Commit Graph

125 Commits

Author SHA1 Message Date
Qing Li
6b533b5ddb Verify interface up status using its link state only
if the interface has such capability. The interface
capability flag indicates whether such capability
exists. This approach is much more backward compatible.
Physical device driver changes will be part of another
commit.

Also updated the ifconfig utility to show the LINKSTATE
capability if present.

Reviewed by:	rwatson, imp, juli
MFC after:	3 days
2010-03-16 17:59:12 +00:00
Pyun YongHyeon
9b76d9cb3d Add TSO support on VLANs. Intentionally separated IFCAP_VLAN_HWTSO
from IFCAP_VLAN_HWTAGGING. I think some hardwares may be able to
TSO over VLAN without VLAN hardware tagging.
Driver changes and userland support will follow.

Reviewed by:	thompsa
2010-02-20 22:47:20 +00:00
Xin LI
215940b3fa Revised revision 199201 (add interface description capability as inspired
by OpenBSD), based on comments from many, including rwatson, jhb, brooks
and others.

Sponsored by:	iXsystems, Inc.
MFC after:	1 month
2010-01-27 00:30:07 +00:00
John Baldwin
5428776e2c Change vlan interfaces to cope more usefully with the parent interface being
renamed.  Previously the vlan interfaces would lose their configuration as if
the parent interface had been physically removed.  Now vlan interfaces ignore
rename events.
- Add a new ifnet flag (IFF_RENAMING) that is set while an ifnet is being
  renamed.  This flag can be checked in ifnet departure/arrival event
  handlers to treat rename events differently.
- Change the ifnet departure event handler in the if_vlan(4) driver to
  ignore departure events due to a trunk interface being renamed.

Reviewed by:	brooks, rwatson
MFC after:	1 week
2009-12-29 13:35:18 +00:00
Xin LI
1a9d4dda9b Revert revision 199201 for now as it has introduced a kernel vulnerability
and requires more polishing.
2009-11-12 19:02:10 +00:00
Xin LI
41c8c6e876 Add interface description capability as inspired by OpenBSD.
MFC after:	3 months
2009-11-11 21:30:58 +00:00
Jamie Gritton
679e13901c Manage vnets via the jail system. If a jail is given the boolean
parameter "vnet" when it is created, a new vnet instance will be created
along with the jail.  Networks interfaces can be moved between prisons
with an ioctl similar to the one that moves them between vimages.
For now vnets will co-exist under both jails and vimages, but soon
struct vimage will be going away.

Reviewed by:	zec, julian
Approved by:	bz (mentor)
2009-06-15 18:59:29 +00:00
Attilio Rao
1abcdbd127 When user_frac in the polling subsystem is low it is going to busy the
CPU for too long period than necessary.  Additively, interfaces are kept
polled (in the tick) even if no more packets are available.
In order to avoid such situations a new generic mechanism can be
implemented in proactive way, keeping track of the time spent on any
packet and fragmenting the time for any tick, stopping the processing
as soon as possible.

In order to implement such mechanism, the polling handler needs to
change, returning the number of packets processed.
While the intended logic is not part of this patch, the polling KPI is
broken by this commit, adding an int return value and the new flag
IFCAP_POLLING_NOCOUNT (which will signal that the return value is
meaningless for the installed handler and checking should be skipped).

Bump __FreeBSD_version in order to signal such situation.

Reviewed by:	emaste
Sponsored by:	Sandvine Incorporated
2009-05-30 15:14:44 +00:00
Robert Watson
242a8e72eb Add a new interface flag, IFF_DYING, which is set when a device driver
calls if_free(), and remains set if the refcount is elevated.  IF_DYING
skips the bit in the if_flags bitmask previously used by IFF_NEEDSGIANT,
so that an MFC can be done without changing which bit is used, as
IFF_NEEDSGIANT is still present in 7.x.

ifnet_byindex_ref() checks for IFF_DYING and returns NULL if it is set,
preventing new references from by acquired by index, preventing
monitoring sysctls from seeing it.  Other lookup mechanisms currently
do not check IFF_DYING, but may need to in the future.

MFC after:	3 weeks
2009-04-23 09:32:30 +00:00
Robert Watson
04ac2960c4 Remove IFF_NEEDSGIANT interface flag: we no longer provide ifnet-layer
infrastructure to support non-MPSAFE network device drivers.
2009-04-18 20:39:17 +00:00
Luigi Rizzo
a1d4f19c0d remove unnecessary forward declaration 2009-02-16 15:09:37 +00:00
Jack F Vogel
22893351e5 Fix to bug kern/126850. Only dispatch event hander if the
interface had a parent (was attached).

