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 18 #define NFSDDBG_FACILITY NFSDDBG_PROC 19 20 static int nfs3_ftypes[] = { 21 0, /* NF3NON */ 22 S_IFREG, /* NF3REG */ 23 S_IFDIR, /* NF3DIR */ 24 S_IFBLK, /* NF3BLK */ 25 S_IFCHR, /* NF3CHR */ 26 S_IFLNK, /* NF3LNK */ 27 S_IFSOCK, /* NF3SOCK */ 28 S_IFIFO, /* NF3FIFO */ 29 }; 30 31 /* 32 * NULL call. 33 */ 34 static __be32 35 nfsd3_proc_null(struct svc_rqst *rqstp) 36 { 37 return rpc_success; 38 } 39 40 /* 41 * Get a file's attributes 42 */ 43 static __be32 44 nfsd3_proc_getattr(struct svc_rqst *rqstp) 45 { 46 struct nfsd_fhandle *argp = rqstp->rq_argp; 47 struct nfsd3_attrstat *resp = rqstp->rq_resp; 48 49 dprintk("nfsd: GETATTR(3) %s\n", 50 SVCFH_fmt(&argp->fh)); 51 52 fh_copy(&resp->fh, &argp->fh); 53 resp->status = fh_verify(rqstp, &resp->fh, 0, 54 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); 55 if (resp->status != nfs_ok) 56 goto out; 57 58 resp->status = fh_getattr(&resp->fh, &resp->stat); 59 out: 60 return rpc_success; 61 } 62 63 /* 64 * Set a file's attributes 65 */ 66 static __be32 67 nfsd3_proc_setattr(struct svc_rqst *rqstp) 68 { 69 struct nfsd3_sattrargs *argp = rqstp->rq_argp; 70 struct nfsd3_attrstat *resp = rqstp->rq_resp; 71 struct nfsd_attrs attrs = { 72 .na_iattr = &argp->attrs, 73 }; 74 75 dprintk("nfsd: SETATTR(3) %s\n", 76 SVCFH_fmt(&argp->fh)); 77 78 fh_copy(&resp->fh, &argp->fh); 79 resp->status = nfsd_setattr(rqstp, &resp->fh, &attrs, 80 argp->check_guard, argp->guardtime); 81 return rpc_success; 82 } 83 84 /* 85 * Look up a path name component 86 */ 87 static __be32 88 nfsd3_proc_lookup(struct svc_rqst *rqstp) 89 { 90 struct nfsd3_diropargs *argp = rqstp->rq_argp; 91 struct nfsd3_diropres *resp = rqstp->rq_resp; 92 93 dprintk("nfsd: LOOKUP(3) %s %.*s\n", 94 SVCFH_fmt(&argp->fh), 95 argp->len, 96 argp->name); 97 98 fh_copy(&resp->dirfh, &argp->fh); 99 fh_init(&resp->fh, NFS3_FHSIZE); 100 101 resp->status = nfsd_lookup(rqstp, &resp->dirfh, 102 argp->name, argp->len, 103 &resp->fh); 104 return rpc_success; 105 } 106 107 /* 108 * Check file access 109 */ 110 static __be32 111 nfsd3_proc_access(struct svc_rqst *rqstp) 112 { 113 struct nfsd3_accessargs *argp = rqstp->rq_argp; 114 struct nfsd3_accessres *resp = rqstp->rq_resp; 115 116 dprintk("nfsd: ACCESS(3) %s 0x%x\n", 117 SVCFH_fmt(&argp->fh), 118 argp->access); 119 120 fh_copy(&resp->fh, &argp->fh); 121 resp->access = argp->access; 122 resp->status = nfsd_access(rqstp, &resp->fh, &resp->access, NULL); 123 return rpc_success; 124 } 125 126 /* 127 * Read a symlink. 128 */ 129 static __be32 130 nfsd3_proc_readlink(struct svc_rqst *rqstp) 131 { 132 struct nfsd_fhandle *argp = rqstp->rq_argp; 133 struct nfsd3_readlinkres *resp = rqstp->rq_resp; 134 135 dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh)); 136 137 /* Read the symlink. */ 138 fh_copy(&resp->fh, &argp->fh); 139 resp->len = NFS3_MAXPATHLEN; 140 resp->pages = rqstp->rq_next_page++; 141 resp->status = nfsd_readlink(rqstp, &resp->fh, 142 page_address(*resp->pages), &resp->len); 143 return rpc_success; 144 } 145 146 /* 147 * Read a portion of a file. 148 */ 149 static __be32 150 nfsd3_proc_read(struct svc_rqst *rqstp) 151 { 152 struct nfsd3_readargs *argp = rqstp->rq_argp; 153 struct nfsd3_readres *resp = rqstp->rq_resp; 154 155 dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n", 156 SVCFH_fmt(&argp->fh), 157 (unsigned long) argp->count, 158 (unsigned long long) argp->offset); 159 160 argp->count = min_t(u32, argp->count, svc_max_payload(rqstp)); 161 argp->count = min_t(u32, argp->count, rqstp->rq_res.buflen); 162 if (argp->offset > (u64)OFFSET_MAX) 163 argp->offset = (u64)OFFSET_MAX; 164 if (argp->offset + argp->count > (u64)OFFSET_MAX) 165 argp->count = (u64)OFFSET_MAX - argp->offset; 166 167 resp->pages = rqstp->rq_next_page; 168 169 /* Obtain buffer pointer for payload. 