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Eric Garver e7bc7db9ba net: openvswitch: add explicit drop action 
From: Eric Garver <eric@garver.life>

This adds an explicit drop action. This is used by OVS to drop packets
for which it cannot determine what to do. An explicit action in the
kernel allows passing the reason _why_ the packet is being dropped or
zero to indicate no particular error happened (i.e: OVS intentionally
dropped the packet).

Since the error codes coming from userspace mean nothing for the kernel,
we squash all of them into only two drop reasons:
- OVS_DROP_EXPLICIT_WITH_ERROR to indicate a non-zero value was passed
- OVS_DROP_EXPLICIT to indicate a zero value was passed (no error)

e.g. trace all OVS dropped skbs

 # perf trace -e skb:kfree_skb --filter="reason >= 0x30000"
 [..]
 106.023 ping/2465 skb:kfree_skb(skbaddr: 0xffffa0e8765f2000, \
  location:0xffffffffc0d9b462, protocol: 2048, reason: 196611)

reason: 196611 --> 0x30003 (OVS_DROP_EXPLICIT)

Also, this patch allows ovs-dpctl.py to add explicit drop actions as:
  "drop"     -> implicit empty-action drop
  "drop(0)"  -> explicit non-error action drop
  "drop(42)" -> explicit error action drop

Signed-off-by: Eric Garver <eric@garver.life>
Co-developed-by: Adrian Moreno <amorenoz@redhat.com>
Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2023-08-14 08:01:06 +01:00
..
6lowpan 6lowpan: Remove redundant initialisation. 2023-03-29 08:22:52 +01:00
9p net: annotate data-races around sock->ops 2023-08-09 15:32:43 -07:00
802 treewide: Convert del_timer*() to timer_shutdown*() 2022-12-25 13:38:09 -08:00
8021q Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-10 14:10:53 -07:00
appletalk sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
atm sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
ax25 sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
batman-adv batman-adv: Broken sync while rescheduling delayed work 2023-05-26 23:14:49 +02:00
bluetooth Bluetooth: hci_conn: avoid checking uninitialized CIG/CIS ids 2023-08-11 11:57:54 -07:00
bpf page_pool: split types and declarations from page_pool.h 2023-08-07 13:05:19 -07:00
bpfilter net: Use umd_cleanup_helper() 2023-05-31 13:06:57 +02:00
bridge bridge: Remove unused declaration br_multicast_set_hash_max() 2023-07-27 17:11:29 -07:00
caif sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
can net: annotate data-races around sk->sk_mark 2023-07-29 18:13:41 +01:00
ceph libceph: fix potential hang in ceph_osdc_notify() 2023-08-02 09:07:34 +02:00
core Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-10 14:10:53 -07:00
dcb net: dcb: choose correct policy to parse DCB_ATTR_BCN 2023-08-01 21:07:46 -07:00
dccp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-10 14:10:53 -07:00
devlink devlink: clear flag on port register error path 2023-08-09 13:06:21 -07:00
dns_resolver
…
dsa net: dsa: mark parsed interface mode for legacy switch drivers 2023-08-09 13:08:09 -07:00
ethernet net: ethernet: use sysfs_emit() to instead of scnprintf() 2022-12-07 20:02:44 -08:00
ethtool net: transfer rtnl_lock() requirement from ethtool_set_ethtool_phy_ops() to caller 2023-08-02 19:11:06 -07:00
handshake net/handshake: Trace events for TLS Alert helpers 2023-07-28 14:07:59 -07:00
hsr net/hsr: Remove unused function declarations 2023-07-31 20:11:47 -07:00
ieee802154 sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
ife
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ipv4 net: factor out __inet_listen_sk() helper 2023-08-14 07:06:13 +01:00
ipv6 net: factor out inet{,6}_bind_sk helpers 2023-08-14 07:06:13 +01:00
iucv net/iucv: Fix size of interrupt data 2023-03-16 17:34:40 -07:00
kcm sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
key ipsec-next-2023-07-19 2023-07-19 20:36:16 -07:00
l2tp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-03 14:34:37 -07:00
l3mdev
…
lapb
…
llc net/llc/llc_conn.c: fix 4 instances of -Wmissing-variable-declarations 2023-08-09 15:34:28 -07:00
mac80211 - New Drivers 2023-07-03 11:26:05 -07:00
mac802154 Core WPAN changes: 2023-06-24 15:41:46 -07:00
mctp sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
mpls net: move gso declarations and functions to their own files 2023-06-10 00:11:41 -07:00
mptcp mptcp: Remove unnecessary test for __mptcp_init_sock() 2023-08-14 07:06:14 +01:00
ncsi net/ncsi: change from ndo_set_mac_address to dev_set_mac_address 2023-06-09 10:32:51 +01:00
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-10 14:10:53 -07:00
netlabel netlabel: Remove unused declaration netlbl_cipsov4_doi_free() 2023-08-02 12:28:22 -07:00
netlink netlink: convert nlk->flags to atomic flags 2023-08-13 12:23:19 +01:00
netrom sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
nfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-06-27 09:45:22 -07:00
nsh net: move gso declarations and functions to their own files 2023-06-10 00:11:41 -07:00
openvswitch net: openvswitch: add explicit drop action 2023-08-14 08:01:06 +01:00
packet Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-10 14:10:53 -07:00
phonet sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
psample
…
qrtr net: qrtr: Handle IPCR control port format of older targets 2023-07-17 09:02:30 +01:00
rds net/rds: Remove unused function declarations 2023-08-13 12:25:42 +01:00
rfkill net: rfkill-gpio: Add explicit include for of.h 2023-04-06 20:36:27 +02:00
rose sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
rxrpc Networking changes for 6.5. 2023-06-28 16:43:10 -07:00
sched net/sched: taprio: dump class stats for the actual q->qdiscs[] 2023-08-09 15:59:21 -07:00
sctp ipv6: remove hard coded limitation on ipv6_pinfo 2023-07-24 09:39:31 +01:00
smc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-10 14:10:53 -07:00
strparser
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sunrpc SUNRPC: Use new helpers to handle TLS Alerts 2023-07-28 14:07:59 -07:00
switchdev net: switchdev: Add a helper to replay objects on a bridge port 2023-07-21 08:54:03 +01:00
tipc tipc: Remove unused declaration tipc_link_build_bc_sync_msg() 2023-08-09 13:03:14 -07:00
tls Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-10 14:10:53 -07:00
unix net: annotate data-races around sock->ops 2023-08-09 15:32:43 -07:00
vmw_vsock vsock: Remove unused function declarations 2023-07-31 14:41:08 -07:00
wireless wifi: nl80211: fix integer overflow in nl80211_parse_mbssid_elems() 2023-08-09 14:43:35 +02:00
x25 sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
xdp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-10 14:10:53 -07:00
xfrm Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-03 14:34:37 -07:00
Kconfig bpf: Add fd-based tcx multi-prog infra with link support 2023-07-19 10:07:27 -07:00
Kconfig.debug
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Makefile net/handshake: Create a NETLINK service for handling handshake requests 2023-04-19 18:48:48 -07:00
compat.c net/compat: Update msg_control_is_user when setting a kernel pointer 2023-04-14 11:09:27 +01:00
devres.c
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socket.c net: annotate data-races around sock->ops 2023-08-09 15:32:43 -07:00
sysctl_net.c
…