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-rw-r--r--net/ipv4/netfilter/arp_tables.c175
-rw-r--r--net/ipv4/netfilter/ip_tables.c199
-rw-r--r--net/ipv6/netfilter/ip6_tables.c190
3 files changed, 382 insertions, 182 deletions
diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c
index 3c2e9639bba..bba15630469 100644
--- a/net/ipv4/netfilter/arp_tables.c
+++ b/net/ipv4/netfilter/arp_tables.c
@@ -68,19 +68,14 @@ struct arpt_table_info {
unsigned int initial_entries;
unsigned int hook_entry[NF_ARP_NUMHOOKS];
unsigned int underflow[NF_ARP_NUMHOOKS];
- char entries[0] __attribute__((aligned(SMP_CACHE_BYTES)));
+ void *entries[NR_CPUS];
};
static LIST_HEAD(arpt_target);
static LIST_HEAD(arpt_tables);
+#define SET_COUNTER(c,b,p) do { (c).bcnt = (b); (c).pcnt = (p); } while(0)
#define ADD_COUNTER(c,b,p) do { (c).bcnt += (b); (c).pcnt += (p); } while(0)
-#ifdef CONFIG_SMP
-#define TABLE_OFFSET(t,p) (SMP_ALIGN((t)->size)*(p))
-#else
-#define TABLE_OFFSET(t,p) 0
-#endif
-
static inline int arp_devaddr_compare(const struct arpt_devaddr_info *ap,
char *hdr_addr, int len)
{
@@ -269,9 +264,7 @@ unsigned int arpt_do_table(struct sk_buff **pskb,
outdev = out ? out->name : nulldevname;
read_lock_bh(&table->lock);
- table_base = (void *)table->private->entries
- + TABLE_OFFSET(table->private,
- smp_processor_id());
+ table_base = (void *)table->private->entries[smp_processor_id()];
e = get_entry(table_base, table->private->hook_entry[hook]);
back = get_entry(table_base, table->private->underflow[hook]);
@@ -462,7 +455,8 @@ static inline int unconditional(const struct arpt_arp *arp)
/* Figures out from what hook each rule can be called: returns 0 if
* there are loops. Puts hook bitmask in comefrom.
*/
-static int mark_source_chains(struct arpt_table_info *newinfo, unsigned int valid_hooks)
+static int mark_source_chains(struct arpt_table_info *newinfo,
+ unsigned int valid_hooks, void *entry0)
{
unsigned int hook;
@@ -472,7 +466,7 @@ static int mark_source_chains(struct arpt_table_info *newinfo, unsigned int vali
for (hook = 0; hook < NF_ARP_NUMHOOKS; hook++) {
unsigned int pos = newinfo->hook_entry[hook];
struct arpt_entry *e
- = (struct arpt_entry *)(newinfo->entries + pos);
+ = (struct arpt_entry *)(entry0 + pos);
if (!(valid_hooks & (1 << hook)))
continue;
@@ -514,13 +508,13 @@ static int mark_source_chains(struct arpt_table_info *newinfo, unsigned int vali
goto next;
e = (struct arpt_entry *)
- (newinfo->entries + pos);
+ (entry0 + pos);
} while (oldpos == pos + e->next_offset);
/* Move along one */
size = e->next_offset;
e = (struct arpt_entry *)
- (newinfo->entries + pos + size);
+ (entry0 + pos + size);
e->counters.pcnt = pos;
pos += size;
} else {
@@ -537,7 +531,7 @@ static int mark_source_chains(struct arpt_table_info *newinfo, unsigned int vali
newpos = pos + e->next_offset;
}
e = (struct arpt_entry *)
- (newinfo->entries + newpos);
+ (entry0 + newpos);
e->counters.pcnt = pos;
pos = newpos;
}
@@ -689,6 +683,7 @@ static inline int cleanup_entry(struct arpt_entry *e, unsigned int *i)
static int translate_table(const char *name,
unsigned int valid_hooks,
struct arpt_table_info *newinfo,
+ void *entry0,
unsigned int size,
unsigned int number,
const unsigned int *hook_entries,
@@ -710,11 +705,11 @@ static int translate_table(const char *name,
i = 0;
/* Walk through entries, checking offsets. */
- ret = ARPT_ENTRY_ITERATE(newinfo->entries, newinfo->size,
+ ret = ARPT_ENTRY_ITERATE(entry0, newinfo->size,
check_entry_size_and_hooks,
newinfo,
- newinfo->entries,
- newinfo->entries + size,
+ entry0,
+ entry0 + size,
hook_entries, underflows, &i);
duprintf("translate_table: ARPT_ENTRY_ITERATE gives %d\n", ret);
if (ret != 0)
@@ -743,29 +738,26 @@ static int translate_table(const char *name,
}
}
- if (!mark_source_chains(newinfo, valid_hooks)) {
+ if (!mark_source_chains(newinfo, valid_hooks, entry0)) {
duprintf("Looping hook\n");
return -ELOOP;
}
/* Finally, each sanity check must pass */
i = 0;
- ret = ARPT_ENTRY_ITERATE(newinfo->entries, newinfo->size,
+ ret = ARPT_ENTRY_ITERATE(entry0, newinfo->size,
check_entry, name, size, &i);
if (ret != 0) {
- ARPT_ENTRY_ITERATE(newinfo->entries, newinfo->size,
+ ARPT_ENTRY_ITERATE(entry0, newinfo->size,
cleanup_entry, &i);
return ret;
}
/* And one copy for every other CPU */
for_each_cpu(i) {
- if (i == 0)
- continue;
- memcpy(newinfo->entries + SMP_ALIGN(newinfo->size) * i,
- newinfo->entries,
- SMP_ALIGN(newinfo->size));
+ if (newinfo->entries[i] && newinfo->entries[i] != entry0)
+ memcpy(newinfo->entries[i], entry0, newinfo->size);
}
return ret;
@@ -807,15 +799,42 @@ static inline int add_entry_to_counter(const struct arpt_entry *e,
return 0;
}
+static inline int set_entry_to_counter(const struct arpt_entry *e,
+ struct arpt_counters total[],
+ unsigned int *i)
+{
+ SET_COUNTER(total[*i], e->counters.bcnt, e->counters.pcnt);
+
+ (*i)++;
+ return 0;
+}
+
static void get_counters(const struct arpt_table_info *t,
struct arpt_counters counters[])
{
unsigned int cpu;
unsigned int i;
+ unsigned int curcpu;
+
+ /* Instead of clearing (by a previous call to memset())
+ * the counters and using adds, we set the counters
+ * with data used by 'current' CPU
+ * We dont care about preemption here.
