| /* |
| * CDDL HEADER START |
| * |
| * The contents of this file are subject to the terms of the |
| * Common Development and Distribution License (the "License"). |
| * You may not use this file except in compliance with the License. |
| * |
| * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
| * or http://www.opensolaris.org/os/licensing. |
| * See the License for the specific language governing permissions |
| * and limitations under the License. |
| * |
| * When distributing Covered Code, include this CDDL HEADER in each |
| * file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
| * If applicable, add the following below this CDDL HEADER, with the |
| * fields enclosed by brackets "[]" replaced with your own identifying |
| * information: Portions Copyright [yyyy] [name of copyright owner] |
| * |
| * CDDL HEADER END |
| */ |
| |
| /* |
| * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2012, 2015 by Delphix. All rights reserved. |
| * Copyright (c) 2014 Integros [integros.com] |
| * Copyright 2017 Nexenta Systems, Inc. |
| */ |
| |
| /* Portions Copyright 2007 Jeremy Teo */ |
| /* Portions Copyright 2010 Robert Milkowski */ |
| |
| |
| #include <sys/types.h> |
| #include <sys/param.h> |
| #include <sys/time.h> |
| #include <sys/systm.h> |
| #include <sys/sysmacros.h> |
| #include <sys/resource.h> |
| #include <sys/vfs.h> |
| #include <sys/endian.h> |
| #include <sys/vm.h> |
| #include <sys/vnode.h> |
| #if __FreeBSD_version >= 1300102 |
| #include <sys/smr.h> |
| #endif |
| #include <sys/dirent.h> |
| #include <sys/file.h> |
| #include <sys/stat.h> |
| #include <sys/kmem.h> |
| #include <sys/taskq.h> |
| #include <sys/uio.h> |
| #include <sys/atomic.h> |
| #include <sys/namei.h> |
| #include <sys/mman.h> |
| #include <sys/cmn_err.h> |
| #include <sys/kdb.h> |
| #include <sys/sysproto.h> |
| #include <sys/errno.h> |
| #include <sys/unistd.h> |
| #include <sys/zfs_dir.h> |
| #include <sys/zfs_ioctl.h> |
| #include <sys/fs/zfs.h> |
| #include <sys/dmu.h> |
| #include <sys/dmu_objset.h> |
| #include <sys/spa.h> |
| #include <sys/txg.h> |
| #include <sys/dbuf.h> |
| #include <sys/zap.h> |
| #include <sys/sa.h> |
| #include <sys/policy.h> |
| #include <sys/sunddi.h> |
| #include <sys/filio.h> |
| #include <sys/sid.h> |
| #include <sys/zfs_ctldir.h> |
| #include <sys/zfs_fuid.h> |
| #include <sys/zfs_quota.h> |
| #include <sys/zfs_sa.h> |
| #include <sys/zfs_rlock.h> |
| #include <sys/extdirent.h> |
| #include <sys/bio.h> |
| #include <sys/buf.h> |
| #include <sys/sched.h> |
| #include <sys/acl.h> |
| #include <sys/vmmeter.h> |
| #include <vm/vm_param.h> |
| #include <sys/zil.h> |
| #include <sys/zfs_vnops.h> |
| |
| #include <vm/vm_object.h> |
| |
| #include <sys/extattr.h> |
| #include <sys/priv.h> |
| |
| #ifndef VN_OPEN_INVFS |
| #define VN_OPEN_INVFS 0x0 |
| #endif |
| |
| VFS_SMR_DECLARE; |
| |
| #if __FreeBSD_version < 1300103 |
| #define NDFREE_PNBUF(ndp) NDFREE((ndp), NDF_ONLY_PNBUF) |
| #endif |
| |
| #if __FreeBSD_version >= 1300047 |
| #define vm_page_wire_lock(pp) |
| #define vm_page_wire_unlock(pp) |
| #else |
| #define vm_page_wire_lock(pp) vm_page_lock(pp) |
| #define vm_page_wire_unlock(pp) vm_page_unlock(pp) |
| #endif |
| |
| #ifdef DEBUG_VFS_LOCKS |
| #define VNCHECKREF(vp) \ |
| VNASSERT((vp)->v_holdcnt > 0 && (vp)->v_usecount > 0, vp, \ |
| ("%s: wrong ref counts", __func__)); |
| #else |
| #define VNCHECKREF(vp) |
| #endif |
| |
| #if __FreeBSD_version >= 1400045 |
| typedef uint64_t cookie_t; |
| #else |
| typedef ulong_t cookie_t; |
| #endif |
| |
| /* |
| * Programming rules. |
| * |
| * Each vnode op performs some logical unit of work. To do this, the ZPL must |
| * properly lock its in-core state, create a DMU transaction, do the work, |
| * record this work in the intent log (ZIL), commit the DMU transaction, |
| * and wait for the intent log to commit if it is a synchronous operation. |
| * Moreover, the vnode ops must work in both normal and log replay context. |
| * The ordering of events is important to avoid deadlocks and references |
| * to freed memory. The example below illustrates the following Big Rules: |
| * |
| * (1) A check must be made in each zfs thread for a mounted file system. |
| * This is done avoiding races using ZFS_ENTER(zfsvfs). |
| * A ZFS_EXIT(zfsvfs) is needed before all returns. Any znodes |
| * must be checked with ZFS_VERIFY_ZP(zp). Both of these macros |
| * can return EIO from the calling function. |
| * |
| * (2) VN_RELE() should always be the last thing except for zil_commit() |
| * (if necessary) and ZFS_EXIT(). This is for 3 reasons: |
| * First, if it's the last reference, the vnode/znode |
| * can be freed, so the zp may point to freed memory. Second, the last |
| * reference will call zfs_zinactive(), which may induce a lot of work -- |
| * pushing cached pages (which acquires range locks) and syncing out |
| * cached atime changes. Third, zfs_zinactive() may require a new tx, |
| * which could deadlock the system if you were already holding one. |
| * If you must call VN_RELE() within a tx then use VN_RELE_ASYNC(). |
| * |
| * (3) All range locks must be grabbed before calling dmu_tx_assign(), |
| * as they can span dmu_tx_assign() calls. |
| * |
| * (4) If ZPL locks are held, pass TXG_NOWAIT as the second argument to |
| * dmu_tx_assign(). This is critical because we don't want to block |
| * while holding locks. |
| * |
| * If no ZPL locks are held (aside from ZFS_ENTER()), use TXG_WAIT. This |
| * reduces lock contention and CPU usage when we must wait (note that if |
| * throughput is constrained by the storage, nearly every transaction |
| * must wait). |
| * |
| * Note, in particular, that if a lock is sometimes acquired before |
| * the tx assigns, and sometimes after (e.g. z_lock), then failing |
| * to use a non-blocking assign can deadlock the system. The scenario: |
| * |
| * Thread A has grabbed a lock before calling dmu_tx_assign(). |
| * Thread B is in an already-assigned tx, and blocks for this lock. |
| * Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open() |
| * forever, because the previous txg can't quiesce until B's tx commits. |
| * |
| * If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT, |
| * then drop all locks, call dmu_tx_wait(), and try again. On subsequent |
| * calls to dmu_tx_assign(), pass TXG_NOTHROTTLE in addition to TXG_NOWAIT, |
| * to indicate that this operation has already called dmu_tx_wait(). |
| * This will ensure that we don't retry forever, waiting a short bit |
| * each time. |
| * |
| * (5) If the operation succeeded, generate the intent log entry for it |
| * before dropping locks. This ensures that the ordering of events |
| * in the intent log matches the order in which they actually occurred. |
| * During ZIL replay the zfs_log_* functions will update the sequence |
| * number to indicate the zil transaction has replayed. |
| * |
| * (6) At the end of each vnode op, the DMU tx must always commit, |
| * regardless of whether there were any errors. |
| * |
| * (7) After dropping all locks, invoke zil_commit(zilog, foid) |
| * to ensure that synchronous semantics are provided when necessary. |
| * |
| * In general, this is how things should be ordered in each vnode op: |
| * |
| * ZFS_ENTER(zfsvfs); // exit if unmounted |
| * top: |
| * zfs_dirent_lookup(&dl, ...) // lock directory entry (may VN_HOLD()) |
| * rw_enter(...); // grab any other locks you need |
| * tx = dmu_tx_create(...); // get DMU tx |
| * dmu_tx_hold_*(); // hold each object you might modify |
| * error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT); |
| * if (error) { |
| * rw_exit(...); // drop locks |
| * zfs_dirent_unlock(dl); // unlock directory entry |
| * VN_RELE(...); // release held vnodes |
| * if (error == ERESTART) { |
| * waited = B_TRUE; |
| * dmu_tx_wait(tx); |
| * dmu_tx_abort(tx); |
| * goto top; |
| * } |
| * dmu_tx_abort(tx); // abort DMU tx |
| * ZFS_EXIT(zfsvfs); // finished in zfs |
| * return (error); // really out of space |
| * } |
| * error = do_real_work(); // do whatever this VOP does |
| * if (error == 0) |
| * zfs_log_*(...); // on success, make ZIL entry |
| * dmu_tx_commit(tx); // commit DMU tx -- error or not |
| * rw_exit(...); // drop locks |
| * zfs_dirent_unlock(dl); // unlock directory entry |
| * VN_RELE(...); // release held vnodes |
| * zil_commit(zilog, foid); // synchronous when necessary |
| * ZFS_EXIT(zfsvfs); // finished in zfs |
| * return (error); // done, report error |
| */ |
| |
| /* ARGSUSED */ |
| static int |
| zfs_open(vnode_t **vpp, int flag, cred_t *cr) |
| { |
| znode_t *zp = VTOZ(*vpp); |
| zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
| |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(zp); |
| |
| if ((flag & FWRITE) && (zp->z_pflags & ZFS_APPENDONLY) && |
| ((flag & FAPPEND) == 0)) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EPERM)); |
| } |
| |
| if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan && |
| ZTOV(zp)->v_type == VREG && |
| !(zp->z_pflags & ZFS_AV_QUARANTINED) && zp->z_size > 0) { |
| if (fs_vscan(*vpp, cr, 0) != 0) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EACCES)); |
| } |
| } |
| |
| /* Keep a count of the synchronous opens in the znode */ |
| if (flag & (FSYNC | FDSYNC)) |
| atomic_inc_32(&zp->z_sync_cnt); |
| |
| ZFS_EXIT(zfsvfs); |
| return (0); |
| } |
| |
| /* ARGSUSED */ |
| static int |
| zfs_close(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr) |
| { |
| znode_t *zp = VTOZ(vp); |
| zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
| |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(zp); |
| |
| /* Decrement the synchronous opens in the znode */ |
| if ((flag & (FSYNC | FDSYNC)) && (count == 1)) |
| atomic_dec_32(&zp->z_sync_cnt); |
| |
| if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan && |
| ZTOV(zp)->v_type == VREG && |
| !(zp->z_pflags & ZFS_AV_QUARANTINED) && zp->z_size > 0) |
| VERIFY0(fs_vscan(vp, cr, 1)); |
| |
| ZFS_EXIT(zfsvfs); |
| return (0); |
| } |
| |
| /* ARGSUSED */ |
| static int |
| zfs_ioctl(vnode_t *vp, ulong_t com, intptr_t data, int flag, cred_t *cred, |
| int *rvalp) |
| { |
| loff_t off; |
| int error; |
| |
| switch (com) { |
| case _FIOFFS: |
| { |
| return (0); |
| |
| /* |
| * The following two ioctls are used by bfu. Faking out, |
| * necessary to avoid bfu errors. |
| */ |
| } |
| case _FIOGDIO: |
| case _FIOSDIO: |
| { |
| return (0); |
| } |
| |
| case F_SEEK_DATA: |
| case F_SEEK_HOLE: |
| { |
| off = *(offset_t *)data; |
| /* offset parameter is in/out */ |
| error = zfs_holey(VTOZ(vp), com, &off); |
| if (error) |
| return (error); |
| *(offset_t *)data = off; |
| return (0); |
| } |
| } |
| return (SET_ERROR(ENOTTY)); |
| } |
| |
| static vm_page_t |
| page_busy(vnode_t *vp, int64_t start, int64_t off, int64_t nbytes) |
| { |
| vm_object_t obj; |
| vm_page_t pp; |
| int64_t end; |
| |
| /* |
| * At present vm_page_clear_dirty extends the cleared range to DEV_BSIZE |
| * aligned boundaries, if the range is not aligned. As a result a |
| * DEV_BSIZE subrange with partially dirty data may get marked as clean. |
| * It may happen that all DEV_BSIZE subranges are marked clean and thus |
| * the whole page would be considered clean despite have some |
| * dirty data. |
| * For this reason we should shrink the range to DEV_BSIZE aligned |
| * boundaries before calling vm_page_clear_dirty. |
| */ |
| end = rounddown2(off + nbytes, DEV_BSIZE); |
| off = roundup2(off, DEV_BSIZE); |
| nbytes = end - off; |
| |
| obj = vp->v_object; |
| zfs_vmobject_assert_wlocked_12(obj); |
| #if __FreeBSD_version < 1300050 |
| for (;;) { |
| if ((pp = vm_page_lookup(obj, OFF_TO_IDX(start))) != NULL && |
| pp->valid) { |
| if (vm_page_xbusied(pp)) { |
| /* |
| * Reference the page before unlocking and |
| * sleeping so that the page daemon is less |
| * likely to reclaim it. |
| */ |
| vm_page_reference(pp); |
| vm_page_lock(pp); |
| zfs_vmobject_wunlock(obj); |
| vm_page_busy_sleep(pp, "zfsmwb", true); |
| zfs_vmobject_wlock(obj); |
| continue; |
| } |
| vm_page_sbusy(pp); |
| } else if (pp != NULL) { |
| ASSERT(!pp->valid); |
| pp = NULL; |
| } |
| if (pp != NULL) { |
| ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL); |
| vm_object_pip_add(obj, 1); |
| pmap_remove_write(pp); |
| if (nbytes != 0) |
| vm_page_clear_dirty(pp, off, nbytes); |
| } |
| break; |
| } |
| #else |
| vm_page_grab_valid_unlocked(&pp, obj, OFF_TO_IDX(start), |
| VM_ALLOC_NOCREAT | VM_ALLOC_SBUSY | VM_ALLOC_NORMAL | |
| VM_ALLOC_IGN_SBUSY); |
| if (pp != NULL) { |
| ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL); |
| vm_object_pip_add(obj, 1); |
| pmap_remove_write(pp); |
| if (nbytes != 0) |
| vm_page_clear_dirty(pp, off, nbytes); |
| } |
| #endif |
| return (pp); |
| } |
| |
| static void |
| page_unbusy(vm_page_t pp) |
| { |
| |
| vm_page_sunbusy(pp); |
| #if __FreeBSD_version >= 1300041 |
| vm_object_pip_wakeup(pp->object); |
| #else |
| vm_object_pip_subtract(pp->object, 1); |
| #endif |
| } |
| |
| #if __FreeBSD_version > 1300051 |
| static vm_page_t |
| page_hold(vnode_t *vp, int64_t start) |
| { |
| vm_object_t obj; |
| vm_page_t m; |
| |
| obj = vp->v_object; |
| vm_page_grab_valid_unlocked(&m, obj, OFF_TO_IDX(start), |
| VM_ALLOC_NOCREAT | VM_ALLOC_WIRED | VM_ALLOC_IGN_SBUSY | |
| VM_ALLOC_NOBUSY); |
| return (m); |
| } |
| #else |
| static vm_page_t |
| page_hold(vnode_t *vp, int64_t start) |
| { |
| vm_object_t obj; |
| vm_page_t pp; |
| |
| obj = vp->v_object; |
| zfs_vmobject_assert_wlocked(obj); |
| |
| for (;;) { |
| if ((pp = vm_page_lookup(obj, OFF_TO_IDX(start))) != NULL && |
| pp->valid) { |
| if (vm_page_xbusied(pp)) { |
| /* |
| * Reference the page before unlocking and |
| * sleeping so that the page daemon is less |
| * likely to reclaim it. |
| */ |
| vm_page_reference(pp); |
| vm_page_lock(pp); |
| zfs_vmobject_wunlock(obj); |
| vm_page_busy_sleep(pp, "zfsmwb", true); |
| zfs_vmobject_wlock(obj); |
| continue; |
| } |
| |
| ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL); |
| vm_page_wire_lock(pp); |
| vm_page_hold(pp); |
| vm_page_wire_unlock(pp); |
| |
| } else |
| pp = NULL; |
| break; |
| } |
| return (pp); |
| } |
| #endif |
| |
| static void |
| page_unhold(vm_page_t pp) |
| { |
| |
| vm_page_wire_lock(pp); |
| #if __FreeBSD_version >= 1300035 |
| vm_page_unwire(pp, PQ_ACTIVE); |
| #else |
| vm_page_unhold(pp); |
| #endif |
| vm_page_wire_unlock(pp); |
| } |
| |
| /* |
| * When a file is memory mapped, we must keep the IO data synchronized |
| * between the DMU cache and the memory mapped pages. What this means: |
| * |
| * On Write: If we find a memory mapped page, we write to *both* |
| * the page and the dmu buffer. |
| */ |
| void |
| update_pages(znode_t *zp, int64_t start, int len, objset_t *os) |
| { |
| vm_object_t obj; |
| struct sf_buf *sf; |
| vnode_t *vp = ZTOV(zp); |
| caddr_t va; |
| int off; |
| |
| ASSERT3P(vp->v_mount, !=, NULL); |
| obj = vp->v_object; |
| ASSERT3P(obj, !=, NULL); |
| |
| off = start & PAGEOFFSET; |
| zfs_vmobject_wlock_12(obj); |
| #if __FreeBSD_version >= 1300041 |
| vm_object_pip_add(obj, 1); |
| #endif |
| for (start &= PAGEMASK; len > 0; start += PAGESIZE) { |
| vm_page_t pp; |
| int nbytes = imin(PAGESIZE - off, len); |
| |
| if ((pp = page_busy(vp, start, off, nbytes)) != NULL) { |
| zfs_vmobject_wunlock_12(obj); |
| |
| va = zfs_map_page(pp, &sf); |
| (void) dmu_read(os, zp->z_id, start + off, nbytes, |
| va + off, DMU_READ_PREFETCH); |
| zfs_unmap_page(sf); |
| |
| zfs_vmobject_wlock_12(obj); |
| page_unbusy(pp); |
| } |
| len -= nbytes; |
| off = 0; |
| } |
| #if __FreeBSD_version >= 1300041 |
| vm_object_pip_wakeup(obj); |
| #else |
| vm_object_pip_wakeupn(obj, 0); |
| #endif |
| zfs_vmobject_wunlock_12(obj); |
| } |
| |
| /* |
| * Read with UIO_NOCOPY flag means that sendfile(2) requests |
| * ZFS to populate a range of page cache pages with data. |
| * |
| * NOTE: this function could be optimized to pre-allocate |
| * all pages in advance, drain exclusive busy on all of them, |
| * map them into contiguous KVA region and populate them |
| * in one single dmu_read() call. |
| */ |
| int |
| mappedread_sf(znode_t *zp, int nbytes, zfs_uio_t *uio) |
| { |
| vnode_t *vp = ZTOV(zp); |
| objset_t *os = zp->z_zfsvfs->z_os; |
| struct sf_buf *sf; |
| vm_object_t obj; |
| vm_page_t pp; |
| int64_t start; |
| caddr_t va; |
| int len = nbytes; |
| int error = 0; |
| |
| ASSERT3U(zfs_uio_segflg(uio), ==, UIO_NOCOPY); |
| ASSERT3P(vp->v_mount, !=, NULL); |
| obj = vp->v_object; |
| ASSERT3P(obj, !=, NULL); |
| ASSERT0(zfs_uio_offset(uio) & PAGEOFFSET); |
| |
| zfs_vmobject_wlock_12(obj); |
| for (start = zfs_uio_offset(uio); len > 0; start += PAGESIZE) { |
| int bytes = MIN(PAGESIZE, len); |
| |
| pp = vm_page_grab_unlocked(obj, OFF_TO_IDX(start), |
| VM_ALLOC_SBUSY | VM_ALLOC_NORMAL | VM_ALLOC_IGN_SBUSY); |
| if (vm_page_none_valid(pp)) { |
| zfs_vmobject_wunlock_12(obj); |
| va = zfs_map_page(pp, &sf); |
| error = dmu_read(os, zp->z_id, start, bytes, va, |
| DMU_READ_PREFETCH); |
| if (bytes != PAGESIZE && error == 0) |
| bzero(va + bytes, PAGESIZE - bytes); |
| zfs_unmap_page(sf); |
| zfs_vmobject_wlock_12(obj); |
| #if __FreeBSD_version >= 1300081 |
| if (error == 0) { |
| vm_page_valid(pp); |
| vm_page_activate(pp); |
| vm_page_do_sunbusy(pp); |
| } else { |
| zfs_vmobject_wlock(obj); |
| if (!vm_page_wired(pp) && pp->valid == 0 && |
| vm_page_busy_tryupgrade(pp)) |
| vm_page_free(pp); |
| else |
| vm_page_sunbusy(pp); |
| zfs_vmobject_wunlock(obj); |
| } |
| #else |
| vm_page_do_sunbusy(pp); |
| vm_page_lock(pp); |
| if (error) { |
| if (pp->wire_count == 0 && pp->valid == 0 && |
| !vm_page_busied(pp)) |
| vm_page_free(pp); |
| } else { |
| pp->valid = VM_PAGE_BITS_ALL; |
| vm_page_activate(pp); |
| } |
| vm_page_unlock(pp); |
| #endif |
| } else { |
| ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL); |
| vm_page_do_sunbusy(pp); |
| } |
| if (error) |
| break; |
| zfs_uio_advance(uio, bytes); |
| len -= bytes; |
| } |
| zfs_vmobject_wunlock_12(obj); |
| return (error); |
| } |
| |
| /* |
| * When a file is memory mapped, we must keep the IO data synchronized |
| * between the DMU cache and the memory mapped pages. What this means: |
| * |
| * On Read: We "read" preferentially from memory mapped pages, |
| * else we default from the dmu buffer. |
| * |
| * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when |
| * the file is memory mapped. |
| */ |
| int |
| mappedread(znode_t *zp, int nbytes, zfs_uio_t *uio) |
| { |
| vnode_t *vp = ZTOV(zp); |
| vm_object_t obj; |
| int64_t start; |
| int len = nbytes; |
| int off; |
| int error = 0; |
| |
| ASSERT3P(vp->v_mount, !=, NULL); |
| obj = vp->v_object; |
| ASSERT3P(obj, !=, NULL); |
| |
| start = zfs_uio_offset(uio); |
| off = start & PAGEOFFSET; |
| zfs_vmobject_wlock_12(obj); |
| for (start &= PAGEMASK; len > 0; start += PAGESIZE) { |
| vm_page_t pp; |
| uint64_t bytes = MIN(PAGESIZE - off, len); |
| |
| if ((pp = page_hold(vp, start))) { |
| struct sf_buf *sf; |
| caddr_t va; |
| |
| zfs_vmobject_wunlock_12(obj); |
| va = zfs_map_page(pp, &sf); |
| error = vn_io_fault_uiomove(va + off, bytes, |
| GET_UIO_STRUCT(uio)); |
| zfs_unmap_page(sf); |
| zfs_vmobject_wlock_12(obj); |
| page_unhold(pp); |
| } else { |
| zfs_vmobject_wunlock_12(obj); |
| error = dmu_read_uio_dbuf(sa_get_db(zp->z_sa_hdl), |
| uio, bytes); |
| zfs_vmobject_wlock_12(obj); |
| } |
| len -= bytes; |
| off = 0; |
| if (error) |
| break; |
| } |
| zfs_vmobject_wunlock_12(obj); |
| return (error); |
| } |
| |
| int |
| zfs_write_simple(znode_t *zp, const void *data, size_t len, |
| loff_t pos, size_t *presid) |
| { |
| int error = 0; |
| ssize_t resid; |
| |
| error = vn_rdwr(UIO_WRITE, ZTOV(zp), __DECONST(void *, data), len, pos, |
| UIO_SYSSPACE, IO_SYNC, kcred, NOCRED, &resid, curthread); |
| |
| if (error) { |
| return (SET_ERROR(error)); |
| } else if (presid == NULL) { |
| if (resid != 0) { |
| error = SET_ERROR(EIO); |
| } |
| } else { |
| *presid = resid; |
| } |
| return (error); |
| } |
| |
| void |
| zfs_zrele_async(znode_t *zp) |
| { |
| vnode_t *vp = ZTOV(zp); |
| objset_t *os = ITOZSB(vp)->z_os; |
| |
| VN_RELE_ASYNC(vp, dsl_pool_zrele_taskq(dmu_objset_pool(os))); |
| } |
| |
| static int |
| zfs_dd_callback(struct mount *mp, void *arg, int lkflags, struct vnode **vpp) |
| { |
| int error; |
| |
| *vpp = arg; |
| error = vn_lock(*vpp, lkflags); |
| if (error != 0) |
| vrele(*vpp); |
| return (error); |
| } |
| |
| static int |
| zfs_lookup_lock(vnode_t *dvp, vnode_t *vp, const char *name, int lkflags) |
| { |
| znode_t *zdp = VTOZ(dvp); |
| zfsvfs_t *zfsvfs __unused = zdp->z_zfsvfs; |
| int error; |
| int ltype; |
| |
| if (zfsvfs->z_replay == B_FALSE) |
| ASSERT_VOP_LOCKED(dvp, __func__); |
| |
| if (name[0] == 0 || (name[0] == '.' && name[1] == 0)) { |
| ASSERT3P(dvp, ==, vp); |
| vref(dvp); |
| ltype = lkflags & LK_TYPE_MASK; |
