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Commit Graph

3869 Commits

Author SHA1 Message Date
Qing Li
ccbb9c359d Consolidate the route message generation code for when address
aliases were added or deleted. The announced route entry for
an address alias is no longer empty because this empty route
entry was causing some route daemon to fail and exit abnormally.

MFC after:	5 days
2009-12-30 22:13:01 +00:00
Qing Li
c7ab66020f The proxy arp entries could not be added into the system over the
IFF_POINTOPOINT link types. The reason was due to the routing
entry returned from the kernel covering the remote end is of an
interface type that does not support ARP. This patch fixes this
problem by providing a hint to the kernel routing code, which
indicates the prefix route instead of the PPP host route should
be returned to the caller. Since a host route to the local end
point is also added into the routing table, and there could be
multiple such instantiations due to multiple PPP links can be
created with the same local end IP address, this patch also fixes
the loopback route installation failure problem observed prior to
this patch. The reference count of loopback route to local end would
be either incremented or decremented. The first instantiation would
create the entry and the last removal would delete the route entry.

MFC after:	5 days
2009-12-30 21:35:34 +00:00
Shteryana Shopova
7c90b0258f Make sure the multicast forwarding cache entry's stall queue is properly
initialized before trying to insert an entry into it.

PR:		kern/142052
Reviewed by:	bms
MFC after:	now
2009-12-30 08:52:13 +00:00
Luigi Rizzo
bcd3b68dd2 we really need htonl() here, see the comment a few lines above in the code. 2009-12-29 00:02:57 +00:00
Antoine Brodin
13e403fdea (S)LIST_HEAD_INITIALIZER takes a (S)LIST_HEAD as an argument.
Fix some wrong usages.
Note: this does not affect generated binaries as this argument is not used.

PR:		137213
Submitted by:	Eygene Ryabinkin (initial version)
MFC after:	1 month
2009-12-28 22:56:30 +00:00
Bjoern A. Zeeb
fc74d005d9 Make the compiler happy after r201125:
- + remove two unnecessary initializations in ip_output;
+ + remove one unnecessary initializations in ip_output;
2009-12-28 21:14:18 +00:00
Luigi Rizzo
ec396e61ed introduce a local variable rte acting as a cache of ro->ro_rt
within ip_output, achieving (in random order of importance):
- a reduction of the number of 'r's in the source code;
- improved legibility;
- a reduction of 64 bytes in the .text
2009-12-28 14:48:32 +00:00
Luigi Rizzo
ca8b83b0fa + remove an unused #define print_ip;
+ remove two unnecessary initializations in ip_output;
+ localize 'len';
+ introduce a temporary variable n to count the number of fragments,
  the compiler seems unable to identify a common subexpression
  (written 3 times, used twice);
+ document some assumptions on ip_len and ip_hl
2009-12-28 14:09:46 +00:00
Luigi Rizzo
e59084e086 bring the NGM_IPFW_COOKIE back into ng_ipfw.h, libnetgraph expects
to find it there. Unfortunately this reintroduces the dependency
on ip_fw_pfil.c
2009-12-28 12:29:13 +00:00
Luigi Rizzo
830c6e2b97 bring in several cleanups tested in ipfw3-head branch, namely:
r201011
- move most of ng_ipfw.h into ip_fw_private.h, as this code is
  ipfw-specific. This removes a dependency on ng_ipfw.h from some files.

- move many equivalent definitions of direction (IN, OUT) for
  reinjected packets into ip_fw_private.h

- document the structure of the packet tags used for dummynet
  and netgraph;

r201049
- merge some common code to attach/detach hooks into
  a single function.

r201055
- remove some duplicated code in ip_fw_pfil. The input
  and output processing uses almost exactly the same code so
  there is no need to use two separate hooks.
  ip_fw_pfil.o goes from 2096 to 1382 bytes of .text

r201057 (see the svn log for full details)
- macros to make the conversion of ip_len and ip_off
  between host and network format more explicit

r201113 (the remaining parts)
- readability fixes -- put braces around some large for() blocks,
  localize variables so the compiler does not think they are uninitialized,
  do not insist on precise allocation size if we have more than we need.

r201119
- when doing a lookup, keys must be in big endian format because
  this is what the radix code expects (this fixes a bug in the
  recently-introduced 'lookup' option)

No ABI changes in this commit.

MFC after:	1 week
2009-12-28 10:47:04 +00:00
Luigi Rizzo
6cc7b9f5d9 readability fixes -- add braces on large blocks, remove unnecessary
initializations
2009-12-28 10:19:53 +00:00
Luigi Rizzo
6730dcaec7 explain details of operation of table lookups, and improve portability 2009-12-28 10:12:35 +00:00
Luigi Rizzo
2082ecd966 diverted packet must re-enter _after_ the matching rule,
or we create loops.
The divert cookie (that can be set from userland too)
contains the matching rule nr, so we must start from nr+1.

Reported by: Joe Marcus Clarke
2009-12-27 10:19:10 +00:00
Luigi Rizzo
4a3c1bd27f fix poor indentation resulting from a merge 2009-12-24 17:35:28 +00:00
Luigi Rizzo
84918f5bc8 mostly style changes, such as removal of trailing whitespace,
reformatting to avoid unnecessary line breaks, small block
restructuring to avoid unnecessary nesting, replace macros
with function calls, etc.

As a side effect of code restructuring, this commit fixes one bug:
previously, if a realloc() failed, memory was leaked. Now, the
realloc is not there anymore, as we first count how much memory
we need and then do a single malloc.
2009-12-23 18:53:11 +00:00
Luigi Rizzo
3ae19c3ba3 fix build with the new fast lookup structure.
Also remove some unnecessary headers
2009-12-23 12:15:21 +00:00
Luigi Rizzo
6aab896346 fix build on 64-bit architectures.
Also fix the indentation on a few lines.
2009-12-23 12:00:50 +00:00
Luigi Rizzo
de240d1013 merge code from ipfw3-head to reduce contention on the ipfw lock
and remove all O(N) sequences from kernel critical sections in ipfw.

In detail:

 1. introduce a IPFW_UH_LOCK to arbitrate requests from
     the upper half of the kernel. Some things, such as 'ipfw show',
     can be done holding this lock in read mode, whereas insert and
     delete require IPFW_UH_WLOCK.

  2. introduce a mapping structure to keep rules together. This replaces
     the 'next' chain currently used in ipfw rules. At the moment
     the map is a simple array (sorted by rule number and then rule_id),
     so we can find a rule quickly instead of having to scan the list.
     This reduces many expensive lookups from O(N) to O(log N).

  3. when an expensive operation (such as insert or delete) is done
     by userland, we grab IPFW_UH_WLOCK, create a new copy of the map
     without blocking the bottom half of the kernel, then acquire
     IPFW_WLOCK and quickly update pointers to the map and related info.
     After dropping IPFW_LOCK we can then continue the cleanup protected
     by IPFW_UH_LOCK. So userland still costs O(N) but the kernel side
     is only blocked for O(1).

  4. do not pass pointers to rules through dummynet, netgraph, divert etc,
     but rather pass a <slot, chain_id, rulenum, rule_id> tuple.
     We validate the slot index (in the array of #2) with chain_id,
     and if successful do a O(1) dereference; otherwise, we can find
     the rule in O(log N) through <rulenum, rule_id>

All the above does not change the userland/kernel ABI, though there
are some disgusting casts between pointers and uint32_t

Operation costs now are as follows:

  Function				Old	Now	  Planned
-------------------------------------------------------------------
  + skipto X, non cached		O(N)	O(log N)
  + skipto X, cached			O(1)	O(1)
XXX dynamic rule lookup			O(1)	O(log N)  O(1)
  + skipto tablearg			O(N)	O(1)
  + reinject, non cached		O(N)	O(log N)
  + reinject, cached			O(1)	O(1)
  + kernel blocked during setsockopt()	O(N)	O(1)
-------------------------------------------------------------------

The only (very small) regression is on dynamic rule lookup and this will
be fixed in a day or two, without changing the userland/kernel ABI

Supported by: Valeria Paoli
MFC after:	1 month
2009-12-22 19:01:47 +00:00
John Baldwin
43d9473499 - Rename the __tcpi_(snd|rcv)_mss fields of the tcp_info structure to remove
the leading underscores since they are now implemented.
- Implement the tcpi_rto and tcpi_last_data_recv fields in the tcp_info
  structure.

Reviewed by:	rwatson
MFC after:	2 weeks
2009-12-22 15:47:40 +00:00
Luigi Rizzo
46fdc2bf60 some mostly cosmetic changes in preparation for upcoming work:
+ in many places, replace &V_layer3_chain with a local
  variable chain;
+ bring the counter of rules and static_len within ip_fw_chain
  replacing static variables;
+ remove some spurious comments and extern declaration;
+ document which lock protects certain data structures
2009-12-22 13:53:34 +00:00
Ruslan Ermilov
bec5f27f73 Added proper attribution.
Requested by:	luigi
2009-12-18 17:22:21 +00:00
Luigi Rizzo
1328a38b96 Add some experimental code to log traffic with tcpdump,
similar to pflog(4).
To use the feature, just put the 'log' options on rules
you are interested in, e.g.

	ipfw add 5000 count log ....

and run
	tcpdump -ni ipfw0 ...

net.inet.ip.fw.verbose=0 enables logging to ipfw0,
net.inet.ip.fw.verbose=1 sends logging to syslog as before.

More features can be added, similar to pflog(), to store in
the MAC header metadata such as rule numbers and actions.
Manpage to come once features are settled.
2009-12-17 23:11:16 +00:00
Luigi Rizzo
60ab046a41 simplify and document lookup_next_rule() 2009-12-17 17:27:12 +00:00
Luigi Rizzo
59cd9f65f9 simplify the code that finds the next rule after reinjections
MFC after:	1 week
2009-12-17 12:27:54 +00:00
Luigi Rizzo
53638988bc remove a duplicate sysctl entry 2009-12-16 18:03:35 +00:00
Luigi Rizzo
1b5691c61e bring back a couple of #include that are supplied by nesting,
and explain why they are used.
2009-12-16 13:00:37 +00:00
Luigi Rizzo
97219abf05 Various cosmetic cleanup of the files:
- move global variables around to reduce the scope and make them
  static if possible;
- add an ipfw_ prefix to all public functions to prevent conflicts
  (the same should be done for variables);
- try to pack variable declaration in an uniform way across files;
- clarify some comments;
- remove some misspelling of names (#define V_foo VNET(bar)) that
  slipped in due to cut&paste
- remove duplicate static variables in different files;

MFC after:	1 month
2009-12-16 10:48:40 +00:00
Warner Losh
26bbc1fc5a Quick fix to make this compile:
Remove redundant extern declearations.
If the maintainer has a better fix, then feel free to back this out.
2009-12-16 03:26:37 +00:00
Luigi Rizzo
22f123afad more splitting of ip_fw2.c, now extract the 'table' routines
and the sockopt routines (the upper half of the kernel).

Whoever is the author of the 'table' code (Ruslan/glebius/oleg ?)
please change the attribution in ip_fw_table.c. I have copied
the copyright line from ip_fw2.c but it carries my name and I have
neither written nor designed the feature so I don't deserve
the credit.

MFC after:	1 month
2009-12-15 21:24:12 +00:00
Luigi Rizzo
70228fb346 Start splitting ip_fw2.c and ip_fw.h into smaller components.
At this time we pull out from ip_fw2.c the logging functions, and
support for dynamic rules, and move kernel-only stuff into
netinet/ipfw/ip_fw_private.h

No ABI change involved in this commit, unless I made some mistake.
ip_fw.h has changed, though not in the userland-visible part.

Files touched by this commit:

conf/files
	now references the two new source files

netinet/ip_fw.h
	remove kernel-only definitions gone into netinet/ipfw/ip_fw_private.h.

netinet/ipfw/ip_fw_private.h
	new file with kernel-specific ipfw definitions

netinet/ipfw/ip_fw_log.c
	ipfw_log and related functions

netinet/ipfw/ip_fw_dynamic.c
	code related to dynamic rules

netinet/ipfw/ip_fw2.c
	removed the pieces that goes in the new files

netinet/ipfw/ip_fw_nat.c
	minor rearrangement to remove LOOKUP_NAT from the
	main headers. This require a new function pointer.

A bunch of other kernel files that included netinet/ip_fw.h now
require netinet/ipfw/ip_fw_private.h as well.
Not 100% sure i caught all of them.

MFC after:	1 month
2009-12-15 16:15:14 +00:00
Luigi Rizzo
472099c4b0 implement a new match option,
lookup {dst-ip|src-ip|dst-port|src-port|uid|jail} N

which searches the specified field in table N and sets tablearg
accordingly.
With dst-ip or src-ip the option replicates two existing options.
When used with other arguments, the option can be useful to
quickly dispatch traffic based on other fields.

Work supported by the Onelab project.

MFC after:	1 week
2009-12-15 09:46:27 +00:00
Bjoern A. Zeeb
de0bd6f76b Throughout the network stack we have a few places of
if (jailed(cred))
left.  If you are running with a vnet (virtual network stack) those will
return true and defer you to classic IP-jails handling and thus things
will be "denied" or returned with an error.

Work around this problem by introducing another "jailed()" function,
jailed_without_vnet(), that also takes vnets into account, and permits
the calls, should the jail from the given cred have its own virtual
network stack.

