/*
* 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) 2015 by Delphix. All rights reserved.
* Copyright (c) 2014 Integros [integros.com]
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sysmacros.h>
#include <sys/cmn_err.h>
#include <sys/kmem.h>
#include <sys/thread.h>
#include <sys/file.h>
#include <sys/vfs.h>
#include <sys/zfs_znode.h>
#include <sys/zfs_dir.h>
#include <sys/zil.h>
#include <sys/zil_impl.h>
#include <sys/byteorder.h>
#include <sys/policy.h>
#include <sys/stat.h>
#include <sys/mode.h>
#include <sys/acl.h>
#include <sys/dmu.h>
#include <sys/spa.h>
#include <sys/zfs_fuid.h>
#include <sys/ddi.h>
#include <sys/dsl_dataset.h>
/*
* These zfs_log_* functions must be called within a dmu tx, in one
* of 2 contexts depending on zilog->z_replay:
*
* Non replay mode
* ---------------
* We need to record the transaction so that if it is committed to
* the Intent Log then it can be replayed. An intent log transaction
* structure (itx_t) is allocated and all the information necessary to
* possibly replay the transaction is saved in it. The itx is then assigned
* a sequence number and inserted in the in-memory list anchored in the zilog.
*
* Replay mode
* -----------
* We need to mark the intent log record as replayed in the log header.
* This is done in the same transaction as the replay so that they
* commit atomically.
*/
int
zfs_log_create_txtype(zil_create_t type, vsecattr_t *vsecp, vattr_t *vap)
{
int isxvattr = (vap->va_mask & AT_XVATTR);
switch (type) {
case Z_FILE:
if (vsecp == NULL && !isxvattr)
return (TX_CREATE);
if (vsecp && isxvattr)
return (TX_CREATE_ACL_ATTR);
if (vsecp)
return (TX_CREATE_ACL);
else
return (TX_CREATE_ATTR);
/*NOTREACHED*/
case Z_DIR:
if (vsecp == NULL && !isxvattr)
return (TX_MKDIR);
if (vsecp && isxvattr)
return (TX_MKDIR_ACL_ATTR);
if (vsecp)
return (TX_MKDIR_ACL);
else
return (TX_MKDIR_ATTR);
case Z_XATTRDIR:
return (TX_MKXATTR);
}
ASSERT(0);
return (TX_MAX_TYPE);
}
/*
* build up the log data necessary for logging xvattr_t
* First lr_attr_t is initialized. following the lr_attr_t
* is the mapsize and attribute bitmap copied from the xvattr_t.
* Following the bitmap and bitmapsize two 64 bit words are reserved
* for the create time which may be set. Following the create time
* records a single 64 bit integer which has the bits to set on
* replay for the xvattr.
*/
static void
zfs_log_xvattr(lr_attr_t *lrattr, xvattr_t *xvap)
{
uint32_t *bitmap;
uint64_t *attrs;
uint64_t *crtime;
xoptattr_t *xoap;
void *scanstamp;
int i;
xoap = xva_getxoptattr(xvap);
ASSERT(xoap);
lrattr->lr_attr_masksize = xvap->xva_mapsize;
bitmap = &lrattr->lr_attr_bitmap;
for (i = 0; i != xvap->xva_mapsize; i++, bitmap++) {
*bitmap = xvap->xva_reqattrmap[i];
}
/* Now pack the attributes up in a single uint64_t */
attrs = (uint64_t *)bitmap;
crtime = attrs + 1;
scanstamp = (caddr_t)(crtime + 2);
*attrs = 0;
if (XVA_ISSET_REQ(xvap, XAT_READONLY))
*attrs |= (xoap->xoa_readonly == 0) ? 0 :
XAT0_READONLY;
