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 #include "iostat.h" 23 #include "internal.h" 24 25 #define NFSDBG_FACILITY NFSDBG_PROC 26 27 /* A wrapper to handle the EJUKEBOX error message */ 28 static int 29 nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) 30 { 31 sigset_t oldset; 32 int res; 33 rpc_clnt_sigmask(clnt, &oldset); 34 do { 35 res = rpc_call_sync(clnt, msg, flags); 36 if (res != -EJUKEBOX) 37 break; 38 schedule_timeout_interruptible(NFS_JUKEBOX_RETRY_TIME); 39 res = -ERESTARTSYS; 40 } while (!signalled()); 41 rpc_clnt_sigunmask(clnt, &oldset); 42 return res; 43 } 44 45 #define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags) 46 47 static int 48 nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode) 49 { 50 if (task->tk_status != -EJUKEBOX) 51 return 0; 52 nfs_inc_stats(inode, NFSIOS_DELAY); 53 task->tk_status = 0; 54 rpc_restart_call(task); 55 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); 56 return 1; 57 } 58 59 static int 60 do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle, 61 struct nfs_fsinfo *info) 62 { 63 struct rpc_message msg = { 64 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO], 65 .rpc_argp = fhandle, 66 .rpc_resp = info, 67 }; 68 int status; 69 70 dprintk("%s: call fsinfo\n", __FUNCTION__); 71 nfs_fattr_init(info->fattr); 72 status = rpc_call_sync(client, &msg, 0); 73 dprintk("%s: reply fsinfo: %d\n", __FUNCTION__, status); 74 if (!(info->fattr->valid & NFS_ATTR_FATTR)) { 75 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR]; 76 msg.rpc_resp = info->fattr; 77 status = rpc_call_sync(client, &msg, 0); 78 dprintk("%s: reply getattr: %d\n", __FUNCTION__, status); 79 } 80 return status; 81 } 82 83 /* 84 * Bare-bones access to getattr: this is for nfs_read_super. 85 */ 86 static int 87 nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, 88 struct nfs_fsinfo *info) 89 { 90 int status; 91 92 status = do_proc_get_root(server->client, fhandle, info); 93 if (status && server->client_sys != server->client) 94 status = do_proc_get_root(server->client_sys, fhandle, info); 95 return status; 96 } 97 98 /* 99 * One function for each procedure in the NFS protocol. 100 */ 101 static int 102 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 103 struct nfs_fattr *fattr) 104 { 105 struct rpc_message msg = { 106 .rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR], 107 .rpc_argp = fhandle, 108 .rpc_resp = fattr, 109 }; 110 int status; 111 112 dprintk("NFS call getattr\n"); 113 nfs_fattr_init(fattr); 114 status = rpc_call_sync(server->client, &msg, 0); 115 dprintk("NFS reply getattr: %d\n", status); 116 return status; 117 } 118 119 static int 120 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 121 struct iattr *sattr) 122 { 123 struct inode *inode = dentry->d_inode; 124 struct nfs3_sattrargs arg = { 125 .fh = NFS_FH(inode), 126 .sattr = sattr, 127 }; 128 struct rpc_message msg = { 129 .rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR], 130 .rpc_argp = &arg, 131 .rpc_resp = fattr, 132 }; 133 int status; 134 135 dprintk("NFS call setattr\n"); 136 nfs_fattr_init(fattr); 137 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 138 if (status == 0) 139 nfs_setattr_update_inode(inode, sattr); 140 dprintk("NFS reply setattr: %d\n", status); 141 return status; 142 } 143 144 static int 145 nfs3_proc_lookup(struct inode *dir, struct qstr *name, 146 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 147 { 148 struct nfs_fattr dir_attr; 149 struct nfs3_diropargs arg = { 150 .fh = NFS_FH(dir), 151 .name = name->name, 152 .len = name->len 153 }; 154 struct nfs3_diropres res = { 155 .dir_attr = &dir_attr, 156 .fh = fhandle, 157 .fattr = fattr 158 }; 159 struct rpc_message msg = { 160 .