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there is a race condition where the child process is immediately
killed:
[pid 2576752] arch_prctl(0x3001 /* ARCH_??? */, 0x7ffdf612f170) = -1 EINVAL (Invalid argument)
[pid 2576752] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
[pid 2576752] --- SIGTERM {si_signo=SIGTERM, si_code=SI_USER, si_pid=2576742, si_uid=0} ---
[pid 2576752] +++ killed by SIGTERM +++
this happens because the parent process here really means the "parent
thread".
Since there is no way of running it on the main thread,
let's skip this functionality altogether and use kill(2).
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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write to the error pipe only in case of an error. Otherwise we may
end up in a race condition in the select statement below as the read
from errChan happens before initComplete and the function returns
immediately nil.
Closes: https://github.com/containers/libpod/issues/5182
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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Previously, rootlessport was using /var/tmp as the tmp dir.
Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
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Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
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RootlessKit port forwarder has a lot of advantages over the slirp4netns port forwarder:
* Very high throughput.
Benchmark result on Travis: socat: 5.2 Gbps, slirp4netns: 8.3 Gbps, RootlessKit: 27.3 Gbps
(https://travis-ci.org/rootless-containers/rootlesskit/builds/597056377)
* Connections from the host are treated as 127.0.0.1 rather than 10.0.2.2 in the namespace.
No UDP issue (#4586)
* No tcp_rmem issue (#4537)
* Probably works with IPv6. Even if not, it is trivial to support IPv6. (#4311)
* Easily extensible for future support of SCTP
* Easily extensible for future support of `lxc-user-nic` SUID network
RootlessKit port forwarder has been already adopted as the default port forwarder by Rootless Docker/Moby,
and no issue has been reported AFAIK.
As the port forwarder is imported as a Go package, no `rootlesskit` binary is required for Podman.
Fix #4586
May-fix #4559
Fix #4537
May-fix #4311
See https://github.com/rootless-containers/rootlesskit/blob/v0.7.0/pkg/port/builtin/builtin.go
Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
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