xref: /freebsd/contrib/file/magic/Magdir/zfs (revision 43a5ec4eb41567cc92586503212743d89686d78f)

#------------------------------------------------------------------------------
# zfs:	file(1) magic for ZFS dumps
#
# From <rea-fbsd@codelabs.ru>
# 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'