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10#include <linux/types.h>
11#include <linux/sched.h>
12#include <linux/utsname.h>
13#include <linux/nfs.h>
14
15#include <linux/sunrpc/xdr.h>
16#include <linux/sunrpc/clnt.h>
17#include <linux/sunrpc/svc.h>
18#include <linux/sunrpc/stats.h>
19#include <linux/lockd/lockd.h>
20#include <linux/lockd/sm_inter.h>
21
22#define NLMDBG_FACILITY NLMDBG_XDR
23
24static inline loff_t
25s64_to_loff_t(__s64 offset)
26{
27 return (loff_t)offset;
28}
29
30
31static inline s64
32loff_t_to_s64(loff_t offset)
33{
34 s64 res;
35 if (offset > NLM4_OFFSET_MAX)
36 res = NLM4_OFFSET_MAX;
37 else if (offset < -NLM4_OFFSET_MAX)
38 res = -NLM4_OFFSET_MAX;
39 else
40 res = offset;
41 return res;
42}
43
44
45
46
47static u32 *
48nlm4_decode_cookie(u32 *p, struct nlm_cookie *c)
49{
50 unsigned int len;
51
52 len = ntohl(*p++);
53
54 if(len==0)
55 {
56 c->len=4;
57 memset(c->data, 0, 4);
58 }
59 else if(len<=NLM_MAXCOOKIELEN)
60 {
61 c->len=len;
62 memcpy(c->data, p, len);
63 p+=(len+3)>>2;
64 }
65 else
66 {
67 printk(KERN_NOTICE
68 "lockd: bad cookie size %d (only cookies under %d bytes are supported.)\n", len, NLM_MAXCOOKIELEN);
69 return NULL;
70 }
71 return p;
72}
73
74static u32 *
75nlm4_encode_cookie(u32 *p, struct nlm_cookie *c)
76{
77 *p++ = htonl(c->len);
78 memcpy(p, c->data, c->len);
79 p+=(c->len+3)>>2;
80 return p;
81}
82
83static u32 *
84nlm4_decode_fh(u32 *p, struct nfs_fh *f)
85{
86 memset(f->data, 0, sizeof(f->data));
87 f->size = ntohl(*p++);
88 if (f->size > NFS_MAXFHSIZE) {
89 printk(KERN_NOTICE
90 "lockd: bad fhandle size %d (should be <=%d)\n",
91 f->size, NFS_MAXFHSIZE);
92 return NULL;
93 }
94 memcpy(f->data, p, f->size);
95 return p + XDR_QUADLEN(f->size);
96}
97
98static u32 *
99nlm4_encode_fh(u32 *p, struct nfs_fh *f)
100{
101 *p++ = htonl(f->size);
102 if (f->size) p[XDR_QUADLEN(f->size)-1] = 0;
103 memcpy(p, f->data, f->size);
104 return p + XDR_QUADLEN(f->size);
105}
106
107
108
109
110static u32 *
111nlm4_decode_oh(u32 *p, struct xdr_netobj *oh)
112{
113 return xdr_decode_netobj(p, oh);
114}
115
116static u32 *
117nlm4_encode_oh(u32 *p, struct xdr_netobj *oh)
118{
119 return xdr_encode_netobj(p, oh);
120}
121
122static u32 *
123nlm4_decode_lock(u32 *p, struct nlm_lock *lock)
124{
125 struct file_lock *fl = &lock->fl;
126 __s64 len, start, end;
127
128 if (!(p = xdr_decode_string_inplace(p, &lock->caller,
129 &lock->len, NLM_MAXSTRLEN))
130 || !(p = nlm4_decode_fh(p, &lock->fh))
131 || !(p = nlm4_decode_oh(p, &lock->oh)))
132 return NULL;
133
134 locks_init_lock(fl);
135 fl->fl_owner = current->files;
136 fl->fl_pid = ntohl(*p++);
137 fl->fl_flags = FL_POSIX;
138 fl->fl_type = F_RDLCK;
139 p = xdr_decode_hyper(p, &start);
140 p = xdr_decode_hyper(p, &len);
141 end = start + len - 1;
142
143 fl->fl_start = s64_to_loff_t(start);
144
145 if (len == 0 || end < 0)
146 fl->fl_end = OFFSET_MAX;
147 else
148 fl->fl_end = s64_to_loff_t(end);
149 return p;
150}
151
152
153
154
155static u32 *
