zfs_vnops.c revision 260763
1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21/* 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright (c) 2013 by Delphix. All rights reserved. 24 * Copyright 2013 Nexenta Systems, Inc. All rights reserved. 25 */ 26 27/* Portions Copyright 2007 Jeremy Teo */ 28/* Portions Copyright 2010 Robert Milkowski */ 29 30#include <sys/types.h> 31#include <sys/param.h> 32#include <sys/time.h> 33#include <sys/systm.h> 34#include <sys/sysmacros.h> 35#include <sys/resource.h> 36#include <sys/vfs.h> 37#include <sys/vm.h> 38#include <sys/vnode.h> 39#include <sys/file.h> 40#include <sys/stat.h> 41#include <sys/kmem.h> 42#include <sys/taskq.h> 43#include <sys/uio.h> 44#include <sys/atomic.h> 45#include <sys/namei.h> 46#include <sys/mman.h> 47#include <sys/cmn_err.h> 48#include <sys/errno.h> 49#include <sys/unistd.h> 50#include <sys/zfs_dir.h> 51#include <sys/zfs_ioctl.h> 52#include <sys/fs/zfs.h> 53#include <sys/dmu.h> 54#include <sys/dmu_objset.h> 55#include <sys/spa.h> 56#include <sys/txg.h> 57#include <sys/dbuf.h> 58#include <sys/zap.h> 59#include <sys/sa.h> 60#include <sys/dirent.h> 61#include <sys/policy.h> 62#include <sys/sunddi.h> 63#include <sys/filio.h> 64#include <sys/sid.h> 65#include <sys/zfs_ctldir.h> 66#include <sys/zfs_fuid.h> 67#include <sys/zfs_sa.h> 68#include <sys/dnlc.h> 69#include <sys/zfs_rlock.h> 70#include <sys/extdirent.h> 71#include <sys/kidmap.h> 72#include <sys/bio.h> 73#include <sys/buf.h> 74#include <sys/sf_buf.h> 75#include <sys/sched.h> 76#include <sys/acl.h> 77#include <vm/vm_param.h> 78#include <vm/vm_pageout.h> 79 80/* 81 * Programming rules. 82 * 83 * Each vnode op performs some logical unit of work. To do this, the ZPL must 84 * properly lock its in-core state, create a DMU transaction, do the work, 85 * record this work in the intent log (ZIL), commit the DMU transaction, 86 * and wait for the intent log to commit if it is a synchronous operation. 87 * Moreover, the vnode ops must work in both normal and log replay context. 88 * The ordering of events is important to avoid deadlocks and references 89 * to freed memory. The example below illustrates the following Big Rules: 90 * 91 * (1) A check must be made in each zfs thread for a mounted file system. 92 * This is done avoiding races using ZFS_ENTER(zfsvfs). 93 * A ZFS_EXIT(zfsvfs) is needed before all returns. Any znodes 94 * must be checked with ZFS_VERIFY_ZP(zp). Both of these macros 95 * can return EIO from the calling function. 96 * 97 * (2) VN_RELE() should always be the last thing except for zil_commit() 98 * (if necessary) and ZFS_EXIT(). This is for 3 reasons: 99 * First, if it's the last reference, the vnode/znode 100 * can be freed, so the zp may point to freed memory. Second, the last 101 * reference will call zfs_zinactive(), which may induce a lot of work -- 102 * pushing cached pages (which acquires range locks) and syncing out 103 * cached atime changes. Third, zfs_zinactive() may require a new tx, 104 * which could deadlock the system if you were already holding one. 105 * If you must call VN_RELE() within a tx then use VN_RELE_ASYNC(). 106 * 107 * (3) All range locks must be grabbed before calling dmu_tx_assign(), 108 * as they can span dmu_tx_assign() calls. 109 * 110 * (4) Always pass TXG_NOWAIT as the second argument to dmu_tx_assign(). 111 * This is critical because we don't want to block while holding locks. 112 * Note, in particular, that if a lock is sometimes acquired before 113 * the tx assigns, and sometimes after (e.g. z_lock), then failing to 114 * use a non-blocking assign can deadlock the system. The scenario: 115 * 116 * Thread A has grabbed a lock before calling dmu_tx_assign(). 117 * Thread B is in an already-assigned tx, and blocks for this lock. 118 * Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open() 119 * forever, because the previous txg can't quiesce until B's tx commits. 120 * 121 * If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT, 122 * then drop all locks, call dmu_tx_wait(), and try again. On subsequent 123 * calls to dmu_tx_assign(), pass TXG_WAITED rather than TXG_NOWAIT, 124 * to indicate that this operation has already called dmu_tx_wait(). 125 * This will ensure that we don't retry forever, waiting a short bit 126 * each time. 127 * 128 * (5) If the operation succeeded, generate the intent log entry for it 129 * before dropping locks. This ensures that the ordering of events 130 * in the intent log matches the order in which they actually occurred. 131 * During ZIL replay the zfs_log_* functions will update the sequence 132 * number to indicate the zil transaction has replayed. 133 * 134 * (6) At the end of each vnode op, the DMU tx must always commit, 135 * regardless of whether there were any errors. 136 * 137 * (7) After dropping all locks, invoke zil_commit(zilog, foid) 138 * to ensure that synchronous semantics are provided when necessary. 139 * 140 * In general, this is how things should be ordered in each vnode op: 141 * 142 * ZFS_ENTER(zfsvfs); // exit if unmounted 143 * top: 144 * zfs_dirent_lock(&dl, ...) // lock directory entry (may VN_HOLD()) 145 * rw_enter(...); // grab any other locks you need 146 * tx = dmu_tx_create(...); // get DMU tx 147 * dmu_tx_hold_*(); // hold each object you might modify 148 * error = dmu_tx_assign(tx, waited ? TXG_WAITED : TXG_NOWAIT); 149 * if (error) { 150 * rw_exit(...); // drop locks 151 * zfs_dirent_unlock(dl); // unlock directory entry 152 * VN_RELE(...); // release held vnodes 153 * if (error == ERESTART) { 154 * waited = B_TRUE; 155 * dmu_tx_wait(tx); 156 * dmu_tx_abort(tx); 157 * goto top; 158 * } 159 * dmu_tx_abort(tx); // abort DMU tx 160 * ZFS_EXIT(zfsvfs); // finished in zfs 161 * return (error); // really out of space 162 * } 163 * error = do_real_work(); // do whatever this VOP does 164 * if (error == 0) 165 * zfs_log_*(...); // on success, make ZIL entry 166 * dmu_tx_commit(tx); // commit DMU tx -- error or not 167 * rw_exit(...); // drop locks 168 * zfs_dirent_unlock(dl); // unlock directory entry 169 * VN_RELE(...); // release held vnodes 170 * zil_commit(zilog, foid); // synchronous when necessary 171 * ZFS_EXIT(zfsvfs); // finished in zfs 172 * return (error); // done, report error 173 */ 174 175/* ARGSUSED */ 176static int 177zfs_open(vnode_t **vpp, int flag, cred_t *cr, caller_context_t *ct) 178{ 179 znode_t *zp = VTOZ(*vpp); 180 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 181 182 ZFS_ENTER(zfsvfs); 183 ZFS_VERIFY_ZP(zp); 184 185 if ((flag & FWRITE) && (zp->z_pflags & ZFS_APPENDONLY) && 186 ((flag & FAPPEND) == 0)) { 187 ZFS_EXIT(zfsvfs); 188 return (SET_ERROR(EPERM)); 189 } 190 191 if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan && 192 ZTOV(zp)->v_type == VREG && 193 !(zp->z_pflags & ZFS_AV_QUARANTINED) && zp->z_size > 0) { 194 if (fs_vscan(*vpp, cr, 0) != 0) { 195 ZFS_EXIT(zfsvfs); 196 return (SET_ERROR(EACCES)); 197 } 198 } 199 200 /* Keep a count of the synchronous opens in the znode */ 201 if (flag & (FSYNC | FDSYNC)) 202 atomic_inc_32(&zp->z_sync_cnt); 203 204 ZFS_EXIT(zfsvfs); 205 return (0); 206} 207 208/* ARGSUSED */ 209static int 210zfs_close(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr, 211 caller_context_t *ct) 212{ 213 znode_t *zp = VTOZ(vp); 214 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 215 216 /* 217 * Clean up any locks held by this process on the vp. 218 */ 219 cleanlocks(vp, ddi_get_pid(), 0); 220 cleanshares(vp, ddi_get_pid()); 221 222 ZFS_ENTER(zfsvfs); 223 ZFS_VERIFY_ZP(zp); 224 225 /* Decrement the synchronous opens in the znode */ 226 if ((flag & (FSYNC | FDSYNC)) && (count == 1)) 227 atomic_dec_32(&zp->z_sync_cnt); 228 229 if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan && 230 ZTOV(zp)->v_type == VREG && 231 !(zp->z_pflags & ZFS_AV_QUARANTINED) && zp->z_size > 0) 232 VERIFY(fs_vscan(vp, cr, 1) == 0); 233 234 ZFS_EXIT(zfsvfs); 235 return (0); 236} 237 238/* 239 * Lseek support for finding holes (cmd == _FIO_SEEK_HOLE) and 240 * data (cmd == _FIO_SEEK_DATA). "off" is an in/out parameter. 241 */ 242static int 243zfs_holey(vnode_t *vp, u_long cmd, offset_t *off) 244{ 245 znode_t *zp = VTOZ(vp); 246 uint64_t noff = (uint64_t)*off; /* new offset */ 247 uint64_t file_sz; 248 int error; 249 boolean_t hole; 250 251 file_sz = zp->z_size; 252 if (noff >= file_sz) { 253 return (SET_ERROR(ENXIO)); 254 } 255 256 if (cmd == _FIO_SEEK_HOLE) 257 hole = B_TRUE; 258 else 259 hole = B_FALSE; 260 261 error = dmu_offset_next(zp->z_zfsvfs->z_os, zp->z_id, hole, &noff); 262 263 /* end of file? */ 264 if ((error == ESRCH) || (noff > file_sz)) { 265 /* 266 * Handle the virtual hole at the end of file. 267 */ 268 if (hole) { 269 *off = file_sz; 270 return (0); 271 } 272 return (SET_ERROR(ENXIO)); 273 } 274 275 if (noff < *off) 276 return (error); 277 *off = noff; 278 return (error); 279} 280 281/* ARGSUSED */ 282static int 283zfs_ioctl(vnode_t *vp, u_long com, intptr_t data, int flag, cred_t *cred, 284 int *rvalp, caller_context_t *ct) 285{ 286 offset_t off; 287 int error; 288 zfsvfs_t *zfsvfs; 289 znode_t *zp; 290 291 switch (com) { 292 case _FIOFFS: 293 return (0); 294 295 /* 296 * The following two ioctls are used by bfu. Faking out, 297 * necessary to avoid bfu errors. 298 */ 299 case _FIOGDIO: 300 case _FIOSDIO: 301 return (0); 302 303 case _FIO_SEEK_DATA: 304 case _FIO_SEEK_HOLE: 305#ifdef sun 306 if (ddi_copyin((void *)data, &off, sizeof (off), flag)) 307 return (SET_ERROR(EFAULT)); 308#else 309 off = *(offset_t *)data; 310#endif 311 zp = VTOZ(vp); 312 zfsvfs = zp->z_zfsvfs; 313 ZFS_ENTER(zfsvfs); 314 ZFS_VERIFY_ZP(zp); 315 316 /* offset parameter is in/out */ 317 error = zfs_holey(vp, com, &off); 318 ZFS_EXIT(zfsvfs); 319 if (error) 320 return (error); 321#ifdef sun 322 if (ddi_copyout(&off, (void *)data, sizeof (off), flag)) 323 return (SET_ERROR(EFAULT)); 324#else 325 *(offset_t *)data = off; 326#endif 327 return (0); 328 } 329 return (SET_ERROR(ENOTTY)); 330} 331 332static vm_page_t 333page_busy(vnode_t *vp, int64_t start, int64_t off, int64_t nbytes) 334{ 335 vm_object_t obj; 336 vm_page_t pp; 337 int64_t end; 338 339 /* 340 * At present vm_page_clear_dirty extends the cleared range to DEV_BSIZE 341 * aligned boundaries, if the range is not aligned. As a result a 342 * DEV_BSIZE subrange with partially dirty data may get marked as clean. 343 * It may happen that all DEV_BSIZE subranges are marked clean and thus 344 * the whole page would be considred clean despite have some dirty data. 345 * For this reason we should shrink the range to DEV_BSIZE aligned 346 * boundaries before calling vm_page_clear_dirty. 347 */ 348 end = rounddown2(off + nbytes, DEV_BSIZE); 349 off = roundup2(off, DEV_BSIZE); 350 nbytes = end - off; 351 352 obj = vp->v_object; 353 zfs_vmobject_assert_wlocked(obj); 354 355 for (;;) { 356 if ((pp = vm_page_lookup(obj, OFF_TO_IDX(start))) != NULL && 357 pp->valid) { 358 if (vm_page_xbusied(pp)) { 359 /* 360 * Reference the page before unlocking and 361 * sleeping so that the page daemon is less 362 * likely to reclaim it. 363 */ 364 vm_page_reference(pp); 365 vm_page_lock(pp); 366 zfs_vmobject_wunlock(obj); 367 vm_page_busy_sleep(pp, "zfsmwb"); 368 zfs_vmobject_wlock(obj); 369 continue; 370 } 371 vm_page_sbusy(pp); 372 } else if (pp == NULL) { 373 pp = vm_page_alloc(obj, OFF_TO_IDX(start), 374 VM_ALLOC_SYSTEM | VM_ALLOC_IFCACHED | 375 VM_ALLOC_SBUSY); 376 } else { 377 ASSERT(pp != NULL && !pp->valid); 378 pp = NULL; 379 } 380 381 if (pp != NULL) { 382 ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL); 383 vm_object_pip_add(obj, 1); 384 pmap_remove_write(pp); 385 if (nbytes != 0) 386 vm_page_clear_dirty(pp, off, nbytes); 387 } 388 break; 389 } 390 return (pp); 391} 392 393static void 394page_unbusy(vm_page_t pp) 395{ 396 397 vm_page_sunbusy(pp); 398 vm_object_pip_subtract(pp->object, 1); 399} 400 401static vm_page_t 402page_hold(vnode_t *vp, int64_t start) 403{ 404 vm_object_t obj; 405 vm_page_t pp; 406 407 obj = vp->v_object; 408 zfs_vmobject_assert_wlocked(obj); 409 410 for (;;) { 411 if ((pp = vm_page_lookup(obj, OFF_TO_IDX(start))) != NULL && 412 pp->valid) { 413 if (vm_page_xbusied(pp)) { 414 /* 415 * Reference the page before unlocking and 416 * sleeping so that the page daemon is less 417 * likely to reclaim it. 418 */ 419 vm_page_reference(pp); 420 vm_page_lock(pp); 421 zfs_vmobject_wunlock(obj); 422 vm_page_busy_sleep(pp, "zfsmwb"); 423 zfs_vmobject_wlock(obj); 424 continue; 425 } 426 427 ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL); 428 vm_page_lock(pp); 429 vm_page_hold(pp); 430 vm_page_unlock(pp); 431 432 } else 433 pp = NULL; 434 break; 435 } 436 return (pp); 437} 438 439static void 440page_unhold(vm_page_t pp) 441{ 442 443 vm_page_lock(pp); 444 vm_page_unhold(pp); 445 vm_page_unlock(pp); 446} 447 448static caddr_t 449zfs_map_page(vm_page_t pp, struct sf_buf **sfp) 450{ 451 452 *sfp = sf_buf_alloc(pp, 0); 453 return ((caddr_t)sf_buf_kva(*sfp)); 454} 455 456static void 457zfs_unmap_page(struct sf_buf *sf) 458{ 459 460 sf_buf_free(sf); 461} 462 463/* 464 * When a file is memory mapped, we must keep the IO data synchronized 465 * between the DMU cache and the memory mapped pages. What this means: 466 * 467 * On Write: If we find a memory mapped page, we write to *both* 468 * the page and the dmu buffer. 469 */ 470static void 471update_pages(vnode_t *vp, int64_t start, int len, objset_t *os, uint64_t oid, 472 int segflg, dmu_tx_t *tx) 473{ 474 vm_object_t obj; 475 struct sf_buf *sf; 476 caddr_t va; 477 int off; 478 479 ASSERT(vp->v_mount != NULL); 480 obj = vp->v_object; 481 ASSERT(obj != NULL); 482 483 off = start & PAGEOFFSET; 484 zfs_vmobject_wlock(obj); 485 for (start &= PAGEMASK; len > 0; start += PAGESIZE) { 486 vm_page_t pp; 487 int nbytes = imin(PAGESIZE - off, len); 488 489 if (segflg == UIO_NOCOPY) { 490 pp = vm_page_lookup(obj, OFF_TO_IDX(start)); 491 KASSERT(pp != NULL, 492 ("zfs update_pages: NULL page in putpages case")); 493 KASSERT(off == 0, 494 ("zfs update_pages: unaligned data in putpages case")); 495 KASSERT(pp->valid == VM_PAGE_BITS_ALL, 496 ("zfs update_pages: invalid page in putpages case")); 497 KASSERT(vm_page_sbusied(pp), 498 ("zfs update_pages: unbusy page in putpages case")); 499 KASSERT(!pmap_page_is_write_mapped(pp), 500 ("zfs update_pages: writable page in putpages case")); 501 zfs_vmobject_wunlock(obj); 502 503 va = zfs_map_page(pp, &sf); 504 (void) dmu_write(os, oid, start, nbytes, va, tx); 505 zfs_unmap_page(sf); 506 507 zfs_vmobject_wlock(obj); 508 vm_page_undirty(pp); 509 } else if ((pp = page_busy(vp, start, off, nbytes)) != NULL) { 510 zfs_vmobject_wunlock(obj); 511 512 va = zfs_map_page(pp, &sf); 513 (void) dmu_read(os, oid, start+off, nbytes, 514 va+off, DMU_READ_PREFETCH);; 515 zfs_unmap_page(sf); 516 517 zfs_vmobject_wlock(obj); 518 page_unbusy(pp); 519 } 520 len -= nbytes; 521 off = 0; 522 } 523 if (segflg != UIO_NOCOPY) 524 vm_object_pip_wakeupn(obj, 0); 525 zfs_vmobject_wunlock(obj); 526} 527 528/* 529 * Read with UIO_NOCOPY flag means that sendfile(2) requests 530 * ZFS to populate a range of page cache pages with data. 531 * 532 * NOTE: this function could be optimized to pre-allocate 533 * all pages in advance, drain exclusive busy on all of them, 534 * map them into contiguous KVA region and populate them 535 * in one single dmu_read() call. 536 */ 537static int 538mappedread_sf(vnode_t *vp, int nbytes, uio_t *uio) 539{ 540 znode_t *zp = VTOZ(vp); 541 objset_t *os = zp->z_zfsvfs->z_os; 542 struct sf_buf *sf; 543 vm_object_t obj; 544 vm_page_t pp; 545 int64_t start; 546 caddr_t va; 547 int len = nbytes; 548 int off; 549 int error = 0; 550 551 ASSERT(uio->uio_segflg == UIO_NOCOPY); 552 ASSERT(vp->v_mount != NULL); 553 obj = vp->v_object; 554 ASSERT(obj != NULL); 555 ASSERT((uio->uio_loffset & PAGEOFFSET) == 0); 556 557 zfs_vmobject_wlock(obj); 558 for (start = uio->uio_loffset; len > 0; start += PAGESIZE) { 559 int bytes = MIN(PAGESIZE, len); 560 561 pp = vm_page_grab(obj, OFF_TO_IDX(start), VM_ALLOC_SBUSY | 562 VM_ALLOC_NORMAL | VM_ALLOC_IGN_SBUSY); 563 if (pp->valid == 0) { 564 zfs_vmobject_wunlock(obj); 565 va = zfs_map_page(pp, &sf); 566 error = dmu_read(os, zp->z_id, start, bytes, va, 567 DMU_READ_PREFETCH); 568 if (bytes != PAGESIZE && error == 0) 569 bzero(va + bytes, PAGESIZE - bytes); 570 zfs_unmap_page(sf); 571 zfs_vmobject_wlock(obj); 572 vm_page_sunbusy(pp); 573 vm_page_lock(pp); 574 if (error) { 575 if (pp->wire_count == 0 && pp->valid == 0 && 576 !vm_page_busied(pp)) 577 vm_page_free(pp); 578 } else { 579 pp->valid = VM_PAGE_BITS_ALL; 580 vm_page_activate(pp); 581 } 582 vm_page_unlock(pp); 583 } else 584 vm_page_sunbusy(pp); 585 if (error) 586 break; 587 uio->uio_resid -= bytes; 588 uio->uio_offset += bytes; 589 len -= bytes; 590 } 591 zfs_vmobject_wunlock(obj); 592 return (error); 593} 594 595/* 596 * When a file is memory mapped, we must keep the IO data synchronized 597 * between the DMU cache and the memory mapped pages. What this means: 598 * 599 * On Read: We "read" preferentially from memory mapped pages, 600 * else we default from the dmu buffer. 601 * 602 * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when 603 * the file is memory mapped. 604 */ 605static int 606mappedread(vnode_t *vp, int nbytes, uio_t *uio) 607{ 608 znode_t *zp = VTOZ(vp); 609 objset_t *os = zp->z_zfsvfs->z_os; 610 vm_object_t obj; 611 int64_t start; 612 caddr_t va; 613 int len = nbytes; 614 int off; 615 int error = 0; 616 617 ASSERT(vp->v_mount != NULL); 618 obj = vp->v_object; 619 ASSERT(obj != NULL); 620 621 start = uio->uio_loffset; 622 off = start & PAGEOFFSET; 623 zfs_vmobject_wlock(obj); 624 for (start &= PAGEMASK; len > 0; start += PAGESIZE) { 625 vm_page_t pp; 626 uint64_t bytes = MIN(PAGESIZE - off, len); 627 628 if (pp = page_hold(vp, start)) { 629 struct sf_buf *sf; 630 caddr_t va; 631 632 zfs_vmobject_wunlock(obj); 633 va = zfs_map_page(pp, &sf); 634 error = uiomove(va + off, bytes, UIO_READ, uio); 635 zfs_unmap_page(sf); 636 zfs_vmobject_wlock(obj); 637 page_unhold(pp); 638 } else { 639 zfs_vmobject_wunlock(obj); 640 error = dmu_read_uio(os, zp->z_id, uio, bytes); 641 zfs_vmobject_wlock(obj); 642 } 643 len -= bytes; 644 off = 0; 645 if (error) 646 break; 647 } 648 zfs_vmobject_wunlock(obj); 649 return (error); 650} 651 652offset_t zfs_read_chunk_size = 1024 * 1024; /* Tunable */ 653 654/* 655 * Read bytes from specified file into supplied buffer. 656 * 657 * IN: vp - vnode of file to be read from. 658 * uio - structure supplying read location, range info, 659 * and return buffer. 660 * ioflag - SYNC flags; used to provide FRSYNC semantics. 661 * cr - credentials of caller. 662 * ct - caller context 663 * 664 * OUT: uio - updated offset and range, buffer filled. 665 * 666 * RETURN: 0 on success, error code on failure. 667 * 668 * Side Effects: 669 * vp - atime updated if byte count > 0 670 */ 671/* ARGSUSED */ 672static int 673zfs_read(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 674{ 675 znode_t *zp = VTOZ(vp); 676 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 677 objset_t *os; 678 ssize_t n, nbytes; 679 int error = 0; 680 rl_t *rl; 681 xuio_t *xuio = NULL; 682 683 ZFS_ENTER(zfsvfs); 684 ZFS_VERIFY_ZP(zp); 685 os = zfsvfs->z_os; 686 687 if (zp->z_pflags & ZFS_AV_QUARANTINED) { 688 ZFS_EXIT(zfsvfs); 689 return (SET_ERROR(EACCES)); 690 } 691 692 /* 693 * Validate file offset 694 */ 695 if (uio->uio_loffset < (offset_t)0) { 696 ZFS_EXIT(zfsvfs); 697 return (SET_ERROR(EINVAL)); 698 } 699 700 /* 701 * Fasttrack empty reads 702 */ 703 if (uio->uio_resid == 0) { 704 ZFS_EXIT(zfsvfs); 705 return (0); 706 } 707 708 /* 709 * Check for mandatory locks 710 */ 711 if (MANDMODE(zp->z_mode)) { 712 if (error = chklock(vp, FREAD, 713 uio->uio_loffset, uio->uio_resid, uio->uio_fmode, ct)) { 714 ZFS_EXIT(zfsvfs); 715 return (error); 716 } 717 } 718 719 /* 720 * If we're in FRSYNC mode, sync out this znode before reading it. 721 */ 722 if (zfsvfs->z_log && 723 (ioflag & FRSYNC || zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)) 724 zil_commit(zfsvfs->z_log, zp->z_id); 725 726 /* 727 * Lock the range against changes. 728 */ 729 rl = zfs_range_lock(zp, uio->uio_loffset, uio->uio_resid, RL_READER); 730 731 /* 732 * If we are reading past end-of-file we can skip 733 * to the end; but we might still need to set atime. 734 */ 735 if (uio->uio_loffset >= zp->z_size) { 736 error = 0; 737 goto out; 738 } 739 740 ASSERT(uio->uio_loffset < zp->z_size); 741 n = MIN(uio->uio_resid, zp->z_size - uio->uio_loffset); 742 743#ifdef sun 744 if ((uio->uio_extflg == UIO_XUIO) && 745 (((xuio_t *)uio)->xu_type == UIOTYPE_ZEROCOPY)) { 746 int nblk; 747 int blksz = zp->z_blksz; 748 uint64_t offset = uio->uio_loffset; 749 750 xuio = (xuio_t *)uio; 751 if ((ISP2(blksz))) { 752 nblk = (P2ROUNDUP(offset + n, blksz) - P2ALIGN(offset, 753 blksz)) / blksz; 754 } else { 755 ASSERT(offset + n <= blksz); 756 nblk = 1; 757 } 758 (void) dmu_xuio_init(xuio, nblk); 759 760 if (vn_has_cached_data(vp)) { 761 /* 762 * For simplicity, we always allocate a full buffer 763 * even if we only expect to read a portion of a block. 764 */ 765 while (--nblk >= 0) { 766 (void) dmu_xuio_add(xuio, 767 dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl), 768 blksz), 0, blksz); 769 } 770 } 771 } 772#endif /* sun */ 773 774 while (n > 0) { 775 nbytes = MIN(n, zfs_read_chunk_size - 776 P2PHASE(uio->uio_loffset, zfs_read_chunk_size)); 777 778#ifdef __FreeBSD__ 779 if (uio->uio_segflg == UIO_NOCOPY) 780 error = mappedread_sf(vp, nbytes, uio); 781 else 782#endif /* __FreeBSD__ */ 783 if (vn_has_cached_data(vp)) 784 error = mappedread(vp, nbytes, uio); 785 else 786 error = dmu_read_uio(os, zp->z_id, uio, nbytes); 787 if (error) { 788 /* convert checksum errors into IO errors */ 789 if (error == ECKSUM) 790 error = SET_ERROR(EIO); 791 break; 792 } 793 794 n -= nbytes; 795 } 796out: 797 zfs_range_unlock(rl); 798 799 ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 800 ZFS_EXIT(zfsvfs); 801 return (error); 802} 803 804/* 805 * Write the bytes to a file. 806 * 807 * IN: vp - vnode of file to be written to. 808 * uio - structure supplying write location, range info, 809 * and data buffer. 810 * ioflag - FAPPEND, FSYNC, and/or FDSYNC. FAPPEND is 811 * set if in append mode. 812 * cr - credentials of caller. 813 * ct - caller context (NFS/CIFS fem monitor only) 814 * 815 * OUT: uio - updated offset and range. 816 * 817 * RETURN: 0 on success, error code on failure. 818 * 819 * Timestamps: 820 * vp - ctime|mtime updated if byte count > 0 821 */ 822 823/* ARGSUSED */ 824static int 825zfs_write(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 826{ 827 znode_t *zp = VTOZ(vp); 828 rlim64_t limit = MAXOFFSET_T; 829 ssize_t start_resid = uio->uio_resid; 830 ssize_t tx_bytes; 831 uint64_t end_size; 832 dmu_tx_t *tx; 833 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 834 zilog_t *zilog; 835 offset_t woff; 836 ssize_t n, nbytes; 837 rl_t *rl; 838 int max_blksz = zfsvfs->z_max_blksz; 839 int error = 0; 840 arc_buf_t *abuf; 841 iovec_t *aiov = NULL; 842 xuio_t *xuio = NULL; 843 int i_iov = 0; 844 int iovcnt = uio->uio_iovcnt; 845 iovec_t *iovp = uio->uio_iov; 846 int write_eof; 847 int count = 0; 848 sa_bulk_attr_t bulk[4]; 849 uint64_t mtime[2], ctime[2]; 850 851 /* 852 * Fasttrack empty write 853 */ 854 n = start_resid; 855 if (n == 0) 856 return (0); 857 858 if (limit == RLIM64_INFINITY || limit > MAXOFFSET_T) 859 limit = MAXOFFSET_T; 860 861 ZFS_ENTER(zfsvfs); 862 ZFS_VERIFY_ZP(zp); 863 864 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16); 865 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16); 866 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs), NULL, 867 &zp->z_size, 8); 868 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL, 869 &zp->z_pflags, 8); 870 871 /* 872 * If immutable or not appending then return EPERM 873 */ 874 if ((zp->z_pflags & (ZFS_IMMUTABLE | ZFS_READONLY)) || 875 ((zp->z_pflags & ZFS_APPENDONLY) && !