1 /* 2 * linux/fs/nfs/nfs3proc.c 3 * 4 * Client-side NFSv3 procedures stubs. 5 * 6 * Copyright (C) 1997, Olaf Kirch 7 */ 8 9 #include <linux/mm.h> 10 #include <linux/utsname.h> 11 #include <linux/errno.h> 12 #include <linux/string.h> 13 #include <linux/sunrpc/clnt.h> 14 #include <linux/nfs.h> 15 #include <linux/nfs3.h> 16 #include <linux/nfs_fs.h> 17 #include <linux/nfs_page.h> 18 #include <linux/lockd/bind.h> 19 #include <linux/smp_lock.h> 20 #include <linux/nfs_mount.h> 21 22 #define NFSDBG_FACILITY NFSDBG_PROC 23 24 extern struct rpc_procinfo nfs3_procedures[]; 25 26 /* A wrapper to handle the EJUKEBOX error message */ 27 static int 28 nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) 29 { 30 sigset_t oldset; 31 int res; 32 rpc_clnt_sigmask(clnt, &oldset); 33 do { 34 res = rpc_call_sync(clnt, msg, flags); 35 if (res != -EJUKEBOX) 36 break; 37 schedule_timeout_interruptible(NFS_JUKEBOX_RETRY_TIME); 38 res = -ERESTARTSYS; 39 } while (!signalled()); 40 rpc_clnt_sigunmask(clnt, &oldset); 41 return res; 42 } 43 44 static inline int 45 nfs3_rpc_call_wrapper(struct rpc_clnt *clnt, u32 proc, void *argp, void *resp, int flags) 46 { 47 struct rpc_message msg = { 48 .rpc_proc = &clnt->cl_procinfo[proc], 49 .rpc_argp = argp, 50 .rpc_resp = resp, 51 }; 52 return nfs3_rpc_wrapper(clnt, &msg, flags); 53 } 54 55 #define rpc_call(clnt, proc, argp, resp, flags) \ 56 nfs3_rpc_call_wrapper(clnt, proc, argp, resp, flags) 57 #define rpc_call_sync(clnt, msg, flags) \ 58 nfs3_rpc_wrapper(clnt, msg, flags) 59 60 static int 61 nfs3_async_handle_jukebox(struct rpc_task *task) 62 { 63 if (task->tk_status != -EJUKEBOX) 64 return 0; 65 task->tk_status = 0; 66 rpc_restart_call(task); 67 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); 68 return 1; 69 } 70 71 static int 72 do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle, 73 struct nfs_fsinfo *info) 74 { 75 int status; 76 77 dprintk("%s: call fsinfo\n", __FUNCTION__); 78 nfs_fattr_init(info->fattr); 79 status = rpc_call(client, NFS3PROC_FSINFO, fhandle, info, 0); 80 dprintk("%s: reply fsinfo: %d\n", __FUNCTION__, status); 81 if (!(info->fattr->valid & NFS_ATTR_FATTR)) { 82 status = rpc_call(client, NFS3PROC_GETATTR, fhandle, info->fattr, 0); 83 dprintk("%s: reply getattr: %d\n", __FUNCTION__, status); 84 } 85 return status; 86 } 87 88 /* 89 * Bare-bones access to getattr: this is for nfs_read_super. 90 */ 91 static int 92 nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, 93 struct nfs_fsinfo *info) 94 { 95 int status; 96 97 status = do_proc_get_root(server->client, fhandle, info); 98 if (status && server->client_sys != server->client) 99 status = do_proc_get_root(server->client_sys, fhandle, info); 100 return status; 101 } 102 103 /* 104 * One function for each procedure in the NFS protocol. 