We cannot change the classic jailed() call to do that,  as it is used
outside the network stack as well.

Discussed with:	julian, zec, jamie, rwatson (back in Sept)
MFC after:	5 days
2009-12-13 13:57:32 +00:00
Luigi Rizzo
b2089673e5 use div64 when converting back the burst value for userland 2009-12-10 18:37:14 +00:00
Luigi Rizzo
89717f91ef when draining a flowset free the entire chain, not just one packet. 2009-12-10 18:34:07 +00:00
Luigi Rizzo
478cae8a97 centralize the code to free a packet (or a chain) while in dummynet.
Remove an old macro and its stale comment.
2009-12-10 15:17:34 +00:00
Oleg Bulyzhin
22746035ec Fix burst processing for WF2Q pipes - do not increase available burst size
unless pipe is idle. This should fix follwing issues:
- 'dummynet: OUCH! pipe should have been idle!' log messages.
- exceeding configured pipe bandwidth.

MFC after:	1 week
2009-12-05 23:27:21 +00:00
Luigi Rizzo
f573a0a634 adjust comment in previous commit after Julian's explanation 2009-12-05 11:51:32 +00:00
Luigi Rizzo
bc0d5982e2 remove a dead block of code, document how the ipfw clients are
hooked and the difference in handling the 'enable' variable
for layer2 and layer3. The latter needs fixing once i figure out
how it worked pre-vnet.

MFC after:	7 days
2009-12-05 09:13:06 +00:00
Luigi Rizzo
e99816f1eb fix build with VNET enabled
Reported by: David Wolfskill
2009-12-05 08:32:12 +00:00
Hajimu UMEMOTO
2ea64e8ef9 Use INET_ADDRSTRLEN and INET6_ADDRSTRLEN rather than hard
coded number.

Spotted by:	bz
2009-12-04 15:39:37 +00:00
Luigi Rizzo
4f60c0b97d preparation work to replace the monster switch in ipfw_chk() with
table of functions.

This commit (which is heavily based on work done by Marta Carbone
in this year's GSOC project), removes the goto's and explicit
return from the inner switch(), so we will have a easier time when
putting the blocks into individual functions.

MFC after:	3 weeks
2009-12-03 14:22:15 +00:00
Hajimu UMEMOTO
a22e82b87b Teach an IPv6 to the debug prints. 2009-12-03 11:16:53 +00:00
Luigi Rizzo
3c95089ef4 - initialize src_ip in the main loop to prevent a compiler warning
(gcc 4.x under linux, not sure how real is the complaint).
- rename a macro argument to prevent name clashes.
-  add the macro name on a couple of #endif
- add a blank line for readability.

MFC after:	3 days
2009-12-02 17:50:52 +00:00
Luigi Rizzo
3429911d4d Dispatch sockopt calls to ipfw and dummynet
using the new option numbers, IP_FW3 and IP_DUMMYNET3.
Right now the modules return an error if called with those arguments
so there is no danger of unwanted behaviour.

MFC after:	3 days
2009-12-02 15:50:43 +00:00
Luigi Rizzo
0a13f6b1b3 small changes for portability and diff reduction wrt/ FreeBSD 7.
No functional differences.

- use the div64() macro to wrap 64 bit divisions
  (which almost always are 64 / 32 bits) so they are easier
  to handle with compilers or OS that do not have native
  support for 64bit divisions;

- use a local variable for p_numbytes even if not strictly
  necessary on HEAD, as it reduces diffs with FreeBSD7

- in dummynet_send() check that a tag is present before
  dereferencing the pointer.

- add a couple of blank lines for readability near the end of a function

MFC after:	3 days
2009-12-02 15:20:31 +00:00
Hajimu UMEMOTO
fd63c04193 Teach an IPv6 to send_pkt() and ipfw_tick().
It fixes the issue which keep-alive doesn't work for an IPv6.

PR:		kern/117234
Submitted by:	mlaier, Joost Bekkers <joost__at__jodocus.org>
MFC after:	1 month
2009-12-02 14:32:01 +00:00
Gleb Smirnoff
e81ab87652 Until this moment carp(4) used a strange logging priority. It used debug
priority for such important information as MASTER/BACKUP state change,
and used a normal logging priority for such innocent messages as receiving
short packet (which is a normal VRRP packet between some other routers) or
receving a CARP packet on non-carp interface (someone else running CARP).

This commit shifts message logging priorities to a more sane default.
2009-12-02 13:24:21 +00:00
Luigi Rizzo
de9fc6bcd4 Add new sockopt names for ipfw and dummynet.
This commit is just grabbing entries for the new names
that will be used in the future, so you don't need to
rebuild anything now.

MFC after:	3 days
2009-12-02 10:36:41 +00:00
Luigi Rizzo
9565806f16 change the type of the opcode from enum *:8 to u_int8_t
so the size and alignment of the ipfw_insn is not compiler dependent.
No changes in the code generated by gcc.

There was only one instance of this kind in our entire source tree,
so i suspect the old definition was a poor choice (which i made).

MFC after:	3 days
2009-12-02 08:52:06 +00:00
Michael Tuexen
dec7fa27c6 Use the default stack size for the iterator thread.
This fixes a crash reported by Irene Ruengeler.

Approved by: rrs (mentor)
MFC after: 1 month
2009-11-27 17:25:19 +00:00
Bruce M Simpson
a8cf681de2 Correct a comment.
MFC after:	1 day
2009-11-19 13:21:37 +00:00
Michael Tuexen
7e6206af12 Fix a bug where the system panics when a SHUTDOWN is received with an
illegal TSN.

Approved by: rrs (mentor)
MFC after: ASAP
2009-11-18 12:17:06 +00:00
Michael Tuexen
0e891bcdc1 Get rid of unused fields addr_over which is never really used,
only copied around.

Approved by: rrs (mentor)
2009-11-17 23:03:38 +00:00
Michael Tuexen
83fc1165c5 Use always LIST_EMPTY instead of sometime SCTP_LIST_EMPTY,
which is defined as LIST_EMPTY.

Approved by: rrs (mentor)
MFC after: 1 month
2009-11-17 20:56:14 +00:00
Michael Tuexen
2ab6846a23 Fix a bug where queued ASCONF messags are not sent out.
Approved by: rrs (mentor)
Obtained from:	Irene Ruengeler
MFC after: 1 month
2009-11-17 13:36:21 +00:00
Michael Tuexen
b6c5780299 Fix a memory leak when destroying an SCTP stack.
Clean up sctp_pcb_finish().
Approved by: rrs (mentor)
MFC after: 1 month
2009-11-17 13:13:58 +00:00
Michael Tuexen
87b4fcd323 Do not start the iterator when there are no associations.
This fixes a bug found by Irene Ruengeler.

Approved by: rrs (mentor)
MFC after: 1 month
2009-11-17 13:11:23 +00:00
Michael Tuexen
1e01164145 Disable (temporary) the thread based interator. It does not work with vnet.
Approved by: rrs (mentor)
2009-11-17 13:09:50 +00:00
Michael Tuexen
cf458c646d Allow the UMA to free data. This resolves the UMA related bug reported
by Julian.

Approved by: rrs (mentor)
MFC after: 1 month
2009-11-17 13:08:15 +00:00
Michael Tuexen
7a9b5b2040 Do not hold the lock longer than necessary.
Approved by: rrs (mentor)
MFC after: 1 month
2009-11-17 13:05:51 +00:00
Bruce M Simpson
793c70425a Fix a functional regression in multicast.
Userland daemons need to see IGMP traffic regardless of the group;
omit the imo filter check if the proto is IGMP. The kernel part
of IGMP will have already filtered appropriately at this point.

MFC after:      ASAP
Submitted by:   Franz Struwig
Reported by:    Ivor Prebeg, Franz Struwig
2009-11-15 11:07:22 +00:00
Attilio Rao
758801232c Move inet_aton() (specular to inet_ntoa(), already present in libkern)
into libkern in order to made it usable by other modules than alias_proxy.

Obtained from:	Sandvine Incorporated
Sponsored by:	Sandvine Incorporated
MFC:		1 week
2009-11-12 00:46:28 +00:00
Edward Tomasz Napierala
4f7418a09f Remove ifdefed out part of code, which seems to have originated a decade ago
in OpenBSD.  As it is now, there is no way for this to be useful, since IPsec
is free to forward packets via whatever interface it wants, so checking
capabilities of the interface passed from ip_output (fetched from the routing
table) serves no purpose.

Discussed with:	sam@
2009-11-09 19:53:34 +00:00
Oleg Bulyzhin
57edc1bbf3 style(9): add missing parentheses 2009-11-09 09:12:45 +00:00
John Baldwin
c6d9480519 Several years ago a feature was added to TCP that casued soreceive() to
send an ACK right away if data was drained from a TCP socket that had
previously advertised a zero-sized window.  The current code requires the
receive window to be exactly zero for this to kick in.  If window scaling is
enabled and the window is smaller than the scale, then the effective window
that is advertised is zero.  However, in that case the zero-sized window
handling is not enabled because the window is not exactly zero.  The fix
changes the code to check the raw window value against zero.

Reviewed by:	bz
MFC after:	1 week
2009-11-06 16:55:05 +00:00
Oleg Bulyzhin
5661377e37 Fix two issues that can lead to exceeding configured pipe bandwidth:
- do not expire queues which are not ready to be expired.
- properly calculate available burst size.

MFC after:	3 days
2009-11-03 08:41:14 +00:00
Michael Tuexen
08abf6399a Improve round robin stream scheduler and cleanup some code.
Approved by: rrs (mentor)
MFC after: 3 days
2009-10-29 17:40:33 +00:00
Christian Brueffer
621882f0bc Close a stream file descriptor leak.
PR:		138130
Submitted by:	Patroklos Argyroudis <argp@census-labs.com>
MFC after:	1 week
2009-10-28 12:10:29 +00:00
Michael Tuexen
d18f7e0a98 Bugfix: Use formula from section 7.2.3 of RFC 4960. Reported by Martin Becke.
Approved by: rrs (mentor)
MFC after: 3 days
2009-10-27 18:17:07 +00:00
Michael Tuexen
ac9bce0f3b Improve the round robin stream scheduler.
Approved by: rrs (mentor)
MFC after: 3 days
2009-10-26 19:23:34 +00:00
Robert Watson
99b96cf934 Correct spelling typo in ip_input comment.
Pointed out by:	N.J. Mann <njm at njm.me.uk>,
		John Nielsen <john at jnielsen.net>, julian (!), lstewart
MFC after:	2 days
2009-10-24 09:18:26 +00:00
Qing Li
6cb2b4e7a8 Use the correct option name in the preprocessor command to enable
or disable diagnostic messages.

Reviewed by:	ru
MFC after:	3 days
2009-10-23 18:27:34 +00:00
Robert Watson
0d3d0d74ea Improve grammar in ip_input comment while attempting to maintain what
might be its meaning.

MFC after:	3 days
2009-10-23 13:35:00 +00:00
Qing Li
fc02323563 In the ARP callout timer expiration function, the current time_second
is compared against the entry expiration time value (that was set based
on time_second) to check if the current time is larger than the set
expiration time. Due to the +/- timer granularity value, the comparison
returns false, causing the alternative code to be executed. The
alternative code path freed the memory without removing that entry
from the table list, causing a use-after-free bug.

Reviewed by:	discussed with kmacy
MFC after:	immediately
Verified by:	rnoland, yongari
2009-10-20 17:55:42 +00:00
Robert Watson
6426657e9f Rewrap ip_input() comment so that it prints more nicely.
MFC after:	3 days
2009-10-18 11:23:56 +00:00
Qing Li
93704ac5d7 This patch fixes the following issues in the ARP operation:
1. There is a regression issue in the ARP code. The incomplete
   ARP entry was timing out too quickly (1 second timeout), as
   such, a new entry is created each time arpresolve() is called.
   Therefore the maximum attempts made is always 1. Consequently
   the error code returned to the application is always 0.
2. Set the expiration of each incomplete entry to a 20-second
   lifetime.
3. Return "incomplete" entries to the application.

Reviewed by:	kmacy
MFC after:	3 days
2009-10-15 06:12:04 +00:00
Bjoern A. Zeeb
852da713c3 Compare pointer to NULL rather than 0.
MFC after:	1 month
2009-10-13 20:29:14 +00:00
Michael Tuexen
f71e78a1d9 Fix a race condition where a mutex was destroyed while sleeping on it.
Found while analyzing a report from julian. It might fix his bug.
Approved by: rrs (mentor)
MFC after: 3 days
2009-10-11 12:23:56 +00:00
Julian Elischer
0b4b0b0fee Virtualize the pfil hooks so that different jails may chose different
packet filters. ALso allows ipfw to be enabled on on ejail and disabled
on another. In 8.0 it's a global setting.

Sitting aroung in tree waiting to commit for: 2 months
MFC after:	2 months
2009-10-11 05:59:43 +00:00
Michael Tuexen
45623593fb Correct include order as indicated by bz.
Approved by: re (mentor)
MFC after: 3 days
2009-10-10 13:59:18 +00:00
Michael Tuexen
3b1de911e0 Do not include vnet.h twice.
Approved by: rrs (mentor)
MFC after: 3 days
2009-10-09 19:30:23 +00:00
Michael Tuexen
9dd512290c Use correct arguments when calling SCTP_RTALLOC().
Approved by: rrs (mentor)
MFC after: 0 days
2009-10-08 20:33:12 +00:00
Randall Stewart
806a5b8414 Fix so that round robing stream scheduling works as advertised
MFC after:	0 days
2009-10-08 11:36:06 +00:00
Robert Watson
f681a5fdd4 Remove tcp_input lock statistics; these are intended for debugging only
and are not intended to ship in 8.0 as they dirty additional cache
lines in a performance-critical per-packet path.

