Commit graph

1188 commits

Author SHA1 Message Date
Ben Gras
b258ab0e66 vm: restore stacktrace on SIGSEGV 2013-01-08 15:47:37 +00:00
Kees Jongenburger
c0c581a635 vfs:fix for variable 'rfp' set but not used.
mount.c: In function 'mount_pfs':
mount.c:395:17: error: variable 'rfp' set but not used [-Werror=unused-but-set-variable]

Change-Id: I2f22590ab4e3a4a1678e9096626ebca53d2660e6
2013-01-07 09:12:27 +01:00
Kees Jongenburger
fce5ff6513 vm: Fix sparepage resource leak.
Fix a sparepage resource leak by preventing to call
vm_getsparepage twice.

Change-Id: I06557d47b90a7cca74e0a86921c2579f9618685d
2013-01-07 09:12:09 +01:00
Ben Gras
29edcad310 vm: replace phys avl by array
. make vm be able to use malloc() by overriding brk()
   and minix_mmap() functions
 . phys regions can then be malloc()ed and free()d instead
   of being in an avl tree, which is slightly faster
 . 'offset' field in phys_region can go too (offset is implied
   by position in array) but leads to bigger code changes
2012-12-26 16:14:41 +00:00
Ben Gras
8aeac26999 vfs: fix clobbering fd_nr
dumpcore: fd_nr can be in use as blocking fd but will then be clobbered
by common_open, causing disaster for exiting unpause().
2012-12-11 12:00:57 +01:00
Lionel Sambuc
456a46e6bf Removing useless minix/types.h header
Change-Id: If5f922279b87f075f301b64c7786caa18b434c2a
2012-12-07 13:58:06 +01:00
David van Moolenbroek
3027cf8694 RS: do not zero process name for boot processes
This bug was preventing services with IPC restrictions from being
started before the boot processes are edited from /etc/rc.
2012-12-06 13:24:30 +00:00
David van Moolenbroek
766047123a VFS: fix off-by-one in get_name() 2012-11-30 12:24:47 +00:00
Thomas Veerman
179261a9b6 mtab: support moving mount points
Also fix canonical_path function; it fails to parse some paths
2012-11-29 10:50:51 +00:00
Thomas Veerman
d9f4f71916 Implement dynamic mtab support
With this patch /etc/mtab becomes obsolete.
2012-11-26 15:20:18 +00:00
Thomas Veerman
de83b2a9d9 VFS: change 'last_dir' to match locking assumption
new_node makes the assumption that when it does last_dir on a path, a
successive advance would not yield a lock on a vmnt, because last_dir
already locked the vmnt. This is true except when last_dir resolves
to a directory on the parent vmnt of the file that was the result of
advance. For example,
 # cd /
 # echo foo > home
where home is on a different (sub) partition than / is (default
install). last_dir would resolve to / and advance would resolve to
/home.

With this change, last_dir resolves to the root node on the /home
partition, making the assumption valid again.
2012-11-26 15:20:18 +00:00
Ben Gras
bcbee7d9e1 RS: fix for fix 2012-11-22 16:25:07 +01:00
Erik van der Kouwe
57c748b968 Remove ability to pass commands to bootloader 2012-11-22 19:16:17 +01:00
Erik van der Kouwe
22fa466268 Restore poweroff to some of it's former glory (on QEMU, at least) 2012-11-21 20:28:37 +01:00
Ben Gras
a89ec8bc3b can't get_block(NO_DEV) any more
. 'anonymous' cache blocks (retrieved with NO_DEV as dev
	  parameter) were used to implement read()s from holes in
	  inodes that should return zeroes
	. this is an awkward special case in the cache code though
	  and there's a more direct way to implement the same functionality:
	  instead of copying from a new, anonymous, zero block, to
	  the user target buffer, simply sys_safememset the user target
	  buffer directly. as this was the only use of this feature,
	  this is all that's needed to simplify the cache code a little.
2012-11-16 16:37:44 +01:00
Ben Gras
2d43bf5807 RS: invoke a shell explicitly for scripts
. don't rely on the scripts to be executable
	  (and they aren't any more)
2012-11-16 16:34:14 +01:00
Ben Gras
d27f8afc45 iso9660fs: initialize buffer cache 2012-11-16 11:09:03 +00:00
Tomas Hruby
dedb53fb10 ipc.h - IPC defined as functions again
- CHOOSETRAP define makes impossible to use some common words
  like send, receive and notify in any other context, for
  instance as members or structures

- any reasonable compiler inlines the static inline functions so
  no extra function call overhead is introduced by this change

- this gets us back to the situation before the SYSCALL/SYSENTER
  change. It is not perfect, but it used to work and still does.
2012-11-15 16:51:59 +01:00
Lionel Sambuc
9152e1c5a7 Upgrading build system to new NetBSD revision
The tested targets are the followgin ones:
 * tools
 * distribution
 * sets
 * release

The remaining NetBSD targets have not been disabled nor tested
*at all*. Try them at your own risk, they may reboot the earth.

