David S. Miller [Thu, 22 Mar 2018 18:44:11 +0000 (14:44 -0400)]
Merge branch 'tipc-diag'
GhantaKrishnamurthy MohanKrishna says:
====================
tipc: socket diagnostics additions for AF_TIPC
The following patchsets add socket diagnostics support for AF_TIPC by
using the sock diag framework. The patchset was created on top of
commit id:
fb66cb0.
New iproute2 package is needed to use this functionality which will
be sent for review in a seperate mail.
The commit series improves diagnosis of tipc sockets by exporting the
configuration, states and statistics of sockets.
The series has been co-authored by Parthasarathy Bhuvaragan and
consist of two parts:
1-2: Adaptations of existing code to support sock_diag framework.
We modify existing functions to support socket diagnostics. Required
information about the sockets are exported.
3: Step sk_drops during packet drop.
This occurs if the packet cannot be queued due to queue length exceeding
configured thresholds.
The diag module is optional, and if enabled it will be loaded on demand
when needed.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
GhantaKrishnamurthy MohanKrishna [Wed, 21 Mar 2018 13:37:45 +0000 (14:37 +0100)]
tipc: step sk->sk_drops when rcv buffer is full
Currently when tipc is unable to queue a received message on a
socket, the message is rejected back to the sender with error
TIPC_ERR_OVERLOAD. However, the application on this socket
has no knowledge about these discards.
In this commit, we try to step the sk_drops counter when tipc
is unable to queue a received message. Export sk_drops
using tipc socket diagnostics.
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: GhantaKrishnamurthy MohanKrishna <mohan.krishna.ghanta.krishnamurthy@ericsson.com>
Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
GhantaKrishnamurthy MohanKrishna [Wed, 21 Mar 2018 13:37:44 +0000 (14:37 +0100)]
tipc: implement socket diagnostics for AF_TIPC
This commit adds socket diagnostics capability for AF_TIPC in netlink
family NETLINK_SOCK_DIAG in a new kernel module (diag.ko).
The following are key design considerations:
- config TIPC_DIAG has default y, like INET_DIAG.
- only requests with flag NLM_F_DUMP is supported (dump all).
- tipc_sock_diag_req message is introduced to send filter parameters.
- the response attributes are of TLV, some nested.
To avoid exposing data structures between diag and tipc modules and
avoid code duplication, the following additions are required:
- export tipc_nl_sk_walk function to reuse socket iterator.
- export tipc_sk_fill_sock_diag to fill the tipc diag attributes.
- create a sock_diag response message in __tipc_add_sock_diag defined
in diag.c and use the above exported tipc_sk_fill_sock_diag
to fill response.
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: GhantaKrishnamurthy MohanKrishna <mohan.krishna.ghanta.krishnamurthy@ericsson.com>
Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
GhantaKrishnamurthy MohanKrishna [Wed, 21 Mar 2018 13:37:43 +0000 (14:37 +0100)]
tipc: modify socket iterator for sock_diag
The current socket iterator function tipc_nl_sk_dump, handles socket
locks and calls __tipc_nl_add_sk for each socket.
To reuse this logic in sock_diag implementation, we do minor
modifications to make these functions generic as described below.
In this commit, we add a two new functions __tipc_nl_sk_walk,
__tipc_nl_add_sk_info and modify tipc_nl_sk_dump, __tipc_nl_add_sk
accordingly.
In __tipc_nl_sk_walk we:
1. acquire and release socket locks
2. for each socket, execute the specified callback function
In __tipc_nl_add_sk we:
- Move the netlink attribute insertion to __tipc_nl_add_sk_info.
tipc_nl_sk_dump calls tipc_nl_sk_walk with __tipc_nl_add_sk as argument.
sock_diag will use these generic functions in a later commit.
There is no functional change in this commit.
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: GhantaKrishnamurthy MohanKrishna <mohan.krishna.ghanta.krishnamurthy@ericsson.com>
Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Thu, 22 Mar 2018 17:13:37 +0000 (13:13 -0400)]
Merge branch 'mlxsw-Update-supported-firmware-version'
Ido Schimmel says:
====================
mlxsw: Update supported firmware version
The first patch bumps the firmware version supported by the driver. The
second patch enables a feature introduced in the new version,
auto-negotiation disable.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Tal Bar [Wed, 21 Mar 2018 07:34:06 +0000 (09:34 +0200)]
mlxsw: spectrum: Add support for auto-negotiation disable mode
In 'auto-neg off' the device have sent AN (auto-negotiation) frames
with the forced speed. Thus, fix it using an_disable_admin field in
Port type and speed (PTYS) register. This field indicates if speed
negotiation frames would be send by the port or not.
Add the field and enable/disable it for 'auto-neg on/off', make the
port to start/stop sending AN (auto-negotiation) frames. Note that for
SwitchX2 the behavior doesn't change (i.e support only AN enabled with
forced speed).
Signed-off-by: Tal Bar <talb@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Tal Bar [Wed, 21 Mar 2018 07:34:05 +0000 (09:34 +0200)]
mlxsw: spectrum: Update the supported firmware to version 13.1620.192
This new firmware contains:
- Support for auto-neg disable mode
Signed-off-by: Tal Bar <talb@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Thu, 22 Mar 2018 17:12:03 +0000 (13:12 -0400)]
Merge branch 'fix-some-bugs-for-HNS3-driver'
Peng Li says:
====================
fix some bugs for HNS3 driver
This patchset fixes some bugs for HNS3 driver:
[Patch 1/11 - 5/11] fix various bugs reported by hisilicon test team.
[Patch 6/11 - 7/11] fix bugs about interrupt coalescing self-adaptive
function.
[Patch 8/11 - 11/11] fix bugs about ethtool_ops.get_link_ksettings.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Fuyun Liang [Wed, 21 Mar 2018 07:49:30 +0000 (15:49 +0800)]
net: hns3: fix for not returning problem in get_link_ksettings when phy exists
When phy exists, phy_ethtool_ksettings_get function is enough to get the
link ksettings. If the phy exists, get_link_ksettings function can return
directly after phy_ethtool_ksettings_get is called.
Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fuyun Liang [Wed, 21 Mar 2018 07:49:29 +0000 (15:49 +0800)]
net: hns3: add querying speed and duplex support to VF
This patch adds support for querying speed and duplex by ethtool ethX
to VF.
Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fuyun Liang [Wed, 21 Mar 2018 07:49:28 +0000 (15:49 +0800)]
net: hns3: add get_link support to VF
This patch adds ethtool_ops.get_link support to VF.
Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fuyun Liang [Wed, 21 Mar 2018 07:49:27 +0000 (15:49 +0800)]
net: hns3: fix for getting wrong link mode problem
Fixed link mode is returned by hns3_get_link_ksettings. It is
unreasonable.
This patch fixes it by adding some related functions to get link
mode from hardware.
Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fuyun Liang [Wed, 21 Mar 2018 07:49:26 +0000 (15:49 +0800)]
net: hns3: change the time interval of int_gl calculating
Since we change the update rate of int_gl from every interrupt to every
one hundred interrupts, the old way to get time interval by int_gl value
is not accurate. This patch calculates the time interval using the jiffies
value.
Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fuyun Liang [Wed, 21 Mar 2018 07:49:25 +0000 (15:49 +0800)]
net: hns3: change GL update rate
The interrupt coalescing self-adaptive function updates the int_gl every
interrupt. The GL update rate is too faster to get a better new GL value.
This patch changes the GL update rate to every one hundred interrupts.
The GL update rate is defined by HNS3_INT_ADAPT_DOWN_START.
Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Peng Li [Wed, 21 Mar 2018 07:49:24 +0000 (15:49 +0800)]
net: hns3: increase the max time for IMP handle command
It may need more time for IMP handle some command, such as reset.
This patch enlarges the max time for cmd timeout.
Driver will check the IMP result every us, it may break through the
loop when get the right result. So not all command need the max time.
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Yunsheng Lin [Wed, 21 Mar 2018 07:49:23 +0000 (15:49 +0800)]
net: hns3: export pci table of hclge and hclgevf to userspace
There is no module that is dependent on hclge or hclgevf's symbol,
but hns_enet need them to provide ops for it to run. When there is
a need to auto load the hns3 driver, the auto load will fail because
hclge or hclgevf is not loaded.
Hns_enet has already exported the pci table, so this patch exports
the pci table for hclge and hclgevf module too.
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Yunsheng Lin [Wed, 21 Mar 2018 07:49:22 +0000 (15:49 +0800)]
net: hns3: fix for vlan table lost problem when resetting
The vlan table in hardware is clear after PF/Core/IMP/Global
reset, which will cause vlan tagged packets not being received
problem.
This patch fixes it by restoring the vlan table after reset.
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Peng Li [Wed, 21 Mar 2018 07:49:21 +0000 (15:49 +0800)]
net: hns3: fix the VF queue reset flow error
VF queue reset flow is different from PF queue reset flow.
VF driver should stop VF queue first, then send message to PF
and PF do the reset. PF should send a response to VF after
PF complete the queue reset, VF can initialize the queue hw
after get the response.
This patch fixes the VF queue reset flow as the correct step.
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fuyun Liang [Wed, 21 Mar 2018 07:49:20 +0000 (15:49 +0800)]
net: hns3: reallocate tx/rx buffer after changing mtu
When changing the mtu, the max frame size also will be changed. The tx
buffer size and the rx buffer size to be allocated are determined by max
frame size. So when max frame size is changed, the tx buffer and rx buffer
need to be reallocated.
When the tc_num is changed, the tx buffer and rx buffer need to be
reallocated too. So calling set_mtu and buffer_alloc separately is better.
Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David Ahern [Wed, 21 Mar 2018 02:31:14 +0000 (19:31 -0700)]
devlink: Remove top_hierarchy arg to devlink_resource_register
top_hierarchy arg can be determined by comparing parent_resource_id to
DEVLINK_RESOURCE_ID_PARENT_TOP so it does not need to be a separate
argument.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David Ahern [Tue, 20 Mar 2018 17:04:30 +0000 (10:04 -0700)]
selftests: Add multipath tests for onlink flag
Add multipath tests for onlink flag: one test with onlink added to
both nexthops, then tests with onlink added to only 1 nexthop.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Thu, 22 Mar 2018 15:59:12 +0000 (11:59 -0400)]
Merge branch 'cxgb4-rdma'
Raju Rangoju says:
====================
Add support for RDMA enhancements in cxgb4
Allocates the HW-resources and provide the necessary routines for the
upper layer driver (rdma/iw_cxgb4) to enable the RDMA SRQ support for
Chelsio adapters.
Advertise support for write with immediate work request
Advertise support for write with completion
v3: modified memory allocation as per Stefano's suggestion
v2: fixed the patching issues and also
fixed the following based on review comments of Stefano Brivio
- using kvzalloc instead of vzalloc
- using #define instead of enum
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Raju Rangoju [Tue, 20 Mar 2018 10:11:42 +0000 (15:41 +0530)]
cxgb4: Support firmware rdma write completion work request.
If FW supports RDMA WRITE_COMPLETION functionality, then advertise that
to the ULDs. This will be used by iw_cxgb4 to allow WRITE_COMPLETION
work requests.
Signed-off-by: Potnuri Bharat Teja <bharat@chelsio.com>
Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Raju Rangoju [Tue, 20 Mar 2018 10:11:41 +0000 (15:41 +0530)]
cxgb4: Support firmware rdma write with immediate work request.
If FW supports RDMA WRITE_WITH_IMMEDATE functionality, then advertise
that
to the ULDs. This will be used by iw_cxgb4 to allow WRITE_WITH_IMMEDIATE
work requests.
Signed-off-by: Potnuri Bharat Teja <bharat@chelsio.com>
Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Raju Rangoju [Tue, 20 Mar 2018 10:11:40 +0000 (15:41 +0530)]
cxgb4: Add support to query HW SRQ parameters
This patch adds support to query FW for the HW SRQ table start/end, and
advertise that for ULDs.
Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Raju Rangoju [Tue, 20 Mar 2018 10:11:39 +0000 (15:41 +0530)]
cxgb4: Add support to initialise/read SRQ entries
- This patch adds support to initialise srq table and read srq entries
Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Raju Rangoju [Tue, 20 Mar 2018 10:11:38 +0000 (15:41 +0530)]
cxgb4: Adds CPL support for Shared Receive Queues
- Add srq table query cpl support for srq
- Add cpl_abort_req_rss6 and cpl_abort_rpl_rss6 structs.
- Add accessors, macros to get the SRQ IDX value.
Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Thu, 22 Mar 2018 15:47:53 +0000 (11:47 -0400)]
Merge branch 'r8169-small-improvements'
Heiner Kallweit says:
====================
r8169: series with smaller improvements w/o functional changes
This series includes smaller improvements w/o intended functional changes.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Heiner Kallweit [Tue, 20 Mar 2018 06:45:42 +0000 (07:45 +0100)]
r8169: add helper tp_to_dev
In several places struct device is referenced by using &tp->pci_dev->dev.
Add helper tp_to_dev() to improve code readability.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Heiner Kallweit [Tue, 20 Mar 2018 06:45:40 +0000 (07:45 +0100)]
r8169: change type of argument in rtl_disable/enable_clock_request
Changing the argument type to struct rtl8169_private * is more in line
with the other functions in the driver and it allows to reduce the code size.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Heiner Kallweit [Tue, 20 Mar 2018 06:45:35 +0000 (07:45 +0100)]
r8169: change type of first argument in rtl_tx_performance_tweak
Changing the type of the first argument to struct rtl8169_private * is more
in line with the other functions in the driver and it allows to reduce the
code size.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Heiner Kallweit [Tue, 20 Mar 2018 06:45:33 +0000 (07:45 +0100)]
r8169: simplify rtl_set_mac_address
Replace open-coded functionality with eth_mac_addr().
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Thu, 22 Mar 2018 15:28:54 +0000 (11:28 -0400)]
Merge tag 'batadv-next-for-davem-
20180319' of git://git.open-mesh.org/linux-merge
Simon Wunderlich says:
====================
This feature/cleanup patchset includes the following patches:
- avoid redundant multicast TT entries, by Linus Luessing
- add netlink support for distributed arp table cache and multicast flags,
by Linus Luessing (2 patches)
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Sowmini Varadhan [Mon, 19 Mar 2018 13:52:48 +0000 (06:52 -0700)]
rds: tcp: remove register_netdevice_notifier infrastructure.
The netns deletion path does not need to wait for all net_devices
to be unregistered before dismantling rds_tcp state for the netns
(we are able to dismantle this state on module unload even when
all net_devices are active so there is no dependency here).
This patch removes code related to netdevice notifiers and
refactors all the code needed to dismantle rds_tcp state
into a ->exit callback for the pernet_operations used with
register_pernet_device().
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Reviewed-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Christian Brauner [Mon, 19 Mar 2018 12:17:31 +0000 (13:17 +0100)]
netns: send uevent messages
This patch adds a receive method to NETLINK_KOBJECT_UEVENT netlink sockets
to allow sending uevent messages into the network namespace the socket
belongs to.
