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 #include <linux/freezer.h> 21 #include <linux/xattr.h> 22 23 #include "iostat.h" 24 #include "internal.h" 25 #include "nfs3_fs.h" 26 27 #define NFSDBG_FACILITY NFSDBG_PROC 28 29 /* A wrapper to handle the EJUKEBOX error messages */ 30 static int 31 nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) 32 { 33 int res; 34 do { 35 res = rpc_call_sync(clnt, msg, flags); 36 if (res != -EJUKEBOX) 37 break; 38 freezable_schedule_timeout_killable_unsafe(NFS_JUKEBOX_RETRY_TIME); 39 res = -ERESTARTSYS; 40 } while (!fatal_signal_pending(current)); 41 return res; 42 } 43 44 #define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags) 45 46 static int 47 nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode) 48 { 49 if (task->tk_status != -EJUKEBOX) 50 return 0; 51 if (task->tk_status == -EJUKEBOX) 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", __func__); 71 nfs_fattr_init(info->fattr); 72 status = rpc_call_sync(client, &msg, 0); 73 dprintk("%s: reply fsinfo: %d\n", __func__, status); 74 if (status == 0 && !(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", __func__, status); 79 } 80 return status; 81 } 82 83 /* 84 * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb 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->nfs_client->cl_rpcclient != server->client) 94 status = do_proc_get_root(server->nfs_client->cl_rpcclient, 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, struct nfs4_label *label) 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 = d_inode(dentry); 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 if (sattr->ia_valid & ATTR_FILE) 137 msg.rpc_cred = nfs_file_cred(sattr->ia_file); 138 nfs_fattr_init(fattr); 139 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 140 if (status == 0) 141 nfs_setattr_update_inode(inode, sattr, fattr); 142 dprintk("NFS reply setattr: %d\n", status); 143 return status; 144 } 145 146 static int 147 nfs3_proc_lookup(struct inode *dir, struct qstr *name, 148 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 149 struct nfs4_label *label) 150 { 151 struct nfs3_diropargs arg = { 152 .fh = NFS_FH(dir), 153 .name = name->name, 154 .len = name->len 155 }; 156 struct nfs3_diropres res = { 157 .fh = fhandle, 158 .fattr = fattr 159 }; 160 struct rpc_message msg = { 161 .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP], 162 .rpc_argp = &arg, 163 .rpc_resp = &res, 164 }; 165 int status; 166 167 dprintk("NFS call lookup %s\n", name->name); 168 res.dir_attr = nfs_alloc_fattr(); 169 if (res.dir_attr == NULL) 170 return -ENOMEM; 171 172 nfs_fattr_init(fattr); 173 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 174 nfs_refresh_inode(dir, res.dir_attr); 175 if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) { 176 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR]; 177 msg.rpc_argp = fhandle; 178 msg.rpc_resp = fattr; 179 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 180 } 181 nfs_free_fattr(res.dir_attr); 182 dprintk("NFS reply lookup: %d\n", status); 183 return status; 184 } 185 186 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry) 187 { 188 struct nfs3_accessargs arg = { 189 .fh = NFS_FH(inode), 190 }; 191 struct nfs3_accessres res; 192 struct rpc_message msg = { 193 .