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* qmp: Call monitor_set_cur() only in qmp_dispatch()Kevin Wolf2020-10-091-1/+1
| | | | | | | | | | | | The correct way to set the current monitor for a coroutine handler will be different than for a blocking handler, so monitor_set_cur() needs to be called in qmp_dispatch(). Signed-off-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20201005155855.256490-7-kwolf@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
* qga: relocate path to default configuration and hookPaolo Bonzini2020-09-301-3/+5
| | | | Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* meson: fix MSI ruleMarc-André Lureau2020-09-301-0/+1
| | | | | | | | | The environment variables can't be passed through an env: argument yet (meson#2723), use 'env' as suggested in: https://github.com/mesonbuild/meson/issues/2723#issuecomment-348630957 Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* qga/qapi-schema.json: Add some headingsPeter Maydell2020-09-291-3/+5
| | | | | | | | | | | | | | Add some section headings to the QGA json; this is purely so that we have some H1 headings, as otherwise each command ends up being visible in the interop/ manual's table of contents. In an ideal world there might be a proper 'Introduction' section the way there is in qapi/qapi-schema.json. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20200925162316.21205-12-peter.maydell@linaro.org> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
* docs/interop: Convert qemu-ga-ref to rSTPeter Maydell2020-09-291-2/+1Star
| | | | | | | | | | | | | | | | | | | | | | | Convert qemu-ga-ref to rST format. This includes dropping the plain-text, pdf and info format outputs for this document; as with all our other Sphinx-based documentation, we provide HTML and manpage only. The qemu-ga-ref.rst is somewhat more stripped down than the .texi was, because we do not (currently) attempt to generate indexes for the commands, events and data types being documented. As the GA ref is now part of the Sphinx 'interop' manual, we can delete the direct link from index.html.in. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20200925162316.21205-9-peter.maydell@linaro.org> Reviewed-by: Markus Armbruster <armbru@redhat.com> [Unicode legacy literal dumbed down to plain string literal, TODO comment on displaying QEMU version added] Signed-off-by: Markus Armbruster <armbru@redhat.com>
* qemu/atomic.h: rename atomic_ to qatomic_Stefan Hajnoczi2020-09-231-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | clang's C11 atomic_fetch_*() functions only take a C11 atomic type pointer argument. QEMU uses direct types (int, etc) and this causes a compiler error when a QEMU code calls these functions in a source file that also included <stdatomic.h> via a system header file: $ CC=clang CXX=clang++ ./configure ... && make ../util/async.c:79:17: error: address argument to atomic operation must be a pointer to _Atomic type ('unsigned int *' invalid) Avoid using atomic_*() names in QEMU's atomic.h since that namespace is used by <stdatomic.h>. Prefix QEMU's APIs with 'q' so that atomic.h and <stdatomic.h> can co-exist. I checked /usr/include on my machine and searched GitHub for existing "qatomic_" users but there seem to be none. This patch was generated using: $ git grep -h -o '\<atomic\(64\)\?_[a-z0-9_]\+' include/qemu/atomic.h | \ sort -u >/tmp/changed_identifiers $ for identifier in $(</tmp/changed_identifiers); do sed -i "s%\<$identifier\>%q$identifier%g" \ $(git grep -I -l "\<$identifier\>") done I manually fixed line-wrap issues and misaligned rST tables. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20200923105646.47864-1-stefanha@redhat.com>
* Merge remote-tracking branch ↵Peter Maydell2020-09-171-1/+4
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 'remotes/huth-gitlab/tags/pull-request-2020-09-16' into staging * Fix "readlink -f" problem in iotests on macOS (to fix the Cirrus-CI tests) * Some minor qtest improvements * Fix the unit tests to work on MSYS2, too * Enable building and testing on MSYS2 in the Cirrus-CI * Build FreeBSD with one task again in the Cirrus-CI # gpg: Signature made Wed 16 Sep 2020 12:24:29 BST # gpg: using RSA key 27B88847EEE0250118F3EAB92ED9D774FE702DB5 # gpg: issuer "thuth@redhat.com" # gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full] # gpg: aka "Thomas Huth <thuth@redhat.com>" [full] # gpg: aka "Thomas Huth <huth@tuxfamily.org>" [full] # gpg: aka "Thomas Huth <th.huth@posteo.de>" [unknown] # Primary key fingerprint: 27B8 8847 EEE0 2501 18F3 EAB9 2ED9 D774 FE70 2DB5 * remotes/huth-gitlab/tags/pull-request-2020-09-16: (24 commits) cirrus: Building freebsd in a single shot ci: Enable msys2 ci in cirrus tests: Fixes