zfs_vnops.c revision 260776
1250395Sattilio/* 2250395Sattilio * CDDL HEADER START 3250395Sattilio * 4250395Sattilio * The contents of this file are subject to the terms of the 5250395Sattilio * Common Development and Distribution License (the "License"). 6250395Sattilio * You may not use this file except in compliance with the License. 7250395Sattilio * 8250395Sattilio * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9250395Sattilio * or http://www.opensolaris.org/os/licensing. 10250395Sattilio * See the License for the specific language governing permissions 11250395Sattilio * and limitations under the License. 12250395Sattilio * 13250395Sattilio * When distributing Covered Code, include this CDDL HEADER in each 14250395Sattilio * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15250395Sattilio * If applicable, add the following below this CDDL HEADER, with the 16250395Sattilio * fields enclosed by brackets "[]" replaced with your own identifying 17250395Sattilio * information: Portions Copyright [yyyy] [name of copyright owner] 18250395Sattilio * 19250395Sattilio * CDDL HEADER END 20250395Sattilio */ 21250395Sattilio/* 22250395Sattilio * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23250395Sattilio * Copyright (c) 2013 by Delphix. All rights reserved. 24250395Sattilio * Copyright 2013 Nexenta Systems, Inc. All rights reserved. 25250395Sattilio */ 26250395Sattilio 27250395Sattilio/* Portions Copyright 2007 Jeremy Teo */ 28250395Sattilio/* Portions Copyright 2010 Robert Milkowski */ 29250395Sattilio 30250395Sattilio#include <sys/types.h> 31250395Sattilio#include <sys/param.h> 32250395Sattilio#include <sys/time.h> 33250395Sattilio#include <sys/systm.h> 34250395Sattilio#include <sys/sysmacros.h> 35250395Sattilio#include <sys/resource.h> 36250395Sattilio#include <sys/vfs.h> 37250395Sattilio#include <sys/vm.h> 38250395Sattilio#include <sys/vnode.h> 39299122Sjhb#include <sys/file.h> 40250395Sattilio#include <sys/stat.h> 41299122Sjhb#include <sys/kmem.h> 42250395Sattilio#include <sys/taskq.h> 43299122Sjhb#include <sys/uio.h> 44250395Sattilio#include <sys/atomic.h> 45250395Sattilio#include <sys/namei.h> 46250395Sattilio#include <sys/mman.h> 47250395Sattilio#include <sys/cmn_err.h> 48289867Smarkj#include <sys/errno.h> 49250395Sattilio#include <sys/unistd.h> 50299184Sroyger#include <sys/zfs_dir.h> 51299184Sroyger#include <sys/zfs_ioctl.h> 52299184Sroyger#include <sys/fs/zfs.h> 53299184Sroyger#include <sys/dmu.h> 54299184Sroyger#include <sys/dmu_objset.h> 55299184Sroyger#include <sys/spa.h> 56299184Sroyger#include <sys/txg.h> 57299184Sroyger#include <sys/dbuf.h> 58250395Sattilio#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) If ZPL locks are held, pass TXG_NOWAIT as the second argument to 111 * dmu_tx_assign(). This is critical because we don't want to block 112 * while holding locks. 113 * 114 * If no ZPL locks are held (aside from ZFS_ENTER()), use TXG_WAIT. This 115 * reduces lock contention and CPU usage when we must wait (note that if 116 * throughput is constrained by the storage, nearly every transaction 117 * must wait). 118 * 119 * Note, in particular, that if a lock is sometimes acquired before 120 * the tx assigns, and sometimes after (e.g. z_lock), then failing 121 * to use a non-blocking assign can deadlock the system. The scenario: 122 * 123 * Thread A has grabbed a lock before calling dmu_tx_assign(). 124 * Thread B is in an already-assigned tx, and blocks for this lock. 125 * Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open() 126 * forever, because the previous txg can't quiesce until B's tx commits. 127 * 128 * If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT, 129 * then drop all locks, call dmu_tx_wait(), and try again. On subsequent 130 * calls to dmu_tx_assign(), pass TXG_WAITED rather than TXG_NOWAIT, 131 * to indicate that this operation has already called dmu_tx_wait(). 132 * This will ensure that we don't retry forever, waiting a short bit 133 * each time. 134 * 135 * (5) If the operation succeeded, generate the intent log entry for it 136 * before dropping locks. This ensures that the ordering of events 137 * in the intent log matches the order in which they actually occurred. 138 * During ZIL replay the zfs_log_* functions will update the sequence 139 * number to indicate the zil transaction has replayed. 140 * 141 * (6) At the end of each vnode op, the DMU tx must always commit, 142 * regardless of whether there were any errors. 143 * 144 * (7) After dropping all locks, invoke zil_commit(zilog, foid) 145 * to ensure that synchronous semantics are provided when necessary. 146 * 147 * In general, this is how things should be ordered in each vnode op: 148 * 149 * ZFS_ENTER(zfsvfs); // exit if unmounted 150 * top: 151 * zfs_dirent_lock(&dl, ...) // lock directory entry (may VN_HOLD()) 152 * rw_enter(...); // grab any other locks you need 153 * tx = dmu_tx_create(...); // get DMU tx 154 * dmu_tx_hold_*(); // hold each object you might modify 155 * error = dmu_tx_assign(tx, waited ? TXG_WAITED : TXG_NOWAIT); 156 * if (error) { 157 * rw_exit(...); // drop locks 158 * zfs_dirent_unlock(dl); // unlock directory entry 159 * VN_RELE(...); // release held vnodes 160 * if (error == ERESTART) { 161 * waited = B_TRUE; 162 * dmu_tx_wait(tx); 163 * dmu_tx_abort(tx); 164 * goto top; 165 * } 166 * dmu_tx_abort(tx); // abort DMU tx 167 * ZFS_EXIT(zfsvfs); // finished in zfs 168 * return (error); // really out of space 169 * } 170 * error = do_real_work(); // do whatever this VOP does 171 * if (error == 0) 172 * zfs_log_*(...); // on success, make ZIL entry 173 * dmu_tx_commit(tx); // commit DMU tx -- error or not 174 * rw_exit(...); // drop locks 175 * zfs_dirent_unlock(dl); // unlock directory entry 176 * VN_RELE(...); // release held vnodes 177 * zil_commit(zilog, foid); // synchronous when necessary 178 * ZFS_EXIT(zfsvfs); // finished in zfs 179 * return (error); // done, report error 180 */ 181 182/* ARGSUSED */ 183static int 184zfs_open(vnode_t **vpp, int flag, cred_t *cr, caller_context_t *ct) 185{ 186 znode_t *zp = VTOZ(*vpp); 187 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 188 189 ZFS_ENTER(zfsvfs); 190 ZFS_VERIFY_ZP(zp); 191 192 if ((flag & FWRITE) && (zp->z_pflags & ZFS_APPENDONLY) && 193 ((flag & FAPPEND) == 0)) { 194 ZFS_EXIT(zfsvfs); 195 return (SET_ERROR(EPERM)); 196 } 197 198 if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan && 199 ZTOV(zp)->v_type == VREG && 200 !(zp->z_pflags & ZFS_AV_QUARANTINED) && zp->z_size > 0) { 201 if (fs_vscan(*vpp, cr, 0) != 0) { 202 ZFS_EXIT(zfsvfs); 203 return (SET_ERROR(EACCES)); 204 } 205 } 206 207 /* Keep a count of the synchronous opens in the znode */ 208 if (flag & (FSYNC | FDSYNC)) 209 atomic_inc_32(&zp->z_sync_cnt); 210 211 ZFS_EXIT(zfsvfs); 212 return (0); 213} 214 215/* ARGSUSED */ 216static int 217zfs_close(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr, 218 caller_context_t *ct) 219{ 220 znode_t *zp = VTOZ(vp); 221 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 222 223 /* 224 * Clean up any locks held by this process on the vp. 225 */ 226 cleanlocks(vp, ddi_get_pid(), 0); 227 cleanshares(vp, ddi_get_pid()); 228 229 ZFS_ENTER(zfsvfs); 230 ZFS_VERIFY_ZP(zp); 231 232 /* Decrement the synchronous opens in the znode */ 233 if ((flag & (FSYNC | FDSYNC)) && (count == 1)) 234 atomic_dec_32(&zp->z_sync_cnt); 235 236 if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan && 237 ZTOV(zp)->v_type == VREG && 238 !(zp->z_pflags & ZFS_AV_QUARANTINED) && zp->z_size > 0) 239 VERIFY(fs_vscan(vp, cr, 1) == 0); 240 241 ZFS_EXIT(zfsvfs); 242 return (0); 243} 244 245/* 246 * Lseek support for finding holes (cmd == _FIO_SEEK_HOLE) and 247 * data (cmd == _FIO_SEEK_DATA). "off" is an in/out parameter. 248 */ 249static int 250zfs_holey(vnode_t *vp, u_long cmd, offset_t *off) 251{ 252 znode_t *zp = VTOZ(vp); 253 uint64_t noff = (uint64_t)*off; /* new offset */ 254 uint64_t file_sz; 255 int error; 256 boolean_t hole; 257 258 file_sz = zp->z_size; 259 if (noff >= file_sz) { 260 return (SET_ERROR(ENXIO)); 261 } 262 263 if (cmd == _FIO_SEEK_HOLE) 264 hole = B_TRUE; 265 else 266 hole = B_FALSE; 267 268 error = dmu_offset_next(zp->z_zfsvfs->z_os, zp->z_id, hole, &noff); 269 270 /* end of file? */ 271 if ((error == ESRCH) || (noff > file_sz)) { 272 /* 273 * Handle the virtual hole at the end of file. 274 */ 275 if (hole) { 276 *off = file_sz; 277 return (0); 278 } 279 return (SET_ERROR(ENXIO)); 280 } 281 282 if (noff < *off) 283 return (error); 284 *off = noff; 285 return (error); 286} 287 288/* ARGSUSED */ 289static int 290zfs_ioctl(vnode_t *vp, u_long com, intptr_t data, int flag, cred_t *cred, 291 int *rvalp, caller_context_t *ct) 292{ 293 offset_t off; 294 int error; 295 zfsvfs_t *zfsvfs; 296 znode_t *zp; 297 298 switch (com) { 299 case _FIOFFS: 300 return (0); 301 302 /* 303 * The following two ioctls are used by bfu. Faking out, 304 * necessary to avoid bfu errors. 305 */ 306 case _FIOGDIO: 307 case _FIOSDIO: 308 return (0); 309 310 case _FIO_SEEK_DATA: 311 case _FIO_SEEK_HOLE: 312#ifdef sun 313 if (ddi_copyin((void *)data, &off, sizeof (off), flag)) 314 return (SET_ERROR(EFAULT)); 315#else 316 off = *(offset_t *)data; 317#endif 318 zp = VTOZ(vp); 319 zfsvfs = zp->z_zfsvfs; 320 ZFS_ENTER(zfsvfs); 321 ZFS_VERIFY_ZP(zp); 322 323 /* offset parameter is in/out */ 324 error = zfs_holey(vp, com, &off); 325 ZFS_EXIT(zfsvfs); 326 if (error) 327 return (error); 328#ifdef sun 329 if (ddi_copyout(&off, (void *)data, sizeof (off), flag)) 330 return (SET_ERROR(EFAULT)); 331#else 332 *(offset_t *)data = off; 333#endif 334 return (0); 335 } 336 return (SET_ERROR(ENOTTY)); 337} 338 339static vm_page_t 340page_busy(vnode_t *vp, int64_t start, int64_t off, int64_t nbytes) 341{ 342 vm_object_t obj; 343 vm_page_t pp; 344 int64_t end; 345 346 /* 347 * At present vm_page_clear_dirty extends the cleared range to DEV_BSIZE 348 * aligned boundaries, if the range is not aligned. As a result a 349 * DEV_BSIZE subrange with partially dirty data may get marked as clean. 350 * It may happen that all DEV_BSIZE subranges are marked clean and thus 351 * the whole page would be considred clean despite have some dirty data. 352 * For this reason we should shrink the range to DEV_BSIZE aligned 353 * boundaries before calling vm_page_clear_dirty. 354 */ 355 end = rounddown2(off + nbytes, DEV_BSIZE); 356 off = roundup2(off, DEV_BSIZE); 357 nbytes = end - off; 358 359 obj = vp->v_object; 360 zfs_vmobject_assert_wlocked(obj); 361 362 for (;;) { 363 if ((pp = vm_page_lookup(obj, OFF_TO_IDX(start))) != NULL && 364 pp->valid) { 365 if (vm_page_xbusied(pp)) { 366 /* 367 * Reference the page before unlocking and 368 * sleeping so that the page daemon is less 369 * likely to reclaim it. 370 */ 371 vm_page_reference(pp); 372 vm_page_lock(pp); 373 zfs_vmobject_wunlock(obj); 374 vm_page_busy_sleep(pp, "zfsmwb"); 375 zfs_vmobject_wlock(obj); 376 continue; 377 } 378 vm_page_sbusy(pp); 379 } else if (pp == NULL) { 380 pp = vm_page_alloc(obj, OFF_TO_IDX(start), 381 VM_ALLOC_SYSTEM | VM_ALLOC_IFCACHED | 382 VM_ALLOC_SBUSY); 383 } else { 384 ASSERT(pp != NULL && !pp->valid); 385 pp = NULL; 386 } 387 388 if (pp != NULL) { 389 ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL); 390 vm_object_pip_add(obj, 1); 391 pmap_remove_write(pp); 392 if (nbytes != 0) 393 vm_page_clear_dirty(pp, off, nbytes); 394 } 395 break; 396 } 397 return (pp); 398} 399 400static void 401page_unbusy(vm_page_t pp) 402{ 403 404 vm_page_sunbusy(pp); 405 vm_object_pip_subtract(pp->object, 1); 406} 407 408static vm_page_t 409page_hold(vnode_t *vp, int64_t start) 410{ 411 vm_object_t obj; 412 vm_page_t pp; 413 414 obj = vp->v_object; 415 zfs_vmobject_assert_wlocked(obj); 416 417 for (;;) { 418 if ((pp = vm_page_lookup(obj, OFF_TO_IDX(start))) != NULL && 419 pp->valid) { 420 if (vm_page_xbusied(pp)) { 421 /* 422 * Reference the page before unlocking and 423 * sleeping so that the page daemon is less 424 * likely to reclaim it. 425 */ 426 vm_page_reference(pp); 427 vm_page_lock(pp); 428 zfs_vmobject_wunlock(obj); 429 vm_page_busy_sleep(pp, "zfsmwb"); 430 zfs_vmobject_wlock(obj); 431 continue; 432 } 433 434 ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL); 435 vm_page_lock(pp); 436 vm_page_hold(pp); 437 vm_page_unlock(pp); 438 439 } else 440 pp = NULL; 441 break; 442 } 443 return (pp); 444} 445 446static void 447page_unhold(vm_page_t pp) 448{ 449 450 vm_page_lock(pp); 451 vm_page_unhold(pp); 452 vm_page_unlock(pp); 453} 454 455static caddr_t 456zfs_map_page(vm_page_t pp, struct sf_buf **sfp) 457{ 458 459 *sfp = sf_buf_alloc(pp, 0); 460 return ((caddr_t)sf_buf_kva(*sfp)); 461} 462 463static void 464zfs_unmap_page(struct sf_buf *sf) 465{ 466 467 sf_buf_free(sf); 468} 469 470/* 471 * When a file is memory mapped, we must keep the IO data synchronized 472 * between the DMU cache and the memory mapped pages. What this means: 473 * 474 * On Write: If we find a memory mapped page, we write to *both* 475 * the page and the dmu buffer. 476 */ 477static void 478update_pages(vnode_t *vp, int64_t start, int len, objset_t *os, uint64_t oid, 479 int segflg, dmu_tx_t *tx) 480{ 481 vm_object_t obj; 482 struct sf_buf *sf; 483 caddr_t va; 484 int off; 485 486 ASSERT(vp->v_mount != NULL); 487 obj = vp->v_object; 488 ASSERT(obj != NULL); 489 490 off = start & PAGEOFFSET; 491 zfs_vmobject_wlock(obj); 492 for (start &= PAGEMASK; len > 0; start += PAGESIZE) { 493 vm_page_t pp; 494 int nbytes = imin(PAGESIZE - off, len); 495 496 if (segflg == UIO_NOCOPY) { 497 pp = vm_page_lookup(obj, OFF_TO_IDX(start)); 498 KASSERT(pp != NULL, 499 ("zfs update_pages: NULL page in putpages case")); 500 KASSERT(off == 0, 501 ("zfs update_pages: unaligned data in putpages case")); 502 KASSERT(pp->valid == VM_PAGE_BITS_ALL, 503 ("zfs update_pages: invalid page in putpages case")); 504 KASSERT(vm_page_sbusied(pp), 505 ("zfs update_pages: unbusy page in putpages case")); 506 KASSERT(!pmap_page_is_write_mapped(pp), 507 ("zfs update_pages: writable page in putpages case")); 508 zfs_vmobject_wunlock(obj); 509 510 va = zfs_map_page(pp, &sf); 511 (void) dmu_write(os, oid, start, nbytes, va, tx); 512 zfs_unmap_page(sf); 513 514 zfs_vmobject_wlock(obj); 515 vm_page_undirty(pp); 516 } else if ((pp = page_busy(vp, start, off, nbytes)) != NULL) { 517 zfs_vmobject_wunlock(obj); 518 519 va = zfs_map_page(pp, &sf); 520 (void) dmu_read(os, oid, start+off, nbytes, 521 va+off, DMU_READ_PREFETCH);; 522 zfs_unmap_page(sf); 523 524 zfs_vmobject_wlock(obj); 525 page_unbusy(pp); 526 } 527 len -= nbytes; 528 off = 0; 529 } 530 if (segflg != UIO_NOCOPY) 531 vm_object_pip_wakeupn(obj, 0); 532 zfs_vmobject_wunlock(obj); 533} 534 535/* 536 * Read with UIO_NOCOPY flag means that sendfile(2) requests 537 * ZFS to populate a range of page cache pages with data. 538 * 539 * NOTE: this function could be optimized to pre-allocate 540 * all pages in advance, drain exclusive busy on all of them, 541 * map them into contiguous KVA region and populate them 542 * in one single dmu_read() call. 543 */ 544static int 545mappedread_sf(vnode_t *vp, int nbytes, uio_t *uio) 546{ 547 znode_t *zp = VTOZ(vp); 548 objset_t *os = zp->z_zfsvfs->z_os; 549 struct sf_buf *sf; 550 vm_object_t obj; 551 vm_page_t pp; 552 int64_t start; 553 caddr_t va; 554 int len = nbytes; 555 int off; 556 int error = 0; 557 558 ASSERT(uio->uio_segflg == UIO_NOCOPY); 559 ASSERT(vp->v_mount != NULL); 560 obj = vp->v_object; 561 ASSERT(obj != NULL); 562 ASSERT((uio->uio_loffset & PAGEOFFSET) == 0); 563 564 zfs_vmobject_wlock(obj); 565 for (start = uio->uio_loffset; len > 0; start += PAGESIZE) { 566 int bytes = MIN(PAGESIZE, len); 567 568 pp = vm_page_grab(obj, OFF_TO_IDX(start), VM_ALLOC_SBUSY | 569 VM_ALLOC_NORMAL | VM_ALLOC_IGN_SBUSY); 570 if (pp->valid == 0) { 571 zfs_vmobject_wunlock(obj); 572 va = zfs_map_page(pp, &sf); 573 error = dmu_read(os, zp->z_id, start, bytes, va, 574 DMU_READ_PREFETCH); 575 if (bytes != PAGESIZE && error == 0) 576 bzero(va + bytes, PAGESIZE - bytes); 577 zfs_unmap_page(sf); 578 zfs_vmobject_wlock(obj); 579 vm_page_sunbusy(pp); 580 vm_page_lock(pp); 581 if (error) { 582 if (pp->wire_count == 0 && pp->valid == 0 && 583 !vm_page_busied(pp)) 584 vm_page_free(pp); 585 } else { 586 pp->valid = VM_PAGE_BITS_ALL; 587 vm_page_activate(pp); 588 } 589 vm_page_unlock(pp); 590 } else { 591 ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL); 592 vm_page_sunbusy(pp); 593 } 594 if (error) 595 break; 596 uio->uio_resid -= bytes; 597 uio->uio_offset += bytes; 598 len -= bytes; 599 } 600 zfs_vmobject_wunlock(obj); 601 return (error); 602} 603 604/* 605 * When a file is memory mapped, we must keep the IO data synchronized 606 * between the DMU cache and the memory mapped pages. What this means: 607 * 608 * On Read: We "read" preferentially from memory mapped pages, 609 * else we default from the dmu buffer. 610 * 611 * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when 612 * the file is memory mapped. 613 */ 614static int 615mappedread(vnode_t *vp, int nbytes, uio_t *uio) 616{ 617 znode_t *zp = VTOZ(vp); 618 objset_t *os = zp->z_zfsvfs->z_os; 619 vm_object_t obj; 620 int64_t start; 621 caddr_t va; 622 int len = nbytes; 623 int off; 624 int error = 0; 625 626 ASSERT(vp->v_mount != NULL); 627 obj = vp->v_object; 628 ASSERT(obj != NULL); 629 630 start = uio->uio_loffset; 631 off = start & PAGEOFFSET; 632 zfs_vmobject_wlock(obj); 633 for (start &= PAGEMASK; len > 0; start += PAGESIZE) { 634 vm_page_t pp; 635 uint64_t bytes = MIN(PAGESIZE - off, len); 636 637 if (pp = page_hold(vp, start)) { 638 struct sf_buf *sf; 639 caddr_t va; 640 641 zfs_vmobject_wunlock(obj); 642 va = zfs_map_page(pp, &sf); 643 error = uiomove(va + off, bytes, UIO_READ, uio); 644 zfs_unmap_page(sf); 645 zfs_vmobject_wlock(obj); 646 page_unhold(pp); 647 } else { 648 zfs_vmobject_wunlock(obj); 649 error = dmu_read_uio(os, zp->z_id, uio, bytes); 650 zfs_vmobject_wlock(obj); 651 } 652 len -= bytes; 653 off = 0; 654 if (error) 655 break; 656 } 657 zfs_vmobject_wunlock(obj); 658 return (error); 659} 660 661offset_t zfs_read_chunk_size = 1024 * 1024; /* Tunable */ 662 663/* 664 * Read bytes from specified file into supplied buffer. 665 * 666 * IN: vp - vnode of file to be read from. 667 * uio - structure supplying read location, range info, 668 * and return buffer. 669 * ioflag - SYNC flags; used to provide FRSYNC semantics. 670 * cr - credentials of caller. 671 * ct - caller context 672 * 673 * OUT: uio - updated offset and range, buffer filled. 674 * 675 * RETURN: 0 on success, error code on failure. 676 * 677 * Side Effects: 678 * vp - atime updated if byte count > 0 679 */ 680/* ARGSUSED */ 681static int 682zfs_read(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 683{ 684 znode_t *zp = VTOZ(vp); 685 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 686 objset_t *os; 687 ssize_t n, nbytes; 688 int error = 0; 689 rl_t *rl; 690 xuio_t *xuio = NULL; 691 692 ZFS_ENTER(zfsvfs); 693 ZFS_VERIFY_ZP(zp); 694 os = zfsvfs->z_os; 695 696 if (zp->z_pflags & ZFS_AV_QUARANTINED) { 697 ZFS_EXIT(zfsvfs); 698 return (SET_ERROR(EACCES)); 699 } 700 701 /* 702 * Validate file offset 703 */ 704 if (uio->uio_loffset < (offset_t)0) { 705 ZFS_EXIT(zfsvfs); 706 return (SET_ERROR(EINVAL)); 707 } 708 709 /* 710 * Fasttrack empty reads 711 */ 712 if (uio->uio_resid == 0) { 713 ZFS_EXIT(zfsvfs); 714 return (0); 715 } 716 717 /* 718 * Check for mandatory locks 719 */ 720 if (MANDMODE(zp->z_mode)) { 721 if (error = chklock(vp, FREAD, 722 uio->uio_loffset, uio->uio_resid, uio->uio_fmode, ct)) { 723 ZFS_EXIT(zfsvfs); 724 return (error); 725 } 726 } 727 728 /* 729 * If we're in FRSYNC mode, sync out this znode before reading it. 730 */ 731 if (zfsvfs->z_log && 732 (ioflag & FRSYNC || zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)) 733 zil_commit(zfsvfs->z_log, zp->z_id); 734 735 /* 736 * Lock the range against changes. 737 */ 738 rl = zfs_range_lock(zp, uio->uio_loffset, uio->uio_resid, RL_READER); 739 740 /* 741 * If we are reading past end-of-file we can skip 742 * to the end; but we might still need to set atime. 