as it is now, devfs ignores MNT_FORCE anyway, so it needs to be modified
to trigger the panic) with consumers still opened.
Note that this still results in a leak of r/w/e counters. It seems
to be harmless, though. If anyone knows a better way to approach
this - please tell.
Discussed with: kib@, mav@
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3050
For example, without this patch, the following three lines
in /boot/loader.conf would result in /boot/root.img being preloaded
twice, and two md(4) devices - md0 and md1 - being created.
initmd_load="YES"
initmd_type="md_image"
initmd_name="/boot/root.img"
Reviewed by: marcel@
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3204
When doing a data abort from userland it is possible to get
more than one data abort inside the same exception level.
Add an appropriate exception number to allow nesting of
data_abort handler for EL0.
Reviewed by: andrew
Obtained from: Semihalf
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3276
CloudABI processes should run in capabilities mode automatically. There
is no need to switch manually (e.g., by calling cap_enter()). Add a
flag, SV_CAPSICUM, that can be used to call into cap_enter() during
execve().
Reviewed by: kib
reported, on APs. We already did this on BSP.
Otherwise, the userspace software which depends on the features
reported by the high CPUID levels is misbehaving. In particular, AVX
detection is non-functional, depending on which CPU thread happens to
execute when doing CPUID. Another victim is the libthr signal
handlers interposer, which needs to save full FPU extended state.
Reported and tested by: Andre Meiser <ortadur@web.de>
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
- The existing TCP INP_INFO lock continues to protect the global inpcb list
stability during full list traversal (e.g. tcp_pcblist()).
- A new INP_LIST lock protects inpcb list actual modifications (inp allocation
and free) and inpcb global counters.
It allows to use TCP INP_INFO_RLOCK lock in critical paths (e.g. tcp_input())
and INP_INFO_WLOCK only in occasional operations that walk all connections.
PR: 183659
Differential Revision: https://reviews.freebsd.org/D2599
Reviewed by: jhb, adrian
Tested by: adrian, nitroboost-gmail.com
Sponsored by: Verisign, Inc.
hangs on shutdown with LUNs with mounted filesystems over a disconnected
iSCSI session.
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3052
in savectx where it will be used to store the current state however will
pass in a pcb when vfp_save_state expected a thread pointer.
Obtained from: ABT Systems Ltd
Sponsored by: The FreeBSD Foundation
The check introduced by r285946 failed to add the dependency on
opt_kstack_pages.h which meant the default value for the platform instead
of the customised options KSTACK_PAGES=X was being tested.
Also wrap in #ifdef __FreeBSD__ for portability.
MFC after: 3 days
Sponsored by: Multiplay
Certain system calls have quirks applied to make them work as if called
on an older version of FreeBSD. As CloudABI executables don't have the
FreeBSD OS release number in the ELF header, this value is set to zero,
making the system calls fall back to typically historic, non-standard
behaviour.
Reviewed by: kib
/usr/home/adrian/work/freebsd/head-embedded-2/src/usr.sbin/pw/pw_user.c: In function 'pw_user_next':
/usr/home/adrian/work/freebsd/head-embedded-2/src/usr.sbin/pw/pw_user.c:680: warning: statement with no effect
ethernet controller. The ethernet controller is emulated by VMware
Fusion (for example) and is a good device to demonstrate how to use
the bus space and busdma functions due to its simple programming.
The program sets up the DMA structures, sends a DHCP discover packet,
waits 2 seconds, and iterates over the receive ring for an offer.
to double check for if the card has probed before. In fact, there's no
reason to single check either. Simplify the code as a result.
$FreeBSD$ added to lxutil.c in a non-standard way to help keep the
diffs with upstream to a minimum.
Differential Revision: https://reviews.freebsd.org/D3263
CloudABI has two separate kernel modules: cloudabi and cloudabi64. The
first module contains all the pointer size independent code, whereas
cloudabi64 contains the actual 64-bits specific system calls and the ELF
loader.
Reviewed by: wblock
Obtained from: https://github.com/NuxiNL/freebsd
Differential Revision: https://reviews.freebsd.org/D3258
Now each subcommands checks its arguments in a dedicated functions.
This helps improving input validation, code readability/maintainability
While here:
- Add a -y option to pw userdel/usermod so it can maintain NIS servers if
nispasswd is not defined in pw.conf(5)
- Allow pw -r <rootdir> to remove directory with userdel -r
- Fix bug when renaming a user which was not renaming the user name it groups
it is a member of.
- Only parse pw.conf(5) when needed.
o remove disabled code;
o if nexthop address is link-local, use embedded scope zone id to
determine outgoing interface;
o properly fill ro_dst before doing route lookup;
o remove LLE lookup, instead check rt_flags for RTF_GATEWAY bit.
Sponsored by: Yandex LLC
First they are redundant with the tests we currently have on pw(8)
Second they to modify the host database instead of being self contained withing
the test directory
- Rather than assuming that a process is listening on 127.0.0.1:22, use
nc(1) to find an available port and bind to it for the duration of the
test.
MFC after: 1 week
Sponsored by: EMC / Isilon Storage Division
doubt most people will read to the end... Note the use of sys/cdefs.h
for pre-C11 compilers...
I didn't included a note about being compatibile w/ userland since a
C11 feature should be obviously usable in userland...
Suggested by: imp
When a process is exiting, there is a narrow window where p_cred may be
NULL while its threads are still executing. Specifically, the last thread
to exit a process sets the process state to PRS_ZOMBIE with the proc
spinlock held and then calls thread_exit(). thread_exit() drops the spin
lock, permitting the process to be reaped and thus causing its cred struct
to be released. However, the exiting thread may still cause DTrace probes
to fire by calling sched_throw(), resulting in a double fault if such a
probe enabling attempts to access the GID or UID DIF variables.
The thread's cred reference is not susceptible to this race since it is not
released until after the thread has exited.
MFC after: 1 week
This field is only used in a KASSERT that verifies that no locks are held
when returning to user mode. Moreover, the td_locks accounting is only
correct when LOCK_DEBUG > 0, which is implied by INVARIANTS.
Reviewed by: jhb
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D3205
