Sven Eckelmann [Sun, 10 Jul 2016 13:47:57 +0000 (15:47 +0200)]
batman-adv: Keep batadv netdev when hardif disappears
Switch-like virtual interfaces like bridge or openvswitch don't destroy
itself when all their attached netdevices dissappear. Instead they only
remove the link to the unregistered device and keep working until they get
removed manually.
This has the benefit that all configurations for this interfaces are kept
and daemons reacting to rtnl events can just add new slave interfaces
without going through the complete configuration of the switch-like
netdevice.
Handling unregister events of client devices similar in batman-adv allows
users to drop their current workaround of dummy netdevices attached to
batman-adv soft-interfaces.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Fri, 15 Jul 2016 15:39:33 +0000 (17:39 +0200)]
batman-adv: Place kref_get for tvlv_handler near use
It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems caused by incorrect reference counting.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Fri, 15 Jul 2016 15:39:32 +0000 (17:39 +0200)]
batman-adv: Place kref_get for tvlv_container near use
It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems caused by incorrect reference counting.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Fri, 15 Jul 2016 15:39:31 +0000 (17:39 +0200)]
batman-adv: Place kref_get for nc_path near use
It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems caused by incorrect reference counting.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Fri, 15 Jul 2016 15:39:30 +0000 (17:39 +0200)]
batman-adv: Place kref_get for nc_node near use
It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems caused by incorrect reference counting.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Fri, 15 Jul 2016 15:39:29 +0000 (17:39 +0200)]
batman-adv: Place kref_get for softif_vlan near use
It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems caused by incorrect reference counting.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Fri, 15 Jul 2016 15:39:28 +0000 (17:39 +0200)]
batman-adv: Place kref_get for hard_iface near use
It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems caused by incorrect reference counting.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Fri, 15 Jul 2016 15:39:27 +0000 (17:39 +0200)]
batman-adv: Place kref_get for gw_node near use
It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems caused by incorrect reference counting.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Fri, 15 Jul 2016 15:39:26 +0000 (17:39 +0200)]
batman-adv: Place kref_get for dat_entry near use
It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems caused by incorrect reference counting.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Fri, 15 Jul 2016 15:39:25 +0000 (17:39 +0200)]
batman-adv: Place kref_get for bla_backbone_gw near use
It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems caused by incorrect reference counting.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Fri, 15 Jul 2016 15:39:24 +0000 (17:39 +0200)]
batman-adv: Place kref_get for bla_claim near use
It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems caused by incorrect reference counting.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Fri, 15 Jul 2016 15:39:23 +0000 (17:39 +0200)]
batman-adv: Place kref_get for tt_common near use
It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems caused by incorrect reference counting.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Fri, 15 Jul 2016 15:39:22 +0000 (17:39 +0200)]
batman-adv: Place kref_get for tt_local_entry near use
It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems caused by incorrect reference counting.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Fri, 15 Jul 2016 15:39:21 +0000 (17:39 +0200)]
batman-adv: Place kref_get for orig_node near use
It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems caused by incorrect reference counting.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Fri, 15 Jul 2016 15:39:20 +0000 (17:39 +0200)]
batman-adv: Place kref_get for neigh_node near use
It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems caused by incorrect reference counting.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Fri, 15 Jul 2016 15:39:19 +0000 (17:39 +0200)]
batman-adv: Place kref_get for neigh_ifinfo near use
It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems caused by incorrect reference counting.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Fri, 15 Jul 2016 15:39:18 +0000 (17:39 +0200)]
batman-adv: Place kref_get for tt_orig_list_entry near use
It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems caused by incorrect reference counting.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Fri, 15 Jul 2016 15:39:17 +0000 (17:39 +0200)]
batman-adv: Place kref_get for orig_ifinfo near use
It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems caused by incorrect reference counting.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Fri, 15 Jul 2016 15:39:16 +0000 (17:39 +0200)]
batman-adv: Place kref_get for orig_node_vlan near use
It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems caused by incorrect reference counting.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Andrew Lunn [Sun, 3 Jul 2016 11:31:48 +0000 (13:31 +0200)]
batman-adv: Indicate netlink socket can be used with netns.
Set the netnsof flag on the family structure, indicating it can
be used with different network name spaces.
Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Dump the list of bridge loop avoidance backbones via the netlink socket.
