1 /* 2 * Process version 2 NFS requests. 3 * 4 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> 5 */ 6 7 #include <linux/namei.h> 8 9 #include "cache.h" 10 #include "xdr.h" 11 #include "vfs.h" 12 13 typedef struct svc_rqst svc_rqst; 14 typedef struct svc_buf svc_buf; 15 16 #define NFSDDBG_FACILITY NFSDDBG_PROC 17 18 19 static __be32 20 nfsd_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 21 { 22 return nfs_ok; 23 } 24 25 static __be32 26 nfsd_return_attrs(__be32 err, struct nfsd_attrstat *resp) 27 { 28 if (err) return err; 29 return fh_getattr(&resp->fh, &resp->stat); 30 } 31 static __be32 32 nfsd_return_dirop(__be32 err, struct nfsd_diropres *resp) 33 { 34 if (err) return err; 35 return fh_getattr(&resp->fh, &resp->stat); 36 } 37 /* 38 * Get a file's attributes 39 * N.B. After this call resp->fh needs an fh_put 40 */ 41 static __be32 42 nfsd_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle *argp, 43 struct nfsd_attrstat *resp) 44 { 45 __be32 nfserr; 46 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh)); 47 48 fh_copy(&resp->fh, &argp->fh); 49 nfserr = fh_verify(rqstp, &resp->fh, 0, 50 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); 51 return nfsd_return_attrs(nfserr, resp); 52 } 53 54 /* 55 * Set a file's attributes 56 * N.B. After this call resp->fh needs an fh_put 57 */ 58 static __be32 59 nfsd_proc_setattr(struct svc_rqst *rqstp, struct nfsd_sattrargs *argp, 60 struct nfsd_attrstat *resp) 61 { 62 struct iattr *iap = &argp->attrs; 63 struct svc_fh *fhp; 64 __be32 nfserr; 65 66 dprintk("nfsd: SETATTR %s, valid=%x, size=%ld\n", 67 SVCFH_fmt(&argp->fh), 68 argp->attrs.ia_valid, (long) argp->attrs.ia_size); 69 70 fhp = fh_copy(&resp->fh, &argp->fh); 71 72 /* 73 * NFSv2 does not differentiate between "set-[ac]time-to-now" 74 * which only requires access, and "set-[ac]time-to-X" which 75 * requires ownership. 76 * So if it looks like it might be "set both to the same time which 77 * is close to now", and if inode_change_ok fails, then we 78 * convert to "set to now" instead of "set to explicit time" 79 * 80 * We only call inode_change_ok as the last test as technically 81 * it is not an interface that we should be using. 82 */ 83 #define BOTH_TIME_SET (ATTR_ATIME_SET | ATTR_MTIME_SET) 84 #define MAX_TOUCH_TIME_ERROR (30*60) 85 if ((iap->ia_valid & BOTH_TIME_SET) == BOTH_TIME_SET && 86 iap->ia_mtime.tv_sec == iap->ia_atime.tv_sec) { 87 /* 88 * Looks probable. 89 * 90 * Now just make sure time is in the right ballpark. 91 * Solaris, at least, doesn't seem to care what the time 92 * request is. We require it be within 30 minutes of now. 93 */ 94 time_t delta = iap->ia_atime.tv_sec - get_seconds(); 95 struct inode *inode; 96 97 nfserr = fh_verify(rqstp, fhp, 0, NFSD_MAY_NOP); 98 if (nfserr) 99 goto done; 100 inode = d_inode(fhp->fh_dentry); 101 102 if (delta < 0) 103 delta = -delta; 104 if (delta < MAX_TOUCH_TIME_ERROR && 105 inode_change_ok(inode, iap) != 0) { 106 /* 107 * Turn off ATTR_[AM]TIME_SET but leave