1. 09 Mar, 2019 4 commits
    • J. R. Okajima's avatar
      aufs: ioctl, ibusy · 8ea77cf9
      J. R. Okajima authored
      
      
      Because of some inode is in use, the deletion of a branch can fail.
      For those who wants to test the inode is busy or not, aufs provides an
      ioctl, and a utility 'aubusy' in aufs-util.git.
      Signed-off-by: default avatarJ. R. Okajima <hooanon05g@gmail.com>
      8ea77cf9
    • J. R. Okajima's avatar
      aufs: ioctl, rdu (readdir in userspace) · 681a21c3
      J. R. Okajima authored
      
      
      For a directory which has millions of files, aufs VDIR consumes
      much memory. In this case, RDU (readdir(3) in user-space) is definitely
      better.
      If you enable CONFIG_AUFS_RDU at compiling aufs, install libau.so from
      aufs-util.git, and set some environment variables, then you can use this
      feature. When readdir(3) in libau.so receives an aufs dir, it issues
      ioctl(2) instead of regular readdir(3).
      All merging and whiteout handling are done in userspace.
      Signed-off-by: default avatarJ. R. Okajima <hooanon05g@gmail.com>
      681a21c3
    • J. R. Okajima's avatar
      aufs: ioctl, brinfo · 0d7d5cf2
      J. R. Okajima authored
      
      
      Provide info about the branches, which will be used from user-space.
      This is essentially equivalent to the entries under sysfs
      (/sys/fs/aufs/si_*/).
      But the ioctl behaviour is atomic and never confuse the matching of the
      branch id.
      Signed-off-by: default avatarJ. R. Okajima <hooanon05g@gmail.com>
      0d7d5cf2
    • J. R. Okajima's avatar
      aufs: ioctl, wbr_fd · de0ee5c9
      J. R. Okajima authored
      
      
      Provide a file descriptor corresponding the specified writable branch.
      The file descriptor will be used from user-space such as FHSM and
      libau.so. For details, see aufs-util.git.
      Signed-off-by: default avatarJ. R. Okajima <hooanon05g@gmail.com>
      de0ee5c9