dim [Sat, 15 Apr 2017 22:34:22 +0000 (22:34 +0000)]
Pull in r300404 from upstream llvm trunk (by me):
Use correct registers for "A" inline asm constraint
Summary:
In PR32594, inline assembly using the 'A' constraint on x86_64 causes
llvm to crash with a "Cannot select" stack trace. This is because
`X86TargetLowering::getRegForInlineAsmConstraint` hardcodes that 'A'
means the EAX and EDX registers.
However, on x86_64 it means the RAX and RDX registers, and on 16-bit
x86 (ia16?) it means the old AX and DX registers.
Add new register classes in `X86RegisterInfo.td` to support these
cases, and amend the logic in `getRegForInlineAsmConstraint` to cope
with different subtargets. Also add a test case, derived from
PR32594.
Add a 10x16 mouse cursor and use it in all graphics (strictly, pixel)
modes if the font size is >= 14.
This is the X cursor XC_left_ptr (#68) (glyph #45 in an X cursor font).
Also found in vt. The old 9x13 cursor is the 10x16 one trimmed not very
well.
8x8 fonts need a smaller cursor instead of a larger one, except when
the pixel size is small. Text mode is still limited to width and height
1 more than the font (so the 9x13 is already 4 pixels too high for it).
Structure the mouse cursor data so that it is easier to switch, and
access it via pointers (still to only 1 instance, now with a less
generic name).
Restructure the "and" and "or" masks as border and interior masks
(where the "and" mask was for the union of the border and the interior).
"and" and "or" were only a detail in a not very good implementation,
and after fixing that the union was only used to calculate the border
at runtime.
Use the metric data in more places to clip to active pixels earlier.
Fix another logic bug that came out of recent syslogd refactoring and exposed by
the r316874: don't call shutdown(2) on all sockets, but only net ones, which seems
to be the behaviour existed before that refactoring. Also don't call listen(2)
in datagram sockets and fix misplaced debug messages while I am here.
cxgbe: Add a tunable to configure the SGE time scaler, which is
available starting with T6. The values in the timer holdoff registers
are multiplied by the scaling factor before use.
dev.<nexus>.<n>.holdoff_timers shows the final values of the
timers in microseconds.
I was swayed a little too quickly when I saw the wiki page discussing
kB vs KiB. Switch back as none of the code in base openly uses
IEC units via humanize_number(3) (which was my next step), and there's
a large degree of dislike with IEC vs more SI-like units.
Since shutdown(2) on datagram socket is no longer a NOP after rev 316874
don't bother to select/recv on that socket. This prevents syslogd(8)
from spinning endlessly when started with the -s option (default).
savecore: fix space calculation with respect to `minfree` in check_space(..)
- Use strtoll(3) instead of atoi(3), because atoi(3) limits the
representable data to INT_MAX. Check the values received from
strtoll(3), trimming trailing whitespace off the end to maintain
POLA.
- Use `KiB` instead of `kB` when describing free space, total space,
etc. I am now fully aware of `KiB` being the IEC standard for 1024
bytes and `kB` being the IEC standard for 1000 bytes.
- Store available number of KiB in `available` so it can be more
easily queried and compared to ensure that there are enough KiB to
store the dump image on disk.
- Print out the reserved space on disk, per `minfree`, so end-users
can troubleshoot why check_space(..) is reporting that there isn't
enough free space.
MFC after: 7 weeks
Reviewed by: Anton Rang <rang@acm.com> (earlier diff), cem (earlier diff)
Tested with: positive/negative cases (see review); make tinderbox
Sponsored by: Dell EMC Isilon
Differential Revision: D10379
Restore ability to shutdown DGRAM sockets, still forcing ENOTCONN to be returned
by the shutdown(2) system call. This ability has been lost as part of the svn
revision 285910.
Don't set the mirror GEOM softc to NULL in g_mirror_destroy().
At this point we have not rendezvous'ed with the mirror worker thread, and
I/O may still be in flight. Various I/O completion paths expect to be able
to obtain a reference to the mirror softc from the GEOM, so setting it to
NULL may result in various NULL pointer dereferences if the mirror is
stopped with -f or the kernel is shut down while a mirror is
synchronizing. The worker thread will clear the softc pointer before
exiting.
Check for a provider error before enqueuing mirror I/O.
We are otherwise susceptible to a race with a concurrent teardown of the
mirror provider, causing the I/O to be left uncompleted after the mirror
started withering.
Adjust shifting so that cursor widths up to 17 (was 9) work in vga planar
mode.
Direct mode always supported widths up to 32, except for its hard-coded
16s matching the pixmap size. Text mode is still limited to 9 its 2x2
character cell method and missing adjustments for the gap between
characters, if any.
Cursor heights can be almost anything in graphics modes.
Stop mirror synchronization before draining the I/O queue.
Regular I/O requests may be blocked by concurrent synchronization requests
targeted to the same LBAs, in which case they are moved to a holding queue
until the conflicting I/O completes. We therefore want to stop
synchronization before completing pending I/O in g_mirror_destroy_provider()
since this ensures that blocked I/O requests are completed as well.
