From 426ec9049e29397af95f8c28e020590bd1fe57dd Mon Sep 17 00:00:00 2001 From: Eric Auger Date: Mon, 17 Oct 2016 10:57:56 -0600 Subject: [PATCH] vfio/pci: Use local error object in vfio_initfn To prepare for migration to realize, let's use a local error object in vfio_initfn. Also let's use the same error prefix for all error messages. On top of the 1-1 conversion, we start using a common error prefix for all error messages. We also introduce a similar warning prefix which will be used later on. Signed-off-by: Eric Auger Reviewed-by: Markus Armbruster Signed-off-by: Alex Williamson --- hw/vfio/pci.c | 72 ++++++++++++++++++++--------------- include/hw/vfio/vfio-common.h | 3 ++ 2 files changed, 45 insertions(+), 30 deletions(-) diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index a5a620a0c4..417bf7f87c 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -2493,6 +2493,7 @@ static int vfio_initfn(PCIDevice *pdev) VFIODevice *vbasedev_iter; VFIOGroup *group; char *tmp, group_path[PATH_MAX], *group_name; + Error *err = NULL; ssize_t len; struct stat st; int groupid; @@ -2506,9 +2507,9 @@ static int vfio_initfn(PCIDevice *pdev) } if (stat(vdev->vbasedev.sysfsdev, &st) < 0) { - error_report("vfio: error: no such host device: %s", - vdev->vbasedev.sysfsdev); - return -errno; + error_setg_errno(&err, errno, "no such host device"); + ret = -errno; + goto error; } vdev->vbasedev.name = g_strdup(basename(vdev->vbasedev.sysfsdev)); @@ -2520,40 +2521,43 @@ static int vfio_initfn(PCIDevice *pdev) g_free(tmp); if (len <= 0 || len >= sizeof(group_path)) { - error_report("vfio: error no iommu_group for device"); - return len < 0 ? -errno : -ENAMETOOLONG; + ret = len < 0 ? -errno : -ENAMETOOLONG; + error_setg_errno(&err, -ret, "no iommu_group found"); + goto error; } group_path[len] = 0; group_name = basename(group_path); if (sscanf(group_name, "%d", &groupid) != 1) { - error_report("vfio: error reading %s: %m", group_path); - return -errno; + error_setg_errno(&err, errno, "failed to read %s", group_path); + ret = -errno; + goto error; } trace_vfio_initfn(vdev->vbasedev.name, groupid); group = vfio_get_group(groupid, pci_device_iommu_address_space(pdev)); if (!group) { - error_report("vfio: failed to get group %d", groupid); - return -ENOENT; + error_setg(&err, "failed to get group %d", groupid); + ret = -ENOENT; + goto error; } QLIST_FOREACH(vbasedev_iter, &group->device_list, next) { if (strcmp(vbasedev_iter->name, vdev->vbasedev.name) == 0) { - error_report("vfio: error: device %s is already attached", - vdev->vbasedev.name); + error_setg(&err, "device is already attached"); vfio_put_group(group); - return -EBUSY; + ret = -EBUSY; + goto error; } } ret = vfio_get_device(group, vdev->vbasedev.name, &vdev->vbasedev); if (ret) { - error_report("vfio: failed to get device %s", vdev->vbasedev.name); + error_setg_errno(&err, -ret, "failed to get device"); vfio_put_group(group); - return ret; + goto error; } ret = vfio_populate_device(vdev); @@ -2567,8 +2571,8 @@ static int vfio_initfn(PCIDevice *pdev) vdev->config_offset); if (ret < (int)MIN(pci_config_size(&vdev->pdev), vdev->config_size)) { ret = ret < 0 ? -errno : -EFAULT; - error_report("vfio: Failed to read device config space"); - return ret; + error_setg_errno(&err, -ret, "failed to read device config space"); + goto error; } /* vfio