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freebsd-skq/sys/net
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George V. Neville-Neil e162ea60d4 Add a queue to hold packets while we await an ARP reply. 
When a fast machine first brings up some non TCP networking program
it is quite possible that we will drop packets due to the fact that
only one packet can be held per ARP entry.  This leads to packets
being missed when a program starts or restarts if the ARP data is
not currently in the ARP cache.

This code adds a new sysctl, net.link.ether.inet.maxhold, which defines
a system wide maximum number of packets to be held in each ARP entry.
Up to maxhold packets are queued until an ARP reply is received or
the ARP times out.  The default setting is the old value of 1
which has been part of the BSD networking code since time
immemorial.

Expose the time we hold an incomplete ARP entry by adding
the sysctl net.link.ether.inet.wait, which defaults to 20
seconds, the value used when the new ARP code was added..

Reviewed by:	bz, rpaulo
MFC after: 3 weeks
2010-11-12 22:03:02 +00:00
..
bpf_buffer.c Always embed pointer to BPF JIT function in BPF descriptor 2009-08-12 17:28:53 +00:00
bpf_buffer.h
bpf_filter.c
bpf_jitter.c General style cleanup, no functional change. 2009-11-20 21:12:40 +00:00
bpf_jitter.h - Allocate scratch memory on stack instead of pre-allocating it with 2009-11-20 18:49:20 +00:00
bpf_zerocopy.c Remove page queues locking from all sf_buf_mext()-like functions. The page 2010-05-06 17:43:41 +00:00
bpf_zerocopy.h
bpf.c Fix a typo in a comment. 2010-09-16 18:37:33 +00:00
bpf.h Sync DLTs with the latest pcap version. 2010-10-29 18:41:09 +00:00
bpfdesc.h Implement flexible BPF timestamping framework. 2010-06-15 19:28:44 +00:00
bridgestp.c Rework global locks for interface list and index management, correcting 2009-08-23 20:40:19 +00:00
bridgestp.h
ethernet.h Change if_output to take a struct route as its fourth argument in order 2009-04-16 20:30:28 +00:00
fddi.h Switch cmd argument to u_long. This matches what if_ethersubr.c does and 2009-06-21 10:29:31 +00:00
firewire.h Switch cmd argument to u_long. This matches what if_ethersubr.c does and 2009-06-21 10:29:31 +00:00
flowtable.c Update several places that iterate over CPUs to use CPU_FOREACH(). 2010-06-11 18:46:34 +00:00
flowtable.h allocate ipv6 flows from the ipv6 flow zone 2010-05-16 21:48:39 +00:00
ieee8023ad_lacp.c Use the flowid if its available for selecting the tx port. 2009-04-30 14:25:44 +00:00
ieee8023ad_lacp.h
if_arc.h Switch cmd argument to u_long. This matches what if_ethersubr.c does and 2009-06-21 10:29:31 +00:00
if_arcsubr.c Switch cmd argument to u_long. This matches what if_ethersubr.c does and 2009-06-21 10:29:31 +00:00
if_arp.h Add ARP statistics to the kernel and netstat. 2009-09-03 21:10:57 +00:00
if_atm.h Change if_output to take a struct route as its fourth argument in order 2009-04-16 20:30:28 +00:00
if_atmsubr.c Move "options MAC" from opt_mac.h to opt_global.h, as it's now in GENERIC 2009-06-05 14:55:22 +00:00
if_bridge.c Unbreak LINT by moving all carp hooks to net/if.c / netinet/ip_carp.h, with 2010-08-11 20:18:19 +00:00
if_bridgevar.h
if_clone.c Take a reference to make sure that the interface cannot go away during 2010-04-11 18:47:38 +00:00
if_clone.h Introduce and use a sysinit-based initialization scheme for virtual 2009-07-23 20:46:49 +00:00
if_dead.c Remove if_timer/if_watchdog now that they are no longer used. The space 2009-11-30 21:25:57 +00:00
if_debug.c Factor out DDB commands from r204145, r204279 into if_debug.c for further 2010-10-25 08:30:19 +00:00
if_disc.c Change if_output to take a struct route as its fourth argument in order 2009-04-16 20:30:28 +00:00
if_dl.h
if_edsc.c
if_ef.c Add new tunable 'net.link.ifqmaxlen' to set default send interface 2010-05-03 07:32:50 +00:00
if_enc.c Unbreak the VIMAGE build with IPSEC, broken with r197952 by 2009-10-14 11:55:55 +00:00
if_enc.h
if_epair.c MFp4 CH=183259: 2010-09-02 16:11:12 +00:00
if_ethersubr.c When moving an ethernet ifnet from one vnet to another, destroy the 2010-08-13 18:17:32 +00:00
if_faith.c Merge the remainder of kern_vimage.c and vimage.h into vnet.c and 2009-08-01 19:26:27 +00:00
if_fddisubr.c Break at_ifawithnet() into two variants: 2009-06-24 10:32:44 +00:00
