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* qapi: protect against NULL QObject in qmp_input_get_objectPaolo Bonzini2011-12-191-4/+6
| | | | | | | | | | | | | | A NULL qobj can occur when a parameter is fetched via qdict_get, but the parameter is not in the command. By returning NULL, the caller can choose whether to raise a missing parameter error, an invalid parameter type error, or use a default value. For example, qom-set could can use this to reset a property to its default value, though at this time it will fail with "Invalid parameter type". In any case, anything is better than crashing! Reviewed-by: Anthony Liguori <anthony@codemonkey.ws> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
* guest agent: add supported command list to guest-info RPCMichael Roth2011-12-132-0/+14
| | | | | | | | | | | Not that there is blacklisting functionality we can no longer infer the agent's capabilities via version. This patch extends the current guest-info RPC to also return a list of dictionaries containing the name of each supported RPC, along with a boolean indicating whether or not the command has been disabled by a guest administrator/distro. Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
* guest agent: add RPC blacklist command-line optionMichael Roth2011-12-133-5/+45
| | | | | | | | | | | | | | | | | | | This adds a command-line option, -b/--blacklist, that accepts a comma-seperated list of RPCs to disable, or prints a list of available RPCs if passed "?". In consequence this also adds general blacklisting and RPC listing facilities to the new QMP dispatch/registry facilities, should the QMP monitor ever have a need for such a thing. Ideally, to avoid support/compatability issues in the future, blacklisting guest agent functionality will be the exceptional case, but we add the functionality here to handle guest administrators with specific requirements. Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
* qapi: Check for negative enum valuesLuiz Capitulino2011-11-171-1/+1
| | | | | | | | | | We don't currently check for negative enum values in qmp_output_type_enum(), this will very likely generate a segfault when triggered. However, it _seems_ that no code in tree can trigger this today. Acked-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
* qapi: modify visitor code generation for list iterationMichael Roth2011-10-042-6/+18
| | | | | | | | | | | | Modify logic such that we never assign values to the list head argument to progress through the list on subsequent iterations, instead rely only on having our return value passed back in as an argument on the next call. Also update QMP I/O visitors and test cases accordingly, and add a missing test case for QmpOutputVisitor. Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
* qapi: dealloc visitor, support freeing of nested listsMichael Roth2011-10-041-7/+21
| | | | | | | | | | Previously our logic for keeping track of when we're visiting the head of a list was done via a global bool. This can be overwritten if dealing with nested lists, so use stack entries to track this instead. Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
* qapi: dealloc visitor, fix premature free and iteration logicMichael Roth2011-10-041-5/+15
| | | | | | | | | | | | | | | | | | | | | | Currently we do 3 things wrong: 1) The list iterator, in practice, is used in a manner where the pointer we pass in is the same as the pointer we assign the output to from visit_next_list(). This causes an infinite loop where we keep freeing the same structures. 2) We attempt to free list->value rather than list. visit_type_<type> handles this. We should only be concerned with the containing list. 3) We free prematurely: iterator function will continue accessing values we've already freed. This patch should fix all of these issues. QmpOutputVisitor also suffers from 1). Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
* qapi: add code generation support for middle modeAnthony Liguori2011-10-041-0/+3
| | | | | | | | | | | | | | | | To get the ball rolling merging QAPI, this patch introduces a "middle mode" to the code generator. In middle mode, the code generator generates marshalling functions that are compatible with the current QMP server. We absolutely need to replace the current QMP server in order to support proper asynchronous commands but using a middle mode provides a middle-ground that lets us start converting commands in tree. Note that all of the commands have been converted already in my glib branch. Middle mode only exists until we finish merging them from my branch into the main tree. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
* Use glib memory allocation and free functionsAnthony Liguori2011-08-214-19/+19
| | | | | | qemu_malloc/qemu_free no longer exist after this commit. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
* qapi: add QMP dispatch functionsMichael Roth2011-07-212-0/+126
| | | | | | | | | | | | Given an object recieved via QMP, this code uses the dispatch table provided by qmp_registry.c to call the corresponding marshalling/dispatch function and format return values/errors for delivery to the QMP. Currently only synchronous QMP functions are supported, but this will also be used for async QMP functions and QMP guest proxy dispatch as well. Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>
* qapi: add QMP command registration/lookup functionsMichael Roth2011-07-212-0/+79
| | | | | | | | Registration/lookup functions for that provide a lookup table for dispatching QMP commands. Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>
* qapi: add QAPI dealloc visitorMichael Roth2011-07-212-0/+173
| | | | | | | | Type of Visitor class that can be passed into a qapi-generated C type's visitor function to free() any heap-allocated data types. Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>
* qapi: add QMP output visitorMichael Roth2011-07-212-0/+267
| | | | | | | | | | | Type of Visiter class that serves as the inverse of the input visitor: it takes a series of native C types and uses their values to construct a corresponding QObject. The command marshaling/dispatcher functions will use this to convert the output of QMP functions into a QObject that can be sent over the wire. Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>
* qapi: add QMP input visitorMichael Roth2011-07-212-0/+328
| | | | | | | | | | | A type of Visiter class that is used to walk a qobject's structure and assign each entry to the corresponding native C type. Command marshaling function will use this to pull out QMP command parameters recieved over the wire and pass them as native arguments to the corresponding C functions. Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>
* qapi: add QAPI visitor coreMichael Roth2011-07-213-0/+214
Base definitions/includes for Visiter interface used by generated visiter/marshalling code. Includes a GenericList type. Our lists require an embedded element. Since these types are generated, if you want to use them in a different type of data structure, there's no easy way to add another embedded element. The solution is to have non-embedded lists and that what this is. Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>