atomic_cas_32 is implemented using atomic_fcmpset_32 on all platforms.
Ditto for atomic_cas_64 and atomic_fcmpset_64 on platforms that have it.
The only exception is sparc64 that provides MD atomic_cas_32 and
atomic_cas_64.
This is slightly inefficient as fcmpset reports whether the operation
updated the target and that information is not needed for cas.
Nevertheless, there is less code to maintain and to add for new platforms.
Also, the operations are done inline now as opposed to function calls before.
atomic_add_64_nv is implemented using atomic_fetchadd_64 on platforms
that provide it.
casptr, cas32, atomic_or_8, atomic_or_8_nv are completely removed as they
have no users.
atomic_mtx that is used to emulate 64-bit atomics on platforms that lack
them is defined only on those platforms.
As a result, platform specific opensolaris_atomic.S files have lost most of
their code. The only exception is i386 where the compat+contrib code
provides 64-bit atomics for userland use. That code assumes availability of
cmpxchg8b instruction. FreeBSD does not have that assumption for i386
userland and does not provide 64-bit atomics. Hopefully, this can and will
be fixed.
MFC after: 3 weeks
called in syscall context, so it must enter epoch itself. This
changeset originates from early version of the patch, and somehow
slipped to the final version.
Reported by: pho
Pass the list of user selected disks from zfsboot to bootconfig so that
the latter doesn't rely on ESP autodetection that apparently fails for
some cases, e.g. memstick installation with nvme (boot) and sata drives.
While here, fix printing of debug messages in bootconfig.
Reviewed by: bcran, imp, tsoome
Differential Revision: https://reviews.freebsd.org/D21930
Compiling with clang gives a loss-of-alignment error due the cast to
uint8_t *. Since the TLS is always tcb aligned and TP_OFFSET is defined
as sizeof(struct tcb) we can guarantee there is no misalignment. Silence
the error by moving the offset into the inline assembly.
Reviewed by: br
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D21926
As unp_internalize() processes the input control messages, it builds
an output mbuf chain containing the internalized representations of
those messages. In one special case, that of an empty SCM_RIGHTS
message, the message is simply discarded. However, the loop which
appends mbufs to the output chain assumed that each iteration would
produce an mbuf, resulting in a null pointer dereference if an empty
SCM_RIGHTS message was followed by a non-empty message.
Fix this by advancing the output mbuf chain tail pointer only if an
internalized control message was produced.
Reported by: syzbot+1b5cced0f7fad26ae382@syzkaller.appspotmail.com
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
This adds a TOE hook to allocate a KTLS session. It also recognizes
TLS mbufs in the socket buffer and sends those to the NIC using a TLS
work request to encrypt the record before segmenting it.
TOE TLS support must be enabled via the dev.t6nex.<N>.tls sysctl in
addition to enabling KTLS.
Reviewed by: np, gallatin
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D21891
Clang from trunk recently added a warning for when implicit int-to-float
conversions cause a loss of precision. The code in question is designed
to be able to handle that, so add explicit casts to silence this.
Submitted by: James Clarke <jrtc27@jrtc27.com>
Reviewed by: dim
Obtained from: CheriBSD
MFC after: 1 week
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D21913
This adds the glue to allocate TLS sessions and invokes it from
the TLS enable socket option handler. This also adds some counters
for active TOE sessions.
The TOE KTLS mode is returned by getsockopt(TLSTX_TLS_MODE) when
TOE KTLS is in use on a socket, but cannot be set via setsockopt().
To simplify various checks, a TLS session now includes an explicit
'mode' member set to the value returned by TLSTX_TLS_MODE. Various
places that used to check 'sw_encrypt' against NULL to determine
software vs ifnet (NIC) TLS now check 'mode' instead.
Reviewed by: np, gallatin
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D21891
ABI already guarantees the direction is forward. Note this does not take care
of i386-specific cld's.
Reviewed by: kib
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D21906
This warning (comparing a pointer against a zero character literal
rather than NULL) has existed since GCC 7.1.0, and was recently added to
Clang trunk.
