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| author | Markus Armbruster <armbru@redhat.com> | 2018-07-03 10:53:43 +0200 |
|---|---|---|
| committer | Markus Armbruster <armbru@redhat.com> | 2018-07-03 23:18:56 +0200 |
| commit | 69240fe62d1ae02257bc0694a11c478b10378948 (patch) | |
| tree | 27c70b833e5435b942932de13221b49983e8e1b4 /qapi | |
| parent | e8f4a22168f573633f31fad3d6bfcbe5f0259b28 (diff) | |
| download | qemu-69240fe62d1ae02257bc0694a11c478b10378948.zip qemu-69240fe62d1ae02257bc0694a11c478b10378948.tar.gz qemu-69240fe62d1ae02257bc0694a11c478b10378948.tar.bz2 | |
qmp: Don't let malformed in-band commands jump the queue
handle_qmp_command() reports certain errors right away. This is wrong
when OOB is enabled, because the errors can "jump the queue" then, as
the previous commit demonstrates.
To fix, we need to delay errors until dispatch. Do that for semantic
errors, mostly by reverting ill-advised parts of commit cf869d53172
"qmp: support out-of-band (oob) execution". Bonus: doesn't run
qmp_dispatch_check_obj() twice, once in handle_qmp_command(), and
again in do_qmp_dispatch(). That's also due to commit cf869d53172.
The next commit will fix queue jumping for syntax errors.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180703085358.13941-18-armbru@redhat.com>
Diffstat (limited to 'qapi')
| -rw-r--r-- | qapi/qmp-dispatch.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/qapi/qmp-dispatch.c b/qapi/qmp-dispatch.c index 12be120..6d78f3e 100644 --- a/qapi/qmp-dispatch.c +++ b/qapi/qmp-dispatch.c @@ -20,8 +20,8 @@ #include "qapi/qmp/qbool.h" #include "sysemu/sysemu.h" -QDict *qmp_dispatch_check_obj(const QObject *request, bool allow_oob, - Error **errp) +static QDict *qmp_dispatch_check_obj(const QObject *request, bool allow_oob, + Error **errp) { const char *exec_key = NULL; const QDictEntry *ent; @@ -78,6 +78,7 @@ static QObject *do_qmp_dispatch(QmpCommandList *cmds, QObject *request, bool allow_oob, Error **errp) { Error *local_err = NULL; + bool oob; const char *command; QDict *args, *dict; QmpCommand *cmd; @@ -89,9 +90,11 @@ static QObject *do_qmp_dispatch(QmpCommandList *cmds, QObject *request, } command = qdict_get_try_str(dict, "execute"); + oob = false; if (!command) { assert(allow_oob); command = qdict_get_str(dict, "exec-oob"); + oob = true; } cmd = qmp_find_command(cmds, command); if (cmd == NULL) { @@ -104,6 +107,11 @@ static QObject *do_qmp_dispatch(QmpCommandList *cmds, QObject *request, command); return NULL; } + if (oob && !(cmd->options & QCO_ALLOW_OOB)) { + error_setg(errp, "The command %s does not support OOB", + command); + return false; + } if (runstate_check(RUN_STATE_PRECONFIG) && !(cmd->options & QCO_ALLOW_PRECONFIG)) { |