of tunclose() rather than the end, and tunopen() grabbed that unit
before tunclose() finished (one process is allocating it while another
is freeing it!).
It may be worth hanging some sort of rw mutex around all specinfo
calls where d_close and the detach handler get a write lock and all
other functions get a read lock. This would guarantee certain levels
of ``atomicity'' (is that a word?) that people may expect (I believe
Solaris does something like this).
requirements(RFC1573, interface MIB). This change for 4.4BSD was
first introduced in if_ethersubr.c:1.17->1.18.
BTW, iflastchange on all of IFs are inconsistent. e.g.
ether, tun: update
fddi, tokenring, ppp: not update
I'll make patch later.
Obtained from: KAME
MFC after: 2 weeks
This work was based on kame-20010528-freebsd43-snap.tgz and some
critical problem after the snap was out were fixed.
There are many many changes since last KAME merge.
TODO:
- The definitions of SADB_* in sys/net/pfkeyv2.h are still different
from RFC2407/IANA assignment because of binary compatibility
issue. It should be fixed under 5-CURRENT.
- ip6po_m member of struct ip6_pktopts is no longer used. But, it
is still there because of binary compatibility issue. It should
be removed under 5-CURRENT.
Reviewed by: itojun
Obtained from: KAME
MFC after: 3 weeks
around, use a common function for looking up and extracting the tunables
from the kernel environment. This saves duplicating the same function
over and over again. This way typically has an overhead of 8 bytes + the
path string, versus about 26 bytes + the path string.
route in ifa_ifwithroute(), as the last resort, look up the route to
the gateway, not destination (to derive the interface from).
PR: kern/27852
Submitted by: Iasen Kostoff <tbyte@tbyte.org>
MFC after: 2 weeks
if_up() must be called at splnet or higher.
Second, set the IFF_RUNNING flag on an interface after its
resources (i.e. tunnel source and destination addresses)
have been set. Note that we don't set IFF_UP because it is
if_up()'s job to do that.
PR: kern/27851
Submitted by: Horacio J. PeÓa <horape@compendium.com.ar>
Only tun0 -> tun32767 may now be opened as struct ifnet's if_unit
is a short.
It's now possible to open /dev/tun and get a handle back for an available
tun device (use devname to find out what you got).
The implementation uses rman by popular demand (and against my judgement)
to track opened devices and uses the new dev_depends() to ensure that
all make_dev()d devices go away before the module is unloaded.
Reviewed by: phk
despite the fact that most people want to set exactly the same settings
regardless of which card they have. It has been repeatidly suggested
that this configuration should be done via ifconfig. This patch
implements the required functionality in ifconfig and add support to the
wi and an drivers. It also provides partial, untested support for the
awi driver.
PR: 25577
Submitted by: Brooks Davis <brooks@one-eyed-alien.net>
- Allocate zeroed memory in ether_resolvemulti() to prevent equal() from
comparing garbage and determining that two otherwise-equal sockaddr_dls
are different.
- Fill in all required fields of the sockaddr_dl
- Actually copy the multicast address into the sockaddr_dl when calling
if_addmulti()
- Don't claim that we don't have a way to resolve layer 3 addresses into
layer 2 addresses; use the ethernet way.
other "system" header files.
Also help the deprecation of lockmgr.h by making it a sub-include of
sys/lock.h and removing sys/lockmgr.h form kernel .c files.
Sort sys/*.h includes where possible in affected files.
OK'ed by: bde (with reservations)
peer out from sppp_lcp_open() to sppp_lcp_up(). For one, this makes
things look more symmetrical to sppp_lcp_close(), and somehow it also
just occurred to me that an Up event following the open caused the
value of the authentication option to be clobbered.
* Set the CSRG SCCS ID to the revision this file is actually based on
(the file itself has been updated to Lite2 in rev. 1.4).
* Fix some typos in comments.
* Add a comment to the trailing #endif according to style(9)
failures in MOD_LOAD.
Dodge duplicate make_dev() calls by (ab)using dev->si_drv2 to
remember if we created the device node via a dev_clone callback
before the d_open call.
Without this, ifpromisc() always fails (after setting the IFF_PROMISC
bit in ifp->if_flags) and bpf never bothers to turn promiscuous mode off.
PR: 20188
* Initialize the "struct sockaddr_dl sdl" correctly in vlan_setmulti().
PR: kern/22181
* The driver used to call malloc(..., M_NOWAIT), but to not check the
return value. Change malloc(..., M_NOWAIT) to malloc(..., M_WAITOK)
because the corresponding part of code is called from the upper
half of the kernel only.
