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-rw-r--r--sys/contrib/openzfs/module/os/freebsd/zfs/zfs_vnops_os.c5815
1 files changed, 5815 insertions, 0 deletions
diff --git a/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_vnops_os.c b/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_vnops_os.c
new file mode 100644
index 000000000000..2e8eadb5e16e
--- /dev/null
+++ b/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_vnops_os.c
@@ -0,0 +1,5815 @@
+/*
+ * 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 >= 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
+
+/*
+ * 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)
+ VERIFY(fs_vscan(vp, cr, 1) == 0);
+
+ 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;
+
+ ASSERT(vp->v_mount != NULL);
+ obj = vp->v_object;
+ ASSERT(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, 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;
+
+ ASSERT(uio->uio_segflg == UIO_NOCOPY);
+ ASSERT(vp->v_mount != NULL);
+ obj = vp->v_object;
+ ASSERT(obj != NULL);
+ ASSERT((uio->uio_loffset & PAGEOFFSET) == 0);
+
+ zfs_vmobject_wlock_12(obj);
+ for (start = uio->uio_loffset; 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;
+ uio->uio_resid -= bytes;
+ uio->uio_offset += 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, uio_t *uio)
+{
+ vnode_t *vp = ZTOV(zp);
+ vm_object_t obj;
+ int64_t start;
+ int len = nbytes;
+ int off;
+ int error = 0;
+
+ ASSERT(vp->v_mount != NULL);
+ obj = vp->v_object;
+ ASSERT(obj != NULL);
+
+ start = uio->uio_loffset;
+ 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, 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, kthread_t *td,
+ int flags, boolean_t cached)
+{
+ znode_t *zdp = VTOZ(dvp);
+ znode_t *zp;
+ zfsvfs_t *zfsvfs = zdp->z_zfsvfs;
+ 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);
+
+ *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;
+ cnp->cn_flags |= SAVENAME;
+ break;
+ }
+ /* FALLTHROUGH */
+ case DELETE:
+ if (error == 0)
+ cnp->cn_flags |= SAVENAME;
+ break;
+ }
+ }
+
+ /* 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;
+ ksid_t *ksid;
+ uid_t uid;
+ 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
+ */
+
+ ksid = crgetsid(cr, KSID_OWNER);
+ if (ksid)
+ uid = ksid_getid(ksid);
+ else
+ uid = crgetuid(cr);
+
+ 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 | SAVENAME;
+ cnp->cn_lkflags = LK_EXCLUSIVE | LK_RETRY;
+ cnp->cn_cred = kcred;
+ cnp->cn_thread = curthread;
+
+ 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,
+ curthread, 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;
+ ksid_t *ksid;
+ uid_t uid;
+ gid_t gid = crgetgid(cr);
+ zfs_acl_ids_t acl_ids;
+ boolean_t fuid_dirtied;
+
+ ASSERT(vap->va_type == VDIR);
+
+ /*
+ * If we have an ephemeral id, ACL, or XVATTR then
+ * make sure file system is at proper version
+ */
+
+ ksid = crgetsid(cr, KSID_OWNER);
+ if (ksid)
+ uid = ksid_getid(ksid);
+ else
+ uid = crgetuid(cr);
+ 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, uio_t *uio, cred_t *cr, int *eofp,
+ int *ncookies, ulong_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;
+ ulong_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 (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 = uio->uio_loffset;
+ 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 = uio->uio_iov;
+ bytes_wanted = iovp->iov_len;
+ if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 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 = uio->uio_resid / (sizeof (struct dirent) -
+ sizeof (((struct dirent *)NULL)->d_name) + 1);
+ cooks = malloc(ncooks * sizeof (ulong_t), 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;
+
+ ASSERT(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 (uio->uio_segflg == UIO_SYSSPACE && uio->uio_iovcnt == 1) {
+ iovp->iov_base += outcount;
+ iovp->iov_len -= outcount;
+ uio->uio_resid -= outcount;
+ } else if ((error = uiomove(outbuf, (long)outcount, UIO_READ, uio))) {
+ /*
+ * Reset the pointer.
