Commit Graph

55 Commits

Author SHA1 Message Date
Brooks Davis
fc74a9f93a Stop embedding struct ifnet at the top of driver softcs. Instead the
struct ifnet or the layer 2 common structure it was embedded in have
been replaced with a struct ifnet pointer to be filled by a call to the
new function, if_alloc(). The layer 2 common structure is also allocated
via if_alloc() based on the interface type. It is hung off the new
struct ifnet member, if_l2com.

This change removes the size of these structures from the kernel ABI and
will allow us to better manage them as interfaces come and go.

Other changes of note:
 - Struct arpcom is no longer referenced in normal interface code.
   Instead the Ethernet address is accessed via the IFP2ENADDR() macro.
   To enforce this ac_enaddr has been renamed to _ac_enaddr.
 - The second argument to ether_ifattach is now always the mac address
   from driver private storage rather than sometimes being ac_enaddr.

Reviewed by:	sobomax, sam
2005-06-10 16:49:24 +00:00
Peter Edwards
45778b37b2 Separate out address-detaching part of if_detach into if_purgeaddrs,
so if_tap doesn't need to rely on locally-rolled code to do same.

The observable symptom of if_tap's bzero'ing the address details
was a crash in "ifconfig tap0" after an if_tap device was closed.

Reported By: Matti Saarinen (mjsaarin at cc dot helsinki dot fi)
2005-05-25 13:52:03 +00:00
Maksim Yevmenkin
75ae257016 Change m_uiotombuf so it will accept offset at which data should be copied
to the mbuf. Offset cannot exceed MHLEN bytes. This is currently used to
fix Ethernet header alignment problem on alpha and sparc64. Also change all
users of m_uiotombuf to pass proper offset.

Reviewed by:	jmg, sam
Tested by:	Sten Spans "sten AT blinkenlights DOT nl"
MFC after:	1 week
2005-05-04 18:55:03 +00:00
Matthew N. Dodd
b137ea624b Provide a sysctl (net.link.tap.user_open) to allow unpriviliged
acces to tap(4) device nodes based on file system permission.

Duplicate the 'debug.if_tap_debug' sysctl under the
'net.link.tap' hierarchy.
2005-04-13 00:30:19 +00:00
Poul-Henning Kamp
f4f6abcb4e Explicitly hold a reference to the cdev we have just cloned. This
closes the race where the cdev was reclaimed before it ever made it
back to devfs lookup.
2005-03-31 12:19:44 +00:00
Warner Losh
c398230b64 /* -> /*- for license, minor formatting changes 2005-01-07 01:45:51 +00:00
Poul-Henning Kamp
9eaed5e66e Don't include filedesc.h
Include fcntl.h
Include selinfo.h (don't rely on vnode.h to do so)
Check O_NONBLOCK instead of IO_NDELAY
Don't include vnode.h
2004-12-22 17:38:43 +00:00
Gleb Smirnoff
411f23b06e Utilize m_uiotombuf() in device write method, instead of home-grown
implementation. This also gives a performance improvement, because
m_uiotombuf() utilizes clusters.

Approved by:	julian (mentor)
MFC after:	1 month
2004-10-31 17:39:46 +00:00
Robert Watson
6874bcf242 Destroy global tapmtx when the if_tap module is unloaded.
RELENG_5 candidated.
2004-09-17 03:55:50 +00:00
Maksim Yevmenkin
285b72aa78 Set IFF_RUNNING flag on the interface as soon as the control device is opened. 2004-08-11 00:12:27 +00:00
Poul-Henning Kamp
f3732fd15b Second half of the dev_t cleanup.
The big lines are:
	NODEV -> NULL
	NOUDEV -> NODEV
	udev_t -> dev_t
	udev2dev() -> findcdev()

