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9#include <linux/types.h>
10#include <linux/sched.h>
11#include <linux/nfs.h>
12
13#include <linux/sunrpc/xdr.h>
14#include <linux/sunrpc/clnt.h>
15#include <linux/sunrpc/svc.h>
16#include <linux/sunrpc/stats.h>
17#include <linux/lockd/lockd.h>
18
19#include <uapi/linux/nfs2.h>
20
21#define NLMDBG_FACILITY NLMDBG_XDR
22
23
24static inline loff_t
25s32_to_loff_t(__s32 offset)
26{
27 return (loff_t)offset;
28}
29
30static inline __s32
31loff_t_to_s32(loff_t offset)
32{
33 __s32 res;
34 if (offset >= NLM_OFFSET_MAX)
35 res = NLM_OFFSET_MAX;
36 else if (offset <= -NLM_OFFSET_MAX)
37 res = -NLM_OFFSET_MAX;
38 else
39 res = offset;
40 return res;
41}
42
43
44
45
46static __be32 *nlm_decode_cookie(__be32 *p, struct nlm_cookie *c)
47{
48 unsigned int len;
49
50 len = ntohl(*p++);
51
52 if(len==0)
53 {
54 c->len=4;
55 memset(c->data, 0, 4);
56 }
57 else if(len<=NLM_MAXCOOKIELEN)
58 {
59 c->len=len;
60 memcpy(c->data, p, len);
61 p+=XDR_QUADLEN(len);
62 }
63 else
64 {
65 dprintk("lockd: bad cookie size %d (only cookies under "
66 "%d bytes are supported.)\n",
67 len, NLM_MAXCOOKIELEN);
68 return NULL;
69 }
70 return p;
71}
72
73static inline __be32 *
74nlm_encode_cookie(__be32 *p, struct nlm_cookie *c)
75{
76 *p++ = htonl(c->len);
77 memcpy(p, c->data, c->len);
78 p+=XDR_QUADLEN(c->len);
79 return p;
80}
81
82static __be32 *
83nlm_decode_fh(__be32 *p, struct nfs_fh *f)
84{
85 unsigned int len;
86
87 if ((len = ntohl(*p++)) != NFS2_FHSIZE) {
88 dprintk("lockd: bad fhandle size %d (should be %d)\n",
89 len, NFS2_FHSIZE);
90 return NULL;
91 }
92 f->size = NFS2_FHSIZE;
93 memset(f->data, 0, sizeof(f->data));
94 memcpy(f->data, p, NFS2_FHSIZE);
95 return p + XDR_QUADLEN(NFS2_FHSIZE);
96}
97
98static inline __be32 *
99nlm_encode_fh(__be32 *p, struct nfs_fh *f)
100{
101 *p++ = htonl(NFS2_FHSIZE);
102 memcpy(p, f->data, NFS2_FHSIZE);
103 return p + XDR_QUADLEN(NFS2_FHSIZE);
104}
105
106
107
108
109static inline __be32 *
110nlm_decode_oh(__be32 *p, struct xdr_netobj *oh)
111{
112 return xdr_decode_netobj(p, oh);
113}
114
115static inline __be32 *
116nlm_encode_oh(__be32 *p, struct xdr_netobj *oh)
117{
118 return xdr_encode_netobj(p, oh);
119}
120
121static __be32 *
122nlm_decode_lock(__be32 *p, struct nlm_lock *lock)
123{
124 struct file_lock *fl = &lock->fl;
125 s32 start, len, end;
126
127 if (!(p = xdr_decode_string_inplace(p, &lock->caller,
128 &lock->len,
129 NLM_MAXSTRLEN))
130 || !(p = nlm_decode_fh(p, &lock->fh))
131 || !(p = nlm_decode_oh(p, &lock->oh)))
132 return NULL;
133 lock->svid = ntohl(*p++);
134
135 locks_init_lock(fl);
136 fl->fl_owner = current->files;
137 fl->fl_pid = (pid_t)lock->svid;
138 fl->fl_flags = FL_POSIX;
139 fl->fl_type = F_RDLCK;
140 start = ntohl(*p++);
141 len = ntohl(*p++);
142 end = start + len - 1;
143
144 fl->fl_start = s32_to_loff_t(start);
145
146 if (len == 0 || end < 0)
147 fl->fl_end = OFFSET_MAX;
148 else
149 fl->fl_end = s32_to_loff_t(end);
150 return p;
151}
152
153
154
155
156static __be32 *
157nlm_encode_testres(__be32 *p, struct nlm_res *resp)
158{
159 s32 start, len;
160
161 if (!(p = nlm_encode_cookie(p, &resp->cookie)))
162 return NULL;
163 *p++ = resp->status;
164
165 if (resp->status == nlm_lck_denied) {
166 struct file_lock *fl = &resp->lock.fl;
167
168 *p++ = (fl->fl_type == F_RDLCK)? xdr_zero : xdr_one;
169 *p++ = htonl(resp->lock.svid);
170
171
172 if (!(p = xdr_encode_netobj(p, &resp->lock.oh)))
173 return NULL;
174
175 start = loff_t_to_s32(fl->fl_start);
176 if (fl->fl_end == OFFSET_MAX)
177 len = 0;
178 else
179 len = loff_t_to_s32(fl->fl_end - fl->fl_start + 1);
180
181 *p++ = htonl(start);
182 *p++ = htonl(len);
183 }
184
185 return p;
186}
187
188
189
190
191
192int
193nlmsvc_decode_testargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp)
