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version.h inclusion is not necessary as detected by versioncheck.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The ioaddr local variable is assigned to but never used in the
smc911x_rx_dma_irq() function, remove it.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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bond_open is not setting the inactive flag correctly for some modes (alb and
tlb), resulting in error behavior if the bond has been administratively set
down and then back up. This effect should not occur when slaves are added while
the bond is up; it's something that only happens after a down/up bounce of the
bond.
For example, in bond tlb or alb mode, domu send some ARP request which go out
from dom0 bond's active slave, then the ARP broadcast request packets go back to
inactive slave from switch, because the inactive slave's inactive flag is zero,
kernel will receive the packets and pass them to bridge that cause dom0's bridge
map domu's MAC address to port of bond, bridge should map domu's MAC to port of
vif.
Signed-off-by: Zheng Li <zheng.x.li@oracle.com>
Signed-off-by: Jay Vosburgh <j.vosburgh@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Recycling skb always had been very tough...
This time it appears GRO layer can accumulate skb->truesize
adjustments made by drivers when they attach a fragment to skb.
skb_gro_receive() can only subtract from skb->truesize the used part
of a fragment.
I spotted this problem seeing TcpExtPruneCalled and
TcpExtTCPRcvCollapsed that were unexpected with a recent kernel, where
TCP receive window should be sized properly to accept traffic coming
from a driver not overshooting skb->truesize.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch adds support for the Micrel KSZ8864RMN switch to the spi_ks8995
driver. The KSZ8864RMN switch has a wider 256-byte register space.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit 5902385a2440a55f005b266c93e0bb9398e5a62b ("tipc: obsolete
the remote management feature") introduces a regression where node
topology events are not being generated because the publication
that triggers this: {0, <z.c.n>, <z.c.n>} is no longer available.
This will break applications that rely on node events to discover
when nodes join/leave a cluster.
We fix this by advertising the node publication when TIPC enters
networking mode, and withdraws it upon shutdown.
Signed-off-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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sxgbe_drv_probe: mdio and priv->hw leaks
sxgbe_drv_remove: clk and priv->hw leaks
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Acked-by: Byungho An <bh74.an@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Acked-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently there is no way how to find out if a device supports busy
polling. So add a feature and make it dependent on ndo_busy_poll
existence.
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently, in packet_direct_xmit() we test the assigned netdevice queue
for netif_xmit_frozen_or_stopped() before doing an ndo_start_xmit().
This can have the side-effect that BQL enabled drivers which make use
of netdev_tx_sent_queue() internally, set __QUEUE_STATE_STACK_XOFF from
within the stack and would not fully fill the device's TX ring from
packet sockets with PACKET_QDISC_BYPASS enabled.
Instead, use a test without BQL bit so that bursts can be absorbed
into the NICs TX ring. Fix and code suggested by Eric Dumazet, thanks!
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Since commit 015f0688f57c ("net: net: add a core netdev->tx_dropped
counter"), we can now account for TX drops from within the core
stack instead of drivers.
Therefore, fix packet_direct_xmit() and increase drop count when we
encounter a problem before driver's xmit function was called (we do
not want to doubly account for it).
Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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An old inefficiency of the TX path that we are grant mapping the first slot,
and then copy the header part to the linear area. Instead, doing a grant copy
for that header straight on is more reasonable. Especially because there are
ongoing efforts to make Xen avoiding TLB flush after unmap when the page were
not touched in Dom0. In the original way the memcpy ruined that.
The key changes:
- the vif has a tx_copy_ops array again
- xenvif_tx_build_gops sets up the grant copy operations
- we don't have to figure out whether the header and first frag are on the same
grant mapped page or not
Note, we only grant copy PKT_PROT_LEN bytes from the first slot, the rest (if
any) will be on the first frag, which is grant mapped. If the first slot is
smaller than PKT_PROT_LEN, then we grant copy that, and later __pskb_pull_tail
will pull more from the frags (if any)
Signed-off-by: Zoltan Kiss <zoltan.kiss@citrix.com>
Reviewed-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Rename identifiers to state explicitly that they refer to map ops.
