dnode Struct Reference

#include <dnode.h>

Collaboration diagram for dnode:

Data Fields
krwlock_t	dn_struct_rwlock
	Protects the structure of the dnode, including the number of levels of indirection (dn_nlevels), dn_maxblkid, and dn_next_*.
list_node_t	dn_link
	Our link on dn_objset->os_dnodes list; protected by os_lock.
kmutex_t	dn_dbufs_mtx
list_t	dn_dbufs
	descendent dbufs
boolean_t	dn_have_spill
	have spill or are spilling
struct zfetch	dn_zfetch
	holds prefetch structure
Immutable
struct objset *	dn_objset
uint64_t	dn_object
struct dmu_buf_impl *	dn_dbuf
struct dnode_handle *	dn_handle
dnode_phys_t *	dn_phys
	pointer into dn->dn_dbuf->db.db_data
Copies of stuff in dn_phys
They're valid in the open context (eg. even before the dnode is first synced). Where necessary, these are protected by dn_struct_rwlock.
dmu_object_type_t	dn_type
	object type
uint16_t	dn_bonuslen
	bonus length
uint8_t	dn_bonustype
	bonus type
uint8_t	dn_nblkptr
	number of blkptrs (immutable)
uint8_t	dn_checksum
	ZIO_CHECKSUM type.
uint8_t	dn_compress
	ZIO_COMPRESS type.
uint8_t	dn_nlevels
uint8_t	dn_indblkshift
uint8_t	dn_datablkshift
	zero if blksz not power of 2!
uint8_t	dn_moved
	Has this dnode been moved?
uint16_t	dn_datablkszsec
	in 512b sectors
uint32_t	dn_datablksz
	in bytes
uint64_t	dn_maxblkid
uint8_t	dn_next_nblkptr [TXG_SIZE]
uint8_t	dn_next_nlevels [TXG_SIZE]
uint8_t	dn_next_indblkshift [TXG_SIZE]
uint8_t	dn_next_bonustype [TXG_SIZE]
uint8_t	dn_rm_spillblk [TXG_SIZE]
	for removing spill blk
uint16_t	dn_next_bonuslen [TXG_SIZE]
uint32_t	dn_next_blksz [TXG_SIZE]
	next block size in bytes
Protected by dn_dbufs_mtx
declared here to fill 32-bit hole
uint32_t	dn_dbufs_count
	count of dn_dbufs
Protected by os_lock
list_node_t	dn_dirty_link [TXG_SIZE]
	next on dataset's dirty
Protected by dn_mtx
kmutex_t	dn_mtx
list_t	dn_dirty_records [TXG_SIZE]
avl_tree_t	dn_ranges [TXG_SIZE]
uint64_t	dn_allocated_txg
uint64_t	dn_free_txg
uint64_t	dn_assigned_txg
kcondvar_t	dn_notxholds
enum dnode_dirtycontext	dn_dirtyctx
uint8_t *	dn_dirtyctx_firstset
	dbg: contents meaningless
Protected by own devices
refcount_t	dn_tx_holds
refcount_t	dn_holds
Protected by dn_struct_rwlock
struct dmu_buf_impl *	dn_bonus
	bonus buffer dbuf
Parent IO for current sync write
zio_t *	dn_zio
Used in syncing context
uint64_t	dn_oldused
	old phys used bytes
uint64_t	dn_oldflags
	old phys dn_flags
uint64_t	dn_olduid
uint64_t	dn_oldgid
uint64_t	dn_newuid
uint64_t	dn_newgid
int	dn_id_flags

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Detailed Description

Definition at line 156 of file dnode.h.

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Field Documentation

uint64_t dnode::dn_allocated_txg

Definition at line 224 of file dnode.h.

uint64_t dnode::dn_assigned_txg

Definition at line 226 of file dnode.h.

struct dmu_buf_impl* dnode::dn_bonus

bonus buffer dbuf

Definition at line 245 of file dnode.h.

uint16_t dnode::dn_bonuslen

bonus length

Definition at line 184 of file dnode.h.

uint8_t dnode::dn_bonustype

bonus type

Definition at line 185 of file dnode.h.

uint8_t dnode::dn_checksum

ZIO_CHECKSUM type.

Definition at line 187 of file dnode.h.

uint8_t dnode::dn_compress

ZIO_COMPRESS type.

Definition at line 188 of file dnode.h.

uint8_t dnode::dn_datablkshift

zero if blksz not power of 2!

