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freebsd-nq/module/zcommon/zfs_prop.c
Tom Caputi b525630342 Native Encryption for ZFS on Linux 
This change incorporates three major pieces:

The first change is a keystore that manages wrapping
and encryption keys for encrypted datasets. These
commands mostly involve manipulating the new
DSL Crypto Key ZAP Objects that live in the MOS. Each
encrypted dataset has its own DSL Crypto Key that is
protected with a user's key. This level of indirection
allows users to change their keys without re-encrypting
their entire datasets. The change implements the new
subcommands "zfs load-key", "zfs unload-key" and
"zfs change-key" which allow the user to manage their
encryption keys and settings. In addition, several new
flags and properties have been added to allow dataset
creation and to make mounting and unmounting more
convenient.

The second piece of this patch provides the ability to
encrypt, decyrpt, and authenticate protected datasets.
Each object set maintains a Merkel tree of Message
Authentication Codes that protect the lower layers,
similarly to how checksums are maintained. This part
impacts the zio layer, which handles the actual
encryption and generation of MACs, as well as the ARC
and DMU, which need to be able to handle encrypted
buffers and protected data.

The last addition is the ability to do raw, encrypted
sends and receives. The idea here is to send raw
encrypted and compressed data and receive it exactly
as is on a backup system. This means that the dataset
on the receiving system is protected using the same
user key that is in use on the sending side. By doing
so, datasets can be efficiently backed up to an
untrusted system without fear of data being
compromised.

Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Jorgen Lundman <lundman@lundman.net>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes #494 
Closes #5769
2017-08-14 10:36:48 -07:00

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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2011, 2014 by Delphix. All rights reserved.
* Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
* Copyright 2016, Joyent, Inc.
*/
/* Portions Copyright 2010 Robert Milkowski */
#include <sys/zio.h>
#include <sys/spa.h>
#include <sys/u8_textprep.h>
#include <sys/zfs_acl.h>
#include <sys/zfs_ioctl.h>
#include <sys/zfs_znode.h>
#include <sys/dsl_crypt.h>
#include "zfs_prop.h"
#include "zfs_deleg.h"
#include "zfs_fletcher.h"
#if defined(_KERNEL)
#include <sys/systm.h>
#else
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#endif
static zprop_desc_t zfs_prop_table[ZFS_NUM_PROPS];
/* Note this is indexed by zfs_userquota_prop_t, keep the order the same */
const char *zfs_userquota_prop_prefixes[] = {
"userused@",
"userquota@",
"groupused@",
"groupquota@",
"userobjused@",
"userobjquota@",
"groupobjused@",
"groupobjquota@"
};
zprop_desc_t *
zfs_prop_get_table(void)
{
return (zfs_prop_table);
}
void
zfs_prop_init(void)
{
static zprop_index_t checksum_table[] = {
{ "on", ZIO_CHECKSUM_ON },
{ "off", ZIO_CHECKSUM_OFF },
{ "fletcher2", ZIO_CHECKSUM_FLETCHER_2 },
{ "fletcher4", ZIO_CHECKSUM_FLETCHER_4 },
{ "sha256", ZIO_CHECKSUM_SHA256 },
{ "noparity", ZIO_CHECKSUM_NOPARITY },
{ "sha512", ZIO_CHECKSUM_SHA512 },
{ "skein", ZIO_CHECKSUM_SKEIN },
{ "edonr", ZIO_CHECKSUM_EDONR },
{ NULL }
};
static zprop_index_t dedup_table[] = {
{ "on", ZIO_CHECKSUM_ON },
{ "off", ZIO_CHECKSUM_OFF },
{ "verify", ZIO_CHECKSUM_ON | ZIO_CHECKSUM_VERIFY },
{ "sha256", ZIO_CHECKSUM_SHA256 },
{ "sha256,verify",
ZIO_CHECKSUM_SHA256 | ZIO_CHECKSUM_VERIFY },
{ "sha512", ZIO_CHECKSUM_SHA512 },
{ "sha512,verify",
ZIO_CHECKSUM_SHA512 | ZIO_CHECKSUM_VERIFY },
{ "skein", ZIO_CHECKSUM_SKEIN },
{ "skein,verify",
