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Btrfs: Add mount -o nossd

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

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2009-06-09 16:42:22 -04:00
parent d644d8a1e3
commit 3b30c22f64
1 changed files with 7 additions and 2 deletions
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9
fs/btrfs/super.c
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@ -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);