[PATCH net-next 00/14] Netfilter updates for net-next

[PATCH net-next 00/14] Netfilter updates for net-next

[Pablo Neira Ayuso]

Hi,

The following patchset contains Netfilter updates for net-next:

1) Extended netlink error reporting if nfnetlink attribute parser fails,
   from Donald Hunter.

2) Incorrect request_module() module, from Simon Horman.

3) A series of patches to reduce memory consumption for set element transactions.
   Florian Westphal says:

"When doing a flush on a set or mass adding/removing elements from a
set, each element needs to allocate 96 bytes to hold the transactional
state.

In such cases, virtually all the information in struct nft_trans_elem
is the same.

Change nft_trans_elem to a flex-array, i.e. a single nft_trans_elem
can hold multiple set element pointers.

The number of elements that can be stored in one nft_trans_elem is limited
by the slab allocator, this series limits the compaction to at most 62
elements as it caps the reallocation to 2048 bytes of memory."

4) A series of patches to prepare the transition to dscp_t in .flowi_tos.
   From Guillaume Nault.

5) Support for bitwise operations with two source registers,
   from Jeremy Sowden.

Please, pull these changes from:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next.git nf-next-24-11-15

Thanks.

----------------------------------------------------------------

The following changes since commit 544070db6c8b0c403e4c6befbc76b52831b897da:

  Merge branch 'mlx5-esw-qos-refactor-and-shampo-cleanup' (2024-11-11 19:28:20 -0800)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next.git tags/nf-next-24-11-15

for you to fetch changes up to b0ccf4f53d968e794a4ea579d5135cc1aaf1a53f:

  netfilter: bitwise: add support for doing AND, OR and XOR directly (2024-11-15 12:07:04 +0100)

----------------------------------------------------------------
netfilter pull request 24-11-15

----------------------------------------------------------------
Donald Hunter (1):
      netfilter: nfnetlink: Report extack policy errors for batched ops

Florian Westphal (5):
      netfilter: nf_tables: add nft_trans_commit_list_add_elem helper
      netfilter: nf_tables: prepare for multiple elements in nft_trans_elem structure
      netfilter: nf_tables: prepare nft audit for set element compaction
      netfilter: nf_tables: switch trans_elem to real flex array
      netfilter: nf_tables: allocate element update information dynamically

Guillaume Nault (5):
      netfilter: ipv4: Convert ip_route_me_harder() to dscp_t.
      netfilter: flow_offload: Convert nft_flow_route() to dscp_t.
      netfilter: rpfilter: Convert rpfilter_mt() to dscp_t.
      netfilter: nft_fib: Convert nft_fib4_eval() to dscp_t.
      netfilter: nf_dup4: Convert nf_dup_ipv4_route() to dscp_t.

Jeremy Sowden (2):
      netfilter: bitwise: rename some boolean operation functions
      netfilter: bitwise: add support for doing AND, OR and XOR directly

Simon Horman (1):
      netfilter: bpf: Pass string literal as format argument of request_module()

 include/net/netfilter/nf_tables.h        |  25 +-
 include/uapi/linux/netfilter/nf_tables.h |  18 +-
 net/ipv4/netfilter.c                     |   2 +-
 net/ipv4/netfilter/ipt_rpfilter.c        |   2 +-
 net/ipv4/netfilter/nf_dup_ipv4.c         |   2 +-
 net/ipv4/netfilter/nft_fib_ipv4.c        |   3 +-
 net/netfilter/nf_bpf_link.c              |   2 +-
 net/netfilter/nf_tables_api.c            | 385 ++++++++++++++++++++++++-------
 net/netfilter/nfnetlink.c                |   2 +-
 net/netfilter/nft_bitwise.c              | 166 ++++++++++---
 net/netfilter/nft_flow_offload.c         |   4 +-
 11 files changed, 484 insertions(+), 127 deletions(-)

[PATCH net-next 01/14] netfilter: nfnetlink: Report extack policy errors for batched ops

[Pablo Neira Ayuso]

From: Donald Hunter <donald.hunter@gmail.com>

The nftables batch processing does not currently populate extack with
policy errors. Fix this by passing extack when parsing batch messages.

Signed-off-by: Donald Hunter <donald.hunter@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nfnetlink.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c
index 7784ec094097..e598a2a252b0 100644
--- a/net/netfilter/nfnetlink.c
+++ b/net/netfilter/nfnetlink.c
@@ -517,7 +517,7 @@ static void nfnetlink_rcv_batch(struct sk_buff *skb, struct nlmsghdr *nlh,
 			err = nla_parse_deprecated(cda,
 						   ss->cb[cb_id].attr_count,
 						   attr, attrlen,
-						   ss->cb[cb_id].policy, NULL);
+						   ss->cb[cb_id].policy, &extack);
 			if (err < 0)
 				goto ack;
 
-- 
2.30.2

[PATCH net-next 02/14] netfilter: bpf: Pass string literal as format argument of request_module()

[Pablo Neira Ayuso]

From: Simon Horman <horms@kernel.org>

Both gcc-14 and clang-18 report that passing a non-string literal as the
format argument of request_module() is potentially insecure.

E.g. clang-18 says:

.../nf_bpf_link.c:46:24: warning: format string is not a string literal (potentially insecure) [-Wformat-security]
   46 |                 err = request_module(mod);
      |                                      ^~~
.../kmod.h:25:55: note: expanded from macro 'request_module'
   25 | #define request_module(mod...) __request_module(true, mod)
      |                                                       ^~~
.../nf_bpf_link.c:46:24: note: treat the string as an argument to avoid this
   46 |                 err = request_module(mod);
      |                                      ^
      |                                      "%s",
.../kmod.h:25:55: note: expanded from macro 'request_module'
   25 | #define request_module(mod...) __request_module(true, mod)
      |                                                       ^

It is always the case where the contents of mod is safe to pass as the
format argument. That is, in my understanding, it never contains any
format escape sequences.

But, it seems better to be safe than sorry. And, as a bonus, compiler
output becomes less verbose by addressing this issue as suggested by
clang-18.

Compile tested only.

Signed-off-by: Simon Horman <horms@kernel.org>
Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nf_bpf_link.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netfilter/nf_bpf_link.c b/net/netfilter/nf_bpf_link.c
index 3d64a4511fcf..06b084844700 100644
--- a/net/netfilter/nf_bpf_link.c
+++ b/net/netfilter/nf_bpf_link.c
@@ -43,7 +43,7 @@ get_proto_defrag_hook(struct bpf_nf_link *link,
 	hook = rcu_dereference(*ptr_global_hook);
 	if (!hook) {
 		rcu_read_unlock();
-		err = request_module(mod);
+		err = request_module("%s", mod);
 		if (err)
 			return ERR_PTR(err < 0 ? err : -EINVAL);
 
-- 
2.30.2

[PATCH net-next 03/14] netfilter: nf_tables: add nft_trans_commit_list_add_elem helper

[Pablo Neira Ayuso]

From: Florian Westphal <fw@strlen.de>

Add and use a wrapper to append trans_elem structures to the
transaction log.

Unlike the existing helper, pass a gfp_t to indicate if sleeping
is allowed.

This will be used by a followup patch to realloc nft_trans_elem
structures after they gain a flexible array member to reduce
number of such container structures on the transaction list.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nf_tables_api.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 6090ba9f1bb2..75c84b17ab99 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -421,6 +421,17 @@ static void nft_trans_commit_list_add_tail(struct net *net, struct nft_trans *tr
 	}
 }
 
+static void nft_trans_commit_list_add_elem(struct net *net, struct nft_trans *trans,
+					   gfp_t gfp)
+{
+	WARN_ON_ONCE(trans->msg_type != NFT_MSG_NEWSETELEM &&
+		     trans->msg_type != NFT_MSG_DELSETELEM);
+
+	might_alloc(gfp);
+
+	nft_trans_commit_list_add_tail(net, trans);
+}
+
 static int nft_trans_table_add(struct nft_ctx *ctx, int msg_type)
 {
 	struct nft_trans *trans;
@@ -7205,7 +7216,7 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
 					if (update_flags) {
 						nft_trans_elem_priv(trans) = elem_priv;
 						nft_trans_elem_update_flags(trans) = update_flags;
-						nft_trans_commit_list_add_tail(ctx->net, trans);
+						nft_trans_commit_list_add_elem(ctx->net, trans, GFP_KERNEL);
 						goto err_elem_free;
 					}
 				}
@@ -7229,7 +7240,7 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
 	}
 
 	nft_trans_elem_priv(trans) = elem.priv;
-	nft_trans_commit_list_add_tail(ctx->net, trans);
+	nft_trans_commit_list_add_elem(ctx->net, trans, GFP_KERNEL);
 	return 0;
 
 err_set_full:
@@ -7446,7 +7457,7 @@ static int nft_del_setelem(struct nft_ctx *ctx, struct nft_set *set,
 	nft_setelem_data_deactivate(ctx->net, set, elem.priv);
 
 	nft_trans_elem_priv(trans) = elem.priv;
-	nft_trans_commit_list_add_tail(ctx->net, trans);
+	nft_trans_commit_list_add_elem(ctx->net, trans, GFP_KERNEL);
 	return 0;
 
 fail_ops:
@@ -7482,7 +7493,7 @@ static int nft_setelem_flush(const struct nft_ctx *ctx,
 	nft_setelem_data_deactivate(ctx->net, set, elem_priv);
 	nft_trans_elem_set(trans) = set;
 	nft_trans_elem_priv(trans) = elem_priv;
-	nft_trans_commit_list_add_tail(ctx->net, trans);
+	nft_trans_commit_list_add_elem(ctx->net, trans, GFP_ATOMIC);
 
 	return 0;
 }
@@ -7499,7 +7510,7 @@ static int __nft_set_catchall_flush(const struct nft_ctx *ctx,
 
 	nft_setelem_data_deactivate(ctx->net, set, elem_priv);
 	nft_trans_elem_priv(trans) = elem_priv;
-	nft_trans_commit_list_add_tail(ctx->net, trans);
+	nft_trans_commit_list_add_elem(ctx->net, trans, GFP_KERNEL);
 
 	return 0;
 }
-- 
2.30.2

[PATCH net-next 04/14] netfilter: nf_tables: prepare for multiple elements in nft_trans_elem structure

[Pablo Neira Ayuso]

From: Florian Westphal <fw@strlen.de>

Add helpers to release the individual elements contained in the
trans_elem container structure.