+ */
+ curcpu = raw_smp_processor_id();
+
+ i = 0;
+ ARPT_ENTRY_ITERATE(t->entries[curcpu],
+ t->size,
+ set_entry_to_counter,
+ counters,
+ &i);
for_each_cpu(cpu) {
+ if (cpu == curcpu)
+ continue;
i = 0;
- ARPT_ENTRY_ITERATE(t->entries + TABLE_OFFSET(t, cpu),
+ ARPT_ENTRY_ITERATE(t->entries[cpu],
t->size,
add_entry_to_counter,
counters,
@@ -831,6 +850,7 @@ static int copy_entries_to_user(unsigned int total_size,
struct arpt_entry *e;
struct arpt_counters *counters;
int ret = 0;
+ void *loc_cpu_entry;
/* We need atomic snapshot of counters: rest doesn't change
* (other than comefrom, which userspace doesn't care
@@ -843,13 +863,13 @@ static int copy_entries_to_user(unsigned int total_size,
return -ENOMEM;
/* First, sum counters... */
- memset(counters, 0, countersize);
write_lock_bh(&table->lock);
get_counters(table->private, counters);
write_unlock_bh(&table->lock);
- /* ... then copy entire thing from CPU 0... */
- if (copy_to_user(userptr, table->private->entries, total_size) != 0) {
+ loc_cpu_entry = table->private->entries[raw_smp_processor_id()];
+ /* ... then copy entire thing ... */
+ if (copy_to_user(userptr, loc_cpu_entry, total_size) != 0) {
ret = -EFAULT;
goto free_counters;
}
@@ -859,7 +879,7 @@ static int copy_entries_to_user(unsigned int total_size,
for (off = 0, num = 0; off < total_size; off += e->next_offset, num++){
struct arpt_entry_target *t;
- e = (struct arpt_entry *)(table->private->entries + off);
+ e = (struct arpt_entry *)(loc_cpu_entry + off);
if (copy_to_user(userptr + off
+ offsetof(struct arpt_entry, counters),
&counters[num],
@@ -911,6 +931,47 @@ static int get_entries(const struct arpt_get_entries *entries,
return ret;
}
+static void free_table_info(struct arpt_table_info *info)
+{
+ int cpu;
+ for_each_cpu(cpu) {
+ if (info->size <= PAGE_SIZE)
+ kfree(info->entries[cpu]);
+ else
+ vfree(info->entries[cpu]);
+ }
+ kfree(info);
+}
+
+static struct arpt_table_info *alloc_table_info(unsigned int size)
+{
+ struct arpt_table_info *newinfo;
+ int cpu;
+
+ newinfo = kzalloc(sizeof(struct arpt_table_info), GFP_KERNEL);
+ if (!newinfo)
+ return NULL;
+
+ newinfo->size = size;
+
+ for_each_cpu(cpu) {
+ if (size <= PAGE_SIZE)
+ newinfo->entries[cpu] = kmalloc_node(size,
+ GFP_KERNEL,
+ cpu_to_node(cpu));
+ else
+ newinfo->entries[cpu] = vmalloc_node(size,
+ cpu_to_node(cpu));
+
+ if (newinfo->entries[cpu] == NULL) {
+ free_table_info(newinfo);
+ return NULL;
+ }
+ }
+
+ return newinfo;
+}
+
static int do_replace(void __user *user, unsigned int len)
{
int ret;
@@ -918,6 +979,7 @@ static int do_replace(void __user *user, unsigned int len)
struct arpt_table *t;
struct arpt_table_info *newinfo, *oldinfo;
struct arpt_counters *counters;
+ void *loc_cpu_entry, *loc_cpu_old_entry;
if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
return -EFAULT;
@@ -930,13 +992,13 @@ static int do_replace(void __user *user, unsigned int len)
if ((SMP_ALIGN(tmp.size) >> PAGE_SHIFT) + 2 > num_physpages)
return -ENOMEM;
- newinfo = vmalloc(sizeof(struct arpt_table_info)
- + SMP_ALIGN(tmp.size) *
- (highest_possible_processor_id()+1));
+ newinfo = alloc_table_info(tmp.size);
if (!newinfo)
return -ENOMEM;
- if (copy_from_user(newinfo->entries, user + sizeof(tmp),
+ /* choose the copy that is on our node/cpu */
+ loc_cpu_entry = newinfo->entries[raw_smp_processor_id()];
+ if (copy_from_user(loc_cpu_entry, user + sizeof(tmp),
tmp.size) != 0) {
ret = -EFAULT;
goto free_newinfo;
@@ -947,10 +1009,9 @@ static int do_replace(void __user *user, unsigned int len)
ret = -ENOMEM;
goto free_newinfo;
}
- memset(counters, 0, tmp.num_counters * sizeof(struct arpt_counters));
ret = translate_table(tmp.name, tmp.valid_hooks,
- newinfo, tmp.size, tmp.num_entries,
+ newinfo, loc_cpu_entry, tmp.size, tmp.num_entries,
tmp.hook_entry, tmp.underflow);
if (ret != 0)
goto free_newinfo_counters;
@@ -989,8 +1050,10 @@ static int do_replace(void __user *user, unsigned int len)
/* Get the old counters. */
get_counters(oldinfo, counters);
/* Decrease module usage counts and free resource */
- ARPT_ENTRY_ITERATE(oldinfo->entries, oldinfo->size, cleanup_entry,NULL);
- vfree(oldinfo);
+ loc_cpu_old_entry = oldinfo->entries[raw_smp_processor_id()];
+ ARPT_ENTRY_ITERATE(loc_cpu_old_entry, oldinfo->size, cleanup_entry,NULL);
