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bc093719ca
freebsd-dev/lib/libc/sys
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Ed Schouten bc093719ca Integrate the new MPSAFE TTY layer to the FreeBSD operating system. 
The last half year I've been working on a replacement TTY layer for the
FreeBSD kernel. The new TTY layer was designed to improve the following:

- Improved driver model:

  The old TTY layer has a driver model that is not abstract enough to
  make it friendly to use. A good example is the output path, where the
  device drivers directly access the output buffers. This means that an
  in-kernel PPP implementation must always convert network buffers into
  TTY buffers.

  If a PPP implementation would be built on top of the new TTY layer
  (still needs a hooks layer, though), it would allow the PPP
  implementation to directly hand the data to the TTY driver.

- Improved hotplugging:

  With the old TTY layer, it isn't entirely safe to destroy TTY's from
  the system. This implementation has a two-step destructing design,
  where the driver first abandons the TTY. After all threads have left
  the TTY, the TTY layer calls a routine in the driver, which can be
  used to free resources (unit numbers, etc).

  The pts(4) driver also implements this feature, which means
  posix_openpt() will now return PTY's that are created on the fly.

- Improved performance:

  One of the major improvements is the per-TTY mutex, which is expected
  to improve scalability when compared to the old Giant locking.
  Another change is the unbuffered copying to userspace, which is both
  used on TTY device nodes and PTY masters.

Upgrading should be quite straightforward. Unlike previous versions,
existing kernel configuration files do not need to be changed, except
when they reference device drivers that are listed in UPDATING.