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS], 194 .rpc_argp = &arg, 195 .rpc_resp = &res, 196 .rpc_cred = entry->cred, 197 }; 198 int mode = entry->mask; 199 int status = -ENOMEM; 200 201 dprintk("NFS call access\n"); 202 203 if (mode & MAY_READ) 204 arg.access |= NFS3_ACCESS_READ; 205 if (S_ISDIR(inode->i_mode)) { 206 if (mode & MAY_WRITE) 207 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE; 208 if (mode & MAY_EXEC) 209 arg.access |= NFS3_ACCESS_LOOKUP; 210 } else { 211 if (mode & MAY_WRITE) 212 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND; 213 if (mode & MAY_EXEC) 214 arg.access |= NFS3_ACCESS_EXECUTE; 215 } 216 217 res.fattr = nfs_alloc_fattr(); 218 if (res.fattr == NULL) 219 goto out; 220 221 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 222 nfs_refresh_inode(inode, res.fattr); 223 if (status == 0) { 224 entry->mask = 0; 225 if (res.access & NFS3_ACCESS_READ) 226 entry->mask |= MAY_READ; 227 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE)) 228 entry->mask |= MAY_WRITE; 229 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE)) 230 entry->mask |= MAY_EXEC; 231 } 232 nfs_free_fattr(res.fattr); 233 out: 234 dprintk("NFS reply access: %d\n", status); 235 return status; 236 } 237 238 static int nfs3_proc_readlink(struct inode *inode, struct page *page, 239 unsigned int pgbase, unsigned int pglen) 240 { 241 struct nfs_fattr *fattr; 242 struct nfs3_readlinkargs args = { 243 .fh = NFS_FH(inode), 244 .pgbase = pgbase, 245 .pglen = pglen, 246 .pages = &page 247 }; 248 struct rpc_message msg = { 249 .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK], 250 .rpc_argp = &args, 251 }; 252 int status = -ENOMEM; 253 254 dprintk("NFS call readlink\n"); 255 fattr = nfs_alloc_fattr(); 256 if (fattr == NULL) 257 goto out; 258 msg.rpc_resp = fattr; 259 260 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 261 nfs_refresh_inode(inode, fattr); 262 nfs_free_fattr(fattr); 263 out: 264 dprintk("NFS reply readlink: %d\n", status); 265 return status; 266 } 267 268 struct nfs3_createdata { 269 struct rpc_message msg; 270 union { 271 struct nfs3_createargs create; 272 struct nfs3_mkdirargs mkdir; 273 struct nfs3_symlinkargs symlink; 274 struct nfs3_mknodargs mknod; 275 } arg; 276 struct nfs3_diropres res; 277 struct nfs_fh fh; 278 struct nfs_fattr fattr; 279 struct nfs_fattr dir_attr; 280 }; 281 282 static struct nfs3_createdata *nfs3_alloc_createdata(void) 283 { 284 struct nfs3_createdata *data; 285 286 data = kzalloc(sizeof(*data), GFP_KERNEL); 287 if (data != NULL) { 288 data->msg.rpc_argp = &data->arg; 289 data->msg.rpc_resp = &data->res; 290 data->res.fh = &data->fh; 291 data->res.fattr = &data->fattr; 292 data->res.dir_attr = &data->dir_attr; 293 nfs_fattr_init(data->res.fattr); 294 nfs_fattr_init(data->res.dir_attr); 295 } 296 return data; 297 } 298 299 static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data) 300 { 301 int status; 302 303 status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0); 304 nfs_post_op_update_inode(dir, data->res.dir_attr); 305 if (status == 0) 306 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL); 307 return status; 308 } 309 310 static void nfs3_free_createdata(struct nfs3_createdata *data) 311 { 312 kfree(data); 313 } 314 315 /* 316 * Create a regular file. 317 */ 318 static int 319 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 320 int flags) 321 { 322 struct posix_acl *default_acl, *acl; 323 struct nfs3_createdata *data; 324 int status = -ENOMEM; 325 326 dprintk("NFS call create %pd\n", dentry); 327 328 data = nfs3_alloc_createdata(); 329 if (data == NULL) 330 goto out; 331 332 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE]; 333 data->arg.create.fh = NFS_FH(dir); 334 data->arg.create.name = dentry->d_name.name; 335 