Do not check that a node indeed belongs to the container, because the
synchronization will fail in this case anyway.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
Do not return backend type from the service for now, because memory
backend is expected to vanish.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
In case node is down or failing for some reason, we can expect `Dial` to
fail. In case we actively try to replicate and `Dial` always takes 2
seconds, replication-related channels quickly become full. That affects
latency of all other write operations.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
Before this commit the replication channel was quickly filled under
heavy load. This lead to the continuously increasing latency for all
write operations. Now it looks better.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
Also fix a bug with replicator using the multiaddress instead of
<host>:<port> format expected by gRPC library.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
Replace `ErrRangeOutOfBounds` error from `pkg/core/object` package with
`ObjectOutOfRange` from `apistatus` package. That error is returned by
storage node's server as NeoFS API statuses.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Do not calculate and do not write homomorphic hash for containers that were
configured to store objects without hash.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Do not use homomorphic hash in storage group for containers that have
`homomorphic_hashing_disabled` set to `true`.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
If the container ID is not nil and not equal to the container ID in the
request, consider bearer token invalid.
See also nspcc-dev/neofs-api#207.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
Allocate memory only if a node chosen as the forwarded request receiver
has responded with a successful status.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
After fixing version fields in forwarded requests, a node does not check
statuses since errors are not covered by direct call error checks.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Error checkers now support wrapped errors so there is no need to
explicitly unwrap errors in `Policer`.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Forwarded requests contained zero version in their meta header. It did not
allow responding with API statuses (`v0.0` version considered to be older
than `v2.11`) to the forwarding node and, therefore, did not allow analyzing
responses.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
`auditor` does not need to request SG: processor will fetch that info before
audit context initialization.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
That allows using `ClientCache` for storage group searching before task
context is initialized. Also, that makes it more general purpose.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
After recent changes in NeoFS SDK Go library session tokens aren't
embedded into `container.Container` and `eacl.Table` structures.
Group value, session token and signature in a structure for container
and eACL.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Cache object that are being processed. That prevents concurrent
object handling when there is a few number of objects and object handling
takes more time that the policer needs for starting that object handling one
more time.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
If placement contains two vectors with intersecting nodes it was possible to
send the object to the nodes twice.
Also optimizes requests: do not ask about storing the object twice from the
same node.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
The node does not support asynchronous object replication anymore, so it
does not need to have replicator worker, channel and `AddTask` function.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
In case we have lots of objects in a single container,
`GetContainerNodes` invoked indirectly by a policer can be seen in
pprof.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
Node shouldn't perform eACL verification during GET/HEAD request
processing until full object header is received. Otherwise, for some
eACL tables request may be falsely rejected.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Scenario:
* HEAD request of some object
* 1st eACL record allows op for objects with specific user attribute
* 2nd eACL record forbids op by object ID
* node doesn't store the requested object locally
With this scenario node shouldn't deny request.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
It is redundant to process object headers in responses w/o object field
since result will be the same.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Request processing should not be interrupted in case of local storage
failure since error case in normal for relay nodes.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
ACL service should not deny request on local storage failure since in
this case relay nodes won't be able to continue the operation.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
`log.With` is suitable during initialization, but in other places it induces
some overhead, even when branches with logging are not taken.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
Core changes:
* avoid package-colliding variable naming
* avoid using pointers to IDs where unnecessary
* avoid using `idSDK` import alias pattern
* use `EncodeToString` for protocol string calculation and `String` for
printing
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Helper function `client.IsErrObjectNotFound` doesn't support error
unwrapping, so we need to do it on caller side.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
`Policer` should pass list of selected candidates into `WithNodes`
method of `replicator.Task`. In previous implementation `processNodes`
method passed an opposite list: failed nodes and/or the local one.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Not all the NeoFS requests must contain OID in their bodies (or must NOT
contain them at all). Do not pass object address in helper functions, pass
CID and OID separately instead.
Also, fixed NPE in the ACL service: updated SDK library brought errors
when working with `Put` and `Search` requests without OID fields.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
In previous implementation `Policer` considered local object copy as
redundant on processing single placement vector.
Make `Policer` to call redundant copy callback after full placement
processing. Also fix 404 error parsing.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Parse all headers beforehand and reject invalid requests.
Another approach would be to remember the error and check
it after `CalculateAction`, which is a bit faster.
The rule of thumb here is "first validate, then use".