170 * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof) 171 * + 1 (xdr opaque byte count) = 26 172 */ 173 resp->count = argp->count; 174 svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4); 175 176 fh_copy(&resp->fh, &argp->fh); 177 resp->status = nfsd_read(rqstp, &resp->fh, argp->offset, 178 &resp->count, &resp->eof); 179 return rpc_success; 180 } 181 182 /* 183 * Write data to a file 184 */ 185 static __be32 186 nfsd3_proc_write(struct svc_rqst *rqstp) 187 { 188 struct nfsd3_writeargs *argp = rqstp->rq_argp; 189 struct nfsd3_writeres *resp = rqstp->rq_resp; 190 unsigned long cnt = argp->len; 191 unsigned int nvecs; 192 193 dprintk("nfsd: WRITE(3) %s %d bytes at %Lu%s\n", 194 SVCFH_fmt(&argp->fh), 195 argp->len, 196 (unsigned long long) argp->offset, 197 argp->stable? " stable" : ""); 198 199 resp->status = nfserr_fbig; 200 if (argp->offset > (u64)OFFSET_MAX || 201 argp->offset + argp->len > (u64)OFFSET_MAX) 202 return rpc_success; 203 204 fh_copy(&resp->fh, &argp->fh); 205 resp->committed = argp->stable; 206 nvecs = svc_fill_write_vector(rqstp, &argp->payload); 207 208 resp->status = nfsd_write(rqstp, &resp->fh, argp->offset, 209 rqstp->rq_vec, nvecs, &cnt, 210 resp->committed, resp->verf); 211 resp->count = cnt; 212 return rpc_success; 213 } 214 215 /* 216 * Implement NFSv3's unchecked, guarded, and exclusive CREATE 217 * semantics for regular files. Except for the created file, 218 * this operation is stateless on the server. 219 * 220 * Upon return, caller must release @fhp and @resfhp. 221 */ 222 static __be32 223 nfsd3_create_file(struct svc_rqst *rqstp, struct svc_fh *fhp, 224 struct svc_fh *resfhp, struct nfsd3_createargs *argp) 225 { 226 struct iattr *iap = &argp->attrs; 227 struct dentry *parent, *child; 228 struct nfsd_attrs attrs = { 229 .na_iattr = iap, 230 }; 231 __u32 v_mtime, v_atime; 232 struct inode *inode; 233 __be32 status; 234 int host_err; 235 236 if (isdotent(argp->name, argp->len)) 237 return nfserr_exist; 238 if (!(iap->ia_valid & ATTR_MODE)) 239 iap->ia_mode = 0; 240 241 status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_EXEC); 242 if (status != nfs_ok) 243 return status; 244 245 parent = fhp->fh_dentry; 246 inode = d_inode(parent); 247 248 host_err = fh_want_write(fhp); 249 if (host_err) 250 return nfserrno(host_err); 251 252 inode_lock_nested(inode, I_MUTEX_PARENT); 253 254 child = lookup_one_len(argp->name, parent, argp->len); 255 if (IS_ERR(child)) { 256 status = nfserrno(PTR_ERR(child)); 257 goto out; 258 } 259 260 if (d_really_is_negative(child)) { 261 status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_CREATE); 262 if (status != nfs_ok) 263 goto out; 264 } 265 266 status = fh_compose(resfhp, fhp->fh_export, child, fhp); 267 if (status != nfs_ok) 268 goto out; 269 270 v_mtime = 0; 271 v_atime = 0; 272 if (argp->createmode == NFS3_CREATE_EXCLUSIVE) { 273 u32 *verifier = (u32 *)argp->verf; 274 275 /* 276 * Solaris 7 gets confused (bugid 4218508) if these have 277 * the high bit set, as do xfs filesystems without the 278 * "bigtime" feature. So just clear the high bits. 279 */ 280 v_mtime = verifier[0] & 0x7fffffff; 281 v_atime = verifier[1] & 0x7fffffff; 282 } 283 284 if (d_really_is_positive(child)) { 285 status = nfs_ok; 286 287 switch (argp->createmode) { 288 case NFS3_CREATE_UNCHECKED: 289 if (!d_is_reg(child)) 290 break; 291 iap->ia_valid &= ATTR_SIZE; 292 goto set_attr; 293 case NFS3_CREATE_GUARDED: 294 status = nfserr_exist; 295 break; 296 case NFS3_CREATE_EXCLUSIVE: 297 if (d_inode(child)->i_mtime.tv_sec == v_mtime && 298 d_inode(child)->i_atime.tv_sec == v_atime && 299 d_inode(child)->i_size == 0) { 300 break; 301 } 302 status = nfserr_exist; 303 } 304 goto out; 305 } 306 307 if (!IS_POSIXACL(inode)) 308 iap->ia_mode &= ~current_umask(); 309 310 fh_fill_pre_attrs(fhp); 311 host_err = vfs_create(&nop_mnt_idmap, inode, child, iap->ia_mode, true); 