data->arg.create.len = dentry->d_name.len; 336 data->arg.create.sattr = sattr; 337 338 data->arg.create.createmode = NFS3_CREATE_UNCHECKED; 339 if (flags & O_EXCL) { 340 data->arg.create.createmode = NFS3_CREATE_EXCLUSIVE; 341 data->arg.create.verifier[0] = cpu_to_be32(jiffies); 342 data->arg.create.verifier[1] = cpu_to_be32(current->pid); 343 } 344 345 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl); 346 if (status) 347 goto out; 348 349 for (;;) { 350 status = nfs3_do_create(dir, dentry, data); 351 352 if (status != -ENOTSUPP) 353 break; 354 /* If the server doesn't support the exclusive creation 355 * semantics, try again with simple 'guarded' mode. */ 356 switch (data->arg.create.createmode) { 357 case NFS3_CREATE_EXCLUSIVE: 358 data->arg.create.createmode = NFS3_CREATE_GUARDED; 359 break; 360 361 case NFS3_CREATE_GUARDED: 362 data->arg.create.createmode = NFS3_CREATE_UNCHECKED; 363 break; 364 365 case NFS3_CREATE_UNCHECKED: 366 goto out; 367 } 368 nfs_fattr_init(data->res.dir_attr); 369 nfs_fattr_init(data->res.fattr); 370 } 371 372 if (status != 0) 373 goto out_release_acls; 374 375 /* When we created the file with exclusive semantics, make 376 * sure we set the attributes afterwards. */ 377 if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) { 378 dprintk("NFS call setattr (post-create)\n"); 379 380 if (!(sattr->ia_valid & ATTR_ATIME_SET)) 381 sattr->ia_valid |= ATTR_ATIME; 382 if (!(sattr->ia_valid & ATTR_MTIME_SET)) 383 sattr->ia_valid |= ATTR_MTIME; 384 385 /* Note: we could use a guarded setattr here, but I'm 386 * not sure this buys us anything (and I'd have 387 * to revamp the NFSv3 XDR code) */ 388 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr); 389 nfs_post_op_update_inode(d_inode(dentry), data->res.fattr); 390 dprintk("NFS reply setattr (post-create): %d\n", status); 391 if (status != 0) 392 goto out_release_acls; 393 } 394 395 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl); 396 397 out_release_acls: 398 posix_acl_release(acl); 399 posix_acl_release(default_acl); 400 out: 401 nfs3_free_createdata(data); 402 dprintk("NFS reply create: %d\n", status); 403 return status; 404 } 405 406 static int 407 nfs3_proc_remove(struct inode *dir, struct qstr *name) 408 { 409 struct nfs_removeargs arg = { 410 .fh = NFS_FH(dir), 411 .name = *name, 412 }; 413 struct nfs_removeres res; 414 struct rpc_message msg = { 415 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE], 416 .rpc_argp = &arg, 417 .rpc_resp = &res, 418 }; 419 int status = -ENOMEM; 420 421 dprintk("NFS call remove %s\n", name->name); 422 res.dir_attr = nfs_alloc_fattr(); 423 if (res.dir_attr == NULL) 424 goto out; 425 426 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 427 nfs_post_op_update_inode(dir, res.dir_attr); 428 nfs_free_fattr(res.dir_attr); 429 out: 430 dprintk("NFS reply remove: %d\n", status); 431 return status; 432 } 433 434 static void 435 nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) 436 { 437 msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE]; 438 } 439 440 static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 441 { 442 rpc_call_start(task); 443 } 444 445 static int 446 nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir) 447 { 448 struct nfs_removeres *res; 449 if (nfs3_async_handle_jukebox(task, dir)) 450 return 0; 451 res = task->tk_msg.rpc_resp; 452 nfs_post_op_update_inode(dir, res->dir_attr); 453 return 1; 454 } 455 456 static void 457 nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir) 458 { 459 msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME]; 460 } 461 462 static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 463 { 464 rpc_call_start(task); 465 } 466 467 static int 468 nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 469 struct inode *new_dir) 470 { 471 struct nfs_renameres *res; 472 473 if (nfs3_async_handle_jukebox(task, old_dir)) 474 return 0; 475 res = task->tk_msg.rpc_resp; 476 477 nfs_post_op_update_inode(old_dir, res->old_fattr); 478 nfs_post_op_update_inode(new_dir, res->new_fattr); 479 return 1; 480 } 481 482 static int 483 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 484 { 485 struct nfs3_linkargs arg = { 486 .fromfh = NFS_FH(inode), 487 .tofh = NFS_FH(dir), 488 .toname = name->name, 489 .tolen = name->len 490 }; 491 struct nfs3_linkres res; 492 struct rpc_message msg = { 493 .rpc_proc = &nfs3_procedures[NFS3PROC_LINK], 494 .rpc_argp = &arg, 495 .rpc_resp = &res, 496 }; 497 int status = -ENOMEM; 498 499 dprintk("NFS call link %s\n", name->name); 500 res.fattr = nfs_alloc_fattr(); 501 res.dir_attr = nfs_alloc_fattr(); 502 if (res.fattr == NULL || res.dir_attr == NULL) 503 goto out; 504 505 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 506 nfs_post_op_update_inode(dir, res.dir_attr); 507 nfs_post_op_update_inode(inode, res.fattr); 508 out: 509 nfs_free_fattr(res.dir_attr); 510 nfs_free_fattr(res.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 dentry *dentry, struct page *page, 517 unsigned int len, struct iattr *sattr) 518 { 519 struct nfs3_createdata *data; 520 int status = -ENOMEM; 521 522 if (len > NFS3_MAXPATHLEN) 523 return -ENAMETOOLONG; 524 525 dprintk("NFS call symlink %pd\n", dentry); 526 527 data = nfs3_alloc_createdata(); 528 if (data == NULL) 529 goto out; 530 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK]; 531 data->arg.symlink.fromfh = NFS_FH(dir); 532 data->arg.symlink.fromname = dentry->d_name.name; 533 data->arg.symlink.fromlen = dentry->d_name.len; 534 data->arg.symlink.pages = &page; 535 data->arg.symlink.pathlen = len; 536 data->arg.symlink.sattr = sattr; 537 538 status = nfs3_do_create(dir, dentry, data); 539 540 nfs3_free_createdata(data); 541 out: 542 dprintk("NFS reply symlink: %d\n", status); 543 return status; 544 } 545 546 static int 547 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) 548 { 549 struct posix_acl *default_acl, *acl; 550 struct nfs3_createdata *data; 551 int status = -ENOMEM; 552 553 dprintk("NFS call mkdir %pd\n", dentry); 554 555 data = nfs3_alloc_createdata(); 556 if (data == NULL) 557 goto out; 558 559 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl); 560 if (status) 561 goto out; 562 563 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR]; 564 data->arg.mkdir.fh = NFS_FH(dir); 565 data->arg.mkdir.name = dentry->d_name.name; 566 data->arg.mkdir.len = dentry->d_name.len; 567 data->arg.mkdir.sattr = sattr; 568 569 status = nfs3_do_create(dir, dentry, data); 570 if (status != 0) 571 goto out_release_acls; 572 573 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl); 574 575 out_release_acls: 576 posix_acl_release(acl); 577 posix_acl_release(default_acl); 578 out: 579 nfs3_free_createdata(data); 580 dprintk("NFS reply mkdir: %d\n", status); 581 return status; 582 } 583 584 static int 585 nfs3_proc_rmdir(struct inode *dir, struct qstr *name) 586 { 587 struct nfs_fattr *dir_attr; 588 struct nfs3_diropargs arg = { 589 .fh = NFS_FH(dir), 590 .name = name->name, 591 .len = name->len 592 }; 593 struct rpc_message msg = { 594 .