drr_begin Struct Reference

zfs ioctl command structure More...

#include <zfs_ioctl.h>

Data Fields
uint64_t	drr_magic
uint64_t	drr_versioninfo
	formerly named drr_version
uint64_t	drr_creation_time
dmu_objset_type_t	drr_type
uint32_t	drr_flags
uint64_t	drr_toguid
uint64_t	drr_fromguid
char	drr_toname [MAXNAMELEN]

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Detailed Description

zfs ioctl command structure

Definition at line 101 of file zfs_ioctl.h.

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Field Documentation

uint64_t drr_begin::drr_creation_time

Definition at line 124 of file zfs_ioctl.h.

uint32_t drr_begin::drr_flags

Definition at line 126 of file zfs_ioctl.h.

uint64_t drr_begin::drr_fromguid

Definition at line 128 of file zfs_ioctl.h.

uint64_t drr_begin::drr_magic

Definition at line 102 of file zfs_ioctl.h.

uint64_t drr_begin::drr_toguid

Definition at line 127 of file zfs_ioctl.h.

char drr_begin::drr_toname[MAXNAMELEN]

Definition at line 129 of file zfs_ioctl.h.

dmu_objset_type_t drr_begin::drr_type

Definition at line 125 of file zfs_ioctl.h.

uint64_t drr_begin::drr_versioninfo

formerly named drr_version

The drr_versioninfo field of the dmu_replay_record has the following layout:

	    64      56      48      40      32      24      16      8       0
	    +-------+-------+-------+-------+-------+-------+-------+-------+
	    |               reserved        |        feature-flags      |C|S|
	    +-------+-------+-------+-------+-------+-------+-------+-------+
	 

The low order two bits indicate the header type: SUBSTREAM (0x1) or COMPOUNDSTREAM (0x2). Using two bits for this is historical: this field used to be a version number, where the two version types were 1 and 2. Using two bits for this allows earlier versions of the code to be able to recognize send streams that don't use any of the features indicated by feature flags.

Definition at line 123 of file zfs_ioctl.h.

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

• sys/zfs_ioctl.h