[PATCH 6.8 017/158] netfilter: nft_set_pipapo: constify lookup fn args where possible

Greg Kroah-Hartman
2024-04-23T21:40:57Z

From: Florian Westphal <fw@strlen.de>

[ Upstream commit f04df573faf90bb828a2241b650598c02c074323 ]

Those get called from packet path, content must not be modified.
No functional changes intended.

Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Stable-dep-of: 29b359cf6d95 ("netfilter: nft_set_pipapo: walk over current view on netlink dump")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/netfilter/nft_set_pipapo.c | 18 +++++----
net/netfilter/nft_set_pipapo.h | 6 +--
net/netfilter/nft_set_pipapo_avx2.c | 59 +++++++++++++++++------------
3 files changed, 48 insertions(+), 35 deletions(-)

diff --git a/net/netfilter/nft_set_pipapo.c b/net/netfilter/nft_set_pipapo.c
index b3b282de802de..7756d70af868c 100644
--- a/net/netfilter/nft_set_pipapo.c
+++ b/net/netfilter/nft_set_pipapo.c
@@ -360,7 +360,7 @@
* Return: -1 on no match, bit position on 'match_only', 0 otherwise.
*/
int pipapo_refill(unsigned long *map, int len, int rules, unsigned long *dst,
- union nft_pipapo_map_bucket *mt, bool match_only)
+ const union nft_pipapo_map_bucket *mt, bool match_only)
{
unsigned long bitset;
int k, ret = -1;
@@ -412,9 +412,9 @@ bool nft_pipapo_lookup(const struct net *net, const struct nft_set *set,
struct nft_pipapo_scratch *scratch;
unsigned long *res_map, *fill_map;
u8 genmask = nft_genmask_cur(net);
+ const struct nft_pipapo_match *m;
+ const struct nft_pipapo_field *f;
const u8 *rp = (const u8 *)key;
- struct nft_pipapo_match *m;
- struct nft_pipapo_field *f;
bool map_index;
int i;

@@ -519,11 +519,13 @@ static struct nft_pipapo_elem *pipapo_get(const struct net *net,
{
struct nft_pipapo_elem *ret = ERR_PTR(-ENOENT);
struct nft_pipapo *priv = nft_set_priv(set);
- struct nft_pipapo_match *m = priv->clone;
unsigned long *res_map, *fill_map = NULL;
- struct nft_pipapo_field *f;
+ const struct nft_pipapo_match *m;
+ const struct nft_pipapo_field *f;
int i;

+ m = priv->clone;
+
res_map = kmalloc_array(m->bsize_max, sizeof(*res_map), GFP_ATOMIC);
if (!res_map) {
ret = ERR_PTR(-ENOMEM);
@@ -1597,7 +1599,7 @@ static void pipapo_gc(struct nft_set *set, struct nft_pipapo_match *m)

while ((rules_f0 = pipapo_rules_same_key(m->f, first_rule))) {
union nft_pipapo_map_bucket rulemap[NFT_PIPAPO_MAX_FIELDS];
- struct nft_pipapo_field *f;
+ const struct nft_pipapo_field *f;
int i, start, rules_fx;

start = first_rule;
@@ -2039,8 +2041,8 @@ static void nft_pipapo_walk(const struct nft_ctx *ctx, struct nft_set *set,
{
struct nft_pipapo *priv = nft_set_priv(set);
struct net *net = read_pnet(&set->net);
- struct nft_pipapo_match *m;
- struct nft_pipapo_field *f;
+ const struct nft_pipapo_match *m;
+ const struct nft_pipapo_field *f;
int i, r;

rcu_read_lock();
diff --git a/net/netfilter/nft_set_pipapo.h b/net/netfilter/nft_set_pipapo.h
index 3842c7341a9f4..42464e7c24ac0 100644
--- a/net/netfilter/nft_set_pipapo.h
+++ b/net/netfilter/nft_set_pipapo.h
@@ -187,7 +187,7 @@ struct nft_pipapo_elem {
};

int pipapo_refill(unsigned long *map, int len, int rules, unsigned long *dst,
- union nft_pipapo_map_bucket *mt, bool match_only);
+ const union nft_pipapo_map_bucket *mt, bool match_only);

