linux.git/net/netlabel, branch v4.11

netlabel: add CALIPSO to the list of built-in protocols

2017-01-07T03:20:45+00:00

When we added CALIPSO support in Linux v4.8 we forgot to add it to the
list of supported protocols with display at boot.

Signed-off-by: Paul Moore 
Signed-off-by: David S. Miller

genetlink: mark families as __ro_after_init

2016-10-27T20:16:09+00:00

Now genl_register_family() is the only thing (other than the
users themselves, perhaps, but I didn't find any doing that)
writing to the family struct.

In all families that I found, genl_register_family() is only
called from __init functions (some indirectly, in which case
I've add __init annotations to clarifly things), so all can
actually be marked __ro_after_init.

This protects the data structure from accidental corruption.

Signed-off-by: Johannes Berg 
Signed-off-by: David S. Miller

genetlink: statically initialize families

2016-10-27T20:16:09+00:00

Instead of providing macros/inline functions to initialize
the families, make all users initialize them statically and
get rid of the macros.

This reduces the kernel code size by about 1.6k on x86-64
(with allyesconfig).

Signed-off-by: Johannes Berg 
Signed-off-by: David S. Miller

genetlink: no longer support using static family IDs

2016-10-27T20:16:09+00:00

Static family IDs have never really been used, the only
use case was the workaround I introduced for those users
that assumed their family ID was also their multicast
group ID.

Additionally, because static family IDs would never be
reserved by the generic netlink code, using a relatively
low ID would only work for built-in families that can be
registered immediately after generic netlink is started,
which is basically only the control family (apart from
the workaround code, which I also had to add code for so
it would reserve those IDs)

Thus, anything other than GENL_ID_GENERATE is flawed and
luckily not used except in the cases I mentioned. Move
those workarounds into a few lines of code, and then get
rid of GENL_ID_GENERATE entirely, making it more robust.

Signed-off-by: Johannes Berg 
Signed-off-by: David S. Miller

netlabel: Implement CALIPSO config functions for SMACK.

2016-06-27T19:06:18+00:00

SMACK uses similar functions to control CIPSO, these are
the equivalent functions for CALIPSO and follow exactly
the same semantics.

int netlbl_cfg_calipso_add(struct calipso_doi *doi_def,
                           struct netlbl_audit *audit_info)
    Adds a CALIPSO doi.

void netlbl_cfg_calipso_del(u32 doi, struct netlbl_audit *audit_info)
    Removes a CALIPSO doi.

int netlbl_cfg_calipso_map_add(u32 doi, const char *domain,
                               const struct in6_addr *addr,
                               const struct in6_addr *mask,
                               struct netlbl_audit *audit_info)
    Creates a mapping between a domain and a CALIPSO doi.  If
    addr and mask are non-NULL this creates an address-selector
    type mapping.

This also extends netlbl_cfg_map_del() to remove IPv6 address-selector
mappings.

Signed-off-by: Huw Davies 
Signed-off-by: Paul Moore

calipso: Add a label cache.

2016-06-27T19:06:17+00:00

This works in exactly the same way as the CIPSO label cache.
The idea is to allow the lsm to cache the result of a secattr
lookup so that it doesn't need to perform the lookup for
every skbuff.

It introduces two sysctl controls:
 calipso_cache_enable - enables/disables the cache.
 calipso_cache_bucket_size - sets the size of a cache bucket.

Signed-off-by: Huw Davies 
Signed-off-by: Paul Moore

netlabel: Pass a family parameter to netlbl_skbuff_err().

2016-06-27T19:06:16+00:00

This makes it possible to route the error to the appropriate
labelling engine.  CALIPSO is far less verbose than CIPSO
when encountering a bogus packet, so there is no need for a
CALIPSO error handler.

Signed-off-by: Huw Davies 
Signed-off-by: Paul Moore

calipso: Allow the lsm to label the skbuff directly.

2016-06-27T19:06:15+00:00

In some cases, the lsm needs to add the label to the skbuff directly.
A NF_INET_LOCAL_OUT IPv6 hook is added to selinux to match the IPv4
behaviour.  This allows selinux to label the skbuffs that it requires.

Signed-off-by: Huw Davies 
Signed-off-by: Paul Moore

calipso: Allow request sockets to be relabelled by the lsm.

2016-06-27T19:05:29+00:00

Request sockets need to have a label that takes into account the
incoming connection as well as their parent's label.  This is used
for the outgoing SYN-ACK and for their child full-socket.

Signed-off-by: Huw Davies 
Signed-off-by: Paul Moore

calipso: Set the calipso socket label to match the secattr.

2016-06-27T19:02:51+00:00

CALIPSO is a hop-by-hop IPv6 option.  A lot of this patch is based on
the equivalent CISPO code.  The main difference is due to manipulating
the options in the hop-by-hop header.

Signed-off-by: Huw Davies 
Signed-off-by: Paul Moore