ZIO_CHECKSUM_SKEIN | ZIO_CHECKSUM_VERIFY },
{ "edonr,verify",
ZIO_CHECKSUM_EDONR | ZIO_CHECKSUM_VERIFY },
{ NULL }
};
static zprop_index_t compress_table[] = {
{ "on", ZIO_COMPRESS_ON },
{ "off", ZIO_COMPRESS_OFF },
{ "lzjb", ZIO_COMPRESS_LZJB },
{ "gzip", ZIO_COMPRESS_GZIP_6 }, /* gzip default */
{ "gzip-1", ZIO_COMPRESS_GZIP_1 },
{ "gzip-2", ZIO_COMPRESS_GZIP_2 },
{ "gzip-3", ZIO_COMPRESS_GZIP_3 },
{ "gzip-4", ZIO_COMPRESS_GZIP_4 },
{ "gzip-5", ZIO_COMPRESS_GZIP_5 },
{ "gzip-6", ZIO_COMPRESS_GZIP_6 },
{ "gzip-7", ZIO_COMPRESS_GZIP_7 },
{ "gzip-8", ZIO_COMPRESS_GZIP_8 },
{ "gzip-9", ZIO_COMPRESS_GZIP_9 },
{ "zle", ZIO_COMPRESS_ZLE },
{ "lz4", ZIO_COMPRESS_LZ4 },
{ NULL }
};
static zprop_index_t crypto_table[] = {
{ "on", ZIO_CRYPT_ON },
{ "off", ZIO_CRYPT_OFF },
{ "aes-128-ccm", ZIO_CRYPT_AES_128_CCM },
{ "aes-192-ccm", ZIO_CRYPT_AES_192_CCM },
{ "aes-256-ccm", ZIO_CRYPT_AES_256_CCM },
{ "aes-128-gcm", ZIO_CRYPT_AES_128_GCM },
{ "aes-192-gcm", ZIO_CRYPT_AES_192_GCM },
{ "aes-256-gcm", ZIO_CRYPT_AES_256_GCM },
{ NULL }
};
static zprop_index_t keyformat_table[] = {
{ "none", ZFS_KEYFORMAT_NONE },
{ "raw", ZFS_KEYFORMAT_RAW },
{ "hex", ZFS_KEYFORMAT_HEX },
{ "passphrase", ZFS_KEYFORMAT_PASSPHRASE },
{ NULL }
};
static zprop_index_t snapdir_table[] = {
{ "hidden", ZFS_SNAPDIR_HIDDEN },
{ "visible", ZFS_SNAPDIR_VISIBLE },
{ NULL }
};
static zprop_index_t snapdev_table[] = {
{ "hidden", ZFS_SNAPDEV_HIDDEN },
{ "visible", ZFS_SNAPDEV_VISIBLE },
{ NULL }
};
static zprop_index_t acltype_table[] = {
{ "off", ZFS_ACLTYPE_OFF },
{ "disabled", ZFS_ACLTYPE_OFF },
{ "noacl", ZFS_ACLTYPE_OFF },
{ "posixacl", ZFS_ACLTYPE_POSIXACL },
{ NULL }
};
static zprop_index_t acl_inherit_table[] = {
{ "discard", ZFS_ACL_DISCARD },
{ "noallow", ZFS_ACL_NOALLOW },
{ "restricted", ZFS_ACL_RESTRICTED },
{ "passthrough", ZFS_ACL_PASSTHROUGH },
{ "secure", ZFS_ACL_RESTRICTED }, /* bkwrd compatibility */
{ "passthrough-x", ZFS_ACL_PASSTHROUGH_X },
{ NULL }
};
static zprop_index_t case_table[] = {
{ "sensitive", ZFS_CASE_SENSITIVE },
{ "insensitive", ZFS_CASE_INSENSITIVE },
{ "mixed", ZFS_CASE_MIXED },
{ NULL }
};
static zprop_index_t copies_table[] = {
{ "1", 1 },
{ "2", 2 },
{ "3", 3 },
{ NULL }
};
/*
* Use the unique flags we have to send to u8_strcmp() and/or
* u8_textprep() to represent the various normalization property
* values.
*/
static zprop_index_t normalize_table[] = {
{ "none", 0 },
{ "formD", U8_TEXTPREP_NFD },
{ "formKC", U8_TEXTPREP_NFKC },
{ "formC", U8_TEXTPREP_NFC },
{ "formKD", U8_TEXTPREP_NFKD },
{ NULL }
};
static zprop_index_t version_table[] = {
{ "1", 1 },
{ "2", 2 },
{ "3", 3 },
{ "4", 4 },
{ "5", 5 },
{ "current", ZPL_VERSION },
{ NULL }
};
static zprop_index_t boolean_table[] = {
{ "off", 0 },
{ "on", 1 },
{ NULL }
};
static zprop_index_t keystatus_table[] = {
{ "none", ZFS_KEYSTATUS_NONE},
{ "unavailable", ZFS_KEYSTATUS_UNAVAILABLE},
{ "available", ZFS_KEYSTATUS_AVAILABLE},
{ NULL }
};
static zprop_index_t logbias_table[] = {
{ "latency", ZFS_LOGBIAS_LATENCY },
{ "throughput", ZFS_LOGBIAS_THROUGHPUT },
{ NULL }
};
static zprop_index_t canmount_table[] = {
{ "off", ZFS_CANMOUNT_OFF },
{ "on", ZFS_CANMOUNT_ON },
{ "noauto", ZFS_CANMOUNT_NOAUTO },
{ NULL }
};
static zprop_index_t cache_table[] = {
{ "none", ZFS_CACHE_NONE },
{ "metadata", ZFS_CACHE_METADATA },
{ "all", ZFS_CACHE_ALL },
{ NULL }
};
static zprop_index_t sync_table[] = {
{ "standard", ZFS_SYNC_STANDARD },
{ "always", ZFS_SYNC_ALWAYS },
{ "disabled", ZFS_SYNC_DISABLED },
{ NULL }
};
static zprop_index_t xattr_table[] = {
{ "off", ZFS_XATTR_OFF },
{ "on", ZFS_XATTR_DIR },
{ "sa", ZFS_XATTR_SA },
{ "dir", ZFS_XATTR_DIR },
{ NULL }
};
static zprop_index_t dnsize_table[] = {
{ "legacy", ZFS_DNSIZE_LEGACY },
