diff options
author | Benjamin Thery <benjamin.thery@bull.net> | 2008-12-11 03:27:21 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2008-12-11 03:27:21 +0300 |
commit | 4045e57c19bee150370390545ee8a933b3f7a18d (patch) | |
tree | a4744efeed6819eff5acd9c13ca0fafe71df144d /net | |
parent | 4a6258a0e33d042e4c84d9dec25d45ddb40a70b3 (diff) | |
download | linux-4045e57c19bee150370390545ee8a933b3f7a18d.tar.xz |
netns: ip6mr: declare counter cache_resolve_queue_len per-namespace
Preliminary work to make IPv6 multicast forwarding netns-aware.
Declare variable cache_resolve_queue_len per-namespace: moves it into
struct netns_ipv6.
This variable counts the number of unresolved cache entries queued in the
list mfc_unres_queue. This list is kept global to all netns as the number
of entries per namespace is limited to 10 (hardcoded in routine
ip6mr_cache_unresolved).
Entries belonging to different namespaces in mfc_unres_queue will be
identified by matching the mfc_net member introduced previously in
struct mfc6_cache.
Keeping this list global to all netns, also allows us to keep a single
timer (ipmr_expire_timer) to handle their expiration.
In some places cache_resolve_queue_len value was tested for arming
or deleting the timer. These tests were equivalent to testing
mfc_unres_queue value instead and are replaced in this patch.
At the moment, cache_resolve_queue_len is only referenced in init_net.
Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r-- | net/ipv6/ip6mr.c | 40 |
1 files changed, 21 insertions, 19 deletions
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c index 287e526ba036..077c8198eb53 100644 --- a/net/ipv6/ip6mr.c +++ b/net/ipv6/ip6mr.c @@ -69,7 +69,6 @@ static int mroute_do_pim; #endif static struct mfc6_cache *mfc_unres_queue; /* Queue of unresolved entries */ -static atomic_t cache_resolve_queue_len; /* Size of unresolved */ /* Special spinlock for queue of unresolved entries */ static DEFINE_SPINLOCK(mfc_unres_lock); @@ -519,7 +518,7 @@ static void ip6mr_destroy_unres(struct mfc6_cache *c) { struct sk_buff *skb; - atomic_dec(&cache_resolve_queue_len); + atomic_dec(&init_net.ipv6.cache_resolve_queue_len); while((skb = skb_dequeue(&c->mfc_un.unres.unresolved)) != NULL) { if (ipv6_hdr(skb)->version == 0) { @@ -561,7 +560,7 @@ static void ipmr_do_expire_process(unsigned long dummy) ip6mr_destroy_unres(c); } - if (atomic_read(&cache_resolve_queue_len)) + if (mfc_unres_queue != NULL) mod_timer(&ipmr_expire_timer, jiffies + expires); } @@ -572,7 +571,7 @@ static void ipmr_expire_process(unsigned long dummy) return; } - if (atomic_read(&cache_resolve_queue_len)) + if (mfc_unres_queue != NULL) ipmr_do_expire_process(dummy); spin_unlock(&mfc_unres_lock); @@ -852,7 +851,8 @@ ip6mr_cache_unresolved(mifi_t mifi, struct sk_buff *skb) spin_lock_bh(&mfc_unres_lock); for (c = mfc_unres_queue; c; c = c->next) { - if (ipv6_addr_equal(&c->mf6c_mcastgrp, &ipv6_hdr(skb)->daddr) && + if (net_eq(mfc6_net(c), &init_net) && + ipv6_addr_equal(&c->mf6c_mcastgrp, &ipv6_hdr(skb)->daddr) && ipv6_addr_equal(&c->mf6c_origin, &ipv6_hdr(skb)->saddr)) break; } @@ -862,7 +862,7 @@ ip6mr_cache_unresolved(mifi_t mifi, struct sk_buff *skb) * Create a new entry if allowable */ - if (atomic_read(&cache_resolve_queue_len) >= 10 || + if (atomic_read(&init_net.ipv6.cache_resolve_queue_len) >= 10 || (c = ip6mr_cache_alloc_unres(&init_net)) == NULL) { spin_unlock_bh(&mfc_unres_lock); @@ -891,7 +891,7 @@ ip6mr_cache_unresolved(mifi_t mifi, struct sk_buff *skb) return err; } - atomic_inc(&cache_resolve_queue_len); + atomic_inc(&init_net.ipv6.cache_resolve_queue_len); c->next = mfc_unres_queue; mfc_unres_queue = c; @@ -1119,14 +1119,16 @@ static int ip6mr_mfc_add(struct mf6cctl *mfc, int mrtsock) spin_lock_bh(&mfc_unres_lock); for (cp = &mfc_unres_queue; (uc = *cp) != NULL; cp = &uc->next) { - if (ipv6_addr_equal(&uc->mf6c_origin, &c->mf6c_origin) && + if (net_eq(mfc6_net(uc), &init_net) && + ipv6_addr_equal(&uc->mf6c_origin, &c->mf6c_origin) && ipv6_addr_equal(&uc->mf6c_mcastgrp, &c->mf6c_mcastgrp)) { *cp = uc->next; - if (atomic_dec_and_test(&cache_resolve_queue_len)) - del_timer(&ipmr_expire_timer); + atomic_dec(&init_net.ipv6.cache_resolve_queue_len); break; } } + if (mfc_unres_queue == NULL) + del_timer(&ipmr_expire_timer); spin_unlock_bh(&mfc_unres_lock); if (uc) { @@ -1172,18 +1174,18 @@ static void mroute_clean_tables(struct sock *sk) } } - if (atomic_read(&cache_resolve_queue_len) != 0) { - struct mfc6_cache *c; + if (atomic_read(&init_net.ipv6.cache_resolve_queue_len) != 0) { + struct mfc6_cache *c, **cp; spin_lock_bh(&mfc_unres_lock); - while (mfc_unres_queue != NULL) { - c = mfc_unres_queue; - mfc_unres_queue = c->next; - spin_unlock_bh(&mfc_unres_lock); - + cp = &mfc_unres_queue; + while ((c = *cp) != NULL) { + if (!net_eq(mfc6_net(c), &init_net)) { + cp = &c->next; + continue; + } + *cp = c->next; ip6mr_destroy_unres(c); - - spin_lock_bh(&mfc_unres_lock); } spin_unlock_bh(&mfc_unres_lock); } |