linux/net
Davide Libenzi f348d70a32 [PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications
Implement the half-closed devices notifiation, by adding a new POLLRDHUP
(and its alias EPOLLRDHUP) bit to the existing poll/select sets.  Since the
existing POLLHUP handling, that does not report correctly half-closed
devices, was feared to be changed, this implementation leaves the current
POLLHUP reporting unchanged and simply add a new bit that is set in the few
places where it makes sense.  The same thing was discussed and conceptually
agreed quite some time ago:

http://lkml.org/lkml/2003/7/12/116

Since this new event bit is added to the existing Linux poll infrastruture,
even the existing poll/select system calls will be able to use it.  As far
as the existing POLLHUP handling, the patch leaves it as is.  The
pollrdhup-2.6.16.rc5-0.10.diff defines the POLLRDHUP for all the existing
archs and sets the bit in the six relevant files.  The other attached diff
is the simple change required to sys/epoll.h to add the EPOLLRDHUP
definition.

There is "a stupid program" to test POLLRDHUP delivery here:

 http://www.xmailserver.org/pollrdhup-test.c

It tests poll(2), but since the delivery is same epoll(2) will work equally.

Signed-off-by: Davide Libenzi <davidel@xmailserver.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Michael Kerrisk <mtk-manpages@gmx.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25 08:22:56 -08:00
..
802 [SNAP]: Remove leftover unused hdr variable 2006-03-20 22:45:37 -08:00
8021q [NET]: Replace skb_pull/skb_postpull_rcsum with skb_pull_rcsum 2006-03-20 22:43:56 -08:00
appletalk [PATCH] capable/capability.h (net/) 2006-01-11 18:42:14 -08:00
atm [NET]: sem2mutex part 2 2006-03-20 22:35:41 -08:00
ax25 [AX.25]: Fix potencial memory hole. 2006-03-19 13:20:06 -08:00
bluetooth [PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications 2006-03-25 08:22:56 -08:00
bridge [BRIDGE]: Remove duplicate const from is_link_local() argument type. 2006-03-20 23:00:56 -08:00
core [PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications 2006-03-25 08:22:56 -08:00
dccp [PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications 2006-03-25 08:22:56 -08:00
decnet [DECNET]: net/decnet/dn_route.c: fix inconsequent NULL checking 2006-03-20 23:00:29 -08:00
econet [ECONET]: Use macro for spinlock_t definition. 2006-01-04 13:56:08 -08:00
ethernet [NET] ethernet: Fix first packet goes out with MAC 00:00:00:00:00:00 2006-02-23 16:18:01 -08:00
ieee80211 [PATCH] Restore channel setting after scan. 2006-03-23 16:18:47 -05:00
ipv4 [PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications 2006-03-25 08:22:56 -08:00
ipv6 [IPV6]: ip6_xmit: remove unnecessary NULL ptr check 2006-03-23 01:17:25 -08:00
ipx [PATCH] capable/capability.h (net/) 2006-01-11 18:42:14 -08:00
irda [IRDA]: out of range array access 2006-02-09 16:59:48 -08:00
key [NET] sem2mutex: net/ 2006-03-20 22:33:17 -08:00
lapb [NET]: Kill skb->list 2005-08-29 15:31:14 -07:00
llc [LLC]: llc_mac_hdr_init const arguments 2006-03-20 22:59:36 -08:00
netfilter [NETFILTER]: Fix xt_policy address matching 2006-03-22 13:56:33 -08:00
netlink [NETLINK]: Add netlink_has_listeners for avoiding unneccessary event message generation 2006-03-20 18:52:01 -08:00
netrom [PATCH] capable/capability.h (net/) 2006-01-11 18:42:14 -08:00
packet [NET]: Fix some whitespace issues in af_packet.c 2006-01-23 16:28:02 -08:00
rose [PATCH] capable/capability.h (net/) 2006-01-11 18:42:14 -08:00
rxrpc [PATCH] fix 'defined but not used' warning in net/rxrpc/main.c::rxrpc_initialise 2006-03-25 08:22:52 -08:00
sched [NET_SCHED]: cls_u32: remove unnecessary NULL-ptr check 2006-03-23 01:16:48 -08:00
sctp [PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications 2006-03-25 08:22:56 -08:00
sunrpc [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
tipc [PATCH] s/;;/;/g 2006-03-24 07:33:24 -08:00
unix [PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications 2006-03-25 08:22:56 -08:00
wanrouter [PATCH] capable/capability.h (net/) 2006-01-11 18:42:14 -08:00
x25 [X25]: dte facilities 32 64 ioctl conversion 2006-03-22 00:02:00 -08:00
xfrm [XFRM]: Fix aevent related crash 2006-03-20 22:40:54 -08:00
compat.c [NET]: socket timestamp 32 bit handler for 64 bit kernel 2006-03-21 23:59:39 -08:00
Kconfig Merge branch 'master' 2006-02-07 01:47:12 -05:00
Makefile [TIPC] Initial merge 2006-01-12 14:06:31 -08:00
nonet.c [NET]: Fix sock_init() return value. 2006-01-03 13:11:17 -08:00
socket.c [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
sysctl_net.c [NET]: Fix "sysctl_net.c:36: error: 'core_table' undeclared here" 2005-10-03 14:16:34 -07:00
TUNABLE Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00