• Badari Pulavarty's avatar
    Merge sys_clone()/sys_unshare() nsproxy and namespace handling · e3222c4e
    Badari Pulavarty authored
    sys_clone() and sys_unshare() both makes copies of nsproxy and its associated
    namespaces.  But they have different code paths.
    This patch merges all the nsproxy and its associated namespace copy/clone
    handling (as much as possible).  Posted on container list earlier for
    - Create a new nsproxy and its associated namespaces and pass it back to
      caller to attach it to right process.
    - Changed all copy_*_ns() routines to return a new copy of namespace
      instead of attaching it to task->nsproxy.
    - Moved the CAP_SYS_ADMIN checks out of copy_*_ns() routines.
    - Removed unnessary !ns checks from copy_*_ns() and added BUG_ON()
      just incase.
    - Get rid of all individual unshare_*_ns() routines and make use of
      copy_*_ns() instead.
    [akpm@osdl.org: cleanups, warning fix]
    [clg@fr.ibm.com: remove dup_namespaces() declaration]
    [serue@us.ibm.com: fix CONFIG_IPC_NS=n, clone(CLONE_NEWIPC) retval]
    [akpm@linux-foundation.org: fix build with CONFIG_SYSVIPC=n]
    Signed-off-by: default avatarBadari Pulavarty <pbadari@us.ibm.com>
    Signed-off-by: default avatarSerge Hallyn <serue@us.ibm.com>
    Cc: Cedric Le Goater <clg@fr.ibm.com>
    Cc: "Eric W. Biederman" <ebiederm@xmission.com>
    Cc: <containers@lists.osdl.org>
    Signed-off-by: default avatarCedric Le Goater <clg@fr.ibm.com>
    Cc: Oleg Nesterov <oleg@tv-sign.ru>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
util.c 19.3 KB