ATTR_[AM]TIME. 108 * This will cause notify_change to set these times 109 * to "now" 110 */ 111 iap->ia_valid &= ~BOTH_TIME_SET; 112 } 113 } 114 115 nfserr = nfsd_setattr(rqstp, fhp, iap, 0, (time_t)0); 116 done: 117 return nfsd_return_attrs(nfserr, resp); 118 } 119 120 /* 121 * Look up a path name component 122 * Note: the dentry in the resp->fh may be negative if the file 123 * doesn't exist yet. 124 * N.B. After this call resp->fh needs an fh_put 125 */ 126 static __be32 127 nfsd_proc_lookup(struct svc_rqst *rqstp, struct nfsd_diropargs *argp, 128 struct nfsd_diropres *resp) 129 { 130 __be32 nfserr; 131 132 dprintk("nfsd: LOOKUP %s %.*s\n", 133 SVCFH_fmt(&argp->fh), argp->len, argp->name); 134 135 fh_init(&resp->fh, NFS_FHSIZE); 136 nfserr = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len, 137 &resp->fh); 138 139 fh_put(&argp->fh); 140 return nfsd_return_dirop(nfserr, resp); 141 } 142 143 /* 144 * Read a symlink. 145 */ 146 static __be32 147 nfsd_proc_readlink(struct svc_rqst *rqstp, struct nfsd_readlinkargs *argp, 148 struct nfsd_readlinkres *resp) 149 { 150 __be32 nfserr; 151 152 dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh)); 153 154 /* Read the symlink. */ 155 resp->len = NFS_MAXPATHLEN; 156 nfserr = nfsd_readlink(rqstp, &argp->fh, argp->buffer, &resp->len); 157 158 fh_put(&argp->fh); 159 return nfserr; 160 } 161 162 /* 163 * Read a portion of a file. 164 * N.B. After this call resp->fh needs an fh_put 165 */ 166 static __be32 167 nfsd_proc_read(struct svc_rqst *rqstp, struct nfsd_readargs *argp, 168 struct nfsd_readres *resp) 169 { 170 __be32 nfserr; 171 172 dprintk("nfsd: READ %s %d bytes at %d\n", 173 SVCFH_fmt(&argp->fh), 174 argp->count, argp->offset); 175 176 /* Obtain buffer pointer for payload. 19 is 1 word for 177 * status, 17 words for fattr, and 1 word for the byte count. 178 */ 179 180 if (NFSSVC_MAXBLKSIZE_V2 < argp->count) { 181 char buf[RPC_MAX_ADDRBUFLEN]; 182 printk(KERN_NOTICE 183 "oversized read request from %s (%d bytes)\n", 184 svc_print_addr(rqstp, buf, sizeof(buf)), 185 argp->count); 186 argp->count = NFSSVC_MAXBLKSIZE_V2; 187 } 188 svc_reserve_auth(rqstp, (19<<2) + argp->count + 4); 189 190 resp->count = argp->count; 191 nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh), 192 argp->offset, 193 rqstp->rq_vec, argp->vlen, 194 &resp->count); 195 196 if (nfserr) return nfserr; 197 return fh_getattr(&resp->fh, &resp->stat); 198 } 199 200 /* 201 * Write data to a file 202 * N.B. After this call resp->fh needs an fh_put 203 */ 204 static __be32 205 nfsd_proc_write(struct svc_rqst *rqstp, struct nfsd_writeargs *argp, 206 struct nfsd_attrstat *resp) 207 { 208 __be32 nfserr; 209 int stable = 1; 210 unsigned long cnt = argp->len; 211 212 dprintk("nfsd: WRITE %s %d bytes at %d\n", 213 SVCFH_fmt(&argp->fh), 214 argp->len, argp->offset); 215 216 nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), NULL, 217 argp->offset, 218 rqstp->rq_vec, argp->vlen, 219 &cnt, 220 &stable); 221 return nfsd_return_attrs(nfserr, resp); 222 } 223 224 /* 225 * CREATE processing is complicated. The keyword here is `overloaded.' 