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
It is nice to have different paths for different components and also
check that the information returned is different for different shards.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
The service fetches tombstones from the network via object service, every
request is handled in the following order:
1. checks local LRU cache;
2. checks local storage engine;
3. tries to find object in the placement nodes.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
`Degraded` mode is set automatically after error counter is over the
threshold. `ReadOnly` mode can still be set by an administrator.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
Add `WithEncryption` option that passes ECDSA key to the persistent session
storage. It uses 32 bytes from marshalled ECDSA key in ASN.1 DER from in
AES-256 algorithm encryption in Galois/Counter Mode.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Move in-memory session storage to the separate directory of `storage`. It is
done for future support of different kind of session storages.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Return `apistatus.ObjectAccessDenied` error on access violation from ACL
service. Write reason in format of the errors from the previous
implementation. These errors are returned by storage node's server as
NeoFS API statuses.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Replace `core/container.ErrNotFound` error returned by `Source.Get`
interface method with `apistatus.ContainerNotFound` status error. This
error is returned by storage node's server as NeoFS API statuses.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Replace `ErrNotFound`/`ErrAlreadyRemoved` error from
`pkg/core/object` package with `ObjectNotFound`/`ObjectAlreadyRemoved`
one from `apistatus` package. These errors are returned by storage
node's server as NeoFS API statuses.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Return `SessionTokenExpired`/`SessionTokenNotFound` error from
`apistatus` package if private session token is expired/missing. These
errors are returned by storage node's server as NeoFS API statuses.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Make all epoch independent in reputation process. Do not reset any timers
related to reputation. Make it possible to finish iteration after the
unexpected `NewEpoch` event.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
In previous implementation `SignService` converted all `error` values to
`INTERNAL` server failure status. That was done for simplification only.
There is a need to transmit status errors as corresponding status
messages.
Make `SignService` to unwrap errors and convert them to status message
during writing to the response. Non-status errors are converted to
`INTERNAL` server failures. Status errors can also be wrapped in the
depths of the executable code, so `SignService` tries to unwrap them.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
After `putsvc.Service` started to support additional container broadcast
of the saved objects there is no more need to perform broadcast of
tombstone object in `deletesvc.Service`.
Make `putsvc.Service` to perform additional broadcast of `TOMBSTONE`
objects. Remove `broadcastTombstone` stage from `deletesvc.execCtx`,
from now it is encapsulated in `saveTombstone` stage. Remove no longer
needed `putsvc.PutInitPrm.WithTraverseOption` method.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
There are several cases when we need to spread the object around the
container after its primary placement (e.g. objects of type TOMBSTONE).
It'd be convenient to support this feature in `putsvc.Service`.
Add additional stage of container broadcast after the object is stored.
This stage is carried out no more than once and does not affect the
outcome of the main PUT operation.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Make all operations that related to `neofs-api-go` library be placed in `v2`
packages. They parse all v2-versioned structs info `neofs-sdk-go`
abstractions and pass them to the corresponding `acl`/`eacl` packages. `v2`
packages are the only packages that do import `neofs-api-go` library. `eacl`
and `acl` provide public functions that only accepts `sdk` structures.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Remove `Object` and `RawObject` types from `pkg/core/object` package.
Use `Object` type from NeoFS SDK Go library everywhere. Avoid using the
deprecated elements.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
- Update `neofs-sdk-go`:
v0.0.0-20211230072947-1fe37df88f80 => v0.0.0-20220113123743-7f3162110659
- Add client interface that duplicates SDK's client behaviour and new
`MultiAddressClient` interface that has method that iterates over wrapped
clients.
- Also start using simple client mode that does not require parsing statuses
outside the SDK library.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Reverse payload overtake triggers direct payload overtake that
sets status and error. We should not override that.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
It is much more convenient to skip source creation.
Also fix some bugs:
1. `cryptoSource.Int63()` now returns number in [0, 1<<63) as required
by `rand.Source` interface.
2. Replace `cryptoSource.Uint63()` with `cryptoSource.Uint64` to allow
generate uint64 numbers directly (see rand.Source64 docs).
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
In previous implementation `Search` method of transport splitter skipped
responses with empty ID list.
