sunrpc: add a new cache_detail operation for when a cache is flushed

When the exports table is changed, exportfs will usually write a new time to the "flush" file in the nfsd.export cache procfile. This tells the kernel to flush any entries that are older than that value. This gives us a mechanism to tell whether an unexport might have occurred. Add a new ->flush cache_detail operation that is called after flushing the cache whenever someone writes to a "flush" file.

Jeff Layton committed 7 years ago

Commit f69d6d81 parent 48660732 files · +4 −0Browse files

Showing the changes to include/linux (1 of 2 files). Show all

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include/linux/sunrpc/cache.h+1−0

@@ -87,6 +87,7 @@ struct cache_detail { · 86 unmodified lines
87	int has_died);	87	int has_died);
88		88
89	struct cache_head * (*alloc)(void);	89	struct cache_head * (*alloc)(void);
		90	void (*flush)(void);
90	int (match)(struct cache_head orig, struct cache_head *new);	91	int (match)(struct cache_head orig, struct cache_head *new);
91	void (init)(struct cache_head orig, struct cache_head *new);	92	void (init)(struct cache_head orig, struct cache_head *new);
92	void (update)(struct cache_head orig, struct cache_head *new);	93	void (update)(struct cache_head orig, struct cache_head *new);

sunrpc: add a new cache_detail operation for when a cache is flushed

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