Signed-off-by: Zoltan Kiss <zoltan.kiss@citrix.com>
Reviewed-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The qlcnic driver fails to build on ARM with errors like:
In file included from drivers/net/ethernet/qlogic/qlcnic/qlcnic.h:36:0,
from drivers/net/ethernet/qlogic/qlcnic/qlcnic_hw.c:8:
drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.h:585:1: error: unknown type name 'irqreturn_t'
irqreturn_t qlcnic_83xx_clear_legacy_intr(struct qlcnic_adapter *);
^
Nothing in the driver is explicitly including the irq definitions, so we
add an include of linux/irq.h to pick them up.
Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The enic driver fails to build on ARM with:
In file included from drivers/net/ethernet/cisco/enic/enic_res.c:40:0:
drivers/net/ethernet/cisco/enic/enic.h:48:2: error: expected specifier-qualifier-list before 'irqreturn_t'
irqreturn_t (*isr)(int, void *);
^
Nothing in the driver is explicitly including the irq definitions, so we add
an include of linux/irq.h to pick them up.
Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The bnx2x driver fails to build on ARM with:
In file included from drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c:28:0:
drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h:243:1: error: unknown type name 'irqreturn_t'
irqreturn_t bnx2x_msix_sp_int(int irq, void *dev_instance);
^
drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h:251:1: error: unknown type name 'irqreturn_t'
irqreturn_t bnx2x_interrupt(int irq, void *dev_instance);
^
Nothing in bnx2x_link.c or bnx2x_cmn.h is explicitly including the irq
definitions, so we add an include of linux/irq.h to pick them up.
Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Return -EINVAL unless all of user-given strings are correctly
NUL-terminated.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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fix build errors:
drivers/net/ethernet/ti/cpts.c:266:12: error: 'ETH_HLEN' undeclared (first use in this function)
drivers/net/ethernet/ti/cpts.c:276:23: error: 'VLAN_HLEN' undeclared (first use in this function)
Fixes: 408eccce3204 ("net: ptp: move PTP classifier in its own file")
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Suggested-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If the vxlan interface is created without explicit group definition,
there are corner cases which may cause kernel panic.
For instance, in the following scenario:
node A:
$ ip link add dev vxlan42 address 2c:c2:60:00:10:20 type vxlan id 42
$ ip addr add dev vxlan42 10.0.0.1/24
$ ip link set up dev vxlan42
$ arp -i vxlan42 -s 10.0.0.2 2c:c2:60:00:01:02
$ bridge fdb add dev vxlan42 to 2c:c2:60:00:01:02 dst <IPv4 address>
$ ping 10.0.0.2
node B:
$ ip link add dev vxlan42 address 2c:c2:60:00:01:02 type vxlan id 42
$ ip addr add dev vxlan42 10.0.0.2/24
$ ip link set up dev vxlan42
$ arp -i vxlan42 -s 10.0.0.1 2c:c2:60:00:10:20
node B crashes:
vxlan42: 2c:c2:60:00:10:20 migrated from 4011:eca4:c0a8:6466:c0a8:6415:8e09:2118 to (invalid address)
vxlan42: 2c:c2:60:00:10:20 migrated from 4011:eca4:c0a8:6466:c0a8:6415:8e09:2118 to (invalid address)
BUG: unable to handle kernel NULL pointer dereference at 0000000000000046
IP: [<ffffffff8143c459>] ip6_route_output+0x58/0x82