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP], 161 .rpc_argp = &arg, 162 .rpc_resp = &res, 163 }; 164 int status; 165 166 dprintk("NFS call lookup %s\n", name->name); 167 nfs_fattr_init(&dir_attr); 168 nfs_fattr_init(fattr); 169 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 170 if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) { 171 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR]; 172 msg.rpc_argp = fhandle; 173 msg.rpc_resp = fattr; 174 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 175 } 176 dprintk("NFS reply lookup: %d\n", status); 177 if (status >= 0) 178 status = nfs_refresh_inode(dir, &dir_attr); 179 return status; 180 } 181 182 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry) 183 { 184 struct nfs_fattr fattr; 185 struct nfs3_accessargs arg = { 186 .fh = NFS_FH(inode), 187 }; 188 struct nfs3_accessres res = { 189 .fattr = &fattr, 190 }; 191 struct rpc_message msg = { 192 .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS], 193 .rpc_argp = &arg, 194 .rpc_resp = &res, 195 .rpc_cred = entry->cred, 196 }; 197 int mode = entry->mask; 198 int status; 199 200 dprintk("NFS call access\n"); 201 202 if (mode & MAY_READ) 203 arg.access |= NFS3_ACCESS_READ; 204 if (S_ISDIR(inode->i_mode)) { 205 if (mode & MAY_WRITE) 206 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE; 207 if (mode & MAY_EXEC) 208 arg.access |= NFS3_ACCESS_LOOKUP; 209 } else { 210 if (mode & MAY_WRITE) 211 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND; 212 if (mode & MAY_EXEC) 213 arg.access |= NFS3_ACCESS_EXECUTE; 214 } 215 nfs_fattr_init(&fattr); 216 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 217 nfs_refresh_inode(inode, &fattr); 218 if (status == 0) { 219 entry->mask = 0; 220 if (res.access & NFS3_ACCESS_READ) 221 entry->mask |= MAY_READ; 222 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE)) 223 entry->mask |= MAY_WRITE; 224 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE)) 225 entry->mask |= MAY_EXEC; 226 } 227 dprintk("NFS reply access: %d\n", status); 228 return status; 229 } 230 231 static int nfs3_proc_readlink(struct inode *inode, struct page *page, 232 unsigned int pgbase, unsigned int pglen) 233 { 234 struct nfs_fattr fattr; 235 struct nfs3_readlinkargs args = { 236 .fh = NFS_FH(inode), 237 .pgbase = pgbase, 238 .pglen = pglen, 239 .pages = &page 240 }; 241 struct rpc_message msg = { 242 .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK], 243 .rpc_argp = &args, 244 .rpc_resp = &fattr, 245 }; 246 int status; 247 248 dprintk("NFS call readlink\n"); 249 nfs_fattr_init(&fattr); 250 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 251 nfs_refresh_inode(inode, &fattr); 252 dprintk("NFS reply readlink: %d\n", status); 253 return status; 254 } 255 256 static int nfs3_proc_read(struct nfs_read_data *rdata) 257 { 258 int flags = rdata->flags; 259 struct inode * inode = rdata->inode; 260 struct nfs_fattr * fattr = rdata->res.fattr; 261 struct rpc_message msg = { 262 .rpc_proc = &nfs3_procedures[NFS3PROC_READ], 263 .rpc_argp = &rdata->args, 264 .rpc_resp = &rdata->res, 265 .rpc_cred = rdata->cred, 266 }; 267 int status; 268 269 dprintk("NFS call read %d @ %Ld\n", rdata->args.count, 270 (long long) rdata->args.offset); 271 nfs_fattr_init(fattr); 272 status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); 273 if (status >= 0) 274 nfs_refresh_inode(inode, fattr); 275 dprintk("NFS reply read: %d\n", status); 276 return status; 277 } 278 279 static int nfs3_proc_write(struct nfs_write_data *wdata) 280 { 281 int rpcflags = wdata->flags; 282 struct inode * inode = wdata->inode; 283 struct nfs_fattr * fattr = wdata->res.fattr; 284 struct rpc_message msg = { 285 .rpc_proc = &nfs3_procedures[NFS3PROC_WRITE], 286 .rpc_argp = &wdata->args, 287 .rpc_resp = &wdata->res, 288 .rpc_cred = wdata->cred, 289 }; 290 int status; 291 292 dprintk("NFS call write %d @ %Ld\n", wdata->args.count, 293 (long long) wdata->args.offset); 294 nfs_fattr_init(fattr); 295 status = rpc_call_sync(NFS_CLIENT(inode), &msg, rpcflags); 296 if (status >= 0) 297 nfs_post_op_update_inode(inode, fattr); 298 dprintk("NFS reply write: %d\n", status); 299 return status < 0? status : wdata->res.count; 300 } 301 302 static int nfs3_proc_commit(struct nfs_write_data *cdata) 303 { 304 struct inode * inode = cdata->inode; 305 struct nfs_fattr * fattr = cdata->res.fattr; 306 struct rpc_message msg = { 307 .rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT], 308 .rpc_argp = &cdata->args, 309 .rpc_resp = &cdata->res, 310 .rpc_cred = cdata->cred, 311 }; 312 int status; 313 314 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count, 315 (long long) cdata->args.offset); 316 nfs_fattr_init(fattr); 317 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 318 if (status >= 0) 319 nfs_post_op_update_inode(inode, fattr); 320 dprintk("NFS reply commit: %d\n", status); 321 return status; 322 } 323 324 /* 325 * Create a regular file. 326 * For now, we don't implement O_EXCL. 327 */ 328 static int 329 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 330 int flags, struct nameidata *nd) 331 { 332 struct nfs_fh fhandle; 333 struct nfs_fattr fattr; 334 struct nfs_fattr dir_attr; 335 struct nfs3_createargs arg = { 336 .fh = NFS_FH(dir), 337 .name = dentry->d_name.name, 338 .len = dentry->d_name.len, 339 .sattr = sattr, 340 }; 341 struct nfs3_diropres res = { 342 .dir_attr = &dir_attr, 343 .fh = &fhandle, 344 .fattr = &fattr 345 }; 346 struct rpc_message msg = { 347 .rpc_proc = &nfs3_procedures[NFS3PROC_CREATE], 348 .rpc_argp = &arg, 349 .rpc_resp = &res, 350 }; 351 mode_t mode = sattr->ia_mode; 352 int status; 353 354 dprintk("NFS call create %s\n", dentry->d_name.name); 355 arg.createmode = NFS3_CREATE_UNCHECKED; 356 if (flags & O_EXCL) { 357 arg.createmode = NFS3_CREATE_EXCLUSIVE; 358 arg.verifier[0] = jiffies; 359 arg.verifier[1] = current->pid; 360 } 361 362 sattr->ia_mode &= ~current->fs->umask; 363 364 again: 365 nfs_fattr_init(&dir_attr); 366 nfs_fattr_init(&fattr); 367 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 368 nfs_refresh_inode(dir, &dir_attr); 369 370 /* If the server doesn't support the exclusive creation semantics, 371 * try again with simple 'guarded' mode. */ 372 if (status == NFSERR_NOTSUPP) { 373 switch (arg.createmode) { 374 case NFS3_CREATE_EXCLUSIVE: 375 arg.createmode = NFS3_CREATE_GUARDED; 376 break; 377 378 case NFS3_CREATE_GUARDED: 379 arg.createmode = NFS3_CREATE_UNCHECKED; 380 break; 381 382 case NFS3_CREATE_UNCHECKED: 383 goto out; 384 } 385 goto again; 386 } 387 388 if (status == 0) 389 status = nfs_instantiate(dentry, &fhandle, &fattr); 390 if (status != 0) 391 goto out; 392 393 /* When we created the file with exclusive semantics, make 394 * sure we set the attributes afterwards. */ 395 if (arg.createmode == NFS3_CREATE_EXCLUSIVE) { 396 dprintk("NFS call setattr (post-create)\n"); 397 398 if (!(sattr->ia_valid & ATTR_ATIME_SET)) 399 sattr->ia_valid |= ATTR_ATIME; 400 if (!