226 * The parent directory is kept locked between the check for existence 227 * and the actual create() call in compliance with VFS protocols. 228 * N.B. After this call _both_ argp->fh and resp->fh need an fh_put 229 */ 230 static __be32 231 nfsd_proc_create(struct svc_rqst *rqstp, struct nfsd_createargs *argp, 232 struct nfsd_diropres *resp) 233 { 234 svc_fh *dirfhp = &argp->fh; 235 svc_fh *newfhp = &resp->fh; 236 struct iattr *attr = &argp->attrs; 237 struct inode *inode; 238 struct dentry *dchild; 239 int type, mode; 240 __be32 nfserr; 241 int hosterr; 242 dev_t rdev = 0, wanted = new_decode_dev(attr->ia_size); 243 244 dprintk("nfsd: CREATE %s %.*s\n", 245 SVCFH_fmt(dirfhp), argp->len, argp->name); 246 247 /* First verify the parent file handle */ 248 nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC); 249 if (nfserr) 250 goto done; /* must fh_put dirfhp even on error */ 251 252 /* Check for NFSD_MAY_WRITE in nfsd_create if necessary */ 253 254 nfserr = nfserr_exist; 255 if (isdotent(argp->name, argp->len)) 256 goto done; 257 hosterr = fh_want_write(dirfhp); 258 if (hosterr) { 259 nfserr = nfserrno(hosterr); 260 goto done; 261 } 262 263 fh_lock_nested(dirfhp, I_MUTEX_PARENT); 264 dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len); 265 if (IS_ERR(dchild)) { 266 nfserr = nfserrno(PTR_ERR(dchild)); 267 goto out_unlock; 268 } 269 fh_init(newfhp, NFS_FHSIZE); 270 nfserr = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp); 271 if (!nfserr && d_really_is_negative(dchild)) 272 nfserr = nfserr_noent; 273 dput(dchild); 274 if (nfserr) { 275 if (nfserr != nfserr_noent) 276 goto out_unlock; 277 /* 278 * If the new file handle wasn't verified, we can't tell 279 * whether the file exists or not. Time to bail ... 280 */ 281 nfserr = nfserr_acces; 282 if (!newfhp->fh_dentry) { 283 printk(KERN_WARNING 284 "nfsd_proc_create: file handle not verified\n"); 285 goto out_unlock; 286 } 287 } 288 289 inode = d_inode(newfhp->fh_dentry); 290 291 /* Unfudge the mode bits */ 292 if (attr->ia_valid & ATTR_MODE) { 293 type = attr->ia_mode & S_IFMT; 294 mode = attr->ia_mode & ~S_IFMT; 295 if (!type) { 296 /* no type, so if target exists, assume same as that, 297 * else assume a file */ 298 if (inode) { 299 type = inode->i_mode & S_IFMT; 300 switch(type) { 301 case S_IFCHR: 302 case S_IFBLK: 303 /* reserve rdev for later checking */ 304 rdev = inode->i_rdev; 305 attr->ia_valid |= ATTR_SIZE; 306 307 /* FALLTHROUGH */ 308 case S_IFIFO: 309 /* this is probably a permission check.. 