312 if (host_err < 0) { 313 status = nfserrno(host_err); 314 goto out; 315 } 316 fh_fill_post_attrs(fhp); 317 318 /* A newly created file already has a file size of zero. */ 319 if ((iap->ia_valid & ATTR_SIZE) && (iap->ia_size == 0)) 320 iap->ia_valid &= ~ATTR_SIZE; 321 if (argp->createmode == NFS3_CREATE_EXCLUSIVE) { 322 iap->ia_valid = ATTR_MTIME | ATTR_ATIME | 323 ATTR_MTIME_SET | ATTR_ATIME_SET; 324 iap->ia_mtime.tv_sec = v_mtime; 325 iap->ia_atime.tv_sec = v_atime; 326 iap->ia_mtime.tv_nsec = 0; 327 iap->ia_atime.tv_nsec = 0; 328 } 329 330 set_attr: 331 status = nfsd_create_setattr(rqstp, fhp, resfhp, &attrs); 332 333 out: 334 inode_unlock(inode); 335 if (child && !IS_ERR(child)) 336 dput(child); 337 fh_drop_write(fhp); 338 return status; 339 } 340 341 static __be32 342 nfsd3_proc_create(struct svc_rqst *rqstp) 343 { 344 struct nfsd3_createargs *argp = rqstp->rq_argp; 345 struct nfsd3_diropres *resp = rqstp->rq_resp; 346 svc_fh *dirfhp, *newfhp; 347 348 dprintk("nfsd: CREATE(3) %s %.*s\n", 349 SVCFH_fmt(&argp->fh), 350 argp->len, 351 argp->name); 352 353 dirfhp = fh_copy(&resp->dirfh, &argp->fh); 354 newfhp = fh_init(&resp->fh, NFS3_FHSIZE); 355 356 resp->status = nfsd3_create_file(rqstp, dirfhp, newfhp, argp); 357 return rpc_success; 358 } 359 360 /* 361 * Make directory. This operation is not idempotent. 362 */ 363 static __be32 364 nfsd3_proc_mkdir(struct svc_rqst *rqstp) 365 { 366 struct nfsd3_createargs *argp = rqstp->rq_argp; 367 struct nfsd3_diropres *resp = rqstp->rq_resp; 368 struct nfsd_attrs attrs = { 369 .na_iattr = &argp->attrs, 370 }; 371 372 dprintk("nfsd: MKDIR(3) %s %.*s\n", 373 SVCFH_fmt(&argp->fh), 374 argp->len, 375 argp->name); 376 377 argp->attrs.ia_valid &= ~ATTR_SIZE; 378 fh_copy(&resp->dirfh, &argp->fh); 379 fh_init(&resp->fh, NFS3_FHSIZE); 380 resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, 381 &attrs, S_IFDIR, 0, &resp->fh); 382 return rpc_success; 383 } 384 385 static __be32 386 nfsd3_proc_symlink(struct svc_rqst *rqstp) 387 { 388 struct nfsd3_symlinkargs *argp = rqstp->rq_argp; 389 struct nfsd3_diropres *resp = rqstp->rq_resp; 390 struct nfsd_attrs attrs = { 391 .na_iattr = &argp->attrs, 392 }; 393 394 if (argp->tlen == 0) { 395 resp->status = nfserr_inval; 396 goto out; 397 } 398 if (argp->tlen > NFS3_MAXPATHLEN) { 399 resp->status = nfserr_nametoolong; 400 goto out; 401 } 402 403 argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first, 404 page_address(rqstp->rq_arg.pages[0]), 405 argp->tlen); 406 if (IS_ERR(argp->tname)) { 407 resp->status = nfserrno(PTR_ERR(argp->tname)); 408 goto out; 409 } 410 411 dprintk("nfsd: SYMLINK(3) %s %.*s -> %.*s\n", 412 SVCFH_fmt(&argp->ffh), 413 argp->flen, argp->fname, 414 argp->tlen, argp->tname); 415 416 fh_copy(&resp->dirfh, &argp->ffh); 417 fh_init(&resp->fh, NFS3_FHSIZE); 418 resp->status = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, 419 argp->flen, argp->tname, &attrs, &resp->fh); 420 kfree(argp->tname); 421 out: 422 return rpc_success; 423 } 424 425 /* 426 * Make socket/fifo/device. 427 */ 428 static __be32 429 nfsd3_proc_mknod(struct svc_rqst *rqstp) 430 { 431 struct nfsd3_mknodargs *argp = rqstp->rq_argp; 432 struct nfsd3_diropres *resp = rqstp->rq_resp; 433 struct nfsd_attrs attrs = { 434 .na_iattr = &argp->attrs, 435 }; 436 int type; 437 dev_t rdev = 0; 438 439 dprintk("nfsd: MKNOD(3) %s %.*s\n", 440 SVCFH_fmt(&argp->fh), 441 argp->len, 442 argp->name); 443 444 fh_copy(&resp->dirfh, &argp->fh); 445 fh_init(&resp->fh, NFS3_FHSIZE); 446 447 if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) { 448 rdev = MKDEV(argp->major, argp->minor); 449 if (MAJOR(rdev) != argp->major || 450 MINOR(rdev) != argp->minor) { 451 resp->status = nfserr_inval; 452 goto out; 453 } 454 } else if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO) { 455 resp->status = nfserr_badtype; 456 goto out; 457 } 458 459 type = nfs3_ftypes[argp->ftype]; 460 resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, 461 &attrs, type, rdev, &resp->fh); 462 out: 463 return rpc_success; 464 } 465 466 /* 467 * Remove file/fifo/socket etc. 468 */ 469 static __be32 470 nfsd3_proc_remove(struct svc_rqst *rqstp) 471 { 472 struct nfsd3_diropargs *argp = rqstp->rq_argp; 473 struct nfsd3_attrstat *resp = rqstp->rq_resp; 474 475 dprintk("nfsd: REMOVE(3) %s %.