[libvirt] [PATCH 1/3 RFC] Add function to get the network interface name of a pci device

From: Roopa Prabhu <roprabhu(a)cisco.com&gt; This function looks at sysfs "net" directory to get the network interface name associated with the pci device Signed-off-by: Roopa Prabhu <roprabhu(a)cisco.com&gt; Signed-off-by: Christian Benvenuti <benve(a)cisco.com&gt; Signed-off-by: David Wang <dwang2(a)cisco.com&gt; --- src/util/pci.c | 42 ++++++++++++++++++++++++++++++++++++++++++ src/util/pci.h | 2 ++ 2 files changed, 44 insertions(+), 0 deletions(-) diff --git a/src/util/pci.c b/src/util/pci.c index a79c164..d2deeef 100644 --- a/src/util/pci.c +++ b/src/util/pci.c @@ -1679,3 +1679,45 @@ int pciDeviceIsAssignable(pciDevice *dev, return 1; } + +/* + * This function returns the network device name + * of a pci device + */ +int +pciDeviceGetNetName(char *device_link_sysfs_path, char **netname) +{ + char *pcidev_sysfs_net_path = NULL; + int ret = -1; + DIR *dir = NULL; + struct dirent *entry = NULL; + + if (virBuildPath(&pcidev_sysfs_net_path, device_link_sysfs_path, + "net") == -1) { + virReportOOMError(); + return -1; + } + + dir = opendir(pcidev_sysfs_net_path); + if (dir == NULL) + goto out; + + while ((entry = readdir(dir))) { + if (entry->d_name[0] == '.' || + !strcmp(entry->d_name, "..")) + continue; + + /* Assume a single directory entry */ + *netname = strdup(entry->d_name); + ret = 0; + break; + } + + if (dir) + closedir(dir); + +out: + VIR_FREE(pcidev_sysfs_net_path); + + return ret; +} diff --git a/src/util/pci.h b/src/util/pci.h index a351baf..fa25472 100644 --- a/src/util/pci.h +++ b/src/util/pci.h @@ -74,4 +74,6 @@ int pciDeviceIsAssignable(pciDevice *dev, int strict_acs_check); int pciWaitForDeviceCleanup(pciDevice *dev, const char *matcher); +int pciDeviceGetNetName(char *device_link_sysfs_path, char **netname); + #endif /* __VIR_PCI_H__ */