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 #include "trace.h" 14 15 #define NFSDDBG_FACILITY NFSDDBG_PROC 16 17 static __be32 nfsd_map_status(__be32 status) 18 { 19 switch (status) { 20 case nfs_ok: 21 break; 22 case nfserr_nofilehandle: 23 case nfserr_badhandle: 24 status = nfserr_stale; 25 break; 26 case nfserr_wrongsec: 27 case nfserr_xdev: 28 case nfserr_file_open: 29 status = nfserr_acces; 30 break; 31 case nfserr_symlink_not_dir: 32 status = nfserr_notdir; 33 break; 34 case nfserr_symlink: 35 case nfserr_wrong_type: 36 status = nfserr_inval; 37 break; 38 } 39 return status; 40 } 41 42 static __be32 43 nfsd_proc_null(struct svc_rqst *rqstp) 44 { 45 return rpc_success; 46 } 47 48 /* 49 * Get a file's attributes 50 * N.B. After this call resp->fh needs an fh_put 51 */ 52 static __be32 53 nfsd_proc_getattr(struct svc_rqst *rqstp) 54 { 55 struct nfsd_fhandle *argp = rqstp->rq_argp; 56 struct nfsd_attrstat *resp = rqstp->rq_resp; 57 58 trace_nfsd_vfs_getattr(rqstp, &argp->fh); 59 60 fh_copy(&resp->fh, &argp->fh); 61 resp->status = fh_verify(rqstp, &resp->fh, 0, 62 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); 63 if (resp->status != nfs_ok) 64 goto out; 65 resp->status = fh_getattr(&resp->fh, &resp->stat); 66 out: 67 resp->status = nfsd_map_status(resp->status); 68 return rpc_success; 69 } 70 71 /* 72 * Set a file's attributes 73 * N.B. After this call resp->fh needs an fh_put 74 */ 75 static __be32 76 nfsd_proc_setattr(struct svc_rqst *rqstp) 77 { 78 struct nfsd_sattrargs *argp = rqstp->rq_argp; 79 struct nfsd_attrstat *resp = rqstp->rq_resp; 80 struct iattr *iap = &argp->attrs; 81 struct nfsd_attrs attrs = { 82 .na_iattr = iap, 83 }; 84 struct svc_fh *fhp; 85 86 dprintk("nfsd: SETATTR %s, valid=%x, size=%ld\n", 87 SVCFH_fmt(&argp->fh), 88 argp->attrs.ia_valid, (long) argp->attrs.ia_size); 89 90 fhp = fh_copy(&resp->fh, &argp->fh); 91 92 /* 93 * NFSv2 does not differentiate between "set-[ac]time-to-now" 94 * which only requires access, and "set-[ac]time-to-X" which 95 * requires ownership. 96 * So if it looks like it might be "set both to the same time which 97 * is close to now", and if setattr_prepare fails, then we 98 * convert to "set to now" instead of "set to explicit time" 99 * 100 * We only call setattr_prepare as the last test as technically 101 * it is not an interface that we should be using. 102 */ 103 #define BOTH_TIME_SET (ATTR_ATIME_SET | ATTR_MTIME_SET) 104 #define MAX_TOUCH_TIME_ERROR (30*60) 105 if ((iap->ia_valid & BOTH_TIME_SET) == BOTH_TIME_SET && 106 iap->ia_mtime.tv_sec == iap->ia_atime.tv_sec) { 107 /* 108 * Looks probable. 109 * 110 * Now just make sure time is in the right ballpark. 111 * Solaris, at least, doesn't seem to care what the time 112 * request is. We require it be within 30 minutes of now. 113 */ 114 time64_t delta = iap->ia_atime.tv_sec - ktime_get_real_seconds(); 115 116 resp->status = fh_verify(rqstp, fhp, 0, NFSD_MAY_NOP); 117 if (resp->status != nfs_ok) 118 goto out; 119 120 if (delta < 0) 121 delta = -delta; 122 if (delta < MAX_TOUCH_TIME_ERROR && 123 setattr_prepare(&nop_mnt_idmap, fhp->fh_dentry, iap) != 0) { 124 /* 125 * Turn off ATTR_[AM]TIME_SET but leave ATTR_[AM]TIME. 126 * This will cause notify_change to set these times 127 * to "now" 128 */ 129 iap->ia_valid &= ~BOTH_TIME_SET; 130 } 131 } 132 133 resp->status = nfsd_setattr(rqstp, fhp, &attrs, NULL); 134 if (resp->status != nfs_ok) 