{ "auto", ZFS_DNSIZE_AUTO },
{ "1k", ZFS_DNSIZE_1K },
{ "2k", ZFS_DNSIZE_2K },
{ "4k", ZFS_DNSIZE_4K },
{ "8k", ZFS_DNSIZE_8K },
{ "16k", ZFS_DNSIZE_16K },
{ NULL }
};
static zprop_index_t redundant_metadata_table[] = {
{ "all", ZFS_REDUNDANT_METADATA_ALL },
{ "most", ZFS_REDUNDANT_METADATA_MOST },
{ NULL }
};
static zprop_index_t volmode_table[] = {
{ "default", ZFS_VOLMODE_DEFAULT },
{ "full", ZFS_VOLMODE_GEOM },
{ "geom", ZFS_VOLMODE_GEOM },
{ "dev", ZFS_VOLMODE_DEV },
{ "none", ZFS_VOLMODE_NONE },
{ NULL }
};
/* inherit index properties */
zprop_register_index(ZFS_PROP_REDUNDANT_METADATA, "redundant_metadata",
ZFS_REDUNDANT_METADATA_ALL,
PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
"all | most", "REDUND_MD",
redundant_metadata_table);
zprop_register_index(ZFS_PROP_SYNC, "sync", ZFS_SYNC_STANDARD,
PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
"standard | always | disabled", "SYNC",
sync_table);
zprop_register_index(ZFS_PROP_CHECKSUM, "checksum",
ZIO_CHECKSUM_DEFAULT, PROP_INHERIT, ZFS_TYPE_FILESYSTEM |
ZFS_TYPE_VOLUME,
"on | off | fletcher2 | fletcher4 | sha256 | sha512 | "
"skein | edonr", "CHECKSUM", checksum_table);
zprop_register_index(ZFS_PROP_DEDUP, "dedup", ZIO_CHECKSUM_OFF,
PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
"on | off | verify | sha256[,verify], sha512[,verify], "
"skein[,verify], edonr,verify", "DEDUP", dedup_table);
zprop_register_index(ZFS_PROP_COMPRESSION, "compression",
ZIO_COMPRESS_DEFAULT, PROP_INHERIT,
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
"on | off | lzjb | gzip | gzip-[1-9] | zle | lz4", "COMPRESS",
compress_table);
zprop_register_index(ZFS_PROP_SNAPDIR, "snapdir", ZFS_SNAPDIR_HIDDEN,
PROP_INHERIT, ZFS_TYPE_FILESYSTEM,
"hidden | visible", "SNAPDIR", snapdir_table);
zprop_register_index(ZFS_PROP_SNAPDEV, "snapdev", ZFS_SNAPDEV_HIDDEN,
PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
"hidden | visible", "SNAPDEV", snapdev_table);
zprop_register_index(ZFS_PROP_ACLTYPE, "acltype", ZFS_ACLTYPE_OFF,
PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
"noacl | posixacl", "ACLTYPE", acltype_table);
zprop_register_index(ZFS_PROP_ACLINHERIT, "aclinherit",
ZFS_ACL_RESTRICTED, PROP_INHERIT, ZFS_TYPE_FILESYSTEM,
"discard | noallow | restricted | passthrough | passthrough-x",
"ACLINHERIT", acl_inherit_table);
zprop_register_index(ZFS_PROP_COPIES, "copies", 1, PROP_INHERIT,
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
"1 | 2 | 3", "COPIES", copies_table);
zprop_register_index(ZFS_PROP_PRIMARYCACHE, "primarycache",
ZFS_CACHE_ALL, PROP_INHERIT,
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT | ZFS_TYPE_VOLUME,
"all | none | metadata", "PRIMARYCACHE", cache_table);
zprop_register_index(ZFS_PROP_SECONDARYCACHE, "secondarycache",
ZFS_CACHE_ALL, PROP_INHERIT,
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT | ZFS_TYPE_VOLUME,
"all | none | metadata", "SECONDARYCACHE", cache_table);
zprop_register_index(ZFS_PROP_LOGBIAS, "logbias", ZFS_LOGBIAS_LATENCY,
PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
"latency | throughput", "LOGBIAS", logbias_table);
zprop_register_index(ZFS_PROP_XATTR, "xattr", ZFS_XATTR_DIR,
PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
"on | off | dir | sa", "XATTR", xattr_table);
zprop_register_index(ZFS_PROP_DNODESIZE, "dnodesize",
ZFS_DNSIZE_LEGACY, PROP_INHERIT, ZFS_TYPE_FILESYSTEM,
"legacy | auto | 1k | 2k | 4k | 8k | 16k", "DNSIZE", dnsize_table);
zprop_register_index(ZFS_PROP_VOLMODE, "volmode",
ZFS_VOLMODE_DEFAULT, PROP_INHERIT,
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
"default | full | geom | dev | none", "VOLMODE", volmode_table);
/* inherit index (boolean) properties */
zprop_register_index(ZFS_PROP_ATIME, "atime", 1, PROP_INHERIT,
