net: rename netns_local to netns_immutable

The name 'netns_local' is confusing. A following commit will export it via
netlink, so let's use a more explicit name.

Reported-by: Eric Dumazet <edumazet

net: rename netns_local to netns_immutable

The name 'netns_local' is confusing. A following commit will export it via
netlink, so let's use a more explicit name.

Reported-by: Eric Dumazet <[email protected]>
Suggested-by: Kuniyuki Iwashima <[email protected]>
Signed-off-by: Nicolas Dichtel <[email protected]>
Reviewed-by: Kuniyuki Iwashima <[email protected]>
Signed-off-by: Paolo Abeni <[email protected]>

show more ...

openvswitch: Pass on secpath details for internal port rx.

Clearing the secpath for internal ports will cause packet drops when
ipsec offload or early SW ipsec decrypt are used. Systems that rely
o

openvswitch: Pass on secpath details for internal port rx.

Clearing the secpath for internal ports will cause packet drops when
ipsec offload or early SW ipsec decrypt are used. Systems that rely
on these will not be able to actually pass traffic via openvswitch.

There is still an open issue for a flow miss packet - this is because
we drop the extensions during upcall and there is no facility to
restore such data (and it is non-trivial to add such functionality
to the upcall interface). That means that when a flow miss occurs,
there will still be packet drops. With this patch, when a flow is
found then traffic which has an associated xfrm extension will
properly flow.

Signed-off-by: Aaron Conole <[email protected]>
Acked-by: Eelco Chaudron <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

show more ...

netdev_features: convert NETIF_F_NETNS_LOCAL to dev->netns_local

"Interface can't change network namespaces" is rather an attribute,
not a feature, and it can't be changed via Ethtool.
Make it a "co

netdev_features: convert NETIF_F_NETNS_LOCAL to dev->netns_local

"Interface can't change network namespaces" is rather an attribute,
not a feature, and it can't be changed via Ethtool.
Make it a "cold" private flag instead of a netdev_feature and free
one more bit.

Signed-off-by: Alexander Lobakin <[email protected]>
Signed-off-by: Paolo Abeni <[email protected]>

show more ...

netdev_features: convert NETIF_F_LLTX to dev->lltx

NETIF_F_LLTX can't be changed via Ethtool and is not a feature,
rather an attribute, very similar to IFF_NO_QUEUE (and hot).
Free one netdev_featur

netdev_features: convert NETIF_F_LLTX to dev->lltx

NETIF_F_LLTX can't be changed via Ethtool and is not a feature,
rather an attribute, very similar to IFF_NO_QUEUE (and hot).
Free one netdev_features_t bit and make it a "hot" private flag.

Signed-off-by: Alexander Lobakin <[email protected]>
Signed-off-by: Paolo Abeni <[email protected]>

show more ...

openvswitch: Remove generic .ndo_get_stats64

Commit 3e2f544dd8a33 ("net: get stats64 if device if driver is
configured") moved the callback to dev_get_tstats64() to net core, so,
unless the driver i

openvswitch: Remove generic .ndo_get_stats64

Commit 3e2f544dd8a33 ("net: get stats64 if device if driver is
configured") moved the callback to dev_get_tstats64() to net core, so,
unless the driver is doing some custom stats collection, it does not
need to set .ndo_get_stats64.

Since this driver is now relying in NETDEV_PCPU_STAT_TSTATS, then, it
doesn't need to set the dev_get_tstats64() generic .ndo_get_stats64
function pointer.

Signed-off-by: Breno Leitao <[email protected]>
Reviewed-by: Subbaraya Sundeep <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Paolo Abeni <[email protected]>

show more ...

openvswitch: Move stats allocation to core

With commit 34d21de99cea9 ("net: Move {l,t,d}stats allocation to core and
convert veth & vrf"), stats allocation could be done on net core instead
of this

openvswitch: Move stats allocation to core

With commit 34d21de99cea9 ("net: Move {l,t,d}stats allocation to core and
convert veth & vrf"), stats allocation could be done on net core instead
of this driver.

With this new approach, the driver doesn't have to bother with error
handling (allocation failure checking, making sure free happens in the
right spot, etc). This is core responsibility now.

