Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/lockd/xdr4.c |
| 3 | * |
| 4 | * XDR support for lockd and the lock client. |
| 5 | * |
| 6 | * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> |
| 7 | * Copyright (C) 1999, Trond Myklebust <trond.myklebust@fys.uio.no> |
| 8 | */ |
| 9 | |
| 10 | #include <linux/types.h> |
| 11 | #include <linux/sched.h> |
| 12 | #include <linux/utsname.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 | #include <linux/lockd/sm_inter.h> |
| 21 | |
| 22 | #define NLMDBG_FACILITY NLMDBG_XDR |
| 23 | |
| 24 | static inline loff_t |
| 25 | s64_to_loff_t(__s64 offset) |
| 26 | { |
| 27 | return (loff_t)offset; |
| 28 | } |
| 29 | |
| 30 | |
| 31 | static inline s64 |
| 32 | loff_t_to_s64(loff_t offset) |
| 33 | { |
| 34 | s64 res; |
| 35 | if (offset > NLM4_OFFSET_MAX) |
| 36 | res = NLM4_OFFSET_MAX; |
| 37 | else if (offset < -NLM4_OFFSET_MAX) |
| 38 | res = -NLM4_OFFSET_MAX; |
| 39 | else |
| 40 | res = offset; |
| 41 | return res; |
| 42 | } |
| 43 | |
| 44 | /* |
| 45 | * XDR functions for basic NLM types |
| 46 | */ |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 47 | static __be32 * |
| 48 | nlm4_decode_cookie(__be32 *p, struct nlm_cookie *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | { |
| 50 | unsigned int len; |
| 51 | |
| 52 | len = ntohl(*p++); |
| 53 | |
| 54 | if(len==0) |
| 55 | { |
| 56 | c->len=4; |
| 57 | memset(c->data, 0, 4); /* hockeypux brain damage */ |
| 58 | } |
| 59 | else if(len<=NLM_MAXCOOKIELEN) |
| 60 | { |
| 61 | c->len=len; |
| 62 | memcpy(c->data, p, len); |
| 63 | p+=XDR_QUADLEN(len); |
| 64 | } |
| 65 | else |
| 66 | { |
| 67 | printk(KERN_NOTICE |
| 68 | "lockd: bad cookie size %d (only cookies under %d bytes are supported.)\n", len, NLM_MAXCOOKIELEN); |
| 69 | return NULL; |
| 70 | } |
| 71 | return p; |
| 72 | } |
| 73 | |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 74 | static __be32 * |
| 75 | nlm4_encode_cookie(__be32 *p, struct nlm_cookie *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | { |
| 77 | *p++ = htonl(c->len); |
| 78 | memcpy(p, c->data, c->len); |
| 79 | p+=XDR_QUADLEN(c->len); |
| 80 | return p; |
| 81 | } |
| 82 | |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 83 | static __be32 * |
| 84 | nlm4_decode_fh(__be32 *p, struct nfs_fh *f) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | { |
| 86 | memset(f->data, 0, sizeof(f->data)); |
| 87 | f->size = ntohl(*p++); |
| 88 | if (f->size > NFS_MAXFHSIZE) { |
| 89 | printk(KERN_NOTICE |
| 90 | "lockd: bad fhandle size %d (should be <=%d)\n", |
| 91 | f->size, NFS_MAXFHSIZE); |
| 92 | return NULL; |
| 93 | } |
| 94 | memcpy(f->data, p, f->size); |
| 95 | return p + XDR_QUADLEN(f->size); |
| 96 | } |
| 97 | |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 98 | static __be32 * |
| 99 | nlm4_encode_fh(__be32 *p, struct nfs_fh *f) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | { |
| 101 | *p++ = htonl(f->size); |
| 102 | if (f->size) p[XDR_QUADLEN(f->size)-1] = 0; /* don't leak anything */ |
| 103 | memcpy(p, f->data, f->size); |
| 104 | return p + XDR_QUADLEN(f->size); |
| 105 | } |
| 106 | |
| 107 | /* |
| 108 | * Encode and decode owner handle |
| 109 | */ |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 110 | static __be32 * |
