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-rw-r--r--net/ipv6/netfilter/ip6_tables.c65
1 files changed, 16 insertions, 49 deletions
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index a1190ee14723..80a7f0d38aa4 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -283,15 +283,13 @@ static void trace_packet(const struct sk_buff *skb,
const struct xt_table_info *private,
const struct ip6t_entry *e)
{
- const void *table_base;
const struct ip6t_entry *root;
const char *hookname, *chainname, *comment;
const struct ip6t_entry *iter;
unsigned int rulenum = 0;
struct net *net = dev_net(in ? in : out);
- table_base = private->entries[smp_processor_id()];
- root = get_entry(table_base, private->hook_entry[hook]);
+ root = get_entry(private->entries, private->hook_entry[hook]);
hookname = chainname = hooknames[hook];
comment = comments[NF_IP6_TRACE_COMMENT_RULE];
@@ -357,7 +355,7 @@ ip6t_do_table(struct sk_buff *skb,
*/
smp_read_barrier_depends();
cpu = smp_processor_id();
- table_base = private->entries[cpu];
+ table_base = private->entries;
jumpstack = (struct ip6t_entry **)private->jumpstack[cpu];
stackptr = per_cpu_ptr(private->stackptr, cpu);
origptr = *stackptr;
@@ -890,12 +888,6 @@ translate_table(struct net *net, struct xt_table_info *newinfo, void *entry0,
return ret;
}
- /* And one copy for every other CPU */
- for_each_possible_cpu(i) {
- if (newinfo->entries[i] && newinfo->entries[i] != entry0)
- memcpy(newinfo->entries[i], entry0, newinfo->size);
- }
-
return ret;
}
@@ -911,7 +903,7 @@ get_counters(const struct xt_table_info *t,
seqcount_t *s = &per_cpu(xt_recseq, cpu);
i = 0;
- xt_entry_foreach(iter, t->entries[cpu], t->size) {
+ xt_entry_foreach(iter, t->entries, t->size) {
struct xt_counters *tmp;
u64 bcnt, pcnt;
unsigned int start;
@@ -959,17 +951,13 @@ copy_entries_to_user(unsigned int total_size,
struct xt_counters *counters;
const struct xt_table_info *private = table->private;
int ret = 0;
- const void *loc_cpu_entry;
+ void *loc_cpu_entry;
counters = alloc_counters(table);
if (IS_ERR(counters))
return PTR_ERR(counters);
- /* choose the copy that is on our node/cpu, ...
- * This choice is lazy (because current thread is
- * allowed to migrate to another cpu)
- */
- loc_cpu_entry = private->entries[raw_smp_processor_id()];
+ loc_cpu_entry = private->entries;
if (copy_to_user(userptr, loc_cpu_entry, total_size) != 0) {
ret = -EFAULT;
goto free_counters;
@@ -1083,10 +1071,10 @@ static int compat_table_info(const struct xt_table_info *info,
if (!newinfo || !info)
return -EINVAL;
- /* we dont care about newinfo->entries[] */
+ /* we dont care about newinfo->entries */
memcpy(newinfo, info, offsetof(struct xt_table_info, entries));
newinfo->initial_entries = 0;
- loc_cpu_entry = info->entries[raw_smp_processor_id()];
+ loc_cpu_entry = info->entries;
xt_compat_init_offsets(AF_INET6, info->number);
xt_entry_foreach(iter, loc_cpu_entry, info->size) {
ret = compat_calc_entry(iter, info, loc_cpu_entry, newinfo);
@@ -1207,7 +1195,6 @@ __do_replace(struct net *net, const char *name, unsigned int valid_hooks,
struct xt_table *t;
struct xt_table_info *oldinfo;
struct xt_counters *counters;
- const void *loc_cpu_old_entry;
struct ip6t_entry *iter;
ret = 0;
@@ -1250,8 +1237,7 @@ __do_replace(struct net *net, const char *name, unsigned int valid_hooks,
get_counters(oldinfo, counters);
/* Decrease module usage counts and free resource */
- loc_cpu_old_entry = oldinfo->entries[raw_smp_processor_id()];
- xt_entry_foreach(iter, loc_cpu_old_entry, oldinfo->size)
+ xt_entry_foreach(iter, oldinfo->entries, oldinfo->size)
cleanup_entry(iter, net);
xt_free_table_info(oldinfo);
@@ -1297,8 +1283,7 @@ do_replace(struct net *net, const void __user *user, unsigned int len)
if (!newinfo)
return -ENOMEM;
- /* choose the copy that is on our node/cpu */
- loc_cpu_entry = newinfo->entries[raw_smp_processor_id()];