emulates a lot for us, but some bits need extra love */ @@ -2584,8 +2588,9 @@ static int vfio_initfn(PCIDevice *pdev) */ if (vdev->vendor_id != PCI_ANY_ID) { if (vdev->vendor_id >= 0xffff) { - error_report("vfio: Invalid PCI vendor ID provided"); - return -EINVAL; + error_setg(&err, "invalid PCI vendor ID provided"); + ret = -EINVAL; + goto error; } vfio_add_emulated_word(vdev, PCI_VENDOR_ID, vdev->vendor_id, ~0); trace_vfio_pci_emulated_vendor_id(vdev->vbasedev.name, vdev->vendor_id); @@ -2595,8 +2600,9 @@ static int vfio_initfn(PCIDevice *pdev) if (vdev->device_id != PCI_ANY_ID) { if (vdev->device_id > 0xffff) { - error_report("vfio: Invalid PCI device ID provided"); - return -EINVAL; + error_setg(&err, "invalid PCI device ID provided"); + ret = -EINVAL; + goto error; } vfio_add_emulated_word(vdev, PCI_DEVICE_ID, vdev->device_id, ~0); trace_vfio_pci_emulated_device_id(vdev->vbasedev.name, vdev->device_id); @@ -2606,8 +2612,9 @@ static int vfio_initfn(PCIDevice *pdev) if (vdev->sub_vendor_id != PCI_ANY_ID) { if (vdev->sub_vendor_id > 0xffff) { - error_report("vfio: Invalid PCI subsystem vendor ID provided"); - return -EINVAL; + error_setg(&err, "invalid PCI subsystem vendor ID provided"); + ret = -EINVAL; + goto error; } vfio_add_emulated_word(vdev, PCI_SUBSYSTEM_VENDOR_ID, vdev->sub_vendor_id, ~0); @@ -2617,8 +2624,9 @@ static int vfio_initfn(PCIDevice *pdev) if (vdev->sub_device_id != PCI_ANY_ID) { if (vdev->sub_device_id > 0xffff) { - error_report("vfio: Invalid PCI subsystem device ID provided"); - return -EINVAL; + error_setg(&err, "invalid PCI subsystem device ID provided"); + ret = -EINVAL; + goto error; } vfio_add_emulated_word(vdev, PCI_SUBSYSTEM_ID, vdev->sub_device_id, ~0); trace_vfio_pci_emulated_sub_device_id(vdev->vbasedev.name, @@ -2671,8 +2679,9 @@ static int vfio_initfn(PCIDevice *pdev) struct vfio_region_info *opregion; if (vdev->pdev.qdev.hotplugged) { - error_report("Cannot support IGD OpRegion feature on hotplugged " - "device %s", vdev->vbasedev.name); + error_setg(&err, + "cannot support IGD OpRegion feature on hotplugged " + "device"); ret = -EINVAL; goto out_teardown; } @@ -2681,16 +2690,15 @@ static int vfio_initfn(PCIDevice *pdev) VFIO_REGION_TYPE_PCI_VENDOR_TYPE | PCI_VENDOR_ID_INTEL, VFIO_REGION_SUBTYPE_INTEL_IGD_OPREGION, &opregion); if (ret) { - error_report("Device %s does not support requested IGD OpRegion " - "feature", vdev->vbasedev.name); + error_setg_errno(&err, -ret, + "does not support requested IGD OpRegion feature"); goto out_teardown; } ret = vfio_pci_igd_opregion_init(vdev, opregion); g_free(opregion); if (ret) { - error_report("Device %s IGD OpRegion initialization failed", - vdev->vbasedev.name); + error_setg_errno(&err, -ret, "IGD OpRegion initialization failed"); goto out_teardown; } } @@ -2726,6 +2734,10 @@ out_teardown: pci_device_set_intx_routing_notifier(&vdev->pdev, NULL); vfio_teardown_msi(vdev); vfio_bars_exit(vdev); +error: + if (err) { + error_reportf_err(err, ERR_PREFIX, vdev->vbasedev.name); + } return ret; } diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index c17602e533..b26b6cf753 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -30,6 +30,9 @@ #include #endif +#define ERR_PREFIX "vfio error: %s: " +#define WARN_PREFIX "vfio warning: %s: " + /*#define DEBUG_VFIO*/ #ifdef DEBUG_VFIO #define DPRINTF(fmt, ...) \