Add a new virDomainLxcEnterSecurityLabel() function as a
counterpart to virDomainLxcEnterNamespaces(), which can
change the current calling process to have a new security
context. This call runs client side, not in libvirtd
so we can't use the security driver infrastructure.
When entering a namespace, the process spawned from virsh
will default to running with the security label of virsh.
The actual desired behaviour is to run with the security
label of the container most of the time. So this changes
virsh lxc-enter-namespace command to invoke the
virDomainLxcEnterSecurityLabel method.
The current behaviour is:
LABEL PID TTY TIME CMD
system_u:system_r:svirt_lxc_net_t:s0:c0.c1023 1 pts/0 00:00:00 systemd
system_u:system_r:svirt_lxc_net_t:s0:c0.c1023 3 pts/1 00:00:00 sh
system_u:system_r:svirt_lxc_net_t:s0:c0.c1023 24 ? 00:00:00 systemd-journal
system_u:system_r:svirt_lxc_net_t:s0:c0.c1023 29 ? 00:00:00 dhclient
staff_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 47 ? 00:00:00 ps
Note the ps command is running as unconfined_t, After this patch,
The new behaviour is this:
virsh -c lxc:/// lxc-enter-namespace dan -- /bin/ps -eZ
LABEL PID TTY TIME CMD
system_u:system_r:svirt_lxc_net_t:s0:c0.c1023 1 pts/0 00:00:00 systemd
system_u:system_r:svirt_lxc_net_t:s0:c0.c1023 3 pts/1 00:00:00 sh
system_u:system_r:svirt_lxc_net_t:s0:c0.c1023 24 ? 00:00:00 systemd-journal
system_u:system_r:svirt_lxc_net_t:s0:c0.c1023 32 ? 00:00:00 dhclient
system_u:system_r:svirt_lxc_net_t:s0:c0.c1023 38 ? 00:00:00 ps
The '--noseclabel' flag can be used to skip security labelling.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Properly check the return value of vshCommandOptStringReq for xmlfile:
* error out on incorrect input (--xmlfile '')
* use default XML <domainsnapshot/> with no --xmlfile specified
(Broken by commit b2e8585)
Bug: https://bugzilla.redhat.com/show_bug.cgi?id=919826
RHEL4 vintage libxml2 header files are missing xmlSaveToBuffer
despite the symbol existing in the binary
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Only nodedev-destroy and nodedev-dumpxml can benifit from the
new API, other commands like nodedev-detach only works for
PCI devices, WWN makes no sense for them.
This patch switches string option retrieval to vshCommandOptStringReq
and refactors some error paths to avoid an unlikely memory leak of a
secret object in cmdSecretSetValue.
also avoids potential NULL pointer dereference:
$ virsh snapshot-current asdf ""
error: invalid snapshotname argument '(null)'
by removing the error message in favor of vshCommandOptStringReq
This patch adds some empty lines to separate blocks of code, cleans up
unnecessary error message constructs in cmdNodeDeviceDetach,
cmdNodeDeviceReAttach, cmdNodeDeviceReset and refactors error paths in
cmdNodeDeviceDumpXML.
This patch adds a helper function with similar semantics to
vshCommandOptString that requests a string argument, but does some error
reporting without the need to do it in the functions themselves.
The error reporting also provides information about the parameter whose
retrieval failed.
Way back when I started making changes for Coverity messages my first set
were to a bunch of CHECKED_RETURN errors. In particular virAsprintf() had
a few callers that Coverity noted didn't check their return (although some
did check if the buffer being printed to was NULL or not).
It was suggested at the time as a further patch an ATTRIBUTE_RETURN_CHECK
should be added to virAsprintf(), see:
https://www.redhat.com/archives/libvir-list/2013-January/msg00120.html
This patch does that and fixes a few more instances not found by Coverity
that failed the check.
When a disk-only snapshot is requested the domain is treated as if it
was offline. This forbids to mix memory checkpoints with the DISK_ONLY
flag.
This patch improves the error message and mentions the restriction in
the virsh man page.