Reviewed by: EvilSam
MFC after: 1 week
2008-08-28 22:05:19 +00:00
John Baldwin
feaed6c57e Trim some noise from some #ifdef's. This had leaked into the compat32
support for bpf(4) due to hacks in the Y! tree for a truss32 binary
(since superseded by native support for 32-bit binaries in truss itself).

MFC after:	1 week
2008-07-30 21:01:51 +00:00
Ian Dowse
f5f1525321 Add IFF_NEEDSGIANT to IFF_CANTCHANGE, to prevent user-level code
from clearing the IFF_NEEDSGIANT flag on Giant-locked interfaces.
In particular, wpa_supplicant was doing this on USB interfaces,
causing panics when Giant-locked code was then called without Giant.

Submitted by:	Alexey Popov
Reviewed by:	rwatson
MFC after:	3 days
2008-03-27 18:02:30 +00:00
Kip Macy
4c908c35e0 fix bonehead cut and paste error in last commit 2007-12-15 22:06:23 +00:00
Kip Macy
a0d231fbb8 Create separate capability flags for TCP over IPv4 and TCP over IPv6 2007-12-15 21:01:48 +00:00
Kip Macy
835a6f1230 add interface capability for TOE 2007-12-15 20:22:09 +00:00
Sam Leffler
de0abf19ba Wake On Lan (WOL) infrastructure
Submitted by:	Stefan Sperling <stsp@stsp.name>
Reviewed by:	brooks
2007-12-10 02:31:00 +00:00
Andre Oppermann
db24121c8b Add IFCAP_LRO flag for drivers to announce their TCP Large Receive Offload
capabilities.
2007-06-11 20:08:11 +00:00
Brooks Davis
bec59525e6 The struct if_data members ifi_recvquota and ifi_xmitquota have been
unused for ages.  Rename them to ifi_spare_char1 and ifi_spare_char2
respectively to indicate this face.
2007-05-16 18:37:37 +00:00
Yaroslav Tykhiy
d562befcdd Fix a couple of typos in a comment. 2007-05-02 11:13:48 +00:00
Andre Oppermann
233dcce118 First step of TSO (TCP segmentation offload) support in our network stack.
o add IFCAP_TSO[46] for drivers to announce this capability for IPv4 and IPv6
 o add CSUM_TSO flag to mbuf pkthdr csum_flags field
 o add tso_segsz field to mbuf pkthdr
 o enhance ip_output() packet length check to allow for large TSO packets
 o extend tcp_maxmtu[46]() with a flag pointer to pass interface capabilities
 o adjust all callers of tcp_maxmtu[46]() accordingly

Discussed on:	-current, -net
Sponsored by:	TCP/IP Optimization Fundraise 2005
2006-09-06 21:51:59 +00:00
Andre Oppermann
60d4ab7abb Improve description of if_capabilities, if_capenable and ifi_hwassist.
Sponsored by:	TCP/IP Optimization Fundraise 2005
2006-09-06 18:06:04 +00:00
Max Laier
0dad3f0e15 Import interface groups from OpenBSD. This allows to group interfaces in
order to - for example - apply firewall rules to a whole group of
interfaces.  This is required for importing pf from OpenBSD 3.9

Obtained from:	OpenBSD (with changes)
Discussed on:	-net (back in April)
2006-06-19 22:20:45 +00:00
John Baldwin
73dbd3da73 Remove various bits of conditional Alpha code and fixup a few comments. 2006-05-12 05:04:46 +00:00
Paul Saab
19cf04981a Implement SIOCGIFCONF for 32bit binaries. 2006-02-02 19:58:37 +00:00
Gleb Smirnoff
75ee267c22 Merge the //depot/user/yar/vlan branch into CVS. It contains some collective
work by yar, thompsa and myself. The checksum offloading part also involves
work done by Mihail Balikov.

