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