if (XVA_ISSET_REQ(xvap, XAT_HIDDEN))
*attrs |= (xoap->xoa_hidden == 0) ? 0 :
XAT0_HIDDEN;
if (XVA_ISSET_REQ(xvap, XAT_SYSTEM))
*attrs |= (xoap->xoa_system == 0) ? 0 :
XAT0_SYSTEM;
if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE))
*attrs |= (xoap->xoa_archive == 0) ? 0 :
XAT0_ARCHIVE;
if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE))
*attrs |= (xoap->xoa_immutable == 0) ? 0 :
XAT0_IMMUTABLE;
if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK))
*attrs |= (xoap->xoa_nounlink == 0) ? 0 :
XAT0_NOUNLINK;
if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY))
*attrs |= (xoap->xoa_appendonly == 0) ? 0 :
XAT0_APPENDONLY;
if (XVA_ISSET_REQ(xvap, XAT_OPAQUE))
*attrs |= (xoap->xoa_opaque == 0) ? 0 :
XAT0_APPENDONLY;
if (XVA_ISSET_REQ(xvap, XAT_NODUMP))
*attrs |= (xoap->xoa_nodump == 0) ? 0 :
XAT0_NODUMP;
if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED))
*attrs |= (xoap->xoa_av_quarantined == 0) ? 0 :
XAT0_AV_QUARANTINED;
if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED))
*attrs |= (xoap->xoa_av_modified == 0) ? 0 :
XAT0_AV_MODIFIED;
if (XVA_ISSET_REQ(xvap, XAT_CREATETIME))
ZFS_TIME_ENCODE(&xoap->xoa_createtime, crtime);
if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP))
bcopy(xoap->xoa_av_scanstamp, scanstamp, AV_SCANSTAMP_SZ);
if (XVA_ISSET_REQ(xvap, XAT_REPARSE))
*attrs |= (xoap->xoa_reparse == 0) ? 0 :
XAT0_REPARSE;
if (XVA_ISSET_REQ(xvap, XAT_OFFLINE))
*attrs |= (xoap->xoa_offline == 0) ? 0 :
XAT0_OFFLINE;
if (XVA_ISSET_REQ(xvap, XAT_SPARSE))
*attrs |= (xoap->xoa_sparse == 0) ? 0 :
XAT0_SPARSE;
}
static void *
zfs_log_fuid_ids(zfs_fuid_info_t *fuidp, void *start)
{
zfs_fuid_t *zfuid;
uint64_t *fuidloc = start;
/* First copy in the ACE FUIDs */
for (zfuid = list_head(&fuidp->z_fuids); zfuid;
zfuid = list_next(&fuidp->z_fuids, zfuid)) {
*fuidloc++ = zfuid->z_logfuid;
}
return (fuidloc);
}
static void *
zfs_log_fuid_domains(zfs_fuid_info_t *fuidp, void *start)
{
zfs_fuid_domain_t *zdomain;
/* now copy in the domain info, if any */
if (fuidp->z_domain_str_sz != 0) {
for (zdomain = list_head(&fuidp->z_domains); zdomain;
zdomain = list_next(&fuidp->z_domains, zdomain)) {
bcopy((void *)zdomain->z_domain, start,
strlen(zdomain->z_domain) + 1);
start = (caddr_t)start +
strlen(zdomain->z_domain) + 1;
}
}
return (start);
}
/*
* Handles TX_CREATE, TX_CREATE_ATTR, TX_MKDIR, TX_MKDIR_ATTR and
* TK_MKXATTR transactions.
*
* TX_CREATE and TX_MKDIR are standard creates, but they may have FUID
* domain information appended prior to the name. In this case the
* uid/gid in the log record will be a log centric FUID.
*
* TX_CREATE_ACL_ATTR and TX_MKDIR_ACL_ATTR handle special creates that
* may contain attributes, ACL and optional fuid information.
*
* TX_CREATE_ACL and TX_MKDIR_ACL handle special creates that specify
* and ACL and normal users/groups in the ACEs.
*
* There may be an optional xvattr attribute information similar
* to zfs_log_setattr.
*
* Also, after the file name "domain" strings may be appended.