test-qdev-global-props.c tests: fix test-util-sockets.c tests: Fixes test-io-channel-file by mask only owner file state mask bits tests: fixes aio-win32 about aio_remove_fd_handler, get it consistence with aio-posix.c tests: Fixes test-io-channel-socket.c tests under msys2/mingw vmstate: Fixes test-vmstate.c on msys2/mingw meson: remove empty else and duplicated gio deps meson: Use -b to ignore CR vs. CR-LF issues on Windows osdep: file locking functions are not available on Win32 tests: test-replication disable /replication/secondary/* on msys2/mingw. tests: Fixes test-replication.c on msys2/mingw. meson: disable crypto tests are empty under win32 meson: Disable test-char on msys2/mingw for fixing tests stuck rcu: fixes test-logging.c by call drain_call_rcu before rmdir_full tests: Convert g_free to g_autofree macro in test-logging.c rcu: Implement drain_call_rcu qga/commands-win32: Fix problem with redundant protype declaration Simplify the .gitignore file ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| * qga/commands-win32: Fix problem with redundant protype declarationThomas Huth2020-09-161-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When compiling QEMU with MSYS2 on Windows, there is currently the following error: ../qga/commands-win32.c:62:24: error: redundant redeclaration of 'CM_Get_DevNode_PropertyW' [-Werror=redundant-decls] 62 | CMAPI CONFIGRET WINAPI CM_Get_DevNode_PropertyW( | ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from ../qga/commands-win32.c:26: C:/tools/msys64/mingw64/x86_64-w64-mingw32/include/cfgmgr32.h:840:26: note: previous declaration of 'CM_Get_DevNode_PropertyW' was here 840 | CMAPI CONFIGRET WINAPI CM_Get_DevNode_PropertyW(DEVINST dnDevInst, const DEVPROPKEY *PropertyKey, DEVPROPTYPE *PropertyType, PBYTE PropertyBuffer, PULONG PropertyBufferSize, ULONG ulFlags); Seems like this protype is sometimes available in the cfgmgr32.h header, and sometimes not. Let's silence the compiler warning here to let the build pass with -Werror, too. Message-Id: <20200915114757.55635-1-thuth@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
* | util: rename qemu_open() to qemu_open_old()Daniel P. Berrangé2020-09-162-5/+5
|/ | | | | | | | | | | We want to introduce a new version of qemu_open() that uses an Error object for reporting problems and make this it the preferred interface. Rename the existing method to release the namespace for the new impl. Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
* qga: add command guest-get-devices for reporting VirtIO devicesTomáš Golembiovský2020-09-133-1/+269
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add command for reporting devices on Windows guest. The intent is not so much to report the devices but more importantly the driver (and its version) that is assigned to the device. This gives caller the information whether VirtIO drivers are installed and/or whether inadequate driver is used on a device (e.g. QXL device with base VGA driver). Example: [ { "driver-date": "2019-08-12", "driver-name": "Red Hat VirtIO SCSI controller", "driver-version": "100.80.104.17300", "address": { "type": "pci", "data": { "device-id": 4162, "vendor-id": 6900 } } }, ... ] Signed-off-by: Tomáš Golembiovský <tgolembi@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> *remove redundant glib autoptr declaration for GuestDeviceInfo Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
* qga/commands-posix: Support fsinfo for non-PCI virtio devices, tooThomas Huth2020-09-131-1/+41
| | | | | | | | | | QEMU on s390x uses virtio via channel I/O instead of PCI by default. Add a function to detect and provide information for virtio-scsi and virtio-block devices here, too. Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
* qga/commands-posix: Move the udev code from the pci to the generic functionThomas Huth2020-09-131-29/+33
| | | | | | | | | | | The libudev-related code is independent from the other pci-related code and can be re-used for non-pci devices (like ccw devices on s390x). Thus move this part to the generic function. Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1755075 Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
* qga/commands-posix: Rework build_guest_fsinfo_for_real_device() functionThomas Huth2020-09-131-24/+41
| | | | | | | | | | We are going to support non-PCI devices soon. For this we need to split the generic GuestDiskAddress and GuestDiskAddressList memory allocation and list chaining into a separate function first. Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
* meson: install $localstatedir/run for qgaMarc-André Lureau2020-09-011-0/+2
| | | | | | Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20200826130622.553318-6-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* meson: build texi docPaolo Bonzini2020-08-211-3/+9
| | | | | Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* meson: convert dummy Windows qga/qemu-ga targetPaolo Bonzini2020-08-212-0/+6
| | | | Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* meson: add msi generationMarc-André Lureau2020-08-212-1/+27
| | | | | Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* meson: convert vss-win32Marc-André Lureau2020-08-214-24/+39
| | | | | Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* meson: convert qemu-gaPaolo Bonzini2020-08-213-10/+47
| | | | | Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* schemas: Add vim modelineAndrea Bolognani2020-08-031-0/+1
| | | | | | | | | | | | | | | | | | | | | | The various schemas included in QEMU use a JSON-based format which is, however, strictly speaking not valid JSON. As a consequence, when vim tries to apply syntax highlight rules for JSON (as guessed from the file name), the result is an unreadable mess which mostly consist of red markers pointing out supposed errors in, well, pretty much everything. Using Python syntax highlighting produces much better results, and in fact these files already start with specially-formatted comments that instruct Emacs to process them as if they were Python files. This commit adds the equivalent special comments for vim. Signed-off-by: Andrea Bolognani <abologna@redhat.com> Message-Id: <20200729185024.121766-1-abologna@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
* qga/qapi-schema: Document -1 for invalid PCI address fieldsThomas Huth2020-07-281-1/+1
| | | | | | | | | | | The "guest-get-fsinfo" could also be used for non-PCI devices in the future. And the code in GuestPCIAddress() in qga/commands-win32.c seems to be using "-1" for fields that it can not determine already. Thus let's properly document "-1" as value for invalid PCI address fields. Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
* qga-win: fix "guest-get-fsinfo" wrong filesystem typeBasil Salman2020-07-281-6/+23
| | | | | | | | | | | | | | | | | This patch handles the case where unmounted volumes exist, where in that case GetVolumePathNamesForVolumeName returns empty path, GetVolumeInformation will use the current working directory instead. This patch fixes the issue by opening a handle to the volumes, and using GetVolumeInformationByHandleW instead. Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1746667 Signed-off-by: Basil Salman <bsalman@redhat.com> Signed-off-by: Basil Salman <basil@daynix.com> *fix crash when guest_build_fsinfo() sets errp multiple times *make new error message more distinct from existing ones Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
* qga: Use qemu_get_host_name() instead of g_get_host_name()Michal Privoznik2020-07-141-4/+13
| | | | | | | | | | | | | | | | Problem with g_get_host_name() is that on the first call it saves the hostname into a global variable and from then on, every subsequent call returns the saved hostname. Even if the hostname changes. This doesn't play nicely with guest agent, because if the hostname is acquired before the guest is set up (e.g. on the first boot, or before DHCP) we will report old, invalid hostname. Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1845127 Signed-off-by: Michal Privoznik <mprivozn@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Cc: qemu-stable@nongnu.org Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
* qga: fix assert regression on guest-shutdownMarc-André Lureau2020-07-141-1/+5
| | | | | | | | | | | | | | | | | Since commit 781f2b3d1e ("qga: process_event() simplification"), send_response() is called unconditionally, but will assert when "rsp" is NULL. This may happen with QCO_NO_SUCCESS_RESP commands, such as "guest-shutdown". Fixes: 781f2b3d1e5ef389b44016a897fd55e7a780bf35 Cc: Michael Roth <mdroth@linux.vnet.ibm.com> Reported-by: Christian Ehrhardt <christian.ehrhardt@canonical.com> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Christian Ehrhardt <christian.ehrhardt@canonical.com> Tested-by: Christian Ehrhardt <christian.ehrhardt@canonical.com> Cc: qemu-stable@nongnu.org Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
* qga-win: Fix QGA VSS Provider service stop failureBasil Salman2020-07-141-13/+20
| | | | | | | | | | | | | | | | | On one hand "guest-fsfreeze-freeze" command, "COM+ System Application service" is stopped, on the other hand "guest-fsfreeze-thaw" stops QGA VSS Provider service from "COM+ Application Admin Catalog". Invoking a series of freeze and thaw commands may result in QGA failing to stop VSS Provider service as "COM+ System Application service" is stopped, which can cause some delay in qga response. In this commit StopService function was changed and VSS Provider service is now stopped using Winsvc library API. BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1549425 Signed-off-by: Basil Salman <bsalman@redhat.com> Signed-off-by: Basil Salman <basil@daynix.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
