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implemnt backup ownership, improve datastore access permissions

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This commit is contained in:
Dietmar Maurer 2020-04-28 10:11:15 +02:00
parent 21690bfaef
commit 54552dda59
5 changed files with 235 additions and 54 deletions
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165
src/api2/admin/datastore.rs
View File

@ -10,7 +10,7 @@ use serde_json::{json, Value};
use proxmox::api::{
api, ApiResponseFuture, ApiHandler, ApiMethod, Router,
RpcEnvironment, RpcEnvironmentType, Permission};
RpcEnvironment, RpcEnvironmentType, Permission, UserInformation};
use proxmox::api::router::SubdirMap;
use proxmox::api::schema::*;
use proxmox::tools::fs::{file_get_contents, replace_file, CreateOptions};
@ -20,15 +20,26 @@ use proxmox::{http_err, identity, list_subdirs_api_method, sortable};
use crate::api2::types::*;
use crate::backup::*;
use crate::config::datastore;
use crate::config::cached_user_info::CachedUserInfo;
use crate::server::WorkerTask;
use crate::tools;
use crate::config::acl::{
PRIV_DATASTORE_AUDIT,
PRIV_DATASTORE_MODIFY,
PRIV_DATASTORE_READ,
PRIV_DATASTORE_PRUNE,
PRIV_DATASTORE_CREATE_BACKUP,
PRIV_DATASTORE_BACKUP,
};
fn check_backup_owner(store: &DataStore, group: &BackupGroup, userid: &str) -> Result<(), Error> {
let owner = store.get_owner(group)?;
if &owner != userid {
bail!("backup owner check failed ({} != {})", userid, owner);
}
Ok(())
}
fn read_backup_index(store: &DataStore, backup_dir: &BackupDir) -> Result<Vec<BackupContent>, Error> {
let mut path = store.base_path();
@ -86,14 +97,22 @@ fn group_backups(backup_list: Vec<BackupInfo>) -> HashMap<String, Vec<BackupInfo
}
},
access: {
permission: &Permission::Privilege(&["datastore", "{store}"], PRIV_DATASTORE_AUDIT, false),
permission: &Permission::Privilege(
&["datastore", "{store}"],
PRIV_DATASTORE_AUDIT | PRIV_DATASTORE_BACKUP,
true),
},
)]
/// List backup groups.
fn list_groups(
store: String,
rpcenv: &mut dyn RpcEnvironment,
) -> Result<Vec<GroupListItem>, Error> {
let username = rpcenv.get_user().unwrap();
let user_info = CachedUserInfo::new()?;
let user_privs = user_info.lookup_privs(&username, &["datastore", &store]);
let datastore = DataStore::lookup_datastore(&store)?;
let backup_list = BackupInfo::list_backups(&datastore.base_path())?;
@ -107,8 +126,15 @@ fn list_groups(
BackupInfo::sort_list(&mut list, false);
let info = &list[0];
let group = info.backup_dir.group();
let list_all = (user_privs & PRIV_DATASTORE_AUDIT) != 0;
if !list_all {
let owner = datastore.get_owner(group)?;
if owner != username { continue; }
}
let result_item = GroupListItem {
backup_type: group.backup_type().to_string(),
backup_id: group.backup_id().to_string(),
@ -147,7 +173,10 @@ fn list_groups(
}
},
access: {
permission: &Permission::Privilege(&["datastore", "{store}"], PRIV_DATASTORE_AUDIT, false),
permission: &Permission::Privilege(
&["datastore", "{store}"],
PRIV_DATASTORE_AUDIT | PRIV_DATASTORE_READ | PRIV_DATASTORE_BACKUP,
true),
},
)]
/// List snapshot files.
