Merge tag 'nf-next-24-06-28' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next into main

Pablo Neira Ayuso says:

====================
Netfilter/IPVS updates for net-next

The following patchset contains Netfilter/IPVS updates for net-next:

Patch #1 to #11 to shrink memory consumption for transaction objects:

  struct nft_trans_chain { /* size: 120 (-32), cachelines: 2, members: 10 */
  struct nft_trans_elem { /* size: 72 (-40), cachelines: 2, members: 4 */
  struct nft_trans_flowtable { /* size: 80 (-48), cachelines: 2, members: 5 */
  struct nft_trans_obj { /* size: 72 (-40), cachelines: 2, members: 4 */
  struct nft_trans_rule { /* size: 80 (-32), cachelines: 2, members: 6 */
  struct nft_trans_set { /* size: 96 (-24), cachelines: 2, members: 8 */
  struct nft_trans_table { /* size: 56 (-40), cachelines: 1, members: 2 */

  struct nft_trans_elem can now be allocated from kmalloc-96 instead of
  kmalloc-128 slab.

  Series from Florian Westphal. For the record, I have mangled patch #1
  to add nft_trans_container_*() and use if for every transaction object.
   I have also added BUILD_BUG_ON to ensure struct nft_trans always comes
  at the beginning of the container transaction object. And few minor
  cleanups, any new bugs are of my own.

Patch #12 simplify check for SCTP GSO in IPVS, from Ismael Luceno.

Patch #13 nf_conncount key length remains in the u32 bound, from Yunjian Wang.

Patch #14 removes unnecessary check for CTA_TIMEOUT_L3PROTO when setting
          default conntrack timeouts via nfnetlink_cttimeout API, from
          Lin Ma.

Patch #15 updates NFT_SECMARK_CTX_MAXLEN to 4096, SELinux could use
          larger secctx names than the existing 256 bytes length.

Patch #16 adds a selftest to exercise nfnetlink_queue listeners leaving
          nfnetlink_queue, from Florian Westphal.

Patch #17 increases hitcount from 255 to 65535 in xt_recent, from Phil Sutter.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 147 insertions, 77 deletions

diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index 188d41da1a40..1bfdd16890fa 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -1176,7 +1176,7 @@ static inline bool nft_chain_is_bound(struct nft_chain *chain)
 
 int nft_chain_add(struct nft_table *table, struct nft_chain *chain);
 void nft_chain_del(struct nft_chain *chain);
-void nf_tables_chain_destroy(struct nft_ctx *ctx);
+void nf_tables_chain_destroy(struct nft_chain *chain);
 
 struct nft_stats {
 	u64			bytes;
@@ -1613,41 +1613,67 @@ static inline int nft_set_elem_is_dead(const struct nft_set_ext *ext)
 }
 
 /**
- *	struct nft_trans - nf_tables object update in transaction
+ * struct nft_trans - nf_tables object update in transaction
  *
- *	@list: used internally
- *	@binding_list: list of objects with possible bindings
- *	@msg_type: message type
- *	@put_net: ctx->net needs to be put
- *	@ctx: transaction context
- *	@data: internal information related to the transaction
+ * @list: used internally
+ * @net: struct net
+ * @table: struct nft_table the object resides in
+ * @msg_type: message type
+ * @seq: netlink sequence number
+ * @flags: modifiers to new request
+ * @report: notify via unicast netlink message
+ * @put_net: net needs to be put
+ *
+ * This is the information common to all objects in the transaction,
+ * this must always be the first member of derived sub-types.
  */
 struct nft_trans {
 	struct list_head		list;
-	struct list_head		binding_list;
+	struct net			*net;
+	struct nft_table		*table;
 	int				msg_type;
-	bool				put_net;
-	struct nft_ctx			ctx;
-	char				data[];
+	u32				seq;
+	u16				flags;
+	u8				report:1;
+	u8				put_net:1;
+};
+
+/**
+ * struct nft_trans_binding - nf_tables object with binding support in transaction
+ * @nft_trans:    base structure, MUST be first member
+ * @binding_list: list of objects with possible bindings
+ *
+ * This is the base type used by objects that can be bound to a chain.
+ */
+struct nft_trans_binding {
+	struct nft_trans nft_trans;
+	struct list_head binding_list;
 };
 
