Eric W. Biederman e51b6ba077
sysctl: Infrastructure for per namespace sysctls ...
This patch implements the basic infrastructure for per namespace sysctls.
A list of lists of sysctl headers is added, allowing each namespace to have
it's own list of sysctl headers.
Each list of sysctl headers has a lookup function to find the first
sysctl header in the list, allowing the lists to have a per namespace
instance.
register_sysct_root is added to tell sysctl.c about additional
lists of sysctl_headers. As all of the users are expected to be in
kernel no unregister function is provided.
sysctl_head_next is updated to walk through the list of lists.
__register_sysctl_paths is added to add a new sysctl table on
a non-default sysctl list.
The only intrusive part of this patch is propagating the information
to decided which list of sysctls to use for sysctl_check_table.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com >
Cc: Serge Hallyn <serue@us.ibm.com >
Cc: Daniel Lezcano <dlezcano@fr.ibm.com >
Cc: Cedric Le Goater <clg@fr.ibm.com >
Cc: Pavel Emelyanov <xemul@openvz.org >
Signed-off-by: Andrew Morton <akpm@linux-foundation.org >
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au >
Signed-off-by: David S. Miller <davem@davemloft.net >
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