1 /* 2 * linux/include/linux/lockd/bind.h 3 * 4 * This is the part of lockd visible to nfsd and the nfs client. 5 * 6 * Copyright (C) 1996, Olaf Kirch <[email protected]> 7 */ 8 9 #ifndef LINUX_LOCKD_BIND_H 10 #define LINUX_LOCKD_BIND_H 11 12 #include <linux/lockd/nlm.h> 13 /* need xdr-encoded error codes too, so... */ 14 #include <linux/lockd/xdr.h> 15 #ifdef CONFIG_LOCKD_V4 16 #include <linux/lockd/xdr4.h> 17 #endif 18 19 /* Dummy declarations */ 20 struct svc_rqst; 21 struct rpc_task; 22 23 /* 24 * This is the set of functions for lockd->nfsd communication 25 */ 26 struct nlmsvc_binding { 27 __be32 (*fopen)(struct svc_rqst *, 28 struct nfs_fh *, 29 struct file **); 30 void (*fclose)(struct file *); 31 }; 32 33 extern const struct nlmsvc_binding *nlmsvc_ops; 34 35 /* 36 * Similar to nfs_client_initdata, but without the NFS-specific 37 * rpc_ops field. 38 */ 39 struct nlmclnt_initdata { 40 const char *hostname; 41 const struct sockaddr *address; 42 size_t addrlen; 43 unsigned short protocol; 44 u32 nfs_version; 45 int noresvport; 46 struct net *net; 47 const struct nlmclnt_operations *nlmclnt_ops; 48 }; 49 50 /* 51 * Functions exported by the lockd module 52 */ 53 54 extern struct nlm_host *nlmclnt_init(const struct nlmclnt_initdata *nlm_init); 55 extern void nlmclnt_done(struct nlm_host *host); 56 57 /* 58 * NLM client operations provide a means to modify RPC processing of NLM 59 * requests. Callbacks receive a pointer to data passed into the call to 60 * nlmclnt_proc(). 61 */ 62 struct nlmclnt_operations { 63 /* Called on successful allocation of nlm_rqst, use for allocation or 64 * reference counting. */ 65 void (*nlmclnt_alloc_call)(void *); 66 67 /* Called in rpc_task_prepare for unlock. A return value of true 68 * indicates the callback has put the task to sleep on a waitqueue 69 * and NLM should not call rpc_call_start(). */ 70 bool (*nlmclnt_unlock_prepare)(struct rpc_task*, void *); 71 72 /* Called when the nlm_rqst is freed, callbacks should clean up here */ 73 void (*nlmclnt_release_call)(void *); 74 }; 75 76 extern int nlmclnt_proc(struct nlm_host *host, int cmd, struct file_lock *fl, void *data); 77 extern int lockd_up(struct net *net); 78 extern void lockd_down(struct net *net); 79 80 #endif /* LINUX_LOCKD_BIND_H */ 81