 struct nft_trans_rule {
+	struct nft_trans		nft_trans;
 	struct nft_rule			*rule;
+	struct nft_chain		*chain;
 	struct nft_flow_rule		*flow;
 	u32				rule_id;
 	bool				bound;
 };
 
-#define nft_trans_rule(trans)	\
-	(((struct nft_trans_rule *)trans->data)->rule)
-#define nft_trans_flow_rule(trans)	\
-	(((struct nft_trans_rule *)trans->data)->flow)
-#define nft_trans_rule_id(trans)	\
-	(((struct nft_trans_rule *)trans->data)->rule_id)
-#define nft_trans_rule_bound(trans)	\
-	(((struct nft_trans_rule *)trans->data)->bound)
+#define nft_trans_container_rule(trans)			\
+	container_of(trans, struct nft_trans_rule, nft_trans)
+#define nft_trans_rule(trans)				\
+	nft_trans_container_rule(trans)->rule
+#define nft_trans_flow_rule(trans)			\
+	nft_trans_container_rule(trans)->flow
+#define nft_trans_rule_id(trans)			\
+	nft_trans_container_rule(trans)->rule_id
+#define nft_trans_rule_bound(trans)			\
+	nft_trans_container_rule(trans)->bound
+#define nft_trans_rule_chain(trans)	\
+	nft_trans_container_rule(trans)->chain
 
 struct nft_trans_set {
+	struct nft_trans_binding	nft_trans_binding;
 	struct nft_set			*set;
 	u32				set_id;
 	u32				gc_int;
@@ -1657,100 +1683,117 @@ struct nft_trans_set {
 	u32				size;
 };
 
-#define nft_trans_set(trans)	\
-	(((struct nft_trans_set *)trans->data)->set)
-#define nft_trans_set_id(trans)	\
-	(((struct nft_trans_set *)trans->data)->set_id)
-#define nft_trans_set_bound(trans)	\
-	(((struct nft_trans_set *)trans->data)->bound)
-#define nft_trans_set_update(trans)	\
-	(((struct nft_trans_set *)trans->data)->update)
-#define nft_trans_set_timeout(trans)	\
-	(((struct nft_trans_set *)trans->data)->timeout)
-#define nft_trans_set_gc_int(trans)	\
-	(((struct nft_trans_set *)trans->data)->gc_int)
-#define nft_trans_set_size(trans)	\
-	(((struct nft_trans_set *)trans->data)->size)
+#define nft_trans_container_set(t)	\
+	container_of(t, struct nft_trans_set, nft_trans_binding.nft_trans)
+#define nft_trans_set(trans)				\
+	nft_trans_container_set(trans)->set
+#define nft_trans_set_id(trans)				\
+	nft_trans_container_set(trans)->set_id
+#define nft_trans_set_bound(trans)			\
+	nft_trans_container_set(trans)->bound
+#define nft_trans_set_update(trans)			\
+	nft_trans_container_set(trans)->update
+#define nft_trans_set_timeout(trans)			\
+	nft_trans_container_set(trans)->timeout
+#define nft_trans_set_gc_int(trans)			\
+	nft_trans_container_set(trans)->gc_int
+#define nft_trans_set_size(trans)			\
+	nft_trans_container_set(trans)->size
 
 struct nft_trans_chain {
+	struct nft_trans_binding	nft_trans_binding;
 	struct nft_chain		*chain;
-	bool				update;
 	char				*name;
 	struct nft_stats __percpu	*stats;
 	u8				policy;
+	bool				update;
 	bool				bound;
 	u32				chain_id;
 	struct nft_base_chain		*basechain;
 	struct list_head		hook_list;
 };
 
