Ejemplo n.º 1
0
static int
zcp_clones_iter(lua_State *state)
{
	int err;
	char clonename[ZFS_MAX_DATASET_NAME_LEN];
	uint64_t dsobj = lua_tonumber(state, lua_upvalueindex(1));
	uint64_t cursor = lua_tonumber(state, lua_upvalueindex(2));
	dsl_pool_t *dp = zcp_run_info(state)->zri_pool;
	dsl_dataset_t *ds, *clone;
	zap_attribute_t za;
	zap_cursor_t zc;

	err = dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds);
	if (err == ENOENT) {
		return (0);
	} else if (err != 0) {
		return (luaL_error(state,
		    "unexpected error %d from dsl_dataset_hold_obj(dsobj)",
		    err));
	}

	if (dsl_dataset_phys(ds)->ds_next_clones_obj == 0) {
		dsl_dataset_rele(ds, FTAG);
		return (0);
	}

	zap_cursor_init_serialized(&zc, dp->dp_meta_objset,
	    dsl_dataset_phys(ds)->ds_next_clones_obj, cursor);
	dsl_dataset_rele(ds, FTAG);

	err = zap_cursor_retrieve(&zc, &za);
	if (err != 0) {
		zap_cursor_fini(&zc);
		if (err != ENOENT) {
			return (luaL_error(state,
			    "unexpected error %d from zap_cursor_retrieve()",
			    err));
		}
		return (0);
	}
	zap_cursor_advance(&zc);
	cursor = zap_cursor_serialize(&zc);
	zap_cursor_fini(&zc);

	err = dsl_dataset_hold_obj(dp, za.za_first_integer, FTAG, &clone);
	if (err != 0) {
		return (luaL_error(state,
		    "unexpected error %d from "
		    "dsl_dataset_hold_obj(za_first_integer)", err));
	}

	dsl_dir_name(clone->ds_dir, clonename);
	dsl_dataset_rele(clone, FTAG);

	lua_pushnumber(state, cursor);
	lua_replace(state, lua_upvalueindex(2));

	(void) lua_pushstring(state, clonename);
	return (1);
}
Ejemplo n.º 2
0
static int
dsl_bookmark_create_check_impl(dsl_dataset_t *snapds, const char *bookmark_name,
    dmu_tx_t *tx)
{
	dsl_pool_t *dp = dmu_tx_pool(tx);
	dsl_dataset_t *bmark_fs;
	char *shortname;
	int error;
	zfs_bookmark_phys_t bmark_phys;

	if (!snapds->ds_is_snapshot)
		return (SET_ERROR(EINVAL));

	error = dsl_bookmark_hold_ds(dp, bookmark_name,
	    &bmark_fs, FTAG, &shortname);
	if (error != 0)
		return (error);

	if (!dsl_dataset_is_before(bmark_fs, snapds, 0)) {
		dsl_dataset_rele(bmark_fs, FTAG);
		return (SET_ERROR(EINVAL));
	}

	error = dsl_dataset_bmark_lookup(bmark_fs, shortname,
	    &bmark_phys);
	dsl_dataset_rele(bmark_fs, FTAG);
	if (error == 0)
		return (SET_ERROR(EEXIST));
	if (error == ESRCH)
		return (0);
	return (error);
}
Ejemplo n.º 3
0
static void
dmu_objset_clone_sync(void *arg, dmu_tx_t *tx)
{
	dmu_objset_clone_arg_t *doca = arg;
	dsl_pool_t *dp = dmu_tx_pool(tx);
	dsl_dir_t *pdd;
	const char *tail;
	dsl_dataset_t *origin, *ds;
	uint64_t obj;
	char namebuf[MAXNAMELEN];

	VERIFY0(dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail));
	VERIFY0(dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin));

	obj = dsl_dataset_create_sync(pdd, tail, origin, 0,
	    doca->doca_cred, tx);

	VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds));
	dsl_dataset_name(origin, namebuf);
	spa_history_log_internal_ds(ds, "clone", tx,
	    "origin=%s (%llu)", namebuf, origin->ds_object);
	dsl_dataset_rele(ds, FTAG);
	dsl_dataset_rele(origin, FTAG);
	dsl_dir_rele(pdd, FTAG);
}
Ejemplo n.º 4
0
static void
dsl_bookmark_create_sync(void *arg, dmu_tx_t *tx)
{
	dsl_bookmark_create_arg_t *dbca = arg;
	dsl_pool_t *dp = dmu_tx_pool(tx);
	objset_t *mos = dp->dp_meta_objset;
	nvpair_t *pair;

	ASSERT(spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_BOOKMARKS));

	for (pair = nvlist_next_nvpair(dbca->dbca_bmarks, NULL);
	    pair != NULL; pair = nvlist_next_nvpair(dbca->dbca_bmarks, pair)) {
		dsl_dataset_t *snapds, *bmark_fs;
		zfs_bookmark_phys_t bmark_phys;
		char *shortname;