| 111 | nlm4_decode_oh(__be32 *p, struct xdr_netobj *oh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | { |
| 113 | return xdr_decode_netobj(p, oh); |
| 114 | } |
| 115 | |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 116 | static __be32 * |
| 117 | nlm4_encode_oh(__be32 *p, struct xdr_netobj *oh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | { |
| 119 | return xdr_encode_netobj(p, oh); |
| 120 | } |
| 121 | |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 122 | static __be32 * |
| 123 | nlm4_decode_lock(__be32 *p, struct nlm_lock *lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | { |
| 125 | struct file_lock *fl = &lock->fl; |
| 126 | __s64 len, start, end; |
| 127 | |
| 128 | if (!(p = xdr_decode_string_inplace(p, &lock->caller, |
| 129 | &lock->len, NLM_MAXSTRLEN)) |
| 130 | || !(p = nlm4_decode_fh(p, &lock->fh)) |
| 131 | || !(p = nlm4_decode_oh(p, &lock->oh))) |
| 132 | return NULL; |
Trond Myklebust | 7bab377 | 2006-03-20 13:44:06 -0500 | [diff] [blame] | 133 | lock->svid = ntohl(*p++); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | |
| 135 | locks_init_lock(fl); |
| 136 | fl->fl_owner = current->files; |
Trond Myklebust | 7bab377 | 2006-03-20 13:44:06 -0500 | [diff] [blame] | 137 | fl->fl_pid = (pid_t)lock->svid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | fl->fl_flags = FL_POSIX; |
| 139 | fl->fl_type = F_RDLCK; /* as good as anything else */ |
| 140 | p = xdr_decode_hyper(p, &start); |
| 141 | p = xdr_decode_hyper(p, &len); |
| 142 | end = start + len - 1; |
| 143 | |
| 144 | fl->fl_start = s64_to_loff_t(start); |
| 145 | |
| 146 | if (len == 0 || end < 0) |
| 147 | fl->fl_end = OFFSET_MAX; |
| 148 | else |
| 149 | fl->fl_end = s64_to_loff_t(end); |
| 150 | return p; |
| 151 | } |
| 152 | |
| 153 | /* |
| 154 | * Encode a lock as part of an NLM call |
| 155 | */ |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 156 | static __be32 * |
| 157 | nlm4_encode_lock(__be32 *p, struct nlm_lock *lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | { |
| 159 | struct file_lock *fl = &lock->fl; |
| 160 | __s64 start, len; |
| 161 | |
| 162 | if (!(p = xdr_encode_string(p, lock->caller)) |
| 163 | || !(p = nlm4_encode_fh(p, &lock->fh)) |
| 164 | || !(p = nlm4_encode_oh(p, &lock->oh))) |
| 165 | return NULL; |
| 166 | |
| 167 | if (fl->fl_start > NLM4_OFFSET_MAX |
| 168 | || (fl->fl_end > NLM4_OFFSET_MAX && fl->fl_end != OFFSET_MAX)) |
| 169 | return NULL; |
| 170 | |
Trond Myklebust | 7bab377 | 2006-03-20 13:44:06 -0500 | [diff] [blame] | 171 | *p++ = htonl(lock->svid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | |
| 173 | start = loff_t_to_s64(fl->fl_start); |
| 174 | if (fl->fl_end == OFFSET_MAX) |
| 175 | len = 0; |
| 176 | else |
| 177 | len = loff_t_to_s64(fl->fl_end - fl->fl_start + 1); |
| 178 | |
| 179 | p = xdr_encode_hyper(p, start); |
| 180 | p = xdr_encode_hyper(p, len); |
| 181 | |
| 182 | return p; |
| 183 | } |
| 184 | |
| 185 | /* |
| 186 | * Encode result of a TEST/TEST_MSG call |
| 187 | */ |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 188 | static __be32 * |
| 189 | nlm4_encode_testres(__be32 *p, struct nlm_res *resp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | { |
| 191 | s64 start, len; |