Move openvswitch driver to leverage the core allocation.

Signed-off-by: Breno Leitao <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Paolo Abeni <[email protected]>

show more ...

openvswitch: Change the return type for vport_ops.send function hook to int

All usages of the vport_ops struct have the .send field set to
dev_queue_xmit or internal_dev_recv. Since most usages are

openvswitch: Change the return type for vport_ops.send function hook to int

All usages of the vport_ops struct have the .send field set to
dev_queue_xmit or internal_dev_recv. Since most usages are set to
dev_queue_xmit, the function hook should match the signature of
dev_queue_xmit.

The only call to vport_ops->send() is in net/openvswitch/vport.c and it
throws away the return value.

This mismatched return type breaks forward edge kCFI since the underlying
function definition does not match the function hook definition.

Reported-by: Dan Carpenter <[email protected]>
Link: https://github.com/ClangBuiltLinux/linux/issues/1703
Cc: [email protected]
Signed-off-by: Nathan Huckleberry <[email protected]>
Reviewed-by: Nathan Chancellor <[email protected]>
Acked-by: Eelco Chaudron <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

show more ...

openvswitch: allow specifying ifindex of new interfaces

CRIU is preserving ifindexes of net devices after restoration. However,
current Open vSwitch API does not allow to target ifindex, so we canno

openvswitch: allow specifying ifindex of new interfaces

CRIU is preserving ifindexes of net devices after restoration. However,
current Open vSwitch API does not allow to target ifindex, so we cannot
correctly restore OVS configuration.

Add new OVS_DP_ATTR_IFINDEX for OVS_DP_CMD_NEW and use it as desired
ifindex.
Use OVS_VPORT_ATTR_IFINDEX during OVS_VPORT_CMD_NEW to specify new netdev
ifindex.

Signed-off-by: Andrey Zhadchenko <[email protected]>
Acked-by: Christian Brauner (Microsoft) <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>

show more ...

openvswitch: move from strlcpy with unused retval to strscpy

Follow the advice of the below link and prefer 'strscpy' in this
subsystem. Conversion is 1:1 because the return value is not used.
Gener

openvswitch: move from strlcpy with unused retval to strscpy

Follow the advice of the below link and prefer 'strscpy' in this
subsystem. Conversion is 1:1 because the return value is not used.
Generated by a coccinelle script.

Link: https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw@mail.gmail.com/
Signed-off-by: Wolfram Sang <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

show more ...

net: openvswitch: use core API to update/provide stats

Commit d3fd65484c781 ("net: core: add dev_sw_netstats_tx_add") has added
function "dev_sw_netstats_tx_add()" to update net device per-cpu TX
st

net: openvswitch: use core API to update/provide stats

Commit d3fd65484c781 ("net: core: add dev_sw_netstats_tx_add") has added
function "dev_sw_netstats_tx_add()" to update net device per-cpu TX
stats.

Use this function instead of own code.

While on it, remove internal_get_stats() and replace it
with dev_get_tstats64().

Signed-off-by: Lev Stipakov <[email protected]>
Reviewed-by: Heiner Kallweit <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

show more ...

net: openvswitch: use new function dev_fetch_sw_netstats

Simplify the code by using new function dev_fetch_sw_netstats().

Signed-off-by: Heiner Kallweit <[email protected]>
Link: https://lore.ke

net: openvswitch: use new function dev_fetch_sw_netstats

Simplify the code by using new function dev_fetch_sw_netstats().

Signed-off-by: Heiner Kallweit <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

show more ...

net: openvswitch: use dev_sw_netstats_rx_add()

use new helper for netstats settings

Signed-off-by: Fabian Frederick <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

net: openvswitch: free vport unless register_netdevice() succeeds

syzbot found the following crash on:

HEAD commit: 1e78030e Merge tag 'mmc-v5.3-rc1' of git://git.kernel.org/..
git tree: u

net: openvswitch: free vport unless register_netdevice() succeeds

syzbot found the following crash on:

