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d989c7b389
freebsd-nq/sys
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Robert Watson d989c7b389 Introduce a netisr to deliver kernel-generated routing, avoiding 
recursive entering of the socket code from the routing code:

- Modify rt_dispatch() to bundle up the sockaddr family, if any,
  associated with a pending mbuf to dispatch to routing sockets, in
  an m_tag on the mbuf.

- Allocate NETISR_ROUTE for use by routing sockets.

- Introduce rtsintrq, an ifqueue to be used by the netisr, and
  introduce rts_input(), a function to unbundle the tagged sockaddr
  and inject the mbuf and address into raw_input(), which previously
  occurred in rt_dispatch().

- Introduce rts_init() to initialize rtsintrq, its mutex, and
  register the netisr.  Perform this at the same point in system
  initialization as setup of the domains.

This change introduces asynchrony between the generation of a
pending routing socket message and delivery to sockets for use
by userspace.  It avoids socket->routing->rtsock->socket use and
helps to avoid lock order reversals between the routing code and
socket code (in particular, raw socket control blocks), as route
locks are held over calls to rt_dispatch().

Reviewed by:		"George V.Neville-Neil" <gnn@neville-neil.com>
Conceptual head nod by:	sam
2004-06-09 02:48:23 +00:00
..
alpha Remove filename+line number from panic messages. 2004-06-06 21:26:49 +00:00
amd64 In pmap_extract_and_hold(), there is no need to mask off PG_FRAME because 2004-06-08 02:20:40 +00:00
arm Remove filename+line number from panic messages. 2004-06-06 21:26:49 +00:00
boot Some embedded platforms have no keyboard controller. Give up waiting 2004-06-02 09:38:32 +00:00
cam Reformat the comments for cam_hdr so that they can be read. 2004-06-07 19:12:44 +00:00
coda add missing #include <sys/module.h> 2004-05-30 20:27:19 +00:00
compat Add another 5.2.1 source compatibility tweak: acquire Giant before calling 2004-06-07 01:22:48 +00:00
conf Remove references to L1 in the comments, according to Alan they are 2004-06-07 19:33:05 +00:00
contrib Recognise NOINET6 as an indication to not build IPv6 enabled source even 2004-06-08 23:52:22 +00:00
crypto Fix a reentrancy issue in md5_calc(). 2004-01-27 18:57:21 +00:00
ddb Fixed DDB_NOKLDSYM on amd64's: 2004-05-18 05:30:06 +00:00
dev Replace convoluted and broken CRC calcuation with ether_crc32_le(). 2004-06-09 00:30:11 +00:00
fs Add MSG_NBIO flag option to soreceive() and sosend() that causes 2004-06-01 01:18:51 +00:00
geom Fix format string. 2004-06-07 13:40:40 +00:00
gnu Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
i4b add missing #include <sys/module.h> 2004-05-30 20:27:19 +00:00
i386 Remove filename+line number from panic messages. 2004-06-06 21:26:49 +00:00
ia64 Machine generated patch which changes linedisc calls from accessing 2004-06-04 16:02:56 +00:00
isa add missing #include <sys/module.h> 2004-05-30 20:27:19 +00:00
isofs/cd9660 Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
kern Avoid assignments to cast expressions. 2004-06-08 13:08:19 +00:00
libkern Import libkern arm specific bits. 2004-05-14 12:28:31 +00:00
modules Recognise NOINET6 as an indication to not build IPv6 enabled source even 2004-06-08 23:52:22 +00:00
net Introduce a netisr to deliver kernel-generated routing, avoiding 2004-06-09 02:48:23 +00:00
net80211 Add some missing <sys/module.h> includes which are masked by the 2004-05-30 17:57:46 +00:00
netatalk Remove redundant call to soisdisconnected() from ddp_abort(), as it 2004-05-05 03:34:37 +00:00
netatm Remove an #if section originally written for Sun compilers. 2004-06-08 13:46:31 +00:00
netgraph Now that mbufs are allocated using uma, 2004-06-07 22:11:12 +00:00
netinet do not send icmp response if the original packet is encrypted. 2004-06-07 09:56:59 +00:00
netinet6 do not check super user privilege in ip6_savecontrol. It is 2004-06-02 15:41:18 +00:00
netipsec use correct address for SADB_EXT_ADDRESS_DST in key_do_allocsa_policy 2004-05-03 05:15:53 +00:00
netipx Rename dup_sockaddr() to sodupsockaddr() for consistency with other 2004-03-01 03:14:23 +00:00
netkey avoid duplicate free. 2004-01-25 17:18:12 +00:00
netnatm Rename dup_sockaddr() to sodupsockaddr() for consistency with other 2004-03-01 03:14:23 +00:00
netncp add missing #include <sys/module.h> 2004-05-30 20:27:19 +00:00
netsmb add missing #include <sys/module.h> 2004-05-30 20:27:19 +00:00
nfs Remove advertising clause from University of California Regent's 2004-04-07 05:00:01 +00:00
nfs4client Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
nfsclient Make vm_page's PG_ZERO flag immutable between the time of the page's 2004-05-06 05:03:23 +00:00
nfsserver Giant wasn't dropped here if we have to return EBUSY. This is bad. 2004-05-31 20:21:06 +00:00
opencrypto add missing #include <sys/module.h> 2004-05-30 20:27:19 +00:00
pc98 Add missing <sys/module.h> includes. 2004-06-07 06:04:27 +00:00
pccard Convert callers to the new bus_alloc_resource_any(9) API. 2004-03-17 17:50:55 +00:00
pci Add missing <sys/module.h> includes 2004-05-30 20:00:41 +00:00
posix4 The sem_timedwait() and ksem_timedwait() functions both 2004-02-03 22:27:03 +00:00
powerpc Remove checks for curthread == NULL - it can't happen. 2004-06-03 10:22:47 +00:00
rpc Remove advertising clause from University of California Regent's 2004-04-07 05:00:01 +00:00
security add missing #include <sys/module.h> 2004-05-30 20:27:19 +00:00
sparc64 Remove filename+line number from panic messages. 2004-06-06 21:26:49 +00:00
sys Introduce a netisr to deliver kernel-generated routing, avoiding 2004-06-09 02:48:23 +00:00
tools devlist2h.awk is too generic a name for what it does. It really 2004-05-26 00:19:39 +00:00
ufs Avoid assignments to cast expressions. 2004-06-08 13:08:19 +00:00
vm Remove references to L1 in the comments, according to Alan they are 2004-06-07 19:33:05 +00:00
Makefile Try harder not to compile anything in sys/boot for arm. 2004-05-16 00:19:12 +00:00