No functional change intended.

Followup patch will add 'nelems' member and will turn 'priv' into
a flexible array.

These helpers can then loop over all elements.
Care needs to be taken to handle a mix of new elements and existing
elements that are being updated (e.g. timeout refresh).

Before this patch, NEWSETELEM transaction with update is released
early so nft_trans_set_elem_destroy() won't get called, so we need
to skip elements marked as update.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 include/net/netfilter/nf_tables.h |  21 ++-
 net/netfilter/nf_tables_api.c     | 228 +++++++++++++++++++++---------
 2 files changed, 173 insertions(+), 76 deletions(-)

diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index f24278767bfd..37af0b174c39 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -1759,28 +1759,25 @@ enum nft_trans_elem_flags {
 	NFT_TRANS_UPD_EXPIRATION	= (1 << 1),
 };
 
-struct nft_trans_elem {
-	struct nft_trans		nft_trans;
-	struct nft_set			*set;
-	struct nft_elem_priv		*elem_priv;
+struct nft_trans_one_elem {
+	struct nft_elem_priv		*priv;
 	u64				timeout;
 	u64				expiration;
 	u8				update_flags;
+};
+
+struct nft_trans_elem {
+	struct nft_trans		nft_trans;
+	struct nft_set			*set;
 	bool				bound;
+	unsigned int			nelems;
+	struct nft_trans_one_elem	elems[] __counted_by(nelems);
 };
 
 #define nft_trans_container_elem(t)			\
 	container_of(t, struct nft_trans_elem, nft_trans)
 #define nft_trans_elem_set(trans)			\
 	nft_trans_container_elem(trans)->set
-#define nft_trans_elem_priv(trans)			\
-	nft_trans_container_elem(trans)->elem_priv
-#define nft_trans_elem_update_flags(trans)		\
-	nft_trans_container_elem(trans)->update_flags
-#define nft_trans_elem_timeout(trans)			\
-	nft_trans_container_elem(trans)->timeout
-#define nft_trans_elem_expiration(trans)		\
-	nft_trans_container_elem(trans)->expiration
 #define nft_trans_elem_set_bound(trans)			\
 	nft_trans_container_elem(trans)->bound
 
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 75c84b17ab99..0882f78c2204 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -6446,13 +6446,17 @@ static struct nft_trans *nft_trans_elem_alloc(const struct nft_ctx *ctx,
 					      int msg_type,
 					      struct nft_set *set)
 {
+	struct nft_trans_elem *te;
 	struct nft_trans *trans;
 
-	trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_elem));
+	trans = nft_trans_alloc(ctx, msg_type, struct_size(te, elems, 1));
 	if (trans == NULL)
 		return NULL;
 
-	nft_trans_elem_set(trans) = set;
+	te = nft_trans_container_elem(trans);
+	te->nelems = 1;
+	te->set = set;
+
 	return trans;
 }
 
@@ -6574,28 +6578,51 @@ static void nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
 }
 
 /* Drop references and destroy. Called from gc, dynset and abort path. */
-void nft_set_elem_destroy(const struct nft_set *set,
-			  const struct nft_elem_priv *elem_priv,
-			  bool destroy_expr)
+static void __nft_set_elem_destroy(const struct nft_ctx *ctx,
+				   const struct nft_set *set,
+				   const struct nft_elem_priv *elem_priv,
+				   bool destroy_expr)
 {
 	struct nft_set_ext *ext = nft_set_elem_ext(set, elem_priv);
-	struct nft_ctx ctx = {
-		.net	= read_pnet(&set->net),
-		.family	= set->table->family,
-	};
 
 	nft_data_release(nft_set_ext_key(ext), NFT_DATA_VALUE);
 	if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
 		nft_data_release(nft_set_ext_data(ext), set->dtype);
 	if (destroy_expr && nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
-		nft_set_elem_expr_destroy(&ctx, nft_set_ext_expr(ext));
+		nft_set_elem_expr_destroy(ctx, nft_set_ext_expr(ext));
 	if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
 		nft_use_dec(&(*nft_set_ext_obj(ext))->use);
 
 	kfree(elem_priv);
 }
+
+/* Drop references and destroy. Called from gc and dynset. */
+void nft_set_elem_destroy(const struct nft_set *set,
+			  const struct nft_elem_priv *elem_priv,
+			  bool destroy_expr)
+{
+	struct nft_ctx ctx = {
+		.net	= read_pnet(&set->net),
+		.family	= set->table->family,
+	};
+
+	__nft_set_elem_destroy(&ctx, set, elem_priv, destroy_expr);
+}
 EXPORT_SYMBOL_GPL(nft_set_elem_destroy);
 
+/* Drop references and destroy. Called from abort path. */
+static void nft_trans_set_elem_destroy(const struct nft_ctx *ctx, struct nft_trans_elem *te)
+{
+	int i;
+
+	for (i = 0; i < te->nelems; i++) {
+		if (te->elems[i].update_flags)
+			continue;
+
+		__nft_set_elem_destroy(ctx, te->set, te->elems[i].priv, true);
+	}
+}
+
 /* Destroy element. References have been already dropped in the preparation
  * path via nft_setelem_data_deactivate().
  */
@@ -6611,6 +6638,15 @@ void nf_tables_set_elem_destroy(const struct nft_ctx *ctx,
 	kfree(elem_priv);
 }
 
+static void nft_trans_elems_destroy(const struct nft_ctx *ctx,
+				    const struct nft_trans_elem *te)
+{
+	int i;
+
+	for (i = 0; i < te->nelems; i++)
+		nf_tables_set_elem_destroy(ctx, te->set, te->elems[i].priv);
+}
+
 int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set,
 			    struct nft_expr *expr_array[])
 {
@@ -6767,6 +6803,36 @@ static void nft_setelem_activate(struct net *net, struct nft_set *set,
 	}
 }
 
+static void nft_trans_elem_update(const struct nft_set *set,
+				  const struct nft_trans_one_elem *elem)
+{
+	const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
+
+	if (elem->update_flags & NFT_TRANS_UPD_TIMEOUT)
+		WRITE_ONCE(nft_set_ext_timeout(ext)->timeout, elem->timeout);
+
+	if (elem->update_flags & NFT_TRANS_UPD_EXPIRATION)
+		WRITE_ONCE(nft_set_ext_timeout(ext)->expiration, get_jiffies_64() + elem->expiration);
+}
+
+static void nft_trans_elems_add(const struct nft_ctx *ctx,
+				struct nft_trans_elem *te)
+{
+	int i;
+
+	for (i = 0; i < te->nelems; i++) {
+		const struct nft_trans_one_elem *elem = &te->elems[i];
+
+		if (elem->update_flags)
+			nft_trans_elem_update(te->set, elem);
+		else
+			nft_setelem_activate(ctx->net, te->set, elem->priv);
+
+		nf_tables_setelem_notify(ctx, te->set, elem->priv,
+					 NFT_MSG_NEWSETELEM);
+	}
+}
+
 static int nft_setelem_catchall_deactivate(const struct net *net,
 					   struct nft_set *set,
 					   struct nft_set_elem *elem)
@@ -6849,6 +6915,24 @@ static void nft_setelem_remove(const struct net *net,
 		set->ops->remove(net, set, elem_priv);
 }
 
+static void nft_trans_elems_remove(const struct nft_ctx *ctx,
+				   const struct nft_trans_elem *te)
+{
+	int i;
+
+	for (i = 0; i < te->nelems; i++) {
+		nf_tables_setelem_notify(ctx, te->set,
+					 te->elems[i].priv,
+					 te->nft_trans.msg_type);
+
+		nft_setelem_remove(ctx->net, te->set, te->elems[i].priv);
+		if (!nft_setelem_is_catchall(te->set, te->elems[i].priv)) {
+			atomic_dec(&te->set->nelems);
+			te->set->ndeact--;
+		}
+	}
+}
+
 static bool nft_setelem_valid_key_end(const struct nft_set *set,
 				      struct nlattr **nla, u32 flags)
 {
@@ -7200,22 +7284,26 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
 			else if (!(nlmsg_flags & NLM_F_EXCL)) {
 				err = 0;
 				if (nft_set_ext_exists(ext2, NFT_SET_EXT_TIMEOUT)) {
+					struct nft_trans_one_elem *update;
+
+					update = &nft_trans_container_elem(trans)->elems[0];
+
 					update_flags = 0;
 					if (timeout != nft_set_ext_timeout(ext2)->timeout) {
-						nft_trans_elem_timeout(trans) = timeout;
+						update->timeout = timeout;
 						if (expiration == 0)
 							expiration = timeout;
 
 						update_flags |= NFT_TRANS_UPD_TIMEOUT;
 					}
 					if (expiration) {
-						nft_trans_elem_expiration(trans) = expiration;
+						update->expiration = expiration;
 						update_flags |= NFT_TRANS_UPD_EXPIRATION;
 					}
 
 					if (update_flags) {
-						nft_trans_elem_priv(trans) = elem_priv;
-						nft_trans_elem_update_flags(trans) = update_flags;
+						update->priv = elem_priv;
+						update->update_flags = update_flags;
 						nft_trans_commit_list_add_elem(ctx->net, trans, GFP_KERNEL);
 						goto err_elem_free;
 					}
@@ -7239,7 +7327,7 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
 		}
 	}
 