(sattr->ia_valid & ATTR_MTIME_SET)) 401 sattr->ia_valid |= ATTR_MTIME; 402 403 /* Note: we could use a guarded setattr here, but I'm 404 * not sure this buys us anything (and I'd have 405 * to revamp the NFSv3 XDR code) */ 406 status = nfs3_proc_setattr(dentry, &fattr, sattr); 407 if (status == 0) 408 nfs_setattr_update_inode(dentry->d_inode, sattr); 409 nfs_refresh_inode(dentry->d_inode, &fattr); 410 dprintk("NFS reply setattr (post-create): %d\n", status); 411 } 412 if (status != 0) 413 goto out; 414 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode); 415 out: 416 dprintk("NFS reply create: %d\n", status); 417 return status; 418 } 419 420 static int 421 nfs3_proc_remove(struct inode *dir, struct qstr *name) 422 { 423 struct nfs_fattr dir_attr; 424 struct nfs3_diropargs arg = { 425 .fh = NFS_FH(dir), 426 .name = name->name, 427 .len = name->len 428 }; 429 struct rpc_message msg = { 430 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE], 431 .rpc_argp = &arg, 432 .rpc_resp = &dir_attr, 433 }; 434 int status; 435 436 dprintk("NFS call remove %s\n", name->name); 437 nfs_fattr_init(&dir_attr); 438 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 439 nfs_post_op_update_inode(dir, &dir_attr); 440 dprintk("NFS reply remove: %d\n", status); 441 return status; 442 } 443 444 static int 445 nfs3_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name) 446 { 447 struct unlinkxdr { 448 struct nfs3_diropargs arg; 449 struct nfs_fattr res; 450 } *ptr; 451 452 ptr = (struct unlinkxdr *)kmalloc(sizeof(*ptr), GFP_KERNEL); 453 if (!ptr) 454 return -ENOMEM; 455 ptr->arg.fh = NFS_FH(dir->d_inode); 456 ptr->arg.name = name->name; 457 ptr->arg.len = name->len; 458 nfs_fattr_init(&ptr->res); 459 msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE]; 460 msg->rpc_argp = &ptr->arg; 461 msg->rpc_resp = &ptr->res; 462 return 0; 463 } 464 465 static int 466 nfs3_proc_unlink_done(struct dentry *dir, struct rpc_task *task) 467 { 468 struct rpc_message *msg = &task->tk_msg; 469 struct nfs_fattr *dir_attr; 470 471 if (nfs3_async_handle_jukebox(task, dir->d_inode)) 472 return 1; 473 if (msg->rpc_argp) { 474 dir_attr = (struct nfs_fattr*)msg->rpc_resp; 475 nfs_post_op_update_inode(dir->d_inode, dir_attr); 476 kfree(msg->rpc_argp); 477 } 478 return 0; 479 } 480 481 static int 482 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name, 483 struct inode *new_dir, struct qstr *new_name) 484 { 485 struct nfs_fattr old_dir_attr, new_dir_attr; 486 struct nfs3_renameargs arg = { 487 .fromfh = NFS_FH(old_dir), 488 .fromname = old_name->name, 489 .fromlen = old_name->len, 490 .tofh = NFS_FH(new_dir), 491 .toname = new_name->name, 492 .tolen = new_name->len 493 }; 494 struct nfs3_renameres res = { 495 .fromattr = &old_dir_attr, 496 .toattr = &new_dir_attr 497 }; 498 struct rpc_message msg = { 499 .rpc_proc = &nfs3_procedures[NFS3PROC_RENAME], 500 .rpc_argp = &arg, 501 .rpc_resp = &res, 502 }; 503 int status; 504 505 dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); 506 nfs_fattr_init(&old_dir_attr); 507 nfs_fattr_init(&new_dir_attr); 508 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); 509 nfs_post_op_update_inode(old_dir, &old_dir_attr); 510 nfs_post_op_update_inode(new_dir, &new_dir_attr); 511 dprintk("NFS reply rename: %d\n", status); 512 return status; 513 } 514 515 static int 516 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 517 { 518 struct nfs_fattr dir_attr, fattr; 519 struct nfs3_linkargs arg = { 520 .fromfh = NFS_FH(inode), 521 .tofh = NFS_FH(dir), 522 .toname = name->name, 523 .tolen = name->len 524 }; 525 struct nfs3_linkres res = { 526 .dir_attr = &dir_attr, 527 .fattr = &fattr 528 }; 529 struct rpc_message msg = { 530 .rpc_proc = &nfs3_procedures[NFS3PROC_LINK], 531 .rpc_argp = &arg, 532 .rpc_resp = &res, 533 }; 534 int status; 535 536 dprintk("NFS call link %s\n", name->name); 537 nfs_fattr_init(&dir_attr); 538 nfs_fattr_init(&fattr); 539 