PGD 7bd89067 PUD 7bd4e067 PMD 0
Oops: 0000 [#1] SMP
Modules linked in:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.14.0-rc8-hvx-xen-00019-g97a5221-dirty #154
Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
task: ffff88007c774f50 ti: ffff88007c79c000 task.ti: ffff88007c79c000
RIP: 0010:[<ffffffff8143c459>] [<ffffffff8143c459>] ip6_route_output+0x58/0x82
RSP: 0018:ffff88007fd03668 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffffffff8186a000 RCX: 0000000000000040
RDX: 0000000000000000 RSI: ffff88007b0e4a80 RDI: ffff88007fd03754
RBP: ffff88007fd03688 R08: ffff88007b0e4a80 R09: 0000000000000000
R10: 0200000a0100000a R11: 0001002200000000 R12: ffff88007fd03740
R13: ffff88007b0e4a80 R14: ffff88007b0e4a80 R15: ffff88007bba0c50
FS: 0000000000000000(0000) GS:ffff88007fd00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000046 CR3: 000000007bb60000 CR4: 00000000000006e0
Stack:
0000000000000000 ffff88007fd037a0 ffffffff8186a000 ffff88007fd03740
ffff88007fd036c8 ffffffff814320bb 0000000000006e49 ffff88007b8b7360
ffff88007bdbf200 ffff88007bcbc000 ffff88007b8b7000 ffff88007b8b7360
Call Trace:
<IRQ>
[<ffffffff814320bb>] ip6_dst_lookup_tail+0x2d/0xa4
[<ffffffff814322a5>] ip6_dst_lookup+0x10/0x12
[<ffffffff81323b4e>] vxlan_xmit_one+0x32a/0x68c
[<ffffffff814a325a>] ? _raw_spin_unlock_irqrestore+0x12/0x14
[<ffffffff8104c551>] ? lock_timer_base.isra.23+0x26/0x4b
[<ffffffff8132451a>] vxlan_xmit+0x66a/0x6a8
[<ffffffff8141a365>] ? ipt_do_table+0x35f/0x37e
[<ffffffff81204ba2>] ? selinux_ip_postroute+0x41/0x26e
[<ffffffff8139d0c1>] dev_hard_start_xmit+0x2ce/0x3ce
[<ffffffff8139d491>] __dev_queue_xmit+0x2d0/0x392
[<ffffffff813b380f>] ? eth_header+0x28/0xb5
[<ffffffff8139d569>] dev_queue_xmit+0xb/0xd
[<ffffffff813a5aa6>] neigh_resolve_output+0x134/0x152
[<ffffffff813db741>] ip_finish_output2+0x236/0x299
[<ffffffff813dc074>] ip_finish_output+0x98/0x9d
[<ffffffff813dc749>] ip_output+0x62/0x67
[<ffffffff813da9f2>] dst_output+0xf/0x11
[<ffffffff813dc11c>] ip_local_out+0x1b/0x1f
[<ffffffff813dcf1b>] ip_send_skb+0x11/0x37
[<ffffffff813dcf70>] ip_push_pending_frames+0x2f/0x33
[<ffffffff813ff732>] icmp_push_reply+0x106/0x115
[<ffffffff813ff9e4>] icmp_reply+0x142/0x164
[<ffffffff813ffb3b>] icmp_echo.part.16+0x46/0x48
[<ffffffff813c1d30>] ? nf_iterate+0x43/0x80
[<ffffffff813d8037>] ? xfrm4_policy_check.constprop.11+0x52/0x52
[<ffffffff813ffb62>] icmp_echo+0x25/0x27
[<ffffffff814005f7>] icmp_rcv+0x1d2/0x20a
[<ffffffff813d8037>] ? xfrm4_policy_check.constprop.11+0x52/0x52
[<ffffffff813d810d>] ip_local_deliver_finish+0xd6/0x14f
[<ffffffff813d8037>] ? xfrm4_policy_check.constprop.11+0x52/0x52
[<ffffffff813d7fde>] NF_HOOK.constprop.10+0x4c/0x53
[<ffffffff813d82bf>] ip_local_deliver+0x4a/0x4f
[<ffffffff813d7f7b>] ip_rcv_finish+0x253/0x26a
[<ffffffff813d7d28>] ? inet_add_protocol+0x3e/0x3e
[<ffffffff813d7fde>] NF_HOOK.constprop.10+0x4c/0x53
[<ffffffff813d856a>] ip_rcv+0x2a6/0x2ec
[<ffffffff8139a9a0>] __netif_receive_skb_core+0x43e/0x478
[<ffffffff812a346f>] ? virtqueue_poll+0x16/0x27
[<ffffffff8139aa2f>] __netif_receive_skb+0x55/0x5a
[<ffffffff8139aaaa>] process_backlog+0x76/0x12f
[<ffffffff8139add8>] net_rx_action+0xa2/0x1ab
[<ffffffff81047847>] __do_softirq+0xca/0x1d1
[<ffffffff81047ace>] irq_exit+0x3e/0x85
[<ffffffff8100b98b>] do_IRQ+0xa9/0xc4