Replace while-loop with do-while one in `TransportSplitter.Search`
method implementation in order to send responses with empty result too.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Without sanity check, container service provides successful response,
even though such request will never be approved by Alphabet nodes.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
When application is being terminated, replicator routine
might be on the object picking phase. Storage is terminated
asynchronously, thus `Select()` may return corresponding
error. If we don't process `context.Done()` in this case,
then application freezes on shutdown.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Add `subnet` command which contains all subnet-related commands. Add
sub-commands:
* `create` for creation;
* `remove` for removal;
* `get` for reading;
* `admin` for admin management;
* `client` for client management.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Continues replication executed in separate pool of goroutines,
so there is no need in worker to handle replication tasks
asynchronously.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Upgrade NeoFS API Go library to version with status returns. Make all API
clients to pull out and return errors from failed statuses. Make signature
service to respond with status if client version supports it.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Add `MAINTENANCE` value to `NetmapStatus` enum in Control API. The status is
going to be used to toggle maintenance mode of the storage node.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
All objects in NeoFS must have owner ID. In previous implementation Object
Delete service handler set owner ID from request session token. If removal
was executed w/o a session, object with tombstone was prepared incorrectly.
In order to fix this node should set its own ID and become an owner of the
tombstone object.
Extend `NetworkInfo` interface required by Object.Delete handler with
`LocalNodeID` method which returns `owner.ID` of the local node. Implement
the method on `networkState` component of storage node application which is
updated on each node state change in NeoFS network map. Set owner returned
by `LocalNodeID` call as tombstone object's owner in Delete handler.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation node returns "access denied" on Object.Put with
object with unset owner. Although object owner must be set, its absence
should not be considered as access error. The same applies to sender key.
Check owner ID and public key emptiness only if sticky bit is set.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
The client needs of the Object service are limited and change not often.
Interface changes of the client library should not affect the operation of
various service packages, if they do not change their requirements for
the provided functionality. To localize the use of the base client and
facilitate further support, an auxiliary package is implemented that will
only be used by the Object service.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
There is no point to pass key storage in parameters because
it can be defined on the service level of application.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
`CommonPrm` structure has private key for remote operations.
It obtained in the beginning of request processing. However,
not every operation triggers remote calls. Therefore, key
might not be used. It is important to avoid early key fetching
because `TokenStore` now returns error if session token does not
exist. This is valid case when container nodes receive request with
session token (for ACL pass) and they should process request locally.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
This is invalid operation for storage nodes that receive part of split
object. While object is signed by session token, the message itself
should be signed by the node key.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Some of the pools are initialized during config initialization,
so it isn't possible currently to release them in one place.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
Make the implementation of network info source (Netmap V2 service
dependency) to read MillisecondsPerBlock sidechain parameter and NeoFS
network parameters depending on the client version.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
After storage engine started to limit number of PUT operations there is no
need to limited worker pool in Object Put service.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Session token can be present in both object header and
request meta header. They are the same during initial object
placement.
At the object replication, storage node puts object without
any session tokens attached to the request. If container's eACL
denies object.Put for USER role (use bearer to upload), then
replication might fail on objects with session tokens of the
signed by container owner. It is incorrect, so use session
token directly from request meta header.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
There is a need to check if public key in the RPC response matches the
public key of the related storage node declared in network map.
Define `ErrWrongPublicKey` error. Implement RPC response handler's
constructor `AssertKeyResponseCallback` which checks public key. Construct
handler and pass it to client's option `WithResponseInfoHandler`.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
There is a need to have the ability to expand the data needed for client
construction.
Replace `network.AddressGroup` parameter of client cache interfaces with
`client.NodeInfo`.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation Object PUT used single pool of workers for local
and remote ops, but these ops are heterogeneous.
Use remote/local pool for remote/local operations in PUT service. At first
the pools are configured with the same size.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation `distributedTarget` didn't check if next node is
local. This check was performed by the handlers (target initializer and
relay func).
Make `distributedTarget` to calculate node's locality. Pass locality flag to
the handlers.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Forwarding mechanism resends original request. During split object chain traversal,
storage node performs multiple `object.Head` requests on each child. If request
forwarding happens, then `object.Head` returns object ID of the original request.
This produces infinite assembly loop.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Make `errIncompletePut` to be a structure which wraps single client error.
Wrap error of the last client into `errIncompletePut` during placement
execution.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation Object service's handler returned const error in
case of failure (full or partial) of PUT operation. This did not even allow
us to roughly guess what the reason is. Not as a complete solution, but to
alleviate some cases where all nodes in a container return the same error,
it is suggested to return the error of the last server that responded.
Return latest server error from placement loop of `iteratePlacement` method
of `distributedTarget` type.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation sticky bit could disrupt access of container
nodes to replication. According to NeoFS specification sticky bit should not
affect the requests sent by nodes from SYSTEM group.