| 192 | |
| 193 | dprintk("xdr: before encode_testres (p %p resp %p)\n", p, resp); |
| 194 | if (!(p = nlm4_encode_cookie(p, &resp->cookie))) |
| 195 | return NULL; |
| 196 | *p++ = resp->status; |
| 197 | |
| 198 | if (resp->status == nlm_lck_denied) { |
| 199 | struct file_lock *fl = &resp->lock.fl; |
| 200 | |
| 201 | *p++ = (fl->fl_type == F_RDLCK)? xdr_zero : xdr_one; |
Trond Myklebust | 7bab377 | 2006-03-20 13:44:06 -0500 | [diff] [blame] | 202 | *p++ = htonl(resp->lock.svid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
| 204 | /* Encode owner handle. */ |
| 205 | if (!(p = xdr_encode_netobj(p, &resp->lock.oh))) |
| 206 | return NULL; |
| 207 | |
| 208 | start = loff_t_to_s64(fl->fl_start); |
| 209 | if (fl->fl_end == OFFSET_MAX) |
| 210 | len = 0; |
| 211 | else |
| 212 | len = loff_t_to_s64(fl->fl_end - fl->fl_start + 1); |
| 213 | |
| 214 | p = xdr_encode_hyper(p, start); |
| 215 | p = xdr_encode_hyper(p, len); |
Trond Myklebust | 7bab377 | 2006-03-20 13:44:06 -0500 | [diff] [blame] | 216 | dprintk("xdr: encode_testres (status %u pid %d type %d start %Ld end %Ld)\n", |
| 217 | resp->status, (int)resp->lock.svid, fl->fl_type, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | (long long)fl->fl_start, (long long)fl->fl_end); |
| 219 | } |
| 220 | |
| 221 | dprintk("xdr: after encode_testres (p %p resp %p)\n", p, resp); |
| 222 | return p; |
| 223 | } |
| 224 | |
| 225 | |
| 226 | /* |
| 227 | * First, the server side XDR functions |
| 228 | */ |
| 229 | int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 230 | nlm4svc_decode_testargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | { |
| 232 | u32 exclusive; |
| 233 | |
| 234 | if (!(p = nlm4_decode_cookie(p, &argp->cookie))) |
| 235 | return 0; |
| 236 | |
| 237 | exclusive = ntohl(*p++); |
| 238 | if (!(p = nlm4_decode_lock(p, &argp->lock))) |
| 239 | return 0; |
| 240 | if (exclusive) |
| 241 | argp->lock.fl.fl_type = F_WRLCK; |
| 242 | |
| 243 | return xdr_argsize_check(rqstp, p); |
| 244 | } |
| 245 | |
| 246 | int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 247 | nlm4svc_encode_testres(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | { |
| 249 | if (!(p = nlm4_encode_testres(p, resp))) |
| 250 | return 0; |
| 251 | return xdr_ressize_check(rqstp, p); |
| 252 | } |
| 253 | |
| 254 | int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 255 | nlm4svc_decode_lockargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | { |
| 257 | u32 exclusive; |
| 258 | |
| 259 | if (!(p = nlm4_decode_cookie(p, &argp->cookie))) |
| 260 | return 0; |
| 261 | argp->block = ntohl(*p++); |
| 262 | exclusive = ntohl(*p++); |
| 263 | if (!(p = nlm4_decode_lock(p, &argp->lock))) |
| 264 | return 0; |
| 265 | if (exclusive) |
| 266 | argp->lock.fl.fl_type = F_WRLCK; |
| 267 | argp->reclaim = ntohl(*p++); |
| 268 | argp->state = ntohl(*p++); |
| 269 | argp->monitor = 1; /* monitor client by default */ |
| 270 | |
| 271 | return xdr_argsize_check(rqstp, p); |
| 272 | } |
| 273 | |
| 274 | int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 275 | nlm4svc_decode_cancargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | { |
| 277 | u32 exclusive; |
| 278 | |
| 279 | if (!(p = nlm4_decode_cookie(p, &argp->cookie))) |
| 280 | return 0; |