(ioflag & FAPPEND) && 876 (uio->uio_loffset < zp->z_size))) { 877 ZFS_EXIT(zfsvfs); 878 return (SET_ERROR(EPERM)); 879 } 880 881 zilog = zfsvfs->z_log; 882 883 /* 884 * Validate file offset 885 */ 886 woff = ioflag & FAPPEND ? zp->z_size : uio->uio_loffset; 887 if (woff < 0) { 888 ZFS_EXIT(zfsvfs); 889 return (SET_ERROR(EINVAL)); 890 } 891 892 /* 893 * Check for mandatory locks before calling zfs_range_lock() 894 * in order to prevent a deadlock with locks set via fcntl(). 895 */ 896 if (MANDMODE((mode_t)zp->z_mode) && 897 (error = chklock(vp, FWRITE, woff, n, uio->uio_fmode, ct)) != 0) { 898 ZFS_EXIT(zfsvfs); 899 return (error); 900 } 901 902#ifdef sun 903 /* 904 * Pre-fault the pages to ensure slow (eg NFS) pages 905 * don't hold up txg. 906 * Skip this if uio contains loaned arc_buf. 907 */ 908 if ((uio->uio_extflg == UIO_XUIO) && 909 (((xuio_t *)uio)->xu_type == UIOTYPE_ZEROCOPY)) 910 xuio = (xuio_t *)uio; 911 else 912 uio_prefaultpages(MIN(n, max_blksz), uio); 913#endif /* sun */ 914 915 /* 916 * If in append mode, set the io offset pointer to eof. 917 */ 918 if (ioflag & FAPPEND) { 919 /* 920 * Obtain an appending range lock to guarantee file append 921 * semantics. We reset the write offset once we have the lock. 922 */ 923 rl = zfs_range_lock(zp, 0, n, RL_APPEND); 924 woff = rl->r_off; 925 if (rl->r_len == UINT64_MAX) { 926 /* 927 * We overlocked the file because this write will cause 928 * the file block size to increase. 929 * Note that zp_size cannot change with this lock held. 930 */ 931 woff = zp->z_size; 932 } 933 uio->uio_loffset = woff; 934 } else { 935 /* 936 * Note that if the file block size will change as a result of 937 * this write, then this range lock will lock the entire file 938 * so that we can re-write the block safely. 939 */ 940 rl = zfs_range_lock(zp, woff, n, RL_WRITER); 941 } 942 943 if (vn_rlimit_fsize(vp, uio, uio->uio_td)) { 944 zfs_range_unlock(rl); 945 ZFS_EXIT(zfsvfs); 946 return (EFBIG); 947 } 948 949 if (woff >= limit) { 950 zfs_range_unlock(rl); 951 ZFS_EXIT(zfsvfs); 952 return (SET_ERROR(EFBIG)); 953 } 954 955 if ((woff + n) > limit || woff > (limit - n)) 956 n = limit - woff; 957 958 /* Will this write extend the file length? */ 959 write_eof = (woff + n > zp->z_size); 960 961 end_size = MAX(zp->z_size, woff + n); 962 963 /* 964 * Write the file in reasonable size chunks. Each chunk is written 965 * in a separate transaction; this keeps the intent log records small 966 * and allows us to do more fine-grained space accounting. 967 */ 968 while (n > 0) { 969 abuf = NULL; 970 woff = uio->uio_loffset; 971again: 972 if (zfs_owner_overquota(zfsvfs, zp, B_FALSE) || 973 zfs_owner_overquota(zfsvfs, zp, B_TRUE)) { 974 if (abuf != NULL) 975 dmu_return_arcbuf(abuf); 976 error = SET_ERROR(EDQUOT); 977 break; 978 } 979 980 if (xuio && abuf == NULL) { 981 ASSERT(i_iov < iovcnt); 982 aiov = &iovp[i_iov]; 983 abuf = dmu_xuio_arcbuf(xuio, i_iov); 984 dmu_xuio_clear(xuio, i_iov); 985 DTRACE_PROBE3(zfs_cp_write, int, i_iov, 986 iovec_t *, aiov, arc_buf_t *, abuf); 987 ASSERT((aiov->iov_base == abuf->b_data) || 988 ((char *)aiov->iov_base - (char *)abuf->b_data + 989 aiov->iov_len == arc_buf_size(abuf))); 990 i_iov++; 991 } else if (abuf == NULL && n >= max_blksz && 992 woff >= zp->z_size && 993 P2PHASE(woff, max_blksz) == 0 && 994 zp->z_blksz == max_blksz) { 995 /* 996 * This write covers a full block. "Borrow" a buffer 997 * from the dmu so that we can fill it before we enter 998 * a transaction. This avoids the possibility of 999 * holding up the transaction if the data copy hangs 1000 * up on a pagefault (e.g., from an NFS server mapping). 1001 */ 1002 size_t cbytes; 1003 1004 abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl), 1005 max_blksz); 1006 ASSERT(abuf != NULL); 1007 ASSERT(arc_buf_size(abuf) == max_blksz); 1008 if (error = uiocopy(abuf->b_data, max_blksz, 1009 UIO_WRITE, uio, &cbytes)) { 1010 dmu_return_arcbuf(abuf); 1011 break; 1012 } 1013 ASSERT(cbytes == max_blksz); 1014 } 1015 1016 /* 1017 * Start a transaction. 1018 */ 1019 tx = dmu_tx_create(zfsvfs->z_os); 1020 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); 1021 dmu_tx_hold_write(tx, zp->z_id, woff, MIN(n, max_blksz)); 1022 zfs_sa_upgrade_txholds(tx, zp); 1023 error = dmu_tx_assign(tx, TXG_NOWAIT); 1024 if (error) { 1025 if (error == ERESTART) { 1026 dmu_tx_wait(tx); 1027 dmu_tx_abort(tx); 1028 goto again; 1029 } 1030 dmu_tx_abort(tx); 1031 if (abuf != NULL) 1032 dmu_return_arcbuf(abuf); 1033 break; 1034 } 1035 1036 /* 1037 * If zfs_range_lock() over-locked we grow the blocksize 1038 * and then reduce the lock range. This will only happen 1039 * on the first iteration since zfs_range_reduce() will 1040 * shrink down r_len to the appropriate size. 1041 */ 1042 if (rl->r_len == UINT64_MAX) { 1043 uint64_t new_blksz; 1044 1045 if (zp->z_blksz > max_blksz) { 1046 ASSERT(!ISP2(zp->z_blksz)); 1047 new_blksz = MIN(end_size, SPA_MAXBLOCKSIZE); 1048 } else { 1049 new_blksz = MIN(end_size, max_blksz); 1050 } 1051 zfs_grow_blocksize(zp, new_blksz, tx); 1052 zfs_range_reduce(rl, woff, n); 1053 } 1054 1055 /* 1056 * XXX - should we really limit each write to z_max_blksz? 1057 * Perhaps we should use SPA_MAXBLOCKSIZE chunks? 1058 */ 1059 nbytes = MIN(n, max_blksz - P2PHASE(woff, max_blksz)); 1060 1061 if (woff + nbytes > zp->z_size) 1062 vnode_pager_setsize(vp, woff + nbytes); 1063 1064 if (abuf == NULL) { 1065 tx_bytes = uio->uio_resid; 1066 error = dmu_write_uio_dbuf(sa_get_db(zp->z_sa_hdl), 1067 uio, nbytes, tx); 1068 tx_bytes -= uio->uio_resid; 1069 } else { 1070 tx_bytes = nbytes; 1071 ASSERT(xuio == NULL || tx_bytes == aiov->iov_len); 1072 /* 1073 * If this is not a full block write, but we are 1074 * extending the file past EOF and this data starts 1075 * block-aligned, use assign_arcbuf(). Otherwise, 1076 * write via dmu_write(). 1077 */ 1078 if (tx_bytes < max_blksz && (!write_eof || 1079 aiov->iov_base != abuf->b_data)) { 1080 ASSERT(xuio); 1081 dmu_write(zfsvfs->z_os, zp->z_id, woff, 1082 aiov->iov_len, aiov->iov_base, tx); 1083 dmu_return_arcbuf(abuf); 1084 xuio_stat_wbuf_copied(); 1085 } else { 1086 ASSERT(xuio || tx_bytes == max_blksz); 1087 dmu_assign_arcbuf(sa_get_db(zp->z_sa_hdl), 1088 woff, abuf, tx); 1089 } 1090 ASSERT(tx_bytes <= uio->uio_resid); 1091 uioskip(uio, tx_bytes); 1092 } 1093 if (tx_bytes && vn_has_cached_data(vp)) { 1094 update_pages(vp, woff, tx_bytes, zfsvfs->z_os, 1095 zp->z_id, uio->uio_segflg, tx); 1096 } 1097 1098 /* 1099 * If we made no progress, we're done. If we made even 1100 * partial progress, update the znode and ZIL accordingly. 1101 */ 1102 if (tx_bytes == 0) { 1103 (void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs), 1104 (void *)&zp->z_size, sizeof (uint64_t), tx); 1105 dmu_tx_commit(tx); 1106 ASSERT(error != 0); 1107 break; 1108 } 1109 1110 /* 1111 * Clear Set-UID/Set-GID bits on successful write if not 1112 * privileged and at least one of the excute bits is set. 1113 * 1114 * It would be nice to to this after all writes have 1115 * been done, but that would still expose the ISUID/ISGID 1116 * to another app after the partial write is committed. 1117 * 1118 * Note: we don't call zfs_fuid_map_id() here because 1119 * user 0 is not an ephemeral uid. 1120 */ 1121 mutex_enter(&zp->z_acl_lock); 1122 if ((zp->z_mode & (S_IXUSR | (S_IXUSR >> 3) | 1123 (S_IXUSR >> 6))) != 0 && 1124 (zp->z_mode & (S_ISUID | S_ISGID)) != 0 && 1125 secpolicy_vnode_setid_retain(vp, cr, 1126 (zp->z_mode & S_ISUID) != 0 && zp->z_uid == 0) != 0) { 1127 uint64_t newmode; 1128 zp->z_mode &= ~(S_ISUID | S_ISGID); 1129 newmode = zp->z_mode; 1130 (void) sa_update(zp->z_sa_hdl, SA_ZPL_MODE(zfsvfs), 1131 (void *)&newmode, sizeof (uint64_t), tx); 1132 } 1133 mutex_exit(&zp->z_acl_lock); 1134 1135 zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime, 1136 B_TRUE); 1137 1138 /* 1139 * Update the file size (zp_size) if it has changed; 1140 * account for possible concurrent updates. 1141 */ 1142 while ((end_size = zp->z_size) < uio->uio_loffset) { 1143 (void) atomic_cas_64(&zp->z_size, end_size, 1144 uio->uio_loffset); 1145 ASSERT(error == 0); 1146 } 1147 /* 1148 * If we are replaying and eof is non zero then force 1149 * the file size to the specified eof. Note, there's no 1150 * concurrency during replay. 1151 */ 1152 if (zfsvfs->z_replay && zfsvfs->z_replay_eof != 0) 1153 zp->z_size = zfsvfs->z_replay_eof; 1154 1155 error = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx); 1156 1157 zfs_log_write(zilog, tx, TX_WRITE, zp, woff, tx_bytes, ioflag); 1158 dmu_tx_commit(tx); 1159 1160 if (error != 0) 1161 break; 1162 ASSERT(tx_bytes == nbytes); 1163 n -= nbytes; 1164 1165#ifdef sun 1166 if (!xuio && n > 0) 1167 uio_prefaultpages(MIN(n, max_blksz), uio); 1168#endif /* sun */ 1169 } 1170 1171 zfs_range_unlock(rl); 1172 1173 /* 1174 * If we're in replay mode, or we made no progress, return error. 1175 * Otherwise, it's at least a partial write, so it's successful. 1176 */ 1177 if (zfsvfs->z_replay || uio->uio_resid == start_resid) { 1178 ZFS_EXIT(zfsvfs); 1179 return (error); 1180 } 1181 1182 if (ioflag & (FSYNC | FDSYNC) || 1183 zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 1184 zil_commit(zilog, zp->z_id); 1185 1186 ZFS_EXIT(zfsvfs); 1187 return (0); 1188} 1189 1190void 1191zfs_get_done(zgd_t *zgd, int error) 1192{ 1193 znode_t *zp = zgd->zgd_private; 1194 objset_t *os = zp->z_zfsvfs->z_os; 1195 1196 if (zgd->zgd_db) 1197 dmu_buf_rele(zgd->zgd_db, zgd); 1198 1199 zfs_range_unlock(zgd->zgd_rl); 1200 1201 /* 1202 * Release the vnode asynchronously as we currently have the 1203 * txg stopped from syncing. 1204 */ 1205 VN_RELE_ASYNC(ZTOV(zp), dsl_pool_vnrele_taskq(dmu_objset_pool(os))); 1206 1207 if (error == 0 && zgd->zgd_bp) 1208 zil_add_block(zgd->zgd_zilog, zgd->zgd_bp); 1209 1210 kmem_free(zgd, sizeof (zgd_t)); 1211} 1212 1213#ifdef DEBUG 1214static int zil_fault_io = 0; 1215#endif 1216 1217/* 1218 * Get data to generate a TX_WRITE intent log record. 1219 */ 1220int 1221zfs_get_data(void *arg, lr_write_t *lr, char *buf, zio_t *zio) 1222{ 1223 zfsvfs_t *zfsvfs = arg; 1224 objset_t *os = zfsvfs->z_os; 1225 znode_t *zp; 1226 uint64_t object = lr->lr_foid; 1227 uint64_t offset = lr->lr_offset; 1228 uint64_t size = lr->lr_length; 1229 blkptr_t *bp = &lr->lr_blkptr; 1230 dmu_buf_t *db; 1231 zgd_t *zgd; 1232 int error = 0; 1233 1234 ASSERT(zio != NULL); 1235 ASSERT(size != 0); 1236 1237 /* 1238 * Nothing to do if the file has been removed 1239 */ 1240 if (zfs_zget(zfsvfs, object, &zp) != 0) 1241 return (SET_ERROR(ENOENT)); 1242 if (zp->z_unlinked) { 1243 /* 1244 * Release the vnode asynchronously as we currently have the 1245 * txg stopped from syncing. 1246 */ 1247 VN_RELE_ASYNC(ZTOV(zp), 1248 dsl_pool_vnrele_taskq(dmu_objset_pool(os))); 1249 return (SET_ERROR(ENOENT)); 1250 } 1251 1252 zgd = (zgd_t *)kmem_zalloc(sizeof (zgd_t), KM_SLEEP); 1253 zgd->zgd_zilog = zfsvfs->z_log; 1254 zgd->zgd_private = zp; 1255 1256 /* 1257 * Write records come in two flavors: immediate and indirect. 1258 * For small writes it's cheaper to store the data with the 1259 * log record (immediate); for large writes it's cheaper to 1260 * sync the data and get a pointer to it (indirect) so that 1261 * we don't have to write the data twice. 1262 */ 1263 if (buf != NULL) { /* immediate write */ 1264 zgd->zgd_rl = zfs_range_lock(zp, offset, size, RL_READER); 1265 /* test for truncation needs to be done while range locked */ 1266 if (offset >= zp->z_size) { 1267 error = SET_ERROR(ENOENT); 1268 } else { 1269 error = dmu_read(os, object, offset, size, buf, 1270 DMU_READ_NO_PREFETCH); 1271 } 1272 ASSERT(error == 0 || error == ENOENT); 1273 } else { /* indirect write */ 1274 /* 1275 * Have to lock the whole block to ensure when it's 1276 * written out and it's checksum is being calculated 1277 * that no one can change the data. We need to re-check 1278 * blocksize after we get the lock in case it's changed! 1279 */ 1280 for (;;) { 1281 uint64_t blkoff; 1282 size = zp->z_blksz; 1283 blkoff = ISP2(size) ? P2PHASE(offset, size) : offset; 1284 offset -= blkoff; 1285 zgd->zgd_rl = zfs_range_lock(zp, offset, size, 1286 RL_READER); 1287 if (zp->z_blksz == size) 1288 break; 1289 offset += blkoff; 1290 zfs_range_unlock(zgd->zgd_rl); 1291 } 1292 /* test for truncation needs to be done while range locked */ 1293 if (lr->lr_offset >= zp->z_size) 1294 error = SET_ERROR(ENOENT); 1295#ifdef DEBUG 1296 if (zil_fault_io) { 1297 error = SET_ERROR(EIO); 1298 zil_fault_io = 0; 1299 } 1300#endif 1301 if (error == 0) 1302 error = dmu_buf_hold(os, object, offset, zgd, &db, 1303 DMU_READ_NO_PREFETCH); 1304 1305 if (error == 0) { 1306 blkptr_t *obp = dmu_buf_get_blkptr(db); 1307 if (obp) { 1308 ASSERT(BP_IS_HOLE(bp)); 1309 *bp = *obp; 1310 } 1311 1312 zgd->zgd_db = db; 1313 zgd->zgd_bp = bp; 1314 1315 ASSERT(db->db_offset == offset); 1316 ASSERT(db->db_size == size); 1317 1318 error = dmu_sync(zio, lr->lr_common.lrc_txg, 1319 zfs_get_done, zgd); 1320 ASSERT(error || lr->lr_length <= zp->z_blksz); 1321 1322 /* 1323 * On success, we need to wait for the write I/O 1324 * initiated by dmu_sync() to complete before we can 1325 * release this dbuf. We will finish everything up 1326 * in the zfs_get_done() callback. 1327 */ 1328 if (error == 0) 1329 return (0); 1330 1331 if (error == EALREADY) { 1332 lr->lr_common.lrc_txtype = TX_WRITE2; 1333 error = 0; 1334 } 1335 } 1336 } 1337 1338 zfs_get_done(zgd, error); 1339 1340 return (error); 1341} 1342 1343/*ARGSUSED*/ 1344static int 1345zfs_access(vnode_t *vp, int mode, int flag, cred_t *cr, 1346 caller_context_t *ct) 1347{ 1348 znode_t *zp = VTOZ(vp); 1349 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 1350 int error; 1351 1352 ZFS_ENTER(zfsvfs); 1353 ZFS_VERIFY_ZP(zp); 1354 1355 if (flag & V_ACE_MASK) 1356 error = zfs_zaccess(zp, mode, flag, B_FALSE, cr); 1357 else 1358 error = zfs_zaccess_rwx(zp, mode, flag, cr); 1359 1360 ZFS_EXIT(zfsvfs); 1361 return (error); 1362} 1363 1364/* 1365 * If vnode is for a device return a specfs vnode instead. 1366 */ 1367static int 1368specvp_check(vnode_t **vpp, cred_t *cr) 1369{ 1370 int error = 0; 1371 1372 if (IS_DEVVP(*vpp)) { 1373 struct vnode *svp; 1374 1375 svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 1376 VN_RELE(*vpp); 1377 if (svp == NULL) 1378 error = SET_ERROR(ENOSYS); 1379 *vpp = svp; 1380 } 1381 return (error); 1382} 1383 1384 1385/* 1386 * Lookup an entry in a directory, or an extended attribute directory. 1387 * If it exists, return a held vnode reference for it. 1388 * 1389 * IN: dvp - vnode of directory to search. 1390 * nm - name of entry to lookup. 1391 * pnp - full pathname to lookup [UNUSED]. 1392 * flags - LOOKUP_XATTR set if looking for an attribute. 1393 * rdir - root directory vnode [UNUSED]. 1394 * cr - credentials of caller. 1395 * ct - caller context 1396 * direntflags - directory lookup flags 1397 * realpnp - returned pathname. 1398 * 1399 * OUT: vpp - vnode of located entry, NULL if not found. 1400 * 1401 * RETURN: 0 on success, error code on failure. 1402 * 1403 * Timestamps: 1404 * NA 1405 */ 1406/* ARGSUSED */ 1407static int 1408zfs_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, struct componentname *cnp, 1409 int nameiop, cred_t *cr, kthread_t *td, int flags) 1410{ 1411 znode_t *zdp = VTOZ(dvp); 1412 zfsvfs_t *zfsvfs = zdp->z_zfsvfs; 1413 int error = 0; 1414 int *direntflags = NULL; 1415 void *realpnp = NULL; 1416 1417 /* fast path */ 1418 if (!(flags & (LOOKUP_XATTR | FIGNORECASE))) { 1419 1420 if (dvp->v_type != VDIR) { 1421 return (SET_ERROR(ENOTDIR)); 1422 } else if (zdp->z_sa_hdl == NULL) { 1423 return (SET_ERROR(EIO)); 1424 } 1425 1426 if (nm[0] == 0 || (nm[0] == '.' && nm[1] == '\0')) { 1427 error = zfs_fastaccesschk_execute(zdp, cr); 1428 if (!error) { 1429 *vpp = dvp; 1430 VN_HOLD(*vpp); 1431 return (0); 1432 } 1433 return (error); 1434 } else { 1435 vnode_t *tvp = dnlc_lookup(dvp, nm); 1436 1437 if (tvp) { 1438 error = zfs_fastaccesschk_execute(zdp, cr); 1439 if (error) { 1440 VN_RELE(tvp); 1441 return (error); 1442 } 1443 if (tvp == DNLC_NO_VNODE) { 1444 VN_RELE(tvp); 1445 return (SET_ERROR(ENOENT)); 1446 } else { 1447 *vpp = tvp; 1448 return (specvp_check(vpp, cr)); 1449 } 1450 } 1451 } 1452 } 1453 1454 DTRACE_PROBE2(zfs__fastpath__lookup__miss, vnode_t *, dvp, char *, nm); 1455 1456 ZFS_ENTER(zfsvfs); 1457 ZFS_VERIFY_ZP(zdp); 1458 1459 *vpp = NULL; 1460 1461 if (flags & LOOKUP_XATTR) { 1462#ifdef TODO 1463 /* 1464 * If the xattr property is off, refuse the lookup request. 1465 */ 1466 if (!(zfsvfs->z_vfs->vfs_flag & VFS_XATTR)) { 1467 ZFS_EXIT(zfsvfs); 1468 return (SET_ERROR(EINVAL)); 1469 } 1470#endif 1471 1472 /* 1473 * We don't allow recursive attributes.. 1474 * Maybe someday we will. 1475 */ 1476 if (zdp->z_pflags & ZFS_XATTR) { 1477 ZFS_EXIT(zfsvfs); 1478 return (SET_ERROR(EINVAL)); 1479 } 1480 1481 if (error = zfs_get_xattrdir(VTOZ(dvp), vpp, cr, flags)) { 1482 ZFS_EXIT(zfsvfs); 1483 return (error); 1484 } 1485 1486 /* 1487 * Do we have permission to get into attribute directory? 1488 */ 1489 1490 if (error = zfs_zaccess(VTOZ(*vpp), ACE_EXECUTE, 0, 1491 B_FALSE, cr)) { 1492 VN_RELE(*vpp); 1493 *vpp = NULL; 1494 } 1495 1496 ZFS_EXIT(zfsvfs); 1497 return (error); 1498 } 1499 1500 if (dvp->v_type != VDIR) { 1501 ZFS_EXIT(zfsvfs); 1502 return (SET_ERROR(ENOTDIR)); 1503 } 1504 1505 /* 1506 * Check accessibility of directory. 1507 */ 1508 1509 if (error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr)) { 1510 ZFS_EXIT(zfsvfs); 1511 return (error); 1512 } 1513 1514 if (zfsvfs->z_utf8 && u8_validate(nm, strlen(nm), 1515 NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1516 ZFS_EXIT(zfsvfs); 1517 return (SET_ERROR(EILSEQ)); 1518 } 1519 1520 error = zfs_dirlook(zdp, nm, vpp, flags, direntflags, realpnp); 1521 if (error == 0) 1522 error = specvp_check(vpp, cr); 1523 1524 /* Translate errors and add SAVENAME when needed. */ 1525 if (cnp->cn_flags & ISLASTCN) { 1526 switch (nameiop) { 1527 case CREATE: 1528 case RENAME: 1529 if (error == ENOENT) { 1530 error = EJUSTRETURN; 1531 cnp->cn_flags |= SAVENAME; 1532 break; 1533 } 1534 /* FALLTHROUGH */ 1535 case DELETE: 1536 if (error == 0) 1537 cnp->cn_flags |= SAVENAME; 1538 break; 1539 } 1540 } 1541 if (error == 0 && (nm[0] != '.' || nm[1] != '\0')) { 1542 int ltype = 0; 1543 1544 if (cnp->cn_flags & ISDOTDOT) { 1545 ltype = VOP_ISLOCKED(dvp); 1546 VOP_UNLOCK(dvp, 0); 1547 } 1548 ZFS_EXIT(zfsvfs); 1549 error = vn_lock(*vpp, cnp->cn_lkflags); 1550 if (cnp->cn_flags & ISDOTDOT) 1551 vn_lock(dvp, ltype | LK_RETRY); 1552 if (error != 0) { 1553 VN_RELE(*vpp); 1554 *vpp = NULL; 1555 return (error); 1556 } 1557 } else { 1558 ZFS_EXIT(zfsvfs); 1559 } 1560 1561#ifdef FREEBSD_NAMECACHE 1562 /* 1563 * Insert name into cache (as non-existent) if appropriate. 1564 */ 1565 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && nameiop != CREATE) 1566 cache_enter(dvp, *vpp, cnp); 1567 /* 1568 * Insert name into cache if appropriate. 1569 */ 1570 if (error == 0 && (cnp->cn_flags & MAKEENTRY)) { 1571 if (!(cnp->cn_flags & ISLASTCN) || 1572 (nameiop != DELETE && nameiop != RENAME)) { 1573 cache_enter(dvp, *vpp, cnp); 1574 } 1575 } 1576#endif 1577 1578 return (error); 1579} 1580 1581/* 1582 * Attempt to create a new entry in a directory. If the entry 1583 * already exists, truncate the file if permissible, else return 1584 * an error. Return the vp of the created or trunc'd file. 1585 * 1586 * IN: dvp - vnode of directory to put new file entry in. 1587 * name - name of new file entry. 1588 * vap - attributes of new file. 1589 * excl - flag indicating exclusive or non-exclusive mode. 1590 * mode - mode to open file with. 1591 * cr - credentials of caller. 1592 * flag - large file flag [UNUSED]. 1593 * ct - caller context 1594 * vsecp - ACL to be set 1595 * 1596 * OUT: vpp - vnode of created or trunc'd entry. 1597 * 1598 * RETURN: 0 on success, error code on failure. 1599 * 1600 * Timestamps: 1601 * dvp - ctime|mtime updated if new entry created 1602 * vp - ctime|mtime always, atime if new 1603 */ 1604 1605/* ARGSUSED */ 1606static int 1607zfs_create(vnode_t *dvp, char *name, vattr_t *vap, int excl, int mode, 1608 vnode_t **vpp, cred_t *cr, kthread_t *td) 1609{ 1610 znode_t *zp, *dzp = VTOZ(dvp); 1611 zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1612 zilog_t *zilog; 1613 objset_t *os; 1614 zfs_dirlock_t *dl; 1615 dmu_tx_t *tx; 1616 int error; 1617 ksid_t *ksid; 1618 uid_t uid; 1619 gid_t gid = crgetgid(cr); 1620 zfs_acl_ids_t acl_ids; 1621 boolean_t fuid_dirtied; 1622 boolean_t have_acl = B_FALSE; 1623 boolean_t waited = B_FALSE; 1624 void *vsecp = NULL; 1625 int flag = 0; 1626 1627 /* 1628 * If we have an ephemeral id, ACL, or XVATTR then 1629 * make sure file system is at proper version 1630 */ 1631 1632 ksid = crgetsid(cr, KSID_OWNER); 1633 if (ksid) 1634 uid = ksid_getid(ksid); 1635 else 1636 uid = crgetuid(cr); 1637 1638 if (zfsvfs->z_use_fuids == B_FALSE && 1639 (vsecp || (vap->va_mask & AT_XVATTR) || 1640 IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid))) 1641 return (SET_ERROR(EINVAL)); 1642 1643 ZFS_ENTER(zfsvfs); 1644 ZFS_VERIFY_ZP(dzp); 1645 os = zfsvfs->z_os; 1646 zilog = zfsvfs->z_log; 1647 1648 if (zfsvfs->z_utf8 && u8_validate(name, strlen(name), 1649 NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1650 ZFS_EXIT(zfsvfs); 1651 return (SET_ERROR(EILSEQ)); 1652 } 1653 1654 if (vap->va_mask & AT_XVATTR) { 1655 if ((error = secpolicy_xvattr(dvp, (xvattr_t *)vap, 1656 crgetuid(cr), cr, vap->va_type)) != 0) { 1657 ZFS_EXIT(zfsvfs); 1658 return (error); 1659 } 1660 } 1661top: 1662 *vpp = NULL; 1663 1664 if ((vap->va_mode & S_ISVTX) && secpolicy_vnode_stky_modify(cr)) 1665 vap->va_mode &= ~S_ISVTX; 1666 1667 if (*name == '\0') { 1668 /* 1669 * Null component name refers to the directory itself. 1670 */ 1671 VN_HOLD(dvp); 1672 zp = dzp; 1673 dl = NULL; 1674 error = 0; 1675 } else { 1676 /* possible VN_HOLD(zp) */ 1677 int zflg = 0; 1678 1679 if (flag & FIGNORECASE) 1680 zflg |= ZCILOOK; 1681 1682 error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1683 NULL, NULL); 1684 if (error) { 1685 if (have_acl) 1686 zfs_acl_ids_free(&acl_ids); 1687 if (strcmp(name, "..") == 0) 1688 error = SET_ERROR(EISDIR); 1689 ZFS_EXIT(zfsvfs); 1690 return (error); 1691 } 1692 } 1693 1694 if (zp == NULL) { 1695 uint64_t txtype; 1696 1697 /* 1698 * Create a new file object and update the directory 1699 * to reference it. 1700 */ 1701 if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 1702 if (have_acl) 1703 zfs_acl_ids_free(&acl_ids); 1704 goto out; 1705 } 1706 1707 /* 1708 * We only support the creation of regular files in 1709 * extended attribute directories. 1710 */ 1711 1712 if ((dzp->z_pflags & ZFS_XATTR) && 1713 (vap->va_type != VREG)) { 1714 if (have_acl) 1715 zfs_acl_ids_free(&acl_ids); 1716 error = SET_ERROR(EINVAL); 1717 goto out; 1718 } 1719 1720 if (!have_acl && (error = zfs_acl_ids_create(dzp, 0, vap, 1721 cr, vsecp, &acl_ids)) != 0) 1722 goto out; 1723 have_acl = B_TRUE; 1724 1725 if (zfs_acl_ids_overquota(zfsvfs, &acl_ids)) { 1726 zfs_acl_ids_free(&acl_ids); 1727 error = SET_ERROR(EDQUOT); 1728 goto out; 1729 } 1730 1731 tx = dmu_tx_create(os); 1732 1733 dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes + 1734 ZFS_SA_BASE_ATTR_SIZE); 1735 1736 fuid_dirtied = zfsvfs->z_fuid_dirty; 1737 if (fuid_dirtied) 1738 zfs_fuid_txhold(zfsvfs, tx); 1739 dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 1740 dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE); 1741 if (!zfsvfs->z_use_sa && 1742 acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) { 1743 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 1744 0, acl_ids.z_aclp->z_acl_bytes); 1745 } 1746 error = dmu_tx_assign(tx, waited ? TXG_WAITED : TXG_NOWAIT); 1747 if (error) { 1748 zfs_dirent_unlock(dl); 1749 if (error == ERESTART) { 1750 waited = B_TRUE; 1751 dmu_tx_wait(tx); 1752 dmu_tx_abort(tx); 1753 goto top; 1754 } 1755 zfs_acl_ids_free(&acl_ids); 1756 dmu_tx_abort(tx); 1757 ZFS_EXIT(zfsvfs); 1758 return (error); 1759 } 1760 zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids); 1761 1762 if (fuid_dirtied) 1763 zfs_fuid_sync(zfsvfs, tx); 1764 1765 (void) zfs_link_create(dl, zp, tx, ZNEW); 1766 txtype = zfs_log_create_txtype(Z_FILE, vsecp, vap); 1767 if (flag & FIGNORECASE) 1768 txtype |= TX_CI; 1769 zfs_log_create(zilog, tx, txtype, dzp, zp, name, 1770 vsecp, acl_ids.z_fuidp, vap); 1771 zfs_acl_ids_free(&acl_ids); 1772 dmu_tx_commit(tx); 1773 } else { 1774 int aflags = (flag & FAPPEND) ? V_APPEND : 0; 1775 1776 if (have_acl) 1777 zfs_acl_ids_free(&acl_ids); 1778 have_acl = B_FALSE; 1779 1780 /* 1781 * A directory entry already exists for this name. 1782 */ 1783 /* 1784 * Can't truncate an existing file if in exclusive mode. 1785 */ 1786 if (excl == EXCL) { 1787 error = SET_ERROR(EEXIST); 1788 goto out; 1789 } 1790 /* 1791 * Can't open a directory for writing. 