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Fix bug in ifconfig preventing proper VLAN creation.

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Detection of interface type by filter must happen before detection of
interface type by prefix. Else the following sequence of commands will
try to create a LAGG interface instead of a VLAN interface, which
accidentially worked previously, because the date pointed to by the
ifr_data pointer was not parsed by VLAN create ioctl(2). This is a
regression after r368229, because the VLAN creation now parses the
ifr_data field.

How to reproduce:
# ifconfig lagg0 create
# ifconfig lagg0.256 create

Differential Revision:	https://reviews.freebsd.org/D27521
Reviewed by:		kib@ and kevans@
Reported by:		raul.munoz@custos.es
Sponsored by:		Mellanox Technologies // NVIDIA Networking
This commit is contained in:
Hans Petter Selasky 2020-12-09 20:13:12 +00:00
parent ee47a12a49
commit 21f5dc86d3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=368492
1 changed files with 15 additions and 15 deletions
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30
sbin/ifconfig/ifclone.c
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@ -128,32 +128,32 @@ ifclonecreate(int s, void *arg)
{
struct ifreq ifr;
struct clone_defcb *dcp;
clone_callback_func *clone_cb = NULL;
memset(&ifr, 0, sizeof(ifr));
(void) strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
if (clone_cb == NULL) {
/* Try to find a default callback */
/* Try to find a default callback by filter */
SLIST_FOREACH(dcp, &clone_defcbh, next) {
if (dcp->clone_mt == MT_FILTER &&
dcp->ifmatch(ifr.ifr_name) != 0)
break;
}
if (dcp == NULL) {
/* Try to find a default callback by prefix */
SLIST_FOREACH(dcp, &clone_defcbh, next) {
if ((dcp->clone_mt == MT_PREFIX) &&
(strncmp(dcp->ifprefix, ifr.ifr_name,
strlen(dcp->ifprefix)) == 0)) {
clone_cb = dcp->clone_cb;
if (dcp->clone_mt == MT_PREFIX &&
strncmp(dcp->ifprefix, ifr.ifr_name,
strlen(dcp->ifprefix)) == 0)
break;
}
if ((dcp->clone_mt == MT_FILTER) &&
dcp->ifmatch(ifr.ifr_name)) {
clone_cb = dcp->clone_cb;
break;
}
}
}
if (clone_cb == NULL) {
if (dcp == NULL || dcp->clone_cb == NULL) {
/* NB: no parameters */
ioctl_ifcreate(s, &ifr);
} else {
clone_cb(s, &ifr);
dcp->clone_cb(s, &ifr);
}
/*