bits under #ifdef _KERNEL but leave definitions for various structures
defined by standards ($PIR table, SMAP entries, etc.) available to
userland.
- Consolidate duplicate SMBIOS table structure definitions in ipmi(4)
and smbios(4) in <machine/pc/bios.h> and make them available to
userland.
MFC after: 2 weeks
If you have a binary on a filesystem which is also mounted over by
nullfs, you could execute the binary from the lower filesystem, or
from the nullfs mount. When executed from lower filesystem, the lower
vnode gets VV_TEXT flag set, and the file cannot be modified while the
binary is active. But, if executed as the nullfs alias, only the
nullfs vnode gets VV_TEXT set, and you still can open the lower vnode
for write.
Add a set of VOPs for the VV_TEXT query, set and clear operations,
which are correctly bypassed to lower vnode.
Tested by: pho (previous version)
MFC after: 2 weeks
number is not exactly specified. When the disk has MBR, also try to read
BSD label after ptable_getpart() call. When the disk has GPT, also set
d_partition to 255. Mostly, this is how it worked before.
mutexes held and the topology lock is an sx lock.
The topology lock was there to protect traversing through the list of providers
of disk's geom, but it seems that disk's geom has always exactly one provider.
Change the code to call g_wither_provider() for this one provider, which is
safe to do without holding the topology lock and assert that there is indeed
only one provider.
Discussed with: ken
MFC after: 1 week
Because fts keeps internal file descriptors open across calls, making such
descriptors close-on-exec helps not only multi-threaded applications but
also single-threaded applications.
In particular, this prevents passing a temporary file descriptor for saving
the current directory to processes created via find -exec.
ngthread properly set the item's depth to 1. In particular, prior to this
change if ng_snd_item failed to acquire a lock on a node, the item's depth
would not be set at all. This fix ensures that the error code from rcvmsg/
rcvdata is properly passed back to the apply callback. For example, this
fixes a bug where an error from rcvmsg/rcvdata would not previously
propagate back to a libnetgraph consumer when the message was queued.
Reviewed by: mav
MFC after: 1 month
Sponsored by: Sandvine Incorporated
The attempt to merge changes from the linux libtirpc caused
rpc.lockd to exit after startup under unclear conditions.
After many hours of selective experiments and inconsistent results
the conclusion is that it's better to just revert everything and
restart in a future time with a much smaller subset of the
changes.
____
MFC after: 3 days
Reported by: David Wolfskill
Tested by: David Wolfskill
The attempt to merge changes from the linux libtirpc caused
rpc.lockd to exit after startup under unclear conditions.
After many hours of selective experiments and inconsistent results
the conclusion is that it's better to just revert everything and
restart in a future time with a much smaller subset of the
changes.
____
MFC after: 3 days
Reported by: David Wolfskill
Tested by: David Wolfskill
Passing an invalid pointer results in undefined behaviour.
The wrappers in libthr access some of the data pointed to by the arguments
in userland, so that an invalid pointer will cause a signal and not an
[EFAULT] error return.
Furthermore, if the [EFAULT] error occurs when the kernel is writing, it is
not a proper error in the sense that the call still commits (changing the
signal disposition or accepting the signal).
MFC after: 1 week
I have to note that POSIX is simply stupid in how it describes O_EXEC/fexecve
and friends. Yes, not only inconsistent, but stupid.
In the open(2) description, O_RDONLY flag is described as:
O_RDONLY Open for reading only.
Taken from:
http://pubs.opengroup.org/onlinepubs/9699919799/functions/open.html
Note "for reading only". Not "for reading or executing"!
In the fexecve(2) description you can find:
The fexecve() function shall fail if:
[EBADF]
The fd argument is not a valid file descriptor open for executing.
Taken from:
http://pubs.opengroup.org/onlinepubs/9699919799/functions/exec.html
As you can see the function shall fail if the file was not open with O_EXEC!
And yet, if you look closer you can find this mess in the exec.html:
Since execute permission is checked by fexecve(), the file description
fd need not have been opened with the O_EXEC flag.
