1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Process version 2 NFS requests. 4 * 5 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> 6 */ 7 8 #include <linux/namei.h> 9 10 #include "cache.h" 11 #include "xdr.h" 12 #include "vfs.h" 13 14 #define NFSDDBG_FACILITY NFSDDBG_PROC 15 16 static __be32 17 nfsd_proc_null(struct svc_rqst *rqstp) 18 { 19 return rpc_success; 20 } 21 22 /* 23 * Get a file's attributes 24 * N.B. After this call resp->fh needs an fh_put 25 */ 26 static __be32 27 nfsd_proc_getattr(struct svc_rqst *rqstp) 28 { 29 struct nfsd_fhandle *argp = rqstp->rq_argp; 30 struct nfsd_attrstat *resp = rqstp->rq_resp; 31 32 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh)); 33 34 fh_copy(&resp->fh, &argp->fh); 35 resp->status = fh_verify(rqstp, &resp->fh, 0, 36 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); 37 if (resp->status != nfs_ok) 38 goto out; 39 resp->status = fh_getattr(&resp->fh, &resp->stat); 40 out: 41 return rpc_success; 42 } 43 44 /* 45 * Set a file's attributes 46 * N.B. After this call resp->fh needs an fh_put 47 */ 48 static __be32 49 nfsd_proc_setattr(struct svc_rqst *rqstp) 50 { 51 struct nfsd_sattrargs *argp = rqstp->rq_argp; 52 struct nfsd_attrstat *resp = rqstp->rq_resp; 53 struct iattr *iap = &argp->attrs; 54 struct svc_fh *fhp; 55 56 dprintk("nfsd: SETATTR %s, valid=%x, size=%ld\n", 57 SVCFH_fmt(&argp->fh), 58 argp->attrs.ia_valid, (long) argp->attrs.ia_size); 59 60 fhp = fh_copy(&resp->fh, &argp->fh); 61 62 /* 63 * NFSv2 does not differentiate between "set-[ac]time-to-now" 64 * which only requires access, and "set-[ac]time-to-X" which 65 * requires ownership. 66 * So if it looks like it might be "set both to the same time which 67 * is close to now", and if setattr_prepare fails, then we 68 * convert to "set to now" instead of "set to explicit time" 69 * 70 * We only call setattr_prepare as the last test as technically 71 * it is not an interface that we should be using. 72 */ 73 #define BOTH_TIME_SET (ATTR_ATIME_SET | ATTR_MTIME_SET) 74 #define MAX_TOUCH_TIME_ERROR (30*60) 75 if ((iap->ia_valid & BOTH_TIME_SET) == BOTH_TIME_SET && 76 iap->ia_mtime.tv_sec == iap->ia_atime.tv_sec) { 77 /* 78 * Looks probable. 79 * 80 * Now just make sure time is in the right ballpark. 81 * Solaris, at least, doesn't seem to care what the time 82 * request is. We require it be within 30 minutes of now. 83 */ 84 time64_t delta = iap->ia_atime.tv_sec - ktime_get_real_seconds(); 85 86 resp->status = fh_verify(rqstp, fhp, 0, NFSD_MAY_NOP); 87 if (resp->status != nfs_ok) 88 goto out; 89 90 if (delta < 0) 91 delta = -delta; 92 if (delta < MAX_TOUCH_TIME_ERROR && 93 setattr_prepare(&init_user_ns, fhp->fh_dentry, iap) != 0) { 94 /* 95 * Turn off ATTR_[AM]TIME_SET but leave ATTR_[AM]TIME. 96 * This will cause notify_change to set these times 97 * to "now" 98 */ 99 iap->ia_valid &= ~BOTH_TIME_SET; 100 } 101 } 102 103 resp->status = nfsd_setattr(rqstp, fhp, iap, 0, (time64_t)0); 104 if (resp->status != nfs_ok) 105 goto out; 106 107 resp->status = fh_getattr(&resp->fh, &resp->stat); 108 out: 109 return rpc_success; 110 } 111 112 /* Obsolete, replaced by MNTPROC_MNT. */ 113 static __be32 114 nfsd_proc_root(struct svc_rqst *rqstp) 115 { 116 return rpc_success; 117 } 118 119 /* 120 * Look up a path name component 121 * Note: the dentry in the resp->fh may be negative if the file 122 * doesn't exist yet. 123 * N.B. After this call resp->fh needs an fh_put 124 */ 125 static __be32 126 nfsd_proc_lookup(struct svc_rqst *rqstp) 127 { 128 struct nfsd_diropargs *argp = rqstp->rq_argp; 129 struct nfsd_diropres *resp = rqstp->rq_resp; 130 131 dprintk("nfsd: LOOKUP %s %.