Commit graph

5600 commits

Author SHA1 Message Date
Thomas Veerman
d729ecb11b service: make clear who is printing the error 2012-04-13 13:51:56 +00:00
Thomas Veerman
26ec619a30 VFS: fix filp reuse race
Pipes consist of two filps (read filp and write filp) and a shared
vnode. When the writer leaves the filp reference count drops to
zero and subsequent find_filp()s should not find the filp when a
reader looks for it and the reader gets EOF. However, the pipe()
system call tries to find two filps, marks them in use, and only
after a successful node creation on PFS, overwrites the shared
vnode with the new vnode. Consequently, this leaves a small window
where a just closed 'pipe write filp' gets reused and marked as
present, before becoming the actual new 'pipe write filp' for a new
pipe. A reader for the old pipe will think a writer is present and
wait for that writer to write something or to leave; both actions
should revive the suspended reader. This will never happen and the
reader will be stuck forever.
2012-04-13 13:22:57 +00:00
Thomas Veerman
e292ba487e VFS: more three-level-lock sanity checking 2012-04-13 13:22:42 +00:00
Thomas Veerman
ca7a466f48 TTY: don't allow multiple readers on tty minor
TTY has no way of keeping track of multiple readers for a tty minor
device. Instead, it stores a read request for the last reader only.
Consequently, the first ("overwritten") reader gets stuck on a read
request that's never going to be finished. Also, the overwriting
causes a grant mismatch in VFS when TTY returns a reply for the
second reader.

This patch is a work around for the actual problem (i.e., keeping track
of multiple readers). It checks whether there is a read operation in
progress and returns an error if it is --preventing that reader from
getting overwritten and stuck. It fixes a bug triggered by executing
'top | more' and pressing the space bar for a while (easily reproducable
in a VM, not on hardware).
2012-04-13 13:22:13 +00:00
Thomas Veerman
933120b0b1 VFS: add getting active threads control msg 2012-04-13 13:21:01 +00:00
Thomas Veerman
e1a73469c8 VFS: remove debug print 2012-04-13 13:20:28 +00:00
Thomas Veerman
c2bb739760 VFS: let know when skipping reply 2012-04-13 13:19:45 +00:00
Thomas Veerman
91a38b6d4e VFS: fix dead lock
When running out of worker threads to handle device replies a dead
lock resolver thread is used. However, it was only used for FS
endpoints; it is now used for "system processes" (drivers and FS
endpoints). Also, drivers were marked as system process when they
were not "forced" to map (i.e., mapping was done before endpoint was
alive).
2012-04-13 13:19:10 +00:00
Thomas Veerman
b956493367 VFS: fix new signed/unsigned comparisons 2012-04-13 13:00:11 +00:00
Thomas Veerman
defe329519 VFS: warnings are errors 2012-04-13 12:59:32 +00:00
Thomas Veerman
8dd0880985 Add a simple utility to send control messages
The svrctl utility allows you to send control messages to VFS or PM.
This way you can retrieve runtime information or alter behavior.
2012-04-13 12:58:41 +00:00
Thomas Veerman
0d63d9e125 VFS: enable sending control messages 2012-04-13 12:54:55 +00:00
Thomas Veerman
8ae9987dca libmthread: add stack traces 2012-04-13 12:54:02 +00:00
Thomas Veerman
f571466c56 VFS: find job only if request is an transaction 2012-04-13 12:52:52 +00:00
Thomas Veerman
8f55767619 VFS: make m_in job local
By making m_in job local (i.e., each job has its own copy of m_in instead
of refering to the global m_in) we don't have to store and restore m_in
on every thread yield. This reduces overhead. Moreover, remove the
assumption that m_in is preserved. Do_XXX functions have to copy the
system call parameters as soon as possible and only pass those copies to
other functions.