743 */ 744 if (uio->uio_loffset >= zp->z_size) { 745 error = 0; 746 goto out; 747 } 748 749 ASSERT(uio->uio_loffset < zp->z_size); 750 n = MIN(uio->uio_resid, zp->z_size - uio->uio_loffset); 751 752#ifdef sun 753 if ((uio->uio_extflg == UIO_XUIO) && 754 (((xuio_t *)uio)->xu_type == UIOTYPE_ZEROCOPY)) { 755 int nblk; 756 int blksz = zp->z_blksz; 757 uint64_t offset = uio->uio_loffset; 758 759 xuio = (xuio_t *)uio; 760 if ((ISP2(blksz))) { 761 nblk = (P2ROUNDUP(offset + n, blksz) - P2ALIGN(offset, 762 blksz)) / blksz; 763 } else { 764 ASSERT(offset + n <= blksz); 765 nblk = 1; 766 } 767 (void) dmu_xuio_init(xuio, nblk); 768 769 if (vn_has_cached_data(vp)) { 770 /* 771 * For simplicity, we always allocate a full buffer 772 * even if we only expect to read a portion of a block. 773 */ 774 while (--nblk >= 0) { 775 (void) dmu_xuio_add(xuio, 776 dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl), 777 blksz), 0, blksz); 778 } 779 } 780 } 781#endif /* sun */ 782 783 while (n > 0) { 784 nbytes = MIN(n, zfs_read_chunk_size - 785 P2PHASE(uio->uio_loffset, zfs_read_chunk_size)); 786 787#ifdef __FreeBSD__ 788 if (uio->uio_segflg == UIO_NOCOPY) 789 error = mappedread_sf(vp, nbytes, uio); 790 else 791#endif /* __FreeBSD__ */ 792 if (vn_has_cached_data(vp)) 793 error = mappedread(vp, nbytes, uio); 794 else 795 error = dmu_read_uio(os, zp->z_id, uio, nbytes); 796 if (error) { 797 /* convert checksum errors into IO errors */ 798 if (error == ECKSUM) 799 error = SET_ERROR(EIO); 800 break; 801 } 802 803 n -= nbytes; 804 } 805out: 806 zfs_range_unlock(rl); 807 808 ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 809 ZFS_EXIT(zfsvfs); 810 return (error); 811} 812 813/* 814 * Write the bytes to a file. 815 * 816 * IN: vp - vnode of file to be written to. 817 * uio - structure supplying write location, range info, 818 * and data buffer. 819 * ioflag - FAPPEND, FSYNC, and/or FDSYNC. FAPPEND is 820 * set if in append mode. 821 * cr - credentials of caller. 822 * ct - caller context (NFS/CIFS fem monitor only) 823 * 824 * OUT: uio - updated offset and range. 825 * 826 * RETURN: 0 on success, error code on failure. 827 * 828 * Timestamps: 829 * vp - ctime|mtime updated if byte count > 0 830 */ 831 832/* ARGSUSED */ 833static int 834zfs_write(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 835{ 836 znode_t *zp = VTOZ(vp); 837 rlim64_t limit = MAXOFFSET_T; 838 ssize_t start_resid = uio->uio_resid; 839 ssize_t tx_bytes; 840 uint64_t end_size; 841 dmu_tx_t *tx; 842 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 843 zilog_t *zilog; 844 offset_t woff; 845 ssize_t n, nbytes; 846 rl_t *rl; 847 int max_blksz = zfsvfs->z_max_blksz; 848 int error = 0; 849 arc_buf_t *abuf; 850 iovec_t *aiov = NULL; 851 xuio_t *xuio = NULL; 852 int i_iov = 0; 853 int iovcnt = uio->uio_iovcnt; 854 iovec_t *iovp = uio->uio_iov; 855 int write_eof; 856 int count = 0; 857 sa_bulk_attr_t bulk[4]; 858 uint64_t mtime[2], ctime[2]; 859 860 /* 861 * Fasttrack empty write 862 */ 863 n = start_resid; 864 if (n == 0) 865 return (0); 866 867 if (limit == RLIM64_INFINITY || limit > MAXOFFSET_T) 868 limit = MAXOFFSET_T; 869 870 ZFS_ENTER(zfsvfs); 871 ZFS_VERIFY_ZP(zp); 872 873 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16); 874 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16); 875 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs), NULL, 876 &zp->z_size, 8); 877 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL, 878 &zp->z_pflags, 8); 879 880 /* 881 * If immutable or not appending then return EPERM 882 */ 883 if ((zp->z_pflags & (ZFS_IMMUTABLE | ZFS_READONLY)) || 884 ((zp->z_pflags & ZFS_APPENDONLY) && !(ioflag & FAPPEND) && 885 (uio->uio_loffset < zp->z_size))) { 886 ZFS_EXIT(zfsvfs); 887 return (SET_ERROR(EPERM)); 888 } 889 890 zilog = zfsvfs->z_log; 891 892 /* 893 * Validate file offset 894 */ 895 woff = ioflag & FAPPEND ? zp->z_size : uio->uio_loffset; 896 if (woff < 0) { 897 ZFS_EXIT(zfsvfs); 898 return (SET_ERROR(EINVAL)); 899 } 900 901 /* 902 * Check for mandatory locks before calling zfs_range_lock() 903 * in order to prevent a deadlock with locks set via fcntl(). 904 */ 905 if (MANDMODE((mode_t)zp->z_mode) && 906 (error = chklock(vp, FWRITE, woff, n, uio->uio_fmode, ct)) != 0) { 907 ZFS_EXIT(zfsvfs); 908 return (error); 909 } 910 911#ifdef sun 912 /* 913 * Pre-fault the pages to ensure slow (eg NFS) pages 914 * don't hold up txg. 915 * Skip this if uio contains loaned arc_buf. 916 */ 917 if ((uio->uio_extflg == UIO_XUIO) && 918 (((xuio_t *)uio)->xu_type == UIOTYPE_ZEROCOPY)) 919 xuio = (xuio_t *)uio; 920 else 921 uio_prefaultpages(MIN(n, max_blksz), uio); 922#endif /* sun */ 923 924 /* 925 * If in append mode, set the io offset pointer to eof. 926 */ 927 if (ioflag & FAPPEND) { 928 /* 929 * Obtain an appending range lock to guarantee file append 930 * semantics. We reset the write offset once we have the lock. 931 */ 932 rl = zfs_range_lock(zp, 0, n, RL_APPEND); 933 woff = rl->r_off; 934 if (rl->r_len == UINT64_MAX) { 935 /* 936 * We overlocked the file because this write will cause 937 * the file block size to increase. 938 * Note that zp_size cannot change with this lock held. 939 */ 940 woff = zp->z_size; 941 } 942 uio->uio_loffset = woff; 943 } else { 944 /* 945 * Note that if the file block size will change as a result of 946 * this write, then this range lock will lock the entire file 947 * so that we can re-write the block safely. 948 */ 949 rl = zfs_range_lock(zp, woff, n, RL_WRITER); 950 } 951 952 if (vn_rlimit_fsize(vp, uio, uio->uio_td)) { 953 zfs_range_unlock(rl); 954 ZFS_EXIT(zfsvfs); 955 return (EFBIG); 956 } 957 958 if (woff >= limit) { 959 zfs_range_unlock(rl); 960 ZFS_EXIT(zfsvfs); 961 return (SET_ERROR(EFBIG)); 962 } 963 964 if ((woff + n) > limit || woff > (limit - n)) 965 n = limit - woff; 966 967 /* Will this write extend the file length? */ 968 write_eof = (woff + n > zp->z_size); 969 970 end_size = MAX(zp->z_size, woff + n); 971 972 /* 973 * Write the file in reasonable size chunks. Each chunk is written 974 * in a separate transaction; this keeps the intent log records small 975 * and allows us to do more fine-grained space accounting. 976 */ 977 while (n > 0) { 978 abuf = NULL; 979 woff = uio->uio_loffset; 980 if (zfs_owner_overquota(zfsvfs, zp, B_FALSE) || 981 zfs_owner_overquota(zfsvfs, zp, B_TRUE)) { 982 if (abuf != NULL) 983 dmu_return_arcbuf(abuf); 984 error = SET_ERROR(EDQUOT); 985 break; 986 } 987 988 if (xuio && abuf == NULL) { 989 ASSERT(i_iov < iovcnt); 990 aiov = &iovp[i_iov]; 991 abuf = dmu_xuio_arcbuf(xuio, i_iov); 992 dmu_xuio_clear(xuio, i_iov); 993 DTRACE_PROBE3(zfs_cp_write, int, i_iov, 994 iovec_t *, aiov, arc_buf_t *, abuf); 995 ASSERT((aiov->iov_base == abuf->b_data) || 996 ((char *)aiov->iov_base - (char *)abuf->b_data + 997 aiov->iov_len == arc_buf_size(abuf))); 998 i_iov++; 999 } else if (abuf == NULL && n >= max_blksz && 1000 woff >= zp->z_size && 1001 P2PHASE(woff, max_blksz) == 0 && 1002 zp->z_blksz == max_blksz) { 1003 /* 1004 * This write covers a full block. "Borrow" a buffer 1005 * from the dmu so that we can fill it before we enter 1006 * a transaction. This avoids the possibility of 1007 * holding up the transaction if the data copy hangs 1008 * up on a pagefault (e.g., from an NFS server mapping). 1009 */ 1010 size_t cbytes; 1011 1012 abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl), 1013 max_blksz); 1014 ASSERT(abuf != NULL); 1015 ASSERT(arc_buf_size(abuf) == max_blksz); 1016 if (error = uiocopy(abuf->b_data, max_blksz, 1017 UIO_WRITE, uio, &cbytes)) { 1018 dmu_return_arcbuf(abuf); 1019 break; 1020 } 1021 ASSERT(cbytes == max_blksz); 1022 } 1023 1024 /* 1025 * Start a transaction. 1026 */ 1027 tx = dmu_tx_create(zfsvfs->z_os); 1028 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); 1029 dmu_tx_hold_write(tx, zp->z_id, woff, MIN(n, max_blksz)); 1030 zfs_sa_upgrade_txholds(tx, zp); 1031 error = dmu_tx_assign(tx, TXG_WAIT); 1032 if (error) { 1033 dmu_tx_abort(tx); 1034 if (abuf != NULL) 1035 dmu_return_arcbuf(abuf); 1036 break; 1037 } 1038 1039 /* 1040 * If zfs_range_lock() over-locked we grow the blocksize 1041 * and then reduce the lock range. This will only happen 1042 * on the first iteration since zfs_range_reduce() will 1043 * shrink down r_len to the appropriate size. 1044 */ 1045 if (rl->r_len == UINT64_MAX) { 1046 uint64_t new_blksz; 1047 1048 if (zp->z_blksz > max_blksz) { 1049 ASSERT(!ISP2(zp->z_blksz)); 1050 new_blksz = MIN(end_size, SPA_MAXBLOCKSIZE); 1051 } else { 1052 new_blksz = MIN(end_size, max_blksz); 1053 } 1054 zfs_grow_blocksize(zp, new_blksz, tx); 1055 zfs_range_reduce(rl, woff, n); 1056 } 1057 1058 /* 1059 * XXX - should we really limit each write to z_max_blksz? 1060 * Perhaps we should use SPA_MAXBLOCKSIZE chunks? 1061 */ 1062 nbytes = MIN(n, max_blksz - P2PHASE(woff, max_blksz)); 1063 1064 if (woff + nbytes > zp->z_size) 1065 vnode_pager_setsize(vp, woff + nbytes); 1066 1067 if (abuf == NULL) { 1068 tx_bytes = uio->uio_resid; 1069 error = dmu_write_uio_dbuf(sa_get_db(zp->z_sa_hdl), 1070 uio, nbytes, tx); 1071 tx_bytes -= uio->uio_resid; 1072 } else { 1073 tx_bytes = nbytes; 1074 ASSERT(xuio == NULL || tx_bytes == aiov->iov_len); 1075 /* 1076 * If this is not a full block write, but we are 1077 * extending the file past EOF and this data starts 1078 * block-aligned, use assign_arcbuf(). Otherwise, 1079 * write via dmu_write(). 1080 */ 1081 if (tx_bytes < max_blksz && (!write_eof || 1082 aiov->iov_base != abuf->b_data)) { 1083 ASSERT(xuio); 1084 dmu_write(zfsvfs->z_os, zp->z_id, woff, 1085 aiov->iov_len, aiov->iov_base, tx); 1086 dmu_return_arcbuf(abuf); 1087 xuio_stat_wbuf_copied(); 1088 } else { 1089 ASSERT(xuio || tx_bytes == max_blksz); 1090 dmu_assign_arcbuf(sa_get_db(zp->z_sa_hdl), 1091 woff, abuf, tx); 1092 } 1093 ASSERT(tx_bytes <= uio->uio_resid); 1094 uioskip(uio, tx_bytes); 1095 } 1096 if (tx_bytes && vn_has_cached_data(vp)) { 1097 update_pages(vp, woff, tx_bytes, zfsvfs->z_os, 1098 zp->z_id, uio->uio_segflg, tx); 1099 } 1100 1101 /* 1102 * If we made no progress, we're done. If we made even 1103 * partial progress, update the znode and ZIL accordingly. 1104 */ 1105 if (tx_bytes == 0) { 1106 (void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs), 1107 (void *)&zp->z_size, sizeof (uint64_t), tx); 1108 dmu_tx_commit(tx); 1109 ASSERT(error != 0); 1110 break; 1111 } 1112 1113 /* 1114 * Clear Set-UID/Set-GID bits on successful write if not 1115 * privileged and at least one of the excute bits is set. 1116 * 1117 * It would be nice to to this after all writes have 1118 * been done, but that would still expose the ISUID/ISGID 1119 * to another app after the partial write is committed. 1120 * 1121 * Note: we don't call zfs_fuid_map_id() here because 1122 * user 0 is not an ephemeral uid. 1123 */ 1124 mutex_enter(&zp->z_acl_lock); 1125 if ((zp->z_mode & (S_IXUSR | (S_IXUSR >> 3) | 1126 (S_IXUSR >> 6))) != 0 && 1127 (zp->z_mode & (S_ISUID | S_ISGID)) != 0 && 1128 secpolicy_vnode_setid_retain(vp, cr, 1129 (zp->z_mode & S_ISUID) != 0 && zp->z_uid == 0) != 0) { 1130 uint64_t newmode; 1131 zp->z_mode &= ~(S_ISUID | S_ISGID); 1132 newmode = zp->z_mode; 1133 (void) sa_update(zp->z_sa_hdl, SA_ZPL_MODE(zfsvfs), 1134 (void *)&newmode, sizeof (uint64_t), tx); 1135 } 1136 mutex_exit(&zp->z_acl_lock); 1137 1138 zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime, 1139 B_TRUE); 1140 1141 /* 1142 * Update the file size (zp_size) if it has changed; 1143 * account for possible concurrent updates. 1144 */ 1145 while ((end_size = zp->z_size) < uio->uio_loffset) { 1146 (void) atomic_cas_64(&zp->z_size, end_size, 1147 uio->uio_loffset); 1148 ASSERT(error == 0); 1149 } 1150 /* 1151 * If we are replaying and eof is non zero then force 1152 * the file size to the specified eof. Note, there's no 1153 * concurrency during replay. 1154 */ 1155 if (zfsvfs->z_replay && zfsvfs->z_replay_eof != 0) 1156 zp->z_size = zfsvfs->z_replay_eof; 1157 1158 error = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx); 1159 1160 zfs_log_write(zilog, tx, TX_WRITE, zp, woff, tx_bytes, ioflag); 1161 dmu_tx_commit(tx); 1162 1163 if (error != 0) 1164 break; 1165 ASSERT(tx_bytes == nbytes); 1166 n -= nbytes; 1167 1168#ifdef sun 1169 if (!xuio && n > 0) 1170 uio_prefaultpages(MIN(n, max_blksz), uio); 1171#endif /* sun */ 1172 } 1173 1174 zfs_range_unlock(rl); 1175 1176 /* 1177 * If we're in replay mode, or we made no progress, return error. 1178 * Otherwise, it's at least a partial write, so it's successful. 1179 */ 1180 if (zfsvfs->z_replay || uio->uio_resid == start_resid) { 1181 ZFS_EXIT(zfsvfs); 1182 return (error); 1183 } 1184 1185 if (ioflag & (FSYNC | FDSYNC) || 1186 zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 1187 zil_commit(zilog, zp->z_id); 1188 1189 ZFS_EXIT(zfsvfs); 1190 return (0); 1191} 1192 1193void 1194zfs_get_done(zgd_t *zgd, int error) 1195{ 1196 znode_t *zp = zgd->zgd_private; 1197 objset_t *os = zp->z_zfsvfs->z_os; 1198 1199 if (zgd->zgd_db) 1200 dmu_buf_rele(zgd->zgd_db, zgd); 1201 1202 zfs_range_unlock(zgd->zgd_rl); 1203 1204 /* 1205 * Release the vnode asynchronously as we currently have the 1206 * txg stopped from syncing. 1207 */ 1208 VN_RELE_ASYNC(ZTOV(zp), dsl_pool_vnrele_taskq(dmu_objset_pool(os))); 1209 1210 if (error == 0 && zgd->zgd_bp) 1211 zil_add_block(zgd->zgd_zilog, zgd->zgd_bp); 1212 1213 kmem_free(zgd, sizeof (zgd_t)); 1214} 1215 1216#ifdef DEBUG 1217static int zil_fault_io = 0; 1218#endif 1219 1220/* 1221 * Get data to generate a TX_WRITE intent log record. 1222 */ 1223int 1224zfs_get_data(void *arg, lr_write_t *lr, char *buf, zio_t *zio) 1225{ 1226 zfsvfs_t *zfsvfs = arg; 1227 objset_t *os = zfsvfs->z_os; 1228 znode_t *zp; 1229 uint64_t object = lr->lr_foid; 1230 uint64_t offset = lr->lr_offset; 1231 uint64_t size = lr->lr_length; 1232 blkptr_t *bp = &lr->lr_blkptr; 1233 dmu_buf_t *db; 1234 zgd_t *zgd; 1235 int error = 0; 1236 1237 ASSERT(zio != NULL); 1238 ASSERT(size != 0); 1239 1240 /* 1241 * Nothing to do if the file has been removed 1242 */ 1243 if (zfs_zget(zfsvfs, object, &zp) != 0) 1244 return (SET_ERROR(ENOENT)); 1245 if (zp->z_unlinked) { 1246 /* 1247 * Release the vnode asynchronously as we currently have the 1248 * txg stopped from syncing. 1249 */ 1250 VN_RELE_ASYNC(ZTOV(zp), 1251 dsl_pool_vnrele_taskq(dmu_objset_pool(os))); 1252 return (SET_ERROR(ENOENT)); 1253 } 1254 1255 zgd = (zgd_t *)kmem_zalloc(sizeof (zgd_t), KM_SLEEP); 1256 zgd->zgd_zilog = zfsvfs->z_log; 1257 zgd->zgd_private = zp; 1258 1259 /* 1260 * Write records come in two flavors: immediate and indirect. 1261 * For small writes it's cheaper to store the data with the 1262 * log record (immediate); for large writes it's cheaper to 1263 * sync the data and get a pointer to it (indirect) so that 1264 * we don't have to write the data twice. 1265 */ 1266 if (buf != NULL) { /* immediate write */ 1267 zgd->zgd_rl = zfs_range_lock(zp, offset, size, RL_READER); 1268 /* test for truncation needs to be done while range locked */ 1269 if (offset >= zp->z_size) { 1270 error = SET_ERROR(ENOENT); 1271 } else { 1272 error = dmu_read(os, object, offset, size, buf, 1273 DMU_READ_NO_PREFETCH); 1274 } 1275 ASSERT(error == 0 || error == ENOENT); 1276 } else { /* indirect write */ 1277 /* 1278 * Have to lock the whole block to ensure when it's 1279 * written out and it's checksum is being calculated 1280 * that no one can change the data. We need to re-check 1281 * blocksize after we get the lock in case it's changed! 1282 */ 1283 for (;;) { 1284 uint64_t blkoff; 1285 size = zp->z_blksz; 1286 blkoff = ISP2(size) ? P2PHASE(offset, size) : offset; 1287 offset -= blkoff; 1288 zgd->zgd_rl = zfs_range_lock(zp, offset, size, 1289 RL_READER); 1290 if (zp->z_blksz == size) 1291 break; 1292 offset += blkoff; 1293 zfs_range_unlock(zgd->zgd_rl); 1294 } 1295 /* test for truncation needs to be done while range locked */ 1296 if (lr->lr_offset >= zp->z_size) 1297 error = SET_ERROR(ENOENT); 1298#ifdef DEBUG 1299 if (zil_fault_io) { 1300 error = SET_ERROR(EIO); 1301 zil_fault_io = 0; 1302 } 1303#endif 1304 if (error == 0) 1305 error = dmu_buf_hold(os, object, offset, zgd, &db, 1306 DMU_READ_NO_PREFETCH); 1307 1308 if (error == 0) { 1309 blkptr_t *obp = dmu_buf_get_blkptr(db); 1310 if (obp) { 1311 ASSERT(BP_IS_HOLE(bp)); 1312 *bp = *obp; 1313 } 1314 1315 zgd->zgd_db = db; 1316 zgd->zgd_bp = bp; 1317 1318 ASSERT(db->db_offset == offset); 1319 ASSERT(db->db_size == size); 1320 1321 error = dmu_sync(zio, lr->lr_common.lrc_txg, 1322 zfs_get_done, zgd); 1323 ASSERT(error || lr->lr_length <= zp->z_blksz); 1324 1325 /* 1326 * On success, we need to wait for the write I/O 1327 * initiated by dmu_sync() to complete before we can 1328 * release this dbuf. We will finish everything up 1329 * in the zfs_get_done() callback. 1330 */ 1331 if (error == 0) 1332 return (0); 1333 1334 if (error == EALREADY) { 1335 lr->lr_common.lrc_txtype = TX_WRITE2; 1336 error = 0; 1337 } 1338 } 1339 } 1340 1341 zfs_get_done(zgd, error); 1342 1343 return (error); 1344} 1345 1346/*ARGSUSED*/ 1347static int 1348zfs_access(vnode_t *vp, int mode, int flag, cred_t *cr, 1349 caller_context_t *ct) 1350{ 1351 znode_t *zp = VTOZ(vp); 1352 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 1353 int error; 1354 1355 ZFS_ENTER(zfsvfs); 1356 ZFS_VERIFY_ZP(zp); 1357 1358 if (flag & V_ACE_MASK) 1359 error = zfs_zaccess(zp, mode, flag, B_FALSE, cr); 1360 else 1361 error = zfs_zaccess_rwx(zp, mode, flag, cr); 1362 1363 ZFS_EXIT(zfsvfs); 1364 return (error); 1365} 1366 1367/* 1368 * If vnode is for a device return a specfs vnode instead. 1369 */ 1370static int 1371specvp_check(vnode_t **vpp, cred_t *cr) 1372{ 1373 int error = 0; 1374 1375 if (IS_DEVVP(*vpp)) { 1376 struct vnode *svp; 1377 1378 svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 1379 VN_RELE(*vpp); 1380 if (svp == NULL) 1381 error = SET_ERROR(ENOSYS); 1382 *vpp = svp; 1383 } 1384 return (error); 1385} 1386 1387 1388/* 1389 * Lookup an entry in a directory, or an extended attribute directory. 1390 * If it exists, return a held vnode reference for it. 1391 * 1392 * IN: dvp - vnode of directory to search. 1393 * nm - name of entry to lookup. 1394 * pnp - full pathname to lookup [UNUSED]. 1395 * flags - LOOKUP_XATTR set if looking for an attribute. 1396 * rdir - root directory vnode [UNUSED]. 1397 * cr - credentials of caller. 1398 * ct - caller context 1399 * direntflags - directory lookup flags 1400 * realpnp - returned pathname. 1401 * 1402 * OUT: vpp - vnode of located entry, NULL if not found. 1403 * 1404 * RETURN: 0 on success, error code on failure. 1405 * 1406 * Timestamps: 1407 * NA 1408 */ 1409/* ARGSUSED */ 1410static int 1411zfs_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, struct componentname *cnp, 1412 int nameiop, cred_t *cr, kthread_t *td, int flags) 1413{ 1414 znode_t *zdp = VTOZ(dvp); 1415 zfsvfs_t *zfsvfs = zdp->z_zfsvfs; 1416 int error = 0; 1417 int *direntflags = NULL; 1418 void *realpnp = NULL; 1419 1420 /* fast path */ 1421 if (!(flags & (LOOKUP_XATTR | FIGNORECASE))) { 1422 1423 if (dvp->v_type != VDIR) { 1424 return (SET_ERROR(ENOTDIR)); 1425 } else if (zdp->z_sa_hdl == NULL) { 1426 return (SET_ERROR(EIO)); 1427 } 1428 1429 if (nm[0] == 0 || (nm[0] == '.' && nm[1] == '\0')) { 1430 error = zfs_fastaccesschk_execute(zdp, cr); 1431 if (!error) { 1432 *vpp = dvp; 1433 VN_HOLD(*vpp); 1434 return (0); 1435 } 1436 return (error); 1437 } else { 1438 vnode_t *tvp = dnlc_lookup(dvp, nm); 1439 1440 if (tvp) { 1441 error = zfs_fastaccesschk_execute(zdp, cr); 1442 if (error) { 1443 VN_RELE(tvp); 1444 return (error); 1445 } 1446 if (tvp == DNLC_NO_VNODE) { 1447 VN_RELE(tvp); 1448 return (SET_ERROR(ENOENT)); 1449 } else { 1450 *vpp = tvp; 1451 return (specvp_check(vpp, cr)); 1452 } 1453 } 1454 } 1455 } 1456 1457 DTRACE_PROBE2(zfs__fastpath__lookup__miss, vnode_t *, dvp, char *, nm); 1458 1459 ZFS_ENTER(zfsvfs); 1460 ZFS_VERIFY_ZP(zdp); 1461 1462 *vpp = NULL; 1463 1464 if (flags & LOOKUP_XATTR) { 1465#ifdef TODO 1466 /* 1467 * If the xattr property is off, refuse the lookup request. 1468 */ 1469 if (!(zfsvfs->z_vfs->vfs_flag & VFS_XATTR)) { 1470 ZFS_EXIT(zfsvfs); 1471 return (SET_ERROR(EINVAL)); 1472 } 1473#endif 1474 1475 /* 1476 * We don't allow recursive attributes.. 1477 * Maybe someday we will. 1478 */ 1479 if (zdp->z_pflags & ZFS_XATTR) { 1480 ZFS_EXIT(zfsvfs); 1481 return (SET_ERROR(EINVAL)); 1482 } 1483 1484 if (error = zfs_get_xattrdir(VTOZ(dvp), vpp, cr, flags)) { 1485 ZFS_EXIT(zfsvfs); 1486 return (error); 1487 } 1488 1489 /* 1490 * Do we have permission to get into attribute directory? 