| Message ID | 1473145893-17088-3-git-send-email-eric.auger@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Eric Auger <eric.auger@redhat.com> writes: > Let's expand the usage of QEMU Error objects to vfio_populate_device. > > Signed-off-by: Eric Auger <eric.auger@redhat.com> > --- > hw/vfio/pci.c | 45 ++++++++++++++++++++------------------------- > 1 file changed, 20 insertions(+), 25 deletions(-) > > diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c > index ae1967c..f7768e9 100644 > --- a/hw/vfio/pci.c > +++ b/hw/vfio/pci.c > @@ -2197,7 +2197,7 @@ int vfio_populate_vga(VFIOPCIDevice *vdev) > return 0; > } > > -static int vfio_populate_device(VFIOPCIDevice *vdev) > +static void vfio_populate_device(VFIOPCIDevice *vdev, Error **errp) > { > VFIODevice *vbasedev = &vdev->vbasedev; > struct vfio_region_info *reg_info; struct vfio_irq_info irq_info = { .argsz = sizeof(irq_info) }; int i, ret = -1; > @@ -2206,19 +2206,19 @@ static int vfio_populate_device(VFIOPCIDevice *vdev) > > /* Sanity check device */ > if (!(vbasedev->flags & VFIO_DEVICE_FLAGS_PCI)) { > - error_report("vfio: Um, this isn't a PCI device"); > - goto error; > + error_setg(errp, "this isn't a PCI device"); > + return; This is actually a bug fix :) Before your series, vfio_populate_device() returns negative errno on some errors, and -1 on others. Its caller expects the former. Please mention the fix in the commit message. Fixing it in a separate commit would also be fine, and possibly clearer. > } > > if (vbasedev->num_regions < VFIO_PCI_CONFIG_REGION_INDEX + 1) { > - error_report("vfio: unexpected number of io regions %u", > - vbasedev->num_regions); > - goto error; > + error_setg(errp, "unexpected number of io regions %u", > + vbasedev->num_regions); > + return; > } > > if (vbasedev->num_irqs < VFIO_PCI_MSIX_IRQ_INDEX + 1) { > - error_report("vfio: unexpected number of irqs %u", vbasedev->num_irqs); > - goto error; > + error_setg(errp, "unexpected number of irqs %u", vbasedev->num_irqs); > + return; > } > > for (i = VFIO_PCI_BAR0_REGION_INDEX; i < VFIO_PCI_ROM_REGION_INDEX; i++) { > @@ -2229,8 +2229,8 @@ static int vfio_populate_device(VFIOPCIDevice *vdev) > g_free(name); > > if (ret) { > - error_report("vfio: Error getting region %d info: %m", i); > - goto error; > + error_setg_errno(errp, ret, "failed to get region %d info", i); > + return; > } > > QLIST_INIT(&vdev->bars[i].quirks); > @@ -2239,8 +2239,8 @@ static int vfio_populate_device(VFIOPCIDevice *vdev) > ret = vfio_get_region_info(vbasedev, > VFIO_PCI_CONFIG_REGION_INDEX, ®_info); > if (ret) { > - error_report("vfio: Error getting config info: %m"); > - goto error; > + error_setg_errno(errp, ret, "failed to get config info"); > + return; > } > > trace_vfio_populate_device_config(vdev->vbasedev.name, > @@ -2259,9 +2259,9 @@ static int vfio_populate_device(VFIOPCIDevice *vdev) > if (vdev->features & VFIO_FEATURE_ENABLE_VGA) { > ret = vfio_populate_vga(vdev); > if (ret) { > - error_report( > - "vfio: Device does not support requested feature x-vga"); > - goto error; > + error_setg_errno(errp, ret, > + "device does not support requested feature x-vga"); > + return; > } > } > > @@ -2271,17 +2271,11 @@ static int vfio_populate_device(VFIOPCIDevice *vdev) > if (ret) { > /* This can fail for an old