Currently non-initial network namespaces are already isolated and don't
receive uevents. There are a number of cases where it is beneficial for a
sufficiently privileged userspace process to send a uevent into a network
namespace.
One such use case would be debugging and fuzzing of a piece of software
which listens and reacts to uevents. By running a copy of that software
inside a network namespace, specific uevents could then be presented to it.
More concretely, this would allow for easy testing of udevd/ueventd.
This will also allow some piece of software to run components inside a
separate network namespace and then effectively filter what that software
can receive. Some examples of software that do directly listen to uevents
and that we have in the past attempted to run inside a network namespace
are rbd (CEPH client) or the X server.
Implementation:
The implementation has been kept as simple as possible from the kernel's
perspective. Specifically, a simple input method uevent_net_rcv() is added
to NETLINK_KOBJECT_UEVENT sockets which completely reuses existing
af_netlink infrastructure and does neither add an additional netlink family
nor requires any user-visible changes.
For example, by using netlink_rcv_skb() we can make use of existing netlink
infrastructure to report back informative error messages to userspace.
Furthermore, this implementation does not introduce any overhead for
existing uevent generating codepaths. The struct netns got a new uevent
socket member that records the uevent socket associated with that network
namespace including its position in the uevent socket list. Since we record
the uevent socket for each network namespace in struct net we don't have to
walk the whole uevent socket list. Instead we can directly retrieve the
relevant uevent socket and send the message. At exit time we can now also
trivially remove the uevent socket from the uevent socket list. This keeps
the codepath very performant without introducing needless overhead and even
makes older codepaths faster.
Uevent sequence numbers are kept global. When a uevent message is sent to
another network namespace the implementation will simply increment the
global uevent sequence number and append it to the received uevent. This
has the advantage that the kernel will never need to parse the received
uevent message to replace any existing uevent sequence numbers. Instead it
is up to the userspace process to remove any existing uevent sequence
numbers in case the uevent message to be sent contains any.
Security:
In order for a caller to send uevent messages to a target network namespace
the caller must have CAP_SYS_ADMIN in the owning user namespace of the
target network namespace. Additionally, any received uevent message is
verified to not exceed size UEVENT_BUFFER_SIZE. This includes the space
needed to append the uevent sequence number.
Testing:
This patch has been tested and verified to work with the following udev
implementations:
1. CentOS 6 with udevd version 147
2. Debian Sid with systemd-udevd version 237
3. Android 7.1.1 with ueventd
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Christian Brauner [Mon, 19 Mar 2018 12:17:30 +0000 (13:17 +0100)]
net: add uevent socket member
This commit adds struct uevent_sock to struct net. Since struct uevent_sock
records the position of the uevent socket in the uevent socket list we can
trivially remove it from the uevent socket list during cleanup. This speeds
up the old removal codepath.
Note, list_del() will hit __list_del_entry_valid() in its call chain which
will validate that the element is a member of the list. If it isn't it will
take care that the list is not modified.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Kirill Tkhai [Mon, 19 Mar 2018 11:45:46 +0000 (14:45 +0300)]
net: Convert nf_ct_net_ops
These pernet_operations register and unregister sysctl.
Also, there is inet_frags_exit_net() called in exit method,
which has to be safe after
a560002437d3 "net: Fix hlist
corruptions in inet_evict_bucket()".
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Kirill Tkhai [Mon, 19 Mar 2018 11:45:37 +0000 (14:45 +0300)]
net: Convert lowpan_frags_ops
These pernet_operations register and unregister sysctl.
Also, there is inet_frags_exit_net() called in exit method,
which has to be safe after
a560002437d3 "net: Fix hlist
corruptions in inet_evict_bucket()".
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Kirill Tkhai [Mon, 19 Mar 2018 11:39:05 +0000 (14:39 +0300)]
net: Convert can_pernet_ops
These pernet_operations create and destroy /proc entries
and cancel per-net timer.
Also, there are unneed iterations over empty list of net
devices, since all net devices must be already moved
to init_net or unregistered by default_device_ops. This
already was mentioned here:
https://marc.info/?l=linux-can&m=
150169589119335&w=2
So, it looks safe to make them async.
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Wed, 21 Mar 2018 16:08:01 +0000 (12:08 -0400)]
Merge git://git./linux/kernel/git/bpf/bpf-next
Daniel Borkmann says:
====================
pull-request: bpf-next 2018-03-21
The following pull-request contains BPF updates for your *net-next* tree.
The main changes are:
1) Add a BPF hook for sendmsg and sendfile by reusing the ULP infrastructure
and sockmap. Three helpers are added along with this, bpf_msg_apply_bytes(),
bpf_msg_cork_bytes(), and bpf_msg_pull_data(). The first is used to tell
for how many bytes the verdict should be applied to, the second to tell
that x bytes need to be queued first to retrigger the BPF program for a
verdict, and the third helper is mainly for the sendfile case to pull in
data for making it private for reading and/or writing, from John.
2) Improve address to symbol resolution of user stack traces in BPF stackmap.
Currently, the latter stores the address for each entry in the call trace,
however to map these addresses to user space files, it is necessary to
maintain the mapping from these virtual addresses to symbols in the binary
which is not practical for system-wide profiling. Instead, this option for
the stackmap rather stores the ELF build id and offset for the call trace
entries, from Song.
3) Add support that allows BPF programs attached to perf events to read the
address values recorded with the perf events. They are requested through
PERF_SAMPLE_ADDR via perf_event_open(). Main motivation behind it is to
support building memory or lock access profiling and tracing tools with
the help of BPF, from Teng.
4) Several improvements to the tools/bpf/ Makefiles. The 'make bpf' in the
tools directory does not provide the standard quiet output except for
bpftool and it also does not respect specifying a build output directory.
'make bpf_install' command neither respects specified destination nor
prefix, all from Jiri. In addition, Jakub fixes several other minor issues
in the Makefiles on top of that, e.g. fixing dependency paths, phony
targets and more.
5) Various doc updates e.g. add a comment for BPF fs about reserved names
to make the dentry lookup from there a bit more obvious, and a comment
to the bpf_devel_QA file in order to explain the diff between native
and bpf target clang usage with regards to pointer size, from Quentin
and Daniel.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Daniel Borkmann [Mon, 19 Mar 2018 23:21:15 +0000 (00:21 +0100)]
bpf, doc: add description wrt native/bpf clang target and pointer size
As this recently came up on netdev [0], lets add it to the BPF devel doc.
[0] https://www.spinics.net/lists/netdev/msg489612.html
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
David S. Miller [Tue, 20 Mar 2018 16:29:58 +0000 (12:29 -0400)]
Merge branch 'dsa-mv88e6xxx-some-fixes'
Uwe Kleine-König says:
====================
net: dsa: mv88e6xxx: some fixes
these patches target net-next and got approved by Andrew Lunn.
Compared to (implicit) v1, I dropped the patch that I didn't know if it
was right because of missing documentation on my side. But Andrew
already cared for that in a patch that is now
adfccf118211 in net-next.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Uwe Kleine-König [Tue, 20 Mar 2018 09:44:42 +0000 (10:44 +0100)]
net: dsa: mv88e6xxx: Fix interrupt name for g2 irq
This changes the respective line in /proc/interrupts from
49: x x mv88e6xxx-g1 7 Edge mv88e6xxx-g1
to
49: x x mv88e6xxx-g1 7 Edge mv88e6xxx-g2
which makes more sense.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Uwe Kleine-König [Tue, 20 Mar 2018 09:44:41 +0000 (10:44 +0100)]
net: dsa: mv88e6xxx: Fix typo in a comment
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Uwe Kleine-König [Tue, 20 Mar 2018 09:44:40 +0000 (10:44 +0100)]
net: dsa: mv88e6xxx: Fix name of switch
88E6141
The switch name is emitted in the kernel log, so having the right name
there is nice.
