Btrfsのマウントオプションが分からんかった

まだ kernel.org クラックの余韻が...

• http://btrfs.wiki.kernel.org/

落ちてる．（追記：もう復活してます．）ローカルで man 見ても書いてない．mkfs.btrfs(8) ならあったが... 違うだろ．しょうがないのでソース．最初に Documentatioin/filesystems/btrfs.txt 見たが期待するだけ無駄だった...

static match_table_t tokens = {

        {Opt_degraded, "degraded"},

        {Opt_subvol, "subvol=%s"},

        {Opt_subvolid, "subvolid=%d"},

        {Opt_device, "device=%s"},

        {Opt_nodatasum, "nodatasum"},

        {Opt_nodatacow, "nodatacow"},

        {Opt_nobarrier, "nobarrier"},

        {Opt_max_inline, "max_inline=%s"},

        {Opt_alloc_start, "alloc_start=%s"},

        {Opt_thread_pool, "thread_pool=%d"},

        {Opt_compress, "compress"},

        {Opt_compress_type, "compress=%s"},

        {Opt_compress_force, "compress-force"},

        {Opt_compress_force_type, "compress-force=%s"},

        {Opt_ssd, "ssd"},

        {Opt_ssd_spread, "ssd_spread"},

        {Opt_nossd, "nossd"},

        {Opt_noacl, "noacl"},

        {Opt_notreelog, "notreelog"},

        {Opt_flushoncommit, "flushoncommit"},

        {Opt_ratio, "metadata_ratio=%d"},

        {Opt_discard, "discard"},

        {Opt_space_cache, "space_cache"},

        {Opt_clear_cache, "clear_cache"},

        {Opt_user_subvol_rm_allowed, "user_subvol_rm_allowed"},

        {Opt_enospc_debug, "enospc_debug"},

        {Opt_subvolrootid, "subvolrootid=%d"},

        {Opt_defrag, "autodefrag"},

        {Opt_inode_cache, "inode_cache"},

        {Opt_err, NULL},

};