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OS-1566 filesystem limits for ZFS datasets

*** 1263,1272 **** --- 1263,1282 ---- (prop == ZFS_PROP_QUOTA || prop == ZFS_PROP_REFQUOTA)) { zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "use 'none' to disable quota/refquota")); goto error; } + + /* + * Special handling for "*_limit=none". In this case it's not + * 0 but UINT64_MAX. + */ + if ((type & ZFS_TYPE_DATASET) && isnone && + (prop == ZFS_PROP_FILESYSTEM_LIMIT || + prop == ZFS_PROP_SNAPSHOT_LIMIT)) { + *ivalp = UINT64_MAX; + } break; case PROP_TYPE_INDEX: if (datatype != DATA_TYPE_STRING) { zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,