upas/common: deliver mail to mdir as .tmp file and rename after it has been fully written
theres a race condition when mail delivery to mdir is slow,
then upas/fs sees partial mail file and caches the truncated
file size.
to avoid this, delivery will create the new mail file with
the .tmp extension (which is ignored by upas/fs) and after
everything has been written, rename it to the final name.
kernel: avoid waserror() botch in devwalk (from drawterm, thanks aiju)
calculate alloc flag before waserror(), as compilers like
gcc will not notice the value changing later because
setjump() restores the old value due to callee-saves.
change is applies here to make it easier to merge with
drawterm.
thanks to aiju for debugging this; used to cause drawterm
memory leak until compiled with gcc -O0.
tlshand: fix mpint to bytes conversion, reorganize send/recv buffer, check for overflow in msgSend()
when converting mpint to bytes, always pad it to the size of
the modulus (RSA,DHE,ECDHE). mptobytes() now takes a byte len
parameter which the caller usually calculates from the group
modulus using mpsignif(). this bug sometimes caused "bad record mac"
after the handshake.
use a shared buffer, given that msgSend()/msgRecv() don't overlap
we can use the first half for sending, and the top half for
receiving, shifting down as neccesary. the space beween sendp and
recvp is free.
nusb/lib: make usbcmd() return value symmetic; returning size of data phase (if any) (thanks aiju)
usbcmd() with Rh2d used to return the command size (8+ndata) wile returning
only ndata for Rd2h. this changes it to always return ndata for Rh2d. it
mostly doesnt matter as Rh2d callers only check r < 0 for error, but this
makes the interface symmetic.
cinap_lenrek [Thu, 30 Mar 2017 21:33:46 +0000 (23:33 +0200)]
sdnvme: don't write completion queue doorbell register when nothing has been processed
turns out on real hardware, the front falls off if we write
the completion queue doorbell registers without consuming
an entry. so only write the register when we have processed
something.
cinap_lenrek [Tue, 28 Mar 2017 22:30:53 +0000 (00:30 +0200)]
kernel: fix twakeup()/timerdel() race condition
timerdel() did not make sure that the timer function
is not active (on another cpu). just acquiering the
Timer lock in the timer function only blocks the caller
of timerdel()/timeradd() but not the other way arround
(on a multiprocessor).
this changes the timer code to track activity of
the timer function, having timerdel() wait until
the timer has finished executing.
cinap_lenrek [Tue, 28 Mar 2017 22:21:35 +0000 (00:21 +0200)]
sdnvme: NVMe controller driver (work in progress)
basic NVMe controller driver, reads and writes work.
"namespaces" show up as logical units.
uses pin/msi interrupts (no msi-x support yet).
one submission queue per cpu, shared completion queue.
no recovery from fatal controller errors.
only tested in qemu (no hardware available).
commiting this so it can be found by someone who has
hardware.
spew [Sat, 25 Mar 2017 18:05:47 +0000 (13:05 -0500)]
games/galaxy: parallelize gravitational force calculations
Once the Barnes-Hut tree is constructed, the gravitational
force calculations can be done in parallel by dividing the
bodies up between a number of procs.
cinap_lenrek [Sat, 25 Mar 2017 03:08:14 +0000 (04:08 +0100)]
pc kernel: handle PCMP and RSD being in low (kaddr) or reserved (vmap) memory
on thinkpad x1v4, the PCMP structure resides in upper reserved memory
pa=0xd7f49000 - while system memory ends at 0x0ffff000; so we have to
vmap() it instead of KADDR().
the RSD structure for ACPI might reside in low memory, so we sould
KADDR() in that case.
cinap_lenrek [Thu, 23 Mar 2017 00:31:35 +0000 (01:31 +0100)]
upas/smtp: fix cram-md5 auth, simplify doauth(), check varargs for dBprint()
- smtpcram() was replying with the challenge instead of the response... m(
- simplify doauth, use error string for auth_getuserpasswd() error logging
- enable #pragma varargck for dBprint()
spew [Wed, 22 Mar 2017 05:04:24 +0000 (00:04 -0500)]
[012568kqv]a: correctly lex full range of integers in the assemblers (thanks Ori_B)
The Plan 9 assemblers use strtoll to parse the integer literals
in their input. It turns out that this is almost correct, but
VLONG_MIN is clamped. This patch changes to use strtoull
in order to allow the full range of integers.
cinap_lenrek [Sun, 19 Mar 2017 02:05:24 +0000 (03:05 +0100)]
5l,6l,8l,kl,ql,vl: allow duplicate GLOBAL symbols (from Ori Bernstein)
The plan 9 assemblers support the DUPOK flag on text symbols. They parse and
ignore it on GLOBL symbols. This patch makes it work in the linkers.
The reason I ran into this is because my programming language (Myrddin) uses
data symbols to generate type information, and it's useful to avoid
duplicating all of the type info in every file that gets generated.
cinap_lenrek [Sat, 18 Mar 2017 15:58:27 +0000 (16:58 +0100)]
devmouse: refactor screen blanking logic
devmouse controls the screen blanking timeout, so move the
code there avoiding cross calls between modules. the only
function that needs to be provided is blankscreen(), which
gets called with drawlock locked.
the blank timeout is set thru /dev/mousectl now, so kernels
without devvga can set it.
blanking now only happens while /dev/mouse is read. so this
avoids accidentally blanking the screen on cpu servers that
do not have a mouse to unblank it.
cinap_lenrek [Wed, 15 Mar 2017 18:30:33 +0000 (19:30 +0100)]
upas/fs: getting rid of the fine-grain locking...
now that locking works, its time to get rid of it.
given that the only concurrency is between the periodic reader
process and the filesystem code, just make sure the filesystem
rpc handlers do not run concurrenty while syncing is in progress
with a single qlock.
spew [Sun, 12 Mar 2017 23:24:45 +0000 (18:24 -0500)]
games/galaxy: fix zoom
Zooming when far away from the center of gravity
of the galaxy would zoom the center of the screen
out of view. Now adjust the origin so that the
center of the screen stays centered