d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

MFC 204402

Browse Source 
Use reference counting instead of locking to secure an address while
that address is being used to generate temporary IPv6 address. This
approach is sufficient and avoids recursive locking.
This commit is contained in:
Qing Li 2010-03-08 21:30:12 +00:00
parent ca493fb650
commit 44520d2930
1 changed files with 6 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
sys/netinet6/nd6.c
View File

@ -759,22 +759,25 @@ regen_tmpaddr(struct in6_ifaddr *ia6)
*/
if (!IFA6_IS_DEPRECATED(it6))
public_ifa6 = it6;
if (public_ifa6 != NULL)
ifa_ref(&public_ifa6->ia_ifa);
}
IF_ADDR_UNLOCK(ifp);
if (public_ifa6 != NULL) {
int e;
if ((e = in6_tmpifadd(public_ifa6, 0, 0)) != 0) {
IF_ADDR_UNLOCK(ifp);
ifa_free(&public_ifa6->ia_ifa);
log(LOG_NOTICE, "regen_tmpaddr: failed to create a new"
" tmp addr,errno=%d\n", e);
return (-1);
}
IF_ADDR_UNLOCK(ifp);
ifa_free(&public_ifa6->ia_ifa);
return (0);
}
IF_ADDR_UNLOCK(ifp);
return (-1);
}