1 files changed, 58 insertions, 57 deletions

diff --git a/include/net/smc.h b/include/net/smc.h
index c926d3313e05..bfdc4c41f019 100644
--- a/include/net/smc.h
+++ b/include/net/smc.h
@@ -15,7 +15,10 @@
 #include <linux/spinlock.h>
 #include <linux/types.h>
 #include <linux/wait.h>
+#include <linux/dibs.h>
 
+struct tcp_sock;
+struct inet_request_sock;
 struct sock;
 
 #define SMC_MAX_PNETID_LEN	16	/* Max. length of PNET id */
@@ -25,62 +28,16 @@ struct smc_hashinfo {
 	struct hlist_head ht;
 };
 
-int smc_hash_sk(struct sock *sk);
-void smc_unhash_sk(struct sock *sk);
-
 /* SMCD/ISM device driver interface */
-struct smcd_dmb {
-	u64 dmb_tok;
-	u64 rgid;
-	u32 dmb_len;
-	u32 sba_idx;
-	u32 vlan_valid;
-	u32 vlan_id;
-	void *cpu_addr;
-	dma_addr_t dma_addr;
-};
-
-#define ISM_EVENT_DMB	0
-#define ISM_EVENT_GID	1
-#define ISM_EVENT_SWR	2
-
 #define ISM_RESERVED_VLANID	0x1FFF
 
-#define ISM_ERROR	0xFFFF
-
-struct smcd_event {
-	u32 type;
-	u32 code;
-	u64 tok;
-	u64 time;
-	u64 info;
-};
-
-struct smcd_dev;
-
-struct smcd_ops {
-	int (*query_remote_gid)(struct smcd_dev *dev, u64 rgid, u32 vid_valid,
-				u32 vid);
-	int (*register_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb);
-	int (*unregister_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb);
-	int (*add_vlan_id)(struct smcd_dev *dev, u64 vlan_id);
-	int (*del_vlan_id)(struct smcd_dev *dev, u64 vlan_id);
-	int (*set_vlan_required)(struct smcd_dev *dev);
-	int (*reset_vlan_required)(struct smcd_dev *dev);
-	int (*signal_event)(struct smcd_dev *dev, u64 rgid, u32 trigger_irq,
-			    u32 event_code, u64 info);
-	int (*move_data)(struct smcd_dev *dev, u64 dmb_tok, unsigned int idx,
-			 bool sf, unsigned int offset, void *data,
-			 unsigned int size);
-	u8* (*get_system_eid)(void);
-	u16 (*get_chid)(struct smcd_dev *dev);
+struct smcd_gid {
+	u64	gid;
+	u64	gid_ext;
 };
 
 struct smcd_dev {
-	const struct smcd_ops *ops;
-	struct device dev;
-	void *priv;
-	u64 local_gid;
+	struct dibs_dev *dibs;
 	struct list_head list;
 	spinlock_t lock;
 	struct smc_connection **conn;
@@ -95,11 +52,55 @@ struct smcd_dev {
 	u8 going_away : 1;
 };
 
-struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name,
-				const struct smcd_ops *ops, int max_dmbs);
-int smcd_register_dev(struct smcd_dev *smcd);
-void smcd_unregister_dev(struct smcd_dev *smcd);
-void smcd_free_dev(struct smcd_dev *smcd);
-void smcd_handle_event(struct smcd_dev *dev, struct smcd_event *event);
-void smcd_handle_irq(struct smcd_dev *dev, unsigned int bit, u16 dmbemask);
+#define SMC_HS_CTRL_NAME_MAX 16
+
+enum {
+	/* ops can be inherit from init_net */
+	SMC_HS_CTRL_FLAG_INHERITABLE = 0x1,
+
+	SMC_HS_CTRL_ALL_FLAGS = SMC_HS_CTRL_FLAG_INHERITABLE,
+};
+
+struct smc_hs_ctrl {
+	/* private */
+
+	struct list_head list;
+	struct module *owner;
+
+	/* public */
+
+	/* unique name */
+	char name[SMC_HS_CTRL_NAME_MAX];
+	int flags;
+
+	/* Invoked before computing SMC option for SYN packets.
+	 * We can control whether to set SMC options by returning various value.
+	 * Return 0 to disable SMC, or return any other value to enable it.
+	 */
+	int (*syn_option)(struct tcp_sock *tp);
+
+	/* Invoked before Set up SMC options for SYN-ACK packets
+	 * We can control whether to respond SMC options by returning various
+	 * value. Return 0 to disable SMC, or return any other value to enable
+	 * it.
+	 */
+	int (*synack_option)(const struct tcp_sock *tp,
+			     struct inet_request_sock *ireq);
+};
+
+#if IS_ENABLED(CONFIG_SMC_HS_CTRL_BPF)
+#define smc_call_hsbpf(init_val, tp, func, ...) ({				\
+	typeof(init_val) __ret = (init_val);					\
+	struct smc_hs_ctrl *ctrl;						\
+	rcu_read_lock();							\
+	ctrl = rcu_dereference(sock_net((struct sock *)(tp))->smc.hs_ctrl);	\
+	if (ctrl && ctrl->func)							\
+		__ret = ctrl->func(tp, ##__VA_ARGS__);				\
+	rcu_read_unlock();							\
+	__ret;									\
+})
+#else
+#define smc_call_hsbpf(init_val, tp, ...)  ({ (void)(tp); (init_val); })
+#endif /* CONFIG_SMC_HS_CTRL_BPF */
+
 #endif	/* _SMC_H */