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Commit 3b30c22f authored by Chris Mason's avatar Chris Mason
Browse files

Btrfs: Add mount -o nossd 



This allows you to turn off the ssd mode via remount.

Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent d644d8a1

fs/btrfs/super.c

+7 −2
Original line number Diff line number Diff line
@@ -66,8 +66,8 @@ static void btrfs_put_super(struct super_block *sb) 
enum {

	Opt_degraded, Opt_subvol, Opt_device, Opt_nodatasum, Opt_nodatacow,

	Opt_max_extent, Opt_max_inline, Opt_alloc_start, Opt_nobarrier,

	Opt_ssd, Opt_thread_pool, Opt_noacl,  Opt_compress, Opt_notreelog,

	Opt_ratio, Opt_flushoncommit, Opt_err,

	Opt_ssd, Opt_nossd, Opt_thread_pool, Opt_noacl,  Opt_compress,

	Opt_notreelog, Opt_ratio, Opt_flushoncommit, Opt_err,

};



static match_table_t tokens = {
@@ -83,6 +83,7 @@ static match_table_t tokens = { 
	{Opt_thread_pool, "thread_pool=%d"},

	{Opt_compress, "compress"},

	{Opt_ssd, "ssd"},

	{Opt_nossd, "nossd"},

	{Opt_noacl, "noacl"},

	{Opt_notreelog, "notreelog"},

	{Opt_flushoncommit, "flushoncommit"},
@@ -173,6 +174,10 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) 
			printk(KERN_INFO "btrfs: use ssd allocation scheme\n");

			btrfs_set_opt(info->mount_opt, SSD);

			break;

		case Opt_nossd:

			printk(KERN_INFO "btrfs: not using ssd allocation scheme\n");

			btrfs_clear_opt(info->mount_opt, SSD);

			break;

		case Opt_nobarrier:

			printk(KERN_INFO "btrfs: turning off barriers\n");

			btrfs_set_opt(info->mount_opt, NOBARRIER);