contrib/pyzfs/libzfs_core/_constants.py

   1 #
   2 # Copyright 2015 ClusterHQ
   3 #
   4 # Licensed under the Apache License, Version 2.0 (the "License");
   5 # you may not use this file except in compliance with the License.
   6 # You may obtain a copy of the License at
   7 #
   8 #    http://www.apache.org/licenses/LICENSE-2.0
   9 #
  10 # Unless required by applicable law or agreed to in writing, software
  11 # distributed under the License is distributed on an "AS IS" BASIS,
  12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 # See the License for the specific language governing permissions and
  14 # limitations under the License.
  15 #
  16
  17 """
  18 Important `libzfs_core` constants.
  19 """
  20
  21 from __future__ import absolute_import, division, print_function
  22 import errno
  23 import sys
  24
  25
  26 # Compat for platform-specific errnos
  27 if sys.platform.startswith('freebsd'):
  28     ECHRNG = errno.ENXIO
  29     ECKSUM = 97  # EINTEGRITY
  30     ETIME = errno.ETIMEDOUT
  31 else:
  32     ECHRNG = errno.ECHRNG
  33     ECKSUM = errno.EBADE
  34     ETIME = errno.ETIME
  35
  36
  37 # https://stackoverflow.com/a/1695250
  38 def enum_with_offset(offset, sequential, named):
  39     enums = dict(((b, a + offset) for a, b in enumerate(sequential)), **named)
  40     return type('Enum', (), enums)
  41
  42
  43 def enum(*sequential, **named):
  44     return enum_with_offset(0, sequential, named)
  45
  46
  47 #: Maximum length of any ZFS name.
  48 MAXNAMELEN = 255
  49 #: Default channel program limits
  50 ZCP_DEFAULT_INSTRLIMIT = 10 * 1000 * 1000
  51 ZCP_DEFAULT_MEMLIMIT = 10 * 1024 * 1024
  52 #: Encryption wrapping key length
  53 WRAPPING_KEY_LEN = 32
  54 #: Encryption key location enum
  55 zfs_key_location = enum(
  56     'ZFS_KEYLOCATION_NONE',
  57     'ZFS_KEYLOCATION_PROMPT',
  58     'ZFS_KEYLOCATION_URI'
  59 )
  60 #: Encryption key format enum
  61 zfs_keyformat = enum(
  62     'ZFS_KEYFORMAT_NONE',
  63     'ZFS_KEYFORMAT_RAW',
  64     'ZFS_KEYFORMAT_HEX',
  65     'ZFS_KEYFORMAT_PASSPHRASE'
  66 )
  67 # Encryption algorithms enum
  68 zio_encrypt = enum(
  69     'ZIO_CRYPT_INHERIT',
  70     'ZIO_CRYPT_ON',
  71     'ZIO_CRYPT_OFF',
  72     'ZIO_CRYPT_AES_128_CCM',
  73     'ZIO_CRYPT_AES_192_CCM',
  74     'ZIO_CRYPT_AES_256_CCM',
  75     'ZIO_CRYPT_AES_128_GCM',
  76     'ZIO_CRYPT_AES_192_GCM',
  77     'ZIO_CRYPT_AES_256_GCM'
  78 )
  79 # ZFS-specific error codes
  80 zfs_errno = enum_with_offset(1024, [
  81         'ZFS_ERR_CHECKPOINT_EXISTS',
  82         'ZFS_ERR_DISCARDING_CHECKPOINT',
  83         'ZFS_ERR_NO_CHECKPOINT',
  84         'ZFS_ERR_DEVRM_IN_PROGRESS',
  85         'ZFS_ERR_VDEV_TOO_BIG',
  86         'ZFS_ERR_IOC_CMD_UNAVAIL',
  87         'ZFS_ERR_IOC_ARG_UNAVAIL',
  88         'ZFS_ERR_IOC_ARG_REQUIRED',
  89         'ZFS_ERR_IOC_ARG_BADTYPE',
  90         'ZFS_ERR_WRONG_PARENT',
  91         'ZFS_ERR_FROM_IVSET_GUID_MISSING',
  92         'ZFS_ERR_FROM_IVSET_GUID_MISMATCH',
  93         'ZFS_ERR_SPILL_BLOCK_FLAG_MISSING',
  94         'ZFS_ERR_UNKNOWN_SEND_STREAM_FEATURE',
  95         'ZFS_ERR_EXPORT_IN_PROGRESS',
  96         'ZFS_ERR_BOOKMARK_SOURCE_NOT_ANCESTOR',
  97         'ZFS_ERR_STREAM_TRUNCATED',
  98         'ZFS_ERR_STREAM_LARGE_BLOCK_MISMATCH',
  99         'ZFS_ERR_RESILVER_IN_PROGRESS',
 100         'ZFS_ERR_REBUILD_IN_PROGRESS',
 101     ],
 102     {}
 103 )
 104 # compat before we used the enum helper for these values
 105 ZFS_ERR_CHECKPOINT_EXISTS = zfs_errno.ZFS_ERR_CHECKPOINT_EXISTS
 106 assert(ZFS_ERR_CHECKPOINT_EXISTS == 1024)
 107 ZFS_ERR_DISCARDING_CHECKPOINT = zfs_errno.ZFS_ERR_DISCARDING_CHECKPOINT
 108 ZFS_ERR_NO_CHECKPOINT = zfs_errno.ZFS_ERR_NO_CHECKPOINT
 109 ZFS_ERR_DEVRM_IN_PROGRESS = zfs_errno.ZFS_ERR_DEVRM_IN_PROGRESS
 110 ZFS_ERR_VDEV_TOO_BIG = zfs_errno.ZFS_ERR_VDEV_TOO_BIG
 111 ZFS_ERR_WRONG_PARENT = zfs_errno.ZFS_ERR_WRONG_PARENT
 112
 113
 114 # vim: softtabstop=4 tabstop=4 expandtab shiftwidth=4