linux/net/core
Shakeel Butt d752a49865 net: memcg: late association of sock to memcg
If a TCP socket is allocated in IRQ context or cloned from unassociated
(i.e. not associated to a memcg) in IRQ context then it will remain
unassociated for its whole life. Almost half of the TCPs created on the
system are created in IRQ context, so, memory used by such sockets will
not be accounted by the memcg.

This issue is more widespread in cgroup v1 where network memory
accounting is opt-in but it can happen in cgroup v2 if the source socket
for the cloning was created in root memcg.

To fix the issue, just do the association of the sockets at the accept()
time in the process context and then force charge the memory buffer
already used and reserved by the socket.

Signed-off-by: Shakeel Butt <shakeelb@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-10 15:33:05 -07:00
..
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.c net: Fix Tx hash bound checking 2020-02-26 11:14:10 -08:00
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
devlink.c devlink: validate length of region addr/len 2020-03-03 13:28:48 -08:00
drop_monitor.c drop_monitor: Do not cancel uninitialized work item 2020-02-07 18:48:36 +01:00
dst.c net: print proper warning on dst underflow 2019-09-26 09:05:56 +02:00
dst_cache.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
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_rules: Correctly set table field when table number exceeds 8 bits 2020-02-16 18:38:24 -08:00
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-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
net_namespace.c netns: Constify exported functions 2020-01-17 13:25:24 +01:00
netclassid_cgroup.c cgroup, netclassid: periodically release file_lock on classid updating 2020-03-09 18:13:39 -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: rtnetlink: fix bugs in rtnl_alt_ifname() 2020-02-16 18:51:59 -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: core: Distribute switch variables for initialization 2020-02-20 10:00:19 -08:00
skmsg.c net, sk_msg: Don't check if sock is locked when tearing down psock 2020-01-22 20:30:20 +01:00
sock.c net: memcg: late association of sock to memcg 2020-03-10 15:33:05 -07:00
sock_diag.c sock: make cookie generation global instead of per netns 2019-08-09 13:14:46 -07:00
sock_map.c bpf, sockhash: Synchronize_rcu before free'ing map 2020-02-07 22:36:26 +01:00
sock_reuseport.c soreuseport: Cleanup duplicate initialization of more_reuse->max_socks. 2020-01-27 11:01:16 +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