+
+ free_table_info(oldinfo);
if (copy_to_user(tmp.counters, counters,
sizeof(struct arpt_counters) * tmp.num_counters) != 0)
ret = -EFAULT;
@@ -1002,11 +1065,11 @@ static int do_replace(void __user *user, unsigned int len)
module_put(t->me);
up(&arpt_mutex);
free_newinfo_counters_untrans:
- ARPT_ENTRY_ITERATE(newinfo->entries, newinfo->size, cleanup_entry, NULL);
+ ARPT_ENTRY_ITERATE(loc_cpu_entry, newinfo->size, cleanup_entry, NULL);
free_newinfo_counters:
vfree(counters);
free_newinfo:
- vfree(newinfo);
+ free_table_info(newinfo);
return ret;
}
@@ -1030,6 +1093,7 @@ static int do_add_counters(void __user *user, unsigned int len)
struct arpt_counters_info tmp, *paddc;
struct arpt_table *t;
int ret = 0;
+ void *loc_cpu_entry;
if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
return -EFAULT;
@@ -1059,7 +1123,9 @@ static int do_add_counters(void __user *user, unsigned int len)
}
i = 0;
- ARPT_ENTRY_ITERATE(t->private->entries,
+ /* Choose the copy that is on our node */
+ loc_cpu_entry = t->private->entries[smp_processor_id()];
+ ARPT_ENTRY_ITERATE(loc_cpu_entry,
t->private->size,
add_counter_to_entry,
paddc->counters,
@@ -1220,30 +1286,32 @@ int arpt_register_table(struct arpt_table *table,
struct arpt_table_info *newinfo;
static struct arpt_table_info bootstrap
= { 0, 0, 0, { 0 }, { 0 }, { } };
+ void *loc_cpu_entry;
- newinfo = vmalloc(sizeof(struct arpt_table_info)
- + SMP_ALIGN(repl->size) *
- (highest_possible_processor_id()+1));
+ newinfo = alloc_table_info(repl->size);
if (!newinfo) {
ret = -ENOMEM;
return ret;
}
- memcpy(newinfo->entries, repl->entries, repl->size);
+
+ /* choose the copy on our node/cpu */
+ loc_cpu_entry = newinfo->entries[raw_smp_processor_id()];
+ memcpy(loc_cpu_entry, repl->entries, repl->size);
ret = translate_table(table->name, table->valid_hooks,
- newinfo, repl->size,
+ newinfo, loc_cpu_entry, repl->size,
repl->num_entries,
repl->hook_entry,
repl->underflow);
duprintf("arpt_register_table: translate table gives %d\n", ret);
if (ret != 0) {
- vfree(newinfo);
+ free_table_info(newinfo);
return ret;
}
ret = down_interruptible(&arpt_mutex);
if (ret != 0) {
- vfree(newinfo);
+ free_table_info(newinfo);
return ret;
}
@@ -1272,20 +1340,23 @@ int arpt_register_table(struct arpt_table *table,
return ret;
free_unlock:
- vfree(newinfo);
+ free_table_info(newinfo);
goto unlock;
}
void arpt_unregister_table(struct arpt_table *table)
{
+ void *loc_cpu_entry;
+
down(&arpt_mutex);
LIST_DELETE(&arpt_tables, table);
up(&arpt_mutex);
/* Decrease module usage counts and free resources */
- ARPT_ENTRY_ITERATE(table->private->entries, table->private->size,
+ loc_cpu_entry = table->private->entries[raw_smp_processor_id()];
+ ARPT_ENTRY_ITERATE(loc_cpu_entry, table->private->size,
cleanup_entry, NULL);
- vfree(table->private);
+ free_table_info(table->private);
}
/* The built-in targets: standard (NULL) and error. */
diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index 45886c8475e..2a26d167e14 100644
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -83,11 +83,6 @@ static DECLARE_MUTEX(ipt_mutex);
context stops packets coming through and allows user context to read
the counters or update the rules.
- To be cache friendly on SMP, we arrange them like so:
- [ n-entries ]
- ... cache-align padding ...
- [ n-entries ]
-
Hence the start of any table is given by get_table() below. */
/* The table itself */
@@ -105,20 +100,15 @@ struct ipt_table_info
unsigned int underflow[NF_IP_NUMHOOKS];
/* ipt_entry tables: one per CPU */
- char entries[0] ____cacheline_aligned;
+ void *entries[NR_CPUS];
};
static LIST_HEAD(ipt_target);
static LIST_HEAD(ipt_match);
static LIST_HEAD(ipt_tables);
+#define SET_COUNTER(c,b,p) do { (c).bcnt = (b); (c).pcnt = (p); } while(0)
#define ADD_COUNTER(c,b,p) do { (c).bcnt += (b); (c).pcnt += (p); } while(0)
-#ifdef CONFIG_SMP
-#define TABLE_OFFSET(t,p) (SMP_ALIGN((t)->size)*(p))
-#else
-#define TABLE_OFFSET(t,p) 0
-#endif
-
#if 0
#define down(x) do { printk("DOWN:%u:" #x "\n", __LINE__); down(x); } while(0)
#define down_interruptible(x) ({ int __r; printk("DOWNi:%u:" #x "\n", __LINE__); __r = down_interruptible(x); if (__r != 0) printk("ABORT-DOWNi:%u\n", __LINE__); __r; })
@@ -290,8 +280,7 @@ ipt_do_table(struct sk_buff **pskb,