*s\n", 476 SVCFH_fmt(&argp->fh), 477 argp->len, 478 argp->name); 479 480 /* Unlink. -S_IFDIR means file must not be a directory */ 481 fh_copy(&resp->fh, &argp->fh); 482 resp->status = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, 483 argp->name, argp->len); 484 return rpc_success; 485 } 486 487 /* 488 * Remove a directory 489 */ 490 static __be32 491 nfsd3_proc_rmdir(struct svc_rqst *rqstp) 492 { 493 struct nfsd3_diropargs *argp = rqstp->rq_argp; 494 struct nfsd3_attrstat *resp = rqstp->rq_resp; 495 496 dprintk("nfsd: RMDIR(3) %s %.*s\n", 497 SVCFH_fmt(&argp->fh), 498 argp->len, 499 argp->name); 500 501 fh_copy(&resp->fh, &argp->fh); 502 resp->status = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, 503 argp->name, argp->len); 504 return rpc_success; 505 } 506 507 static __be32 508 nfsd3_proc_rename(struct svc_rqst *rqstp) 509 { 510 struct nfsd3_renameargs *argp = rqstp->rq_argp; 511 struct nfsd3_renameres *resp = rqstp->rq_resp; 512 513 dprintk("nfsd: RENAME(3) %s %.*s ->\n", 514 SVCFH_fmt(&argp->ffh), 515 argp->flen, 516 argp->fname); 517 dprintk("nfsd: -> %s %.*s\n", 518 SVCFH_fmt(&argp->tfh), 519 argp->tlen, 520 argp->tname); 521 522 fh_copy(&resp->ffh, &argp->ffh); 523 fh_copy(&resp->tfh, &argp->tfh); 524 resp->status = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen, 525 &resp->tfh, argp->tname, argp->tlen); 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 dprintk("nfsd: LINK(3) %s ->\n", 536 SVCFH_fmt(&argp->ffh)); 537 dprintk("nfsd: -> %s %.*s\n", 538 SVCFH_fmt(&argp->tfh), 539 argp->tlen, 540 argp->tname); 541 542 fh_copy(&resp->fh, &argp->ffh); 543 fh_copy(&resp->tfh, &argp->tfh); 544 resp->status = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen, 545 &resp->fh); 546 return rpc_success; 547 } 548 549 static void nfsd3_init_dirlist_pages(struct svc_rqst *rqstp, 550 struct nfsd3_readdirres *resp, 551 u32 count) 552 { 553 struct xdr_buf *buf = &resp->dirlist; 554 struct xdr_stream *xdr = &resp->xdr; 555 unsigned int sendbuf = min_t(unsigned int, rqstp->rq_res.buflen, 556 svc_max_payload(rqstp)); 557 558 memset(buf, 0, sizeof(*buf)); 559 560 /* Reserve room for the NULL ptr & eof flag (-2 words) */ 561 buf->buflen = clamp(count, (u32)(XDR_UNIT * 2), sendbuf); 562 buf->buflen -= XDR_UNIT * 2; 563 buf->pages = rqstp->rq_next_page; 564 rqstp->rq_next_page += (buf->buflen + PAGE_SIZE - 1) >> PAGE_SHIFT; 565 566 xdr_init_encode_pages(xdr, buf, buf->pages, NULL); 567 } 568 569 /* 570 * Read a portion of a directory. 571 */ 572 static __be32 573 nfsd3_proc_readdir(struct svc_rqst *rqstp) 574 { 575 struct nfsd3_readdirargs *argp = rqstp->rq_argp; 576 struct nfsd3_readdirres *resp = rqstp->rq_resp; 577 loff_t offset; 578 579 dprintk("nfsd: READDIR(3) %s %d bytes at %d\n", 580 SVCFH_fmt(&argp->fh), 581 argp->count, (u32) argp->cookie); 582 583 nfsd3_init_dirlist_pages(rqstp, resp, argp->count); 584 585 fh_copy(&resp->fh, &argp->fh); 586 resp->common.err = nfs_ok; 587 resp->cookie_offset = 0; 588 resp->rqstp = rqstp; 589 offset = argp->cookie; 590 resp->status = nfsd_readdir(rqstp, &resp->fh, &offset, 591 &resp->common, nfs3svc_encode_entry3); 592 memcpy(resp->verf, argp->verf, 8); 593 nfs3svc_encode_cookie3(resp, offset); 594 595 /* Recycle only pages that were part of the reply */ 596 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 597 598 return rpc_success; 599 } 600 601 /* 602 * Read a portion of a directory, including file handles and attrs. 