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C API : lvm_lsvg() documentation ?

  • 1.  C API : lvm_lsvg() documentation ?

    Posted 12/05/08 04:37 AM

    Originally posted by: SystemAdmin


    Hi,

    I'm using AIX 6.1(6100-00-02-0750). I'm trying, in a C program, to list all raw devices, removing (for performance reasons) the calls to "popen(lsvg)" that are currently in place. I'm looking for the C API that gives me the type of a logical volume. This information is available in the "TYPE" column of the output of "lsvg -l VOL":

    
# lsvg -l rootvg rootvg: LV NAME             TYPE       LPs     PPs     PVs  LV STATE      MOUNT POINT hd5                 boot       1       1       1    closed/syncd  N/A hd6                 paging     16      16      1    open/syncd    N/A hd8                 jfs2log    1       1       1    open/syncd    N/A hd4                 jfs2       4       4       1    open/syncd    /  hd2                 jfs2       79      79      1    open/syncd    /usr hd9var              jfs2       1       1       1    open/syncd    /var # lsvg -l rawvg rawvg: LV NAME             TYPE       LPs     PPs     PVs  LV STATE      MOUNT POINT rawlv0              raw        30      30      1    closed/syncd  N/A


    Using liblvm.a::lvm_queryvg() I get the list of LVs associated with the VG. Then, using lvm_querylv(), I get informations about the LV, but nothing about the TYPE. Note that the mount point listed in lsvg output is the one listed in /etc/filesystems, which can be different from the real mount point at the time of lsvg execution. This is not the case with the TYPE column which is always "actual". Where does lsvg takes this information from ?

    Executing :
    
# truss -u liblvm.a:* lsvg -l rootvg

    I can read that the lsvg binary calls a function named "lvm_lsvg". This function is not present on my system in /usr/include,
    but present in liblvm.a. I did not find any information about it on IBM website. Is it the API that I need ? Where do I get the doc about it ?
    #AIX-Forum