2 * linux/fs/lockd/xdr4.c
4 * XDR support for lockd and the lock client.
6 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
7 * Copyright (C) 1999, Trond Myklebust <trond.myklebust@fys.uio.no>
10 #include <linux/types.h>
11 #include <linux/sched.h>
12 #include <linux/nfs.h>
14 #include <linux/sunrpc/xdr.h>
15 #include <linux/sunrpc/clnt.h>
16 #include <linux/sunrpc/svc.h>
17 #include <linux/sunrpc/stats.h>
18 #include <linux/lockd/lockd.h>
20 #define NLMDBG_FACILITY NLMDBG_XDR
23 s64_to_loff_t(__s64 offset)
25 return (loff_t)offset;
30 loff_t_to_s64(loff_t offset)
33 if (offset > NLM4_OFFSET_MAX)
34 res = NLM4_OFFSET_MAX;
35 else if (offset < -NLM4_OFFSET_MAX)
36 res = -NLM4_OFFSET_MAX;
43 * XDR functions for basic NLM types
46 nlm4_decode_cookie(__be32 *p, struct nlm_cookie *c)
55 memset(c->data, 0, 4); /* hockeypux brain damage */
57 else if(len<=NLM_MAXCOOKIELEN)
60 memcpy(c->data, p, len);
65 dprintk("lockd: bad cookie size %d (only cookies under "
66 "%d bytes are supported.)\n",
67 len, NLM_MAXCOOKIELEN);
74 nlm4_encode_cookie(__be32 *p, struct nlm_cookie *c)
77 memcpy(p, c->data, c->len);
78 p+=XDR_QUADLEN(c->len);
83 nlm4_decode_fh(__be32 *p, struct nfs_fh *f)
85 memset(f->data, 0, sizeof(f->data));
86 f->size = ntohl(*p++);
87 if (f->size > NFS_MAXFHSIZE) {
88 dprintk("lockd: bad fhandle size %d (should be <=%d)\n",
89 f->size, NFS_MAXFHSIZE);
92 memcpy(f->data, p, f->size);
93 return p + XDR_QUADLEN(f->size);
97 * Encode and decode owner handle
100 nlm4_decode_oh(__be32 *p, struct xdr_netobj *oh)
102 return xdr_decode_netobj(p, oh);
106 nlm4_decode_lock(__be32 *p, struct nlm_lock *lock)
108 struct file_lock *fl = &lock->fl;
112 if (!(p = xdr_decode_string_inplace(p, &lock->caller,
113 &lock->len, NLM_MAXSTRLEN))
114 || !(p = nlm4_decode_fh(p, &lock->fh))
115 || !(p = nlm4_decode_oh(p, &lock->oh)))
117 lock->svid = ntohl(*p++);
120 fl->fl_owner = current->files;
121 fl->fl_pid = (pid_t)lock->svid;
122 fl->fl_flags = FL_POSIX;
123 fl->fl_type = F_RDLCK; /* as good as anything else */
124 p = xdr_decode_hyper(p, &start);
125 p = xdr_decode_hyper(p, &len);
126 end = start + len - 1;
128 fl->fl_start = s64_to_loff_t(start);
130 if (len == 0 || end < 0)
131 fl->fl_end = OFFSET_MAX;
133 fl->fl_end = s64_to_loff_t(end);
138 * Encode result of a TEST/TEST_MSG call
141 nlm4_encode_testres(__be32 *p, struct nlm_res *resp)
145 dprintk("xdr: before encode_testres (p %p resp %p)\n", p, resp);
146 if (!(p = nlm4_encode_cookie(p, &resp->cookie)))
150 if (resp->status == nlm_lck_denied) {
151 struct file_lock *fl = &resp->lock.fl;
153 *p++ = (fl->fl_type == F_RDLCK)? xdr_zero : xdr_one;
154 *p++ = htonl(resp->lock.svid);
156 /* Encode owner handle. */
157 if (!(p = xdr_encode_netobj(p, &resp->lock.oh)))
160 start = loff_t_to_s64(fl->fl_start);
161 if (fl->fl_end == OFFSET_MAX)
164 len = loff_t_to_s64(fl->fl_end - fl->fl_start + 1);
166 p = xdr_encode_hyper(p, start);
167 p = xdr_encode_hyper(p, len);
168 dprintk("xdr: encode_testres (status %u pid %d type %d start %Ld end %Ld)\n",
169 resp->status, (int)resp->lock.svid, fl->fl_type,
170 (long long)fl->fl_start, (long long)fl->fl_end);
173 dprintk("xdr: after encode_testres (p %p resp %p)\n", p, resp);
179 * First, the server side XDR functions