-#define nft_trans_chain(trans)	\
-	(((struct nft_trans_chain *)trans->data)->chain)
-#define nft_trans_chain_update(trans)	\
-	(((struct nft_trans_chain *)trans->data)->update)
-#define nft_trans_chain_name(trans)	\
-	(((struct nft_trans_chain *)trans->data)->name)
-#define nft_trans_chain_stats(trans)	\
-	(((struct nft_trans_chain *)trans->data)->stats)
-#define nft_trans_chain_policy(trans)	\
-	(((struct nft_trans_chain *)trans->data)->policy)
-#define nft_trans_chain_bound(trans)	\
-	(((struct nft_trans_chain *)trans->data)->bound)
-#define nft_trans_chain_id(trans)	\
-	(((struct nft_trans_chain *)trans->data)->chain_id)
-#define nft_trans_basechain(trans)	\
-	(((struct nft_trans_chain *)trans->data)->basechain)
-#define nft_trans_chain_hooks(trans)	\
-	(((struct nft_trans_chain *)trans->data)->hook_list)
+#define nft_trans_container_chain(t)	\
+	container_of(t, struct nft_trans_chain, nft_trans_binding.nft_trans)
+#define nft_trans_chain(trans)				\
+	nft_trans_container_chain(trans)->chain
+#define nft_trans_chain_update(trans)			\
+	nft_trans_container_chain(trans)->update
+#define nft_trans_chain_name(trans)			\
+	nft_trans_container_chain(trans)->name
+#define nft_trans_chain_stats(trans)			\
+	nft_trans_container_chain(trans)->stats
+#define nft_trans_chain_policy(trans)			\
+	nft_trans_container_chain(trans)->policy
+#define nft_trans_chain_bound(trans)			\
+	nft_trans_container_chain(trans)->bound
+#define nft_trans_chain_id(trans)			\
+	nft_trans_container_chain(trans)->chain_id
+#define nft_trans_basechain(trans)			\
+	nft_trans_container_chain(trans)->basechain
+#define nft_trans_chain_hooks(trans)			\
+	nft_trans_container_chain(trans)->hook_list
 
 struct nft_trans_table {
+	struct nft_trans		nft_trans;
 	bool				update;
 };
 
-#define nft_trans_table_update(trans)	\
-	(((struct nft_trans_table *)trans->data)->update)
+#define nft_trans_container_table(trans)		\
+	container_of(trans, struct nft_trans_table, nft_trans)
+#define nft_trans_table_update(trans)			\
+	nft_trans_container_table(trans)->update
 
 struct nft_trans_elem {
+	struct nft_trans		nft_trans;
 	struct nft_set			*set;
 	struct nft_elem_priv		*elem_priv;
 	bool				bound;
 };
 
-#define nft_trans_elem_set(trans)	\
-	(((struct nft_trans_elem *)trans->data)->set)
-#define nft_trans_elem_priv(trans)	\
-	(((struct nft_trans_elem *)trans->data)->elem_priv)
-#define nft_trans_elem_set_bound(trans)	\
-	(((struct nft_trans_elem *)trans->data)->bound)
+#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_set_bound(trans)			\
+	nft_trans_container_elem(trans)->bound
 
 struct nft_trans_obj {
+	struct nft_trans		nft_trans;
 	struct nft_object		*obj;
 	struct nft_object		*newobj;
 	bool				update;
 };
 