* error: Eliminate error_propagate() manuallyMarkus Armbruster2020-07-101-3/+1Star
| | | | | | | | | | | When all we do with an Error we receive into a local variable is propagating to somewhere else, we can just as well receive it there right away. The previous two commits did that for sufficiently simple cases with Coccinelle. Do it for several more manually. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20200707160613.848843-37-armbru@redhat.com>
* error: Eliminate error_propagate() with Coccinelle, part 1Markus Armbruster2020-07-101-2/+1Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When all we do with an Error we receive into a local variable is propagating to somewhere else, we can just as well receive it there right away. Convert if (!foo(..., &err)) { ... error_propagate(errp, err); ... return ... } to if (!foo(..., errp)) { ... ... return ... } where nothing else needs @err. Coccinelle script: @rule1 forall@ identifier fun, err, errp, lbl; expression list args, args2; binary operator op; constant c1, c2; symbol false; @@ if ( ( - fun(args, &err, args2) + fun(args, errp, args2) | - !fun(args, &err, args2) + !fun(args, errp, args2) | - fun(args, &err, args2) op c1 + fun(args, errp, args2) op c1 ) ) { ... when != err when != lbl: when strict - error_propagate(errp, err); ... when != err ( return; | return c2; | return false; ) } @rule2 forall@ identifier fun, err, errp, lbl; expression list args, args2; expression var; binary operator op; constant c1, c2; symbol false; @@ - var = fun(args, &err, args2); + var = fun(args, errp, args2); ... when != err if ( ( var | !var | var op c1 ) ) { ... when != err when != lbl: when strict - error_propagate(errp, err); ... when != err ( return; | return c2; | return false; | return var; ) } @depends on rule1 || rule2@ identifier err; @@ - Error *err = NULL; ... when != err Not exactly elegant, I'm afraid. The "when != lbl:" is necessary to avoid transforming if (fun(args, &err)) { goto out } ... out: error_propagate(errp, err); even though other paths to label out still need the error_propagate(). For an actual example, see sclp_realize(). Without the "when strict", Coccinelle transforms vfio_msix_setup(), incorrectly. I don't know what exactly "when strict" does, only that it helps here. The match of return is narrower than what I want, but I can't figure out how to express "return where the operand doesn't use @err". For an example where it's too narrow, see vfio_intx_enable(). Silently fails to convert hw/arm/armsse.c, because Coccinelle gets confused by ARMSSE being used both as typedef and function-like macro there. Converted manually. Line breaks tidied up manually. One nested declaration of @local_err deleted manually. Preexisting unwanted blank line dropped in hw/riscv/sifive_e.c. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20200707160613.848843-35-armbru@redhat.com>
* error: Avoid unnecessary error_propagate() after error_setg()Markus Armbruster2020-07-101-13/+6Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Replace error_setg(&err, ...); error_propagate(errp, err); by error_setg(errp, ...); Related pattern: if (...) { error_setg(&err, ...); goto out; } ... out: error_propagate(errp, err); return; When all paths to label out are that way, replace by if (...) { error_setg(errp, ...); return; } and delete the label along with the error_propagate(). When we have at most one other path that actually needs to propagate, and maybe one at the end that where propagation is unnecessary, e.g. foo(..., &err); if (err) { goto out; } ... bar(..., &err); out: error_propagate(errp, err); return; move the error_propagate() to where it's needed, like if (...) { foo(..., &err); error_propagate(errp, err); return; } ... bar(..., errp); return; and transform the error_setg() as above. In some places, the transformation results in obviously unnecessary error_propagate(). The next few commits will eliminate them. Bonus: the elimination of gotos will make later patches in this series easier to review. Candidates for conversion tracked down with this Coccinelle script: @@ identifier err, errp; expression list args; @@ - error_setg(&err, args); + error_setg(errp, args); ... when != err error_propagate(errp, err); Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20200707160613.848843-34-armbru@redhat.com>
* qga: Plug unlikely memory leak in guest-set-memory-blocksMarkus Armbruster2020-07-021-0/+1