Fixes: 1558727a1c1b ("net: dsa: mv88e6xxx: Add support for ethernet switch 88E6141")
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Tue, 20 Mar 2018 16:11:03 +0000 (12:11 -0400)]
Merge branch 'mlxsw-Adapt-driver-to-upcoming-firmware-versions'
Ido Schimmel says:
====================
mlxsw: Adapt driver to upcoming firmware versions
The first two patches make sure that reserved fields are set to zero, as
required by the device's programmer's reference manual (PRM).
Last two patches prevent the driver from performing an invalid operation
that is going to be denied by upcoming firmware versions.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Mon, 19 Mar 2018 07:51:03 +0000 (09:51 +0200)]
mlxsw: spectrum_acl: Do not invalidate already invalid ACL groups
When a new ACL group is created its region (ACL) list is initially
empty. Thus, the call to mlxsw_sp_acl_tcam_group_update() would
basically invalidate an already invalid (non-existent) group.
Remove the unnecessary call and make the function symmetric to its del()
counterpart.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Mon, 19 Mar 2018 07:51:02 +0000 (09:51 +0200)]
mlxsw: spectrum_acl: Adapt ACL configuration to new firmware versions
The driver currently creates empty ACL groups, binds them to the
requested port and then fills them with actual ACLs that point to TCAM
regions.
However, empty ACL groups are considered invalid and upcoming firmware
versions are going to forbid their binding.
Work around this limitation by only performing the binding after the
first ACL was added to the group.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Tal Bar [Mon, 19 Mar 2018 07:51:01 +0000 (09:51 +0200)]
mlxsw: spectrum: Reserved field in mbox profile shouldn't be set
There is no need to set some of the fields within 'mbox_config_profile',
since they are reserved and capability mask should be set to zero.
Signed-off-by: Tal Bar <talb@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Shalom Toledo [Mon, 19 Mar 2018 07:51:00 +0000 (09:51 +0200)]
mlxsw: pci: Set mbox dma addresses to zero when not used
Some of the opcodes don't use in, out or both mboxes. In such cases, the
mbox address is a reserved field and FW expects it to be zero.
Signed-off-by: Shalom Toledo <shalomt@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Matthew Wilcox [Thu, 15 Mar 2018 02:57:24 +0000 (19:57 -0700)]
mlx5: Remove call to ida_pre_get
The mlx5 driver calls ida_pre_get() in a loop for no readily apparent
reason. The driver uses ida_simple_get() which will call ida_pre_get()
by itself and there's no need to use ida_pre_get() unless using
ida_get_new().
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Daniel Borkmann [Mon, 19 Mar 2018 20:14:42 +0000 (21:14 +0100)]
Merge branch 'bpf-sockmap-ulp'
John Fastabend says:
====================
This series adds a BPF hook for sendmsg and senfile by using
the ULP infrastructure and sockmap. A simple pseudocode example
would be,
// load the programs
bpf_prog_load(SOCKMAP_TCP_MSG_PROG, BPF_PROG_TYPE_SK_MSG,
&obj, &msg_prog);
// lookup the sockmap
bpf_map_msg = bpf_object__find_map_by_name(obj, "my_sock_map");
// get fd for sockmap
map_fd_msg = bpf_map__fd(bpf_map_msg);
// attach program to sockmap
bpf_prog_attach(msg_prog, map_fd_msg, BPF_SK_MSG_VERDICT, 0);
// Add a socket 'fd' to sockmap at location 'i'
bpf_map_update_elem(map_fd_msg, &i, fd, BPF_ANY);
After the above snippet any socket attached to the map would run
msg_prog on sendmsg and sendfile system calls.
Three additional helpers are added bpf_msg_apply_bytes(),
bpf_msg_cork_bytes(), and bpf_msg_pull_data(). With
bpf_msg_apply_bytes BPF programs can tell the infrastructure how
many bytes the given verdict should apply to. This has two cases.
First, a BPF program applies verdict to fewer bytes than in the
current sendmsg/sendfile msg this will apply the verdict to the
first N bytes of the message then run the BPF program again with
data pointers recalculated to the N+1 byte. The second case is the
BPF program applies a verdict to more bytes than the current sendmsg
or sendfile system call. In this case the infrastructure will cache
the verdict and apply it to future sendmsg/sendfile calls until the
byte limit is reached. This avoids the overhead of running BPF
programs on large payloads.
The helper bpf_msg_cork_bytes() handles a different case where
a BPF program can not reach a verdict on a msg until it receives
more bytes AND the program doesn't want to forward the packet
until it is known to be "good". The example case being a user
(albeit a dumb one probably) sends a N byte header in 1B system
calls. The BPF program can call bpf_msg_cork_bytes with the
required byte limit to reach a verdict and then the program will
only be called again once N bytes are received.
The last helper added in this series is bpf_msg_pull_data(). It
is used to pull data in for modification or reading. Similar to
how sk_pull_data() works msg_pull_data can be used to access data
not in the initial (data_start, data_end) range. For sendpage()
calls this is needed if any data is accessed because the BPF
sendpage hook initializes the data_start and data_end pointers to
zero. We do this because sendpage data is shared with the user
and can be modified during or after the BPF verdict possibly
invalidating any verdict the BPF program decides. For sendmsg
the data is already copied by the sendmsg bpf infrastructure so
we only copy the data if the user request a data range that is
not already linearized. This happens if the user requests larger
blocks of data that are not in a single scatterlist element. The
common case seems to be accessing headers which normally are
in the first scatterlist element and already linearized.
For more examples please review the sample program. There are
examples for all the actions and helpers there.
Patches 1-8 implement the above sockmap/BPF infrastructure. The
remaining patches flush out some minimal selftests and the sample
sockmap program. The sockmap sample program is the main vehicle
for testing this infrastructure and will be moved into selftests
shortly. The final patch in this series is a simple shell script
to run a set of tests. These are the tests I run after any changes
to sockmap. The next task on the list after this series is to
push those into selftests so we can avoid manually testing.
Couple notes on future items in the pipeline,
0. move sample sockmap programs into selftests (noted above)
1. add additional support for tcp flags, most are ignored now.
2. add a Documentation/bpf/sockmap file with these details
3. support stacked ULP types to allow this and ktls to cooperate
4. Ingress flag support, redirect only supports egress here. The
other redirect helpers support ingress and egress flags.
5. add optimizations, I cut a few optimizations here in the
first iteration of the code for later study/implementation
-v3 updates
: u32 data pointers in msg_md changed to void *
: page_address NULL check and flag verification in msg_pull_data
: remove old note in commit msg that is no longer relevant
: remove enum sk_msg_action its not used anywhere
: fixup test_verifier W -> DW insn to account for data pointers
: unintentionally dropped a smap_stop_tx() call in sockmap.c
I propagated the ACKs forward because above changes were small
one/two line changes.
-v2 updates (discussion):
Dave noticed that sendpage call was previously (in v1) running
on the data directly. This allowed users to potentially modify
the data after or during the BPF program. However doing a copy
automatically even if the data is not accessed has measurable
performance impact. So we added another helper modeled after
the existing skb_pull_data() helper to allow users to selectively
pull data from the msg. This is also useful in the sendmsg case
when users need to access data outside the first scatterlist
element or across scatterlist boundaries.
While doing this I also unified the sendmsg and sendfile handlers
a bit. Originally the sendfile call was optimized for never
touching the data. I've decided for a first submission to drop
this optimization and we can add it back later. It introduced
unnecessary complexity, at least for a first posting, for a
use case I have not entirely flushed out yet. When the use
case is deployed we can add it back if needed. Then we can
review concrete performance deltas as well on real-world
use-cases/applications.
