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, nr = 0; 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 nr; 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, 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 p = xdr_inline_peek(xdr, 8); 489 if (p != NULL) 490 entry->eof = !p[0] && p[1]; 491 else 492 entry->eof = 0; 493 494 return p; 495 496 out_overflow: 497 print_overflow_msg(__func__, xdr); 498 return ERR_PTR(-EIO); 499 } 500 501 /* 502 * NFS XDR decode functions 503 */ 504 /* 505 * Decode simple status reply 506 */ 507 static int 508 nfs_xdr_stat(struct rpc_rqst *req, __be32 *p, void *dummy) 509 { 510 int status; 511 512 if ((status = ntohl(*p++)) != 0) 513 status = nfs_stat_to_errno(status); 514 return status; 515 } 516 517 /* 518 * Decode attrstat reply 519 * GETATTR, SETATTR, WRITE 520 */ 521 static int 522 nfs_xdr_attrstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) 523 { 524 int status; 525 526 if ((status = ntohl(*p++))) 527 return nfs_stat_to_errno(status); 528 xdr_decode_fattr(p, fattr); 529 return 0; 530 } 531 532 /* 533 * Decode diropres reply 534 * LOOKUP, CREATE, MKDIR 535 */ 536 static int 537 nfs_xdr_diropres(struct rpc_rqst *req, __be32 *p, struct nfs_diropok *res) 538 { 539 int status; 540 541 if ((status = ntohl(*p++))) 542 return nfs_stat_to_errno(status); 543 p = xdr_decode_fhandle(p, res->fh); 544 xdr_decode_fattr(p, res->fattr); 545 return 0; 546 } 547 548 /* 549 * Encode READLINK args 550 */ 551 static int 552 nfs_xdr_readlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs_readlinkargs *args) 553 { 554 struct rpc_auth *auth = req->rq_cred->cr_auth; 555 unsigned int replen; 556 557 p = xdr_encode_fhandle(p, args->fh); 558 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 559 560 /* Inline the page array */ 561 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readlinkres_sz) << 2; 562 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, args->pgbase, args->pglen); 563 return 0; 564 } 565 566 /* 567 * Decode READLINK reply 568 */ 569 static int 570 nfs_xdr_readlinkres(struct rpc_rqst *req, __be32 *p, void *dummy) 571 { 572 struct xdr_buf *rcvbuf = &req->rq_rcv_buf; 573 struct kvec *iov = rcvbuf->head; 574 size_t hdrlen; 575 u32 len, recvd; 576 int status; 577 578 if ((status = ntohl(*p++))) 579 return nfs_stat_to_errno(status); 580 /* Convert length of symlink */ 581 len = ntohl(*p++); 582 if (len >= rcvbuf->page_len) { 583 dprintk("nfs: server returned giant symlink!\n"); 584 return -ENAMETOOLONG; 585 } 586 hdrlen = (u8 *) p - (u8 *) iov->iov_base; 587 if (iov->iov_len < hdrlen) { 588 dprintk("NFS: READLINK reply header overflowed:" 589 "length %Zu > %Zu\n", hdrlen, iov->iov_len); 590 return -errno_NFSERR_IO; 591 } else if (iov->iov_len != hdrlen) { 592 dprintk("NFS: READLINK header is short. iovec will be shifted.\n"); 593 xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen); 594 } 595 recvd = req->rq_rcv_buf.len - hdrlen; 596 if (recvd < len) { 597 dprintk("NFS: server cheating in readlink reply: " 598 "count %u > recvd %u\n", len, recvd); 599 return -EIO; 600 } 601 602 xdr_terminate_string(rcvbuf, len); 603 return 0; 604 } 605 606 /* 607 * Decode WRITE reply 608 */ 609 static int 610 nfs_xdr_writeres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res) 611 { 612 res->verf->committed = NFS_FILE_SYNC; 613 return