read_lock_bh(&table->lock);
IP_NF_ASSERT(table->valid_hooks & (1 << hook));
- table_base = (void *)table->private->entries
- + TABLE_OFFSET(table->private, smp_processor_id());
+ table_base = (void *)table->private->entries[smp_processor_id()];
e = get_entry(table_base, table->private->hook_entry[hook]);
#ifdef CONFIG_NETFILTER_DEBUG
@@ -563,7 +552,8 @@ unconditional(const struct ipt_ip *ip)
/* Figures out from what hook each rule can be called: returns 0 if
there are loops. Puts hook bitmask in comefrom. */
static int
-mark_source_chains(struct ipt_table_info *newinfo, unsigned int valid_hooks)
+mark_source_chains(struct ipt_table_info *newinfo,
+ unsigned int valid_hooks, void *entry0)
{
unsigned int hook;
@@ -572,7 +562,7 @@ mark_source_chains(struct ipt_table_info *newinfo, unsigned int valid_hooks)
for (hook = 0; hook < NF_IP_NUMHOOKS; hook++) {
unsigned int pos = newinfo->hook_entry[hook];
struct ipt_entry *e
- = (struct ipt_entry *)(newinfo->entries + pos);
+ = (struct ipt_entry *)(entry0 + pos);
if (!(valid_hooks & (1 << hook)))
continue;
@@ -622,13 +612,13 @@ mark_source_chains(struct ipt_table_info *newinfo, unsigned int valid_hooks)
goto next;
e = (struct ipt_entry *)
- (newinfo->entries + pos);
+ (entry0 + pos);
} while (oldpos == pos + e->next_offset);
/* Move along one */
size = e->next_offset;
e = (struct ipt_entry *)
- (newinfo->entries + pos + size);
+ (entry0 + pos + size);
e->counters.pcnt = pos;
pos += size;
} else {
@@ -645,7 +635,7 @@ mark_source_chains(struct ipt_table_info *newinfo, unsigned int valid_hooks)
newpos = pos + e->next_offset;
}
e = (struct ipt_entry *)
- (newinfo->entries + newpos);
+ (entry0 + newpos);
e->counters.pcnt = pos;
pos = newpos;
}
@@ -855,6 +845,7 @@ static int
translate_table(const char *name,
unsigned int valid_hooks,
struct ipt_table_info *newinfo,
+ void *entry0,
unsigned int size,
unsigned int number,
const unsigned int *hook_entries,
@@ -875,11 +866,11 @@ translate_table(const char *name,
duprintf("translate_table: size %u\n", newinfo->size);
i = 0;
/* Walk through entries, checking offsets. */
- ret = IPT_ENTRY_ITERATE(newinfo->entries, newinfo->size,
+ ret = IPT_ENTRY_ITERATE(entry0, newinfo->size,
check_entry_size_and_hooks,
newinfo,
- newinfo->entries,
- newinfo->entries + size,
+ entry0,
+ entry0 + size,
hook_entries, underflows, &i);
if (ret != 0)
return ret;
@@ -907,27 +898,24 @@ translate_table(const char *name,
}
}
- if (!mark_source_chains(newinfo, valid_hooks))
+ if (!mark_source_chains(newinfo, valid_hooks, entry0))
return -ELOOP;
/* Finally, each sanity check must pass */
i = 0;
- ret = IPT_ENTRY_ITERATE(newinfo->entries, newinfo->size,
+ ret = IPT_ENTRY_ITERATE(entry0, newinfo->size,
check_entry, name, size, &i);
if (ret != 0) {
- IPT_ENTRY_ITERATE(newinfo->entries, newinfo->size,
+ IPT_ENTRY_ITERATE(entry0, newinfo->size,
cleanup_entry, &i);
return ret;
}
/* And one copy for every other CPU */
for_each_cpu(i) {
- if (i == 0)
- continue;
- memcpy(newinfo->entries + SMP_ALIGN(newinfo->size) * i,
- newinfo->entries,
- SMP_ALIGN(newinfo->size));
+ if (newinfo->entries[i] && newinfo->entries[i] != entry0)
+ memcpy(newinfo->entries[i], entry0, newinfo->size);
}
return ret;
@@ -943,15 +931,12 @@ replace_table(struct ipt_table *table,
#ifdef CONFIG_NETFILTER_DEBUG
{
- struct ipt_entry *table_base;
- unsigned int i;
+ int cpu;
- for_each_cpu(i) {
- table_base =
- (void *)newinfo->entries
- + TABLE_OFFSET(newinfo, i);
-
- table_base->comefrom = 0xdead57ac;
+ for_each_cpu(cpu) {
+ struct ipt_entry *table_base = newinfo->entries[cpu];
+ if (table_base)
+ table_base->comefrom = 0xdead57ac;
}
}
#endif
@@ -986,16 +971,44 @@ add_entry_to_counter(const struct ipt_entry *e,
return 0;
}
+static inline int
+set_entry_to_counter(const struct ipt_entry *e,
+ struct ipt_counters total[],
+ unsigned int *i)
+{
+ SET_COUNTER(total[*i], e->counters.bcnt, e->counters.pcnt);
+
+ (*i)++;
+ return 0;
+}
+
static void
get_counters(const struct ipt_table_info *t,
struct ipt_counters counters[])
{
unsigned int cpu;
unsigned int i;
+ unsigned int curcpu;
+
+ /* Instead of clearing (by a previous call to memset())
+ * the counters and using adds, we set the counters
+ * with data used by 'current' CPU
+ * We dont care about preemption here.
