4 * XDR support for lockd and the lock client.
9 #include <linux/types.h>
10 #include <linux/sched.h>
11 #include <linux/nfs.h>
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>
19 #define NLMDBG_FACILITY NLMDBG_XDR
23 s32_to_loff_t(__s32 offset)
25 return (loff_t)offset;
29 loff_t_to_s32(loff_t offset)
32 if (offset >= NLM_OFFSET_MAX)
34 else if (offset <= -NLM_OFFSET_MAX)
35 res = -NLM_OFFSET_MAX;
42 * XDR functions for basic NLM types
44 static __be32 *nlm_decode_cookie(__be32 *p, struct nlm_cookie *c)
53 memset(c->data, 0, 4); /* hockeypux brain damage */
55 else if(len<=NLM_MAXCOOKIELEN)
58 memcpy(c->data, p, len);
63 dprintk("lockd: bad cookie size %d (only cookies under "
64 "%d bytes are supported.)\n",
65 len, NLM_MAXCOOKIELEN);
71 static inline __be32 *
72 nlm_encode_cookie(__be32 *p, struct nlm_cookie *c)
75 memcpy(p, c->data, c->len);
76 p+=XDR_QUADLEN(c->len);
81 nlm_decode_fh(__be32 *p, struct nfs_fh *f)
85 if ((len = ntohl(*p++)) != NFS2_FHSIZE) {
86 dprintk("lockd: bad fhandle size %d (should be %d)\n",
90 f->size = NFS2_FHSIZE;
91 memset(f->data, 0, sizeof(f->data));
92 memcpy(f->data, p, NFS2_FHSIZE);
93 return p + XDR_QUADLEN(NFS2_FHSIZE);
96 static inline __be32 *
97 nlm_encode_fh(__be32 *p, struct nfs_fh *f)
99 *p++ = htonl(NFS2_FHSIZE);
100 memcpy(p, f->data, NFS2_FHSIZE);
101 return p + XDR_QUADLEN(NFS2_FHSIZE);
105 * Encode and decode owner handle
107 static inline __be32 *
108 nlm_decode_oh(__be32 *p, struct xdr_netobj *oh)
110 return xdr_decode_netobj(p, oh);
113 static inline __be32 *
114 nlm_encode_oh(__be32 *p, struct xdr_netobj *oh)
116 return xdr_encode_netobj(p, oh);
120 nlm_decode_lock(__be32 *p, struct nlm_lock *lock)
122 struct file_lock *fl = &lock->fl;
125 if (!(p = xdr_decode_string_inplace(p, &lock->caller,
128 || !(p = nlm_decode_fh(p, &lock->fh))
129 || !(p = nlm_decode_oh(p, &lock->oh)))
131 lock->svid = ntohl(*p++);
134 fl->fl_owner = current->files;
135 fl->fl_pid = (pid_t)lock->svid;
136 fl->fl_flags = FL_POSIX;
137 fl->fl_type = F_RDLCK; /* as good as anything else */
140 end = start + len - 1;
142 fl->fl_start = s32_to_loff_t(start);
144 if (len == 0 || end < 0)
145 fl->fl_end = OFFSET_MAX;
147 fl->fl_end = s32_to_loff_t(end);
152 * Encode result of a TEST/TEST_MSG call
155 nlm_encode_testres(__be32 *p, struct nlm_res *resp)
159 if (!(p = nlm_encode_cookie(p, &resp->cookie)))
163 if (resp->status == nlm_lck_denied) {
164 struct file_lock *fl = &resp->lock.fl;
166 *p++ = (fl->fl_type == F_RDLCK)? xdr_zero : xdr_one;
167 *p++ = htonl(resp->lock.svid);
169 /* Encode owner handle. */
170 if (!(p = xdr_encode_netobj(p, &resp->lock.oh)))
173 start = loff_t_to_s32(fl->fl_start);
174 if (fl->fl_end == OFFSET_MAX)
177 len = loff_t_to_s32(fl->fl_end - fl->fl_start + 1);
188 * First, the server side XDR functions
191 nlmsvc_decode_testargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp)
195 if (!(p = nlm_decode_cookie(p, &argp->cookie)))
198 exclusive = ntohl(*p++);
199 if (!(p = nlm_decode_lock(p, &argp->lock)))
202 argp->lock.fl.fl_type = F_WRLCK;
204 return xdr_argsize_check(rqstp, p);
