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