2 * include/linux/nfsd/cache.h
4 * Request reply cache. This was heavily inspired by the
5 * implementation in 4.3BSD/4.4BSD.
7 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
13 #include <linux/sunrpc/svc.h>
16 * Representation of a reply cache entry.
19 struct hlist_node c_hash;
20 struct list_head c_lru;
22 unsigned char c_state, /* unused, inprog, done */
23 c_type, /* status, buffer */
24 c_secure : 1; /* req came from port < 1024 */
25 struct sockaddr_in c_addr;
30 unsigned long c_timestamp;
37 #define c_replvec c_u.u_vec
38 #define c_replstat c_u.u_status
40 /* cache entry states */
57 * We may want to add more types one day, e.g. for diropres and
58 * attrstat replies. Using cache entries with fixed length instead
59 * of buffer pointers may be more efficient.
68 * If requests are retransmitted within this interval, they're dropped.
70 #define RC_DELAY (HZ/5)
72 int nfsd_reply_cache_init(void);
73 void nfsd_reply_cache_shutdown(void);
74 int nfsd_cache_lookup(struct svc_rqst *, int);
75 void nfsd_cache_update(struct svc_rqst *, int, __be32 *);
78 void nfsd4_set_statp(struct svc_rqst *rqstp, __be32 *statp);
79 #else /* CONFIG_NFSD_V4 */
80 static inline void nfsd4_set_statp(struct svc_rqst *rqstp, __be32 *statp)
83 #endif /* CONFIG_NFSD_V4 */
85 #endif /* NFSCACHE_H */