Commit Graph

73 Commits

Author SHA1 Message Date
alfred
bf8e8a6e8f 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
tmm
1d05c95940 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
dd
b489d476e4 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
3264aec746 Remove __P. 2002-03-20 02:08:01 +00:00
alfred
2c16fbdd2a Fixes to make select/poll mpsafe.
Problem:
  selwakeup required calling pfind which would cause lock order
  reversals with the allproc_lock and the per-process filedesc lock.
Solution:
  Instead of recording the pid of the select()'ing process into the
  selinfo structure, actually record a pointer to the thread.  To
  avoid dereferencing a bad address all the selinfo structures that
  are in use by a thread are kept in a list hung off the thread
  (protected by sellock).  When a selwakeup occurs the selinfo is
  removed from that threads list, it is also removed on the way out
  of select or poll where the thread will traverse its list removing
  all the selinfos from its own list.

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

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

Proc locks are no longer used in select/poll.

Portions contributed by: davidc
2002-03-14 01:32:30 +00:00
dd
3a71779f4d Make the diagnostics printfs less ugly. 2002-03-11 03:48:32 +00:00
dd
419c6f0b7b 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
dd
ee8055d603 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
dd
c862b766f8 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
rwatson
db445b8143 'error' is now unused, since its only purpose was to catch the
results of suser_td().
2001-11-15 19:42:08 +00:00
rwatson
bbfaae808a Temporarily disable unloading, as it appears to be broken (read: causes
panics)
2001-11-15 19:41:14 +00:00
rwatson
91a95fc832 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
5596676e6c 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
dd
4566001b5c 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
dd
1caa1807e0 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
dd
f582e5317a 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
dd
1c7d10ac21 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
dd
c35e39a5cb 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
dd
b646de742c Use the l_nullioctl exported from tty_conf.c rather than rolling our own. 2001-06-04 23:31:21 +00:00
dd
eaa7d6fe18 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
dd
3ad1483a6b 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
dd
c50aedd1ac Make this driver play ball with devfs(5).
Reviewed by:	brian
2001-04-17 20:53:11 +00:00
phk
c47745e977 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
10b1794678 Remove unused #include "snp.h" 2001-01-29 10:06:22 +00:00
dwmalone
dd75d1d73b 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
phk
c3f2ee9700 Staticize some malloc M_ instances. 2000-12-08 20:09:00 +00:00
phk
ff5cdfae2d 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
green
0589fa1888 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
f061e9c46f 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
phk
e9e0512210 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
phk
a2c68c62db 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
3b842d34e8 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
phk
663cbe4fc2 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
gpalmer
9fb66a410e Add Id strings 1999-06-17 23:42:45 +00:00
bde
1fff825331 Fixed a missing userland dev_t to kernel dev_t conversion. 1999-06-17 07:07:55 +00:00
phk
6a5dc97620 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
phk
7e4a9dced9 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
phk
563f9088be Use NODEV instead of -1 1999-05-10 18:10:08 +00:00
phk
500e41bd71 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
73556bfee1 Add sufficient braces to keep egcs happy about potentially ambiguous
if/else nesting.
1999-05-06 18:13:11 +00:00
phk
16e3fbd2c1 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
dillon
a40e0249d4 Fix warnings in preparation for adding -Wall -Wcast-qual to the
kernel compile
1999-01-27 21:50:00 +00:00
eivind
89e1199534 KNFize, by bde. 1999-01-10 01:58:29 +00:00
eivind
a8dc66f457 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
dfr
1d5f38ac22 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
bde
bfefd71bbf 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
4547a09753 Back out DIAGNOSTIC changes. 1998-02-06 12:14:30 +00:00
eivind
c552a9a1c3 Turn DIAGNOSTIC into a new-style option. 1998-02-04 22:34:03 +00:00
eivind
71ddd31390 Make all file-system (MFS, FFS, NFS, LFS, DEVFS) related option new-style.
This introduce an xxxFS_BOOT for each of the rootable filesystems.
(Presently not required, but encouraged to allow a smooth move of option *FS
to opt_dontuse.h later.)

LFS is temporarily disabled, and will be re-enabled tomorrow.
1998-01-24 02:54:56 +00:00
eivind
01dd6091ed Make COMPAT_43 and COMPAT_SUNOS new-style options. 1997-12-16 17:40:42 +00:00