* CDDL HEADER END
*/
/*
- * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
- * Use is subject to license terms.
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
*/
+/* Portions Copyright 2010 Robert Milkowski */
+
#include <sys/cred.h>
#include <sys/zfs_context.h>
#include <sys/dmu_objset.h>
#include <sys/dbuf.h>
#include <sys/zvol.h>
#include <sys/dmu_tx.h>
-#include <sys/zio_checksum.h>
#include <sys/zap.h>
#include <sys/zil.h>
#include <sys/dmu_impl.h>
#include <sys/zfs_ioctl.h>
+#include <sys/sa.h>
+#include <sys/zfs_onexit.h>
+
+/*
+ * Needed to close a window in dnode_move() that allows the objset to be freed
+ * before it can be safely accessed.
+ */
+krwlock_t os_lock;
+
+void
+dmu_objset_init(void)
+{
+ rw_init(&os_lock, NULL, RW_DEFAULT, NULL);
+}
+
+void
+dmu_objset_fini(void)
+{
+ rw_destroy(&os_lock);
+}
spa_t *
dmu_objset_spa(objset_t *os)
{
- return (os->os->os_spa);
+ return (os->os_spa);
}
zilog_t *
dmu_objset_zil(objset_t *os)
{
- return (os->os->os_zil);
+ return (os->os_zil);
}
dsl_pool_t *
{
dsl_dataset_t *ds;
- if ((ds = os->os->os_dsl_dataset) != NULL && ds->ds_dir)
+ if ((ds = os->os_dsl_dataset) != NULL && ds->ds_dir)
return (ds->ds_dir->dd_pool);
else
- return (spa_get_dsl(os->os->os_spa));
+ return (spa_get_dsl(os->os_spa));
}
dsl_dataset_t *
dmu_objset_ds(objset_t *os)
{
- return (os->os->os_dsl_dataset);
+ return (os->os_dsl_dataset);
}
dmu_objset_type_t
dmu_objset_type(objset_t *os)
{
- return (os->os->os_phys->os_type);
+ return (os->os_phys->os_type);
}
void
dmu_objset_name(objset_t *os, char *buf)
{
- dsl_dataset_name(os->os->os_dsl_dataset, buf);
+ dsl_dataset_name(os->os_dsl_dataset, buf);
}
uint64_t
dmu_objset_id(objset_t *os)
{
- dsl_dataset_t *ds = os->os->os_dsl_dataset;
+ dsl_dataset_t *ds = os->os_dsl_dataset;
return (ds ? ds->ds_object : 0);
}
+uint64_t
+dmu_objset_syncprop(objset_t *os)
+{
+ return (os->os_sync);
+}
+
+uint64_t
+dmu_objset_logbias(objset_t *os)
+{
+ return (os->os_logbias);
+}
+
static void
checksum_changed_cb(void *arg, uint64_t newval)
{
- objset_impl_t *osi = arg;
+ objset_t *os = arg;
/*
* Inheritance should have been done by now.
*/
ASSERT(newval != ZIO_CHECKSUM_INHERIT);
- osi->os_checksum = zio_checksum_select(newval, ZIO_CHECKSUM_ON_VALUE);
+ os->os_checksum = zio_checksum_select(newval, ZIO_CHECKSUM_ON_VALUE);
}
static void
compression_changed_cb(void *arg, uint64_t newval)
{
- objset_impl_t *osi = arg;
+ objset_t *os = arg;
/*
* Inheritance and range checking should have been done by now.
*/
ASSERT(newval != ZIO_COMPRESS_INHERIT);
- osi->os_compress = zio_compress_select(newval, ZIO_COMPRESS_ON_VALUE);
+ os->os_compress = zio_compress_select(newval, ZIO_COMPRESS_ON_VALUE);
}
static void
copies_changed_cb(void *arg, uint64_t newval)
{
- objset_impl_t *osi = arg;
+ objset_t *os = arg;
/*
* Inheritance and range checking should have been done by now.
*/
ASSERT(newval > 0);
- ASSERT(newval <= spa_max_replication(osi->os_spa));
+ ASSERT(newval <= spa_max_replication(os->os_spa));
- osi->os_copies = newval;
+ os->os_copies = newval;
+}
+
+static void
+dedup_changed_cb(void *arg, uint64_t newval)
+{
+ objset_t *os = arg;
+ spa_t *spa = os->os_spa;
+ enum zio_checksum checksum;
+
+ /*
+ * Inheritance should have been done by now.
+ */
+ ASSERT(newval != ZIO_CHECKSUM_INHERIT);
+
+ checksum = zio_checksum_dedup_select(spa, newval, ZIO_CHECKSUM_OFF);
+
+ os->os_dedup_checksum = checksum & ZIO_CHECKSUM_MASK;
+ os->os_dedup_verify = !!(checksum & ZIO_CHECKSUM_VERIFY);
}
static void
primary_cache_changed_cb(void *arg, uint64_t newval)
{
- objset_impl_t *osi = arg;
+ objset_t *os = arg;
/*
* Inheritance and range checking should have been done by now.
ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE ||
newval == ZFS_CACHE_METADATA);
- osi->os_primary_cache = newval;
+ os->os_primary_cache = newval;
}
static void
secondary_cache_changed_cb(void *arg, uint64_t newval)
{
- objset_impl_t *osi = arg;
+ objset_t *os = arg;
/*
* Inheritance and range checking should have been done by now.
ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE ||
newval == ZFS_CACHE_METADATA);
- osi->os_secondary_cache = newval;
+ os->os_secondary_cache = newval;
+}
+
+static void
+sync_changed_cb(void *arg, uint64_t newval)
+{
+ objset_t *os = arg;
+
+ /*
+ * Inheritance and range checking should have been done by now.
+ */
+ ASSERT(newval == ZFS_SYNC_STANDARD || newval == ZFS_SYNC_ALWAYS ||
+ newval == ZFS_SYNC_DISABLED);
+
+ os->os_sync = newval;
+ if (os->os_zil)
+ zil_set_sync(os->os_zil, newval);
+}
+
+static void
+logbias_changed_cb(void *arg, uint64_t newval)
+{
+ objset_t *os = arg;
+
+ ASSERT(newval == ZFS_LOGBIAS_LATENCY ||
+ newval == ZFS_LOGBIAS_THROUGHPUT);
+ os->os_logbias = newval;
+ if (os->os_zil)
+ zil_set_logbias(os->os_zil, newval);
}
void
int
dmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
- objset_impl_t **osip)
+ objset_t **osp)
{
- objset_impl_t *osi;
+ objset_t *os;
int i, err;
ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock));
- osi = kmem_zalloc(sizeof (objset_impl_t), KM_SLEEP);
- osi->os.os = osi;
- osi->os_dsl_dataset = ds;
- osi->os_spa = spa;
- osi->os_rootbp = bp;
- if (!BP_IS_HOLE(osi->os_rootbp)) {
+ os = kmem_zalloc(sizeof (objset_t), KM_PUSHPAGE);
+ os->os_dsl_dataset = ds;
+ os->os_spa = spa;
+ os->os_rootbp = bp;
+ if (!BP_IS_HOLE(os->os_rootbp)) {
uint32_t aflags = ARC_WAIT;
zbookmark_t zb;
- zb.zb_objset = ds ? ds->ds_object : 0;
- zb.zb_object = 0;
- zb.zb_level = -1;
- zb.zb_blkid = 0;
- if (DMU_OS_IS_L2CACHEABLE(osi))
+ SET_BOOKMARK(&zb, ds ? ds->ds_object : DMU_META_OBJSET,
+ ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
+
+ if (DMU_OS_IS_L2CACHEABLE(os))
aflags |= ARC_L2CACHE;
+ if (DMU_OS_IS_L2COMPRESSIBLE(os))
+ aflags |= ARC_L2COMPRESS;
- dprintf_bp(osi->os_rootbp, "reading %s", "");
- /*
- * NB: when bprewrite scrub can change the bp,
- * and this is called from dmu_objset_open_ds_os, the bp
- * could change, and we'll need a lock.