+ */
+ offset = uio->uio_loffset;
+ }
+
+update:
+ zap_cursor_fini(&zc);
+ if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
+ kmem_free(outbuf, bufsize);
+
+ if (error == ENOENT)
+ error = 0;
+
+ ZFS_ACCESSTIME_STAMP(zfsvfs, zp);
+
+ uio->uio_loffset = 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_seq = zp->z_seq;
+ 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 = zfsvfs->z_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);
+
+ 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);
+ ASSERT(err == 0);
+ if (attrzp) {
+ err = zfs_acl_chown_setattr(attrzp);
+ ASSERT(err == 0);
+ }
+ }
+
+ 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;
+ ASSERT3U((uintptr_t)aclp, !=, 0);
+ 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))
+ ASSERT(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);
+ ASSERT(err2 == 0);
+ }
+
+ 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);
+}
+
+/*
+ * 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)
+{
+ zfsvfs_t *zfsvfs;
+ struct vnode *nvp, *svp, *tvp;
+ znode_t *sdzp, *tdzp, *szp, *tzp;
+ const char *snm = scnp->cn_nameptr;
+ const char *tnm = tcnp->cn_nameptr;
+ int error;
+
+ VOP_UNLOCK1(tdvp);
+ if (*tvpp != NULL && *tvpp != tdvp)
+ VOP_UNLOCK1(*tvpp);
+
+relock:
+ error = vn_lock(sdvp, LK_EXCLUSIVE);
+ if (error)
+ goto out;
+ sdzp = VTOZ(sdvp);
+
+ 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);
+
+ /*
+ * 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);
+
+ /*
+ * We can not use ZFS_VERIFY_ZP() here because it could directly return
+ * bypassing the cleanup code in the case of an error.
+ */
+ if (tdzp->z_sa_hdl == NULL || sdzp->z_sa_hdl == NULL) {
+ ZFS_EXIT(zfsvfs);
+ VOP_UNLOCK1(sdvp);
+ VOP_UNLOCK1(tdvp);
+ error = SET_ERROR(EIO);
+ goto out;
+ }
+
+ /*
+ * Re-resolve svp to be certain it still exists and fetch the
+ * correct vnode.
+ */
+ error = zfs_dirent_lookup(sdzp, snm, &szp, ZEXISTS);
+ if (error != 0) {
+ /* Source entry invalid or not there. */
+ ZFS_EXIT(zfsvfs);
+ VOP_UNLOCK1(sdvp);
+ VOP_UNLOCK1(tdvp);
+ if ((scnp->cn_flags & ISDOTDOT) != 0 ||
+ (scnp->cn_namelen == 1 && scnp->cn_nameptr[0] == '.'))
+ error = SET_ERROR(EINVAL);
+ goto out;
+ }
+ svp = ZTOV(szp);
+
+ /*
+ * Re-resolve tvp, if it disappeared we just carry on.
+ */
+ error = zfs_dirent_lookup(tdzp, tnm, &tzp, 0);
+ if (error != 0) {
+ ZFS_EXIT(zfsvfs);
+ VOP_UNLOCK1(sdvp);
+ VOP_UNLOCK1(tdvp);
+ vrele(svp);
+ if ((tcnp->cn_flags & ISDOTDOT) != 0)
+ error = SET_ERROR(EINVAL);
+ goto out;
+ }
+ if (tzp != NULL)
+ tvp = ZTOV(tzp);
+ else
+ tvp = NULL;
+
+ /*
+ * At present the vnode locks must be acquired before z_teardown_lock,
+ * although it would be more logical to use the opposite order.
+ */
+ ZFS_EXIT(zfsvfs);
+
+ /*
+ * 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
+
+/*
+ * 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".
+ * snm - Old entry name.
+ * tdvp - Target directory to contain the "new entry".
+ * tnm - New entry name.
+ * cr - credentials of caller.
+ * ct - caller context
+ * flags - case flags
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Timestamps:
+ * sdvp,tdvp - ctime|mtime updated
+ */
+/*ARGSUSED*/
+static int
+zfs_rename_(vnode_t *sdvp, vnode_t **svpp, struct componentname *scnp,
+ vnode_t *tdvp, vnode_t **tvpp, struct componentname *tcnp,
+ cred_t *cr, int log)
+{
+ zfsvfs_t *zfsvfs;
+ znode_t *sdzp, *tdzp, *szp, *tzp;
+ zilog_t *zilog = NULL;
+ dmu_tx_t *tx;
+ const char *snm = scnp->cn_nameptr;
+ const char *tnm = tcnp->cn_nameptr;
+ int error = 0;
+ bool want_seqc_end __maybe_unused = false;
+
+ /* 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);
+ }
+
+ tdzp = VTOZ(tdvp);
+ sdzp = VTOZ(sdvp);
+ zfsvfs = tdzp->z_zfsvfs;
+ zilog = zfsvfs->z_log;
+
+ /*
+ * After we re-enter ZFS_ENTER() we will have to revalidate all
+ * znodes involved.