156nlm4_encode_lock(u32 *p, struct nlm_lock *lock)
157{
158 struct file_lock *fl = &lock->fl;
159 __s64 start, len;
160
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)))
164 return NULL;
165
166 if (fl->fl_start > NLM4_OFFSET_MAX
167 || (fl->fl_end > NLM4_OFFSET_MAX && fl->fl_end != OFFSET_MAX))
168 return NULL;
169
170 *p++ = htonl(fl->fl_pid);
171
172 start = loff_t_to_s64(fl->fl_start);
173 if (fl->fl_end == OFFSET_MAX)
174 len = 0;
175 else
176 len = loff_t_to_s64(fl->fl_end - fl->fl_start + 1);
177
178 p = xdr_encode_hyper(p, start);
179 p = xdr_encode_hyper(p, len);
180
181 return p;
182}
183
184
185
186
187static u32 *
188nlm4_encode_testres(u32 *p, struct nlm_res *resp)
189{
190 s64 start, len;
191
192 dprintk("xdr: before encode_testres (p %p resp %p)\n", p, resp);
193 if (!(p = nlm4_encode_cookie(p, &resp->cookie)))
194 return 0;
195 *p++ = resp->status;
196
197 if (resp->status == nlm_lck_denied) {
198 struct file_lock *fl = &resp->lock.fl;
199
200 *p++ = (fl->fl_type == F_RDLCK)? xdr_zero : xdr_one;
201 *p++ = htonl(fl->fl_pid);
202
203
204 if (!(p = xdr_encode_netobj(p, &resp->lock.oh)))
205 return 0;
206
207 start = loff_t_to_s64(fl->fl_start);
208 if (fl->fl_end == OFFSET_MAX)
209 len = 0;
210 else
211 len = loff_t_to_s64(fl->fl_end - fl->fl_start + 1);
212
213 p = xdr_encode_hyper(p, start);
214 p = xdr_encode_hyper(p, len);
215 dprintk("xdr: encode_testres (status %d pid %d type %d start %Ld end %Ld)\n",
216 resp->status, fl->fl_pid, fl->fl_type,
217 (long long)fl->fl_start, (long long)fl->fl_end);
218 }
219
220 dprintk("xdr: after encode_testres (p %p resp %p)\n", p, resp);
221 return p;
222}
223
224
225
226
227
228static int
229xdr_argsize_check(struct svc_rqst *rqstp, u32 *p)
230{
231 struct svc_buf *buf = &rqstp->rq_argbuf;
232
233 return p - buf->base <= buf->buflen;
234}
235
236static int
237xdr_ressize_check(struct svc_rqst *rqstp, u32 *p)
238{
239 struct svc_buf *buf = &rqstp->rq_resbuf;
240
241 buf->len = p - buf->base;
242 return (buf->len <= buf->buflen);
243}
244
245
246
247
248int
249nlm4svc_decode_testargs(struct svc_rqst *rqstp, u32 *p, nlm_args *argp)
250{
251 u32 exclusive;
252
253 if (!(p = nlm4_decode_cookie(p, &argp->cookie)))
254 return 0;
255
256 exclusive = ntohl(*p++);
257 if (!(p = nlm4_decode_lock(p, &argp->lock)))
258 return 0;
259 if (exclusive)
260 argp->lock.fl.fl_type = F_WRLCK;
261
262 return xdr_argsize_check(rqstp, p);
263}
264
265int
266nlm4svc_encode_testres(struct svc_rqst *rqstp, u32 *p, struct nlm_res *resp)
267{
268 if (!(p = nlm4_encode_testres(p, resp)))
269 return 0;
270 return xdr_ressize_check(rqstp, p);
271}
272
273int
274nlm4svc_decode_lockargs(struct svc_rqst *rqstp, u32 *p, nlm_args *argp)
275{
276 u32 exclusive;
277
278 if (!(p = nlm4_decode_cookie(p, &argp->cookie)))
279 return 0;
280 argp->block = ntohl(*p++);
281 exclusive = ntohl(*p++);
282 if (!(p = nlm4_decode_lock(p, &argp->lock)))
283 return 0;
284 if (exclusive)
285 argp->lock.fl.fl_type = F_WRLCK;
