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