603 * For now, we choose to ignore the dircount parameter. 604 */ 605 static __be32 606 nfsd3_proc_readdirplus(struct svc_rqst *rqstp) 607 { 608 struct nfsd3_readdirargs *argp = rqstp->rq_argp; 609 struct nfsd3_readdirres *resp = rqstp->rq_resp; 610 loff_t offset; 611 612 dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n", 613 SVCFH_fmt(&argp->fh), 614 argp->count, (u32) argp->cookie); 615 616 nfsd3_init_dirlist_pages(rqstp, resp, argp->count); 617 618 fh_copy(&resp->fh, &argp->fh); 619 resp->common.err = nfs_ok; 620 resp->cookie_offset = 0; 621 resp->rqstp = rqstp; 622 offset = argp->cookie; 623 624 resp->status = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP); 625 if (resp->status != nfs_ok) 626 goto out; 627 628 if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS) { 629 resp->status = nfserr_notsupp; 630 goto out; 631 } 632 633 resp->status = nfsd_readdir(rqstp, &resp->fh, &offset, 634 &resp->common, nfs3svc_encode_entryplus3); 635 memcpy(resp->verf, argp->verf, 8); 636 nfs3svc_encode_cookie3(resp, offset); 637 638 /* Recycle only pages that were part of the reply */ 639 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 640 641 out: 642 return rpc_success; 643 } 644 645 /* 646 * Get file system stats 647 */ 648 static __be32 649 nfsd3_proc_fsstat(struct svc_rqst *rqstp) 650 { 651 struct nfsd_fhandle *argp = rqstp->rq_argp; 652 struct nfsd3_fsstatres *resp = rqstp->rq_resp; 653 654 dprintk("nfsd: FSSTAT(3) %s\n", 655 SVCFH_fmt(&argp->fh)); 656 657 resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0); 658 fh_put(&argp->fh); 659 return rpc_success; 660 } 661 662 /* 663 * Get file system info 664 */ 665 static __be32 666 nfsd3_proc_fsinfo(struct svc_rqst *rqstp) 667 { 668 struct nfsd_fhandle *argp = rqstp->rq_argp; 669 struct nfsd3_fsinfores *resp = rqstp->rq_resp; 670 u32 max_blocksize = svc_max_payload(rqstp); 671 672 dprintk("nfsd: FSINFO(3) %s\n", 673 SVCFH_fmt(&argp->fh)); 674 675 resp->f_rtmax = max_blocksize; 676 resp->f_rtpref = max_blocksize; 677 resp->f_rtmult = PAGE_SIZE; 678 resp->f_wtmax = max_blocksize; 679 resp->f_wtpref = max_blocksize; 680 resp->f_wtmult = PAGE_SIZE; 681 resp->f_dtpref = max_blocksize; 682 resp->f_maxfilesize = ~(u32) 0; 683 resp->f_properties = NFS3_FSF_DEFAULT; 684 685 resp->status = fh_verify(rqstp, &argp->fh, 0, 686 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); 687 688 /* Check special features of the file system. May request 689 * different read/write sizes for file systems known to have 690 * problems with large blocks */ 691 if (resp->status == nfs_ok) { 692 struct super_block *sb = argp->fh.fh_dentry->d_sb; 693 694 /* Note that we don't care for remote fs's here */ 695 if (sb->s_magic == MSDOS_SUPER_MAGIC) { 696 resp->f_properties = NFS3_FSF_BILLYBOY; 697 } 698 resp->f_maxfilesize = sb->s_maxbytes; 699 } 700 701 fh_put(&argp->fh); 702 return rpc_success; 703 } 704 705 /* 706 * Get pathconf info for the specified file 707 */ 708 static __be32 709 nfsd3_proc_pathconf(struct svc_rqst *rqstp) 710 { 711 struct nfsd_fhandle *argp = rqstp->rq_argp; 712 struct nfsd3_pathconfres *resp = rqstp->rq_resp; 713 714 dprintk("nfsd: PATHCONF(3) %s\n", 715 SVCFH_fmt(&argp->fh)); 716 717 /* Set default pathconf */ 718 resp->p_link_max = 255; /* at least */ 719 resp->p_name_max = 255; /* at least */ 720 resp->p_no_trunc = 0; 721 resp->p_chown_restricted = 1; 722 resp->p_case_insensitive = 0; 723 resp->p_case_preserving = 1; 724 725 resp->status = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP); 726 727 if (resp->status == nfs_ok) { 728 struct super_block *sb = argp->fh.fh_dentry->d_sb; 729 730 /* Note that we don't care for remote fs's here */ 731 switch (sb->s_magic) { 732 case EXT2_SUPER_MAGIC: 733 resp->p_link_max = EXT2_LINK_MAX; 734 resp->p_name_max = EXT2_NAME_LEN; 735 break; 736 case MSDOS_SUPER_MAGIC: 737 resp->p_case_insensitive = 1; 738 resp->p_case_preserving = 0; 739 break; 740 } 741 } 742 743 fh_put(&argp->fh); 744 return rpc_success; 745 } 746 747 /* 748 * Commit a file (range) to stable storage. 