1792 */ 1793 if ((ZTOV(zp)->v_type == VDIR) && (mode & S_IWRITE)) { 1794 error = SET_ERROR(EISDIR); 1795 goto out; 1796 } 1797 /* 1798 * Verify requested access to file. 1799 */ 1800 if (mode && (error = zfs_zaccess_rwx(zp, mode, aflags, cr))) { 1801 goto out; 1802 } 1803 1804 mutex_enter(&dzp->z_lock); 1805 dzp->z_seq++; 1806 mutex_exit(&dzp->z_lock); 1807 1808 /* 1809 * Truncate regular files if requested. 1810 */ 1811 if ((ZTOV(zp)->v_type == VREG) && 1812 (vap->va_mask & AT_SIZE) && (vap->va_size == 0)) { 1813 /* we can't hold any locks when calling zfs_freesp() */ 1814 zfs_dirent_unlock(dl); 1815 dl = NULL; 1816 error = zfs_freesp(zp, 0, 0, mode, TRUE); 1817 if (error == 0) { 1818 vnevent_create(ZTOV(zp), ct); 1819 } 1820 } 1821 } 1822out: 1823 if (dl) 1824 zfs_dirent_unlock(dl); 1825 1826 if (error) { 1827 if (zp) 1828 VN_RELE(ZTOV(zp)); 1829 } else { 1830 *vpp = ZTOV(zp); 1831 error = specvp_check(vpp, cr); 1832 } 1833 1834 if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 1835 zil_commit(zilog, 0); 1836 1837 ZFS_EXIT(zfsvfs); 1838 return (error); 1839} 1840 1841/* 1842 * Remove an entry from a directory. 1843 * 1844 * IN: dvp - vnode of directory to remove entry from. 1845 * name - name of entry to remove. 1846 * cr - credentials of caller. 1847 * ct - caller context 1848 * flags - case flags 1849 * 1850 * RETURN: 0 on success, error code on failure. 1851 * 1852 * Timestamps: 1853 * dvp - ctime|mtime 1854 * vp - ctime (if nlink > 0) 1855 */ 1856 1857uint64_t null_xattr = 0; 1858 1859/*ARGSUSED*/ 1860static int 1861zfs_remove(vnode_t *dvp, char *name, cred_t *cr, caller_context_t *ct, 1862 int flags) 1863{ 1864 znode_t *zp, *dzp = VTOZ(dvp); 1865 znode_t *xzp; 1866 vnode_t *vp; 1867 zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1868 zilog_t *zilog; 1869 uint64_t acl_obj, xattr_obj; 1870 uint64_t xattr_obj_unlinked = 0; 1871 uint64_t obj = 0; 1872 zfs_dirlock_t *dl; 1873 dmu_tx_t *tx; 1874 boolean_t may_delete_now, delete_now = FALSE; 1875 boolean_t unlinked, toobig = FALSE; 1876 uint64_t txtype; 1877 pathname_t *realnmp = NULL; 1878 pathname_t realnm; 1879 int error; 1880 int zflg = ZEXISTS; 1881 boolean_t waited = B_FALSE; 1882 1883 ZFS_ENTER(zfsvfs); 1884 ZFS_VERIFY_ZP(dzp); 1885 zilog = zfsvfs->z_log; 1886 1887 if (flags & FIGNORECASE) { 1888 zflg |= ZCILOOK; 1889 pn_alloc(&realnm); 1890 realnmp = &realnm; 1891 } 1892 1893top: 1894 xattr_obj = 0; 1895 xzp = NULL; 1896 /* 1897 * Attempt to lock directory; fail if entry doesn't exist. 1898 */ 1899 if (error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1900 NULL, realnmp)) { 1901 if (realnmp) 1902 pn_free(realnmp); 1903 ZFS_EXIT(zfsvfs); 1904 return (error); 1905 } 1906 1907 vp = ZTOV(zp); 1908 1909 if (error = zfs_zaccess_delete(dzp, zp, cr)) { 1910 goto out; 1911 } 1912 1913 /* 1914 * Need to use rmdir for removing directories. 1915 */ 1916 if (vp->v_type == VDIR) { 1917 error = SET_ERROR(EPERM); 1918 goto out; 1919 } 1920 1921 vnevent_remove(vp, dvp, name, ct); 1922 1923 if (realnmp) 1924 dnlc_remove(dvp, realnmp->pn_buf); 1925 else 1926 dnlc_remove(dvp, name); 1927 1928 VI_LOCK(vp); 1929 may_delete_now = vp->v_count == 1 && !vn_has_cached_data(vp); 1930 VI_UNLOCK(vp); 1931 1932 /* 1933 * We may delete the znode now, or we may put it in the unlinked set; 1934 * it depends on whether we're the last link, and on whether there are 1935 * other holds on the vnode. So we dmu_tx_hold() the right things to 1936 * allow for either case. 1937 */ 1938 obj = zp->z_id; 1939 tx = dmu_tx_create(zfsvfs->z_os); 1940 dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); 1941 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); 1942 zfs_sa_upgrade_txholds(tx, zp); 1943 zfs_sa_upgrade_txholds(tx, dzp); 1944 if (may_delete_now) { 1945 toobig = 1946 zp->z_size > zp->z_blksz * DMU_MAX_DELETEBLKCNT; 1947 /* if the file is too big, only hold_free a token amount */ 1948 dmu_tx_hold_free(tx, zp->z_id, 0, 1949 (toobig ? DMU_MAX_ACCESS : DMU_OBJECT_END)); 1950 } 1951 1952 /* are there any extended attributes? */ 1953 error = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs), 1954 &xattr_obj, sizeof (xattr_obj)); 1955 if (error == 0 && xattr_obj) { 1956 error = zfs_zget(zfsvfs, xattr_obj, &xzp); 1957 ASSERT0(error); 1958 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); 1959 dmu_tx_hold_sa(tx, xzp->z_sa_hdl, B_FALSE); 1960 } 1961 1962 mutex_enter(&zp->z_lock); 1963 if ((acl_obj = zfs_external_acl(zp)) != 0 && may_delete_now) 1964 dmu_tx_hold_free(tx, acl_obj, 0, DMU_OBJECT_END); 1965 mutex_exit(&zp->z_lock); 1966 1967 /* charge as an update -- would be nice not to charge at all */ 1968 dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 1969 1970 error = dmu_tx_assign(tx, waited ? TXG_WAITED : TXG_NOWAIT); 1971 if (error) { 1972 zfs_dirent_unlock(dl); 1973 VN_RELE(vp); 1974 if (xzp) 1975 VN_RELE(ZTOV(xzp)); 1976 if (error == ERESTART) { 1977 waited = B_TRUE; 1978 dmu_tx_wait(tx); 1979 dmu_tx_abort(tx); 1980 goto top; 1981 } 1982 if (realnmp) 1983 pn_free(realnmp); 1984 dmu_tx_abort(tx); 1985 ZFS_EXIT(zfsvfs); 1986 return (error); 1987 } 1988 1989 /* 1990 * Remove the directory entry. 1991 */ 1992 error = zfs_link_destroy(dl, zp, tx, zflg, &unlinked); 1993 1994 if (error) { 1995 dmu_tx_commit(tx); 1996 goto out; 1997 } 1998 1999 if (unlinked) { 2000 2001 /* 2002 * Hold z_lock so that we can make sure that the ACL obj 2003 * hasn't changed. Could have been deleted due to 2004 * zfs_sa_upgrade(). 2005 */ 2006 mutex_enter(&zp->z_lock); 2007 VI_LOCK(vp); 2008 (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs), 2009 &xattr_obj_unlinked, sizeof (xattr_obj_unlinked)); 2010 delete_now = may_delete_now && !toobig && 2011 vp->v_count == 1 && !vn_has_cached_data(vp) && 2012 xattr_obj == xattr_obj_unlinked && zfs_external_acl(zp) == 2013 acl_obj; 2014 VI_UNLOCK(vp); 2015 } 2016 2017 if (delete_now) { 2018#ifdef __FreeBSD__ 2019 panic("zfs_remove: delete_now branch taken"); 2020#endif 2021 if (xattr_obj_unlinked) { 2022 ASSERT3U(xzp->z_links, ==, 2); 2023 mutex_enter(&xzp->z_lock); 2024 xzp->z_unlinked = 1; 2025 xzp->z_links = 0; 2026 error = sa_update(xzp->z_sa_hdl, SA_ZPL_LINKS(zfsvfs), 2027 &xzp->z_links, sizeof (xzp->z_links), tx); 2028 ASSERT3U(error, ==, 0); 2029 mutex_exit(&xzp->z_lock); 2030 zfs_unlinked_add(xzp, tx); 2031 2032 if (zp->z_is_sa) 2033 error = sa_remove(zp->z_sa_hdl, 2034 SA_ZPL_XATTR(zfsvfs), tx); 2035 else 2036 error = sa_update(zp->z_sa_hdl, 2037 SA_ZPL_XATTR(zfsvfs), &null_xattr, 2038 sizeof (uint64_t), tx); 2039 ASSERT0(error); 2040 } 2041 VI_LOCK(vp); 2042 vp->v_count--; 2043 ASSERT0(vp->v_count); 2044 VI_UNLOCK(vp); 2045 mutex_exit(&zp->z_lock); 2046 zfs_znode_delete(zp, tx); 2047 } else if (unlinked) { 2048 mutex_exit(&zp->z_lock); 2049 zfs_unlinked_add(zp, tx); 2050#ifdef __FreeBSD__ 2051 vp->v_vflag |= VV_NOSYNC; 2052#endif 2053 } 2054 2055 txtype = TX_REMOVE; 2056 if (flags & FIGNORECASE) 2057 txtype |= TX_CI; 2058 zfs_log_remove(zilog, tx, txtype, dzp, name, obj); 2059 2060 dmu_tx_commit(tx); 2061out: 2062 if (realnmp) 2063 pn_free(realnmp); 2064 2065 zfs_dirent_unlock(dl); 2066 2067 if (!delete_now) 2068 VN_RELE(vp); 2069 if (xzp) 2070 VN_RELE(ZTOV(xzp)); 2071 2072 if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 2073 zil_commit(zilog, 0); 2074 2075 ZFS_EXIT(zfsvfs); 2076 return (error); 2077} 2078 2079/* 2080 * Create a new directory and insert it into dvp using the name 2081 * provided. Return a pointer to the inserted directory. 2082 * 2083 * IN: dvp - vnode of directory to add subdir to. 2084 * dirname - name of new directory. 2085 * vap - attributes of new directory. 2086 * cr - credentials of caller. 2087 * ct - caller context 2088 * flags - case flags 2089 * vsecp - ACL to be set 2090 * 2091 * OUT: vpp - vnode of created directory. 2092 * 2093 * RETURN: 0 on success, error code on failure. 2094 * 2095 * Timestamps: 2096 * dvp - ctime|mtime updated 2097 * vp - ctime|mtime|atime updated 2098 */ 2099/*ARGSUSED*/ 2100static int 2101zfs_mkdir(vnode_t *dvp, char *dirname, vattr_t *vap, vnode_t **vpp, cred_t *cr, 2102 caller_context_t *ct, int flags, vsecattr_t *vsecp) 2103{ 2104 znode_t *zp, *dzp = VTOZ(dvp); 2105 zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 2106 zilog_t *zilog; 2107 zfs_dirlock_t *dl; 2108 uint64_t txtype; 2109 dmu_tx_t *tx; 2110 int error; 2111 int zf = ZNEW; 2112 ksid_t *ksid; 2113 uid_t uid; 2114 gid_t gid = crgetgid(cr); 2115 zfs_acl_ids_t acl_ids; 2116 boolean_t fuid_dirtied; 2117 boolean_t waited = B_FALSE; 2118 2119 ASSERT(vap->va_type == VDIR); 2120 2121 /* 2122 * If we have an ephemeral id, ACL, or XVATTR then 2123 * make sure file system is at proper version 2124 */ 2125 2126 ksid = crgetsid(cr, KSID_OWNER); 2127 if (ksid) 2128 uid = ksid_getid(ksid); 2129 else 2130 uid = crgetuid(cr); 2131 if (zfsvfs->z_use_fuids == B_FALSE && 2132 (vsecp || (vap->va_mask & AT_XVATTR) || 2133 IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid))) 2134 return (SET_ERROR(EINVAL)); 2135 2136 ZFS_ENTER(zfsvfs); 2137 ZFS_VERIFY_ZP(dzp); 2138 zilog = zfsvfs->z_log; 2139 2140 if (dzp->z_pflags & ZFS_XATTR) { 2141 ZFS_EXIT(zfsvfs); 2142 return (SET_ERROR(EINVAL)); 2143 } 2144 2145 if (zfsvfs->z_utf8 && u8_validate(dirname, 2146 strlen(dirname), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 2147 ZFS_EXIT(zfsvfs); 2148 return (SET_ERROR(EILSEQ)); 2149 } 2150 if (flags & FIGNORECASE) 2151 zf |= ZCILOOK; 2152 2153 if (vap->va_mask & AT_XVATTR) { 2154 if ((error = secpolicy_xvattr(dvp, (xvattr_t *)vap, 2155 crgetuid(cr), cr, vap->va_type)) != 0) { 2156 ZFS_EXIT(zfsvfs); 2157 return (error); 2158 } 2159 } 2160 2161 if ((error = zfs_acl_ids_create(dzp, 0, vap, cr, 2162 vsecp, &acl_ids)) != 0) { 2163 ZFS_EXIT(zfsvfs); 2164 return (error); 2165 } 2166 /* 2167 * First make sure the new directory doesn't exist. 2168 * 2169 * Existence is checked first to make sure we don't return 2170 * EACCES instead of EEXIST which can cause some applications 2171 * to fail. 2172 */ 2173top: 2174 *vpp = NULL; 2175 2176 if (error = zfs_dirent_lock(&dl, dzp, dirname, &zp, zf, 2177 NULL, NULL)) { 2178 zfs_acl_ids_free(&acl_ids); 2179 ZFS_EXIT(zfsvfs); 2180 return (error); 2181 } 2182 2183 if (error = zfs_zaccess(dzp, ACE_ADD_SUBDIRECTORY, 0, B_FALSE, cr)) { 2184 zfs_acl_ids_free(&acl_ids); 2185 zfs_dirent_unlock(dl); 2186 ZFS_EXIT(zfsvfs); 2187 return (error); 2188 } 2189 2190 if (zfs_acl_ids_overquota(zfsvfs, &acl_ids)) { 2191 zfs_acl_ids_free(&acl_ids); 2192 zfs_dirent_unlock(dl); 2193 ZFS_EXIT(zfsvfs); 2194 return (SET_ERROR(EDQUOT)); 2195 } 2196 2197 /* 2198 * Add a new entry to the directory. 2199 */ 2200 tx = dmu_tx_create(zfsvfs->z_os); 2201 dmu_tx_hold_zap(tx, dzp->z_id, TRUE, dirname); 2202 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 2203 fuid_dirtied = zfsvfs->z_fuid_dirty; 2204 if (fuid_dirtied) 2205 zfs_fuid_txhold(zfsvfs, tx); 2206 if (!zfsvfs->z_use_sa && acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) { 2207 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 2208 acl_ids.z_aclp->z_acl_bytes); 2209 } 2210 2211 dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes + 2212 ZFS_SA_BASE_ATTR_SIZE); 2213 2214 error = dmu_tx_assign(tx, waited ? TXG_WAITED : TXG_NOWAIT); 2215 if (error) { 2216 zfs_dirent_unlock(dl); 2217 if (error == ERESTART) { 2218 waited = B_TRUE; 2219 dmu_tx_wait(tx); 2220 dmu_tx_abort(tx); 2221 goto top; 2222 } 2223 zfs_acl_ids_free(&acl_ids); 2224 dmu_tx_abort(tx); 2225 ZFS_EXIT(zfsvfs); 2226 return (error); 2227 } 2228 2229 /* 2230 * Create new node. 2231 */ 2232 zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids); 2233 2234 if (fuid_dirtied) 2235 zfs_fuid_sync(zfsvfs, tx); 2236 2237 /* 2238 * Now put new name in parent dir. 2239 */ 2240 (void) zfs_link_create(dl, zp, tx, ZNEW); 2241 2242 *vpp = ZTOV(zp); 2243 2244 txtype = zfs_log_create_txtype(Z_DIR, vsecp, vap); 2245 if (flags & FIGNORECASE) 2246 txtype |= TX_CI; 2247 zfs_log_create(zilog, tx, txtype, dzp, zp, dirname, vsecp, 2248 acl_ids.z_fuidp, vap); 2249 2250 zfs_acl_ids_free(&acl_ids); 2251 2252 dmu_tx_commit(tx); 2253 2254 zfs_dirent_unlock(dl); 2255 2256 if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 2257 zil_commit(zilog, 0); 2258 2259 ZFS_EXIT(zfsvfs); 2260 return (0); 2261} 2262 2263/* 2264 * Remove a directory subdir entry. If the current working 2265 * directory is the same as the subdir to be removed, the 2266 * remove will fail. 2267 * 2268 * IN: dvp - vnode of directory to remove from. 2269 * name - name of directory to be removed. 2270 * cwd - vnode of current working directory. 2271 * cr - credentials of caller. 2272 * ct - caller context 2273 * flags - case flags 2274 * 2275 * RETURN: 0 on success, error code on failure. 2276 * 2277 * Timestamps: 2278 * dvp - ctime|mtime updated 2279 */ 2280/*ARGSUSED*/ 2281static int 2282zfs_rmdir(vnode_t *dvp, char *name, vnode_t *cwd, cred_t *cr, 2283 caller_context_t *ct, int flags) 2284{ 2285 znode_t *dzp = VTOZ(dvp); 2286 znode_t *zp; 2287 vnode_t *vp; 2288 zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 2289 zilog_t *zilog; 2290 zfs_dirlock_t *dl; 2291 dmu_tx_t *tx; 2292 int error; 2293 int zflg = ZEXISTS; 2294 boolean_t waited = B_FALSE; 2295 2296 ZFS_ENTER(zfsvfs); 2297 ZFS_VERIFY_ZP(dzp); 2298 zilog = zfsvfs->z_log; 2299 2300 if (flags & FIGNORECASE) 2301 zflg |= ZCILOOK; 2302top: 2303 zp = NULL; 2304 2305 /* 2306 * Attempt to lock directory; fail if entry doesn't exist. 2307 */ 2308 if (error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 2309 NULL, NULL)) { 2310 ZFS_EXIT(zfsvfs); 2311 return (error); 2312 } 2313 2314 vp = ZTOV(zp); 2315 2316 if (error = zfs_zaccess_delete(dzp, zp, cr)) { 2317 goto out; 2318 } 2319 2320 if (vp->v_type != VDIR) { 2321 error = SET_ERROR(ENOTDIR); 2322 goto out; 2323 } 2324 2325 if (vp == cwd) { 2326 error = SET_ERROR(EINVAL); 2327 goto out; 2328 } 2329 2330 vnevent_rmdir(vp, dvp, name, ct); 2331 2332 /* 2333 * Grab a lock on the directory to make sure that noone is 2334 * trying to add (or lookup) entries while we are removing it. 2335 */ 2336 rw_enter(&zp->z_name_lock, RW_WRITER); 2337 2338 /* 2339 * Grab a lock on the parent pointer to make sure we play well 2340 * with the treewalk and directory rename code. 2341 */ 2342 rw_enter(&zp->z_parent_lock, RW_WRITER); 2343 2344 tx = dmu_tx_create(zfsvfs->z_os); 2345 dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); 2346 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); 2347 dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 2348 zfs_sa_upgrade_txholds(tx, zp); 2349 zfs_sa_upgrade_txholds(tx, dzp); 2350 error = dmu_tx_assign(tx, waited ? TXG_WAITED : TXG_NOWAIT); 2351 if (error) { 2352 rw_exit(&zp->z_parent_lock); 2353 rw_exit(&zp->z_name_lock); 2354 zfs_dirent_unlock(dl); 2355 VN_RELE(vp); 2356 if (error == ERESTART) { 2357 waited = B_TRUE; 2358 dmu_tx_wait(tx); 2359 dmu_tx_abort(tx); 2360 goto top; 2361 } 2362 dmu_tx_abort(tx); 2363 ZFS_EXIT(zfsvfs); 2364 return (error); 2365 } 2366 2367#ifdef FREEBSD_NAMECACHE 2368 cache_purge(dvp); 2369#endif 2370 2371 error = zfs_link_destroy(dl, zp, tx, zflg, NULL); 2372 2373 if (error == 0) { 2374 uint64_t txtype = TX_RMDIR; 2375 if (flags & FIGNORECASE) 2376 txtype |= TX_CI; 2377 zfs_log_remove(zilog, tx, txtype, dzp, name, ZFS_NO_OBJECT); 2378 } 2379 2380 dmu_tx_commit(tx); 2381 2382 rw_exit(&zp->z_parent_lock); 2383 rw_exit(&zp->z_name_lock); 2384#ifdef FREEBSD_NAMECACHE 2385 cache_purge(vp); 2386#endif 2387out: 2388 zfs_dirent_unlock(dl); 2389 2390 VN_RELE(vp); 2391 2392 if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 2393 zil_commit(zilog, 0); 2394 2395 ZFS_EXIT(zfsvfs); 2396 return (error); 2397} 2398 2399/* 2400 * Read as many directory entries as will fit into the provided 2401 * buffer from the given directory cursor position (specified in 2402 * the uio structure). 2403 * 2404 * IN: vp - vnode of directory to read. 2405 * uio - structure supplying read location, range info, 2406 * and return buffer. 2407 * cr - credentials of caller. 2408 * ct - caller context 2409 * flags - case flags 2410 * 2411 * OUT: uio - updated offset and range, buffer filled. 2412 * eofp - set to true if end-of-file detected. 2413 * 2414 * RETURN: 0 on success, error code on failure. 2415 * 2416 * Timestamps: 2417 * vp - atime updated 2418 * 2419 * Note that the low 4 bits of the cookie returned by zap is always zero. 2420 * This allows us to use the low range for "special" directory entries: 2421 * We use 0 for '.', and 1 for '..'. If this is the root of the filesystem, 2422 * we use the offset 2 for the '.zfs' directory. 2423 */ 2424/* ARGSUSED */ 2425static int 2426zfs_readdir(vnode_t *vp, uio_t *uio, cred_t *cr, int *eofp, int *ncookies, u_long **cookies) 2427{ 2428 znode_t *zp = VTOZ(vp); 2429 iovec_t *iovp; 2430 edirent_t *eodp; 2431 dirent64_t *odp; 2432 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2433 objset_t *os; 2434 caddr_t outbuf; 2435 size_t bufsize; 2436 zap_cursor_t zc; 2437 zap_attribute_t zap; 2438 uint_t bytes_wanted; 2439 uint64_t offset; /* must be unsigned; checks for < 1 */ 2440 uint64_t parent; 2441 int local_eof; 2442 int outcount; 2443 int error; 2444 uint8_t prefetch; 2445 boolean_t check_sysattrs; 2446 uint8_t type; 2447 int ncooks; 2448 u_long *cooks = NULL; 2449 int flags = 0; 2450 2451 ZFS_ENTER(zfsvfs); 2452 ZFS_VERIFY_ZP(zp); 2453 2454 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs), 2455 &parent, sizeof (parent))) != 0) { 2456 ZFS_EXIT(zfsvfs); 2457 return (error); 2458 } 2459 2460 /* 2461 * If we are not given an eof variable, 2462 * use a local one. 2463 */ 2464 if (eofp == NULL) 2465 eofp = &local_eof; 2466 2467 /* 2468 * Check for valid iov_len. 2469 */ 2470 if (uio->uio_iov->iov_len <= 0) { 2471 ZFS_EXIT(zfsvfs); 2472 return (SET_ERROR(EINVAL)); 2473 } 2474 2475 /* 2476 * Quit if directory has been removed (posix) 2477 */ 2478 if ((*eofp = zp->z_unlinked) != 0) { 2479 ZFS_EXIT(zfsvfs); 2480 return (0); 2481 } 2482 2483 error = 0; 2484 os = zfsvfs->z_os; 2485 offset = uio->uio_loffset; 2486 prefetch = zp->z_zn_prefetch; 2487 2488 /* 2489 * Initialize the iterator cursor. 2490 */ 2491 if (offset <= 3) { 2492 /* 2493 * Start iteration from the beginning of the directory. 2494 */ 2495 zap_cursor_init(&zc, os, zp->z_id); 2496 } else { 2497 /* 2498 * The offset is a serialized cursor. 2499 */ 2500 zap_cursor_init_serialized(&zc, os, zp->z_id, offset); 2501 } 2502 2503 /* 2504 * Get space to change directory entries into fs independent format. 2505 */ 2506 iovp = uio->uio_iov; 2507 bytes_wanted = iovp->iov_len; 2508 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) { 2509 bufsize = bytes_wanted; 2510 outbuf = kmem_alloc(bufsize, KM_SLEEP); 2511 odp = (struct dirent64 *)outbuf; 2512 } else { 2513 bufsize = bytes_wanted; 2514 outbuf = NULL; 2515 odp = (struct dirent64 *)iovp->iov_base; 2516 } 2517 eodp = (struct edirent *)odp; 2518 2519 if (ncookies != NULL) { 2520 /* 2521 * Minimum entry size is dirent size and 1 byte for a file name. 2522 */ 2523 ncooks = uio->uio_resid / (sizeof(struct dirent) - sizeof(((struct dirent *)NULL)->d_name) + 1); 2524 cooks = malloc(ncooks * sizeof(u_long), M_TEMP, M_WAITOK); 2525 *cookies = cooks; 2526 *ncookies = ncooks; 2527 } 2528 /* 2529 * If this VFS supports the system attribute view interface; and 2530 * we're looking at an extended attribute directory; and we care 2531 * about normalization conflicts on this vfs; then we must check 2532 * for normalization conflicts with the sysattr name space. 2533 */ 2534#ifdef TODO 2535 check_sysattrs = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) && 2536 (vp->v_flag & V_XATTRDIR) && zfsvfs->z_norm && 2537 (flags & V_RDDIR_ENTFLAGS); 2538#else 2539 check_sysattrs = 0; 2540#endif 2541 2542 /* 2543 * Transform to file-system independent format 2544 */ 2545 outcount = 0; 2546 while (outcount < bytes_wanted) { 2547 ino64_t objnum; 2548 ushort_t reclen; 2549 off64_t *next = NULL; 2550 2551 /* 2552 * Special case `.', `..', and `.zfs'. 2553 */ 2554 if (offset == 0) { 2555 (void) strcpy(zap.za_name, "."); 2556 zap.za_normalization_conflict = 0; 2557 objnum = zp->z_id; 2558 type = DT_DIR; 2559 } else if (offset == 1) { 2560 (void) strcpy(zap.za_name, ".."); 2561 zap.za_normalization_conflict = 0; 2562 objnum = parent; 2563 type = DT_DIR; 2564 } else if (offset == 2 && zfs_show_ctldir(zp)) { 2565 (void) strcpy(zap.za_name, ZFS_CTLDIR_NAME); 2566 zap.za_normalization_conflict = 0; 2567 objnum = ZFSCTL_INO_ROOT; 2568 type = DT_DIR; 2569 } else { 2570 /* 2571 * Grab next entry. 2572 */ 2573 if (error = zap_cursor_retrieve(&zc, &zap)) { 2574 if ((*eofp = (error == ENOENT)) != 0) 2575 break; 2576 else 2577 goto update; 2578 } 2579 2580 if (zap.za_integer_length != 8 || 2581 zap.za_num_integers != 1) { 2582 cmn_err(CE_WARN, "zap_readdir: bad directory " 2583 "entry, obj = %lld, offset = %lld\n", 2584 (u_longlong_t)zp->z_id, 2585 (u_longlong_t)offset); 2586 error = SET_ERROR(ENXIO); 2587 goto update; 2588 } 2589 2590 objnum = ZFS_DIRENT_OBJ(zap.za_first_integer); 2591 /* 2592 * MacOS X can extract the object type here such as: 2593 * uint8_t type = ZFS_DIRENT_TYPE(zap.za_first_integer); 2594 */ 2595 type = ZFS_DIRENT_TYPE(zap.za_first_integer); 2596 2597 if (check_sysattrs && !zap.za_normalization_conflict) { 2598#ifdef TODO 2599 zap.za_normalization_conflict = 2600 xattr_sysattr_casechk(zap.za_name); 2601#else 2602 panic("%s:%u: TODO", __func__, __LINE__); 2603#endif 2604 } 2605 } 2606 2607 if (flags & V_RDDIR_ACCFILTER) { 2608 /* 2609 * If we have no access at all, don't include 2610 * this entry in the returned information 2611 */ 2612 znode_t *ezp; 2613 if (zfs_zget(zp->z_zfsvfs, objnum, &ezp) != 0) 2614 goto skip_entry; 2615 if (!zfs_has_access(ezp, cr)) { 2616 VN_RELE(ZTOV(ezp)); 2617 goto skip_entry; 2618 } 2619 VN_RELE(ZTOV(ezp)); 2620 } 2621 2622 if (flags & V_RDDIR_ENTFLAGS) 2623 reclen = EDIRENT_RECLEN(strlen(zap.za_name)); 2624 else 2625 reclen = DIRENT64_RECLEN(strlen(zap.za_name)); 2626 2627 /* 2628 * Will this entry fit in the buffer? 2629 */ 2630 if (outcount + reclen > bufsize) { 2631 /* 2632 * Did we manage to fit anything in the buffer? 2633 */ 2634 if (!outcount) { 2635 error = SET_ERROR(EINVAL); 2636 goto update; 2637 } 2638 break; 2639 } 2640 if (flags & V_RDDIR_ENTFLAGS) { 2641 /* 2642 * Add extended flag entry: 2643 */ 2644 eodp->ed_ino = objnum; 2645 eodp->ed_reclen = reclen; 2646 /* NOTE: ed_off is the offset for the *next* entry */ 2647 next = &(eodp->ed_off); 2648 eodp->ed_eflags = zap.za_normalization_conflict ? 2649 ED_CASE_CONFLICT : 0; 2650 (void) strncpy(eodp->ed_name, zap.za_name, 2651 EDIRENT_NAMELEN(reclen)); 2652 eodp = (edirent_t *)((intptr_t)eodp + reclen); 2653 } else { 2654 /* 2655 * Add normal entry: 2656 */ 2657 odp->d_ino = objnum; 2658 odp->d_reclen = reclen; 2659 odp->d_namlen = strlen(zap.za_name); 2660 (void) strlcpy(odp->d_name, zap.za_name, odp->d_namlen + 1); 2661 odp->d_type = type; 2662 odp = (dirent64_t *)((intptr_t)odp + reclen); 2663 } 2664 outcount += reclen; 2665 2666 ASSERT(outcount <= bufsize); 2667 2668 /* Prefetch znode */ 2669 if (prefetch) 2670 dmu_prefetch(os, objnum, 0, 0); 2671 2672 skip_entry: 2673 /* 2674 * Move to the next entry, fill in the previous offset. 