| 281 | argp->block = ntohl(*p++); |
| 282 | exclusive = ntohl(*p++); |
| 283 | if (!(p = nlm4_decode_lock(p, &argp->lock))) |
| 284 | return 0; |
| 285 | if (exclusive) |
| 286 | argp->lock.fl.fl_type = F_WRLCK; |
| 287 | return xdr_argsize_check(rqstp, p); |
| 288 | } |
| 289 | |
| 290 | int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 291 | nlm4svc_decode_unlockargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | { |
| 293 | if (!(p = nlm4_decode_cookie(p, &argp->cookie)) |
| 294 | || !(p = nlm4_decode_lock(p, &argp->lock))) |
| 295 | return 0; |
| 296 | argp->lock.fl.fl_type = F_UNLCK; |
| 297 | return xdr_argsize_check(rqstp, p); |
| 298 | } |
| 299 | |
| 300 | int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 301 | nlm4svc_decode_shareargs(struct svc_rqst *rqstp, __be32 *p, nlm_args *argp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | { |
| 303 | struct nlm_lock *lock = &argp->lock; |
| 304 | |
| 305 | memset(lock, 0, sizeof(*lock)); |
| 306 | locks_init_lock(&lock->fl); |
Trond Myklebust | 7bab377 | 2006-03-20 13:44:06 -0500 | [diff] [blame] | 307 | lock->svid = ~(u32) 0; |
| 308 | lock->fl.fl_pid = (pid_t)lock->svid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | |
| 310 | if (!(p = nlm4_decode_cookie(p, &argp->cookie)) |
| 311 | || !(p = xdr_decode_string_inplace(p, &lock->caller, |
| 312 | &lock->len, NLM_MAXSTRLEN)) |
| 313 | || !(p = nlm4_decode_fh(p, &lock->fh)) |
| 314 | || !(p = nlm4_decode_oh(p, &lock->oh))) |
| 315 | return 0; |
| 316 | argp->fsm_mode = ntohl(*p++); |
| 317 | argp->fsm_access = ntohl(*p++); |
| 318 | return xdr_argsize_check(rqstp, p); |
| 319 | } |
| 320 | |
| 321 | int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 322 | nlm4svc_encode_shareres(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | { |
| 324 | if (!(p = nlm4_encode_cookie(p, &resp->cookie))) |
| 325 | return 0; |
| 326 | *p++ = resp->status; |
| 327 | *p++ = xdr_zero; /* sequence argument */ |
| 328 | return xdr_ressize_check(rqstp, p); |
| 329 | } |
| 330 | |
| 331 | int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 332 | nlm4svc_encode_res(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | { |
| 334 | if (!(p = nlm4_encode_cookie(p, &resp->cookie))) |
| 335 | return 0; |
| 336 | *p++ = resp->status; |
| 337 | return xdr_ressize_check(rqstp, p); |
| 338 | } |
| 339 | |
| 340 | int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 341 | nlm4svc_decode_notify(struct svc_rqst *rqstp, __be32 *p, struct nlm_args *argp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | { |
| 343 | struct nlm_lock *lock = &argp->lock; |
| 344 | |
| 345 | if (!(p = xdr_decode_string_inplace(p, &lock->caller, |
| 346 | &lock->len, NLM_MAXSTRLEN))) |
| 347 | return 0; |
| 348 | argp->state = ntohl(*p++); |
| 349 | return xdr_argsize_check(rqstp, p); |
| 350 | } |
| 351 | |
| 352 | int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 353 | nlm4svc_decode_reboot(struct svc_rqst *rqstp, __be32 *p, struct nlm_reboot *argp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | { |
| 355 | if (!(p = xdr_decode_string_inplace(p, &argp->mon, &argp->len, SM_MAXSTRLEN))) |
| 356 | return 0; |
| 357 | argp->state = ntohl(*p++); |
| 358 | /* Preserve the address in network byte order */ |
