Mao Zhongyi [Fri, 21 Sep 2018 02:05:30 +0000 (22:05 -0400)]
Drop "qemu:" prefix from error_report() arguments
error_report and friends already add a "qemu-system-xxx" prefix
to the string, so a "qemu:" prefix is redundant in the string.
Just drop it.
Reported-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Mao Zhongyi <maozhongyi@cmss.chinamobile.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <
1537495530-580-1-git-send-email-maozhongyi@cmss.chinamobile.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Cornelia Huck [Thu, 30 Aug 2018 14:59:02 +0000 (16:59 +0200)]
qemu-error: make use of {error, warn}_report_once_cond
{error,warn}_report_once() are a special case of the new functions
and can simply switch to them.
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <
20180830145902.27376-3-cohuck@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Dispense with unlikely() to keep the macros as simple as possible]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Cornelia Huck [Thu, 30 Aug 2018 14:59:01 +0000 (16:59 +0200)]
qemu-error: add {error, warn}_report_once_cond
Add two functions to print an error/warning report once depending
on a passed-in condition variable and flip it if printed. This is
useful if you want to print a message not once-globally, but e.g.
once-per-device.
Inspired by warn_once() in hw/vfio/ccw.c, which has been replaced
with warn_report_once_cond().
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <
20180830145902.27376-2-cohuck@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Function comments reworded]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Peter Maydell [Mon, 24 Sep 2018 13:35:58 +0000 (14:35 +0100)]
Merge remote-tracking branch 'remotes/xanclic/tags/pull-block-2018-08-31-v2' into staging
Block patches:
- (Block) job exit refactoring, part 1
(removing job_defer_to_main_loop())
- test-bdrv-drain leak fix
# gpg: Signature made Fri 31 Aug 2018 15:30:33 BST
# gpg: using RSA key
F407DB0061D5CF40
# gpg: Good signature from "Max Reitz <mreitz@redhat.com>"
# Primary key fingerprint: 91BE B60A 30DB 3E88 57D1 1829 F407 DB00 61D5 CF40
* remotes/xanclic/tags/pull-block-2018-08-31-v2:
jobs: remove job_defer_to_main_loop
jobs: remove ret argument to job_completed; privatize it
block/backup: make function variables consistently named
jobs: utilize job_exit shim
block/mirror: utilize job_exit shim
block/commit: utilize job_exit shim
jobs: add exit shim
jobs: canonize Error object
jobs: change start callback to run callback
tests: fix bdrv-drain leak
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Peter Maydell [Mon, 24 Sep 2018 13:04:40 +0000 (14:04 +0100)]
Revert "tests: add qmp/qom-set-without-value test"
Markus spotted some issues with this new test case which
unfortunately I didn't notice had been flagged until after
I'd applied the pull request. Revert the relevant commit.
This reverts commit
2b70ea92766f5a1a735a44e28c92cdfba3c4054f.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Peter Maydell [Mon, 24 Sep 2018 12:28:38 +0000 (13:28 +0100)]
Merge remote-tracking branch 'remotes/mcayland/tags/qemu-openbios.for-upstream-
20180831' into staging
qemu-openbios.for-upstream queue
# gpg: Signature made Fri 31 Aug 2018 12:26:55 BST
# gpg: using RSA key
5BC2C56FAE0F321F
# gpg: Good signature from "Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>"
# Primary key fingerprint: CC62 1AB9 8E82 200D 915C C9C4 5BC2 C56F AE0F 321F
* remotes/mcayland/tags/qemu-openbios.for-upstream-
20180831:
Update OpenBIOS images to
a1280807 built from submodule.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Peter Maydell [Mon, 24 Sep 2018 11:28:36 +0000 (12:28 +0100)]
Merge remote-tracking branch 'remotes/huth-gitlab/tags/pull-request-2018-08-31' into staging
Removal of deprecated options and improvements for the qtests
# gpg: Signature made Fri 31 Aug 2018 09:10:23 BST
# gpg: using RSA key
2ED9D774FE702DB5
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>"
# gpg: aka "Thomas Huth <thuth@redhat.com>"
# gpg: aka "Thomas Huth <huth@tuxfamily.org>"
# gpg: aka "Thomas Huth <th.huth@posteo.de>"
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3 EAB9 2ED9 D774 FE70 2DB5
* remotes/huth-gitlab/tags/pull-request-2018-08-31:
tests: add a qmp success-response test
tests: add qmp/qom-set-without-value test
tests: add qmp/object-add-without-props test
tests: add qmp_assert_error_class()
tests/libqos: Utilize newer glib spawn check
net: Remove the deprecated -tftp, -bootp, -redir and -smb options
Remove the deprecated options -startdate, -localtime and -rtc-td-hack
Remove the deprecated -nodefconfig option
Remove the deprecated -balloon option
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Peter Maydell [Mon, 24 Sep 2018 10:43:00 +0000 (11:43 +0100)]
Merge remote-tracking branch 'remotes/cohuck/tags/s390x-
20180829' into staging
- various fixes and improvements in the tcg code
- split off the individual virtio-ccw devices into separate files
# gpg: Signature made Wed 29 Aug 2018 10:38:03 BST
# gpg: using RSA key
DECF6B93C6F02FAF
# gpg: Good signature from "Cornelia Huck <conny@cornelia-huck.de>"
# gpg: aka "Cornelia Huck <huckc@linux.vnet.ibm.com>"
# gpg: aka "Cornelia Huck <cornelia.huck@de.ibm.com>"
# gpg: aka "Cornelia Huck <cohuck@kernel.org>"
# gpg: aka "Cornelia Huck <cohuck@redhat.com>"
# Primary key fingerprint: C3D0 D66D C362 4FF6 A8C0 18CE DECF 6B93 C6F0 2FAF
* remotes/cohuck/tags/s390x-
20180829:
target/s390x: use regular spaces in translate.c
hw/s390x: Move virtio-ccw-blk code to a separate file
hw/s390x: Move virtio-ccw-net code to a separate file
hw/s390x: Move virtio-ccw-input code to a separate file
hw/s390x: Move virtio-ccw-gpu code to a separate file
hw/s390x: Move vhost-vsock-ccw code to a separate file
hw/s390x: Move virtio-ccw-crypto code to a separate file
hw/s390x: Move virtio-ccw-9p code to a separate file
hw/s390x: Move virtio-ccw-rng code to a separate file
hw/s390x: Move virtio-ccw-scsi code to a separate file
hw/s390x: Move virtio-ccw-balloon code to a separate file
hw/s390x: Move virtio-ccw-serial code to a separate file
hw/s390x/virtio-ccw: Consolidate calls to virtio_ccw_unrealize()
target/s390x: fix PACK reading 1 byte less and writing 1 byte more
target/s390x: add EX support for TRT and TRTR
target/s390x: fix IPM polluting irrelevant bits
target/s390x: fix CSST decoding and runtime alignment check
target/s390x: add BAL and BALR instructions
tests/tcg: add a simple s390x test
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Peter Maydell [Mon, 24 Sep 2018 09:46:33 +0000 (10:46 +0100)]
Merge remote-tracking branch 'remotes/armbru/tags/pull-qapi-2018-08-28' into staging
QAPI patches for 2018-08-28
# gpg: Signature made Tue 28 Aug 2018 17:23:32 BST
# gpg: using RSA key
3870B400EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg: aka "Markus Armbruster <armbru@pond.sub.org>"
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867 4E5F 3870 B400 EB91 8653
* remotes/armbru/tags/pull-qapi-2018-08-28:
qapi: Add comments to aid debugging generated introspection
qapi: Minor introspect.py cleanups
qapi: Update docs for generator changes since commit
9ee86b85267
qapi: Emit a blank line before dummy declaration
qapi: Drop qapi_event_send_FOO()'s Error ** argument
qapi: Fix build_params() for empty parameter list
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
John Snow [Thu, 30 Aug 2018 01:57:34 +0000 (21:57 -0400)]
jobs: remove job_defer_to_main_loop
Now that the job infrastructure is handling the job_completed call for
all implemented jobs, we can remove the interface that allowed jobs to
schedule their own completion.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id:
20180830015734.19765-10-jsnow@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
John Snow [Thu, 30 Aug 2018 01:57:33 +0000 (21:57 -0400)]
jobs: remove ret argument to job_completed; privatize it
Jobs are now expected to return their retcode on the stack, from the
.run callback, so we can remove that argument.
