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net: add if_allocdescr() to permit updating iface description from the kernel

Browse Source 
Reviewed by:	kp,zlei
Differential Revision: https://reviews.freebsd.org/D37566
MFC after:	2 weeks
This commit is contained in:
Alexander V. Chernikov 2022-11-30 13:49:07 +00:00
parent 6f9c622690
commit 984b27d879
2 changed files with 9 additions and 2 deletions
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10
sys/net/if.c
View File

@ -2610,8 +2610,7 @@ ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
else if (ifr_buffer_get_length(ifr) == 0)
descrbuf = NULL;
else {
descrbuf = malloc(ifr_buffer_get_length(ifr),
M_IFDESCR, M_WAITOK | M_ZERO);
descrbuf = if_allocdescr(ifr_buffer_get_length(ifr), M_WAITOK);
error = copyin(ifr_buffer_get_buffer(ifr), descrbuf,
ifr_buffer_get_length(ifr) - 1);
if (error) {
@ -4273,6 +4272,13 @@ if_setdescr(if_t ifp, char *descrbuf)
if_freedescr(odescrbuf);
}
char *
if_allocdescr(size_t sz, int malloc_flag)
{
malloc_flag &= (M_WAITOK | M_NOWAIT);
return (malloc(sz, M_IFDESCR, M_ZERO | malloc_flag));
}
void
if_freedescr(char *descrbuf)
{

1
sys/net/if_var.h
View File

@ -740,6 +740,7 @@ int if_setcapenablebit(if_t ifp, int setcap, int clearcap);
int if_getcapenable(if_t ifp);
const char *if_getdname(if_t ifp);
void if_setdescr(if_t ifp, char *descrbuf);
char *if_allocdescr(size_t sz, int malloc_flag);
void if_freedescr(char *descrbuf);
int if_setdev(if_t ifp, void *dev);
int if_setdrvflagbits(if_t ifp, int if_setflags, int clear_flags);