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d18147940f
This patch introduces support for LXC specific public APIs. In
common with what was done for QEMU, this creates a libvirt_lxc.so
library and libvirt/libvirt-lxc.h header file.
The actual APIs are
int virDomainLxcOpenNamespace(virDomainPtr domain,
int **fdlist,
unsigned int flags);
int virDomainLxcEnterNamespace(virDomainPtr domain,
unsigned int nfdlist,
int *fdlist,
unsigned int *noldfdlist,
int **oldfdlist,
unsigned int flags);
which provide a way to use the setns() system call to move the
calling process into the container's namespace. It is not
practical to write in a generically applicable manner. The
nearest that we could get to such an API would be an API which
allows to pass a command + argv to be executed inside a
container. Even if we had such a generic API, this LXC specific
API is still useful, because it allows the caller to maintain
the current process context, in particular any I/O streams they
have open.
NB the virDomainLxcEnterNamespace() API is special in that it
runs client side, so does not involve the internal driver API.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
20 lines
737 B
XML
20 lines
737 B
XML
<?xml version="1.0"?>
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<api name='libvir-lxc-python'>
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<symbols>
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<function name='virDomainLxcOpenNamespace' file='python-lxc'>
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<info><![CDATA[This API is LXC specific, so it will only work with hypervisor
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connections to the LXC driver.
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Open the namespaces associated with the container @domain
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and return a list of file descriptors associated with the
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container.
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The returned file descriptors are intended to be used with
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the setns() system call.]]></info>
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<return type='int' info='the list of open file descriptors, or -1 on error'/>
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<arg name='domain' type='virDomainPtr' info='a domain object'/>
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<arg name='flags' type='unsigned int' info='currently unused, pass 0'/>
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</function>
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</symbols>
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</api>
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