-	nft_trans_elem_priv(trans) = elem.priv;
+	nft_trans_container_elem(trans)->elems[0].priv = elem.priv;
 	nft_trans_commit_list_add_elem(ctx->net, trans, GFP_KERNEL);
 	return 0;
 
@@ -7377,6 +7465,50 @@ void nft_setelem_data_deactivate(const struct net *net,
 		nft_use_dec(&(*nft_set_ext_obj(ext))->use);
 }
 
+/* similar to nft_trans_elems_remove, but called from abort path to undo newsetelem.
+ * No notifications and no ndeact changes.
+ *
+ * Returns true if set had been added to (i.e., elements need to be removed again).
+ */
+static bool nft_trans_elems_new_abort(const struct nft_ctx *ctx,
+				      const struct nft_trans_elem *te)
+{
+	bool removed = false;
+	int i;
+
+	for (i = 0; i < te->nelems; i++) {
+		if (te->elems[i].update_flags)
+			continue;
+
+		if (!te->set->ops->abort || nft_setelem_is_catchall(te->set, te->elems[i].priv))
+			nft_setelem_remove(ctx->net, te->set, te->elems[i].priv);
+
+		if (!nft_setelem_is_catchall(te->set, te->elems[i].priv))
+			atomic_dec(&te->set->nelems);
+
+		removed = true;
+	}
+
+	return removed;
+}
+
+/* Called from abort path to undo DELSETELEM/DESTROYSETELEM. */
+static void nft_trans_elems_destroy_abort(const struct nft_ctx *ctx,
+					  const struct nft_trans_elem *te)
+{
+	int i;
+
+	for (i = 0; i < te->nelems; i++) {
+		if (!nft_setelem_active_next(ctx->net, te->set, te->elems[i].priv)) {
+			nft_setelem_data_activate(ctx->net, te->set, te->elems[i].priv);
+			nft_setelem_activate(ctx->net, te->set, te->elems[i].priv);
+		}
+
+		if (!nft_setelem_is_catchall(te->set, te->elems[i].priv))
+			te->set->ndeact--;
+	}
+}
+
 static int nft_del_setelem(struct nft_ctx *ctx, struct nft_set *set,
 			   const struct nlattr *attr)
 {
@@ -7456,7 +7588,7 @@ static int nft_del_setelem(struct nft_ctx *ctx, struct nft_set *set,
 
 	nft_setelem_data_deactivate(ctx->net, set, elem.priv);
 
-	nft_trans_elem_priv(trans) = elem.priv;
+	nft_trans_container_elem(trans)->elems[0].priv = elem.priv;
 	nft_trans_commit_list_add_elem(ctx->net, trans, GFP_KERNEL);
 	return 0;
 
@@ -7483,7 +7615,8 @@ static int nft_setelem_flush(const struct nft_ctx *ctx,
 		return 0;
 
 	trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
-				    sizeof(struct nft_trans_elem), GFP_ATOMIC);
+				    struct_size_t(struct nft_trans_elem, elems, 1),
+				    GFP_ATOMIC);
 	if (!trans)
 		return -ENOMEM;
 
@@ -7492,7 +7625,8 @@ static int nft_setelem_flush(const struct nft_ctx *ctx,
 
 	nft_setelem_data_deactivate(ctx->net, set, elem_priv);
 	nft_trans_elem_set(trans) = set;
-	nft_trans_elem_priv(trans) = elem_priv;
+	nft_trans_container_elem(trans)->nelems = 1;
+	nft_trans_container_elem(trans)->elems[0].priv = elem_priv;
 	nft_trans_commit_list_add_elem(ctx->net, trans, GFP_ATOMIC);
 
 	return 0;
@@ -7509,7 +7643,7 @@ static int __nft_set_catchall_flush(const struct nft_ctx *ctx,
 		return -ENOMEM;
 
 	nft_setelem_data_deactivate(ctx->net, set, elem_priv);
-	nft_trans_elem_priv(trans) = elem_priv;
+	nft_trans_container_elem(trans)->elems[0].priv = elem_priv;
 	nft_trans_commit_list_add_elem(ctx->net, trans, GFP_KERNEL);
 
 	return 0;
@@ -9691,9 +9825,7 @@ static void nft_commit_release(struct nft_trans *trans)
 		break;
 	case NFT_MSG_DELSETELEM:
 	case NFT_MSG_DESTROYSETELEM:
-		nf_tables_set_elem_destroy(&ctx,
-					   nft_trans_elem_set(trans),
-					   nft_trans_elem_priv(trans));
+		nft_trans_elems_destroy(&ctx, nft_trans_container_elem(trans));
 		break;
 	case NFT_MSG_DELOBJ:
 	case NFT_MSG_DESTROYOBJ:
@@ -10546,25 +10678,8 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
 		case NFT_MSG_NEWSETELEM:
 			te = nft_trans_container_elem(trans);
 
-			if (te->update_flags) {
-				const struct nft_set_ext *ext =
-					nft_set_elem_ext(te->set, te->elem_priv);
+			nft_trans_elems_add(&ctx, te);
 
-				if (te->update_flags & NFT_TRANS_UPD_TIMEOUT) {
-					WRITE_ONCE(nft_set_ext_timeout(ext)->timeout,
-						   te->timeout);
-				}
-				if (te->update_flags & NFT_TRANS_UPD_EXPIRATION) {
-					WRITE_ONCE(nft_set_ext_timeout(ext)->expiration,
-						   get_jiffies_64() + te->expiration);
-				}
-			} else {
-				nft_setelem_activate(net, te->set, te->elem_priv);
-			}
-
-			nf_tables_setelem_notify(&ctx, te->set,
-						 te->elem_priv,
-						 NFT_MSG_NEWSETELEM);
 			if (te->set->ops->commit &&
 			    list_empty(&te->set->pending_update)) {
 				list_add_tail(&te->set->pending_update,
@@ -10576,14 +10691,8 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
 		case NFT_MSG_DESTROYSETELEM:
 			te = nft_trans_container_elem(trans);
 
-			nf_tables_setelem_notify(&ctx, te->set,
-						 te->elem_priv,
-						 trans->msg_type);
-			nft_setelem_remove(net, te->set, te->elem_priv);
-			if (!nft_setelem_is_catchall(te->set, te->elem_priv)) {
-				atomic_dec(&te->set->nelems);
-				te->set->ndeact--;
-			}
+			nft_trans_elems_remove(&ctx, te);
+
 			if (te->set->ops->commit &&
 			    list_empty(&te->set->pending_update)) {
 				list_add_tail(&te->set->pending_update,
@@ -10703,8 +10812,7 @@ static void nf_tables_abort_release(struct nft_trans *trans)
 		nft_set_destroy(&ctx, nft_trans_set(trans));
 		break;
 	case NFT_MSG_NEWSETELEM:
-		nft_set_elem_destroy(nft_trans_elem_set(trans),
-				     nft_trans_elem_priv(trans), true);
+		nft_trans_set_elem_destroy(&ctx, nft_trans_container_elem(trans));
 		break;
 	case NFT_MSG_NEWOBJ:
 		nft_obj_destroy(&ctx, nft_trans_obj(trans));
@@ -10861,18 +10969,15 @@ static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
 			nft_trans_destroy(trans);
 			break;
 		case NFT_MSG_NEWSETELEM:
-			if (nft_trans_elem_update_flags(trans) ||
-			    nft_trans_elem_set_bound(trans)) {
+			if (nft_trans_elem_set_bound(trans)) {
 				nft_trans_destroy(trans);
 				break;
 			}
 			te = nft_trans_container_elem(trans);
-			if (!te->set->ops->abort ||
-			    nft_setelem_is_catchall(te->set, te->elem_priv))
-				nft_setelem_remove(net, te->set, te->elem_priv);
-
-			if (!nft_setelem_is_catchall(te->set, te->elem_priv))
-				atomic_dec(&te->set->nelems);
+			if (!nft_trans_elems_new_abort(&ctx, te)) {
+				nft_trans_destroy(trans);
+				break;
+			}
 
 			if (te->set->ops->abort &&
 			    list_empty(&te->set->pending_update)) {
@@ -10884,12 +10989,7 @@ static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
 		case NFT_MSG_DESTROYSETELEM:
 			te = nft_trans_container_elem(trans);
 
-			if (!nft_setelem_active_next(net, te->set, te->elem_priv)) {
-				nft_setelem_data_activate(net, te->set, te->elem_priv);
-				nft_setelem_activate(net, te->set, te->elem_priv);
-			}
-			if (!nft_setelem_is_catchall(te->set, te->elem_priv))
-				te->set->ndeact--;
+			nft_trans_elems_destroy_abort(&ctx, te);
 
 			if (te->set->ops->abort &&
 			    list_empty(&te->set->pending_update)) {
-- 
2.30.2

[PATCH net-next 05/14] netfilter: nf_tables: prepare nft audit for set element compaction

[Pablo Neira Ayuso]

From: Florian Westphal <fw@strlen.de>

nftables audit log format emits the number of added/deleted rules, sets,
set elements and so on, to userspace:

    table=t1 family=2 entries=4 op=nft_register_set
                      ~~~~~~~~~

At this time, the 'entries' key is the number of transactions that will
be applied.