PR: kern/22181
* Make sure a parent interface is up and running before invoking
its if_start() routine in order to avoid system panic.
PR: kern/22179 kern/24741 i386/25478
* Do not copy all the flags from a parent mindlessly.
PR: kern/22179
* Do not call if_down() on a parent interface if it's already down.
Call if_down() at splimp because if_down() needs that.
PR: kern/22179
Reviewed by: wollman
Fix a serious bug in sppp where anyone could obtain a successful PAP
authentication by supplying a null password. I've only stumpled across
the PR while browsing for all sppp-related PRs.
Should we also file a security advisory for this?
PR: 21592
Submitted by: <dli@3bc.de> Dirk Liebke
When we get an Open event in stopped state, experience shows that this
is usually means we've somehow missed a previous Down event. This has
occasionally bitten people for the IPCP layer with ISDN, apparently a
previously aborted IPCP negotiation must have caused this. As a
bandaid, we quickly pretent a Down event by advancing to starting
state; this effectively implements the `restart' option mentioned in
RFC 1663.
While i'm not yet fully convinced this is the best thing to do (and is
fully compliant with RFC 1661), i've seen a number of reports here on
the German mailing lists where people have been bitten by the previous
behaviour which usually causes quickly looping ISDN reconnects (thus
loss of money...), and where just this patch fixes the problem.
For this, i'd even like to see it MFC'd if possible.
Submitted by: Helmut Kreft <kreft@zeus.ai-lab.fh-furtwangen.de>
- Use explicit sizes for header structure fields.
- Use __attribute__ ((__packed__)) for header structures.
- Define struct iso88025_rif; for future use.
- Prototype upcoming iso88025_ifdetach()
- Get rid of __P() constructs in prototypes.
A route generated from an RTF_CLONING route had the RTF_WASCLONED flag
set but did not have a reference to the parent route, as documented in
the rtentry(9) manpage. This prevented such routes from being deleted
when their parent route is deleted.
Now, for example, if you delete an IP address from a network interface,
all ARP entries that were cloned from this interface route are flushed.
This also has an impact on netstat(1) output. Previously, dynamically
created ARP cache entries (RTF_STATIC flag is unset) were displayed as
part of the routing table display (-r). Now, they are only printed if
the -a option is given.
netinet/in.c, netinet/in_rmx.c:
When address is removed from an interface, also delete all routes that
point to this interface and address. Previously, for example, if you
changed the address on an interface, outgoing IP datagrams might still
use the old address. The only solution was to delete and re-add some
routes. (The problem is easily observed with the route(8) command.)
Note, that if the socket was already bound to the local address before
this address is removed, new datagrams generated from this socket will
still be sent from the old address.
PR: kern/20785, kern/21914
Reviewed by: wollman (the idea)
Since we know there's always an upper bound we force that bound,
otherwise users can cause a panic via malloc getting hit with a
odd (huge or negative) amount of memory to allocate.
Tested by: kris
Pointed out by: Andrey Valyaev <dron@infosec.ru>
credential structure, ucred (cr->cr_prison).
o Allow jail inheritence to be a function of credential inheritence.
o Abstract prison structure reference counting behind pr_hold() and
pr_free(), invoked by the similarly named credential reference
management functions, removing this code from per-ABI fork/exit code.
o Modify various jail() functions to use struct ucred arguments instead
of struct proc arguments.
o Introduce jailed() function to determine if a credential is jailed,
rather than directly checking pointers all over the place.
o Convert PRISON_CHECK() macro to prison_check() function.
o Move jail() function prototypes to jail.h.
o Emulate the P_JAILED flag in fill_kinfo_proc() and no longer set the
flag in the process flags field itself.
o Eliminate that "const" qualifier from suser/p_can/etc to reflect
mutex use.
Notes:
o Some further cleanup of the linux/jail code is still required.
o It's now possible to consider resolving some of the process vs
credential based permission checking confusion in the socket code.
o Mutex protection of struct prison is still not present, and is
required to protect the reference count plus some fields in the
structure.
Reviewed by: freebsd-arch
Obtained from: TrustedBSD Project
mtx_enter(lock, type) becomes:
mtx_lock(lock) for sleep locks (MTX_DEF-initialized locks)
mtx_lock_spin(lock) for spin locks (MTX_SPIN-initialized)
similarily, for releasing a lock, we now have:
mtx_unlock(lock) for MTX_DEF and mtx_unlock_spin(lock) for MTX_SPIN.
We change the caller interface for the two different types of locks
because the semantics are entirely different for each case, and this
makes it explicitly clear and, at the same time, it rids us of the
extra `type' argument.
