[Bug 240874] Linuxolator: unimplemented linux syscalls: memfd_create, inotify_init{,1}
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Mon Jun 29 03:09:55 UTC 2020
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=240874
--- Comment #2 from commit-hook at freebsd.org ---
A commit references this bug:
Author: kevans
Date: Mon Jun 29 03:09:16 UTC 2020
New revision: 362769
URL: https://svnweb.freebsd.org/changeset/base/362769
Log:
linuxolator: implement memfd_create syscall
This effectively mirrors our libc implementation, but with minor fudging --
name needs to be copied in from userspace, so we just copy it straight into
stack-allocated memfd_name into the correct position rather than allocating
memory that needs to be cleaned up.
The sealing-related fcntl(2) commands, F_GET_SEALS and F_ADD_SEALS, have
also been implemented now that we support them.
Note that this implementation is still not quite at feature parity w.r.t.
the actual Linux version; some caveats, from my foggy memory:
- Need to implement SHM_GROW_ON_WRITE, default for memfd (in progress)
- LTP wants the memfd name exposed to fdescfs
- Linux allows open() of an fdescfs fd with O_TRUNC to truncate after dup.
(?)
Interested parties can install and run LTP from ports (devel/linux-ltp) to
confirm any fixes.
PR: 240874
Reviewed by: kib, trasz
Differential Revision: https://reviews.freebsd.org/D21845
Changes:
head/sys/amd64/linux/linux_dummy.c
head/sys/amd64/linux32/linux32_dummy.c
head/sys/arm64/linux/linux_dummy.c
head/sys/compat/linux/linux.c
head/sys/compat/linux/linux.h
head/sys/compat/linux/linux_file.c
head/sys/compat/linux/linux_file.h
head/sys/i386/linux/linux_dummy.c
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