/**
* pipapo_and_field_buckets_4bit() - Intersect 4-bit buckets
@@ -195,7 +195,7 @@ int pipapo_refill(unsigned long *map, int len, int rules, unsigned long *dst,
* @dst: Area to store result
* @data: Input data selecting table buckets
*/
-static inline void pipapo_and_field_buckets_4bit(struct nft_pipapo_field *f,
+static inline void pipapo_and_field_buckets_4bit(const struct nft_pipapo_field *f,
unsigned long *dst,
const u8 *data)
{
@@ -223,7 +223,7 @@ static inline void pipapo_and_field_buckets_4bit(struct nft_pipapo_field *f,
* @dst: Area to store result
* @data: Input data selecting table buckets
*/
-static inline void pipapo_and_field_buckets_8bit(struct nft_pipapo_field *f,
+static inline void pipapo_and_field_buckets_8bit(const struct nft_pipapo_field *f,
unsigned long *dst,
const u8 *data)
{
diff --git a/net/netfilter/nft_set_pipapo_avx2.c b/net/netfilter/nft_set_pipapo_avx2.c
index a3a8ddca99189..d08407d589eac 100644
--- a/net/netfilter/nft_set_pipapo_avx2.c
+++ b/net/netfilter/nft_set_pipapo_avx2.c
@@ -212,8 +212,9 @@ static int nft_pipapo_avx2_refill(int offset, unsigned long *map,
* word index to be checked next (i.e. first filled word).
*/
static int nft_pipapo_avx2_lookup_4b_2(unsigned long *map, unsigned long *fill,
- struct nft_pipapo_field *f, int offset,
- const u8 *pkt, bool first, bool last)
+ const struct nft_pipapo_field *f,
+ int offset, const u8 *pkt,
+ bool first, bool last)
{
int i, ret = -1, m256_size = f->bsize / NFT_PIPAPO_LONGS_PER_M256, b;
u8 pg[2] = { pkt[0] >> 4, pkt[0] & 0xf };
@@ -274,8 +275,9 @@ static int nft_pipapo_avx2_lookup_4b_2(unsigned long *map, unsigned long *fill,
* word index to be checked next (i.e. first filled word).
*/
static int nft_pipapo_avx2_lookup_4b_4(unsigned long *map, unsigned long *fill,
- struct nft_pipapo_field *f, int offset,
- const u8 *pkt, bool first, bool last)
+ const struct nft_pipapo_field *f,
+ int offset, const u8 *pkt,
+ bool first, bool last)
{
int i, ret = -1, m256_size = f->bsize / NFT_PIPAPO_LONGS_PER_M256, b;
u8 pg[4] = { pkt[0] >> 4, pkt[0] & 0xf, pkt[1] >> 4, pkt[1] & 0xf };
@@ -350,8 +352,9 @@ static int nft_pipapo_avx2_lookup_4b_4(unsigned long *map, unsigned long *fill,
* word index to be checked next (i.e. first filled word).
*/
static int nft_pipapo_avx2_lookup_4b_8(unsigned long *map, unsigned long *fill,
- struct nft_pipapo_field *f, int offset,
- const u8 *pkt, bool first, bool last)
+ const struct nft_pipapo_field *f,
+ int offset, const u8 *pkt,
+ bool first, bool last)
{
u8 pg[8] = { pkt[0] >> 4, pkt[0] & 0xf, pkt[1] >> 4, pkt[1] & 0xf,
pkt[2] >> 4, pkt[2] & 0xf, pkt[3] >> 4, pkt[3] & 0xf,
@@ -445,8 +448,9 @@ static int nft_pipapo_avx2_lookup_4b_8(unsigned long *map, unsigned long *fill,
* word index to be checked next (i.e. first filled word).
*/
static int nft_pipapo_avx2_lookup_4b_12(unsigned long *map, unsigned long *fill,
- struct nft_pipapo_field *f, int offset,
- const u8 *pkt, bool first, bool last)
+ const struct nft_pipapo_field *f,
+ int offset, const u8 *pkt,
+ bool first, bool last)
{
u8 pg[12] = { pkt[0] >> 4, pkt[0] & 0xf, pkt[1] >> 4, pkt[1] & 0xf,
pkt[2] >> 4, pkt[2] & 0xf, pkt[3] >> 4, pkt[3] & 0xf,
@@ -534,8 +538,9 @@ static int nft_pipapo_avx2_lookup_4b_12(unsigned long *map, unsigned long *fill,
* word index to be checked next (i.e. first filled word).
*/
static int nft_pipapo_avx2_lookup_4b_32(unsigned long *map, unsigned long *fill,
- struct nft_pipapo_field *f, int offset,
- const u8 *pkt, bool first, bool last)
+ const struct nft_pipapo_field *f,
+ int offset, const u8 *pkt,
+ bool first, bool last)
{
