From fc0ca9af180b91aad2fbf2fe3b16a12e1e05a760 Mon Sep 17 00:00:00 2001 From: Qu Wenruo Date: Mon, 6 Jan 2014 09:58:26 +0800 Subject: btrfs: Add noautodefrag mount option. Btrfs has autodefrag mount option but no pairing noautodefrag option, which makes it impossible to disable autodefrag without umount. Signed-off-by: Qu Wenruo Reviewed-by: David Sterba Signed-off-by: Josef Bacik Signed-off-by: Chris Mason --- fs/btrfs/super.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'fs/btrfs/super.c') diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index b02d25a64b2e..44513f3fbdc1 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -323,7 +323,7 @@ enum { Opt_no_space_cache, Opt_recovery, Opt_skip_balance, Opt_check_integrity, Opt_check_integrity_including_extent_data, Opt_check_integrity_print_mask, Opt_fatal_errors, Opt_rescan_uuid_tree, - Opt_commit_interval, Opt_barrier, + Opt_commit_interval, Opt_barrier, Opt_nodefrag, Opt_err, }; @@ -357,6 +357,7 @@ static match_table_t tokens = { {Opt_enospc_debug, "enospc_debug"}, {Opt_subvolrootid, "subvolrootid=%d"}, {Opt_defrag, "autodefrag"}, + {Opt_nodefrag, "noautodefrag"}, {Opt_inode_cache, "inode_cache"}, {Opt_no_space_cache, "nospace_cache"}, {Opt_recovery, "recovery"}, @@ -602,6 +603,11 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) btrfs_info(root->fs_info, "enabling auto defrag"); btrfs_set_opt(info->mount_opt, AUTO_DEFRAG); break; + case Opt_nodefrag: + if (btrfs_test_opt(root, AUTO_DEFRAG)) + btrfs_info(root->fs_info, "disabling auto defrag"); + btrfs_clear_opt(info->mount_opt, AUTO_DEFRAG); + break; case Opt_recovery: btrfs_info(root->fs_info, "enabling auto recovery"); btrfs_set_opt(info->mount_opt, RECOVERY); -- cgit v1.2.3