| if (ltype != VOP_ISLOCKED(dvp)) { |
| if (ltype == LK_EXCLUSIVE) |
| vn_lock(dvp, LK_UPGRADE | LK_RETRY); |
| else /* if (ltype == LK_SHARED) */ |
| vn_lock(dvp, LK_DOWNGRADE | LK_RETRY); |
| |
| /* |
| * Relock for the "." case could leave us with |
| * reclaimed vnode. |
| */ |
| if (VN_IS_DOOMED(dvp)) { |
| vrele(dvp); |
| return (SET_ERROR(ENOENT)); |
| } |
| } |
| return (0); |
| } else if (name[0] == '.' && name[1] == '.' && name[2] == 0) { |
| /* |
| * Note that in this case, dvp is the child vnode, and we |
| * are looking up the parent vnode - exactly reverse from |
| * normal operation. Unlocking dvp requires some rather |
| * tricky unlock/relock dance to prevent mp from being freed; |
| * use vn_vget_ino_gen() which takes care of all that. |
| * |
| * XXX Note that there is a time window when both vnodes are |
| * unlocked. It is possible, although highly unlikely, that |
| * during that window the parent-child relationship between |
| * the vnodes may change, for example, get reversed. |
| * In that case we would have a wrong lock order for the vnodes. |
| * All other filesystems seem to ignore this problem, so we |
| * do the same here. |
| * A potential solution could be implemented as follows: |
| * - using LK_NOWAIT when locking the second vnode and retrying |
| * if necessary |
| * - checking that the parent-child relationship still holds |
| * after locking both vnodes and retrying if it doesn't |
| */ |
| error = vn_vget_ino_gen(dvp, zfs_dd_callback, vp, lkflags, &vp); |
| return (error); |
| } else { |
| error = vn_lock(vp, lkflags); |
| if (error != 0) |
| vrele(vp); |
| return (error); |
| } |
| } |
| |
| /* |
| * Lookup an entry in a directory, or an extended attribute directory. |
| * If it exists, return a held vnode reference for it. |
| * |
| * IN: dvp - vnode of directory to search. |
| * nm - name of entry to lookup. |
| * pnp - full pathname to lookup [UNUSED]. |
| * flags - LOOKUP_XATTR set if looking for an attribute. |
| * rdir - root directory vnode [UNUSED]. |
| * cr - credentials of caller. |
| * ct - caller context |
| * |
| * OUT: vpp - vnode of located entry, NULL if not found. |
| * |
| * RETURN: 0 on success, error code on failure. |
| * |
| * Timestamps: |
| * NA |
| */ |
| /* ARGSUSED */ |
| static int |
| zfs_lookup(vnode_t *dvp, const char *nm, vnode_t **vpp, |
| struct componentname *cnp, int nameiop, cred_t *cr, int flags, |
| boolean_t cached) |
| { |
| znode_t *zdp = VTOZ(dvp); |
| znode_t *zp; |
| zfsvfs_t *zfsvfs = zdp->z_zfsvfs; |
| #if __FreeBSD_version > 1300124 |
| seqc_t dvp_seqc; |
| #endif |
| int error = 0; |
| |
| /* |
| * Fast path lookup, however we must skip DNLC lookup |
| * for case folding or normalizing lookups because the |
| * DNLC code only stores the passed in name. This means |
| * creating 'a' and removing 'A' on a case insensitive |
| * file system would work, but DNLC still thinks 'a' |
| * exists and won't let you create it again on the next |
| * pass through fast path. |
| */ |
| if (!(flags & LOOKUP_XATTR)) { |
| if (dvp->v_type != VDIR) { |
| return (SET_ERROR(ENOTDIR)); |
| } else if (zdp->z_sa_hdl == NULL) { |
| return (SET_ERROR(EIO)); |
| } |
| } |
| |
| DTRACE_PROBE2(zfs__fastpath__lookup__miss, vnode_t *, dvp, |
| const char *, nm); |
| |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(zdp); |
| |
| #if __FreeBSD_version > 1300124 |
| dvp_seqc = vn_seqc_read_notmodify(dvp); |
| #endif |
| |
| *vpp = NULL; |
| |
| if (flags & LOOKUP_XATTR) { |
| /* |
| * If the xattr property is off, refuse the lookup request. |
| */ |
| if (!(zfsvfs->z_flags & ZSB_XATTR)) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EOPNOTSUPP)); |
| } |
| |
| /* |
| * We don't allow recursive attributes.. |
| * Maybe someday we will. |
| */ |
| if (zdp->z_pflags & ZFS_XATTR) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EINVAL)); |
| } |
| |
| if ((error = zfs_get_xattrdir(VTOZ(dvp), &zp, cr, flags))) { |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| *vpp = ZTOV(zp); |
| |
| /* |
| * Do we have permission to get into attribute directory? |
| */ |
| error = zfs_zaccess(zp, ACE_EXECUTE, 0, B_FALSE, cr); |
| if (error) { |
| vrele(ZTOV(zp)); |
| } |
| |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| /* |
| * Check accessibility of directory if we're not coming in via |
| * VOP_CACHEDLOOKUP. |
| */ |
| if (!cached) { |
| #ifdef NOEXECCHECK |
| if ((cnp->cn_flags & NOEXECCHECK) != 0) { |
| cnp->cn_flags &= ~NOEXECCHECK; |
| } else |
| #endif |
| if ((error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr))) { |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| } |
| |
| if (zfsvfs->z_utf8 && u8_validate(nm, strlen(nm), |
| NULL, U8_VALIDATE_ENTIRE, &error) < 0) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EILSEQ)); |
| } |
| |
| |
| /* |
| * First handle the special cases. |
| */ |
| if ((cnp->cn_flags & ISDOTDOT) != 0) { |
| /* |
| * If we are a snapshot mounted under .zfs, return |
| * the vp for the snapshot directory. |
| */ |
| if (zdp->z_id == zfsvfs->z_root && zfsvfs->z_parent != zfsvfs) { |
| struct componentname cn; |
| vnode_t *zfsctl_vp; |
| int ltype; |
| |
| ZFS_EXIT(zfsvfs); |
| ltype = VOP_ISLOCKED(dvp); |
| VOP_UNLOCK1(dvp); |
| error = zfsctl_root(zfsvfs->z_parent, LK_SHARED, |
| &zfsctl_vp); |
| if (error == 0) { |
| cn.cn_nameptr = "snapshot"; |
| cn.cn_namelen = strlen(cn.cn_nameptr); |
| cn.cn_nameiop = cnp->cn_nameiop; |
| cn.cn_flags = cnp->cn_flags & ~ISDOTDOT; |
| cn.cn_lkflags = cnp->cn_lkflags; |
| error = VOP_LOOKUP(zfsctl_vp, vpp, &cn); |
| vput(zfsctl_vp); |
| } |
| vn_lock(dvp, ltype | LK_RETRY); |
| return (error); |
| } |
| } |
| if (zfs_has_ctldir(zdp) && strcmp(nm, ZFS_CTLDIR_NAME) == 0) { |
| ZFS_EXIT(zfsvfs); |
| if ((cnp->cn_flags & ISLASTCN) != 0 && nameiop != LOOKUP) |
| return (SET_ERROR(ENOTSUP)); |
| error = zfsctl_root(zfsvfs, cnp->cn_lkflags, vpp); |
| return (error); |
| } |
| |
| /* |
| * The loop is retry the lookup if the parent-child relationship |
| * changes during the dot-dot locking complexities. |
| */ |
| for (;;) { |
| uint64_t parent; |
| |
| error = zfs_dirlook(zdp, nm, &zp); |
| if (error == 0) |
| *vpp = ZTOV(zp); |
| |
| ZFS_EXIT(zfsvfs); |
| if (error != 0) |
| break; |
| |
| error = zfs_lookup_lock(dvp, *vpp, nm, cnp->cn_lkflags); |
| if (error != 0) { |
| /* |
| * If we've got a locking error, then the vnode |
| * got reclaimed because of a force unmount. |
| * We never enter doomed vnodes into the name cache. |
| */ |
| *vpp = NULL; |
| return (error); |
| } |
| |
| if ((cnp->cn_flags & ISDOTDOT) == 0) |
| break; |
| |
| ZFS_ENTER(zfsvfs); |
| if (zdp->z_sa_hdl == NULL) { |
| error = SET_ERROR(EIO); |
| } else { |
| error = sa_lookup(zdp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs), |
| &parent, sizeof (parent)); |
| } |
| if (error != 0) { |
| ZFS_EXIT(zfsvfs); |
| vput(ZTOV(zp)); |
| break; |
| } |
| if (zp->z_id == parent) { |
| ZFS_EXIT(zfsvfs); |
| break; |
| } |
| vput(ZTOV(zp)); |
| } |
| |
| if (error != 0) |
| *vpp = NULL; |
| |
| /* Translate errors and add SAVENAME when needed. */ |
| if (cnp->cn_flags & ISLASTCN) { |
| switch (nameiop) { |
| case CREATE: |
| case RENAME: |
| if (error == ENOENT) { |
| error = EJUSTRETURN; |
| #if __FreeBSD_version < 1400068 |
| cnp->cn_flags |= SAVENAME; |
| #endif |
| break; |
| } |
| fallthrough; |
| case DELETE: |
| #if __FreeBSD_version < 1400068 |
| if (error == 0) |
| cnp->cn_flags |= SAVENAME; |
| #endif |
| break; |
| } |
| } |
| |
| #if __FreeBSD_version > 1300124 |
| if ((cnp->cn_flags & ISDOTDOT) != 0) { |
| /* |
| * FIXME: zfs_lookup_lock relocks vnodes and does nothing to |
| * handle races. In particular different callers may end up |
| * with different vnodes and will try to add conflicting |
| * entries to the namecache. |
| * |
| * While finding different result may be acceptable in face |
| * of concurrent modification, adding conflicting entries |
| * trips over an assert in the namecache. |
| * |
| * Ultimately let an entry through once everything settles. |
| */ |
| if (!vn_seqc_consistent(dvp, dvp_seqc)) { |
| cnp->cn_flags &= ~MAKEENTRY; |
| } |
| } |
| #endif |
| |
| /* Insert name into cache (as non-existent) if appropriate. */ |
| if (zfsvfs->z_use_namecache && !zfsvfs->z_replay && |
| error == ENOENT && (cnp->cn_flags & MAKEENTRY) != 0) |
| cache_enter(dvp, NULL, cnp); |
| |
| /* Insert name into cache if appropriate. */ |
| if (zfsvfs->z_use_namecache && !zfsvfs->z_replay && |
| error == 0 && (cnp->cn_flags & MAKEENTRY)) { |
| if (!(cnp->cn_flags & ISLASTCN) || |
| (nameiop != DELETE && nameiop != RENAME)) { |
| cache_enter(dvp, *vpp, cnp); |
| } |
| } |
| |
| return (error); |
| } |
| |
| /* |
| * Attempt to create a new entry in a directory. If the entry |
| * already exists, truncate the file if permissible, else return |
| * an error. Return the vp of the created or trunc'd file. |
| * |
| * IN: dvp - vnode of directory to put new file entry in. |
| * name - name of new file entry. |
| * vap - attributes of new file. |
| * excl - flag indicating exclusive or non-exclusive mode. |
| * mode - mode to open file with. |
| * cr - credentials of caller. |
| * flag - large file flag [UNUSED]. |
| * ct - caller context |
| * vsecp - ACL to be set |
| * |
| * OUT: vpp - vnode of created or trunc'd entry. |
| * |
| * RETURN: 0 on success, error code on failure. |
| * |
| * Timestamps: |
| * dvp - ctime|mtime updated if new entry created |
| * vp - ctime|mtime always, atime if new |
| */ |
| |
| /* ARGSUSED */ |
| int |
| zfs_create(znode_t *dzp, const char *name, vattr_t *vap, int excl, int mode, |
| znode_t **zpp, cred_t *cr, int flag, vsecattr_t *vsecp) |
| { |
| znode_t *zp; |
| zfsvfs_t *zfsvfs = dzp->z_zfsvfs; |
| zilog_t *zilog; |
| objset_t *os; |
| dmu_tx_t *tx; |
| int error; |
| uid_t uid = crgetuid(cr); |
| gid_t gid = crgetgid(cr); |
| uint64_t projid = ZFS_DEFAULT_PROJID; |
| zfs_acl_ids_t acl_ids; |
| boolean_t fuid_dirtied; |
| uint64_t txtype; |
| #ifdef DEBUG_VFS_LOCKS |
| vnode_t *dvp = ZTOV(dzp); |
| #endif |
| |
| /* |
| * If we have an ephemeral id, ACL, or XVATTR then |
| * make sure file system is at proper version |
| */ |
| if (zfsvfs->z_use_fuids == B_FALSE && |
| (vsecp || (vap->va_mask & AT_XVATTR) || |
| IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid))) |
| return (SET_ERROR(EINVAL)); |
| |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(dzp); |
| os = zfsvfs->z_os; |
| zilog = zfsvfs->z_log; |
| |
| if (zfsvfs->z_utf8 && u8_validate(name, strlen(name), |
| NULL, U8_VALIDATE_ENTIRE, &error) < 0) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EILSEQ)); |
| } |
| |
| if (vap->va_mask & AT_XVATTR) { |
| if ((error = secpolicy_xvattr(ZTOV(dzp), (xvattr_t *)vap, |
| crgetuid(cr), cr, vap->va_type)) != 0) { |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| } |
| |
| *zpp = NULL; |
| |
| if ((vap->va_mode & S_ISVTX) && secpolicy_vnode_stky_modify(cr)) |
| vap->va_mode &= ~S_ISVTX; |
| |
| error = zfs_dirent_lookup(dzp, name, &zp, ZNEW); |
| if (error) { |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| ASSERT3P(zp, ==, NULL); |
| |
| /* |
| * Create a new file object and update the directory |
| * to reference it. |
| */ |
| if ((error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr))) { |
| goto out; |
| } |
| |
| /* |
| * We only support the creation of regular files in |
| * extended attribute directories. |
| */ |
| |
| if ((dzp->z_pflags & ZFS_XATTR) && |
| (vap->va_type != VREG)) { |
| error = SET_ERROR(EINVAL); |
| goto out; |
| } |
| |
| if ((error = zfs_acl_ids_create(dzp, 0, vap, |
| cr, vsecp, &acl_ids)) != 0) |
| goto out; |
| |
| if (S_ISREG(vap->va_mode) || S_ISDIR(vap->va_mode)) |
| projid = zfs_inherit_projid(dzp); |
| if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, projid)) { |
| zfs_acl_ids_free(&acl_ids); |
| error = SET_ERROR(EDQUOT); |
| goto out; |
| } |
| |
| getnewvnode_reserve_(); |
| |
| tx = dmu_tx_create(os); |
| |
| dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes + |
| ZFS_SA_BASE_ATTR_SIZE); |
| |
| fuid_dirtied = zfsvfs->z_fuid_dirty; |
| if (fuid_dirtied) |
| zfs_fuid_txhold(zfsvfs, tx); |
| dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); |
| dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE); |
| if (!zfsvfs->z_use_sa && |
| acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) { |
| dmu_tx_hold_write(tx, DMU_NEW_OBJECT, |
| 0, acl_ids.z_aclp->z_acl_bytes); |
| } |
| error = dmu_tx_assign(tx, TXG_WAIT); |
| if (error) { |
| zfs_acl_ids_free(&acl_ids); |
| dmu_tx_abort(tx); |
| getnewvnode_drop_reserve(); |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids); |
| if (fuid_dirtied) |
| zfs_fuid_sync(zfsvfs, tx); |
| |
| (void) zfs_link_create(dzp, name, zp, tx, ZNEW); |
| txtype = zfs_log_create_txtype(Z_FILE, vsecp, vap); |
| zfs_log_create(zilog, tx, txtype, dzp, zp, name, |
| vsecp, acl_ids.z_fuidp, vap); |
| zfs_acl_ids_free(&acl_ids); |
| dmu_tx_commit(tx); |
| |
| getnewvnode_drop_reserve(); |
| |
| out: |
| VNCHECKREF(dvp); |
| if (error == 0) { |
| *zpp = zp; |
| } |
| |
| if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) |
| zil_commit(zilog, 0); |
| |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| /* |
| * Remove an entry from a directory. |
| * |
| * IN: dvp - vnode of directory to remove entry from. |
| * name - name of entry to remove. |
| * cr - credentials of caller. |
| * ct - caller context |
| * flags - case flags |
| * |
| * RETURN: 0 on success, error code on failure. |
| * |
| * Timestamps: |
| * dvp - ctime|mtime |
| * vp - ctime (if nlink > 0) |
| */ |
| |
| /*ARGSUSED*/ |
| static int |
| zfs_remove_(vnode_t *dvp, vnode_t *vp, const char *name, cred_t *cr) |
| { |
| znode_t *dzp = VTOZ(dvp); |
| znode_t *zp; |
| znode_t *xzp; |
| zfsvfs_t *zfsvfs = dzp->z_zfsvfs; |
| zilog_t *zilog; |
| uint64_t xattr_obj; |
| uint64_t obj = 0; |
| dmu_tx_t *tx; |
| boolean_t unlinked; |
| uint64_t txtype; |
| int error; |
| |
| |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(dzp); |
| zp = VTOZ(vp); |
| ZFS_VERIFY_ZP(zp); |
| zilog = zfsvfs->z_log; |
| |
| xattr_obj = 0; |
| xzp = NULL; |
| |
| if ((error = zfs_zaccess_delete(dzp, zp, cr))) { |
| goto out; |
| } |
| |
| /* |
| * Need to use rmdir for removing directories. |
| */ |
| if (vp->v_type == VDIR) { |
| error = SET_ERROR(EPERM); |
| goto out; |
| } |
| |
| vnevent_remove(vp, dvp, name, ct); |
| |
| obj = zp->z_id; |
| |
| /* are there any extended attributes? */ |
| error = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs), |
| &xattr_obj, sizeof (xattr_obj)); |
| if (error == 0 && xattr_obj) { |
| error = zfs_zget(zfsvfs, xattr_obj, &xzp); |
| ASSERT0(error); |
| } |
| |
| /* |
| * We may delete the znode now, or we may put it in the unlinked set; |
| * it depends on whether we're the last link, and on whether there are |
| * other holds on the vnode. So we dmu_tx_hold() the right things to |
| * allow for either case. |
| */ |
| tx = dmu_tx_create(zfsvfs->z_os); |
| dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); |
| dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); |
| zfs_sa_upgrade_txholds(tx, zp); |
| zfs_sa_upgrade_txholds(tx, dzp); |
| |
| if (xzp) { |
| dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); |
| dmu_tx_hold_sa(tx, xzp->z_sa_hdl, B_FALSE); |
| } |
| |
| /* charge as an update -- would be nice not to charge at all */ |
| dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); |
| |
| /* |
| * Mark this transaction as typically resulting in a net free of space |
| */ |
| dmu_tx_mark_netfree(tx); |
| |
| error = dmu_tx_assign(tx, TXG_WAIT); |
| if (error) { |
| dmu_tx_abort(tx); |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| /* |
| * Remove the directory entry. |
| */ |
| error = zfs_link_destroy(dzp, name, zp, tx, ZEXISTS, &unlinked); |
| |
| if (error) { |
| dmu_tx_commit(tx); |
| goto out; |
| } |
| |
| if (unlinked) { |
| zfs_unlinked_add(zp, tx); |
| vp->v_vflag |= VV_NOSYNC; |
| } |
| /* XXX check changes to linux vnops */ |
| txtype = TX_REMOVE; |
| zfs_log_remove(zilog, tx, txtype, dzp, name, obj, unlinked); |
| |
| dmu_tx_commit(tx); |
| out: |
| |
| if (xzp) |
| vrele(ZTOV(xzp)); |
| |
| if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) |
| zil_commit(zilog, 0); |
| |
| |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| |
| static int |
| zfs_lookup_internal(znode_t *dzp, const char *name, vnode_t **vpp, |
| struct componentname *cnp, int nameiop) |
| { |
| zfsvfs_t *zfsvfs = dzp->z_zfsvfs; |
| int error; |
| |
| cnp->cn_nameptr = __DECONST(char *, name); |
| cnp->cn_namelen = strlen(name); |
| cnp->cn_nameiop = nameiop; |
| cnp->cn_flags = ISLASTCN; |
| #if __FreeBSD_version < 1400068 |
| cnp->cn_flags |= SAVENAME; |
| #endif |
| cnp->cn_lkflags = LK_EXCLUSIVE | LK_RETRY; |
| cnp->cn_cred = kcred; |
| #if __FreeBSD_version < 1400037 |
| cnp->cn_thread = curthread; |
| #endif |
| |
| if (zfsvfs->z_use_namecache && !zfsvfs->z_replay) { |
| struct vop_lookup_args a; |
| |
| a.a_gen.a_desc = &vop_lookup_desc; |
| a.a_dvp = ZTOV(dzp); |
| a.a_vpp = vpp; |
| a.a_cnp = cnp; |
| error = vfs_cache_lookup(&a); |
| } else { |
| error = zfs_lookup(ZTOV(dzp), name, vpp, cnp, nameiop, kcred, 0, |
| B_FALSE); |
| } |
| #ifdef ZFS_DEBUG |
| if (error) { |
| printf("got error %d on name %s on op %d\n", error, name, |
| nameiop); |
| kdb_backtrace(); |
| } |
| #endif |
| return (error); |
| } |
| |
| int |
| zfs_remove(znode_t *dzp, const char *name, cred_t *cr, int flags) |
| { |
| vnode_t *vp; |
| int error; |
| struct componentname cn; |
| |
| if ((error = zfs_lookup_internal(dzp, name, &vp, &cn, DELETE))) |
| return (error); |
| |
| error = zfs_remove_(ZTOV(dzp), vp, name, cr); |
| vput(vp); |
| return (error); |
| } |
| /* |
| * Create a new directory and insert it into dvp using the name |
| * provided. Return a pointer to the inserted directory. |
| * |
| * IN: dvp - vnode of directory to add subdir to. |
| * dirname - name of new directory. |
| * vap - attributes of new directory. |
| * cr - credentials of caller. |
| * ct - caller context |
| * flags - case flags |
| * vsecp - ACL to be set |
| * |
| * OUT: vpp - vnode of created directory. |
| * |
| * RETURN: 0 on success, error code on failure. |
| * |
| * Timestamps: |
| * dvp - ctime|mtime updated |
| * vp - ctime|mtime|atime updated |
| */ |
| /*ARGSUSED*/ |
| int |
| zfs_mkdir(znode_t *dzp, const char *dirname, vattr_t *vap, znode_t **zpp, |
| cred_t *cr, int flags, vsecattr_t *vsecp) |
| { |
| znode_t *zp; |
| zfsvfs_t *zfsvfs = dzp->z_zfsvfs; |
| zilog_t *zilog; |
| uint64_t txtype; |
| dmu_tx_t *tx; |
| int error; |
| uid_t uid = crgetuid(cr); |
| gid_t gid = crgetgid(cr); |
| zfs_acl_ids_t acl_ids; |
| boolean_t fuid_dirtied; |
| |
| ASSERT3U(vap->va_type, ==, VDIR); |
| |
| /* |
| * If we have an ephemeral id, ACL, or XVATTR then |
| * make sure file system is at proper version |
| */ |
| if (zfsvfs->z_use_fuids == B_FALSE && |
| ((vap->va_mask & AT_XVATTR) || |
| IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid))) |
| return (SET_ERROR(EINVAL)); |
| |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(dzp); |
| zilog = zfsvfs->z_log; |
| |
| if (dzp->z_pflags & ZFS_XATTR) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EINVAL)); |
| } |
| |
| if (zfsvfs->z_utf8 && u8_validate(dirname, |
| strlen(dirname), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EILSEQ)); |
| } |
| |
| if (vap->va_mask & AT_XVATTR) { |
| if ((error = secpolicy_xvattr(ZTOV(dzp), (xvattr_t *)vap, |
| crgetuid(cr), cr, vap->va_type)) != 0) { |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| } |
| |
| if ((error = zfs_acl_ids_create(dzp, 0, vap, cr, |
| NULL, &acl_ids)) != 0) { |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| /* |
| * First make sure the new directory doesn't exist. |
| * |
| * Existence is checked first to make sure we don't return |
| * EACCES instead of EEXIST which can cause some applications |
| * to fail. |
| */ |
| *zpp = NULL; |
| |
| if ((error = zfs_dirent_lookup(dzp, dirname, &zp, ZNEW))) { |
| zfs_acl_ids_free(&acl_ids); |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| ASSERT3P(zp, ==, NULL); |
| |
| if ((error = zfs_zaccess(dzp, ACE_ADD_SUBDIRECTORY, 0, B_FALSE, cr))) { |
| zfs_acl_ids_free(&acl_ids); |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, zfs_inherit_projid(dzp))) { |
| zfs_acl_ids_free(&acl_ids); |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EDQUOT)); |
| } |
| |
| /* |
| * Add a new entry to the directory. |
| */ |
| getnewvnode_reserve_(); |
| tx = dmu_tx_create(zfsvfs->z_os); |
| dmu_tx_hold_zap(tx, dzp->z_id, TRUE, dirname); |
| dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); |
| fuid_dirtied = zfsvfs->z_fuid_dirty; |
| if (fuid_dirtied) |
| zfs_fuid_txhold(zfsvfs, tx); |
| if (!zfsvfs->z_use_sa && acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) { |
| dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, |
| acl_ids.z_aclp->z_acl_bytes); |
| } |
| |
| dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes + |
| ZFS_SA_BASE_ATTR_SIZE); |
| |
| error = dmu_tx_assign(tx, TXG_WAIT); |
| if (error) { |
| zfs_acl_ids_free(&acl_ids); |
| dmu_tx_abort(tx); |
| getnewvnode_drop_reserve(); |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| /* |
| * Create new node. |
| */ |
| zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids); |
| |
| if (fuid_dirtied) |
| zfs_fuid_sync(zfsvfs, tx); |
| |
| /* |
| * Now put new name in parent dir. |
| */ |
| (void) zfs_link_create(dzp, dirname, zp, tx, ZNEW); |
| |
| *zpp = zp; |
| |
| txtype = zfs_log_create_txtype(Z_DIR, NULL, vap); |
| zfs_log_create(zilog, tx, txtype, dzp, zp, dirname, NULL, |
| acl_ids.z_fuidp, vap); |
| |
| zfs_acl_ids_free(&acl_ids); |
| |
| dmu_tx_commit(tx); |
| |
| getnewvnode_drop_reserve(); |
| |
| if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) |
| zil_commit(zilog, 0); |
| |
| ZFS_EXIT(zfsvfs); |
| return (0); |
| } |
| |
| #if __FreeBSD_version < 1300124 |
| static void |
| cache_vop_rmdir(struct vnode *dvp, struct vnode *vp) |
| { |
| |
| cache_purge(dvp); |
| cache_purge(vp); |
| } |
| #endif |
| |
| /* |
| * Remove a directory subdir entry. If the current working |
| * directory is the same as the subdir to be removed, the |
| * remove will fail. |
| * |
| * IN: dvp - vnode of directory to remove from. |
| * name - name of directory to be removed. |
| * cwd - vnode of current working directory. |
| * cr - credentials of caller. |
| * ct - caller context |
| * flags - case flags |
| * |
| * RETURN: 0 on success, error code on failure. |
| * |
| * Timestamps: |
| * dvp - ctime|mtime updated |
| */ |
| /*ARGSUSED*/ |
| static int |
| zfs_rmdir_(vnode_t *dvp, vnode_t *vp, const char *name, cred_t *cr) |
| { |
| znode_t *dzp = VTOZ(dvp); |
| znode_t *zp = VTOZ(vp); |
| zfsvfs_t *zfsvfs = dzp->z_zfsvfs; |
| zilog_t *zilog; |
| dmu_tx_t *tx; |
| int error; |
| |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(dzp); |
| ZFS_VERIFY_ZP(zp); |
| zilog = zfsvfs->z_log; |
| |
| |
| if ((error = zfs_zaccess_delete(dzp, zp, cr))) { |
| goto out; |
| } |
| |
| if (vp->v_type != VDIR) { |
| error = SET_ERROR(ENOTDIR); |
| goto out; |
| } |
| |
| vnevent_rmdir(vp, dvp, name, ct); |
| |
| tx = dmu_tx_create(zfsvfs->z_os); |
| dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); |
| dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); |
| dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); |
| zfs_sa_upgrade_txholds(tx, zp); |
| zfs_sa_upgrade_txholds(tx, dzp); |
| dmu_tx_mark_netfree(tx); |
| error = dmu_tx_assign(tx, TXG_WAIT); |
| if (error) { |
| dmu_tx_abort(tx); |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| error = zfs_link_destroy(dzp, name, zp, tx, ZEXISTS, NULL); |
| |
| if (error == 0) { |
| uint64_t txtype = TX_RMDIR; |
| zfs_log_remove(zilog, tx, txtype, dzp, name, |
| ZFS_NO_OBJECT, B_FALSE); |
| } |
| |
| dmu_tx_commit(tx); |
| |
| cache_vop_rmdir(dvp, vp); |
| out: |
| if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) |
| zil_commit(zilog, 0); |
| |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| int |
| zfs_rmdir(znode_t *dzp, const char *name, znode_t *cwd, cred_t *cr, int flags) |
| { |
| struct componentname cn; |
| vnode_t *vp; |
| int error; |
| |
| if ((error = zfs_lookup_internal(dzp, name, &vp, &cn, DELETE))) |
| return (error); |
| |
| error = zfs_rmdir_(ZTOV(dzp), vp, name, cr); |
| vput(vp); |
| return (error); |
| } |
| |
| /* |
| * Read as many directory entries as will fit into the provided |
| * buffer from the given directory cursor position (specified in |
| * the uio structure). |
| * |
| * IN: vp - vnode of directory to read. |
| * uio - structure supplying read location, range info, |
| * and return buffer. |
| * cr - credentials of caller. |
| * ct - caller context |
| * flags - case flags |
| * |
| * OUT: uio - updated offset and range, buffer filled. |
| * eofp - set to true if end-of-file detected. |
| * |
| * RETURN: 0 on success, error code on failure. |
| * |
| * Timestamps: |
| * vp - atime updated |
| * |
| * Note that the low 4 bits of the cookie returned by zap is always zero. |
| * This allows us to use the low range for "special" directory entries: |
| * We use 0 for '.', and 1 for '..'. If this is the root of the filesystem, |
| * we use the offset 2 for the '.zfs' directory. |
| */ |
| /* ARGSUSED */ |
| static int |
| zfs_readdir(vnode_t *vp, zfs_uio_t *uio, cred_t *cr, int *eofp, |
| int *ncookies, cookie_t **cookies) |
| { |
| znode_t *zp = VTOZ(vp); |
| iovec_t *iovp; |
| edirent_t *eodp; |
| dirent64_t *odp; |
| zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
| objset_t *os; |
| caddr_t outbuf; |
| size_t bufsize; |
| zap_cursor_t zc; |
| zap_attribute_t zap; |
| uint_t bytes_wanted; |
| uint64_t offset; /* must be unsigned; checks for < 1 */ |
| uint64_t parent; |
| int local_eof; |
| int outcount; |
| int error; |
| uint8_t prefetch; |
| boolean_t check_sysattrs; |
| uint8_t type; |
| int ncooks; |
| cookie_t *cooks = NULL; |
| int flags = 0; |
| |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(zp); |
| |
| if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs), |
| &parent, sizeof (parent))) != 0) { |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| /* |
| * If we are not given an eof variable, |
| * use a local one. |
| */ |
| if (eofp == NULL) |
| eofp = &local_eof; |
| |
| /* |
| * Check for valid iov_len. |
| */ |
| if (GET_UIO_STRUCT(uio)->uio_iov->iov_len <= 0) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EINVAL)); |
| } |
| |
| /* |
| * Quit if directory has been removed (posix) |
| */ |
| if ((*eofp = zp->z_unlinked) != 0) { |
| ZFS_EXIT(zfsvfs); |
| return (0); |
| } |
| |
| error = 0; |
| os = zfsvfs->z_os; |
| offset = zfs_uio_offset(uio); |
| prefetch = zp->z_zn_prefetch; |
| |
| /* |
| * Initialize the iterator cursor. |
| */ |
| if (offset <= 3) { |
| /* |
| * Start iteration from the beginning of the directory. |
| */ |
| zap_cursor_init(&zc, os, zp->z_id); |
| } else { |
| /* |
| * The offset is a serialized cursor. |
| */ |
| zap_cursor_init_serialized(&zc, os, zp->z_id, offset); |
| } |
| |
| /* |
| * Get space to change directory entries into fs independent format. |
| */ |
| iovp = GET_UIO_STRUCT(uio)->uio_iov; |
| bytes_wanted = iovp->iov_len; |
| if (zfs_uio_segflg(uio) != UIO_SYSSPACE || zfs_uio_iovcnt(uio) != 1) { |
| bufsize = bytes_wanted; |
| outbuf = kmem_alloc(bufsize, KM_SLEEP); |
| odp = (struct dirent64 *)outbuf; |
| } else { |
| bufsize = bytes_wanted; |
| outbuf = NULL; |
| odp = (struct dirent64 *)iovp->iov_base; |
| } |
| eodp = (struct edirent *)odp; |
| |
| if (ncookies != NULL) { |
| /* |
| * Minimum entry size is dirent size and 1 byte for a file name. |
| */ |
| ncooks = zfs_uio_resid(uio) / (sizeof (struct dirent) - |
| sizeof (((struct dirent *)NULL)->d_name) + 1); |
| cooks = malloc(ncooks * sizeof (*cooks), M_TEMP, M_WAITOK); |
| *cookies = cooks; |
| *ncookies = ncooks; |
| } |
| /* |
| * If this VFS supports the system attribute view interface; and |
| * we're looking at an extended attribute directory; and we care |
| * about normalization conflicts on this vfs; then we must check |
| * for normalization conflicts with the sysattr name space. |
| */ |
| #ifdef TODO |
| check_sysattrs = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) && |
| (vp->v_flag & V_XATTRDIR) && zfsvfs->z_norm && |
| (flags & V_RDDIR_ENTFLAGS); |
| #else |
| check_sysattrs = 0; |
| #endif |
| |
| /* |
| * Transform to file-system independent format |
| */ |
| outcount = 0; |
| while (outcount < bytes_wanted) { |
| ino64_t objnum; |
| ushort_t reclen; |
| off64_t *next = NULL; |
| |
| /* |
| * Special case `.', `..', and `.zfs'. |
| */ |
| if (offset == 0) { |
| (void) strcpy(zap.za_name, "."); |
| zap.za_normalization_conflict = 0; |
| objnum = zp->z_id; |
| type = DT_DIR; |
| } else if (offset == 1) { |
| (void) strcpy(zap.za_name, ".."); |
| zap.za_normalization_conflict = 0; |
| objnum = parent; |
| type = DT_DIR; |
| } else if (offset == 2 && zfs_show_ctldir(zp)) { |
| (void) strcpy(zap.za_name, ZFS_CTLDIR_NAME); |
| zap.za_normalization_conflict = 0; |
| objnum = ZFSCTL_INO_ROOT; |
| type = DT_DIR; |
| } else { |
| /* |
| * Grab next entry. |
| */ |
| if ((error = zap_cursor_retrieve(&zc, &zap))) { |
| if ((*eofp = (error == ENOENT)) != 0) |
| break; |
| else |
| goto update; |
| } |
| |
| if (zap.za_integer_length != 8 || |
| zap.za_num_integers != 1) { |
| cmn_err(CE_WARN, "zap_readdir: bad directory " |
| "entry, obj = %lld, offset = %lld\n", |
| (u_longlong_t)zp->z_id, |
| (u_longlong_t)offset); |
| error = SET_ERROR(ENXIO); |
| goto update; |
| } |
| |
| objnum = ZFS_DIRENT_OBJ(zap.za_first_integer); |
| /* |
| * MacOS X can extract the object type here such as: |
| * uint8_t type = ZFS_DIRENT_TYPE(zap.za_first_integer); |
| */ |
| type = ZFS_DIRENT_TYPE(zap.za_first_integer); |
| |
| if (check_sysattrs && !zap.za_normalization_conflict) { |
| #ifdef TODO |
| zap.za_normalization_conflict = |
| xattr_sysattr_casechk(zap.za_name); |
| #else |
| panic("%s:%u: TODO", __func__, __LINE__); |
| #endif |
| } |
| } |
| |
| if (flags & V_RDDIR_ACCFILTER) { |
| /* |
| * If we have no access at all, don't include |
| * this entry in the returned information |
| */ |
| znode_t *ezp; |
| if (zfs_zget(zp->z_zfsvfs, objnum, &ezp) != 0) |
| goto skip_entry; |
| if (!zfs_has_access(ezp, cr)) { |
| vrele(ZTOV(ezp)); |
| goto skip_entry; |
| } |
| vrele(ZTOV(ezp)); |
| } |
| |
| if (flags & V_RDDIR_ENTFLAGS) |
| reclen = EDIRENT_RECLEN(strlen(zap.za_name)); |
| else |
| reclen = DIRENT64_RECLEN(strlen(zap.za_name)); |
| |
| /* |
| * Will this entry fit in the buffer? |
| */ |
| if (outcount + reclen > bufsize) { |
| /* |
| * Did we manage to fit anything in the buffer? |
| */ |
| if (!outcount) { |
| error = SET_ERROR(EINVAL); |
| goto update; |
| } |
| break; |
| } |
| if (flags & V_RDDIR_ENTFLAGS) { |
| /* |
| * Add extended flag entry: |
| */ |
| eodp->ed_ino = objnum; |
| eodp->ed_reclen = reclen; |
| /* NOTE: ed_off is the offset for the *next* entry */ |
| next = &(eodp->ed_off); |
| eodp->ed_eflags = zap.za_normalization_conflict ? |
| ED_CASE_CONFLICT : 0; |
| (void) strncpy(eodp->ed_name, zap.za_name, |
| EDIRENT_NAMELEN(reclen)); |
| eodp = (edirent_t *)((intptr_t)eodp + reclen); |
| } else { |
| /* |
| * Add normal entry: |
| */ |
| odp->d_ino = objnum; |
| odp->d_reclen = reclen; |
| odp->d_namlen = strlen(zap.za_name); |
| /* NOTE: d_off is the offset for the *next* entry. */ |
| next = &odp->d_off; |
| strlcpy(odp->d_name, zap.za_name, odp->d_namlen + 1); |
| odp->d_type = type; |
| dirent_terminate(odp); |
| odp = (dirent64_t *)((intptr_t)odp + reclen); |
| } |
| outcount += reclen; |
| |
| ASSERT3S(outcount, <=, bufsize); |
| |
| /* Prefetch znode */ |
| if (prefetch) |
| dmu_prefetch(os, objnum, 0, 0, 0, |
| ZIO_PRIORITY_SYNC_READ); |
| |
| skip_entry: |
| /* |
| * Move to the next entry, fill in the previous offset. |
| */ |
| if (offset > 2 || (offset == 2 && !zfs_show_ctldir(zp))) { |
| zap_cursor_advance(&zc); |
| offset = zap_cursor_serialize(&zc); |
| } else { |
| offset += 1; |
| } |
| |
| /* Fill the offset right after advancing the cursor. */ |
| if (next != NULL) |
| *next = offset; |
| if (cooks != NULL) { |
| *cooks++ = offset; |
| ncooks--; |
| KASSERT(ncooks >= 0, ("ncookies=%d", ncooks)); |
| } |
| } |
| zp->z_zn_prefetch = B_FALSE; /* a lookup will re-enable pre-fetching */ |
| |
| /* Subtract unused cookies */ |
| if (ncookies != NULL) |
| *ncookies -= ncooks; |
| |
| if (zfs_uio_segflg(uio) == UIO_SYSSPACE && zfs_uio_iovcnt(uio) == 1) { |
| iovp->iov_base += outcount; |
| iovp->iov_len -= outcount; |
| zfs_uio_resid(uio) -= outcount; |
| } else if ((error = |
| zfs_uiomove(outbuf, (long)outcount, UIO_READ, uio))) { |
| /* |
| * Reset the pointer. |
| */ |
| offset = zfs_uio_offset(uio); |
| } |
| |
| update: |
| zap_cursor_fini(&zc); |
| if (zfs_uio_segflg(uio) != UIO_SYSSPACE || zfs_uio_iovcnt(uio) != 1) |
| kmem_free(outbuf, bufsize); |
| |
| if (error == ENOENT) |
| error = 0; |
| |
| ZFS_ACCESSTIME_STAMP(zfsvfs, zp); |
| |
| zfs_uio_setoffset(uio, offset); |
| ZFS_EXIT(zfsvfs); |
| if (error != 0 && cookies != NULL) { |
| free(*cookies, M_TEMP); |
| *cookies = NULL; |
| *ncookies = 0; |
| } |
| return (error); |
| } |
| |
| /* |
| * Get the requested file attributes and place them in the provided |
| * vattr structure. |
| * |
| * IN: vp - vnode of file. |
| * vap - va_mask identifies requested attributes. |
| * If AT_XVATTR set, then optional attrs are requested |
| * flags - ATTR_NOACLCHECK (CIFS server context) |
| * cr - credentials of caller. |
| * |
| * OUT: vap - attribute values. |
| * |
| * RETURN: 0 (always succeeds). |
| */ |
| /* ARGSUSED */ |
| static int |
| zfs_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr) |
| { |
| znode_t *zp = VTOZ(vp); |
| zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
| int error = 0; |
| uint32_t blksize; |
| u_longlong_t nblocks; |
| uint64_t mtime[2], ctime[2], crtime[2], rdev; |
| xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */ |
| xoptattr_t *xoap = NULL; |
| boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; |
| sa_bulk_attr_t bulk[4]; |
| int count = 0; |
| |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(zp); |
| |
| zfs_fuid_map_ids(zp, cr, &vap->va_uid, &vap->va_gid); |
| |
| SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16); |
| SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16); |
| SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL, &crtime, 16); |
| if (vp->v_type == VBLK || vp->v_type == VCHR) |
| SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zfsvfs), NULL, |
| &rdev, 8); |
| |
| if ((error = sa_bulk_lookup(zp->z_sa_hdl, bulk, count)) != 0) { |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| /* |
| * If ACL is trivial don't bother looking for ACE_READ_ATTRIBUTES. |
| * Also, if we are the owner don't bother, since owner should |
| * always be allowed to read basic attributes of file. |
| */ |
| if (!(zp->z_pflags & ZFS_ACL_TRIVIAL) && |
| (vap->va_uid != crgetuid(cr))) { |
| if ((error = zfs_zaccess(zp, ACE_READ_ATTRIBUTES, 0, |
| skipaclchk, cr))) { |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| } |
| |
| /* |
| * Return all attributes. It's cheaper to provide the answer |
| * than to determine whether we were asked the question. |
| */ |
| |
| vap->va_type = IFTOVT(zp->z_mode); |
| vap->va_mode = zp->z_mode & ~S_IFMT; |
| vn_fsid(vp, vap); |
| vap->va_nodeid = zp->z_id; |
| vap->va_nlink = zp->z_links; |
| if ((vp->v_flag & VROOT) && zfs_show_ctldir(zp) && |
| zp->z_links < ZFS_LINK_MAX) |
| vap->va_nlink++; |
| vap->va_size = zp->z_size; |
| if (vp->v_type == VBLK || vp->v_type == VCHR) |
| vap->va_rdev = zfs_cmpldev(rdev); |
| vap->va_gen = zp->z_gen; |
| vap->va_flags = 0; /* FreeBSD: Reset chflags(2) flags. */ |
| vap->va_filerev = zp->z_seq; |
| |
| /* |
| * Add in any requested optional attributes and the create time. |
| * Also set the corresponding bits in the returned attribute bitmap. |
| */ |
| if ((xoap = xva_getxoptattr(xvap)) != NULL && zfsvfs->z_use_fuids) { |
| if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) { |
| xoap->xoa_archive = |
| ((zp->z_pflags & ZFS_ARCHIVE) != 0); |
| XVA_SET_RTN(xvap, XAT_ARCHIVE); |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_READONLY)) { |
| xoap->xoa_readonly = |
| ((zp->z_pflags & ZFS_READONLY) != 0); |
| XVA_SET_RTN(xvap, XAT_READONLY); |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) { |
| xoap->xoa_system = |
| ((zp->z_pflags & ZFS_SYSTEM) != 0); |
| XVA_SET_RTN(xvap, XAT_SYSTEM); |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) { |
| xoap->xoa_hidden = |
| ((zp->z_pflags & ZFS_HIDDEN) != 0); |
| XVA_SET_RTN(xvap, XAT_HIDDEN); |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { |
| xoap->xoa_nounlink = |
| ((zp->z_pflags & ZFS_NOUNLINK) != 0); |
| XVA_SET_RTN(xvap, XAT_NOUNLINK); |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { |
| xoap->xoa_immutable = |
| ((zp->z_pflags & ZFS_IMMUTABLE) != 0); |
| XVA_SET_RTN(xvap, XAT_IMMUTABLE); |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { |
| xoap->xoa_appendonly = |
| ((zp->z_pflags & ZFS_APPENDONLY) != 0); |
| XVA_SET_RTN(xvap, XAT_APPENDONLY); |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { |
| xoap->xoa_nodump = |
| ((zp->z_pflags & ZFS_NODUMP) != 0); |
| XVA_SET_RTN(xvap, XAT_NODUMP); |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) { |
| xoap->xoa_opaque = |
| ((zp->z_pflags & ZFS_OPAQUE) != 0); |
| XVA_SET_RTN(xvap, XAT_OPAQUE); |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { |
| xoap->xoa_av_quarantined = |
| ((zp->z_pflags & ZFS_AV_QUARANTINED) != 0); |
| XVA_SET_RTN(xvap, XAT_AV_QUARANTINED); |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { |
| xoap->xoa_av_modified = |
| ((zp->z_pflags & ZFS_AV_MODIFIED) != 0); |
| XVA_SET_RTN(xvap, XAT_AV_MODIFIED); |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) && |
| vp->v_type == VREG) { |
| zfs_sa_get_scanstamp(zp, xvap); |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) { |
| xoap->xoa_reparse = ((zp->z_pflags & ZFS_REPARSE) != 0); |
| XVA_SET_RTN(xvap, XAT_REPARSE); |
| } |
| if (XVA_ISSET_REQ(xvap, XAT_GEN)) { |
| xoap->xoa_generation = zp->z_gen; |
| XVA_SET_RTN(xvap, XAT_GEN); |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_OFFLINE)) { |
| xoap->xoa_offline = |
| ((zp->z_pflags & ZFS_OFFLINE) != 0); |
| XVA_SET_RTN(xvap, XAT_OFFLINE); |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_SPARSE)) { |
| xoap->xoa_sparse = |
| ((zp->z_pflags & ZFS_SPARSE) != 0); |
| XVA_SET_RTN(xvap, XAT_SPARSE); |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_PROJINHERIT)) { |
| xoap->xoa_projinherit = |
| ((zp->z_pflags & ZFS_PROJINHERIT) != 0); |
| XVA_SET_RTN(xvap, XAT_PROJINHERIT); |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_PROJID)) { |
| xoap->xoa_projid = zp->z_projid; |
| XVA_SET_RTN(xvap, XAT_PROJID); |
| } |
| } |
| |
| ZFS_TIME_DECODE(&vap->va_atime, zp->z_atime); |
| ZFS_TIME_DECODE(&vap->va_mtime, mtime); |
| ZFS_TIME_DECODE(&vap->va_ctime, ctime); |
| ZFS_TIME_DECODE(&vap->va_birthtime, crtime); |
| |
| |
| sa_object_size(zp->z_sa_hdl, &blksize, &nblocks); |
| vap->va_blksize = blksize; |
| vap->va_bytes = nblocks << 9; /* nblocks * 512 */ |
| |
| if (zp->z_blksz == 0) { |
| /* |
| * Block size hasn't been set; suggest maximal I/O transfers. |
| */ |
| vap->va_blksize = zfsvfs->z_max_blksz; |
| } |
| |
| ZFS_EXIT(zfsvfs); |
| return (0); |
| } |
| |
| /* |
| * Set the file attributes to the values contained in the |
| * vattr structure. |
| * |
| * IN: zp - znode of file to be modified. |
| * vap - new attribute values. |
| * If AT_XVATTR set, then optional attrs are being set |
| * flags - ATTR_UTIME set if non-default time values provided. |
| * - ATTR_NOACLCHECK (CIFS context only). |
| * cr - credentials of caller. |
| * ct - caller context |
| * |
| * RETURN: 0 on success, error code on failure. |
| * |
| * Timestamps: |
| * vp - ctime updated, mtime updated if size changed. |
| */ |
| /* ARGSUSED */ |
| int |
| zfs_setattr(znode_t *zp, vattr_t *vap, int flags, cred_t *cr) |
| { |
| vnode_t *vp = ZTOV(zp); |
| zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
| objset_t *os; |
| zilog_t *zilog; |
| dmu_tx_t *tx; |
| vattr_t oldva; |
| xvattr_t tmpxvattr; |
| uint_t mask = vap->va_mask; |
| uint_t saved_mask = 0; |
| uint64_t saved_mode; |
| int trim_mask = 0; |
| uint64_t new_mode; |
| uint64_t new_uid, new_gid; |
| uint64_t xattr_obj; |
| uint64_t mtime[2], ctime[2]; |
| uint64_t projid = ZFS_INVALID_PROJID; |
| znode_t *attrzp; |
| int need_policy = FALSE; |
| int err, err2; |
| zfs_fuid_info_t *fuidp = NULL; |
| xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */ |
| xoptattr_t *xoap; |
| zfs_acl_t *aclp; |
| boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; |
| boolean_t fuid_dirtied = B_FALSE; |
| sa_bulk_attr_t bulk[7], xattr_bulk[7]; |
| int count = 0, xattr_count = 0; |
| |
| if (mask == 0) |
| return (0); |
| |
| if (mask & AT_NOSET) |
| return (SET_ERROR(EINVAL)); |
| |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(zp); |
| |
| os = zfsvfs->z_os; |
| zilog = zfsvfs->z_log; |
| |
| /* |
| * Make sure that if we have ephemeral uid/gid or xvattr specified |
| * that file system is at proper version level |
| */ |
| |
| if (zfsvfs->z_use_fuids == B_FALSE && |
| (((mask & AT_UID) && IS_EPHEMERAL(vap->va_uid)) || |
| ((mask & AT_GID) && IS_EPHEMERAL(vap->va_gid)) || |
| (mask & AT_XVATTR))) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EINVAL)); |
| } |
| |
| if (mask & AT_SIZE && vp->v_type == VDIR) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EISDIR)); |
| } |