u8 pg[32] = { pkt[0] >> 4, pkt[0] & 0xf, pkt[1] >> 4, pkt[1] & 0xf,
pkt[2] >> 4, pkt[2] & 0xf, pkt[3] >> 4, pkt[3] & 0xf,
@@ -669,8 +674,9 @@ static int nft_pipapo_avx2_lookup_4b_32(unsigned long *map, unsigned long *fill,
* word index to be checked next (i.e. first filled word).
*/
static int nft_pipapo_avx2_lookup_8b_1(unsigned long *map, unsigned long *fill,
- struct nft_pipapo_field *f, int offset,
- const u8 *pkt, bool first, bool last)
+ const struct nft_pipapo_field *f,
+ int offset, const u8 *pkt,
+ bool first, bool last)
{
int i, ret = -1, m256_size = f->bsize / NFT_PIPAPO_LONGS_PER_M256, b;
unsigned long *lt = f->lt, bsize = f->bsize;
@@ -726,8 +732,9 @@ static int nft_pipapo_avx2_lookup_8b_1(unsigned long *map, unsigned long *fill,
* word index to be checked next (i.e. first filled word).
*/
static int nft_pipapo_avx2_lookup_8b_2(unsigned long *map, unsigned long *fill,
- struct nft_pipapo_field *f, int offset,
- const u8 *pkt, bool first, bool last)
+ const struct nft_pipapo_field *f,
+ int offset, const u8 *pkt,
+ bool first, bool last)
{
int i, ret = -1, m256_size = f->bsize / NFT_PIPAPO_LONGS_PER_M256, b;
unsigned long *lt = f->lt, bsize = f->bsize;
@@ -790,8 +797,9 @@ static int nft_pipapo_avx2_lookup_8b_2(unsigned long *map, unsigned long *fill,
* word index to be checked next (i.e. first filled word).
*/
static int nft_pipapo_avx2_lookup_8b_4(unsigned long *map, unsigned long *fill,
- struct nft_pipapo_field *f, int offset,
- const u8 *pkt, bool first, bool last)
+ const struct nft_pipapo_field *f,
+ int offset, const u8 *pkt,
+ bool first, bool last)
{
int i, ret = -1, m256_size = f->bsize / NFT_PIPAPO_LONGS_PER_M256, b;
unsigned long *lt = f->lt, bsize = f->bsize;
@@ -865,8 +873,9 @@ static int nft_pipapo_avx2_lookup_8b_4(unsigned long *map, unsigned long *fill,
* word index to be checked next (i.e. first filled word).
*/
static int nft_pipapo_avx2_lookup_8b_6(unsigned long *map, unsigned long *fill,
- struct nft_pipapo_field *f, int offset,
- const u8 *pkt, bool first, bool last)
+ const struct nft_pipapo_field *f,
+ int offset, const u8 *pkt,
+ bool first, bool last)
{
int i, ret = -1, m256_size = f->bsize / NFT_PIPAPO_LONGS_PER_M256, b;
unsigned long *lt = f->lt, bsize = f->bsize;
@@ -950,8 +959,9 @@ static int nft_pipapo_avx2_lookup_8b_6(unsigned long *map, unsigned long *fill,
* word index to be checked next (i.e. first filled word).
*/
static int nft_pipapo_avx2_lookup_8b_16(unsigned long *map, unsigned long *fill,
- struct nft_pipapo_field *f, int offset,
- const u8 *pkt, bool first, bool last)
+ const struct nft_pipapo_field *f,
+ int offset, const u8 *pkt,
+ bool first, bool last)
{
int i, ret = -1, m256_size = f->bsize / NFT_PIPAPO_LONGS_PER_M256, b;
unsigned long *lt = f->lt, bsize = f->bsize;
@@ -1042,8 +1052,9 @@ static int nft_pipapo_avx2_lookup_8b_16(unsigned long *map, unsigned long *fill,
* word index to be checked next (i.e. first filled word).
*/
static int nft_pipapo_avx2_lookup_slow(unsigned long *map, unsigned long *fill,
- struct nft_pipapo_field *f, int offset,
- const u8 *pkt, bool first, bool last)
+ const struct nft_pipapo_field *f,
+ int offset, const u8 *pkt,
+ bool first, bool last)
{
unsigned long bsize = f->bsize;
int i, ret = -1, b;
@@ -1119,9 +1130,9 @@ bool nft_pipapo_avx2_lookup(const struct net *net, const struct nft_set *set,
struct nft_pipapo *priv = nft_set_priv(set);
struct nft_pipapo_scratch *scratch;
u8 genmask = nft_genmask_cur(net);
+ const struct nft_pipapo_match *m;
+ const struct nft_pipapo_field *f;
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;
--
2.43.0