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ifconfig: add setifcapnv()

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which uses SIOCSIFCAPNV to set arbitrary string-named interface
capability.

Reviewed by:	hselasky, jhb, kp
Sponsored by:	NVIDIA Networking
MFC after:	3 weeks
Differential revision:	https://reviews.freebsd.org/D32551
This commit is contained in:
Konstantin Belousov 2021-12-15 05:05:18 +02:00
parent 42d5cb0927
commit 6ca418e481
2 changed files with 45 additions and 0 deletions
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43
sbin/ifconfig/ifconfig.c
View File

@ -44,6 +44,7 @@ static const char rcsid[] =
#include <sys/ioctl.h>
#include <sys/module.h>
#include <sys/linker.h>
#include <sys/nv.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/time.h>
@ -1253,6 +1254,48 @@ setifcap(const char *vname, int value, int s, const struct afswtch *afp)
Perror(vname);
}
void
setifcapnv(const char *vname, const char *arg, int s, const struct afswtch *afp)
{
nvlist_t *nvcap;
void *buf;
char *marg, *mopt;
size_t nvbuflen;
bool neg;
if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0)
Perror("ioctl (SIOCGIFCAP)");
if ((ifr.ifr_curcap & IFCAP_NV) == 0) {
warnx("IFCAP_NV not supported");
return; /* Not exit() */
}
marg = strdup(arg);
if (marg == NULL)
Perror("strdup");
nvcap = nvlist_create(0);
if (nvcap == NULL)
Perror("nvlist_create");
while ((mopt = strsep(&marg, ",")) != NULL) {
neg = *mopt == '-';
if (neg)
mopt++;
nvlist_add_bool(nvcap, mopt, !neg);
}
buf = nvlist_pack(nvcap, &nvbuflen);
if (buf == NULL) {
errx(1, "nvlist_pack error");
exit(1);
}
ifr.ifr_cap_nv.buf_length = ifr.ifr_cap_nv.length = nvbuflen;
ifr.ifr_cap_nv.buffer = buf;
if (ioctl(s, SIOCSIFCAPNV, (caddr_t)&ifr) < 0)
Perror(vname);
free(buf);
nvlist_destroy(nvcap);
free(marg);
}
static void
setifmetric(const char *val, int dummy __unused, int s,
const struct afswtch *afp)

2
sbin/ifconfig/ifconfig.h
View File

@ -202,6 +202,8 @@ extern int printifname;
extern int exit_code;
void setifcap(const char *, int value, int s, const struct afswtch *);
void setifcapnv(const char *vname, const char *arg, int s,
const struct afswtch *afp);
void Perror(const char *cmd);
void printb(const char *s, unsigned value, const char *bits);