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-rw-r--r--net/netfilter/nft_set_pipapo.c41
-rw-r--r--net/netfilter/nft_set_pipapo.h14
-rw-r--r--net/netfilter/nft_set_pipapo_avx2.c15
3 files changed, 44 insertions, 26 deletions
diff --git a/net/netfilter/nft_set_pipapo.c b/net/netfilter/nft_set_pipapo.c
index b17c18203416..54d0bac140a3 100644
--- a/net/netfilter/nft_set_pipapo.c
+++ b/net/netfilter/nft_set_pipapo.c
@@ -342,9 +342,6 @@
#include "nft_set_pipapo_avx2.h"
#include "nft_set_pipapo.h"
-/* Current working bitmap index, toggled between field matches */
-static DEFINE_PER_CPU(bool, nft_pipapo_scratch_index);
-
/**
* pipapo_refill() - For each set bit, set bits from selected mapping table item
* @map: Bitmap to be scanned for set bits
@@ -412,6 +409,7 @@ bool nft_pipapo_lookup(const struct net *net, const struct nft_set *set,
const u32 *key, const struct nft_set_ext **ext)
{
struct nft_pipapo *priv = nft_set_priv(set);
+ struct nft_pipapo_scratch *scratch;
unsigned long *res_map, *fill_map;
u8 genmask = nft_genmask_cur(net);
const u8 *rp = (const u8 *)key;
@@ -422,15 +420,17 @@ bool nft_pipapo_lookup(const struct net *net, const struct nft_set *set,
local_bh_disable();
- map_index = raw_cpu_read(nft_pipapo_scratch_index);
-
m = rcu_dereference(priv->match);
if (unlikely(!m || !*raw_cpu_ptr(m->scratch)))
goto out;
- res_map = *raw_cpu_ptr(m->scratch) + (map_index ? m->bsize_max : 0);
- fill_map = *raw_cpu_ptr(m->scratch) + (map_index ? 0 : m->bsize_max);
+ scratch = *raw_cpu_ptr(m->scratch);
+
+ map_index = scratch->map_index;
+
+ res_map = scratch->map + (map_index ? m->bsize_max : 0);
+ fill_map = scratch->map + (map_index ? 0 : m->bsize_max);
memset(res_map, 0xff, m->bsize_max * sizeof(*res_map));
@@ -460,7 +460,7 @@ next_match:
b = pipapo_refill(res_map, f->bsize, f->rules, fill_map, f->mt,
last);
if (b < 0) {
- raw_cpu_write(nft_pipapo_scratch_index, map_index);
+ scratch->map_index = map_index;
local_bh_enable();
return false;
@@ -477,7 +477,7 @@ next_match:
* current inactive bitmap is clean and can be reused as
* *next* bitmap (not initial) for the next packet.
*/
- raw_cpu_write(nft_pipapo_scratch_index, map_index);
+ scratch->map_index = map_index;
local_bh_enable();
return true;
@@ -1123,12 +1123,12 @@ static int pipapo_realloc_scratch(struct nft_pipapo_match *clone,
int i;
for_each_possible_cpu(i) {
- unsigned long *scratch;
+ struct nft_pipapo_scratch *scratch;
#ifdef NFT_PIPAPO_ALIGN
- unsigned long *scratch_aligned;
+ void *scratch_aligned;
#endif
-
- scratch = kzalloc_node(bsize_max * sizeof(*scratch) * 2 +
+ scratch = kzalloc_node(struct_size(scratch, map,
+ bsize_max * 2) +
NFT_PIPAPO_ALIGN_HEADROOM,
GFP_KERNEL, cpu_to_node(i));
if (!scratch) {
@@ -1147,7 +1147,16 @@ static int pipapo_realloc_scratch(struct nft_pipapo_match *clone,
*per_cpu_ptr(clone->scratch, i) = scratch;
#ifdef NFT_PIPAPO_ALIGN
- scratch_aligned = NFT_PIPAPO_LT_ALIGN(scratch);
+ /* Align &scratch->map (not the struct itself): the extra
+ * %NFT_PIPAPO_ALIGN_HEADROOM bytes passed to kzalloc_node()
+ * above guarantee we can waste up to those bytes in order
+ * to align the map field regardless of its offset within
+ * the struct.
