Commit Graph

256 Commits

Author SHA1 Message Date
Poul-Henning Kamp
d3e64681d6 Move the old BSD4.3 tty compatibility from (!BURN_BRIDGES && COMPAT_43)
to COMPAT_43TTY.

Add COMPAT_43TTY to NOTES and */conf/GENERIC

Compile tty_compat.c only under the new option.

Spit out
	#warning "Old BSD tty API used, please upgrade."
if ioctl_compat.h gets #included from userland.
2006-01-10 09:19:10 +00:00
Poul-Henning Kamp
d5f1e0d1ef Deorbit ttymalloc() in preference for ttyalloc() 2006-01-04 09:59:07 +00:00
Poul-Henning Kamp
246b8d448a Use MTX_SYSINIT to set up the tty list mutex. 2006-01-04 08:22:39 +00:00
John Baldwin
2851f51eb1 Revert most of revision 1.235 and fix the problem a different way. We
can't acquire an sx lock in ttyinfo() because ttyinfo() can be called
from interrupt handlers (such as atkbd_intr()).  Instead, go back to
locking the process group while we pick a thread to display information for
and hold that lock until after we drop sched_lock to make sure the
process doesn't exit out from under us.  sched_lock ensures that the
specific thread from that process doesn't go away.  To protect against
the process exiting after we drop the proc lock but before we dereference
it to lookup the pid and p_comm in the call to ttyprintf(), we now copy
the pid and p_comm to local variables while holding the proc lock.

This problem was found by the recently added TD_NO_SLEEPING assertions for
interrupt handlers.

Tested by:	emaste
MFC after:	1 week
2005-10-27 16:47:28 +00:00
Poul-Henning Kamp
5ef5ee7b62 Use new functions to call into drivers methods. 2005-10-16 21:07:31 +00:00
Poul-Henning Kamp
7423b2b40c Make ttyconsolemode() call ttsetwater() so that drivers don't have to. 2005-10-16 20:58:22 +00:00
Poul-Henning Kamp
733634738e Eliminate two unused arguments to ttycreate(). 2005-10-16 20:22:56 +00:00
Suleiman Souhlal
571dcd15e2 Fix the recent panics/LORs/hangs created by my kqueue commit by:
- Introducing the possibility of using locks different than mutexes
for the knlist locking. In order to do this, we add three arguments to
knlist_init() to specify the functions to use to lock, unlock and
check if the lock is owned. If these arguments are NULL, we assume
mtx_lock, mtx_unlock and mtx_owned, respectively.

- Using the vnode lock for the knlist locking, when doing kqueue operations
on a vnode. This way, we don't have to lock the vnode while holding a
mutex, in filt_vfsread.

Reviewed by:	jmg
Approved by:	re (scottl), scottl (mentor override)
Pointyhat to:	ssouhlal
Will be happy:	everyone
2005-07-01 16:28:32 +00:00
Tai-hwa Liang
2d4420789d According to the comment in struct tty, t_modem is optional; hence we should
guard against NULL t_modem entry. Otherwise, driver doesn't have t_modem
callback implemented(such like sys/dev/usb/ucycom.c) would panic when
someone opens the driver's associated tty device.

Reviewed by:	phk, sam (mentor)
2005-04-13 13:56:17 +00:00
Poul-Henning Kamp
4a650cc291 Make (some) serial ports implement the PPS-API again. This change
appearantly fell out during the tty code cleanup.
2005-03-26 20:12:39 +00:00
Peter Wemm
f71692e9be Replace my previous change for 32 bit systems with hz > 169 with Bruce's
simpler one.
2005-03-12 00:13:45 +00:00
Peter Wemm
2afec87508 Make the tty vmin/vtime timeouts work for hz > 169 on 32 bit machines. 2005-03-12 00:10:23 +00:00
Poul-Henning Kamp
3b3f38ed7d Add placeholder mutex argument to new_unrhdr(). 2005-03-07 11:05:47 +00:00
John Baldwin
9e6c867ccc Call tty_close() at the very end of ttyclose() since otherwise NULL
deferences can occur since tty_close() may end up freeing the tty structure
if it drops the last reference to it.

