[libvirt] [PATCH 0/4] Couple more hotplug cleanups
Patches speak for themselves - they also resolve a couple of new Coverity whines. John Ferlan (4): conf,qemu: Check for NULL addrs in virDomainUSBAddressRelease conf,qemu: Check for NULL addrs in virDomainUSBAddressEnsure qemu: Remove unnecessary virtio disk detach info.alias check qemu: Remove unnecessary controller detach info.alias check src/conf/domain_addr.c | 5 ++++- src/conf/domain_addr.h | 4 ++-- src/qemu/qemu_domain_address.c | 7 ++----- src/qemu/qemu_hotplug.c | 43 ++++++++++++++---------------------------- 4 files changed, 22 insertions(+), 37 deletions(-) -- 2.13.6
Rather than having the caller check, if the input @addrs is NULL (e.g. priv->usbaddrs), then just return 0. Signed-off-by: John Ferlan <jferlan@redhat.com> --- src/conf/domain_addr.c | 2 +- src/conf/domain_addr.h | 2 +- src/qemu/qemu_domain_address.c | 7 ++----- src/qemu/qemu_hotplug.c | 10 +++------- 4 files changed, 7 insertions(+), 14 deletions(-) diff --git a/src/conf/domain_addr.c b/src/conf/domain_addr.c index 6422682391..a44f964701 100644 --- a/src/conf/domain_addr.c +++ b/src/conf/domain_addr.c @@ -2177,7 +2177,7 @@ virDomainUSBAddressRelease(virDomainUSBAddressSetPtr addrs, int targetPort; int ret = -1; - if (info->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_USB || + if (!addrs || info->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_USB || !virDomainUSBAddressPortIsValid(info->addr.usb.port)) return 0; diff --git a/src/conf/domain_addr.h b/src/conf/domain_addr.h index 1731014656..7565322bd2 100644 --- a/src/conf/domain_addr.h +++ b/src/conf/domain_addr.h @@ -330,5 +330,5 @@ virDomainUSBAddressEnsure(virDomainUSBAddressSetPtr addrs, int virDomainUSBAddressRelease(virDomainUSBAddressSetPtr addrs, virDomainDeviceInfoPtr info) - ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2); + ATTRIBUTE_NONNULL(2); #endif /* __DOMAIN_ADDR_H__ */ diff --git a/src/qemu/qemu_domain_address.c b/src/qemu/qemu_domain_address.c index 7f4ac0f45a..7d2e2e75d9 100644 --- a/src/qemu/qemu_domain_address.c +++ b/src/qemu/qemu_domain_address.c @@ -2895,11 +2895,8 @@ qemuDomainReleaseDeviceAddress(virDomainObjPtr vm, if (virDeviceInfoPCIAddressPresent(info)) virDomainPCIAddressReleaseAddr(priv->pciaddrs, &info->addr.pci); - if (info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_USB && - priv->usbaddrs && - virDomainUSBAddressRelease(priv->usbaddrs, info) < 0) - VIR_WARN("Unable to release USB address on %s", - NULLSTR(devstr)); + if (virDomainUSBAddressRelease(priv->usbaddrs, info) < 0) + VIR_WARN("Unable to release USB address on %s", NULLSTR(devstr)); } diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index 91f7f9ed62..10cdba436b 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -2181,7 +2181,6 @@ qemuDomainAttachHostUSBDevice(virQEMUDriverPtr driver, { qemuDomainObjPrivatePtr priv = vm->privateData; char *devstr = NULL; - bool releaseaddr = false; bool added = false; bool teardowncgroup = false; bool teardownlabel = false; @@ -2190,8 +2189,7 @@ qemuDomainAttachHostUSBDevice(virQEMUDriverPtr driver, if (priv->usbaddrs) { if (virDomainUSBAddressEnsure(priv->usbaddrs, hostdev->info) < 0) - goto cleanup; - releaseaddr = true; + return -1; } if (qemuHostdevPrepareUSBDevices(driver, vm->def->name, &hostdev, 1, 0) < 0) @@ -2244,8 +2242,7 @@ qemuDomainAttachHostUSBDevice(virQEMUDriverPtr driver, VIR_WARN("Unable