*s\n", 132 SVCFH_fmt(&argp->fh), argp->len, argp->name); 133 134 fh_init(&resp->fh, NFS_FHSIZE); 135 resp->status = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len, 136 &resp->fh); 137 fh_put(&argp->fh); 138 if (resp->status != nfs_ok) 139 goto out; 140 141 resp->status = fh_getattr(&resp->fh, &resp->stat); 142 out: 143 return rpc_success; 144 } 145 146 /* 147 * Read a symlink. 148 */ 149 static __be32 150 nfsd_proc_readlink(struct svc_rqst *rqstp) 151 { 152 struct nfsd_fhandle *argp = rqstp->rq_argp; 153 struct nfsd_readlinkres *resp = rqstp->rq_resp; 154 char *buffer = page_address(*(rqstp->rq_next_page++)); 155 156 dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh)); 157 158 /* Read the symlink. */ 159 resp->len = NFS_MAXPATHLEN; 160 resp->status = nfsd_readlink(rqstp, &argp->fh, buffer, &resp->len); 161 162 fh_put(&argp->fh); 163 return rpc_success; 164 } 165 166 /* 167 * Read a portion of a file. 168 * N.B. After this call resp->fh needs an fh_put 169 */ 170 static __be32 171 nfsd_proc_read(struct svc_rqst *rqstp) 172 { 173 struct nfsd_readargs *argp = rqstp->rq_argp; 174 struct nfsd_readres *resp = rqstp->rq_resp; 175 unsigned int len; 176 u32 eof; 177 int v; 178 179 dprintk("nfsd: READ %s %d bytes at %d\n", 180 SVCFH_fmt(&argp->fh), 181 argp->count, argp->offset); 182 183 argp->count = min_t(u32, argp->count, NFSSVC_MAXBLKSIZE_V2); 184 185 v = 0; 186 len = argp->count; 187 while (len > 0) { 188 struct page *page = *(rqstp->rq_next_page++); 189 190 rqstp->rq_vec[v].iov_base = page_address(page); 191 rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE); 192 len -= rqstp->rq_vec[v].iov_len; 193 v++; 194 } 195 196 /* Obtain buffer pointer for payload. 19 is 1 word for 197 * status, 17 words for fattr, and 1 word for the byte count. 198 */ 199 svc_reserve_auth(rqstp, (19<<2) + argp->count + 4); 200 201 resp->count = argp->count; 202 fh_copy(&resp->fh, &argp->fh); 203 resp->status = nfsd_read(rqstp, &resp->fh, argp->offset, 204 rqstp->rq_vec, v, &resp->count, &eof); 205 if (resp->status == nfs_ok) 206 resp->status = fh_getattr(&resp->fh, &resp->stat); 207 else if (resp->status == nfserr_jukebox) 208 return rpc_drop_reply; 209 return rpc_success; 210 } 211 212 /* Reserved */ 213 static __be32 214 nfsd_proc_writecache(struct svc_rqst *rqstp) 215 { 216 return rpc_success; 217 } 218 219 /* 220 * Write data to a file 221 * N.B. After this call resp->fh needs an fh_put 222 */ 223 static __be32 224 nfsd_proc_write(struct svc_rqst *rqstp) 225 { 226 struct nfsd_writeargs *argp = rqstp->rq_argp; 227 struct nfsd_attrstat *resp = rqstp->rq_resp; 228 unsigned long cnt = argp->len; 229 unsigned int nvecs; 230 231 dprintk("nfsd: WRITE %s %d bytes at %d\n", 232 SVCFH_fmt(&argp->fh), 233 argp->len, argp->offset); 234 235 nvecs = svc_fill_write_vector(rqstp, rqstp->rq_arg.pages, 236 &argp->first, cnt); 237 if (!nvecs) { 238 resp->status = nfserr_io; 239 goto out; 240 } 241 242 resp->status = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), 243 argp->offset, rqstp->rq_vec, nvecs, 244 &cnt, NFS_DATA_SYNC, NULL); 245 if (resp->status == nfs_ok) 246 resp->status = fh_getattr(&resp->fh, &resp->stat); 247 else if (resp->status == nfserr_jukebox) 248 return rpc_drop_reply; 249 out: 250 return rpc_success; 251 } 252 253 /* 254 * CREATE processing is complicated. The keyword here is `overloaded.' 255 * The parent directory is kept locked between the check for existence 256 * and the actual create() call in compliance with VFS protocols. 257 * N.B. After this call _both_ argp->fh and resp->fh need an fh_put 258 */ 259 static __be32 260 nfsd_proc_create(struct svc_rqst *rqstp) 261 { 262 struct nfsd_createargs *argp = rqstp->rq_argp; 263 struct nfsd_diropres *resp = rqstp->rq_resp; 264 svc_fh *dirfhp = &argp->fh; 265 svc_fh *newfhp = &resp->fh; 266 struct iattr *attr = &argp->attrs; 267 struct inode *inode; 268 struct dentry *dchild; 269 int type, mode; 270 int hosterr; 271 dev_t rdev = 0, wanted = new_decode_dev(attr->ia_size); 272 273 dprintk("nfsd: CREATE %s %.*s\n", 274 SVCFH_fmt(dirfhp), argp->len, argp->name); 275 276 /* First verify the parent file handle */ 277 resp->status = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC); 278 if (resp->status != nfs_ok) 279 goto done; /* must fh_put dirfhp even on error */ 280 281 /* Check for NFSD_MAY_WRITE in nfsd_create if necessary */ 282 283 resp->status = nfserr_exist; 284 if (isdotent(argp->name, argp->len)) 285 goto done; 286 hosterr = fh_want_write(dirfhp); 287 if (hosterr) { 288 resp->status = nfserrno(hosterr); 289 goto done; 290 } 291 292 fh_lock_nested(dirfhp, I_MUTEX_PARENT); 293 dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len); 294 if (IS_ERR(dchild)) { 295 resp->status = nfserrno(PTR_ERR(dchild)); 296 goto out_unlock; 297 } 298 fh_init(newfhp, NFS_FHSIZE); 299 resp->status = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp); 300 if (!resp->status && d_really_is_negative(dchild)) 301 resp->status = nfserr_noent; 302 dput(dchild); 303 if (resp->status) { 304 if (resp->status != nfserr_noent) 305 goto out_unlock; 306 /* 307 * If the new file handle wasn't verified, we can't tell 308 * whether the file exists or not. Time to bail ... 309 */ 310 resp->status = nfserr_acces; 311 if (!newfhp->fh_dentry) { 312 printk(KERN_WARNING 313 "nfsd_proc_create: file handle not verified\n"); 314 goto out_unlock; 315 } 316 } 317 318 inode = d_inode(newfhp->fh_dentry); 319 320 /* Unfudge the mode bits */ 321 if (attr->ia_valid & ATTR_MODE) { 322 type = attr->ia_mode & S_IFMT; 323 mode = attr->ia_mode & ~S_IFMT; 324 if (!type) { 325 /* no type, so if target exists, assume same as that, 326 * else assume a file */ 327 if (inode) { 328 type = inode->i_mode & S_IFMT; 329 switch(type) { 330 case S_IFCHR: 331 case S_IFBLK: 332 /* reserve rdev for later checking */ 333 rdev = inode->i_rdev; 334 attr->ia_valid |= ATTR_SIZE; 335 336 fallthrough; 337 case S_IFIFO: 338 /* this is probably a permission check.. 