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 540 nfs_post_op_update_inode(dir, &dir_attr); 541 nfs_post_op_update_inode(inode, &fattr); 542 dprintk("NFS reply link: %d\n", status); 543 return status; 544 } 545 546 static int 547 nfs3_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path, 548 struct iattr *sattr, struct nfs_fh *fhandle, 549 struct nfs_fattr *fattr) 550 { 551 struct nfs_fattr dir_attr; 552 struct nfs3_symlinkargs arg = { 553 .fromfh = NFS_FH(dir), 554 .fromname = name->name, 555 .fromlen = name->len, 556 .topath = path->name, 557 .tolen = path->len, 558 .sattr = sattr 559 }; 560 struct nfs3_diropres res = { 561 .dir_attr = &dir_attr, 562 .fh = fhandle, 563 .fattr = fattr 564 }; 565 struct rpc_message msg = { 566 .rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK], 567 .rpc_argp = &arg, 568 .rpc_resp = &res, 569 }; 570 int status; 571 572 if (path->len > NFS3_MAXPATHLEN) 573 return -ENAMETOOLONG; 574 dprintk("NFS call symlink %s -> %s\n", name->name, path->name); 575 nfs_fattr_init(&dir_attr); 576 nfs_fattr_init(fattr); 577 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 578 nfs_post_op_update_inode(dir, &dir_attr); 579 dprintk("NFS reply symlink: %d\n", status); 580 return status; 581 } 582 583 static int 584 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) 585 { 586 struct nfs_fh fhandle; 587 struct nfs_fattr fattr, dir_attr; 588 struct nfs3_mkdirargs arg = { 589 .fh = NFS_FH(dir), 590 .name = dentry->d_name.name, 591 .len = dentry->d_name.len, 592 .sattr = sattr 593 }; 594 struct nfs3_diropres res = { 595 .dir_attr = &dir_attr, 596 .fh = &fhandle, 597 .fattr = &fattr 598 }; 599 struct rpc_message msg = { 600 .rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR], 601 .rpc_argp = &arg, 602 .rpc_resp = &res, 603 }; 604 int mode = sattr->ia_mode; 605 int status; 606 607 dprintk("NFS call mkdir %s\n", dentry->d_name.name); 608 609 sattr->ia_mode &= ~current->fs->umask; 610 611 nfs_fattr_init(&dir_attr); 612 nfs_fattr_init(&fattr); 613 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 614 nfs_post_op_update_inode(dir, &dir_attr); 615 if (status != 0) 616 goto out; 617 status = nfs_instantiate(dentry, &fhandle, &fattr); 618 if (status != 0) 619 goto out; 620 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode); 621 out: 622 dprintk("NFS reply mkdir: %d\n", status); 623 return status; 624 } 625 626 static int 627 nfs3_proc_rmdir(struct inode *dir, struct qstr *name) 628 { 629 struct nfs_fattr dir_attr; 630 struct nfs3_diropargs arg = { 631 .fh = NFS_FH(dir), 632 .name = name->name, 633 .len = name->len 634 }; 635 struct rpc_message msg = { 636 .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR], 637 .rpc_argp = &arg, 638 .rpc_resp = &dir_attr, 639 }; 640 int status; 641 642 dprintk("NFS call rmdir %s\n", name->name); 643 nfs_fattr_init(&dir_attr); 644 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 645 nfs_post_op_update_inode(dir, &dir_attr); 646 dprintk("NFS reply rmdir: %d\n", status); 647 return status; 648 } 649 650 /* 651 * The READDIR implementation is somewhat hackish - we pass the user buffer 652 * to the encode function, which installs it in the receive iovec. 653 * The decode function itself doesn't perform any decoding, it just makes 654 * sure the reply is syntactically correct. 655 * 656 * Also note that this implementation handles both plain readdir and 657 * readdirplus. 