The enter->lock and exit->unlock change has been made with the idea
that we're "locking data" and not "entering locked code" in mind.
Further, remove all additional "flags" previously passed to the
lock acquire/release routines with the exception of two:
MTX_QUIET and MTX_NOSWITCH
The functionality of these flags is preserved and they can be passed
to the lock/unlock routines by calling the corresponding wrappers:
mtx_{lock, unlock}_flags(lock, flag(s)) and
mtx_{lock, unlock}_spin_flags(lock, flag(s)) for MTX_DEF and MTX_SPIN
locks, respectively.
Re-inline some lock acq/rel code; in the sleep lock case, we only
inline the _obtain_lock()s in order to ensure that the inlined code
fits into a cache line. In the spin lock case, we inline recursion and
actually only perform a function call if we need to spin. This change
has been made with the idea that we generally tend to avoid spin locks
and that also the spin locks that we do have and are heavily used
(i.e. sched_lock) do recurse, and therefore in an effort to reduce
function call overhead for some architectures (such as alpha), we
inline recursion for this case.
Create a new malloc type for the witness code and retire from using
the M_DEV type. The new type is called M_WITNESS and is only declared
if WITNESS is enabled.
Begin cleaning up some machdep/mutex.h code - specifically updated the
"optimized" inlined code in alpha/mutex.h and wrote MTX_LOCK_SPIN
and MTX_UNLOCK_SPIN asm macros for the i386/mutex.h as we presently
need those.
Finally, caught up to the interface changes in all sys code.
Contributors: jake, jhb, jasone (in no particular order)
different hardware address, we should drop it (this should only
happen in promiscuous mode). Relocate the code for this check
from before ng_ether(4) processing to after ng_ether(4) processing.
Also fix a compiler warning.
PR: kern/24465
There are two 3rd party code chunks using this still - the IPv6 stuff and
i4b. Give them a private copy as an alternative to changing them too much.
XXX sys/kernel.h still has a #include <sys/module.h> in it. I will be
taking this out shortly - this affects a number of drivers.
in tunopen())
o Change the default device permissions to 0600 root:wheel
(were uucp:dialer)
o Only let root (suser()) change the MTU
This makes it possible for an administrator to open up the
permissions on /dev/tun*, letting non-root programs service
a tun interface. Co-operation is still required with a
priviledged program that will configure the interface side
of things.
valid) if BPF is missing.
The netgraph_bpf node forced bpf to be present, reflect that in the
options.
Stop doing a 'count bpf' - we provide stubs.
Since a handful of drivers still refer to "bpf.h", provide a more accurate
indication that the API is present always. (eg: netinet6)
would *want* to is a different story, but it used to be able to be done
statically. Get rid of #include "loop.h" and struct ifnet loif[NLOOP];
This could be used as an example of how to do this in other drivers,
for example: ccd.
+ configuration: make sure that the NUL at the end of the config
string is properly detected and handled, and the stats passed
up via sysctl properly reflect which interfaces do bridging.
(The whole config support might make good use of some cleanup
in the future).
+ fixed some bugs related to the corruption of multicast and
broadcast packets: make sure that for those packets the entire
IP + ethernet header is in the mbuf, not in a cluster, so
that writes performed in that area by the upper layers do
not affect us.
+ performance: when calling m_pullup, make room for the ethernet header
as well, we are going to add it in right after. Also, change an m_dup
back to m_copypacket. The former is not necessary anymore now, and
it did not help, anyways.
I will do a fast MFC because 95% of this patch is fixing bad bugs
and i doubt anyone would test the fix in CURRENT. Plus the last
two items mostly bring back some code which was already there in 4.0
times.
inline functions non-inlined. Hide parts of the mutex implementation that
should not be exposed.
Make sure that WITNESS code is not executed during boot until the mutexes
are fully initialized by SI_SUB_MUTEX (the original motivation for this
commit).
Submitted by: peter
This is because calls with M_WAIT (now M_TRYWAIT) may not wait
forever when nothing is available for allocation, and may end up
returning NULL. Hopefully we now communicate more of the right thing
to developers and make it very clear that it's necessary to check whether
calls with M_(TRY)WAIT also resulted in a failed allocation.
M_TRYWAIT basically means "try harder, block if necessary, but don't
necessarily wait forever." The time spent blocking is tunable with
the kern.ipc.mbuf_wait sysctl.
M_WAIT is now deprecated but still defined for the next little while.