135 goto out; 136 137 resp->status = fh_getattr(&resp->fh, &resp->stat); 138 out: 139 resp->status = nfsd_map_status(resp->status); 140 return rpc_success; 141 } 142 143 /* Obsolete, replaced by MNTPROC_MNT. */ 144 static __be32 145 nfsd_proc_root(struct svc_rqst *rqstp) 146 { 147 return rpc_success; 148 } 149 150 /* 151 * Look up a path name component 152 * Note: the dentry in the resp->fh may be negative if the file 153 * doesn't exist yet. 154 * N.B. After this call resp->fh needs an fh_put 155 */ 156 static __be32 157 nfsd_proc_lookup(struct svc_rqst *rqstp) 158 { 159 struct nfsd_diropargs *argp = rqstp->rq_argp; 160 struct nfsd_diropres *resp = rqstp->rq_resp; 161 162 dprintk("nfsd: LOOKUP %s %.*s\n", 163 SVCFH_fmt(&argp->fh), argp->len, argp->name); 164 165 fh_init(&resp->fh, NFS_FHSIZE); 166 resp->status = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len, 167 &resp->fh); 168 fh_put(&argp->fh); 169 if (resp->status != nfs_ok) 170 goto out; 171 172 resp->status = fh_getattr(&resp->fh, &resp->stat); 173 out: 174 resp->status = nfsd_map_status(resp->status); 175 return rpc_success; 176 } 177 178 /* 179 * Read a symlink. 180 */ 181 static __be32 182 nfsd_proc_readlink(struct svc_rqst *rqstp) 183 { 184 struct nfsd_fhandle *argp = rqstp->rq_argp; 185 struct nfsd_readlinkres *resp = rqstp->rq_resp; 186 187 dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh)); 188 189 /* Read the symlink. */ 190 resp->len = NFS_MAXPATHLEN; 191 resp->page = *(rqstp->rq_next_page++); 192 resp->status = nfsd_readlink(rqstp, &argp->fh, 193 page_address(resp->page), &resp->len); 194 195 fh_put(&argp->fh); 196 resp->status = nfsd_map_status(resp->status); 197 return rpc_success; 198 } 199 200 /* 201 * Read a portion of a file. 202 * N.B. After this call resp->fh needs an fh_put 203 */ 204 static __be32 205 nfsd_proc_read(struct svc_rqst *rqstp) 206 { 207 struct nfsd_readargs *argp = rqstp->rq_argp; 208 struct nfsd_readres *resp = rqstp->rq_resp; 209 u32 eof; 210 211 dprintk("nfsd: READ %s %d bytes at %d\n", 212 SVCFH_fmt(&argp->fh), 213 argp->count, argp->offset); 214 215 argp->count = min_t(u32, argp->count, NFS_MAXDATA); 216 argp->count = min_t(u32, argp->count, rqstp->rq_res.buflen); 217 218 resp->pages = rqstp->rq_next_page; 219 220 /* Obtain buffer pointer for payload. 19 is 1 word for 221 * status, 17 words for fattr, and 1 word for the byte count. 222 */ 223 svc_reserve_auth(rqstp, (19<<2) + argp->count + 4); 224 225 resp->count = argp->count; 226 fh_copy(&resp->fh, &argp->fh); 227 resp->status = nfsd_read(rqstp, &resp->fh, argp->offset, 228 &resp->count, &eof); 229 if (resp->status == nfs_ok) 230 resp->status = fh_getattr(&resp->fh, &resp->stat); 231 else if (resp->status == nfserr_jukebox) 232 set_bit(RQ_DROPME, &rqstp->rq_flags); 233 resp->status = nfsd_map_status(resp->status); 234 return rpc_success; 235 } 236 237 /* Reserved */ 238 static __be32 239 nfsd_proc_writecache(struct svc_rqst *rqstp) 240 { 241 return rpc_success; 242 } 243 244 /* 245 * Write data to a file 246 * N.B. After this call resp->fh needs an fh_put 247 */ 248 static __be32 249 nfsd_proc_write(struct svc_rqst *rqstp) 250 { 251 struct nfsd_writeargs *argp = rqstp->rq_argp; 252 struct nfsd_attrstat *resp = rqstp->rq_resp; 253 unsigned long cnt = argp->len; 254 255 dprintk("nfsd: WRITE %s %u bytes at %d\n", 256 SVCFH_fmt(&argp->fh), 257 argp->len, argp->offset); 258 259 fh_copy(&resp->fh, &argp->fh); 260 resp->status = nfsd_write(rqstp, &resp->fh, argp->offset, 261 &argp->payload, &cnt, NFS_DATA_SYNC, NULL); 262 if (resp->status == nfs_ok) 263 resp->status = fh_getattr(&resp->fh, &resp->stat); 264 else if (resp->status == nfserr_jukebox) 265 set_bit(RQ_DROPME, &rqstp->rq_flags); 266 resp->status = nfsd_map_status(resp->status); 267 return rpc_success; 268 } 269 270 /* 271 * CREATE processing is complicated. The keyword here is `overloaded.' 