1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Process version 3 NFS requests. 4 * 5 * Copyright (C) 1996, 1997, 1998 Olaf Kirch <okir@monad.swb.de> 6 */ 7 8 #include <linux/fs.h> 9 #include <linux/ext2_fs.h> 10 #include <linux/magic.h> 11 #include <linux/namei.h> 12 13 #include "cache.h" 14 #include "xdr3.h" 15 #include "vfs.h" 16 #include "filecache.h" 17 #include "trace.h" 18 19 #define NFSDDBG_FACILITY NFSDDBG_PROC 20 21 static int nfs3_ftypes[] = { 22 0, /* NF3NON */ 23 S_IFREG, /* NF3REG */ 24 S_IFDIR, /* NF3DIR */ 25 S_IFBLK, /* NF3BLK */ 26 S_IFCHR, /* NF3CHR */ 27 S_IFLNK, /* NF3LNK */ 28 S_IFSOCK, /* NF3SOCK */ 29 S_IFIFO, /* NF3FIFO */ 30 }; 31 32 static __be32 nfsd3_map_status(__be32 status) 33 { 34 switch (status) { 35 case nfs_ok: 36 break; 37 case nfserr_nofilehandle: 38 status = nfserr_badhandle; 39 break; 40 case nfserr_wrongsec: 41 case nfserr_file_open: 42 status = nfserr_acces; 43 break; 44 case nfserr_symlink_not_dir: 45 status = nfserr_notdir; 46 break; 47 case nfserr_symlink: 48 case nfserr_wrong_type: 49 status = nfserr_inval; 50 break; 51 } 52 return status; 53 } 54 55 /* 56 * NULL call. 57 */ 58 static __be32 59 nfsd3_proc_null(struct svc_rqst *rqstp) 60 { 61 return rpc_success; 62 } 63 64 /* 65 * Get a file's attributes 66 */ 67 static __be32 68 nfsd3_proc_getattr(struct svc_rqst *rqstp) 69 { 70 struct nfsd_fhandle *argp = rqstp->rq_argp; 71 struct nfsd3_attrstat *resp = rqstp->rq_resp; 72 73 trace_nfsd_vfs_getattr(rqstp, &argp->fh); 74 75 fh_copy(&resp->fh, &argp->fh); 76 resp->status = fh_verify(rqstp, &resp->fh, 0, 77 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); 78 if (resp->status != nfs_ok) 79 goto out; 80 81 resp->status = fh_getattr(&resp->fh, &resp->stat); 82 out: 83 resp->status = nfsd3_map_status(resp->status); 84 return rpc_success; 85 } 86 87 /* 88 * Set a file's attributes 89 */ 90 static __be32 91 nfsd3_proc_setattr(struct svc_rqst *rqstp) 92 { 93 struct nfsd3_sattrargs *argp = rqstp->rq_argp; 94 struct nfsd3_attrstat *resp = rqstp->rq_resp; 95 struct nfsd_attrs attrs = { 96 .na_iattr = &argp->attrs, 97 }; 98 const struct timespec64 *guardtime = NULL; 99 100 dprintk("nfsd: SETATTR(3) %s\n", 101 SVCFH_fmt(&argp->fh)); 102 103 fh_copy(&resp->fh, &argp->fh); 104 if (argp->check_guard) 105 guardtime = &argp->guardtime; 106 resp->status = nfsd_setattr(rqstp, &resp->fh, &attrs, guardtime); 107 resp->status = nfsd3_map_status(resp->status); 108 return rpc_success; 109 } 110 111 /* 112 * Look up a path name component 113 */ 114 static __be32 115 nfsd3_proc_lookup(struct svc_rqst *rqstp) 116 { 117 struct nfsd3_diropargs *argp = rqstp->rq_argp; 118 struct nfsd3_diropres *resp = rqstp->rq_resp; 119 120 dprintk("nfsd: LOOKUP(3) %s %.*s\n", 121 SVCFH_fmt(&argp->fh), 122 argp->len, 123 argp->name); 124 125 fh_copy(&resp->dirfh, &argp->fh); 126 fh_init(&resp->fh, NFS3_FHSIZE); 127 128 resp->status = nfsd_lookup(rqstp, &resp->dirfh, 129 argp->name, argp->len, 130 &resp->fh); 131 resp->status = nfsd3_map_status(resp->status); 132 return rpc_success; 133 } 134 135 /* 136 * Check file access 137 */ 138 static __be32 139 nfsd3_proc_access(struct svc_rqst *rqstp) 140 { 141 struct nfsd3_accessargs *argp = rqstp->rq_argp; 142 struct nfsd3_accessres *resp = rqstp->rq_resp; 143 144 dprintk("nfsd: ACCESS(3) %s 0x%x\n", 145 SVCFH_fmt(&argp->fh), 146 argp->access); 147 148 fh_copy(&resp->fh, &argp->fh); 149 resp->access = argp->access; 150 resp->status = nfsd_access(rqstp, &resp->fh, &resp->access, NULL); 151 resp->status = nfsd3_map_status(resp->status); 152 return rpc_success; 153 } 154 155 /* 156 * Read a symlink. 