1491 */ 1492 1493 if (error = zfs_zaccess(VTOZ(*vpp), ACE_EXECUTE, 0, 1494 B_FALSE, cr)) { 1495 VN_RELE(*vpp); 1496 *vpp = NULL; 1497 } 1498 1499 ZFS_EXIT(zfsvfs); 1500 return (error); 1501 } 1502 1503 if (dvp->v_type != VDIR) { 1504 ZFS_EXIT(zfsvfs); 1505 return (SET_ERROR(ENOTDIR)); 1506 } 1507 1508 /* 1509 * Check accessibility of directory. 1510 */ 1511 1512 if (error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr)) { 1513 ZFS_EXIT(zfsvfs); 1514 return (error); 1515 } 1516 1517 if (zfsvfs->z_utf8 && u8_validate(nm, strlen(nm), 1518 NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1519 ZFS_EXIT(zfsvfs); 1520 return (SET_ERROR(EILSEQ)); 1521 } 1522 1523 error = zfs_dirlook(zdp, nm, vpp, flags, direntflags, realpnp); 1524 if (error == 0) 1525 error = specvp_check(vpp, cr); 1526 1527 /* Translate errors and add SAVENAME when needed. */ 1528 if (cnp->cn_flags & ISLASTCN) { 1529 switch (nameiop) { 1530 case CREATE: 1531 case RENAME: 1532 if (error == ENOENT) { 1533 error = EJUSTRETURN; 1534 cnp->cn_flags |= SAVENAME; 1535 break; 1536 } 1537 /* FALLTHROUGH */ 1538 case DELETE: 1539 if (error == 0) 1540 cnp->cn_flags |= SAVENAME; 1541 break; 1542 } 1543 } 1544 if (error == 0 && (nm[0] != '.' || nm[1] != '\0')) { 1545 int ltype = 0; 1546 1547 if (cnp->cn_flags & ISDOTDOT) { 1548 ltype = VOP_ISLOCKED(dvp); 1549 VOP_UNLOCK(dvp, 0); 1550 } 1551 ZFS_EXIT(zfsvfs); 1552 error = vn_lock(*vpp, cnp->cn_lkflags); 1553 if (cnp->cn_flags & ISDOTDOT) 1554 vn_lock(dvp, ltype | LK_RETRY); 1555 if (error != 0) { 1556 VN_RELE(*vpp); 1557 *vpp = NULL; 1558 return (error); 1559 } 1560 } else { 1561 ZFS_EXIT(zfsvfs); 1562 } 1563 1564#ifdef FREEBSD_NAMECACHE 1565 /* 1566 * Insert name into cache (as non-existent) if appropriate. 1567 */ 1568 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && nameiop != CREATE) 1569 cache_enter(dvp, *vpp, cnp); 1570 /* 1571 * Insert name into cache if appropriate. 1572 */ 1573 if (error == 0 && (cnp->cn_flags & MAKEENTRY)) { 1574 if (!(cnp->cn_flags & ISLASTCN) || 1575 (nameiop != DELETE && nameiop != RENAME)) { 1576 cache_enter(dvp, *vpp, cnp); 1577 } 1578 } 1579#endif 1580 1581 return (error); 1582} 1583 1584/* 1585 * Attempt to create a new entry in a directory. If the entry 1586 * already exists, truncate the file if permissible, else return 1587 * an error. Return the vp of the created or trunc'd file. 1588 * 1589 * IN: dvp - vnode of directory to put new file entry in. 1590 * name - name of new file entry. 1591 * vap - attributes of new file. 1592 * excl - flag indicating exclusive or non-exclusive mode. 1593 * mode - mode to open file with. 1594 * cr - credentials of caller. 1595 * flag - large file flag [UNUSED]. 1596 * ct - caller context 1597 * vsecp - ACL to be set 1598 * 1599 * OUT: vpp - vnode of created or trunc'd entry. 1600 * 1601 * RETURN: 0 on success, error code on failure. 1602 * 1603 * Timestamps: 1604 * dvp - ctime|mtime updated if new entry created 1605 * vp - ctime|mtime always, atime if new 1606 */ 1607 1608/* ARGSUSED */ 1609static int 1610zfs_create(vnode_t *dvp, char *name, vattr_t *vap, int excl, int mode, 1611 vnode_t **vpp, cred_t *cr, kthread_t *td) 1612{ 1613 znode_t *zp, *dzp = VTOZ(dvp); 1614 zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1615 zilog_t *zilog; 1616 objset_t *os; 1617 zfs_dirlock_t *dl; 1618 dmu_tx_t *tx; 1619 int error; 1620 ksid_t *ksid; 1621 uid_t uid; 1622 gid_t gid = crgetgid(cr); 1623 zfs_acl_ids_t acl_ids; 1624 boolean_t fuid_dirtied; 1625 boolean_t have_acl = B_FALSE; 1626 boolean_t waited = B_FALSE; 1627 void *vsecp = NULL; 1628 int flag = 0; 1629 1630 /* 1631 * If we have an ephemeral id, ACL, or XVATTR then 1632 * make sure file system is at proper version 1633 */ 1634 1635 ksid = crgetsid(cr, KSID_OWNER); 1636 if (ksid) 1637 uid = ksid_getid(ksid); 1638 else 1639 uid = crgetuid(cr); 1640 1641 if (zfsvfs->z_use_fuids == B_FALSE && 1642 (vsecp || (vap->va_mask & AT_XVATTR) || 1643 IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid))) 1644 return (SET_ERROR(EINVAL)); 1645 1646 ZFS_ENTER(zfsvfs); 1647 ZFS_VERIFY_ZP(dzp); 1648 os = zfsvfs->z_os; 1649 zilog = zfsvfs->z_log; 1650 1651 if (zfsvfs->z_utf8 && u8_validate(name, strlen(name), 1652 NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1653 ZFS_EXIT(zfsvfs); 1654 return (SET_ERROR(EILSEQ)); 1655 } 1656 1657 if (vap->va_mask & AT_XVATTR) { 1658 if ((error = secpolicy_xvattr(dvp, (xvattr_t *)vap, 1659 crgetuid(cr), cr, vap->va_type)) != 0) { 1660 ZFS_EXIT(zfsvfs); 1661 return (error); 1662 } 1663 } 1664top: 1665 *vpp = NULL; 1666 1667 if ((vap->va_mode & S_ISVTX) && secpolicy_vnode_stky_modify(cr)) 1668 vap->va_mode &= ~S_ISVTX; 1669 1670 if (*name == '\0') { 1671 /* 1672 * Null component name refers to the directory itself. 1673 */ 1674 VN_HOLD(dvp); 1675 zp = dzp; 1676 dl = NULL; 1677 error = 0; 1678 } else { 1679 /* possible VN_HOLD(zp) */ 1680 int zflg = 0; 1681 1682 if (flag & FIGNORECASE) 1683 zflg |= ZCILOOK; 1684 1685 error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1686 NULL, NULL); 1687 if (error) { 1688 if (have_acl) 1689 zfs_acl_ids_free(&acl_ids); 1690 if (strcmp(name, "..") == 0) 1691 error = SET_ERROR(EISDIR); 1692 ZFS_EXIT(zfsvfs); 1693 return (error); 1694 } 1695 } 1696 1697 if (zp == NULL) { 1698 uint64_t txtype; 1699 1700 /* 1701 * Create a new file object and update the directory 1702 * to reference it. 1703 */ 1704 if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 1705 if (have_acl) 1706 zfs_acl_ids_free(&acl_ids); 1707 goto out; 1708 } 1709 1710 /* 1711 * We only support the creation of regular files in 1712 * extended attribute directories. 1713 */ 1714 1715 if ((dzp->z_pflags & ZFS_XATTR) && 1716 (vap->va_type != VREG)) { 1717 if (have_acl) 1718 zfs_acl_ids_free(&acl_ids); 1719 error = SET_ERROR(EINVAL); 1720 goto out; 1721 } 1722 1723 if (!have_acl && (error = zfs_acl_ids_create(dzp, 0, vap, 1724 cr, vsecp, &acl_ids)) != 0) 1725 goto out; 1726 have_acl = B_TRUE; 1727 1728 if (zfs_acl_ids_overquota(zfsvfs, &acl_ids)) { 1729 zfs_acl_ids_free(&acl_ids); 1730 error = SET_ERROR(EDQUOT); 1731 goto out; 1732 } 1733 1734 tx = dmu_tx_create(os); 1735 1736 dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes + 1737 ZFS_SA_BASE_ATTR_SIZE); 1738 1739 fuid_dirtied = zfsvfs->z_fuid_dirty; 1740 if (fuid_dirtied) 1741 zfs_fuid_txhold(zfsvfs, tx); 1742 dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 1743 dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE); 1744 if (!zfsvfs->z_use_sa && 1745 acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) { 1746 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 1747 0, acl_ids.z_aclp->z_acl_bytes); 1748 } 1749 error = dmu_tx_assign(tx, waited ? TXG_WAITED : TXG_NOWAIT); 1750 if (error) { 1751 zfs_dirent_unlock(dl); 1752 if (error == ERESTART) { 1753 waited = B_TRUE; 1754 dmu_tx_wait(tx); 1755 dmu_tx_abort(tx); 1756 goto top; 1757 } 1758 zfs_acl_ids_free(&acl_ids); 1759 dmu_tx_abort(tx); 1760 ZFS_EXIT(zfsvfs); 1761 return (error); 1762 } 1763 zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids); 1764 1765 if (fuid_dirtied) 1766 zfs_fuid_sync(zfsvfs, tx); 1767 1768 (void) zfs_link_create(dl, zp, tx, ZNEW); 1769 txtype = zfs_log_create_txtype(Z_FILE, vsecp, vap); 1770 if (flag & FIGNORECASE) 1771 txtype |= TX_CI; 1772 zfs_log_create(zilog, tx, txtype, dzp, zp, name, 1773 vsecp, acl_ids.z_fuidp, vap); 1774 zfs_acl_ids_free(&acl_ids); 1775 dmu_tx_commit(tx); 1776 } else { 1777 int aflags = (flag & FAPPEND) ? V_APPEND : 0; 1778 1779 if (have_acl) 1780 zfs_acl_ids_free(&acl_ids); 1781 have_acl = B_FALSE; 1782 1783 /* 1784 * A directory entry already exists for this name. 1785 */ 1786 /* 1787 * Can't truncate an existing file if in exclusive mode. 1788 */ 1789 if (excl == EXCL) { 1790 error = SET_ERROR(EEXIST); 1791 goto out; 1792 } 1793 /* 1794 * Can't open a directory for writing. 1795 */ 1796 if ((ZTOV(zp)->v_type == VDIR) && (mode & S_IWRITE)) { 1797 error = SET_ERROR(EISDIR); 1798 goto out; 1799 } 1800 /* 1801 * Verify requested access to file. 1802 */ 1803 if (mode && (error = zfs_zaccess_rwx(zp, mode, aflags, cr))) { 1804 goto out; 1805 } 1806 1807 mutex_enter(&dzp->z_lock); 1808 dzp->z_seq++; 1809 mutex_exit(&dzp->z_lock); 1810 1811 /* 1812 * Truncate regular files if requested. 1813 */ 1814 if ((ZTOV(zp)->v_type == VREG) && 1815 (vap->va_mask & AT_SIZE) && (vap->va_size == 0)) { 1816 /* we can't hold any locks when calling zfs_freesp() */ 1817 zfs_dirent_unlock(dl); 1818 dl = NULL; 1819 error = zfs_freesp(zp, 0, 0, mode, TRUE); 1820 if (error == 0) { 1821 vnevent_create(ZTOV(zp), ct); 1822 } 1823 } 1824 } 1825out: 1826 if (dl) 1827 zfs_dirent_unlock(dl); 1828 1829 if (error) { 1830 if (zp) 1831 VN_RELE(ZTOV(zp)); 1832 } else { 1833 *vpp = ZTOV(zp); 1834 error = specvp_check(vpp, cr); 1835 } 1836 1837 if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 1838 zil_commit(zilog, 0); 1839 1840 ZFS_EXIT(zfsvfs); 1841 return (error); 1842} 1843 1844/* 1845 * Remove an entry from a directory. 1846 * 1847 * IN: dvp - vnode of directory to remove entry from. 1848 * name - name of entry to remove. 1849 * cr - credentials of caller. 1850 * ct - caller context 1851 * flags - case flags 1852 * 1853 * RETURN: 0 on success, error code on failure. 1854 * 1855 * Timestamps: 1856 * dvp - ctime|mtime 1857 * vp - ctime (if nlink > 0) 1858 */ 1859 1860uint64_t null_xattr = 0; 1861 1862/*ARGSUSED*/ 1863static int 1864zfs_remove(vnode_t *dvp, char *name, cred_t *cr, caller_context_t *ct, 1865 int flags) 1866{ 1867 znode_t *zp, *dzp = VTOZ(dvp); 1868 znode_t *xzp; 1869 vnode_t *vp; 1870 zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1871 zilog_t *zilog; 1872 uint64_t acl_obj, xattr_obj; 1873 uint64_t xattr_obj_unlinked = 0; 1874 uint64_t obj = 0; 1875 zfs_dirlock_t *dl; 1876 dmu_tx_t *tx; 1877 boolean_t may_delete_now, delete_now = FALSE; 1878 boolean_t unlinked, toobig = FALSE; 1879 uint64_t txtype; 1880 pathname_t *realnmp = NULL; 1881 pathname_t realnm; 1882 int error; 1883 int zflg = ZEXISTS; 1884 boolean_t waited = B_FALSE; 1885 1886 ZFS_ENTER(zfsvfs); 1887 ZFS_VERIFY_ZP(dzp); 1888 zilog = zfsvfs->z_log; 1889 1890 if (flags & FIGNORECASE) { 1891 zflg |= ZCILOOK; 1892 pn_alloc(&realnm); 1893 realnmp = &realnm; 1894 } 1895 1896top: 1897 xattr_obj = 0; 1898 xzp = NULL; 1899 /* 1900 * Attempt to lock directory; fail if entry doesn't exist. 1901 */ 1902 if (error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1903 NULL, realnmp)) { 1904 if (realnmp) 1905 pn_free(realnmp); 1906 ZFS_EXIT(zfsvfs); 1907 return (error); 1908 } 1909 1910 vp = ZTOV(zp); 1911 1912 if (error = zfs_zaccess_delete(dzp, zp, cr)) { 1913 goto out; 1914 } 1915 1916 /* 1917 * Need to use rmdir for removing directories. 1918 */ 1919 if (vp->v_type == VDIR) { 1920 error = SET_ERROR(EPERM); 1921 goto out; 1922 } 1923 1924 vnevent_remove(vp, dvp, name, ct); 1925 1926 if (realnmp) 1927 dnlc_remove(dvp, realnmp->pn_buf); 1928 else 1929 dnlc_remove(dvp, name); 1930 1931 VI_LOCK(vp); 1932 may_delete_now = vp->v_count == 1 && !vn_has_cached_data(vp); 1933 VI_UNLOCK(vp); 1934 1935 /* 1936 * We may delete the znode now, or we may put it in the unlinked set; 1937 * it depends on whether we're the last link, and on whether there are 1938 * other holds on the vnode. So we dmu_tx_hold() the right things to 1939 * allow for either case. 1940 */ 1941 obj = zp->z_id; 1942 tx = dmu_tx_create(zfsvfs->z_os); 1943 dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); 1944 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); 1945 zfs_sa_upgrade_txholds(tx, zp); 1946 zfs_sa_upgrade_txholds(tx, dzp); 1947 if (may_delete_now) { 1948 toobig = 1949 zp->z_size > zp->z_blksz * DMU_MAX_DELETEBLKCNT; 1950 /* if the file is too big, only hold_free a token amount */ 1951 dmu_tx_hold_free(tx, zp->z_id, 0, 1952 (toobig ? DMU_MAX_ACCESS : DMU_OBJECT_END)); 1953 } 1954 1955 /* are there any extended attributes? */ 1956 error = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs), 1957 &xattr_obj, sizeof (xattr_obj)); 1958 if (error == 0 && xattr_obj) { 1959 error = zfs_zget(zfsvfs, xattr_obj, &xzp); 1960 ASSERT0(error); 1961 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); 1962 dmu_tx_hold_sa(tx, xzp->z_sa_hdl, B_FALSE); 1963 } 1964 1965 mutex_enter(&zp->z_lock); 1966 if ((acl_obj = zfs_external_acl(zp)) != 0 && may_delete_now) 1967 dmu_tx_hold_free(tx, acl_obj, 0, DMU_OBJECT_END); 1968 mutex_exit(&zp->z_lock); 1969 1970 /* charge as an update -- would be nice not to charge at all */ 1971 dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 1972 1973 error = dmu_tx_assign(tx, waited ? TXG_WAITED : TXG_NOWAIT); 1974 if (error) { 1975 zfs_dirent_unlock(dl); 1976 VN_RELE(vp); 1977 if (xzp) 1978 VN_RELE(ZTOV(xzp)); 1979 if (error == ERESTART) { 1980 waited = B_TRUE; 1981 dmu_tx_wait(tx); 1982 dmu_tx_abort(tx); 1983 goto top; 1984 } 1985 if (realnmp) 1986 pn_free(realnmp); 1987 dmu_tx_abort(tx); 1988 ZFS_EXIT(zfsvfs); 1989 return (error); 1990 } 1991 1992 /* 1993 * Remove the directory entry. 1994 */ 1995 error = zfs_link_destroy(dl, zp, tx, zflg, &unlinked); 1996 1997 if (error) { 1998 dmu_tx_commit(tx); 1999 goto out; 2000 } 2001 2002 if (unlinked) { 2003 2004 /* 2005 * Hold z_lock so that we can make sure that the ACL obj 2006 * hasn't changed. Could have been deleted due to 2007 * zfs_sa_upgrade(). 2008 */ 2009 mutex_enter(&zp->z_lock); 2010 VI_LOCK(vp); 2011 (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs), 2012 &xattr_obj_unlinked, sizeof (xattr_obj_unlinked)); 2013 delete_now = may_delete_now && !toobig && 2014 vp->v_count == 1 && !vn_has_cached_data(vp) && 2015 xattr_obj == xattr_obj_unlinked && zfs_external_acl(zp) == 2016 acl_obj; 2017 VI_UNLOCK(vp); 2018 } 2019 2020 if (delete_now) { 2021#ifdef __FreeBSD__ 2022 panic("zfs_remove: delete_now branch taken"); 2023#endif 2024 if (xattr_obj_unlinked) { 2025 ASSERT3U(xzp->z_links, ==, 2); 2026 mutex_enter(&xzp->z_lock); 2027 xzp->z_unlinked = 1; 2028 xzp->z_links = 0; 2029 error = sa_update(xzp->z_sa_hdl, SA_ZPL_LINKS(zfsvfs), 2030 &xzp->z_links, sizeof (xzp->z_links), tx); 2031 ASSERT3U(error, ==, 0); 2032 mutex_exit(&xzp->z_lock); 2033 zfs_unlinked_add(xzp, tx); 2034 2035 if (zp->z_is_sa) 2036 error = sa_remove(zp->z_sa_hdl, 2037 SA_ZPL_XATTR(zfsvfs), tx); 2038 else 2039 error = sa_update(zp->z_sa_hdl, 2040 SA_ZPL_XATTR(zfsvfs), &null_xattr, 2041 sizeof (uint64_t), tx); 2042 ASSERT0(error); 2043 } 2044 VI_LOCK(vp); 2045 vp->v_count--; 2046 ASSERT0(vp->v_count); 2047 VI_UNLOCK(vp); 2048 mutex_exit(&zp->z_lock); 2049 zfs_znode_delete(zp, tx); 2050 } else if (unlinked) { 2051 mutex_exit(&zp->z_lock); 2052 zfs_unlinked_add(zp, tx); 2053#ifdef __FreeBSD__ 2054 vp->v_vflag |= VV_NOSYNC; 2055#endif 2056 } 2057 2058 txtype = TX_REMOVE; 2059 if (flags & FIGNORECASE) 2060 txtype |= TX_CI; 2061 zfs_log_remove(zilog, tx, txtype, dzp, name, obj); 2062 2063 dmu_tx_commit(tx); 2064out: 2065 if (realnmp) 2066 pn_free(realnmp); 2067 2068 zfs_dirent_unlock(dl); 2069 2070 if (!delete_now) 2071 VN_RELE(vp); 2072 if (xzp) 2073 VN_RELE(ZTOV(xzp)); 2074 2075 if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 2076 zil_commit(zilog, 0); 2077 2078 ZFS_EXIT(zfsvfs); 2079 return (error); 2080} 2081 2082/* 2083 * Create a new directory and insert it into dvp using the name 2084 * provided. Return a pointer to the inserted directory. 2085 * 2086 * IN: dvp - vnode of directory to add subdir to. 2087 * dirname - name of new directory. 2088 * vap - attributes of new directory. 2089 * cr - credentials of caller. 2090 * ct - caller context 2091 * flags - case flags 2092 * vsecp - ACL to be set 2093 * 2094 * OUT: vpp - vnode of created directory. 2095 * 2096 * RETURN: 0 on success, error code on failure. 2097 * 2098 * Timestamps: 2099 * dvp - ctime|mtime updated 2100 * vp - ctime|mtime|atime updated 2101 */ 2102/*ARGSUSED*/ 2103static int 2104zfs_mkdir(vnode_t *dvp, char *dirname, vattr_t *vap, vnode_t **vpp, cred_t *cr, 2105 caller_context_t *ct, int flags, vsecattr_t *vsecp) 2106{ 2107 znode_t *zp, *dzp = VTOZ(dvp); 2108 zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 2109 zilog_t *zilog; 2110 zfs_dirlock_t *dl; 2111 uint64_t txtype; 2112 dmu_tx_t *tx; 2113 int error; 2114 int zf = ZNEW; 2115 ksid_t *ksid; 2116 uid_t uid; 2117 gid_t gid = crgetgid(cr); 2118 zfs_acl_ids_t acl_ids; 2119 boolean_t fuid_dirtied; 2120 boolean_t waited = B_FALSE; 2121 2122 ASSERT(vap->va_type == VDIR); 2123 2124 /* 2125 * If we have an ephemeral id, ACL, or XVATTR then 2126 * make sure file system is at proper version 2127 */ 2128 2129 ksid = crgetsid(cr, KSID_OWNER); 2130 if (ksid) 2131 uid = ksid_getid(ksid); 2132 else 2133 uid = crgetuid(cr); 2134 if (zfsvfs->z_use_fuids == B_FALSE && 2135 (vsecp || (vap->va_mask & AT_XVATTR) || 2136 IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid))) 2137 return (SET_ERROR(EINVAL)); 2138 2139 ZFS_ENTER(zfsvfs); 2140 ZFS_VERIFY_ZP(dzp); 2141 zilog = zfsvfs->z_log; 2142 2143 if (dzp->z_pflags & ZFS_XATTR) { 2144 ZFS_EXIT(zfsvfs); 2145 return (SET_ERROR(EINVAL)); 2146 } 2147 2148 if (zfsvfs->z_utf8 && u8_validate(dirname, 2149 strlen(dirname), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 2150 ZFS_EXIT(zfsvfs); 2151 return (SET_ERROR(EILSEQ)); 2152 } 2153 if (flags & FIGNORECASE) 2154 zf |= ZCILOOK; 2155 2156 if (vap->va_mask & AT_XVATTR) { 2157 if ((error = secpolicy_xvattr(dvp, (xvattr_t *)vap, 2158 crgetuid(cr), cr, vap->va_type)) != 0) { 2159 ZFS_EXIT(zfsvfs); 2160 return (error); 2161 } 2162 } 2163 2164 if ((error = zfs_acl_ids_create(dzp, 0, vap, cr, 2165 vsecp, &acl_ids)) != 0) { 2166 ZFS_EXIT(zfsvfs); 2167 return (error); 2168 } 2169 /* 2170 * First make sure the new directory doesn't exist. 2171 * 2172 * Existence is checked first to make sure we don't return 2173 * EACCES instead of EEXIST which can cause some applications 2174 * to fail. 2175 */ 2176top: 2177 *vpp = NULL; 2178 2179 if (error = zfs_dirent_lock(&dl, dzp, dirname, &zp, zf, 2180 NULL, NULL)) { 2181 zfs_acl_ids_free(&acl_ids); 2182 ZFS_EXIT(zfsvfs); 2183 return (error); 2184 } 2185 2186 if (error = zfs_zaccess(dzp, ACE_ADD_SUBDIRECTORY, 0, B_FALSE, cr)) { 2187 zfs_acl_ids_free(&acl_ids); 2188 zfs_dirent_unlock(dl); 2189 ZFS_EXIT(zfsvfs); 2190 return (error); 2191 } 2192 2193 if (zfs_acl_ids_overquota(zfsvfs, &acl_ids)) { 2194 zfs_acl_ids_free(&acl_ids); 2195 zfs_dirent_unlock(dl); 2196 ZFS_EXIT(zfsvfs); 2197 return (SET_ERROR(EDQUOT)); 2198 } 2199 2200 /* 2201 * Add a new entry to the directory. 2202 */ 2203 tx = dmu_tx_create(zfsvfs->z_os); 2204 dmu_tx_hold_zap(tx, dzp->z_id, TRUE, dirname); 2205 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 2206 fuid_dirtied = zfsvfs->z_fuid_dirty; 2207 if (fuid_dirtied) 2208 zfs_fuid_txhold(zfsvfs, tx); 2209 if (!zfsvfs->z_use_sa && acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) { 2210 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 2211 acl_ids.z_aclp->z_acl_bytes); 2212 } 2213 2214 dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes + 2215 ZFS_SA_BASE_ATTR_SIZE); 2216 2217 error = dmu_tx_assign(tx, waited ? TXG_WAITED : TXG_NOWAIT); 2218 if (error) { 2219 zfs_dirent_unlock(dl); 2220 if (error == ERESTART) { 2221 waited = B_TRUE; 2222 dmu_tx_wait(tx); 2223 dmu_tx_abort(tx); 2224 goto top; 2225 } 2226 zfs_acl_ids_free(&acl_ids); 2227 dmu_tx_abort(tx); 2228 ZFS_EXIT(zfsvfs); 2229 return (error); 2230 } 2231 2232 /* 2233 * Create new node. 2234 */ 2235 zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids); 2236 2237 if (fuid_dirtied) 2238 zfs_fuid_sync(zfsvfs, tx); 2239 2240 /* 2241 * Now put new name in parent dir. 2242 */ 2243 (void) zfs_link_create(dl, zp, tx, ZNEW); 2244 2245 *vpp = ZTOV(zp); 2246 2247 txtype = zfs_log_create_txtype(Z_DIR, vsecp, vap); 2248 if (flags & FIGNORECASE) 2249 txtype |= TX_CI; 2250 zfs_log_create(zilog, tx, txtype, dzp, zp, dirname, vsecp, 2251 acl_ids.z_fuidp, vap); 2252 2253 zfs_acl_ids_free(&acl_ids); 2254 2255 dmu_tx_commit(tx); 2256 2257 zfs_dirent_unlock(dl); 2258 2259 if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 2260 zil_commit(zilog, 0); 2261 2262 ZFS_EXIT(zfsvfs); 2263 return (0); 2264} 2265 2266/* 2267 * Remove a directory subdir entry. If the current working 2268 * directory is the same as the subdir to be removed, the 2269 * remove will fail. 2270 * 2271 * IN: dvp - vnode of directory to remove from. 2272 * name - name of directory to be removed. 