ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock));
- os = kmem_zalloc(sizeof (objset_t), KM_SLEEP);
+ os = kmem_zalloc(sizeof (objset_t), KM_PUSHPAGE);
os->os_dsl_dataset = ds;
os->os_spa = spa;
os->os_rootbp = bp;
return (0);
}
+/*
+ * Determine the objset id for a given snapshot name.
+ */
+int
+dmu_snapshot_id(objset_t *os, const char *snapname, uint64_t *idp)
+{
+ dsl_dataset_t *ds = os->os_dsl_dataset;
+ zap_cursor_t cursor;
+ zap_attribute_t attr;
+ int error;
+
+ if (ds->ds_phys->ds_snapnames_zapobj == 0)
+ return (ENOENT);
+
+ zap_cursor_init(&cursor, ds->ds_dir->dd_pool->dp_meta_objset,
+ ds->ds_phys->ds_snapnames_zapobj);
+
+ error = zap_cursor_move_to_key(&cursor, snapname, MT_EXACT);
+ if (error) {
+ zap_cursor_fini(&cursor);
+ return (error);
+ }
+
+ error = zap_cursor_retrieve(&cursor, &attr);
+ if (error) {
+ zap_cursor_fini(&cursor);
+ return (error);
+ }
+
+ *idp = attr.za_first_integer;
+ zap_cursor_fini(&cursor);
+
+ return (0);
+}
+
int
dmu_dir_list_next(objset_t *os, int namelen, char *name,
uint64_t *idp, uint64_t *offp)
}
#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_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);