Commit Graph

985 Commits

Author SHA1 Message Date
Mark Murray
0738b16169 random_machdep.c: New version, also includes revectored interrupts, rather
than hooking permanently.
vector.s:       : Remove the interrupt hook. This is done dynamically, now.
1995-12-27 11:22:05 +00:00
Joerg Wunsch
0209e040ba I report a problem about shmget(). (I'm using FreeBSD-2.1.0R)
int shmget(key_t key, int size, int shmflg);

If the 'key' has already existed in the system and set 'shmflg'
as '(IPC_CREAT|IPC_EXC)', then shmget() must return the error 'EEXIST'.

Submitted by:	m_tanaka@pa.yokogawa.co.jp (Mihoko Tanaka)
1995-12-26 16:03:32 +00:00
Bruce Evans
337e9f0bd2 Renamed isa/random.c to isa/random_machdep.c to avoid a conflict with
libkern/random.c.
1995-12-26 12:50:24 +00:00
Bruce Evans
037d027c92 Unstaticized addupc_task(). It is supposed to be called from trap().
See the comments for addupc_intr() and the NetBSD implementation.
We use dummy versions of fuswintr() and susiwintr(), so addupc_intr()
always pushes the work to trap() (this is inefficient), and trap()
calls the special i386 function addupc() instead of addupc_task().
addupc() is more efficient than addupc_intr(), so some of the lost
efficiency is recovered.  However, addupc() may be broken on plain
i386's since it doesn't check for write permission like copyout().
1995-12-26 01:21:39 +00:00
Bruce Evans
80c07b6665 Finished staticizing of timevalfix(). 1995-12-26 01:07:42 +00:00
Bruce Evans
35e8beae8c Fixed bugs and finished staticization for things inside `#ifdef DEBUG'.
Moved most of these things inside `#ifdef notyet_block_reallocation_enabled'
where they may never be used again.
1995-12-22 16:06:46 +00:00
Bruce Evans
95ff47b69f Fixed permissions of /dev/tty. 1995-12-22 15:57:31 +00:00
Poul-Henning Kamp
79c0c4b77f kern_conf.c: remove a now unused variable.
vfs_cache.c: Fix a very rare probelm in the vnode-cache.
Submitted by:	Terry Lambert <terry@lambert.org>
1995-12-22 15:56:35 +00:00
Bruce Evans
6bbc7a382c Fixed pty names. The control and slave names were back to front.
Fixed pty permissions.
1995-12-22 15:53:53 +00:00
Poul-Henning Kamp
df85d797f7 Remove crufty "pg" function. 1995-12-22 13:09:39 +00:00
Julian Elischer
1dfcbb0ce3 i386/i386/conf.c is no longer needed.. remove it from files.i386
redistribute a few last routines to beter places and shoot the file

I haven't act actually 'deleted' the file yet togive people time
to
have done a config.. I.e. they are likely to have done one in a week or so
so I'll remove it then..
 it's now empty.
makes the question of a USL copyright rather moot.
1995-12-21 20:09:46 +00:00
David Greenman
c96819306b Corrected a typo in a comment. 1995-12-19 14:47:41 +00:00
David Greenman
2838c9682a Implemented a (sorely needed for years) double fault handler to catch stack
overflows.
It sure would be nice if there was an unmapped page between the PCB and
the stack (and that the size of the stack was configurable!). With the
way things are now, the PCB will get clobbered before the double fault
handler gets control, making somewhat of a mess of things. Despite this,
it is still fairly easy to poke around in the overflowed stack to figure
out the cause.
1995-12-19 14:30:50 +00:00
Poul-Henning Kamp
27a0b398a7 Staticize.
Unstaticize a function in scsi/scsi_base that was used, with an undocumented
option.
My last count on the LINT kernel shows:
Total symbols:  3647
unref symbols:   463
undef symbols:     4
1 ref symbols:  1751
2 ref symbols:   485
Approaching the pain threshold now.
1995-12-17 21:23:44 +00:00
Poul-Henning Kamp
3ac9f819ae Add an obscure feature, needed for debugging. 1995-12-17 21:11:22 +00:00
Bruce Evans
63c8f42175 Updated to match 1TB filesize changes. Some pindexes were still offsets
and weren't converted.  ptrace() was broken.
1995-12-17 06:59:36 +00:00
Bruce Evans
6a1441a3e6 Oops, the last commit missed one change from 200 to OBUFSIZ + 100. 1995-12-16 21:45:02 +00:00
Bruce Evans
5add07e53c Removed dead debugging code. 1995-12-16 21:43:47 +00:00
Bruce Evans
b62d102cbb Uniformized pr_ctlinput protosw functions. The third arg is now `void
*' instead of caddr_t and it isn't optional (it never was).  Most of the
netipx (and netns) pr_ctlinput functions abuse the second arg instead of
using the third arg but fixing this is beyond the scope of this round
of changes.
1995-12-16 02:14:44 +00:00
Bruce Evans
716962965e Removed unused function lkmenodev(). 1995-12-16 00:01:40 +00:00
Peter Wemm
b5d5c0c934 Update sysv_*.c to get their argument definitions from sysproto.h 1995-12-15 05:00:31 +00:00
Peter Wemm
295ab04920 Regenerated from syscalls.master... 1995-12-15 04:46:32 +00:00
Peter Wemm
bf4f39849b Add the direct sysv shm/sem/msg system calls, in the same way as NetBSD.
This costs very little, we gain prototypes for the calls from the linux
emulator, and this is one less thing in the way of NetBSD binary support.
1995-12-15 04:36:01 +00:00
Peter Wemm
364a760eb9 Oops. I forgot the change to this file for supporting static configuration
of the linux emulator.
1995-12-15 02:57:40 +00:00
Bruce Evans
247b53374b Changed the maximum output queue count from (TTMAXHIWAT + 200) to
(TTMAXHIWAT + OBUFSIZ + 100) in case someone changes OBUFSIZ.  200
was to allow 100 above high water for ordinary writes and another
100 for kernel printfs.

Increased the reserved output queue count from 512 to the maximum
output queue count.  This prevents exhaustion of clists and increases
the output throughput for 8 cy lines by almost a factor of 2 (on
a system where there aren't many other open ttys so clists become
exhausted after about 4 active lines (or earlier if TTMAXHIWAT is
increased :-]).

ttwrite() behaves very badly when clists are exhausted:
(1) it sleeps on lbolt instead of on TSA_OLOWAT(tp).
    This could be fixed adequately by sleeping on TSA_OLOWAT(tp).
    The nonzero reserved count guaratees that space will become
    available independent of other ttys, and a reserved count
    of 512 is barely enough for efficiency.
(2) it drops output if space runs out in the middle of special
    output processing.  This is too hard to fix without hardening
    the reserved count.  The watermark processing guarantees that
    space doesn't run out only if the advertised space is guaranteed.

Increasing the reserved output queue count defeats the point of
dynamic allocation of clists.  Previously, about 2K of memory per
tty was reserved (the raw queue was already reserved).  Now, about
3.5K is reserved.  Reserving everything would take a whole 0.5K
more.
1995-12-15 02:18:06 +00:00
Bruce Evans
a59db23b94 Disabled the sleep in ttyflush(). It can't work in general because
ttyflush() might be called from an interrupt handler.  This fixes
panics in IXOFF mode at the cost of more failures to send the START
character to exit from IXOFF mode.
1995-12-15 01:01:00 +00:00
Bruce Evans
d14122ea44 Fixed staticization of DDB functions. 1995-12-14 23:01:51 +00:00
Bruce Evans
47daf5d5d6 Nuked ambiguous sleep message strings:
old:				new:
	netcls[] = "netcls"		"soclos"
	netcon[] = "netcon"		"accept", "connec"
	netio[] = "netio"		"sblock", "sbwait"
1995-12-14 22:51:13 +00:00
Bruce Evans
947803d7d8 Restored unused function ttrstrt(). It would be used if the low level
drivers supported inter-character delays.
1995-12-14 22:32:52 +00:00
Peter Wemm
b1529bda75 GENERIC/LINT: Remove redundant quoting on some option lines.
LINT: add a couple of new/missing/undocumented options
files.i386: add linux code so that you can compile a kernel with static
linux emulation ("options LINUX")
i386/*: use #if defined(COMPAT_LINUX) || defined(LINUX) to enable static
support of linux emulation (just like "IBCS2" makes ibcs2 static)

The main thing this is going to make obvious, is that the LINUX code
(when compiled from LINT) has a lot of warnings, some of which dont look
too pleasant..
1995-12-14 14:35:36 +00:00
Poul-Henning Kamp
f708ef1b9e Another mega commit to staticize things. 1995-12-14 09:55:16 +00:00
Poul-Henning Kamp
87b6de2b76 A Major staticize sweep. Generates a couple of warnings that I'll deal
with later.
A number of unused vars removed.
A number of unused procs removed or #ifdefed.
1995-12-14 08:32:45 +00:00
Poul-Henning Kamp
5e46340891 Make math_emulators LKMable. 1995-12-14 08:21:33 +00:00
Julian Elischer
6ba9ebce28 devsw tables are now arrays of POINTERS to struct [cb]devsw
seems to work hre just fine though  I can't check every file
that changed due to limmited h/w, however I've checked enught to be petty
happy withe hte code..

WARNING... struct lkm[mumble] has changed
so it might be an idea to recompile any lkm related programs
1995-12-13 15:13:57 +00:00
John Dyson
1cdb60485c Fix a problem that was caused by new (partial) support for merged cache
metadata and VBLK type devices.  The code is currently mostly disabled,
and a work-around has been added to disabled attempted clustered writes
for VBLK type device buffers.  Clustered write of meta-data is currently
a work in progress.
1995-12-13 03:47:01 +00:00
John Dyson
beb2f78fb0 This should have fixed some conditions that could cause the
"getblk" hang.  The B_WANTED flag was being cleared gratuitously,
also the optimization of gbincore for ignoring the B_INVAL flag was
incorrect.  There is no place in the code where buffers are on the
hash list that are B_INVAL and not B_BUSY.
1995-12-12 04:18:10 +00:00
John Dyson
a316d390bd Changes to support 1Tb filesizes. Pages are now named by an
(object,index) pair instead of (object,offset) pair.
1995-12-11 04:58:34 +00:00
Bruce Evans
c73feca0b7 Removed new alias d_size_t for d_psize_t.
Removed old aliases d_rdwr_t and d_ttycv_t for d_read_t/d_write_t and
d_devtotty_t.

Sorted declarations of switch functions into switch order.

Removed duplicated comments and declarations of nonexistent switch
functions.
1995-12-10 15:55:34 +00:00
Poul-Henning Kamp
154c04e573 Last commit this round: Staticize.
we are now down to about 1146 symbols being global, of which
I estimate that about 100 are validly so.
1995-12-10 13:45:30 +00:00
Poul-Henning Kamp
7dfe504fe2 Remove various unused symbols and procedures. 1995-12-09 20:40:43 +00:00
Poul-Henning Kamp
162a9e8732 Move sysctl machdep.consdev to cons.c 1995-12-09 20:39:47 +00:00
Peter Wemm
1ed012f969 Reorganise ps_strings in order to gain BSD/OS 2.0 binary compatability.
This is now in line with NetBSD as well..