Add role check to `stickyBitCheck`.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Some software components regulate the way of working with placement arrays
when a local node enters it. In the previous implementation, the locality
criterion was the correspondence between the announced network address
(group) and the address with which the node was configured. However, by
design, network addresses are not unique identifiers of storage nodes in the
system.
Change comparisons by network addresses to comparisons by keys in all
packages with the logic described above. Implement `netmap.AnnouncedKeys`
interface on `cfg` type in the storage node application.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
There is a need to process public keys of the placement result.
Implement `Node.PublicKey` method which returns storage node's key announced
in netmap.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation `placement.Traverser.Next` method returned slice
of `network.AddressGroup` elements. There is a need to process keys of
storage nodes besides network addresses for intra-container communication.
Wrap `network.AddressGroup` in a new type `placement.Node` that summarizes
the storage node information required for communication. Return slice of
`Node` instances from `Traverser.Next` method. Fix compilation breaks in
dependent packages.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation Container service handlers didn't cache the
results of `Get` / `GetEACL` / `List` operations. As a consequence of this,
high load on the service caused neo-go client's connection errors. To avoid
this there is a need to use cache. Object service already uses `Get` and
`GetEACL` caches.
Implement cache of `List` results. Share already implemented cache of Object
service with the Container one. Provide new instance of read-only container
storage (defined as an interface)to morph executor's constructor on which
container service is based. Write operations remained unchanged.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation of Policer's job queue the same list of objects for
processing was selected at each iteration. This was caused by consistent
return of `engine.List` function.
Use `rand.Shuffle` function to compose pseudo-random list of all objects in
order to approximately evenly distribute objects to work.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Do not init caches for eACL, containers and netmap
if `disable_cache` config options is `true`, use
direct RPC calls instead.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Storage node should only reflect container Put requests to sidechain w/o any
validation. All verification steps are performed by IR.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Make Netmap service to return single network address on `LocalNodeInfo` RPC
in order to older clients.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
There is a need to support multiple server endpoints for reputation and
container transmission.
Replace `ServerInfo.Address` getter with `ServerInfo.IterateAddresses`
iterator.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In future server info will contain multiple endpoints whose string
representation will be worse suited to the cache key.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In future server info will contain multiple endpoints whose string
representation will be worse suited to the cache key.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Make placement `Traverser.Next` method to return ``[]network.AddressGroup`
in order to support multiple addresses of the storeage nodes.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Make Object Head service to work with `AddressGroup` instead of `Address`
in order to support multiple addresses of the storage node.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Make Object Search service to work with `AddressGroup` instead of `Address`
in order to support multiple addresses of the storage node.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Make Object Get service to work with `AddressGroup` instead of `Address` in
order to support multiple addresses of the storage node.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Make Object Put service to work with `AddressGroup` instead of `Address` in
order to support multiple addresses of the storage node.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Make `LocalAddressSource.LocalAddress` method to return `AddressGroup`. Make
`IsLocalAddress` function to accept parameter of type `AddressGroup`. Adopt
the application code with temporary `GroupFromAddress` helper.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
There is a need to generalize single-address client to group-address client.
To do this, we can re-implement `Client` interface from NeoFS API Go library
and still use it in the application code. There is a problem with method
`Raw` which must return single-address raw client. So as not to make changes
to API library we need to overload Client interface in order to support
`Raw` method in group-address client implementation.
Define `Client` interface in new `pkg/core/client` package. Completely
inherit API `Client` interface. Add `RawForAddress` method to build raw
client for the single node address. Adopt the application code that used Raw
method to work with new `Client`.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
`network.Address` structure in most cases created once and used read-only.
Replace `AddressFromString` function with `Address.FromString` method with
the same purpose and implementation. Make all libraries to work with value.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Return tyype is clear from the method's signature and docs, there is no
point in reflecting it in the name.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Panic if internal `manet.DialArgs` call returns error since this is
unexpected according to `AddressFromString` implementation.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Serve `ControlService` instance on configured endpoint (do not serve if not
specified). Read allowed keys from config.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement `ControlServiceServer` on `Server` type. The `Server` requires all
requests to be signed with keys from the so-called whitelist. To obtain
health status, it uses the abstraction in the form of `HealthChecker`
interface.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Define `ControlService` for IR similar to the one from storage node. Add
`HealthStatus` RPC which returns health status of the IR application.
Implement getters, setters and methods to sign/verify the messages.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
NeoFS network dictates the limitation of the maximum size of the "finished"
objects. The payload size of an object is recorded in its header. When
writing finished objects, the nodes must check:
* satisfying the constraint;
* matching the value in the header to the number of payload bytes.
