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NLM: Introduce external nlm_host set-up and tear-down functions

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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>
This commit is contained in:
Chuck Lever
2008-01-11 17:09:44 -05:00
committed by Trond Myklebust
parent 86d61d8638
commit 52c4044d00
2 changed files with 55 additions and 0 deletions
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7
include/linux/lockd/bind.h
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@@ -35,6 +35,13 @@ 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);