libvirt/daemon/libvirtd.h

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/*
* libvirtd.h: daemon data structure definitions
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*
* Copyright (C) 2006-2015 Red Hat, Inc.
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* Copyright (C) 2006 Daniel P. Berrange
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
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*
* Author: Daniel P. Berrange <berrange@redhat.com>
*/
#ifndef LIBVIRTD_H__
# define LIBVIRTD_H__
# define VIR_ENUM_SENTINELS
# include <rpc/types.h>
# include <rpc/xdr.h>
# include "remote_protocol.h"
# include "admin_protocol.h"
# include "lxc_protocol.h"
# include "qemu_protocol.h"
# include "virthread.h"
# if WITH_SASL
# include "virnetsaslcontext.h"
# endif
# include "virnetserverprogram.h"
typedef struct daemonClientStream daemonClientStream;
typedef daemonClientStream *daemonClientStreamPtr;
typedef struct daemonClientPrivate daemonClientPrivate;
typedef daemonClientPrivate *daemonClientPrivatePtr;
typedef struct daemonAdmClientPrivate daemonAdmClientPrivate;
typedef daemonAdmClientPrivate *daemonAdmClientPrivatePtr;
event: track callbackID on daemon side of RPC Right now, the daemon side of RPC events is hard-coded to at most one callback per eventID. But when there are hundreds of domains or networks coupled and multiple conections, then sending every event to every connection that wants an event, even for the connections that only care about events for a particular object, is inefficient. In order to track more than one callback in the server, we need to store callbacks by more than just their eventID. This patch rearranges the daemon side to store network callbacks in a dynamic array, which can eventually be used for multiple callbacks of the same eventID, although actual behavior is unchanged without further patches to the RPC protocol. For ease of review, domain events are saved for a later patch, as they touch more code. While at it, fix a bug where a malicious client could send a negative eventID to cause network event registration to access outside of array bounds (thankfully not a CVE, since domain events were already doing the bounds check, and since network events have not been released). * daemon/libvirtd.h (daemonClientPrivate): Alter the tracking of network events. * daemon/remote.c (daemonClientEventCallback): New struct. (remoteEventCallbackFree): New function. (remoteClientInitHook, remoteRelayNetworkEventLifecycle) (remoteClientFreeFunc) (remoteDispatchConnectNetworkEventRegisterAny): Track network callbacks differently. (remoteDispatchConnectNetworkEventDeregisterAny): Enforce bounds. Signed-off-by: Eric Blake <eblake@redhat.com>
2014-01-05 19:37:17 +00:00
typedef struct daemonClientEventCallback daemonClientEventCallback;
typedef daemonClientEventCallback *daemonClientEventCallbackPtr;
Helper functions for processing data streams in libvirtd Defines the extensions to the remote protocol for generic data streams. Adds a bunch of helper code to the libvirtd daemon for working with data streams. * daemon/Makefile.am: Add stream.c/stream.h to build * daemon/stream.c, qemud/stream.h: Generic helper functions for creating new streams, associating streams with clients, finding existing streams for a client and removing/deleting streams. * src/remote/remote_protocol.x: Add a new 'REMOTE_STREAM' constant for the 'enum remote_message_type' for encoding stream data in wire messages. Add a new 'REMOTE_CONTINUE' constant to 'enum remote_message_status' to indicate further data stream messsages are expected to follow. Document how the remote_message_header is used to encode data streams * src/remote/remote_protocol.h: Regenerate * daemon/dispatch.c: Remove assumption that a error message sent to client is always type=REMOTE_REPLY. It may now also be type=REMOTE_STREAM. Add convenient method for sending outgoing stream data packets. Log and ignore non-filtered incoming stream packets. Add a method for serializing a stream error message * daemon/dispatch.h: Add API for serializing stream errors and sending stream data packets * daemon/qemud.h: Add struct qemud_client_stream for tracking active data streams for clients. Tweak filter function operation so that it accepts a client object too. * daemon/qemud.c: Refactor code for free'ing message objects which have been fully transmitted into separate method. Release all active streams when client shuts down. Change filter function to be responsible for queueing the message
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/* Stores the per-client connection state */
struct daemonClientPrivate {
