From: Eric W. Biederman Date: Sun, 13 Jun 2010 03:28:03 +0000 (+0000) Subject: user_ns: Introduce user_nsmap_uid and user_ns_map_gid. X-Git-Tag: v2.6.36-rc1~571^2~555 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5c1469de7545a35a16ff2b902e217044a7d2f8a5;p=pandora-kernel.git user_ns: Introduce user_nsmap_uid and user_ns_map_gid. Define what happens when a we view a uid from one user_namespace in another user_namepece. - If the user namespaces are the same no mapping is necessary. - For most cases of difference use overflowuid and overflowgid, the uid and gid currently used for 16bit apis when we have a 32bit uid that does fit in 16bits. Effectively the situation is the same, we want to return a uid or gid that is not assigned to any user. - For the case when we happen to be mapping the uid or gid of the creator of the target user namespace use uid 0 and gid as confusing that user with root is not a problem. Signed-off-by: Eric W. Biederman Acked-by: Serge E. Hallyn Signed-off-by: David S. Miller --- Reading git-diff-tree failed