*/
void
zfs_log_create(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
znode_t *dzp, znode_t *zp, char *name, vsecattr_t *vsecp,
zfs_fuid_info_t *fuidp, vattr_t *vap)
{
itx_t *itx;
lr_create_t *lr;
lr_acl_create_t *lracl;
size_t aclsize = (vsecp != NULL) ? vsecp->vsa_aclentsz : 0;
size_t xvatsize = 0;
size_t txsize;
xvattr_t *xvap = (xvattr_t *)vap;
void *end;
size_t lrsize;
size_t namesize = strlen(name) + 1;
size_t fuidsz = 0;
if (zil_replaying(zilog, tx))
return;
/*
* If we have FUIDs present then add in space for
* domains and ACE fuid's if any.
*/
if (fuidp) {
fuidsz += fuidp->z_domain_str_sz;
fuidsz += fuidp->z_fuid_cnt * sizeof (uint64_t);
}
if (vap->va_mask & AT_XVATTR)
xvatsize = ZIL_XVAT_SIZE(xvap->xva_mapsize);
if ((int)txtype == TX_CREATE_ATTR || (int)txtype == TX_MKDIR_ATTR ||
(int)txtype == TX_CREATE || (int)txtype == TX_MKDIR ||
(int)txtype == TX_MKXATTR) {
txsize = sizeof (*lr) + namesize + fuidsz + xvatsize;
lrsize = sizeof (*lr);
} else {
txsize =
sizeof (lr_acl_create_t) + namesize + fuidsz +
ZIL_ACE_LENGTH(aclsize) + xvatsize;
lrsize = sizeof (lr_acl_create_t);
}
itx = zil_itx_create(txtype, txsize);
lr = (lr_create_t *)&itx->itx_lr;
lr->lr_doid = dzp->z_id;
lr->lr_foid = zp->z_id;
lr->lr_mode = zp->z_mode;
if (!IS_EPHEMERAL(zp->z_uid)) {
lr->lr_uid = (uint64_t)zp->z_uid;
} else {
lr->lr_uid = fuidp->z_fuid_owner;
}
if (!IS_EPHEMERAL(zp->z_gid)) {
lr->lr_gid = (uint64_t)zp->z_gid;
} else {
lr->lr_gid = fuidp->z_fuid_group;
}
(void) sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zp->z_zfsvfs), &lr->lr_gen,
sizeof (uint64_t));
(void) sa_lookup(zp->z_sa_hdl, SA_ZPL_CRTIME(zp->z_zfsvfs),
lr->lr_crtime, sizeof (uint64_t) * 2);
if (sa_lookup(zp->z_sa_hdl, SA_ZPL_RDEV(zp->z_zfsvfs), &lr->lr_rdev,
sizeof (lr->lr_rdev)) != 0)
lr->lr_rdev = 0;
/*
* Fill in xvattr info if any
*/
if (vap->va_mask & AT_XVATTR) {
zfs_log_xvattr((lr_attr_t *)((caddr_t)lr + lrsize), xvap);
end = (caddr_t)lr + lrsize + xvatsize;
} else {
end = (caddr_t)lr + lrsize;
}
/* Now fill in any ACL info */
if (vsecp) {
lracl = (lr_acl_create_t *)&itx->itx_lr;
lracl->lr_aclcnt = vsecp->vsa_aclcnt;
lracl->lr_acl_bytes = aclsize;
lracl->lr_domcnt = fuidp ? fuidp->z_domain_cnt : 0;
lracl->lr_fuidcnt = fuidp ? fuidp->z_fuid_cnt : 0;
if (vsecp->vsa_aclflags & VSA_ACE_ACLFLAGS)
lracl->lr_acl_flags = (uint64_t)vsecp->vsa_aclflags;
else
lracl->lr_acl_flags = 0;
bcopy(vsecp->vsa_aclentp, end, aclsize);
end = (caddr_t)end + ZIL_ACE_LENGTH(aclsize);
}
/* drop in FUID info */
if (fuidp) {
end = zfs_log_fuid_ids(fuidp, end);
end = zfs_log_fuid_domains(fuidp, end);
}
/*
* Now place file name in log record
*/
bcopy(name, end, namesize);
zil_itx_assign(zilog, itx, tx);
}
/*
* Handles both TX_REMOVE and TX_RMDIR transactions.