The most important changes:

o   Instead of global linked list of all vlan softc use a per-trunk
  hash. The size of hash is dynamically adjusted, depending on
  number of entries. This changes struct ifnet, replacing counter
  of vlans with a pointer to trunk structure. This change is an
  improvement for setups with big number of VLANs, several interfaces
  and several CPUs. It is a small regression for a setup with a single
  VLAN interface.
    An alternative to dynamic hash is a per-trunk static array with
  4096 entries, which is a compile time option - VLAN_ARRAY. In my
  experiments the array is not an improvement, probably because such
  a big trunk structure doesn't fit into CPU cache.
o   Introduce an UMA zone for VLAN tags. Since drivers depend on it,
  the zone is declared in kern_mbuf.c, not in optional vlan(4) driver.
  This change is a big improvement for any setup utilizing vlan(4).
o   Use rwlock(9) instead of mutex(9) for locking. We are the first
  ones to do this! :)
o   Some drivers can do hardware VLAN tagging + hardware checksum
  offloading. Add an infrastructure for this. Whenever vlan(4) is
  attached to a parent or parent configuration is changed, the flags
  on vlan(4) interface are updated.

In collaboration with:	yar, thompsa
In collaboration with:	Mihail Balikov <mihail.balikov interbgc.com>
2006-01-30 13:45:15 +00:00
Gleb Smirnoff
4092996774 Big polling(4) cleanup.
o Axe poll in trap.

o Axe IFF_POLLING flag from if_flags.

o Rework revision 1.21 (Giant removal), in such a way that
  poll_mtx is not dropped during call to polling handler.
  This fixes problem with idle polling.

o Make registration and deregistration from polling in a
  functional way, insted of next tick/interrupt.

o Obsolete kern.polling.enable. Polling is turned on/off
  with ifconfig.

Detailed kern_poll.c changes:
  - Remove polling handler flags, introduced in 1.21. The are not
    needed now.
  - Forget and do not check if_flags, if_capenable and if_drv_flags.
  - Call all registered polling handlers unconditionally.
  - Do not drop poll_mtx, when entering polling handlers.
  - In ether_poll() NET_LOCK_GIANT prior to locking poll_mtx.
  - In netisr_poll() axe the block, where polling code asks drivers
    to unregister.
  - In netisr_poll() and ether_poll() do polling always, if any
    handlers are present.
  - In ether_poll_[de]register() remove a lot of error hiding code. Assert
    that arguments are correct, instead.
  - In ether_poll_[de]register() use standard return values in case of
    error or success.
  - Introduce poll_switch() that is a sysctl handler for kern.polling.enable.
    poll_switch() goes through interface list and enabled/disables polling.
    A message that kern.polling.enable is deprecated is printed.

Detailed driver changes:
  - On attach driver announces IFCAP_POLLING in if_capabilities, but
    not in if_capenable.
  - On detach driver calls ether_poll_deregister() if polling is enabled.
  - In polling handler driver obtains its lock and checks IFF_DRV_RUNNING
    flag. If there is no, then unlocks and returns.
  - In ioctl handler driver checks for IFCAP_POLLING flag requested to
    be set or cleared. Driver first calls ether_poll_[de]register(), then
    obtains driver lock and [dis/en]ables interrupts.
  - In interrupt handler driver checks IFCAP_POLLING flag in if_capenable.
    If present, then returns.This is important to protect from spurious
    interrupts.

Reviewed by:	ru, sam, jhb
2005-10-01 18:56:19 +00:00
Robert Watson
fc57457045 For each interface flag, indicate whether or not it is owned by the
device driver, owned by the network stack, or initialized by the device
driver before attach and read-only from then on.

Not all device drivers and network stack components currently follow
these rules, especially with respect to IFF_UP, and a few exceptions
with IFF_ALLMULTI.

MFC after:	7 days
2005-08-09 12:56:20 +00:00
Robert Watson
292ee7be1c Rename IFF_RUNNING to IFF_DRV_RUNNING, IFF_OACTIVE to IFF_DRV_OACTIVE,
and move both flags from ifnet.if_flags to ifnet.if_drv_flags, making
and documenting the locking of these flags the responsibility of the
device driver, not the network stack.  The flags for these two fields
will be mutually exclusive so that they can be exposed to user space as
though they were stored in the same variable.

Provide #defines to provide the old names #ifndef _KERNEL, so that user
applications (such as ifconfig) can use the old flag names.  Using the
old names in a device driver will result in a compile error in order to
help device driver writers adopt the new model.

When exposing the interface flags to user space, via interface ioctls
or routing sockets, or the two fields together.  Since the driver flags
cannot currently be set for user space, no new logic is currently
required to handle this case.