339 * at least IRIX implements perm checking on 340 * echo thing > device-special-file-or-pipe 341 * by doing a CREATE with type==0 342 */ 343 resp->status = nfsd_permission(rqstp, 344 newfhp->fh_export, 345 newfhp->fh_dentry, 346 NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS); 347 if (resp->status && resp->status != nfserr_rofs) 348 goto out_unlock; 349 } 350 } else 351 type = S_IFREG; 352 } 353 } else if (inode) { 354 type = inode->i_mode & S_IFMT; 355 mode = inode->i_mode & ~S_IFMT; 356 } else { 357 type = S_IFREG; 358 mode = 0; /* ??? */ 359 } 360 361 attr->ia_valid |= ATTR_MODE; 362 attr->ia_mode = mode; 363 364 /* Special treatment for non-regular files according to the 365 * gospel of sun micro 366 */ 367 if (type != S_IFREG) { 368 if (type != S_IFBLK && type != S_IFCHR) { 369 rdev = 0; 370 } else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) { 371 /* If you think you've seen the worst, grok this. */ 372 type = S_IFIFO; 373 } else { 374 /* Okay, char or block special */ 375 if (!rdev) 376 rdev = wanted; 377 } 378 379 /* we've used the SIZE information, so discard it */ 380 attr->ia_valid &= ~ATTR_SIZE; 381 382 /* Make sure the type and device matches */ 383 resp->status = nfserr_exist; 384 if (inode && type != (inode->i_mode & S_IFMT)) 385 goto out_unlock; 386 } 387 388 resp->status = nfs_ok; 389 if (!inode) { 390 /* File doesn't exist. Create it and set attrs */ 391 resp->status = nfsd_create_locked(rqstp, dirfhp, argp->name, 392 argp->len, attr, type, rdev, 393 newfhp); 394 } else if (type == S_IFREG) { 395 dprintk("nfsd: existing %s, valid=%x, size=%ld\n", 396 argp->name, attr->ia_valid, (long) attr->ia_size); 397 /* File already exists. We ignore all attributes except 398 * size, so that creat() behaves exactly like 399 * open(..., O_CREAT|O_TRUNC|O_WRONLY). 400 */ 401 attr->ia_valid &= ATTR_SIZE; 402 if (attr->ia_valid) 403 resp->status = nfsd_setattr(rqstp, newfhp, attr, 0, 404 (time64_t)0); 405 } 406 407 out_unlock: 408 /* We don't really need to unlock, as fh_put does it. */ 409 fh_unlock(dirfhp); 410 fh_drop_write(dirfhp); 411 done: 412 fh_put(dirfhp); 413 if (resp->status != nfs_ok) 414 goto out; 415 resp->status = fh_getattr(&resp->fh, &resp->stat); 416 out: 417 return rpc_success; 418 } 419 420 static __be32 421 nfsd_proc_remove(struct svc_rqst *rqstp) 422 { 423 struct nfsd_diropargs *argp = rqstp->rq_argp; 424 struct nfsd_stat *resp = rqstp->rq_resp; 425 426 dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh), 427 argp->len, argp->name); 428 429 /* Unlink. -SIFDIR means file must not be a directory */ 430 resp->status = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, 431 argp->name, argp->len); 432 fh_put(&argp->fh); 433 return rpc_success; 434 } 435 436 static __be32 437 nfsd_proc_rename(struct svc_rqst *rqstp) 438 { 439 struct nfsd_renameargs *argp = rqstp->rq_argp; 440 struct nfsd_stat *resp = rqstp->rq_resp; 441 442 dprintk("nfsd: RENAME %s %.*s -> \n", 443 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname); 444 dprintk("nfsd: -> %s %.