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ipvs: do not disable bh for long time 

We used a global BH disable in LOCAL_OUT hook.
Add _bh suffix to all places that need it and remove
the disabling from LOCAL_OUT and sync code.

Functions like ip_defrag need protection from
BH, so add it. As for nf_nat_mangle_tcp_packet, it needs
RCU lock.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
This commit is contained in:
Julian Anastasov 2013-03-22 11:46:54 +02:00 committed by Pablo Neira Ayuso
parent ceec4c3816
commit ac69269a45
12 changed files with 64 additions and 87 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
net/netfilter/ipvs/ip_vs_app.c
View File

@ -352,14 +352,14 @@ static inline void vs_seq_update(struct ip_vs_conn *cp, struct ip_vs_seq *vseq,
unsigned int flag, __u32 seq, int diff)
{
/* spinlock is to keep updating cp->flags atomic */
spin_lock(&cp->lock);
spin_lock_bh(&cp->lock);
if (!(cp->flags & flag) || after(seq, vseq->init_seq)) {
vseq->previous_delta = vseq->delta;
vseq->delta += diff;
vseq->init_seq = seq;
cp->flags |= flag;
}
spin_unlock(&cp->lock);
spin_unlock_bh(&cp->lock);
}
static inline int app_tcp_pkt_out(struct ip_vs_conn *cp, struct sk_buff *skb,

30
net/netfilter/ipvs/ip_vs_conn.c
View File

@ -86,14 +86,14 @@ struct ip_vs_aligned_lock
static struct ip_vs_aligned_lock
__ip_vs_conntbl_lock_array[CT_LOCKARRAY_SIZE] __cacheline_aligned;
static inline void ct_write_lock(unsigned int key)
static inline void ct_write_lock_bh(unsigned int key)
{
spin_lock(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l);
spin_lock_bh(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l);
}
static inline void ct_write_unlock(unsigned int key)
static inline void ct_write_unlock_bh(unsigned int key)
{
spin_unlock(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l);
spin_unlock_bh(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l);
}
@ -167,7 +167,7 @@ static inline int ip_vs_conn_hash(struct ip_vs_conn *cp)
/* Hash by protocol, client address and port */
hash = ip_vs_conn_hashkey_conn(cp);
ct_write_lock(hash);
ct_write_lock_bh(hash);
spin_lock(&cp->lock);
if (!(cp->flags & IP_VS_CONN_F_HASHED)) {
@ -182,7 +182,7 @@ static inline int ip_vs_conn_hash(struct ip_vs_conn *cp)
}
spin_unlock(&cp->lock);
ct_write_unlock(hash);
ct_write_unlock_bh(hash);
return ret;
}
@ -200,7 +200,7 @@ static inline int ip_vs_conn_unhash(struct ip_vs_conn *cp)
/* unhash it and decrease its reference counter */
hash = ip_vs_conn_hashkey_conn(cp);
ct_write_lock(hash);
ct_write_lock_bh(hash);
spin_lock(&cp->lock);
if (cp->flags & IP_VS_CONN_F_HASHED) {
@ -212,7 +212,7 @@ static inline int ip_vs_conn_unhash(struct ip_vs_conn *cp)
ret = 0;
spin_unlock(&cp->lock);
ct_write_unlock(hash);
ct_write_unlock_bh(hash);
return ret;
}
@ -227,7 +227,7 @@ static inline bool ip_vs_conn_unlink(struct ip_vs_conn *cp)
hash = ip_vs_conn_hashkey_conn(cp);
ct_write_lock(hash);
ct_write_lock_bh(hash);
spin_lock(&cp->lock);
if (cp->flags & IP_VS_CONN_F_HASHED) {
@ -242,7 +242,7 @@ static inline bool ip_vs_conn_unlink(struct ip_vs_conn *cp)
ret = atomic_read(&cp->refcnt) ? false : true;
spin_unlock(&cp->lock);
ct_write_unlock(hash);
ct_write_unlock_bh(hash);
return ret;
}
@ -462,13 +462,13 @@ void ip_vs_conn_put(struct ip_vs_conn *cp)
void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport)
{
if (ip_vs_conn_unhash(cp)) {
spin_lock(&cp->lock);
spin_lock_bh(&cp->lock);
if (cp->flags & IP_VS_CONN_F_NO_CPORT) {
atomic_dec(&ip_vs_conn_no_cport_cnt);
cp->flags &= ~IP_VS_CONN_F_NO_CPORT;
cp->cport = cport;
}
spin_unlock(&cp->lock);
spin_unlock_bh(&cp->lock);
/* hash on new dport */
ip_vs_conn_hash(cp);
@ -622,9 +622,9 @@ void ip_vs_try_bind_dest(struct ip_vs_conn *cp)
if (dest) {
struct ip_vs_proto_data *pd;
spin_lock(&cp->lock);
spin_lock_bh(&cp->lock);
if (cp->dest) {
spin_unlock(&cp->lock);
spin_unlock_bh(&cp->lock);
rcu_read_unlock();
return;
}
@ -635,7 +635,7 @@ void ip_vs_try_bind_dest(struct ip_vs_conn *cp)
ip_vs_unbind_app(cp);
ip_vs_bind_dest(cp, dest);
spin_unlock(&cp->lock);
spin_unlock_bh(&cp->lock);
/* Update its packet transmitter */
cp->packet_xmit = NULL;