- */
- err = arc_read_nolock(NULL, spa, osi->os_rootbp,
- arc_getbuf_func, &osi->os_phys_buf,
+ dprintf_bp(os->os_rootbp, "reading %s", "");
+ err = arc_read(NULL, spa, os->os_rootbp,
+ arc_getbuf_func, &os->os_phys_buf,
ZIO_PRIORITY_SYNC_READ, ZIO_FLAG_CANFAIL, &aflags, &zb);
if (err) {
- kmem_free(osi, sizeof (objset_impl_t));
+ kmem_free(os, sizeof (objset_t));
/* convert checksum errors into IO errors */
if (err == ECKSUM)
err = EIO;
/* Increase the blocksize if we are permitted. */
if (spa_version(spa) >= SPA_VERSION_USERSPACE &&
- arc_buf_size(osi->os_phys_buf) < sizeof (objset_phys_t)) {
+ arc_buf_size(os->os_phys_buf) < sizeof (objset_phys_t)) {
arc_buf_t *buf = arc_buf_alloc(spa,
- sizeof (objset_phys_t), &osi->os_phys_buf,
+ sizeof (objset_phys_t), &os->os_phys_buf,
ARC_BUFC_METADATA);
bzero(buf->b_data, sizeof (objset_phys_t));
- bcopy(osi->os_phys_buf->b_data, buf->b_data,
- arc_buf_size(osi->os_phys_buf));
- (void) arc_buf_remove_ref(osi->os_phys_buf,
- &osi->os_phys_buf);
- osi->os_phys_buf = buf;
+ bcopy(os->os_phys_buf->b_data, buf->b_data,
+ arc_buf_size(os->os_phys_buf));
+ (void) arc_buf_remove_ref(os->os_phys_buf,
+ &os->os_phys_buf);
+ os->os_phys_buf = buf;
}
- osi->os_phys = osi->os_phys_buf->b_data;
- osi->os_flags = osi->os_phys->os_flags;
+ os->os_phys = os->os_phys_buf->b_data;
+ os->os_flags = os->os_phys->os_flags;
} else {
int size = spa_version(spa) >= SPA_VERSION_USERSPACE ?
sizeof (objset_phys_t) : OBJSET_OLD_PHYS_SIZE;
- osi->os_phys_buf = arc_buf_alloc(spa, size,
- &osi->os_phys_buf, ARC_BUFC_METADATA);
- osi->os_phys = osi->os_phys_buf->b_data;
- bzero(osi->os_phys, size);
+ os->os_phys_buf = arc_buf_alloc(spa, size,
+ &os->os_phys_buf, ARC_BUFC_METADATA);
+ os->os_phys = os->os_phys_buf->b_data;
+ bzero(os->os_phys, size);
}
/*
*/
if (ds) {
err = dsl_prop_register(ds, "primarycache",
- primary_cache_changed_cb, osi);
+ primary_cache_changed_cb, os);
if (err == 0)
err = dsl_prop_register(ds, "secondarycache",
- secondary_cache_changed_cb, osi);
+ secondary_cache_changed_cb, os);
if (!dsl_dataset_is_snapshot(ds)) {
if (err == 0)
err = dsl_prop_register(ds, "checksum",
- checksum_changed_cb, osi);
+ checksum_changed_cb, os);
if (err == 0)
err = dsl_prop_register(ds, "compression",
- compression_changed_cb, osi);
+ compression_changed_cb, os);
if (err == 0)
err = dsl_prop_register(ds, "copies",
- copies_changed_cb, osi);
+ copies_changed_cb, os);
+ if (err == 0)
+ err = dsl_prop_register(ds, "dedup",
+ dedup_changed_cb, os);
+ if (err == 0)
+ err = dsl_prop_register(ds, "logbias",
+ logbias_changed_cb, os);
+ if (err == 0)
+ err = dsl_prop_register(ds, "sync",
+ sync_changed_cb, os);
}
if (err) {
- VERIFY(arc_buf_remove_ref(osi->os_phys_buf,
- &osi->os_phys_buf) == 1);
- kmem_free(osi, sizeof (objset_impl_t));
+ VERIFY(arc_buf_remove_ref(os->os_phys_buf,
+ &os->os_phys_buf) == 1);
+ kmem_free(os, sizeof (objset_t));
return (err);
}
} else if (ds == NULL) {
/* It's the meta-objset. */
- osi->os_checksum = ZIO_CHECKSUM_FLETCHER_4;
- osi->os_compress = ZIO_COMPRESS_LZJB;
- osi->os_copies = spa_max_replication(spa);
- osi->os_primary_cache = ZFS_CACHE_ALL;
- osi->os_secondary_cache = ZFS_CACHE_ALL;
+ os->os_checksum = ZIO_CHECKSUM_FLETCHER_4;
+ os->os_compress = ZIO_COMPRESS_LZJB;
+ os->os_copies = spa_max_replication(spa);
+ os->os_dedup_checksum = ZIO_CHECKSUM_OFF;
+ os->os_dedup_verify = 0;
+ os->os_logbias = 0;
+ os->os_sync = 0;
+ os->os_primary_cache = ZFS_CACHE_ALL;
+ os->os_secondary_cache = ZFS_CACHE_ALL;
}
- osi->os_zil_header = osi->os_phys->os_zil_header;
- osi->os_zil = zil_alloc(&osi->os, &osi->os_zil_header);
+ if (ds == NULL || !dsl_dataset_is_snapshot(ds))
+ os->os_zil_header = os->os_phys->os_zil_header;
+ os->os_zil = zil_alloc(os, &os->os_zil_header);
for (i = 0; i < TXG_SIZE; i++) {
- list_create(&osi->os_dirty_dnodes[i], sizeof (dnode_t),
+ list_create(&os->os_dirty_dnodes[i], sizeof (dnode_t),
offsetof(dnode_t, dn_dirty_link[i]));
- list_create(&osi->os_free_dnodes[i], sizeof (dnode_t),
+ list_create(&os->os_free_dnodes[i], sizeof (dnode_t),
offsetof(dnode_t, dn_dirty_link[i]));
}
- list_create(&osi->os_dnodes, sizeof (dnode_t),
+ list_create(&os->os_dnodes, sizeof (dnode_t),
offsetof(dnode_t, dn_link));
- list_create(&osi->os_downgraded_dbufs, sizeof (dmu_buf_impl_t),
+ list_create(&os->os_downgraded_dbufs, sizeof (dmu_buf_impl_t),
offsetof(dmu_buf_impl_t, db_link));
- mutex_init(&osi->os_lock, NULL, MUTEX_DEFAULT, NULL);
- mutex_init(&osi->os_obj_lock, NULL, MUTEX_DEFAULT, NULL);
- mutex_init(&osi->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL);
-
- osi->os_meta_dnode = dnode_special_open(osi,
- &osi->os_phys->os_meta_dnode, DMU_META_DNODE_OBJECT);
- if (arc_buf_size(osi->os_phys_buf) >= sizeof (objset_phys_t)) {
- osi->os_userused_dnode = dnode_special_open(osi,
- &osi->os_phys->os_userused_dnode, DMU_USERUSED_OBJECT);
- osi->os_groupused_dnode = dnode_special_open(osi,
- &osi->os_phys->os_groupused_dnode, DMU_GROUPUSED_OBJECT);
+ mutex_init(&os->os_lock, NULL, MUTEX_DEFAULT, NULL);
+ mutex_init(&os->os_obj_lock, NULL, MUTEX_DEFAULT, NULL);
+ mutex_init(&os->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL);
+
+ DMU_META_DNODE(os) = dnode_special_open(os,
+ &os->os_phys->os_meta_dnode, DMU_META_DNODE_OBJECT,
+ &os->os_meta_dnode);
+ if (arc_buf_size(os->os_phys_buf) >= sizeof (objset_phys_t)) {
+ DMU_USERUSED_DNODE(os) = dnode_special_open(os,
+ &os->os_phys->os_userused_dnode, DMU_USERUSED_OBJECT,
+ &os->os_userused_dnode);
+ DMU_GROUPUSED_DNODE(os) = dnode_special_open(os,
+ &os->os_phys->os_groupused_dnode, DMU_GROUPUSED_OBJECT,
+ &os->os_groupused_dnode);
}
/*
* have ds_opening_lock
*/
if (ds) {
- VERIFY(NULL == dsl_dataset_set_user_ptr(ds, osi,
- dmu_objset_evict));
+ mutex_enter(&ds->ds_lock);
+ ASSERT(ds->ds_objset == NULL);
+ ds->ds_objset = os;
+ mutex_exit(&ds->ds_lock);
}
- *osip = osi;
+ *osp = os;
return (0);
}
-static int
-dmu_objset_open_ds_os(dsl_dataset_t *ds, objset_t *os, dmu_objset_type_t type)
+int
+dmu_objset_from_ds(dsl_dataset_t *ds, objset_t **osp)
{
- objset_impl_t *osi;
+ int err = 0;
mutex_enter(&ds->ds_opening_lock);
- osi = dsl_dataset_get_user_ptr(ds);
- if (osi == NULL) {
- int err;
-
+ *osp = ds->ds_objset;
+ if (*osp == NULL) {
err = dmu_objset_open_impl(dsl_dataset_get_spa(ds),
- ds, &ds->ds_phys->ds_bp, &osi);
- if (err) {
- mutex_exit(&ds->ds_opening_lock);
- return (err);
- }
+ ds, dsl_dataset_get_blkptr(ds), osp);
