#------------------------------------------------------------------------------
# zfs: file(1) magic for ZFS dumps
#
# From <
[email protected]>
# ZFS dump header has the following structure (as per zfs_ioctl.h
# in FreeBSD with drr_type is set to DRR_BEGIN)
#
# enum {
# DRR_BEGIN, DRR_OBJECT, DRR_FREEOBJECTS,
# DRR_WRITE, DRR_FREE, DRR_END,
# } drr_type;
# uint32_t drr_pad;
# uint64_t drr_magic;
# uint64_t drr_version;
# uint64_t drr_creation_time;
# dmu_objset_type_t drr_type;
# uint32_t drr_pad;
# uint64_t drr_toguid;
# uint64_t drr_fromguid;
# char drr_toname[MAXNAMELEN];
#
# Backup magic is 0x00000002f5bacbac (quad word)
# The drr_type is defined as
# typedef enum dmu_objset_type {
# DMU_OST_NONE,
# DMU_OST_META,
# DMU_OST_ZFS,
# DMU_OST_ZVOL,
# DMU_OST_OTHER, /* For testing only! */
# DMU_OST_ANY, /* Be careful! */
# DMU_OST_NUMTYPES
# } dmu_objset_type_t;
#
# Almost all uint64_t fields are printed as the 32-bit ones (with high
# 32 bits zeroed), because there is no simple way to print them as the
# full 64-bit values.
# Big-endian values
8 string \000\000\000\002\365\272\313\254 ZFS snapshot (big-endian machine),
>20 belong x version %u,
>32 belong 0 type: NONE,
>32 belong 1 type: META,
>32 belong 2 type: ZFS,
>32 belong 3 type: ZVOL,
>32 belong 4 type: OTHER,
>32 belong 5 type: ANY,
>32 belong >5 type: UNKNOWN (%u),
>40 byte x destination GUID: %02X
>41 byte x %02X
>42 byte x %02X
>43 byte x %02X
>44 byte x %02X
>45 byte x %02X
>46 byte x %02X
>47 byte x %02X,
>48 ulong >0
>>52 ulong >0
>>>48 byte x source GUID: %02X
>>>49 byte x %02X
>>>50 byte x %02X
>>>51 byte x %02X
>>>52 byte x %02X
>>>53 byte x %02X
>>>54 byte x %02X
>>>55 byte x %02X,
>56 string >\0 name: '%s'
# Little-endian values
8 string \254\313\272\365\002\000\000\000 ZFS snapshot (little-endian machine),
>16 lelong x version %u,
>32 lelong 0 type: NONE,
>32 lelong 1 type: META,
>32 lelong 2 type: ZFS,
>32 lelong 3 type: ZVOL,
>32 lelong 4 type: OTHER,
>32 lelong 5 type: ANY,
>32 lelong >5 type: UNKNOWN (%u),
>47 byte x destination GUID: %02X
>46 byte x %02X
>45 byte x %02X
>44 byte x %02X
>43 byte x %02X
>42 byte x %02X
>41 byte x %02X
>40 byte x %02X,
>48 ulong >0
>>52 ulong >0
>>>55 byte x source GUID: %02X
>>>54 byte x %02X
>>>53 byte x %02X
>>>52 byte x %02X
>>>51 byte x %02X
>>>50 byte x %02X
>>>49 byte x %02X
>>>48 byte x %02X,
>56 string >\0 name: '%s'