37
net/netfilter/ipvs/ip_vs_core.c
View File

@ -638,8 +638,11 @@ static inline enum ip_defrag_users ip_vs_defrag_user(unsigned int hooknum)
static inline int ip_vs_gather_frags(struct sk_buff *skb, u_int32_t user)
{
int err = ip_defrag(skb, user);
int err;
local_bh_disable();
err = ip_defrag(skb, user);
local_bh_enable();
if (!err)
ip_send_check(ip_hdr(skb));
@ -1217,13 +1220,7 @@ ip_vs_local_reply4(unsigned int hooknum, struct sk_buff *skb,
const struct net_device *in, const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
unsigned int verdict;
/* Disable BH in LOCAL_OUT until all places are fixed */
local_bh_disable();
verdict = ip_vs_out(hooknum, skb, AF_INET);
local_bh_enable();
return verdict;
return ip_vs_out(hooknum, skb, AF_INET);
}
#ifdef CONFIG_IP_VS_IPV6
@ -1250,13 +1247,7 @@ ip_vs_local_reply6(unsigned int hooknum, struct sk_buff *skb,
const struct net_device *in, const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
unsigned int verdict;
/* Disable BH in LOCAL_OUT until all places are fixed */
local_bh_disable();
verdict = ip_vs_out(hooknum, skb, AF_INET6);
local_bh_enable();
return verdict;
return ip_vs_out(hooknum, skb, AF_INET6);
}
#endif
@ -1714,13 +1705,7 @@ ip_vs_local_request4(unsigned int hooknum, struct sk_buff *skb,
const struct net_device *in, const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
unsigned int verdict;
/* Disable BH in LOCAL_OUT until all places are fixed */
local_bh_disable();
verdict = ip_vs_in(hooknum, skb, AF_INET);
local_bh_enable();
return verdict;
return ip_vs_in(hooknum, skb, AF_INET);
}
#ifdef CONFIG_IP_VS_IPV6
@ -1779,13 +1764,7 @@ ip_vs_local_request6(unsigned int hooknum, struct sk_buff *skb,
const struct net_device *in, const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
unsigned int verdict;
/* Disable BH in LOCAL_OUT until all places are fixed */
local_bh_disable();
verdict = ip_vs_in(hooknum, skb, AF_INET6);
local_bh_enable();
return verdict;
return ip_vs_in(hooknum, skb, AF_INET6);
}
#endif

2
net/netfilter/ipvs/ip_vs_ftp.c
View File

@ -267,10 +267,12 @@ static int ip_vs_ftp_out(struct ip_vs_app *app, struct ip_vs_conn *cp,
* hopefully it will succeed on the retransmitted
* packet.
*/
rcu_read_lock();
ret = nf_nat_mangle_tcp_packet(skb, ct, ctinfo,
iph->ihl * 4,
start-data, end-start,
buf, buf_len);
rcu_read_unlock();
if (ret) {
ip_vs_nfct_expect_related(skb, ct, n_cp,
IPPROTO_TCP, 0, 0);