Lastly, I reorganized the patches a bit. Now all sockmap
changes are in a single patch and each helper gets its own
patch. This, at least IMO, makes it easier to review because
sockmap changes are not spread across the patch series. On
the other hand now apply_bytes, cork_bytes logic is only
activated later in the series. But that should be OK.
====================
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sun, 18 Mar 2018 19:58:17 +0000 (12:58 -0700)]
bpf: sockmap test script
This adds the test script I am currently using to validate
the latest sockmap changes. Shortly sockmap will be ported
to selftests and these will be run from the infrastructure
there. Until then add the script here so we have a coverage
checklist when porting into selftests.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sun, 18 Mar 2018 19:58:12 +0000 (12:58 -0700)]
bpf: sockmap sample test for bpf_msg_pull_data
This adds an option to test the msg_pull_data helper. This
uses two options txmsg_start and txmsg_end to let the user
specify start and end bytes to pull.
The options can be used with txmsg_apply, txmsg_cork options
as well as with any of the basic tests, txmsg, txmsg_redir and
txmsg_drop (plus noisy variants) to run pull_data inline with
those tests. By giving user direct control over the variables
we can easily do negative testing as well as positive tests.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sun, 18 Mar 2018 19:58:07 +0000 (12:58 -0700)]
bpf: sockmap add SK_DROP tests
Add tests for SK_DROP.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sun, 18 Mar 2018 19:58:02 +0000 (12:58 -0700)]
bpf: sockmap sample support for bpf_msg_cork_bytes()
Add sample application support for the bpf_msg_cork_bytes helper. This
lets the user specify how many bytes each verdict should apply to.
Similar to apply_bytes() tests these can be run as a stand-alone test
when used without other options or inline with other tests by using
the txmsg_cork option along with any of the basic tests txmsg,
txmsg_redir, txmsg_drop.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sun, 18 Mar 2018 19:57:56 +0000 (12:57 -0700)]
bpf: sockmap, add sample option to test apply_bytes helper
This adds an option to test the apply_bytes helper. This option lets
the user specify an int on the command line specifying how much data
each verdict should apply to.
When this is set a map entry is set with the bytes input by the user
and then the specified program --txmsg or --txmsg_redir will use the
value and set the applied data. If no other option is set then a
default --txmsg_apply program is run. This program will drop pkts
if an error is detected on the bytes map lookup. Useful to verify
the map lookup and apply helper are working and causing a hard
error if it is not.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sun, 18 Mar 2018 19:57:51 +0000 (12:57 -0700)]
bpf: sockmap sample, add data verification option
To verify data is not being dropped or corrupted this adds an option
to verify test-patterns on recv.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sun, 18 Mar 2018 19:57:46 +0000 (12:57 -0700)]
bpf: sockmap sample, add sendfile test
To exercise TX ULP sendpage implementation we need a test that does
a sendfile. Add sendfile test option here.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sun, 18 Mar 2018 19:57:41 +0000 (12:57 -0700)]
bpf: sockmap sample, add option to attach SK_MSG program
Add sockmap option to use SK_MSG program types.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sun, 18 Mar 2018 19:57:36 +0000 (12:57 -0700)]
bpf: add verifier tests for BPF_PROG_TYPE_SK_MSG
Test read and writes for BPF_PROG_TYPE_SK_MSG.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sun, 18 Mar 2018 19:57:31 +0000 (12:57 -0700)]
bpf: add map tests for BPF_PROG_TYPE_SK_MSG
Add map tests to attach BPF_PROG_TYPE_SK_MSG types to a sockmap.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sun, 18 Mar 2018 19:57:25 +0000 (12:57 -0700)]
bpf: sk_msg program helper bpf_sk_msg_pull_data
Currently, if a bpf sk msg program is run the program
can only parse data that the (start,end) pointers already
consumed. For sendmsg hooks this is likely the first
scatterlist element. For sendpage this will be the range
(0,0) because the data is shared with userspace and by
default we want to avoid allowing userspace to modify
data while (or after) BPF verdict is being decided.
To support pulling in additional bytes for parsing use
a new helper bpf_sk_msg_pull(start, end, flags) which
works similar to cls tc logic. This helper will attempt
to point the data start pointer at 'start' bytes offest
into msg and data end pointer at 'end' bytes offset into
message.
After basic sanity checks to ensure 'start' <= 'end' and
'end' <= msg_length there are a few cases we need to
handle.
First the sendmsg hook has already copied the data from
userspace and has exclusive access to it. Therefor, it
is not necessesary to copy the data. However, it may
be required. After finding the scatterlist element with
'start' offset byte in it there are two cases. One the
range (start,end) is entirely contained in the sg element
and is already linear. All that is needed is to update the
data pointers, no allocate/copy is needed. The other case
is (start, end) crosses sg element boundaries. In this
case we allocate a block of size 'end - start' and copy
the data to linearize it.
Next sendpage hook has not copied any data in initial
state so that data pointers are (0,0). In this case we
handle it similar to the above sendmsg case except the
allocation/copy must always happen. Then when sending
the data we have possibly three memory regions that
need to be sent, (0, start - 1), (start, end), and
(end + 1, msg_length). This is required to ensure any
writes by the BPF program are correctly transmitted.
Lastly this operation will invalidate any previous
data checks so BPF programs will have to revalidate
pointers after making this BPF call.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sun, 18 Mar 2018 19:57:20 +0000 (12:57 -0700)]
bpf: sockmap, add msg_cork_bytes() helper
In the case where we need a specific number of bytes before a
verdict can be assigned, even if the data spans multiple sendmsg
or sendfile calls. The BPF program may use msg_cork_bytes().
The extreme case is a user can call sendmsg repeatedly with
1-byte msg segments. Obviously, this is bad for performance but
is still valid. If the BPF program needs N bytes to validate
a header it can use msg_cork_bytes to specify N bytes and the
BPF program will not be called again until N bytes have been
accumulated. The infrastructure will attempt to coalesce data
if possible so in many cases (most my use cases at least) the
data will be in a single scatterlist element with data pointers
pointing to start/end of the element. However, this is dependent
on available memory so is not guaranteed. So BPF programs must
validate data pointer ranges, but this is the case anyways to
convince the verifier the accesses are valid.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sun, 18 Mar 2018 19:57:15 +0000 (12:57 -0700)]
bpf: sockmap, add bpf_msg_apply_bytes() helper
A single sendmsg or sendfile system call can contain multiple logical
messages that a BPF program may want to read and apply a verdict. But,
without an apply_bytes helper any verdict on the data applies to all
bytes in the sendmsg/sendfile. Alternatively, a BPF program may only
care to read the first N bytes of a msg. If the payload is large say
MB or even GB setting up and calling the BPF program repeatedly for
all bytes, even though the verdict is already known, creates
unnecessary overhead.
To allow BPF programs to control how many bytes a given verdict
applies to we implement a bpf_msg_apply_bytes() helper. When called
from within a BPF program this sets a counter, internal to the
BPF infrastructure, that applies the last verdict to the next N
bytes. If the N is smaller than the current data being processed
from a sendmsg/sendfile call, the first N bytes will be sent and
the BPF program will be re-run with start_data pointing to the N+1
byte. If N is larger than the current data being processed the
BPF verdict will be applied to multiple sendmsg/sendfile calls
until N bytes are consumed.
