Btrfs: Add mount -o nossd
This allows you to turn off the ssd mode via remount. Signed-off-by: Chris Mason <chris.mason@oracle.com>
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@ -66,8 +66,8 @@ static void btrfs_put_super(struct super_block *sb)
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enum {
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enum {
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Opt_degraded, Opt_subvol, Opt_device, Opt_nodatasum, Opt_nodatacow,
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Opt_degraded, Opt_subvol, Opt_device, Opt_nodatasum, Opt_nodatacow,
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Opt_max_extent, Opt_max_inline, Opt_alloc_start, Opt_nobarrier,
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Opt_max_extent, Opt_max_inline, Opt_alloc_start, Opt_nobarrier,
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Opt_ssd, Opt_thread_pool, Opt_noacl, Opt_compress, Opt_notreelog,
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Opt_ssd, Opt_nossd, Opt_thread_pool, Opt_noacl, Opt_compress,
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Opt_ratio, Opt_flushoncommit, Opt_err,
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Opt_notreelog, Opt_ratio, Opt_flushoncommit, Opt_err,
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};
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};
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static match_table_t tokens = {
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static match_table_t tokens = {
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@ -83,6 +83,7 @@ static match_table_t tokens = {
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{Opt_thread_pool, "thread_pool=%d"},
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{Opt_thread_pool, "thread_pool=%d"},
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{Opt_compress, "compress"},
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{Opt_compress, "compress"},
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{Opt_ssd, "ssd"},
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{Opt_ssd, "ssd"},
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{Opt_nossd, "nossd"},
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{Opt_noacl, "noacl"},
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{Opt_noacl, "noacl"},
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{Opt_notreelog, "notreelog"},
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{Opt_notreelog, "notreelog"},
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{Opt_flushoncommit, "flushoncommit"},
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{Opt_flushoncommit, "flushoncommit"},
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@ -173,6 +174,10 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
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printk(KERN_INFO "btrfs: use ssd allocation scheme\n");
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printk(KERN_INFO "btrfs: use ssd allocation scheme\n");
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btrfs_set_opt(info->mount_opt, SSD);
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btrfs_set_opt(info->mount_opt, SSD);
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break;
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break;
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case Opt_nossd:
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printk(KERN_INFO "btrfs: not using ssd allocation scheme\n");
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btrfs_clear_opt(info->mount_opt, SSD);
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break;
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case Opt_nobarrier:
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case Opt_nobarrier:
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printk(KERN_INFO "btrfs: turning off barriers\n");
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printk(KERN_INFO "btrfs: turning off barriers\n");
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btrfs_set_opt(info->mount_opt, NOBARRIER);
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btrfs_set_opt(info->mount_opt, NOBARRIER);
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