Commit Graph

2197 Commits

Author SHA1 Message Date
Bruce Evans
9fe425981b Fixed bitrot in a comment. Fixed some style bugs. 1999-01-01 14:41:51 +00:00
Peter Wemm
a13ddfb633 When loading something that has undefined symbols, it would be helpful to
know what they were..
1998-12-31 09:17:20 +00:00
Doug Rabson
9c0fed3dcf Various changes to support OSF1 emulation:
* Move the user stack from VM_MAXUSER_ADDRESS to a place below the 32bit
  boundary (needed to support 32bit OSF programs).  This should also save
  one pagetable per process.
* Add cvtqlsv to the set of instructions handled by the floating point
  software completion code.
* Disable all floating point exceptions by default.
* A minor change to execve to allow the OSF1 image activator to support
  dynamic loading.
1998-12-30 10:38:59 +00:00
Mike Smith
9959b1a882 Improved DDB_UNATTENDED behaviour. From the submitter:
There's something that's been bugging me for a while, so I decided to fix it.
FreeBSD now will DTRT WRT DDB and DDB_UNATTENDED (!debugger_on_panic), at least
in my opinion. The behavior change is such that:

	1. Nothing changes when debugger_on_panic != 0.
	2. When DDB_UNATTENDED (!debugger_on_panic), if a panic occurs, the
		machine will reboot. Also, if a trap occurs, the machine will
		panic and reboot, unlike how it broke to DDB before. HOWEVER,
		a trap inside DDB will not cause a panic, allowing full use
		of DDB without having to worry about the machine being stuck
		at a DDB prompt if something goes wrong during the day.
		Patches for this behavior follow my signature, and it would
		be a boon to anyone (like me) who uses DDB_UNATTENDED, but
		actually wants the machine to panic on a trap (otherwise,
		what's the use, if the machine causes a fatal trap rather than
		a true panic, of debugger_on_panic?). The changes cause no
		adverse behavior, but do involve two symbols becoming global

Submitted by:	Brian Feldman <green@unixhelp.org>
1998-12-28 23:03:00 +00:00
Doug Rabson
486bddb033 Fix some 64bit truncation problems which crept into SYSCTL_LONG() with the
last cleanup.  Since the oid_arg2 field of struct sysctl_oid is not wide
enough to hold a long, the SYSCTL_LONG() macro has been modified to only
support exporting long variables by pointer instead of by value.

Reviewed by: bde
1998-12-27 18:03:29 +00:00
Doug Rabson
dae6345236 Tweak ptrace(PT_READ_U) so that the last alpha register can be read. 1998-12-26 17:14:37 +00:00
Bruce Evans
4d94881342 Restored rev.1.31 which was clobbered by rev.1.69 (the big Lite2
merge).  This fixes at least hanging in revoke(2) when a somewhat
active slave pty is revoked.  The hang made the window for the
null pointer bug in ufsspec_{read,write} much larger.

There are many other bugs in this area (revoke of an active fifo
at best leaks memory...).
1998-12-24 12:07:16 +00:00
Matthew Dillon
e6ee8e16e0 Adjust some comments to prevent future confusion on the implementation.
Also add a reference to the buf(9) manual page.
1998-12-22 18:57:30 +00:00
Luoqi Chen
1a551e9808 Correctly handle misaligned VMIO buffer (whose start or end offset in the VM
object are not page aligned). This should fix the mount_msdos panic after a
failed attemp to mount as ffs.

Reviewed By:	Matthew Dillon	<dillon@apollo.backplane.com>
		Archie Cobbs	<archie@whistle.com>
		Dmitrij Tejblum <dima@tejblum.dnttm.rssi.ru>
1998-12-22 14:43:58 +00:00
Eivind Eklund
29c98cd8bf Check return value of tsleep(). I've checked of all call points -
there does not seem to be a problem with this.

PR:		kern/8732
Analysis by:	David G Andersen <danderse@cs.utah.edu>
Tested by:	Alfred Perlstein <bright@hotjobs.com>
1998-12-22 00:44:11 +00:00
Eivind Eklund
db878ba480 Staticize. 1998-12-21 23:38:33 +00:00
Matthew Dillon
a1d6c3ec87 Add asleep() and await() support. Currently highly experimental. A
small support structure had to be added to the proc structure, and
    a few minor conditional panics no longer apply.
1998-12-21 07:41:51 +00:00
Julian Elischer
39fb8e6b3e Fix two bogons created by 'patch(1)' in my last commit. 1998-12-19 08:23:31 +00:00
Julian Elischer
6626c6045c Reviewed by: Luoqi Chen, Jordan Hubbard
Submitted by:	 "Richard Seaman, Jr." <lists@tar.com>
Obtained from:	linux :-)

Code to allow Linux Threads to run under FreeBSD.

By default not enabled
This code is dependent on the conditional
COMPAT_LINUX_THREADS (suggested by Garret)
This is not yet a 'real' option but will be within some number of hours.
1998-12-19 02:55:34 +00:00
Bruce Evans
4c56fcdead Removed the cast to a pointer in the definition of PS_STRINGS and
adjusted related casts to match (only in the kernel in this commit).
The pointer was only wanted in one place in kern_exec.c.  Applications
should use the kern.ps_strings sysctl instead of PS_STRINGS, so they
shouldn't notice this change.
1998-12-16 16:28:58 +00:00
Bruce Evans
2caecceeb5 Removed all traces of SYSCTL_INTPTR(). Pointers can't really be passed
across the kernel -> application interface, and for the one sysctl where
they were passed and actually used (kern.ps_strings), the applications
want addresses represented as u_longs anyway (the other sysctl that
passed them, kern.usrstack, has never been used).

Agreed to by:	dfr, phk
1998-12-16 16:06:29 +00:00
Bruce Evans
4f2129fa86 Removed bogus casts of USRSTACK and/or the other operand in binary
expressions involving USRSTACK.
1998-12-16 15:21:51 +00:00
Dag-Erling Smørgrav
e3b3ba2d79 Wrap two macros into do { ... } while (0), and fix the way they're used
in the kernel.

Reviewed by: bde
1998-12-15 17:38:33 +00:00
Matthew Dillon
fe523aa107 fix intermediate overflow in 'quad = int * int' situation by casting
the arguments to the multiply to a quad equivalent.  In this case,
    vm_ooffset_t.

