twx-linux/include/net
Sebastian Urban e231034377 Bluetooth: compute LE flow credits based on recvbuf space
[ Upstream commit ce60b9231b66710b6ee24042ded26efee120ecfc ]

Previously LE flow credits were returned to the
sender even if the socket's receive buffer was
full. This meant that no back-pressure
was applied to the sender, thus it continued to
send data, resulting in data loss without any
error being reported. Furthermore, the amount
of credits was essentially fixed to a small
amount, leading to reduced performance.

This is fixed by computing the number of returned
LE flow credits based on the estimated available
space in the receive buffer of an L2CAP socket.
Consequently, if the receive buffer is full, no
credits are returned until the buffer is read and
thus cleared by user-space.

Since the computation of available receive buffer
space can only be performed approximately (due to
sk_buff overhead) and the receive buffer size may
be changed by user-space after flow credits have
been sent, superfluous received data is temporary
stored within l2cap_pinfo. This is necessary
because Bluetooth LE provides no retransmission
mechanism once the data has been acked by the
physical layer.

If receive buffer space estimation is not possible
at the moment, we fall back to providing credits
for one full packet as before. This is currently
the case during connection setup, when MPS is not
yet available.

Fixes: b1c325c23d75 ("Bluetooth: Implement returning of LE L2CAP credits")
Signed-off-by: Sebastian Urban <surban@surban.net>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-06-12 11:11:55 +02:00
..
9p 9p: Add additional debug flags and open modes 2023-03-27 02:33:48 +00:00
bluetooth Bluetooth: compute LE flow credits based on recvbuf space 2024-06-12 11:11:55 +02:00
caif net: caif: Remove unused declaration cfsrvl_ctrlcmd() 2023-08-10 18:24:48 -07:00
iucv
mana net: mana: Fix Rx DMA datasize and skb_over_panic 2024-04-10 16:35:49 +02:00
netfilter netfilter: flowtable: validate pppoe header 2024-04-27 17:11:31 +02:00
netns xfrm: fix a data-race in xfrm_gen_index() 2023-09-13 09:20:28 +02:00
nfc
page_pool page_pool: fix documentation typos 2023-10-04 14:22:27 -07:00
phonet net: ioctl: Use kernel memory on protocol ioctl callbacks 2023-06-15 22:33:26 -07:00
sctp sctp: Remove unused declaration sctp_backlog_migrate() 2023-08-10 19:31:52 -07:00
tc_act net: sched: do not offload flows with a helper in act_ct 2023-11-28 17:19:54 +00:00
6lowpan.h
act_api.h net/sched: Rename user cookie and act cookie 2023-02-20 16:46:10 -08:00
addrconf.h ipv6: fix race condition between ipv6_get_ifaddr and ipv6_del_addr 2024-04-17 11:19:29 +02:00
af_ieee802154.h
af_rxrpc.h rxrpc: Fix timeout of a call that hasn't yet been granted a channel 2023-05-01 07:43:19 +01:00
af_unix.h af_unix: Suppress false-positive lockdep splat for spin_lock() in __unix_gc(). 2024-05-02 16:32:40 +02:00
af_vsock.h virtio/vsock: send credit update during setting SO_RCVLOWAT 2024-01-25 15:35:26 -08:00
ah.h
amt.h
arp.h neighbour: switch to standard rcu, instead of rcu_bh 2023-03-21 21:32:18 -07:00
atmclip.h
ax25.h ax25: Use kernel universal linked list to implement ax25_dev_list 2024-06-12 11:11:54 +02:00
ax88796.h
bareudp.h
bond_3ad.h bonding: 3ad: Remove unused declaration bond_3ad_update_lacp_active() 2023-07-28 18:06:30 -07:00
bond_alb.h bonding (gcc13): synchronize bond_{a,t}lb_xmit() types 2022-11-02 20:38:13 -07:00
bond_options.h