Almost all of these are harmless, except for fwcontrol's str2node, which
needs to both guard against dereferencing a NULL pointer (though in
practice it appears none of the callers will ever pass one in), as well
as ensure it doesn't parse the empty string as node 0 due to strtol's
awkward interface.
Submitted by: James Clarke <jtrc27@jrtc27.com>
Obtained from: CheriBSD
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D21914
The PCI block in the adapter requires this field to be set to a valid
queue ID. It is not clear why it did not fail on all machines, but
the effect was that crypto operations reading input data via DMA
failed with an internal PCI read error on machines with 128G or more
of RAM.
Reported by: gallatin
Reviewed by: np
MFC after: 3 days
Sponsored by: Chelsio Communications
As noted by the commit message, callouts are now persistant
and should not be in the auto-zero section of the RQ's and SQ's.
This fixes an assert when using the TX completion event
factor feature with mlx5en(4).
Found by: gallatin@
MFC after: 3 days
Sponsored by: Mellanox Technologies
'quarterly' package sets do not exist for head, so explicitly
install the 'latest' configuration file there. Otherwise,
fall back to the original conditional evaluation to determine
if the 'latest' or 'quarterly' configuration file should be
installed.
Reported by: manu
Reviewed by: manu
MFC after: 3 days
Sponsored by: Rubicon Communications, LLC (Netgate)
protected by IF_ADDR_LOCK(), which was a mutex, so that two simultaneous
if_setlladdr() can't execute. Later it was switched to IF_ADDR_RLOCK(),
likely by a mistake. Later it was switched to NET_EPOCH_ENTER(). Then I
incorrectly added NET_EPOCH_ASSERT() here.
In reality ifp->if_addr never goes away and never changes its length. So,
doing bcopy() in it is always "safe", meaning it won't dereference a wrong
pointer or write into someone's else memory. Of course doing two bcopy() in
parallel would result in a mess of two addresses, but net epoch doesn't
protect against that, neither IF_ADDR_RLOCK() did.
So for now, just remove the assertion and leave for later a proper fix.
Reported by: markj
It was trying to destroy the pool while zfsd was detaching the spare, and
"zpool destroy" failed. Fix by waiting until the spare has fully detached.
MFC after: 2 weeks
Sponsored by: Axcient
The test declared that it only needed 5 disks, but actually tried to use 6.
Fix it to use just 5, which is all it really needs.
MFC after: 2 weeks
Sponsored by: Axcient
During a CoW fault, we must check for both 4KB and 2MB mappings before
clearing PGA_WRITEABLE on the old mapping's page. Previously we were
only checking for 4KB mappings. This was missed in r344106.
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
This matches the state prior to r353149 and fixes crashes with DRM
modules.
Reported and tested by: cy, garga, Krasznai Andras
Fixes: r353149 ("amd64 pmap: implement per-superpage locks")
Sponsored by: The FreeBSD Foundation
pmap_remove_l3() may remove the last mapping of a page, in which case
it must clear PGA_WRITEABLE.
Reported by: Jenkins, via lwhsu
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
ATF functions such as ATF_REQUIRE do not work correctly in child processes.
Use plain C functions to report errors instead.
In the parent, check for the untimely demise of children. Without this,
the test hung until the framework's timeout.
Raise the resource limit on the number of open files. If this was too low,
the test hit the two problems above.
Restore the kern.maxfiles sysctl OID in the cleanup function.
The body prematurely removed the symlink in which the old value was saved.
Make the test more robust by opening more files. In fact, due to the
integer division by 4, this was necessary to make the test valid with
some initial values of maxfiles. Thanks, asomers@.
wait() for children instead of sleeping.
Clean up a temporary file created by the test ("afile").
Reviewed by: asomers
MFC after: 1 week
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D21900
As long as we support ZFS on 32-bit platforms we should do this for all
64-bit variables that are modified in a lockless fashion using atomic
operations. Otherwise, there is a risk of a reading a torn value.