@ -157,12 +186,20 @@ pub fn list_snapshot_files(
backup_id: String,
backup_time: i64,
_info: &ApiMethod,
_rpcenv: &mut dyn RpcEnvironment,
rpcenv: &mut dyn RpcEnvironment,
) -> Result<Vec<BackupContent>, Error> {
let username = rpcenv.get_user().unwrap();
let user_info = CachedUserInfo::new()?;
let user_privs = user_info.lookup_privs(&username, &["datastore", &store]);
let datastore = DataStore::lookup_datastore(&store)?;
let snapshot = BackupDir::new(backup_type, backup_id, backup_time);
let allowed = (user_privs & (PRIV_DATASTORE_AUDIT | PRIV_DATASTORE_READ)) != 0;
if !allowed { check_backup_owner(&datastore, snapshot.group(), &username)?; }
let mut files = read_backup_index(&datastore, &snapshot)?;
let info = BackupInfo::new(&datastore.base_path(), snapshot)?;
@ -198,7 +235,10 @@ pub fn list_snapshot_files(
},
},
access: {
permission: &Permission::Privilege(&["datastore", "{store}"], PRIV_DATASTORE_PRUNE, false),
permission: &Permission::Privilege(
&["datastore", "{store}"],
PRIV_DATASTORE_MODIFY| PRIV_DATASTORE_PRUNE,
true),
},
)]
/// Delete backup snapshot.
@ -208,13 +248,20 @@ fn delete_snapshot(
backup_id: String,
backup_time: i64,
_info: &ApiMethod,
_rpcenv: &mut dyn RpcEnvironment,
rpcenv: &mut dyn RpcEnvironment,
) -> Result<Value, Error> {
let username = rpcenv.get_user().unwrap();
let user_info = CachedUserInfo::new()?;
let user_privs = user_info.lookup_privs(&username, &["datastore", &store]);
let snapshot = BackupDir::new(backup_type, backup_id, backup_time);
let datastore = DataStore::lookup_datastore(&store)?;
let allowed = (user_privs & PRIV_DATASTORE_MODIFY) != 0;
if !allowed { check_backup_owner(&datastore, snapshot.group(), &username)?; }
datastore.remove_backup_dir(&snapshot)?;
Ok(Value::Null)
@ -244,21 +291,27 @@ fn delete_snapshot(
}
},
access: {
permission: &Permission::Privilege(&["datastore", "{store}"], PRIV_DATASTORE_AUDIT, false),
permission: &Permission::Privilege(
&["datastore", "{store}"],
PRIV_DATASTORE_AUDIT | PRIV_DATASTORE_BACKUP,
true),
},
)]
/// List backup snapshots.
pub fn list_snapshots (
param: Value,
store: String,
backup_type: Option<String>,
backup_id: Option<String>,
_param: Value,
_info: &ApiMethod,
_rpcenv: &mut dyn RpcEnvironment,
rpcenv: &mut dyn RpcEnvironment,
) -> Result<Vec<SnapshotListItem>, Error> {
let store = tools::required_string_param(&param, "store")?;
let backup_type = param["backup-type"].as_str();
let backup_id = param["backup-id"].as_str();
let username = rpcenv.get_user().unwrap();
let user_info = CachedUserInfo::new()?;
let user_privs = user_info.lookup_privs(&username, &["datastore", &store]);
let datastore = DataStore::lookup_datastore(store)?;
let datastore = DataStore::lookup_datastore(&store)?;
let base_path = datastore.base_path();
@ -268,13 +321,19 @@ pub fn list_snapshots (
for info in backup_list {
let group = info.backup_dir.group();
if let Some(backup_type) = backup_type {
if let Some(ref backup_type) = backup_type {
if backup_type != group.backup_type() { continue; }
}
if let Some(backup_id) = backup_id {
if let Some(ref backup_id) = backup_id {
if backup_id != group.backup_id() { continue; }
}
let list_all = (user_privs & PRIV_DATASTORE_AUDIT) != 0;
if !list_all {
let owner = datastore.get_owner(group)?;
if owner != username { continue; }
}
let mut result_item = SnapshotListItem {
backup_type: group.backup_type().to_string(),
backup_id: group.backup_id().to_string(),
@ -311,7 +370,7 @@ pub fn list_snapshots (
type: StorageStatus,
},
access: {
permission: &Permission::Privilege(&["datastore", "{store}"], PRIV_DATASTORE_AUDIT, false),
permission: &Permission::Privilege(&["datastore", "{store}"], PRIV_DATASTORE_AUDIT | PRIV_DATASTORE_BACKUP, true),
},
)]
/// Get datastore status.