Add some assertions that general purpose network stack routines, such
as if_setflags(), are not improperly used on driver-owned flags.

With this change, a large number of very minor network stack races are
closed, subject to correct device driver locking.  Most were likely
never triggered.

Driver sweep to follow; many thanks to pjd and bz for the line-by-line
review they gave this patch.

Reviewed by:	pjd, bz
MFC after:	7 days
2005-08-09 10:16:17 +00:00
Andrew Thompson
8f86751705 Add hooks into the networking layer to support if_bridge. This changes struct
ifnet so a buildworld is necessary.

Approved by:	mlaier (mentor)
Obtained from:	NetBSD
2005-06-05 03:13:13 +00:00
Brooks Davis
bc9d299133 Change the definition of struct if_data's member ifi_epoch from wall
clock time to uptime because wall clock time may go backwards.

This is a change in the API which will impact SNMP agents who are using
ifi_epoch to set RFC2233's ifCounterDiscontinuityTime.  None are know to
exist today.  This will not impact applications that are using the
<index, epoch> tuple to verify interface uniqueness except that it
eliminates a race which could lead to a false assumption of uniqueness.

Because this is a behavior change, bump __FreeBSD_version.

Discussed with:	re (jhb, scottl)
MFC after:	3 days
Pointed out by:	pkh (way back at EuroBSDCon)
Pointy hat:	brooks
2005-02-25 19:46:41 +00:00
Warner Losh
c398230b64 /* -> /*- for license, minor formatting changes 2005-01-07 01:45:51 +00:00
John-Mark Gurney
1f48dc25d7 sync comment on IFF_OACTIVE with reality.. IFF_OACTIVE is set when the
hardware cannot take anymore packets, and so will supress the calling of
the device's if_start method...

Submitted by:	bde
2004-11-17 18:32:44 +00:00
Brooks Davis
55287f2a60 Re-add ifi_epoch, to struct if_data, this time replacing ifi_unused
to avoid ABI changes.  It is set to the last time the interface
counters were zeroed, currently the time if_attach() was called.  It is
intentended to be a valid value for RFC2233's ifCounterDiscontinuityTime
and to make it easier for applications to verify that the interface they
find at a given index is the one that was there last time they looked.

Due to space constraints ifi_epoch is a time_t rather then a struct
timeval.  SNMP would prefer higher precision, but this unlikely to be
useful in practice.
2004-09-08 04:50:55 +00:00
Brooks Davis
4ff62bd97b Back out ifi_epoch. The ABI breakage is too disruptive this close to
5-STABLE. ifi_epoch will shortly be reintroduced with less precistion
using the space currently allocated to ifi_unused.
2004-09-02 05:07:29 +00:00
Brooks Davis
9e734b4468 Use a spare byte in struct if_data to store the structure size without
increasing it.  Add code to ifconfig to use this size to find the
sockaddr_dl after the struct if_data in the routing message.  This
allows struct if_data to grow (up to 255 bytes) without breaking
ifconfig.

Submitted by:	peter
2004-09-01 18:22:14 +00:00
Brooks Davis
1fc4519b1d Add a new variable, ifi_epoch, to struct if_data. It is set to the last
time the interface counters were zeroed, currently the time if_attach()
was called.  It is indentended to be a valid value for RFC2233's
ifCounterDiscontinuityTime and to make it easier for applications to
verify that the interface they find at a given index is the one that was
there last time they looked.

An if_epoch "compatability" macro has not been created as ifi_epoch has
never been a member of struct ifnet.

Approved by:	andre, bms, wollman
2004-08-30 06:29:26 +00:00
Robert Watson
af5e59bf28 Add a new network interface flag, IFF_NEEDSGIANT, which will allow
device drivers to declare that the ifp->if_start() method implemented
by the driver requires Giant in order to operate correctly.

Add a 'struct task' to 'struct ifnet' that can be used to execute a
deferred ifp->if_start() in the event that if_start needs to be called
in a Giant-free environment.  To do this, introduce if_start(), a
wrapper function for ifp->if_start().  If the interface can run MPSAFE,
it directly dispatches into the interface start routine.  If it can't
run MPSAFE, we're running with debug.mpsafenet != 0, and Giant isn't
currently held, the task is queued to execute in a swi holding Giant
via if_start_deferred().

Modify if_handoff() to use if_start() instead of direct dispatch.
Modify 802.11 to use if_start() instead of direct dispatch.