2675 */ 2676 if (offset > 2 || (offset == 2 && !zfs_show_ctldir(zp))) { 2677 zap_cursor_advance(&zc); 2678 offset = zap_cursor_serialize(&zc); 2679 } else { 2680 offset += 1; 2681 } 2682 2683 if (cooks != NULL) { 2684 *cooks++ = offset; 2685 ncooks--; 2686 KASSERT(ncooks >= 0, ("ncookies=%d", ncooks)); 2687 } 2688 } 2689 zp->z_zn_prefetch = B_FALSE; /* a lookup will re-enable pre-fetching */ 2690 2691 /* Subtract unused cookies */ 2692 if (ncookies != NULL) 2693 *ncookies -= ncooks; 2694 2695 if (uio->uio_segflg == UIO_SYSSPACE && uio->uio_iovcnt == 1) { 2696 iovp->iov_base += outcount; 2697 iovp->iov_len -= outcount; 2698 uio->uio_resid -= outcount; 2699 } else if (error = uiomove(outbuf, (long)outcount, UIO_READ, uio)) { 2700 /* 2701 * Reset the pointer. 2702 */ 2703 offset = uio->uio_loffset; 2704 } 2705 2706update: 2707 zap_cursor_fini(&zc); 2708 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2709 kmem_free(outbuf, bufsize); 2710 2711 if (error == ENOENT) 2712 error = 0; 2713 2714 ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 2715 2716 uio->uio_loffset = offset; 2717 ZFS_EXIT(zfsvfs); 2718 if (error != 0 && cookies != NULL) { 2719 free(*cookies, M_TEMP); 2720 *cookies = NULL; 2721 *ncookies = 0; 2722 } 2723 return (error); 2724} 2725 2726ulong_t zfs_fsync_sync_cnt = 4; 2727 2728static int 2729zfs_fsync(vnode_t *vp, int syncflag, cred_t *cr, caller_context_t *ct) 2730{ 2731 znode_t *zp = VTOZ(vp); 2732 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2733 2734 (void) tsd_set(zfs_fsyncer_key, (void *)zfs_fsync_sync_cnt); 2735 2736 if (zfsvfs->z_os->os_sync != ZFS_SYNC_DISABLED) { 2737 ZFS_ENTER(zfsvfs); 2738 ZFS_VERIFY_ZP(zp); 2739 zil_commit(zfsvfs->z_log, zp->z_id); 2740 ZFS_EXIT(zfsvfs); 2741 } 2742 return (0); 2743} 2744 2745 2746/* 2747 * Get the requested file attributes and place them in the provided 2748 * vattr structure. 2749 * 2750 * IN: vp - vnode of file. 2751 * vap - va_mask identifies requested attributes. 2752 * If AT_XVATTR set, then optional attrs are requested 2753 * flags - ATTR_NOACLCHECK (CIFS server context) 2754 * cr - credentials of caller. 2755 * ct - caller context 2756 * 2757 * OUT: vap - attribute values. 2758 * 2759 * RETURN: 0 (always succeeds). 2760 */ 2761/* ARGSUSED */ 2762static int 2763zfs_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 2764 caller_context_t *ct) 2765{ 2766 znode_t *zp = VTOZ(vp); 2767 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2768 int error = 0; 2769 uint32_t blksize; 2770 u_longlong_t nblocks; 2771 uint64_t links; 2772 uint64_t mtime[2], ctime[2], crtime[2], rdev; 2773 xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */ 2774 xoptattr_t *xoap = NULL; 2775 boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 2776 sa_bulk_attr_t bulk[4]; 2777 int count = 0; 2778 2779 ZFS_ENTER(zfsvfs); 2780 ZFS_VERIFY_ZP(zp); 2781 2782 zfs_fuid_map_ids(zp, cr, &vap->va_uid, &vap->va_gid); 2783 2784 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16); 2785 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16); 2786 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL, &crtime, 16); 2787 if (vp->v_type == VBLK || vp->v_type == VCHR) 2788 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zfsvfs), NULL, 2789 &rdev, 8); 2790 2791 if ((error = sa_bulk_lookup(zp->z_sa_hdl, bulk, count)) != 0) { 2792 ZFS_EXIT(zfsvfs); 2793 return (error); 2794 } 2795 2796 /* 2797 * If ACL is trivial don't bother looking for ACE_READ_ATTRIBUTES. 2798 * Also, if we are the owner don't bother, since owner should 2799 * always be allowed to read basic attributes of file. 2800 */ 2801 if (!(zp->z_pflags & ZFS_ACL_TRIVIAL) && 2802 (vap->va_uid != crgetuid(cr))) { 2803 if (error = zfs_zaccess(zp, ACE_READ_ATTRIBUTES, 0, 2804 skipaclchk, cr)) { 2805 ZFS_EXIT(zfsvfs); 2806 return (error); 2807 } 2808 } 2809 2810 /* 2811 * Return all attributes. It's cheaper to provide the answer 2812 * than to determine whether we were asked the question. 2813 */ 2814 2815 mutex_enter(&zp->z_lock); 2816 vap->va_type = IFTOVT(zp->z_mode); 2817 vap->va_mode = zp->z_mode & ~S_IFMT; 2818#ifdef sun 2819 vap->va_fsid = zp->z_zfsvfs->z_vfs->vfs_dev; 2820#else 2821 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 2822#endif 2823 vap->va_nodeid = zp->z_id; 2824 if ((vp->v_flag & VROOT) && zfs_show_ctldir(zp)) 2825 links = zp->z_links + 1; 2826 else 2827 links = zp->z_links; 2828 vap->va_nlink = MIN(links, LINK_MAX); /* nlink_t limit! */ 2829 vap->va_size = zp->z_size; 2830#ifdef sun 2831 vap->va_rdev = vp->v_rdev; 2832#else 2833 if (vp->v_type == VBLK || vp->v_type == VCHR) 2834 vap->va_rdev = zfs_cmpldev(rdev); 2835#endif 2836 vap->va_seq = zp->z_seq; 2837 vap->va_flags = 0; /* FreeBSD: Reset chflags(2) flags. */ 2838 2839 /* 2840 * Add in any requested optional attributes and the create time. 2841 * Also set the corresponding bits in the returned attribute bitmap. 2842 */ 2843 if ((xoap = xva_getxoptattr(xvap)) != NULL && zfsvfs->z_use_fuids) { 2844 if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) { 2845 xoap->xoa_archive = 2846 ((zp->z_pflags & ZFS_ARCHIVE) != 0); 2847 XVA_SET_RTN(xvap, XAT_ARCHIVE); 2848 } 2849 2850 if (XVA_ISSET_REQ(xvap, XAT_READONLY)) { 2851 xoap->xoa_readonly = 2852 ((zp->z_pflags & ZFS_READONLY) != 0); 2853 XVA_SET_RTN(xvap, XAT_READONLY); 2854 } 2855 2856 if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) { 2857 xoap->xoa_system = 2858 ((zp->z_pflags & ZFS_SYSTEM) != 0); 2859 XVA_SET_RTN(xvap, XAT_SYSTEM); 2860 } 2861 2862 if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) { 2863 xoap->xoa_hidden = 2864 ((zp->z_pflags & ZFS_HIDDEN) != 0); 2865 XVA_SET_RTN(xvap, XAT_HIDDEN); 2866 } 2867 2868 if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { 2869 xoap->xoa_nounlink = 2870 ((zp->z_pflags & ZFS_NOUNLINK) != 0); 2871 XVA_SET_RTN(xvap, XAT_NOUNLINK); 2872 } 2873 2874 if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { 2875 xoap->xoa_immutable = 2876 ((zp->z_pflags & ZFS_IMMUTABLE) != 0); 2877 XVA_SET_RTN(xvap, XAT_IMMUTABLE); 2878 } 2879 2880 if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { 2881 xoap->xoa_appendonly = 2882 ((zp->z_pflags & ZFS_APPENDONLY) != 0); 2883 XVA_SET_RTN(xvap, XAT_APPENDONLY); 2884 } 2885 2886 if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { 2887 xoap->xoa_nodump = 2888 ((zp->z_pflags & ZFS_NODUMP) != 0); 2889 XVA_SET_RTN(xvap, XAT_NODUMP); 2890 } 2891 2892 if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) { 2893 xoap->xoa_opaque = 2894 ((zp->z_pflags & ZFS_OPAQUE) != 0); 2895 XVA_SET_RTN(xvap, XAT_OPAQUE); 2896 } 2897 2898 if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { 2899 xoap->xoa_av_quarantined = 2900 ((zp->z_pflags & ZFS_AV_QUARANTINED) != 0); 2901 XVA_SET_RTN(xvap, XAT_AV_QUARANTINED); 2902 } 2903 2904 if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { 2905 xoap->xoa_av_modified = 2906 ((zp->z_pflags & ZFS_AV_MODIFIED) != 0); 2907 XVA_SET_RTN(xvap, XAT_AV_MODIFIED); 2908 } 2909 2910 if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) && 2911 vp->v_type == VREG) { 2912 zfs_sa_get_scanstamp(zp, xvap); 2913 } 2914 2915 if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) { 2916 uint64_t times[2]; 2917 2918 (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_CRTIME(zfsvfs), 2919 times, sizeof (times)); 2920 ZFS_TIME_DECODE(&xoap->xoa_createtime, times); 2921 XVA_SET_RTN(xvap, XAT_CREATETIME); 2922 } 2923 2924 if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) { 2925 xoap->xoa_reparse = ((zp->z_pflags & ZFS_REPARSE) != 0); 2926 XVA_SET_RTN(xvap, XAT_REPARSE); 2927 } 2928 if (XVA_ISSET_REQ(xvap, XAT_GEN)) { 2929 xoap->xoa_generation = zp->z_gen; 2930 XVA_SET_RTN(xvap, XAT_GEN); 2931 } 2932 2933 if (XVA_ISSET_REQ(xvap, XAT_OFFLINE)) { 2934 xoap->xoa_offline = 2935 ((zp->z_pflags & ZFS_OFFLINE) != 0); 2936 XVA_SET_RTN(xvap, XAT_OFFLINE); 2937 } 2938 2939 if (XVA_ISSET_REQ(xvap, XAT_SPARSE)) { 2940 xoap->xoa_sparse = 2941 ((zp->z_pflags & ZFS_SPARSE) != 0); 2942 XVA_SET_RTN(xvap, XAT_SPARSE); 2943 } 2944 } 2945 2946 ZFS_TIME_DECODE(&vap->va_atime, zp->z_atime); 2947 ZFS_TIME_DECODE(&vap->va_mtime, mtime); 2948 ZFS_TIME_DECODE(&vap->va_ctime, ctime); 2949 ZFS_TIME_DECODE(&vap->va_birthtime, crtime); 2950 2951 mutex_exit(&zp->z_lock); 2952 2953 sa_object_size(zp->z_sa_hdl, &blksize, &nblocks); 2954 vap->va_blksize = blksize; 2955 vap->va_bytes = nblocks << 9; /* nblocks * 512 */ 2956 2957 if (zp->z_blksz == 0) { 2958 /* 2959 * Block size hasn't been set; suggest maximal I/O transfers. 2960 */ 2961 vap->va_blksize = zfsvfs->z_max_blksz; 2962 } 2963 2964 ZFS_EXIT(zfsvfs); 2965 return (0); 2966} 2967 2968/* 2969 * Set the file attributes to the values contained in the 2970 * vattr structure. 2971 * 2972 * IN: vp - vnode of file to be modified. 2973 * vap - new attribute values. 2974 * If AT_XVATTR set, then optional attrs are being set 2975 * flags - ATTR_UTIME set if non-default time values provided. 2976 * - ATTR_NOACLCHECK (CIFS context only). 2977 * cr - credentials of caller. 2978 * ct - caller context 2979 * 2980 * RETURN: 0 on success, error code on failure. 2981 * 2982 * Timestamps: 2983 * vp - ctime updated, mtime updated if size changed. 2984 */ 2985/* ARGSUSED */ 2986static int 2987zfs_setattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 2988 caller_context_t *ct) 2989{ 2990 znode_t *zp = VTOZ(vp); 2991 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2992 zilog_t *zilog; 2993 dmu_tx_t *tx; 2994 vattr_t oldva; 2995 xvattr_t tmpxvattr; 2996 uint_t mask = vap->va_mask; 2997 uint_t saved_mask = 0; 2998 uint64_t saved_mode; 2999 int trim_mask = 0; 3000 uint64_t new_mode; 3001 uint64_t new_uid, new_gid; 3002 uint64_t xattr_obj; 3003 uint64_t mtime[2], ctime[2]; 3004 znode_t *attrzp; 3005 int need_policy = FALSE; 3006 int err, err2; 3007 zfs_fuid_info_t *fuidp = NULL; 3008 xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */ 3009 xoptattr_t *xoap; 3010 zfs_acl_t *aclp; 3011 boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 3012 boolean_t fuid_dirtied = B_FALSE; 3013 sa_bulk_attr_t bulk[7], xattr_bulk[7]; 3014 int count = 0, xattr_count = 0; 3015 3016 if (mask == 0) 3017 return (0); 3018 3019 if (mask & AT_NOSET) 3020 return (SET_ERROR(EINVAL)); 3021 3022 ZFS_ENTER(zfsvfs); 3023 ZFS_VERIFY_ZP(zp); 3024 3025 zilog = zfsvfs->z_log; 3026 3027 /* 3028 * Make sure that if we have ephemeral uid/gid or xvattr specified 3029 * that file system is at proper version level 3030 */ 3031 3032 if (zfsvfs->z_use_fuids == B_FALSE && 3033 (((mask & AT_UID) && IS_EPHEMERAL(vap->va_uid)) || 3034 ((mask & AT_GID) && IS_EPHEMERAL(vap->va_gid)) || 3035 (mask & AT_XVATTR))) { 3036 ZFS_EXIT(zfsvfs); 3037 return (SET_ERROR(EINVAL)); 3038 } 3039 3040 if (mask & AT_SIZE && vp->v_type == VDIR) { 3041 ZFS_EXIT(zfsvfs); 3042 return (SET_ERROR(EISDIR)); 3043 } 3044 3045 if (mask & AT_SIZE && vp->v_type != VREG && vp->v_type != VFIFO) { 3046 ZFS_EXIT(zfsvfs); 3047 return (SET_ERROR(EINVAL)); 3048 } 3049 3050 /* 3051 * If this is an xvattr_t, then get a pointer to the structure of 3052 * optional attributes. If this is NULL, then we have a vattr_t. 3053 */ 3054 xoap = xva_getxoptattr(xvap); 3055 3056 xva_init(&tmpxvattr); 3057 3058 /* 3059 * Immutable files can only alter immutable bit and atime 3060 */ 3061 if ((zp->z_pflags & ZFS_IMMUTABLE) && 3062 ((mask & (AT_SIZE|AT_UID|AT_GID|AT_MTIME|AT_MODE)) || 3063 ((mask & AT_XVATTR) && XVA_ISSET_REQ(xvap, XAT_CREATETIME)))) { 3064 ZFS_EXIT(zfsvfs); 3065 return (SET_ERROR(EPERM)); 3066 } 3067 3068 if ((mask & AT_SIZE) && (zp->z_pflags & ZFS_READONLY)) { 3069 ZFS_EXIT(zfsvfs); 3070 return (SET_ERROR(EPERM)); 3071 } 3072 3073 /* 3074 * Verify timestamps doesn't overflow 32 bits. 3075 * ZFS can handle large timestamps, but 32bit syscalls can't 3076 * handle times greater than 2039. This check should be removed 3077 * once large timestamps are fully supported. 3078 */ 3079 if (mask & (AT_ATIME | AT_MTIME)) { 3080 if (((mask & AT_ATIME) && TIMESPEC_OVERFLOW(&vap->va_atime)) || 3081 ((mask & AT_MTIME) && TIMESPEC_OVERFLOW(&vap->va_mtime))) { 3082 ZFS_EXIT(zfsvfs); 3083 return (SET_ERROR(EOVERFLOW)); 3084 } 3085 } 3086 3087top: 3088 attrzp = NULL; 3089 aclp = NULL; 3090 3091 /* Can this be moved to before the top label? */ 3092 if (zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) { 3093 ZFS_EXIT(zfsvfs); 3094 return (SET_ERROR(EROFS)); 3095 } 3096 3097 /* 3098 * First validate permissions 3099 */ 3100 3101 if (mask & AT_SIZE) { 3102 /* 3103 * XXX - Note, we are not providing any open 3104 * mode flags here (like FNDELAY), so we may 3105 * block if there are locks present... this 3106 * should be addressed in openat(). 3107 */ 3108 /* XXX - would it be OK to generate a log record here? */ 3109 err = zfs_freesp(zp, vap->va_size, 0, 0, FALSE); 3110 if (err) { 3111 ZFS_EXIT(zfsvfs); 3112 return (err); 3113 } 3114 } 3115 3116 if (mask & (AT_ATIME|AT_MTIME) || 3117 ((mask & AT_XVATTR) && (XVA_ISSET_REQ(xvap, XAT_HIDDEN) || 3118 XVA_ISSET_REQ(xvap, XAT_READONLY) || 3119 XVA_ISSET_REQ(xvap, XAT_ARCHIVE) || 3120 XVA_ISSET_REQ(xvap, XAT_OFFLINE) || 3121 XVA_ISSET_REQ(xvap, XAT_SPARSE) || 3122 XVA_ISSET_REQ(xvap, XAT_CREATETIME) || 3123 XVA_ISSET_REQ(xvap, XAT_SYSTEM)))) { 3124 need_policy = zfs_zaccess(zp, ACE_WRITE_ATTRIBUTES, 0, 3125 skipaclchk, cr); 3126 } 3127 3128 if (mask & (AT_UID|AT_GID)) { 3129 int idmask = (mask & (AT_UID|AT_GID)); 3130 int take_owner; 3131 int take_group; 3132 3133 /* 3134 * NOTE: even if a new mode is being set, 3135 * we may clear S_ISUID/S_ISGID bits. 3136 */ 3137 3138 if (!(mask & AT_MODE)) 3139 vap->va_mode = zp->z_mode; 3140 3141 /* 3142 * Take ownership or chgrp to group we are a member of 3143 */ 3144 3145 take_owner = (mask & AT_UID) && (vap->va_uid == crgetuid(cr)); 3146 take_group = (mask & AT_GID) && 3147 zfs_groupmember(zfsvfs, vap->va_gid, cr); 3148 3149 /* 3150 * If both AT_UID and AT_GID are set then take_owner and 3151 * take_group must both be set in order to allow taking 3152 * ownership. 3153 * 3154 * Otherwise, send the check through secpolicy_vnode_setattr() 3155 * 3156 */ 3157 3158 if (((idmask == (AT_UID|AT_GID)) && take_owner && take_group) || 3159 ((idmask == AT_UID) && take_owner) || 3160 ((idmask == AT_GID) && take_group)) { 3161 if (zfs_zaccess(zp, ACE_WRITE_OWNER, 0, 3162 skipaclchk, cr) == 0) { 3163 /* 3164 * Remove setuid/setgid for non-privileged users 3165 */ 3166 secpolicy_setid_clear(vap, vp, cr); 3167 trim_mask = (mask & (AT_UID|AT_GID)); 3168 } else { 3169 need_policy = TRUE; 3170 } 3171 } else { 3172 need_policy = TRUE; 3173 } 3174 } 3175 3176 mutex_enter(&zp->z_lock); 3177 oldva.va_mode = zp->z_mode; 3178 zfs_fuid_map_ids(zp, cr, &oldva.va_uid, &oldva.va_gid); 3179 if (mask & AT_XVATTR) { 3180 /* 3181 * Update xvattr mask to include only those attributes 3182 * that are actually changing. 3183 * 3184 * the bits will be restored prior to actually setting 3185 * the attributes so the caller thinks they were set. 3186 */ 3187 if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { 3188 if (xoap->xoa_appendonly != 3189 ((zp->z_pflags & ZFS_APPENDONLY) != 0)) { 3190 need_policy = TRUE; 3191 } else { 3192 XVA_CLR_REQ(xvap, XAT_APPENDONLY); 3193 XVA_SET_REQ(&tmpxvattr, XAT_APPENDONLY); 3194 } 3195 } 3196 3197 if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { 3198 if (xoap->xoa_nounlink != 3199 ((zp->z_pflags & ZFS_NOUNLINK) != 0)) { 3200 need_policy = TRUE; 3201 } else { 3202 XVA_CLR_REQ(xvap, XAT_NOUNLINK); 3203 XVA_SET_REQ(&tmpxvattr, XAT_NOUNLINK); 3204 } 3205 } 3206 3207 if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { 3208 if (xoap->xoa_immutable != 3209 ((zp->z_pflags & ZFS_IMMUTABLE) != 0)) { 3210 need_policy = TRUE; 3211 } else { 3212 XVA_CLR_REQ(xvap, XAT_IMMUTABLE); 3213 XVA_SET_REQ(&tmpxvattr, XAT_IMMUTABLE); 3214 } 3215 } 3216 3217 if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { 3218 if (xoap->xoa_nodump != 3219 ((zp->z_pflags & ZFS_NODUMP) != 0)) { 3220 need_policy = TRUE; 3221 } else { 3222 XVA_CLR_REQ(xvap, XAT_NODUMP); 3223 XVA_SET_REQ(&tmpxvattr, XAT_NODUMP); 3224 } 3225 } 3226 3227 if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { 3228 if (xoap->xoa_av_modified != 3229 ((zp->z_pflags & ZFS_AV_MODIFIED) != 0)) { 3230 need_policy = TRUE; 3231 } else { 3232 XVA_CLR_REQ(xvap, XAT_AV_MODIFIED); 3233 XVA_SET_REQ(&tmpxvattr, XAT_AV_MODIFIED); 3234 } 3235 } 3236 3237 if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { 3238 if ((vp->v_type != VREG && 3239 xoap->xoa_av_quarantined) || 3240 xoap->xoa_av_quarantined != 3241 ((zp->z_pflags & ZFS_AV_QUARANTINED) != 0)) { 3242 need_policy = TRUE; 3243 } else { 3244 XVA_CLR_REQ(xvap, XAT_AV_QUARANTINED); 3245 XVA_SET_REQ(&tmpxvattr, XAT_AV_QUARANTINED); 3246 } 3247 } 3248 3249 if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) { 3250 mutex_exit(&zp->z_lock); 3251 ZFS_EXIT(zfsvfs); 3252 return (SET_ERROR(EPERM)); 3253 } 3254 3255 if (need_policy == FALSE && 3256 (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) || 3257 XVA_ISSET_REQ(xvap, XAT_OPAQUE))) { 3258 need_policy = TRUE; 3259 } 3260 } 3261 3262 mutex_exit(&zp->z_lock); 3263 3264 if (mask & AT_MODE) { 3265 if (zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr) == 0) { 3266 err = secpolicy_setid_setsticky_clear(vp, vap, 3267 &oldva, cr); 3268 if (err) { 3269 ZFS_EXIT(zfsvfs); 3270 return (err); 3271 } 3272 trim_mask |= AT_MODE; 3273 } else { 3274 need_policy = TRUE; 3275 } 3276 } 3277 3278 if (need_policy) { 3279 /* 3280 * If trim_mask is set then take ownership 3281 * has been granted or write_acl is present and user 3282 * has the ability to modify mode. In that case remove 3283 * UID|GID and or MODE from mask so that 3284 * secpolicy_vnode_setattr() doesn't revoke it. 3285 */ 3286 3287 if (trim_mask) { 3288 saved_mask = vap->va_mask; 3289 vap->va_mask &= ~trim_mask; 3290 if (trim_mask & AT_MODE) { 3291 /* 3292 * Save the mode, as secpolicy_vnode_setattr() 3293 * will overwrite it with ova.va_mode. 3294 */ 3295 saved_mode = vap->va_mode; 3296 } 3297 } 3298 err = secpolicy_vnode_setattr(cr, vp, vap, &oldva, flags, 3299 (int (*)(void *, int, cred_t *))zfs_zaccess_unix, zp); 3300 if (err) { 3301 ZFS_EXIT(zfsvfs); 3302 return (err); 3303 } 3304 3305 if (trim_mask) { 3306 vap->va_mask |= saved_mask; 3307 if (trim_mask & AT_MODE) { 3308 /* 3309 * Recover the mode after 3310 * secpolicy_vnode_setattr(). 3311 */ 3312 vap->va_mode = saved_mode; 3313 } 3314 } 3315 } 3316 3317 /* 3318 * secpolicy_vnode_setattr, or take ownership may have 3319 * changed va_mask 3320 */ 3321 mask = vap->va_mask; 3322 3323 if ((mask & (AT_UID | AT_GID))) { 3324 err = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs), 3325 &xattr_obj, sizeof (xattr_obj)); 3326 3327 if (err == 0 && xattr_obj) { 3328 err = zfs_zget(zp->z_zfsvfs, xattr_obj, &attrzp); 3329 if (err) 3330 goto out2; 3331 } 3332 if (mask & AT_UID) { 3333 new_uid = zfs_fuid_create(zfsvfs, 3334 (uint64_t)vap->va_uid, cr, ZFS_OWNER, &fuidp); 3335 if (new_uid != zp->z_uid && 3336 zfs_fuid_overquota(zfsvfs, B_FALSE, new_uid)) { 3337 if (attrzp) 3338 VN_RELE(ZTOV(attrzp)); 3339 err = SET_ERROR(EDQUOT); 3340 goto out2; 3341 } 3342 } 3343 3344 if (mask & AT_GID) { 3345 new_gid = zfs_fuid_create(zfsvfs, (uint64_t)vap->va_gid, 3346 cr, ZFS_GROUP, &fuidp); 3347 if (new_gid != zp->z_gid && 3348 zfs_fuid_overquota(zfsvfs, B_TRUE, new_gid)) { 3349 if (attrzp) 3350 VN_RELE(ZTOV(attrzp)); 3351 err = SET_ERROR(EDQUOT); 3352 goto out2; 3353 } 3354 } 3355 } 3356 tx = dmu_tx_create(zfsvfs->z_os); 3357 3358 if (mask & AT_MODE) { 3359 uint64_t pmode = zp->z_mode; 3360 uint64_t acl_obj; 3361 new_mode = (pmode & S_IFMT) | (vap->va_mode & ~S_IFMT); 3362 3363 if (zp->z_zfsvfs->z_acl_mode == ZFS_ACL_RESTRICTED && 3364 !(zp->z_pflags & ZFS_ACL_TRIVIAL)) { 3365 err = SET_ERROR(EPERM); 3366 goto out; 3367 } 3368 3369 if (err = zfs_acl_chmod_setattr(zp, &aclp, new_mode)) 3370 goto out; 3371 3372 mutex_enter(&zp->z_lock); 3373 if (!zp->z_is_sa && ((acl_obj = zfs_external_acl(zp)) != 0)) { 3374 /* 3375 * Are we upgrading ACL from old V0 format 3376 * to V1 format? 3377 */ 3378 if (zfsvfs->z_version >= ZPL_VERSION_FUID && 3379 zfs_znode_acl_version(zp) == 3380 ZFS_ACL_VERSION_INITIAL) { 3381 dmu_tx_hold_free(tx, acl_obj, 0, 3382 DMU_OBJECT_END); 3383 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 3384 0, aclp->z_acl_bytes); 3385 } else { 3386 dmu_tx_hold_write(tx, acl_obj, 0, 3387 aclp->z_acl_bytes); 3388 } 3389 } else if (!zp->z_is_sa && aclp->z_acl_bytes > ZFS_ACE_SPACE) { 3390 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 3391 0, aclp->z_acl_bytes); 3392 } 3393 mutex_exit(&zp->z_lock); 3394 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); 3395 } else { 3396 if ((mask & AT_XVATTR) && 3397 XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) 3398 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); 3399 else 3400 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); 3401 } 3402 3403 if (attrzp) { 3404 dmu_tx_hold_sa(tx, attrzp->z_sa_hdl, B_FALSE); 3405 } 3406 3407 fuid_dirtied = zfsvfs->z_fuid_dirty; 3408 if (fuid_dirtied) 3409 zfs_fuid_txhold(zfsvfs, tx); 3410 3411 zfs_sa_upgrade_txholds(tx, zp); 3412 3413 err = dmu_tx_assign(tx, TXG_NOWAIT); 3414 if (err) { 3415 if (err == ERESTART) 3416 dmu_tx_wait(tx); 3417 goto out; 3418 } 3419 3420 count = 0; 3421 /* 3422 * Set each attribute requested. 3423 * We group settings according to the locks they need to acquire. 3424 * 3425 * Note: you cannot set ctime directly, although it will be 3426 * updated as a side-effect of calling this function. 3427 */ 3428 3429 3430 if (mask & (AT_UID|AT_GID|AT_MODE)) 3431 mutex_enter(&zp->z_acl_lock); 3432 mutex_enter(&zp->z_lock); 3433 3434 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL, 3435 &zp->z_pflags, sizeof (zp->z_pflags)); 3436 3437 if (attrzp) { 3438 if (mask & (AT_UID|AT_GID|AT_MODE)) 3439 mutex_enter(&attrzp->z_acl_lock); 3440 mutex_enter(&attrzp->z_lock); 3441 SA_ADD_BULK_ATTR(xattr_bulk, xattr_count, 3442 SA_ZPL_FLAGS(zfsvfs), NULL, &attrzp->z_pflags, 3443 sizeof (attrzp->z_pflags)); 3444 } 3445 3446 if (mask & (AT_UID|AT_GID)) { 3447 3448 if (mask & AT_UID) { 3449 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL, 3450 &new_uid, sizeof (new_uid)); 3451 zp->z_uid = new_uid; 3452 if (attrzp) { 3453 SA_ADD_BULK_ATTR(xattr_bulk, xattr_count, 3454 SA_ZPL_UID(zfsvfs), NULL, &new_uid, 3455 sizeof (new_uid)); 3456 attrzp->z_uid = new_uid; 3457 } 3458 } 3459 3460 if (mask & AT_GID) { 3461 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), 3462 NULL, &new_gid, sizeof (new_gid)); 3463 zp->z_gid = new_gid; 3464 if (attrzp) { 3465 SA_ADD_BULK_ATTR(xattr_bulk, xattr_count, 3466 SA_ZPL_GID(zfsvfs), NULL, &new_gid, 3467 sizeof (new_gid)); 3468 attrzp->z_gid = new_gid; 3469 } 3470 } 3471 if (!(mask & AT_MODE)) { 3472 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), 3473 NULL, &new_mode, sizeof (new_mode)); 3474 new_mode = zp->z_mode; 3475 } 3476 err = zfs_acl_chown_setattr(zp); 3477 ASSERT(err == 0); 3478 if (attrzp) { 3479 err = zfs_acl_chown_setattr(attrzp); 3480 ASSERT(err == 0); 3481 } 3482 } 3483 3484 if (mask & AT_MODE) { 3485 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, 3486 &new_mode, sizeof (new_mode)); 3487 zp->z_mode = new_mode; 3488 ASSERT3U((uintptr_t)aclp, !=, 0); 3489 err = zfs_aclset_common(zp, aclp, cr, tx); 3490 ASSERT0(err); 3491 if (zp->z_acl_cached) 3492 zfs_acl_free(zp->z_acl_cached); 3493 zp->z_acl_cached = aclp; 3494 aclp = NULL; 3495 } 3496 3497 3498 if (mask & AT_ATIME) { 3499 ZFS_TIME_ENCODE(&vap->va_atime, zp->z_atime); 3500 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL, 3501 &zp->z_atime, sizeof (zp->z_atime)); 3502 } 3503 3504 if (mask & AT_MTIME) { 3505 ZFS_TIME_ENCODE(&vap->va_mtime, mtime); 3506 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, 3507 mtime, sizeof (mtime)); 3508 } 3509 3510 /* XXX - shouldn't this be done *before* the ATIME/MTIME checks? */ 3511 if (mask & AT_SIZE && !(mask & AT_MTIME)) { 3512 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), 3513 NULL, mtime, sizeof (mtime)); 3514 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, 3515 &ctime, sizeof (ctime)); 3516 zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime, 3517 B_TRUE); 3518 } else if (mask != 0) { 3519 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, 3520 &ctime, sizeof (ctime)); 3521 zfs_tstamp_update_setup(zp, STATE_CHANGED, mtime, ctime, 3522 B_TRUE); 3523 if (attrzp) { 3524 SA_ADD_BULK_ATTR(xattr_bulk, xattr_count, 3525 SA_ZPL_CTIME(zfsvfs), NULL, 3526 &ctime, sizeof (ctime)); 3527 zfs_tstamp_update_setup(attrzp, STATE_CHANGED, 3528 mtime, ctime, B_TRUE); 3529 } 3530 } 3531 /* 3532 * Do this after setting timestamps to prevent timestamp 3533 * update from toggling bit 3534 */ 3535 3536 if (xoap && (mask & AT_XVATTR)) { 3537 3538 /* 3539 * restore trimmed off masks 3540 * so that return masks can be set for caller. 