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Editing: plugin_mounts.cpython-36.opt-1.pyc
3 �<�e� � @ sp d dl jZddlmZ ddlT d dlmZmZ d dlZ d dl m Z d dl Z e j j� Ze � ZG dd� dej�ZdS ) � N� )�base)�*)�Popen�PIPE)�commandsc @ st e Zd ZdZedd� �Zdd� Zedd� �Zdd � Zd d � Z d d � Z dd� Z dd� Z dd� Z eddd�dd� �ZdS )� MountsPluginaP `mounts`:: Enables or disables barriers for mounts according to the value of the [option]`disable_barriers` option. The [option]`disable_barriers` option has an optional value `force` which disables barriers even on mountpoints with write back caches. Note that only extended file systems (ext) are supported by this plug-in. c C s� i }d}t dddgttddd�j� \}}x�dd� |j� D �D ]�}t|�d k rNq<|dd � \}}}t|�d krt|d nd} t|�d kr�|d nd} |d kr�|}q<|d ks<|dkr�q<| dks<| dkr�q<|j| t� || d�� || d j|� q<W || _dS )z� Gets the information about disks, partitions and mountpoints. Stores information about used filesystem and creates a list of all underlying devices (in case of LVM) for each mountpoint. NZlsblkz-rnoz TYPE,RM,KNAME,FSTYPE,MOUNTPOINTT)�stdout�stderrZ close_fdsZuniversal_newlinesc S s g | ] }|j � �qS � )�split)�.0�liner r �#/usr/lib/python3.6/plugin_mounts.py� <listcomp>$ s z>MountsPlugin._generate_mountpoint_topology.<locals>.<listcomp>� � Zdisk�1�part�lvmz[SWAP])�disks� device_name� filesystemr )r r ) r r Z communicate� splitlines�len� setdefault�set�add�_mountpoint_topology) �clsZmountpoint_topologyZ current_diskr r �columnsZ device_typeZdevice_removabler r � mountpointr r r � _generate_mountpoint_topology s, z*MountsPlugin._generate_mountpoint_topologyc C s* | j � d| _t| jj� �| _t� | _d S )NT)r" Z_devices_supportedr r �keysZ _free_devicesZ_assigned_devices)�selfr r r � _init_devices; s zMountsPlugin._init_devicesc C s dd iS )N�disable_barriersr )r$ r r r �_get_config_optionsA s z MountsPlugin._get_config_optionsc C s d|_ d|_d S )NFT)Z_has_dynamic_tuningZ_has_static_tuning)r$ �instancer r r �_instance_initG s zMountsPlugin._instance_initc C s d S )Nr )r$ r( r r r �_instance_cleanupK s z MountsPlugin._instance_cleanupc C s, t j d| �}x|D ]}tj|�j� S W dS )zV Get device cache type. This will work only for devices on SCSI kernel subsystem. z+/sys/block/%s/device/scsi_disk/*/cache_typeN)�glob�cmdZ read_file�strip)r$ �deviceZsource_filenamesZsource_filenamer r r �_get_device_cache_typeN s z#MountsPlugin._get_device_cache_typec C s. x(| j | d D ]}| j|�dkrdS qW dS )zr Checks if the device has 'write back' cache. If the cache type cannot be determined, asume some other cache. r z write backTF)r r/ )r$ r! r. r r r � _mountpoint_has_writeback_cacheW s z,MountsPlugin._mountpoint_has_writeback_cachec C s� t d��H}x@|D ]4}|j� }|d d dkr.q|d |kr|d }P qW dS W dQ R X |jd�}xH|D ]<}|jd�\}} } |d ks�|d kr�| d kr�d S |d krfd S qfW d S dS )zP Checks if a given mountpoint is mounted with barriers enabled or disabled. z /proc/mountsr �/r r N�,�=Z nobarrierZbarrier�0FT)�openr � partition) r$ r! Z mounts_filer r Z option_list�optionsZoption�name�sep�valuer r r �_mountpoint_has_barriers` s" z%MountsPlugin._mountpoint_has_barriersc C s d|dd| g}t j|� dS )z Remounts partition. z/usr/bin/mountz-oz remount,%sN)r, Zexecute)r$ r6 r7 Zremount_commandr r r �_remount_partition} s z MountsPlugin._remount_partitionr& T)Z per_devicec C sZ | j d|d�}t|�j� dk}|p*| j|�}|�r |s:d S d }| j| d jd�sXd}nl| rn| j|�rnd}nV| j|�} | d kr�d}n>| d kr�|r�tj t j | � d S d }n|r�tj t j | � d S |d k r�tj d ||f � d S | jj|| � tj d | � | j|d� nJ|�rd S | jj|�} | d k�r0d S tj d| � | j|d� | jj|� d S )Nr& )Z command_namer �forcer Zextzfilesystem not supportedz device uses write back cachezunknown current settingFTzbarriers already disabledz#not disabling barriers on '%s' (%s)zdisabling barriers on '%s'z barrier=0zenabling barriers on '%s'z barrier=1)Z _storage_key�str�lowerZ _option_boolr � startswithr0 r; �log�info�constsZSTR_VERIFY_PROFILE_OK�errorZSTR_VERIFY_PROFILE_FAILZ_storager r< �getZunset) r$ �startr: r! ZverifyZignore_missingZ storage_keyr= Z reject_reason�original_valuer r r �_disable_barriers� sN z MountsPlugin._disable_barriersN)�__name__� __module__� __qualname__�__doc__� classmethodr" r% r' r) r* r/ r0 r; r< Zcommand_customrH r r r r r s $ r )Z tuned.constsrC � r Z decorators� subprocessr r Z tuned.logsZtunedZtuned.utils.commandsr r+ ZlogsrE rA r, ZPluginr r r r r �<module> s
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