310 * at least IRIX implements perm checking on 311 * echo thing > device-special-file-or-pipe 312 * by doing a CREATE with type==0 313 */ 314 nfserr = nfsd_permission(rqstp, 315 newfhp->fh_export, 316 newfhp->fh_dentry, 317 NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS); 318 if (nfserr && nfserr != nfserr_rofs) 319 goto out_unlock; 320 } 321 } else 322 type = S_IFREG; 323 } 324 } else if (inode) { 325 type = inode->i_mode & S_IFMT; 326 mode = inode->i_mode & ~S_IFMT; 327 } else { 328 type = S_IFREG; 329 mode = 0; /* ??? */ 330 } 331 332 attr->ia_valid |= ATTR_MODE; 333 attr->ia_mode = mode; 334 335 /* Special treatment for non-regular files according to the 336 * gospel of sun micro 337 */ 338 if (type != S_IFREG) { 339 if (type != S_IFBLK && type != S_IFCHR) { 340 rdev = 0; 341 } else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) { 342 /* If you think you've seen the worst, grok this. */ 343 type = S_IFIFO; 344 } else { 345 /* Okay, char or block special */ 346 if (!rdev) 347 rdev = wanted; 348 } 349 350 /* we've used the SIZE information, so discard it */ 351 attr->ia_valid &= ~ATTR_SIZE; 352 353 /* Make sure the type and device matches */ 354 nfserr = nfserr_exist; 355 if (inode && type != (inode->i_mode & S_IFMT)) 356 goto out_unlock; 357 } 358 359 nfserr = 0; 360 if (!inode) { 361 /* File doesn't exist. Create it and set attrs */ 362 nfserr = nfsd_create_locked(rqstp, dirfhp, argp->name, 363 argp->len, attr, type, rdev, newfhp); 364 } else if (type == S_IFREG) { 365 dprintk("nfsd: existing %s, valid=%x, size=%ld\n", 366 argp->name, attr->ia_valid, (long) attr->ia_size); 367 /* File already exists. We ignore all attributes except 368 * size, so that creat() behaves exactly like 369 * open(..., O_CREAT|O_TRUNC|O_WRONLY). 370 */ 371 attr->ia_valid &= ATTR_SIZE; 372 if (attr->ia_valid) 373 nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time_t)0); 374 } 375 376 out_unlock: 377 /* We don't really need to unlock, as fh_put does it. */ 378 fh_unlock(dirfhp); 379 fh_drop_write(dirfhp); 380 done: 381 fh_put(dirfhp); 382 return nfsd_return_dirop(nfserr, resp); 383 } 384 385 static __be32 386 nfsd_proc_remove(struct svc_rqst *rqstp, struct nfsd_diropargs *argp, 387 void *resp) 388 { 389 __be32 nfserr; 390 391 dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh), 392 argp->len, argp->name); 393 394 /* Unlink. -SIFDIR means file must not be a directory */ 395 nfserr = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len); 396 fh_put(&argp->fh); 397 return nfserr; 398 } 399 400 static __be32 401 nfsd_proc_rename(struct svc_rqst *rqstp, struct nfsd_renameargs *argp, 402 void *resp) 403 { 404 __be32 nfserr; 405 406 dprintk("nfsd: RENAME %s %.*s -> \n", 407 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname); 408 dprintk("nfsd: -> %s %.*s\n", 409 SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname); 410 411 nfserr = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen, 412 &argp->tfh, argp->tname, argp->tlen); 413 fh_put(&argp->ffh); 414 fh_put(&argp->tfh); 415 return nfserr; 416 } 417 418 static __be32 419 nfsd_proc_link(struct svc_rqst *rqstp, struct nfsd_linkargs *argp, 420 void *resp) 421 { 422 __be32 nfserr; 423 424 dprintk("nfsd: LINK %s ->\n", 425 SVCFH_fmt(&argp->ffh)); 426 dprintk("nfsd: %s %.