For all compliant Makefiles, objects and generated files are put in
MAKEOBJDIR, which means you can now keep objects between two branch
switching. Same for DESTDIR, please refer to build.sh options.

Regarding new or modifications of Makefiles a few things:
 * Read share/mk/bsd.README
 * If you add a subdirectory, add a Makefile in it, and have it called
   by the parent through the SUBDIR variable.
 * Do not add arbitrary inclusion which crosses to another branch of
   the hierarchy; If you can't do without it, put a comment on why.
   If possible, do not use inclusion at all.
 * Use as much as possible the infrastructure, it is here to make
   life easier, do not fight it.

Sets and package are now used to track files.
We have one set called "minix", composed of one package called "minix-sys"
2012-11-15 16:07:29 +01:00
David van Moolenbroek
7dd286e6b8 VFS: do not save device node for new regular files
The VFS/FS protocol does not require the file server to supply a
special device node number in response to a REQ_CREATE request, as
this call creates only regular files. Therefore, VFS should not
erroneously save this piece of information from the REQ_CREATE reply
either.
2012-11-15 14:29:59 +00:00
Thomas Veerman
14e470be81 VFS: fix TOCTOU bug in sync 2012-11-14 13:24:53 +00:00
Thomas Veerman
ed23a7a7d2 VFS: fix reboot panic with mounted FUSE FS
Upon reboot VFS semi-exits all processes and unmounts the file system.
However, upon unmount, exiting FUSE file systems might need service from
the file system (due to libc). As the FUSE process is halfway the exit
procedure, it doesn't have a valid root directory and working directory.
Trying to do system calls then triggers a sanity check in VFS.

This fix first exits normal processes which should then allow for
unmounting FUSE file systems. Then VFS exits all processes including
File Servers and unmounts the rest of the file system.
2012-11-14 13:18:16 +00:00
Thomas Veerman
badec36b33 VFS: fix deadlock when out of worker threads
There is a deadlock vulnerability when there are no worker threads
available and all of them blocked on a worker thread that's waiting for a
reply from a driver or a reply from an FS that needs to make a back call. In
these cases the deadlock resolver thread should kick in, but didn't in all
cases. Moreover, POSIX calls from File Servers weren't handled properly
anymore, which also could lead to deadlocks.
2012-11-14 13:12:37 +00:00
Ben Gras
6cf98dbe00 vm: reduce noise in merged pagetable.c 2012-11-09 19:00:46 +01:00
Ben Gras
3771a0833d vm: merge i386 and arm pagetable code 2012-11-09 18:46:03 +01:00
Ben Gras
b1da7fafd0 vm: fix a null dereference on out-of-memory
. also make other out-of-memory conditions less fatal
	. add a test case for a user program using all the memory
	  it can
	. remove some diagnostic prints for situations that are normal
	  when running out of memory so running the test isn't noisy
2012-11-09 18:36:51 +01:00
David van Moolenbroek
ff84d11216 PM: do not panic if sys_sigsend returns ENOMEM 2012-11-09 16:11:02 +00:00
Ben Gras
196021cd82 drop safemap code 2012-10-30 13:55:42 +01:00
Ben Gras
aefc6db005 vm: fix potential null deref 2012-10-24 19:47:47 +02:00
Ben Gras
bd3cde4571 Move primary cache code to libminixfs.
Add primary cache management feature to libminixfs as mfs and ext2
currently do separately, remove cache code from mfs and ext2, and make
them use the libminixfs interface. This makes all fields of the buf
struct private to libminixfs and FS clients aren't supposed to access
them at all. Only the opaque 'void *data' field (the FS block contents,
used to be called bp) is to be accessed by the FS client.

The main purpose is to implement the interface to the 2ndary vm cache
just once, get rid of some code duplication, and add a little
abstraction to reduce the code inertia of the whole caching business.

Some minor sanity checking and prohibition done by mfs in this code
as removed from the generic primary cache code as a result:
        - checking all inodes are not in use when allocating/resizing
          the cache
        - checking readonly filesystems aren't written to
        - checking the superblock isn't written to on mounted filesystems

The minixfslib code relies on fs_blockstats() in the client filesystem to
return some FS usage information.
2012-10-23 19:48:38 +02:00
David van Moolenbroek
46fca87456 VM: munmap fix 2012-10-13 19:08:28 +02:00
Ben Gras
d343041caa VM: make mapping types explicit
Introduce explicit abstractions for different mapping types,
handling the instantiation, forking, pagefaults and freeing of
anonymous memory, direct physical mappings, shared memory and
physically contiguous anonymous memory as separate types, making
region.c more generic.