[<ffffffff814a37ad>] common_interrupt+0x6d/0x6d
<EOI>
[<ffffffff810378db>] ? native_safe_halt+0x6/0x8
[<ffffffff810110c7>] default_idle+0x9/0xd
[<ffffffff81011694>] arch_cpu_idle+0x13/0x1c
[<ffffffff8107480d>] cpu_startup_entry+0xbc/0x137
[<ffffffff8102e741>] start_secondary+0x1a0/0x1a5
Code: 24 14 e8 f1 e5 01 00 31 d2 a8 32 0f 95 c2 49 8b 44 24 2c 49 0b 44 24 24 74 05 83 ca 04 eb 1c 4d 85 ed 74 17 49 8b 85 a8 02 00 00 <66> 8b 40 46 66 c1 e8 07 83 e0 07 c1 e0 03 09 c2 4c 89 e6 48 89
RIP [<ffffffff8143c459>] ip6_route_output+0x58/0x82
RSP <ffff88007fd03668>
CR2: 0000000000000046
---[ end trace 4612329caab37efd ]---
When vxlan interface is created without explicit group definition, the
default_dst protocol family is initialiazed to AF_UNSPEC and the driver
assumes IPv4 configuration. On the other side, the default_dst protocol
family is used to differentiate between IPv4 and IPv6 cases and, since,
AF_UNSPEC != AF_INET, the processing takes the IPv6 path.
Making the IPv4 assumption explicit by settting default_dst protocol
family to AF_INET4 and preventing mixing of IPv4 and IPv6 addresses in
snooped fdb entries fixes the corner case crashes.
Signed-off-by: Mike Rapoport <mike.rapoport@ravellosystems.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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pidns_get()->get_pid_ns() can hit ns == NULL. This task_struct can't
go away, but task_active_pid_ns(task) is NULL if release_task(task)
was already called. Alternatively we could change get_pid_ns(ns) to
check ns != NULL, but it seems that other callers are fine.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Eric W. Biederman ebiederm@xmission.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Commit 74397174989e5f70 attempted to clean up the power management options
for arm64, but when things were merged it didn't fully take effect. Fix
it again.
Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Commit 2223f6f6eeaa "x86: Clean up dumpstack_64.c code" changed
the irq_stack processing a little from what it was before.
The irq_stack_end variable needed to be cleared after its first
use. By setting irq_stack to the per cpu irq_stack and passing
that to analyze_stack(), and then clearing it after it is processed,
we can get back the original behavior.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Commit 2223f6f6eeaa "x86: Clean up dumpstack_64.c code" moved the used
variable to a local within the loop, but the in_exception_stack()
depended on being non-volatile with the ability to change it.
By always re-initializing the "used" variable to zero, it would cause
the in_exception_stack() to return the same thing each time, and
cause the dump_stack loop to go into an infinite loop.
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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retmain -> remain
Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Replace the test in zap_completion_queue to test when it is safe to
free skbs in hard irq context with skb_irq_freeable ensuring we only
free skbs when it is safe, and removing the possibility of subtle
problems.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently netpoll and skb_release_head_state assume that a skb is
freeable in hard irq context except when skb->destructor is set.