2273 * cwd - vnode of current working directory. 2274 * cr - credentials of caller. 2275 * ct - caller context 2276 * flags - case flags 2277 * 2278 * RETURN: 0 on success, error code on failure. 2279 * 2280 * Timestamps: 2281 * dvp - ctime|mtime updated 2282 */ 2283/*ARGSUSED*/ 2284static int 2285zfs_rmdir(vnode_t *dvp, char *name, vnode_t *cwd, cred_t *cr, 2286 caller_context_t *ct, int flags) 2287{ 2288 znode_t *dzp = VTOZ(dvp); 2289 znode_t *zp; 2290 vnode_t *vp; 2291 zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 2292 zilog_t *zilog; 2293 zfs_dirlock_t *dl; 2294 dmu_tx_t *tx; 2295 int error; 2296 int zflg = ZEXISTS; 2297 boolean_t waited = B_FALSE; 2298 2299 ZFS_ENTER(zfsvfs); 2300 ZFS_VERIFY_ZP(dzp); 2301 zilog = zfsvfs->z_log; 2302 2303 if (flags & FIGNORECASE) 2304 zflg |= ZCILOOK; 2305top: 2306 zp = NULL; 2307 2308 /* 2309 * Attempt to lock directory; fail if entry doesn't exist. 2310 */ 2311 if (error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 2312 NULL, NULL)) { 2313 ZFS_EXIT(zfsvfs); 2314 return (error); 2315 } 2316 2317 vp = ZTOV(zp); 2318 2319 if (error = zfs_zaccess_delete(dzp, zp, cr)) { 2320 goto out; 2321 } 2322 2323 if (vp->v_type != VDIR) { 2324 error = SET_ERROR(ENOTDIR); 2325 goto out; 2326 } 2327 2328 if (vp == cwd) { 2329 error = SET_ERROR(EINVAL); 2330 goto out; 2331 } 2332 2333 vnevent_rmdir(vp, dvp, name, ct); 2334 2335 /* 2336 * Grab a lock on the directory to make sure that noone is 2337 * trying to add (or lookup) entries while we are removing it. 2338 */ 2339 rw_enter(&zp->z_name_lock, RW_WRITER); 2340 2341 /* 2342 * Grab a lock on the parent pointer to make sure we play well 2343 * with the treewalk and directory rename code. 2344 */ 2345 rw_enter(&zp->z_parent_lock, RW_WRITER); 2346 2347 tx = dmu_tx_create(zfsvfs->z_os); 2348 dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); 2349 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); 2350 dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 2351 zfs_sa_upgrade_txholds(tx, zp); 2352 zfs_sa_upgrade_txholds(tx, dzp); 2353 error = dmu_tx_assign(tx, waited ? TXG_WAITED : TXG_NOWAIT); 2354 if (error) { 2355 rw_exit(&zp->z_parent_lock); 2356 rw_exit(&zp->z_name_lock); 2357 zfs_dirent_unlock(dl); 2358 VN_RELE(vp); 2359 if (error == ERESTART) { 2360 waited = B_TRUE; 2361 dmu_tx_wait(tx); 2362 dmu_tx_abort(tx); 2363 goto top; 2364 } 2365 dmu_tx_abort(tx); 2366 ZFS_EXIT(zfsvfs); 2367 return (error); 2368 } 2369 2370#ifdef FREEBSD_NAMECACHE 2371 cache_purge(dvp); 2372#endif 2373 2374 error = zfs_link_destroy(dl, zp, tx, zflg, NULL); 2375 2376 if (error == 0) { 2377 uint64_t txtype = TX_RMDIR; 2378 if (flags & FIGNORECASE) 2379 txtype |= TX_CI; 2380 zfs_log_remove(zilog, tx, txtype, dzp, name, ZFS_NO_OBJECT); 2381 } 2382 2383 dmu_tx_commit(tx); 2384 2385 rw_exit(&zp->z_parent_lock); 2386 rw_exit(&zp->z_name_lock); 2387#ifdef FREEBSD_NAMECACHE 2388 cache_purge(vp); 2389#endif 2390out: 2391 zfs_dirent_unlock(dl); 2392 2393 VN_RELE(vp); 2394 2395 if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 2396 zil_commit(zilog, 0); 2397 2398 ZFS_EXIT(zfsvfs); 2399 return (error); 2400} 2401 2402/* 2403 * Read as many directory entries as will fit into the provided 2404 * buffer from the given directory cursor position (specified in 2405 * the uio structure). 2406 * 2407 * IN: vp - vnode of directory to read. 2408 * uio - structure supplying read location, range info, 2409 * and return buffer. 2410 * cr - credentials of caller. 2411 * ct - caller context 2412 * flags - case flags 2413 * 2414 * OUT: uio - updated offset and range, buffer filled. 2415 * eofp - set to true if end-of-file detected. 2416 * 2417 * RETURN: 0 on success, error code on failure. 2418 * 2419 * Timestamps: 2420 * vp - atime updated 2421 * 2422 * Note that the low 4 bits of the cookie returned by zap is always zero. 2423 * This allows us to use the low range for "special" directory entries: 2424 * We use 0 for '.', and 1 for '..'. If this is the root of the filesystem, 2425 * we use the offset 2 for the '.zfs' directory. 2426 */ 2427/* ARGSUSED */ 2428static int 2429zfs_readdir(vnode_t *vp, uio_t *uio, cred_t *cr, int *eofp, int *ncookies, u_long **cookies) 2430{ 2431 znode_t *zp = VTOZ(vp); 2432 iovec_t *iovp; 2433 edirent_t *eodp; 2434 dirent64_t *odp; 2435 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2436 objset_t *os; 2437 caddr_t outbuf; 2438 size_t bufsize; 2439 zap_cursor_t zc; 2440 zap_attribute_t zap; 2441 uint_t bytes_wanted; 2442 uint64_t offset; /* must be unsigned; checks for < 1 */ 2443 uint64_t parent; 2444 int local_eof; 2445 int outcount; 2446 int error; 2447 uint8_t prefetch; 2448 boolean_t check_sysattrs; 2449 uint8_t type; 2450 int ncooks; 2451 u_long *cooks = NULL; 2452 int flags = 0; 2453 2454 ZFS_ENTER(zfsvfs); 2455 ZFS_VERIFY_ZP(zp); 2456 2457 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs), 2458 &parent, sizeof (parent))) != 0) { 2459 ZFS_EXIT(zfsvfs); 2460 return (error); 2461 } 2462 2463 /* 2464 * If we are not given an eof variable, 2465 * use a local one. 2466 */ 2467 if (eofp == NULL) 2468 eofp = &local_eof; 2469 2470 /* 2471 * Check for valid iov_len. 2472 */ 2473 if (uio->uio_iov->iov_len <= 0) { 2474 ZFS_EXIT(zfsvfs); 2475 return (SET_ERROR(EINVAL)); 2476 } 2477 2478 /* 2479 * Quit if directory has been removed (posix) 2480 */ 2481 if ((*eofp = zp->z_unlinked) != 0) { 2482 ZFS_EXIT(zfsvfs); 2483 return (0); 2484 } 2485 2486 error = 0; 2487 os = zfsvfs->z_os; 2488 offset = uio->uio_loffset; 2489 prefetch = zp->z_zn_prefetch; 2490 2491 /* 2492 * Initialize the iterator cursor. 2493 */ 2494 if (offset <= 3) { 2495 /* 2496 * Start iteration from the beginning of the directory. 2497 */ 2498 zap_cursor_init(&zc, os, zp->z_id); 2499 } else { 2500 /* 2501 * The offset is a serialized cursor. 2502 */ 2503 zap_cursor_init_serialized(&zc, os, zp->z_id, offset); 2504 } 2505 2506 /* 2507 * Get space to change directory entries into fs independent format. 2508 */ 2509 iovp = uio->uio_iov; 2510 bytes_wanted = iovp->iov_len; 2511 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) { 2512 bufsize = bytes_wanted; 2513 outbuf = kmem_alloc(bufsize, KM_SLEEP); 2514 odp = (struct dirent64 *)outbuf; 2515 } else { 2516 bufsize = bytes_wanted; 2517 outbuf = NULL; 2518 odp = (struct dirent64 *)iovp->iov_base; 2519 } 2520 eodp = (struct edirent *)odp; 2521 2522 if (ncookies != NULL) { 2523 /* 2524 * Minimum entry size is dirent size and 1 byte for a file name. 2525 */ 2526 ncooks = uio->uio_resid / (sizeof(struct dirent) - sizeof(((struct dirent *)NULL)->d_name) + 1); 2527 cooks = malloc(ncooks * sizeof(u_long), M_TEMP, M_WAITOK); 2528 *cookies = cooks; 2529 *ncookies = ncooks; 2530 } 2531 /* 2532 * If this VFS supports the system attribute view interface; and 2533 * we're looking at an extended attribute directory; and we care 2534 * about normalization conflicts on this vfs; then we must check 2535 * for normalization conflicts with the sysattr name space. 2536 */ 2537#ifdef TODO 2538 check_sysattrs = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) && 2539 (vp->v_flag & V_XATTRDIR) && zfsvfs->z_norm && 2540 (flags & V_RDDIR_ENTFLAGS); 2541#else 2542 check_sysattrs = 0; 2543#endif 2544 2545 /* 2546 * Transform to file-system independent format 2547 */ 2548 outcount = 0; 2549 while (outcount < bytes_wanted) { 2550 ino64_t objnum; 2551 ushort_t reclen; 2552 off64_t *next = NULL; 2553 2554 /* 2555 * Special case `.', `..', and `.zfs'. 2556 */ 2557 if (offset == 0) { 2558 (void) strcpy(zap.za_name, "."); 2559 zap.za_normalization_conflict = 0; 2560 objnum = zp->z_id; 2561 type = DT_DIR; 2562 } else if (offset == 1) { 2563 (void) strcpy(zap.za_name, ".."); 2564 zap.za_normalization_conflict = 0; 2565 objnum = parent; 2566 type = DT_DIR; 2567 } else if (offset == 2 && zfs_show_ctldir(zp)) { 2568 (void) strcpy(zap.za_name, ZFS_CTLDIR_NAME); 2569 zap.za_normalization_conflict = 0; 2570 objnum = ZFSCTL_INO_ROOT; 2571 type = DT_DIR; 2572 } else { 2573 /* 2574 * Grab next entry. 2575 */ 2576 if (error = zap_cursor_retrieve(&zc, &zap)) { 2577 if ((*eofp = (error == ENOENT)) != 0) 2578 break; 2579 else 2580 goto update; 2581 } 2582 2583 if (zap.za_integer_length != 8 || 2584 zap.za_num_integers != 1) { 2585 cmn_err(CE_WARN, "zap_readdir: bad directory " 2586 "entry, obj = %lld, offset = %lld\n", 2587 (u_longlong_t)zp->z_id, 2588 (u_longlong_t)offset); 2589 error = SET_ERROR(ENXIO); 2590 goto update; 2591 } 2592 2593 objnum = ZFS_DIRENT_OBJ(zap.za_first_integer); 2594 /* 2595 * MacOS X can extract the object type here such as: 2596 * uint8_t type = ZFS_DIRENT_TYPE(zap.za_first_integer); 2597 */ 2598 type = ZFS_DIRENT_TYPE(zap.za_first_integer); 2599 2600 if (check_sysattrs && !zap.za_normalization_conflict) { 2601#ifdef TODO 2602 zap.za_normalization_conflict = 2603 xattr_sysattr_casechk(zap.za_name); 2604#else 2605 panic("%s:%u: TODO", __func__, __LINE__); 2606#endif 2607 } 2608 } 2609 2610 if (flags & V_RDDIR_ACCFILTER) { 2611 /* 2612 * If we have no access at all, don't include 2613 * this entry in the returned information 2614 */ 2615 znode_t *ezp; 2616 if (zfs_zget(zp->z_zfsvfs, objnum, &ezp) != 0) 2617 goto skip_entry; 2618 if (!zfs_has_access(ezp, cr)) { 2619 VN_RELE(ZTOV(ezp)); 2620 goto skip_entry; 2621 } 2622 VN_RELE(ZTOV(ezp)); 2623 } 2624 2625 if (flags & V_RDDIR_ENTFLAGS) 2626 reclen = EDIRENT_RECLEN(strlen(zap.za_name)); 2627 else 2628 reclen = DIRENT64_RECLEN(strlen(zap.za_name)); 2629 2630 /* 2631 * Will this entry fit in the buffer? 2632 */ 2633 if (outcount + reclen > bufsize) { 2634 /* 2635 * Did we manage to fit anything in the buffer? 2636 */ 2637 if (!outcount) { 2638 error = SET_ERROR(EINVAL); 2639 goto update; 2640 } 2641 break; 2642 } 2643 if (flags & V_RDDIR_ENTFLAGS) { 2644 /* 2645 * Add extended flag entry: 2646 */ 2647 eodp->ed_ino = objnum; 2648 eodp->ed_reclen = reclen; 2649 /* NOTE: ed_off is the offset for the *next* entry */ 2650 next = &(eodp->ed_off); 2651 eodp->ed_eflags = zap.za_normalization_conflict ? 2652 ED_CASE_CONFLICT : 0; 2653 (void) strncpy(eodp->ed_name, zap.za_name, 2654 EDIRENT_NAMELEN(reclen)); 2655 eodp = (edirent_t *)((intptr_t)eodp + reclen); 2656 } else { 2657 /* 2658 * Add normal entry: 2659 */ 2660 odp->d_ino = objnum; 2661 odp->d_reclen = reclen; 2662 odp->d_namlen = strlen(zap.za_name); 2663 (void) strlcpy(odp->d_name, zap.za_name, odp->d_namlen + 1); 2664 odp->d_type = type; 2665 odp = (dirent64_t *)((intptr_t)odp + reclen); 2666 } 2667 outcount += reclen; 2668 2669 ASSERT(outcount <= bufsize); 2670 2671 /* Prefetch znode */ 2672 if (prefetch) 2673 dmu_prefetch(os, objnum, 0, 0); 2674 2675 skip_entry: 2676 /* 2677 * Move to the next entry, fill in the previous offset. 2678 */ 2679 if (offset > 2 || (offset == 2 && !zfs_show_ctldir(zp))) { 2680 zap_cursor_advance(&zc); 2681 offset = zap_cursor_serialize(&zc); 2682 } else { 2683 offset += 1; 2684 } 2685 2686 if (cooks != NULL) { 2687 *cooks++ = offset; 2688 ncooks--; 2689 KASSERT(ncooks >= 0, ("ncookies=%d", ncooks)); 2690 } 2691 } 2692 zp->z_zn_prefetch = B_FALSE; /* a lookup will re-enable pre-fetching */ 2693 2694 /* Subtract unused cookies */ 2695 if (ncookies != NULL) 2696 *ncookies -= ncooks; 2697 2698 if (uio->uio_segflg == UIO_SYSSPACE && uio->uio_iovcnt == 1) { 2699 iovp->iov_base += outcount; 2700 iovp->iov_len -= outcount; 2701 uio->uio_resid -= outcount; 2702 } else if (error = uiomove(outbuf, (long)outcount, UIO_READ, uio)) { 2703 /* 2704 * Reset the pointer. 2705 */ 2706 offset = uio->uio_loffset; 2707 } 2708 2709update: 2710 zap_cursor_fini(&zc); 2711 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2712 kmem_free(outbuf, bufsize); 2713 2714 if (error == ENOENT) 2715 error = 0; 2716 2717 ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 2718 2719 uio->uio_loffset = offset; 2720 ZFS_EXIT(zfsvfs); 2721 if (error != 0 && cookies != NULL) { 2722 free(*cookies, M_TEMP); 2723 *cookies = NULL; 2724 *ncookies = 0; 2725 } 2726 return (error); 2727} 2728 2729ulong_t zfs_fsync_sync_cnt = 4; 2730 2731static int 2732zfs_fsync(vnode_t *vp, int syncflag, cred_t *cr, caller_context_t *ct) 2733{ 2734 znode_t *zp = VTOZ(vp); 2735 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2736 2737 (void) tsd_set(zfs_fsyncer_key, (void *)zfs_fsync_sync_cnt); 2738 2739 if (zfsvfs->z_os->os_sync != ZFS_SYNC_DISABLED) { 2740 ZFS_ENTER(zfsvfs); 2741 ZFS_VERIFY_ZP(zp); 2742 zil_commit(zfsvfs->z_log, zp->z_id); 2743 ZFS_EXIT(zfsvfs); 2744 } 2745 return (0); 2746} 2747 2748 2749/* 2750 * Get the requested file attributes and place them in the provided 2751 * vattr structure. 2752 * 2753 * IN: vp - vnode of file. 2754 * vap - va_mask identifies requested attributes. 2755 * If AT_XVATTR set, then optional attrs are requested 2756 * flags - ATTR_NOACLCHECK (CIFS server context) 2757 * cr - credentials of caller. 2758 * ct - caller context 2759 * 2760 * OUT: vap - attribute values. 2761 * 2762 * RETURN: 0 (always succeeds). 2763 */ 2764/* ARGSUSED */ 2765static int 2766zfs_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 2767 caller_context_t *ct) 2768{ 2769 znode_t *zp = VTOZ(vp); 2770 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2771 int error = 0; 2772 uint32_t blksize; 2773 u_longlong_t nblocks; 2774 uint64_t links; 2775 uint64_t mtime[2], ctime[2], crtime[2], rdev; 2776 xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */ 2777 xoptattr_t *xoap = NULL; 2778 boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 2779 sa_bulk_attr_t bulk[4]; 2780 int count = 0; 2781 2782 ZFS_ENTER(zfsvfs); 2783 ZFS_VERIFY_ZP(zp); 2784 2785 zfs_fuid_map_ids(zp, cr, &vap->va_uid, &vap->va_gid); 2786 2787 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16); 2788 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16); 2789 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL, &crtime, 16); 2790 if (vp->v_type == VBLK || vp->v_type == VCHR) 2791 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zfsvfs), NULL, 2792 &rdev, 8); 2793 2794 if ((error = sa_bulk_lookup(zp->z_sa_hdl, bulk, count)) != 0) { 2795 ZFS_EXIT(zfsvfs); 2796 return (error); 2797 } 2798 2799 /* 2800 * If ACL is trivial don't bother looking for ACE_READ_ATTRIBUTES. 2801 * Also, if we are the owner don't bother, since owner should 2802 * always be allowed to read basic attributes of file. 2803 */ 2804 if (!(zp->z_pflags & ZFS_ACL_TRIVIAL) && 2805 (vap->va_uid != crgetuid(cr))) { 2806 if (error = zfs_zaccess(zp, ACE_READ_ATTRIBUTES, 0, 2807 skipaclchk, cr)) { 2808 ZFS_EXIT(zfsvfs); 2809 return (error); 2810 } 2811 } 2812 2813 /* 2814 * Return all attributes. It's cheaper to provide the answer 2815 * than to determine whether we were asked the question. 2816 */ 2817 2818 mutex_enter(&zp->z_lock); 2819 vap->va_type = IFTOVT(zp->z_mode); 2820 vap->va_mode = zp->z_mode & ~S_IFMT; 2821#ifdef sun 2822 vap->va_fsid = zp->z_zfsvfs->z_vfs->vfs_dev; 2823#else 2824 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 2825#endif 2826 vap->va_nodeid = zp->z_id; 2827 if ((vp->v_flag & VROOT) && zfs_show_ctldir(zp)) 2828 links = zp->z_links + 1; 2829 else 2830 links = zp->z_links; 2831 vap->va_nlink = MIN(links, LINK_MAX); /* nlink_t limit! */ 2832 vap->va_size = zp->z_size; 2833#ifdef sun 2834 vap->va_rdev = vp->v_rdev; 2835#else 2836 if (vp->v_type == VBLK || vp->v_type == VCHR) 2837 vap->va_rdev = zfs_cmpldev(rdev); 2838#endif 2839 vap->va_seq = zp->z_seq; 2840 vap->va_flags = 0; /* FreeBSD: Reset chflags(2) flags. */ 2841 2842 /* 2843 * Add in any requested optional attributes and the create time. 2844 * Also set the corresponding bits in the returned attribute bitmap. 2845 */ 2846 if ((xoap = xva_getxoptattr(xvap)) != NULL && zfsvfs->z_use_fuids) { 2847 if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) { 2848 xoap->xoa_archive = 2849 ((zp->z_pflags & ZFS_ARCHIVE) != 0); 2850 XVA_SET_RTN(xvap, XAT_ARCHIVE); 2851 } 2852 2853 if (XVA_ISSET_REQ(xvap, XAT_READONLY)) { 2854 xoap->xoa_readonly = 2855 ((zp->z_pflags & ZFS_READONLY) != 0); 2856 XVA_SET_RTN(xvap, XAT_READONLY); 2857 } 2858 2859 if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) { 2860 xoap->xoa_system = 2861 ((zp->z_pflags & ZFS_SYSTEM) != 0); 2862 XVA_SET_RTN(xvap, XAT_SYSTEM); 2863 } 2864 2865 if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) { 2866 xoap->xoa_hidden = 2867 ((zp->z_pflags & ZFS_HIDDEN) != 0); 2868 XVA_SET_RTN(xvap, XAT_HIDDEN); 2869 } 2870 2871 if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { 2872 xoap->xoa_nounlink = 2873 ((zp->z_pflags & ZFS_NOUNLINK) != 0); 2874 XVA_SET_RTN(xvap, XAT_NOUNLINK); 2875 } 2876 2877 if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { 2878 xoap->xoa_immutable = 2879 ((zp->z_pflags & ZFS_IMMUTABLE) != 0); 2880 XVA_SET_RTN(xvap, XAT_IMMUTABLE); 2881 } 2882 2883 if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { 2884 xoap->xoa_appendonly = 2885 ((zp->z_pflags & ZFS_APPENDONLY) != 0); 2886 XVA_SET_RTN(xvap, XAT_APPENDONLY); 2887 } 2888 2889 if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { 2890 xoap->xoa_nodump = 2891 ((zp->z_pflags & ZFS_NODUMP) != 0); 2892 XVA_SET_RTN(xvap, XAT_NODUMP); 2893 } 2894 2895 if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) { 2896 xoap->xoa_opaque = 2897 ((zp->z_pflags & ZFS_OPAQUE) != 0); 2898 XVA_SET_RTN(xvap, XAT_OPAQUE); 2899 } 2900 2901 if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { 2902 xoap->xoa_av_quarantined = 2903 ((zp->z_pflags & ZFS_AV_QUARANTINED) != 0); 2904 XVA_SET_RTN(xvap, XAT_AV_QUARANTINED); 2905 } 2906 2907 if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { 2908 xoap->xoa_av_modified = 2909 ((zp->z_pflags & ZFS_AV_MODIFIED) != 0); 2910 XVA_SET_RTN(xvap, XAT_AV_MODIFIED); 2911 } 2912 2913 if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) && 2914 vp->v_type == VREG) { 2915 zfs_sa_get_scanstamp(zp, xvap); 2916 } 2917 2918 if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) { 2919 uint64_t times[2]; 2920 2921 (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_CRTIME(zfsvfs), 2922 times, sizeof (times)); 2923 ZFS_TIME_DECODE(&xoap->xoa_createtime, times); 2924 XVA_SET_RTN(xvap, XAT_CREATETIME); 2925 } 2926 2927 if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) { 2928 xoap->xoa_reparse = ((zp->z_pflags & ZFS_REPARSE) != 0); 2929 XVA_SET_RTN(xvap, XAT_REPARSE); 2930 } 2931 if (XVA_ISSET_REQ(xvap, XAT_GEN)) { 2932 xoap->xoa_generation = zp->z_gen; 2933 XVA_SET_RTN(xvap, XAT_GEN); 2934 } 2935 2936 if (XVA_ISSET_REQ(xvap, XAT_OFFLINE)) { 2937 xoap->xoa_offline = 2938 ((zp->z_pflags & ZFS_OFFLINE) != 0); 2939 XVA_SET_RTN(xvap, XAT_OFFLINE); 2940 } 2941 2942 if (XVA_ISSET_REQ(xvap, XAT_SPARSE)) { 2943 xoap->xoa_sparse = 2944 ((zp->z_pflags & ZFS_SPARSE) != 0); 2945 XVA_SET_RTN(xvap, XAT_SPARSE); 2946 } 2947 } 2948 2949 ZFS_TIME_DECODE(&vap->va_atime, zp->z_atime); 2950 ZFS_TIME_DECODE(&vap->va_mtime, mtime); 2951 ZFS_TIME_DECODE(&vap->va_ctime, ctime); 2952 ZFS_TIME_DECODE(&vap->va_birthtime, crtime); 2953 2954 mutex_exit(&zp->z_lock); 2955 2956 sa_object_size(zp->z_sa_hdl, &blksize, &nblocks); 2957 vap->va_blksize = blksize; 2958 vap->va_bytes = nblocks << 9; /* nblocks * 512 */ 2959 2960 if (zp->z_blksz == 0) { 2961 /* 2962 * Block size hasn't been set; suggest maximal I/O transfers. 2963 */ 2964 vap->va_blksize = zfsvfs->z_max_blksz; 2965 } 2966 2967 ZFS_EXIT(zfsvfs); 2968 return (0); 2969} 2970 2971/* 2972 * Set the file attributes to the values contained in the 2973 * vattr structure. 2974 * 2975 * IN: vp - vnode of file to be modified. 2976 * vap - new attribute values. 2977 * If AT_XVATTR set, then optional attrs are being set 2978 * flags - ATTR_UTIME set if non-default time values provided. 2979 * - ATTR_NOACLCHECK (CIFS context only). 2980 * cr - credentials of caller. 2981 * ct - caller context 2982 * 2983 * RETURN: 0 on success, error code on failure. 2984 * 2985 * Timestamps: 2986 * vp - ctime updated, mtime updated if size changed. 