Commit Graph

8506 Commits

Author SHA1 Message Date
phk
ef82a51634 Here follows the new kernel dumping infrastructure.
Caveats:

The new savecore program is not complete in the sense that it emulates
enough of the old savecores features to do the job, but implements none
of the options yet.

I would appreciate if a userland hacker could help me out getting savecore
to do what we want it to do from a users point of view, compression,
email-notification, space reservation etc etc.  (send me email if
you are interested).

Currently, savecore will scan all devices marked as "swap" or "dump" in
/etc/fstab _or_ any devices specified on the command-line.

All architectures but i386 lack an implementation of dumpsys(), but
looking at the i386 version it should be trivial for anybody familiar
with the platform(s) to provide this function.

Documentation is quite sparse at this time, more to come.

Details:

ATA and SCSI drivers should work as the dump formatting code has been
removed.  The IDA, TWE and AAC have not yet been converted.

Dumpon now opens the device and uses ioctl(DIOCGKERNELDUMP) to set
the device as dumpdev.  To implement the "off" argument, /dev/null
is used as the device.

Savecore will fail if handed any options since they are not (yet)
implemented.  All devices marked "dump" or "swap" in /etc/fstab
will be scanned and dumps found will be saved to diskfiles
named from the MD5 hash of the header record.  The header record
is dumped in readable format in the .info file.  The kernel
is not saved.  Only complete dumps will be saved.

All maintainer rights for this code are disclaimed: feel free to
improve and extend.

Sponsored by:   DARPA, NAI Labs
2002-03-31 22:37:00 +00:00
phk
64158fc8ed A couple of bits survived Dans nukage of CV_DEBUG in favour of INVARIANTS,
take them out with tacticals.
2002-03-31 07:23:31 +00:00
phk
87273d930a Centralize the "bootdev" and "dumpdev" variables. They are still pretty
bogus all things considered, but at least now they don't camouflage as
being MD variables.
2002-03-31 07:15:28 +00:00
alc
3778bbd36e Implement i386's (o)sigreturn() like the alpha's: Use copyin() to read
the osigcontext or ucontext_t rather than useracc() followed by direct user-
space memory accesses.  This reduces (o)sigreturn()'s execution time by 5-
50%.

Submitted by:	bde
2002-03-31 01:13:21 +00:00
jake
8f9ce8398d Remove abuse of intr_disable/restore in MI code by moving the loop in ast()
back into the calling MD code.  The MD code must ensure no races between
checking the astpening flag and returning to usermode.

Submitted by:	peter (ia64 bits)
Tested on:	alpha (peter, jeff), i386, ia64 (peter), sparc64
2002-03-29 16:35:26 +00:00
jhb
d8b2f99c44 GC #if 0'd assembly mutex micro operations. If someone wants to bring
these back later then can get them from the attic.  Also, GC, some stale
macros to acquire and release sleep mutexes in assembly.
2002-03-28 15:14:23 +00:00
nyan
7703eadb26 Remove unneeded pc98 hack. 2002-03-28 12:13:57 +00:00
obrien
2b39669377 style(9)
Approved by:	jake
2002-03-28 02:54:44 +00:00
jeff
dff418f166 Add a new mtx_init option "MTX_DUPOK" which allows duplicate acquires of locks
with this flag.  Remove the dup_list and dup_ok code from subr_witness.  Now
we just check for the flag instead of doing string compares.

Also, switch the process lock, process group lock, and uma per cpu locks over
to this interface.  The original mechanism did not work well for uma because
per cpu lock names are unique to each zone.

Approved by:	jhb
2002-03-27 09:23:41 +00:00
dillon
3e06b51f19 Tab-out the backslashes in icu_vector.s to make it more readable and to
match it up with apic_vector.s.
2002-03-27 05:43:11 +00:00
dillon
dc5aafeb94 Compromise for critical*()/cpu_critical*() recommit. Cleanup the interrupt
disablement assumptions in kern_fork.c by adding another API call,
cpu_critical_fork_exit().  Cleanup the td_savecrit field by moving it
from MI to MD.  Temporarily move cpu_critical*() from <arch>/include/cpufunc.h
to <arch>/<arch>/critical.c (stage-2 will clean this up).