105 */ 106 static int 107 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 108 struct nfs_fattr *fattr) 109 { 110 int status; 111 112 dprintk("NFS call getattr\n"); 113 nfs_fattr_init(fattr); 114 status = rpc_call(server->client, NFS3PROC_GETATTR, 115 fhandle, fattr, 0); 116 dprintk("NFS reply getattr: %d\n", status); 117 return status; 118 } 119 120 static int 121 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 122 struct iattr *sattr) 123 { 124 struct inode *inode = dentry->d_inode; 125 struct nfs3_sattrargs arg = { 126 .fh = NFS_FH(inode), 127 .sattr = sattr, 128 }; 129 int status; 130 131 dprintk("NFS call setattr\n"); 132 nfs_fattr_init(fattr); 133 status = rpc_call(NFS_CLIENT(inode), NFS3PROC_SETATTR, &arg, fattr, 0); 134 if (status == 0) 135 nfs_setattr_update_inode(inode, sattr); 136 dprintk("NFS reply setattr: %d\n", status); 137 return status; 138 } 139 140 static int 141 nfs3_proc_lookup(struct inode *dir, struct qstr *name, 142 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 143 { 144 struct nfs_fattr dir_attr; 145 struct nfs3_diropargs arg = { 146 .fh = NFS_FH(dir), 147 .name = name->name, 148 .len = name->len 149 }; 150 struct nfs3_diropres res = { 151 .dir_attr = &dir_attr, 152 .fh = fhandle, 153 .fattr = fattr 154 }; 155 int status; 156 157 dprintk("NFS call lookup %s\n", name->name); 158 nfs_fattr_init(&dir_attr); 159 nfs_fattr_init(fattr); 160 status = rpc_call(NFS_CLIENT(dir), NFS3PROC_LOOKUP, &arg, &res, 0); 161 if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) 162 status = rpc_call(NFS_CLIENT(dir), NFS3PROC_GETATTR, 163 fhandle, fattr, 0); 164 dprintk("NFS reply lookup: %d\n", status); 165 if (status >= 0) 166 status = nfs_refresh_inode(dir, &dir_attr); 167 return status; 168 } 169 170 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry) 171 { 172 struct nfs_fattr fattr; 173 struct nfs3_accessargs arg = { 174 .fh = NFS_FH(inode), 175 }; 176 struct nfs3_accessres res = { 177 .fattr = &fattr, 178 }; 179 struct rpc_message msg = { 180 .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS], 181 .rpc_argp = &arg, 182 .rpc_resp = &res, 183 .rpc_cred = entry->cred 184 }; 185 int mode = entry->mask; 186 int status; 187 188 dprintk("NFS call access\n"); 189 190 if (mode & MAY_READ) 191 arg.access |= NFS3_ACCESS_READ; 192 if (S_ISDIR(inode->i_mode)) { 193 if (mode & MAY_WRITE) 194 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE; 195 if (mode & MAY_EXEC) 196 arg.access |= NFS3_ACCESS_LOOKUP; 197 } else { 198 if (mode & MAY_WRITE) 199 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND; 200 if (mode & MAY_EXEC) 201 arg.access |= NFS3_ACCESS_EXECUTE; 202 } 203 nfs_fattr_init(&fattr); 204 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 205 nfs_refresh_inode(inode, &fattr); 206 if (status == 0) { 207 entry->mask = 0; 208 if (res.access & NFS3_ACCESS_READ) 209 entry->mask |= MAY_READ; 210 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE)) 211 entry->mask |= MAY_WRITE; 212 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE)) 213 entry->mask |= MAY_EXEC; 214 } 215 dprintk("NFS reply access: %d\n", status); 216 return status; 217 } 218 219 static int nfs3_proc_readlink(struct inode *inode, struct page *page, 220 unsigned int pgbase, unsigned int pglen) 221 { 222 struct nfs_fattr fattr; 223 struct nfs3_readlinkargs args = { 224 .fh = NFS_FH(inode), 225 .pgbase = pgbase, 226 .pglen = pglen, 227 .pages = &page 228 }; 229 int status; 230 231 dprintk("NFS call readlink\n"); 232 nfs_fattr_init(&fattr); 233 status = rpc_call(NFS_CLIENT(inode), NFS3PROC_READLINK, 234 &args, &fattr, 0); 235 nfs_refresh_inode(inode, &fattr); 236 dprintk("NFS reply readlink: %d\n", status); 237 return status; 238 } 239 240 static int nfs3_proc_read(struct nfs_read_data *rdata) 241 { 242 int flags = rdata->flags; 243 struct inode * inode = rdata->inode; 244 struct nfs_fattr * fattr = rdata->res.fattr; 245 struct rpc_message msg = { 246 .rpc_proc = &nfs3_procedures[NFS3PROC_READ], 247 .rpc_argp = &rdata->args, 248 .rpc_resp = &rdata->res, 249 .rpc_cred = rdata->cred, 250 }; 251 int status; 252 253 dprintk("NFS call read %d @ %Ld\n", rdata->args.count, 254 (long long) rdata->args.offset); 255 nfs_fattr_init(fattr); 256 status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); 257 if (status >= 0) 258 nfs_refresh_inode(inode, fattr); 259 dprintk("NFS reply read: %d\n", status); 260 return status; 261 } 262 263 static int nfs3_proc_write(struct nfs_write_data *wdata) 264 { 265 int rpcflags = wdata->flags; 266 struct inode * inode = wdata->inode; 267 struct nfs_fattr * fattr = wdata->res.fattr; 268 struct rpc_message msg = { 269 .rpc_proc = &nfs3_procedures[NFS3PROC_WRITE], 270 .rpc_argp = &wdata->args, 271 .rpc_resp = &wdata->res, 272 .rpc_cred = wdata->cred, 273 }; 274 int status; 275 276 dprintk("NFS call write %d @ %Ld\n", wdata->args.count, 277 (long long) wdata->args.offset); 278 nfs_fattr_init(fattr); 279 status = rpc_call_sync(NFS_CLIENT(inode), &msg, rpcflags); 280 if (status >= 0) 281 nfs_post_op_update_inode(inode, fattr); 282 dprintk("NFS reply write: %d\n", status); 283 return status < 0? status : wdata->res.count; 284 } 285 286 static int nfs3_proc_commit(struct nfs_write_data *cdata) 287 { 288 struct inode * inode = cdata->inode; 289 struct nfs_fattr * fattr = cdata->res.fattr; 290 struct rpc_message msg = { 291 .rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT], 292 .rpc_argp = &cdata->args, 293 .rpc_resp = &cdata->res, 294 .rpc_cred = cdata->cred, 295 }; 296 int status; 297 298 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count, 299 (long long) cdata->args.offset); 300 nfs_fattr_init(fattr); 301 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 302 if (status >= 0) 303 nfs_post_op_update_inode(inode, fattr); 304 dprintk("NFS reply commit: %d\n", status); 305 return status; 306 } 307 308 /* 309 * Create a regular file. 310 * For now, we don't implement O_EXCL. 311 */ 312 static int 313 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 314 int flags, struct nameidata *nd) 315 { 316 struct nfs_fh fhandle; 317 struct nfs_fattr fattr; 318 struct nfs_fattr dir_attr; 319 struct nfs3_createargs arg = { 320 .fh = NFS_FH(dir), 321 .name = dentry->d_name.name, 322 .len = dentry->d_name.len, 323 .sattr = sattr, 324 }; 325 struct nfs3_diropres res = { 326 .dir_attr = &dir_attr, 327 .fh = &fhandle, 328 .fattr = &fattr 329 }; 330 mode_t mode = sattr->ia_mode; 331 int status; 332 333 dprintk("NFS call create %s\n", dentry->d_name.name); 334 arg.createmode = NFS3_CREATE_UNCHECKED; 335 if (flags & O_EXCL) { 336 arg.createmode = NFS3_CREATE_EXCLUSIVE; 337 arg.verifier[0] = jiffies; 338 arg.verifier[1] = current->pid; 339 } 340 341 sattr->ia_mode &= ~current->fs->umask; 342 343 again: 344 nfs_fattr_init(&dir_attr); 345 nfs_fattr_init(&fattr); 346 status = rpc_call(NFS_CLIENT(dir), NFS3PROC_CREATE, &arg, &res, 0); 347 