This source file includes following definitions.
- s64_to_loff_t
- loff_t_to_s64
- nlm4_decode_cookie
- nlm4_encode_cookie
- nlm4_decode_fh
- nlm4_decode_oh
- nlm4_decode_lock
- nlm4_encode_testres
- nlm4svc_decode_testargs
- nlm4svc_encode_testres
- nlm4svc_decode_lockargs
- nlm4svc_decode_cancargs
- nlm4svc_decode_unlockargs
- nlm4svc_decode_shareargs
- nlm4svc_encode_shareres
- nlm4svc_encode_res
- nlm4svc_decode_notify
- nlm4svc_decode_reboot
- nlm4svc_decode_res
- nlm4svc_decode_void
- nlm4svc_encode_void
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11 #include <linux/types.h>
12 #include <linux/sched.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
21 #define NLMDBG_FACILITY NLMDBG_XDR
22
23 static inline loff_t
24 s64_to_loff_t(__s64 offset)
25 {
26 return (loff_t)offset;
27 }
28
29
30 static inline s64
31 loff_t_to_s64(loff_t offset)
32 {
33 s64 res;
34 if (offset > NLM4_OFFSET_MAX)
35 res = NLM4_OFFSET_MAX;
36 else if (offset < -NLM4_OFFSET_MAX)
37 res = -NLM4_OFFSET_MAX;
38 else
39 res = offset;
40 return res;
41 }
42
43
44
45
46 static __be32 *
47 nlm4_decode_cookie(__be32 *p, struct nlm_cookie *c)
48 {
49 unsigned int len;
50
51 len = ntohl(*p++);
52
53 if(len==0)
54 {
55 c->len=4;
56 memset(c->data, 0, 4);
57 }
58 else if(len<=NLM_MAXCOOKIELEN)
59 {
60 c->len=len;
61 memcpy(c->data, p, len);
62 p+=XDR_QUADLEN(len);
63 }
64 else
65 {
66 dprintk("lockd: bad cookie size %d (only cookies under "
67 "%d bytes are supported.)\n",
68 len, NLM_MAXCOOKIELEN);
69 return NULL;
70 }
71 return p;
72 }
73
74 static __be32 *
75 nlm4_encode_cookie(__be32 *p, struct nlm_cookie *c)
76 {
77 *p++ = htonl(c->len);
78 memcpy(p, c->data, c->len);
79 p+=XDR_QUADLEN(c->len);
80 return p;
81 }
82
83 static __be32 *
84 nlm4_decode_fh(__be32 *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 dprintk("lockd: bad fhandle size %d (should be <=%d)\n",
90 f->size, NFS_MAXFHSIZE);
91 return NULL;
92 }
93 memcpy(f->data, p, f->size);
94 return p + XDR_QUADLEN(f->size);
95 }
96
97
98
99
100 static __be32 *
101 nlm4_decode_oh(__be32 *p, struct xdr_netobj *oh)
102 {
103 return xdr_decode_netobj(p, oh);
104 }
105
106 static __be32 *
107 nlm4_decode_lock(__be32 *p, struct nlm_lock *lock)
108 {
109 struct file_lock *fl = &lock->fl;
110 __u64 len, start;
111 __s64 end;
112
113 if (!(p = xdr_decode_string_inplace(p, &lock->caller,
114 &lock->len, NLM_MAXSTRLEN))
115 || !(p = nlm4_decode_fh(p, &lock->fh))
116 || !(p = nlm4_decode_oh(p, &lock->oh)))
117 return NULL;
118 lock->svid = ntohl(*p++);
119
120 locks_init_lock(fl);
121 fl->fl_flags = FL_POSIX;
122 fl->fl_type = F_RDLCK;
123 p = xdr_decode_hyper(p, &start);
124 p = xdr_decode_hyper(p, &len);
125 end = start + len - 1;
126
127 fl->fl_start = s64_to_loff_t(start);
128
129 if (len == 0 || end < 0)