4
net/netfilter/ipvs/ip_vs_lblc.c
View File

@ -527,10 +527,10 @@ ip_vs_lblc_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
}
/* If we fail to create a cache entry, we'll just use the valid dest */
spin_lock(&svc->sched_lock);
spin_lock_bh(&svc->sched_lock);
if (!tbl->dead)
ip_vs_lblc_new(tbl, &iph.daddr, dest);
spin_unlock(&svc->sched_lock);
spin_unlock_bh(&svc->sched_lock);
out:
IP_VS_DBG_BUF(6, "LBLC: destination IP address %s --> server %s:%d\n",

12
net/netfilter/ipvs/ip_vs_lblcr.c
View File

@ -678,7 +678,7 @@ ip_vs_lblcr_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
if (atomic_read(&en->set.size) > 1 &&
time_after(jiffies, en->set.lastmod +
sysctl_lblcr_expiration(svc))) {
spin_lock(&svc->sched_lock);
spin_lock_bh(&svc->sched_lock);
if (atomic_read(&en->set.size) > 1) {
struct ip_vs_dest *m;
@ -686,7 +686,7 @@ ip_vs_lblcr_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
if (m)
ip_vs_dest_set_erase(&en->set, m);
}
spin_unlock(&svc->sched_lock);
spin_unlock_bh(&svc->sched_lock);
}
/* If the destination is not overloaded, use it */
@ -701,10 +701,10 @@ ip_vs_lblcr_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
}
/* Update our cache entry */
spin_lock(&svc->sched_lock);
spin_lock_bh(&svc->sched_lock);
if (!tbl->dead)
ip_vs_dest_set_insert(&en->set, dest, true);
spin_unlock(&svc->sched_lock);
spin_unlock_bh(&svc->sched_lock);
goto out;
}
@ -716,10 +716,10 @@ ip_vs_lblcr_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
}
/* If we fail to create a cache entry, we'll just use the valid dest */
spin_lock(&svc->sched_lock);
spin_lock_bh(&svc->sched_lock);
if (!tbl->dead)
ip_vs_lblcr_new(tbl, &iph.daddr, dest);
spin_unlock(&svc->sched_lock);
spin_unlock_bh(&svc->sched_lock);
out:
IP_VS_DBG_BUF(6, "LBLCR: destination IP address %s --> server %s:%d\n",

4
net/netfilter/ipvs/ip_vs_proto_sctp.c
View File

@ -994,9 +994,9 @@ static void
sctp_state_transition(struct ip_vs_conn *cp, int direction,
const struct sk_buff *skb, struct ip_vs_proto_data *pd)
{
spin_lock(&cp->lock);
spin_lock_bh(&cp->lock);
set_sctp_state(pd, cp, direction, skb);
spin_unlock(&cp->lock);
spin_unlock_bh(&cp->lock);
}
static inline __u16 sctp_app_hashkey(__be16 port)

8
net/netfilter/ipvs/ip_vs_proto_tcp.c
View File

@ -557,9 +557,9 @@ tcp_state_transition(struct ip_vs_conn *cp, int direction,
if (th == NULL)
return;
spin_lock(&cp->lock);
spin_lock_bh(&cp->lock);
set_tcp_state(pd, cp, direction, th);
spin_unlock(&cp->lock);
spin_unlock_bh(&cp->lock);
}
static inline __u16 tcp_app_hashkey(__be16 port)
@ -655,11 +655,11 @@ void ip_vs_tcp_conn_listen(struct net *net, struct ip_vs_conn *cp)
{
struct ip_vs_proto_data *pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
spin_lock(&cp->lock);
spin_lock_bh(&cp->lock);
cp->state = IP_VS_TCP_S_LISTEN;
cp->timeout = (pd ? pd->timeout_table[IP_VS_TCP_S_LISTEN]
: tcp_timeouts[IP_VS_TCP_S_LISTEN]);
spin_unlock(&cp->lock);
spin_unlock_bh(&cp->lock);
}
/* ---------------------------------------------