*/
void
zfs_log_remove(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
znode_t *dzp, char *name, uint64_t foid)
{
itx_t *itx;
lr_remove_t *lr;
size_t namesize = strlen(name) + 1;
if (zil_replaying(zilog, tx))
return;
itx = zil_itx_create(txtype, sizeof (*lr) + namesize);
lr = (lr_remove_t *)&itx->itx_lr;
lr->lr_doid = dzp->z_id;
bcopy(name, (char *)(lr + 1), namesize);
itx->itx_oid = foid;
zil_itx_assign(zilog, itx, tx);
}
/*
* Handles TX_LINK transactions.
*/
void
zfs_log_link(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
znode_t *dzp, znode_t *zp, char *name)
{
itx_t *itx;
lr_link_t *lr;
size_t namesize = strlen(name) + 1;
if (zil_replaying(zilog, tx))
return;
itx = zil_itx_create(txtype, sizeof (*lr) + namesize);
lr = (lr_link_t *)&itx->itx_lr;
lr->lr_doid = dzp->z_id;
lr->lr_link_obj = zp->z_id;
bcopy(name, (char *)(lr + 1), namesize);
zil_itx_assign(zilog, itx, tx);
}
/*
* Handles TX_SYMLINK transactions.
*/
void
zfs_log_symlink(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
znode_t *dzp, znode_t *zp, char *name, char *link)
{
itx_t *itx;
lr_create_t *lr;
size_t namesize = strlen(name) + 1;
size_t linksize = strlen(link) + 1;
if (zil_replaying(zilog, tx))
return;
itx = zil_itx_create(txtype, sizeof (*lr) + namesize + linksize);
lr = (lr_create_t *)&itx->itx_lr;
lr->lr_doid = dzp->z_id;
lr->lr_foid = zp->z_id;
lr->lr_uid = zp->z_uid;
lr->lr_gid = zp->z_gid;
lr->lr_mode = zp->z_mode;
(void) sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zp->z_zfsvfs), &lr->lr_gen,
sizeof (uint64_t));
(void) sa_lookup(zp->z_sa_hdl, SA_ZPL_CRTIME(zp->z_zfsvfs),
lr->lr_crtime, sizeof (uint64_t) * 2);
bcopy(name, (char *)(lr + 1), namesize);
bcopy(link, (char *)(lr + 1) + namesize, linksize);
zil_itx_assign(zilog, itx, tx);
}
/*
* Handles TX_RENAME transactions.
*/
void
zfs_log_rename(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
znode_t *sdzp, char *sname, znode_t *tdzp, char *dname, znode_t *szp)
{
itx_t *itx;
lr_rename_t *lr;
size_t snamesize = strlen(sname) + 1;
size_t dnamesize = strlen(dname) + 1;
if (zil_replaying(zilog, tx))
return;
itx = zil_itx_create(txtype, sizeof (*lr) + snamesize + dnamesize);
lr = (lr_rename_t *)&itx->itx_lr;
lr->lr_sdoid = sdzp->z_id;
lr->lr_tdoid = tdzp->z_id;
bcopy(sname, (char *)(lr + 1), snamesize);
bcopy(dname, (char *)(lr + 1) + snamesize, dnamesize);
itx->itx_oid = szp->z_id;
zil_itx_assign(zilog, itx, tx);
}
/*
* Handles TX_WRITE transactions.