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR], 595 .rpc_argp = &arg, 596 }; 597 int status = -ENOMEM; 598 599 dprintk("NFS call rmdir %s\n", name->name); 600 dir_attr = nfs_alloc_fattr(); 601 if (dir_attr == NULL) 602 goto out; 603 604 msg.rpc_resp = dir_attr; 605 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 606 nfs_post_op_update_inode(dir, dir_attr); 607 nfs_free_fattr(dir_attr); 608 out: 609 dprintk("NFS reply rmdir: %d\n", status); 610 return status; 611 } 612 613 /* 614 * The READDIR implementation is somewhat hackish - we pass the user buffer 615 * to the encode function, which installs it in the receive iovec. 616 * The decode function itself doesn't perform any decoding, it just makes 617 * sure the reply is syntactically correct. 618 * 619 * Also note that this implementation handles both plain readdir and 620 * readdirplus. 621 */ 622 static int 623 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 624 u64 cookie, struct page **pages, unsigned int count, int plus) 625 { 626 struct inode *dir = d_inode(dentry); 627 __be32 *verf = NFS_I(dir)->cookieverf; 628 struct nfs3_readdirargs arg = { 629 .fh = NFS_FH(dir), 630 .cookie = cookie, 631 .verf = {verf[0], verf[1]}, 632 .plus = plus, 633 .count = count, 634 .pages = pages 635 }; 636 struct nfs3_readdirres res = { 637 .verf = verf, 638 .plus = plus 639 }; 640 struct rpc_message msg = { 641 .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR], 642 .rpc_argp = &arg, 643 .rpc_resp = &res, 644 .rpc_cred = cred 645 }; 646 int status = -ENOMEM; 647 648 if (plus) 649 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS]; 650 651 dprintk("NFS call readdir%s %d\n", 652 plus? "plus" : "", (unsigned int) cookie); 653 654 res.dir_attr = nfs_alloc_fattr(); 655 if (res.dir_attr == NULL) 656 goto out; 657 658 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 659 660 nfs_invalidate_atime(dir); 661 nfs_refresh_inode(dir, res.dir_attr); 662 663 nfs_free_fattr(res.dir_attr); 664 out: 665 dprintk("NFS reply readdir%s: %d\n", 666 plus? "plus" : "", status); 667 return status; 668 } 669 670 static int 671 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 672 dev_t rdev) 673 { 674 struct posix_acl *default_acl, *acl; 675 struct nfs3_createdata *data; 676 int status = -ENOMEM; 677 678 dprintk("NFS call mknod %pd %u:%u\n", dentry, 679 MAJOR(rdev), MINOR(rdev)); 680 681 data = nfs3_alloc_createdata(); 682 if (data == NULL) 683 goto out; 684 685 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl); 686 if (status) 687 goto out; 688 689 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD]; 690 data->arg.mknod.fh = NFS_FH(dir); 691 data->arg.mknod.name = dentry->d_name.name; 692 data->arg.mknod.len = dentry->d_name.len; 693 data->arg.mknod.sattr = sattr; 694 data->arg.mknod.rdev = rdev; 695 696 switch (sattr->ia_mode & S_IFMT) { 697 case S_IFBLK: 698 data->arg.mknod.type = NF3BLK; 699 break; 700 case S_IFCHR: 701 data->arg.mknod.type = NF3CHR; 702 break; 703 case S_IFIFO: 704 data->arg.mknod.type = NF3FIFO; 705 break; 706 case S_IFSOCK: 707 data->arg.mknod.type = NF3SOCK; 708 break; 709 default: 710 status = -EINVAL; 711 goto out; 712 } 713 714 status = nfs3_do_create(dir, dentry, data); 715 if (status != 0) 716 goto out_release_acls; 717 718 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl); 719 720 out_release_acls: 721 posix_acl_release(acl); 722 posix_acl_release(default_acl); 723 out: 724 nfs3_free_createdata(data); 725 dprintk("NFS reply mknod: %d\n", status); 726 return status; 727 } 728 729 static int 730 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 731 struct nfs_fsstat *stat) 732 { 733 struct rpc_message msg = { 734 .