9df69c81b4
This patch subscribes DNS resolver caches to RPC pipefs notifications. Notifier is registering on NFS module load. This notifier callback is responsible for creation/destruction of PipeFS DNS resolver cache directory. Note that no locking required in notifier callback because PipeFS superblock pointer is passed as an argument from it's creation or destruction routine and thus we can be sure about it's validity. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
34 lines
1.1 KiB
C
34 lines
1.1 KiB
C
/*
|
|
* Helper routines for the NFS client caches
|
|
*
|
|
* Copyright (c) 2009 Trond Myklebust <Trond.Myklebust@netapp.com>
|
|
*/
|
|
|
|
#include <linux/completion.h>
|
|
#include <linux/sunrpc/cache.h>
|
|
#include <linux/atomic.h>
|
|
|
|
/*
|
|
* Deferred request handling
|
|
*/
|
|
struct nfs_cache_defer_req {
|
|
struct cache_req req;
|
|
struct cache_deferred_req deferred_req;
|
|
struct completion completion;
|
|
atomic_t count;
|
|
};
|
|
|
|
extern int nfs_cache_upcall(struct cache_detail *cd, char *entry_name);
|
|
extern struct nfs_cache_defer_req *nfs_cache_defer_req_alloc(void);
|
|
extern void nfs_cache_defer_req_put(struct nfs_cache_defer_req *dreq);
|
|
extern int nfs_cache_wait_for_upcall(struct nfs_cache_defer_req *dreq);
|
|
|
|
extern void nfs_cache_init(struct cache_detail *cd);
|
|
extern void nfs_cache_destroy(struct cache_detail *cd);
|
|
extern int nfs_cache_register_net(struct net *net, struct cache_detail *cd);
|
|
extern void nfs_cache_unregister_net(struct net *net, struct cache_detail *cd);
|
|
extern int nfs_cache_register_sb(struct super_block *sb,
|
|
struct cache_detail *cd);
|
|
extern void nfs_cache_unregister_sb(struct super_block *sb,
|
|
struct cache_detail *cd);
|