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Sven Eckelmann [Sun, 3 Jul 2016 11:31:46 +0000 (13:31 +0200)]
batman-adv: Provide bla group in the mesh_info netlink msg
The bridge loop avoidange is the main information for the debugging of of
bridge loop detection problems. It is therefore necessary when comparing
the bla claim tables.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Sven Eckelmann [Sun, 3 Jul 2016 11:31:44 +0000 (13:31 +0200)]
batman-adv: add B.A.T.M.A.N. V bat_gw_dump implementations
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Andrew Lunn [Sun, 3 Jul 2016 11:31:43 +0000 (13:31 +0200)]
batman-adv: add B.A.T.M.A.N. IV bat_gw_dump implementations
Dump the list of gateways via the netlink socket.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
[sven.eckelmann@open-mesh.com: integrate in batadv_algo_ops] Signed-off-by: Sven Eckelmann <sven.eckelmann@open-mesh.com> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Sven Eckelmann [Sun, 3 Jul 2016 11:31:42 +0000 (13:31 +0200)]
batman-adv: netlink: add gateway table queries
Add BATADV_CMD_GET_GATEWAYS commands, using handlers bat_gw_dump in
batadv_algo_ops. Will always return -EOPNOTSUPP for now, as no
implementations exist yet.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
batman-adv: netlink: add originator and neighbor table queries
Add BATADV_CMD_GET_ORIGINATORS and BATADV_CMD_GET_NEIGHBORS commands,
using handlers bat_orig_dump and bat_neigh_dump in batadv_algo_ops. Will
always return -EOPNOTSUPP for now, as no implementations exist yet.
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net> Signed-off-by: Andrew Lunn <andrew@lunn.ch>
[sven@narfation.org: Rewrite based on new algo_ops structures] Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Sven Eckelmann [Sun, 3 Jul 2016 11:31:38 +0000 (13:31 +0200)]
batman-adv: Provide TTVN in the mesh_info netlink msg
The TTVN is the main information for the debugging of translation table
problems. It is therefore necessary when comparing the global translation
tables.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
This adds the commands BATADV_CMD_GET_TRANSTABLE_LOCAL and
BATADV_CMD_GET_TRANSTABLE_GLOBAL, which correspond to the transtable_local
and transtable_global debugfs files.
The batadv_tt_client_flags enum is moved to the UAPI to expose it as part
of the netlink API.
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net> Signed-off-by: Andrew Lunn <andrew@lunn.ch>
[sven.eckelmann@open-mesh.com: add policy for attributes, fix includes] Signed-off-by: Sven Eckelmann <sven.eckelmann@open-mesh.com>
[sw@simonwunderlich.de: fix VID attributes content] Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
BATADV_CMD_GET_HARDIFS will return the list of hardifs (including index,
name and MAC address) of all hardifs for a given softif.
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net> Signed-off-by: Andrew Lunn <andrew@lunn.ch>
[sven.eckelmann@open-mesh.com: Reduce the number of changes to
BATADV_CMD_GET_HARDIFS, add policy for attributes] Signed-off-by: Sven Eckelmann <sven.eckelmann@open-mesh.com> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
BATADV_CMD_GET_ROUTING_ALGOS is used to get the list of supported routing
algorithms.
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net> Signed-off-by: Andrew Lunn <andrew@lunn.ch>
[sven.eckelmann@open-mesh.com: Reduce the number of changes to
BATADV_CMD_GET_ROUTING_ALGOS, fix includes] Signed-off-by: Sven Eckelmann <sven.eckelmann@open-mesh.com> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Andrew Lunn [Sun, 3 Jul 2016 11:31:34 +0000 (13:31 +0200)]
batman-adv: Suppress debugfs entries for netns's
Debugfs is not netns aware. It thus has problems when the same
interface name exists in multiple network name spaces.
Work around this by not creating entries for interfaces in name spaces
other than the default name space. This means meshes in network
namespaces cannot be managed via debugfs, but there will soon be a
netlink interface which is netns aware.
Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Andrew Lunn [Sun, 3 Jul 2016 11:31:33 +0000 (13:31 +0200)]
batman-adv: Handle parent interfaces in a different netns
batman-adv tries to prevent the user from placing a batX soft
interface into another batman mesh as a hard interface. It does this
by walking up the devices list of parents and ensures they are all
none batX interfaces. iflink can point to an interface in a different
namespace, so also retrieve the parents name space when finding the
parent and use it when doing the comparison.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
[sven@narfation.org: Fix alignments, simplify parent netns retrieval] Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Sven Eckelmann [Wed, 29 Jun 2016 21:45:57 +0000 (23:45 +0200)]
batman-adv: Fix consistency of update route messages
The debug messages of _batadv_update_route were printed before the actual
route change is done. At this point it is not really known which
curr_router will be replaced. Thus the messages could print the wrong
operation.
Printing the debug messages after the operation was done avoids this
problem.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Mon, 27 Jun 2016 06:15:42 +0000 (08:15 +0200)]
batman-adv: Remove orig_node reference handling from send_skb_unicast
The function batadv_send_skb_unicast is not acquiring a reference for an
orig_node nor removing it from any datastructure. It still reduces the
reference counter for an object which is still in the hands of the caller.