157 */ 158 static __be32 159 nfsd3_proc_readlink(struct svc_rqst *rqstp) 160 { 161 struct nfsd_fhandle *argp = rqstp->rq_argp; 162 struct nfsd3_readlinkres *resp = rqstp->rq_resp; 163 164 dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh)); 165 166 /* Read the symlink. */ 167 fh_copy(&resp->fh, &argp->fh); 168 resp->len = NFS3_MAXPATHLEN; 169 resp->pages = rqstp->rq_next_page++; 170 resp->status = nfsd_readlink(rqstp, &resp->fh, 171 page_address(*resp->pages), &resp->len); 172 resp->status = nfsd3_map_status(resp->status); 173 return rpc_success; 174 } 175 176 /* 177 * Read a portion of a file. 178 */ 179 static __be32 180 nfsd3_proc_read(struct svc_rqst *rqstp) 181 { 182 struct nfsd3_readargs *argp = rqstp->rq_argp; 183 struct nfsd3_readres *resp = rqstp->rq_resp; 184 185 dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n", 186 SVCFH_fmt(&argp->fh), 187 (unsigned long) argp->count, 188 (unsigned long long) argp->offset); 189 190 argp->count = min_t(u32, argp->count, svc_max_payload(rqstp)); 191 argp->count = min_t(u32, argp->count, rqstp->rq_res.buflen); 192 if (argp->offset > (u64)OFFSET_MAX) 193 argp->offset = (u64)OFFSET_MAX; 194 if (argp->offset + argp->count > (u64)OFFSET_MAX) 195 argp->count = (u64)OFFSET_MAX - argp->offset; 196 197 resp->pages = rqstp->rq_next_page; 198 199 /* Obtain buffer pointer for payload. 200 * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof) 201 * + 1 (xdr opaque byte count) = 26 202 */ 203 resp->count = argp->count; 204 svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3) << 2) + 205 resp->count + 4); 206 207 fh_copy(&resp->fh, &argp->fh); 208 resp->status = nfsd_read(rqstp, &resp->fh, argp->offset, 209 &resp->count, &resp->eof); 210 resp->status = nfsd3_map_status(resp->status); 211 return rpc_success; 212 } 213 214 /* 215 * Write data to a file 216 */ 217 static __be32 218 nfsd3_proc_write(struct svc_rqst *rqstp) 219 { 220 struct nfsd3_writeargs *argp = rqstp->rq_argp; 221 struct nfsd3_writeres *resp = rqstp->rq_resp; 222 unsigned long cnt = argp->len; 223 224 dprintk("nfsd: WRITE(3) %s %d bytes at %Lu%s\n", 225 SVCFH_fmt(&argp->fh), 226 argp->len, 227 (unsigned long long) argp->offset, 228 argp->stable ? " stable" : ""); 229 230 resp->status = nfserr_fbig; 231 if (argp->offset > (u64)OFFSET_MAX || 232 argp->offset + argp->len > (u64)OFFSET_MAX) 233 return rpc_success; 234 235 fh_copy(&resp->fh, &argp->fh); 236 resp->committed = argp->stable; 237 resp->status = nfsd_write(rqstp, &resp->fh, argp->offset, 238 &argp->payload, &cnt, 239 resp->committed, resp->verf); 240 resp->count = cnt; 241 resp->status = nfsd3_map_status(resp->status); 242 return rpc_success; 243 } 244 245 /* 246 * Implement NFSv3's unchecked, guarded, and exclusive CREATE 247 * semantics for regular files. Except for the created file, 248 * this operation is stateless on the server. 249 * 250 * Upon return, caller must release @fhp and @resfhp. 251 */ 252 static __be32 253 nfsd3_create_file(struct svc_rqst *rqstp, struct svc_fh *fhp, 254 struct svc_fh *resfhp, struct nfsd3_createargs *argp) 255 { 256 struct iattr *iap = &argp->attrs; 257 struct dentry *parent, *child; 258 struct nfsd_attrs attrs = { 259 .na_iattr = iap, 260 }; 261 __u32 v_mtime, v_atime; 262 struct inode *inode; 263 __be32 status; 264 int host_err; 265 266 trace_nfsd_vfs_create(rqstp, fhp, S_IFREG, argp->name, argp->len); 267 268 if (isdotent(argp->name, argp->len)) 269 return nfserr_exist; 270 if (!(iap->ia_valid & ATTR_MODE)) 271 iap->ia_mode = 0; 272 273 status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_EXEC); 274 if (status != nfs_ok) 275 return status; 276 277 parent = fhp->fh_dentry; 278 inode = d_inode(parent); 279 280 host_err = fh_want_write(fhp); 281 if (host_err) 282 return nfserrno(host_err); 283 284 child = start_creating(&nop_mnt_idmap, parent, 285 &QSTR_LEN(argp->name, argp->len)); 286 if (IS_ERR(child)) { 287 status = nfserrno(PTR_ERR(child)); 288 goto out_write; 289 } 290 291 if (d_really_is_negative(child)) { 292 status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_CREATE); 293 if (status != nfs_ok) 294 goto out; 295 } 296 297 status = fh_compose(resfhp, fhp->fh_export, child, fhp); 298 if (status != nfs_ok) 299 goto out; 300 301 v_mtime = 0; 302 v_atime = 0; 303 if (argp->createmode == NFS3_CREATE_EXCLUSIVE) { 304 u32 *verifier = (u32 *)argp->verf; 305 306 /* 307 * Solaris 7 gets confused (bugid 4218508) if these have 308 * the high bit set, as do xfs filesystems without the 309 * "bigtime" feature. So just clear the high bits. 310 */ 311 v_mtime = verifier[0] & 0x7fffffff; 312 v_atime = verifier[1] & 0x7fffffff; 313 } 314 315 if (d_really_is_positive(child)) { 316 status = nfs_ok; 317 318 switch (argp->createmode) { 319 case NFS3_CREATE_UNCHECKED: 320 if (!d_is_reg(child)) 321 break; 322 iap->ia_valid &= ATTR_SIZE; 323 goto set_attr; 324 case NFS3_CREATE_GUARDED: 325 status = nfserr_exist; 326 break; 327 case NFS3_CREATE_EXCLUSIVE: 328 if (inode_get_mtime_sec(d_inode(child)) == v_mtime && 329 inode_get_atime_sec(d_inode(child)) == v_atime && 330 d_inode(child)->i_size == 0) { 331 break; 332 } 333 status = nfserr_exist; 334 } 335 goto out; 336 } 337 338 if (!IS_POSIXACL(inode)) 339 iap->ia_mode &= ~current_umask(); 340 341 status = fh_fill_pre_attrs(fhp); 342 if (status != nfs_ok) 343 goto out; 344 host_err = vfs_create(&nop_mnt_idmap, child, iap->ia_mode, NULL); 345 if (host_err < 0) { 346 status = nfserrno(host_err); 347 goto out; 348 } 349 fh_fill_post_attrs(fhp); 350 351 /* A newly created file already has a file size of zero. */ 352 if ((iap->ia_valid & ATTR_SIZE) && (iap->ia_size == 0)) 353 iap->ia_valid &= ~ATTR_SIZE; 354 if (argp->createmode == NFS3_CREATE_EXCLUSIVE) { 355 iap->ia_valid = ATTR_MTIME | ATTR_ATIME | 356 ATTR_MTIME_SET | ATTR_ATIME_SET; 357 iap->ia_mtime.tv_sec = v_mtime; 358 iap->ia_atime.tv_sec = v_atime; 359 iap->ia_mtime.tv_nsec = 0; 360 iap->ia_atime.tv_nsec = 0; 361 } 362 363 set_attr: 364 status = nfsd_create_setattr(rqstp, fhp, resfhp, &attrs); 365 366 out: 367 end_creating(child); 368 out_write: 369 fh_drop_write(fhp); 370 return status; 371 } 372 373 static __be32 374 nfsd3_proc_create(struct svc_rqst *rqstp) 375 { 376 struct nfsd3_createargs *argp = rqstp->rq_argp; 377 struct nfsd3_diropres *resp = rqstp->rq_resp; 378 svc_fh *dirfhp, *newfhp; 379 380 dirfhp = fh_copy(&resp->dirfh, &argp->fh); 381 newfhp = fh_init(&resp->fh, NFS3_FHSIZE); 382 383 resp->status = nfsd3_create_file(rqstp, dirfhp, newfhp, argp); 384 resp->status = nfsd3_map_status(resp->status); 385 return rpc_success; 386 } 387 388 /* 389 * Make directory. This operation is not idempotent. 390 */ 391 static __be32 392 nfsd3_proc_mkdir(struct svc_rqst *rqstp) 393 { 394 struct nfsd3_createargs *argp = rqstp->rq_argp; 395 struct nfsd3_diropres *resp = rqstp->rq_resp; 396 struct nfsd_attrs attrs = { 397 .na_iattr = &argp->attrs, 398 }; 399 400 argp->attrs.ia_valid &= ~ATTR_SIZE; 401 fh_copy(&resp->dirfh, &argp->fh); 402 fh_init(&resp->fh, NFS3_FHSIZE); 403 resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, 404 &attrs, S_IFDIR, 0, &resp->fh); 405 resp->status = nfsd3_map_status(resp->status); 406 return rpc_success; 407 } 408 409 static __be32 410 nfsd3_proc_symlink(struct svc_rqst *rqstp) 411 { 412 struct nfsd3_symlinkargs *argp = rqstp->rq_argp; 413 struct nfsd3_diropres *resp = rqstp->rq_resp; 414 struct nfsd_attrs attrs = { 415 .na_iattr = &argp->attrs, 416 }; 417 418 if (argp->tlen == 0) { 419 resp->status = nfserr_inval; 420 goto out; 421 } 422 if (argp->tlen > NFS3_MAXPATHLEN) { 423 resp->status = nfserr_nametoolong; 424 goto out; 425 } 426 427 argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first, 428 page_address(rqstp->rq_arg.pages[0]), 429 argp->tlen); 430 if (IS_ERR(argp->tname)) { 431 resp->status = nfserrno(PTR_ERR(argp->tname)); 432 goto out; 433 } 434 435 fh_copy(&resp->dirfh, &argp->ffh); 436 fh_init(&resp->fh, NFS3_FHSIZE); 437 resp->status = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, 438 argp->flen, argp->tname, &attrs, &resp->fh); 439 kfree(argp->tname); 440 out: 441 resp->status = nfsd3_map_status(resp->status); 442 return rpc_success; 443 } 444 445 /* 446 * Make socket/fifo/device. 