+ */
+ ZFS_ENTER(zfsvfs);
+
+ if (zfsvfs->z_utf8 && u8_validate(tnm,
+ strlen(tnm), NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
+ error = SET_ERROR(EILSEQ);
+ goto unlockout;
+ }
+
+ /* If source and target are the same file, there is nothing to do. */
+ if ((*svpp) == (*tvpp)) {
+ error = 0;
+ goto unlockout;
+ }
+
+ if (((*svpp)->v_type == VDIR && (*svpp)->v_mountedhere != NULL) ||
+ ((*tvpp) != NULL && (*tvpp)->v_type == VDIR &&
+ (*tvpp)->v_mountedhere != NULL)) {
+ error = SET_ERROR(EXDEV);
+ goto unlockout;
+ }
+
+ /*
+ * We can not use ZFS_VERIFY_ZP() here because it could directly return
+ * bypassing the cleanup code in the case of an error.
+ */
+ if (tdzp->z_sa_hdl == NULL || sdzp->z_sa_hdl == NULL) {
+ error = SET_ERROR(EIO);
+ goto unlockout;
+ }
+
+ szp = VTOZ(*svpp);
+ tzp = *tvpp == NULL ? NULL : VTOZ(*tvpp);
+ if (szp->z_sa_hdl == NULL || (tzp != NULL && tzp->z_sa_hdl == NULL)) {
+ error = SET_ERROR(EIO);
+ goto unlockout;
+ }
+
+ /*
+ * 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 unlockout;
+ }
+
+ /*
+ * 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 unlockout;
+ }
+
+ /*
+ * 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 unlockout;
+
+ 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 unlockout;
+ }
+
+ /*
+ * 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 unlockout;
+ }
+
+ /*
+ * 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 unlockout;
+ } else {
+ cache_purge(tdvp);
+ if (sdvp != tdvp)
+ cache_purge(sdvp);
+ }
+ } else {
+ if ((*tvpp)->v_type == VDIR) {
+ error = SET_ERROR(EISDIR);
+ goto unlockout;
+ }
+ }
+ }
+
+ 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);
+#if __FreeBSD_version >= 1300102
+ want_seqc_end = true;
+#endif
+ 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 unlockout;
+ }
+
+
+ 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.
+ */
+ VERIFY3U(zfs_link_destroy(tdzp, tnm, szp, tx,
+ ZRENAMING, NULL), ==, 0);
+ }
+ }
+ if (error == 0) {
+ cache_vop_rename(sdvp, *svpp, tdvp, *tvpp, scnp, tcnp);
+ }
+ }
+
+ dmu_tx_commit(tx);
+
+unlockout: /* all 4 vnodes are locked, ZFS_ENTER called */
+ ZFS_EXIT(zfsvfs);
+ if (want_seqc_end) {
+ 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);
+ want_seqc_end = false;
+ }
+ VOP_UNLOCK1(*svpp);
+ VOP_UNLOCK1(sdvp);
+
+out: /* original two vnodes are locked */
+ MPASS(!want_seqc_end);
+ if (error == 0 && zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zilog, 0);
+
+ if (*tvpp != NULL)
+ VOP_UNLOCK1(*tvpp);
+ if (tdvp != *tvpp)
+ VOP_UNLOCK1(tdvp);
+ 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_rename_(sdvp, &svp, &scn, tdvp, &tvp, &tcn, cr, 0);
+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;
+
+ ASSERT(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 datsets 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, 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;
+
+ ASSERT(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;
+ objset_t *os = zp->z_zfsvfs->z_os;
+ 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(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ 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(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);
+ 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;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ object = vp->v_object;
+ pcount = btoc(len);
+ ncount = pcount;
+
+ KASSERT(ma[0]->object == object, ("mismatching object"));
+ KASSERT(len > 0 && (len & PAGE_MASK) == 0, ("unexpected length"));
+
+ for (i = 0; i < pcount; i++)
+ rtvals[i] = 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);
+ 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)
+{
+
+ return (zfs_read(VTOZ(ap->a_vp), ap->a_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)
+{
+
+ return (zfs_write(VTOZ(ap->a_vp), ap->a_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
+
+#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];
+
+ ASSERT(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, cnp->cn_thread, 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;