Note1 if a socket closes with apply_bytes counter non-zero this
is not a problem because data is not being buffered for N bytes
and is sent as its received.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sun, 18 Mar 2018 19:57:10 +0000 (12:57 -0700)]
bpf: create tcp_bpf_ulp allowing BPF to monitor socket TX/RX data
This implements a BPF ULP layer to allow policy enforcement and
monitoring at the socket layer. In order to support this a new
program type BPF_PROG_TYPE_SK_MSG is used to run the policy at
the sendmsg/sendpage hook. To attach the policy to sockets a
sockmap is used with a new program attach type BPF_SK_MSG_VERDICT.
Similar to previous sockmap usages when a sock is added to a
sockmap, via a map update, if the map contains a BPF_SK_MSG_VERDICT
program type attached then the BPF ULP layer is created on the
socket and the attached BPF_PROG_TYPE_SK_MSG program is run for
every msg in sendmsg case and page/offset in sendpage case.
BPF_PROG_TYPE_SK_MSG Semantics/API:
BPF_PROG_TYPE_SK_MSG supports only two return codes SK_PASS and
SK_DROP. Returning SK_DROP free's the copied data in the sendmsg
case and in the sendpage case leaves the data untouched. Both cases
return -EACESS to the user. Returning SK_PASS will allow the msg to
be sent.
In the sendmsg case data is copied into kernel space buffers before
running the BPF program. The kernel space buffers are stored in a
scatterlist object where each element is a kernel memory buffer.
Some effort is made to coalesce data from the sendmsg call here.
For example a sendmsg call with many one byte iov entries will
likely be pushed into a single entry. The BPF program is run with
data pointers (start/end) pointing to the first sg element.
In the sendpage case data is not copied. We opt not to copy the
data by default here, because the BPF infrastructure does not
know what bytes will be needed nor when they will be needed. So
copying all bytes may be wasteful. Because of this the initial
start/end data pointers are (0,0). Meaning no data can be read or
written. This avoids reading data that may be modified by the
user. A new helper is added later in this series if reading and
writing the data is needed. The helper call will do a copy by
default so that the page is exclusively owned by the BPF call.
The verdict from the BPF_PROG_TYPE_SK_MSG applies to the entire msg
in the sendmsg() case and the entire page/offset in the sendpage case.
This avoids ambiguity on how to handle mixed return codes in the
sendmsg case. Again a helper is added later in the series if
a verdict needs to apply to multiple system calls and/or only
a subpart of the currently being processed message.
The helper msg_redirect_map() can be used to select the socket to
send the data on. This is used similar to existing redirect use
cases. This allows policy to redirect msgs.
Pseudo code simple example:
The basic logic to attach a program to a socket is as follows,
// load the programs
bpf_prog_load(SOCKMAP_TCP_MSG_PROG, BPF_PROG_TYPE_SK_MSG,
&obj, &msg_prog);
// lookup the sockmap
bpf_map_msg = bpf_object__find_map_by_name(obj, "my_sock_map");
// get fd for sockmap
map_fd_msg = bpf_map__fd(bpf_map_msg);
// attach program to sockmap
bpf_prog_attach(msg_prog, map_fd_msg, BPF_SK_MSG_VERDICT, 0);
Adding sockets to the map is done in the normal way,
// Add a socket 'fd' to sockmap at location 'i'
bpf_map_update_elem(map_fd_msg, &i, fd, BPF_ANY);
After the above any socket attached to "my_sock_map", in this case
'fd', will run the BPF msg verdict program (msg_prog) on every
sendmsg and sendpage system call.
For a complete example see BPF selftests or sockmap samples.
Implementation notes:
It seemed the simplest, to me at least, to use a refcnt to ensure
psock is not lost across the sendmsg copy into the sg, the bpf program
running on the data in sg_data, and the final pass to the TCP stack.
Some performance testing may show a better method to do this and avoid
the refcnt cost, but for now use the simpler method.
Another item that will come after basic support is in place is
supporting MSG_MORE flag. At the moment we call sendpages even if
the MSG_MORE flag is set. An enhancement would be to collect the
pages into a larger scatterlist and pass down the stack. Notice that
bpf_tcp_sendmsg() could support this with some additional state saved
across sendmsg calls. I built the code to support this without having
to do refactoring work. Other features TBD include ZEROCOPY and the
TCP_RECV_QUEUE/TCP_NO_QUEUE support. This will follow initial series
shortly.
Future work could improve size limits on the scatterlist rings used
here. Currently, we use MAX_SKB_FRAGS simply because this was being
used already in the TLS case. Future work could extend the kernel sk
APIs to tune this depending on workload. This is a trade-off
between memory usage and throughput performance.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sun, 18 Mar 2018 19:57:05 +0000 (12:57 -0700)]
net: generalize sk_alloc_sg to work with scatterlist rings
The current implementation of sk_alloc_sg expects scatterlist to always
start at entry 0 and complete at entry MAX_SKB_FRAGS.
Future patches will want to support starting at arbitrary offset into
scatterlist so add an additional sg_start parameters and then default
to the current values in TLS code paths.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sun, 18 Mar 2018 19:57:00 +0000 (12:57 -0700)]
net: do_tcp_sendpages flag to avoid SKBTX_SHARED_FRAG
When calling do_tcp_sendpages() from in kernel and we know the data
has no references from user side we can omit SKBTX_SHARED_FRAG flag.
This patch adds an internal flag, NO_SKBTX_SHARED_FRAG that can be used
to omit setting SKBTX_SHARED_FRAG.
The flag is not exposed to userspace because the sendpage call from
the splice logic masks out all bits except MSG_MORE.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sun, 18 Mar 2018 19:56:54 +0000 (12:56 -0700)]
sockmap: convert refcnt to an atomic refcnt
The sockmap refcnt up until now has been wrapped in the
sk_callback_lock(). So its not actually needed any locking of its
own. The counter itself tracks the lifetime of the psock object.
Sockets in a sockmap have a lifetime that is independent of the
map they are part of. This is possible because a single socket may
be in multiple maps. When this happens we can only release the
psock data associated with the socket when the refcnt reaches
zero. There are three possible delete sock reference decrement
paths first through the normal sockmap process, the user deletes
the socket from the map. Second the map is removed and all sockets
in the map are removed, delete path is similar to case 1. The third
case is an asyncronous socket event such as a closing the socket. The
last case handles removing sockets that are no longer available.
For completeness, although inc does not pose any problems in this
patch series, the inc case only happens when a psock is added to a
map.
Next we plan to add another socket prog type to handle policy and
monitoring on the TX path. When we do this however we will need to
keep a reference count open across the sendmsg/sendpage call and
holding the sk_callback_lock() here (on every send) seems less than
ideal, also it may sleep in cases where we hit memory pressure.
Instead of dealing with these issues in some clever way simply make
the reference counting a refcnt_t type and do proper atomic ops.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sun, 18 Mar 2018 19:56:49 +0000 (12:56 -0700)]
sock: make static tls function alloc_sg generic sock helper
The TLS ULP module builds scatterlists from a sock using
page_frag_refill(). This is going to be useful for other ULPs
so move it into sock file for more general use.
In the process remove useless goto at end of while loop.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
David S. Miller [Mon, 19 Mar 2018 19:12:03 +0000 (15:12 -0400)]
Merge branch '40GbE' of git://git./linux/kernel/git/jkirsher/next-queue
Jeff Kirsher says:
====================
40GbE Intel Wired LAN Driver Updates 2018-03-19
This series contains updates to i40e and i40evf only.
Alex fixes a potential deadlock in the configure_clsflower function in
i40evf, where we exit with the "IN_CRITICAL_TASK" bit set while
notifying the PF of flower filters.
Jan fixed an issue where it was possible to set a mode that is not
allowed which resulted in link being down, so fixed the parity between
i40e_set_link_ksettings() and i40e_get_link_ksettings().