job_cancel does not need to set -ECANCELED because job_completed will
update the return code itself if the job was canceled.
While we're here, make job_completed static to job.c and remove it from
job.h; move the documentation of return code to the .run() callback and
to the job->ret property, accordingly.
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id:
20180830015734.19765-9-jsnow@redhat.com
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
John Snow [Thu, 30 Aug 2018 01:57:32 +0000 (21:57 -0400)]
block/backup: make function variables consistently named
Rename opaque_job to job to be consistent with other job implementations.
Rename 'job', the BackupBlockJob object, to 's' to also be consistent.
Suggested-by: Eric Blake <eblake@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id:
20180830015734.19765-8-jsnow@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
John Snow [Thu, 30 Aug 2018 01:57:31 +0000 (21:57 -0400)]
jobs: utilize job_exit shim
Utilize the job_exit shim by not calling job_defer_to_main_loop, and
where applicable, converting the deferred callback into the job_exit
callback.
This converts backup, stream, create, and the unit tests all at once.
Most of these jobs do not see any changes to the order in which they
clean up their resources, except the test-blockjob-txn test, which
now puts down its bs before job_completed is called.
This is safe for the same reason the reordering in the mirror job is
safe, because job_completed no longer runs under two locks, making
the unref safe even if it causes a flush.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id:
20180830015734.19765-7-jsnow@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
John Snow [Thu, 30 Aug 2018 01:57:30 +0000 (21:57 -0400)]
block/mirror: utilize job_exit shim
Change the manual deferment to mirror_exit into the implicit
callback to job_exit and the mirror_exit callback.
This does change the order of some bdrv_unref calls and job_completed,
but thanks to the new context in which we call .exit, this is safe to
defer the possible flushing of any nodes to the job_finalize_single
cleanup stage.
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id:
20180830015734.19765-6-jsnow@redhat.com
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
John Snow [Thu, 30 Aug 2018 01:57:29 +0000 (21:57 -0400)]
block/commit: utilize job_exit shim
Change the manual deferment to commit_complete into the implicit
callback to job_exit, renaming commit_complete to commit_exit.
This conversion does change the timing of when job_completed is
called to after the bdrv_replace_node and bdrv_unref calls, which
could have implications for bjob->blk which will now be put down
after this cleanup.
Kevin highlights that we did not take any permissions for that backend
at job creation time, so it is safe to reorder these operations.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id:
20180830015734.19765-5-jsnow@redhat.com
Reviewed-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
John Snow [Thu, 30 Aug 2018 01:57:28 +0000 (21:57 -0400)]
jobs: add exit shim
All jobs do the same thing when they leave their running loop:
- Store the return code in a structure
- wait to receive this structure in the main thread
- signal job completion via job_completed
Few jobs do anything beyond exactly this. Consolidate this exit
logic for a net reduction in SLOC.
More seriously, when we utilize job_defer_to_main_loop_bh to call
a function that calls job_completed, job_finalize_single will run
in a context where it has recursively taken the aio_context lock,
which can cause hangs if it puts down a reference that causes a flush.
You can observe this in practice by looking at mirror_exit's careful
placement of job_completed and bdrv_unref calls.
If we centralize job exiting, we can signal job completion from outside
of the aio_context, which should allow for job cleanup code to run with
only one lock, which makes cleanup callbacks less tricky to write.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id:
20180830015734.19765-4-jsnow@redhat.com
Reviewed-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
John Snow [Thu, 30 Aug 2018 01:57:27 +0000 (21:57 -0400)]
jobs: canonize Error object
Jobs presently use both an Error object in the case of the create job,
and char strings in the case of generic errors elsewhere.
Unify the two paths as just j->err, and remove the extra argument from
job_completed. The integer error code for job_completed is kept for now,
to be removed shortly in a separate patch.
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id:
20180830015734.19765-3-jsnow@redhat.com
[mreitz: Dropped a superfluous g_strdup()]
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
John Snow [Thu, 30 Aug 2018 01:57:26 +0000 (21:57 -0400)]
jobs: change start callback to run callback
Presently we codify the entry point for a job as the "start" callback,
but a more apt name would be "run" to clarify the idea that when this
function returns we consider the job to have "finished," except for
any cleanup which occurs in separate callbacks later.
As part of this clarification, change the signature to include an error
object and a return code. The error ptr is not yet used, and the return
code while captured, will be overwritten by actions in the job_completed
function.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id:
20180830015734.19765-2-jsnow@redhat.com
Reviewed-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Marc-André Lureau [Thu, 9 Aug 2018 11:44:15 +0000 (13:44 +0200)]
tests: fix bdrv-drain leak
Spotted by ASAN:
=================================================================
==5378==ERROR: LeakSanitizer: detected memory leaks
Direct leak of 65536 byte(s) in 1 object(s) allocated from:
#0 0x7f788f83bc48 in malloc (/lib64/libasan.so.5+0xeec48)
#1 0x7f788c9923c5 in g_malloc (/lib64/libglib-2.0.so.0+0x523c5)
#2 0x5622a1fe37bc in coroutine_trampoline /home/elmarco/src/qq/util/coroutine-ucontext.c:116
#3 0x7f788a15d75f in __correctly_grouped_prefixwc (/lib64/libc.so.6+0x4c75f)
(Broken in commit
4c8158e359d.)
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id:
20180809114417.28718-3-marcandre.lureau@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
Mark Cave-Ayland [Fri, 31 Aug 2018 11:19:07 +0000 (12:19 +0100)]
Update OpenBIOS images to
a1280807 built from submodule.
