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/errno.h> 11 #include <linux/string.h> 12 #include <linux/sunrpc/clnt.h> 13 #include <linux/slab.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/nfs_mount.h> 20 21 #include "iostat.h" 22 #include "internal.h" 23 24 #define NFSDBG_FACILITY NFSDBG_PROC 25 26 /* A wrapper to handle the EJUKEBOX and EKEYEXPIRED error messages */ 27 static int 28 nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) 29 { 30 int res; 31 do { 32 res = rpc_call_sync(clnt, msg, flags); 33 if (res != -EJUKEBOX && res != -EKEYEXPIRED) 34 break; 35 schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME); 36 res = -ERESTARTSYS; 37 } while (!fatal_signal_pending(current)); 38 return res; 39 } 40 41 #define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags) 42 43 static int 44 nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode) 45 { 46 if (task->tk_status != -EJUKEBOX && task->tk_status != -EKEYEXPIRED) 47 return 0; 48 if (task->tk_status == -EJUKEBOX) 49 nfs_inc_stats(inode, NFSIOS_DELAY); 50 task->tk_status = 0; 51 rpc_restart_call(task); 52 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); 53 return 1; 54 } 55 56 static int 57 do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle, 58 struct nfs_fsinfo *info) 59 { 60 struct rpc_message msg = { 61 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO], 62 .rpc_argp = fhandle, 63 .rpc_resp = info, 64 }; 65 int status; 66 67 dprintk("%s: call fsinfo\n", __func__); 68 nfs_fattr_init(info->fattr); 69 status = rpc_call_sync(client, &msg, 0); 70 dprintk("%s: reply fsinfo: %d\n", __func__, status); 71 if (!(info->fattr->valid & NFS_ATTR_FATTR)) { 72 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR]; 73 msg.rpc_resp = info->fattr; 74 status = rpc_call_sync(client, &msg, 0); 75 dprintk("%s: reply getattr: %d\n", __func__, status); 76 } 77 return status; 78 } 79 80 /* 81 * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb 82 */ 83 static int 84 nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, 85 struct nfs_fsinfo *info) 86 { 87 int status; 88 89 status = do_proc_get_root(server->client, fhandle, info); 90 if (status && server->nfs_client->cl_rpcclient != server->client) 91 status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info); 92 return status; 93 } 94 95 /* 96 * One function for each procedure in the NFS protocol. 97 */ 98 static int 99 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 100 struct nfs_fattr *fattr) 101 { 102 struct rpc_message msg = { 103 .rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR], 104 .rpc_argp = fhandle, 105 .rpc_resp = fattr, 106 }; 107 int status; 108 109 dprintk("NFS call getattr\n"); 110 nfs_fattr_init(fattr); 111 status = rpc_call_sync(server->client, &msg, 0); 112 dprintk("NFS reply getattr: %d\n", status); 113 return status; 114 } 115 116 static int 117 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 118 struct iattr *sattr) 119 { 120 struct inode *inode = dentry->d_inode; 121 struct nfs3_sattrargs arg = { 122 .fh = NFS_FH(inode), 123 .sattr = sattr, 124 }; 125 struct rpc_message msg = { 126 .rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR], 127 .rpc_argp = &arg, 128 .rpc_resp = fattr, 129 }; 130 int status; 131 132 dprintk("NFS call setattr\n"); 133 if (sattr->ia_valid & ATTR_FILE) 134 msg.rpc_cred = nfs_file_cred(sattr->ia_file); 135 nfs_fattr_init(fattr); 136 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 137 if (status == 0) 138 nfs_setattr_update_inode(inode, sattr); 139 dprintk("NFS reply setattr: %d\n", status); 140 return status; 141 } 142 143 static int 144 nfs3_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name, 145 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 146 { 147 struct nfs3_diropargs arg = { 148 .fh = NFS_FH(dir), 149 .name = name->name, 150 .len = name->len 151 }; 152 struct nfs3_diropres res = { 153 .fh = fhandle, 154 .fattr = fattr 155 }; 156 struct rpc_message msg = { 157 .