Glanced at by:	phk
2004-12-30 19:24:49 +00:00
Poul-Henning Kamp
118253ca24 fix a misleading sleep identifier. 2004-12-20 21:38:13 +00:00
Diomidis Spinellis
7690a6e4ba Improvements and fixes in the 1.241 commit:
- Have TS_ZOMBIE ttys return POLLHUP instead of POLLERR
- Remove unneeded POLLWRNORM (old bug)
- TS_ZOMBIE ttys will set POLLIN and POLLRDNORM
- Do not call selrecord in TS_ZOMBIE ttys

PR:             kern/73821
Reviewed by:	bde
MFC after:	4 weeks
2004-11-16 17:41:16 +00:00
Diomidis Spinellis
a04b2130a0 Return POLLERR rather than POLLIN/POLLOUT on TS_ZOMBIE ttys.
PR:		kern/73821
MFC after:	4 weeks
2004-11-11 16:10:54 +00:00
Poul-Henning Kamp
51f83da622 Restore TTYDEF_LFLAG to set echo bits. 2004-11-03 19:16:55 +00:00
Poul-Henning Kamp
95bc568977 Add new function ttyinitmode() which sets our systemwide default
modes on a tty structure.

Both the ".init" and the current settings are initialized allowing
the function to be used both at attach and open time.

The function takes an argument to decide if echoing should be enabled.
Echoing should not be enabled for regular physical serial ports
unless they are consoles, in which case they should be configured
by ttyconsolemode() instead.

Use the new function throughout.
2004-10-18 21:51:27 +00:00
Poul-Henning Kamp
33da4e5bd8 Make pty's always come up in echo mode. 2004-10-15 09:03:07 +00:00
Poul-Henning Kamp
fffc55152b Add missing chunk of code to enforce the lock-bits of termios.
This solves the problem where serial consoles suddenly required
DCD to be asserted.

Reported by:	Randy Bush <randy@psg.com>
2004-10-14 18:30:24 +00:00
Poul-Henning Kamp
43c72732aa Don't call driver close unless we have one. 2004-10-12 21:40:41 +00:00
John Baldwin
78c85e8dfc Rework how we store process times in the kernel such that we always store
the raw values including for child process statistics and only compute the
system and user timevals on demand.

- Fix the various kern_wait() syscall wrappers to only pass in a rusage
  pointer if they are going to use the result.
- Add a kern_getrusage() function for the ABI syscalls to use so that they
  don't have to play stackgap games to call getrusage().
- Fix the svr4_sys_times() syscall to just call calcru() to calculate the
  times it needs rather than calling getrusage() twice with associated
  stackgap, etc.
- Add a new rusage_ext structure to store raw time stats such as tick counts
  for user, system, and interrupt time as well as a bintime of the total
  runtime.  A new p_rux field in struct proc replaces the same inline fields
  from struct proc (i.e. p_[isu]ticks, p_[isu]u, and p_runtime).  A new p_crux
  field in struct proc contains the "raw" child time usage statistics.
  ruadd() has been changed to handle adding the associated rusage_ext
  structures as well as the values in rusage.  Effectively, the values in
  rusage_ext replace the ru_utime and ru_stime values in struct rusage.  These
  two fields in struct rusage are no longer used in the kernel.
- calcru() has been split into a static worker function calcru1() that
  calculates appropriate timevals for user and system time as well as updating
  the rux_[isu]u fields of a passed in rusage_ext structure.  calcru() uses a
  copy of the process' p_rux structure to compute the timevals after updating
  the runtime appropriately if any of the threads in that process are
  currently executing.  It also now only locks sched_lock internally while
  doing the rux_runtime fixup.  calcru() now only requires the caller to
  hold the proc lock and calcru1() only requires the proc lock internally.
  calcru() also no longer allows callers to ask for an interrupt timeval
  since none of them actually did.
- calcru() now correctly handles threads executing on other CPUs.
- A new calccru() function computes the child system and user timevals by
  calling calcru1() on p_crux.  Note that this means that any code that wants
  child times must now call this function rather than reading from p_cru
  directly.  This function also requires the proc lock.
- This finishes the locking for rusage and friends so some of the Giant locks
  in exit1() and kern_wait() are now gone.
- The locking in ttyinfo() has been tweaked so that a shared lock of the
  proctree lock is used to protect the process group rather than the process
  group lock.  By holding this lock until the end of the function we now
  ensure that the process/thread that we pick to dump info about will no
  longer vanish while we are trying to output its info to the console.