		VERIFY0(dsl_dataset_hold(dp, fnvpair_value_string(pair),
		    FTAG, &snapds));
		VERIFY0(dsl_bookmark_hold_ds(dp, nvpair_name(pair),
		    &bmark_fs, FTAG, &shortname));
		if (bmark_fs->ds_bookmarks == 0) {
			bmark_fs->ds_bookmarks =
			    zap_create_norm(mos, U8_TEXTPREP_TOUPPER,
			    DMU_OTN_ZAP_METADATA, DMU_OT_NONE, 0, tx);
			spa_feature_incr(dp->dp_spa, SPA_FEATURE_BOOKMARKS, tx);

			dsl_dataset_zapify(bmark_fs, tx);
			VERIFY0(zap_add(mos, bmark_fs->ds_object,
			    DS_FIELD_BOOKMARK_NAMES,
			    sizeof (bmark_fs->ds_bookmarks), 1,
			    &bmark_fs->ds_bookmarks, tx));
		}

		bmark_phys.zbm_guid = dsl_dataset_phys(snapds)->ds_guid;
		bmark_phys.zbm_creation_txg =
		    dsl_dataset_phys(snapds)->ds_creation_txg;
		bmark_phys.zbm_creation_time =
		    dsl_dataset_phys(snapds)->ds_creation_time;

		VERIFY0(zap_add(mos, bmark_fs->ds_bookmarks,
		    shortname, sizeof (uint64_t),
		    sizeof (zfs_bookmark_phys_t) / sizeof (uint64_t),
		    &bmark_phys, tx));

		spa_history_log_internal_ds(bmark_fs, "bookmark", tx,
		    "name=%s creation_txg=%llu target_snap=%llu",
		    shortname,
		    (longlong_t)bmark_phys.zbm_creation_txg,
		    (longlong_t)snapds->ds_object);

		dsl_dataset_rele(bmark_fs, FTAG);
		dsl_dataset_rele(snapds, FTAG);
	}
}
Ejemplo n.º 5
0
/*ARGSUSED*/
static int
dmu_objset_clone_check(void *arg, dmu_tx_t *tx)
{
	dmu_objset_clone_arg_t *doca = arg;
	dsl_dir_t *pdd;
	const char *tail;
	int error;
	dsl_dataset_t *origin;
	dsl_pool_t *dp = dmu_tx_pool(tx);

	if (strchr(doca->doca_clone, '@') != NULL)
		return (SET_ERROR(EINVAL));

	error = dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail);
	if (error != 0)
		return (error);
	if (tail == NULL) {
		dsl_dir_rele(pdd, FTAG);
		return (SET_ERROR(EEXIST));
	}
	/* You can't clone across pools. */
	if (pdd->dd_pool != dp) {
		dsl_dir_rele(pdd, FTAG);
		return (SET_ERROR(EXDEV));
	}
	error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL,
	    doca->doca_cred);
	if (error != 0) {
		dsl_dir_rele(pdd, FTAG);
		return (SET_ERROR(EDQUOT));
	}
	dsl_dir_rele(pdd, FTAG);

	error = dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin);
	if (error != 0)
		return (error);

	/* You can't clone across pools. */
	if (origin->ds_dir->dd_pool != dp) {
		dsl_dataset_rele(origin, FTAG);
		return (SET_ERROR(EXDEV));
	}

	/* You can only clone snapshots, not the head datasets. */
	if (!dsl_dataset_is_snapshot(origin)) {
		dsl_dataset_rele(origin, FTAG);
		return (SET_ERROR(EINVAL));
	}
	dsl_dataset_rele(origin, FTAG);

	return (0);
}
Ejemplo n.º 6
0
static void
dsl_dataset_user_hold_sync(void *arg, dmu_tx_t *tx)
{
	dsl_dataset_user_hold_arg_t *dduha = arg;
	dsl_pool_t *dp = dmu_tx_pool(tx);
	nvlist_t *tmpholds;
	nvpair_t *pair;
	uint64_t now = gethrestime_sec();

	if (dduha->dduha_minor != 0)
		tmpholds = fnvlist_alloc();
	else
		tmpholds = NULL;
	for (pair = nvlist_next_nvpair(dduha->dduha_chkholds, NULL);
	    pair != NULL;
	    pair = nvlist_next_nvpair(dduha->dduha_chkholds, pair)) {
		dsl_dataset_t *ds;