* Fix a typo in a comment in mbuf.h
* Fix some code that was actually passing the mbuf subsystem's M_WAIT to
malloc(). Made it pass M_WAITOK instead. If we were ever to redefine the
value of the M_WAIT flag, this could have became a big problem.
to negotiate from scratch. Make leased lines survive being put into
loopback mode. Bits and pieces and ideas taken from PRs 11238 and 21771.
Make it a module so that it can be kldloaded. Whitespace cleanup. (Can be
ignored with "cvs diff -b".)
PR: 11238 and 21771 (bits and pieces)
and had no data available returned 0. Now it returns -1 with errno
set to EWOULDBLOCK (== EAGAIN) as it should. This fix makes the bpf
device usable in threaded programs.
Reviewed by: bde
a tunstart function, which is called when a packet is sucessfully
placed on the queue. This allows us to properly do output byte accounting
within the handoff routine.
spending, which was unused now that all software interrupts have
their own thread. Make the legacy schednetisr use an atomic op
for setting bits in the netisr mask.
Reviewed by: jhb
before adding/removing packets from the queue. Also, the if_obytes and
if_omcasts fields should only be manipulated under protection of the mutex.
IF_ENQUEUE, IF_PREPEND, and IF_DEQUEUE perform all necessary locking on
the queue. An IF_LOCK macro is provided, as well as the old (mutex-less)
versions of the macros in the form _IF_ENQUEUE, _IF_QFULL, for code which
needs them, but their use is discouraged.
Two new macros are introduced: IF_DRAIN() to drain a queue, and IF_HANDOFF,
which takes care of locking/enqueue, and also statistics updating/start
if necessary.
* Some dummynet code incorrectly handled a malloc()-allocated pseudo-mbuf
header structure, called "pkt," and could consequently pollute the mbuf
free list if it was ever passed to m_freem(). The fix involved passing not
pkt, but essentially pkt->m_next (which is a real mbuf) to the mbuf
utility routines.
* Also, for dummynet, in bdg_forward(), made the code copy the ethernet header
back into the mbuf (prepended) because the dummynet code that follows expects
it to be there but it is, unfortunately for dummynet, passed to bdg_forward
as a seperate argument.
PRs: kern/19551 ; misc/21534 ; kern/23010
Submitted by: Thomas Moestl <tmoestl@gmx.net>
Reviewed by: bmilekic
Approved by: luigi
<sys/proc.h> to <sys/systm.h>.
Correctly document the #includes needed in the manpage.
Add one now needed #include of <sys/systm.h>.
Remove the consequent 48 unused #includes of <sys/proc.h>.
seems to be that the nodes are bzero'd beforehand, but the submitter
found that this was not always the case, and in any event defensive
programming here costs epsilon squared.
PR: 22244
Submitted by: Dave Gillam <daveg@chiaro.com>
because it only takes a struct tag which makes it impossible to
use unions, typedefs etc.
Define __offsetof() in <machine/ansi.h>
Define offsetof() in terms of __offsetof() in <stddef.h> and <sys/types.h>
Remove myriad of local offsetof() definitions.
Remove includes of <stddef.h> in kernel code.
NB: Kernelcode should *never* include from /usr/include !
Make <sys/queue.h> include <machine/ansi.h> to avoid polluting the API.
Deprecate <struct.h> with a warning. The warning turns into an error on
01-12-2000 and the file gets removed entirely on 01-01-2001.
Paritials reviews by: various.
Significant brucifications by: bde
type of software interrupt. Roughly, what used to be a bit in spending
now maps to a swi thread. Each thread can have multiple handlers, just
like a hardware interrupt thread.
- Instead of using a bitmask of pending interrupts, we schedule the specific
software interrupt thread to run, so spending, NSWI, and the shandlers
array are no longer needed. We can now have an arbitrary number of
software interrupt threads. When you register a software interrupt
thread via sinthand_add(), you get back a struct intrhand that you pass
to sched_swi() when you wish to schedule your swi thread to run.
- Convert the name of 'struct intrec' to 'struct intrhand' as it is a bit
more intuitive. Also, prefix all the members of struct intrhand with
'ih_'.
- Make swi_net() a MI function since there is now no point in it being
MD.
Submitted by: cp
statistics on a per network address basis.
Teach the IPv4 and IPv6 input/output routines to log packets/bytes
against the network address connected to the flow.
Teach netstat to display the per-address stats for IP protocols
when 'netstat -i' is evoked, instead of displaying the per-interface
stats.
