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
cards. This basically involves switching to the 12.4.13 firmware, plus
a couple of minor tweaks to the driver.
Also changed the jumbo buffer allocation scheme just a little to avoid
'failed to allocate jumbo buffer' conditions in certain cases.
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
support for relocating the port address if the isa hints specify a
different address from the address the chipset currently has.
Submitted by: Andrew M. Miklic <miklic@ibm.net>
otherwise, the ng_ether.ko KLD will never be unloadable after
all Ethernet interfaces are detached, as it should be, because
of the lingering extra reference.
Submitted by: "Yevmenkin, Maksim N, CSCIO" <myevmenkin@att.com>
due to a paucity of IRQs. I have some reservations about this, so I'm
not going to MFC this just yet. I'm doing this to see how many
problems it causes so we can do this in 4.2. I've been seeing hangs
on my laptop from time to time, but sometimes it was not in polling
mode, other tmies it was. Don't know if this is one problem or more
than one.
Requested by: Sean O Connell
lock up under moderate to heavy load.
The status & command fields share a 32-bit longword. The programming
API of the eepro apparently requires that you update the command field
of a transmit slot that you've already given to the card. This means
the card could be updating the status field of the same longword at
the same time. Since alphas can only operate on 32-bit chunks of
memory, both the status & command fields are loaded from memory &
operated on in registers when the following line of C is executed:
sc->cbl_last->cb_command &= ~FXP_CB_COMMAND_S;
The race is caused by the card DMA'ing up the status at just the wrong
time -- after it has been loaded into a register & before it has been
written back. The old value of the status is written back, clobbering
the status the card just DMA'ed up. The fact that the card has sent
this frame is missed & the transmit engine appears to hang.
Luckily, as numerous people on the freebsd-alpha list pointed out, the
load-locked/store-conditional instructions used by the atomic
functions work with respect changes in memory due to I/O devices. We
now use them to safely update the command field.
Tested by: Bernd Walter <ticso@mail.cicely.de>
errors that plagued those cards with XFree86 4.0. They have two memory
ranges as well as an IO port range to them. Also cleaned up the three
warning messages that I got, from inb(), outb() and linuxulator. Also, I
noticed that the DRI and Glide support for the Voodoo4 and 5 has been
placed upon linux.3dfx.com, too bad they haven't released the tech docs
yet. Apparently, they are still pushing glide for all of us, so I will try
and add support once those tech docs are up.
other systems.
o Normalize copyright text.
o Clean up probe code function interfaces by passing around a single
structure of common arguments instead of passing "too many" args
in each function call.
o Add support for the AAA-131 as a SCSI adapter.
o Add support for the AHA-4944 courtesy of "Matthew N. Dodd" <winter@jurai.net
o Correct manual termination support for PCI cards. The bit definitions
for manual termination control in the SEEPROM were incorrect.
o Add support for extracting NVRAM information from SCB 2 for BIOSen
that use this mechanism to pass this data to OS drivers.
o Properly set the STPWLEVEL bit in PCI config space based on the
setting in an SEEPROM.
o Go back to useing 32byte SCBs for all controllers. The current
firmware allows us to embed 12byte cdbs on all controllers in
a 32byte SCB, and larger cdbs are rarely used, so it is a
better use of this space to offer more SCBs (32).
o Add support for U160 transfers.
o Add an idle loop executed during data transfers that prefetches
S/G segments on controllers that have a secondary DMA engine
(aic789X).
o Improve the performance of reselections by avoiding an extra
one byte DMA in the case of an SCB lookup miss for the reselecting
target. We now keep a 16byte "untagged target" array on the card
for dealing with untagged reselections. If the controller has
external SCB ram and can support 64byte SCBs, then we use an
"untagged target/lun" array to maximize concurrency. Without
external SCB ram, the controller is limited to one untagged
transaction per target, auto-request sense operations excluded.
o Correct the setup of the STPWEN bit in SXFRCTL1. This control
line is tri-stated until set to one, so set it to one and then
set it to the desired value.
o Add tagged queuing support to our target role implementation.
o Handle the common cases of the ignore wide residue message
in firmware.
o Add preliminary support for 39bit addressing.
o Add support for assembling on big-endian machines. Big-endian
support is not complete in the driver.
o Correctly remove SCBs in the waiting for selection queue when
freezing a device queue.
o Now that we understand more about the autoflush bug on the
aic7890, only use the workaround on devices that need it.
o Add a workaround for the "aic7890 hangs the system when you
attempt to pause it" problem. We can now pause the aic7890
safely regardless of what instruction it is executing.
Clean up the comments related to the high speed
sync rate table for SPI.
scsi_message.h:
Bring in some SCSI3 message terminology. All SCSI2 names
are still preserved for backwards compatibility.
Bring back the CAM_NEGOTIATE ccb flag. This flag indicates
that SPI transfer negotiation should occur concurrently with the
execution of this CCB. The flag is not yet used by the XPT but
is required for proper support of multi-initiator configurations
where topology scans cannot rely on a bus reset to invalidate
prior negotiations.
cam_xpt.c:
Don't allow DT transmission rates to be specified for devices
that don't have the DT feature listed in their inquiry data.