3541 */ 3542 3543 if (XVA_ISSET_REQ(&tmpxvattr, XAT_APPENDONLY)) { 3544 XVA_SET_REQ(xvap, XAT_APPENDONLY); 3545 } 3546 if (XVA_ISSET_REQ(&tmpxvattr, XAT_NOUNLINK)) { 3547 XVA_SET_REQ(xvap, XAT_NOUNLINK); 3548 } 3549 if (XVA_ISSET_REQ(&tmpxvattr, XAT_IMMUTABLE)) { 3550 XVA_SET_REQ(xvap, XAT_IMMUTABLE); 3551 } 3552 if (XVA_ISSET_REQ(&tmpxvattr, XAT_NODUMP)) { 3553 XVA_SET_REQ(xvap, XAT_NODUMP); 3554 } 3555 if (XVA_ISSET_REQ(&tmpxvattr, XAT_AV_MODIFIED)) { 3556 XVA_SET_REQ(xvap, XAT_AV_MODIFIED); 3557 } 3558 if (XVA_ISSET_REQ(&tmpxvattr, XAT_AV_QUARANTINED)) { 3559 XVA_SET_REQ(xvap, XAT_AV_QUARANTINED); 3560 } 3561 3562 if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) 3563 ASSERT(vp->v_type == VREG); 3564 3565 zfs_xvattr_set(zp, xvap, tx); 3566 } 3567 3568 if (fuid_dirtied) 3569 zfs_fuid_sync(zfsvfs, tx); 3570 3571 if (mask != 0) 3572 zfs_log_setattr(zilog, tx, TX_SETATTR, zp, vap, mask, fuidp); 3573 3574 mutex_exit(&zp->z_lock); 3575 if (mask & (AT_UID|AT_GID|AT_MODE)) 3576 mutex_exit(&zp->z_acl_lock); 3577 3578 if (attrzp) { 3579 if (mask & (AT_UID|AT_GID|AT_MODE)) 3580 mutex_exit(&attrzp->z_acl_lock); 3581 mutex_exit(&attrzp->z_lock); 3582 } 3583out: 3584 if (err == 0 && attrzp) { 3585 err2 = sa_bulk_update(attrzp->z_sa_hdl, xattr_bulk, 3586 xattr_count, tx); 3587 ASSERT(err2 == 0); 3588 } 3589 3590 if (attrzp) 3591 VN_RELE(ZTOV(attrzp)); 3592 3593 if (aclp) 3594 zfs_acl_free(aclp); 3595 3596 if (fuidp) { 3597 zfs_fuid_info_free(fuidp); 3598 fuidp = NULL; 3599 } 3600 3601 if (err) { 3602 dmu_tx_abort(tx); 3603 if (err == ERESTART) 3604 goto top; 3605 } else { 3606 err2 = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx); 3607 dmu_tx_commit(tx); 3608 } 3609 3610out2: 3611 if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 3612 zil_commit(zilog, 0); 3613 3614 ZFS_EXIT(zfsvfs); 3615 return (err); 3616} 3617 3618typedef struct zfs_zlock { 3619 krwlock_t *zl_rwlock; /* lock we acquired */ 3620 znode_t *zl_znode; /* znode we held */ 3621 struct zfs_zlock *zl_next; /* next in list */ 3622} zfs_zlock_t; 3623 3624/* 3625 * Drop locks and release vnodes that were held by zfs_rename_lock(). 3626 */ 3627static void 3628zfs_rename_unlock(zfs_zlock_t **zlpp) 3629{ 3630 zfs_zlock_t *zl; 3631 3632 while ((zl = *zlpp) != NULL) { 3633 if (zl->zl_znode != NULL) 3634 VN_RELE(ZTOV(zl->zl_znode)); 3635 rw_exit(zl->zl_rwlock); 3636 *zlpp = zl->zl_next; 3637 kmem_free(zl, sizeof (*zl)); 3638 } 3639} 3640 3641/* 3642 * Search back through the directory tree, using the ".." entries. 3643 * Lock each directory in the chain to prevent concurrent renames. 3644 * Fail any attempt to move a directory into one of its own descendants. 3645 * XXX - z_parent_lock can overlap with map or grow locks 3646 */ 3647static int 3648zfs_rename_lock(znode_t *szp, znode_t *tdzp, znode_t *sdzp, zfs_zlock_t **zlpp) 3649{ 3650 zfs_zlock_t *zl; 3651 znode_t *zp = tdzp; 3652 uint64_t rootid = zp->z_zfsvfs->z_root; 3653 uint64_t oidp = zp->z_id; 3654 krwlock_t *rwlp = &szp->z_parent_lock; 3655 krw_t rw = RW_WRITER; 3656 3657 /* 3658 * First pass write-locks szp and compares to zp->z_id. 3659 * Later passes read-lock zp and compare to zp->z_parent. 3660 */ 3661 do { 3662 if (!rw_tryenter(rwlp, rw)) { 3663 /* 3664 * Another thread is renaming in this path. 3665 * Note that if we are a WRITER, we don't have any 3666 * parent_locks held yet. 3667 */ 3668 if (rw == RW_READER && zp->z_id > szp->z_id) { 3669 /* 3670 * Drop our locks and restart 3671 */ 3672 zfs_rename_unlock(&zl); 3673 *zlpp = NULL; 3674 zp = tdzp; 3675 oidp = zp->z_id; 3676 rwlp = &szp->z_parent_lock; 3677 rw = RW_WRITER; 3678 continue; 3679 } else { 3680 /* 3681 * Wait for other thread to drop its locks 3682 */ 3683 rw_enter(rwlp, rw); 3684 } 3685 } 3686 3687 zl = kmem_alloc(sizeof (*zl), KM_SLEEP); 3688 zl->zl_rwlock = rwlp; 3689 zl->zl_znode = NULL; 3690 zl->zl_next = *zlpp; 3691 *zlpp = zl; 3692 3693 if (oidp == szp->z_id) /* We're a descendant of szp */ 3694 return (SET_ERROR(EINVAL)); 3695 3696 if (oidp == rootid) /* We've hit the top */ 3697 return (0); 3698 3699 if (rw == RW_READER) { /* i.e. not the first pass */ 3700 int error = zfs_zget(zp->z_zfsvfs, oidp, &zp); 3701 if (error) 3702 return (error); 3703 zl->zl_znode = zp; 3704 } 3705 (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(zp->z_zfsvfs), 3706 &oidp, sizeof (oidp)); 3707 rwlp = &zp->z_parent_lock; 3708 rw = RW_READER; 3709 3710 } while (zp->z_id != sdzp->z_id); 3711 3712 return (0); 3713} 3714 3715/* 3716 * Move an entry from the provided source directory to the target 3717 * directory. Change the entry name as indicated. 3718 * 3719 * IN: sdvp - Source directory containing the "old entry". 3720 * snm - Old entry name. 3721 * tdvp - Target directory to contain the "new entry". 3722 * tnm - New entry name. 3723 * cr - credentials of caller. 3724 * ct - caller context 3725 * flags - case flags 3726 * 3727 * RETURN: 0 on success, error code on failure. 3728 * 3729 * Timestamps: 3730 * sdvp,tdvp - ctime|mtime updated 3731 */ 3732/*ARGSUSED*/ 3733static int 3734zfs_rename(vnode_t *sdvp, char *snm, vnode_t *tdvp, char *tnm, cred_t *cr, 3735 caller_context_t *ct, int flags) 3736{ 3737 znode_t *tdzp, *szp, *tzp; 3738 znode_t *sdzp = VTOZ(sdvp); 3739 zfsvfs_t *zfsvfs = sdzp->z_zfsvfs; 3740 zilog_t *zilog; 3741 vnode_t *realvp; 3742 zfs_dirlock_t *sdl, *tdl; 3743 dmu_tx_t *tx; 3744 zfs_zlock_t *zl; 3745 int cmp, serr, terr; 3746 int error = 0; 3747 int zflg = 0; 3748 boolean_t waited = B_FALSE; 3749 3750 ZFS_ENTER(zfsvfs); 3751 ZFS_VERIFY_ZP(sdzp); 3752 zilog = zfsvfs->z_log; 3753 3754 /* 3755 * Make sure we have the real vp for the target directory. 3756 */ 3757 if (VOP_REALVP(tdvp, &realvp, ct) == 0) 3758 tdvp = realvp; 3759 3760 tdzp = VTOZ(tdvp); 3761 ZFS_VERIFY_ZP(tdzp); 3762 3763 /* 3764 * We check z_zfsvfs rather than v_vfsp here, because snapshots and the 3765 * ctldir appear to have the same v_vfsp. 3766 */ 3767 if (tdzp->z_zfsvfs != zfsvfs || zfsctl_is_node(tdvp)) { 3768 ZFS_EXIT(zfsvfs); 3769 return (SET_ERROR(EXDEV)); 3770 } 3771 3772 if (zfsvfs->z_utf8 && u8_validate(tnm, 3773 strlen(tnm), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 3774 ZFS_EXIT(zfsvfs); 3775 return (SET_ERROR(EILSEQ)); 3776 } 3777 3778 if (flags & FIGNORECASE) 3779 zflg |= ZCILOOK; 3780 3781top: 3782 szp = NULL; 3783 tzp = NULL; 3784 zl = NULL; 3785 3786 /* 3787 * This is to prevent the creation of links into attribute space 3788 * by renaming a linked file into/outof an attribute directory. 3789 * See the comment in zfs_link() for why this is considered bad. 3790 */ 3791 if ((tdzp->z_pflags & ZFS_XATTR) != (sdzp->z_pflags & ZFS_XATTR)) { 3792 ZFS_EXIT(zfsvfs); 3793 return (SET_ERROR(EINVAL)); 3794 } 3795 3796 /* 3797 * Lock source and target directory entries. To prevent deadlock, 3798 * a lock ordering must be defined. We lock the directory with 3799 * the smallest object id first, or if it's a tie, the one with 3800 * the lexically first name. 3801 */ 3802 if (sdzp->z_id < tdzp->z_id) { 3803 cmp = -1; 3804 } else if (sdzp->z_id > tdzp->z_id) { 3805 cmp = 1; 3806 } else { 3807 /* 3808 * First compare the two name arguments without 3809 * considering any case folding. 3810 */ 3811 int nofold = (zfsvfs->z_norm & ~U8_TEXTPREP_TOUPPER); 3812 3813 cmp = u8_strcmp(snm, tnm, 0, nofold, U8_UNICODE_LATEST, &error); 3814 ASSERT(error == 0 || !zfsvfs->z_utf8); 3815 if (cmp == 0) { 3816 /* 3817 * POSIX: "If the old argument and the new argument 3818 * both refer to links to the same existing file, 3819 * the rename() function shall return successfully 3820 * and perform no other action." 3821 */ 3822 ZFS_EXIT(zfsvfs); 3823 return (0); 3824 } 3825 /* 3826 * If the file system is case-folding, then we may 3827 * have some more checking to do. A case-folding file 3828 * system is either supporting mixed case sensitivity 3829 * access or is completely case-insensitive. Note 3830 * that the file system is always case preserving. 3831 * 3832 * In mixed sensitivity mode case sensitive behavior 3833 * is the default. FIGNORECASE must be used to 3834 * explicitly request case insensitive behavior. 3835 * 3836 * If the source and target names provided differ only 3837 * by case (e.g., a request to rename 'tim' to 'Tim'), 3838 * we will treat this as a special case in the 3839 * case-insensitive mode: as long as the source name 3840 * is an exact match, we will allow this to proceed as 3841 * a name-change request. 3842 */ 3843 if ((zfsvfs->z_case == ZFS_CASE_INSENSITIVE || 3844 (zfsvfs->z_case == ZFS_CASE_MIXED && 3845 flags & FIGNORECASE)) && 3846 u8_strcmp(snm, tnm, 0, zfsvfs->z_norm, U8_UNICODE_LATEST, 3847 &error) == 0) { 3848 /* 3849 * case preserving rename request, require exact 3850 * name matches 3851 */ 3852 zflg |= ZCIEXACT; 3853 zflg &= ~ZCILOOK; 3854 } 3855 } 3856 3857 /* 3858 * If the source and destination directories are the same, we should 3859 * grab the z_name_lock of that directory only once. 3860 */ 3861 if (sdzp == tdzp) { 3862 zflg |= ZHAVELOCK; 3863 rw_enter(&sdzp->z_name_lock, RW_READER); 3864 } 3865 3866 if (cmp < 0) { 3867 serr = zfs_dirent_lock(&sdl, sdzp, snm, &szp, 3868 ZEXISTS | zflg, NULL, NULL); 3869 terr = zfs_dirent_lock(&tdl, 3870 tdzp, tnm, &tzp, ZRENAMING | zflg, NULL, NULL); 3871 } else { 3872 terr = zfs_dirent_lock(&tdl, 3873 tdzp, tnm, &tzp, zflg, NULL, NULL); 3874 serr = zfs_dirent_lock(&sdl, 3875 sdzp, snm, &szp, ZEXISTS | ZRENAMING | zflg, 3876 NULL, NULL); 3877 } 3878 3879 if (serr) { 3880 /* 3881 * Source entry invalid or not there. 3882 */ 3883 if (!terr) { 3884 zfs_dirent_unlock(tdl); 3885 if (tzp) 3886 VN_RELE(ZTOV(tzp)); 3887 } 3888 3889 if (sdzp == tdzp) 3890 rw_exit(&sdzp->z_name_lock); 3891 3892 /* 3893 * FreeBSD: In OpenSolaris they only check if rename source is 3894 * ".." here, because "." is handled in their lookup. This is 3895 * not the case for FreeBSD, so we check for "." explicitly. 3896 */ 3897 if (strcmp(snm, ".") == 0 || strcmp(snm, "..") == 0) 3898 serr = SET_ERROR(EINVAL); 3899 ZFS_EXIT(zfsvfs); 3900 return (serr); 3901 } 3902 if (terr) { 3903 zfs_dirent_unlock(sdl); 3904 VN_RELE(ZTOV(szp)); 3905 3906 if (sdzp == tdzp) 3907 rw_exit(&sdzp->z_name_lock); 3908 3909 if (strcmp(tnm, "..") == 0) 3910 terr = SET_ERROR(EINVAL); 3911 ZFS_EXIT(zfsvfs); 3912 return (terr); 3913 } 3914 3915 /* 3916 * Must have write access at the source to remove the old entry 3917 * and write access at the target to create the new entry. 3918 * Note that if target and source are the same, this can be 3919 * done in a single check. 3920 */ 3921 3922 if (error = zfs_zaccess_rename(sdzp, szp, tdzp, tzp, cr)) 3923 goto out; 3924 3925 if (ZTOV(szp)->v_type == VDIR) { 3926 /* 3927 * Check to make sure rename is valid. 3928 * Can't do a move like this: /usr/a/b to /usr/a/b/c/d 3929 */ 3930 if (error = zfs_rename_lock(szp, tdzp, sdzp, &zl)) 3931 goto out; 3932 } 3933 3934 /* 3935 * Does target exist? 3936 */ 3937 if (tzp) { 3938 /* 3939 * Source and target must be the same type. 3940 */ 3941 if (ZTOV(szp)->v_type == VDIR) { 3942 if (ZTOV(tzp)->v_type != VDIR) { 3943 error = SET_ERROR(ENOTDIR); 3944 goto out; 3945 } 3946 } else { 3947 if (ZTOV(tzp)->v_type == VDIR) { 3948 error = SET_ERROR(EISDIR); 3949 goto out; 3950 } 3951 } 3952 /* 3953 * POSIX dictates that when the source and target 3954 * entries refer to the same file object, rename 3955 * must do nothing and exit without error. 3956 */ 3957 if (szp->z_id == tzp->z_id) { 3958 error = 0; 3959 goto out; 3960 } 3961 } 3962 3963 vnevent_rename_src(ZTOV(szp), sdvp, snm, ct); 3964 if (tzp) 3965 vnevent_rename_dest(ZTOV(tzp), tdvp, tnm, ct); 3966 3967 /* 3968 * notify the target directory if it is not the same 3969 * as source directory. 3970 */ 3971 if (tdvp != sdvp) { 3972 vnevent_rename_dest_dir(tdvp, ct); 3973 } 3974 3975 tx = dmu_tx_create(zfsvfs->z_os); 3976 dmu_tx_hold_sa(tx, szp->z_sa_hdl, B_FALSE); 3977 dmu_tx_hold_sa(tx, sdzp->z_sa_hdl, B_FALSE); 3978 dmu_tx_hold_zap(tx, sdzp->z_id, FALSE, snm); 3979 dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, tnm); 3980 if (sdzp != tdzp) { 3981 dmu_tx_hold_sa(tx, tdzp->z_sa_hdl, B_FALSE); 3982 zfs_sa_upgrade_txholds(tx, tdzp); 3983 } 3984 if (tzp) { 3985 dmu_tx_hold_sa(tx, tzp->z_sa_hdl, B_FALSE); 3986 zfs_sa_upgrade_txholds(tx, tzp); 3987 } 3988 3989 zfs_sa_upgrade_txholds(tx, szp); 3990 dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 3991 error = dmu_tx_assign(tx, waited ? TXG_WAITED : TXG_NOWAIT); 3992 if (error) { 3993 if (zl != NULL) 3994 zfs_rename_unlock(&zl); 3995 zfs_dirent_unlock(sdl); 3996 zfs_dirent_unlock(tdl); 3997 3998 if (sdzp == tdzp) 3999 rw_exit(&sdzp->z_name_lock); 4000 4001 VN_RELE(ZTOV(szp)); 4002 if (tzp) 4003 VN_RELE(ZTOV(tzp)); 4004 if (error == ERESTART) { 4005 waited = B_TRUE; 4006 dmu_tx_wait(tx); 4007 dmu_tx_abort(tx); 4008 goto top; 4009 } 4010 dmu_tx_abort(tx); 4011 ZFS_EXIT(zfsvfs); 4012 return (error); 4013 } 4014 4015 if (tzp) /* Attempt to remove the existing target */ 4016 error = zfs_link_destroy(tdl, tzp, tx, zflg, NULL); 4017 4018 if (error == 0) { 4019 error = zfs_link_create(tdl, szp, tx, ZRENAMING); 4020 if (error == 0) { 4021 szp->z_pflags |= ZFS_AV_MODIFIED; 4022 4023 error = sa_update(szp->z_sa_hdl, SA_ZPL_FLAGS(zfsvfs), 4024 (void *)&szp->z_pflags, sizeof (uint64_t), tx); 4025 ASSERT0(error); 4026 4027 error = zfs_link_destroy(sdl, szp, tx, ZRENAMING, NULL); 4028 if (error == 0) { 4029 zfs_log_rename(zilog, tx, TX_RENAME | 4030 (flags & FIGNORECASE ? TX_CI : 0), sdzp, 4031 sdl->dl_name, tdzp, tdl->dl_name, szp); 4032 4033 /* 4034 * Update path information for the target vnode 4035 */ 4036 vn_renamepath(tdvp, ZTOV(szp), tnm, 4037 strlen(tnm)); 4038 } else { 4039 /* 4040 * At this point, we have successfully created 4041 * the target name, but have failed to remove 4042 * the source name. Since the create was done 4043 * with the ZRENAMING flag, there are 4044 * complications; for one, the link count is 4045 * wrong. The easiest way to deal with this 4046 * is to remove the newly created target, and 4047 * return the original error. This must 4048 * succeed; fortunately, it is very unlikely to 4049 * fail, since we just created it. 4050 */ 4051 VERIFY3U(zfs_link_destroy(tdl, szp, tx, 4052 ZRENAMING, NULL), ==, 0); 4053 } 4054 } 4055#ifdef FREEBSD_NAMECACHE 4056 if (error == 0) { 4057 cache_purge(sdvp); 4058 cache_purge(tdvp); 4059 cache_purge(ZTOV(szp)); 4060 if (tzp) 4061 cache_purge(ZTOV(tzp)); 4062 } 4063#endif 4064 } 4065 4066 dmu_tx_commit(tx); 4067out: 4068 if (zl != NULL) 4069 zfs_rename_unlock(&zl); 4070 4071 zfs_dirent_unlock(sdl); 4072 zfs_dirent_unlock(tdl); 4073 4074 if (sdzp == tdzp) 4075 rw_exit(&sdzp->z_name_lock); 4076 4077 4078 VN_RELE(ZTOV(szp)); 4079 if (tzp) 4080 VN_RELE(ZTOV(tzp)); 4081 4082 if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 4083 zil_commit(zilog, 0); 4084 4085 ZFS_EXIT(zfsvfs); 4086 4087 return (error); 4088} 4089 4090/* 4091 * Insert the indicated symbolic reference entry into the directory. 4092 * 4093 * IN: dvp - Directory to contain new symbolic link. 4094 * link - Name for new symlink entry. 4095 * vap - Attributes of new entry. 4096 * cr - credentials of caller. 4097 * ct - caller context 4098 * flags - case flags 4099 * 4100 * RETURN: 0 on success, error code on failure. 4101 * 4102 * Timestamps: 4103 * dvp - ctime|mtime updated 4104 */ 4105/*ARGSUSED*/ 4106static int 4107zfs_symlink(vnode_t *dvp, vnode_t **vpp, char *name, vattr_t *vap, char *link, 4108 cred_t *cr, kthread_t *td) 4109{ 4110 znode_t *zp, *dzp = VTOZ(dvp); 4111 zfs_dirlock_t *dl; 4112 dmu_tx_t *tx; 4113 zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 4114 zilog_t *zilog; 4115 uint64_t len = strlen(link); 4116 int error; 4117 int zflg = ZNEW; 4118 zfs_acl_ids_t acl_ids; 4119 boolean_t fuid_dirtied; 4120 uint64_t txtype = TX_SYMLINK; 4121 boolean_t waited = B_FALSE; 4122 int flags = 0; 4123 4124 ASSERT(vap->va_type == VLNK); 4125 4126 ZFS_ENTER(zfsvfs); 4127 ZFS_VERIFY_ZP(dzp); 4128 zilog = zfsvfs->z_log; 4129 4130 if (zfsvfs->z_utf8 && u8_validate(name, strlen(name), 4131 NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 4132 ZFS_EXIT(zfsvfs); 4133 return (SET_ERROR(EILSEQ)); 4134 } 4135 if (flags & FIGNORECASE) 4136 zflg |= ZCILOOK; 4137 4138 if (len > MAXPATHLEN) { 4139 ZFS_EXIT(zfsvfs); 4140 return (SET_ERROR(ENAMETOOLONG)); 4141 } 4142 4143 if ((error = zfs_acl_ids_create(dzp, 0, 4144 vap, cr, NULL, &acl_ids)) != 0) { 4145 ZFS_EXIT(zfsvfs); 4146 return (error); 4147 } 4148top: 4149 /* 4150 * Attempt to lock directory; fail if entry already exists. 4151 */ 4152 error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, NULL, NULL); 4153 if (error) { 4154 zfs_acl_ids_free(&acl_ids); 4155 ZFS_EXIT(zfsvfs); 4156 return (error); 4157 } 4158 4159 if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 4160 zfs_acl_ids_free(&acl_ids); 4161 zfs_dirent_unlock(dl); 4162 ZFS_EXIT(zfsvfs); 4163 return (error); 4164 } 4165 4166 if (zfs_acl_ids_overquota(zfsvfs, &acl_ids)) { 4167 zfs_acl_ids_free(&acl_ids); 4168 zfs_dirent_unlock(dl); 4169 ZFS_EXIT(zfsvfs); 4170 return (SET_ERROR(EDQUOT)); 4171 } 4172 tx = dmu_tx_create(zfsvfs->z_os); 4173 fuid_dirtied = zfsvfs->z_fuid_dirty; 4174 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, MAX(1, len)); 4175 dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 4176 dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes + 4177 ZFS_SA_BASE_ATTR_SIZE + len); 4178 dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE); 4179 if (!zfsvfs->z_use_sa && acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) { 4180 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 4181 acl_ids.z_aclp->z_acl_bytes); 4182 } 4183 if (fuid_dirtied) 4184 zfs_fuid_txhold(zfsvfs, tx); 4185 error = dmu_tx_assign(tx, waited ? TXG_WAITED : TXG_NOWAIT); 4186 if (error) { 4187 zfs_dirent_unlock(dl); 4188 if (error == ERESTART) { 4189 waited = B_TRUE; 4190 dmu_tx_wait(tx); 4191 dmu_tx_abort(tx); 4192 goto top; 4193 } 4194 zfs_acl_ids_free(&acl_ids); 4195 dmu_tx_abort(tx); 4196 ZFS_EXIT(zfsvfs); 4197 return (error); 4198 } 4199 4200 /* 4201 * Create a new object for the symlink. 4202 * for version 4 ZPL datsets the symlink will be an SA attribute 4203 */ 4204 zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids); 4205 4206 if (fuid_dirtied) 4207 zfs_fuid_sync(zfsvfs, tx); 4208 4209 mutex_enter(&zp->z_lock); 4210 if (zp->z_is_sa) 4211 error = sa_update(zp->z_sa_hdl, SA_ZPL_SYMLINK(zfsvfs), 4212 link, len, tx); 4213 else 4214 zfs_sa_symlink(zp, link, len, tx); 4215 mutex_exit(&zp->z_lock); 4216 4217 zp->z_size = len; 4218 (void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs), 4219 &zp->z_size, sizeof (zp->z_size), tx); 4220 /* 4221 * Insert the new object into the directory. 4222 */ 4223 (void) zfs_link_create(dl, zp, tx, ZNEW); 4224 4225 if (flags & FIGNORECASE) 4226 txtype |= TX_CI; 4227 zfs_log_symlink(zilog, tx, txtype, dzp, zp, name, link); 4228 *vpp = ZTOV(zp); 4229 4230 zfs_acl_ids_free(&acl_ids); 4231 4232 dmu_tx_commit(tx); 4233 4234 zfs_dirent_unlock(dl); 4235 4236 if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 4237 zil_commit(zilog, 0); 4238 4239 ZFS_EXIT(zfsvfs); 4240 return (error); 4241} 4242 4243/* 4244 * Return, in the buffer contained in the provided uio structure, 4245 * the symbolic path referred to by vp. 4246 * 4247 * IN: vp - vnode of symbolic link. 4248 * uio - structure to contain the link path. 4249 * cr - credentials of caller. 4250 * ct - caller context 4251 * 4252 * OUT: uio - structure containing the link path. 4253 * 4254 * RETURN: 0 on success, error code on failure. 4255 * 4256 * Timestamps: 4257 * vp - atime updated 4258 */ 4259/* ARGSUSED */ 4260static int 4261zfs_readlink(vnode_t *vp, uio_t *uio, cred_t *cr, caller_context_t *ct) 4262{ 4263 znode_t *zp = VTOZ(vp); 4264 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4265 int error; 4266 4267 ZFS_ENTER(zfsvfs); 4268 ZFS_VERIFY_ZP(zp); 4269 4270 mutex_enter(&zp->z_lock); 4271 if (zp->z_is_sa) 4272 error = sa_lookup_uio(zp->z_sa_hdl, 4273 SA_ZPL_SYMLINK(zfsvfs), uio); 4274 else 4275 error = zfs_sa_readlink(zp, uio); 4276 mutex_exit(&zp->z_lock); 4277 4278 ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 4279 4280 ZFS_EXIT(zfsvfs); 4281 return (error); 4282} 4283 4284/* 4285 * Insert a new entry into directory tdvp referencing svp. 4286 * 4287 * IN: tdvp - Directory to contain new entry. 4288 * svp - vnode of new entry. 4289 * name - name of new entry. 4290 * cr - credentials of caller. 4291 * ct - caller context 4292 * 4293 * RETURN: 0 on success, error code on failure. 4294 * 4295 * Timestamps: 4296 * tdvp - ctime|mtime updated 4297 * svp - ctime updated 4298 */ 4299/* ARGSUSED */ 4300static int 4301zfs_link(vnode_t *tdvp, vnode_t *svp, char *name, cred_t *cr, 4302 caller_context_t *ct, int flags) 4303{ 4304 znode_t *dzp = VTOZ(tdvp); 4305 znode_t *tzp, *szp; 4306 zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 4307 zilog_t *zilog; 4308 zfs_dirlock_t *dl; 4309 dmu_tx_t *tx; 4310 vnode_t *realvp; 4311 int error; 4312 int zf = ZNEW; 4313 uint64_t parent; 4314 uid_t owner; 4315 boolean_t waited = B_FALSE; 4316 4317 ASSERT(tdvp->v_type == VDIR); 4318 4319 ZFS_ENTER(zfsvfs); 4320 ZFS_VERIFY_ZP(dzp); 4321 zilog = zfsvfs->z_log; 4322 4323 if (VOP_REALVP(svp, &realvp, ct) == 0) 4324 svp = realvp; 4325 4326 /* 4327 * POSIX dictates that we return EPERM here. 4328 * Better choices include ENOTSUP or EISDIR. 4329 */ 4330 if (svp->v_type == VDIR) { 4331 ZFS_EXIT(zfsvfs); 4332 return (SET_ERROR(EPERM)); 4333 } 4334 4335 szp = VTOZ(svp); 4336 ZFS_VERIFY_ZP(szp); 4337 4338 /* 4339 * We check z_zfsvfs rather than v_vfsp here, because snapshots and the 4340 * ctldir appear to have the same v_vfsp. 4341 */ 4342 if (szp->z_zfsvfs != zfsvfs || zfsctl_is_node(svp)) { 4343 ZFS_EXIT(zfsvfs); 4344 return (SET_ERROR(EXDEV)); 4345 } 4346 4347 /* Prevent links to .zfs/shares files */ 4348 4349 if ((error = sa_lookup(szp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs), 4350 &parent, sizeof (uint64_t))) != 0) { 4351 ZFS_EXIT(zfsvfs); 4352 return (error); 4353 } 4354 if (parent == zfsvfs->z_shares_dir) { 4355 ZFS_EXIT(zfsvfs); 4356 return (SET_ERROR(EPERM)); 4357 } 4358 4359 if (zfsvfs->z_utf8 && u8_validate(name, 4360 strlen(name), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 4361 ZFS_EXIT(zfsvfs); 4362 return (SET_ERROR(EILSEQ)); 4363 } 4364 if (flags & FIGNORECASE) 4365 zf |= ZCILOOK; 4366 4367 /* 4368 * We do not support links between attributes and non-attributes 4369 * because of the potential security risk of creating links 4370 * into "normal" file space in order to circumvent restrictions 4371 * imposed in attribute space. 4372 */ 4373 if ((szp->z_pflags & ZFS_XATTR) != (dzp->z_pflags & ZFS_XATTR)) { 4374 ZFS_EXIT(zfsvfs); 4375 return (SET_ERROR(EINVAL)); 4376 } 4377 4378 4379 owner = zfs_fuid_map_id(zfsvfs, szp->z_uid, cr, ZFS_OWNER); 4380 if (owner != crgetuid(cr) && secpolicy_basic_link(svp, cr) != 0) { 4381 ZFS_EXIT(zfsvfs); 4382 return (SET_ERROR(EPERM)); 4383 } 4384 4385 if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 4386 ZFS_EXIT(zfsvfs); 4387 return (error); 4388 } 4389 4390top: 4391 /* 4392 * Attempt to lock directory; fail if entry already exists. 