1 /* 2 * linux/fs/nfs/nfs2xdr.c 3 * 4 * XDR functions to encode/decode NFS RPC arguments and results. 5 * 6 * Copyright (C) 1992, 1993, 1994 Rick Sladkey 7 * Copyright (C) 1996 Olaf Kirch 8 * 04 Aug 1998 Ion Badulescu <ionut@cs.columbia.edu> 9 * FIFO's need special handling in NFSv2 10 */ 11 12 #include <linux/param.h> 13 #include <linux/time.h> 14 #include <linux/mm.h> 15 #include <linux/errno.h> 16 #include <linux/string.h> 17 #include <linux/in.h> 18 #include <linux/pagemap.h> 19 #include <linux/proc_fs.h> 20 #include <linux/sunrpc/clnt.h> 21 #include <linux/nfs.h> 22 #include <linux/nfs2.h> 23 #include <linux/nfs_fs.h> 24 #include "internal.h" 25 26 #define NFSDBG_FACILITY NFSDBG_XDR 27 28 /* Mapping from NFS error code to "errno" error code. */ 29 #define errno_NFSERR_IO EIO 30 31 /* 32 * Declare the space requirements for NFS arguments and replies as 33 * number of 32bit-words 34 */ 35 #define NFS_fhandle_sz (8) 36 #define NFS_sattr_sz (8) 37 #define NFS_filename_sz (1+(NFS2_MAXNAMLEN>>2)) 38 #define NFS_path_sz (1+(NFS2_MAXPATHLEN>>2)) 39 #define NFS_fattr_sz (17) 40 #define NFS_info_sz (5) 41 #define NFS_entry_sz (NFS_filename_sz+3) 42 43 #define NFS_diropargs_sz (NFS_fhandle_sz+NFS_filename_sz) 44 #define NFS_removeargs_sz (NFS_fhandle_sz+NFS_filename_sz) 45 #define NFS_sattrargs_sz (NFS_fhandle_sz+NFS_sattr_sz) 46 #define NFS_readlinkargs_sz (NFS_fhandle_sz) 47 #define NFS_readargs_sz (NFS_fhandle_sz+3) 48 #define NFS_writeargs_sz (NFS_fhandle_sz+4) 49 #define NFS_createargs_sz (NFS_diropargs_sz+NFS_sattr_sz) 50 #define NFS_renameargs_sz (NFS_diropargs_sz+NFS_diropargs_sz) 51 #define NFS_linkargs_sz (NFS_fhandle_sz+NFS_diropargs_sz) 52 #define NFS_symlinkargs_sz (NFS_diropargs_sz+1+NFS_sattr_sz) 53 #define NFS_readdirargs_sz (NFS_fhandle_sz+2) 54 55 #define NFS_attrstat_sz (1+NFS_fattr_sz) 56 #define NFS_diropres_sz (1+NFS_fhandle_sz+NFS_fattr_sz) 57 #define NFS_readlinkres_sz (2) 58 #define NFS_readres_sz (1+NFS_fattr_sz+1) 59 #define NFS_writeres_sz (NFS_attrstat_sz) 60 #define NFS_stat_sz (1) 61 #define NFS_readdirres_sz (1) 62 #define NFS_statfsres_sz (1+NFS_info_sz) 63 64 /* 65 * Common NFS XDR functions as inlines 66 */ 67 static inline __be32 * 68 xdr_encode_fhandle(__be32 *p, const struct nfs_fh *fhandle) 69 { 70 memcpy(p, fhandle->data, NFS2_FHSIZE); 71 return p + XDR_QUADLEN(NFS2_FHSIZE); 72 } 73 74 static inline __be32 * 75 xdr_decode_fhandle(__be32 *p, struct nfs_fh *fhandle) 76 { 77 /* NFSv2 handles have a fixed length */ 78 fhandle->size = NFS2_FHSIZE; 79 memcpy(fhandle->data, p, NFS2_FHSIZE); 80 return p + XDR_QUADLEN(NFS2_FHSIZE); 81 } 82 83 static inline __be32* 84 xdr_encode_time(__be32 *p, struct timespec *timep) 85 { 86 *p++ = htonl(timep->tv_sec); 87 /* Convert nanoseconds into microseconds */ 88 *p++ = htonl(timep->tv_nsec ? timep->tv_nsec / 1000 : 0); 89 return p; 90 } 91 92 static inline __be32* 93 xdr_encode_current_server_time(__be32 *p, struct timespec *timep) 94 { 95 /* 96 * Passing the invalid value useconds=1000000 is a 97 * Sun convention for "set to current server time". 