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libexec
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lsm.d
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Filename :
find_unused_lun.pyo
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� /�P`c @ s� d d l Z d d l Z d d l Z d d l Z d d l m Z m Z m Z m Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z e d k r� e � n d S( i����N( t Clientt LsmErrort ErrorNumbert LocalDiskc C s$ t j j | � t j j d � d S( Ns ( t syst stderrt write( t msg( ( s% /usr/libexec/lsm.d/find_unused_lun.pyt print_stderr s c C s� y* t j | t j � } t j | � t SWnS t k r } | j t j k rR t S| j t j k ry t t j d � � q� � n Xd S( s The manpage of open(2): There is one exception: on Linux 2.6 and later, O_EXCL can be used without O_CREAT if pathname refers to a block device. If the block device is in use by the system (e.g., mounted), open() fails with the error EBUSY. Even when disk has partitions, when all partitions are not used, this function still treats it as free disk. When specific disk or its partition is used by LVM, if there is no data stored in it, this function still treats it as free disk. s( Permission deny, try sudo or run as rootN( t ost opent O_EXCLt closet Truet OSErrort errnot EBUSYt Falset EACCESR R t PERMISSION_DENIED( t blk_patht fdt err( ( s% /usr/libexec/lsm.d/find_unused_lun.pyt is_free_disk s c C s� | t d � } d | } y t j | � } Wn t k rA d SXt | � d k rX d S| d } d | } d | } t | � � } | j � j d � s� d SWd QXt | � � } | j � j � SWd QXd S( s� Use `/sys/block/sdX/holders/dm-0/dm/name` to get mpath name, use `/sys/block/sdf/holders/dm-0/dm/uuid` to check whether holder is multipath. s /dev/s /sys/block/%s/holdersi i s /sys/block/%s/dm/names /sys/block/%s/dm/uuids mpath-N( t lenR t listdirt FileNotFoundErrort NoneR t readt startswitht strip( R t blk_namet sysfs_holder_foldert holderst holder_namet sysfs_dm_name_patht sysfs_dm_uuid_patht f( ( s% /usr/libexec/lsm.d/find_unused_lun.pyt get_mpath: s c C s$ t | � } | r t d | � St S( Ns /dev/mapper/%s( R& R R ( R t mpath_name( ( s% /usr/libexec/lsm.d/find_unused_lun.pyt is_free_multipathS s c C s� | j � } i } i } x' | D] } | j r | | | j <q q Wx� t j � D]� } t | � sm t | � rO y t j | � } Wn. t k r� } | j t j k r� qO n � n X| | k r� t d | � qO n | | | | <qO qO W| j � S( s> Return a list of lsm.Volume objects. Unused here means the LUN/volume meets one of following conditions: * the block device representing LUN/Volume could be opened with O_EXCL, which means its block is completely free. * The block device is used as PV of LVM, but not been used. s< Found free disk %s, but not managed by libstoragemgmt plugin( t volumest vpd83R t listR R( t vpd83_getR t codeR t NO_SUPPORTR t values( t ct volst vpd83_to_vol_hasht free_vol_dictt volt disk_pathR* t lsm_err( ( s% /usr/libexec/lsm.d/find_unused_lun.pyt find_unused_lunZ s( c C s� i | j d 6| j d 6| j d 6| j d 6| | j j d 6} t j | j � } | r� | | d <t | d � } | r� d | | d <q� n | S( Nt idt namet wwidt system_idt system_namet blk_pathsi s /dev/mapper/%st mpath_blk( R8 R9 R* R; R t vpd83_searchR& ( R4 t sys_dictt dR= R' ( ( s% /usr/libexec/lsm.d/find_unused_lun.pyt format_vol{ s c C s� t j d � } t j d � } | d k r= t d � d } n t | | � } t | � } | sr t d � t � n | j � } i } x | D] } | | | j <q� Wt d t | � � x+ | D]# } t j t | | � d d �GHq� Wd S( Nt LSMCLI_URIt LSMCLI_PASSWORDs4 LSMCLI_URI environment not defined, using 'local://'s local://s Didn't find any free LUNs Found %d free LUN(s): t indenti ( R t getenvR R R R7 t exitt systemsR8 R t jsont dumpsRB ( t urit passwordR0 t free_volst syssR@ t lsm_sysR4 ( ( s% /usr/libexec/lsm.d/find_unused_lun.pyt main� s" t __main__( R R RI R t lsmR R R R R R R& R( R7 RB RP t __name__( ( ( s% /usr/libexec/lsm.d/find_unused_lun.pyt <module> s " !