4393 */ 4394 error = zfs_dirent_lock(&dl, dzp, name, &tzp, zf, NULL, NULL); 4395 if (error) { 4396 ZFS_EXIT(zfsvfs); 4397 return (error); 4398 } 4399 4400 tx = dmu_tx_create(zfsvfs->z_os); 4401 dmu_tx_hold_sa(tx, szp->z_sa_hdl, B_FALSE); 4402 dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 4403 zfs_sa_upgrade_txholds(tx, szp); 4404 zfs_sa_upgrade_txholds(tx, dzp); 4405 error = dmu_tx_assign(tx, waited ? TXG_WAITED : TXG_NOWAIT); 4406 if (error) { 4407 zfs_dirent_unlock(dl); 4408 if (error == ERESTART) { 4409 waited = B_TRUE; 4410 dmu_tx_wait(tx); 4411 dmu_tx_abort(tx); 4412 goto top; 4413 } 4414 dmu_tx_abort(tx); 4415 ZFS_EXIT(zfsvfs); 4416 return (error); 4417 } 4418 4419 error = zfs_link_create(dl, szp, tx, 0); 4420 4421 if (error == 0) { 4422 uint64_t txtype = TX_LINK; 4423 if (flags & FIGNORECASE) 4424 txtype |= TX_CI; 4425 zfs_log_link(zilog, tx, txtype, dzp, szp, name); 4426 } 4427 4428 dmu_tx_commit(tx); 4429 4430 zfs_dirent_unlock(dl); 4431 4432 if (error == 0) { 4433 vnevent_link(svp, ct); 4434 } 4435 4436 if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 4437 zil_commit(zilog, 0); 4438 4439 ZFS_EXIT(zfsvfs); 4440 return (error); 4441} 4442 4443#ifdef sun 4444/* 4445 * zfs_null_putapage() is used when the file system has been force 4446 * unmounted. It just drops the pages. 4447 */ 4448/* ARGSUSED */ 4449static int 4450zfs_null_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, 4451 size_t *lenp, int flags, cred_t *cr) 4452{ 4453 pvn_write_done(pp, B_INVAL|B_FORCE|B_ERROR); 4454 return (0); 4455} 4456 4457/* 4458 * Push a page out to disk, klustering if possible. 4459 * 4460 * IN: vp - file to push page to. 4461 * pp - page to push. 4462 * flags - additional flags. 4463 * cr - credentials of caller. 4464 * 4465 * OUT: offp - start of range pushed. 4466 * lenp - len of range pushed. 4467 * 4468 * RETURN: 0 on success, error code on failure. 4469 * 4470 * NOTE: callers must have locked the page to be pushed. On 4471 * exit, the page (and all other pages in the kluster) must be 4472 * unlocked. 4473 */ 4474/* ARGSUSED */ 4475static int 4476zfs_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, 4477 size_t *lenp, int flags, cred_t *cr) 4478{ 4479 znode_t *zp = VTOZ(vp); 4480 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4481 dmu_tx_t *tx; 4482 u_offset_t off, koff; 4483 size_t len, klen; 4484 int err; 4485 4486 off = pp->p_offset; 4487 len = PAGESIZE; 4488 /* 4489 * If our blocksize is bigger than the page size, try to kluster 4490 * multiple pages so that we write a full block (thus avoiding 4491 * a read-modify-write). 4492 */ 4493 if (off < zp->z_size && zp->z_blksz > PAGESIZE) { 4494 klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE); 4495 koff = ISP2(klen) ? P2ALIGN(off, (u_offset_t)klen) : 0; 4496 ASSERT(koff <= zp->z_size); 4497 if (koff + klen > zp->z_size) 4498 klen = P2ROUNDUP(zp->z_size - koff, (uint64_t)PAGESIZE); 4499 pp = pvn_write_kluster(vp, pp, &off, &len, koff, klen, flags); 4500 } 4501 ASSERT3U(btop(len), ==, btopr(len)); 4502 4503 /* 4504 * Can't push pages past end-of-file. 4505 */ 4506 if (off >= zp->z_size) { 4507 /* ignore all pages */ 4508 err = 0; 4509 goto out; 4510 } else if (off + len > zp->z_size) { 4511 int npages = btopr(zp->z_size - off); 4512 page_t *trunc; 4513 4514 page_list_break(&pp, &trunc, npages); 4515 /* ignore pages past end of file */ 4516 if (trunc) 4517 pvn_write_done(trunc, flags); 4518 len = zp->z_size - off; 4519 } 4520 4521 if (zfs_owner_overquota(zfsvfs, zp, B_FALSE) || 4522 zfs_owner_overquota(zfsvfs, zp, B_TRUE)) { 4523 err = SET_ERROR(EDQUOT); 4524 goto out; 4525 } 4526top: 4527 tx = dmu_tx_create(zfsvfs->z_os); 4528 dmu_tx_hold_write(tx, zp->z_id, off, len); 4529 4530 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); 4531 zfs_sa_upgrade_txholds(tx, zp); 4532 err = dmu_tx_assign(tx, TXG_NOWAIT); 4533 if (err != 0) { 4534 if (err == ERESTART) { 4535 dmu_tx_wait(tx); 4536 dmu_tx_abort(tx); 4537 goto top; 4538 } 4539 dmu_tx_abort(tx); 4540 goto out; 4541 } 4542 4543 if (zp->z_blksz <= PAGESIZE) { 4544 caddr_t va = zfs_map_page(pp, S_READ); 4545 ASSERT3U(len, <=, PAGESIZE); 4546 dmu_write(zfsvfs->z_os, zp->z_id, off, len, va, tx); 4547 zfs_unmap_page(pp, va); 4548 } else { 4549 err = dmu_write_pages(zfsvfs->z_os, zp->z_id, off, len, pp, tx); 4550 } 4551 4552 if (err == 0) { 4553 uint64_t mtime[2], ctime[2]; 4554 sa_bulk_attr_t bulk[3]; 4555 int count = 0; 4556 4557 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, 4558 &mtime, 16); 4559 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, 4560 &ctime, 16); 4561 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL, 4562 &zp->z_pflags, 8); 4563 zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime, 4564 B_TRUE); 4565 zfs_log_write(zfsvfs->z_log, tx, TX_WRITE, zp, off, len, 0); 4566 } 4567 dmu_tx_commit(tx); 4568 4569out: 4570 pvn_write_done(pp, (err ? B_ERROR : 0) | flags); 4571 if (offp) 4572 *offp = off; 4573 if (lenp) 4574 *lenp = len; 4575 4576 return (err); 4577} 4578 4579/* 4580 * Copy the portion of the file indicated from pages into the file. 4581 * The pages are stored in a page list attached to the files vnode. 4582 * 4583 * IN: vp - vnode of file to push page data to. 4584 * off - position in file to put data. 4585 * len - amount of data to write. 4586 * flags - flags to control the operation. 4587 * cr - credentials of caller. 4588 * ct - caller context. 4589 * 4590 * RETURN: 0 on success, error code on failure. 4591 * 4592 * Timestamps: 4593 * vp - ctime|mtime updated 4594 */ 4595/*ARGSUSED*/ 4596static int 4597zfs_putpage(vnode_t *vp, offset_t off, size_t len, int flags, cred_t *cr, 4598 caller_context_t *ct) 4599{ 4600 znode_t *zp = VTOZ(vp); 4601 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4602 page_t *pp; 4603 size_t io_len; 4604 u_offset_t io_off; 4605 uint_t blksz; 4606 rl_t *rl; 4607 int error = 0; 4608 4609 ZFS_ENTER(zfsvfs); 4610 ZFS_VERIFY_ZP(zp); 4611 4612 /* 4613 * Align this request to the file block size in case we kluster. 4614 * XXX - this can result in pretty aggresive locking, which can 4615 * impact simultanious read/write access. One option might be 4616 * to break up long requests (len == 0) into block-by-block 4617 * operations to get narrower locking. 4618 */ 4619 blksz = zp->z_blksz; 4620 if (ISP2(blksz)) 4621 io_off = P2ALIGN_TYPED(off, blksz, u_offset_t); 4622 else 4623 io_off = 0; 4624 if (len > 0 && ISP2(blksz)) 4625 io_len = P2ROUNDUP_TYPED(len + (off - io_off), blksz, size_t); 4626 else 4627 io_len = 0; 4628 4629 if (io_len == 0) { 4630 /* 4631 * Search the entire vp list for pages >= io_off. 4632 */ 4633 rl = zfs_range_lock(zp, io_off, UINT64_MAX, RL_WRITER); 4634 error = pvn_vplist_dirty(vp, io_off, zfs_putapage, flags, cr); 4635 goto out; 4636 } 4637 rl = zfs_range_lock(zp, io_off, io_len, RL_WRITER); 4638 4639 if (off > zp->z_size) { 4640 /* past end of file */ 4641 zfs_range_unlock(rl); 4642 ZFS_EXIT(zfsvfs); 4643 return (0); 4644 } 4645 4646 len = MIN(io_len, P2ROUNDUP(zp->z_size, PAGESIZE) - io_off); 4647 4648 for (off = io_off; io_off < off + len; io_off += io_len) { 4649 if ((flags & B_INVAL) || ((flags & B_ASYNC) == 0)) { 4650 pp = page_lookup(vp, io_off, 4651 (flags & (B_INVAL | B_FREE)) ? SE_EXCL : SE_SHARED); 4652 } else { 4653 pp = page_lookup_nowait(vp, io_off, 4654 (flags & B_FREE) ? SE_EXCL : SE_SHARED); 4655 } 4656 4657 if (pp != NULL && pvn_getdirty(pp, flags)) { 4658 int err; 4659 4660 /* 4661 * Found a dirty page to push 4662 */ 4663 err = zfs_putapage(vp, pp, &io_off, &io_len, flags, cr); 4664 if (err) 4665 error = err; 4666 } else { 4667 io_len = PAGESIZE; 4668 } 4669 } 4670out: 4671 zfs_range_unlock(rl); 4672 if ((flags & B_ASYNC) == 0 || zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 4673 zil_commit(zfsvfs->z_log, zp->z_id); 4674 ZFS_EXIT(zfsvfs); 4675 return (error); 4676} 4677#endif /* sun */ 4678 4679/*ARGSUSED*/ 4680void 4681zfs_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct) 4682{ 4683 znode_t *zp = VTOZ(vp); 4684 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4685 int error; 4686 4687 rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_READER); 4688 if (zp->z_sa_hdl == NULL) { 4689 /* 4690 * The fs has been unmounted, or we did a 4691 * suspend/resume and this file no longer exists. 4692 */ 4693 rw_exit(&zfsvfs->z_teardown_inactive_lock); 4694 vrecycle(vp); 4695 return; 4696 } 4697 4698 mutex_enter(&zp->z_lock); 4699 if (zp->z_unlinked) { 4700 /* 4701 * Fast path to recycle a vnode of a removed file. 4702 */ 4703 mutex_exit(&zp->z_lock); 4704 rw_exit(&zfsvfs->z_teardown_inactive_lock); 4705 vrecycle(vp); 4706 return; 4707 } 4708 mutex_exit(&zp->z_lock); 4709 4710 if (zp->z_atime_dirty && zp->z_unlinked == 0) { 4711 dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os); 4712 4713 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); 4714 zfs_sa_upgrade_txholds(tx, zp); 4715 error = dmu_tx_assign(tx, TXG_WAIT); 4716 if (error) { 4717 dmu_tx_abort(tx); 4718 } else { 4719 mutex_enter(&zp->z_lock); 4720 (void) sa_update(zp->z_sa_hdl, SA_ZPL_ATIME(zfsvfs), 4721 (void *)&zp->z_atime, sizeof (zp->z_atime), tx); 4722 zp->z_atime_dirty = 0; 4723 mutex_exit(&zp->z_lock); 4724 dmu_tx_commit(tx); 4725 } 4726 } 4727 rw_exit(&zfsvfs->z_teardown_inactive_lock); 4728} 4729 4730#ifdef sun 4731/* 4732 * Bounds-check the seek operation. 4733 * 4734 * IN: vp - vnode seeking within 4735 * ooff - old file offset 4736 * noffp - pointer to new file offset 4737 * ct - caller context 4738 * 4739 * RETURN: 0 on success, EINVAL if new offset invalid. 4740 */ 4741/* ARGSUSED */ 4742static int 4743zfs_seek(vnode_t *vp, offset_t ooff, offset_t *noffp, 4744 caller_context_t *ct) 4745{ 4746 if (vp->v_type == VDIR) 4747 return (0); 4748 return ((*noffp < 0 || *noffp > MAXOFFSET_T) ? EINVAL : 0); 4749} 4750 4751/* 4752 * Pre-filter the generic locking function to trap attempts to place 4753 * a mandatory lock on a memory mapped file. 4754 */ 4755static int 4756zfs_frlock(vnode_t *vp, int cmd, flock64_t *bfp, int flag, offset_t offset, 4757 flk_callback_t *flk_cbp, cred_t *cr, caller_context_t *ct) 4758{ 4759 znode_t *zp = VTOZ(vp); 4760 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4761 4762 ZFS_ENTER(zfsvfs); 4763 ZFS_VERIFY_ZP(zp); 4764 4765 /* 4766 * We are following the UFS semantics with respect to mapcnt 4767 * here: If we see that the file is mapped already, then we will 4768 * return an error, but we don't worry about races between this 4769 * function and zfs_map(). 4770 */ 4771 if (zp->z_mapcnt > 0 && MANDMODE(zp->z_mode)) { 4772 ZFS_EXIT(zfsvfs); 4773 return (SET_ERROR(EAGAIN)); 4774 } 4775 ZFS_EXIT(zfsvfs); 4776 return (fs_frlock(vp, cmd, bfp, flag, offset, flk_cbp, cr, ct)); 4777} 4778 4779/* 4780 * If we can't find a page in the cache, we will create a new page 4781 * and fill it with file data. For efficiency, we may try to fill 4782 * multiple pages at once (klustering) to fill up the supplied page 4783 * list. Note that the pages to be filled are held with an exclusive 4784 * lock to prevent access by other threads while they are being filled. 4785 */ 4786static int 4787zfs_fillpage(vnode_t *vp, u_offset_t off, struct seg *seg, 4788 caddr_t addr, page_t *pl[], size_t plsz, enum seg_rw rw) 4789{ 4790 znode_t *zp = VTOZ(vp); 4791 page_t *pp, *cur_pp; 4792 objset_t *os = zp->z_zfsvfs->z_os; 4793 u_offset_t io_off, total; 4794 size_t io_len; 4795 int err; 4796 4797 if (plsz == PAGESIZE || zp->z_blksz <= PAGESIZE) { 4798 /* 4799 * We only have a single page, don't bother klustering 4800 */ 4801 io_off = off; 4802 io_len = PAGESIZE; 4803 pp = page_create_va(vp, io_off, io_len, 4804 PG_EXCL | PG_WAIT, seg, addr); 4805 } else { 4806 /* 4807 * Try to find enough pages to fill the page list 4808 */ 4809 pp = pvn_read_kluster(vp, off, seg, addr, &io_off, 4810 &io_len, off, plsz, 0); 4811 } 4812 if (pp == NULL) { 4813 /* 4814 * The page already exists, nothing to do here. 4815 */ 4816 *pl = NULL; 4817 return (0); 4818 } 4819 4820 /* 4821 * Fill the pages in the kluster. 4822 */ 4823 cur_pp = pp; 4824 for (total = io_off + io_len; io_off < total; io_off += PAGESIZE) { 4825 caddr_t va; 4826 4827 ASSERT3U(io_off, ==, cur_pp->p_offset); 4828 va = zfs_map_page(cur_pp, S_WRITE); 4829 err = dmu_read(os, zp->z_id, io_off, PAGESIZE, va, 4830 DMU_READ_PREFETCH); 4831 zfs_unmap_page(cur_pp, va); 4832 if (err) { 4833 /* On error, toss the entire kluster */ 4834 pvn_read_done(pp, B_ERROR); 4835 /* convert checksum errors into IO errors */ 4836 if (err == ECKSUM) 4837 err = SET_ERROR(EIO); 4838 return (err); 4839 } 4840 cur_pp = cur_pp->p_next; 4841 } 4842 4843 /* 4844 * Fill in the page list array from the kluster starting 4845 * from the desired offset `off'. 4846 * NOTE: the page list will always be null terminated. 4847 */ 4848 pvn_plist_init(pp, pl, plsz, off, io_len, rw); 4849 ASSERT(pl == NULL || (*pl)->p_offset == off); 4850 4851 return (0); 4852} 4853 4854/* 4855 * Return pointers to the pages for the file region [off, off + len] 4856 * in the pl array. If plsz is greater than len, this function may 4857 * also return page pointers from after the specified region 4858 * (i.e. the region [off, off + plsz]). These additional pages are 4859 * only returned if they are already in the cache, or were created as 4860 * part of a klustered read. 4861 * 4862 * IN: vp - vnode of file to get data from. 4863 * off - position in file to get data from. 4864 * len - amount of data to retrieve. 4865 * plsz - length of provided page list. 4866 * seg - segment to obtain pages for. 4867 * addr - virtual address of fault. 4868 * rw - mode of created pages. 4869 * cr - credentials of caller. 4870 * ct - caller context. 4871 * 4872 * OUT: protp - protection mode of created pages. 4873 * pl - list of pages created. 4874 * 4875 * RETURN: 0 on success, error code on failure. 4876 * 4877 * Timestamps: 4878 * vp - atime updated 4879 */ 4880/* ARGSUSED */ 4881static int 4882zfs_getpage(vnode_t *vp, offset_t off, size_t len, uint_t *protp, 4883 page_t *pl[], size_t plsz, struct seg *seg, caddr_t addr, 4884 enum seg_rw rw, cred_t *cr, caller_context_t *ct) 4885{ 4886 znode_t *zp = VTOZ(vp); 4887 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4888 page_t **pl0 = pl; 4889 int err = 0; 4890 4891 /* we do our own caching, faultahead is unnecessary */ 4892 if (pl == NULL) 4893 return (0); 4894 else if (len > plsz) 4895 len = plsz; 4896 else 4897 len = P2ROUNDUP(len, PAGESIZE); 4898 ASSERT(plsz >= len); 4899 4900 ZFS_ENTER(zfsvfs); 4901 ZFS_VERIFY_ZP(zp); 4902 4903 if (protp) 4904 *protp = PROT_ALL; 4905 4906 /* 4907 * Loop through the requested range [off, off + len) looking 4908 * for pages. If we don't find a page, we will need to create 4909 * a new page and fill it with data from the file. 4910 */ 4911 while (len > 0) { 4912 if (*pl = page_lookup(vp, off, SE_SHARED)) 4913 *(pl+1) = NULL; 4914 else if (err = zfs_fillpage(vp, off, seg, addr, pl, plsz, rw)) 4915 goto out; 4916 while (*pl) { 4917 ASSERT3U((*pl)->p_offset, ==, off); 4918 off += PAGESIZE; 4919 addr += PAGESIZE; 4920 if (len > 0) { 4921 ASSERT3U(len, >=, PAGESIZE); 4922 len -= PAGESIZE; 4923 } 4924 ASSERT3U(plsz, >=, PAGESIZE); 4925 plsz -= PAGESIZE; 4926 pl++; 4927 } 4928 } 4929 4930 /* 4931 * Fill out the page array with any pages already in the cache. 4932 */ 4933 while (plsz > 0 && 4934 (*pl++ = page_lookup_nowait(vp, off, SE_SHARED))) { 4935 off += PAGESIZE; 4936 plsz -= PAGESIZE; 4937 } 4938out: 4939 if (err) { 4940 /* 4941 * Release any pages we have previously locked. 4942 */ 4943 while (pl > pl0) 4944 page_unlock(*--pl); 4945 } else { 4946 ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 4947 } 4948 4949 *pl = NULL; 4950 4951 ZFS_EXIT(zfsvfs); 4952 return (err); 4953} 4954 4955/* 4956 * Request a memory map for a section of a file. This code interacts 4957 * with common code and the VM system as follows: 4958 * 4959 * - common code calls mmap(), which ends up in smmap_common() 4960 * - this calls VOP_MAP(), which takes you into (say) zfs 4961 * - zfs_map() calls as_map(), passing segvn_create() as the callback 4962 * - segvn_create() creates the new segment and calls VOP_ADDMAP() 4963 * - zfs_addmap() updates z_mapcnt 4964 */ 4965/*ARGSUSED*/ 4966static int 4967zfs_map(vnode_t *vp, offset_t off, struct as *as, caddr_t *addrp, 4968 size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr, 4969 caller_context_t *ct) 4970{ 4971 znode_t *zp = VTOZ(vp); 4972 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4973 segvn_crargs_t vn_a; 4974 int error; 4975 4976 ZFS_ENTER(zfsvfs); 4977 ZFS_VERIFY_ZP(zp); 4978 4979 if ((prot & PROT_WRITE) && (zp->z_pflags & 4980 (ZFS_IMMUTABLE | ZFS_READONLY | ZFS_APPENDONLY))) { 4981 ZFS_EXIT(zfsvfs); 4982 return (SET_ERROR(EPERM)); 4983 } 4984 4985 if ((prot & (PROT_READ | PROT_EXEC)) && 4986 (zp->z_pflags & ZFS_AV_QUARANTINED)) { 4987 ZFS_EXIT(zfsvfs); 4988 return (SET_ERROR(EACCES)); 4989 } 4990 4991 if (vp->v_flag & VNOMAP) { 4992 ZFS_EXIT(zfsvfs); 4993 return (SET_ERROR(ENOSYS)); 4994 } 4995 4996 if (off < 0 || len > MAXOFFSET_T - off) { 4997 ZFS_EXIT(zfsvfs); 4998 return (SET_ERROR(ENXIO)); 4999 } 5000 5001 if (vp->v_type != VREG) { 5002 ZFS_EXIT(zfsvfs); 5003 return (SET_ERROR(ENODEV)); 5004 } 5005 5006 /* 5007 * If file is locked, disallow mapping. 5008 */ 5009 if (MANDMODE(zp->z_mode) && vn_has_flocks(vp)) { 5010 ZFS_EXIT(zfsvfs); 5011 return (SET_ERROR(EAGAIN)); 5012 } 5013 5014 as_rangelock(as); 5015 error = choose_addr(as, addrp, len, off, ADDR_VACALIGN, flags); 5016 if (error != 0) { 5017 as_rangeunlock(as); 5018 ZFS_EXIT(zfsvfs); 5019 return (error); 5020 } 5021 5022 vn_a.vp = vp; 5023 vn_a.offset = (u_offset_t)off; 5024 vn_a.type = flags & MAP_TYPE; 5025 vn_a.prot = prot; 5026 vn_a.maxprot = maxprot; 5027 vn_a.cred = cr; 5028 vn_a.amp = NULL; 5029 vn_a.flags = flags & ~MAP_TYPE; 5030 vn_a.szc = 0; 5031 vn_a.lgrp_mem_policy_flags = 0; 5032 5033 error = as_map(as, *addrp, len, segvn_create, &vn_a); 5034 5035 as_rangeunlock(as); 5036 ZFS_EXIT(zfsvfs); 5037 return (error); 5038} 5039 5040/* ARGSUSED */ 5041static int 5042zfs_addmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 5043 size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr, 5044 caller_context_t *ct) 5045{ 5046 uint64_t pages = btopr(len); 5047 5048 atomic_add_64(&VTOZ(vp)->z_mapcnt, pages); 5049 return (0); 5050} 5051 5052/* 5053 * The reason we push dirty pages as part of zfs_delmap() is so that we get a 5054 * more accurate mtime for the associated file. Since we don't have a way of 5055 * detecting when the data was actually modified, we have to resort to 5056 * heuristics. If an explicit msync() is done, then we mark the mtime when the 5057 * last page is pushed. The problem occurs when the msync() call is omitted, 5058 * which by far the most common case: 5059 * 5060 * open() 5061 * mmap() 5062 * <modify memory> 5063 * munmap() 5064 * close() 5065 * <time lapse> 5066 * putpage() via fsflush 5067 * 5068 * If we wait until fsflush to come along, we can have a modification time that 5069 * is some arbitrary point in the future. In order to prevent this in the 5070 * common case, we flush pages whenever a (MAP_SHARED, PROT_WRITE) mapping is 5071 * torn down. 5072 */ 5073/* ARGSUSED */ 5074static int 5075zfs_delmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 5076 size_t len, uint_t prot, uint_t maxprot, uint_t flags, cred_t *cr, 5077 caller_context_t *ct) 5078{ 5079 uint64_t pages = btopr(len); 5080 5081 ASSERT3U(VTOZ(vp)->z_mapcnt, >=, pages); 5082 atomic_add_64(&VTOZ(vp)->z_mapcnt, -pages); 5083 5084 if ((flags & MAP_SHARED) && (prot & PROT_WRITE) && 5085 vn_has_cached_data(vp)) 5086 (void) VOP_PUTPAGE(vp, off, len, B_ASYNC, cr, ct); 5087 5088 return (0); 5089} 5090 5091/* 5092 * Free or allocate space in a file. Currently, this function only 5093 * supports the `F_FREESP' command. However, this command is somewhat 5094 * misnamed, as its functionality includes the ability to allocate as 5095 * well as free space. 5096 * 5097 * IN: vp - vnode of file to free data in. 5098 * cmd - action to take (only F_FREESP supported). 5099 * bfp - section of file to free/alloc. 5100 * flag - current file open mode flags. 5101 * offset - current file offset. 5102 * cr - credentials of caller [UNUSED]. 5103 * ct - caller context. 5104 * 5105 * RETURN: 0 on success, error code on failure. 5106 * 5107 * Timestamps: 5108 * vp - ctime|mtime updated 5109 */ 5110/* ARGSUSED */ 5111static int 5112zfs_space(vnode_t *vp, int cmd, flock64_t *bfp, int flag, 5113 offset_t offset, cred_t *cr, caller_context_t *ct) 5114{ 5115 znode_t *zp = VTOZ(vp); 5116 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 5117 uint64_t off, len; 5118 int error; 5119 5120 ZFS_ENTER(zfsvfs); 5121 ZFS_VERIFY_ZP(zp); 5122 5123 if (cmd != F_FREESP) { 5124 ZFS_EXIT(zfsvfs); 5125 return (SET_ERROR(EINVAL)); 5126 } 5127 5128 if (error = convoff(vp, bfp, 0, offset)) { 5129 ZFS_EXIT(zfsvfs); 5130 return (error); 5131 } 5132 5133 if (bfp->l_len < 0) { 5134 ZFS_EXIT(zfsvfs); 5135 return (SET_ERROR(EINVAL)); 5136 } 5137 5138 off = bfp->l_start; 5139 len = bfp->l_len; /* 0 means from off to end of file */ 5140 5141 error = zfs_freesp(zp, off, len, flag, TRUE); 5142 5143 ZFS_EXIT(zfsvfs); 5144 return (error); 5145} 5146#endif /* sun */ 5147 5148CTASSERT(sizeof(struct zfid_short) <= sizeof(struct fid)); 5149CTASSERT(sizeof(struct zfid_long) <= sizeof(struct fid)); 5150 5151/*ARGSUSED*/ 5152static int 5153zfs_fid(vnode_t *vp, fid_t *fidp, caller_context_t *ct) 5154{ 5155 znode_t *zp = VTOZ(vp); 5156 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 5157 uint32_t gen; 5158 uint64_t gen64; 5159 uint64_t object = zp->z_id; 5160 zfid_short_t *zfid; 5161 int size, i, error; 5162 5163 ZFS_ENTER(zfsvfs); 5164 ZFS_VERIFY_ZP(zp); 5165 5166 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zfsvfs), 5167 &gen64, sizeof (uint64_t))) != 0) { 5168 ZFS_EXIT(zfsvfs); 5169 return (error); 5170 } 5171 5172 gen = (uint32_t)gen64; 5173 5174 size = (zfsvfs->z_parent != zfsvfs) ? LONG_FID_LEN : SHORT_FID_LEN; 5175 5176#ifdef illumos 5177 if (fidp->fid_len < size) { 5178 fidp->fid_len = size; 5179 ZFS_EXIT(zfsvfs); 5180 return (SET_ERROR(ENOSPC)); 5181 } 5182#else 5183 fidp->fid_len = size; 5184#endif 5185 5186 zfid = (zfid_short_t *)fidp; 5187 5188 zfid->zf_len = size; 5189 5190 for (i = 0; i < sizeof (zfid->zf_object); i++) 5191 zfid->zf_object[i] = (uint8_t)(object >> (8 * i)); 5192 5193 /* Must have a non-zero generation number to distinguish from .zfs */ 5194 if (gen == 0) 5195 gen = 1; 5196 for (i = 0; i < sizeof (zfid->zf_gen); i++) 5197 zfid->zf_gen[i] = (uint8_t)(gen >> (8 * i)); 5198 5199 if (size == LONG_FID_LEN) { 5200 uint64_t objsetid = dmu_objset_id(zfsvfs->z_os); 5201 zfid_long_t *zlfid; 5202 5203 zlfid = (zfid_long_t *)fidp; 5204 5205 for (i = 0; i < sizeof (zlfid->zf_setid); i++) 5206 zlfid->zf_setid[i] = (uint8_t)(objsetid >> (8 * i)); 5207 5208 /* XXX - this should be the generation number for the objset */ 5209 for (i = 0; i < sizeof (zlfid->zf_setgen); i++) 5210 zlfid->zf_setgen[i] = 0; 5211 } 5212 5213 ZFS_EXIT(zfsvfs); 5214 return (0); 5215} 5216 5217static int 5218zfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr, 5219 caller_context_t *ct) 5220{ 5221 znode_t *zp, *xzp; 5222 zfsvfs_t *zfsvfs; 5223 zfs_dirlock_t *dl; 5224 int error; 5225 5226 switch (cmd) { 5227 case _PC_LINK_MAX: 5228 *valp = INT_MAX; 5229 return (0); 5230 5231 case _PC_FILESIZEBITS: 5232 *valp = 64; 5233 return (0); 5234#ifdef sun 5235 case _PC_XATTR_EXISTS: 5236 zp = VTOZ(vp); 5237 zfsvfs = zp->z_zfsvfs; 5238 ZFS_ENTER(zfsvfs); 5239 ZFS_VERIFY_ZP(zp); 5240 *valp = 0; 5241 error = zfs_dirent_lock(&dl, zp, "", &xzp, 5242 ZXATTR | ZEXISTS | ZSHARED, NULL, NULL); 5243 if (error == 0) { 5244 zfs_dirent_unlock(dl); 5245 if (!zfs_dirempty(xzp)) 5246 *valp = 1; 5247 VN_RELE(ZTOV(xzp)); 5248 } else if (error == ENOENT) { 5249 /* 5250 * If there aren't extended attributes, it's the 5251 * same as having zero of them. 5252 */ 5253 error = 0; 5254 } 5255 ZFS_EXIT(zfsvfs); 5256 return (error); 5257 5258 case _PC_SATTR_ENABLED: 5259 case _PC_SATTR_EXISTS: 5260 *valp = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) && 5261 (vp->v_type == VREG || vp->v_type == VDIR); 5262 return (0); 5263 5264 case _PC_ACCESS_FILTERING: 5265 *valp = vfs_has_feature(vp->v_vfsp, VFSFT_ACCESS_FILTER) && 5266 vp->v_type == VDIR; 5267 return (0); 5268 5269 case _PC_ACL_ENABLED: 5270 *valp = _ACL_ACE_ENABLED; 5271 return (0); 5272#endif /* sun */ 5273 case _PC_MIN_HOLE_SIZE: 5274 *valp = (int)SPA_MINBLOCKSIZE; 5275 return (0); 5276#ifdef sun 5277 case _PC_TIMESTAMP_RESOLUTION: 5278 /* nanosecond timestamp resolution */ 5279 *valp = 1L; 5280 return (0); 5281#endif /* sun */ 5282 case _PC_ACL_EXTENDED: 5283 *valp = 0; 5284 return (0); 5285 5286 case _PC_ACL_NFS4: 5287 *valp = 1; 5288 return (0); 5289 5290 case _PC_ACL_PATH_MAX: 5291 *valp = ACL_MAX_ENTRIES; 5292 return (0); 5293 5294 default: 5295 return (EOPNOTSUPP); 5296 } 5297} 5298 5299/*ARGSUSED*/ 5300static int 5301zfs_getsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr, 5302 caller_context_t *ct) 5303{ 5304 znode_t *zp = VTOZ(vp); 5305 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 5306 int error; 5307 boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 5308 5309 ZFS_ENTER(zfsvfs); 5310 ZFS_VERIFY_ZP(zp); 5311 error = zfs_getacl(zp, vsecp, skipaclchk, cr); 5312 ZFS_EXIT(zfsvfs); 5313 5314 return (error); 5315} 5316 5317/*ARGSUSED*/ 5318int 5319zfs_setsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr, 5320 caller_context_t *ct) 5321{ 5322 znode_t *zp = VTOZ(vp); 5323 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 5324 int error; 5325 boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 5326 zilog_t *zilog = zfsvfs->z_log; 5327 5328 ZFS_ENTER(zfsvfs); 5329 ZFS_VERIFY_ZP(zp); 5330 5331 error = zfs_setacl(zp, vsecp, skipaclchk, cr); 5332 5333 if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 5334 zil_commit(zilog, 0); 5335 5336 ZFS_EXIT(zfsvfs); 5337 return (error); 5338} 5339 5340#ifdef sun 5341/* 5342 * The smallest read we may consider to loan out an arcbuf. 