Yes, O_EXEC flag doesn't have to be specified after all. You can open a file
with O_RDONLY and you still be able to fexecve(2) it.
global variables are placed. When a module is loaded by link_elf
linker its variables from "set_vnet" linker set are copied to the
kernel "set_vnet" ("modspace") and all references to these variables
inside the module are relocated accordingly.
The issue is when a module is loaded that has references to global
variables from another, previously loaded module: these references are
not relocated so an invalid address is used when the module tries to
access the variable. The example is V_layer3_chain, defined in ipfw
module and accessed from ipfw_nat.
The same issue is with DPCPU variables, which use "set_pcpu" linker
set.
Fix this making the link_elf linker on a module load recognize
"external" DPCPU/VNET variables defined in the previously loaded
modules and relocate them accordingly. For this set_pcpu_list and
set_vnet_list are used, where the addresses of modules' "set_pcpu" and
"set_vnet" linker sets are stored.
Note, archs that use link_elf_obj (amd64) were not affected by this
issue.
Reviewed by: jhb, julian, zec (initial version)
MFC after: 1 month
of reviewing of r231025.
Unlike other options from this family TCP_KEEPCNT doesn't specify
time interval, but a count, thus parameter supplied doesn't need
to be multiplied by hz.
Reported & tested by: amdmi3
This doesn't specifically fix the issue(s) i'm seeing in this 2GHz
environment (where setting/increasing spur immunity causes OFDM restart
errors to skyrocket through the roof; but leaving it at 0 would leave
the environment cleaner..)
Pointy-hat-to: me, for committing this broken code in the first place.
problematic because some callers to pmap_kextract() expect its
implementation to be lock-less. In particular, uma_dbg_alloc() implicitly
requires this. Otherwise, lock-order reversals occur between pmap locks and
UMA zone locks. So, this change introduces a lock-less implementation of
pmap_kextract().
Disable recursion on the pvh global lock in the new armv6 pmap. While
recursion on this locks occurs in the old arm pmap, it thankfully doesn't
occur in the armv6 pmap.
Tested by: jmg
The reserved space for fmt was exactly sufficient for a two-digit value of
MAXLOGNAME - 1.
PR: bin/171815
Submitted by: Jeremy Huddleston Sequoia
MFC after: 1 week
- Replace do-while statements with void expressions.
- Wrap __asm statements in statement expressions.
- Make the macros function-like:
- Evaluate all arguments exactly once.
- Make sure there's a sequence point between evaluation of the arguments
and the function body. Arguments should be evaluated before any memory
barriers.
- Fix use of __atomic_is_lock_free built-in. It requires the address of
an atomic variable as second argument. Use this built-in on clang as
well because clang's __c11_atomic_is_lock_free only takes the size of the
variable into account.
- In atomic_exchange_explicit put the barrier before instead of after the
__sync_lock_test_and_set call.
Reviewed by: theraven
- Use a dedicated task to handle deferred transmits from the if_transmit
method instead of reusing the existing per-queue interrupt task.
Reusing the per-queue interrupt task could result in both an interrupt
thread and the taskqueue thread trying to handle received packets on a
single queue resulting in out-of-order packet processing and lock
contention.
- Don't define ixgbe_start() at all where if_transmit is used.
Tested by: Vijay Singh
Reviewed by: jfv
MFC after: 2 weeks
is set by specifying '-a <arch>'. (Only supported for i386 on amd64
and powerpc on powerpc64 currently).
- Change how textproc/docproj is installed:
o Attempt to install from pkg(8);
o Fall back to pkg_add(1) if pkg(8) installation is not
successful;
o Fall back to installing from ports as last resort.
- Ensure the script is run by root[1].
- Get OSVERSION from param.h[1].
Provided by: glebius [1]
Reviewed by: nwhitehorn, kensmith
Approved by: kensmith
MFC After: 2 weeks
X-Needs-MFC: r240586, r240587, r240588
When the compiler is clang add c++11 to COMPILER_FEATURES.
When the compiler supports c++11, default to building libc++. This will
not impact the compliation of programs, but will make it easier for
users with clang compiled systems to test libc++ by passing -stdlib=libc++
to their c++ compliations.
Device nodes are in the format /dev/led/isci.busX.portY.locate.
Sponsored by: Intel
Requested by: Paul Maulberger <paul dot maulberger at gmx dot de>
MFC after: 1 week