Various minor adjustments including handling of userland access to kernel
space struct cdev etc.
2004-06-17 17:16:53 +00:00
Poul-Henning Kamp
89c9c53da0 Do the dreaded s/dev_t/struct cdev */
Bump __FreeBSD_version accordingly.
2004-06-16 09:47:26 +00:00
Poul-Henning Kamp
5dba30f15a add missing #include <sys/module.h> 2004-05-30 20:27:19 +00:00
Robert Watson
78592d56ef Correct a bug introduced with the recent clone API chang: when the clone
event handler for if_tap fails, make sure to clean up clone state to
prevent a clone memory leak.
2004-03-18 14:18:51 +00:00
Robert Watson
b4f5ef7eac sAdd a comment indicating why there continues to be a race condition in
the tap driver, even with Giant over the cdev operation vector, due to
a non-atomic test-and-set of the si_drv1 field in the dev_t.  This bug
exists with Giant under high memory pressure, as malloc() may sleep
in tapcreate(), but is less likely to occur.  The resolution will
probably be to cover si_drv1 using the global tapmtx since no softc is
available, but I need to think about this problem more generally
across a range of drivers using si_drv1 in combination with SI_CHEAPCLONE
to defer expensive allocation to open().

Correct what appears to be a bug in the original if_tap implementation,
in which tapopen() will panic if a tap device instance is opened more
than once due to an incorrect assertion -- only triggered if INVARIANTS
is compiled in (i.e., when built into a kernel).  Return EBUSY instead.

Expand mtx_lock() coverage using tp->tap_mtx to include tp->ether_addr.
2004-03-18 09:55:11 +00:00
Robert Watson
7c924a5287 Add tap_mtx to tap_softc in order to protect per-softc variables
(tap_pid, tap_flags).  if_tap should now be entirely MPSAFE.

Committed from:			Bamboo house by ocean in Taiwan
Tropical paradise provided by:	Chia-liang Kao <clkao@clkao.org>
2004-03-17 01:09:59 +00:00
Robert Watson
5e71a73b7b Lock down global variables in if_tap (primarily, the tap softc list);
add tapmtx, which protects globale variables.

Notes:

- The EBUSY check in MOD_UNLOAD may be subject to a race.  Moving the
  event handler unregister inside the mutex grab may prevent that race.

- Locking of global variables safely is now possible because tapclones
  is only modified when the module is loading or unloading, thanks to
  phk's recent chang to clone_setup().

- softc locking to follow.
2004-03-15 01:52:00 +00:00
Poul-Henning Kamp
9397290e76 Add clone_setup() function rather than rely on lazy initialization.
Requested by:	rwatson
2004-03-11 12:58:55 +00:00
Poul-Henning Kamp
4f81134a23 Fix handling of tap/vmnet flag in relation to cloning and properly enforce
largest supported unit number for this device driver.

Reported by:	Kaho Toshikazu <kaho@easy.es.tuat.ac.jp>
2004-03-10 08:02:29 +00:00
Bruce Evans
63a97efcbb Don't set d_flags twice. The second setting clobbered D_NOGIANT. 2004-02-24 04:35:44 +00:00
Poul-Henning Kamp
dc08ffec87 Device megapatch 4/6:
Introduce d_version field in struct cdevsw, this must always be
initialized to D_VERSION.

Flip sense of D_NOGIANT flag to D_NEEDGIANT, this involves removing
four D_NOGIANT flags and adding 145 D_NEEDGIANT flags.
2004-02-21 21:10:55 +00:00
Poul-Henning Kamp
b0b0334878 Device megapatch 2/6:
This commit adds a couple of functions for pseudodrivers to use for
implementing cloning in a manner we will be able to lock down (shortly).

Basically what happens is that pseudo drivers get a way to ask for
"give me the dev_t with this unit number" or alternatively "give
me a dev_t with the lowest guaranteed free unit number" (there is
unfortunately a lot of non-POLA in the exact numeric value of this
number, just live with it for now)

Managing the unit number space this way removes the need to use
rman(9) to do so in the drivers this greatly simplifies the code in
the drivers because even using rman(9) they still needed to manage
their dev_t's anyway.

