| Commit message (Collapse) | Author | Age | Files | Lines |
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The tc ct action does not cache the route in the flowtable entry.
Fixes: 88bf6e4114d5 ("netfilter: flowtable: add tunnel encap/decap action offload support")
Fixes: cfab6dbd0ecf ("netfilter: flowtable: add tunnel match offload support")
Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds nft_set_elem_expr_destroy() to destroy stateful
expressions in set elements.
This patch also updates the commit path to call this function to invoke
expr->ops->destroy_clone when required.
This is implicitly fixing up a module reference counter leak and
a memory leak in expressions that allocated internal state, e.g.
nft_counter.
Fixes: 409444522976 ("netfilter: nf_tables: add elements with stateful expressions")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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After copying the expression to the set element extension, release the
expression and reset the pointer to avoid a double-free from the error
path.
Fixes: 409444522976 ("netfilter: nf_tables: add elements with stateful expressions")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch allows users to specify the stateful expression for the
elements in this set via NFTA_SET_EXPR. This new feature allows you to
turn on counters for all of the elements in this set.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The patch that adds support for stateful expressions in set definitions
require this.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Move the nft_expr_clone() helper function to the core.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The previous patch allowed device drivers to publish their default
binding between packet trap policers and packet trap groups. However,
some users might not be content with this binding and would like to
change it.
In case user space passed a packet trap policer identifier when setting
a packet trap group, invoke the appropriate device driver callback and
pass the new policer identifier.
v2:
* Check for presence of 'DEVLINK_ATTR_TRAP_POLICER_ID' in
devlink_trap_group_set() and bail if not present
* Add extack error message in case trap group was partially modified
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Packet trap groups are used to aggregate logically related packet traps.
Currently, these groups allow user space to batch operations such as
setting the trap action of all member traps.
In order to prevent the CPU from being overwhelmed by too many trapped
packets, it is desirable to bind a packet trap policer to these groups.
For example, to limit all the packets that encountered an exception
during routing to 10Kpps.
Allow device drivers to bind default packet trap policers to packet trap
groups when the latter are registered with devlink.
The next patch will enable user space to change this default binding.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Devices capable of offloading the kernel's datapath and perform
functions such as bridging and routing must also be able to send (trap)
specific packets to the kernel (i.e., the CPU) for processing.
For example, a device acting as a multicast-aware bridge must be able to
trap IGMP membership reports to the kernel for processing by the bridge
module.
In most cases, the underlying device is capable of handling packet rates
that are several orders of magnitude higher compared to those that can
be handled by the CPU.
Therefore, in order to prevent the underlying device from overwhelming
the CPU, devices usually include packet trap policers that are able to
police the trapped packets to rates that can be handled by the CPU.
This patch allows capable device drivers to register their supported
packet trap policers with devlink. User space can then tune the
parameters of these policer (currently, rate and burst size) and read
from the device the number of packets that were dropped by the policer,
if supported.
Subsequent patches in the series will allow device drivers to create
default binding between these policers and packet trap groups and allow
user space to change the binding.
v2:
* Add 'strict_start_type' in devlink policy
* Have device drivers provide max/min rate/burst size for each policer.
Use them to check validity of user provided parameters
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next
Johan Hedberg says:
====================
pull request: bluetooth-next 2020-03-29
Here are a few more Bluetooth patches for the 5.7 kernel:
- Fix assumption of encryption key size when reading fails
- Add support for DEFER_SETUP with L2CAP Enhanced Credit Based Mode
- Fix issue with auto-connected devices
- Fix suspend handling when entering the state fails
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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This uses the DEFER_SETUP flag to group channels with
L2CAP_CREDIT_BASED_CONNECTION_REQ.
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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With this change, the encryption key size is not assumed to be 16 if the
read_encryption_key_size command fails for any reason. This ensures
that if the controller fails the command for any reason that the
encryption key size isn't implicitely set to 16 and instead take a more
concervative posture to assume it is 0.
Signed-off-by: Alain Michaud <alainm@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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This adds a callback to read the socket pid.
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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When handling auto-connected devices, we should execute the rest of the
connection complete when it was previously discovered and it is an ACL
connection.
Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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If Bluetooth fails to enter the suspended state correctly, restore the
state to running (re-enabling scans). PM_POST_SUSPEND is only sent to
notifiers that successfully return from PM_PREPARE_SUSPEND notification
so we should recover gracefully if it fails.
Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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The approach taken to pass the port policer methods on to drivers is
pragmatic. It is similar to the port mirroring implementation (in that
the DSA core does all of the filter block interaction and only passes
simple operations for the driver to implement) and dissimilar to how
flow-based policers are going to be implemented (where the driver has
full control over the flow_cls_offload data structure).
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Make room for other actions for the matchall filter by keeping the
mirred argument parsing self-contained in its own function.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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On low memory system, run time dumps can consume too much memory. Add
administrator ability to disable auto dumps per reporter as part of the
error flow handle routine.
This attribute is not relevant while executing
DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET.
By default, auto dump is activated for any reporter that has a dump method,
as part of the reporter registration to devlink.
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When health reporter is registered to devlink, devlink will implicitly set
auto recover if and only if the reporter has a recover method. No reason
to explicitly get the auto recover flag from the driver.
Remove this flag from all drivers that called
devlink_health_reporter_create.
All existing health reporters set auto recovery to true if they have a
recover method.
Yet, administrator can unset auto recover via netlink command as prior to
this patch.
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The rest of the devlink code sets the extack message using
NL_SET_ERR_MSG_MOD. Change the existing appearances of NL_SET_ERR_MSG
to NL_SET_ERR_MSG_MOD.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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It may be up to the driver (in case ANY HW stats is passed) to select
which type of HW stats he is going to use. Add an infrastructure to
expose this information to user.
$ tc filter add dev enp3s0np1 ingress proto ip handle 1 pref 1 flower dst_ip 192.168.1.1 action drop
$ tc -s filter show dev enp3s0np1 ingress
filter protocol ip pref 1 flower chain 0
filter protocol ip pref 1 flower chain 0 handle 0x1
eth_type ipv4
dst_ip 192.168.1.1
in_hw in_hw_count 2
action order 1: gact action drop
random type none pass val 0
index 1 ref 1 bind 1 installed 10 sec used 10 sec
Action statistics:
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
used_hw_stats immediate <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Introduce a helper to pass value and selector to. The helper packs them
into struct and puts them into netlink message.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next
Steffen Klassert says:
====================
pull request (net-next): ipsec-next 2020-03-28
1) Use kmem_cache_zalloc() instead of kmem_cache_alloc()
in xfrm_state_alloc(). From Huang Zijiang.
2) esp_output_fill_trailer() is the same in IPv4 and IPv6,
so share this function to avoide code duplcation.
From Raed Salem.
3) Add offload support for esp beet mode.
From Xin Long.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Like __xfrm_transport/mode_tunnel_prep(), this patch is to add
__xfrm_mode_beet_prep() to fix the transport_header for gso
segments, and reset skb mac_len, and pull skb data to the
proto inside esp.
This patch also fixes a panic, reported by ltp:
# modprobe esp4_offload
# runltp -f net_stress.ipsec_tcp
[ 2452.780511] kernel BUG at net/core/skbuff.c:109!
[ 2452.799851] Call Trace:
[ 2452.800298] <IRQ>
[ 2452.800705] skb_push.cold.98+0x14/0x20
[ 2452.801396] esp_xmit+0x17b/0x270 [esp4_offload]
[ 2452.802799] validate_xmit_xfrm+0x22f/0x2e0
[ 2452.804285] __dev_queue_xmit+0x589/0x910
[ 2452.806264] __neigh_update+0x3d7/0xa50
[ 2452.806958] arp_process+0x259/0x810
[ 2452.807589] arp_rcv+0x18a/0x1c
It was caused by the skb going to esp_xmit with a wrong transport
header.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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Similar to xfrm6_tunnel/transport_gso_segment(), _gso_segment()
is added to do gso_segment for esp6 beet mode. Before calling
inet6_offloads[proto]->callbacks.gso_segment, it needs to do:
- Get the upper proto from ph header to get its gso_segment
when xo->proto is IPPROTO_BEETPH.
- Add SKB_GSO_TCPV6 to gso_type if x->sel.family != AF_INET6
and the proto == IPPROTO_TCP, so that the current tcp ipv6
packet can be segmented.
- Calculate a right value for skb->transport_header and move
skb->data to the transport header position.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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Similar to xfrm4_tunnel/transport_gso_segment(), _gso_segment()
is added to do gso_segment for esp4 beet mode. Before calling
inet_offloads[proto]->callbacks.gso_segment, it needs to do:
- Get the upper proto from ph header to get its gso_segment
when xo->proto is IPPROTO_BEETPH.