2987 */ 2988/* ARGSUSED */ 2989static int 2990zfs_setattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 2991 caller_context_t *ct) 2992{ 2993 znode_t *zp = VTOZ(vp); 2994 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2995 zilog_t *zilog; 2996 dmu_tx_t *tx; 2997 vattr_t oldva; 2998 xvattr_t tmpxvattr; 2999 uint_t mask = vap->va_mask; 3000 uint_t saved_mask = 0; 3001 uint64_t saved_mode; 3002 int trim_mask = 0; 3003 uint64_t new_mode; 3004 uint64_t new_uid, new_gid; 3005 uint64_t xattr_obj; 3006 uint64_t mtime[2], ctime[2]; 3007 znode_t *attrzp; 3008 int need_policy = FALSE; 3009 int err, err2; 3010 zfs_fuid_info_t *fuidp = NULL; 3011 xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */ 3012 xoptattr_t *xoap; 3013 zfs_acl_t *aclp; 3014 boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 3015 boolean_t fuid_dirtied = B_FALSE; 3016 sa_bulk_attr_t bulk[7], xattr_bulk[7]; 3017 int count = 0, xattr_count = 0; 3018 3019 if (mask == 0) 3020 return (0); 3021 3022 if (mask & AT_NOSET) 3023 return (SET_ERROR(EINVAL)); 3024 3025 ZFS_ENTER(zfsvfs); 3026 ZFS_VERIFY_ZP(zp); 3027 3028 zilog = zfsvfs->z_log; 3029 3030 /* 3031 * Make sure that if we have ephemeral uid/gid or xvattr specified 3032 * that file system is at proper version level 3033 */ 3034 3035 if (zfsvfs->z_use_fuids == B_FALSE && 3036 (((mask & AT_UID) && IS_EPHEMERAL(vap->va_uid)) || 3037 ((mask & AT_GID) && IS_EPHEMERAL(vap->va_gid)) || 3038 (mask & AT_XVATTR))) { 3039 ZFS_EXIT(zfsvfs); 3040 return (SET_ERROR(EINVAL)); 3041 } 3042 3043 if (mask & AT_SIZE && vp->v_type == VDIR) { 3044 ZFS_EXIT(zfsvfs); 3045 return (SET_ERROR(EISDIR)); 3046 } 3047 3048 if (mask & AT_SIZE && vp->v_type != VREG && vp->v_type != VFIFO) { 3049 ZFS_EXIT(zfsvfs); 3050 return (SET_ERROR(EINVAL)); 3051 } 3052 3053 /* 3054 * If this is an xvattr_t, then get a pointer to the structure of 3055 * optional attributes. If this is NULL, then we have a vattr_t. 3056 */ 3057 xoap = xva_getxoptattr(xvap); 3058 3059 xva_init(&tmpxvattr); 3060 3061 /* 3062 * Immutable files can only alter immutable bit and atime 3063 */ 3064 if ((zp->z_pflags & ZFS_IMMUTABLE) && 3065 ((mask & (AT_SIZE|AT_UID|AT_GID|AT_MTIME|AT_MODE)) || 3066 ((mask & AT_XVATTR) && XVA_ISSET_REQ(xvap, XAT_CREATETIME)))) { 3067 ZFS_EXIT(zfsvfs); 3068 return (SET_ERROR(EPERM)); 3069 } 3070 3071 if ((mask & AT_SIZE) && (zp->z_pflags & ZFS_READONLY)) { 3072 ZFS_EXIT(zfsvfs); 3073 return (SET_ERROR(EPERM)); 3074 } 3075 3076 /* 3077 * Verify timestamps doesn't overflow 32 bits. 3078 * ZFS can handle large timestamps, but 32bit syscalls can't 3079 * handle times greater than 2039. This check should be removed 3080 * once large timestamps are fully supported. 3081 */ 3082 if (mask & (AT_ATIME | AT_MTIME)) { 3083 if (((mask & AT_ATIME) && TIMESPEC_OVERFLOW(&vap->va_atime)) || 3084 ((mask & AT_MTIME) && TIMESPEC_OVERFLOW(&vap->va_mtime))) { 3085 ZFS_EXIT(zfsvfs); 3086 return (SET_ERROR(EOVERFLOW)); 3087 } 3088 } 3089 3090top: 3091 attrzp = NULL; 3092 aclp = NULL; 3093 3094 /* Can this be moved to before the top label? */ 3095 if (zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) { 3096 ZFS_EXIT(zfsvfs); 3097 return (SET_ERROR(EROFS)); 3098 } 3099 3100 /* 3101 * First validate permissions 3102 */ 3103 3104 if (mask & AT_SIZE) { 3105 /* 3106 * XXX - Note, we are not providing any open 3107 * mode flags here (like FNDELAY), so we may 3108 * block if there are locks present... this 3109 * should be addressed in openat(). 3110 */ 3111 /* XXX - would it be OK to generate a log record here? */ 3112 err = zfs_freesp(zp, vap->va_size, 0, 0, FALSE); 3113 if (err) { 3114 ZFS_EXIT(zfsvfs); 3115 return (err); 3116 } 3117 } 3118 3119 if (mask & (AT_ATIME|AT_MTIME) || 3120 ((mask & AT_XVATTR) && (XVA_ISSET_REQ(xvap, XAT_HIDDEN) || 3121 XVA_ISSET_REQ(xvap, XAT_READONLY) || 3122 XVA_ISSET_REQ(xvap, XAT_ARCHIVE) || 3123 XVA_ISSET_REQ(xvap, XAT_OFFLINE) || 3124 XVA_ISSET_REQ(xvap, XAT_SPARSE) || 3125 XVA_ISSET_REQ(xvap, XAT_CREATETIME) || 3126 XVA_ISSET_REQ(xvap, XAT_SYSTEM)))) { 3127 need_policy = zfs_zaccess(zp, ACE_WRITE_ATTRIBUTES, 0, 3128 skipaclchk, cr); 3129 } 3130 3131 if (mask & (AT_UID|AT_GID)) { 3132 int idmask = (mask & (AT_UID|AT_GID)); 3133 int take_owner; 3134 int take_group; 3135 3136 /* 3137 * NOTE: even if a new mode is being set, 3138 * we may clear S_ISUID/S_ISGID bits. 3139 */ 3140 3141 if (!(mask & AT_MODE)) 3142 vap->va_mode = zp->z_mode; 3143 3144 /* 3145 * Take ownership or chgrp to group we are a member of 3146 */ 3147 3148 take_owner = (mask & AT_UID) && (vap->va_uid == crgetuid(cr)); 3149 take_group = (mask & AT_GID) && 3150 zfs_groupmember(zfsvfs, vap->va_gid, cr); 3151 3152 /* 3153 * If both AT_UID and AT_GID are set then take_owner and 3154 * take_group must both be set in order to allow taking 3155 * ownership. 3156 * 3157 * Otherwise, send the check through secpolicy_vnode_setattr() 3158 * 3159 */ 3160 3161 if (((idmask == (AT_UID|AT_GID)) && take_owner && take_group) || 3162 ((idmask == AT_UID) && take_owner) || 3163 ((idmask == AT_GID) && take_group)) { 3164 if (zfs_zaccess(zp, ACE_WRITE_OWNER, 0, 3165 skipaclchk, cr) == 0) { 3166 /* 3167 * Remove setuid/setgid for non-privileged users 3168 */ 3169 secpolicy_setid_clear(vap, vp, cr); 3170 trim_mask = (mask & (AT_UID|AT_GID)); 3171 } else { 3172 need_policy = TRUE; 3173 } 3174 } else { 3175 need_policy = TRUE; 3176 } 3177 } 3178 3179 mutex_enter(&zp->z_lock); 3180 oldva.va_mode = zp->z_mode; 3181 zfs_fuid_map_ids(zp, cr, &oldva.va_uid, &oldva.va_gid); 3182 if (mask & AT_XVATTR) { 3183 /* 3184 * Update xvattr mask to include only those attributes 3185 * that are actually changing. 3186 * 3187 * the bits will be restored prior to actually setting 3188 * the attributes so the caller thinks they were set. 3189 */ 3190 if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { 3191 if (xoap->xoa_appendonly != 3192 ((zp->z_pflags & ZFS_APPENDONLY) != 0)) { 3193 need_policy = TRUE; 3194 } else { 3195 XVA_CLR_REQ(xvap, XAT_APPENDONLY); 3196 XVA_SET_REQ(&tmpxvattr, XAT_APPENDONLY); 3197 } 3198 } 3199 3200 if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { 3201 if (xoap->xoa_nounlink != 3202 ((zp->z_pflags & ZFS_NOUNLINK) != 0)) { 3203 need_policy = TRUE; 3204 } else { 3205 XVA_CLR_REQ(xvap, XAT_NOUNLINK); 3206 XVA_SET_REQ(&tmpxvattr, XAT_NOUNLINK); 3207 } 3208 } 3209 3210 if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { 3211 if (xoap->xoa_immutable != 3212 ((zp->z_pflags & ZFS_IMMUTABLE) != 0)) { 3213 need_policy = TRUE; 3214 } else { 3215 XVA_CLR_REQ(xvap, XAT_IMMUTABLE); 3216 XVA_SET_REQ(&tmpxvattr, XAT_IMMUTABLE); 3217 } 3218 } 3219 3220 if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { 3221 if (xoap->xoa_nodump != 3222 ((zp->z_pflags & ZFS_NODUMP) != 0)) { 3223 need_policy = TRUE; 3224 } else { 3225 XVA_CLR_REQ(xvap, XAT_NODUMP); 3226 XVA_SET_REQ(&tmpxvattr, XAT_NODUMP); 3227 } 3228 } 3229 3230 if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { 3231 if (xoap->xoa_av_modified != 3232 ((zp->z_pflags & ZFS_AV_MODIFIED) != 0)) { 3233 need_policy = TRUE; 3234 } else { 3235 XVA_CLR_REQ(xvap, XAT_AV_MODIFIED); 3236 XVA_SET_REQ(&tmpxvattr, XAT_AV_MODIFIED); 3237 } 3238 } 3239 3240 if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { 3241 if ((vp->v_type != VREG && 3242 xoap->xoa_av_quarantined) || 3243 xoap->xoa_av_quarantined != 3244 ((zp->z_pflags & ZFS_AV_QUARANTINED) != 0)) { 3245 need_policy = TRUE; 3246 } else { 3247 XVA_CLR_REQ(xvap, XAT_AV_QUARANTINED); 3248 XVA_SET_REQ(&tmpxvattr, XAT_AV_QUARANTINED); 3249 } 3250 } 3251 3252 if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) { 3253 mutex_exit(&zp->z_lock); 3254 ZFS_EXIT(zfsvfs); 3255 return (SET_ERROR(EPERM)); 3256 } 3257 3258 if (need_policy == FALSE && 3259 (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) || 3260 XVA_ISSET_REQ(xvap, XAT_OPAQUE))) { 3261 need_policy = TRUE; 3262 } 3263 } 3264 3265 mutex_exit(&zp->z_lock); 3266 3267 if (mask & AT_MODE) { 3268 if (zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr) == 0) { 3269 err = secpolicy_setid_setsticky_clear(vp, vap, 3270 &oldva, cr); 3271 if (err) { 3272 ZFS_EXIT(zfsvfs); 3273 return (err); 3274 } 3275 trim_mask |= AT_MODE; 3276 } else { 3277 need_policy = TRUE; 3278 } 3279 } 3280 3281 if (need_policy) { 3282 /* 3283 * If trim_mask is set then take ownership 3284 * has been granted or write_acl is present and user 3285 * has the ability to modify mode. In that case remove 3286 * UID|GID and or MODE from mask so that 3287 * secpolicy_vnode_setattr() doesn't revoke it. 3288 */ 3289 3290 if (trim_mask) { 3291 saved_mask = vap->va_mask; 3292 vap->va_mask &= ~trim_mask; 3293 if (trim_mask & AT_MODE) { 3294 /* 3295 * Save the mode, as secpolicy_vnode_setattr() 3296 * will overwrite it with ova.va_mode. 3297 */ 3298 saved_mode = vap->va_mode; 3299 } 3300 } 3301 err = secpolicy_vnode_setattr(cr, vp, vap, &oldva, flags, 3302 (int (*)(void *, int, cred_t *))zfs_zaccess_unix, zp); 3303 if (err) { 3304 ZFS_EXIT(zfsvfs); 3305 return (err); 3306 } 3307 3308 if (trim_mask) { 3309 vap->va_mask |= saved_mask; 3310 if (trim_mask & AT_MODE) { 3311 /* 3312 * Recover the mode after 3313 * secpolicy_vnode_setattr(). 3314 */ 3315 vap->va_mode = saved_mode; 3316 } 3317 } 3318 } 3319 3320 /* 3321 * secpolicy_vnode_setattr, or take ownership may have 3322 * changed va_mask 3323 */ 3324 mask = vap->va_mask; 3325 3326 if ((mask & (AT_UID | AT_GID))) { 3327 err = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs), 3328 &xattr_obj, sizeof (xattr_obj)); 3329 3330 if (err == 0 && xattr_obj) { 3331 err = zfs_zget(zp->z_zfsvfs, xattr_obj, &attrzp); 3332 if (err) 3333 goto out2; 3334 } 3335 if (mask & AT_UID) { 3336 new_uid = zfs_fuid_create(zfsvfs, 3337 (uint64_t)vap->va_uid, cr, ZFS_OWNER, &fuidp); 3338 if (new_uid != zp->z_uid && 3339 zfs_fuid_overquota(zfsvfs, B_FALSE, new_uid)) { 3340 if (attrzp) 3341 VN_RELE(ZTOV(attrzp)); 3342 err = SET_ERROR(EDQUOT); 3343 goto out2; 3344 } 3345 } 3346 3347 if (mask & AT_GID) { 3348 new_gid = zfs_fuid_create(zfsvfs, (uint64_t)vap->va_gid, 3349 cr, ZFS_GROUP, &fuidp); 3350 if (new_gid != zp->z_gid && 3351 zfs_fuid_overquota(zfsvfs, B_TRUE, new_gid)) { 3352 if (attrzp) 3353 VN_RELE(ZTOV(attrzp)); 3354 err = SET_ERROR(EDQUOT); 3355 goto out2; 3356 } 3357 } 3358 } 3359 tx = dmu_tx_create(zfsvfs->z_os); 3360 3361 if (mask & AT_MODE) { 3362 uint64_t pmode = zp->z_mode; 3363 uint64_t acl_obj; 3364 new_mode = (pmode & S_IFMT) | (vap->va_mode & ~S_IFMT); 3365 3366 if (zp->z_zfsvfs->z_acl_mode == ZFS_ACL_RESTRICTED && 3367 !(zp->z_pflags & ZFS_ACL_TRIVIAL)) { 3368 err = SET_ERROR(EPERM); 3369 goto out; 3370 } 3371 3372 if (err = zfs_acl_chmod_setattr(zp, &aclp, new_mode)) 3373 goto out; 3374 3375 mutex_enter(&zp->z_lock); 3376 if (!zp->z_is_sa && ((acl_obj = zfs_external_acl(zp)) != 0)) { 3377 /* 3378 * Are we upgrading ACL from old V0 format 3379 * to V1 format? 3380 */ 3381 if (zfsvfs->z_version >= ZPL_VERSION_FUID && 3382 zfs_znode_acl_version(zp) == 3383 ZFS_ACL_VERSION_INITIAL) { 3384 dmu_tx_hold_free(tx, acl_obj, 0, 3385 DMU_OBJECT_END); 3386 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 3387 0, aclp->z_acl_bytes); 3388 } else { 3389 dmu_tx_hold_write(tx, acl_obj, 0, 3390 aclp->z_acl_bytes); 3391 } 3392 } else if (!zp->z_is_sa && aclp->z_acl_bytes > ZFS_ACE_SPACE) { 3393 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 3394 0, aclp->z_acl_bytes); 3395 } 3396 mutex_exit(&zp->z_lock); 3397 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); 3398 } else { 3399 if ((mask & AT_XVATTR) && 3400 XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) 3401 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); 3402 else 3403 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); 3404 } 3405 3406 if (attrzp) { 3407 dmu_tx_hold_sa(tx, attrzp->z_sa_hdl, B_FALSE); 3408 } 3409 3410 fuid_dirtied = zfsvfs->z_fuid_dirty; 3411 if (fuid_dirtied) 3412 zfs_fuid_txhold(zfsvfs, tx); 3413 3414 zfs_sa_upgrade_txholds(tx, zp); 3415 3416 err = dmu_tx_assign(tx, TXG_WAIT); 3417 if (err) 3418 goto out; 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 } 4526 tx = dmu_tx_create(zfsvfs->z_os); 4527 dmu_tx_hold_write(tx, zp->z_id, off, len); 4528 4529 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); 4530 zfs_sa_upgrade_txholds(tx, zp); 4531 err = dmu_tx_assign(tx, TXG_WAIT); 4532 if (err != 0) { 4533 dmu_tx_abort(tx); 4534 goto out; 4535 } 4536 4537 if (zp->z_blksz <= PAGESIZE) { 4538 caddr_t va = zfs_map_page(pp, S_READ); 4539 ASSERT3U(len, <=, PAGESIZE); 4540 dmu_write(zfsvfs->z_os, zp->z_id, off, len, va, tx); 4541 zfs_unmap_page(pp, va); 4542 } else { 4543 err = dmu_write_pages(zfsvfs->z_os, zp->z_id, off, len, pp, tx); 4544 } 4545 4546 if (err == 0) { 4547 uint64_t mtime[2], ctime[2]; 4548 sa_bulk_attr_t bulk[3]; 4549 int count = 0; 4550 4551 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, 4552 &mtime, 16); 4553 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, 4554 &ctime, 16); 4555 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL, 4556 &zp->z_pflags, 8); 4557 zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime, 4558 B_TRUE); 4559 zfs_log_write(zfsvfs->z_log, tx, TX_WRITE, zp, off, len, 0); 4560 } 4561 dmu_tx_commit(tx); 4562 4563out: 4564 pvn_write_done(pp, (err ? B_ERROR : 0) | flags); 4565 if (offp) 4566 *offp = off; 4567 if (lenp) 4568 *lenp = len; 4569 4570 return (err); 4571} 4572 4573/* 4574 * Copy the portion of the file indicated from pages into the file. 4575 * The pages are stored in a page list attached to the files vnode. 4576 * 4577 * IN: vp - vnode of file to push page data to. 4578 * off - position in file to put data. 4579 * len - amount of data to write. 4580 * flags - flags to control the operation. 4581 * cr - credentials of caller. 4582 * ct - caller context. 4583 * 4584 * RETURN: 0 on success, error code on failure. 4585 * 4586 * Timestamps: 4587 * vp - ctime|mtime updated 4588 */ 4589/*ARGSUSED*/ 4590static int 4591zfs_putpage(vnode_t *vp, offset_t off, size_t len, int flags, cred_t *cr, 4592 caller_context_t *ct) 4593{ 4594 znode_t *zp = VTOZ(vp); 4595 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4596 page_t *pp; 4597 size_t io_len; 4598 u_offset_t io_off; 4599 uint_t blksz; 4600 rl_t *rl; 4601 int error = 0; 4602 4603 ZFS_ENTER(zfsvfs); 4604 ZFS_VERIFY_ZP(zp); 4605 4606 /* 4607 * Align this request to the file block size in case we kluster. 4608 * XXX - this can result in pretty aggresive locking, which can 4609 * impact simultanious read/write access. One option might be 4610 * to break up long requests (len == 0) into block-by-block 4611 * operations to get narrower locking. 4612 */ 4613 blksz = zp->z_blksz; 4614 if (ISP2(blksz)) 4615 io_off = P2ALIGN_TYPED(off, blksz, u_offset_t); 4616 else 4617 io_off = 0; 4618 if (len > 0 && ISP2(blksz)) 4619 io_len = P2ROUNDUP_TYPED(len + (off - io_off), blksz, size_t); 4620 else 4621 io_len = 0; 4622 4623 if (io_len == 0) { 4624 /* 4625 * Search the entire vp list for pages >= io_off. 4626 */ 4627 rl = zfs_range_lock(zp, io_off, UINT64_MAX, RL_WRITER); 4628 error = pvn_vplist_dirty(vp, io_off, zfs_putapage, flags, cr); 4629 goto out; 4630 } 4631 rl = zfs_range_lock(zp, io_off, io_len, RL_WRITER); 4632 4633 if (off > zp->z_size) { 4634 /* past end of file */ 4635 zfs_range_unlock(rl); 4636 ZFS_EXIT(zfsvfs); 4637 return (0); 4638 } 4639 4640 len = MIN(io_len, P2ROUNDUP(zp->z_size, PAGESIZE) - io_off); 4641 4642 for (off = io_off; io_off < off + len; io_off += io_len) { 4643 if ((flags & B_INVAL) || ((flags & B_ASYNC) == 0)) { 4644 pp = page_lookup(vp, io_off, 4645 (flags & (B_INVAL | B_FREE)) ? SE_EXCL : SE_SHARED); 4646 } else { 4647 pp = page_lookup_nowait(vp, io_off, 4648 (flags & B_FREE) ? SE_EXCL : SE_SHARED); 4649 } 4650 4651 if (pp != NULL && pvn_getdirty(pp, flags)) { 4652 int err; 4653 4654 /* 4655 * Found a dirty page to push 4656 */ 4657 err = zfs_putapage(vp, pp, &io_off, &io_len, flags, cr); 4658 if (err) 4659 error = err; 4660 } else { 4661 io_len = PAGESIZE; 4662 } 4663 } 4664out: 4665 zfs_range_unlock(rl); 4666 if ((flags & B_ASYNC) == 0 || zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 4667 zil_commit(zfsvfs->z_log, zp->z_id); 4668 ZFS_EXIT(zfsvfs); 4669 return (error); 4670} 4671#endif /* sun */ 4672 4673/*ARGSUSED*/ 4674void 4675zfs_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct) 4676{ 4677 znode_t *zp = VTOZ(vp); 4678 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4679 int error; 4680 4681 rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_READER); 4682 if (zp->z_sa_hdl == NULL) { 4683 /* 4684 * The fs has been unmounted, or we did a 4685 * suspend/resume and this file no longer exists. 4686 */ 4687 rw_exit(&zfsvfs->z_teardown_inactive_lock); 4688 vrecycle(vp); 4689 return; 4690 } 4691 4692 mutex_enter(&zp->z_lock); 4693 if (zp->z_unlinked) { 4694 /* 4695 * Fast path to recycle a vnode of a removed file. 4696 */ 4697 mutex_exit(&zp->z_lock); 4698 rw_exit(&zfsvfs->z_teardown_inactive_lock); 4699 vrecycle(vp); 4700 return; 4701 } 4702 mutex_exit(&zp->z_lock); 4703 4704 if (zp->z_atime_dirty && zp->z_unlinked == 0) { 4705 dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os); 4706 4707 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); 4708 zfs_sa_upgrade_txholds(tx, zp); 4709 error = dmu_tx_assign(tx, TXG_WAIT); 4710 if (error) { 4711 dmu_tx_abort(tx); 4712 } else { 4713 mutex_enter(&zp->z_lock); 4714 (void) sa_update(zp->z_sa_hdl, SA_ZPL_ATIME(zfsvfs), 4715 (void *)&zp->z_atime, sizeof (zp->z_atime), tx); 4716 zp->z_atime_dirty = 0; 4717 mutex_exit(&zp->z_lock); 4718 dmu_tx_commit(tx); 4719 } 4720 } 4721 rw_exit(&zfsvfs->z_teardown_inactive_lock); 4722} 4723 4724#ifdef sun 4725/* 4726 * Bounds-check the seek operation. 4727 * 4728 * IN: vp - vnode seeking within 4729 * ooff - old file offset 4730 * noffp - pointer to new file offset 4731 * ct - caller context 4732 * 4733 * RETURN: 0 on success, EINVAL if new offset invalid. 4734 */ 4735/* ARGSUSED */ 4736static int 4737zfs_seek(vnode_t *vp, offset_t ooff, offset_t *noffp, 4738 caller_context_t *ct) 4739{ 4740 if (vp->v_type == VDIR) 4741 return (0); 4742 return ((*noffp < 0 || *noffp > MAXOFFSET_T) ? EINVAL : 0); 4743} 4744 4745/* 4746 * Pre-filter the generic locking function to trap attempts to place 4747 * a mandatory lock on a memory mapped file. 4748 */ 4749static int 4750zfs_frlock(vnode_t *vp, int cmd, flock64_t *bfp, int flag, offset_t offset, 4751 flk_callback_t *flk_cbp, cred_t *cr, caller_context_t *ct) 4752{ 4753 znode_t *zp = VTOZ(vp); 4754 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4755 4756 ZFS_ENTER(zfsvfs); 4757 ZFS_VERIFY_ZP(zp); 4758 4759 /* 4760 * We are following the UFS semantics with respect to mapcnt 4761 * here: If we see that the file is mapped already, then we will 4762 * return an error, but we don't worry about races between this 4763 * function and zfs_map(). 4764 */ 4765 if (zp->z_mapcnt > 0 && MANDMODE(zp->z_mode)) { 4766 ZFS_EXIT(zfsvfs); 4767 return (SET_ERROR(EAGAIN)); 4768 } 4769 ZFS_EXIT(zfsvfs); 4770 return (fs_frlock(vp, cmd, bfp, flag, offset, flk_cbp, cr, ct)); 4771} 4772 4773/* 4774 * If we can't find a page in the cache, we will create a new page 4775 * and fill it with file data. For efficiency, we may try to fill 4776 * multiple pages at once (klustering) to fill up the supplied page 4777 * list. Note that the pages to be filled are held with an exclusive 4778 * lock to prevent access by other threads while they are being filled. 4779 */ 4780static int 4781zfs_fillpage(vnode_t *vp, u_offset_t off, struct seg *seg, 4782 caddr_t addr, page_t *pl[], size_t plsz, enum seg_rw rw) 4783{ 4784 znode_t *zp = VTOZ(vp); 4785 page_t *pp, *cur_pp; 4786 objset_t *os = zp->z_zfsvfs->z_os; 4787 u_offset_t io_off, total; 4788 size_t io_len; 4789 int err; 4790 4791 if (plsz == PAGESIZE || zp->z_blksz <= PAGESIZE) { 4792 /* 4793 * We only have a single page, don't bother klustering 4794 */ 4795 io_off = off; 4796 io_len = PAGESIZE; 4797 pp = page_create_va(vp, io_off, io_len, 4798 PG_EXCL | PG_WAIT, seg, addr); 4799 } else { 4800 /* 4801 * Try to find enough pages to fill the page list 4802 */ 4803 pp = pvn_read_kluster(vp, off, seg, addr, &io_off, 4804 &io_len, off, plsz, 0); 4805 } 4806 if (pp == NULL) { 4807 /* 4808 * The page already exists, nothing to do here. 4809 */ 4810 *pl = NULL; 4811 return (0); 4812 } 4813 4814 /* 4815 * Fill the pages in the kluster. 