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01883eda72
linux-next/net
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Sowmini Varadhan 01883eda72 rds: support for zcopy completion notification 
RDS removes a datagram (rds_message) from the retransmit queue when
an ACK is received. The ACK indicates that the receiver has queued
the RDS datagram, so that the sender can safely forget the datagram.
When all references to the rds_message are quiesced, rds_message_purge
is called to release resources used by the rds_message

If the datagram to be removed had pinned pages set up, add
an entry to the rs->rs_znotify_queue so that the notifcation
will be sent up via rds_rm_zerocopy_callback() when the
rds_message is eventually freed by rds_message_purge.

rds_rm_zerocopy_callback() attempts to batch the number of cookies
sent with each notification  to a max of SO_EE_ORIGIN_MAX_ZCOOKIES.
This is achieved by checking the tail skb in the sk_error_queue:
if this has room for one more cookie, the cookie from the
current notification is added; else a new skb is added to the
sk_error_queue. Every invocation of rds_rm_zerocopy_callback() will
trigger a ->sk_error_report to notify the application.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-16 16:04:17 -05:00
..
6lowpan License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
9p vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
802 treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
8021q net: delete /proc THIS_MODULE references 2018-01-16 15:01:33 -05:00
appletalk net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
atm net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
ax25 net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
batman-adv vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
bluetooth Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next 2018-02-15 15:43:49 -05:00
bpf bpf: fix null pointer deref in bpf_prog_test_run_xdp 2018-02-01 07:43:56 -08:00
bridge net: bridge: Fix uninitialized error in br_fdb_sync_static() 2018-02-01 09:47:37 -05:00
caif vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
can net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
ceph libceph: check kstrndup() return value 2018-01-29 18:36:12 +01:00
core sock: permit SO_ZEROCOPY on PF_RDS socket 2018-02-16 16:04:16 -05:00
dcb rtnetlink: make rtnl_register accept a flags parameter 2017-08-09 16:57:38 -07:00
dccp vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
decnet net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
dns_resolver afs: Support the AFS dynamic root 2018-02-06 14:43:37 +00:00
dsa net: dsa: forward timestamping callbacks to switch drivers 2018-02-14 14:33:37 -05:00
ethernet
hsr net: hsr: Convert timers to use timer_setup() 2017-10-25 13:00:27 +09:00
ieee802154 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
ife MAINTAINERS: Update Yotam's E-mail 2017-11-01 12:19:03 +09:00
ipv4 net/ipv4: Remove fib table id from rtable 2018-02-15 15:41:42 -05:00
ipv6 net: Move ipv4 set_lwt_redirect helper to lwtunnel 2018-02-14 14:43:32 -05:00
iucv net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
kcm kcm: Call strp_stop before strp_done in kcm_attach 2018-02-14 15:38:39 -05:00
key af_key: Fix memory leak in key_notify_policy. 2018-01-10 09:45:11 +01:00
l2tp net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
l3mdev
lapb treewide: Remove TIMER_FUNC_TYPE and TIMER_DATA_TYPE casts 2017-11-21 16:35:54 -08:00
llc net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
mac80211 debugfs_sta: Remove unneeded semicolons 2018-01-22 14:03:28 +01:00
mac802154 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
mpls mpls, nospec: Sanitize array index in mpls_label_ok() 2018-02-08 15:24:12 -05:00
ncsi net/ncsi: Don't take any action on HNCDSC AEN 2017-12-18 14:50:11 -05:00
netfilter net: Convert nf_log_net_ops 2018-02-13 10:36:06 -05:00
netlabel net/netlabel: Add list_next_rcu() in rcu_dereference(). 2017-11-18 10:32:41 +09:00
netlink net: Convert netlink_tap_net_ops 2018-02-13 10:36:09 -05:00
netrom net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
nfc net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
nsh openvswitch: enable NSH support 2017-11-08 16:12:33 +09:00
openvswitch openvswitch: Remove padding from packet before L3+ conntrack processing 2018-02-01 09:46:22 -05:00
packet net: Convert packet_net_ops 2018-02-13 10:36:08 -05:00
phonet net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
psample MAINTAINERS: Update Yotam's E-mail 2017-11-01 12:19:03 +09:00
qrtr net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
rds rds: support for zcopy completion notification 2018-02-16 16:04:17 -05:00
rfkill vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
rose net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
rxrpc vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
sched net: Revert sched action extack support series. 2018-02-16 16:03:39 -05:00
sctp sctp: add file comments in diag.c 2018-02-13 13:56:31 -05:00
smc net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
strparser strparser: Call sock_owned_by_user_nocheck 2017-12-28 14:28:22 -05:00
sunrpc net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
switchdev net: bridge: Add/del switchdev object on host join/leave 2017-11-10 13:41:40 +09:00
tipc tipc: rename tipc_server to tipc_topsrv 2018-02-16 15:26:34 -05:00
tls net: add a UID to use for ULP socket assignment 2018-02-06 11:39:31 +01:00
unix net: Convert unix_net_ops 2018-02-13 10:36:08 -05:00
vmw_vsock net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
wimax License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
wireless net: Convert wext_pernet_ops 2018-02-13 10:36:08 -05:00
x25 net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
xfrm net: Convert pernet_subsys, registered from inet_init() 2018-02-13 10:36:08 -05:00
compat.c net: compat: assert the size of cmsg copied in is as expected 2017-09-20 15:36:18 -07:00
Kconfig Staging/IIO patches for 4.16-rc1 2018-02-01 09:51:57 -08:00
Makefile ipx: move Novell IPX protocol support into staging 2017-11-28 13:55:00 +01:00
socket.c net: Make extern and export get_net_ns() 2018-02-15 15:34:42 -05:00
sysctl_net.c net: Convert sysctl_pernet_ops 2018-02-13 10:36:05 -05:00