6
net/netfilter/ipvs/ip_vs_rr.c
View File

@ -63,7 +63,7 @@ ip_vs_rr_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
IP_VS_DBG(6, "%s(): Scheduling...\n", __func__);
spin_lock(&svc->sched_lock);
spin_lock_bh(&svc->sched_lock);
p = (struct list_head *) svc->sched_data;
last = dest = list_entry(p, struct ip_vs_dest, n_list);
@ -85,13 +85,13 @@ ip_vs_rr_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
} while (pass < 2 && p != &svc->destinations);
stop:
spin_unlock(&svc->sched_lock);
spin_unlock_bh(&svc->sched_lock);
ip_vs_scheduler_err(svc, "no destination available");
return NULL;
out:
svc->sched_data = &dest->n_list;
spin_unlock(&svc->sched_lock);
spin_unlock_bh(&svc->sched_lock);
IP_VS_DBG_BUF(6, "RR: server %s:%u "
"activeconns %d refcnt %d weight %d\n",
IP_VS_DBG_ADDR(svc->af, &dest->addr), ntohs(dest->port),

24
net/netfilter/ipvs/ip_vs_sync.c
View File

@ -531,9 +531,9 @@ static void ip_vs_sync_conn_v0(struct net *net, struct ip_vs_conn *cp,
if (!ip_vs_sync_conn_needed(ipvs, cp, pkts))
return;
spin_lock(&ipvs->sync_buff_lock);
spin_lock_bh(&ipvs->sync_buff_lock);
if (!(ipvs->sync_state & IP_VS_STATE_MASTER)) {
spin_unlock(&ipvs->sync_buff_lock);
spin_unlock_bh(&ipvs->sync_buff_lock);
return;
}
@ -552,7 +552,7 @@ static void ip_vs_sync_conn_v0(struct net *net, struct ip_vs_conn *cp,
if (!buff) {
buff = ip_vs_sync_buff_create_v0(ipvs);
if (!buff) {
spin_unlock(&ipvs->sync_buff_lock);
spin_unlock_bh(&ipvs->sync_buff_lock);
pr_err("ip_vs_sync_buff_create failed.\n");
return;
}
@ -590,7 +590,7 @@ static void ip_vs_sync_conn_v0(struct net *net, struct ip_vs_conn *cp,
sb_queue_tail(ipvs, ms);
ms->sync_buff = NULL;
}
spin_unlock(&ipvs->sync_buff_lock);
spin_unlock_bh(&ipvs->sync_buff_lock);
/* synchronize its controller if it has */
cp = cp->control;
@ -641,9 +641,9 @@ sloop:
pe_name_len = strnlen(cp->pe->name, IP_VS_PENAME_MAXLEN);
}
spin_lock(&ipvs->sync_buff_lock);
spin_lock_bh(&ipvs->sync_buff_lock);
if (!(ipvs->sync_state & IP_VS_STATE_MASTER)) {
spin_unlock(&ipvs->sync_buff_lock);
spin_unlock_bh(&ipvs->sync_buff_lock);
return;
}
@ -683,7 +683,7 @@ sloop:
if (!buff) {
buff = ip_vs_sync_buff_create(ipvs);
if (!buff) {
spin_unlock(&ipvs->sync_buff_lock);
spin_unlock_bh(&ipvs->sync_buff_lock);
pr_err("ip_vs_sync_buff_create failed.\n");
return;
}
@ -750,7 +750,7 @@ sloop:
}
}
spin_unlock(&ipvs->sync_buff_lock);
spin_unlock_bh(&ipvs->sync_buff_lock);
control:
/* synchronize its controller if it has */
@ -843,7 +843,7 @@ static void ip_vs_proc_conn(struct net *net, struct ip_vs_conn_param *param,
kfree(param->pe_data);
dest = cp->dest;
spin_lock(&cp->lock);
spin_lock_bh(&cp->lock);
if ((cp->flags ^ flags) & IP_VS_CONN_F_INACTIVE &&
!(flags & IP_VS_CONN_F_TEMPLATE) && dest) {
if (flags & IP_VS_CONN_F_INACTIVE) {
@ -857,7 +857,7 @@ static void ip_vs_proc_conn(struct net *net, struct ip_vs_conn_param *param,
flags &= IP_VS_CONN_F_BACKUP_UPD_MASK;
flags |= cp->flags & ~IP_VS_CONN_F_BACKUP_UPD_MASK;
cp->flags = flags;
spin_unlock(&cp->lock);
spin_unlock_bh(&cp->lock);
if (!dest)
ip_vs_try_bind_dest(cp);
} else {
@ -1689,11 +1689,7 @@ static int sync_thread_backup(void *data)
break;
}
/* disable bottom half, because it accesses the data
shared by softirq while getting/creating conns */
local_bh_disable();
ip_vs_process_message(tinfo->net, tinfo->buf, len);
local_bh_enable();
}
}