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP], 158 .rpc_argp = &arg, 159 .rpc_resp = &res, 160 }; 161 int status; 162 163 dprintk("NFS call lookup %s\n", name->name); 164 res.dir_attr = nfs_alloc_fattr(); 165 if (res.dir_attr == NULL) 166 return -ENOMEM; 167 168 nfs_fattr_init(fattr); 169 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 170 nfs_refresh_inode(dir, res.dir_attr); 171 if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) { 172 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR]; 173 msg.rpc_argp = fhandle; 174 msg.rpc_resp = fattr; 175 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 176 } 177 nfs_free_fattr(res.dir_attr); 178 dprintk("NFS reply lookup: %d\n", status); 179 return status; 180 } 181 182 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry) 183 { 184 struct nfs3_accessargs arg = { 185 .fh = NFS_FH(inode), 186 }; 187 struct nfs3_accessres res; 188 struct rpc_message msg = { 189 .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS], 190 .rpc_argp = &arg, 191 .rpc_resp = &res, 192 .rpc_cred = entry->cred, 193 }; 194 int mode = entry->mask; 195 int status = -ENOMEM; 196 197 dprintk("NFS call access\n"); 198 199 if (mode & MAY_READ) 200 arg.access |= NFS3_ACCESS_READ; 201 if (S_ISDIR(inode->i_mode)) { 202 if (mode & MAY_WRITE) 203 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE; 204 if (mode & MAY_EXEC) 205 arg.access |= NFS3_ACCESS_LOOKUP; 206 } else { 207 if (mode & MAY_WRITE) 208 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND; 209 if (mode & MAY_EXEC) 210 arg.access |= NFS3_ACCESS_EXECUTE; 211 } 212 213 res.fattr = nfs_alloc_fattr(); 214 if (res.fattr == NULL) 215 goto out; 216 217 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 218 nfs_refresh_inode(inode, res.fattr); 219 if (status == 0) { 220 entry->mask = 0; 221 if (res.access & NFS3_ACCESS_READ) 222 entry->mask |= MAY_READ; 223 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE)) 224 entry->mask |= MAY_WRITE; 225 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE)) 226 entry->mask |= MAY_EXEC; 227 } 228 nfs_free_fattr(res.fattr); 229 out: 230 dprintk("NFS reply access: %d\n", status); 231 return status; 232 } 233 234 static int nfs3_proc_readlink(struct inode *inode, struct page *page, 235 unsigned int pgbase, unsigned int pglen) 236 { 237 struct nfs_fattr *fattr; 238 struct nfs3_readlinkargs args = { 239 .fh = NFS_FH(inode), 240 .pgbase = pgbase, 241 .pglen = pglen, 242 .pages = &page 243 }; 244 struct rpc_message msg = { 245 .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK], 246 .rpc_argp = &args, 247 }; 248 int status = -ENOMEM; 249 250 dprintk("NFS call readlink\n"); 251 fattr = nfs_alloc_fattr(); 252 if (fattr == NULL) 253 goto out; 254 msg.rpc_resp = fattr; 255 256 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 257 nfs_refresh_inode(inode, fattr); 258 nfs_free_fattr(fattr); 259 out: 260 dprintk("NFS reply readlink: %d\n", status); 261 return status; 262 } 263 264 struct nfs3_createdata { 265 struct rpc_message msg; 266 union { 267 struct nfs3_createargs create; 268 struct nfs3_mkdirargs mkdir; 269 struct nfs3_symlinkargs symlink; 270 struct nfs3_mknodargs mknod; 271 } arg; 272 struct nfs3_diropres res; 273 struct nfs_fh fh; 274 struct nfs_fattr fattr; 275 struct nfs_fattr dir_attr; 276 }; 277 278 static struct nfs3_createdata *nfs3_alloc_createdata(void) 279 { 280 struct nfs3_createdata *data; 281 282 data = kzalloc(sizeof(*data), GFP_KERNEL); 283 if (data != NULL) { 284 data->msg.rpc_argp = &data->arg; 285 data->msg.rpc_resp = &data->res; 286 data->res.fh = &data->fh; 287 data->res.fattr = &data->fattr; 288 data->res.dir_attr = &data->dir_attr; 289 nfs_fattr_init(data->res.fattr); 290 nfs_fattr_init(data->res.dir_attr); 291 } 292 return data; 293 } 294 295 static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data) 296 { 297 int status; 298 299 status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0); 300 nfs_post_op_update_inode(dir, data->res.dir_attr); 301 if (status == 0) 302 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 303 return status; 304 } 305 306 static void nfs3_free_createdata(struct nfs3_createdata *data) 