The reality is far from this. So add a function skb_irq_freeable to
compute the full test and in the process be the living documentation
of what the requirements are of actually freeing a skb in hard irq
context.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit 2b3d7b758c687("qlcnic: Add VXLAN Rx offload support") uses
vxlan_get_rx_port() which caused build failure when VXLAN=m.
This patch fixes the build failure by adding dependency on VXLAN
in Kconfig of qlcnic module and use vxlan_get_rx_port() and support
code accordingly.
Signed-off-by: Shahed Shaikh <shahed.shaikh@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This commit fixes a build error reported by Fengguang, that is
triggered when CONFIG_NETWORK_PHY_TIMESTAMPING is not set:
ERROR: "ptp_classify_raw" [drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe.ko] undefined!
The fix is to introduce its own file for the PTP BPF classifier,
so that PTP_1588_CLOCK and/or NETWORK_PHY_TIMESTAMPING can select
it independently from each other. IXP4xx driver on ARM needs to
select it as well since it does not seem to select PTP_1588_CLOCK
or similar that would pull it in automatically.
This also allows for hiding all of the internals of the BPF PTP
program inside that file, and only exporting relevant API bits
to drivers.
This patch also adds a kdoc documentation of ptp_classify_raw()
API to make it clear that it can return PTP_CLASS_* defines. Also,
the BPF program has been translated into bpf_asm code, so that it
can be more easily read and altered (extensively documented in [1]).
In the kernel tree under tools/net/ we have bpf_asm and bpf_dbg
tools, so the commented program can simply be translated via
`./bpf_asm -c prog` where prog is a file that contains the
commented code. This makes it easily readable/verifiable and when
there's a need to change something, jump offsets etc do not need
to be replaced manually which can be very error prone. Instead,
a newly translated version via bpf_asm can simply replace the old
code. I have checked opcode diffs before/after and it's the very
same filter.
[1] Documentation/networking/filter.txt
Fixes: 164d8c666521 ("net: ptp: do not reimplement PTP/BPF classifier")
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Jiri Benc <jbenc@redhat.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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CONFIG_PROC_DEVICETREE has been removed from the tree. This commit
removes a dangling select of the config symbol.
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Cc: Paul Bolle <pebolle@tiscali.nl>
Cc: Rob Herring <rob.herring@linaro.org>
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The "core_ops" variable isn't referenced outside this file and Sparse
complains about it:
drivers/net/ethernet/samsung/sxgbe/sxgbe_core.c:239:29: warning:
symbol 'core_ops' was not declared. Should it be static?
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Bitwise '|' was intended here instead of logical '||'.
Fixes: 1edb9ca69e8a ('net: sxgbe: add basic framework for Samsung 10Gb ethernet driver')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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"err" is always zero at this point so we always unregister and free the
mdio_bus before returning success. This seems like left over code and
I have deleted it.
Fixes: 1edb9ca69e8a ('net: sxgbe: add basic framework for Samsung 10Gb ethernet driver')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When using the "separate_tx_channels=1" module parameter, the TX queues are
initially numbered starting from the first TX-only channel number (after all the
RX-only channels). efx_set_channels() renumbers the queues so that they are
indexed from zero.
On EF10, the TX queues need to be relabelled in this way before calling the
dimension_resources NIC type operation, otherwise the TX queue PIO buffers can be
linked to the wrong VIs when using "separate_tx_channels=1".
Added comments to explain UC/WC mappings for PIO buffers
Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When netback discovers frontend is sending malformed packet it will
disables the interface which serves that frontend.
However disabling a network interface involving taking a mutex which
cannot be done in softirq context, so we need to defer this process to
kthread context.
This patch does the following:
1. introduce a flag to indicate the interface is disabled.
2. check that flag in TX path, don't do any work if it's true.
3. check that flag in RX path, turn off that interface if it's true.
The reason to disable it in RX path is because RX uses kthread. After
this change the behavior of netback is still consistent -- it won't do
any TX work for a rogue frontend, and the interface will be eventually
turned off.
