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-rw-r--r--fs/lockd/Makefile4
-rw-r--r--fs/lockd/clntxdr.c643
-rw-r--r--fs/lockd/xdr.c258
3 files changed, 645 insertions, 260 deletions
diff --git a/fs/lockd/Makefile b/fs/lockd/Makefile
index 97f6073ab339..d0488b3bd00b 100644
--- a/fs/lockd/Makefile
+++ b/fs/lockd/Makefile
@@ -4,7 +4,7 @@
4 4
5obj-$(CONFIG_LOCKD) += lockd.o 5obj-$(CONFIG_LOCKD) += lockd.o
6 6
7lockd-objs-y := clntlock.o clntproc.o host.o svc.o svclock.o svcshare.o \ 7lockd-objs-y := clntlock.o clntproc.o clntxdr.o host.o svc.o svclock.o \
8 svcproc.o svcsubs.o mon.o xdr.o grace.o 8 svcshare.o svcproc.o svcsubs.o mon.o xdr.o grace.o
9lockd-objs-$(CONFIG_LOCKD_V4) += xdr4.o svc4proc.o 9lockd-objs-$(CONFIG_LOCKD_V4) += xdr4.o svc4proc.o
10lockd-objs := $(lockd-objs-y) 10lockd-objs := $(lockd-objs-y)
diff --git a/fs/lockd/clntxdr.c b/fs/lockd/clntxdr.c
new file mode 100644
index 000000000000..0472f2aff509
--- /dev/null
+++ b/fs/lockd/clntxdr.c
@@ -0,0 +1,643 @@
1/*
2 * linux/fs/lockd/clntxdr.c
3 *
4 * XDR functions to encode/decode NLM version 3 RPC arguments and results.
5 * NLM version 3 is backwards compatible with NLM versions 1 and 2.
6 *
7 * NLM client-side only.
8 *
9 * Copyright (C) 2010, Oracle. All rights reserved.
10 */
11
12#include <linux/types.h>
13#include <linux/sunrpc/xdr.h>
14#include <linux/sunrpc/clnt.h>
15#include <linux/sunrpc/stats.h>
16#include <linux/lockd/lockd.h>
17
18#define NLMDBG_FACILITY NLMDBG_XDR
19
20#if (NLMCLNT_OHSIZE > XDR_MAX_NETOBJ)
21# error "NLM host name cannot be larger than XDR_MAX_NETOBJ!"
22#endif
23
24/*
25 * Declare the space requirements for NLM arguments and replies as
26 * number of 32bit-words
27 */
28#define NLM_cookie_sz (1+(NLM_MAXCOOKIELEN>>2))
29#define NLM_caller_sz (1+(NLMCLNT_OHSIZE>>2))
30#define NLM_owner_sz (1+(NLMCLNT_OHSIZE>>2))
31#define NLM_fhandle_sz (1+(NFS2_FHSIZE>>2))
32#define NLM_lock_sz (3+NLM_caller_sz+NLM_owner_sz+NLM_fhandle_sz)
33#define NLM_holder_sz (4+NLM_owner_sz)
34
35#define NLM_testargs_sz (NLM_cookie_sz+1+NLM_lock_sz)
36#define NLM_lockargs_sz (NLM_cookie_sz+4+NLM_lock_sz)
37#define NLM_cancargs_sz (NLM_cookie_sz+2+NLM_lock_sz)
38#define NLM_unlockargs_sz (NLM_cookie_sz+NLM_lock_sz)
39
40#define NLM_testres_sz (NLM_cookie_sz+1+NLM_holder_sz)
41#define NLM_res_sz (NLM_cookie_sz+1)
42#define NLM_norep_sz (0)
43
44
45static s32 loff_t_to_s32(loff_t offset)
46{
47 s32 res;
48
49 if (offset >= NLM_OFFSET_MAX)
50 res = NLM_OFFSET_MAX;
51 else if (offset <= -NLM_OFFSET_MAX)
52 res = -NLM_OFFSET_MAX;
53 else
54 res = offset;
55 return res;
56}
57
58static void nlm_compute_offsets(const struct nlm_lock *lock,
59 u32 *l_offset, u32 *l_len)
60{
61 const struct file_lock *fl = &lock->fl;
62
63 BUG_ON(fl->fl_start > NLM_OFFSET_MAX);
64 BUG_ON(fl->fl_end > NLM_OFFSET_MAX &&
65 fl->fl_end != OFFSET_MAX);
66
67 *l_offset = loff_t_to_s32(fl->fl_start);
68 if (fl->fl_end == OFFSET_MAX)
69 *l_len = 0;
70 else
71 *l_len = loff_t_to_s32(fl->fl_end - fl->fl_start + 1);
72}
73
74/*
75 * Handle decode buffer overflows out-of-line.