Implement interrupt deferral for i386 that allows interrupts to remain
enabled inside critical sections.  This also fixes an IPI interlock bug,
and requires uses of icu_lock to be enclosed in a true interrupt disablement.

This is the stage-1 commit.  Stage-2 will occur after stage-1 has stabilized,
and will move cpu_critical*() into its own header file(s) + other things.
This commit may break non-i386 architectures in trivial ways.  This should
be temporary.

Reviewed by:	core
Approved by:	core
2002-03-27 05:39:23 +00:00
phk
5785423ddf Uncomment GEOM in LINT 2002-03-26 19:39:32 +00:00
hm
25f947ea14 Add support for Q.931 subaddresses.
Submitted by: Steven Looman <fsteevie@wish.net>
2002-03-26 15:13:54 +00:00
nsouch
ecc9a88e1e Fix bktr and pcf compilation with LINT 2002-03-25 21:22:35 +00:00
obrien
8842976cdd Guard against redefining __gnuc_va_list. 2002-03-24 11:25:46 +00:00
bde
83dd3dfdc2 Fixed some style bugs in the removal of __P(()). Continuation lines
were not outdented to preserve non-KNF lining up of code with parentheses.
Switch to KNF formatting.
2002-03-24 04:09:05 +00:00
will
7342c8c661 Minor changes:
[1] Support the Sony VAIO Jogdial in moused(8).
 [2] Modify spic(4) to support additional Sony VAIO models.

Submitted by:	[1] Juriy Goloveshkin <j@gu.ru>,
		[2] Akira Funahashi <funa@funa.org>
Tested by:	cjh, jim, Jerry A! <jerry@thehutt.org>
Approved by:	nsayer
MFC after:	2 weeks
2002-03-24 03:07:07 +00:00
nsouch
02266d8017 Forgot viapm in the NOTES. Fixed. 2002-03-23 18:39:54 +00:00
bde
8e5d7bb37a Fixed some style bugs in the removal of __P(()). The main ones were
not removing tabs before "__P((", and not outdenting continuation lines
to preserve non-KNF lining up of code with parentheses.  Switch to KNF
formatting and/or rewrap the whole prototype in some cases.
2002-03-23 16:01:49 +00:00
nsouch
82395b7295 Major rework of the iicbus/smbus framework:
- VIA chipset SMBus controllers added
	- alpm driver updated
	- Support for dynamic modules added
	- bktr FreeBSD smbus updated but not tested
	- cleanup
2002-03-23 15:49:15 +00:00
bde
73b1dab77a Fixed some style bugs in the removal of __P(()). The main ones were
not removing tabs before "__P((", and not outdenting continuation lines
to preserve non-KNF lining up of code with parentheses.  Switch to KNF
formatting and/or rewrap the whole prototype in some cases.
2002-03-23 15:09:35 +00:00
bde
7a023186fd Fixed some style bugs in the removal of __P(()). The main ones were
not removing tabs before "__P((", and not outdenting continuation lines
to preserve non-KNF lining up of code with parentheses.  Switch to KNF
formatting and/or rewrap the whole prototype in some cases.
2002-03-23 14:27:06 +00:00
takawata
cfea68cc25 Add bios area range check (lower side). 2002-03-23 06:44:04 +00:00
obrien
4c2f517045 ASM versions of __FBSDID. 2002-03-23 02:01:27 +00:00
alc
f100869497 o Use the MI vm_map_growstack() instead of grow_stack() in trap_pfault()
and trapwrite().
 o On i386/pc98, remove the (now) unused grow_stack().
2002-03-21 19:27:15 +00:00
imp
a85d713abc Fix abuses of cpu_critical_{enter,exit} by converting to
intr_{disable,restore} as well as providing an implemenation of
intr_{disable,restore}.