bonding.h bonding: fix macvlan over alb bond support 2023-08-24 10:07:13 +02:00
bpf_sk_storage.h
busy_poll.h net: invert the netdevice.h vs xdp.h dependency 2023-08-03 08:38:07 -07:00
calipso.h
cfg80211-wext.h wifi: cfg80211: Avoid clashing function prototypes 2022-11-16 11:31:47 +02:00
cfg80211.h wifi: cfg80211: add a flag to disable wireless extensions 2024-04-03 15:28:54 +02:00
cfg802154.h mac802154: fix llsec key resources release in mac802154_llsec_key_del 2024-04-03 15:28:27 +02:00
checksum.h net: checksum: drop the linux/uaccess.h include 2023-01-27 11:19:46 +00:00
cipso_ipv4.h
cls_cgroup.h
codel_impl.h
codel_qdisc.h
codel.h codel: fix kernel-doc notation warnings 2023-07-14 20:39:29 -07:00
compat.h
datalink.h net: datalink: Remove unused declarations 2023-07-27 17:17:32 -07:00
dcbevent.h
dcbnl.h net: dcb: add helper functions to retrieve PCP and DSCP rewrite maps 2023-01-20 09:33:22 +00:00
devlink.h devlink: Expose port function commands to control IPsec packet offloads 2023-08-27 17:08:45 -07:00
dropreason-core.h net: add skb_queue_purge_reason and __skb_queue_purge_reason 2023-08-19 15:30:15 +01:00
dropreason.h net: openvswitch: add last-action drop reason 2023-08-14 08:01:06 +01:00
dsa_stubs.h net: dsa: replace NETDEV_PRE_CHANGE_HWTSTAMP notifier with a stub 2023-04-09 15:35:49 +01:00
dsa.h net: dsa: remove legacy_pre_march2020 detection 2023-07-18 09:47:08 +02:00
dsfield.h
dst_cache.h
dst_metadata.h xfrm: interface: Add unstable helpers for setting/getting XFRM metadata from TC-BPF 2022-12-05 21:58:27 -08:00
dst_ops.h net: remove unnecessary input parameter 'how' in ifdown function 2023-08-22 13:19:02 +02:00
dst.h net: dst: Switch to rcuref_t reference counting 2023-03-28 18:52:28 -07:00
erspan.h
esp.h
espintcp.h
ethoc.h
failover.h
fib_notifier.h
fib_rules.h
firewire.h
flow_dissector.h net: flow_dissector: Add IPSEC dissector 2023-08-02 10:09:31 +01:00
flow_offload.h tc: flower: Enable offload support IPSEC SPI field. 2023-08-02 10:09:32 +01:00
flow.h inet: shrink struct flowi_common 2023-11-20 11:59:34 +01:00
fou.h bpf,fou: Add bpf_skb_{set,get}_fou_encap kfuncs 2023-04-12 16:40:39 -07:00
fq_impl.h wifi: mac80211: add support for restricting netdev features per vif 2022-12-01 15:09:10 +01:00
fq.h net: fq: Remove unused typedef fq_flow_get_default_t 2023-08-08 15:58:23 -07:00
garp.h
gen_stats.h
genetlink.h drop_monitor: Require 'CAP_SYS_ADMIN' when joining "events" group 2023-12-13 18:45:10 +01:00
geneve.h net: geneve: fix array of flexible structures warnings 2022-10-31 10:43:04 +00:00
gre.h
gro_cells.h
gro.h net: gro: fix udp bad offset in socket lookup by adding {inner_}network_offset to napi_gro_cb 2024-05-17 12:02:07 +02:00
gso.h net: move gso declarations and functions to their own files 2023-06-10 00:11:41 -07:00
gtp.h
gue.h
handshake.h net/handshake: Add helpers for parsing incoming TLS Alerts 2023-07-28 14:07:59 -07:00
hwbm.h
icmp.h
ieee80211_radiotap.h wifi: radiotap: fix kernel-doc notation warnings 2023-08-22 21:40:40 +02:00
ieee802154_netdev.h mac802154: Handle received BEACON_REQ 2023-03-23 21:51:30 +01:00
if_inet6.h net: ipv6: support reporting otherwise unknown prefix flags in RTM_NEWPREFIX 2023-12-20 17:01:45 +01:00
ife.h
inet6_connection_sock.h
inet6_hashtables.h net: Fix slab-out-of-bounds in inet[6]_steal_sock 2023-08-15 13:57:51 -07:00
inet_common.h net: factor out __inet_listen_sk() helper 2023-08-14 07:06:13 +01:00
inet_connection_sock.h tcp: properly terminate timers for kernel sockets 2024-04-10 16:35:42 +02:00
