static __be32
nlmsvc_proc_test(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_res *resp)
{
struct nlm_host *host;
struct nlm_file *file;
__be32 rc = rpc_success;
dprintk("lockd: TEST called\n");
resp->cookie = argp->cookie;
if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
resp->status = cast_status(nlmsvc_testlock(rqstp, file, host, &argp->lock, &resp->lock, &resp->cookie));
if (resp->status == nlm_drop_reply)
rc = rpc_drop_reply;
else
dprintk("lockd: TEST status %d vers %d\n",
ntohl(resp->status), rqstp->rq_vers);
nlmsvc_release_host(host);
nlm_release_file(file);
return rc;
}
/*
* TEST: Check for conflicting lock
*/
static __be32
nlm4svc_proc_test(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_res *resp)
{
struct nlm_host *host;
struct nlm_file *file;
__be32 rc = rpc_success;
dprintk("lockd: TEST4 called\n");
resp->cookie = argp->cookie;
/* Obtain client and file */
if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
/* Now check for conflicting locks */
resp->status = nlmsvc_testlock(rqstp, file, host, &argp->lock, &resp->lock, &resp->cookie);
if (resp->status == nlm_drop_reply)
rc = rpc_drop_reply;
else
dprintk("lockd: TEST4 status %d\n", ntohl(resp->status));
nlmsvc_release_host(host);
nlm_release_file(file);
return rc;
}
/*
* UNSHARE: Release a DOS share.
*/
static __be32
nlm4svc_proc_unshare(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_res *resp)
{
struct nlm_host *host;
struct nlm_file *file;
dprintk("lockd: UNSHARE called\n");
resp->cookie = argp->cookie;
/* Don't accept requests during grace period */
if (locks_in_grace(SVC_NET(rqstp))) {
resp->status = nlm_lck_denied_grace_period;
return rpc_success;
}
/* Obtain client and file */
if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
/* Now try to lock the file */
resp->status = nlmsvc_unshare_file(host, file, argp);
dprintk("lockd: UNSHARE status %d\n", ntohl(resp->status));
nlmsvc_release_host(host);
nlm_release_file(file);
return rpc_success;
}
static __be32
nlm4svc_proc_cancel(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_res *resp)
{
struct nlm_host *host;
struct nlm_file *file;
dprintk("lockd: CANCEL called\n");
resp->cookie = argp->cookie;
/* Don't accept requests during grace period */
if (locks_in_grace(SVC_NET(rqstp))) {
resp->status = nlm_lck_denied_grace_period;
return rpc_success;
}
/* Obtain client and file */
if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
/* Try to cancel request. */
resp->status = nlmsvc_cancel_blocked(SVC_NET(rqstp), file, &argp->lock);
dprintk("lockd: CANCEL status %d\n", ntohl(resp->status));
nlmsvc_release_host(host);
nlm_release_file(file);
return rpc_success;
}
/*
* UNLOCK: release a lock
*/
static __be32
nlm4svc_proc_unlock(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_res *resp)
{
struct nlm_host *host;
struct nlm_file *file;
dprintk("lockd: UNLOCK called\n");
resp->cookie = argp->cookie;
/* Don't accept new lock requests during grace period */
if (locks_in_grace()) {
resp->status = nlm_lck_denied_grace_period;
return rpc_success;
}
/* Obtain client and file */
if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
/* Now try to remove the lock */
resp->status = nlmsvc_unlock(file, &argp->lock);
dprintk("lockd: UNLOCK status %d\n", ntohl(resp->status));
nlmsvc_release_host(host);
nlm_release_file(file);
return rpc_success;
}
static __be32
nlmsvc_proc_unshare(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_res *resp)
{
struct nlm_host *host;
struct nlm_file *file;
dprintk("lockd: UNSHARE called\n");
resp->cookie = argp->cookie;
if (locks_in_grace()) {
resp->status = nlm_lck_denied_grace_period;
return rpc_success;
}
if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
resp->status = cast_status(nlmsvc_unshare_file(host, file, argp));
dprintk("lockd: UNSHARE status %d\n", ntohl(resp->status));
nlmsvc_release_host(host);
nlm_release_file(file);
return rpc_success;
}
void nlmsvc_release_call(struct nlm_rqst *call)
{
if (!atomic_dec_and_test(&call->a_count))
return;
nlmsvc_release_host(call->a_host);
kfree(call);
}
static __be32
nlmsvc_proc_lock(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_res *resp)
{
struct nlm_host *host;
struct nlm_file *file;
__be32 rc = rpc_success;
dprintk("lockd: LOCK called\n");
resp->cookie = argp->cookie;
if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
#if 0
if (host->h_nsmstate && host->h_nsmstate != argp->state) {
resp->status = nlm_lck_denied_nolocks;
} else
#endif
resp->status = cast_status(nlmsvc_lock(rqstp, file, host, &argp->lock,
argp->block, &argp->cookie,
argp->reclaim));
if (resp->status == nlm_drop_reply)
rc = rpc_drop_reply;
else
dprintk("lockd: LOCK status %d\n", ntohl(resp->status));
nlmsvc_release_host(host);
nlm_release_file(file);
return rc;
}
/*
* `Async' versions of the above service routines. They aren't really,
* because we send the callback before the reply proper. I hope this
* doesn't break any clients.