MFC after:	3 days
2009-10-06 20:35:41 +00:00
Robert Watson
883e9bc41d In tcp_input(), we acquire a global write lock at first only if a
segment is likely to trigger a TCP state change (i.e., FIN/RST/SYN).
If we later have to upgrade the lock, we acquire an inpcb reference
and drop both global/inpcb locks before reacquiring in-order.  In
that gap, the connection may transition into TIMEWAIT, so we need
to loop back and reevaluate the inpcb after relocking.

MFC after:	3 days
Reported by:	Kamigishi Rei <spambox at haruhiism.net>
Reviewed by:	bz
2009-10-05 22:24:13 +00:00
Qing Li
b4a22c365c Remove a log message from production code. This log message can be
triggered by a misconfigured host that is sending out gratuious ARPs.
This log message can also be triggered during a network renumbering
event when multiple prefixes co-exist on a single network segment.

MFC after:	immediately
2009-10-02 01:45:11 +00:00
Qing Li
fa3cfd39ff Previously, if an address alias is configured on an interface, and
this address alias has a prefix matching that of another address
configured on the same interface, then the ARP entry for the alias
is not deleted from the ARP table when that address alias is removed.
This patch fixes the aforementioned issue.

PR:		kern/139113
MFC after:	3 days
2009-10-02 01:34:55 +00:00
Michael Tuexen
4b6492f5ab Fix handling of sctp_drain().
Approved by: rrs (mentor)
MFC after: 2 month
2009-09-20 11:33:39 +00:00
Michael Tuexen
2c19e7fa86 Fix errnos.
Approved by: rrs(mentor)
MFC after: 3 days.
2009-09-20 11:32:22 +00:00
Michael Tuexen
4af6c75c39 Use appropriate locking when using interface list.
Approved by: rrs (mentor)
MFC after: 1 month.
2009-09-19 14:55:12 +00:00
Michael Tuexen
30c3a8430c Fix the disabling of sctp_drain().
Approved by: rrs (mentor)
MFC after: 1 month.
2009-09-19 14:18:42 +00:00
Michael Tuexen
8518270e20 Get SCTP working in combination with VIMAGE.
Contains code from bz.
Approved by: rrs (mentor)
MFC after: 1 month.
2009-09-19 14:02:16 +00:00
Bruce M Simpson
99bf30cf01 Return ENOBUFS consistently if user attempts to exceed
in_mcast_maxsocksrc resource limit.

Submitted by:	syrinx
MFC after:	3 days
2009-09-18 15:12:31 +00:00
Randall Stewart
482444b4a5 Support for VNET in SCTP (hopefully) 2009-09-17 15:11:12 +00:00
Michael Tuexen
d830c305ea Fix a bug reported by Daniel Mentz:
When authenticating DATA chunks some DATA chunks
might get stuck when the MTU gets decreased via
an ICMP message.

Approved by: rrs (mentor)
MFC after: immediately
2009-09-16 14:23:31 +00:00
Mike Silbersack
b8614722ff Add the ability to see TCP timers via netstat -x. This can be a useful
feature when you have a seemingly stuck socket and want to figure
out why it has not been closed yet.

No plans to MFC this, as it changes the netstat sysctl ABI.

Reviewed by:	andre, rwatson, Eric Van Gyzen
2009-09-16 05:33:15 +00:00
Andre Oppermann
11c99a6d7b -Put the optimized soreceive_stream() under a compile time option called
TCP_SORECEIVE_STREAM for the time being.

Requested by:	brooks

Once compiled in make it easily switchable for testers by using a tuneable
 net.inet.tcp.soreceive_stream
and a corresponding read-only sysctl to report the current state.

Suggested by:	rwatson

MFC after:	2 days
2009-09-15 22:23:45 +00:00
Qing Li
9bb7d0f47a Self pointing routes are installed for configured interface addresses
and address aliases. After an interface is brought down and brought
back up again, those self pointing routes disappeared. This patch
ensures after an interface is brought back up, the loopback routes
are reinstalled properly.

Reviewed by:	bz
MFC after:	immediately
2009-09-15 19:18:34 +00:00
Qing Li
cd29a7797d This patch enables the node to respond to ARP requests for
configured proxy ARP entries.

Reviewed by:	bz
MFC after:	immediately
2009-09-15 18:39:27 +00:00
Qing Li
96ed1732bb The bootp code installs an interface address and the nfs client
module tries to install the same address again. This extra code
is removed, which was discovered by the removal of a call to
in_ifscrub() in r196714. This call to in_ifscrub is put back here
because the SIOCAIFADDR command can be used to change the prefix
length of an existing alias.

Reviewed by:    kmacy
2009-09-15 01:01:03 +00:00
Qing Li
f0bb05fca5 Previously local end of point-to-point interface is not reachable
within the system that owns the interface. Packets destined to
the local end point leak to the wire towards the default gateway
if one exists. This behavior is changed as part of the L2/L3
rewrite efforts. The local end point is now reachable within the
system. The inpcb code needs to consider this fact during the
address selection process.

Reviewed by:	bz
MFC after:	immediately
2009-09-14 22:19:47 +00:00
Randall Stewart
f3d06a3c68 Fixes two bugs:
1) A lock issue, if we ever had to try again
   we would double lock the INP lock.
2) We were allowing (at wrap) associd 0... which really
   we cannot allow since 0 normally means in most socket
   API calls that we are wishing to effect something on
   the INP not TCB.

MFC after:	1 week
2009-09-13 17:45:31 +00:00
Bruce M Simpson
6cbbe26f98 In expire_mfc(), add an assert on the multicast forwarding cache mutex.
PR:		138666
2009-09-13 01:00:24 +00:00
Bruce M Simpson
fa2eebfce6 Comment some flawed assumptions in inp_join_group() about
mixing SSM full-state and delta-based APIs.

ENOTIME to fix right now.  No functional changes.

MFC after:	5 days
2009-09-12 20:37:44 +00:00
Bruce M Simpson
0eebc0d7b4 Don't allow joins w/o source on an existing group.
This is almost always pilot error.

We don't need to check for group filter UNDEFINED state at t1,
because we only ever allocate filters with their groups, so we
unconditionally reject such calls with EINVAL.
Trying to change the active filter mode w/o going through IP_MSFILTER
is also disallowed.

Deals with the case described in PR 137164 upfront, cumulative
with the fix in svn rev 197132 which only calls imo_match_source()
if the source address family was not unspecified.

PR:		137164
MFC after:	5 days
2009-09-12 20:18:23 +00:00
Bruce M Simpson
1fc39d5424 Tighten input checking in inp_join_group():
* Don't try to use the source address, when its family is unspecified.
 * If we get a join without a source, on an existing inclusive
   mode group, this is an error, as it would change the filter mode.

Fix a problem with the handling of in_mfilter for new memberships:
 * Do not rely on imf being NULL; it is explicitly initialized to a
   non-NULL pointer when constructing a membership.
 * Explicitly initialize *imf to EX mode when the source address
   is unspecified.

This fixes a problem with in_mfilter slot recycling in the join path.

PR:		138690
Submitted by:	Stef Walter
MFC after:	5 days
2009-09-12 19:45:55 +00:00
Bruce M Simpson
cc5776b24d Fix an obvious logic error in the IPv4 multicast leave processing,
where the filter mode vector was not updated correctly after the leave.

PR:		138691
Submitted by:	Stef Walter
MFC after:	5 days
2009-09-12 19:07:03 +00:00
Bruce M Simpson
67e89408e5 Fix an API issue in leave processing for IPv4 multicast groups.
* Do not assume that the group lookup performed by imo_match_group()
   is valid when ifp is NULL in this case.
 * Instead, return EADDRNOTAVAIL if the ifp cannot be resolved for the
   membership we are being asked to leave.

Caveat user:
 * The way IPv4 multicast memberships are implemented in the inpcb layer
   at the moment, has the side-effect that struct ip_moptions will
   still hold the membership, under the old ifp, until ip_freemoptions()
   is called for the parent inpcb.
 * The underlying issue is: the inpcb layer does not get notification
   of ifp being detached going away in a thread-safe manner.
   This is non-trivial to fix.

But hey, at least the kernel should't panic when you unplug a card.

PR:		138689
Submitted by:	Stef Walter
MFC after:	5 days
2009-09-12 18:55:15 +00:00
Navdeep Parhar
9a31144537 Add arp_update_event. This replaces route_arp_update_event, which
has not worked since the arp-v2 rewrite.

The event handler will be called with the llentry write-locked and
can examine la_flags to determine whether the entry is being added
or removed.

Reviewed by:	gnn, kmacy
Approved by:	gnn (mentor)
MFC after:	1 month
2009-09-08 21:17:17 +00:00
Poul-Henning Kamp
2ac047d1fe Move the duplicate definition of struct sockaddr_storage to its own
include file, and include this where the previous duplicate definitions were.

Static program checkers like FlexeLint rightfully take a dim view of
duplicate definitions, even if they currently are identical.
2009-09-08 10:39:38 +00:00
Shteryana Shopova
e72ae6eafd When joining a multicast group, the inp_lookup_mcast_ifp call
does a KASSERT that the group address is multicast, so the
check if this is indeed true and eventually return a EINVAL if not,
should be done before calling inp_lookup_mcast_ifp. This fixes a kernel
crash when calling setsockopt (sock, IPPROTO_IP, IP_ADD_MEMBERSHIP,...)
with invalid group address.

Reviewed by:	bms
Approved by:	bms

MFC after:	3 days
2009-09-07 16:00:33 +00:00
Pawel Jakub Dawidek
360488410f Correct comment. 2009-09-06 07:29:22 +00:00
George V. Neville-Neil
54fc657d59 Add ARP statistics to the kernel and netstat.
New counters now exist for:
requests sent
replies sent
requests received
replies received
packets received
total packets dropped due to no ARP entry
entrys timed out
Duplicate IPs seen

The new statistics are seen in the netstat command
when it is given the -s command line switch.

MFC after:	2 weeks
In collaboration with: bz
2009-09-03 21:10:57 +00:00
Bjoern A. Zeeb
cc7e9d4325 In case an upper layer protocol tries to send a packet but the
L2 code does not have the ethernet address for the destination
within the broadcast domain in the table, we remember the
original mbuf in `la_hold' in arpresolve() and send out a
different packet with an arp request.
In case there will be more upper layer packets to send we will
free an earlier one held in `la_hold' and queue the new one.

Once we get a packet in, with which we can perfect our arp table
entry we send out the original 'on hold' packet, should there
be any.
Rather than continuing to process the packet that we received,
we returned without freeing the packet that came in, which
basically means that we leaked an mbuf for every arp request
we sent.

Rather than freeing the received packet and returning, continue
to process the incoming arp packet as well.
This should (a) improve some setups, also proxy-arp, in case it was an
incoming arp request and (b) resembles the behaviour FreeBSD had
from day 1, which alignes with RFC826 "Packet reception" (merge case).

Rename 'm0' to 'hold' to make the code more understandable as
well as diffable to earlier versions more easily.

Handle the link-layer entry 'la' lock comepletely in the block
where needed and release it as early as possible, rather than
holding it longer, down to the end of the function.

Found by:			pointyhat, ns1
Bug hunting session with:	erwin, simon, rwatson
Tested by:			simon on cluster machines
Reviewed by:			ratson, kmacy, julian
MFC after:			3 days
2009-09-01 17:53:01 +00:00
Qing Li
1bf38b1292 This patch fixes the following issues:
- Routing messages are not generated when adding and removing
  interface address aliases.
- Loopback route installed for an interface address alias is
  not deleted from the routing table when that address alias
  is removed from the associated interface.
- Function in_ifscrub() is called extraneously.

Reviewed by:	gnn, kmacy, sam
MFC after:	3 days
2009-08-31 21:02:48 +00:00
Michael Tuexen
2b77dd0181 Fix a bug where vlan interfaces are not supported by SCTP.
Approved by: rrs (mentor)
MFC after: 3 days
2009-08-28 08:41:59 +00:00
Qing Li
0437a93339 Do not try to free the rt_lle entry of the cached route in
ip_output() if the cached route was not initialized from the
flow-table. The rt_lle entry is invalid unless it has been
initialized through the flow-table.

Reviewed by:	kmacy, rwatson
MFC after:	immediately
2009-08-28 05:37:31 +00:00
Robert Watson
dc56e98f0d Use locks specific to the lltable code, rather than borrow the ifnet
list/index locks, to protect link layer address tables.  This avoids
lock order issues during interface teardown, but maintains the bug that
sysctl copy routines may be called while a non-sleepable lock is held.

Reviewed by:	bz, kmacy
MFC after:	3 days
2009-08-25 09:52:38 +00:00
Michael Tuexen
24ae5c4a73 This fixes a bug where the value set by SCTP_PARTIAL_DELIVERY_POINT
was not honored, if the socket buffer size was not 4 times that large.