272 * The parent directory is kept locked between the check for existence 273 * and the actual create() call in compliance with VFS protocols. 274 * N.B. After this call _both_ argp->fh and resp->fh need an fh_put 275 */ 276 static __be32 277 nfsd_proc_create(struct svc_rqst *rqstp) 278 { 279 struct nfsd_createargs *argp = rqstp->rq_argp; 280 struct nfsd_diropres *resp = rqstp->rq_resp; 281 svc_fh *dirfhp = &argp->fh; 282 svc_fh *newfhp = &resp->fh; 283 struct iattr *attr = &argp->attrs; 284 struct nfsd_attrs attrs = { 285 .na_iattr = attr, 286 }; 287 struct inode *inode; 288 struct dentry *dchild; 289 int type, mode; 290 int hosterr; 291 dev_t rdev = 0, wanted = new_decode_dev(attr->ia_size); 292 293 /* First verify the parent file handle */ 294 resp->status = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC); 295 if (resp->status != nfs_ok) 296 goto done; /* must fh_put dirfhp even on error */ 297 298 /* Check for NFSD_MAY_WRITE in nfsd_create if necessary */ 299 300 resp->status = nfserr_exist; 301 if (isdotent(argp->name, argp->len)) 302 goto done; 303 hosterr = fh_want_write(dirfhp); 304 if (hosterr) { 305 resp->status = nfserrno(hosterr); 306 goto done; 307 } 308 309 dchild = start_creating(&nop_mnt_idmap, dirfhp->fh_dentry, 310 &QSTR_LEN(argp->name, argp->len)); 311 if (IS_ERR(dchild)) { 312 resp->status = nfserrno(PTR_ERR(dchild)); 313 goto out_write; 314 } 315 fh_init(newfhp, NFS_FHSIZE); 316 resp->status = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp); 317 if (!resp->status && d_really_is_negative(dchild)) 318 resp->status = nfserr_noent; 319 if (resp->status) { 320 if (resp->status != nfserr_noent) 321 goto out_unlock; 322 /* 323 * If the new file handle wasn't verified, we can't tell 324 * whether the file exists or not. Time to bail ... 325 */ 326 resp->status = nfserr_acces; 327 if (!newfhp->fh_dentry) { 328 printk(KERN_WARNING 329 "nfsd_proc_create: file handle not verified\n"); 330 goto out_unlock; 331 } 332 } 333 334 inode = d_inode(newfhp->fh_dentry); 335 336 /* Unfudge the mode bits */ 337 if (attr->ia_valid & ATTR_MODE) { 338 type = attr->ia_mode & S_IFMT; 339 mode = attr->ia_mode & ~S_IFMT; 340 if (!type) { 341 /* no type, so if target exists, assume same as that, 342 * else assume a file */ 343 if (inode) { 344 type = inode->i_mode & S_IFMT; 345 switch(type) { 346 case S_IFCHR: 347 case S_IFBLK: 348 /* reserve rdev for later checking */ 349 rdev = inode->i_rdev; 350 attr->ia_valid |= ATTR_SIZE; 351 352 fallthrough; 353 case S_IFIFO: 354 /* this is probably a permission check.. 