76 */
77static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
78{
79 dprintk("lockd: %s prematurely hit the end of our receive buffer. "
80 "Remaining buffer length is %tu words.\n",
81 func, xdr->end - xdr->p);
82}
83
84
85/*
86 * Encode/decode NLMv3 basic data types
87 *
88 * Basic NLMv3 data types are not defined in an IETF standards
89 * document. X/Open has a description of these data types that
90 * is useful. See Chapter 10 of "Protocols for Interworking:
91 * XNFS, Version 3W".
92 *
93 * Not all basic data types have their own encoding and decoding
94 * functions. For run-time efficiency, some data types are encoded
95 * or decoded inline.
96 */
97
98static void encode_bool(struct xdr_stream *xdr, const int value)
99{
100 __be32 *p;
101
102 p = xdr_reserve_space(xdr, 4);
103 *p = value ? xdr_one : xdr_zero;
104}
105
106static void encode_int32(struct xdr_stream *xdr, const s32 value)
107{
108 __be32 *p;
109
110 p = xdr_reserve_space(xdr, 4);
111 *p = cpu_to_be32(value);
112}
113
114/*
115 * typedef opaque netobj<MAXNETOBJ_SZ>
116 */
117static void encode_netobj(struct xdr_stream *xdr,
118 const u8 *data, const unsigned int length)
119{
120 __be32 *p;
121
122 BUG_ON(length > XDR_MAX_NETOBJ);
123 p = xdr_reserve_space(xdr, 4 + length);
124 xdr_encode_opaque(p, data, length);
125}
126
127static int decode_netobj(struct xdr_stream *xdr,
128 struct xdr_netobj *obj)
129{
130 u32 length;
131 __be32 *p;
132
133 p = xdr_inline_decode(xdr, 4);
134 if (unlikely(p == NULL))
135 goto out_overflow;
136 length = be32_to_cpup(p++);
137 if (unlikely(length > XDR_MAX_NETOBJ))
138 goto out_size;
139 obj->len = length;
140 obj->data = (u8 *)p;
141 return 0;
142out_size:
143 dprintk("NFS: returned netobj was too long: %u\n", length);
144 return -EIO;
145out_overflow:
146 print_overflow_msg(__func__, xdr);
147 return -EIO;
148}
149
150/*
151 * netobj cookie;
152 */
153static void encode_cookie(struct xdr_stream *xdr,
154 const struct nlm_cookie *cookie)
155{
156 BUG_ON(cookie->len > NLM_MAXCOOKIELEN);
157 encode_netobj(xdr, (u8 *)&cookie->data, cookie->len);
158}
159
160static int decode_cookie(struct xdr_stream *xdr,
161 struct nlm_cookie *cookie)
162{
163 u32 length;
164 __be32 *p;
165
166 p = xdr_inline_decode(xdr, 4);
167 if (unlikely(p == NULL))
168 goto out_overflow;
169 length = be32_to_cpup(p++);
170 /* apparently HPUX can return empty cookies */
171 if (length == 0)
172 goto out_hpux;
173 if (length > NLM_MAXCOOKIELEN)
174 goto out_size;
175 p = xdr_inline_decode(xdr, length);
176 if (unlikely(p == NULL))
177 goto out_overflow;
178 cookie->len = length;
179 memcpy(cookie->data, p, length);
180 return 0;
181out_hpux:
182 cookie->len = 4;
183 memset(cookie->data, 0, 4);
184 return 0;
185out_size:
186 dprintk("NFS: returned cookie was too long: %u\n", length);
187 return -EIO;
188out_overflow:
189 print_overflow_msg(__func__, xdr);
190 return -EIO;
191}
192
193/*
194 * netobj fh;
195 */
196static void encode_fh(struct xdr_stream *xdr, const struct nfs_fh *fh)
197{
198 BUG_ON(fh->size != NFS2_FHSIZE);
199 encode_netobj(xdr, (u8 *)&fh->data, NFS2_FHSIZE);
200}
201
202/*
203 * enum nlm_stats {
204 * LCK_GRANTED = 0,
205 * LCK_DENIED = 1,
206 * LCK_DENIED_NOLOCKS = 2,
207 * LCK_BLOCKED = 3,
208 * LCK_DENIED_GRACE_PERIOD = 4
209 * };
210 *
211 *
212 * struct nlm_stat {
213 * nlm_stats stat;
214 * };
215 *
216 * NB: we don't swap bytes for the NLM status values. The upper
217 * layers deal directly with the status value in network byte
218 * order.
