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c1cdf65da060a8e047a9f4433306fd6dac1f51a6
linux/net/core
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Jakub Sitnicki c1cdf65da0 bpf, sockmap: Return socket cookie on lookup from syscall 
Tooling that populates the SOCK{MAP,HASH} with sockets from user-space
needs a way to inspect its contents. Returning the struct sock * that the
map holds to user-space is neither safe nor useful. An approach established
by REUSEPORT_SOCKARRAY is to return a socket cookie (a unique identifier)
instead.

Since socket cookies are u64 values, SOCK{MAP,HASH} need to support such a
value size for lookup to be possible. This requires special handling on
update, though. Attempts to do a lookup on a map holding u32 values will be
met with ENOSPC error.

Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20200218171023.844439-7-jakub@cloudflare.com
2020-02-21 22:29:45 +01:00
..
bpf_sk_storage.c
bpf: Improve bucket_log calculation logic
2020-02-07 23:01:41 +01:00
datagram.c
net: add queue argument to __skb_wait_for_more_packets and __skb_{,try_}recv_datagram
2019-12-09 09:59:07 +01:00
datagram.h
net/core: Allow the compiler to verify declaration and definition consistency
2019-03-27 13:49:44 -07:00
dev_addr_lists.c
net: remove unnecessary variables and callback
2019-10-24 14:53:49 -07:00
dev_ioctl.c
net: Introduce peer to peer one step PTP time stamping.
2019-12-25 19:51:34 -08:00
dev.c
core: Don't skip generic XDP program execution for cloned SKBs
2020-02-11 17:01:29 -08:00
devlink.c
devlink: report 0 after hitting end in region read
2020-02-05 14:23:20 +01:00
drop_monitor.c
drop_monitor: Do not cancel uninitialized work item
2020-02-07 18:48:36 +01:00
dst_cache.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
dst.c
net: print proper warning on dst underflow
2019-09-26 09:05:56 +02:00
failover.c
failover: allow name change on IFF_UP slave interfaces
2019-04-10 22:12:26 -07:00
fib_notifier.c
net: fib_notifier: propagate extack down to the notifier block callback
2019-10-04 11:10:56 -07:00
fib_rules.c
net: fib_notifier: propagate extack down to the notifier block callback
2019-10-04 11:10:56 -07:00
filter.c
treewide: remove redundant IS_ERR() before error code check
2020-02-04 03:05:27 +00:00
flow_dissector.c
flow_dissector: Fix to use new variables for port ranges in bpf hook
2020-01-27 11:25:07 +01:00
flow_offload.c
net: core: rename indirect block ingress cb function
2019-12-06 20:45:09 -08:00
gen_estimator.c
net_sched: gen_estimator: extend packet counter to 64bit
2019-11-06 21:51:36 -08:00
gen_stats.c
net_sched: add TCA_STATS_PKT64 attribute
2019-11-05 18:20:55 -08:00
gro_cells.c
gro_cells: make sure device is up in gro_cells_receive()
2019-03-10 11:07:14 -07:00
hwbm.c
net: hwbm: Make the hwbm_pool lock a mutex
2019-06-09 19:40:10 -07:00
link_watch.c
net: link_watch: prevent starvation when processing linkwatch wq
2019-07-01 19:02:47 -07:00
lwt_bpf.c
net: ipv6_stub: use ip6_dst_lookup_flow instead of ip6_dst_lookup
2019-12-04 12:27:13 -08:00
lwtunnel.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
Makefile
ethtool: move to its own directory
2019-12-12 17:07:05 -08:00
neighbour.c
neigh_stat_seq_next() should increase position index
2020-01-24 11:42:18 +01:00
net_namespace.c
netns: Constify exported functions
2020-01-17 13:25:24 +01:00
net-procfs.c
net: procfs: use index hashlist instead of name hashlist
2019-10-01 14:47:19 -07:00
net-sysfs.c
net-sysfs: Call dev_hold always in rx_queue_add_kobject
2019-12-17 22:57:11 -08:00
net-sysfs.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
net-traces.c
page_pool: add tracepoints for page_pool with details need by XDP
2019-06-19 11:23:13 -04:00
netclassid_cgroup.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
netevent.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
netpoll.c
net: fix skb use after free in netpoll
2019-08-27 20:52:02 -07:00
netprio_cgroup.c
netprio: use css ID instead of cgroup ID
2019-11-12 08:18:03 -08:00
page_pool.c
page_pool: refill page when alloc.count of pool is zero
2020-02-13 14:11:51 -08:00
pktgen.c
proc: convert everything to "struct proc_ops"
2020-02-04 03:05:26 +00:00
ptp_classifier.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295
2019-06-05 17:36:38 +02:00
request_sock.c
tcp: add rcu protection around tp->fastopen_rsk
2019-10-13 10:13:08 -07:00
rtnetlink.c
net: bridge: teach ndo_dflt_bridge_getlink() more brport flags
2020-02-17 14:36:40 -08:00
scm.c
y2038: socket: remove timespec reference in timestamping
2019-11-15 14:38:29 +01:00
secure_seq.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
skbuff.c
net: Support GRO/GSO fraglist chaining.
2020-01-27 11:00:21 +01:00
skmsg.c
net, sk_msg: Clear sk_user_data pointer on clone if tagged
2020-02-21 22:29:45 +01:00
sock_diag.c
sock: make cookie generation global instead of per netns
2019-08-09 13:14:46 -07:00
sock_map.c
bpf, sockmap: Return socket cookie on lookup from syscall
2020-02-21 22:29:45 +01:00
sock_reuseport.c
soreuseport: Cleanup duplicate initialization of more_reuse->max_socks.
2020-01-27 11:01:16 +01:00
sock.c
net, sk_msg: Clear sk_user_data pointer on clone if tagged
2020-02-21 22:29:45 +01:00
stream.c
tcp: make sure EPOLLOUT wont be missed
2019-08-19 13:07:43 -07:00
sysctl_net_core.c
net, sysctl: Fix compiler warning when only cBPF is present
2019-12-19 17:17:51 +01:00
timestamping.c
net: Introduce a new MII time stamping interface.
2019-12-25 19:51:33 -08:00
tso.c
net: Use skb accessors in network core
2019-07-22 20:47:56 -07:00
utils.c
net: Fix skb->csum update in inet_proto_csum_replace16().
2020-01-24 20:54:30 +01:00
xdp.c
treewide: Use sizeof_field() macro
2019-12-09 10:36:44 -08:00