*/
ssize_t zfs_immediate_write_sz = 32768;
void
zfs_log_write(zilog_t *zilog, dmu_tx_t *tx, int txtype,
znode_t *zp, offset_t off, ssize_t resid, int ioflag)
{
itx_wr_state_t write_state;
boolean_t slogging;
uintptr_t fsync_cnt;
ssize_t immediate_write_sz;
if (zil_replaying(zilog, tx) || zp->z_unlinked)
return;
immediate_write_sz = (zilog->zl_logbias == ZFS_LOGBIAS_THROUGHPUT)
? 0 : zfs_immediate_write_sz;
slogging = spa_has_slogs(zilog->zl_spa) &&
(zilog->zl_logbias == ZFS_LOGBIAS_LATENCY);
if (resid > immediate_write_sz && !slogging && resid <= zp->z_blksz)
write_state = WR_INDIRECT;
else if (ioflag & (FSYNC | FDSYNC))
write_state = WR_COPIED;
else
write_state = WR_NEED_COPY;
if ((fsync_cnt = (uintptr_t)tsd_get(zfs_fsyncer_key)) != 0) {
(void) tsd_set(zfs_fsyncer_key, (void *)(fsync_cnt - 1));
}
while (resid) {
itx_t *itx;
lr_write_t *lr;
ssize_t len;
/*
* If the write would overflow the largest block then split it.
*/
if (write_state != WR_INDIRECT && resid > ZIL_MAX_LOG_DATA)
len = SPA_OLD_MAXBLOCKSIZE >> 1;
else
len = resid;
itx = zil_itx_create(txtype, sizeof (*lr) +
(write_state == WR_COPIED ? len : 0));
lr = (lr_write_t *)&itx->itx_lr;
if (write_state == WR_COPIED && dmu_read(zp->z_zfsvfs->z_os,
zp->z_id, off, len, lr + 1, DMU_READ_NO_PREFETCH) != 0) {
zil_itx_destroy(itx);
itx = zil_itx_create(txtype, sizeof (*lr));
lr = (lr_write_t *)&itx->itx_lr;
write_state = WR_NEED_COPY;
}
itx->itx_wr_state = write_state;
if (write_state == WR_NEED_COPY)
itx->itx_sod += len;
lr->lr_foid = zp->z_id;
lr->lr_offset = off;
lr->lr_length = len;
lr->lr_blkoff = 0;
BP_ZERO(&lr->lr_blkptr);
itx->itx_private = zp->z_zfsvfs;
if (!(ioflag & (FSYNC | FDSYNC)) && (zp->z_sync_cnt == 0) &&
(fsync_cnt == 0))
itx->itx_sync = B_FALSE;
zil_itx_assign(zilog, itx, tx);
off += len;
resid -= len;
}
}
/*
* Handles TX_TRUNCATE transactions.
*/
void
zfs_log_truncate(zilog_t *zilog, dmu_tx_t *tx, int txtype,
znode_t *zp, uint64_t off, uint64_t len)
{
itx_t *itx;
lr_truncate_t *lr;
if (zil_replaying(zilog, tx) || zp->z_unlinked)
return;
itx = zil_itx_create(txtype, sizeof (*lr));
lr = (lr_truncate_t *)&itx->itx_lr;
lr->lr_foid = zp->z_id;
lr->lr_offset = off;
lr->lr_length = len;
itx->itx_sync = (zp->z_sync_cnt != 0);
zil_itx_assign(zilog, itx, tx);
}
/*
* Handles TX_SETATTR transactions.