+ loc_cpu_entry = newinfo->entries;
if (copy_from_user(loc_cpu_entry, user + sizeof(tmp),
tmp.size) != 0) {
ret = -EFAULT;
@@ -1329,7 +1314,7 @@ static int
do_add_counters(struct net *net, const void __user *user, unsigned int len,
int compat)
{
- unsigned int i, curcpu;
+ unsigned int i;
struct xt_counters_info tmp;
struct xt_counters *paddc;
unsigned int num_counters;
@@ -1339,7 +1324,6 @@ do_add_counters(struct net *net, const void __user *user, unsigned int len,
struct xt_table *t;
const struct xt_table_info *private;
int ret = 0;
- const void *loc_cpu_entry;
struct ip6t_entry *iter;
unsigned int addend;
#ifdef CONFIG_COMPAT
@@ -1395,11 +1379,8 @@ do_add_counters(struct net *net, const void __user *user, unsigned int len,
}
i = 0;
- /* Choose the copy that is on our node */
- curcpu = smp_processor_id();
addend = xt_write_recseq_begin();
- loc_cpu_entry = private->entries[curcpu];
- xt_entry_foreach(iter, loc_cpu_entry, private->size) {
+ xt_entry_foreach(iter, private->entries, private->size) {
struct xt_counters *tmp;
tmp = xt_get_this_cpu_counter(&iter->counters);
@@ -1407,7 +1388,6 @@ do_add_counters(struct net *net, const void __user *user, unsigned int len,
++i;
}
xt_write_recseq_end(addend);
-
unlock_up_free:
local_bh_enable();
xt_table_unlock(t);
@@ -1750,7 +1730,7 @@ translate_compat_table(struct net *net,
newinfo->hook_entry[i] = info->hook_entry[i];
newinfo->underflow[i] = info->underflow[i];
}
- entry1 = newinfo->entries[raw_smp_processor_id()];
+ entry1 = newinfo->entries;
pos = entry1;
size = total_size;
xt_entry_foreach(iter0, entry0, total_size) {
@@ -1802,11 +1782,6 @@ translate_compat_table(struct net *net,
return ret;
}
- /* And one copy for every other CPU */
- for_each_possible_cpu(i)
- if (newinfo->entries[i] && newinfo->entries[i] != entry1)
- memcpy(newinfo->entries[i], entry1, newinfo->size);
-
*pinfo = newinfo;
*pentry0 = entry1;
xt_free_table_info(info);
@@ -1853,8 +1828,7 @@ compat_do_replace(struct net *net, void __user *user, unsigned int len)
if (!newinfo)
return -ENOMEM;
- /* choose the copy that is on our node/cpu */
- loc_cpu_entry = newinfo->entries[raw_smp_processor_id()];
+ loc_cpu_entry = newinfo->entries;
if (copy_from_user(loc_cpu_entry, user + sizeof(tmp),
tmp.size) != 0) {
ret = -EFAULT;
@@ -1925,7 +1899,6 @@ compat_copy_entries_to_user(unsigned int total_size, struct xt_table *table,
void __user *pos;
unsigned int size;
int ret = 0;
- const void *loc_cpu_entry;
unsigned int i = 0;
struct ip6t_entry *iter;
@@ -1933,14 +1906,9 @@ compat_copy_entries_to_user(unsigned int total_size, struct xt_table *table,
if (IS_ERR(counters))
return PTR_ERR(counters);
- /* choose the copy that is on our node/cpu, ...
- * This choice is lazy (because current thread is
- * allowed to migrate to another cpu)
- */
- loc_cpu_entry = private->entries[raw_smp_processor_id()];
pos = userptr;
size = total_size;
- xt_entry_foreach(iter, loc_cpu_entry, total_size) {
+ xt_entry_foreach(iter, private->entries, total_size) {
ret = compat_copy_entry_to_user(iter, &pos,
&size, counters, i++);
if (ret != 0)
@@ -2115,8 +2083,7 @@ struct xt_table *ip6t_register_table(struct net *net,
goto out;
}
- /* choose the copy on our node/cpu, but dont care about preemption */
- loc_cpu_entry = newinfo->entries[raw_smp_processor_id()];
+ loc_cpu_entry = newinfo->entries;
memcpy(loc_cpu_entry, repl->entries, repl->size);
ret = translate_table(net, newinfo, loc_cpu_entry, repl);
@@ -2146,7 +2113,7 @@ void ip6t_unregister_table(struct net *net, struct xt_table *table)
private = xt_unregister_table(table);
/* Decrease module usage counts and free resources */
- loc_cpu_entry = private->entries[raw_smp_processor_id()];
+ loc_cpu_entry = private->entries;
xt_entry_foreach(iter, loc_cpu_entry, private->size)
cleanup_entry(iter, net);
if (private->number > private->initial_entries)
generated by cgit (git 2.34.1) at 2024-06-09 21:20:39 +0000