Commit Graph

75 Commits

Author SHA1 Message Date
Poul-Henning Kamp
e4d0d8c84a msg 2003-02-26 20:53:28 +00:00
Warner Losh
a163d034fa Back out M_* changes, per decision of the TRB.
Approved by: trb
2003-02-19 05:47:46 +00:00
Alfred Perlstein
44956c9863 Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.
Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.
2003-01-21 08:56:16 +00:00
Thomas Moestl
20207b60a8 Declare the snp ioctl()s to work on udev_t, since that is what they
really do and dev_t is defined differently in kernel and userland.
Return a correctly formed udev from SNPGTTY.

Reviewed by:	dd
2002-11-11 10:45:31 +00:00
Dima Dorfman
f4c5dfbb9a Treat input on the snp device as an `unsigned char'. According to the
submitter, this permits Russian (and probably other locales') characters
to be entered via watch(8).

PR:		35636
Submitted by:	Gleb Smirnoff <glebius@rinet.ru>
2002-04-10 03:51:49 +00:00
Alfred Perlstein
e51a25f850 Remove __P. 2002-03-20 02:08:01 +00:00
Alfred Perlstein
85f190e4d1 Fixes to make select/poll mpsafe.
Problem:
  selwakeup required calling pfind which would cause lock order
  reversals with the allproc_lock and the per-process filedesc lock.
Solution:
  Instead of recording the pid of the select()'ing process into the
  selinfo structure, actually record a pointer to the thread.  To
  avoid dereferencing a bad address all the selinfo structures that
  are in use by a thread are kept in a list hung off the thread
  (protected by sellock).  When a selwakeup occurs the selinfo is
  removed from that threads list, it is also removed on the way out
  of select or poll where the thread will traverse its list removing
  all the selinfos from its own list.

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

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

Proc locks are no longer used in select/poll.

Portions contributed by: davidc
2002-03-14 01:32:30 +00:00
Dima Dorfman
cdd530ca19 Make the diagnostics printfs less ugly. 2002-03-11 03:48:32 +00:00
Dima Dorfman
2c1a6f2178 Check the return value of tsleep() in snpread(). This may be
important, since our sleep is interruptable (PCATCH flag).

PR:		30985
Discovered by:	Vladimir Jakovenko <vovik@lucky.net>
Submitted by:	Valentin Nechayev <netch@segfault.kiev.ua>
2001-11-24 15:59:46 +00:00
Dima Dorfman
2c9fb90995 Return EBUSY if we try to attach to a tty that is already being
snooped on.  This causes all kinds of Bad Things(tm) to happen since
closing one session will clobber state that's needed for the other
one.  This could theoretically be supported if the code was careful,
but until somebody implements that, preventing this will stop people
from unknowingly shooting themselves in the foot.
2001-11-24 15:34:18 +00:00
Dima Dorfman
2f7a385114 Create a snpbasedev variable which holds a reference to the first snp
device cloned, and assign all further devices to depend on it.  This
allows us to call dev_depends() on it at module unload time to get rid
of /dev/snp* (in the devfs case, anyway).  For this to work, we must
not destroy the device at close time.  [Idea stolen from if_tun.]

The above has the following sideaffects: (a) The snp device used by
watch(8) will remain after watch(8) exits.  This is probably how it
should have been all along, and how it was before devfs came along.
(b) Module unload doesn't panic if there are any /dev/snp* devices
which haven't been used (and thus previously destroyed).  Thus, we can
reenable the unload functionality disabled in rev. 1.65.

PR:		32012
2001-11-24 15:10:53 +00:00
Robert Watson
101823b1a1 'error' is now unused, since its only purpose was to catch the
results of suser_td().
2001-11-15 19:42:08 +00:00
Robert Watson
474f15b863 Temporarily disable unloading, as it appears to be broken (read: causes
panics)
2001-11-15 19:41:14 +00:00
Robert Watson
ca7779ceca o Rely on /dev/snp* permissions, rather than using suser() in snpopen()
to prevent inappropriate use of the snoop device.  This means that,
  with appropriate chmod'ing, arbitrary users may make use of the snoop
  device.
2001-11-15 19:28:49 +00:00
Julian Elischer
b40ce4165d KSE Milestone 2
Note ALL MODULES MUST BE RECOMPILED
make the kernel aware that there are smaller units of scheduling than the
process. (but only allow one thread per process at this time).
This is functionally equivalent to teh previousl -current except
that there is a thread associated with each process.

Sorry john! (your next MFC will be a doosie!)