The upcoming set element compression will coalesce subsequent
adds/deletes to the same set requests in the same transaction
request to conseve memory.

Without this patch, we'd under-report the number of altered elements.

Increment the audit counter by the number of elements to keep the reported
entries value the same.

Without this, nft_audit.sh selftest fails because the recorded
(expected) entries key is smaller than the expected one.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nf_tables_api.c | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 0882f78c2204..5b5178841553 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -10398,9 +10398,24 @@ static void nf_tables_commit_audit_free(struct list_head *adl)
 	}
 }
 
+/* nft audit emits the number of elements that get added/removed/updated,
+ * so NEW/DELSETELEM needs to increment based on the total elem count.
+ */
+static unsigned int nf_tables_commit_audit_entrycount(const struct nft_trans *trans)
+{
+	switch (trans->msg_type) {
+	case NFT_MSG_NEWSETELEM:
+	case NFT_MSG_DELSETELEM:
+		return nft_trans_container_elem(trans)->nelems;
+	}
+
+	return 1;
+}
+
 static void nf_tables_commit_audit_collect(struct list_head *adl,
-					   struct nft_table *table, u32 op)
+					   const struct nft_trans *trans, u32 op)
 {
+	const struct nft_table *table = trans->table;
 	struct nft_audit_data *adp;
 
 	list_for_each_entry(adp, adl, list) {
@@ -10410,7 +10425,7 @@ static void nf_tables_commit_audit_collect(struct list_head *adl,
 	WARN_ONCE(1, "table=%s not expected in commit list", table->name);
 	return;
 found:
-	adp->entries++;
+	adp->entries += nf_tables_commit_audit_entrycount(trans);
 	if (!adp->op || adp->op > op)
 		adp->op = op;
 }
@@ -10569,7 +10584,7 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
 
 		nft_ctx_update(&ctx, trans);
 
-		nf_tables_commit_audit_collect(&adl, table, trans->msg_type);
+		nf_tables_commit_audit_collect(&adl, trans, trans->msg_type);
 		switch (trans->msg_type) {
 		case NFT_MSG_NEWTABLE:
 			if (nft_trans_table_update(trans)) {
-- 
2.30.2

[PATCH net-next 06/14] netfilter: nf_tables: switch trans_elem to real flex array

[Pablo Neira Ayuso]

From: Florian Westphal <fw@strlen.de>

When queueing a set element add or removal operation to the transaction
log, check if the previous operation already asks for a the identical
operation on the same set.

If so, store the element reference in the preceding operation.
This significantlty reduces memory consumption when many set add/delete
operations appear in a single transaction.

Example: 10k elements require 937kb of memory (10k allocations from
kmalloc-96 slab).

Assuming we can compact 4 elements in the same set, 468 kbytes
are needed (64 bytes for base struct, nft_trans_elemn, 32 bytes
for nft_trans_one_elem structure, so 2500 allocations from kmalloc-192
slab).

For large batch updates we can compact up to 62 elements
into one single nft_trans_elem structure (~65% mem reduction):
(64 bytes for base struct, nft_trans_elem, 32 byte for nft_trans_one_elem
 struct).

We can halve size of nft_trans_one_elem struct by moving
timeout/expire/update_flags into a dynamically allocated structure,
this allows to store 124 elements in a 2k slab nft_trans_elem struct.
This is done in a followup patch.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nf_tables_api.c | 90 +++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 5b5178841553..679312d71bbe 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -26,6 +26,9 @@
 #define NFT_MODULE_AUTOLOAD_LIMIT (MODULE_NAME_LEN - sizeof("nft-expr-255-"))
 #define NFT_SET_MAX_ANONLEN 16
 
+/* limit compaction to avoid huge kmalloc/krealloc sizes. */
+#define NFT_MAX_SET_NELEMS ((2048 - sizeof(struct nft_trans_elem)) / sizeof(struct nft_trans_one_elem))
+
 unsigned int nf_tables_net_id __read_mostly;
 
 static LIST_HEAD(nf_tables_expressions);
@@ -391,6 +394,86 @@ static void nf_tables_unregister_hook(struct net *net,
 	return __nf_tables_unregister_hook(net, table, chain, false);
 }
 
+static bool nft_trans_collapse_set_elem_allowed(const struct nft_trans_elem *a, const struct nft_trans_elem *b)
+{
+	/* NB: the ->bound equality check is defensive, at this time we only merge
+	 * a new nft_trans_elem transaction request with the transaction tail
+	 * element, but a->bound != b->bound would imply a NEWRULE transaction
+	 * is queued in-between.
+	 *
+	 * The set check is mandatory, the NFT_MAX_SET_NELEMS check prevents
+	 * huge krealloc() requests.
+	 */
+	return a->set == b->set && a->bound == b->bound && a->nelems < NFT_MAX_SET_NELEMS;
+}
+
+static bool nft_trans_collapse_set_elem(struct nftables_pernet *nft_net,
+					struct nft_trans_elem *tail,
+					struct nft_trans_elem *trans,
+					gfp_t gfp)
+{
+	unsigned int nelems, old_nelems = tail->nelems;
+	struct nft_trans_elem *new_trans;
+
+	if (!nft_trans_collapse_set_elem_allowed(tail, trans))
+		return false;
+
+	/* "cannot happen", at this time userspace element add
+	 * requests always allocate a new transaction element.
+	 *
+	 * This serves as a reminder to adjust the list_add_tail
+	 * logic below in case this ever changes.
+	 */
+	if (WARN_ON_ONCE(trans->nelems != 1))
+		return false;
+
+	if (check_add_overflow(old_nelems, trans->nelems, &nelems))
+		return false;
+
+	/* krealloc might free tail which invalidates list pointers */
+	list_del_init(&tail->nft_trans.list);
+
+	new_trans = krealloc(tail, struct_size(tail, elems, nelems), gfp);
+	if (!new_trans) {
+		list_add_tail(&tail->nft_trans.list, &nft_net->commit_list);
+		return false;
+	}
+
+	/*
+	 * new_trans->nft_trans.list contains garbage, but
+	 * list_add_tail() doesn't care.
+	 */
+	new_trans->nelems = nelems;
+	new_trans->elems[old_nelems] = trans->elems[0];
+	list_add_tail(&new_trans->nft_trans.list, &nft_net->commit_list);
+
+	return true;
+}
+
+static bool nft_trans_try_collapse(struct nftables_pernet *nft_net,
+				   struct nft_trans *trans, gfp_t gfp)
+{
+	struct nft_trans *tail;
+
+	if (list_empty(&nft_net->commit_list))
+		return false;
+
+	tail = list_last_entry(&nft_net->commit_list, struct nft_trans, list);
+
+	if (tail->msg_type != trans->msg_type)
+		return false;
+
+	switch (trans->msg_type) {
+	case NFT_MSG_NEWSETELEM:
+	case NFT_MSG_DELSETELEM:
+		return nft_trans_collapse_set_elem(nft_net,
+						   nft_trans_container_elem(tail),
+						   nft_trans_container_elem(trans), gfp);
+	}
+
+	return false;
+}
+
 static void nft_trans_commit_list_add_tail(struct net *net, struct nft_trans *trans)
 {
 	struct nftables_pernet *nft_net = nft_pernet(net);
@@ -424,11 +507,18 @@ static void nft_trans_commit_list_add_tail(struct net *net, struct nft_trans *tr
 static void nft_trans_commit_list_add_elem(struct net *net, struct nft_trans *trans,
 					   gfp_t gfp)
 {
+	struct nftables_pernet *nft_net = nft_pernet(net);
+
 	WARN_ON_ONCE(trans->msg_type != NFT_MSG_NEWSETELEM &&
 		     trans->msg_type != NFT_MSG_DELSETELEM);
 
 	might_alloc(gfp);
 
+	if (nft_trans_try_collapse(nft_net, trans, gfp)) {
+		kfree(trans);
+		return;
+	}
+
 	nft_trans_commit_list_add_tail(net, trans);
 }
 
-- 
2.30.2

[PATCH net-next 07/14] netfilter: nf_tables: allocate element update information dynamically

[Pablo Neira Ayuso]

From: Florian Westphal <fw@strlen.de>

Move the timeout/expire/flag members from nft_trans_one_elem struct into
a dybamically allocated structure, only needed when timeout update was
requested.

This halves size of nft_trans_one_elem struct and allows to compact up to
124 elements in one transaction container rather than 62.

This halves memory requirements for a large flush or insert transaction,
where ->update remains NULL.