658 */ 659 static int 660 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 661 u64 cookie, struct page *page, unsigned int count, int plus) 662 { 663 struct inode *dir = dentry->d_inode; 664 struct nfs_fattr dir_attr; 665 u32 *verf = NFS_COOKIEVERF(dir); 666 struct nfs3_readdirargs arg = { 667 .fh = NFS_FH(dir), 668 .cookie = cookie, 669 .verf = {verf[0], verf[1]}, 670 .plus = plus, 671 .count = count, 672 .pages = &page 673 }; 674 struct nfs3_readdirres res = { 675 .dir_attr = &dir_attr, 676 .verf = verf, 677 .plus = plus 678 }; 679 struct rpc_message msg = { 680 .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR], 681 .rpc_argp = &arg, 682 .rpc_resp = &res, 683 .rpc_cred = cred 684 }; 685 int status; 686 687 lock_kernel(); 688 689 if (plus) 690 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS]; 691 692 dprintk("NFS call readdir%s %d\n", 693 plus? "plus" : "", (unsigned int) cookie); 694 695 nfs_fattr_init(&dir_attr); 696 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 697 nfs_refresh_inode(dir, &dir_attr); 698 dprintk("NFS reply readdir: %d\n", status); 699 unlock_kernel(); 700 return status; 701 } 702 703 static int 704 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 705 dev_t rdev) 706 { 707 struct nfs_fh fh; 708 struct nfs_fattr fattr, dir_attr; 709 struct nfs3_mknodargs arg = { 710 .fh = NFS_FH(dir), 711 .name = dentry->d_name.name, 712 .len = dentry->d_name.len, 713 .sattr = sattr, 714 .rdev = rdev 715 }; 716 struct nfs3_diropres res = { 717 .dir_attr = &dir_attr, 718 .fh = &fh, 719 .fattr = &fattr 720 }; 721 struct rpc_message msg = { 722 .rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD], 723 .rpc_argp = &arg, 724 .rpc_resp = &res, 725 }; 726 mode_t mode = sattr->ia_mode; 727 int status; 728 729 switch (sattr->ia_mode & S_IFMT) { 730 case S_IFBLK: arg.type = NF3BLK; break; 731 case S_IFCHR: arg.type = NF3CHR; break; 732 case S_IFIFO: arg.type = NF3FIFO; break; 733 case S_IFSOCK: arg.type = NF3SOCK; break; 734 default: return -EINVAL; 735 } 736 737 dprintk("NFS call mknod %s %u:%u\n", dentry->d_name.name, 738 MAJOR(rdev), MINOR(rdev)); 739 740 sattr->ia_mode &= ~current->fs->umask; 741 742 nfs_fattr_init(&dir_attr); 743 nfs_fattr_init(&fattr); 744 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 745 nfs_post_op_update_inode(dir, &dir_attr); 746 if (status != 0) 747 goto out; 748 status = nfs_instantiate(dentry, &fh, &fattr); 749 if (status != 0) 750 goto out; 751 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode); 752 out: 753 dprintk("NFS reply mknod: %d\n", status); 754 return status; 755 } 756 757 static int 758 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 759 struct nfs_fsstat *stat) 760 { 761 struct rpc_message msg = { 762 .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT], 763 .rpc_argp = fhandle, 764 .rpc_resp = stat, 765 }; 766 int status; 767 768 dprintk("NFS call fsstat\n"); 769 nfs_fattr_init(stat->fattr); 770 status = rpc_call_sync(server->client, &msg, 0); 771 dprintk("NFS reply statfs: %d\n", status); 772 return status; 773 } 774 775 static int 776 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 777 struct nfs_fsinfo *info) 778 { 779 struct rpc_message msg = { 780 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO], 781 .rpc_argp = fhandle, 782 .rpc_resp = info, 783 }; 784 int status; 785 786 dprintk("NFS call fsinfo\n"); 787 nfs_fattr_init(info->fattr); 788 status = rpc_call_sync(server->client_sys, &msg, 0); 789 dprintk("NFS reply fsinfo: %d\n", status); 790 return status; 791 } 792 793 static int 794 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 795 struct nfs_pathconf *info) 796 { 797 struct rpc_message msg = { 798 .