Note that once this series of commits is finished, you must recompile
libkvm, then ps and maybe 'w'.  If you are running the recently imported
sendmail-8.7, you should recompile that too (src/conf.c at least).
1995-12-09 04:29:11 +00:00
Poul-Henning Kamp
d2f265fab8 Julian forgot to make the *devsw structures static. 1995-12-08 23:23:00 +00:00
Julian Elischer
87f6c6625d Pass 3 of the great devsw changes
most devsw referenced functions are now static, as they are
in the same file as their devsw structure. I've also added DEVFS
support for nearly every device in the system, however
many of the devices have 'incorrect' names under DEVFS
because I couldn't quickly work out the correct naming conventions.
(but devfs won't be coming on line for a month or so anyhow so that doesn't
matter)

If you "OWN" a device which would normally have an entry in /dev
then search for the devfs_add_devsw() entries and munge to make them right..
check out similar devices to see what I might have done in them in you
can't see what's going on..
for a laugh compare conf.c conf.h defore and after... :)
I have not doen DEVFS entries for any DISKSLICE devices yet as that will be
a much more complicated job.. (pass 5 :)

pass 4 will be to make the devsw tables of type (cdevsw * )
rather than (cdevsw)
seems to work here..
complaints to the usual places.. :)
1995-12-08 11:19:42 +00:00
David Greenman
efeaf95a41 Untangled the vm.h include file spaghetti. 1995-12-07 12:48:31 +00:00
Bruce Evans
2baeef32b6 Removed unnecessary #includes of vm stuff. Most of them were once
prerequisites for <sys/sysctl.h>.

subr_prof.c:
Also replaced #include of <sys/user.h> by #include of <sys/resourcevar.h>.
1995-12-06 23:37:44 +00:00
Bruce Evans
40560c4471 Don't #include vm stuff in vnode_if.[ch]. Enough vm stuff (a
single typedef) is now declared in <sys/types.h>.

This is the first of 4 commits that will remove some excessive
includes of vm*.h and user.h.  The total speed improvement isn't
as large as I first thought.  `make depend; make' for LINT only
improved from 2180 seconds to 2108 seconds user time.
1995-12-06 23:33:39 +00:00
Poul-Henning Kamp
65d0bc1387 A couple of minor tweaks to the sysctl stuff. 1995-12-06 13:27:39 +00:00
Bruce Evans
4cb03b1b55 Include <vm/vm.h> or <vm/vm_page.h> explicitly to avoid breaking when
vnode_if.h doesn't include vm stuff.
1995-12-05 21:51:45 +00:00
Poul-Henning Kamp
946bb7a268 A major sweep over the sysctl stuff.
Move a lot of variables home to their own code (In good time before xmas :-)

Introduce the string descrition of format.

Add a couple more functions to poke into these marvels, while I try to
decide what the correct interface should look like.

Next is adding vars on the fly, and sysctl looking at them too.

Removed a tine bit of defunct and #ifdefed notused code in swapgeneric.
1995-12-04 16:48:58 +00:00
Jordan K. Hubbard
f205c88775 Close PR: kern/865
Submitted by:	Juergen Lock <nox@jelal.hb.north.de>
1995-12-04 02:26:53 +00:00
Bruce Evans
fb98064487 Oops, the last commit left a redundant declaration. 1995-12-03 18:00:35 +00:00
Bruce Evans
98d938220c Completed function declarations and/or added prototypes. 1995-12-02 18:58:56 +00:00
Bruce Evans
d841aaa740 Finished (?) cleaning up sysinit stuff. 1995-12-02 17:11:20 +00:00
Bruce Evans
7ee050b70c Staticized.
Added prototypes.
1995-12-02 16:32:03 +00:00
Julian Elischer
ee0bc7c399 I fixed this before than committed it on my machine and not on freefall.
(window confusion)
1995-12-02 13:08:20 +00:00
Julian Elischer
9fd7da5843 Submitted by: Heikki Suonsivu
Made the pty devices creates in devfs match the present MAKEDEV naming
1995-12-02 07:30:19 +00:00
Julian Elischer
e7a301c64f Submitted by: jb@cimlogic.com.au (John Birrell)
Obtained from:  NetBSD as well (He submitted it there too)

make sure that teh shm region is beyond the sum of the text and data segs
as it was big progs could collide with the shm region.
1995-11-30 07:58:50 +00:00
Julian Elischer
de1676f933 A pair of really tiny patches that not only allow it all to compile
but also IT ACTUALLY WORKS!
FreeBSD with options  JREMOD now runs with no entries in the devsw tables
prior to the devices puting their own entries there..

Thanks to bde and terry for thoughts and comments.
next stop 'Real' devfs support in devices.
1995-11-30 05:59:09 +00:00
Garrett Wollman
8e050b2e86 Disallow LKM manipulations when in seure mode.
Noticed by: bde
1995-11-29 17:45:59 +00:00
Julian Elischer
7198bf4725 If you're going to mechanically replicate something in 50 files
it's best to not have a (compiles cleanly) typo in it! (sigh)
1995-11-29 14:41:20 +00:00
Julian Elischer
adb2dc299a #ifdef out nearly the entire file of conf.c when JREMOD is defined
add a few safety checks in specfs because
now it's possible to get entries in [cd]devsw[] which are ALL NULL
so it's better to discover this BEFORE jumping into the d_open() entry..

more check to come later.. this getsthe code to the stage where I
can start testing it, even if I haven't caught every little error case...
I guess I'll find them quick enough..
1995-11-29 12:38:49 +00:00
Poul-Henning Kamp
2d0b1d708c A test was backwards.
Noticed by:	Cheng, Hsiao-Yang <sycheng@cis.ufl.edu>
1995-11-29 11:28:00 +00:00
Julian Elischer
53ac6efbd8 OK, that's it..
That's EVERY SINGLE driver that has an entry in conf.c..
my next trick will be to define cdevsw[] and bdevsw[]
as empty arrays and remove all those DAMNED defines as well..

Each of these drivers has a SYSINIT linker set entry
that comes in very early.. and asks teh driver to add it's own
entry to the two devsw[] tables.

some slight reworking of the commits from yesterday (added the SYSINIT
stuff and some usually wrong but token DEVFS entries to all these
devices.

BTW does anyone know where the 'ata' entries in conf.c actually reside?
seems we don't actually have a 'ataopen() etc...

If you want to add a new device in conf.c
please  make sure I know
so I can keep it up to date too..

as before, this is all dependent on #if defined(JREMOD)
(and #ifdef DEVFS in parts)
1995-11-29 10:49:16 +00:00
Bruce Evans
43cbfcb357 Removed all #includes of the unused file <sys/device.h>. 1995-11-28 07:29:59 +00:00
Peter Wemm
6884d2aae7 Implement read/write to kernel space - I use this for a self-loading/
self-decompressing ram disk that I'm fiddling with..

(Note, this depends on the various syscalls having correctly set uio_segflag
 before calling physio - I've checked and they look correct.)
1995-11-28 02:40:38 +00:00
John Dyson
dc4a0cee58 Update the wd.c driver to use the new TAILQ scheme for device
buffer queue.  Also, create a new subroutine 'tqdisksort' that
is an improved version of the original disksort that also uses
TAILQs.
1995-11-23 07:24:41 +00:00
Poul-Henning Kamp
4b2af45f4b Mega commit for sysctl.
Convert the remaining sysctl stuff to the new way of doing things.
the devconf stuff is the reason for the large number of files.
Cleaned up some compiler warnings while I were there.
1995-11-20 12:42:39 +00:00
Poul-Henning Kamp
48cee07655 Put cbstat() under #ifdef DDB 1995-11-20 12:15:45 +00:00
Poul-Henning Kamp
78535df223 Remove unused var. 1995-11-20 12:14:40 +00:00
Poul-Henning Kamp
a5d3a44198 Close the "unused" warning for things in linker-sets.
This will also allow us to catch typos in the setname by running a
nm through a grep.
1995-11-20 12:08:08 +00:00
John Dyson
fec16d9994 Yet another small block FS bug fix. 1995-11-20 04:53:45 +00:00
John Dyson
10c8eaff67 Fix more clustering bugs for FSes with block sizes < PAGE_SIZE. 1995-11-20 03:55:48 +00:00
John Dyson
fb9ca17e1e Changed an incorrect splhigh to splbio. 1995-11-19 20:42:25 +00:00
John Dyson
5fe17eeb8a General fixes to the vfs clustring code:
1) Make cluster buffer list be a non-malloced chain.  This eliminates
yet another 'evil' M_WAITOK and generally cleans up the code.
2) Fix write clustering for ext2fs.  It was just broken.  Also, ffs
clustering had an efficiency problem that more bawrites were happening
than should have been.
3) Make changes to buf.h to support the above, plus remove b_pfcent
at the request of David Greenman.
Reviewed by: davidg (partially)
1995-11-19 19:54:31 +00:00
Bruce Evans
0808c591da Fixed settimeofday():
- don't allow invalid timevals.
- normalize timevals as they are built - don't call timevaladd() with
  a possibly invalid timeval and normalize the result.

Fixed a warning.
1995-11-19 00:59:22 +00:00
John Dyson
0ada0d6748 Added a missing splx(s). 1995-11-18 23:33:48 +00:00
Bruce Evans
75a85811c1 Fixed the errno returned by rename("dir1", "dir2/."). It was EISDIR
(duh); translate it to EINVAL which is the errno for other renames
to ".".
1995-11-18 11:35:05 +00:00
Bruce Evans
3b9a76f03c Improved formatting.
Added a comment about possibly better handling of INPCK.

Added a prototype.
1995-11-18 11:07:00 +00:00
Bruce Evans
7bcb7905fd Cleaned up SA_NODEFER changes.
Added prototypes.
1995-11-18 10:01:38 +00:00
Poul-Henning Kamp
5204129576 All net.* sysctl converted now. 1995-11-16 19:00:27 +00:00
Bruce Evans
986f4ce75e Fixed support for DIAGNOSTIC option. SYSCTL_INT() depends on kernel.h. 1995-11-16 09:45:23 +00:00
Poul-Henning Kamp
43f242265a Do what is generally belived to be the right thing, though it may not be :-) 1995-11-14 20:43:29 +00:00
Poul-Henning Kamp
d457bade76 Final part of this bunch of sysctl commits: cleanup. 1995-11-14 09:42:22 +00:00
Poul-Henning Kamp
af8364b0ad Get rid of the last debug sysctl variables of the old style. 1995-11-14 09:40:06 +00:00
Poul-Henning Kamp
9565c0e60d Get rid of hostnamelen variable. 1995-11-14 09:37:22 +00:00
Poul-Henning Kamp
a9ad941c7a Move all the VM sysctl stuff home where it belongs. 1995-11-14 09:29:34 +00:00
Poul-Henning Kamp
16cd04a3b8 A couple of nitpicks. 1995-11-14 09:26:17 +00:00
Poul-Henning Kamp
f7152c81a0 Convert dumpdev & securelevel. 1995-11-14 09:22:15 +00:00
Poul-Henning Kamp
395e673587 Change some of the debug sysctl vars. The semantics of these will change. 1995-11-14 09:19:16 +00:00
Poul-Henning Kamp
549a075acc KERN_MAXFILESPERPROC, KERN_MAXFILES went to another file. 1995-11-14 09:17:32 +00:00
Poul-Henning Kamp
972f9b209d Hmm, I seem to have got all my patches screwed up anyway. Too bad.
this is where the proctable stuff went.
1995-11-14 09:16:27 +00:00
Poul-Henning Kamp
27aef04699 Get rid of domainnamelen. 1995-11-14 09:10:54 +00:00
Poul-Henning Kamp
a52752a457 Move KERN_NTP to a more suitable file. 1995-11-14 09:07:14 +00:00
Poul-Henning Kamp
45a4ad1146 Move the process-table stuff to a more suitable file.
Remove filetable stuff from kern_sysctl.c
1995-11-14 09:05:40 +00:00
Poul-Henning Kamp
18e6fe0250 Add new-style sysctl for KERN_FILE here. 1995-11-14 08:58:35 +00:00
Poul-Henning Kamp
deae269ab1 Try to make my new scheme work more along the lines of the manual.
There are still some gray areas here and there.
1995-11-13 13:54:09 +00:00
David Greenman
c2f9f36bae Use kmem_alloc_pageable/kmem_free to allocate memory instead of individual
VM map functions.
1995-11-13 10:45:22 +00:00
Bruce Evans
c8cbd8682f Fixed a cast in olseek().
Fixed confusing order of declarations of getvnode()'s args.
1995-11-13 08:22:21 +00:00
Poul-Henning Kamp
ae0eb976c5 The entire sysctl callback to read/write version. I havn't tested this as
much as I'd like to, but the malloc stunt I tried for an interim for
sure does worse.
Now we can read and write from any kind of address-space, not only
user and kernel, using callbacks.
This may be over-generalization for now, but it's actually simpler.
1995-11-12 19:52:09 +00:00
Bruce Evans
f35a53bf11 Restored the (buggy) historical behaviour of getdomainname().
Negative name lengths for getdomainname() and setdomainname() were
converted to large positive ones by misdeclaring the args struct.
1995-11-12 07:04:30 +00:00
Bruce Evans
d2d3e8751c Included <sys/sysproto.h> to get central declarations for syscall args
structs and prototypes for syscalls.

