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Badari Pulavarty
e3222c4ecc
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 feedback. - 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. [[email protected]: cleanups, warning fix] [[email protected]: remove dup_namespaces() declaration] [[email protected]: fix CONFIG_IPC_NS=n, clone(CLONE_NEWIPC) retval] [[email protected]: fix build with CONFIG_SYSVIPC=n] Signed-off-by: Badari Pulavarty <[email protected]> Signed-off-by: Serge Hallyn <[email protected]> Cc: Cedric Le Goater <[email protected]> Cc: "Eric W. Biederman" <[email protected]> Cc: <[email protected]> Signed-off-by: Cedric Le Goater <[email protected]> Cc: Oleg Nesterov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>