219 */
220
221static void encode_nlm_stat(struct xdr_stream *xdr,
222 const __be32 stat)
223{
224 __be32 *p;
225
226 BUG_ON(be32_to_cpu(stat) > NLM_LCK_DENIED_GRACE_PERIOD);
227 p = xdr_reserve_space(xdr, 4);
228 *p = stat;
229}
230
231static int decode_nlm_stat(struct xdr_stream *xdr,
232 __be32 *stat)
233{
234 __be32 *p;
235
236 p = xdr_inline_decode(xdr, 4);
237 if (unlikely(p == NULL))
238 goto out_overflow;
239 if (unlikely(*p > nlm_lck_denied_grace_period))
240 goto out_enum;
241 *stat = *p;
242 return 0;
243out_enum:
244 dprintk("%s: server returned invalid nlm_stats value: %u\n",
245 __func__, be32_to_cpup(p));
246 return -EIO;
247out_overflow:
248 print_overflow_msg(__func__, xdr);
249 return -EIO;
250}
251
252/*
253 * struct nlm_holder {
254 * bool exclusive;
255 * int uppid;
256 * netobj oh;
257 * unsigned l_offset;
258 * unsigned l_len;
259 * };
260 */
261static void encode_nlm_holder(struct xdr_stream *xdr,
262 const struct nlm_res *result)
263{
264 const struct nlm_lock *lock = &result->lock;
265 u32 l_offset, l_len;
266 __be32 *p;
267
268 encode_bool(xdr, lock->fl.fl_type == F_RDLCK);
269 encode_int32(xdr, lock->svid);
270 encode_netobj(xdr, lock->oh.data, lock->oh.len);
271
272 p = xdr_reserve_space(xdr, 4 + 4);
273 nlm_compute_offsets(lock, &l_offset, &l_len);
274 *p++ = cpu_to_be32(l_offset);
275 *p = cpu_to_be32(l_len);
276}
277
278static int decode_nlm_holder(struct xdr_stream *xdr, struct nlm_res *result)
279{
280 struct nlm_lock *lock = &result->lock;
281 struct file_lock *fl = &lock->fl;
282 u32 exclusive, l_offset, l_len;
283 int error;
284 __be32 *p;
285 s32 end;
286
287 memset(lock, 0, sizeof(*lock));
288 locks_init_lock(fl);
289
290 p = xdr_inline_decode(xdr, 4 + 4);
291 if (unlikely(p == NULL))
292 goto out_overflow;
293 exclusive = be32_to_cpup(p++);
294 lock->svid = be32_to_cpup(p);
295 fl->fl_pid = (pid_t)lock->svid;
296
297 error = decode_netobj(xdr, &lock->oh);
298 if (unlikely(error))
299 goto out;
300
301 p = xdr_inline_decode(xdr, 4 + 4);
302 if (unlikely(p == NULL))
303 goto out_overflow;
304
305 fl->fl_flags = FL_POSIX;
306 fl->fl_type = exclusive != 0 ? F_WRLCK : F_RDLCK;
307 l_offset = be32_to_cpup(p++);
308 l_len = be32_to_cpup(p);
309 end = l_offset + l_len - 1;
310
311 fl->fl_start = (loff_t)l_offset;
312 if (l_len == 0 || end < 0)
313 fl->fl_end = OFFSET_MAX;
314 else
315 fl->fl_end = (loff_t)end;
316 error = 0;
317out:
318 return error;
319out_overflow:
320 print_overflow_msg(__func__, xdr);
321 return -EIO;
322}
323
324/*
325 * string caller_name<LM_MAXSTRLEN>;
326 */
327static void encode_caller_name(struct xdr_stream *xdr, const char *name)
328{
329 /* NB: client-side does not set lock->len */
330 u32 length = strlen(name);
331 __be32 *p;
332
333 BUG_ON(length > NLM_MAXSTRLEN);
334 p = xdr_reserve_space(xdr, 4 + length);
335 xdr_encode_opaque(p, name, length);
336}
337
338/*
339 * struct nlm_lock {
340 * string caller_name<LM_MAXSTRLEN>;
341 * netobj fh;
342 * netobj oh;
343 * int uppid;
344 * unsigned l_offset;
345 * unsigned l_len;
346 * };
347 */