355 * at least IRIX implements perm checking on 356 * echo thing > device-special-file-or-pipe 357 * by doing a CREATE with type==0 358 */ 359 resp->status = nfsd_permission( 360 &rqstp->rq_cred, 361 newfhp->fh_export, 362 newfhp->fh_dentry, 363 NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS); 364 if (resp->status && resp->status != nfserr_rofs) 365 goto out_unlock; 366 } 367 } else 368 type = S_IFREG; 369 } 370 } else if (inode) { 371 type = inode->i_mode & S_IFMT; 372 mode = inode->i_mode & ~S_IFMT; 373 } else { 374 type = S_IFREG; 375 mode = 0; /* ??? */ 376 } 377 378 attr->ia_valid |= ATTR_MODE; 379 attr->ia_mode = mode; 380 381 /* Special treatment for non-regular files according to the 382 * gospel of sun micro 383 */ 384 if (type != S_IFREG) { 385 if (type != S_IFBLK && type != S_IFCHR) { 386 rdev = 0; 387 } else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) { 388 /* If you think you've seen the worst, grok this. */ 389 type = S_IFIFO; 390 } else { 391 /* Okay, char or block special */ 392 if (!rdev) 393 rdev = wanted; 394 } 395 396 /* we've used the SIZE information, so discard it */ 397 attr->ia_valid &= ~ATTR_SIZE; 398 399 /* Make sure the type and device matches */ 400 resp->status = nfserr_exist; 401 if (inode && inode_wrong_type(inode, type)) 402 goto out_unlock; 403 } 404 405 resp->status = nfs_ok; 406 if (!inode) { 407 /* File doesn't exist. Create it and set attrs */ 408 resp->status = nfsd_create_locked(rqstp, dirfhp, &attrs, type, 409 rdev, newfhp); 410 /* nfsd_create_locked() unlocked the parent */ 411 dput(dchild); 412 goto out_write; 413 } else if (type == S_IFREG) { 414 dprintk("nfsd: existing %s, valid=%x, size=%ld\n", 415 argp->name, attr->ia_valid, (long) attr->ia_size); 416 /* File already exists. We ignore all attributes except 417 * size, so that creat() behaves exactly like 418 * open(..., O_CREAT|O_TRUNC|O_WRONLY). 419 */ 420 attr->ia_valid &= ATTR_SIZE; 421 if (attr->ia_valid) 422 resp->status = nfsd_setattr(rqstp, newfhp, &attrs, 423 NULL); 424 } 425 426 out_unlock: 427 end_creating(dchild); 428 out_write: 429 fh_drop_write(dirfhp); 430 done: 431 fh_put(dirfhp); 432 if (resp->status != nfs_ok) 433 goto out; 434 resp->status = fh_getattr(&resp->fh, &resp->stat); 435 out: 436 resp->status = nfsd_map_status(resp->status); 437 return rpc_success; 438 } 439 440 static __be32 441 nfsd_proc_remove(struct svc_rqst *rqstp) 442 { 443 struct nfsd_diropargs *argp = rqstp->rq_argp; 444 struct nfsd_stat *resp = rqstp->rq_resp; 445 446 /* Unlink. -SIFDIR means file must not be a directory */ 447 resp->status = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, 448 argp->name, argp->len); 449 fh_put(&argp->fh); 450 resp->status = nfsd_map_status(resp->status); 451 return rpc_success; 452 } 453 454 static __be32 455 nfsd_proc_rename(struct svc_rqst *rqstp) 456 { 457 struct nfsd_renameargs *argp = rqstp->rq_argp; 458 struct nfsd_stat *resp = rqstp->rq_resp; 459 460 resp->status = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen, 461 &argp->tfh, argp->tname, argp->tlen); 462 fh_put(&argp->ffh); 463 fh_put(&argp->tfh); 464 resp->status = nfsd_map_status(resp->status); 465 return rpc_success; 466 } 467 468 static __be32 469 nfsd_proc_link(struct svc_rqst *rqstp) 470 { 471 struct nfsd_linkargs *argp = rqstp->rq_argp; 472 struct nfsd_stat *resp = rqstp->rq_resp; 473 474 resp->status = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen, 475 &argp->ffh); 476 fh_put(&argp->ffh); 477 fh_put(&argp->tfh); 478 resp->status = nfsd_map_status(resp->status); 479 return rpc_success; 480 } 481 482 static __be32 483 nfsd_proc_symlink(struct svc_rqst *rqstp) 484 { 485 struct nfsd_symlinkargs *argp = rqstp->rq_argp; 486 struct nfsd_stat *resp = rqstp->rq_resp; 487 struct nfsd_attrs attrs = { 488 .na_iattr = &argp->attrs, 489 }; 