}
mutex_exit(&ds->ds_opening_lock);
-
- os->os = osi;
- os->os_mode = DS_MODE_NOHOLD;
-
- if (type != DMU_OST_ANY && type != os->os->os_phys->os_type)
- return (EINVAL);
- return (0);
+ return (err);
}
+/* called from zpl */
int
-dmu_objset_open_ds(dsl_dataset_t *ds, dmu_objset_type_t type, objset_t **osp)
+dmu_objset_hold(const char *name, void *tag, objset_t **osp)
{
- objset_t *os;
+ dsl_dataset_t *ds;
int err;
- os = kmem_alloc(sizeof (objset_t), KM_SLEEP);
- err = dmu_objset_open_ds_os(ds, os, type);
+ err = dsl_dataset_hold(name, tag, &ds);
if (err)
- kmem_free(os, sizeof (objset_t));
- else
- *osp = os;
+ return (err);
+
+ err = dmu_objset_from_ds(ds, osp);
+ if (err)
+ dsl_dataset_rele(ds, tag);
+
return (err);
}
/* called from zpl */
int
-dmu_objset_open(const char *name, dmu_objset_type_t type, int mode,
- objset_t **osp)
+dmu_objset_own(const char *name, dmu_objset_type_t type,
+ boolean_t readonly, void *tag, objset_t **osp)
{
- objset_t *os;
dsl_dataset_t *ds;
int err;
- ASSERT(DS_MODE_TYPE(mode) == DS_MODE_USER ||
- DS_MODE_TYPE(mode) == DS_MODE_OWNER);
-
- os = kmem_alloc(sizeof (objset_t), KM_SLEEP);
- if (DS_MODE_TYPE(mode) == DS_MODE_USER)
- err = dsl_dataset_hold(name, os, &ds);
- else
- err = dsl_dataset_own(name, mode, os, &ds);
- if (err) {
- kmem_free(os, sizeof (objset_t));
+ err = dsl_dataset_own(name, B_FALSE, tag, &ds);
+ if (err)
return (err);
- }
- err = dmu_objset_open_ds_os(ds, os, type);
+ err = dmu_objset_from_ds(ds, osp);
if (err) {
- if (DS_MODE_TYPE(mode) == DS_MODE_USER)
- dsl_dataset_rele(ds, os);
- else
- dsl_dataset_disown(ds, os);
- kmem_free(os, sizeof (objset_t));
- } else {
- os->os_mode = mode;
- *osp = os;
+ dsl_dataset_disown(ds, tag);
+ } else if (type != DMU_OST_ANY && type != (*osp)->os_phys->os_type) {
+ dmu_objset_disown(*osp, tag);
+ return (EINVAL);
+ } else if (!readonly && dsl_dataset_is_snapshot(ds)) {
+ dmu_objset_disown(*osp, tag);
+ return (EROFS);
}
return (err);
}
void
-dmu_objset_close(objset_t *os)
+dmu_objset_rele(objset_t *os, void *tag)
{
- ASSERT(DS_MODE_TYPE(os->os_mode) == DS_MODE_USER ||
- DS_MODE_TYPE(os->os_mode) == DS_MODE_OWNER ||
- DS_MODE_TYPE(os->os_mode) == DS_MODE_NOHOLD);
+ dsl_dataset_rele(os->os_dsl_dataset, tag);
+}
- if (DS_MODE_TYPE(os->os_mode) == DS_MODE_USER)
- dsl_dataset_rele(os->os->os_dsl_dataset, os);
- else if (DS_MODE_TYPE(os->os_mode) == DS_MODE_OWNER)
- dsl_dataset_disown(os->os->os_dsl_dataset, os);
- kmem_free(os, sizeof (objset_t));
+void
+dmu_objset_disown(objset_t *os, void *tag)
+{
+ dsl_dataset_disown(os->os_dsl_dataset, tag);
}
int
dmu_objset_evict_dbufs(objset_t *os)
{
- objset_impl_t *osi = os->os;
dnode_t *dn;
- mutex_enter(&osi->os_lock);
+ mutex_enter(&os->os_lock);
/* process the mdn last, since the other dnodes have holds on it */
- list_remove(&osi->os_dnodes, osi->os_meta_dnode);
- list_insert_tail(&osi->os_dnodes, osi->os_meta_dnode);
+ list_remove(&os->os_dnodes, DMU_META_DNODE(os));
+ list_insert_tail(&os->os_dnodes, DMU_META_DNODE(os));
/*
* Find the first dnode with holds. We have to do this dance
* hold. If there are no holds then it has no dbufs so OK to
* skip.
*/
- for (dn = list_head(&osi->os_dnodes);
+ for (dn = list_head(&os->os_dnodes);
dn && !dnode_add_ref(dn, FTAG);
- dn = list_next(&osi->os_dnodes, dn))
+ dn = list_next(&os->os_dnodes, dn))
continue;
while (dn) {
dnode_t *next_dn = dn;
do {
- next_dn = list_next(&osi->os_dnodes, next_dn);
+ next_dn = list_next(&os->os_dnodes, next_dn);
} while (next_dn && !dnode_add_ref(next_dn, FTAG));
- mutex_exit(&osi->os_lock);
+ mutex_exit(&os->os_lock);
dnode_evict_dbufs(dn);
dnode_rele(dn, FTAG);
- mutex_enter(&osi->os_lock);
+ mutex_enter(&os->os_lock);
dn = next_dn;
}
- mutex_exit(&osi->os_lock);
- return (list_head(&osi->os_dnodes) != osi->os_meta_dnode);
+ dn = list_head(&os->os_dnodes);
+ mutex_exit(&os->os_lock);
+ return (dn != DMU_META_DNODE(os));
}
void
-dmu_objset_evict(dsl_dataset_t *ds, void *arg)
+dmu_objset_evict(objset_t *os)
{
- objset_impl_t *osi = arg;
- objset_t os;
- int i;
+ dsl_dataset_t *ds = os->os_dsl_dataset;
+ int t;
- for (i = 0; i < TXG_SIZE; i++) {
- ASSERT(list_head(&osi->os_dirty_dnodes[i]) == NULL);
- ASSERT(list_head(&osi->os_free_dnodes[i]) == NULL);
- }
+ for (t = 0; t < TXG_SIZE; t++)
+ ASSERT(!dmu_objset_is_dirty(os, t));
if (ds) {
if (!dsl_dataset_is_snapshot(ds)) {
VERIFY(0 == dsl_prop_unregister(ds, "checksum",
- checksum_changed_cb, osi));
+ checksum_changed_cb, os));
VERIFY(0 == dsl_prop_unregister(ds, "compression",
- compression_changed_cb, osi));
+ compression_changed_cb, os));
VERIFY(0 == dsl_prop_unregister(ds, "copies",
- copies_changed_cb, osi));
+ copies_changed_cb, os));
+ VERIFY(0 == dsl_prop_unregister(ds, "dedup",
+ dedup_changed_cb, os));
+ VERIFY(0 == dsl_prop_unregister(ds, "logbias",
+ logbias_changed_cb, os));
+ VERIFY(0 == dsl_prop_unregister(ds, "sync",
+ sync_changed_cb, os));
}
VERIFY(0 == dsl_prop_unregister(ds, "primarycache",
- primary_cache_changed_cb, osi));
+ primary_cache_changed_cb, os));
VERIFY(0 == dsl_prop_unregister(ds, "secondarycache",
- secondary_cache_changed_cb, osi));
+ secondary_cache_changed_cb, os));
}
+ if (os->os_sa)
+ sa_tear_down(os);
+
/*
* We should need only a single pass over the dnode list, since
* nothing can be added to the list at this point.
*/
- os.os = osi;
- (void) dmu_objset_evict_dbufs(&os);
+ (void) dmu_objset_evict_dbufs(os);
- dnode_special_close(osi->os_meta_dnode);
- if (osi->os_userused_dnode) {
- dnode_special_close(osi->os_userused_dnode);
- dnode_special_close(osi->os_groupused_dnode);
+ dnode_special_close(&os->os_meta_dnode);
+ if (DMU_USERUSED_DNODE(os)) {
+ dnode_special_close(&os->os_userused_dnode);
+ dnode_special_close(&os->os_groupused_dnode);
}
- zil_free(osi->os_zil);
+ zil_free(os->os_zil);
- ASSERT3P(list_head(&osi->os_dnodes), ==, NULL);
+ ASSERT3P(list_head(&os->os_dnodes), ==, NULL);
- VERIFY(arc_buf_remove_ref(osi->os_phys_buf, &osi->os_phys_buf) == 1);
- mutex_destroy(&osi->os_lock);
- mutex_destroy(&osi->os_obj_lock);
- mutex_destroy(&osi->os_user_ptr_lock);
- kmem_free(osi, sizeof (objset_impl_t));
+ VERIFY(arc_buf_remove_ref(os->os_phys_buf, &os->os_phys_buf) == 1);
+
+ /*
+ * This is a barrier to prevent the objset from going away in
+ * dnode_move() until we can safely ensure that the objset is still in
+ * use. We consider the objset valid before the barrier and invalid
+ * after the barrier.
