In certain emergency cases such as media failure or removal, UFS will
initiate a forced unmount in order to prevent dirty buffers from
accumulating against the no-longer-usable filesystem. The presence
of a stacked filesystem such as nullfs or unionfs above the UFS mount
will prevent this forced unmount from succeeding.
This change addreses the situation by allowing stacked filesystems to
be recursively unmounted on a taskqueue thread when the MNT_RECURSE
flag is specified to dounmount(). This call will block until all upper
mounts have been removed unless the caller specifies the MNT_DEFERRED
flag to indicate the base filesystem should also be unmounted from the
taskqueue.
To achieve this, the recently-added vfs_pin_from_vp()/vfs_unpin() KPIs
have been combined with the existing 'mnt_uppers' list used by nullfs
and renamed to vfs_register_upper_from_vp()/vfs_unregister_upper().
The format of the mnt_uppers list has also been changed to accommodate
filesystems such as unionfs in which a given mount may be stacked atop
more than one lower mount. Additionally, management of lower FS
reclaim/unlink notifications has been split into a separate list
managed by a separate set of KPIs, as registration of an upper FS no
longer implies interest in these notifications.
Reviewed by: kib, mckusick
Tested by: pho
Differential Revision: https://reviews.freebsd.org/D31016
The previous pattern had the (harmless) side-effect of duplicating the
entry in the config file.
No functional change intended.
Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/510
When a cmpset for removing the PG_RW bit in pmap_promote_pde() fails,
there is no need to repeat the alignment, PG_A, and PG_V tests just to
reload the PTE's value. The only bit that we need be concerned with at
this point is PG_M. Use fcmpset instead.
MFC after: 1 week
Old expression happens to provide the correct answer, but assumes that
kernel is loaded at physical address zero, with 2M gap. Do not use
kernphys to calculate KVA of kernel text start, just explicitly write
out KERNBASE and the hole size.
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D31121
With recent ATF (v2.5) the PMIC is reset to I2C mode.
Without a PMIC no regulators can be changed/enabled/disabled
This fixes cpufreq on A64 (at least) and anything else that needs
regulators handled by the PMIC.
MFC after: 3 days
Sponsored by: Diablotin Systems
IEEE Std 1003.1-2008 mandates that -F str be treated the same as -v
FS=str. For a null string, this was not the case. Since awk(1) documents
that a null string for FS has a specific behavior, make -F '' behave
consistently with -v FS="".
PR: 241441
Upstream issue: https://github.com/onetrueawk/awk/issues/127
Upstream pull request: https://github.com/onetrueawk/awk/pull/128
MFC After: 2 weeks
Sponsored by: Netflix
Mount options aren't solely ASCII strings. In addition, experience to
date suggests that the mount options are much less useful than was
originally supposed and the mount flags suffice to make decisions. Drop
the reporting of options for the mount/remount/unmount events.
Reviewed by: markj
Reported by: KASAN
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D31287
The call to pmap_allow_2m_x_page() in pmap_enter_object() is redundant.
Specifically, even without the call to pmap_allow_2m_x_page() in
pmap_enter_object(), pmap_allow_2m_x_page() is eventually called by
pmap_enter_pde(), so the outcome will be the same. Essentially,
calling pmap_allow_2m_x_page() in pmap_enter_object() amounts to
"optimizing" for the unexpected case.
Reviewed by: kib
MFC after: 1 week
Preallocate a geom_event (using the new geom_alloc_event) when we create
a disk. When we create the disk, we're going to be in a sleepable
context, so we can always allocate this extra bit of memory. Then use
this preallocated memory to free the disk. CAM can try to free the disk
from an unsleepable context if there was I/O outstanding when the disk
was destroyted (say because the SIM said it had gone away). The I/O
context isn't sleepable. Rather than trying to invent a retry mechanism
and making sure all the other geom_disk consumers did it properly,
preallocating the event ensure that the geom_disk will be properly torn
down, even when there's memory pressure when the disk departs.