Provide value returned by `MaxSizeSource` component to `validatingTarget`.
Check max size value during the stream of the "finished" objects. Check
header value during the streaming and on-close. Check payload size in v2
relay scenario.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
If container is removed via session, then session token should be included
in removal witness.
Write session token from request meta header to `container.RemovalWitness`
structure which is passed to `wrapper.Delete` function.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Make `wrapper.Delete` function to accept `container.RemovalWitness` struct
instead of its separated elements. `Signature` type is replaced by binary
signature since public key is unused.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
If eACL table is set via session, then session token should be written to
it.
Write session token from request meta header to `eacl.Table` structure which
is passed to `wrapper.PutEACL` function.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Rename `PutContext` to `ContextWithToken` and implement its constructor as a
separate function in order to reuse it in other RPCs.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
If container is created via session, then session token should be written to
it.
Write session token from request meta header to `Container` structure which
is passed to `wrapper.Put` function.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation wrapper over the Container contract's client
accepted the signature of the eACL table in addition to itself. After recent
changes in API Go lib table carries its signature. Thus, it is redundant
to pass the eACL table signature separately.
Make `wrapper.PutEACL` method to accept `eacl.Table` only.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation wrapper over the Container contract's client
accepted the signature of the container in addition to itself. After recent
changes in API Go lib container carries its signature. Thus, it is redundant
to pass the container signature separately.
Make `wrapper.Put` method to accept `Container` only.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation wrapper over the Container contract's client
returned the signature of the eACL table in addition to itself. After recent
changes in API Go lib table carries its signature. Thus, it is redundant to
return the table signature separately.
Make `Wrapper.GetEACL` method to return only `eacl.Table` with error.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In recent API changes `GetExtendedACLResponseBody` carries session token.
In recent API Go lib changes `eacl.Table` structure carries related session
token.
Write session token of eACL table from sidechain to GetExtendedACL response
body in node's `ContainerService` server.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In recent API changes `GetResponseBody` carries session token and signature.
In recent API Go lib changes `Container` structure carries its session
token and signature.
Write session token and signature of container from sidechain to Get
response body in node's `ContainerService` server.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
As it explained in previous commit, session token also should
be presented in original meta header but can be omitted in higher
layers.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Request meta headers are organized in a layers, where
upper layers re-sign down layers. Bearer token should be
a part of original meta header and it can be omitted in
upper layers. Therefore we need to traverse over linked list
of meta header to the original meta header to get bearer token.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Make `Get` method of the wrapper over Container contract's client to
accept binary container ID. Create `Get` function similar to the previous
`Get` variation. Use this function in Container service server in the place
where `Get` method was used.
Additionally implement `AsContainerSource` function which allows
to simply compose container Source interface from the wrapper.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Make `Delete` method of the wrapper over Container contract's client to accept
two binary parameters: container ID and signature. Create `Delete` function
similar to the previous `Delete` variation, but accepting `Signature`
structure instead of binary signature. Use this function in Container
service server in the place where `Delete` method was used.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Make `Put` method of the wrapper over Container contract's client to accept
three binary parameters: container, key and signature. Create `Put` function
similar to the previous `Put` variation, but accepting `Signature`
structure instead of binary key and signature. Use this function in
Container service server in the place where `Put` method was used.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In recent changes argument list of set eACL call of Container contract
client was extended with binary public key. In the future there will be a
need to pass the table in binary format.
Replace `PutEACL` method with `PutEACLBinary` one which accepts three binary
parameters: eACL table, key and signature. Create `PutEACL` function similar
to the removed method, but accepting `Signature` structure instead of just
a signature. Use this function in Container service server in the place
where `PutEACL` was used.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Request forwarding callback should be called only if set since it is an
optional parameter.
Call `forwarder` function only if it is non-nil.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Request forwarding callback should be called only if set since it is an
optional parameter. In GetRangeHash forwarder is never set.
Call `forwarder` function only if it is non-nil. Remove no longer needed
`hashOnly` option.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Wrap functions at `pkg/errors` return nil if error argument
was nil. fmt.Errorf always returns error so we need to add
missing error checks to the code.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
In current implementation `Object.GetRangeHash` RPC handler forwards range
requests for payload data. Missing request forwarder of the original request
caused NPE during execution.
Do not call request forwarder if payload range hash is requested.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
To enable TLS support we can't operate with IP addresses directly.
