Re: [PATCH 1/5] util: fix tap device name auto-generation for FreeBSD

The Linux implementation of virNetDevCreate() no longer requires a template ifname (e.g. "vnet%d") when it is called, but just generates a new name if ifname is empty. The FreeBSD implementation requires that the caller actually fill in a template ifname, and will fail if ifname is empty. Since we want to eliminate all the special code in callers that is setting the template name, we need to make the behavior of the FreeBSD virNetDevCreate() match the behavior of the Linux virNetDevCreate(). The simplest way to do this is to use the new virNetDevGenerateName() function - if ifname is empty it generates a new name with the proper prefix, and if it's not empty, it leaves it alone. Signed-off-by: Laine Stump <laine(a)redhat.com&gt; --- src/util/virnetdevtap.c | 35 ++++++----------------------------- 1 file changed, 6 insertions(+), 29 deletions(-) diff --git a/src/util/virnetdevtap.c b/src/util/virnetdevtap.c index 88ad321627..cca2f614fe 100644 --- a/src/util/virnetdevtap.c +++ b/src/util/virnetdevtap.c @@ -308,7 +308,6 @@ int virNetDevTapCreate(char **ifname, int s; struct ifreq ifr; int ret = -1; - char *newifname = NULL; if (tapfdSize > 1) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", @@ -316,6 +315,12 @@ int virNetDevTapCreate(char **ifname, goto cleanup; } + /* auto-generate an unused name for the new device (this + * is NOP if a name has been provided) + */ + if (virNetDevGenerateName(ifname, VIR_NET_DEV_GEN_NAME_VNET) < 0) + return -1; +

/* As FreeBSD determines interface type by name, * we have to create 'tap' interface first and * then rename it to 'vnet'