749 */ 750 static __be32 751 nfsd3_proc_commit(struct svc_rqst *rqstp) 752 { 753 struct nfsd3_commitargs *argp = rqstp->rq_argp; 754 struct nfsd3_commitres *resp = rqstp->rq_resp; 755 struct nfsd_file *nf; 756 757 dprintk("nfsd: COMMIT(3) %s %u@%Lu\n", 758 SVCFH_fmt(&argp->fh), 759 argp->count, 760 (unsigned long long) argp->offset); 761 762 fh_copy(&resp->fh, &argp->fh); 763 resp->status = nfsd_file_acquire_gc(rqstp, &resp->fh, NFSD_MAY_WRITE | 764 NFSD_MAY_NOT_BREAK_LEASE, &nf); 765 if (resp->status) 766 goto out; 767 resp->status = nfsd_commit(rqstp, &resp->fh, nf, argp->offset, 768 argp->count, resp->verf); 769 nfsd_file_put(nf); 770 out: 771 return rpc_success; 772 } 773 774 775 /* 776 * NFSv3 Server procedures. 777 * Only the results of non-idempotent operations are cached. 778 */ 779 #define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat 780 #define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat 781 #define nfsd3_mkdirargs nfsd3_createargs 782 #define nfsd3_readdirplusargs nfsd3_readdirargs 783 #define nfsd3_fhandleargs nfsd_fhandle 784 #define nfsd3_attrstatres nfsd3_attrstat 785 #define nfsd3_wccstatres nfsd3_attrstat 786 #define nfsd3_createres nfsd3_diropres 787 788 #define ST 1 /* status*/ 789 #define FH 17 /* filehandle with length */ 790 #define AT 21 /* attributes */ 791 #define pAT (1+AT) /* post attributes - conditional */ 792 #define WC (7+pAT) /* WCC attributes */ 793 794 static const struct svc_procedure nfsd_procedures3[22] = { 795 [NFS3PROC_NULL] = { 796 .pc_func = nfsd3_proc_null, 797 .pc_decode = nfssvc_decode_voidarg, 798 .pc_encode = nfssvc_encode_voidres, 799 .pc_argsize = sizeof(struct nfsd_voidargs), 800 .pc_argzero = sizeof(struct nfsd_voidargs), 801 .pc_ressize = sizeof(struct nfsd_voidres), 802 .pc_cachetype = RC_NOCACHE, 803 .pc_xdrressize = ST, 804 .pc_name = "NULL", 805 }, 806 [NFS3PROC_GETATTR] = { 807 .pc_func = nfsd3_proc_getattr, 808 .pc_decode = nfs3svc_decode_fhandleargs, 809 .pc_encode = nfs3svc_encode_getattrres, 810 .pc_release = nfs3svc_release_fhandle, 811 .pc_argsize = sizeof(struct nfsd_fhandle), 812 .pc_argzero = sizeof(struct nfsd_fhandle), 813 .pc_ressize = sizeof(struct nfsd3_attrstatres), 814 .pc_cachetype = RC_NOCACHE, 815 .pc_xdrressize = ST+AT, 816 .pc_name = "GETATTR", 817 }, 818 [NFS3PROC_SETATTR] = { 819 .pc_func = nfsd3_proc_setattr, 820 .pc_decode = nfs3svc_decode_sattrargs, 821 .pc_encode = nfs3svc_encode_wccstatres, 822 .pc_release = nfs3svc_release_fhandle, 823 .pc_argsize = sizeof(struct nfsd3_sattrargs), 824 .pc_argzero = sizeof(struct nfsd3_sattrargs), 825 .pc_ressize = sizeof(struct nfsd3_wccstatres), 826 .pc_cachetype = RC_REPLBUFF, 827 .pc_xdrressize = ST+WC, 828 .pc_name = "SETATTR", 829 }, 830 [NFS3PROC_LOOKUP] = { 831 .pc_func = nfsd3_proc_lookup, 832 .pc_decode = nfs3svc_decode_diropargs, 833 .pc_encode = nfs3svc_encode_lookupres, 834 .pc_release = nfs3svc_release_fhandle2, 835 .pc_argsize = sizeof(struct nfsd3_diropargs), 836 .pc_argzero = sizeof(struct nfsd3_diropargs), 837 .pc_ressize = sizeof(struct nfsd3_diropres), 838 .pc_cachetype = RC_NOCACHE, 839 .pc_xdrressize = ST+FH+pAT+pAT, 840 .pc_name = "LOOKUP", 841 }, 842 [NFS3PROC_ACCESS] = { 843 .pc_func = nfsd3_proc_access, 844 .pc_decode = nfs3svc_decode_accessargs, 845 .pc_encode = nfs3svc_encode_accessres, 846 .pc_release = nfs3svc_release_fhandle, 847 .pc_argsize = sizeof(struct nfsd3_accessargs), 848 .pc_argzero = sizeof(struct nfsd3_accessargs), 849 .pc_ressize = sizeof(struct nfsd3_accessres), 850 .pc_cachetype = RC_NOCACHE, 851 .pc_xdrressize = ST+pAT+1, 852 .pc_name = "ACCESS", 853 }, 854 [NFS3PROC_READLINK] = { 855 .pc_func = nfsd3_proc_readlink, 