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; }