fs/lockd/svc4proc.c

28 	struct nlm_lock		*lock = &argp->lock;
35 	if (lock->lock_start > OFFSET_MAX ||
36 	    (lock->lock_len && ((lock->lock_len - 1) > (OFFSET_MAX - lock->lock_start))))
40 	if (!(host = nlmsvc_lookup_host(rqstp, lock->caller, lock->len))
47 		int mode = lock_to_openmode(&lock->fl);
49 		error = nlm_lookup_file(rqstp, &file, lock);
55 		lock->fl.c.flc_flags = FL_POSIX;
56 		lock->fl.c.flc_file  = file->f_file[mode];
57 		lock->fl.c.flc_pid = current->tgid;
58 		lock->fl.fl_start = (loff_t)lock->lock_start;
59 		lock->fl.fl_end = lock->lock_len ?
60 				   (loff_t)(lock->lock_start + lock->lock_len - 1) :
62 		lock->fl.fl_lmops = &nlmsvc_lock_operations;
63 		nlmsvc_locks_init_private(&lock->fl, host, (pid_t)lock->svid);
64 		if (!lock->fl.c.flc_owner) {
91  * TEST: Check for conflicting lock
109 	test_owner = argp->lock.fl.c.flc_owner;
111 	resp->status = nlmsvc_testlock(rqstp, file, host, &argp->lock, &resp->lock, &resp->cookie);
157 	/* Now try to lock the file */
158 	resp->status = nlmsvc_lock(rqstp, file, host, &argp->lock,
166 	nlmsvc_release_lockowner(&argp->lock);
200 	resp->status = nlmsvc_cancel_blocked(SVC_NET(rqstp), file, &argp->lock);
203 	nlmsvc_release_lockowner(&argp->lock);
216  * UNLOCK: release a lock
229 	/* Don't accept new lock requests during grace period */
239 	/* Now try to remove the lock */
240 	resp->status = nlmsvc_unlock(SVC_NET(rqstp), file, &argp->lock);
243 	nlmsvc_release_lockowner(&argp->lock);
256  * GRANTED: A server calls us to tell that a process' lock request
267 	resp->status = nlmclnt_grant(svc_addr(rqstp), &argp->lock);
309 				  argp->lock.caller,
310 				  argp->lock.len);
376 	/* Don't accept new lock requests during grace period */
390 	nlmsvc_release_lockowner(&argp->lock);
421 	/* Now try to lock the file */
425 	nlmsvc_release_lockowner(&argp->lock);
432  * NM_LOCK: Create an unmonitored lock