		VERIFY0(dsl_dataset_hold(dp, nvpair_name(pair), FTAG, &ds));
		dsl_dataset_user_hold_sync_one_impl(tmpholds, ds,
		    fnvpair_value_string(pair), dduha->dduha_minor, now, tx);
		dsl_dataset_rele(ds, FTAG);
	}
	dsl_onexit_hold_cleanup(dp->dp_spa, tmpholds, dduha->dduha_minor);
}
Ejemplo n.º 7
0
static int
zcp_exists(lua_State *state)
{
	zcp_run_info_t *ri = zcp_run_info(state);
	dsl_pool_t *dp = ri->zri_pool;
	zcp_lib_info_t *libinfo = &zcp_exists_info;

	zcp_parse_args(state, libinfo->name, libinfo->pargs, libinfo->kwargs);

	const char *dsname = lua_tostring(state, 1);

	dsl_dataset_t *ds;
	int error = dsl_dataset_hold(dp, dsname, FTAG, &ds);
	if (error == 0) {
		dsl_dataset_rele(ds, FTAG);
		lua_pushboolean(state, B_TRUE);
	} else if (error == ENOENT) {
		lua_pushboolean(state, B_FALSE);
	} else if (error == EXDEV) {
		return (luaL_error(state, "dataset '%s' is not in the "
		    "target pool", dsname));
	} else if (error == EIO) {
		return (luaL_error(state, "I/O error opening dataset '%s'",
		    dsname));
	} else if (error != 0) {
		return (luaL_error(state, "unexpected error %d", error));
	}

	return (1);
}
Ejemplo n.º 8
0
int
dsl_destroy_snapshot_check(void *arg, dmu_tx_t *tx)
{
	dsl_destroy_snapshot_arg_t *ddsa = arg;
	const char *dsname = ddsa->ddsa_name;
	boolean_t defer = ddsa->ddsa_defer;

	dsl_pool_t *dp = dmu_tx_pool(tx);
	int error = 0;
	dsl_dataset_t *ds;

	error = dsl_dataset_hold(dp, dsname, FTAG, &ds);

	/*
	 * If the snapshot does not exist, silently ignore it, and
	 * dsl_destroy_snapshot_sync() will be a no-op
	 * (it's "already destroyed").
	 */
	if (error == ENOENT)
		return (0);

	if (error == 0) {
		error = dsl_destroy_snapshot_check_impl(ds, defer);
		dsl_dataset_rele(ds, FTAG);
	}

	return (error);
}
Ejemplo n.º 9
0
void
dsl_dir_stats(dsl_dir_t *dd, nvlist_t *nv)
{
	mutex_enter(&dd->dd_lock);
	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, dd->dd_used_bytes);
	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_QUOTA, dd->dd_phys->dd_quota);
	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_RESERVATION,
	    dd->dd_phys->dd_reserved);
	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO,
	    dd->dd_phys->dd_compressed_bytes == 0 ? 100 :
	    (dd->dd_phys->dd_uncompressed_bytes * 100 /
	    dd->dd_phys->dd_compressed_bytes));
	mutex_exit(&dd->dd_lock);

	rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER);
	if (dsl_dir_is_clone(dd)) {
		dsl_dataset_t *ds;
		char buf[MAXNAMELEN];

		VERIFY(0 == dsl_dataset_hold_obj(dd->dd_pool,
		    dd->dd_phys->dd_origin_obj, FTAG, &ds));
		dsl_dataset_name(ds, buf);
		dsl_dataset_rele(ds, FTAG);
		dsl_prop_nvlist_add_string(nv, ZFS_PROP_ORIGIN, buf);
	}
	rw_exit(&dd->dd_pool->dp_config_rwlock);
}
Ejemplo n.º 10
0
int
dsl_pool_open(spa_t *spa, uint64_t txg, dsl_pool_t **dpp)
{
	int err;
	dsl_pool_t *dp = dsl_pool_open_impl(spa, txg);
	dsl_dir_t *dd;
	dsl_dataset_t *ds;
	uint64_t obj;

	rw_enter(&dp->dp_config_rwlock, RW_WRITER);
	err = dmu_objset_open_impl(spa, NULL, &dp->dp_meta_rootbp,
	    &dp->dp_meta_objset);
	if (err)
		goto out;

	err = zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
	    DMU_POOL_ROOT_DATASET, sizeof (uint64_t), 1,
	    &dp->dp_root_dir_obj);
	if (err)
		goto out;

	err = dsl_dir_open_obj(dp, dp->dp_root_dir_obj,
	    NULL, dp, &dp->dp_root_dir);
	if (err)
		goto out;

	err = dsl_pool_open_special_dir(dp, MOS_DIR_NAME, &dp->dp_mos_dir);
	if (err)
		goto out;