194{
195 u32 exclusive;
196
197 if (!(p = nlm_decode_cookie(p, &argp->cookie)))
198 return 0;
199
200 exclusive = ntohl(*p++);
201 if (!(p = nlm_decode_lock(p, &argp->lock)))
202 return 0;
203 if (exclusive)
204 argp->lock.fl.fl_type = F_WRLCK;
205
206 return xdr_argsize_check(rqstp, p);
207}
208
209int
210nlmsvc_encode_testres(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp)
211{
212 if (!(p = nlm_encode_testres(p, resp)))
213 return 0;
214 return xdr_ressize_check(rqstp, p);
215}
216
217int
218nlmsvc_decode_lockargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp)
219{
220 u32 exclusive;
221
222 if (!(p = nlm_decode_cookie(p, &argp->cookie)))
223 return 0;
224 argp->block = ntohl(*p++);
225 exclusive = ntohl(*p++);
226 if (!(p = nlm_decode_lock(p, &argp->lock)))
227 return 0;
228 if (exclusive)
229 argp->lock.fl.fl_type = F_WRLCK;
230 argp->reclaim = ntohl(*p++);
231 argp->state = ntohl(*p++);
232 argp->monitor = 1;
233
234 return xdr_argsize_check(rqstp, p);
235}
236
237int
238nlmsvc_decode_cancargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp)
239{
240 u32 exclusive;
241
242 if (!(p = nlm_decode_cookie(p, &argp->cookie)))
243 return 0;
244 argp->block = ntohl(*p++);
245 exclusive = ntohl(*p++);
246 if (!(p = nlm_decode_lock(p, &argp->lock)))
247 return 0;
248 if (exclusive)
249 argp->lock.fl.fl_type = F_WRLCK;
250 return xdr_argsize_check(rqstp, p);
251}
252
253int
254nlmsvc_decode_unlockargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp)
255{
256 if (!(p = nlm_decode_cookie(p, &argp->cookie))
257 || !(p = nlm_decode_lock(p, &argp->lock)))
258 return 0;
259 argp->lock.fl.fl_type = F_UNLCK;
260 return xdr_argsize_check(rqstp, p);
261}
262
263int
264nlmsvc_decode_shareargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp)
265{
266 struct nlm_lock *lock = &argp->lock;
267
268 memset(lock, 0, sizeof(*lock));
269 locks_init_lock(&lock->fl);
270 lock->svid = ~(u32) 0;
271 lock->fl.fl_pid = (pid_t)lock->svid;
272
273 if (!(p = nlm_decode_cookie(p, &argp->cookie))
274 || !(p = xdr_decode_string_inplace(p, &lock->caller,
275 &lock->len, NLM_MAXSTRLEN))
276 || !(p = nlm_decode_fh(p, &lock->fh))
277 || !(p = nlm_decode_oh(p, &lock->oh)))
278 return 0;
279 argp->fsm_mode = ntohl(*p++);
280 argp->fsm_access = ntohl(*p++);
281 return xdr_argsize_check(rqstp, p);
282}
283
284int
285nlmsvc_encode_shareres(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp)
286{
287 if (!(p = nlm_encode_cookie(p, &resp->cookie)))
288 return 0;
289 *p++ = resp->status;
290 *p++ = xdr_zero;
291 return xdr_ressize_check(rqstp, p);
292}
293
294int
295nlmsvc_encode_res(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp)
296{
297 if (!(p = nlm_encode_cookie(p, &resp->cookie)))
298 return 0;
299 *p++ = resp->status;
300 return xdr_ressize_check(rqstp, p);
301}
302
303int
304nlmsvc_decode_notify(struct svc_rqst *rqstp, __be32 *p, struct nlm_args *argp)
305{
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
315int
316nlmsvc_decode_reboot(struct svc_rqst *rqstp, __be32 *p, struct nlm_reboot *argp)
317{
318 if (!(p = xdr_decode_string_inplace(p, &argp->mon, &argp->len, SM_MAXSTRLEN)))
319 return 0;
320 argp->state = ntohl(*p++);
321 memcpy(&argp->priv.data, p, sizeof(argp->priv.data));
322 p += XDR_QUADLEN(SM_PRIV_SIZE);
323 return xdr_argsize_check(rqstp, p);
324}
325
326int
327nlmsvc_decode_res(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp)
328{
329 if (!(p = nlm_decode_cookie(p, &resp->cookie)))
330 return 0;
331 resp->status = *p++;
332 return xdr_argsize_check(rqstp, p);
333}
334
335int
336nlmsvc_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
337{
338 return xdr_argsize_check(rqstp, p);
339}
340
341int
342nlmsvc_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
343{
344 return xdr_ressize_check(rqstp, p);
345}
346