inet_dscp.h
inet_ecn.h
inet_frag.h inet: frags: eliminate kernel-doc warning 2023-07-14 20:39:29 -07:00
inet_hashtables.h net: Fix slab-out-of-bounds in inet[6]_steal_sock 2023-08-15 13:57:51 -07:00
inet_sock.h udp: fix busy polling 2024-01-31 16:19:01 -08:00
inet_timewait_sock.h tcp: Add TIME_WAIT sockets in bhash2. 2022-12-30 07:25:52 +00:00
inetpeer.h
ioam6.h
ip6_checksum.h
ip6_fib.h net/ipv6: Revert remove expired routes with a separated list of routes 2024-01-01 12:42:33 +00:00
ip6_route.h IPv6: add extack info for IPv6 address add/delete 2023-07-28 11:01:56 +01:00
ip6_tunnel.h
ip_fib.h ipv4/fib: send notify when delete source address routes 2023-10-03 09:00:40 +02:00
ip_tunnels.h geneve: fix header validation in geneve[6]_xmit_skb 2024-04-17 11:19:28 +02:00
ip_vs.h ipvs: Correct spelling in comments 2023-04-22 01:39:41 +02:00
ip.h ipmr: fix kernel panic when forwarding mcast packets 2024-02-05 20:14:35 +00:00
ipcomp.h xfrm: ipcomp: add extack to ipcomp{4,6}_init_state 2022-09-29 07:18:00 +02:00
ipconfig.h
ipv6_frag.h net: dropreason: add SKB_DROP_REASON_FRAG_REASM_TIMEOUT 2022-10-31 20:14:27 -07:00
ipv6_stubs.h bpf: Derive source IP addr via bpf_*_fib_lookup() 2024-03-01 13:35:04 +01:00
ipv6.h tcp: Fix bind() regression for v4-mapped-v6 wildcard address. 2023-09-13 07:18:04 +01:00
iw_handler.h wifi: wext: Remove unused declaration dev_get_wireless_info() 2023-08-22 21:40:40 +02:00
kcm.h kcm: Send multiple frags in one sendmsg() 2023-06-12 21:13:23 -07:00
l3mdev.h
lag.h
lapb.h
lib80211.h
llc_c_ac.h net: llc: Remove unused function declarations 2023-08-04 15:33:17 -07:00
llc_c_ev.h net: llc: Remove unused function declarations 2023-08-04 15:33:17 -07:00
llc_c_st.h
llc_conn.h llc: Check netns in llc_estab_match() and llc_listener_match(). 2023-07-20 10:46:28 +02:00
llc_if.h
llc_pdu.h llc: Drop support for ETH_P_TR_802_2. 2024-01-31 16:19:01 -08:00
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
llc.h
lwtunnel.h lwt: Check LWTUNNEL_XMIT_CONTINUE strictly 2023-08-18 16:05:26 +02:00
mac80211.h wifi: mac80211: don't use rate mask for scanning 2024-06-12 11:11:22 +02:00
mac802154.h mac802154: Drop IEEE802154_HW_RX_DROP_BAD_CKSUM 2022-10-12 12:57:19 +02:00
macsec.h macsec: Enable devices to advertise whether they update sk_buff md_dst during offloads 2024-05-02 16:32:50 +02:00
mctp.h net: mctp: take ownership of skb in mctp_local_output 2024-03-06 14:48:34 +00:00
mctpdevice.h
mip6.h
mld.h
mpls_iptunnel.h
mpls.h
mptcp.h mptcp: add struct mptcp_sched_ops 2023-08-22 17:31:18 -07:00
mrp.h mrp: introduce active flags to prevent UAF when applicant uninit 2022-11-18 12:14:55 +00:00
ncsi.h
ndisc.h ndisc: Remove unused ndisc_ifinfo_sysctl_strategy() declaration 2023-08-07 08:53:55 +01:00
neighbour.h neighbour: Fix __randomize_layout crash in struct neighbour 2023-12-08 08:52:23 +01:00
net_debug.h
net_failover.h
net_namespace.h sysctl-6.6-rc1 2023-08-29 17:39:15 -07:00
net_ratelimit.h
net_trackers.h
netdev_queues.h net: netdev_queue: netdev_txq_completed_mb(): fix wake condition 2024-01-25 15:35:57 -08:00
netdev_rx_queue.h net: move struct netdev_rx_queue out of netdevice.h 2023-08-03 08:38:07 -07:00
netevent.h
netlabel.h
netlink.h netlink: allow be16 and be32 types in all uint policy checks 2023-07-27 13:45:51 +02:00
netprio_cgroup.h
netrom.h
nexthop.h ipv6: remove nexthop_fib6_nh_bh() 2023-05-11 18:07:05 -07:00
nl802154.h ieee802154: Add support for user beaconing requests 2023-01-28 13:51:22 +01:00