348static void encode_nlm_lock(struct xdr_stream *xdr,
349 const struct nlm_lock *lock)
350{
351 u32 l_offset, l_len;
352 __be32 *p;
353
354 encode_caller_name(xdr, lock->caller);
355 encode_fh(xdr, &lock->fh);
356 encode_netobj(xdr, lock->oh.data, lock->oh.len);
357
358 p = xdr_reserve_space(xdr, 4 + 4 + 4);
359 *p++ = cpu_to_be32(lock->svid);
360
361 nlm_compute_offsets(lock, &l_offset, &l_len);
362 *p++ = cpu_to_be32(l_offset);
363 *p = cpu_to_be32(l_len);
364}
365
366
367/*
368 * NLMv3 XDR encode functions
369 *
370 * NLMv3 argument types are defined in Chapter 10 of The Open Group's
371 * "Protocols for Interworking: XNFS, Version 3W".
372 */
373
374/*
375 * struct nlm_testargs {
376 * netobj cookie;
377 * bool exclusive;
378 * struct nlm_lock alock;
379 * };
380 */
381static int nlm_xdr_enc_testargs(struct rpc_rqst *req, __be32 *p,
382 const struct nlm_args *args)
383{
384 const struct nlm_lock *lock = &args->lock;
385 struct xdr_stream xdr;
386
387 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
388 encode_cookie(&xdr, &args->cookie);
389 encode_bool(&xdr, lock->fl.fl_type == F_WRLCK);
390 encode_nlm_lock(&xdr, lock);
391 return 0;
392}
393
394/*
395 * struct nlm_lockargs {
396 * netobj cookie;
397 * bool block;
398 * bool exclusive;
399 * struct nlm_lock alock;
400 * bool reclaim;
401 * int state;
402 * };
403 */
404static int nlm_xdr_enc_lockargs(struct rpc_rqst *req, __be32 *p,
405 const struct nlm_args *args)
406{
407 const struct nlm_lock *lock = &args->lock;
408 struct xdr_stream xdr;
409
410 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
411 encode_cookie(&xdr, &args->cookie);
412 encode_bool(&xdr, args->block);
413 encode_bool(&xdr, lock->fl.fl_type == F_WRLCK);
414 encode_nlm_lock(&xdr, lock);
415 encode_bool(&xdr, args->reclaim);
416 encode_int32(&xdr, args->state);
417 return 0;
418}
419
420/*
421 * struct nlm_cancargs {
422 * netobj cookie;
423 * bool block;
424 * bool exclusive;
425 * struct nlm_lock alock;
426 * };
427 */
428static int nlm_xdr_enc_cancargs(struct rpc_rqst *req, __be32 *p,
429 const struct nlm_args *args)
430{
431 const struct nlm_lock *lock = &args->lock;
432 struct xdr_stream xdr;
433
434 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
435 encode_cookie(&xdr, &args->cookie);
436 encode_bool(&xdr, args->block);
437 encode_bool(&xdr, lock->fl.fl_type == F_WRLCK);
438 encode_nlm_lock(&xdr, lock);
439 return 0;
440}
441
442/*
443 * struct nlm_unlockargs {
444 * netobj cookie;
445 * struct nlm_lock alock;
446 * };
447 */
448static int nlm_xdr_enc_unlockargs(struct rpc_rqst *req, __be32 *p,
449 const struct nlm_args *args)
450{
451 const struct nlm_lock *lock = &args->lock;
452 struct xdr_stream xdr;
453
454 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
455 encode_cookie(&xdr, &args->cookie);
456 encode_nlm_lock(&xdr, lock);
457 return 0;
458}
459
460/*
461 * struct nlm_res {
462 * netobj cookie;
463 * nlm_stat stat;
464 * };
465 */
466static int nlm_xdr_enc_res(struct rpc_rqst *req, __be32 *p,
467 const struct nlm_res *result)
468{
469 struct xdr_stream xdr;
470