-#define nft_trans_obj(trans)	\
-	(((struct nft_trans_obj *)trans->data)->obj)
-#define nft_trans_obj_newobj(trans) \
-	(((struct nft_trans_obj *)trans->data)->newobj)
-#define nft_trans_obj_update(trans)	\
-	(((struct nft_trans_obj *)trans->data)->update)
+#define nft_trans_container_obj(t)			\
+	container_of(t, struct nft_trans_obj, nft_trans)
+#define nft_trans_obj(trans)				\
+	nft_trans_container_obj(trans)->obj
+#define nft_trans_obj_newobj(trans)			\
+	nft_trans_container_obj(trans)->newobj
+#define nft_trans_obj_update(trans)			\
+	nft_trans_container_obj(trans)->update
 
 struct nft_trans_flowtable {
+	struct nft_trans		nft_trans;
 	struct nft_flowtable		*flowtable;
-	bool				update;
 	struct list_head		hook_list;
 	u32				flags;
+	bool				update;
 };
 
-#define nft_trans_flowtable(trans)	\
-	(((struct nft_trans_flowtable *)trans->data)->flowtable)
-#define nft_trans_flowtable_update(trans)	\
-	(((struct nft_trans_flowtable *)trans->data)->update)
-#define nft_trans_flowtable_hooks(trans)	\
-	(((struct nft_trans_flowtable *)trans->data)->hook_list)
-#define nft_trans_flowtable_flags(trans)	\
-	(((struct nft_trans_flowtable *)trans->data)->flags)
+#define nft_trans_container_flowtable(t)		\
+	container_of(t, struct nft_trans_flowtable, nft_trans)
+#define nft_trans_flowtable(trans)			\
+	nft_trans_container_flowtable(trans)->flowtable
+#define nft_trans_flowtable_update(trans)		\
+	nft_trans_container_flowtable(trans)->update
+#define nft_trans_flowtable_hooks(trans)		\
+	nft_trans_container_flowtable(trans)->hook_list
+#define nft_trans_flowtable_flags(trans)		\
+	nft_trans_container_flowtable(trans)->flags
 
 #define NFT_TRANS_GC_BATCHCOUNT	256
 
@@ -1764,6 +1807,33 @@ struct nft_trans_gc {
 	struct rcu_head		rcu;
 };
 
+static inline void nft_ctx_update(struct nft_ctx *ctx,
+				  const struct nft_trans *trans)
+{
+	switch (trans->msg_type) {
+	case NFT_MSG_NEWRULE:
+	case NFT_MSG_DELRULE:
+	case NFT_MSG_DESTROYRULE:
+		ctx->chain = nft_trans_rule_chain(trans);
+		break;
+	case NFT_MSG_NEWCHAIN:
+	case NFT_MSG_DELCHAIN:
+	case NFT_MSG_DESTROYCHAIN:
+		ctx->chain = nft_trans_chain(trans);
+		break;
+	default:
+		ctx->chain = NULL;
+		break;
+	}
+
+	ctx->net = trans->net;
+	ctx->table = trans->table;
+	ctx->family = trans->table->family;
+	ctx->report = trans->report;
+	ctx->flags = trans->flags;
+	ctx->seq = trans->seq;
+}
+
 struct nft_trans_gc *nft_trans_gc_alloc(struct nft_set *set,
 					unsigned int gc_seq, gfp_t gfp);
 void nft_trans_gc_destroy(struct nft_trans_gc *trans);
diff --git a/include/uapi/linux/netfilter/nf_tables.h b/include/uapi/linux/netfilter/nf_tables.h
index aa4094ca2444..639894ed1b97 100644
--- a/include/uapi/linux/netfilter/nf_tables.h
+++ b/include/uapi/linux/netfilter/nf_tables.h
@@ -1376,7 +1376,7 @@ enum nft_secmark_attributes {
 #define NFTA_SECMARK_MAX	(__NFTA_SECMARK_MAX - 1)
 
 /* Max security context length */
-#define NFT_SECMARK_CTX_MAXLEN		256
+#define NFT_SECMARK_CTX_MAXLEN		4096
 
 /**
  * enum nft_reject_types - nf_tables reject expression reject types