+ */
+ rw_enter(&os_lock, RW_READER);
+ rw_exit(&os_lock);
+
+ mutex_destroy(&os->os_lock);
+ mutex_destroy(&os->os_obj_lock);
+ mutex_destroy(&os->os_user_ptr_lock);
+ kmem_free(os, sizeof (objset_t));
+}
+
+timestruc_t
+dmu_objset_snap_cmtime(objset_t *os)
+{
+ return (dsl_dir_snap_cmtime(os->os_dsl_dataset->ds_dir));
}
/* called from dsl for meta-objset */
-objset_impl_t *
+objset_t *
dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
dmu_objset_type_t type, dmu_tx_t *tx)
{
- objset_impl_t *osi;
+ objset_t *os;
dnode_t *mdn;
ASSERT(dmu_tx_is_syncing(tx));
- if (ds)
- mutex_enter(&ds->ds_opening_lock);
- VERIFY(0 == dmu_objset_open_impl(spa, ds, bp, &osi));
- if (ds)
- mutex_exit(&ds->ds_opening_lock);
- mdn = osi->os_meta_dnode;
+ if (ds != NULL)
+ VERIFY(0 == dmu_objset_from_ds(ds, &os));
+ else
+ VERIFY(0 == dmu_objset_open_impl(spa, NULL, bp, &os));
+
+ mdn = DMU_META_DNODE(os);
dnode_allocate(mdn, DMU_OT_DNODE, 1 << DNODE_BLOCK_SHIFT,
DN_MAX_INDBLKSHIFT, DMU_OT_NONE, 0, tx);
ASSERT(type != DMU_OST_NONE);
ASSERT(type != DMU_OST_ANY);
ASSERT(type < DMU_OST_NUMTYPES);
- osi->os_phys->os_type = type;
- if (dmu_objset_userused_enabled(osi)) {
- osi->os_phys->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
- osi->os_flags = osi->os_phys->os_flags;
+ os->os_phys->os_type = type;
+ if (dmu_objset_userused_enabled(os)) {
+ os->os_phys->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
+ os->os_flags = os->os_phys->os_flags;
}
dsl_dataset_dirty(ds, tx);
- return (osi);
+ return (os);
}
struct oscarg {
void (*userfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
void *userarg;
- dsl_dataset_t *clone_parent;
+ dsl_dataset_t *clone_origin;
const char *lastname;
dmu_objset_type_t type;
uint64_t flags;
+ cred_t *cr;
};
/*ARGSUSED*/
if (err != ENOENT)
return (err ? err : EEXIST);
- if (oa->clone_parent != NULL) {
- /*
- * You can't clone across pools.
- */
- if (oa->clone_parent->ds_dir->dd_pool != dd->dd_pool)
+ if (oa->clone_origin != NULL) {
+ /* You can't clone across pools. */
+ if (oa->clone_origin->ds_dir->dd_pool != dd->dd_pool)
return (EXDEV);
- /*
- * You can only clone snapshots, not the head datasets.
- */
- if (oa->clone_parent->ds_phys->ds_num_children == 0)
+ /* You can only clone snapshots, not the head datasets. */
+ if (!dsl_dataset_is_snapshot(oa->clone_origin))
return (EINVAL);
}
}
static void
-dmu_objset_create_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx)
+dmu_objset_create_sync(void *arg1, void *arg2, dmu_tx_t *tx)
{
dsl_dir_t *dd = arg1;
+ spa_t *spa = dd->dd_pool->dp_spa;
struct oscarg *oa = arg2;
- dsl_dataset_t *ds;
- blkptr_t *bp;
- uint64_t dsobj;
+ uint64_t obj;
ASSERT(dmu_tx_is_syncing(tx));
- dsobj = dsl_dataset_create_sync(dd, oa->lastname,
- oa->clone_parent, oa->flags, cr, tx);
+ obj = dsl_dataset_create_sync(dd, oa->lastname,
+ oa->clone_origin, oa->flags, oa->cr, tx);
+
+ if (oa->clone_origin == NULL) {
+ dsl_pool_t *dp = dd->dd_pool;
+ dsl_dataset_t *ds;
+ blkptr_t *bp;
+ objset_t *os;
- VERIFY(0 == dsl_dataset_hold_obj(dd->dd_pool, dsobj, FTAG, &ds));
- bp = dsl_dataset_get_blkptr(ds);
- if (BP_IS_HOLE(bp)) {
- objset_impl_t *osi;
+ VERIFY3U(0, ==, dsl_dataset_hold_obj(dp, obj, FTAG, &ds));
+ bp = dsl_dataset_get_blkptr(ds);
+ ASSERT(BP_IS_HOLE(bp));
- /* This is an empty dmu_objset; not a clone. */
- osi = dmu_objset_create_impl(dsl_dataset_get_spa(ds),
- ds, bp, oa->type, tx);
+ os = dmu_objset_create_impl(spa, ds, bp, oa->type, tx);
if (oa->userfunc)
- oa->userfunc(&osi->os, oa->userarg, cr, tx);
+ oa->userfunc(os, oa->userarg, oa->cr, tx);
+ dsl_dataset_rele(ds, FTAG);
}
- spa_history_internal_log(LOG_DS_CREATE, dd->dd_pool->dp_spa,
- tx, cr, "dataset = %llu", dsobj);
-
- dsl_dataset_rele(ds, FTAG);
+ spa_history_log_internal(LOG_DS_CREATE, spa, tx, "dataset = %llu", obj);
}
int
-dmu_objset_create(const char *name, dmu_objset_type_t type,
- objset_t *clone_parent, uint64_t flags,
+dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags,
void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg)
{
dsl_dir_t *pdd;
return (EEXIST);
}
- dprintf("name=%s\n", name);
-
oa.userfunc = func;
oa.userarg = arg;
oa.lastname = tail;
oa.type = type;
oa.flags = flags;
+ oa.cr = CRED();
- if (clone_parent != NULL) {
- /*
- * You can't clone to a different type.
- */
- if (clone_parent->os->os_phys->os_type != type) {
- dsl_dir_close(pdd, FTAG);
- return (EINVAL);
- }
- oa.clone_parent = clone_parent->os->os_dsl_dataset;
- }
err = dsl_sync_task_do(pdd->dd_pool, dmu_objset_create_check,
dmu_objset_create_sync, pdd, &oa, 5);
dsl_dir_close(pdd, FTAG);
}
int
-dmu_objset_destroy(const char *name, boolean_t defer)
+dmu_objset_clone(const char *name, dsl_dataset_t *clone_origin, uint64_t flags)
{
- objset_t *os;
- int error;
-
- /*
- * If it looks like we'll be able to destroy it, and there's
- * an unplayed replay log sitting around, destroy the log.
- * It would be nicer to do this in dsl_dataset_destroy_sync(),
- * but the replay log objset is modified in open context.
- */
- error = dmu_objset_open(name, DMU_OST_ANY,
- DS_MODE_OWNER|DS_MODE_READONLY|DS_MODE_INCONSISTENT, &os);
- if (error == 0) {
- dsl_dataset_t *ds = os->os->os_dsl_dataset;
- zil_destroy(dmu_objset_zil(os), B_FALSE);
+ dsl_dir_t *pdd;
+ const char *tail;
+ int err = 0;
+ struct oscarg oa = { 0 };
- error = dsl_dataset_destroy(ds, os, defer);
- /*
- * dsl_dataset_destroy() closes the ds.
- */
- kmem_free(os, sizeof (objset_t));
+ ASSERT(strchr(name, '@') == NULL);
+ err = dsl_dir_open(name, FTAG, &pdd, &tail);
+ if (err)
+ return (err);
+ if (tail == NULL) {
+ dsl_dir_close(pdd, FTAG);
+ return (EEXIST);
}
- return (error);
+ oa.lastname = tail;
+ oa.clone_origin = clone_origin;
+ oa.flags = flags;
+ oa.cr = CRED();
+
+ err = dsl_sync_task_do(pdd->dd_pool, dmu_objset_create_check,
+ dmu_objset_create_sync, pdd, &oa, 5);
+ dsl_dir_close(pdd, FTAG);
+ return (err);
}
-/*
- * This will close the objset.
- */
int
-dmu_objset_rollback(objset_t *os)
+dmu_objset_destroy(const char *name, boolean_t defer)
{
- int err;
dsl_dataset_t *ds;
+ int error;
- ds = os->os->os_dsl_dataset;
-
- if (!dsl_dataset_tryown(ds, TRUE, os)) {
- dmu_objset_close(os);
- return (EBUSY);
+ error = dsl_dataset_own(name, B_TRUE, FTAG, &ds);
+ if (error == 0) {
+ error = dsl_dataset_destroy(ds, FTAG, defer);
+ /* dsl_dataset_destroy() closes the ds. */
}
- err = dsl_dataset_rollback(ds, os->os->os_phys->os_type);
-
- /*
- * NB: we close the objset manually because the rollback
- * actually implicitly called dmu_objset_evict(), thus freeing
- * the objset_impl_t.
- */
- dsl_dataset_disown(ds, os);
- kmem_free(os, sizeof (objset_t));
- return (err);
+ return (error);
}
struct snaparg {
dsl_sync_task_group_t *dstg;
char *snapname;
+ char *htag;
char failed[MAXPATHLEN];
- boolean_t checkperms;
+ boolean_t recursive;
+ boolean_t needsuspend;
+ boolean_t temporary;
nvlist_t *props;
+ struct dsl_ds_holdarg *ha; /* only needed in the temporary case */
+ dsl_dataset_t *newds;
};
static int
{
objset_t *os = arg1;
struct snaparg *sn = arg2;
+ int error;
/* The props have already been checked by zfs_check_userprops(). */
- return (dsl_dataset_snapshot_check(os->os->os_dsl_dataset,
- sn->snapname, tx));
+ error = dsl_dataset_snapshot_check(os->os_dsl_dataset,
+ sn->snapname, tx);
+ if (error)
+ return (error);
+
+ if (sn->temporary) {
+ /*
+ * Ideally we would just call
+ * dsl_dataset_user_hold_check() and
+ * dsl_dataset_destroy_check() here. However the
+ * dataset we want to hold and destroy is the snapshot
+ * that we just confirmed we can create, but it won't
+ * exist until after these checks are run. Do any
+ * checks we can here and if more checks are added to
+ * those routines in the future, similar checks may be
+ * necessary here.