Ifdefed duplicated decentralized declarations of args structs.  It's
convenient to have this visible but they are hard to maintain.  Some
are already different from the central declarations.  4.4lite2 puts
them in comments in the function headers but I wanted to avoid the
large changes for that.
1995-11-12 06:43:28 +00:00
Bruce Evans
c484c256a5 Updated machine-generated files. 1995-11-12 04:29:37 +00:00
Bruce Evans
93915a2ac4 Fixed the args list for mount(). We're not ready for the BSD4.4lite2/
NetBSD interface.

Increased the bogusness of the args list for mmap().  The args lists for
most of the memory mapping functions are bogus.  The args lists in
syscalls.master are a little better than the ones in the args structs
currently being used, but the improvement for mmap() changed the object
code and I don't want to worry about that now.

Increased the bogusness of the args list for fcntl.  BSD4.4lite2/NetBSD
uses `void *' instead of int for the third arg.  This has the advantage
of working when `void *'s are longer than ints, but requires extra bogus
casts that I hope to avoid.

Fixed the args list for uname.  `struct outsname' seems to be a typo,
not an old interface.

Added comments about bogus args lists for open, mount, msync, munmap,
mprotect, madvise, mincore, fcntl, semsys, msgsys and shmsys.
1995-11-12 04:24:53 +00:00
Bruce Evans
7147b19de5 Fixed the type of readv(). An args struct member name conflicted with the
machine-generated one in <sys/sysproto.h>.
1995-11-11 06:57:34 +00:00
Bruce Evans
82970b81a9 Fixed type of setsid(). It used used the bogus `getsid_args'. 1995-11-11 06:53:08 +00:00
Bruce Evans
b2f9e8b1ee Removed unreachable code.
Changed `#if defined()' back to `#ifdef' to finish removing COMPAT_IBCS2.
1995-11-11 05:49:22 +00:00
Bruce Evans
cf7e5eab8b Fixed types of rtprio(), osetrlimit() and setrlimit(). The args struct
tag and/or member names conflicted with the machine generated ones in
<sys/sysproto.h>.
1995-11-11 01:48:17 +00:00
Bruce Evans
2635f86c68 Fixed types of ogethostid() and osethostid(). The args struct names
conflicted with the machine generated ones in <sys/sysproto.h>.

Fixed type of oquota().  It didn't even use an args struct.
1995-11-11 01:04:42 +00:00
Bruce Evans
ceba6236e0 Fixed type of vfs_free_netcred().
Removed redundant declaration of insmntque().
1995-11-11 00:27:00 +00:00
Bruce Evans
3c8e79dd2b Fixed type of sysctl_order_cmp().
KNFized sysctl_order_cmp().
Staticized definition of kern_sysctl() to match its declaration.
1995-11-11 00:09:21 +00:00
Poul-Henning Kamp
69feb38841 Fix a minor buglet. 1995-11-10 16:22:41 +00:00
Poul-Henning Kamp
6ff1bbebdf convert more sysctl variables. 1995-11-10 09:58:53 +00:00
Poul-Henning Kamp
b8da239623 Make the old compat functions use the sysctl front door, rather than
crashing through the walls.
This should save Peters blood pressure and netscapes uname call.
1995-11-09 20:22:12 +00:00
Bruce Evans
5739bf963a Introduced lkm_nullcmd(), which will be used instead of nosys() in
some places to fix type mismatches.

Added prototypes and bogus casts.
1995-11-09 09:43:32 +00:00
Bruce Evans
f57e65478d Introduced a type `vop_t' for vnode operation functions and used
it 1138 times (:-() in casts and a few more times in declarations.
This change is null for the i386.

The type has to be `typedef int vop_t(void *)' and not `typedef
int vop_t()' because `gcc -Wstrict-prototypes' warns about the
latter.  Since vnode op functions are called with args of different
(struct pointer) types, neither of these function types is any use
for type checking of the arg, so it would be preferable not to use
the complete function type, especially since using the complete
type requires adding 1138 casts to avoid compiler warnings and
another 40+ casts to reverse the function pointer conversions before
calling the functions.
1995-11-09 08:17:23 +00:00
Poul-Henning Kamp
787d58f201 Fix some of the sysctl broke, and add a lot more to it. 1995-11-08 08:48:36 +00:00
John Dyson
5e527f652f This is a modification missed by me in the msync fixes a few days ago. 1995-11-07 05:09:43 +00:00
Poul-Henning Kamp
2e21099372 On working the new sysctl vars a bit I realized that I needed more generality.
This is here now.  We can now access (the new) sysctl variables from the
kernel too and using functions to handle access is more sane now.
I will now attack sysctl variables in the rest of the kernel and get them
all converted to newspeak.
1995-11-06 16:18:52 +00:00
David Greenman
c52007c2cc All:
Changed vnodep -> vp for consistency with the rest of the kernel, and
changed iparams -> imgp for brevity.

kern_exec.c:
   Explicitly initialized some additional parts of the image_params struct
to avoid bzeroing it. Rewrote the set-id code to reduce the number of
logical tests. The rewrite exposed a mostly benign bug in the algorithm:
traced set-id images would get ktracing disabled even if the set-id didn't
happen for other reasons.
1995-11-06 12:52:37 +00:00
Bruce Evans
8b25681eb5 Replaced bogus macros for dummy devswitch entries by functions.
These functions went away:

	enosys (hasn't been used for some time)
	enxio
	enodev
	enoioctl (was used only once, actually for a vop)

if_tun.c:
Continued cleaning up...

conf.h:
Probably fixed the type of d_reset_t.  It is hard to tell the correct
type because there are no non-dummy device reset functions.

Removed last vestige of ambiguous sleep message strings.
1995-11-06 00:36:19 +00:00
John Dyson
4dc4e0d228 Make MNT_ASYNC more effective for UFS. It should not be too much more
dangerous than the original MNT_ASYNC.  There might be some minor
security considerations due to data writes not being posted as promptly
as before.  Meta-data operations are still not quite as fast as Linux,
but streaming I/O is still higher.
1995-11-05 21:01:15 +00:00
John Dyson
aef922f514 Greatly simplify the msync code. Eliminate complications in vm_pageout
for msyncing.  Remove a bug that manifests itself primarily on NFS
(the dirty range on the buffers is not set on msync.)
1995-11-05 20:46:03 +00:00
Bruce Evans
286f8561e2 Replaced bogus macros for entry points to unconfigured line disciplines
by functions.

tty_conf.c:
Cleaned up formatting of tables.

Removed another ARGSUSED for consistency.

conf.h:
Introduced typedefs for line discipline functions.

Backed out most of previous revision (it is done elsewhere).
1995-11-05 20:25:59 +00:00
Bruce Evans
4fda91c705 Moved prototypes for devswitch functions from conf.c and driver sources
to <machine/conf.h>.  conf.h was mechanically generated by
`grep ^d_ conf.c >conf.h'.  This accounts for part of its ugliness.  The
prototypes should be moved back to the driver sources when the functions
are staticalized.
1995-11-04 13:25:33 +00:00
David Greenman
3956a1702c Return EINVAL if the number of groups is less than 1 in setgroups().
Obtained from:	4.4BSD-Lite2
1995-11-04 10:50:55 +00:00
Bruce Evans
046bc05396 Prototype getvnode() in the right place (where ibcs2_stat.c can see it). 1995-11-04 10:35:26 +00:00
Garrett Wollman
ff5c09da20 Make somaxconn (maximum backlog in a listen(2) request) and sb_max
(maximum size of a socket buffer) tunable.

Permit callers of listen(2) to specify a negative backlog, which
is translated into somaxconn.  Previously, a negative backlog was
silently translated into 0.
1995-11-03 18:33:46 +00:00
Peter Wemm
0839e0de72 Make putc and b_to_q deal with clists with no reserved blocks in a more
civilised manner than panicing.  This only happens as a result of another
state botch somewhere else, eg: from a tty driver calling putc or b_to_q
on a closed device.  Apparently, it's also been implicated in a panic
with a status (^T) event on ptys.

This change should pretty well be in it's final form now.
1995-11-02 08:37:22 +00:00
Peter Wemm
a317bc2c36 Clean up the previous commit I did on this file.
The Jury has not reached a verdict yet on this approach - a better fix
may be thought of, but for now this works.
1995-11-01 15:59:55 +00:00
Bruce Evans
bb1140a9a5 Fixed initialization of TS_CONNECTED bit in t_state. It wasn't
set in open() when CLOCAL is set unless carrier is present.

Fixed initialization of line discipline.  It lived across opens.
Lines that started with the wrong discipline probably didn't work
at all, because TS_ISOPEN is only set by TTYDISC.
1995-10-31 19:27:50 +00:00
Peter Wemm
e8c8f201ec Make a putc()/b_to_q() to a clist that hasn't had cblocks reserved
non-fatal.  I've make it return an appropriate error to the caller instead
of panic()ing.

Handling an error condition is inherently more friendly than exploding
the kernel.. :-)  The new behavior is a little closer to traditional
clists, potentially making porting a little simpler.

Suggested by: bde (many months ago, I've been using this for a while..)
1995-10-31 19:00:00 +00:00
Bruce Evans
7a6e2e527b Removed an annoying redundant declaration that I added in the previous
revision.
1995-10-30 17:16:55 +00:00
Poul-Henning Kamp
a98ca4699e Second batch of cleanup changes.
This time mostly making a lot of things static and some unused
variables here and there.
1995-10-29 15:33:36 +00:00
Poul-Henning Kamp
4ccc87c594 Remove unused functions and variables, make things static, and other cleanups. 1995-10-28 15:39:31 +00:00
Poul-Henning Kamp
3a34a5c3b8 Sorry, the last commit screwed up for me, this is the right one (I hope!)
Please refer to the previous commit message about sysctl variables.
1995-10-28 13:07:28 +00:00
Poul-Henning Kamp
b396cd832c Rewamp the way we make sysctl variables to be easier to cope with.
The goal is to make them "user-friendly" :-)

In the end this will allow a SNMP style "getnext" function, sysctl editing
in the boot-editor and/or debugger, LKMs can define sysctl vars when
they get loaded, and remove them when unloaded and other interesting
uses for dynamic sysctl variables.
1995-10-28 12:59:25 +00:00
Bruce Evans
e887950a45 Call vfs_unbusy() before error returns from sysctl_vnode(). This fixes
PR 795.