447 */ 448 static __be32 449 nfsd3_proc_mknod(struct svc_rqst *rqstp) 450 { 451 struct nfsd3_mknodargs *argp = rqstp->rq_argp; 452 struct nfsd3_diropres *resp = rqstp->rq_resp; 453 struct nfsd_attrs attrs = { 454 .na_iattr = &argp->attrs, 455 }; 456 int type; 457 dev_t rdev = 0; 458 459 fh_copy(&resp->dirfh, &argp->fh); 460 fh_init(&resp->fh, NFS3_FHSIZE); 461 462 if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) { 463 rdev = MKDEV(argp->major, argp->minor); 464 if (MAJOR(rdev) != argp->major || 465 MINOR(rdev) != argp->minor) { 466 resp->status = nfserr_inval; 467 goto out; 468 } 469 } else if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO) { 470 resp->status = nfserr_badtype; 471 goto out; 472 } 473 474 type = nfs3_ftypes[argp->ftype]; 475 resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, 476 &attrs, type, rdev, &resp->fh); 477 out: 478 resp->status = nfsd3_map_status(resp->status); 479 return rpc_success; 480 } 481 482 /* 483 * Remove file/fifo/socket etc. 484 */ 485 static __be32 486 nfsd3_proc_remove(struct svc_rqst *rqstp) 487 { 488 struct nfsd3_diropargs *argp = rqstp->rq_argp; 489 struct nfsd3_attrstat *resp = rqstp->rq_resp; 490 491 /* Unlink. -S_IFDIR means file must not be a directory */ 492 fh_copy(&resp->fh, &argp->fh); 493 resp->status = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, 494 argp->name, argp->len); 495 resp->status = nfsd3_map_status(resp->status); 496 return rpc_success; 497 } 498 499 /* 500 * Remove a directory 501 */ 502 static __be32 503 nfsd3_proc_rmdir(struct svc_rqst *rqstp) 504 { 505 struct nfsd3_diropargs *argp = rqstp->rq_argp; 506 struct nfsd3_attrstat *resp = rqstp->rq_resp; 507 508 fh_copy(&resp->fh, &argp->fh); 509 resp->status = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, 510 argp->name, argp->len); 511 resp->status = nfsd3_map_status(resp->status); 512 return rpc_success; 513 } 514 515 static __be32 516 nfsd3_proc_rename(struct svc_rqst *rqstp) 517 { 518 struct nfsd3_renameargs *argp = rqstp->rq_argp; 519 struct nfsd3_renameres *resp = rqstp->rq_resp; 520 521 fh_copy(&resp->ffh, &argp->ffh); 522 fh_copy(&resp->tfh, &argp->tfh); 523 resp->status = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen, 524 &resp->tfh, argp->tname, argp->tlen); 525 resp->status = nfsd3_map_status(resp->status); 526 return rpc_success; 527 } 528 529 static __be32 530 nfsd3_proc_link(struct svc_rqst *rqstp) 531 { 532 struct nfsd3_linkargs *argp = rqstp->rq_argp; 533 struct nfsd3_linkres *resp = rqstp->rq_resp; 534 535 fh_copy(&resp->fh, &argp->ffh); 536 fh_copy(&resp->tfh, &argp->tfh); 537 resp->status = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen, 538 &resp->fh); 539 resp->status = nfsd3_map_status(resp->status); 540 return rpc_success; 541 } 542 543 static void nfsd3_init_dirlist_pages(struct svc_rqst *rqstp, 544 struct nfsd3_readdirres *resp, 545 u32 count) 546 { 547 struct xdr_buf *buf = &resp->dirlist; 548 struct xdr_stream *xdr = &resp->xdr; 549 unsigned int sendbuf = min_t(unsigned int, rqstp->rq_res.buflen, 550 svc_max_payload(rqstp)); 551 552 memset(buf, 0, sizeof(*buf)); 553 554 /* Reserve room for the NULL ptr & eof flag (-2 words) */ 555 buf->buflen = clamp(count, (u32)(XDR_UNIT * 2), sendbuf); 556 buf->buflen -= XDR_UNIT * 2; 557 buf->pages = rqstp->rq_next_page; 558 rqstp->rq_next_page += (buf->buflen + PAGE_SIZE - 1) >> PAGE_SHIFT; 559 560 xdr_init_encode_pages(xdr, buf); 561 } 562 563 /* 564 * Read a portion of a directory. 565 */ 566 static __be32 567 nfsd3_proc_readdir(struct svc_rqst *rqstp) 568 { 569 struct nfsd3_readdirargs *argp = rqstp->rq_argp; 570 struct nfsd3_readdirres *resp = rqstp->rq_resp; 571 loff_t offset; 572 573 trace_nfsd_vfs_readdir(rqstp, &argp->fh, argp->count, argp->cookie); 574 575 nfsd3_init_dirlist_pages(rqstp, resp, argp->count); 576 577 fh_copy(&resp->fh, &argp->fh); 578 resp->common.err = nfs_ok; 579 resp->cookie_offset = 0; 580 resp->rqstp = rqstp; 581 offset = argp->cookie; 582 resp->status = nfsd_readdir(rqstp, &resp->fh, &offset, 583 &resp->common, nfs3svc_encode_entry3); 584 memcpy(resp->verf, argp->verf, 8); 585 nfs3svc_encode_cookie3(resp, offset); 586 587 /* Recycle only pages that were part of the reply */ 588 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 589 590 resp->status = nfsd3_map_status(resp->status); 591 return rpc_success; 592 } 593 594 /* 595 * Read a portion of a directory, including file handles and attrs. 