add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/net/tipc/subscr.h
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@@ -47,12 +47,15 @@
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 /**
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  * struct tipc_subscription - TIPC network topology subscription object
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- * @subscriber: pointer to its subscriber
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- * @seq: name sequence associated with subscription
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+ * @kref: reference count for this subscription
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+ * @net: network namespace associated with subscription
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  * @timer: timer governing subscription duration (optional)
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- * @nameseq_list: adjacent subscriptions in name sequence's subscription list
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+ * @service_list: adjacent subscriptions in name sequence's subscription list
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  * @sub_list: adjacent subscriptions in subscriber's subscription list
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  * @evt: template for events generated by subscription
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+ * @conid: connection identifier of topology server
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+ * @inactive: true if this subscription is inactive
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+ * @lock: serialize up/down and timer events
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  */
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 struct tipc_subscription {
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 	struct kref kref;
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@@ -63,7 +66,7 @@
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 	struct tipc_event evt;
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 	int conid;
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 	bool inactive;
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-	spinlock_t lock; /* serialize up/down and timer events */
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+	spinlock_t lock;
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 };
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 struct tipc_subscription *tipc_sub_subscribe(struct net *net,
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@@ -96,6 +99,16 @@
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 		(swap_ ? swab32(val__) : val__);			\
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 	})
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+/* tipc_sub_write - write val_ to field_ of struct sub_ in user endian format
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+ */
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+#define tipc_sub_write(sub_, field_, val_)				\
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+	({								\
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+		struct tipc_subscr *sub__ = sub_;			\
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+		u32 val__ = val_;					\
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+		int swap_ = !((sub__)->filter & TIPC_FILTER_MASK);	\
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+		(sub__)->field_ = swap_ ? swab32(val__) : val__;	\
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+	})
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+
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 /* tipc_evt_write - write val_ to field_ of struct evt_ in user endian format
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  */
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 #define tipc_evt_write(evt_, field_, val_)				\