Reviewd by: jhb
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D30544
g_alloc_event will allocate storage for an opaque event. g_post_event_ep
can use memory returned by g_alloc_event to send an event from a context
that might not be able to allocate the event. Occasionally, we can
alloate memory when we create an object, but not while we're destroy
it. This allows one to allocate at creation time memory to use when
destorying the object.
Reviewed by: jhb
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D30544
It is installed with other unicode locales, from monetdef_unicode.
This is just a band-aid to fix the build, as it's not clear how to
regenerate this Makefile.
Fixes: 0a36787e4c
This variable is only used to rate-limit "Root mount waiting for: ..."
messages using ppsratecheck().
Reported by: KMSAN
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Unicode locales are maintained and to evolved in cldr.
Generating the other locales from the unicode gets more and more painful
over the time.
Let's freeze the other locales to cldr 34.0.
KASAN hooks will not generate reports if panicstr != NULL, but then
there is a window after the initial panic() call where another report
may be raised. This can happen if a false positive occurs; to simplify
debugging of such problems, avoid recursing.
Sponsored by: The FreeBSD Foundation
redzone(9) does some munging of the allocation to insert redzones before
and after a valid memory buffer, but KASAN does not know about this and
will raise false positives if both are configured. Until this is fixed,
do not allow both to be configured. Note that KASAN provides similar
checking on its own but currently does not force the creation of
redzones for all UMA allocations; this should be addressed as well.
Sponsored by: The FreeBSD Foundation
Add a label to md devices created by this test. The next time this
test leaks md devices, finding the culprit will be much easier.
Thanks to: sobomax, for adding labels in r322969
MFC after: 1 week
Sponsored by: Dell EMC Isilon
readlink does not NUL-terminate the output buffer. This led to spurious
failures to destroy the md device because the unit number was garbage.
NUL-terminate the output buffer.
Reported by: ASLR
MFC after: 1 week
Sponsored by: Dell EMC Isilon
ATF cleanup functions cannot use functions such as ATF_REQUIRE
and atf_tc_fail. These functions assert that a test case is
currently running, which is not true during cleanup, so the
process aborts. Change the cleanup function to simply print
to stderr and return.
MFC after: 1 week
Sponsored by: Dell EMC Isilon
There is no need to read the same variable to check if the CPU supports
crc32c instructions.
Reviewed by: arichardson, kib, markj
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D31274
This can be useful for, e.g., unmounting filesystems that were needed
for shutdown.
Reviewed by: kib
Sponsored by: NetApp, Inc.
Sponsored by: Klara, Inc.
X-NetApp-PR: #63
Differential Revision: https://reviews.freebsd.org/D31230
It is useful to have control over the number of iterations of zloop so
we can easily produce "x core dumps found *in y iterations*" metrics.
Using random values for run/pass times doesn't improve coverage in a
meaningful way.
Randomizing run time could be seen as a compromise between running a
greater variety of shorter tests versus a smaller variety of longer
tests within a fixed time span. However, it is not desirable when
running a fixed number of iterations.
Pass time already incorporates randomness within ztest.
Either parameter can be passed to ztest explicitly if the defaults are
not satisfactory.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: John Kennedy <john.kennedy@delphix.com>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes#12411
This repeats amd64's cfcbf8c6fd (r180498) and i386's cf3508519c
(r202894) but for riscv; pmap_kextract must be lock-free and so it can
race with superpage promotion and demotion, thus the L2 entry must only
be loaded once to avoid using inconsistent state.
PR: 250866
Reviewed by: markj, mhorne
Tested by: David Gilbert <dgilbert@daveg.ca>
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D31253
Buggy SD card drivers may attach and detach a mmc(4) driver instance in
quick succession. In this case mmc(4) must disestablish its intrhook
callback during detach. Thus, this change adds a call to
config_intrhook_drain(), which blocks or does nothing if the intrhook is
running or has already ran (the SD card was plugged in), and
disestablishes the hook if it hasn't ran yet (the SD card was not
plugged in).
PR: 254373
Reviewed by: imp, manu, markj
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D31262