+ */
+ if (spa_version(os->os_spa) < SPA_VERSION_USERREFS)
+ return (ENOTSUP);
+ /*
+ * Not checking number of tags because the tag will be
+ * unique, as it will be the only tag.
+ */
+ if (strlen(sn->htag) + MAX_TAG_PREFIX_LEN >= MAXNAMELEN)
+ return (E2BIG);
+
+ sn->ha = kmem_alloc(sizeof(struct dsl_ds_holdarg), KM_PUSHPAGE);
+ sn->ha->temphold = B_TRUE;
+ sn->ha->htag = sn->htag;
+ }
+ return (error);
}
static void
-snapshot_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx)
+snapshot_sync(void *arg1, void *arg2, dmu_tx_t *tx)
{
objset_t *os = arg1;
- dsl_dataset_t *ds = os->os->os_dsl_dataset;
+ dsl_dataset_t *ds = os->os_dsl_dataset;
struct snaparg *sn = arg2;
- dsl_dataset_snapshot_sync(ds, sn->snapname, cr, tx);
+ dsl_dataset_snapshot_sync(ds, sn->snapname, tx);
+
+ if (sn->props) {
+ dsl_props_arg_t pa;
+ pa.pa_props = sn->props;
+ pa.pa_source = ZPROP_SRC_LOCAL;
+ dsl_props_set_sync(ds->ds_prev, &pa, tx);
+ }
+
+ if (sn->temporary) {
+ struct dsl_ds_destroyarg da;
+
+ dsl_dataset_user_hold_sync(ds->ds_prev, sn->ha, tx);
+ kmem_free(sn->ha, sizeof (struct dsl_ds_holdarg));
+ sn->ha = NULL;
+ sn->newds = ds->ds_prev;
- if (sn->props)
- dsl_props_set_sync(ds->ds_prev, sn->props, cr, tx);
+ da.ds = ds->ds_prev;
+ da.defer = B_TRUE;
+ dsl_dataset_destroy_sync(&da, FTAG, tx);
+ }
}
static int
-dmu_objset_snapshot_one(char *name, void *arg)
+dmu_objset_snapshot_one(const char *name, void *arg)
{
struct snaparg *sn = arg;
objset_t *os;
int err;
+ char *cp;
+
+ /*
+ * If the objset starts with a '%', then ignore it unless it was
+ * explicitly named (ie, not recursive). These hidden datasets
+ * are always inconsistent, and by not opening them here, we can
+ * avoid a race with dsl_dir_destroy_check().
+ */
+ cp = strrchr(name, '/');
+ if (cp && cp[1] == '%' && sn->recursive)
+ return (0);
(void) strcpy(sn->failed, name);
/*
- * Check permissions only when requested. This only applies when
- * doing a recursive snapshot. The permission checks for the starting
- * dataset have already been performed in zfs_secpolicy_snapshot()
+ * Check permissions if we are doing a recursive snapshot. The
+ * permission checks for the starting dataset have already been
+ * performed in zfs_secpolicy_snapshot()
*/
- if (sn->checkperms == B_TRUE &&
- (err = zfs_secpolicy_snapshot_perms(name, CRED())))
+ if (sn->recursive && (err = zfs_secpolicy_snapshot_perms(name, CRED())))
return (err);
- err = dmu_objset_open(name, DMU_OST_ANY, DS_MODE_USER, &os);
+ err = dmu_objset_hold(name, sn, &os);
if (err != 0)
return (err);
- /* If the objset is in an inconsistent state, return busy */
- if (os->os->os_dsl_dataset->ds_phys->ds_flags & DS_FLAG_INCONSISTENT) {
- dmu_objset_close(os);
- return (EBUSY);
- }
-
/*
- * NB: we need to wait for all in-flight changes to get to disk,
- * so that we snapshot those changes. zil_suspend does this as
- * a side effect.
+ * If the objset is in an inconsistent state (eg, in the process
+ * of being destroyed), don't snapshot it. As with %hidden
+ * datasets, we return EBUSY if this name was explicitly
+ * requested (ie, not recursive), and otherwise ignore it.
*/
- err = zil_suspend(dmu_objset_zil(os));
- if (err == 0) {
- dsl_sync_task_create(sn->dstg, snapshot_check,
- snapshot_sync, os, sn, 3);
- } else {
- dmu_objset_close(os);
+ if (os->os_dsl_dataset->ds_phys->ds_flags & DS_FLAG_INCONSISTENT) {
+ dmu_objset_rele(os, sn);
+ return (sn->recursive ? 0 : EBUSY);
}
- return (err);
+ if (sn->needsuspend) {
+ err = zil_suspend(dmu_objset_zil(os));
+ if (err) {
+ dmu_objset_rele(os, sn);
+ return (err);
+ }
+ }
+ dsl_sync_task_create(sn->dstg, snapshot_check, snapshot_sync,
+ os, sn, 3);
+
+ return (0);
}
int
-dmu_objset_snapshot(char *fsname, char *snapname,
- nvlist_t *props, boolean_t recursive)
+dmu_objset_snapshot(char *fsname, char *snapname, char *tag,
+ nvlist_t *props, boolean_t recursive, boolean_t temporary, int cleanup_fd)
{
dsl_sync_task_t *dst;
- struct snaparg sn;
+ struct snaparg *sn;
spa_t *spa;
+ minor_t minor;
int err;
- (void) strcpy(sn.failed, fsname);
+ sn = kmem_alloc(sizeof (struct snaparg), KM_SLEEP);
+ (void) strcpy(sn->failed, fsname);
err = spa_open(fsname, &spa, FTAG);
- if (err)
+ if (err) {
+ kmem_free(sn, sizeof (struct snaparg));
return (err);
+ }
- sn.dstg = dsl_sync_task_group_create(spa_get_dsl(spa));
- sn.snapname = snapname;
- sn.props = props;
+ if (temporary) {
+ if (cleanup_fd < 0) {
+ spa_close(spa, FTAG);
+ return (EINVAL);
+ }
+ if ((err = zfs_onexit_fd_hold(cleanup_fd, &minor)) != 0) {
+ spa_close(spa, FTAG);
+ return (err);
+ }
+ }
+
+ sn->dstg = dsl_sync_task_group_create(spa_get_dsl(spa));
+ sn->snapname = snapname;
+ sn->htag = tag;
+ sn->props = props;
+ sn->recursive = recursive;
+ sn->needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP);
+ sn->temporary = temporary;
+ sn->ha = NULL;
+ sn->newds = NULL;
if (recursive) {
- sn.checkperms = B_TRUE;
err = dmu_objset_find(fsname,
- dmu_objset_snapshot_one, &sn, DS_FIND_CHILDREN);
+ dmu_objset_snapshot_one, sn, DS_FIND_CHILDREN);
} else {
- sn.checkperms = B_FALSE;
- err = dmu_objset_snapshot_one(fsname, &sn);
+ err = dmu_objset_snapshot_one(fsname, sn);
}
if (err == 0)
- err = dsl_sync_task_group_wait(sn.dstg);
+ err = dsl_sync_task_group_wait(sn->dstg);
- for (dst = list_head(&sn.dstg->dstg_tasks); dst;
- dst = list_next(&sn.dstg->dstg_tasks, dst)) {
+ for (dst = list_head(&sn->dstg->dstg_tasks); dst;
+ dst = list_next(&sn->dstg->dstg_tasks, dst)) {
objset_t *os = dst->dst_arg1;
- dsl_dataset_t *ds = os->os->os_dsl_dataset;
- if (dst->dst_err)
- dsl_dataset_name(ds, sn.failed);
- zil_resume(dmu_objset_zil(os));
- dmu_objset_close(os);
+ dsl_dataset_t *ds = os->os_dsl_dataset;
+ if (dst->dst_err) {
+ dsl_dataset_name(ds, sn->failed);
+ } else if (temporary) {
+ dsl_register_onexit_hold_cleanup(sn->newds, tag, minor);
+ }
+ if (sn->needsuspend)
+ zil_resume(dmu_objset_zil(os));
+ dmu_objset_rele(os, sn);
}
if (err)
- (void) strcpy(fsname, sn.failed);
- dsl_sync_task_group_destroy(sn.dstg);
+ (void) strcpy(fsname, sn->failed);
+ if (temporary)
+ zfs_onexit_fd_rele(cleanup_fd);
+ dsl_sync_task_group_destroy(sn->dstg);
spa_close(spa, FTAG);
+ kmem_free(sn, sizeof (struct snaparg));
return (err);
}
{
dnode_t *dn;
- while (dn = list_head(list)) {
+ while ((dn = list_head(list))) {
ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT);
ASSERT(dn->dn_dbuf->db_data_pending);
/*
/* ARGSUSED */
static void
-ready(zio_t *zio, arc_buf_t *abuf, void *arg)
+dmu_objset_write_ready(zio_t *zio, arc_buf_t *abuf, void *arg)
{
+ int i;
+
blkptr_t *bp = zio->io_bp;
- blkptr_t *bp_orig = &zio->io_bp_orig;
- objset_impl_t *os = arg;
+ objset_t *os = arg;
dnode_phys_t *dnp = &os->os_phys->os_meta_dnode;
ASSERT(bp == os->os_rootbp);
* dnode and user/group accounting objects).