to remove host device from /dev"); if (added) qemuHostdevReAttachUSBDevices(driver, vm->def->name, &hostdev, 1); - if (releaseaddr) - virDomainUSBAddressRelease(priv->usbaddrs, hostdev->info); + virDomainUSBAddressRelease(priv->usbaddrs, hostdev->info); } VIR_FREE(devstr); return ret; @@ -3684,8 +3681,7 @@ qemuDomainRemoveDiskDevice(virQEMUDriverPtr driver, dev.type = VIR_DOMAIN_DEVICE_DISK; dev.data.disk = disk; ignore_value(qemuRemoveSharedDevice(driver, &dev, vm->def->name)); - if (priv->usbaddrs) - virDomainUSBAddressRelease(priv->usbaddrs, &disk->info); + virDomainUSBAddressRelease(priv->usbaddrs, &disk->info); virDomainDiskDefFree(disk); return 0; -- 2.13.6
Rather than having the caller check, if the input @addrs is NULL (e.g. priv->usbaddrs), then just return 0. Signed-off-by: John Ferlan <jferlan@redhat.com> --- src/conf/domain_addr.c | 3 +++ src/conf/domain_addr.h | 2 +- src/qemu/qemu_hotplug.c | 23 ++++++++--------------- 3 files changed, 12 insertions(+), 16 deletions(-) diff --git a/src/conf/domain_addr.c b/src/conf/domain_addr.c index a44f964701..78ff7a9cc6 100644 --- a/src/conf/domain_addr.c +++ b/src/conf/domain_addr.c @@ -2154,6 +2154,9 @@ int virDomainUSBAddressEnsure(virDomainUSBAddressSetPtr addrs, virDomainDeviceInfoPtr info) { + if (!addrs) + return 0; + if (info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE || (info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_USB && !virDomainUSBAddressPortIsValid(info->addr.usb.port))) { diff --git a/src/conf/domain_addr.h b/src/conf/domain_addr.h index 7565322bd2..d3541bab09 100644 --- a/src/conf/domain_addr.h +++ b/src/conf/domain_addr.h @@ -325,7 +325,7 @@ virDomainUSBAddressAssign(virDomainUSBAddressSetPtr addrs, int virDomainUSBAddressEnsure(virDomainUSBAddressSetPtr addrs, virDomainDeviceInfoPtr info) - ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2); + ATTRIBUTE_NONNULL(2); int virDomainUSBAddressRelease(virDomainUSBAddressSetPtr addrs, diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index 10cdba436b..51a7a68f84 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -664,10 +664,8 @@ qemuDomainAttachUSBMassStorageDevice(virConnectPtr conn, { qemuDomainObjPrivatePtr priv = vm->privateData; - if (priv->usbaddrs) { - if (virDomainUSBAddressEnsure(priv->usbaddrs, &disk->info) < 0) - return -1; - } + if (virDomainUSBAddressEnsure(priv->usbaddrs, &disk->info) < 0) + return -1; if (qemuDomainAttachDiskGeneric(conn, driver, vm, disk) < 0) { virDomainUSBAddressRelease(priv->usbaddrs, &disk->info); @@ -1772,8 +1770,7 @@ qemuDomainAttachChrDeviceAssignAddr(virDomainObjPtr vm, return -1; return 1; - } else if (priv->usbaddrs && - chr->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_SERIAL && + } else if (chr->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_SERIAL && chr->targetType == VIR_DOMAIN_CHR_SERIAL_TARGET_TYPE_USB) { if (virDomainUSBAddressEnsure(priv->usbaddrs, &chr->info) < 0) return -1; @@ -2187,10 +2184,8 @@ qemuDomainAttachHostUSBDevice(virQEMUDriverPtr driver, bool teardowndevice = false; int ret = -1; - if (priv->usbaddrs) { - if (virDomainUSBAddressEnsure(priv->usbaddrs, hostdev->info) < 0) - return -1; - } + if (virDomainUSBAddressEnsure(priv->usbaddrs, hostdev->info) < 0) + return -1; if (qemuHostdevPrepareUSBDevices(driver, vm->def->name, &hostdev, 1, 0) < 0) goto cleanup; @@ -2750,11 +2745,9 @@ qemuDomainAttachInputDevice(virQEMUDriverPtr driver, if (qemuDomainEnsureVirtioAddress(&releaseaddr, vm, &dev, "input") < 0) return -1; } else if (input->bus == VIR_DOMAIN_INPUT_BUS_USB) { - if (priv->usbaddrs) { - if (virDomainUSBAddressEnsure(priv->usbaddrs, &input->info) < 0) - goto cleanup; - releaseaddr = true; - } + if (virDomainUSBAddressEnsure(priv->usbaddrs, &input->info) < 0) + goto cleanup; + releaseaddr = true; } if (qemuAssignDeviceInputAlias(vm->def, input, -1) < 0) -- 2.13.6