+ */
+ curcpu = raw_smp_processor_id();
+
+ i = 0;
+ IPT_ENTRY_ITERATE(t->entries[curcpu],
+ t->size,
+ set_entry_to_counter,
+ counters,
+ &i);
for_each_cpu(cpu) {
+ if (cpu == curcpu)
+ continue;
i = 0;
- IPT_ENTRY_ITERATE(t->entries + TABLE_OFFSET(t, cpu),
+ IPT_ENTRY_ITERATE(t->entries[cpu],
t->size,
add_entry_to_counter,
counters,
@@ -1012,24 +1025,29 @@ copy_entries_to_user(unsigned int total_size,
struct ipt_entry *e;
struct ipt_counters *counters;
int ret = 0;
+ void *loc_cpu_entry;
/* We need atomic snapshot of counters: rest doesn't change
(other than comefrom, which userspace doesn't care
about). */
countersize = sizeof(struct ipt_counters) * table->private->number;
- counters = vmalloc(countersize);
+ counters = vmalloc_node(countersize, numa_node_id());
if (counters == NULL)
return -ENOMEM;
/* First, sum counters... */
- memset(counters, 0, countersize);
write_lock_bh(&table->lock);
get_counters(table->private, counters);
write_unlock_bh(&table->lock);
- /* ... then copy entire thing from CPU 0... */
- if (copy_to_user(userptr, table->private->entries, total_size) != 0) {
+ /* 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 = table->private->entries[raw_smp_processor_id()];
+ /* ... then copy entire thing ... */
+ if (copy_to_user(userptr, loc_cpu_entry, total_size) != 0) {
ret = -EFAULT;
goto free_counters;
}
@@ -1041,7 +1059,7 @@ copy_entries_to_user(unsigned int total_size,
struct ipt_entry_match *m;
struct ipt_entry_target *t;
- e = (struct ipt_entry *)(table->private->entries + off);
+ e = (struct ipt_entry *)(loc_cpu_entry + off);
if (copy_to_user(userptr + off
+ offsetof(struct ipt_entry, counters),
&counters[num],
@@ -1110,6 +1128,45 @@ get_entries(const struct ipt_get_entries *entries,
return ret;
}
+static void free_table_info(struct ipt_table_info *info)
+{
+ int cpu;
+ for_each_cpu(cpu) {
+ if (info->size <= PAGE_SIZE)
+ kfree(info->entries[cpu]);
+ else
+ vfree(info->entries[cpu]);
+ }
+ kfree(info);
+}
+
+static struct ipt_table_info *alloc_table_info(unsigned int size)
+{
+ struct ipt_table_info *newinfo;
+ int cpu;
+
+ newinfo = kzalloc(sizeof(struct ipt_table_info), GFP_KERNEL);
+ if (!newinfo)
+ return NULL;
+
+ newinfo->size = size;
+
+ for_each_cpu(cpu) {
+ if (size <= PAGE_SIZE)
+ newinfo->entries[cpu] = kmalloc_node(size,
+ GFP_KERNEL,
+ cpu_to_node(cpu));
+ else
+ newinfo->entries[cpu] = vmalloc_node(size, cpu_to_node(cpu));
+ if (newinfo->entries[cpu] == 0) {
+ free_table_info(newinfo);
+ return NULL;
+ }
+ }
+
+ return newinfo;
+}
+
static int
do_replace(void __user *user, unsigned int len)
{
@@ -1118,6 +1175,7 @@ do_replace(void __user *user, unsigned int len)
struct ipt_table *t;
struct ipt_table_info *newinfo, *oldinfo;
struct ipt_counters *counters;
+ void *loc_cpu_entry, *loc_cpu_old_entry;
if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
return -EFAULT;
@@ -1130,13 +1188,13 @@ do_replace(void __user *user, unsigned int len)
if ((SMP_ALIGN(tmp.size) >> PAGE_SHIFT) + 2 > num_physpages)
return -ENOMEM;
- newinfo = vmalloc(sizeof(struct ipt_table_info)
- + SMP_ALIGN(tmp.size) *
- (highest_possible_processor_id()+1));
+ newinfo = alloc_table_info(tmp.size);
if (!newinfo)
return -ENOMEM;
- if (copy_from_user(newinfo->entries, user + sizeof(tmp),
+ /* choose the copy that is our node/cpu */
+ loc_cpu_entry = newinfo->entries[raw_smp_processor_id()];
+ if (copy_from_user(loc_cpu_entry, user + sizeof(tmp),
tmp.size) != 0) {
ret = -EFAULT;
goto free_newinfo;
@@ -1147,10 +1205,9 @@ do_replace(void __user *user, unsigned int len)
ret = -ENOMEM;
goto free_newinfo;
}
- memset(counters, 0, tmp.num_counters * sizeof(struct ipt_counters));
ret = translate_table(tmp.name, tmp.valid_hooks,
- newinfo, tmp.size, tmp.num_entries,
+ newinfo, loc_cpu_entry, tmp.size, tmp.num_entries,
tmp.hook_entry, tmp.underflow);
if (ret != 0)
goto free_newinfo_counters;
@@ -1189,8 +1246,9 @@ do_replace(void __user *user, unsigned int len)
/* Get the old counters. */
get_counters(oldinfo, counters);
/* Decrease module usage counts and free resource */
- IPT_ENTRY_ITERATE(oldinfo->entries, oldinfo->size, cleanup_entry,NULL);
- vfree(oldinfo);
+ loc_cpu_old_entry = oldinfo->entries[raw_smp_processor_id()];
+ IPT_ENTRY_ITERATE(loc_cpu_old_entry, oldinfo->size, cleanup_entry,NULL);
+ free_table_info(oldinfo);
if (copy_to_user(tmp.counters, counters,
sizeof(struct ipt_counters) * tmp.num_counters) != 0)
ret = -EFAULT;
@@ -1202,11 +1260,11 @@ do_replace(void __user *user, unsigned int len)
module_put(t->me);
up(&ipt_mutex);
free_newinfo_counters_untrans:
- IPT_ENTRY_ITERATE(newinfo->entries, newinfo->size, cleanup_entry,NULL);
+ IPT_ENTRY_ITERATE(loc_cpu_entry, newinfo->size, cleanup_entry,NULL);
free_newinfo_counters:
vfree(counters);
free_newinfo:
- vfree(newinfo);
+ free_table_info(newinfo);
return ret;
}
@@ -1239,6 +1297,7 @@ do_add_counters(void __user *user, unsigned int len)
struct ipt_counters_info tmp, *paddc;
struct ipt_table *t;
int ret = 0;
+ void *loc_cpu_entry;
