Jakub Sitnicki 695c12147a bpf, netns: Keep attached programs in bpf_prog_array ... Prepare for having multi-prog attachments for new netns attach types by storing programs to run in a bpf_prog_array, which is well suited for iterating over programs and running them in sequence. After this change bpf(PROG_QUERY) may block to allocate memory in bpf_prog_array_copy_to_user() for collected program IDs. This forces a change in how we protect access to the attached program in the query callback. Because bpf_prog_array_copy_to_user() can sleep, we switch from an RCU read lock to holding a mutex that serializes updaters. Because we allow only one BPF flow_dissector program to be attached to netns at all times, the bpf_prog_array pointed by net->bpf.run_array is always either detached (null) or one element long. No functional changes intended. Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20200625141357.910330-3-jakub@cloudflare.com		2020-06-30 10:45:08 -07:00
..
Makefile	ethtool: move to its own directory	2019-12-12 17:07:05 -08:00
bpf_sk_storage.c	bpf: Implement CAP_BPF	2020-05-15 17:29:41 +02:00
datagram.c	net: use indirect call wrappers for skb_copy_datagram_iter()	2020-03-25 11:30:40 -07:00
datagram.h	…
dev.c	net: increment xmit_recursion level in dev_direct_xmit()	2020-06-18 20:47:15 -07:00
dev_addr_lists.c	net: change addr_list_lock back to static key	2020-06-09 12:59:45 -07:00
dev_ioctl.c	ethtool: add timestamping related string sets	2020-03-29 22:32:36 -07:00
devlink.c	devlink: Add ACL control packet traps	2020-06-01 11:49:23 -07:00
drop_monitor.c	net: Add MODULE_DESCRIPTION entries to network modules	2020-06-20 21:33:57 -07:00
dst.c	net/dst: use a smaller percpu_counter batch for dst entries accounting	2020-05-08 21:33:33 -07:00
dst_cache.c	…
failover.c	…
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	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf	2020-06-13 15:28:08 -07:00
flow_dissector.c	bpf, netns: Keep attached programs in bpf_prog_array	2020-06-30 10:45:08 -07:00
flow_offload.c	net: flow_offload: fix flow_indr_dev_unregister path	2020-06-19 20:12:58 -07:00
gen_estimator.c	net_sched: gen_estimator: extend packet counter to 64bit	2019-11-06 21:51:36 -08:00
gen_stats.c	docs: networking: convert gen_stats.txt to ReST	2020-04-28 14:39:46 -07:00
gro_cells.c	…
hwbm.c	net: hwbm: Make the hwbm_pool lock a mutex	2019-06-09 19:40:10 -07:00
link_watch.c	net: Add IF_OPER_TESTING	2020-04-20 12:43:24 -07:00
lwt_bpf.c	net: add net available in build_state	2020-03-29 22:30:57 -07:00
lwtunnel.c	net: ipv6: add rpl sr tunnel	2020-03-29 22:30:57 -07:00
neighbour.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-05-31 17:48:46 -07:00
net-procfs.c	net: procfs: use index hashlist instead of name hashlist	2019-10-01 14:47:19 -07:00
net-sysfs.c	net: core: recursively find netdev by device node	2020-05-15 10:18:49 -07:00
net-sysfs.h	net-sysfs: add netdev_change_owner()	2020-02-26 20:07:25 -08:00
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	nsproxy: add struct nsset	2020-05-09 13:57:12 +02:00
netclassid_cgroup.c	cgroup, netclassid: remove double cond_resched	2020-04-21 15:44:30 -07:00
netevent.c	…
netpoll.c	netpoll: accept NULL np argument in netpoll_send_skb()	2020-05-07 18:11:07 -07:00
netprio_cgroup.c	netprio_cgroup: Fix unlimited memory leak of v2 cgroups	2020-05-09 20:59:21 -07:00
page_pool.c	net: page pool: allow to pass zero flags to page_pool_init()	2020-03-29 21:49:20 -07:00
pktgen.c	docs: networking: convert pktgen.txt to ReST	2020-04-30 12:56:37 -07:00
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: change addr_list_lock back to static key	2020-06-09 12:59:45 -07:00
scm.c	net: ignore sock_from_file errors in __scm_install_fd	2020-05-13 12:30:54 -07:00
secure_seq.c	crypto: lib/sha1 - remove unnecessary includes of linux/cryptohash.h	2020-05-08 15:32:17 +10:00
skbuff.c	net: unexport skb_gro_receive()	2020-05-19 19:55:36 -07:00
skmsg.c	bpf, sockmap: RCU dereferenced psock may be used outside RCU block	2020-06-28 08:33:28 -07:00
sock.c	net: increment xmit_recursion level in dev_direct_xmit()	2020-06-18 20:47:15 -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: Fix memlock accounting for sock_hash	2020-06-12 15:21:29 -07:00
sock_reuseport.c	net: Generate reuseport group ID on group creation	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	Merge branch 'work.sysctl' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2020-06-10 16:05:54 -07:00
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	xdp: Handle frame_sz in xdp_convert_zc_to_xdp_frame()	2020-06-17 09:58:15 -07:00