98 * It's needed to make permissions checks for the 99 * "touch" program across v2 mounts to Solaris and 100 * Irix boxes work correctly. See description of 101 * sattr in section 6.1 of "NFS Illustrated" by 102 * Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5 103 */ 104 *p++ = htonl(timep->tv_sec); 105 *p++ = htonl(1000000); 106 return p; 107 } 108 109 static inline __be32* 110 xdr_decode_time(__be32 *p, struct timespec *timep) 111 { 112 timep->tv_sec = ntohl(*p++); 113 /* Convert microseconds into nanoseconds */ 114 timep->tv_nsec = ntohl(*p++) * 1000; 115 return p; 116 } 117 118 static __be32 * 119 xdr_decode_fattr(__be32 *p, struct nfs_fattr *fattr) 120 { 121 u32 rdev, type; 122 type = ntohl(*p++); 123 fattr->mode = ntohl(*p++); 124 fattr->nlink = ntohl(*p++); 125 fattr->uid = ntohl(*p++); 126 fattr->gid = ntohl(*p++); 127 fattr->size = ntohl(*p++); 128 fattr->du.nfs2.blocksize = ntohl(*p++); 129 rdev = ntohl(*p++); 130 fattr->du.nfs2.blocks = ntohl(*p++); 131 fattr->fsid.major = ntohl(*p++); 132 fattr->fsid.minor = 0; 133 fattr->fileid = ntohl(*p++); 134 p = xdr_decode_time(p, &fattr->atime); 135 p = xdr_decode_time(p, &fattr->mtime); 136 p = xdr_decode_time(p, &fattr->ctime); 137 fattr->valid |= NFS_ATTR_FATTR_V2; 138 fattr->rdev = new_decode_dev(rdev); 139 if (type == NFCHR && rdev == NFS2_FIFO_DEV) { 140 fattr->mode = (fattr->mode & ~S_IFMT) | S_IFIFO; 141 fattr->rdev = 0; 142 } 143 return p; 144 } 145 146 static inline __be32 * 147 xdr_encode_sattr(__be32 *p, struct iattr *attr) 148 { 149 const __be32 not_set = __constant_htonl(0xFFFFFFFF); 150 151 *p++ = (attr->ia_valid & ATTR_MODE) ? htonl(attr->ia_mode) : not_set; 152 *p++ = (attr->ia_valid & ATTR_UID) ? htonl(attr->ia_uid) : not_set; 153 *p++ = (attr->ia_valid & ATTR_GID) ? htonl(attr->ia_gid) : not_set; 154 *p++ = (attr->ia_valid & ATTR_SIZE) ? htonl(attr->ia_size) : not_set; 155 156 if (attr->ia_valid & ATTR_ATIME_SET) { 157 p = xdr_encode_time(p, &attr->ia_atime); 158 } else if (attr->ia_valid & ATTR_ATIME) { 159 p = xdr_encode_current_server_time(p, &attr->ia_atime); 160 } else { 161 *p++ = not_set; 162 *p++ = not_set; 163 } 164 165 if (attr->ia_valid & ATTR_MTIME_SET) { 166 p = xdr_encode_time(p, &attr->ia_mtime); 167 } else if (attr->ia_valid & ATTR_MTIME) { 168 p = xdr_encode_current_server_time(p, &attr->ia_mtime); 169 } else { 170 *p++ = not_set; 171 *p++ = not_set; 172 } 173 return p; 174 } 175 176 /* 177 * NFS encode functions 178 */ 179 /* 180 * Encode file handle argument 181 * GETATTR, READLINK, STATFS 182 */ 183 static int 184 nfs_xdr_fhandle(struct rpc_rqst *req, __be32 *p, struct nfs_fh *fh) 185 { 186 p = xdr_encode_fhandle(p, fh); 187 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 188 return 0; 189 } 190 191 /* 192 * Encode SETATTR arguments 193 */ 194 static int 195 nfs_xdr_sattrargs(struct rpc_rqst *req, __be32 *p, struct nfs_sattrargs *args) 196 { 197 p = xdr_encode_fhandle(p, args->fh); 198 p = xdr_encode_sattr(p, args->sattr); 199 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 200 return 0; 201 } 202 203 /* 204 * Encode directory ops argument 205 * LOOKUP, RMDIR 206 */ 207 static int 208 nfs_xdr_diropargs(struct rpc_rqst *req, __be32 *p, struct nfs_diropargs *args) 209 { 210 p = xdr_encode_fhandle(p, args->fh); 211 p = xdr_encode_array(p, args->name, args->len); 212 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 213 return 0; 214 } 215 216 /* 217 * Encode REMOVE argument 218 */ 219 static int 220 nfs_xdr_removeargs(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args) 221 { 222 p = xdr_encode_fhandle(p, args->fh); 223 p = xdr_encode_array(p, args->name.name, args->name.len); 224 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 225 return 0; 226 } 227 228 /* 229 * Arguments to a READ call. Since we read data directly into the page 230 * cache, we also set up the reply iovec here so that iov[1] points 231 * exactly to the page we want to fetch. 232 */ 233 static int 234 nfs_xdr_readargs(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args) 235 { 236 struct rpc_auth *auth = req->rq_cred->cr_auth; 237 unsigned int replen; 238 u32 offset = (u32)args->offset; 239 u32 count = args->count; 240 241 p = xdr_encode_fhandle(p, args->fh); 242 *p++ = htonl(offset); 243 *p++ = htonl(count); 244 *p++ = htonl(count); 245 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 246 247 /* Inline the page array */ 248 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readres_sz) << 2; 249 xdr_inline_pages(&req->rq_rcv_buf, replen, 250 args->pages, args->pgbase, count); 251 req->rq_rcv_buf.flags |= XDRBUF_READ; 252 return 0; 253 } 254 255 /* 256 * Decode READ reply 257 */ 258 static int 259 nfs_xdr_readres(struct rpc_rqst *req, __be32 *p, struct nfs_readres *res) 260 { 261 struct kvec *iov = req->rq_rcv_buf.head; 262 size_t hdrlen; 263 u32 count, recvd; 264 int status; 265 266 if ((status = ntohl(*p++))) 267 return nfs_stat_to_errno(status); 268 p = xdr_decode_fattr(p, res->fattr); 269 270 count = ntohl(*p++); 271 res->eof = 0; 272 hdrlen = (u8 *) p - (u8 *) iov->iov_base; 273 if (iov->iov_len < hdrlen) { 274 dprintk("NFS: READ reply header overflowed:" 275 "length %Zu > %Zu\n", hdrlen, iov->iov_len); 276 return -errno_NFSERR_IO; 277 } else if (iov->iov_len != hdrlen) { 278 dprintk("NFS: READ header is short. iovec will be shifted.\n"); 279 xdr_shift_buf(&req->rq_rcv_buf, iov->iov_len - hdrlen); 280 } 281 282 recvd = req->rq_rcv_buf.len - hdrlen; 283 if (count > recvd) { 284 dprintk("NFS: server cheating in read reply: " 285 "count %u > recvd %u\n", count, recvd); 286 count = recvd; 287 } 288 289 dprintk("RPC: readres OK count %u\n", count); 290 if (count < res->count) 291 res->count = count; 292 293 return count; 294 } 295 296 297 /* 298 * Write arguments. Splice the buffer to be written into the iovec. 