4816 */ 4817 cur_pp = pp; 4818 for (total = io_off + io_len; io_off < total; io_off += PAGESIZE) { 4819 caddr_t va; 4820 4821 ASSERT3U(io_off, ==, cur_pp->p_offset); 4822 va = zfs_map_page(cur_pp, S_WRITE); 4823 err = dmu_read(os, zp->z_id, io_off, PAGESIZE, va, 4824 DMU_READ_PREFETCH); 4825 zfs_unmap_page(cur_pp, va); 4826 if (err) { 4827 /* On error, toss the entire kluster */ 4828 pvn_read_done(pp, B_ERROR); 4829 /* convert checksum errors into IO errors */ 4830 if (err == ECKSUM) 4831 err = SET_ERROR(EIO); 4832 return (err); 4833 } 4834 cur_pp = cur_pp->p_next; 4835 } 4836 4837 /* 4838 * Fill in the page list array from the kluster starting 4839 * from the desired offset `off'. 4840 * NOTE: the page list will always be null terminated. 4841 */ 4842 pvn_plist_init(pp, pl, plsz, off, io_len, rw); 4843 ASSERT(pl == NULL || (*pl)->p_offset == off); 4844 4845 return (0); 4846} 4847 4848/* 4849 * Return pointers to the pages for the file region [off, off + len] 4850 * in the pl array. If plsz is greater than len, this function may 4851 * also return page pointers from after the specified region 4852 * (i.e. the region [off, off + plsz]). These additional pages are 4853 * only returned if they are already in the cache, or were created as 4854 * part of a klustered read. 4855 * 4856 * IN: vp - vnode of file to get data from. 4857 * off - position in file to get data from. 4858 * len - amount of data to retrieve. 4859 * plsz - length of provided page list. 4860 * seg - segment to obtain pages for. 4861 * addr - virtual address of fault. 4862 * rw - mode of created pages. 4863 * cr - credentials of caller. 4864 * ct - caller context. 4865 * 4866 * OUT: protp - protection mode of created pages. 4867 * pl - list of pages created. 4868 * 4869 * RETURN: 0 on success, error code on failure. 4870 * 4871 * Timestamps: 4872 * vp - atime updated 4873 */ 4874/* ARGSUSED */ 4875static int 4876zfs_getpage(vnode_t *vp, offset_t off, size_t len, uint_t *protp, 4877 page_t *pl[], size_t plsz, struct seg *seg, caddr_t addr, 4878 enum seg_rw rw, cred_t *cr, caller_context_t *ct) 4879{ 4880 znode_t *zp = VTOZ(vp); 4881 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4882 page_t **pl0 = pl; 4883 int err = 0; 4884 4885 /* we do our own caching, faultahead is unnecessary */ 4886 if (pl == NULL) 4887 return (0); 4888 else if (len > plsz) 4889 len = plsz; 4890 else 4891 len = P2ROUNDUP(len, PAGESIZE); 4892 ASSERT(plsz >= len); 4893 4894 ZFS_ENTER(zfsvfs); 4895 ZFS_VERIFY_ZP(zp); 4896 4897 if (protp) 4898 *protp = PROT_ALL; 4899 4900 /* 4901 * Loop through the requested range [off, off + len) looking 4902 * for pages. If we don't find a page, we will need to create 4903 * a new page and fill it with data from the file. 4904 */ 4905 while (len > 0) { 4906 if (*pl = page_lookup(vp, off, SE_SHARED)) 4907 *(pl+1) = NULL; 4908 else if (err = zfs_fillpage(vp, off, seg, addr, pl, plsz, rw)) 4909 goto out; 4910 while (*pl) { 4911 ASSERT3U((*pl)->p_offset, ==, off); 4912 off += PAGESIZE; 4913 addr += PAGESIZE; 4914 if (len > 0) { 4915 ASSERT3U(len, >=, PAGESIZE); 4916 len -= PAGESIZE; 4917 } 4918 ASSERT3U(plsz, >=, PAGESIZE); 4919 plsz -= PAGESIZE; 4920 pl++; 4921 } 4922 } 4923 4924 /* 4925 * Fill out the page array with any pages already in the cache. 4926 */ 4927 while (plsz > 0 && 4928 (*pl++ = page_lookup_nowait(vp, off, SE_SHARED))) { 4929 off += PAGESIZE; 4930 plsz -= PAGESIZE; 4931 } 4932out: 4933 if (err) { 4934 /* 4935 * Release any pages we have previously locked. 4936 */ 4937 while (pl > pl0) 4938 page_unlock(*--pl); 4939 } else { 4940 ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 4941 } 4942 4943 *pl = NULL; 4944 4945 ZFS_EXIT(zfsvfs); 4946 return (err); 4947} 4948 4949/* 4950 * Request a memory map for a section of a file. This code interacts 4951 * with common code and the VM system as follows: 4952 * 4953 * - common code calls mmap(), which ends up in smmap_common() 4954 * - this calls VOP_MAP(), which takes you into (say) zfs 4955 * - zfs_map() calls as_map(), passing segvn_create() as the callback 4956 * - segvn_create() creates the new segment and calls VOP_ADDMAP() 4957 * - zfs_addmap() updates z_mapcnt 4958 */ 4959/*ARGSUSED*/ 4960static int 4961zfs_map(vnode_t *vp, offset_t off, struct as *as, caddr_t *addrp, 4962 size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr, 4963 caller_context_t *ct) 4964{ 4965 znode_t *zp = VTOZ(vp); 4966 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4967 segvn_crargs_t vn_a; 4968 int error; 4969 4970 ZFS_ENTER(zfsvfs); 4971 ZFS_VERIFY_ZP(zp); 4972 4973 if ((prot & PROT_WRITE) && (zp->z_pflags & 4974 (ZFS_IMMUTABLE | ZFS_READONLY | ZFS_APPENDONLY))) { 4975 ZFS_EXIT(zfsvfs); 4976 return (SET_ERROR(EPERM)); 4977 } 4978 4979 if ((prot & (PROT_READ | PROT_EXEC)) && 4980 (zp->z_pflags & ZFS_AV_QUARANTINED)) { 4981 ZFS_EXIT(zfsvfs); 4982 return (SET_ERROR(EACCES)); 4983 } 4984 4985 if (vp->v_flag & VNOMAP) { 4986 ZFS_EXIT(zfsvfs); 4987 return (SET_ERROR(ENOSYS)); 4988 } 4989 4990 if (off < 0 || len > MAXOFFSET_T - off) { 4991 ZFS_EXIT(zfsvfs); 4992 return (SET_ERROR(ENXIO)); 4993 } 4994 4995 if (vp->v_type != VREG) { 4996 ZFS_EXIT(zfsvfs); 4997 return (SET_ERROR(ENODEV)); 4998 } 4999 5000 /* 5001 * If file is locked, disallow mapping. 5002 */ 5003 if (MANDMODE(zp->z_mode) && vn_has_flocks(vp)) { 5004 ZFS_EXIT(zfsvfs); 5005 return (SET_ERROR(EAGAIN)); 5006 } 5007 5008 as_rangelock(as); 5009 error = choose_addr(as, addrp, len, off, ADDR_VACALIGN, flags); 5010 if (error != 0) { 5011 as_rangeunlock(as); 5012 ZFS_EXIT(zfsvfs); 5013 return (error); 5014 } 5015 5016 vn_a.vp = vp; 5017 vn_a.offset = (u_offset_t)off; 5018 vn_a.type = flags & MAP_TYPE; 5019 vn_a.prot = prot; 5020 vn_a.maxprot = maxprot; 5021 vn_a.cred = cr; 5022 vn_a.amp = NULL; 5023 vn_a.flags = flags & ~MAP_TYPE; 5024 vn_a.szc = 0; 5025 vn_a.lgrp_mem_policy_flags = 0; 5026 5027 error = as_map(as, *addrp, len, segvn_create, &vn_a); 5028 5029 as_rangeunlock(as); 5030 ZFS_EXIT(zfsvfs); 5031 return (error); 5032} 5033 5034/* ARGSUSED */ 5035static int 5036zfs_addmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 5037 size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr, 5038 caller_context_t *ct) 5039{ 5040 uint64_t pages = btopr(len); 5041 5042 atomic_add_64(&VTOZ(vp)->z_mapcnt, pages); 5043 return (0); 5044} 5045 5046/* 5047 * The reason we push dirty pages as part of zfs_delmap() is so that we get a 5048 * more accurate mtime for the associated file. Since we don't have a way of 5049 * detecting when the data was actually modified, we have to resort to 5050 * heuristics. If an explicit msync() is done, then we mark the mtime when the 5051 * last page is pushed. The problem occurs when the msync() call is omitted, 5052 * which by far the most common case: 5053 * 5054 * open() 5055 * mmap() 5056 * <modify memory> 5057 * munmap() 5058 * close() 5059 * <time lapse> 5060 * putpage() via fsflush 5061 * 5062 * If we wait until fsflush to come along, we can have a modification time that 5063 * is some arbitrary point in the future. In order to prevent this in the 5064 * common case, we flush pages whenever a (MAP_SHARED, PROT_WRITE) mapping is 5065 * torn down. 5066 */ 5067/* ARGSUSED */ 5068static int 5069zfs_delmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 5070 size_t len, uint_t prot, uint_t maxprot, uint_t flags, cred_t *cr, 5071 caller_context_t *ct) 5072{ 5073 uint64_t pages = btopr(len); 5074 5075 ASSERT3U(VTOZ(vp)->z_mapcnt, >=, pages); 5076 atomic_add_64(&VTOZ(vp)->z_mapcnt, -pages); 5077 5078 if ((flags & MAP_SHARED) && (prot & PROT_WRITE) && 5079 vn_has_cached_data(vp)) 5080 (void) VOP_PUTPAGE(vp, off, len, B_ASYNC, cr, ct); 5081 5082 return (0); 5083} 5084 5085/* 5086 * Free or allocate space in a file. Currently, this function only 5087 * supports the `F_FREESP' command. However, this command is somewhat 5088 * misnamed, as its functionality includes the ability to allocate as 5089 * well as free space. 5090 * 5091 * IN: vp - vnode of file to free data in. 5092 * cmd - action to take (only F_FREESP supported). 5093 * bfp - section of file to free/alloc. 5094 * flag - current file open mode flags. 5095 * offset - current file offset. 5096 * cr - credentials of caller [UNUSED]. 5097 * ct - caller context. 5098 * 5099 * RETURN: 0 on success, error code on failure. 5100 * 5101 * Timestamps: 5102 * vp - ctime|mtime updated 5103 */ 5104/* ARGSUSED */ 5105static int 5106zfs_space(vnode_t *vp, int cmd, flock64_t *bfp, int flag, 5107 offset_t offset, cred_t *cr, caller_context_t *ct) 5108{ 5109 znode_t *zp = VTOZ(vp); 5110 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 5111 uint64_t off, len; 5112 int error; 5113 5114 ZFS_ENTER(zfsvfs); 5115 ZFS_VERIFY_ZP(zp); 5116 5117 if (cmd != F_FREESP) { 5118 ZFS_EXIT(zfsvfs); 5119 return (SET_ERROR(EINVAL)); 5120 } 5121 5122 if (error = convoff(vp, bfp, 0, offset)) { 5123 ZFS_EXIT(zfsvfs); 5124 return (error); 5125 } 5126 5127 if (bfp->l_len < 0) { 5128 ZFS_EXIT(zfsvfs); 5129 return (SET_ERROR(EINVAL)); 5130 } 5131 5132 off = bfp->l_start; 5133 len = bfp->l_len; /* 0 means from off to end of file */ 5134 5135 error = zfs_freesp(zp, off, len, flag, TRUE); 5136 5137 ZFS_EXIT(zfsvfs); 5138 return (error); 5139} 5140#endif /* sun */ 5141 5142CTASSERT(sizeof(struct zfid_short) <= sizeof(struct fid)); 5143CTASSERT(sizeof(struct zfid_long) <= sizeof(struct fid)); 5144 5145/*ARGSUSED*/ 5146static int 5147zfs_fid(vnode_t *vp, fid_t *fidp, caller_context_t *ct) 5148{ 5149 znode_t *zp = VTOZ(vp); 5150 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 5151 uint32_t gen; 5152 uint64_t gen64; 5153 uint64_t object = zp->z_id; 5154 zfid_short_t *zfid; 5155 int size, i, error; 5156 5157 ZFS_ENTER(zfsvfs); 5158 ZFS_VERIFY_ZP(zp); 5159 5160 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zfsvfs), 5161 &gen64, sizeof (uint64_t))) != 0) { 5162 ZFS_EXIT(zfsvfs); 5163 return (error); 5164 } 5165 5166 gen = (uint32_t)gen64; 5167 5168 size = (zfsvfs->z_parent != zfsvfs) ? LONG_FID_LEN : SHORT_FID_LEN; 5169 5170#ifdef illumos 5171 if (fidp->fid_len < size) { 5172 fidp->fid_len = size; 5173 ZFS_EXIT(zfsvfs); 5174 return (SET_ERROR(ENOSPC)); 5175 } 5176#else 5177 fidp->fid_len = size; 5178#endif 5179 5180 zfid = (zfid_short_t *)fidp; 5181 5182 zfid->zf_len = size; 5183 5184 for (i = 0; i < sizeof (zfid->zf_object); i++) 5185 zfid->zf_object[i] = (uint8_t)(object >> (8 * i)); 5186 5187 /* Must have a non-zero generation number to distinguish from .zfs */ 5188 if (gen == 0) 5189 gen = 1; 5190 for (i = 0; i < sizeof (zfid->zf_gen); i++) 5191 zfid->zf_gen[i] = (uint8_t)(gen >> (8 * i)); 5192 5193 if (size == LONG_FID_LEN) { 5194 uint64_t objsetid = dmu_objset_id(zfsvfs->z_os); 5195 zfid_long_t *zlfid; 5196 5197 zlfid = (zfid_long_t *)fidp; 5198 5199 for (i = 0; i < sizeof (zlfid->zf_setid); i++) 5200 zlfid->zf_setid[i] = (uint8_t)(objsetid >> (8 * i)); 5201 5202 /* XXX - this should be the generation number for the objset */ 5203 for (i = 0; i < sizeof (zlfid->zf_setgen); i++) 5204 zlfid->zf_setgen[i] = 0; 5205 } 5206 5207 ZFS_EXIT(zfsvfs); 5208 return (0); 5209} 5210 5211static int 5212zfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr, 5213 caller_context_t *ct) 5214{ 5215 znode_t *zp, *xzp; 5216 zfsvfs_t *zfsvfs; 5217 zfs_dirlock_t *dl; 5218 int error; 5219 5220 switch (cmd) { 5221 case _PC_LINK_MAX: 5222 *valp = INT_MAX; 5223 return (0); 5224 5225 case _PC_FILESIZEBITS: 5226 *valp = 64; 5227 return (0); 5228#ifdef sun 5229 case _PC_XATTR_EXISTS: 5230 zp = VTOZ(vp); 5231 zfsvfs = zp->z_zfsvfs; 5232 ZFS_ENTER(zfsvfs); 5233 ZFS_VERIFY_ZP(zp); 5234 *valp = 0; 5235 error = zfs_dirent_lock(&dl, zp, "", &xzp, 5236 ZXATTR | ZEXISTS | ZSHARED, NULL, NULL); 5237 if (error == 0) { 5238 zfs_dirent_unlock(dl); 5239 if (!zfs_dirempty(xzp)) 5240 *valp = 1; 5241 VN_RELE(ZTOV(xzp)); 5242 } else if (error == ENOENT) { 5243 /* 5244 * If there aren't extended attributes, it's the 5245 * same as having zero of them. 5246 */ 5247 error = 0; 5248 } 5249 ZFS_EXIT(zfsvfs); 5250 return (error); 5251 5252 case _PC_SATTR_ENABLED: 5253 case _PC_SATTR_EXISTS: 5254 *valp = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) && 5255 (vp->v_type == VREG || vp->v_type == VDIR); 5256 return (0); 5257 5258 case _PC_ACCESS_FILTERING: 5259 *valp = vfs_has_feature(vp->v_vfsp, VFSFT_ACCESS_FILTER) && 5260 vp->v_type == VDIR; 5261 return (0); 5262 5263 case _PC_ACL_ENABLED: 5264 *valp = _ACL_ACE_ENABLED; 5265 return (0); 5266#endif /* sun */ 5267 case _PC_MIN_HOLE_SIZE: 5268 *valp = (int)SPA_MINBLOCKSIZE; 5269 return (0); 5270#ifdef sun 5271 case _PC_TIMESTAMP_RESOLUTION: 5272 /* nanosecond timestamp resolution */ 5273 *valp = 1L; 5274 return (0); 5275#endif /* sun */ 5276 case _PC_ACL_EXTENDED: 5277 *valp = 0; 5278 return (0); 5279 5280 case _PC_ACL_NFS4: 5281 *valp = 1; 5282 return (0); 5283 5284 case _PC_ACL_PATH_MAX: 5285 *valp = ACL_MAX_ENTRIES; 5286 return (0); 5287 5288 default: 5289 return (EOPNOTSUPP); 5290 } 5291} 5292 5293/*ARGSUSED*/ 5294static int 5295zfs_getsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr, 5296 caller_context_t *ct) 5297{ 5298 znode_t *zp = VTOZ(vp); 5299 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 5300 int error; 5301 boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 5302 5303 ZFS_ENTER(zfsvfs); 5304 ZFS_VERIFY_ZP(zp); 5305 error = zfs_getacl(zp, vsecp, skipaclchk, cr); 5306 ZFS_EXIT(zfsvfs); 5307 5308 return (error); 5309} 5310 5311/*ARGSUSED*/ 5312int 5313zfs_setsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr, 5314 caller_context_t *ct) 5315{ 5316 znode_t *zp = VTOZ(vp); 5317 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 5318 int error; 5319 boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 5320 zilog_t *zilog = zfsvfs->z_log; 5321 5322 ZFS_ENTER(zfsvfs); 5323 ZFS_VERIFY_ZP(zp); 5324 5325 error = zfs_setacl(zp, vsecp, skipaclchk, cr); 5326 5327 if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 5328 zil_commit(zilog, 0); 5329 5330 ZFS_EXIT(zfsvfs); 5331 return (error); 5332} 5333 5334#ifdef sun 5335/* 5336 * The smallest read we may consider to loan out an arcbuf. 5337 * This must be a power of 2. 5338 */ 5339int zcr_blksz_min = (1 << 10); /* 1K */ 5340/* 5341 * If set to less than the file block size, allow loaning out of an 5342 * arcbuf for a partial block read. This must be a power of 2. 5343 */ 5344int zcr_blksz_max = (1 << 17); /* 128K */ 5345 5346/*ARGSUSED*/ 5347static int 5348zfs_reqzcbuf(vnode_t *vp, enum uio_rw ioflag, xuio_t *xuio, cred_t *cr, 5349 caller_context_t *ct) 5350{ 5351 znode_t *zp = VTOZ(vp); 5352 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 5353 int max_blksz = zfsvfs->z_max_blksz; 5354 uio_t *uio = &xuio->xu_uio; 5355 ssize_t size = uio->uio_resid; 5356 offset_t offset = uio->uio_loffset; 5357 int blksz; 5358 int fullblk, i; 5359 arc_buf_t *abuf; 5360 ssize_t maxsize; 5361 int preamble, postamble; 5362 5363 if (xuio->xu_type != UIOTYPE_ZEROCOPY) 5364 return (SET_ERROR(EINVAL)); 5365 5366 ZFS_ENTER(zfsvfs); 5367 ZFS_VERIFY_ZP(zp); 5368 switch (ioflag) { 5369 case UIO_WRITE: 5370 /* 5371 * Loan out an arc_buf for write if write size is bigger than 5372 * max_blksz, and the file's block size is also max_blksz. 5373 */ 5374 blksz = max_blksz; 5375 if (size < blksz || zp->z_blksz != blksz) { 5376 ZFS_EXIT(zfsvfs); 5377 return (SET_ERROR(EINVAL)); 5378 } 5379 /* 5380 * Caller requests buffers for write before knowing where the 5381 * write offset might be (e.g. NFS TCP write). 5382 */ 5383 if (offset == -1) { 5384 preamble = 0; 5385 } else { 5386 preamble = P2PHASE(offset, blksz); 5387 if (preamble) { 5388 preamble = blksz - preamble; 5389 size -= preamble; 5390 } 5391 } 5392 5393 postamble = P2PHASE(size, blksz); 5394 size -= postamble; 5395 5396 fullblk = size / blksz; 5397 (void) dmu_xuio_init(xuio, 5398 (preamble != 0) + fullblk + (postamble != 0)); 5399 DTRACE_PROBE3(zfs_reqzcbuf_align, int, preamble, 5400 int, postamble, int, 5401 (preamble != 0) + fullblk + (postamble != 0)); 5402 5403 /* 5404 * Have to fix iov base/len for partial buffers. They 5405 * currently represent full arc_buf's. 5406 */ 5407 if (preamble) { 5408 /* data begins in the middle of the arc_buf */ 5409 abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl), 5410 blksz); 5411 ASSERT(abuf); 5412 (void) dmu_xuio_add(xuio, abuf, 5413 blksz - preamble, preamble); 5414 } 5415 5416 for (i = 0; i < fullblk; i++) { 5417 abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl), 5418 blksz); 5419 ASSERT(abuf); 5420 (void) dmu_xuio_add(xuio, abuf, 0, blksz); 5421 } 5422 5423 if (postamble) { 5424 /* data ends in the middle of the arc_buf */ 5425 abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl), 5426 blksz); 5427 ASSERT(abuf); 5428 (void) dmu_xuio_add(xuio, abuf, 0, postamble); 5429 } 5430 break; 5431 case UIO_READ: 5432 /* 5433 * Loan out an arc_buf for read if the read size is larger than 5434 * the current file block size. Block alignment is not 5435 * considered. Partial arc_buf will be loaned out for read. 5436 */ 5437 blksz = zp->z_blksz; 5438 if (blksz < zcr_blksz_min) 5439 blksz = zcr_blksz_min; 5440 if (blksz > zcr_blksz_max) 5441 blksz = zcr_blksz_max; 5442 /* avoid potential complexity of dealing with it */ 5443 if (blksz > max_blksz) { 5444 ZFS_EXIT(zfsvfs); 5445 return (SET_ERROR(EINVAL)); 5446 } 5447 5448 maxsize = zp->z_size - uio->uio_loffset; 5449 if (size > maxsize) 5450 size = maxsize; 5451 5452 if (size < blksz || vn_has_cached_data(vp)) { 5453 ZFS_EXIT(zfsvfs); 5454 return (SET_ERROR(EINVAL)); 5455 } 5456 break; 5457 default: 5458 ZFS_EXIT(zfsvfs); 5459 return (SET_ERROR(EINVAL)); 5460 } 5461 5462 uio->uio_extflg = UIO_XUIO; 5463 XUIO_XUZC_RW(xuio) = ioflag; 5464 ZFS_EXIT(zfsvfs); 5465 return (0); 5466} 5467 5468/*ARGSUSED*/ 5469static int 5470zfs_retzcbuf(vnode_t *vp, xuio_t *xuio, cred_t *cr, caller_context_t *ct) 5471{ 5472 int i; 5473 arc_buf_t *abuf; 5474 int ioflag = XUIO_XUZC_RW(xuio); 5475 5476 ASSERT(xuio->xu_type == UIOTYPE_ZEROCOPY); 5477 5478 i = dmu_xuio_cnt(xuio); 5479 while (i-- > 0) { 5480 abuf = dmu_xuio_arcbuf(xuio, i); 5481 /* 5482 * if abuf == NULL, it must be a write buffer 5483 * that has been returned in zfs_write(). 5484 */ 5485 if (abuf) 5486 dmu_return_arcbuf(abuf); 5487 ASSERT(abuf || ioflag == UIO_WRITE); 5488 } 5489 5490 dmu_xuio_fini(xuio); 5491 return (0); 5492} 5493 5494/* 5495 * Predeclare these here so that the compiler assumes that 5496 * this is an "old style" function declaration that does 5497 * not include arguments => we won't get type mismatch errors 5498 * in the initializations that follow. 