*/
bp->blk_fill = 0;
- for (int i = 0; i < dnp->dn_nblkptr; i++)
+ for (i = 0; i < dnp->dn_nblkptr; i++)
bp->blk_fill += dnp->dn_blkptr[i].blk_fill;
+}
+
+/* ARGSUSED */
+static void
+dmu_objset_write_done(zio_t *zio, arc_buf_t *abuf, void *arg)
+{
+ blkptr_t *bp = zio->io_bp;
+ blkptr_t *bp_orig = &zio->io_bp_orig;
+ objset_t *os = arg;
if (zio->io_flags & ZIO_FLAG_IO_REWRITE) {
- ASSERT(DVA_EQUAL(BP_IDENTITY(bp), BP_IDENTITY(bp_orig)));
+ ASSERT(BP_EQUAL(bp, bp_orig));
} else {
- if (zio->io_bp_orig.blk_birth == os->os_synctx->tx_txg)
- (void) dsl_dataset_block_kill(os->os_dsl_dataset,
- &zio->io_bp_orig, zio, os->os_synctx);
- dsl_dataset_block_born(os->os_dsl_dataset, bp, os->os_synctx);
+ dsl_dataset_t *ds = os->os_dsl_dataset;
+ dmu_tx_t *tx = os->os_synctx;
+
+ (void) dsl_dataset_block_kill(ds, bp_orig, tx, B_TRUE);
+ dsl_dataset_block_born(ds, bp, tx);
}
}
/* called from dsl */
void
-dmu_objset_sync(objset_impl_t *os, zio_t *pio, dmu_tx_t *tx)
+dmu_objset_sync(objset_t *os, zio_t *pio, dmu_tx_t *tx)
{
int txgoff;
zbookmark_t zb;
- writeprops_t wp = { 0 };
+ zio_prop_t zp;
zio_t *zio;
list_t *list;
list_t *newlist = NULL;
/*
* Create the root block IO
*/
- zb.zb_objset = os->os_dsl_dataset ? os->os_dsl_dataset->ds_object : 0;
- zb.zb_object = 0;
- zb.zb_level = -1; /* for block ordering; it's level 0 on disk */
- zb.zb_blkid = 0;
-
- wp.wp_type = DMU_OT_OBJSET;
- wp.wp_level = 0; /* on-disk BP level; see above */
- wp.wp_copies = os->os_copies;
- wp.wp_oschecksum = os->os_checksum;
- wp.wp_oscompress = os->os_compress;
-
- if (BP_IS_OLDER(os->os_rootbp, tx->tx_txg)) {
- (void) dsl_dataset_block_kill(os->os_dsl_dataset,
- os->os_rootbp, pio, tx);
- }
-
+ SET_BOOKMARK(&zb, os->os_dsl_dataset ?
+ os->os_dsl_dataset->ds_object : DMU_META_OBJSET,
+ ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
arc_release(os->os_phys_buf, &os->os_phys_buf);
- zio = arc_write(pio, os->os_spa, &wp, DMU_OS_IS_L2CACHEABLE(os),
- tx->tx_txg, os->os_rootbp, os->os_phys_buf, ready, NULL, os,
- ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb);
+ dmu_write_policy(os, NULL, 0, 0, &zp);
+
+ zio = arc_write(pio, os->os_spa, tx->tx_txg,
+ os->os_rootbp, os->os_phys_buf, DMU_OS_IS_L2CACHEABLE(os),
+ DMU_OS_IS_L2COMPRESSIBLE(os), &zp, dmu_objset_write_ready,
+ dmu_objset_write_done, os, ZIO_PRIORITY_ASYNC_WRITE,
+ ZIO_FLAG_MUSTSUCCEED, &zb);
/*
* Sync special dnodes - the parent IO for the sync is the root block
*/
- os->os_meta_dnode->dn_zio = zio;
- dnode_sync(os->os_meta_dnode, tx);
+ DMU_META_DNODE(os)->dn_zio = zio;
+ dnode_sync(DMU_META_DNODE(os), tx);
os->os_phys->os_flags = os->os_flags;
- if (os->os_userused_dnode &&
- os->os_userused_dnode->dn_type != DMU_OT_NONE) {
- os->os_userused_dnode->dn_zio = zio;
- dnode_sync(os->os_userused_dnode, tx);
- os->os_groupused_dnode->dn_zio = zio;
- dnode_sync(os->os_groupused_dnode, tx);
+ if (DMU_USERUSED_DNODE(os) &&
+ DMU_USERUSED_DNODE(os)->dn_type != DMU_OT_NONE) {
+ DMU_USERUSED_DNODE(os)->dn_zio = zio;
+ dnode_sync(DMU_USERUSED_DNODE(os), tx);
+ DMU_GROUPUSED_DNODE(os)->dn_zio = zio;
+ dnode_sync(DMU_GROUPUSED_DNODE(os), tx);
}
txgoff = tx->tx_txg & TXG_MASK;
dmu_objset_sync_dnodes(&os->os_free_dnodes[txgoff], newlist, tx);
dmu_objset_sync_dnodes(&os->os_dirty_dnodes[txgoff], newlist, tx);
- list = &os->os_meta_dnode->dn_dirty_records[txgoff];
- while (dr = list_head(list)) {
+ list = &DMU_META_DNODE(os)->dn_dirty_records[txgoff];
+ while ((dr = list_head(list)) != NULL) {
ASSERT(dr->dr_dbuf->db_level == 0);
list_remove(list, dr);
if (dr->dr_zio)
zio_nowait(zio);
}
+boolean_t
+dmu_objset_is_dirty(objset_t *os, uint64_t txg)
+{
+ return (!list_is_empty(&os->os_dirty_dnodes[txg & TXG_MASK]) ||
+ !list_is_empty(&os->os_free_dnodes[txg & TXG_MASK]));
+}
+
static objset_used_cb_t *used_cbs[DMU_OST_NUMTYPES];
void
}
boolean_t
-dmu_objset_userused_enabled(objset_impl_t *os)
+dmu_objset_userused_enabled(objset_t *os)
{
return (spa_version(os->os_spa) >= SPA_VERSION_USERSPACE &&
- used_cbs[os->os_phys->os_type] &&
- os->os_userused_dnode);
+ used_cbs[os->os_phys->os_type] != NULL &&
+ DMU_USERUSED_DNODE(os) != NULL);
+}
+
+static void
+do_userquota_update(objset_t *os, uint64_t used, uint64_t flags,
+ uint64_t user, uint64_t group, boolean_t subtract, dmu_tx_t *tx)
+{
+ if ((flags & DNODE_FLAG_USERUSED_ACCOUNTED)) {
+ int64_t delta = DNODE_SIZE + used;
+ if (subtract)
+ delta = -delta;
+ VERIFY3U(0, ==, zap_increment_int(os, DMU_USERUSED_OBJECT,
+ user, delta, tx));
+ VERIFY3U(0, ==, zap_increment_int(os, DMU_GROUPUSED_OBJECT,
+ group, delta, tx));
+ }
}
void
-dmu_objset_do_userquota_callbacks(objset_impl_t *os, dmu_tx_t *tx)
+dmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx)
{
dnode_t *dn;
list_t *list = &os->os_synced_dnodes;
- static const char zerobuf[DN_MAX_BONUSLEN] = {0};
ASSERT(list_head(list) == NULL || dmu_objset_userused_enabled(os));
- while (dn = list_head(list)) {
- dmu_object_type_t bonustype;
-
+ while ((dn = list_head(list)) != NULL) {
+ int flags;
ASSERT(!DMU_OBJECT_IS_SPECIAL(dn->dn_object));
- ASSERT(dn->dn_oldphys);
ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE ||
dn->dn_phys->dn_flags &
DNODE_FLAG_USERUSED_ACCOUNTED);
/* Allocate the user/groupused objects if necessary. */
- if (os->os_userused_dnode->dn_type == DMU_OT_NONE) {
- VERIFY(0 == zap_create_claim(&os->os,
+ if (DMU_USERUSED_DNODE(os)->dn_type == DMU_OT_NONE) {
+ VERIFY(0 == zap_create_claim(os,
DMU_USERUSED_OBJECT,
DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
- VERIFY(0 == zap_create_claim(&os->os,
+ VERIFY(0 == zap_create_claim(os,
DMU_GROUPUSED_OBJECT,
DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
}
/*
- * If the object was not previously
- * accounted, pretend that it was free.
+ * We intentionally modify the zap object even if the
+ * net delta is zero. Otherwise
+ * the block of the zap obj could be shared between
+ * datasets but need to be different between them after
+ * a bprewrite.
