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; 154 155 dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh)); 156 157 /* Read the symlink. */ 158 resp->len = NFS_MAXPATHLEN; 159 resp->page = *(rqstp->rq_next_page++); 160 resp->status = nfsd_readlink(rqstp, &argp->fh, 161 page_address(resp->page), &resp->len); 162 163 fh_put(&argp->fh); 164 return rpc_success; 165 } 166 167 /* 168 * Read a portion of a file. 169 * N.B. After this call resp->fh needs an fh_put 170 */ 171 static __be32 172 nfsd_proc_read(struct svc_rqst *rqstp) 173 { 174 struct nfsd_readargs *argp = rqstp->rq_argp; 175 struct nfsd_readres *resp = rqstp->rq_resp; 176 unsigned int len; 177 u32 eof; 178 int v; 179 180 dprintk("nfsd: READ %s %d bytes at %d\n", 181 SVCFH_fmt(&argp->fh), 182 argp->count, argp->offset); 183 184 argp->count = min_t(u32, argp->count, NFSSVC_MAXBLKSIZE_V2); 185 186 v = 0; 187 len = argp->count; 188 resp->pages = rqstp->rq_next_page; 189 while (len > 0) { 190 struct page *page = *(rqstp->rq_next_page++); 191 192 rqstp->rq_vec[v].iov_base = page_address(page); 193 rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE); 194 len -= rqstp->rq_vec[v].iov_len; 195 v++; 196 } 197 198 /* Obtain buffer pointer for payload. 19 is 1 word for 199 * status, 17 words for fattr, and 1 word for the byte count. 200 */ 201 svc_reserve_auth(rqstp, (19<<2) + argp->count + 4); 202 203 resp->count = argp->count; 204 fh_copy(&resp->fh, &argp->fh); 205 resp->status = nfsd_read(rqstp, &resp->fh, argp->offset, 206 rqstp->rq_vec, v, &resp->count, &eof); 207 if (resp->status == nfs_ok) 208 resp->status = fh_getattr(&resp->fh, &resp->stat); 209 else if (resp->status == nfserr_jukebox) 210 return rpc_drop_reply; 211 return rpc_success; 212 } 213 214 /* Reserved */ 215 static __be32 216 nfsd_proc_writecache(struct svc_rqst *rqstp) 217 { 218 return rpc_success; 219 } 220 221 /* 222 * Write data to a file 223 * N.B. After this call resp->fh needs an fh_put 224 */ 225 static __be32 226 nfsd_proc_write(struct svc_rqst *rqstp) 227 { 228 struct nfsd_writeargs *argp = rqstp->rq_argp; 229 struct nfsd_attrstat *resp = rqstp->rq_resp; 230 unsigned long cnt = argp->len; 231 unsigned int nvecs; 232 233 dprintk("nfsd: WRITE %s %d bytes at %d\n", 234 SVCFH_fmt(&argp->fh), 235 argp->len, argp->offset); 236 237 nvecs = svc_fill_write_vector(rqstp, rqstp->rq_arg.pages, 238 &argp->first, cnt); 239 if (!nvecs) { 240 resp->status = nfserr_io; 241 goto out; 242 } 243 244 resp->status = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), 245 argp->offset, rqstp->rq_vec, nvecs, 246 &cnt, NFS_DATA_SYNC, NULL); 247 if (resp->status == nfs_ok) 248 resp->status = fh_getattr(&resp->fh, &resp->stat); 249 else if (resp->status == nfserr_jukebox) 250 return rpc_drop_reply; 251 out: 252 return rpc_success; 253 } 254 255 /* 256 * CREATE processing is complicated. The keyword here is `overloaded.' 257 * The parent directory is kept locked between the check for existence 258 * and the actual create() call in compliance with VFS protocols. 