kernel or legacy PCI dev */ > trace_vfio_populate_device_get_irq_info_failure(); > - ret = 0; > } else if (irq_info.count == 1) { > vdev->pci_aer = true; > } else { > - error_report("vfio: %s " > - "Could not enable error recovery for the device", > - vbasedev->name); > + error_setg_errno(errp, ret, "could not enable error recovery"); This isn't an error before this patch (ret stays zero). Your patch turns it into one. Intentional? > } > - > -error: > - return ret; > } > > static void vfio_put_device(VFIOPCIDevice *vdev) > @@ -2491,6 +2485,7 @@ static void vfio_realize(PCIDevice *pdev, Error **errp) > VFIODevice *vbasedev_iter; > VFIOGroup *group; > char *tmp, group_path[PATH_MAX], *group_name; > + Error *err = NULL; > ssize_t len; > struct stat st; > int groupid; > @@ -2554,9 +2549,9 @@ static void vfio_realize(PCIDevice *pdev, Error **errp) > goto error; > } > > - ret = vfio_populate_device(vdev); > - if (ret) { > - error_setg_errno(errp, ret, "failed to populate the device"); > + vfio_populate_device(vdev, &err); > + if (err) { > + error_propagate(errp, err); > goto error; > }
Hi Markus, On 12/09/2016 14:51, Markus Armbruster wrote: > Eric Auger <eric.auger@redhat.com> writes: > >> Let's expand the usage of QEMU Error objects to vfio_populate_device. >> >> Signed-off-by: Eric Auger <eric.auger@redhat.com> >> --- >> hw/vfio/pci.c | 45 ++++++++++++++++++++------------------------- >> 1 file changed, 20 insertions(+), 25 deletions(-) >> >> diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c >> index ae1967c..f7768e9 100644 >> --- a/hw/vfio/pci.c >> +++ b/hw/vfio/pci.c >> @@ -2197,7 +2197,7 @@ int vfio_populate_vga(VFIOPCIDevice *vdev) >> return 0; >> } >> >> -static int vfio_populate_device(VFIOPCIDevice *vdev) >> +static void vfio_populate_device(VFIOPCIDevice *vdev, Error **errp) >> { >> VFIODevice *vbasedev = &vdev->vbasedev; >> struct vfio_region_info *reg_info; > struct vfio_irq_info irq_info = { .argsz = sizeof(irq_info) }; > int i, ret = -1; >> @@ -2206,19 +2206,19 @@ static int vfio_populate_device(VFIOPCIDevice *vdev) >> >> /* Sanity check device */ >> if (!(vbasedev->flags & VFIO_DEVICE_FLAGS_PCI)) { >> - error_report("vfio: Um, this isn't a PCI device"); >> - goto error; >> + error_setg(errp, "this isn't a PCI device"); >> + return; > > This is actually a bug fix :) > > Before your series, vfio_populate_device() returns negative errno on > some errors, and -1 on others. Its caller expects the former. Sorry but I don't get your comment. Who is the caller you refer to? > > Please mention the fix in the commit message. Fixing it in a separate > commit would also be fine, and possibly clearer. > >> } >> >> if (vbasedev->num_regions < VFIO_PCI_CONFIG_REGION_INDEX + 1) { >> - error_report("vfio: unexpected number of io regions %u", >> - vbasedev->num_regions); >> - goto error; >> + error_setg(errp, "unexpected number of io regions %u", >> + vbasedev->num_regions); >> + return; >> } >> >> if (vbasedev->num_irqs < VFIO_PCI_MSIX_IRQ_INDEX + 1) { >> - error_report("vfio: unexpected number of irqs %u", vbasedev->num_irqs); >> - goto error; >> + error_setg(errp, "unexpected number of irqs %u", vbasedev->num_irqs); >> + return; >> } >> >> for (i = VFIO_PCI_BAR0_REGION_INDEX; i < VFIO_PCI_ROM_REGION_INDEX; i++) { >> @@ -2229,8 +2229,8 @@ static int vfio_populate_device(VFIOPCIDevice *vdev) >> g_free(name); >> >> if (ret) { >> - error_report("vfio: Error getting region %d info: %m", i); >> - goto error; >> + error_setg_errno(errp, ret, "failed to get region %d info", i); >> + return; >> } >> >> QLIST_INIT(&vdev->bars[i].quirks); >> @@ -2239,8 +2239,8 @@ static int vfio_populate_device(VFIOPCIDevice *vdev) >> ret = vfio_get_region_info(vbasedev, >> VFIO_PCI_CONFIG_REGION_INDEX, ®_info); >> if (ret) { >> - error_report("vfio: Error getting config info: %m"); >> - goto error; >> + error_setg_errno(errp, ret, "failed to get config info"); >> + return; >> } >> >> trace_vfio_populate_device_config(vdev->vbasedev.name, >> @@ -2259,9 +2259,9 @@ static int vfio_populate_device(VFIOPCIDevice *vdev) >> if (vdev->features & VFIO_FEATURE_ENABLE_VGA) { >> ret = vfio_populate_vga(vdev); >> if (ret) { >> - error_report( >> - "vfio: Device does not support requested feature x-vga"); >> - goto error; >> + error_setg_errno(errp, ret, >> + "device does not support requested feature x-vga"); >> + return; >> } >> } >> >> @@ -2271,17 +2271,11 @@ static int vfio_populate_device(VFIOPCIDevice *vdev) >> if (ret) { >> /* This can fail for an old kernel or legacy PCI dev */ >> trace_vfio_populate_device_get_irq_info_failure(); >> - ret = 0; >> } else if (irq_info.count == 1) { >> vdev->pci_aer = true; >> } else { >> - error_report("vfio: %s " >> - "Could not enable error recovery for the device", >> - vbasedev->name); >> + error_setg_errno(errp, ret, "could not enable error recovery"); > > This isn't an error before this patch (ret stays zero). Your patch > turns it into one. Intentional? Hum no thank you for spotting this bug! Thanks Eric > >> } >> - >> -error: >> - return ret; >> } >> >> static void vfio_put_device(VFIOPCIDevice *vdev) >> @@ -2491,6 +2485,7 @@ static void vfio_realize(PCIDevice *pdev, Error **errp) >> VFIODevice *vbasedev_iter; >> VFIOGroup *group; >> char *tmp, group_path[PATH_MAX], *group_name; >> + Error *err = NULL; >> ssize_t len; >> struct stat st; >> int groupid; >> @@ -2554,9 +2549,9 @@ static void vfio_realize(PCIDevice *pdev, Error **errp) >> goto error; >> } >> >> - ret = vfio_populate_device(vdev); >> - if (ret) { >> - error_setg_errno(errp, ret, "failed to populate the device"); >> + vfio_populate_device(vdev, &err); >> + if (err) { >> + error_propagate(errp, err); >> goto error; >> } >
Auger Eric <eric.auger@redhat.com> writes: > Hi Markus, > > On 12/09/2016 14:51, Markus Armbruster wrote: >> Eric Auger <eric.auger@redhat.com> writes: >> >>> Let's expand the usage of QEMU Error objects to vfio_populate_device. >>> >>> Signed-off-by: Eric Auger <eric.auger@redhat.com> >>> --- >>> hw/vfio/pci.c | 45 ++++++++++++++++++++------------------------- >>> 1 file changed, 20 insertions(+), 25 deletions(-) >>> >>> diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c >>> index ae1967c..f7768e9 100644 >>> --- a/hw/vfio/pci.c >>> +++ b/hw/vfio/pci.c >>> @@ -2197,7 +2197,7 @@ int vfio_populate_vga(VFIOPCIDevice *vdev) >>> return 0; >>> } >>> >>> -static int vfio_populate_device(VFIOPCIDevice *vdev) >>> +static void vfio_populate_device(VFIOPCIDevice *vdev, Error **errp) >>> { >>> VFIODevice *vbasedev = &vdev->vbasedev; >>> struct vfio_region_info *reg_info; >> struct vfio_irq_info irq_info = { .argsz = sizeof(irq_info) }; >> int i, ret = -1; >>> @@ -2206,19 +2206,19 @@ static int vfio_populate_device(VFIOPCIDevice *vdev) >>> >>> /* Sanity check device */ >>> if (!