299 */ 300 static int 301 nfs_xdr_writeargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args) 302 { 303 struct xdr_buf *sndbuf = &req->rq_snd_buf; 304 u32 offset = (u32)args->offset; 305 u32 count = args->count; 306 307 p = xdr_encode_fhandle(p, args->fh); 308 *p++ = htonl(offset); 309 *p++ = htonl(offset); 310 *p++ = htonl(count); 311 *p++ = htonl(count); 312 sndbuf->len = xdr_adjust_iovec(sndbuf->head, p); 313 314 /* Copy the page array */ 315 xdr_encode_pages(sndbuf, args->pages, args->pgbase, count); 316 sndbuf->flags |= XDRBUF_WRITE; 317 return 0; 318 } 319 320 /* 321 * Encode create arguments 322 * CREATE, MKDIR 323 */ 324 static int 325 nfs_xdr_createargs(struct rpc_rqst *req, __be32 *p, struct nfs_createargs *args) 326 { 327 p = xdr_encode_fhandle(p, args->fh); 328 p = xdr_encode_array(p, args->name, args->len); 329 p = xdr_encode_sattr(p, args->sattr); 330 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 331 return 0; 332 } 333 334 /* 335 * Encode RENAME arguments 336 */ 337 static int 338 nfs_xdr_renameargs(struct rpc_rqst *req, __be32 *p, struct nfs_renameargs *args) 339 { 340 p = xdr_encode_fhandle(p, args->old_dir); 341 p = xdr_encode_array(p, args->old_name->name, args->old_name->len); 342 p = xdr_encode_fhandle(p, args->new_dir); 343 p = xdr_encode_array(p, args->new_name->name, args->new_name->len); 344 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 345 return 0; 346 } 347 348 /* 349 * Encode LINK arguments 350 */ 351 static int 352 nfs_xdr_linkargs(struct rpc_rqst *req, __be32 *p, struct nfs_linkargs *args) 353 { 354 p = xdr_encode_fhandle(p, args->fromfh); 355 p = xdr_encode_fhandle(p, args->tofh); 356 p = xdr_encode_array(p, args->toname, args->tolen); 357 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 358 return 0; 359 } 360 361 /* 362 * Encode SYMLINK arguments 363 */ 364 static int 365 nfs_xdr_symlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs_symlinkargs *args) 366 { 367 struct xdr_buf *sndbuf = &req->rq_snd_buf; 368 size_t pad; 369 370 p = xdr_encode_fhandle(p, args->fromfh); 371 p = xdr_encode_array(p, args->fromname, args->fromlen); 372 *p++ = htonl(args->pathlen); 373 sndbuf->len = xdr_adjust_iovec(sndbuf->head, p); 374 375 xdr_encode_pages(sndbuf, args->pages, 0, args->pathlen); 376 377 /* 378 * xdr_encode_pages may have added a few bytes to ensure the 379 * pathname ends on a 4-byte boundary. Start encoding the 380 * attributes after the pad bytes. 381 */ 382 pad = sndbuf->tail->iov_len; 383 if (pad > 0) 384 p++; 385 p = xdr_encode_sattr(p, args->sattr); 386 sndbuf->len += xdr_adjust_iovec(sndbuf->tail, p) - pad; 387 return 0; 388 } 389 390 /* 391 * Encode arguments to readdir call 392 */ 393 static int 394 nfs_xdr_readdirargs(struct rpc_rqst *req, __be32 *p, struct nfs_readdirargs *args) 395 { 396 struct rpc_auth *auth = req->rq_cred->cr_auth; 397 unsigned int replen; 398 u32 count = args->count; 399 400 p = xdr_encode_fhandle(p, args->fh); 401 *p++ = htonl(args->cookie); 402 *p++ = htonl(count); /* see above */ 403 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 404 405 /* Inline the page array */ 406 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readdirres_sz) << 2; 407 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0, count); 408 return 0; 409 } 410 411 /* 412 * Decode the result of a readdir call. 413 * We're not really decoding anymore, we just leave the buffer untouched 414 * and only check that it is syntactically correct. 