| |
| if (mask & AT_SIZE && vp->v_type != VREG && vp->v_type != VFIFO) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EINVAL)); |
| } |
| |
| /* |
| * If this is an xvattr_t, then get a pointer to the structure of |
| * optional attributes. If this is NULL, then we have a vattr_t. |
| */ |
| xoap = xva_getxoptattr(xvap); |
| |
| xva_init(&tmpxvattr); |
| |
| /* |
| * Immutable files can only alter immutable bit and atime |
| */ |
| if ((zp->z_pflags & ZFS_IMMUTABLE) && |
| ((mask & (AT_SIZE|AT_UID|AT_GID|AT_MTIME|AT_MODE)) || |
| ((mask & AT_XVATTR) && XVA_ISSET_REQ(xvap, XAT_CREATETIME)))) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EPERM)); |
| } |
| |
| /* |
| * Note: ZFS_READONLY is handled in zfs_zaccess_common. |
| */ |
| |
| /* |
| * Verify timestamps doesn't overflow 32 bits. |
| * ZFS can handle large timestamps, but 32bit syscalls can't |
| * handle times greater than 2039. This check should be removed |
| * once large timestamps are fully supported. |
| */ |
| if (mask & (AT_ATIME | AT_MTIME)) { |
| if (((mask & AT_ATIME) && TIMESPEC_OVERFLOW(&vap->va_atime)) || |
| ((mask & AT_MTIME) && TIMESPEC_OVERFLOW(&vap->va_mtime))) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EOVERFLOW)); |
| } |
| } |
| if (xoap != NULL && (mask & AT_XVATTR)) { |
| if (XVA_ISSET_REQ(xvap, XAT_CREATETIME) && |
| TIMESPEC_OVERFLOW(&vap->va_birthtime)) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EOVERFLOW)); |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_PROJID)) { |
| if (!dmu_objset_projectquota_enabled(os) || |
| (!S_ISREG(zp->z_mode) && !S_ISDIR(zp->z_mode))) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EOPNOTSUPP)); |
| } |
| |
| projid = xoap->xoa_projid; |
| if (unlikely(projid == ZFS_INVALID_PROJID)) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EINVAL)); |
| } |
| |
| if (projid == zp->z_projid && zp->z_pflags & ZFS_PROJID) |
| projid = ZFS_INVALID_PROJID; |
| else |
| need_policy = TRUE; |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_PROJINHERIT) && |
| (xoap->xoa_projinherit != |
| ((zp->z_pflags & ZFS_PROJINHERIT) != 0)) && |
| (!dmu_objset_projectquota_enabled(os) || |
| (!S_ISREG(zp->z_mode) && !S_ISDIR(zp->z_mode)))) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EOPNOTSUPP)); |
| } |
| } |
| |
| attrzp = NULL; |
| aclp = NULL; |
| |
| if (zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EROFS)); |
| } |
| |
| /* |
| * First validate permissions |
| */ |
| |
| if (mask & AT_SIZE) { |
| /* |
| * XXX - Note, we are not providing any open |
| * mode flags here (like FNDELAY), so we may |
| * block if there are locks present... this |
| * should be addressed in openat(). |
| */ |
| /* XXX - would it be OK to generate a log record here? */ |
| err = zfs_freesp(zp, vap->va_size, 0, 0, FALSE); |
| if (err) { |
| ZFS_EXIT(zfsvfs); |
| return (err); |
| } |
| } |
| |
| if (mask & (AT_ATIME|AT_MTIME) || |
| ((mask & AT_XVATTR) && (XVA_ISSET_REQ(xvap, XAT_HIDDEN) || |
| XVA_ISSET_REQ(xvap, XAT_READONLY) || |
| XVA_ISSET_REQ(xvap, XAT_ARCHIVE) || |
| XVA_ISSET_REQ(xvap, XAT_OFFLINE) || |
| XVA_ISSET_REQ(xvap, XAT_SPARSE) || |
| XVA_ISSET_REQ(xvap, XAT_CREATETIME) || |
| XVA_ISSET_REQ(xvap, XAT_SYSTEM)))) { |
| need_policy = zfs_zaccess(zp, ACE_WRITE_ATTRIBUTES, 0, |
| skipaclchk, cr); |
| } |
| |
| if (mask & (AT_UID|AT_GID)) { |
| int idmask = (mask & (AT_UID|AT_GID)); |
| int take_owner; |
| int take_group; |
| |
| /* |
| * NOTE: even if a new mode is being set, |
| * we may clear S_ISUID/S_ISGID bits. |
| */ |
| |
| if (!(mask & AT_MODE)) |
| vap->va_mode = zp->z_mode; |
| |
| /* |
| * Take ownership or chgrp to group we are a member of |
| */ |
| |
| take_owner = (mask & AT_UID) && (vap->va_uid == crgetuid(cr)); |
| take_group = (mask & AT_GID) && |
| zfs_groupmember(zfsvfs, vap->va_gid, cr); |
| |
| /* |
| * If both AT_UID and AT_GID are set then take_owner and |
| * take_group must both be set in order to allow taking |
| * ownership. |
| * |
| * Otherwise, send the check through secpolicy_vnode_setattr() |
| * |
| */ |
| |
| if (((idmask == (AT_UID|AT_GID)) && take_owner && take_group) || |
| ((idmask == AT_UID) && take_owner) || |
| ((idmask == AT_GID) && take_group)) { |
| if (zfs_zaccess(zp, ACE_WRITE_OWNER, 0, |
| skipaclchk, cr) == 0) { |
| /* |
| * Remove setuid/setgid for non-privileged users |
| */ |
| secpolicy_setid_clear(vap, vp, cr); |
| trim_mask = (mask & (AT_UID|AT_GID)); |
| } else { |
| need_policy = TRUE; |
| } |
| } else { |
| need_policy = TRUE; |
| } |
| } |
| |
| oldva.va_mode = zp->z_mode; |
| zfs_fuid_map_ids(zp, cr, &oldva.va_uid, &oldva.va_gid); |
| if (mask & AT_XVATTR) { |
| /* |
| * Update xvattr mask to include only those attributes |
| * that are actually changing. |
| * |
| * the bits will be restored prior to actually setting |
| * the attributes so the caller thinks they were set. |
| */ |
| if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { |
| if (xoap->xoa_appendonly != |
| ((zp->z_pflags & ZFS_APPENDONLY) != 0)) { |
| need_policy = TRUE; |
| } else { |
| XVA_CLR_REQ(xvap, XAT_APPENDONLY); |
| XVA_SET_REQ(&tmpxvattr, XAT_APPENDONLY); |
| } |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_PROJINHERIT)) { |
| if (xoap->xoa_projinherit != |
| ((zp->z_pflags & ZFS_PROJINHERIT) != 0)) { |
| need_policy = TRUE; |
| } else { |
| XVA_CLR_REQ(xvap, XAT_PROJINHERIT); |
| XVA_SET_REQ(&tmpxvattr, XAT_PROJINHERIT); |
| } |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { |
| if (xoap->xoa_nounlink != |
| ((zp->z_pflags & ZFS_NOUNLINK) != 0)) { |
| need_policy = TRUE; |
| } else { |
| XVA_CLR_REQ(xvap, XAT_NOUNLINK); |
| XVA_SET_REQ(&tmpxvattr, XAT_NOUNLINK); |
| } |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { |
| if (xoap->xoa_immutable != |
| ((zp->z_pflags & ZFS_IMMUTABLE) != 0)) { |
| need_policy = TRUE; |
| } else { |
| XVA_CLR_REQ(xvap, XAT_IMMUTABLE); |
| XVA_SET_REQ(&tmpxvattr, XAT_IMMUTABLE); |
| } |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { |
| if (xoap->xoa_nodump != |
| ((zp->z_pflags & ZFS_NODUMP) != 0)) { |
| need_policy = TRUE; |
| } else { |
| XVA_CLR_REQ(xvap, XAT_NODUMP); |
| XVA_SET_REQ(&tmpxvattr, XAT_NODUMP); |
| } |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { |
| if (xoap->xoa_av_modified != |
| ((zp->z_pflags & ZFS_AV_MODIFIED) != 0)) { |
| need_policy = TRUE; |
| } else { |
| XVA_CLR_REQ(xvap, XAT_AV_MODIFIED); |
| XVA_SET_REQ(&tmpxvattr, XAT_AV_MODIFIED); |
| } |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { |
| if ((vp->v_type != VREG && |
| xoap->xoa_av_quarantined) || |
| xoap->xoa_av_quarantined != |
| ((zp->z_pflags & ZFS_AV_QUARANTINED) != 0)) { |
| need_policy = TRUE; |
| } else { |
| XVA_CLR_REQ(xvap, XAT_AV_QUARANTINED); |
| XVA_SET_REQ(&tmpxvattr, XAT_AV_QUARANTINED); |
| } |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EPERM)); |
| } |
| |
| if (need_policy == FALSE && |
| (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) || |
| XVA_ISSET_REQ(xvap, XAT_OPAQUE))) { |
| need_policy = TRUE; |
| } |
| } |
| |
| if (mask & AT_MODE) { |
| if (zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr) == 0) { |
| err = secpolicy_setid_setsticky_clear(vp, vap, |
| &oldva, cr); |
| if (err) { |
| ZFS_EXIT(zfsvfs); |
| return (err); |
| } |
| trim_mask |= AT_MODE; |
| } else { |
| need_policy = TRUE; |
| } |
| } |
| |
| if (need_policy) { |
| /* |
| * If trim_mask is set then take ownership |
| * has been granted or write_acl is present and user |
| * has the ability to modify mode. In that case remove |
| * UID|GID and or MODE from mask so that |
| * secpolicy_vnode_setattr() doesn't revoke it. |
| */ |
| |
| if (trim_mask) { |
| saved_mask = vap->va_mask; |
| vap->va_mask &= ~trim_mask; |
| if (trim_mask & AT_MODE) { |
| /* |
| * Save the mode, as secpolicy_vnode_setattr() |
| * will overwrite it with ova.va_mode. |
| */ |
| saved_mode = vap->va_mode; |
| } |
| } |
| err = secpolicy_vnode_setattr(cr, vp, vap, &oldva, flags, |
| (int (*)(void *, int, cred_t *))zfs_zaccess_unix, zp); |
| if (err) { |
| ZFS_EXIT(zfsvfs); |
| return (err); |
| } |
| |
| if (trim_mask) { |
| vap->va_mask |= saved_mask; |
| if (trim_mask & AT_MODE) { |
| /* |
| * Recover the mode after |
| * secpolicy_vnode_setattr(). |
| */ |
| vap->va_mode = saved_mode; |
| } |
| } |
| } |
| |
| /* |
| * secpolicy_vnode_setattr, or take ownership may have |
| * changed va_mask |
| */ |
| mask = vap->va_mask; |
| |
| if ((mask & (AT_UID | AT_GID)) || projid != ZFS_INVALID_PROJID) { |
| err = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs), |
| &xattr_obj, sizeof (xattr_obj)); |
| |
| if (err == 0 && xattr_obj) { |
| err = zfs_zget(zp->z_zfsvfs, xattr_obj, &attrzp); |
| if (err == 0) { |
| err = vn_lock(ZTOV(attrzp), LK_EXCLUSIVE); |
| if (err != 0) |
| vrele(ZTOV(attrzp)); |
| } |
| if (err) |
| goto out2; |
| } |
| if (mask & AT_UID) { |
| new_uid = zfs_fuid_create(zfsvfs, |
| (uint64_t)vap->va_uid, cr, ZFS_OWNER, &fuidp); |
| if (new_uid != zp->z_uid && |
| zfs_id_overquota(zfsvfs, DMU_USERUSED_OBJECT, |
| new_uid)) { |
| if (attrzp) |
| vput(ZTOV(attrzp)); |
| err = SET_ERROR(EDQUOT); |
| goto out2; |
| } |
| } |
| |
| if (mask & AT_GID) { |
| new_gid = zfs_fuid_create(zfsvfs, (uint64_t)vap->va_gid, |
| cr, ZFS_GROUP, &fuidp); |
| if (new_gid != zp->z_gid && |
| zfs_id_overquota(zfsvfs, DMU_GROUPUSED_OBJECT, |
| new_gid)) { |
| if (attrzp) |
| vput(ZTOV(attrzp)); |
| err = SET_ERROR(EDQUOT); |
| goto out2; |
| } |
| } |
| |
| if (projid != ZFS_INVALID_PROJID && |
| zfs_id_overquota(zfsvfs, DMU_PROJECTUSED_OBJECT, projid)) { |
| if (attrzp) |
| vput(ZTOV(attrzp)); |
| err = SET_ERROR(EDQUOT); |
| goto out2; |
| } |
| } |
| tx = dmu_tx_create(os); |
| |
| if (mask & AT_MODE) { |
| uint64_t pmode = zp->z_mode; |
| uint64_t acl_obj; |
| new_mode = (pmode & S_IFMT) | (vap->va_mode & ~S_IFMT); |
| |
| if (zp->z_zfsvfs->z_acl_mode == ZFS_ACL_RESTRICTED && |
| !(zp->z_pflags & ZFS_ACL_TRIVIAL)) { |
| err = SET_ERROR(EPERM); |
| goto out; |
| } |
| |
| if ((err = zfs_acl_chmod_setattr(zp, &aclp, new_mode))) |
| goto out; |
| |
| if (!zp->z_is_sa && ((acl_obj = zfs_external_acl(zp)) != 0)) { |
| /* |
| * Are we upgrading ACL from old V0 format |
| * to V1 format? |
| */ |
| if (zfsvfs->z_version >= ZPL_VERSION_FUID && |
| zfs_znode_acl_version(zp) == |
| ZFS_ACL_VERSION_INITIAL) { |
| dmu_tx_hold_free(tx, acl_obj, 0, |
| DMU_OBJECT_END); |
| dmu_tx_hold_write(tx, DMU_NEW_OBJECT, |
| 0, aclp->z_acl_bytes); |
| } else { |
| dmu_tx_hold_write(tx, acl_obj, 0, |
| aclp->z_acl_bytes); |
| } |
| } else if (!zp->z_is_sa && aclp->z_acl_bytes > ZFS_ACE_SPACE) { |
| dmu_tx_hold_write(tx, DMU_NEW_OBJECT, |
| 0, aclp->z_acl_bytes); |
| } |
| dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); |
| } else { |
| if (((mask & AT_XVATTR) && |
| XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) || |
| (projid != ZFS_INVALID_PROJID && |
| !(zp->z_pflags & ZFS_PROJID))) |
| dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); |
| else |
| dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); |
| } |
| |
| if (attrzp) { |
| dmu_tx_hold_sa(tx, attrzp->z_sa_hdl, B_FALSE); |
| } |
| |
| fuid_dirtied = zfsvfs->z_fuid_dirty; |
| if (fuid_dirtied) |
| zfs_fuid_txhold(zfsvfs, tx); |
| |
| zfs_sa_upgrade_txholds(tx, zp); |
| |
| err = dmu_tx_assign(tx, TXG_WAIT); |
| if (err) |
| goto out; |
| |
| count = 0; |
| /* |
| * Set each attribute requested. |
| * We group settings according to the locks they need to acquire. |
| * |
| * Note: you cannot set ctime directly, although it will be |
| * updated as a side-effect of calling this function. |
| */ |
| |
| if (projid != ZFS_INVALID_PROJID && !(zp->z_pflags & ZFS_PROJID)) { |
| /* |
| * For the existed object that is upgraded from old system, |
| * its on-disk layout has no slot for the project ID attribute. |
| * But quota accounting logic needs to access related slots by |
| * offset directly. So we need to adjust old objects' layout |
| * to make the project ID to some unified and fixed offset. |
| */ |
| if (attrzp) |
| err = sa_add_projid(attrzp->z_sa_hdl, tx, projid); |
| if (err == 0) |
| err = sa_add_projid(zp->z_sa_hdl, tx, projid); |
| |
| if (unlikely(err == EEXIST)) |
| err = 0; |
| else if (err != 0) |
| goto out; |
| else |
| projid = ZFS_INVALID_PROJID; |
| } |
| |
| if (mask & (AT_UID|AT_GID|AT_MODE)) |
| mutex_enter(&zp->z_acl_lock); |
| |
| SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL, |
| &zp->z_pflags, sizeof (zp->z_pflags)); |
| |
| if (attrzp) { |
| if (mask & (AT_UID|AT_GID|AT_MODE)) |
| mutex_enter(&attrzp->z_acl_lock); |
| SA_ADD_BULK_ATTR(xattr_bulk, xattr_count, |
| SA_ZPL_FLAGS(zfsvfs), NULL, &attrzp->z_pflags, |
| sizeof (attrzp->z_pflags)); |
| if (projid != ZFS_INVALID_PROJID) { |
| attrzp->z_projid = projid; |
| SA_ADD_BULK_ATTR(xattr_bulk, xattr_count, |
| SA_ZPL_PROJID(zfsvfs), NULL, &attrzp->z_projid, |
| sizeof (attrzp->z_projid)); |
| } |
| } |
| |
| if (mask & (AT_UID|AT_GID)) { |
| |
| if (mask & AT_UID) { |
| SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL, |
| &new_uid, sizeof (new_uid)); |
| zp->z_uid = new_uid; |
| if (attrzp) { |
| SA_ADD_BULK_ATTR(xattr_bulk, xattr_count, |
| SA_ZPL_UID(zfsvfs), NULL, &new_uid, |
| sizeof (new_uid)); |
| attrzp->z_uid = new_uid; |
| } |
| } |
| |
| if (mask & AT_GID) { |
| SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), |
| NULL, &new_gid, sizeof (new_gid)); |
| zp->z_gid = new_gid; |
| if (attrzp) { |
| SA_ADD_BULK_ATTR(xattr_bulk, xattr_count, |
| SA_ZPL_GID(zfsvfs), NULL, &new_gid, |
| sizeof (new_gid)); |
| attrzp->z_gid = new_gid; |
| } |
| } |
| if (!(mask & AT_MODE)) { |
| SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), |
| NULL, &new_mode, sizeof (new_mode)); |
| new_mode = zp->z_mode; |
| } |
| err = zfs_acl_chown_setattr(zp); |
| ASSERT0(err); |
| if (attrzp) { |
| vn_seqc_write_begin(ZTOV(attrzp)); |
| err = zfs_acl_chown_setattr(attrzp); |
| vn_seqc_write_end(ZTOV(attrzp)); |
| ASSERT0(err); |
| } |
| } |
| |
| if (mask & AT_MODE) { |
| SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, |
| &new_mode, sizeof (new_mode)); |
| zp->z_mode = new_mode; |
| ASSERT3P(aclp, !=, NULL); |
| err = zfs_aclset_common(zp, aclp, cr, tx); |
| ASSERT0(err); |
| if (zp->z_acl_cached) |
| zfs_acl_free(zp->z_acl_cached); |
| zp->z_acl_cached = aclp; |
| aclp = NULL; |
| } |
| |
| |
| if (mask & AT_ATIME) { |
| ZFS_TIME_ENCODE(&vap->va_atime, zp->z_atime); |
| SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL, |
| &zp->z_atime, sizeof (zp->z_atime)); |
| } |
| |
| if (mask & AT_MTIME) { |
| ZFS_TIME_ENCODE(&vap->va_mtime, mtime); |
| SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, |
| mtime, sizeof (mtime)); |
| } |
| |
| if (projid != ZFS_INVALID_PROJID) { |
| zp->z_projid = projid; |
| SA_ADD_BULK_ATTR(bulk, count, |
| SA_ZPL_PROJID(zfsvfs), NULL, &zp->z_projid, |
| sizeof (zp->z_projid)); |
| } |
| |
| /* XXX - shouldn't this be done *before* the ATIME/MTIME checks? */ |
| if (mask & AT_SIZE && !(mask & AT_MTIME)) { |
| SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), |
| NULL, mtime, sizeof (mtime)); |
| SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, |
| &ctime, sizeof (ctime)); |
| zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime); |
| } else if (mask != 0) { |
| SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, |
| &ctime, sizeof (ctime)); |
| zfs_tstamp_update_setup(zp, STATE_CHANGED, mtime, ctime); |
| if (attrzp) { |
| SA_ADD_BULK_ATTR(xattr_bulk, xattr_count, |
| SA_ZPL_CTIME(zfsvfs), NULL, |
| &ctime, sizeof (ctime)); |
| zfs_tstamp_update_setup(attrzp, STATE_CHANGED, |
| mtime, ctime); |
| } |
| } |
| |
| /* |
| * Do this after setting timestamps to prevent timestamp |
| * update from toggling bit |
| */ |
| |
| if (xoap && (mask & AT_XVATTR)) { |
| |
| if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) |
| xoap->xoa_createtime = vap->va_birthtime; |
| /* |
| * restore trimmed off masks |
| * so that return masks can be set for caller. |
| */ |
| |
| if (XVA_ISSET_REQ(&tmpxvattr, XAT_APPENDONLY)) { |
| XVA_SET_REQ(xvap, XAT_APPENDONLY); |
| } |
| if (XVA_ISSET_REQ(&tmpxvattr, XAT_NOUNLINK)) { |
| XVA_SET_REQ(xvap, XAT_NOUNLINK); |
| } |
| if (XVA_ISSET_REQ(&tmpxvattr, XAT_IMMUTABLE)) { |
| XVA_SET_REQ(xvap, XAT_IMMUTABLE); |
| } |
| if (XVA_ISSET_REQ(&tmpxvattr, XAT_NODUMP)) { |
| XVA_SET_REQ(xvap, XAT_NODUMP); |
| } |
| if (XVA_ISSET_REQ(&tmpxvattr, XAT_AV_MODIFIED)) { |
| XVA_SET_REQ(xvap, XAT_AV_MODIFIED); |
| } |
| if (XVA_ISSET_REQ(&tmpxvattr, XAT_AV_QUARANTINED)) { |
| XVA_SET_REQ(xvap, XAT_AV_QUARANTINED); |
| } |
| if (XVA_ISSET_REQ(&tmpxvattr, XAT_PROJINHERIT)) { |
| XVA_SET_REQ(xvap, XAT_PROJINHERIT); |
| } |
| |
| if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) |
| ASSERT3S(vp->v_type, ==, VREG); |
| |
| zfs_xvattr_set(zp, xvap, tx); |
| } |
| |
| if (fuid_dirtied) |
| zfs_fuid_sync(zfsvfs, tx); |
| |
| if (mask != 0) |
| zfs_log_setattr(zilog, tx, TX_SETATTR, zp, vap, mask, fuidp); |
| |
| if (mask & (AT_UID|AT_GID|AT_MODE)) |
| mutex_exit(&zp->z_acl_lock); |
| |
| if (attrzp) { |
| if (mask & (AT_UID|AT_GID|AT_MODE)) |
| mutex_exit(&attrzp->z_acl_lock); |
| } |
| out: |
| if (err == 0 && attrzp) { |
| err2 = sa_bulk_update(attrzp->z_sa_hdl, xattr_bulk, |
| xattr_count, tx); |
| ASSERT0(err2); |
| } |
| |
| if (attrzp) |
| vput(ZTOV(attrzp)); |
| |
| if (aclp) |
| zfs_acl_free(aclp); |
| |
| if (fuidp) { |
| zfs_fuid_info_free(fuidp); |
| fuidp = NULL; |
| } |
| |
| if (err) { |
| dmu_tx_abort(tx); |
| } else { |
| err2 = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx); |
| dmu_tx_commit(tx); |
| } |
| |
| out2: |
| if (os->os_sync == ZFS_SYNC_ALWAYS) |
| zil_commit(zilog, 0); |
| |
| ZFS_EXIT(zfsvfs); |
| return (err); |
| } |
| |
| /* |
| * Look up the directory entries corresponding to the source and target |
| * directory/name pairs. |
| */ |
| static int |
| zfs_rename_relock_lookup(znode_t *sdzp, const struct componentname *scnp, |
| znode_t **szpp, znode_t *tdzp, const struct componentname *tcnp, |
| znode_t **tzpp) |
| { |
| zfsvfs_t *zfsvfs; |
| znode_t *szp, *tzp; |
| int error; |
| |
| /* |
| * Before using sdzp and tdzp we must ensure that they are live. |
| * As a porting legacy from illumos we have two things to worry |
| * about. One is typical for FreeBSD and it is that the vnode is |
| * not reclaimed (doomed). The other is that the znode is live. |
| * The current code can invalidate the znode without acquiring the |
| * corresponding vnode lock if the object represented by the znode |
| * and vnode is no longer valid after a rollback or receive operation. |
| * z_teardown_lock hidden behind ZFS_ENTER and ZFS_EXIT is the lock |
| * that protects the znodes from the invalidation. |
| */ |
| zfsvfs = sdzp->z_zfsvfs; |
| ASSERT3P(zfsvfs, ==, tdzp->z_zfsvfs); |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(sdzp); |
| ZFS_VERIFY_ZP(tdzp); |
| |
| /* |
| * Re-resolve svp to be certain it still exists and fetch the |
| * correct vnode. |
| */ |
| error = zfs_dirent_lookup(sdzp, scnp->cn_nameptr, &szp, ZEXISTS); |
| if (error != 0) { |
| /* Source entry invalid or not there. */ |
| if ((scnp->cn_flags & ISDOTDOT) != 0 || |
| (scnp->cn_namelen == 1 && scnp->cn_nameptr[0] == '.')) |
| error = SET_ERROR(EINVAL); |
| goto out; |
| } |
| *szpp = szp; |
| |
| /* |
| * Re-resolve tvp, if it disappeared we just carry on. |
| */ |
| error = zfs_dirent_lookup(tdzp, tcnp->cn_nameptr, &tzp, 0); |
| if (error != 0) { |
| vrele(ZTOV(szp)); |
| if ((tcnp->cn_flags & ISDOTDOT) != 0) |
| error = SET_ERROR(EINVAL); |
| goto out; |
| } |
| *tzpp = tzp; |
| out: |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| /* |
| * We acquire all but fdvp locks using non-blocking acquisitions. If we |
| * fail to acquire any lock in the path we will drop all held locks, |
| * acquire the new lock in a blocking fashion, and then release it and |
| * restart the rename. This acquire/release step ensures that we do not |
| * spin on a lock waiting for release. On error release all vnode locks |
| * and decrement references the way tmpfs_rename() would do. |
| */ |
| static int |
| zfs_rename_relock(struct vnode *sdvp, struct vnode **svpp, |
| struct vnode *tdvp, struct vnode **tvpp, |
| const struct componentname *scnp, const struct componentname *tcnp) |
| { |
| struct vnode *nvp, *svp, *tvp; |
| znode_t *sdzp, *tdzp, *szp, *tzp; |
| int error; |
| |
| VOP_UNLOCK1(tdvp); |
| if (*tvpp != NULL && *tvpp != tdvp) |
| VOP_UNLOCK1(*tvpp); |
| |
| relock: |
| error = vn_lock(sdvp, LK_EXCLUSIVE); |
| if (error) |
| goto out; |
| error = vn_lock(tdvp, LK_EXCLUSIVE | LK_NOWAIT); |
| if (error != 0) { |
| VOP_UNLOCK1(sdvp); |
| if (error != EBUSY) |
| goto out; |
| error = vn_lock(tdvp, LK_EXCLUSIVE); |
| if (error) |
| goto out; |
| VOP_UNLOCK1(tdvp); |
| goto relock; |
| } |
| tdzp = VTOZ(tdvp); |
| sdzp = VTOZ(sdvp); |
| |