J. Bruce Fields | a659753 | 2006-01-03 09:55:46 +0100 | [diff] [blame] | 359 | argp->addr = *p++; |
| 360 | argp->vers = *p++; |
| 361 | argp->proto = *p++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | return xdr_argsize_check(rqstp, p); |
| 363 | } |
| 364 | |
| 365 | int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 366 | nlm4svc_decode_res(struct svc_rqst *rqstp, __be32 *p, struct nlm_res *resp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | { |
| 368 | if (!(p = nlm4_decode_cookie(p, &resp->cookie))) |
| 369 | return 0; |
Al Viro | e8c5c04 | 2006-12-13 00:35:03 -0800 | [diff] [blame] | 370 | resp->status = *p++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | return xdr_argsize_check(rqstp, p); |
| 372 | } |
| 373 | |
| 374 | int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 375 | nlm4svc_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | { |
| 377 | return xdr_argsize_check(rqstp, p); |
| 378 | } |
| 379 | |
| 380 | int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 381 | nlm4svc_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | { |
| 383 | return xdr_ressize_check(rqstp, p); |
| 384 | } |
| 385 | |
| 386 | /* |
| 387 | * Now, the client side XDR functions |
| 388 | */ |
| 389 | #ifdef NLMCLNT_SUPPORT_SHARES |
| 390 | static int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 391 | nlm4clt_decode_void(struct rpc_rqst *req, __be32 *p, void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | { |
| 393 | return 0; |
| 394 | } |
| 395 | #endif |
| 396 | |
| 397 | static int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 398 | nlm4clt_encode_testargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | { |
| 400 | struct nlm_lock *lock = &argp->lock; |
| 401 | |
| 402 | if (!(p = nlm4_encode_cookie(p, &argp->cookie))) |
| 403 | return -EIO; |
| 404 | *p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero; |
| 405 | if (!(p = nlm4_encode_lock(p, lock))) |
| 406 | return -EIO; |
| 407 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); |
| 408 | return 0; |
| 409 | } |
| 410 | |
| 411 | static int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 412 | nlm4clt_decode_testres(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | { |
| 414 | if (!(p = nlm4_decode_cookie(p, &resp->cookie))) |
| 415 | return -EIO; |
Al Viro | e8c5c04 | 2006-12-13 00:35:03 -0800 | [diff] [blame] | 416 | resp->status = *p++; |
| 417 | if (resp->status == nlm_lck_denied) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | struct file_lock *fl = &resp->lock.fl; |
| 419 | u32 excl; |
| 420 | s64 start, end, len; |
| 421 | |
| 422 | memset(&resp->lock, 0, sizeof(resp->lock)); |
| 423 | locks_init_lock(fl); |
| 424 | excl = ntohl(*p++); |
Trond Myklebust | 7bab377 | 2006-03-20 13:44:06 -0500 | [diff] [blame] | 425 | resp->lock.svid = ntohl(*p++); |
| 426 | fl->fl_pid = (pid_t)resp->lock.svid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | if (!(p = nlm4_decode_oh(p, &resp->lock.oh))) |
| 428 | return -EIO; |
| 429 | |
| 430 | fl->fl_flags = FL_POSIX; |
| 431 | fl->fl_type = excl? F_WRLCK : F_RDLCK; |
| 432 | p = xdr_decode_hyper(p, &start); |
| 433 | p = xdr_decode_hyper(p, &len); |
| 434 | end = start + len - 1; |
| 435 | |