nfs_xdr_attrstat(req, p, res->fattr); 614 } 615 616 /* 617 * Decode STATFS reply 618 */ 619 static int 620 nfs_xdr_statfsres(struct rpc_rqst *req, __be32 *p, struct nfs2_fsstat *res) 621 { 622 int status; 623 624 if ((status = ntohl(*p++))) 625 return nfs_stat_to_errno(status); 626 627 res->tsize = ntohl(*p++); 628 res->bsize = ntohl(*p++); 629 res->blocks = ntohl(*p++); 630 res->bfree = ntohl(*p++); 631 res->bavail = ntohl(*p++); 632 return 0; 633 } 634 635 /* 636 * We need to translate between nfs status return values and 637 * the local errno values which may not be the same. 638 */ 639 static struct { 640 int stat; 641 int errno; 642 } nfs_errtbl[] = { 643 { NFS_OK, 0 }, 644 { NFSERR_PERM, -EPERM }, 645 { NFSERR_NOENT, -ENOENT }, 646 { NFSERR_IO, -errno_NFSERR_IO}, 647 { NFSERR_NXIO, -ENXIO }, 648 /* { NFSERR_EAGAIN, -EAGAIN }, */ 649 { NFSERR_ACCES, -EACCES }, 650 { NFSERR_EXIST, -EEXIST }, 651 { NFSERR_XDEV, -EXDEV }, 652 { NFSERR_NODEV, -ENODEV }, 653 { NFSERR_NOTDIR, -ENOTDIR }, 654 { NFSERR_ISDIR, -EISDIR }, 655 { NFSERR_INVAL, -EINVAL }, 656 { NFSERR_FBIG, -EFBIG }, 657 { NFSERR_NOSPC, -ENOSPC }, 658 { NFSERR_ROFS, -EROFS }, 659 { NFSERR_MLINK, -EMLINK }, 660 { NFSERR_NAMETOOLONG, -ENAMETOOLONG }, 661 { NFSERR_NOTEMPTY, -ENOTEMPTY }, 662 { NFSERR_DQUOT, -EDQUOT }, 663 { NFSERR_STALE, -ESTALE }, 664 { NFSERR_REMOTE, -EREMOTE }, 665 #ifdef EWFLUSH 666 { NFSERR_WFLUSH, -EWFLUSH }, 667 #endif 668 { NFSERR_BADHANDLE, -EBADHANDLE }, 669 { NFSERR_NOT_SYNC, -ENOTSYNC }, 670 { NFSERR_BAD_COOKIE, -EBADCOOKIE }, 671 { NFSERR_NOTSUPP, -ENOTSUPP }, 672 { NFSERR_TOOSMALL, -ETOOSMALL }, 673 { NFSERR_SERVERFAULT, -EREMOTEIO }, 674 { NFSERR_BADTYPE, -EBADTYPE }, 675 { NFSERR_JUKEBOX, -EJUKEBOX }, 676 { -1, -EIO } 677 }; 678 679 /* 680 * Convert an NFS error code to a local one. 681 * This one is used jointly by NFSv2 and NFSv3. 682 */ 683 int 684 nfs_stat_to_errno(int stat) 685 { 686 int i; 687 688 for (i = 0; nfs_errtbl[i].stat != -1; i++) { 689 if (nfs_errtbl[i].stat == stat) 690 return nfs_errtbl[i].errno; 691 } 692 dprintk("nfs_stat_to_errno: bad nfs status return value: %d\n", stat); 693 return nfs_errtbl[i].errno; 694 } 695 696 #define PROC(proc, argtype, restype, timer) \ 697 [NFSPROC_##proc] = { \ 698 .p_proc = NFSPROC_##proc, \ 699 .p_encode = (kxdrproc_t) nfs_xdr_##argtype, \ 700 .p_decode = (kxdrproc_t) nfs_xdr_##restype, \ 701 .p_arglen = NFS_##argtype##_sz, \ 702 .p_replen = NFS_##restype##_sz, \ 703 .p_timer = timer, \ 704 .p_statidx = NFSPROC_##proc, \ 705 .p_name = #proc, \ 706 } 707 struct rpc_procinfo nfs_procedures[] = { 708 PROC(GETATTR, fhandle, attrstat, 1), 709 PROC(SETATTR, sattrargs, attrstat, 0), 710 PROC(LOOKUP, diropargs, diropres, 2), 711 PROC(READLINK, readlinkargs, readlinkres, 3), 712 PROC(READ, readargs, readres, 3), 713 PROC(WRITE, writeargs, writeres, 4), 714 PROC(CREATE, createargs, diropres, 0), 715 PROC(REMOVE, removeargs, stat, 0), 716 PROC(RENAME, renameargs, stat, 0), 717 PROC(LINK, linkargs, stat, 0), 718 PROC(SYMLINK, symlinkargs, stat, 0), 719 PROC(MKDIR, createargs, diropres, 0), 720 PROC(RMDIR, diropargs, stat, 0), 721 PROC(READDIR, readdirargs, readdirres, 3), 722 PROC(STATFS, fhandle, statfsres, 0), 723 }; 724 725 struct rpc_version nfs_version2 = { 726 .number = 2, 727 .nrprocs = ARRAY_SIZE(nfs_procedures), 728 .procs = nfs_procedures 729 }; 730