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, nlm_args *argp)
186 if (!(p = nlm4_decode_cookie(p, &argp->cookie)))
189 exclusive = ntohl(*p++);
190 if (!(p = nlm4_decode_lock(p, &argp->lock)))
193 argp->lock.fl.fl_type = F_WRLCK;
195 return xdr_argsize_check(rqstp, p);
199 nlm4svc_encode_testres(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp)
201 if (!(p = nlm4_encode_testres(p, resp)))
203 return xdr_ressize_check(rqstp, p);
207 nlm4svc_decode_lockargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp)
211 if (!(p = nlm4_decode_cookie(p, &argp->cookie)))
213 argp->block = ntohl(*p++);
214 exclusive = ntohl(*p++);
215 if (!(p = nlm4_decode_lock(p, &argp->lock)))
218 argp->lock.fl.fl_type = F_WRLCK;
219 argp->reclaim = ntohl(*p++);
220 argp->state = ntohl(*p++);
221 argp->monitor = 1; /* monitor client by default */
223 return xdr_argsize_check(rqstp, p);
227 nlm4svc_decode_cancargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp)
231 if (!(p = nlm4_decode_cookie(p, &argp->cookie)))
233 argp->block = ntohl(*p++);
234 exclusive = ntohl(*p++);
235 if (!(p = nlm4_decode_lock(p, &argp->lock)))
238 argp->lock.fl.fl_type = F_WRLCK;
239 return xdr_argsize_check(rqstp, p);
243 nlm4svc_decode_unlockargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp)
245 if (!(p = nlm4_decode_cookie(p, &argp->cookie))
246 || !(p = nlm4_decode_lock(p, &argp->lock)))
248 argp->lock.fl.fl_type = F_UNLCK;
249 return xdr_argsize_check(rqstp, p);
253 nlm4svc_decode_shareargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp)
255 struct nlm_lock *lock = &argp->lock;
257 memset(lock, 0, sizeof(*lock));
258 locks_init_lock(&lock->fl);
259 lock->svid = ~(u32) 0;
260 lock->fl.fl_pid = (pid_t)lock->svid;
262 if (!(p = nlm4_decode_cookie(p, &argp->cookie))
263 || !(p = xdr_decode_string_inplace(p, &lock->caller,
264 &lock->len, NLM_MAXSTRLEN))
265 || !(p = nlm4_decode_fh(p, &lock->fh))
266 || !(p = nlm4_decode_oh(p, &lock->oh)))
268 argp->fsm_mode = ntohl(*p++);
269 argp->fsm_access = ntohl(*p++);
270 return xdr_argsize_check(rqstp, p);
274 nlm4svc_encode_shareres(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp)
276 if (!(p = nlm4_encode_cookie(p, &resp->cookie)))
279 *p++ = xdr_zero; /* sequence argument */
280 return xdr_ressize_check(rqstp, p);
284 nlm4svc_encode_res(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp)
286 if (!(p = nlm4_encode_cookie(p, &resp->cookie)))
289 return xdr_ressize_check(rqstp, p);
293 nlm4svc_decode_notify(struct svc_rqst *rqstp, __be32 *p, struct nlm_args *argp)
295 struct nlm_lock *lock = &argp->lock;
297 if (!(p = xdr_decode_string_inplace(p, &lock->caller,
298 &lock->len, NLM_MAXSTRLEN)))
300 argp->state = ntohl(*p++);
301 return xdr_argsize_check(rqstp, p);
305 nlm4svc_decode_reboot(struct svc_rqst *rqstp, __be32 *p, struct nlm_reboot *argp)
307 if (!(p = xdr_decode_string_inplace(p, &argp->mon, &argp->len, SM_MAXSTRLEN)))
309 argp->state = ntohl(*p++);
310 memcpy(&argp->priv.data, p, sizeof(argp->priv.data));
311 p += XDR_QUADLEN(SM_PRIV_SIZE);
312 return xdr_argsize_check(rqstp, p);
316 nlm4svc_decode_res(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp)
318 if (!(p = nlm4_decode_cookie(p, &resp->cookie)))
321 return xdr_argsize_check(rqstp, p);
325 nlm4svc_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
327 return xdr_argsize_check(rqstp, p);
331 nlm4svc_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
333 return xdr_ressize_check(rqstp, p);