Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Mechanically substitute flags from historic mbuf allocator with
malloc(9) flags in sys/dev.

ether_ifattach() sets if_mtu to ETHERMTU, don't bother set it again

Reviewed by: yongari

Add new tunable 'net.link.ifqmaxlen' to set default send interface
queue length. The default value for this parameter is 50, which is
quite low for many of today's uses and the only way to modify this
parameter right now is to edit if_var.h file. Also add read-only
sysctl with the same name, so that it's possible to retrieve the
current value.

MFC after: 1 month

- Add a private timer to drive the transmit watchdog instead of using
if_watchdog and if_timer.
- Fix some issues in detach for sn(4), ste(4), and ti(4). Primarily this
means calling ether_ifdetach() before anything else.

- vx_stop() requires the driver lock to be held.
- Add some missing newlines to messages printed by vx_getlink().

MFC after: 3 days

- Store pointer to the link-level address right in "struct ifnet"
rather than in ifindex_table[]; all (except one) accesses are
through ifp anyway. IF_LLADDR() works faster, and all (except
one) ifaddr_byindex() users were converted to use ifp->if_addr.

- Stop storing a (pointer to) Ethernet address in "struct arpcom",
and drop the IFP2ENADDR() macro; all users have been converted
to use IF_LLADDR() instead.

Rototill vx(4), add locking, and mark MPSAFE:
- Rename vxfoo() functions to vx_foo() to improve readability and
consistency with other drivers.
- Prefix most the softc members with 'vx_' (the other members already had
the prefix).
- Switch to using callout_init_mtx() and callout_*() rather than
timeout() and untimeout().
- Add some missing calls to if_free() in some failure cases in vx_attach().
- Use if_printf() and remove the unit number from the softc.
- Remove uses of the 'register' keyword and spls.
- Add locked variants of vx_init() and vx_start().
- Add a mutex to the softc and lock it in various appropriate places.
- Setup the interrupt handler last during attach.

Tested by: imp
MFC after: 1 week

Propagate rename of IFF_OACTIVE and IFF_RUNNING to IFF_DRV_OACTIVE and
IFF_DRV_RUNNING, as well as the move from ifnet.if_flags to
ifnet.if_drv_flags. Device drivers are now responsible for
synchronizing access to these flags, as they are in if_drv_flags. This
helps prevent races between the network stack and device driver in
maintaining the interface flags field.

Many __FreeBSD__ and __FreeBSD_version checks maintained and continued;
some less so.

Reviewed by: pjd, bz
MFC after: 7 days

Don't drop frames if interface is in promiscuous mode.

PR: kern/83833
Submitted by: Eygene A. Ryabinkin
MFC after: 3 days

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

Remove bus_{mem,p}io.h and related code for a micro-optimization on i386
and amd64. The optimization is a trivial on recent machines.

Reviewed by: -arch (imp, marcel, dfr)

Fix up assignment of negative number to char. Char's are unsigned by
default on PowerPC.

Approved by: mdodd

Start each of the license/copyright comments with /*-, minor shuffle of lines

ss if_vx through indent, and use ANSI function definitions, prior to adding
if_media and DMA support to the driver. The previous style was inconsistent
making it difficult to emulate existing style.

Since if_vx doesn't contain locking or run with INTR_MPSAFE, mark
the interface as IFF_NEEDSGIANT so if_start is run holding Giant.

We don't need to initialize if_output, ether_ifattach() does it
for us.

Announce ethernet MAC addresss in ether_ifattach().

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)

Start to minimize diffs between vx and ep. These latter is based on a
more advanced version of the chips supported by the former. Matt Dodd
and I are working towards merging them, and this a step on that path.

Use __FBSDID().
Also some minor style cleanups.

Forced commit to note that the previous committed related to:

PR: kern/51555

Revert part of rev 1.43. We want to fail gracefully if there is no packet
waiting in the interface queue.

