| Message ID | 1474404352-28958-5-git-send-email-eric.auger@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Eric Auger <eric.auger@redhat.com> writes: > Pass an error object to prepare for migration to VFIO-PCI realize. > > The error object is propagated downto vfio_intx_enable_kvm down to vfio_intx_enable_kvm(). (feel free to omit the () I automatically add after a function name) > vfio_intx_update which calls vfio_intx_enable_kvm and > vfio_msi_disable_common/vfio_pci_post_reset which calls vfio_intx_enable Suggest: The three other callers vfio_intx_update, vfio_msi_disable_common() and vfio_pci_post_reset() > do not propagate the error and simply call error_reportf_err with the > ERR_PREFIX formatting. > > Signed-off-by: Eric Auger <eric.auger@redhat.com> > > --- > > v2: creation > --- > hw/vfio/pci.c | 39 +++++++++++++++++++++++++++------------ > 1 file changed, 27 insertions(+), 12 deletions(-) > > diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c > index b35925a..f67eec4 100644 > --- a/hw/vfio/pci.c > +++ b/hw/vfio/pci.c > @@ -100,7 +100,7 @@ static void vfio_intx_eoi(VFIODevice *vbasedev) > vfio_unmask_single_irqindex(vbasedev, VFIO_PCI_INTX_IRQ_INDEX); > } > > -static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev) > +static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev, Error **errp) > { > #ifdef CONFIG_KVM > struct kvm_irqfd irqfd = { > @@ -126,7 +126,7 @@ static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev) > > /* Get an eventfd for resample/unmask */ > if (event_notifier_init(&vdev->intx.unmask, 0)) { > - error_report("vfio: Error: event_notifier_init failed eoi"); > + error_setg(errp, "event_notifier_init failed eoi"); > goto fail; > } > > @@ -134,7 +134,7 @@ static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev) > irqfd.resamplefd = event_notifier_get_fd(&vdev->intx.unmask); > > if (kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd)) { > - error_report("vfio: Error: Failed to setup resample irqfd: %m"); > + error_setg_errno(errp, errno, "failed to setup resample irqfd"); > goto fail_irqfd; > } > > @@ -153,7 +153,7 @@ static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev) > ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set); > g_free(irq_set); > if (ret) { > - error_report("vfio: Error: Failed to setup INTx unmask fd: %m"); > + error_setg_errno(errp, -ret, "failed to setup INTx unmask fd"); > goto fail_vfio; > } > > @@ -222,6 +222,7 @@ static void vfio_intx_update(PCIDevice *pdev) > { > VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev); > PCIINTxRoute route; > + Error *err = NULL; > > if (vdev->interrupt != VFIO_INT_INTx) { > return; > @@ -244,18 +245,22 @@ static void vfio_intx_update(PCIDevice *pdev) > return; > } > > - vfio_intx_enable_kvm(vdev); > + vfio_intx_enable_kvm(vdev, &err); > + if (err) { > + error_reportf_err(err, ERR_PREFIX, vdev->vbasedev.name); > + } > > /* Re-enable the interrupt in cased we missed an EOI */ > vfio_intx_eoi(&vdev->vbasedev); > } Nate that this function now permits callers to detect failure. > > -static int vfio_intx_enable(VFIOPCIDevice *vdev) > +static int vfio_intx_enable(VFIOPCIDevice *vdev, Error **errp) > { > uint8_t pin = vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1); > int ret, argsz; > struct vfio_irq_set *irq_set; > int32_t *pfd; > + Error *err = NULL; > > if (!pin) { > return 0; > @@ -279,7 +284,7 @@ static int vfio_intx_enable(VFIOPCIDevice *vdev) > > ret = event_notifier_init(&vdev->intx.interrupt, 0); > if (ret) { > - error_report("vfio: Error: event_notifier_init failed"); > + error_setg_errno(errp, -ret, "event_notifier_init failed"); > return ret; > } > > @@ -299,13 +304,14 @@ static int vfio_intx_enable(VFIOPCIDevice *vdev) > ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set); > g_free(irq_set); > if (ret) { > - error_report("vfio: Error: Failed to setup INTx fd: %m"); > + error_setg_errno(errp, -ret, "failed to setup INTx fd"); > qemu_set_fd_handler(*pfd, NULL, NULL, vdev); > event_notifier_cleanup(&vdev->intx.interrupt); > return -errno; > } > > - vfio_intx_enable_kvm(vdev); > + vfio_intx_enable_kvm(vdev, &err); > + error_propagate(errp, err); This wasn't an error before. Bug fix or regression? Since you don't examine err, you should simply vfio_intx_enable_kvm(errp) > vdev->interrupt = VFIO_INT_INTx; > > @@ -707,6 +713,7 @@ retry: > > static void vfio_msi_disable_common(VFIOPCIDevice *vdev) > { > + Error *err = NULL; > int i; > > for (i = 0; i < vdev->nr_vectors; i++) { > @@ -726,7 +733,10 @@ static void vfio_msi_disable_common(VFIOPCIDevice *vdev) > vdev->nr_vectors = 0; > vdev->interrupt = VFIO_INT_NONE; > > - vfio_intx_enable(vdev); > + vfio_intx_enable(vdev, &err); > + if (err) { > + error_reportf_err(err, ERR_PREFIX, vdev->vbasedev.name); > + } > } > > static void vfio_msix_disable(VFIOPCIDevice *vdev) > @@ -1908,7 +1918,12 @@ static void vfio_pci_pre_reset(VFIOPCIDevice *vdev) > > static void vfio_pci_post_reset(VFIOPCIDevice *vdev) > { > - vfio_intx_enable(vdev); > + Error *err = NULL; > + > + vfio_intx_enable(vdev, &err); > + if (err) { > + error_reportf_err(err, ERR_PREFIX, vdev->vbasedev.name); > + } > } > > static bool vfio_pci_host_match(PCIHostDeviceAddress *addr, const char *name) > @@ -2722,7 +2737,7 @@ static int vfio_initfn(PCIDevice *pdev) > vdev->intx.mmap_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, > vfio_intx_mmap_enable, vdev); > pci_device_set_intx_routing_notifier(&vdev->pdev, vfio_intx_update); > - ret = vfio_intx_enable(vdev); > + ret = vfio_intx_enable(vdev, &err); > if (ret) { > goto out_teardown; > }
Markus, On 22/09/2016 18:27, Markus Armbruster wrote: > Eric Auger <eric.auger@redhat.com> writes: > >> Pass an error object to prepare for migration to VFIO-PCI realize. >> >> The error object is propagated downto vfio_intx_enable_kvm > > down to vfio_intx_enable_kvm(). > > (feel free to omit the () I automatically add after a function name) > >> vfio_intx_update which calls vfio_intx_enable_kvm and >> vfio_msi_disable_common/vfio_pci_post_reset which calls vfio_intx_enable I took into account the rewording suggestions. > > Suggest: The three other callers vfio_intx_update, > vfio_msi_disable_common() and vfio_pci_post_reset() > >> do not propagate the error and simply call error_reportf_err with the >> ERR_PREFIX formatting. >> >> Signed-off-by: Eric Auger <eric.auger@redhat.com> >> >> --- >> >> v2: creation >> --- >> hw/vfio/pci.c | 39 +++++++++++++++++++++++++++------------ >> 1 file changed, 27 insertions(+), 12 deletions(-) >> >> diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c >> index b35925a..f67eec4 100644 >> --- a/hw/vfio/pci.c >> +++ b/hw/vfio/pci.c >> @@ -100,7 +100,7 @@ static void vfio_intx_eoi(VFIODevice *vbasedev) >> vfio_unmask_single_irqindex(vbasedev, VFIO_PCI_INTX_IRQ_INDEX); >> } >> >> -static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev) >> +static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev, Error **errp) >> { >> #ifdef CONFIG_KVM >> struct kvm_irqfd irqfd = { >> @@ -126,7 +126,7 @@ static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev) >> >> /* Get an eventfd for resample/unmask */ >> if (event_notifier_init(&vdev->intx.unmask, 0)) { >> - error_report("vfio: Error: event_notifier_init failed eoi"); >> + error_setg(errp, "event_notifier_init failed eoi"); >> goto fail; >> } >> >> @@ -134,7 +134,7 @@ static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev) >> irqfd.resamplefd = event_notifier_get_fd(&vdev->intx.unmask); >> >> if (kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd)) { >> - error_report("vfio: Error: Failed to setup resample irqfd: %m"); >> + error_setg_errno(errp, errno, "failed to setup resample irqfd"); >> goto fail_irqfd; >> } >> >> @@ -153,7 +153,7 @@ static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev) >> ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set); >> g_free(irq_set); >> if (ret) { >> - error_report("vfio: Error: Failed to setup INTx unmask fd: %m"); >> + error_setg_errno(errp, -ret, "failed to setup INTx unmask fd"); >> goto fail_vfio; >> } >> >> @@ -222,6 +222,7 @@ static void vfio_intx_update(PCIDevice *pdev) >> { >> VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev); >> PCIINTxRoute