Reviewed by:	Archie Cobbs <archie@whistle.com>
1998-12-14 21:17:37 +00:00
Matthew Dillon
3ea57f9da2 Fixed problems with kernel config file overrides of sysv semaphore
parameters.  Prior to this fix a kernel config override would effect
only some of the kernel files, resulting in panics.

PR:	kern/9068
1998-12-14 08:34:55 +00:00
Matthew Dillon
f7bb75c92a Fix -Wuninitialized warning regarding zero-length var-args ctl element.
( this isn't really an error, but I think it is important to fix the
    warning ).
1998-12-14 05:37:37 +00:00
Don Lewis
2b648ac0a1 Add a generic flag, CTLFLAG_SECURE, which can be used to mark a sysctl
variable unwriteable when securelevel > 0.
Reviewed by: jdp, eivind
1998-12-13 07:19:13 +00:00
Don Lewis
65de0c7a93 getpgid() and getsid() were doing a comparision rather than an assignment,
which is fortunate, because otherwise another bug would allow them to be
used to stomp on the syscall return value of another process.
1998-12-13 07:07:51 +00:00
Matthew Dillon
4c01697599 PR: kern/8965
Obtained from: Stephen Clawson <sclawson@cs.utah.edu>

    Wakeup anyone waiting on a mount point prior to returning from umount,
    whether an error occurs or not.  Fixes a stat/NFS-umount race and other
    potential future problems.  Fix taken from bug/pr which also indicated
    that the same fix has already been applied to OpenBSD and NetBSD.
1998-12-12 21:07:09 +00:00
Nick Hibma
b3f65f42c0 When no driver was found for a device, the message 'not probed' appeared
This is odd, especially in the case of USB where the driver is found
in several tries: vendor specific, class specific, interface specific.
The mouse driver is found at the interface specific level...
Reviewed by:	Doug Rabson (dfr@freebsd.org)
1998-12-12 11:30:04 +00:00
Eivind Eklund
2ae353f9a7 Rename one of the two devfs_link's to devfs_makelink. 1998-12-10 19:57:01 +00:00
Jordan K. Hubbard
337c96916f poll(2) sets POLLNVAL for descriptors passed in that are less than
0.  This makes it difficult to do efficient manipulation of the
struct pollfd since you can't leave a slot empty.

PR:		8599
Submitted-by:	Marc Slemko <marcs@znep.com>
1998-12-10 01:53:26 +00:00
Robert V. Baron
efb73e5aca In ktrwrite, use uio_procp = curproc vs 0 1998-12-10 01:47:41 +00:00
Eivind Eklund
d51523c6c9 Get rid of CTLTYPE_OPAQUE in a SYSCTL_OPAQUE - it is added my the
SYSCTL_OPAQUE macro.
1998-12-09 02:26:45 +00:00
Bruce Evans
e1501bb6eb Backed out the FIOASYNC fix in rev.1.108. fcntl(fd, F_SETFL, flags)
depends on the bug.  It does an FIOASYNC ioctl to sync the setting
of the O_ASYNC "file" flag with drivers even if the setting hasn't
changed.

PR:		9003
1998-12-08 10:22:07 +00:00
Archie Cobbs
f1d19042b0 The "easy" fixes for compiling the kernel -Wunused: remove unreferenced static
and local variables, goto labels, and functions declared but not defined.
1998-12-07 21:58:50 +00:00
Eivind Eklund
4979978b8d Fix grouping of statements. This remove a potential panic in the soft
updates code.  While I'm here, remove an unintended trigraph.

Reviewed by:	Kirk McKusick <kirk@freebsd.org>
1998-12-07 17:23:45 +00:00
Andrey A. Chernov
8e3c23be56 Move stime declaration to main block, otherwise can left uninitialized
in rare cases.
Found by: Eivind Eklund <eivind@yes.no>
1998-12-07 07:59:20 +00:00
Archie Cobbs
2326715f79 Avoid compiler warning (printf arg type mismatch) when compiling #ifdef DEBUG 1998-12-06 00:03:30 +00:00
Kirk McKusick
fcdfed00d5 Even the most recently allocated buffer may not have its b_blkno
field properly filled in, so we must do a VOP_BMAP on that buffer
as well if it is not resolved.
Submitted by: Luoqi Chen <luoqi@watermarkgroup.com>
1998-12-05 06:12:14 +00:00
Archie Cobbs
2127f26023 Examine all occurrences of sprintf(), strcat(), and str[n]cpy()
for possible buffer overflow problems. Replaced most sprintf()'s
with snprintf(); for others cases, added terminating NUL bytes where
appropriate, replaced constants like "16" with sizeof(), etc.

These changes include several bug fixes, but most changes are for
maintainability's sake. Any instance where it wasn't "immediately
obvious" that a buffer overflow could not occur was made safer.

Reviewed by:	Bruce Evans <bde@zeta.org.au>
Reviewed by:	Matthew Dillon <dillon@apollo.backplane.com>
Reviewed by:	Mike Spengler <mks@networkcs.com>
1998-12-04 22:54:57 +00:00
David Greenman
911e8dbc2a Fixed broken code in sendfile(2) when using file offsets. 1998-12-03 12:35:47 +00:00
Archie Cobbs
8245f3f5b4 Add snprintf(3) and vsnprintf(3) capability to the kernel.
Reviewed by:	bde
1998-12-03 04:45:57 +00:00
KATO Takenori
9ad861edee - For some old Cyrix CPUs, %cr2 is clobbered by interrupts. This
problem is worked around by using an interrupt gate for the page
   fault handler.  This code was originally made for NetBSD/pc98 by
   Naofumi Honda <honda@kururu.math.sci.hokudai.ac.jp> and has already
   been in PC98 tree.  Because of this bug, trap_fatal cannot show
   correct page fault address if %cr2 is obtained in this function.
   Therefore, trap_fatal uses the value from trap() function.
-  The trap handler always enables interruption when buggy application
   or kernel code has disabled interrupts and then trapped.  This code
   was prepared by Bruce Evans <bde@FreeBSD.org>.