Furthermore, this patch cleans up some code and uses better types in a lot
of places.
2012-04-13 12:50:38 +00:00
Ben Gras
99866db8cd vm: add MAP_FIXED 2012-04-12 15:01:36 +02:00
Ben Gras
1e2b3f4326 vfs: more regions for coredumps 2012-04-12 14:29:59 +02:00
Ben Gras
e83f7ba2c9 switch to netbsd csu
. file- and functionality-compatible with previous situation
          (FreeBSD csu) (with a crt1.o -> crt0.o symlink in /usr/lib)
        . harmonizes source with netbsd
        . harmonizes linker invocation (e.g. clang) with netbsd
        . helpful to get some arm code in there for the arm port project
2012-04-12 13:26:24 +02:00
Ben Gras
b02992f0c1 test: convert to bsdish Makefile
. smaller, simpler, less duplication, exceptions still
	  encodeable
	. fix for test10: too small a buffer to copy executables
2012-04-12 03:03:17 +02:00
Ben Gras
511c977f93 retire bios_wini 2012-04-12 03:02:21 +02:00
Ben Gras
b480472a76 vm: full memory view
for user-space processes, increase text segment so it reaches the full
address space, so code can be executed anywhere.
2012-04-12 02:58:39 +02:00
Ben Gras
660e15b2d1 vm: break: allow brk() on any region
use the user-supplied point to lookup which region to perform brk() on,
and if it's a reasonable one, do it, no matter what vm's notion of the
heap region is.
2012-04-12 02:57:59 +02:00
Ben Gras
1c7885f932 fix gcc test62 2012-04-12 02:55:04 +02:00
Ben Gras
a2d1372680 Import NetBSD usr.bin/login 2012-04-11 20:02:15 +02:00
David van Moolenbroek
928d76dbe8 Add VBFS: VirtualBox Shared Folder File System
Refer to "man vbfs" on how to mount it.
2012-04-11 00:27:48 +02:00
David van Moolenbroek
bb4d055fa6 Add libvboxfs: VirtualBox shared folders library 2012-04-09 19:25:18 +02:00
David van Moolenbroek
ef7b484e5c Create SFFS library out of HGFS
This Shared Folders File System library (libsffs) now contains all the
file system logic originally in HGFS. The actual HGFS server code is
now a stub that passes on all the work to libsffs. The libhgfs library
is changed accordingly.
2012-04-09 18:08:26 +02:00
David van Moolenbroek
09b327b042 HGFS: move all VMware-specific code into libhgfs 2012-04-09 17:32:36 +02:00
David van Moolenbroek
060399d9dd SEF: add sef_cancel()
This function allows the caller to cancel receiving a message from a
SEF callback. The receive function will then return EINTR.
2012-04-09 16:35:57 +02:00
David van Moolenbroek
6aa61efd09 VBOX: add host/guest communication interface
This interface can be used by other system processes by means of the
newly provided vbox API in libsys.
2012-04-09 15:56:20 +02:00
Ben Gras
ef01931f76 Import NetBSD file(1) 2012-04-03 01:15:36 +02:00
Ben Gras
adb4e9428a add UPDATING note about genassym 2012-04-02 16:32:32 +02:00
Ben Gras
29a24b06a3 clean up master Makefile a bit
. a bit more abstraction (macros) and less duplication
	. also build and install csu, libc, then rest of libraries
	  for future dependency
2012-04-01 03:45:02 +02:00
David van Moolenbroek
4eddbf774c manpages: fix options and examples 2012-03-31 23:47:03 +02:00
Ben Gras
8c4cdbd3c5 import genassym and use it for sconst.h in kernel 2012-03-31 15:29:53 +02:00
Ben Gras
18f3961189 use __restrict instead of restrict
. doesn't choke gcc without -std=c99
	. also used in prototypes already
2012-03-30 17:37:53 +02:00
David van Moolenbroek
fa805ebd1e Kernel/servers/drivers: resolve a few warnings
Flagged by clang 3.1.
2012-03-30 16:55:06 +02:00
Antoine Leca
1972ccefae Actually consider the new su(1) 2012-03-30 02:34:45 +02:00
David van Moolenbroek
638ce89250 hgfs: subsecond timestamp precision
Slightly cleaned up version of patch contributed by Antoine Leca.
2012-03-30 01:40:07 +02:00
Ben Gras
75839b75a1 drop /usr/lib/advent dir (no more advent) 2012-03-29 16:54:21 +02:00
Antoine Leca
d0b2856430 Drop obsolete sdump
The code cannot be compiled, and is not included for over a year.
And it creates a corefile which is obsolete.
2012-03-29 14:15:42 +02:00
Arun Thomas
b0666ba6b6 kernel: Remove unnecessary ACK conditionals 2012-03-29 13:29:09 +02:00
Tomas Hruby
5ab87a6c38 ioapic - missing volatiles
leads to a kernel panic when using clang and SMP

reported by trd <trdempsey.201201@gmail.com>
2012-03-29 00:53:38 -07:00
Ben Gras
1e399dd8bd various kernel printing fixes
. remove some call cycles by low-level functions invoking printf(); e.g.
	  send_sig() gets a return value that the caller should check
	. reason: very-early-phase printf() would trigger a printf() causing
	  infinite recursion -> GPF
	. move serial initialization a little earlier so DEBUG_EXTRA works for
	  serial earlier (e.g. its first instance, for "cstart")
	. closes tracker item 583:
	  System Fails to Complete Startup with Verbose 2 and 3 Boot Parameters,
	  reported by Stephen Hatton / pikpik.
2012-03-28 18:23:12 +02:00
Ben Gras
36db008cb5 adjust netconf for new su behaviour
reported and debugged by Ryan Lie, tracker item 594.
2012-03-28 17:30:56 +02:00
Thomas Veerman
3f775404d9 boot: use high baud rate by default 2012-03-28 08:57:38 +00:00
Ben Gras
a5190194a0 build: don't -L/usr/pkg/lib
You might have to update the compiler-rt package! See UPDATING.

	. the purpose of this -L was solely to find compiler-rt, which contains
	  runtime support code for clang-compiled binaries
	. this also makes all other packaged libraries visible, however
	. it is cleaner to isolate the base system from packages, and so
	  compiler-rt puts itself in /usr/pkg/compiler-rt/lib/ too, which the
	  base system henceforth uses exclusively
	. e.g. this solves a link failure when libfetch is installed as a
	  package
	. the new compiler-rt package also puts itself in /usr/pkg/lib for 'old'
	  systems; that is harmless. The benefit of 'new' systems is that the other
	  packages are hidden.
2012-03-27 12:31:30 +02:00
Ben Gras
a63151d3f8 next release will be 3.2.1 2012-03-27 12:31:30 +02:00
Ben Gras
4de51eedad import NetBSD su 2012-03-27 02:19:46 +02:00
Ben Gras
4f78dfcabc libutil: add O_NOCTTY to old pty open code
. fixes e.g. ssh sessions not getting their own
	  controlling tty (causing ^C getting broadcast to too
	  many processes)
	. previously (before -lutil) handled like this by bsd-openpty.c in
	  openssh
	. reported by Andy Kosela, debugged by ThomasV
2012-03-26 17:00:45 +02:00