HEAD commit: 1e78030e Merge tag 'mmc-v5.3-rc1' of git://git.kernel.org/..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=148d3d1a600000
kernel config: https://syzkaller.appspot.com/x/.config?x=30cef20daf3e9977
dashboard link: https://syzkaller.appspot.com/bug?extid=13210896153522fe1ee5
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=136aa8c4600000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=109ba792600000

=====================================================================
BUG: memory leak
unreferenced object 0xffff8881207e4100 (size 128):
comm "syz-executor032", pid 7014, jiffies 4294944027 (age 13.830s)
hex dump (first 32 bytes):
00 70 16 18 81 88 ff ff 80 af 8c 22 81 88 ff ff .p........."....
00 b6 23 17 81 88 ff ff 00 00 00 00 00 00 00 00 ..#.............
backtrace:
[<000000000eb78212>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
[<000000000eb78212>] slab_post_alloc_hook mm/slab.h:522 [inline]
[<000000000eb78212>] slab_alloc mm/slab.c:3319 [inline]
[<000000000eb78212>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000006ea6c6>] kmalloc include/linux/slab.h:552 [inline]
[<00000000006ea6c6>] kzalloc include/linux/slab.h:748 [inline]
[<00000000006ea6c6>] ovs_vport_alloc+0x37/0xf0 net/openvswitch/vport.c:130
[<00000000f9a04a7d>] internal_dev_create+0x24/0x1d0 net/openvswitch/vport-internal_dev.c:164
[<0000000056ee7c13>] ovs_vport_add+0x81/0x190 net/openvswitch/vport.c:199
[<000000005434efc7>] new_vport+0x19/0x80 net/openvswitch/datapath.c:194
[<00000000b7b253f1>] ovs_dp_cmd_new+0x22f/0x410 net/openvswitch/datapath.c:1614
[<00000000e0988518>] genl_family_rcv_msg+0x2ab/0x5b0 net/netlink/genetlink.c:629
[<00000000d0cc9347>] genl_rcv_msg+0x54/0x9c net/netlink/genetlink.c:654
[<000000006694b647>] netlink_rcv_skb+0x61/0x170 net/netlink/af_netlink.c:2477
[<0000000088381f37>] genl_rcv+0x29/0x40 net/netlink/genetlink.c:665
[<00000000dad42a47>] netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
[<00000000dad42a47>] netlink_unicast+0x1ec/0x2d0 net/netlink/af_netlink.c:1328
[<0000000067e6b079>] netlink_sendmsg+0x270/0x480 net/netlink/af_netlink.c:1917
[<00000000aab08a47>] sock_sendmsg_nosec net/socket.c:637 [inline]
[<00000000aab08a47>] sock_sendmsg+0x54/0x70 net/socket.c:657
[<000000004cb7c11d>] ___sys_sendmsg+0x393/0x3c0 net/socket.c:2311
[<00000000c4901c63>] __sys_sendmsg+0x80/0xf0 net/socket.c:2356
[<00000000c10abb2d>] __do_sys_sendmsg net/socket.c:2365 [inline]
[<00000000c10abb2d>] __se_sys_sendmsg net/socket.c:2363 [inline]
[<00000000c10abb2d>] __x64_sys_sendmsg+0x23/0x30 net/socket.c:2363