ZFS_TYPE_FILESYSTEM, "on | off", "ATIME", boolean_table);
zprop_register_index(ZFS_PROP_RELATIME, "relatime", 0, PROP_INHERIT,
ZFS_TYPE_FILESYSTEM, "on | off", "RELATIME", boolean_table);
zprop_register_index(ZFS_PROP_DEVICES, "devices", 1, PROP_INHERIT,
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "DEVICES",
boolean_table);
zprop_register_index(ZFS_PROP_EXEC, "exec", 1, PROP_INHERIT,
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "EXEC",
boolean_table);
zprop_register_index(ZFS_PROP_SETUID, "setuid", 1, PROP_INHERIT,
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "SETUID",
boolean_table);
zprop_register_index(ZFS_PROP_READONLY, "readonly", 0, PROP_INHERIT,
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "on | off", "RDONLY",
boolean_table);
zprop_register_index(ZFS_PROP_ZONED, "zoned", 0, PROP_INHERIT,
ZFS_TYPE_FILESYSTEM, "on | off", "ZONED", boolean_table);
zprop_register_index(ZFS_PROP_VSCAN, "vscan", 0, PROP_INHERIT,
ZFS_TYPE_FILESYSTEM, "on | off", "VSCAN", boolean_table);
zprop_register_index(ZFS_PROP_NBMAND, "nbmand", 0, PROP_INHERIT,
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "NBMAND",
boolean_table);
zprop_register_index(ZFS_PROP_OVERLAY, "overlay", 0, PROP_INHERIT,
ZFS_TYPE_FILESYSTEM, "on | off", "OVERLAY", boolean_table);
/* default index properties */
zprop_register_index(ZFS_PROP_VERSION, "version", 0, PROP_DEFAULT,
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
"1 | 2 | 3 | 4 | 5 | current", "VERSION", version_table);
zprop_register_index(ZFS_PROP_CANMOUNT, "canmount", ZFS_CANMOUNT_ON,
PROP_DEFAULT, ZFS_TYPE_FILESYSTEM, "on | off | noauto",
"CANMOUNT", canmount_table);
/* readonly index properties */
zprop_register_index(ZFS_PROP_MOUNTED, "mounted", 0, PROP_READONLY,
ZFS_TYPE_FILESYSTEM, "yes | no", "MOUNTED", boolean_table);
zprop_register_index(ZFS_PROP_DEFER_DESTROY, "defer_destroy", 0,
PROP_READONLY, ZFS_TYPE_SNAPSHOT, "yes | no", "DEFER_DESTROY",
boolean_table);
zprop_register_index(ZFS_PROP_KEYSTATUS, "keystatus",
ZFS_KEYSTATUS_NONE, PROP_READONLY, ZFS_TYPE_DATASET,
"none | unavailable | available",
"KEYSTATUS", keystatus_table);
/* set once index properties */
zprop_register_index(ZFS_PROP_NORMALIZE, "normalization", 0,
PROP_ONETIME, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
"none | formC | formD | formKC | formKD", "NORMALIZATION",
normalize_table);
zprop_register_index(ZFS_PROP_CASE, "casesensitivity",
ZFS_CASE_SENSITIVE, PROP_ONETIME, ZFS_TYPE_FILESYSTEM |
ZFS_TYPE_SNAPSHOT,
"sensitive | insensitive | mixed", "CASE", case_table);
zprop_register_index(ZFS_PROP_KEYFORMAT, "keyformat",
ZFS_KEYFORMAT_NONE, PROP_ONETIME_DEFAULT,
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
"none | raw | hex | passphrase", "KEYFORMAT", keyformat_table);
zprop_register_index(ZFS_PROP_ENCRYPTION, "encryption",
ZIO_CRYPT_DEFAULT, PROP_ONETIME, ZFS_TYPE_DATASET,
"on | off | aes-128-ccm | aes-192-ccm | aes-256-ccm | "
"aes-128-gcm | aes-192-gcm | aes-256-gcm", "ENCRYPTION",
crypto_table);
/* set once index (boolean) properties */
zprop_register_index(ZFS_PROP_UTF8ONLY, "utf8only", 0, PROP_ONETIME,
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
"on | off", "UTF8ONLY", boolean_table);
/* string properties */
zprop_register_string(ZFS_PROP_ORIGIN, "origin", NULL, PROP_READONLY,
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<snapshot>", "ORIGIN");
zprop_register_string(ZFS_PROP_CLONES, "clones", NULL, PROP_READONLY,
ZFS_TYPE_SNAPSHOT, "<dataset>[,...]", "CLONES");
zprop_register_string(ZFS_PROP_MOUNTPOINT, "mountpoint", "/",
PROP_INHERIT, ZFS_TYPE_FILESYSTEM, "<path> | legacy | none",
"MOUNTPOINT");
zprop_register_string(ZFS_PROP_SHARENFS, "sharenfs", "off",
PROP_INHERIT, ZFS_TYPE_FILESYSTEM, "on | off | share(1M) options",
