ae [Fri, 19 Dec 2014 13:22:02 +0000 (13:22 +0000)]
MFC r275729:
Increase the buffer size to keep the list of programm names when
parsing programm specification. It is safe to not check out of bounds
access, because !isprint(p[i]) check will stop reading, when '\0'
character will be read from the input string.
kib [Fri, 19 Dec 2014 09:36:59 +0000 (09:36 +0000)]
MFC r275833:
The iret instruction may generate #np and #ss fault, besides #gp.
When returning to usermode, the handler for that exceptions is also
executed with wrong gs base. Handle all three possible faults in the
same way, checking for iret fault, and performing full iret.
mav [Thu, 18 Dec 2014 08:46:53 +0000 (08:46 +0000)]
MFC r275568:
Count consecutive read requests as blocking in CTL for files and ZVOLs.
Technically read requests can be executed in any order or simultaneously
since they are not changing any data. But ZFS prefetcher goes crasy when
it receives consecutive requests from different threads. Since prefetcher
works on level of separate blocks, instead of two consecutive 128K requests
it may receive 32 8K requests in mixed order.
This patch is more workaround then a real fix, and it does not fix all of
prefetcher problems, but it improves sequential read speed by 3-4x times
in some configurations. On the other side it may hurt performance if
some backing store has no prefetch, that is why it is disabled by default
for raw devices.
mav [Thu, 18 Dec 2014 08:43:36 +0000 (08:43 +0000)]
MFC r275481:
Add to CTL support for threshold notifications for file-backed LUNs.
Previously it was supported only for ZVOL-backed LUNs, but now should work
for file-backed LUNs too. Used value in this case is a space occupied by
the backing file, while available value is an available space on file
system. Pool thresholds are still not implemented in this case.
mav [Thu, 18 Dec 2014 08:38:07 +0000 (08:38 +0000)]
MFC r275474: Add GET LBA STATUS command support to CTL.
It is implemented for LUNs backed by ZVOLs in "dev" mode and files.
GEOM has no such API, so for LUNs backed by raw devices all LBAs will
be reported as mapped/unknown.
mav [Thu, 18 Dec 2014 08:32:06 +0000 (08:32 +0000)]
MFC r275458:
Do not pre-allocate UNIT ATTENTIONs storage for every possible initiator.
Abusing ability of major UAs cover minor ones we may not account UAs for
inactive ports. Allocate UAs storage for port and start accounting only
after some initiator from that port fetched its first POWER ON OCCURRED.
This reduces per-LUN CTL memory usage from >1MB to less then 100K.
mav [Thu, 18 Dec 2014 08:30:28 +0000 (08:30 +0000)]
MFC r275447:
Do not pre-allocate reservation keys memory for every possible initiator.
In configurations with many ports, like iSCSI, each LUN is typically
accessed only by limited subset of ports. Allocating that memory on
demand allows to reduce CTL memory usage from 5.3MB/LUN to 1.3MB/LUN.
mav [Thu, 18 Dec 2014 08:25:00 +0000 (08:25 +0000)]
MFC r275058: Coalesce last data move and command status for read commands.
Make CTL core and block backend set success status before initiating last
data move for read commands. Make CAM target and iSCSI frontends detect
such condition and send command status together with data. New I/O flag
allows to skip duplicate status sending on later fe_done() call.
For Fibre Channel this change saves one of three interrupts per read command,
increasing performance from 126K to 160K IOPS. For iSCSI this change saves
one of three PDUs per read command, increasing performance from 1M to 1.2M
IOPS.
mav [Thu, 18 Dec 2014 08:22:16 +0000 (08:22 +0000)]
MFC r274962: Replace home-grown CTL IO allocator with UMA.
Old allocator created significant lock congestion protecting its lists
of preallocated I/Os, while UMA provides much better SMP scalability.
The downside of UMA is lack of reliable preallocation, that could guarantee
successful allocation in non-sleepable environments. But careful code
review shown, that only CAM target frontend really has that requirement.
