Toke Høiland-Jørgensen 92234c8f15 xdp: Support specifying expected existing program when attaching XDP ... While it is currently possible for userspace to specify that an existing XDP program should not be replaced when attaching to an interface, there is no mechanism to safely replace a specific XDP program with another. This patch adds a new netlink attribute, IFLA_XDP_EXPECTED_FD, which can be set along with IFLA_XDP_FD. If set, the kernel will check that the program currently loaded on the interface matches the expected one, and fail the operation if it does not. This corresponds to a 'cmpxchg' memory operation. Setting the new attribute with a negative value means that no program is expected to be attached, which corresponds to setting the UPDATE_IF_NOEXIST flag. A new companion flag, XDP_FLAGS_REPLACE, is also added to explicitly request checking of the EXPECTED_FD attribute. This is needed for userspace to discover whether the kernel supports the new attribute. Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Reviewed-by: Jakub Kicinski <kuba@kernel.org> Link: https://lore.kernel.org/bpf/158515700640.92963.3551295145441017022.stgit@toke.dk		2020-03-28 14:24:41 -07:00
..
6lowpan	6lowpan: no need to check return value of debugfs_create functions	2019-07-06 12:50:01 +02:00
9p	9p pull request for inclusion in 5.4	2019-09-27 15:10:34 -07:00
802	net: 802: psnap.c: Use built-in RCU list checking	2020-02-24 13:02:53 -08:00
8021q	net: vlan: suppress "failed to kill vid" warnings	2020-02-17 14:30:54 -08:00
appletalk	appletalk: enforce CAP_NET_RAW for raw sockets	2019-09-24 16:37:18 +02:00
atm	proc: convert everything to "struct proc_ops"	2020-02-04 03:05:26 +00:00
ax25	net: Make sock protocol value checks more specific	2020-01-09 18:41:40 -08:00
batman-adv	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-03-12 22:34:48 -07:00
bluetooth	Bluetooth: Fix race condition in hci_release_sock()	2020-01-26 10:34:17 +02:00
bpf	bpf: Fix build warning regarding missing prototypes	2020-03-28 18:13:18 +01:00
bpfilter	kbuild: rename hostprogs-y/always to hostprogs/always-y	2020-02-04 01:53:07 +09:00
bridge	net: bridge: fix stale eth hdr pointer in br_dev_xmit	2020-02-24 11:11:19 -08:00
caif	net: caif: Add lockdep expression to RCU traversal primitive	2020-03-11 22:55:25 -07:00
can	can: j1939: j1939_sk_bind(): take priv after lock is held	2019-12-08 11:52:02 +01:00
ceph	Merge branch 'merge.nfs-fs_parse.1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2020-02-08 13:26:41 -08:00
core	xdp: Support specifying expected existing program when attaching XDP	2020-03-28 14:24:41 -07:00
dcb	…
dccp	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2020-02-29 15:53:35 -08:00
decnet	net: Make sock protocol value checks more specific	2020-01-09 18:41:40 -08:00
dns_resolver	Revert "Merge tag 'keys-acl-20190703' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs"	2019-07-10 18:43:43 -07:00
dsa	net: dsa: warn if phylink_mac_link_state returns error	2020-03-15 17:11:12 -07:00
ethernet	net: remove eth_change_mtu	2020-01-27 11:09:31 +01:00
ethtool	ethtool: fix spelling mistake "exceeeds" -> "exceeds"	2020-03-13 11:23:33 -07:00
hsr	hsr: fix refcnt leak of hsr slave interface	2020-03-05 11:59:47 -08:00
ieee802154	nl802154: add missing attribute validation for dev_type	2020-03-03 13:28:48 -08:00
ife	net: Fix Kconfig indentation	2019-09-26 08:56:17 +02:00
ipv4	bpf: Add bpf_sk_storage support to bpf_tcp_ca	2020-03-23 20:51:55 +01:00
ipv6	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-03-12 22:34:48 -07:00