Submitted by:	Bruce Evans <bde@FreeBSD.org>
		Naofumi Honda <honda@kururu.math.sci.hokudai.ac.jp>
1998-12-02 08:15:17 +00:00
Eivind Eklund
0bfe299097 Check return value of malloc() in expand_name.
Reviewed by:	sef
1998-12-02 01:53:48 +00:00
Poul-Henning Kamp
510eb5b9db Make the previous behaviour the default, add a sysctl which you
can set if your hw/sw produces the "calcru negative..." message.

Setting the alternate method (sysctl -w kern.timecounter.method=1)
makes the the get{nano|micro}*() functions call the real thing at
resulting in a measurable but minor overhead.

I decided to NOT have the "calcru" change the method automatically
because you should be aware of this problem if you have it.

The problems currently seen, related to usleep and a few other corners
are fixed for both methods.
1998-11-29 20:31:02 +00:00
David Greenman
f2b678d4cb Compare p_cpulimit with RLIM_INFINITY before comparing it with the process
runtime. p_runtime is unsigned while p_cpulimit is not, so this avoids the
nasty side effect of the process getting killed when the runtime comes up
"negative" due to other bugs.
1998-11-27 11:44:22 +00:00
Tor Egge
18830dba83 Don't forget to update the pmap associated with aio daemons when adding
new page directory entries for a growing kernel virtual address space.
1998-11-27 01:14:21 +00:00
Tor Egge
f0ac792bec Attempt to handle interrupts delivered to all IO APICs by using the first
IO APIC with a sufficient number of pins.
1998-11-26 23:14:23 +00:00
Eivind Eklund
9fcdafaefc Staticize. 1998-11-26 18:50:24 +00:00
Bruce Evans
e7414d1bfa Fixed the previous fix - stathz doesn't give the statclock frequency
when it is 0.

Submitted by:	mostly by Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp>
1998-11-26 16:49:55 +00:00
Bruce Evans
44f05f9c92 Oops, yet again back out some local changes that shouldn't have been
in the previous commit.
1998-11-26 14:05:58 +00:00
Bruce Evans
e4d0e37b33 Fixed scaling of p_pctcpu. It was wrong by a factor of stathz/hz.
Until recently, this was half compensated for in at least ps and top
by multiplying by 100/stathz to get a better wrong factor of 100/hz.
1998-11-26 14:00:08 +00:00
Poul-Henning Kamp
c2906d55d0 Make timecounters more resistant to badly behaved SW/HW which locks
out interrupts for too long.  If you still see the "calcru: negative
time..." message you can increase NTIMECOUNTER (see LINT).

Sideeffect is that a timecounter is required to not wrap around in
less than (1 + delta) seconds instead of the (1/hz + delta) required
until now.

Many thanks to: msmith, wpaul, wosch & bde
1998-11-23 09:59:02 +00:00
Søren Schmidt
8843cc3508 Add a kludge to prevent panicing when using VM86 and hitting here
with a NULL curproc.

Originally by: Tor Egge (IIRC)
1998-11-23 09:34:19 +00:00
Bruce Evans
f6233520ce Fixed a missing include. `SYSININT(...);' garbage in gave null garbage out. 1998-11-23 09:33:35 +00:00
Don Lewis
9d2b090975 We can't call fsetown() from sonewconn() because sonewconn() is be called
from an interrupt context and fsetown() wants to peek at curproc, call
malloc(..., M_WAITOK), and fiddle with various unprotected data structures.
The fix is to move the code that duplicates the F_SETOWN/FIOSETOWN state
of the original socket to the new socket from sonewconn() to accept1(),
since accept1() runs in the correct context.  Deferring this until the
process calls accept() is harmless since the process can't do anything
useful with SIGIO on the new socket until it has the descriptor for that
socket.

One could make the case for not bothering to duplicate the
F_SETOWN/FIOSETOWN state and requiring the process to explicitly make the
fcntl() or ioctl() call on the new socket, but this would be incompatible
with the previous implementation and might break programs which rely on
the old semantics.

This bug was discovered by Andrew Gallatin <gallatin@cs.duke.edu>.
1998-11-23 00:45:39 +00:00
Bruce Evans
7dd89537f1 Fixed some missing cases in the check for ioctls that involve modification.
Many (mostly machine-dependent ones) are still missing.  NIST-PCTS found
this bug for all the ioctls used to implement the POSIX tc* functions
(TIOCCBRK, TIOCDRAIN, TIOCSPGRP, TIOCSBRK, TIOCSTART and TIOCSTOP), and
I found FIOASYNC, TIOCCONS, TIOCEXCL, TIOCHPCL, TIOCNXCL, TIOCSCTTY and
TIOCSDRAINWAIT by inspection.  TIOCSPGRP was ifdefed out for some reason.

Handle tcsetattr()'s historical speed conversions correctly and more
centrally:
- don't store speeds of 0 in the final termios struct.  Drivers can now
  depend on tp->t_ispeed and tp->t_ospeed giving the actual speed.
  Applications can now depend on tcgetattr() being POSIX.1 conformant.
- convert from a proposed input speed of 0 to the proposed output speed
  (except if that is 0, convert to the current output speed).  Drivers
  can now depend on the proposed input speed being nonzero.
- don't reject negative speeds.  Negative speeds can't happen now that
  speed_t is unsigned, and rejecting invalid speeds is a bug - tcsetattr()
  is supposed to succeed if it can "perform any of the requested actions",
  so it shouldn't fail in practice.
1998-11-22 09:04:09 +00:00
David Greenman
4f699173cb Closed a very narrow and rare race condition that involved net interrupts,
bio interrupts, and a truncated file that along with the precise alignment
of the planets could result in a page being freed multiple times or a
just-freed page being put onto the inactive queue.
1998-11-18 09:00:47 +00:00
Kirk McKusick
96334b8fc8 Because buffers may be tossed and recreated at will under the new VM
system, the mapping from logical to physical block number may be lost.
Hence we have to check for a reconstituted buffer and redo the call to
VOP_BMAP if the physical block number has been lost.
1998-11-17 00:31:12 +00:00
Kenneth D. Merry
d9e371b995 Now that the wd driver is fixed (Thanks Bruce!), re-enable the
devstat_end_transaction error message that gets printed whenever the
busy count is < 0.