(vbasedev->flags & VFIO_DEVICE_FLAGS_PCI)) { >>> - error_report("vfio: Um, this isn't a PCI device"); >>> - goto error; >>> + error_setg(errp, "this isn't a PCI device"); >>> + return; >> >> This is actually a bug fix :) >> >> Before your series, vfio_populate_device() returns negative errno on >> some errors, and -1 on others. Its caller expects the former. > > Sorry but I don't get your comment. Who is the caller you refer to? Correction: its caller vfio_initfn() doesn't actually expect -errno. Regardless, mixing -errno and -1 like vfio_populate_device() does in master is in bad taste. So this isn't a bug fix, just a cleanup. >> Please mention the fix in the commit message. Fixing it in a separate >> commit would also be fine, and possibly clearer. Mentioning the cleanup wouldn't hurt. [...]
Hi Markus, On 12/09/2016 17:50, Markus Armbruster wrote: > Auger Eric <eric.auger@redhat.com> writes: > >> Hi Markus, >> >> On 12/09/2016 14:51, Markus Armbruster wrote: >>> Eric Auger <eric.auger@redhat.com> writes: >>> >>>> Let's expand the usage of QEMU Error objects to vfio_populate_device. >>>> >>>> Signed-off-by: Eric Auger <eric.auger@redhat.com> >>>> --- >>>> hw/vfio/pci.c | 45 ++++++++++++++++++++------------------------- >>>> 1 file changed, 20 insertions(+), 25 deletions(-) >>>> >>>> diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c >>>> index ae1967c..f7768e9 100644 >>>> --- a/hw/vfio/pci.c >>>> +++ b/hw/vfio/pci.c >>>> @@ -2197,7 +2197,7 @@ int vfio_populate_vga(VFIOPCIDevice *vdev) >>>> return 0; >>>> } >>>> >>>> -static int vfio_populate_device(VFIOPCIDevice *vdev) >>>> +static void vfio_populate_device(VFIOPCIDevice *vdev, Error **errp) >>>> { >>>> VFIODevice *vbasedev = &vdev->vbasedev; >>>> struct vfio_region_info *reg_info; >>> struct vfio_irq_info irq_info = { .argsz = sizeof(irq_info) }; >>> int i, ret = -1; >>>> @@ -2206,19 +2206,19 @@ static int vfio_populate_device(VFIOPCIDevice *vdev) >>>> >>>> /* Sanity check device */ >>>> if (!(vbasedev->flags & VFIO_DEVICE_FLAGS_PCI)) { >>>> - error_report("vfio: Um, this isn't a PCI device"); >>>> - goto error; >>>> + error_setg(errp, "this isn't a PCI device"); >>>> + return; >>> >>> This is actually a bug fix :) >>> >>> Before your series, vfio_populate_device() returns negative errno on >>> some errors, and -1 on others. Its caller expects the former. >> >> Sorry but I don't get your comment. Who is the caller you refer to? > > Correction: its caller vfio_initfn() doesn't actually expect -errno. > Regardless, mixing -errno and -1 like vfio_populate_device() does in > master is in bad taste. So this isn't a bug fix, just a cleanup. > >>> Please mention the fix in the commit message. Fixing it in a separate >>> commit would also be fine, and possibly clearer. > > Mentioning the cleanup wouldn't hurt. OK Thanks! Eric > > [...] >