I have taken the if_tun, if_tap, snp and nmdm drivers through the
mill, partly because they (ab)used makedev(), but mostly because
together they represent three different problems for device-cloning:

if_tun and snp is the plain case: just give me a device.

if_tap has two kinds of devices, with a flag for device type.

nmdm has paired devices (ala pty) can you can clone either of them.
2004-02-21 20:29:52 +00:00
Seigo Tanimura
512824f8f7 - Implement selwakeuppri() which allows raising the priority of a
thread being waken up.  The thread waken up can run at a priority as
  high as after tsleep().

- Replace selwakeup()s with selwakeuppri()s and pass appropriate
  priorities.

- Add cv_broadcastpri() which raises the priority of the broadcast
  threads.  Used by selwakeuppri() if collision occurs.

Not objected in:	-arch, -current
2003-11-09 09:17:26 +00:00
Brooks Davis
9bf40ede4a Replace the if_name and if_unit members of struct ifnet with new members
if_xname, if_dname, and if_dunit. if_xname is the name of the interface
and if_dname/unit are the driver name and instance.

This change paves the way for interface renaming and enhanced pseudo
device creation and configuration symantics.

Approved By:	re (in principle)
Reviewed By:	njl, imp
Tested On:	i386, amd64, sparc64
Obtained From:	NetBSD (if_xname)
2003-10-31 18:32:15 +00:00
Poul-Henning Kamp
7ac40f5f59 Gigacommit to improve device-driver source compatibility between
branches:

Initialize struct cdevsw using C99 sparse initializtion and remove
all initializations to default values.

This patch is automatically generated and has been tested by compiling
LINT with all the fields in struct cdevsw in reverse order on alpha,
sparc64 and i386.

Approved by:    re(scottl)
2003-03-03 12:15:54 +00:00
Dag-Erling Smørgrav
521f364b80 More low-hanging fruit: kill caddr_t in calls to wakeup(9) / [mt]sleep(9). 2003-03-02 16:54:40 +00:00
Dag-Erling Smørgrav
8994a245e0 Clean up whitespace, s/register //, refrain from strong urge to ANSIfy. 2003-03-02 15:56:49 +00:00
Dag-Erling Smørgrav
c952458814 uiomove-related caddr_t -> void * (just the low-hanging fruit) 2003-03-02 15:50:23 +00:00
Warner Losh
a163d034fa Back out M_* changes, per decision of the TRB.
Approved by: trb
2003-02-19 05:47:46 +00:00
Poul-Henning Kamp
6ec82c07ac NODEVFS cleanup: unifdef 2003-01-30 13:13:11 +00:00
Alfred Perlstein
44956c9863 Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.
Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.
2003-01-21 08:56:16 +00:00
Poul-Henning Kamp
7e760e148a Originally when DEVFS was added, a global variable "devfs_present"
was used to control code which were conditional on DEVFS' precense
since this avoided the need for large-scale source pollution with
#include "opt_geom.h"

Now that we approach making DEVFS standard, replace these tests
with an #ifdef to facilitate mechanical removal once DEVFS becomes
non-optional.

No functional change by this commit.
2003-01-19 11:03:07 +00:00
Sam Leffler
6fc32a2495 network interface and link layer changes:
o on input don't strip the Ethernet header from packets
o input packet handling is now done with if_input
o track changes to ether_ifattach/ether_ifdetach API
o track changes to bpf tapping
o call ether_ioctl for default handling of ioctl's
o use constants from net/ethernet.h where possible

Reviewed by:	many
Approved by:	re
2002-11-15 00:00:15 +00:00
Poul-Henning Kamp
08b29601a0 Be consistent about functions being static.
Spotted by:	FlexeLint
2002-10-16 10:45:53 +00:00
Don Lewis
91e97a8266 In an SMP environment post-Giant it is no longer safe to blindly
dereference the struct sigio pointer without any locking.  Change
fgetown() to take a reference to the pointer instead of a copy of the
pointer and call SIGIO_LOCK() before copying the pointer and
dereferencing it.

Reviewed by:	rwatson
2002-10-03 02:13:00 +00:00
Maxim Sobolev
62f7648682 Increase size of ifnet.if_flags from 16 bits (short) to 32 bits (int). To avoid
breaking application ABI use unused ifreq.ifru_flags[1] for upper 16 bits in
SIOCSIFFLAGS and SIOCGIFFLAGS ioctl's.