Certificates are issued with host names so it is required to
pass them into RPC client. DNS resolving should be done by transport
layer and not be a part of node. Therefore `IPAddrString` usage is
removed from code.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Includes:
- Delete first `ctx` argument in `Write` method.
- Move intermediate Initial trust struct and method
to `calculator` file.
- Change Alpha to 0.1.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Delete reading `alpha` from env var. Cover
retrieving `alpha` behind interface in
intermediate calculator. Add TODO to decide
if it is necessary to receive that param from
global config or not.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Add implementation of Builder interface for
intermediate trusts. Move all code associated
with managers to `common` directory in `cmd`
and `pkg/services/reputation`
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Change anonymous func arg for `Iterate`
methods of Storages to `PeerTrustsHandler`
type for implementing corresponding
interface.
Implement missing `Iterate` method for
daughter Storage.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Allocate capacity instead of length of the slice to write the object payload
range since each chunk is written through `append`.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation node's Object Get/Head/GetRange V2 service
handlers created a new request for each RPC. Now original requests are
re-signed according to API specification. Logical handler abstracts from
this version-dependent logic through `RequestForwarder` callback.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation node's Object Search V2 service handler created a
new request for each RPC. Now original requests are re-signed according to
API specification. Logical handler abstracts from this version-dependent
logic through `RequestForwarder` callback.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Add `Router` to the reputation server. `Router` is
called on every incoming request and inits `Writer`
that sends `Trust`s to the next route point or
handle(logs in that implementation) them if current
node is the end point of the route.
Rename `onlyKeyRemoteServerInfo` struct for container
to separate it from the same implementation of the
same `ServerInfo` interface for reputation.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Declare interfaces for building list of
managers of certain peer in certain epoch.
Implement `Builder` struct that aggregates
fields that are necessary for building
list of managers.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Implement reputation `Router` and its constructor,
designed to define where to send local trusts.
Router is based on dependencies that are hidden
behind interfaces, that are declared in the router's
package.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Replace usage of `cache.ClientCache` type with interface with similar
signature. This will further allow overloading clients without affecting the
logic of dependent packages.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement in-memory `Storage` which is going to be used to submit the
results of interactions with network members. `Storage` also provides an
iterator interface, so the component can be used in `Controller`.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement `Controller` designed to analyze the values collected by the local
node (the source is hidden behind Writer/WriterProvider interfaces) and
transfer them to the destination (hidden behind Iterator / IteratorProvider
interface).
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
At object.Put operation node does not transfer any
data. It is done in the stream inside, so we should
register duration from `object.Put` invocation until
`CloseAndRecv` on the stream.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
We can't rely on object size in the header because it
might be omitted on initial put or it can be 0xFF.. on
streaming data.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Because options are not used when client is already in cache
providing them to shared cache is misleading at best.
In the worst case `dial_timeout` is set randomly (because of race
condition) which can lead to one service having `dial_timeout` of
another. Thus we set default client creation options when cache is
created.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
Replace `eacl.Storage` interface implementation from eACL lib to neofs-node
app package. Remove `eacl.WithMorphClient` option in order to abstract eACL
validator from eACL storage implementation.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Right now we pass redundant copy to callback outside the for-loop through
the helpful boolean variable instead of calling it deeply nested.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Detect redundant local copy of the object in Object Policer. Add redundant
copy callback (`WithRedundantCopyCallback` option). Pass address of the
redundant copy to callback.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Re-compile protobuf definition of Control service. Implement required
messages on DropObjects RPC request and response messages. Implement
`DropObjects` method on Control service server of the node. Use
`StorageEngine.Delete` method as a deleted object handler on server.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
There is a need to define storage node's interface to remove objects from
the local storage.
Define `DropObjects` RPC in `ControlService`. Define `DropObjectsRequest` /
`DropObjectsResponse` structure of the request / response messages.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement `NetworkInfo` calls on full stack of Netmap services. Current
epoch is read from node local state, magic number is read via `MagicNumber`
call of morph client.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Make object delete service to use network information to calculate and set
expiration of the created tombstone.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
The lifetime of an object can be limited by specifying a correspondin
well-known attribute. Node should refuse to save expired objects.
Checking objects in FormatValidator is extended with an expiration attribute
parsing step.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Add SignWithRFC6979 option to signature verification function since eACL
table are signed by users with this option.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Since the contract started returning the table signature, it became
necessary to check its correctness.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement route Builder interface on wrapper over the container placement
builder, Component implies exactly one transfer to each of the most weight
nodes of the container (according to some weighing algorithm).