*s\n", 427 SVCFH_fmt(&argp->tfh), 428 argp->tlen, 429 argp->tname); 430 431 nfserr = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen, 432 &argp->ffh); 433 fh_put(&argp->ffh); 434 fh_put(&argp->tfh); 435 return nfserr; 436 } 437 438 static __be32 439 nfsd_proc_symlink(struct svc_rqst *rqstp, struct nfsd_symlinkargs *argp, 440 void *resp) 441 { 442 struct svc_fh newfh; 443 __be32 nfserr; 444 445 dprintk("nfsd: SYMLINK %s %.*s -> %.*s\n", 446 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname, 447 argp->tlen, argp->tname); 448 449 fh_init(&newfh, NFS_FHSIZE); 450 /* 451 * Crazy hack: the request fits in a page, and already-decoded 452 * attributes follow argp->tname, so it's safe to just write a 453 * null to ensure it's null-terminated: 454 */ 455 argp->tname[argp->tlen] = '\0'; 456 nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen, 457 argp->tname, &newfh); 458 459 fh_put(&argp->ffh); 460 fh_put(&newfh); 461 return nfserr; 462 } 463 464 /* 465 * Make directory. This operation is not idempotent. 466 * N.B. After this call resp->fh needs an fh_put 467 */ 468 static __be32 469 nfsd_proc_mkdir(struct svc_rqst *rqstp, struct nfsd_createargs *argp, 470 struct nfsd_diropres *resp) 471 { 472 __be32 nfserr; 473 474 dprintk("nfsd: MKDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name); 475 476 if (resp->fh.fh_dentry) { 477 printk(KERN_WARNING 478 "nfsd_proc_mkdir: response already verified??\n"); 479 } 480 481 argp->attrs.ia_valid &= ~ATTR_SIZE; 482 fh_init(&resp->fh, NFS_FHSIZE); 483 nfserr = nfsd_create(rqstp, &argp->fh, argp->name, argp->len, 484 &argp->attrs, S_IFDIR, 0, &resp->fh); 485 fh_put(&argp->fh); 486 return nfsd_return_dirop(nfserr, resp); 487 } 488 489 /* 490 * Remove a directory 491 */ 492 static __be32 493 nfsd_proc_rmdir(struct svc_rqst *rqstp, struct nfsd_diropargs *argp, 494 void *resp) 495 { 496 __be32 nfserr; 497 498 dprintk("nfsd: RMDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name); 499 500 nfserr = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, argp->name, argp->len); 501 fh_put(&argp->fh); 502 return nfserr; 503 } 504 505 /* 506 * Read a portion of a directory. 507 */ 508 static __be32 509 nfsd_proc_readdir(struct svc_rqst *rqstp, struct nfsd_readdirargs *argp, 510 struct nfsd_readdirres *resp) 511 { 512 int count; 513 __be32 nfserr; 514 loff_t offset; 515 516 dprintk("nfsd: READDIR %s %d bytes at %d\n", 517 SVCFH_fmt(&argp->fh), 518 argp->count, argp->cookie); 519 520 /* Shrink to the client read size */ 521 count = (argp->count >> 2) - 2; 522 523 /* Make sure we've room for the NULL ptr & eof flag */ 524 count -= 2; 525 if (count < 0) 526 count = 0; 527 528 resp->buffer = argp->buffer; 529 resp->offset = NULL; 530 resp->buflen = count; 531 resp->common.err = nfs_ok; 532 /* Read directory and encode entries on the fly */ 533 offset = argp->cookie; 534 nfserr = nfsd_readdir(rqstp, &argp->fh, &offset, 535 &resp->common, nfssvc_encode_entry); 536 537 resp->count = resp->buffer - argp->buffer; 538 if (resp->offset) 539 *resp->offset = htonl(offset); 