471 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
472 encode_cookie(&xdr, &result->cookie);
473 encode_nlm_stat(&xdr, result->status);
474 return 0;
475}
476
477/*
478 * union nlm_testrply switch (nlm_stats stat) {
479 * case LCK_DENIED:
480 * struct nlm_holder holder;
481 * default:
482 * void;
483 * };
484 *
485 * struct nlm_testres {
486 * netobj cookie;
487 * nlm_testrply test_stat;
488 * };
489 */
490static void encode_nlm_testrply(struct xdr_stream *xdr,
491 const struct nlm_res *result)
492{
493 if (result->status == nlm_lck_denied)
494 encode_nlm_holder(xdr, result);
495}
496
497static int nlm_xdr_enc_testres(struct rpc_rqst *req, __be32 *p,
498 const struct nlm_res *result)
499{
500 struct xdr_stream xdr;
501
502 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
503 encode_cookie(&xdr, &result->cookie);
504 encode_nlm_stat(&xdr, result->status);
505 encode_nlm_testrply(&xdr, result);
506 return 0;
507}
508
509
510/*
511 * NLMv3 XDR decode functions
512 *
513 * NLMv3 result types are defined in Chapter 10 of The Open Group's
514 * "Protocols for Interworking: XNFS, Version 3W".
515 */
516
517/*
518 * union nlm_testrply switch (nlm_stats stat) {
519 * case LCK_DENIED:
520 * struct nlm_holder holder;
521 * default:
522 * void;
523 * };
524 *
525 * struct nlm_testres {
526 * netobj cookie;
527 * nlm_testrply test_stat;
528 * };
529 */
530static int decode_nlm_testrply(struct xdr_stream *xdr,
531 struct nlm_res *result)
532{
533 int error;
534
535 error = decode_nlm_stat(xdr, &result->status);
536 if (unlikely(error))
537 goto out;
538 if (result->status == nlm_lck_denied)
539 error = decode_nlm_holder(xdr, result);
540out:
541 return error;
542}
543
544static int nlm_xdr_dec_testres(struct rpc_rqst *req, __be32 *p,
545 struct nlm_res *result)
546{
547 struct xdr_stream xdr;
548 int error;
549
550 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
551 error = decode_cookie(&xdr, &result->cookie);
552 if (unlikely(error))
553 goto out;
554 error = decode_nlm_testrply(&xdr, result);
555out:
556 return error;
557}
558
559/*
560 * struct nlm_res {
561 * netobj cookie;
562 * nlm_stat stat;
563 * };
564 */
565static int nlm_xdr_dec_res(struct rpc_rqst *req, __be32 *p,
566 struct nlm_res *result)
567{
568 struct xdr_stream xdr;
569 int error;
570
571 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
572 error = decode_cookie(&xdr, &result->cookie);
573 if (unlikely(error))
574 goto out;
575 error = decode_nlm_stat(&xdr, &result->status);
576out:
577 return error;
578}
579
580
581/*
582 * For NLM, a void procedure really returns nothing
583 */
584#define nlm_xdr_dec_norep NULL
585
586#define PROC(proc, argtype, restype) \
587[NLMPROC_##proc] = { \
588 .p_proc = NLMPROC_##proc, \
589 .p_encode = (kxdrproc_t)nlm_xdr_enc_##argtype, \
590 .p_decode = (kxdrproc_t)nlm_xdr_dec_##restype, \
591 .p_arglen = NLM_##argtype##_sz, \
592 .p_replen = NLM_##restype##_sz, \
593 .p_statidx = NLMPROC_##proc, \
594 .p_name = #proc, \
595 }
596
597static struct rpc_procinfo nlm_procedures[] = {
598 PROC(TEST, testargs, testres),
599 PROC(LOCK, lockargs, res),
