The uminor() and umajor() functions have the same use in kernel space as
the minor() and major() functions in userspace. If we ever get rid of
the minor() function in kernel space, we could decide to just expose
minor() and major() to kernel space, making uminor() and umajor()
redundant.
There are two reasons why we want to have uminor() and umajor() in
<sys/types.h>:
- Having them close together prevents them from diverting. Even though
it's unlikely the definitions will change, it's a good habit to have
them at the same place.
- They don't really belong in kern_conf.c. kern_conf.c has been
liberated from dealing with device major and minor number handling.
The device_ids(9) manpage now lists the wrong #include's, because it
should only list <sys/types.h> now. I'm leaving it as it is now, because
I wonder if we should document them anyway. We're probably better off
documenting minor(3) and major(3).
After I removed all the unit2minor()/minor2unit() calls from the kernel
yesterday, I realised calling minor() everywhere is quite confusing.
Character devices now only have the ability to store a unit number, not
a minor number. Remove the confusion by using dev2unit() everywhere.
This commit could also be considered as a bug fix. A lot of drivers call
minor(), while they should actually be calling dev2unit(). In -CURRENT
this isn't a problem, but it turns out we never had any problem reports
related to that issue in the past. I suspect not many people connect
more than 256 pieces of the same hardware.
Reviewed by: kib
I've had some reports in the past that opening an already opened TTY
through, for example, /dev/tty can fail with random error codes. Looking
at ttydev_open(), I can see there is a way `error' is returned without
initialising it. Even though I haven't had any confirmation this fixes
the bug, I'll fix it anyway.
Reported by: Andrzej Tobola <ato iem pw edu pl>
getosreldate() in assembler source files. We still get the
definition of __FreeBSD_version this way, because it's
outside the standard multiple-inclusion protection trick.
All this is specific to ia64.
filedescriptor into it. Make sure that td_fpop is NULL when calling
d_mmap from dev_pager_getpages().
Change guards against td_fpop field being non-NULL with private state
for another device, and against sudden clearing the td_fpop. This
could occur when either a driver method calls another driver through
the filedescriptor operation, or a page fault happen while driver is
writing to a memory backed by another driver.
Noted by: rwatson
Tested by: rnoland
MFC after: 3 days
To prevent any further confusion about device minor and unit numbers,
we'd better just refer to device unit numbers. Many people still think
the numbers we show inside devfs have any relation to the numbers passed
to make_dev(9), which is not the case.
Discussed with: kib
When I changed kern_conf.c three months ago I made device unit numbers
equal to (unneeded) device minor numbers. We used to require
bitshifting, because there were eight bits in the middle that were
reserved for a device major number. Not very long after I turned
dev2unit(), minor(), unit2minor() and minor2unit() into macro's.
The unit2minor() and minor2unit() macro's were no-ops.
We'd better not remove these four macro's from the kernel, because there
is a lot of (external) code that may still depend on them. For now it's
harmless to remove all invocations of unit2minor() and minor2unit().
Reviewed by: kib
Thanks goes to ITE who provided docs and feedback and made this possible.
Minor fixups to the Intel ICH code for bugs found while doing this.
(ITE8213 is very semilar to an Intel ICH)
MFC after: 1 week
for quite some time now. While I'm not sure if it'll break IA64 again,
this way doesn't cause problems with my builds of XFree86/Xorg and the way
they #include <osreldate.h> via cpp in the imake system.
includes syscall32_{de,}register() routines as well as a module handler
and wrapper macros similar to the support for native syscalls in
<sys/sysent.h>.
MFC after: 1 month
- Instead of using a syscall slot (370) just to get a function prototype
for lkmressys(), add an explicit function prototype to <sys/sysent.h>.
This also removes unused special case checks for 'lkmressys' from
makesyscalls.sh.
- Instead of having magic logic in makesyscalls.sh to only generate a
function prototype the first time 'lkmnosys' is seen, make 'NODEF'
always not generate a function prototype and include an explicit
prototype for 'lkmnosys' in <sys/sysent.h>.
- As a result of the fix in (2), update the LKM syscall entries in
the freebsd32 syscall table to use 'lkmnosys' rather than 'nosys'.
- Use NOPROTO for the __syscall() entry (198) in the native ABI. This
avoids the need for magic logic in makesyscalls.h to only generate
a function prototype the first time 'nosys' is encountered.
called without an inpcb pointer despite holding the tcbinfo global
lock, which lead to a deadlock or panic when ipfw tried to further
acquire it recursively.
Reported by: Stefan Ehmann <shoesoft at gmx dot net>
MFC after: 3 days
variable wait routines. DROP_GIANT() already manages that state in the
Giant interlock case.
- Assert that Giant is held when it is passed as a sleep interlock.
the unlocked route caching in if_stf. Add a mutex that protects
access to cached route. This seemed to fix problems for Pekka Savola.
Nick Sayer had similar problems, and in his case completly disabling
the route cache seemed to help. Add a sysctl net.link.stf.route_cache
that can be used to turn off route caching in if_stf.
PR: 122283
MFC after: 2 weeks
Tested by: Pekka Savola, Nick Sayer.
Kick the device into the right mode if it comes up as a flash-disk.
Set the buffers to a sensible 1024 bytes instead of a far too small
default.
Don't attempt to change speed, baud, parity and such, the device does
not understand it.
messages from the network. We already replace malformatted timestamps
and this option lets us replace timestamps that are correctly formatted
but wrong.
PR: 120891
Submitted by: Thomas Vogt <thomas@bsdunix.ch>
MFC after: 1 week
have hardware ram buffer. The silicon bug seem to be triggered by
pause frames if receive buffer is not aligned on FIFO word(8 bytes).
To workaround the issue, make sure to align Rx buffers on 8 bytes.
Unfortunately this workaround requires yet another Rx fixup for
strict alignment architecture machines to align IP header.
For newer hardwares that lacks ram buffer may not have this bug so
check number of available ram buffer size to see the existence of
ram buffer.
Reported by: Ian Freislich (ianf <at> clue dot co dot za), das
Tested by: Ian Freislich (ianf <at> clue dot co dot za)