Define the NETISR just like all the other NETISRs.
unifdef -Usun -D__FreeBSD__ we will probably never support sun4c
and if we do we can't use the solaris code anyway and I doubt
anybody will be running Fore ATM cards in then in the first place.
sifficient. But somewhere (I believe in the UDP stuff), someone is
overwriting an mbuf without calling m_pullup() first. This results in
broad- and multi-cast traffic that is passed through the bridge getting
corrupted.
This should be backed out when there is some assurance that the upper
layers (and I suppose all of the device drivers) are fixed.
Suggested by: archie
pointer, when bridging and bridge_ipfw are enabled, and when bdg_forward()
happens to free the packet and make our pointer NULL. There may be
more similar problems like this one with calls to bdg_forward().
PR: Related to kern/19551
Reviewed by: jlemon
which hides the 'hole' in the minor bits.
Introduce unit2minor() to do the reverse operation.
Fix some some make_dev() calls which didn't use UID_* or GID_* macros.
Kill the v_hashchain alias macro, it hides the real relationship.
Introduce experimental SI_CHEAPCLONE flag set it on cloned bpfs.
include:
* Mutual exclusion is used instead of spl*(). See mutex(9). (Note: The
alpha port is still in transition and currently uses both.)
* Per-CPU idle processes.
* Interrupts are run in their own separate kernel threads and can be
preempted (i386 only).
Partially contributed by: BSDi (BSD/OS)
Submissions by (at least): cp, dfr, dillon, grog, jake, jhb, sheldonh
unsupported address family is used on localhost interface.
looutput: af=0 unexpected
Speculation as to the reasons for my seeing this error are welcome, of
course. :-)
cloning infrastructure standard in kern_conf. Modules are now
the same with or without devfs support.
If you need to detect if devfs is present, in modules or elsewhere,
check the integer variable "devfs_present".
This happily removes an ugly hack from kern/vfs_conf.c.
This forces a rename of the eventhandler and the standard clone
helper function.
Include <sys/eventhandler.h> in <sys/conf.h>: it's a helper #include
like <sys/queue.h>
Remove all #includes of opt_devfs.h they no longer matter.
Remove old DEVFS support fields from dev_t.
Make uid, gid & mode members of dev_t and set them in make_dev().
Use correct uid, gid & mode in make_dev in disk minilayer.
Add support for registering alias names for a dev_t using the
new function make_dev_alias(). These will show up as symlinks
in DEVFS.
Use makedev() rather than make_dev() for MFSs magic devices to prevent
DEVFS from noticing this abuse.
Add a field for DEVFS inode number in dev_t.
Add new DEVFS in fs/devfs.
Add devfs cloning to:
disk minilayer (ie: ad(4), sd(4), cd(4) etc etc)
md(4), tun(4), bpf(4), fd(4)
If DEVFS add -d flag to /sbin/inits args to make it mount devfs.
Add commented out DEVFS to GENERIC
it to a mbuf. This patch makes it attach it to mbuf. This patch
is in preperation for Bosko Milekic's mbuf external reference
counting patches.
PR: 19866 (first stage)
Submitted by: Ian Dowse <iedowse@maths.tcd.ie>
Reviewed by: alfred
length of NWID. This breaks binary compatibility but only the awi driver
refers this ioctl; no userland tools refers it.
Add WEP stuff.
Obtained from: NetBSD current
gif/faith/stf moved to 0xfN entries, since their previous location
is allocated to some other interfaces.
Also add the IFT_PVC, which is the ATM PVC subinterface from ALTQ.
This also syncs us up a bit to NetBSD again.
This change requires a total recompilation of all kmem users, as
itojun told me.
Next in line is synching to the IANI SMI list.
Approved by: itojun
Add spl/splx to various sensitive spots
Change semantics of the vmnet version of the device to keep VMware happy
(don't junk state when the device is closed)
Submitted by: vsilyaev@mindspring.com
delete the cloned route that is associated with the connection.
This does not exhaust the routing table memory when the system
is under a SYN flood attack. The route entry is not deleted if there
is any prior information cached in it.
Reviewed by: Peter Wemm,asmodai
configurations include loadable interfaces. After loading new
interface drivers, perform a 'sysctl -w net.link.ether.bridge_refresh=1'
and the bridge code will reinitialize itself.
Submitted by: <vsilyaev@mindspring.com>
The tap driver is used to present a virtual Ethernet interface to the
system. Packets presented by the network stack to the interface are
made available to a character device in /dev. With tap and the bridge
code, you can make remote bridge configurations where both sides of
the bridge are separated by userland daemons.
This driver also has a special naming hack to allow it to serve a similar
purpose to the vmware port.
Submitted by: myevmenkin@att.com, vsilyaev@mindspring.com
