WSL2-Linux-Kernel/net
Arnaldo Carvalho de Melo a2e2725541 net: Introduce recvmmsg socket syscall
Meaning receive multiple messages, reducing the number of syscalls and
net stack entry/exit operations.

Next patches will introduce mechanisms where protocols that want to
optimize this operation will provide an unlocked_recvmsg operation.

This takes into account comments made by:

. Paul Moore: sock_recvmsg is called only for the first datagram,
  sock_recvmsg_nosec is used for the rest.

. Caitlin Bestler: recvmmsg now has a struct timespec timeout, that
  works in the same fashion as the ppoll one.

  If the underlying protocol returns a datagram with MSG_OOB set, this
  will make recvmmsg return right away with as many datagrams (+ the OOB
  one) it has received so far.

. Rémi Denis-Courmont & Steven Whitehouse: If we receive N < vlen
  datagrams and then recvmsg returns an error, recvmmsg will return
  the successfully received datagrams, store the error and return it
  in the next call.

This paves the way for a subsequent optimization, sk_prot->unlocked_recvmsg,
where we will be able to acquire the lock only at batch start and end, not at
every underlying recvmsg call.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-12 23:40:10 -07:00
..
9p virtio: add virtio IDs file 2009-09-23 22:26:32 +09:30
802 net: remove COMPAT_NET_DEV_OPS 2009-05-25 01:53:53 -07:00
8021q net: fix vlan_get_size to include vlan_flags size 2009-09-26 20:16:07 -07:00
appletalk net: mark net_proto_ops as const 2009-10-07 01:10:46 -07:00
atm net: Generalize socket rx gap / receive queue overflow cmsg 2009-10-12 13:26:31 -07:00
ax25 net: mark net_proto_ops as const 2009-10-07 01:10:46 -07:00
bluetooth net: Generalize socket rx gap / receive queue overflow cmsg 2009-10-12 13:26:31 -07:00
bridge bridge: Allow enable/disable UFO on bridge device via ethtool 2009-10-07 22:00:24 -07:00
can net: Generalize socket rx gap / receive queue overflow cmsg 2009-10-12 13:26:31 -07:00
core net: Generalize socket rx gap / receive queue overflow cmsg 2009-10-12 13:26:31 -07:00
dcb net: fix double skb free in dcbnl 2009-09-26 20:16:15 -07:00
dccp IPv6: use ipv6_addr_set_v4mapped() 2009-10-07 13:58:25 -07:00
decnet net: mark net_proto_ops as const 2009-10-07 01:10:46 -07:00
dsa netdev: convert pseudo-devices to netdev_tx_t 2009-09-01 01:13:07 -07:00
econet econet: Fix redeclaration of symbol len 2009-10-07 14:43:04 -07:00
ethernet net: remove COMPAT_NET_DEV_OPS 2009-05-25 01:53:53 -07:00
ieee802154 net: Generalize socket rx gap / receive queue overflow cmsg 2009-10-12 13:26:31 -07:00
ipv4 net: Generalize socket rx gap / receive queue overflow cmsg 2009-10-12 13:26:31 -07:00
ipv6 net: Generalize socket rx gap / receive queue overflow cmsg 2009-10-12 13:26:31 -07:00
ipx net: mark net_proto_ops as const 2009-10-07 01:10:46 -07:00
irda net: mark net_proto_ops as const 2009-10-07 01:10:46 -07:00
iucv net: mark net_proto_ops as const 2009-10-07 01:10:46 -07:00
key net: Generalize socket rx gap / receive queue overflow cmsg 2009-10-12 13:26:31 -07:00
lapb net: remove NET_RX_BAD and NET_RX_CN* defines 2009-07-05 19:15:35 -07:00
llc net: mark net_proto_ops as const 2009-10-07 01:10:46 -07:00
mac80211 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-10-11 23:15:47 -07:00
netfilter net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
netlabel Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-07-30 19:22:43 -07:00
netlink net: mark net_proto_ops as const 2009-10-07 01:10:46 -07:00
netrom net: mark net_proto_ops as const 2009-10-07 01:10:46 -07:00
packet net: Generalize socket rx gap / receive queue overflow cmsg 2009-10-12 13:26:31 -07:00
phonet net: mark net_proto_ops as const 2009-10-07 01:10:46 -07:00
rds net: mark net_proto_ops as const 2009-10-07 01:10:46 -07:00
rfkill headers: remove sched.h from poll.h 2009-10-04 15:05:10 -07:00
rose net: mark net_proto_ops as const 2009-10-07 01:10:46 -07:00
rxrpc net: Generalize socket rx gap / receive queue overflow cmsg 2009-10-12 13:26:31 -07:00
sched Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-10-11 23:15:47 -07:00
sctp net: Generalize socket rx gap / receive queue overflow cmsg 2009-10-12 13:26:31 -07:00
sunrpc IPv6: use ipv6_addr_set_v4mapped() 2009-10-07 13:58:25 -07:00
tipc net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
unix net: mark net_proto_ops as const 2009-10-07 01:10:46 -07:00
wanrouter headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
wimax wimax: fix warning caused by not checking retval of rfkill_set_hw_state() 2009-06-11 11:12:48 -07:00
wireless Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-10-11 23:15:47 -07:00
x25 net: mark net_proto_ops as const 2009-10-07 01:10:46 -07:00
xfrm net: file_operations should be const 2009-09-02 01:03:53 -07:00
Kconfig net/compat/wext: send different messages to compat tasks 2009-07-15 08:53:39 -07:00
Makefile net: remove redundant sched/ in net/Makefile 2009-07-12 20:11:14 -07:00
TUNABLE
compat.c net: Introduce recvmmsg socket syscall 2009-10-12 23:40:10 -07:00
nonet.c
socket.c net: Introduce recvmmsg socket syscall 2009-10-12 23:40:10 -07:00
sysctl_net.c net: sysctl_net - use net_eq to compare nets 2009-03-16 16:23:30 +01:00