BUG: memory leak
unreferenced object 0xffff88811723b600 (size 64):
comm "syz-executor032", pid 7014, jiffies 4294944027 (age 13.830s)
hex dump (first 32 bytes):
01 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 02 00 00 00 05 35 82 c1 .............5..
backtrace:
[<00000000352f46d8>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
[<00000000352f46d8>] slab_post_alloc_hook mm/slab.h:522 [inline]
[<00000000352f46d8>] slab_alloc mm/slab.c:3319 [inline]
[<00000000352f46d8>] __do_kmalloc mm/slab.c:3653 [inline]
[<00000000352f46d8>] __kmalloc+0x169/0x300 mm/slab.c:3664
[<000000008e48f3d1>] kmalloc include/linux/slab.h:557 [inline]
[<000000008e48f3d1>] ovs_vport_set_upcall_portids+0x54/0xd0 net/openvswitch/vport.c:343
[<00000000541e4f4a>] ovs_vport_alloc+0x7f/0xf0 net/openvswitch/vport.c:139
[<00000000f9a04a7d>] internal_dev_create+0x24/0x1d0 net/openvswitch/vport-internal_dev.c:164
[<0000000056ee7c13>] ovs_vport_add+0x81/0x190 net/openvswitch/vport.c:199
[<000000005434efc7>] new_vport+0x19/0x80 net/openvswitch/datapath.c:194
[<00000000b7b253f1>] ovs_dp_cmd_new+0x22f/0x410 net/openvswitch/datapath.c:1614
[<00000000e0988518>] genl_family_rcv_msg+0x2ab/0x5b0 net/netlink/genetlink.c:629
[<00000000d0cc9347>] genl_rcv_msg+0x54/0x9c net/netlink/genetlink.c:654
[<000000006694b647>] netlink_rcv_skb+0x61/0x170 net/netlink/af_netlink.c:2477
[<0000000088381f37>] genl_rcv+0x29/0x40 net/netlink/genetlink.c:665
[<00000000dad42a47>] netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
[<00000000dad42a47>] netlink_unicast+0x1ec/0x2d0 net/netlink/af_netlink.c:1328
[<0000000067e6b079>] netlink_sendmsg+0x270/0x480 net/netlink/af_netlink.c:1917
[<00000000aab08a47>] sock_sendmsg_nosec net/socket.c:637 [inline]
[<00000000aab08a47>] sock_sendmsg+0x54/0x70 net/socket.c:657
[<000000004cb7c11d>] ___sys_sendmsg+0x393/0x3c0 net/socket.c:2311
[<00000000c4901c63>] __sys_sendmsg+0x80/0xf0 net/socket.c:2356

BUG: memory leak
unreferenced object 0xffff8881228ca500 (size 128):
comm "syz-executor032", pid 7015, jiffies 4294944622 (age 7.880s)
hex dump (first 32 bytes):
00 f0 27 18 81 88 ff ff 80 ac 8c 22 81 88 ff ff ..'........"....
40 b7 23 17 81 88 ff ff 00 00 00 00 00 00 00 00 @.#.............
backtrace:
[<000000000eb78212>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
[<000000000eb78212>] slab_post_alloc_hook mm/slab.h:522 [inline]
[<000000000eb78212>] slab_alloc mm/slab.c:3319 [inline]
[<000000000eb78212>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<00000000006ea6c6>] kmalloc include/linux/slab.h:552 [inline]
[<00000000006ea6c6>] kzalloc include/linux/slab.h:748 [inline]
[<00000000006ea6c6>] ovs_vport_alloc+0x37/0xf0 net/openvswitch/vport.c:130
[<00000000f9a04a7d>] internal_dev_create+0x24/0x1d0 net/openvswitch/vport-internal_dev.c:164
[<0000000056ee7c13>] ovs_vport_add+0x81/0x190 net/openvswitch/vport.c:199
[<000000005434efc7>] new_vport+0x19/0x80 net/openvswitch/datapath.c:194
[<00000000b7b253f1>] ovs_dp_cmd_new+0x22f/0x410 net/openvswitch/datapath.c:1614
[<00000000e0988518>] genl_family_rcv_msg+0x2ab/0x5b0 net/netlink/genetlink.c:629
[<00000000d0cc9347>] genl_rcv_msg+0x54/0x9c net/netlink/genetlink.c:654
[<000000006694b647>] netlink_rcv_skb+0x61/0x170 net/netlink/af_netlink.c:2477
[<0000000088381f37>] genl_rcv+0x29/0x40 net/netlink/genetlink.c:665
[<00000000dad42a47>] netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
[<00000000dad42a47>] netlink_unicast+0x1ec/0x2d0 net/netlink/af_netlink.c:1328
[<0000000067e6b079>] netlink_sendmsg+0x270/0x480 net/netlink/af_netlink.c:1917
[<00000000aab08a47>] sock_sendmsg_nosec net/socket.c:637 [inline]
[<00000000aab08a47>] sock_sendmsg+0x54/0x70 net/socket.c:657
[<000000004cb7c11d>] ___sys_sendmsg+0x393/0x3c0 net/socket.c:2311
[<00000000c4901c63>] __sys_sendmsg+0x80/0xf0 net/socket.c:2356
[<00000000c10abb2d>] __do_sys_sendmsg net/socket.c:2365 [inline]
[<00000000c10abb2d>] __se_sys_sendmsg net/socket.c:2363 [inline]
[<00000000c10abb2d>] __x64_sys_sendmsg+0x23/0x30 net/socket.c:2363
=====================================================================