@ -411,24 +470,34 @@ const API_METHOD_PRUNE: ApiMethod = ApiMethod::new(
("store", false, &DATASTORE_SCHEMA),
])
)
).access(None, &Permission::Privilege(&["datastore", "{store}"], PRIV_DATASTORE_PRUNE, false));
).access(None, &Permission::Privilege(
&["datastore", "{store}"],
PRIV_DATASTORE_MODIFY | PRIV_DATASTORE_PRUNE,
true)
);
fn prune(
param: Value,
_info: &ApiMethod,
_rpcenv: &mut dyn RpcEnvironment,
rpcenv: &mut dyn RpcEnvironment,
) -> Result<Value, Error> {
let store = param["store"].as_str().unwrap();
let store = tools::required_string_param(&param, "store")?;
let backup_type = tools::required_string_param(&param, "backup-type")?;
let backup_id = tools::required_string_param(&param, "backup-id")?;
let username = rpcenv.get_user().unwrap();
let user_info = CachedUserInfo::new()?;
let user_privs = user_info.lookup_privs(&username, &["datastore", &store]);
let dry_run = param["dry-run"].as_bool().unwrap_or(false);
let group = BackupGroup::new(backup_type, backup_id);
let datastore = DataStore::lookup_datastore(store)?;
let datastore = DataStore::lookup_datastore(&store)?;
let allowed = (user_privs & PRIV_DATASTORE_MODIFY) != 0;
if !allowed { check_backup_owner(&datastore, &group, &username)?; }
let prune_options = PruneOptions {
keep_last: param["keep-last"].as_u64(),
@ -535,7 +604,7 @@ fn prune(
schema: UPID_SCHEMA,
},
access: {
permission: &Permission::Privilege(&["datastore", "{store}"], PRIV_DATASTORE_PRUNE, false),
permission: &Permission::Privilege(&["datastore", "{store}"], PRIV_DATASTORE_MODIFY, false),
},
)]
/// Start garbage collection.
@ -592,19 +661,30 @@ pub fn garbage_collection_status(
#[api(
access: {
permission: &Permission::Privilege(&["datastore"], PRIV_DATASTORE_AUDIT, false),
permission: &Permission::Anybody,
},
)]
/// Datastore list
fn get_datastore_list(
_param: Value,
_info: &ApiMethod,
_rpcenv: &mut dyn RpcEnvironment,
rpcenv: &mut dyn RpcEnvironment,
) -> Result<Value, Error> {
let (config, _digest) = datastore::config()?;
Ok(config.convert_to_array("store", None, &[]))
let username = rpcenv.get_user().unwrap();
let user_info = CachedUserInfo::new()?;
let mut skip: Vec<&str> = Vec::new();
for (store, _) in &config.sections {
let user_privs = user_info.lookup_privs(&username, &["datastore", &store]);
let allowed = (user_privs & (PRIV_DATASTORE_AUDIT| PRIV_DATASTORE_BACKUP)) != 0;
if !allowed { skip.push(store); }
}
Ok(config.convert_to_array("store", None, &skip))
}
#[sortable]
@ -620,32 +700,42 @@ pub const API_METHOD_DOWNLOAD_FILE: ApiMethod = ApiMethod::new(
("file-name", false, &BACKUP_ARCHIVE_NAME_SCHEMA),
]),
)
).access(None, &Permission::Privilege(&["datastore", "{store}"], PRIV_DATASTORE_READ, false));
).access(None, &Permission::Privilege(
&["datastore", "{store}"],
PRIV_DATASTORE_READ | PRIV_DATASTORE_BACKUP,
true)
);
fn download_file(
_parts: Parts,
_req_body: Body,
param: Value,
_info: &ApiMethod,
_rpcenv: Box<dyn RpcEnvironment>,
rpcenv: Box<dyn RpcEnvironment>,
) -> ApiResponseFuture {
async move {
let store = tools::required_string_param(&param, "store")?;
let datastore = DataStore::lookup_datastore(store)?;
let username = rpcenv.get_user().unwrap();
let user_info = CachedUserInfo::new()?;
let user_privs = user_info.lookup_privs(&username, &["datastore", &store]);
let file_name = tools::required_string_param(&param, "file-name")?.to_owned();
let backup_type = tools::required_string_param(&param, "backup-type")?;
let backup_id = tools::required_string_param(&param, "backup-id")?;
let backup_time = tools::required_integer_param(&param, "backup-time")?;
