Data Structures
struct	m0_balloc_group_desc

struct	m0_balloc_zone_param

struct	m0_lext

struct	m0_balloc_group_info

struct	m0_balloc_super_block

struct	m0_balloc

struct	m0_balloc_format_req

struct	m0_balloc_free_extent

struct	m0_balloc_allocate_req

struct	m0_balloc_free_req

struct	m0_balloc_discard_req

Enumerations
enum	m0_balloc_group_desc_format_version { M0_BALLOC_GROUP_DESC_FORMAT_VERSION_1 = 1, M0_BALLOC_GROUP_DESC_FORMAT_VERSION = M0_BALLOC_GROUP_DESC_FORMAT_VERSION_1 }

enum	m0_balloc_allocation_flag { M0_BALLOC_HINT_MERGE = 1 << 0, M0_BALLOC_HINT_RESERVED = 1 << 1, M0_BALLOC_HINT_METADATA = 1 << 2, M0_BALLOC_HINT_FIRST = 1 << 3, M0_BALLOC_HINT_BEST = 1 << 4, M0_BALLOC_HINT_DATA = 1 << 5, M0_BALLOC_HINT_NOPREALLOC = 1 << 6, M0_BALLOC_HINT_GROUP_ALLOC = 1 << 7, M0_BALLOC_HINT_GOAL_ONLY = 1 << 8, M0_BALLOC_HINT_TRY_GOAL = 1 << 9, M0_BALLOC_DELALLOC_RESERVED = 1 << 10, M0_BALLOC_STREAM_ALLOC = 1 << 11, M0_BALLOC_SPARE_ZONE = 1 << 12, M0_BALLOC_NORMAL_ZONE = 1 << 13 }

enum	m0_balloc_group_info_state { M0_BALLOC_GROUP_INFO_INIT = 1 << 0, M0_BALLOC_GROUP_INFO_DIRTY = 1 << 1 }

enum	m0_balloc_super_block_state { M0_BALLOC_SB_DIRTY = 1 << 0 }

enum	m0_balloc_super_block_version { M0_BALLOC_SB_VERSION = 1ULL }

enum	{ M0_BALLOC_BUDDY_LOOKUP_MAX = 10 }

enum	m0_balloc_format_version { M0_BALLOC_FORMAT_VERSION_1 = 1, M0_BALLOC_FORMAT_VERSION = M0_BALLOC_FORMAT_VERSION_1 }

enum	{ BALLOC_DEF_CONTAINER_SIZE = 4096ULL * 32 * 1024 * 1000, BALLOC_DEF_BLOCK_SHIFT = 12, BALLOC_DEF_GROUPS_NR = 64, BALLOC_DEF_BLOCKS_PER_GROUP = 32768 }

Functions
struct m0_balloc_group_desc	M0_XCA_DOMAIN (be)

static struct m0_balloc *	b2m0 (const struct m0_ad_balloc *ballroom)

M0_INTERNAL void	m0_balloc_init (struct m0_balloc *cb)

M0_INTERNAL int	m0_balloc_create (uint64_t cid, struct m0_be_seg seg, struct m0_sm_group grp, struct m0_balloc *out, const struct m0_fid fid)

M0_INTERNAL void	m0_balloc_group_desc_init (struct m0_balloc_group_desc *desc)

M0_INTERNAL void	m0_balloc_debug_dump_sb (const char tag, struct m0_balloc_super_block sb)

M0_INTERNAL void	m0_balloc_debug_dump_group_extent (const char tag, struct m0_balloc_group_info grp)

M0_INTERNAL int	m0_balloc_release_extents (struct m0_balloc_group_info *grp)

M0_INTERNAL int	m0_balloc_load_extents (struct m0_balloc cb, struct m0_balloc_group_info grp)

M0_INTERNAL struct m0_balloc_group_info *	m0_balloc_gn2info (struct m0_balloc *cb, m0_bindex_t groupno)

M0_INTERNAL void	m0_balloc_debug_dump_group (const char tag, struct m0_balloc_group_info grp)

M0_INTERNAL void	m0_balloc_lock_group (struct m0_balloc_group_info *grp)

M0_INTERNAL int	m0_balloc_trylock_group (struct m0_balloc_group_info *grp)

M0_INTERNAL void	m0_balloc_unlock_group (struct m0_balloc_group_info *grp)

Variables
enum m0_balloc_group_desc_format_version	M0_XCA_DOMAIN

Detailed Description

All data structures stored in db in little-endian format (Intel CPU endian). To correctly compare the key value, a custom specific comparison function is provided to db.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

Enumerator
M0_BALLOC_BUDDY_LOOKUP_MAX

Definition at line 212 of file balloc.h.

◆ anonymous enum

anonymous enum

Enumerator
BALLOC_DEF_CONTAINER_SIZE	Todo: should equal to size of HDD
BALLOC_DEF_BLOCK_SHIFT
BALLOC_DEF_GROUPS_NR	Approximate number of groups. Exact number of groups can differ depending on group size restrictions.
BALLOC_DEF_BLOCKS_PER_GROUP	Used as minimal group size

Definition at line 327 of file balloc.h.

◆ m0_balloc_allocation_flag

enum m0_balloc_allocation_flag

Enumerator
M0_BALLOC_HINT_MERGE	prefer goal again. length
M0_BALLOC_HINT_RESERVED	blocks already reserved
M0_BALLOC_HINT_METADATA	metadata is being allocated
M0_BALLOC_HINT_FIRST	use the first found extent
M0_BALLOC_HINT_BEST	search for the best chunk
M0_BALLOC_HINT_DATA	data is being allocated
M0_BALLOC_HINT_NOPREALLOC	don't preallocate (for tails)
M0_BALLOC_HINT_GROUP_ALLOC	allocate for locality group
M0_BALLOC_HINT_GOAL_ONLY	allocate goal blocks or none
M0_BALLOC_HINT_TRY_GOAL	goal is meaningful
M0_BALLOC_DELALLOC_RESERVED	blocks already pre-reserved by delayed allocation
M0_BALLOC_STREAM_ALLOC	We are doing stream allocation
M0_BALLOC_SPARE_ZONE	Allocate in spare zone.
M0_BALLOC_NORMAL_ZONE	Allocate in normal zone.