This is confusing and can lead in the future to problems in the reference
handling of the caller function.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Acked-by: Linus Lüssing <linus.luessing@c0d3.blue> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Sat, 25 Jun 2016 14:44:06 +0000 (16:44 +0200)]
batman-adv: use kmem_cache for translation table
The translation table (global, local) is usually the part of batman-adv
which has the most dynamical allocated objects. Most of them
(tt_local_entry, tt_global_entry, tt_orig_list_entry, tt_change_node,
tt_req_node, tt_roam_node) are equally sized. So it makes sense to have
them allocated from a kmem_cache for each type.
This approach allowed a small wireless router (TP-Link TL-841NDv8; SLUB
allocator) to store 34% more translation table entries compared to the
current implementation.
This patch abstracts the forward packet creation into the new function
batadv_forw_packet_alloc().
The queue counting and interface reference counters are now handled
internally within batadv_forw_packet_alloc() and its
batadv_forw_packet_free() counterpart. This should reduce the risk of
having reference/queue counting bugs again and should increase
code readibility.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Markus Pargmann [Sun, 3 Jul 2016 09:07:14 +0000 (11:07 +0200)]
batman-adv: iv_ogm, Reduce code duplication
The difference between tq1 and tq2 are calculated the same way in two
separate functions.
This patch moves the common code to a separate function
'batadv_iv_ogm_neigh_diff' which handles everything necessary. The other
two functions can then handle errors and use the difference directly.
Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
[sven@narfation.org: rebased on current version, initialize return variable
in batadv_iv_ogm_neigh_diff, add kerneldoc, convert to bool return type] Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
batman-adv: disable sysfs knobs when GW-mode is not implemented
Now that the GW-mode code is algorithm specific, batman-adv expects the
routing algorithm to implement some APIs to make it work.
However, such APIs are not mandatory, therefore we might have algorithms
not providing them. In this case all the sysfs knobs related to GW-mode
should be deactivated to make sure that settings injected by the user
for this feature are rejected.
Signed-off-by: Antonio Quartulli <a@unstable.cc> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
batman-adv: B.A.T.M.A.N. V - implement GW selection logic
Since the GW selection logic has been made routing protocol specific
it is now possible for B.A.T.M.A.N V to have its own mechanism by
providing the API implementation.
Implement the GW specific API in the B.A.T.M.A.N. V protocol in
order to provide a working GW selection mechanism.
Signed-off-by: Antonio Quartulli <a@unstable.cc> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
batman-adv: make GW election code protocol specific
Each routing protocol may have its own specific logic about
gateway election which is potentially based on the metric being
used.
Create two GW specific API functions and move the current election
logic in the B.A.T.M.A.N. IV specific code.
Signed-off-by: Antonio Quartulli <a@unstable.cc> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
batman-adv: make the GW selection class algorithm specific
The B.A.T.M.A.N. V algorithm uses a different metric compared to its
predecessor and for this reason the logic used to compute the best
Gateway is also changed. This means that the GW selection class
fed to this logic has a semantics that depends on the algorithm being
used.
Make the parsing and printing routine of the GW selection class
routing algorithm specific. Each algorithm can now parse (and print)
this value independently.
If no API is provided by any algorithm, the default is to use the
current mechanism of considering such value like an integer between
1 and 255.
Signed-off-by: Antonio Quartulli <a@unstable.cc> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Mon, 13 Jun 2016 05:41:32 +0000 (07:41 +0200)]
batman-adv: Avoid sysfs name collision for netns moves
The kobject_put is only removing the sysfs entry and corresponding entries
when its reference counter becomes zero. This tends to lead to collisions
when a device is moved between two different network namespaces because
some of the sysfs files have to be removed first and then added again to
the already moved sysfs entry.
WARNING: CPU: 0 PID: 290 at lib/kobject.c:240 kobject_add_internal+0x5ec/0x8a0
kobject_add_internal failed for batman_adv with -EEXIST, don't try to register things with the same name in the same directory.
But the caller of kobject_put can already remove the sysfs entry before it
does the kobject_put. This removal is done even when the reference counter
is not yet zero and thus avoids the problem.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Mon, 13 Jun 2016 05:41:31 +0000 (07:41 +0200)]
batman-adv: Revert "postpone sysfs removal when unregistering"
Postponing the removal of the interface breaks the expected behavior of
NETDEV_UNREGISTER and NETDEV_PRE_TYPE_CHANGE. This is especially
problematic when an interface is removed and added in quick succession.
This reverts commit 5bc44dc8458c ("batman-adv: postpone sysfs removal when
unregistering").
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
The legacy sysfs interface to modify interfaces belonging to batman-adv
is run inside a region holding s_lock. And to add a net_device, it has
to also get the rtnl_lock. This is exactly the other way around than in
other virtual net_devices and conflicts with netdevice notifier which
executes inside rtnl_lock.
The inverted lock situation is currently solved by executing the removal
of netdevices via workqueue. The workqueue isn't executed inside
rtnl_lock and thus can independently get the s_lock and the rtnl_lock.