This will help catch drivers that improperly implement devstat(9) support.
1998-11-15 23:57:22 +00:00
Doug Rabson
921433915d A couple of minor sanity checks.
Submitted by: Nick Hibma <nick.hibma@jrc.it>
1998-11-15 18:11:21 +00:00
David Greenman
efac52b4ab In sendfile(2), check against sb_lowat when filling the socket buffer,
rather than 0.
1998-11-15 16:55:09 +00:00
Bruce Evans
4ae860afde Fixed the type of vfs_modevent (a little late, to match the corresponding
change in sys/mount.h).
1998-11-15 15:18:30 +00:00
Bruce Evans
14fddaf97a Fixed a missing include. <sys/kernel.h> is needed by the new
MALLOC_DEFINE() and MALLOC_DEFINE() is needed by the recently
reenabled "reallocblks" code, but <sys/kernel.h> was only included
if CLUSTERDEBUG was defined.  This was too harmless.  gcc only
warns about garbage like `SYSINIT(blech);' at file scope ...
1998-11-15 14:11:06 +00:00
David Greenman
f2efb8e4c8 Fixed a couple of nits in sendfile(2): clear PG_ZERO before unbusying
the page, and use passed-in "p" rather than curproc in uio struct.
1998-11-14 23:36:17 +00:00
Garrett Wollman
14177d72cd My changes to the new device interface:
- Interface wth the new resource manager.
	- Allow for multiple drivers implementing a single devclass.
	- Remove ordering dependencies between header files.
	- Style cleanup.
	- Add DEVICE_SUSPEND and DEVICE_RESUME methods.
	- Move to a single-phase interrupt setup scheme.

Kernel builds on the Alpha are brken until Doug gets a chance to incorporate
these changes on that side.

Agreed to in principle by: dfr
1998-11-14 21:58:51 +00:00
Mike Smith
d02d6d040a Don't count non-local dirty buffers as outstanding when shutting down.
This avoids the fsck-on-reboot symptoms if you're shutting down with a
hung or unreachable NFS server mounted.  Also remove non-local
filesystems from the mount list to prevent the system hanging when it tries
to unmount them (for the same reason).

Drew points out that there's a good argument for forcibly removing all
"non syncable" filesystems from the mount list (eg. NFS mounts, disks
that aren't responding, etc.) as this then allows you to sync and
cleanly unmount their parents.  No such change is included in this
patch.

Submitted by:	Andrew Gallatin <gallatin@cs.duke.edu>
1998-11-13 22:40:37 +00:00
Doug Rabson
92c6ae04da A couple of fixes to device_delete_child() to delete all children of
the device and to free the device which is being deleted (not its
parent - oops).

Submitted by: Nick Hibma <nick.hibma@jrc.it>
1998-11-13 09:39:37 +00:00
David Greenman
1c680b45a2 Restored the "reallocblks" code to its former glory. What this does is
basically do a on-the-fly defragmentation of the FFS filesystem, changing
file block allocations to make them contiguous. Thanks to Kirk McKusick
for providing hints on what needed to be done to get this working.
1998-11-13 01:01:44 +00:00
Peter Wemm
ba031106b1 kldsym(2) prototype implementation 1998-11-11 13:04:40 +00:00
Peter Wemm
de8a10f07a regenerate (+kldsym) 1998-11-11 12:57:05 +00:00
Peter Wemm
325e13dd19 A kldsym(2) syscall prototype for extracting information from the in-kernel
linker.  This is intended to replace kvm_mkdb etc.  The first version
only does name->value lookups, but it's open ended.  value->name lookups
would probably be a good thing to do too.

It's been suggested to try and connect the symbol tables to sysctl (which
is probably a more flexible way of doing it if it's done right), but that
is far more complex and difficult than I was ready to have a shot at.
1998-11-11 12:45:14 +00:00
Don Lewis
62d6ce3af2 I got another batch of suggestions for cosmetic changes from bde. 1998-11-11 10:56:07 +00:00
Don Lewis
831d27a9f5 Installed the second patch attached to kern/7899 with some changes suggested
by bde, a few other tweaks to get the patch to apply cleanly again and
some improvements to the comments.

This change closes some fairly minor security holes associated with
F_SETOWN, fixes a few bugs, and removes some limitations that F_SETOWN
had on tty devices.  For more details, see the description on the PR.

Because this patch increases the size of the proc and pgrp structures,
it is necessary to re-install the includes and recompile libkvm,
the vinum lkm, fstat, gcore, gdb, ipfilter, ps, top, and w.

PR:		kern/7899
Reviewed by:	bde, elvind
1998-11-11 10:04:13 +00:00
Peter Wemm
1c5bb3eaa1 add #include <sys/kernel.h> where it's needed by MALLOC_DEFINE() 1998-11-10 09:16:29 +00:00
Peter Wemm
c6105dce78 Register and unregister vnodeops the new way rather than leaking on
unload.
1998-11-10 09:12:40 +00:00
Peter Wemm
5ad3d2212f kzipboot uses kern/inflate.c outside the kernel by providing its own
minimal malloc/free implementation.  Stop passing M_GZIP to it.
1998-11-10 09:08:49 +00:00
Peter Wemm
4e61198e8f Make the vnode opv vector construction fully dynamic. Previously we
leaked memory on each unload and were limited to items referenced in
the kernel copy of vnode_if.c.  Now a kernel module is free to create
it's own VOP_FOO() routines and the rest of the system will happily
deal with it, including passthrough layers like union/umap/etc.

Have VFS_SET() call a common vfs_modevent() handler rather than
inline duplicating the common code all over the place.

Have VNODEOP_SET() have the vnodeops removed at unload time (assuming a
module) so that the vop_t ** vector is reclaimed.

Slightly adjust the vop_t ** vectors so that calling slot 0 is a panic
rather than a page fault.  This could happen if VOP_something() was called
without *any* handlers being present anywhere (including in vfs_default.c).
slot 1 becomes the default vector for the vnodeop table.