"SHARENFS");
zprop_register_string(ZFS_PROP_TYPE, "type", NULL, PROP_READONLY,
ZFS_TYPE_DATASET | ZFS_TYPE_BOOKMARK,
"filesystem | volume | snapshot | bookmark", "TYPE");
zprop_register_string(ZFS_PROP_SHARESMB, "sharesmb", "off",
PROP_INHERIT, ZFS_TYPE_FILESYSTEM,
"on | off | sharemgr(1M) options", "SHARESMB");
zprop_register_string(ZFS_PROP_MLSLABEL, "mlslabel",
ZFS_MLSLABEL_DEFAULT, PROP_INHERIT, ZFS_TYPE_DATASET,
"<sensitivity label>", "MLSLABEL");
zprop_register_string(ZFS_PROP_SELINUX_CONTEXT, "context",
"none", PROP_DEFAULT, ZFS_TYPE_DATASET, "<selinux context>",
"CONTEXT");
zprop_register_string(ZFS_PROP_SELINUX_FSCONTEXT, "fscontext",
"none", PROP_DEFAULT, ZFS_TYPE_DATASET, "<selinux fscontext>",
"FSCONTEXT");
zprop_register_string(ZFS_PROP_SELINUX_DEFCONTEXT, "defcontext",
"none", PROP_DEFAULT, ZFS_TYPE_DATASET, "<selinux defcontext>",
"DEFCONTEXT");
zprop_register_string(ZFS_PROP_SELINUX_ROOTCONTEXT, "rootcontext",
"none", PROP_DEFAULT, ZFS_TYPE_DATASET, "<selinux rootcontext>",
"ROOTCONTEXT");
zprop_register_string(ZFS_PROP_RECEIVE_RESUME_TOKEN,
"receive_resume_token",
NULL, PROP_READONLY, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
"<string token>", "RESUMETOK");
zprop_register_string(ZFS_PROP_ENCRYPTION_ROOT, "encryptionroot", NULL,
PROP_READONLY, ZFS_TYPE_DATASET, "<filesystem | volume>",
"ENCROOT");
zprop_register_string(ZFS_PROP_KEYLOCATION, "keylocation",
"none", PROP_DEFAULT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
"prompt | <file URI>", "KEYLOCATION");
/* readonly number properties */
zprop_register_number(ZFS_PROP_USED, "used", 0, PROP_READONLY,
ZFS_TYPE_DATASET, "<size>", "USED");
zprop_register_number(ZFS_PROP_AVAILABLE, "available", 0, PROP_READONLY,
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>", "AVAIL");
zprop_register_number(ZFS_PROP_REFERENCED, "referenced", 0,
PROP_READONLY, ZFS_TYPE_DATASET, "<size>", "REFER");
zprop_register_number(ZFS_PROP_COMPRESSRATIO, "compressratio", 0,
PROP_READONLY, ZFS_TYPE_DATASET,
"<1.00x or higher if compressed>", "RATIO");
zprop_register_number(ZFS_PROP_REFRATIO, "refcompressratio", 0,
PROP_READONLY, ZFS_TYPE_DATASET,
"<1.00x or higher if compressed>", "REFRATIO");
zprop_register_number(ZFS_PROP_VOLBLOCKSIZE, "volblocksize",
ZVOL_DEFAULT_BLOCKSIZE, PROP_ONETIME,
ZFS_TYPE_VOLUME, "512 to 128k, power of 2", "VOLBLOCK");
zprop_register_number(ZFS_PROP_USEDSNAP, "usedbysnapshots", 0,
PROP_READONLY, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>",
"USEDSNAP");
zprop_register_number(ZFS_PROP_USEDDS, "usedbydataset", 0,
PROP_READONLY, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>",
"USEDDS");
zprop_register_number(ZFS_PROP_USEDCHILD, "usedbychildren", 0,
PROP_READONLY, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>",
"USEDCHILD");
zprop_register_number(ZFS_PROP_USEDREFRESERV, "usedbyrefreservation", 0,
PROP_READONLY,
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>", "USEDREFRESERV");
zprop_register_number(ZFS_PROP_USERREFS, "userrefs", 0, PROP_READONLY,
ZFS_TYPE_SNAPSHOT, "<count>", "USERREFS");
zprop_register_number(ZFS_PROP_WRITTEN, "written", 0, PROP_READONLY,
ZFS_TYPE_DATASET, "<size>", "WRITTEN");
zprop_register_number(ZFS_PROP_LOGICALUSED, "logicalused", 0,
PROP_READONLY, ZFS_TYPE_DATASET, "<size>", "LUSED");
zprop_register_number(ZFS_PROP_LOGICALREFERENCED, "logicalreferenced",
0, PROP_READONLY, ZFS_TYPE_DATASET, "<size>", "LREFER");
zprop_register_number(ZFS_PROP_FILESYSTEM_COUNT, "filesystem_count",
UINT64_MAX, PROP_READONLY, ZFS_TYPE_FILESYSTEM,
"<count>", "FSCOUNT");
zprop_register_number(ZFS_PROP_SNAPSHOT_COUNT, "snapshot_count",
UINT64_MAX, PROP_READONLY, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
"<count>", "SSCOUNT");
