3d212b41e9
Under SELinux, Unix domain sockets have two labels. One is on the disk and can be set with commands such as chcon(1). There is a different label stored in memory (called the process label). This can only be set by the process creating the socket. When using SELinux + SVirt and wanting qemu to be able to connect to a qemu-nbd instance, you must set both labels correctly first. For qemu-nbd the options to set the second label are awkward. You can create the socket in a wrapper program and then exec into qemu-nbd. Or you could try something with LD_PRELOAD. This commit adds the ability to set the label straightforwardly on the command line, via the new --selinux-label flag. (The name of the flag is the same as the equivalent nbdkit option.) A worked example showing how to use the new option can be found in this bug: https://bugzilla.redhat.com/show_bug.cgi?id=1984938 Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1984938 Signed-off-by: Richard W.M. Jones <rjones@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> [eblake: rebase to configure changes, reject --selinux-label if it is not compiled in or not used on a Unix socket] Note that we may relax some of these restrictions at a later date, such as making it possible to label a TCP socket, although it may be smarter to do so as a generic QMP action rather than more one-off command lines in qemu-nbd. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20211115202944.615966-1-eblake@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> [eblake: adjust meson output as suggested by thuth] Signed-off-by: Eric Blake <eblake@redhat.com>
33 lines
709 B
Docker
33 lines
709 B
Docker
FROM registry.fedoraproject.org/fedora:34
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ENV PACKAGES \
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bzip2 \
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ccache \
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diffutils \
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findutils \
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gcc \
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git \
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libffi-devel.i686 \
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libselinux-devel.i686 \
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libtasn1-devel.i686 \
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libzstd-devel.i686 \
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make \
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meson \
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ninja-build \
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glib2-devel.i686 \
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glibc-devel.i686 \
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glibc-static.i686 \
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gnutls-devel.i686 \
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nettle-devel.i686 \
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pcre-devel.i686 \
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perl-Test-Harness \
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pixman-devel.i686 \
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sysprof-capture-devel.i686 \
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zlib-devel.i686
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ENV QEMU_CONFIGURE_OPTS --cpu=i386 --disable-vhost-user
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ENV PKG_CONFIG_LIBDIR /usr/lib/pkgconfig
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RUN dnf update -y && dnf install -y $PACKAGES
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RUN rpm -q $PACKAGES | sort > /packages.txt
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