Set the size before one error return from sysctl_vnode() the same as before
the other.  The caller might want to know about the amount successfully
read although the current caller doesn't.
1995-10-28 08:50:08 +00:00
Bruce Evans
e2f15ca546 Fixed data loss in writes to pty masters. Data was almost always lost
at the end of each write for writes of more than 1K.

Fixed handling of residual count for early returns in writes to pty masters.
It was only adjusted in 2 out of 6 cases.

Added prototypes.
1995-10-25 18:23:58 +00:00
Bruce Evans
12bc45a8df Fix clist limits. They were usually one too low. E.g., for a limit of
TTYHOG = 1024 bytes, 10 cblocks were reserved.  This was thought to
provide 10 * CBSIZE = 1080 bytes of buffering, but if the head pointer
is at the end of a cblock, then it only provides 1 + 9 * CBSIZE = 973
bytes of buffering.  This caused serious data loss for ptys because the
flow control is deterministic and requires at least TTYHOG bytes of
buffering.  For ttys, if input flow control is used then there is
usually enough slop in the high watermark to avoid problems, and if
input flow control isn't used then a limit of 973 is not much different
from a limit of 1024.

Add prototypes.

Continue cleaning up new init stuff.
1995-10-25 17:59:58 +00:00
Steven Wallace
f23c6d682b Remove COMPAT_IBCS2 option.
Ibcs2 emulator no longer depends on owait() or any other hack to wait4().
1995-10-23 19:44:38 +00:00
Bruce Evans
8159bae9d0 Fix a sign extension bug that was unleashed by the previous change.
The total process time was sometimes 2^32 usec too large but that
wasn't a problem before because the time was bogusly truncated mod
2^32.
1995-10-23 19:05:50 +00:00
Bruce Evans
5fdb832498 Simplify the pseudo-argument removal changes by not optimizing for
the !COMPAT_43 case - use a common function even when there is no
`old' function.  The diffs for this are large because of code motion
to restore the function order to what it was before the pseudo-argument
changes.

Include <sys/sysproto.h> to get correct args structs and prototypes.
The diffs for this are large because the declarations of the args structs
were moved to become comments in the function headers.  The comments may
actually match the automatically generated declarations right now.

Add prototypes.
1995-10-23 15:42:12 +00:00
John Dyson
cd0402ec7a Interface change for the VOP_GETPAGES -- missed in previous commits. 1995-10-23 02:55:55 +00:00
David Greenman
d68a41903e Moved the filesystem read-only check out of the syscalls and into the
filesystem layer, as was done in lite-2. Merged in some other cosmetic
changes while I was at it. Rewrote most of msdosfs_access() to be more
like ufs_access() and to include the FS read-only check.

Obtained from: partially from 4.4BSD-lite2
1995-10-22 09:32:48 +00:00
Bruce Evans
725db531b8 Start including <sys/sysproto.h> to get the correct args structs and
prototypes for all syscalls.  The args structs are still declared in
comments as in VOP implementation functions.  I don't like the
duplication for this, but several more layers of changes are required
to get it right.  First we need to catch up with 4.4lite2, which uses
macros to handle struct padding.  Then we need to catch up with NetBSD,
which passes the args correctly (as void *).  Then we need to handle
varargs functions and struct padding better.  I think all the details
can be hidden in machine-generated functions so that the args structs
and verbose macros to reference them don't have to appear in the core
sources.

Add prototypes.

Add bogus casts to hide the evil type puns exposed by the previous
steps.  &uap[1] was used to get at the args after the first.  This
worked because only the first arg in *uap was declared.  This broke
when the machine- genenerated args struct declared all the args
(actually it declares extra args in some cases and depends on the
user stack having some accessible junk after the last arg, not to
mention the user args being on the stack.  It isn't possible to
declare a correct args struct for a varargs syscall).  The msgsys(),
semsys() and shmsys() syscall interfaces are BAD because they
multiplex several syscalls that have different types of args.
There was no reason to duplicate this sysv braindamage but now
we're stuck with it.  NetBSD has reimplemented the syscalls properly
as separate syscalls #220-231.

Declare static functions as static in both their prototype and their
implementation (the latter is optional, and this misfeature was used).

Remove gratuitous #includes.

Continue cleaning up new init stuff.
1995-10-21 19:50:00 +00:00
Bruce Evans
bcee717be5 Avoid overflow in calcru(). Fixes PR 788.
Submitted by:	imdave@synet.net (Dave Bodenstab)
1995-10-21 09:18:45 +00:00
David Greenman
079cc25b11 Killed a few gratuitous #include's. 1995-10-21 08:38:13 +00:00
John Dyson
6d875bf526 If we clear the B_CACHE flag because a buffer isn't composed fully of
valid bytes, we must also clear the B_DONE flag.  Some filesystems
depend on this (incl NFS) and is probably the cause of the biodone
error and subsequent crash.  Anyway this change needs to be made.
1995-10-19 23:48:25 +00:00
Steven Wallace
1e41c1b5d5 Implement SA_NODEFER sa_flag for sigaction():
Add SA_NODEFER define to signal.h
	Add ps_nodefer field to struct sigacts in signalvar.h.
	Add code to kern_sig.c to handle SA_NODEFER.

If flag is set, when the signal is delivered, it is not masked automatically
from receiving the same signal again.

Reviewed by:	 wollman, bde
1995-10-19 19:16:01 +00:00
Garrett Wollman
07e3b0c25b Improve clock accuracy by accounting for late/missed clock interrupts
if the hardware supports it.
1995-10-12 20:35:01 +00:00
Steven Wallace
88c94611b1 Remove the '1' from getpeername1 and getsockname1 when NOT COMPAT_OLDSOCK.
Left it in there by mistake.
1995-10-11 06:09:45 +00:00
Steven Wallace
c3e5be204b Remove the ugly COMPAT_IBCS2 hack to hide a return value through
magic numbers.  The new socksys support does not need this hack.

I am against any magic practicing.
1995-10-10 08:08:54 +00:00
Bruce Evans
029b0fc88f Fix tracing of syscalls. The previous fix required the undocumented
option DDB_NO_LCALLS to stop ddb getting control and broke all ddb
tracing.  Now there is no option and no way for ddb to trace at
address _Xsyscall or to _Xsyscall, but tracing everywhere else
works.  The previous fix did unnecessary things for Linux syscalls.

Don't bother checking that syscall frames are for user mode.

Make debugger traps inside the kernel (except at addresses _Xsyscall
and _Xsyscall+1) fatal if ddb is not configured.  They "can't happen".

Add prototypes.

Remove stupid comments, e.g., /*ARGSUSED*/ for args that are used.
1995-10-09 04:36:01 +00:00
John Dyson
f4a73b85ed Work-around a problem in the clustering code on non-VMIO buffers. The
write-side needs rewriting, but this makes a ktrace panic go away for
now.
1995-10-09 03:19:49 +00:00
Steven Wallace
ad7507e248 Remove prototype definitions from <sys/systm.h>.
Prototypes are located in <sys/sysproto.h>.

Add appropriate #include <sys/sysproto.h> to files that needed
protos from systm.h.

Add structure definitions to appropriate files that relied on sys/systm.h,
right before system call definition, as in the rest of the kernel source.

In kern_prot.c, instead of using the dummy structure "args", create
individual dummy structures named <syscall>_args.  This makes
life easier for prototype generation.
1995-10-08 00:06:22 +00:00
Steven Wallace
a932a33de3 Fix misc formatting errors in makesyscalls.sh.
Add CPT_NOA type which is COMPAT with NOARGS -- do not produce argument
struct in sysproto.

Change accept, recvfrom, getsockname to CPT_NOA type.
Fix getrlimit, setrlimit argument #2 name to struct rlimit.
1995-10-07 23:56:20 +00:00
Steven Wallace
93c9414e49 Remove compat_43 psuedo-argument hack, and replace with a better hack.
Instead of using a fake "compat" argument, pass a real compat int to function
if COMPAT_43 is defined.  Functions involved: wait4, accept, recvfrom,
getsockname.

With the compat psuedo-argument, this introduces an argument structure
that can have two possible sizes depending on compat options.
This makes life difficult for lkm modules like ibcs2, which would
have to guess what size used in kernel when compiled.  Also,
the prototype generator for these structures cannot generate proper sizes.

Now there is only one fixed structure and makes everybody happy.

I recommend these changes be introduced to 2.1 so that ibcs2, linux
lkm's generated for 2.2 can still run on a 2.1 kernel.
1995-10-07 23:47:26 +00:00
Steven Wallace
4887ee51b2 Remake generated files to reflect makesyscalls.sh changes 1995-10-07 06:29:30 +00:00
Steven Wallace
f171307e84 Add new functionality to makesyscalls.sh:
o  optional config-file to set vars: sysnames, sysproto, sysproto_h,
	syshdr, syssw, syshide, syscallprefix, switchname, namesname, sysvec.
  o  change syntax of syscalls.master entry:
	remove argument count.
	add pseudo-prototype field defining function name and arguments.
  o  generates correct structure definitions for all system calls
	in sys/sysproto.h
  o  add type NOARGS:  same as STD except do not create structure in
	sys/sysproto.h
  o  add type NOPROTO:  same as STD except do not create structure or function
	prototype in sys/sysproto.h

New functionality provides complete prototype definitions.
Usefull for generating files for emulated systems like my new ibcs2 code.

Update syscalls.master to reflect new changes.  For example, read()
entry now looks like:

3	STD	POSIX	{ int ibcs2_read(int fd, char *buf, u_int nbytes); }

This is similar to how NetBSD generates these files.
1995-10-07 06:24:08 +00:00
Poul-Henning Kamp
e83e1865c0 A little hack to avoid a 64bit divide. Can go away if Gcc ever learns to
optimise 64bit stuff...
1995-10-06 09:43:32 +00:00
Julian Elischer
4c1a35b2a6 fix REALLY STUPID bug/typo
don't look at the diffs.. it's too embarassing :)
1995-10-04 08:58:00 +00:00
Julian Elischer
00c6cadad3 Submitted by: Juergen Lock <nox@jelal.hb.north.de>
Obtained from: other people on the net ?

1. stepping over syscalls (gdb ni) sends you to DDB, and returned
to the wrong address afterwards, with or without DDB.  patch in
i386/i386/trap.c below.

2. the linux emulator (modload'ed) still causes panics with DIAGNOSTIC,
re-applied a patch posted to one of the lists...
1995-10-04 07:08:04 +00:00
Julian Elischer
d8af1be3d9 add the file kern_conf.c so it can be compiled in when needed
for testing.. (for cdevsw_add and bdevsw_add)

make the lkm code use the new generic devsw add routines (if so required)
1995-10-04 03:42:39 +00:00
Julian Elischer
f8a760b32a actually compiles.. (previous commit was to just get it into the tree) 1995-10-02 10:15:40 +00:00
Julian Elischer
26453f354f Obtained from: well it has a relationship with the LKM code..
This is a place for all things to do with conf.c and conf.h
that are not machine specific.
Other things that are at present in i386/isa/conf.c might
migrate into here..
It's the first small step in cleaning up the device interface
to make it more dynamic and to assist in more modular drivers
(i.e. both loadable via LKMs and linked in..
e.g able to add a device without having to edit conf.c)

this code is not yet used and the whole thing will be conditionally
compiled in for a while till proven useful :)
1995-10-02 09:24:44 +00:00
David Greenman
7329854ac4 Two critical bugfixes:
1) "obj" was't initialized properly, resulting in an important vm_page_lookup
   always failing (resulting in a panic).
2) busy pages could be put on the cache queue or freed (resulting in a panic).
1995-10-01 05:50:27 +00:00
John Dyson
164fd96f34 These changes fix a bug in the clustering code that I made worse when adding
support for EXT2FS.  Note that the Sig-11 problems appear to be caused by
this, but there is still probably an underlying VM problem that let this
clustering bug cause vnode objects to appear to be corrupted.