zprop_register_number(ZFS_PROP_GUID, "guid", 0, PROP_READONLY,
ZFS_TYPE_DATASET | ZFS_TYPE_BOOKMARK, "<uint64>", "GUID");
zprop_register_number(ZFS_PROP_CREATETXG, "createtxg", 0, PROP_READONLY,
ZFS_TYPE_DATASET | ZFS_TYPE_BOOKMARK, "<uint64>", "CREATETXG");
zprop_register_number(ZFS_PROP_PBKDF2_ITERS, "pbkdf2iters",
0, PROP_ONETIME_DEFAULT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
"<iters>", "PBKDF2ITERS");
/* default number properties */
zprop_register_number(ZFS_PROP_QUOTA, "quota", 0, PROP_DEFAULT,
ZFS_TYPE_FILESYSTEM, "<size> | none", "QUOTA");
zprop_register_number(ZFS_PROP_RESERVATION, "reservation", 0,
PROP_DEFAULT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
"<size> | none", "RESERV");
zprop_register_number(ZFS_PROP_VOLSIZE, "volsize", 0, PROP_DEFAULT,
ZFS_TYPE_SNAPSHOT | ZFS_TYPE_VOLUME, "<size>", "VOLSIZE");
zprop_register_number(ZFS_PROP_REFQUOTA, "refquota", 0, PROP_DEFAULT,
ZFS_TYPE_FILESYSTEM, "<size> | none", "REFQUOTA");
zprop_register_number(ZFS_PROP_REFRESERVATION, "refreservation", 0,
PROP_DEFAULT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
"<size> | none", "REFRESERV");
zprop_register_number(ZFS_PROP_FILESYSTEM_LIMIT, "filesystem_limit",
UINT64_MAX, PROP_DEFAULT, ZFS_TYPE_FILESYSTEM,
"<count> | none", "FSLIMIT");
zprop_register_number(ZFS_PROP_SNAPSHOT_LIMIT, "snapshot_limit",
UINT64_MAX, PROP_DEFAULT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
"<count> | none", "SSLIMIT");
/* inherit number properties */
zprop_register_number(ZFS_PROP_RECORDSIZE, "recordsize",
SPA_OLD_MAXBLOCKSIZE, PROP_INHERIT,
ZFS_TYPE_FILESYSTEM, "512 to 1M, power of 2", "RECSIZE");
/* hidden properties */
zprop_register_hidden(ZFS_PROP_NUMCLONES, "numclones", PROP_TYPE_NUMBER,
PROP_READONLY, ZFS_TYPE_SNAPSHOT, "NUMCLONES");
zprop_register_hidden(ZFS_PROP_NAME, "name", PROP_TYPE_STRING,
PROP_READONLY, ZFS_TYPE_DATASET | ZFS_TYPE_BOOKMARK, "NAME");
zprop_register_hidden(ZFS_PROP_ISCSIOPTIONS, "iscsioptions",
PROP_TYPE_STRING, PROP_INHERIT, ZFS_TYPE_VOLUME, "ISCSIOPTIONS");
zprop_register_hidden(ZFS_PROP_STMF_SHAREINFO, "stmf_sbd_lu",
PROP_TYPE_STRING, PROP_INHERIT, ZFS_TYPE_VOLUME,
"STMF_SBD_LU");
zprop_register_hidden(ZFS_PROP_USERACCOUNTING, "useraccounting",
PROP_TYPE_NUMBER, PROP_READONLY, ZFS_TYPE_DATASET,
"USERACCOUNTING");
zprop_register_hidden(ZFS_PROP_UNIQUE, "unique", PROP_TYPE_NUMBER,
PROP_READONLY, ZFS_TYPE_DATASET, "UNIQUE");
zprop_register_hidden(ZFS_PROP_OBJSETID, "objsetid", PROP_TYPE_NUMBER,
PROP_READONLY, ZFS_TYPE_DATASET, "OBJSETID");
zprop_register_hidden(ZFS_PROP_INCONSISTENT, "inconsistent",
PROP_TYPE_NUMBER, PROP_READONLY, ZFS_TYPE_DATASET, "INCONSISTENT");
zprop_register_hidden(ZFS_PROP_PREV_SNAP, "prevsnap", PROP_TYPE_STRING,
PROP_READONLY, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "PREVSNAP");
zprop_register_hidden(ZFS_PROP_PBKDF2_SALT, "pbkdf2salt",
PROP_TYPE_NUMBER, PROP_ONETIME_DEFAULT,
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "PBKDF2SALT");
zprop_register_hidden(ZFS_PROP_KEY_GUID, "keyguid", PROP_TYPE_NUMBER,
PROP_READONLY, ZFS_TYPE_DATASET, "KEYGUID");
/*
* Property to be removed once libbe is integrated
*/
zprop_register_hidden(ZFS_PROP_PRIVATE, "priv_prop",
PROP_TYPE_NUMBER, PROP_READONLY, ZFS_TYPE_FILESYSTEM,
"PRIV_PROP");
/* oddball properties */
zprop_register_impl(ZFS_PROP_CREATION, "creation", PROP_TYPE_NUMBER, 0,
NULL, PROP_READONLY, ZFS_TYPE_DATASET | ZFS_TYPE_BOOKMARK,
"<date>", "CREATION", B_FALSE, B_TRUE, NULL);
}
boolean_t
zfs_prop_delegatable(zfs_prop_t prop)
{
zprop_desc_t *pd = &zfs_prop_table[prop];
/* The mlslabel property is never delegatable. */
if (prop == ZFS_PROP_MLSLABEL)
return (B_FALSE);
return (pd->pd_attr != PROP_READONLY);
}
/*
* Given a zfs dataset property name, returns the corresponding property ID.