| error = zfs_rename_relock_lookup(sdzp, scnp, &szp, tdzp, tcnp, &tzp); |
| if (error != 0) { |
| VOP_UNLOCK1(sdvp); |
| VOP_UNLOCK1(tdvp); |
| goto out; |
| } |
| svp = ZTOV(szp); |
| tvp = tzp != NULL ? ZTOV(tzp) : NULL; |
| |
| /* |
| * Now try acquire locks on svp and tvp. |
| */ |
| nvp = svp; |
| error = vn_lock(nvp, LK_EXCLUSIVE | LK_NOWAIT); |
| if (error != 0) { |
| VOP_UNLOCK1(sdvp); |
| VOP_UNLOCK1(tdvp); |
| if (tvp != NULL) |
| vrele(tvp); |
| if (error != EBUSY) { |
| vrele(nvp); |
| goto out; |
| } |
| error = vn_lock(nvp, LK_EXCLUSIVE); |
| if (error != 0) { |
| vrele(nvp); |
| goto out; |
| } |
| VOP_UNLOCK1(nvp); |
| /* |
| * Concurrent rename race. |
| * XXX ? |
| */ |
| if (nvp == tdvp) { |
| vrele(nvp); |
| error = SET_ERROR(EINVAL); |
| goto out; |
| } |
| vrele(*svpp); |
| *svpp = nvp; |
| goto relock; |
| } |
| vrele(*svpp); |
| *svpp = nvp; |
| |
| if (*tvpp != NULL) |
| vrele(*tvpp); |
| *tvpp = NULL; |
| if (tvp != NULL) { |
| nvp = tvp; |
| error = vn_lock(nvp, LK_EXCLUSIVE | LK_NOWAIT); |
| if (error != 0) { |
| VOP_UNLOCK1(sdvp); |
| VOP_UNLOCK1(tdvp); |
| VOP_UNLOCK1(*svpp); |
| if (error != EBUSY) { |
| vrele(nvp); |
| goto out; |
| } |
| error = vn_lock(nvp, LK_EXCLUSIVE); |
| if (error != 0) { |
| vrele(nvp); |
| goto out; |
| } |
| vput(nvp); |
| goto relock; |
| } |
| *tvpp = nvp; |
| } |
| |
| return (0); |
| |
| out: |
| return (error); |
| } |
| |
| /* |
| * Note that we must use VRELE_ASYNC in this function as it walks |
| * up the directory tree and vrele may need to acquire an exclusive |
| * lock if a last reference to a vnode is dropped. |
| */ |
| static int |
| zfs_rename_check(znode_t *szp, znode_t *sdzp, znode_t *tdzp) |
| { |
| zfsvfs_t *zfsvfs; |
| znode_t *zp, *zp1; |
| uint64_t parent; |
| int error; |
| |
| zfsvfs = tdzp->z_zfsvfs; |
| if (tdzp == szp) |
| return (SET_ERROR(EINVAL)); |
| if (tdzp == sdzp) |
| return (0); |
| if (tdzp->z_id == zfsvfs->z_root) |
| return (0); |
| zp = tdzp; |
| for (;;) { |
| ASSERT(!zp->z_unlinked); |
| if ((error = sa_lookup(zp->z_sa_hdl, |
| SA_ZPL_PARENT(zfsvfs), &parent, sizeof (parent))) != 0) |
| break; |
| |
| if (parent == szp->z_id) { |
| error = SET_ERROR(EINVAL); |
| break; |
| } |
| if (parent == zfsvfs->z_root) |
| break; |
| if (parent == sdzp->z_id) |
| break; |
| |
| error = zfs_zget(zfsvfs, parent, &zp1); |
| if (error != 0) |
| break; |
| |
| if (zp != tdzp) |
| VN_RELE_ASYNC(ZTOV(zp), |
| dsl_pool_zrele_taskq( |
| dmu_objset_pool(zfsvfs->z_os))); |
| zp = zp1; |
| } |
| |
| if (error == ENOTDIR) |
| panic("checkpath: .. not a directory\n"); |
| if (zp != tdzp) |
| VN_RELE_ASYNC(ZTOV(zp), |
| dsl_pool_zrele_taskq(dmu_objset_pool(zfsvfs->z_os))); |
| return (error); |
| } |
| |
| #if __FreeBSD_version < 1300124 |
| static void |
| cache_vop_rename(struct vnode *fdvp, struct vnode *fvp, struct vnode *tdvp, |
| struct vnode *tvp, struct componentname *fcnp, struct componentname *tcnp) |
| { |
| |
| cache_purge(fvp); |
| if (tvp != NULL) |
| cache_purge(tvp); |
| cache_purge_negative(tdvp); |
| } |
| #endif |
| |
| static int |
| zfs_do_rename_impl(vnode_t *sdvp, vnode_t **svpp, struct componentname *scnp, |
| vnode_t *tdvp, vnode_t **tvpp, struct componentname *tcnp, |
| cred_t *cr); |
| |
| /* |
| * Move an entry from the provided source directory to the target |
| * directory. Change the entry name as indicated. |
| * |
| * IN: sdvp - Source directory containing the "old entry". |
| * scnp - Old entry name. |
| * tdvp - Target directory to contain the "new entry". |
| * tcnp - New entry name. |
| * cr - credentials of caller. |
| * INOUT: svpp - Source file |
| * tvpp - Target file, may point to NULL initially |
| * |
| * RETURN: 0 on success, error code on failure. |
| * |
| * Timestamps: |
| * sdvp,tdvp - ctime|mtime updated |
| */ |
| /*ARGSUSED*/ |
| static int |
| zfs_do_rename(vnode_t *sdvp, vnode_t **svpp, struct componentname *scnp, |
| vnode_t *tdvp, vnode_t **tvpp, struct componentname *tcnp, |
| cred_t *cr) |
| { |
| int error; |
| |
| ASSERT_VOP_ELOCKED(tdvp, __func__); |
| if (*tvpp != NULL) |
| ASSERT_VOP_ELOCKED(*tvpp, __func__); |
| |
| /* Reject renames across filesystems. */ |
| if ((*svpp)->v_mount != tdvp->v_mount || |
| ((*tvpp) != NULL && (*svpp)->v_mount != (*tvpp)->v_mount)) { |
| error = SET_ERROR(EXDEV); |
| goto out; |
| } |
| |
| if (zfsctl_is_node(tdvp)) { |
| error = SET_ERROR(EXDEV); |
| goto out; |
| } |
| |
| /* |
| * Lock all four vnodes to ensure safety and semantics of renaming. |
| */ |
| error = zfs_rename_relock(sdvp, svpp, tdvp, tvpp, scnp, tcnp); |
| if (error != 0) { |
| /* no vnodes are locked in the case of error here */ |
| return (error); |
| } |
| |
| error = zfs_do_rename_impl(sdvp, svpp, scnp, tdvp, tvpp, tcnp, cr); |
| VOP_UNLOCK1(sdvp); |
| VOP_UNLOCK1(*svpp); |
| out: |
| if (*tvpp != NULL) |
| VOP_UNLOCK1(*tvpp); |
| if (tdvp != *tvpp) |
| VOP_UNLOCK1(tdvp); |
| |
| return (error); |
| } |
| |
| static int |
| zfs_do_rename_impl(vnode_t *sdvp, vnode_t **svpp, struct componentname *scnp, |
| vnode_t *tdvp, vnode_t **tvpp, struct componentname *tcnp, |
| cred_t *cr) |
| { |
| dmu_tx_t *tx; |
| zfsvfs_t *zfsvfs; |
| zilog_t *zilog; |
| znode_t *tdzp, *sdzp, *tzp, *szp; |
| const char *snm = scnp->cn_nameptr; |
| const char *tnm = tcnp->cn_nameptr; |
| int error; |
| |
| tdzp = VTOZ(tdvp); |
| sdzp = VTOZ(sdvp); |
| zfsvfs = tdzp->z_zfsvfs; |
| |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(tdzp); |
| ZFS_VERIFY_ZP(sdzp); |
| zilog = zfsvfs->z_log; |
| |
| if (zfsvfs->z_utf8 && u8_validate(tnm, |
| strlen(tnm), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { |
| error = SET_ERROR(EILSEQ); |
| goto out; |
| } |
| |
| /* If source and target are the same file, there is nothing to do. */ |
| if ((*svpp) == (*tvpp)) { |
| error = 0; |
| goto out; |
| } |
| |
| if (((*svpp)->v_type == VDIR && (*svpp)->v_mountedhere != NULL) || |
| ((*tvpp) != NULL && (*tvpp)->v_type == VDIR && |
| (*tvpp)->v_mountedhere != NULL)) { |
| error = SET_ERROR(EXDEV); |
| goto out; |
| } |
| |
| szp = VTOZ(*svpp); |
| ZFS_VERIFY_ZP(szp); |
| tzp = *tvpp == NULL ? NULL : VTOZ(*tvpp); |
| if (tzp != NULL) |
| ZFS_VERIFY_ZP(tzp); |
| |
| /* |
| * This is to prevent the creation of links into attribute space |
| * by renaming a linked file into/outof an attribute directory. |
| * See the comment in zfs_link() for why this is considered bad. |
| */ |
| if ((tdzp->z_pflags & ZFS_XATTR) != (sdzp->z_pflags & ZFS_XATTR)) { |
| error = SET_ERROR(EINVAL); |
| goto out; |
| } |
| |
| /* |
| * If we are using project inheritance, means if the directory has |
| * ZFS_PROJINHERIT set, then its descendant directories will inherit |
| * not only the project ID, but also the ZFS_PROJINHERIT flag. Under |
| * such case, we only allow renames into our tree when the project |
| * IDs are the same. |
| */ |
| if (tdzp->z_pflags & ZFS_PROJINHERIT && |
| tdzp->z_projid != szp->z_projid) { |
| error = SET_ERROR(EXDEV); |
| goto out; |
| } |
| |
| /* |
| * Must have write access at the source to remove the old entry |
| * and write access at the target to create the new entry. |
| * Note that if target and source are the same, this can be |
| * done in a single check. |
| */ |
| if ((error = zfs_zaccess_rename(sdzp, szp, tdzp, tzp, cr))) |
| goto out; |
| |
| if ((*svpp)->v_type == VDIR) { |
| /* |
| * Avoid ".", "..", and aliases of "." for obvious reasons. |
| */ |
| if ((scnp->cn_namelen == 1 && scnp->cn_nameptr[0] == '.') || |
| sdzp == szp || |
| (scnp->cn_flags | tcnp->cn_flags) & ISDOTDOT) { |
| error = EINVAL; |
| goto out; |
| } |
| |
| /* |
| * Check to make sure rename is valid. |
| * Can't do a move like this: /usr/a/b to /usr/a/b/c/d |
| */ |
| if ((error = zfs_rename_check(szp, sdzp, tdzp))) |
| goto out; |
| } |
| |
| /* |
| * Does target exist? |
| */ |
| if (tzp) { |
| /* |
| * Source and target must be the same type. |
| */ |
| if ((*svpp)->v_type == VDIR) { |
| if ((*tvpp)->v_type != VDIR) { |
| error = SET_ERROR(ENOTDIR); |
| goto out; |
| } else { |
| cache_purge(tdvp); |
| if (sdvp != tdvp) |
| cache_purge(sdvp); |
| } |
| } else { |
| if ((*tvpp)->v_type == VDIR) { |
| error = SET_ERROR(EISDIR); |
| goto out; |
| } |
| } |
| } |
| |
| vn_seqc_write_begin(*svpp); |
| vn_seqc_write_begin(sdvp); |
| if (*tvpp != NULL) |
| vn_seqc_write_begin(*tvpp); |
| if (tdvp != *tvpp) |
| vn_seqc_write_begin(tdvp); |
| |
| vnevent_rename_src(*svpp, sdvp, scnp->cn_nameptr, ct); |
| if (tzp) |
| vnevent_rename_dest(*tvpp, tdvp, tnm, ct); |
| |
| /* |
| * notify the target directory if it is not the same |
| * as source directory. |
| */ |
| if (tdvp != sdvp) { |
| vnevent_rename_dest_dir(tdvp, ct); |
| } |
| |
| tx = dmu_tx_create(zfsvfs->z_os); |
| dmu_tx_hold_sa(tx, szp->z_sa_hdl, B_FALSE); |
| dmu_tx_hold_sa(tx, sdzp->z_sa_hdl, B_FALSE); |
| dmu_tx_hold_zap(tx, sdzp->z_id, FALSE, snm); |
| dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, tnm); |
| if (sdzp != tdzp) { |
| dmu_tx_hold_sa(tx, tdzp->z_sa_hdl, B_FALSE); |
| zfs_sa_upgrade_txholds(tx, tdzp); |
| } |
| if (tzp) { |
| dmu_tx_hold_sa(tx, tzp->z_sa_hdl, B_FALSE); |
| zfs_sa_upgrade_txholds(tx, tzp); |
| } |
| |
| zfs_sa_upgrade_txholds(tx, szp); |
| dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); |
| error = dmu_tx_assign(tx, TXG_WAIT); |
| if (error) { |
| dmu_tx_abort(tx); |
| goto out_seq; |
| } |
| |
| if (tzp) /* Attempt to remove the existing target */ |
| error = zfs_link_destroy(tdzp, tnm, tzp, tx, 0, NULL); |
| |
| if (error == 0) { |
| error = zfs_link_create(tdzp, tnm, szp, tx, ZRENAMING); |
| if (error == 0) { |
| szp->z_pflags |= ZFS_AV_MODIFIED; |
| |
| error = sa_update(szp->z_sa_hdl, SA_ZPL_FLAGS(zfsvfs), |
| (void *)&szp->z_pflags, sizeof (uint64_t), tx); |
| ASSERT0(error); |
| |
| error = zfs_link_destroy(sdzp, snm, szp, tx, ZRENAMING, |
| NULL); |
| if (error == 0) { |
| zfs_log_rename(zilog, tx, TX_RENAME, sdzp, |
| snm, tdzp, tnm, szp); |
| |
| /* |
| * Update path information for the target vnode |
| */ |
| vn_renamepath(tdvp, *svpp, tnm, strlen(tnm)); |
| } else { |
| /* |
| * At this point, we have successfully created |
| * the target name, but have failed to remove |
| * the source name. Since the create was done |
| * with the ZRENAMING flag, there are |
| * complications; for one, the link count is |
| * wrong. The easiest way to deal with this |
| * is to remove the newly created target, and |
| * return the original error. This must |
| * succeed; fortunately, it is very unlikely to |
| * fail, since we just created it. |
| */ |
| VERIFY0(zfs_link_destroy(tdzp, tnm, szp, tx, |
| ZRENAMING, NULL)); |
| } |
| } |
| if (error == 0) { |
| cache_vop_rename(sdvp, *svpp, tdvp, *tvpp, scnp, tcnp); |
| } |
| } |
| |
| dmu_tx_commit(tx); |
| |
| out_seq: |
| vn_seqc_write_end(*svpp); |
| vn_seqc_write_end(sdvp); |
| if (*tvpp != NULL) |
| vn_seqc_write_end(*tvpp); |
| if (tdvp != *tvpp) |
| vn_seqc_write_end(tdvp); |
| |
| out: |
| if (error == 0 && zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) |
| zil_commit(zilog, 0); |
| ZFS_EXIT(zfsvfs); |
| |
| return (error); |
| } |
| |
| int |
| zfs_rename(znode_t *sdzp, const char *sname, znode_t *tdzp, const char *tname, |
| cred_t *cr, int flags) |
| { |
| struct componentname scn, tcn; |
| vnode_t *sdvp, *tdvp; |
| vnode_t *svp, *tvp; |
| int error; |
| svp = tvp = NULL; |
| |
| sdvp = ZTOV(sdzp); |
| tdvp = ZTOV(tdzp); |
| error = zfs_lookup_internal(sdzp, sname, &svp, &scn, DELETE); |
| if (sdzp->z_zfsvfs->z_replay == B_FALSE) |
| VOP_UNLOCK1(sdvp); |
| if (error != 0) |
| goto fail; |
| VOP_UNLOCK1(svp); |
| |
| vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY); |
| error = zfs_lookup_internal(tdzp, tname, &tvp, &tcn, RENAME); |
| if (error == EJUSTRETURN) |
| tvp = NULL; |
| else if (error != 0) { |
| VOP_UNLOCK1(tdvp); |
| goto fail; |
| } |
| |
| error = zfs_do_rename(sdvp, &svp, &scn, tdvp, &tvp, &tcn, cr); |
| fail: |
| if (svp != NULL) |
| vrele(svp); |
| if (tvp != NULL) |
| vrele(tvp); |
| |
| return (error); |
| } |
| |
| /* |
| * Insert the indicated symbolic reference entry into the directory. |
| * |
| * IN: dvp - Directory to contain new symbolic link. |
| * link - Name for new symlink entry. |
| * vap - Attributes of new entry. |
| * cr - credentials of caller. |
| * ct - caller context |
| * flags - case flags |
| * |
| * RETURN: 0 on success, error code on failure. |
| * |
| * Timestamps: |
| * dvp - ctime|mtime updated |
| */ |
| /*ARGSUSED*/ |
| int |
| zfs_symlink(znode_t *dzp, const char *name, vattr_t *vap, |
| const char *link, znode_t **zpp, cred_t *cr, int flags) |
| { |
| znode_t *zp; |
| dmu_tx_t *tx; |
| zfsvfs_t *zfsvfs = dzp->z_zfsvfs; |
| zilog_t *zilog; |
| uint64_t len = strlen(link); |
| int error; |
| zfs_acl_ids_t acl_ids; |
| boolean_t fuid_dirtied; |
| uint64_t txtype = TX_SYMLINK; |
| |
| ASSERT3S(vap->va_type, ==, VLNK); |
| |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(dzp); |
| zilog = zfsvfs->z_log; |
| |
| if (zfsvfs->z_utf8 && u8_validate(name, strlen(name), |
| NULL, U8_VALIDATE_ENTIRE, &error) < 0) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EILSEQ)); |
| } |
| |
| if (len > MAXPATHLEN) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(ENAMETOOLONG)); |
| } |
| |
| if ((error = zfs_acl_ids_create(dzp, 0, |
| vap, cr, NULL, &acl_ids)) != 0) { |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| /* |
| * Attempt to lock directory; fail if entry already exists. |
| */ |
| error = zfs_dirent_lookup(dzp, name, &zp, ZNEW); |
| if (error) { |
| zfs_acl_ids_free(&acl_ids); |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| if ((error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr))) { |
| zfs_acl_ids_free(&acl_ids); |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, |
| 0 /* projid */)) { |
| zfs_acl_ids_free(&acl_ids); |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EDQUOT)); |
| } |
| |
| getnewvnode_reserve_(); |
| tx = dmu_tx_create(zfsvfs->z_os); |
| fuid_dirtied = zfsvfs->z_fuid_dirty; |
| dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, MAX(1, len)); |
| dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); |
| dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes + |
| ZFS_SA_BASE_ATTR_SIZE + len); |
| dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE); |
| if (!zfsvfs->z_use_sa && acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) { |
| dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, |
| acl_ids.z_aclp->z_acl_bytes); |
| } |
| if (fuid_dirtied) |
| zfs_fuid_txhold(zfsvfs, tx); |
| error = dmu_tx_assign(tx, TXG_WAIT); |
| if (error) { |
| zfs_acl_ids_free(&acl_ids); |
| dmu_tx_abort(tx); |
| getnewvnode_drop_reserve(); |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| /* |
| * Create a new object for the symlink. |
| * for version 4 ZPL datasets the symlink will be an SA attribute |
| */ |
| zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids); |
| |
| if (fuid_dirtied) |
| zfs_fuid_sync(zfsvfs, tx); |
| |
| if (zp->z_is_sa) |
| error = sa_update(zp->z_sa_hdl, SA_ZPL_SYMLINK(zfsvfs), |
| __DECONST(void *, link), len, tx); |
| else |
| zfs_sa_symlink(zp, __DECONST(char *, link), len, tx); |
| |
| zp->z_size = len; |
| (void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs), |
| &zp->z_size, sizeof (zp->z_size), tx); |
| /* |
| * Insert the new object into the directory. |
| */ |
| (void) zfs_link_create(dzp, name, zp, tx, ZNEW); |
| |
| zfs_log_symlink(zilog, tx, txtype, dzp, zp, name, link); |
| *zpp = zp; |
| |
| zfs_acl_ids_free(&acl_ids); |
| |
| dmu_tx_commit(tx); |
| |
| getnewvnode_drop_reserve(); |
| |
| if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) |
| zil_commit(zilog, 0); |
| |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| /* |
| * Return, in the buffer contained in the provided uio structure, |
| * the symbolic path referred to by vp. |
| * |
| * IN: vp - vnode of symbolic link. |
| * uio - structure to contain the link path. |
| * cr - credentials of caller. |
| * ct - caller context |
| * |
| * OUT: uio - structure containing the link path. |
| * |
| * RETURN: 0 on success, error code on failure. |
| * |
| * Timestamps: |
| * vp - atime updated |
| */ |
| /* ARGSUSED */ |
| static int |
| zfs_readlink(vnode_t *vp, zfs_uio_t *uio, cred_t *cr, caller_context_t *ct) |
| { |
| znode_t *zp = VTOZ(vp); |
| zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
| int error; |
| |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(zp); |
| |
| if (zp->z_is_sa) |
| error = sa_lookup_uio(zp->z_sa_hdl, |
| SA_ZPL_SYMLINK(zfsvfs), uio); |
| else |
| error = zfs_sa_readlink(zp, uio); |
| |
| ZFS_ACCESSTIME_STAMP(zfsvfs, zp); |
| |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| /* |
| * Insert a new entry into directory tdvp referencing svp. |
| * |
| * IN: tdvp - Directory to contain new entry. |
| * svp - vnode of new entry. |
| * name - name of new entry. |
| * cr - credentials of caller. |
| * |
| * RETURN: 0 on success, error code on failure. |
| * |
| * Timestamps: |
| * tdvp - ctime|mtime updated |
| * svp - ctime updated |
| */ |
| /* ARGSUSED */ |
| int |
| zfs_link(znode_t *tdzp, znode_t *szp, const char *name, cred_t *cr, |
| int flags) |
| { |
| znode_t *tzp; |
| zfsvfs_t *zfsvfs = tdzp->z_zfsvfs; |
| zilog_t *zilog; |
| dmu_tx_t *tx; |
| int error; |
| uint64_t parent; |
| uid_t owner; |
| |
| ASSERT3S(ZTOV(tdzp)->v_type, ==, VDIR); |
| |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(tdzp); |
| zilog = zfsvfs->z_log; |
| |
| /* |
| * POSIX dictates that we return EPERM here. |
| * Better choices include ENOTSUP or EISDIR. |
| */ |
| if (ZTOV(szp)->v_type == VDIR) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EPERM)); |
| } |
| |
| ZFS_VERIFY_ZP(szp); |
| |
| /* |
| * If we are using project inheritance, means if the directory has |
| * ZFS_PROJINHERIT set, then its descendant directories will inherit |
| * not only the project ID, but also the ZFS_PROJINHERIT flag. Under |
| * such case, we only allow hard link creation in our tree when the |
| * project IDs are the same. |
| */ |
| if (tdzp->z_pflags & ZFS_PROJINHERIT && |
| tdzp->z_projid != szp->z_projid) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EXDEV)); |
| } |
| |
| if (szp->z_pflags & (ZFS_APPENDONLY | |
| ZFS_IMMUTABLE | ZFS_READONLY)) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EPERM)); |
| } |
| |
| /* Prevent links to .zfs/shares files */ |
| |
| if ((error = sa_lookup(szp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs), |
| &parent, sizeof (uint64_t))) != 0) { |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| if (parent == zfsvfs->z_shares_dir) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EPERM)); |
| } |
| |
| if (zfsvfs->z_utf8 && u8_validate(name, |
| strlen(name), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EILSEQ)); |
| } |
| |
| /* |
| * We do not support links between attributes and non-attributes |
| * because of the potential security risk of creating links |
| * into "normal" file space in order to circumvent restrictions |
| * imposed in attribute space. |
| */ |
| if ((szp->z_pflags & ZFS_XATTR) != (tdzp->z_pflags & ZFS_XATTR)) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EINVAL)); |
| } |
| |
| |
| owner = zfs_fuid_map_id(zfsvfs, szp->z_uid, cr, ZFS_OWNER); |
| if (owner != crgetuid(cr) && secpolicy_basic_link(ZTOV(szp), cr) != 0) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EPERM)); |
| } |
| |
| if ((error = zfs_zaccess(tdzp, ACE_ADD_FILE, 0, B_FALSE, cr))) { |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| /* |
| * Attempt to lock directory; fail if entry already exists. |
| */ |
| error = zfs_dirent_lookup(tdzp, name, &tzp, ZNEW); |
| if (error) { |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| tx = dmu_tx_create(zfsvfs->z_os); |
| dmu_tx_hold_sa(tx, szp->z_sa_hdl, B_FALSE); |
| dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, name); |
| zfs_sa_upgrade_txholds(tx, szp); |
| zfs_sa_upgrade_txholds(tx, tdzp); |
| error = dmu_tx_assign(tx, TXG_WAIT); |
| if (error) { |
| dmu_tx_abort(tx); |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| error = zfs_link_create(tdzp, name, szp, tx, 0); |
| |
| if (error == 0) { |
| uint64_t txtype = TX_LINK; |
| zfs_log_link(zilog, tx, txtype, tdzp, szp, name); |
| } |
| |
| dmu_tx_commit(tx); |
| |
| if (error == 0) { |
| vnevent_link(ZTOV(szp), ct); |
| } |
| |
| if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) |
| zil_commit(zilog, 0); |
| |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| /* |
| * Free or allocate space in a file. Currently, this function only |
| * supports the `F_FREESP' command. However, this command is somewhat |
| * misnamed, as its functionality includes the ability to allocate as |
| * well as free space. |
| * |
| * IN: ip - inode of file to free data in. |
| * cmd - action to take (only F_FREESP supported). |
| * bfp - section of file to free/alloc. |