Fix that making that frontend preallocate and statically bind CTL I/O for
every ATIO/INOT it preallocates any way. That allows to avoid allocations
in hot I/O path. Other frontends either may sleep in allocation context
or can properly handle allocation errors.
On 40-core server with 6 ZVOL-backed LUNs and 7 iSCSI client connections
this change increases peak performance from ~700K to >1M IOPS! Yay! :)
pfg [Tue, 16 Dec 2014 21:13:55 +0000 (21:13 +0000)]
MFC r275553, r275612;
patch(1): Bring fixes from OpenBSD
Check fstat return value. Use off_t for file size and offsets.
Avoid iterating over end of string.
Introduce strtolinenum to properly check line numbers while parsing:
no signs, no spaces, just digits, 0 <= x <= LONG_MAX
Properly validate line ranges supplied in diff file to prevent overflows.
Also fixes an out of boundary memory access because the resulting values
are used as array indices.
jhb [Tue, 16 Dec 2014 20:05:10 +0000 (20:05 +0000)]
MFC 271635,271722:
- Only the manpage updates from 271635 are merged to give additional
heads up for the stricter checks in 11, but the kernel in 10 remains
permissive.
- Fail with EINVAL if an invalid protection mask is passed to mmap().
- Fail with EINVAL if an unknown flag is passed to mmap().
- Fail with EINVAL if both MAP_PRIVATE and MAP_SHARED are passed to
mmap().
- Require one of either MAP_PRIVATE or MAP_SHARED for non-anonymous
mappings.
- Remove mention of MAP_INHERIT. It hasn't been implemented for thirteen
years.
- Remove mention of unimplemented MAP_SWAP. There are no future plans to
implement it.
jhb [Tue, 16 Dec 2014 19:45:56 +0000 (19:45 +0000)]
MFC 272897:
Various fixes to stats:
- Read the counts of received, dropped, and transmitted management
packets and add sysctl nodes for them.
- Fix the total octets received/transmitted to read all 64 bits of
the counters.
- Add missing sysctl nodes for rlec, tncrs, fcruc, tor, and tot.
- Remove spurious spaces.
pfg [Tue, 16 Dec 2014 18:45:31 +0000 (18:45 +0000)]
MFC r275645;
ext2fs: Fix old out-of-bounds access.
Overrunning buffer pointed to by (caddr_t)&oip->i_db[0] of 48 bytes by
passing it to a function which accesses it at byte offset 59 using
argument 60UL.
The issue was inherited from an older FFS implementation and
fixed there with by merging UFS2 in r98542. We follow the
FFS fix.
kib [Mon, 15 Dec 2014 11:00:56 +0000 (11:00 +0000)]
MFC r275619:
Check for bo_bufobj->bo_object for NULL and cache the value in local
variable to avoid NULL dereference in getnewbuf_reuse_bp(). The vnode
owning the buffer is not locked there.
Currently, there can be no more than INT_MAX positional parameters. Make
sure to treat all higher ones as unset to avoid incorrect results and
crashes.
On 64-bit systems, our atoi() takes the low 32 bits of the strtol() and
sign-extends them.
On 32-bit systems, the call to atoi() returned INT_MAX for too high values
and there is not enough address space for so many positional parameters, so
there was no issue.
andrew [Sun, 14 Dec 2014 17:38:43 +0000 (17:38 +0000)]
MFC 275415:
Allow the UAL APSR_nzcv format for the mrc and mrc2 instructions. The clang
integrated assembler only allows these forms so binutils will need to
support them.
Sponsored by: ABT Systems Ltd
MFC 275584:
Fix mrc and mrc2 with APSR_nzcv. Binutils encodes it internally as 0 where
we need it to be set to 15 for it to be equivalent to r15.
andrew [Sun, 14 Dec 2014 16:28:53 +0000 (16:28 +0000)]
Clean up our ARM assembly:
MFC 275256:
Switch to the ARM unified assembly language as the clang integrated as only
supports it. Binutils supports it when the ".syntax unified" directive
is set.