let backup_dir = BackupDir::new(backup_type, backup_id, backup_time);
let allowed = (user_privs & PRIV_DATASTORE_READ) != 0;
if !allowed { check_backup_owner(&datastore, backup_dir.group(), &username)?; }
println!("Download {} from {} ({}/{}/{}/{})", file_name, store,
backup_type, backup_id, Local.timestamp(backup_time, 0), file_name);
let backup_dir = BackupDir::new(backup_type, backup_id, backup_time);
let mut path = datastore.base_path();
path.push(backup_dir.relative_path());
path.push(&file_name);
@ -671,7 +761,7 @@ fn download_file(
pub const API_METHOD_UPLOAD_BACKUP_LOG: ApiMethod = ApiMethod::new(
&ApiHandler::AsyncHttp(&upload_backup_log),
&ObjectSchema::new(
"Download single raw file from backup snapshot.",
"Upload the client backup log file into a backup snapshot ('client.log.blob').",
&sorted!([
("store", false, &DATASTORE_SCHEMA),
("backup-type", false, &BACKUP_TYPE_SCHEMA),
@ -679,19 +769,21 @@ pub const API_METHOD_UPLOAD_BACKUP_LOG: ApiMethod = ApiMethod::new(
("backup-time", false, &BACKUP_TIME_SCHEMA),
]),
)
).access(None, &Permission::Privilege(&["datastore", "{store}"], PRIV_DATASTORE_CREATE_BACKUP, false));
).access(
Some("Only the backup creator/owner is allowed to do this."),
&Permission::Privilege(&["datastore", "{store}"], PRIV_DATASTORE_BACKUP, false)
);
fn upload_backup_log(
_parts: Parts,
req_body: Body,
param: Value,
_info: &ApiMethod,
_rpcenv: Box<dyn RpcEnvironment>,
rpcenv: Box<dyn RpcEnvironment>,
) -> ApiResponseFuture {
async move {
let store = tools::required_string_param(&param, "store")?;
let datastore = DataStore::lookup_datastore(store)?;
let file_name = "client.log.blob";
@ -702,6 +794,9 @@ fn upload_backup_log(
let backup_dir = BackupDir::new(backup_type, backup_id, backup_time);
let username = rpcenv.get_user().unwrap();
check_backup_owner(&datastore, backup_dir.group(), &username)?;
let mut path = datastore.base_path();
path.push(backup_dir.relative_path());
path.push(&file_name);

14
src/api2/backup.rs
View File

@ -14,7 +14,7 @@ use crate::tools::{self, WrappedReaderStream};
use crate::server::{WorkerTask, H2Service};
use crate::backup::*;
use crate::api2::types::*;
use crate::config::acl::PRIV_DATASTORE_CREATE_BACKUP;
use crate::config::acl::PRIV_DATASTORE_BACKUP;
use crate::config::cached_user_info::CachedUserInfo;
mod environment;
@ -41,7 +41,7 @@ pub const API_METHOD_UPGRADE_BACKUP: ApiMethod = ApiMethod::new(
)
).access(
// Note: parameter 'store' is no uri parameter, so we need to test inside function body
Some("The user needs Datastore.CreateBackup privilege on /datastore/{store}."),
Some("The user needs Datastore.Backup privilege on /datastore/{store} and needs to own the backup group."),
&Permission::Anybody
);
@ -53,7 +53,7 @@ fn upgrade_to_backup_protocol(
rpcenv: Box<dyn RpcEnvironment>,
) -> ApiResponseFuture {
async move {
async move {
let debug = param["debug"].as_bool().unwrap_or(false);
let username = rpcenv.get_user().unwrap();
@ -61,7 +61,7 @@ fn upgrade_to_backup_protocol(
let store = tools::required_string_param(&param, "store")?.to_owned();
let user_info = CachedUserInfo::new()?;
user_info.check_privs(&username, &["datastore", &store], PRIV_DATASTORE_CREATE_BACKUP, false)?;
user_info.check_privs(&username, &["datastore", &store], PRIV_DATASTORE_BACKUP, false)?;
let datastore = DataStore::lookup_datastore(&store)?;
@ -88,6 +88,12 @@ fn upgrade_to_backup_protocol(
let env_type = rpcenv.env_type();
let backup_group = BackupGroup::new(backup_type, backup_id);
let owner = datastore.create_backup_group(&backup_group, &username)?;
// permission check
if owner != username { // only the owner is allowed to create additional snapshots
