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