But this workaround fails when the netdevice notifier creates events in
quick succession and the earlier triggered removal of a net_device isn't
processed in the workqueue before the adding of the new netdevice (with
same name) event is issued.
Instead the legacy sysfs interface store events have to be enqueued in
a workqueue to loose the s_lock. The worker is then free to get the
required locks and the deadlock is avoided.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Fri, 10 Jun 2016 21:00:56 +0000 (23:00 +0200)]
batman-adv: Use rtnl link in device creation example
The standard kernel API to add new virtual interfaces and attach other
interfaces to it is rtnl-link. batman-adv supports it since v3.10. This
functionality should be used instead of the legacy batman-adv-only sysfs
interface.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Fri, 10 Jun 2016 21:00:55 +0000 (23:00 +0200)]
batman-adv: Define module rtnl link name
The batman-adv module can automatically be loaded when operations over the
rtnl link are triggered. This requires only the correct rtnl link name in
the module header.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Sven Eckelmann [Tue, 7 Jun 2016 20:44:53 +0000 (22:44 +0200)]
batman-adv: Document optional batadv_algo_ops
Some operations in batadv_algo_ops are optional and marked as such in the
kerneldoc. But some of them miss the "(optional)" in their kerneldoc. These
have to also be marked to give an implementor of an algorithm the correct
background information without looking in the code calling these function
pointers.
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Xin Long [Sun, 7 Aug 2016 06:15:13 +0000 (14:15 +0800)]
sctp: use event->chunk when it's valid
Commit 52253db924d1 ("sctp: also point GSO head_skb to the sk when
it's available") used event->chunk->head_skb to get the head_skb in
sctp_ulpevent_set_owner().
But at that moment, the event->chunk was NULL, as it cloned the skb
in sctp_ulpevent_make_rcvmsg(). Therefore, that patch didn't really
work.
This patch is to move the event->chunk initialization before calling
sctp_ulpevent_receive_data() so that it uses event->chunk when it's
valid.
Fixes: 52253db924d1 ("sctp: also point GSO head_skb to the sk when it's available") Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
pravin shelar [Sat, 6 Aug 2016 00:45:37 +0000 (17:45 -0700)]
net: vxlan: lwt: Fix vxlan local traffic.
vxlan driver has bypass for local vxlan traffic, but that
depends on information about all VNIs on local system in
vxlan driver. This is not available in case of LWT.
Therefore following patch disable encap bypass for LWT
vxlan traffic.
Fixes: ee122c79d42 ("vxlan: Flow based tunneling"). Reported-by: Jakub Libosvar <jlibosva@redhat.com> Signed-off-by: Pravin B Shelar <pshelar@ovn.org> Acked-by: Jiri Benc <jbenc@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
pravin shelar [Sat, 6 Aug 2016 00:45:36 +0000 (17:45 -0700)]
net: vxlan: lwt: Use source ip address during route lookup.
LWT user can specify destination as well as source ip address
for given tunnel endpoint. But vxlan is ignoring given source
ip address. Following patch uses both ip address to route the
tunnel packet. This consistent with other LWT implementations,
like GENEVE and GRE.
Fixes: ee122c79d42 ("vxlan: Flow based tunneling"). Signed-off-by: Pravin B Shelar <pshelar@ovn.org> Acked-by: Jiri Benc <jbenc@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Daniel Borkmann [Thu, 4 Aug 2016 22:11:13 +0000 (00:11 +0200)]
bpf: fix checksum for vlan push/pop helper
When having skbs on ingress with CHECKSUM_COMPLETE, tc BPF programs don't
push rcsum of mac header back in and after BPF run back pull out again as
opposed to some other subsystems (ovs, for example).
For cases like q-in-q, meaning when a vlan tag for offloading is already
present and we're about to push another one, then skb_vlan_push() pushes the
inner one into the skb, increasing mac header and skb_postpush_rcsum()'ing
the 4 bytes vlan header diff. Likewise, for the reverse operation in
skb_vlan_pop() for the case where vlan header needs to be pulled out of the
skb, we're decreasing the mac header and skb_postpull_rcsum()'ing the 4 bytes
rcsum of the vlan header that was removed.
However mangling the rcsum here will lead to hw csum failure for BPF case,
since we're pulling or pushing data that was not part of the current rcsum.
Changing tc BPF programs in general to push/pull rcsum around BPF_PROG_RUN()
is also not really an option since current behaviour is ABI by now, but apart
from that would also mean to do quite a bit of useless work in the sense that
usually 12 bytes need to be rcsum pushed/pulled also when we don't need to
touch this vlan related corner case. One way to fix it would be to push the
necessary rcsum fixup down into vlan helpers that are (mostly) slow-path
anyway.
Fixes: 4e10df9a60d9 ("bpf: introduce bpf_skb_vlan_push/pop() helpers") Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Daniel Borkmann [Thu, 4 Aug 2016 22:11:12 +0000 (00:11 +0200)]
bpf: fix checksum fixups on bpf_skb_store_bytes
bpf_skb_store_bytes() invocations above L2 header need BPF_F_RECOMPUTE_CSUM
flag for updates, so that CHECKSUM_COMPLETE will be fixed up along the way.