iucv	treewide: Use sizeof_field() macro	2019-12-09 10:36:44 -08:00
kcm	net: kcm: kcmproc.c: Fix RCU list suspicious usage warning	2020-03-16 17:14:02 -07:00
key	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-07-08 19:48:57 -07:00
l2tp	l2tp: Replace zero-length array with flexible-array member	2020-02-28 12:08:37 -08:00
l3mdev	…
lapb	…
llc	af_llc: fix if-statement empty body warning	2020-02-26 20:38:13 -08:00
mac80211	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-03-12 22:34:48 -07:00
mac802154	…
mpls	net: mpls: Replace zero-length array with flexible-array member	2020-02-28 12:08:37 -08:00
mptcp	mptcp: drop unneeded checks	2020-03-15 00:19:03 -07:00
ncsi	net/ncsi: Support for multi host mellanox card	2020-01-09 18:36:22 -08:00
netfilter	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-03-12 22:34:48 -07:00
netlabel	netlabel_domainhash.c: Use built-in RCU list checking	2020-02-18 12:44:23 -08:00
netlink	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-03-12 22:34:48 -07:00
netrom	net: netrom: Add missing annotation for nr_neigh_stop()	2020-02-24 13:26:49 -08:00
nfc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-03-12 22:34:48 -07:00
nsh	…
openvswitch	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-03-12 22:34:48 -07:00
packet	net/packet: tpacket_rcv: do not increment ring index on drop	2020-03-11 23:12:16 -07:00
phonet	net: Remove redundant BUG_ON() check in phonet_pernet	2020-01-03 12:25:50 -08:00
psample	net: psample: fix skb_over_panic	2019-11-26 14:40:13 -08:00
qrtr	net: qrtr: Fix FIXME related to qrtr_ns_init()	2020-03-03 17:52:21 -08:00
rds	net/rds: Track user mapped pages through special API	2020-02-16 18:37:09 -08:00
rfkill	rfkill: Fix incorrect check to avoid NULL pointer dereference	2019-12-16 10:15:49 +01:00
rose	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-01-26 10:40:21 +01:00
rxrpc	rxrpc: Fix call RCU cleanup using non-bh-safe locks	2020-02-07 11:20:57 +01:00
sched	net: sched: set the hw_stats_type in pedit loop	2020-03-16 02:13:43 -07:00
sctp	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-03-12 22:34:48 -07:00
smc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-03-12 22:34:48 -07:00
strparser	…
sunrpc	xprtrdma: Fix DMA scatter-gather list mapping imbalance	2020-02-13 15:35:33 -05:00
switchdev	net: switchdev: do not propagate bridge updates across bridges	2020-02-26 20:58:33 -08:00
tipc	tipc: add NULL pointer check to prevent kernel oops	2020-03-15 00:07:00 -07:00
tls	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2020-02-21 15:22:45 -08:00
unix	net: datagram: drop 'destructor' argument from several helpers	2020-02-28 12:12:53 -08:00
vmw_vsock	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-02-27 18:31:39 -08:00
wimax	wimax: no need to check return value of debugfs_create functions	2019-08-10 15:25:47 -07:00
wireless	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-03-12 22:34:48 -07:00
x25	net: x25: convert to list_for_each_entry_safe()	2020-02-16 18:59:42 -08:00
xdp	xdp: Replace zero-length array with flexible-array member	2020-02-28 12:08:37 -08:00
xfrm	net: datagram: drop 'destructor' argument from several helpers	2020-02-28 12:12:53 -08:00
Kconfig	net: disable BRIDGE_NETFILTER by default	2020-02-20 15:02:02 -08:00
Makefile	mptcp: Add MPTCP socket stubs	2020-01-24 13:44:07 +01:00
compat.c	y2038: socket: use __kernel_old_timespec instead of timespec	2019-11-15 14:38:29 +01:00
socket.c	socket: fix unused-function warning	2020-01-08 15:02:21 -08:00
sysctl_net.c	…