Care has to be taken to release the extra data in all spots, including
abort path.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 include/net/netfilter/nf_tables.h | 10 ++++--
 net/netfilter/nf_tables_api.c     | 57 +++++++++++++++++++------------
 2 files changed, 43 insertions(+), 24 deletions(-)

diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index 37af0b174c39..80a537ac26cd 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -1759,11 +1759,15 @@ enum nft_trans_elem_flags {
 	NFT_TRANS_UPD_EXPIRATION	= (1 << 1),
 };
 
-struct nft_trans_one_elem {
-	struct nft_elem_priv		*priv;
+struct nft_elem_update {
 	u64				timeout;
 	u64				expiration;
-	u8				update_flags;
+	u8				flags;
+};
+
+struct nft_trans_one_elem {
+	struct nft_elem_priv		*priv;
+	struct nft_elem_update		*update;
 };
 
 struct nft_trans_elem {
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 679312d71bbe..21b6f7410a1f 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -6706,7 +6706,8 @@ static void nft_trans_set_elem_destroy(const struct nft_ctx *ctx, struct nft_tra
 	int i;
 
 	for (i = 0; i < te->nelems; i++) {
-		if (te->elems[i].update_flags)
+		/* skip update request, see nft_trans_elems_new_abort() */
+		if (!te->elems[i].priv)
 			continue;
 
 		__nft_set_elem_destroy(ctx, te->set, te->elems[i].priv, true);
@@ -6897,12 +6898,13 @@ static void nft_trans_elem_update(const struct nft_set *set,
 				  const struct nft_trans_one_elem *elem)
 {
 	const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
+	const struct nft_elem_update *update = elem->update;
 
-	if (elem->update_flags & NFT_TRANS_UPD_TIMEOUT)
-		WRITE_ONCE(nft_set_ext_timeout(ext)->timeout, elem->timeout);
+	if (update->flags & NFT_TRANS_UPD_TIMEOUT)
+		WRITE_ONCE(nft_set_ext_timeout(ext)->timeout, update->timeout);
 
-	if (elem->update_flags & NFT_TRANS_UPD_EXPIRATION)
-		WRITE_ONCE(nft_set_ext_timeout(ext)->expiration, get_jiffies_64() + elem->expiration);
+	if (update->flags & NFT_TRANS_UPD_EXPIRATION)
+		WRITE_ONCE(nft_set_ext_timeout(ext)->expiration, get_jiffies_64() + update->expiration);
 }
 
 static void nft_trans_elems_add(const struct nft_ctx *ctx,
@@ -6911,15 +6913,16 @@ static void nft_trans_elems_add(const struct nft_ctx *ctx,
 	int i;
 
 	for (i = 0; i < te->nelems; i++) {
-		const struct nft_trans_one_elem *elem = &te->elems[i];
+		struct nft_trans_one_elem *elem = &te->elems[i];
 
-		if (elem->update_flags)
+		if (elem->update)
 			nft_trans_elem_update(te->set, elem);
 		else
 			nft_setelem_activate(ctx->net, te->set, elem->priv);
 
 		nf_tables_setelem_notify(ctx, te->set, elem->priv,
 					 NFT_MSG_NEWSETELEM);
+		kfree(elem->update);
 	}
 }
 
@@ -7011,6 +7014,8 @@ static void nft_trans_elems_remove(const struct nft_ctx *ctx,
 	int i;
 
 	for (i = 0; i < te->nelems; i++) {
+		WARN_ON_ONCE(te->elems[i].update);
+
 		nf_tables_setelem_notify(ctx, te->set,
 					 te->elems[i].priv,
 					 te->nft_trans.msg_type);
@@ -7059,7 +7064,6 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
 	struct nft_data_desc desc;
 	enum nft_registers dreg;
 	struct nft_trans *trans;
-	u8 update_flags;
 	u64 expiration;
 	u64 timeout;
 	int err, i;
@@ -7374,26 +7378,32 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
 			else if (!(nlmsg_flags & NLM_F_EXCL)) {
 				err = 0;
 				if (nft_set_ext_exists(ext2, NFT_SET_EXT_TIMEOUT)) {
-					struct nft_trans_one_elem *update;
-
-					update = &nft_trans_container_elem(trans)->elems[0];
+					struct nft_elem_update update = { };
 
-					update_flags = 0;
 					if (timeout != nft_set_ext_timeout(ext2)->timeout) {
-						update->timeout = timeout;
+						update.timeout = timeout;
 						if (expiration == 0)
 							expiration = timeout;
 
-						update_flags |= NFT_TRANS_UPD_TIMEOUT;
+						update.flags |= NFT_TRANS_UPD_TIMEOUT;
 					}
 					if (expiration) {
-						update->expiration = expiration;
-						update_flags |= NFT_TRANS_UPD_EXPIRATION;
+						update.expiration = expiration;
+						update.flags |= NFT_TRANS_UPD_EXPIRATION;
 					}
 
-					if (update_flags) {
-						update->priv = elem_priv;
-						update->update_flags = update_flags;
+					if (update.flags) {
+						struct nft_trans_one_elem *ue;
+
+						ue = &nft_trans_container_elem(trans)->elems[0];
+
+						ue->update = kmemdup(&update, sizeof(update), GFP_KERNEL);
+						if (!ue->update) {
+							err = -ENOMEM;
+							goto err_element_clash;
+						}
+
+						ue->priv = elem_priv;
 						nft_trans_commit_list_add_elem(ctx->net, trans, GFP_KERNEL);
 						goto err_elem_free;
 					}
@@ -7561,14 +7571,19 @@ void nft_setelem_data_deactivate(const struct net *net,
  * Returns true if set had been added to (i.e., elements need to be removed again).
  */
 static bool nft_trans_elems_new_abort(const struct nft_ctx *ctx,
-				      const struct nft_trans_elem *te)
+				      struct nft_trans_elem *te)
 {
 	bool removed = false;
 	int i;
 
 	for (i = 0; i < te->nelems; i++) {
-		if (te->elems[i].update_flags)
+		if (te->elems[i].update) {
+			kfree(te->elems[i].update);
+			te->elems[i].update = NULL;
+			/* Update request, so do not release this element */
+			te->elems[i].priv = NULL;
 			continue;
+		}
 
 		if (!te->set->ops->abort || nft_setelem_is_catchall(te->set, te->elems[i].priv))
 			nft_setelem_remove(ctx->net, te->set, te->elems[i].priv);
-- 
2.30.2

[PATCH net-next 08/14] netfilter: ipv4: Convert ip_route_me_harder() to dscp_t.

[Pablo Neira Ayuso]

From: Guillaume Nault <gnault@redhat.com>

Use ip4h_dscp()instead of reading iph->tos directly.

ip4h_dscp() returns a dscp_t value which is temporarily converted back
to __u8 with inet_dscp_to_dsfield(). When converting ->flowi4_tos to
dscp_t in the future, we'll only have to remove that
inet_dscp_to_dsfield() call.

Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/ipv4/netfilter.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c
index e0aab66cd925..08bc3f2c0078 100644
--- a/net/ipv4/netfilter.c
+++ b/net/ipv4/netfilter.c
@@ -44,7 +44,7 @@ int ip_route_me_harder(struct net *net, struct sock *sk, struct sk_buff *skb, un
 	 */
 	fl4.daddr = iph->daddr;
 	fl4.saddr = saddr;
-	fl4.flowi4_tos = iph->tos & INET_DSCP_MASK;
+	fl4.flowi4_tos = inet_dscp_to_dsfield(ip4h_dscp(iph));
 	fl4.flowi4_oif = sk ? sk->sk_bound_dev_if : 0;
 	fl4.flowi4_l3mdev = l3mdev_master_ifindex(dev);
 	fl4.flowi4_mark = skb->mark;
-- 
2.30.2

[PATCH net-next 09/14] netfilter: flow_offload: Convert nft_flow_route() to dscp_t.

[Pablo Neira Ayuso]

From: Guillaume Nault <gnault@redhat.com>

Use ip4h_dscp()instead of reading ip_hdr()->tos directly.

ip4h_dscp() returns a dscp_t value which is temporarily converted back
to __u8 with inet_dscp_to_dsfield(). When converting ->flowi4_tos to
dscp_t in the future, we'll only have to remove that
inet_dscp_to_dsfield() call.

Also, remove the comment about the net/ip.h include file, since it's
now required for the ip4h_dscp() helper too.

Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nft_flow_offload.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/netfilter/nft_flow_offload.c b/net/netfilter/nft_flow_offload.c
index 65199c23c75c..3b474d235663 100644
--- a/net/netfilter/nft_flow_offload.c
+++ b/net/netfilter/nft_flow_offload.c
@@ -8,7 +8,7 @@
 #include <linux/spinlock.h>
 #include <linux/netfilter/nf_conntrack_common.h>
 #include <linux/netfilter/nf_tables.h>
-#include <net/ip.h> /* for ipv4 options. */
+#include <net/ip.h>
 #include <net/inet_dscp.h>
 #include <net/netfilter/nf_tables.h>
 #include <net/netfilter/nf_tables_core.h>
@@ -236,7 +236,7 @@ static int nft_flow_route(const struct nft_pktinfo *pkt,
 		fl.u.ip4.saddr = ct->tuplehash[!dir].tuple.src.u3.ip;
 		fl.u.ip4.flowi4_oif = nft_in(pkt)->ifindex;
 		fl.u.ip4.flowi4_iif = this_dst->dev->ifindex;
-		fl.u.ip4.flowi4_tos = ip_hdr(pkt->skb)->tos & INET_DSCP_MASK;
+		fl.u.ip4.flowi4_tos = inet_dscp_to_dsfield(ip4h_dscp(ip_hdr(pkt->skb)));
 		fl.u.ip4.flowi4_mark = pkt->skb->mark;
 		fl.u.ip4.flowi4_flags = FLOWI_FLAG_ANYSRC;
 		break;
-- 
2.30.2

[PATCH net-next 10/14] netfilter: rpfilter: Convert rpfilter_mt() to dscp_t.