Reviewed by:	-hackers, -net
2002-08-18 07:05:00 +00:00
Alfred Perlstein
e649887b1e Make funsetown() take a 'struct sigio **' so that the locking can
be done internally.

Ensure that no one can fsetown() to a dying process/pgrp.  We need
to check the process for P_WEXIT to see if it's exiting.  Process
groups are already safe because there is no such thing as a pgrp
zombie, therefore the proctree lock completely protects the pgrp
from having sigio structures associated with it after it runs
funsetownlst.

Add sigio lock to witness list under proctree and allproc, but over
proc and pgrp.

Seigo Tanimura helped with this.
2002-05-06 19:31:28 +00:00
Alfred Perlstein
f132072368 Redo the sigio locking.
Turn the sigio sx into a mutex.

Sigio lock is really only needed to protect interrupts from dereferencing
the sigio pointer in an object when the sigio itself is being destroyed.

In order to do this in the most unintrusive manner change pgsigio's
sigio * argument into a **, that way we can lock internally to the
function.
2002-05-01 20:44:46 +00:00
Luigi Rizzo
d722be5487 Replace (deprecated ?) FREE() macro with direct calls to free() 2002-04-04 06:03:17 +00:00
John Baldwin
44731cab3b Change the suser() API to take advantage of td_ucred as well as do a
general cleanup of the API.  The entire API now consists of two functions
similar to the pre-KSE API.  The suser() function takes a thread pointer
as its only argument.  The td_ucred member of this thread must be valid
so the only valid thread pointers are curthread and a few kernel threads
such as thread0.  The suser_cred() function takes a pointer to a struct
ucred as its first argument and an integer flag as its second argument.
The flag is currently only used for the PRISON_ROOT flag.

Discussed on:	smp@
2002-04-01 21:31:13 +00:00
Bruce Evans
34fe62c776 Fixed some style bugs in the removal of __P(()). The main ones were
not removing tabs before "__P((", and not outdenting continuation lines
to preserve non-KNF lining up of code with parentheses.  Switch to KNF
formatting and/or rewrap the whole prototype in some cases.
2002-03-24 09:34:04 +00:00
Alfred Perlstein
929ddbbb89 Remove __P. 2002-03-19 21:54:18 +00:00
Matthew Dillon
ecde8f7c29 Get rid of the twisted MFREE() macro entirely.
Reviewed by:	dg, bmilekic
MFC after:	3 days
2002-02-05 02:00:56 +00:00
Jonathan Lemon
effa274e9e whitespace fixes. 2001-12-14 19:32:47 +00:00
John Baldwin
ed01445d8f Use the passed in thread to selrecord() instead of curthread. 2001-09-21 22:46:54 +00:00
Julian Elischer
b40ce4165d KSE Milestone 2
Note ALL MODULES MUST BE RECOMPILED
make the kernel aware that there are smaller units of scheduling than the
process. (but only allow one thread per process at this time).
This is functionally equivalent to teh previousl -current except
that there is a thread associated with each process.

Sorry john! (your next MFC will be a doosie!)

Reviewed by: peter@freebsd.org, dillon@freebsd.org

X-MFC after:    ha ha ha ha
2001-09-12 08:38:13 +00:00
Brooks Davis
dc9b30fcc2 Add cloning support for the tap(4) device similar to that in the tun(4)
device.

Submitted by:   Maksim Yevmenkin <myevmenk@digisle.net>
2001-09-05 01:06:21 +00:00
Poul-Henning Kamp
f83880518b Send the remains (such as I have located) of "block major numbers" to
the bit-bucket.
2001-03-26 12:41:29 +00:00
Brian Somers
d38cfdcb8c Pass the minor number rather than the unit number to make_dev()
from the clone handler.
2001-02-02 03:32:25 +00:00
Poul-Henning Kamp
b8627aab72 DEVFS cloning for if_tap.
Submitted by:	Maksim Yevmenkin <m_evmenkin@yahoo.com>
2001-01-24 20:59:34 +00:00