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net: rcu fixes

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Add hlist_for_each_entry_rcu_bh() and
hlist_for_each_entry_continue_rcu_bh() macros, and use them in
ipv6_get_ifaddr(), if6_get_first() and if6_get_next() to fix lockdeps
warnings.

Signed-off-by: Eric Dumazet <[email protected]>
Reviewed-by: "Paul E. McKenney" <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Eric Dumazet 2010-05-03 10:50:14 +00:00 • committed by David S. Miller
commit 4f70ecca9c
2 changed files with 37 additions and 8 deletions
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16
net/ipv6/addrconf.c
View file

@ -1346,7 +1346,7 @@ struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *add
struct hlist_node *node;
rcu_read_lock_bh();
hlist_for_each_entry_rcu(ifp, node, &inet6_addr_lst[hash], addr_lst) {
hlist_for_each_entry_rcu_bh(ifp, node, &inet6_addr_lst[hash], addr_lst) {
if (!net_eq(dev_net(ifp->idev->dev), net))
continue;
if (ipv6_addr_equal(&ifp->addr, addr)) {
@ -2959,7 +2959,7 @@ static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
struct hlist_node *n;
hlist_for_each_entry_rcu(ifa, n, &inet6_addr_lst[state->bucket],
hlist_for_each_entry_rcu_bh(ifa, n, &inet6_addr_lst[state->bucket],
addr_lst)
if (net_eq(dev_net(ifa->idev->dev), net))
return ifa;
@ -2974,12 +2974,12 @@ static struct inet6_ifaddr *if6_get_next(struct seq_file *seq,
struct net *net = seq_file_net(seq);
struct hlist_node *n = &ifa->addr_lst;
hlist_for_each_entry_continue_rcu(ifa, n, addr_lst)
hlist_for_each_entry_continue_rcu_bh(ifa, n, addr_lst)
if (net_eq(dev_net(ifa->idev->dev), net))
return ifa;
while (++state->bucket < IN6_ADDR_HSIZE) {
hlist_for_each_entry(ifa, n,
hlist_for_each_entry_rcu_bh(ifa, n,
&inet6_addr_lst[state->bucket], addr_lst) {
if (net_eq(dev_net(ifa->idev->dev), net))
return ifa;
@ -3000,7 +3000,7 @@ static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
}
static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
__acquires(rcu)
__acquires(rcu_bh)
{
rcu_read_lock_bh();
return if6_get_idx(seq, *pos);
@ -3016,7 +3016,7 @@ static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
}
static void if6_seq_stop(struct seq_file *seq, void *v)
__releases(rcu)
__releases(rcu_bh)
{
rcu_read_unlock_bh();
}
@ -3093,7 +3093,7 @@ int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr)
unsigned int hash = ipv6_addr_hash(addr);
rcu_read_lock_bh();
hlist_for_each_entry_rcu(ifp, n, &inet6_addr_lst[hash], addr_lst) {
hlist_for_each_entry_rcu_bh(ifp, n, &inet6_addr_lst[hash], addr_lst) {
if (!net_eq(dev_net(ifp->idev->dev), net))
continue;
if (ipv6_addr_equal(&ifp->addr, addr) &&
@ -3127,7 +3127,7 @@ static void addrconf_verify(unsigned long foo)
for (i = 0; i < IN6_ADDR_HSIZE; i++) {
restart:
hlist_for_each_entry_rcu(ifp, node,
hlist_for_each_entry_rcu_bh(ifp, node,
&inet6_addr_lst[i], addr_lst) {
unsigned long age;