	if (spa_version(spa) >= SPA_VERSION_ORIGIN) {
		err = dsl_pool_open_special_dir(dp, ORIGIN_DIR_NAME, &dd);
		if (err)
			goto out;
		err = dsl_dataset_hold_obj(dp, dd->dd_phys->dd_head_dataset_obj,
		    FTAG, &ds);
		if (err == 0) {
			err = dsl_dataset_hold_obj(dp,
			    ds->ds_phys->ds_prev_snap_obj, dp,
			    &dp->dp_origin_snap);
			dsl_dataset_rele(ds, FTAG);
		}
		dsl_dir_close(dd, dp);
		if (err)
			goto out;
	}

	if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
		err = dsl_pool_open_special_dir(dp, FREE_DIR_NAME,
		    &dp->dp_free_dir);
		if (err)
			goto out;

		err = zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
		    DMU_POOL_FREE_BPOBJ, sizeof (uint64_t), 1, &obj);
		if (err)
			goto out;
		VERIFY3U(0, ==, bpobj_open(&dp->dp_free_bpobj,
		    dp->dp_meta_objset, obj));
	}
Ejemplo n.º 11
0
static void
dmu_objset_create_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx)
{
	dsl_dir_t *dd = arg1;
	struct oscarg *oa = arg2;
	dsl_dataset_t *ds;
	blkptr_t *bp;
	uint64_t dsobj;

	ASSERT(dmu_tx_is_syncing(tx));

	dsobj = dsl_dataset_create_sync(dd, oa->lastname,
	    oa->clone_parent, oa->flags, cr, tx);

	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;

		/* This is an empty dmu_objset; not a clone. */
		osi = dmu_objset_create_impl(dsl_dataset_get_spa(ds),
		    ds, bp, oa->type, tx);

		if (oa->userfunc)
			oa->userfunc(&osi->os, oa->userarg, cr, tx);
	}

	spa_history_internal_log(LOG_DS_CREATE, dd->dd_pool->dp_spa,
	    tx, cr, "dataset = %llu", dsobj);

	dsl_dataset_rele(ds, FTAG);
}
Ejemplo n.º 12
0
/*
 * Get a list of all visble properties and their values for a given dataset.
 * Returned on the stack as a Lua table.
 */
static int
zcp_system_props_list(lua_State *state)
{
	int error;
	char errbuf[128];
	const char *dataset_name;
	dsl_pool_t *dp = zcp_run_info(state)->zri_pool;
	zcp_list_info_t *libinfo = &zcp_system_props_list_info;
	zcp_parse_args(state, libinfo->name, libinfo->pargs, libinfo->kwargs);
	dataset_name = lua_tostring(state, 1);
	nvlist_t *nv = fnvlist_alloc();

	dsl_dataset_t *ds = zcp_dataset_hold(state, dp, dataset_name, FTAG);
	if (ds == NULL)
		return (1); /* not reached; zcp_dataset_hold() longjmp'd */

	/* Get the names of all valid properties for this dataset */
	zcp_dataset_props(ds, nv);
	dsl_dataset_rele(ds, FTAG);

	/* push list as lua table */
	error = zcp_nvlist_to_lua(state, nv, errbuf, sizeof (errbuf));
	nvlist_free(nv);
	if (error != 0) {
		return (luaL_error(state,
		    "Error returning nvlist: %s", errbuf));
	}
	return (1);
}
Ejemplo n.º 13
0
static int
zcp_props_list(lua_State *state)
{
	const char *dsname = lua_tostring(state, 1);
	dsl_pool_t *dp = zcp_run_info(state)->zri_pool;
	objset_t *os;
	nvlist_t **props = lua_newuserdata(state, sizeof (nvlist_t *));

	dsl_dataset_t *ds = zcp_dataset_hold(state, dp, dsname, FTAG);
	if (ds == NULL)
		return (1); /* not reached; zcp_dataset_hold() longjmp'd */
	VERIFY0(dmu_objset_from_ds(ds, &os));
	VERIFY0(dsl_prop_get_all(os, props));
	dsl_dataset_rele(ds, FTAG);

	/*
	 * Set the metatable for the properties list to free it on completion.
	 */
	luaL_getmetatable(state, zcp_props_list_info.name);
	(void) lua_setmetatable(state, -2);

	lua_pushlightuserdata(state, NULL);
	lua_pushcclosure(state, &zcp_props_iter, 2);
	return (1);
}
Ejemplo n.º 14
0
static int
zcp_children_list(lua_State *state)
{
	const char *fsname = lua_tostring(state, 1);
	dsl_pool_t *dp = zcp_run_info(state)->zri_pool;
	boolean_t issnap;
	uint64_t dsobj;

	dsl_dataset_t *ds = zcp_dataset_hold(state, dp, fsname, FTAG);
	if (ds == NULL)
		return (1); /* not reached; zcp_dataset_hold() longjmp'd */

	issnap = ds->ds_is_snapshot;
	dsobj = ds->ds_object;
	dsl_dataset_rele(ds, FTAG);

	if (issnap) {
		return (zcp_argerror(state, 1,
		    "argument %s cannot be a snapshot", fsname));
	}

	lua_pushnumber(state, dsobj);
	lua_pushnumber(state, 0);
	lua_pushcclosure(state, &zcp_children_iter, 2);
	return (1);
}
Ejemplo n.º 15
0
static int
zcp_clones_list(lua_State *state)
{
	const char *snapname = lua_tostring(state, 1);
	dsl_pool_t *dp = zcp_run_info(state)->zri_pool;
	boolean_t issnap;
	uint64_t dsobj, cursor;