130 fl->fl_end = OFFSET_MAX;
131 else
132 fl->fl_end = s64_to_loff_t(end);
133 return p;
134 }
135
136
137
138
139 static __be32 *
140 nlm4_encode_testres(__be32 *p, struct nlm_res *resp)
141 {
142 s64 start, len;
143
144 dprintk("xdr: before encode_testres (p %p resp %p)\n", p, resp);
145 if (!(p = nlm4_encode_cookie(p, &resp->cookie)))
146 return NULL;
147 *p++ = resp->status;
148
149 if (resp->status == nlm_lck_denied) {
150 struct file_lock *fl = &resp->lock.fl;
151
152 *p++ = (fl->fl_type == F_RDLCK)? xdr_zero : xdr_one;
153 *p++ = htonl(resp->lock.svid);
154
155
156 if (!(p = xdr_encode_netobj(p, &resp->lock.oh)))
157 return NULL;
158
159 start = loff_t_to_s64(fl->fl_start);
160 if (fl->fl_end == OFFSET_MAX)
161 len = 0;
162 else
163 len = loff_t_to_s64(fl->fl_end - fl->fl_start + 1);
164
165 p = xdr_encode_hyper(p, start);
166 p = xdr_encode_hyper(p, len);
167 dprintk("xdr: encode_testres (status %u pid %d type %d start %Ld end %Ld)\n",
168 resp->status, (int)resp->lock.svid, fl->fl_type,
169 (long long)fl->fl_start, (long long)fl->fl_end);
170 }
171
172 dprintk("xdr: after encode_testres (p %p resp %p)\n", p, resp);
173 return p;
174 }
175
176
177
178
179
180 int
181 nlm4svc_decode_testargs(struct svc_rqst *rqstp, __be32 *p)
182 {
183 struct nlm_args *argp = rqstp->rq_argp;
184 u32 exclusive;
185
186 if (!(p = nlm4_decode_cookie(p, &argp->cookie)))
187 return 0;
188
189 exclusive = ntohl(*p++);
190 if (!(p = nlm4_decode_lock(p, &argp->lock)))
191 return 0;
192 if (exclusive)
193 argp->lock.fl.fl_type = F_WRLCK;
194
195 return xdr_argsize_check(rqstp, p);
196 }
197
198 int
199 nlm4svc_encode_testres(struct svc_rqst *rqstp, __be32 *p)
200 {
201 struct nlm_res *resp = rqstp->rq_resp;
202
203 if (!(p = nlm4_encode_testres(p, resp)))
204 return 0;
205 return xdr_ressize_check(rqstp, p);
206 }
207
208 int
209 nlm4svc_decode_lockargs(struct svc_rqst *rqstp, __be32 *p)
210 {
211 struct nlm_args *argp = rqstp->rq_argp;
212 u32 exclusive;
213
214 if (!(p = nlm4_decode_cookie(p, &argp->cookie)))
215 return 0;
216 argp->block = ntohl(*p++);
217 exclusive = ntohl(*p++);
218 if (!(p = nlm4_decode_lock(p, &argp->lock)))
219 return 0;
220 if (exclusive)
221 argp->lock.fl.fl_type = F_WRLCK;
222 argp->reclaim = ntohl(*p++);
223 argp->state = ntohl(*p++);
224 argp->monitor = 1;
225
226 return xdr_argsize_check(rqstp, p);
227 }
228
229 int
230 nlm4svc_decode_cancargs(struct svc_rqst *rqstp, __be32 *p)
231 {
232 struct nlm_args *argp = rqstp->rq_argp;
233 u32 exclusive;
234
235 if (!(p = nlm4_decode_cookie(p, &argp->cookie)))
236 return 0;
237 argp->block = ntohl(*p++);
238 exclusive = ntohl(*p++);
239 if (!(p = nlm4_decode_lock(p, &argp->lock)))
240 return 0;
241 if (exclusive)
242 argp->lock.fl.fl_type = F_WRLCK;
243 return xdr_argsize_check(rqstp, p);