*/
- if (!(dn->dn_oldphys->dn_flags &
- DNODE_FLAG_USERUSED_ACCOUNTED)) {
- bzero(dn->dn_oldphys, sizeof (dnode_phys_t));
- }
- /*
- * If the object was freed, use the previous bonustype.
- */
- bonustype = dn->dn_phys->dn_bonustype ?
- dn->dn_phys->dn_bonustype : dn->dn_oldphys->dn_bonustype;
- ASSERT(dn->dn_phys->dn_type != 0 ||
- (bcmp(DN_BONUS(dn->dn_phys), zerobuf,
- DN_MAX_BONUSLEN) == 0 &&
- DN_USED_BYTES(dn->dn_phys) == 0));
- ASSERT(dn->dn_oldphys->dn_type != 0 ||
- (bcmp(DN_BONUS(dn->dn_oldphys), zerobuf,
- DN_MAX_BONUSLEN) == 0 &&
- DN_USED_BYTES(dn->dn_oldphys) == 0));
- used_cbs[os->os_phys->os_type](&os->os, bonustype,
- DN_BONUS(dn->dn_oldphys), DN_BONUS(dn->dn_phys),
- DN_USED_BYTES(dn->dn_oldphys),
- DN_USED_BYTES(dn->dn_phys), tx);
+ flags = dn->dn_id_flags;
+ ASSERT(flags);
+ if (flags & DN_ID_OLD_EXIST) {
+ do_userquota_update(os, dn->dn_oldused, dn->dn_oldflags,
+ dn->dn_olduid, dn->dn_oldgid, B_TRUE, tx);
+ }
+ if (flags & DN_ID_NEW_EXIST) {
+ do_userquota_update(os, DN_USED_BYTES(dn->dn_phys),
+ dn->dn_phys->dn_flags, dn->dn_newuid,
+ dn->dn_newgid, B_FALSE, tx);
+ }
- /*
- * The mutex is needed here for interlock with dnode_allocate.
- */
mutex_enter(&dn->dn_mtx);
- zio_buf_free(dn->dn_oldphys, sizeof (dnode_phys_t));
- dn->dn_oldphys = NULL;
+ dn->dn_oldused = 0;
+ dn->dn_oldflags = 0;
+ if (dn->dn_id_flags & DN_ID_NEW_EXIST) {
+ dn->dn_olduid = dn->dn_newuid;
+ dn->dn_oldgid = dn->dn_newgid;
+ dn->dn_id_flags |= DN_ID_OLD_EXIST;
+ if (dn->dn_bonuslen == 0)
+ dn->dn_id_flags |= DN_ID_CHKED_SPILL;
+ else
+ dn->dn_id_flags |= DN_ID_CHKED_BONUS;
+ }
+ dn->dn_id_flags &= ~(DN_ID_NEW_EXIST);
mutex_exit(&dn->dn_mtx);
list_remove(list, dn);
}
}
+/*
+ * Returns a pointer to data to find uid/gid from
+ *
+ * If a dirty record for transaction group that is syncing can't
+ * be found then NULL is returned. In the NULL case it is assumed
+ * the uid/gid aren't changing.
+ */
+static void *
+dmu_objset_userquota_find_data(dmu_buf_impl_t *db, dmu_tx_t *tx)
+{
+ dbuf_dirty_record_t *dr, **drp;
+ void *data;
+
+ if (db->db_dirtycnt == 0)
+ return (db->db.db_data); /* Nothing is changing */
+
+ for (drp = &db->db_last_dirty; (dr = *drp) != NULL; drp = &dr->dr_next)
+ if (dr->dr_txg == tx->tx_txg)
+ break;
+
+ if (dr == NULL) {
+ data = NULL;
+ } else {
+ dnode_t *dn;
+
+ DB_DNODE_ENTER(dr->dr_dbuf);
+ dn = DB_DNODE(dr->dr_dbuf);
+
+ if (dn->dn_bonuslen == 0 &&
+ dr->dr_dbuf->db_blkid == DMU_SPILL_BLKID)
+ data = dr->dt.dl.dr_data->b_data;
+ else
+ data = dr->dt.dl.dr_data;
+
+ DB_DNODE_EXIT(dr->dr_dbuf);
+ }
+
+ return (data);
+}
+
+void
+dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx)
+{
+ objset_t *os = dn->dn_objset;
+ void *data = NULL;
+ dmu_buf_impl_t *db = NULL;
+ uint64_t *user = NULL, *group = NULL;
+ int flags = dn->dn_id_flags;
+ int error;
+ boolean_t have_spill = B_FALSE;
+
+ if (!dmu_objset_userused_enabled(dn->dn_objset))
+ return;
+
+ if (before && (flags & (DN_ID_CHKED_BONUS|DN_ID_OLD_EXIST|
+ DN_ID_CHKED_SPILL)))
+ return;
+
+ if (before && dn->dn_bonuslen != 0)
+ data = DN_BONUS(dn->dn_phys);
+ else if (!before && dn->dn_bonuslen != 0) {
+ if (dn->dn_bonus) {
+ db = dn->dn_bonus;
+ mutex_enter(&db->db_mtx);
+ data = dmu_objset_userquota_find_data(db, tx);
+ } else {
+ data = DN_BONUS(dn->dn_phys);
+ }
+ } else if (dn->dn_bonuslen == 0 && dn->dn_bonustype == DMU_OT_SA) {
+ int rf = 0;
+
+ if (RW_WRITE_HELD(&dn->dn_struct_rwlock))
+ rf |= DB_RF_HAVESTRUCT;
+ error = dmu_spill_hold_by_dnode(dn,
+ rf | DB_RF_MUST_SUCCEED,
+ FTAG, (dmu_buf_t **)&db);
+ ASSERT(error == 0);
+ mutex_enter(&db->db_mtx);
+ data = (before) ? db->db.db_data :
+ dmu_objset_userquota_find_data(db, tx);
+ have_spill = B_TRUE;
+ } else {
+ mutex_enter(&dn->dn_mtx);
+ dn->dn_id_flags |= DN_ID_CHKED_BONUS;
+ mutex_exit(&dn->dn_mtx);
+ return;
+ }
+
+ if (before) {
+ ASSERT(data);
+ user = &dn->dn_olduid;
+ group = &dn->dn_oldgid;
+ } else if (data) {
+ user = &dn->dn_newuid;
+ group = &dn->dn_newgid;
+ }
+
+ /*
+ * Must always call the callback in case the object
+ * type has changed and that type isn't an object type to track
+ */
+ error = used_cbs[os->os_phys->os_type](dn->dn_bonustype, data,
+ user, group);
+
+ /*
+ * Preserve existing uid/gid when the callback can't determine
+ * what the new uid/gid are and the callback returned EEXIST.
+ * The EEXIST error tells us to just use the existing uid/gid.
+ * If we don't know what the old values are then just assign
+ * them to 0, since that is a new file being created.