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Marc-André Lureau [Thu, 30 Aug 2018 15:58:10 +0000 (17:58 +0200)]
tests: add a qmp success-response test
Verify the usage of this schema feature and the API behaviour. This
should be the only case where qmp_dispatch() returns NULL.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Marc-André Lureau [Thu, 30 Aug 2018 15:58:09 +0000 (17:58 +0200)]
tests: add qmp/qom-set-without-value test
test_qom_set_without_value() is about a bug in infrastructure used by
the QMP core, fixed in commit
c489780203. We covered the bug in
infrastructure unit tests (commit
bce3035a44). I wrote that test
earlier, to cover QMP level as well, the test could go into qmp-test.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Marc-André Lureau [Thu, 30 Aug 2018 15:58:08 +0000 (17:58 +0200)]
tests: add qmp/object-add-without-props test
test_object_add_without_props() tests a bug in qmp_object_add() we
fixed in commit
e64c75a975. Sadly, we don't have systematic
object-add tests. This lone test can go into qmp-cmd-test for want of
a better home.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Marc-André Lureau [Thu, 30 Aug 2018 15:58:07 +0000 (17:58 +0200)]
tests: add qmp_assert_error_class()
This helper will simplify a bunch of code checking for QMP errors and
can be shared by various tests. Note that test-qga does check for
error description as well, so don't replace the code there for now.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Eric Blake [Tue, 21 Aug 2018 19:05:16 +0000 (14:05 -0500)]
tests/libqos: Utilize newer glib spawn check
During development, I got a 'make check' failure that claimed:
qemu-img returned status code 32512
**
ERROR:tests/libqos/libqos.c:202:mkimg: assertion failed: (!rc)
But 32512 is too big for a normal exit status value, which means we
failed to use WEXITSTATUS() to shift the bits to the desired value
for printing. However, instead of worrying about how to portably
parse g_spawn()'s rc in the proper platform-dependent manner, it's
better to just rely on the fact that we now require glib 2.40 (since
commit
e7b3af815) and can therefore use glib's portable checker
instead, where the message under my same condition improves to:
Child process exited with code 127
**
ERROR:tests/libqos/libqos.c:192:mkimg: assertion failed: (ret && !err)
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Thomas Huth [Wed, 22 Aug 2018 13:43:30 +0000 (15:43 +0200)]
net: Remove the deprecated -tftp, -bootp, -redir and -smb options
These options likely do not work as expected as soon as the user
tries to use more than one network interface at once. The parameters
have been marked as deprecated since QEMU v2.6, so users had plenty
of time to move their scripts to the new syntax. Time to remove the
old parameters now.
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Acked-by: Peter Krempa <pkrempa@redhat.com>
Acked-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Thomas Huth [Tue, 21 Aug 2018 13:18:06 +0000 (15:18 +0200)]
Remove the deprecated options -startdate, -localtime and -rtc-td-hack
Deprecated since two releases, nobody complained, thus it's time to
remove them now.
Acked-by: Peter Krempa <pkrempa@redhat.com>
Acked-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Thomas Huth [Tue, 21 Aug 2018 10:59:56 +0000 (12:59 +0200)]
Remove the deprecated -nodefconfig option
It's the same as -no-user-config and marked as deprecated since three
releases already. Time to remove it now.
Acked-by: Peter Krempa <pkrempa@redhat.com>
Acked-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Thomas Huth [Tue, 21 Aug 2018 09:58:47 +0000 (11:58 +0200)]
Remove the deprecated -balloon option
The "-balloon" option has been replaced by "-device virtio-balloon".
It's been marked as deprecated since two releases, and nobody
complained, so let's remove it now.
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Peter Krempa <pkrempa@redhat.com>
Acked-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Eric Blake [Mon, 27 Aug 2018 21:39:43 +0000 (16:39 -0500)]
qapi: Add comments to aid debugging generated introspection
We consciously chose in commit
1a9a507b to hide QAPI type names
from the introspection output on the wire, but added a command
line option -u to unmask the type name when doing a debug build.
The unmask option still remains useful to some other forms of
automated analysis, so it will not be removed; however, when it
is not in use, the generated .c file can be hard to read. At
the time when we first introduced masking, the generated file
consisted only of a monolithic C string, so there was no clean
way to inject any comments.
Later, in commit
7d0f982b, we switched the generation to output
a QLit object, in part to make it easier for future addition of
conditional compilation. In fact, commit
d626b6c1 took advantage
of this by passing a tuple instead of a bare object for encoding
the output of conditionals. By extending that tuple, we can now
interject strategic comments.
For now, type name debug aid comments are only output once per
meta-type, rather than at all uses of the number used to encode
the type within the introspection data. But this is still a lot
more convenient than having to regenerate the file with the
unmask operation temporarily turned on - merely search the
generated file for '"NNN" =' to learn the corresponding source
name and associated definition of type NNN.
The generated qapi-introspect.c changes only with the addition
of comments, such as:
| @@ -14755,6 +15240,7 @@
| { "name", QLIT_QSTR("[485]"), },
| {}
| })),
| + /* "485" = QCryptoBlockInfoLUKSSlot */
| QLIT_QDICT(((QLitDictEntry[]) {
| { "members", QLIT_QLIST(((QLitObject[]) {
| QLIT_QDICT(((QLitDictEntry[]) {
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180827213943.33524-3-eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Rebased, update to qapi-code-gen.txt corrected]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Eric Blake [Mon, 27 Aug 2018 21:39:42 +0000 (16:39 -0500)]
qapi: Minor introspect.py cleanups
Commit
7d0f982b changed generated introspection output to no longer
produce long lines in the generated .c file, but failed to adjust
comments to match. Add some clarity that the shorter length that
matters most is the overall QMP response on the wire.
Commit
25b1ef31 triggers a pep8 formatting nit.
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180827213943.33524-2-eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Markus Armbruster [Tue, 28 Aug 2018 12:07:36 +0000 (14:07 +0200)]
qapi: Update docs for generator changes since commit
9ee86b85267
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <
20180828120736.32323-3-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Markus Armbruster [Tue, 28 Aug 2018 12:07:35 +0000 (14:07 +0200)]
qapi: Emit a blank line before dummy declaration
We emit a dummy variable in each .c file "to shut up OSX toolchain
warnings about empty .o files" (commit
252dc3105fc). Separate it from
the code preceding it (if any) with a blank line.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <
20180828120736.32323-2-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Peter Xu [Wed, 15 Aug 2018 13:37:37 +0000 (21:37 +0800)]
qapi: Drop qapi_event_send_FOO()'s Error ** argument
The generated qapi_event_send_FOO() take an Error ** argument. They
can't actually fail, because all they do with the argument is passing it
to functions that can't fail: the QObject output visitor, and the
@qmp_emit callback, which is either monitor_qapi_event_queue() or
event_test_emit().
Drop the argument, and pass &error_abort to the QObject output visitor
and @qmp_emit instead.
Suggested-by: Eric Blake <eblake@redhat.com>
Suggested-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <
20180815133747.25032-4-peterx@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Commit message rewritten, update to qapi-code-gen.txt corrected]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Markus Armbruster [Wed, 15 Aug 2018 13:37:36 +0000 (21:37 +0800)]
qapi: Fix build_params() for empty parameter list
build_params() returns '' instead of 'void' when there are no
parameters. Can't happen now, but the next commit will change that.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
[peterx: compose the patch from email replies]
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <
20180815133747.25032-3-peterx@redhat.com>
Pavel Zbitskiy [Wed, 22 Aug 2018 14:40:37 +0000 (10:40 -0400)]
target/s390x: use regular spaces in translate.c
In a few places translate.c contains non-breaking spaces (0xc2 0xa0)
instead of regular ones (0x20):
7c 7c c2 a0 63 63
7c 7c 20 63 63
| | c c
This confuses some text editors.
Signed-off-by: Pavel Zbitskiy <pavel.zbitskiy@gmail.com>
Message-Id: <
20180822144039.5796-2-pavel.zbitskiy@gmail.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Thomas Huth [Wed, 25 Jul 2018 18:08:30 +0000 (20:08 +0200)]
hw/s390x: Move virtio-ccw-blk code to a separate file
The code should only be enabled if CONFIG_VIRTIO_BLK has been set.