286 argp->reclaim = ntohl(*p++);
287 argp->state = ntohl(*p++);
288 argp->monitor = 1;
289
290 return xdr_argsize_check(rqstp, p);
291}
292
293int
294nlm4svc_decode_cancargs(struct svc_rqst *rqstp, u32 *p, nlm_args *argp)
295{
296 u32 exclusive;
297
298 if (!(p = nlm4_decode_cookie(p, &argp->cookie)))
299 return 0;
300 argp->block = ntohl(*p++);
301 exclusive = ntohl(*p++);
302 if (!(p = nlm4_decode_lock(p, &argp->lock)))
303 return 0;
304 if (exclusive)
305 argp->lock.fl.fl_type = F_WRLCK;
306 return xdr_argsize_check(rqstp, p);
307}
308
309int
310nlm4svc_decode_unlockargs(struct svc_rqst *rqstp, u32 *p, nlm_args *argp)
311{
312 if (!(p = nlm4_decode_cookie(p, &argp->cookie))
313 || !(p = nlm4_decode_lock(p, &argp->lock)))
314 return 0;
315 argp->lock.fl.fl_type = F_UNLCK;
316 return xdr_argsize_check(rqstp, p);
317}
318
319int
320nlm4svc_decode_shareargs(struct svc_rqst *rqstp, u32 *p, nlm_args *argp)
321{
322 struct nlm_lock *lock = &argp->lock;
323
324 memset(lock, 0, sizeof(*lock));
325 locks_init_lock(&lock->fl);
326 lock->fl.fl_pid = ~(u32) 0;
327
328 if (!(p = nlm4_decode_cookie(p, &argp->cookie))
329 || !(p = xdr_decode_string_inplace(p, &lock->caller,
330 &lock->len, NLM_MAXSTRLEN))
331 || !(p = nlm4_decode_fh(p, &lock->fh))
332 || !(p = nlm4_decode_oh(p, &lock->oh)))
333 return 0;
334 argp->fsm_mode = ntohl(*p++);
335 argp->fsm_access = ntohl(*p++);
336 return xdr_argsize_check(rqstp, p);
337}
338
339int
340nlm4svc_encode_shareres(struct svc_rqst *rqstp, u32 *p, struct nlm_res *resp)
341{
342 if (!(p = nlm4_encode_cookie(p, &resp->cookie)))
343 return 0;
344 *p++ = resp->status;
345 *p++ = xdr_zero;
346 return xdr_ressize_check(rqstp, p);
347}
348
349int
350nlm4svc_encode_res(struct svc_rqst *rqstp, u32 *p, struct nlm_res *resp)
351{
352 if (!(p = nlm4_encode_cookie(p, &resp->cookie)))
353 return 0;
354 *p++ = resp->status;
355 return xdr_ressize_check(rqstp, p);
356}
357
358int
359nlm4svc_decode_notify(struct svc_rqst *rqstp, u32 *p, struct nlm_args *argp)
360{
361 struct nlm_lock *lock = &argp->lock;
362
363 if (!(p = xdr_decode_string_inplace(p, &lock->caller,
364 &lock->len, NLM_MAXSTRLEN)))
365 return 0;
366 argp->state = ntohl(*p++);
367 return xdr_argsize_check(rqstp, p);
368}
369
370int
371nlm4svc_decode_reboot(struct svc_rqst *rqstp, u32 *p, struct nlm_reboot *argp)
372{
373 if (!(p = xdr_decode_string_inplace(p, &argp->mon, &argp->len, SM_MAXSTRLEN)))
374 return 0;
375 argp->state = ntohl(*p++);
376
377 argp->addr = *p++;
378 return xdr_argsize_check(rqstp, p);
379}
380
381int
382nlm4svc_decode_res(struct svc_rqst *rqstp, u32 *p, struct nlm_res *resp)
383{
384 if (!(p = nlm4_decode_cookie(p, &resp->cookie)))
385 return 0;
386 resp->status = ntohl(*p++);
387 return xdr_argsize_check(rqstp, p);
388}
389
390int
391nlm4svc_decode_void(struct svc_rqst *rqstp, u32 *p, void *dummy)
392{
393 return xdr_argsize_check(rqstp, p);
394}
395
396int
397nlm4svc_encode_void(struct svc_rqst *rqstp, u32 *p, void *dummy)