*/
zfs_prop_t
zfs_name_to_prop(const char *propname)
{
return (zprop_name_to_prop(propname, ZFS_TYPE_DATASET));
}
/*
* For user property names, we allow all lowercase alphanumeric characters, plus
* a few useful punctuation characters.
*/
static int
valid_char(char c)
{
return ((c >= 'a' && c <= 'z') ||
(c >= '0' && c <= '9') ||
c == '-' || c == '_' || c == '.' || c == ':');
}
/*
* Returns true if this is a valid user-defined property (one with a ':').
*/
boolean_t
zfs_prop_user(const char *name)
{
int i;
char c;
boolean_t foundsep = B_FALSE;
for (i = 0; i < strlen(name); i++) {
c = name[i];
if (!valid_char(c))
return (B_FALSE);
if (c == ':')
foundsep = B_TRUE;
}
if (!foundsep)
return (B_FALSE);
return (B_TRUE);
}
/*
* Returns true if this is a valid userspace-type property (one with a '@').
* Note that after the @, any character is valid (eg, another @, for SID
* user@domain).
*/
boolean_t
zfs_prop_userquota(const char *name)
{
zfs_userquota_prop_t prop;
for (prop = 0; prop < ZFS_NUM_USERQUOTA_PROPS; prop++) {
if (strncmp(name, zfs_userquota_prop_prefixes[prop],
strlen(zfs_userquota_prop_prefixes[prop])) == 0) {
return (B_TRUE);
}
}
return (B_FALSE);
}
/*
* Returns true if this is a valid written@ property.
* Note that after the @, any character is valid (eg, another @, for
* written@pool/fs@origin).
*/
boolean_t
zfs_prop_written(const char *name)
{
static const char *prefix = "written@";
return (strncmp(name, prefix, strlen(prefix)) == 0);
}
/*
* Tables of index types, plus functions to convert between the user view
* (strings) and internal representation (uint64_t).
*/
int
zfs_prop_string_to_index(zfs_prop_t prop, const char *string, uint64_t *index)
{
return (zprop_string_to_index(prop, string, index, ZFS_TYPE_DATASET));
}
int
zfs_prop_index_to_string(zfs_prop_t prop, uint64_t index, const char **string)
{
return (zprop_index_to_string(prop, index, string, ZFS_TYPE_DATASET));
}
uint64_t
zfs_prop_random_value(zfs_prop_t prop, uint64_t seed)
{
return (zprop_random_value(prop, seed, ZFS_TYPE_DATASET));
}
/*
* Returns TRUE if the property applies to any of the given dataset types.
*/
boolean_t
zfs_prop_valid_for_type(int prop, zfs_type_t types, boolean_t headcheck)
{
return (zprop_valid_for_type(prop, types, headcheck));
}
zprop_type_t
zfs_prop_get_type(zfs_prop_t prop)
{
return (zfs_prop_table[prop].pd_proptype);
}
/*
* Returns TRUE if the property is readonly.
*/
boolean_t
zfs_prop_readonly(zfs_prop_t prop)
{
return (zfs_prop_table[prop].pd_attr == PROP_READONLY ||
zfs_prop_table[prop].pd_attr == PROP_ONETIME ||
zfs_prop_table[prop].pd_attr == PROP_ONETIME_DEFAULT);
}
/*
* Returns TRUE if the property is only allowed to be set once.