[Pablo Neira Ayuso]

From: Guillaume Nault <gnault@redhat.com>

Use ip4h_dscp() instead of reading iph->tos directly.

ip4h_dscp() returns a dscp_t value which is temporarily converted back
to __u8 with inet_dscp_to_dsfield(). When converting ->flowi4_tos to
dscp_t in the future, we'll only have to remove that
inet_dscp_to_dsfield() call.

Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/ipv4/netfilter/ipt_rpfilter.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/netfilter/ipt_rpfilter.c b/net/ipv4/netfilter/ipt_rpfilter.c
index 1ce7a1655b97..a27782d7653e 100644
--- a/net/ipv4/netfilter/ipt_rpfilter.c
+++ b/net/ipv4/netfilter/ipt_rpfilter.c
@@ -76,7 +76,7 @@ static bool rpfilter_mt(const struct sk_buff *skb, struct xt_action_param *par)
 	flow.daddr = iph->saddr;
 	flow.saddr = rpfilter_get_saddr(iph->daddr);
 	flow.flowi4_mark = info->flags & XT_RPFILTER_VALID_MARK ? skb->mark : 0;
-	flow.flowi4_tos = iph->tos & INET_DSCP_MASK;
+	flow.flowi4_tos = inet_dscp_to_dsfield(ip4h_dscp(iph));
 	flow.flowi4_scope = RT_SCOPE_UNIVERSE;
 	flow.flowi4_l3mdev = l3mdev_master_ifindex_rcu(xt_in(par));
 	flow.flowi4_uid = sock_net_uid(xt_net(par), NULL);
-- 
2.30.2

[PATCH net-next 11/14] netfilter: nft_fib: Convert nft_fib4_eval() to dscp_t.

[Pablo Neira Ayuso]

From: Guillaume Nault <gnault@redhat.com>

Use ip4h_dscp() instead of reading iph->tos directly.

ip4h_dscp() returns a dscp_t value which is temporarily converted back
to __u8 with inet_dscp_to_dsfield(). When converting ->flowi4_tos to
dscp_t in the future, we'll only have to remove that
inet_dscp_to_dsfield() call.

Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/ipv4/netfilter/nft_fib_ipv4.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/netfilter/nft_fib_ipv4.c b/net/ipv4/netfilter/nft_fib_ipv4.c
index 09fff5d424ef..625adbc42037 100644
--- a/net/ipv4/netfilter/nft_fib_ipv4.c
+++ b/net/ipv4/netfilter/nft_fib_ipv4.c
@@ -11,6 +11,7 @@
 #include <net/netfilter/nft_fib.h>
 
 #include <net/inet_dscp.h>
+#include <net/ip.h>
 #include <net/ip_fib.h>
 #include <net/route.h>
 
@@ -107,7 +108,7 @@ void nft_fib4_eval(const struct nft_expr *expr, struct nft_regs *regs,
 	if (priv->flags & NFTA_FIB_F_MARK)
 		fl4.flowi4_mark = pkt->skb->mark;
 
-	fl4.flowi4_tos = iph->tos & INET_DSCP_MASK;
+	fl4.flowi4_tos = inet_dscp_to_dsfield(ip4h_dscp(iph));
 
 	if (priv->flags & NFTA_FIB_F_DADDR) {
 		fl4.daddr = iph->daddr;
-- 
2.30.2

[PATCH net-next 12/14] netfilter: nf_dup4: Convert nf_dup_ipv4_route() to dscp_t.

[Pablo Neira Ayuso]

From: Guillaume Nault <gnault@redhat.com>

Use ip4h_dscp() instead of reading iph->tos directly.

ip4h_dscp() returns a dscp_t value which is temporarily converted back
to __u8 with inet_dscp_to_dsfield(). When converting ->flowi4_tos to
dscp_t in the future, we'll only have to remove that
inet_dscp_to_dsfield() call.

Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/ipv4/netfilter/nf_dup_ipv4.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/netfilter/nf_dup_ipv4.c b/net/ipv4/netfilter/nf_dup_ipv4.c
index ec94ee1051c7..25e1e8eb18dd 100644
--- a/net/ipv4/netfilter/nf_dup_ipv4.c
+++ b/net/ipv4/netfilter/nf_dup_ipv4.c
@@ -33,7 +33,7 @@ static bool nf_dup_ipv4_route(struct net *net, struct sk_buff *skb,
 		fl4.flowi4_oif = oif;
 
 	fl4.daddr = gw->s_addr;
-	fl4.flowi4_tos = iph->tos & INET_DSCP_MASK;
+	fl4.flowi4_tos = inet_dscp_to_dsfield(ip4h_dscp(iph));
 	fl4.flowi4_scope = RT_SCOPE_UNIVERSE;
 	fl4.flowi4_flags = FLOWI_FLAG_KNOWN_NH;
 	rt = ip_route_output_key(net, &fl4);
-- 
2.30.2

[PATCH net-next 13/14] netfilter: bitwise: rename some boolean operation functions

[Pablo Neira Ayuso]

From: Jeremy Sowden <jeremy@azazel.net>

In the next patch we add support for doing AND, OR and XOR operations
directly in the kernel, so rename some functions and an enum constant
related to mask-and-xor boolean operations.

Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 include/uapi/linux/netfilter/nf_tables.h | 10 ++++---
 net/netfilter/nft_bitwise.c              | 34 ++++++++++++------------
 2 files changed, 24 insertions(+), 20 deletions(-)

diff --git a/include/uapi/linux/netfilter/nf_tables.h b/include/uapi/linux/netfilter/nf_tables.h
index 9e9079321380..487542234ccd 100644
--- a/include/uapi/linux/netfilter/nf_tables.h
+++ b/include/uapi/linux/netfilter/nf_tables.h
@@ -564,16 +564,20 @@ enum nft_immediate_attributes {
 /**
  * enum nft_bitwise_ops - nf_tables bitwise operations
  *
- * @NFT_BITWISE_BOOL: mask-and-xor operation used to implement NOT, AND, OR and
- *                    XOR boolean operations
+ * @NFT_BITWISE_MASK_XOR: mask-and-xor operation used to implement NOT, AND, OR
+ *                        and XOR boolean operations
  * @NFT_BITWISE_LSHIFT: left-shift operation
  * @NFT_BITWISE_RSHIFT: right-shift operation
  */
 enum nft_bitwise_ops {
-	NFT_BITWISE_BOOL,
+	NFT_BITWISE_MASK_XOR,
 	NFT_BITWISE_LSHIFT,
 	NFT_BITWISE_RSHIFT,
 };
+/*
+ * Old name for NFT_BITWISE_MASK_XOR.  Retained for backwards-compatibility.
+ */
+#define NFT_BITWISE_BOOL NFT_BITWISE_MASK_XOR
 
 /**
  * enum nft_bitwise_attributes - nf_tables bitwise expression netlink attributes
diff --git a/net/netfilter/nft_bitwise.c b/net/netfilter/nft_bitwise.c
index 7de95674fd8c..7f6a4f800537 100644
--- a/net/netfilter/nft_bitwise.c
+++ b/net/netfilter/nft_bitwise.c
@@ -25,8 +25,8 @@ struct nft_bitwise {
 	struct nft_data		data;
 };
 
-static void nft_bitwise_eval_bool(u32 *dst, const u32 *src,
-				  const struct nft_bitwise *priv)
+static void nft_bitwise_eval_mask_xor(u32 *dst, const u32 *src,
+				      const struct nft_bitwise *priv)
 {
 	unsigned int i;
 
@@ -68,8 +68,8 @@ void nft_bitwise_eval(const struct nft_expr *expr,
 	u32 *dst = &regs->data[priv->dreg];
 
 	switch (priv->op) {
-	case NFT_BITWISE_BOOL:
-		nft_bitwise_eval_bool(dst, src, priv);
+	case NFT_BITWISE_MASK_XOR:
+		nft_bitwise_eval_mask_xor(dst, src, priv);
 		break;
 	case NFT_BITWISE_LSHIFT:
 		nft_bitwise_eval_lshift(dst, src, priv);
@@ -90,8 +90,8 @@ static const struct nla_policy nft_bitwise_policy[NFTA_BITWISE_MAX + 1] = {
 	[NFTA_BITWISE_DATA]	= { .type = NLA_NESTED },
 };
 