Also change a "continue" to "break" after xenvif_fatal_tx_err, as it
doesn't make sense to continue processing packets if frontend is rogue.
This is a fix for XSA-90.
Reported-by: Török Edwin <edwin@etorok.net>
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Make sure that vxlan_get_rx_port() is present in the kernel build in a manner
consistent with mlx4, else mlx4 can be made built-in where vxlan a module and
the phase of the build linking fails. Add CONFIG_MLX4_EN_VXLAN for that.
Also, #ifdef the advertizement and implementation of the mlx4 vxlan ndo
calls and related code under this config directive.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Introduce a CONFIG_BE2NET_VXLAN define to control be2net's build
dependency on the VXLAN driver.
Without this fix, the kernel build fails when VxLAN driver is
selected to be built as a module while be2net is built-in.
fixes: c9c47142 ("be2net: csum, tso and rss steering offload support for VxLAN")
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit 9b2777d6089bcd (ieee802154: add TX power control to wpan_phy)
and following erroneously added CSMA and CCA parameters for 802.15.4
devices as PHY parameters, while they are actually MAC parameters and
can differ for any two WPAN instances. Since it is now sensible to have
multiple WPAN devices with differing CSMA/CCA parameters, make these
parameters MAC parameters instead.
Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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All 802.15.4 PHY devices with drivers in tree can support only one WPAN
at any given time, yet the stack allows arbitrarily many WPAN devices to
be created and up at the same time. This cannot work with what the
hardware provides, and in the current implementation, provides an easy
DoS vector to any process on the system that may call socket() and
sendmsg().
Thus, allow only one WPAN per PHY to be up at once, just like mac80211
does for managed devices.
Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This minor patch fixes the following warning when doing
a `make htmldocs`:
DOCPROC Documentation/DocBook/networking.xml
Warning(.../net/core/filter.c:135): No description found for parameter 'insn'
Warning(.../net/core/filter.c:135): Excess function parameter 'fentry' description in '__sk_run_filter'
HTML Documentation/DocBook/networking.html
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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nla_strcmp compares the string length plus one, so it's implicitly
including the nul-termination in the comparison.
int nla_strcmp(const struct nlattr *nla, const char *str)
{
int len = strlen(str) + 1;
...
d = memcmp(nla_data(nla), str, len);
However, if NLA_STRING is used, userspace can send us a string without
the nul-termination. This is a problem since the string
comparison will not match as the last byte may be not the
nul-termination.
Fix this by skipping the comparison of the nul-termination if the
attribute data is nul-terminated. Suggested by Thomas Graf.
Cc: Florian Westphal <fw@strlen.de>
Cc: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix unfortunate mismerge between the fixes and sony branch causing
code duplication and unterminated basic block.
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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The Sixaxis and DualShock 4 want HID output reports sent on the control
endpoint when connected via Bluetooth. Set the
HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP flag for these devices so hidraw write()
works properly.
Signed-off-by: Frank Praznik <frank.praznik@oh.rr.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Byte 31 of the Sixaxis report can change depending on whether or not the
controller is rumbling. Using bit 3 is the only reliable way to detect the
state of the cable regardless of rumble activity.
Signed-off-by: Frank Praznik <frank.praznik@oh.rr.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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UHID_CREATE2:
HID report descriptor data (rd_data) is an array in struct uhid_create2_req,
instead of a pointer. Enables use from languages that don't support pointers,
e.g. Python.
UHID_INPUT2:
Data array is the last field of struct uhid_input2_req. Enables userspace to
write only the required bytes to kernel (ev.type + ev.u.input2.size + the part
of the data array that matters), instead of the entire struct uhid_input2_req.
Note:
UHID_CREATE2 increases the total size of struct uhid_event slightly, thus
increasing the size of messages that are queued for userspace. However, this
won't affect the userspace processing of these events.