*s\n", 445 SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname); 446 447 resp->status = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen, 448 &argp->tfh, argp->tname, argp->tlen); 449 fh_put(&argp->ffh); 450 fh_put(&argp->tfh); 451 return rpc_success; 452 } 453 454 static __be32 455 nfsd_proc_link(struct svc_rqst *rqstp) 456 { 457 struct nfsd_linkargs *argp = rqstp->rq_argp; 458 struct nfsd_stat *resp = rqstp->rq_resp; 459 460 dprintk("nfsd: LINK %s ->\n", 461 SVCFH_fmt(&argp->ffh)); 462 dprintk("nfsd: %s %.*s\n", 463 SVCFH_fmt(&argp->tfh), 464 argp->tlen, 465 argp->tname); 466 467 resp->status = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen, 468 &argp->ffh); 469 fh_put(&argp->ffh); 470 fh_put(&argp->tfh); 471 return rpc_success; 472 } 473 474 static __be32 475 nfsd_proc_symlink(struct svc_rqst *rqstp) 476 { 477 struct nfsd_symlinkargs *argp = rqstp->rq_argp; 478 struct nfsd_stat *resp = rqstp->rq_resp; 479 struct svc_fh newfh; 480 481 if (argp->tlen > NFS_MAXPATHLEN) { 482 resp->status = nfserr_nametoolong; 483 goto out; 484 } 485 486 argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first, 487 page_address(rqstp->rq_arg.pages[0]), 488 argp->tlen); 489 if (IS_ERR(argp->tname)) { 490 resp->status = nfserrno(PTR_ERR(argp->tname)); 491 goto out; 492 } 493 494 dprintk("nfsd: SYMLINK %s %.*s -> %.*s\n", 495 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname, 496 argp->tlen, argp->tname); 497 498 fh_init(&newfh, NFS_FHSIZE); 499 resp->status = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen, 500 argp->tname, &newfh); 501 502 kfree(argp->tname); 503 fh_put(&argp->ffh); 504 fh_put(&newfh); 505 out: 506 return rpc_success; 507 } 508 509 /* 510 * Make directory. This operation is not idempotent. 511 * N.B. After this call resp->fh needs an fh_put 512 */ 513 static __be32 514 nfsd_proc_mkdir(struct svc_rqst *rqstp) 515 { 516 struct nfsd_createargs *argp = rqstp->rq_argp; 517 struct nfsd_diropres *resp = rqstp->rq_resp; 518 519 dprintk("nfsd: MKDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name); 520 521 if (resp->fh.fh_dentry) { 522 printk(KERN_WARNING 523 "nfsd_proc_mkdir: response already verified??\n"); 524 } 525 526 argp->attrs.ia_valid &= ~ATTR_SIZE; 527 fh_init(&resp->fh, NFS_FHSIZE); 528 resp->status = nfsd_create(rqstp, &argp->fh, argp->name, argp->len, 529 &argp->attrs, S_IFDIR, 0, &resp->fh); 530 fh_put(&argp->fh); 531 if (resp->status != nfs_ok) 532 goto out; 533 534 resp->status = fh_getattr(&resp->fh, &resp->stat); 535 out: 536 return rpc_success; 537 } 538 539 /* 540 * Remove a directory 541 */ 542 static __be32 543 nfsd_proc_rmdir(struct svc_rqst *rqstp) 544 { 545 struct nfsd_diropargs *argp = rqstp->rq_argp; 546 struct nfsd_stat *resp = rqstp->rq_resp; 547 548 dprintk("nfsd: RMDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name); 549 550 resp->status = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, 551 argp->name, argp->len); 552 fh_put(&argp->fh); 553 return rpc_success; 554 } 555 556 static void nfsd_init_dirlist_pages(struct svc_rqst *rqstp, 557 struct nfsd_readdirres *resp, 558 int count) 559 { 560 count = min_t(u32, count, PAGE_SIZE); 561 562 /* Convert byte count to number of words (i.e. >> 2), 563 * and reserve room for the NULL ptr & eof flag (-2 words) */ 564 resp->buflen = (count >> 2) - 2; 565 566 resp->buffer = page_address(*rqstp->rq_next_page); 567 rqstp->rq_next_page++; 568 } 569 570 /* 571 * Read a portion of a directory. 