[libvirt] [PATCH 1/4 v3] pci: Add two new pci utils pciDeviceGetVirtualFunctionInfo and pciConfigAddressToSysfsFile

From: Roopa Prabhu <roprabhu(a)cisco.com&gt; pciDeviceGetVirtualFunctionInfo returns pf netdevice name and virtual function index for a given vf. This is just a wrapper around existing functions to return vf's pf and vf_index with one api call pciConfigAddressToSysfsfile returns the sysfile pci device link from a 'struct pci_config_address' Signed-off-by: Roopa Prabhu <roprabhu(a)cisco.com&gt; --- src/util/pci.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ src/util/pci.h | 7 +++++++ 2 files changed, 62 insertions(+), 0 deletions(-) diff --git a/src/util/pci.c b/src/util/pci.c index c660e8d..c8a5287 100644 --- a/src/util/pci.c +++ b/src/util/pci.c @@ -2081,6 +2081,20 @@ pciSysfsFile(char *pciDeviceName, char **pci_sysfs_device_link) return 0; } +int +pciConfigAddressToSysfsFile(struct pci_config_address *dev, + char **pci_sysfs_device_link) +{ + if (virAsprintf(pci_sysfs_device_link, + PCI_SYSFS "devices/%04x:%02x:%02x.%x", dev->domain, + dev->bus, dev->slot, dev->function) < 0) { + virReportOOMError(); + return -1; + } + + return 0; +} + /* * Returns the network device name of a pci device */ @@ -2123,6 +2137,38 @@ out: return ret; } + +int +pciDeviceGetVirtualFunctionInfo(const char *vf_sysfs_device_path, + char **pfname, int *vf_index) +{ + struct pci_config_address *pf_config_address = NULL; + char *pf_sysfs_device_path = NULL; + int ret = -1; + + if (pciGetPhysicalFunction(vf_sysfs_device_path, &pf_config_address) < 0) + return ret; + + if (pciConfigAddressToSysfsFile(pf_config_address, + &pf_sysfs_device_path) < 0) { + + VIR_FREE(pf_config_address); + return ret; + } + + if (pciGetVirtualFunctionIndex(pf_sysfs_device_path, vf_sysfs_device_path, + vf_index) < 0) + goto cleanup; + + ret = pciDeviceNetName(pf_sysfs_device_path, pfname); + +cleanup: + VIR_FREE(pf_config_address); + VIR_FREE(pf_sysfs_device_path); + + return ret; +} + #else int pciGetPhysicalFunction(const char *vf_sysfs_path ATTRIBUTE_UNUSED, @@ -2170,4 +2216,13 @@ pciDeviceNetName(char *device_link_sysfs_path ATTRIBUTE_UNUSED, "supported on non-linux platforms")); return -1; } + +int +pciDeviceGetVirtualFunctionInfo(const char *vf_sysfs_device_path ATTRIBUTE_UNUSED, + char **pfname, int *vf_index ATTRIBUTE_UNUSED) +{ + pciReportError(VIR_ERR_INTERNAL_ERROR, _("pciDeviceGetVirtualFunctionInfo " + "is not supported on non-linux platforms")); + return -1; +} #endif /* __linux__ */ diff --git a/src/util/pci.h b/src/util/pci.h index 25b5b66..b71bb12 100644 --- a/src/util/pci.h +++ b/src/util/pci.h @@ -111,6 +111,9 @@ int pciGetVirtualFunctionIndex(const char *pf_sysfs_device_link, const char *vf_sysfs_device_link, int *vf_index); +int pciConfigAddressToSysfsFile(struct pci_config_address *dev, + char **pci_sysfs_device_link); + int pciDeviceNetName(char *device_link_sysfs_path, char **netname); int pciSysfsFile(char *pciDeviceName, char **pci_sysfs_device_link) @@ -122,4 +125,8 @@ int pciGetDeviceAddrString(unsigned domain, unsigned function, char **pciConfigAddr) ATTRIBUTE_NONNULL(5) ATTRIBUTE_RETURN_CHECK; + +int pciDeviceGetVirtualFunctionInfo(const char *vf_sysfs_device_path, + char **pfname, int *vf_index); + #endif /* __VIR_PCI_H__ */