check hash to the filesystem inodes. Access attempts to files
associated with an inode with an invalid check hash will fail with
EINVAL (Invalid argument). Access is reestablished after an fsck
is run to find and validate the inodes with invalid check-hashes.
This check avoids a class of filesystem panics related to corrupted
inodes. The hash is done using crc32c.
Note this check-hash is for the inode itself and not any of its
indirect blocks. Check-hash validation may be extended to also
cover indirect block pointers, but that will be a separate (and
more costly) feature.
Check hashes are added only to UFS2 and not to UFS1 as UFS1 is
primarily used in embedded systems with small memories and low-powered
processors which need as light-weight a filesystem as possible.
Reviewed by: kib
Tested by: Peter Holm
Sponsored by: Netflix
There is no reason for it to behave differently from openat(fd, NULL).
Also the handling did not worked because the substituted path was from
the system address space, causing EFAULT.
Submitted by: Jack Halford <jack@gandi.net>
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D18501
zdopen() can be used in capability mode. Update zopen.3 accordingly
and fix some grammar nits while I'm here.
Reviewed by: delphij
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D18456
superblock has a check-hash error, an error message noting the
superblock check-hash failure is printed and the mount fails. The
administrator then runs fsck to repair the filesystem and when
successful, the filesystem can once again be mounted.
This approach fails if the filesystem in question is a root filesystem
from which you are trying to boot. Here, the loader fails when trying
to access the filesystem to get the kernel to boot. So it is necessary
to allow the loader to ignore the superblock check-hash error and make
a best effort to read the kernel. The filesystem may be suffiently
corrupted that the read attempt fails, but there is no harm in trying
since the loader makes no attempt to write to the filesystem.
Once the kernel is loaded and starts to run, it attempts to mount its
root filesystem. Once again, failure means that it breaks to its prompt
to ask where to get its root filesystem. Unless you have an alternate
root filesystem, you are stuck.
Since the root filesystem is initially mounted read-only, it is
safe to make an attempt to mount the root filesystem with the failed
superblock check-hash. Thus, when asked to mount a root filesystem
with a failed superblock check-hash, the kernel prints a warning
message that the root filesystem superblock check-hash needs repair,
but notes that it is ignoring the error and proceeding. It does
mark the filesystem as needing an fsck which prevents it from being
enabled for writing until fsck has been run on it. The net effect
is that the reboot fails to single user, but at least at that point
the administrator has the tools at hand to fix the problem.
Reported by: Rick Macklem (rmacklem@)
Discussed with: Warner Losh (imp@)
Sponsored by: Netflix
The list of syscalls that modify st_atim, st_mtim, and st_ctim was quite out
of date and probably not accurate to begin with. Update it, and make it
clear that the list is open-ended.
Reviewed by: kib
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D18410
The getdtablecount.c file won't compile on Linux but it seems like none of
the bootstrap tools actually need it.
Reviewed By: emaste, brooks
Differential Revision: https://reviews.freebsd.org/D14244
No references to any of these exist in the tree. The list was also
erratic with different architectures exporting different things
(arm64 and riscv exported none).
Reviewed by: kib
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D18425
- breaks ports-mgmt/pkg build for mips64, powerpc64 and i386 for some users.
--- pkg-static ---
/usr/lib/liblzma.a(stream_encoder_mt.o): In function `mythread_cond_init':
/usr/local/poudriere/jails/ppc64/usr/src/contrib/xz/src/common/mythread.h:230:
undefined reference to `pthread_condattr_init'
Reported by: jhibbits zeising
An issue remains with BIND_NOW and processes using threads. For now,
restore libc's BIND_NOW disable, and also disable BIND_NOW in rtld and
libthr.
A patch is in review (D18400) that likely fixes this issue, but just
disable BIND_NOW pending further testing after it is committed.
PR: 233333
Sponsored by: The FreeBSD Foundation
in threaded programs that unload libraries.
Summary:
The GNOME update to 3.28 exposed a bug in __elf_phdr_match_addr(), which leads
to a crash when building devel/libsoup on powerpc64.