TODO: reclaim zones on unload (eg: nfs code)
1998-11-10 09:04:09 +00:00
Peter Wemm
edfbe15080 Arrange for unload-time linker set hooks to be called. While cut/pasting
some code, I changed the original to be consistant with the rest of the
file rather than duplicating the problems.
1998-11-10 08:49:28 +00:00
Peter Wemm
db66937855 Have MALLOC_DECLARE() initialize malloc types explicitly, and have them
removed at module unload (if in a module of course).
However; this introduces a new dependency on <sys/kernel.h> for things
that use MALLOC_DECLARE().  Bruce told me it is better to add sys/kernel.h
to the handful of files that need it rather than add an extra include to
sys/malloc.h for kernel compiles. Updates to follow in subsequent commits.
1998-11-10 08:46:24 +00:00
Don Lewis
643a8daaaf If the session leader dies, s_leader is set to NULL and getsid() may
dereference a NULL pointer, causing a panic.  Instead of following
s_leader to find the session id, store it in the session structure.

Jukka found the following info:

	BTW - I just found what I have been looking for. Std 1003.1
	Part 1: SYSTEM API [C LANGUAGE] section 2.2.2.80 states quite
	explicitly...

	Session lifetime: The period between when a session is created
	and the end of lifetime of all the process groups that remain
	as members of the session.

	So, this quite clearly tells that while there is any single
	process in any process group which is a member of the session,
	the session remains as an independent entity.

Reviewed by:	peter
Submitted by:	"Jukka A. Ukkonen" <jau@jau.tmt.tele.fi>
1998-11-09 15:08:04 +00:00
Nicolas Souchu
31a7daae9e Add semicolon to INTERFACE declaration. 1998-11-08 18:51:38 +00:00
Nicolas Souchu
7a8ecb9e64 Add semicolon to INTERFACE declarations 1998-11-08 18:35:53 +00:00
Nicolas Souchu
1864a32626 "Here is the most recent version of makedevops.pl. I've made the parsing
of the input file more strict and the error messages more elaborate.
Second, the output file has slightly improved looks when >80 character
lines are concerned (I needed a 80 character line formatter anyway for
work...)."

Submitted by: Nick Hibma <nick.hibma@jrc.it>
1998-11-08 18:33:11 +00:00
Doug Rabson
7095ee912b * Fix a couple of places in the device pager where an address was
truncated to 32 bits.
* Change the calling convention of the device mmap entry point to
  pass a vm_offset_t instead of an int for the offset allowing
  devices with a larger memory map than (1<<32) to be supported
  on the alpha (/dev/mem is one such).

These changes are required to allow the X server to mmap the various
I/O regions used for device port and memory access on the alpha.
1998-11-08 12:39:07 +00:00
David Greenman
bd81f199b5 Added support for non-blocking sockets to sendfile(2). 1998-11-06 19:16:30 +00:00
Peter Wemm
caab6e909e Don't put aggregate structs 4K large on the kernel stack, especially when
we can recurse when loading dependencies and that the kstack is limited
to something like 6 or 7KB.  Having a single dependency caused an instant
double panic, and I stronly suspect some of the other strange "events"
that I have seen are possibly as a result of taking a couple of interrupts
with a large chunk of the stack already in use.

While here, fix a minor logic hiccup in a sanity check.
1998-11-06 15:16:07 +00:00
Peter Wemm
21ce23eb91 Define the kld_debug variable if KLD_DEBUG is enabled 1998-11-06 15:10:17 +00:00
Peter Wemm
f9d919e98f put a \n on an error message printf 1998-11-06 02:18:57 +00:00
David Greenman
dd0b2081f4 Implemented zero-copy TCP/IP extensions via sendfile(2) - send a
file to a stream socket. sendfile(2) is similar to implementations in
HP-UX, Linux, and other systems, but the API is more extensive and
addresses many of the complaints that the Apache Group and others have
had with those other implementations. Thanks to Marc Slemko of the
Apache Group for helping me work out the best API for this.
Anyway, this has the "net" result of speeding up sends of files over
TCP/IP sockets by about 10X (that is to say, uses 1/10th of the CPU
cycles) when compared to a traditional read/write loop.
1998-11-05 14:28:26 +00:00
Bill Fenner
0931333f8d Fix sbcheck() to check all packets on socket buffer.
Also fix data types and printf formats while I'm here.

PR:	misc/8494

Panic instead of looping forever in sbflush().  If sb_mbcnt counts
more mbufs than sb_cc counts bytes, the original code can turn into an
infinite loop of removing 0 bytes from the socket buffer until it's empty.
1998-11-04 20:22:11 +00:00
Peter Wemm
84e40f5627 The handle for the kernel is common. With this fix, ELF kernels can load
a.out kld modules, and a.out kernels can load ELF kld modules.
1998-11-04 15:20:58 +00:00
Peter Wemm
ee9d248c5f General tidy up: remove more unused code, update comments, simplify some
routines a little.
1998-11-04 03:18:10 +00:00
Peter Wemm
02fc72dbe5 make mount(2) automatically kldload modules if the requested filesystem
isn't present.
1998-11-03 14:29:09 +00:00
Peter Wemm
7837745438 Have the in-kernel linker try a default extension of .ko. This means that
"kldload nfs" works.  We use the same default extension in the /boot/loader
system.
1998-11-03 14:27:05 +00:00
Peter Wemm
e91a7f30cf Initialize the a.out kld loader after elf, so that elf gets first shot at
a kldload attempt.
1998-11-03 14:25:21 +00:00
Peter Wemm
b913711e0c Use the kvm space pathname that we copied in, not the one in user space. 1998-11-03 13:09:31 +00:00
Peter Wemm
8c14bf40a1 Change the #ifdef UNION code into a callable hook. Arrange to have this
set up when unionfs is present, either statically or as a kld module.
1998-11-03 08:01:48 +00:00
Peter Wemm
f3d6ee090e Only do one VOP_ACCESS() per open() instead of two. This should reduce
the NFSv3 ACCESS RPC problems a little for busy clients that do a lot of
open/close.  The nfs code could probably cache the results, but I'm not
sure whether this would be legal or useful.  The problem is that with
a CPU farm, on each open there would be a lookup, getattr then access RPC
then the read/write RPC activity.  Caching the access results probably
isn't going to help much if the clients access lots of files.  Having the
nfs_access() routine interpret the getattr results is a bit of a hack, but
it's how NFSv2 is done and it might be OK for a mount attribute for v3.
1998-11-02 02:36:16 +00:00
Peter Wemm
40c8cfe552 Use TAILQ macros for clean/dirty block list processing. Set b_xflags
rather than abusing the list next pointer with a magic number.
1998-10-31 15:31:29 +00:00
Peter Wemm
16e9e530cc Convert lists for bufs attached to vnodes from a LIST to a TAILQ.
- Use TAILQ_* macros extensively instead of internal names
- use b_xflags instead of the NOLIST magic number hack in the next pointer
- clean bufs are inserted at the tail rather than the head.
- redo dirty buffer insert so that metadata (negative lbn) goes to the
  tail directly rather than at the HEAD.  This makes a difference when
  inserting dirty data blocks in lbn sorted order since data block
  insertion will not have to bypass all the metadata cruft.  data is
  lbn sorted since it makes sense for clustering and writeback ordering,
  while metadata sorting doesn't help much since the lbn's are
  meaningless when walking the list for writebacks.