Approved by: rrs (mentor)
MFC after: 3 days.
2009-08-24 11:46:40 +00:00
Randall Stewart
0fa753b3fb This fixes two bugs in the NR-Sack code:
1) When calculating the table offset for sliding the sack
    array, the two byte values must be "ored" together in order
    for us to do the correct sliding of the arrays.
 2) We were NOT properly doing CC and other changes to things only
    NR-Sacked. The solution here is to make a separate function that
    will actually do both CC/updates and free things if its NR sack'd.
    This actually shrinks out common code from three places (much better).

MFC after:	3 days
2009-08-24 11:13:32 +00:00
Marko Zec
2b73aacaf9 Introduce a div_destroy() function which takes over per-vnet cleanup tasks
from the existing modevent / MOD_UNLOAD handler, and register div_destroy()
in protosw as per-vnet .pr_destroy() handler for options VIMAGE builds.  In
nooptions VIMAGE builds, div_destroy() will be invoked from the modevent
handler, resulting in effectively identical operation as it was prior this
change.  div_destroy() also tears down hashtables used by ipdivert, which
were previously left behind on ipdivert kldunloads.

For options VIMAGE builds only, temporarily disable kldunloading of ipdivert,
because without introducing additional locking logic it is impossible to
atomically check whether all ipdivert instances in all vnets are idle, and
proceed with cleanup without opening a race window for a vnet to open an
ipdivert socket while ipdivert tear-down is in progress.

While here, staticize div_init(), because it is not used outside of
ip_divert.c.

In cooperation with:	julian
Approved by:	re (rwatson), julian (mentor)
MFC after:	3 days
2009-08-24 10:06:02 +00:00
Robert Watson
77dfcdc445 Rework global locks for interface list and index management, correcting
several critical bugs, including race conditions and lock order issues:

Replace the single rwlock, ifnet_lock, with two locks, an rwlock and an
sxlock.  Either can be held to stablize the lists and indexes, but both
are required to write.  This allows the list to be held stable in both
network interrupt contexts and sleepable user threads across sleeping
memory allocations or device driver interactions.  As before, writes to
the interface list must occur from sleepable contexts.

Reviewed by:	bz, julian
MFC after:	3 days
2009-08-23 20:40:19 +00:00
Julian Elischer
d3cef1d91e Fix another typo right next to the previous one, that amazingly, I did
not see before.

MFC after:	 1 week
2009-08-23 08:49:32 +00:00
Julian Elischer
8f26c03fe6 Fix typo in comment that has been bugging me for days.
MFC after:	1 week
2009-08-23 07:59:28 +00:00
Julian Elischer
c4b21cbe4a Fix ipfw's initialization functions to get the correct order of evaluation
to allow vnet and non vnet operation. Move some functions from ip_fw_pfil.c
to ip_fw2.c and mode to mostly using the SYSINIT and VNET_SYSINIT handlers
instead of the modevent handler. Correct some spelling errors in comments
in the affected code. Note this bug fixes a crash in NON VIMAGE kernels when
ipfw is unloaded.

This patch is a minimal patch for 8.0
I have a much larger patch that actually fixes the underlying problems
that will be applied after 8.0

Reviewed by:	zec@, rwatson@, bz@(earlier version)
Approved by:	re (rwatson)
MFC after:	Immediatly
2009-08-21 11:20:10 +00:00
Peter Wemm
b4e7e7a065 Fix signed comparison bug when ticks goes negative after 24 days of
uptime.  This causes the tcp time_wait state code to fail to expire
sockets in timewait state.

Approved by:	re (kensmith)
2009-08-20 22:53:28 +00:00
Will Andrews
52e12426d1 Fix CARP memory leaks on carp_if's malloc'd using M_CARP. This occurs when
CARP tries to free them using M_IFADDR after the last address for a virtual
host is removed and when detaching from the parent interface.

Reviewed by:	mlaier
Approved by:	re (kib), ken (mentor)
2009-08-20 02:33:12 +00:00
Michael Tuexen
2f99457b0c Fix a bug in the handling of unreliable messages
which results in stalled associations.

Approved by: re, rrs (mentor)
MFC after: immediately
2009-08-19 12:02:28 +00:00
Kip Macy
3ee42584f9 - change the interface to flowtable_lookup so that we don't rely on
the mbuf for obtaining the fib index
 - check that a cached flow corresponds to the same fib index as the
   packet for which we are doing the lookup
 - at interface detach time flush any flows referencing stale rtentrys
   associated with the interface that is going away (fixes reported
   panics)
 - reduce the time between cleans in case the cleaner is running at
   the time the eventhandler is called and the wakeup is missed less
   time will elapse before the eventhandler returns
 - separate per-vnet initialization from global initialization
   (pointed out by jeli@)

Reviewed by:	sam@
Approved by:	re@
2009-08-18 20:28:58 +00:00
Michael Tuexen
627dfd6df9 Fix a crash when using one-to-one stlye socket in non-blocking
mode and there is no listening server.
PR: 137795
Approved by: re, rrs (mentor)
MFC after:immediately.
2009-08-18 19:58:49 +00:00
Michael Tuexen
810ec53688 * Fix a bug where PR-SCTP settings are ignore when using implicit
association setup.
* Fix a bug where message with illegal stream ids are not deleted.
* Fix a crash when reporting back unsent messages from the send_queue.
* Fix a bug related to INIT retransmission when the socket is already
  closed.
* Fix a bug where associations were stalled when partial delivery API
  was enabled.
* Fix a bug where the receive buffer size was smaller than the
  partial_delivery_point.

Approved by: re, rrs (mentor)
MFC after: One day.
2009-08-15 21:10:52 +00:00
Qing Li
3ef5e21d01 In function ip_output(), the cached route is flushed when there is a
mismatch between the cached entry and the intended destination. The
cached rtentry{} is flushed but the associated llentry{} is not. This
causes the wrong destination MAC address being used in the output
packets. The fix is to flush the llentry{} when rtentry{} is cleared.

Reviewed by:	kmacy, rwatson
Approved by:	re
2009-08-14 23:44:59 +00:00
Marko Zec
f92ae4d706 SCTP is not yet compatible with options VIMAGE kernels although it compiles
with VIMAGE defined, so explicitly disallow building such kernels.

Reviewed by:	rrs
Approved by:	re (rwatson), julian (mentor)
2009-08-14 22:43:25 +00:00
Julian Elischer
72034f5548 Fix ipfw crash on uid or gid check.
Receiving any ip packet for which there is no existing socket will
crash if ipfw has a uid or gid test rule, as the uid/gid
of the non existent owner of said non existent socket is tested.
Brooks introduced this error as part of his >16 gids patch.
It appears to be a cut-n-paste error from similar code a few lines
before. The old code used the 'pcb' variable here, but in the
new code that switched the 'inp' variable, which is often NULL
and what is tested in the code further up. The rest of the multi-gid
patch for ipfw seems solid (and cleaner than previous code).

Reviewed by:	brooks
Approved by:	re (rwatson)
2009-08-14 10:09:45 +00:00
Robert Watson
9d2eb78bcb Add padding to struct inpcb, missed during our padding sweep earlier in
the release cycle.

Approved by:	re (kensmith)
2009-08-02 22:47:08 +00:00
Robert Watson
315e3e38fa Many network stack subsystems use a single global data structure to hold
all pertinent statatistics for the subsystem.  These structures are
sometimes "borrowed" by kernel modules that require a place to store
statistics for similar events.

Add KPI accessor functions for statistics structures referenced by kernel
modules so that they no longer encode certain specifics of how the data
structures are named and stored.  This change is intended to make it
easier to move to per-CPU network stats following 8.0-RELEASE.

The following modules are affected by this change:

      if_bridge
      if_cxgb
      if_gif
      ip_mroute
      ipdivert
      pf

In practice, most of these statistics consumers should, in fact, maintain
their own statistics data structures rather than borrowing structures
from the base network stack.  However, that change is too agressive for
this point in the release cycle.

Reviewed by:	bz
Approved by:	re (kib)
2009-08-02 19:43:32 +00:00
Robert Watson
530c006014 Merge the remainder of kern_vimage.c and vimage.h into vnet.c and
vnet.h, we now use jails (rather than vimages) as the abstraction
for virtualization management, and what remained was specific to
virtual network stacks.  Minor cleanups are done in the process,
and comments updated to reflect these changes.

Reviewed by:	bz
Approved by:	re (vimage blanket)
2009-08-01 19:26:27 +00:00
Xin LI
16e324fc56 Show interface name which received short CARP packet (e.g. a VRRP packet),
in order to match other codepaths nearby.  This makes troubleshooting
easier.

Approved by:	re (kib)
MFC after:	1 month
2009-07-30 17:40:47 +00:00
Julian Elischer
3d1001cb11 Startup the vnet part of initialization a bit after the global part.
Fixes crash on boot if ipfw compiled in.

Submitted by:	tegge@
Reviewed by:	tegge@
Approved by:	re (kib)
2009-07-28 19:58:07 +00:00
Julian Elischer
7973fba3a4 Somewhere along the line accept sockets stopped honoring the
FIB selected for them. Fix this.

Reviewed by:	ambrisko
Approved by:	re (kib)
MFC after:	3 days
2009-07-28 19:43:27 +00:00
Michael Tuexen
bf3d517756 Fix a bug where wrong initialization value
in used for an SCTP specific sysctl variable.

Approved by: re, rrs(mentor).
MFC after: 2 weeks.
2009-07-28 15:07:41 +00:00
Randall Stewart
cfde3ff70b Turns out that when a receiver forwards through its TNS's the
processing code holds the read lock (when processing a
FWD-TSN for pr-sctp). If it finds stranded data that
can be given to the application, it calls sctp_add_to_readq().
The readq function also grabs this lock. So if INVAR is on
we get a double recurse on a non-recursive lock and panic.

This fix will change it so that readq() function gets a
flag to tell if the lock is held, if so then it does not
get the lock.

Approved by:	re@freebsd.org (Kostik Belousov)
MFC after:	1 week
2009-07-28 14:09:06 +00:00
Qing Li
df813b7ea2 This patch does the following:
- Allow loopback route to be installed for address assigned to
      interface of IFF_POINTOPOINT type.
    - Install loopback route for an IPv4 interface addreess when the
      "useloopback" sysctl variable is enabled. Similarly, install
      loopback route for an IPv6 interface address when the sysctl variable
      "nd6_useloopback" is enabled. Deleting loopback routes for interface
      addresses is unconditional in case these sysctl variables were
      disabled after an interface address has been assigned.

Reviewed by:	bz
Approved by:	re
2009-07-27 17:08:06 +00:00
Michael Tuexen
8e71b6947a Fix the handling of unordered messages when using
PR-SCTP.

Approved by: re, rrs (mentor)
MFC after: 3 weeks.
2009-07-27 13:41:45 +00:00
Michael Tuexen
4420d9a062 Get rid of unused field. This will also be deleted
in the official speciication of the SCTP socket API.

Approved by:re, rrs (mentor)
2009-07-27 12:09:32 +00:00
Michael Tuexen
47a490cbbc Add a missing unlock for the inp lock when
returning early from sctp_add_to_readq().

Approved by: re, rrs (mentor)
MFC after: 2 weeks.
2009-07-26 15:06:59 +00:00
Julian Elischer
9d85f50ad5 Catch ipfw up to the rest of the vimage code.
It got left behind when it moved to its new location.

Approved by:	re (kensmith)
2009-07-25 06:42:42 +00:00
Robert Watson
d0728d7174 Introduce and use a sysinit-based initialization scheme for virtual
network stacks, VNET_SYSINIT:

- Add VNET_SYSINIT and VNET_SYSUNINIT macros to declare events that will
  occur each time a network stack is instantiated and destroyed.  In the
  !VIMAGE case, these are simply mapped into regular SYSINIT/SYSUNINIT.
  For the VIMAGE case, we instead use SYSINIT's to track their order and
  properties on registration, using them for each vnet when created/
  destroyed, or immediately on module load for already-started vnets.
- Remove vnet_modinfo mechanism that existed to serve this purpose
  previously, as well as its dependency scheme: we now just use the
  SYSINIT ordering scheme.
- Implement VNET_DOMAIN_SET() to allow protocol domains to declare that
  they want init functions to be called for each virtual network stack
  rather than just once at boot, compiling down to DOMAIN_SET() in the
  non-VIMAGE case.
- Walk all virtualized kernel subsystems and make use of these instead
  of modinfo or DOMAIN_SET() for init/uninit events.  In some cases,
  convert modular components from using modevent to using sysinit (where
  appropriate).  In some cases, do minor rejuggling of SYSINIT ordering
  to make room for or better manage events.

Portions submitted by:	jhb (VNET_SYSINIT), bz (cleanup)
Discussed with:		jhb, bz, julian, zec
Reviewed by:		bz
Approved by:		re (VIMAGE blanket)
2009-07-23 20:46:49 +00:00
Bjoern A. Zeeb
a08362ce46 sysctl_msec_to_ticks is used with both virtualized and
non-vrtiualized sysctls so we cannot used one common function.

Add a macro to convert the arg1 in the virtualized case to
vnet.h to not expose the maths to all over the code.

Add a wrapper for the single virtualized call, properly handling
arg1 and call the default implementation from there.

Convert the two over places to use the new macro.