259 * N.B. After this call _both_ argp->fh and resp->fh need an fh_put 260 */ 261 static __be32 262 nfsd_proc_create(struct svc_rqst *rqstp) 263 { 264 struct nfsd_createargs *argp = rqstp->rq_argp; 265 struct nfsd_diropres *resp = rqstp->rq_resp; 266 svc_fh *dirfhp = &argp->fh; 267 svc_fh *newfhp = &resp->fh; 268 struct iattr *attr = &argp->attrs; 269 struct inode *inode; 270 struct dentry *dchild; 271 int type, mode; 272 int hosterr; 273 dev_t rdev = 0, wanted = new_decode_dev(attr->ia_size); 274 275 dprintk("nfsd: CREATE %s %.*s\n", 276 SVCFH_fmt(dirfhp), argp->len, argp->name); 277 278 /* First verify the parent file handle */ 279 resp->status = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC); 280 if (resp->status != nfs_ok) 281 goto done; /* must fh_put dirfhp even on error */ 282 283 /* Check for NFSD_MAY_WRITE in nfsd_create if necessary */ 284 285 resp->status = nfserr_exist; 286 if (isdotent(argp->name, argp->len)) 287 goto done; 288 hosterr = fh_want_write(dirfhp); 289 if (hosterr) { 290 resp->status = nfserrno(hosterr); 291 goto done; 292 } 293 294 fh_lock_nested(dirfhp, I_MUTEX_PARENT); 295 dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len); 296 if (IS_ERR(dchild)) { 297 resp->status = nfserrno(PTR_ERR(dchild)); 298 goto out_unlock; 299 } 300 fh_init(newfhp, NFS_FHSIZE); 301 resp->status = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp); 302 if (!resp->status && d_really_is_negative(dchild)) 303 resp->status = nfserr_noent; 304 dput(dchild); 305 if (resp->status) { 306 if (resp->status != nfserr_noent) 307 goto out_unlock; 308 /* 309 * If the new file handle wasn't verified, we can't tell 310 * whether the file exists or not. Time to bail ... 311 */ 312 resp->status = nfserr_acces; 313 if (!newfhp->fh_dentry) { 314 printk(KERN_WARNING 315 "nfsd_proc_create: file handle not verified\n"); 316 goto out_unlock; 317 } 318 } 319 320 inode = d_inode(newfhp->fh_dentry); 321 322 /* Unfudge the mode bits */ 323 if (attr->ia_valid & ATTR_MODE) { 324 type = attr->ia_mode & S_IFMT; 325 mode = attr->ia_mode & ~S_IFMT; 326 if (!type) { 327 /* no type, so if target exists, assume same as that, 328 * else assume a file */ 329 if (inode) { 330 type = inode->i_mode & S_IFMT; 331 switch(type) { 332 case S_IFCHR: 333 case S_IFBLK: 334 /* reserve rdev for later checking */ 335 rdev = inode->i_rdev; 336 attr->ia_valid |= ATTR_SIZE; 337 338 fallthrough; 339 case S_IFIFO: 340 /* this is probably a permission check.. 341 * at least IRIX implements perm checking on 342 * echo thing > device-special-file-or-pipe 343 * by doing a CREATE with type==0 344 */ 345 resp->status = nfsd_permission(rqstp, 346 newfhp->fh_export, 347 newfhp->fh_dentry, 348 NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS); 349 if (resp->status && resp->status != nfserr_rofs) 350 goto out_unlock; 351 } 352 } else 353 type = S_IFREG; 354 } 355 } else if (inode) { 356 type = inode->i_mode & S_IFMT; 357 mode = inode->i_mode & ~S_IFMT; 358 } else { 359 type = S_IFREG; 360 mode = 0; /* ??? */ 361 } 362 363 attr->ia_valid |= ATTR_MODE; 364 attr->ia_mode = mode; 365 366 /* Special treatment for non-regular files according to the 367 * gospel of sun micro 368 */ 369 if (type != S_IFREG) { 370 