5343 * This must be a power of 2. 5344 */ 5345int zcr_blksz_min = (1 << 10); /* 1K */ 5346/* 5347 * If set to less than the file block size, allow loaning out of an 5348 * arcbuf for a partial block read. This must be a power of 2. 5349 */ 5350int zcr_blksz_max = (1 << 17); /* 128K */ 5351 5352/*ARGSUSED*/ 5353static int 5354zfs_reqzcbuf(vnode_t *vp, enum uio_rw ioflag, xuio_t *xuio, cred_t *cr, 5355 caller_context_t *ct) 5356{ 5357 znode_t *zp = VTOZ(vp); 5358 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 5359 int max_blksz = zfsvfs->z_max_blksz; 5360 uio_t *uio = &xuio->xu_uio; 5361 ssize_t size = uio->uio_resid; 5362 offset_t offset = uio->uio_loffset; 5363 int blksz; 5364 int fullblk, i; 5365 arc_buf_t *abuf; 5366 ssize_t maxsize; 5367 int preamble, postamble; 5368 5369 if (xuio->xu_type != UIOTYPE_ZEROCOPY) 5370 return (SET_ERROR(EINVAL)); 5371 5372 ZFS_ENTER(zfsvfs); 5373 ZFS_VERIFY_ZP(zp); 5374 switch (ioflag) { 5375 case UIO_WRITE: 5376 /* 5377 * Loan out an arc_buf for write if write size is bigger than 5378 * max_blksz, and the file's block size is also max_blksz. 5379 */ 5380 blksz = max_blksz; 5381 if (size < blksz || zp->z_blksz != blksz) { 5382 ZFS_EXIT(zfsvfs); 5383 return (SET_ERROR(EINVAL)); 5384 } 5385 /* 5386 * Caller requests buffers for write before knowing where the 5387 * write offset might be (e.g. NFS TCP write). 5388 */ 5389 if (offset == -1) { 5390 preamble = 0; 5391 } else { 5392 preamble = P2PHASE(offset, blksz); 5393 if (preamble) { 5394 preamble = blksz - preamble; 5395 size -= preamble; 5396 } 5397 } 5398 5399 postamble = P2PHASE(size, blksz); 5400 size -= postamble; 5401 5402 fullblk = size / blksz; 5403 (void) dmu_xuio_init(xuio, 5404 (preamble != 0) + fullblk + (postamble != 0)); 5405 DTRACE_PROBE3(zfs_reqzcbuf_align, int, preamble, 5406 int, postamble, int, 5407 (preamble != 0) + fullblk + (postamble != 0)); 5408 5409 /* 5410 * Have to fix iov base/len for partial buffers. They 5411 * currently represent full arc_buf's. 5412 */ 5413 if (preamble) { 5414 /* data begins in the middle of the arc_buf */ 5415 abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl), 5416 blksz); 5417 ASSERT(abuf); 5418 (void) dmu_xuio_add(xuio, abuf, 5419 blksz - preamble, preamble); 5420 } 5421 5422 for (i = 0; i < fullblk; i++) { 5423 abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl), 5424 blksz); 5425 ASSERT(abuf); 5426 (void) dmu_xuio_add(xuio, abuf, 0, blksz); 5427 } 5428 5429 if (postamble) { 5430 /* data ends in the middle of the arc_buf */ 5431 abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl), 5432 blksz); 5433 ASSERT(abuf); 5434 (void) dmu_xuio_add(xuio, abuf, 0, postamble); 5435 } 5436 break; 5437 case UIO_READ: 5438 /* 5439 * Loan out an arc_buf for read if the read size is larger than 5440 * the current file block size. Block alignment is not 5441 * considered. Partial arc_buf will be loaned out for read. 5442 */ 5443 blksz = zp->z_blksz; 5444 if (blksz < zcr_blksz_min) 5445 blksz = zcr_blksz_min; 5446 if (blksz > zcr_blksz_max) 5447 blksz = zcr_blksz_max; 5448 /* avoid potential complexity of dealing with it */ 5449 if (blksz > max_blksz) { 5450 ZFS_EXIT(zfsvfs); 5451 return (SET_ERROR(EINVAL)); 5452 } 5453 5454 maxsize = zp->z_size - uio->uio_loffset; 5455 if (size > maxsize) 5456 size = maxsize; 5457 5458 if (size < blksz || vn_has_cached_data(vp)) { 5459 ZFS_EXIT(zfsvfs); 5460 return (SET_ERROR(EINVAL)); 5461 } 5462 break; 5463 default: 5464 ZFS_EXIT(zfsvfs); 5465 return (SET_ERROR(EINVAL)); 5466 } 5467 5468 uio->uio_extflg = UIO_XUIO; 5469 XUIO_XUZC_RW(xuio) = ioflag; 5470 ZFS_EXIT(zfsvfs); 5471 return (0); 5472} 5473 5474/*ARGSUSED*/ 5475static int 5476zfs_retzcbuf(vnode_t *vp, xuio_t *xuio, cred_t *cr, caller_context_t *ct) 5477{ 5478 int i; 5479 arc_buf_t *abuf; 5480 int ioflag = XUIO_XUZC_RW(xuio); 5481 5482 ASSERT(xuio->xu_type == UIOTYPE_ZEROCOPY); 5483 5484 i = dmu_xuio_cnt(xuio); 5485 while (i-- > 0) { 5486 abuf = dmu_xuio_arcbuf(xuio, i); 5487 /* 5488 * if abuf == NULL, it must be a write buffer 5489 * that has been returned in zfs_write(). 5490 */ 5491 if (abuf) 5492 dmu_return_arcbuf(abuf); 5493 ASSERT(abuf || ioflag == UIO_WRITE); 5494 } 5495 5496 dmu_xuio_fini(xuio); 5497 return (0); 5498} 5499 5500/* 5501 * Predeclare these here so that the compiler assumes that 5502 * this is an "old style" function declaration that does 5503 * not include arguments => we won't get type mismatch errors 5504 * in the initializations that follow. 5505 */ 5506static int zfs_inval(); 5507static int zfs_isdir(); 5508 5509static int 5510zfs_inval() 5511{ 5512 return (SET_ERROR(EINVAL)); 5513} 5514 5515static int 5516zfs_isdir() 5517{ 5518 return (SET_ERROR(EISDIR)); 5519} 5520/* 5521 * Directory vnode operations template 5522 */ 5523vnodeops_t *zfs_dvnodeops; 5524const fs_operation_def_t zfs_dvnodeops_template[] = { 5525 VOPNAME_OPEN, { .vop_open = zfs_open }, 5526 VOPNAME_CLOSE, { .vop_close = zfs_close }, 5527 VOPNAME_READ, { .error = zfs_isdir }, 5528 VOPNAME_WRITE, { .error = zfs_isdir }, 5529 VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 5530 VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 5531 VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 5532 VOPNAME_ACCESS, { .vop_access = zfs_access }, 5533 VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 5534 VOPNAME_CREATE, { .vop_create = zfs_create }, 5535 VOPNAME_REMOVE, { .vop_remove = zfs_remove }, 5536 VOPNAME_LINK, { .vop_link = zfs_link }, 5537 VOPNAME_RENAME, { .vop_rename = zfs_rename }, 5538 VOPNAME_MKDIR, { .vop_mkdir = zfs_mkdir }, 5539 VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir }, 5540 VOPNAME_READDIR, { .vop_readdir = zfs_readdir }, 5541 VOPNAME_SYMLINK, { .vop_symlink = zfs_symlink }, 5542 VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 5543 VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 5544 VOPNAME_FID, { .vop_fid = zfs_fid }, 5545 VOPNAME_SEEK, { .vop_seek = zfs_seek }, 5546 VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 5547 VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 5548 VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 5549 VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 5550 NULL, NULL 5551}; 5552 5553/* 5554 * Regular file vnode operations template 5555 */ 5556vnodeops_t *zfs_fvnodeops; 5557const fs_operation_def_t zfs_fvnodeops_template[] = { 5558 VOPNAME_OPEN, { .vop_open = zfs_open }, 5559 VOPNAME_CLOSE, { .vop_close = zfs_close }, 5560 VOPNAME_READ, { .vop_read = zfs_read }, 5561 VOPNAME_WRITE, { .vop_write = zfs_write }, 5562 VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 5563 VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 5564 VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 5565 VOPNAME_ACCESS, { .vop_access = zfs_access }, 5566 VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 5567 VOPNAME_RENAME, { .vop_rename = zfs_rename }, 5568 VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 5569 VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 5570 VOPNAME_FID, { .vop_fid = zfs_fid }, 5571 VOPNAME_SEEK, { .vop_seek = zfs_seek }, 5572 VOPNAME_FRLOCK, { .vop_frlock = zfs_frlock }, 5573 VOPNAME_SPACE, { .vop_space = zfs_space }, 5574 VOPNAME_GETPAGE, { .vop_getpage = zfs_getpage }, 5575 VOPNAME_PUTPAGE, { .vop_putpage = zfs_putpage }, 5576 VOPNAME_MAP, { .vop_map = zfs_map }, 5577 VOPNAME_ADDMAP, { .vop_addmap = zfs_addmap }, 5578 VOPNAME_DELMAP, { .vop_delmap = zfs_delmap }, 5579 VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 5580 VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 5581 VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 5582 VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 5583 VOPNAME_REQZCBUF, { .vop_reqzcbuf = zfs_reqzcbuf }, 5584 VOPNAME_RETZCBUF, { .vop_retzcbuf = zfs_retzcbuf }, 5585 NULL, NULL 5586}; 5587 5588/* 5589 * Symbolic link vnode operations template 5590 */ 5591vnodeops_t *zfs_symvnodeops; 5592const fs_operation_def_t zfs_symvnodeops_template[] = { 5593 VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 5594 VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 5595 VOPNAME_ACCESS, { .vop_access = zfs_access }, 5596 VOPNAME_RENAME, { .vop_rename = zfs_rename }, 5597 VOPNAME_READLINK, { .vop_readlink = zfs_readlink }, 5598 VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 5599 VOPNAME_FID, { .vop_fid = zfs_fid }, 5600 VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 5601 VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 5602 NULL, NULL 5603}; 5604 5605/* 5606 * special share hidden files vnode operations template 5607 */ 5608vnodeops_t *zfs_sharevnodeops; 5609const fs_operation_def_t zfs_sharevnodeops_template[] = { 5610 VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 5611 VOPNAME_ACCESS, { .vop_access = zfs_access }, 5612 VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 5613 VOPNAME_FID, { .vop_fid = zfs_fid }, 5614 VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 5615 VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 5616 VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 5617 VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 5618 NULL, NULL 5619}; 5620 5621/* 5622 * Extended attribute directory vnode operations template 5623 * 5624 * This template is identical to the directory vnodes 5625 * operation template except for restricted operations: 5626 * VOP_MKDIR() 5627 * VOP_SYMLINK() 5628 * 5629 * Note that there are other restrictions embedded in: 5630 * zfs_create() - restrict type to VREG 5631 * zfs_link() - no links into/out of attribute space 5632 * zfs_rename() - no moves into/out of attribute space 5633 */ 5634vnodeops_t *zfs_xdvnodeops; 5635const fs_operation_def_t zfs_xdvnodeops_template[] = { 5636 VOPNAME_OPEN, { .vop_open = zfs_open }, 5637 VOPNAME_CLOSE, { .vop_close = zfs_close }, 5638 VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 5639 VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 5640 VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 5641 VOPNAME_ACCESS, { .vop_access = zfs_access }, 5642 VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 5643 VOPNAME_CREATE, { .vop_create = zfs_create }, 5644 VOPNAME_REMOVE, { .vop_remove = zfs_remove }, 5645 VOPNAME_LINK, { .vop_link = zfs_link }, 5646 VOPNAME_RENAME, { .vop_rename = zfs_rename }, 5647 VOPNAME_MKDIR, { .error = zfs_inval }, 5648 VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir }, 5649 VOPNAME_READDIR, { .vop_readdir = zfs_readdir }, 5650 VOPNAME_SYMLINK, { .error = zfs_inval }, 5651 VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 5652 VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 5653 VOPNAME_FID, { .vop_fid = zfs_fid }, 5654 VOPNAME_SEEK, { .vop_seek = zfs_seek }, 5655 VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 5656 VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 5657 VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 5658 VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 5659 NULL, NULL 5660}; 5661 5662/* 5663 * Error vnode operations template 5664 */ 5665vnodeops_t *zfs_evnodeops; 5666const fs_operation_def_t zfs_evnodeops_template[] = { 5667 VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 5668 VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 5669 NULL, NULL 5670}; 5671#endif /* sun */ 5672 5673static int 5674ioflags(int ioflags) 5675{ 5676 int flags = 0; 5677 5678 if (ioflags & IO_APPEND) 5679 flags |= FAPPEND; 5680 if (ioflags & IO_NDELAY) 5681 flags |= FNONBLOCK; 5682 if (ioflags & IO_SYNC) 5683 flags |= (FSYNC | FDSYNC | FRSYNC); 5684 5685 return (flags); 5686} 5687 5688static int 5689zfs_getpages(struct vnode *vp, vm_page_t *m, int count, int reqpage) 5690{ 5691 znode_t *zp = VTOZ(vp); 5692 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 5693 objset_t *os = zp->z_zfsvfs->z_os; 5694 vm_page_t mfirst, mlast, mreq; 5695 vm_object_t object; 5696 caddr_t va; 5697 struct sf_buf *sf; 5698 off_t startoff, endoff; 5699 int i, error; 5700 vm_pindex_t reqstart, reqend; 5701 int pcount, lsize, reqsize, size; 5702 5703 ZFS_ENTER(zfsvfs); 5704 ZFS_VERIFY_ZP(zp); 5705 5706 pcount = OFF_TO_IDX(round_page(count)); 5707 mreq = m[reqpage]; 5708 object = mreq->object; 5709 error = 0; 5710 5711 KASSERT(vp->v_object == object, ("mismatching object")); 5712 5713 if (pcount > 1 && zp->z_blksz > PAGESIZE) { 5714 startoff = rounddown(IDX_TO_OFF(mreq->pindex), zp->z_blksz); 5715 reqstart = OFF_TO_IDX(round_page(startoff)); 5716 if (reqstart < m[0]->pindex) 5717 reqstart = 0; 5718 else 5719 reqstart = reqstart - m[0]->pindex; 5720 endoff = roundup(IDX_TO_OFF(mreq->pindex) + PAGE_SIZE, 5721 zp->z_blksz); 5722 reqend = OFF_TO_IDX(trunc_page(endoff)) - 1; 5723 if (reqend > m[pcount - 1]->pindex) 5724 reqend = m[pcount - 1]->pindex; 5725 reqsize = reqend - m[reqstart]->pindex + 1; 5726 KASSERT(reqstart <= reqpage && reqpage < reqstart + reqsize, 5727 ("reqpage beyond [reqstart, reqstart + reqsize[ bounds")); 5728 } else { 5729 reqstart = reqpage; 5730 reqsize = 1; 5731 } 5732 mfirst = m[reqstart]; 5733 mlast = m[reqstart + reqsize - 1]; 5734 5735 zfs_vmobject_wlock(object); 5736 5737 for (i = 0; i < reqstart; i++) { 5738 vm_page_lock(m[i]); 5739 vm_page_free(m[i]); 5740 vm_page_unlock(m[i]); 5741 } 5742 for (i = reqstart + reqsize; i < pcount; i++) { 5743 vm_page_lock(m[i]); 5744 vm_page_free(m[i]); 5745 vm_page_unlock(m[i]); 5746 } 5747 5748 if (mreq->valid && reqsize == 1) { 5749 if (mreq->valid != VM_PAGE_BITS_ALL) 5750 vm_page_zero_invalid(mreq, TRUE); 5751 zfs_vmobject_wunlock(object); 5752 ZFS_EXIT(zfsvfs); 5753 return (zfs_vm_pagerret_ok); 5754 } 5755 5756 PCPU_INC(cnt.v_vnodein); 5757 PCPU_ADD(cnt.v_vnodepgsin, reqsize); 5758 5759 if (IDX_TO_OFF(mreq->pindex) >= object->un_pager.vnp.vnp_size) { 5760 for (i = reqstart; i < reqstart + reqsize; i++) { 5761 if (i != reqpage) { 5762 vm_page_lock(m[i]); 5763 vm_page_free(m[i]); 5764 vm_page_unlock(m[i]); 5765 } 5766 } 5767 zfs_vmobject_wunlock(object); 5768 ZFS_EXIT(zfsvfs); 5769 return (zfs_vm_pagerret_bad); 5770 } 5771 5772 lsize = PAGE_SIZE; 5773 if (IDX_TO_OFF(mlast->pindex) + lsize > object->un_pager.vnp.vnp_size) 5774 lsize = object->un_pager.vnp.vnp_size - IDX_TO_OFF(mlast->pindex); 5775 5776 zfs_vmobject_wunlock(object); 5777 5778 for (i = reqstart; i < reqstart + reqsize; i++) { 5779 size = PAGE_SIZE; 5780 if (i == (reqstart + reqsize - 1)) 5781 size = lsize; 5782 va = zfs_map_page(m[i], &sf); 5783 error = dmu_read(os, zp->z_id, IDX_TO_OFF(m[i]->pindex), 5784 size, va, DMU_READ_PREFETCH); 5785 if (size != PAGE_SIZE) 5786 bzero(va + size, PAGE_SIZE - size); 5787 zfs_unmap_page(sf); 5788 if (error != 0) 5789 break; 5790 } 5791 5792 zfs_vmobject_wlock(object); 5793 5794 for (i = reqstart; i < reqstart + reqsize; i++) { 5795 if (!error) 5796 m[i]->valid = VM_PAGE_BITS_ALL; 5797 KASSERT(m[i]->dirty == 0, ("zfs_getpages: page %p is dirty", m[i])); 5798 if (i != reqpage) 5799 vm_page_readahead_finish(m[i]); 5800 } 5801 5802 zfs_vmobject_wunlock(object); 5803 5804 ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 5805 ZFS_EXIT(zfsvfs); 5806 return (error ? zfs_vm_pagerret_error : zfs_vm_pagerret_ok); 5807} 5808 5809static int 5810zfs_freebsd_getpages(ap) 5811 struct vop_getpages_args /* { 5812 struct vnode *a_vp; 5813 vm_page_t *a_m; 5814 int a_count; 5815 int a_reqpage; 5816 vm_ooffset_t a_offset; 5817 } */ *ap; 5818{ 5819 5820 return (zfs_getpages(ap->a_vp, ap->a_m, ap->a_count, ap->a_reqpage)); 5821} 5822 5823static int 5824zfs_freebsd_bmap(ap) 5825 struct vop_bmap_args /* { 5826 struct vnode *a_vp; 5827 daddr_t a_bn; 5828 struct bufobj **a_bop; 5829 daddr_t *a_bnp; 5830 int *a_runp; 5831 int *a_runb; 5832 } */ *ap; 5833{ 5834 5835 if (ap->a_bop != NULL) 5836 *ap->a_bop = &ap->a_vp->v_bufobj; 5837 if (ap->a_bnp != NULL) 5838 *ap->a_bnp = ap->a_bn; 5839 if (ap->a_runp != NULL) 5840 *ap->a_runp = 0; 5841 if (ap->a_runb != NULL) 5842 *ap->a_runb = 0; 5843 5844 return (0); 5845} 5846 5847static int 5848zfs_freebsd_open(ap) 5849 struct vop_open_args /* { 5850 struct vnode *a_vp; 5851 int a_mode; 5852 struct ucred *a_cred; 5853 struct thread *a_td; 5854 } */ *ap; 5855{ 5856 vnode_t *vp = ap->a_vp; 5857 znode_t *zp = VTOZ(vp); 5858 int error; 5859 5860 error = zfs_open(&vp, ap->a_mode, ap->a_cred, NULL); 5861 if (error == 0) 5862 vnode_create_vobject(vp, zp->z_size, ap->a_td); 5863 return (error); 5864} 5865 5866static int 5867zfs_freebsd_close(ap) 5868 struct vop_close_args /* { 5869 struct vnode *a_vp; 5870 int a_fflag; 5871 struct ucred *a_cred; 5872 struct thread *a_td; 5873 } */ *ap; 5874{ 5875 5876 return (zfs_close(ap->a_vp, ap->a_fflag, 1, 0, ap->a_cred, NULL)); 5877} 5878 5879static int 5880zfs_freebsd_ioctl(ap) 5881 struct vop_ioctl_args /* { 5882 struct vnode *a_vp; 5883 u_long a_command; 5884 caddr_t a_data; 5885 int a_fflag; 5886 struct ucred *cred; 5887 struct thread *td; 5888 } */ *ap; 5889{ 5890 5891 return (zfs_ioctl(ap->a_vp, ap->a_command, (intptr_t)ap->a_data, 5892 ap->a_fflag, ap->a_cred, NULL, NULL)); 5893} 5894 5895static int 5896zfs_freebsd_read(ap) 5897 struct vop_read_args /* { 5898 struct vnode *a_vp; 5899 struct uio *a_uio; 5900 int a_ioflag; 5901 struct ucred *a_cred; 5902 } */ *ap; 5903{ 5904 5905 return (zfs_read(ap->a_vp, ap->a_uio, ioflags(ap->a_ioflag), 5906 ap->a_cred, NULL)); 5907} 5908 5909static int 5910zfs_freebsd_write(ap) 5911 struct vop_write_args /* { 5912 struct vnode *a_vp; 5913 struct uio *a_uio; 5914 int a_ioflag; 5915 struct ucred *a_cred; 5916 } */ *ap; 5917{ 5918 5919 return (zfs_write(ap->a_vp, ap->a_uio, ioflags(ap->a_ioflag), 5920 ap->a_cred, NULL)); 5921} 5922 5923static int 5924zfs_freebsd_access(ap) 5925 struct vop_access_args /* { 5926 struct vnode *a_vp; 5927 accmode_t a_accmode; 5928 struct ucred *a_cred; 5929 struct thread *a_td; 5930 } */ *ap; 5931{ 5932 vnode_t *vp = ap->a_vp; 5933 znode_t *zp = VTOZ(vp); 5934 accmode_t accmode; 5935 int error = 0; 5936 5937 /* 5938 * ZFS itself only knowns about VREAD, VWRITE, VEXEC and VAPPEND, 5939 */ 5940 accmode = ap->a_accmode & (VREAD|VWRITE|VEXEC|VAPPEND); 5941 if (accmode != 0) 5942 error = zfs_access(ap->a_vp, accmode, 0, ap->a_cred, NULL); 5943 5944 /* 5945 * VADMIN has to be handled by vaccess(). 5946 */ 5947 if (error == 0) { 5948 accmode = ap->a_accmode & ~(VREAD|VWRITE|VEXEC|VAPPEND); 5949 if (accmode != 0) { 5950 error = vaccess(vp->v_type, zp->z_mode, zp->z_uid, 5951 zp->z_gid, accmode, ap->a_cred, NULL); 5952 } 5953 } 5954 5955 /* 5956 * For VEXEC, ensure that at least one execute bit is set for 5957 * non-directories. 5958 */ 5959 if (error == 0 && (ap->a_accmode & VEXEC) != 0 && vp->v_type != VDIR && 5960 (zp->z_mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == 0) { 5961 error = EACCES; 5962 } 5963 5964 return (error); 5965} 5966 5967static int 5968zfs_freebsd_lookup(ap) 5969 struct vop_lookup_args /* { 5970 struct vnode *a_dvp; 5971 struct vnode **a_vpp; 5972 struct componentname *a_cnp; 5973 } */ *ap; 5974{ 5975 struct componentname *cnp = ap->a_cnp; 5976 char nm[NAME_MAX + 1]; 5977 5978 ASSERT(cnp->cn_namelen < sizeof(nm)); 5979 strlcpy(nm, cnp->cn_nameptr, MIN(cnp->cn_namelen + 1, sizeof(nm))); 5980 5981 return (zfs_lookup(ap->a_dvp, nm, ap->a_vpp, cnp, cnp->cn_nameiop, 5982 cnp->cn_cred, cnp->cn_thread, 0)); 5983} 5984 5985static int 5986zfs_freebsd_create(ap) 5987 struct vop_create_args /* { 5988 struct vnode *a_dvp; 5989 struct vnode **a_vpp; 5990 struct componentname *a_cnp; 5991 struct vattr *a_vap; 5992 } */ *ap; 5993{ 5994 struct componentname *cnp = ap->a_cnp; 5995 vattr_t *vap = ap->a_vap; 5996 int mode; 5997 5998 ASSERT(cnp->cn_flags & SAVENAME); 5999 6000 vattr_init_mask(vap); 6001 mode = vap->va_mode & ALLPERMS; 6002 6003 return (zfs_create(ap->a_dvp, cnp->cn_nameptr, vap, !EXCL, mode, 6004 ap->a_vpp, cnp->cn_cred, cnp->cn_thread)); 6005} 6006 6007static int 6008zfs_freebsd_remove(ap) 6009 struct vop_remove_args /* { 6010 struct vnode *a_dvp; 6011 struct vnode *a_vp; 6012 struct componentname *a_cnp; 6013 } */ *ap; 6014{ 6015 6016 ASSERT(ap->a_cnp->cn_flags & SAVENAME); 6017 6018 return (zfs_remove(ap->a_dvp, ap->a_cnp->cn_nameptr, 6019 ap->a_cnp->cn_cred, NULL, 0)); 6020} 6021 6022static int 6023zfs_freebsd_mkdir(ap) 6024 struct vop_mkdir_args /* { 6025 struct vnode *a_dvp; 6026 struct vnode **a_vpp; 6027 struct componentname *a_cnp; 6028 struct vattr *a_vap; 6029 } */ *ap; 6030{ 6031 vattr_t *vap = ap->a_vap; 6032 6033 ASSERT(ap->a_cnp->cn_flags & SAVENAME); 6034 6035 vattr_init_mask(vap); 6036 6037 return (zfs_mkdir(ap->a_dvp, ap->a_cnp->cn_nameptr, vap, ap->a_vpp, 6038 ap->a_cnp->cn_cred, NULL, 0, NULL)); 6039} 6040 6041static int 6042zfs_freebsd_rmdir(ap) 6043 struct vop_rmdir_args /* { 6044 struct vnode *a_dvp; 6045 struct vnode *a_vp; 6046 struct componentname *a_cnp; 6047 } */ *ap; 6048{ 6049 struct componentname *cnp = ap->a_cnp; 6050 6051 ASSERT(cnp->cn_flags & SAVENAME); 6052 6053 return (zfs_rmdir(ap->a_dvp, cnp->cn_nameptr, NULL, cnp->cn_cred, NULL, 0)); 6054} 6055 6056static int 6057zfs_freebsd_readdir(ap) 6058 struct vop_readdir_args /* { 6059 struct vnode *a_vp; 6060 struct uio *a_uio; 6061 struct ucred *a_cred; 6062 int *a_eofflag; 6063 int *a_ncookies; 6064 u_long **a_cookies; 6065 } */ *ap; 6066{ 6067 6068 return (zfs_readdir(ap->a_vp, ap->a_uio, ap->a_cred, ap->a_eofflag, 6069 ap->a_ncookies, ap->a_cookies)); 6070} 6071 6072static int 6073zfs_freebsd_fsync(ap) 6074 struct vop_fsync_args /* { 6075 struct vnode *a_vp; 6076 int a_waitfor; 6077 struct thread *a_td; 6078 } */ *ap; 6079{ 6080 6081 vop_stdfsync(ap); 6082 return (zfs_fsync(ap->a_vp, 0, ap->a_td->td_ucred, NULL)); 6083} 6084 6085static int 6086zfs_freebsd_getattr(ap) 6087 struct vop_getattr_args /* { 6088 struct vnode *a_vp; 6089 struct vattr *a_vap; 6090 struct ucred *a_cred; 6091 } */ *ap; 6092{ 6093 vattr_t *vap = ap->a_vap; 6094 xvattr_t xvap; 6095 u_long fflags = 0; 6096 int error; 6097 6098 xva_init(&xvap); 6099 xvap.xva_vattr = *vap; 6100 xvap.xva_vattr.va_mask |= AT_XVATTR; 6101 6102 /* Convert chflags into ZFS-type flags. */ 6103 /* XXX: what about SF_SETTABLE?. */ 6104 XVA_SET_REQ(&xvap, XAT_IMMUTABLE); 6105 XVA_SET_REQ(&xvap, XAT_APPENDONLY); 6106 XVA_SET_REQ(&xvap, XAT_NOUNLINK); 6107 XVA_SET_REQ(&xvap, XAT_NODUMP); 6108 XVA_SET_REQ(&xvap, XAT_READONLY); 6109 XVA_SET_REQ(&xvap, XAT_ARCHIVE); 6110 XVA_SET_REQ(&xvap, XAT_SYSTEM); 6111 XVA_SET_REQ(&xvap, XAT_HIDDEN); 6112 XVA_SET_REQ(&xvap, XAT_REPARSE); 6113 XVA_SET_REQ(&xvap, XAT_OFFLINE); 6114 XVA_SET_REQ(&xvap, XAT_SPARSE); 6115 6116 error = zfs_getattr(ap->a_vp, (vattr_t *)&xvap, 0, ap->a_cred, NULL); 6117 if (error != 0) 6118 return (error); 6119 6120 /* Convert ZFS xattr into chflags. */ 6121#define FLAG_CHECK(fflag, xflag, xfield) do { \ 6122 if (XVA_ISSET_RTN(&xvap, (xflag)) && (xfield) != 0) \ 6123 fflags |= (fflag); \ 6124} while (0) 6125 FLAG_CHECK(SF_IMMUTABLE, XAT_IMMUTABLE, 6126 xvap.xva_xoptattrs.xoa_immutable); 6127 FLAG_CHECK(SF_APPEND, XAT_APPENDONLY, 6128 xvap.xva_xoptattrs.xoa_appendonly); 6129 FLAG_CHECK(SF_NOUNLINK, XAT_NOUNLINK, 6130 xvap.xva_xoptattrs.xoa_nounlink); 6131 FLAG_CHECK(UF_ARCHIVE, XAT_ARCHIVE, 6132 xvap.xva_xoptattrs.xoa_archive); 6133 FLAG_CHECK(UF_NODUMP, XAT_NODUMP, 6134 xvap.xva_xoptattrs.xoa_nodump); 6135 FLAG_CHECK(UF_READONLY, XAT_READONLY, 6136 xvap.xva_xoptattrs.xoa_readonly); 6137 FLAG_CHECK(UF_SYSTEM, XAT_SYSTEM, 6138 xvap.xva_xoptattrs.xoa_system); 6139 FLAG_CHECK(UF_HIDDEN, XAT_HIDDEN, 6140 xvap.xva_xoptattrs.xoa_hidden); 6141 FLAG_CHECK(UF_REPARSE, XAT_REPARSE, 6142 xvap.xva_xoptattrs.xoa_reparse); 6143 FLAG_CHECK(UF_OFFLINE, XAT_OFFLINE, 6144 xvap.xva_xoptattrs.xoa_offline); 6145 FLAG_CHECK(UF_SPARSE, XAT_SPARSE, 6146 xvap.xva_xoptattrs.xoa_sparse); 6147 6148#undef FLAG_CHECK 6149 *vap = xvap.xva_vattr; 6150 vap->va_flags = fflags; 6151 return (0); 6152} 6153 6154static int 6155zfs_freebsd_setattr(ap) 6156 struct vop_setattr_args /* { 6157 struct vnode *a_vp; 6158 struct vattr *a_vap; 6159 struct ucred *a_cred; 6160 } */ *ap; 6161{ 6162 vnode_t *vp = ap->a_vp; 6163 vattr_t *vap = ap->a_vap; 6164 cred_t *cred = ap->a_cred; 6165 xvattr_t xvap; 6166 u_long fflags; 6167 uint64_t zflags; 6168 6169 vattr_init_mask(vap); 6170 vap->va_mask &= ~AT_NOSET; 6171 6172 xva_init(&xvap); 6173 xvap.xva_vattr = *vap; 6174 6175 zflags = VTOZ(vp)->z_pflags; 6176 6177 if (vap->va_flags != VNOVAL) { 6178 zfsvfs_t *zfsvfs = VTOZ(vp)->z_zfsvfs; 6179 int error; 6180 6181 if (zfsvfs->z_use_fuids == B_FALSE) 6182 return (EOPNOTSUPP); 6183 6184 fflags = vap->va_flags; 6185 /* 6186 * XXX KDM 6187 * We need to figure out whether it makes sense to allow 6188 * UF_REPARSE through, since we don't really have other 6189 * facilities to handle reparse points and zfs_setattr() 6190 * doesn't currently allow setting that attribute anyway. 