Submitted by:	bde (mostly)
MFC after:	1 month
2004-10-05 18:51:11 +00:00
Poul-Henning Kamp
0cd3cb9a15 Assign a global unit number for the tty slave devices (init/lock) using
the new subr_unit.c code.

For now assert Giant in ttycreate() and ttyfree().  It is not obvious that
it will ever pay off to lock these with anything else.
2004-09-30 10:38:48 +00:00
Poul-Henning Kamp
cf287576e5 Add functions to create and free the "tty-ness" of a serial port in a
generic way.  This code will allow a similar amount of code to be
removed from most if not all serial port drivers.

	Add generic cdevsw for tty devices.

	Add generic slave cdevsw for init/lock devices.

	Add ttypurge function which wakes up all know generic sleep
	points in the tty code, and calls into the hw-driver if it
	provides a method.

	Add ttycreate function which creates tty device and optionally
	cua device.  In both cases .init/.lock devices are created
	as well.

	Change ttygone() slightly to also call the hw driver provided
	purge routine.

	Add ttyfree() which will purge and destroy the cdevs.

	Add ttyconsole mode for setting console friendly termios
	on a port.
2004-09-28 19:33:49 +00:00
Poul-Henning Kamp
6f077de596 Hold threadcount while throbbing cdevsw in our underlying driver.
This is a bit heavyhanded, and will be simplified once the tty code
learns to properly deal with disappearing hw and drivers.
2004-09-24 08:26:03 +00:00
Poul-Henning Kamp
9e16d66689 Initialize new ttys a bit more.
Check TS_GONE flag for gone-ness.
2004-09-18 17:02:18 +00:00
Poul-Henning Kamp
e8d3e08098 Add ttyopen and ttyclose functions which will do the right stuff for
most if not all of our tty drivers in the future.

Centralizing this stuff enables us to remove about 100 lines of
almost but not quite perfectly copy&paste code from each tty driver.
2004-09-17 11:43:35 +00:00
Poul-Henning Kamp
3e6bf9fb86 Add ttyalloc() which in due time will be the successor to ttymalloc(),
but without the "struct tty *" argument.
2004-09-17 06:13:47 +00:00
John-Mark Gurney
ad3b9257c2 Add locking to the kqueue subsystem. This also makes the kqueue subsystem
a more complete subsystem, and removes the knowlege of how things are
implemented from the drivers.  Include locking around filter ops, so a
module like aio will know when not to be unloaded if there are outstanding
knotes using it's filter ops.

Currently, it uses the MTX_DUPOK even though it is not always safe to
aquire duplicate locks.  Witness currently doesn't support the ability
to discover if a dup lock is ok (in some cases).

Reviewed by:	green, rwatson (both earlier versions)
2004-08-15 06:24:42 +00:00
Poul-Henning Kamp
672c05d49c Preparation commit for the tty cleanups that will follow in the near
future:

rename ttyopen() -> tty_open() and ttyclose() -> tty_close().

We need the ttyopen() and ttyclose() for the new generic cdevsw
functions for tty devices in order to have consistent naming.
2004-07-15 20:47:41 +00:00
Poul-Henning Kamp
911dbd84c7 Introduce ttygone() which indicates that the hardware is detached.
Move dtrwait logic to the generic TTY level.
2004-07-11 15:18:39 +00:00
Poul-Henning Kamp
cb9ea5f4cb Pick the hotchar out of the tty structure instead of caching private
copies.

No current line disciplines have a dynamically changing hotchar, and
expecting to receive anything sensible during a change in ldisc is
insane so no locking of the hotchar field is necessary.
2004-06-26 09:20:07 +00:00
Poul-Henning Kamp
4776c07426 Fix line discipline switching issues: If opening a new ldisc fails,
we have to revert to TTYDISC which we know will successfully open
rather than try the previous ldisc which might also fail to open.

Do not let ldisc implementations muck about with ->t_line, and remove
code which checks for reopens, it should never happen.