856 .pc_decode = nfs3svc_decode_fhandleargs, 857 .pc_encode = nfs3svc_encode_readlinkres, 858 .pc_release = nfs3svc_release_fhandle, 859 .pc_argsize = sizeof(struct nfsd_fhandle), 860 .pc_argzero = sizeof(struct nfsd_fhandle), 861 .pc_ressize = sizeof(struct nfsd3_readlinkres), 862 .pc_cachetype = RC_NOCACHE, 863 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4, 864 .pc_name = "READLINK", 865 }, 866 [NFS3PROC_READ] = { 867 .pc_func = nfsd3_proc_read, 868 .pc_decode = nfs3svc_decode_readargs, 869 .pc_encode = nfs3svc_encode_readres, 870 .pc_release = nfs3svc_release_fhandle, 871 .pc_argsize = sizeof(struct nfsd3_readargs), 872 .pc_argzero = sizeof(struct nfsd3_readargs), 873 .pc_ressize = sizeof(struct nfsd3_readres), 874 .pc_cachetype = RC_NOCACHE, 875 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4, 876 .pc_name = "READ", 877 }, 878 [NFS3PROC_WRITE] = { 879 .pc_func = nfsd3_proc_write, 880 .pc_decode = nfs3svc_decode_writeargs, 881 .pc_encode = nfs3svc_encode_writeres, 882 .pc_release = nfs3svc_release_fhandle, 883 .pc_argsize = sizeof(struct nfsd3_writeargs), 884 .pc_argzero = sizeof(struct nfsd3_writeargs), 885 .pc_ressize = sizeof(struct nfsd3_writeres), 886 .pc_cachetype = RC_REPLBUFF, 887 .pc_xdrressize = ST+WC+4, 888 .pc_name = "WRITE", 889 }, 890 [NFS3PROC_CREATE] = { 891 .pc_func = nfsd3_proc_create, 892 .pc_decode = nfs3svc_decode_createargs, 893 .pc_encode = nfs3svc_encode_createres, 894 .pc_release = nfs3svc_release_fhandle2, 895 .pc_argsize = sizeof(struct nfsd3_createargs), 896 .pc_argzero = sizeof(struct nfsd3_createargs), 897 .pc_ressize = sizeof(struct nfsd3_createres), 898 .pc_cachetype = RC_REPLBUFF, 899 .pc_xdrressize = ST+(1+FH+pAT)+WC, 900 .pc_name = "CREATE", 901 }, 902 [NFS3PROC_MKDIR] = { 903 .pc_func = nfsd3_proc_mkdir, 904 .pc_decode = nfs3svc_decode_mkdirargs, 905 .pc_encode = nfs3svc_encode_createres, 906 .pc_release = nfs3svc_release_fhandle2, 907 .pc_argsize = sizeof(struct nfsd3_mkdirargs), 908 .pc_argzero = sizeof(struct nfsd3_mkdirargs), 909 .pc_ressize = sizeof(struct nfsd3_createres), 910 .pc_cachetype = RC_REPLBUFF, 911 .pc_xdrressize = ST+(1+FH+pAT)+WC, 912 .pc_name = "MKDIR", 913 }, 914 [NFS3PROC_SYMLINK] = { 915 .pc_func = nfsd3_proc_symlink, 916 .pc_decode = nfs3svc_decode_symlinkargs, 917 .pc_encode = nfs3svc_encode_createres, 918 .pc_release = nfs3svc_release_fhandle2, 919 .pc_argsize = sizeof(struct nfsd3_symlinkargs), 920 .pc_argzero = sizeof(struct nfsd3_symlinkargs), 921 .pc_ressize = sizeof(struct nfsd3_createres), 922 .pc_cachetype = RC_REPLBUFF, 923 .pc_xdrressize = ST+(1+FH+pAT)+WC, 924 .pc_name = "SYMLINK", 925 }, 926 [NFS3PROC_MKNOD] = { 927 .pc_func = nfsd3_proc_mknod, 928 .pc_decode = nfs3svc_decode_mknodargs, 929 .pc_encode = nfs3svc_encode_createres, 930 .pc_release = nfs3svc_release_fhandle2, 931 .pc_argsize = sizeof(struct nfsd3_mknodargs), 932 .pc_argzero = sizeof(struct nfsd3_mknodargs), 933 .pc_ressize = sizeof(struct nfsd3_createres), 934 .pc_cachetype = RC_REPLBUFF, 935 .pc_xdrressize = ST+(1+FH+pAT)+WC, 936 .pc_name = "MKNOD", 937 }, 938 [NFS3PROC_REMOVE] = { 939 .pc_func = nfsd3_proc_remove, 940 .pc_decode = nfs3svc_decode_diropargs, 941 .pc_encode = nfs3svc_encode_wccstatres, 942 .pc_release = nfs3svc_release_fhandle, 943 .pc_argsize = sizeof(struct nfsd3_diropargs), 944 .pc_argzero = sizeof(struct nfsd3_diropargs), 945 .pc_ressize = sizeof(struct nfsd3_wccstatres), 946 .pc_cachetype = RC_REPLBUFF, 947 .pc_xdrressize = ST+WC, 948 .pc_name = "REMOVE", 949 }, 950 [NFS3PROC_RMDIR] = { 951 .pc_func = nfsd3_proc_rmdir, 952 .pc_decode = nfs3svc_decode_diropargs, 953 .pc_encode = nfs3svc_encode_wccstatres, 954 .pc_release = nfs3svc_release_fhandle, 955 .pc_argsize = sizeof(struct nfsd3_diropargs), 956 .pc_argzero = sizeof(struct nfsd3_diropargs), 957 .pc_ressize = sizeof(struct nfsd3_wccstatres), 958 .pc_cachetype = RC_REPLBUFF, 