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Currently, "btrfs quota enable" would fail after "btrfs quota disable" on the first time with syslog output "qgroup_rescan_init failed with -22", but it would succeed on the second time. When "quota disable" is called, BTRFS_FS_QUOTA_DISABLING flag bit will be set in fs_info->flags in btrfs_quota_disable(), but it will not be droppd in btrfs_run_qgroups() (which is called in btrfs_commit_transaction()) because quota_root has already been freed. If "quota enable" is called after that, both BTRFS_FS_QUOTA_DISABLING and BTRFS_FS_QUOTA_ENABLED flag would be dropped in the btrfs_run_qgroups() since quota_root is not NULL. This leads to the failure of "quota enable" on the first time. BTRFS_FS_QUOTA_DISABLING flag is not used outside of "quota disable" context and is equivalent to whether quota_root is NULL or not. btrfs_run_qgroups() checks whether quota_root is NULL or not in the first place. So, let's remove BTRFS_FS_QUOTA_DISABLING flag. Signed-off-by: Tomohiro Misono <misono.tomohiro@jp.fujitsu.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.