Reviewed by:	rwatson
Approved by:	re (kib)
2009-07-21 21:58:55 +00:00
Robert Watson
a511354af4 Back out the moving in r195782 of V_ip_id's initialization from the top
back to the bottom of ip_init() as found in 7.x.  I missed the fact that
the bottom half of the init routine only runs in the !VNET case.

Submitted by:	zec
Approved by:	re (vimage blanket)
2009-07-20 19:40:09 +00:00
Robert Watson
0a4747d4d0 Garbage collect vnet module registrations that have neither constructors
nor destructors, as there's no actual work to do.

In most cases, the constructors weren't needed because of the existing
protocol initialization functions run by net_init_domain() as part of
VNET_MOD_NET, or they were eliminated when support for static
initialization of virtualized globals was added.

Garbage collect dependency references to modules without constructors or
destructors, notably VNET_MOD_INET and VNET_MOD_INET6.

Reviewed by:	bz
Approved by:	re (vimage blanket)
2009-07-20 13:55:33 +00:00
Robert Watson
5ee847d3ac Reimplement and/or implement vnet list locking by replacing a mostly
unused custom mutex/condvar-based sleep locks with two locks: an
rwlock (for non-sleeping use) and sxlock (for sleeping use).  Either
acquired for read is sufficient to stabilize the vnet list, but both
must be acquired for write to modify the list.

Replace previous no-op read locking macros, used in various places
in the stack, with actual locking to prevent race conditions.  Callers
must declare when they may perform unbounded sleeps or not when
selecting how to lock.

Refactor vnet sysinits so that the vnet list and locks are initialized
before kernel modules are linked, as the kernel linker will use them
for modules loaded by the boot loader.

Update various consumers of these KPIs based on whether they may sleep
or not.

Reviewed by:	bz
Approved by:	re (kib)
2009-07-19 14:20:53 +00:00
Robert Watson
1e77c1056a Remove unused VNET_SET() and related macros; only VNET_GET() is
ever actually used.  Rename VNET_GET() to VNET() to shorten
variable references.

Discussed with:	bz, julian
Reviewed by:	bz
Approved by:	re (kensmith, kib)
2009-07-16 21:13:04 +00:00
Robert Watson
eddfbb763d Build on Jeff Roberson's linker-set based dynamic per-CPU allocator
(DPCPU), as suggested by Peter Wemm, and implement a new per-virtual
network stack memory allocator.  Modify vnet to use the allocator
instead of monolithic global container structures (vinet, ...).  This
change solves many binary compatibility problems associated with
VIMAGE, and restores ELF symbols for virtualized global variables.

Each virtualized global variable exists as a "reference copy", and also
once per virtual network stack.  Virtualized global variables are
tagged at compile-time, placing the in a special linker set, which is
loaded into a contiguous region of kernel memory.  Virtualized global
variables in the base kernel are linked as normal, but those in modules
are copied and relocated to a reserved portion of the kernel's vnet
region with the help of a the kernel linker.

Virtualized global variables exist in per-vnet memory set up when the
network stack instance is created, and are initialized statically from
the reference copy.  Run-time access occurs via an accessor macro, which
converts from the current vnet and requested symbol to a per-vnet
address.  When "options VIMAGE" is not compiled into the kernel, normal
global ELF symbols will be used instead and indirection is avoided.

This change restores static initialization for network stack global
variables, restores support for non-global symbols and types, eliminates
the need for many subsystem constructors, eliminates large per-subsystem
structures that caused many binary compatibility issues both for
monitoring applications (netstat) and kernel modules, removes the
per-function INIT_VNET_*() macros throughout the stack, eliminates the
need for vnet_symmap ksym(2) munging, and eliminates duplicate
definitions of virtualized globals under VIMAGE_GLOBALS.

Bump __FreeBSD_version and update UPDATING.

Portions submitted by:  bz
Reviewed by:            bz, zec
Discussed with:         gnn, jamie, jeff, jhb, julian, sam
Suggested by:           peter
Approved by:            re (kensmith)
2009-07-14 22:48:30 +00:00
Lawrence Stewart
91a5ebde45 Fix a race in the manipulation of the V_tcp_sack_globalholes global variable,
which is currently not protected by any type of lock. When triggered, the bug
would sometimes cause a panic when the TCP activity to an affected machine
eventually slowed during a lull. The panic only occurs if INVARIANTS is compiled
into the kernel, and has laid dormant for some time as a result of INVARIANTS
being off by default except in FreeBSD-CURRENT.

Switch to atomic operations in the locations where the variable is changed.
Reads have not been updated to be protected by atomics, so there is a
possibility of accounting errors in any given calculation where the variable is
read. This is considered unlikely to occur in the wild, and will not cause
serious harm on rare occasions where it does.

Thanks to Robert Watson for debugging help.

Reported by:	Kamigishi Rei <spambox at haruhiism dot net>
Tested by:	Kamigishi Rei <spambox at haruhiism dot net>
Reviewed by:	silby
Approved by:	re (rwatson), kensmith (mentor temporarily unavailable)
2009-07-13 11:59:38 +00:00
Lawrence Stewart
237fbe0a1c Replace struct tcpopt with a proxy toeopt struct in the TOE driver interface to
the TCP syncache. This returns struct tcpopt to being private within the TCP
implementation, thus allowing it to be modified without ABI concerns.

The patch breaks the ABI. Bump __FreeBSD_version to 800103 accordingly. The cxgb
driver is the only TOE consumer affected by this change, and needs to be
recompiled along with the kernel.

Suggested by:	rwatson
Reviewed by:	rwatson, kmacy
Approved by:	re (kensmith), kensmith (mentor temporarily unavailable)
2009-07-13 11:51:02 +00:00
Lawrence Stewart
962ebef8c0 Pad the following TCP related structs to allow MFCs of upcoming features/fixes
back to the 8 branch:

tcp_var.h
- struct sackhint
- struct tcpcb
- struct tcpstat

The patch breaks the ABI. Bump __FreeBSD_version to 800102 accordingly. User
space tools that rely on the size of any of these structs (e.g. sockstat) need
to be recompiled.

Reviewed by:	rpaulo, sam, andre, rwatson
Approved by:	re & mentor (gnn)
2009-07-12 09:14:28 +00:00
Robert Watson
6c8615603b Update various IPFW-related modules to use if_addr_rlock()/
if_addr_runlock() rather than IF_ADDR_LOCK()/IF_ADDR_UNLOCK().

MFC after:	6 weeks
2009-06-26 00:46:50 +00:00
Robert Watson
d1da0a0672 Add address list locking for in6_ifaddrhead/ia_link: as with locking
for in_ifaddrhead, we stick with an rwlock for the time being, which
we will revisit in the future with a possible move to rmlocks.

Some pieces of code require significant further reworking to be
safe from all classes of writer-writer races.

Reviewed by:	bz
MFC after:	6 weeks
2009-06-25 16:35:28 +00:00
Robert Watson
64aeca7b42 Initialize in_ifaddr_lock using RW_SYSINIT() instead of in ip_init(),
so that it doesn't run multiple times if VIMAGE is being used.

Discussed with:	bz
MFC after:	6 weeks
2009-06-25 14:44:00 +00:00
Robert Watson
2d9cfabad4 Add a new global rwlock, in_ifaddr_lock, which will synchronize use of the
in_ifaddrhead and INADDR_HASH address lists.

Previously, these lists were used unsynchronized as they were effectively
never changed in steady state, but we've seen increasing reports of
writer-writer races on very busy VPN servers as core count has gone up
(and similar configurations where address lists change frequently and
concurrently).

For the time being, use rwlocks rather than rmlocks in order to take
advantage of their better lock debugging support.  As a result, we don't
enable ip_input()'s read-locking of INADDR_HASH until an rmlock conversion
is complete and a performance analysis has been done.  This means that one
class of reader-writer races still exists.

MFC after:      6 weeks
Reviewed by:    bz
2009-06-25 11:52:33 +00:00
Oleg Bulyzhin
6882bf4d92 - fix dummynet 'fast' mode for WF2Q case.
- fix printing of pipe profile data.
- introduce new pipe parameter: 'burst' - how much data can be sent through
  pipe bypassing bandwidth limit.
2009-06-24 22:57:07 +00:00
Robert Watson
32187eb6d9 Fix CARP build.
Reported by:	bz
2009-06-24 21:34:38 +00:00
Robert Watson
80af0152f3 Convert netinet6 to using queue(9) rather than hand-crafted linked lists
for the global IPv6 address list (in6_ifaddr -> in6_ifaddrhead).  Adopt
the code styles and conventions present in netinet where possible.

Reviewed by:	gnn, bz
MFC after:	6 weeks (possibly not MFCable?)
2009-06-24 21:00:25 +00:00
Robert Watson
f8574c7a22 Add missing unlock of if_addr_mtx when an unmatched ARP packet is received.
Reported by:	lstewart
MFC after:	6 weeks
2009-06-24 14:49:26 +00:00
Robert Watson
19e5b0a797 Clear 'ia' after iterating if_addrhead for unicast address matching: since
'ifa' was used as the TAILQ_FOREACH() iterator argument, and 'ia' was just
derived form it, it could be left non-NULL which confused later
conditional freeing code.  This could cause kernel panics if multicast IP
packets were received.  [1]

Call 'struct in_ifaddr *' in ip_rtaddr() 'ia', not 'ifa' in keeping with
normal conventions.

When 'ipstealth' is enabled returns from ip_input early, properly release
the 'ia' reference.

Reported by:	lstewart, sam [1]
MFC after:	6 weeks
2009-06-24 14:29:40 +00:00
Robert Watson
09d547787f In ARP input, more consistently acquire and release ifaddr references.
MFC after:	6 weeks
2009-06-24 10:33:35 +00:00
Bjoern A. Zeeb
88d166bf19 Make callers to in6_selectsrc() and in6_pcbladdr() pass in memory
to save the selected source address rather than returning an
unreferenced copy to a pointer that might long be gone by the
time we use the pointer for anything meaningful.

Asked for by:	rwatson
Reviewed by:	rwatson
2009-06-23 22:08:55 +00:00
Robert Watson
8c0fec805f Modify most routines returning 'struct ifaddr *' to return references
rather than pointers, requiring callers to properly dispose of those
references.  The following routines now return references:

  ifaddr_byindex
  ifa_ifwithaddr
  ifa_ifwithbroadaddr
  ifa_ifwithdstaddr
  ifa_ifwithnet
  ifaof_ifpforaddr
  ifa_ifwithroute
  ifa_ifwithroute_fib
  rt_getifa
  rt_getifa_fib
  IFP_TO_IA
  ip_rtaddr
  in6_ifawithifp
  in6ifa_ifpforlinklocal
  in6ifa_ifpwithaddr
  in6_ifadd
  carp_iamatch6
  ip6_getdstifaddr

Remove unused macro which didn't have required referencing:

  IFP_TO_IA6

This closes many small races in which changes to interface
or address lists while an ifaddr was in use could lead to use of freed
memory (etc).  In a few cases, add missing if_addr_list locking
required to safely acquire references.

Because of a lack of deep copying support, we accept a race in which
an in6_ifaddr pointed to by mbuf tags and extracted with
ip6_getdstifaddr() doesn't hold a reference while in transmit.  Once
we have mbuf tag deep copy support, this can be fixed.

Reviewed by:	bz
Obtained from:	Apple, Inc. (portions)
MFC after:	6 weeks (portions)
2009-06-23 20:19:09 +00:00
Bjoern A. Zeeb
5736e6fb9d After cleaning up rt_tables from vnet.h and cleaning up opt_route.h
a lot of files no longer need route.h either. Garbage collect them.
While here remove now unneeded vnet.h #includes as well.
2009-06-23 17:03:45 +00:00
Andre Oppermann
ef760e6ad2 Add soreceive_stream(), an optimized version of soreceive() for
stream (TCP) sockets.

It is functionally identical to generic soreceive() but has a
number stream specific optimizations:
o does only one sockbuf unlock/lock per receive independent of
  the length of data to be moved into the uio compared to
  soreceive() which unlocks/locks per *mbuf*.
o uses m_mbuftouio() instead of its own copy(out) variant.
o much more compact code flow as a large number of special
  cases is removed.
o much improved reability.

It offers significantly reduced CPU usage and lock contention
when receiving fast TCP streams.  Additional gains are obtained
when the receiving application is using SO_RCVLOWAT to batch up
some data before a read (and wakeup) is done.

This function was written by "reverse engineering" and is not
just a stripped down variant of soreceive().

It is not yet enabled by default on TCP sockets.  Instead it is
commented out in the protocol initialization in tcp_usrreq.c
until more widespread testing has been done.

Testers, especially with 10GigE gear, are welcome.

MFP4:	r164817 //depot/user/andre/soreceive_stream/
2009-06-22 23:08:05 +00:00
Marko Zec
fa057b15bd V_irtualize flowtable state.
This change should make options VIMAGE kernel builds usable again,
to some extent at least.

Note that the size of struct vnet_inet has changed, though in
accordance with one-bump-per-day policy we didn't update the
__FreeBSD_version number, given that it has already been touched
by r194640 a few hours ago.
Reviewed by:	bz
Approved by:	julian (mentor)
2009-06-22 21:19:24 +00:00
Robert Watson
8896f83a58 Add a new function, ifa_ifwithaddr_check(), which rather than returning
a pointer to an ifaddr matching the passed socket address, returns a
boolean indicating whether one was present.  In the (near) future,
ifa_ifwithaddr() will return a referenced ifaddr rather than a raw
ifaddr pointer, and the new wrapper will allow callers that care only
about the boolean condition to avoid having to free that reference.