if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
return -EFAULT;
@@ -1246,7 +1305,7 @@ do_add_counters(void __user *user, unsigned int len)
if (len != sizeof(tmp) + tmp.num_counters*sizeof(struct ipt_counters))
return -EINVAL;
- paddc = vmalloc(len);
+ paddc = vmalloc_node(len, numa_node_id());
if (!paddc)
return -ENOMEM;
@@ -1268,7 +1327,9 @@ do_add_counters(void __user *user, unsigned int len)
}
i = 0;
- IPT_ENTRY_ITERATE(t->private->entries,
+ /* Choose the copy that is on our node */
+ loc_cpu_entry = t->private->entries[raw_smp_processor_id()];
+ IPT_ENTRY_ITERATE(loc_cpu_entry,
t->private->size,
add_counter_to_entry,
paddc->counters,
@@ -1460,28 +1521,31 @@ int ipt_register_table(struct ipt_table *table, const struct ipt_replace *repl)
struct ipt_table_info *newinfo;
static struct ipt_table_info bootstrap
= { 0, 0, 0, { 0 }, { 0 }, { } };
+ void *loc_cpu_entry;
- newinfo = vmalloc(sizeof(struct ipt_table_info)
- + SMP_ALIGN(repl->size) *
- (highest_possible_processor_id()+1));
+ newinfo = alloc_table_info(repl->size);
if (!newinfo)
return -ENOMEM;
- memcpy(newinfo->entries, repl->entries, repl->size);
+ /* choose the copy on our node/cpu
+ * but dont care of preemption
+ */
+ loc_cpu_entry = newinfo->entries[raw_smp_processor_id()];
+ memcpy(loc_cpu_entry, repl->entries, repl->size);
ret = translate_table(table->name, table->valid_hooks,
- newinfo, repl->size,
+ newinfo, loc_cpu_entry, repl->size,
repl->num_entries,
repl->hook_entry,
repl->underflow);
if (ret != 0) {
- vfree(newinfo);
+ free_table_info(newinfo);
return ret;
}
ret = down_interruptible(&ipt_mutex);
if (ret != 0) {
- vfree(newinfo);
+ free_table_info(newinfo);
return ret;
}
@@ -1510,20 +1574,23 @@ int ipt_register_table(struct ipt_table *table, const struct ipt_replace *repl)
return ret;
free_unlock:
- vfree(newinfo);
+ free_table_info(newinfo);
goto unlock;
}
void ipt_unregister_table(struct ipt_table *table)
{
+ void *loc_cpu_entry;
+
down(&ipt_mutex);
LIST_DELETE(&ipt_tables, table);
up(&ipt_mutex);
/* Decrease module usage counts and free resources */
- IPT_ENTRY_ITERATE(table->private->entries, table->private->size,
+ loc_cpu_entry = table->private->entries[raw_smp_processor_id()];
+ IPT_ENTRY_ITERATE(loc_cpu_entry, table->private->size,
cleanup_entry, NULL);
- vfree(table->private);
+ free_table_info(table->private);
}
/* Returns 1 if the port is matched by the range, 0 otherwise */
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index 95d469271c4..dd80020d874 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -86,11 +86,6 @@ static DECLARE_MUTEX(ip6t_mutex);
context stops packets coming through and allows user context to read
the counters or update the rules.
- To be cache friendly on SMP, we arrange them like so:
- [ n-entries ]
- ... cache-align padding ...
- [ n-entries ]
-
Hence the start of any table is given by get_table() below. */
/* The table itself */
@@ -108,20 +103,15 @@ struct ip6t_table_info
unsigned int underflow[NF_IP6_NUMHOOKS];
/* ip6t_entry tables: one per CPU */
- char entries[0] ____cacheline_aligned;
+ void *entries[NR_CPUS];
};
static LIST_HEAD(ip6t_target);
static LIST_HEAD(ip6t_match);
static LIST_HEAD(ip6t_tables);
+#define SET_COUNTER(c,b,p) do { (c).bcnt = (b); (c).pcnt = (p); } while(0)
#define ADD_COUNTER(c,b,p) do { (c).bcnt += (b); (c).pcnt += (p); } while(0)
-#ifdef CONFIG_SMP
-#define TABLE_OFFSET(t,p) (SMP_ALIGN((t)->size)*(p))
-#else
-#define TABLE_OFFSET(t,p) 0
-#endif
-
#if 0
#define down(x) do { printk("DOWN:%u:" #x "\n", __LINE__); down(x); } while(0)
#define down_interruptible(x) ({ int __r; printk("DOWNi:%u:" #x "\n", __LINE__); __r = down_interruptible(x); if (__r != 0) printk("ABORT-DOWNi:%u\n", __LINE__); __r; })
@@ -376,8 +366,7 @@ ip6t_do_table(struct sk_buff **pskb,
read_lock_bh(&table->lock);
IP_NF_ASSERT(table->valid_hooks & (1 << hook));
- table_base = (void *)table->private->entries
- + TABLE_OFFSET(table->private, smp_processor_id());
+ table_base = (void *)table->private->entries[smp_processor_id()];
e = get_entry(table_base, table->private->hook_entry[hook]);
#ifdef CONFIG_NETFILTER_DEBUG
@@ -649,7 +638,8 @@ unconditional(const struct ip6t_ip6 *ipv6)
/* Figures out from what hook each rule can be called: returns 0 if
there are loops. Puts hook bitmask in comefrom. */
static int
-mark_source_chains(struct ip6t_table_info *newinfo, unsigned int valid_hooks)
+mark_source_chains(struct ip6t_table_info *newinfo,
+ unsigned int valid_hooks, void *entry0)
{
unsigned int hook;
@@ -658,7 +648,7 @@ mark_source_chains(struct ip6t_table_info *newinfo, unsigned int valid_hooks)
for (hook = 0; hook < NF_IP6_NUMHOOKS; hook++) {
unsigned int pos = newinfo->hook_entry[hook];
struct ip6t_entry *e
- = (struct ip6t_entry *)(newinfo->entries + pos);
+ = (struct ip6t_entry *)(entry0 + pos);
if (!(valid_hooks & (1 << hook)))
continue;
@@ -708,13 +698,13 @@ mark_source_chains(struct ip6t_table_info *newinfo, unsigned int valid_hooks)
goto next;
e = (struct ip6t_entry *)
- (newinfo->entries + pos);
+ (entry0 + pos);
