On 04/12/2018 08:41 AM, Marc Hartmayer wrote:
> Use virNetServerGetProgram() to determine the virNetServerProgram
> instead of using hard coded global variables. This allows us to remove
> the global variables @remoteProgram and @qemuProgram as they're now no
> longer necessary.
>
> Signed-off-by: Marc Hartmayer <[email protected]>
> Reviewed-by: Boris Fiuczynski <[email protected]>
> ---
>
> Note: I'm not 100% sure that there is no case where the lock for
> @client is already held by the thread which is calling
> virNetServerGetProgram and thus the lock order would be violated (the
> lock order has to be @server -> @client in the violating case it would
> be @client -> @server and therefore a deadlock might occur).
>
Well the way I read virNetServerProgramDispatchCall it would seem both
@server and @client must be unlocked:
/*
* When the RPC handler is called:
*
* - Server object is unlocked
* - Client object is unlocked
*
* Without locking, it is safe to use:
*
* 'args and 'ret'
*/
rv = (dispatcher->func)(server, client, msg, &rerr, arg, ret);
> ---
> src/libvirt_remote.syms | 1 +
> src/remote/remote_daemon.c | 4 +-
> src/remote/remote_daemon.h | 3 -
> src/remote/remote_daemon_dispatch.c | 116
> +++++++++++++++++++++++++++---------
> src/rpc/gendispatch.pl | 6 ++
> src/rpc/virnetserver.c | 23 +++++++
> src/rpc/virnetserver.h | 2 +
> 7 files changed, 122 insertions(+), 33 deletions(-)
>
Reviewed-by: John Ferlan <[email protected]>
John
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