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