244 }
245
246 int
247 nlm4svc_decode_unlockargs(struct svc_rqst *rqstp, __be32 *p)
248 {
249 struct nlm_args *argp = rqstp->rq_argp;
250
251 if (!(p = nlm4_decode_cookie(p, &argp->cookie))
252 || !(p = nlm4_decode_lock(p, &argp->lock)))
253 return 0;
254 argp->lock.fl.fl_type = F_UNLCK;
255 return xdr_argsize_check(rqstp, p);
256 }
257
258 int
259 nlm4svc_decode_shareargs(struct svc_rqst *rqstp, __be32 *p)
260 {
261 struct nlm_args *argp = rqstp->rq_argp;
262 struct nlm_lock *lock = &argp->lock;
263
264 memset(lock, 0, sizeof(*lock));
265 locks_init_lock(&lock->fl);
266 lock->svid = ~(u32) 0;
267
268 if (!(p = nlm4_decode_cookie(p, &argp->cookie))
269 || !(p = xdr_decode_string_inplace(p, &lock->caller,
270 &lock->len, NLM_MAXSTRLEN))
271 || !(p = nlm4_decode_fh(p, &lock->fh))
272 || !(p = nlm4_decode_oh(p, &lock->oh)))
273 return 0;
274 argp->fsm_mode = ntohl(*p++);
275 argp->fsm_access = ntohl(*p++);
276 return xdr_argsize_check(rqstp, p);
277 }
278
279 int
280 nlm4svc_encode_shareres(struct svc_rqst *rqstp, __be32 *p)
281 {
282 struct nlm_res *resp = rqstp->rq_resp;
283
284 if (!(p = nlm4_encode_cookie(p, &resp->cookie)))
285 return 0;
286 *p++ = resp->status;
287 *p++ = xdr_zero;
288 return xdr_ressize_check(rqstp, p);
289 }
290
291 int
292 nlm4svc_encode_res(struct svc_rqst *rqstp, __be32 *p)
293 {
294 struct nlm_res *resp = rqstp->rq_resp;
295
296 if (!(p = nlm4_encode_cookie(p, &resp->cookie)))
297 return 0;
298 *p++ = resp->status;
299 return xdr_ressize_check(rqstp, p);
300 }
301
302 int
303 nlm4svc_decode_notify(struct svc_rqst *rqstp, __be32 *p)
304 {
305 struct nlm_args *argp = rqstp->rq_argp;
306 struct nlm_lock *lock = &argp->lock;
307
308 if (!(p = xdr_decode_string_inplace(p, &lock->caller,
309 &lock->len, NLM_MAXSTRLEN)))
310 return 0;
311 argp->state = ntohl(*p++);
312 return xdr_argsize_check(rqstp, p);
313 }
314
315 int
316 nlm4svc_decode_reboot(struct svc_rqst *rqstp, __be32 *p)
317 {
318 struct nlm_reboot *argp = rqstp->rq_argp;
319
320 if (!(p = xdr_decode_string_inplace(p, &argp->mon, &argp->len, SM_MAXSTRLEN)))
321 return 0;
322 argp->state = ntohl(*p++);
323 memcpy(&argp->priv.data, p, sizeof(argp->priv.data));
324 p += XDR_QUADLEN(SM_PRIV_SIZE);
325 return xdr_argsize_check(rqstp, p);
326 }
327
328 int
329 nlm4svc_decode_res(struct svc_rqst *rqstp, __be32 *p)
330 {
331 struct nlm_res *resp = rqstp->rq_argp;
332
333 if (!(p = nlm4_decode_cookie(p, &resp->cookie)))
334 return 0;
335 resp->status = *p++;
336 return xdr_argsize_check(rqstp, p);
337 }
338
339 int
340 nlm4svc_decode_void(struct svc_rqst *rqstp, __be32 *p)
341 {
342 return xdr_argsize_check(rqstp, p);
343 }
344
345 int
346 nlm4svc_encode_void(struct svc_rqst *rqstp, __be32 *p)
347 {
348 return xdr_ressize_check(rqstp, p);
349 }