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