The direct manifestation of this bug would have been severely mis-read
files.  It is possible that processes would Sig-11 on very damaged
input files and might explain the mysterious differences in system
behaviour when phk's malloc is being used.
1995-09-23 21:12:45 +00:00
Bruce Evans
c1b0bf4649 Update machine-generated files. 1995-09-19 13:56:09 +00:00
Bruce Evans
d60a9ca6ab Oops. Avoid literal $Id in an awk string to stop cvs from substituting it. 1995-09-19 13:50:26 +00:00
Bruce Evans
3cb43dbdaf Generate prototypes for syscall-implementing functions. Put them in
<sys/sysproto.h> and use them (so far only) in kern/init_sysent.c.

Don't put $Id in generated files.

kern/syscalls.master:
I had to add some new fields to describe some non-orthogonal names.
E.g., the args struct for the syscall-implementing function foo()
is usually named `foo_args', but for getpid() it is named `args'.

sys/sysent.h:
sy_call_t is still incomplete to hide a couple of warnings.
1995-09-19 13:31:04 +00:00
Bruce Evans
04cc52dfc3 Don't clear the session pointer in ptcclose(). It must be left alone
until the session leader exits so that a SIGHUP gets sent to the process
group and the pty slave gets revoked.
1995-09-19 12:26:47 +00:00
Bruce Evans
191e1a59da Remove transitory labelling code. Labels are now handled by essentially
the original 4.4lite code.  Machine Specific Partitions are now handled
separately.
1995-09-16 17:04:06 +00:00
Bruce Evans
5e3e8d2b88 Generate prototypes for VOP functions. I decided to keep the old-style
definitions even though the functions are inline.  If vnode_if.h was
compiled by a non-ANSI compiler, then `inline' would be defined away,
so vnode_if.h might compile correctly.
1995-09-11 16:05:16 +00:00
Bruce Evans
e7451974bb Make pcvt and syscons live in the same kernel. If both are enabled, then
the first one in the config has priority.  They can be switched using
userconfig().

i386/i386/conf.c:
Initialize the shared syscons/pcvt cdevsw entry to `nx'.

Add cdevsw registration functions.

Use devsw functions of the correct type if they exist.

i386/i386/cons.c:
Add renamed syscons entry points to constab.

i386/i386/cons.h:
Declare the renamed syscons entry points.

i386/i386/machdep.c:
Repeat console initialization after userconfig() in case the current
console has become wrong.  This depends on cn functions not wiring down
anything important.

sys/conf.h:
Declare new functions.

i386/isa/isa.[ch]:
Add a function to decide which display driver has priority.  Should be
done better.

i386/isa/syscons.c:
Rename pccn* -> sccn*.

Initialize CRTC start address in case the previous driver has moved it.

i386/isa/syscons.c, i386/isa/pcvt/*
Initialize the bogusly shared variable Crtat dynamically in case the
stored value was changed by the previous driver.

Initialize cdevsw table from a template.

Don't grab the console if another display driver has priority.

i386/isa/syscons.h, i386/isa/pcvt/pcvt_hdr.h:
Don't externally declare now-static cdevsw functions.

i386/isa/pcvt/pcvt_hdr.h:
Set the sensitive hardware flag so that pcvt doesn't always have lower
priority than syscons.  This also fixes the "stupid" detection of the
display after filling the display with text.

i386/isa/pcvt/pcvt_out.c:
Don't be confused the off-screen cursor offset 0xffff set by syscons.

kern/subr_xxx.c:
Add enough nxio/nodev/null devsw functions of the correct type for syscons
and pcvt.
1995-09-10 21:36:12 +00:00
Bruce Evans
f2cb5630d0 cons.c:
Split off cdevsw initialization in cninit() into a new function
cninit_finish() that isn't called until all hardware device drivers
have been attached.  The bdevsw entry of the driver for the physical
console needs to be hooked after the physical driver has been
attached in case the attachment modified the entry.

Rearrange cninit() to avoid changing cn_tab until the driver for the
physical console has been initialized, so that the previous driver
(if any) can be used for debugging.

Start removing half-baked lint support.  bdevsw functions usually have
unused args but /*ARGSUSED*/ was used for only about 5% of them.

cons.h:
Declare cn_init_finish().

autoconf.c:
Call cn_init_finish().

Start adding prototypes.  Functions with bogus linkage (extern where
static is probably should be static) are explicitly declared as extern
so that the can be found easily (extern in a non-header is usually
wrong).

All:
Continue cleaning up init stuff: init functions shall be static;
INITs should be at the start of files...
1995-09-10 18:57:26 +00:00
Bruce Evans
e7c89b42c5 Fix wakeups for TIOCDRAINWAIT. The conditional wakeups introduced in rev
1.59 defeated the point of doing the wakeups (having reduced timeouts
take effect immediately).
1995-09-10 11:48:13 +00:00
David Greenman
4590fd3a2a Fixed init functions argument type - caddr_t -> void *. Fixed a couple of
compiler warnings.
1995-09-09 18:10:37 +00:00
David Greenman
1984b014a0 Fix my copyright. 1995-09-08 13:24:33 +00:00
Bruce Evans
6003967057 Fix benign type mismatches in devsw functions. 82 out of 299 devsw
functions were wrong.
1995-09-08 11:09:15 +00:00
Nate Williams
4756154a9e Removed unused local variable from shutdown_nice() 1995-09-06 15:23:20 +00:00
John Dyson
c83ebe7781 Added VOP_GETPAGES/VOP_PUTPAGES and also the "backwards" block count
for VOP_BMAP.  Updated affected filesystems...
1995-09-04 00:21:16 +00:00
John Dyson
41db6f5f99 VOP_BMAP will eventually need an additional argument, but not yet. This
backs out that modification to minimize the window during which this
is not yet correct.
1995-09-03 20:32:52 +00:00
John Dyson
8c601f7da8 Improvements to the cluster code, minor vfs_bio efficiency:
Better performance -- more aggressive read-ahead
	under certain circumstanses.

	Mods to support clustering on small
	( < PAGE_SIZE) block size filesystems (e.g. ext2fs,
	msdosfs.)
1995-09-03 19:56:15 +00:00
Julian Elischer
8af5d536ff devfs changes..
changes to allow devices that don't probe (e.g. /dev/mem)
to create devfs entries
this required giving 'configure' its own SYSINIT entry
so we could duck in just before it with a DEVFS init
and some device inits..
my devfs now looks like:
./misc
./misc/speaker
./misc/mem
./misc/kmem
./misc/null
./misc/zero
./misc/io
./misc/console
./misc/pcaudio
./misc/pcaudioctl
./disks
./disks/rfloppy
./disks/rfloppy/fd0.1440
./disks/rfloppy/fd1.1200
./disks/floppy
./disks/floppy/fd0.1440
./disks/floppy/fd1.1200
also some sligt cleanups.. DEVFS needs a lot of work
but I'm getting back to it..
1995-09-03 05:43:50 +00:00
John Dyson
5dce41c5a5 Increase the size of the pipe buffer as denoted by PIPSIZ from
4k to 8k.  This has a significant effect on the pipe performance.  In
the future it might be good to increase this to 16k.  PIPSIZ is now
tunable for experimentation.
1995-08-31 01:39:31 +00:00
Bruce Evans
088f73968c Fix several sysinit functions that had the wrong type and unnecessarily
external linkage.

Remove useless comments saying that SYSINIT() does system initialization.

shm.c:
Remove nearly useless comment that gave wrong pseudo-prototypes.
1995-08-30 00:33:02 +00:00
Bruce Evans
41a93c86d6 Fix benign type mismatch in a sysinit function arg. 1995-08-30 00:17:18 +00:00
Bruce Evans
9ef6c28ae2 Fix benign type mismatches and nested extern declarations in new sysinit
code.

Fix old and new missing prototypes.
1995-08-29 23:59:22 +00:00
Bruce Evans
5c7761b2af kmstartup had the wrong type and unnecessarily external linkage for a
sysinit function.

subr_prof.c:
Remove useless comment.
1995-08-29 03:09:14 +00:00
Bruce Evans
4bb0ce8ce3 Fix correct_writedisklabel() and writedisklabel(). Their setting of
bp->b_flags has been broken for many years:
a) they didn't set B_BUSY for doing i/o.  This has been fatal since
   1995/07/25 when biodone() started checking that B_BUSY is set.
b) they didn't set B_INVAL for releasing the buffer.  This at best
   just put a useless buffer in the LRU queue for a little while.

Fix a couple of spelling errors and complete a couple of function
pointer declarations.
1995-08-28 16:09:11 +00:00
Julian Elischer
2b14f991e6 Reviewed by: julian with quick glances by bruce and others
Submitted by:	terry (terry lambert)
This is  a composite of 3 patch sets submitted by terry.
they are:
New low-level init code that supports loadbal modules better
some cleanups in the namei code to help terry in 16-bit character support
some changes to the mount-root code to make it a little more
modular..

NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able
to test those cases..

certainly mounting root of disk still works just fine..
mfs should work but is untested. (tomorrows task)

The low level init stuff includes a total rewrite of init_main.c
to make it possible for new modules to have an init phase by simply
adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can
be added to the kernel without editing any other files other than the
'files' file.
1995-08-28 09:19:25 +00:00
Bruce Evans
430179f0c3 Don't compile the diagnostic functions vhold() and holdrele() unless
DIAGNOSTIC is defined.
1995-08-25 20:49:44 +00:00
Bruce Evans
5e319b84a1 Remove extra arg from one of the calls to (*pr_usrreq)(). 1995-08-25 20:27:46 +00:00
Bruce Evans
e3546115f3 Call nosys() from lkmnosys() with the correct number and type of args
instead of with none.  The first (struct proc *) arg is used if lkmnosys()
if is actually called.

Implement lkmnosys() with the correct number and type of args so that
the first of them can be used and the others won't need to be fixed
lated.
1995-08-25 20:03:02 +00:00
David Greenman
9f95e53cff Another minor optimization, this time to incore(). 1995-08-24 13:59:14 +00:00
David Greenman
ff3aaf2582 Minor optimization. 1995-08-24 13:28:16 +00:00
David Greenman
229296b0cf Killed some gratuitous #include's. 1995-08-24 12:54:11 +00:00
David Greenman
c0e5de7d88 Moved setting of VTEXT flag into the appropriate image activators. This
fixes a bug where linux binaries would get the flag set inappropriately.
1995-08-24 10:32:37 +00:00
Doug Rabson
27df97742b Add support for amd direct maps.
Reviewed by:	Thomas Graichen <graichen@sirius.physik.fu-berlin.de>
1995-08-24 10:17:39 +00:00
Jordan K. Hubbard
215b0e62d5 Don't clip d_ncylinders to value used by partitions. 1995-08-23 11:43:45 +00:00
Jordan K. Hubbard
b8ef36f62e Properly initialize the d_ncylinders field to the maximum number of
cylinders.
1995-08-23 10:41:57 +00:00
David Greenman
4219d2b2ac A couple of micro optimizations to improve NULL syscall performance by
about 2%.
1995-08-21 18:06:48 +00:00
David Greenman
cd92a6182d Call boot() instead of cpu_reset() if init isn't running in shutdown_nice. 1995-08-20 04:42:25 +00:00
Bruce Evans
cf2455a3ec The cred' and proc' args were missing for some VOP_OPEN() and VOP_CLOSE()
calls.