398{
399 return xdr_ressize_check(rqstp, p);
400}
401
402
403
404
405static int
406nlm4clt_encode_void(struct rpc_rqst *req, u32 *p, void *ptr)
407{
408 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
409 return 0;
410}
411
412static int
413nlm4clt_decode_void(struct rpc_rqst *req, u32 *p, void *ptr)
414{
415 return 0;
416}
417
418static int
419nlm4clt_encode_testargs(struct rpc_rqst *req, u32 *p, nlm_args *argp)
420{
421 struct nlm_lock *lock = &argp->lock;
422
423 if (!(p = nlm4_encode_cookie(p, &argp->cookie)))
424 return -EIO;
425 *p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero;
426 if (!(p = nlm4_encode_lock(p, lock)))
427 return -EIO;
428 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
429 return 0;
430}
431
432static int
433nlm4clt_decode_testres(struct rpc_rqst *req, u32 *p, struct nlm_res *resp)
434{
435 if (!(p = nlm4_decode_cookie(p, &resp->cookie)))
436 return -EIO;
437 resp->status = ntohl(*p++);
438 if (resp->status == NLM_LCK_DENIED) {
439 struct file_lock *fl = &resp->lock.fl;
440 u32 excl;
441 s64 start, end, len;
442
443 memset(&resp->lock, 0, sizeof(resp->lock));
444 locks_init_lock(fl);
445 excl = ntohl(*p++);
446 fl->fl_pid = ntohl(*p++);
447 if (!(p = nlm4_decode_oh(p, &resp->lock.oh)))
448 return -EIO;
449
450 fl->fl_flags = FL_POSIX;
451 fl->fl_type = excl? F_WRLCK : F_RDLCK;
452 p = xdr_decode_hyper(p, &start);
453 p = xdr_decode_hyper(p, &len);
454 end = start + len - 1;
455
456 fl->fl_start = s64_to_loff_t(start);
457 if (len == 0 || end < 0)
458 fl->fl_end = OFFSET_MAX;
459 else
460 fl->fl_end = s64_to_loff_t(end);
461 }
462 return 0;
463}
464
465
466static int
467nlm4clt_encode_lockargs(struct rpc_rqst *req, u32 *p, nlm_args *argp)
468{
469 struct nlm_lock *lock = &argp->lock;
470
471 if (!(p = nlm4_encode_cookie(p, &argp->cookie)))
472 return -EIO;
473 *p++ = argp->block? xdr_one : xdr_zero;
474 *p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero;
475 if (!(p = nlm4_encode_lock(p, lock)))
476 return -EIO;
477 *p++ = argp->reclaim? xdr_one : xdr_zero;
478 *p++ = htonl(argp->state);
479 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
480 return 0;
481}
482
483static int
484nlm4clt_encode_cancargs(struct rpc_rqst *req, u32 *p, nlm_args *argp)
485{
486 struct nlm_lock *lock = &argp->lock;
487
488 if (!(p = nlm4_encode_cookie(p, &argp->cookie)))
489 return -EIO;
490 *p++ = argp->block? xdr_one : xdr_zero;
491 *p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero;
492 if (!(p = nlm4_encode_lock(p, lock)))
493 return -EIO;
494 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
495 return 0;
496}
497
498static int
499nlm4clt_encode_unlockargs(struct rpc_rqst *req, u32 *p, nlm_args *argp)
500{
501 struct nlm_lock *lock = &argp->lock;
502
503 if (!(p = nlm4_encode_cookie(p, &argp->cookie)))
504 return -EIO;
505 if (!(p = nlm4_encode_lock(p, lock)))
506 return -EIO;
507 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
508 return 0;
509}
510
511static int