Implementation is planned for use when transferring local estimates of
storage nodes.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement a component for transmitting the value of the used container space
along a route defined in the system. Implement WriterProvider interface on
it. By implementation, it is the link between the route planner and the
point-to-point transmitter, and abstracts from the implementation of both of
them. In the future, this implementation will be used as a transmitter of
local estimates of storage nodes among themselves.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement functions to wrap Writer or Iterator. The resulting wrapper
provides WriterProvider or IteratorProvider interface respectively.
Such a wrapper can be used as a single storage instance provider
regardless of context.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement a component that stores the values of the used space of
containers. The storage allows you to write several values for a fixed
container and epoch number, and read the averaged estimates of all
accumulated values. All values are stored in memory. This component is
planned to be used as an accumulator of opinions from various network
participants about the fullness of the container.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement a component that connects the value stores of the used space of
containers. Implement the Start/Stop operations on it, which will later
become the application handlers of the corresponding events from the
sidechain. The main task of the controller is to temporarily synchronize the
stages of calculating the global estimate of the used space in the
container. The details of the score calculation (the way of collecting /
transmitting local scores, the final score formula and writing to the
contract) are encapsulated in the dependency components, the controller is
abstracted from them.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Classifier looks at list of inner ring nodes and container
nodes from current and previous epoch to classify request.
Sometimes these checks might return error.
Consider there is a request from unknown key and container's
placement policy valid for current epoch and invalid for past
epoch. Classifier tries to find if key belongs to container
node from current epoch -- it is not. Then it tries to find if
key belongs to container node from past epoch and it throws
error, because placement policy is invalid for past epoch.
This is a legit case and classifier should ignore such errors
to provide best effort in matching. The only error classifier
should return is an error when request does not contain
public key to classify it.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Replace static NodeInfo structure with NodeState interface that provides
method to read node information in runtime.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Add HealthStatus method to HealthChecker interface that should return
current health status of the node application.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement methods required for signatures. Receive network map from netmap
storage, convert it to Control service message and return in response.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Add NetmapSnapshot rpc to ControlService protobuf definition. Recompile
proto files. Add required method to server structure.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Support processing of NetmapEpoch and NetmapLookupDepth X-headers when
processing object read operations. Placement for operations
Get/Head/GetRange/GetRangeHash/Search is built for the epoch specified in
NetmapEpoch X-header (by default latest). Also the specified operations are
processed until success is achieved for network maps from the past up to
NetmapLookupDepth value. Behavior for default values (zero or missing) left
unchanged.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Add binary salt field to RangeHashPrm struct. Implement field setter. Set
salt from the request in v2 service.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation of eACL service v2 the response X-headers were
validated at the stage of re-checking eACL. This provoked a mismatch of
records in the eACL table with requests. Fix this behavior by checking the
headers from the request, not the response.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Forward request X-headers to client calls during internal processing of
Object operations on the node.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Since PoR audit check uses object.Head with large TTL values to
make real proof of retrievability, we may use random remote
nodes.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
PDP audit check is not quite working with very small objects, so
we try to build coverage with bigger objects.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
This function converts 2-dimension array of container nodes
into single dimension array. Useful when we need to iterate
over whole container.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Add numeric return from TaskManager.Reset method that shows the number of
canceled tasks. This values will be used for assessment of the progress of
the audit.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Define interface of the container communicator which methods are going to be
used in audit checks. Make innerring Server to implement this interface.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement Reset method on audit task manager that cleans task queue.
Extended TaskManager interface with Reset method on IR side. Call Reset
method in audit processor before new audit start.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation parent object header finalized twice in size
limiter + formatter. On the one hand, this added redundant action, on the
other hand, it could provoke a difference in the headers of the linking and
the last part. Change formatter to finalize parent header if it does not
container the signature. Change size limiter to reuse parent header after
last child finalization in linking child.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation eACL validator didn't take into account container
and object ID fields of request bodies.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Every unknown error must not decrease shortage counter and must not
exclude faulty node from the node list, because this list will be used
later for replication.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
With the update of the local storage engine, the headers of virtual objects
are directly given. In this regard, the step with obtaining the the right
child header is removed.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation linking object inherited only ID of the parent
object. From now it inherits full header like last child.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation child objects inherited parent attributes after
split-transformation, which was redundant. From now attributes are not
inherited.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation placement traverser processed incorrectly with
local placement build. Also entity incorrectly traversed the placement
vectors for fixed number read operations until success. The erroneous
behavior was due to the use of a vector number of successes instead of
a scalar number in these scenarios.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
With updated specification of object related operation
we don't have this search attribute any more and we
should not use functions related to this attribute.