Also some other genericification like merging the 3 munmap cases
into one.

COW and SMAP safemap code is still implicit in region.c.
2012-10-12 14:52:01 +02:00
Ben Gras
fd4ddef49a VM: munmap used by VM for itself is no longer used 2012-10-12 14:51:35 +02:00
Arun Thomas
471a03a362 ARM support for kernel and vm 2012-10-07 21:38:03 -04:00
Arne Welzel
e35c4f78d2 VFS: fix check_bsf() locking
The check_bsf() macro uses assert(mutex_trylock(&bsf_lock)) and
assumes bsf_lock is locked afterwards. This breaks when compiling
with NOASSERTS="yes". Also: macro to function transition.
2012-09-28 14:57:34 +02:00
Arne Welzel
7e1074732b VFS: resolve unused parameter if NOASSERTS="yes"
If VFS is compiled with NOASSERTS="yes", ctty_opcl() does not
use the op parameter. Change to "non-assert()" sanity check.
2012-09-28 14:57:32 +02:00
Ben Gras
2cdbb3041d procfs: make ipc vectors available 2012-09-26 17:14:14 +02:00
Ben Gras
2d72cbec41 SYSENTER/SYSCALL support
. add cpufeature detection of both
	. use it for both ipc and kernelcall traps, using a register
	  for call number
	. SYSENTER/SYSCALL does not save any context, therefore userland
	  has to save it
	. to accomodate multiple kernel entry/exit types, the entry
	  type is recorded in the process struct. hitherto all types
	  were interrupt (soft int, exception, hard int); now SYSENTER/SYSCALL
	  is new, with the difference that context is not fully restored
	  from proc struct when running the process again. this can't be
	  done as some information is missing.
	. complication: cases in which the kernel has to fully change
	  process context (i.e. sigreturn). in that case the exit type
	  is changed from SYSENTER/SYSEXIT to soft-int (i.e. iret) and
	  context is fully restored from the proc struct. this does mean
	  the PC and SP must change, as the sysenter/sysexit userland code
	  will otherwise try to restore its own context. this is true in the
	  sigreturn case.
	. override all usage by setting libc_ipc=1
2012-09-24 15:53:43 +02:00
Ben Gras
8a3b6ca3bb remove unused <tools.h> 2012-09-20 12:24:22 +02:00
Ben Gras
b16aacc7f3 vm: fix failed alloc condition 2012-09-19 22:24:56 +02:00
Ben Gras
bc4c07f4f1 coverity appeasement - redundant check 2012-09-19 17:19:57 +02:00
Ben Gras
60014efb3e vfs: pm_dumpcore: always clean up process
. whenever this function is called, pm will expect
	  the process to be cleaned up
	. so don't abort the process entirely on error
	. fixes a later 'forking on top of in-use child' vfs panic
2012-09-19 17:13:17 +02:00
Ben Gras
25817b0854 vm: change NO_MEM to a more impossible value
fixes an assert() firing when starting X. thanks to the report by pikpik.

	. NO_MEM was 0, which is actually an existing piece
	  of physical memory. it can't be allocated because it's reserved
	  for bios data (by the kernel), but it can be mapped in (e.g.
	  by X), causing sanity check disaster.
	. NONCONTIGUOUS is also obsolete as all allocations are single-page
	  now, i.e. NONCONTIGUOUS is really the default and only mode.
2012-09-19 15:31:36 +02:00
Ben Gras
fe6e291f59 vm, kernel, top: report memory usage of vm, kernel 2012-09-18 23:43:52 +02:00
Ben Gras
aa82e375c6 VM: remove dead code 2012-09-18 18:40:57 +02:00
Ben Gras
d526f1a0db some coverity fixes. 2012-09-18 15:11:51 +02:00
Ben Gras
ddf1981004 VM: restore >4k secondary cache functionality
. by storing length in the yielded blocks node again
2012-09-18 13:17:52 +02:00
Ben Gras
ed1af3c86c VM: full munmap
complete munmap implementation; single-page references made
a general munmap() implementation possible to write cleanly.

	. memory: let the MIOCRAMSIZE ioctl set the imgrd device
	  size (but only to 0)
	. let the ramdisk command set sizes to 0
	. use this command to set /dev/imgrd to 0 after mounting /usr
	  in /etc/rc, so the boot time ramdisk is freed (about 4MB
	  currently)
2012-09-18 13:17:52 +02:00
Ben Gras
16c3870b2e VM: abstract datastructures a bit
. a little less duplication in region.c
2012-09-18 13:17:51 +02:00
Ben Gras
0d1f2e6be2 VM: simplify slab allocator
. only keep a list of non-empty, non-full pages with slab objects
	. simplifies alloc/free operations and reduces list management overhead
2012-09-18 13:17:50 +02:00