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF], 799 .rpc_argp = fhandle, 800 .rpc_resp = info, 801 }; 802 int status; 803 804 dprintk("NFS call pathconf\n"); 805 nfs_fattr_init(info->fattr); 806 status = rpc_call_sync(server->client, &msg, 0); 807 dprintk("NFS reply pathconf: %d\n", status); 808 return status; 809 } 810 811 static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data) 812 { 813 if (nfs3_async_handle_jukebox(task, data->inode)) 814 return -EAGAIN; 815 /* Call back common NFS readpage processing */ 816 if (task->tk_status >= 0) 817 nfs_refresh_inode(data->inode, &data->fattr); 818 return 0; 819 } 820 821 static void nfs3_proc_read_setup(struct nfs_read_data *data) 822 { 823 struct rpc_message msg = { 824 .rpc_proc = &nfs3_procedures[NFS3PROC_READ], 825 .rpc_argp = &data->args, 826 .rpc_resp = &data->res, 827 .rpc_cred = data->cred, 828 }; 829 830 rpc_call_setup(&data->task, &msg, 0); 831 } 832 833 static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data) 834 { 835 if (nfs3_async_handle_jukebox(task, data->inode)) 836 return -EAGAIN; 837 if (task->tk_status >= 0) 838 nfs_post_op_update_inode(data->inode, data->res.fattr); 839 return 0; 840 } 841 842 static void nfs3_proc_write_setup(struct nfs_write_data *data, int how) 843 { 844 struct rpc_message msg = { 845 .rpc_proc = &nfs3_procedures[NFS3PROC_WRITE], 846 .rpc_argp = &data->args, 847 .rpc_resp = &data->res, 848 .rpc_cred = data->cred, 849 }; 850 851 data->args.stable = NFS_UNSTABLE; 852 if (how & FLUSH_STABLE) { 853 data->args.stable = NFS_FILE_SYNC; 854 if (NFS_I(data->inode)->ncommit) 855 data->args.stable = NFS_DATA_SYNC; 856 } 857 858 /* Finalize the task. */ 859 rpc_call_setup(&data->task, &msg, 0); 860 } 861 862 static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data) 863 { 864 if (nfs3_async_handle_jukebox(task, data->inode)) 865 return -EAGAIN; 866 if (task->tk_status >= 0) 867 nfs_post_op_update_inode(data->inode, data->res.fattr); 868 return 0; 869 } 870 871 static void nfs3_proc_commit_setup(struct nfs_write_data *data, int how) 872 { 873 struct rpc_message msg = { 874 .rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT], 875 .rpc_argp = &data->args, 876 .rpc_resp = &data->res, 877 .rpc_cred = data->cred, 878 }; 879 880 rpc_call_setup(&data->task, &msg, 0); 881 } 882 883 static int 884 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl) 885 { 886 return nlmclnt_proc(filp->f_dentry->d_inode, cmd, fl); 887 } 888 889 struct nfs_rpc_ops nfs_v3_clientops = { 890 .version = 3, /* protocol version */ 891 .dentry_ops = &nfs_dentry_operations, 892 .dir_inode_ops = &nfs3_dir_inode_operations, 893 .file_inode_ops = &nfs3_file_inode_operations, 894 .getroot = nfs3_proc_get_root, 895 .getattr = nfs3_proc_getattr, 896 .setattr = nfs3_proc_setattr, 897 .lookup = nfs3_proc_lookup, 898 .access = nfs3_proc_access, 899 .readlink = nfs3_proc_readlink, 900 .read = nfs3_proc_read, 901 .write = nfs3_proc_write, 902 .commit = nfs3_proc_commit, 903 .create = nfs3_proc_create, 904 .remove = nfs3_proc_remove, 905 .unlink_setup = nfs3_proc_unlink_setup, 906 .unlink_done = nfs3_proc_unlink_done, 907 .rename = nfs3_proc_rename, 908 .link = nfs3_proc_link, 909 .symlink = nfs3_proc_symlink, 910 .mkdir = nfs3_proc_mkdir, 911 .rmdir = nfs3_proc_rmdir, 912 .readdir = nfs3_proc_readdir, 913 .mknod = nfs3_proc_mknod, 914 .statfs = nfs3_proc_statfs, 915 .fsinfo = nfs3_proc_fsinfo, 916 .pathconf = nfs3_proc_pathconf, 917 .decode_dirent = nfs3_decode_dirent, 918 .read_setup = nfs3_proc_read_setup, 919 .read_done = nfs3_read_done, 920 .write_setup = nfs3_proc_write_setup, 921 .write_done = nfs3_write_done, 922 .commit_setup = nfs3_proc_commit_setup, 923 .commit_done = nfs3_commit_done, 924 .file_open = nfs_open, 925 .file_release = nfs_release, 926 .lock = nfs3_proc_lock, 927 .clear_acl_cache = nfs3_forget_cached_acls, 928 }; 929