This is intended to provide increased compatibility for non-MPSAFE
network device drivers in the presence of Giant-free operation via
asynchronous dispatch.  However, this commit does not mark any network
interfaces as IFF_NEEDSGIANT.
2004-07-27 23:20:45 +00:00
Brooks Davis
f889d2ef8d Major overhaul of pseudo-interface cloning. Highlights include:
- Split the code out into if_clone.[ch].
 - Locked struct if_clone. [1]
 - Add a per-cloner match function rather then simply matching names of
   the form <name><unit> and <name>.
 - Use the match function to allow creation of <interface>.<tag>
   vlan interfaces.  The old way is preserved unchanged!
 - Also the match function to allow creation of stf(4) interfaces named
   stf0, stf, or 6to4.  This is the only major user visible change in
   that "ifconfig stf" creates the interface stf rather then stf0 and
   does not print "stf0" to stdout.
 - Allow destroy functions to fail so they can refuse to delete
   interfaces.  Currently, we forbid the deletion of interfaces which
   were created in the init function, particularly lo0, pflog0, and
   pfsync0.  In the case of lo0 this was a panic implementation so it
   does not count as a user visiable change. :-)
 - Since most interfaces do not need the new functionality, an family of
   wrapper functions, ifc_simple_*(), were created to wrap old style
   cloner functions.
 - The IF_CLONE_INITIALIZER macro is replaced with a new incompatible
   IFC_CLONE_INITIALIZER and ifc_simple consumers use IFC_SIMPLE_DECLARE
   instead.

Submitted by:   Maurycy Pawlowski-Wieronski <maurycy at fouk.org> [1]
Reviewed by:    andre, mlaier
Discussed on:	net
2004-06-22 20:13:25 +00:00
Andre Oppermann
127d7b2d2d Link state change notification of ethernet media to the routing socket.
o Extend the if_data structure with an ifi_link_state field and
  provide the corresponding defines for the valid states.

o The mii_linkchg() callback updates the ifi_link_state field
  and calls rt_ifmsg() to notify listeners on the routing socket
  in addition to the kqueue KNOTE.

o If vlans are configured on a physical interface notify and update
  all vlan pseudo devices as well with the vlan_link_state() callback.

No objections by:	sam, wpaul, ru, bms
Brucification by:	bde
2004-05-03 13:48:35 +00:00
Ruslan Ermilov
3a3b019aeb Added the new interface capability option for drivers that implement
user-configurable polling(4) support.  Make ifconfig(8) aware of it.

Suggested by:	luigi
2004-04-11 13:36:52 +00:00
Warner Losh
f36cfd49ad Remove advertising clause from University of California Regent's
license, per letter dated July 22, 1999 and email from Peter Wemm,
Alan Cox and Robert Watson.

Approved by: core, peter, alc, rwatson
2004-04-07 20:46:16 +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
Ruslan Ermilov
deb62e2887 By popular demand, added the "static ARP" per-interface option. 2003-10-01 08:32:37 +00:00
Sam Leffler
bb68f0af5e o add IF_*bps macros for netbsd compatibility
o add interface capabilities for vlan use and to signal jumbo frame support

Reviewed by:	many
Approved by:	re
2002-11-14 23:16:18 +00:00
Mike Barcroft
edfcad955c style(9):
o Align members of struct if_nameindex.
o Align and sort function prototypes.
2002-10-02 07:55:33 +00:00
Mike Barcroft
f2ba8326cd Use standards visibility conditionals to conditionalize most of this
header (details on how the visibility conditionals work are available
in <sys/cdefs.h>).  Use standard types instead of BSD specific ones,
so that this header compiles in the standards case (specifically this
means changing `u_int' to `unsigned int').
2002-10-02 07:44:50 +00:00
Poul-Henning Kamp
afbe3a0f81 Add the "Monitor" interface flag.
Setting this flag on an ethernet interface blocks transmission of packets
and discards incoming packets after BPF processing.

This is useful if you want to monitor network trafic but not interact
with the network in question.

Sponsored by:	http://www.babeltech.dk
2002-09-27 18:57:47 +00:00
Maxim Sobolev
9717c34cf8 Add IFF_POLLING into the list of flags which are protected from changing via
ioctl(SIOCSIFFLAGS).

MFC after:	1 day
2002-08-28 15:55:49 +00:00