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| author |   Adrian Freihofer <adrian.freihofer@gmail.com> | 2021-11-12 23:29:18 +0100 |
|---|---|---|
| committer |   Richard Purdie <richard.purdie@linuxfoundation.org> | 2021-11-13 16:09:53 +0000 |
| commit | 448eb1fd21287ba16b17e9402ce040b86ae3638c (patch) | |
| tree | 4ed6a6e9f9d22f88ecfa6e4cef3d7879da47e293 | |
| parent | a2023319eb315ba71f6c6699d2068e51524a2908 (diff) | |
| download | openembedded-core-contrib-448eb1fd21287ba16b17e9402ce040b86ae3638c.tar.gz | |
runqemu: support rootfs mounted ro
Optionally allow to set QB_KERNEL_ROOT to e.g. "/dev/vda ro" to mount the
rootfs reay-only in Qemu.
Signed-off-by: Adrian Freihofer <adrian.freihofer@siemens.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
| -rw-r--r-- | meta/classes/qemuboot.bbclass | 2 | ||||
| -rwxr-xr-x | scripts/runqemu | 8 |
2 files changed, 9 insertions, 1 deletions
diff --git a/meta/classes/qemuboot.bbclass b/meta/classes/qemuboot.bbclass index bf529e9aa4..8cdb544a94 100644 --- a/meta/classes/qemuboot.bbclass +++ b/meta/classes/qemuboot.bbclass @@ -36,6 +36,8 @@ # in system mode, where system is experiencing entropy starvation # # QB_KERNEL_ROOT: kernel's root, e.g., /dev/vda +# By default "/dev/vda rw" gets passed to the kernel. +# To mount the rootfs read-only QB_KERNEL_ROOT can be set to e.g. "/dev/vda ro". # # QB_NETWORK_DEVICE: network device, e.g., "-device virtio-net-pci,netdev=net0,mac=@MAC@", # it needs work with QB_TAP_OPT and QB_SLIRP_OPT. diff --git a/scripts/runqemu b/scripts/runqemu index d4f0888f8d..efb98ab9e0 100755 --- a/scripts/runqemu +++ b/scripts/runqemu @@ -1266,7 +1266,13 @@ class BaseConfig(object): self.rootfs_options = vm_drive if not self.fstype in self.vmtypes: self.rootfs_options += ' -no-reboot' - self.kernel_cmdline = 'root=%s rw' % (self.get('QB_KERNEL_ROOT')) + + # By default, ' rw' is appended to QB_KERNEL_ROOT unless either ro or rw is explicitly passed. + qb_kernel_root = self.get('QB_KERNEL_ROOT') + qb_kernel_root_l = qb_kernel_root.split() + if not ('ro' in qb_kernel_root_l or 'rw' in qb_kernel_root_l): + qb_kernel_root += ' rw' + self.kernel_cmdline = 'root=%s' % qb_kernel_root if self.fstype == 'nfs': self.rootfs_options = '' |