buffer fills up causing the remote sender to enter into persist mode, but
there is still room available in the receive buffer when a window probe
arrives (either due to window scaling, or due to the local application
very slowing draining data from the receive buffer), then the single byte
of data in the window probe is accepted. However, this can cause rcv_nxt
to be greater than rcv_adv. This condition will only last until the next
ACK packet is pushed out via tcp_output(), and since the previous ACK
advertised a zero window, the ACK should be pushed out while the TCP
pcb is write-locked.
During the window while rcv_nxt is greather than rcv_adv, a few places
would compute the remaining receive window via rcv_adv - rcv_nxt.
However, this value was then (uint32_t)-1. On a 64 bit machine this
could expand to a positive 2^32 - 1 when cast to a long. In particular,
when calculating the receive window in tcp_output(), the result would be
that the receive window was computed as 2^32 - 1 resulting in advertising
a far larger window to the remote peer than actually existed.
Fix various places that compute the remaining receive window to either
assert that it is not negative (i.e. rcv_nxt <= rcv_adv), or treat the
window as full if rcv_nxt is greather than rcv_adv.
Reviewed by: bz
MFC after: 1 month
of the 61 bits available within the region for virtual addressing. Since
there's no good way for us to map out the gap in the virtual address space,
limit KVA to the architectural minimum implemented address bits. This still
gives us 1 petabyte of KVA, so no worries.
developers committing new code with broken include directories.
Fix a few whitespace issues.
Improve a couple of comments.
-W is now deprecated and is referred to as -Wextra (see gcc(1)).
Submitted by: arundel
of endian-ness issues with the AR724x.
From Luiz:
* Fix the bus space tag used so endian-ness is correctly handled;
* Only do the workaround for the AR7240; AR7241/AR7242 (PB92)
don't require this
From me:
* Add a read flush from openwrt
Submitted by: Luiz Otavio O Souza
use the PBVM. This eliminates the implied hardcoding of the
physical address at which the kernel needs to be loaded. Using the
PBVM makes it possible to load the kernel irrespective of the
physical memory organization and allows us to replicate kernel text
on NUMA machines.
While here, reduce the direct-mapped page size to the kernel's
page size so that we can support memory attributes better.
kernel configurations to apply WITH_* WITHOUT_* knobs we use for
module building as well to restrict or control opt_*.h flags.
Reviewed by: imp, +
Sponsored by: The FreeBSD Foundation
Sponsored by: iXsystems
MFC after: 2 weeks
to get the files for an IPv6 only kernel as well, remove extra inet6
option where not needed.
Reviewed by: gnn
Sponsored by: The FreeBSD Foundation
Sponsored by: iXsystems
MFC after: 4 days
This is reported to work on the AR7240 based Ubiquiti Rocket M5
but I haven't tested it on that hardware. I also don't yet have
it fully working on the AR7242 based development board here;
probe/attach functions but the register space resource looks like
the endian-ness is wrong (0x10000000 instead of 0x00001000).o
Further digging will be required.
Submitted by: Luiz Otavio O Souza
Add some comments at #endifs given more nestedness. To make the compiler
happy, some default initializations were added in accordance with the style
on the files.
Reviewed by: gnn
Sponsored by: The FreeBSD Foundation
Sponsored by: iXsystems
MFC after: 4 days
Some bugs where fixed while doing this:
* ASCONF-ACK messages might use wrong port number when using
IPv6.
* Checking for additional addresses takes the correct address
into account and also does not do more comparisons than
necessary.
This patch is based on one received from bz@ who was
sponsored by The FreeBSD Foundation and iXsystems.
MFC after: 1 week
as well compiling out most functions adding or extending #ifdef INET
coverage.
Reviewed by: gnn
Sponsored by: The FreeBSD Foundation
Sponsored by: iXsystems
MFC after: 4 days
wrapper around rman_adjust_resource(). Include a generic implementation,
bus_generic_adjust_resource() which passes the request up to the parent
bus. There is currently no default implementation. A
bus_adjust_resource() wrapper is provided for use in drivers.
sectors with all-zeroes.
The zeroes come from a static buffer; null(4) uses a dynamic buffer for
the same purpose (for /dev/zero). It might be a good idea to have a
static, shared, read-only all-zeroes page somewhere in the kernel that
md(4), null(4) and any other code that needs zeroes could use.
Reviewed by: kib
MFC after: 3 weeks
Specifically, these changes allow a resource to back a relocatable and
resizable resource such as the I/O window decoders in PCI-PCI bridges.
- rman_adjust_resource() can adjust the start and end address of an
existing resource. It only succeeds if the newly requested address
space is already free. It also supports shrinking a resource in
which case the freed space will be marked unallocated in the rman.
- rman_first_free_region() and rman_last_free_region() return the
start and end addresses for the first or last unallocated region in
an rman, respectively. This can be used to determine by how much
the resource backing an rman must be adjusted to accomodate an
allocation request that does not fit into the existing rman.
While here, document the rm_start and rm_end fields in struct rman,
rman_is_region_manager(), the bound argument to
rman_reserve_resource_bound(), and rman_init_from_resource().