600 PROC(CANCEL, cancargs, res),
601 PROC(UNLOCK, unlockargs, res),
602 PROC(GRANTED, testargs, res),
603 PROC(TEST_MSG, testargs, norep),
604 PROC(LOCK_MSG, lockargs, norep),
605 PROC(CANCEL_MSG, cancargs, norep),
606 PROC(UNLOCK_MSG, unlockargs, norep),
607 PROC(GRANTED_MSG, testargs, norep),
608 PROC(TEST_RES, testres, norep),
609 PROC(LOCK_RES, res, norep),
610 PROC(CANCEL_RES, res, norep),
611 PROC(UNLOCK_RES, res, norep),
612 PROC(GRANTED_RES, res, norep),
613};
614
615static struct rpc_version nlm_version1 = {
616 .number = 1,
617 .nrprocs = ARRAY_SIZE(nlm_procedures),
618 .procs = nlm_procedures,
619};
620
621static struct rpc_version nlm_version3 = {
622 .number = 3,
623 .nrprocs = ARRAY_SIZE(nlm_procedures),
624 .procs = nlm_procedures,
625};
626
627static struct rpc_version *nlm_versions[] = {
628 [1] = &nlm_version1,
629 [3] = &nlm_version3,
630#ifdef CONFIG_LOCKD_V4
631 [4] = &nlm_version4,
632#endif
633};
634
635static struct rpc_stat nlm_rpc_stats;
636
637struct rpc_program nlm_program = {
638 .name = "lockd",
639 .number = NLM_PROGRAM,
640 .nrvers = ARRAY_SIZE(nlm_versions),
641 .version = nlm_versions,
642 .stats = &nlm_rpc_stats,
643};
diff --git a/fs/lockd/xdr.c b/fs/lockd/xdr.c
index b583ab0a4cbb..0eb694dc497b 100644
--- a/fs/lockd/xdr.c
+++ b/fs/lockd/xdr.c
@@ -149,37 +149,6 @@ nlm_decode_lock(__be32 *p, struct nlm_lock *lock)
149} 149}
150 150
151/* 151/*
152 * Encode a lock as part of an NLM call
153 */
154static __be32 *
155nlm_encode_lock(__be32 *p, struct nlm_lock *lock)
156{
157 struct file_lock *fl = &lock->fl;
158 __s32 start, len;
159
160 if (!(p = xdr_encode_string(p, lock->caller))
161 || !(p = nlm_encode_fh(p, &lock->fh))
162 || !(p = nlm_encode_oh(p, &lock->oh)))
163 return NULL;
164
165 if (fl->fl_start > NLM_OFFSET_MAX
166 || (fl->fl_end > NLM_OFFSET_MAX && fl->fl_end != OFFSET_MAX))
167 return NULL;
168
169 start = loff_t_to_s32(fl->fl_start);
170 if (fl->fl_end == OFFSET_MAX)
171 len = 0;
172 else
173 len = loff_t_to_s32(fl->fl_end - fl->fl_start + 1);
174
175 *p++ = htonl(lock->svid);
176 *p++ = htonl(start);
177 *p++ = htonl(len);
178
179 return p;
180}
181
182/*
183 * Encode result of a TEST/TEST_MSG call 152 * Encode result of a TEST/TEST_MSG call
184 */ 153 */
185static __be32 * 154static __be32 *
@@ -373,233 +342,6 @@ nlmsvc_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
373 return xdr_ressize_check(rqstp, p); 342 return xdr_ressize_check(rqstp, p);
374} 343}
375 344
376/*
377 * Now, the client side XDR functions
378 */
379#ifdef NLMCLNT_SUPPORT_SHARES
380static int
381nlmclt_decode_void(struct rpc_rqst *req, u32 *p, void *ptr)
382{
383 return 0;
384}
385#endif
386
387static int
388nlmclt_encode_testargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp)
389{
390 struct nlm_lock *lock = &argp->lock;
391
392 if (!(p = nlm_encode_cookie(p, &argp->cookie)))
393 return -EIO;
394 *p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero;
395 if (!(p = nlm_encode_lock(p, lock)))
396 return -EIO;
397 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
398 return 0;
399}