490 struct svc_fh newfh; 491 492 if (argp->tlen > NFS_MAXPATHLEN) { 493 resp->status = nfserr_nametoolong; 494 goto out; 495 } 496 497 argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first, 498 page_address(rqstp->rq_arg.pages[0]), 499 argp->tlen); 500 if (IS_ERR(argp->tname)) { 501 resp->status = nfserrno(PTR_ERR(argp->tname)); 502 goto out; 503 } 504 505 fh_init(&newfh, NFS_FHSIZE); 506 resp->status = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen, 507 argp->tname, &attrs, &newfh); 508 509 kfree(argp->tname); 510 fh_put(&argp->ffh); 511 fh_put(&newfh); 512 out: 513 resp->status = nfsd_map_status(resp->status); 514 return rpc_success; 515 } 516 517 /* 518 * Make directory. This operation is not idempotent. 519 * N.B. After this call resp->fh needs an fh_put 520 */ 521 static __be32 522 nfsd_proc_mkdir(struct svc_rqst *rqstp) 523 { 524 struct nfsd_createargs *argp = rqstp->rq_argp; 525 struct nfsd_diropres *resp = rqstp->rq_resp; 526 struct nfsd_attrs attrs = { 527 .na_iattr = &argp->attrs, 528 }; 529 530 if (resp->fh.fh_dentry) { 531 printk(KERN_WARNING 532 "nfsd_proc_mkdir: response already verified??\n"); 533 } 534 535 argp->attrs.ia_valid &= ~ATTR_SIZE; 536 fh_init(&resp->fh, NFS_FHSIZE); 537 resp->status = nfsd_create(rqstp, &argp->fh, argp->name, argp->len, 538 &attrs, S_IFDIR, 0, &resp->fh); 539 fh_put(&argp->fh); 540 if (resp->status != nfs_ok) 541 goto out; 542 543 resp->status = fh_getattr(&resp->fh, &resp->stat); 544 out: 545 resp->status = nfsd_map_status(resp->status); 546 return rpc_success; 547 } 548 549 /* 550 * Remove a directory 551 */ 552 static __be32 553 nfsd_proc_rmdir(struct svc_rqst *rqstp) 554 { 555 struct nfsd_diropargs *argp = rqstp->rq_argp; 556 struct nfsd_stat *resp = rqstp->rq_resp; 557 558 resp->status = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, 559 argp->name, argp->len); 560 fh_put(&argp->fh); 561 resp->status = nfsd_map_status(resp->status); 562 return rpc_success; 563 } 564 565 static void nfsd_init_dirlist_pages(struct svc_rqst *rqstp, 566 struct nfsd_readdirres *resp, 567 u32 count) 568 { 569 struct xdr_buf *buf = &resp->dirlist; 570 struct xdr_stream *xdr = &resp->xdr; 571 572 memset(buf, 0, sizeof(*buf)); 573 574 /* Reserve room for the NULL ptr & eof flag (-2 words) */ 575 buf->buflen = clamp(count, (u32)(XDR_UNIT * 2), (u32)PAGE_SIZE); 576 buf->buflen -= XDR_UNIT * 2; 577 buf->pages = rqstp->rq_next_page; 578 rqstp->rq_next_page++; 579 580 xdr_init_encode_pages(xdr, buf); 581 } 582 583 /* 584 * Read a portion of a directory. 585 */ 586 static __be32 587 nfsd_proc_readdir(struct svc_rqst *rqstp) 588 { 589 struct nfsd_readdirargs *argp = rqstp->rq_argp; 590 struct nfsd_readdirres *resp = rqstp->rq_resp; 591 loff_t offset; 592 593 trace_nfsd_vfs_readdir(rqstp, &argp->fh, 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 resp->status = nfsd_map_status(resp->status); 606 return rpc_success; 607 } 608 609 /* 610 * Get file system info 611 */ 612 static __be32 613 nfsd_proc_statfs(struct svc_rqst *rqstp) 614 { 615 struct nfsd_fhandle *argp = rqstp->rq_argp; 616 struct nfsd_statfsres *resp = rqstp->rq_resp; 617 618 resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 619 NFSD_MAY_BYPASS_GSS_ON_ROOT); 620 fh_put(&argp->fh); 621 resp->status = nfsd_map_status(resp->status); 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+NFS_MAXDATA/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