bail!("backup owner check failed ({} != {})", username, owner);
}
let last_backup = BackupInfo::last_backup(&datastore.base_path(), &backup_group).unwrap_or(None);
let backup_dir = BackupDir::new_with_group(backup_group, backup_time);

27
src/api2/pull.rs
View File

@ -16,7 +16,7 @@ use crate::backup::*;
use crate::client::*;
use crate::config::remote;
use crate::api2::types::*;
use crate::config::acl::{PRIV_DATASTORE_CREATE_BACKUP, PRIV_DATASTORE_READ};
use crate::config::acl::{PRIV_DATASTORE_BACKUP, PRIV_DATASTORE_READ};
use crate::config::cached_user_info::CachedUserInfo;
// fixme: implement filters
@ -312,6 +312,7 @@ pub async fn pull_store(
src_repo: &BackupRepository,
tgt_store: Arc<DataStore>,
delete: bool,
username: String,
) -> Result<(), Error> {
let path = format!("api2/json/admin/datastore/{}/groups", src_repo.store());
@ -332,15 +333,27 @@ pub async fn pull_store(
let mut errors = false;
let mut new_groups = std::collections::HashSet::new();
for item in list.iter() {
new_groups.insert(BackupGroup::new(&item.backup_type, &item.backup_id));
}
for item in list {
let group = BackupGroup::new(&item.backup_type, &item.backup_id);
let owner = tgt_store.create_backup_group(&group, &username)?;
// permission check
if owner != username { // only the owner is allowed to create additional snapshots
worker.log(format!("sync group {}/{} failed - owner check failed ({} != {})",
item.backup_type, item.backup_id, username, owner));
errors = true;
continue; // do not stop here, instead continue
}
if let Err(err) = pull_group(worker, client, src_repo, tgt_store.clone(), &group, delete).await {
worker.log(format!("sync group {}/{} failed - {}", item.backup_type, item.backup_id, err));
errors = true;
// do not stop here, instead continue
continue; // do not stop here, instead continue
}
new_groups.insert(group);
}
if delete {
@ -391,7 +404,9 @@ pub async fn pull_store(
},
access: {
// Note: used parameters are no uri parameters, so we need to test inside function body
description: "The user needs Datastore.CreateBackup privilege on '/datastore/{store}' and Datastore.Read on '/remote/{remote}/{remote-store}'.",
description: r###"The user needs Datastore.Backup privilege on '/datastore/{store}',
and needs to own the backup group. Datastore.Read is required on '/remote/{remote}/{remote-store}'.
"###,
permission: &Permission::Anybody,
},
)]
@ -408,7 +423,7 @@ async fn pull (
let user_info = CachedUserInfo::new()?;
let username = rpcenv.get_user().unwrap();
user_info.check_privs(&username, &["datastore", &store], PRIV_DATASTORE_CREATE_BACKUP, false)?;
user_info.check_privs(&username, &["datastore", &store], PRIV_DATASTORE_BACKUP, false)?;
user_info.check_privs(&username, &["remote", &remote, &remote_store], PRIV_DATASTORE_READ, false)?;
let delete = delete.unwrap_or(true);
@ -437,7 +452,7 @@ async fn pull (
// explicit create shared lock to prevent GC on newly created chunks
let _shared_store_lock = tgt_store.try_shared_chunk_store_lock()?;
pull_store(&worker, &client, &src_repo, tgt_store.clone(), delete).await?;
pull_store(&worker, &client, &src_repo, tgt_store.clone(), delete, username).await?;
worker.log(format!("sync datastore '{}' end", store));

72
src/backup/datastore.rs
View File

@ -1,5 +1,5 @@
use std::collections::{HashSet, HashMap};
use std::io;
use std::io::{self, Write};
use std::path::{Path, PathBuf};
use std::sync::{Arc, Mutex};
@ -236,18 +236,80 @@ impl DataStore {
}
}
pub fn create_backup_dir(&self, backup_dir: &BackupDir) -> Result<(PathBuf, bool), io::Error> {
/// Returns the backup owner.