Where we ran into an issue with bpf_skb_store_bytes() is when we did a
single-byte update on the IPv6 hoplimit despite using BPF_F_RECOMPUTE_CSUM
flag; simple ping via ICMPv6 triggered a hw csum failure as a result. The
underlying issue has been tracked down to a buffer alignment issue.
Meaning, that csum_partial() computations via skb_postpull_rcsum() and
skb_postpush_rcsum() pair invoked had a wrong result since they operated on
an odd address for the hoplimit, while other computations were done on an
even address. This mix doesn't work as-is with skb_postpull_rcsum(),
skb_postpush_rcsum() pair as it always expects at least half-word alignment
of input buffers, which is normally the case. Thus, instead of these helpers
using csum_sub() and (implicitly) csum_add(), we need to use csum_block_sub(),
csum_block_add(), respectively. For unaligned offsets, they rotate the sum
to align it to a half-word boundary again, otherwise they work the same as
csum_sub() and csum_add().
Adding __skb_postpull_rcsum(), __skb_postpush_rcsum() variants that take the
offset as an input and adapting bpf_skb_store_bytes() to them fixes the hw
csum failures again. The skb_postpull_rcsum(), skb_postpush_rcsum() helpers
use a 0 constant for offset so that the compiler optimizes the offset & 1
test away and generates the same code as with csum_sub()/_add().
Fixes: 608cd71a9c7c ("tc: bpf: generalize pedit action") Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Daniel Borkmann [Thu, 4 Aug 2016 22:11:11 +0000 (00:11 +0200)]
bpf: also call skb_postpush_rcsum on xmit occasions
Follow-up to commit f8ffad69c9f8 ("bpf: add skb_postpush_rcsum and fix
dev_forward_skb occasions") to fix an issue for dev_queue_xmit() redirect
locations which need CHECKSUM_COMPLETE fixups on ingress.
For the same reasons as described in f8ffad69c9f8 already, we of course
also need this here, since dev_queue_xmit() on a veth device will let us
end up in the dev_forward_skb() helper again to cross namespaces.
Latter then calls into skb_postpull_rcsum() to pull out L2 header, so
that netif_rx_internal() sees CHECKSUM_COMPLETE as it is expected. That
is, CHECKSUM_COMPLETE on ingress covering L2 _payload_, not L2 headers.
Also here we have to address bpf_redirect() and bpf_clone_redirect().
Fixes: 3896d655f4d4 ("bpf: introduce bpf_clone_redirect() helper") Fixes: 27b29f63058d ("bpf: add bpf_redirect() helper") Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
...leading to the following warning for !DEBUG builds:
drivers/net/ethernet/tundra/tsi108_eth.c:169:13: warning: 'dump_eth_one' defined but not used [-Wunused-function]
static void dump_eth_one(struct net_device *dev)
^
...when using the arch/powerpc/configs/mpc7448_hpc2_defconfig
Put the function definition under the same #ifdef as the call site
to avoid the warning.
Cc: "David S. Miller" <davem@davemloft.net> Cc: netdev@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Thu, 4 Aug 2016 14:36:22 +0000 (17:36 +0300)]
mlxsw: spectrum: Add missing DCB rollback in error path
We correctly execute mlxsw_sp_port_dcb_fini() when port is removed, but
I missed its rollback in the error path of port creation, so add it.
Fixes: f00817df2b42 ("mlxsw: spectrum: Introduce support for Data Center Bridging (DCB)") Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Thu, 4 Aug 2016 14:36:21 +0000 (17:36 +0300)]
mlxsw: spectrum: Do not override PAUSE settings
The PFCC register is used to configure both PAUSE and PFC frames.
Therefore, when PFC frames are disabled we must make sure we don't
mistakenly also disable PAUSE frames (which might be enabled).
Fix this by packing the PFCC register with the current PAUSE settings.
Note that this register is also accessed via ethtool ops, but there we
are guaranteed to have PFC disabled.
Fixes: d81a6bdb87ce ("mlxsw: spectrum: Add IEEE 802.1Qbb PFC support") Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Fixes: 1aa661f5c3df1 ("rhashtable-test: Measure time to insert, remove & traverse entries") Signed-off-by: Phil Sutter <phil@nwl.cc> Signed-off-by: David S. Miller <davem@davemloft.net>
Phil Sutter [Thu, 4 Aug 2016 10:11:57 +0000 (12:11 +0200)]
sctp_diag: Respect ss adding TCPF_CLOSE to idiag_states
Since 'ss' always adds TCPF_CLOSE to idiag_states flags, sctp_diag can't
rely upon TCPF_LISTEN flag solely being present when listening sockets
are requested.
