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qmp: support out-of-band (oob) execution

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Having "allow-oob":true for a command does not mean that this command
will always be run in out-of-band mode.  The out-of-band quick path will
only be executed if we specify the extra "run-oob" flag when sending the
QMP request:

    { "execute":   "command-that-allows-oob",
      "arguments": { ... },
      "control":   { "run-oob": true } }

The "control" key is introduced to store this extra flag.  "control"
field is used to store arguments that are shared by all the commands,
rather than command specific arguments.  Let "run-oob" be the first.

Note that in the patch I exported qmp_dispatch_check_obj() to be used to
check the request earlier, and at the same time allowed "id" field to be
there since actually we always allow that.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20180309090006.10018-19-peterx@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[eblake: rebase to qobject_to(), spelling fix]
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Peter Xu
2018-03-10 20:38:05 -06:00
committed by Eric Blake
parent 876c67512e
commit cf869d5317
4 changed files with 111 additions and 10 deletions
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2
trace-events
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@ -48,6 +48,8 @@ monitor_protocol_event_queue(uint32_t event, void *qdict, uint64_t rate) "event=
handle_hmp_command(void *mon, const char *cmdline) "mon %p cmdline: %s"
handle_qmp_command(void *mon, const char *req) "mon %p req: %s"
monitor_suspend(void *ptr, int cnt) "mon %p: %d"
monitor_qmp_cmd_in_band(const char *id) "%s"
monitor_qmp_cmd_out_of_band(const char *id) "%s"
# dma-helpers.c
dma_blk_io(void *dbs, void *bs, int64_t offset, bool to_dev) "dbs=%p bs=%p offset=%" PRId64 " to_dev=%d"