This can be done best if the code resides in a separate file.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <
1532542110-9017-1-git-send-email-thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Thomas Huth [Wed, 25 Jul 2018 18:07:36 +0000 (20:07 +0200)]
hw/s390x: Move virtio-ccw-net code to a separate file
The code should only be enabled if CONFIG_VIRTIO_NET has been set.
This can be done best if the code resides in a separate file.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <
1532542056-8927-1-git-send-email-thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Thomas Huth [Wed, 25 Jul 2018 12:20:24 +0000 (14:20 +0200)]
hw/s390x: Move virtio-ccw-input code to a separate file
The code should only be enabled if CONFIG_VIRTIO_INPUT has been set.
This can be done best if the code resides in a separate file.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <
1532521224-27235-11-git-send-email-thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Thomas Huth [Wed, 25 Jul 2018 12:20:23 +0000 (14:20 +0200)]
hw/s390x: Move virtio-ccw-gpu code to a separate file
The code should only be enabled if CONFIG_VIRTIO_GPU has been set. This
can be done best if the code resides in a separate file.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <
1532521224-27235-10-git-send-email-thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Thomas Huth [Wed, 25 Jul 2018 12:20:22 +0000 (14:20 +0200)]
hw/s390x: Move vhost-vsock-ccw code to a separate file
The code should only be enabled if CONFIG_VHOST_VSOCK has been set.
This can be done best if the code resides in a separate file.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <
1532521224-27235-9-git-send-email-thuth@redhat.com>
[CH: updated MAINTAINERS]
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Thomas Huth [Wed, 25 Jul 2018 12:20:21 +0000 (14:20 +0200)]
hw/s390x: Move virtio-ccw-crypto code to a separate file
The code should only be enabled if CONFIG_VIRTIO_CRYPTO has been set.
This can be done best if the code resides in a separate file.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <
1532521224-27235-8-git-send-email-thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Thomas Huth [Wed, 25 Jul 2018 12:20:20 +0000 (14:20 +0200)]
hw/s390x: Move virtio-ccw-9p code to a separate file
The code should only be enabled if CONFIG_VIRTIO_9P and CONFIG_VIRTFS
have been set. This can be done best if the code resides in a separate
file.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <
1532521224-27235-7-git-send-email-thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Thomas Huth [Wed, 25 Jul 2018 12:20:19 +0000 (14:20 +0200)]
hw/s390x: Move virtio-ccw-rng code to a separate file
The code should only be enabled if CONFIG_VIRTIO_RNG has been set.
This can be done best if the code resides in a separate file.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <
1532521224-27235-6-git-send-email-thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Thomas Huth [Wed, 25 Jul 2018 12:20:18 +0000 (14:20 +0200)]
hw/s390x: Move virtio-ccw-scsi code to a separate file
The code should only be enabled if CONFIG_VIRTIO_SCSI has been set.
This can be done best if the code resides in a separate file.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <
1532521224-27235-5-git-send-email-thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Thomas Huth [Wed, 25 Jul 2018 12:20:17 +0000 (14:20 +0200)]
hw/s390x: Move virtio-ccw-balloon code to a separate file
The code should only be enabled if CONFIG_VIRTIO_BALLOON has been
set. This can be done best if the code resides in a separate file.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <
1532521224-27235-4-git-send-email-thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Thomas Huth [Wed, 25 Jul 2018 12:20:16 +0000 (14:20 +0200)]
hw/s390x: Move virtio-ccw-serial code to a separate file
The code should only be enabled if CONFIG_VIRTIO_SERIAL has been set.
This can be done best if the code resides in a separate file.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <
1532521224-27235-3-git-send-email-thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Thomas Huth [Wed, 25 Jul 2018 12:20:15 +0000 (14:20 +0200)]
hw/s390x/virtio-ccw: Consolidate calls to virtio_ccw_unrealize()
Currently, every virtio-ccw device explicitely sets its unrealize
function to virtio_ccw_unrealize() in its class_init function.
We can simplify this by using a common unrealize function, just like
it is already done for the realize functions.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <
1532521224-27235-2-git-send-email-thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Pavel Zbitskiy [Tue, 21 Aug 2018 02:51:03 +0000 (22:51 -0400)]
target/s390x: fix PACK reading 1 byte less and writing 1 byte more
PACK fails on the test from the Principles of Operation:
F1F2F3F4
becomes
0000234C instead of
0001234C due to an off-by-one error.
Furthermore, it overwrites one extra byte to the left of F1.
If len_dest is 0, then we only want to flip the 1st byte and never loop
over the rest. Therefore, the loop condition should be > and not >=.
If len_src is 1, then we should flip the 1st byte and pack the 2nd.
Since len_src is already decremented before the loop, the first
condition should be >=, and not >.
Likewise for len_src == 2 and the second condition.
Signed-off-by: Pavel Zbitskiy <pavel.zbitskiy@gmail.com>
Message-Id: <
20180821025104.19604-7-pavel.zbitskiy@gmail.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Pavel Zbitskiy [Tue, 21 Aug 2018 02:51:02 +0000 (22:51 -0400)]
target/s390x: add EX support for TRT and TRTR
Improves "
b213c9f5: target/s390x: Implement TRTR" by introducing the
intermediate functions, which are compatible with dx_helper type.
Signed-off-by: Pavel Zbitskiy <pavel.zbitskiy@gmail.com>
Message-Id: <
20180821025104.19604-6-pavel.zbitskiy@gmail.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Pavel Zbitskiy [Tue, 21 Aug 2018 02:51:01 +0000 (22:51 -0400)]
target/s390x: fix IPM polluting irrelevant bits
Suppose psw.mask=0x0000000080000000, cc=2, r1=0 and we do "ipm 1".
This command must touch only bits 32-39, so the expected output
is r1=0x20000000. However, currently qemu yields r1=0x20008000,
because irrelevant parts of PSW leak into r1 during program mask
transfer.
Signed-off-by: Pavel Zbitskiy <pavel.zbitskiy@gmail.com>
Message-Id: <
20180821025104.19604-5-pavel.zbitskiy@gmail.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Pavel Zbitskiy [Tue, 21 Aug 2018 02:51:00 +0000 (22:51 -0400)]
target/s390x: fix CSST decoding and runtime alignment check
CSST is defined as:
C(0xc802, CSST, SSF, CASS, la1, a2, 0, 0, csst, 0)
It means that the first parameter is handled by in1_la1().
in1_la1() fills addr1 field, and not in1.
Furthermore, when extract32() is used for the alignment check, the
third parameter should specify the number of trailing bits that must
be 0. For FC these numbers are:
FC=0 (word, 4 bytes): 2
FC=1 (double word, 8 bytes): 3
FC=2 (quad word, 16 bytes): 4
For SC these numbers correspond to the size:
SC=0: 0
SC=1: 1
SC=2: 2
SC=3: 3
SC=4: 4
Signed-off-by: Pavel Zbitskiy <pavel.zbitskiy@gmail.com>
Message-Id: <
20180821025104.19604-4-pavel.zbitskiy@gmail.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Pavel Zbitskiy [Tue, 21 Aug 2018 02:50:59 +0000 (22:50 -0400)]
target/s390x: add BAL and BALR instructions
These instructions are provided for compatibility purposes and are
used only by old software, in the new code BAS and BASR are preferred.
