2 * linux/fs/lockd/xdr4.c
4 * XDR support for lockd and the lock client.
6 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
7 * Copyright (C) 1999, Trond Myklebust <trond.myklebust@fys.uio.no>
10 #include <linux/types.h>
11 #include <linux/sched.h>
12 #include <linux/nfs.h>
14 #include <linux/sunrpc/xdr.h>
15 #include <linux/sunrpc/clnt.h>
16 #include <linux/sunrpc/svc.h>
17 #include <linux/sunrpc/stats.h>
18 #include <linux/lockd/lockd.h>
20 #define NLMDBG_FACILITY NLMDBG_XDR
23 s64_to_loff_t(__s64 offset)
25 return (loff_t)offset;
30 loff_t_to_s64(loff_t offset)
33 if (offset > NLM4_OFFSET_MAX)
34 res = NLM4_OFFSET_MAX;
35 else if (offset < -NLM4_OFFSET_MAX)
36 res = -NLM4_OFFSET_MAX;
43 * XDR functions for basic NLM types
46 nlm4_decode_cookie(__be32 *p, struct nlm_cookie *c)
55 memset(c->data, 0, 4); /* hockeypux brain damage */
57 else if(len<=NLM_MAXCOOKIELEN)
60 memcpy(c->data, p, len);
65 dprintk("lockd: bad cookie size %d (only cookies under "
66 "%d bytes are supported.)\n",
67 len, NLM_MAXCOOKIELEN);
74 nlm4_encode_cookie(__be32 *p, struct nlm_cookie *c)
77 memcpy(p, c->data, c->len);
78 p+=XDR_QUADLEN(c->len);
83 nlm4_decode_fh(__be32 *p, struct nfs_fh *f)
85 memset(f->data, 0, sizeof(f->data));
86 f->size = ntohl(*p++);
87 if (f->size > NFS_MAXFHSIZE) {
88 dprintk("lockd: bad fhandle size %d (should be <=%d)\n",
89 f->size, NFS_MAXFHSIZE);
92 memcpy(f->data, p, f->size);
93 return p + XDR_QUADLEN(f->size);
97 nlm4_encode_fh(__be32 *p, struct nfs_fh *f)
99 *p++ = htonl(f->size);
100 if (f->size) p[XDR_QUADLEN(f->size)-1] = 0; /* don't leak anything */
101 memcpy(p, f->data, f->size);
102 return p + XDR_QUADLEN(f->size);
106 * Encode and decode owner handle
109 nlm4_decode_oh(__be32 *p, struct xdr_netobj *oh)
111 return xdr_decode_netobj(p, oh);
115 nlm4_encode_oh(__be32 *p, struct xdr_netobj *oh)
117 return xdr_encode_netobj(p, oh);
121 nlm4_decode_lock(__be32 *p, struct nlm_lock *lock)
123 struct file_lock *fl = &lock->fl;
127 if (!(p = xdr_decode_string_inplace(p, &lock->caller,
128 &lock->len, NLM_MAXSTRLEN))
129 || !(p = nlm4_decode_fh(p, &lock->fh))
130 || !(p = nlm4_decode_oh(p, &lock->oh)))
132 lock->svid = ntohl(*p++);
135 fl->fl_owner = current->files;
136 fl->fl_pid = (pid_t)lock->svid;
137 fl->fl_flags = FL_POSIX;
138 fl->fl_type = F_RDLCK; /* as good as anything else */
139 p = xdr_decode_hyper(p, &start);
140 p = xdr_decode_hyper(p, &len);
141 end = start + len - 1;
143 fl->fl_start = s64_to_loff_t(start);
145 if (len == 0 || end < 0)
146 fl->fl_end = OFFSET_MAX;
148 fl->fl_end = s64_to_loff_t(end);
153 * Encode a lock as part of an NLM call
156 nlm4_encode_lock(__be32 *p, struct nlm_lock *lock)
158 struct file_lock *fl = &lock->fl;
161 if (!(p = xdr_encode_string(p, lock->caller))
162 || !(p = nlm4_encode_fh(p, &lock->fh))
163 || !(p = nlm4_encode_oh(p, &lock->oh)))
166 if (fl->fl_start > NLM4_OFFSET_MAX
167 || (fl->fl_end > NLM4_OFFSET_MAX && fl->fl_end != OFFSET_MAX))
170 *p++ = htonl(lock->svid);
172 start = loff_t_to_s64(fl->fl_start);
173 if (fl->fl_end == OFFSET_MAX)
176 len = loff_t_to_s64(fl->fl_end - fl->fl_start + 1);
178 p = xdr_encode_hyper(p, start);
179 p = xdr_encode_hyper(p, len);
185 * Encode result of a TEST/TEST_MSG call
188 nlm4_encode_testres(__be32 *p, struct nlm_res *resp)
192 dprintk("xdr: before encode_testres (p %p resp %p)\n", p, resp);
193 if (!(p = nlm4_encode_cookie(p, &resp->cookie)))
197 if (resp->status == nlm_lck_denied) {
198 struct file_lock *fl = &resp->lock.fl;
200 *p++ = (fl->fl_type == F_RDLCK)? xdr_zero : xdr_one;