Reviewed by: peter@freebsd.org, dillon@freebsd.org

X-MFC after:    ha ha ha ha
2001-09-12 08:38:13 +00:00
Dima Dorfman
e692c40ce1 Don't allocate a 512 byte buffer on the stack in snplwrite. It's
probably harmless in this case, since the latter is called on tty
input, which is usually a result of some system call, so we've got
plenty of stack left.  It's still nice to fix these things, though, in
case somebody ever decides this driver is a good example of something
(perhaps "what you probably shouldn't do").
2001-08-16 06:00:57 +00:00
Dima Dorfman
101f105db2 Move the kernel stuff out of snoop.h. It was only there because some
of the snp* functions needed to be called from tty.c, which is no
longer the case.
2001-07-25 14:47:56 +00:00
Dima Dorfman
ac60b28d35 Keep track of all "struct snoop"'s so that snp_modevent can fail with
EBUSY if there's a device still open.
2001-07-18 13:39:43 +00:00
Dima Dorfman
ddf5b79683 Add a line discipline close routine which restores some functionality
I accidently nuked in rev. 1.54.  Also rework the error handling in
snplwrite a little.
2001-06-05 05:07:53 +00:00
Dima Dorfman
f09f49f136 Style and cosmetic cleanups. This driver is now reasonably stlye(9)
compliant.  All the variable definitions and function names are
reasonably consistent, and the functions which should be static (i.e.,
all of them) are.  Other assorted fixes were made.  The majority of
the delta is indentation fixes.

Partially reviewed by:	bde
2001-06-05 05:00:17 +00:00
Dima Dorfman
7fd72392d9 Use the l_nullioctl exported from tty_conf.c rather than rolling our own. 2001-06-04 23:31:21 +00:00
Dima Dorfman
87826386e0 Remove unused includes, use *min() inline functions rather than a
home-grown macro, rewrite a confusing conditional in snpdevtotty(),
and change ibuf to 512 bytes instead of 1024 bytes in dsnwrite().

Reviewed by:	bde
2001-06-03 05:17:39 +00:00
Dima Dorfman
47eaa5f542 Convert this driver to (ab?)use line disciplines to get the input it
needs instead of relying on idiosyncratic hacks in the tty subsystem.
Also add module code since this can now be compiled as a module.

Silence by:	-hackers, -audit
2001-05-22 22:13:14 +00:00
Dima Dorfman
25c7870e5d Make this driver play ball with devfs(5).
Reviewed by:	brian
2001-04-17 20:53:11 +00:00
Poul-Henning Kamp
f83880518b Send the remains (such as I have located) of "block major numbers" to
the bit-bucket.
2001-03-26 12:41:29 +00:00
Peter Wemm
c83abe02aa Remove unused #include "snp.h" 2001-01-29 10:06:22 +00:00
David Malone
7cc0979fd6 Convert more malloc+bzero to malloc+M_ZERO.
Submitted by:	josh@zipperup.org
Submitted by:	Robert Drehmel <robd@gmx.net>
2000-12-08 21:51:06 +00:00
Poul-Henning Kamp
959b7375ed Staticize some malloc M_ instances. 2000-12-08 20:09:00 +00:00
Poul-Henning Kamp
cf9fa8e725 Move suser() and suser_xxx() prototypes and a related #define from
<sys/proc.h> to <sys/systm.h>.

Correctly document the #includes needed in the manpage.

Add one now needed #include of <sys/systm.h>.
Remove the consequent 48 unused #includes of <sys/proc.h>.
2000-10-29 16:06:56 +00:00
Brian Feldman
76e90dbcc9 Unstaticize this driver. You can have as many snoop devices as you can
mknod :)

Clean things up a lot while I'm here.  A lot of KNF changes.
2000-04-02 00:35:37 +00:00
Peter Wemm
e92f63a277 Remove cdevsw_add() - the make_dev() calls are already there.
Don't '#if NSNP > 0' around the thing as it's silly and not required.
config(8) only causes it to be compiled if NSNP is > 0 by definition.
1999-11-18 06:39:47 +00:00
Poul-Henning Kamp
d6a0e38a1b Remove five now unused fields from struct cdevsw. They should never
have been there in the first place.  A GENERIC kernel shrinks almost 1k.

Add a slightly different safetybelt under nostop for tty drivers.

Add some missing FreeBSD tags
1999-09-25 18:24:47 +00:00
Poul-Henning Kamp
ae8e1d08d7 This patch clears the way for removing a number of tty related
fields in struct cdevsw:

        d_stop          moved to struct tty.
        d_reset         already unused.
        d_devtotty      linkage now provided by dev_t->si_tty.

These fields will be removed from struct cdevsw together with
d_params and d_maxio Real Soon Now.

The changes in this patch consist of:

        initialize dev->si_tty in *_open()
        initialize tty->t_stop
        remove devtotty functions
        rename ttpoll to ttypoll
        a few adjustments to these changes in the generic code
        a bump of __FreeBSD_version
        add a couple of FreeBSD tags
1999-09-25 16:21:39 +00:00
Peter Wemm
c3aac50f28 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
Poul-Henning Kamp
9dcbe2404a Convert DEVFS hooks in (most) drivers to make_dev().
Diskslice/label code not yet handled.