| | | | | | | | | | | | | | | | | transfer_memory_block() leaks an Error object when reading file /sys/devices/system/memory/memory<INDEX>/state fails with errno other than ENOENT, and @sys2memblk is false, i.e. when the state file exists but cannot be read (seems quite unlikely), and this is guest-set-memory-blocks, not guest-get-memory-blocks. Plug the leak. Fixes: bd240fca42d5f072fb758a71720d9de9990ac553 Cc: Michael Roth <mdroth@linux.vnet.ibm.com> Cc: Hailiang Zhang <zhang.zhanghailiang@huawei.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: zhanghailiang <zhang.zhanghailiang@huawei.com> Message-Id: <20200630090351.1247703-9-armbru@redhat.com>
* qga: Fix qmp_guest_suspend_{disk, ram}() error handlingMarkus Armbruster2020-04-291-0/+14
| | | | | | | | | | | | | | | | | | | | The Error ** argument must be NULL, &error_abort, &error_fatal, or a pointer to a variable containing NULL. Passing an argument of the latter kind twice without clearing it in between is wrong: if the first call sets an error, it no longer points to NULL for the second qmp_guest_suspend_disk() and qmp_guest_suspend_ram() pass @local_err first to check_suspend_mode(), then to acquire_privilege(), then to execute_async(). Continuing after errors here can only end in tears. For instance, we risk tripping error_setv()'s assertion. Fixes: aa59637ea1c6a4c83430933f9c44c43e6c3f1b69 Fixes: f54603b6aa765514b2519e74114a2f417759d727 Cc: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20200422130719.28225-15-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* qga: Fix qmp_guest_get_memory_blocks() error handlingMarkus Armbruster2020-04-291-0/+3
| | | | | | | | | | | | | | | | | | | The Error ** argument must be NULL, &error_abort, &error_fatal, or a pointer to a variable containing NULL. Passing an argument of the latter kind twice without clearing it in between is wrong: if the first call sets an error, it no longer points to NULL for the second call. qmp_guest_get_memory_blocks() passes &local_err to transfer_memory_block() in a loop. If this fails in more than one iteration, it can trip error_setv()'s assertion. Fix it to break the loop. Cc: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20200422130719.28225-14-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
* qga: Restrict guest-file-read count to 48 MB to avoid crashesPhilippe Mathieu-Daudé2020-04-152-3/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | On [*] Daniel Berrangé commented: The QEMU guest agent protocol is not sensible way to access huge files inside the guest. It requires the inefficient process of reading the entire data into memory than duplicating it again in base64 format, and then copying it again in the JSON serializer / monitor code. For arbitrary general purpose file access, especially for large files, use a real file transfer program or use a network block device, not the QEMU guest agent. To avoid bug reports as BZ#1594054 (CVE-2018-12617), follow his suggestion to put a low, hard limit on "count" in the guest agent QAPI schema, and don't allow count to be larger than 48 MB. [*] https://www.mail-archive.com/qemu-devel@nongnu.org/msg693176.html Fixes: CVE-2018-12617 Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1594054 Reported-by: Fakhri Zulkifli <mohdfakhrizulkifli@gmail.com> Suggested-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> *update schema documentation to indicate 48MB limit instead of 10MB Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
* qga: Extract qmp_guest_file_read() to common commands.cPhilippe Mathieu-Daudé2020-04-154-36/+35Star
| | | | | | | Extract the common code shared by both POSIX/Win32 implementations. Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
* qga: Extract guest_file_handle_find() to commands-common.hPhilippe Mathieu-Daudé2020-04-153-6/+26
| | | | | | | | As we are going to reuse this method, declare it in common header. Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
* Revert "prevent crash when executing guest-file-read with large count"Philippe Mathieu-Daudé2020-04-151-7/+1Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As noted by Daniel Berrangé in [*], the fix from commit 807e2b6fce which replaced malloc() by try_malloc() is not enough, the process can still run out of memory a few line later: 346 buf = g_try_malloc0(count + 1); 347 if (!buf) { 348 error_setg(errp, 349 "failed to allocate sufficient memory " 350 "to complete the requested service"); 351 return NULL; 352 } 353 is_ok = ReadFile(fh, buf, count, &read_count, NULL); 354 if (!is_ok) { 355 error_setg_win32(errp, GetLastError(), "failed to read file"); 356 slog("guest-file-read failed, handle %" PRId64, handle); 357 } else { 358 buf[read_count] = 0; 359 read_data = g_new0(GuestFileRead, 1); ^^^^^^ Instead we are going to put a low hard limit on 'count' in the next commits. This reverts commit 807e2b6fce022707418bc8f61c069d91c613b3d2. [*] https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg03471.html Suggested-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