307 { 308 kfree(data); 309 } 310 311 /* 312 * Create a regular file. 313 */ 314 static int 315 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 316 int flags, struct nfs_open_context *ctx) 317 { 318 struct nfs3_createdata *data; 319 mode_t mode = sattr->ia_mode; 320 int status = -ENOMEM; 321 322 dprintk("NFS call create %s\n", dentry->d_name.name); 323 324 data = nfs3_alloc_createdata(); 325 if (data == NULL) 326 goto out; 327 328 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE]; 329 data->arg.create.fh = NFS_FH(dir); 330 data->arg.create.name = dentry->d_name.name; 331 data->arg.create.len = dentry->d_name.len; 332 data->arg.create.sattr = sattr; 333 334 data->arg.create.createmode = NFS3_CREATE_UNCHECKED; 335 if (flags & O_EXCL) { 336 data->arg.create.createmode = NFS3_CREATE_EXCLUSIVE; 337 data->arg.create.verifier[0] = jiffies; 338 data->arg.create.verifier[1] = current->pid; 339 } 340 341 sattr->ia_mode &= ~current_umask(); 342 343 for (;;) { 344 status = nfs3_do_create(dir, dentry, data); 345 346 if (status != -ENOTSUPP) 347 break; 348 /* If the server doesn't support the exclusive creation 349 * semantics, try again with simple 'guarded' mode. */ 350 switch (data->arg.create.createmode) { 351 case NFS3_CREATE_EXCLUSIVE: 352 data->arg.create.createmode = NFS3_CREATE_GUARDED; 353 break; 354 355 case NFS3_CREATE_GUARDED: 356 data->arg.create.createmode = NFS3_CREATE_UNCHECKED; 357 break; 358 359 case NFS3_CREATE_UNCHECKED: 360 goto out; 361 } 362 nfs_fattr_init(data->res.dir_attr); 363 nfs_fattr_init(data->res.fattr); 364 } 365 366 if (status != 0) 367 goto out; 368 369 /* When we created the file with exclusive semantics, make 370 * sure we set the attributes afterwards. */ 371 if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) { 372 dprintk("NFS call setattr (post-create)\n"); 373 374 if (!(sattr->ia_valid & ATTR_ATIME_SET)) 375 sattr->ia_valid |= ATTR_ATIME; 376 if (!(sattr->ia_valid & ATTR_MTIME_SET)) 377 sattr->ia_valid |= ATTR_MTIME; 378 379 /* Note: we could use a guarded setattr here, but I'm 380 * not sure this buys us anything (and I'd have 381 * to revamp the NFSv3 XDR code) */ 382 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr); 383 nfs_post_op_update_inode(dentry->d_inode, data->res.fattr); 384 dprintk("NFS reply setattr (post-create): %d\n", status); 385 if (status != 0) 386 goto out; 387 } 388 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode); 389 out: 390 nfs3_free_createdata(data); 391 dprintk("NFS reply create: %d\n", status); 392 return status; 393 } 394 395 static int 396 nfs3_proc_remove(struct inode *dir, struct qstr *name) 397 { 398 struct nfs_removeargs arg = { 399 .fh = NFS_FH(dir), 400 .name.len = name->len, 401 .name.name = name->name, 402 }; 403 struct nfs_removeres res; 404 struct rpc_message msg = { 405 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE], 406 .rpc_argp = &arg, 407 .rpc_resp = &res, 408 }; 409 int status = -ENOMEM; 410 411 dprintk("NFS call remove %s\n", name->name); 412 res.dir_attr = nfs_alloc_fattr(); 413 if (res.dir_attr == NULL) 414 goto out; 415 416 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 417 nfs_post_op_update_inode(dir, res.dir_attr); 418 nfs_free_fattr(res.dir_attr); 419 out: 420 dprintk("NFS reply remove: %d\n", status); 421 return status; 422 } 423 424 static void 425 nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) 426 { 427 msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE]; 428 } 429 430 static int 431 nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir) 432 { 433 struct nfs_removeres *res; 434 if (nfs3_async_handle_jukebox(task, dir)) 435 return 0; 436 res = task->tk_msg.rpc_resp; 437 nfs_post_op_update_inode(dir, res->dir_attr); 438 return 1; 439 } 440 441 static void 442 nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir) 443 { 444 msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME]; 445 } 446 447 static int 448 nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 449 struct inode *new_dir) 450 { 451 struct nfs_renameres *res; 452 453 if (nfs3_async_handle_jukebox(task, old_dir)) 454 return 0; 455 res = task->tk_msg.rpc_resp; 456 457 nfs_post_op_update_inode(old_dir, res->old_fattr); 458 nfs_post_op_update_inode(new_dir, res->new_fattr); 459 return 1; 460 } 461 462 static int 463 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name, 464 struct inode *new_dir, struct qstr *new_name) 465 { 466 struct nfs_renameargs arg = { 467 .old_dir = NFS_FH(old_dir), 468 .old_name = old_name, 469 .new_dir = NFS_FH(new_dir), 470 .new_name = new_name, 471 }; 472 struct nfs_renameres res; 473 struct rpc_message msg = { 474 .rpc_proc = &nfs3_procedures[NFS3PROC_RENAME], 475 .rpc_argp = &arg, 476 .rpc_resp = &res, 477 }; 478 int status = -ENOMEM; 479 480 dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); 481 482 res.old_fattr = nfs_alloc_fattr(); 483 res.new_fattr = nfs_alloc_fattr(); 484 if (res.old_fattr == NULL || res.new_fattr == NULL) 485 goto out; 486 487 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); 488 nfs_post_op_update_inode(old_dir, res.old_fattr); 489 nfs_post_op_update_inode(new_dir, res.new_fattr); 490 out: 491 nfs_free_fattr(res.old_fattr); 492 nfs_free_fattr(res.new_fattr); 493 dprintk("NFS reply rename: %d\n", status); 494 return status; 495 } 496 497 static int 498 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 499 { 500 struct nfs3_linkargs arg = { 501 .fromfh = NFS_FH(inode), 502 .tofh = NFS_FH(dir), 503 .toname = name->name, 504 .tolen = name->len 505 }; 506 struct nfs3_linkres res; 507 struct rpc_message msg = { 508 .rpc_proc = &nfs3_procedures[NFS3PROC_LINK], 509 .rpc_argp = &arg, 510 .rpc_resp = &res, 511 }; 512 int status = -ENOMEM; 513 514 dprintk("NFS call link %s\n", name->name); 515 res.fattr = nfs_alloc_fattr(); 516 res.dir_attr = nfs_alloc_fattr(); 517 if (res.fattr == NULL || res.dir_attr == NULL) 518 goto out; 519 520 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 521 nfs_post_op_update_inode(dir, res.dir_attr); 522 nfs_post_op_update_inode(inode, res.fattr); 523 out: 524 nfs_free_fattr(res.dir_attr); 525 nfs_free_fattr(res.fattr); 526 dprintk("NFS reply link: %d\n", status); 527 return status; 528 } 529 530 static int 531 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, 532 unsigned int len, struct iattr *sattr) 533 { 534 struct nfs3_createdata *data; 535 int status = -ENOMEM; 536 537 if (len > NFS3_MAXPATHLEN) 538 return -ENAMETOOLONG; 539 540 dprintk("NFS call symlink %s\n", dentry->d_name.name); 541 542 data = nfs3_alloc_createdata(); 543 if (data == NULL) 544 goto out; 545 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK]; 546 data->arg.symlink.fromfh = NFS_FH(dir); 547 data->arg.symlink.fromname = dentry->d_name.name; 548 data->arg.symlink.fromlen = dentry->d_name.len; 549 data->arg.symlink.pages = &page; 550 data->arg.symlink.pathlen = len; 551 data->arg.symlink.sattr = sattr; 552 553 status = nfs3_do_create(dir, dentry, data); 554 555 nfs3_free_createdata(data); 556 out: 557 dprintk("NFS reply symlink: %d\n", status); 558 return status; 559 } 560 561 static int 562 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) 563 { 564 struct nfs3_createdata *data; 565 int mode = sattr->ia_mode; 566 int status = -ENOMEM; 567 568 dprintk("NFS call mkdir %s\n", dentry->d_name.name); 569 570 sattr->ia_mode &= ~current_umask(); 571 572 data = nfs3_alloc_createdata(); 573 if (data == NULL) 574 goto out; 575 576 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR]; 577 data->arg.mkdir.fh = NFS_FH(dir); 578 data->arg.mkdir.name = dentry->d_name.name; 579 data->arg.mkdir.len = dentry->d_name.len; 580 data->arg.mkdir.sattr = sattr; 581 582 status = nfs3_do_create(dir, dentry, data); 583 if (status != 0) 584 goto out; 585 586 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode); 587 out: 588 nfs3_free_createdata(data); 589 dprintk("NFS reply mkdir: %d\n", status); 590 return status; 591 } 592 593 static int 594 nfs3_proc_rmdir(struct inode *dir, struct qstr *name) 595 { 596 struct nfs_fattr *dir_attr; 597 struct nfs3_diropargs arg = { 598 .fh = NFS_FH(dir), 599 .name = name->name, 600 .len = name->len 601 }; 602 struct rpc_message msg = { 603 .