By default, FUSE file systems are assumed not to support lookups for "."
and "..". They must opt-in to that. To cope with this limitation, the
fusefs kernel module caches every fuse vnode's parent's inode number,
and uses that during VOP_LOOKUP for "..". But if the parent's vnode has
been reclaimed that won't be possible. Previously we paniced in this
situation. Now, we'll return ESTALE instead. Or, if the file system
has opted into ".." lookups, we'll just do that instead.
This commit also fixes VOP_LOOKUP to respect the cache timeout for ".."
lookups, if the FUSE file system specified a finite timeout.
PR: 259974
MFC after: 2 weeks
Reviewed by: pfg
Differential Revision: https://reviews.freebsd.org/D33239
In an earlier version of the revision that created that sysctl (D20519)
the sysctl was gated by INVARIANTS, so the test had to check for it.
But in the committed version it is always available.
MFC after: 2 weeks
If FUSE_COPY_FILE_RANGE returns successfully, update the atime of the
source and the mtime and ctime of the destination.
MFC after: 2 weeks
Reviewers: pfg
Differential Revision: https://reviews.freebsd.org/D33159
VOPs like VOP_SETATTR can change a file's size, with the vnode
exclusively locked. But VOPs like VOP_LOOKUP look up the file size from
the server without the vnode locked. So a race is possible. For
example:
1) One thread calls VOP_SETATTR to truncate a file. It locks the vnode
and sends FUSE_SETATTR to the server.
2) A second thread calls VOP_LOOKUP and fetches the file's attributes from
the server. Then it blocks trying to acquire the vnode lock.
3) FUSE_SETATTR returns and the first thread releases the vnode lock.
4) The second thread acquires the vnode lock and caches the file's
attributes, which are now out-of-date.
Fix this race by recording a timestamp in the vnode of the last time
that its filesize was modified. Check that timestamp during VOP_LOOKUP
and VFS_VGET. If it's newer than the time at which FUSE_LOOKUP was
issued to the server, ignore the attributes returned by FUSE_LOOKUP.
PR: 259071
Reported by: Agata <chogata@moosefs.pro>
Reviewed by: pfg
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D33158
When a softclock thread prepares to go off-CPU, the following happens in
the context of the thread:
1. callout state is locked
2. thread state is set to IWAIT
3. thread lock is switched from the tdq lock to the callout lock
4. tdq lock is released
5. sched_switch() sets td_lock to &blocked_lock
6. sched_switch() releases old td_lock (callout lock)
7. sched_switch() removes td from its runqueue
8. cpu_switch() sets td_lock back to the callout lock
Suppose a timer interrupt fires while the softclock thread is switching
off, and callout_process() schedules the softclock thread. Then there
is a window between steps 5 and 8 where callout_process() can call
sched_add() while td_lock is &blocked_lock, but this is not correct
since the thread is not logically locked.
callout_process() thus needs to spin waiting for the softclock thread to
finish switching off (i.e., after step 8 completes) before rescheduling
it, since callout_process() does not acquire the thread lock directly.
Reported by: syzbot+fb44dbf6734ff492c337@syzkaller.appspotmail.com
Fixes: 74cf7cae4d ("softclock: Use dedicated ithreads for running callouts.")
Reviewed by: mav, kib, jhb
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D33709
Ping does not build (and serves no purpose) if neither is enabled
(i.e., building WITHOUT_INET and WITHOUT_INET6).
This is equvalent to a4ef9e58bc but for rescue/.
PR: 260082
Fixes: a4ef9e58bc ("sbin: build ping if at least one of...")
Sponsored by: The FreeBSD Foundation
This is a re-application of commit
2d82b47a5b, which was reverted since it
broke with syslog daemons that don't adjust the /dev/log recv buffer
size. Now that the default is large enough to accomodate 8KB messages,
restore support for large messages.
PR: 260126
Members with such a type will legitimately have a size of zero, so don't
emit a warning.
PR: 260818
Reviewed by: bz
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D33700
Simplify control flow around handling of the execpath length and signal
trampoline. Cache the sysentvec pointer in a local variable.
No functional change intended.
Reviewed by: kib
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D33703
The firmware files for 3160, 7260, and 7265 imported contain old versions
no longer supported by the driver.