959 .pc_xdrressize = ST+WC, 960 .pc_name = "RMDIR", 961 }, 962 [NFS3PROC_RENAME] = { 963 .pc_func = nfsd3_proc_rename, 964 .pc_decode = nfs3svc_decode_renameargs, 965 .pc_encode = nfs3svc_encode_renameres, 966 .pc_release = nfs3svc_release_fhandle2, 967 .pc_argsize = sizeof(struct nfsd3_renameargs), 968 .pc_argzero = sizeof(struct nfsd3_renameargs), 969 .pc_ressize = sizeof(struct nfsd3_renameres), 970 .pc_cachetype = RC_REPLBUFF, 971 .pc_xdrressize = ST+WC+WC, 972 .pc_name = "RENAME", 973 }, 974 [NFS3PROC_LINK] = { 975 .pc_func = nfsd3_proc_link, 976 .pc_decode = nfs3svc_decode_linkargs, 977 .pc_encode = nfs3svc_encode_linkres, 978 .pc_release = nfs3svc_release_fhandle2, 979 .pc_argsize = sizeof(struct nfsd3_linkargs), 980 .pc_argzero = sizeof(struct nfsd3_linkargs), 981 .pc_ressize = sizeof(struct nfsd3_linkres), 982 .pc_cachetype = RC_REPLBUFF, 983 .pc_xdrressize = ST+pAT+WC, 984 .pc_name = "LINK", 985 }, 986 [NFS3PROC_READDIR] = { 987 .pc_func = nfsd3_proc_readdir, 988 .pc_decode = nfs3svc_decode_readdirargs, 989 .pc_encode = nfs3svc_encode_readdirres, 990 .pc_release = nfs3svc_release_fhandle, 991 .pc_argsize = sizeof(struct nfsd3_readdirargs), 992 .pc_argzero = sizeof(struct nfsd3_readdirargs), 993 .pc_ressize = sizeof(struct nfsd3_readdirres), 994 .pc_cachetype = RC_NOCACHE, 995 .pc_name = "READDIR", 996 }, 997 [NFS3PROC_READDIRPLUS] = { 998 .pc_func = nfsd3_proc_readdirplus, 999 .pc_decode = nfs3svc_decode_readdirplusargs, 1000 .pc_encode = nfs3svc_encode_readdirres, 1001 .pc_release = nfs3svc_release_fhandle, 1002 .pc_argsize = sizeof(struct nfsd3_readdirplusargs), 1003 .pc_argzero = sizeof(struct nfsd3_readdirplusargs), 1004 .pc_ressize = sizeof(struct nfsd3_readdirres), 1005 .pc_cachetype = RC_NOCACHE, 1006 .pc_name = "READDIRPLUS", 1007 }, 1008 [NFS3PROC_FSSTAT] = { 1009 .pc_func = nfsd3_proc_fsstat, 1010 .pc_decode = nfs3svc_decode_fhandleargs, 1011 .pc_encode = nfs3svc_encode_fsstatres, 1012 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 1013 .pc_argzero = sizeof(struct nfsd3_fhandleargs), 1014 .pc_ressize = sizeof(struct nfsd3_fsstatres), 1015 .pc_cachetype = RC_NOCACHE, 1016 .pc_xdrressize = ST+pAT+2*6+1, 1017 .pc_name = "FSSTAT", 1018 }, 1019 [NFS3PROC_FSINFO] = { 1020 .pc_func = nfsd3_proc_fsinfo, 1021 .pc_decode = nfs3svc_decode_fhandleargs, 1022 .pc_encode = nfs3svc_encode_fsinfores, 1023 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 1024 .pc_argzero = sizeof(struct nfsd3_fhandleargs), 1025 .pc_ressize = sizeof(struct nfsd3_fsinfores), 1026 .pc_cachetype = RC_NOCACHE, 1027 .pc_xdrressize = ST+pAT+12, 1028 .pc_name = "FSINFO", 1029 }, 1030 [NFS3PROC_PATHCONF] = { 1031 .pc_func = nfsd3_proc_pathconf, 1032 .pc_decode = nfs3svc_decode_fhandleargs, 1033 .pc_encode = nfs3svc_encode_pathconfres, 1034 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 1035 .pc_argzero = sizeof(struct nfsd3_fhandleargs), 1036 .pc_ressize = sizeof(struct nfsd3_pathconfres), 1037 .pc_cachetype = RC_NOCACHE, 1038 .pc_xdrressize = ST+pAT+6, 1039 .pc_name = "PATHCONF", 1040 }, 1041 [NFS3PROC_COMMIT] = { 1042 .pc_func = nfsd3_proc_commit, 1043 .pc_decode = nfs3svc_decode_commitargs, 1044 .pc_encode = nfs3svc_encode_commitres, 1045 .pc_release = nfs3svc_release_fhandle, 1046 .pc_argsize = sizeof(struct nfsd3_commitargs), 1047 .pc_argzero = sizeof(struct nfsd3_commitargs), 1048 .pc_ressize = sizeof(struct nfsd3_commitres), 1049 .pc_cachetype = RC_NOCACHE, 1050 .pc_xdrressize = ST+WC+2, 1051 .pc_name = "COMMIT", 1052 }, 1053 }; 1054 1055 static DEFINE_PER_CPU_ALIGNED(unsigned long, 1056 nfsd_count3[ARRAY_SIZE(nfsd_procedures3)]); 1057 const struct svc_version nfsd_version3 = { 1058 .vs_vers = 3, 1059 .vs_nproc = ARRAY_SIZE(nfsd_procedures3), 1060 .vs_proc = nfsd_procedures3, 1061 .vs_dispatch = nfsd_dispatch, 1062 .vs_count = nfsd_count3, 1063 .vs_xdrsize = NFS3_SVC_XDRSIZE, 1064 }; 1065