Reviewed by: jake, rwatson, jhb
2002-03-21 06:19:08 +00:00
jeff
9044e91f79 Remove references to vm_zone.h and switch over to the new uma API. 2002-03-21 00:48:25 +00:00
jhb
715dfdbcbe Change the way we ensure td_ucred is NULL if DIAGNOSTIC is defined.
Instead of caching the ucred reference, just go ahead and eat the
decerement and increment of the refcount.  Now that Giant is pushed down
into crfree(), we no longer have to get Giant in the common case.  In the
case when we are actually free'ing the ucred, we would normally free it on
the next kernel entry, so the cost there is not new, just in a different
place.  This also removse td_cache_ucred from struct thread.  This is
still only done #ifdef DIAGNOSTIC.

Tested on:	i386, alpha
2002-03-20 21:09:09 +00:00
imp
5281a9d636 Fix minor style(9) violation in de__Ping 2002-03-20 19:04:56 +00:00
alfred
e7a78af097 Remove __P. 2002-03-20 08:56:31 +00:00
alfred
728484a745 Remove __P. 2002-03-20 07:51:46 +00:00
alfred
61bf661405 Remove __P. 2002-03-20 05:48:58 +00:00
jeff
2923687da3 This is the first part of the new kernel memory allocator. This replaces
malloc(9) and vm_zone with a slab like allocator.

Reviewed by:	arch@
2002-03-19 09:11:49 +00:00
alc
3a80708465 Add #include so that the previous change compiles. 2002-03-19 06:45:25 +00:00
alfred
678a5827b0 fix perfmon for DEVFS.
PR: kern/36008
2002-03-19 06:14:34 +00:00
alc
536541a69d Eliminate unnecessary calls to grow_stack() and useracc() from linux_sendsig()
and linux_rt_sendsig().  (See i386/i386/machdep.c revisions 1.503 and 1.504.)
2002-03-19 04:54:30 +00:00
joe
0f7e6dda9f Add a USB comm driver.
Ported from NetBSD by:	akiyama
2002-03-18 18:23:42 +00:00
alc
2cfa65bbe4 Eliminate grow_stack() from (o)sendsig(). If the stack needs to grow,
copyout() will page fault and perform grow_stack() from trap_pfault().
These calls to grow_stack() accomplish nothing.

Reviewed by:	bde
2002-03-18 07:59:57 +00:00
des
dd05d2f53e s/options\t\t/options \t/ 2002-03-17 23:48:24 +00:00
cjc
67f64647a5 Spelling: s/guesst/guessed/ 2002-03-17 22:02:05 +00:00
hm
3e7af4a966 Clean up the i4b kernel part: remove unmaintained #if(def)s for NetBSD,
OpenBSD and BSD/OS and respective code, remove pre $FreeBSD CVS id's,
remove #if(def)s and respective code for FreeBSD versions < 5 .
2002-03-17 09:33:15 +00:00
alc
db7d969dd7 o Stop calling useracc() in (o)sendsig() now that we use copyout()
to copy the sigframe to the user's stack.  Useracc() takes a non-trivial
   amount of time.  Eliminating it speeds up signal delivery by 15% or more.
 o Update some comments.

Submitted by:	bde
2002-03-17 04:21:19 +00:00
imp
bc38cccf35 Don't call the bios if the interrupt appaers to be already routed. Some
older PCI BIOSes hate this and this leads to panics when it is done.  Also,
assume that a uniquely routed interrupt is already routed.  This also
seems to help some older laptops with feable BIOSes cope.
2002-03-16 23:02:41 +00:00
des
a032109782 Move the definition of PT_[GS]ET{,DB,FP}REGS from the MD ptrace.h to the
MI ptrace.h, since all platforms define them.  Keep the MD ptrace.h around
for FIX_SSTEP (which is currently only needed on Alpha).
2002-03-16 00:25:53 +00:00
alfred
2c16fbdd2a Fixes to make select/poll mpsafe.
Problem:
  selwakeup required calling pfind which would cause lock order
  reversals with the allproc_lock and the per-process filedesc lock.
Solution:
  Instead of recording the pid of the select()'ing process into the
  selinfo structure, actually record a pointer to the thread.  To
  avoid dereferencing a bad address all the selinfo structures that
  are in use by a thread are kept in a list hung off the thread
  (protected by sellock).  When a selwakeup occurs the selinfo is
  removed from that threads list, it is also removed on the way out
  of select or poll where the thread will traverse its list removing
  all the selinfos from its own list.