7900 zdb shouldn't print the path of a znode at verbosity < 5
Reviewed by: Paul Dagnelie <pcd@delphix.com>
Reviewed by: Matt Ahrens <mahrens@delphix.com>
Approved by: Dan McDonald <danmcd@omniti.com>
Author: Alan Somers <asomers@freebsd.org>
While the former name is easier to read, the "_flags" suffix has a special
meaning for loader(8) and, thus, it was impossible to set the knob via
loader.conf(5). The loader interpreted the setting as flags that should
be passed to a kernel module named "vfs.zfs.debug".
In fsck_ffs pass1, prevent the inosused variable from wrapping.
The loop that scans the used inode map when soft updates is in use
assumes that the inosused variable is signed. However, ino_t is
unsigned, so the loop invariant is incorrect and the check for
inosused wrapping to < 0 can never be true.
Instead of checking for wrap after the fact just prevent it from
happening in the first place.
Optimize drawing of the mouse cursor in vga planar mode almost as
much as possible, by avoiding null ANDs and ORs to the frame buffer.
Mouse cursors are fairly sparse, especially for their frame. Pixels
are written in groups of 8 in planar mode and the per-group sparseness
is not as large, but it still averages about 40% with the current
9x13 mouse cursor. The average drawing time is reduced by about this
amount (from 22 usec constant to 12.5 usec average on Haswell).
This optimization is relatively larger with larger cursors. Width 10
requires 6 frame buffer accesses per line instead of 4 if not done
sparsely, but rarely more than 4 if done sparsely.
The "cred" argument of ncl_flush() is unused and it was confusing to have
the code passing in NULL for this argument in some cases. This patch deletes
this argument.
There is no semantic change because of this patch.
Further unobfuscate the method of drawing the mouse cursor in vga planar
mode.
Don't manually unroll the 2 inner loops. On Haswell, doing so gave a
speedup of about 0.5% (about 4 cycles per iteration out of 1400), but
hard-coded a limit of width 9 and made better better optimizations
harder to see. gcc-4.2.1 -O does the unrolling anyway, unless tricked
with a volatile hack. gcc's unrolling is not very good and gives a
a speedup of about half as much (about 2 cycles per iteration). (All
timing on i386.)
Manual unrolling was only feasible because the inner loop only iterates
once or twice. Usually twice, but a dynamic check is needed to decide,
and was not moved from the second-innermost loop manually or by gcc.
This commit basically adds another dynamic check in the inner loop.
Cursor widths of 10-17 require 3 iterations in the inner loop and this
is not so easy to unroll -- even gcc stops at 2.
The rule field in the ipfw_dyn_rule structure is used as storage
to pass rule number and rule set to userland. In r272840 the kernel
internal rule representation was changed and the rulenum field of
struct ip_fw_rule got the type uint32_t, but userlevel representation
still have the type uint16_t. To not overflow the size of pointer
on the systems with 32-bit pointer size use separate variable to
copy rulenum and set.
Rework r316770 to make it protocol independent and general, like we
do for streaming sockets.
And do more cleanup in the sbappendaddr_locked_internal() to prevent
leak information from existing mbuf to the one, that will be possible
created later by netgraph.
Keep state incorrectly assumes keep frags. This is counter to the
ipfilter man pages. This also currently restricts keep frags to only when
keep state is used, which is redundant because keep state currently
assumes keep frags. This commit fixes this.
To the user this change means that to maintain the current behaviour
one must add keep frags to any ipfilter keep state rule (as documented
in the man pages).
This patch also allows the flexability to specify and use keep frags
separate from keep state, as documented in an example in ipf.conf.5,
instead of the currently broken behaviour.
Fix a use after free panic in ipfilter's fragment processing.
Memory is malloc'd, then a search for a match in the fragment table
is made and if the fragment matches, the wrong fragment table is
freed, causing a use after free panic. This commit fixes this.
A symptom of the problem is a kernel page fault in bcopy() called by
ipf_frag_lookup() at line 715 in ip_frag.c. Another symptom is a
kernel page fault in ipf_frag_delete() when called by ipf_frag_expire()
via ipf_slowtimer().
Remove unnecessary check aginst NULL. txp_ext_command() with
TXP_CMD_WAIT argument allocates a response buffer. If the allocation
fails, txp_ext_command() returns an error and it's handed in caller.
cem [Fri, 14 Apr 2017 00:14:40 +0000 (00:14 +0000)]
restore(8): Prevent some heap overflows
The environment variable TMPDIR was copied unchecked into a fixed-size heap
buffer. Use a length-limiting snprintf in place of ordinary sprintf to
prevent the overflow. Long TMPDIR variables can still cause odd truncated
filenames, which may be undesirable.
cem [Thu, 13 Apr 2017 23:22:18 +0000 (23:22 +0000)]
banner(6): Squash a harmless coverity warning
The destination buffer is sized as the sum of program argument lengths, so
it has plenty of room for *argv. Appease Coverity by using strlcpy instead
of strcpy. Similar to a nearby cleanup performed in r316500.