| * flag - current file open mode flags. |
| * offset - current file offset. |
| * cr - credentials of caller. |
| * |
| * RETURN: 0 on success, error code on failure. |
| * |
| * Timestamps: |
| * ip - ctime|mtime updated |
| */ |
| /* ARGSUSED */ |
| int |
| zfs_space(znode_t *zp, int cmd, flock64_t *bfp, int flag, |
| offset_t offset, cred_t *cr) |
| { |
| zfsvfs_t *zfsvfs = ZTOZSB(zp); |
| uint64_t off, len; |
| int error; |
| |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(zp); |
| |
| if (cmd != F_FREESP) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EINVAL)); |
| } |
| |
| /* |
| * Callers might not be able to detect properly that we are read-only, |
| * so check it explicitly here. |
| */ |
| if (zfs_is_readonly(zfsvfs)) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EROFS)); |
| } |
| |
| if (bfp->l_len < 0) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EINVAL)); |
| } |
| |
| /* |
| * Permissions aren't checked on Solaris because on this OS |
| * zfs_space() can only be called with an opened file handle. |
| * On Linux we can get here through truncate_range() which |
| * operates directly on inodes, so we need to check access rights. |
| */ |
| if ((error = zfs_zaccess(zp, ACE_WRITE_DATA, 0, B_FALSE, cr))) { |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| off = bfp->l_start; |
| len = bfp->l_len; /* 0 means from off to end of file */ |
| |
| error = zfs_freesp(zp, off, len, flag, TRUE); |
| |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| /*ARGSUSED*/ |
| static void |
| zfs_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct) |
| { |
| znode_t *zp = VTOZ(vp); |
| zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
| int error; |
| |
| ZFS_TEARDOWN_INACTIVE_ENTER_READ(zfsvfs); |
| if (zp->z_sa_hdl == NULL) { |
| /* |
| * The fs has been unmounted, or we did a |
| * suspend/resume and this file no longer exists. |
| */ |
| ZFS_TEARDOWN_INACTIVE_EXIT_READ(zfsvfs); |
| vrecycle(vp); |
| return; |
| } |
| |
| if (zp->z_unlinked) { |
| /* |
| * Fast path to recycle a vnode of a removed file. |
| */ |
| ZFS_TEARDOWN_INACTIVE_EXIT_READ(zfsvfs); |
| vrecycle(vp); |
| return; |
| } |
| |
| if (zp->z_atime_dirty && zp->z_unlinked == 0) { |
| dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os); |
| |
| dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); |
| zfs_sa_upgrade_txholds(tx, zp); |
| error = dmu_tx_assign(tx, TXG_WAIT); |
| if (error) { |
| dmu_tx_abort(tx); |
| } else { |
| (void) sa_update(zp->z_sa_hdl, SA_ZPL_ATIME(zfsvfs), |
| (void *)&zp->z_atime, sizeof (zp->z_atime), tx); |
| zp->z_atime_dirty = 0; |
| dmu_tx_commit(tx); |
| } |
| } |
| ZFS_TEARDOWN_INACTIVE_EXIT_READ(zfsvfs); |
| } |
| |
| |
| CTASSERT(sizeof (struct zfid_short) <= sizeof (struct fid)); |
| CTASSERT(sizeof (struct zfid_long) <= sizeof (struct fid)); |
| |
| /*ARGSUSED*/ |
| static int |
| zfs_fid(vnode_t *vp, fid_t *fidp, caller_context_t *ct) |
| { |
| znode_t *zp = VTOZ(vp); |
| zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
| uint32_t gen; |
| uint64_t gen64; |
| uint64_t object = zp->z_id; |
| zfid_short_t *zfid; |
| int size, i, error; |
| |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(zp); |
| |
| if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zfsvfs), |
| &gen64, sizeof (uint64_t))) != 0) { |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| gen = (uint32_t)gen64; |
| |
| size = (zfsvfs->z_parent != zfsvfs) ? LONG_FID_LEN : SHORT_FID_LEN; |
| fidp->fid_len = size; |
| |
| zfid = (zfid_short_t *)fidp; |
| |
| zfid->zf_len = size; |
| |
| for (i = 0; i < sizeof (zfid->zf_object); i++) |
| zfid->zf_object[i] = (uint8_t)(object >> (8 * i)); |
| |
| /* Must have a non-zero generation number to distinguish from .zfs */ |
| if (gen == 0) |
| gen = 1; |
| for (i = 0; i < sizeof (zfid->zf_gen); i++) |
| zfid->zf_gen[i] = (uint8_t)(gen >> (8 * i)); |
| |
| if (size == LONG_FID_LEN) { |
| uint64_t objsetid = dmu_objset_id(zfsvfs->z_os); |
| zfid_long_t *zlfid; |
| |
| zlfid = (zfid_long_t *)fidp; |
| |
| for (i = 0; i < sizeof (zlfid->zf_setid); i++) |
| zlfid->zf_setid[i] = (uint8_t)(objsetid >> (8 * i)); |
| |
| /* XXX - this should be the generation number for the objset */ |
| for (i = 0; i < sizeof (zlfid->zf_setgen); i++) |
| zlfid->zf_setgen[i] = 0; |
| } |
| |
| ZFS_EXIT(zfsvfs); |
| return (0); |
| } |
| |
| static int |
| zfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr, |
| caller_context_t *ct) |
| { |
| znode_t *zp; |
| zfsvfs_t *zfsvfs; |
| |
| switch (cmd) { |
| case _PC_LINK_MAX: |
| *valp = MIN(LONG_MAX, ZFS_LINK_MAX); |
| return (0); |
| |
| case _PC_FILESIZEBITS: |
| *valp = 64; |
| return (0); |
| case _PC_MIN_HOLE_SIZE: |
| *valp = (int)SPA_MINBLOCKSIZE; |
| return (0); |
| case _PC_ACL_EXTENDED: |
| #if 0 /* POSIX ACLs are not implemented for ZFS on FreeBSD yet. */ |
| zp = VTOZ(vp); |
| zfsvfs = zp->z_zfsvfs; |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(zp); |
| *valp = zfsvfs->z_acl_type == ZFSACLTYPE_POSIX ? 1 : 0; |
| ZFS_EXIT(zfsvfs); |
| #else |
| *valp = 0; |
| #endif |
| return (0); |
| |
| case _PC_ACL_NFS4: |
| zp = VTOZ(vp); |
| zfsvfs = zp->z_zfsvfs; |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(zp); |
| *valp = zfsvfs->z_acl_type == ZFS_ACLTYPE_NFSV4 ? 1 : 0; |
| ZFS_EXIT(zfsvfs); |
| return (0); |
| |
| case _PC_ACL_PATH_MAX: |
| *valp = ACL_MAX_ENTRIES; |
| return (0); |
| |
| default: |
| return (EOPNOTSUPP); |
| } |
| } |
| |
| static int |
| zfs_getpages(struct vnode *vp, vm_page_t *ma, int count, int *rbehind, |
| int *rahead) |
| { |
| znode_t *zp = VTOZ(vp); |
| zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
| zfs_locked_range_t *lr; |
| vm_object_t object; |
| off_t start, end, obj_size; |
| uint_t blksz; |
| int pgsin_b, pgsin_a; |
| int error; |
| |
| ZFS_ENTER_ERROR(zfsvfs, zfs_vm_pagerret_error); |
| ZFS_VERIFY_ZP_ERROR(zp, zfs_vm_pagerret_error); |
| |
| start = IDX_TO_OFF(ma[0]->pindex); |
| end = IDX_TO_OFF(ma[count - 1]->pindex + 1); |
| |
| /* |
| * Lock a range covering all required and optional pages. |
| * Note that we need to handle the case of the block size growing. |
| */ |
| for (;;) { |
| blksz = zp->z_blksz; |
| lr = zfs_rangelock_tryenter(&zp->z_rangelock, |
| rounddown(start, blksz), |
| roundup(end, blksz) - rounddown(start, blksz), RL_READER); |
| if (lr == NULL) { |
| if (rahead != NULL) { |
| *rahead = 0; |
| rahead = NULL; |
| } |
| if (rbehind != NULL) { |
| *rbehind = 0; |
| rbehind = NULL; |
| } |
| break; |
| } |
| if (blksz == zp->z_blksz) |
| break; |
| zfs_rangelock_exit(lr); |
| } |
| |
| object = ma[0]->object; |
| zfs_vmobject_wlock(object); |
| obj_size = object->un_pager.vnp.vnp_size; |
| zfs_vmobject_wunlock(object); |
| if (IDX_TO_OFF(ma[count - 1]->pindex) >= obj_size) { |
| if (lr != NULL) |
| zfs_rangelock_exit(lr); |
| ZFS_EXIT(zfsvfs); |
| return (zfs_vm_pagerret_bad); |
| } |
| |
| pgsin_b = 0; |
| if (rbehind != NULL) { |
| pgsin_b = OFF_TO_IDX(start - rounddown(start, blksz)); |
| pgsin_b = MIN(*rbehind, pgsin_b); |
| } |
| |
| pgsin_a = 0; |
| if (rahead != NULL) { |
| pgsin_a = OFF_TO_IDX(roundup(end, blksz) - end); |
| if (end + IDX_TO_OFF(pgsin_a) >= obj_size) |
| pgsin_a = OFF_TO_IDX(round_page(obj_size) - end); |
| pgsin_a = MIN(*rahead, pgsin_a); |
| } |
| |
| /* |
| * NB: we need to pass the exact byte size of the data that we expect |
| * to read after accounting for the file size. This is required because |
| * ZFS will panic if we request DMU to read beyond the end of the last |
| * allocated block. |
| */ |
| error = dmu_read_pages(zfsvfs->z_os, zp->z_id, ma, count, &pgsin_b, |
| &pgsin_a, MIN(end, obj_size) - (end - PAGE_SIZE)); |
| |
| if (lr != NULL) |
| zfs_rangelock_exit(lr); |
| ZFS_ACCESSTIME_STAMP(zfsvfs, zp); |
| |
| dataset_kstats_update_read_kstats(&zfsvfs->z_kstat, count*PAGE_SIZE); |
| |
| ZFS_EXIT(zfsvfs); |
| |
| if (error != 0) |
| return (zfs_vm_pagerret_error); |
| |
| VM_CNT_INC(v_vnodein); |
| VM_CNT_ADD(v_vnodepgsin, count + pgsin_b + pgsin_a); |
| if (rbehind != NULL) |
| *rbehind = pgsin_b; |
| if (rahead != NULL) |
| *rahead = pgsin_a; |
| return (zfs_vm_pagerret_ok); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_getpages_args { |
| struct vnode *a_vp; |
| vm_page_t *a_m; |
| int a_count; |
| int *a_rbehind; |
| int *a_rahead; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_getpages(struct vop_getpages_args *ap) |
| { |
| |
| return (zfs_getpages(ap->a_vp, ap->a_m, ap->a_count, ap->a_rbehind, |
| ap->a_rahead)); |
| } |
| |
| static int |
| zfs_putpages(struct vnode *vp, vm_page_t *ma, size_t len, int flags, |
| int *rtvals) |
| { |
| znode_t *zp = VTOZ(vp); |
| zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
| zfs_locked_range_t *lr; |
| dmu_tx_t *tx; |
| struct sf_buf *sf; |
| vm_object_t object; |
| vm_page_t m; |
| caddr_t va; |
| size_t tocopy; |
| size_t lo_len; |
| vm_ooffset_t lo_off; |
| vm_ooffset_t off; |
| uint_t blksz; |
| int ncount; |
| int pcount; |
| int err; |
| int i; |
| |
| object = vp->v_object; |
| KASSERT(ma[0]->object == object, ("mismatching object")); |
| KASSERT(len > 0 && (len & PAGE_MASK) == 0, ("unexpected length")); |
| |
| pcount = btoc(len); |
| ncount = pcount; |
| for (i = 0; i < pcount; i++) |
| rtvals[i] = zfs_vm_pagerret_error; |
| |
| ZFS_ENTER_ERROR(zfsvfs, zfs_vm_pagerret_error); |
| ZFS_VERIFY_ZP_ERROR(zp, zfs_vm_pagerret_error); |
| |
| off = IDX_TO_OFF(ma[0]->pindex); |
| blksz = zp->z_blksz; |
| lo_off = rounddown(off, blksz); |
| lo_len = roundup(len + (off - lo_off), blksz); |
| lr = zfs_rangelock_enter(&zp->z_rangelock, lo_off, lo_len, RL_WRITER); |
| |
| zfs_vmobject_wlock(object); |
| if (len + off > object->un_pager.vnp.vnp_size) { |
| if (object->un_pager.vnp.vnp_size > off) { |
| int pgoff; |
| |
| len = object->un_pager.vnp.vnp_size - off; |
| ncount = btoc(len); |
| if ((pgoff = (int)len & PAGE_MASK) != 0) { |
| /* |
| * If the object is locked and the following |
| * conditions hold, then the page's dirty |
| * field cannot be concurrently changed by a |
| * pmap operation. |
| */ |
| m = ma[ncount - 1]; |
| vm_page_assert_sbusied(m); |
| KASSERT(!pmap_page_is_write_mapped(m), |
| ("zfs_putpages: page %p is not read-only", |
| m)); |
| vm_page_clear_dirty(m, pgoff, PAGE_SIZE - |
| pgoff); |
| } |
| } else { |
| len = 0; |
| ncount = 0; |
| } |
| if (ncount < pcount) { |
| for (i = ncount; i < pcount; i++) { |
| rtvals[i] = zfs_vm_pagerret_bad; |
| } |
| } |
| } |
| zfs_vmobject_wunlock(object); |
| |
| if (ncount == 0) |
| goto out; |
| |
| if (zfs_id_overblockquota(zfsvfs, DMU_USERUSED_OBJECT, zp->z_uid) || |
| zfs_id_overblockquota(zfsvfs, DMU_GROUPUSED_OBJECT, zp->z_gid) || |
| (zp->z_projid != ZFS_DEFAULT_PROJID && |
| zfs_id_overblockquota(zfsvfs, DMU_PROJECTUSED_OBJECT, |
| zp->z_projid))) { |
| goto out; |
| } |
| |
| tx = dmu_tx_create(zfsvfs->z_os); |
| dmu_tx_hold_write(tx, zp->z_id, off, len); |
| |
| dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); |
| zfs_sa_upgrade_txholds(tx, zp); |
| err = dmu_tx_assign(tx, TXG_WAIT); |
| if (err != 0) { |
| dmu_tx_abort(tx); |
| goto out; |
| } |
| |
| if (zp->z_blksz < PAGE_SIZE) { |
| for (i = 0; len > 0; off += tocopy, len -= tocopy, i++) { |
| tocopy = len > PAGE_SIZE ? PAGE_SIZE : len; |
| va = zfs_map_page(ma[i], &sf); |
| dmu_write(zfsvfs->z_os, zp->z_id, off, tocopy, va, tx); |
| zfs_unmap_page(sf); |
| } |
| } else { |
| err = dmu_write_pages(zfsvfs->z_os, zp->z_id, off, len, ma, tx); |
| } |
| |
| if (err == 0) { |
| uint64_t mtime[2], ctime[2]; |
| sa_bulk_attr_t bulk[3]; |
| int count = 0; |
| |
| SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, |
| &mtime, 16); |
| SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, |
| &ctime, 16); |
| SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL, |
| &zp->z_pflags, 8); |
| zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime); |
| err = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx); |
| ASSERT0(err); |
| /* |
| * XXX we should be passing a callback to undirty |
| * but that would make the locking messier |
| */ |
| zfs_log_write(zfsvfs->z_log, tx, TX_WRITE, zp, off, |
| len, 0, NULL, NULL); |
| |
| zfs_vmobject_wlock(object); |
| for (i = 0; i < ncount; i++) { |
| rtvals[i] = zfs_vm_pagerret_ok; |
| vm_page_undirty(ma[i]); |
| } |
| zfs_vmobject_wunlock(object); |
| VM_CNT_INC(v_vnodeout); |
| VM_CNT_ADD(v_vnodepgsout, ncount); |
| } |
| dmu_tx_commit(tx); |
| |
| out: |
| zfs_rangelock_exit(lr); |
| if ((flags & (zfs_vm_pagerput_sync | zfs_vm_pagerput_inval)) != 0 || |
| zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) |
| zil_commit(zfsvfs->z_log, zp->z_id); |
| |
| dataset_kstats_update_write_kstats(&zfsvfs->z_kstat, len); |
| |
| ZFS_EXIT(zfsvfs); |
| return (rtvals[0]); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_putpages_args { |
| struct vnode *a_vp; |
| vm_page_t *a_m; |
| int a_count; |
| int a_sync; |
| int *a_rtvals; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_putpages(struct vop_putpages_args *ap) |
| { |
| |
| return (zfs_putpages(ap->a_vp, ap->a_m, ap->a_count, ap->a_sync, |
| ap->a_rtvals)); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_bmap_args { |
| struct vnode *a_vp; |
| daddr_t a_bn; |
| struct bufobj **a_bop; |
| daddr_t *a_bnp; |
| int *a_runp; |
| int *a_runb; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_bmap(struct vop_bmap_args *ap) |
| { |
| |
| if (ap->a_bop != NULL) |
| *ap->a_bop = &ap->a_vp->v_bufobj; |
| if (ap->a_bnp != NULL) |
| *ap->a_bnp = ap->a_bn; |
| if (ap->a_runp != NULL) |
| *ap->a_runp = 0; |
| if (ap->a_runb != NULL) |
| *ap->a_runb = 0; |
| |
| return (0); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_open_args { |
| struct vnode *a_vp; |
| int a_mode; |
| struct ucred *a_cred; |
| struct thread *a_td; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_open(struct vop_open_args *ap) |
| { |
| vnode_t *vp = ap->a_vp; |
| znode_t *zp = VTOZ(vp); |
| int error; |
| |
| error = zfs_open(&vp, ap->a_mode, ap->a_cred); |
| if (error == 0) |
| vnode_create_vobject(vp, zp->z_size, ap->a_td); |
| return (error); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_close_args { |
| struct vnode *a_vp; |
| int a_fflag; |
| struct ucred *a_cred; |
| struct thread *a_td; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_close(struct vop_close_args *ap) |
| { |
| |
| return (zfs_close(ap->a_vp, ap->a_fflag, 1, 0, ap->a_cred)); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_ioctl_args { |
| struct vnode *a_vp; |
| ulong_t a_command; |
| caddr_t a_data; |
| int a_fflag; |
| struct ucred *cred; |
| struct thread *td; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_ioctl(struct vop_ioctl_args *ap) |
| { |
| |
| return (zfs_ioctl(ap->a_vp, ap->a_command, (intptr_t)ap->a_data, |
| ap->a_fflag, ap->a_cred, NULL)); |
| } |
| |
| static int |
| ioflags(int ioflags) |
| { |
| int flags = 0; |
| |
| if (ioflags & IO_APPEND) |
| flags |= FAPPEND; |
| if (ioflags & IO_NDELAY) |
| flags |= FNONBLOCK; |
| if (ioflags & IO_SYNC) |
| flags |= (FSYNC | FDSYNC | FRSYNC); |
| |
| return (flags); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_read_args { |
| struct vnode *a_vp; |
| struct uio *a_uio; |
| int a_ioflag; |
| struct ucred *a_cred; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_read(struct vop_read_args *ap) |
| { |
| zfs_uio_t uio; |
| zfs_uio_init(&uio, ap->a_uio); |
| return (zfs_read(VTOZ(ap->a_vp), &uio, ioflags(ap->a_ioflag), |
| ap->a_cred)); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_write_args { |
| struct vnode *a_vp; |
| struct uio *a_uio; |
| int a_ioflag; |
| struct ucred *a_cred; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_write(struct vop_write_args *ap) |
| { |
| zfs_uio_t uio; |
| zfs_uio_init(&uio, ap->a_uio); |
| return (zfs_write(VTOZ(ap->a_vp), &uio, ioflags(ap->a_ioflag), |
| ap->a_cred)); |
| } |
| |
| #if __FreeBSD_version >= 1300102 |
| /* |
| * VOP_FPLOOKUP_VEXEC routines are subject to special circumstances, see |
| * the comment above cache_fplookup for details. |
| */ |
| static int |
| zfs_freebsd_fplookup_vexec(struct vop_fplookup_vexec_args *v) |
| { |
| vnode_t *vp; |
| znode_t *zp; |
| uint64_t pflags; |
| |
| vp = v->a_vp; |
| zp = VTOZ_SMR(vp); |
| if (__predict_false(zp == NULL)) |
| return (EAGAIN); |
| pflags = atomic_load_64(&zp->z_pflags); |
| if (pflags & ZFS_AV_QUARANTINED) |
| return (EAGAIN); |
| if (pflags & ZFS_XATTR) |
| return (EAGAIN); |
| if ((pflags & ZFS_NO_EXECS_DENIED) == 0) |
| return (EAGAIN); |
| return (0); |
| } |
| #endif |
| |
| #if __FreeBSD_version >= 1300139 |
| static int |
| zfs_freebsd_fplookup_symlink(struct vop_fplookup_symlink_args *v) |
| { |
| vnode_t *vp; |
| znode_t *zp; |
| char *target; |
| |
| vp = v->a_vp; |
| zp = VTOZ_SMR(vp); |
| if (__predict_false(zp == NULL)) { |
| return (EAGAIN); |
| } |
| |
| target = atomic_load_consume_ptr(&zp->z_cached_symlink); |
| if (target == NULL) { |
| return (EAGAIN); |
| } |
| return (cache_symlink_resolve(v->a_fpl, target, strlen(target))); |
| } |
| #endif |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_access_args { |
| struct vnode *a_vp; |
| accmode_t a_accmode; |
| struct ucred *a_cred; |
| struct thread *a_td; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_access(struct vop_access_args *ap) |
| { |
| vnode_t *vp = ap->a_vp; |
| znode_t *zp = VTOZ(vp); |
| accmode_t accmode; |
| int error = 0; |
| |
| |
| if (ap->a_accmode == VEXEC) { |
| if (zfs_fastaccesschk_execute(zp, ap->a_cred) == 0) |
| return (0); |
| } |
| |
| /* |
| * ZFS itself only knowns about VREAD, VWRITE, VEXEC and VAPPEND, |
| */ |
| accmode = ap->a_accmode & (VREAD|VWRITE|VEXEC|VAPPEND); |
| if (accmode != 0) |
| error = zfs_access(zp, accmode, 0, ap->a_cred); |
| |
| /* |
| * VADMIN has to be handled by vaccess(). |
| */ |
| if (error == 0) { |
| accmode = ap->a_accmode & ~(VREAD|VWRITE|VEXEC|VAPPEND); |
| if (accmode != 0) { |
| #if __FreeBSD_version >= 1300105 |
| error = vaccess(vp->v_type, zp->z_mode, zp->z_uid, |
| zp->z_gid, accmode, ap->a_cred); |
| #else |
| error = vaccess(vp->v_type, zp->z_mode, zp->z_uid, |
| zp->z_gid, accmode, ap->a_cred, NULL); |
| #endif |
| } |
| } |
| |
| /* |
| * For VEXEC, ensure that at least one execute bit is set for |
| * non-directories. |
| */ |
| if (error == 0 && (ap->a_accmode & VEXEC) != 0 && vp->v_type != VDIR && |
| (zp->z_mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == 0) { |
| error = EACCES; |
| } |
| |
| return (error); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_lookup_args { |
| struct vnode *a_dvp; |
| struct vnode **a_vpp; |
| struct componentname *a_cnp; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_lookup(struct vop_lookup_args *ap, boolean_t cached) |
| { |
| struct componentname *cnp = ap->a_cnp; |
| char nm[NAME_MAX + 1]; |
| |
| ASSERT3U(cnp->cn_namelen, <, sizeof (nm)); |
| strlcpy(nm, cnp->cn_nameptr, MIN(cnp->cn_namelen + 1, sizeof (nm))); |
| |
| return (zfs_lookup(ap->a_dvp, nm, ap->a_vpp, cnp, cnp->cn_nameiop, |
| cnp->cn_cred, 0, cached)); |
| } |
| |
| static int |
| zfs_freebsd_cachedlookup(struct vop_cachedlookup_args *ap) |
| { |
| |
| return (zfs_freebsd_lookup((struct vop_lookup_args *)ap, B_TRUE)); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_lookup_args { |
| struct vnode *a_dvp; |
| struct vnode **a_vpp; |
| struct componentname *a_cnp; |
| }; |
| #endif |
| |
| static int |
| zfs_cache_lookup(struct vop_lookup_args *ap) |
| { |
| zfsvfs_t *zfsvfs; |
| |
| zfsvfs = ap->a_dvp->v_mount->mnt_data; |
| if (zfsvfs->z_use_namecache) |
| return (vfs_cache_lookup(ap)); |
| else |
| return (zfs_freebsd_lookup(ap, B_FALSE)); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_create_args { |
| struct vnode *a_dvp; |
| struct vnode **a_vpp; |
| struct componentname *a_cnp; |
| struct vattr *a_vap; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_create(struct vop_create_args *ap) |
| { |
| zfsvfs_t *zfsvfs; |
| struct componentname *cnp = ap->a_cnp; |
| vattr_t *vap = ap->a_vap; |
| znode_t *zp = NULL; |
| int rc, mode; |
| |
| #if __FreeBSD_version < 1400068 |
| ASSERT(cnp->cn_flags & SAVENAME); |
| #endif |
| |
| vattr_init_mask(vap); |
| mode = vap->va_mode & ALLPERMS; |
| zfsvfs = ap->a_dvp->v_mount->mnt_data; |
| *ap->a_vpp = NULL; |
| |
| rc = zfs_create(VTOZ(ap->a_dvp), cnp->cn_nameptr, vap, !EXCL, mode, |
| &zp, cnp->cn_cred, 0 /* flag */, NULL /* vsecattr */); |
| if (rc == 0) |
| *ap->a_vpp = ZTOV(zp); |
| if (zfsvfs->z_use_namecache && |
| rc == 0 && (cnp->cn_flags & MAKEENTRY) != 0) |
| cache_enter(ap->a_dvp, *ap->a_vpp, cnp); |
| |
| return (rc); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_remove_args { |
| struct vnode *a_dvp; |
| struct vnode *a_vp; |
| struct componentname *a_cnp; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_remove(struct vop_remove_args *ap) |
| { |
| |
| #if __FreeBSD_version < 1400068 |