MFC after:	3 weeks
2009-06-22 10:59:34 +00:00
Bjoern A. Zeeb
173de0f9cc Remove a hack from r186086 so that IPsec via loopback routes continued
working. It was targeted for stable/7 compatibility and actually never
did anything in HEAD.

Reminded by:	rwatson
X-MFC after:	never
2009-06-22 09:24:46 +00:00
Robert Watson
1099f828b3 Clean up common ifaddr management:
- Unify reference count and lock initialization in a single function,
  ifa_init().
- Move tear-down from a macro (IFAFREE) to a function ifa_free().
- Move reference count bump from a macro (IFAREF) to a function ifa_ref().
- Instead of using a u_int protected by a mutex to refcount(9) for
  reference count management.

The ifa_mtx is now used for exactly one ioctl, and possibly should be
removed.

MFC after:	3 weeks
2009-06-21 19:30:33 +00:00
Roman Divacky
e40bae9a45 Switch cmd argument to u_long. This matches what if_ethersubr.c does and
allows the code to compile cleanly on amd64 with clang.

Reviewed by:	rwatson
Approved by:	ed (mentor)
2009-06-21 10:29:31 +00:00
Brooks Davis
838d985825 Rework the credential code to support larger values of NGROUPS and
NGROUPS_MAX, eliminate ABI dependencies on them, and raise the to 1024
and 1023 respectively.  (Previously they were equal, but under a close
reading of POSIX, NGROUPS_MAX was defined to be too large by 1 since it
is the number of supplemental groups, not total number of groups.)

The bulk of the change consists of converting the struct ucred member
cr_groups from a static array to a pointer.  Do the equivalent in
kinfo_proc.

Introduce new interfaces crcopysafe() and crsetgroups() for duplicating
a process credential before modifying it and for setting group lists
respectively.  Both interfaces take care for the details of allocating
groups array. crsetgroups() takes care of truncating the group list
to the current maximum (NGROUPS) if necessary.  In the future,
crsetgroups() may be responsible for insuring invariants such as sorting
the supplemental groups to allow groupmember() to be implemented as a
binary search.

Because we can not change struct xucred without breaking application
ABIs, we leave it alone and introduce a new XU_NGROUPS value which is
always 16 and is to be used or NGRPS as appropriate for things such as
NFS which need to use no more than 16 groups.  When feasible, truncate
the group list rather than generating an error.

Minor changes:
  - Reduce the number of hand rolled versions of groupmember().
  - Do not assign to both cr_gid and cr_groups[0].
  - Modify ipfw to cache ucreds instead of part of their contents since
    they are immutable once referenced by more than one entity.

Submitted by:	Isilon Systems (initial implementation)
X-MFC after:	never
PR:		bin/113398 kern/133867
2009-06-19 17:10:35 +00:00
Bjoern A. Zeeb
ebd8672cc3 Add explicit includes for jail.h to the files that need them and
remove the "hidden" one from vimage.h.
2009-06-17 15:01:01 +00:00
Bjoern A. Zeeb
7654a365db Add the explicit include of vimage.h to another five .c files still
missing it.

Remove the "hidden" kernel only include of vimage.h from ip_var.h added
with the very first Vimage commit r181803 to avoid further kernel poisoning.
2009-06-17 12:44:11 +00:00
Randall Stewart
d50c1d79d0 Changes to the NR-Sack code so that:
1) All bit disappears
2) The two sets of gaps (nr and non-nr) are
   disjointed, you don't have gaps struck in
   both places.

This adjusts us to coorespond to the new draft. Still
to-do, cleanup the code so that there are only one set
of sack routines (original NR-Sack done by E cloned all
sack code).
2009-06-17 12:34:56 +00:00
John Baldwin
6b0c5521b5 Trim extra sets of ()'s.
Requested by:	bde
2009-06-16 19:00:48 +00:00
John Baldwin
6dfb8b316c Fix edge cases with ticks wrapping from INT_MAX to INT_MIN in the handling
of the per-tcpcb t_badtrxtwin.

Submitted by:	bde
2009-06-16 19:00:12 +00:00
John Baldwin
9f78a87a06 - Change members of tcpcb that cache values of ticks from int to u_int:
t_rcvtime, t_starttime, t_rtttime, t_bw_rtttime, ts_recent_age,
  t_badrxtwin.
- Change t_recent in struct timewait from u_long to u_int32_t to match
  the type of the field it shadows from tcpcb: ts_recent.
- Change t_starttime in struct timewait from u_long to u_int to match
  the t_starttime field in tcpcb.

Requested by:	bde (1, 3)
2009-06-16 18:58:50 +00:00
Jamie Gritton
9ed47d01eb Get vnets from creds instead of threads where they're available, and from
passed threads instead of curthread.

Reviewed by:	zec, julian
Approved by:	bz (mentor)
2009-06-15 19:01:53 +00:00
Oleg Bulyzhin
1917ef996d Since dn_pipe.numbytes is int64_t now - remove unnecessary overflow detection
code in ready_event_wfq().
2009-06-15 17:14:47 +00:00
Bjoern A. Zeeb
53be8fca00 Move the kernel option FLOWTABLE chacking from the header file to the
actual implementation.
Remove the accessor functions for the compiled out case, just returning
"unavail" values. Remove the kernel conditional from the header file as
it is no longer needed, only leaving the externs.
Hide the improperly virtualized SYSCTL/TUNABLE for the flowtable size
under the kernel option as well.

Reviewed by:	rwatson
2009-06-12 20:46:36 +00:00
VANHULLEBUS Yvan
7b495c4494 Added support for NAT-Traversal (RFC 3948) in IPsec stack.
Thanks to (no special order) Emmanuel Dreyfus (manu@netbsd.org), Larry
Baird (lab@gta.com), gnn, bz, and other FreeBSD devs, Julien Vanherzeele
(julien.vanherzeele@netasq.com, for years of bug reporting), the PFSense
team, and all people who used / tried the NAT-T patch for years and
reported bugs, patches, etc...

X-MFC: never

Reviewed by:	bz
Approved by:	gnn(mentor)
Obtained from:	NETASQ
2009-06-12 15:44:35 +00:00
John Baldwin
a13c655c64 Correct printf format type mismatches. 2009-06-11 14:37:18 +00:00
John Baldwin
1a0e7cfc42 Trim extra ()'s.
Submitted by:	bde
2009-06-11 14:36:13 +00:00
John Baldwin
0e8cc7e748 Change a few members of tcpcb that store cached copies of ticks to be ints
instead of unsigned longs.  This fixes a few overflow edge cases on 64-bit
platforms.  Specifically, if an idle connection receives a packet shortly
before 2^31 clock ticks of uptime (about 25 days with hz=1000) and the keep
alive timer fires after 2^31 clock ticks, the keep alive timer will think
that the connection has been idle for a very long time and will immediately
drop the connection instead of sending a keep alive probe.

Reviewed by:	silby, gnn, lstewart
MFC after:	1 week
2009-06-10 18:27:15 +00:00
Warner Losh
f61c07e12d These are no longer referenced in the tree, so can be safely removed.
Reviewed by:	bms@
2009-06-10 18:12:15 +00:00
Luigi Rizzo
6167e6c88f in ip_dn_ctl(), do not allocate a large structure on the stack,
and use malloc() instead if/when it is necessary.

The problem is less relevant in previous versions because
the variable involved (tmp_pipe) is much smaller there.
Still worth fixing though.

Submitted by:	Marta Carbone (GSOC)
MFC after:	3 days
2009-06-10 10:47:31 +00:00
Bjoern A. Zeeb
d93a13cb23 Remove the "The option TCPDEBUG requires option INET." requirement.
In case of !INET we will not have a timestamp on the trace for now
but that might only affect spx debugging as long as INET6 requires
INET.

Reviewed by:	rwatson (earlier version)
2009-06-10 10:39:41 +00:00
Luigi Rizzo
1a5d0c2bf0 small simplifications to the code in charge of reaping deleted rules:
- clear the head pointer immediately before using it, so there is
  no chance of mistakes;
- call reap_rules() unconditionally. The function can handle a NULL
  argument just fine, and the cost of the extra call is hardly
  significant given that we do it rarely and outside the lock.

MFC after:	3 days
2009-06-10 10:34:59 +00:00
Oleg Bulyzhin
dda10d624c Close long existed race with net.inet.ip.fw.one_pass = 0:
If packet leaves ipfw to other kernel subsystem (dummynet, netgraph, etc)
it carries pointer to matching ipfw rule. If this packet then reinjected back
to ipfw, ruleset processing starts from that rule. If rule was deleted
meanwhile, due to existed race condition panic was possible (as well as
other odd effects like parsing rules in 'reap list').

P.S. this commit changes ABI so userland ipfw related binaries should be
recompiled.

MFC after:	1 month
Tested by:	Mikolaj Golub
2009-06-09 21:27:11 +00:00
Bjoern A. Zeeb
8d8bc0182e After r193232 rt_tables in vnet.h are no longer indirectly dependent on
the ROUTETABLES kernel option thus there is no need to include opt_route.h
anymore in all consumers of vnet.h and no longer depend on it for module
builds.

Remove the hidden include in flowtable.h as well and leave the two
explicit #includes in ip_input.c and ip_output.c.
2009-06-08 19:57:35 +00:00
Marko Zec
bc29160df3 Introduce an infrastructure for dismantling vnet instances.
Vnet modules and protocol domains may now register destructor
functions to clean up and release per-module state.  The destructor
mechanisms can be triggered by invoking "vimage -d", or a future
equivalent command which will be provided via the new jail framework.

While this patch introduces numerous placeholder destructor functions,
many of those are currently incomplete, thus leaking memory or (even
worse) failing to stop all running timers.  Many of such issues are
already known and will be incrementaly fixed over the next weeks in
smaller incremental commits.

Apart from introducing new fields in structs ifnet, domain, protosw
and vnet_net, which requires the kernel and modules to be rebuilt, this
change should have no impact on nooptions VIMAGE builds, since vnet
destructors can only be called in VIMAGE kernels.  Moreover,
destructor functions should be in general compiled in only in
options VIMAGE builds, except for kernel modules which can be safely
kldunloaded at run time.

Bump __FreeBSD_version to 800097.
Reviewed by:	bz, julian
Approved by:	rwatson, kib (re), julian (mentor)
2009-06-08 17:15:40 +00:00
Hiroki Sato
dbe5926046 Fix and add a workaround on an issue of EtherIP packet with reversed
version field sent via gif(4)+if_bridge(4).  The EtherIP
implementation found on FreeBSD 6.1, 6.2, 6.3, 7.0, 7.1, and 7.2 had
an interoperability issue because it sent the incorrect EtherIP
packets and discarded the correct ones.

This change introduces the following two flags to gif(4):

 accept_rev_ethip_ver: accepts both correct EtherIP packets and ones
    with reversed version field, if enabled.  If disabled, the gif
    accepts the correct packets only.  This flag is enabled by
    default.

 send_rev_ethip_ver: sends EtherIP packets with reversed version field
    intentionally, if enabled.  If disabled, the gif sends the correct
    packets only.  This flag is disabled by default.

These flags are stored in struct gif_softc and can be set by
ifconfig(8) on per-interface basis.

Note that this is an incompatible change of EtherIP with the older
FreeBSD releases.  If you need to interoperate older FreeBSD boxes and
new versions after this commit, setting "send_rev_ethip_ver" is
needed.

Reviewed by:	thompsa and rwatson
Spotted by:	Shunsuke SHINOMIYA
PR:		kern/125003
MFC after:	2 weeks
2009-06-07 23:00:40 +00:00
Marko Zec
403f4aa059 Unbreak options VIMAGE build.
Submitted by:	julian (mentor)
Approved by:	julian (mentor)
2009-06-06 12:43:13 +00:00
Pawel Jakub Dawidek
42a3613305 Only four out of nine arguments for ip_ipsec_output() are actually used.
Kill unused arguments except for 'ifp' as it might be used in the future
for detecting IPsec-capable interfaces.
2009-06-05 23:53:17 +00:00
Luigi Rizzo
908e960ea6 move kernel ipfw-related sources to a separate directory,
adjust conf/files and modules' Makefiles accordingly.

No code or ABI changes so this and most of previous related
changes can be easily MFC'ed

MFC after:	5 days
2009-06-05 19:22:47 +00:00
Luigi Rizzo
b87ce5545b Several ipfw options and actions use a 16-bit argument to indicate
pipes, queues, tags, rule numbers and so on.
These are all different namespaces, and the only thing they have in
common is the fact they use a 16-bit slot to represent the argument.

There is some confusion in the code, mostly for historical reasons,
on how the values 0 and 65535 should be used. At the moment, 0 is
forbidden almost everywhere, while 65535 is used to represent a
'tablearg' argument, i.e. the result of the most recent table() lookup.

For now, try to use explicit constants for the min and max allowed
values, and do not overload the default rule number for that.

Also, make the MTAG_IPFW declaration only visible to the kernel.

NOTE: I think the issue needs to be revisited before 8.0 is out:
the 2^16 namespace limit for rule numbers and pipe/queue is
annoying, and we can easily bump the limit to 2^32 which gives
a lot more flexibility in partitioning the namespace.

