bug (incorrect placement of __start_SECNAME in some cases) that was
fixed in r210245.
There is already an UPDATING entry about needing a recent ld.
MFC after: 1 month
When a fast machine first brings up some non TCP networking program
it is quite possible that we will drop packets due to the fact that
only one packet can be held per ARP entry. This leads to packets
being missed when a program starts or restarts if the ARP data is
not currently in the ARP cache.
This code adds a new sysctl, net.link.ether.inet.maxhold, which defines
a system wide maximum number of packets to be held in each ARP entry.
Up to maxhold packets are queued until an ARP reply is received or
the ARP times out. The default setting is the old value of 1
which has been part of the BSD networking code since time
immemorial.
Expose the time we hold an incomplete ARP entry by adding
the sysctl net.link.ether.inet.wait, which defaults to 20
seconds, the value used when the new ARP code was added..
Reviewed by: bz, rpaulo
MFC after: 3 weeks
Move logic of building ACPI headers for acpi_wakeup.c into better places,
remove intermediate makefile and shell script, and reduce diff between i386
and amd64.
that causes AP bringup to fail if some of the Cell HID-register code
is anywhere in the instruction stream. Pending a better solution, cache
performance on SMP Cell systems running without a hypervisor will be
suboptimal.
The kernel currently does not generate any of the POLL_* constants, but
some applications use them and break if they are not all distinct.
PR: kern/126076
MFC after: 1 week
the "sockarg" ipfw option matches packets associated to
a local socket and with a non-zero so_user_cookie value.
The value is made available as tablearg, so it can be used
as a skipto target or pipe number in ipfw/dummynet rules.
Code by Paul Joe, manpage by me.
Submitted by: Paul Joe
MFC after: 1 week
you tag a socket with an uint32_t value. The cookie can then be
used by the kernel for various purposes, e.g. setting the skipto
rule or pipe number in ipfw (this is the reason SO_USER_COOKIE has
been implemented; however there is nothing ipfw-specific in its
implementation).
The ipfw-related code that uses the optopn will be committed separately.
This change adds a field to 'struct socket', but the struct is not
part of any driver or userland-visible ABI so the change should be
harmless.
See the discussion at
http://lists.freebsd.org/pipermail/freebsd-ipfw/2009-October/004001.html
Idea and code from Paul Joe, small modifications and manpage
changes by myself.
Submitted by: Paul Joe
MFC after: 1 week
Control Algorithms for FreeBSD" FreeBSD Foundation funded project. More details
about the project are available at: http://caia.swin.edu.au/freebsd/5cc/
- Add a KPI and supporting infrastructure to allow modular congestion control
algorithms to be used in the net stack. Algorithms can maintain per-connection
state if required, and connections maintain their own algorithm pointer, which
allows different connections to concurrently use different algorithms. The
TCP_CONGESTION socket option can be used with getsockopt()/setsockopt() to
programmatically query or change the congestion control algorithm respectively
from within an application at runtime.
- Integrate the framework with the TCP stack in as least intrusive a manner as
possible. Care was also taken to develop the framework in a way that should
allow integration with other congestion aware transport protocols (e.g. SCTP)
in the future. The hope is that we will one day be able to share a single set
of congestion control algorithm modules between all congestion aware transport
protocols.
- Introduce a new congestion recovery (TF_CONGRECOVERY) state into the TCP stack
and use it to decouple the meaning of recovery from a congestion event and
recovery from packet loss (TF_FASTRECOVERY) a la RFC2581. ECN and delay based
congestion control protocols don't generally need to recover from packet loss
and need a different way to note a congestion recovery episode within the
stack.
- Remove the net.inet.tcp.newreno sysctl, which simplifies some portions of code
and ensures the stack always uses the appropriate mechanisms for recovering
from packet loss during a congestion recovery episode.
- Extract the NewReno congestion control algorithm from the TCP stack and
massage it into module form. NewReno is always built into the kernel and will
remain the default algorithm for the forseeable future. Implementations of
additional different algorithms will become available in the near future.
- Bump __FreeBSD_version to 900025 and note in UPDATING that rebuilding code
that relies on the size of "struct tcpcb" is required.
Many thanks go to the Cisco University Research Program Fund at Community
Foundation Silicon Valley and the FreeBSD Foundation. Their support of our work
at the Centre for Advanced Internet Architectures, Swinburne University of
Technology is greatly appreciated.
In collaboration with: David Hayes <dahayes at swin edu au> and
Grenville Armitage <garmitage at swin edu au>
Sponsored by: Cisco URP, FreeBSD Foundation
Reviewed by: rpaulo
Tested by: David Hayes (and many others over the years)
MFC after: 3 months
mappings need to end up in the kernel anyway since the kernel begins
executing in OF context. Separating them adds needless complexity,
especially since the powerpc64 and mmu_oea64 code gave up on it a long
time ago.