-static int nft_bitwise_init_bool(struct nft_bitwise *priv,
-				 const struct nlattr *const tb[])
+static int nft_bitwise_init_mask_xor(struct nft_bitwise *priv,
+				     const struct nlattr *const tb[])
 {
 	struct nft_data_desc mask = {
 		.type	= NFT_DATA_VALUE,
@@ -185,7 +185,7 @@ static int nft_bitwise_init(const struct nft_ctx *ctx,
 	if (tb[NFTA_BITWISE_OP]) {
 		priv->op = ntohl(nla_get_be32(tb[NFTA_BITWISE_OP]));
 		switch (priv->op) {
-		case NFT_BITWISE_BOOL:
+		case NFT_BITWISE_MASK_XOR:
 		case NFT_BITWISE_LSHIFT:
 		case NFT_BITWISE_RSHIFT:
 			break;
@@ -193,12 +193,12 @@ static int nft_bitwise_init(const struct nft_ctx *ctx,
 			return -EOPNOTSUPP;
 		}
 	} else {
-		priv->op = NFT_BITWISE_BOOL;
+		priv->op = NFT_BITWISE_MASK_XOR;
 	}
 
 	switch(priv->op) {
-	case NFT_BITWISE_BOOL:
-		err = nft_bitwise_init_bool(priv, tb);
+	case NFT_BITWISE_MASK_XOR:
+		err = nft_bitwise_init_mask_xor(priv, tb);
 		break;
 	case NFT_BITWISE_LSHIFT:
 	case NFT_BITWISE_RSHIFT:
@@ -209,8 +209,8 @@ static int nft_bitwise_init(const struct nft_ctx *ctx,
 	return err;
 }
 
-static int nft_bitwise_dump_bool(struct sk_buff *skb,
-				 const struct nft_bitwise *priv)
+static int nft_bitwise_dump_mask_xor(struct sk_buff *skb,
+				     const struct nft_bitwise *priv)
 {
 	if (nft_data_dump(skb, NFTA_BITWISE_MASK, &priv->mask,
 			  NFT_DATA_VALUE, priv->len) < 0)
@@ -248,8 +248,8 @@ static int nft_bitwise_dump(struct sk_buff *skb,
 		return -1;
 
 	switch (priv->op) {
-	case NFT_BITWISE_BOOL:
-		err = nft_bitwise_dump_bool(skb, priv);
+	case NFT_BITWISE_MASK_XOR:
+		err = nft_bitwise_dump_mask_xor(skb, priv);
 		break;
 	case NFT_BITWISE_LSHIFT:
 	case NFT_BITWISE_RSHIFT:
@@ -269,7 +269,7 @@ static int nft_bitwise_offload(struct nft_offload_ctx *ctx,
 	const struct nft_bitwise *priv = nft_expr_priv(expr);
 	struct nft_offload_reg *reg = &ctx->regs[priv->dreg];
 
-	if (priv->op != NFT_BITWISE_BOOL)
+	if (priv->op != NFT_BITWISE_MASK_XOR)
 		return -EOPNOTSUPP;
 
 	if (memcmp(&priv->xor, &zero, sizeof(priv->xor)) ||
@@ -406,7 +406,7 @@ nft_bitwise_fast_dump(struct sk_buff *skb,
 		return -1;
 	if (nla_put_be32(skb, NFTA_BITWISE_LEN, htonl(sizeof(u32))))
 		return -1;
-	if (nla_put_be32(skb, NFTA_BITWISE_OP, htonl(NFT_BITWISE_BOOL)))
+	if (nla_put_be32(skb, NFTA_BITWISE_OP, htonl(NFT_BITWISE_MASK_XOR)))
 		return -1;
 
 	data.data[0] = priv->mask;
@@ -501,7 +501,7 @@ nft_bitwise_select_ops(const struct nft_ctx *ctx,
 		return &nft_bitwise_ops;
 
 	if (tb[NFTA_BITWISE_OP] &&
-	    ntohl(nla_get_be32(tb[NFTA_BITWISE_OP])) != NFT_BITWISE_BOOL)
+	    ntohl(nla_get_be32(tb[NFTA_BITWISE_OP])) != NFT_BITWISE_MASK_XOR)
 		return &nft_bitwise_ops;
 
 	return &nft_bitwise_fast_ops;
-- 
2.30.2

[PATCH net-next 14/14] netfilter: bitwise: add support for doing AND, OR and XOR directly

[Pablo Neira Ayuso]

From: Jeremy Sowden <jeremy@azazel.net>

Hitherto, these operations have been converted in user space to
mask-and-xor operations on one register and two immediate values, and it
is the latter which have been evaluated by the kernel.  We add support
for evaluating these operations directly in kernel space on one register
and either an immediate value or a second register.

Pablo made a few changes to the original patch:

- EINVAL if NFTA_BITWISE_SREG2 is used with fast version.
- Allow _AND,_OR,_XOR with _DATA != sizeof(u32)
- Dump _SREG2 or _DATA with _AND,_OR,_XOR

Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 include/uapi/linux/netfilter/nf_tables.h |   8 ++
 net/netfilter/nft_bitwise.c              | 134 +++++++++++++++++++++--
 2 files changed, 131 insertions(+), 11 deletions(-)

diff --git a/include/uapi/linux/netfilter/nf_tables.h b/include/uapi/linux/netfilter/nf_tables.h
index 487542234ccd..49c944e78463 100644
--- a/include/uapi/linux/netfilter/nf_tables.h
+++ b/include/uapi/linux/netfilter/nf_tables.h
@@ -568,11 +568,17 @@ enum nft_immediate_attributes {
  *                        and XOR boolean operations
  * @NFT_BITWISE_LSHIFT: left-shift operation
  * @NFT_BITWISE_RSHIFT: right-shift operation
+ * @NFT_BITWISE_AND: and operation
+ * @NFT_BITWISE_OR: or operation
+ * @NFT_BITWISE_XOR: xor operation
  */
 enum nft_bitwise_ops {
 	NFT_BITWISE_MASK_XOR,
 	NFT_BITWISE_LSHIFT,
 	NFT_BITWISE_RSHIFT,
+	NFT_BITWISE_AND,
+	NFT_BITWISE_OR,
+	NFT_BITWISE_XOR,
 };
 /*
  * Old name for NFT_BITWISE_MASK_XOR.  Retained for backwards-compatibility.
@@ -590,6 +596,7 @@ enum nft_bitwise_ops {
  * @NFTA_BITWISE_OP: type of operation (NLA_U32: nft_bitwise_ops)
  * @NFTA_BITWISE_DATA: argument for non-boolean operations
  *                     (NLA_NESTED: nft_data_attributes)
+ * @NFTA_BITWISE_SREG2: second source register (NLA_U32: nft_registers)
  *
  * The bitwise expression supports boolean and shift operations.  It implements
  * the boolean operations by performing the following operation:
@@ -613,6 +620,7 @@ enum nft_bitwise_attributes {
 	NFTA_BITWISE_XOR,
 	NFTA_BITWISE_OP,
 	NFTA_BITWISE_DATA,
+	NFTA_BITWISE_SREG2,
 	__NFTA_BITWISE_MAX
 };
 #define NFTA_BITWISE_MAX	(__NFTA_BITWISE_MAX - 1)
diff --git a/net/netfilter/nft_bitwise.c b/net/netfilter/nft_bitwise.c
index 7f6a4f800537..d550910aabec 100644
--- a/net/netfilter/nft_bitwise.c
+++ b/net/netfilter/nft_bitwise.c
@@ -17,6 +17,7 @@
 
 struct nft_bitwise {
 	u8			sreg;
+	u8			sreg2;
 	u8			dreg;
 	enum nft_bitwise_ops	op:8;
 	u8			len;
@@ -60,28 +61,72 @@ static void nft_bitwise_eval_rshift(u32 *dst, const u32 *src,
 	}
 }
 
+static void nft_bitwise_eval_and(u32 *dst, const u32 *src, const u32 *src2,
+				 const struct nft_bitwise *priv)
+{
+	unsigned int i, n;
+
+	for (i = 0, n = DIV_ROUND_UP(priv->len, sizeof(u32)); i < n; i++)
+		dst[i] = src[i] & src2[i];
+}
+
+static void nft_bitwise_eval_or(u32 *dst, const u32 *src, const u32 *src2,
+				const struct nft_bitwise *priv)
+{
+	unsigned int i, n;
+
+	for (i = 0, n = DIV_ROUND_UP(priv->len, sizeof(u32)); i < n; i++)
+		dst[i] = src[i] | src2[i];
+}
+
+static void nft_bitwise_eval_xor(u32 *dst, const u32 *src, const u32 *src2,
+				 const struct nft_bitwise *priv)
+{
+	unsigned int i, n;
+
+	for (i = 0, n = DIV_ROUND_UP(priv->len, sizeof(u32)); i < n; i++)
+		dst[i] = src[i] ^ src2[i];
+}
+
 void nft_bitwise_eval(const struct nft_expr *expr,
 		      struct nft_regs *regs, const struct nft_pktinfo *pkt)
 {
 	const struct nft_bitwise *priv = nft_expr_priv(expr);
-	const u32 *src = &regs->data[priv->sreg];
+	const u32 *src = &regs->data[priv->sreg], *src2;
 	u32 *dst = &regs->data[priv->dreg];
 