Submitted by: Yeasah Pell <yeasah@apocalypse.org>

Introduce an M_ASSERTPKTHDR() macro which performs the very common task
of asserting that an mbuf has a packet header. Use it instead of hand-
rolled versions wherever applicable.

Submitted by: Hiten Pandya <hiten@unixdaemons.com>

Back out M_* changes, per decision of the TRB.

Approved by: trb

Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.
Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.

network interface driver changes:

o don't strip the Ethernet header from inbound packets; pass packets
up the stack intact (required significant changes to some drivers)
o reference common definitions in net/ethernet.h (e.g. ETHER_ALIGN)
o track ether_ifattach/ether_ifdetach API changes
o track bpf changes (use BPF_TAP and BPF_MTAP)
o track vlan changes (ifnet capabilities, revised processing scheme, etc.)
o use if_input to pass packets "up"
o call ether_ioctl for default handling of ioctls

Reviewed by: many
Approved by: re

Fix mis-indentation.

Spotted by: FlexeLint

Use if_printf(ifp, "blah") instead of printf("vx%d: blah", ifp->if_unit).

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

Remove __P.

Get rid of the twisted MFREE() macro entirely.

Reviewed by: dg, bmilekic
MFC after: 3 days

Quiet a variable format-string warning.

MFC after: 1 week

Change m_devget()'s outdated and unused `offset' argument to actually mean
something: offset into the first mbuf of the target chain before copying
the source data over.

Make drivers using m_devget() with a first argument "data - ETHER_ALIGN"
to use the offset argument to pass ETHER_ALIGN in. The way it was previously
done is potentially dangerous if the source data was at the top of a page
and the offset caused the previous page to be copied (if the
previous page has not yet been appropriately mapped).

The old `offset' argument in m_devget() is not used anywhere (it's always
0) and dates back to ~1995 (and earlier?) when support for ethernet trailers
existed. With that support gone, it was merely collecting dust.

Tested on alpha by: jlemon
Partially submitted by: jlemon
Reviewed by: jlemon
MFC after: 3 weeks

When I converted this driver, I neglected to deal with packet alignment.
We must force payload alignment to a longword boundary to make the
alpha happy. This should stop the driver from trapping on the alpha
when the interface is ifconfig'ed (actually, when the first frame is
received).

Update the vortex driver so that it no longer needs the PCI compat
interface. In addition to using newbus, it also uses bus_space rather
than inb/outb to make it MI. The grody static softc allocation stuff
has been removed as well.

Remove unneeded #include <machine/clock.h>

Make all Ethernet drivers attach using ether_ifattach() and detach using
ether_ifdetach().

The former consolidates the operations of if_attach(), ng_ether_attach(),
and bpfattach(). The latter consolidates the corresponding detach operations.

Reviewed by: julian, freebsd-net

be sure to wipe out m_pkthdr when you set M_PKTHDR, you may see junk pointer
in m_pkthdr portion.
actually, we should not change pkthdr mbuf <-> non-pkthdr mbuf.

Move code to handle BPF and bridging for incoming Ethernet packets out
of the individual drivers and into the common routine ether_input().
Also, remove the (incomplete) hack for matching ethernet headers
in the ip_fw code.

The good news: net result of 1016 lines removed, and this should make
bridging now work with *all* Ethernet drivers.

The bad news: it's nearly impossible to test every driver, especially
for bridging, and I was unable to get much testing help on the mailing
lists.

Reviewed by: freebsd-net

This driver attempts to cache mbufs, and re-use them as headers instead
of using the MGETHDR macro all the time. When an mbuf is reused as a
header, initialize csum_flags to zero as well, so the delayed_checksum
call woks properly.

Debbugging work done by: jmas

Remove #if NVX > 0 and #if NEISA > 0 (and #include "eisa.h") as it's not
needed.

Set ifq_maxlen to default (IFQ_MAXLEN).