Signed-off-by: Phil Sutter <phil@nwl.cc> Signed-off-by: David S. Miller <davem@davemloft.net>
Phil Sutter [Thu, 4 Aug 2016 10:11:56 +0000 (12:11 +0200)]
sctp_diag: Fix T3_rtx timer export
The asoc's timer value is not kept in asoc->timeouts array but in it's
primary transport instead.
Furthermore, we must export the timer only if it is pending, otherwise
the value will underrun when stored in an unsigned variable and
user space will only see a very large timeout value.
Signed-off-by: Phil Sutter <phil@nwl.cc> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sun, 7 Aug 2016 00:52:00 +0000 (20:52 -0400)]
Merge tag 'mac80211-for-davem-2016-08-05' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
Johannes Berg says:
====================
First set of fixes for the current cycle:
* fix 80+80 bandwidth warning
* fix powersave with mac80211 TXQ implementation
* use correct way to free SKBs from multicast buffering
* mesh: fix operation ordering to work with all drivers
* mesh: end service period even when peer goes away
* mesh: correct HT opmode validity checks
* pass hw pointer from mac80211 to driver in TPT method,
fixing a bug (in a bit the wrong way, but that's what
we have right now)
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
The introduction of pre-allocated hash elements inadvertently broke
the behavior of bpf hash maps where users expected to call
bpf_map_update_elem() without considering that the map can be full.
Some programs do:
old_value = bpf_map_lookup_elem(map, key);
if (old_value) {
... prepare new_value on stack ...
bpf_map_update_elem(map, key, new_value);
}
Before pre-alloc the update() for existing element would work even
in 'map full' condition. Restore this behavior.
The above program could have updated old_value in place instead of
update() which would be faster and most programs use that approach,
but sometimes the values are large and the programs use update()
helper to do atomic replacement of the element.
Note we cannot simply update element's value in-place like percpu
hash map does and have to allocate extra num_possible_cpu elements
and use this extra reserve when the map is full.
Fixes: 6c9059817432 ("bpf: pre-allocate hash map elements") Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
net: dsa: b53: Add missing ULL suffix for 64-bit constant
On 32-bit (e.g. with m68k-linux-gnu-gcc-4.1):
drivers/net/dsa/b53/b53_common.c: In function ‘b53_arl_read’:
drivers/net/dsa/b53/b53_common.c:1072: warning: integer constant is too large for ‘long’ type
Fixes: 1da6df85c6fbed8f ("net: dsa: b53: Implement ARL add/del/dump operations") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Dave Forster <dforster@brocade.com> Acked-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David Howells [Wed, 3 Aug 2016 13:11:40 +0000 (14:11 +0100)]
rxrpc: Fix races between skb free, ACK generation and replying
Inside the kafs filesystem it is possible to occasionally have a call
processed and terminated before we've had a chance to check whether we need
to clean up the rx queue for that call because afs_send_simple_reply() ends
the call when it is done, but this is done in a workqueue item that might
happen to run to completion before afs_deliver_to_call() completes.
Further, it is possible for rxrpc_kernel_send_data() to be called to send a
reply before the last request-phase data skb is released. The rxrpc skb
destructor is where the ACK processing is done and the call state is
advanced upon release of the last skb. ACK generation is also deferred to
a work item because it's possible that the skb destructor is not called in
a context where kernel_sendmsg() can be invoked.
To this end, the following changes are made:
(1) kernel_rxrpc_data_consumed() is added. This should be called whenever
an skb is emptied so as to crank the ACK and call states. This does
not release the skb, however. kernel_rxrpc_free_skb() must now be
called to achieve that. These together replace
rxrpc_kernel_data_delivered().
(2) kernel_rxrpc_data_consumed() is wrapped by afs_data_consumed().
This makes afs_deliver_to_call() easier to work as the skb can simply
be discarded unconditionally here without trying to work out what the
return value of the ->deliver() function means.
The ->deliver() functions can, via afs_data_complete(),
afs_transfer_reply() and afs_extract_data() mark that an skb has been
consumed (thereby cranking the state) without the need to
conditionally free the skb to make sure the state is correct on an
incoming call for when the call processor tries to send the reply.
(3) rxrpc_recvmsg() now has to call kernel_rxrpc_data_consumed() when it
has finished with a packet and MSG_PEEK isn't set.
(4) rxrpc_packet_destructor() no longer calls rxrpc_hard_ACK_data().
Because of this, we no longer need to clear the destructor and put the
call before we free the skb in cases where we don't want the ACK/call
state to be cranked.
(5) The ->deliver() call-type callbacks are made to return -EAGAIN rather
than 0 if they expect more data (afs_extract_data() returns -EAGAIN to
the delivery function already), and the caller is now responsible for
producing an abort if that was the last packet.