572 */ 573 static __be32 574 nfsd_proc_readdir(struct svc_rqst *rqstp) 575 { 576 struct nfsd_readdirargs *argp = rqstp->rq_argp; 577 struct nfsd_readdirres *resp = rqstp->rq_resp; 578 loff_t offset; 579 __be32 *buffer; 580 581 dprintk("nfsd: READDIR %s %d bytes at %d\n", 582 SVCFH_fmt(&argp->fh), 583 argp->count, argp->cookie); 584 585 nfsd_init_dirlist_pages(rqstp, resp, argp->count); 586 buffer = resp->buffer; 587 588 resp->offset = NULL; 589 resp->common.err = nfs_ok; 590 /* Read directory and encode entries on the fly */ 591 offset = argp->cookie; 592 resp->status = nfsd_readdir(rqstp, &argp->fh, &offset, 593 &resp->common, nfssvc_encode_entry); 594 595 resp->count = resp->buffer - buffer; 596 if (resp->offset) 597 *resp->offset = htonl(offset); 598 599 fh_put(&argp->fh); 600 return rpc_success; 601 } 602 603 /* 604 * Get file system info 605 */ 606 static __be32 607 nfsd_proc_statfs(struct svc_rqst *rqstp) 608 { 609 struct nfsd_fhandle *argp = rqstp->rq_argp; 610 struct nfsd_statfsres *resp = rqstp->rq_resp; 611 612 dprintk("nfsd: STATFS %s\n", SVCFH_fmt(&argp->fh)); 613 614 resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 615 NFSD_MAY_BYPASS_GSS_ON_ROOT); 616 fh_put(&argp->fh); 617 return rpc_success; 618 } 619 620 /* 621 * NFSv2 Server procedures. 622 * Only the results of non-idempotent operations are cached. 623 */ 624 625 #define ST 1 /* status */ 626 #define FH 8 /* filehandle */ 627 #define AT 18 /* attributes */ 628 629 static const struct svc_procedure nfsd_procedures2[18] = { 630 [NFSPROC_NULL] = { 631 .pc_func = nfsd_proc_null, 632 .pc_decode = nfssvc_decode_voidarg, 633 .pc_encode = nfssvc_encode_voidres, 634 .pc_argsize = sizeof(struct nfsd_voidargs), 635 .pc_ressize = sizeof(struct nfsd_voidres), 636 .pc_cachetype = RC_NOCACHE, 637 .pc_xdrressize = 0, 638 .pc_name = "NULL", 639 }, 640 [NFSPROC_GETATTR] = { 641 .pc_func = nfsd_proc_getattr, 642 .pc_decode = nfssvc_decode_fhandleargs, 643 .pc_encode = nfssvc_encode_attrstat, 644 .pc_release = nfssvc_release_attrstat, 645 .pc_argsize = sizeof(struct nfsd_fhandle), 646 .pc_ressize = sizeof(struct nfsd_attrstat), 647 .pc_cachetype = RC_NOCACHE, 648 .pc_xdrressize = ST+AT, 649 .pc_name = "GETATTR", 650 }, 651 [NFSPROC_SETATTR] = { 652 .pc_func = nfsd_proc_setattr, 653 .pc_decode = nfssvc_decode_sattrargs, 654 .pc_encode = nfssvc_encode_attrstat, 655 .pc_release = nfssvc_release_attrstat, 656 .pc_argsize = sizeof(struct nfsd_sattrargs), 657 .pc_ressize = sizeof(struct nfsd_attrstat), 658 .pc_cachetype = RC_REPLBUFF, 659 .pc_xdrressize = ST+AT, 660 .pc_name = "SETATTR", 661 }, 662 [NFSPROC_ROOT] = { 663 .pc_func = nfsd_proc_root, 664 .pc_decode = nfssvc_decode_voidarg, 665 .pc_encode = nfssvc_encode_voidres, 666 .pc_argsize = sizeof(struct nfsd_voidargs), 667 .pc_ressize = sizeof(struct nfsd_voidres), 668 .pc_cachetype = RC_NOCACHE, 669 .pc_xdrressize = 0, 670 .pc_name = "ROOT", 671 }, 672 [NFSPROC_LOOKUP] = { 673 .pc_func = nfsd_proc_lookup, 674 .pc_decode = nfssvc_decode_diropargs, 675 .pc_encode = nfssvc_encode_diropres, 676 .pc_release = nfssvc_release_diropres, 677 .pc_argsize = sizeof(struct nfsd_diropargs), 678 .pc_ressize = sizeof(struct