if (type != S_IFBLK && type != S_IFCHR) { 371 rdev = 0; 372 } else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) { 373 /* If you think you've seen the worst, grok this. */ 374 type = S_IFIFO; 375 } else { 376 /* Okay, char or block special */ 377 if (!rdev) 378 rdev = wanted; 379 } 380 381 /* we've used the SIZE information, so discard it */ 382 attr->ia_valid &= ~ATTR_SIZE; 383 384 /* Make sure the type and device matches */ 385 resp->status = nfserr_exist; 386 if (inode && inode_wrong_type(inode, type)) 387 goto out_unlock; 388 } 389 390 resp->status = nfs_ok; 391 if (!inode) { 392 /* File doesn't exist. Create it and set attrs */ 393 resp->status = nfsd_create_locked(rqstp, dirfhp, argp->name, 394 argp->len, attr, type, rdev, 395 newfhp); 396 } else if (type == S_IFREG) { 397 dprintk("nfsd: existing %s, valid=%x, size=%ld\n", 398 argp->name, attr->ia_valid, (long) attr->ia_size); 399 /* File already exists. We ignore all attributes except 400 * size, so that creat() behaves exactly like 401 * open(..., O_CREAT|O_TRUNC|O_WRONLY). 402 */ 403 attr->ia_valid &= ATTR_SIZE; 404 if (attr->ia_valid) 405 resp->status = nfsd_setattr(rqstp, newfhp, attr, 0, 406 (time64_t)0); 407 } 408 409 out_unlock: 410 /* We don't really need to unlock, as fh_put does it. */ 411 fh_unlock(dirfhp); 412 fh_drop_write(dirfhp); 413 done: 414 fh_put(dirfhp); 415 if (resp->status != nfs_ok) 416 goto out; 417 resp->status = fh_getattr(&resp->fh, &resp->stat); 418 out: 419 return rpc_success; 420 } 421 422 static __be32 423 nfsd_proc_remove(struct svc_rqst *rqstp) 424 { 425 struct nfsd_diropargs *argp = rqstp->rq_argp; 426 struct nfsd_stat *resp = rqstp->rq_resp; 427 428 dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh), 429 argp->len, argp->name); 430 431 /* Unlink. -SIFDIR means file must not be a directory */ 432 resp->status = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, 433 argp->name, argp->len); 434 fh_put(&argp->fh); 435 return rpc_success; 436 } 437 438 static __be32 439 nfsd_proc_rename(struct svc_rqst *rqstp) 440 { 441 struct nfsd_renameargs *argp = rqstp->rq_argp; 442 struct nfsd_stat *resp = rqstp->rq_resp; 443 444 dprintk("nfsd: RENAME %s %.*s -> \n", 445 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname); 446 dprintk("nfsd: -> %s %.*s\n", 447 SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname); 448 449 resp->status = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen, 450 &argp->tfh, argp->tname, argp->tlen); 451 fh_put(&argp->ffh); 452 fh_put(&argp->tfh); 453 return rpc_success; 454 } 455 456 static __be32 457 nfsd_proc_link(struct svc_rqst *rqstp) 458 { 459 struct nfsd_linkargs *argp = rqstp->rq_argp; 460 struct nfsd_stat *resp = rqstp->rq_resp; 461 462 dprintk("nfsd: LINK %s ->\n", 463 SVCFH_fmt(&argp->ffh)); 464 dprintk("nfsd: %s %.