201 *p++ = htonl(resp->lock.svid);
203 /* Encode owner handle. */
204 if (!(p = xdr_encode_netobj(p, &resp->lock.oh)))
207 start = loff_t_to_s64(fl->fl_start);
208 if (fl->fl_end == OFFSET_MAX)
211 len = loff_t_to_s64(fl->fl_end - fl->fl_start + 1);
213 p = xdr_encode_hyper(p, start);
214 p = xdr_encode_hyper(p, len);
215 dprintk("xdr: encode_testres (status %u pid %d type %d start %Ld end %Ld)\n",
216 resp->status, (int)resp->lock.svid, fl->fl_type,
217 (long long)fl->fl_start, (long long)fl->fl_end);
220 dprintk("xdr: after encode_testres (p %p resp %p)\n", p, resp);
226 * First, the server side XDR functions
229 nlm4svc_decode_testargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp)
233 if (!(p = nlm4_decode_cookie(p, &argp->cookie)))
236 exclusive = ntohl(*p++);
237 if (!(p = nlm4_decode_lock(p, &argp->lock)))
240 argp->lock.fl.fl_type = F_WRLCK;
242 return xdr_argsize_check(rqstp, p);
246 nlm4svc_encode_testres(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp)
248 if (!(p = nlm4_encode_testres(p, resp)))
250 return xdr_ressize_check(rqstp, p);
254 nlm4svc_decode_lockargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp)
258 if (!(p = nlm4_decode_cookie(p, &argp->cookie)))
260 argp->block = ntohl(*p++);
261 exclusive = ntohl(*p++);
262 if (!(p = nlm4_decode_lock(p, &argp->lock)))
265 argp->lock.fl.fl_type = F_WRLCK;
266 argp->reclaim = ntohl(*p++);
267 argp->state = ntohl(*p++);
268 argp->monitor = 1; /* monitor client by default */
270 return xdr_argsize_check(rqstp, p);
274 nlm4svc_decode_cancargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp)
278 if (!(p = nlm4_decode_cookie(p, &argp->cookie)))
280 argp->block = ntohl(*p++);
281 exclusive = ntohl(*p++);
282 if (!(p = nlm4_decode_lock(p, &argp->lock)))
285 argp->lock.fl.fl_type = F_WRLCK;
286 return xdr_argsize_check(rqstp, p);
290 nlm4svc_decode_unlockargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp)
292 if (!(p = nlm4_decode_cookie(p, &argp->cookie))
293 || !(p = nlm4_decode_lock(p, &argp->lock)))
295 argp->lock.fl.fl_type = F_UNLCK;
296 return xdr_argsize_check(rqstp, p);
300 nlm4svc_decode_shareargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp)
302 struct nlm_lock *lock = &argp->lock;
304 memset(lock, 0, sizeof(*lock));
305 locks_init_lock(&lock->fl);
306 lock->svid = ~(u32) 0;
307 lock->fl.fl_pid = (pid_t)lock->svid;
309 if (!(p = nlm4_decode_cookie(p, &argp->cookie))
310 || !(p = xdr_decode_string_inplace(p, &lock->caller,
311 &lock->len, NLM_MAXSTRLEN))
312 || !(p = nlm4_decode_fh(p, &lock->fh))
313 || !(p = nlm4_decode_oh(p, &lock->oh)))
315 argp->fsm_mode = ntohl(*p++);
316 argp->fsm_access = ntohl(*p++);
317 return xdr_argsize_check(rqstp, p);
321 nlm4svc_encode_shareres(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp)
323 if (!(p = nlm4_encode_cookie(p, &resp->cookie)))
326 *p++ = xdr_zero; /* sequence argument */
327 return xdr_ressize_check(rqstp, p);
331 nlm4svc_encode_res(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp)
333 if (!(p = nlm4_encode_cookie(p, &resp->cookie)))
336 return xdr_ressize_check(rqstp, p);
340 nlm4svc_decode_notify(struct svc_rqst *rqstp, __be32 *p, struct nlm_args *argp)
342 struct nlm_lock *lock = &argp->lock;
344 if (!(p = xdr_decode_string_inplace(p, &lock->caller,
345 &lock->len, NLM_MAXSTRLEN)))
347 argp->state = ntohl(*p++);
348 return xdr_argsize_check(rqstp, p);
352 nlm4svc_decode_reboot(struct svc_rqst *rqstp, __be32 *p, struct nlm_reboot *argp)
