0_layout_xcode_op op, struct m0_be_tx *tx, struct m0_bufvec_cursor *out)
static uint32_t	linear_nr (const struct m0_layout_enum *e)
static void	linear_get (const struct m0_layout_enum *e, uint32_t idx, const struct m0_fid *gfid, struct m0_fid *out)
static m0_bcount_t	linear_recsize (struct m0_layout_enum *e)
	M0_BASSERT (M0_IS_8ALIGNED(sizeof(struct m0_layout_linear_attr)))

Variables
static const struct m0_bob_type	linear_bob
static const struct m0_layout_enum_ops	linear_enum_ops
static const struct m0_layout_enum_type_ops	linear_type_ops
struct m0_layout_enum_type	m0_linear_enum_type
struct m0_layout_enum_type	m0_linear_enum_type

Detailed Description

A layout with linear enumeration type stores a linear formula that is used to enumerate all the component object identifiers.

Macro Definition Documentation

M0_TRACE_SUBSYSTEM

#define M0_TRACE_SUBSYSTEM   M0_TRACE_SUBSYS_LAYOUT

Definition at line 37 of file linear_enum.c.

Function Documentation

enum_to_linear_enum()

static struct m0_layout_linear_enum* enum_to_linear_enum ( const struct m0_layout_enum *  e )

static

Definition at line 167 of file linear_enum.c.

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linear_allocate()

static int linear_allocate ( struct m0_layout_domain *  dom, struct m0_layout_enum **  out  )

static

Implementation of leto_allocate for LINEAR enumeration type.

Definition at line 79 of file linear_enum.c.

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linear_allocated_invariant()

static bool linear_allocated_invariant ( const struct m0_layout_linear_enum *  le )

static

Definition at line 55 of file linear_enum.c.

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linear_decode()

static int linear_decode ( struct m0_layout_enum *  e, struct m0_bufvec_cursor *  cur, enum m0_layout_xcode_op  op, struct m0_be_tx *  tx, struct m0_striped_layout *  stl  )

static

Implementation of leo_decode() for linear enumeration type.

Definition at line 217 of file linear_enum.c.

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linear_delete()

static void linear_delete ( struct m0_layout_enum *  e )

static

Definition at line 106 of file linear_enum.c.

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linear_encode()

static int linear_encode ( const struct m0_layout_enum *  e, enum m0_layout_xcode_op  op, struct m0_be_tx *  tx, struct m0_bufvec_cursor *  out  )

static

Implementation of leo_encode() for linear enumeration type.

Definition at line 255 of file linear_enum.c.

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linear_fini()

static void linear_fini ( struct m0_layout_enum *  e )

static

Implementation of leo_fini for LINEAR enumeration type.

Definition at line 178 of file linear_enum.c.

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linear_get()

static void linear_get ( const struct m0_layout_enum *  e, uint32_t  idx, const struct m0_fid *  gfid, struct m0_fid *  out  )

static

Implementation of leo_get for LINEAR enumeration.

Definition at line 298 of file linear_enum.c.

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linear_invariant()

static bool linear_invariant ( const struct m0_layout_linear_enum *  le )

static

linear_invariant() can not be invoked until an enumeration object is associated with some layout object. Hence this separation.

Definition at line 67 of file linear_enum.c.

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linear_max_recsize()

static m0_bcount_t linear_max_recsize ( void  )

static

Implementation of leto_max_recsize() for linear enumeration type.

Definition at line 211 of file linear_enum.c.

linear_nr()

static uint32_t linear_nr ( const struct m0_layout_enum *  e )

static

Implementation of leo_nr for LINEAR enumeration.

Definition at line 282 of file linear_enum.c.

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linear_populate()

static int linear_populate ( struct m0_layout_linear_enum *  lin_enum, const struct m0_layout_linear_attr *  attr  )

static

Definition at line 121 of file linear_enum.c.

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linear_recsize()

static m0_bcount_t linear_recsize ( struct m0_layout_enum *  e )

static

Implementation of leo_recsize() for linear enumeration type.

Definition at line 320 of file linear_enum.c.

linear_register()

static int linear_register ( struct m0_layout_domain *  dom, const struct m0_layout_enum_type *  et  )

static

Implementation of leto_register for LINEAR enumeration type. No table is required specifically for LINEAR enum type.

Definition at line 198 of file linear_enum.c.

linear_unregister()

static void linear_unregister ( struct m0_layout_domain *  dom, const struct m0_layout_enum_type *  et  )

static

Implementation of leto_unregister for LINEAR enumeration type.

Definition at line 205 of file linear_enum.c.

M0_BASSERT()

M0_BASSERT

(

M0_IS_8ALIGNED(sizeof(struct m0_layout_linear_attr))

)

M0_BOB_DEFINE()

M0_BOB_DEFINE	(	static	,
		&	linear_bob,
		m0_layout_linear_enum
	)

m0_linear_enum_build()

M0_INTERNAL int m0_linear_enum_build	(	struct m0_layout_domain *	dom,
		const struct m0_layout_linear_attr *	attr,
		struct m0_layout_linear_enum **	out
	)

Allocates and builds linear enumeration object.

Postcondition

ergo(rc == 0, linear_invariant_internal(lin_enum))

Note

Enum object is not to be finalised explicitly by the user. It is finalised internally through m0_layout__striped_fini().

Definition at line 138 of file linear_enum.c.

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Variable Documentation

linear_bob

const struct m0_bob_type linear_bob

static

Initial value:

= {
        .bt_name         = "linear_enum",
        .bt_magix_offset = offsetof(struct m0_layout_linear_enum, lla_magic),
        .bt_magix        = M0_LAYOUT_LINEAR_ENUM_MAGIC,
        .bt_check        = NULL
}

Definition at line 46 of file linear_enum.c.

linear_enum_ops

static const struct m0_layout_enum_ops linear_enum_ops

static

Initial value:

= {
        .leo_nr      = linear_nr,
        .leo_get     = linear_get,
        .leo_recsize = linear_recsize,
        .leo_fini    = linear_fini,
        .leo_delete  = linear_delete,
        .leo_decode  = linear_decode,
        .leo_encode  = linear_encode
}

Definition at line 76 of file linear_enum.c.

linear_type_ops

const struct m0_layout_enum_type_ops linear_type_ops

static

Initial value:

= {
        .leto_register    = linear_register,
        .leto_unregister  = linear_unregister,
        .leto_max_recsize = linear_max_recsize,
        .leto_allocate    = linear_allocate
}

Definition at line 335 of file linear_enum.c.

m0_linear_enum_type [1/2]

struct m0_layout_enum_type m0_linear_enum_type

Definition at line 342 of file linear_enum.c.

m0_linear_enum_type [2/2]

struct m0_layout_enum_type m0_linear_enum_type

Initial value:

= {
        .let_name      = "linear",
        .let_id        = 1,
        .let_ref_count = 0,
        .let_ops       = &linear_type_ops
}

Definition at line 342 of file linear_enum.c.