4
net/netfilter/ipvs/ip_vs_wrr.c
View File

@ -170,7 +170,7 @@ ip_vs_wrr_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
IP_VS_DBG(6, "%s(): Scheduling...\n", __func__);
spin_lock(&svc->sched_lock);
spin_lock_bh(&svc->sched_lock);
dest = mark->cl;
/* No available dests? */
if (mark->mw == 0)
@ -222,7 +222,7 @@ found:
mark->cl = dest;
out:
spin_unlock(&svc->sched_lock);
spin_unlock_bh(&svc->sched_lock);
return dest;
err_noavail:

16
net/netfilter/ipvs/ip_vs_xmit.c
View File

@ -177,22 +177,22 @@ __ip_vs_get_out_rt(struct sk_buff *skb, struct ip_vs_dest *dest,
rt = (struct rtable *) dest_dst->dst_cache;
else {
dest_dst = ip_vs_dest_dst_alloc();
spin_lock(&dest->dst_lock);
spin_lock_bh(&dest->dst_lock);
if (!dest_dst) {
__ip_vs_dst_set(dest, NULL, NULL, 0);
spin_unlock(&dest->dst_lock);
spin_unlock_bh(&dest->dst_lock);
goto err_unreach;
}
rt = do_output_route4(net, dest->addr.ip, rt_mode,
&dest_dst->dst_saddr.ip);
if (!rt) {
__ip_vs_dst_set(dest, NULL, NULL, 0);
spin_unlock(&dest->dst_lock);
spin_unlock_bh(&dest->dst_lock);
ip_vs_dest_dst_free(dest_dst);
goto err_unreach;
}
__ip_vs_dst_set(dest, dest_dst, &rt->dst, 0);
spin_unlock(&dest->dst_lock);
spin_unlock_bh(&dest->dst_lock);
IP_VS_DBG(10, "new dst %pI4, src %pI4, refcnt=%d\n",
&dest->addr.ip, &dest_dst->dst_saddr.ip,
atomic_read(&rt->dst.__refcnt));
@ -358,10 +358,10 @@ __ip_vs_get_out_rt_v6(struct sk_buff *skb, struct ip_vs_dest *dest,
u32 cookie;
dest_dst = ip_vs_dest_dst_alloc();
spin_lock(&dest->dst_lock);
spin_lock_bh(&dest->dst_lock);
if (!dest_dst) {
__ip_vs_dst_set(dest, NULL, NULL, 0);
spin_unlock(&dest->dst_lock);
spin_unlock_bh(&dest->dst_lock);
goto err_unreach;
}
dst = __ip_vs_route_output_v6(net, &dest->addr.in6,
@ -369,14 +369,14 @@ __ip_vs_get_out_rt_v6(struct sk_buff *skb, struct ip_vs_dest *dest,
do_xfrm);
if (!dst) {
__ip_vs_dst_set(dest, NULL, NULL, 0);
spin_unlock(&dest->dst_lock);
spin_unlock_bh(&dest->dst_lock);
ip_vs_dest_dst_free(dest_dst);
goto err_unreach;
}
rt = (struct rt6_info *) dst;
cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
__ip_vs_dst_set(dest, dest_dst, &rt->dst, cookie);
spin_unlock(&dest->dst_lock);
spin_unlock_bh(&dest->dst_lock);
IP_VS_DBG(10, "new dst %pI6, src %pI6, refcnt=%d\n",
&dest->addr.in6, &dest_dst->dst_saddr.in6,
atomic_read(&rt->dst.__refcnt));