6191 */ 6192 if ((fflags & ~(SF_IMMUTABLE|SF_APPEND|SF_NOUNLINK|UF_ARCHIVE| 6193 UF_NODUMP|UF_SYSTEM|UF_HIDDEN|UF_READONLY|UF_REPARSE| 6194 UF_OFFLINE|UF_SPARSE)) != 0) 6195 return (EOPNOTSUPP); 6196 /* 6197 * Unprivileged processes are not permitted to unset system 6198 * flags, or modify flags if any system flags are set. 6199 * Privileged non-jail processes may not modify system flags 6200 * if securelevel > 0 and any existing system flags are set. 6201 * Privileged jail processes behave like privileged non-jail 6202 * processes if the security.jail.chflags_allowed sysctl is 6203 * is non-zero; otherwise, they behave like unprivileged 6204 * processes. 6205 */ 6206 if (secpolicy_fs_owner(vp->v_mount, cred) == 0 || 6207 priv_check_cred(cred, PRIV_VFS_SYSFLAGS, 0) == 0) { 6208 if (zflags & 6209 (ZFS_IMMUTABLE | ZFS_APPENDONLY | ZFS_NOUNLINK)) { 6210 error = securelevel_gt(cred, 0); 6211 if (error != 0) 6212 return (error); 6213 } 6214 } else { 6215 /* 6216 * Callers may only modify the file flags on objects they 6217 * have VADMIN rights for. 6218 */ 6219 if ((error = VOP_ACCESS(vp, VADMIN, cred, curthread)) != 0) 6220 return (error); 6221 if (zflags & 6222 (ZFS_IMMUTABLE | ZFS_APPENDONLY | ZFS_NOUNLINK)) { 6223 return (EPERM); 6224 } 6225 if (fflags & 6226 (SF_IMMUTABLE | SF_APPEND | SF_NOUNLINK)) { 6227 return (EPERM); 6228 } 6229 } 6230 6231#define FLAG_CHANGE(fflag, zflag, xflag, xfield) do { \ 6232 if (((fflags & (fflag)) && !(zflags & (zflag))) || \ 6233 ((zflags & (zflag)) && !(fflags & (fflag)))) { \ 6234 XVA_SET_REQ(&xvap, (xflag)); \ 6235 (xfield) = ((fflags & (fflag)) != 0); \ 6236 } \ 6237} while (0) 6238 /* Convert chflags into ZFS-type flags. */ 6239 /* XXX: what about SF_SETTABLE?. */ 6240 FLAG_CHANGE(SF_IMMUTABLE, ZFS_IMMUTABLE, XAT_IMMUTABLE, 6241 xvap.xva_xoptattrs.xoa_immutable); 6242 FLAG_CHANGE(SF_APPEND, ZFS_APPENDONLY, XAT_APPENDONLY, 6243 xvap.xva_xoptattrs.xoa_appendonly); 6244 FLAG_CHANGE(SF_NOUNLINK, ZFS_NOUNLINK, XAT_NOUNLINK, 6245 xvap.xva_xoptattrs.xoa_nounlink); 6246 FLAG_CHANGE(UF_ARCHIVE, ZFS_ARCHIVE, XAT_ARCHIVE, 6247 xvap.xva_xoptattrs.xoa_archive); 6248 FLAG_CHANGE(UF_NODUMP, ZFS_NODUMP, XAT_NODUMP, 6249 xvap.xva_xoptattrs.xoa_nodump); 6250 FLAG_CHANGE(UF_READONLY, ZFS_READONLY, XAT_READONLY, 6251 xvap.xva_xoptattrs.xoa_readonly); 6252 FLAG_CHANGE(UF_SYSTEM, ZFS_SYSTEM, XAT_SYSTEM, 6253 xvap.xva_xoptattrs.xoa_system); 6254 FLAG_CHANGE(UF_HIDDEN, ZFS_HIDDEN, XAT_HIDDEN, 6255 xvap.xva_xoptattrs.xoa_hidden); 6256 FLAG_CHANGE(UF_REPARSE, ZFS_REPARSE, XAT_REPARSE, 6257 xvap.xva_xoptattrs.xoa_hidden); 6258 FLAG_CHANGE(UF_OFFLINE, ZFS_OFFLINE, XAT_OFFLINE, 6259 xvap.xva_xoptattrs.xoa_offline); 6260 FLAG_CHANGE(UF_SPARSE, ZFS_SPARSE, XAT_SPARSE, 6261 xvap.xva_xoptattrs.xoa_sparse); 6262#undef FLAG_CHANGE 6263 } 6264 return (zfs_setattr(vp, (vattr_t *)&xvap, 0, cred, NULL)); 6265} 6266 6267static int 6268zfs_freebsd_rename(ap) 6269 struct vop_rename_args /* { 6270 struct vnode *a_fdvp; 6271 struct vnode *a_fvp; 6272 struct componentname *a_fcnp; 6273 struct vnode *a_tdvp; 6274 struct vnode *a_tvp; 6275 struct componentname *a_tcnp; 6276 } */ *ap; 6277{ 6278 vnode_t *fdvp = ap->a_fdvp; 6279 vnode_t *fvp = ap->a_fvp; 6280 vnode_t *tdvp = ap->a_tdvp; 6281 vnode_t *tvp = ap->a_tvp; 6282 int error; 6283 6284 ASSERT(ap->a_fcnp->cn_flags & (SAVENAME|SAVESTART)); 6285 ASSERT(ap->a_tcnp->cn_flags & (SAVENAME|SAVESTART)); 6286 6287 /* 6288 * Check for cross-device rename. 6289 */ 6290 if ((fdvp->v_mount != tdvp->v_mount) || 6291 (tvp && (fdvp->v_mount != tvp->v_mount))) 6292 error = EXDEV; 6293 else 6294 error = zfs_rename(fdvp, ap->a_fcnp->cn_nameptr, tdvp, 6295 ap->a_tcnp->cn_nameptr, ap->a_fcnp->cn_cred, NULL, 0); 6296 if (tdvp == tvp) 6297 VN_RELE(tdvp); 6298 else 6299 VN_URELE(tdvp); 6300 if (tvp) 6301 VN_URELE(tvp); 6302 VN_RELE(fdvp); 6303 VN_RELE(fvp); 6304 6305 return (error); 6306} 6307 6308static int 6309zfs_freebsd_symlink(ap) 6310 struct vop_symlink_args /* { 6311 struct vnode *a_dvp; 6312 struct vnode **a_vpp; 6313 struct componentname *a_cnp; 6314 struct vattr *a_vap; 6315 char *a_target; 6316 } */ *ap; 6317{ 6318 struct componentname *cnp = ap->a_cnp; 6319 vattr_t *vap = ap->a_vap; 6320 6321 ASSERT(cnp->cn_flags & SAVENAME); 6322 6323 vap->va_type = VLNK; /* FreeBSD: Syscall only sets va_mode. */ 6324 vattr_init_mask(vap); 6325 6326 return (zfs_symlink(ap->a_dvp, ap->a_vpp, cnp->cn_nameptr, vap, 6327 ap->a_target, cnp->cn_cred, cnp->cn_thread)); 6328} 6329 6330static int 6331zfs_freebsd_readlink(ap) 6332 struct vop_readlink_args /* { 6333 struct vnode *a_vp; 6334 struct uio *a_uio; 6335 struct ucred *a_cred; 6336 } */ *ap; 6337{ 6338 6339 return (zfs_readlink(ap->a_vp, ap->a_uio, ap->a_cred, NULL)); 6340} 6341 6342static int 6343zfs_freebsd_link(ap) 6344 struct vop_link_args /* { 6345 struct vnode *a_tdvp; 6346 struct vnode *a_vp; 6347 struct componentname *a_cnp; 6348 } */ *ap; 6349{ 6350 struct componentname *cnp = ap->a_cnp; 6351 vnode_t *vp = ap->a_vp; 6352 vnode_t *tdvp = ap->a_tdvp; 6353 6354 if (tdvp->v_mount != vp->v_mount) 6355 return (EXDEV); 6356 6357 ASSERT(cnp->cn_flags & SAVENAME); 6358 6359 return (zfs_link(tdvp, vp, cnp->cn_nameptr, cnp->cn_cred, NULL, 0)); 6360} 6361 6362static int 6363zfs_freebsd_inactive(ap) 6364 struct vop_inactive_args /* { 6365 struct vnode *a_vp; 6366 struct thread *a_td; 6367 } */ *ap; 6368{ 6369 vnode_t *vp = ap->a_vp; 6370 6371 zfs_inactive(vp, ap->a_td->td_ucred, NULL); 6372 return (0); 6373} 6374 6375static int 6376zfs_freebsd_reclaim(ap) 6377 struct vop_reclaim_args /* { 6378 struct vnode *a_vp; 6379 struct thread *a_td; 6380 } */ *ap; 6381{ 6382 vnode_t *vp = ap->a_vp; 6383 znode_t *zp = VTOZ(vp); 6384 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 6385 6386 ASSERT(zp != NULL); 6387 6388 /* Destroy the vm object and flush associated pages. */ 6389 vnode_destroy_vobject(vp); 6390 6391 /* 6392 * z_teardown_inactive_lock protects from a race with 6393 * zfs_znode_dmu_fini in zfsvfs_teardown during 6394 * force unmount. 6395 */ 6396 rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_READER); 6397 if (zp->z_sa_hdl == NULL) 6398 zfs_znode_free(zp); 6399 else 6400 zfs_zinactive(zp); 6401 rw_exit(&zfsvfs->z_teardown_inactive_lock); 6402 6403 vp->v_data = NULL; 6404 return (0); 6405} 6406 6407static int 6408zfs_freebsd_fid(ap) 6409 struct vop_fid_args /* { 6410 struct vnode *a_vp; 6411 struct fid *a_fid; 6412 } */ *ap; 6413{ 6414 6415 return (zfs_fid(ap->a_vp, (void *)ap->a_fid, NULL)); 6416} 6417 6418static int 6419zfs_freebsd_pathconf(ap) 6420 struct vop_pathconf_args /* { 6421 struct vnode *a_vp; 6422 int a_name; 6423 register_t *a_retval; 6424 } */ *ap; 6425{ 6426 ulong_t val; 6427 int error; 6428 6429 error = zfs_pathconf(ap->a_vp, ap->a_name, &val, curthread->td_ucred, NULL); 6430 if (error == 0) 6431 *ap->a_retval = val; 6432 else if (error == EOPNOTSUPP) 6433 error = vop_stdpathconf(ap); 6434 return (error); 6435} 6436 6437static int 6438zfs_freebsd_fifo_pathconf(ap) 6439 struct vop_pathconf_args /* { 6440 struct vnode *a_vp; 6441 int a_name; 6442 register_t *a_retval; 6443 } */ *ap; 6444{ 6445 6446 switch (ap->a_name) { 6447 case _PC_ACL_EXTENDED: 6448 case _PC_ACL_NFS4: 6449 case _PC_ACL_PATH_MAX: 6450 case _PC_MAC_PRESENT: 6451 return (zfs_freebsd_pathconf(ap)); 6452 default: 6453 return (fifo_specops.vop_pathconf(ap)); 6454 } 6455} 6456 6457/* 6458 * FreeBSD's extended attributes namespace defines file name prefix for ZFS' 6459 * extended attribute name: 6460 * 6461 * NAMESPACE PREFIX 6462 * system freebsd:system: 6463 * user (none, can be used to access ZFS fsattr(5) attributes 6464 * created on Solaris) 6465 */ 6466static int 6467zfs_create_attrname(int attrnamespace, const char *name, char *attrname, 6468 size_t size) 6469{ 6470 const char *namespace, *prefix, *suffix; 6471 6472 /* We don't allow '/' character in attribute name. */ 6473 if (strchr(name, '/') != NULL) 6474 return (EINVAL); 6475 /* We don't allow attribute names that start with "freebsd:" string. */ 6476 if (strncmp(name, "freebsd:", 8) == 0) 6477 return (EINVAL); 6478 6479 bzero(attrname, size); 6480 6481 switch (attrnamespace) { 6482 case EXTATTR_NAMESPACE_USER: 6483#if 0 6484 prefix = "freebsd:"; 6485 namespace = EXTATTR_NAMESPACE_USER_STRING; 6486 suffix = ":"; 6487#else 6488 /* 6489 * This is the default namespace by which we can access all 6490 * attributes created on Solaris. 6491 */ 6492 prefix = namespace = suffix = ""; 6493#endif 6494 break; 6495 case EXTATTR_NAMESPACE_SYSTEM: 6496 prefix = "freebsd:"; 6497 namespace = EXTATTR_NAMESPACE_SYSTEM_STRING; 6498 suffix = ":"; 6499 break; 6500 case EXTATTR_NAMESPACE_EMPTY: 6501 default: 6502 return (EINVAL); 6503 } 6504 if (snprintf(attrname, size, "%s%s%s%s", prefix, namespace, suffix, 6505 name) >= size) { 6506 return (ENAMETOOLONG); 6507 } 6508 return (0); 6509} 6510 6511/* 6512 * Vnode operating to retrieve a named extended attribute. 6513 */ 6514static int 6515zfs_getextattr(struct vop_getextattr_args *ap) 6516/* 6517vop_getextattr { 6518 IN struct vnode *a_vp; 6519 IN int a_attrnamespace; 6520 IN const char *a_name; 6521 INOUT struct uio *a_uio; 6522 OUT size_t *a_size; 6523 IN struct ucred *a_cred; 6524 IN struct thread *a_td; 6525}; 6526*/ 6527{ 6528 zfsvfs_t *zfsvfs = VTOZ(ap->a_vp)->z_zfsvfs; 6529 struct thread *td = ap->a_td; 6530 struct nameidata nd; 6531 char attrname[255]; 6532 struct vattr va; 6533 vnode_t *xvp = NULL, *vp; 6534 int error, flags; 6535 6536 error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace, 6537 ap->a_cred, ap->a_td, VREAD); 6538 if (error != 0) 6539 return (error); 6540 6541 error = zfs_create_attrname(ap->a_attrnamespace, ap->a_name, attrname, 6542 sizeof(attrname)); 6543 if (error != 0) 6544 return (error); 6545 6546 ZFS_ENTER(zfsvfs); 6547 6548 error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td, 6549 LOOKUP_XATTR); 6550 if (error != 0) { 6551 ZFS_EXIT(zfsvfs); 6552 return (error); 6553 } 6554 6555 flags = FREAD; 6556 NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, attrname, 6557 xvp, td); 6558 error = vn_open_cred(&nd, &flags, 0, 0, ap->a_cred, NULL); 6559 vp = nd.ni_vp; 6560 NDFREE(&nd, NDF_ONLY_PNBUF); 6561 if (error != 0) { 6562 ZFS_EXIT(zfsvfs); 6563 if (error == ENOENT) 6564 error = ENOATTR; 6565 return (error); 6566 } 6567 6568 if (ap->a_size != NULL) { 6569 error = VOP_GETATTR(vp, &va, ap->a_cred); 6570 if (error == 0) 6571 *ap->a_size = (size_t)va.va_size; 6572 } else if (ap->a_uio != NULL) 6573 error = VOP_READ(vp, ap->a_uio, IO_UNIT, ap->a_cred); 6574 6575 VOP_UNLOCK(vp, 0); 6576 vn_close(vp, flags, ap->a_cred, td); 6577 ZFS_EXIT(zfsvfs); 6578 6579 return (error); 6580} 6581 6582/* 6583 * Vnode operation to remove a named attribute. 6584 */ 6585int 6586zfs_deleteextattr(struct vop_deleteextattr_args *ap) 6587/* 6588vop_deleteextattr { 6589 IN struct vnode *a_vp; 6590 IN int a_attrnamespace; 6591 IN const char *a_name; 6592 IN struct ucred *a_cred; 6593 IN struct thread *a_td; 6594}; 6595*/ 6596{ 6597 zfsvfs_t *zfsvfs = VTOZ(ap->a_vp)->z_zfsvfs; 6598 struct thread *td = ap->a_td; 6599 struct nameidata nd; 6600 char attrname[255]; 6601 struct vattr va; 6602 vnode_t *xvp = NULL, *vp; 6603 int error, flags; 6604 6605 error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace, 6606 ap->a_cred, ap->a_td, VWRITE); 6607 if (error != 0) 6608 return (error); 6609 6610 error = zfs_create_attrname(ap->a_attrnamespace, ap->a_name, attrname, 6611 sizeof(attrname)); 6612 if (error != 0) 6613 return (error); 6614 6615 ZFS_ENTER(zfsvfs); 6616 6617 error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td, 6618 LOOKUP_XATTR); 6619 if (error != 0) { 6620 ZFS_EXIT(zfsvfs); 6621 return (error); 6622 } 6623 6624 NDINIT_ATVP(&nd, DELETE, NOFOLLOW | LOCKPARENT | LOCKLEAF, 6625 UIO_SYSSPACE, attrname, xvp, td); 6626 error = namei(&nd); 6627 vp = nd.ni_vp; 6628 NDFREE(&nd, NDF_ONLY_PNBUF); 6629 if (error != 0) { 6630 ZFS_EXIT(zfsvfs); 6631 if (error == ENOENT) 6632 error = ENOATTR; 6633 return (error); 6634 } 6635 error = VOP_REMOVE(nd.ni_dvp, vp, &nd.ni_cnd); 6636 6637 vput(nd.ni_dvp); 6638 if (vp == nd.ni_dvp) 6639 vrele(vp); 6640 else 6641 vput(vp); 6642 ZFS_EXIT(zfsvfs); 6643 6644 return (error); 6645} 6646 6647/* 6648 * Vnode operation to set a named attribute. 6649 */ 6650static int 6651zfs_setextattr(struct vop_setextattr_args *ap) 6652/* 6653vop_setextattr { 6654 IN struct vnode *a_vp; 6655 IN int a_attrnamespace; 6656 IN const char *a_name; 6657 INOUT struct uio *a_uio; 6658 IN struct ucred *a_cred; 6659 IN struct thread *a_td; 6660}; 6661*/ 6662{ 6663 zfsvfs_t *zfsvfs = VTOZ(ap->a_vp)->z_zfsvfs; 6664 struct thread *td = ap->a_td; 6665 struct nameidata nd; 6666 char attrname[255]; 6667 struct vattr va; 6668 vnode_t *xvp = NULL, *vp; 6669 int error, flags; 6670 6671 error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace, 6672 ap->a_cred, ap->a_td, VWRITE); 6673 if (error != 0) 6674 return (error); 6675 6676 error = zfs_create_attrname(ap->a_attrnamespace, ap->a_name, attrname, 6677 sizeof(attrname)); 6678 if (error != 0) 6679 return (error); 6680 6681 ZFS_ENTER(zfsvfs); 6682 6683 error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td, 6684 LOOKUP_XATTR | CREATE_XATTR_DIR); 6685 if (error != 0) { 6686 ZFS_EXIT(zfsvfs); 6687 return (error); 6688 } 6689 6690 flags = FFLAGS(O_WRONLY | O_CREAT); 6691 NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, attrname, 6692 xvp, td); 6693 error = vn_open_cred(&nd, &flags, 0600, 0, ap->a_cred, NULL); 6694 vp = nd.ni_vp; 6695 NDFREE(&nd, NDF_ONLY_PNBUF); 6696 if (error != 0) { 6697 ZFS_EXIT(zfsvfs); 6698 return (error); 6699 } 6700 6701 VATTR_NULL(&va); 6702 va.va_size = 0; 6703 error = VOP_SETATTR(vp, &va, ap->a_cred); 6704 if (error == 0) 6705 VOP_WRITE(vp, ap->a_uio, IO_UNIT | IO_SYNC, ap->a_cred); 6706 6707 VOP_UNLOCK(vp, 0); 6708 vn_close(vp, flags, ap->a_cred, td); 6709 ZFS_EXIT(zfsvfs); 6710 6711 return (error); 6712} 6713 6714/* 6715 * Vnode operation to retrieve extended attributes on a vnode. 6716 */ 6717static int 6718zfs_listextattr(struct vop_listextattr_args *ap) 6719/* 6720vop_listextattr { 6721 IN struct vnode *a_vp; 6722 IN int a_attrnamespace; 6723 INOUT struct uio *a_uio; 6724 OUT size_t *a_size; 6725 IN struct ucred *a_cred; 6726 IN struct thread *a_td; 6727}; 6728*/ 6729{ 6730 zfsvfs_t *zfsvfs = VTOZ(ap->a_vp)->z_zfsvfs; 6731 struct thread *td = ap->a_td; 6732 struct nameidata nd; 6733 char attrprefix[16]; 6734 u_char dirbuf[sizeof(struct dirent)]; 6735 struct dirent *dp; 6736 struct iovec aiov; 6737 struct uio auio, *uio = ap->a_uio; 6738 size_t *sizep = ap->a_size; 6739 size_t plen; 6740 vnode_t *xvp = NULL, *vp; 6741 int done, error, eof, pos; 6742 6743 error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace, 6744 ap->a_cred, ap->a_td, VREAD); 6745 if (error != 0) 6746 return (error); 6747 6748 error = zfs_create_attrname(ap->a_attrnamespace, "", attrprefix, 6749 sizeof(attrprefix)); 6750 if (error != 0) 6751 return (error); 6752 plen = strlen(attrprefix); 6753 6754 ZFS_ENTER(zfsvfs); 6755 6756 if (sizep != NULL) 6757 *sizep = 0; 6758 6759 error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td, 6760 LOOKUP_XATTR); 6761 if (error != 0) { 6762 ZFS_EXIT(zfsvfs); 6763 /* 6764 * ENOATTR means that the EA directory does not yet exist, 6765 * i.e. there are no extended attributes there. 6766 */ 6767 if (error == ENOATTR) 6768 error = 0; 6769 return (error); 6770 } 6771 6772 NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | LOCKSHARED, 6773 UIO_SYSSPACE, ".", xvp, td); 6774 error = namei(&nd); 6775 vp = nd.ni_vp; 6776 NDFREE(&nd, NDF_ONLY_PNBUF); 6777 if (error != 0) { 6778 ZFS_EXIT(zfsvfs); 6779 return (error); 6780 } 6781 6782 auio.uio_iov = &aiov; 6783 auio.uio_iovcnt = 1; 6784 auio.uio_segflg = UIO_SYSSPACE; 6785 auio.uio_td = td; 6786 auio.uio_rw = UIO_READ; 6787 auio.uio_offset = 0; 6788 6789 do { 6790 u_char nlen; 6791 6792 aiov.iov_base = (void *)dirbuf; 6793 aiov.iov_len = sizeof(dirbuf); 6794 auio.uio_resid = sizeof(dirbuf); 6795 error = VOP_READDIR(vp, &auio, ap->a_cred, &eof, NULL, NULL); 6796 done = sizeof(dirbuf) - auio.uio_resid; 6797 if (error != 0) 6798 break; 6799 for (pos = 0; pos < done;) { 6800 dp = (struct dirent *)(dirbuf + pos); 6801 pos += dp->d_reclen; 6802 /* 6803 * XXX: Temporarily we also accept DT_UNKNOWN, as this 6804 * is what we get when attribute was created on Solaris. 6805 */ 6806 if (dp->d_type != DT_REG && dp->d_type != DT_UNKNOWN) 6807 continue; 6808 if (plen == 0 && strncmp(dp->d_name, "freebsd:", 8) == 0) 6809 continue; 6810 else if (strncmp(dp->d_name, attrprefix, plen) != 0) 6811 continue; 6812 nlen = dp->d_namlen - plen; 6813 if (sizep != NULL) 6814 *sizep += 1 + nlen; 6815 else if (uio != NULL) { 6816 /* 6817 * Format of extattr name entry is one byte for 6818 * length and the rest for name. 6819 */ 6820 error = uiomove(&nlen, 1, uio->uio_rw, uio); 6821 if (error == 0) { 6822 error = uiomove(dp->d_name + plen, nlen, 6823 uio->uio_rw, uio); 6824 } 6825 if (error != 0) 6826 break; 6827 } 6828 } 6829 } while (!eof && error == 0); 6830 6831 vput(vp); 6832 ZFS_EXIT(zfsvfs); 6833 6834 return (error); 6835} 6836 6837int 6838zfs_freebsd_getacl(ap) 6839 struct vop_getacl_args /* { 6840 struct vnode *vp; 6841 acl_type_t type; 6842 struct acl *aclp; 6843 struct ucred *cred; 6844 struct thread *td; 6845 } */ *ap; 6846{ 6847 int error; 6848 vsecattr_t vsecattr; 6849 6850 if (ap->a_type != ACL_TYPE_NFS4) 6851 return (EINVAL); 6852 6853 vsecattr.vsa_mask = VSA_ACE | VSA_ACECNT; 6854 if (error = zfs_getsecattr(ap->a_vp, &vsecattr, 0, ap->a_cred, NULL)) 6855 return (error); 6856 6857 error = acl_from_aces(ap->a_aclp, vsecattr.vsa_aclentp, vsecattr.vsa_aclcnt); 6858 if (vsecattr.vsa_aclentp != NULL) 6859 kmem_free(vsecattr.vsa_aclentp, vsecattr.vsa_aclentsz); 6860 6861 return (error); 6862} 6863 6864int 6865zfs_freebsd_setacl(ap) 6866 struct vop_setacl_args /* { 6867 struct vnode *vp; 6868 acl_type_t type; 6869 struct acl *aclp; 6870 struct ucred *cred; 6871 struct thread *td; 6872 } */ *ap; 6873{ 6874 int error; 6875 vsecattr_t vsecattr; 6876 int aclbsize; /* size of acl list in bytes */ 6877 aclent_t *aaclp; 6878 6879 if (ap->a_type != ACL_TYPE_NFS4) 6880 return (EINVAL); 6881 6882 if (ap->a_aclp->acl_cnt < 1 || ap->a_aclp->acl_cnt > MAX_ACL_ENTRIES) 6883 return (EINVAL); 6884 6885 /* 6886 * With NFSv4 ACLs, chmod(2) may need to add additional entries, 6887 * splitting every entry into two and appending "canonical six" 6888 * entries at the end. Don't allow for setting an ACL that would 6889 * cause chmod(2) to run out of ACL entries. 6890 */ 6891 if (ap->a_aclp->acl_cnt * 2 + 6 > ACL_MAX_ENTRIES) 6892 return (ENOSPC); 6893 6894 error = acl_nfs4_check(ap->a_aclp, ap->a_vp->v_type == VDIR); 6895 if (error != 0) 6896 return (error); 6897 6898 vsecattr.vsa_mask = VSA_ACE; 6899 aclbsize = ap->a_aclp->acl_cnt * sizeof(ace_t); 6900 vsecattr.vsa_aclentp = kmem_alloc(aclbsize, KM_SLEEP); 6901 aaclp = vsecattr.vsa_aclentp; 6902 vsecattr.vsa_aclentsz = aclbsize; 6903 6904 aces_from_acl(vsecattr.vsa_aclentp, &vsecattr.vsa_aclcnt, ap->a_aclp); 6905 error = zfs_setsecattr(ap->a_vp, &vsecattr, 0, ap->a_cred, NULL); 6906 kmem_free(aaclp, aclbsize); 6907 6908 return (error); 6909} 6910 6911int 6912zfs_freebsd_aclcheck(ap) 6913 struct vop_aclcheck_args /* { 6914 struct vnode *vp; 6915 acl_type_t type; 6916 struct acl *aclp; 6917 struct ucred *cred; 6918 struct thread *td; 6919 } */ *ap; 6920{ 6921 6922 return (EOPNOTSUPP); 6923} 6924 6925struct vop_vector zfs_vnodeops; 6926struct vop_vector zfs_fifoops; 6927struct vop_vector zfs_shareops; 6928 6929struct vop_vector zfs_vnodeops = { 6930 .vop_default = &default_vnodeops, 6931 .vop_inactive = zfs_freebsd_inactive, 6932 .vop_reclaim = zfs_freebsd_reclaim, 6933 .vop_access = zfs_freebsd_access, 6934#ifdef FREEBSD_NAMECACHE 6935 .vop_lookup = vfs_cache_lookup, 6936 .vop_cachedlookup = zfs_freebsd_lookup, 6937#else 6938 .vop_lookup = zfs_freebsd_lookup, 6939#endif 6940 .vop_getattr = zfs_freebsd_getattr, 6941 .vop_setattr = zfs_freebsd_setattr, 6942 .vop_create = zfs_freebsd_create, 6943 .vop_mknod = zfs_freebsd_create, 6944 .vop_mkdir = zfs_freebsd_mkdir, 6945 .vop_readdir = zfs_freebsd_readdir, 6946 .vop_fsync = zfs_freebsd_fsync, 6947 .vop_open = zfs_freebsd_open, 6948 .vop_close = zfs_freebsd_close, 6949 .vop_rmdir = zfs_freebsd_rmdir, 6950 .vop_ioctl = zfs_freebsd_ioctl, 6951 .vop_link = zfs_freebsd_link, 6952 .vop_symlink = zfs_freebsd_symlink, 6953 .vop_readlink = zfs_freebsd_readlink, 6954 .vop_read = zfs_freebsd_read, 6955 .vop_write = zfs_freebsd_write, 6956 .vop_remove = zfs_freebsd_remove, 6957 .vop_rename = zfs_freebsd_rename, 6958 .vop_pathconf = zfs_freebsd_pathconf, 6959 .vop_bmap = zfs_freebsd_bmap, 6960 .vop_fid = zfs_freebsd_fid, 6961 .vop_getextattr = zfs_getextattr, 6962 .vop_deleteextattr = zfs_deleteextattr, 6963 .vop_setextattr = zfs_setextattr, 6964 .vop_listextattr = zfs_listextattr, 6965 .vop_getacl = zfs_freebsd_getacl, 6966 .vop_setacl = zfs_freebsd_setacl, 6967 .vop_aclcheck = zfs_freebsd_aclcheck, 6968 .vop_getpages = zfs_freebsd_getpages, 6969}; 6970 6971struct vop_vector zfs_fifoops = { 6972 .vop_default = &fifo_specops, 6973 .vop_fsync = zfs_freebsd_fsync, 6974 .vop_access = zfs_freebsd_access, 6975 .vop_getattr = zfs_freebsd_getattr, 6976 .vop_inactive = zfs_freebsd_inactive, 6977 .vop_read = VOP_PANIC, 6978 .vop_reclaim = zfs_freebsd_reclaim, 6979 .vop_setattr = zfs_freebsd_setattr, 6980 .vop_write = VOP_PANIC, 6981 .vop_pathconf = zfs_freebsd_fifo_pathconf, 6982 .vop_fid = zfs_freebsd_fid, 6983 .vop_getacl = zfs_freebsd_getacl, 6984 .vop_setacl = zfs_freebsd_setacl, 6985 .vop_aclcheck = zfs_freebsd_aclcheck, 6986}; 6987 6988/* 6989 * special share hidden files vnode operations template 6990 */ 6991struct vop_vector zfs_shareops = { 6992 .vop_default = &default_vnodeops, 6993 .vop_access = zfs_freebsd_access, 6994 .vop_inactive = zfs_freebsd_inactive, 6995 .vop_reclaim = zfs_freebsd_reclaim, 6996 .vop_fid = zfs_freebsd_fid, 6997 .vop_pathconf = zfs_freebsd_pathconf, 6998}; 6999