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT], 735 .rpc_argp = fhandle, 736 .rpc_resp = stat, 737 }; 738 int status; 739 740 dprintk("NFS call fsstat\n"); 741 nfs_fattr_init(stat->fattr); 742 status = rpc_call_sync(server->client, &msg, 0); 743 dprintk("NFS reply fsstat: %d\n", status); 744 return status; 745 } 746 747 static int 748 do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle, 749 struct nfs_fsinfo *info) 750 { 751 struct rpc_message msg = { 752 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO], 753 .rpc_argp = fhandle, 754 .rpc_resp = info, 755 }; 756 int status; 757 758 dprintk("NFS call fsinfo\n"); 759 nfs_fattr_init(info->fattr); 760 status = rpc_call_sync(client, &msg, 0); 761 dprintk("NFS reply fsinfo: %d\n", status); 762 return status; 763 } 764 765 /* 766 * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via 767 * nfs_create_server 768 */ 769 static int 770 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 771 struct nfs_fsinfo *info) 772 { 773 int status; 774 775 status = do_proc_fsinfo(server->client, fhandle, info); 776 if (status && server->nfs_client->cl_rpcclient != server->client) 777 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info); 778 return status; 779 } 780 781 static int 782 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 783 struct nfs_pathconf *info) 784 { 785 struct rpc_message msg = { 786 .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF], 787 .rpc_argp = fhandle, 788 .rpc_resp = info, 789 }; 790 int status; 791 792 dprintk("NFS call pathconf\n"); 793 nfs_fattr_init(info->fattr); 794 status = rpc_call_sync(server->client, &msg, 0); 795 dprintk("NFS reply pathconf: %d\n", status); 796 return status; 797 } 798 799 static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 800 { 801 struct inode *inode = hdr->inode; 802 803 if (hdr->pgio_done_cb != NULL) 804 return hdr->pgio_done_cb(task, hdr); 805 806 if (nfs3_async_handle_jukebox(task, inode)) 807 return -EAGAIN; 808 809 nfs_invalidate_atime(inode); 810 nfs_refresh_inode(inode, &hdr->fattr); 811 return 0; 812 } 813 814 static void nfs3_proc_read_setup(struct nfs_pgio_header *hdr, 815 struct rpc_message *msg) 816 { 817 msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ]; 818 } 819 820 static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task, 821 struct nfs_pgio_header *hdr) 822 { 823 rpc_call_start(task); 824 return 0; 825 } 826 827 static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 828 { 829 struct inode *inode = hdr->inode; 830 831 if (hdr->pgio_done_cb != NULL) 832 return hdr->pgio_done_cb(task, hdr); 833 834 if (nfs3_async_handle_jukebox(task, inode)) 835 return -EAGAIN; 836 if (task->tk_status >= 0) 837 nfs_writeback_update_inode(hdr); 838 return 0; 839 } 840 841 static void nfs3_proc_write_setup(struct nfs_pgio_header *hdr, 842 struct rpc_message *msg) 843 { 844 msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE]; 845 } 846 847 static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 848 { 849 rpc_call_start(task); 850 } 851 852 static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 853 { 854 if (data->commit_done_cb != NULL) 855 return data->commit_done_cb(task, data); 856 857 if (nfs3_async_handle_jukebox(task, data->inode)) 858 return -EAGAIN; 859 nfs_refresh_inode(data->inode, data->res.fattr); 860 return 0; 861 } 862 863 static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg) 864 { 865 msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT]; 866 } 867 868 static int 869 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl) 870 { 871 struct inode *inode = file_inode(filp); 872 873 return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl); 874 } 875 876 static int nfs3_have_delegation(struct inode *inode, fmode_t flags) 877 { 878 return 0; 879 } 880 881 static int nfs3_return_delegation(struct inode *inode) 882 { 883 nfs_wb_all(inode); 884 return 0; 885 } 886 887 static const struct inode_operations nfs3_dir_inode_operations = { 888 .create = nfs_create, 889 .lookup = nfs_lookup, 890 .link = nfs_link, 891 .unlink = nfs_unlink, 892 .symlink = nfs_symlink, 893 .mkdir = nfs_mkdir, 894 .rmdir = nfs_rmdir, 895 .mknod = nfs_mknod, 896 .rename = nfs_rename, 897 .permission = nfs_permission, 898 .getattr = nfs_getattr, 899 .setattr = nfs_setattr, 900 #ifdef CONFIG_NFS_V3_ACL 901 .listxattr = nfs3_listxattr, 902 .getxattr = generic_getxattr, 903 .setxattr = generic_setxattr, 904 .removexattr = generic_removexattr, 905 .get_acl = nfs3_get_acl, 906 .set_acl = nfs3_set_acl, 907 #endif 908 }; 909 910 static const struct inode_operations nfs3_file_inode_operations = { 911 .permission = nfs_permission, 912 .getattr = nfs_getattr, 913 .setattr = nfs_setattr, 914 #ifdef CONFIG_NFS_V3_ACL 915 .listxattr = nfs3_listxattr, 916 .getxattr = generic_getxattr, 917 .setxattr = generic_setxattr, 918 .removexattr = generic_removexattr, 919 .get_acl = nfs3_get_acl, 920 .set_acl = nfs3_set_acl, 921 #endif 922 }; 923 924 const struct nfs_rpc_ops nfs_v3_clientops = { 925 .version = 3, /* protocol version */ 926 .dentry_ops = &nfs_dentry_operations, 927 .dir_inode_ops = &nfs3_dir_inode_operations, 928 .file_inode_ops = &nfs3_file_inode_operations, 929 .file_ops = &nfs_file_operations, 930 .getroot = nfs3_proc_get_root, 931 .submount = nfs_submount, 932 .try_mount = nfs_try_mount, 933 .getattr = nfs3_proc_getattr, 934 .setattr = nfs3_proc_setattr, 935 .lookup = nfs3_proc_lookup, 936 .access = nfs3_proc_access, 937 .readlink = nfs3_proc_readlink, 938 .create = nfs3_proc_create, 939 .remove = nfs3_proc_remove, 940 .unlink_setup = nfs3_proc_unlink_setup, 941 .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare, 942 .unlink_done = nfs3_proc_unlink_done, 943 .rename_setup = nfs3_proc_rename_setup, 944 .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare, 945 .rename_done = nfs3_proc_rename_done, 946 .link = nfs3_proc_link, 947 .symlink = nfs3_proc_symlink, 948 .mkdir = nfs3_proc_mkdir, 949 .rmdir = nfs3_proc_rmdir, 950 .readdir = nfs3_proc_readdir, 951 .mknod = nfs3_proc_mknod, 952 .statfs = nfs3_proc_statfs, 953 .fsinfo = nfs3_proc_fsinfo, 954 .pathconf = nfs3_proc_pathconf, 955 .decode_dirent = nfs3_decode_dirent, 956 .pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare, 957 .read_setup = nfs3_proc_read_setup, 958 .read_done = nfs3_read_done, 959 .write_setup = nfs3_proc_write_setup, 960 .write_done = nfs3_write_done, 961 .commit_setup = nfs3_proc_commit_setup, 962 .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare, 963 .commit_done = nfs3_commit_done, 964 .lock = nfs3_proc_lock, 965 .clear_acl_cache = forget_all_cached_acls, 966 .close_context = nfs_close_context, 967 .have_delegation = nfs3_have_delegation, 968 .return_delegation = nfs3_return_delegation, 969 .alloc_client = nfs_alloc_client, 970 .init_client = nfs_init_client, 971 .free_client = nfs_free_client, 972 .create_server = nfs3_create_server, 973 .clone_server = nfs3_clone_server, 974 }; 975