540 541 fh_put(&argp->fh); 542 return nfserr; 543 } 544 545 /* 546 * Get file system info 547 */ 548 static __be32 549 nfsd_proc_statfs(struct svc_rqst * rqstp, struct nfsd_fhandle *argp, 550 struct nfsd_statfsres *resp) 551 { 552 __be32 nfserr; 553 554 dprintk("nfsd: STATFS %s\n", SVCFH_fmt(&argp->fh)); 555 556 nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 557 NFSD_MAY_BYPASS_GSS_ON_ROOT); 558 fh_put(&argp->fh); 559 return nfserr; 560 } 561 562 /* 563 * NFSv2 Server procedures. 564 * Only the results of non-idempotent operations are cached. 565 */ 566 struct nfsd_void { int dummy; }; 567 568 #define ST 1 /* status */ 569 #define FH 8 /* filehandle */ 570 #define AT 18 /* attributes */ 571 572 static struct svc_procedure nfsd_procedures2[18] = { 573 [NFSPROC_NULL] = { 574 .pc_func = (svc_procfunc) nfsd_proc_null, 575 .pc_decode = (kxdrproc_t) nfssvc_decode_void, 576 .pc_encode = (kxdrproc_t) nfssvc_encode_void, 577 .pc_argsize = sizeof(struct nfsd_void), 578 .pc_ressize = sizeof(struct nfsd_void), 579 .pc_cachetype = RC_NOCACHE, 580 .pc_xdrressize = ST, 581 }, 582 [NFSPROC_GETATTR] = { 583 .pc_func = (svc_procfunc) nfsd_proc_getattr, 584 .pc_decode = (kxdrproc_t) nfssvc_decode_fhandle, 585 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat, 586 .pc_release = (kxdrproc_t) nfssvc_release_fhandle, 587 .pc_argsize = sizeof(struct nfsd_fhandle), 588 .pc_ressize = sizeof(struct nfsd_attrstat), 589 .pc_cachetype = RC_NOCACHE, 590 .pc_xdrressize = ST+AT, 591 }, 592 [NFSPROC_SETATTR] = { 593 .pc_func = (svc_procfunc) nfsd_proc_setattr, 594 .pc_decode = (kxdrproc_t) nfssvc_decode_sattrargs, 595 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat, 596 .pc_release = (kxdrproc_t) nfssvc_release_fhandle, 597 .pc_argsize = sizeof(struct nfsd_sattrargs), 598 .pc_ressize = sizeof(struct nfsd_attrstat), 599 .pc_cachetype = RC_REPLBUFF, 600 .pc_xdrressize = ST+AT, 601 }, 602 [NFSPROC_ROOT] = { 603 .pc_decode = (kxdrproc_t) nfssvc_decode_void, 604 .pc_encode = (kxdrproc_t) nfssvc_encode_void, 605 .pc_argsize = sizeof(struct nfsd_void), 606 .pc_ressize = sizeof(struct nfsd_void), 607 .pc_cachetype = RC_NOCACHE, 608 .pc_xdrressize = ST, 609 }, 610 [NFSPROC_LOOKUP] = { 611 .pc_func = (svc_procfunc) nfsd_proc_lookup, 612 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs, 613 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres, 614 .pc_release = (kxdrproc_t) nfssvc_release_fhandle, 615 .pc_argsize = sizeof(struct nfsd_diropargs), 616 .pc_ressize = sizeof(struct nfsd_diropres), 617 .pc_cachetype = RC_NOCACHE, 618 .pc_xdrressize = ST+FH+AT, 619 }, 620 [NFSPROC_READLINK] = { 621 .pc_func = (svc_procfunc) nfsd_proc_readlink, 622 .pc_decode = (kxdrproc_t) nfssvc_decode_readlinkargs, 623 .pc_encode = (kxdrproc_t) nfssvc_encode_readlinkres, 624 .pc_argsize = sizeof(struct nfsd_readlinkargs), 625 .pc_ressize = sizeof(struct nfsd_readlinkres), 626 .pc_cachetype = RC_NOCACHE, 627 .pc_xdrressize = ST+1+NFS_MAXPATHLEN/4, 628 }, 629 [NFSPROC_READ] = { 