400
401static int
402nlmclt_decode_testres(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp)
403{
404 if (!(p = nlm_decode_cookie(p, &resp->cookie)))
405 return -EIO;
406 resp->status = *p++;
407 if (resp->status == nlm_lck_denied) {
408 struct file_lock *fl = &resp->lock.fl;
409 u32 excl;
410 s32 start, len, end;
411
412 memset(&resp->lock, 0, sizeof(resp->lock));
413 locks_init_lock(fl);
414 excl = ntohl(*p++);
415 resp->lock.svid = ntohl(*p++);
416 fl->fl_pid = (pid_t)resp->lock.svid;
417 if (!(p = nlm_decode_oh(p, &resp->lock.oh)))
418 return -EIO;
419
420 fl->fl_flags = FL_POSIX;
421 fl->fl_type = excl? F_WRLCK : F_RDLCK;
422 start = ntohl(*p++);
423 len = ntohl(*p++);
424 end = start + len - 1;
425
426 fl->fl_start = s32_to_loff_t(start);
427 if (len == 0 || end < 0)
428 fl->fl_end = OFFSET_MAX;
429 else
430 fl->fl_end = s32_to_loff_t(end);
431 }
432 return 0;
433}
434
435
436static int
437nlmclt_encode_lockargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp)
438{
439 struct nlm_lock *lock = &argp->lock;
440
441 if (!(p = nlm_encode_cookie(p, &argp->cookie)))
442 return -EIO;
443 *p++ = argp->block? xdr_one : xdr_zero;
444 *p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero;
445 if (!(p = nlm_encode_lock(p, lock)))
446 return -EIO;
447 *p++ = argp->reclaim? xdr_one : xdr_zero;
448 *p++ = htonl(argp->state);
449 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
450 return 0;
451}
452
453static int
454nlmclt_encode_cancargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp)
455{
456 struct nlm_lock *lock = &argp->lock;
457
458 if (!(p = nlm_encode_cookie(p, &argp->cookie)))
459 return -EIO;
460 *p++ = argp->block? xdr_one : xdr_zero;
461 *p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero;
462 if (!(p = nlm_encode_lock(p, lock)))
463 return -EIO;
464 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
465 return 0;
466}
467
468static int
469nlmclt_encode_unlockargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp)
470{
471 struct nlm_lock *lock = &argp->lock;
472
473 if (!(p = nlm_encode_cookie(p, &argp->cookie)))
474 return -EIO;
475 if (!(p = nlm_encode_lock(p, lock)))
476 return -EIO;
477 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
478 return 0;
479}
480
481static int
482nlmclt_encode_res(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp)
483{
484 if (!(p = nlm_encode_cookie(p, &resp->cookie)))
485 return -EIO;
486 *p++ = resp->status;
487 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
488 return 0;
489}
490
491static int
492nlmclt_encode_testres(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp)
493{
494 if (!(p = nlm_encode_testres(p, resp)))
495 return -EIO;
496 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
497 return 0;
498}
499
500static int
501nlmclt_decode_res(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp)
502{
503 if (!(p = nlm_decode_cookie(p, &resp->cookie)))
504 return -EIO;
505 resp->status = *p++;
506 return 0;
507}
508
509#if (NLMCLNT_OHSIZE > XDR_MAX_NETOBJ)
510# error "NLM host name cannot be larger than XDR_MAX_NETOBJ!"
