android_kernel_xiaomi_sm8350/include/linux/lockd/bind.h
Chuck Lever 52c4044d00 NLM: Introduce external nlm_host set-up and tear-down functions
We would like to remove the per-lock-operation nlm_lookup_host() call from
nlmclnt_proc().

The new architecture pins an nlm_host structure to each NFS client
superblock that has the "lock" mount option set.  The NFS client passes
in the pinned nlm_host structure during each call to nlmclnt_proc().  NFS
client unmount processing "puts" the nlm_host so it can be garbage-
collected later.

This patch introduces externally callable NLM functions that handle
mount-time nlm_host set up and tear-down.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30 02:06:06 -05:00

58 lines
1.3 KiB
C

/*
* linux/include/linux/lockd/bind.h
*
* This is the part of lockd visible to nfsd and the nfs client.
*
* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
*/
#ifndef LINUX_LOCKD_BIND_H
#define LINUX_LOCKD_BIND_H
#include <linux/lockd/nlm.h>
/* need xdr-encoded error codes too, so... */
#include <linux/lockd/xdr.h>
#ifdef CONFIG_LOCKD_V4
#include <linux/lockd/xdr4.h>
#endif
/* Dummy declarations */
struct svc_rqst;
/*
* This is the set of functions for lockd->nfsd communication
*/
struct nlmsvc_binding {
__be32 (*fopen)(struct svc_rqst *,
struct nfs_fh *,
struct file **);
void (*fclose)(struct file *);
unsigned long (*get_grace_period)(void);
};
extern struct nlmsvc_binding * nlmsvc_ops;
/*
* Functions exported by the lockd module
*/
extern struct nlm_host *nlmclnt_init(const char *server_name,
const struct sockaddr *server_address,
size_t server_addrlen,
unsigned short protocol,
u32 nfs_version);
extern void nlmclnt_done(struct nlm_host *host);
extern int nlmclnt_proc(struct inode *, int, struct file_lock *);
extern int lockd_up(int proto);
extern void lockd_down(void);
unsigned long get_nfs_grace_period(void);
#ifdef CONFIG_NFSD_V4
unsigned long get_nfs4_grace_period(void);
#else
static inline unsigned long get_nfs4_grace_period(void) {return 0;}
#endif
#endif /* LINUX_LOCKD_BIND_H */