1 files changed, 34 insertions, 6 deletions

diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h
index 2d8b211b9324..6f52b4d7c447 100644
--- a/include/linux/sunrpc/cache.h
+++ b/include/linux/sunrpc/cache.h
@@ -59,6 +59,15 @@ struct cache_head {
 
 #define CACHE_NEW_EXPIRY 120    /* keep new things pending confirmation for 120 seconds */
 
+struct cache_detail_procfs {
+        struct proc_dir_entry   *proc_ent;
+        struct proc_dir_entry   *flush_ent, *channel_ent, *content_ent;
+};
+
+struct cache_detail_pipefs {
+        struct dentry *dir;
+};
+
 struct cache_detail {
         struct module *         owner;
         int                     hash_size;
@@ -70,15 +79,17 @@ struct cache_detail {
         char                    *name;
         void                    (*cache_put)(struct kref *);
 
-        void                    (*cache_request)(struct cache_detail *cd,
-                                                 struct cache_head *h,
-                                                 char **bpp, int *blen);
+        int                     (*cache_upcall)(struct cache_detail *,
+                                                struct cache_head *);
+
         int                     (*cache_parse)(struct cache_detail *,
                                                char *buf, int len);
 
         int                     (*cache_show)(struct seq_file *m,
                                               struct cache_detail *cd,
                                               struct cache_head *h);
+        void                    (*warn_no_listener)(struct cache_detail *cd,
+                                              int has_died);
 
         struct cache_head *     (*alloc)(void);
         int                     (*match)(struct cache_head *orig, struct cache_head *new);
@@ -96,13 +107,15 @@ struct cache_detail {
 
         /* fields for communication over channel */
         struct list_head        queue;
-        struct proc_dir_entry   *proc_ent;
-        struct proc_dir_entry   *flush_ent, *channel_ent, *content_ent;
 
         atomic_t                readers;                /* how many time is /chennel open */
         time_t                  last_close;             /* if no readers, when did last close */
         time_t                  last_warn;              /* when we last warned about no readers */
-        void                    (*warn_no_listener)(struct cache_detail *cd);
+
+        union {
+                struct cache_detail_procfs procfs;
+                struct cache_detail_pipefs pipefs;
+        } u;
 };
 
 
@@ -127,6 +140,10 @@ struct cache_deferred_req {
 };
 
 
+extern const struct file_operations cache_file_operations_pipefs;
+extern const struct file_operations content_file_operations_pipefs;
+extern const struct file_operations cache_flush_operations_pipefs;
+
 extern struct cache_head *
 sunrpc_cache_lookup(struct cache_detail *detail,
                     struct cache_head *key, int hash);
@@ -134,6 +151,13 @@ extern struct cache_head *
 sunrpc_cache_update(struct cache_detail *detail,
                     struct cache_head *new, struct cache_head *old, int hash);
 
+extern int
+sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h,
+                void (*cache_request)(struct cache_detail *,
+                                      struct cache_head *,
+                                      char **,
+                                      int *));
+
 
 extern void cache_clean_deferred(void *owner);
 
@@ -171,6 +195,10 @@ extern void cache_purge(struct cache_detail *detail);
 extern int cache_register(struct cache_detail *cd);
 extern void cache_unregister(struct cache_detail *cd);
 
+extern int sunrpc_cache_register_pipefs(struct dentry *parent, const char *,
+                                        mode_t, struct cache_detail *);
+extern void sunrpc_cache_unregister_pipefs(struct cache_detail *);
+
 extern void qword_add(char **bpp, int *lp, char *str);
 extern void qword_addhex(char **bpp, int *lp, char *buf, int blen);
 extern int qword_get(char **bpp, char *dest, int bufsize);