Zero length client requests result in a bus fault when attempting to
free malloc()ed pointers within the requests softc. Return an error
when the request is zero length.
This properly fixes PR/268062 without regressions.
PR: 268062
Reported by: Robert Morris <rtm@lcs.mit.edu>
MFC after: 3 days
Return the value as stat(2) st_blocks.
Suggested and reviewed by: markj (previous version)
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D37097
This makes tmpfs size accounting correct for the sparce files. Also
correct report st_blocks/va_bytes. Previously the reported value did not
accounted for the swapped out pages.
PR: 223015
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D37097
For dynamically allocated pager type, which inherits the parent's alloc
method, type of the returned object is set to the parent's type
otherwise.
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D37097
The vnode could be reclaimed and allocated again during the lifecycle of
the node, but the node cannot. Also, referencing the node would allow
to reach it and tmpfs mount data from the object, regardless of the
state of the possibly absent vnode.
Still use swp_tmpfs for back-pointer, instead of using handle. Use of
named swap objects would incur taking the sw_alloc_sx on node allocation
and deallocation.
swp_tmpfs is renamed to swp_priv to remove the last bit of tmpfs in vm/.
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D37097
also make it return the count of the swap pages freed, which are not
simultaneously resident in the object.
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D37097
* Add link-state change notifications by subscribing to ifnet_link_event.
In the Linux netlink model, link state is reported in 2 places: first is
the IFLA_OPERSTATE, which stores state per RFC2863.
The second is an IFF_LOWER_UP interface flag. As many applications rely
on the latter, reserve 1 bit from if_flags, named as IFF_NETLINK_1.
This flag is mapped to IFF_LOWER_UP in the netlink headers. This is done
to avoid making applications think this flag is actually
supported / presented in non-netlink outputs.
* Add flag change notifications, by hooking into rt_ifmsg().
In the netlink model, notification should include the bitmask for the
change flags. Update rt_ifmsg() to include such bitmask.
Differential Revision: https://reviews.freebsd.org/D37597
Linux has /sys/firmware/fdt and /proc/device-tree to publish the dtb for
the system. The former has it all in one file, while the latter breaks
it out. Prefer the former since it's the more modern interface, but
retain both since I don't have a PS3 to test to see if its kernel is new
enough for /sys/firmware or not.
In addition, do the proper fixup.
Sponsored by: Netflix
This allows backporting of new fileops function pointers while
preserving KBI.
Bump __FreeBSD_version.
Sponsored by: Juniper Networks, Inc.
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D37636
In the common case, kinst emulates a traced instruction by copying it to
a trampoline, where it is followed by a jump back to the original code,
and pointing the interrupted thread's %rip at the trampoline. In
particular, the trampoline is executed with the same CPU context as the
original instruction, so if interrupts are enabled at the point where
the probe fires, they will be enabled when the trampoline is
subsequently executed.
It can happen that an interrupt is raised while a thread is executing a
kinst trampoline. In that case, it is possible that the interrupt
handler will trigger a kinst probe, so we must ensure that the thread
does not recurse and overwrite its trampoline before it is finished
executing the original contents, otherwise an attempt to trace code
called from interrupt handlers can crash the kernel.
To that end, add a per-CPU trampoline, used when the probe fired with
interrupts disabled. Note that this is not quite complete since it does
not handle the possibility of kinst probes firing while executing an NMI
handler.
Also ensure that we do not trace instructions which set IF, since in
that case it is not clear which trampoline (the per-thread trampoline or
the per-CPU trampoline) we should use, and since such instructions are
rare.
Reported and tested by: Domagoj Stolfa
Reviewed by: christos
Fixes: f0bc4ed144fc ("kinst: Initial revision")
Differential Revision: https://reviews.freebsd.org/D37619
* Correct some function prototypes which were documented with the wrong
pointer type.
* Clarify return values and requirements for freeing the limit handle.
MFC after: 1 week
Sponsored by: Axcient
Reviewed by: oshogbo
Differential Revision: https://reviews.freebsd.org/D37586
shlib_required/provided is enough for the dependencies and this also
causes problems for packages like rescue which shouldn't depend on runtime
at all.
PR: 268063
Sponsored by: Beckhoff Automation GmbH & Co. KG
This allows the use of chroot and/or jail environments which depend on
interpreters registed with imgact_binmisc to use emulator binaries from
the host to emulate programs inside the chroot.
Reviewed by: imp
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D37432
ppp supports MSS clamping for TCP/IPv4. This patch
* improves MSS clamping for TCP/IPv4 by using the MSS as specified
in RFC 6691.
* adds support for MSS clamping for TCP/IPv6.
Reported by: Timo Voelker
Reviewed by: thj
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D37624
All the other functions used pointers for from/to instead of
fixed-size array parameters. More importantly, this function can
accept pointers to buffers of multiple blocks, not just a single
block.
Reported by: GCC -Warray-parameter
Reviewed by: imp, emaste
Differential Revision: https://reviews.freebsd.org/D37547
They are shared between UDP over IPv4 and over IPv6. To prevent all
possible kernel build failures wrap them in #ifdef _SYS_PROTOSW_H_.
Prompted by feedback from jhb@ and jrtc27@ on c93db4abf454.