415 * The real decoding happens in nfs_decode_entry below, called directly 416 * from nfs_readdir for each entry. 417 */ 418 static int 419 nfs_xdr_readdirres(struct rpc_rqst *req, __be32 *p, void *dummy) 420 { 421 struct xdr_buf *rcvbuf = &req->rq_rcv_buf; 422 struct kvec *iov = rcvbuf->head; 423 struct page **page; 424 size_t hdrlen; 425 unsigned int pglen, recvd; 426 int status; 427 428 if ((status = ntohl(*p++))) 429 return nfs_stat_to_errno(status); 430 431 hdrlen = (u8 *) p - (u8 *) iov->iov_base; 432 if (iov->iov_len < hdrlen) { 433 dprintk("NFS: READDIR reply header overflowed:" 434 "length %Zu > %Zu\n", hdrlen, iov->iov_len); 435 return -errno_NFSERR_IO; 436 } else if (iov->iov_len != hdrlen) { 437 dprintk("NFS: READDIR header is short. iovec will be shifted.\n"); 438 xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen); 439 } 440 441 pglen = rcvbuf->page_len; 442 recvd = rcvbuf->len - hdrlen; 443 if (pglen > recvd) 444 pglen = recvd; 445 page = rcvbuf->pages; 446 return pglen; 447 } 448 449 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) 450 { 451 dprintk("nfs: %s: prematurely hit end of receive buffer. " 452 "Remaining buffer length is %tu words.\n", 453 func, xdr->end - xdr->p); 454 } 455 456 __be32 * 457 nfs_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, struct nfs_server *server, int plus) 458 { 459 __be32 *p; 460 p = xdr_inline_decode(xdr, 4); 461 if (unlikely(!p)) 462 goto out_overflow; 463 if (!ntohl(*p++)) { 464 p = xdr_inline_decode(xdr, 4); 465 if (unlikely(!p)) 466 goto out_overflow; 467 if (!ntohl(*p++)) 468 return ERR_PTR(-EAGAIN); 469 entry->eof = 1; 470 return ERR_PTR(-EBADCOOKIE); 471 } 472 473 p = xdr_inline_decode(xdr, 8); 474 if (unlikely(!p)) 475 goto out_overflow; 476 477 entry->ino = ntohl(*p++); 478 entry->len = ntohl(*p++); 479 480 p = xdr_inline_decode(xdr, entry->len + 4); 481 if (unlikely(!p)) 482 goto out_overflow; 483 entry->name = (const char *) p; 484 p += XDR_QUADLEN(entry->len); 485 entry->prev_cookie = entry->cookie; 486 entry->cookie = ntohl(*p++); 487 488 entry->d_type = DT_UNKNOWN; 489 490 p = xdr_inline_peek(xdr, 8); 491 if (p != NULL) 492 entry->eof = !p[0] && p[1]; 493 else 494 entry->eof = 0; 495 496 return p; 497 498 out_overflow: 499 print_overflow_msg(__func__, xdr); 500 return ERR_PTR(-EAGAIN); 501 } 502 503 /* 504 * NFS XDR decode functions 505 */ 506 /* 507 * Decode simple status reply 508 */ 509 static int 510 nfs_xdr_stat(struct rpc_rqst *req, __be32 *p, void *dummy) 511 { 512 int status; 513 514 if ((status = ntohl(*p++)) != 0) 515 status = nfs_stat_to_errno(status); 