*/
static __be32 nlm4svc_callback(struct svc_rqst *rqstp, u32 proc, struct nlm_args *argp,
__be32 (*func)(struct svc_rqst *, struct nlm_args *, struct nlm_res *))
{
struct nlm_host *host;
struct nlm_rqst *call;
__be32 stat;
host = nlmsvc_lookup_host(rqstp,
argp->lock.caller,
argp->lock.len);
if (host == NULL)
return rpc_system_err;
call = nlm_alloc_call(host);
nlmsvc_release_host(host);
if (call == NULL)
return rpc_system_err;
stat = func(rqstp, argp, &call->a_res);
if (stat != 0) {
nlmsvc_release_call(call);
return stat;
}
call->a_flags = RPC_TASK_ASYNC;
if (nlm_async_reply(call, proc, &nlm4svc_callback_ops) < 0)
return rpc_system_err;
return rpc_success;
}
/*
* FREE_ALL: Release all locks and shares held by client
*/
static __be32
nlm4svc_proc_free_all(struct svc_rqst *rqstp, struct nlm_args *argp,
void *resp)
{
struct nlm_host *host;
/* Obtain client */
if (nlm4svc_retrieve_args(rqstp, argp, &host, NULL))
return rpc_success;
nlmsvc_free_host_resources(host);
nlmsvc_release_host(host);
return rpc_success;
}
static __be32
nlm4svc_proc_lock(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_res *resp)
{
struct nlm_host *host;
struct nlm_file *file;
__be32 rc = rpc_success;
dprintk("lockd: LOCK called\n");
resp->cookie = argp->cookie;
/* Obtain client and file */
if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
#if 0
/* If supplied state doesn't match current state, we assume it's
* an old request that time-warped somehow. Any error return would
* do in this case because it's irrelevant anyway.
*
* NB: We don't retrieve the remote host's state yet.
*/
if (host->h_nsmstate && host->h_nsmstate != argp->state) {
resp->status = nlm_lck_denied_nolocks;
} else
#endif
/* Now try to lock the file */
resp->status = nlmsvc_lock(rqstp, file, host, &argp->lock,
argp->block, &argp->cookie,
argp->reclaim);
if (resp->status == nlm_drop_reply)
rc = rpc_drop_reply;
else
dprintk("lockd: LOCK status %d\n", ntohl(resp->status));
nlmsvc_release_host(host);
nlm_release_file(file);
return rc;
}
static __be32
nlmsvc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_host **hostp, struct nlm_file **filp)
{
struct nlm_host *host = NULL;
struct nlm_file *file = NULL;
struct nlm_lock *lock = &argp->lock;
__be32 error = 0;
if (!nlmsvc_ops)
return nlm_lck_denied_nolocks;
if (!(host = nlmsvc_lookup_host(rqstp, lock->caller, lock->len))
|| (argp->monitor && nsm_monitor(host) < 0))
goto no_locks;
*hostp = host;
if (filp != NULL) {
error = cast_status(nlm_lookup_file(rqstp, &file, &lock->fh));
if (error != 0)
goto no_locks;
*filp = file;
lock->fl.fl_file = file->f_file;
lock->fl.fl_owner = (fl_owner_t) host;
lock->fl.fl_lmops = &nlmsvc_lock_operations;
}
return 0;
no_locks:
nlmsvc_release_host(host);
if (error)
return error;
return nlm_lck_denied_nolocks;
}
/*
* Obtain client and file from arguments
*/
static __be32
nlm4svc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_host **hostp, struct nlm_file **filp)
{
struct nlm_host *host = NULL;
struct nlm_file *file = NULL;
struct nlm_lock *lock = &argp->lock;
__be32 error = 0;
/* nfsd callbacks must have been installed for this procedure */
if (!nlmsvc_ops)
return nlm_lck_denied_nolocks;
/* Obtain host handle */
if (!(host = nlmsvc_lookup_host(rqstp, lock->caller, lock->len))
|| (argp->monitor && nsm_monitor(host) < 0))
goto no_locks;
*hostp = host;
/* Obtain file pointer. Not used by FREE_ALL call. */
if (filp != NULL) {
if ((error = nlm_lookup_file(rqstp, &file, &lock->fh)) != 0)
goto no_locks;
*filp = file;
/* Set up the missing parts of the file_lock structure */
lock->fl.fl_file = file->f_file;
lock->fl.fl_owner = (fl_owner_t) host;
lock->fl.fl_lmops = &nlmsvc_lock_operations;
}
return 0;
no_locks:
nlmsvc_release_host(host);
if (error)
return error;
return nlm_lck_denied_nolocks;
}