354 if (!(p = xdr_decode_string_inplace(p, &argp->mon, &argp->len, SM_MAXSTRLEN)))
356 argp->state = ntohl(*p++);
357 memcpy(&argp->priv.data, p, sizeof(argp->priv.data));
358 p += XDR_QUADLEN(SM_PRIV_SIZE);
359 return xdr_argsize_check(rqstp, p);
363 nlm4svc_decode_res(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp)
365 if (!(p = nlm4_decode_cookie(p, &resp->cookie)))
368 return xdr_argsize_check(rqstp, p);
372 nlm4svc_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
374 return xdr_argsize_check(rqstp, p);
378 nlm4svc_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
380 return xdr_ressize_check(rqstp, p);
384 * Now, the client side XDR functions
386 #ifdef NLMCLNT_SUPPORT_SHARES
388 nlm4clt_decode_void(struct rpc_rqst *req, __be32 *p, void *ptr)
395 nlm4clt_encode_testargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp)
397 struct nlm_lock *lock = &argp->lock;
399 if (!(p = nlm4_encode_cookie(p, &argp->cookie)))
401 *p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero;
402 if (!(p = nlm4_encode_lock(p, lock)))
404 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
409 nlm4clt_decode_testres(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp)
411 if (!(p = nlm4_decode_cookie(p, &resp->cookie)))
414 if (resp->status == nlm_lck_denied) {
415 struct file_lock *fl = &resp->lock.fl;
420 memset(&resp->lock, 0, sizeof(resp->lock));
423 resp->lock.svid = ntohl(*p++);
424 fl->fl_pid = (pid_t)resp->lock.svid;
425 if (!(p = nlm4_decode_oh(p, &resp->lock.oh)))
428 fl->fl_flags = FL_POSIX;
429 fl->fl_type = excl? F_WRLCK : F_RDLCK;
430 p = xdr_decode_hyper(p, &start);
431 p = xdr_decode_hyper(p, &len);
432 end = start + len - 1;
434 fl->fl_start = s64_to_loff_t(start);
435 if (len == 0 || end < 0)
436 fl->fl_end = OFFSET_MAX;
438 fl->fl_end = s64_to_loff_t(end);
445 nlm4clt_encode_lockargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp)
447 struct nlm_lock *lock = &argp->lock;
449 if (!(p = nlm4_encode_cookie(p, &argp->cookie)))
451 *p++ = argp->block? xdr_one : xdr_zero;
452 *p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero;
453 if (!(p = nlm4_encode_lock(p, lock)))
455 *p++ = argp->reclaim? xdr_one : xdr_zero;
456 *p++ = htonl(argp->state);
457 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
462 nlm4clt_encode_cancargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp)
464 struct nlm_lock *lock = &argp->lock;
466 if (!(p = nlm4_encode_cookie(p, &argp->cookie)))
468 *p++ = argp->block? xdr_one : xdr_zero;
469 *p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero;
470 if (!(p = nlm4_encode_lock(p, lock)))
472 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
477 nlm4clt_encode_unlockargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp)
479 struct nlm_lock *lock = &argp->lock;
481 if (!(p = nlm4_encode_cookie(p, &argp->cookie)))
483 if (!(p = nlm4_encode_lock(p, lock)))
485 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
490 nlm4clt_encode_res(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp)
492 if (!(p = nlm4_encode_cookie(p, &resp->cookie)))
495 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
500 nlm4clt_encode_testres(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp)
502 if (!(p = nlm4_encode_testres(p, resp)))
504 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
509 nlm4clt_decode_res(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp)
511 if (!(p = nlm4_decode_cookie(p, &resp->cookie)))
517 #if (NLMCLNT_OHSIZE > XDR_MAX_NETOBJ)
518 # error "NLM host name cannot be larger than XDR_MAX_NETOBJ!"
