diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2014-12-23 20:54:40 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-12-27 08:20:23 +0100 |
| commit | c380d9a7afff0e4c2e5f3c1c2dc7d2f4214dd962 (patch) | |
| tree | adc927b4f3fb05268c6ca808aee5d0109351fec1 /net/netlink | |
| parent | netlink: call unbind when releasing socket (diff) | |
| download | linux-c380d9a7afff0e4c2e5f3c1c2dc7d2f4214dd962.tar.xz linux-c380d9a7afff0e4c2e5f3c1c2dc7d2f4214dd962.zip | |
genetlink: pass multicast bind/unbind to families
In order to make the newly fixed multicast bind/unbind
functionality in generic netlink, pass them down to the
appropriate family.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netlink')
| -rw-r--r-- | net/netlink/genetlink.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c index 76393f2f4b22..05bf40bbd189 100644 --- a/net/netlink/genetlink.c +++ b/net/netlink/genetlink.c @@ -983,11 +983,70 @@ static struct genl_multicast_group genl_ctrl_groups[] = { { .name = "notify", }, }; +static int genl_bind(int group) +{ + int i, err; + bool found = false; + + down_read(&cb_lock); + for (i = 0; i < GENL_FAM_TAB_SIZE; i++) { + struct genl_family *f; + + list_for_each_entry(f, genl_family_chain(i), family_list) { + if (group >= f->mcgrp_offset && + group < f->mcgrp_offset + f->n_mcgrps) { + int fam_grp = group - f->mcgrp_offset; + + if (f->mcast_bind) + err = f->mcast_bind(fam_grp); + else + err = 0; + found = true; + break; + } + } + } + up_read(&cb_lock); + + if (WARN_ON(!found)) + err = 0; + + return err; +} + +static void genl_unbind(int group) +{ + int i; + bool found = false; + + down_read(&cb_lock); + for (i = 0; i < GENL_FAM_TAB_SIZE; i++) { + struct genl_family *f; + + list_for_each_entry(f, genl_family_chain(i), family_list) { + if (group >= f->mcgrp_offset && + group < f->mcgrp_offset + f->n_mcgrps) { + int fam_grp = group - f->mcgrp_offset; + + if (f->mcast_unbind) + f->mcast_unbind(fam_grp); + found = true; + break; + } + } + } + up_read(&cb_lock); + + WARN_ON(!found); +} + static int __net_init genl_pernet_init(struct net *net) { struct netlink_kernel_cfg cfg = { .input = genl_rcv, .flags = NL_CFG_F_NONROOT_RECV, + .bind = genl_bind, + .unbind = genl_unbind, }; /* we'll bump the group number right afterwards */ |