(6) There are many bits of unmarshalling code where:
ret = afs_extract_data(call, skb, last, ...);
switch (ret) {
case 0: break;
case -EAGAIN: return 0;
default: return ret;
}
is to be found. As -EAGAIN can now be passed back to the caller, we
now just return if ret < 0:
ret = afs_extract_data(call, skb, last, ...);
if (ret < 0)
return ret;
(7) Checks for trailing data and empty final data packets has been
consolidated as afs_data_complete(). So:
if (skb->len > 0)
return -EBADMSG;
if (!last)
return 0;
becomes:
ret = afs_data_complete(call, skb, last);
if (ret < 0)
return ret;
(8) afs_transfer_reply() now checks the amount of data it has against the
amount of data desired and the amount of data in the skb and returns
an error to induce an abort if we don't get exactly what we want.
Without these changes, the following oops can occasionally be observed,
particularly if some printks are inserted into the delivery path:
This doesn't have an immediate effect, but can mess up later
LL_RESERVED_SPACE calculations, such as done in
net/ipv6/mcast.c:mld_newpack. For reference, this issue was found
from a skb_panic raised there after the length calculations had given
the wrong result.
Note the other current users of this interface
(drivers/net/tun.c:tun_set_headroom and
drivers/net/veth.c:veth_set_rx_headroom) are both checking this
correctly thus need no modification.
Thanks to Ben for some pointers from the crash dumps!
Cc: Benjamin Poirier <bpoirier@suse.com> Cc: Paolo Abeni <pabeni@redhat.com>
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1361414 Signed-off-by: Ian Wienand <iwienand@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Maxim Altshul [Thu, 4 Aug 2016 12:43:04 +0000 (15:43 +0300)]
mac80211: Add ieee80211_hw pointer to get_expected_throughput
The variable is added to allow the driver an easy access to
it's own hw->priv when the op is invoked.
This fixes a crash in wlcore because it was relying on a
station pointer that wasn't initialized yet. It's the wrong
way to fix the crash, but it solves the problem for now and
it does make sense to have the hw pointer here.
Masashi Honma [Tue, 2 Aug 2016 08:16:57 +0000 (17:16 +0900)]
mac80211: End the MPSP even if EOSP frame was not acked
If QoS frame with EOSP (end of service period) subfield=1 sent by local
peer was not acked by remote peer, local peer did not end the MPSP. This
prevents local peer from going to DOZE state. And if the remote peer
goes away without closing connection, local peer continues AWAKE state
and wastes battery.
Signed-off-by: Masashi Honma <masashi.honma@gmail.com> Acked-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Felix Fietkau [Tue, 2 Aug 2016 09:13:41 +0000 (11:13 +0200)]
mac80211: fix purging multicast PS buffer queue
The code currently assumes that buffered multicast PS frames don't have
a pending ACK frame for tx status reporting.
However, hostapd sends a broadcast deauth frame on teardown for which tx
status is requested. This can lead to the "Have pending ack frames"
warning on module reload.
Fix this by using ieee80211_free_txskb/ieee80211_purge_tx_queue.
Cc: stable@vger.kernel.org Signed-off-by: Felix Fietkau <nbd@nbd.name> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Manish Chopra [Wed, 3 Aug 2016 08:02:02 +0000 (04:02 -0400)]
qlcnic: fix data structure corruption in async mbx command handling
This patch fixes a data structure corruption bug in the SRIOV VF mailbox
handler code. While handling mailbox commands from the atomic context,
driver is accessing and updating qlcnic_async_work_list_struct entry fields
in the async work list. These fields could be concurrently accessed by the
work function resulting in data corruption.
This patch restructures async mbx command handling by using a separate
async command list instead of using a list of work_struct structures.
A single work_struct is used to schedule and handle the async commands
with proper locking mechanism.
Signed-off-by: Rajesh Borundia <rajesh.borundia@qlogic.com> Signed-off-by: Sony Chacko <sony.chacko@qlogic.com> Signed-off-by: Manish Chopra <manish.chopra@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
tg3: Report the correct number of RSS queues through tg3_get_rxnfc
This patch remove the wrong substraction from info->data in
tg3_get_rxnfc function. Without this patch, the number of RSS
queues reported is less by one.
Reported-by: Michal Soltys <soltys@ziu.info> Signed-off-by: Siva Reddy Kallam <siva.kallam@broadcom.com> Signed-off-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
When the rx coalescing time is 0, interrupts
are not generated from the controller and rx path hangs.
To avoid this rx hang, updating the driver to not allow
rx coalescing time to be 0.
Signed-off-by: Satish Baddipadige <satish.baddipadige@broadcom.com> Signed-off-by: Siva Reddy Kallam <siva.kallam@broadcom.com> Signed-off-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
We need to get a UNKNOWN_VALUE with imm to force id
generation so lines 0-5 make r7 a valid packet pointer.
We then read two different bytes from the packet and
add them to copies of the constructed packet pointer.
r8 (line 9) and r9 (line 11) will get the same id of 1,
independently. When either of them is validated (line
13) - find_good_pkt_pointers() will also mark the other
as safe. This leads to access on line 14 being mistakenly
considered safe.