| ASSERT(ap->a_cnp->cn_flags & SAVENAME); |
| #endif |
| |
| return (zfs_remove_(ap->a_dvp, ap->a_vp, ap->a_cnp->cn_nameptr, |
| ap->a_cnp->cn_cred)); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_mkdir_args { |
| struct vnode *a_dvp; |
| struct vnode **a_vpp; |
| struct componentname *a_cnp; |
| struct vattr *a_vap; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_mkdir(struct vop_mkdir_args *ap) |
| { |
| vattr_t *vap = ap->a_vap; |
| znode_t *zp = NULL; |
| int rc; |
| |
| #if __FreeBSD_version < 1400068 |
| ASSERT(ap->a_cnp->cn_flags & SAVENAME); |
| #endif |
| |
| vattr_init_mask(vap); |
| *ap->a_vpp = NULL; |
| |
| rc = zfs_mkdir(VTOZ(ap->a_dvp), ap->a_cnp->cn_nameptr, vap, &zp, |
| ap->a_cnp->cn_cred, 0, NULL); |
| |
| if (rc == 0) |
| *ap->a_vpp = ZTOV(zp); |
| return (rc); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_rmdir_args { |
| struct vnode *a_dvp; |
| struct vnode *a_vp; |
| struct componentname *a_cnp; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_rmdir(struct vop_rmdir_args *ap) |
| { |
| struct componentname *cnp = ap->a_cnp; |
| |
| #if __FreeBSD_version < 1400068 |
| ASSERT(cnp->cn_flags & SAVENAME); |
| #endif |
| |
| return (zfs_rmdir_(ap->a_dvp, ap->a_vp, cnp->cn_nameptr, cnp->cn_cred)); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_readdir_args { |
| struct vnode *a_vp; |
| struct uio *a_uio; |
| struct ucred *a_cred; |
| int *a_eofflag; |
| int *a_ncookies; |
| cookie_t **a_cookies; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_readdir(struct vop_readdir_args *ap) |
| { |
| zfs_uio_t uio; |
| zfs_uio_init(&uio, ap->a_uio); |
| return (zfs_readdir(ap->a_vp, &uio, ap->a_cred, ap->a_eofflag, |
| ap->a_ncookies, ap->a_cookies)); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_fsync_args { |
| struct vnode *a_vp; |
| int a_waitfor; |
| struct thread *a_td; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_fsync(struct vop_fsync_args *ap) |
| { |
| |
| vop_stdfsync(ap); |
| return (zfs_fsync(VTOZ(ap->a_vp), 0, ap->a_td->td_ucred)); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_getattr_args { |
| struct vnode *a_vp; |
| struct vattr *a_vap; |
| struct ucred *a_cred; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_getattr(struct vop_getattr_args *ap) |
| { |
| vattr_t *vap = ap->a_vap; |
| xvattr_t xvap; |
| ulong_t fflags = 0; |
| int error; |
| |
| xva_init(&xvap); |
| xvap.xva_vattr = *vap; |
| xvap.xva_vattr.va_mask |= AT_XVATTR; |
| |
| /* Convert chflags into ZFS-type flags. */ |
| /* XXX: what about SF_SETTABLE?. */ |
| XVA_SET_REQ(&xvap, XAT_IMMUTABLE); |
| XVA_SET_REQ(&xvap, XAT_APPENDONLY); |
| XVA_SET_REQ(&xvap, XAT_NOUNLINK); |
| XVA_SET_REQ(&xvap, XAT_NODUMP); |
| XVA_SET_REQ(&xvap, XAT_READONLY); |
| XVA_SET_REQ(&xvap, XAT_ARCHIVE); |
| XVA_SET_REQ(&xvap, XAT_SYSTEM); |
| XVA_SET_REQ(&xvap, XAT_HIDDEN); |
| XVA_SET_REQ(&xvap, XAT_REPARSE); |
| XVA_SET_REQ(&xvap, XAT_OFFLINE); |
| XVA_SET_REQ(&xvap, XAT_SPARSE); |
| |
| error = zfs_getattr(ap->a_vp, (vattr_t *)&xvap, 0, ap->a_cred); |
| if (error != 0) |
| return (error); |
| |
| /* Convert ZFS xattr into chflags. */ |
| #define FLAG_CHECK(fflag, xflag, xfield) do { \ |
| if (XVA_ISSET_RTN(&xvap, (xflag)) && (xfield) != 0) \ |
| fflags |= (fflag); \ |
| } while (0) |
| FLAG_CHECK(SF_IMMUTABLE, XAT_IMMUTABLE, |
| xvap.xva_xoptattrs.xoa_immutable); |
| FLAG_CHECK(SF_APPEND, XAT_APPENDONLY, |
| xvap.xva_xoptattrs.xoa_appendonly); |
| FLAG_CHECK(SF_NOUNLINK, XAT_NOUNLINK, |
| xvap.xva_xoptattrs.xoa_nounlink); |
| FLAG_CHECK(UF_ARCHIVE, XAT_ARCHIVE, |
| xvap.xva_xoptattrs.xoa_archive); |
| FLAG_CHECK(UF_NODUMP, XAT_NODUMP, |
| xvap.xva_xoptattrs.xoa_nodump); |
| FLAG_CHECK(UF_READONLY, XAT_READONLY, |
| xvap.xva_xoptattrs.xoa_readonly); |
| FLAG_CHECK(UF_SYSTEM, XAT_SYSTEM, |
| xvap.xva_xoptattrs.xoa_system); |
| FLAG_CHECK(UF_HIDDEN, XAT_HIDDEN, |
| xvap.xva_xoptattrs.xoa_hidden); |
| FLAG_CHECK(UF_REPARSE, XAT_REPARSE, |
| xvap.xva_xoptattrs.xoa_reparse); |
| FLAG_CHECK(UF_OFFLINE, XAT_OFFLINE, |
| xvap.xva_xoptattrs.xoa_offline); |
| FLAG_CHECK(UF_SPARSE, XAT_SPARSE, |
| xvap.xva_xoptattrs.xoa_sparse); |
| |
| #undef FLAG_CHECK |
| *vap = xvap.xva_vattr; |
| vap->va_flags = fflags; |
| return (0); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_setattr_args { |
| struct vnode *a_vp; |
| struct vattr *a_vap; |
| struct ucred *a_cred; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_setattr(struct vop_setattr_args *ap) |
| { |
| vnode_t *vp = ap->a_vp; |
| vattr_t *vap = ap->a_vap; |
| cred_t *cred = ap->a_cred; |
| xvattr_t xvap; |
| ulong_t fflags; |
| uint64_t zflags; |
| |
| vattr_init_mask(vap); |
| vap->va_mask &= ~AT_NOSET; |
| |
| xva_init(&xvap); |
| xvap.xva_vattr = *vap; |
| |
| zflags = VTOZ(vp)->z_pflags; |
| |
| if (vap->va_flags != VNOVAL) { |
| zfsvfs_t *zfsvfs = VTOZ(vp)->z_zfsvfs; |
| int error; |
| |
| if (zfsvfs->z_use_fuids == B_FALSE) |
| return (EOPNOTSUPP); |
| |
| fflags = vap->va_flags; |
| /* |
| * XXX KDM |
| * We need to figure out whether it makes sense to allow |
| * UF_REPARSE through, since we don't really have other |
| * facilities to handle reparse points and zfs_setattr() |
| * doesn't currently allow setting that attribute anyway. |
| */ |
| if ((fflags & ~(SF_IMMUTABLE|SF_APPEND|SF_NOUNLINK|UF_ARCHIVE| |
| UF_NODUMP|UF_SYSTEM|UF_HIDDEN|UF_READONLY|UF_REPARSE| |
| UF_OFFLINE|UF_SPARSE)) != 0) |
| return (EOPNOTSUPP); |
| /* |
| * Unprivileged processes are not permitted to unset system |
| * flags, or modify flags if any system flags are set. |
| * Privileged non-jail processes may not modify system flags |
| * if securelevel > 0 and any existing system flags are set. |
| * Privileged jail processes behave like privileged non-jail |
| * processes if the PR_ALLOW_CHFLAGS permission bit is set; |
| * otherwise, they behave like unprivileged processes. |
| */ |
| if (secpolicy_fs_owner(vp->v_mount, cred) == 0 || |
| spl_priv_check_cred(cred, PRIV_VFS_SYSFLAGS) == 0) { |
| if (zflags & |
| (ZFS_IMMUTABLE | ZFS_APPENDONLY | ZFS_NOUNLINK)) { |
| error = securelevel_gt(cred, 0); |
| if (error != 0) |
| return (error); |
| } |
| } else { |
| /* |
| * Callers may only modify the file flags on |
| * objects they have VADMIN rights for. |
| */ |
| if ((error = VOP_ACCESS(vp, VADMIN, cred, |
| curthread)) != 0) |
| return (error); |
| if (zflags & |
| (ZFS_IMMUTABLE | ZFS_APPENDONLY | |
| ZFS_NOUNLINK)) { |
| return (EPERM); |
| } |
| if (fflags & |
| (SF_IMMUTABLE | SF_APPEND | SF_NOUNLINK)) { |
| return (EPERM); |
| } |
| } |
| |
| #define FLAG_CHANGE(fflag, zflag, xflag, xfield) do { \ |
| if (((fflags & (fflag)) && !(zflags & (zflag))) || \ |
| ((zflags & (zflag)) && !(fflags & (fflag)))) { \ |
| XVA_SET_REQ(&xvap, (xflag)); \ |
| (xfield) = ((fflags & (fflag)) != 0); \ |
| } \ |
| } while (0) |
| /* Convert chflags into ZFS-type flags. */ |
| /* XXX: what about SF_SETTABLE?. */ |
| FLAG_CHANGE(SF_IMMUTABLE, ZFS_IMMUTABLE, XAT_IMMUTABLE, |
| xvap.xva_xoptattrs.xoa_immutable); |
| FLAG_CHANGE(SF_APPEND, ZFS_APPENDONLY, XAT_APPENDONLY, |
| xvap.xva_xoptattrs.xoa_appendonly); |
| FLAG_CHANGE(SF_NOUNLINK, ZFS_NOUNLINK, XAT_NOUNLINK, |
| xvap.xva_xoptattrs.xoa_nounlink); |
| FLAG_CHANGE(UF_ARCHIVE, ZFS_ARCHIVE, XAT_ARCHIVE, |
| xvap.xva_xoptattrs.xoa_archive); |
| FLAG_CHANGE(UF_NODUMP, ZFS_NODUMP, XAT_NODUMP, |
| xvap.xva_xoptattrs.xoa_nodump); |
| FLAG_CHANGE(UF_READONLY, ZFS_READONLY, XAT_READONLY, |
| xvap.xva_xoptattrs.xoa_readonly); |
| FLAG_CHANGE(UF_SYSTEM, ZFS_SYSTEM, XAT_SYSTEM, |
| xvap.xva_xoptattrs.xoa_system); |
| FLAG_CHANGE(UF_HIDDEN, ZFS_HIDDEN, XAT_HIDDEN, |
| xvap.xva_xoptattrs.xoa_hidden); |
| FLAG_CHANGE(UF_REPARSE, ZFS_REPARSE, XAT_REPARSE, |
| xvap.xva_xoptattrs.xoa_reparse); |
| FLAG_CHANGE(UF_OFFLINE, ZFS_OFFLINE, XAT_OFFLINE, |
| xvap.xva_xoptattrs.xoa_offline); |
| FLAG_CHANGE(UF_SPARSE, ZFS_SPARSE, XAT_SPARSE, |
| xvap.xva_xoptattrs.xoa_sparse); |
| #undef FLAG_CHANGE |
| } |
| if (vap->va_birthtime.tv_sec != VNOVAL) { |
| xvap.xva_vattr.va_mask |= AT_XVATTR; |
| XVA_SET_REQ(&xvap, XAT_CREATETIME); |
| } |
| return (zfs_setattr(VTOZ(vp), (vattr_t *)&xvap, 0, cred)); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_rename_args { |
| struct vnode *a_fdvp; |
| struct vnode *a_fvp; |
| struct componentname *a_fcnp; |
| struct vnode *a_tdvp; |
| struct vnode *a_tvp; |
| struct componentname *a_tcnp; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_rename(struct vop_rename_args *ap) |
| { |
| vnode_t *fdvp = ap->a_fdvp; |
| vnode_t *fvp = ap->a_fvp; |
| vnode_t *tdvp = ap->a_tdvp; |
| vnode_t *tvp = ap->a_tvp; |
| int error; |
| |
| #if __FreeBSD_version < 1400068 |
| ASSERT(ap->a_fcnp->cn_flags & (SAVENAME|SAVESTART)); |
| ASSERT(ap->a_tcnp->cn_flags & (SAVENAME|SAVESTART)); |
| #endif |
| |
| error = zfs_do_rename(fdvp, &fvp, ap->a_fcnp, tdvp, &tvp, |
| ap->a_tcnp, ap->a_fcnp->cn_cred); |
| |
| vrele(fdvp); |
| vrele(fvp); |
| vrele(tdvp); |
| if (tvp != NULL) |
| vrele(tvp); |
| |
| return (error); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_symlink_args { |
| struct vnode *a_dvp; |
| struct vnode **a_vpp; |
| struct componentname *a_cnp; |
| struct vattr *a_vap; |
| char *a_target; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_symlink(struct vop_symlink_args *ap) |
| { |
| struct componentname *cnp = ap->a_cnp; |
| vattr_t *vap = ap->a_vap; |
| znode_t *zp = NULL; |
| #if __FreeBSD_version >= 1300139 |
| char *symlink; |
| size_t symlink_len; |
| #endif |
| int rc; |
| |
| #if __FreeBSD_version < 1400068 |
| ASSERT(cnp->cn_flags & SAVENAME); |
| #endif |
| |
| vap->va_type = VLNK; /* FreeBSD: Syscall only sets va_mode. */ |
| vattr_init_mask(vap); |
| *ap->a_vpp = NULL; |
| |
| rc = zfs_symlink(VTOZ(ap->a_dvp), cnp->cn_nameptr, vap, |
| ap->a_target, &zp, cnp->cn_cred, 0 /* flags */); |
| if (rc == 0) { |
| *ap->a_vpp = ZTOV(zp); |
| ASSERT_VOP_ELOCKED(ZTOV(zp), __func__); |
| #if __FreeBSD_version >= 1300139 |
| MPASS(zp->z_cached_symlink == NULL); |
| symlink_len = strlen(ap->a_target); |
| symlink = cache_symlink_alloc(symlink_len + 1, M_WAITOK); |
| if (symlink != NULL) { |
| memcpy(symlink, ap->a_target, symlink_len); |
| symlink[symlink_len] = '\0'; |
| atomic_store_rel_ptr((uintptr_t *)&zp->z_cached_symlink, |
| (uintptr_t)symlink); |
| } |
| #endif |
| } |
| return (rc); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_readlink_args { |
| struct vnode *a_vp; |
| struct uio *a_uio; |
| struct ucred *a_cred; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_readlink(struct vop_readlink_args *ap) |
| { |
| zfs_uio_t uio; |
| int error; |
| #if __FreeBSD_version >= 1300139 |
| znode_t *zp = VTOZ(ap->a_vp); |
| char *symlink, *base; |
| size_t symlink_len; |
| bool trycache; |
| #endif |
| |
| zfs_uio_init(&uio, ap->a_uio); |
| #if __FreeBSD_version >= 1300139 |
| trycache = false; |
| if (zfs_uio_segflg(&uio) == UIO_SYSSPACE && |
| zfs_uio_iovcnt(&uio) == 1) { |
| base = zfs_uio_iovbase(&uio, 0); |
| symlink_len = zfs_uio_iovlen(&uio, 0); |
| trycache = true; |
| } |
| #endif |
| error = zfs_readlink(ap->a_vp, &uio, ap->a_cred, NULL); |
| #if __FreeBSD_version >= 1300139 |
| if (atomic_load_ptr(&zp->z_cached_symlink) != NULL || |
| error != 0 || !trycache) { |
| return (error); |
| } |
| symlink_len -= zfs_uio_resid(&uio); |
| symlink = cache_symlink_alloc(symlink_len + 1, M_WAITOK); |
| if (symlink != NULL) { |
| memcpy(symlink, base, symlink_len); |
| symlink[symlink_len] = '\0'; |
| if (!atomic_cmpset_rel_ptr((uintptr_t *)&zp->z_cached_symlink, |
| (uintptr_t)NULL, (uintptr_t)symlink)) { |
| cache_symlink_free(symlink, symlink_len + 1); |
| } |
| } |
| #endif |
| return (error); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_link_args { |
| struct vnode *a_tdvp; |
| struct vnode *a_vp; |
| struct componentname *a_cnp; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_link(struct vop_link_args *ap) |
| { |
| struct componentname *cnp = ap->a_cnp; |
| vnode_t *vp = ap->a_vp; |
| vnode_t *tdvp = ap->a_tdvp; |
| |
| if (tdvp->v_mount != vp->v_mount) |
| return (EXDEV); |
| |
| #if __FreeBSD_version < 1400068 |
| ASSERT(cnp->cn_flags & SAVENAME); |
| #endif |
| |
| return (zfs_link(VTOZ(tdvp), VTOZ(vp), |
| cnp->cn_nameptr, cnp->cn_cred, 0)); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_inactive_args { |
| struct vnode *a_vp; |
| struct thread *a_td; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_inactive(struct vop_inactive_args *ap) |
| { |
| vnode_t *vp = ap->a_vp; |
| |
| #if __FreeBSD_version >= 1300123 |
| zfs_inactive(vp, curthread->td_ucred, NULL); |
| #else |
| zfs_inactive(vp, ap->a_td->td_ucred, NULL); |
| #endif |
| return (0); |
| } |
| |
| #if __FreeBSD_version >= 1300042 |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_need_inactive_args { |
| struct vnode *a_vp; |
| struct thread *a_td; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_need_inactive(struct vop_need_inactive_args *ap) |
| { |
| vnode_t *vp = ap->a_vp; |
| znode_t *zp = VTOZ(vp); |
| zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
| int need; |
| |
| if (vn_need_pageq_flush(vp)) |
| return (1); |
| |
| if (!ZFS_TEARDOWN_INACTIVE_TRY_ENTER_READ(zfsvfs)) |
| return (1); |
| need = (zp->z_sa_hdl == NULL || zp->z_unlinked || zp->z_atime_dirty); |
| ZFS_TEARDOWN_INACTIVE_EXIT_READ(zfsvfs); |
| |
| return (need); |
| } |
| #endif |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_reclaim_args { |
| struct vnode *a_vp; |
| struct thread *a_td; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_reclaim(struct vop_reclaim_args *ap) |
| { |
| vnode_t *vp = ap->a_vp; |
| znode_t *zp = VTOZ(vp); |
| zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
| |
| ASSERT3P(zp, !=, NULL); |
| |
| #if __FreeBSD_version < 1300042 |
| /* Destroy the vm object and flush associated pages. */ |
| vnode_destroy_vobject(vp); |
| #endif |
| /* |
| * z_teardown_inactive_lock protects from a race with |
| * zfs_znode_dmu_fini in zfsvfs_teardown during |
| * force unmount. |
| */ |
| ZFS_TEARDOWN_INACTIVE_ENTER_READ(zfsvfs); |
| if (zp->z_sa_hdl == NULL) |
| zfs_znode_free(zp); |
| else |
| zfs_zinactive(zp); |
| ZFS_TEARDOWN_INACTIVE_EXIT_READ(zfsvfs); |
| |
| vp->v_data = NULL; |
| return (0); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_fid_args { |
| struct vnode *a_vp; |
| struct fid *a_fid; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_fid(struct vop_fid_args *ap) |
| { |
| |
| return (zfs_fid(ap->a_vp, (void *)ap->a_fid, NULL)); |
| } |
| |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_pathconf_args { |
| struct vnode *a_vp; |
| int a_name; |
| register_t *a_retval; |
| } *ap; |
| #endif |
| |
| static int |
| zfs_freebsd_pathconf(struct vop_pathconf_args *ap) |
| { |
| ulong_t val; |
| int error; |
| |
| error = zfs_pathconf(ap->a_vp, ap->a_name, &val, |
| curthread->td_ucred, NULL); |
| if (error == 0) { |
| *ap->a_retval = val; |
| return (error); |
| } |
| if (error != EOPNOTSUPP) |
| return (error); |
| |
| switch (ap->a_name) { |
| case _PC_NAME_MAX: |
| *ap->a_retval = NAME_MAX; |
| return (0); |
| #if __FreeBSD_version >= 1400032 |
| case _PC_DEALLOC_PRESENT: |
| *ap->a_retval = 1; |
| return (0); |
| #endif |
| case _PC_PIPE_BUF: |
| if (ap->a_vp->v_type == VDIR || ap->a_vp->v_type == VFIFO) { |
| *ap->a_retval = PIPE_BUF; |
| return (0); |
| } |
| return (EINVAL); |
| default: |
| return (vop_stdpathconf(ap)); |
| } |
| } |
| |
| /* |
| * FreeBSD's extended attributes namespace defines file name prefix for ZFS' |
| * extended attribute name: |
| * |
| * NAMESPACE PREFIX |
| * system freebsd:system: |
| * user (none, can be used to access ZFS fsattr(5) attributes |
| * created on Solaris) |
| */ |
| static int |
| zfs_create_attrname(int attrnamespace, const char *name, char *attrname, |
| size_t size) |
| { |
| const char *namespace, *prefix, *suffix; |
| |
| /* We don't allow '/' character in attribute name. */ |
| if (strchr(name, '/') != NULL) |
| return (SET_ERROR(EINVAL)); |
| /* We don't allow attribute names that start with "freebsd:" string. */ |
| if (strncmp(name, "freebsd:", 8) == 0) |
| return (SET_ERROR(EINVAL)); |
| |
| bzero(attrname, size); |
| |
| switch (attrnamespace) { |
| case EXTATTR_NAMESPACE_USER: |
| #if 0 |
| prefix = "freebsd:"; |
| namespace = EXTATTR_NAMESPACE_USER_STRING; |
| suffix = ":"; |
| #else |
| /* |
| * This is the default namespace by which we can access all |
| * attributes created on Solaris. |
| */ |
| prefix = namespace = suffix = ""; |
| #endif |
| break; |
| case EXTATTR_NAMESPACE_SYSTEM: |
| prefix = "freebsd:"; |
| namespace = EXTATTR_NAMESPACE_SYSTEM_STRING; |
| suffix = ":"; |
| break; |
| case EXTATTR_NAMESPACE_EMPTY: |
| default: |
| return (SET_ERROR(EINVAL)); |
| } |
| if (snprintf(attrname, size, "%s%s%s%s", prefix, namespace, suffix, |
| name) >= size) { |
| return (SET_ERROR(ENAMETOOLONG)); |
| } |
| return (0); |
| } |
| |
| static int |
| zfs_ensure_xattr_cached(znode_t *zp) |
| { |
| int error = 0; |
| |
| ASSERT(RW_LOCK_HELD(&zp->z_xattr_lock)); |
| |
| if (zp->z_xattr_cached != NULL) |
| return (0); |
| |
| if (rw_write_held(&zp->z_xattr_lock)) |
| return (zfs_sa_get_xattr(zp)); |
| |
| if (!rw_tryupgrade(&zp->z_xattr_lock)) { |
| rw_exit(&zp->z_xattr_lock); |
| rw_enter(&zp->z_xattr_lock, RW_WRITER); |
| } |
| if (zp->z_xattr_cached == NULL) |
| error = zfs_sa_get_xattr(zp); |
| rw_downgrade(&zp->z_xattr_lock); |
| return (error); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_getextattr { |
| IN struct vnode *a_vp; |
| IN int a_attrnamespace; |
| IN const char *a_name; |
| INOUT struct uio *a_uio; |
| OUT size_t *a_size; |
| IN struct ucred *a_cred; |
| IN struct thread *a_td; |
| }; |
| #endif |
| |
| static int |
| zfs_getextattr_dir(struct vop_getextattr_args *ap, const char *attrname) |
| { |
| struct thread *td = ap->a_td; |
| struct nameidata nd; |
| struct vattr va; |
| vnode_t *xvp = NULL, *vp; |
| int error, flags; |
| |
| error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, |
| LOOKUP_XATTR, B_FALSE); |
| if (error != 0) |
| return (error); |
| |
| flags = FREAD; |
| #if __FreeBSD_version < 1400043 |
| NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, attrname, |
| xvp, td); |
| #else |
| NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, attrname, xvp); |
| #endif |
| error = vn_open_cred(&nd, &flags, 0, VN_OPEN_INVFS, ap->a_cred, NULL); |
| if (error != 0) |
| return (error); |
| vp = nd.ni_vp; |
| NDFREE_PNBUF(&nd); |
| |
| if (ap->a_size != NULL) { |
| error = VOP_GETATTR(vp, &va, ap->a_cred); |
| if (error == 0) |
| *ap->a_size = (size_t)va.va_size; |
| } else if (ap->a_uio != NULL) |
| error = VOP_READ(vp, ap->a_uio, IO_UNIT, ap->a_cred); |
| |
| VOP_UNLOCK1(vp); |
| vn_close(vp, flags, ap->a_cred, td); |
| return (error); |
| } |
| |
| static int |
| zfs_getextattr_sa(struct vop_getextattr_args *ap, const char *attrname) |
| { |
| znode_t *zp = VTOZ(ap->a_vp); |
| uchar_t *nv_value; |
| uint_t nv_size; |
| int error; |
| |
| error = zfs_ensure_xattr_cached(zp); |
| if (error != 0) |
| return (error); |
| |
| ASSERT(RW_LOCK_HELD(&zp->z_xattr_lock)); |
| ASSERT3P(zp->z_xattr_cached, !=, NULL); |
| |
| error = nvlist_lookup_byte_array(zp->z_xattr_cached, attrname, |
| &nv_value, &nv_size); |
| if (error) |
| return (error); |
| |
| if (ap->a_size != NULL) |
| *ap->a_size = nv_size; |
| else if (ap->a_uio != NULL) |
| error = uiomove(nv_value, nv_size, ap->a_uio); |
| |
| return (error); |
| } |
| |
| /* |
| * Vnode operation to retrieve a named extended attribute. |
| */ |
| static int |
| zfs_getextattr(struct vop_getextattr_args *ap) |
| { |
| znode_t *zp = VTOZ(ap->a_vp); |
| zfsvfs_t *zfsvfs = ZTOZSB(zp); |
| char attrname[EXTATTR_MAXNAMELEN+1]; |
| int error; |
| |
| /* |
| * If the xattr property is off, refuse the request. |
| */ |
| if (!(zfsvfs->z_flags & ZSB_XATTR)) |
| return (SET_ERROR(EOPNOTSUPP)); |
| |
| error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace, |
| ap->a_cred, ap->a_td, VREAD); |
| if (error != 0) |
| return (error); |
| |
| error = zfs_create_attrname(ap->a_attrnamespace, ap->a_name, attrname, |
| sizeof (attrname)); |
| if (error != 0) |
| return (error); |
| |
| error = ENOENT; |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(zp); |
| rw_enter(&zp->z_xattr_lock, RW_READER); |
| if (zfsvfs->z_use_sa && zp->z_is_sa) |
| error = zfs_getextattr_sa(ap, attrname); |
| if (error == ENOENT) |
| error = zfs_getextattr_dir(ap, attrname); |
| rw_exit(&zp->z_xattr_lock); |
| ZFS_EXIT(zfsvfs); |
| if (error == ENOENT) |
| error = SET_ERROR(ENOATTR); |
| return (error); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_deleteextattr { |
| IN struct vnode *a_vp; |
| IN int a_attrnamespace; |
| IN const char *a_name; |
| IN struct ucred *a_cred; |
| IN struct thread *a_td; |
| }; |
| #endif |
| |
| static int |
| zfs_deleteextattr_dir(struct vop_deleteextattr_args *ap, const char *attrname) |
| { |
| struct nameidata nd; |