*s\n", 465 SVCFH_fmt(&argp->tfh), 466 argp->tlen, 467 argp->tname); 468 469 resp->status = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen, 470 &argp->ffh); 471 fh_put(&argp->ffh); 472 fh_put(&argp->tfh); 473 return rpc_success; 474 } 475 476 static __be32 477 nfsd_proc_symlink(struct svc_rqst *rqstp) 478 { 479 struct nfsd_symlinkargs *argp = rqstp->rq_argp; 480 struct nfsd_stat *resp = rqstp->rq_resp; 481 struct svc_fh newfh; 482 483 if (argp->tlen > NFS_MAXPATHLEN) { 484 resp->status = nfserr_nametoolong; 485 goto out; 486 } 487 488 argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first, 489 page_address(rqstp->rq_arg.pages[0]), 490 argp->tlen); 491 if (IS_ERR(argp->tname)) { 492 resp->status = nfserrno(PTR_ERR(argp->tname)); 493 goto out; 494 } 495 496 dprintk("nfsd: SYMLINK %s %.*s -> %.*s\n", 497 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname, 498 argp->tlen, argp->tname); 499 500 fh_init(&newfh, NFS_FHSIZE); 501 resp->status = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen, 502 argp->tname, &newfh); 503 504 kfree(argp->tname); 505 fh_put(&argp->ffh); 506 fh_put(&newfh); 507 out: 508 return rpc_success; 509 } 510 511 /* 512 * Make directory. This operation is not idempotent. 513 * N.B. After this call resp->fh needs an fh_put 514 */ 515 static __be32 516 nfsd_proc_mkdir(struct svc_rqst *rqstp) 517 { 518 struct nfsd_createargs *argp = rqstp->rq_argp; 519 struct nfsd_diropres *resp = rqstp->rq_resp; 520 521 dprintk("nfsd: MKDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name); 522 523 if (resp->fh.fh_dentry) { 524 printk(KERN_WARNING 525 "nfsd_proc_mkdir: response already verified??\n"); 526 } 527 528 argp->attrs.ia_valid &= ~ATTR_SIZE; 529 fh_init(&resp->fh, NFS_FHSIZE); 530 resp->status = nfsd_create(rqstp, &argp->fh, argp->name, argp->len, 531 &argp->attrs, S_IFDIR, 0, &resp->fh); 532 fh_put(&argp->fh); 533 if (resp->status != nfs_ok) 534 goto out; 535 536 resp->status = fh_getattr(&resp->fh, &resp->stat); 537 out: 538 return rpc_success; 539 } 540 541 /* 542 * Remove a directory 543 */ 544 static __be32 545 nfsd_proc_rmdir(struct svc_rqst *rqstp) 546 { 547 struct nfsd_diropargs *argp = rqstp->rq_argp; 548 struct nfsd_stat *resp = rqstp->rq_resp; 549 550 dprintk("nfsd: RMDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name); 551 552 resp->status = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, 553 argp->name, argp->len); 554 fh_put(&argp->fh); 555 return rpc_success; 556 } 557 558 static void nfsd_init_dirlist_pages(struct svc_rqst *rqstp, 559 struct nfsd_readdirres *resp, 560 int count) 561 { 562 struct xdr_buf *buf = &resp->dirlist; 563 struct xdr_stream *xdr = &resp->xdr; 564 565 count = min_t(u32, count, PAGE_SIZE); 566 567 memset(buf, 0, sizeof(*buf)); 568 569 /* Reserve room for the NULL ptr & eof flag (-2 words) */ 570 buf->buflen = count - sizeof(__be32) * 2; 571 buf->pages = rqstp->rq_next_page; 572 rqstp->rq_next_page++; 573 574 /* This is xdr_init_encode(), but it assumes that 575 * the head kvec has already been consumed. */ 576 xdr_set_scratch_buffer(xdr, NULL, 0); 577 xdr->buf = buf; 578 xdr->page_ptr = buf->pages; 579 xdr->iov = NULL; 580 xdr->p = page_address(*buf->pages); 581 xdr->end = xdr->p + (PAGE_SIZE >> 2); 582 xdr->rqst = NULL; 583 } 584 585 /* 586 * Read a portion of a directory. 