521 #if (NLMCLNT_OHSIZE > NLM_MAXSTRLEN)
522 # error "NLM host name cannot be larger than NLM's maximum string length!"
526 * Buffer requirements for NLM
528 #define NLM4_void_sz 0
529 #define NLM4_cookie_sz 1+XDR_QUADLEN(NLM_MAXCOOKIELEN)
530 #define NLM4_caller_sz 1+XDR_QUADLEN(NLMCLNT_OHSIZE)
531 #define NLM4_owner_sz 1+XDR_QUADLEN(NLMCLNT_OHSIZE)
532 #define NLM4_fhandle_sz 1+XDR_QUADLEN(NFS3_FHSIZE)
533 #define NLM4_lock_sz 5+NLM4_caller_sz+NLM4_owner_sz+NLM4_fhandle_sz
534 #define NLM4_holder_sz 6+NLM4_owner_sz
536 #define NLM4_testargs_sz NLM4_cookie_sz+1+NLM4_lock_sz
537 #define NLM4_lockargs_sz NLM4_cookie_sz+4+NLM4_lock_sz
538 #define NLM4_cancargs_sz NLM4_cookie_sz+2+NLM4_lock_sz
539 #define NLM4_unlockargs_sz NLM4_cookie_sz+NLM4_lock_sz
541 #define NLM4_testres_sz NLM4_cookie_sz+1+NLM4_holder_sz
542 #define NLM4_res_sz NLM4_cookie_sz+1
543 #define NLM4_norep_sz 0
546 * For NLM, a void procedure really returns nothing
548 #define nlm4clt_decode_norep NULL
550 #define PROC(proc, argtype, restype) \
551 [NLMPROC_##proc] = { \
552 .p_proc = NLMPROC_##proc, \
553 .p_encode = (kxdrproc_t) nlm4clt_encode_##argtype, \
554 .p_decode = (kxdrproc_t) nlm4clt_decode_##restype, \
555 .p_arglen = NLM4_##argtype##_sz, \
556 .p_replen = NLM4_##restype##_sz, \
557 .p_statidx = NLMPROC_##proc, \
561 static struct rpc_procinfo nlm4_procedures[] = {
562 PROC(TEST, testargs, testres),
563 PROC(LOCK, lockargs, res),
564 PROC(CANCEL, cancargs, res),
565 PROC(UNLOCK, unlockargs, res),
566 PROC(GRANTED, testargs, res),
567 PROC(TEST_MSG, testargs, norep),
568 PROC(LOCK_MSG, lockargs, norep),
569 PROC(CANCEL_MSG, cancargs, norep),
570 PROC(UNLOCK_MSG, unlockargs, norep),
571 PROC(GRANTED_MSG, testargs, norep),
572 PROC(TEST_RES, testres, norep),
573 PROC(LOCK_RES, res, norep),
574 PROC(CANCEL_RES, res, norep),
575 PROC(UNLOCK_RES, res, norep),
576 PROC(GRANTED_RES, res, norep),
577 #ifdef NLMCLNT_SUPPORT_SHARES
578 PROC(SHARE, shareargs, shareres),
579 PROC(UNSHARE, shareargs, shareres),
580 PROC(NM_LOCK, lockargs, res),
581 PROC(FREE_ALL, notify, void),
585 struct rpc_version nlm_version4 = {
588 .procs = nlm4_procedures,