• Eric Paris's avatar
    IMA: move read counter into struct inode · a178d202
    Eric Paris authored
    IMA currently allocated an inode integrity structure for every inode in
    core.  This stucture is about 120 bytes long.  Most files however
    (especially on a system which doesn't make use of IMA) will never need
    any of this space.  The problem is that if IMA is enabled we need to
    know information about the number of readers and the number of writers
    for every inode on the box.  At the moment we collect that information
    in the per inode iint structure and waste the rest of the space.  This
    patch moves those counters into the struct inode so we can eventually
    stop allocating an IMA integrity structure except when absolutely
    This patch does the minimum needed to move the location of the data.
    Further cleanups, especially the location of counter updates, may still
    be possible.
    Signed-off-by: default avatarEric Paris <eparis@redhat.com>
    Acked-by: default avatarMimi Zohar <zohar@linux.vnet.ibm.com>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
inode.c 40.6 KB