route; >> + Error *err = NULL; >> >> if (vdev->interrupt != VFIO_INT_INTx) { >> return; >> @@ -244,18 +245,22 @@ static void vfio_intx_update(PCIDevice *pdev) >> return; >> } >> >> - vfio_intx_enable_kvm(vdev); >> + vfio_intx_enable_kvm(vdev, &err); >> + if (err) { >> + error_reportf_err(err, ERR_PREFIX, vdev->vbasedev.name); >> + } >> >> /* Re-enable the interrupt in cased we missed an EOI */ >> vfio_intx_eoi(&vdev->vbasedev); >> } > > Nate that this function now permits callers to detect failure. There was error_report before in vfio_intx_enable_kvm but indeed testing vfio_intx_enable_kvm()'s *errp now makes possible to detect issues. > >> >> -static int vfio_intx_enable(VFIOPCIDevice *vdev) >> +static int vfio_intx_enable(VFIOPCIDevice *vdev, Error **errp) >> { >> uint8_t pin = vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1); >> int ret, argsz; >> struct vfio_irq_set *irq_set; >> int32_t *pfd; >> + Error *err = NULL; >> >> if (!pin) { >> return 0; >> @@ -279,7 +284,7 @@ static int vfio_intx_enable(VFIOPCIDevice *vdev) >> >> ret = event_notifier_init(&vdev->intx.interrupt, 0); >> if (ret) { >> - error_report("vfio: Error: event_notifier_init failed"); >> + error_setg_errno(errp, -ret, "event_notifier_init failed"); >> return ret; >> } >> >> @@ -299,13 +304,14 @@ static int vfio_intx_enable(VFIOPCIDevice *vdev) >> ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set); >> g_free(irq_set); >> if (ret) { >> - error_report("vfio: Error: Failed to setup INTx fd: %m"); >> + error_setg_errno(errp, -ret, "failed to setup INTx fd"); >> qemu_set_fd_handler(*pfd, NULL, NULL, vdev); >> event_notifier_cleanup(&vdev->intx.interrupt); >> return -errno; >> } >> >> - vfio_intx_enable_kvm(vdev); >> + vfio_intx_enable_kvm(vdev, &err); >> + error_propagate(errp, err); > > This wasn't an error before. Bug fix or regression? Thanks for catching this. It is a regression since in case KVM setup fails we revert to userspace handled eventfds. I replaced that by a warning instead. Thanks! Eric > > Since you don't examine err, you should simply > > vfio_intx_enable_kvm(errp) > >> vdev->interrupt = VFIO_INT_INTx; >> >> @@ -707,6 +713,7 @@ retry: >> >> static void vfio_msi_disable_common(VFIOPCIDevice *vdev) >> { >> + Error *err = NULL; >> int i; >> >> for (i = 0; i < vdev->nr_vectors; i++) { >> @@ -726,7 +733,10 @@ static void vfio_msi_disable_common(VFIOPCIDevice *vdev) >> vdev->nr_vectors = 0; >> vdev->interrupt = VFIO_INT_NONE; >> >> - vfio_intx_enable(vdev); >> + vfio_intx_enable(vdev, &err); >> + if (err) { >> + error_reportf_err(err, ERR_PREFIX, vdev->vbasedev.name); >> + } >> } >> >> static void vfio_msix_disable(VFIOPCIDevice *vdev) >> @@ -1908,7 +1918,12 @@ static void vfio_pci_pre_reset(VFIOPCIDevice *vdev) >> >> static void vfio_pci_post_reset(VFIOPCIDevice *vdev) >> { >> - vfio_intx_enable(vdev); >> + Error *err = NULL; >> + >> + vfio_intx_enable(vdev, &err); >> + if (err) { >> + error_reportf_err(err, ERR_PREFIX, vdev->vbasedev.name); >> + } >> } >> >> static bool vfio_pci_host_match(PCIHostDeviceAddress *addr, const char *name) >> @@ -2722,7 +2737,7 @@ static int vfio_initfn(PCIDevice *pdev) >> vdev->intx.mmap_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, >> vfio_intx_mmap_enable, vdev); >> pci_device_set_intx_routing_notifier(&vdev->pdev, vfio_intx_update); >> - ret = vfio_intx_enable(vdev); >> + ret = vfio_intx_enable(vdev, &err); >> if (ret) { >> goto out_teardown; >> } >
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index b35925a..f67eec4 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -100,7 +100,7 @@ static void vfio_intx_eoi(VFIODevice *vbasedev) vfio_unmask_single_irqindex(vbasedev, VFIO_PCI_INTX_IRQ_INDEX); } -static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev) +static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev, Error **errp) { #ifdef CONFIG_KVM struct kvm_irqfd irqfd = { @@ -126,7 +126,7 @@ static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev) /* Get an eventfd for resample/unmask */ if (event_notifier_init(&vdev->intx.unmask, 