-	switch (priv->op) {
-	case NFT_BITWISE_MASK_XOR:
+	if (priv->op == NFT_BITWISE_MASK_XOR) {
 		nft_bitwise_eval_mask_xor(dst, src, priv);
-		break;
-	case NFT_BITWISE_LSHIFT:
+		return;
+	}
+	if (priv->op == NFT_BITWISE_LSHIFT) {
 		nft_bitwise_eval_lshift(dst, src, priv);
-		break;
-	case NFT_BITWISE_RSHIFT:
+		return;
+	}
+	if (priv->op == NFT_BITWISE_RSHIFT) {
 		nft_bitwise_eval_rshift(dst, src, priv);
-		break;
+		return;
+	}
+
+	src2 = priv->sreg2 ? &regs->data[priv->sreg2] : priv->data.data;
+
+	if (priv->op == NFT_BITWISE_AND) {
+		nft_bitwise_eval_and(dst, src, src2, priv);
+		return;
+	}
+	if (priv->op == NFT_BITWISE_OR) {
+		nft_bitwise_eval_or(dst, src, src2, priv);
+		return;
+	}
+	if (priv->op == NFT_BITWISE_XOR) {
+		nft_bitwise_eval_xor(dst, src, src2, priv);
+		return;
 	}
 }
 
 static const struct nla_policy nft_bitwise_policy[NFTA_BITWISE_MAX + 1] = {
 	[NFTA_BITWISE_SREG]	= { .type = NLA_U32 },
+	[NFTA_BITWISE_SREG2]	= { .type = NLA_U32 },
 	[NFTA_BITWISE_DREG]	= { .type = NLA_U32 },
 	[NFTA_BITWISE_LEN]	= { .type = NLA_U32 },
 	[NFTA_BITWISE_MASK]	= { .type = NLA_NESTED },
@@ -105,7 +150,8 @@ static int nft_bitwise_init_mask_xor(struct nft_bitwise *priv,
 	};
 	int err;
 
-	if (tb[NFTA_BITWISE_DATA])
+	if (tb[NFTA_BITWISE_DATA] ||
+	    tb[NFTA_BITWISE_SREG2])
 		return -EINVAL;
 
 	if (!tb[NFTA_BITWISE_MASK] ||
@@ -139,7 +185,8 @@ static int nft_bitwise_init_shift(struct nft_bitwise *priv,
 	int err;
 
 	if (tb[NFTA_BITWISE_MASK] ||
-	    tb[NFTA_BITWISE_XOR])
+	    tb[NFTA_BITWISE_XOR]  ||
+	    tb[NFTA_BITWISE_SREG2])
 		return -EINVAL;
 
 	if (!tb[NFTA_BITWISE_DATA])
@@ -157,6 +204,41 @@ static int nft_bitwise_init_shift(struct nft_bitwise *priv,
 	return 0;
 }
 
+static int nft_bitwise_init_bool(const struct nft_ctx *ctx,
+				 struct nft_bitwise *priv,
+				 const struct nlattr *const tb[])
+{
+	int err;
+
+	if (tb[NFTA_BITWISE_MASK] ||
+	    tb[NFTA_BITWISE_XOR])
+		return -EINVAL;
+
+	if ((!tb[NFTA_BITWISE_DATA] && !tb[NFTA_BITWISE_SREG2]) ||
+	    (tb[NFTA_BITWISE_DATA] && tb[NFTA_BITWISE_SREG2]))
+		return -EINVAL;
+
+	if (tb[NFTA_BITWISE_DATA]) {
+		struct nft_data_desc desc = {
+			.type	= NFT_DATA_VALUE,
+			.size	= sizeof(priv->data),
+			.len	= priv->len,
+		};
+
+		err = nft_data_init(NULL, &priv->data, &desc,
+				    tb[NFTA_BITWISE_DATA]);
+		if (err < 0)
+			return err;
+	} else {
+		err = nft_parse_register_load(ctx, tb[NFTA_BITWISE_SREG2],
+					      &priv->sreg2, priv->len);
+		if (err < 0)
+			return err;
+	}
+
+	return 0;
+}
+
 static int nft_bitwise_init(const struct nft_ctx *ctx,
 			    const struct nft_expr *expr,
 			    const struct nlattr * const tb[])
@@ -188,6 +270,9 @@ static int nft_bitwise_init(const struct nft_ctx *ctx,
 		case NFT_BITWISE_MASK_XOR:
 		case NFT_BITWISE_LSHIFT:
 		case NFT_BITWISE_RSHIFT:
+		case NFT_BITWISE_AND:
+		case NFT_BITWISE_OR:
+		case NFT_BITWISE_XOR:
 			break;
 		default:
 			return -EOPNOTSUPP;
@@ -204,6 +289,11 @@ static int nft_bitwise_init(const struct nft_ctx *ctx,
 	case NFT_BITWISE_RSHIFT:
 		err = nft_bitwise_init_shift(priv, tb);
 		break;
+	case NFT_BITWISE_AND:
+	case NFT_BITWISE_OR:
+	case NFT_BITWISE_XOR:
+		err = nft_bitwise_init_bool(ctx, priv, tb);
+		break;
 	}
 
 	return err;
@@ -232,6 +322,21 @@ static int nft_bitwise_dump_shift(struct sk_buff *skb,
 	return 0;
 }
 
+static int nft_bitwise_dump_bool(struct sk_buff *skb,
+				 const struct nft_bitwise *priv)
+{
+	if (priv->sreg2) {
+		if (nft_dump_register(skb, NFTA_BITWISE_SREG2, priv->sreg2))
+			return -1;
+	} else {
+		if (nft_data_dump(skb, NFTA_BITWISE_DATA, &priv->data,
+				  NFT_DATA_VALUE, sizeof(u32)) < 0)
+			return -1;
+	}
+
+	return 0;
+}
+
 static int nft_bitwise_dump(struct sk_buff *skb,
 			    const struct nft_expr *expr, bool reset)
 {
@@ -255,6 +360,11 @@ static int nft_bitwise_dump(struct sk_buff *skb,
 	case NFT_BITWISE_RSHIFT:
 		err = nft_bitwise_dump_shift(skb, priv);
 		break;
+	case NFT_BITWISE_AND:
+	case NFT_BITWISE_OR:
+	case NFT_BITWISE_XOR:
+		err = nft_bitwise_dump_bool(skb, priv);
+		break;
 	}
 
 	return err;
@@ -299,6 +409,7 @@ static bool nft_bitwise_reduce(struct nft_regs_track *track,
 	    track->regs[priv->dreg].bitwise &&
 	    track->regs[priv->dreg].bitwise->ops == expr->ops &&
 	    priv->sreg == bitwise->sreg &&
+	    priv->sreg2 == bitwise->sreg2 &&
 	    priv->dreg == bitwise->dreg &&
 	    priv->op == bitwise->op &&
 	    priv->len == bitwise->len &&
@@ -375,7 +486,8 @@ static int nft_bitwise_fast_init(const struct nft_ctx *ctx,
 	if (err < 0)
 		return err;
 
-	if (tb[NFTA_BITWISE_DATA])
+	if (tb[NFTA_BITWISE_DATA] ||
+	    tb[NFTA_BITWISE_SREG2])
 		return -EINVAL;
 
 	if (!tb[NFTA_BITWISE_MASK] ||
-- 
2.30.2

Re: [PATCH net-next 01/14] netfilter: nfnetlink: Report extack policy errors for batched ops

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (main)
by Pablo Neira Ayuso <pablo@netfilter.org>:

On Fri, 15 Nov 2024 14:31:54 +0100 you wrote:
> From: Donald Hunter <donald.hunter@gmail.com>
> 
> The nftables batch processing does not currently populate extack with
> policy errors. Fix this by passing extack when parsing batch messages.
> 
> Signed-off-by: Donald Hunter <donald.hunter@gmail.com>
> Reviewed-by: Simon Horman <horms@kernel.org>
> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
> 
> [...]

Here is the summary with links:
  - [net-next,01/14] netfilter: nfnetlink: Report extack policy errors for batched ops
    https://git.kernel.org/netdev/net-next/c/3f5495962824
  - [net-next,02/14] netfilter: bpf: Pass string literal as format argument of request_module()
    https://git.kernel.org/netdev/net-next/c/8340b0056ac7
  - [net-next,03/14] netfilter: nf_tables: add nft_trans_commit_list_add_elem helper
    https://git.kernel.org/netdev/net-next/c/4ee29181216d
  - [net-next,04/14] netfilter: nf_tables: prepare for multiple elements in nft_trans_elem structure
    https://git.kernel.org/netdev/net-next/c/a8ee6b900c14
  - [net-next,05/14] netfilter: nf_tables: prepare nft audit for set element compaction
    https://git.kernel.org/netdev/net-next/c/466c9b3b2a92
  - [net-next,06/14] netfilter: nf_tables: switch trans_elem to real flex array
    https://git.kernel.org/netdev/net-next/c/b0c49466043a
  - [net-next,07/14] netfilter: nf_tables: allocate element update information dynamically
    https://git.kernel.org/netdev/net-next/c/508180850b73
  - [net-next,08/14] netfilter: ipv4: Convert ip_route_me_harder() to dscp_t.
    https://git.kernel.org/netdev/net-next/c/0608746f95b2
  - [net-next,09/14] netfilter: flow_offload: Convert nft_flow_route() to dscp_t.
    https://git.kernel.org/netdev/net-next/c/6f9615a6e686
  - [net-next,10/14] netfilter: rpfilter: Convert rpfilter_mt() to dscp_t.
    https://git.kernel.org/netdev/net-next/c/f694ce6de589
  - [net-next,11/14] netfilter: nft_fib: Convert nft_fib4_eval() to dscp_t.
    https://git.kernel.org/netdev/net-next/c/f12b67cc7d1b
  - [net-next,12/14] netfilter: nf_dup4: Convert nf_dup_ipv4_route() to dscp_t.
    https://git.kernel.org/netdev/net-next/c/f0d839c13ed5
  - [net-next,13/14] netfilter: bitwise: rename some boolean operation functions
    https://git.kernel.org/netdev/net-next/c/a12143e6084c
  - [net-next,14/14] netfilter: bitwise: add support for doing AND, OR and XOR directly
    https://git.kernel.org/netdev/net-next/c/b0ccf4f53d96

You are awesome, thank you!
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