nfs_post_op_update_inode(dir, &dir_attr); 348 349 /* If the server doesn't support the exclusive creation semantics, 350 * try again with simple 'guarded' mode. */ 351 if (status == NFSERR_NOTSUPP) { 352 switch (arg.createmode) { 353 case NFS3_CREATE_EXCLUSIVE: 354 arg.createmode = NFS3_CREATE_GUARDED; 355 break; 356 357 case NFS3_CREATE_GUARDED: 358 arg.createmode = NFS3_CREATE_UNCHECKED; 359 break; 360 361 case NFS3_CREATE_UNCHECKED: 362 goto out; 363 } 364 goto again; 365 } 366 367 if (status == 0) 368 status = nfs_instantiate(dentry, &fhandle, &fattr); 369 if (status != 0) 370 goto out; 371 372 /* When we created the file with exclusive semantics, make 373 * sure we set the attributes afterwards. */ 374 if (arg.createmode == NFS3_CREATE_EXCLUSIVE) { 375 dprintk("NFS call setattr (post-create)\n"); 376 377 if (!(sattr->ia_valid & ATTR_ATIME_SET)) 378 sattr->ia_valid |= ATTR_ATIME; 379 if (!(sattr->ia_valid & ATTR_MTIME_SET)) 380 sattr->ia_valid |= ATTR_MTIME; 381 382 /* Note: we could use a guarded setattr here, but I'm 383 * not sure this buys us anything (and I'd have 384 * to revamp the NFSv3 XDR code) */ 385 status = nfs3_proc_setattr(dentry, &fattr, sattr); 386 if (status == 0) 387 nfs_setattr_update_inode(dentry->d_inode, sattr); 388 nfs_refresh_inode(dentry->d_inode, &fattr); 389 dprintk("NFS reply setattr (post-create): %d\n", status); 390 } 391 if (status != 0) 392 goto out; 393 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode); 394 out: 395 dprintk("NFS reply create: %d\n", status); 396 return status; 397 } 398 399 static int 400 nfs3_proc_remove(struct inode *dir, struct qstr *name) 401 { 402 struct nfs_fattr dir_attr; 403 struct nfs3_diropargs arg = { 404 .fh = NFS_FH(dir), 405 .name = name->name, 406 .len = name->len 407 }; 408 struct rpc_message msg = { 409 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE], 410 .rpc_argp = &arg, 411 .rpc_resp = &dir_attr, 412 }; 413 int status; 414 415 dprintk("NFS call remove %s\n", name->name); 416 nfs_fattr_init(&dir_attr); 417 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 418 nfs_post_op_update_inode(dir, &dir_attr); 419 dprintk("NFS reply remove: %d\n", status); 420 return status; 421 } 422 423 static int 424 nfs3_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name) 425 { 426 struct unlinkxdr { 427 struct nfs3_diropargs arg; 428 struct nfs_fattr res; 429 } *ptr; 430 431 ptr = (struct unlinkxdr *)kmalloc(sizeof(*ptr), GFP_KERNEL); 432 if (!ptr) 433 return -ENOMEM; 434 ptr->arg.fh = NFS_FH(dir->d_inode); 435 ptr->arg.name = name->name; 436 ptr->arg.len = name->len; 437 nfs_fattr_init(&ptr->res); 438 msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE]; 439 msg->rpc_argp = &ptr->arg; 440 msg->rpc_resp = &ptr->res; 441 return 0; 442 } 443 444 static int 445 nfs3_proc_unlink_done(struct dentry *dir, struct rpc_task *task) 446 { 447 struct rpc_message *msg = &task->tk_msg; 448 struct nfs_fattr *dir_attr; 449 450 if (nfs3_async_handle_jukebox(task)) 451 return 1; 452 if (msg->rpc_argp) { 453 dir_attr = (struct nfs_fattr*)msg->rpc_resp; 454 nfs_post_op_update_inode(dir->d_inode, dir_attr); 455 kfree(msg->rpc_argp); 456 } 457 return 0; 458 } 459 460 static int 461 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name, 