Found by: gcc -Wstrict-prototypes after I supplied some of the 5000+
missing prototypes.  Now I have 9000+ lines of warnings and errors
about bogus conversions of function pointers.
1995-08-17 11:53:51 +00:00
Bruce Evans
bf25be48a5 Make everything except the unsupported network sources compile cleanly
with -Wnested-externs.
1995-08-16 16:14:28 +00:00
David Greenman
628641f8a6 Converted mountlist to a CIRCLEQ.
Partially obtained from: 4.4BSD-Lite2
1995-08-11 11:31:18 +00:00
David Greenman
b4c196550c Move mbuf frees to after call to sorflush().
Submitted by:	Matt Dillon
1995-08-08 02:22:16 +00:00
David Greenman
74ca9fa64f On closer inspection, it turns out that all of the callers of disksort
are already at splbio()...so back out the last change to disksort.
1995-08-07 14:20:27 +00:00
David Greenman
5d210d3fd4 Since buffers can be pulled off of the disk queue at interrupt time and
disksort is called at non-interrupt time and can be actively traversing
the list when that happens, there is a very small window of vulnerability.
Close it by protecting disksort with splbio().
1995-08-07 11:55:32 +00:00
David Greenman
b4224c9c6c Woops, I committed the wrong version of the diff in the last rev. 1995-08-07 08:40:49 +00:00
David Greenman
6c8897cf98 Made msgbuf range checking more robust and clean. 1995-08-07 07:58:23 +00:00
David Greenman
02d5c7b197 Restore check for msg_bufx being negative. Changed if() expression to be
in Lite2 style.
1995-08-06 22:00:17 +00:00
Joerg Wunsch
352abcd4a7 Extentd David's recent change to shutdown_nice() by calling
cpu_reset() directly in case init(8) is *not* running.
1995-08-06 19:45:34 +00:00
David Greenman
d63abe4172 Resize both VMIO and non-VMIO buffers if the size changes. 1995-08-06 12:10:39 +00:00
Andrey A. Chernov
e581051d3d Preserve current termios speed for TIOCSET*, if it matched with
nearest valid. It means that gtty+stty transaction (without speed
change) not breaks non-standard speeds now.
1995-08-02 12:53:14 +00:00
Andrey A. Chernov
4e5f73581c Better approximation for TIOCGETP (gtty) for non-standard speeds.
Old variant returns 38400 for them, now it returns nearest matched
rounded down, expect speeds in range 0 > speed < 50 rounded up
to not produce hangup.
1995-08-02 12:03:12 +00:00
Andrey A. Chernov
29ae13ad3c Back out predefined termios speeds check, it can cause troubles
with interaction pty <-> serial driver with non-standard speed.
So, nothing protect us from garbadge in speed field, expect
checking for < 0 left in tty.c :-(
1995-08-02 11:26:50 +00:00
Andrey A. Chernov
af2a00bbbc Check for valid speed values in pty drive
Check for negative speed values in tty drive
Back out valid speed values checking from tty drive
Suggested by: bde
1995-08-02 06:55:36 +00:00
Bruce Evans
76107ba3af Don't set TS_ZOMBIE flag for non-open ptys. ptcclose() has always done
too much for non-open ptys, but there is normally no problem because the
l_modem(, 0) is a no-op for closed ptys provided the line discipline is
standard and MDMBUF isn't set.
1995-08-02 02:55:47 +00:00
Andrey A. Chernov
271381b3b8 Optimize a bit valid speed search using fact that speed table sorted
Submitted by:
Obtained from:
1995-08-01 23:38:00 +00:00
Andrey A. Chernov
7a82fc7855 Check for valid speeds in TIOCSET* and return EINVAL for incorrect
values instead of setting garbadge.
1995-08-01 23:27:36 +00:00
David Greenman
4777741358 Removed my special-case hack for VOP_LINK and fixed the problem with the
wrong vp's ops vector being used by changing the VOP_LINK's argument order.
The special-case hack doesn't go far enough and breaks the generic
bypass routine used in some non-leaf filesystems. Pointed out by Kirk
McKusick.
1995-08-01 18:51:02 +00:00
Bruce Evans
19829865ca Obtained from: partly from ancient patches of mine via 1.1.5
Change all short variables in `struct tty' to int.  Shorts were only
right on ancient systems with ints optimized for vaxness over
efficiency.
1995-07-31 22:50:08 +00:00
Bruce Evans
35b46c174c Obtained from: partly from ancient patches of mine via 1.1.5
Handle MDMBUF a little better.  Prepare to handle 4 different kinds of
output flow control.
1995-07-31 22:48:46 +00:00
Bruce Evans
f91307e23d Obtained from: an ancient patch of mine via 1.1.5
Clear PENDIN when input is flushed so that the handling of future input
doesn't get pessimized.
1995-07-31 21:43:37 +00:00
Bruce Evans
9fa18570a2 Obtained from: partly from ancient patches of mine via 1.1.5
Introduce TS_CONNECTED and TS_ZOMBIE states.  TS_CONNECTED is set
while a connection is established.  It is set while (TS_CARR_ON or
CLOCAL is set) and TS_ZOMBIE is clear.  TS_ZOMBIE is set for on to
off transitions of TS_CARR_ON that occur when CLOCAL is clear and
is cleared for off to on transitions of CLOCAL.  I/o can only occur
while TS_CONNECTED is set.  TS_ZOMBIE prevents further i/o.

Split the input-event sleep address TSA_CARR_ON(tp) into TSA_CARR_ON(tp)
and TSA_HUP_OR_INPUT(tp).  The former address is now used only for
off to on carrier transitions and equivalent CLOCAL transitions.
The latter is used for all input events, all carrier transitions
and certain CLOCAL transitions.  There are some harmless extra
wakeups for rare connection- related events.  Previously there were
too many extra wakeups for non-rare input events.

Drivers now call l_modem() instead of setting TS_CARR_ON directly
to handle even the initial off to on transition of carrier.  They
should always have done this.  l_modem() now handles TS_CONNECTED
and TS_ZOMBIE as well as TS_CARR_ON.

gnu/isdn/iitty.c:
Set TS_CONNECTED for first open ourself to go with bogusly setting
CLOCAL.

i386/isa/syscons.c, i386/isa/pcvt/pcvt_drv.c:
We fake carrier, so don't also fake CLOCAL.

kern/tty.c:
Testing TS_CONNECTED instead of TS_CARR_ON fixes TIOCCONS forgetting to
test CLOCAL.  TS_ISOPEN was tested instead, but that broke when we disabled
the clearing of TS_ISOPEN for certain transitions of CLOCAL.

Testing TS_CONNECTED fixes ttyselect() returning false success for output
to devices in state !TS_CARR_ON && !CLOCAL.

Optimize the other selwakeup() call (this is not related to the other
changes).

kern/tty_pty.c:
ptcopen() can be declared in traditional C now that dev_t isn't short.
1995-07-31 21:02:00 +00:00
Bruce Evans
177af312cd Assorted cosmetic changes:
Make more functions static.

tty.c:
Use tcflag_t (u_long) and cc_t instead of u_char and int/long.

Don't record values that are only evaluated once.

Compare ints using imin(), not min().  min() is for comparing u_ints.
Old versions of tty.c used the type-safe but multiple-evaluation-unsafe
macro MIN().  The args are apparently never negative; otherwise this
change would be non-cosmetic.

Don't repeat the loop test in ttywait().

tty.h:
Improve English in and formatting of comments.
1995-07-31 19:17:19 +00:00
Bruce Evans
f3b37f91c1 Improve input flow control.
Use input buffer watermarks of TTYHOG-512 (high) and (high)*7/8
(low) instead of TTYHOG/2 (high) and TTYHOG/5 (low) to agree with
some drivers.  512 is magic and some things depended on TTYHOG/2
>= TTYHOG-512 to work; now they depend on the 512 magic not changing
and TTYHOG-512 being significantly larger than 0.  This should be
handled in ttsetwater().

Separate the decision about whether to do input flow control from
doing it.  ttyblock() now just starts input flow control (hardware
and/or software) and there is a new function ttyunblock() to stop
it.  The decisions are the same except for the watermark changes
and allowing for input expansion for PARMRK.

When flushing input, try harder at first to send a start character
if required, but give up if the first attempt fails.

cy.c, rc.c, sio.c:
Simplify: let ttyinput() handle input flow control if it is not
being bypassed.  Use ttyblock() to start flow control otherwise.

rc.c:
Use same input flow control test as elsewhere: test in a more
efficient order and start flow control at >= highwater instead of
at > highwater.
1995-07-31 18:29:51 +00:00
Mike Pritchard
e145373611 Fix the sysctl string routines to return as much of the
string as possible and return ENOMEM if the entire string cannot
be returned.  This brings the routines in line with how the man
page says they work, and how the calling routines are expecting
them to work.  This allows the dummy uname() routine in libc to
obtain the version string, since the kernel version string is
longer than that normally returned by the uname() routine.
This is 3/4 of the fix for PR# 462.

Reviewed by: Bruce Evans
1995-07-31 10:07:31 +00:00
Bruce Evans
70eec7420c Ignore trailing slashes in pathnames that "refer to a directory",
as is required to be POSIXLY_CORRECT and "right".  I interpret
"referring to a directory" as being a directory or becoming a
directory.  E.g., the trailing slashes in mkdir("/nonesuch/"),
rename("/tmp", /nonesuch/") and link("/tmp", "/root_can_like_dirs/")
are ignored because the target will become a directory if the
syscall succeeds.  A trailing slash on a symlink causes the symlink
to be followed (this is a bug if the symlink doesn't point to a
directory; fix later).
1995-07-31 00:35:58 +00:00
David Greenman
a705fd3e48 Fix a bug in my disabled version of trap_pfault()...curpcb may be NULL even
when curproc isn't. This condition occurs at system startup and perhaps
at other times.
1995-07-30 17:49:24 +00:00
David Greenman
887f41183e Rewrote shutdown_nice() to fix the init-not-yet-started panic(). 1995-07-30 17:10:36 +00:00
Bruce Evans
79ccb9aff3 Don't swap the queue headers to implement concatenation of the
queues for TIOCSETA[W].  Swapping an even number of times broke
the queue resource limits.  This would have broken CRTSCTS flow
control if the clist slush list was used up.

Don'concatenate the queues for TIOCSETA[W] if one of the queues
has a resource limit of 0.  Concatenation would cause a panic if
one of the queues is nonempty and the other is limited to length
0.  This may have caused panics in PPPDISC.

Wake up readers after all transitions of ICANON.  When ICANON is
turned off it is quite likely that characters will become available
to be read.

Reduce indentation near these changes.
1995-07-30 13:52:56 +00:00
Bruce Evans
d7515ab5cf Split TS_ASLEEP (sleep on output [below low water])into TS_SO_OLOWAT (sleep
on output below low water) and TS_SO_OCOMPLETE (sleep on output complete).
Most of the support for this has already been committed.  Drivers should
call ttwwakeup() to handle wakeups whenever output is below low water
(and some output event causes this condition to be checked) or TS_BUSY is
cleared.

tty.c:
Fix the livelock in ttywait() properly by sleeping on output complete, not
on output below low water.

Use ttwwakeup() instead of separate select and output wakeups for all
wakeups of writers.

Add wakeups of writers for output flushes and carrier/clocal transitions.

Don't go to sleep in ttycheckoutq() if ttstart() reduces the queue to below
low water.

Use the timeout built into tsleep() in ttycheckoutq().