Small systems will not notice much (if any) benefit from this, but really
busy systems with large dirty block lists should get a lot more.

I've tested this with softdep, and it doesn't seem to mind the change of
queueing of metadata.

Reviewed (in princible) by: dg
Obtained from: partly from John Dyson's work-in-progress patches in June.
1998-10-31 14:20:39 +00:00
Peter Wemm
b421db370b The last argument to vm_object_page_clean() are now bit flags, rather than
the old true/false.

While here, have vfs_msync() only call vm_object_page_clean() with
OBJPC_SYNC if called with MNT_WAIT flags.  vfs_msync() is called at unmount
time (with MNT_WAIT) and from the syncer process (formerly update).
This should make dirty mmap writebacks a little less nasty.

I have tested this a little with SOFTUPDATES enabled, but I don't normally
use it since I've been badly burned too many times.
1998-10-31 07:42:04 +00:00
David Greenman
2a78b8d1f8 Unwire everything to the inactive queue in order to preserve LRU ordering. 1998-10-30 14:53:54 +00:00
Mike Smith
35d27a0f39 Add the ability to specify where on the at_shutdown queue a handler is
installed.

Remove cpu_power_down, and replace it with an entry at the end of the
SHUTDOWN_FINAL queue in the only place it's used (APM).

Submitted by:	Some ideas from Bruce Walter <walter@fortean.com>
1998-10-30 05:41:15 +00:00
Bruce Evans
cbbbd4c330 Oops, rev.1.167 made the device number checking in bdevvp() too strict
for mfs root mounts.  Don't require major 255 to be in bdevsw[].
1998-10-29 11:50:32 +00:00
David Greenman
0d5a725446 Fixed editing error. Pointed out by bde. 1998-10-29 11:04:22 +00:00
Peter Wemm
20f02ef5e9 Remove the V_SAVEMETA flag, nothing uses it any more now that msdosfs and
ext2fs call vtruncbuf() directly.  This simplifies and cleans up
vinvalbuf() a little.
1998-10-29 09:51:28 +00:00
Garrett Wollman
a64d49d14f A Perl5 version of makedevops.sh. Fixes a bug in the sh/awk version
which really annoyed me at the time but I don't think bites me any
more.
1998-10-29 01:52:59 +00:00
Garrett Wollman
af2a5c769a The new resource manager, hopefully in a reasonably stable form. 1998-10-29 01:48:36 +00:00
David Greenman
730075613a Added a second argument, "activate" to the vm_page_unwire() call so that
the caller can select either inactive or active queue to put the page on.
1998-10-28 13:37:02 +00:00
Doug Rabson
45a576b57a Lots of debugging code and some bugfixes.
Submitted by: Nick Hibma <nick.hibma@jrc.it>
1998-10-27 09:21:43 +00:00
Bruce Evans
885bf0b57a Updated the major number check in vfs_object_create(). It's not
clear if the check is necessary, but vfs_object_create() is called
for all vnodes and it was silly to create objects for VBLK vnodes
that don't even have a driver.
1998-10-26 08:07:00 +00:00
Bruce Evans
fffd686a31 Fixed breakage of the GPROF case of statclock() in the previous commit. 1998-10-26 06:13:18 +00:00
Bruce Evans
b64f28be2d Oops, back out some local changes that shouldn't have been in the
previous commit.
1998-10-25 20:11:36 +00:00
Bruce Evans
c8a1bed2ab Fixed breakage of the !SMP case of roundrobin() in the previous commit. 1998-10-25 19:57:23 +00:00
Poul-Henning Kamp
f5ef029e92 Nitpicking and dusting performed on a train. Removes trivial warnings
about unused variables, labels and other lint.
1998-10-25 17:44:59 +00:00
Bruce Evans
37906c686d Fixed device number checking in bdevvp():
- dev != NODEV was checked for, but 0 was returned on failure.  This was
  fixed in Lite2 (except the return code was still slightly wrong (ENODEV
  instead of ENXIO)) but the changes were not merged.  This case probably
  doesn't actually occur under FreeBSD.
- major(dev) was not checked to have a valid non-NULL bdevsw entry.  This
  caused panics when the driver for the root device didn't exist.

Fixed minor misformattings in bdevvp().  Rev.1.14 consisted mainly of
gratuitous reformattings that seem to have caused many Lite2 merge
errors.

PR:			8417
1998-10-25 16:11:49 +00:00
Bruce Evans
a6cda5b68f Fixed sysctl attachment for statically configured vfs's.
Broken in:		previous commit
1998-10-25 10:52:34 +00:00
Mike Smith
6fe8861e01 Don't put 0x in front of %p, it does it already.
Submitted by:	 Brian Feldman <green@janus.syracuse.net>
1998-10-24 18:35:09 +00:00
Poul-Henning Kamp
3bac064ff7 Change the way we simulate stable storage for timecounters.
If you have problems with the "calcru" messages and processes being
killed for excessive cpu time, try to increase the NTIMECOUNTER
#define and report your findings.
1998-10-23 10:44:52 +00:00
John Polstra
2c2a0cf191 Eliminate a superfluous comment. 1998-10-21 16:31:38 +00:00
Peter Wemm
52c24af701 Some cleanups and optimizations:
- Use the system headers method for Elf32/Elf64 symbol compatability
- get rid of the UPRINTF debugging.
- check the ELF header for compatability much more completely
- optimize the section mapper.  Use the same direct VM interfaces that
  imgact_aout.c and kern_exec.c use.
- Check the return codes from the vm_* functions better.  Some return
  KERN_* results, not an errno.
- prefault the page tables to reduce startup faults on page tables like
  a.out does.
- reset the segment protection to zero for each loop, otherwise each
  segment could get progressively more privs. (eg: if the first was
  read/write/execute, and the second was meant to be read/execute, the
  bug would make the second r/w/x too.  In practice this was not a
  problem because executables are normally laid out with text first.)
- Don't impose arbitary limits.  Use the limits on headers imposed by
  the need to fit them into one page.
- Remove unused switch() cases now that the verbose debugging is gone.