+ */
+ if (!before && data == NULL && error == EEXIST) {
+ if (flags & DN_ID_OLD_EXIST) {
+ dn->dn_newuid = dn->dn_olduid;
+ dn->dn_newgid = dn->dn_oldgid;
+ } else {
+ dn->dn_newuid = 0;
+ dn->dn_newgid = 0;
+ }
+ error = 0;
+ }
+
+ if (db)
+ mutex_exit(&db->db_mtx);
+
+ mutex_enter(&dn->dn_mtx);
+ if (error == 0 && before)
+ dn->dn_id_flags |= DN_ID_OLD_EXIST;
+ if (error == 0 && !before)
+ dn->dn_id_flags |= DN_ID_NEW_EXIST;
+
+ if (have_spill) {
+ dn->dn_id_flags |= DN_ID_CHKED_SPILL;
+ } else {
+ dn->dn_id_flags |= DN_ID_CHKED_BONUS;
+ }
+ mutex_exit(&dn->dn_mtx);
+ if (have_spill)
+ dmu_buf_rele((dmu_buf_t *)db, FTAG);
+}
+
boolean_t
dmu_objset_userspace_present(objset_t *os)
{
- return (os->os->os_phys->os_flags &
+ return (os->os_phys->os_flags &
OBJSET_FLAG_USERACCOUNTING_COMPLETE);
}
if (dmu_objset_userspace_present(os))
return (0);
- if (!dmu_objset_userused_enabled(os->os))
+ if (!dmu_objset_userused_enabled(os))
return (ENOTSUP);
if (dmu_objset_is_snapshot(os))
return (EINVAL);
dmu_tx_commit(tx);
}
- os->os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
+ os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
txg_wait_synced(dmu_objset_pool(os), 0);
return (0);
}
dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
uint64_t *usedobjsp, uint64_t *availobjsp)
{
- dsl_dataset_space(os->os->os_dsl_dataset, refdbytesp, availbytesp,
+ dsl_dataset_space(os->os_dsl_dataset, refdbytesp, availbytesp,
usedobjsp, availobjsp);
}
uint64_t
dmu_objset_fsid_guid(objset_t *os)
{
- return (dsl_dataset_fsid_guid(os->os->os_dsl_dataset));
+ return (dsl_dataset_fsid_guid(os->os_dsl_dataset));
}
void
dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat)
{
- stat->dds_type = os->os->os_phys->os_type;
- if (os->os->os_dsl_dataset)
- dsl_dataset_fast_stat(os->os->os_dsl_dataset, stat);
+ stat->dds_type = os->os_phys->os_type;
+ if (os->os_dsl_dataset)
+ dsl_dataset_fast_stat(os->os_dsl_dataset, stat);
}
void
dmu_objset_stats(objset_t *os, nvlist_t *nv)
{
- ASSERT(os->os->os_dsl_dataset ||
- os->os->os_phys->os_type == DMU_OST_META);
+ ASSERT(os->os_dsl_dataset ||
+ os->os_phys->os_type == DMU_OST_META);
- if (os->os->os_dsl_dataset != NULL)
- dsl_dataset_stats(os->os->os_dsl_dataset, nv);
+ if (os->os_dsl_dataset != NULL)
+ dsl_dataset_stats(os->os_dsl_dataset, nv);
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE,
- os->os->os_phys->os_type);
+ os->os_phys->os_type);
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERACCOUNTING,
dmu_objset_userspace_present(os));
}
int
dmu_objset_is_snapshot(objset_t *os)
{
- if (os->os->os_dsl_dataset != NULL)
- return (dsl_dataset_is_snapshot(os->os->os_dsl_dataset));
+ if (os->os_dsl_dataset != NULL)
+ return (dsl_dataset_is_snapshot(os->os_dsl_dataset));
else
return (B_FALSE);
}
dmu_snapshot_realname(objset_t *os, char *name, char *real, int maxlen,
boolean_t *conflict)
{
- dsl_dataset_t *ds = os->os->os_dsl_dataset;
+ dsl_dataset_t *ds = os->os_dsl_dataset;
uint64_t ignored;
if (ds->ds_phys->ds_snapnames_zapobj == 0)
dmu_snapshot_list_next(objset_t *os, int namelen, char *name,
uint64_t *idp, uint64_t *offp, boolean_t *case_conflict)
{
- dsl_dataset_t *ds = os->os->os_dsl_dataset;
+ dsl_dataset_t *ds = os->os_dsl_dataset;
zap_cursor_t cursor;
zap_attribute_t attr;
}
int
+dmu_snapshot_lookup(objset_t *os, const char *name, uint64_t *value)
+{
+ return dsl_dataset_snap_lookup(os->os_dsl_dataset, name, value);
+}
+
+int
dmu_dir_list_next(objset_t *os, int namelen, char *name,
uint64_t *idp, uint64_t *offp)
{
- dsl_dir_t *dd = os->os->os_dsl_dataset->ds_dir;
+ dsl_dir_t *dd = os->os_dsl_dataset->ds_dir;
zap_cursor_t cursor;
zap_attribute_t attr;
/* there is no next dir on a snapshot! */
- if (os->os->os_dsl_dataset->ds_object !=
+ if (os->os_dsl_dataset->ds_object !=
dd->dd_phys->dd_head_dataset_obj)
return (ENOENT);
}
struct findarg {
- int (*func)(char *, void *);
+ int (*func)(const char *, void *);
void *arg;
};
findfunc(spa_t *spa, uint64_t dsobj, const char *dsname, void *arg)
{
struct findarg *fa = arg;
- return (fa->func((char *)dsname, fa->arg));
+ return (fa->func(dsname, fa->arg));
}
/*
* Perhaps change all callers to use dmu_objset_find_spa()?
*/
int
-dmu_objset_find(char *name, int func(char *, void *), void *arg, int flags)
+dmu_objset_find(char *name, int func(const char *, void *), void *arg,
+ int flags)
{
struct findarg fa;
fa.func = func;
}
thisobj = dd->dd_phys->dd_head_dataset_obj;
- attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
+ attr = kmem_alloc(sizeof (zap_attribute_t), KM_PUSHPAGE);
dp = dd->dd_pool;
/*
ASSERT(attr->za_integer_length == sizeof (uint64_t));
ASSERT(attr->za_num_integers == 1);
- child = kmem_alloc(MAXPATHLEN, KM_SLEEP);
- (void) strcpy(child, name);
- (void) strcat(child, "/");
- (void) strcat(child, attr->za_name);
+ child = kmem_asprintf("%s/%s", name, attr->za_name);
err = dmu_objset_find_spa(spa, child, func, arg, flags);
- kmem_free(child, MAXPATHLEN);
+ strfree(child);
if (err)
break;
}
sizeof (uint64_t));
ASSERT(attr->za_num_integers == 1);
- child = kmem_alloc(MAXPATHLEN, KM_SLEEP);
- (void) strcpy(child, name);
- (void) strcat(child, "@");
- (void) strcat(child, attr->za_name);
+ child = kmem_asprintf("%s@%s",
+ name, attr->za_name);
err = func(spa, attr->za_first_integer,
child, arg);
- kmem_free(child, MAXPATHLEN);
+ strfree(child);
if (err)
break;
}
/* ARGSUSED */
int
-dmu_objset_prefetch(char *name, void *arg)
+dmu_objset_prefetch(const char *name, void *arg)
{
dsl_dataset_t *ds;
if (!BP_IS_HOLE(&ds->ds_phys->ds_bp)) {
mutex_enter(&ds->ds_opening_lock);
- if (!dsl_dataset_get_user_ptr(ds)) {
+ if (ds->ds_objset == NULL) {
uint32_t aflags = ARC_NOWAIT | ARC_PREFETCH;
zbookmark_t zb;
- zb.zb_objset = ds->ds_object;
- zb.zb_object = 0;
- zb.zb_level = -1;
- zb.zb_blkid = 0;
+ SET_BOOKMARK(&zb, ds->ds_object, ZB_ROOT_OBJECT,
+ ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
- (void) arc_read_nolock(NULL, dsl_dataset_get_spa(ds),
+ (void) arc_read(NULL, dsl_dataset_get_spa(ds),
&ds->ds_phys->ds_bp, NULL, NULL,
ZIO_PRIORITY_ASYNC_READ,
ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE,
void
dmu_objset_set_user(objset_t *os, void *user_ptr)
{
- ASSERT(MUTEX_HELD(&os->os->os_user_ptr_lock));
- os->os->os_user_ptr = user_ptr;
+ ASSERT(MUTEX_HELD(&os->os_user_ptr_lock));
+ os->os_user_ptr = user_ptr;
}
void *
dmu_objset_get_user(objset_t *os)
{
- ASSERT(MUTEX_HELD(&os->os->os_user_ptr_lock));
- return (os->os->os_user_ptr);
+ ASSERT(MUTEX_HELD(&os->os_user_ptr_lock));
+ return (os->os_user_ptr);
}
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(dmu_objset_zil);
+EXPORT_SYMBOL(dmu_objset_pool);
+EXPORT_SYMBOL(dmu_objset_ds);
+EXPORT_SYMBOL(dmu_objset_type);
+EXPORT_SYMBOL(dmu_objset_name);
+EXPORT_SYMBOL(dmu_objset_hold);
+EXPORT_SYMBOL(dmu_objset_own);
+EXPORT_SYMBOL(dmu_objset_rele);
+EXPORT_SYMBOL(dmu_objset_disown);
+EXPORT_SYMBOL(dmu_objset_from_ds);
+EXPORT_SYMBOL(dmu_objset_create);
+EXPORT_SYMBOL(dmu_objset_clone);
+EXPORT_SYMBOL(dmu_objset_destroy);
+EXPORT_SYMBOL(dmu_objset_snapshot);
+EXPORT_SYMBOL(dmu_objset_stats);
+EXPORT_SYMBOL(dmu_objset_fast_stat);
+EXPORT_SYMBOL(dmu_objset_spa);
+EXPORT_SYMBOL(dmu_objset_space);
+EXPORT_SYMBOL(dmu_objset_fsid_guid);
+EXPORT_SYMBOL(dmu_objset_find);
+EXPORT_SYMBOL(dmu_objset_find_spa);
+EXPORT_SYMBOL(dmu_objset_prefetch);
+EXPORT_SYMBOL(dmu_objset_byteswap);
+EXPORT_SYMBOL(dmu_objset_evict_dbufs);
+EXPORT_SYMBOL(dmu_objset_snap_cmtime);
+
+EXPORT_SYMBOL(dmu_objset_sync);
+EXPORT_SYMBOL(dmu_objset_is_dirty);
+EXPORT_SYMBOL(dmu_objset_create_impl);
+EXPORT_SYMBOL(dmu_objset_open_impl);
+EXPORT_SYMBOL(dmu_objset_evict);
+EXPORT_SYMBOL(dmu_objset_register_type);
+EXPORT_SYMBOL(dmu_objset_do_userquota_updates);
+EXPORT_SYMBOL(dmu_objset_userquota_get_ids);
+EXPORT_SYMBOL(dmu_objset_userused_enabled);
+EXPORT_SYMBOL(dmu_objset_userspace_upgrade);
+EXPORT_SYMBOL(dmu_objset_userspace_present);
+#endif
git://git.camperquake.de / zfs.git / blobdiff