Optimize the select wakeup in ttwwakeup().  It seems reasonable to know
too much about the internals of tp->t_wsel now that the knowledge is
localised in tty.c.
1995-07-30 12:39:42 +00:00
Bruce Evans
267513a942 Obtained from: partly from ancient patches by ache and me via 1.1.5
Remove nullmodem().

It may be useful to have a null modem routine, but nullmodem()
wasn't one.  nullmodem() was identical to ttymodem() except it
didn't implement MDMBUF (carrier) flow control, didn't do any
wakeups for off to on carrier transitions, and didn't flush the
i/o queues for on to off carrier transitions (flushing has the side
effect of waking up readers and writers) although it did generate
SIGHUPs.  The wakeups must normally be done even if nullmodem() is
null in case something is sleeping waiting for a carrier transition.
In any case, the wakeups should be harmless.  They may cause bogus
results for select(), but select() is already bogus for nonstandard
line disciplines.
1995-07-29 13:40:13 +00:00
Bruce Evans
28f8db1403 Eliminate sloppy common-style declarations. There should be none left for
the LINT configuation.
1995-07-29 11:44:31 +00:00
David Greenman
1c8fc26cb0 Fixed panic in fill_eproc() caused by inadequate checking for NULL pointers. 1995-07-28 18:04:47 +00:00
David Greenman
23953f95f6 Killed bogus casts in tsleep/wakeup calls. 1995-07-25 05:41:57 +00:00
David Greenman
cd9015557e Fixed broken offset use in vfs_unbusy_pages() which resulted in several
different types of panics/inconsistencies with NFS clients.
Cleared PG_WANTED where appropriate.
Added checks for buffer busy in allocbuf and biodone.

Reviewed by:	John Dyson
1995-07-25 05:03:06 +00:00
David Greenman
23f762689d Panic if no object in biodone. Slightly optimized allocbuf() again. 1995-07-24 03:16:41 +00:00
Mike Pritchard
57585a8e54 Use the same method to determine the time that the process
ended that fork() uses to determine the time that the process
started when calculating the elapsed time.  This prevents the
ac_etime field in the accounting record from getting set to -1
if the process exists for a VERY short period of time.
1995-07-23 23:02:20 +00:00
David Greenman
be49bd16c6 Added some additional diagnostic information output when panicing in
biodone().
1995-07-23 19:37:52 +00:00
David Greenman
31de6175b7 Fixed two cases where some parans were missing, resulting in some bogus
logic. Slightly simplified allocbuf().
1995-07-23 18:49:48 +00:00
Bruce Evans
abe8bea470 Obtained from: partly from ancient patches of mine via 1.1.5
Give names to the magic tty i/o sleep addresses and use them.  This makes
it easier to remember what the addresses are for and to keep them unique.
1995-07-22 16:45:22 +00:00
Bruce Evans
a16721a13a Move the inline code for waking up writers to a new function
ttwwakeup().  The conditions for doing the wakeup will soon become
more complicated and I don't want them duplicated in all drivers.

It's probably not worth making ttwwakeup() a macro or an inline
function.  The cost of the function call is relatively small when
there is a process to wake up.  There is usually a process to wake
up for large writes and the system call overhead dwarfs the function
call overhead for small writes.
1995-07-22 01:30:45 +00:00
Bruce Evans
2ce42987d3 Obtained from: partly from ancient patches of mine via 1.1.5
Move static termioschars() from a couple of drivers to tty.c.  Now there
is only one copy of ttydefchars[].
1995-07-21 22:52:01 +00:00
Bruce Evans
6644e30617 Obtained from: partly from ancient patches by ache and me via 1.1.5
Nuke `symbolic sleep message strings'.  Use unique literal messages so that
`ps l' shows unambiguously where processes are sleeping.
1995-07-21 20:57:15 +00:00
Bruce Evans
491cb8cd99 Obtained from: partly from anancient patch of mine via 1.1.5
Fix races for FIONREAD, TIOCSTI and TIOCSTAT.
1995-07-21 17:30:12 +00:00
Bruce Evans
0d1de831ea Obtained from: partly from an ancient patch of mine via 1.1.5
Temporarily nuke TS_WOPEN.  It was only used for the obscure MDMBUF
flow control option in the kernel and for informational purposes
in `pstat -t'.  The latter worked properly only for ptys.  In
general there may be multiple processes sleeping in open() and
multiple processes that successfully opened the tty by opening it
in O_NONBLOCK mode or during a window when CLOCAL was set.  tty.c
doesn't have enough information to maintain the flag but always
cleared it in ttyopen().

TS_WOPEN should be restored someday just so that `pstat -t' can
display it (MDMBUF is already fixed).  Fixing it requires counting
of processes sleeping in open() in too many serial drivers.
1995-07-21 16:30:59 +00:00
Bruce Evans
d83f358fa3 Obtained from: an ancient patch of mine via 1.1.5
Don't put partial PARMRK escape sequences in the input queue.  Use
MAX_INPUT = TTYHOG instead of TTYHOG directly for the maximum input
queue size.  Don't use the bogus MAX_INPUT advertised in
<sys/syslimits.h>.
1995-07-21 14:41:43 +00:00
Bruce Evans
2ef5801909 Add to TODO list and move it to near the top of the file. 1995-07-21 14:15:09 +00:00
Bruce Evans
a2a072b542 Obtained from: ancient usenet posting as applied to 1.1.5
First of many changes required to restore lost stability to the tty
driver.

ECHONL is supposed to enable echoing of NL when ECHO is off, but it
enabled echoing of everything except NL.
1995-07-21 13:56:29 +00:00
David Greenman
44918dfed7 Re-lookup the buffer if the vnode isn't locked. The previous check for
VBLK vnodes isn't adequate since all NFS nodes aren't locked, either. The
result is a race condition that would lead to duplicate buffers at the
same block offset.

Submitted by:	John Dyson
1995-07-21 04:55:45 +00:00
David Greenman
24aa09cd4f vnode_pager_alloc() never returns NULL, so don't check for it. 1995-07-20 09:43:12 +00:00
David Greenman
1ce781c3af Fixed "bufspace" calculation. It was lossy in some circumstances of the
buffer resizing and caused a "newbuf" deadlock.

Reviewed by:	John Dyson & David Greenman
Submitted by:	Peter Wemm
1995-07-17 06:26:07 +00:00
Peter Wemm
1174c7d121 This fixes a compiler warning, and a cosmetic problem with the linux
emul code when compiling with "options KTRACE".
ktrsyscall() was expecting an array of integers, this was passing the
address of a structure containing an array of integers..
The cosmetic problem was that it was calling the "enter syscall"
trace hook twice - this looks like a cut/paste error/typo.
1995-07-16 14:10:55 +00:00
Joerg Wunsch
446cee6e6d Include ``options POWERFAIL_NMI'' for owners of older (non-apm)
notebooks where a powerfail condition (external power drop; battery
state low) is signalled by an NMI.  Makes it beep instead of panicing.

Reviewed by:	davidg
1995-07-16 10:31:26 +00:00
Bruce Evans
97e156674d Don't include <sys/tty.h> in drivers that aren't tty drivers or in general
files that don't depend on the internals of <sys/tty.h>
1995-07-16 10:13:08 +00:00
David Greenman
9e951f36f1 Truncate the fault address to a page boundry when calling vm_fault(). The
last change to fix the fault-twice bug with page tables wasn't quite
complete.
1995-07-16 05:39:22 +00:00
David Greenman
8393c48a22 Resize buffers if they aren't the correct size. Several months ago we
made a change to NFS that caused buffers at EOF to be variable size. This
had the undesired side-effect of breaking delayed writes on NFS. This
fixes it.

Submitted by:	John Dyson
1995-07-15 16:01:46 +00:00
David Greenman
4a67eb7121 Fixed bug that caused page tables to be faulted twice instead of once.
Submitted by:	John Dyson
1995-07-14 09:25:51 +00:00
David Greenman
24a1cce34f NOTE: libkvm, w, ps, 'top', and any other utility which depends on struct
proc or any VM system structure will have to be rebuilt!!!

Much needed overhaul of the VM system. Included in this first round of
changes:

1) Improved pager interfaces: init, alloc, dealloc, getpages, putpages,
   haspage, and sync operations are supported. The haspage interface now
   provides information about clusterability. All pager routines now take
   struct vm_object's instead of "pagers".

2) Improved data structures. In the previous paradigm, there is constant
   confusion caused by pagers being both a data structure ("allocate a
   pager") and a collection of routines. The idea of a pager structure has
   escentially been eliminated. Objects now have types, and this type is
   used to index the appropriate pager. In most cases, items in the pager
   structure were duplicated in the object data structure and thus were
   unnecessary. In the few cases that remained, a un_pager structure union
   was created in the object to contain these items.

3) Because of the cleanup of #1 & #2, a lot of unnecessary layering can now
   be removed. For instance, vm_object_enter(), vm_object_lookup(),
   vm_object_remove(), and the associated object hash list were some of the
   things that were removed.

4) simple_lock's removed. Discussion with several people reveals that the
   SMP locking primitives used in the VM system aren't likely the mechanism
   that we'll be adopting. Even if it were, the locking that was in the code
   was very inadequate and would have to be mostly re-done anyway. The
   locking in a uni-processor kernel was a no-op but went a long way toward
   making the code difficult to read and debug.

5) Places that attempted to kludge-up the fact that we don't have kernel
   thread support have been fixed to reflect the reality that we are really
   dealing with processes, not threads. The VM system didn't have complete
   thread support, so the comments and mis-named routines were just wrong.
   We now use tsleep and wakeup directly in the lock routines, for instance.

6) Where appropriate, the pagers have been improved, especially in the
   pager_alloc routines. Most of the pager_allocs have been rewritten and
   are now faster and easier to maintain.

7) The pagedaemon pageout clustering algorithm has been rewritten and
   now tries harder to output an even number of pages before and after
   the requested page. This is sort of the reverse of the ideal pagein
   algorithm and should provide better overall performance.

8) Unnecessary (incorrect) casts to caddr_t in calls to tsleep & wakeup
   have been removed. Some other unnecessary casts have also been removed.

9) Some almost useless debugging code removed.

10) Terminology of shadow objects vs. backing objects straightened out.
    The fact that the vm_object data structure escentially had this
    backwards really confused things. The use of "shadow" and "backing
    object" throughout the code is now internally consistent and correct
    in the Mach terminology.

11) Several minor bug fixes, including one in the vm daemon that caused
    0 RSS objects to not get purged as intended.

12) A "default pager" has now been created which cleans up the transition
    of objects to the "swap" type. The previous checks throughout the code
    for swp->pg_data != NULL were really ugly. This change also provides
    the rudiments for future backing of "anonymous" memory by something
    other than the swap pager (via the vnode pager, for example), and it
    allows the decision about which of these pagers to use to be made
    dynamically (although will need some additional decision code to do
    this, of course).

13) (dyson) MAP_COPY has been deprecated and the corresponding "copy
    object" code has been removed. MAP_COPY was undocumented and non-
    standard. It was furthermore broken in several ways which caused its
    behavior to degrade to MAP_PRIVATE. Binaries that use MAP_COPY will
    continue to work correctly, but via the slightly different semantics
    of MAP_PRIVATE.

14) (dyson) Sharing maps have been removed. It's marginal usefulness in a
    threads design can be worked around in other ways. Both #12 and #13
    were done to simplify the code and improve readability and maintain-
    ability. (As were most all of these changes)

TODO:

1) Rewrite most of the vnode pager to use VOP_GETPAGES/PUTPAGES. Doing
   this will reduce the vnode pager to a mere fraction of its current size.

2) Rewrite vm_fault and the swap/vnode pagers to use the clustering
   information provided by the new haspage pager interface. This will
   substantially reduce the overhead by eliminating a large number of
   VOP_BMAP() calls. The VOP_BMAP() filesystem interface should be
   improved to provide both a "behind" and "ahead" indication of
   contiguousness.