511#endif
512
513/*
514 * Buffer requirements for NLM
515 */
516#define NLM_void_sz 0
517#define NLM_cookie_sz 1+XDR_QUADLEN(NLM_MAXCOOKIELEN)
518#define NLM_caller_sz 1+XDR_QUADLEN(NLMCLNT_OHSIZE)
519#define NLM_owner_sz 1+XDR_QUADLEN(NLMCLNT_OHSIZE)
520#define NLM_fhandle_sz 1+XDR_QUADLEN(NFS2_FHSIZE)
521#define NLM_lock_sz 3+NLM_caller_sz+NLM_owner_sz+NLM_fhandle_sz
522#define NLM_holder_sz 4+NLM_owner_sz
523
524#define NLM_testargs_sz NLM_cookie_sz+1+NLM_lock_sz
525#define NLM_lockargs_sz NLM_cookie_sz+4+NLM_lock_sz
526#define NLM_cancargs_sz NLM_cookie_sz+2+NLM_lock_sz
527#define NLM_unlockargs_sz NLM_cookie_sz+NLM_lock_sz
528
529#define NLM_testres_sz NLM_cookie_sz+1+NLM_holder_sz
530#define NLM_res_sz NLM_cookie_sz+1
531#define NLM_norep_sz 0
532
533/*
534 * For NLM, a void procedure really returns nothing
535 */
536#define nlmclt_decode_norep NULL
537
538#define PROC(proc, argtype, restype) \
539[NLMPROC_##proc] = { \
540 .p_proc = NLMPROC_##proc, \
541 .p_encode = (kxdrproc_t) nlmclt_encode_##argtype, \
542 .p_decode = (kxdrproc_t) nlmclt_decode_##restype, \
543 .p_arglen = NLM_##argtype##_sz, \
544 .p_replen = NLM_##restype##_sz, \
545 .p_statidx = NLMPROC_##proc, \
546 .p_name = #proc, \
547 }
548
549static struct rpc_procinfo nlm_procedures[] = {
550 PROC(TEST, testargs, testres),
551 PROC(LOCK, lockargs, res),
552 PROC(CANCEL, cancargs, res),
553 PROC(UNLOCK, unlockargs, res),
554 PROC(GRANTED, testargs, res),
555 PROC(TEST_MSG, testargs, norep),
556 PROC(LOCK_MSG, lockargs, norep),
557 PROC(CANCEL_MSG, cancargs, norep),
558 PROC(UNLOCK_MSG, unlockargs, norep),
559 PROC(GRANTED_MSG, testargs, norep),
560 PROC(TEST_RES, testres, norep),
561 PROC(LOCK_RES, res, norep),
562 PROC(CANCEL_RES, res, norep),
563 PROC(UNLOCK_RES, res, norep),
564 PROC(GRANTED_RES, res, norep),
565#ifdef NLMCLNT_SUPPORT_SHARES
566 PROC(SHARE, shareargs, shareres),
567 PROC(UNSHARE, shareargs, shareres),
568 PROC(NM_LOCK, lockargs, res),
569 PROC(FREE_ALL, notify, void),
570#endif
571};
572
573static struct rpc_version nlm_version1 = {
574 .number = 1,
575 .nrprocs = 16,
576 .procs = nlm_procedures,
577};
578
579static struct rpc_version nlm_version3 = {
580 .number = 3,
581 .nrprocs = 24,
582 .procs = nlm_procedures,
583};
584
585static struct rpc_version * nlm_versions[] = {
586 [1] = &nlm_version1,
587 [3] = &nlm_version3,
588#ifdef CONFIG_LOCKD_V4
589 [4] = &nlm_version4,
590#endif
591};
592
593static struct rpc_stat nlm_stats;
594
595struct rpc_program nlm_program = {
596 .name = "lockd",
597 .number = NLM_PROGRAM,
598 .nrvers = ARRAY_SIZE(nlm_versions),
599 .version = nlm_versions,
600 .stats = &nlm_stats,
601};
602
603#ifdef RPC_DEBUG 345#ifdef RPC_DEBUG
604const char *nlmdbg_cookie2a(const struct nlm_cookie *cookie) 346const char *nlmdbg_cookie2a(const struct nlm_cookie *cookie)
605{ 347{
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-20 19:17:51 -0500