Replace with latest versions from linux-firmware to possibly also
support these chip revisions.
Reported by: FreeBSD User (freebsd walstatt-de.de) on wireless (2021-12-30)
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
We are using a bandaid to wait for queues after station creation
looping and pausing.
The abort condition was looping in the wrong direction so we were
potentially waiting forever if queues never became ready.
From initial user test data we also found that the wait time was
too low in some cases so increase the length.
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
The lang/python* ports failed since they expected CPU_COUNT_S() to be
provided by sys/cpuset.h. Add this function plus 2 more in a way that
is compatible with GLIBC.
Reported by: ler at lerctr.org (Larry Rosenman)
Move an assignment back to where it was before, to turn the
defined-but-not-used error back into a set-but-not-used warning.
Fixes: 01e115ab83 vm_phys: #include vm_extern
Arm64 and powerpc don't include vm_extern.h indirectly in vm_phys.c, which
means that for the sake of those architectures, it must be included explicitly.
Also, fix a set-unused warning that jenkins also found.
Reported by: Jenkins
Fixes: c606ab59e7 vm_extern: use standard address checkers everywhere
Define simple functions for alignment and boundary checks and use them
everywhere instead of having slightly different implementations
scattered about. Define them in vm_extern.h and use them where
possible where vm_extern.h is included.
Reviewed by: kib, markj
Differential Revision: https://reviews.freebsd.org/D33685
Remove sys/mips as the next step of decomissioning mips from the tree.
Remove mips special cases from the kernel make files. Remove the mips
specific linker scripts.
Sponsored by: Netflix
Just have the MD code provide syscall and have generic code for the
rest.
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D33515
Split the powerpc specific parts into kboot/arch/powerpc64. More may be
needed here.
Sponsored by: Netflix
Reviewed by: jhibbits
Differential Revision: https://reviews.freebsd.org/D33514
As the first step at making this more generic, move kboot to top level.
Sponsored by: Netflix
Reviewed by: luporl, tsoome
Differential Revision: https://reviews.freebsd.org/D33513
This hasn't been updated in 10 years in any real way. It's time to
retire it. It hasn't worked in some time due to drivers being removed
starting in FreeBSD 10. All the interesting bits have already been
hoisted into other parts of base. The google code site hasn't had any
commits since 2011 and claims to Target FreeBSD 5, 6, 7, and 8.
Should someone fix the numerous issues, it can be restored.
Sponsored by: Netflix
Reviewed by: brooks
Differential Revision: https://reviews.freebsd.org/D33450
Rather than using the swi infrastructure, rewrite softclock() as a
thread loop (softclock_thread()) and use it as the main routine of the
softclock threads. The threads use the CC_LOCK as the thread lock
when idle.
Reviewed by: mav, imp, kib
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D33683
parseDWM() can advance the time to the next week. If the next week is
in the next month, then tm_mon is incremented. However, the increment
was failing to handle the wraparound from December to January, so when
parsing a rule during the last week of the December, the month would
advance to month 12. This triggered an out-of-bounds read of the
mtab[] array in days_pmonth() after parseDWM() returned. To fix,
this change resets the month to January and increment the year when
the month increment wraps.
The default rule for /var/log/weekly.log triggers this during the
last week of December each year.
Reported by: CHERI
Obtained from: CheriBSD
Reviewed by: jhb
Sponsored by: The University of Cambridge, Google Inc.
Differential Revision: <https://reviews.freebsd.org/D33687>
As with other runtime components like libc or libcxxrt.
If desired we can stop linking devd statically after this change (to
achive approximately no net change in required root filesystem size).
We must set SHLIBDIR with ?= before including <src.opts.mk>, otherwise
that will have set SHBLIDIR to its default value of /usr/lib.
Otherwise, "make delete-old-libs" would suggest to delete libc++.so.1
from /usr/lib, while there was not yet a copy in /lib.
Reviewed by: imp
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D33123
tftp_open reads the first block so copy it in the cached data.
If we have more than one block (i.e. we called tftp_read before
tftp_preload) simply just reset the transfer.
Reported by: mmel
Reviewed by: mmel, tsoome
MFC after: 2 weeks
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D33697