3) Implement the extended features of pager_haspage in swap_pager_haspage().
   It currently just says 0 pages ahead/behind.

4) Re-implement the swap device (swstrategy) in a more elegant way, perhaps
   via a much more general mechanism that could also be used for disk
   striping of regular filesystems.

5) Do something to improve the architecture of vm_object_collapse(). The
   fact that it makes calls into the swap pager and knows too much about
   how the swap pager operates really bothers me. It also doesn't allow
   for collapsing of non-swap pager objects ("unnamed" objects backed by
   other pagers).
1995-07-13 08:48:48 +00:00
Bruce Evans
270d5e9f91 Optimize the zeroing of quotes. b_to_q() was always taking about 20% of
its time zeroing quotes although quotes are not very common.  E.g., there
are never any quotes in output queues.
1995-07-11 19:39:54 +00:00
David Greenman
06cb725951 Moved call to VOP_GETATTR() out of vnode_pager_alloc() and into the places
that call vnode_pager_alloc() so that a failure return can be dealt with.
This fixes a panic seen on NFS clients when a file being opened is deleted
on the server before the open completes.
1995-07-09 06:58:03 +00:00
Peter Wemm
6ece4a516d This implements enough of the BSDI extensions to the net-2 ogetkerninfo()
syscall to allow applications linked against their libc's uname() to
work.  Netscape 1.1N being a prime example, which prints:
"uname() failed. cant tell what system we're running on".
This change is a little ugly, but that's mainly because of the "interesting"
semantics of the BSDI extension.
Since ogetkerninfo() is only enabled by COMPAT_43, Netscape will only
be affected on kernels with that option (eg: "GENERIC")
Reviewed by:	davidg
1995-07-09 02:49:30 +00:00
David Greenman
e0dca2b939 Improve negative usecount diagnostic a little. 1995-07-08 04:10:32 +00:00
David Greenman
083c109df6 The generated VCALL always uses the first vp which in the case of /link/
might not be handled by the same FS as the directory (e.g. special device
files)...so it must be special-cased. This bug is seen when doing
"ln /dev/console /dev/foo" or equivilent and first appeared after I fixed
the argument order of VOP_LINK.  YUCK! There really needs to be a way of
specifying what vp to use in the VCALL; doing this could fix the strategy
and bwrite special-cases, too.
1995-07-07 13:41:28 +00:00
David Greenman
3d5e37c501 Removed "GATEWAY" consideration when calculating number of mbuf clusters.
It now always uses the value that was used for the GATEWAY case.
1995-06-29 08:21:32 +00:00
David Greenman
ac7e6123a6 Killed "TIMEZONE" and "DST" options. They have been forced to 0 by config
for more than a year now. Moved the declaration of 'tz' into kern_time.c.
1995-06-29 07:07:00 +00:00
David Greenman
6663c3d522 Removed extra semicolon. 1995-06-28 12:32:47 +00:00
David Greenman
b619731843 Don't include vm_pageout.h. 1995-06-28 12:31:47 +00:00
David Greenman
aa2cabb958 1) Converted v_vmdata to v_object.
2) Removed unnecessary vm_object_lookup()/pager_cache(object, TRUE) pairs
   after vnode_pager_alloc() calls - the object is already guaranteed to be
   persistent.
3) Removed some gratuitous casts.
1995-06-28 12:01:13 +00:00
David Greenman
9879652657 Fixed VOP_LINK argument order botch. 1995-06-28 07:06:55 +00:00
Bruce Evans
6acceb40dc Pass the correct nonblocking flag to VOP_CLOSE() in vclean().
VOP_CLOSE() takes `F' (file) flags, not `IO' flags.  At least that's
what close() passes.  I previously fixed ttylclose() to check
FNONBLOCK instead of IO_NDELAY.  This broke the call from vclean()
and cleaning of ptys sometimes deadlocked.
1995-06-27 21:29:08 +00:00
Bruce Evans
9207f00ac0 The pessimistic rounding in hzto() was too pessimistic for realitimexpire(). 1995-06-26 07:48:50 +00:00
Bruce Evans
4ebf8117df Partially fix `sysctl machdep.console_device'. The fix will be complete
when syscons stops mapping the console to minor MAXCONS.  There is
usually no corresponding device in /dev, and the correct device has
minor 0.

cons.c:
Initialize cn_tty properly, so that CPU_CONSDEV can work.
Comment about too many variants of the console tty pointer.

machdep.c:
Return device NODEV and not error EFAULT when there is no console device.
1995-06-26 07:39:52 +00:00
Andrey A. Chernov
a526d6bb67 ttywait: convert EWOULDBLOCK to EIO, when t_timeout expired 1995-06-24 16:28:20 +00:00
Andrey A. Chernov
13cf82d487 Replace EWOULDBLOCK to EIO in ttwrite, when t_timeout expired 1995-06-23 21:20:10 +00:00
Andrey A. Chernov
00999cd623 Optimized and simplified version of setreuid/gid
Fixed: lack of crcopy in certain conditions, lack
of setting sv[ug]id in certain conditions. Fixes non-critical.
1995-06-15 22:32:03 +00:00
Bruce Evans
f53dbe9765 Convert %p to 0x%x instead of to 0x%8x. The latter gives blank padding
in the wrong place.  Blank padding in the right place or zero padding
would be inconsistent with user mode.

Put case 'p' in alphabetical order.

Implement %p in sprintf() too.  I'd like only a single, more complete
printf() core, perhaps one based on vsnprintf().
1995-06-14 07:55:07 +00:00
Bruce Evans
39a7e2a41a Output \n as \r\n, not as \n\r. 1995-06-14 04:52:39 +00:00
Rodney W. Grimes
d3628763db Merge RELENG_2_0_5 into HEAD 1995-06-11 19:33:05 +00:00
Rodney W. Grimes
9b2e535452 Remove trailing whitespace. 1995-05-30 08:16:23 +00:00
David Greenman
cddc961a83 Made "NMBCLUSTERS" calculation dynamic and fixed bogus use of "NMBCLUSTERS"
in machdep.c (it should use the global nmbclusters). Moved the calculation
of nmbclusters into conf/param.c (same place where nmbclusters has always
been assigned), and made the calculation include an extra amount based
on "maxusers". NMBCLUSTERS can still be overrided in the kernel config
file as always, but this change will make that generally unnecessary. This
fixes the "bug" reports from people who have misconfigured kernels seeing
the network "hang" when the mbuf cluster pool runs out.

Reviewed by:	John Dyson
1995-05-25 07:36:24 +00:00
David Greenman
d53eacdf28 This should fix PR 438. Apparently I never tested disklabel on the block
device.

v_numoutput wasn't incremented to match the b_iodone nesting.  It's still
fishy that vwakeup() clears B_WRITEINPROG before biodone() has finished;
however, B_WRITEINPROG seems to be never used.

Submitted by:	Bruce Evans
1995-05-24 23:33:42 +00:00
David Greenman
61f5d51062 Changes to fix the following bugs:
1) Files weren't properly synced on filesystems other than UFS. In some
   cases, this lead to lost data. Most likely would be noticed on NFS.
   The fix is to make the VM page sync/object_clean general rather than
   in each filesystem.
2) Mixing regular and mmaped file I/O on NFS was very broken. It caused
   chunks of files to end up as zeroes rather than the intended contents.
   The fix was to fix several race conditions and to kludge up the
   "b_dirtyoff" and "b_dirtyend" that NFS relies upon - paying attention
   to page modifications that occurred via the mmapping.

Reviewed by:	David Greenman
Submitted by:	John Dyson
1995-05-21 21:39:31 +00:00
David Greenman
2976b7f19f NFS diskless operation was broken because swapdev_vp wasn't initialized.
These changes solve the problem in a general way by moving the
initialization out of the individual fs_mountroot's and into swaponvp().

Submitted by:	Poul-Henning Kamp
1995-05-19 03:27:08 +00:00
Poul-Henning Kamp
4977228d33 Make the "information" slice printfs if(bootverbose).
Fix the message about Ontrack.
1995-05-18 22:45:35 +00:00
David Greenman
1469eec81e Fixed incompleteness that would allow dirty filesystems to get mounted
when the single user shell was terminated. These changes disallow mounting
or R/W upgrading filesystems that are dirty unless "-f" (force) option
is used with mount. /etc/rc has been modified to abort the startup if
one or more non-nfs partitions fail to mount.

Reviewed by:	Poul-Henning Kamp, Rod Grimes
1995-05-15 08:39:37 +00:00
David Greenman
a401ebbe32 Changed swap partition handling/allocation so that it doesn't
require specific partitions be mentioned in the kernel config
file ("swap on foo" is now obsolete).

From Poul-Henning:

The visible effect is this:

As default, unless
        options "NSWAPDEV=23"
is in your config, you will have four swap-devices.
You can swapon(2) any block device you feel like, it doesn't have
to be in the kernel config.

There is a performance/resource win available by getting the NSWAPDEV right
(but only if you have just one swap-device ??), but using that as default
would be too restrictive.

The invisible effect is that:

Swap-handling disappears from the $arch part of the kernel.
It gets a lot simpler (-145 lines) and cleaner.

Reviewed by:	John Dyson, David Greenman
Submitted by:	Poul-Henning Kamp, with minor changes by me.
1995-05-14 03:00:10 +00:00
David Greenman
c4cf09ffe6 pread/pwrite() should be static.
Submitted by:	sef
1995-05-12 21:39:48 +00:00
Garrett Wollman
5bb4f73817 The death of `options NODUMP'. Now the dump area can be dynamically
configured (and unconfigured) on the fly.  A sysctl(3) MIB variable is
provided to inspect and modify the dump device setting.
1995-05-12 19:17:31 +00:00
David Greenman
15f1b09648 Increased ratio of allowed vnodes on freelist to 1/4th of the total. This
is more representative of worst case situations of 4 files/directory. (If
that last sentence doesn't make any sense, I'm not surprised. It's rather
compilcated how this all fits together....).
This should fix a problem that Ed Hudson has been complaining about where
directories with lots of symlinks could cause excessive disk I/O.
1995-05-12 04:24:53 +00:00
Rodney W. Grimes
b2b795f07c Fix -Wformat warnings from LINT kernel. 1995-05-11 19:26:53 +00:00
Garrett Wollman
c9cd353a18 Delete two debugging printfs that mistakenly crept in. 1995-05-11 00:16:44 +00:00
Garrett Wollman
748e0b0acc Make networking domains drop-ins, through the magic of GNU ld. (Some day,
there may even be LKMs.)  Also, change the internal name of `unixdomain'
to `localdomain' since AF_LOCAL is now the preferred name of this family.
Declare netisr correctly and in the right place.
1995-05-11 00:13:26 +00:00
David Greenman
54ea0c000f Unlock the vnode before sleeping on an OBJ_DEAD object. Should fix Bruce's
hang. Fixed some formatting anomolies and removed some unneeded casts.
1995-05-10 18:59:11 +00:00
David Greenman
6c206048ae Improved hashinit panic strings. 1995-05-08 23:11:12 +00:00
Bruce Evans
599eb538d8 Fix reopening of open subdevices for DIOCSYNCSLICEINFO:
Reopen the bdev for the raw partition and not the cdev if only the bdev
was open.
Don't use a bogus limit for the number of partitions to possibly reopen
(bug found by Julian).

Add function dssize() to help fix wdsize() and sdsize().  The slice
layer knows more about (un)open partitions and partition sizes than
the driver layer.
1995-05-08 16:24:08 +00:00