Vinum, i4b, alpha, pc98 not dealt with (left to respective Maintainers)

Add the correct hook for devfs to kern_conf.c

The net result of this excercise is that a lot less files depends on DEVFS,
and devtoname() gets more sensible output in many cases.

A few drivers had minor additional cleanups performed relating to cdevsw
registration.

A few drivers don't register a cdevsw{} anymore, but only use make_dev().
1999-08-23 20:59:21 +00:00
Gary Palmer
0625ba2fc3 Add Id strings 1999-06-17 23:42:45 +00:00
Bruce Evans
212dfe6fc7 Fixed a missing userland dev_t to kernel dev_t conversion. 1999-06-17 07:07:55 +00:00
Poul-Henning Kamp
2447bec829 Simplify cdevsw registration.
The cdevsw_add() function now finds the major number(s) in the
struct cdevsw passed to it.  cdevsw_add_generic() is no longer
needed, cdevsw_add() does the same thing.

cdevsw_add() will print an message if the d_maj field looks bogus.

Remove nblkdev and nchrdev variables.  Most places they were used
bogusly.  Instead check a dev_t for validity by seeing if devsw()
or bdevsw() returns NULL.

Move bdevsw() and devsw() functions to kern/kern_conf.c

Bump __FreeBSD_version to 400006

This commit removes:
        72 bogus makedev() calls
        26 bogus SYSINIT functions

if_xe.c bogusly accessed cdevsw[], author/maintainer please fix.

I4b and vinum not changed.  Patches emailed to authors.  LINT
probably broken until they catch up.
1999-05-31 11:29:30 +00:00
Poul-Henning Kamp
4e2f199e0c This commit should be a extensive NO-OP:
Reformat and initialize correctly all "struct cdevsw".

        Initialize the d_maj and d_bmaj fields.

        The d_reset field was not removed, although it is never used.

I used a program to do most of this, so all the files now use the
same consistent format.  Please keep it that way.

Vinum and i4b not modified, patches emailed to respective authors.
1999-05-30 16:53:49 +00:00
Poul-Henning Kamp
784fc12f7b Use NODEV instead of -1 1999-05-10 18:10:08 +00:00
Poul-Henning Kamp
4be2eb8c49 I got tired of seeing all the cdevsw[major(foo)] all over the place.
Made a new (inline) function devsw(dev_t dev) and substituted it.

Changed to the BDEV variant to this format as well: bdevsw(dev_t dev)

DEVFS will eventually benefit from this change too.
1999-05-08 06:40:31 +00:00
Peter Wemm
dfd5dee1b0 Add sufficient braces to keep egcs happy about potentially ambiguous
if/else nesting.
1999-05-06 18:13:11 +00:00
Poul-Henning Kamp
f711d546d2 Suser() simplification:
1:
  s/suser/suser_xxx/

2:
  Add new function: suser(struct proc *), prototyped in <sys/proc.h>.

3:
  s/suser_xxx(\([a-zA-Z0-9_]*\)->p_ucred, \&\1->p_acflag)/suser(\1)/

The remaining suser_xxx() calls will be scrutinized and dealt with
later.

There may be some unneeded #include <sys/cred.h>, but they are left
as an exercise for Bruce.

More changes to the suser() API will come along with the "jail" code.
1999-04-27 11:18:52 +00:00
Matthew Dillon
d254af07a1 Fix warnings in preparation for adding -Wall -Wcast-qual to the
kernel compile
1999-01-27 21:50:00 +00:00
Eivind Eklund
219cbf59f2 KNFize, by bde. 1999-01-10 01:58:29 +00:00
Eivind Eklund
5526d2d920 Split DIAGNOSTIC -> DIAGNOSTIC, INVARIANTS, and INVARIANT_SUPPORT as
discussed on -hackers.

Introduce 'KASSERT(assertion, ("panic message", args))' for simple
check + panic.

Reviewed by:	msmith
1999-01-08 17:31:30 +00:00
Doug Rabson
ecbb00a262 This commit fixes various 64bit portability problems required for
FreeBSD/alpha.  The most significant item is to change the command
argument to ioctl functions from int to u_long.  This change brings us
inline with various other BSD versions.  Driver writers may like to
use (__FreeBSD_version == 300003) to detect this change.

The prototype FreeBSD/alpha machdep will follow in a couple of days
time.
1998-06-07 17:13:14 +00:00
Bruce Evans
e31abede1f Don't depend on "implicit int" or bloat the data section in the
declaration of xxx_devsw_installed.
1998-02-20 13:46:58 +00:00
Eivind Eklund
0b08f5f737 Back out DIAGNOSTIC changes. 1998-02-06 12:14:30 +00:00
Eivind Eklund
47cfdb166d Turn DIAGNOSTIC into a new-style option. 1998-02-04 22:34:03 +00:00