Since qemuAssignDeviceDiskAlias checks whether the input info.alias is already present, no need to check here as well. Signed-off-by: John Ferlan <jferlan@redhat.com> --- src/qemu/qemu_hotplug.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index 51a7a68f84..9fbb3a0712 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -4447,10 +4447,8 @@ qemuDomainDetachVirtioDiskDevice(virQEMUDriverPtr driver, goto cleanup; } - if (!detach->info.alias) { - if (qemuAssignDeviceDiskAlias(vm->def, detach, priv->qemuCaps) < 0) - goto cleanup; - } + if (qemuAssignDeviceDiskAlias(vm->def, detach, priv->qemuCaps) < 0) + goto cleanup; qemuDomainMarkDeviceForRemoval(vm, &detach->info); -- 2.13.6
On Fri, Oct 20, 2017 at 08:03:29AM -0400, John Ferlan wrote:
Since qemuAssignDeviceDiskAlias checks whether the input info.alias is already present, no need to check here as well.
Signed-off-by: John Ferlan <jferlan@redhat.com> --- src/qemu/qemu_hotplug.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index 51a7a68f84..9fbb3a0712 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -4447,10 +4447,8 @@ qemuDomainDetachVirtioDiskDevice(virQEMUDriverPtr driver, goto cleanup; }
- if (!detach->info.alias) { - if (qemuAssignDeviceDiskAlias(vm->def, detach, priv->qemuCaps) < 0) - goto cleanup; - } + if (qemuAssignDeviceDiskAlias(vm->def, detach, priv->qemuCaps) < 0) + goto cleanup;
All the calls assigning aliases in the Detach functions are unnecessary. At this point, all the domain's devices should have their aliases assigned. If by any case they do not, it is an error in other part of the libvirt code. I was going to send patches cleaning these up, but I could not decide whether to report an error if we find a device without an alias, or to just quietly assume that an alias. And I did not want to conflict with Michal's series again. Jan
qemuDomainMarkDeviceForRemoval(vm, &detach->info);
-- 2.13.6
-- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
On 10/20/2017 08:21 AM, Ján Tomko wrote:
On Fri, Oct 20, 2017 at 08:03:29AM -0400, John Ferlan wrote:
Since qemuAssignDeviceDiskAlias checks whether the input info.alias is already present, no need to check here as well.
Signed-off-by: John Ferlan <jferlan@redhat.com> --- src/qemu/qemu_hotplug.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index 51a7a68f84..9fbb3a0712 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -4447,10 +4447,8 @@ qemuDomainDetachVirtioDiskDevice(virQEMUDriverPtr driver, goto cleanup; }
- if (!detach->info.alias) { - if (qemuAssignDeviceDiskAlias(vm->def, detach, priv->qemuCaps) < 0) - goto cleanup; - } + if (qemuAssignDeviceDiskAlias(vm->def, detach, priv->qemuCaps) < 0) + goto cleanup;
All the calls assigning aliases in the Detach functions are unnecessary. At this point, all the domain's devices should have their aliases assigned. If by any case they do not, it is an error in other part of the libvirt code.