208 nlmsvc_encode_testres(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp)
210 if (!(p = nlm_encode_testres(p, resp)))
212 return xdr_ressize_check(rqstp, p);
216 nlmsvc_decode_lockargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp)
220 if (!(p = nlm_decode_cookie(p, &argp->cookie)))
222 argp->block = ntohl(*p++);
223 exclusive = ntohl(*p++);
224 if (!(p = nlm_decode_lock(p, &argp->lock)))
227 argp->lock.fl.fl_type = F_WRLCK;
228 argp->reclaim = ntohl(*p++);
229 argp->state = ntohl(*p++);
230 argp->monitor = 1; /* monitor client by default */
232 return xdr_argsize_check(rqstp, p);
236 nlmsvc_decode_cancargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp)
240 if (!(p = nlm_decode_cookie(p, &argp->cookie)))
242 argp->block = ntohl(*p++);
243 exclusive = ntohl(*p++);
244 if (!(p = nlm_decode_lock(p, &argp->lock)))
247 argp->lock.fl.fl_type = F_WRLCK;
248 return xdr_argsize_check(rqstp, p);
252 nlmsvc_decode_unlockargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp)
254 if (!(p = nlm_decode_cookie(p, &argp->cookie))
255 || !(p = nlm_decode_lock(p, &argp->lock)))
257 argp->lock.fl.fl_type = F_UNLCK;
258 return xdr_argsize_check(rqstp, p);
262 nlmsvc_decode_shareargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp)
264 struct nlm_lock *lock = &argp->lock;
266 memset(lock, 0, sizeof(*lock));
267 locks_init_lock(&lock->fl);
268 lock->svid = ~(u32) 0;
269 lock->fl.fl_pid = (pid_t)lock->svid;
271 if (!(p = nlm_decode_cookie(p, &argp->cookie))
272 || !(p = xdr_decode_string_inplace(p, &lock->caller,
273 &lock->len, NLM_MAXSTRLEN))
274 || !(p = nlm_decode_fh(p, &lock->fh))
275 || !(p = nlm_decode_oh(p, &lock->oh)))
277 argp->fsm_mode = ntohl(*p++);
278 argp->fsm_access = ntohl(*p++);
279 return xdr_argsize_check(rqstp, p);
283 nlmsvc_encode_shareres(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp)
285 if (!(p = nlm_encode_cookie(p, &resp->cookie)))
288 *p++ = xdr_zero; /* sequence argument */
289 return xdr_ressize_check(rqstp, p);
293 nlmsvc_encode_res(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp)
295 if (!(p = nlm_encode_cookie(p, &resp->cookie)))
298 return xdr_ressize_check(rqstp, p);
302 nlmsvc_decode_notify(struct svc_rqst *rqstp, __be32 *p, struct nlm_args *argp)
304 struct nlm_lock *lock = &argp->lock;
306 if (!(p = xdr_decode_string_inplace(p, &lock->caller,
307 &lock->len, NLM_MAXSTRLEN)))
309 argp->state = ntohl(*p++);
310 return xdr_argsize_check(rqstp, p);
314 nlmsvc_decode_reboot(struct svc_rqst *rqstp, __be32 *p, struct nlm_reboot *argp)
316 if (!(p = xdr_decode_string_inplace(p, &argp->mon, &argp->len, SM_MAXSTRLEN)))
318 argp->state = ntohl(*p++);
319 memcpy(&argp->priv.data, p, sizeof(argp->priv.data));
320 p += XDR_QUADLEN(SM_PRIV_SIZE);
321 return xdr_argsize_check(rqstp, p);
325 nlmsvc_decode_res(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp)
327 if (!(p = nlm_decode_cookie(p, &resp->cookie)))
330 return xdr_argsize_check(rqstp, p);
334 nlmsvc_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
336 return xdr_argsize_check(rqstp, p);
340 nlmsvc_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
342 return xdr_ressize_check(rqstp, p);