The function in net core, register_netdevice(), may fail with vport's
destruction callback either invoked or not. After commit 309b66970ee2
("net: openvswitch: do not free vport if register_netdevice() is failed."),
the duty to destroy vport is offloaded from the driver OTOH, which ends
up in the memory leak reported.

It is fixed by releasing vport unless device is registered successfully.
To do that, the callback assignment is defered until device is registered.

Reported-by: [email protected]
Fixes: 309b66970ee2 ("net: openvswitch: do not free vport if register_netdevice() is failed.")
Cc: Taehee Yoo <[email protected]>
Cc: Greg Rose <[email protected]>
Cc: Eric Dumazet <[email protected]>
Cc: Marcelo Ricardo Leitner <[email protected]>
Cc: Ying Xue <[email protected]>
Cc: Andrey Konovalov <[email protected]>
Signed-off-by: Hillf Danton <[email protected]>
Acked-by: Pravin B Shelar <[email protected]>
[sbrivio: this was sent to [email protected] and never made its way
to netdev -- resending original patch]
Signed-off-by: Stefano Brivio <[email protected]>
Reviewed-by: Greg Rose <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>

show more ...

netfilter: drop bridge nf reset from nf_reset

commit 174e23810cd31
("sk_buff: drop all skb extensions on free and skb scrubbing") made napi
recycle always drop skb extensions. The additional skb_ex

netfilter: drop bridge nf reset from nf_reset

commit 174e23810cd31
("sk_buff: drop all skb extensions on free and skb scrubbing") made napi
recycle always drop skb extensions. The additional skb_ext_del() that is
performed via nf_reset on napi skb recycle is not needed anymore.

Most nf_reset() calls in the stack are there so queued skb won't block
'rmmod nf_conntrack' indefinitely.

This removes the skb_ext_del from nf_reset, and renames it to a more
fitting nf_reset_ct().

In a few selected places, add a call to skb_ext_reset to make sure that
no active extensions remain.

I am submitting this for "net", because we're still early in the release
cycle. The patch applies to net-next too, but I think the rename causes
needless divergence between those trees.

Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Florian Westphal <[email protected]>
Signed-off-by: Pablo Neira Ayuso <[email protected]>

show more ...

net: openvswitch: do not free vport if register_netdevice() is failed.

In order to create an internal vport, internal_dev_create() is used and
that calls register_netdevice() internally.
If register

net: openvswitch: do not free vport if register_netdevice() is failed.

In order to create an internal vport, internal_dev_create() is used and
that calls register_netdevice() internally.
If register_netdevice() fails, it calls dev->priv_destructor() to free
private data of netdev. actually, a private data of this is a vport.

Hence internal_dev_create() should not free and use a vport after failure
of register_netdevice().