[Jiri Kosina <jkosina@suse.cz>: adjust to hid_get_raw_report() and
hid_output_raw_report() API changes]
Signed-off-by: Petri Gynther <pgynther@google.com>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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There is no point to toggle the RX led for every packet. Especially if
we have a full FIFO we want to avoid everything we can.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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The function loads the message object from the hardware to get the
payload length. The previous patch stores that information in an
array, so we can avoid the hardware access.
Remove the hardware access and move the led toggle outside of the
spinlocked region. Toggle the led only once when at least one packet
has been received.
Binary size shrinks along with the code
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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We can avoid the HW access in TX cleanup path for retrieving the DLC
of the sent package if we store the DLC in a private array.
Ideally this should be handled in the can_echo_skb functions, but I
leave that exercise to the CAN folks.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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commit 4ce78a838c (can: c_can: Speed up rx_poll function) hyped a
performance improvement by reducing the access to the interrupt
pending register from a dual 16 bit to a single 16 bit access. Wow!
Thereby it crippled the driver to cast the 16 msg objects in stone,
which is completly braindead as contemporary hardware has up to 128
message objects. Supporting larger object buffers is a major surgery,
but it'd be definitely worth it especially as the driver does not
support HW message filtering ....
The logic of the "FIFO" implementation is to split the FIFO in half.
For the lower half we read the buffers and clear the interrupt pending
bit, but keep the newdat bit set, so the HW will queue above those
buffers.
When we read out the last low buffer then we reenable all the low half
buffers by clearing the newdat bit.
The upper half buffers clear the newdat and the interrupt pending bit
right away as we know that the lower half bits are clear and give us a
headstart against the hardware.
Now the implementation is:
transfer_message_object()
read_object_and_put_into_skb();
if (obj < END_OF_LOW_BUF)
clear_intpending(obj)
else if (obj > END_OF_LOW_BUF)
clear_intpending_and_newdat(obj)
else if (obj == END_OF_LOW_BUF)
clear_newdat_of_all_low_objects()
The hardware allows to avoid most of the mess simply because we can
tell the transfer_message_object() function to clear bits right away.
So we can be clever and do:
if (obj <= END_OF_LOW_BUF)
ctrl = TRANSFER_MSG | CLEAR_INTPND;
else
ctrl = TRANSFER_MSG | CLEAR_INTPND | CLEAR_NEWDAT;
transfer_message_object(ctrl)
read_object_and_put_into_skb();
if (obj == END_OF_LOW_BUF)
clear_newdat_of_all_low_objects()
So we save a complete control operation on all message objects except
the one which is the end of the low buffer. That's a few micro seconds
per object.
I'm not adding a boasting profile to that, simply because it's self
explaining.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
[mkl: adjusted subject and commit message]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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If every other line contains line breaks, that's a clear sign for
indentation level madness. Split out the inner loop and move the code
to a separate function. gcc creates slightly worse code for that, but
we'll fix that in the next step.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
[mkl: adjusted subject]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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The network core does not serialize the access to the hardware. The
xmit related code lets the following happen:
CPU0 CPU1
interrupt()
do_poll()
c_can_do_tx()
Fiddle with HW and xmit()
internal data Fiddle with HW and
internal data
due the complete lack of serialization.
Add proper locking.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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Sachin Kamat
Laurent Pinchart
zheng.li
Eric Dumazet
Philipp Zabel
Erik Hugne
françois romieu
Jiri Pirko
Daniel Borkmann
Zoltan Kiss
Josh Boyer
Josh Boyer
YOSHIFUJI Hideaki / 吉藤英明
Alexei Starovoitov
Mike Rapoport
Oleg Nesterov
Steven Rostedt (Red Hat)
Li Zhong
Eric W. Biederman
Shahed Shaikh
Grant Likely
Dan Carpenter
Daniel Pieczko
Wei Liu
Or Gerlitz
Sathya Perla
Phoebe Buckheister
Pablo Neira
Jiri Kosina
Frank Praznik
Petri Gynther
Thomas Gleixner