Move ldisc->l_hotchar to tty->t_hotchar and have ldisc implementation
initialize it in their open routines.  Reset to zero when we enter
TTYDISC.  ("no" should really be -1 since zero could be a valid
hotchar for certain old european mainframe protocols.)
2004-06-26 08:44:04 +00:00
Poul-Henning Kamp
e77b206f0e Add two new methods to struct tty: One for manipulating BREAK condition
and one for fiddling modem-control signals.

Add generic code to deal with the relevant ioctls if these methods are
present.
2004-06-25 10:24:10 +00:00
Poul-Henning Kamp
075ef10234 #include <sys/serial.h> 2004-06-24 10:32:30 +00:00
Poul-Henning Kamp
98de21b633 Use CTASSERT to enforce the relationship between the new serial port
modem definitions and the old definitions from ioctls.
2004-06-24 10:06:55 +00:00
Poul-Henning Kamp
ec66f15d14 Put the pre FreeBSD-2.x tty compat code under BURN_BRIDGES. 2004-06-21 22:57:16 +00:00
Poul-Henning Kamp
89c9c53da0 Do the dreaded s/dev_t/struct cdev */
Bump __FreeBSD_version accordingly.
2004-06-16 09:47:26 +00:00
Poul-Henning Kamp
1930e303cf Deorbit COMPAT_SUNOS.
We inherited this from the sparc32 port of BSD4.4-Lite1.  We have neither
a sparc32 port nor a SunOS4.x compatibility desire these days.
2004-06-11 11:16:26 +00:00
Poul-Henning Kamp
2195e4207a Reference count struct tty.
Add two new functions: ttyref() and ttyrel().  ttymalloc() creates a struct
tty with a reference count of one.  when ttyrel sees the count go to zero,
struct tty is freed.

Hold references for open ttys and for ttys which are controlling terminal
for sessions.

Until drivers start using ttyrel(), this commit will make no difference.
2004-06-09 09:41:30 +00:00
Poul-Henning Kamp
5df76176f7 Make linesw[] an array of pointers to linedesc instead of an array of
linedisc.
2004-06-07 20:45:45 +00:00
Poul-Henning Kamp
13e84a71e0 Centralize the line discipline optimization determination in a function
called ttyldoptim().

Use this function from all the relevant drivers.

I belive no drivers finger linesw[] directly anymore, paving the way for
locking and refcounting.
2004-06-04 21:55:55 +00:00
Poul-Henning Kamp
fe3ec6224a Manual edits to change linesw[]-frobbing to ttyld_*() calls. 2004-06-04 20:04:52 +00:00
Poul-Henning Kamp
2140d01b27 Machine generated patch which changes linedisc calls from accessing
linesw[] directly to using the ttyld...() functions

The ttyld...() functions ar inline so there is no performance hit.
2004-06-04 16:02:56 +00:00
Poul-Henning Kamp
d1afdc6644 Get rid of ttyregister(). All drivers now use ttymalloc() for struct
tty, so now we stand a chance of implementing refcounting and getting
rid of the damn things again.
2004-06-04 07:17:03 +00:00
Poul-Henning Kamp
3a95025ffc Introduce a ttyioctl() cdevsw default function. 2004-06-01 13:39:02 +00:00
Warner Losh
f36cfd49ad Remove advertising clause from University of California Regent's
license, per letter dated July 22, 1999 and email from Peter Wemm,
Alan Cox and Robert Watson.

Approved by: core, peter, alc, rwatson
2004-04-07 20:46:16 +00:00
Poul-Henning Kamp
8e1f1df080 Device megapatch 3/6:
Add missing D_TTY flags to various drivers.

Complete asserts that dev_t's passed to ttyread(), ttywrite(),
ttypoll() and ttykqwrite() have (d_flags & D_TTY) and a struct tty
pointer.

Make ttyread(), ttywrite(), ttypoll() and ttykqwrite() the default
cdevsw methods for D_TTY drivers and remove the explicit initializations
in various drivers cdevsw structures.
2004-02-21 20:41:11 +00:00
Brian Feldman
a0ed09c0af T -CURRENT DO NOT CRASH UPON ^T K PLZ THX.
Also, use sched_pctcpu() instead of assuming td->td_kse is non-NULL.
2004-02-14 01:30:06 +00:00