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index ae1967c..f7768e9 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -2197,7 +2197,7 @@ int vfio_populate_vga(VFIOPCIDevice *vdev) return 0; } -static int vfio_populate_device(VFIOPCIDevice *vdev) +static void vfio_populate_device(VFIOPCIDevice *vdev, Error **errp) { VFIODevice *vbasedev = &vdev->vbasedev; struct vfio_region_info *reg_info; @@ -2206,19 +2206,19 @@ static int vfio_populate_device(VFIOPCIDevice *vdev) /* Sanity check device */ if (!(vbasedev->flags & VFIO_DEVICE_FLAGS_PCI)) { - error_report("vfio: Um, this isn't a PCI device"); - goto error; + error_setg(errp, "this isn't a PCI device"); + return; } if (vbasedev->num_regions < VFIO_PCI_CONFIG_REGION_INDEX + 1) { - error_report("vfio: unexpected number of io regions %u", - vbasedev->num_regions); - goto error; + error_setg(errp, "unexpected number of io regions %u", + vbasedev->num_regions); + return; } if (vbasedev->num_irqs < VFIO_PCI_MSIX_IRQ_INDEX + 1) { - error_report("vfio: unexpected number of irqs %u", vbasedev->num_irqs); - goto error; + error_setg(errp, "unexpected number of irqs %u", vbasedev->num_irqs); + return; } for (i = VFIO_PCI_BAR0_REGION_INDEX; i < VFIO_PCI_ROM_REGION_INDEX; i++) { @@ -2229,8 +2229,8 @@ static int vfio_populate_device(VFIOPCIDevice *vdev) g_free(name); if (ret) { - error_report("vfio: Error getting region %d info: %m", i); - goto error; + error_setg_errno(errp, ret, "failed to get region %d info", i); + return; } QLIST_INIT(&vdev->bars[i].quirks); @@ -2239,8 +2239,8 @@ static int vfio_populate_device(VFIOPCIDevice *vdev) ret = vfio_get_region_info(vbasedev, VFIO_PCI_CONFIG_REGION_INDEX, ®_info); if (ret) { - error_report("vfio: Error getting config info: %m"); - goto error; + error_setg_errno(errp, ret, "failed to get config info"); + return; } trace_vfio_populate_device_config(vdev->vbasedev.name, @@ -2259,9 +2259,9 @@ static int vfio_populate_device(VFIOPCIDevice *vdev) if (vdev->features & VFIO_FEATURE_ENABLE_VGA) { ret = vfio_populate_vga(vdev); if (ret) { - error_report( - "vfio: Device does not support requested feature x-vga"); - goto error; + error_setg_errno(errp, ret, + "device does not support requested feature x-vga"); + return; } } @@ -2271,17 +2271,11 @@ static int vfio_populate_device(VFIOPCIDevice *vdev) if (ret) { /* This can fail for an old kernel or legacy PCI dev */ trace_vfio_populate_device_get_irq_info_failure(); - ret = 0; } else if (irq_info.count == 1) { vdev->pci_aer = true; } else { - error_report("vfio: %s " - "Could not enable error recovery for the device", - vbasedev->name); + error_setg_errno(errp, ret, "could not enable error recovery"); } - -error: - return ret; } static void vfio_put_device(VFIOPCIDevice *vdev) @@ -2491,6 +2485,7 @@ static void vfio_realize(PCIDevice *pdev, Error **errp) VFIODevice *vbasedev_iter; VFIOGroup *group; char *tmp, group_path[PATH_MAX], *group_name; + Error *err = NULL; ssize_t len; struct stat st; int groupid; @@ -2554,9 +2549,9 @@ static void vfio_realize(PCIDevice *pdev, Error **errp) goto error; } - ret = vfio_populate_device(vdev); - if (ret) { - error_setg_errno(errp, ret, "failed to populate the device"); + vfio_populate_device(vdev, &err); + if (err) { + error_propagate(errp, err); goto error; }
Let's expand the usage of QEMU Error objects to vfio_populate_device. Signed-off-by: Eric Auger <eric.auger@redhat.com> --- hw/vfio/pci.c | 45 ++++++++++++++++++++------------------------- 1 file changed, 20 insertions(+), 25 deletions(-)