I've been using an earlier version of this for a month or so.
This sped up ELF exec speed a bit for me but I found it hard to get
consistant benchmarks when I tested it last (a few weeks ago).
I'm still bothered by the page read out of order caused by the
transition from data to bss. This which requires either part filling the
transition page or clearing the remainder.
1998-10-18 15:55:12 +00:00
Bruce Evans
95242f5a02 Overload the correct errno for attempts to set an in-core label with
a raw partition at a nonzero offset (EINVAL should have been EXDEV;
DIOCSDINFO was broken, and DIOCWDINFO was broken because it depended
on DIOCSDINFO).

A zero offset for the raw partition should probably be enforced in
setdisklabel(), and DIOCWDINFO should probably always be handled by
first calling setdisklabel() so that writedisklabel() doesn't need to
enforce it, but this has never been done; dsioctl() has a special
check.  Changes in this commit are limited to dsioctl() to preserve
bug for bug compatibility in drivers that don't use the slice code
(notably the ccd driver, which allows setting a bogus label in
DIOCWDINFO and doesn't undo the setting when writedisklabel() fails).
1998-10-17 09:46:42 +00:00
Bruce Evans
e36b4f594a Use only the correct raw partition for writing labels. Don't use the
partition that the label ioctl is being done on just because it has
offset 0, since there is no guarantee that such a partition is large
enough to contain the label.  Don't use the wrong raw partition (0
instead of RAW_PART).

This fixes problems rewriting bizarre labels (with a nonzero offset
for the 'a' partition) in newfs(8).  Such labels shouldn't normally
be used, but creating them was allowed if the ioctl was done on the
raw partition, and sysinstall creates them if the root partition isn't
allocated first.

Note that allowing write access to a partition other than the one that
has been checked for write access doesn't increase security holes
significantly, since write access to any partition already allows
changing the in-core label.

This fix should be in 3.0R.  Rev.1.26 of newfs/newfs.c shouldn't be
in 3.0R.
1998-10-17 07:49:04 +00:00
Jordan K. Hubbard
908dcbd2a4 fixup for alpha. 1998-10-16 10:14:21 +00:00
Peter Wemm
aa855a598d *gulp*. Jordan specifically OK'ed this..
This is the bulk of the support for doing kld modules.  Two linker_sets
were replaced by SYSINIT()'s.  VFS's and exec handlers are self registered.
kld is now a superset of lkm.  I have converted most of them, they will
follow as a seperate commit as samples.
This all still works as a static a.out kernel using LKM's.
1998-10-16 03:55:01 +00:00
Peter Wemm
df481e793f Fix some bugs in link_aout.c caused by using uninitialized malloc space.
Pre-Approved by:  jkh
1998-10-16 03:45:35 +00:00
Peter Wemm
434bf653d2 - bzero() after malloc() bug fix
- look up relocation symbol names in correct table bugfix.
- remove unused (initialized to 0) variable and conditional free() of it.
1998-10-15 17:16:24 +00:00
Peter Wemm
bd4e381b03 - bzero() after malloc(). This is especially obvious when kern_malloc is
compiled with DIAGNOSTIC.
- Don't break from the preload module processing loop prematurely.
1998-10-15 17:12:12 +00:00
Peter Wemm
ddd62546e1 Fix sysinit_add().
- Don't include multiple copies of the previous sysinit in the new one.
- Leave space for and explicitly null terminate the new list.
1998-10-15 17:09:19 +00:00
Doug Rabson
216a0f2d7f Don't frob the user stack directly, use suword instead. This fixes the
elf_freebsd_fixup() panic which many people have noticed on the alpha.
1998-10-15 09:52:19 +00:00
Doug Rabson
67fc32a9ff Use the interface name as well as the method name when creating the method
description.

Submitted by: Nick Hibma <nick.hibma@jrc.it>
1998-10-15 09:50:45 +00:00
Kenneth D. Merry
a937ccdc09 Disable the 'devstat_end_transaction' busy count printf until after 3.0
release goes out the door.  We know there's a bug in the devstat
implementation in the wd driver, but bde and msmith haven't been able to
fix it yet.

So, disable the printf to avoid confusing/worrying people.

Suggested by:	msmith
1998-10-14 20:44:05 +00:00
Dmitrij Tejblum
f74d75a2b6 Backed out rev. 1.164. It caused problems on SMP.
PR:		8309
1998-10-14 15:05:52 +00:00
Peter Wemm
2a26e9ea83 Align to sizeof(long) rather than sizeof(int32_t). It needs to be
long because this code is shared with the alpha.  I hope the alpha can
read 32 bit ints at 32 bit alignment (vs. 64 bit alignment).
1998-10-14 05:07:23 +00:00
Peter Wemm
ca65d5c714 Load the full symbol tables if they are present. This means that ddb
and tracebacks have access to local symbols.  This is particularly
important for the Alpha.
1998-10-13 09:27:00 +00:00
David Greenman
6cde7a165f Fixed two potentially serious classes of bugs:
1) The vnode pager wasn't properly tracking the file size due to
   "size" being page rounded in some cases and not in others.
   This sometimes resulted in corrupted files. First noticed by
   Terry Lambert.
   Fixed by changing the "size" pager_alloc parameter to be a 64bit
   byte value (as opposed to a 32bit page index) and changing the
   pagers and their callers to deal with this properly.
2) Fixed a bogus type cast in round_page() and trunc_page() that
   caused some 64bit offsets and sizes to be scrambled. Removing
   the cast required adding casts at a few dozen callers.
   There may be problems with other bogus casts in close-by
   macros. A quick check seemed to indicate that those were okay,
   however.
1998-10-13 08:24:45 +00:00
Dmitrij Tejblum
9bbd8a2498 UnVMIO vnodes of block devices when they are no longer in use. (Some
things, like msdosfs, do not work (panic) on devices with VMIO enabled.
FFS enable VMIO on mounted devices, and nothing previously disabled it, so,
after you mounted FFS floppy, you could not mount msdosfs floppy anymore...)

