#------------------------------------------------------------------------------ # zfs: file(1) magic for ZFS dumps # # From # 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 shapshot (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 shapshot (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'