5499 */ 5500static int zfs_inval(); 5501static int zfs_isdir(); 5502 5503static int 5504zfs_inval() 5505{ 5506 return (SET_ERROR(EINVAL)); 5507} 5508 5509static int 5510zfs_isdir() 5511{ 5512 return (SET_ERROR(EISDIR)); 5513} 5514/* 5515 * Directory vnode operations template 5516 */ 5517vnodeops_t *zfs_dvnodeops; 5518const fs_operation_def_t zfs_dvnodeops_template[] = { 5519 VOPNAME_OPEN, { .vop_open = zfs_open }, 5520 VOPNAME_CLOSE, { .vop_close = zfs_close }, 5521 VOPNAME_READ, { .error = zfs_isdir }, 5522 VOPNAME_WRITE, { .error = zfs_isdir }, 5523 VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 5524 VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 5525 VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 5526 VOPNAME_ACCESS, { .vop_access = zfs_access }, 5527 VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 5528 VOPNAME_CREATE, { .vop_create = zfs_create }, 5529 VOPNAME_REMOVE, { .vop_remove = zfs_remove }, 5530 VOPNAME_LINK, { .vop_link = zfs_link }, 5531 VOPNAME_RENAME, { .vop_rename = zfs_rename }, 5532 VOPNAME_MKDIR, { .vop_mkdir = zfs_mkdir }, 5533 VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir }, 5534 VOPNAME_READDIR, { .vop_readdir = zfs_readdir }, 5535 VOPNAME_SYMLINK, { .vop_symlink = zfs_symlink }, 5536 VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 5537 VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 5538 VOPNAME_FID, { .vop_fid = zfs_fid }, 5539 VOPNAME_SEEK, { .vop_seek = zfs_seek }, 5540 VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 5541 VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 5542 VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 5543 VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 5544 NULL, NULL 5545}; 5546 5547/* 5548 * Regular file vnode operations template 5549 */ 5550vnodeops_t *zfs_fvnodeops; 5551const fs_operation_def_t zfs_fvnodeops_template[] = { 5552 VOPNAME_OPEN, { .vop_open = zfs_open }, 5553 VOPNAME_CLOSE, { .vop_close = zfs_close }, 5554 VOPNAME_READ, { .vop_read = zfs_read }, 5555 VOPNAME_WRITE, { .vop_write = zfs_write }, 5556 VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 5557 VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 5558 VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 5559 VOPNAME_ACCESS, { .vop_access = zfs_access }, 5560 VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 5561 VOPNAME_RENAME, { .vop_rename = zfs_rename }, 5562 VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 5563 VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 5564 VOPNAME_FID, { .vop_fid = zfs_fid }, 5565 VOPNAME_SEEK, { .vop_seek = zfs_seek }, 5566 VOPNAME_FRLOCK, { .vop_frlock = zfs_frlock }, 5567 VOPNAME_SPACE, { .vop_space = zfs_space }, 5568 VOPNAME_GETPAGE, { .vop_getpage = zfs_getpage }, 5569 VOPNAME_PUTPAGE, { .vop_putpage = zfs_putpage }, 5570 VOPNAME_MAP, { .vop_map = zfs_map }, 5571 VOPNAME_ADDMAP, { .vop_addmap = zfs_addmap }, 5572 VOPNAME_DELMAP, { .vop_delmap = zfs_delmap }, 5573 VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 5574 VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 5575 VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 5576 VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 5577 VOPNAME_REQZCBUF, { .vop_reqzcbuf = zfs_reqzcbuf }, 5578 VOPNAME_RETZCBUF, { .vop_retzcbuf = zfs_retzcbuf }, 5579 NULL, NULL 5580}; 5581 5582/* 5583 * Symbolic link vnode operations template 5584 */ 5585vnodeops_t *zfs_symvnodeops; 5586const fs_operation_def_t zfs_symvnodeops_template[] = { 5587 VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 5588 VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 5589 VOPNAME_ACCESS, { .vop_access = zfs_access }, 5590 VOPNAME_RENAME, { .vop_rename = zfs_rename }, 5591 VOPNAME_READLINK, { .vop_readlink = zfs_readlink }, 5592 VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 5593 VOPNAME_FID, { .vop_fid = zfs_fid }, 5594 VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 5595 VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 5596 NULL, NULL 5597}; 5598 5599/* 5600 * special share hidden files vnode operations template 5601 */ 5602vnodeops_t *zfs_sharevnodeops; 5603const fs_operation_def_t zfs_sharevnodeops_template[] = { 5604 VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 5605 VOPNAME_ACCESS, { .vop_access = zfs_access }, 5606 VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 5607 VOPNAME_FID, { .vop_fid = zfs_fid }, 5608 VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 5609 VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 5610 VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 5611 VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 5612 NULL, NULL 5613}; 5614 5615/* 5616 * Extended attribute directory vnode operations template 5617 * 5618 * This template is identical to the directory vnodes 5619 * operation template except for restricted operations: 5620 * VOP_MKDIR() 5621 * VOP_SYMLINK() 5622 * 5623 * Note that there are other restrictions embedded in: 5624 * zfs_create() - restrict type to VREG 5625 * zfs_link() - no links into/out of attribute space 5626 * zfs_rename() - no moves into/out of attribute space 5627 */ 5628vnodeops_t *zfs_xdvnodeops; 5629const fs_operation_def_t zfs_xdvnodeops_template[] = { 5630 VOPNAME_OPEN, { .vop_open = zfs_open }, 5631 VOPNAME_CLOSE, { .vop_close = zfs_close }, 5632 VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 5633 VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 5634 VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 5635 VOPNAME_ACCESS, { .vop_access = zfs_access }, 5636 VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 5637 VOPNAME_CREATE, { .vop_create = zfs_create }, 5638 VOPNAME_REMOVE, { .vop_remove = zfs_remove }, 5639 VOPNAME_LINK, { .vop_link = zfs_link }, 5640 VOPNAME_RENAME, { .vop_rename = zfs_rename }, 5641 VOPNAME_MKDIR, { .error = zfs_inval }, 5642 VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir }, 5643 VOPNAME_READDIR, { .vop_readdir = zfs_readdir }, 5644 VOPNAME_SYMLINK, { .error = zfs_inval }, 5645 VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 5646 VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 5647 VOPNAME_FID, { .vop_fid = zfs_fid }, 5648 VOPNAME_SEEK, { .vop_seek = zfs_seek }, 5649 VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 5650 VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 5651 VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 5652 VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 5653 NULL, NULL 5654}; 5655 5656/* 5657 * Error vnode operations template 5658 */ 5659vnodeops_t *zfs_evnodeops; 5660const fs_operation_def_t zfs_evnodeops_template[] = { 5661 VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 5662 VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 5663 NULL, NULL 5664}; 5665#endif /* sun */ 5666 5667static int 5668ioflags(int ioflags) 5669{ 5670 int flags = 0; 5671 5672 if (ioflags & IO_APPEND) 5673 flags |= FAPPEND; 5674 if (ioflags & IO_NDELAY) 5675 flags |= FNONBLOCK; 5676 if (ioflags & IO_SYNC) 5677 flags |= (FSYNC | FDSYNC | FRSYNC); 5678 5679 return (flags); 5680} 5681 5682static int 5683zfs_getpages(struct vnode *vp, vm_page_t *m, int count, int reqpage) 5684{ 5685 znode_t *zp = VTOZ(vp); 5686 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 5687 objset_t *os = zp->z_zfsvfs->z_os; 5688 vm_page_t mfirst, mlast, mreq; 5689 vm_object_t object; 5690 caddr_t va; 5691 struct sf_buf *sf; 5692 off_t startoff, endoff; 5693 int i, error; 5694 vm_pindex_t reqstart, reqend; 5695 int pcount, lsize, reqsize, size; 5696 5697 ZFS_ENTER(zfsvfs); 5698 ZFS_VERIFY_ZP(zp); 5699 5700 pcount = OFF_TO_IDX(round_page(count)); 5701 mreq = m[reqpage]; 5702 object = mreq->object; 5703 error = 0; 5704 5705 KASSERT(vp->v_object == object, ("mismatching object")); 5706 5707 if (pcount > 1 && zp->z_blksz > PAGESIZE) { 5708 startoff = rounddown(IDX_TO_OFF(mreq->pindex), zp->z_blksz); 5709 reqstart = OFF_TO_IDX(round_page(startoff)); 5710 if (reqstart < m[0]->pindex) 5711 reqstart = 0; 5712 else 5713 reqstart = reqstart - m[0]->pindex; 5714 endoff = roundup(IDX_TO_OFF(mreq->pindex) + PAGE_SIZE, 5715 zp->z_blksz); 5716 reqend = OFF_TO_IDX(trunc_page(endoff)) - 1; 5717 if (reqend > m[pcount - 1]->pindex) 5718 reqend = m[pcount - 1]->pindex; 5719 reqsize = reqend - m[reqstart]->pindex + 1; 5720 KASSERT(reqstart <= reqpage && reqpage < reqstart + reqsize, 5721 ("reqpage beyond [reqstart, reqstart + reqsize[ bounds")); 5722 } else { 5723 reqstart = reqpage; 5724 reqsize = 1; 5725 } 5726 mfirst = m[reqstart]; 5727 mlast = m[reqstart + reqsize - 1]; 5728 5729 zfs_vmobject_wlock(object); 5730 5731 for (i = 0; i < reqstart; i++) { 5732 vm_page_lock(m[i]); 5733 vm_page_free(m[i]); 5734 vm_page_unlock(m[i]); 5735 } 5736 for (i = reqstart + reqsize; i < pcount; i++) { 5737 vm_page_lock(m[i]); 5738 vm_page_free(m[i]); 5739 vm_page_unlock(m[i]); 5740 } 5741 5742 if (mreq->valid && reqsize == 1) { 5743 if (mreq->valid != VM_PAGE_BITS_ALL) 5744 vm_page_zero_invalid(mreq, TRUE); 5745 zfs_vmobject_wunlock(object); 5746 ZFS_EXIT(zfsvfs); 5747 return (zfs_vm_pagerret_ok); 5748 } 5749 5750 PCPU_INC(cnt.v_vnodein); 5751 PCPU_ADD(cnt.v_vnodepgsin, reqsize); 5752 5753 if (IDX_TO_OFF(mreq->pindex) >= object->un_pager.vnp.vnp_size) { 5754 for (i = reqstart; i < reqstart + reqsize; i++) { 5755 if (i != reqpage) { 5756 vm_page_lock(m[i]); 5757 vm_page_free(m[i]); 5758 vm_page_unlock(m[i]); 5759 } 5760 } 5761 zfs_vmobject_wunlock(object); 5762 ZFS_EXIT(zfsvfs); 5763 return (zfs_vm_pagerret_bad); 5764 } 5765 5766 lsize = PAGE_SIZE; 5767 if (IDX_TO_OFF(mlast->pindex) + lsize > object->un_pager.vnp.vnp_size) 5768 lsize = object->un_pager.vnp.vnp_size - IDX_TO_OFF(mlast->pindex); 5769 5770 zfs_vmobject_wunlock(object); 5771 5772 for (i = reqstart; i < reqstart + reqsize; i++) { 5773 size = PAGE_SIZE; 5774 if (i == (reqstart + reqsize - 1)) 5775 size = lsize; 5776 va = zfs_map_page(m[i], &sf); 5777 error = dmu_read(os, zp->z_id, IDX_TO_OFF(m[i]->pindex), 5778 size, va, DMU_READ_PREFETCH); 5779 if (size != PAGE_SIZE) 5780 bzero(va + size, PAGE_SIZE - size); 5781 zfs_unmap_page(sf); 5782 if (error != 0) 5783 break; 5784 } 5785 5786 zfs_vmobject_wlock(object); 5787 5788 for (i = reqstart; i < reqstart + reqsize; i++) { 5789 if (!error) 5790 m[i]->valid = VM_PAGE_BITS_ALL; 5791 KASSERT(m[i]->dirty == 0, ("zfs_getpages: page %p is dirty", m[i])); 5792 if (i != reqpage) 5793 vm_page_readahead_finish(m[i]); 5794 } 5795 5796 zfs_vmobject_wunlock(object); 5797 5798 ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 5799 ZFS_EXIT(zfsvfs); 5800 return (error ? zfs_vm_pagerret_error : zfs_vm_pagerret_ok); 5801} 5802 5803static int 5804zfs_freebsd_getpages(ap) 5805 struct vop_getpages_args /* { 5806 struct vnode *a_vp; 5807 vm_page_t *a_m; 5808 int a_count; 5809 int a_reqpage; 5810 vm_ooffset_t a_offset; 5811 } */ *ap; 5812{ 5813 5814 return (zfs_getpages(ap->a_vp, ap->a_m, ap->a_count, ap->a_reqpage)); 5815} 5816 5817static int 5818zfs_freebsd_bmap(ap) 5819 struct vop_bmap_args /* { 5820 struct vnode *a_vp; 5821 daddr_t a_bn; 5822 struct bufobj **a_bop; 5823 daddr_t *a_bnp; 5824 int *a_runp; 5825 int *a_runb; 5826 } */ *ap; 5827{ 5828 5829 if (ap->a_bop != NULL) 5830 *ap->a_bop = &ap->a_vp->v_bufobj; 5831 if (ap->a_bnp != NULL) 5832 *ap->a_bnp = ap->a_bn; 5833 if (ap->a_runp != NULL) 5834 *ap->a_runp = 0; 5835 if (ap->a_runb != NULL) 5836 *ap->a_runb = 0; 5837 5838 return (0); 5839} 5840 5841static int 5842zfs_freebsd_open(ap) 5843 struct vop_open_args /* { 5844 struct vnode *a_vp; 5845 int a_mode; 5846 struct ucred *a_cred; 5847 struct thread *a_td; 5848 } */ *ap; 5849{ 5850 vnode_t *vp = ap->a_vp; 5851 znode_t *zp = VTOZ(vp); 5852 int error; 5853 5854 error = zfs_open(&vp, ap->a_mode, ap->a_cred, NULL); 5855 if (error == 0) 5856 vnode_create_vobject(vp, zp->z_size, ap->a_td); 5857 return (error); 5858} 5859 5860static int 5861zfs_freebsd_close(ap) 5862 struct vop_close_args /* { 5863 struct vnode *a_vp; 5864 int a_fflag; 5865 struct ucred *a_cred; 5866 struct thread *a_td; 5867 } */ *ap; 5868{ 5869 5870 return (zfs_close(ap->a_vp, ap->a_fflag, 1, 0, ap->a_cred, NULL)); 5871} 5872 5873static int 5874zfs_freebsd_ioctl(ap) 5875 struct vop_ioctl_args /* { 5876 struct vnode *a_vp; 5877 u_long a_command; 5878 caddr_t a_data; 5879 int a_fflag; 5880 struct ucred *cred; 5881 struct thread *td; 5882 } */ *ap; 5883{ 5884 5885 return (zfs_ioctl(ap->a_vp, ap->a_command, (intptr_t)ap->a_data, 5886 ap->a_fflag, ap->a_cred, NULL, NULL)); 5887} 5888 5889static int 5890zfs_freebsd_read(ap) 5891 struct vop_read_args /* { 5892 struct vnode *a_vp; 5893 struct uio *a_uio; 5894 int a_ioflag; 5895 struct ucred *a_cred; 5896 } */ *ap; 5897{ 5898 5899 return (zfs_read(ap->a_vp, ap->a_uio, ioflags(ap->a_ioflag), 5900 ap->a_cred, NULL)); 5901} 5902 5903static int 5904zfs_freebsd_write(ap) 5905 struct vop_write_args /* { 5906 struct vnode *a_vp; 5907 struct uio *a_uio; 5908 int a_ioflag; 5909 struct ucred *a_cred; 5910 } */ *ap; 5911{ 5912 5913 return (zfs_write(ap->a_vp, ap->a_uio, ioflags(ap->a_ioflag), 5914 ap->a_cred, NULL)); 5915} 5916 5917static int 5918zfs_freebsd_access(ap) 5919 struct vop_access_args /* { 5920 struct vnode *a_vp; 5921 accmode_t a_accmode; 5922 struct ucred *a_cred; 5923 struct thread *a_td; 5924 } */ *ap; 5925{ 5926 vnode_t *vp = ap->a_vp; 5927 znode_t *zp = VTOZ(vp); 5928 accmode_t accmode; 5929 int error = 0; 5930 5931 /* 5932 * ZFS itself only knowns about VREAD, VWRITE, VEXEC and VAPPEND, 5933 */ 5934 accmode = ap->a_accmode & (VREAD|VWRITE|VEXEC|VAPPEND); 5935 if (accmode != 0) 5936 error = zfs_access(ap->a_vp, accmode, 0, ap->a_cred, NULL); 5937 5938 /* 5939 * VADMIN has to be handled by vaccess(). 5940 */ 5941 if (error == 0) { 5942 accmode = ap->a_accmode & ~(VREAD|VWRITE|VEXEC|VAPPEND); 5943 if (accmode != 0) { 5944 error = vaccess(vp->v_type, zp->z_mode, zp->z_uid, 5945 zp->z_gid, accmode, ap->a_cred, NULL); 5946 } 5947 } 5948 5949 /* 5950 * For VEXEC, ensure that at least one execute bit is set for 5951 * non-directories. 5952 */ 5953 if (error == 0 && (ap->a_accmode & VEXEC) != 0 && vp->v_type != VDIR && 5954 (zp->z_mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == 0) { 5955 error = EACCES; 5956 } 5957 5958 return (error); 5959} 5960 5961static int 5962zfs_freebsd_lookup(ap) 5963 struct vop_lookup_args /* { 5964 struct vnode *a_dvp; 5965 struct vnode **a_vpp; 5966 struct componentname *a_cnp; 5967 } */ *ap; 5968{ 5969 struct componentname *cnp = ap->a_cnp; 5970 char nm[NAME_MAX + 1]; 5971 5972 ASSERT(cnp->cn_namelen < sizeof(nm)); 5973 strlcpy(nm, cnp->cn_nameptr, MIN(cnp->cn_namelen + 1, sizeof(nm))); 5974 5975 return (zfs_lookup(ap->a_dvp, nm, ap->a_vpp, cnp, cnp->cn_nameiop, 5976 cnp->cn_cred, cnp->cn_thread, 0)); 5977} 5978 5979static int 5980zfs_freebsd_create(ap) 5981 struct vop_create_args /* { 5982 struct vnode *a_dvp; 5983 struct vnode **a_vpp; 5984 struct componentname *a_cnp; 5985 struct vattr *a_vap; 5986 } */ *ap; 5987{ 5988 struct componentname *cnp = ap->a_cnp; 5989 vattr_t *vap = ap->a_vap; 5990 int mode; 5991 5992 ASSERT(cnp->cn_flags & SAVENAME); 5993 5994 vattr_init_mask(vap); 5995 mode = vap->va_mode & ALLPERMS; 5996 5997 return (zfs_create(ap->a_dvp, cnp->cn_nameptr, vap, !EXCL, mode, 5998 ap->a_vpp, cnp->cn_cred, cnp->cn_thread)); 5999} 6000 6001static int 6002zfs_freebsd_remove(ap) 6003 struct vop_remove_args /* { 6004 struct vnode *a_dvp; 6005 struct vnode *a_vp; 6006 struct componentname *a_cnp; 6007 } */ *ap; 6008{ 6009 6010 ASSERT(ap->a_cnp->cn_flags & SAVENAME); 6011 6012 return (zfs_remove(ap->a_dvp, ap->a_cnp->cn_nameptr, 6013 ap->a_cnp->cn_cred, NULL, 0)); 6014} 6015 6016static int 6017zfs_freebsd_mkdir(ap) 6018 struct vop_mkdir_args /* { 6019 struct vnode *a_dvp; 6020 struct vnode **a_vpp; 6021 struct componentname *a_cnp; 6022 struct vattr *a_vap; 6023 } */ *ap; 6024{ 6025 vattr_t *vap = ap->a_vap; 6026 6027 ASSERT(ap->a_cnp->cn_flags & SAVENAME); 6028 6029 vattr_init_mask(vap); 6030 6031 return (zfs_mkdir(ap->a_dvp, ap->a_cnp->cn_nameptr, vap, ap->a_vpp, 6032 ap->a_cnp->cn_cred, NULL, 0, NULL)); 6033} 6034 6035static int 6036zfs_freebsd_rmdir(ap) 6037 struct vop_rmdir_args /* { 6038 struct vnode *a_dvp; 6039 struct vnode *a_vp; 6040 struct componentname *a_cnp; 6041 } */ *ap; 6042{ 6043 struct componentname *cnp = ap->a_cnp; 6044 6045 ASSERT(cnp->cn_flags & SAVENAME); 6046 6047 return (zfs_rmdir(ap->a_dvp, cnp->cn_nameptr, NULL, cnp->cn_cred, NULL, 0)); 6048} 6049 6050static int 6051zfs_freebsd_readdir(ap) 6052 struct vop_readdir_args /* { 6053 struct vnode *a_vp; 6054 struct uio *a_uio; 6055 struct ucred *a_cred; 6056 int *a_eofflag; 6057 int *a_ncookies; 6058 u_long **a_cookies; 6059 } */ *ap; 6060{ 6061 6062 return (zfs_readdir(ap->a_vp, ap->a_uio, ap->a_cred, ap->a_eofflag, 6063 ap->a_ncookies, ap->a_cookies)); 6064} 6065 6066static int 6067zfs_freebsd_fsync(ap) 6068 struct vop_fsync_args /* { 6069 struct vnode *a_vp; 6070 int a_waitfor; 6071 struct thread *a_td; 6072 } */ *ap; 6073{ 6074 6075 vop_stdfsync(ap); 6076 return (zfs_fsync(ap->a_vp, 0, ap->a_td->td_ucred, NULL)); 6077} 6078 6079static int 6080zfs_freebsd_getattr(ap) 6081 struct vop_getattr_args /* { 6082 struct vnode *a_vp; 6083 struct vattr *a_vap; 6084 struct ucred *a_cred; 6085 } */ *ap; 6086{ 6087 vattr_t *vap = ap->a_vap; 6088 xvattr_t xvap; 6089 u_long fflags = 0; 6090 int error; 6091 6092 xva_init(&xvap); 6093 xvap.xva_vattr = *vap; 6094 xvap.xva_vattr.va_mask |= AT_XVATTR; 6095 6096 /* Convert chflags into ZFS-type flags. */ 6097 /* XXX: what about SF_SETTABLE?. */ 6098 XVA_SET_REQ(&xvap, XAT_IMMUTABLE); 6099 XVA_SET_REQ(&xvap, XAT_APPENDONLY); 6100 XVA_SET_REQ(&xvap, XAT_NOUNLINK); 6101 XVA_SET_REQ(&xvap, XAT_NODUMP); 6102 XVA_SET_REQ(&xvap, XAT_READONLY); 6103 XVA_SET_REQ(&xvap, XAT_ARCHIVE); 6104 XVA_SET_REQ(&xvap, XAT_SYSTEM); 6105 XVA_SET_REQ(&xvap, XAT_HIDDEN); 6106 XVA_SET_REQ(&xvap, XAT_REPARSE); 6107 XVA_SET_REQ(&xvap, XAT_OFFLINE); 6108 XVA_SET_REQ(&xvap, XAT_SPARSE); 6109 6110 error = zfs_getattr(ap->a_vp, (vattr_t *)&xvap, 0, ap->a_cred, NULL); 6111 if (error != 0) 6112 return (error); 6113 6114 /* Convert ZFS xattr into chflags. */ 6115#define FLAG_CHECK(fflag, xflag, xfield) do { \ 6116 if (XVA_ISSET_RTN(&xvap, (xflag)) && (xfield) != 0) \ 6117 fflags |= (fflag); \ 6118} while (0) 6119 FLAG_CHECK(SF_IMMUTABLE, XAT_IMMUTABLE, 6120 xvap.xva_xoptattrs.xoa_immutable); 6121 FLAG_CHECK(SF_APPEND, XAT_APPENDONLY, 6122 xvap.xva_xoptattrs.xoa_appendonly); 6123 FLAG_CHECK(SF_NOUNLINK, XAT_NOUNLINK, 6124 xvap.xva_xoptattrs.xoa_nounlink); 6125 FLAG_CHECK(UF_ARCHIVE, XAT_ARCHIVE, 6126 xvap.xva_xoptattrs.xoa_archive); 6127 FLAG_CHECK(UF_NODUMP, XAT_NODUMP, 6128 xvap.xva_xoptattrs.xoa_nodump); 6129 FLAG_CHECK(UF_READONLY, XAT_READONLY, 6130 xvap.xva_xoptattrs.xoa_readonly); 6131 FLAG_CHECK(UF_SYSTEM, XAT_SYSTEM, 6132 xvap.xva_xoptattrs.xoa_system); 6133 FLAG_CHECK(UF_HIDDEN, XAT_HIDDEN, 6134 xvap.xva_xoptattrs.xoa_hidden); 6135 FLAG_CHECK(UF_REPARSE, XAT_REPARSE, 6136 xvap.xva_xoptattrs.xoa_reparse); 6137 FLAG_CHECK(UF_OFFLINE, XAT_OFFLINE, 6138 xvap.xva_xoptattrs.xoa_offline); 6139 FLAG_CHECK(UF_SPARSE, XAT_SPARSE, 6140 xvap.xva_xoptattrs.xoa_sparse); 6141 6142#undef FLAG_CHECK 6143 *vap = xvap.xva_vattr; 6144 vap->va_flags = fflags; 6145 return (0); 6146} 6147 6148static int 6149zfs_freebsd_setattr(ap) 6150 struct vop_setattr_args /* { 6151 struct vnode *a_vp; 6152 struct vattr *a_vap; 6153 struct ucred *a_cred; 6154 } */ *ap; 6155{ 6156 vnode_t *vp = ap->a_vp; 6157 vattr_t *vap = ap->a_vap; 6158 cred_t *cred = ap->a_cred; 6159 xvattr_t xvap; 6160 u_long fflags; 6161 uint64_t zflags; 6162 6163 vattr_init_mask(vap); 6164 vap->va_mask &= ~AT_NOSET; 6165 6166 xva_init(&xvap); 6167 xvap.xva_vattr = *vap; 6168 6169 zflags = VTOZ(vp)->z_pflags; 6170 6171 if (vap->va_flags != VNOVAL) { 6172 zfsvfs_t *zfsvfs = VTOZ(vp)->z_zfsvfs; 6173 int error; 6174 6175 if (zfsvfs->z_use_fuids == B_FALSE) 6176 return (EOPNOTSUPP); 6177 6178 fflags = vap->va_flags; 6179 /* 6180 * XXX KDM 6181 * We need to figure out whether it makes sense to allow 6182 * UF_REPARSE through, since we don't really have other 6183 * facilities to handle reparse points and zfs_setattr() 6184 * doesn't currently allow setting that attribute anyway. 6185 */ 6186 if ((fflags & ~(SF_IMMUTABLE|SF_APPEND|SF_NOUNLINK|UF_ARCHIVE| 6187 UF_NODUMP|UF_SYSTEM|UF_HIDDEN|UF_READONLY|UF_REPARSE| 6188 UF_OFFLINE|UF_SPARSE)) != 0) 6189 return (EOPNOTSUPP); 6190 /* 6191 * Unprivileged processes are not permitted to unset system 6192 * flags, or modify flags if any system flags are set. 6193 * Privileged non-jail processes may not modify system flags 6194 * if securelevel > 0 and any existing system flags are set. 6195 * Privileged jail processes behave like privileged non-jail 6196 * processes if the security.jail.chflags_allowed sysctl is 6197 * is non-zero; otherwise, they behave like unprivileged 6198 * processes. 6199 */ 6200 if (secpolicy_fs_owner(vp->v_mount, cred) == 0 || 6201 priv_check_cred(cred, PRIV_VFS_SYSFLAGS, 0) == 0) { 6202 if (zflags & 6203 (ZFS_IMMUTABLE | ZFS_APPENDONLY | ZFS_NOUNLINK)) { 6204 error = securelevel_gt(cred, 0); 6205 if (error != 0) 6206 return (error); 6207 } 6208 } else { 6209 /* 6210 * Callers may only modify the file flags on objects they 6211 * have VADMIN rights for. 6212 */ 6213 if ((error = VOP_ACCESS(vp, VADMIN, cred, curthread)) != 0) 6214 return (error); 6215 if (zflags & 6216 (ZFS_IMMUTABLE | ZFS_APPENDONLY | ZFS_NOUNLINK)) { 6217 return (EPERM); 6218 } 6219 if (fflags & 6220 (SF_IMMUTABLE | SF_APPEND | SF_NOUNLINK)) { 6221 return (EPERM); 6222 } 6223 } 6224 6225#define FLAG_CHANGE(fflag, zflag, xflag, xfield) do { \ 6226 if (((fflags & (fflag)) && !(zflags & (zflag))) || \ 6227 ((zflags & (zflag)) && !