+ */
+ BUILD_BUG_ON(offsetof(struct nft_pipapo_scratch, map) > NFT_PIPAPO_ALIGN_HEADROOM);
+
+ scratch_aligned = NFT_PIPAPO_LT_ALIGN(&scratch->map);
+ scratch_aligned -= offsetof(struct nft_pipapo_scratch, map);
*per_cpu_ptr(clone->scratch_aligned, i) = scratch_aligned;
#endif
}
@@ -2136,7 +2145,7 @@ static int nft_pipapo_init(const struct nft_set *set,
m->field_count = field_count;
m->bsize_max = 0;
- m->scratch = alloc_percpu(unsigned long *);
+ m->scratch = alloc_percpu(struct nft_pipapo_scratch *);
if (!m->scratch) {
err = -ENOMEM;
goto out_scratch;
@@ -2145,7 +2154,7 @@ static int nft_pipapo_init(const struct nft_set *set,
*per_cpu_ptr(m->scratch, i) = NULL;
#ifdef NFT_PIPAPO_ALIGN
- m->scratch_aligned = alloc_percpu(unsigned long *);
+ m->scratch_aligned = alloc_percpu(struct nft_pipapo_scratch *);
if (!m->scratch_aligned) {
err = -ENOMEM;
goto out_free;
diff --git a/net/netfilter/nft_set_pipapo.h b/net/netfilter/nft_set_pipapo.h
index 1040223da5fa..d3bc1551694f 100644
--- a/net/netfilter/nft_set_pipapo.h
+++ b/net/netfilter/nft_set_pipapo.h
@@ -131,6 +131,16 @@ struct nft_pipapo_field {
};
/**
+ * struct nft_pipapo_scratch - percpu data used for lookup and matching
+ * @map_index: Current working bitmap index, toggled between field matches
+ * @map: store partial matching results during lookup
+ */
+struct nft_pipapo_scratch {
+ u8 map_index;
+ unsigned long map[];
+};
+
+/**
* struct nft_pipapo_match - Data used for lookup and matching
* @field_count Amount of fields in set
* @scratch: Preallocated per-CPU maps for partial matching results
@@ -142,9 +152,9 @@ struct nft_pipapo_field {
struct nft_pipapo_match {
int field_count;
#ifdef NFT_PIPAPO_ALIGN
- unsigned long * __percpu *scratch_aligned;
+ struct nft_pipapo_scratch * __percpu *scratch_aligned;
#endif
- unsigned long * __percpu *scratch;
+ struct nft_pipapo_scratch * __percpu *scratch;
size_t bsize_max;
struct rcu_head rcu;
struct nft_pipapo_field f[] __counted_by(field_count);
diff --git a/net/netfilter/nft_set_pipapo_avx2.c b/net/netfilter/nft_set_pipapo_avx2.c
index 52e0d026d30a..78213c73af2e 100644
--- a/net/netfilter/nft_set_pipapo_avx2.c
+++ b/net/netfilter/nft_set_pipapo_avx2.c
@@ -71,9 +71,6 @@
#define NFT_PIPAPO_AVX2_ZERO(reg) \
asm volatile("vpxor %ymm" #reg ", %ymm" #reg ", %ymm" #reg)
-/* Current working bitmap index, toggled between field matches */
-static DEFINE_PER_CPU(bool, nft_pipapo_avx2_scratch_index);
-
/**
* nft_pipapo_avx2_prepare() - Prepare before main algorithm body
*
@@ -1120,11 +1117,12 @@ bool nft_pipapo_avx2_lookup(const struct net *net, const struct nft_set *set,
const u32 *key, const struct nft_set_ext **ext)
{
struct nft_pipapo *priv = nft_set_priv(set);
- unsigned long *res, *fill, *scratch;
+ struct nft_pipapo_scratch *scratch;
u8 genmask = nft_genmask_cur(net);
const u8 *rp = (const u8 *)key;
struct nft_pipapo_match *m;
struct nft_pipapo_field *f;
+ unsigned long *res, *fill;
bool map_index;
int i, ret = 0;
@@ -1146,10 +1144,11 @@ bool nft_pipapo_avx2_lookup(const struct net *net, const struct nft_set *set,
kernel_fpu_end();
return false;
}
- map_index = raw_cpu_read(nft_pipapo_avx2_scratch_index);
- res = scratch + (map_index ? m->bsize_max : 0);
- fill = scratch + (map_index ? 0 : m->bsize_max);
+ map_index = scratch->map_index;
+
+ res = scratch->map + (map_index ? m->bsize_max : 0);
+ fill = scratch->map + (map_index ? 0 : m->bsize_max);
/* Starting map doesn't need to be set for this implementation */
@@ -1221,7 +1220,7 @@ next_match:
out:
if (i % 2)
- raw_cpu_write(nft_pipapo_avx2_scratch_index, !map_index);
+ scratch->map_index = !map_index;
kernel_fpu_end();
return ret >= 0;
generated by cgit (git 2.34.1) at 2024-06-19 01:18:27 +0000