587 */ 588 static __be32 589 nfsd_proc_readdir(struct svc_rqst *rqstp) 590 { 591 struct nfsd_readdirargs *argp = rqstp->rq_argp; 592 struct nfsd_readdirres *resp = rqstp->rq_resp; 593 loff_t offset; 594 595 dprintk("nfsd: READDIR %s %d bytes at %d\n", 596 SVCFH_fmt(&argp->fh), 597 argp->count, argp->cookie); 598 599 nfsd_init_dirlist_pages(rqstp, resp, argp->count); 600 601 resp->common.err = nfs_ok; 602 resp->cookie_offset = 0; 603 offset = argp->cookie; 604 resp->status = nfsd_readdir(rqstp, &argp->fh, &offset, 605 &resp->common, nfssvc_encode_entry); 606 nfssvc_encode_nfscookie(resp, offset); 607 608 fh_put(&argp->fh); 609 return rpc_success; 610 } 611 612 /* 613 * Get file system info 614 */ 615 static __be32 616 nfsd_proc_statfs(struct svc_rqst *rqstp) 617 { 618 struct nfsd_fhandle *argp = rqstp->rq_argp; 619 struct nfsd_statfsres *resp = rqstp->rq_resp; 620 621 dprintk("nfsd: STATFS %s\n", SVCFH_fmt(&argp->fh)); 622 623 resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 624 NFSD_MAY_BYPASS_GSS_ON_ROOT); 625 fh_put(&argp->fh); 626 return rpc_success; 627 } 628 629 /* 630 * NFSv2 Server procedures. 631 * Only the results of non-idempotent operations are cached. 632 */ 633 634 #define ST 1 /* status */ 635 #define FH 8 /* filehandle */ 636 #define AT 18 /* attributes */ 637 638 static const struct svc_procedure nfsd_procedures2[18] = { 639 [NFSPROC_NULL] = { 640 .pc_func = nfsd_proc_null, 641 .pc_decode = nfssvc_decode_voidarg, 642 .pc_encode = nfssvc_encode_voidres, 643 .pc_argsize = sizeof(struct nfsd_voidargs), 644 .pc_ressize = sizeof(struct nfsd_voidres), 645 .pc_cachetype = RC_NOCACHE, 646 .pc_xdrressize = 0, 647 .pc_name = "NULL", 648 }, 649 [NFSPROC_GETATTR] = { 650 .pc_func = nfsd_proc_getattr, 651 .pc_decode = nfssvc_decode_fhandleargs, 652 .pc_encode = nfssvc_encode_attrstatres, 653 .pc_release = nfssvc_release_attrstat, 654 .pc_argsize = sizeof(struct nfsd_fhandle), 655 .pc_ressize = sizeof(struct nfsd_attrstat), 656 .pc_cachetype = RC_NOCACHE, 657 .pc_xdrressize = ST+AT, 658 .pc_name = "GETATTR", 659 }, 660 [NFSPROC_SETATTR] = { 661 .pc_func = nfsd_proc_setattr, 662 .pc_decode = nfssvc_decode_sattrargs, 663 .pc_encode = nfssvc_encode_attrstatres, 664 .pc_release = nfssvc_release_attrstat, 665 .pc_argsize = sizeof(struct nfsd_sattrargs), 666 .pc_ressize = sizeof(struct nfsd_attrstat), 667 .pc_cachetype = RC_REPLBUFF, 668 .pc_xdrressize = ST+AT, 669 .pc_name = "SETATTR", 670 }, 671 [NFSPROC_ROOT] = { 672 .pc_func = nfsd_proc_root, 673 .pc_decode = nfssvc_decode_voidarg, 674 .pc_encode = nfssvc_encode_voidres, 675 .pc_argsize = sizeof(struct nfsd_voidargs), 676 .pc_ressize = sizeof(struct nfsd_voidres), 677 .pc_cachetype = RC_NOCACHE, 678 .pc_xdrressize = 0, 679 .pc_name = "ROOT", 680 }, 681 [NFSPROC_LOOKUP] = { 682 .pc_func = nfsd_proc_lookup, 683 .pc_decode = nfssvc_decode_diropargs, 684 .pc_encode = nfssvc_encode_diropres, 685 .pc_release = nfssvc_release_diropres, 686 .pc_argsize = sizeof(struct nfsd_diropargs), 687 .pc_ressize = sizeof(struct nfsd_diropres), 688 .pc_cachetype = RC_NOCACHE, 689 .pc_xdrressize = ST+FH+AT, 690 .pc_name = "LOOKUP", 691 }, 692 [NFSPROC_READLINK] = { 693 .pc_func = nfsd_proc_readlink, 694 .pc_decode = nfssvc_decode_fhandleargs, 695 .pc_encode = nfssvc_encode_readlinkres, 696 .pc_argsize = sizeof(struct nfsd_fhandle), 697 .pc_ressize = sizeof(struct nfsd_readlinkres), 698 .pc_cachetype = RC_NOCACHE, 699 .pc_xdrressize = ST+1+NFS_MAXPATHLEN/4, 700 .pc_name = "READLINK", 701 }, 702 [NFSPROC_READ] = { 703 .pc_func = nfsd_proc_read, 704 .pc_decode = nfssvc_decode_readargs, 705 .pc_encode = nfssvc_encode_readres, 706 .pc_release = nfssvc_release_readres, 707 .pc_argsize = sizeof(struct nfsd_readargs), 708 .pc_ressize = sizeof(struct nfsd_readres), 709 .pc_cachetype = RC_NOCACHE, 710 .pc_xdrressize = ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4, 711 .pc_name = "READ", 712 }, 713 [NFSPROC_WRITECACHE] = { 714 .pc_func = nfsd_proc_writecache, 715 .pc_decode = nfssvc_decode_voidarg, 716 .pc_encode = nfssvc_encode_voidres, 717 .pc_argsize = sizeof(struct nfsd_voidargs), 718 .pc_ressize = sizeof(struct nfsd_voidres), 719 .pc_cachetype = RC_NOCACHE, 720 .pc_xdrressize = 0, 721 .pc_name = "WRITECACHE", 722 }, 723 [NFSPROC_WRITE] = { 724 .pc_func = nfsd_proc_write, 725 .pc_decode = nfssvc_decode_writeargs, 726 .pc_encode = nfssvc_encode_attrstatres, 727 .pc_release = nfssvc_release_attrstat, 728 .pc_argsize = sizeof(struct nfsd_writeargs), 729 .pc_ressize = sizeof(struct nfsd_attrstat), 730 .pc_cachetype = RC_REPLBUFF, 731 .pc_xdrressize = ST+AT, 732 .pc_name = "WRITE", 733 }, 734 [NFSPROC_CREATE] = { 735 .pc_func = nfsd_proc_create, 736 .pc_decode = nfssvc_decode_createargs, 737 .pc_encode = nfssvc_encode_diropres, 738 .pc_release = nfssvc_release_diropres, 739 .pc_argsize = sizeof(struct nfsd_createargs), 740 .pc_ressize = sizeof(struct nfsd_diropres), 741 .pc_cachetype = RC_REPLBUFF, 742 .pc_xdrressize = ST+FH+AT, 743 .pc_name = "CREATE", 744 }, 745 [NFSPROC_REMOVE] = { 746 .pc_func = nfsd_proc_remove, 747 .pc_decode = nfssvc_decode_diropargs, 748 .pc_encode = nfssvc_encode_statres, 749 .pc_argsize = sizeof(struct nfsd_diropargs), 750 .pc_ressize = sizeof(struct nfsd_stat), 751 .pc_cachetype = RC_REPLSTAT, 752 .pc_xdrressize = ST, 753 .pc_name = "REMOVE", 754 }, 755 [NFSPROC_RENAME] = { 756 .pc_func = nfsd_proc_rename, 757 .pc_decode = nfssvc_decode_renameargs, 758 .pc_encode = nfssvc_encode_statres, 759 .pc_argsize = sizeof(struct nfsd_renameargs), 760 .pc_ressize = sizeof(struct nfsd_stat), 761 .pc_cachetype = RC_REPLSTAT, 762 .pc_xdrressize = ST, 763 .pc_name = "RENAME", 764 }, 765 [NFSPROC_LINK] = { 766 .pc_func = nfsd_proc_link, 767 .pc_decode = nfssvc_decode_linkargs, 768 .pc_encode = nfssvc_encode_statres, 769 .pc_argsize = sizeof(struct nfsd_linkargs), 770 .pc_ressize = sizeof(struct nfsd_stat), 771 .pc_cachetype = RC_REPLSTAT, 772 .pc_xdrressize = ST, 773 .pc_name = "LINK", 774 }, 775 [NFSPROC_SYMLINK] = { 776 .pc_func = nfsd_proc_symlink, 777 .pc_decode = nfssvc_decode_symlinkargs, 778 .pc_encode = nfssvc_encode_statres, 779 .pc_argsize = sizeof(struct nfsd_symlinkargs), 780 .pc_ressize = sizeof(struct nfsd_stat), 781 .pc_cachetype = RC_REPLSTAT, 782 .pc_xdrressize = ST, 783 .pc_name = "SYMLINK", 784 }, 785 [NFSPROC_MKDIR] = { 786 .pc_func = nfsd_proc_mkdir, 787 .pc_decode = nfssvc_decode_createargs, 