182 nlm4svc_decode_testargs(struct svc_rqst *rqstp, __be32 *p)
184 struct nlm_args *argp = rqstp->rq_argp;
187 if (!(p = nlm4_decode_cookie(p, &argp->cookie)))
190 exclusive = ntohl(*p++);
191 if (!(p = nlm4_decode_lock(p, &argp->lock)))
194 argp->lock.fl.fl_type = F_WRLCK;
196 return xdr_argsize_check(rqstp, p);
200 nlm4svc_encode_testres(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp)
202 if (!(p = nlm4_encode_testres(p, resp)))
204 return xdr_ressize_check(rqstp, p);
208 nlm4svc_decode_lockargs(struct svc_rqst *rqstp, __be32 *p)
210 struct nlm_args *argp = rqstp->rq_argp;
213 if (!(p = nlm4_decode_cookie(p, &argp->cookie)))
215 argp->block = ntohl(*p++);
216 exclusive = ntohl(*p++);
217 if (!(p = nlm4_decode_lock(p, &argp->lock)))
220 argp->lock.fl.fl_type = F_WRLCK;
221 argp->reclaim = ntohl(*p++);
222 argp->state = ntohl(*p++);
223 argp->monitor = 1; /* monitor client by default */
225 return xdr_argsize_check(rqstp, p);
229 nlm4svc_decode_cancargs(struct svc_rqst *rqstp, __be32 *p)
231 struct nlm_args *argp = rqstp->rq_argp;
234 if (!(p = nlm4_decode_cookie(p, &argp->cookie)))
236 argp->block = ntohl(*p++);
237 exclusive = ntohl(*p++);
238 if (!(p = nlm4_decode_lock(p, &argp->lock)))
241 argp->lock.fl.fl_type = F_WRLCK;
242 return xdr_argsize_check(rqstp, p);
246 nlm4svc_decode_unlockargs(struct svc_rqst *rqstp, __be32 *p)
248 struct nlm_args *argp = rqstp->rq_argp;
250 if (!(p = nlm4_decode_cookie(p, &argp->cookie))
251 || !(p = nlm4_decode_lock(p, &argp->lock)))
253 argp->lock.fl.fl_type = F_UNLCK;
254 return xdr_argsize_check(rqstp, p);
258 nlm4svc_decode_shareargs(struct svc_rqst *rqstp, __be32 *p)
260 struct nlm_args *argp = rqstp->rq_argp;
261 struct nlm_lock *lock = &argp->lock;
263 memset(lock, 0, sizeof(*lock));
264 locks_init_lock(&lock->fl);
265 lock->svid = ~(u32) 0;
266 lock->fl.fl_pid = (pid_t)lock->svid;
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)))
274 argp->fsm_mode = ntohl(*p++);
275 argp->fsm_access = ntohl(*p++);
276 return xdr_argsize_check(rqstp, p);
280 nlm4svc_encode_shareres(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp)
282 if (!(p = nlm4_encode_cookie(p, &resp->cookie)))
285 *p++ = xdr_zero; /* sequence argument */
286 return xdr_ressize_check(rqstp, p);
290 nlm4svc_encode_res(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp)
292 if (!(p = nlm4_encode_cookie(p, &resp->cookie)))
295 return xdr_ressize_check(rqstp, p);
299 nlm4svc_decode_notify(struct svc_rqst *rqstp, __be32 *p)
301 struct nlm_args *argp = rqstp->rq_argp;
302 struct nlm_lock *lock = &argp->lock;
304 if (!(p = xdr_decode_string_inplace(p, &lock->caller,
305 &lock->len, NLM_MAXSTRLEN)))
307 argp->state = ntohl(*p++);
308 return xdr_argsize_check(rqstp, p);
312 nlm4svc_decode_reboot(struct svc_rqst *rqstp, __be32 *p)
314 struct nlm_reboot *argp = rqstp->rq_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 nlm4svc_decode_res(struct svc_rqst *rqstp, __be32 *p)
327 struct nlm_res *resp = rqstp->rq_argp;
329 if (!(p = nlm4_decode_cookie(p, &resp->cookie)))
332 return xdr_argsize_check(rqstp, p);
336 nlm4svc_decode_void(struct svc_rqst *rqstp, __be32 *p)
338 return xdr_argsize_check(rqstp, p);
342 nlm4svc_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
344 return xdr_ressize_check(rqstp, p);