This commit breaks object service logic, however it will
be fixed later.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
ErrEACLNotFound error was defined in implementation package. EACL validator
checked this error after the call of eACL storage interface method. Replace
ErrEACLNotFound to core container library. in order to: on the one hand not
use an implementation error, on the other hand, to be able to reuse a
generic type error (404).
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Now morph library returns error if there is not eACL in
sidechain storage. However in this case eACL check should
be passed since it is the same as having empty eACL table.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Sticky bit checks if object owner and request owner are the
same. Container owner should not used in this check.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
`owner` field may be misused as request sender owner, however
it is a owner of a container for that request. New naming
should be clear.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Define ErrRelationNotFound error in searchsvc package. Return
ErrRelationNotFound from RelationSearcher.SearchRelation method if search
result is empty.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Refactored pkg/netmap package provides JSON converters for
NodeInfo and PlacementPolicy structures, that has been used
by client applications.
It also updates Node structure itself so it is a part of
grpc <-> v2 <-> pkg conversion chain.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Replace meta Bucket with meta.DB instance in local storage implementation.
Adopt all dependent components to new local storage.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Call CheckFormat function in container.Put handler for conducting initial
checks of the structure that are not performed by the smart contract.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Make Policer to call AddTask method of Replicator when an insufficient
number of copies of an object is detected in the container.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement Replicator service that performs background work to replicate
local object to remote nodes in the container. Replicator is going to be
used by Policer.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
There is a bit to allow or deny bearer token check for
each object service method. If this bit is not set then
ignore bearer token and use extended ACL table from
sidechain.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
If bearer token is presented in the request then check
if it is a valid one and then use it to process extended
ACL checks.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Malicious user can stole public session key and use
it by sending request from it's own scope. To prevent
this each session token is signed and signature private
key must be corresponded with owner id in token. Therefore
malicious node cannot impersonate request without private
key to sign token.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Implement Policer service that performs background work to check compliance
with the placement policy for local objects in the container. In the initial
implementation, the selection of the working queue of objects is
simplified, and there is no transfer of the result to the replicator.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Define ErrNotFound error in headsvc package. Return ErrNotFound from Head
method if the header was not found in the container.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Wrong boolean operation order made matcher return false
on `non-root` search query with non-regular objects. Instead
it should return true for `non-root` query and false for `root`
query.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
If object service produces new request, the should contain
session token. This is the only way for node to grant access
for a private container.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Classifier fetches public key of the request owner
and owner itself. Extended ACL check should rely on
this public key, because it might be extracted from
session token.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
With one tombstone for split objects we can't simply
place it in container. We should inform all nodes that
store split objects of removed original object.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Owner of the request is stored in session token most of the times.
Put request contains session token in the object body, so we have
to fetch it from there.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
GRPC has default message limit of 4MiB. Since every transmitted
neofs message has to be signed, then original message should
be split into transfer fit structures before signature service.
This commit introduce transport payload splitter for object
service pipeline. This splitter works with stream response
for methods:
- object.Get
- object.Range
- object.Search
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
In previous implementation InitRelations call in payload size limiter was
called in write chunk method. This provoked clearing the split header in
children starting from the second.
Replace InitRelations call to the 1st child allocating stage.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Refactor query to match object and its parents in a single call. Support
KeyRoot and KeyLeaf filters.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation object.Search services allowed to search only
physically stored objects. This limitation did not allow getting the ID of
the split object.
Extend search execution logic with parent object filtering. Parent objects
that passed filters are now included in the result
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Use key storage in object services in order to sign requests with private
session key within user session.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Add session token argument to object formatter constructor which is written
to the object. Pass session token from trusted object Put.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Basic ACL checker gets request field via getters that are
NPE-free, therefore we don't need to worry about function
invocations on nil structures.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
ACL has to classify request senders by roles:
- owner of the container,
- request from container or inner ring node,
- any other request.
According to this roles ACL checker use different
bits of basic ACL to grant or deny access.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
In previous implementation payload size limiter panicked in case of payload
emptiness. It was caused by the component waiting for at least one write of
a part of the payload.
Fix NPE occurrence with internal initialization after the WriteHeader call.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Add SetSeekRange method to RangeTraverser that switches traverser to work
with provided object payload range.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