Patryk fixes a bug where a backplane device was allowing the setting of
link settings, which is not allowed.
Shiraz fixes a crash when entering S3 because the client interface was
freeing the MSIx vectors while they are still in use.
Jake fixes up a function header comment to document a newly added
parameter. Also cleaned up flags that were never used.
Doug fixes the incorrect return type for i40e_aq_add_cloud_filters().
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Paweł Jabłoński [Mon, 19 Mar 2018 16:28:04 +0000 (09:28 -0700)]
i40e: Fix the polling mechanism of GLGEN_RSTAT.DEVSTATE
This fixes the polling mechanism of GLGEN_RSTAT.DEVSTATE in the
PF Reset path when Global Reset is in progress. While the driver
is polling for the end of the PF Reset and the Global Reset is
triggered, abandon the PF Reset path and prepare for the
upcoming Global Reset.
Signed-off-by: Paweł Jabłoński <pawel.jablonski@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Jacob Keller [Mon, 19 Mar 2018 16:28:04 +0000 (09:28 -0700)]
i40evf: remove flags that are never used
These flags were defined, but there is no use within the driver code, so
we don't need to keep them.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Patryk Małek [Mon, 19 Mar 2018 16:28:04 +0000 (09:28 -0700)]
i40e: Prevent setting link speed on I40E_DEV_ID_25G_B
Setting link settings on backplane devices shouldn't be allowed.
This patch adds one more device id to the list which we check
that against.
Signed-off-by: Patryk Małek <patryk.malek@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Doug Dziggel [Mon, 19 Mar 2018 16:28:04 +0000 (09:28 -0700)]
i40e: Fix incorrect return types
Fix return types from i40e_status to enum i40e_status_code.
Signed-off-by: Doug Dziggel <douglas.a.dziggel@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Jacob Keller [Mon, 19 Mar 2018 16:28:04 +0000 (09:28 -0700)]
i40e: add doxygen comment for new mode parameter
A recent patch updated the signature for i40e_aq_set_switch_config() to
add a new parameter 'mode'. It forgot to document the parameter in the
doxygen function header comment. Add the parameter to the function
description now.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Shiraz Saleem [Mon, 19 Mar 2018 16:28:03 +0000 (09:28 -0700)]
i40e: Close client on suspend and restore client MSIx on resume
During suspend client MSIx vectors are freed while they are still
in use causing a crash on entering S3.
Fix this calling client close before freeing up its MSIx vectors.
Also update the client MSIx vectors on resume before client
open is called.
Fixes commit
b980c0634fe5 ("i40e: shutdown all IRQs and disable MSI-X
when suspended")
Reported-by: Stefan Assmann <sassmann@redhat.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Patryk Małek [Mon, 19 Mar 2018 16:28:03 +0000 (09:28 -0700)]
i40e: Prevent setting link speed on KX_X722
Setting link settings on backplane devices shouldn't be allowed.
This patch adds one more device id to the list which we check
that against.
Signed-off-by: Patryk Małek <patryk.malek@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Jan Sokolowski [Mon, 19 Mar 2018 16:28:03 +0000 (09:28 -0700)]
i40e: Properly check allowed advertisement capabilities
The i40e_set_link_ksettings and i40e_get_link_ksettings use different
codepaths to check available and supported advertisement modes. This
creates scenarios where it's possible to set a mode that's not allowed,
resulting in a link down.
Fix setting advertisement in i40e_set_link_ksettings by calling
i40e_get_link_ksettings to check what modes are allowed.
Signed-off-by: Jan Sokolowski <jan.sokolowski@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Alexander Duyck [Mon, 19 Mar 2018 16:28:03 +0000 (09:28 -0700)]
i40evf: Reorder configure_clsflower to avoid deadlock on error
While doing some code review I noticed that we can get into a state where
we exit with the "IN_CRITICAL_TASK" bit set while notifying the PF of
flower filters. This patch is meant to address that plus tweak the ordering
of the while loop waiting on it slightly so that we don't wait an extra
period after we have failed for the last time.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Stefano Brivio [Sun, 18 Mar 2018 20:58:12 +0000 (21:58 +0100)]
selftests: pmtu: Drop prints to kernel log from pmtu_vti6_link_change_mtu
Reported-by: David Ahern <dsahern@gmail.com>
Fixes: 1fad59ea1c34 ("selftests: pmtu: Add pmtu_vti6_link_change_mtu test")
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sun, 18 Mar 2018 20:52:59 +0000 (16:52 -0400)]
Merge branch 'mv88e6xxx-auto-phy-intr'
Andrew Lunn says:
====================
Automatic PHY interrupts
Now that the mv88e6xxx driver either installs in interrupt handler, or
polls for interrupts, it is possible to always handle PHY interrupts,
rather than have phylib perform the polling. This speeds up detection
of link changes and reduces the load on the MDIO bus, which is
beneficial for PTP.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Andrew Lunn [Sat, 17 Mar 2018 19:32:05 +0000 (20:32 +0100)]
net: dsa: mv88e6xxx: Add MDIO interrupts for internal PHYs
When registering an MDIO bus, it is possible to pass an array of
interrupts, one per address on the bus. phylib will then associate the
interrupt to the PHY device, if no other interrupt is provided.
Some of the global2 interrupts are PHY interrupts. Place them into the
MDIO bus structure.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Andrew Lunn [Sat, 17 Mar 2018 19:32:04 +0000 (20:32 +0100)]
net: dsa: mv88e6xxx: Add number of internal PHYs
Add to the info structure the number of internal PHYs, if they generate
interrupts. Some of the older generations of switches have internal
PHYs, but no interrupt registers. In this case, set the count to zero.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Andrew Lunn [Sat, 17 Mar 2018 19:32:03 +0000 (20:32 +0100)]
net: dsa: mv88e6xxx: Add missing g1 IRQ numbers
With the recent change to polling for interrupts, it is important that
the number of global 1 interrupts is listed. Without it, the driver
requests an interrupt domain for zero interrupts, which returns
EINVAL, and the probe fails.
Add two missing entries.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Florian Fainelli [Sun, 18 Mar 2018 18:23:05 +0000 (11:23 -0700)]
net: dsa: mv88e6xxx: Fix missing register lock in serdes_get_stats
We can hit the register lock not held assertion with the following path:
[ 34.170631] mv88e6085 0.1:00: Switch registers lock not held!
[ 34.176510] CPU: 0 PID: 950 Comm: ethtool Not tainted 4.16.0-rc4 #143
[ 34.182985] Hardware name: Freescale Vybrid VF5xx/VF6xx (Device Tree)
[ 34.189519] Backtrace:
[ 34.192033] [<
8010c4b4>] (dump_backtrace) from [<
8010c788>] (show_stack+0x20/0x24)
[ 34.199680] r6:
9f5dc010 r5:
00000011 r4:
9f5dc010 r3:
00000000
[ 34.205434] [<
8010c768>] (show_stack) from [<
80679d38>] (dump_stack+0x24/0x28)
[ 34.212719] [<
80679d14>] (dump_stack) from [<
804844a8>] (mv88e6xxx_read+0x70/0x7c)
[ 34.220376] [<
80484438>] (mv88e6xxx_read) from [<
804870dc>] (mv88e6xxx_port_get_cmode+0x34/0x4c)
[ 34.229257] r5:
a09cd128 r4:
9ee31d07
[ 34.232880] [<
804870a8>] (mv88e6xxx_port_get_cmode) from [<
80487e6c>] (mv88e6352_port_has_serdes+0x24/0x64)
[ 34.242690] r4:
9f5dc010
[ 34.245309] [<
80487e48>] (mv88e6352_port_has_serdes) from [<
804880b8>] (mv88e6352_serdes_get_stats+0x28/0x12c)
[ 34.255389] r4:
00000001
[ 34.257973] [<
80488090>] (mv88e6352_serdes_get_stats) from [<
804811e8>] (mv88e6xxx_get_ethtool_stats+0xb0/0xc0)
[ 34.268156] r10:
00000000 r9:
00000000 r8:
00000000 r7:
a09cd020 r6:
00000001 r5:
9f5dc01c
[ 34.276052] r4:
9f5dc010
[ 34.278631] [<
80481138>] (mv88e6xxx_get_ethtool_stats) from [<
8064f740>] (dsa_slave_get_ethtool_stats+0xbc/0xc4)
mv88e6xxx_get_ethtool_stats() calls mv88e6xxx_get_stats() which calls both
chip->info->ops->stats_get_stats(), which holds the register lock, and
chip->info->ops->serdes_get_stats() which does not. Have
chip->info->ops->serdes_get_stats() be running with the register lock held to
avoid such assertions.