462 struct inode *new_dir, struct qstr *new_name) 463 { 464 struct nfs_fattr old_dir_attr, new_dir_attr; 465 struct nfs3_renameargs arg = { 466 .fromfh = NFS_FH(old_dir), 467 .fromname = old_name->name, 468 .fromlen = old_name->len, 469 .tofh = NFS_FH(new_dir), 470 .toname = new_name->name, 471 .tolen = new_name->len 472 }; 473 struct nfs3_renameres res = { 474 .fromattr = &old_dir_attr, 475 .toattr = &new_dir_attr 476 }; 477 int status; 478 479 dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); 480 nfs_fattr_init(&old_dir_attr); 481 nfs_fattr_init(&new_dir_attr); 482 status = rpc_call(NFS_CLIENT(old_dir), NFS3PROC_RENAME, &arg, &res, 0); 483 nfs_post_op_update_inode(old_dir, &old_dir_attr); 484 nfs_post_op_update_inode(new_dir, &new_dir_attr); 485 dprintk("NFS reply rename: %d\n", status); 486 return status; 487 } 488 489 static int 490 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 491 { 492 struct nfs_fattr dir_attr, fattr; 493 struct nfs3_linkargs arg = { 494 .fromfh = NFS_FH(inode), 495 .tofh = NFS_FH(dir), 496 .toname = name->name, 497 .tolen = name->len 498 }; 499 struct nfs3_linkres res = { 500 .dir_attr = &dir_attr, 501 .fattr = &fattr 502 }; 503 int status; 504 505 dprintk("NFS call link %s\n", name->name); 506 nfs_fattr_init(&dir_attr); 507 nfs_fattr_init(&fattr); 508 status = rpc_call(NFS_CLIENT(inode), NFS3PROC_LINK, &arg, &res, 0); 509 nfs_post_op_update_inode(dir, &dir_attr); 510 nfs_post_op_update_inode(inode, &fattr); 511 dprintk("NFS reply link: %d\n", status); 512 return status; 513 } 514 515 static int 516 nfs3_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path, 517 struct iattr *sattr, struct nfs_fh *fhandle, 518 struct nfs_fattr *fattr) 519 { 520 struct nfs_fattr dir_attr; 521 struct nfs3_symlinkargs arg = { 522 .fromfh = NFS_FH(dir), 523 .fromname = name->name, 524 .fromlen = name->len, 525 .topath = path->name, 526 .tolen = path->len, 527 .sattr = sattr 528 }; 529 struct nfs3_diropres res = { 530 .dir_attr = &dir_attr, 531 .fh = fhandle, 532 .fattr = fattr 533 }; 534 int status; 535 536 if (path->len > NFS3_MAXPATHLEN) 537 return -ENAMETOOLONG; 538 dprintk("NFS call symlink %s -> %s\n", name->name, path->name); 539 nfs_fattr_init(&dir_attr); 540 nfs_fattr_init(fattr); 541 status = rpc_call(NFS_CLIENT(dir), NFS3PROC_SYMLINK, &arg, &res, 0); 542 nfs_post_op_update_inode(dir, &dir_attr); 543 dprintk("NFS reply symlink: %d\n", status); 544 return status; 545 } 546 547 static int 548 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) 549 { 550 struct nfs_fh fhandle; 551 struct nfs_fattr fattr, dir_attr; 552 struct nfs3_mkdirargs arg = { 553 .fh = NFS_FH(dir), 554 .name = dentry->d_name.name, 555 .len = dentry->d_name.len, 556 .sattr = sattr 557 }; 558 struct nfs3_diropres res = { 559 .dir_attr = &dir_attr, 560 .fh = &fhandle, 561 .fattr = &fattr 562 }; 563 int mode = sattr->ia_mode; 564 int status; 565 566 dprintk("NFS call mkdir %s\n", dentry->d_name.name); 567 568 sattr->ia_mode &= ~current->fs->umask; 569 570 nfs_fattr_init(&dir_attr); 571 nfs_fattr_init(&fattr); 572 status = rpc_call(NFS_CLIENT(dir), NFS3PROC_MKDIR, &arg, &res, 0); 573 nfs_post_op_update_inode(dir, &dir_attr); 574 if (status != 0) 575 goto out; 