True - I was following the symptom though... That being calling qemuMonitorDelDevice with a NULL detach->info.alias means qemuMonitorTextDelDevice could dereference @devalias in the call to qemuMonitorEscapeArg. In the json path, failure will come during qemuMonitorJSONMakeCommand because "s:id" requires a NON NULL value in virJSONValueObjectAddVArgs. Anyway this just seemed to be the "easiest" adjustment especially since no other caller checks if !*->info.alias before calling qemuAssignDeviceDiskAlias (similar for Controller too) because the top of each checks if already assigned, return 0.
I was going to send patches cleaning these up, but I could not decide whether to report an error if we find a device without an alias, or to just quietly assume that an alias. And I did not want to conflict with Michal's series again.
Jan
Still I do believe it indicates that providing an error message is probably better than blindly hoping things will work. I wasn't following the user alias series that closely so I wasn't thinking about that. I'm perfectly fine with just dropping this and the next patch since at this point it's just Coverity noise that I can easily filter out until something better is provided. John
qemuDomainMarkDeviceForRemoval(vm, &detach->info);
-- 2.13.6
-- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
On 10/20/2017 08:21 AM, Ján Tomko wrote:
On Fri, Oct 20, 2017 at 08:03:29AM -0400, John Ferlan wrote:
Since qemuAssignDeviceDiskAlias checks whether the input info.alias is already present, no need to check here as well.
Signed-off-by: John Ferlan <jferlan@redhat.com> --- src/qemu/qemu_hotplug.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index 51a7a68f84..9fbb3a0712 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -4447,10 +4447,8 @@ qemuDomainDetachVirtioDiskDevice(virQEMUDriverPtr driver, goto cleanup; }
- if (!detach->info.alias) { - if (qemuAssignDeviceDiskAlias(vm->def, detach, priv->qemuCaps) < 0) - goto cleanup; - } + if (qemuAssignDeviceDiskAlias(vm->def, detach, priv->qemuCaps) < 0) + goto cleanup;
All the calls assigning aliases in the Detach functions are unnecessary. At this point, all the domain's devices should have their aliases assigned. If by any case they do not, it is an error in other part of the libvirt code.
I was going to send patches cleaning these up, but I could not decide whether to report an error if we find a device without an alias, or to just quietly assume that an alias. And I did not want to conflict with Michal's series again.
Jan
I cycled back to this - if the alias was NULL and we're using json, then virJSONValueObjectAddVArgs will fail w/ "argument key 'id' must not have null value"; however, the text command path would fail in qemuMonitorEscapeArg as soon as @in is deref'd. So quietly assuming could end badly, but then again only for the old non json path. So either we report an error or just do what I did and rebuilt up the alias. Is there a preference? IDC, either way. Tks - John
qemuDomainMarkDeviceForRemoval(vm, &detach->info);
-- 2.13.6
-- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Since qemuAssignDeviceControllerAlias checks whether the input info.alias is already present, no need to check here as well. Signed-off-by: John Ferlan <jferlan@redhat.com> --- src/qemu/qemu_hotplug.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index 9fbb3a0712..0415584b55 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -4662,10 +4662,8 @@ int qemuDomainDetachControllerDevice(virQEMUDriverPtr driver, goto cleanup; } - if (!detach->info.alias) { - if (qemuAssignDeviceControllerAlias(vm->def, priv->qemuCaps, detach) < 0) - goto cleanup; - } + if (qemuAssignDeviceControllerAlias(vm->def, priv->qemuCaps, detach) < 0) + goto cleanup; qemuDomainMarkDeviceForRemoval(vm, &detach->info); -- 2.13.6
participants (2)
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John Ferlan -
Ján Tomko