Fixes: 969bf05eb3ce ("bpf: direct packet access") Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Arnd Bergmann [Tue, 2 Aug 2016 10:23:29 +0000 (12:23 +0200)]
net: xgene: fix maybe-uninitialized variable
Building with -Wmaybe-uninitialized shows a potential use of
an uninitialized variable:
drivers/net/ethernet/apm/xgene/xgene_enet_hw.c: In function 'xgene_enet_phy_connect':
drivers/net/ethernet/apm/xgene/xgene_enet_hw.c:802:23: warning: 'phy_dev' may be used uninitialized in this function [-Wmaybe-uninitialized]
Although the compiler correctly identified this based on the function,
the current code is still safe as long dev->of_node is non-NULL
for the case of CONFIG_ACPI=n, which is currently the case.
The warning is now disabled by default, but still appears when
building with W=1, and other build test tools should be able to
detect it as well. Adding an #else clause here makes the code
more robust and makes it clear to the compiler that this cannot
happen.
Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: 8089a96f601b ("drivers: net: xgene: Add backward compatibility") Signed-off-by: David S. Miller <davem@davemloft.net>
Jarno Rajahalme [Tue, 2 Aug 2016 02:36:07 +0000 (19:36 -0700)]
openvswitch: Remove incorrect WARN_ONCE().
ovs_ct_find_existing() issues a warning if an existing conntrack entry
classified as IP_CT_NEW is found, with the premise that this should
not happen. However, a newly confirmed, non-expected conntrack entry
remains IP_CT_NEW as long as no reply direction traffic is seen. This
has resulted into somewhat confusing kernel log messages. This patch
removes this check and warning.
Fixes: 289f2253 ("openvswitch: Find existing conntrack entry after upcall.") Suggested-by: Joe Stringer <joe@ovn.org> Signed-off-by: Jarno Rajahalme <jarno@ovn.org> Acked-by: Joe Stringer <joe@ovn.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Wed, 3 Aug 2016 16:50:06 +0000 (12:50 -0400)]
Merge tag 'trace-v4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
"A few updates and fixes:
- move the suppressing of the __builtin_return_address >0 warning to
the tracing directory only.
- metag recordmcount fix for newer glibc's
- two tracing histogram fixes that were reported by KASAN"
* tag 'trace-v4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing: Fix use-after-free in hist_register_trigger()
tracing: Fix use-after-free in hist_unreg_all/hist_enable_unreg_all
Makefile: Mute warning for __builtin_return_address(>0) for tracing only
ftrace/recordmcount: Work around for addition of metag magic but not relocations
mac80211: mesh: flush stations before beacons are stopped
Some drivers (e.g. wl18xx) expect that the last stage in the
de-initialization process will be stopping the beacons, similar to AP flow.
Update ieee80211_stop_mesh() flow accordingly.
As peers can be removed dynamically, this would not impact other drivers.
Linus Torvalds [Tue, 2 Aug 2016 23:47:06 +0000 (19:47 -0400)]
Merge tag 'for-linus-v4.8' of git://github.com/martinbrandenburg/linux
Pull orangefs update from Martin Brandenburg:
"Kernel side caching and executable bugfix
This allows OrangeFS to utilize the dcache and adds an in kernel
attribute cache. We previously used the user side client for this
purpose.
We see a modest performance increase on small file operations. For
example, without the cache, compiling coreutils takes about 17
minutes. With the patch and a 50 millisecond timeout for
dcache_timeout_msecs and getattr_timeout_msecs (the default),
compiling coreutils takes about 6 minutes 20 seconds. On the same
hardware, compiling coreutils on an xfs filesystem takes 90 seconds.
We see similar improvements with mdtest and a test involving writing,
reading, and deleting a large number of small files.
Interested parties can review more data at the following URL.
The eventual goal of this is to allow getdents to turn into a
readdirplus to the OrangeFS server. The cache will be filled then,
which should provide a performance benefit to the common case of
readdir followed by getattr on each entry (i.e. ls -l).
This also fixes a bug. When orangefs_inode_permission was added, it
did not collect i_size from the OrangeFS server, since this presses an
unnecessary load on the OrangeFS server. However, it left a case
where i_size is never initialized. Then running an executable could
fail.
With this patch, size is always collected to be inserted into the
cache. Thus the bug disappears. If this patch is not accepted during
this merge window, we will send a one-line band-aid for this bug
instead"
* tag 'for-linus-v4.8' of git://github.com/martinbrandenburg/linux:
Orangefs: update orangefs.txt
orangefs: Account for jiffies wraparound.
orangefs: Change default dcache and getattr timeout to 50 msec.
orangefs: Allow dcache and getattr cache time to be configured.
orangefs: Cache getattr results.
orangefs: Use d_time to avoid excessive lookups