0)) { - error_report("vfio: Error: event_notifier_init failed eoi"); + error_setg(errp, "event_notifier_init failed eoi"); goto fail; } @@ -134,7 +134,7 @@ static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev) irqfd.resamplefd = event_notifier_get_fd(&vdev->intx.unmask); if (kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd)) { - error_report("vfio: Error: Failed to setup resample irqfd: %m"); + error_setg_errno(errp, errno, "failed to setup resample irqfd"); goto fail_irqfd; } @@ -153,7 +153,7 @@ static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev) ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set); g_free(irq_set); if (ret) { - error_report("vfio: Error: Failed to setup INTx unmask fd: %m"); + error_setg_errno(errp, -ret, "failed to setup INTx unmask fd"); goto fail_vfio; } @@ -222,6 +222,7 @@ static void vfio_intx_update(PCIDevice *pdev) { VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev); PCIINTxRoute route; + Error *err = NULL; if (vdev->interrupt != VFIO_INT_INTx) { return; @@ -244,18 +245,22 @@ static void vfio_intx_update(PCIDevice *pdev) return; } - vfio_intx_enable_kvm(vdev); + vfio_intx_enable_kvm(vdev, &err); + if (err) { + error_reportf_err(err, ERR_PREFIX, vdev->vbasedev.name); + } /* Re-enable the interrupt in cased we missed an EOI */ vfio_intx_eoi(&vdev->vbasedev); } -static int vfio_intx_enable(VFIOPCIDevice *vdev) +static int vfio_intx_enable(VFIOPCIDevice *vdev, Error **errp) { uint8_t pin = vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1); int ret, argsz; struct vfio_irq_set *irq_set; int32_t *pfd; + Error *err = NULL; if (!pin) { return 0; @@ -279,7 +284,7 @@ static int vfio_intx_enable(VFIOPCIDevice *vdev) ret = event_notifier_init(&vdev->intx.interrupt, 0); if (ret) { - error_report("vfio: Error: event_notifier_init failed"); + error_setg_errno(errp, -ret, "event_notifier_init failed"); return ret; } @@ -299,13 +304,14 @@ static int vfio_intx_enable(VFIOPCIDevice *vdev) ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set); g_free(irq_set); if (ret) { - error_report("vfio: Error: Failed to setup INTx fd: %m"); + error_setg_errno(errp, -ret, "failed to setup INTx fd"); qemu_set_fd_handler(*pfd, NULL, NULL, vdev); event_notifier_cleanup(&vdev->intx.interrupt); return -errno; } - vfio_intx_enable_kvm(vdev); + vfio_intx_enable_kvm(vdev, &err); + error_propagate(errp, err); vdev->interrupt = VFIO_INT_INTx; @@ -707,6 +713,7 @@ retry: static void vfio_msi_disable_common(VFIOPCIDevice *vdev) { + Error *err = NULL; int i; for (i = 0; i < vdev->nr_vectors; i++) { @@ -726,7 +733,10 @@ static void vfio_msi_disable_common(VFIOPCIDevice *vdev) vdev->nr_vectors = 0; vdev->interrupt = VFIO_INT_NONE; - vfio_intx_enable(vdev); + vfio_intx_enable(vdev, &err); + if (err) { + error_reportf_err(err, ERR_PREFIX, vdev->vbasedev.name); + } } static void vfio_msix_disable(VFIOPCIDevice *vdev) @@ -1908,7 +1918,12 @@ static void vfio_pci_pre_reset(VFIOPCIDevice *vdev) static void vfio_pci_post_reset(VFIOPCIDevice *vdev) { - vfio_intx_enable(vdev); + Error *err = NULL; + + vfio_intx_enable(vdev, &err); + if (err) { + error_reportf_err(err, ERR_PREFIX, vdev->vbasedev.name); + } } static bool vfio_pci_host_match(PCIHostDeviceAddress *addr, const char *name) @@ -2722,7 +2737,7 @@ static int vfio_initfn(PCIDevice *pdev) vdev->intx.mmap_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, vfio_intx_mmap_enable, vdev); pci_device_set_intx_routing_notifier(&vdev->pdev, vfio_intx_update); - ret = vfio_intx_enable(vdev); + ret = vfio_intx_enable(vdev, &err); if (ret) { goto out_teardown; }
Pass an error object to prepare for migration to VFIO-PCI realize. The error object is propagated downto vfio_intx_enable_kvm vfio_intx_update which calls vfio_intx_enable_kvm and vfio_msi_disable_common/vfio_pci_post_reset which calls vfio_intx_enable do not propagate the error and simply call error_reportf_err with the ERR_PREFIX formatting. Signed-off-by: Eric Auger <eric.auger@redhat.com> --- v2: creation --- hw/vfio/pci.c | 39 +++++++++++++++++++++++++++------------ 1 file changed, 27 insertions(+), 12 deletions(-)