1. 11 Mar, 2008 4 commits
  2. 10 Mar, 2008 9 commits
  3. 07 Mar, 2008 2 commits
    • Kirill A. Shutemov's avatar
    • Pavel Emelyanov's avatar
      [NET]: Make /proc/net a symlink on /proc/self/net (v3) · e9720acd
      Pavel Emelyanov authored
      
      
      Current /proc/net is done with so called "shadows", but current
      implementation is broken and has little chances to get fixed.
      
      The problem is that dentries subtree of /proc/net directory has
      fancy revalidation rules to make processes living in different
      net namespaces see different entries in /proc/net subtree, but
      currently, tasks see in the /proc/net subdir the contents of any
      other namespace, depending on who opened the file first.
      
      The proposed fix is to turn /proc/net into a symlink, which points
      to /proc/self/net, which in turn shows what previously was in
      /proc/net - the network-related info, from the net namespace the
      appropriate task lives in.
      
      # ls -l /proc/net
      lrwxrwxrwx  1 root root 8 Mar  5 15:17 /proc/net -> self/net
      
      In other words - this behaves like /proc/mounts, but unlike
      "mounts", "net" is not a file, but a directory.
      
      Changes from v2:
      * Fixed discrepancy of /proc/net nlink count and selinux labeling
        screwup pointed out by Stephen.
      
        To get the correct nlink count the ->getattr callback for /proc/net
        is overridden to read one from the net->proc_net entry.
      
        To make selinux still work the net->proc_net entry is initialized
        properly, i.e. with the "net" name and the proc_net parent.
      
      Selinux fixes are
      Acked-by: default avatarStephen Smalley <sds@tycho.nsa.gov>
      
      Changes from v1:
      * Fixed a task_struct leak in get_proc_task_net, pointed out by Paul.
      Signed-off-by: default avatarPavel Emelyanov <xemul@openvz.org>
      Acked-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      e9720acd
  4. 05 Mar, 2008 25 commits