| 436 | fl->fl_start = s64_to_loff_t(start); |
| 437 | if (len == 0 || end < 0) |
| 438 | fl->fl_end = OFFSET_MAX; |
| 439 | else |
| 440 | fl->fl_end = s64_to_loff_t(end); |
| 441 | } |
| 442 | return 0; |
| 443 | } |
| 444 | |
| 445 | |
| 446 | static int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 447 | nlm4clt_encode_lockargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | { |
| 449 | struct nlm_lock *lock = &argp->lock; |
| 450 | |
| 451 | if (!(p = nlm4_encode_cookie(p, &argp->cookie))) |
| 452 | return -EIO; |
| 453 | *p++ = argp->block? xdr_one : xdr_zero; |
| 454 | *p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero; |
| 455 | if (!(p = nlm4_encode_lock(p, lock))) |
| 456 | return -EIO; |
| 457 | *p++ = argp->reclaim? xdr_one : xdr_zero; |
| 458 | *p++ = htonl(argp->state); |
| 459 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); |
| 460 | return 0; |
| 461 | } |
| 462 | |
| 463 | static int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 464 | nlm4clt_encode_cancargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | { |
| 466 | struct nlm_lock *lock = &argp->lock; |
| 467 | |
| 468 | if (!(p = nlm4_encode_cookie(p, &argp->cookie))) |
| 469 | return -EIO; |
| 470 | *p++ = argp->block? xdr_one : xdr_zero; |
| 471 | *p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero; |
| 472 | if (!(p = nlm4_encode_lock(p, lock))) |
| 473 | return -EIO; |
| 474 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); |
| 475 | return 0; |
| 476 | } |
| 477 | |
| 478 | static int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 479 | nlm4clt_encode_unlockargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | { |
| 481 | struct nlm_lock *lock = &argp->lock; |
| 482 | |
| 483 | if (!(p = nlm4_encode_cookie(p, &argp->cookie))) |
| 484 | return -EIO; |
| 485 | if (!(p = nlm4_encode_lock(p, lock))) |
| 486 | return -EIO; |
| 487 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); |
| 488 | return 0; |
| 489 | } |
| 490 | |
| 491 | static int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 492 | nlm4clt_encode_res(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | { |
| 494 | if (!(p = nlm4_encode_cookie(p, &resp->cookie))) |
| 495 | return -EIO; |
| 496 | *p++ = resp->status; |
| 497 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); |
| 498 | return 0; |
| 499 | } |
| 500 | |
| 501 | static int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 502 | nlm4clt_encode_testres(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | { |
| 504 | if (!(p = nlm4_encode_testres(p, resp))) |
| 505 | return -EIO; |
| 506 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); |
| 507 | return 0; |
| 508 | } |
| 509 | |
| 510 | static int |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 511 | nlm4clt_decode_res(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | { |
| 513 | if (!(p = nlm4_decode_cookie(p, &resp->cookie))) |
| 514 | return -EIO; |
Al Viro | e8c5c04 | 2006-12-13 00:35:03 -0800 | [diff] [blame] | 515 | resp->status = *p++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | return 0; |
| 517 | } |
| 518 | |
Chuck Lever | 511d2e8 | 2007-03-29 16:47:47 -0400 | [diff] [blame] | 519 | #if (NLMCLNT_OHSIZE > XDR_MAX_NETOBJ) |
| 520 | # error "NLM host name cannot be larger than XDR_MAX_NETOBJ!" |