- Add SKB_GSO_TCPV4 to gso_type if x->sel.family == AF_INET6
and the proto == IPPROTO_TCP, so that the current tcp ipv4
packet can be segmented.
- Calculate a right value for skb->transport_header and move
skb->data to the transport header position.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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The esp fill trailer method is identical for both
IPv6 and IPv4.
Share the implementation for esp6 and esp to avoid
code duplication in addition it could be also used
at various drivers code.
Signed-off-by: Raed Salem <raeds@mellanox.com>
Reviewed-by: Boris Pismenny <borisp@mellanox.com>
Reviewed-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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Use kmem_cache_zalloc instead of manually setting kmem_cache_alloc
with flag GFP_ZERO since kzalloc sets allocated memory
to zero.
Change in v2:
add indation
Signed-off-by: Huang Zijiang <huang.zijiang@zte.com.cn>
Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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There is no point in preparing the module name in a buffer. The format
string can be passed diectly to 'request_module()'.
This axes a few lines of code and cleans a few things:
- max len for a driver name is MODULE_NAME_LEN wich is ~ 60 chars,
not 128. It would be down-sized in 'request_module()'
- we should pass the total size of the buffer to 'snprintf()', not the
size minus 1
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Implement TSINFO_GET request to get timestamping information for a network
device. This is traditionally available via ETHTOOL_GET_TS_INFO ioctl
request.
Move part of ethtool_get_ts_info() into common.c so that ioctl and netlink
code use the same logic to get timestamping information from the device.
v3: use "TSINFO" rather than "TIMESTAMP", suggested by Richard Cochran
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add three string sets related to timestamping information:
ETH_SS_SOF_TIMESTAMPING: SOF_TIMESTAMPING_* flags
ETH_SS_TS_TX_TYPES: timestamping Tx types
ETH_SS_TS_RX_FILTERS: timestamping Rx filters
These will be used for TIMESTAMP_GET request.
v2: avoid compiler warning ("enumeration value not handled in switch")
in net_hwtstamp_validate()
v3: omit dash in Tx type names ("one-step-*" -> "onestep-*"), suggested by
Richard Cochran
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Send ETHTOOL_MSG_EEE_NTF notification whenever EEE settings of a network
device are modified using ETHTOOL_MSG_EEE_SET netlink message or
ETHTOOL_SEEE ioctl request.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Implement EEE_SET netlink request to set EEE settings of a network device.
These are traditionally set with ETHTOOL_SEEE ioctl request.
The netlink interface allows setting the EEE status for all link modes
supported by kernel but only first 32 link modes can be set at the moment
as only those are supported by the ethtool_ops callback.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Implement EEE_GET request to get EEE settings of a network device. These
are traditionally available via ETHTOOL_GEEE ioctl request.
The netlink interface allows reporting EEE status for all link modes
supported by kernel but only first 32 link modes are provided at the moment
as only those are reported by the ethtool_ops callback and drivers.
v2: fix alignment (whitespace only)
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Send ETHTOOL_MSG_PAUSE_NTF notification whenever pause parameters of
a network device are modified using ETHTOOL_MSG_PAUSE_SET netlink message
or ETHTOOL_SPAUSEPARAM ioctl request.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Implement PAUSE_SET netlink request to set pause parameters of a network
device. Thease are traditionally set with ETHTOOL_SPAUSEPARAM ioctl
request.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Implement PAUSE_GET request to get pause parameters of a network device.
These are traditionally available via ETHTOOL_GPAUSEPARAM ioctl request.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Send ETHTOOL_MSG_COALESCE_NTF notification whenever coalescing parameters
of a network device are modified using ETHTOOL_MSG_COALESCE_SET netlink
message or ETHTOOL_SCOALESCE ioctl request.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Implement COALESCE_SET netlink request to set coalescing parameters of
a network device. These are traditionally set with ETHTOOL_SCOALESCE ioctl
request. This commit adds only support for device coalescing parameters,
not per queue coalescing parameters.
Like the ioctl implementation, the generic ethtool code checks if only
supported parameters are modified; if not, first offending attribute is
reported using extack.
v2: fix alignment (whitespace only)
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Implement COALESCE_GET request to get coalescing parameters of a network
device. These are traditionally available via ETHTOOL_GCOALESCE ioctl
request. This commit adds only support for device coalescing parameters,
not per queue coalescing parameters.