Obtained from:		//depot/projects/mpsafetty/...
Approved by:		philip (ex-mentor)
Discussed:		on the lists, at BSDCan, at the DevSummit
Sponsored by:		Snow B.V., the Netherlands
dcons(4) fixed by:	kan
2008-08-20 08:31:58 +00:00
..
__error.c Remove 3rd clause, renumber, ok per email 2007-01-12 07:31:30 +00:00
_exit.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
abort2.2 Fix markup, language, function prototype, and example code. 2006-09-30 10:24:00 +00:00
accept.2 Add Xr to getsockname(2) 2008-06-20 14:47:06 +00:00
access.2 Man pages for the openat(2), fexecve(2) and related syscalls. 2008-04-16 13:03:12 +00:00
acct.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
adjtime.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
aio_cancel.2 style(9) cleanup 2008-04-03 02:41:54 +00:00
aio_error.2 Fix typo 2006-09-26 09:47:46 +00:00
aio_read.2 Sort .Xr by section number. 2005-12-13 13:43:35 +00:00
aio_return.2 Reword previous delta a little bit. 2006-10-07 10:49:20 +00:00
aio_suspend.2 style(9) cleanup 2008-04-03 02:41:54 +00:00
aio_waitcomplete.2
aio_write.2 Sort .Xr by section number. 2005-12-13 13:43:35 +00:00
bind.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
brk.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
chdir.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
chflags.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
chmod.2 Man pages for the openat(2), fexecve(2) and related syscalls. 2008-04-16 13:03:12 +00:00
chown.2 Man pages for the openat(2), fexecve(2) and related syscalls. 2008-04-16 13:03:12 +00:00
chroot.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
clock_gettime.2 Add missing words. 2008-02-25 13:03:18 +00:00
close.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
connect.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
cpuset_getaffinity.2 Document that you must include <sys/param.h> before <sys/cpuset.h>. 2008-04-20 15:51:56 +00:00
cpuset.2 Document that you must include <sys/param.h> before <sys/cpuset.h>. 2008-04-20 15:51:56 +00:00
dup.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
execve.2 Man pages for the openat(2), fexecve(2) and related syscalls. 2008-04-16 13:03:12 +00:00
extattr_get_file.2 Update this manual page to describe the extattr_list_file() and the 2008-01-29 18:15:38 +00:00
fcntl.2 Add the new kernel-mode NFS Lock Manager. To use it instead of the 2008-03-26 15:23:12 +00:00
fcntl.c Call the fcntl compatiblity wrapper from the thread library fcntl wrappers 2008-05-30 14:47:42 +00:00
fhopen.2 Use 'manual page' instead of 'man page' for consistency. 2005-06-30 13:18:15 +00:00
flock.2 Xref flopen.3 which references this manual page. 2008-01-22 15:56:48 +00:00
fork.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
fsync.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
ftruncate.c Change the C wrappers for mmap/lseek/pread/pwrite/truncate/ftruncate to 2007-07-04 23:27:38 +00:00
getdirentries.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
getdtablesize.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
getfh.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
getfsstat.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
getgid.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
getgroups.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
getitimer.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
getlogin.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
getpeername.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
getpgrp.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
getpid.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
getpriority.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
getrlimit.2 Integrate the new MPSAFE TTY layer to the FreeBSD operating system. 2008-08-20 08:31:58 +00:00
getrusage.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
getsid.2
getsockname.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
getsockopt.2 Bring missing getsockopt(2) options: SO_LABEL SO_PEERLABEL SO_LISTENQLIMIT 2008-06-12 22:58:35 +00:00
gettimeofday.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
getuid.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
intro.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
ioctl.2 Take a sentence into the present by removing a reference to FreeBSD 3.0. 2007-07-14 19:23:29 +00:00
issetugid.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
jail.2 Add EAGAIN to the ERRORS list, as found in kern_jail.c. 2008-08-03 21:56:58 +00:00
kenv.2 Use 'manual page' instead of 'man page' for consistency. 2005-06-30 13:18:15 +00:00
kill.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
kldfind.2
kldfirstmod.2
kldload.2 Document that kldload(2) can also return EEXIST. 2003-06-03 12:29:34 +00:00
kldnext.2 Markup fixes. 2006-09-17 21:27:35 +00:00
kldstat.2 Add a BUGS section to note that mount/chroot changes since 2007-10-22 21:49:39 +00:00
kldsym.2
kldunload.2 Fix bugs in previous revision (missing comma, misspelled syscall name). 2008-03-13 10:33:24 +00:00
kqueue.2 We've been able to support EVFILT_VNODE filtering on non-UFS 2007-09-07 13:10:09 +00:00
kse.2 New sentence -> new line. While here, fix apostrophe abuse. 2007-02-14 07:38:39 +00:00
ktrace.2 remove whitespace bug (8 spaces into one tab) 2008-08-02 13:49:12 +00:00
link.2 Man pages for the openat(2), fexecve(2) and related syscalls. 2008-04-16 13:03:12 +00:00
lio_listio.2 Add missing word "returns." 2006-10-07 05:13:32 +00:00
listen.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
lseek.2 Bump date. 2007-04-05 21:17:52 +00:00
lseek.c Change the C wrappers for mmap/lseek/pread/pwrite/truncate/ftruncate to 2007-07-04 23:27:38 +00:00
madvise.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
Makefile.inc Integrate the new MPSAFE TTY layer to the FreeBSD operating system. 2008-08-20 08:31:58 +00:00
mincore.2 Add support to mincore for detecting whether a page is part of a 2008-03-28 04:29:27 +00:00
minherit.2 Bump manpage date, missed during the last change. 2007-10-30 15:28:43 +00:00
mkdir.2 - Forgot to bump a date after last change 2008-06-30 08:46:09 +00:00
mkfifo.2 Man pages for the openat(2), fexecve(2) and related syscalls. 2008-04-16 13:03:12 +00:00
mknod.2 Man pages for the openat(2), fexecve(2) and related syscalls. 2008-04-16 13:03:12 +00:00
mlock.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
mlockall.2 Fixed markup. 2004-07-03 23:14:34 +00:00
mmap.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
mmap.c Change the C wrappers for mmap/lseek/pread/pwrite/truncate/ftruncate to 2007-07-04 23:27:38 +00:00
modfind.2
modnext.2 Expand *n't contractions. 2005-02-13 22:25:33 +00:00
modstat.2 Update the definition of modspecific structure 2008-07-15 10:06:37 +00:00
mount.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
mprotect.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
mq_close.2 Use the easily-greppable copyright notice template from 2008-02-29 17:48:25 +00:00