Test command
ovs-dpctl add-dp bonding_masters

Splat looks like:
[ 1035.667767] kasan: GPF could be caused by NULL-ptr deref or user memory access
[ 1035.675958] general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC KASAN PTI
[ 1035.676916] CPU: 1 PID: 1028 Comm: ovs-vswitchd Tainted: G B 5.2.0-rc3+ #240
[ 1035.676916] RIP: 0010:internal_dev_create+0x2e5/0x4e0 [openvswitch]
[ 1035.676916] Code: 48 c1 ea 03 80 3c 02 00 0f 85 9f 01 00 00 4c 8b 23 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 60 05 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 86 01 00 00 49 8b bc 24 60 05 00 00 e8 e4 68 f4
[ 1035.713720] RSP: 0018:ffff88810dcb7578 EFLAGS: 00010206
[ 1035.713720] RAX: dffffc0000000000 RBX: ffff88810d13fe08 RCX: ffffffff84297704
[ 1035.713720] RDX: 00000000000000ac RSI: 0000000000000000 RDI: 0000000000000560
[ 1035.713720] RBP: 00000000ffffffef R08: fffffbfff0d3b881 R09: fffffbfff0d3b881
[ 1035.713720] R10: 0000000000000001 R11: fffffbfff0d3b880 R12: 0000000000000000
[ 1035.768776] R13: 0000607ee460b900 R14: ffff88810dcb7690 R15: ffff88810dcb7698
[ 1035.777709] FS: 00007f02095fc980(0000) GS:ffff88811b400000(0000) knlGS:0000000000000000
[ 1035.777709] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1035.777709] CR2: 00007ffdf01d2f28 CR3: 0000000108258000 CR4: 00000000001006e0
[ 1035.777709] Call Trace:
[ 1035.777709] ovs_vport_add+0x267/0x4f0 [openvswitch]
[ 1035.777709] new_vport+0x15/0x1e0 [openvswitch]
[ 1035.777709] ovs_vport_cmd_new+0x567/0xd10 [openvswitch]
[ 1035.777709] ? ovs_dp_cmd_dump+0x490/0x490 [openvswitch]
[ 1035.777709] ? __kmalloc+0x131/0x2e0
[ 1035.777709] ? genl_family_rcv_msg+0xa54/0x1030
[ 1035.777709] genl_family_rcv_msg+0x63a/0x1030
[ 1035.777709] ? genl_unregister_family+0x630/0x630
[ 1035.841681] ? debug_show_all_locks+0x2d0/0x2d0
[ ... ]

Fixes: cf124db566e6 ("net: Fix inconsistent teardown and release of private netdev state.")
Signed-off-by: Taehee Yoo <[email protected]>
Reviewed-by: Greg Rose <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

show more ...

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 269

Based on 1 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of ve

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 269

Based on 1 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of version 2 of the gnu general public license as
published by the free software foundation this program is
distributed in the hope that it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details you should have received a copy of the gnu general
public license along with this program if not write to the free
software foundation inc 51 franklin street fifth floor boston ma
02110 1301 usa

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-only

has been chosen to replace the boilerplate/reference in 21 file(s).

Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Alexios Zavras <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Reviewed-by: Richard Fontana <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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net: ovs: fix return type of ndo_start_xmit function

The method ndo_start_xmit() is defined as returning an 'netdev_tx_t',
which is a typedef for an enum type, so make sure the implementation in
thi

net: ovs: fix return type of ndo_start_xmit function

The method ndo_start_xmit() is defined as returning an 'netdev_tx_t',
which is a typedef for an enum type, so make sure the implementation in
this driver has returns 'netdev_tx_t' value, and change the function
return type to netdev_tx_t.

Found by coccinelle.

Signed-off-by: YueHaibing <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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net: ovs: remove unused hardirq.h

Preempt counter APIs have been split out, currently, hardirq.h just
includes irq_enter/exit APIs which are not used by openvswitch at all.

So, remove the unused ha

net: ovs: remove unused hardirq.h

Preempt counter APIs have been split out, currently, hardirq.h just
includes irq_enter/exit APIs which are not used by openvswitch at all.

So, remove the unused hardirq.h.

Signed-off-by: Yang Shi <[email protected]>
Acked-by: Pravin B Shelar <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: [email protected]
Signed-off-by: David S. Miller <[email protected]>

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openvswitch: do not propagate headroom updates to internal port

After commit 3a927bc7cf9d ("ovs: propagate per dp max headroom to
all vports") the need_headroom for the internal vport is updated
acc

openvswitch: do not propagate headroom updates to internal port

After commit 3a927bc7cf9d ("ovs: propagate per dp max headroom to
all vports") the need_headroom for the internal vport is updated
accordingly to the max needed headroom in its datapath.

That avoids the pskb_expand_head() costs when sending/forwarding
packets towards tunnel devices, at least for some scenarios.

We still require such copy when using the ovs-preferred configuration
for vxlan tunnels:

br_int
/ \
tap vxlan
(remote_ip:X)

br_phy
\
NIC

where the route towards the IP 'X' is via 'br_phy'.

