diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/ipmr.c | 18 | ||||
| -rw-r--r-- | net/ipv4/ipmr_base.c | 43 | ||||
| -rw-r--r-- | net/ipv6/ip6mr.c | 18 |
3 files changed, 70 insertions, 9 deletions
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c index 44d777058960..3fa988e6a3df 100644 --- a/net/ipv4/ipmr.c +++ b/net/ipv4/ipmr.c @@ -2528,18 +2528,30 @@ errout_free: static int ipmr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb) { struct fib_dump_filter filter = {}; + int err; if (cb->strict_check) { - int err; - err = ip_valid_fib_dump_req(sock_net(skb->sk), cb->nlh, &filter, cb->extack); if (err < 0) return err; } + if (filter.table_id) { + struct mr_table *mrt; + + mrt = ipmr_get_table(sock_net(skb->sk), filter.table_id); + if (!mrt) { + NL_SET_ERR_MSG(cb->extack, "ipv4: MR table does not exist"); + return -ENOENT; + } + err = mr_table_dump(mrt, skb, cb, _ipmr_fill_mroute, + &mfc_unres_lock, &filter); + return skb->len ? : err; + } + return mr_rtm_dumproute(skb, cb, ipmr_mr_table_iter, - _ipmr_fill_mroute, &mfc_unres_lock); + _ipmr_fill_mroute, &mfc_unres_lock, &filter); } static const struct nla_policy rtm_ipmr_policy[RTA_MAX + 1] = { diff --git a/net/ipv4/ipmr_base.c b/net/ipv4/ipmr_base.c index 132dd2613ca5..844806120f44 100644 --- a/net/ipv4/ipmr_base.c +++ b/net/ipv4/ipmr_base.c @@ -268,21 +268,45 @@ int mr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb, } EXPORT_SYMBOL(mr_fill_mroute); +static bool mr_mfc_uses_dev(const struct mr_table *mrt, + const struct mr_mfc *c, + const struct net_device *dev) +{ + int ct; + + for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) { + if (VIF_EXISTS(mrt, ct) && c->mfc_un.res.ttls[ct] < 255) { + const struct vif_device *vif; + + vif = &mrt->vif_table[ct]; + if (vif->dev == dev) + return true; + } + } + return false; +} + int mr_table_dump(struct mr_table *mrt, struct sk_buff *skb, struct netlink_callback *cb, int (*fill)(struct mr_table *mrt, struct sk_buff *skb, u32 portid, u32 seq, struct mr_mfc *c, int cmd, int flags), - spinlock_t *lock) + spinlock_t *lock, struct fib_dump_filter *filter) { unsigned int e = 0, s_e = cb->args[1]; unsigned int flags = NLM_F_MULTI; struct mr_mfc *mfc; int err; + if (filter->filter_set) + flags |= NLM_F_DUMP_FILTERED; + list_for_each_entry_rcu(mfc, &mrt->mfc_cache_list, list) { if (e < s_e) goto next_entry; + if (filter->dev && + !mr_mfc_uses_dev(mrt, mfc, filter->dev)) + goto next_entry; err = fill(mrt, skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, mfc, RTM_NEWROUTE, flags); @@ -298,6 +322,9 @@ next_entry: list_for_each_entry(mfc, &mrt->mfc_unres_queue, list) { if (e < s_e) goto next_entry2; + if (filter->dev && + !mr_mfc_uses_dev(mrt, mfc, filter->dev)) + goto next_entry2; err = fill(mrt, skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, mfc, RTM_NEWROUTE, flags); @@ -316,6 +343,7 @@ out: cb->args[1] = e; return err; } +EXPORT_SYMBOL(mr_table_dump); int mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb, struct mr_table *(*iter)(struct net *net, @@ -324,19 +352,28 @@ int mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb, struct sk_buff *skb, u32 portid, u32 seq, struct mr_mfc *c, int cmd, int flags), - spinlock_t *lock) + spinlock_t *lock, struct fib_dump_filter *filter) { unsigned int t = 0, s_t = cb->args[0]; struct net *net = sock_net(skb->sk); struct mr_table *mrt; int err; + /* multicast does not track protocol or have route type other + * than RTN_MULTICAST + */ + if (filter->filter_set) { + if (filter->protocol || filter->flags || + (filter->rt_type && filter->rt_type != RTN_MULTICAST)) + return skb->len; + } + rcu_read_lock(); for (mrt = iter(net, NULL); mrt; mrt = iter(net, mrt)) { if (t < s_t) goto next_table; - err = mr_table_dump(mrt, skb, cb, fill, lock); + err = mr_table_dump(mrt, skb, cb, fill, lock, filter); if (err < 0) break; next_table: diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c index dbd5166c5599..9759b0aecdd6 100644 --- a/net/ipv6/ip6mr.c +++ b/net/ipv6/ip6mr.c @@ -2459,16 +2459,28 @@ static int ip6mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb) { const struct nlmsghdr *nlh = cb->nlh; struct fib_dump_filter filter = {}; + int err; if (cb->strict_check) { - int err; - err = ip_valid_fib_dump_req(sock_net(skb->sk), nlh, &filter, cb->extack); if (err < 0) return err; } + if (filter.table_id) { + struct mr_table *mrt; + + mrt = ip6mr_get_table(sock_net(skb->sk), filter.table_id); + if (!mrt) { + NL_SET_ERR_MSG_MOD(cb->extack, "MR table does not exist"); + return -ENOENT; + } + err = mr_table_dump(mrt, skb, cb, _ip6mr_fill_mroute, + &mfc_unres_lock, &filter); + return skb->len ? : err; + } + return mr_rtm_dumproute(skb, cb, ip6mr_mr_table_iter, - _ip6mr_fill_mroute, &mfc_unres_lock); + _ip6mr_fill_mroute, &mfc_unres_lock, &filter); } |