+
+ ASSERT(cnp->cn_flags & SAVENAME);
+
+ 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)
+{
+
+ ASSERT(ap->a_cnp->cn_flags & SAVENAME);
+
+ 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;
+
+ ASSERT(ap->a_cnp->cn_flags & SAVENAME);
+
+ 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;
+
+ ASSERT(cnp->cn_flags & SAVENAME);
+
+ 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;
+ ulong_t **a_cookies;
+};
+#endif
+
+static int
+zfs_freebsd_readdir(struct vop_readdir_args *ap)
+{
+
+ return (zfs_readdir(ap->a_vp, ap->a_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;
+
+ ASSERT(ap->a_fcnp->cn_flags & (SAVENAME|SAVESTART));
+ ASSERT(ap->a_tcnp->cn_flags & (SAVENAME|SAVESTART));
+
+ error = zfs_rename_(fdvp, &fvp, ap->a_fcnp, tdvp, &tvp,
+ ap->a_tcnp, ap->a_fcnp->cn_cred, 1);
+
+ 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;
+ int rc;
+
+ ASSERT(cnp->cn_flags & SAVENAME);
+
+ 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);
+ 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)
+{
+
+ return (zfs_readlink(ap->a_vp, ap->a_uio, ap->a_cred, NULL));
+}
+
+#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);
+
+ ASSERT(cnp->cn_flags & SAVENAME);
+
+ 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;
+};
+#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;
+
+ ASSERT(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);
+ 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 (EINVAL);
+ /* We don't allow attribute names that start with "freebsd:" string. */
+ if (strncmp(name, "freebsd:", 8) == 0)
+ return (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 (EINVAL);
+ }
+ if (snprintf(attrname, size, "%s%s%s%s", prefix, namespace, suffix,
+ name) >= size) {
+ return (ENAMETOOLONG);
+ }
+ return (0);
+}
+
+#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
+
+/*
+ * Vnode operating to retrieve a named extended attribute.
+ */
+static int
+zfs_getextattr(struct vop_getextattr_args *ap)
+{
+ zfsvfs_t *zfsvfs = VTOZ(ap->a_vp)->z_zfsvfs;
+ struct thread *td = ap->a_td;
+ struct nameidata nd;
+ char attrname[255];
+ struct vattr va;
+ vnode_t *xvp = NULL, *vp;
+ int error, flags;
+
+ /*
+ * 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);
+
+ ZFS_ENTER(zfsvfs);
+
+ error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td,
+ LOOKUP_XATTR, B_FALSE);
+ if (error != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ flags = FREAD;
+ NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, attrname,
+ xvp, td);
+ error = vn_open_cred(&nd, &flags, 0, VN_OPEN_INVFS, ap->a_cred, NULL);
+ vp = nd.ni_vp;
+ NDFREE(&nd, NDF_ONLY_PNBUF);
+ if (error != 0) {
+ ZFS_EXIT(zfsvfs);
+ if (error == ENOENT)
+ error = ENOATTR;
+ return (error);
+ }
+
+ 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);
+ ZFS_EXIT(zfsvfs);
+ 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
+
+/*
+ * Vnode operation to remove a named attribute.
+ */
+static int
+zfs_deleteextattr(struct vop_deleteextattr_args *ap)
+{
+ zfsvfs_t *zfsvfs = VTOZ(ap->a_vp)->z_zfsvfs;
+ struct thread *td = ap->a_td;
+ struct nameidata nd;
+ char attrname[255];
+ vnode_t *xvp = NULL, *vp;
+ 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);
+
+ ZFS_ENTER(zfsvfs);
+
+ error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td,
+ LOOKUP_XATTR, B_FALSE);
+ if (error != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ NDINIT_ATVP(&nd, DELETE, NOFOLLOW | LOCKPARENT | LOCKLEAF,
+ UIO_SYSSPACE, attrname, xvp, td);
+ error = namei(&nd);
+ vp = nd.ni_vp;
+ if (error != 0) {
+ ZFS_EXIT(zfsvfs);
+ NDFREE(&nd, NDF_ONLY_PNBUF);
+ if (error == ENOENT)
+ error = ENOATTR;
+ return (error);
+ }
+
+ error = VOP_REMOVE(nd.ni_dvp, vp, &nd.ni_cnd);
+ NDFREE(&nd, NDF_ONLY_PNBUF);
+
+ vput(nd.ni_dvp);
+ if (vp == nd.ni_dvp)
+ vrele(vp);
+ else
+ vput(vp);
+ ZFS_EXIT(zfsvfs);
+
+ 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
+
+/*
+ * Vnode operation to set a named attribute.