596 * For now, we choose to ignore the dircount parameter. 597 */ 598 static __be32 599 nfsd3_proc_readdirplus(struct svc_rqst *rqstp) 600 { 601 struct nfsd3_readdirargs *argp = rqstp->rq_argp; 602 struct nfsd3_readdirres *resp = rqstp->rq_resp; 603 loff_t offset; 604 605 trace_nfsd_vfs_readdir(rqstp, &argp->fh, argp->count, argp->cookie); 606 607 nfsd3_init_dirlist_pages(rqstp, resp, argp->count); 608 609 fh_copy(&resp->fh, &argp->fh); 610 resp->common.err = nfs_ok; 611 resp->cookie_offset = 0; 612 resp->rqstp = rqstp; 613 offset = argp->cookie; 614 615 resp->status = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP); 616 if (resp->status != nfs_ok) 617 goto out; 618 619 if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS) { 620 resp->status = nfserr_notsupp; 621 goto out; 622 } 623 624 resp->status = nfsd_readdir(rqstp, &resp->fh, &offset, 625 &resp->common, nfs3svc_encode_entryplus3); 626 memcpy(resp->verf, argp->verf, 8); 627 nfs3svc_encode_cookie3(resp, offset); 628 629 /* Recycle only pages that were part of the reply */ 630 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 631 632 out: 633 resp->status = nfsd3_map_status(resp->status); 634 return rpc_success; 635 } 636 637 /* 638 * Get file system stats 639 */ 640 static __be32 641 nfsd3_proc_fsstat(struct svc_rqst *rqstp) 642 { 643 struct nfsd_fhandle *argp = rqstp->rq_argp; 644 struct nfsd3_fsstatres *resp = rqstp->rq_resp; 645 646 resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0); 647 fh_put(&argp->fh); 648 resp->status = nfsd3_map_status(resp->status); 649 return rpc_success; 650 } 651 652 /* 653 * Get file system info 654 */ 655 static __be32 656 nfsd3_proc_fsinfo(struct svc_rqst *rqstp) 657 { 658 struct nfsd_fhandle *argp = rqstp->rq_argp; 659 struct nfsd3_fsinfores *resp = rqstp->rq_resp; 660 u32 max_blocksize = svc_max_payload(rqstp); 661 662 dprintk("nfsd: FSINFO(3) %s\n", 663 SVCFH_fmt(&argp->fh)); 664 665 resp->f_rtmax = max_blocksize; 666 resp->f_rtpref = max_blocksize; 667 resp->f_rtmult = PAGE_SIZE; 668 resp->f_wtmax = max_blocksize; 669 resp->f_wtpref = max_blocksize; 670 resp->f_wtmult = PAGE_SIZE; 671 resp->f_dtpref = max_blocksize; 672 resp->f_maxfilesize = ~(u32) 0; 673 resp->f_properties = NFS3_FSF_DEFAULT; 674 675 resp->status = fh_verify(rqstp, &argp->fh, 0, 676 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); 677 678 /* Check special features of the file system. May request 679 * different read/write sizes for file systems known to have 680 * problems with large blocks */ 681 if (resp->status == nfs_ok) { 682 struct super_block *sb = argp->fh.fh_dentry->d_sb; 683 684 /* Note that we don't care for remote fs's here */ 685 if (sb->s_magic == MSDOS_SUPER_MAGIC) { 686 resp->f_properties = NFS3_FSF_BILLYBOY; 687 } 688 resp->f_maxfilesize = sb->s_maxbytes; 689 } 690 691 fh_put(&argp->fh); 692 resp->status = nfsd3_map_status(resp->status); 693 return rpc_success; 694 } 695 696 /* 697 * Get pathconf info for the specified file 698 */ 699 static __be32 700 nfsd3_proc_pathconf(struct svc_rqst *rqstp) 701 { 702 struct nfsd_fhandle *argp = rqstp->rq_argp; 703 struct nfsd3_pathconfres *resp = rqstp->rq_resp; 704 705 dprintk("nfsd: PATHCONF(3) %s\n", 706 SVCFH_fmt(&argp->fh)); 707 708 /* Set default pathconf */ 709 resp->p_link_max = 255; /* at least */ 710 resp->p_name_max = 255; /* at least */ 711 resp->p_no_trunc = 0; 712 resp->p_chown_restricted = 1; 713 resp->p_case_insensitive = 0; 714 resp->p_case_preserving = 1; 715 716 resp->status = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP); 717 718 if (resp->status == nfs_ok) { 719 struct super_block *sb = argp->fh.fh_dentry->d_sb; 720 721 /* Note that we don't care for remote fs's here */ 722 switch (sb->s_magic) { 723 case EXT2_SUPER_MAGIC: 724 resp->p_link_max = EXT2_LINK_MAX; 725 resp->p_name_max = EXT2_NAME_LEN; 726 break; 727 case MSDOS_SUPER_MAGIC: 728 resp->p_case_insensitive = 1; 729 resp->p_case_preserving = 0; 730 break; 731 } 732 } 733 734 fh_put(&argp->fh); 735 resp->status = nfsd3_map_status(resp->status); 736 return rpc_success; 737 } 738 739 /* 740 * Commit a file (range) to stable storage. 