monitor: Drop broken, unused asynchronous command interface

The asynchronous monitor command interface goes back to commit 940cc30
(Jan 2010). Added a third case to command execution. The hope bac

monitor: Drop broken, unused asynchronous command interface

The asynchronous monitor command interface goes back to commit 940cc30
(Jan 2010). Added a third case to command execution. The hope back
then according to the commit message was that all commands get
converted to the asynchronous interface, killing off the other two
cases. Didn't happen.

The initial asynchronous commands balloon and info balloon were
converted back to synchronous long ago (commit 96637bc and d72f32),
with commit messages calling the asynchronous interface "not fully
working" and "deprecated". The only other user went away in commit
3b5704b.

New code generally uses synchronous commands and asynchronous events.

What exactly is still "not fully working" with asynchronous commands?
Well, here's a bug that defeats actual asynchronous use pretty
reliably: the reply's ID is wrong (and has always been wrong) unless
you use the command synchronously! To reproduce, we need an
asynchronous command, so we have to go back before commit 3b5704b.
Run QEMU with spice:

$ qemu-system-x86_64 -nodefaults -S -spice port=5900,disable-ticketing -qmp stdio
{"QMP": {"version": {"qemu": {"micro": 94, "minor": 2, "major": 2}, "package": ""}, "capabilities": []}}

Connect a spice client in another terminal:

$ remote-viewer spice://localhost:5900

Set up a migration destination dummy in a third terminal:

$ socat TCP-LISTEN:12345 STDIO

Now paste the following into the QMP monitor:

{ "execute": "qmp_capabilities", "id": "i0" }
{ "execute": "client_migrate_info", "id": "i1", "arguments": { "protocol": "spice", "hostname": "localhost", "port": 12345 } }
{ "execute": "query-kvm", "id": "i2" }

Produces two replies immediately, one to qmp_capabilities, and one to
query-kvm:

{"return": {}, "id": "i0"}
{"return": {"enabled": false, "present": true}, "id": "i2"}

Both are correct. Two lines of debug output from libspice-server not
shown.

Now EOF socat's standard input to make it close the connection. This
makes the asynchronous client_migrate_info complete. It replies:

{"return": {}}

Bug: "id": "i1" is missing. Two lines of debug output from
libspice-server not shown. Cherry on top: storage for the missing ID
is leaked.

Get rid of this stuff before somebody hurts himself with it.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>

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monitor: Remove unused functions

The functions ringbuf_read_completion() and monitor_get_rs()
are not used anywhere anymore, so let's remove them.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.c

monitor: Remove unused functions

The functions ringbuf_read_completion() and monitor_get_rs()
are not used anywhere anymore, so let's remove them.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Cc: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

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qom: Implement info qom-tree HMP command

To complement qdev's bus-oriented info qtree, info qom-tree
prints a hierarchical view of the QOM composition tree.

By default, the machine composition tree

qom: Implement info qom-tree HMP command

To complement qdev's bus-oriented info qtree, info qom-tree
prints a hierarchical view of the QOM composition tree.

By default, the machine composition tree is shown. This can be overriden
by supplying a path argument, such as "info qom-tree /".

Tested-by: Alistair Francis <alistair.francis@xilinx.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>

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Merge remote-tracking branch 'remotes/armbru/tags/pull-error-2015-02-18' into staging

Clean up around error_get_pretty(), qerror_report_err()

# gpg: Signature made Wed Feb 18 10:10:07 2015 GMT usin

Merge remote-tracking branch 'remotes/armbru/tags/pull-error-2015-02-18' into staging

Clean up around error_get_pretty(), qerror_report_err()

# gpg: Signature made Wed Feb 18 10:10:07 2015 GMT using RSA key ID EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg: aka "Markus Armbruster <armbru@pond.sub.org>"

* remotes/armbru/tags/pull-error-2015-02-18:
qemu-char: Avoid qerror_report_err() outside QMP command handlers
qemu-img: Avoid qerror_report_err() outside QMP command handlers
vl: Avoid qerror_report_err() outside QMP command handlers
tpm: Avoid qerror_report_err() outside QMP command handlers
numa: Avoid qerror_report_err() outside QMP command handlers
net: Avoid qerror_report_err() outside QMP command handlers
monitor: Avoid qerror_report_err() outside QMP command handlers
monitor: Clean up around monitor_handle_fd_param()
error: Use error_report_err() where appropriate
error: New convenience function error_report_err()
vhost-scsi: Improve error reporting for invalid vhostfd

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

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hmp: Name HMP info handler functions hmp_info_SUBCOMMAND()

Some are called do_info_SUBCOMMAND() (old ones, usually), some
hmp_info_SUBCOMMAND(), some SUBCOMMAND_info(), sometimes SUBCOMMAND
pointles

hmp: Name HMP info handler functions hmp_info_SUBCOMMAND()

Some are called do_info_SUBCOMMAND() (old ones, usually), some
hmp_info_SUBCOMMAND(), some SUBCOMMAND_info(), sometimes SUBCOMMAND
pointlessly differs in spelling.

Normalize to hmp_info_SUBCOMMAND(), where SUBCOMMAND is exactly the
subcommand name with '-' replaced by '_'.

Exceptions:

* sun4m_irq_info(), sun4m_pic_info() renamed to sun4m_hmp_info_irq(),
sun4m_hmp_info_pic().

* lm32_irq_info(), lm32_pic_info() renamed to lm32_hmp_info_irq(),
lm32_hmp_info_pic().

Signed-off-by: Markus Armbruster <armbru@redhat.com>

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monitor: Clean up around monitor_handle_fd_param()

monitor_handle_fd_param() is a wrapper around
monitor_handle_fd_param2() that feeds errors to qerror_report_err()
instead of returning them. qerro

monitor: Clean up around monitor_handle_fd_param()

monitor_handle_fd_param() is a wrapper around
monitor_handle_fd_param2() that feeds errors to qerror_report_err()
instead of returning them. qerror_report_err() is inappropriate in
many contexts. monitor_handle_fd_param() looks simpler than
monitor_handle_fd_param2(), which tempts use. Remove the temptation:
drop the wrapper and open-code the (trivial) error handling instead.

Replace the open-coded qerror_report_err() by error_report_err() in
places that already use error_report(). Turns out that's everywhere.

While there, rename monitor_handle_fd_param2() to monitor_fd_param().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>

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block: Rename BlockDriverCompletionFunc to BlockCompletionFunc

I'll use it with block backends shortly, and the name is going to fit
badly there. It's a block layer thing anyway, not just a block d

block: Rename BlockDriverCompletionFunc to BlockCompletionFunc

I'll use it with block backends shortly, and the name is going to fit
badly there. It's a block layer thing anyway, not just a block driver
thing.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

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