Here is a rationale for why I am doing this in dmu_object_alloc_impl:
- it's very recent code
- the code deals with object IDs and a number of objects in a file
system can overflow 32 bits
- incorrect allocation of an object ID may result in hard to debug
problems
- fixing all plain reads of 64-bit atomic variables is not a trivial
undertaking to do in one shot, so I chose to do it incrementally
MFC after: 3 weeks
X-MFC after: r353301, r353176
Make sure the vnet_shutdown field is not set until after all
VNET_SYSUNINIT()'s in the SI_SUB_VNET_DONE subsystem have been
executed. Especially the vnet_if_return() functions requires that
if_move() is still operational.
Reported by: lwhsu@
MFC after: 1 week
Sponsored by: Mellanox Technologies
At the moment i386 does not provide 64-bit atomic operations in
userland. Exposing some atomic_*_64 defines can cause unnecessary
confusion.
Discussed with: kib
MFC after: 2 weeks
In case the implementation ever changes from using a chain of next pointers,
then changing the macro definition will be necessary, but changing all the
files that iterate over vm_map entries will not.
Drop a counter in vm_object.c that would have an effect only if the
vm_map entry count was wrong.
Discussed with: alc
Reviewed by: markj
Tested by: pho (earlier version)
Differential Revision: https://reviews.freebsd.org/D21882
Add generic PVR values for PowerISA 2.07 and 3.00. This allows booting pseries
in QEMU with compatibilty mode enabled.
Submitted by: Shawn Anastasio <shawn@anastas.io>
|
This adds two implementations for each atomic_fcmpset_ and atomic_cmpset_
short and char functions, selectable at compile time for the target
architecture. By default, it uses a generic shift-and-mask to perform atomic
updates to sub-components of 32-bit words from <sys/_atomic_subword.h>.
However, if ISA_206_ATOMICS is defined it uses the ll/sc instructions for
halfword and bytes, introduced in PowerISA 2.06. These instructions are
supported by all IBM processors from POWER7 on, as well as the Freescale/NXP
e6500 core. Although the e5500 and e500mc both implement PowerISA 2.06 they
do not implement these instructions.
As part of this, clean up the atomic_(f)cmpset_acq and _rel wrappers, by
using macros to reduce code duplication.
ISA_206_ATOMICS requires clang or newer binutils (2.20 or later).
Differential Revision: https://reviews.freebsd.org/D21682
Acquire the inp lock before checking whether the socket is already bound,
and around updates to the inp_vflag field.
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D21867
About 11 minutes of poudriere -s -j 104 and probing on return value of
trylocks reveals that over 10% of attempts fail, which in turn means
there are more atomics performed than necessary.
Trylocking was there to try preventing migration, but it's not very likely
to happen if the lock is uncontested.
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D21925
When epoch(9) was introduced to network stack, it was basically
dropped in place of existing locking, which was mutexes and
rwlocks. For the sake of performance mutex covered areas were
as small as possible, so became epoch covered areas.
However, epoch doesn't introduce any contention, it just delays
memory reclaim. So, there is no point to minimise epoch covered
areas in sense of performance. Meanwhile entering/exiting epoch
also has non-zero CPU usage, so doing this less often is a win.
Not the least is also code maintainability. In the new paradigm
we can assume that at any stage of processing a packet, we are
inside network epoch. This makes coding both input and output
path way easier.
On output path we already enter epoch quite early - in the
ip_output(), in the ip6_output().
This patch does the same for the input path. All ISR processing,
network related callouts, other ways of packet injection to the
network stack shall be performed in net_epoch. Any leaf function
that walks network configuration now asserts epoch.
Tricky part is configuration code paths - ioctls, sysctls. They
also call into leaf functions, so some need to be changed.
This patch would introduce more epoch recursions (see EPOCH_TRACE)
than we had before. They will be cleaned up separately, as several
of them aren't trivial. Note, that unlike a lock recursion the
epoch recursion is safe and just wastes a bit of resources.
Reviewed by: gallatin, hselasky, cy, adrian, kristof
Differential Revision: https://reviews.freebsd.org/D19111
The new sysctl was not added to the siftr.4 man page at the time.
This updates the man page, and removes one left over trailing whitespace.
Submitted by: Richard Scheffenegger
Reviewed by: bcr@
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D21619