MFC after:	5 days
2009-06-05 16:16:07 +00:00
Robert Watson
bcf11e8d00 Move "options MAC" from opt_mac.h to opt_global.h, as it's now in GENERIC
and used in a large number of files, but also because an increasing number
of incorrect uses of MAC calls were sneaking in due to copy-and-paste of
MAC-aware code without the associated opt_mac.h include.

Discussed with:	pjd
2009-06-05 14:55:22 +00:00
Robert Watson
88a9a9a61c Unifdef MAC label pointer in syncache entries -- in general, ifdef'd
structure contents are a bad idea in the kernel for binary
compatibility reasons, and this is a single pointer that is now included
in compiles by default anyway due to options MAC being in GENERIC.
2009-06-05 14:31:03 +00:00
Luigi Rizzo
115a40c7bf More cleanup in preparation of ipfw relocation (no actual code change):
+ move ipfw and dummynet hooks declarations to raw_ip.c (definitions
  in ip_var.h) same as for most other global variables.
  This removes some dependencies from ip_input.c;

+ remove the IPFW_LOADED macro, just test ip_fw_chk_ptr directly;

+ remove the DUMMYNET_LOADED macro, just test ip_dn_io_ptr directly;

+ move ip_dn_ruledel_ptr to ip_fw2.c which is the only file using it;

To be merged together with rev 193497

MFC after:	5 days
2009-06-05 13:44:30 +00:00
Luigi Rizzo
b4043122fa Small changes (no actual code changes) in preparation of moving ipfw-related
stuff to its own directory, and cleaning headers and dependencies:

In this commit:
+ remove one use of a typedef;
+ document dn_rule_delete();
+ replace one usage of the DUMMYNET_LOADED macro with its value;

No MFC planned until the cleanup is complete.
2009-06-05 12:49:54 +00:00
Luigi Rizzo
c421791e77 fix a bug introduced in rev.190865 related to the signedness
of the credit of a pipe. On passing, also use explicit
signed/unsigned types for two other fields.
Noticed by Oleg Bulyzhin and Maxim Ignatenko long ago,
i forgot to commit the fix.

Does not affect RELENG_7.
2009-06-04 12:27:57 +00:00
Robert Watson
3de4046939 Continue work to optimize performance of "options MAC" when no MAC policy
modules are loaded by avoiding mbuf label lookups when policies aren't
loaded, pushing further socket locking into MAC policy modules, and
avoiding locking MAC ifnet locks when no policies are loaded:

- Check mac_policies_count before looking for mbuf MAC label m_tags in MAC
  Framework entry points.  We will still pay label lookup costs if MAC
  policies are present but don't require labels (typically a single mbuf
  header field read, but perhaps further indirection if IPSEC or other
  m_tag consumers are in use).

- Further push socket locking for socket-related access control checks and
  events into MAC policies from the MAC Framework, so that sockets are
  only locked if a policy specifically requires a lock to protect a label.
  This resolves lock order issues during sonewconn() and also in local
  domain socket cross-connect where multiple socket locks could not be
  held at once for the purposes of propagatig MAC labels across multiple
  sockets.  Eliminate mac_policy_count check in some entry points where it
  no longer avoids locking.

- Add mac_policy_count checking in some entry points relating to network
  interfaces that otherwise lock a global MAC ifnet lock used to protect
  ifnet labels.

Obtained from:	TrustedBSD Project
2009-06-03 18:46:28 +00:00
Robert Watson
f93bfb23dc Add internal 'mac_policy_count' counter to the MAC Framework, which is a
count of the number of registered policies.

Rather than unconditionally locking sockets before passing them into MAC,
lock them in the MAC entry points only if mac_policy_count is non-zero.

This avoids locking overhead for a number of socket system calls when no
policies are registered, eliminating measurable overhead for the MAC
Framework for the socket subsystem when there are no active policies.

Possibly socket locks should be acquired by policies if they are required
for socket labels, which would further avoid locking overhead when there
are policies but they don't require labeling of sockets, or possibly
don't even implement socket controls.

Obtained from:	TrustedBSD Project
2009-06-02 18:26:17 +00:00
John Baldwin
74fb0ba732 Rework socket upcalls to close some races with setup/teardown of upcalls.
- Each socket upcall is now invoked with the appropriate socket buffer
  locked.  It is not permissible to call soisconnected() with this lock
  held; however, so socket upcalls now return an integer value.  The two
  possible values are SU_OK and SU_ISCONNECTED.  If an upcall returns
  SU_ISCONNECTED, then the soisconnected() will be invoked on the
  socket after the socket buffer lock is dropped.
- A new API is provided for setting and clearing socket upcalls.  The
  API consists of soupcall_set() and soupcall_clear().
- To simplify locking, each socket buffer now has a separate upcall.
- When a socket upcall returns SU_ISCONNECTED, the upcall is cleared from
  the receive socket buffer automatically.  Note that a SO_SND upcall
  should never return SU_ISCONNECTED.
- All this means that accept filters should now return SU_ISCONNECTED
  instead of calling soisconnected() directly.  They also no longer need
  to explicitly clear the upcall on the new socket.
- The HTTP accept filter still uses soupcall_set() to manage its internal
  state machine, but other accept filters no longer have any explicit
  knowlege of socket upcall internals aside from their return value.
- The various RPC client upcalls currently drop the socket buffer lock
  while invoking soreceive() as a temporary band-aid.  The plan for
  the future is to add a new flag to allow soreceive() to be called with
  the socket buffer locked.
- The AIO callback for socket I/O is now also invoked with the socket
  buffer locked.  Previously sowakeup() would drop the socket buffer
  lock only to call aio_swake() which immediately re-acquired the socket
  buffer lock for the duration of the function call.

Discussed with:	rwatson, rmacklem
2009-06-01 21:17:03 +00:00
Bjoern A. Zeeb
c2c2a7c11e Convert the two dimensional array to be malloced and introduce
an accessor function to get the correct rnh pointer back.

Update netstat to get the correct pointer using kvm_read()
as well.

This not only fixes the ABI problem depending on the kernel
option but also permits the tunable to overwrite the kernel
option at boot time up to MAXFIBS, enlarging the number of
FIBs without having to recompile. So people could just use
GENERIC now.

Reviewed by:	julian, rwatson, zec
X-MFC:		not possible
2009-06-01 15:49:42 +00:00
Bruce M Simpson
b01c90a31a Merge fixes from p4:
* Tighten v1 query input processing.
 * Borrow changes from MLDv2 for how general queries are processed.
   * Do address field validation upfront before accepting input.
   * Do NOT switch protocol version if old querier present timer active.
 * Always clear IGMPv3 state in igmp_v3_cancel_link_timers().
 * Update comments.

Tested by:	deeptech71 at gmail dot com
2009-06-01 15:30:18 +00:00
Robert Watson
d4b5cae49b Reimplement the netisr framework in order to support parallel netisr
threads:

- Support up to one netisr thread per CPU, each processings its own
  workstream, or set of per-protocol queues.  Threads may be bound
  to specific CPUs, or allowed to migrate, based on a global policy.

  In the future it would be desirable to support topology-centric
  policies, such as "one netisr per package".

- Allow each protocol to advertise an ordering policy, which can
  currently be one of:

  NETISR_POLICY_SOURCE: packets must maintain ordering with respect to
    an implicit or explicit source (such as an interface or socket).

  NETISR_POLICY_FLOW: make use of mbuf flow identifiers to place work,
    as well as allowing protocols to provide a flow generation function
    for mbufs without flow identifers (m2flow).  Falls back on
    NETISR_POLICY_SOURCE if now flow ID is available.

  NETISR_POLICY_CPU: allow protocols to inspect and assign a CPU for
    each packet handled by netisr (m2cpuid).

- Provide utility functions for querying the number of workstreams
  being used, as well as a mapping function from workstream to CPU ID,
  which protocols may use in work placement decisions.

- Add explicit interfaces to get and set per-protocol queue limits, and
  get and clear drop counters, which query data or apply changes across
  all workstreams.

- Add a more extensible netisr registration interface, in which
  protocols declare 'struct netisr_handler' structures for each
  registered NETISR_ type.  These include name, handler function,
  optional mbuf to flow ID function, optional mbuf to CPU ID function,
  queue limit, and ordering policy.  Padding is present to allow these
  to be expanded in the future.  If no queue limit is declared, then
  a default is used.

- Queue limits are now per-workstream, and raised from the previous
  IFQ_MAXLEN default of 50 to 256.

- All protocols are updated to use the new registration interface, and
  with the exception of netnatm, default queue limits.  Most protocols
  register as NETISR_POLICY_SOURCE, except IPv4 and IPv6, which use
  NETISR_POLICY_FLOW, and will therefore take advantage of driver-
  generated flow IDs if present.

- Formalize a non-packet based interface between interface polling and
  the netisr, rather than having polling pretend to be two protocols.
  Provide two explicit hooks in the netisr worker for start and end
  events for runs: netisr_poll() and netisr_pollmore(), as well as a
  function, netisr_sched_poll(), to allow the polling code to schedule
  netisr execution.  DEVICE_POLLING still embeds single-netisr
  assumptions in its implementation, so for now if it is compiled into
  the kernel, a single and un-bound netisr thread is enforced
  regardless of tunable configuration.

In the default configuration, the new netisr implementation maintains
the same basic assumptions as the previous implementation: a single,
un-bound worker thread processes all deferred work, and direct dispatch
is enabled by default wherever possible.

Performance measurement shows a marginal performance improvement over
the old implementation due to the use of batched dequeue.

An rmlock is used to synchronize use and registration/unregistration
using the framework; currently, synchronized use is disabled
(replicating current netisr policy) due to a measurable 3%-6% hit in
ping-pong micro-benchmarking.  It will be enabled once further rmlock
optimization has taken place.  However, in practice, netisrs are
rarely registered or unregistered at runtime.

A new man page for netisr will follow, but since one doesn't currently
exist, it hasn't been updated.

This change is not appropriate for MFC, although the polling shutdown
handler should be merged to 7-STABLE.

Bump __FreeBSD_version.

Reviewed by:	bz
2009-06-01 10:41:38 +00:00
Pawel Jakub Dawidek
f44270e764 - Rename IP_NONLOCALOK IP socket option to IP_BINDANY, to be more consistent
with OpenBSD (and BSD/OS originally). We can't easly do it SOL_SOCKET option
  as there is no more space for more SOL_SOCKET options, but this option also
  fits better as an IP socket option, it seems.
- Implement this functionality also for IPv6 and RAW IP sockets.
- Always compile it in (don't use additional kernel options).
- Remove sysctl to turn this functionality on and off.
- Introduce new privilege - PRIV_NETINET_BINDANY, which allows to use this
  functionality (currently only unjail root can use it).

Discussed with:	julian, adrian, jhb, rwatson, kmacy
2009-06-01 10:30:00 +00:00
Randall Stewart
a16ccdcead Adds missing sysctl to manage the vtag_time_wait time. This will
even allow disabling time-wait all together if you set the value
to 0 (not advisable actually). The default remains the same
i.e. 60 seconds.
2009-05-30 11:14:41 +00:00
Randall Stewart
bf1be57101 Fix a small memory leak from the nr-sack code - the mapping array
was not being freed at term of association. Also get rid of
the MICHAELS_EXP code.
2009-05-30 10:56:27 +00:00
Randall Stewart
667d2d3cbb Make sctp_uio user to kernel structure match the
socket-api draft. Two fields were uint32_t when they
should have been uint16_t.

Reported by Jonathan Leighton at U-del.
2009-05-30 10:50:40 +00:00
Zachary Loafman
81ad7eb017 Correct handling of SYN packets that are to the left of the current window of an ESTABLISHED connection.
Reviewed by:        net@, gnn
Approved by:        dfr (mentor)
2009-05-27 17:02:10 +00:00
Jamie Gritton
0304c73163 Add hierarchical jails. A jail may further virtualize its environment
by creating a child jail, which is visible to that jail and to any
parent jails.  Child jails may be restricted more than their parents,
but never less.  Jail names reflect this hierarchy, being MIB-style
dot-separated strings.

Every thread now points to a jail, the default being prison0, which
contains information about the physical system.  Prison0's root
directory is the same as rootvnode; its hostname is the same as the
global hostname, and its securelevel replaces the global securelevel.
Note that the variable "securelevel" has actually gone away, which
should not cause any problems for code that properly uses
securelevel_gt() and securelevel_ge().

Some jail-related permissions that were kept in global variables and
set via sysctls are now per-jail settings.  The sysctls still exist for
backward compatibility, used only by the now-deprecated jail(2) system
call.

Approved by:	bz (mentor)
2009-05-27 14:11:23 +00:00
Edward Tomasz Napierala
efbad25934 Don't discard packets with 'Destination Unreachable' at the beginning
of ip_forward(), if the IPSEC is compiled in.  It is possible that there
is an SPD that this packets will go through, even if there is no matching
route.  If not, ICMP will be sent anyway, after ip_output().

This is somewhat similar in purpose to r191621, except that one was
for the packets sent from the host, while this one is for packets
being forwarded by the host.

Reviewed by:	bz@
Sponsored by:	Wheel Sp. z o.o. (http://www.wheel.pl)
2009-05-27 12:44:36 +00:00
John Baldwin
256d7a8a16 Correct the sense of a test so that this filter always waits for the full
request to arrive.  Previously it would end up returning as soon as the
request length stored in the first two bytes had arrived.