	/*
	 * zcp_dataset_hold will either successfully return the requested
	 * dataset or throw a lua error and longjmp out of the zfs.list.clones
	 * call without returning.
	 */
	dsl_dataset_t *ds = zcp_dataset_hold(state, dp, snapname, FTAG);
	if (ds == NULL)
		return (1); /* not reached; zcp_dataset_hold() longjmp'd */
	cursor = 0;
	issnap = ds->ds_is_snapshot;
	dsobj = ds->ds_object;
	dsl_dataset_rele(ds, FTAG);

	if (!issnap) {
		return (zcp_argerror(state, 1, "%s is not a snapshot",
		    snapname));
	}

	lua_pushnumber(state, dsobj);
	lua_pushnumber(state, cursor);
	lua_pushcclosure(state, &zcp_clones_iter, 2);
	return (1);
}
Ejemplo n.º 16
0
/* ARGSUSED */
int
dmu_objset_prefetch(char *name, void *arg)
{
	dsl_dataset_t *ds;

	if (dsl_dataset_hold(name, FTAG, &ds))
		return (0);

	if (!BP_IS_HOLE(&ds->ds_phys->ds_bp)) {
		mutex_enter(&ds->ds_opening_lock);
		if (!dsl_dataset_get_user_ptr(ds)) {
			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;

			(void) arc_read_nolock(NULL, dsl_dataset_get_spa(ds),
			    &ds->ds_phys->ds_bp, NULL, NULL,
			    ZIO_PRIORITY_ASYNC_READ,
			    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE,
			    &aflags, &zb);
		}
		mutex_exit(&ds->ds_opening_lock);
	}

	dsl_dataset_rele(ds, FTAG);
	return (0);
}
Ejemplo n.º 17
0
/* called from zpl */
int
dmu_objset_open(const char *name, dmu_objset_type_t type, int mode,
    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));
		return (err);
	}

	err = dmu_objset_open_ds_os(ds, os, type);
	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;
	}
	return (err);
}
Ejemplo n.º 18
0
int
dsl_dataset_get_holds(const char *dsname, nvlist_t *nvl)
{
	dsl_pool_t *dp;
	dsl_dataset_t *ds;
	int err;

	err = dsl_pool_hold(dsname, FTAG, &dp);
	if (err != 0)
		return (err);
	err = dsl_dataset_hold(dp, dsname, FTAG, &ds);
	if (err != 0) {
		dsl_pool_rele(dp, FTAG);
		return (err);
	}

	if (ds->ds_phys->ds_userrefs_obj != 0) {
		zap_attribute_t *za;
		zap_cursor_t zc;

		za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
		for (zap_cursor_init(&zc, ds->ds_dir->dd_pool->dp_meta_objset,
		    ds->ds_phys->ds_userrefs_obj);
		    zap_cursor_retrieve(&zc, za) == 0;
		    zap_cursor_advance(&zc)) {
			fnvlist_add_uint64(nvl, za->za_name,
			    za->za_first_integer);
		}
		zap_cursor_fini(&zc);
		kmem_free(za, sizeof (zap_attribute_t));
	}
	dsl_dataset_rele(ds, FTAG);
	dsl_pool_rele(dp, FTAG);
	return (0);
}
Ejemplo n.º 19
0
static void
dsl_dataset_remove_clones_key(dsl_dataset_t *ds, uint64_t mintxg, dmu_tx_t *tx)
{
	objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
	zap_cursor_t zc;
	zap_attribute_t za;

	/*
	 * If it is the old version, dd_clones doesn't exist so we can't
	 * find the clones, but dsl_deadlist_remove_key() is a no-op so it
	 * doesn't matter.
	 */
	if (dsl_dir_phys(ds->ds_dir)->dd_clones == 0)
		return;

	for (zap_cursor_init(&zc, mos, dsl_dir_phys(ds->ds_dir)->dd_clones);
	    zap_cursor_retrieve(&zc, &za) == 0;
	    zap_cursor_advance(&zc)) {
		dsl_dataset_t *clone;