Cache compiler metadata and reuse it at installworld time.
Right after cross-tools, a compiler-metadata.mk file is created that
stores all of the bsd.compiler.mk metadata. It is then read in
with a fail-safe during installworld time.
The file is explicitly removed when invoking cross-tools to ensure that
a stale file is not left around from odd manual 'make _cross-tools' ->
'make installworld' invocations.
This fixes several issues:
- With WITH_SYSTEM_COMPILER (default yes on head and no on releng/11.0):
If you build on a system where the bootstrap compiler does not
build due to the host compiler matching the in-tree one, but then
installworld on another system where that logic fails (a
bootstrap compiler is needed), the installworld immediately fails
with:
sh: cc: not found
Note that fixing this logic may then hit a case where a rebuild is
attempted in installworld. Normally cc would be ran with
'CFLAGS+=ERROR-tried-to-rebuild-during-make-install' to cause an
error such as:
cc: error: no such file or directory: 'ERROR-tried-to-rebuild-during-make-install'
However, now it will just fail with the 'cc: not found' error.
Inspection of the compile line will show
'ERROR-tried-to-rebuild-during-make-install'; It's not useful to
set CC to anything other than 'cc' during install as it is more
helpful to see the attempted compile rather than some other bogus
error.
- This now avoids running bsd.compiler.mk (cc executions) even more
during installworld. There are compiler-dependent SUBDIR in the
tree which required having a compiler during install.
There is at least 1 case where CC is still executed in the install,
such as from a LOOKUP!= in secure/lib/libcrypto/Makefile.inc checking
for 'vzeroall' support. This is not significant for installworld
as the lookup has a fallback (and hides its error) and only modifies CFLAGS,
thus it's not worth fixing.
Add an NFSv4.1 mount option for "use one openowner".
Some NFSv4.1 servers such as AmazonEFS can only support a small fixed number
of open_owner4s. This patch adds a mount option called "oneopenown" that
can be used for NFSv4.1 mounts to make the client do all Opens with the
same open_owner4 string. This option can only be used with NFSv4.1 and
may not work correctly when Delegations are is use.
Add call to svcpool_close() for the NFSv4 callback pool (svcpool_nfscbd).
A function called svcpool_close() was added to the server side krpc by
r313735, so that a pool could be closed without destroying the data structures.
This little patch adds a call to it for the callback pool (svcpool_nfscbd),
so that the nfscbd daemon can be killed/restarted and continue to work
correctly.
cem [Thu, 13 Apr 2017 17:47:44 +0000 (17:47 +0000)]
dummynet: Use strlcpy to appease static checkers
Some dummynet modules used strcpy() to copy from a larger buffer
(dn_aqm->name) to a smaller buffer (dn_extra_parms->name). It happens that
the lengths of the strings in the dn_aqm buffers were always hardcoded to be
smaller than the dn_extra_parms buffer ("CODEL", "PIE").
Use strlcpy() instead, to appease static checkers. No functional change.
cem [Thu, 13 Apr 2017 17:34:51 +0000 (17:34 +0000)]
linux_ioctl: Refactor some v4l2 struct converters
According to the C standard, it is invalid to copy beyond the end of an
object, even if that object is obviously a member of a larger object (a
struct, in this case).
Appease the standard and Coverity by refactoring the copy in a
straightforward way. No functional change.
When checksums of received IP and UDP header already checked, UDP uses
sbappendaddr_locked() to pass received data to the socket.
sbappendaddr_locked() uses given mbuf as is, and if NIC supports checksum
offloading, mbuf contains csum_data and csum_flags that were calculated
for already stripped headers. Some NICs support only limited checksums
offloading and do not use CSUM_PSEUDO_HDR flag, and csum_data contains
some value that UDP/TCP should use for pseudo header checksum calculation.
When L2TP is used for tunneling with mpd5, ng_ksocket receives mbuf with
filled csum_flags and csum_data, that were calculated for outer headers.
When L2TP header is stripped, a packet that was tunneled goes to the IP
layer and due to presence of csum_flags (without CSUM_PSEUDO_HDR) and
csum_data, the UDP/TCP checksum check fails for this packet.
Reported by: Irina Liakh <spell at itl ua>
Tested by: Irina Liakh <spell at itl ua>
MFC after: 1 week
andrew [Thu, 13 Apr 2017 15:43:44 +0000 (15:43 +0000)]
Don't prefix zero with 0x in assym.s.
The arm64 binutils only accepts 0 as an offset to the Load-Acquire Register
instructions where llvm will acceps both 0 and 0x0. The thread switching
code uses these with SCHED_ULE to block waiting for a lock to be released.
As the offset of the data to be loaded is zero this is safe, however it is
useful to keep the offset in the instruction to document what is being
loaded.
To work around this issue in binutils only generate the 0x prefix for
non-zero values.
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