741 */ 742 static __be32 743 nfsd3_proc_commit(struct svc_rqst *rqstp) 744 { 745 struct nfsd3_commitargs *argp = rqstp->rq_argp; 746 struct nfsd3_commitres *resp = rqstp->rq_resp; 747 struct nfsd_file *nf; 748 749 dprintk("nfsd: COMMIT(3) %s %u@%Lu\n", 750 SVCFH_fmt(&argp->fh), 751 argp->count, 752 (unsigned long long) argp->offset); 753 754 fh_copy(&resp->fh, &argp->fh); 755 resp->status = nfsd_file_acquire_gc(rqstp, &resp->fh, NFSD_MAY_WRITE | 756 NFSD_MAY_NOT_BREAK_LEASE, &nf); 757 if (resp->status) 758 goto out; 759 resp->status = nfsd_commit(rqstp, &resp->fh, nf, argp->offset, 760 argp->count, resp->verf); 761 nfsd_file_put(nf); 762 out: 763 resp->status = nfsd3_map_status(resp->status); 764 return rpc_success; 765 } 766 767 768 /* 769 * NFSv3 Server procedures. 770 * Only the results of non-idempotent operations are cached. 771 */ 772 #define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat 773 #define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat 774 #define nfsd3_mkdirargs nfsd3_createargs 775 #define nfsd3_readdirplusargs nfsd3_readdirargs 776 #define nfsd3_fhandleargs nfsd_fhandle 777 #define nfsd3_attrstatres nfsd3_attrstat 778 #define nfsd3_wccstatres nfsd3_attrstat 779 #define nfsd3_createres nfsd3_diropres 780 781 #define ST 1 /* status*/ 782 #define FH 17 /* filehandle with length */ 783 #define AT 21 /* attributes */ 784 #define pAT (1+AT) /* post attributes - conditional */ 785 #define WC (7+pAT) /* WCC attributes */ 786 787 static const struct svc_procedure nfsd_procedures3[22] = { 788 [NFS3PROC_NULL] = { 789 .pc_func = nfsd3_proc_null, 790 .pc_decode = nfssvc_decode_voidarg, 791 .pc_encode = nfssvc_encode_voidres, 792 .pc_argsize = sizeof(struct nfsd_voidargs), 793 .pc_argzero = sizeof(struct nfsd_voidargs), 794 .pc_ressize = sizeof(struct nfsd_voidres), 795 .pc_cachetype = RC_NOCACHE, 796 .pc_xdrressize = ST, 797 .pc_name = "NULL", 798 }, 799 [NFS3PROC_GETATTR] = { 800 .pc_func = nfsd3_proc_getattr, 801 .pc_decode = nfs3svc_decode_fhandleargs, 802 .pc_encode = nfs3svc_encode_getattrres, 803 .pc_release = nfs3svc_release_fhandle, 804 .pc_argsize = sizeof(struct nfsd_fhandle), 805 .pc_argzero = sizeof(struct nfsd_fhandle), 806 .pc_ressize = sizeof(struct nfsd3_attrstatres), 807 .pc_cachetype = RC_NOCACHE, 808 .pc_xdrressize = ST+AT, 809 .pc_name = "GETATTR", 810 }, 811 [NFS3PROC_SETATTR] = { 812 .pc_func = nfsd3_proc_setattr, 813 .pc_decode = nfs3svc_decode_sattrargs, 814 .pc_encode = nfs3svc_encode_wccstatres, 815 .pc_release = nfs3svc_release_fhandle, 816 .pc_argsize = sizeof(struct nfsd3_sattrargs), 817 .pc_argzero = sizeof(struct nfsd3_sattrargs), 818 .pc_ressize = sizeof(struct nfsd3_wccstatres), 819 .pc_cachetype = RC_REPLBUFF, 820 .pc_xdrressize = ST+WC, 821 .pc_name = "SETATTR", 822 }, 823 [NFS3PROC_LOOKUP] = { 824 .pc_func = nfsd3_proc_lookup, 825 .pc_decode = nfs3svc_decode_diropargs, 826 .pc_encode = nfs3svc_encode_lookupres, 827 .pc_release = nfs3svc_release_fhandle2, 828 .pc_argsize = sizeof(struct nfsd3_diropargs), 829 .pc_argzero = sizeof(struct nfsd3_diropargs), 830 .pc_ressize = sizeof(struct nfsd3_diropres), 831 .pc_cachetype = RC_NOCACHE, 832 .pc_xdrressize = ST+FH+pAT+pAT, 833 .pc_name = "LOOKUP", 834 }, 835 [NFS3PROC_ACCESS] = { 836 .pc_func = nfsd3_proc_access, 837 .pc_decode = nfs3svc_decode_accessargs, 838 .pc_encode = nfs3svc_encode_accessres, 839 .pc_release = nfs3svc_release_fhandle, 840 .pc_argsize = sizeof(struct nfsd3_accessargs), 841 .pc_argzero = sizeof(struct