Fixes: 436fe17d273b ("net: dsa: mv88e6xxx: Allow the SERDES interfaces to have statistics")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Andrew Lunn [Sat, 17 Mar 2018 19:21:09 +0000 (20:21 +0100)]
net: dsa: mv88e6xxx: Fix IRQ when loading module
Handle polled interrupts correctly when loading the module.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Fixes: 294d711ee8c0 ("net: dsa: mv88e6xxx: Poll when no interrupt defined")
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sun, 18 Mar 2018 00:15:14 +0000 (20:15 -0400)]
Merge branch 'selftests-pmtu-Add-further-vti-vti6-MTU-and-PMTU-tests'
Stefano Brivio says:
====================
selftests: pmtu: Add further vti/vti6 MTU and PMTU tests
Patches 5/10 to 10/10 add tests to verify default MTU assignment
for vti4 and vti6 interfaces, to check that MTU values set on new
link and link changes are properly taken and validated, and to
verify PMTU exceptions on vti4 interfaces.
Patch 1/10 reverses function return codes as suggested by David
Ahern.
Patch 2/10 fixes the helper to fetch exceptions MTU to run in the
passed namespace.
Patches 3/10 and 4/10 are preparation work to make it easier to
introduce those tests.
v2: Reverse return codes, and make output prettier in 4/9 by
using padded printf, test descriptions and buffered error
strings. Remove accidental output to /dev/kmsg from 10/10
(was 9/9).
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Stefano Brivio [Sat, 17 Mar 2018 01:31:47 +0000 (02:31 +0100)]
selftests: pmtu: Add pmtu_vti6_link_change_mtu test
This test checks that MTU configured from userspace is used on
link creation and changes, and that when it's not passed from
userspace, it's calculated properly from the MTU of the lower
layer.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stefano Brivio [Sat, 17 Mar 2018 01:31:46 +0000 (02:31 +0100)]
selftests: pmtu: Add pmtu_vti6_link_add_mtu test
Same as pmtu_vti4_link_add_mtu test, but for IPv6.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stefano Brivio [Sat, 17 Mar 2018 01:31:45 +0000 (02:31 +0100)]
selftests: pmtu: Add pmtu_vti4_link_add_mtu test
This test checks that MTU given on vti link creation is actually
configured, and that tunnel is not created with an invalid MTU
value.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stefano Brivio [Sat, 17 Mar 2018 01:31:44 +0000 (02:31 +0100)]
selftests: pmtu: Add test_pmtu_vti4_exception test
This test checks that PMTU exceptions are created only when
needed on IPv4 routes with vti and xfrm, and their PMTU value is
checked as well.
We can't adopt the same approach as test_pmtu_vti6_exception()
here, because on IPv4 administrative MTU changes won't be
reflected directly on PMTU.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stefano Brivio [Sat, 17 Mar 2018 01:31:43 +0000 (02:31 +0100)]
selftests: pmtu: Add pmtu_vti6_default_mtu test
Same as pmtu_vti4_default_mtu, but on IPv6 with vti6.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stefano Brivio [Sat, 17 Mar 2018 01:31:42 +0000 (02:31 +0100)]
selftests: pmtu: Add pmtu_vti4_default_mtu test
This test checks that the MTU assigned by default to a vti (IPv4)
interface created on top of veth is simply veth's MTU minus the
length of the encapsulated IPv4 header.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stefano Brivio [Sat, 17 Mar 2018 01:31:41 +0000 (02:31 +0100)]
selftests: pmtu: Introduce support for multiple tests
Introduce list of tests and their descriptions, and loop on it
in main body.
Tests will now just take care of calling setup with a list of
"units" they need, and return 0 on success, 1 on failure, 2 if
the test had to be skipped.
Main script body will take care of displaying results and
cleaning up after every test. Introduce guard variable so that
we don't clean up twice in case of interrupts or unexpected
failures.
The pmtu_vti6_exception test can now run its third step even if
the previous one failed, as we can return values from it.
Also introduce support to display test descriptions, and display
aligned OK/FAIL/SKIP test outcomes. Buffer error strings so that
in case of failure we can display them right under the outcome
for each test.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stefano Brivio [Sat, 17 Mar 2018 01:31:40 +0000 (02:31 +0100)]
selftests: pmtu: Factor out MTU parsing helper
...so that it can be used for any iproute command output.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stefano Brivio [Sat, 17 Mar 2018 01:31:39 +0000 (02:31 +0100)]
selftests: pmtu: Use namespace command prefix to fetch route mtu
In
7af137b72131 ("selftests: net: Introduce first PMTU test") I
accidentally assumed route_get_* helpers would run from a single
namespace. Make them a bit more generic, by passing the
namespace command prefix as a parameter instead.
Fixes: 7af137b72131 ("selftests: net: Introduce first PMTU test")
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stefano Brivio [Sat, 17 Mar 2018 01:31:38 +0000 (02:31 +0100)]
selftests: pmtu: Reverse return codes of functions
David suggests it's more intuitive to return non-zero on
failures, and zero on success.
No need to introduce tail 'return 0' in functions, they will
return the exit code of the last command anyway.
Suggested-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sun, 18 Mar 2018 00:12:40 +0000 (20:12 -0400)]
Merge branch 'ibmvnic-Update-TX-pool-and-TX-routines'
Thomas Falcon says:
====================
ibmvnic: Update TX pool and TX routines
This patch restructures the TX pool data structure and provides a
separate TX pool array for TSO transmissions. This is already used
in some way due to our unique DMA situation, namely that we cannot
use single DMA mappings for packet data. Previously, both buffer
arrays used the same pool entry. This restructuring allows for
some additional cleanup in the driver code, especially in some
places in the device transmit routine.
In addition, it allows us to more easily track the consumer
and producer indexes of a particular pool. This has been
further improved by better tracking of in-use buffers to
prevent possible data corruption in case an invalid buffer
entry is used.
v5: Fix bisectability mistake in the first patch. Removed
TSO-specific data in a later patch when it is no longer used.
v4: Fix error in 7th patch that causes an oops by using
the older fixed value for number of buffers instead
of the respective field in the tx pool data structure
v3: Forgot to update TX pool cleaning function to handle new data
structures. Included 7th patch for that.
v2: Fix typo in 3/6 commit subject line
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Thomas Falcon [Sat, 17 Mar 2018 01:00:31 +0000 (20:00 -0500)]
ibmvnic: Remove unused TSO resources in TX pool structure
Finally, remove the TSO-specific fields in the TX pool
strcutures. These are no longer needed with the introduction
of separate buffer pools for TSO transmissions.
Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>