Problem:
  Previously the PROC_LOCK was used to provide the mutual exclusion
  needed to ensure proper locking, this couldn't work because there
  was a single condvar used for select and poll and condvars can
  only be used with a single mutex.
Solution:
  Introduce a global mutex 'sellock' which is used to provide mutual
  exclusion when recording events to wait on as well as performing
  notification when an event occurs.

Interesting note:
  schedlock is required to manipulate the per-thread TDF_SELECT
  flag, however if given its own field it would not need schedlock,
  also because TDF_SELECT is only manipulated under sellock one
  doesn't actually use schedlock for syncronization, only to protect
  against corruption.

Proc locks are no longer used in select/poll.

Portions contributed by: davidc
2002-03-14 01:32:30 +00:00
phk
b32f8d14b1 Add commented out GEOM line to NOTES 2002-03-11 08:27:23 +00:00
luigi
ad77debfc5 Export a (machine dependent) kernel variable bootdev as
machdep.guessed_bootdev, and add code to sysctl to parse its value
and give a (not necessarily correct) name to the device we booted
from (the main motivation for this code is to use the info in the
PicoBSD boot scripts, and the impact on the kernel is minimal).

NOTE: the information available in bootdev is not always reliable,
so you should not trust it too much.  The parsing code is the same
as in boot2.c, and cannot cover all cases -- as it is, it seems to
work fine with floppies and IDE disks recognised by the BIOS. It
_should_ work as well with SCSI disks recognised by the BIOS.
Booting from a CDROM in floppy emulation will return /dev/fd0 (because
this is what the BIOS tells us).
Booting off the network (e.g. with etherboot) leaves bootdev unset so
the value will be printed as "invalid (0xffffffff)".

Finally, this feature might go away at some point, hopefully when we
have a more reliable way to get the same information.

MFC-after: 5 days
2002-03-10 20:08:44 +00:00
alc
50cc1db981 Condition the compilation of trapwrite() on I386_CPU. 2002-03-10 02:11:38 +00:00
mike
b8cc0d1207 o Don't require long long support in bswap64() functions.
o In i386's <machine/endian.h>, macros have some advantages over
  inlines, so change some inlines to macros.
o In i386's <machine/endian.h>, ungarbage collect word_swap_int()
  (previously __uint16_swap_uint32), it has some uses on i386's with
  PDP endianness.

Submitted by:	bde

o Move a comment up in <machine/endian.h> that was accidentially moved
  down a few revisions ago.
o Reenable userland's use of optimized inline-asm versions of
  byteorder(3) functions.
o Fix ordering of prototypes vs. redefinition of byteorder(3)
  functions, so that the non-GCC (libc asm) case has proper
  prototypes.
o Add proper prototypes for byteorder(3) functions in <sys/param.h>.
o Prevent redundant duplicate prototypes by making use of the
  _BYTEORDER_PROTOTYPED define.
o Move the bswap16(), bswap32(), bswap64() C functions into MD space
  for platforms in which asm versions don't exist.  This significantly
  reduces the complexity of some things at the cost of duplicate code.

Reviewed by:	bde
2002-03-09 21:02:16 +00:00
hm
15b1f704b5 after joerg's recent merge of i4b's sppp with the main sppp, remove
now obsolete file.
2002-03-09 13:31:56 +00:00