///
/// The backup owner is the user who first created the backup group.
pub fn get_owner(&self, backup_group: &BackupGroup) -> Result<String, Error> {
let mut full_path = self.base_path();
full_path.push(backup_group.group_path());
full_path.push("owner");
let owner = proxmox::tools::fs::file_read_firstline(full_path)?;
Ok(owner.trim_end().to_string()) // remove trailing newline
}
/// Set the backup owner.
pub fn set_owner(&self, backup_group: &BackupGroup, userid: &str, force: bool) -> Result<(), Error> {
let mut path = self.base_path();
path.push(backup_group.group_path());
path.push("owner");
let mut open_options = std::fs::OpenOptions::new();
open_options.write(true);
open_options.truncate(true);
if force {
open_options.create(true);
} else {
open_options.create_new(true);
}
let mut file = open_options.open(&path)
.map_err(|err| format_err!("unable to create owner file {:?} - {}", path, err))?;
write!(file, "{}\n", userid)
.map_err(|err| format_err!("unable to write owner file {:?} - {}", path, err))?;
Ok(())
}
/// Create a backup group if it does not already exists.
///
/// And set the owner to 'userid'. If the group already exists, it returns the
/// current owner (instead of setting the owner).
pub fn create_backup_group(&self, backup_group: &BackupGroup, userid: &str) -> Result<String, Error> {
// create intermediate path first:
let mut full_path = self.base_path();
full_path.push(backup_dir.group().group_path());
let base_path = self.base_path();
let mut full_path = base_path.clone();
full_path.push(backup_group.backup_type());
std::fs::create_dir_all(&full_path)?;
full_path.push(backup_group.backup_id());
// create the last component now
match std::fs::create_dir(&full_path) {
Ok(_) => {
self.set_owner(backup_group, userid, false)?;
let owner = self.get_owner(backup_group)?; // just to be sure
Ok(owner)
}
Err(ref err) if err.kind() == io::ErrorKind::AlreadyExists => {
let owner = self.get_owner(backup_group)?; // just to be sure
Ok(owner)
}
Err(err) => bail!("unable to create backup group {:?} - {}", full_path, err),
}
}
/// Creates a new backup snapshot inside a BackupGroup
///
/// The BackupGroup directory needs to exist.
pub fn create_backup_dir(&self, backup_dir: &BackupDir) -> Result<(PathBuf, bool), io::Error> {
let relative_path = backup_dir.relative_path();
let mut full_path = self.base_path();
full_path.push(&relative_path);
// create the last component now
match std::fs::create_dir(&full_path) {
Ok(_) => Ok((relative_path, true)),
Err(ref e) if e.kind() == io::ErrorKind::AlreadyExists => Ok((relative_path, false)),

11
src/config/acl.rs
View File

@ -17,8 +17,11 @@ pub const PRIV_SYS_POWER_MANAGEMENT: u64 = 1 << 2;
pub const PRIV_DATASTORE_AUDIT: u64 = 1 << 3;
pub const PRIV_DATASTORE_MODIFY: u64 = 1 << 4;
pub const PRIV_DATASTORE_CREATE_BACKUP: u64 = 1 << 5;
pub const PRIV_DATASTORE_READ: u64 = 1 << 6;
pub const PRIV_DATASTORE_READ: u64 = 1 << 5;
/// Datastore.Backup also requires backup ownership
pub const PRIV_DATASTORE_BACKUP: u64 = 1 << 6;
/// Datastore.Prune also requires backup ownership
pub const PRIV_DATASTORE_PRUNE: u64 = 1 << 7;
pub const PRIV_PERMISSIONS_MODIFY: u64 = 1 << 8;
@ -33,12 +36,12 @@ PRIV_DATASTORE_AUDIT;
pub const ROLE_DATASTORE_ADMIN: u64 =
PRIV_DATASTORE_AUDIT |
PRIV_DATASTORE_MODIFY |
PRIV_DATASTORE_CREATE_BACKUP |
PRIV_DATASTORE_READ |
PRIV_DATASTORE_BACKUP |
PRIV_DATASTORE_PRUNE;
pub const ROLE_DATASTORE_USER: u64 =
PRIV_DATASTORE_CREATE_BACKUP;
PRIV_DATASTORE_BACKUP;
pub const ROLE_DATASTORE_AUDIT: u64 =
PRIV_DATASTORE_AUDIT;