diff options
Diffstat (limited to 'net/netlink/af_netlink.c')
-rw-r--r-- | net/netlink/af_netlink.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index 69d67c3..dea9253 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -2290,6 +2290,28 @@ static int netlink_getsockopt(struct socket *sock, int level, int optname, return -EFAULT; err = 0; break; + case NETLINK_LIST_MEMBERSHIPS: { + int pos, idx, shift; + + err = 0; + netlink_table_grab(); + for (pos = 0; pos * 8 < nlk->ngroups; pos += sizeof(u32)) { + if (len - pos < sizeof(u32)) + break; + + idx = pos / sizeof(unsigned long); + shift = (pos % sizeof(unsigned long)) * 8; + if (put_user((u32)(nlk->groups[idx] >> shift), + (u32 __user *)(optval + pos))) { + err = -EFAULT; + break; + } + } + if (put_user(ALIGN(nlk->ngroups / 8, sizeof(u32)), optlen)) + err = -EFAULT; + netlink_table_ungrab(); + break; + } default: err = -ENOPROTOOPT; } |