630 .pc_func = (svc_procfunc) nfsd_proc_read, 631 .pc_decode = (kxdrproc_t) nfssvc_decode_readargs, 632 .pc_encode = (kxdrproc_t) nfssvc_encode_readres, 633 .pc_release = (kxdrproc_t) nfssvc_release_fhandle, 634 .pc_argsize = sizeof(struct nfsd_readargs), 635 .pc_ressize = sizeof(struct nfsd_readres), 636 .pc_cachetype = RC_NOCACHE, 637 .pc_xdrressize = ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4, 638 }, 639 [NFSPROC_WRITECACHE] = { 640 .pc_decode = (kxdrproc_t) nfssvc_decode_void, 641 .pc_encode = (kxdrproc_t) nfssvc_encode_void, 642 .pc_argsize = sizeof(struct nfsd_void), 643 .pc_ressize = sizeof(struct nfsd_void), 644 .pc_cachetype = RC_NOCACHE, 645 .pc_xdrressize = ST, 646 }, 647 [NFSPROC_WRITE] = { 648 .pc_func = (svc_procfunc) nfsd_proc_write, 649 .pc_decode = (kxdrproc_t) nfssvc_decode_writeargs, 650 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat, 651 .pc_release = (kxdrproc_t) nfssvc_release_fhandle, 652 .pc_argsize = sizeof(struct nfsd_writeargs), 653 .pc_ressize = sizeof(struct nfsd_attrstat), 654 .pc_cachetype = RC_REPLBUFF, 655 .pc_xdrressize = ST+AT, 656 }, 657 [NFSPROC_CREATE] = { 658 .pc_func = (svc_procfunc) nfsd_proc_create, 659 .pc_decode = (kxdrproc_t) nfssvc_decode_createargs, 660 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres, 661 .pc_release = (kxdrproc_t) nfssvc_release_fhandle, 662 .pc_argsize = sizeof(struct nfsd_createargs), 663 .pc_ressize = sizeof(struct nfsd_diropres), 664 .pc_cachetype = RC_REPLBUFF, 665 .pc_xdrressize = ST+FH+AT, 666 }, 667 [NFSPROC_REMOVE] = { 668 .pc_func = (svc_procfunc) nfsd_proc_remove, 669 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs, 670 .pc_encode = (kxdrproc_t) nfssvc_encode_void, 671 .pc_argsize = sizeof(struct nfsd_diropargs), 672 .pc_ressize = sizeof(struct nfsd_void), 673 .pc_cachetype = RC_REPLSTAT, 674 .pc_xdrressize = ST, 675 }, 676 [NFSPROC_RENAME] = { 677 .pc_func = (svc_procfunc) nfsd_proc_rename, 678 .pc_decode = (kxdrproc_t) nfssvc_decode_renameargs, 679 .pc_encode = (kxdrproc_t) nfssvc_encode_void, 680 .pc_argsize = sizeof(struct nfsd_renameargs), 681 .pc_ressize = sizeof(struct nfsd_void), 682 .pc_cachetype = RC_REPLSTAT, 683 .pc_xdrressize = ST, 684 }, 685 [NFSPROC_LINK] = { 686 .pc_func = (svc_procfunc) nfsd_proc_link, 687 .pc_decode = (kxdrproc_t) nfssvc_decode_linkargs, 688 .pc_encode = (kxdrproc_t) nfssvc_encode_void, 689 .pc_argsize = sizeof(struct nfsd_linkargs), 690 .pc_ressize = sizeof(struct nfsd_void), 691 .pc_cachetype = RC_REPLSTAT, 692 .pc_xdrressize = ST, 693 }, 694 [NFSPROC_SYMLINK] = { 695 .pc_func = (svc_procfunc) nfsd_proc_symlink, 696 .pc_decode = (kxdrproc_t) nfssvc_decode_symlinkargs, 697 .pc_encode = (kxdrproc_t) nfssvc_encode_void, 698 .pc_argsize = sizeof(struct nfsd_symlinkargs), 699 .pc_ressize = sizeof(struct nfsd_void), 700 .pc_cachetype = RC_REPLSTAT, 701 .pc_xdrressize = ST, 702 }, 703 [NFSPROC_MKDIR] = { 704 .pc_func = (svc_procfunc) nfsd_proc_mkdir, 705 .pc_decode = (kxdrproc_t) nfssvc_decode_createargs, 