(fflags & (fflag)))) { \ 6228 XVA_SET_REQ(&xvap, (xflag)); \ 6229 (xfield) = ((fflags & (fflag)) != 0); \ 6230 } \ 6231} while (0) 6232 /* Convert chflags into ZFS-type flags. */ 6233 /* XXX: what about SF_SETTABLE?. */ 6234 FLAG_CHANGE(SF_IMMUTABLE, ZFS_IMMUTABLE, XAT_IMMUTABLE, 6235 xvap.xva_xoptattrs.xoa_immutable); 6236 FLAG_CHANGE(SF_APPEND, ZFS_APPENDONLY, XAT_APPENDONLY, 6237 xvap.xva_xoptattrs.xoa_appendonly); 6238 FLAG_CHANGE(SF_NOUNLINK, ZFS_NOUNLINK, XAT_NOUNLINK, 6239 xvap.xva_xoptattrs.xoa_nounlink); 6240 FLAG_CHANGE(UF_ARCHIVE, ZFS_ARCHIVE, XAT_ARCHIVE, 6241 xvap.xva_xoptattrs.xoa_archive); 6242 FLAG_CHANGE(UF_NODUMP, ZFS_NODUMP, XAT_NODUMP, 6243 xvap.xva_xoptattrs.xoa_nodump); 6244 FLAG_CHANGE(UF_READONLY, ZFS_READONLY, XAT_READONLY, 6245 xvap.xva_xoptattrs.xoa_readonly); 6246 FLAG_CHANGE(UF_SYSTEM, ZFS_SYSTEM, XAT_SYSTEM, 6247 xvap.xva_xoptattrs.xoa_system); 6248 FLAG_CHANGE(UF_HIDDEN, ZFS_HIDDEN, XAT_HIDDEN, 6249 xvap.xva_xoptattrs.xoa_hidden); 6250 FLAG_CHANGE(UF_REPARSE, ZFS_REPARSE, XAT_REPARSE, 6251 xvap.xva_xoptattrs.xoa_hidden); 6252 FLAG_CHANGE(UF_OFFLINE, ZFS_OFFLINE, XAT_OFFLINE, 6253 xvap.xva_xoptattrs.xoa_offline); 6254 FLAG_CHANGE(UF_SPARSE, ZFS_SPARSE, XAT_SPARSE, 6255 xvap.xva_xoptattrs.xoa_sparse); 6256#undef FLAG_CHANGE 6257 } 6258 return (zfs_setattr(vp, (vattr_t *)&xvap, 0, cred, NULL)); 6259} 6260 6261static int 6262zfs_freebsd_rename(ap) 6263 struct vop_rename_args /* { 6264 struct vnode *a_fdvp; 6265 struct vnode *a_fvp; 6266 struct componentname *a_fcnp; 6267 struct vnode *a_tdvp; 6268 struct vnode *a_tvp; 6269 struct componentname *a_tcnp; 6270 } */ *ap; 6271{ 6272 vnode_t *fdvp = ap->a_fdvp; 6273 vnode_t *fvp = ap->a_fvp; 6274 vnode_t *tdvp = ap->a_tdvp; 6275 vnode_t *tvp = ap->a_tvp; 6276 int error; 6277 6278 ASSERT(ap->a_fcnp->cn_flags & (SAVENAME|SAVESTART)); 6279 ASSERT(ap->a_tcnp->cn_flags & (SAVENAME|SAVESTART)); 6280 6281 /* 6282 * Check for cross-device rename. 6283 */ 6284 if ((fdvp->v_mount != tdvp->v_mount) || 6285 (tvp && (fdvp->v_mount != tvp->v_mount))) 6286 error = EXDEV; 6287 else 6288 error = zfs_rename(fdvp, ap->a_fcnp->cn_nameptr, tdvp, 6289 ap->a_tcnp->cn_nameptr, ap->a_fcnp->cn_cred, NULL, 0); 6290 if (tdvp == tvp) 6291 VN_RELE(tdvp); 6292 else 6293 VN_URELE(tdvp); 6294 if (tvp) 6295 VN_URELE(tvp); 6296 VN_RELE(fdvp); 6297 VN_RELE(fvp); 6298 6299 return (error); 6300} 6301 6302static int 6303zfs_freebsd_symlink(ap) 6304 struct vop_symlink_args /* { 6305 struct vnode *a_dvp; 6306 struct vnode **a_vpp; 6307 struct componentname *a_cnp; 6308 struct vattr *a_vap; 6309 char *a_target; 6310 } */ *ap; 6311{ 6312 struct componentname *cnp = ap->a_cnp; 6313 vattr_t *vap = ap->a_vap; 6314 6315 ASSERT(cnp->cn_flags & SAVENAME); 6316 6317 vap->va_type = VLNK; /* FreeBSD: Syscall only sets va_mode. */ 6318 vattr_init_mask(vap); 6319 6320 return (zfs_symlink(ap->a_dvp, ap->a_vpp, cnp->cn_nameptr, vap, 6321 ap->a_target, cnp->cn_cred, cnp->cn_thread)); 6322} 6323 6324static int 6325zfs_freebsd_readlink(ap) 6326 struct vop_readlink_args /* { 6327 struct vnode *a_vp; 6328 struct uio *a_uio; 6329 struct ucred *a_cred; 6330 } */ *ap; 6331{ 6332 6333 return (zfs_readlink(ap->a_vp, ap->a_uio, ap->a_cred, NULL)); 6334} 6335 6336static int 6337zfs_freebsd_link(ap) 6338 struct vop_link_args /* { 6339 struct vnode *a_tdvp; 6340 struct vnode *a_vp; 6341 struct componentname *a_cnp; 6342 } */ *ap; 6343{ 6344 struct componentname *cnp = ap->a_cnp; 6345 vnode_t *vp = ap->a_vp; 6346 vnode_t *tdvp = ap->a_tdvp; 6347 6348 if (tdvp->v_mount != vp->v_mount) 6349 return (EXDEV); 6350 6351 ASSERT(cnp->cn_flags & SAVENAME); 6352 6353 return (zfs_link(tdvp, vp, cnp->cn_nameptr, cnp->cn_cred, NULL, 0)); 6354} 6355 6356static int 6357zfs_freebsd_inactive(ap) 6358 struct vop_inactive_args /* { 6359 struct vnode *a_vp; 6360 struct thread *a_td; 6361 } */ *ap; 6362{ 6363 vnode_t *vp = ap->a_vp; 6364 6365 zfs_inactive(vp, ap->a_td->td_ucred, NULL); 6366 return (0); 6367} 6368 6369static int 6370zfs_freebsd_reclaim(ap) 6371 struct vop_reclaim_args /* { 6372 struct vnode *a_vp; 6373 struct thread *a_td; 6374 } */ *ap; 6375{ 6376 vnode_t *vp = ap->a_vp; 6377 znode_t *zp = VTOZ(vp); 6378 zfsvfs_t *zfsvfs = zp->z_zfsvfs; 6379 6380 ASSERT(zp != NULL); 6381 6382 /* Destroy the vm object and flush associated pages. */ 6383 vnode_destroy_vobject(vp); 6384 6385 /* 6386 * z_teardown_inactive_lock protects from a race with 6387 * zfs_znode_dmu_fini in zfsvfs_teardown during 6388 * force unmount. 6389 */ 6390 rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_READER); 6391 if (zp->z_sa_hdl == NULL) 6392 zfs_znode_free(zp); 6393 else 6394 zfs_zinactive(zp); 6395 rw_exit(&zfsvfs->z_teardown_inactive_lock); 6396 6397 vp->v_data = NULL; 6398 return (0); 6399} 6400 6401static int 6402zfs_freebsd_fid(ap) 6403 struct vop_fid_args /* { 6404 struct vnode *a_vp; 6405 struct fid *a_fid; 6406 } */ *ap; 6407{ 6408 6409 return (zfs_fid(ap->a_vp, (void *)ap->a_fid, NULL)); 6410} 6411 6412static int 6413zfs_freebsd_pathconf(ap) 6414 struct vop_pathconf_args /* { 6415 struct vnode *a_vp; 6416 int a_name; 6417 register_t *a_retval; 6418 } */ *ap; 6419{ 6420 ulong_t val; 6421 int error; 6422 6423 error = zfs_pathconf(ap->a_vp, ap->a_name, &val, curthread->td_ucred, NULL); 6424 if (error == 0) 6425 *ap->a_retval = val; 6426 else if (error == EOPNOTSUPP) 6427 error = vop_stdpathconf(ap); 6428 return (error); 6429} 6430 6431static int 6432zfs_freebsd_fifo_pathconf(ap) 6433 struct vop_pathconf_args /* { 6434 struct vnode *a_vp; 6435 int a_name; 6436 register_t *a_retval; 6437 } */ *ap; 6438{ 6439 6440 switch (ap->a_name) { 6441 case _PC_ACL_EXTENDED: 6442 case _PC_ACL_NFS4: 6443 case _PC_ACL_PATH_MAX: 6444 case _PC_MAC_PRESENT: 6445 return (zfs_freebsd_pathconf(ap)); 6446 default: 6447 return (fifo_specops.vop_pathconf(ap)); 6448 } 6449} 6450 6451/* 6452 * FreeBSD's extended attributes namespace defines file name prefix for ZFS' 6453 * extended attribute name: 6454 * 6455 * NAMESPACE PREFIX 6456 * system freebsd:system: 6457 * user (none, can be used to access ZFS fsattr(5) attributes 6458 * created on Solaris) 6459 */ 6460static int 6461zfs_create_attrname(int attrnamespace, const char *name, char *attrname, 6462 size_t size) 6463{ 6464 const char *namespace, *prefix, *suffix; 6465 6466 /* We don't allow '/' character in attribute name. */ 6467 if (strchr(name, '/') != NULL) 6468 return (EINVAL); 6469 /* We don't allow attribute names that start with "freebsd:" string. */ 6470 if (strncmp(name, "freebsd:", 8) == 0) 6471 return (EINVAL); 6472 6473 bzero(attrname, size); 6474 6475 switch (attrnamespace) { 6476 case EXTATTR_NAMESPACE_USER: 6477#if 0 6478 prefix = "freebsd:"; 6479 namespace = EXTATTR_NAMESPACE_USER_STRING; 6480 suffix = ":"; 6481#else 6482 /* 6483 * This is the default namespace by which we can access all 6484 * attributes created on Solaris. 6485 */ 6486 prefix = namespace = suffix = ""; 6487#endif 6488 break; 6489 case EXTATTR_NAMESPACE_SYSTEM: 6490 prefix = "freebsd:"; 6491 namespace = EXTATTR_NAMESPACE_SYSTEM_STRING; 6492 suffix = ":"; 6493 break; 6494 case EXTATTR_NAMESPACE_EMPTY: 6495 default: 6496 return (EINVAL); 6497 } 6498 if (snprintf(attrname, size, "%s%s%s%s", prefix, namespace, suffix, 6499 name) >= size) { 6500 return (ENAMETOOLONG); 6501 } 6502 return (0); 6503} 6504 6505/* 6506 * Vnode operating to retrieve a named extended attribute. 6507 */ 6508static int 6509zfs_getextattr(struct vop_getextattr_args *ap) 6510/* 6511vop_getextattr { 6512 IN struct vnode *a_vp; 6513 IN int a_attrnamespace; 6514 IN const char *a_name; 6515 INOUT struct uio *a_uio; 6516 OUT size_t *a_size; 6517 IN struct ucred *a_cred; 6518 IN struct thread *a_td; 6519}; 6520*/ 6521{ 6522 zfsvfs_t *zfsvfs = VTOZ(ap->a_vp)->z_zfsvfs; 6523 struct thread *td = ap->a_td; 6524 struct nameidata nd; 6525 char attrname[255]; 6526 struct vattr va; 6527 vnode_t *xvp = NULL, *vp; 6528 int error, flags; 6529 6530 error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace, 6531 ap->a_cred, ap->a_td, VREAD); 6532 if (error != 0) 6533 return (error); 6534 6535 error = zfs_create_attrname(ap->a_attrnamespace, ap->a_name, attrname, 6536 sizeof(attrname)); 6537 if (error != 0) 6538 return (error); 6539 6540 ZFS_ENTER(zfsvfs); 6541 6542 error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td, 6543 LOOKUP_XATTR); 6544 if (error != 0) { 6545 ZFS_EXIT(zfsvfs); 6546 return (error); 6547 } 6548 6549 flags = FREAD; 6550 NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, attrname, 6551 xvp, td); 6552 error = vn_open_cred(&nd, &flags, 0, 0, ap->a_cred, NULL); 6553 vp = nd.ni_vp; 6554 NDFREE(&nd, NDF_ONLY_PNBUF); 6555 if (error != 0) { 6556 ZFS_EXIT(zfsvfs); 6557 if (error == ENOENT) 6558 error = ENOATTR; 6559 return (error); 6560 } 6561 6562 if (ap->a_size != NULL) { 6563 error = VOP_GETATTR(vp, &va, ap->a_cred); 6564 if (error == 0) 6565 *ap->a_size = (size_t)va.va_size; 6566 } else if (ap->a_uio != NULL) 6567 error = VOP_READ(vp, ap->a_uio, IO_UNIT, ap->a_cred); 6568 6569 VOP_UNLOCK(vp, 0); 6570 vn_close(vp, flags, ap->a_cred, td); 6571 ZFS_EXIT(zfsvfs); 6572 6573 return (error); 6574} 6575 6576/* 6577 * Vnode operation to remove a named attribute. 6578 */ 6579int 6580zfs_deleteextattr(struct vop_deleteextattr_args *ap) 6581/* 6582vop_deleteextattr { 6583 IN struct vnode *a_vp; 6584 IN int a_attrnamespace; 6585 IN const char *a_name; 6586 IN struct ucred *a_cred; 6587 IN struct thread *a_td; 6588}; 6589*/ 6590{ 6591 zfsvfs_t *zfsvfs = VTOZ(ap->a_vp)->z_zfsvfs; 6592 struct thread *td = ap->a_td; 6593 struct nameidata nd; 6594 char attrname[255]; 6595 struct vattr va; 6596 vnode_t *xvp = NULL, *vp; 6597 int error, flags; 6598 6599 error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace, 6600 ap->a_cred, ap->a_td, VWRITE); 6601 if (error != 0) 6602 return (error); 6603 6604 error = zfs_create_attrname(ap->a_attrnamespace, ap->a_name, attrname, 6605 sizeof(attrname)); 6606 if (error != 0) 6607 return (error); 6608 6609 ZFS_ENTER(zfsvfs); 6610 6611 error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td, 6612 LOOKUP_XATTR); 6613 if (error != 0) { 6614 ZFS_EXIT(zfsvfs); 6615 return (error); 6616 } 6617 6618 NDINIT_ATVP(&nd, DELETE, NOFOLLOW | LOCKPARENT | LOCKLEAF, 6619 UIO_SYSSPACE, attrname, xvp, td); 6620 error = namei(&nd); 6621 vp = nd.ni_vp; 6622 NDFREE(&nd, NDF_ONLY_PNBUF); 6623 if (error != 0) { 6624 ZFS_EXIT(zfsvfs); 6625 if (error == ENOENT) 6626 error = ENOATTR; 6627 return (error); 6628 } 6629 error = VOP_REMOVE(nd.ni_dvp, vp, &nd.ni_cnd); 6630 6631 vput(nd.ni_dvp); 6632 if (vp == nd.ni_dvp) 6633 vrele(vp); 6634 else 6635 vput(vp); 6636 ZFS_EXIT(zfsvfs); 6637 6638 return (error); 6639} 6640 6641/* 6642 * Vnode operation to set a named attribute. 6643 */ 6644static int 6645zfs_setextattr(struct vop_setextattr_args *ap) 6646/* 6647vop_setextattr { 6648 IN struct vnode *a_vp; 6649 IN int a_attrnamespace; 6650 IN const char *a_name; 6651 INOUT struct uio *a_uio; 6652 IN struct ucred *a_cred; 6653 IN struct thread *a_td; 6654}; 6655*/ 6656{ 6657 zfsvfs_t *zfsvfs = VTOZ(ap->a_vp)->z_zfsvfs; 6658 struct thread *td = ap->a_td; 6659 struct nameidata nd; 6660 char attrname[255]; 6661 struct vattr va; 6662 vnode_t *xvp = NULL, *vp; 6663 int error, flags; 6664 6665 error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace, 6666 ap->a_cred, ap->a_td, VWRITE); 6667 if (error != 0) 6668 return (error); 6669 6670 error = zfs_create_attrname(ap->a_attrnamespace, ap->a_name, attrname, 6671 sizeof(attrname)); 6672 if (error != 0) 6673 return (error); 6674 6675 ZFS_ENTER(zfsvfs); 6676 6677 error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td, 6678 LOOKUP_XATTR | CREATE_XATTR_DIR); 6679 if (error != 0) { 6680 ZFS_EXIT(zfsvfs); 6681 return (error); 6682 } 6683 6684 flags = FFLAGS(O_WRONLY | O_CREAT); 6685 NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, attrname, 6686 xvp, td); 6687 error = vn_open_cred(&nd, &flags, 0600, 0, ap->a_cred, NULL); 6688 vp = nd.ni_vp; 6689 NDFREE(&nd, NDF_ONLY_PNBUF); 6690 if (error != 0) { 6691 ZFS_EXIT(zfsvfs); 6692 return (error); 6693 } 6694 6695 VATTR_NULL(&va); 6696 va.va_size = 0; 6697 error = VOP_SETATTR(vp, &va, ap->a_cred); 6698 if (error == 0) 6699 VOP_WRITE(vp, ap->a_uio, IO_UNIT | IO_SYNC, ap->a_cred); 6700 6701 VOP_UNLOCK(vp, 0); 6702 vn_close(vp, flags, ap->a_cred, td); 6703 ZFS_EXIT(zfsvfs); 6704 6705 return (error); 6706} 6707 6708/* 6709 * Vnode operation to retrieve extended attributes on a vnode. 6710 */ 6711static int 6712zfs_listextattr(struct vop_listextattr_args *ap) 6713/* 6714vop_listextattr { 6715 IN struct vnode *a_vp; 6716 IN int a_attrnamespace; 6717 INOUT struct uio *a_uio; 6718 OUT size_t *a_size; 6719 IN struct ucred *a_cred; 6720 IN struct thread *a_td; 6721}; 6722*/ 6723{ 6724 zfsvfs_t *zfsvfs = VTOZ(ap->a_vp)->z_zfsvfs; 6725 struct thread *td = ap->a_td; 6726 struct nameidata nd; 6727 char attrprefix[16]; 6728 u_char dirbuf[sizeof(struct dirent)]; 6729 struct dirent *dp; 6730 struct iovec aiov; 6731 struct uio auio, *uio = ap->a_uio; 6732 size_t *sizep = ap->a_size; 6733 size_t plen; 6734 vnode_t *xvp = NULL, *vp; 6735 int done, error, eof, pos; 6736 6737 error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace, 6738 ap->a_cred, ap->a_td, VREAD); 6739 if (error != 0) 6740 return (error); 6741 6742 error = zfs_create_attrname(ap->a_attrnamespace, "", attrprefix, 6743 sizeof(attrprefix)); 6744 if (error != 0) 6745 return (error); 6746 plen = strlen(attrprefix); 6747 6748 ZFS_ENTER(zfsvfs); 6749 6750 if (sizep != NULL) 6751 *sizep = 0; 6752 6753 error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td, 6754 LOOKUP_XATTR); 6755 if (error != 0) { 6756 ZFS_EXIT(zfsvfs); 6757 /* 6758 * ENOATTR means that the EA directory does not yet exist, 6759 * i.e. there are no extended attributes there. 6760 */ 6761 if (error == ENOATTR) 6762 error = 0; 6763 return (error); 6764 } 6765 6766 NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | LOCKSHARED, 6767 UIO_SYSSPACE, ".", xvp, td); 6768 error = namei(&nd); 6769 vp = nd.ni_vp; 6770 NDFREE(&nd, NDF_ONLY_PNBUF); 6771 if (error != 0) { 6772 ZFS_EXIT(zfsvfs); 6773 return (error); 6774 } 6775 6776 auio.uio_iov = &aiov; 6777 auio.uio_iovcnt = 1; 6778 auio.uio_segflg = UIO_SYSSPACE; 6779 auio.uio_td = td; 6780 auio.uio_rw = UIO_READ; 6781 auio.uio_offset = 0; 6782 6783 do { 6784 u_char nlen; 6785 6786 aiov.iov_base = (void *)dirbuf; 6787 aiov.iov_len = sizeof(dirbuf); 6788 auio.uio_resid = sizeof(dirbuf); 6789 error = VOP_READDIR(vp, &auio, ap->a_cred, &eof, NULL, NULL); 6790 done = sizeof(dirbuf) - auio.uio_resid; 6791 if (error != 0) 6792 break; 6793 for (pos = 0; pos < done;) { 6794 dp = (struct dirent *)(dirbuf + pos); 6795 pos += dp->d_reclen; 6796 /* 6797 * XXX: Temporarily we also accept DT_UNKNOWN, as this 6798 * is what we get when attribute was created on Solaris. 6799 */ 6800 if (dp->d_type != DT_REG && dp->d_type != DT_UNKNOWN) 6801 continue; 6802 if (plen == 0 && strncmp(dp->d_name, "freebsd:", 8) == 0) 6803 continue; 6804 else if (strncmp(dp->d_name, attrprefix, plen) != 0) 6805 continue; 6806 nlen = dp->d_namlen - plen; 6807 if (sizep != NULL) 6808 *sizep += 1 + nlen; 6809 else if (uio != NULL) { 6810 /* 6811 * Format of extattr name entry is one byte for 6812 * length and the rest for name. 6813 */ 6814 error = uiomove(&nlen, 1, uio->uio_rw, uio); 6815 if (error == 0) { 6816 error = uiomove(dp->d_name + plen, nlen, 6817 uio->uio_rw, uio); 6818 } 6819 if (error != 0) 6820 break; 6821 } 6822 } 6823 } while (!eof && error == 0); 6824 6825 vput(vp); 6826 ZFS_EXIT(zfsvfs); 6827 6828 return (error); 6829} 6830 6831int 6832zfs_freebsd_getacl(ap) 6833 struct vop_getacl_args /* { 6834 struct vnode *vp; 6835 acl_type_t type; 6836 struct acl *aclp; 6837 struct ucred *cred; 6838 struct thread *td; 6839 } */ *ap; 6840{ 6841 int error; 6842 vsecattr_t vsecattr; 6843 6844 if (ap->a_type != ACL_TYPE_NFS4) 6845 return (EINVAL); 6846 6847 vsecattr.vsa_mask = VSA_ACE | VSA_ACECNT; 6848 if (error = zfs_getsecattr(ap->a_vp, &vsecattr, 0, ap->a_cred, NULL)) 6849 return (error); 6850 6851 error = acl_from_aces(ap->a_aclp, vsecattr.vsa_aclentp, vsecattr.vsa_aclcnt); 6852 if (vsecattr.vsa_aclentp != NULL) 6853 kmem_free(vsecattr.vsa_aclentp, vsecattr.vsa_aclentsz); 6854 6855 return (error); 6856} 6857 6858int 6859zfs_freebsd_setacl(ap) 6860 struct vop_setacl_args /* { 6861 struct vnode *vp; 6862 acl_type_t type; 6863 struct acl *aclp; 6864 struct ucred *cred; 6865 struct thread *td; 6866 } */ *ap; 6867{ 6868 int error; 6869 vsecattr_t vsecattr; 6870 int aclbsize; /* size of acl list in bytes */ 6871 aclent_t *aaclp; 6872 6873 if (ap->a_type != ACL_TYPE_NFS4) 6874 return (EINVAL); 6875 6876 if (ap->a_aclp->acl_cnt < 1 || ap->a_aclp->acl_cnt > MAX_ACL_ENTRIES) 6877 return (EINVAL); 6878 6879 /* 6880 * With NFSv4 ACLs, chmod(2) may need to add additional entries, 6881 * splitting every entry into two and appending "canonical six" 6882 * entries at the end. Don't allow for setting an ACL that would 6883 * cause chmod(2) to run out of ACL entries. 6884 */ 6885 if (ap->a_aclp->acl_cnt * 2 + 6 > ACL_MAX_ENTRIES) 6886 return (ENOSPC); 6887 6888 error = acl_nfs4_check(ap->a_aclp, ap->a_vp->v_type == VDIR); 6889 if (error != 0) 6890 return (error); 6891 6892 vsecattr.vsa_mask = VSA_ACE; 6893 aclbsize = ap->a_aclp->acl_cnt * sizeof(ace_t); 6894 vsecattr.vsa_aclentp = kmem_alloc(aclbsize, KM_SLEEP); 6895 aaclp = vsecattr.vsa_aclentp; 6896 vsecattr.vsa_aclentsz = aclbsize; 6897 6898 aces_from_acl(vsecattr.vsa_aclentp, &vsecattr.vsa_aclcnt, ap->a_aclp); 6899 error = zfs_setsecattr(ap->a_vp, &vsecattr, 0, ap->a_cred, NULL); 6900 kmem_free(aaclp, aclbsize); 6901 6902 return (error); 6903} 6904 6905int 6906zfs_freebsd_aclcheck(ap) 6907 struct vop_aclcheck_args /* { 6908 struct vnode *vp; 6909 acl_type_t type; 6910 struct acl *aclp; 6911 struct ucred *cred; 6912 struct thread *td; 6913 } */ *ap; 6914{ 6915 6916 return (EOPNOTSUPP); 6917} 6918 6919struct vop_vector zfs_vnodeops; 6920struct vop_vector zfs_fifoops; 6921struct vop_vector zfs_shareops; 6922 6923struct vop_vector zfs_vnodeops = { 6924 .vop_default = &default_vnodeops, 6925 .vop_inactive = zfs_freebsd_inactive, 6926 .vop_reclaim = zfs_freebsd_reclaim, 6927 .vop_access = zfs_freebsd_access, 6928#ifdef FREEBSD_NAMECACHE 6929 .vop_lookup = vfs_cache_lookup, 6930 .vop_cachedlookup = zfs_freebsd_lookup, 6931#else 6932 .vop_lookup = zfs_freebsd_lookup, 6933#endif 6934 .vop_getattr = zfs_freebsd_getattr, 6935 .vop_setattr = zfs_freebsd_setattr, 6936 .vop_create = zfs_freebsd_create, 6937 .vop_mknod = zfs_freebsd_create, 6938 .vop_mkdir = zfs_freebsd_mkdir, 6939 .vop_readdir = zfs_freebsd_readdir, 6940 .vop_fsync = zfs_freebsd_fsync, 6941 .vop_open = zfs_freebsd_open, 6942 .vop_close = zfs_freebsd_close, 6943 .vop_rmdir = zfs_freebsd_rmdir, 6944 .vop_ioctl = zfs_freebsd_ioctl, 6945 .vop_link = zfs_freebsd_link, 6946 .vop_symlink = zfs_freebsd_symlink, 6947 .vop_readlink = zfs_freebsd_readlink, 6948 .vop_read = zfs_freebsd_read, 6949 .vop_write = zfs_freebsd_write, 6950 .vop_remove = zfs_freebsd_remove, 6951 .vop_rename = zfs_freebsd_rename, 6952 .vop_pathconf = zfs_freebsd_pathconf, 6953 .vop_bmap = zfs_freebsd_bmap, 6954 .vop_fid = zfs_freebsd_fid, 6955 .vop_getextattr = zfs_getextattr, 6956 .vop_deleteextattr = zfs_deleteextattr, 6957 .vop_setextattr = zfs_setextattr, 6958 .vop_listextattr = zfs_listextattr, 6959 .vop_getacl = zfs_freebsd_getacl, 6960 .vop_setacl = zfs_freebsd_setacl, 6961 .vop_aclcheck = zfs_freebsd_aclcheck, 6962 .vop_getpages = zfs_freebsd_getpages, 6963}; 6964 6965struct vop_vector zfs_fifoops = { 6966 .vop_default = &fifo_specops, 6967 .vop_fsync = zfs_freebsd_fsync, 6968 .vop_access = zfs_freebsd_access, 6969 .vop_getattr = zfs_freebsd_getattr, 6970 .vop_inactive = zfs_freebsd_inactive, 6971 .vop_read = VOP_PANIC, 6972 .vop_reclaim = zfs_freebsd_reclaim, 6973 .vop_setattr = zfs_freebsd_setattr, 6974 .vop_write = VOP_PANIC, 6975 .vop_pathconf = zfs_freebsd_fifo_pathconf, 6976 .vop_fid = zfs_freebsd_fid, 6977 .vop_getacl = zfs_freebsd_getacl, 6978 .vop_setacl = zfs_freebsd_setacl, 6979 .vop_aclcheck = zfs_freebsd_aclcheck, 6980}; 6981 6982/* 6983 * special share hidden files vnode operations template 6984 */ 6985struct vop_vector zfs_shareops = { 6986 .vop_default = &default_vnodeops, 6987 .vop_access = zfs_freebsd_access, 6988 .vop_inactive = zfs_freebsd_inactive, 6989 .vop_reclaim = zfs_freebsd_reclaim, 6990 .vop_fid = zfs_freebsd_fid, 6991 .vop_pathconf = zfs_freebsd_pathconf, 6992}; 6993