The difference between the old and new instruction exists only in the
24-bit mode.
In addition, fix BAS polluting high 32 bits of the first operand in
24- and 31-bit addressing modes.
Signed-off-by: Pavel Zbitskiy <pavel.zbitskiy@gmail.com>
Message-Id: <
20180821025104.19604-3-pavel.zbitskiy@gmail.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Pavel Zbitskiy [Tue, 21 Aug 2018 02:50:58 +0000 (22:50 -0400)]
tests/tcg: add a simple s390x test
Copied from alpha.
Signed-off-by: Pavel Zbitskiy <pavel.zbitskiy@gmail.com>
Message-Id: <
20180821025104.19604-2-pavel.zbitskiy@gmail.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Peter Maydell [Mon, 27 Aug 2018 15:44:20 +0000 (16:44 +0100)]
Merge remote-tracking branch 'remotes/armbru/tags/pull-error-2018-08-27-v2' into staging
Error reporting patches for 2018-08-27
# gpg: Signature made Mon 27 Aug 2018 14:18:15 BST
# gpg: using RSA key
3870B400EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg: aka "Markus Armbruster <armbru@pond.sub.org>"
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867 4E5F 3870 B400 EB91 8653
* remotes/armbru/tags/pull-error-2018-08-27-v2:
intel-iommu: replace more vtd_err_* traces
intel-iommu: start to use error_report_once
qemu-error: introduce {error|warn}_report_once
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Peter Maydell [Mon, 27 Aug 2018 13:55:57 +0000 (14:55 +0100)]
Merge remote-tracking branch 'remotes/juanquintela/tags/check/
20180827' into staging
check/next for
20180827
# gpg: Signature made Mon 27 Aug 2018 10:58:51 BST
# gpg: using RSA key
F487EF185872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>"
# gpg: aka "Juan Quintela <quintela@trasno.org>"
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03 4B82 F487 EF18 5872 D723
* remotes/juanquintela/tags/check/
20180827:
check: Move wdt_ib700 test to common
check: Move endianess test to common
check: Move VMXNET3 test to common
check: Only test boot-serial when sga is compiled in
check: Only test ivshm when it is compiled in
x86_64-softmmu: Configuration is identical to i386-softmmu
check: Only test usb-xhci-nec when it is compiled in
check: Only test isa-testdev when it is compiled in
configure: We don't want to clean configuration files
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Peter Xu [Wed, 15 Aug 2018 09:53:28 +0000 (17:53 +0800)]
intel-iommu: replace more vtd_err_* traces
Replace all the trace_vtd_err_*() hooks with the new error_report_once()
since they are similar to trace_vtd_err() - dumping the first error
would be mostly enough, then we have them on by default too.
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <
20180815095328.32414-4-peterx@redhat.com>
[Use "%x" instead of "%" PRIx16 to print uint16_t, whitespace tidied up]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Peter Xu [Wed, 15 Aug 2018 09:53:27 +0000 (17:53 +0800)]
intel-iommu: start to use error_report_once
Replace existing trace_vtd_err() with error_report_once() then stderr
will capture something if any of the error happens, meanwhile we don't
suffer from any DDOS. Then remove the trace point. Since at it,
provide more information where proper (now we can pass parameters into
the report function).
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <
20180815095328.32414-3-peterx@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
[Two format strings fixed, whitespace tidied up]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Peter Maydell [Mon, 27 Aug 2018 11:30:51 +0000 (12:30 +0100)]
Merge remote-tracking branch 'remotes/kraxel/tags/ui-
20180827-v4-pull-request' into staging
ui: misc fixes which piled up during 3.0 release freeze
# gpg: Signature made Mon 27 Aug 2018 09:53:07 BST
# gpg: using RSA key
4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg: aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg: aka "Gerd Hoffmann (private) <kraxel@gmail.com>"
# Primary key fingerprint: A032 8CFF B93A 17A7 9901 FE7D 4CB6 D8EE D3E8 7138
* remotes/kraxel/tags/ui-
20180827-v4-pull-request:
util: promote qemu_egl_rendernode_open() to libqemuutil
dmabuf: add y0_top, pass it to spice
ui/vnc: Remove useless parenthesis around DIV_ROUND_UP macro
ui/sdl2: Fix broken -full-screen CLI option
spice-display: fix qemu_spice_cursor_refresh_bh locking
spice-display: access ptr_x/ptr_y under Mutex
vnc: remove support for deprecated tls, x509, x509verify options
doc: switch to modern syntax for VNC TLS setup
sdl2: redraw correctly when scanout_mode enabled.
ui: use enum to string helpers
vnc: fix memleak of the "vnc-worker-output" name
ui/sdl2: Remove the obsolete SDL_INIT_NOPARACHUTE flag
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Juan Quintela [Tue, 14 Aug 2018 12:11:34 +0000 (14:11 +0200)]
check: Move wdt_ib700 test to common
It is protected by CONFIG_WDT_IB700.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Juan Quintela [Tue, 14 Aug 2018 12:09:32 +0000 (14:09 +0200)]
check: Move endianess test to common
It is already protected by CONFIG_ISA_TESTDEV in all architectures.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Juan Quintela [Tue, 14 Aug 2018 12:07:22 +0000 (14:07 +0200)]
check: Move VMXNET3 test to common
We protect it with CONFIG_VMXNET3_PCI now, so no need to also put it
on i386.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Juan Quintela [Mon, 13 Aug 2018 11:01:42 +0000 (13:01 +0200)]
check: Only test boot-serial when sga is compiled in
This is only for x86* architecture.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Juan Quintela [Tue, 10 Jul 2018 21:39:01 +0000 (23:39 +0200)]
check: Only test ivshm when it is compiled in
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Juan Quintela [Tue, 31 Jul 2018 15:38:14 +0000 (17:38 +0200)]
x86_64-softmmu: Configuration is identical to i386-softmmu
If we ever changed that, just make the things that are different
explicit.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Juan Quintela [Tue, 10 Jul 2018 21:07:09 +0000 (23:07 +0200)]
check: Only test usb-xhci-nec when it is compiled in
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Juan Quintela [Tue, 10 Jul 2018 14:52:36 +0000 (16:52 +0200)]
check: Only test isa-testdev when it is compiled in
Once there, untangle endianness-test and boot-serial-test.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
---
boot-serial-test don't depend on isa-testdev. Thanks Thomas.
Juan Quintela [Mon, 16 Jul 2018 08:41:30 +0000 (10:41 +0200)]
configure: We don't want to clean configuration files
If you don't want to compile everything, you configure
config-devices.mak. And then make clean remove it, and make will
create a default one without your configuration. Fix it by not
removing it on clean target. Remove it instead on distclean.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
---
Remove it instead on distclean.
Marc-André Lureau [Fri, 13 Jul 2018 13:09:06 +0000 (15:09 +0200)]
util: promote qemu_egl_rendernode_open() to libqemuutil
vhost-user-gpu will share the same code to open a DRM node.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <
20180713130916.4153-20-marcandre.lureau@redhat.com>
[ kraxel: buildfix: util/drm.o must be CONFIG_OPENGL not CONFIG_LINUX ]
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Peter Xu [Wed, 15 Aug 2018 09:53:26 +0000 (17:53 +0800)]
qemu-error: introduce {error|warn}_report_once
There are many error_report()s that can be used in frequently called
functions, especially on IO paths. That can be unideal in that
malicious guest can try to trigger the error tons of time which might
use up the log space on the host (e.g., libvirt can capture the stderr
of QEMU and put it persistently onto disk). In VT-d emulation code, we
have trace_vtd_error() tracer. AFAIU all those places can be replaced
by something like error_report() but trace points are mostly used to
avoid the DDOS attack that mentioned above. However using trace points
mean that errors are not dumped if trace not enabled.