		VERIFY0(dsl_dataset_hold_obj(ds->ds_dir->dd_pool,
		    za.za_first_integer, FTAG, &clone));
		if (clone->ds_dir->dd_origin_txg > mintxg) {
			dsl_deadlist_remove_key(&clone->ds_deadlist,
			    mintxg, tx);
			dsl_dataset_remove_clones_key(clone, mintxg, tx);
		}
		dsl_dataset_rele(clone, FTAG);
	}
	zap_cursor_fini(&zc);
}
Ejemplo n.º 20
0
/*
 * Called at spa_load time to release a stale temporary user hold.
 * Also called by the onexit code.
 */
void
dsl_dataset_user_release_tmp(dsl_pool_t *dp, uint64_t dsobj, const char *htag)
{
	dsl_dataset_user_release_tmp_arg_t ddurta;

#ifdef _KERNEL
	dsl_dataset_t *ds;
	int error;

	/* Make sure it is not mounted. */
	dsl_pool_config_enter(dp, FTAG);
	error = dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds);
	if (error == 0) {
		char name[MAXNAMELEN];
		dsl_dataset_name(ds, name);
		dsl_dataset_rele(ds, FTAG);
		dsl_pool_config_exit(dp, FTAG);
		zfs_unmount_snap(name);
	} else {
		dsl_pool_config_exit(dp, FTAG);
	}
#endif

	ddurta.ddurta_dsobj = dsobj;
	ddurta.ddurta_holds = fnvlist_alloc();
	fnvlist_add_boolean(ddurta.ddurta_holds, htag);

	(void) dsl_sync_task(spa_name(dp->dp_spa),
	    dsl_dataset_user_release_tmp_check,
	    dsl_dataset_user_release_tmp_sync, &ddurta, 1);
	fnvlist_free(ddurta.ddurta_holds);
}
Ejemplo n.º 21
0
static void
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;
	uint64_t obj;

	ASSERT(dmu_tx_is_syncing(tx));

	obj = dsl_dataset_create_sync(dd, oa->lastname,
        oa->clone_origin, oa->crypto_ctx, 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;

		VERIFY3U(0, ==, dsl_dataset_hold_obj(dp, obj, FTAG, &ds));
		bp = dsl_dataset_get_blkptr(ds);
		ASSERT(BP_IS_HOLE(bp));

		os = dmu_objset_create_impl(spa, ds, bp, oa->type,
                                    oa->crypto_ctx, tx);

		if (oa->userfunc)
			oa->userfunc(os, oa->userarg, oa->cr, tx);
		dsl_dataset_rele(ds, FTAG);
	}
Ejemplo n.º 22
0
static void
dsl_dataset_user_release_sync(void *arg, dmu_tx_t *tx)
{
	dsl_dataset_user_release_arg_t *ddura = arg;
	dsl_holdfunc_t *holdfunc = ddura->ddura_holdfunc;
	dsl_pool_t *dp = dmu_tx_pool(tx);

	ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock));

	for (nvpair_t *pair = nvlist_next_nvpair(ddura->ddura_chkholds, NULL);
	    pair != NULL; pair = nvlist_next_nvpair(ddura->ddura_chkholds,
	    pair)) {
		dsl_dataset_t *ds;
		const char *name = nvpair_name(pair);

		VERIFY0(holdfunc(dp, name, FTAG, &ds));

		dsl_dataset_user_release_sync_one(ds,
		    fnvpair_value_nvlist(pair), tx);
		if (nvlist_exists(ddura->ddura_todelete, name)) {
			ASSERT(ds->ds_userrefs == 0 &&
			    ds->ds_phys->ds_num_children == 1 &&
			    DS_IS_DEFER_DESTROY(ds));
			dsl_destroy_snapshot_sync_impl(ds, B_FALSE, tx);
		}
		dsl_dataset_rele(ds, FTAG);
	}
}
Ejemplo n.º 23
0
void
dmu_objset_rele(objset_t *os, void *tag)
{
	dsl_pool_t *dp = dmu_objset_pool(os);
	dsl_dataset_rele(os->os_dsl_dataset, tag);
	dsl_pool_rele(dp, tag);
}
Ejemplo n.º 24
0
static void
dmu_objset_create_sync(void *arg, dmu_tx_t *tx)
{
	dmu_objset_create_arg_t *doca = arg;
	dsl_pool_t *dp = dmu_tx_pool(tx);
	dsl_dir_t *pdd;
	const char *tail;
	dsl_dataset_t *ds;
	uint64_t obj;
	blkptr_t *bp;
	objset_t *os;

	VERIFY0(dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail));

	obj = dsl_dataset_create_sync(pdd, tail, NULL, doca->doca_flags,
	    doca->doca_cred, tx);

	VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds));
	bp = dsl_dataset_get_blkptr(ds);
	os = dmu_objset_create_impl(pdd->dd_pool->dp_spa,
	    ds, bp, doca->doca_type, tx);

	if (doca->doca_userfunc != NULL) {
		doca->doca_userfunc(os, doca->doca_userarg,
		    doca->doca_cred, tx);
	}

	spa_history_log_internal_ds(ds, "create", tx, "");
	dsl_dataset_rele(ds, FTAG);
	dsl_dir_rele(pdd, FTAG);
}
Ejemplo n.º 25
0
void
dsl_pool_close(dsl_pool_t *dp)
{
	/*
	 * Drop our references from dsl_pool_open().
	 *
	 * Since we held the origin_snap from "syncing" context (which
	 * includes pool-opening context), it actually only got a "ref"
	 * and not a hold, so just drop that here.
	 */
	if (dp->dp_origin_snap != NULL)
		dsl_dataset_rele(dp->dp_origin_snap, dp);
	if (dp->dp_mos_dir != NULL)
		dsl_dir_rele(dp->dp_mos_dir, dp);
	if (dp->dp_free_dir != NULL)
		dsl_dir_rele(dp->dp_free_dir, dp);
	if (dp->dp_leak_dir != NULL)
		dsl_dir_rele(dp->dp_leak_dir, dp);
	if (dp->dp_root_dir != NULL)
		dsl_dir_rele(dp->dp_root_dir, dp);

	bpobj_close(&dp->dp_free_bpobj);
	bpobj_close(&dp->dp_obsolete_bpobj);

	/* undo the dmu_objset_open_impl(mos) from dsl_pool_open() */
	if (dp->dp_meta_objset != NULL)
		dmu_objset_evict(dp->dp_meta_objset);

	txg_list_destroy(&dp->dp_dirty_datasets);
	txg_list_destroy(&dp->dp_dirty_zilogs);
	txg_list_destroy(&dp->dp_sync_tasks);
	txg_list_destroy(&dp->dp_early_sync_tasks);
	txg_list_destroy(&dp->dp_dirty_dirs);

	taskq_destroy(dp->dp_zil_clean_taskq);
	taskq_destroy(dp->dp_sync_taskq);

	/*
	 * We can't set retry to TRUE since we're explicitly specifying
	 * a spa to flush. This is good enough; any missed buffers for
	 * this spa won't cause trouble, and they'll eventually fall
	 * out of the ARC just like any other unused buffer.
	 */
	arc_flush(dp->dp_spa, FALSE);

	mmp_fini(dp->dp_spa);
	txg_fini(dp);
	dsl_scan_fini(dp);
	dmu_buf_user_evict_wait();

	rrw_destroy(&dp->dp_config_rwlock);
	mutex_destroy(&dp->dp_lock);
	cv_destroy(&dp->dp_spaceavail_cv);
	taskq_destroy(dp->dp_iput_taskq);
	if (dp->dp_blkstats != NULL) {
		mutex_destroy(&dp->dp_blkstats->zab_lock);
		vmem_free(dp->dp_blkstats, sizeof (zfs_all_blkstats_t));
	}
	kmem_free(dp, sizeof (dsl_pool_t));
}
Ejemplo n.º 26
0
static int
dsl_bookmark_create_check(void *arg, dmu_tx_t *tx)
{
	dsl_bookmark_create_arg_t *dbca = arg;
	dsl_pool_t *dp = dmu_tx_pool(tx);
	int rv = 0;

	if (!spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_BOOKMARKS))
		return (SET_ERROR(ENOTSUP));

	for (nvpair_t *pair = nvlist_next_nvpair(dbca->dbca_bmarks, NULL);
	    pair != NULL; pair = nvlist_next_nvpair(dbca->dbca_bmarks, pair)) {
		dsl_dataset_t *snapds;
		int error;

		/* note: validity of nvlist checked by ioctl layer */
		error = dsl_dataset_hold(dp, fnvpair_value_string(pair),
		    FTAG, &snapds);
		if (error == 0) {
			error = dsl_bookmark_create_check_impl(snapds,
			    nvpair_name(pair), tx);
			dsl_dataset_rele(snapds, FTAG);
		}
		if (error != 0) {
			fnvlist_add_int32(dbca->dbca_errors,
			    nvpair_name(pair), error);
			rv = error;
		}
	}

	return (rv);
}
Ejemplo n.º 27
0
/* ARGSUSED */
static int
dsl_prop_notify_all_cb(dsl_pool_t *dp, dsl_dataset_t *ds, void *arg)
{
	dsl_dir_t *dd = ds->ds_dir;
	dsl_prop_record_t *pr;
	dsl_prop_cb_record_t *cbr;

	mutex_enter(&dd->dd_lock);
	for (pr = list_head(&dd->dd_props);
	    pr; pr = list_next(&dd->dd_props, pr)) {
		for (cbr = list_head(&pr->pr_cbs); cbr;
		    cbr = list_next(&pr->pr_cbs, cbr)) {
			uint64_t value;