| 521 | #endif |
| 522 | |
| 523 | #if (NLMCLNT_OHSIZE > NLM_MAXSTRLEN) |
| 524 | # error "NLM host name cannot be larger than NLM's maximum string length!" |
| 525 | #endif |
| 526 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | /* |
| 528 | * Buffer requirements for NLM |
| 529 | */ |
| 530 | #define NLM4_void_sz 0 |
| 531 | #define NLM4_cookie_sz 1+XDR_QUADLEN(NLM_MAXCOOKIELEN) |
Chuck Lever | 511d2e8 | 2007-03-29 16:47:47 -0400 | [diff] [blame] | 532 | #define NLM4_caller_sz 1+XDR_QUADLEN(NLMCLNT_OHSIZE) |
| 533 | #define NLM4_owner_sz 1+XDR_QUADLEN(NLMCLNT_OHSIZE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | #define NLM4_fhandle_sz 1+XDR_QUADLEN(NFS3_FHSIZE) |
Chuck Lever | 511d2e8 | 2007-03-29 16:47:47 -0400 | [diff] [blame] | 535 | #define NLM4_lock_sz 5+NLM4_caller_sz+NLM4_owner_sz+NLM4_fhandle_sz |
| 536 | #define NLM4_holder_sz 6+NLM4_owner_sz |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | |
| 538 | #define NLM4_testargs_sz NLM4_cookie_sz+1+NLM4_lock_sz |
| 539 | #define NLM4_lockargs_sz NLM4_cookie_sz+4+NLM4_lock_sz |
| 540 | #define NLM4_cancargs_sz NLM4_cookie_sz+2+NLM4_lock_sz |
| 541 | #define NLM4_unlockargs_sz NLM4_cookie_sz+NLM4_lock_sz |
| 542 | |
| 543 | #define NLM4_testres_sz NLM4_cookie_sz+1+NLM4_holder_sz |
| 544 | #define NLM4_res_sz NLM4_cookie_sz+1 |
| 545 | #define NLM4_norep_sz 0 |
| 546 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | /* |
| 548 | * For NLM, a void procedure really returns nothing |
| 549 | */ |
| 550 | #define nlm4clt_decode_norep NULL |
| 551 | |
| 552 | #define PROC(proc, argtype, restype) \ |
| 553 | [NLMPROC_##proc] = { \ |
| 554 | .p_proc = NLMPROC_##proc, \ |
| 555 | .p_encode = (kxdrproc_t) nlm4clt_encode_##argtype, \ |
| 556 | .p_decode = (kxdrproc_t) nlm4clt_decode_##restype, \ |
Chuck Lever | 2bea90d | 2007-03-29 16:47:53 -0400 | [diff] [blame^] | 557 | .p_arglen = NLM4_##argtype##_sz, \ |
| 558 | .p_replen = NLM4_##restype##_sz, \ |
Chuck Lever | cc0175c | 2006-03-20 13:44:22 -0500 | [diff] [blame] | 559 | .p_statidx = NLMPROC_##proc, \ |
| 560 | .p_name = #proc, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | } |
| 562 | |
| 563 | static struct rpc_procinfo nlm4_procedures[] = { |
| 564 | PROC(TEST, testargs, testres), |
| 565 | PROC(LOCK, lockargs, res), |
| 566 | PROC(CANCEL, cancargs, res), |
| 567 | PROC(UNLOCK, unlockargs, res), |
| 568 | PROC(GRANTED, testargs, res), |
| 569 | PROC(TEST_MSG, testargs, norep), |
| 570 | PROC(LOCK_MSG, lockargs, norep), |
| 571 | PROC(CANCEL_MSG, cancargs, norep), |
| 572 | PROC(UNLOCK_MSG, unlockargs, norep), |
| 573 | PROC(GRANTED_MSG, testargs, norep), |
| 574 | PROC(TEST_RES, testres, norep), |
| 575 | PROC(LOCK_RES, res, norep), |
| 576 | PROC(CANCEL_RES, res, norep), |
| 577 | PROC(UNLOCK_RES, res, norep), |
| 578 | PROC(GRANTED_RES, res, norep), |
| 579 | #ifdef NLMCLNT_SUPPORT_SHARES |
| 580 | PROC(SHARE, shareargs, shareres), |
| 581 | PROC(UNSHARE, shareargs, shareres), |
| 582 | PROC(NM_LOCK, lockargs, res), |
| 583 | PROC(FREE_ALL, notify, void), |
| 584 | #endif |
| 585 | }; |
| 586 | |
| 587 | struct rpc_version nlm_version4 = { |
| 588 | .number = 4, |
| 589 | .nrprocs = 24, |
| 590 | .procs = nlm4_procedures, |
| 591 | }; |