512nlm4clt_encode_res(struct rpc_rqst *req, u32 *p, struct nlm_res *resp)
513{
514 if (!(p = nlm4_encode_cookie(p, &resp->cookie)))
515 return -EIO;
516 *p++ = resp->status;
517 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
518 return 0;
519}
520
521static int
522nlm4clt_encode_testres(struct rpc_rqst *req, u32 *p, struct nlm_res *resp)
523{
524 if (!(p = nlm4_encode_testres(p, resp)))
525 return -EIO;
526 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
527 return 0;
528}
529
530static int
531nlm4clt_decode_res(struct rpc_rqst *req, u32 *p, struct nlm_res *resp)
532{
533 if (!(p = nlm4_decode_cookie(p, &resp->cookie)))
534 return -EIO;
535 resp->status = ntohl(*p++);
536 return 0;
537}
538
539
540
541
542#define NLM4_void_sz 0
543#define NLM4_cookie_sz 1+XDR_QUADLEN(NLM_MAXCOOKIELEN)
544#define NLM4_caller_sz 1+XDR_QUADLEN(NLM_MAXSTRLEN)
545#define NLM4_netobj_sz 1+XDR_QUADLEN(XDR_MAX_NETOBJ)
546
547#define NLM4_fhandle_sz 1+XDR_QUADLEN(NFS3_FHSIZE)
548#define NLM4_lock_sz 5+NLM4_caller_sz+NLM4_netobj_sz+NLM4_fhandle_sz
549#define NLM4_holder_sz 6+NLM4_netobj_sz
550
551#define NLM4_testargs_sz NLM4_cookie_sz+1+NLM4_lock_sz
552#define NLM4_lockargs_sz NLM4_cookie_sz+4+NLM4_lock_sz
553#define NLM4_cancargs_sz NLM4_cookie_sz+2+NLM4_lock_sz
554#define NLM4_unlockargs_sz NLM4_cookie_sz+NLM4_lock_sz
555
556#define NLM4_testres_sz NLM4_cookie_sz+1+NLM4_holder_sz
557#define NLM4_res_sz NLM4_cookie_sz+1
558#define NLM4_norep_sz 0
559
560#ifndef MAX
561# define MAX(a,b) (((a) > (b))? (a) : (b))
562#endif
563
564
565
566
567#define nlm4clt_decode_norep NULL
568
569#define PROC(proc, argtype, restype) \
570 { .p_procname = "nlm4_" #proc, \
571 .p_encode = (kxdrproc_t) nlm4clt_encode_##argtype, \
572 .p_decode = (kxdrproc_t) nlm4clt_decode_##restype, \
573 .p_bufsiz = MAX(NLM4_##argtype##_sz, NLM4_##restype##_sz) << 2 \
574 }
575
576static struct rpc_procinfo nlm4_procedures[] = {
577 PROC(null, void, void),
578 PROC(test, testargs, testres),
579 PROC(lock, lockargs, res),
580 PROC(canc, cancargs, res),
581 PROC(unlock, unlockargs, res),
582 PROC(granted, testargs, res),
583 PROC(test_msg, testargs, norep),
584 PROC(lock_msg, lockargs, norep),
585 PROC(canc_msg, cancargs, norep),
586 PROC(unlock_msg, unlockargs, norep),
587 PROC(granted_msg, testargs, norep),
588 PROC(test_res, testres, norep),
589 PROC(lock_res, res, norep),
590 PROC(canc_res, res, norep),
591 PROC(unlock_res, res, norep),
592 PROC(granted_res, res, norep),
593 PROC(undef, void, void),
594 PROC(undef, void, void),
595 PROC(undef, void, void),
596 PROC(undef, void, void),
597#ifdef NLMCLNT_SUPPORT_SHARES
598 PROC(share, shareargs, shareres),
599 PROC(unshare, shareargs, shareres),
600 PROC(nm_lock, lockargs, res),
601 PROC(free_all, notify, void),
602#else
603 PROC(undef, void, void),
604 PROC(undef, void, void),
605 PROC(undef, void, void),
606 PROC(undef, void, void),
607#endif
608};
609
610struct rpc_version nlm_version4 = {
611 4, 24, nlm4_procedures,
612};
613