576 status = nfs_instantiate(dentry, &fhandle, &fattr); 577 if (status != 0) 578 goto out; 579 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode); 580 out: 581 dprintk("NFS reply mkdir: %d\n", status); 582 return status; 583 } 584 585 static int 586 nfs3_proc_rmdir(struct inode *dir, struct qstr *name) 587 { 588 struct nfs_fattr dir_attr; 589 struct nfs3_diropargs arg = { 590 .fh = NFS_FH(dir), 591 .name = name->name, 592 .len = name->len 593 }; 594 int status; 595 596 dprintk("NFS call rmdir %s\n", name->name); 597 nfs_fattr_init(&dir_attr); 598 status = rpc_call(NFS_CLIENT(dir), NFS3PROC_RMDIR, &arg, &dir_attr, 0); 599 nfs_post_op_update_inode(dir, &dir_attr); 600 dprintk("NFS reply rmdir: %d\n", status); 601 return status; 602 } 603 604 /* 605 * The READDIR implementation is somewhat hackish - we pass the user buffer 606 * to the encode function, which installs it in the receive iovec. 607 * The decode function itself doesn't perform any decoding, it just makes 608 * sure the reply is syntactically correct. 609 * 610 * Also note that this implementation handles both plain readdir and 611 * readdirplus. 612 */ 613 static int 614 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 615 u64 cookie, struct page *page, unsigned int count, int plus) 616 { 617 struct inode *dir = dentry->d_inode; 618 struct nfs_fattr dir_attr; 619 u32 *verf = NFS_COOKIEVERF(dir); 620 struct nfs3_readdirargs arg = { 621 .fh = NFS_FH(dir), 622 .cookie = cookie, 623 .verf = {verf[0], verf[1]}, 624 .plus = plus, 625 .count = count, 626 .pages = &page 627 }; 628 struct nfs3_readdirres res = { 629 .dir_attr = &dir_attr, 630 .verf = verf, 631 .plus = plus 632 }; 633 struct rpc_message msg = { 634 .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR], 635 .rpc_argp = &arg, 636 .rpc_resp = &res, 637 .rpc_cred = cred 638 }; 639 int status; 640 641 lock_kernel(); 642 643 if (plus) 644 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS]; 645 646 dprintk("NFS call readdir%s %d\n", 647 plus? "plus" : "", (unsigned int) cookie); 648 649 nfs_fattr_init(&dir_attr); 650 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 651 nfs_refresh_inode(dir, &dir_attr); 652 dprintk("NFS reply readdir: %d\n", status); 653 unlock_kernel(); 654 return status; 655 } 656 657 static int 658 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 659 dev_t rdev) 660 { 661 struct nfs_fh fh; 662 struct nfs_fattr fattr, dir_attr; 663 struct nfs3_mknodargs arg = { 664 .fh = NFS_FH(dir), 665 .name = dentry->d_name.name, 666 .len = dentry->d_name.len, 667 .sattr = sattr, 668 .rdev = rdev 669 }; 670 struct nfs3_diropres res = { 671 .dir_attr = &dir_attr, 672 .fh = &fh, 673 .fattr = &fattr 674 }; 675 mode_t mode = sattr->ia_mode; 676 int status; 677 678 switch (sattr->ia_mode & S_IFMT) { 679 case S_IFBLK: arg.type = NF3BLK; break; 680 case S_IFCHR: arg.type = NF3CHR; break; 681 case S_IFIFO: arg.type = NF3FIFO; break; 682 case S_IFSOCK: arg.type = NF3SOCK; break; 683 default: return -EINVAL; 684 } 685 686 dprintk("NFS call mknod %s %u:%u\n", dentry->d_name.name, 687 MAJOR(rdev), MINOR(rdev)); 688 689 sattr->ia_mode &= ~current->fs->umask; 690 691 nfs_fattr_init(&dir_attr); 692 nfs_fattr_init(&fattr); 693 status = rpc_call(NFS_CLIENT(dir), NFS3PROC_MKNOD, &arg, &res, 0); 694 nfs_post_op_update_inode(dir, &dir_attr); 695 if (status != 0) 696 goto out; 697 status = nfs_instantiate(dentry, &fh, &fattr); 698 if (status != 0) 699 goto out; 700 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode); 701 out: 702 dprintk("NFS reply mknod: %d\n", status); 703 return status; 704 } 705 706 static int 707 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 708 struct nfs_fsstat *stat) 709 { 710 int status; 711 712 dprintk("NFS call fsstat\n"); 713 nfs_fattr_init(stat->fattr); 714 status = rpc_call(server->client, NFS3PROC_FSSTAT, fhandle, stat, 0); 715 dprintk("NFS reply statfs: %d\n", status); 716 return status; 717 } 718 719 static int 720 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 721 struct nfs_fsinfo *info) 722 { 723 int status; 724 725 dprintk("NFS call fsinfo\n"); 726 nfs_fattr_init(info->fattr); 727 status = rpc_call(server->client_sys, NFS3PROC_FSINFO, fhandle, info, 0); 728 dprintk("NFS reply fsinfo: %d\n", status); 729 return status; 730 } 731 732 static int 733 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 734 struct nfs_pathconf *info) 735 { 736 int status; 737 738 dprintk("NFS call pathconf\n"); 739 nfs_fattr_init(info->fattr); 740 status = rpc_call(server->client, NFS3PROC_PATHCONF, fhandle, info, 0); 741 dprintk("NFS reply pathconf: %d\n", status); 742 return status; 743 } 744 745 extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int); 746 747 static void nfs3_read_done(struct rpc_task *task, void *calldata) 748 { 749 struct nfs_read_data *data = calldata; 750 751 if (nfs3_async_handle_jukebox(task)) 752 return; 753 /* Call back common NFS readpage processing */ 754 if (task->tk_status >= 0) 755 nfs_refresh_inode(data->inode, &data->fattr); 756 nfs_readpage_result(task, calldata); 757 } 758 759 static const struct rpc_call_ops nfs3_read_ops = { 760 .rpc_call_done = nfs3_read_done, 761 .rpc_release = nfs_readdata_release, 762 }; 763 764 static void 765 nfs3_proc_read_setup(struct nfs_read_data *data) 766 { 767 struct rpc_task *task = &data->task; 768 struct inode *inode = data->inode; 769 int flags; 770 struct rpc_message msg = { 771 .rpc_proc = &nfs3_procedures[NFS3PROC_READ], 772 .rpc_argp = &data->args, 773 .rpc_resp = &data->res, 774 .rpc_cred = data->cred, 775 }; 776 777 /* N.B. Do we need to test? Never called for swapfile inode */ 778 flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0); 779 780 /* Finalize the task. */ 781 rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs3_read_ops, data); 782 rpc_call_setup(task, &msg, 0); 783 } 784 785 static void nfs3_write_done(struct rpc_task *task, void *calldata) 786 { 787 struct nfs_write_data *data = calldata; 788 789 if (nfs3_async_handle_jukebox(task)) 790 return; 791 if (task->tk_status >= 0) 792 nfs_post_op_update_inode(data->inode, data->res.fattr); 793 nfs_writeback_done(task, calldata); 794 } 795 796 static const struct rpc_call_ops nfs3_write_ops = { 797 .rpc_call_done = nfs3_write_done, 798 .rpc_release = nfs_writedata_release, 799 }; 800 801 static void 802 nfs3_proc_write_setup(struct nfs_write_data *data, int how) 803 { 804 struct rpc_task *task = &data->task; 805 struct inode *inode = data->inode; 806 int stable; 807 int flags; 808 struct rpc_message msg = { 809 .rpc_proc = &nfs3_procedures[NFS3PROC_WRITE], 810 .rpc_argp = &data->args, 811 .rpc_resp = &data->res, 812 .rpc_cred = data->cred, 813 }; 814 815 if (how & FLUSH_STABLE) { 816 if (!NFS_I(inode)->ncommit) 817 stable = NFS_FILE_SYNC; 818 else 819 stable = NFS_DATA_SYNC; 820 } else 821 stable = NFS_UNSTABLE; 822 data->args.stable = stable; 823 824 /* Set the initial flags for the task. */ 825 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; 826 827 /* Finalize the task. */ 828 rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs3_write_ops, data); 829 rpc_call_setup(task, &msg, 0); 830 } 831 832 static void nfs3_commit_done(struct rpc_task *task, void *calldata) 833 { 834 struct nfs_write_data *data = calldata; 835 836 if (nfs3_async_handle_jukebox(task)) 837 return; 838 if (task->tk_status >= 0) 839 nfs_post_op_update_inode(data->inode, data->res.fattr); 840 nfs_commit_done(task, calldata); 841 } 842 843 static const struct rpc_call_ops nfs3_commit_ops = { 844 .rpc_call_done = nfs3_commit_done, 845 .rpc_release = nfs_commit_release, 846 }; 847 848 static void 849 nfs3_proc_commit_setup(struct nfs_write_data *data, int how) 850 { 851 struct rpc_task *task = &data->task; 852 struct inode *inode = data->inode; 853 int flags; 854 struct rpc_message msg = { 855 .rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT], 856 .rpc_argp = &data->args, 857 .rpc_resp = &data->res, 858 .rpc_cred = data->cred, 859 }; 860 861 /* Set the initial flags for the task. */ 862 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; 863 864 /* Finalize the task. */ 865 rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs3_commit_ops, data); 866 rpc_call_setup(task, &msg, 0); 867 } 868 869 static int 870 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl) 871 { 872 return nlmclnt_proc(filp->f_dentry->d_inode, cmd, fl); 873 } 874 875 struct nfs_rpc_ops nfs_v3_clientops = { 876 .version = 3, /* protocol version */ 877 .dentry_ops = &nfs_dentry_operations, 878 .dir_inode_ops = &nfs3_dir_inode_operations, 879 .file_inode_ops = &nfs3_file_inode_operations, 880 .getroot = nfs3_proc_get_root, 881 .getattr = nfs3_proc_getattr, 882 .setattr = nfs3_proc_setattr, 883 .lookup = nfs3_proc_lookup, 884 .access = nfs3_proc_access, 885 .readlink = nfs3_proc_readlink, 886 .read = nfs3_proc_read, 887 .write = nfs3_proc_write, 888 .commit = nfs3_proc_commit, 889 .create = nfs3_proc_create, 890 .remove = nfs3_proc_remove, 891 .unlink_setup = nfs3_proc_unlink_setup, 892 .unlink_done = nfs3_proc_unlink_done, 893 .rename = nfs3_proc_rename, 894 .link = nfs3_proc_link, 895 .symlink = nfs3_proc_symlink, 896 .mkdir = nfs3_proc_mkdir, 897 .rmdir = nfs3_proc_rmdir, 898 .readdir = nfs3_proc_readdir, 899 .mknod = nfs3_proc_mknod, 900 .statfs = nfs3_proc_statfs, 901 .fsinfo = nfs3_proc_fsinfo, 902 .pathconf = nfs3_proc_pathconf, 903 .decode_dirent = nfs3_decode_dirent, 904 .read_setup = nfs3_proc_read_setup, 905 .write_setup = nfs3_proc_write_setup, 906 .commit_setup = nfs3_proc_commit_setup, 907 .file_open = nfs_open, 908 .file_release = nfs_release, 909 .lock = nfs3_proc_lock, 910 .clear_acl_cache = nfs3_forget_cached_acls, 911 }; 912