nfsd3_accessargs), 842 .pc_ressize = sizeof(struct nfsd3_accessres), 843 .pc_cachetype = RC_NOCACHE, 844 .pc_xdrressize = ST+pAT+1, 845 .pc_name = "ACCESS", 846 }, 847 [NFS3PROC_READLINK] = { 848 .pc_func = nfsd3_proc_readlink, 849 .pc_decode = nfs3svc_decode_fhandleargs, 850 .pc_encode = nfs3svc_encode_readlinkres, 851 .pc_release = nfs3svc_release_fhandle, 852 .pc_argsize = sizeof(struct nfsd_fhandle), 853 .pc_argzero = sizeof(struct nfsd_fhandle), 854 .pc_ressize = sizeof(struct nfsd3_readlinkres), 855 .pc_cachetype = RC_NOCACHE, 856 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4, 857 .pc_name = "READLINK", 858 }, 859 [NFS3PROC_READ] = { 860 .pc_func = nfsd3_proc_read, 861 .pc_decode = nfs3svc_decode_readargs, 862 .pc_encode = nfs3svc_encode_readres, 863 .pc_release = nfs3svc_release_fhandle, 864 .pc_argsize = sizeof(struct nfsd3_readargs), 865 .pc_argzero = sizeof(struct nfsd3_readargs), 866 .pc_ressize = sizeof(struct nfsd3_readres), 867 .pc_cachetype = RC_NOCACHE, 868 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4, 869 .pc_name = "READ", 870 }, 871 [NFS3PROC_WRITE] = { 872 .pc_func = nfsd3_proc_write, 873 .pc_decode = nfs3svc_decode_writeargs, 874 .pc_encode = nfs3svc_encode_writeres, 875 .pc_release = nfs3svc_release_fhandle, 876 .pc_argsize = sizeof(struct nfsd3_writeargs), 877 .pc_argzero = sizeof(struct nfsd3_writeargs), 878 .pc_ressize = sizeof(struct nfsd3_writeres), 879 .pc_cachetype = RC_REPLBUFF, 880 .pc_xdrressize = ST+WC+4, 881 .pc_name = "WRITE", 882 }, 883 [NFS3PROC_CREATE] = { 884 .pc_func = nfsd3_proc_create, 885 .pc_decode = nfs3svc_decode_createargs, 886 .pc_encode = nfs3svc_encode_createres, 887 .pc_release = nfs3svc_release_fhandle2, 888 .pc_argsize = sizeof(struct nfsd3_createargs), 889 .pc_argzero = sizeof(struct nfsd3_createargs), 890 .pc_ressize = sizeof(struct nfsd3_createres), 891 .pc_cachetype = RC_REPLBUFF, 892 .pc_xdrressize = ST+(1+FH+pAT)+WC, 893 .pc_name = "CREATE", 894 }, 895 [NFS3PROC_MKDIR] = { 896 .pc_func = nfsd3_proc_mkdir, 897 .pc_decode = nfs3svc_decode_mkdirargs, 898 .pc_encode = nfs3svc_encode_createres, 899 .pc_release = nfs3svc_release_fhandle2, 900 .pc_argsize = sizeof(struct nfsd3_mkdirargs), 901 .pc_argzero = sizeof(struct nfsd3_mkdirargs), 902 .pc_ressize = sizeof(struct nfsd3_createres), 903 .pc_cachetype = RC_REPLBUFF, 904 .pc_xdrressize = ST+(1+FH+pAT)+WC, 905 .pc_name = "MKDIR", 906 }, 907 [NFS3PROC_SYMLINK] = { 908 .pc_func = nfsd3_proc_symlink, 909 .pc_decode = nfs3svc_decode_symlinkargs, 910 .pc_encode = nfs3svc_encode_createres, 911 .pc_release = nfs3svc_release_fhandle2, 912 .pc_argsize = sizeof(struct nfsd3_symlinkargs), 913 .pc_argzero = sizeof(struct nfsd3_symlinkargs), 914 .pc_ressize = sizeof(struct nfsd3_createres), 915 .pc_cachetype = RC_REPLBUFF, 916 .pc_xdrressize = ST+(1+FH+pAT)+WC, 917 .pc_name = "SYMLINK", 918 }, 919 [NFS3PROC_MKNOD] = { 920 .pc_func = nfsd3_proc_mknod, 921 .pc_decode = nfs3svc_decode_mknodargs, 922 .pc_encode = nfs3svc_encode_createres, 923 .pc_release = nfs3svc_release_fhandle2, 924 .pc_argsize = sizeof(struct nfsd3_mknodargs), 925 .pc_argzero = sizeof(struct nfsd3_mknodargs), 926 .pc_ressize = sizeof(struct nfsd3_createres), 927 .pc_cachetype = RC_REPLBUFF, 928 .pc_xdrressize = ST+(1+FH+pAT)+WC, 929 .pc_name = "MKNOD", 930 }, 931 [NFS3PROC_REMOVE] = { 932 .pc_func = nfsd3_proc_remove, 933 .pc_decode = nfs3svc_decode_diropargs, 934 .pc_encode = nfs3svc_encode_wccstatres, 935 .pc_release = nfs3svc_release_fhandle, 936 .pc_argsize = sizeof(struct nfsd3_diropargs), 937 .pc_argzero = sizeof(struct nfsd3_diropargs), 938 .pc_ressize = sizeof(struct nfsd3_wccstatres), 939 .pc_cachetype = RC_REPLBUFF, 940 .pc_xdrressize = ST+WC, 941 .pc_name = "REMOVE", 942 }, 943 [NFS3PROC_RMDIR] = { 944 .pc_func = nfsd3_proc_rmdir, 945 .pc_decode = nfs3svc_decode_diropargs, 946 .pc_encode = nfs3svc_encode_wccstatres, 947 .pc_release = nfs3svc_release_fhandle, 948 .pc_argsize = sizeof(struct nfsd3_diropargs), 949 .pc_argzero = sizeof(struct nfsd3_diropargs), 950 .pc_ressize = sizeof(struct nfsd3_wccstatres), 951 .pc_cachetype = RC_REPLBUFF, 952 .pc_xdrressize = ST+WC, 953 .pc_name = "RMDIR", 954 }, 955 [NFS3PROC_RENAME] = { 956 .pc_func = nfsd3_proc_rename, 957 .pc_decode = nfs3svc_decode_renameargs, 958 .pc_encode = nfs3svc_encode_renameres, 959 .pc_release = nfs3svc_release_fhandle2, 960 .pc_argsize = sizeof(struct nfsd3_renameargs), 961 .pc_argzero = sizeof(struct nfsd3_renameargs), 962 .pc_ressize = sizeof(struct nfsd3_renameres), 963 .pc_cachetype = RC_REPLBUFF, 964 .pc_xdrressize = ST+WC+WC, 965 .pc_name = "RENAME", 966 }, 967 [NFS3PROC_LINK] = { 968 .pc_func = nfsd3_proc_link, 969 .pc_decode = nfs3svc_decode_linkargs, 970 .pc_encode = nfs3svc_encode_linkres, 971 .pc_release = nfs3svc_release_fhandle2, 972 .pc_argsize = sizeof(struct nfsd3_linkargs), 973 .pc_argzero = sizeof(struct nfsd3_linkargs), 974 .pc_ressize = sizeof(struct nfsd3_linkres), 975 .pc_cachetype = RC_REPLBUFF, 976 .pc_xdrressize = ST+pAT+WC, 977 .pc_name = "LINK", 978 }, 979 [NFS3PROC_READDIR] = { 980 .pc_func = nfsd3_proc_readdir, 981 .pc_decode = nfs3svc_decode_readdirargs, 982 .pc_encode = nfs3svc_encode_readdirres, 983 .pc_release = nfs3svc_release_fhandle, 984 .pc_argsize = sizeof(struct nfsd3_readdirargs), 985 .pc_argzero = sizeof(struct nfsd3_readdirargs), 986 .pc_ressize = sizeof(struct nfsd3_readdirres), 987 .pc_cachetype = RC_NOCACHE, 988 .pc_name = "READDIR", 989 }, 990 [NFS3PROC_READDIRPLUS] = { 991 .pc_func = nfsd3_proc_readdirplus, 992 .pc_decode = nfs3svc_decode_readdirplusargs, 993 .pc_encode = nfs3svc_encode_readdirres, 994 .pc_release = nfs3svc_release_fhandle, 995 .pc_argsize = sizeof(struct nfsd3_readdirplusargs), 996 .pc_argzero = sizeof(struct nfsd3_readdirplusargs), 997 .pc_ressize = sizeof(struct nfsd3_readdirres), 998 .pc_cachetype = RC_NOCACHE, 999 .pc_name = "READDIRPLUS", 1000 }, 1001 [NFS3PROC_FSSTAT] = { 1002 .pc_func = nfsd3_proc_fsstat, 1003 .pc_decode = nfs3svc_decode_fhandleargs, 1004 .pc_encode = nfs3svc_encode_fsstatres, 1005 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 1006 .pc_argzero = sizeof(struct nfsd3_fhandleargs), 1007 .pc_ressize = sizeof(struct nfsd3_fsstatres), 1008 .pc_cachetype = RC_NOCACHE, 1009 .pc_xdrressize = ST+pAT+2*6+1, 1010 .pc_name = "FSSTAT", 1011 }, 1012 [NFS3PROC_FSINFO] = { 1013 .pc_func = nfsd3_proc_fsinfo, 1014 .pc_decode = nfs3svc_decode_fhandleargs, 1015 .pc_encode = nfs3svc_encode_fsinfores, 1016 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 1017 .pc_argzero = sizeof(struct nfsd3_fhandleargs), 1018 .pc_ressize = sizeof(struct nfsd3_fsinfores), 1019 .pc_cachetype = RC_NOCACHE, 1020 .pc_xdrressize = ST+pAT+12, 1021 .pc_name = "FSINFO", 1022 }, 1023 [NFS3PROC_PATHCONF] = { 1024 .pc_func = nfsd3_proc_pathconf, 1025 .pc_decode = nfs3svc_decode_fhandleargs, 1026 .pc_encode = nfs3svc_encode_pathconfres, 1027 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 1028 .pc_argzero = sizeof(struct nfsd3_fhandleargs), 1029 .pc_ressize = sizeof(struct nfsd3_pathconfres), 1030 .pc_cachetype = RC_NOCACHE, 1031 .pc_xdrressize = ST+pAT+6, 1032 .pc_name = "PATHCONF", 1033 }, 1034 [NFS3PROC_COMMIT] = { 1035 .pc_func = nfsd3_proc_commit, 1036 .pc_decode = nfs3svc_decode_commitargs, 1037 .pc_encode = nfs3svc_encode_commitres, 1038 .pc_release = nfs3svc_release_fhandle, 1039 .pc_argsize = sizeof(struct nfsd3_commitargs), 1040 .pc_argzero = sizeof(struct nfsd3_commitargs), 1041 .pc_ressize = sizeof(struct nfsd3_commitres), 1042 .pc_cachetype = RC_NOCACHE, 1043 .pc_xdrressize = ST+WC+2, 1044 .pc_name = "COMMIT", 1045 }, 1046 }; 1047 1048 static DEFINE_PER_CPU_ALIGNED(unsigned long, 1049 nfsd_count3[ARRAY_SIZE(nfsd_procedures3)]); 1050 const struct svc_version nfsd_version3 = { 1051 .vs_vers = 3, 1052 .vs_nproc = ARRAY_SIZE(nfsd_procedures3), 1053 .vs_proc = nfsd_procedures3, 1054 .vs_dispatch = nfsd_dispatch, 1055 .vs_count = nfsd_count3, 1056 .vs_xdrsize = NFS3_SVC_XDRSIZE, 1057 }; 1058