nfsd_diropres), 679 .pc_cachetype = RC_NOCACHE, 680 .pc_xdrressize = ST+FH+AT, 681 .pc_name = "LOOKUP", 682 }, 683 [NFSPROC_READLINK] = { 684 .pc_func = nfsd_proc_readlink, 685 .pc_decode = nfssvc_decode_fhandleargs, 686 .pc_encode = nfssvc_encode_readlinkres, 687 .pc_argsize = sizeof(struct nfsd_fhandle), 688 .pc_ressize = sizeof(struct nfsd_readlinkres), 689 .pc_cachetype = RC_NOCACHE, 690 .pc_xdrressize = ST+1+NFS_MAXPATHLEN/4, 691 .pc_name = "READLINK", 692 }, 693 [NFSPROC_READ] = { 694 .pc_func = nfsd_proc_read, 695 .pc_decode = nfssvc_decode_readargs, 696 .pc_encode = nfssvc_encode_readres, 697 .pc_release = nfssvc_release_readres, 698 .pc_argsize = sizeof(struct nfsd_readargs), 699 .pc_ressize = sizeof(struct nfsd_readres), 700 .pc_cachetype = RC_NOCACHE, 701 .pc_xdrressize = ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4, 702 .pc_name = "READ", 703 }, 704 [NFSPROC_WRITECACHE] = { 705 .pc_func = nfsd_proc_writecache, 706 .pc_decode = nfssvc_decode_voidarg, 707 .pc_encode = nfssvc_encode_voidres, 708 .pc_argsize = sizeof(struct nfsd_voidargs), 709 .pc_ressize = sizeof(struct nfsd_voidres), 710 .pc_cachetype = RC_NOCACHE, 711 .pc_xdrressize = 0, 712 .pc_name = "WRITECACHE", 713 }, 714 [NFSPROC_WRITE] = { 715 .pc_func = nfsd_proc_write, 716 .pc_decode = nfssvc_decode_writeargs, 717 .pc_encode = nfssvc_encode_attrstat, 718 .pc_release = nfssvc_release_attrstat, 719 .pc_argsize = sizeof(struct nfsd_writeargs), 720 .pc_ressize = sizeof(struct nfsd_attrstat), 721 .pc_cachetype = RC_REPLBUFF, 722 .pc_xdrressize = ST+AT, 723 .pc_name = "WRITE", 724 }, 725 [NFSPROC_CREATE] = { 726 .pc_func = nfsd_proc_create, 727 .pc_decode = nfssvc_decode_createargs, 728 .pc_encode = nfssvc_encode_diropres, 729 .pc_release = nfssvc_release_diropres, 730 .pc_argsize = sizeof(struct nfsd_createargs), 731 .pc_ressize = sizeof(struct nfsd_diropres), 732 .pc_cachetype = RC_REPLBUFF, 733 .pc_xdrressize = ST+FH+AT, 734 .pc_name = "CREATE", 735 }, 736 [NFSPROC_REMOVE] = { 737 .pc_func = nfsd_proc_remove, 738 .pc_decode = nfssvc_decode_diropargs, 739 .pc_encode = nfssvc_encode_stat, 740 .pc_argsize = sizeof(struct nfsd_diropargs), 741 .pc_ressize = sizeof(struct nfsd_stat), 742 .pc_cachetype = RC_REPLSTAT, 743 .pc_xdrressize = ST, 744 .pc_name = "REMOVE", 745 }, 746 [NFSPROC_RENAME] = { 747 .pc_func = nfsd_proc_rename, 748 .pc_decode = nfssvc_decode_renameargs, 749 .pc_encode = nfssvc_encode_stat, 750 .pc_argsize = sizeof(struct nfsd_renameargs), 751 .pc_ressize = sizeof(struct nfsd_stat), 752 .pc_cachetype = RC_REPLSTAT, 753 .pc_xdrressize = ST, 754 .pc_name = "RENAME", 755 }, 756 [NFSPROC_LINK] = { 757 .pc_func = nfsd_proc_link, 758 .pc_decode = nfssvc_decode_linkargs, 759 .pc_encode = nfssvc_encode_stat, 760 .pc_argsize = sizeof(struct nfsd_linkargs), 761 .pc_ressize = sizeof(struct nfsd_stat), 762 .pc_cachetype = RC_REPLSTAT, 763 .pc_xdrressize = ST, 764 .pc_name = "LINK", 765 }, 766 [NFSPROC_SYMLINK] = { 767 .pc_func = nfsd_proc_symlink, 768 .pc_decode = nfssvc_decode_symlinkargs, 769 .pc_encode = nfssvc_encode_stat, 770 .pc_argsize = sizeof(struct nfsd_symlinkargs), 771 .pc_ressize = sizeof(struct nfsd_stat), 772 .pc_cachetype = RC_REPLSTAT, 773 .pc_xdrressize = ST, 774 .pc_name = "SYMLINK", 775 }, 776 [NFSPROC_MKDIR] = { 777 .pc_func = nfsd_proc_mkdir, 778 .pc_decode = nfssvc_decode_createargs, 779 .pc_encode = nfssvc_encode_diropres, 780 .pc_release = nfssvc_release_diropres, 781 .pc_argsize = sizeof(struct nfsd_createargs), 782 .pc_ressize = sizeof(struct nfsd_diropres), 783 .pc_cachetype = RC_REPLBUFF, 784 .pc_xdrressize = ST+FH+AT, 785 .pc_name = "MKDIR", 786 }, 787 [NFSPROC_RMDIR] = { 788 .pc_func = nfsd_proc_rmdir, 789 .pc_decode = nfssvc_decode_diropargs, 790 .pc_encode = nfssvc_encode_stat, 791 .pc_argsize = sizeof(struct nfsd_diropargs), 792 .pc_ressize = sizeof(struct nfsd_stat), 793 .pc_cachetype = RC_REPLSTAT, 794 .pc_xdrressize = ST, 795 .pc_name = "RMDIR", 796 }, 797 [NFSPROC_READDIR] = { 798 .pc_func = nfsd_proc_readdir, 799 .pc_decode = nfssvc_decode_readdirargs, 800 .pc_encode = nfssvc_encode_readdirres, 801 .pc_argsize = sizeof(struct nfsd_readdirargs), 802 .pc_ressize = sizeof(struct nfsd_readdirres), 803 .pc_cachetype = RC_NOCACHE, 804 .pc_name = "READDIR", 805 }, 806 [NFSPROC_STATFS] = { 807 .pc_func = nfsd_proc_statfs, 808 .pc_decode = nfssvc_decode_fhandleargs, 809 .pc_encode = nfssvc_encode_statfsres, 810 .pc_argsize = sizeof(struct nfsd_fhandle), 811 .pc_ressize = sizeof(struct nfsd_statfsres), 812 .pc_cachetype = RC_NOCACHE, 813 .pc_xdrressize = ST+5, 814 .pc_name = "STATFS", 815 }, 816 }; 817 818 819 static unsigned int nfsd_count2[ARRAY_SIZE(nfsd_procedures2)]; 820 const struct svc_version nfsd_version2 = { 821 .vs_vers = 2, 822 .vs_nproc = 18, 823 .vs_proc = nfsd_procedures2, 824 .vs_count = nfsd_count2, 825 .vs_dispatch = nfsd_dispatch, 826 .vs_xdrsize = NFS2_SVC_XDRSIZE, 827 }; 828 829 /* 830 * Map errnos to NFS errnos. 831 */ 832 __be32 833 nfserrno (int errno) 834 { 835 static struct { 836 __be32 nfserr; 837 int syserr; 838 } nfs_errtbl[] = { 839 { nfs_ok, 0 }, 840 { nfserr_perm, -EPERM }, 841 { nfserr_noent, -ENOENT }, 842 { nfserr_io, -EIO }, 843 { nfserr_nxio, -ENXIO }, 844 { nfserr_fbig, -E2BIG }, 845 { nfserr_acces, -EACCES }, 846 { nfserr_exist, -EEXIST }, 847 { nfserr_xdev, -EXDEV }, 848 { nfserr_mlink, -EMLINK }, 849 { nfserr_nodev, -ENODEV }, 850 { nfserr_notdir, -ENOTDIR }, 851 { nfserr_isdir, -EISDIR }, 852 { nfserr_inval, -EINVAL }, 853 { nfserr_fbig, -EFBIG }, 854 { nfserr_nospc, -ENOSPC }, 855 { nfserr_rofs, -EROFS }, 856 { nfserr_mlink, -EMLINK }, 857 { nfserr_nametoolong, -ENAMETOOLONG }, 858 { nfserr_notempty, -ENOTEMPTY }, 859 #ifdef EDQUOT 860 { nfserr_dquot, -EDQUOT }, 861 #endif 862 { nfserr_stale, -ESTALE }, 863 { nfserr_jukebox, -ETIMEDOUT }, 864 { nfserr_jukebox, -ERESTARTSYS }, 865 { nfserr_jukebox, -EAGAIN }, 866 { nfserr_jukebox, -EWOULDBLOCK }, 867 { nfserr_jukebox, -ENOMEM }, 868 { nfserr_io, -ETXTBSY }, 869 { nfserr_notsupp, -EOPNOTSUPP }, 870 { nfserr_toosmall, -ETOOSMALL }, 871 { nfserr_serverfault, -ESERVERFAULT }, 872 { nfserr_serverfault, -ENFILE }, 873 { nfserr_io, -EUCLEAN }, 874 { nfserr_perm, -ENOKEY }, 875 }; 876 int i; 877 878 for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) { 879 if (nfs_errtbl[i].syserr == errno) 880 return nfs_errtbl[i].nfserr; 881 } 882 WARN_ONCE(1, "nfsd: non-standard errno: %d\n", errno); 883 return nfserr_io; 884 } 885 886