Reviewed by:	dwmalone
MFC after:	1 week
2009-05-26 20:00:30 +00:00
Robert Watson
cce6e15556 Remove comment about moving tcp_reass() to its own file named tcp_reass.c,
that happened a while ago.

MFC after:	3 days
2009-05-25 14:51:47 +00:00
Bjoern A. Zeeb
6d453b1001 For UDP with introducing the UDP control block, the uma zone had to
be named "udp_inpcb" to avoid a naming conflict with tcp[1].
For consistency rename the uma zone for TCP from "inpcb" to "tcp_inpcb".

Found by:	rwatson [1]
Discussed with:	rwatson
2009-05-23 17:02:30 +00:00
Bjoern A. Zeeb
6a9148fe92 Implement UDP control block support.
So far the udp_tun_func_t had been (ab)using inp_ppcb for udp in kernel
tunneling callbacks.  Move that into the udpcb and add a field for flags
there to be used by upcoming changes instead of sticking udp only flags
into in_pcb flags2.

Bump __FreeBSD_version for ports to detect it and because of vnet* struct
size changes.

Submitted by:	jhb (7.x version)
Reviewed by:	rwatson
2009-05-23 16:51:13 +00:00
Bjoern A. Zeeb
db2e47925e Add sysctls to toggle the behaviour of the (former) IPSEC_FILTERTUNNEL
kernel option.
This also permits tuning of the option per virtual network stack, as
well as separately per inet, inet6.

The kernel option is left for a transition period, marked deprecated,
and will be removed soon.

Initially requested by:	phk (1 year 1 day ago)
MFC after:		4 weeks
2009-05-23 16:42:38 +00:00
Bjoern A. Zeeb
f81a8a320c If including vnet.h one has to include opt_route.h as well. This is
because struct vnet_net holds the rt_tables[][] for MRT and array size
is compile time dependent.  If you had ROUTETABLES set to >1 after
r192011 V_loif was pointing into nonsense leading to strange results
or even panics for some people.

Reviewed by:	mz
2009-05-22 23:03:15 +00:00
Robert Watson
62e1ba833c Consolidate and clean up the first section of ip_output.c in light of the
last year or two's work on routing:

- Combine iproute initialization and flowtable lookup blocks, eliminating
  unnecessary tests for known-zero'd iproute fields.

- Add a comment indicating (a) why the route entry returned by the
  flowtable is considered stable and (b) that the flowtable lookup must
  occur after the setup of the mbuf flow ID.

- Assert the inpcb lock before any use of inpcb fields.

Reviewed by:	kmacy
2009-05-21 09:45:47 +00:00
Qing Li
c9d763bf41 When an interface address is removed and the last prefix
route is also being deleted, the link-layer address table
(arp or nd6) will flush those L2 llinfo entries that match
the removed prefix.

Reviewed by:	kmacy
2009-05-20 21:07:15 +00:00
Bjoern A. Zeeb
75ac4f3d32 Revert the logical change of r192341.
net.inet.ip.fw.one_pass is a classic ip_input.c variable and is used in
the pfil and bridge code as well. As ipfw is loadable we need to always
provide it.  That is the reason why it lives in struct vnet_inet and
not in struct vnet_ipfw.
2009-05-18 22:34:44 +00:00
John Baldwin
10f5c8be92 - Fix typo in description of 'net.inet.ip.fw.autoinc_step'.
- Use 'vnet_ipfw' instead of 'vnet_inet' for 'net.inet.ip.fw.one_pass'.
2009-05-18 21:46:46 +00:00
Bjoern A. Zeeb
1600c117d8 Unbreak options VIMAGE builds, in a followup to r192011 which did not
introduce INIT_VNET_NET() initializers necessary for accessing V_loif.

Submitted by:	zec
Reviewed by:	julian
2009-05-17 20:53:10 +00:00
Robert Watson
6d888973c8 Staticize two functions not used outside of in_pcb.c: in_pcbremlists() and
db_print_inpcb().

MFC after:	1 month
2009-05-14 20:59:36 +00:00
Qing Li
92fac99477 Ignore the INADDR_ANY address inserted/deleted by DHCP when installing a loopback route
to the interface address.
2009-05-14 05:27:09 +00:00
Qing Li
ebc90701ac This patch adds a host route to an interface address (that is assigned
to a non loopback/ppp link types) through the loopback interface. Prior
to the new L2/L3 rewrite, this host route is implicitly added by the L2
code during RTM_RESOLVE of that interface address. This host route is
deleted when that interface is removed.

Reviewed by:	kmacy
2009-05-12 07:41:20 +00:00
Warner Losh
573a04c930 Remove bogus comment. 2009-05-09 18:50:01 +00:00
John Baldwin
5f17ebf94d Convert IPFW_DEFAULT_TO_ACCEPT into a loader tunable
'net.inet.ip.fw.default_to_accept'.  The current value can also be queried
via a read-only sysctl of the same name.

Requested by:	plosher
MFC after:	1 week
2009-05-09 05:07:36 +00:00
Marko Zec
2114e063f0 A NOP change: style / whitespace cleanup of the noise that slipped
into r191816.

Spotted by:	bz
Approved by:	julian (mentor) (an earlier version of the diff)
2009-05-08 14:34:25 +00:00
Marko Zec
ddd50c3439 Remove a bogus check that unintentionally slipped in r191816.
This change has no functional impact on nooptions VIMAGE builds.
Submitted by:	bz
2009-05-08 14:28:06 +00:00
Randall Stewart
096ed42dad repository sync to multi-OS repo ... spaceing change 2009-05-07 16:43:49 +00:00
Randall Stewart
892f1c7141 ABI expansions to hopefully future-proof our MIB/netstat code for 8.0 2009-05-07 16:42:45 +00:00
Marko Zec
94e9f5a1c2 Remove unnecessary CURVNET_SET() calls where curvnet context is
(i.e. seems to be) already set.

This should reduce console noise due to curvnet recursion reports.

This change has no impact on nooptions VIMAGE builds.
Approved by:	julian (mentor)
2009-05-06 13:30:46 +00:00
Marko Zec
743da3bcdb Unbreak options VIMAGE kernel builds.
Approved by:	julian (mentor)
2009-05-06 08:49:39 +00:00
Marko Zec
21ca7b57bd Change the curvnet variable from a global const struct vnet *,
previously always pointing to the default vnet context, to a
dynamically changing thread-local one.  The currvnet context
should be set on entry to networking code via CURVNET_SET() macros,
and reverted to previous state via CURVNET_RESTORE().  Recursions
on curvnet are permitted, though strongly discuouraged.

This change should have no functional impact on nooptions VIMAGE
kernel builds, where CURVNET_* macros expand to whitespace.

The curthread->td_vnet (aka curvnet) variable's purpose is to be an
indicator of the vnet context in which the current network-related
operation takes place, in case we cannot deduce the current vnet
context from any other source, such as by looking at mbuf's
m->m_pkthdr.rcvif->if_vnet, sockets's so->so_vnet etc.  Moreover, so
far curvnet has turned out to be an invaluable consistency checking
aid: it helps to catch cases when sockets, ifnets or any other
vnet-aware structures may have leaked from one vnet to another.

The exact placement of the CURVNET_SET() / CURVNET_RESTORE() macros
was a result of an empirical iterative process, whith an aim to
reduce recursions on CURVNET_SET() to a minimum, while still reducing
the scope of CURVNET_SET() to networking only operations - the
alternative would be calling CURVNET_SET() on each system call entry.
In general, curvnet has to be set in three typicall cases: when
processing socket-related requests from userspace or from within the
kernel; when processing inbound traffic flowing from device drivers
to upper layers of the networking stack, and when executing
timer-driven networking functions.

This change also introduces a DDB subcommand to show the list of all
vnet instances.

Approved by:	julian (mentor)
2009-05-05 10:56:12 +00:00
Marko Zec
5f416f8e84 Make indentation more uniform accross vnet container structs.
This is a purely cosmetic / NOP change.

Reviewed by:	bz
Approved by:	julian (mentor)
Verified by:	svn diff -x -w producing no output
2009-05-02 08:16:26 +00:00
Marko Zec
d7fcc52895 Unbreak options VIMAGE + nooptions INVARIANTS kernel builds.
Submitted by:	julian
Approved by:	julian (mentor)
2009-05-02 05:02:28 +00:00
Marko Zec
f6dfe47a14 Permit buiding kernels with options VIMAGE, restricted to only a single
active network stack instance.  Turning on options VIMAGE at compile
time yields the following changes relative to default kernel build:

1) V_ accessor macros for virtualized variables resolve to structure
fields via base pointers, instead of being resolved as fields in global
structs or plain global variables.  As an example, V_ifnet becomes:

    options VIMAGE:          ((struct vnet_net *) vnet_net)->_ifnet
    default build:           vnet_net_0._ifnet
    options VIMAGE_GLOBALS:  ifnet

2) INIT_VNET_* macros will declare and set up base pointers to be used
by V_ accessor macros, instead of resolving to whitespace:

    INIT_VNET_NET(ifp->if_vnet); becomes

    struct vnet_net *vnet_net = (ifp->if_vnet)->mod_data[VNET_MOD_NET];

3) Memory for vnet modules registered via vnet_mod_register() is now
allocated at run time in sys/kern/kern_vimage.c, instead of per vnet
module structs being declared as globals.  If required, vnet modules
can now request the framework to provide them with allocated bzeroed
memory by filling in the vmi_size field in their vmi_modinfo structures.

4) structs socket, ifnet, inpcbinfo, tcpcb and syncache_head are
extended to hold a pointer to the parent vnet.  options VIMAGE builds
will fill in those fields as required.

5) curvnet is introduced as a new global variable in options VIMAGE
builds, always pointing to the default and only struct vnet.

6) struct sysctl_oid has been extended with additional two fields to
store major and minor virtualization module identifiers, oid_v_subs and
oid_v_mod.  SYSCTL_V_* family of macros will fill in those fields
accordingly, and store the offset in the appropriate vnet container
struct in oid_arg1.
In sysctl handlers dealing with virtualized sysctls, the
SYSCTL_RESOLVE_V_ARG1() macro will compute the address of the target
variable and make it available in arg1 variable for further processing.

Unused fields in structs vnet_inet, vnet_inet6 and vnet_ipfw have
been deleted.

Reviewed by:	bz, rwatson
Approved by:	julian (mentor)
2009-04-30 13:36:26 +00:00
Bruce M Simpson
33cde13046 Bite the bullet, and make the IPv6 SSM and MLDv2 mega-commit:
import from p4 bms_netdev.  Summary of changes:

 * Connect netinet6/in6_mcast.c to build.
   The legacy KAME KPIs are mostly preserved.
 * Eliminate now dead code from ip6_output.c.
   Don't do mbuf bingo, we are not going to do RFC 2292 style
   CMSG tricks for multicast options as they are not required
   by any current IPv6 normative reference.
 * Refactor transports (UDP, raw_ip6) to do own mcast filtering.
   SCTP, TCP unaffected by this change.
 * Add ip6_msource, in6_msource structs to in6_var.h.
 * Hookup mld_ifinfo state to in6_ifextra, allocate from
   domifattach path.
 * Eliminate IN6_LOOKUP_MULTI(), it is no longer referenced.
   Kernel consumers which need this should use in6m_lookup().
 * Refactor IPv6 socket group memberships to use a vector (like IPv4).
 * Update ifmcstat(8) for IPv6 SSM.
 * Add witness lock order for IN6_MULTI_LOCK.
 * Move IN6_MULTI_LOCK out of lower ip6_output()/ip6_input() paths.
 * Introduce IP6STAT_ADD/SUB/INC/DEC as per rwatson's IPv4 cleanup.
 * Update carp(4) for new IPv6 SSM KPIs.
 * Virtualize ip6_mrouter socket.
   Changes mostly localized to IPv6 MROUTING.
 * Don't do a local group lookup in MROUTING.
 * Kill unused KAME prototypes in6_purgemkludge(), in6_restoremkludge().
 * Preserve KAME DAD timer jitter behaviour in MLDv1 compatibility mode.
 * Bump __FreeBSD_version to 800084.
 * Update UPDATING.

NOTE WELL:
 * This code hasn't been tested against real MLDv2 queriers
   (yet), although the on-wire protocol has been verified in Wireshark.
 * There are a few unresolved issues in the socket layer APIs to
   do with scope ID propagation.
 * There is a LOR present in ip6_output()'s use of
   in6_setscope() which needs to be resolved. See comments in mld6.c.
   This is believed to be benign and can't be avoided for the moment
   without re-introducing an indirect netisr.

This work was mostly derived from the IGMPv3 implementation, and
has been sponsored by a third party.
2009-04-29 19:19:13 +00:00
Bruce M Simpson
9efc1a1bbf Add MLDv2 prototypes and defines. 2009-04-29 10:20:17 +00:00
Bruce M Simpson
5cf93e5d2c Use KTR_INET for MROUTING CTRs. 2009-04-29 10:17:08 +00:00
Bruce M Simpson
c566b47669 Cut over to KTR_INET for CTR.
For clarity, put pointer incremement/size decrement on own line
when copying out in-mode source filters to userland.
2009-04-29 10:14:16 +00:00