When forwarding traffic from the tap towards the vxlan device, we
will call pskb_expand_head() in vxlan_build_skb() because
br-phy->needed_headroom is equal to tun->needed_headroom.

With this change we avoid updating the internal vport needed_headroom,
so that in the above scenario no head copy is needed, giving 5%
performance improvement in UDP throughput test.

As a trade-off, packets sent from the internal port towards a tunnel
device will now experience the head copy overhead. The rationale is
that the latter use-case is less relevant performance-wise.

Signed-off-by: Paolo Abeni <[email protected]>
Acked-by: Pravin B Shelar <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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net: Fix inconsistent teardown and release of private netdev state.

Network devices can allocate reasources and private memory using
netdev_ops->ndo_init(). However, the release of these resources

net: Fix inconsistent teardown and release of private netdev state.

Network devices can allocate reasources and private memory using
netdev_ops->ndo_init(). However, the release of these resources
can occur in one of two different places.

Either netdev_ops->ndo_uninit() or netdev->destructor().

The decision of which operation frees the resources depends upon
whether it is necessary for all netdev refs to be released before it
is safe to perform the freeing.

netdev_ops->ndo_uninit() presumably can occur right after the
NETDEV_UNREGISTER notifier completes and the unicast and multicast
address lists are flushed.

netdev->destructor(), on the other hand, does not run until the
netdev references all go away.

Further complicating the situation is that netdev->destructor()
almost universally does also a free_netdev().

This creates a problem for the logic in register_netdevice().
Because all callers of register_netdevice() manage the freeing
of the netdev, and invoke free_netdev(dev) if register_netdevice()
fails.

If netdev_ops->ndo_init() succeeds, but something else fails inside
of register_netdevice(), it does call ndo_ops->ndo_uninit(). But
it is not able to invoke netdev->destructor().

This is because netdev->destructor() will do a free_netdev() and
then the caller of register_netdevice() will do the same.

However, this means that the resources that would normally be released
by netdev->destructor() will not be.

Over the years drivers have added local hacks to deal with this, by
invoking their destructor parts by hand when register_netdevice()
fails.

Many drivers do not try to deal with this, and instead we have leaks.

Let's close this hole by formalizing the distinction between what
private things need to be freed up by netdev->destructor() and whether
the driver needs unregister_netdevice() to perform the free_netdev().

netdev->priv_destructor() performs all actions to free up the private
resources that used to be freed by netdev->destructor(), except for
free_netdev().

netdev->needs_free_netdev is a boolean that indicates whether
free_netdev() should be done at the end of unregister_netdevice().

Now, register_netdevice() can sanely release all resources after
ndo_ops->ndo_init() succeeds, by invoking both ndo_ops->ndo_uninit()
and netdev->priv_destructor().

And at the end of unregister_netdevice(), we invoke
netdev->priv_destructor() and optionally call free_netdev().

Signed-off-by: David S. Miller <[email protected]>

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openvswitch: Set internal device max mtu to ETH_MAX_MTU.

Commit 91572088e3fd ("net: use core MTU range checking in core net
infra") changed the openvswitch internal device to use the core net
infra

openvswitch: Set internal device max mtu to ETH_MAX_MTU.

Commit 91572088e3fd ("net: use core MTU range checking in core net
infra") changed the openvswitch internal device to use the core net
infra for controlling the MTU range, but failed to actually set the
max_mtu as described in the commit message, which now defaults to
ETH_DATA_LEN.

This patch fixes this by setting max_mtu to ETH_MAX_MTU after
ether_setup() call.

Fixes: 91572088e3fd ("net: use core MTU range checking in core net infra")
Signed-off-by: Jarno Rajahalme <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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net: make ndo_get_stats64 a void function

The network device operation for reading statistics is only called
in one place, and it ignores the return value. Having a structure
return value is potenti

net: make ndo_get_stats64 a void function

The network device operation for reading statistics is only called
in one place, and it ignores the return value. Having a structure
return value is potentially confusing because some future driver could
incorrectly assume that the return value was used.

Fix all drivers with ndo_get_stats64 to have a void function.