*/
boolean_t
zfs_prop_setonce(zfs_prop_t prop)
{
return (zfs_prop_table[prop].pd_attr == PROP_ONETIME ||
zfs_prop_table[prop].pd_attr == PROP_ONETIME_DEFAULT);
}
const char *
zfs_prop_default_string(zfs_prop_t prop)
{
return (zfs_prop_table[prop].pd_strdefault);
}
uint64_t
zfs_prop_default_numeric(zfs_prop_t prop)
{
return (zfs_prop_table[prop].pd_numdefault);
}
/*
* Given a dataset property ID, returns the corresponding name.
* Assuming the zfs dataset property ID is valid.
*/
const char *
zfs_prop_to_name(zfs_prop_t prop)
{
return (zfs_prop_table[prop].pd_name);
}
/*
* Returns TRUE if the property is inheritable.
*/
boolean_t
zfs_prop_inheritable(zfs_prop_t prop)
{
return (zfs_prop_table[prop].pd_attr == PROP_INHERIT ||
zfs_prop_table[prop].pd_attr == PROP_ONETIME);
}
/*
* Returns TRUE if property is one of the encryption properties that requires
* a loaded encryption key to modify.
*/
boolean_t
zfs_prop_encryption_key_param(zfs_prop_t prop)
{
/*
* keylocation does not count as an encryption property. It can be
* changed at will without needing the master keys.
*/
return (prop == ZFS_PROP_PBKDF2_SALT || prop == ZFS_PROP_PBKDF2_ITERS ||
prop == ZFS_PROP_KEYFORMAT);
}
/*
* Helper function used by both kernelspace and userspace to check the
* keylocation property. If encrypted is set, the keylocation must be valid
* for an encrypted dataset.
*/
boolean_t
zfs_prop_valid_keylocation(const char *str, boolean_t encrypted)
{
if (strcmp("none", str) == 0)
return (!encrypted);
else if (strcmp("prompt", str) == 0)
return (B_TRUE);
else if (strlen(str) > 8 && strncmp("file:///", str, 8) == 0)
return (B_TRUE);
return (B_FALSE);
}
#ifndef _KERNEL
/*
* Returns a string describing the set of acceptable values for the given
* zfs property, or NULL if it cannot be set.
*/
const char *
zfs_prop_values(zfs_prop_t prop)
{
return (zfs_prop_table[prop].pd_values);
}
/*
* Returns TRUE if this property is a string type. Note that index types
* (compression, checksum) are treated as strings in userland, even though they
* are stored numerically on disk.
*/
int
zfs_prop_is_string(zfs_prop_t prop)
{
return (zfs_prop_table[prop].pd_proptype == PROP_TYPE_STRING ||
zfs_prop_table[prop].pd_proptype == PROP_TYPE_INDEX);
}
/*
* Returns the column header for the given property. Used only in
* 'zfs list -o', but centralized here with the other property information.
*/
const char *
zfs_prop_column_name(zfs_prop_t prop)
{
return (zfs_prop_table[prop].pd_colname);
}
/*
* Returns whether the given property should be displayed right-justified for
* 'zfs list'.
*/
boolean_t
zfs_prop_align_right(zfs_prop_t prop)
{
return (zfs_prop_table[prop].pd_rightalign);
}
#endif
#if defined(_KERNEL) && defined(HAVE_SPL)
static int __init
zcommon_init(void)
{
fletcher_4_init();
return (0);
}
static void __exit
zcommon_fini(void)
{
fletcher_4_fini();
}
module_init(zcommon_init);
module_exit(zcommon_fini);
MODULE_DESCRIPTION("Generic ZFS support");
MODULE_AUTHOR(ZFS_META_AUTHOR);
MODULE_LICENSE(ZFS_META_LICENSE);
MODULE_VERSION(ZFS_META_VERSION "-" ZFS_META_RELEASE);
/* zfs dataset property functions */
EXPORT_SYMBOL(zfs_userquota_prop_prefixes);
EXPORT_SYMBOL(zfs_prop_init);
EXPORT_SYMBOL(zfs_prop_get_type);
EXPORT_SYMBOL(zfs_prop_get_table);
EXPORT_SYMBOL(zfs_prop_delegatable);
/* Dataset property functions shared between libzfs and kernel. */
EXPORT_SYMBOL(zfs_prop_default_string);
EXPORT_SYMBOL(zfs_prop_default_numeric);
EXPORT_SYMBOL(zfs_prop_readonly);
EXPORT_SYMBOL(zfs_prop_inheritable);
EXPORT_SYMBOL(zfs_prop_encryption_key_param);
EXPORT_SYMBOL(zfs_prop_valid_keylocation);
EXPORT_SYMBOL(zfs_prop_setonce);
EXPORT_SYMBOL(zfs_prop_to_name);
EXPORT_SYMBOL(zfs_name_to_prop);
EXPORT_SYMBOL(zfs_prop_user);
EXPORT_SYMBOL(zfs_prop_userquota);
EXPORT_SYMBOL(zfs_prop_index_to_string);
EXPORT_SYMBOL(zfs_prop_string_to_index);
EXPORT_SYMBOL(zfs_prop_valid_for_type);
#endif
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