we create the pty on the fly when it is first opened.
If you run out of ptys now, just MAKEDEV some more.
This also demonstrate the use of dev_t->si_tty_tty and dev_t->si_drv1
in a device driver.
warnings of the following nature on reloading a kld:
WARNING: "vinum" is usurping "console"'s bmaj
This only applies to cases where "console" is mentioned.
Broken-by: grog
now used in f_ops in place of NULL, and modifications to the files
are more carefully ordered. f_ops should also be set to &badfileops
upon "close" of a file.
This does not fix other problems mentioned in this PR than the first
one.
PR: 11629
Reviewed by: peter
o use suser_xxx rather than suser to support JAIL code.
o KNF comment convention
o use vp->type rather than vaddr.type and eliminate call to
VOP_GETATTR. Bruce says that vp->type is valid at this
point.
Submitted by: bde.
Not fixed:
o return (value)
o Comment needs to be longer and more explicit. It will be after
the advisory.
- device_print_child() either lets the BUS_PRINT_CHILD
method produce the entire device announcement message or
it prints "foo0: not found\n"
Alter sys/kern/subr_bus.c:bus_generic_print_child() to take on
the previous behavior of device_print_child() (printing the
"foo0: <FooDevice 1.1>" bit of the announce message.)
Provide bus_print_child_header() and bus_print_child_footer()
to actually print the output for bus_generic_print_child().
These functions should be used whenever possible (unless you can
just use bus_generic_print_child())
The BUS_PRINT_CHILD method now returns int instead of void.
Modify everything else that defines or uses a BUS_PRINT_CHILD
method to comply with the above changes.
- Devices are 'on' a bus, not 'at' it.
- If a custom BUS_PRINT_CHILD method does the same thing
as bus_generic_print_child(), use bus_generic_print_child()
- Use device_get_nameunit() instead of both
device_get_name() and device_get_unit()
- All BUS_PRINT_CHILD methods return the number of
characters output.
Reviewed by: dfr, peter
macros) to the signal handler, for old-style BSD signal handlers as
the second (int) argument, for SA_SIGINFO signal handlers as
siginfo_t->si_code. This is source-compatible with Solaris, except
that we have no <siginfo.h> (which isn't even mentioned in POSIX
1003.1b).
An rather complete example program is at
http://www3.cons.org/cracauer/freebsd-signal.c
This will be added to the regression tests in src/.
This commit also adds code to disable the (hardware) FPU from
userconfig, so that you can use a software FP emulator on a machine
that has hardware floating point. See LINT.
When creating new processes (or performing exec), the new page
directory is initialized too early. The kernel might grow before
p_vmspace is initialized for the new process. Since pmap_growkernel
doesn't yet know about the new page directory, it isn't updated, and
subsequent use causes a failure.
The fix is (1) to clear p_vmspace early, to stop pmap_growkernel
from stomping on memory, and (2) to defer part of the initialization
of new page directories until p_vmspace is initialized.
PR: kern/12378
Submitted by: tegge
Reviewed by: dfr
also gets the device by st_rdev, which is alright except for the fact that
the sysctl kern.dumpdev passed out a char device. This is a workaround.
Sorry for not committing the fix earlier, before people started having
problems.
vnodes referencing this device.
Details:
cdevsw->d_parms has been removed, the specinfo is available
now (== dev_t) and the driver should modify it directly
when applicable, and the only driver doing so, does so:
vn.c. I am not sure the logic in checking for "<" was right
before, and it looks even less so now.
An intial pool of 50 struct specinfo are depleted during
early boot, after that malloc had better work. It is
likely that fewer than 50 would do.
Hashing is done from udev_t to dev_t with a prime number
remainder hash, experiments show no better hash available
for decent cost (MD5 is only marginally better) The prime
number used should not be close to a power of two, we use
83 for now.
Add new checkalias2() to get around the loss of info from
dev2udev() in bdevvp();
The aliased vnodes are hung on a list straight of the dev_t,
and speclisth[SPECSZ] is unused. The sharing of struct
specinfo means that the v_specnext moves into the vnode
which grows by 4 bytes.
Don't use a VBLK dev_t which doesn't make sense in MFS, now
we hang a dummy cdevsw on B/Cmaj 253 so that things look sane.
Storage overhead from all of this is O(50k).
Bump __FreeBSD_version to 400009
The next step will add the stuff needed so device-drivers can start to
hang things from struct specinfo
the caller to specify a function to be guarded between an entry and exit
barrier, as well as pre- and post-barrier functions.
The primary use for this function is synchronised update of per-cpu private
data. The implementation is almost (but not quite) MI; with a better
mechanism for masking per-CPU interrupts it could probably be hoisted.
Reviewed by: peter (partially)
Only know casualy of this is swapinfo/pstat which should be fixes
the right way: Store the actual pathname in the kernel like mount
does. [Volounteers sought for this task]
The road map from here is roughly: expand struct specinfo into struct
based dev_t. Add dev_t registration facilities for device drivers and
start to use them.
used for timecounting. The possible values are the names of the
physically present harware timecounters ("i8254" and "TSC" on i386's).
Fixed some nearby bitrot in comments in <sys/time.h>.
Reviewed by: phk
1. Printing large quads in small bases overflowed the buffer if
sizeof(u_quad_t) > sizeof(u_long).
2. The sharpflag checks had operator precedence bugs due to excessive
parentheses in all the wrong places.
3. The explicit 0L was bogus in the quad_t comparison and useless in
the long comparision.
4. There was some more bitrot in the comment about ksprintn(). Our
ksprintn() handles bases up to 36 as well as down to 2.
Bruce has other complaints about using %q in kernel and would rather
we went towards using the C9X style %ll and/or %j. (I agree for that
matter, as long as gcc/egcs know how to deal with that.)
Submitted by: bde
I don't know if it was intentional or not, but it would have printed out:
/compat/linux/foo/bar.so: interpreter not found
If it was, then I've broken it. De-constifying the 'interp' variable
or carrying the constness through to elf_load_file() are alternatives.
Alpha believes that %q is for long long, whereas our quad_t and int64_t
is only just a plain long. long long on the alpha is the same size (64
bit) as a long. It was requested, but I have not implemented yet, support
for C9X style %lld - it should be pretty easy though.
Poul-Henning Kamp
Greg Lehey
Brian Feldman
Jordan K. Hubbard
Warner Losh
Bruce Evans
Matthew N. Dodd
Alan Cox
Martin Cracauer
Kazutaka YOKOTA
Doug Rabson
Mike Smith
Peter Wemm
John Polstra
Kris Kennaway