It's not a big deal in most modern server managements since we have
things like logrotate to maintain the logs and make sure the quota is
expected. However it'll still be nice that we just provide another way
to restrict message generations. In most cases, this kind of
error_report()s will only provide valid information on the first message
sent, and all the rest of similar messages will be mostly talking about
the same thing. This patch introduces *_report_once() helpers to allow
a message to be dumped only once during one QEMU process's life cycle.
It will make sure: (1) it's on by deffault, so we can even get something
without turning the trace on and reproducing, and (2) it won't be
affected by DDOS attack.
To implement it, I stole the printk_once() macro from Linux.
CC: Eric Blake <eblake@redhat.com>
CC: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <
20180815095328.32414-2-peterx@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Whitespace adjusted, comments improved]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Peter Maydell [Sat, 25 Aug 2018 12:08:57 +0000 (13:08 +0100)]
Merge remote-tracking branch 'remotes/otubo/tags/pull-seccomp-
20180823' into staging
pull-seccomp-
20180823
# gpg: Signature made Thu 23 Aug 2018 15:46:13 BST
# gpg: using RSA key
DF32E7C0F0FFF9A2
# gpg: Good signature from "Eduardo Otubo (Senior Software Engineer) <otubo@redhat.com>"
# Primary key fingerprint: D67E 1B50 9374 86B4 0723 DBAB DF32 E7C0 F0FF F9A2
* remotes/otubo/tags/pull-seccomp-
20180823:
seccomp: set the seccomp filter to all threads
configure: require libseccomp 2.2.0
seccomp: prefer SCMP_ACT_KILL_PROCESS if available
seccomp: use SIGSYS signal instead of killing the thread
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Peter Maydell [Sat, 25 Aug 2018 09:59:06 +0000 (10:59 +0100)]
Merge remote-tracking branch 'remotes/awilliam/tags/vfio-fixes-
20180823.1' into staging
VFIO fixes 2018-08-23
- Fix coverity reported issue with use of realpath (Alex Williamson)
- Cleanup file descriptor in error path (Alex Williamson)
- Fix postcopy use of new balloon inhibitor (Alex Williamson)
# gpg: Signature made Thu 23 Aug 2018 17:46:41 BST
# gpg: using RSA key
239B9B6E3BB08B22
# gpg: Good signature from "Alex Williamson <alex.williamson@redhat.com>"
# gpg: aka "Alex Williamson <alex@shazbot.org>"
# gpg: aka "Alex Williamson <alwillia@redhat.com>"
# gpg: aka "Alex Williamson <alex.l.williamson@gmail.com>"
# Primary key fingerprint: 42F6 C04E 540B D1A9 9E7B 8A90 239B 9B6E 3BB0 8B22
* remotes/awilliam/tags/vfio-fixes-
20180823.1:
postcopy: Synchronize usage of the balloon inhibitor
vfio/pci: Fix failure to close file descriptor on error
vfio/pci: Handle subsystem realpath() returning NULL
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Peter Maydell [Sat, 25 Aug 2018 09:11:54 +0000 (10:11 +0100)]
Merge remote-tracking branch 'remotes/armbru/tags/pull-qobject-2018-08-24' into staging
QObject patches for 2018-08-24
# gpg: Signature made Fri 24 Aug 2018 20:28:53 BST
# gpg: using RSA key
3870B400EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg: aka "Markus Armbruster <armbru@pond.sub.org>"
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867 4E5F 3870 B400 EB91 8653
* remotes/armbru/tags/pull-qobject-2018-08-24: (58 commits)
json: Update references to RFC 7159 to RFC 8259
json: Support %% in JSON strings when interpolating
json: Improve safety of qobject_from_jsonf_nofail() & friends
json: Keep interpolation state in JSONParserContext
tests/drive_del-test: Fix harmless JSON interpolation bug
json: Clean up headers
qobject: Drop superfluous includes of qemu-common.h
json: Make JSONToken opaque outside json-parser.c
json: Unbox tokens queue in JSONMessageParser
json: Streamline json_message_process_token()
json: Enforce token count and size limits more tightly
qjson: Have qobject_from_json() & friends reject empty and blank
json: Assert json_parser_parse() consumes all tokens on success
json: Fix streamer not to ignore trailing unterminated structures
json: Fix latent parser aborts at end of input
qjson: Fix qobject_from_json() & friends for multiple values
json: Improve names of lexer states related to numbers
json: Replace %I64d, %I64u by %PRId64, %PRIu64
json: Leave rejecting invalid interpolation to parser
json: Pass lexical errors and limit violations to callback
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Peter Maydell [Fri, 24 Aug 2018 22:10:15 +0000 (23:10 +0100)]
Merge remote-tracking branch 'remotes/amarkovic/tags/mips-queue-aug-2018' into staging
MIPS queue August 2018 v6
# gpg: Signature made Fri 24 Aug 2018 16:52:27 BST
# gpg: using RSA key
D4972A8967F75A65
# gpg: Good signature from "Aleksandar Markovic <amarkovic@wavecomp.com>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 8526 FBF1 5DA3 811F 4A01 DD75 D497 2A89 67F7 5A65
* remotes/amarkovic/tags/mips-queue-aug-2018: (45 commits)
target/mips: Add definition of nanoMIPS I7200 CPU
mips_malta: Fix semihosting argument passing for nanoMIPS bare metal
mips_malta: Add setting up GT64120 BARs to the nanoMIPS bootloader
mips_malta: Add basic nanoMIPS boot code for Malta board
elf: Don't check FCR31_NAN2008 bit for nanoMIPS
elf: On elf loading, treat both EM_MIPS and EM_NANOMIPS as legal for MIPS
elf: Relax MIPS' elf_check_arch() to accept EM_NANOMIPS too
elf: Add EM_NANOMIPS value as a valid one for e_machine field
target/mips: Fix ERET/ERETNC behavior related to ADEL exception
target/mips: Add updating BadInstr and BadInstrX for nanoMIPS
target/mips: Add availability control via bit NMS
target/mips: Add emulation of DSP ASE for nanoMIPS - part 6
target/mips: Add emulation of DSP ASE for nanoMIPS - part 5
target/mips: Add emulation of DSP ASE for nanoMIPS - part 4
target/mips: Add emulation of DSP ASE for nanoMIPS - part 3
target/mips: Add emulation of DSP ASE for nanoMIPS - part 2
target/mips: Add emulation of DSP ASE for nanoMIPS - part 1
target/mips: Implement MT ASE support for nanoMIPS
target/mips: Fix pre-nanoMIPS MT ASE instructions availability control
target/mips: Add emulation of nanoMIPS 32-bit branch instructions
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Markus Armbruster [Thu, 23 Aug 2018 16:40:25 +0000 (18:40 +0200)]
json: Update references to RFC 7159 to RFC 8259
RFC 8259 (December 2017) obsoletes RFC 7159 (March 2014).