} while (oldpos == pos + e->next_offset);
/* Move along one */
size = e->next_offset;
e = (struct ip6t_entry *)
- (newinfo->entries + pos + size);
+ (entry0 + pos + size);
e->counters.pcnt = pos;
pos += size;
} else {
@@ -731,7 +721,7 @@ mark_source_chains(struct ip6t_table_info *newinfo, unsigned int valid_hooks)
newpos = pos + e->next_offset;
}
e = (struct ip6t_entry *)
- (newinfo->entries + newpos);
+ (entry0 + newpos);
e->counters.pcnt = pos;
pos = newpos;
}
@@ -941,6 +931,7 @@ static int
translate_table(const char *name,
unsigned int valid_hooks,
struct ip6t_table_info *newinfo,
+ void *entry0,
unsigned int size,
unsigned int number,
const unsigned int *hook_entries,
@@ -961,11 +952,11 @@ translate_table(const char *name,
duprintf("translate_table: size %u\n", newinfo->size);
i = 0;
/* Walk through entries, checking offsets. */
- ret = IP6T_ENTRY_ITERATE(newinfo->entries, newinfo->size,
+ ret = IP6T_ENTRY_ITERATE(entry0, newinfo->size,
check_entry_size_and_hooks,
newinfo,
- newinfo->entries,
- newinfo->entries + size,
+ entry0,
+ entry0 + size,
hook_entries, underflows, &i);
if (ret != 0)
return ret;
@@ -993,27 +984,24 @@ translate_table(const char *name,
}
}
- if (!mark_source_chains(newinfo, valid_hooks))
+ if (!mark_source_chains(newinfo, valid_hooks, entry0))
return -ELOOP;
/* Finally, each sanity check must pass */
i = 0;
- ret = IP6T_ENTRY_ITERATE(newinfo->entries, newinfo->size,
+ ret = IP6T_ENTRY_ITERATE(entry0, newinfo->size,
check_entry, name, size, &i);
if (ret != 0) {
- IP6T_ENTRY_ITERATE(newinfo->entries, newinfo->size,
+ IP6T_ENTRY_ITERATE(entry0, newinfo->size,
cleanup_entry, &i);
return ret;
}
/* And one copy for every other CPU */
for_each_cpu(i) {
- if (i == 0)
- continue;
- memcpy(newinfo->entries + SMP_ALIGN(newinfo->size) * i,
- newinfo->entries,
- SMP_ALIGN(newinfo->size));
+ if (newinfo->entries[i] && newinfo->entries[i] != entry0)
+ memcpy(newinfo->entries[i], entry0, newinfo->size);
}
return ret;
@@ -1029,15 +1017,12 @@ replace_table(struct ip6t_table *table,
#ifdef CONFIG_NETFILTER_DEBUG
{
- struct ip6t_entry *table_base;
- unsigned int i;
+ int cpu;
- for_each_cpu(i) {
- table_base =
- (void *)newinfo->entries
- + TABLE_OFFSET(newinfo, i);
-
- table_base->comefrom = 0xdead57ac;
+ for_each_cpu(cpu) {
+ struct ip6t_entry *table_base = newinfo->entries[cpu];
+ if (table_base)
+ table_base->comefrom = 0xdead57ac;
}
}
#endif
@@ -1072,16 +1057,44 @@ add_entry_to_counter(const struct ip6t_entry *e,
return 0;
}
+static inline int
+set_entry_to_counter(const struct ip6t_entry *e,
+ struct ip6t_counters total[],
+ unsigned int *i)
+{
+ SET_COUNTER(total[*i], e->counters.bcnt, e->counters.pcnt);
+
+ (*i)++;
+ return 0;
+}
+
static void
get_counters(const struct ip6t_table_info *t,
struct ip6t_counters counters[])
{
unsigned int cpu;
unsigned int i;
+ unsigned int curcpu;
+
+ /* Instead of clearing (by a previous call to memset())
+ * the counters and using adds, we set the counters
+ * with data used by 'current' CPU
+ * We dont care about preemption here.
+ */
+ curcpu = raw_smp_processor_id();
+
+ i = 0;
+ IP6T_ENTRY_ITERATE(t->entries[curcpu],
+ t->size,
+ set_entry_to_counter,
+ counters,
+ &i);
for_each_cpu(cpu) {
+ if (cpu == curcpu)
+ continue;
i = 0;
- IP6T_ENTRY_ITERATE(t->entries + TABLE_OFFSET(t, cpu),
+ IP6T_ENTRY_ITERATE(t->entries[cpu],
t->size,
add_entry_to_counter,
counters,
@@ -1098,6 +1111,7 @@ copy_entries_to_user(unsigned int total_size,
struct ip6t_entry *e;
struct ip6t_counters *counters;
int ret = 0;
+ void *loc_cpu_entry;
/* We need atomic snapshot of counters: rest doesn't change
(other than comefrom, which userspace doesn't care
@@ -1109,13 +1123,13 @@ copy_entries_to_user(unsigned int total_size,
return -ENOMEM;
/* First, sum counters... */
- memset(counters, 0, countersize);
write_lock_bh(&table->lock);
get_counters(table->private, counters);
write_unlock_bh(&table->lock);
- /* ... then copy entire thing from CPU 0... */
- if (copy_to_user(userptr, table->private->entries, total_size) != 0) {
+ /* choose the copy that is on ourc node/cpu */
+ loc_cpu_entry = table->private->entries[raw_smp_processor_id()];
+ if (copy_to_user(userptr, loc_cpu_entry, total_size) != 0) {
ret = -EFAULT;
goto free_counters;
}
@@ -1127,7 +1141,7 @@ copy_entries_to_user(unsigned int total_size,
struct ip6t_entry_match *m;
struct ip6t_entry_target *t;
- e = (struct ip6t_entry *)(table->private->entries + off);
+ e = (struct ip6t_entry *)(loc_cpu_entry + off);
if (copy_to_user(userptr + off
+ offsetof(struct ip6t_entry, counters),
&counters[num],
@@ -1196,6 +1210,46 @@ get_entries(const struct ip6t_get_entries *entries,
return ret;
}
+static void free_table_info(struct ip6t_table_info *info)
+{
+ int cpu;
+ for_each_cpu(cpu) {
+ if (info->size <= PAGE_SIZE)
+ kfree(info->entries[cpu]);
+ else
+ vfree(info->entries[cpu]);
+ }
+ kfree(info);
+}
+
+static struct ip6t_table_info *alloc_table_info(unsigned int size)
+{
+ struct ip6t_table_info *newinfo;
+ int cpu;
+
+ newinfo = kzalloc(sizeof(struct ip6t_table_info), GFP_KERNEL);