As a side effect, the PPC ofw_machdep code is no longer AIM-specific,
so move it to powerpc/ofw.
hypervisor infrastructure support:
- Fix coexistence of multiple platform modules in the same kernel
- Allow platform modules to provide an SMP topology
- PowerPC hypervisors limit the amount of memory accessible in real mode.
Allow the platform modules to specify the maximum real-mode address,
and modify the bits of the kernel that need to allocate
real-mode-accessible buffers to respect this limits.
tree in preparation for another large code import. Swinburne University is the
legal entity that owns copyright and the 2-clause BSD licence is acceptable.
The external gpio pins are connected to a PLD on the i2c bus, unfortunatley
this device does not conform by failing to send an ack after each byte written.
The iicbb driver will abort the transfer when the address is not ack'd and it
would introduce a lot of churn to be able to pass a flag down to
iicbb_start/iicbb_write. Instead we do bad things by grabbing the iicbus but
then doing our own bit banging.
symbols of the set_vnet and set_pcpu sections, so those symbols will
always be emitted in kernel modules, if they use vnet.h or pcpu.h.
Also, for pcpu.h, make the __(start|stop)_set_pcpu declarations, and
associated macros invisible to userland, to prevent it picking up these
symbols.
Reviewed by: kib
__stop_xxx symbols for custom sections, even when these were not
referenced (at link time). This behaviour was changed again in binutils
commit 0b8ed435c3fe8bd09a08c23920e65bfb03251221.
This time, put the __GLOBL macro definition in cdefs.h, so it can be
reused in a few other places where it will be needed.
Reviewed by: kib
After KVA space was increased to 512GB on amd64 it became impractical
to use PTEs as entries in the minidump map of dumped pages, because size
of that map alone would already be 1GB.
Instead, we now use PDEs as page map entries and employ two stage lookup
in libkvm: virtual address -> PDE -> PTE -> physical address. PTEs are
now dumped as regular pages. Fixed page map size now is 2MB.
libkvm keeps support for accessing amd64 minidumps of version 1.
Support for 1GB pages is added.
Many thanks to Alan Cox for his guidance, numerous reviews, suggestions,
enhancments and corrections.
Reviewed by: alc [kernel part]
MFC after: 15 days
controller does not perform automatic switching from 1000Mbps link
to 10/100Mbps link when WOL is activated. Implement establishing
10/100Mps link with auto-negotiation in driver. Link status change
handler was modified to remove taskqueue based approach since driver
now needs synchronous handling for link establishment.
Submitted by: Yamagi Burmeister (lists <> yamagi.org ) (initial version)
Tested by: Yamagi Burmeister (lists <> yamagi.org )
MFC after: 1 week
libcompiler_rt.a is a BSD licensed C language runtime, which implements
many routines which are linked into binaries on architectures where
certain functionality is missing (e.g. 64 bits mul/div on i386).
Unfortunately, libcompiler_rt cannot replace libgcc entirely. Certain
features, such as an unwinder for exception handling, are missing.
That's why only libgcc.a is replaced for now, because this one does seem
to be complete.
Tested by: rene (amd64), nwhitehorn (powerpc), droso (i386 exprun)
and many others. Thanks!
Obtained from: user/ed/compiler-rt
routines.
This unbreaks Book-E build after the recent machine/mutex.h removal.
While there move tlb_*lock() prototypes to machine/tlb.h.
Submitted by: jhb
"arg0 'provider': Invalid argument" after creating new partition
table.
Move code for search of existing geom into g_part_find_geom
function and use this function instead of g_part_parm_geom
in g_part_ctl_create.
Approved by: kib (mentor)
deallocate_dependencies() is done. This opens a race between softdep
thread and the thread that does the truncation:
A write of the indirect block causes the freeblks to become
ALLCOMPLETE while softdep_setup_freeblocks() dropped softdep lock. And
then, softdep_disk_write_complete() would reassign the workitem to the
mount point worklist, causing premature processing of the workitem, or
journal write exhaust the fb_jfreeblkhd and handle_written_jfreeblk does
the same reassign.
indir_trunc() then would find the indirect block that is locked (with lock
owned by kernel) but without any dependencies, causing it to hang in
getblk() waiting for buffer lock.
Do not mark freeblks as DEPCOMPLETE until deallocate_dependencies()
finished.
Analyzed, suggested and reviewed by: jeff
Tested by: pho
even if there is no route out to that mcast address. The code in
in_pcb inadvertantly would error (no route) even though
the user may have specified the address with the
proper socket option (to specify the egress interface).
Thanks bz for reminding me I forgot to commit this ;-)
Reviewed by: bz
MFC after: 1 week
and updated comments in the usb_quirk.h header file.
The main purpose of this is to expose the quirks for ejecting 3G
modules. usb_modeswitch in Linux does a great job of collecting
information on these, and with the quirks module people can try out the
modeswitch config file entries on FreeBSD, hence the SCSI strings in the
man page.
MFC after: 2 weeks