| vnode_t *xvp = NULL, *vp; |
| int error; |
| |
| error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, |
| LOOKUP_XATTR, B_FALSE); |
| if (error != 0) |
| return (error); |
| |
| #if __FreeBSD_version < 1400043 |
| NDINIT_ATVP(&nd, DELETE, NOFOLLOW | LOCKPARENT | LOCKLEAF, |
| UIO_SYSSPACE, attrname, xvp, ap->a_td); |
| #else |
| NDINIT_ATVP(&nd, DELETE, NOFOLLOW | LOCKPARENT | LOCKLEAF, |
| UIO_SYSSPACE, attrname, xvp); |
| #endif |
| error = namei(&nd); |
| if (error != 0) |
| return (error); |
| |
| vp = nd.ni_vp; |
| error = VOP_REMOVE(nd.ni_dvp, vp, &nd.ni_cnd); |
| NDFREE_PNBUF(&nd); |
| |
| vput(nd.ni_dvp); |
| if (vp == nd.ni_dvp) |
| vrele(vp); |
| else |
| vput(vp); |
| |
| return (error); |
| } |
| |
| static int |
| zfs_deleteextattr_sa(struct vop_deleteextattr_args *ap, const char *attrname) |
| { |
| znode_t *zp = VTOZ(ap->a_vp); |
| nvlist_t *nvl; |
| int error; |
| |
| error = zfs_ensure_xattr_cached(zp); |
| if (error != 0) |
| return (error); |
| |
| ASSERT(RW_WRITE_HELD(&zp->z_xattr_lock)); |
| ASSERT3P(zp->z_xattr_cached, !=, NULL); |
| |
| nvl = zp->z_xattr_cached; |
| error = nvlist_remove(nvl, attrname, DATA_TYPE_BYTE_ARRAY); |
| if (error == 0) |
| error = zfs_sa_set_xattr(zp); |
| if (error != 0) { |
| zp->z_xattr_cached = NULL; |
| nvlist_free(nvl); |
| } |
| return (error); |
| } |
| |
| /* |
| * Vnode operation to remove a named attribute. |
| */ |
| static int |
| zfs_deleteextattr(struct vop_deleteextattr_args *ap) |
| { |
| znode_t *zp = VTOZ(ap->a_vp); |
| zfsvfs_t *zfsvfs = ZTOZSB(zp); |
| char attrname[EXTATTR_MAXNAMELEN+1]; |
| int error; |
| |
| /* |
| * If the xattr property is off, refuse the request. |
| */ |
| if (!(zfsvfs->z_flags & ZSB_XATTR)) |
| return (SET_ERROR(EOPNOTSUPP)); |
| |
| error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace, |
| ap->a_cred, ap->a_td, VWRITE); |
| if (error != 0) |
| return (error); |
| |
| error = zfs_create_attrname(ap->a_attrnamespace, ap->a_name, attrname, |
| sizeof (attrname)); |
| if (error != 0) |
| return (error); |
| |
| size_t size = 0; |
| struct vop_getextattr_args vga = { |
| .a_vp = ap->a_vp, |
| .a_size = &size, |
| .a_cred = ap->a_cred, |
| .a_td = ap->a_td, |
| }; |
| error = ENOENT; |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(zp); |
| rw_enter(&zp->z_xattr_lock, RW_WRITER); |
| if (zfsvfs->z_use_sa && zp->z_is_sa) { |
| error = zfs_getextattr_sa(&vga, attrname); |
| if (error == 0) |
| error = zfs_deleteextattr_sa(ap, attrname); |
| } |
| if (error == ENOENT) { |
| error = zfs_getextattr_dir(&vga, attrname); |
| if (error == 0) |
| error = zfs_deleteextattr_dir(ap, attrname); |
| } |
| rw_exit(&zp->z_xattr_lock); |
| ZFS_EXIT(zfsvfs); |
| if (error == ENOENT) |
| error = SET_ERROR(ENOATTR); |
| return (error); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_setextattr { |
| IN struct vnode *a_vp; |
| IN int a_attrnamespace; |
| IN const char *a_name; |
| INOUT struct uio *a_uio; |
| IN struct ucred *a_cred; |
| IN struct thread *a_td; |
| }; |
| #endif |
| |
| static int |
| zfs_setextattr_dir(struct vop_setextattr_args *ap, const char *attrname) |
| { |
| struct thread *td = ap->a_td; |
| struct nameidata nd; |
| struct vattr va; |
| vnode_t *xvp = NULL, *vp; |
| int error, flags; |
| |
| error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, |
| LOOKUP_XATTR | CREATE_XATTR_DIR, B_FALSE); |
| if (error != 0) |
| return (error); |
| |
| flags = FFLAGS(O_WRONLY | O_CREAT); |
| #if __FreeBSD_version < 1400043 |
| NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, attrname, xvp, td); |
| #else |
| NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, attrname, xvp); |
| #endif |
| error = vn_open_cred(&nd, &flags, 0600, VN_OPEN_INVFS, ap->a_cred, |
| NULL); |
| if (error != 0) |
| return (error); |
| vp = nd.ni_vp; |
| NDFREE_PNBUF(&nd); |
| |
| VATTR_NULL(&va); |
| va.va_size = 0; |
| error = VOP_SETATTR(vp, &va, ap->a_cred); |
| if (error == 0) |
| VOP_WRITE(vp, ap->a_uio, IO_UNIT, ap->a_cred); |
| |
| VOP_UNLOCK1(vp); |
| vn_close(vp, flags, ap->a_cred, td); |
| return (error); |
| } |
| |
| static int |
| zfs_setextattr_sa(struct vop_setextattr_args *ap, const char *attrname) |
| { |
| znode_t *zp = VTOZ(ap->a_vp); |
| nvlist_t *nvl; |
| size_t sa_size; |
| int error; |
| |
| error = zfs_ensure_xattr_cached(zp); |
| if (error != 0) |
| return (error); |
| |
| ASSERT(RW_WRITE_HELD(&zp->z_xattr_lock)); |
| ASSERT3P(zp->z_xattr_cached, !=, NULL); |
| |
| nvl = zp->z_xattr_cached; |
| size_t entry_size = ap->a_uio->uio_resid; |
| if (entry_size > DXATTR_MAX_ENTRY_SIZE) |
| return (SET_ERROR(EFBIG)); |
| error = nvlist_size(nvl, &sa_size, NV_ENCODE_XDR); |
| if (error != 0) |
| return (error); |
| if (sa_size > DXATTR_MAX_SA_SIZE) |
| return (SET_ERROR(EFBIG)); |
| uchar_t *buf = kmem_alloc(entry_size, KM_SLEEP); |
| error = uiomove(buf, entry_size, ap->a_uio); |
| if (error == 0) |
| error = nvlist_add_byte_array(nvl, attrname, buf, entry_size); |
| kmem_free(buf, entry_size); |
| if (error == 0) |
| error = zfs_sa_set_xattr(zp); |
| if (error != 0) { |
| zp->z_xattr_cached = NULL; |
| nvlist_free(nvl); |
| } |
| return (error); |
| } |
| |
| /* |
| * Vnode operation to set a named attribute. |
| */ |
| static int |
| zfs_setextattr(struct vop_setextattr_args *ap) |
| { |
| znode_t *zp = VTOZ(ap->a_vp); |
| zfsvfs_t *zfsvfs = ZTOZSB(zp); |
| char attrname[EXTATTR_MAXNAMELEN+1]; |
| int error; |
| |
| /* |
| * If the xattr property is off, refuse the request. |
| */ |
| if (!(zfsvfs->z_flags & ZSB_XATTR)) |
| return (SET_ERROR(EOPNOTSUPP)); |
| |
| error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace, |
| ap->a_cred, ap->a_td, VWRITE); |
| if (error != 0) |
| return (error); |
| |
| error = zfs_create_attrname(ap->a_attrnamespace, ap->a_name, attrname, |
| sizeof (attrname)); |
| if (error != 0) |
| return (error); |
| |
| struct vop_deleteextattr_args vda = { |
| .a_vp = ap->a_vp, |
| .a_cred = ap->a_cred, |
| .a_td = ap->a_td, |
| }; |
| error = ENOENT; |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(zp); |
| rw_enter(&zp->z_xattr_lock, RW_WRITER); |
| if (zfsvfs->z_use_sa && zp->z_is_sa && zfsvfs->z_xattr_sa) { |
| error = zfs_setextattr_sa(ap, attrname); |
| if (error == 0) |
| /* |
| * Successfully put into SA, we need to clear the one |
| * in dir if present. |
| */ |
| zfs_deleteextattr_dir(&vda, attrname); |
| } |
| if (error) { |
| error = zfs_setextattr_dir(ap, attrname); |
| if (error == 0 && zp->z_is_sa) |
| /* |
| * Successfully put into dir, we need to clear the one |
| * in SA if present. |
| */ |
| zfs_deleteextattr_sa(&vda, attrname); |
| } |
| rw_exit(&zp->z_xattr_lock); |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_listextattr { |
| IN struct vnode *a_vp; |
| IN int a_attrnamespace; |
| INOUT struct uio *a_uio; |
| OUT size_t *a_size; |
| IN struct ucred *a_cred; |
| IN struct thread *a_td; |
| }; |
| #endif |
| |
| static int |
| zfs_listextattr_dir(struct vop_listextattr_args *ap, const char *attrprefix) |
| { |
| struct thread *td = ap->a_td; |
| struct nameidata nd; |
| uint8_t dirbuf[sizeof (struct dirent)]; |
| struct iovec aiov; |
| struct uio auio; |
| vnode_t *xvp = NULL, *vp; |
| int error, eof; |
| |
| error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, |
| LOOKUP_XATTR, B_FALSE); |
| if (error != 0) { |
| /* |
| * ENOATTR means that the EA directory does not yet exist, |
| * i.e. there are no extended attributes there. |
| */ |
| if (error == ENOATTR) |
| error = 0; |
| return (error); |
| } |
| |
| #if __FreeBSD_version < 1400043 |
| NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | LOCKSHARED, |
| UIO_SYSSPACE, ".", xvp, td); |
| #else |
| NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | LOCKSHARED, |
| UIO_SYSSPACE, ".", xvp); |
| #endif |
| error = namei(&nd); |
| if (error != 0) |
| return (error); |
| vp = nd.ni_vp; |
| NDFREE_PNBUF(&nd); |
| |
| auio.uio_iov = &aiov; |
| auio.uio_iovcnt = 1; |
| auio.uio_segflg = UIO_SYSSPACE; |
| auio.uio_td = td; |
| auio.uio_rw = UIO_READ; |
| auio.uio_offset = 0; |
| |
| size_t plen = strlen(attrprefix); |
| |
| do { |
| aiov.iov_base = (void *)dirbuf; |
| aiov.iov_len = sizeof (dirbuf); |
| auio.uio_resid = sizeof (dirbuf); |
| error = VOP_READDIR(vp, &auio, ap->a_cred, &eof, NULL, NULL); |
| if (error != 0) |
| break; |
| int done = sizeof (dirbuf) - auio.uio_resid; |
| for (int pos = 0; pos < done; ) { |
| struct dirent *dp = (struct dirent *)(dirbuf + pos); |
| pos += dp->d_reclen; |
| /* |
| * XXX: Temporarily we also accept DT_UNKNOWN, as this |
| * is what we get when attribute was created on Solaris. |
| */ |
| if (dp->d_type != DT_REG && dp->d_type != DT_UNKNOWN) |
| continue; |
| else if (plen == 0 && |
| strncmp(dp->d_name, "freebsd:", 8) == 0) |
| continue; |
| else if (strncmp(dp->d_name, attrprefix, plen) != 0) |
| continue; |
| uint8_t nlen = dp->d_namlen - plen; |
| if (ap->a_size != NULL) { |
| *ap->a_size += 1 + nlen; |
| } else if (ap->a_uio != NULL) { |
| /* |
| * Format of extattr name entry is one byte for |
| * length and the rest for name. |
| */ |
| error = uiomove(&nlen, 1, ap->a_uio); |
| if (error == 0) { |
| char *namep = dp->d_name + plen; |
| error = uiomove(namep, nlen, ap->a_uio); |
| } |
| if (error != 0) |
| break; |
| } |
| } |
| } while (!eof && error == 0); |
| |
| vput(vp); |
| return (error); |
| } |
| |
| static int |
| zfs_listextattr_sa(struct vop_listextattr_args *ap, const char *attrprefix) |
| { |
| znode_t *zp = VTOZ(ap->a_vp); |
| int error; |
| |
| error = zfs_ensure_xattr_cached(zp); |
| if (error != 0) |
| return (error); |
| |
| ASSERT(RW_LOCK_HELD(&zp->z_xattr_lock)); |
| ASSERT3P(zp->z_xattr_cached, !=, NULL); |
| |
| size_t plen = strlen(attrprefix); |
| nvpair_t *nvp = NULL; |
| while ((nvp = nvlist_next_nvpair(zp->z_xattr_cached, nvp)) != NULL) { |
| ASSERT3U(nvpair_type(nvp), ==, DATA_TYPE_BYTE_ARRAY); |
| |
| const char *name = nvpair_name(nvp); |
| if (plen == 0 && strncmp(name, "freebsd:", 8) == 0) |
| continue; |
| else if (strncmp(name, attrprefix, plen) != 0) |
| continue; |
| uint8_t nlen = strlen(name) - plen; |
| if (ap->a_size != NULL) { |
| *ap->a_size += 1 + nlen; |
| } else if (ap->a_uio != NULL) { |
| /* |
| * Format of extattr name entry is one byte for |
| * length and the rest for name. |
| */ |
| error = uiomove(&nlen, 1, ap->a_uio); |
| if (error == 0) { |
| char *namep = __DECONST(char *, name) + plen; |
| error = uiomove(namep, nlen, ap->a_uio); |
| } |
| if (error != 0) |
| break; |
| } |
| } |
| |
| return (error); |
| } |
| |
| /* |
| * Vnode operation to retrieve extended attributes on a vnode. |
| */ |
| static int |
| zfs_listextattr(struct vop_listextattr_args *ap) |
| { |
| znode_t *zp = VTOZ(ap->a_vp); |
| zfsvfs_t *zfsvfs = ZTOZSB(zp); |
| char attrprefix[16]; |
| int error; |
| |
| if (ap->a_size != NULL) |
| *ap->a_size = 0; |
| |
| /* |
| * If the xattr property is off, refuse the request. |
| */ |
| if (!(zfsvfs->z_flags & ZSB_XATTR)) |
| return (SET_ERROR(EOPNOTSUPP)); |
| |
| error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace, |
| ap->a_cred, ap->a_td, VREAD); |
| if (error != 0) |
| return (error); |
| |
| error = zfs_create_attrname(ap->a_attrnamespace, "", attrprefix, |
| sizeof (attrprefix)); |
| if (error != 0) |
| return (error); |
| |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(zp); |
| rw_enter(&zp->z_xattr_lock, RW_READER); |
| if (zfsvfs->z_use_sa && zp->z_is_sa) |
| error = zfs_listextattr_sa(ap, attrprefix); |
| if (error == 0) |
| error = zfs_listextattr_dir(ap, attrprefix); |
| rw_exit(&zp->z_xattr_lock); |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_getacl_args { |
| struct vnode *vp; |
| acl_type_t type; |
| struct acl *aclp; |
| struct ucred *cred; |
| struct thread *td; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_getacl(struct vop_getacl_args *ap) |
| { |
| int error; |
| vsecattr_t vsecattr; |
| |
| if (ap->a_type != ACL_TYPE_NFS4) |
| return (EINVAL); |
| |
| vsecattr.vsa_mask = VSA_ACE | VSA_ACECNT; |
| if ((error = zfs_getsecattr(VTOZ(ap->a_vp), |
| &vsecattr, 0, ap->a_cred))) |
| return (error); |
| |
| error = acl_from_aces(ap->a_aclp, vsecattr.vsa_aclentp, |
| vsecattr.vsa_aclcnt); |
| if (vsecattr.vsa_aclentp != NULL) |
| kmem_free(vsecattr.vsa_aclentp, vsecattr.vsa_aclentsz); |
| |
| return (error); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_setacl_args { |
| struct vnode *vp; |
| acl_type_t type; |
| struct acl *aclp; |
| struct ucred *cred; |
| struct thread *td; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_setacl(struct vop_setacl_args *ap) |
| { |
| int error; |
| vsecattr_t vsecattr; |
| int aclbsize; /* size of acl list in bytes */ |
| aclent_t *aaclp; |
| |
| if (ap->a_type != ACL_TYPE_NFS4) |
| return (EINVAL); |
| |
| if (ap->a_aclp == NULL) |
| return (EINVAL); |
| |
| if (ap->a_aclp->acl_cnt < 1 || ap->a_aclp->acl_cnt > MAX_ACL_ENTRIES) |
| return (EINVAL); |
| |
| /* |
| * With NFSv4 ACLs, chmod(2) may need to add additional entries, |
| * splitting every entry into two and appending "canonical six" |
| * entries at the end. Don't allow for setting an ACL that would |
| * cause chmod(2) to run out of ACL entries. |
| */ |
| if (ap->a_aclp->acl_cnt * 2 + 6 > ACL_MAX_ENTRIES) |
| return (ENOSPC); |
| |
| error = acl_nfs4_check(ap->a_aclp, ap->a_vp->v_type == VDIR); |
| if (error != 0) |
| return (error); |
| |
| vsecattr.vsa_mask = VSA_ACE; |
| aclbsize = ap->a_aclp->acl_cnt * sizeof (ace_t); |
| vsecattr.vsa_aclentp = kmem_alloc(aclbsize, KM_SLEEP); |
| aaclp = vsecattr.vsa_aclentp; |
| vsecattr.vsa_aclentsz = aclbsize; |
| |
| aces_from_acl(vsecattr.vsa_aclentp, &vsecattr.vsa_aclcnt, ap->a_aclp); |
| error = zfs_setsecattr(VTOZ(ap->a_vp), &vsecattr, 0, ap->a_cred); |
| kmem_free(aaclp, aclbsize); |
| |
| return (error); |
| } |
| |
| #ifndef _SYS_SYSPROTO_H_ |
| struct vop_aclcheck_args { |
| struct vnode *vp; |
| acl_type_t type; |
| struct acl *aclp; |
| struct ucred *cred; |
| struct thread *td; |
| }; |
| #endif |
| |
| static int |
| zfs_freebsd_aclcheck(struct vop_aclcheck_args *ap) |
| { |
| |
| return (EOPNOTSUPP); |
| } |
| |
| static int |
| zfs_vptocnp(struct vop_vptocnp_args *ap) |
| { |
| vnode_t *covered_vp; |
| vnode_t *vp = ap->a_vp; |
| zfsvfs_t *zfsvfs = vp->v_vfsp->vfs_data; |
| znode_t *zp = VTOZ(vp); |
| int ltype; |
| int error; |
| |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(zp); |
| |
| /* |
| * If we are a snapshot mounted under .zfs, run the operation |
| * on the covered vnode. |
| */ |
| if (zp->z_id != zfsvfs->z_root || zfsvfs->z_parent == zfsvfs) { |
| char name[MAXNAMLEN + 1]; |
| znode_t *dzp; |
| size_t len; |
| |
| error = zfs_znode_parent_and_name(zp, &dzp, name); |
| if (error == 0) { |
| len = strlen(name); |
| if (*ap->a_buflen < len) |
| error = SET_ERROR(ENOMEM); |
| } |
| if (error == 0) { |
| *ap->a_buflen -= len; |
| bcopy(name, ap->a_buf + *ap->a_buflen, len); |
| *ap->a_vpp = ZTOV(dzp); |
| } |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| ZFS_EXIT(zfsvfs); |
| |
| covered_vp = vp->v_mount->mnt_vnodecovered; |
| #if __FreeBSD_version >= 1300045 |
| enum vgetstate vs = vget_prep(covered_vp); |
| #else |
| vhold(covered_vp); |
| #endif |
| ltype = VOP_ISLOCKED(vp); |
| VOP_UNLOCK1(vp); |
| #if __FreeBSD_version >= 1300045 |
| error = vget_finish(covered_vp, LK_SHARED, vs); |
| #else |
| error = vget(covered_vp, LK_SHARED | LK_VNHELD, curthread); |
| #endif |
| if (error == 0) { |
| #if __FreeBSD_version >= 1300123 |
| error = VOP_VPTOCNP(covered_vp, ap->a_vpp, ap->a_buf, |
| ap->a_buflen); |
| #else |
| error = VOP_VPTOCNP(covered_vp, ap->a_vpp, ap->a_cred, |
| ap->a_buf, ap->a_buflen); |
| #endif |
| vput(covered_vp); |
| } |
| vn_lock(vp, ltype | LK_RETRY); |
| if (VN_IS_DOOMED(vp)) |
| error = SET_ERROR(ENOENT); |
| return (error); |
| } |
| |
| #if __FreeBSD_version >= 1400032 |
| static int |
| zfs_deallocate(struct vop_deallocate_args *ap) |
| { |
| znode_t *zp = VTOZ(ap->a_vp); |
| zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
| zilog_t *zilog; |
| off_t off, len, file_sz; |
| int error; |
| |
| ZFS_ENTER(zfsvfs); |
| ZFS_VERIFY_ZP(zp); |
| |
| /* |
| * Callers might not be able to detect properly that we are read-only, |
| * so check it explicitly here. |
| */ |
| if (zfs_is_readonly(zfsvfs)) { |
| ZFS_EXIT(zfsvfs); |
| return (SET_ERROR(EROFS)); |
| } |
| |
| zilog = zfsvfs->z_log; |
| off = *ap->a_offset; |
| len = *ap->a_len; |
| file_sz = zp->z_size; |
| if (off + len > file_sz) |
| len = file_sz - off; |
| /* Fast path for out-of-range request. */ |
| if (len <= 0) { |
| *ap->a_len = 0; |
| ZFS_EXIT(zfsvfs); |
| return (0); |
| } |
| |
| error = zfs_freesp(zp, off, len, O_RDWR, TRUE); |
| if (error == 0) { |
| if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS || |
| (ap->a_ioflag & IO_SYNC) != 0) |
| zil_commit(zilog, zp->z_id); |
| *ap->a_offset = off + len; |
| *ap->a_len = 0; |
| } |
| |
| ZFS_EXIT(zfsvfs); |
| return (error); |
| } |
| #endif |
| |
| struct vop_vector zfs_vnodeops; |
| struct vop_vector zfs_fifoops; |
| struct vop_vector zfs_shareops; |
| |
| struct vop_vector zfs_vnodeops = { |
| .vop_default = &default_vnodeops, |
| .vop_inactive = zfs_freebsd_inactive, |
| #if __FreeBSD_version >= 1300042 |
| .vop_need_inactive = zfs_freebsd_need_inactive, |
| #endif |
| .vop_reclaim = zfs_freebsd_reclaim, |
| #if __FreeBSD_version >= 1300102 |
| .vop_fplookup_vexec = zfs_freebsd_fplookup_vexec, |
| #endif |
| #if __FreeBSD_version >= 1300139 |
| .vop_fplookup_symlink = zfs_freebsd_fplookup_symlink, |
| #endif |
| .vop_access = zfs_freebsd_access, |
| .vop_allocate = VOP_EINVAL, |
| #if __FreeBSD_version >= 1400032 |
| .vop_deallocate = zfs_deallocate, |
| #endif |
| .vop_lookup = zfs_cache_lookup, |
| .vop_cachedlookup = zfs_freebsd_cachedlookup, |
| .vop_getattr = zfs_freebsd_getattr, |
| .vop_setattr = zfs_freebsd_setattr, |
| .vop_create = zfs_freebsd_create, |
| .vop_mknod = (vop_mknod_t *)zfs_freebsd_create, |
| .vop_mkdir = zfs_freebsd_mkdir, |
| .vop_readdir = zfs_freebsd_readdir, |
| .vop_fsync = zfs_freebsd_fsync, |
| .vop_open = zfs_freebsd_open, |
| .vop_close = zfs_freebsd_close, |
| .vop_rmdir = zfs_freebsd_rmdir, |
| .vop_ioctl = zfs_freebsd_ioctl, |
| .vop_link = zfs_freebsd_link, |
| .vop_symlink = zfs_freebsd_symlink, |
| .vop_readlink = zfs_freebsd_readlink, |
| .vop_read = zfs_freebsd_read, |
| .vop_write = zfs_freebsd_write, |
| .vop_remove = zfs_freebsd_remove, |
| .vop_rename = zfs_freebsd_rename, |
| .vop_pathconf = zfs_freebsd_pathconf, |
| .vop_bmap = zfs_freebsd_bmap, |
| .vop_fid = zfs_freebsd_fid, |
| .vop_getextattr = zfs_getextattr, |
| .vop_deleteextattr = zfs_deleteextattr, |
| .vop_setextattr = zfs_setextattr, |
| .vop_listextattr = zfs_listextattr, |
| .vop_getacl = zfs_freebsd_getacl, |
| .vop_setacl = zfs_freebsd_setacl, |
| .vop_aclcheck = zfs_freebsd_aclcheck, |
| .vop_getpages = zfs_freebsd_getpages, |
| .vop_putpages = zfs_freebsd_putpages, |
| .vop_vptocnp = zfs_vptocnp, |
| #if __FreeBSD_version >= 1300064 |
| .vop_lock1 = vop_lock, |
| .vop_unlock = vop_unlock, |
| .vop_islocked = vop_islocked, |
| #endif |
| #if __FreeBSD_version >= 1400043 |
| .vop_add_writecount = vop_stdadd_writecount_nomsync, |
| #endif |
| }; |
| VFS_VOP_VECTOR_REGISTER(zfs_vnodeops); |
| |
| struct vop_vector zfs_fifoops = { |
| .vop_default = &fifo_specops, |
| .vop_fsync = zfs_freebsd_fsync, |
| #if __FreeBSD_version >= 1300102 |
| .vop_fplookup_vexec = zfs_freebsd_fplookup_vexec, |
| #endif |
| #if __FreeBSD_version >= 1300139 |
| .vop_fplookup_symlink = zfs_freebsd_fplookup_symlink, |
| #endif |
| .vop_access = zfs_freebsd_access, |
| .vop_getattr = zfs_freebsd_getattr, |
| .vop_inactive = zfs_freebsd_inactive, |
| .vop_read = VOP_PANIC, |
| .vop_reclaim = zfs_freebsd_reclaim, |
| .vop_setattr = zfs_freebsd_setattr, |
| .vop_write = VOP_PANIC, |
| .vop_pathconf = zfs_freebsd_pathconf, |
| .vop_fid = zfs_freebsd_fid, |
| .vop_getacl = zfs_freebsd_getacl, |
| .vop_setacl = zfs_freebsd_setacl, |
| .vop_aclcheck = zfs_freebsd_aclcheck, |
| #if __FreeBSD_version >= 1400043 |
| .vop_add_writecount = vop_stdadd_writecount_nomsync, |
| #endif |
| }; |
| VFS_VOP_VECTOR_REGISTER(zfs_fifoops); |
| |
| /* |
| * special share hidden files vnode operations template |
| */ |
| struct vop_vector zfs_shareops = { |
| .vop_default = &default_vnodeops, |
| #if __FreeBSD_version >= 1300121 |
| .vop_fplookup_vexec = VOP_EAGAIN, |
| #endif |
| #if __FreeBSD_version >= 1300139 |
| .vop_fplookup_symlink = VOP_EAGAIN, |
| #endif |
| .vop_access = zfs_freebsd_access, |
| .vop_inactive = zfs_freebsd_inactive, |
| .vop_reclaim = zfs_freebsd_reclaim, |
| .vop_fid = zfs_freebsd_fid, |
| .vop_pathconf = zfs_freebsd_pathconf, |
| #if __FreeBSD_version >= 1400043 |
| .vop_add_writecount = vop_stdadd_writecount_nomsync, |
| #endif |
| }; |
| VFS_VOP_VECTOR_REGISTER(zfs_shareops); |