+ */
+static int
+zfs_setextattr(struct vop_setextattr_args *ap)
+{
+ zfsvfs_t *zfsvfs = VTOZ(ap->a_vp)->z_zfsvfs;
+ struct thread *td = ap->a_td;
+ struct nameidata nd;
+ char attrname[255];
+ struct vattr va;
+ vnode_t *xvp = NULL, *vp;
+ int error, flags;
+
+ /*
+ * 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);
+
+ ZFS_ENTER(zfsvfs);
+
+ error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td,
+ LOOKUP_XATTR | CREATE_XATTR_DIR, B_FALSE);
+ if (error != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ flags = FFLAGS(O_WRONLY | O_CREAT);
+ NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, attrname,
+ xvp, td);
+ error = vn_open_cred(&nd, &flags, 0600, VN_OPEN_INVFS, ap->a_cred,
+ NULL);
+ vp = nd.ni_vp;
+ NDFREE(&nd, NDF_ONLY_PNBUF);
+ if (error != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ 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);
+ 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
+
+/*
+ * Vnode operation to retrieve extended attributes on a vnode.
+ */
+static int
+zfs_listextattr(struct vop_listextattr_args *ap)
+{
+ zfsvfs_t *zfsvfs = VTOZ(ap->a_vp)->z_zfsvfs;
+ struct thread *td = ap->a_td;
+ struct nameidata nd;
+ char attrprefix[16];
+ uint8_t dirbuf[sizeof (struct dirent)];
+ struct dirent *dp;
+ struct iovec aiov;
+ struct uio auio, *uio = ap->a_uio;
+ size_t *sizep = ap->a_size;
+ size_t plen;
+ vnode_t *xvp = NULL, *vp;
+ int done, error, eof, pos;
+
+ /*
+ * 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);
+ plen = strlen(attrprefix);
+
+ ZFS_ENTER(zfsvfs);
+
+ if (sizep != NULL)
+ *sizep = 0;
+
+ error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td,
+ LOOKUP_XATTR, B_FALSE);
+ if (error != 0) {
+ ZFS_EXIT(zfsvfs);
+ /*
+ * 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);
+ }
+
+ NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | LOCKSHARED,
+ UIO_SYSSPACE, ".", xvp, td);
+ error = namei(&nd);
+ vp = nd.ni_vp;
+ NDFREE(&nd, NDF_ONLY_PNBUF);
+ if (error != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ 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;
+
+ do {
+ uint8_t nlen;
+
+ 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);
+ done = sizeof (dirbuf) - auio.uio_resid;
+ if (error != 0)
+ break;
+ for (pos = 0; pos < done; ) {
+ 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;
+ if (plen == 0 &&
+ strncmp(dp->d_name, "freebsd:", 8) == 0)
+ continue;
+ else if (strncmp(dp->d_name, attrprefix, plen) != 0)
+ continue;
+ nlen = dp->d_namlen - plen;
+ if (sizep != NULL)
+ *sizep += 1 + nlen;
+ else if (uio != NULL) {
+ /*
+ * Format of extattr name entry is one byte for
+ * length and the rest for name.
+ */
+ error = uiomove(&nlen, 1, uio->uio_rw, uio);
+ if (error == 0) {
+ error = uiomove(dp->d_name + plen, nlen,
+ uio->uio_rw, uio);
+ }
+ if (error != 0)
+ break;
+ }
+ }
+ } while (!eof && error == 0);
+
+ vput(vp);
+ 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);
+}
+
+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
+ .vop_access = zfs_freebsd_access,
+ .vop_allocate = VOP_EINVAL,
+ .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
+};
+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
+ .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,
+};
+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
+ .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,
+};
+VFS_VOP_VECTOR_REGISTER(zfs_shareops);