This is mostly a quick before-release fix.

Reviewed by:	bde
1998-10-12 20:14:09 +00:00
Peter Wemm
2d636ab077 Only print kernel entry point during load.
Drastically quieten down the verbose load progress messages.  They were
more useful for debugging than anything, but are beyond a joke when loading
a few dozen modules.
Simplify the ELF extended symbol table load format.  Just take the main
symbol table and the string table that corresponds.  This is what we will
be getting local symbols from.  (needed for the alpha stack tracebacks).
Use the (optional) full symbol tables in lookups.  This means we have to
furhter distinguish between symbols that can come from the dynamic linking
table and the complete table.
The alpha boot code now needs to be adapted as ddb/db_elf.c cannot use
the simpler format.
I have not implemented loading the extended symbol tables from the syscall
interface yet, just for preloaded modules.
I am not sure about the symbol resolution.  I *think* it's possible that
a local symbol can be found in preference to a global, depending on the
search sequence and dependency tree.
1998-10-12 09:13:50 +00:00
Peter Wemm
2da2eeacee Relocate a few extra addresses that are stored as physical addresses via
the boot loader.
1998-10-12 09:03:48 +00:00
John Polstra
d1dbc69449 If an ELF executable has a recognized brand, then believe it.
Formerly, the heuristic involving the interpreter path took
precedence.

Also, print a better error message if the brand is missing or not
recognized.  If there is no brand at all, give the user a hint that
"brandelf" needs to be run.
1998-10-11 19:22:07 +00:00
KATO Takenori
7344a7bb2e mp_machdep.c: Set a vector to boot code (PC-98).
locore.s: Tell the bios to warmboot next time (PC-98).
1998-10-10 13:37:16 +00:00
KATO Takenori
ed68ba2cd0 PC-98 doesn't have CMOS ram. 1998-10-10 09:38:02 +00:00
Peter Wemm
26deceba9c Display module type as well as module name when we find one preloaded. 1998-10-10 02:29:07 +00:00
Peter Wemm
51f3fe7ab2 Use Mike Smith's linker module search path code.
Implement preloading in a fairly MI way, assuming the information is
prepared.
DDB interface helpers..  Provide some support for db_kld.c so that we
don't have to export too much detail.
Debugging and cosmetic nits left in from development..
The other half of the containing file hack so modules can associate
themselves with their "file".
1998-10-10 00:07:53 +00:00
Peter Wemm
f3b0d44290 Keep track of the containing file for modules. This is a bit of a hack,
but I can't think of another (relatively) easy way of getting the info
since the boot-time initialization is not done immediately after "loading".
XXX module_register() gained an extra arg.  This might break the alpha
compile, if so, just add a zero to get the old behavior.
1998-10-10 00:03:07 +00:00
Peter Wemm
e4f1a52f7a Updates for alignment rounding. XXX this is highly machine dependent and
should probably be moved to i386/i386/link_machdep.c (and the same for the
alpha).
Implement "deleting" a preloaded module by destroying it's tags. This is a
hack.  We cannot reuse the data, it's been destroyed by relocation,
statically initialized variables have been modified, etc.  Note that to
reclaim the load space is going to be more machine-dependent work.
Implement a relocate hook for machdep.c to call so that the physical
addresses get converted to the equivalent KVM addresses.
1998-10-09 23:59:01 +00:00
Peter Wemm
de78ca7e63 Fully implement KLD and preloading.
- seperate unload for preloaded linker objects.
- Don't build a kernel object if running as an a.out kernel.
- extract the real kernel name rather than hardwiring "kernel" for kldstat.
  (sysctl kern.bootfile getst the full name via bootinfo)
- use real addresses on the kernel "module" rather than fictitious ones.
- preloaded module support
- search module path for file modules.
- symbols are checked to see if they are in the right containing file
  before using their indexes into string tables.  This is to help ddb
  since it only supplies a pointer to an opaque symbol and there is no
  telling which file/object/module/whatever it came from.
1998-10-09 23:55:31 +00:00
Peter Wemm
adbb7dbee6 Updates for KLD backends.
- symbol_values checks that the symbol is indeed belonging to the
   correct symbol and string table pairs before looking up. (since there
   could be many pairs, and KLD/DDB need to find out).
 - different ops for files versus preload modules - the unload mechanism
   is different.  (a preloaded module has to be deleted on unload since
   the in-core image is tainted by relocation and variables used)
 - Do not build an a.out kernel module if we're running on an elf
   kernel. :-)  Note that it should theoretically be possible to
   mix a.out and elf KLD modules providing -mno-underscores was used
   to compile it, or some other symbol conversion takes place.
 - Support preload modules (even though /boot/loader doesn't yet)
 - Search the module path when loading files.
1998-10-09 23:49:28 +00:00
Peter Wemm
94e9d7c12d Implement merging SYSINIT's from preloaded KLD modules. This means we
check off SYSINIT entries as they are run, and when more arrive, we re-sort
and restart (skipping the already-run entries).
This can *only* be done after KMEM (and malloc) is up and running - this is
fine because KLD is the only consumer of this and it's done after that.
The nice thing about this is that the SYSINIT's within preloaded KLD modules
are executed in their natural order.  It should be possible to register
devices for the probes which follow, etc.  (soon.. several key things
prevent this, such as use of linker sets for things like pci devices).
1998-10-09 23:42:47 +00:00
Mike Smith
a8dad95401 Don't try to initialise the environment out of a sysinit, it's handled
in MD code instead.
1998-10-09 21:21:34 +00:00
Jordan K. Hubbard
e4f570a215 Fix damaged comment. 1998-10-09 11:03:46 +00:00
Mike Smith
6ba9413b55 Kernel environment access, preloaded module lookup. 1998-10-09 00:31:29 +00:00
KATO Takenori
5baef6cd27 BIOS ROM base address is 0xe8000 on PC-98. 1998-10-08 16:15:22 +00:00