* qga/commands-posix: fix use after free of local_errVladimir Sementsov-Ogievskiy2020-04-041-0/+3
| | | | | | | | | | | local_err is used several times in guest_suspend(). Setting non-NULL local_err will crash, so let's zero it after freeing. Also fix possible leak of local_err in final if(). Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20200324153630.11882-7-vsementsov@virtuozzo.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Markus Armbruster <armbru@redhat.com>
* qemu-ga: document vsock-listen in the man pageStefan Hajnoczi2020-03-241-1/+3
| | | | | | | | | | | | | | Although qemu-ga has supported vsock since 2016 it was not documented on the man page. Also add the socket address representation to the qga --help output. Fixes: 586ef5dee77180fc32e33bc08051600030630239 ("qga: add vsock-listen method") Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
* qga: Fix undefined C behaviorEric Blake2020-03-241-2/+7
| | | | | | | | | | | | | | | The QAPI struct GuestFileWhence has a comment about how we are exploiting equivalent values between two different integer types shared in a union. But C says behavior is undefined on assignments to overlapping storage when the two types are not the same width, and indeed, 'int64_t value' and 'enum QGASeek name' are very likely to be different in width. Utilize a temporary variable to fix things. Reported-by: Peter Maydell <peter.maydell@linaro.org> Fixes: 0b4b49387 Fixes: Coverity CID 1421990 Signed-off-by: Eric Blake <eblake@redhat.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
* qga-win: prevent crash when executing guest-file-read with large countBasil Salman2020-03-241-1/+7
| | | | | | | | | | | | | | | | | | | guest-file-read command is currently implemented to read from a file handle count number of bytes. when executed with a very large count number qemu-ga crashes. after some digging turns out that qemu-ga crashes after trying to allocate a buffer large enough to save the data read in it, the buffer was allocated using g_malloc0 which is not fail safe, and results a crash in case of failure. g_malloc0 was replaced with g_try_malloc0() which returns NULL on failure, A check was added for that case in order to prevent qemu-ga from crashing and to send a response to the qemu-ga client accordingly. Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1594054 Signed-off-by: Basil Salman <basil@daynix.com> Reported-by: Fakhri Zulkifli <mohdfakhrizulkifli@gmail.com> Cc: qemu-stable@nongnu.org Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
* qga-win: Handle VSS_E_PROVIDER_ALREADY_REGISTERED errorSameeh Jubran2020-03-241-0/+11
| | | | | | | | | This patch handles the case where VSS Provider is already registered, where in such case qga uninstalls the provider and registers it again. Signed-off-by: Sameeh Jubran <sjubran@redhat.com> Signed-off-by: Basil Salman <basil@daynix.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
* qga: Installer: Wait for installation to finishBasil Salman2020-03-241-1/+1
| | | | | | | | | | Installation might fail if we don't wait for the provider unregisteration process to finish. Signed-off-by: Sameeh Jubran <sjubran@redhat.com> Signed-off-by: Basil Salman <basil@daynix.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
* qmp: constify QmpCommand and listMarc-André Lureau2020-03-172-4/+4
| | | | | | | | | | | Since 0b69f6f72ce47a37a749b056b6d5ec64c61f11e8 "qapi: remove qmp_unregister_command()", the command list can be declared const. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Damien Hedde <damien.hedde@greensocs.com> Message-Id: <20200316171824.2319695-1-marcandre.lureau@redhat.com> [Rebased] Signed-off-by: Markus Armbruster <armbru@redhat.com>
* qga: Fix a memory leakPhilippe Mathieu-Daudé2020-03-091-2/+2
| | | | | | | | | | The string returned by g_win32_error_message() has to be deallocated with g_free(). Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200228100726.8414-5-philmd@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
* qga: Improve error report by calling error_setg_win32()Philippe Mathieu-Daudé2020-03-092-4/+7
| | | | | | | | | Use error_setg_win32() which adds a hint similar to strerror(errno)). Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200228100726.8414-4-philmd@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
* qga/qapi-schema.json: minor format fixups for rSTPeter Maydell2020-02-151-43/+51