if_fwsubr.c Switch cmd argument to u_long. This matches what if_ethersubr.c does and 2009-06-21 10:29:31 +00:00
if_gif.c Add new tunable 'net.link.ifqmaxlen' to set default send interface 2010-05-03 07:32:50 +00:00
if_gif.h MFP4: @176978-176982, 176984, 176990-176994, 177441 2010-04-29 11:52:42 +00:00
if_gre.c Add new tunable 'net.link.ifqmaxlen' to set default send interface 2010-05-03 07:32:50 +00:00
if_gre.h The NetBSD Foundation has granted permission to remove clause 3 and 4 from 2010-03-01 17:05:46 +00:00
if_iso88025subr.c Switch cmd argument to u_long. This matches what if_ethersubr.c does and 2009-06-21 10:29:31 +00:00
if_lagg.c Add a sysctl knob to accept input packets on any link in a failover lagg. 2010-09-01 16:53:38 +00:00
if_lagg.h Propagate the vlan eventis to the underlying interfaces/members so they can do initialization of hw related features. 2010-02-06 13:49:35 +00:00
if_llatbl.c Add a queue to hold packets while we await an ARP reply. 2010-11-12 22:03:02 +00:00
if_llatbl.h Add a queue to hold packets while we await an ARP reply. 2010-11-12 22:03:02 +00:00
if_llc.h
if_loop.c ifconfig(8) expects interface fooX to be supported by the module if_foo, 2010-02-21 15:25:47 +00:00
if_media.c
if_media.h Add MCS to the list of media types. 2010-03-23 13:15:11 +00:00
if_mib.c Merge the remainder of kern_vimage.c and vimage.h into vnet.c and 2009-08-01 19:26:27 +00:00
if_mib.h
if_sppp.h
if_spppfr.c
if_spppsubr.c Merge the remainder of kern_vimage.c and vimage.h into vnet.c and 2009-08-01 19:26:27 +00:00
if_stf.c Add new tunable 'net.link.ifqmaxlen' to set default send interface 2010-05-03 07:32:50 +00:00
if_stf.h
if_tap.c - Expand scope of tun/tap softc locks to cover more softc fields and 2010-09-22 21:02:43 +00:00
if_tap.h
if_tapvar.h
if_tun.c Only hide the ifa and not the tp under #ifdef INET as the tp is needed 2010-10-01 15:14:14 +00:00
if_tun.h
if_types.h
if_var.h This patch fixes the problem where proxy ARP entries cannot be added 2010-05-25 20:42:35 +00:00
if_vlan_var.h
if_vlan.c Adjust the interface type in the link layer socket address for vlan(4) 2010-08-06 15:15:26 +00:00
if.c Factor out DDB commands from r204145, r204279 into if_debug.c for further 2010-10-25 08:30:19 +00:00
if.h Reshuffle SIOCGIFCONF32 handler from r155224. 2010-10-21 16:20:48 +00:00
iso88025.h Switch cmd argument to u_long. This matches what if_ethersubr.c does and 2009-06-21 10:29:31 +00:00
netisr_internal.h Changes to support crashdump analysis of netisr: 2010-03-01 00:42:36 +00:00
netisr.c Update several places that iterate over CPUs to use CPU_FOREACH(). 2010-06-11 18:46:34 +00:00
netisr.h Whitespace tweak. 2010-03-01 00:43:05 +00:00
pfil.c Clean up comments, white space, and style in pfil.c (especially new VNET 2009-10-19 15:19:14 +00:00
pfil.h small portability fix to build on linux/windows 2010-07-15 14:41:06 +00:00
pfkeyv2.h Added support for NAT-Traversal (RFC 3948) in IPsec stack. 2009-06-12 15:44:35 +00:00
ppp_defs.h
radix_mpath.c One of the advantages of enabling ECMP (a.k.a RADIX_MPATH) is to 2010-03-09 01:11:45 +00:00
radix_mpath.h
radix.c whitespace cleanup 2010-07-15 14:41:59 +00:00
radix.h Not only flush the ipfw tables when unloading ipfw or tearing 2010-03-07 15:37:58 +00:00
raw_cb.c Merge the remainder of kern_vimage.c and vimage.h into vnet.c and 2009-08-01 19:26:27 +00:00
raw_cb.h Remove unused VNET_SET() and related macros; only VNET_GET() is 2009-07-16 21:13:04 +00:00
raw_usrreq.c Merge the remainder of kern_vimage.c and vimage.h into vnet.c and 2009-08-01 19:26:27 +00:00
route.c This patch fixes the problem where proxy ARP entries cannot be added 2010-05-25 20:42:35 +00:00
route.h Verify interface up status using its link state only 2010-03-16 17:59:12 +00:00
rtsock.c Close a race acquiring the IF_ADDR_LOCK() for each entry while iterating 2010-10-16 19:25:27 +00:00
slcompress.c
slcompress.h
vnet.c Add an extra comment to the SDT probes definition. This allows us to get 2010-08-22 11:18:57 +00:00
vnet.h Use the same treatment as in linker_set.h for the __start and __stop 2010-11-11 19:18:52 +00:00
zlib.c
zlib.h Merge projects/enhanced_coredumps (r204346) into HEAD: 2010-03-02 06:58:58 +00:00
zutil.h Merge projects/enhanced_coredumps (r204346) into HEAD: 2010-03-02 06:58:58 +00:00