Sponsored by: ABT Systems Ltd
MFC 275264:
Update _ENTRY to use _EENTRY to reduce the common code.
MFC 275321:
Remove extra labels, ENTRY_NP already provides them.
Sponsored by: ABT Systems Ltd
MFC 275322:
Correctly a few incorrect uses of ENTRY/EENTRY and END/EEND
Sponsored by: ABT Systems Ltd
MFC 275416:
Fix the name of the coprocessor to include the "p" prefix, the clang
integrated assembler expects this.
Sponsored by: ABT Systems Ltd
MFC 275418:
Switch to unified syntax so these can be built with clang 3.5.
Sponsored by: ABT Systems Ltd
MFC 275519:
Add missing END macros to some of the xscale functions.
Sponsored by: ABT Systems Ltd
MFC 275520:
Use the unified syntax in a few more assembly files
Sponsored by: ABT Systems Ltd
MFC 275521:
Set the alignment to 4-bytes after a string as clang 3.5 can switch to
thumb mode if this is incorrect.
Sponsored by: ABT Systems Ltd
MFC 275522:
Place the literal pool after a RET otherwise clang 3.5 tries to put it too
far away from a ldr psuedo instruction. With this clang will place the
literal value here where it's close enough to be loaded.
Sponsored by: ABT Systems Ltd
MFC 275523:
Switch to an armv6k cpu, without this clang 3.5 complains "bx lr" is
unsupported as it needs a newer cpu.
Sponsored by: ABT Systems Ltd
MFC 275524:
Switch to a .cpu directive. These will work when clang 3.5 is imported
where the .arch directive is a nop.
andrew [Sun, 14 Dec 2014 15:33:45 +0000 (15:33 +0000)]
MFC 273927:
Move the definitions of the fdt functions from a uboot header to a new fdt
header. There is nothing in the fdt spec that ties it to U-Boot.
While here sort and fix the signature of fdt_setup_fdtp.
MFC 273934:
Start to allow platforms other than U-Boot to use the FDT code in loader by
moving U-Boot specific code from libfdt.a to a new libuboot_fdt.a. This
needs to be a new library for linking to work correctly.
This fixes a bug in the llvm vectorizer, which could sometimes cause
vectorized loops to perform an additional iteration, leading to possible
buffer overruns. Symptoms of this, which are usually segfaults, were
first noticed when building gcc ports, here:
dim [Tue, 9 Dec 2014 07:15:53 +0000 (07:15 +0000)]
MFC r275386:
Let GNU ld be less obscure about missing symbols and DSOs. If the BFD
object looks like a typical shared library, suggest adding '-l<foo>',
where <foo> has the 'lib' prefix and '.so<bar>' or '.a' suffix removed.
Otherwise, suggest adding '-l:<foo>', where <foo> is the full DT_SONAME.
delphij [Tue, 9 Dec 2014 00:47:02 +0000 (00:47 +0000)]
MFC r275071:
Reinstitate send() after syslogd restarts.
In r228193 the test of CONNPRIV have been moved to before the _usleep
and send in vsyslog(). When syslogd restarts, this would prevent the
message being logged after the disconnect/connect dance for
scenario #1.
mav [Mon, 8 Dec 2014 09:47:49 +0000 (09:47 +0000)]
MFC r275368:
When passing LUN IDs through treat ASCII values as fixed-length, not
interpreating NULLs as EOLs, but converting them to spaces.
SPC-4 does not tell that T10-based IDs should be NULL-terminated/padded.
And while it tells that it should include only ASCII chars (0x20-0x7F),
there are some USB sticks (SanDisk Ultra Fit), that have NULLs inside
the value. Treating NULLs as EOLs there made those LUN IDs non-unique.
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