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR], 604 .rpc_argp = &arg, 605 }; 606 int status = -ENOMEM; 607 608 dprintk("NFS call rmdir %s\n", name->name); 609 dir_attr = nfs_alloc_fattr(); 610 if (dir_attr == NULL) 611 goto out; 612 613 msg.rpc_resp = dir_attr; 614 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 615 nfs_post_op_update_inode(dir, dir_attr); 616 nfs_free_fattr(dir_attr); 617 out: 618 dprintk("NFS reply rmdir: %d\n", status); 619 return status; 620 } 621 622 /* 623 * The READDIR implementation is somewhat hackish - we pass the user buffer 624 * to the encode function, which installs it in the receive iovec. 625 * The decode function itself doesn't perform any decoding, it just makes 626 * sure the reply is syntactically correct. 627 * 628 * Also note that this implementation handles both plain readdir and 629 * readdirplus. 630 */ 631 static int 632 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 633 u64 cookie, struct page **pages, unsigned int count, int plus) 634 { 635 struct inode *dir = dentry->d_inode; 636 __be32 *verf = NFS_COOKIEVERF(dir); 637 struct nfs3_readdirargs arg = { 638 .fh = NFS_FH(dir), 639 .cookie = cookie, 640 .verf = {verf[0], verf[1]}, 641 .plus = plus, 642 .count = count, 643 .pages = pages 644 }; 645 struct nfs3_readdirres res = { 646 .verf = verf, 647 .plus = plus 648 }; 649 struct rpc_message msg = { 650 .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR], 651 .rpc_argp = &arg, 652 .rpc_resp = &res, 653 .rpc_cred = cred 654 }; 655 int status = -ENOMEM; 656 657 if (plus) 658 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS]; 659 660 dprintk("NFS call readdir%s %d\n", 661 plus? "plus" : "", (unsigned int) cookie); 662 663 res.dir_attr = nfs_alloc_fattr(); 664 if (res.dir_attr == NULL) 665 goto out; 666 667 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 668 669 nfs_invalidate_atime(dir); 670 nfs_refresh_inode(dir, res.dir_attr); 671 672 nfs_free_fattr(res.dir_attr); 673 out: 674 dprintk("NFS reply readdir%s: %d\n", 675 plus? "plus" : "", status); 676 return status; 677 } 678 679 static int 680 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 681 dev_t rdev) 682 { 683 struct nfs3_createdata *data; 684 mode_t mode = sattr->ia_mode; 685 int status = -ENOMEM; 686 687 dprintk("NFS call mknod %s %u:%u\n", dentry->d_name.name, 688 MAJOR(rdev), MINOR(rdev)); 689 690 sattr->ia_mode &= ~current_umask(); 691 692 data = nfs3_alloc_createdata(); 693 if (data == NULL) 694 goto out; 695 696 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD]; 697 data->arg.mknod.fh = NFS_FH(dir); 698 data->arg.mknod.name = dentry->d_name.name; 699 data->arg.mknod.len = dentry->d_name.len; 700 data->arg.mknod.sattr = sattr; 701 data->arg.mknod.rdev = rdev; 702 703 switch (sattr->ia_mode & S_IFMT) { 704 case S_IFBLK: 705 data->arg.mknod.type = NF3BLK; 706 break; 707 case S_IFCHR: 708 data->arg.mknod.type = NF3CHR; 709 break; 710 case S_IFIFO: 711 data->arg.mknod.type = NF3FIFO; 712 break; 713 case S_IFSOCK: 714 data->arg.mknod.type = NF3SOCK; 715 break; 716 default: 717 status = -EINVAL; 718 goto out; 719 } 720 721 status = nfs3_do_create(dir, dentry, data); 722 if (status != 0) 723 goto out; 724 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode); 725 out: 726 nfs3_free_createdata(data); 727 dprintk("NFS reply mknod: %d\n", status); 728 return status; 729 } 730 731 static int 732 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 733 struct nfs_fsstat *stat) 734 { 735 struct rpc_message msg = { 736 .