706 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres, 707 .pc_release = (kxdrproc_t) nfssvc_release_fhandle, 708 .pc_argsize = sizeof(struct nfsd_createargs), 709 .pc_ressize = sizeof(struct nfsd_diropres), 710 .pc_cachetype = RC_REPLBUFF, 711 .pc_xdrressize = ST+FH+AT, 712 }, 713 [NFSPROC_RMDIR] = { 714 .pc_func = (svc_procfunc) nfsd_proc_rmdir, 715 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs, 716 .pc_encode = (kxdrproc_t) nfssvc_encode_void, 717 .pc_argsize = sizeof(struct nfsd_diropargs), 718 .pc_ressize = sizeof(struct nfsd_void), 719 .pc_cachetype = RC_REPLSTAT, 720 .pc_xdrressize = ST, 721 }, 722 [NFSPROC_READDIR] = { 723 .pc_func = (svc_procfunc) nfsd_proc_readdir, 724 .pc_decode = (kxdrproc_t) nfssvc_decode_readdirargs, 725 .pc_encode = (kxdrproc_t) nfssvc_encode_readdirres, 726 .pc_argsize = sizeof(struct nfsd_readdirargs), 727 .pc_ressize = sizeof(struct nfsd_readdirres), 728 .pc_cachetype = RC_NOCACHE, 729 }, 730 [NFSPROC_STATFS] = { 731 .pc_func = (svc_procfunc) nfsd_proc_statfs, 732 .pc_decode = (kxdrproc_t) nfssvc_decode_fhandle, 733 .pc_encode = (kxdrproc_t) nfssvc_encode_statfsres, 734 .pc_argsize = sizeof(struct nfsd_fhandle), 735 .pc_ressize = sizeof(struct nfsd_statfsres), 736 .pc_cachetype = RC_NOCACHE, 737 .pc_xdrressize = ST+5, 738 }, 739 }; 740 741 742 struct svc_version nfsd_version2 = { 743 .vs_vers = 2, 744 .vs_nproc = 18, 745 .vs_proc = nfsd_procedures2, 746 .vs_dispatch = nfsd_dispatch, 747 .vs_xdrsize = NFS2_SVC_XDRSIZE, 748 }; 749 750 /* 751 * Map errnos to NFS errnos. 752 */ 753 __be32 754 nfserrno (int errno) 755 { 756 static struct { 757 __be32 nfserr; 758 int syserr; 759 } nfs_errtbl[] = { 760 { nfs_ok, 0 }, 761 { nfserr_perm, -EPERM }, 762 { nfserr_noent, -ENOENT }, 763 { nfserr_io, -EIO }, 764 { nfserr_nxio, -ENXIO }, 765 { nfserr_fbig, -E2BIG }, 766 { nfserr_acces, -EACCES }, 767 { nfserr_exist, -EEXIST }, 768 { nfserr_xdev, -EXDEV }, 769 { nfserr_mlink, -EMLINK }, 770 { nfserr_nodev, -ENODEV }, 771 { nfserr_notdir, -ENOTDIR }, 772 { nfserr_isdir, -EISDIR }, 773 { nfserr_inval, -EINVAL }, 774 { nfserr_fbig, -EFBIG }, 775 { nfserr_nospc, -ENOSPC }, 776 { nfserr_rofs, -EROFS }, 777 { nfserr_mlink, -EMLINK }, 778 { nfserr_nametoolong, -ENAMETOOLONG }, 779 { nfserr_notempty, -ENOTEMPTY }, 780 #ifdef EDQUOT 781 { nfserr_dquot, -EDQUOT }, 782 #endif 783 { nfserr_stale, -ESTALE }, 784 { nfserr_jukebox, -ETIMEDOUT }, 785 { nfserr_jukebox, -ERESTARTSYS }, 786 { nfserr_jukebox, -EAGAIN }, 787 { nfserr_jukebox, -EWOULDBLOCK }, 788 { nfserr_jukebox, -ENOMEM }, 789 { nfserr_io, -ETXTBSY }, 790 { nfserr_notsupp, -EOPNOTSUPP }, 791 { nfserr_toosmall, -ETOOSMALL }, 792 { nfserr_serverfault, -ESERVERFAULT }, 793 { nfserr_serverfault, -ENFILE }, 794 }; 795 int i; 796 797 for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) { 798 if (nfs_errtbl[i].syserr == errno) 799 return nfs_errtbl[i].nfserr; 800 } 801 WARN(1, "nfsd: non-standard errno: %d\n", errno); 802 return nfserr_io; 803 } 804 805