/* Hold while accessing any data except conn */
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virMutex lock;
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daemonClientEventCallbackPtr *domainEventCallbacks;
size_t ndomainEventCallbacks;
event: track callbackID on daemon side of RPC Right now, the daemon side of RPC events is hard-coded to at most one callback per eventID. But when there are hundreds of domains or networks coupled and multiple conections, then sending every event to every connection that wants an event, even for the connections that only care about events for a particular object, is inefficient. In order to track more than one callback in the server, we need to store callbacks by more than just their eventID. This patch rearranges the daemon side to store network callbacks in a dynamic array, which can eventually be used for multiple callbacks of the same eventID, although actual behavior is unchanged without further patches to the RPC protocol. For ease of review, domain events are saved for a later patch, as they touch more code. While at it, fix a bug where a malicious client could send a negative eventID to cause network event registration to access outside of array bounds (thankfully not a CVE, since domain events were already doing the bounds check, and since network events have not been released). * daemon/libvirtd.h (daemonClientPrivate): Alter the tracking of network events. * daemon/remote.c (daemonClientEventCallback): New struct. (remoteEventCallbackFree): New function. (remoteClientInitHook, remoteRelayNetworkEventLifecycle) (remoteClientFreeFunc) (remoteDispatchConnectNetworkEventRegisterAny): Track network callbacks differently. (remoteDispatchConnectNetworkEventDeregisterAny): Enforce bounds. Signed-off-by: Eric Blake <eblake@redhat.com>
2014-01-05 19:37:17 +00:00
daemonClientEventCallbackPtr *networkEventCallbacks;
size_t nnetworkEventCallbacks;
daemonClientEventCallbackPtr *qemuEventCallbacks;
size_t nqemuEventCallbacks;
daemonClientEventCallbackPtr *storageEventCallbacks;
size_t nstorageEventCallbacks;
daemonClientEventCallbackPtr *nodeDeviceEventCallbacks;
size_t nnodeDeviceEventCallbacks;
bool closeRegistered;
# if WITH_SASL
virNetSASLSessionPtr sasl;
# endif
Helper functions for processing data streams in libvirtd Defines the extensions to the remote protocol for generic data streams. Adds a bunch of helper code to the libvirtd daemon for working with data streams. * daemon/Makefile.am: Add stream.c/stream.h to build * daemon/stream.c, qemud/stream.h: Generic helper functions for creating new streams, associating streams with clients, finding existing streams for a client and removing/deleting streams. * src/remote/remote_protocol.x: Add a new 'REMOTE_STREAM' constant for the 'enum remote_message_type' for encoding stream data in wire messages. Add a new 'REMOTE_CONTINUE' constant to 'enum remote_message_status' to indicate further data stream messsages are expected to follow. Document how the remote_message_header is used to encode data streams * src/remote/remote_protocol.h: Regenerate * daemon/dispatch.c: Remove assumption that a error message sent to client is always type=REMOTE_REPLY. It may now also be type=REMOTE_STREAM. Add convenient method for sending outgoing stream data packets. Log and ignore non-filtered incoming stream packets. Add a method for serializing a stream error message * daemon/dispatch.h: Add API for serializing stream errors and sending stream data packets * daemon/qemud.h: Add struct qemud_client_stream for tracking active data streams for clients. Tweak filter function operation so that it accepts a client object too. * daemon/qemud.c: Refactor code for free'ing message objects which have been fully transmitted into separate method. Release all active streams when client shuts down. Change filter function to be responsible for queueing the message
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/* This is only valid if a remote open call has been made on this
* connection, otherwise it will be NULL. Also if remote close is
* called, it will be set back to NULL if that succeeds.
*/
virConnectPtr conn;
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daemonClientStreamPtr streams;
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};
/* Separate private data for admin connection */
struct daemonAdmClientPrivate {
/* Just a placeholder, not that there is anything to be locked */
virMutex lock;
virNetDaemonPtr dmn;
};
# if WITH_SASL
extern virNetSASLContextPtr saslCtxt;
# endif
extern virNetServerProgramPtr remoteProgram;
extern virNetServerProgramPtr qemuProgram;
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#endif