mq_getattr.2 Use the easily-greppable copyright notice template from 2008-02-29 17:48:25 +00:00
mq_notify.2 Use the easily-greppable copyright notice template from 2008-02-29 17:48:25 +00:00
mq_open.2 Use the easily-greppable copyright notice template from 2008-02-29 17:48:25 +00:00
mq_receive.2 Use the easily-greppable copyright notice template from 2008-02-29 17:48:25 +00:00
mq_send.2 Use the easily-greppable copyright notice template from 2008-02-29 17:48:25 +00:00
mq_setattr.2 Use the easily-greppable copyright notice template from 2008-02-29 17:48:25 +00:00
msync.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
munmap.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
nanosleep.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
nfssvc.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
ntp_adjtime.2 Use better manuals for these ntp system calls. These were replaced by 2007-09-15 14:33:55 +00:00
open.2 Man pages for the openat(2), fexecve(2) and related syscalls. 2008-04-16 13:03:12 +00:00
pathconf.2 Bump date. 2007-04-05 21:17:52 +00:00
pipe.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
poll.2 Sort sections. 2005-01-20 09:17:07 +00:00
posix_openpt.2 Integrate the new MPSAFE TTY layer to the FreeBSD operating system. 2008-08-20 08:31:58 +00:00
pread.c Change the C wrappers for mmap/lseek/pread/pwrite/truncate/ftruncate to 2007-07-04 23:27:38 +00:00
profil.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
ptrace.2 Belatedly bump Dd for my recent changes. 2007-04-11 20:31:06 +00:00
pwrite.c Change the C wrappers for mmap/lseek/pread/pwrite/truncate/ftruncate to 2007-07-04 23:27:38 +00:00
quotactl.2 Docment the acceptable values for the id parameter. 2007-02-01 02:31:02 +00:00
read.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
readlink.2 Man pages for the openat(2), fexecve(2) and related syscalls. 2008-04-16 13:03:12 +00:00
reboot.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
recv.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
rename.2 Man pages for the openat(2), fexecve(2) and related syscalls. 2008-04-16 13:03:12 +00:00
revoke.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
rfork.2 Document RFTHREAD 2007-05-14 13:58:54 +00:00
rmdir.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
rtprio.2 Sort sections. 2005-01-20 09:17:07 +00:00
sched_get_priority_max.2 Mechanically kill hard sentence breaks. 2004-07-02 23:52:20 +00:00
sched_setparam.2 Sort SEE ALSO references (in dictionary order, ignoring case). 2004-07-04 20:55:50 +00:00
sched_setscheduler.2 Mechanically kill hard sentence breaks. 2004-07-02 23:52:20 +00:00
sched_yield.2 Mechanically kill hard sentence breaks. 2004-07-02 23:52:20 +00:00
sctp_generic_recvmsg.2 Correct minor typos in SCTP man pages. 2008-04-28 16:57:56 +00:00
sctp_generic_sendmsg.2 Remove extraneous empty lines, to fix mdoc warnings. 2007-10-30 15:36:40 +00:00
sctp_peeloff.2 Correct minor typos in SCTP man pages. 2008-04-28 16:57:56 +00:00
select.2 Add note about other systems. 2007-12-19 03:33:13 +00:00
semctl.2 Eliminate macro calls inside literal displays. 2005-01-15 12:28:01 +00:00
semget.2 Expand contractions. 2005-02-15 09:27:00 +00:00
semop.2 Eliminate macro calls inside literal displays. 2005-01-15 12:28:01 +00:00
send.2 Remove the MSG_PEEK flag from the documentation of the send(2) syscall - 2007-04-27 10:28:30 +00:00
sendfile.2 Give sendfile(2) a SF_SYNC flag which makes it wait until all mbufs 2008-02-03 15:54:41 +00:00
setfib.2 Add prototype defination for setfib(2) to sys/socket.h. 2008-08-08 22:40:04 +00:00
setgroups.2 Make it clearer that privilege is needed to reduce as well as 2008-06-16 14:50:21 +00:00
setpgid.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
setregid.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
setresuid.2
setreuid.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
setsid.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
setuid.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
shm_open.2 Add a new file descriptor type for IPC shared memory objects and use it to 2008-01-08 21:58:16 +00:00
shmat.2 Mechanically kill hard sentence breaks. 2004-07-02 23:52:20 +00:00
shmctl.2 Expand contractions. 2005-02-13 23:45:54 +00:00
shmget.2 Mechanically kill hard sentence breaks. 2004-07-02 23:52:20 +00:00
shutdown.2 Fix license. Clause 4 is still required (UCB materiel). 2007-03-07 13:38:11 +00:00
sigaction.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
sigaltstack.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
sigpending.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
sigprocmask.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
sigqueue.2 Markup fixes. 2006-09-17 21:27:35 +00:00
sigreturn.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
sigstack.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
sigsuspend.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
sigwait.2 -mdoc sweep. 2005-11-17 13:00:00 +00:00
sigwaitinfo.2 Sort .Xr by section number. 2005-12-13 13:43:35 +00:00
socket.2 Add EPERM to the ERRORS section. 2008-08-04 22:22:17 +00:00
socketpair.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
stack_protector.c Expose __stack_chk_fail_local() so -fstack-protector-all works. 2007-06-05 08:24:34 +00:00
stat.2 Man pages for the openat(2), fexecve(2) and related syscalls. 2008-04-16 13:03:12 +00:00
statfs.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
swapon.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
Symbol.map Integrate the new MPSAFE TTY layer to the FreeBSD operating system. 2008-08-20 08:31:58 +00:00
symlink.2 Man pages for the openat(2), fexecve(2) and related syscalls. 2008-04-16 13:03:12 +00:00
sync.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
sysarch.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
syscall.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
timer_create.2 Fix library names. 2007-06-18 01:50:03 +00:00
timer_delete.2 Fix library names. 2007-06-18 01:50:03 +00:00
timer_settime.2 Fix library names. 2007-06-18 01:50:03 +00:00
truncate.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
truncate.c Change the C wrappers for mmap/lseek/pread/pwrite/truncate/ftruncate to 2007-07-04 23:27:38 +00:00
umask.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
undelete.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
unlink.2 Man pages for the openat(2), fexecve(2) and related syscalls. 2008-04-16 13:03:12 +00:00
utimes.2 Man pages for the openat(2), fexecve(2) and related syscalls. 2008-04-16 13:03:12 +00:00
utrace.2 Fixed markup. 2004-07-03 23:14:34 +00:00
uuidgen.2 Fix all the spelling mistakes I could find in the man pages for words 2005-07-31 03:30:48 +00:00
vfork.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
wait.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00
write.2 Per Regents of the University of Calfornia letter, remove advertising 2007-01-09 00:28:16 +00:00