Definition at line 191 of file dnode.h.

uint32_t dnode::dn_datablksz

in bytes

Definition at line 194 of file dnode.h.

uint16_t dnode::dn_datablkszsec

in 512b sectors

Definition at line 193 of file dnode.h.

struct dmu_buf_impl* dnode::dn_dbuf

Definition at line 171 of file dnode.h.

list_t dnode::dn_dbufs

descendent dbufs

Definition at line 240 of file dnode.h.

uint32_t dnode::dn_dbufs_count

count of dn_dbufs

Definition at line 209 of file dnode.h.

kmutex_t dnode::dn_dbufs_mtx

Definition at line 239 of file dnode.h.

list_node_t dnode::dn_dirty_link[TXG_SIZE]

next on dataset's dirty

Definition at line 215 of file dnode.h.

list_t dnode::dn_dirty_records[TXG_SIZE]

Definition at line 222 of file dnode.h.

enum dnode_dirtycontext dnode::dn_dirtyctx

Definition at line 228 of file dnode.h.

uint8_t* dnode::dn_dirtyctx_firstset

dbg: contents meaningless

Definition at line 229 of file dnode.h.

uint64_t dnode::dn_free_txg

Definition at line 225 of file dnode.h.

struct dnode_handle* dnode::dn_handle

Definition at line 172 of file dnode.h.

boolean_t dnode::dn_have_spill

have spill or are spilling

Definition at line 248 of file dnode.h.

refcount_t dnode::dn_holds

Definition at line 236 of file dnode.h.

int dnode::dn_id_flags

Definition at line 263 of file dnode.h.

uint8_t dnode::dn_indblkshift

Definition at line 190 of file dnode.h.

list_node_t dnode::dn_link

Our link on dn_objset->os_dnodes list; protected by os_lock.

Definition at line 164 of file dnode.h.

uint64_t dnode::dn_maxblkid

Definition at line 195 of file dnode.h.

uint8_t dnode::dn_moved

Has this dnode been moved?

Definition at line 192 of file dnode.h.

kmutex_t dnode::dn_mtx

Definition at line 221 of file dnode.h.

uint8_t dnode::dn_nblkptr

number of blkptrs (immutable)

Definition at line 186 of file dnode.h.

uint64_t dnode::dn_newgid

Definition at line 262 of file dnode.h.

uint64_t dnode::dn_newuid

Definition at line 262 of file dnode.h.

uint32_t dnode::dn_next_blksz[TXG_SIZE]

next block size in bytes

Definition at line 202 of file dnode.h.

uint16_t dnode::dn_next_bonuslen[TXG_SIZE]

Definition at line 201 of file dnode.h.

uint8_t dnode::dn_next_bonustype[TXG_SIZE]

Definition at line 199 of file dnode.h.

uint8_t dnode::dn_next_indblkshift[TXG_SIZE]

Definition at line 198 of file dnode.h.

uint8_t dnode::dn_next_nblkptr[TXG_SIZE]

Definition at line 196 of file dnode.h.

uint8_t dnode::dn_next_nlevels[TXG_SIZE]

Definition at line 197 of file dnode.h.

uint8_t dnode::dn_nlevels

Definition at line 189 of file dnode.h.

kcondvar_t dnode::dn_notxholds

Definition at line 227 of file dnode.h.

uint64_t dnode::dn_object

Definition at line 170 of file dnode.h.

struct objset* dnode::dn_objset

Definition at line 169 of file dnode.h.

uint64_t dnode::dn_oldflags

old phys dn_flags

Definition at line 260 of file dnode.h.

uint64_t dnode::dn_oldgid

Definition at line 261 of file dnode.h.

uint64_t dnode::dn_olduid

Definition at line 261 of file dnode.h.

uint64_t dnode::dn_oldused

old phys used bytes

Definition at line 259 of file dnode.h.

dnode_phys_t* dnode::dn_phys

pointer into dn->dn_dbuf->db.db_data

Definition at line 173 of file dnode.h.

avl_tree_t dnode::dn_ranges[TXG_SIZE]

Definition at line 223 of file dnode.h.

uint8_t dnode::dn_rm_spillblk[TXG_SIZE]

for removing spill blk

Definition at line 200 of file dnode.h.

krwlock_t dnode::dn_struct_rwlock

Protects the structure of the dnode, including the number of levels of indirection (dn_nlevels), dn_maxblkid, and dn_next_*.

Definition at line 161 of file dnode.h.

refcount_t dnode::dn_tx_holds

Definition at line 235 of file dnode.h.

dmu_object_type_t dnode::dn_type

object type

Definition at line 183 of file dnode.h.

struct zfetch dnode::dn_zfetch

holds prefetch structure

Definition at line 267 of file dnode.h.

zio_t* dnode::dn_zio

Definition at line 253 of file dnode.h.

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The documentation for this struct was generated from the following file:

• sys/dnode.h