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <
20180823164025.12553-59-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:24 +0000 (18:40 +0200)]
json: Support %% in JSON strings when interpolating
The previous commit makes JSON strings containing '%' awkward to
express in templates: you'd have to mask the '%' with an Unicode
escape \u0025. No template currently contains such JSON strings.
Support the printf conversion specification %% in JSON strings as a
convenience anyway, because it's trivially easy to do.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-58-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:23 +0000 (18:40 +0200)]
json: Improve safety of qobject_from_jsonf_nofail() & friends
The JSON parser optionally supports interpolation. This is used to
build QObjects by parsing string templates. The templates are C
literals, so parse errors (such as invalid interpolation
specifications) are actually programming errors. Consequently, the
functions providing parsing with interpolation
(qobject_from_jsonf_nofail(), qobject_from_vjsonf_nofail(),
qdict_from_jsonf_nofail(), qdict_from_vjsonf_nofail()) pass
&error_abort to the parser.
However, there's another, more dangerous kind of programming error:
since we use va_arg() to get the value to interpolate, behavior is
undefined when the variable argument isn't consistent with the
interpolation specification.
The same problem exists with printf()-like functions, and the solution
is to have the compiler check consistency. This is what
GCC_FMT_ATTR() is about.
To enable this type checking for interpolation as well, we carefully
chose our interpolation specifications to match printf conversion
specifications, and decorate functions parsing templates with
GCC_FMT_ATTR().
Note that this only protects against undefined behavior due to type
errors. It can't protect against use of invalid interpolation
specifications that happen to be valid printf conversion
specifications.
However, there's still a gaping hole in the type checking: GCC
recognizes '%' as start of printf conversion specification anywhere in
the template, but the parser recognizes it only outside JSON strings.
For instance, if someone were to pass a "{ '%s': %d }" template, GCC
would require a char * and an int argument, but the parser would
va_arg() only an int argument, resulting in undefined behavior.
Avoid undefined behavior by catching the programming error at run
time: have the parser recognize and reject '%' in JSON strings.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-57-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:22 +0000 (18:40 +0200)]
json: Keep interpolation state in JSONParserContext
The recursive descent parser passes along a pointer to
JSONParserContext. It additionally passes a pointer to interpolation
state (a va_alist *) as needed to reach its consumer
parse_interpolation().
Stuffing the latter pointer into JSONParserContext saves us the
trouble of passing it along, so do that.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-56-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:21 +0000 (18:40 +0200)]
tests/drive_del-test: Fix harmless JSON interpolation bug
test_after_failed_device_add() does this:
response = qmp("{'execute': 'device_add',"
" 'arguments': {"
" 'driver': 'virtio-blk-%s',"
" 'drive': 'drive0'"
"}}", qvirtio_get_dev_type());
Wrong. An interpolation specification must be a JSON token, it
doesn't work within JSON string tokens. The code above doesn't use
the value of qvirtio_get_dev_type(), and sends arguments
{"driver": "virtio-blk-%s", "drive": "drive0"}}
The command fails because there is no driver named "virtio-blk-%".
Harmless, since the test wants the command to fail. Screwed up in
commit
2f84a92ec63.
Fix the obvious way. The command now fails because the drive is
empty, like it did before commit
2f84a92ec63.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-55-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:20 +0000 (18:40 +0200)]
json: Clean up headers
The JSON parser has three public headers, json-lexer.h, json-parser.h,
json-streamer.h. They all contain stuff that is of no interest
outside qobject/json-*.c.
Collect the public interface in include/qapi/qmp/json-parser.h, and
everything else in qobject/json-parser-int.h.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-54-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:19 +0000 (18:40 +0200)]
qobject: Drop superfluous includes of qemu-common.h
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-53-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:18 +0000 (18:40 +0200)]
json: Make JSONToken opaque outside json-parser.c
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-52-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:17 +0000 (18:40 +0200)]
json: Unbox tokens queue in JSONMessageParser
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-51-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:16 +0000 (18:40 +0200)]
json: Streamline json_message_process_token()
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-50-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:15 +0000 (18:40 +0200)]
json: Enforce token count and size limits more tightly
Token count and size limits exist to guard against excessive heap
usage. We check them only after we created the token on the heap.
That's assigning a cowboy to the barn to lasso the horse after it has
bolted. Close the barn door instead: check before we create the
token.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-49-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:14 +0000 (18:40 +0200)]
qjson: Have qobject_from_json() & friends reject empty and blank
The last case where qobject_from_json() & friends return null without
setting an error is empty or blank input. Callers:
* block.c's parse_json_protocol() reports "Could not parse the JSON
options". It's marked as a work-around, because it also covered
actual bugs, but they got fixed in the previous few commits.
* qobject_input_visitor_new_str() reports "JSON parse error". Also
marked as work-around. The recent fixes have made this unreachable,
because it currently gets called only for input starting with '{'.
* check-qjson.c's empty_input() and blank_input() demonstrate the
behavior.
* The other callers are not affected since they only pass input with
exactly one JSON value or, in the case of negative tests, one error.
Fail with "Expecting a JSON value" instead of returning null, and
simplify callers.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-48-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:13 +0000 (18:40 +0200)]
json: Assert json_parser_parse() consumes all tokens on success
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-47-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:12 +0000 (18:40 +0200)]
json: Fix streamer not to ignore trailing unterminated structures
json_message_process_token() accumulates tokens until it got the
sequence of tokens that comprise a single JSON value (it counts curly
braces and square brackets to decide). It feeds those token sequences
to json_parser_parse(). If a non-empty sequence of tokens remains at
the end of the parse, it's silently ignored. check-qjson.c cases
unterminated_array(), unterminated_array_comma(), unterminated_dict(),
unterminated_dict_comma() demonstrate this bug.
Fix as follows. Introduce a JSON_END_OF_INPUT token. When the
streamer receives it, it feeds the accumulated tokens to
json_parser_parse().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-46-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:11 +0000 (18:40 +0200)]
json: Fix latent parser aborts at end of input
json-parser.c carefully reports end of input like this:
token = parser_context_pop_token(ctxt);
if (token == NULL) {
parse_error(ctxt, NULL, "premature EOI");
goto out;
}
Except parser_context_pop_token() can't return null, it fails its
assertion instead. Same for parser_context_peek_token(). Broken in
commit
65c0f1e9558, and faithfully preserved in commit
95385fe9ace.
Only a latent bug, because the streamer throws away any input that
could trigger it.
Drop the assertions, so we can fix the streamer in the next commit.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-45-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:10 +0000 (18:40 +0200)]
qjson: Fix qobject_from_json() & friends for multiple values
qobject_from_json() & friends use the consume_json() callback to
receive either a value or an error from the parser.
When they are fed a string that contains more than either one JSON
value or one JSON syntax error, consume_json() gets called multiple
times.
When the last call receives a value, qobject_from_json() returns that
value. Any other values are leaked.
When any call receives an error, qobject_from_json() sets the first
error received. Any other errors are thrown away.
When values follow errors, qobject_from_json() returns both a value
and sets an error. That's bad. Impact:
* block.c's parse_json_protocol() ignores and leaks the value. It's
used to to parse pseudo-filenames starting with "json:". The
pseudo-filenames can come from the user or from image meta-data such
as a QCOW2 image's backing file name.