Due to __elf_phdr_match_addr() limiting its search to PF_X sections, on the
PPC64 ELFv1 ABI, it was never matching function pointers properly.
This meant that libthr was never cleaning up its atfork list in
__pthread_cxa_finalize(), so if a library with an atfork handler was unloaded,
libthr would crash on the next fork.
Normally, the null pointer check it does before calling the handler would avoid
this crash, but, due to PPC64 ELFv1 using function descriptors instead of raw
function pointers, a null check against the pointer itself is insufficient, as
the pointer itself was not null, it was just pointing at a function descriptor
that had been zeroed. (Which is an ABI violation.)
Calling a zeroed function descriptor on PPC64 ELFv1 causes a jump to address 0
with a zeroed r2 and r11.
Submitted by: git_bdragon.rtk0.net
Reviewed By: kib
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D18364
See the review for sample test results.
Reviewed by: kib (kernel part)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D18401
Handling sizes of > 32 backwards will be updated later.
Reviewed by: kib (kernel part)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D18387
Also remove logic to avoid unnecessary stores to the global variable.
Thread creation and destruction are heavy enough that any supposed savings
is in the noise.
MFC after: 2 weeks
Sponsored by: Dell EMC Isilon
For non-ERMS case the code used handle possible trailing bytes with
movsb first and then followed it up with movsq. This also happened
to alter how calculations were done for other cases.
Handle the tail with regular movs, just like when copying forward.
Use leaq to calculate the right offset from the get go, instead of
doing separate add and sub.
This adjusts the offset for non-rep cases so that they can be used
to handle the tail.
The routine is still a work in progress.
Sponsored by: The FreeBSD Foundation
we were looking at the original URL rather than the one we were currently
processing. This meant that if we were trying to retrieve an HTTP URL but
were redirected to an HTTPS URL, and HTTPS proxying was enabled, we would
send an invalid request and most likely get garbage back.
MFC after: 3 days
from setting the volume serial number. This unbreaks older boot blocks
that don't support serial numbers, and allows boot0cfg to set the serial
number itself if requested by the user.
Submitted by: lev@, yuripv@
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D17386
There is probably a PR for this, but I can't find this, or remember who
submitted it. The patch got lost in the noise of another that wasn't
ready to commit.
MFC after: 3 days
When immediate bind mode is requested, as of r340675 rtld processes
irelocs in PLT immediately after other PLT relocs. That addresses the
libc + BIND_NOW startup crash the workaround is no longer needed.
PR: 233333
Until this commit libedit only supported UTF-8 for multibyte charset
Improve it to support other multibyte charsets
Tested with eucJP and SJIS charsets.
Note that this change as been review and committed in upstream libedit
as well via christos@NetBSD
Submitted by: naito.yuichiro _at_ gmail.com
Reviewed by: bapt, pfg, yuripv, 0mp
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D17903
As with r328939 we need to mark local symbols as such. Without this the
assembly parser treats the symbols as global and created relocations
against these private symbols.
MFC with: r339738
Sponsored by: DARPA, AFRL
Matcher function incorrectly assumed that moffset that we get from
findmust is in bytes. Fix this by introducing a stepback function,
taking short path if MB_CUR_MAX is 1, and going back byte-by-byte,
checking if we have a legal character sequence otherwise.
PR: 153502
Reviewed by: pfg, kevans
Approved by: kib (mentor, implicit)
Differential revision: https://reviews.freebsd.org/D18297
Those two manual pages are already referencing each other in the HISTORY
sections, which people might skip. Mention those manual pages explicitly in
the SEE ALSO sections. Also, remove a reference to be(1) from libbe(3).
Reviewed by: bcr
Approved by: krion (mentor, implicit), mat (mentor, implicit)
Differential Revision: https://reviews.freebsd.org/D18136
As requested by a TODO in the source code.
Reviewed by: bcr
Approved by: krion (mentor, implicit), mat (mentor, implicit)
Differential Revision: https://reviews.freebsd.org/D18063