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT], 737 .rpc_argp = fhandle, 738 .rpc_resp = stat, 739 }; 740 int status; 741 742 dprintk("NFS call fsstat\n"); 743 nfs_fattr_init(stat->fattr); 744 status = rpc_call_sync(server->client, &msg, 0); 745 dprintk("NFS reply fsstat: %d\n", status); 746 return status; 747 } 748 749 static int 750 do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle, 751 struct nfs_fsinfo *info) 752 { 753 struct rpc_message msg = { 754 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO], 755 .rpc_argp = fhandle, 756 .rpc_resp = info, 757 }; 758 int status; 759 760 dprintk("NFS call fsinfo\n"); 761 nfs_fattr_init(info->fattr); 762 status = rpc_call_sync(client, &msg, 0); 763 dprintk("NFS reply fsinfo: %d\n", status); 764 return status; 765 } 766 767 /* 768 * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via 769 * nfs_create_server 770 */ 771 static int 772 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 773 struct nfs_fsinfo *info) 774 { 775 int status; 776 777 status = do_proc_fsinfo(server->client, fhandle, info); 778 if (status && server->nfs_client->cl_rpcclient != server->client) 779 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info); 780 return status; 781 } 782 783 static int 784 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 785 struct nfs_pathconf *info) 786 { 787 struct rpc_message msg = { 788 .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF], 789 .rpc_argp = fhandle, 790 .rpc_resp = info, 791 }; 792 int status; 793 794 dprintk("NFS call pathconf\n"); 795 nfs_fattr_init(info->fattr); 796 status = rpc_call_sync(server->client, &msg, 0); 797 dprintk("NFS reply pathconf: %d\n", status); 798 return status; 799 } 800 801 static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data) 802 { 803 if (nfs3_async_handle_jukebox(task, data->inode)) 804 return -EAGAIN; 805 806 nfs_invalidate_atime(data->inode); 807 nfs_refresh_inode(data->inode, &data->fattr); 808 return 0; 809 } 810 811 static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) 812 { 813 msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ]; 814 } 815 816 static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data) 817 { 818 if (nfs3_async_handle_jukebox(task, data->inode)) 819 return -EAGAIN; 820 if (task->tk_status >= 0) 821 nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr); 822 return 0; 823 } 824 825 static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) 826 { 827 msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE]; 828 } 829 830 static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data) 831 { 832 if (nfs3_async_handle_jukebox(task, data->inode)) 833 return -EAGAIN; 834 nfs_refresh_inode(data->inode, data->res.fattr); 835 return 0; 836 } 837 838 static void nfs3_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) 839 { 840 msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT]; 841 } 842 843 static int 844 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl) 845 { 846 struct inode *inode = filp->f_path.dentry->d_inode; 847 848 return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl); 849 } 850 851 const struct nfs_rpc_ops nfs_v3_clientops = { 852 .version = 3, /* protocol version */ 853 .dentry_ops = &nfs_dentry_operations, 854 .dir_inode_ops = &nfs3_dir_inode_operations, 855 .file_inode_ops = &nfs3_file_inode_operations, 856 .getroot = nfs3_proc_get_root, 857 .getattr = nfs3_proc_getattr, 858 .setattr = nfs3_proc_setattr, 859 .lookup = nfs3_proc_lookup, 860 .access = nfs3_proc_access, 861 .readlink = nfs3_proc_readlink, 862 .create = nfs3_proc_create, 863 .remove = nfs3_proc_remove, 864 .unlink_setup = nfs3_proc_unlink_setup, 865 .unlink_done = nfs3_proc_unlink_done, 866 .rename = nfs3_proc_rename, 867 .rename_setup = nfs3_proc_rename_setup, 868 .rename_done = nfs3_proc_rename_done, 869 .link = nfs3_proc_link, 870 .symlink = nfs3_proc_symlink, 871 .mkdir = nfs3_proc_mkdir, 872 .rmdir = nfs3_proc_rmdir, 873 .readdir = nfs3_proc_readdir, 874 .mknod = nfs3_proc_mknod, 875 .statfs = nfs3_proc_statfs, 876 .fsinfo = nfs3_proc_fsinfo, 877 .pathconf = nfs3_proc_pathconf, 878 .decode_dirent = nfs3_decode_dirent, 879 .read_setup = nfs3_proc_read_setup, 880 .read_done = nfs3_read_done, 881 .write_setup = nfs3_proc_write_setup, 882 .write_done = nfs3_write_done, 883 .commit_setup = nfs3_proc_commit_setup, 884 .commit_done = nfs3_commit_done, 885 .lock = nfs3_proc_lock, 886 .clear_acl_cache = nfs3_forget_cached_acls, 887 .close_context = nfs_close_context, 888 .init_client = nfs_init_client, 889 }; 890