| | | | | | | | | | | | | | | | | | | | | | | | | | | We would like to switch the doc comments to rST format, and rST requires a blank line before the start of a bulleted or enumerated list. Two places in qapi-schema.json were missing this blank line. Some places were using an indented line as a sort of single-item bulleted list, which in the Texinfo output comes out all run onto a single line; use a real bulleted list instead. Some places unnecessarily indented lists, which confuses rST. guest-fstrim:minimum's documentation was indented the right amount to share a line with @minimum, but wasn't actually doing so. The indent on the bulleted list in the guest-set-vcpus Returns section meant rST misindented it. Changes to the generated Texinfo are very minor (the new bulleted lists, and a few extra blank lines). Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20200213175647.17628-7-peter.maydell@linaro.org> [Commit message tweaked] Signed-off-by: Markus Armbruster <armbru@redhat.com>
* qga/qapi-schema.json: Fix indent level on doc commentsPeter Maydell2020-02-151-31/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current doc generation doesn't care much about indentation levels, but we would like to switch to an rST format, and rST does care about indentation. Make the doc comments more strongly consistent about indentation for multiline constructs like: @arg: description line 1 description line 2 Returns: line one line 2 so that there is always exactly one space after the colon, and subsequent lines align with the first. This commit is a purely whitespace change, and it does not alter the generated .texi files (because the texi generation code strips away all the extra whitespace). This does mean that we end up with some over-length lines. Note that when the documentation for an argument fits on a single line like this: @arg: one line only then stray extra spaces after the ':' don't affect the rST output, so I have not attempted to methodically fix them, though the preference is a single space here too. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20200213175647.17628-6-peter.maydell@linaro.org> [Commit message tweaked] Signed-off-by: Markus Armbruster <armbru@redhat.com>
* qga/qapi-schema.json: Fix missing '-' in GuestDiskBusType doc commentPeter Maydell2020-02-151-1/+1
| | | | | | | | | | | | | | | | | | | The doc comment for GuestDiskBusType doesn't match up with the enumeration because of a missing hyphen in 'file-backed-virtual'. This means the docs are rendered wrongly: "virtual" Win virtual bus type "file-backed" virtual: Win file-backed bus type "file-backed-virtual" Not documented Add the missing hyphen. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20200213175647.17628-5-peter.maydell@linaro.org> Signed-off-by: Markus Armbruster <armbru@redhat.com>
* build-sys: clean up flags included in the linker command linePaolo Bonzini2020-01-241-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Some of the CFLAGS that are discovered during configure, for example compiler warnings, are being included on the linker command line because QEMU_CFLAGS is added to it. Other flags, such as the -m32, appear twice because they are included in both QEMU_CFLAGS and LDFLAGS. All this leads to confusion with respect to what goes in which Makefile variables (and we have plenty). So, introduce QEMU_LDFLAGS for flags discovered by configure, following the lead of QEMU_CFLAGS, and stop adding to it: 1) options that are already in CFLAGS, for example "-g" 2) duplicate options At the same time, options that _are_ needed by both compiler and linker must now be added to both QEMU_CFLAGS and QEMU_LDFLAGS, which is clearer. This is mostly -fsanitize options. For now, --extra-cflags has this behavior (but --extra-cxxflags does not). Meson will not include CFLAGS on the linker command line, do the same in our build system as well. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* qapi: Generate command registration stuff into separate filesMarkus Armbruster2020-01-142-1/+2
| | | | | | | | | | | | Having to include qapi-commands.h just for qmp_init_marshal() is suboptimal. Generate it into separate files. This lets monitor/misc.c, qga/main.c, and the generated qapi-commands-FOO.h include less. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20191120182551.23795-4-armbru@redhat.com> [Typos in docs/devel/qapi-code-gen.txt fixed] Reviewed-by: Eric Blake <eblake@redhat.com>
* qga: rename Error ** parameter to more common errpVladimir Sementsov-Ogievskiy2019-12-183-8/+8
| | | | | | | | Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20191205174635.18758-13-vsementsov@virtuozzo.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
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