516 return status; 517 } 518 519 /* 520 * Decode attrstat reply 521 * GETATTR, SETATTR, WRITE 522 */ 523 static int 524 nfs_xdr_attrstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) 525 { 526 int status; 527 528 if ((status = ntohl(*p++))) 529 return nfs_stat_to_errno(status); 530 xdr_decode_fattr(p, fattr); 531 return 0; 532 } 533 534 /* 535 * Decode diropres reply 536 * LOOKUP, CREATE, MKDIR 537 */ 538 static int 539 nfs_xdr_diropres(struct rpc_rqst *req, __be32 *p, struct nfs_diropok *res) 540 { 541 int status; 542 543 if ((status = ntohl(*p++))) 544 return nfs_stat_to_errno(status); 545 p = xdr_decode_fhandle(p, res->fh); 546 xdr_decode_fattr(p, res->fattr); 547 return 0; 548 } 549 550 /* 551 * Encode READLINK args 552 */ 553 static int 554 nfs_xdr_readlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs_readlinkargs *args) 555 { 556 struct rpc_auth *auth = req->rq_cred->cr_auth; 557 unsigned int replen; 558 559 p = xdr_encode_fhandle(p, args->fh); 560 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 561 562 /* Inline the page array */ 563 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readlinkres_sz) << 2; 564 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, args->pgbase, args->pglen); 565 return 0; 566 } 567 568 /* 569 * Decode READLINK reply 570 */ 571 static int 572 nfs_xdr_readlinkres(struct rpc_rqst *req, __be32 *p, void *dummy) 573 { 574 struct xdr_buf *rcvbuf = &req->rq_rcv_buf; 575 struct kvec *iov = rcvbuf->head; 576 size_t hdrlen; 577 u32 len, recvd; 578 int status; 579 580 if ((status = ntohl(*p++))) 581 return nfs_stat_to_errno(status); 582 /* Convert length of symlink */ 583 len = ntohl(*p++); 584 if (len >= rcvbuf->page_len) { 585 dprintk("nfs: server returned giant symlink!\n"); 586 return -ENAMETOOLONG; 587 } 588 hdrlen = (u8 *) p - (u8 *) iov->iov_base; 589 if (iov->iov_len < hdrlen) { 590 dprintk("NFS: READLINK reply header overflowed:" 591 "length %Zu > %Zu\n", hdrlen, iov->iov_len); 592 return -errno_NFSERR_IO; 593 } else if (iov->iov_len != hdrlen) { 594 dprintk("NFS: READLINK header is short. iovec will be shifted.\n"); 595 xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen); 596 } 597 recvd = req->rq_rcv_buf.len - hdrlen; 598 if (recvd < len) { 599 dprintk("NFS: server cheating in readlink reply: " 600 "count %u > recvd %u\n", len, recvd); 601 return -EIO; 602 } 603 604 xdr_terminate_string(rcvbuf, len); 605 return 0; 606 } 607 608 /* 609 * Decode WRITE reply 610 */ 611 static int 612 nfs_xdr_writeres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res) 613 { 614 res->verf->committed = NFS_FILE_SYNC; 615 return nfs_xdr_attrstat(req, p, res->fattr); 616 } 617 618 /* 619 * Decode STATFS reply 620 */ 621 static int 622 nfs_xdr_statfsres(struct rpc_rqst *req, __be32 *p, struct nfs2_fsstat *res) 623 { 624 int status; 625 626 if ((status = ntohl(*p++))) 627 return nfs_stat_to_errno(status); 628 629 res->tsize = ntohl(*p++); 630 res->bsize = ntohl(*p++); 631 res->blocks = ntohl(*p++); 632 res->bfree = ntohl(*p++); 633 res->bavail = ntohl(*p++); 634 return 0; 635 } 636 637 /* 638 * We need to translate between nfs status return values and 639 * the local errno values which may not be the same. 640 */ 641 static struct { 642 int stat; 643 int errno; 644 } nfs_errtbl[] = { 645 { NFS_OK, 0 }, 646 { NFSERR_PERM, -EPERM }, 647 { NFSERR_NOENT, -ENOENT }, 648 { NFSERR_IO, -errno_NFSERR_IO}, 649 { NFSERR_NXIO, -ENXIO }, 650 /* { NFSERR_EAGAIN, -EAGAIN }, */ 651 { NFSERR_ACCES, -EACCES }, 652 { NFSERR_EXIST, -EEXIST }, 653 { NFSERR_XDEV, -EXDEV }, 654 { NFSERR_NODEV, -ENODEV }, 655 { NFSERR_NOTDIR, -ENOTDIR }, 656 { NFSERR_ISDIR, -EISDIR }, 657 { NFSERR_INVAL, -EINVAL }, 658 { NFSERR_FBIG, -EFBIG }, 659 { NFSERR_NOSPC, -ENOSPC }, 660 { NFSERR_ROFS, -EROFS }, 661 { NFSERR_MLINK, -EMLINK }, 662 { NFSERR_NAMETOOLONG, -ENAMETOOLONG }, 663 { NFSERR_NOTEMPTY, -ENOTEMPTY }, 664 { NFSERR_DQUOT, -EDQUOT }, 665 { NFSERR_STALE, -ESTALE }, 666 { NFSERR_REMOTE, -EREMOTE }, 667 #ifdef EWFLUSH 668 { NFSERR_WFLUSH, -EWFLUSH }, 669 #endif 670 { NFSERR_BADHANDLE, -EBADHANDLE }, 671 { NFSERR_NOT_SYNC, -ENOTSYNC }, 672 { NFSERR_BAD_COOKIE, -EBADCOOKIE }, 673 { NFSERR_NOTSUPP, -ENOTSUPP }, 674 { NFSERR_TOOSMALL, -ETOOSMALL }, 675 { NFSERR_SERVERFAULT, -EREMOTEIO }, 676 { NFSERR_BADTYPE, -EBADTYPE }, 677 { NFSERR_JUKEBOX, -EJUKEBOX }, 678 { -1, -EIO } 679 }; 680 681 /* 682 * Convert an NFS error code to a local one. 683 * This one is used jointly by NFSv2 and NFSv3. 684 */ 685 int 686 nfs_stat_to_errno(int stat) 687 { 688 int i; 689 690 for (i = 0; nfs_errtbl[i].stat != -1; i++) { 691 if (nfs_errtbl[i].stat == stat) 692 return nfs_errtbl[i].errno; 693 } 694 dprintk("nfs_stat_to_errno: bad nfs status return value: %d\n", stat); 695 return nfs_errtbl[i].errno; 696 } 697 698 #define PROC(proc, argtype, restype, timer) \ 699 [NFSPROC_##proc] = { \ 700 .p_proc = NFSPROC_##proc, \ 701 .p_encode = (kxdrproc_t) nfs_xdr_##argtype, \ 702 .p_decode = (kxdrproc_t) nfs_xdr_##restype, \ 703 .p_arglen = NFS_##argtype##_sz, \ 704 .p_replen = NFS_##restype##_sz, \ 705 .p_timer = timer, \ 706 .p_statidx = NFSPROC_##proc, \ 707 .p_name = #proc, \ 708 } 709 struct rpc_procinfo nfs_procedures[] = { 710 PROC(GETATTR, fhandle, attrstat, 1), 711 PROC(SETATTR, sattrargs, attrstat, 0), 712 PROC(LOOKUP, diropargs, diropres, 2), 713 PROC(READLINK, readlinkargs, readlinkres, 3), 714 PROC(READ, readargs, readres, 3), 715 PROC(WRITE, writeargs, writeres, 4), 716 PROC(CREATE, createargs, diropres, 0), 717 PROC(REMOVE, removeargs, stat, 0), 718 PROC(RENAME, renameargs, stat, 0), 719 PROC(LINK, linkargs, stat, 0), 720 PROC(SYMLINK, symlinkargs, stat, 0), 721 PROC(MKDIR, createargs, diropres, 0), 722 PROC(RMDIR, diropargs, stat, 0), 723 PROC(READDIR, readdirargs, readdirres, 3), 724 PROC(STATFS, fhandle, statfsres, 0), 725 }; 726 727 struct rpc_version nfs_version2 = { 728 .number = 2, 729 .nrprocs = ARRAY_SIZE(nfs_procedures), 730 .procs = nfs_procedures 731 }; 732