Remove NBPF conditionality of bpf calls in most of our network drivers.

This means that we will not have to have a bpf and a non-bpf version
of our driver modules.

This does not open any security hole, because the bpf core isn't loadable

The drivers left unchanged are the "cross platform" drivers where the respective
maintainers are urged to DTRT, whatever that may be.

Add a couple of missing FreeBSD tags.

$Id$ -> $FreeBSD$

Rename bpfilter to bpf.

Fix warnings preparing for -Wall -Wcast-qual

Also disable one usb module in LINT due to fatal compilation errors,
temporary.

Switch type of vxintr instead of using the previous casts.

Requested by: bde

Fixed printf format errors (only 1 left in GENERIC now).

This commit fixes various 64bit portability problems required for
FreeBSD/alpha. The most significant item is to change the command
argument to ioctl functions from int to u_long. This change brings us
inline with various other BSD versions. Driver writers may like to
use (__FreeBSD_version == 300003) to detect this change.

The prototype FreeBSD/alpha machdep will follow in a couple of days
time.

Add $Id$

Provide a missing parameter to printf to stop the kernel from panicing.

Removed unused #includes.

Make INET a proper option.

This will not make any of object files that LINT create change; there
might be differences with INET disabled, but hardly anything compiled
before without INET anyway. Now the 'obvious' things will give a
proper error if compiled without inet - ipx_ip, ipfw, tcp_debug. The
only thing that _should_ work (but can't be made to compile reasonably
easily) is sppp :-(

This commit move struct arpcom from <netinet/if_ether.h> to
<net/if_arp.h>.

Remove a bunch of variables which were unused both in GENERIC and LINT.

Found by: -Wunused

To obey the traditional practice in mbuf chaining.

PR: 4020
Reviewed by: hamada@astec.co.jp

Convert to the new callout interface.
Guard against scheduling more than one callout.

Removed unused #includes.

Don't include <sys/ioctl.h> in the kernel. Stage 2: include
<sys/sockio.h> instead of <sys/ioctl.h> in network files.

Some of these cards are always in promiscous mode :-(
If you enable ip forwarding your net melts down.
This is a workaround, probably not the correct fix.

Use the new if_multiaddrs list for multicast addresses rather than the
previous hackery involving struct in_ifaddr and arpcom. Get rid of the
abominable multi_kludge. Update all network interfaces to use the
new machanism. Distressingly few Ethernet drivers program the multicast
filter properly (assuming the hardware has one, which it usually does).

Support 4 of these as default, it only cost us 12 bytes more.

Some imporvemnets to the vx driver.
1. 'connector_table' is shortened to 'conn_tab'.
2. More reliable connector change code.
3. Display message like "vx0: selected bnc. (link1)"
when the connector changed by link[012].
4. Handle MII properly.
5. Potentially slightly better performance.
6. Fixed a silly typo.

Submitted by: Naoki Hamada <nao@sbl.cl.nec.co.jp>

Fix ifconfig link flag handling
Submitted by: "Jon Morgan" <morgan@terminus.trailblazer.com>

New vx driver for:

3COM 3C590 Etherlink III PCI,
3COM 3C595 Fast Etherlink PCI,
3COM 3C592 Etherlink III EISA,
3COM 3C590 Fast Etherlink EISA,
3COM 3C900 Etherlink XL PCI and
3COM 3C905 Fast Etherlink XL PCI.

This driver is based on OpenBSD's driver. I modified it to run under FreeBSd
and made it actually work usefully.
Afterwards, nao@tom-yam.or.jp (HAMADA Naoki) added EISA support as well as
early support for 3C900 Etherlink XL PCI and 3C905 Fast Etherlink XL PCI.
He also split up the driver in a bus independant and bus dependant parts.

Especially the 3c59X support should be pretty stable now.

Submitted by: partly nao@tom-yam.or.jp (HAMADA Naoki)
Obtained from:partly OpenBSD