+ if (!newinfo)
+ return NULL;
+
+ newinfo->size = size;
+
+ for_each_cpu(cpu) {
+ if (size <= PAGE_SIZE)
+ newinfo->entries[cpu] = kmalloc_node(size,
+ GFP_KERNEL,
+ cpu_to_node(cpu));
+ else
+ newinfo->entries[cpu] = vmalloc_node(size,
+ cpu_to_node(cpu));
+ if (newinfo->entries[cpu] == NULL) {
+ free_table_info(newinfo);
+ return NULL;
+ }
+ }
+
+ return newinfo;
+}
+
static int
do_replace(void __user *user, unsigned int len)
{
@@ -1204,6 +1258,7 @@ do_replace(void __user *user, unsigned int len)
struct ip6t_table *t;
struct ip6t_table_info *newinfo, *oldinfo;
struct ip6t_counters *counters;
+ void *loc_cpu_entry, *loc_cpu_old_entry;
if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
return -EFAULT;
@@ -1212,13 +1267,13 @@ do_replace(void __user *user, unsigned int len)
if ((SMP_ALIGN(tmp.size) >> PAGE_SHIFT) + 2 > num_physpages)
return -ENOMEM;
- newinfo = vmalloc(sizeof(struct ip6t_table_info)
- + SMP_ALIGN(tmp.size) *
- (highest_possible_processor_id()+1));
+ newinfo = alloc_table_info(tmp.size);
if (!newinfo)
return -ENOMEM;
- if (copy_from_user(newinfo->entries, user + sizeof(tmp),
+ /* choose the copy that is on our node/cpu */
+ loc_cpu_entry = newinfo->entries[raw_smp_processor_id()];
+ if (copy_from_user(loc_cpu_entry, user + sizeof(tmp),
tmp.size) != 0) {
ret = -EFAULT;
goto free_newinfo;
@@ -1229,10 +1284,9 @@ do_replace(void __user *user, unsigned int len)
ret = -ENOMEM;
goto free_newinfo;
}
- memset(counters, 0, tmp.num_counters * sizeof(struct ip6t_counters));
ret = translate_table(tmp.name, tmp.valid_hooks,
- newinfo, tmp.size, tmp.num_entries,
+ newinfo, loc_cpu_entry, tmp.size, tmp.num_entries,
tmp.hook_entry, tmp.underflow);
if (ret != 0)
goto free_newinfo_counters;
@@ -1271,8 +1325,9 @@ do_replace(void __user *user, unsigned int len)
/* Get the old counters. */
get_counters(oldinfo, counters);
/* Decrease module usage counts and free resource */
- IP6T_ENTRY_ITERATE(oldinfo->entries, oldinfo->size, cleanup_entry,NULL);
- vfree(oldinfo);
+ loc_cpu_old_entry = oldinfo->entries[raw_smp_processor_id()];
+ IP6T_ENTRY_ITERATE(loc_cpu_old_entry, oldinfo->size, cleanup_entry,NULL);
+ free_table_info(oldinfo);
if (copy_to_user(tmp.counters, counters,
sizeof(struct ip6t_counters) * tmp.num_counters) != 0)
ret = -EFAULT;
@@ -1284,11 +1339,11 @@ do_replace(void __user *user, unsigned int len)
module_put(t->me);
up(&ip6t_mutex);
free_newinfo_counters_untrans:
- IP6T_ENTRY_ITERATE(newinfo->entries, newinfo->size, cleanup_entry,NULL);
+ IP6T_ENTRY_ITERATE(loc_cpu_entry, newinfo->size, cleanup_entry,NULL);
free_newinfo_counters:
vfree(counters);
free_newinfo:
- vfree(newinfo);
+ free_table_info(newinfo);
return ret;
}
@@ -1321,6 +1376,7 @@ do_add_counters(void __user *user, unsigned int len)
struct ip6t_counters_info tmp, *paddc;
struct ip6t_table *t;
int ret = 0;
+ void *loc_cpu_entry;
if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
return -EFAULT;
@@ -1350,7 +1406,9 @@ do_add_counters(void __user *user, unsigned int len)
}
i = 0;
- IP6T_ENTRY_ITERATE(t->private->entries,
+ /* Choose the copy that is on our node */
+ loc_cpu_entry = t->private->entries[smp_processor_id()];
+ IP6T_ENTRY_ITERATE(loc_cpu_entry,
t->private->size,
add_counter_to_entry,
paddc->counters,
@@ -1543,28 +1601,29 @@ int ip6t_register_table(struct ip6t_table *table,
struct ip6t_table_info *newinfo;
static struct ip6t_table_info bootstrap
= { 0, 0, 0, { 0 }, { 0 }, { } };
+ void *loc_cpu_entry;
- newinfo = vmalloc(sizeof(struct ip6t_table_info)
- + SMP_ALIGN(repl->size) *
- (highest_possible_processor_id()+1));
+ newinfo = alloc_table_info(repl->size);
if (!newinfo)
return -ENOMEM;
- memcpy(newinfo->entries, repl->entries, repl->size);
+ /* choose the copy on our node/cpu */
+ loc_cpu_entry = newinfo->entries[raw_smp_processor_id()];
+ memcpy(loc_cpu_entry, repl->entries, repl->size);
ret = translate_table(table->name, table->valid_hooks,
- newinfo, repl->size,
+ newinfo, loc_cpu_entry, repl->size,
repl->num_entries,
repl->hook_entry,
repl->underflow);
if (ret != 0) {
- vfree(newinfo);
+ free_table_info(newinfo);
return ret;
}
ret = down_interruptible(&ip6t_mutex);
if (ret != 0) {
- vfree(newinfo);
+ free_table_info(newinfo);
return ret;
}
@@ -1593,20 +1652,23 @@ int ip6t_register_table(struct ip6t_table *table,
return ret;
free_unlock:
- vfree(newinfo);
+ free_table_info(newinfo);
goto unlock;
}
void ip6t_unregister_table(struct ip6t_table *table)
{
+ void *loc_cpu_entry;
+
down(&ip6t_mutex);
LIST_DELETE(&ip6t_tables, table);
up(&ip6t_mutex);
/* Decrease module usage counts and free resources */
- IP6T_ENTRY_ITERATE(table->private->entries, table->private->size,
+ loc_cpu_entry = table->private->entries[raw_smp_processor_id()];
+ IP6T_ENTRY_ITERATE(loc_cpu_entry, table->private->size,
cleanup_entry, NULL);
- vfree(table->private);
+ free_table_info(table->private);
}
/* Returns 1 if the port is matched by the range, 0 otherwise */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 10:35:57 +0000