788 .pc_encode = nfssvc_encode_diropres, 789 .pc_release = nfssvc_release_diropres, 790 .pc_argsize = sizeof(struct nfsd_createargs), 791 .pc_ressize = sizeof(struct nfsd_diropres), 792 .pc_cachetype = RC_REPLBUFF, 793 .pc_xdrressize = ST+FH+AT, 794 .pc_name = "MKDIR", 795 }, 796 [NFSPROC_RMDIR] = { 797 .pc_func = nfsd_proc_rmdir, 798 .pc_decode = nfssvc_decode_diropargs, 799 .pc_encode = nfssvc_encode_statres, 800 .pc_argsize = sizeof(struct nfsd_diropargs), 801 .pc_ressize = sizeof(struct nfsd_stat), 802 .pc_cachetype = RC_REPLSTAT, 803 .pc_xdrressize = ST, 804 .pc_name = "RMDIR", 805 }, 806 [NFSPROC_READDIR] = { 807 .pc_func = nfsd_proc_readdir, 808 .pc_decode = nfssvc_decode_readdirargs, 809 .pc_encode = nfssvc_encode_readdirres, 810 .pc_argsize = sizeof(struct nfsd_readdirargs), 811 .pc_ressize = sizeof(struct nfsd_readdirres), 812 .pc_cachetype = RC_NOCACHE, 813 .pc_name = "READDIR", 814 }, 815 [NFSPROC_STATFS] = { 816 .pc_func = nfsd_proc_statfs, 817 .pc_decode = nfssvc_decode_fhandleargs, 818 .pc_encode = nfssvc_encode_statfsres, 819 .pc_argsize = sizeof(struct nfsd_fhandle), 820 .pc_ressize = sizeof(struct nfsd_statfsres), 821 .pc_cachetype = RC_NOCACHE, 822 .pc_xdrressize = ST+5, 823 .pc_name = "STATFS", 824 }, 825 }; 826 827 828 static unsigned int nfsd_count2[ARRAY_SIZE(nfsd_procedures2)]; 829 const struct svc_version nfsd_version2 = { 830 .vs_vers = 2, 831 .vs_nproc = 18, 832 .vs_proc = nfsd_procedures2, 833 .vs_count = nfsd_count2, 834 .vs_dispatch = nfsd_dispatch, 835 .vs_xdrsize = NFS2_SVC_XDRSIZE, 836 }; 837 838 /* 839 * Map errnos to NFS errnos. 840 */ 841 __be32 842 nfserrno (int errno) 843 { 844 static struct { 845 __be32 nfserr; 846 int syserr; 847 } nfs_errtbl[] = { 848 { nfs_ok, 0 }, 849 { nfserr_perm, -EPERM }, 850 { nfserr_noent, -ENOENT }, 851 { nfserr_io, -EIO }, 852 { nfserr_nxio, -ENXIO }, 853 { nfserr_fbig, -E2BIG }, 854 { nfserr_acces, -EACCES }, 855 { nfserr_exist, -EEXIST }, 856 { nfserr_xdev, -EXDEV }, 857 { nfserr_mlink, -EMLINK }, 858 { nfserr_nodev, -ENODEV }, 859 { nfserr_notdir, -ENOTDIR }, 860 { nfserr_isdir, -EISDIR }, 861 { nfserr_inval, -EINVAL }, 862 { nfserr_fbig, -EFBIG }, 863 { nfserr_nospc, -ENOSPC }, 864 { nfserr_rofs, -EROFS }, 865 { nfserr_mlink, -EMLINK }, 866 { nfserr_nametoolong, -ENAMETOOLONG }, 867 { nfserr_notempty, -ENOTEMPTY }, 868 #ifdef EDQUOT 869 { nfserr_dquot, -EDQUOT }, 870 #endif 871 { nfserr_stale, -ESTALE }, 872 { nfserr_jukebox, -ETIMEDOUT }, 873 { nfserr_jukebox, -ERESTARTSYS }, 874 { nfserr_jukebox, -EAGAIN }, 875 { nfserr_jukebox, -EWOULDBLOCK }, 876 { nfserr_jukebox, -ENOMEM }, 877 { nfserr_io, -ETXTBSY }, 878 { nfserr_notsupp, -EOPNOTSUPP }, 879 { nfserr_toosmall, -ETOOSMALL }, 880 { nfserr_serverfault, -ESERVERFAULT }, 881 { nfserr_serverfault, -ENFILE }, 882 { nfserr_io, -EUCLEAN }, 883 { nfserr_perm, -ENOKEY }, 884 { nfserr_no_grace, -ENOGRACE}, 885 }; 886 int i; 887 888 for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) { 889 if (nfs_errtbl[i].syserr == errno) 890 return nfs_errtbl[i].nfserr; 891 } 892 WARN_ONCE(1, "nfsd: non-standard errno: %d\n", errno); 893 return nfserr_io; 894 } 895 896