*/
void
zfs_log_setattr(zilog_t *zilog, dmu_tx_t *tx, int txtype,
znode_t *zp, vattr_t *vap, uint_t mask_applied, zfs_fuid_info_t *fuidp)
{
itx_t *itx;
lr_setattr_t *lr;
xvattr_t *xvap = (xvattr_t *)vap;
size_t recsize = sizeof (lr_setattr_t);
void *start;
if (zil_replaying(zilog, tx) || zp->z_unlinked)
return;
/*
* If XVATTR set, then log record size needs to allow
* for lr_attr_t + xvattr mask, mapsize and create time
* plus actual attribute values
*/
if (vap->va_mask & AT_XVATTR)
recsize = sizeof (*lr) + ZIL_XVAT_SIZE(xvap->xva_mapsize);
if (fuidp)
recsize += fuidp->z_domain_str_sz;
itx = zil_itx_create(txtype, recsize);
lr = (lr_setattr_t *)&itx->itx_lr;
lr->lr_foid = zp->z_id;
lr->lr_mask = (uint64_t)mask_applied;
lr->lr_mode = (uint64_t)vap->va_mode;
if ((mask_applied & AT_UID) && IS_EPHEMERAL(vap->va_uid))
lr->lr_uid = fuidp->z_fuid_owner;
else
lr->lr_uid = (uint64_t)vap->va_uid;
if ((mask_applied & AT_GID) && IS_EPHEMERAL(vap->va_gid))
lr->lr_gid = fuidp->z_fuid_group;
else
lr->lr_gid = (uint64_t)vap->va_gid;
lr->lr_size = (uint64_t)vap->va_size;
ZFS_TIME_ENCODE(&vap->va_atime, lr->lr_atime);
ZFS_TIME_ENCODE(&vap->va_mtime, lr->lr_mtime);
start = (lr_setattr_t *)(lr + 1);
if (vap->va_mask & AT_XVATTR) {
zfs_log_xvattr((lr_attr_t *)start, xvap);
start = (caddr_t)start + ZIL_XVAT_SIZE(xvap->xva_mapsize);
}
/*
* Now stick on domain information if any on end
*/
if (fuidp)
(void) zfs_log_fuid_domains(fuidp, start);
itx->itx_sync = (zp->z_sync_cnt != 0);
zil_itx_assign(zilog, itx, tx);
}
/*
* Handles TX_ACL transactions.
*/
void
zfs_log_acl(zilog_t *zilog, dmu_tx_t *tx, znode_t *zp,
vsecattr_t *vsecp, zfs_fuid_info_t *fuidp)
{
itx_t *itx;
lr_acl_v0_t *lrv0;
lr_acl_t *lr;
int txtype;
int lrsize;
size_t txsize;
size_t aclbytes = vsecp->vsa_aclentsz;
if (zil_replaying(zilog, tx) || zp->z_unlinked)
return;
txtype = (zp->z_zfsvfs->z_version < ZPL_VERSION_FUID) ?
TX_ACL_V0 : TX_ACL;
if (txtype == TX_ACL)
lrsize = sizeof (*lr);
else
lrsize = sizeof (*lrv0);
txsize = lrsize +
((txtype == TX_ACL) ? ZIL_ACE_LENGTH(aclbytes) : aclbytes) +
(fuidp ? fuidp->z_domain_str_sz : 0) +
sizeof (uint64_t) * (fuidp ? fuidp->z_fuid_cnt : 0);
itx = zil_itx_create(txtype, txsize);
lr = (lr_acl_t *)&itx->itx_lr;
lr->lr_foid = zp->z_id;
if (txtype == TX_ACL) {
lr->lr_acl_bytes = aclbytes;
lr->lr_domcnt = fuidp ? fuidp->z_domain_cnt : 0;
lr->lr_fuidcnt = fuidp ? fuidp->z_fuid_cnt : 0;
if (vsecp->vsa_mask & VSA_ACE_ACLFLAGS)
lr->lr_acl_flags = (uint64_t)vsecp->vsa_aclflags;
else
lr->lr_acl_flags = 0;
}
lr->lr_aclcnt = (uint64_t)vsecp->vsa_aclcnt;
if (txtype == TX_ACL_V0) {
lrv0 = (lr_acl_v0_t *)lr;
bcopy(vsecp->vsa_aclentp, (ace_t *)(lrv0 + 1), aclbytes);
} else {
void *start = (ace_t *)(lr + 1);
bcopy(vsecp->vsa_aclentp, start, aclbytes);
start = (caddr_t)start + ZIL_ACE_LENGTH(aclbytes);
if (fuidp) {
start = zfs_log_fuid_ids(fuidp, start);
(void) zfs_log_fuid_domains(fuidp, start);
}
}
itx->itx_sync = (zp->z_sync_cnt != 0);
zil_itx_assign(zilog, itx, tx);
}