* vl.c's parse_display_qapi() ignores and leaks the error. It's used
to parse the argument of command line option -display.
* vl.c's main() case QEMU_OPTION_blockdev ignores the error and leaves
it in @err. main() will then pass a pointer to a non-null Error *
to net_init_clients(), which is forbidden. It can lead to assertion
failure or other misbehavior.
* check-qjson.c's multiple_values() demonstrates the badness.
* The other callers are not affected since they only pass strings with
exactly one JSON value or, in the case of negative tests, one
error.
The impact on the _nofail() functions is relatively harmless. They
abort when any call receives an error. Else they return the last
value, and leak the others, if any.
Fix consume_json() as follows. On the first call, save value and
error as before. On subsequent calls, if any, don't save them. If
the first call saved a value, the next call, if any, replaces the
value by an "Expecting at most one JSON value" error. Take care not
to leak values or errors that aren't saved.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-44-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:09 +0000 (18:40 +0200)]
json: Improve names of lexer states related to numbers
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-43-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:08 +0000 (18:40 +0200)]
json: Replace %I64d, %I64u by %PRId64, %PRIu64
Support for %I64d got added in commit
2c0d4b36e7f "json: fix PRId64 on
Win32". We had to hard-code I64d because we used the lexer's finite
state machine to check interpolations. No more, so clean this up.
Additional conversion specifications would be easy enough to implement
when needed.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-42-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:07 +0000 (18:40 +0200)]
json: Leave rejecting invalid interpolation to parser
Both lexer and parser reject invalid interpolation specifications.
The parser's check is useless.
The lexer ends the token right after the first bad character. This
tends to lead to suboptimal error reporting. For instance, input
[ %04d ]
produces the tokens
JSON_LSQUARE [
JSON_ERROR %0
JSON_INTEGER 4
JSON_KEYWORD d
JSON_RSQUARE ]
The parser then yields an error, an object and two more errors:
error: Invalid JSON syntax
object: 4
error: JSON parse error, invalid keyword
error: JSON parse error, expecting value
Dumb down the lexer to accept [A-Za-z0-9]*. The parser's check is now
used. Emit a proper error there.
The lexer now produces
JSON_LSQUARE [
JSON_INTERP %04d
JSON_RSQUARE ]
and the parser reports just
JSON parse error, invalid interpolation '%04d'
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-41-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:06 +0000 (18:40 +0200)]
json: Pass lexical errors and limit violations to callback
The callback to consume JSON values takes QObject *json, Error *err.
If both are null, the callback is supposed to make up an error by
itself. This sucks.
qjson.c's consume_json() neglects to do so, which makes
qobject_from_json() null instead of failing. I consider that a bug.
The culprit is json_message_process_token(): it passes two null
pointers when it runs into a lexical error or a limit violation. Fix
it to pass a proper Error object then. Update the callbacks:
* monitor.c's handle_qmp_command(): the code to make up an error is
now dead, drop it.
* qga/main.c's process_event(): lumps the "both null" case together
with the "not a JSON object" case. The former is now gone. The
error message "Invalid JSON syntax" is misleading for the latter.
Improve it to "Input must be a JSON object".
* qobject/qjson.c's consume_json(): no update; check-qjson
demonstrates qobject_from_json() now sets an error on lexical
errors, but still doesn't on some other errors.
* tests/libqtest.c's qmp_response(): the Error object is now reliable,
so use it to improve the error message.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-40-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:05 +0000 (18:40 +0200)]
json: Treat unwanted interpolation as lexical error
The JSON parser optionally supports interpolation. The lexer
recognizes interpolation tokens unconditionally. The parser rejects
them when interpolation is disabled, in parse_interpolation().
However, it neglects to set an error then, which can make
json_parser_parse() fail without setting an error.
Move the check for unwanted interpolation from the parser's
parse_interpolation() into the lexer's finite state machine. When
interpolation is disabled, '%' is now handled like any other
unexpected character.
The next commit will improve how such lexical errors are handled.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-39-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:04 +0000 (18:40 +0200)]
json: Rename token JSON_ESCAPE & friends to JSON_INTERP
The JSON parser optionally supports interpolation. The code calls it
"escape". Awkward, because it uses the same term for escape sequences
within strings. The latter usage is consistent with RFC 8259 "The
JavaScript Object Notation (JSON) Data Interchange Format" and ISO C.
Call the former "interpolation" instead.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-38-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:03 +0000 (18:40 +0200)]
json: Don't create JSON_ERROR tokens that won't be used
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-37-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:02 +0000 (18:40 +0200)]
json: Don't pass null @tokens to json_parser_parse()
json_parser_parse() normally returns the QObject on success. Except
it returns null when its @tokens argument is null.
Its only caller json_message_process_token() passes null @tokens when
emitting a lexical error. The call is a rather opaque way to say json
= NULL then.
Simplify matters by lifting the assignment to json out of the emit
path: initialize json to null, set it to the value of
json_parser_parse() when there's no lexical error. Drop the special
case from json_parser_parse().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-36-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:01 +0000 (18:40 +0200)]
json: Redesign the callback to consume JSON values
The classical way to structure parser and lexer is to have the client
call the parser to get an abstract syntax tree, the parser call the
lexer to get the next token, and the lexer call some function to get
input characters.
Another way to structure them would be to have the client feed
characters to the lexer, the lexer feed tokens to the parser, and the
parser feed abstract syntax trees to some callback provided by the
client. This way is more easily integrated into an event loop that
dispatches input characters as they arrive.
Our JSON parser is kind of between the two. The lexer feeds tokens to
a "streamer" instead of a real parser. The streamer accumulates
tokens until it got the sequence of tokens that comprise a single JSON
value (it counts curly braces and square brackets to decide). It
feeds those token sequences to a callback provided by the client. The
callback passes each token sequence to the parser, and gets back an
abstract syntax tree.
I figure it was done that way to make a straightforward recursive
descent parser possible. "Get next token" becomes "pop the first
token off the token sequence". Drawback: we need to store a complete
token sequence. Each token eats 13 + input characters + malloc
overhead bytes.
Observations:
1. This is not the only way to use recursive descent. If we replaced
"get next token" by a coroutine yield, we could do without a
streamer.
2. The lexer reports errors by passing a JSON_ERROR token to the
streamer. This communicates the offending input characters and
their location, but no more.
3. The streamer reports errors by passing a null token sequence to the
callback. The (already poor) lexical error information is thrown
away.
4. Having the callback receive a token sequence duplicates the code to
convert token sequence to abstract syntax tree in every callback.
5. Known bug: the streamer silently drops incomplete token sequences.
This commit rectifies 4. by lifting the call of the parser from the
callbacks into the streamer. Later commits will address 3. and 5.
The lifting removes a bug from qjson.c's parse_json(): it passed a
pointer to a non-null Error * in certain cases, as demonstrated by
check-qjson.c.
json_parser_parse() is now unused. It's a stupid wrapper around
json_parser_parse_err(). Drop it, and rename json_parser_parse_err()
to json_parser_parse().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-35-armbru@redhat.com>
Markus Armbruster [Thu, 23 Aug 2018 16:40:00 +0000 (18:40 +0200)]
json: Have lexer call streamer directly
json_lexer_init() takes the function to process a token as an
argument. It's always json_message_process_token(). Makes the code
harder to understand for no actual gain. Drop the indirection.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <
20180823164025.12553-34-armbru@redhat.com>