Omit attributes with zero values unless they are declared as supported
(i.e. the corresponding bit in ethtool_ops::supported_coalesce_params is
set).
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Andrew noticed that some handlers for *_SET commands leak a netdev
reference if required ethtool_ops callbacks do not exist. One of them is
ethnl_set_privflags(), a simple reproducer would be e.g.
ip link add veth1 type veth peer name veth2
ethtool --set-priv-flags veth1 foo on
ip link del veth1
Make sure dev_put() is called when ethtool_ops check fails.
Fixes: f265d799596a ("ethtool: set device private flags with PRIVFLAGS_SET request")
Reported-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch adds functionality to configure routes for RPL source routing
functionality. There is no IPIP functionality yet implemented which can
be added later when the cases when to use IPv6 encapuslation comes more
clear.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The build_state callback of lwtunnel doesn't contain the net namespace
structure yet. This patch will add it so we can check on specific
address configuration at creation time of rpl source routes.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch adds rpl source routing receive handling. Everything works
only if sysconf "rpl_seg_enabled" and source routing is enabled. Mostly
the same behaviour as IPv6 segmentation routing. To handle compression
and uncompression a rpl.c file is created which contains the necessary
functionality. The receive handling will also care about IPv6
encapsulated so far it's specified as possible nexthdr in RFC 6554.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch adds a functionality to addrconf to check on a specific RPL
address configuration. According to RFC 6554:
To detect loops in the SRH, a router MUST determine if the SRH
includes multiple addresses assigned to any interface on that
router. If such addresses appear more than once and are separated by
at least one address not assigned to that router.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Expose a new netlink family to userspace to control the PM, setting:
- list of local addresses to be signalled.
- list of local addresses used to created subflows.
- maximum number of add_addr option to react
When the msk is fully established, the PM netlink attempts to
announce the 'signal' list via the ADD_ADDR option. Since we
currently lack the ADD_ADDR echo (and related event) only the
first addr is sent.
After exhausting the 'announce' list, the PM tries to create
subflow for each addr in 'local' list, waiting for each
connection to be completed before attempting the next one.
Idea is to add an additional PM hook for ADD_ADDR echo, to allow
the PM netlink announcing multiple addresses, in sequence.
Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Exported via same /proc file as the Linux TCP MIB counters, so "netstat -s"
or "nstat" will show them automatically.
The MPTCP MIB counters are allocated in a distinct pcpu area in order to
avoid bloating/wasting TCP pcpu memory.
Counters are allocated once the first MPTCP socket is created in a
network namespace and free'd on exit.
If no sockets have been allocated, all-zero mptcp counters are shown.
The MIB counter list is taken from the multipath-tcp.org kernel, but
only a few counters have been picked up so far. The counter list can
be increased at any time later on.
v2 -> v3:
- remove 'inline' in foo.c files (David S. Miller)
Co-developed-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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add ulp-specific diagnostic functions, so that subflow information can be
dumped to userspace programs like 'ss'.
v2 -> v3:
- uapi: use bit macros appropriate for userspace
Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Co-developed-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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On timeout event, schedule a work queue to do the retransmission.
Retransmission code closely resembles the sendmsg() implementation and
re-uses mptcp_sendmsg_frag, providing a dummy msghdr - for flags'
sake - and peeking the relevant dfrag from the rtx head.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This will simplify mptcp-level retransmission implementation
in the next patch. If dfrag is provided by the caller, skip
kernel space memory allocation and use data and metadata
provided by the dfrag itself.
Because a peer could ack data at TCP level but refrain from
sending mptcp-level ACKs, we could grow the mptcp socket
backlog indefinitely.
We should thus block mptcp_sendmsg until the peer has acked some of the
sent data.
In order to be able to do so, increment the mptcp socket wmem_queued
counter on memory allocation and decrement it when releasing the memory
on mptcp-level ack reception.
Because TCP performns sndbuf auto-tuning up to tcp_wmem_max[2], make
this the mptcp sk_sndbuf limit.
In the future we could add experiment with autotuning as TCP does in
tcp_sndbuf_expand().
v2 -> v3:
- remove 'inline' in foo.c files (David S. Miller)
Co-developed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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