			/*
			 * Callback entries do not have holds on their
			 * datasets so that datasets with registered
			 * callbacks are still eligible for eviction.
			 * Unlike operations to update properties on a
			 * single dataset, we are performing a recursive
			 * descent of related head datasets.  The caller
			 * of this function only has a dataset hold on
			 * the passed in head dataset, not the snapshots
			 * associated with this dataset.  Without a hold,
			 * the dataset pointer within callback records
			 * for snapshots can be invalidated by eviction
			 * at any time.
			 *
			 * Use dsl_dataset_try_add_ref() to verify
			 * that the dataset for a snapshot has not
			 * begun eviction processing and to prevent
			 * eviction from occurring for the duration of
			 * the callback.  If the hold attempt fails,
			 * this object is already being evicted and the
			 * callback can be safely ignored.
			 */
			if (ds != cbr->cbr_ds &&
			    !dsl_dataset_try_add_ref(dp, cbr->cbr_ds, FTAG))
				continue;

			if (dsl_prop_get_ds(cbr->cbr_ds,
			    cbr->cbr_pr->pr_propname, sizeof (value), 1,
			    &value, NULL) == 0)
				cbr->cbr_func(cbr->cbr_arg, value);

			if (ds != cbr->cbr_ds)
				dsl_dataset_rele(cbr->cbr_ds, FTAG);
		}
	}
	mutex_exit(&dd->dd_lock);

	return (0);
}
Ejemplo n.º 28
0
void
dmu_objset_close(objset_t *os)
{
	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);

	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));
}
Ejemplo n.º 29
0
static int
dsl_dataset_user_release_check(void *arg, dmu_tx_t *tx)
{
	dsl_dataset_user_release_arg_t *ddura;
	dsl_holdfunc_t *holdfunc;
	dsl_pool_t *dp;
	nvpair_t *pair;

	if (!dmu_tx_is_syncing(tx))
		return (0);

	dp = dmu_tx_pool(tx);

	ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock));

	ddura = arg;
	holdfunc = ddura->ddura_holdfunc;

	for (pair = nvlist_next_nvpair(ddura->ddura_holds, NULL);
	    pair != NULL; pair = nvlist_next_nvpair(ddura->ddura_holds, pair)) {
		int error;
		dsl_dataset_t *ds;
		nvlist_t *holds;
		const char *snapname = nvpair_name(pair);

		error = nvpair_value_nvlist(pair, &holds);
		if (error != 0)
			error = (SET_ERROR(EINVAL));
		else
			error = holdfunc(dp, snapname, FTAG, &ds);
		if (error == 0) {
			error = dsl_dataset_user_release_check_one(ddura, ds,
			    holds, snapname);
			dsl_dataset_rele(ds, FTAG);
		}
		if (error != 0) {
			if (ddura->ddura_errlist != NULL) {
				fnvlist_add_int32(ddura->ddura_errlist,
				    snapname, error);
			}
			/*
			 * Non-existent snapshots are put on the errlist,
			 * but don't cause an overall failure.
			 */
			if (error != ENOENT)
				return (error);
		}
	}

	return (0);
}
Ejemplo n.º 30
0
static int
dsl_dataset_user_hold_check(void *arg, dmu_tx_t *tx)
{
	dsl_dataset_user_hold_arg_t *dduha = arg;
	dsl_pool_t *dp = dmu_tx_pool(tx);
	nvpair_t *pair;

	if (spa_version(dp->dp_spa) < SPA_VERSION_USERREFS)
		return (SET_ERROR(ENOTSUP));

	if (!dmu_tx_is_syncing(tx))
		return (0);

	for (pair = nvlist_next_nvpair(dduha->dduha_holds, NULL);
	    pair != NULL; pair = nvlist_next_nvpair(dduha->dduha_holds, pair)) {
		dsl_dataset_t *ds;
		int error = 0;
		char *htag, *name;

		/* must be a snapshot */
		name = nvpair_name(pair);
		if (strchr(name, '@') == NULL)
			error = SET_ERROR(EINVAL);

		if (error == 0)
			error = nvpair_value_string(pair, &htag);

		if (error == 0)
			error = dsl_dataset_hold(dp, name, FTAG, &ds);

		if (error == 0) {
			error = dsl_dataset_user_hold_check_one(ds, htag,
			    dduha->dduha_minor != 0, tx);
			dsl_dataset_rele(ds, FTAG);
		}

		if (error == 0) {
			fnvlist_add_string(dduha->dduha_chkholds, name, htag);
		} else {
			/*
			 * We register ENOENT errors so they can be correctly
			 * reported if needed, such as when all holds fail.
			 */
			fnvlist_add_int32(dduha->dduha_errlist, name, error);
			if (error != ENOENT)
				return (error);
		}
	}

	return (0);
}