Signed-off-by: Stephen Hemminger <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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net: use core MTU range checking in core net infra

geneve:
- Merge __geneve_change_mtu back into geneve_change_mtu, set max_mtu
- This one isn't quite as straight-forward as others, could use some

net: use core MTU range checking in core net infra

geneve:
- Merge __geneve_change_mtu back into geneve_change_mtu, set max_mtu
- This one isn't quite as straight-forward as others, could use some
closer inspection and testing

macvlan:
- set min/max_mtu

tun:
- set min/max_mtu, remove tun_net_change_mtu

vxlan:
- Merge __vxlan_change_mtu back into vxlan_change_mtu
- Set max_mtu to IP_MAX_MTU and retain dynamic MTU range checks in
change_mtu function
- This one is also not as straight-forward and could use closer inspection
and testing from vxlan folks

bridge:
- set max_mtu of IP_MAX_MTU and retain dynamic MTU range checks in
change_mtu function

openvswitch:
- set min/max_mtu, remove internal_dev_change_mtu
- note: max_mtu wasn't checked previously, it's been set to 65535, which
is the largest possible size supported

sch_teql:
- set min/max_mtu (note: max_mtu previously unchecked, used max of 65535)

macsec:
- min_mtu = 0, max_mtu = 65535

macvlan:
- min_mtu = 0, max_mtu = 65535

ntb_netdev:
- min_mtu = 0, max_mtu = 65535

veth:
- min_mtu = 68, max_mtu = 65535

8021q:
- min_mtu = 0, max_mtu = 65535

CC: [email protected]
CC: Nicolas Dichtel <[email protected]>
CC: Hannes Frederic Sowa <[email protected]>
CC: Tom Herbert <[email protected]>
CC: Daniel Borkmann <[email protected]>
CC: Alexander Duyck <[email protected]>
CC: Paolo Abeni <[email protected]>
CC: Jiri Benc <[email protected]>
CC: WANG Cong <[email protected]>
CC: Roopa Prabhu <[email protected]>
CC: Pravin B Shelar <[email protected]>
CC: Sabrina Dubroca <[email protected]>
CC: Patrick McHardy <[email protected]>
CC: Stephen Hemminger <[email protected]>
CC: Pravin Shelar <[email protected]>
CC: Maxim Krasnyansky <[email protected]>
Signed-off-by: Jarod Wilson <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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openvswitch: add NETIF_F_HW_VLAN_STAG_TX to internal dev

The internal device does support 802.1AD offloading since 018c1dda5ff1
("openvswitch: 802.1AD Flow handling, actions, vlan parsing, netlink
a

openvswitch: add NETIF_F_HW_VLAN_STAG_TX to internal dev

The internal device does support 802.1AD offloading since 018c1dda5ff1
("openvswitch: 802.1AD Flow handling, actions, vlan parsing, netlink
attributes").

Signed-off-by: Jiri Benc <[email protected]>
Acked-by: Pravin B Shelar <[email protected]>
Acked-by: Eric Garver <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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OVS: Ignore negative headroom value

net_device->ndo_set_rx_headroom (introduced in
871b642adebe300be2e50aa5f65a418510f636ec) says

"Setting a negtaive value reset the rx headroom
to the default

OVS: Ignore negative headroom value

net_device->ndo_set_rx_headroom (introduced in
871b642adebe300be2e50aa5f65a418510f636ec) says

"Setting a negtaive value reset the rx headroom
to the default value".

It seems that the OVS implementation in
3a927bc7cf9d0fbe8f4a8189dd5f8440228f64e7 overlooked this and sets
dev->needed_headroom unconditionally.

This doesn't have an immediate effect, but can mess up later
LL_RESERVED_SPACE calculations, such as done in
net/ipv6/mcast.c:mld_newpack. For reference, this issue was found
from a skb_panic raised there after the length calculations had given
the wrong result.

Note the other current users of this interface
(drivers/net/tun.c:tun_set_headroom and
drivers/net/veth.c:veth_set_rx_headroom) are both checking this
correctly thus need no modification.

Thanks to Ben for some pointers from the crash dumps!

Cc: Benjamin Poirier <[email protected]>
Cc: Paolo Abeni <[email protected]>
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1361414
Signed-off-by: Ian Wienand <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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