nsh.h net: NSH: fix kernel-doc notation warning 2023-07-14 20:39:29 -07:00
p8022.h net: 802: Remove unused function declarations 2023-08-04 15:33:50 -07:00
pie.h pie: fix kernel-doc notation warning 2023-07-14 20:39:30 -07:00
ping.h net/ipv4: ping_group_range: allow GID from 2147483648 to 4294967294 2023-06-02 09:55:22 +01:00
pkt_cls.h net: pkt_cls: Remove unused inline helpers 2023-08-07 08:53:54 +01:00
pkt_sched.h net/sched: make psched_mtu() RTNL-less safe 2023-07-12 15:59:33 -07:00
pptp.h
protocol.h
psample.h
psnap.h
raw.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-04-06 12:01:20 -07:00
rawv6.h ipv6: raw: constify raw_v6_match() socket argument 2023-03-17 08:56:37 +00:00
red.h treewide: use get_random_u32() when possible 2022-10-11 17:42:58 -06:00
regulatory.h wifi: cfg80211: fix regulatory disconnect with OCB/NAN 2023-06-19 12:05:29 +02:00
request_sock.h
rose.h
route.h inet: move inet->transparent to inet->inet_flags 2023-08-16 11:09:17 +01:00
rpl.h ipv6: rpl: Remove pskb(_may)?_pull() in ipv6_rpl_srh_rcv(). 2023-06-19 11:32:58 -07:00
rsi_91x.h rsi: remove kernel-doc comment marker 2023-07-14 20:39:30 -07:00
rtnetlink.h net: validate veth and vxcan peer ifindexes 2023-08-20 11:40:03 +01:00
rtnh.h
sch_generic.h net/sched: flower: Fix chain template offload 2024-01-31 16:19:02 -08:00
scm.h af_unix: Fix msg_controllen test in scm_pidfd_recv() for MSG_CMSG_COMPAT. 2023-09-04 11:00:17 +01:00
secure_seq.h
seg6_hmac.h
seg6_local.h
seg6.h
selftests.h
slhc_vj.h
smc.h net/smc: Introduce explicit check for v2 support 2023-03-15 08:18:35 +00:00
snmp.h
sock_reuseport.h soreuseport: Fix socket selection for SO_INCOMING_CPU. 2022-10-25 11:35:16 +02:00
sock.h net: fix sk_memory_allocated_{add|sub} vs softirqs 2024-05-02 16:32:36 +02:00
Space.h net: Space.h: Remove unused function declarations 2023-08-03 18:10:10 -07:00
stp.h
strparser.h
switchdev.h net: bridge: switchdev: Skip MDB replays of deferred events on offload 2024-03-01 13:35:06 +01:00
tc_wrapper.h net/sched: Retire rsvp classifier 2023-02-16 09:27:07 +01:00
tcp_states.h
tcp.h tcp: increase the default TCP scaling ratio 2024-06-12 11:11:41 +02:00
tcx.h bpf: Add fd-based tcx multi-prog infra with link support 2023-07-19 10:07:27 -07:00
timewait_sock.h
tipc.h
tls_prot.h net/tls: Add TLS Alert definitions 2023-07-28 14:07:59 -07:00
tls_toe.h
tls.h tls: fix lockless read of strp->msg_ready in ->poll 2024-05-02 16:32:40 +02:00
transp_v6.h inet6: Remove unused function declaration udpv6_connect() 2023-08-01 15:06:27 -07:00
tso.h net: tso: inline tso_count_descs() 2022-12-12 15:04:39 -08:00
tun_proto.h
udp_tunnel.h udp: lockless UDP_ENCAP_L2TPINUDP / UDP_GRO 2023-11-20 11:58:56 +01:00
udp.h udp/udplite: Remove unused function declarations udp{,lite}_get_port() 2023-08-07 08:53:55 +01:00
udplite.h udplite: fix various data-races 2023-11-20 11:58:56 +01:00
vsock_addr.h
vxlan.h vxlan: Fix nexthop hash size 2023-08-02 10:58:26 +01:00
wext.h
x25.h x25: preserve const qualifier in [a]x25_sk() 2023-03-18 12:23:34 +00:00
x25device.h
xdp_priv.h
xdp_sock_drv.h xsk: fix usage of multi-buffer BPF helpers for ZC XDP 2024-01-31 16:19:04 -08:00
xdp_sock.h xsk: add multi-buffer support for sockets sharing umem 2024-01-10 17:16:54 +01:00
xdp.h net: invert the netdevice.h vs xdp.h dependency 2023-08-03 08:38:07 -07:00
xfrm.h xfrm: Preserve vlan tags for transport mode software GRO 2024-05-17 12:02:20 +02:00
xsk_buff_pool.h xsk: support mbuf on ZC RX 2023-07-19 09:56:49 -07:00